Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 1 | /* -*- mode: c; c-basic-offset: 8; -*- |
| 2 | * vim: noexpandtab sw=8 ts=8 sts=0: |
| 3 | * |
| 4 | * xattr.c |
| 5 | * |
Tiger Yang | c3cb682 | 2008-10-23 16:33:03 +0800 | [diff] [blame] | 6 | * Copyright (C) 2004, 2008 Oracle. All rights reserved. |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 7 | * |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 8 | * CREDITS: |
Tiger Yang | c3cb682 | 2008-10-23 16:33:03 +0800 | [diff] [blame] | 9 | * Lots of code in this file is copy from linux/fs/ext3/xattr.c. |
| 10 | * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de> |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 11 | * |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 12 | * This program is free software; you can redistribute it and/or |
| 13 | * modify it under the terms of the GNU General Public |
Tiger Yang | c3cb682 | 2008-10-23 16:33:03 +0800 | [diff] [blame] | 14 | * License version 2 as published by the Free Software Foundation. |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 19 | * General Public License for more details. |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 20 | */ |
| 21 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 22 | #include <linux/capability.h> |
| 23 | #include <linux/fs.h> |
| 24 | #include <linux/types.h> |
| 25 | #include <linux/slab.h> |
| 26 | #include <linux/highmem.h> |
| 27 | #include <linux/pagemap.h> |
| 28 | #include <linux/uio.h> |
| 29 | #include <linux/sched.h> |
| 30 | #include <linux/splice.h> |
| 31 | #include <linux/mount.h> |
| 32 | #include <linux/writeback.h> |
| 33 | #include <linux/falloc.h> |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 34 | #include <linux/sort.h> |
Mark Fasheh | 99219ae | 2008-10-07 14:52:59 -0700 | [diff] [blame] | 35 | #include <linux/init.h> |
| 36 | #include <linux/module.h> |
| 37 | #include <linux/string.h> |
Tiger Yang | 923f7f3 | 2008-11-14 11:16:27 +0800 | [diff] [blame] | 38 | #include <linux/security.h> |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 39 | |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 40 | #include <cluster/masklog.h> |
| 41 | |
| 42 | #include "ocfs2.h" |
| 43 | #include "alloc.h" |
Joel Becker | d6b32bb | 2008-10-17 14:55:01 -0700 | [diff] [blame] | 44 | #include "blockcheck.h" |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 45 | #include "dlmglue.h" |
| 46 | #include "file.h" |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 47 | #include "symlink.h" |
| 48 | #include "sysfile.h" |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 49 | #include "inode.h" |
| 50 | #include "journal.h" |
| 51 | #include "ocfs2_fs.h" |
| 52 | #include "suballoc.h" |
| 53 | #include "uptodate.h" |
| 54 | #include "buffer_head_io.h" |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 55 | #include "super.h" |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 56 | #include "xattr.h" |
Tao Ma | 492a8a3 | 2009-08-18 11:43:17 +0800 | [diff] [blame] | 57 | #include "refcounttree.h" |
Tao Ma | 0fe9b66 | 2009-08-18 11:47:56 +0800 | [diff] [blame] | 58 | #include "acl.h" |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 59 | #include "ocfs2_trace.h" |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 60 | |
| 61 | struct ocfs2_xattr_def_value_root { |
| 62 | struct ocfs2_xattr_value_root xv; |
| 63 | struct ocfs2_extent_rec er; |
| 64 | }; |
| 65 | |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 66 | struct ocfs2_xattr_bucket { |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 67 | /* The inode these xattrs are associated with */ |
| 68 | struct inode *bu_inode; |
| 69 | |
| 70 | /* The actual buffers that make up the bucket */ |
Joel Becker | 4ac6032 | 2008-10-18 19:11:42 -0700 | [diff] [blame] | 71 | struct buffer_head *bu_bhs[OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET]; |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 72 | |
| 73 | /* How many blocks make up one bucket for this filesystem */ |
| 74 | int bu_blocks; |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 75 | }; |
| 76 | |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 77 | struct ocfs2_xattr_set_ctxt { |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 78 | handle_t *handle; |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 79 | struct ocfs2_alloc_context *meta_ac; |
| 80 | struct ocfs2_alloc_context *data_ac; |
| 81 | struct ocfs2_cached_dealloc_ctxt dealloc; |
Tao Ma | 5f5261a | 2010-05-13 22:49:05 +0800 | [diff] [blame] | 82 | int set_abort; |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 83 | }; |
| 84 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 85 | #define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root)) |
| 86 | #define OCFS2_XATTR_INLINE_SIZE 80 |
Tiger Yang | 4442f51 | 2009-02-20 11:11:50 +0800 | [diff] [blame] | 87 | #define OCFS2_XATTR_HEADER_GAP 4 |
Tiger Yang | 534eadd | 2008-11-14 11:16:41 +0800 | [diff] [blame] | 88 | #define OCFS2_XATTR_FREE_IN_IBODY (OCFS2_MIN_XATTR_INLINE_SIZE \ |
| 89 | - sizeof(struct ocfs2_xattr_header) \ |
Tiger Yang | 4442f51 | 2009-02-20 11:11:50 +0800 | [diff] [blame] | 90 | - OCFS2_XATTR_HEADER_GAP) |
Tiger Yang | 89c38bd | 2008-11-14 11:17:41 +0800 | [diff] [blame] | 91 | #define OCFS2_XATTR_FREE_IN_BLOCK(ptr) ((ptr)->i_sb->s_blocksize \ |
| 92 | - sizeof(struct ocfs2_xattr_block) \ |
| 93 | - sizeof(struct ocfs2_xattr_header) \ |
Tiger Yang | 4442f51 | 2009-02-20 11:11:50 +0800 | [diff] [blame] | 94 | - OCFS2_XATTR_HEADER_GAP) |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 95 | |
| 96 | static struct ocfs2_xattr_def_value_root def_xv = { |
| 97 | .xv.xr_list.l_count = cpu_to_le16(1), |
| 98 | }; |
| 99 | |
Stephen Hemminger | 537d81c | 2010-05-13 17:53:22 -0700 | [diff] [blame] | 100 | const struct xattr_handler *ocfs2_xattr_handlers[] = { |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 101 | &ocfs2_xattr_user_handler, |
Tiger Yang | 929fb01 | 2008-11-14 11:17:04 +0800 | [diff] [blame] | 102 | &ocfs2_xattr_acl_access_handler, |
| 103 | &ocfs2_xattr_acl_default_handler, |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 104 | &ocfs2_xattr_trusted_handler, |
Tiger Yang | 923f7f3 | 2008-11-14 11:16:27 +0800 | [diff] [blame] | 105 | &ocfs2_xattr_security_handler, |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 106 | NULL |
| 107 | }; |
| 108 | |
Stephen Hemminger | 537d81c | 2010-05-13 17:53:22 -0700 | [diff] [blame] | 109 | static const struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = { |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 110 | [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler, |
Tiger Yang | 929fb01 | 2008-11-14 11:17:04 +0800 | [diff] [blame] | 111 | [OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS] |
| 112 | = &ocfs2_xattr_acl_access_handler, |
| 113 | [OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT] |
| 114 | = &ocfs2_xattr_acl_default_handler, |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 115 | [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler, |
Tiger Yang | 923f7f3 | 2008-11-14 11:16:27 +0800 | [diff] [blame] | 116 | [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler, |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 117 | }; |
| 118 | |
| 119 | struct ocfs2_xattr_info { |
Joel Becker | 6b240ff | 2009-08-14 18:02:52 -0700 | [diff] [blame] | 120 | int xi_name_index; |
| 121 | const char *xi_name; |
Joel Becker | 18853b9 | 2009-08-14 18:17:07 -0700 | [diff] [blame] | 122 | int xi_name_len; |
Joel Becker | 6b240ff | 2009-08-14 18:02:52 -0700 | [diff] [blame] | 123 | const void *xi_value; |
| 124 | size_t xi_value_len; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 125 | }; |
| 126 | |
| 127 | struct ocfs2_xattr_search { |
| 128 | struct buffer_head *inode_bh; |
| 129 | /* |
| 130 | * xattr_bh point to the block buffer head which has extended attribute |
| 131 | * when extended attribute in inode, xattr_bh is equal to inode_bh. |
| 132 | */ |
| 133 | struct buffer_head *xattr_bh; |
| 134 | struct ocfs2_xattr_header *header; |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 135 | struct ocfs2_xattr_bucket *bucket; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 136 | void *base; |
| 137 | void *end; |
| 138 | struct ocfs2_xattr_entry *here; |
| 139 | int not_found; |
| 140 | }; |
| 141 | |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 142 | /* Operations on struct ocfs2_xa_entry */ |
| 143 | struct ocfs2_xa_loc; |
| 144 | struct ocfs2_xa_loc_operations { |
| 145 | /* |
Joel Becker | cf2bc80 | 2009-08-18 13:52:38 -0700 | [diff] [blame] | 146 | * Journal functions |
| 147 | */ |
| 148 | int (*xlo_journal_access)(handle_t *handle, struct ocfs2_xa_loc *loc, |
| 149 | int type); |
| 150 | void (*xlo_journal_dirty)(handle_t *handle, struct ocfs2_xa_loc *loc); |
| 151 | |
| 152 | /* |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 153 | * Return a pointer to the appropriate buffer in loc->xl_storage |
| 154 | * at the given offset from loc->xl_header. |
| 155 | */ |
| 156 | void *(*xlo_offset_pointer)(struct ocfs2_xa_loc *loc, int offset); |
| 157 | |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 158 | /* Can we reuse the existing entry for the new value? */ |
| 159 | int (*xlo_can_reuse)(struct ocfs2_xa_loc *loc, |
| 160 | struct ocfs2_xattr_info *xi); |
| 161 | |
| 162 | /* How much space is needed for the new value? */ |
| 163 | int (*xlo_check_space)(struct ocfs2_xa_loc *loc, |
| 164 | struct ocfs2_xattr_info *xi); |
| 165 | |
| 166 | /* |
| 167 | * Return the offset of the first name+value pair. This is |
| 168 | * the start of our downward-filling free space. |
| 169 | */ |
| 170 | int (*xlo_get_free_start)(struct ocfs2_xa_loc *loc); |
| 171 | |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 172 | /* |
| 173 | * Remove the name+value at this location. Do whatever is |
| 174 | * appropriate with the remaining name+value pairs. |
| 175 | */ |
| 176 | void (*xlo_wipe_namevalue)(struct ocfs2_xa_loc *loc); |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 177 | |
| 178 | /* Fill xl_entry with a new entry */ |
| 179 | void (*xlo_add_entry)(struct ocfs2_xa_loc *loc, u32 name_hash); |
| 180 | |
| 181 | /* Add name+value storage to an entry */ |
| 182 | void (*xlo_add_namevalue)(struct ocfs2_xa_loc *loc, int size); |
Joel Becker | 3fc12af | 2009-08-18 13:20:27 -0700 | [diff] [blame] | 183 | |
| 184 | /* |
| 185 | * Initialize the value buf's access and bh fields for this entry. |
| 186 | * ocfs2_xa_fill_value_buf() will handle the xv pointer. |
| 187 | */ |
| 188 | void (*xlo_fill_value_buf)(struct ocfs2_xa_loc *loc, |
| 189 | struct ocfs2_xattr_value_buf *vb); |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 190 | }; |
| 191 | |
| 192 | /* |
| 193 | * Describes an xattr entry location. This is a memory structure |
| 194 | * tracking the on-disk structure. |
| 195 | */ |
| 196 | struct ocfs2_xa_loc { |
Joel Becker | cf2bc80 | 2009-08-18 13:52:38 -0700 | [diff] [blame] | 197 | /* This xattr belongs to this inode */ |
| 198 | struct inode *xl_inode; |
| 199 | |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 200 | /* The ocfs2_xattr_header inside the on-disk storage. Not NULL. */ |
| 201 | struct ocfs2_xattr_header *xl_header; |
| 202 | |
| 203 | /* Bytes from xl_header to the end of the storage */ |
| 204 | int xl_size; |
| 205 | |
| 206 | /* |
| 207 | * The ocfs2_xattr_entry this location describes. If this is |
| 208 | * NULL, this location describes the on-disk structure where it |
| 209 | * would have been. |
| 210 | */ |
| 211 | struct ocfs2_xattr_entry *xl_entry; |
| 212 | |
| 213 | /* |
| 214 | * Internal housekeeping |
| 215 | */ |
| 216 | |
| 217 | /* Buffer(s) containing this entry */ |
| 218 | void *xl_storage; |
| 219 | |
| 220 | /* Operations on the storage backing this location */ |
| 221 | const struct ocfs2_xa_loc_operations *xl_ops; |
| 222 | }; |
| 223 | |
Joel Becker | 199799a | 2009-08-14 19:04:15 -0700 | [diff] [blame] | 224 | /* |
| 225 | * Convenience functions to calculate how much space is needed for a |
| 226 | * given name+value pair |
| 227 | */ |
| 228 | static int namevalue_size(int name_len, uint64_t value_len) |
| 229 | { |
| 230 | if (value_len > OCFS2_XATTR_INLINE_SIZE) |
| 231 | return OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; |
| 232 | else |
| 233 | return OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len); |
| 234 | } |
| 235 | |
| 236 | static int namevalue_size_xi(struct ocfs2_xattr_info *xi) |
| 237 | { |
| 238 | return namevalue_size(xi->xi_name_len, xi->xi_value_len); |
| 239 | } |
| 240 | |
| 241 | static int namevalue_size_xe(struct ocfs2_xattr_entry *xe) |
| 242 | { |
| 243 | u64 value_len = le64_to_cpu(xe->xe_value_size); |
| 244 | |
| 245 | BUG_ON((value_len > OCFS2_XATTR_INLINE_SIZE) && |
| 246 | ocfs2_xattr_is_local(xe)); |
| 247 | return namevalue_size(xe->xe_name_len, value_len); |
| 248 | } |
| 249 | |
| 250 | |
Tao Ma | fd68a89 | 2009-08-18 11:43:21 +0800 | [diff] [blame] | 251 | static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb, |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 252 | struct ocfs2_xattr_header *xh, |
| 253 | int index, |
| 254 | int *block_off, |
| 255 | int *new_offset); |
| 256 | |
Joel Becker | 54f443f | 2008-10-20 18:43:07 -0700 | [diff] [blame] | 257 | static int ocfs2_xattr_block_find(struct inode *inode, |
| 258 | int name_index, |
| 259 | const char *name, |
| 260 | struct ocfs2_xattr_search *xs); |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 261 | static int ocfs2_xattr_index_block_find(struct inode *inode, |
| 262 | struct buffer_head *root_bh, |
| 263 | int name_index, |
| 264 | const char *name, |
| 265 | struct ocfs2_xattr_search *xs); |
| 266 | |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 267 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, |
Tao Ma | 47bca49 | 2009-08-18 11:43:42 +0800 | [diff] [blame] | 268 | struct buffer_head *blk_bh, |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 269 | char *buffer, |
| 270 | size_t buffer_size); |
| 271 | |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 272 | static int ocfs2_xattr_create_index_block(struct inode *inode, |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 273 | struct ocfs2_xattr_search *xs, |
| 274 | struct ocfs2_xattr_set_ctxt *ctxt); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 275 | |
| 276 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, |
| 277 | struct ocfs2_xattr_info *xi, |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 278 | struct ocfs2_xattr_search *xs, |
| 279 | struct ocfs2_xattr_set_ctxt *ctxt); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 280 | |
Tao Ma | 47bca49 | 2009-08-18 11:43:42 +0800 | [diff] [blame] | 281 | typedef int (xattr_tree_rec_func)(struct inode *inode, |
| 282 | struct buffer_head *root_bh, |
| 283 | u64 blkno, u32 cpos, u32 len, void *para); |
| 284 | static int ocfs2_iterate_xattr_index_block(struct inode *inode, |
| 285 | struct buffer_head *root_bh, |
| 286 | xattr_tree_rec_func *rec_func, |
| 287 | void *para); |
| 288 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, |
| 289 | struct ocfs2_xattr_bucket *bucket, |
| 290 | void *para); |
| 291 | static int ocfs2_rm_xattr_cluster(struct inode *inode, |
| 292 | struct buffer_head *root_bh, |
| 293 | u64 blkno, |
| 294 | u32 cpos, |
| 295 | u32 len, |
| 296 | void *para); |
| 297 | |
Joel Becker | c58b603 | 2008-11-26 13:36:24 -0800 | [diff] [blame] | 298 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
| 299 | u64 src_blk, u64 last_blk, u64 to_blk, |
| 300 | unsigned int start_bucket, |
| 301 | u32 *first_hash); |
Tao Ma | 492a8a3 | 2009-08-18 11:43:17 +0800 | [diff] [blame] | 302 | static int ocfs2_prepare_refcount_xattr(struct inode *inode, |
| 303 | struct ocfs2_dinode *di, |
| 304 | struct ocfs2_xattr_info *xi, |
| 305 | struct ocfs2_xattr_search *xis, |
| 306 | struct ocfs2_xattr_search *xbs, |
| 307 | struct ocfs2_refcount_tree **ref_tree, |
| 308 | int *meta_need, |
| 309 | int *credits); |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 310 | static int ocfs2_get_xattr_tree_value_root(struct super_block *sb, |
| 311 | struct ocfs2_xattr_bucket *bucket, |
| 312 | int offset, |
| 313 | struct ocfs2_xattr_value_root **xv, |
| 314 | struct buffer_head **bh); |
Tao Ma | a394425 | 2008-08-18 17:38:54 +0800 | [diff] [blame] | 315 | |
Tiger Yang | 0030e00 | 2008-10-23 16:33:33 +0800 | [diff] [blame] | 316 | static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb) |
| 317 | { |
| 318 | return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE; |
| 319 | } |
| 320 | |
| 321 | static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb) |
| 322 | { |
| 323 | return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits); |
| 324 | } |
| 325 | |
Joel Becker | 9c7759a | 2008-10-24 16:21:03 -0700 | [diff] [blame] | 326 | #define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr) |
Joel Becker | 51def39 | 2008-10-24 16:57:21 -0700 | [diff] [blame] | 327 | #define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data) |
Joel Becker | 3e63294 | 2008-10-24 17:04:49 -0700 | [diff] [blame] | 328 | #define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0)) |
Joel Becker | 9c7759a | 2008-10-24 16:21:03 -0700 | [diff] [blame] | 329 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 330 | static struct ocfs2_xattr_bucket *ocfs2_xattr_bucket_new(struct inode *inode) |
Joel Becker | 6dde41d | 2008-10-24 17:16:48 -0700 | [diff] [blame] | 331 | { |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 332 | struct ocfs2_xattr_bucket *bucket; |
| 333 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
Joel Becker | 6dde41d | 2008-10-24 17:16:48 -0700 | [diff] [blame] | 334 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 335 | BUG_ON(blks > OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET); |
| 336 | |
| 337 | bucket = kzalloc(sizeof(struct ocfs2_xattr_bucket), GFP_NOFS); |
| 338 | if (bucket) { |
| 339 | bucket->bu_inode = inode; |
| 340 | bucket->bu_blocks = blks; |
| 341 | } |
| 342 | |
| 343 | return bucket; |
| 344 | } |
| 345 | |
| 346 | static void ocfs2_xattr_bucket_relse(struct ocfs2_xattr_bucket *bucket) |
| 347 | { |
| 348 | int i; |
| 349 | |
| 350 | for (i = 0; i < bucket->bu_blocks; i++) { |
Joel Becker | 6dde41d | 2008-10-24 17:16:48 -0700 | [diff] [blame] | 351 | brelse(bucket->bu_bhs[i]); |
| 352 | bucket->bu_bhs[i] = NULL; |
| 353 | } |
| 354 | } |
| 355 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 356 | static void ocfs2_xattr_bucket_free(struct ocfs2_xattr_bucket *bucket) |
| 357 | { |
| 358 | if (bucket) { |
| 359 | ocfs2_xattr_bucket_relse(bucket); |
| 360 | bucket->bu_inode = NULL; |
| 361 | kfree(bucket); |
| 362 | } |
| 363 | } |
| 364 | |
Joel Becker | 784b816 | 2008-10-24 17:33:40 -0700 | [diff] [blame] | 365 | /* |
| 366 | * A bucket that has never been written to disk doesn't need to be |
| 367 | * read. We just need the buffer_heads. Don't call this for |
| 368 | * buckets that are already on disk. ocfs2_read_xattr_bucket() initializes |
| 369 | * them fully. |
| 370 | */ |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 371 | static int ocfs2_init_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
Joel Becker | 784b816 | 2008-10-24 17:33:40 -0700 | [diff] [blame] | 372 | u64 xb_blkno) |
| 373 | { |
| 374 | int i, rc = 0; |
Joel Becker | 784b816 | 2008-10-24 17:33:40 -0700 | [diff] [blame] | 375 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 376 | for (i = 0; i < bucket->bu_blocks; i++) { |
| 377 | bucket->bu_bhs[i] = sb_getblk(bucket->bu_inode->i_sb, |
| 378 | xb_blkno + i); |
Joel Becker | 784b816 | 2008-10-24 17:33:40 -0700 | [diff] [blame] | 379 | if (!bucket->bu_bhs[i]) { |
| 380 | rc = -EIO; |
| 381 | mlog_errno(rc); |
| 382 | break; |
| 383 | } |
| 384 | |
Joel Becker | 8cb471e | 2009-02-10 20:00:41 -0800 | [diff] [blame] | 385 | if (!ocfs2_buffer_uptodate(INODE_CACHE(bucket->bu_inode), |
Tao Ma | 757055a | 2008-11-06 08:10:48 +0800 | [diff] [blame] | 386 | bucket->bu_bhs[i])) |
Joel Becker | 8cb471e | 2009-02-10 20:00:41 -0800 | [diff] [blame] | 387 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(bucket->bu_inode), |
Tao Ma | 757055a | 2008-11-06 08:10:48 +0800 | [diff] [blame] | 388 | bucket->bu_bhs[i]); |
Joel Becker | 784b816 | 2008-10-24 17:33:40 -0700 | [diff] [blame] | 389 | } |
| 390 | |
| 391 | if (rc) |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 392 | ocfs2_xattr_bucket_relse(bucket); |
Joel Becker | 784b816 | 2008-10-24 17:33:40 -0700 | [diff] [blame] | 393 | return rc; |
| 394 | } |
| 395 | |
| 396 | /* Read the xattr bucket at xb_blkno */ |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 397 | static int ocfs2_read_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
Joel Becker | 784b816 | 2008-10-24 17:33:40 -0700 | [diff] [blame] | 398 | u64 xb_blkno) |
| 399 | { |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 400 | int rc; |
Joel Becker | 784b816 | 2008-10-24 17:33:40 -0700 | [diff] [blame] | 401 | |
Joel Becker | 8cb471e | 2009-02-10 20:00:41 -0800 | [diff] [blame] | 402 | rc = ocfs2_read_blocks(INODE_CACHE(bucket->bu_inode), xb_blkno, |
Joel Becker | 970e493 | 2008-11-13 14:49:19 -0800 | [diff] [blame] | 403 | bucket->bu_blocks, bucket->bu_bhs, 0, |
| 404 | NULL); |
Joel Becker | 4d0e214 | 2008-12-05 11:19:37 -0800 | [diff] [blame] | 405 | if (!rc) { |
Tao Ma | c8b9cf9 | 2009-02-24 17:40:26 -0800 | [diff] [blame] | 406 | spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
Joel Becker | 4d0e214 | 2008-12-05 11:19:37 -0800 | [diff] [blame] | 407 | rc = ocfs2_validate_meta_ecc_bhs(bucket->bu_inode->i_sb, |
| 408 | bucket->bu_bhs, |
| 409 | bucket->bu_blocks, |
| 410 | &bucket_xh(bucket)->xh_check); |
Tao Ma | c8b9cf9 | 2009-02-24 17:40:26 -0800 | [diff] [blame] | 411 | spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
Joel Becker | 4d0e214 | 2008-12-05 11:19:37 -0800 | [diff] [blame] | 412 | if (rc) |
| 413 | mlog_errno(rc); |
| 414 | } |
| 415 | |
Joel Becker | 784b816 | 2008-10-24 17:33:40 -0700 | [diff] [blame] | 416 | if (rc) |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 417 | ocfs2_xattr_bucket_relse(bucket); |
Joel Becker | 784b816 | 2008-10-24 17:33:40 -0700 | [diff] [blame] | 418 | return rc; |
| 419 | } |
| 420 | |
Joel Becker | 1224be0 | 2008-10-24 18:47:33 -0700 | [diff] [blame] | 421 | static int ocfs2_xattr_bucket_journal_access(handle_t *handle, |
Joel Becker | 1224be0 | 2008-10-24 18:47:33 -0700 | [diff] [blame] | 422 | struct ocfs2_xattr_bucket *bucket, |
| 423 | int type) |
| 424 | { |
| 425 | int i, rc = 0; |
Joel Becker | 1224be0 | 2008-10-24 18:47:33 -0700 | [diff] [blame] | 426 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 427 | for (i = 0; i < bucket->bu_blocks; i++) { |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 428 | rc = ocfs2_journal_access(handle, |
| 429 | INODE_CACHE(bucket->bu_inode), |
Joel Becker | 1224be0 | 2008-10-24 18:47:33 -0700 | [diff] [blame] | 430 | bucket->bu_bhs[i], type); |
| 431 | if (rc) { |
| 432 | mlog_errno(rc); |
| 433 | break; |
| 434 | } |
| 435 | } |
| 436 | |
| 437 | return rc; |
| 438 | } |
| 439 | |
| 440 | static void ocfs2_xattr_bucket_journal_dirty(handle_t *handle, |
Joel Becker | 1224be0 | 2008-10-24 18:47:33 -0700 | [diff] [blame] | 441 | struct ocfs2_xattr_bucket *bucket) |
| 442 | { |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 443 | int i; |
Joel Becker | 1224be0 | 2008-10-24 18:47:33 -0700 | [diff] [blame] | 444 | |
Tao Ma | c8b9cf9 | 2009-02-24 17:40:26 -0800 | [diff] [blame] | 445 | spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
Joel Becker | 4d0e214 | 2008-12-05 11:19:37 -0800 | [diff] [blame] | 446 | ocfs2_compute_meta_ecc_bhs(bucket->bu_inode->i_sb, |
| 447 | bucket->bu_bhs, bucket->bu_blocks, |
| 448 | &bucket_xh(bucket)->xh_check); |
Tao Ma | c8b9cf9 | 2009-02-24 17:40:26 -0800 | [diff] [blame] | 449 | spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
Joel Becker | 4d0e214 | 2008-12-05 11:19:37 -0800 | [diff] [blame] | 450 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 451 | for (i = 0; i < bucket->bu_blocks; i++) |
Joel Becker | 1224be0 | 2008-10-24 18:47:33 -0700 | [diff] [blame] | 452 | ocfs2_journal_dirty(handle, bucket->bu_bhs[i]); |
| 453 | } |
| 454 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 455 | static void ocfs2_xattr_bucket_copy_data(struct ocfs2_xattr_bucket *dest, |
Joel Becker | 4980c6d | 2008-10-24 18:54:43 -0700 | [diff] [blame] | 456 | struct ocfs2_xattr_bucket *src) |
| 457 | { |
| 458 | int i; |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 459 | int blocksize = src->bu_inode->i_sb->s_blocksize; |
Joel Becker | 4980c6d | 2008-10-24 18:54:43 -0700 | [diff] [blame] | 460 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 461 | BUG_ON(dest->bu_blocks != src->bu_blocks); |
| 462 | BUG_ON(dest->bu_inode != src->bu_inode); |
| 463 | |
| 464 | for (i = 0; i < src->bu_blocks; i++) { |
Joel Becker | 4980c6d | 2008-10-24 18:54:43 -0700 | [diff] [blame] | 465 | memcpy(bucket_block(dest, i), bucket_block(src, i), |
| 466 | blocksize); |
| 467 | } |
| 468 | } |
Joel Becker | 1224be0 | 2008-10-24 18:47:33 -0700 | [diff] [blame] | 469 | |
Joel Becker | 4ae1d69 | 2008-11-13 14:49:18 -0800 | [diff] [blame] | 470 | static int ocfs2_validate_xattr_block(struct super_block *sb, |
| 471 | struct buffer_head *bh) |
| 472 | { |
Joel Becker | d6b32bb | 2008-10-17 14:55:01 -0700 | [diff] [blame] | 473 | int rc; |
Joel Becker | 4ae1d69 | 2008-11-13 14:49:18 -0800 | [diff] [blame] | 474 | struct ocfs2_xattr_block *xb = |
| 475 | (struct ocfs2_xattr_block *)bh->b_data; |
| 476 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 477 | trace_ocfs2_validate_xattr_block((unsigned long long)bh->b_blocknr); |
Joel Becker | 4ae1d69 | 2008-11-13 14:49:18 -0800 | [diff] [blame] | 478 | |
Joel Becker | d6b32bb | 2008-10-17 14:55:01 -0700 | [diff] [blame] | 479 | BUG_ON(!buffer_uptodate(bh)); |
| 480 | |
| 481 | /* |
| 482 | * If the ecc fails, we return the error but otherwise |
| 483 | * leave the filesystem running. We know any error is |
| 484 | * local to this block. |
| 485 | */ |
| 486 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &xb->xb_check); |
| 487 | if (rc) |
| 488 | return rc; |
| 489 | |
| 490 | /* |
| 491 | * Errors after here are fatal |
| 492 | */ |
| 493 | |
Joel Becker | 4ae1d69 | 2008-11-13 14:49:18 -0800 | [diff] [blame] | 494 | if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) { |
| 495 | ocfs2_error(sb, |
| 496 | "Extended attribute block #%llu has bad " |
| 497 | "signature %.*s", |
| 498 | (unsigned long long)bh->b_blocknr, 7, |
| 499 | xb->xb_signature); |
| 500 | return -EINVAL; |
| 501 | } |
| 502 | |
| 503 | if (le64_to_cpu(xb->xb_blkno) != bh->b_blocknr) { |
| 504 | ocfs2_error(sb, |
| 505 | "Extended attribute block #%llu has an " |
| 506 | "invalid xb_blkno of %llu", |
| 507 | (unsigned long long)bh->b_blocknr, |
| 508 | (unsigned long long)le64_to_cpu(xb->xb_blkno)); |
| 509 | return -EINVAL; |
| 510 | } |
| 511 | |
| 512 | if (le32_to_cpu(xb->xb_fs_generation) != OCFS2_SB(sb)->fs_generation) { |
| 513 | ocfs2_error(sb, |
| 514 | "Extended attribute block #%llu has an invalid " |
| 515 | "xb_fs_generation of #%u", |
| 516 | (unsigned long long)bh->b_blocknr, |
| 517 | le32_to_cpu(xb->xb_fs_generation)); |
| 518 | return -EINVAL; |
| 519 | } |
| 520 | |
| 521 | return 0; |
| 522 | } |
| 523 | |
| 524 | static int ocfs2_read_xattr_block(struct inode *inode, u64 xb_blkno, |
| 525 | struct buffer_head **bh) |
| 526 | { |
| 527 | int rc; |
| 528 | struct buffer_head *tmp = *bh; |
| 529 | |
Joel Becker | 8cb471e | 2009-02-10 20:00:41 -0800 | [diff] [blame] | 530 | rc = ocfs2_read_block(INODE_CACHE(inode), xb_blkno, &tmp, |
Joel Becker | 970e493 | 2008-11-13 14:49:19 -0800 | [diff] [blame] | 531 | ocfs2_validate_xattr_block); |
Joel Becker | 4ae1d69 | 2008-11-13 14:49:18 -0800 | [diff] [blame] | 532 | |
| 533 | /* If ocfs2_read_block() got us a new bh, pass it up. */ |
| 534 | if (!rc && !*bh) |
| 535 | *bh = tmp; |
| 536 | |
| 537 | return rc; |
| 538 | } |
| 539 | |
Tao Ma | 936b883 | 2008-10-09 23:06:14 +0800 | [diff] [blame] | 540 | static inline const char *ocfs2_xattr_prefix(int name_index) |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 541 | { |
Stephen Hemminger | 537d81c | 2010-05-13 17:53:22 -0700 | [diff] [blame] | 542 | const struct xattr_handler *handler = NULL; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 543 | |
| 544 | if (name_index > 0 && name_index < OCFS2_XATTR_MAX) |
| 545 | handler = ocfs2_xattr_handler_map[name_index]; |
| 546 | |
Tao Ma | 936b883 | 2008-10-09 23:06:14 +0800 | [diff] [blame] | 547 | return handler ? handler->prefix : NULL; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 548 | } |
| 549 | |
Mark Fasheh | 40daa16 | 2008-10-07 14:31:42 -0700 | [diff] [blame] | 550 | static u32 ocfs2_xattr_name_hash(struct inode *inode, |
Tao Ma | 2057e5c | 2008-10-09 23:06:13 +0800 | [diff] [blame] | 551 | const char *name, |
Mark Fasheh | 40daa16 | 2008-10-07 14:31:42 -0700 | [diff] [blame] | 552 | int name_len) |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 553 | { |
| 554 | /* Get hash value of uuid from super block */ |
| 555 | u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash; |
| 556 | int i; |
| 557 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 558 | /* hash extended attribute name */ |
| 559 | for (i = 0; i < name_len; i++) { |
| 560 | hash = (hash << OCFS2_HASH_SHIFT) ^ |
| 561 | (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^ |
| 562 | *name++; |
| 563 | } |
| 564 | |
| 565 | return hash; |
| 566 | } |
| 567 | |
Tiger Yang | 534eadd | 2008-11-14 11:16:41 +0800 | [diff] [blame] | 568 | static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len) |
| 569 | { |
Joel Becker | 199799a | 2009-08-14 19:04:15 -0700 | [diff] [blame] | 570 | return namevalue_size(name_len, value_len) + |
| 571 | sizeof(struct ocfs2_xattr_entry); |
| 572 | } |
Tiger Yang | 534eadd | 2008-11-14 11:16:41 +0800 | [diff] [blame] | 573 | |
Joel Becker | 199799a | 2009-08-14 19:04:15 -0700 | [diff] [blame] | 574 | static int ocfs2_xi_entry_usage(struct ocfs2_xattr_info *xi) |
| 575 | { |
| 576 | return namevalue_size_xi(xi) + |
| 577 | sizeof(struct ocfs2_xattr_entry); |
| 578 | } |
Tiger Yang | 534eadd | 2008-11-14 11:16:41 +0800 | [diff] [blame] | 579 | |
Joel Becker | 199799a | 2009-08-14 19:04:15 -0700 | [diff] [blame] | 580 | static int ocfs2_xe_entry_usage(struct ocfs2_xattr_entry *xe) |
| 581 | { |
| 582 | return namevalue_size_xe(xe) + |
| 583 | sizeof(struct ocfs2_xattr_entry); |
Tiger Yang | 534eadd | 2008-11-14 11:16:41 +0800 | [diff] [blame] | 584 | } |
| 585 | |
| 586 | int ocfs2_calc_security_init(struct inode *dir, |
| 587 | struct ocfs2_security_xattr_info *si, |
| 588 | int *want_clusters, |
| 589 | int *xattr_credits, |
| 590 | struct ocfs2_alloc_context **xattr_ac) |
| 591 | { |
| 592 | int ret = 0; |
| 593 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); |
| 594 | int s_size = ocfs2_xattr_entry_real_size(strlen(si->name), |
| 595 | si->value_len); |
| 596 | |
| 597 | /* |
| 598 | * The max space of security xattr taken inline is |
| 599 | * 256(name) + 80(value) + 16(entry) = 352 bytes, |
| 600 | * So reserve one metadata block for it is ok. |
| 601 | */ |
| 602 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || |
| 603 | s_size > OCFS2_XATTR_FREE_IN_IBODY) { |
| 604 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac); |
| 605 | if (ret) { |
| 606 | mlog_errno(ret); |
| 607 | return ret; |
| 608 | } |
| 609 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
| 610 | } |
| 611 | |
| 612 | /* reserve clusters for xattr value which will be set in B tree*/ |
Tiger Yang | 0e445b6 | 2008-12-09 16:42:51 +0800 | [diff] [blame] | 613 | if (si->value_len > OCFS2_XATTR_INLINE_SIZE) { |
| 614 | int new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, |
| 615 | si->value_len); |
| 616 | |
| 617 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, |
| 618 | new_clusters); |
| 619 | *want_clusters += new_clusters; |
| 620 | } |
Tiger Yang | 534eadd | 2008-11-14 11:16:41 +0800 | [diff] [blame] | 621 | return ret; |
| 622 | } |
| 623 | |
Tiger Yang | 89c38bd | 2008-11-14 11:17:41 +0800 | [diff] [blame] | 624 | int ocfs2_calc_xattr_init(struct inode *dir, |
| 625 | struct buffer_head *dir_bh, |
| 626 | int mode, |
| 627 | struct ocfs2_security_xattr_info *si, |
| 628 | int *want_clusters, |
| 629 | int *xattr_credits, |
Mark Fasheh | 9b7895e | 2008-11-12 16:27:44 -0800 | [diff] [blame] | 630 | int *want_meta) |
Tiger Yang | 89c38bd | 2008-11-14 11:17:41 +0800 | [diff] [blame] | 631 | { |
| 632 | int ret = 0; |
| 633 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); |
Tiger Yang | 0e445b6 | 2008-12-09 16:42:51 +0800 | [diff] [blame] | 634 | int s_size = 0, a_size = 0, acl_len = 0, new_clusters; |
Tiger Yang | 89c38bd | 2008-11-14 11:17:41 +0800 | [diff] [blame] | 635 | |
| 636 | if (si->enable) |
| 637 | s_size = ocfs2_xattr_entry_real_size(strlen(si->name), |
| 638 | si->value_len); |
| 639 | |
| 640 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) { |
| 641 | acl_len = ocfs2_xattr_get_nolock(dir, dir_bh, |
| 642 | OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT, |
| 643 | "", NULL, 0); |
| 644 | if (acl_len > 0) { |
| 645 | a_size = ocfs2_xattr_entry_real_size(0, acl_len); |
| 646 | if (S_ISDIR(mode)) |
| 647 | a_size <<= 1; |
| 648 | } else if (acl_len != 0 && acl_len != -ENODATA) { |
| 649 | mlog_errno(ret); |
| 650 | return ret; |
| 651 | } |
| 652 | } |
| 653 | |
| 654 | if (!(s_size + a_size)) |
| 655 | return ret; |
| 656 | |
| 657 | /* |
| 658 | * The max space of security xattr taken inline is |
| 659 | * 256(name) + 80(value) + 16(entry) = 352 bytes, |
| 660 | * The max space of acl xattr taken inline is |
| 661 | * 80(value) + 16(entry) * 2(if directory) = 192 bytes, |
| 662 | * when blocksize = 512, may reserve one more cluser for |
| 663 | * xattr bucket, otherwise reserve one metadata block |
| 664 | * for them is ok. |
Tiger Yang | 6c9fd1d | 2009-03-06 10:19:30 +0800 | [diff] [blame] | 665 | * If this is a new directory with inline data, |
| 666 | * we choose to reserve the entire inline area for |
| 667 | * directory contents and force an external xattr block. |
Tiger Yang | 89c38bd | 2008-11-14 11:17:41 +0800 | [diff] [blame] | 668 | */ |
| 669 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || |
Tiger Yang | 6c9fd1d | 2009-03-06 10:19:30 +0800 | [diff] [blame] | 670 | (S_ISDIR(mode) && ocfs2_supports_inline_data(osb)) || |
Tiger Yang | 89c38bd | 2008-11-14 11:17:41 +0800 | [diff] [blame] | 671 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) { |
Mark Fasheh | 9b7895e | 2008-11-12 16:27:44 -0800 | [diff] [blame] | 672 | *want_meta = *want_meta + 1; |
Tiger Yang | 89c38bd | 2008-11-14 11:17:41 +0800 | [diff] [blame] | 673 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
| 674 | } |
| 675 | |
| 676 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE && |
| 677 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) { |
| 678 | *want_clusters += 1; |
| 679 | *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb); |
| 680 | } |
| 681 | |
Tiger Yang | 0e445b6 | 2008-12-09 16:42:51 +0800 | [diff] [blame] | 682 | /* |
| 683 | * reserve credits and clusters for xattrs which has large value |
| 684 | * and have to be set outside |
| 685 | */ |
| 686 | if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE) { |
| 687 | new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, |
| 688 | si->value_len); |
| 689 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, |
| 690 | new_clusters); |
| 691 | *want_clusters += new_clusters; |
| 692 | } |
Tiger Yang | 89c38bd | 2008-11-14 11:17:41 +0800 | [diff] [blame] | 693 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL && |
| 694 | acl_len > OCFS2_XATTR_INLINE_SIZE) { |
Tiger Yang | 0e445b6 | 2008-12-09 16:42:51 +0800 | [diff] [blame] | 695 | /* for directory, it has DEFAULT and ACCESS two types of acls */ |
| 696 | new_clusters = (S_ISDIR(mode) ? 2 : 1) * |
| 697 | ocfs2_clusters_for_bytes(dir->i_sb, acl_len); |
| 698 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, |
| 699 | new_clusters); |
| 700 | *want_clusters += new_clusters; |
Tiger Yang | 89c38bd | 2008-11-14 11:17:41 +0800 | [diff] [blame] | 701 | } |
| 702 | |
| 703 | return ret; |
| 704 | } |
| 705 | |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 706 | static int ocfs2_xattr_extend_allocation(struct inode *inode, |
| 707 | u32 clusters_to_add, |
Joel Becker | 19b801f | 2008-12-09 14:36:50 -0800 | [diff] [blame] | 708 | struct ocfs2_xattr_value_buf *vb, |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 709 | struct ocfs2_xattr_set_ctxt *ctxt) |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 710 | { |
Tao Ma | a78f9f4 | 2010-07-09 14:53:11 +0800 | [diff] [blame] | 711 | int status = 0, credits; |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 712 | handle_t *handle = ctxt->handle; |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 713 | enum ocfs2_alloc_restarted why; |
Joel Becker | 19b801f | 2008-12-09 14:36:50 -0800 | [diff] [blame] | 714 | u32 prev_clusters, logical_start = le32_to_cpu(vb->vb_xv->xr_clusters); |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 715 | struct ocfs2_extent_tree et; |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 716 | |
Joel Becker | 5e404e9 | 2009-02-13 03:54:22 -0800 | [diff] [blame] | 717 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 718 | |
Tao Ma | a78f9f4 | 2010-07-09 14:53:11 +0800 | [diff] [blame] | 719 | while (clusters_to_add) { |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 720 | trace_ocfs2_xattr_extend_allocation(clusters_to_add); |
| 721 | |
Tao Ma | a78f9f4 | 2010-07-09 14:53:11 +0800 | [diff] [blame] | 722 | status = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
| 723 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 724 | if (status < 0) { |
| 725 | mlog_errno(status); |
| 726 | break; |
| 727 | } |
| 728 | |
| 729 | prev_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
| 730 | status = ocfs2_add_clusters_in_btree(handle, |
| 731 | &et, |
| 732 | &logical_start, |
| 733 | clusters_to_add, |
| 734 | 0, |
| 735 | ctxt->data_ac, |
| 736 | ctxt->meta_ac, |
| 737 | &why); |
| 738 | if ((status < 0) && (status != -EAGAIN)) { |
| 739 | if (status != -ENOSPC) |
| 740 | mlog_errno(status); |
| 741 | break; |
| 742 | } |
| 743 | |
| 744 | ocfs2_journal_dirty(handle, vb->vb_bh); |
| 745 | |
| 746 | clusters_to_add -= le32_to_cpu(vb->vb_xv->xr_clusters) - |
| 747 | prev_clusters; |
| 748 | |
| 749 | if (why != RESTART_NONE && clusters_to_add) { |
| 750 | /* |
| 751 | * We can only fail in case the alloc file doesn't give |
| 752 | * up enough clusters. |
| 753 | */ |
| 754 | BUG_ON(why == RESTART_META); |
| 755 | |
Tao Ma | a78f9f4 | 2010-07-09 14:53:11 +0800 | [diff] [blame] | 756 | credits = ocfs2_calc_extend_credits(inode->i_sb, |
| 757 | &vb->vb_xv->xr_list, |
| 758 | clusters_to_add); |
| 759 | status = ocfs2_extend_trans(handle, credits); |
| 760 | if (status < 0) { |
| 761 | status = -ENOMEM; |
| 762 | mlog_errno(status); |
| 763 | break; |
| 764 | } |
| 765 | } |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 766 | } |
| 767 | |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 768 | return status; |
| 769 | } |
| 770 | |
| 771 | static int __ocfs2_remove_xattr_range(struct inode *inode, |
Joel Becker | d72cc72 | 2008-12-09 14:30:41 -0800 | [diff] [blame] | 772 | struct ocfs2_xattr_value_buf *vb, |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 773 | u32 cpos, u32 phys_cpos, u32 len, |
Tao Ma | 492a8a3 | 2009-08-18 11:43:17 +0800 | [diff] [blame] | 774 | unsigned int ext_flags, |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 775 | struct ocfs2_xattr_set_ctxt *ctxt) |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 776 | { |
| 777 | int ret; |
| 778 | u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 779 | handle_t *handle = ctxt->handle; |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 780 | struct ocfs2_extent_tree et; |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 781 | |
Joel Becker | 5e404e9 | 2009-02-13 03:54:22 -0800 | [diff] [blame] | 782 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 783 | |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 784 | ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
Joel Becker | d72cc72 | 2008-12-09 14:30:41 -0800 | [diff] [blame] | 785 | OCFS2_JOURNAL_ACCESS_WRITE); |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 786 | if (ret) { |
| 787 | mlog_errno(ret); |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 788 | goto out; |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 789 | } |
| 790 | |
Joel Becker | dbdcf6a | 2009-02-13 03:41:26 -0800 | [diff] [blame] | 791 | ret = ocfs2_remove_extent(handle, &et, cpos, len, ctxt->meta_ac, |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 792 | &ctxt->dealloc); |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 793 | if (ret) { |
| 794 | mlog_errno(ret); |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 795 | goto out; |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 796 | } |
| 797 | |
Joel Becker | d72cc72 | 2008-12-09 14:30:41 -0800 | [diff] [blame] | 798 | le32_add_cpu(&vb->vb_xv->xr_clusters, -len); |
Joel Becker | ec20cec | 2010-03-19 14:13:52 -0700 | [diff] [blame] | 799 | ocfs2_journal_dirty(handle, vb->vb_bh); |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 800 | |
Tao Ma | 492a8a3 | 2009-08-18 11:43:17 +0800 | [diff] [blame] | 801 | if (ext_flags & OCFS2_EXT_REFCOUNTED) |
| 802 | ret = ocfs2_decrease_refcount(inode, handle, |
| 803 | ocfs2_blocks_to_clusters(inode->i_sb, |
| 804 | phys_blkno), |
| 805 | len, ctxt->meta_ac, &ctxt->dealloc, 1); |
| 806 | else |
| 807 | ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc, |
| 808 | phys_blkno, len); |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 809 | if (ret) |
| 810 | mlog_errno(ret); |
| 811 | |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 812 | out: |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 813 | return ret; |
| 814 | } |
| 815 | |
| 816 | static int ocfs2_xattr_shrink_size(struct inode *inode, |
| 817 | u32 old_clusters, |
| 818 | u32 new_clusters, |
Joel Becker | 19b801f | 2008-12-09 14:36:50 -0800 | [diff] [blame] | 819 | struct ocfs2_xattr_value_buf *vb, |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 820 | struct ocfs2_xattr_set_ctxt *ctxt) |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 821 | { |
| 822 | int ret = 0; |
Tao Ma | 492a8a3 | 2009-08-18 11:43:17 +0800 | [diff] [blame] | 823 | unsigned int ext_flags; |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 824 | u32 trunc_len, cpos, phys_cpos, alloc_size; |
| 825 | u64 block; |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 826 | |
| 827 | if (old_clusters <= new_clusters) |
| 828 | return 0; |
| 829 | |
| 830 | cpos = new_clusters; |
| 831 | trunc_len = old_clusters - new_clusters; |
| 832 | while (trunc_len) { |
| 833 | ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos, |
Joel Becker | d72cc72 | 2008-12-09 14:30:41 -0800 | [diff] [blame] | 834 | &alloc_size, |
Tao Ma | 492a8a3 | 2009-08-18 11:43:17 +0800 | [diff] [blame] | 835 | &vb->vb_xv->xr_list, &ext_flags); |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 836 | if (ret) { |
| 837 | mlog_errno(ret); |
| 838 | goto out; |
| 839 | } |
| 840 | |
| 841 | if (alloc_size > trunc_len) |
| 842 | alloc_size = trunc_len; |
| 843 | |
Joel Becker | 19b801f | 2008-12-09 14:36:50 -0800 | [diff] [blame] | 844 | ret = __ocfs2_remove_xattr_range(inode, vb, cpos, |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 845 | phys_cpos, alloc_size, |
Tao Ma | 492a8a3 | 2009-08-18 11:43:17 +0800 | [diff] [blame] | 846 | ext_flags, ctxt); |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 847 | if (ret) { |
| 848 | mlog_errno(ret); |
| 849 | goto out; |
| 850 | } |
| 851 | |
| 852 | block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); |
Joel Becker | 8cb471e | 2009-02-10 20:00:41 -0800 | [diff] [blame] | 853 | ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), |
| 854 | block, alloc_size); |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 855 | cpos += alloc_size; |
| 856 | trunc_len -= alloc_size; |
| 857 | } |
| 858 | |
| 859 | out: |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 860 | return ret; |
| 861 | } |
| 862 | |
| 863 | static int ocfs2_xattr_value_truncate(struct inode *inode, |
Joel Becker | b3e5d37 | 2008-12-09 15:01:04 -0800 | [diff] [blame] | 864 | struct ocfs2_xattr_value_buf *vb, |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 865 | int len, |
| 866 | struct ocfs2_xattr_set_ctxt *ctxt) |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 867 | { |
| 868 | int ret; |
| 869 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len); |
Joel Becker | b3e5d37 | 2008-12-09 15:01:04 -0800 | [diff] [blame] | 870 | u32 old_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 871 | |
| 872 | if (new_clusters == old_clusters) |
| 873 | return 0; |
| 874 | |
| 875 | if (new_clusters > old_clusters) |
| 876 | ret = ocfs2_xattr_extend_allocation(inode, |
| 877 | new_clusters - old_clusters, |
Joel Becker | b3e5d37 | 2008-12-09 15:01:04 -0800 | [diff] [blame] | 878 | vb, ctxt); |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 879 | else |
| 880 | ret = ocfs2_xattr_shrink_size(inode, |
| 881 | old_clusters, new_clusters, |
Joel Becker | b3e5d37 | 2008-12-09 15:01:04 -0800 | [diff] [blame] | 882 | vb, ctxt); |
Tao Ma | f56654c | 2008-08-18 17:38:48 +0800 | [diff] [blame] | 883 | |
| 884 | return ret; |
| 885 | } |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 886 | |
Tao Ma | 936b883 | 2008-10-09 23:06:14 +0800 | [diff] [blame] | 887 | static int ocfs2_xattr_list_entry(char *buffer, size_t size, |
| 888 | size_t *result, const char *prefix, |
| 889 | const char *name, int name_len) |
| 890 | { |
| 891 | char *p = buffer + *result; |
| 892 | int prefix_len = strlen(prefix); |
| 893 | int total_len = prefix_len + name_len + 1; |
| 894 | |
| 895 | *result += total_len; |
| 896 | |
| 897 | /* we are just looking for how big our buffer needs to be */ |
| 898 | if (!size) |
| 899 | return 0; |
| 900 | |
| 901 | if (*result > size) |
| 902 | return -ERANGE; |
| 903 | |
| 904 | memcpy(p, prefix, prefix_len); |
| 905 | memcpy(p + prefix_len, name, name_len); |
| 906 | p[prefix_len + name_len] = '\0'; |
| 907 | |
| 908 | return 0; |
| 909 | } |
| 910 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 911 | static int ocfs2_xattr_list_entries(struct inode *inode, |
| 912 | struct ocfs2_xattr_header *header, |
| 913 | char *buffer, size_t buffer_size) |
| 914 | { |
Tao Ma | 936b883 | 2008-10-09 23:06:14 +0800 | [diff] [blame] | 915 | size_t result = 0; |
| 916 | int i, type, ret; |
| 917 | const char *prefix, *name; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 918 | |
| 919 | for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) { |
| 920 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; |
Tao Ma | 936b883 | 2008-10-09 23:06:14 +0800 | [diff] [blame] | 921 | type = ocfs2_xattr_get_type(entry); |
| 922 | prefix = ocfs2_xattr_prefix(type); |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 923 | |
Tao Ma | 936b883 | 2008-10-09 23:06:14 +0800 | [diff] [blame] | 924 | if (prefix) { |
| 925 | name = (const char *)header + |
| 926 | le16_to_cpu(entry->xe_name_offset); |
| 927 | |
| 928 | ret = ocfs2_xattr_list_entry(buffer, buffer_size, |
| 929 | &result, prefix, name, |
| 930 | entry->xe_name_len); |
| 931 | if (ret) |
| 932 | return ret; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 933 | } |
| 934 | } |
| 935 | |
Tao Ma | 936b883 | 2008-10-09 23:06:14 +0800 | [diff] [blame] | 936 | return result; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 937 | } |
| 938 | |
Tao Ma | 8b2c0db | 2009-08-18 11:43:49 +0800 | [diff] [blame] | 939 | int ocfs2_has_inline_xattr_value_outside(struct inode *inode, |
| 940 | struct ocfs2_dinode *di) |
| 941 | { |
| 942 | struct ocfs2_xattr_header *xh; |
| 943 | int i; |
| 944 | |
| 945 | xh = (struct ocfs2_xattr_header *) |
| 946 | ((void *)di + inode->i_sb->s_blocksize - |
| 947 | le16_to_cpu(di->i_xattr_inline_size)); |
| 948 | |
| 949 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) |
| 950 | if (!ocfs2_xattr_is_local(&xh->xh_entries[i])) |
| 951 | return 1; |
| 952 | |
| 953 | return 0; |
| 954 | } |
| 955 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 956 | static int ocfs2_xattr_ibody_list(struct inode *inode, |
| 957 | struct ocfs2_dinode *di, |
| 958 | char *buffer, |
| 959 | size_t buffer_size) |
| 960 | { |
| 961 | struct ocfs2_xattr_header *header = NULL; |
| 962 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 963 | int ret = 0; |
| 964 | |
| 965 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) |
| 966 | return ret; |
| 967 | |
| 968 | header = (struct ocfs2_xattr_header *) |
| 969 | ((void *)di + inode->i_sb->s_blocksize - |
| 970 | le16_to_cpu(di->i_xattr_inline_size)); |
| 971 | |
| 972 | ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size); |
| 973 | |
| 974 | return ret; |
| 975 | } |
| 976 | |
| 977 | static int ocfs2_xattr_block_list(struct inode *inode, |
| 978 | struct ocfs2_dinode *di, |
| 979 | char *buffer, |
| 980 | size_t buffer_size) |
| 981 | { |
| 982 | struct buffer_head *blk_bh = NULL; |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 983 | struct ocfs2_xattr_block *xb; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 984 | int ret = 0; |
| 985 | |
| 986 | if (!di->i_xattr_loc) |
| 987 | return ret; |
| 988 | |
Joel Becker | 4ae1d69 | 2008-11-13 14:49:18 -0800 | [diff] [blame] | 989 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
| 990 | &blk_bh); |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 991 | if (ret < 0) { |
| 992 | mlog_errno(ret); |
| 993 | return ret; |
| 994 | } |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 995 | |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 996 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 997 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
| 998 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; |
| 999 | ret = ocfs2_xattr_list_entries(inode, header, |
| 1000 | buffer, buffer_size); |
Tao Ma | 47bca49 | 2009-08-18 11:43:42 +0800 | [diff] [blame] | 1001 | } else |
| 1002 | ret = ocfs2_xattr_tree_list_index_block(inode, blk_bh, |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 1003 | buffer, buffer_size); |
Joel Becker | 4ae1d69 | 2008-11-13 14:49:18 -0800 | [diff] [blame] | 1004 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1005 | brelse(blk_bh); |
| 1006 | |
| 1007 | return ret; |
| 1008 | } |
| 1009 | |
| 1010 | ssize_t ocfs2_listxattr(struct dentry *dentry, |
| 1011 | char *buffer, |
| 1012 | size_t size) |
| 1013 | { |
| 1014 | int ret = 0, i_ret = 0, b_ret = 0; |
| 1015 | struct buffer_head *di_bh = NULL; |
| 1016 | struct ocfs2_dinode *di = NULL; |
| 1017 | struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode); |
| 1018 | |
Tiger Yang | 8154da3 | 2008-08-18 17:11:46 +0800 | [diff] [blame] | 1019 | if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb))) |
| 1020 | return -EOPNOTSUPP; |
| 1021 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1022 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
| 1023 | return ret; |
| 1024 | |
| 1025 | ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0); |
| 1026 | if (ret < 0) { |
| 1027 | mlog_errno(ret); |
| 1028 | return ret; |
| 1029 | } |
| 1030 | |
| 1031 | di = (struct ocfs2_dinode *)di_bh->b_data; |
| 1032 | |
| 1033 | down_read(&oi->ip_xattr_sem); |
| 1034 | i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size); |
| 1035 | if (i_ret < 0) |
| 1036 | b_ret = 0; |
| 1037 | else { |
| 1038 | if (buffer) { |
| 1039 | buffer += i_ret; |
| 1040 | size -= i_ret; |
| 1041 | } |
| 1042 | b_ret = ocfs2_xattr_block_list(dentry->d_inode, di, |
| 1043 | buffer, size); |
| 1044 | if (b_ret < 0) |
| 1045 | i_ret = 0; |
| 1046 | } |
| 1047 | up_read(&oi->ip_xattr_sem); |
| 1048 | ocfs2_inode_unlock(dentry->d_inode, 0); |
| 1049 | |
| 1050 | brelse(di_bh); |
| 1051 | |
| 1052 | return i_ret + b_ret; |
| 1053 | } |
| 1054 | |
| 1055 | static int ocfs2_xattr_find_entry(int name_index, |
| 1056 | const char *name, |
| 1057 | struct ocfs2_xattr_search *xs) |
| 1058 | { |
| 1059 | struct ocfs2_xattr_entry *entry; |
| 1060 | size_t name_len; |
| 1061 | int i, cmp = 1; |
| 1062 | |
| 1063 | if (name == NULL) |
| 1064 | return -EINVAL; |
| 1065 | |
| 1066 | name_len = strlen(name); |
| 1067 | entry = xs->here; |
| 1068 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { |
| 1069 | cmp = name_index - ocfs2_xattr_get_type(entry); |
| 1070 | if (!cmp) |
| 1071 | cmp = name_len - entry->xe_name_len; |
| 1072 | if (!cmp) |
| 1073 | cmp = memcmp(name, (xs->base + |
| 1074 | le16_to_cpu(entry->xe_name_offset)), |
| 1075 | name_len); |
| 1076 | if (cmp == 0) |
| 1077 | break; |
| 1078 | entry += 1; |
| 1079 | } |
| 1080 | xs->here = entry; |
| 1081 | |
| 1082 | return cmp ? -ENODATA : 0; |
| 1083 | } |
| 1084 | |
| 1085 | static int ocfs2_xattr_get_value_outside(struct inode *inode, |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 1086 | struct ocfs2_xattr_value_root *xv, |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1087 | void *buffer, |
| 1088 | size_t len) |
| 1089 | { |
| 1090 | u32 cpos, p_cluster, num_clusters, bpc, clusters; |
| 1091 | u64 blkno; |
| 1092 | int i, ret = 0; |
| 1093 | size_t cplen, blocksize; |
| 1094 | struct buffer_head *bh = NULL; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1095 | struct ocfs2_extent_list *el; |
| 1096 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1097 | el = &xv->xr_list; |
| 1098 | clusters = le32_to_cpu(xv->xr_clusters); |
| 1099 | bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); |
| 1100 | blocksize = inode->i_sb->s_blocksize; |
| 1101 | |
| 1102 | cpos = 0; |
| 1103 | while (cpos < clusters) { |
| 1104 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, |
Tao Ma | 1061f9c | 2009-08-18 11:41:57 +0800 | [diff] [blame] | 1105 | &num_clusters, el, NULL); |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1106 | if (ret) { |
| 1107 | mlog_errno(ret); |
| 1108 | goto out; |
| 1109 | } |
| 1110 | |
| 1111 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); |
| 1112 | /* Copy ocfs2_xattr_value */ |
| 1113 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { |
Joel Becker | 8cb471e | 2009-02-10 20:00:41 -0800 | [diff] [blame] | 1114 | ret = ocfs2_read_block(INODE_CACHE(inode), blkno, |
| 1115 | &bh, NULL); |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1116 | if (ret) { |
| 1117 | mlog_errno(ret); |
| 1118 | goto out; |
| 1119 | } |
| 1120 | |
| 1121 | cplen = len >= blocksize ? blocksize : len; |
| 1122 | memcpy(buffer, bh->b_data, cplen); |
| 1123 | len -= cplen; |
| 1124 | buffer += cplen; |
| 1125 | |
| 1126 | brelse(bh); |
| 1127 | bh = NULL; |
| 1128 | if (len == 0) |
| 1129 | break; |
| 1130 | } |
| 1131 | cpos += num_clusters; |
| 1132 | } |
| 1133 | out: |
| 1134 | return ret; |
| 1135 | } |
| 1136 | |
| 1137 | static int ocfs2_xattr_ibody_get(struct inode *inode, |
| 1138 | int name_index, |
| 1139 | const char *name, |
| 1140 | void *buffer, |
| 1141 | size_t buffer_size, |
| 1142 | struct ocfs2_xattr_search *xs) |
| 1143 | { |
| 1144 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 1145 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 1146 | struct ocfs2_xattr_value_root *xv; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1147 | size_t size; |
| 1148 | int ret = 0; |
| 1149 | |
| 1150 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) |
| 1151 | return -ENODATA; |
| 1152 | |
| 1153 | xs->end = (void *)di + inode->i_sb->s_blocksize; |
| 1154 | xs->header = (struct ocfs2_xattr_header *) |
| 1155 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); |
| 1156 | xs->base = (void *)xs->header; |
| 1157 | xs->here = xs->header->xh_entries; |
| 1158 | |
| 1159 | ret = ocfs2_xattr_find_entry(name_index, name, xs); |
| 1160 | if (ret) |
| 1161 | return ret; |
| 1162 | size = le64_to_cpu(xs->here->xe_value_size); |
| 1163 | if (buffer) { |
| 1164 | if (size > buffer_size) |
| 1165 | return -ERANGE; |
| 1166 | if (ocfs2_xattr_is_local(xs->here)) { |
| 1167 | memcpy(buffer, (void *)xs->base + |
| 1168 | le16_to_cpu(xs->here->xe_name_offset) + |
| 1169 | OCFS2_XATTR_SIZE(xs->here->xe_name_len), size); |
| 1170 | } else { |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 1171 | xv = (struct ocfs2_xattr_value_root *) |
| 1172 | (xs->base + le16_to_cpu( |
| 1173 | xs->here->xe_name_offset) + |
| 1174 | OCFS2_XATTR_SIZE(xs->here->xe_name_len)); |
| 1175 | ret = ocfs2_xattr_get_value_outside(inode, xv, |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1176 | buffer, size); |
| 1177 | if (ret < 0) { |
| 1178 | mlog_errno(ret); |
| 1179 | return ret; |
| 1180 | } |
| 1181 | } |
| 1182 | } |
| 1183 | |
| 1184 | return size; |
| 1185 | } |
| 1186 | |
| 1187 | static int ocfs2_xattr_block_get(struct inode *inode, |
| 1188 | int name_index, |
| 1189 | const char *name, |
| 1190 | void *buffer, |
| 1191 | size_t buffer_size, |
| 1192 | struct ocfs2_xattr_search *xs) |
| 1193 | { |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1194 | struct ocfs2_xattr_block *xb; |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 1195 | struct ocfs2_xattr_value_root *xv; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1196 | size_t size; |
Subrata Modak | 44d8e4e | 2009-07-14 01:19:31 +0530 | [diff] [blame] | 1197 | int ret = -ENODATA, name_offset, name_len, i; |
| 1198 | int uninitialized_var(block_off); |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1199 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 1200 | xs->bucket = ocfs2_xattr_bucket_new(inode); |
| 1201 | if (!xs->bucket) { |
| 1202 | ret = -ENOMEM; |
| 1203 | mlog_errno(ret); |
| 1204 | goto cleanup; |
| 1205 | } |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 1206 | |
Joel Becker | 54f443f | 2008-10-20 18:43:07 -0700 | [diff] [blame] | 1207 | ret = ocfs2_xattr_block_find(inode, name_index, name, xs); |
| 1208 | if (ret) { |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1209 | mlog_errno(ret); |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1210 | goto cleanup; |
| 1211 | } |
| 1212 | |
Tiger Yang | 6c1e183 | 2008-11-02 19:04:21 +0800 | [diff] [blame] | 1213 | if (xs->not_found) { |
| 1214 | ret = -ENODATA; |
| 1215 | goto cleanup; |
| 1216 | } |
| 1217 | |
Joel Becker | 54f443f | 2008-10-20 18:43:07 -0700 | [diff] [blame] | 1218 | xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1219 | size = le64_to_cpu(xs->here->xe_value_size); |
| 1220 | if (buffer) { |
| 1221 | ret = -ERANGE; |
| 1222 | if (size > buffer_size) |
| 1223 | goto cleanup; |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 1224 | |
| 1225 | name_offset = le16_to_cpu(xs->here->xe_name_offset); |
| 1226 | name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len); |
| 1227 | i = xs->here - xs->header->xh_entries; |
| 1228 | |
| 1229 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { |
Tao Ma | fd68a89 | 2009-08-18 11:43:21 +0800 | [diff] [blame] | 1230 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 1231 | bucket_xh(xs->bucket), |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 1232 | i, |
| 1233 | &block_off, |
| 1234 | &name_offset); |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 1235 | xs->base = bucket_block(xs->bucket, block_off); |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 1236 | } |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1237 | if (ocfs2_xattr_is_local(xs->here)) { |
| 1238 | memcpy(buffer, (void *)xs->base + |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 1239 | name_offset + name_len, size); |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1240 | } else { |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 1241 | xv = (struct ocfs2_xattr_value_root *) |
| 1242 | (xs->base + name_offset + name_len); |
| 1243 | ret = ocfs2_xattr_get_value_outside(inode, xv, |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1244 | buffer, size); |
| 1245 | if (ret < 0) { |
| 1246 | mlog_errno(ret); |
| 1247 | goto cleanup; |
| 1248 | } |
| 1249 | } |
| 1250 | } |
| 1251 | ret = size; |
| 1252 | cleanup: |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 1253 | ocfs2_xattr_bucket_free(xs->bucket); |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1254 | |
Joel Becker | 54f443f | 2008-10-20 18:43:07 -0700 | [diff] [blame] | 1255 | brelse(xs->xattr_bh); |
| 1256 | xs->xattr_bh = NULL; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1257 | return ret; |
| 1258 | } |
| 1259 | |
Tiger Yang | 4e3e9d0 | 2008-11-14 11:16:53 +0800 | [diff] [blame] | 1260 | int ocfs2_xattr_get_nolock(struct inode *inode, |
| 1261 | struct buffer_head *di_bh, |
Tiger Yang | 0030e00 | 2008-10-23 16:33:33 +0800 | [diff] [blame] | 1262 | int name_index, |
| 1263 | const char *name, |
| 1264 | void *buffer, |
| 1265 | size_t buffer_size) |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1266 | { |
| 1267 | int ret; |
| 1268 | struct ocfs2_dinode *di = NULL; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1269 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 1270 | struct ocfs2_xattr_search xis = { |
| 1271 | .not_found = -ENODATA, |
| 1272 | }; |
| 1273 | struct ocfs2_xattr_search xbs = { |
| 1274 | .not_found = -ENODATA, |
| 1275 | }; |
| 1276 | |
Tiger Yang | 8154da3 | 2008-08-18 17:11:46 +0800 | [diff] [blame] | 1277 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
| 1278 | return -EOPNOTSUPP; |
| 1279 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1280 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
| 1281 | ret = -ENODATA; |
| 1282 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1283 | xis.inode_bh = xbs.inode_bh = di_bh; |
| 1284 | di = (struct ocfs2_dinode *)di_bh->b_data; |
| 1285 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1286 | ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer, |
| 1287 | buffer_size, &xis); |
Tiger Yang | 6c1e183 | 2008-11-02 19:04:21 +0800 | [diff] [blame] | 1288 | if (ret == -ENODATA && di->i_xattr_loc) |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1289 | ret = ocfs2_xattr_block_get(inode, name_index, name, buffer, |
| 1290 | buffer_size, &xbs); |
Tiger Yang | 4e3e9d0 | 2008-11-14 11:16:53 +0800 | [diff] [blame] | 1291 | |
| 1292 | return ret; |
| 1293 | } |
| 1294 | |
| 1295 | /* ocfs2_xattr_get() |
| 1296 | * |
| 1297 | * Copy an extended attribute into the buffer provided. |
| 1298 | * Buffer is NULL to compute the size of buffer required. |
| 1299 | */ |
| 1300 | static int ocfs2_xattr_get(struct inode *inode, |
| 1301 | int name_index, |
| 1302 | const char *name, |
| 1303 | void *buffer, |
| 1304 | size_t buffer_size) |
| 1305 | { |
| 1306 | int ret; |
| 1307 | struct buffer_head *di_bh = NULL; |
| 1308 | |
| 1309 | ret = ocfs2_inode_lock(inode, &di_bh, 0); |
| 1310 | if (ret < 0) { |
| 1311 | mlog_errno(ret); |
| 1312 | return ret; |
| 1313 | } |
Tao Ma | 5e64b0d | 2010-09-07 13:30:05 +0800 | [diff] [blame] | 1314 | down_read(&OCFS2_I(inode)->ip_xattr_sem); |
Tiger Yang | 4e3e9d0 | 2008-11-14 11:16:53 +0800 | [diff] [blame] | 1315 | ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index, |
| 1316 | name, buffer, buffer_size); |
Tao Ma | 5e64b0d | 2010-09-07 13:30:05 +0800 | [diff] [blame] | 1317 | up_read(&OCFS2_I(inode)->ip_xattr_sem); |
Tiger Yang | 4e3e9d0 | 2008-11-14 11:16:53 +0800 | [diff] [blame] | 1318 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1319 | ocfs2_inode_unlock(inode, 0); |
| 1320 | |
| 1321 | brelse(di_bh); |
| 1322 | |
| 1323 | return ret; |
| 1324 | } |
| 1325 | |
| 1326 | static int __ocfs2_xattr_set_value_outside(struct inode *inode, |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 1327 | handle_t *handle, |
Tao Ma | 492a8a3 | 2009-08-18 11:43:17 +0800 | [diff] [blame] | 1328 | struct ocfs2_xattr_value_buf *vb, |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1329 | const void *value, |
| 1330 | int value_len) |
| 1331 | { |
Tao Ma | 71d548a | 2008-12-05 06:20:54 +0800 | [diff] [blame] | 1332 | int ret = 0, i, cp_len; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1333 | u16 blocksize = inode->i_sb->s_blocksize; |
| 1334 | u32 p_cluster, num_clusters; |
| 1335 | u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); |
| 1336 | u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len); |
| 1337 | u64 blkno; |
| 1338 | struct buffer_head *bh = NULL; |
Tao Ma | 492a8a3 | 2009-08-18 11:43:17 +0800 | [diff] [blame] | 1339 | unsigned int ext_flags; |
| 1340 | struct ocfs2_xattr_value_root *xv = vb->vb_xv; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1341 | |
| 1342 | BUG_ON(clusters > le32_to_cpu(xv->xr_clusters)); |
| 1343 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1344 | while (cpos < clusters) { |
| 1345 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, |
Tao Ma | 1061f9c | 2009-08-18 11:41:57 +0800 | [diff] [blame] | 1346 | &num_clusters, &xv->xr_list, |
Tao Ma | 492a8a3 | 2009-08-18 11:43:17 +0800 | [diff] [blame] | 1347 | &ext_flags); |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1348 | if (ret) { |
| 1349 | mlog_errno(ret); |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 1350 | goto out; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1351 | } |
| 1352 | |
Tao Ma | 492a8a3 | 2009-08-18 11:43:17 +0800 | [diff] [blame] | 1353 | BUG_ON(ext_flags & OCFS2_EXT_REFCOUNTED); |
| 1354 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1355 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); |
| 1356 | |
| 1357 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { |
Joel Becker | 8cb471e | 2009-02-10 20:00:41 -0800 | [diff] [blame] | 1358 | ret = ocfs2_read_block(INODE_CACHE(inode), blkno, |
| 1359 | &bh, NULL); |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1360 | if (ret) { |
| 1361 | mlog_errno(ret); |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 1362 | goto out; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1363 | } |
| 1364 | |
| 1365 | ret = ocfs2_journal_access(handle, |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 1366 | INODE_CACHE(inode), |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1367 | bh, |
| 1368 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 1369 | if (ret < 0) { |
| 1370 | mlog_errno(ret); |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 1371 | goto out; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1372 | } |
| 1373 | |
| 1374 | cp_len = value_len > blocksize ? blocksize : value_len; |
| 1375 | memcpy(bh->b_data, value, cp_len); |
| 1376 | value_len -= cp_len; |
| 1377 | value += cp_len; |
| 1378 | if (cp_len < blocksize) |
| 1379 | memset(bh->b_data + cp_len, 0, |
| 1380 | blocksize - cp_len); |
| 1381 | |
Joel Becker | ec20cec | 2010-03-19 14:13:52 -0700 | [diff] [blame] | 1382 | ocfs2_journal_dirty(handle, bh); |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1383 | brelse(bh); |
| 1384 | bh = NULL; |
| 1385 | |
| 1386 | /* |
| 1387 | * XXX: do we need to empty all the following |
| 1388 | * blocks in this cluster? |
| 1389 | */ |
| 1390 | if (!value_len) |
| 1391 | break; |
| 1392 | } |
| 1393 | cpos += num_clusters; |
| 1394 | } |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1395 | out: |
| 1396 | brelse(bh); |
| 1397 | |
| 1398 | return ret; |
| 1399 | } |
| 1400 | |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 1401 | static int ocfs2_xa_check_space_helper(int needed_space, int free_start, |
| 1402 | int num_entries) |
| 1403 | { |
| 1404 | int free_space; |
| 1405 | |
| 1406 | if (!needed_space) |
| 1407 | return 0; |
| 1408 | |
| 1409 | free_space = free_start - |
| 1410 | sizeof(struct ocfs2_xattr_header) - |
| 1411 | (num_entries * sizeof(struct ocfs2_xattr_entry)) - |
| 1412 | OCFS2_XATTR_HEADER_GAP; |
| 1413 | if (free_space < 0) |
| 1414 | return -EIO; |
| 1415 | if (free_space < needed_space) |
| 1416 | return -ENOSPC; |
| 1417 | |
| 1418 | return 0; |
| 1419 | } |
| 1420 | |
Joel Becker | cf2bc80 | 2009-08-18 13:52:38 -0700 | [diff] [blame] | 1421 | static int ocfs2_xa_journal_access(handle_t *handle, struct ocfs2_xa_loc *loc, |
| 1422 | int type) |
| 1423 | { |
| 1424 | return loc->xl_ops->xlo_journal_access(handle, loc, type); |
| 1425 | } |
| 1426 | |
| 1427 | static void ocfs2_xa_journal_dirty(handle_t *handle, struct ocfs2_xa_loc *loc) |
| 1428 | { |
| 1429 | loc->xl_ops->xlo_journal_dirty(handle, loc); |
| 1430 | } |
| 1431 | |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 1432 | /* Give a pointer into the storage for the given offset */ |
| 1433 | static void *ocfs2_xa_offset_pointer(struct ocfs2_xa_loc *loc, int offset) |
| 1434 | { |
| 1435 | BUG_ON(offset >= loc->xl_size); |
| 1436 | return loc->xl_ops->xlo_offset_pointer(loc, offset); |
| 1437 | } |
| 1438 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 1439 | /* |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 1440 | * Wipe the name+value pair and allow the storage to reclaim it. This |
| 1441 | * must be followed by either removal of the entry or a call to |
| 1442 | * ocfs2_xa_add_namevalue(). |
| 1443 | */ |
| 1444 | static void ocfs2_xa_wipe_namevalue(struct ocfs2_xa_loc *loc) |
| 1445 | { |
| 1446 | loc->xl_ops->xlo_wipe_namevalue(loc); |
| 1447 | } |
| 1448 | |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 1449 | /* |
| 1450 | * Find lowest offset to a name+value pair. This is the start of our |
| 1451 | * downward-growing free space. |
| 1452 | */ |
| 1453 | static int ocfs2_xa_get_free_start(struct ocfs2_xa_loc *loc) |
| 1454 | { |
| 1455 | return loc->xl_ops->xlo_get_free_start(loc); |
| 1456 | } |
| 1457 | |
| 1458 | /* Can we reuse loc->xl_entry for xi? */ |
| 1459 | static int ocfs2_xa_can_reuse_entry(struct ocfs2_xa_loc *loc, |
| 1460 | struct ocfs2_xattr_info *xi) |
| 1461 | { |
| 1462 | return loc->xl_ops->xlo_can_reuse(loc, xi); |
| 1463 | } |
| 1464 | |
| 1465 | /* How much free space is needed to set the new value */ |
| 1466 | static int ocfs2_xa_check_space(struct ocfs2_xa_loc *loc, |
| 1467 | struct ocfs2_xattr_info *xi) |
| 1468 | { |
| 1469 | return loc->xl_ops->xlo_check_space(loc, xi); |
| 1470 | } |
| 1471 | |
| 1472 | static void ocfs2_xa_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash) |
| 1473 | { |
| 1474 | loc->xl_ops->xlo_add_entry(loc, name_hash); |
| 1475 | loc->xl_entry->xe_name_hash = cpu_to_le32(name_hash); |
| 1476 | /* |
| 1477 | * We can't leave the new entry's xe_name_offset at zero or |
| 1478 | * add_namevalue() will go nuts. We set it to the size of our |
| 1479 | * storage so that it can never be less than any other entry. |
| 1480 | */ |
| 1481 | loc->xl_entry->xe_name_offset = cpu_to_le16(loc->xl_size); |
| 1482 | } |
| 1483 | |
| 1484 | static void ocfs2_xa_add_namevalue(struct ocfs2_xa_loc *loc, |
| 1485 | struct ocfs2_xattr_info *xi) |
| 1486 | { |
| 1487 | int size = namevalue_size_xi(xi); |
| 1488 | int nameval_offset; |
| 1489 | char *nameval_buf; |
| 1490 | |
| 1491 | loc->xl_ops->xlo_add_namevalue(loc, size); |
| 1492 | loc->xl_entry->xe_value_size = cpu_to_le64(xi->xi_value_len); |
| 1493 | loc->xl_entry->xe_name_len = xi->xi_name_len; |
| 1494 | ocfs2_xattr_set_type(loc->xl_entry, xi->xi_name_index); |
| 1495 | ocfs2_xattr_set_local(loc->xl_entry, |
| 1496 | xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE); |
| 1497 | |
| 1498 | nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset); |
| 1499 | nameval_buf = ocfs2_xa_offset_pointer(loc, nameval_offset); |
| 1500 | memset(nameval_buf, 0, size); |
| 1501 | memcpy(nameval_buf, xi->xi_name, xi->xi_name_len); |
| 1502 | } |
| 1503 | |
Joel Becker | 3fc12af | 2009-08-18 13:20:27 -0700 | [diff] [blame] | 1504 | static void ocfs2_xa_fill_value_buf(struct ocfs2_xa_loc *loc, |
| 1505 | struct ocfs2_xattr_value_buf *vb) |
| 1506 | { |
| 1507 | int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset); |
| 1508 | int name_size = OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len); |
| 1509 | |
| 1510 | /* Value bufs are for value trees */ |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 1511 | BUG_ON(ocfs2_xattr_is_local(loc->xl_entry)); |
Joel Becker | 3fc12af | 2009-08-18 13:20:27 -0700 | [diff] [blame] | 1512 | BUG_ON(namevalue_size_xe(loc->xl_entry) != |
| 1513 | (name_size + OCFS2_XATTR_ROOT_SIZE)); |
| 1514 | |
| 1515 | loc->xl_ops->xlo_fill_value_buf(loc, vb); |
| 1516 | vb->vb_xv = |
| 1517 | (struct ocfs2_xattr_value_root *)ocfs2_xa_offset_pointer(loc, |
| 1518 | nameval_offset + |
| 1519 | name_size); |
| 1520 | } |
| 1521 | |
Joel Becker | cf2bc80 | 2009-08-18 13:52:38 -0700 | [diff] [blame] | 1522 | static int ocfs2_xa_block_journal_access(handle_t *handle, |
| 1523 | struct ocfs2_xa_loc *loc, int type) |
| 1524 | { |
| 1525 | struct buffer_head *bh = loc->xl_storage; |
| 1526 | ocfs2_journal_access_func access; |
| 1527 | |
| 1528 | if (loc->xl_size == (bh->b_size - |
| 1529 | offsetof(struct ocfs2_xattr_block, |
| 1530 | xb_attrs.xb_header))) |
| 1531 | access = ocfs2_journal_access_xb; |
| 1532 | else |
| 1533 | access = ocfs2_journal_access_di; |
| 1534 | return access(handle, INODE_CACHE(loc->xl_inode), bh, type); |
| 1535 | } |
| 1536 | |
| 1537 | static void ocfs2_xa_block_journal_dirty(handle_t *handle, |
| 1538 | struct ocfs2_xa_loc *loc) |
| 1539 | { |
| 1540 | struct buffer_head *bh = loc->xl_storage; |
| 1541 | |
| 1542 | ocfs2_journal_dirty(handle, bh); |
| 1543 | } |
| 1544 | |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 1545 | static void *ocfs2_xa_block_offset_pointer(struct ocfs2_xa_loc *loc, |
| 1546 | int offset) |
| 1547 | { |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 1548 | return (char *)loc->xl_header + offset; |
| 1549 | } |
| 1550 | |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 1551 | static int ocfs2_xa_block_can_reuse(struct ocfs2_xa_loc *loc, |
| 1552 | struct ocfs2_xattr_info *xi) |
| 1553 | { |
| 1554 | /* |
| 1555 | * Block storage is strict. If the sizes aren't exact, we will |
| 1556 | * remove the old one and reinsert the new. |
| 1557 | */ |
| 1558 | return namevalue_size_xe(loc->xl_entry) == |
| 1559 | namevalue_size_xi(xi); |
| 1560 | } |
| 1561 | |
| 1562 | static int ocfs2_xa_block_get_free_start(struct ocfs2_xa_loc *loc) |
| 1563 | { |
| 1564 | struct ocfs2_xattr_header *xh = loc->xl_header; |
| 1565 | int i, count = le16_to_cpu(xh->xh_count); |
| 1566 | int offset, free_start = loc->xl_size; |
| 1567 | |
| 1568 | for (i = 0; i < count; i++) { |
| 1569 | offset = le16_to_cpu(xh->xh_entries[i].xe_name_offset); |
| 1570 | if (offset < free_start) |
| 1571 | free_start = offset; |
| 1572 | } |
| 1573 | |
| 1574 | return free_start; |
| 1575 | } |
| 1576 | |
| 1577 | static int ocfs2_xa_block_check_space(struct ocfs2_xa_loc *loc, |
| 1578 | struct ocfs2_xattr_info *xi) |
| 1579 | { |
| 1580 | int count = le16_to_cpu(loc->xl_header->xh_count); |
| 1581 | int free_start = ocfs2_xa_get_free_start(loc); |
| 1582 | int needed_space = ocfs2_xi_entry_usage(xi); |
| 1583 | |
| 1584 | /* |
| 1585 | * Block storage will reclaim the original entry before inserting |
| 1586 | * the new value, so we only need the difference. If the new |
| 1587 | * entry is smaller than the old one, we don't need anything. |
| 1588 | */ |
| 1589 | if (loc->xl_entry) { |
| 1590 | /* Don't need space if we're reusing! */ |
| 1591 | if (ocfs2_xa_can_reuse_entry(loc, xi)) |
| 1592 | needed_space = 0; |
| 1593 | else |
| 1594 | needed_space -= ocfs2_xe_entry_usage(loc->xl_entry); |
| 1595 | } |
| 1596 | if (needed_space < 0) |
| 1597 | needed_space = 0; |
| 1598 | return ocfs2_xa_check_space_helper(needed_space, free_start, count); |
| 1599 | } |
| 1600 | |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 1601 | /* |
| 1602 | * Block storage for xattrs keeps the name+value pairs compacted. When |
| 1603 | * we remove one, we have to shift any that preceded it towards the end. |
| 1604 | */ |
| 1605 | static void ocfs2_xa_block_wipe_namevalue(struct ocfs2_xa_loc *loc) |
| 1606 | { |
| 1607 | int i, offset; |
| 1608 | int namevalue_offset, first_namevalue_offset, namevalue_size; |
| 1609 | struct ocfs2_xattr_entry *entry = loc->xl_entry; |
| 1610 | struct ocfs2_xattr_header *xh = loc->xl_header; |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 1611 | int count = le16_to_cpu(xh->xh_count); |
| 1612 | |
| 1613 | namevalue_offset = le16_to_cpu(entry->xe_name_offset); |
Joel Becker | 199799a | 2009-08-14 19:04:15 -0700 | [diff] [blame] | 1614 | namevalue_size = namevalue_size_xe(entry); |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 1615 | first_namevalue_offset = ocfs2_xa_get_free_start(loc); |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 1616 | |
| 1617 | /* Shift the name+value pairs */ |
| 1618 | memmove((char *)xh + first_namevalue_offset + namevalue_size, |
| 1619 | (char *)xh + first_namevalue_offset, |
| 1620 | namevalue_offset - first_namevalue_offset); |
| 1621 | memset((char *)xh + first_namevalue_offset, 0, namevalue_size); |
| 1622 | |
| 1623 | /* Now tell xh->xh_entries about it */ |
| 1624 | for (i = 0; i < count; i++) { |
| 1625 | offset = le16_to_cpu(xh->xh_entries[i].xe_name_offset); |
Tao Ma | dfe4d3d | 2010-03-19 15:04:23 +0800 | [diff] [blame] | 1626 | if (offset <= namevalue_offset) |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 1627 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, |
| 1628 | namevalue_size); |
| 1629 | } |
| 1630 | |
| 1631 | /* |
| 1632 | * Note that we don't update xh_free_start or xh_name_value_len |
| 1633 | * because they're not used in block-stored xattrs. |
| 1634 | */ |
| 1635 | } |
| 1636 | |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 1637 | static void ocfs2_xa_block_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash) |
| 1638 | { |
| 1639 | int count = le16_to_cpu(loc->xl_header->xh_count); |
| 1640 | loc->xl_entry = &(loc->xl_header->xh_entries[count]); |
| 1641 | le16_add_cpu(&loc->xl_header->xh_count, 1); |
| 1642 | memset(loc->xl_entry, 0, sizeof(struct ocfs2_xattr_entry)); |
| 1643 | } |
| 1644 | |
| 1645 | static void ocfs2_xa_block_add_namevalue(struct ocfs2_xa_loc *loc, int size) |
| 1646 | { |
| 1647 | int free_start = ocfs2_xa_get_free_start(loc); |
| 1648 | |
| 1649 | loc->xl_entry->xe_name_offset = cpu_to_le16(free_start - size); |
| 1650 | } |
| 1651 | |
Joel Becker | 3fc12af | 2009-08-18 13:20:27 -0700 | [diff] [blame] | 1652 | static void ocfs2_xa_block_fill_value_buf(struct ocfs2_xa_loc *loc, |
| 1653 | struct ocfs2_xattr_value_buf *vb) |
| 1654 | { |
| 1655 | struct buffer_head *bh = loc->xl_storage; |
| 1656 | |
| 1657 | if (loc->xl_size == (bh->b_size - |
| 1658 | offsetof(struct ocfs2_xattr_block, |
| 1659 | xb_attrs.xb_header))) |
| 1660 | vb->vb_access = ocfs2_journal_access_xb; |
| 1661 | else |
| 1662 | vb->vb_access = ocfs2_journal_access_di; |
| 1663 | vb->vb_bh = bh; |
| 1664 | } |
| 1665 | |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 1666 | /* |
| 1667 | * Operations for xattrs stored in blocks. This includes inline inode |
| 1668 | * storage and unindexed ocfs2_xattr_blocks. |
| 1669 | */ |
| 1670 | static const struct ocfs2_xa_loc_operations ocfs2_xa_block_loc_ops = { |
Joel Becker | cf2bc80 | 2009-08-18 13:52:38 -0700 | [diff] [blame] | 1671 | .xlo_journal_access = ocfs2_xa_block_journal_access, |
| 1672 | .xlo_journal_dirty = ocfs2_xa_block_journal_dirty, |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 1673 | .xlo_offset_pointer = ocfs2_xa_block_offset_pointer, |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 1674 | .xlo_check_space = ocfs2_xa_block_check_space, |
| 1675 | .xlo_can_reuse = ocfs2_xa_block_can_reuse, |
| 1676 | .xlo_get_free_start = ocfs2_xa_block_get_free_start, |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 1677 | .xlo_wipe_namevalue = ocfs2_xa_block_wipe_namevalue, |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 1678 | .xlo_add_entry = ocfs2_xa_block_add_entry, |
| 1679 | .xlo_add_namevalue = ocfs2_xa_block_add_namevalue, |
Joel Becker | 3fc12af | 2009-08-18 13:20:27 -0700 | [diff] [blame] | 1680 | .xlo_fill_value_buf = ocfs2_xa_block_fill_value_buf, |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 1681 | }; |
| 1682 | |
Joel Becker | cf2bc80 | 2009-08-18 13:52:38 -0700 | [diff] [blame] | 1683 | static int ocfs2_xa_bucket_journal_access(handle_t *handle, |
| 1684 | struct ocfs2_xa_loc *loc, int type) |
| 1685 | { |
| 1686 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; |
| 1687 | |
| 1688 | return ocfs2_xattr_bucket_journal_access(handle, bucket, type); |
| 1689 | } |
| 1690 | |
| 1691 | static void ocfs2_xa_bucket_journal_dirty(handle_t *handle, |
| 1692 | struct ocfs2_xa_loc *loc) |
| 1693 | { |
| 1694 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; |
| 1695 | |
| 1696 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); |
| 1697 | } |
| 1698 | |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 1699 | static void *ocfs2_xa_bucket_offset_pointer(struct ocfs2_xa_loc *loc, |
| 1700 | int offset) |
| 1701 | { |
| 1702 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; |
| 1703 | int block, block_offset; |
| 1704 | |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 1705 | /* The header is at the front of the bucket */ |
Joel Becker | cf2bc80 | 2009-08-18 13:52:38 -0700 | [diff] [blame] | 1706 | block = offset >> loc->xl_inode->i_sb->s_blocksize_bits; |
| 1707 | block_offset = offset % loc->xl_inode->i_sb->s_blocksize; |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 1708 | |
| 1709 | return bucket_block(bucket, block) + block_offset; |
| 1710 | } |
| 1711 | |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 1712 | static int ocfs2_xa_bucket_can_reuse(struct ocfs2_xa_loc *loc, |
| 1713 | struct ocfs2_xattr_info *xi) |
| 1714 | { |
| 1715 | return namevalue_size_xe(loc->xl_entry) >= |
| 1716 | namevalue_size_xi(xi); |
| 1717 | } |
| 1718 | |
| 1719 | static int ocfs2_xa_bucket_get_free_start(struct ocfs2_xa_loc *loc) |
| 1720 | { |
| 1721 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; |
| 1722 | return le16_to_cpu(bucket_xh(bucket)->xh_free_start); |
| 1723 | } |
| 1724 | |
| 1725 | static int ocfs2_bucket_align_free_start(struct super_block *sb, |
| 1726 | int free_start, int size) |
| 1727 | { |
| 1728 | /* |
| 1729 | * We need to make sure that the name+value pair fits within |
| 1730 | * one block. |
| 1731 | */ |
| 1732 | if (((free_start - size) >> sb->s_blocksize_bits) != |
| 1733 | ((free_start - 1) >> sb->s_blocksize_bits)) |
| 1734 | free_start -= free_start % sb->s_blocksize; |
| 1735 | |
| 1736 | return free_start; |
| 1737 | } |
| 1738 | |
| 1739 | static int ocfs2_xa_bucket_check_space(struct ocfs2_xa_loc *loc, |
| 1740 | struct ocfs2_xattr_info *xi) |
| 1741 | { |
| 1742 | int rc; |
| 1743 | int count = le16_to_cpu(loc->xl_header->xh_count); |
| 1744 | int free_start = ocfs2_xa_get_free_start(loc); |
| 1745 | int needed_space = ocfs2_xi_entry_usage(xi); |
| 1746 | int size = namevalue_size_xi(xi); |
Joel Becker | cf2bc80 | 2009-08-18 13:52:38 -0700 | [diff] [blame] | 1747 | struct super_block *sb = loc->xl_inode->i_sb; |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 1748 | |
| 1749 | /* |
| 1750 | * Bucket storage does not reclaim name+value pairs it cannot |
| 1751 | * reuse. They live as holes until the bucket fills, and then |
| 1752 | * the bucket is defragmented. However, the bucket can reclaim |
| 1753 | * the ocfs2_xattr_entry. |
| 1754 | */ |
| 1755 | if (loc->xl_entry) { |
| 1756 | /* Don't need space if we're reusing! */ |
| 1757 | if (ocfs2_xa_can_reuse_entry(loc, xi)) |
| 1758 | needed_space = 0; |
| 1759 | else |
| 1760 | needed_space -= sizeof(struct ocfs2_xattr_entry); |
| 1761 | } |
| 1762 | BUG_ON(needed_space < 0); |
| 1763 | |
| 1764 | if (free_start < size) { |
| 1765 | if (needed_space) |
| 1766 | return -ENOSPC; |
| 1767 | } else { |
| 1768 | /* |
| 1769 | * First we check if it would fit in the first place. |
| 1770 | * Below, we align the free start to a block. This may |
| 1771 | * slide us below the minimum gap. By checking unaligned |
| 1772 | * first, we avoid that error. |
| 1773 | */ |
| 1774 | rc = ocfs2_xa_check_space_helper(needed_space, free_start, |
| 1775 | count); |
| 1776 | if (rc) |
| 1777 | return rc; |
| 1778 | free_start = ocfs2_bucket_align_free_start(sb, free_start, |
| 1779 | size); |
| 1780 | } |
| 1781 | return ocfs2_xa_check_space_helper(needed_space, free_start, count); |
| 1782 | } |
| 1783 | |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 1784 | static void ocfs2_xa_bucket_wipe_namevalue(struct ocfs2_xa_loc *loc) |
| 1785 | { |
Joel Becker | 199799a | 2009-08-14 19:04:15 -0700 | [diff] [blame] | 1786 | le16_add_cpu(&loc->xl_header->xh_name_value_len, |
| 1787 | -namevalue_size_xe(loc->xl_entry)); |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 1788 | } |
| 1789 | |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 1790 | static void ocfs2_xa_bucket_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash) |
| 1791 | { |
| 1792 | struct ocfs2_xattr_header *xh = loc->xl_header; |
| 1793 | int count = le16_to_cpu(xh->xh_count); |
| 1794 | int low = 0, high = count - 1, tmp; |
| 1795 | struct ocfs2_xattr_entry *tmp_xe; |
| 1796 | |
| 1797 | /* |
| 1798 | * We keep buckets sorted by name_hash, so we need to find |
| 1799 | * our insert place. |
| 1800 | */ |
| 1801 | while (low <= high && count) { |
| 1802 | tmp = (low + high) / 2; |
| 1803 | tmp_xe = &xh->xh_entries[tmp]; |
| 1804 | |
| 1805 | if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash)) |
| 1806 | low = tmp + 1; |
| 1807 | else if (name_hash < le32_to_cpu(tmp_xe->xe_name_hash)) |
| 1808 | high = tmp - 1; |
| 1809 | else { |
| 1810 | low = tmp; |
| 1811 | break; |
| 1812 | } |
| 1813 | } |
| 1814 | |
| 1815 | if (low != count) |
| 1816 | memmove(&xh->xh_entries[low + 1], |
| 1817 | &xh->xh_entries[low], |
| 1818 | ((count - low) * sizeof(struct ocfs2_xattr_entry))); |
| 1819 | |
| 1820 | le16_add_cpu(&xh->xh_count, 1); |
| 1821 | loc->xl_entry = &xh->xh_entries[low]; |
| 1822 | memset(loc->xl_entry, 0, sizeof(struct ocfs2_xattr_entry)); |
| 1823 | } |
| 1824 | |
| 1825 | static void ocfs2_xa_bucket_add_namevalue(struct ocfs2_xa_loc *loc, int size) |
| 1826 | { |
| 1827 | int free_start = ocfs2_xa_get_free_start(loc); |
| 1828 | struct ocfs2_xattr_header *xh = loc->xl_header; |
Joel Becker | cf2bc80 | 2009-08-18 13:52:38 -0700 | [diff] [blame] | 1829 | struct super_block *sb = loc->xl_inode->i_sb; |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 1830 | int nameval_offset; |
| 1831 | |
| 1832 | free_start = ocfs2_bucket_align_free_start(sb, free_start, size); |
| 1833 | nameval_offset = free_start - size; |
| 1834 | loc->xl_entry->xe_name_offset = cpu_to_le16(nameval_offset); |
| 1835 | xh->xh_free_start = cpu_to_le16(nameval_offset); |
| 1836 | le16_add_cpu(&xh->xh_name_value_len, size); |
| 1837 | |
| 1838 | } |
| 1839 | |
Joel Becker | 3fc12af | 2009-08-18 13:20:27 -0700 | [diff] [blame] | 1840 | static void ocfs2_xa_bucket_fill_value_buf(struct ocfs2_xa_loc *loc, |
| 1841 | struct ocfs2_xattr_value_buf *vb) |
| 1842 | { |
| 1843 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; |
Joel Becker | cf2bc80 | 2009-08-18 13:52:38 -0700 | [diff] [blame] | 1844 | struct super_block *sb = loc->xl_inode->i_sb; |
Joel Becker | 3fc12af | 2009-08-18 13:20:27 -0700 | [diff] [blame] | 1845 | int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset); |
| 1846 | int size = namevalue_size_xe(loc->xl_entry); |
| 1847 | int block_offset = nameval_offset >> sb->s_blocksize_bits; |
| 1848 | |
| 1849 | /* Values are not allowed to straddle block boundaries */ |
| 1850 | BUG_ON(block_offset != |
| 1851 | ((nameval_offset + size - 1) >> sb->s_blocksize_bits)); |
| 1852 | /* We expect the bucket to be filled in */ |
| 1853 | BUG_ON(!bucket->bu_bhs[block_offset]); |
| 1854 | |
| 1855 | vb->vb_access = ocfs2_journal_access; |
| 1856 | vb->vb_bh = bucket->bu_bhs[block_offset]; |
| 1857 | } |
| 1858 | |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 1859 | /* Operations for xattrs stored in buckets. */ |
| 1860 | static const struct ocfs2_xa_loc_operations ocfs2_xa_bucket_loc_ops = { |
Joel Becker | cf2bc80 | 2009-08-18 13:52:38 -0700 | [diff] [blame] | 1861 | .xlo_journal_access = ocfs2_xa_bucket_journal_access, |
| 1862 | .xlo_journal_dirty = ocfs2_xa_bucket_journal_dirty, |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 1863 | .xlo_offset_pointer = ocfs2_xa_bucket_offset_pointer, |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 1864 | .xlo_check_space = ocfs2_xa_bucket_check_space, |
| 1865 | .xlo_can_reuse = ocfs2_xa_bucket_can_reuse, |
| 1866 | .xlo_get_free_start = ocfs2_xa_bucket_get_free_start, |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 1867 | .xlo_wipe_namevalue = ocfs2_xa_bucket_wipe_namevalue, |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 1868 | .xlo_add_entry = ocfs2_xa_bucket_add_entry, |
| 1869 | .xlo_add_namevalue = ocfs2_xa_bucket_add_namevalue, |
Joel Becker | 3fc12af | 2009-08-18 13:20:27 -0700 | [diff] [blame] | 1870 | .xlo_fill_value_buf = ocfs2_xa_bucket_fill_value_buf, |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 1871 | }; |
| 1872 | |
Joel Becker | 399ff3a | 2009-09-01 18:38:27 -0700 | [diff] [blame] | 1873 | static unsigned int ocfs2_xa_value_clusters(struct ocfs2_xa_loc *loc) |
| 1874 | { |
| 1875 | struct ocfs2_xattr_value_buf vb; |
| 1876 | |
| 1877 | if (ocfs2_xattr_is_local(loc->xl_entry)) |
| 1878 | return 0; |
| 1879 | |
| 1880 | ocfs2_xa_fill_value_buf(loc, &vb); |
| 1881 | return le32_to_cpu(vb.vb_xv->xr_clusters); |
| 1882 | } |
| 1883 | |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 1884 | static int ocfs2_xa_value_truncate(struct ocfs2_xa_loc *loc, u64 bytes, |
| 1885 | struct ocfs2_xattr_set_ctxt *ctxt) |
| 1886 | { |
| 1887 | int trunc_rc, access_rc; |
| 1888 | struct ocfs2_xattr_value_buf vb; |
| 1889 | |
| 1890 | ocfs2_xa_fill_value_buf(loc, &vb); |
| 1891 | trunc_rc = ocfs2_xattr_value_truncate(loc->xl_inode, &vb, bytes, |
| 1892 | ctxt); |
| 1893 | |
| 1894 | /* |
| 1895 | * The caller of ocfs2_xa_value_truncate() has already called |
| 1896 | * ocfs2_xa_journal_access on the loc. However, The truncate code |
| 1897 | * calls ocfs2_extend_trans(). This may commit the previous |
| 1898 | * transaction and open a new one. If this is a bucket, truncate |
| 1899 | * could leave only vb->vb_bh set up for journaling. Meanwhile, |
| 1900 | * the caller is expecting to dirty the entire bucket. So we must |
| 1901 | * reset the journal work. We do this even if truncate has failed, |
| 1902 | * as it could have failed after committing the extend. |
| 1903 | */ |
| 1904 | access_rc = ocfs2_xa_journal_access(ctxt->handle, loc, |
| 1905 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 1906 | |
| 1907 | /* Errors in truncate take precedence */ |
| 1908 | return trunc_rc ? trunc_rc : access_rc; |
| 1909 | } |
| 1910 | |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 1911 | static void ocfs2_xa_remove_entry(struct ocfs2_xa_loc *loc) |
| 1912 | { |
Joel Becker | bde1e54 | 2009-08-14 16:58:38 -0700 | [diff] [blame] | 1913 | int index, count; |
| 1914 | struct ocfs2_xattr_header *xh = loc->xl_header; |
| 1915 | struct ocfs2_xattr_entry *entry = loc->xl_entry; |
| 1916 | |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 1917 | ocfs2_xa_wipe_namevalue(loc); |
Joel Becker | bde1e54 | 2009-08-14 16:58:38 -0700 | [diff] [blame] | 1918 | loc->xl_entry = NULL; |
| 1919 | |
| 1920 | le16_add_cpu(&xh->xh_count, -1); |
| 1921 | count = le16_to_cpu(xh->xh_count); |
| 1922 | |
| 1923 | /* |
| 1924 | * Only zero out the entry if there are more remaining. This is |
| 1925 | * important for an empty bucket, as it keeps track of the |
| 1926 | * bucket's hash value. It doesn't hurt empty block storage. |
| 1927 | */ |
| 1928 | if (count) { |
| 1929 | index = ((char *)entry - (char *)&xh->xh_entries) / |
| 1930 | sizeof(struct ocfs2_xattr_entry); |
| 1931 | memmove(&xh->xh_entries[index], &xh->xh_entries[index + 1], |
| 1932 | (count - index) * sizeof(struct ocfs2_xattr_entry)); |
| 1933 | memset(&xh->xh_entries[count], 0, |
| 1934 | sizeof(struct ocfs2_xattr_entry)); |
| 1935 | } |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 1936 | } |
| 1937 | |
Joel Becker | 399ff3a | 2009-09-01 18:38:27 -0700 | [diff] [blame] | 1938 | /* |
| 1939 | * If we have a problem adjusting the size of an external value during |
| 1940 | * ocfs2_xa_prepare_entry() or ocfs2_xa_remove(), we may have an xattr |
| 1941 | * in an intermediate state. For example, the value may be partially |
| 1942 | * truncated. |
| 1943 | * |
| 1944 | * If the value tree hasn't changed, the extend/truncate went nowhere. |
| 1945 | * We have nothing to do. The caller can treat it as a straight error. |
| 1946 | * |
| 1947 | * If the value tree got partially truncated, we now have a corrupted |
| 1948 | * extended attribute. We're going to wipe its entry and leak the |
| 1949 | * clusters. Better to leak some storage than leave a corrupt entry. |
| 1950 | * |
| 1951 | * If the value tree grew, it obviously didn't grow enough for the |
| 1952 | * new entry. We're not going to try and reclaim those clusters either. |
| 1953 | * If there was already an external value there (orig_clusters != 0), |
| 1954 | * the new clusters are attached safely and we can just leave the old |
| 1955 | * value in place. If there was no external value there, we remove |
| 1956 | * the entry. |
| 1957 | * |
| 1958 | * This way, the xattr block we store in the journal will be consistent. |
| 1959 | * If the size change broke because of the journal, no changes will hit |
| 1960 | * disk anyway. |
| 1961 | */ |
| 1962 | static void ocfs2_xa_cleanup_value_truncate(struct ocfs2_xa_loc *loc, |
| 1963 | const char *what, |
| 1964 | unsigned int orig_clusters) |
| 1965 | { |
| 1966 | unsigned int new_clusters = ocfs2_xa_value_clusters(loc); |
| 1967 | char *nameval_buf = ocfs2_xa_offset_pointer(loc, |
| 1968 | le16_to_cpu(loc->xl_entry->xe_name_offset)); |
| 1969 | |
| 1970 | if (new_clusters < orig_clusters) { |
| 1971 | mlog(ML_ERROR, |
| 1972 | "Partial truncate while %s xattr %.*s. Leaking " |
| 1973 | "%u clusters and removing the entry\n", |
| 1974 | what, loc->xl_entry->xe_name_len, nameval_buf, |
| 1975 | orig_clusters - new_clusters); |
| 1976 | ocfs2_xa_remove_entry(loc); |
| 1977 | } else if (!orig_clusters) { |
| 1978 | mlog(ML_ERROR, |
| 1979 | "Unable to allocate an external value for xattr " |
| 1980 | "%.*s safely. Leaking %u clusters and removing the " |
| 1981 | "entry\n", |
| 1982 | loc->xl_entry->xe_name_len, nameval_buf, |
| 1983 | new_clusters - orig_clusters); |
| 1984 | ocfs2_xa_remove_entry(loc); |
| 1985 | } else if (new_clusters > orig_clusters) |
| 1986 | mlog(ML_ERROR, |
| 1987 | "Unable to grow xattr %.*s safely. %u new clusters " |
| 1988 | "have been added, but the value will not be " |
| 1989 | "modified\n", |
| 1990 | loc->xl_entry->xe_name_len, nameval_buf, |
| 1991 | new_clusters - orig_clusters); |
| 1992 | } |
| 1993 | |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 1994 | static int ocfs2_xa_remove(struct ocfs2_xa_loc *loc, |
| 1995 | struct ocfs2_xattr_set_ctxt *ctxt) |
| 1996 | { |
| 1997 | int rc = 0; |
Joel Becker | 399ff3a | 2009-09-01 18:38:27 -0700 | [diff] [blame] | 1998 | unsigned int orig_clusters; |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 1999 | |
| 2000 | if (!ocfs2_xattr_is_local(loc->xl_entry)) { |
Joel Becker | 399ff3a | 2009-09-01 18:38:27 -0700 | [diff] [blame] | 2001 | orig_clusters = ocfs2_xa_value_clusters(loc); |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 2002 | rc = ocfs2_xa_value_truncate(loc, 0, ctxt); |
| 2003 | if (rc) { |
| 2004 | mlog_errno(rc); |
Joel Becker | 399ff3a | 2009-09-01 18:38:27 -0700 | [diff] [blame] | 2005 | /* |
| 2006 | * Since this is remove, we can return 0 if |
| 2007 | * ocfs2_xa_cleanup_value_truncate() is going to |
| 2008 | * wipe the entry anyway. So we check the |
| 2009 | * cluster count as well. |
| 2010 | */ |
| 2011 | if (orig_clusters != ocfs2_xa_value_clusters(loc)) |
| 2012 | rc = 0; |
| 2013 | ocfs2_xa_cleanup_value_truncate(loc, "removing", |
| 2014 | orig_clusters); |
| 2015 | if (rc) |
| 2016 | goto out; |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 2017 | } |
| 2018 | } |
| 2019 | |
| 2020 | ocfs2_xa_remove_entry(loc); |
| 2021 | |
| 2022 | out: |
| 2023 | return rc; |
| 2024 | } |
| 2025 | |
| 2026 | static void ocfs2_xa_install_value_root(struct ocfs2_xa_loc *loc) |
| 2027 | { |
| 2028 | int name_size = OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len); |
| 2029 | char *nameval_buf; |
| 2030 | |
| 2031 | nameval_buf = ocfs2_xa_offset_pointer(loc, |
| 2032 | le16_to_cpu(loc->xl_entry->xe_name_offset)); |
| 2033 | memcpy(nameval_buf + name_size, &def_xv, OCFS2_XATTR_ROOT_SIZE); |
| 2034 | } |
| 2035 | |
| 2036 | /* |
| 2037 | * Take an existing entry and make it ready for the new value. This |
| 2038 | * won't allocate space, but it may free space. It should be ready for |
| 2039 | * ocfs2_xa_prepare_entry() to finish the work. |
| 2040 | */ |
| 2041 | static int ocfs2_xa_reuse_entry(struct ocfs2_xa_loc *loc, |
| 2042 | struct ocfs2_xattr_info *xi, |
| 2043 | struct ocfs2_xattr_set_ctxt *ctxt) |
| 2044 | { |
| 2045 | int rc = 0; |
| 2046 | int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len); |
Joel Becker | 399ff3a | 2009-09-01 18:38:27 -0700 | [diff] [blame] | 2047 | unsigned int orig_clusters; |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 2048 | char *nameval_buf; |
| 2049 | int xe_local = ocfs2_xattr_is_local(loc->xl_entry); |
| 2050 | int xi_local = xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE; |
| 2051 | |
| 2052 | BUG_ON(OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len) != |
| 2053 | name_size); |
| 2054 | |
| 2055 | nameval_buf = ocfs2_xa_offset_pointer(loc, |
| 2056 | le16_to_cpu(loc->xl_entry->xe_name_offset)); |
| 2057 | if (xe_local) { |
| 2058 | memset(nameval_buf + name_size, 0, |
| 2059 | namevalue_size_xe(loc->xl_entry) - name_size); |
| 2060 | if (!xi_local) |
| 2061 | ocfs2_xa_install_value_root(loc); |
| 2062 | } else { |
Joel Becker | 399ff3a | 2009-09-01 18:38:27 -0700 | [diff] [blame] | 2063 | orig_clusters = ocfs2_xa_value_clusters(loc); |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 2064 | if (xi_local) { |
| 2065 | rc = ocfs2_xa_value_truncate(loc, 0, ctxt); |
Joel Becker | 399ff3a | 2009-09-01 18:38:27 -0700 | [diff] [blame] | 2066 | if (rc < 0) |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 2067 | mlog_errno(rc); |
Joel Becker | 399ff3a | 2009-09-01 18:38:27 -0700 | [diff] [blame] | 2068 | else |
| 2069 | memset(nameval_buf + name_size, 0, |
| 2070 | namevalue_size_xe(loc->xl_entry) - |
| 2071 | name_size); |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 2072 | } else if (le64_to_cpu(loc->xl_entry->xe_value_size) > |
| 2073 | xi->xi_value_len) { |
| 2074 | rc = ocfs2_xa_value_truncate(loc, xi->xi_value_len, |
| 2075 | ctxt); |
Joel Becker | 399ff3a | 2009-09-01 18:38:27 -0700 | [diff] [blame] | 2076 | if (rc < 0) |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 2077 | mlog_errno(rc); |
Joel Becker | 399ff3a | 2009-09-01 18:38:27 -0700 | [diff] [blame] | 2078 | } |
| 2079 | |
| 2080 | if (rc) { |
| 2081 | ocfs2_xa_cleanup_value_truncate(loc, "reusing", |
| 2082 | orig_clusters); |
| 2083 | goto out; |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 2084 | } |
| 2085 | } |
| 2086 | |
| 2087 | loc->xl_entry->xe_value_size = cpu_to_le64(xi->xi_value_len); |
| 2088 | ocfs2_xattr_set_local(loc->xl_entry, xi_local); |
| 2089 | |
| 2090 | out: |
| 2091 | return rc; |
| 2092 | } |
| 2093 | |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 2094 | /* |
| 2095 | * Prepares loc->xl_entry to receive the new xattr. This includes |
| 2096 | * properly setting up the name+value pair region. If loc->xl_entry |
| 2097 | * already exists, it will take care of modifying it appropriately. |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 2098 | * |
| 2099 | * Note that this modifies the data. You did journal_access already, |
| 2100 | * right? |
| 2101 | */ |
| 2102 | static int ocfs2_xa_prepare_entry(struct ocfs2_xa_loc *loc, |
| 2103 | struct ocfs2_xattr_info *xi, |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 2104 | u32 name_hash, |
| 2105 | struct ocfs2_xattr_set_ctxt *ctxt) |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 2106 | { |
| 2107 | int rc = 0; |
Joel Becker | 399ff3a | 2009-09-01 18:38:27 -0700 | [diff] [blame] | 2108 | unsigned int orig_clusters; |
| 2109 | __le64 orig_value_size = 0; |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 2110 | |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 2111 | rc = ocfs2_xa_check_space(loc, xi); |
| 2112 | if (rc) |
| 2113 | goto out; |
| 2114 | |
| 2115 | if (loc->xl_entry) { |
| 2116 | if (ocfs2_xa_can_reuse_entry(loc, xi)) { |
Joel Becker | 399ff3a | 2009-09-01 18:38:27 -0700 | [diff] [blame] | 2117 | orig_value_size = loc->xl_entry->xe_value_size; |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 2118 | rc = ocfs2_xa_reuse_entry(loc, xi, ctxt); |
| 2119 | if (rc) |
| 2120 | goto out; |
| 2121 | goto alloc_value; |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 2122 | } |
| 2123 | |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 2124 | if (!ocfs2_xattr_is_local(loc->xl_entry)) { |
Joel Becker | 399ff3a | 2009-09-01 18:38:27 -0700 | [diff] [blame] | 2125 | orig_clusters = ocfs2_xa_value_clusters(loc); |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 2126 | rc = ocfs2_xa_value_truncate(loc, 0, ctxt); |
| 2127 | if (rc) { |
| 2128 | mlog_errno(rc); |
Joel Becker | 399ff3a | 2009-09-01 18:38:27 -0700 | [diff] [blame] | 2129 | ocfs2_xa_cleanup_value_truncate(loc, |
| 2130 | "overwriting", |
| 2131 | orig_clusters); |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 2132 | goto out; |
| 2133 | } |
| 2134 | } |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 2135 | ocfs2_xa_wipe_namevalue(loc); |
| 2136 | } else |
| 2137 | ocfs2_xa_add_entry(loc, name_hash); |
| 2138 | |
| 2139 | /* |
| 2140 | * If we get here, we have a blank entry. Fill it. We grow our |
| 2141 | * name+value pair back from the end. |
| 2142 | */ |
| 2143 | ocfs2_xa_add_namevalue(loc, xi); |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 2144 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) |
| 2145 | ocfs2_xa_install_value_root(loc); |
| 2146 | |
| 2147 | alloc_value: |
| 2148 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
Joel Becker | 399ff3a | 2009-09-01 18:38:27 -0700 | [diff] [blame] | 2149 | orig_clusters = ocfs2_xa_value_clusters(loc); |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 2150 | rc = ocfs2_xa_value_truncate(loc, xi->xi_value_len, ctxt); |
Joel Becker | 399ff3a | 2009-09-01 18:38:27 -0700 | [diff] [blame] | 2151 | if (rc < 0) { |
Tao Ma | 5f5261a | 2010-05-13 22:49:05 +0800 | [diff] [blame] | 2152 | ctxt->set_abort = 1; |
Joel Becker | 399ff3a | 2009-09-01 18:38:27 -0700 | [diff] [blame] | 2153 | ocfs2_xa_cleanup_value_truncate(loc, "growing", |
| 2154 | orig_clusters); |
Tao Ma | d5a7df0 | 2010-05-10 18:09:47 +0800 | [diff] [blame] | 2155 | /* |
| 2156 | * If we were growing an existing value, |
| 2157 | * ocfs2_xa_cleanup_value_truncate() won't remove |
| 2158 | * the entry. We need to restore the original value |
| 2159 | * size. |
| 2160 | */ |
| 2161 | if (loc->xl_entry) { |
| 2162 | BUG_ON(!orig_value_size); |
| 2163 | loc->xl_entry->xe_value_size = orig_value_size; |
| 2164 | } |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 2165 | mlog_errno(rc); |
Joel Becker | 399ff3a | 2009-09-01 18:38:27 -0700 | [diff] [blame] | 2166 | } |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 2167 | } |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 2168 | |
| 2169 | out: |
| 2170 | return rc; |
| 2171 | } |
| 2172 | |
| 2173 | /* |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 2174 | * Store the value portion of the name+value pair. This will skip |
| 2175 | * values that are stored externally. Their tree roots were set up |
| 2176 | * by ocfs2_xa_prepare_entry(). |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 2177 | */ |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 2178 | static int ocfs2_xa_store_value(struct ocfs2_xa_loc *loc, |
| 2179 | struct ocfs2_xattr_info *xi, |
| 2180 | struct ocfs2_xattr_set_ctxt *ctxt) |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 2181 | { |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 2182 | int rc = 0; |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 2183 | int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset); |
| 2184 | int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len); |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 2185 | char *nameval_buf; |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 2186 | struct ocfs2_xattr_value_buf vb; |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 2187 | |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 2188 | nameval_buf = ocfs2_xa_offset_pointer(loc, nameval_offset); |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 2189 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
| 2190 | ocfs2_xa_fill_value_buf(loc, &vb); |
| 2191 | rc = __ocfs2_xattr_set_value_outside(loc->xl_inode, |
| 2192 | ctxt->handle, &vb, |
| 2193 | xi->xi_value, |
| 2194 | xi->xi_value_len); |
| 2195 | } else |
| 2196 | memcpy(nameval_buf + name_size, xi->xi_value, xi->xi_value_len); |
| 2197 | |
Joel Becker | 73857ee | 2009-08-18 20:26:41 -0700 | [diff] [blame] | 2198 | return rc; |
Joel Becker | 69a3e53 | 2009-08-17 12:24:39 -0700 | [diff] [blame] | 2199 | } |
| 2200 | |
Joel Becker | bca5e9b | 2009-08-18 20:40:14 -0700 | [diff] [blame] | 2201 | static int ocfs2_xa_set(struct ocfs2_xa_loc *loc, |
| 2202 | struct ocfs2_xattr_info *xi, |
| 2203 | struct ocfs2_xattr_set_ctxt *ctxt) |
| 2204 | { |
| 2205 | int ret; |
| 2206 | u32 name_hash = ocfs2_xattr_name_hash(loc->xl_inode, xi->xi_name, |
| 2207 | xi->xi_name_len); |
| 2208 | |
| 2209 | ret = ocfs2_xa_journal_access(ctxt->handle, loc, |
| 2210 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 2211 | if (ret) { |
| 2212 | mlog_errno(ret); |
| 2213 | goto out; |
| 2214 | } |
| 2215 | |
Joel Becker | 399ff3a | 2009-09-01 18:38:27 -0700 | [diff] [blame] | 2216 | /* |
| 2217 | * From here on out, everything is going to modify the buffer a |
| 2218 | * little. Errors are going to leave the xattr header in a |
| 2219 | * sane state. Thus, even with errors we dirty the sucker. |
| 2220 | */ |
| 2221 | |
Joel Becker | bca5e9b | 2009-08-18 20:40:14 -0700 | [diff] [blame] | 2222 | /* Don't worry, we are never called with !xi_value and !xl_entry */ |
| 2223 | if (!xi->xi_value) { |
| 2224 | ret = ocfs2_xa_remove(loc, ctxt); |
Joel Becker | 399ff3a | 2009-09-01 18:38:27 -0700 | [diff] [blame] | 2225 | goto out_dirty; |
Joel Becker | bca5e9b | 2009-08-18 20:40:14 -0700 | [diff] [blame] | 2226 | } |
| 2227 | |
| 2228 | ret = ocfs2_xa_prepare_entry(loc, xi, name_hash, ctxt); |
| 2229 | if (ret) { |
| 2230 | if (ret != -ENOSPC) |
| 2231 | mlog_errno(ret); |
Joel Becker | 399ff3a | 2009-09-01 18:38:27 -0700 | [diff] [blame] | 2232 | goto out_dirty; |
Joel Becker | bca5e9b | 2009-08-18 20:40:14 -0700 | [diff] [blame] | 2233 | } |
| 2234 | |
| 2235 | ret = ocfs2_xa_store_value(loc, xi, ctxt); |
Joel Becker | 399ff3a | 2009-09-01 18:38:27 -0700 | [diff] [blame] | 2236 | if (ret) |
Joel Becker | bca5e9b | 2009-08-18 20:40:14 -0700 | [diff] [blame] | 2237 | mlog_errno(ret); |
Joel Becker | bca5e9b | 2009-08-18 20:40:14 -0700 | [diff] [blame] | 2238 | |
Joel Becker | 399ff3a | 2009-09-01 18:38:27 -0700 | [diff] [blame] | 2239 | out_dirty: |
Joel Becker | bca5e9b | 2009-08-18 20:40:14 -0700 | [diff] [blame] | 2240 | ocfs2_xa_journal_dirty(ctxt->handle, loc); |
| 2241 | |
| 2242 | out: |
| 2243 | return ret; |
| 2244 | } |
| 2245 | |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 2246 | static void ocfs2_init_dinode_xa_loc(struct ocfs2_xa_loc *loc, |
| 2247 | struct inode *inode, |
| 2248 | struct buffer_head *bh, |
| 2249 | struct ocfs2_xattr_entry *entry) |
| 2250 | { |
| 2251 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; |
| 2252 | |
Joel Becker | 139ffac | 2009-08-19 11:09:17 -0700 | [diff] [blame] | 2253 | BUG_ON(!(OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_XATTR_FL)); |
| 2254 | |
Joel Becker | cf2bc80 | 2009-08-18 13:52:38 -0700 | [diff] [blame] | 2255 | loc->xl_inode = inode; |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 2256 | loc->xl_ops = &ocfs2_xa_block_loc_ops; |
| 2257 | loc->xl_storage = bh; |
| 2258 | loc->xl_entry = entry; |
Joel Becker | 139ffac | 2009-08-19 11:09:17 -0700 | [diff] [blame] | 2259 | loc->xl_size = le16_to_cpu(di->i_xattr_inline_size); |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 2260 | loc->xl_header = |
| 2261 | (struct ocfs2_xattr_header *)(bh->b_data + bh->b_size - |
| 2262 | loc->xl_size); |
| 2263 | } |
| 2264 | |
| 2265 | static void ocfs2_init_xattr_block_xa_loc(struct ocfs2_xa_loc *loc, |
Joel Becker | cf2bc80 | 2009-08-18 13:52:38 -0700 | [diff] [blame] | 2266 | struct inode *inode, |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 2267 | struct buffer_head *bh, |
| 2268 | struct ocfs2_xattr_entry *entry) |
| 2269 | { |
| 2270 | struct ocfs2_xattr_block *xb = |
| 2271 | (struct ocfs2_xattr_block *)bh->b_data; |
| 2272 | |
| 2273 | BUG_ON(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED); |
| 2274 | |
Joel Becker | cf2bc80 | 2009-08-18 13:52:38 -0700 | [diff] [blame] | 2275 | loc->xl_inode = inode; |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 2276 | loc->xl_ops = &ocfs2_xa_block_loc_ops; |
| 2277 | loc->xl_storage = bh; |
| 2278 | loc->xl_header = &(xb->xb_attrs.xb_header); |
| 2279 | loc->xl_entry = entry; |
| 2280 | loc->xl_size = bh->b_size - offsetof(struct ocfs2_xattr_block, |
| 2281 | xb_attrs.xb_header); |
| 2282 | } |
| 2283 | |
| 2284 | static void ocfs2_init_xattr_bucket_xa_loc(struct ocfs2_xa_loc *loc, |
| 2285 | struct ocfs2_xattr_bucket *bucket, |
| 2286 | struct ocfs2_xattr_entry *entry) |
| 2287 | { |
Joel Becker | cf2bc80 | 2009-08-18 13:52:38 -0700 | [diff] [blame] | 2288 | loc->xl_inode = bucket->bu_inode; |
Joel Becker | 11179f2 | 2009-08-14 16:07:44 -0700 | [diff] [blame] | 2289 | loc->xl_ops = &ocfs2_xa_bucket_loc_ops; |
| 2290 | loc->xl_storage = bucket; |
| 2291 | loc->xl_header = bucket_xh(bucket); |
| 2292 | loc->xl_entry = entry; |
| 2293 | loc->xl_size = OCFS2_XATTR_BUCKET_SIZE; |
| 2294 | } |
| 2295 | |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 2296 | /* |
| 2297 | * In xattr remove, if it is stored outside and refcounted, we may have |
| 2298 | * the chance to split the refcount tree. So need the allocators. |
| 2299 | */ |
| 2300 | static int ocfs2_lock_xattr_remove_allocators(struct inode *inode, |
| 2301 | struct ocfs2_xattr_value_root *xv, |
| 2302 | struct ocfs2_caching_info *ref_ci, |
| 2303 | struct buffer_head *ref_root_bh, |
| 2304 | struct ocfs2_alloc_context **meta_ac, |
| 2305 | int *ref_credits) |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2306 | { |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 2307 | int ret, meta_add = 0; |
| 2308 | u32 p_cluster, num_clusters; |
| 2309 | unsigned int ext_flags; |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 2310 | |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 2311 | *ref_credits = 0; |
| 2312 | ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster, |
| 2313 | &num_clusters, |
| 2314 | &xv->xr_list, |
| 2315 | &ext_flags); |
| 2316 | if (ret) { |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 2317 | mlog_errno(ret); |
| 2318 | goto out; |
| 2319 | } |
| 2320 | |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 2321 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) |
| 2322 | goto out; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2323 | |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 2324 | ret = ocfs2_refcounted_xattr_delete_need(inode, ref_ci, |
| 2325 | ref_root_bh, xv, |
| 2326 | &meta_add, ref_credits); |
| 2327 | if (ret) { |
| 2328 | mlog_errno(ret); |
| 2329 | goto out; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2330 | } |
| 2331 | |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 2332 | ret = ocfs2_reserve_new_metadata_blocks(OCFS2_SB(inode->i_sb), |
| 2333 | meta_add, meta_ac); |
| 2334 | if (ret) |
| 2335 | mlog_errno(ret); |
| 2336 | |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 2337 | out: |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2338 | return ret; |
| 2339 | } |
| 2340 | |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 2341 | static int ocfs2_remove_value_outside(struct inode*inode, |
| 2342 | struct ocfs2_xattr_value_buf *vb, |
| 2343 | struct ocfs2_xattr_header *header, |
| 2344 | struct ocfs2_caching_info *ref_ci, |
| 2345 | struct buffer_head *ref_root_bh) |
| 2346 | { |
| 2347 | int ret = 0, i, ref_credits; |
| 2348 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 2349 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; |
| 2350 | void *val; |
| 2351 | |
| 2352 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); |
| 2353 | |
| 2354 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { |
| 2355 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; |
| 2356 | |
| 2357 | if (ocfs2_xattr_is_local(entry)) |
| 2358 | continue; |
| 2359 | |
| 2360 | val = (void *)header + |
| 2361 | le16_to_cpu(entry->xe_name_offset); |
| 2362 | vb->vb_xv = (struct ocfs2_xattr_value_root *) |
| 2363 | (val + OCFS2_XATTR_SIZE(entry->xe_name_len)); |
| 2364 | |
| 2365 | ret = ocfs2_lock_xattr_remove_allocators(inode, vb->vb_xv, |
| 2366 | ref_ci, ref_root_bh, |
| 2367 | &ctxt.meta_ac, |
| 2368 | &ref_credits); |
| 2369 | |
| 2370 | ctxt.handle = ocfs2_start_trans(osb, ref_credits + |
| 2371 | ocfs2_remove_extent_credits(osb->sb)); |
| 2372 | if (IS_ERR(ctxt.handle)) { |
| 2373 | ret = PTR_ERR(ctxt.handle); |
| 2374 | mlog_errno(ret); |
| 2375 | break; |
| 2376 | } |
| 2377 | |
| 2378 | ret = ocfs2_xattr_value_truncate(inode, vb, 0, &ctxt); |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 2379 | |
| 2380 | ocfs2_commit_trans(osb, ctxt.handle); |
| 2381 | if (ctxt.meta_ac) { |
| 2382 | ocfs2_free_alloc_context(ctxt.meta_ac); |
| 2383 | ctxt.meta_ac = NULL; |
| 2384 | } |
Wengang Wang | b8a0ae5 | 2011-10-12 15:22:15 +0800 | [diff] [blame^] | 2385 | |
| 2386 | if (ret < 0) { |
| 2387 | mlog_errno(ret); |
| 2388 | break; |
| 2389 | } |
| 2390 | |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 2391 | } |
| 2392 | |
| 2393 | if (ctxt.meta_ac) |
| 2394 | ocfs2_free_alloc_context(ctxt.meta_ac); |
| 2395 | ocfs2_schedule_truncate_log_flush(osb, 1); |
| 2396 | ocfs2_run_deallocs(osb, &ctxt.dealloc); |
| 2397 | return ret; |
| 2398 | } |
| 2399 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2400 | static int ocfs2_xattr_ibody_remove(struct inode *inode, |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 2401 | struct buffer_head *di_bh, |
| 2402 | struct ocfs2_caching_info *ref_ci, |
| 2403 | struct buffer_head *ref_root_bh) |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2404 | { |
| 2405 | |
| 2406 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; |
| 2407 | struct ocfs2_xattr_header *header; |
| 2408 | int ret; |
Joel Becker | 4311901 | 2008-12-09 16:24:43 -0800 | [diff] [blame] | 2409 | struct ocfs2_xattr_value_buf vb = { |
| 2410 | .vb_bh = di_bh, |
| 2411 | .vb_access = ocfs2_journal_access_di, |
| 2412 | }; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2413 | |
| 2414 | header = (struct ocfs2_xattr_header *) |
| 2415 | ((void *)di + inode->i_sb->s_blocksize - |
| 2416 | le16_to_cpu(di->i_xattr_inline_size)); |
| 2417 | |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 2418 | ret = ocfs2_remove_value_outside(inode, &vb, header, |
| 2419 | ref_ci, ref_root_bh); |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2420 | |
| 2421 | return ret; |
| 2422 | } |
| 2423 | |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 2424 | struct ocfs2_rm_xattr_bucket_para { |
| 2425 | struct ocfs2_caching_info *ref_ci; |
| 2426 | struct buffer_head *ref_root_bh; |
| 2427 | }; |
| 2428 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2429 | static int ocfs2_xattr_block_remove(struct inode *inode, |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 2430 | struct buffer_head *blk_bh, |
| 2431 | struct ocfs2_caching_info *ref_ci, |
| 2432 | struct buffer_head *ref_root_bh) |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2433 | { |
| 2434 | struct ocfs2_xattr_block *xb; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2435 | int ret = 0; |
Joel Becker | 4311901 | 2008-12-09 16:24:43 -0800 | [diff] [blame] | 2436 | struct ocfs2_xattr_value_buf vb = { |
| 2437 | .vb_bh = blk_bh, |
| 2438 | .vb_access = ocfs2_journal_access_xb, |
| 2439 | }; |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 2440 | struct ocfs2_rm_xattr_bucket_para args = { |
| 2441 | .ref_ci = ref_ci, |
| 2442 | .ref_root_bh = ref_root_bh, |
| 2443 | }; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2444 | |
| 2445 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
Tao Ma | a394425 | 2008-08-18 17:38:54 +0800 | [diff] [blame] | 2446 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
| 2447 | struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header); |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 2448 | ret = ocfs2_remove_value_outside(inode, &vb, header, |
| 2449 | ref_ci, ref_root_bh); |
Tao Ma | a394425 | 2008-08-18 17:38:54 +0800 | [diff] [blame] | 2450 | } else |
Tao Ma | 47bca49 | 2009-08-18 11:43:42 +0800 | [diff] [blame] | 2451 | ret = ocfs2_iterate_xattr_index_block(inode, |
| 2452 | blk_bh, |
| 2453 | ocfs2_rm_xattr_cluster, |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 2454 | &args); |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2455 | |
| 2456 | return ret; |
| 2457 | } |
| 2458 | |
Tao Ma | 0841389 | 2008-08-29 09:00:19 +0800 | [diff] [blame] | 2459 | static int ocfs2_xattr_free_block(struct inode *inode, |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 2460 | u64 block, |
| 2461 | struct ocfs2_caching_info *ref_ci, |
| 2462 | struct buffer_head *ref_root_bh) |
Tao Ma | 0841389 | 2008-08-29 09:00:19 +0800 | [diff] [blame] | 2463 | { |
| 2464 | struct inode *xb_alloc_inode; |
| 2465 | struct buffer_head *xb_alloc_bh = NULL; |
| 2466 | struct buffer_head *blk_bh = NULL; |
| 2467 | struct ocfs2_xattr_block *xb; |
| 2468 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 2469 | handle_t *handle; |
| 2470 | int ret = 0; |
| 2471 | u64 blk, bg_blkno; |
| 2472 | u16 bit; |
| 2473 | |
Joel Becker | 4ae1d69 | 2008-11-13 14:49:18 -0800 | [diff] [blame] | 2474 | ret = ocfs2_read_xattr_block(inode, block, &blk_bh); |
Tao Ma | 0841389 | 2008-08-29 09:00:19 +0800 | [diff] [blame] | 2475 | if (ret < 0) { |
| 2476 | mlog_errno(ret); |
| 2477 | goto out; |
| 2478 | } |
| 2479 | |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 2480 | ret = ocfs2_xattr_block_remove(inode, blk_bh, ref_ci, ref_root_bh); |
Tao Ma | 0841389 | 2008-08-29 09:00:19 +0800 | [diff] [blame] | 2481 | if (ret < 0) { |
| 2482 | mlog_errno(ret); |
| 2483 | goto out; |
| 2484 | } |
| 2485 | |
Joel Becker | 4ae1d69 | 2008-11-13 14:49:18 -0800 | [diff] [blame] | 2486 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
Tao Ma | 0841389 | 2008-08-29 09:00:19 +0800 | [diff] [blame] | 2487 | blk = le64_to_cpu(xb->xb_blkno); |
| 2488 | bit = le16_to_cpu(xb->xb_suballoc_bit); |
Tao Ma | 74380c4 | 2010-03-22 14:20:18 +0800 | [diff] [blame] | 2489 | if (xb->xb_suballoc_loc) |
| 2490 | bg_blkno = le64_to_cpu(xb->xb_suballoc_loc); |
| 2491 | else |
| 2492 | bg_blkno = ocfs2_which_suballoc_group(blk, bit); |
Tao Ma | 0841389 | 2008-08-29 09:00:19 +0800 | [diff] [blame] | 2493 | |
| 2494 | xb_alloc_inode = ocfs2_get_system_file_inode(osb, |
| 2495 | EXTENT_ALLOC_SYSTEM_INODE, |
| 2496 | le16_to_cpu(xb->xb_suballoc_slot)); |
| 2497 | if (!xb_alloc_inode) { |
| 2498 | ret = -ENOMEM; |
| 2499 | mlog_errno(ret); |
| 2500 | goto out; |
| 2501 | } |
| 2502 | mutex_lock(&xb_alloc_inode->i_mutex); |
| 2503 | |
| 2504 | ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1); |
| 2505 | if (ret < 0) { |
| 2506 | mlog_errno(ret); |
| 2507 | goto out_mutex; |
| 2508 | } |
| 2509 | |
| 2510 | handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE); |
| 2511 | if (IS_ERR(handle)) { |
| 2512 | ret = PTR_ERR(handle); |
| 2513 | mlog_errno(ret); |
| 2514 | goto out_unlock; |
| 2515 | } |
| 2516 | |
| 2517 | ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh, |
| 2518 | bit, bg_blkno, 1); |
| 2519 | if (ret < 0) |
| 2520 | mlog_errno(ret); |
| 2521 | |
| 2522 | ocfs2_commit_trans(osb, handle); |
| 2523 | out_unlock: |
| 2524 | ocfs2_inode_unlock(xb_alloc_inode, 1); |
| 2525 | brelse(xb_alloc_bh); |
| 2526 | out_mutex: |
| 2527 | mutex_unlock(&xb_alloc_inode->i_mutex); |
| 2528 | iput(xb_alloc_inode); |
| 2529 | out: |
| 2530 | brelse(blk_bh); |
| 2531 | return ret; |
| 2532 | } |
| 2533 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2534 | /* |
| 2535 | * ocfs2_xattr_remove() |
| 2536 | * |
| 2537 | * Free extended attribute resources associated with this inode. |
| 2538 | */ |
| 2539 | int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh) |
| 2540 | { |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2541 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 2542 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 2543 | struct ocfs2_refcount_tree *ref_tree = NULL; |
| 2544 | struct buffer_head *ref_root_bh = NULL; |
| 2545 | struct ocfs2_caching_info *ref_ci = NULL; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2546 | handle_t *handle; |
| 2547 | int ret; |
| 2548 | |
Tiger Yang | 8154da3 | 2008-08-18 17:11:46 +0800 | [diff] [blame] | 2549 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
| 2550 | return 0; |
| 2551 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2552 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
| 2553 | return 0; |
| 2554 | |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 2555 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) { |
| 2556 | ret = ocfs2_lock_refcount_tree(OCFS2_SB(inode->i_sb), |
| 2557 | le64_to_cpu(di->i_refcount_loc), |
| 2558 | 1, &ref_tree, &ref_root_bh); |
| 2559 | if (ret) { |
| 2560 | mlog_errno(ret); |
| 2561 | goto out; |
| 2562 | } |
| 2563 | ref_ci = &ref_tree->rf_ci; |
| 2564 | |
| 2565 | } |
| 2566 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2567 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 2568 | ret = ocfs2_xattr_ibody_remove(inode, di_bh, |
| 2569 | ref_ci, ref_root_bh); |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2570 | if (ret < 0) { |
| 2571 | mlog_errno(ret); |
| 2572 | goto out; |
| 2573 | } |
| 2574 | } |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2575 | |
Tao Ma | 0841389 | 2008-08-29 09:00:19 +0800 | [diff] [blame] | 2576 | if (di->i_xattr_loc) { |
| 2577 | ret = ocfs2_xattr_free_block(inode, |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 2578 | le64_to_cpu(di->i_xattr_loc), |
| 2579 | ref_ci, ref_root_bh); |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2580 | if (ret < 0) { |
| 2581 | mlog_errno(ret); |
| 2582 | goto out; |
| 2583 | } |
| 2584 | } |
| 2585 | |
| 2586 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), |
| 2587 | OCFS2_INODE_UPDATE_CREDITS); |
| 2588 | if (IS_ERR(handle)) { |
| 2589 | ret = PTR_ERR(handle); |
| 2590 | mlog_errno(ret); |
| 2591 | goto out; |
| 2592 | } |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 2593 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, |
Joel Becker | 8400897 | 2008-12-09 16:11:49 -0800 | [diff] [blame] | 2594 | OCFS2_JOURNAL_ACCESS_WRITE); |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2595 | if (ret) { |
| 2596 | mlog_errno(ret); |
| 2597 | goto out_commit; |
| 2598 | } |
| 2599 | |
Tao Ma | 0841389 | 2008-08-29 09:00:19 +0800 | [diff] [blame] | 2600 | di->i_xattr_loc = 0; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2601 | |
| 2602 | spin_lock(&oi->ip_lock); |
| 2603 | oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL); |
| 2604 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); |
| 2605 | spin_unlock(&oi->ip_lock); |
| 2606 | |
Joel Becker | ec20cec | 2010-03-19 14:13:52 -0700 | [diff] [blame] | 2607 | ocfs2_journal_dirty(handle, di_bh); |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2608 | out_commit: |
| 2609 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
| 2610 | out: |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 2611 | if (ref_tree) |
| 2612 | ocfs2_unlock_refcount_tree(OCFS2_SB(inode->i_sb), ref_tree, 1); |
| 2613 | brelse(ref_root_bh); |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2614 | return ret; |
| 2615 | } |
| 2616 | |
| 2617 | static int ocfs2_xattr_has_space_inline(struct inode *inode, |
| 2618 | struct ocfs2_dinode *di) |
| 2619 | { |
| 2620 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 2621 | unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size; |
| 2622 | int free; |
| 2623 | |
| 2624 | if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE) |
| 2625 | return 0; |
| 2626 | |
| 2627 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
| 2628 | struct ocfs2_inline_data *idata = &di->id2.i_data; |
| 2629 | free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size); |
| 2630 | } else if (ocfs2_inode_is_fast_symlink(inode)) { |
| 2631 | free = ocfs2_fast_symlink_chars(inode->i_sb) - |
| 2632 | le64_to_cpu(di->i_size); |
| 2633 | } else { |
| 2634 | struct ocfs2_extent_list *el = &di->id2.i_list; |
| 2635 | free = (le16_to_cpu(el->l_count) - |
| 2636 | le16_to_cpu(el->l_next_free_rec)) * |
| 2637 | sizeof(struct ocfs2_extent_rec); |
| 2638 | } |
| 2639 | if (free >= xattrsize) |
| 2640 | return 1; |
| 2641 | |
| 2642 | return 0; |
| 2643 | } |
| 2644 | |
| 2645 | /* |
| 2646 | * ocfs2_xattr_ibody_find() |
| 2647 | * |
| 2648 | * Find extended attribute in inode block and |
| 2649 | * fill search info into struct ocfs2_xattr_search. |
| 2650 | */ |
| 2651 | static int ocfs2_xattr_ibody_find(struct inode *inode, |
| 2652 | int name_index, |
| 2653 | const char *name, |
| 2654 | struct ocfs2_xattr_search *xs) |
| 2655 | { |
| 2656 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 2657 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; |
| 2658 | int ret; |
| 2659 | int has_space = 0; |
| 2660 | |
| 2661 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) |
| 2662 | return 0; |
| 2663 | |
| 2664 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { |
| 2665 | down_read(&oi->ip_alloc_sem); |
| 2666 | has_space = ocfs2_xattr_has_space_inline(inode, di); |
| 2667 | up_read(&oi->ip_alloc_sem); |
| 2668 | if (!has_space) |
| 2669 | return 0; |
| 2670 | } |
| 2671 | |
| 2672 | xs->xattr_bh = xs->inode_bh; |
| 2673 | xs->end = (void *)di + inode->i_sb->s_blocksize; |
| 2674 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) |
| 2675 | xs->header = (struct ocfs2_xattr_header *) |
| 2676 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); |
| 2677 | else |
| 2678 | xs->header = (struct ocfs2_xattr_header *) |
| 2679 | (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size); |
| 2680 | xs->base = (void *)xs->header; |
| 2681 | xs->here = xs->header->xh_entries; |
| 2682 | |
| 2683 | /* Find the named attribute. */ |
| 2684 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { |
| 2685 | ret = ocfs2_xattr_find_entry(name_index, name, xs); |
| 2686 | if (ret && ret != -ENODATA) |
| 2687 | return ret; |
| 2688 | xs->not_found = ret; |
| 2689 | } |
| 2690 | |
| 2691 | return 0; |
| 2692 | } |
| 2693 | |
Joel Becker | 139ffac | 2009-08-19 11:09:17 -0700 | [diff] [blame] | 2694 | static int ocfs2_xattr_ibody_init(struct inode *inode, |
| 2695 | struct buffer_head *di_bh, |
| 2696 | struct ocfs2_xattr_set_ctxt *ctxt) |
| 2697 | { |
| 2698 | int ret; |
| 2699 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 2700 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; |
| 2701 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 2702 | unsigned int xattrsize = osb->s_xattr_inline_size; |
| 2703 | |
| 2704 | if (!ocfs2_xattr_has_space_inline(inode, di)) { |
| 2705 | ret = -ENOSPC; |
| 2706 | goto out; |
| 2707 | } |
| 2708 | |
| 2709 | ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), di_bh, |
| 2710 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 2711 | if (ret) { |
| 2712 | mlog_errno(ret); |
| 2713 | goto out; |
| 2714 | } |
| 2715 | |
| 2716 | /* |
| 2717 | * Adjust extent record count or inline data size |
| 2718 | * to reserve space for extended attribute. |
| 2719 | */ |
| 2720 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
| 2721 | struct ocfs2_inline_data *idata = &di->id2.i_data; |
| 2722 | le16_add_cpu(&idata->id_count, -xattrsize); |
| 2723 | } else if (!(ocfs2_inode_is_fast_symlink(inode))) { |
| 2724 | struct ocfs2_extent_list *el = &di->id2.i_list; |
| 2725 | le16_add_cpu(&el->l_count, -(xattrsize / |
| 2726 | sizeof(struct ocfs2_extent_rec))); |
| 2727 | } |
| 2728 | di->i_xattr_inline_size = cpu_to_le16(xattrsize); |
| 2729 | |
| 2730 | spin_lock(&oi->ip_lock); |
| 2731 | oi->ip_dyn_features |= OCFS2_INLINE_XATTR_FL|OCFS2_HAS_XATTR_FL; |
| 2732 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); |
| 2733 | spin_unlock(&oi->ip_lock); |
| 2734 | |
Joel Becker | ec20cec | 2010-03-19 14:13:52 -0700 | [diff] [blame] | 2735 | ocfs2_journal_dirty(ctxt->handle, di_bh); |
Joel Becker | 139ffac | 2009-08-19 11:09:17 -0700 | [diff] [blame] | 2736 | |
| 2737 | out: |
| 2738 | return ret; |
| 2739 | } |
| 2740 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2741 | /* |
| 2742 | * ocfs2_xattr_ibody_set() |
| 2743 | * |
| 2744 | * Set, replace or remove an extended attribute into inode block. |
| 2745 | * |
| 2746 | */ |
| 2747 | static int ocfs2_xattr_ibody_set(struct inode *inode, |
| 2748 | struct ocfs2_xattr_info *xi, |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 2749 | struct ocfs2_xattr_search *xs, |
| 2750 | struct ocfs2_xattr_set_ctxt *ctxt) |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2751 | { |
Joel Becker | 139ffac | 2009-08-19 11:09:17 -0700 | [diff] [blame] | 2752 | int ret; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2753 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 2754 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; |
Joel Becker | 139ffac | 2009-08-19 11:09:17 -0700 | [diff] [blame] | 2755 | struct ocfs2_xa_loc loc; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2756 | |
| 2757 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) |
| 2758 | return -ENOSPC; |
| 2759 | |
| 2760 | down_write(&oi->ip_alloc_sem); |
| 2761 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { |
| 2762 | if (!ocfs2_xattr_has_space_inline(inode, di)) { |
| 2763 | ret = -ENOSPC; |
| 2764 | goto out; |
| 2765 | } |
| 2766 | } |
| 2767 | |
Joel Becker | 139ffac | 2009-08-19 11:09:17 -0700 | [diff] [blame] | 2768 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { |
| 2769 | ret = ocfs2_xattr_ibody_init(inode, xs->inode_bh, ctxt); |
| 2770 | if (ret) { |
| 2771 | if (ret != -ENOSPC) |
| 2772 | mlog_errno(ret); |
| 2773 | goto out; |
| 2774 | } |
| 2775 | } |
| 2776 | |
| 2777 | ocfs2_init_dinode_xa_loc(&loc, inode, xs->inode_bh, |
| 2778 | xs->not_found ? NULL : xs->here); |
| 2779 | ret = ocfs2_xa_set(&loc, xi, ctxt); |
| 2780 | if (ret) { |
| 2781 | if (ret != -ENOSPC) |
| 2782 | mlog_errno(ret); |
| 2783 | goto out; |
| 2784 | } |
| 2785 | xs->here = loc.xl_entry; |
| 2786 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2787 | out: |
| 2788 | up_write(&oi->ip_alloc_sem); |
| 2789 | |
| 2790 | return ret; |
| 2791 | } |
| 2792 | |
| 2793 | /* |
| 2794 | * ocfs2_xattr_block_find() |
| 2795 | * |
| 2796 | * Find extended attribute in external block and |
| 2797 | * fill search info into struct ocfs2_xattr_search. |
| 2798 | */ |
| 2799 | static int ocfs2_xattr_block_find(struct inode *inode, |
| 2800 | int name_index, |
| 2801 | const char *name, |
| 2802 | struct ocfs2_xattr_search *xs) |
| 2803 | { |
| 2804 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; |
| 2805 | struct buffer_head *blk_bh = NULL; |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 2806 | struct ocfs2_xattr_block *xb; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2807 | int ret = 0; |
| 2808 | |
| 2809 | if (!di->i_xattr_loc) |
| 2810 | return ret; |
| 2811 | |
Joel Becker | 4ae1d69 | 2008-11-13 14:49:18 -0800 | [diff] [blame] | 2812 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
| 2813 | &blk_bh); |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2814 | if (ret < 0) { |
| 2815 | mlog_errno(ret); |
| 2816 | return ret; |
| 2817 | } |
Joel Becker | f6087fb | 2008-10-20 18:20:43 -0700 | [diff] [blame] | 2818 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2819 | xs->xattr_bh = blk_bh; |
Joel Becker | 4ae1d69 | 2008-11-13 14:49:18 -0800 | [diff] [blame] | 2820 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2821 | |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 2822 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
| 2823 | xs->header = &xb->xb_attrs.xb_header; |
| 2824 | xs->base = (void *)xs->header; |
| 2825 | xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size; |
| 2826 | xs->here = xs->header->xh_entries; |
| 2827 | |
| 2828 | ret = ocfs2_xattr_find_entry(name_index, name, xs); |
| 2829 | } else |
| 2830 | ret = ocfs2_xattr_index_block_find(inode, blk_bh, |
| 2831 | name_index, |
| 2832 | name, xs); |
| 2833 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2834 | if (ret && ret != -ENODATA) { |
| 2835 | xs->xattr_bh = NULL; |
| 2836 | goto cleanup; |
| 2837 | } |
| 2838 | xs->not_found = ret; |
| 2839 | return 0; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2840 | cleanup: |
| 2841 | brelse(blk_bh); |
| 2842 | |
| 2843 | return ret; |
| 2844 | } |
| 2845 | |
Joel Becker | d398154 | 2009-08-19 02:13:50 -0700 | [diff] [blame] | 2846 | static int ocfs2_create_xattr_block(struct inode *inode, |
Tao Ma | 5aea1f0 | 2009-08-18 11:43:24 +0800 | [diff] [blame] | 2847 | struct buffer_head *inode_bh, |
Joel Becker | d398154 | 2009-08-19 02:13:50 -0700 | [diff] [blame] | 2848 | struct ocfs2_xattr_set_ctxt *ctxt, |
| 2849 | int indexed, |
| 2850 | struct buffer_head **ret_bh) |
Tao Ma | 5aea1f0 | 2009-08-18 11:43:24 +0800 | [diff] [blame] | 2851 | { |
| 2852 | int ret; |
| 2853 | u16 suballoc_bit_start; |
| 2854 | u32 num_got; |
Joel Becker | 2b6cb57 | 2010-03-26 10:09:15 +0800 | [diff] [blame] | 2855 | u64 suballoc_loc, first_blkno; |
Tao Ma | 5aea1f0 | 2009-08-18 11:43:24 +0800 | [diff] [blame] | 2856 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)inode_bh->b_data; |
Tao Ma | 5aea1f0 | 2009-08-18 11:43:24 +0800 | [diff] [blame] | 2857 | struct buffer_head *new_bh = NULL; |
| 2858 | struct ocfs2_xattr_block *xblk; |
| 2859 | |
Joel Becker | d398154 | 2009-08-19 02:13:50 -0700 | [diff] [blame] | 2860 | ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), |
| 2861 | inode_bh, OCFS2_JOURNAL_ACCESS_CREATE); |
Tao Ma | 5aea1f0 | 2009-08-18 11:43:24 +0800 | [diff] [blame] | 2862 | if (ret < 0) { |
| 2863 | mlog_errno(ret); |
| 2864 | goto end; |
| 2865 | } |
| 2866 | |
Joel Becker | 1ed9b77 | 2010-05-06 13:59:06 +0800 | [diff] [blame] | 2867 | ret = ocfs2_claim_metadata(ctxt->handle, ctxt->meta_ac, 1, |
Joel Becker | 2b6cb57 | 2010-03-26 10:09:15 +0800 | [diff] [blame] | 2868 | &suballoc_loc, &suballoc_bit_start, |
| 2869 | &num_got, &first_blkno); |
Tao Ma | 5aea1f0 | 2009-08-18 11:43:24 +0800 | [diff] [blame] | 2870 | if (ret < 0) { |
| 2871 | mlog_errno(ret); |
| 2872 | goto end; |
| 2873 | } |
| 2874 | |
| 2875 | new_bh = sb_getblk(inode->i_sb, first_blkno); |
| 2876 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), new_bh); |
| 2877 | |
Joel Becker | d398154 | 2009-08-19 02:13:50 -0700 | [diff] [blame] | 2878 | ret = ocfs2_journal_access_xb(ctxt->handle, INODE_CACHE(inode), |
Tao Ma | 5aea1f0 | 2009-08-18 11:43:24 +0800 | [diff] [blame] | 2879 | new_bh, |
| 2880 | OCFS2_JOURNAL_ACCESS_CREATE); |
| 2881 | if (ret < 0) { |
| 2882 | mlog_errno(ret); |
| 2883 | goto end; |
| 2884 | } |
| 2885 | |
| 2886 | /* Initialize ocfs2_xattr_block */ |
| 2887 | xblk = (struct ocfs2_xattr_block *)new_bh->b_data; |
| 2888 | memset(xblk, 0, inode->i_sb->s_blocksize); |
| 2889 | strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE); |
Joel Becker | d398154 | 2009-08-19 02:13:50 -0700 | [diff] [blame] | 2890 | xblk->xb_suballoc_slot = cpu_to_le16(ctxt->meta_ac->ac_alloc_slot); |
Joel Becker | 2b6cb57 | 2010-03-26 10:09:15 +0800 | [diff] [blame] | 2891 | xblk->xb_suballoc_loc = cpu_to_le64(suballoc_loc); |
Tao Ma | 5aea1f0 | 2009-08-18 11:43:24 +0800 | [diff] [blame] | 2892 | xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start); |
Joel Becker | 1ed9b77 | 2010-05-06 13:59:06 +0800 | [diff] [blame] | 2893 | xblk->xb_fs_generation = |
| 2894 | cpu_to_le32(OCFS2_SB(inode->i_sb)->fs_generation); |
Tao Ma | 5aea1f0 | 2009-08-18 11:43:24 +0800 | [diff] [blame] | 2895 | xblk->xb_blkno = cpu_to_le64(first_blkno); |
Tao Ma | a7fe7a3 | 2009-08-18 11:43:52 +0800 | [diff] [blame] | 2896 | if (indexed) { |
| 2897 | struct ocfs2_xattr_tree_root *xr = &xblk->xb_attrs.xb_root; |
| 2898 | xr->xt_clusters = cpu_to_le32(1); |
| 2899 | xr->xt_last_eb_blk = 0; |
| 2900 | xr->xt_list.l_tree_depth = 0; |
| 2901 | xr->xt_list.l_count = cpu_to_le16( |
| 2902 | ocfs2_xattr_recs_per_xb(inode->i_sb)); |
| 2903 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); |
| 2904 | xblk->xb_flags = cpu_to_le16(OCFS2_XATTR_INDEXED); |
| 2905 | } |
Joel Becker | d398154 | 2009-08-19 02:13:50 -0700 | [diff] [blame] | 2906 | ocfs2_journal_dirty(ctxt->handle, new_bh); |
Tao Ma | a7fe7a3 | 2009-08-18 11:43:52 +0800 | [diff] [blame] | 2907 | |
Joel Becker | d398154 | 2009-08-19 02:13:50 -0700 | [diff] [blame] | 2908 | /* Add it to the inode */ |
Tao Ma | 5aea1f0 | 2009-08-18 11:43:24 +0800 | [diff] [blame] | 2909 | di->i_xattr_loc = cpu_to_le64(first_blkno); |
Joel Becker | d398154 | 2009-08-19 02:13:50 -0700 | [diff] [blame] | 2910 | |
| 2911 | spin_lock(&OCFS2_I(inode)->ip_lock); |
| 2912 | OCFS2_I(inode)->ip_dyn_features |= OCFS2_HAS_XATTR_FL; |
| 2913 | di->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features); |
| 2914 | spin_unlock(&OCFS2_I(inode)->ip_lock); |
| 2915 | |
| 2916 | ocfs2_journal_dirty(ctxt->handle, inode_bh); |
Tao Ma | 5aea1f0 | 2009-08-18 11:43:24 +0800 | [diff] [blame] | 2917 | |
| 2918 | *ret_bh = new_bh; |
| 2919 | new_bh = NULL; |
| 2920 | |
| 2921 | end: |
| 2922 | brelse(new_bh); |
| 2923 | return ret; |
| 2924 | } |
| 2925 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2926 | /* |
| 2927 | * ocfs2_xattr_block_set() |
| 2928 | * |
| 2929 | * Set, replace or remove an extended attribute into external block. |
| 2930 | * |
| 2931 | */ |
| 2932 | static int ocfs2_xattr_block_set(struct inode *inode, |
| 2933 | struct ocfs2_xattr_info *xi, |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 2934 | struct ocfs2_xattr_search *xs, |
| 2935 | struct ocfs2_xattr_set_ctxt *ctxt) |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2936 | { |
| 2937 | struct buffer_head *new_bh = NULL; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2938 | struct ocfs2_xattr_block *xblk = NULL; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2939 | int ret; |
Joel Becker | d398154 | 2009-08-19 02:13:50 -0700 | [diff] [blame] | 2940 | struct ocfs2_xa_loc loc; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2941 | |
| 2942 | if (!xs->xattr_bh) { |
Joel Becker | d398154 | 2009-08-19 02:13:50 -0700 | [diff] [blame] | 2943 | ret = ocfs2_create_xattr_block(inode, xs->inode_bh, ctxt, |
| 2944 | 0, &new_bh); |
Tao Ma | 5aea1f0 | 2009-08-18 11:43:24 +0800 | [diff] [blame] | 2945 | if (ret) { |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2946 | mlog_errno(ret); |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 2947 | goto end; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2948 | } |
| 2949 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2950 | xs->xattr_bh = new_bh; |
Tao Ma | 5aea1f0 | 2009-08-18 11:43:24 +0800 | [diff] [blame] | 2951 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2952 | xs->header = &xblk->xb_attrs.xb_header; |
| 2953 | xs->base = (void *)xs->header; |
| 2954 | xs->end = (void *)xblk + inode->i_sb->s_blocksize; |
| 2955 | xs->here = xs->header->xh_entries; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 2956 | } else |
| 2957 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
| 2958 | |
| 2959 | if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) { |
Joel Becker | d398154 | 2009-08-19 02:13:50 -0700 | [diff] [blame] | 2960 | ocfs2_init_xattr_block_xa_loc(&loc, inode, xs->xattr_bh, |
| 2961 | xs->not_found ? NULL : xs->here); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 2962 | |
Joel Becker | d398154 | 2009-08-19 02:13:50 -0700 | [diff] [blame] | 2963 | ret = ocfs2_xa_set(&loc, xi, ctxt); |
| 2964 | if (!ret) |
| 2965 | xs->here = loc.xl_entry; |
Tao Ma | 5f5261a | 2010-05-13 22:49:05 +0800 | [diff] [blame] | 2966 | else if ((ret != -ENOSPC) || ctxt->set_abort) |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 2967 | goto end; |
Joel Becker | d398154 | 2009-08-19 02:13:50 -0700 | [diff] [blame] | 2968 | else { |
| 2969 | ret = ocfs2_xattr_create_index_block(inode, xs, ctxt); |
| 2970 | if (ret) |
| 2971 | goto end; |
| 2972 | } |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2973 | } |
| 2974 | |
Joel Becker | d398154 | 2009-08-19 02:13:50 -0700 | [diff] [blame] | 2975 | if (le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED) |
| 2976 | ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 2977 | |
| 2978 | end: |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2979 | return ret; |
| 2980 | } |
| 2981 | |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 2982 | /* Check whether the new xattr can be inserted into the inode. */ |
| 2983 | static int ocfs2_xattr_can_be_in_inode(struct inode *inode, |
| 2984 | struct ocfs2_xattr_info *xi, |
| 2985 | struct ocfs2_xattr_search *xs) |
| 2986 | { |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 2987 | struct ocfs2_xattr_entry *last; |
| 2988 | int free, i; |
| 2989 | size_t min_offs = xs->end - xs->base; |
| 2990 | |
| 2991 | if (!xs->header) |
| 2992 | return 0; |
| 2993 | |
| 2994 | last = xs->header->xh_entries; |
| 2995 | |
| 2996 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { |
| 2997 | size_t offs = le16_to_cpu(last->xe_name_offset); |
| 2998 | if (offs < min_offs) |
| 2999 | min_offs = offs; |
| 3000 | last += 1; |
| 3001 | } |
| 3002 | |
Tiger Yang | 4442f51 | 2009-02-20 11:11:50 +0800 | [diff] [blame] | 3003 | free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP; |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3004 | if (free < 0) |
| 3005 | return 0; |
| 3006 | |
| 3007 | BUG_ON(!xs->not_found); |
| 3008 | |
Joel Becker | 199799a | 2009-08-14 19:04:15 -0700 | [diff] [blame] | 3009 | if (free >= (sizeof(struct ocfs2_xattr_entry) + namevalue_size_xi(xi))) |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3010 | return 1; |
| 3011 | |
| 3012 | return 0; |
| 3013 | } |
| 3014 | |
| 3015 | static int ocfs2_calc_xattr_set_need(struct inode *inode, |
| 3016 | struct ocfs2_dinode *di, |
| 3017 | struct ocfs2_xattr_info *xi, |
| 3018 | struct ocfs2_xattr_search *xis, |
| 3019 | struct ocfs2_xattr_search *xbs, |
| 3020 | int *clusters_need, |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3021 | int *meta_need, |
| 3022 | int *credits_need) |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3023 | { |
| 3024 | int ret = 0, old_in_xb = 0; |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3025 | int clusters_add = 0, meta_add = 0, credits = 0; |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3026 | struct buffer_head *bh = NULL; |
| 3027 | struct ocfs2_xattr_block *xb = NULL; |
| 3028 | struct ocfs2_xattr_entry *xe = NULL; |
| 3029 | struct ocfs2_xattr_value_root *xv = NULL; |
| 3030 | char *base = NULL; |
| 3031 | int name_offset, name_len = 0; |
| 3032 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, |
Joel Becker | 6b240ff | 2009-08-14 18:02:52 -0700 | [diff] [blame] | 3033 | xi->xi_value_len); |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3034 | u64 value_size; |
| 3035 | |
Tao Ma | 71d548a | 2008-12-05 06:20:54 +0800 | [diff] [blame] | 3036 | /* |
| 3037 | * Calculate the clusters we need to write. |
| 3038 | * No matter whether we replace an old one or add a new one, |
| 3039 | * we need this for writing. |
| 3040 | */ |
Joel Becker | 6b240ff | 2009-08-14 18:02:52 -0700 | [diff] [blame] | 3041 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) |
Tao Ma | 71d548a | 2008-12-05 06:20:54 +0800 | [diff] [blame] | 3042 | credits += new_clusters * |
| 3043 | ocfs2_clusters_to_blocks(inode->i_sb, 1); |
| 3044 | |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3045 | if (xis->not_found && xbs->not_found) { |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3046 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
| 3047 | |
Joel Becker | 6b240ff | 2009-08-14 18:02:52 -0700 | [diff] [blame] | 3048 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3049 | clusters_add += new_clusters; |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3050 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
| 3051 | &def_xv.xv.xr_list, |
| 3052 | new_clusters); |
| 3053 | } |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3054 | |
| 3055 | goto meta_guess; |
| 3056 | } |
| 3057 | |
| 3058 | if (!xis->not_found) { |
| 3059 | xe = xis->here; |
| 3060 | name_offset = le16_to_cpu(xe->xe_name_offset); |
| 3061 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); |
| 3062 | base = xis->base; |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3063 | credits += OCFS2_INODE_UPDATE_CREDITS; |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3064 | } else { |
Joel Becker | 970e493 | 2008-11-13 14:49:19 -0800 | [diff] [blame] | 3065 | int i, block_off = 0; |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3066 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; |
| 3067 | xe = xbs->here; |
| 3068 | name_offset = le16_to_cpu(xe->xe_name_offset); |
| 3069 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); |
| 3070 | i = xbs->here - xbs->header->xh_entries; |
| 3071 | old_in_xb = 1; |
| 3072 | |
| 3073 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { |
Tao Ma | fd68a89 | 2009-08-18 11:43:21 +0800 | [diff] [blame] | 3074 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3075 | bucket_xh(xbs->bucket), |
| 3076 | i, &block_off, |
| 3077 | &name_offset); |
| 3078 | base = bucket_block(xbs->bucket, block_off); |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3079 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
| 3080 | } else { |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3081 | base = xbs->base; |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3082 | credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS; |
| 3083 | } |
| 3084 | } |
| 3085 | |
| 3086 | /* |
| 3087 | * delete a xattr doesn't need metadata and cluster allocation. |
| 3088 | * so just calculate the credits and return. |
| 3089 | * |
| 3090 | * The credits for removing the value tree will be extended |
| 3091 | * by ocfs2_remove_extent itself. |
| 3092 | */ |
Joel Becker | 6b240ff | 2009-08-14 18:02:52 -0700 | [diff] [blame] | 3093 | if (!xi->xi_value) { |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3094 | if (!ocfs2_xattr_is_local(xe)) |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 3095 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3096 | |
| 3097 | goto out; |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3098 | } |
| 3099 | |
| 3100 | /* do cluster allocation guess first. */ |
| 3101 | value_size = le64_to_cpu(xe->xe_value_size); |
| 3102 | |
| 3103 | if (old_in_xb) { |
| 3104 | /* |
| 3105 | * In xattr set, we always try to set the xe in inode first, |
| 3106 | * so if it can be inserted into inode successfully, the old |
| 3107 | * one will be removed from the xattr block, and this xattr |
| 3108 | * will be inserted into inode as a new xattr in inode. |
| 3109 | */ |
| 3110 | if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) { |
| 3111 | clusters_add += new_clusters; |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 3112 | credits += ocfs2_remove_extent_credits(inode->i_sb) + |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3113 | OCFS2_INODE_UPDATE_CREDITS; |
| 3114 | if (!ocfs2_xattr_is_local(xe)) |
| 3115 | credits += ocfs2_calc_extend_credits( |
| 3116 | inode->i_sb, |
| 3117 | &def_xv.xv.xr_list, |
| 3118 | new_clusters); |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3119 | goto out; |
| 3120 | } |
| 3121 | } |
| 3122 | |
Joel Becker | 6b240ff | 2009-08-14 18:02:52 -0700 | [diff] [blame] | 3123 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3124 | /* the new values will be stored outside. */ |
| 3125 | u32 old_clusters = 0; |
| 3126 | |
| 3127 | if (!ocfs2_xattr_is_local(xe)) { |
| 3128 | old_clusters = ocfs2_clusters_for_bytes(inode->i_sb, |
| 3129 | value_size); |
| 3130 | xv = (struct ocfs2_xattr_value_root *) |
| 3131 | (base + name_offset + name_len); |
Tao Ma | 97aff52 | 2008-11-19 16:48:41 +0800 | [diff] [blame] | 3132 | value_size = OCFS2_XATTR_ROOT_SIZE; |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3133 | } else |
| 3134 | xv = &def_xv.xv; |
| 3135 | |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3136 | if (old_clusters >= new_clusters) { |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 3137 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3138 | goto out; |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3139 | } else { |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3140 | meta_add += ocfs2_extend_meta_needed(&xv->xr_list); |
| 3141 | clusters_add += new_clusters - old_clusters; |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3142 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
| 3143 | &xv->xr_list, |
| 3144 | new_clusters - |
| 3145 | old_clusters); |
Tao Ma | 97aff52 | 2008-11-19 16:48:41 +0800 | [diff] [blame] | 3146 | if (value_size >= OCFS2_XATTR_ROOT_SIZE) |
| 3147 | goto out; |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3148 | } |
| 3149 | } else { |
| 3150 | /* |
| 3151 | * Now the new value will be stored inside. So if the new |
| 3152 | * value is smaller than the size of value root or the old |
| 3153 | * value, we don't need any allocation, otherwise we have |
| 3154 | * to guess metadata allocation. |
| 3155 | */ |
Joel Becker | 6b240ff | 2009-08-14 18:02:52 -0700 | [diff] [blame] | 3156 | if ((ocfs2_xattr_is_local(xe) && |
| 3157 | (value_size >= xi->xi_value_len)) || |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3158 | (!ocfs2_xattr_is_local(xe) && |
Joel Becker | 6b240ff | 2009-08-14 18:02:52 -0700 | [diff] [blame] | 3159 | OCFS2_XATTR_ROOT_SIZE >= xi->xi_value_len)) |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3160 | goto out; |
| 3161 | } |
| 3162 | |
| 3163 | meta_guess: |
| 3164 | /* calculate metadata allocation. */ |
| 3165 | if (di->i_xattr_loc) { |
| 3166 | if (!xbs->xattr_bh) { |
Joel Becker | 4ae1d69 | 2008-11-13 14:49:18 -0800 | [diff] [blame] | 3167 | ret = ocfs2_read_xattr_block(inode, |
| 3168 | le64_to_cpu(di->i_xattr_loc), |
| 3169 | &bh); |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3170 | if (ret) { |
| 3171 | mlog_errno(ret); |
| 3172 | goto out; |
| 3173 | } |
| 3174 | |
| 3175 | xb = (struct ocfs2_xattr_block *)bh->b_data; |
| 3176 | } else |
| 3177 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; |
| 3178 | |
Tao Ma | 90cb546 | 2008-12-05 06:20:56 +0800 | [diff] [blame] | 3179 | /* |
| 3180 | * If there is already an xattr tree, good, we can calculate |
| 3181 | * like other b-trees. Otherwise we may have the chance of |
| 3182 | * create a tree, the credit calculation is borrowed from |
| 3183 | * ocfs2_calc_extend_credits with root_el = NULL. And the |
| 3184 | * new tree will be cluster based, so no meta is needed. |
| 3185 | */ |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3186 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { |
| 3187 | struct ocfs2_extent_list *el = |
| 3188 | &xb->xb_attrs.xb_root.xt_list; |
| 3189 | meta_add += ocfs2_extend_meta_needed(el); |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3190 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
| 3191 | el, 1); |
Tao Ma | 90cb546 | 2008-12-05 06:20:56 +0800 | [diff] [blame] | 3192 | } else |
| 3193 | credits += OCFS2_SUBALLOC_ALLOC + 1; |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3194 | |
| 3195 | /* |
| 3196 | * This cluster will be used either for new bucket or for |
| 3197 | * new xattr block. |
| 3198 | * If the cluster size is the same as the bucket size, one |
| 3199 | * more is needed since we may need to extend the bucket |
| 3200 | * also. |
| 3201 | */ |
| 3202 | clusters_add += 1; |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3203 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3204 | if (OCFS2_XATTR_BUCKET_SIZE == |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3205 | OCFS2_SB(inode->i_sb)->s_clustersize) { |
| 3206 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3207 | clusters_add += 1; |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3208 | } |
| 3209 | } else { |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3210 | meta_add += 1; |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3211 | credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
| 3212 | } |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3213 | out: |
| 3214 | if (clusters_need) |
| 3215 | *clusters_need = clusters_add; |
| 3216 | if (meta_need) |
| 3217 | *meta_need = meta_add; |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3218 | if (credits_need) |
| 3219 | *credits_need = credits; |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3220 | brelse(bh); |
| 3221 | return ret; |
| 3222 | } |
| 3223 | |
| 3224 | static int ocfs2_init_xattr_set_ctxt(struct inode *inode, |
| 3225 | struct ocfs2_dinode *di, |
| 3226 | struct ocfs2_xattr_info *xi, |
| 3227 | struct ocfs2_xattr_search *xis, |
| 3228 | struct ocfs2_xattr_search *xbs, |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3229 | struct ocfs2_xattr_set_ctxt *ctxt, |
Tao Ma | 492a8a3 | 2009-08-18 11:43:17 +0800 | [diff] [blame] | 3230 | int extra_meta, |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3231 | int *credits) |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3232 | { |
| 3233 | int clusters_add, meta_add, ret; |
| 3234 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 3235 | |
| 3236 | memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt)); |
| 3237 | |
| 3238 | ocfs2_init_dealloc_ctxt(&ctxt->dealloc); |
| 3239 | |
| 3240 | ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs, |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3241 | &clusters_add, &meta_add, credits); |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3242 | if (ret) { |
| 3243 | mlog_errno(ret); |
| 3244 | return ret; |
| 3245 | } |
| 3246 | |
Tao Ma | 492a8a3 | 2009-08-18 11:43:17 +0800 | [diff] [blame] | 3247 | meta_add += extra_meta; |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 3248 | trace_ocfs2_init_xattr_set_ctxt(xi->xi_name, meta_add, |
| 3249 | clusters_add, *credits); |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3250 | |
| 3251 | if (meta_add) { |
| 3252 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, |
| 3253 | &ctxt->meta_ac); |
| 3254 | if (ret) { |
| 3255 | mlog_errno(ret); |
| 3256 | goto out; |
| 3257 | } |
| 3258 | } |
| 3259 | |
| 3260 | if (clusters_add) { |
| 3261 | ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac); |
| 3262 | if (ret) |
| 3263 | mlog_errno(ret); |
| 3264 | } |
| 3265 | out: |
| 3266 | if (ret) { |
| 3267 | if (ctxt->meta_ac) { |
| 3268 | ocfs2_free_alloc_context(ctxt->meta_ac); |
| 3269 | ctxt->meta_ac = NULL; |
| 3270 | } |
| 3271 | |
| 3272 | /* |
| 3273 | * We cannot have an error and a non null ctxt->data_ac. |
| 3274 | */ |
| 3275 | } |
| 3276 | |
| 3277 | return ret; |
| 3278 | } |
| 3279 | |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3280 | static int __ocfs2_xattr_set_handle(struct inode *inode, |
| 3281 | struct ocfs2_dinode *di, |
| 3282 | struct ocfs2_xattr_info *xi, |
| 3283 | struct ocfs2_xattr_search *xis, |
| 3284 | struct ocfs2_xattr_search *xbs, |
| 3285 | struct ocfs2_xattr_set_ctxt *ctxt) |
| 3286 | { |
Tao Ma | 9f868f1 | 2008-11-19 16:48:42 +0800 | [diff] [blame] | 3287 | int ret = 0, credits, old_found; |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3288 | |
Joel Becker | 6b240ff | 2009-08-14 18:02:52 -0700 | [diff] [blame] | 3289 | if (!xi->xi_value) { |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3290 | /* Remove existing extended attribute */ |
| 3291 | if (!xis->not_found) |
| 3292 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); |
| 3293 | else if (!xbs->not_found) |
| 3294 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); |
| 3295 | } else { |
| 3296 | /* We always try to set extended attribute into inode first*/ |
| 3297 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); |
| 3298 | if (!ret && !xbs->not_found) { |
| 3299 | /* |
| 3300 | * If succeed and that extended attribute existing in |
| 3301 | * external block, then we will remove it. |
| 3302 | */ |
Joel Becker | 6b240ff | 2009-08-14 18:02:52 -0700 | [diff] [blame] | 3303 | xi->xi_value = NULL; |
| 3304 | xi->xi_value_len = 0; |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3305 | |
Tao Ma | 9f868f1 | 2008-11-19 16:48:42 +0800 | [diff] [blame] | 3306 | old_found = xis->not_found; |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3307 | xis->not_found = -ENODATA; |
| 3308 | ret = ocfs2_calc_xattr_set_need(inode, |
| 3309 | di, |
| 3310 | xi, |
| 3311 | xis, |
| 3312 | xbs, |
| 3313 | NULL, |
| 3314 | NULL, |
| 3315 | &credits); |
Tao Ma | 9f868f1 | 2008-11-19 16:48:42 +0800 | [diff] [blame] | 3316 | xis->not_found = old_found; |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3317 | if (ret) { |
| 3318 | mlog_errno(ret); |
| 3319 | goto out; |
| 3320 | } |
| 3321 | |
Tao Ma | c901fb0 | 2010-04-26 14:34:57 +0800 | [diff] [blame] | 3322 | ret = ocfs2_extend_trans(ctxt->handle, credits); |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3323 | if (ret) { |
| 3324 | mlog_errno(ret); |
| 3325 | goto out; |
| 3326 | } |
| 3327 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); |
Tao Ma | 5f5261a | 2010-05-13 22:49:05 +0800 | [diff] [blame] | 3328 | } else if ((ret == -ENOSPC) && !ctxt->set_abort) { |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3329 | if (di->i_xattr_loc && !xbs->xattr_bh) { |
| 3330 | ret = ocfs2_xattr_block_find(inode, |
Joel Becker | 6b240ff | 2009-08-14 18:02:52 -0700 | [diff] [blame] | 3331 | xi->xi_name_index, |
| 3332 | xi->xi_name, xbs); |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3333 | if (ret) |
| 3334 | goto out; |
| 3335 | |
Tao Ma | 9f868f1 | 2008-11-19 16:48:42 +0800 | [diff] [blame] | 3336 | old_found = xis->not_found; |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3337 | xis->not_found = -ENODATA; |
| 3338 | ret = ocfs2_calc_xattr_set_need(inode, |
| 3339 | di, |
| 3340 | xi, |
| 3341 | xis, |
| 3342 | xbs, |
| 3343 | NULL, |
| 3344 | NULL, |
| 3345 | &credits); |
Tao Ma | 9f868f1 | 2008-11-19 16:48:42 +0800 | [diff] [blame] | 3346 | xis->not_found = old_found; |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3347 | if (ret) { |
| 3348 | mlog_errno(ret); |
| 3349 | goto out; |
| 3350 | } |
| 3351 | |
Tao Ma | c901fb0 | 2010-04-26 14:34:57 +0800 | [diff] [blame] | 3352 | ret = ocfs2_extend_trans(ctxt->handle, credits); |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3353 | if (ret) { |
| 3354 | mlog_errno(ret); |
| 3355 | goto out; |
| 3356 | } |
| 3357 | } |
| 3358 | /* |
| 3359 | * If no space in inode, we will set extended attribute |
| 3360 | * into external block. |
| 3361 | */ |
| 3362 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); |
| 3363 | if (ret) |
| 3364 | goto out; |
| 3365 | if (!xis->not_found) { |
| 3366 | /* |
| 3367 | * If succeed and that extended attribute |
| 3368 | * existing in inode, we will remove it. |
| 3369 | */ |
Joel Becker | 6b240ff | 2009-08-14 18:02:52 -0700 | [diff] [blame] | 3370 | xi->xi_value = NULL; |
| 3371 | xi->xi_value_len = 0; |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3372 | xbs->not_found = -ENODATA; |
| 3373 | ret = ocfs2_calc_xattr_set_need(inode, |
| 3374 | di, |
| 3375 | xi, |
| 3376 | xis, |
| 3377 | xbs, |
| 3378 | NULL, |
| 3379 | NULL, |
| 3380 | &credits); |
| 3381 | if (ret) { |
| 3382 | mlog_errno(ret); |
| 3383 | goto out; |
| 3384 | } |
| 3385 | |
Tao Ma | c901fb0 | 2010-04-26 14:34:57 +0800 | [diff] [blame] | 3386 | ret = ocfs2_extend_trans(ctxt->handle, credits); |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3387 | if (ret) { |
| 3388 | mlog_errno(ret); |
| 3389 | goto out; |
| 3390 | } |
| 3391 | ret = ocfs2_xattr_ibody_set(inode, xi, |
| 3392 | xis, ctxt); |
| 3393 | } |
| 3394 | } |
| 3395 | } |
| 3396 | |
Tao Ma | 4b3f620 | 2008-12-05 06:20:55 +0800 | [diff] [blame] | 3397 | if (!ret) { |
| 3398 | /* Update inode ctime. */ |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 3399 | ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), |
Tao Ma | 89a907a | 2009-02-17 04:39:28 +0800 | [diff] [blame] | 3400 | xis->inode_bh, |
| 3401 | OCFS2_JOURNAL_ACCESS_WRITE); |
Tao Ma | 4b3f620 | 2008-12-05 06:20:55 +0800 | [diff] [blame] | 3402 | if (ret) { |
| 3403 | mlog_errno(ret); |
| 3404 | goto out; |
| 3405 | } |
| 3406 | |
| 3407 | inode->i_ctime = CURRENT_TIME; |
| 3408 | di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); |
| 3409 | di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); |
| 3410 | ocfs2_journal_dirty(ctxt->handle, xis->inode_bh); |
| 3411 | } |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3412 | out: |
| 3413 | return ret; |
| 3414 | } |
| 3415 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 3416 | /* |
Tiger Yang | 6c3faba | 2008-11-14 11:16:03 +0800 | [diff] [blame] | 3417 | * This function only called duing creating inode |
| 3418 | * for init security/acl xattrs of the new inode. |
Tiger Yang | 008aafa | 2008-12-09 16:43:08 +0800 | [diff] [blame] | 3419 | * All transanction credits have been reserved in mknod. |
Tiger Yang | 6c3faba | 2008-11-14 11:16:03 +0800 | [diff] [blame] | 3420 | */ |
| 3421 | int ocfs2_xattr_set_handle(handle_t *handle, |
| 3422 | struct inode *inode, |
| 3423 | struct buffer_head *di_bh, |
| 3424 | int name_index, |
| 3425 | const char *name, |
| 3426 | const void *value, |
| 3427 | size_t value_len, |
| 3428 | int flags, |
| 3429 | struct ocfs2_alloc_context *meta_ac, |
| 3430 | struct ocfs2_alloc_context *data_ac) |
| 3431 | { |
| 3432 | struct ocfs2_dinode *di; |
| 3433 | int ret; |
| 3434 | |
| 3435 | struct ocfs2_xattr_info xi = { |
Joel Becker | 6b240ff | 2009-08-14 18:02:52 -0700 | [diff] [blame] | 3436 | .xi_name_index = name_index, |
| 3437 | .xi_name = name, |
Joel Becker | 18853b9 | 2009-08-14 18:17:07 -0700 | [diff] [blame] | 3438 | .xi_name_len = strlen(name), |
Joel Becker | 6b240ff | 2009-08-14 18:02:52 -0700 | [diff] [blame] | 3439 | .xi_value = value, |
| 3440 | .xi_value_len = value_len, |
Tiger Yang | 6c3faba | 2008-11-14 11:16:03 +0800 | [diff] [blame] | 3441 | }; |
| 3442 | |
| 3443 | struct ocfs2_xattr_search xis = { |
| 3444 | .not_found = -ENODATA, |
| 3445 | }; |
| 3446 | |
| 3447 | struct ocfs2_xattr_search xbs = { |
| 3448 | .not_found = -ENODATA, |
| 3449 | }; |
| 3450 | |
| 3451 | struct ocfs2_xattr_set_ctxt ctxt = { |
| 3452 | .handle = handle, |
| 3453 | .meta_ac = meta_ac, |
| 3454 | .data_ac = data_ac, |
| 3455 | }; |
| 3456 | |
| 3457 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
| 3458 | return -EOPNOTSUPP; |
| 3459 | |
Tiger Yang | 008aafa | 2008-12-09 16:43:08 +0800 | [diff] [blame] | 3460 | /* |
| 3461 | * In extreme situation, may need xattr bucket when |
| 3462 | * block size is too small. And we have already reserved |
| 3463 | * the credits for bucket in mknod. |
| 3464 | */ |
| 3465 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) { |
| 3466 | xbs.bucket = ocfs2_xattr_bucket_new(inode); |
| 3467 | if (!xbs.bucket) { |
| 3468 | mlog_errno(-ENOMEM); |
| 3469 | return -ENOMEM; |
| 3470 | } |
| 3471 | } |
| 3472 | |
Tiger Yang | 6c3faba | 2008-11-14 11:16:03 +0800 | [diff] [blame] | 3473 | xis.inode_bh = xbs.inode_bh = di_bh; |
| 3474 | di = (struct ocfs2_dinode *)di_bh->b_data; |
| 3475 | |
| 3476 | down_write(&OCFS2_I(inode)->ip_xattr_sem); |
| 3477 | |
| 3478 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); |
| 3479 | if (ret) |
| 3480 | goto cleanup; |
| 3481 | if (xis.not_found) { |
| 3482 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); |
| 3483 | if (ret) |
| 3484 | goto cleanup; |
| 3485 | } |
| 3486 | |
| 3487 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); |
| 3488 | |
| 3489 | cleanup: |
| 3490 | up_write(&OCFS2_I(inode)->ip_xattr_sem); |
| 3491 | brelse(xbs.xattr_bh); |
Tiger Yang | 008aafa | 2008-12-09 16:43:08 +0800 | [diff] [blame] | 3492 | ocfs2_xattr_bucket_free(xbs.bucket); |
Tiger Yang | 6c3faba | 2008-11-14 11:16:03 +0800 | [diff] [blame] | 3493 | |
| 3494 | return ret; |
| 3495 | } |
| 3496 | |
| 3497 | /* |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 3498 | * ocfs2_xattr_set() |
| 3499 | * |
| 3500 | * Set, replace or remove an extended attribute for this inode. |
| 3501 | * value is NULL to remove an existing extended attribute, else either |
| 3502 | * create or replace an extended attribute. |
| 3503 | */ |
| 3504 | int ocfs2_xattr_set(struct inode *inode, |
| 3505 | int name_index, |
| 3506 | const char *name, |
| 3507 | const void *value, |
| 3508 | size_t value_len, |
| 3509 | int flags) |
| 3510 | { |
| 3511 | struct buffer_head *di_bh = NULL; |
| 3512 | struct ocfs2_dinode *di; |
Tao Ma | 492a8a3 | 2009-08-18 11:43:17 +0800 | [diff] [blame] | 3513 | int ret, credits, ref_meta = 0, ref_credits = 0; |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3514 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3515 | struct inode *tl_inode = osb->osb_tl_inode; |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3516 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; |
Tao Ma | 492a8a3 | 2009-08-18 11:43:17 +0800 | [diff] [blame] | 3517 | struct ocfs2_refcount_tree *ref_tree = NULL; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 3518 | |
| 3519 | struct ocfs2_xattr_info xi = { |
Joel Becker | 6b240ff | 2009-08-14 18:02:52 -0700 | [diff] [blame] | 3520 | .xi_name_index = name_index, |
| 3521 | .xi_name = name, |
Joel Becker | 18853b9 | 2009-08-14 18:17:07 -0700 | [diff] [blame] | 3522 | .xi_name_len = strlen(name), |
Joel Becker | 6b240ff | 2009-08-14 18:02:52 -0700 | [diff] [blame] | 3523 | .xi_value = value, |
| 3524 | .xi_value_len = value_len, |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 3525 | }; |
| 3526 | |
| 3527 | struct ocfs2_xattr_search xis = { |
| 3528 | .not_found = -ENODATA, |
| 3529 | }; |
| 3530 | |
| 3531 | struct ocfs2_xattr_search xbs = { |
| 3532 | .not_found = -ENODATA, |
| 3533 | }; |
| 3534 | |
Tiger Yang | 8154da3 | 2008-08-18 17:11:46 +0800 | [diff] [blame] | 3535 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
| 3536 | return -EOPNOTSUPP; |
| 3537 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 3538 | /* |
| 3539 | * Only xbs will be used on indexed trees. xis doesn't need a |
| 3540 | * bucket. |
| 3541 | */ |
| 3542 | xbs.bucket = ocfs2_xattr_bucket_new(inode); |
| 3543 | if (!xbs.bucket) { |
| 3544 | mlog_errno(-ENOMEM); |
| 3545 | return -ENOMEM; |
| 3546 | } |
| 3547 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 3548 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
| 3549 | if (ret < 0) { |
| 3550 | mlog_errno(ret); |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 3551 | goto cleanup_nolock; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 3552 | } |
| 3553 | xis.inode_bh = xbs.inode_bh = di_bh; |
| 3554 | di = (struct ocfs2_dinode *)di_bh->b_data; |
| 3555 | |
| 3556 | down_write(&OCFS2_I(inode)->ip_xattr_sem); |
| 3557 | /* |
| 3558 | * Scan inode and external block to find the same name |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 3559 | * extended attribute and collect search information. |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 3560 | */ |
| 3561 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); |
| 3562 | if (ret) |
| 3563 | goto cleanup; |
| 3564 | if (xis.not_found) { |
| 3565 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); |
| 3566 | if (ret) |
| 3567 | goto cleanup; |
| 3568 | } |
| 3569 | |
| 3570 | if (xis.not_found && xbs.not_found) { |
| 3571 | ret = -ENODATA; |
| 3572 | if (flags & XATTR_REPLACE) |
| 3573 | goto cleanup; |
| 3574 | ret = 0; |
| 3575 | if (!value) |
| 3576 | goto cleanup; |
| 3577 | } else { |
| 3578 | ret = -EEXIST; |
| 3579 | if (flags & XATTR_CREATE) |
| 3580 | goto cleanup; |
| 3581 | } |
| 3582 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 3583 | /* Check whether the value is refcounted and do some preparation. */ |
Tao Ma | 492a8a3 | 2009-08-18 11:43:17 +0800 | [diff] [blame] | 3584 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL && |
| 3585 | (!xis.not_found || !xbs.not_found)) { |
| 3586 | ret = ocfs2_prepare_refcount_xattr(inode, di, &xi, |
| 3587 | &xis, &xbs, &ref_tree, |
| 3588 | &ref_meta, &ref_credits); |
| 3589 | if (ret) { |
| 3590 | mlog_errno(ret); |
| 3591 | goto cleanup; |
| 3592 | } |
| 3593 | } |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3594 | |
| 3595 | mutex_lock(&tl_inode->i_mutex); |
| 3596 | |
| 3597 | if (ocfs2_truncate_log_needs_flush(osb)) { |
| 3598 | ret = __ocfs2_flush_truncate_log(osb); |
| 3599 | if (ret < 0) { |
| 3600 | mutex_unlock(&tl_inode->i_mutex); |
| 3601 | mlog_errno(ret); |
| 3602 | goto cleanup; |
| 3603 | } |
| 3604 | } |
| 3605 | mutex_unlock(&tl_inode->i_mutex); |
| 3606 | |
| 3607 | ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis, |
Tao Ma | 492a8a3 | 2009-08-18 11:43:17 +0800 | [diff] [blame] | 3608 | &xbs, &ctxt, ref_meta, &credits); |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3609 | if (ret) { |
| 3610 | mlog_errno(ret); |
| 3611 | goto cleanup; |
| 3612 | } |
| 3613 | |
Tao Ma | 4b3f620 | 2008-12-05 06:20:55 +0800 | [diff] [blame] | 3614 | /* we need to update inode's ctime field, so add credit for it. */ |
| 3615 | credits += OCFS2_INODE_UPDATE_CREDITS; |
Tao Ma | 492a8a3 | 2009-08-18 11:43:17 +0800 | [diff] [blame] | 3616 | ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits); |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3617 | if (IS_ERR(ctxt.handle)) { |
| 3618 | ret = PTR_ERR(ctxt.handle); |
| 3619 | mlog_errno(ret); |
| 3620 | goto cleanup; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 3621 | } |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 3622 | |
| 3623 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); |
| 3624 | |
| 3625 | ocfs2_commit_trans(osb, ctxt.handle); |
| 3626 | |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 3627 | if (ctxt.data_ac) |
| 3628 | ocfs2_free_alloc_context(ctxt.data_ac); |
| 3629 | if (ctxt.meta_ac) |
| 3630 | ocfs2_free_alloc_context(ctxt.meta_ac); |
| 3631 | if (ocfs2_dealloc_has_cluster(&ctxt.dealloc)) |
| 3632 | ocfs2_schedule_truncate_log_flush(osb, 1); |
| 3633 | ocfs2_run_deallocs(osb, &ctxt.dealloc); |
Tao Ma | 8b2c0db | 2009-08-18 11:43:49 +0800 | [diff] [blame] | 3634 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 3635 | cleanup: |
Tao Ma | 492a8a3 | 2009-08-18 11:43:17 +0800 | [diff] [blame] | 3636 | if (ref_tree) |
| 3637 | ocfs2_unlock_refcount_tree(osb, ref_tree, 1); |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 3638 | up_write(&OCFS2_I(inode)->ip_xattr_sem); |
Tao Ma | 8b2c0db | 2009-08-18 11:43:49 +0800 | [diff] [blame] | 3639 | if (!value && !ret) { |
| 3640 | ret = ocfs2_try_remove_refcount_tree(inode, di_bh); |
| 3641 | if (ret) |
| 3642 | mlog_errno(ret); |
| 3643 | } |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 3644 | ocfs2_inode_unlock(inode, 1); |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 3645 | cleanup_nolock: |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 3646 | brelse(di_bh); |
| 3647 | brelse(xbs.xattr_bh); |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 3648 | ocfs2_xattr_bucket_free(xbs.bucket); |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 3649 | |
| 3650 | return ret; |
| 3651 | } |
| 3652 | |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 3653 | /* |
| 3654 | * Find the xattr extent rec which may contains name_hash. |
| 3655 | * e_cpos will be the first name hash of the xattr rec. |
| 3656 | * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list. |
| 3657 | */ |
| 3658 | static int ocfs2_xattr_get_rec(struct inode *inode, |
| 3659 | u32 name_hash, |
| 3660 | u64 *p_blkno, |
| 3661 | u32 *e_cpos, |
| 3662 | u32 *num_clusters, |
| 3663 | struct ocfs2_extent_list *el) |
| 3664 | { |
| 3665 | int ret = 0, i; |
| 3666 | struct buffer_head *eb_bh = NULL; |
| 3667 | struct ocfs2_extent_block *eb; |
| 3668 | struct ocfs2_extent_rec *rec = NULL; |
| 3669 | u64 e_blkno = 0; |
| 3670 | |
| 3671 | if (el->l_tree_depth) { |
Joel Becker | facdb77 | 2009-02-12 18:08:48 -0800 | [diff] [blame] | 3672 | ret = ocfs2_find_leaf(INODE_CACHE(inode), el, name_hash, |
| 3673 | &eb_bh); |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 3674 | if (ret) { |
| 3675 | mlog_errno(ret); |
| 3676 | goto out; |
| 3677 | } |
| 3678 | |
| 3679 | eb = (struct ocfs2_extent_block *) eb_bh->b_data; |
| 3680 | el = &eb->h_list; |
| 3681 | |
| 3682 | if (el->l_tree_depth) { |
| 3683 | ocfs2_error(inode->i_sb, |
| 3684 | "Inode %lu has non zero tree depth in " |
| 3685 | "xattr tree block %llu\n", inode->i_ino, |
| 3686 | (unsigned long long)eb_bh->b_blocknr); |
| 3687 | ret = -EROFS; |
| 3688 | goto out; |
| 3689 | } |
| 3690 | } |
| 3691 | |
| 3692 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { |
| 3693 | rec = &el->l_recs[i]; |
| 3694 | |
| 3695 | if (le32_to_cpu(rec->e_cpos) <= name_hash) { |
| 3696 | e_blkno = le64_to_cpu(rec->e_blkno); |
| 3697 | break; |
| 3698 | } |
| 3699 | } |
| 3700 | |
| 3701 | if (!e_blkno) { |
| 3702 | ocfs2_error(inode->i_sb, "Inode %lu has bad extent " |
| 3703 | "record (%u, %u, 0) in xattr", inode->i_ino, |
| 3704 | le32_to_cpu(rec->e_cpos), |
| 3705 | ocfs2_rec_clusters(el, rec)); |
| 3706 | ret = -EROFS; |
| 3707 | goto out; |
| 3708 | } |
| 3709 | |
| 3710 | *p_blkno = le64_to_cpu(rec->e_blkno); |
| 3711 | *num_clusters = le16_to_cpu(rec->e_leaf_clusters); |
| 3712 | if (e_cpos) |
| 3713 | *e_cpos = le32_to_cpu(rec->e_cpos); |
| 3714 | out: |
| 3715 | brelse(eb_bh); |
| 3716 | return ret; |
| 3717 | } |
| 3718 | |
| 3719 | typedef int (xattr_bucket_func)(struct inode *inode, |
| 3720 | struct ocfs2_xattr_bucket *bucket, |
| 3721 | void *para); |
| 3722 | |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3723 | static int ocfs2_find_xe_in_bucket(struct inode *inode, |
Joel Becker | e2356a3 | 2008-10-27 15:01:54 -0700 | [diff] [blame] | 3724 | struct ocfs2_xattr_bucket *bucket, |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3725 | int name_index, |
| 3726 | const char *name, |
| 3727 | u32 name_hash, |
| 3728 | u16 *xe_index, |
| 3729 | int *found) |
| 3730 | { |
| 3731 | int i, ret = 0, cmp = 1, block_off, new_offset; |
Joel Becker | e2356a3 | 2008-10-27 15:01:54 -0700 | [diff] [blame] | 3732 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3733 | size_t name_len = strlen(name); |
| 3734 | struct ocfs2_xattr_entry *xe = NULL; |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3735 | char *xe_name; |
| 3736 | |
| 3737 | /* |
| 3738 | * We don't use binary search in the bucket because there |
| 3739 | * may be multiple entries with the same name hash. |
| 3740 | */ |
| 3741 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { |
| 3742 | xe = &xh->xh_entries[i]; |
| 3743 | |
| 3744 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) |
| 3745 | continue; |
| 3746 | else if (name_hash < le32_to_cpu(xe->xe_name_hash)) |
| 3747 | break; |
| 3748 | |
| 3749 | cmp = name_index - ocfs2_xattr_get_type(xe); |
| 3750 | if (!cmp) |
| 3751 | cmp = name_len - xe->xe_name_len; |
| 3752 | if (cmp) |
| 3753 | continue; |
| 3754 | |
Tao Ma | fd68a89 | 2009-08-18 11:43:21 +0800 | [diff] [blame] | 3755 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3756 | xh, |
| 3757 | i, |
| 3758 | &block_off, |
| 3759 | &new_offset); |
| 3760 | if (ret) { |
| 3761 | mlog_errno(ret); |
| 3762 | break; |
| 3763 | } |
| 3764 | |
Joel Becker | 970e493 | 2008-11-13 14:49:19 -0800 | [diff] [blame] | 3765 | |
Joel Becker | e2356a3 | 2008-10-27 15:01:54 -0700 | [diff] [blame] | 3766 | xe_name = bucket_block(bucket, block_off) + new_offset; |
| 3767 | if (!memcmp(name, xe_name, name_len)) { |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3768 | *xe_index = i; |
| 3769 | *found = 1; |
| 3770 | ret = 0; |
| 3771 | break; |
| 3772 | } |
| 3773 | } |
| 3774 | |
| 3775 | return ret; |
| 3776 | } |
| 3777 | |
| 3778 | /* |
| 3779 | * Find the specified xattr entry in a series of buckets. |
| 3780 | * This series start from p_blkno and last for num_clusters. |
| 3781 | * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains |
| 3782 | * the num of the valid buckets. |
| 3783 | * |
| 3784 | * Return the buffer_head this xattr should reside in. And if the xattr's |
| 3785 | * hash is in the gap of 2 buckets, return the lower bucket. |
| 3786 | */ |
| 3787 | static int ocfs2_xattr_bucket_find(struct inode *inode, |
| 3788 | int name_index, |
| 3789 | const char *name, |
| 3790 | u32 name_hash, |
| 3791 | u64 p_blkno, |
| 3792 | u32 first_hash, |
| 3793 | u32 num_clusters, |
| 3794 | struct ocfs2_xattr_search *xs) |
| 3795 | { |
| 3796 | int ret, found = 0; |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3797 | struct ocfs2_xattr_header *xh = NULL; |
| 3798 | struct ocfs2_xattr_entry *xe = NULL; |
| 3799 | u16 index = 0; |
| 3800 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
| 3801 | int low_bucket = 0, bucket, high_bucket; |
Joel Becker | e2356a3 | 2008-10-27 15:01:54 -0700 | [diff] [blame] | 3802 | struct ocfs2_xattr_bucket *search; |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3803 | u32 last_hash; |
Joel Becker | e2356a3 | 2008-10-27 15:01:54 -0700 | [diff] [blame] | 3804 | u64 blkno, lower_blkno = 0; |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3805 | |
Joel Becker | e2356a3 | 2008-10-27 15:01:54 -0700 | [diff] [blame] | 3806 | search = ocfs2_xattr_bucket_new(inode); |
| 3807 | if (!search) { |
| 3808 | ret = -ENOMEM; |
| 3809 | mlog_errno(ret); |
| 3810 | goto out; |
| 3811 | } |
| 3812 | |
| 3813 | ret = ocfs2_read_xattr_bucket(search, p_blkno); |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3814 | if (ret) { |
| 3815 | mlog_errno(ret); |
| 3816 | goto out; |
| 3817 | } |
| 3818 | |
Joel Becker | e2356a3 | 2008-10-27 15:01:54 -0700 | [diff] [blame] | 3819 | xh = bucket_xh(search); |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3820 | high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1; |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3821 | while (low_bucket <= high_bucket) { |
Joel Becker | e2356a3 | 2008-10-27 15:01:54 -0700 | [diff] [blame] | 3822 | ocfs2_xattr_bucket_relse(search); |
| 3823 | |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3824 | bucket = (low_bucket + high_bucket) / 2; |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3825 | blkno = p_blkno + bucket * blk_per_bucket; |
Joel Becker | e2356a3 | 2008-10-27 15:01:54 -0700 | [diff] [blame] | 3826 | ret = ocfs2_read_xattr_bucket(search, blkno); |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3827 | if (ret) { |
| 3828 | mlog_errno(ret); |
| 3829 | goto out; |
| 3830 | } |
| 3831 | |
Joel Becker | e2356a3 | 2008-10-27 15:01:54 -0700 | [diff] [blame] | 3832 | xh = bucket_xh(search); |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3833 | xe = &xh->xh_entries[0]; |
| 3834 | if (name_hash < le32_to_cpu(xe->xe_name_hash)) { |
| 3835 | high_bucket = bucket - 1; |
| 3836 | continue; |
| 3837 | } |
| 3838 | |
| 3839 | /* |
| 3840 | * Check whether the hash of the last entry in our |
Tao Ma | 5a09561 | 2008-09-19 22:17:41 +0800 | [diff] [blame] | 3841 | * bucket is larger than the search one. for an empty |
| 3842 | * bucket, the last one is also the first one. |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3843 | */ |
Tao Ma | 5a09561 | 2008-09-19 22:17:41 +0800 | [diff] [blame] | 3844 | if (xh->xh_count) |
| 3845 | xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1]; |
| 3846 | |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3847 | last_hash = le32_to_cpu(xe->xe_name_hash); |
| 3848 | |
Joel Becker | e2356a3 | 2008-10-27 15:01:54 -0700 | [diff] [blame] | 3849 | /* record lower_blkno which may be the insert place. */ |
| 3850 | lower_blkno = blkno; |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3851 | |
| 3852 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) { |
| 3853 | low_bucket = bucket + 1; |
| 3854 | continue; |
| 3855 | } |
| 3856 | |
| 3857 | /* the searched xattr should reside in this bucket if exists. */ |
Joel Becker | e2356a3 | 2008-10-27 15:01:54 -0700 | [diff] [blame] | 3858 | ret = ocfs2_find_xe_in_bucket(inode, search, |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3859 | name_index, name, name_hash, |
| 3860 | &index, &found); |
| 3861 | if (ret) { |
| 3862 | mlog_errno(ret); |
| 3863 | goto out; |
| 3864 | } |
| 3865 | break; |
| 3866 | } |
| 3867 | |
| 3868 | /* |
| 3869 | * Record the bucket we have found. |
| 3870 | * When the xattr's hash value is in the gap of 2 buckets, we will |
| 3871 | * always set it to the previous bucket. |
| 3872 | */ |
Joel Becker | e2356a3 | 2008-10-27 15:01:54 -0700 | [diff] [blame] | 3873 | if (!lower_blkno) |
| 3874 | lower_blkno = p_blkno; |
| 3875 | |
| 3876 | /* This should be in cache - we just read it during the search */ |
| 3877 | ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno); |
| 3878 | if (ret) { |
| 3879 | mlog_errno(ret); |
| 3880 | goto out; |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3881 | } |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3882 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 3883 | xs->header = bucket_xh(xs->bucket); |
| 3884 | xs->base = bucket_block(xs->bucket, 0); |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3885 | xs->end = xs->base + inode->i_sb->s_blocksize; |
| 3886 | |
| 3887 | if (found) { |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3888 | xs->here = &xs->header->xh_entries[index]; |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 3889 | trace_ocfs2_xattr_bucket_find(OCFS2_I(inode)->ip_blkno, |
| 3890 | name, name_index, name_hash, |
| 3891 | (unsigned long long)bucket_blkno(xs->bucket), |
| 3892 | index); |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3893 | } else |
| 3894 | ret = -ENODATA; |
| 3895 | |
| 3896 | out: |
Joel Becker | e2356a3 | 2008-10-27 15:01:54 -0700 | [diff] [blame] | 3897 | ocfs2_xattr_bucket_free(search); |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3898 | return ret; |
| 3899 | } |
| 3900 | |
| 3901 | static int ocfs2_xattr_index_block_find(struct inode *inode, |
| 3902 | struct buffer_head *root_bh, |
| 3903 | int name_index, |
| 3904 | const char *name, |
| 3905 | struct ocfs2_xattr_search *xs) |
| 3906 | { |
| 3907 | int ret; |
| 3908 | struct ocfs2_xattr_block *xb = |
| 3909 | (struct ocfs2_xattr_block *)root_bh->b_data; |
| 3910 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; |
| 3911 | struct ocfs2_extent_list *el = &xb_root->xt_list; |
| 3912 | u64 p_blkno = 0; |
| 3913 | u32 first_hash, num_clusters = 0; |
Tao Ma | 2057e5c | 2008-10-09 23:06:13 +0800 | [diff] [blame] | 3914 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3915 | |
| 3916 | if (le16_to_cpu(el->l_next_free_rec) == 0) |
| 3917 | return -ENODATA; |
| 3918 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 3919 | trace_ocfs2_xattr_index_block_find(OCFS2_I(inode)->ip_blkno, |
| 3920 | name, name_index, name_hash, |
| 3921 | (unsigned long long)root_bh->b_blocknr, |
| 3922 | -1); |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3923 | |
| 3924 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash, |
| 3925 | &num_clusters, el); |
| 3926 | if (ret) { |
| 3927 | mlog_errno(ret); |
| 3928 | goto out; |
| 3929 | } |
| 3930 | |
| 3931 | BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash); |
| 3932 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 3933 | trace_ocfs2_xattr_index_block_find_rec(OCFS2_I(inode)->ip_blkno, |
| 3934 | name, name_index, first_hash, |
| 3935 | (unsigned long long)p_blkno, |
| 3936 | num_clusters); |
Tao Ma | 589dc26 | 2008-08-18 17:38:51 +0800 | [diff] [blame] | 3937 | |
| 3938 | ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash, |
| 3939 | p_blkno, first_hash, num_clusters, xs); |
| 3940 | |
| 3941 | out: |
| 3942 | return ret; |
| 3943 | } |
| 3944 | |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 3945 | static int ocfs2_iterate_xattr_buckets(struct inode *inode, |
| 3946 | u64 blkno, |
| 3947 | u32 clusters, |
| 3948 | xattr_bucket_func *func, |
| 3949 | void *para) |
| 3950 | { |
Joel Becker | 6dde41d | 2008-10-24 17:16:48 -0700 | [diff] [blame] | 3951 | int i, ret = 0; |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 3952 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); |
| 3953 | u32 num_buckets = clusters * bpc; |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 3954 | struct ocfs2_xattr_bucket *bucket; |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 3955 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 3956 | bucket = ocfs2_xattr_bucket_new(inode); |
| 3957 | if (!bucket) { |
| 3958 | mlog_errno(-ENOMEM); |
| 3959 | return -ENOMEM; |
| 3960 | } |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 3961 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 3962 | trace_ocfs2_iterate_xattr_buckets( |
| 3963 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 3964 | (unsigned long long)blkno, clusters); |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 3965 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 3966 | for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) { |
| 3967 | ret = ocfs2_read_xattr_bucket(bucket, blkno); |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 3968 | if (ret) { |
| 3969 | mlog_errno(ret); |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 3970 | break; |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 3971 | } |
| 3972 | |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 3973 | /* |
| 3974 | * The real bucket num in this series of blocks is stored |
| 3975 | * in the 1st bucket. |
| 3976 | */ |
| 3977 | if (i == 0) |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 3978 | num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets); |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 3979 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 3980 | trace_ocfs2_iterate_xattr_bucket((unsigned long long)blkno, |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 3981 | le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash)); |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 3982 | if (func) { |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 3983 | ret = func(inode, bucket, para); |
Tao Ma | a46fa68 | 2009-05-04 05:18:09 +0800 | [diff] [blame] | 3984 | if (ret && ret != -ERANGE) |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 3985 | mlog_errno(ret); |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 3986 | /* Fall through to bucket_relse() */ |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 3987 | } |
| 3988 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 3989 | ocfs2_xattr_bucket_relse(bucket); |
| 3990 | if (ret) |
| 3991 | break; |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 3992 | } |
| 3993 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 3994 | ocfs2_xattr_bucket_free(bucket); |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 3995 | return ret; |
| 3996 | } |
| 3997 | |
| 3998 | struct ocfs2_xattr_tree_list { |
| 3999 | char *buffer; |
| 4000 | size_t buffer_size; |
Tao Ma | 936b883 | 2008-10-09 23:06:14 +0800 | [diff] [blame] | 4001 | size_t result; |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 4002 | }; |
| 4003 | |
Tao Ma | fd68a89 | 2009-08-18 11:43:21 +0800 | [diff] [blame] | 4004 | static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb, |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 4005 | struct ocfs2_xattr_header *xh, |
| 4006 | int index, |
| 4007 | int *block_off, |
| 4008 | int *new_offset) |
| 4009 | { |
| 4010 | u16 name_offset; |
| 4011 | |
| 4012 | if (index < 0 || index >= le16_to_cpu(xh->xh_count)) |
| 4013 | return -EINVAL; |
| 4014 | |
| 4015 | name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset); |
| 4016 | |
Tao Ma | fd68a89 | 2009-08-18 11:43:21 +0800 | [diff] [blame] | 4017 | *block_off = name_offset >> sb->s_blocksize_bits; |
| 4018 | *new_offset = name_offset % sb->s_blocksize; |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 4019 | |
| 4020 | return 0; |
| 4021 | } |
| 4022 | |
| 4023 | static int ocfs2_list_xattr_bucket(struct inode *inode, |
| 4024 | struct ocfs2_xattr_bucket *bucket, |
| 4025 | void *para) |
| 4026 | { |
Tao Ma | 936b883 | 2008-10-09 23:06:14 +0800 | [diff] [blame] | 4027 | int ret = 0, type; |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 4028 | struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para; |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 4029 | int i, block_off, new_offset; |
Tao Ma | 936b883 | 2008-10-09 23:06:14 +0800 | [diff] [blame] | 4030 | const char *prefix, *name; |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 4031 | |
Joel Becker | 3e63294 | 2008-10-24 17:04:49 -0700 | [diff] [blame] | 4032 | for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) { |
| 4033 | struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i]; |
Tao Ma | 936b883 | 2008-10-09 23:06:14 +0800 | [diff] [blame] | 4034 | type = ocfs2_xattr_get_type(entry); |
| 4035 | prefix = ocfs2_xattr_prefix(type); |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 4036 | |
Tao Ma | 936b883 | 2008-10-09 23:06:14 +0800 | [diff] [blame] | 4037 | if (prefix) { |
Tao Ma | fd68a89 | 2009-08-18 11:43:21 +0800 | [diff] [blame] | 4038 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
Joel Becker | 3e63294 | 2008-10-24 17:04:49 -0700 | [diff] [blame] | 4039 | bucket_xh(bucket), |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 4040 | i, |
| 4041 | &block_off, |
| 4042 | &new_offset); |
| 4043 | if (ret) |
| 4044 | break; |
Tao Ma | 936b883 | 2008-10-09 23:06:14 +0800 | [diff] [blame] | 4045 | |
Joel Becker | 51def39 | 2008-10-24 16:57:21 -0700 | [diff] [blame] | 4046 | name = (const char *)bucket_block(bucket, block_off) + |
Tao Ma | 936b883 | 2008-10-09 23:06:14 +0800 | [diff] [blame] | 4047 | new_offset; |
| 4048 | ret = ocfs2_xattr_list_entry(xl->buffer, |
| 4049 | xl->buffer_size, |
| 4050 | &xl->result, |
| 4051 | prefix, name, |
| 4052 | entry->xe_name_len); |
| 4053 | if (ret) |
| 4054 | break; |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 4055 | } |
| 4056 | } |
| 4057 | |
| 4058 | return ret; |
| 4059 | } |
| 4060 | |
Tao Ma | 47bca49 | 2009-08-18 11:43:42 +0800 | [diff] [blame] | 4061 | static int ocfs2_iterate_xattr_index_block(struct inode *inode, |
| 4062 | struct buffer_head *blk_bh, |
| 4063 | xattr_tree_rec_func *rec_func, |
| 4064 | void *para) |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 4065 | { |
Tao Ma | 47bca49 | 2009-08-18 11:43:42 +0800 | [diff] [blame] | 4066 | struct ocfs2_xattr_block *xb = |
| 4067 | (struct ocfs2_xattr_block *)blk_bh->b_data; |
| 4068 | struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list; |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 4069 | int ret = 0; |
| 4070 | u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0; |
| 4071 | u64 p_blkno = 0; |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 4072 | |
Tao Ma | 47bca49 | 2009-08-18 11:43:42 +0800 | [diff] [blame] | 4073 | if (!el->l_next_free_rec || !rec_func) |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 4074 | return 0; |
| 4075 | |
| 4076 | while (name_hash > 0) { |
| 4077 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, |
| 4078 | &e_cpos, &num_clusters, el); |
| 4079 | if (ret) { |
| 4080 | mlog_errno(ret); |
Tao Ma | 47bca49 | 2009-08-18 11:43:42 +0800 | [diff] [blame] | 4081 | break; |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 4082 | } |
| 4083 | |
Tao Ma | 47bca49 | 2009-08-18 11:43:42 +0800 | [diff] [blame] | 4084 | ret = rec_func(inode, blk_bh, p_blkno, e_cpos, |
| 4085 | num_clusters, para); |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 4086 | if (ret) { |
Tao Ma | a46fa68 | 2009-05-04 05:18:09 +0800 | [diff] [blame] | 4087 | if (ret != -ERANGE) |
| 4088 | mlog_errno(ret); |
Tao Ma | 47bca49 | 2009-08-18 11:43:42 +0800 | [diff] [blame] | 4089 | break; |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 4090 | } |
| 4091 | |
| 4092 | if (e_cpos == 0) |
| 4093 | break; |
| 4094 | |
| 4095 | name_hash = e_cpos - 1; |
| 4096 | } |
| 4097 | |
Tao Ma | 47bca49 | 2009-08-18 11:43:42 +0800 | [diff] [blame] | 4098 | return ret; |
| 4099 | |
| 4100 | } |
| 4101 | |
| 4102 | static int ocfs2_list_xattr_tree_rec(struct inode *inode, |
| 4103 | struct buffer_head *root_bh, |
| 4104 | u64 blkno, u32 cpos, u32 len, void *para) |
| 4105 | { |
| 4106 | return ocfs2_iterate_xattr_buckets(inode, blkno, len, |
| 4107 | ocfs2_list_xattr_bucket, para); |
| 4108 | } |
| 4109 | |
| 4110 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, |
| 4111 | struct buffer_head *blk_bh, |
| 4112 | char *buffer, |
| 4113 | size_t buffer_size) |
| 4114 | { |
| 4115 | int ret; |
| 4116 | struct ocfs2_xattr_tree_list xl = { |
| 4117 | .buffer = buffer, |
| 4118 | .buffer_size = buffer_size, |
| 4119 | .result = 0, |
| 4120 | }; |
| 4121 | |
| 4122 | ret = ocfs2_iterate_xattr_index_block(inode, blk_bh, |
| 4123 | ocfs2_list_xattr_tree_rec, &xl); |
| 4124 | if (ret) { |
| 4125 | mlog_errno(ret); |
| 4126 | goto out; |
| 4127 | } |
| 4128 | |
Tao Ma | 936b883 | 2008-10-09 23:06:14 +0800 | [diff] [blame] | 4129 | ret = xl.result; |
Tao Ma | 0c044f0 | 2008-08-18 17:38:50 +0800 | [diff] [blame] | 4130 | out: |
| 4131 | return ret; |
| 4132 | } |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4133 | |
| 4134 | static int cmp_xe(const void *a, const void *b) |
| 4135 | { |
| 4136 | const struct ocfs2_xattr_entry *l = a, *r = b; |
| 4137 | u32 l_hash = le32_to_cpu(l->xe_name_hash); |
| 4138 | u32 r_hash = le32_to_cpu(r->xe_name_hash); |
| 4139 | |
| 4140 | if (l_hash > r_hash) |
| 4141 | return 1; |
| 4142 | if (l_hash < r_hash) |
| 4143 | return -1; |
| 4144 | return 0; |
| 4145 | } |
| 4146 | |
| 4147 | static void swap_xe(void *a, void *b, int size) |
| 4148 | { |
| 4149 | struct ocfs2_xattr_entry *l = a, *r = b, tmp; |
| 4150 | |
| 4151 | tmp = *l; |
| 4152 | memcpy(l, r, sizeof(struct ocfs2_xattr_entry)); |
| 4153 | memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry)); |
| 4154 | } |
| 4155 | |
| 4156 | /* |
| 4157 | * When the ocfs2_xattr_block is filled up, new bucket will be created |
| 4158 | * and all the xattr entries will be moved to the new bucket. |
Joel Becker | 178eeac | 2008-10-27 15:18:29 -0700 | [diff] [blame] | 4159 | * The header goes at the start of the bucket, and the names+values are |
| 4160 | * filled from the end. This is why *target starts as the last buffer. |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4161 | * Note: we need to sort the entries since they are not saved in order |
| 4162 | * in the ocfs2_xattr_block. |
| 4163 | */ |
| 4164 | static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode, |
| 4165 | struct buffer_head *xb_bh, |
Joel Becker | 178eeac | 2008-10-27 15:18:29 -0700 | [diff] [blame] | 4166 | struct ocfs2_xattr_bucket *bucket) |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4167 | { |
| 4168 | int i, blocksize = inode->i_sb->s_blocksize; |
Joel Becker | 178eeac | 2008-10-27 15:18:29 -0700 | [diff] [blame] | 4169 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4170 | u16 offset, size, off_change; |
| 4171 | struct ocfs2_xattr_entry *xe; |
| 4172 | struct ocfs2_xattr_block *xb = |
| 4173 | (struct ocfs2_xattr_block *)xb_bh->b_data; |
| 4174 | struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header; |
Joel Becker | 178eeac | 2008-10-27 15:18:29 -0700 | [diff] [blame] | 4175 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4176 | u16 count = le16_to_cpu(xb_xh->xh_count); |
Joel Becker | 178eeac | 2008-10-27 15:18:29 -0700 | [diff] [blame] | 4177 | char *src = xb_bh->b_data; |
| 4178 | char *target = bucket_block(bucket, blks - 1); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4179 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 4180 | trace_ocfs2_cp_xattr_block_to_bucket_begin( |
| 4181 | (unsigned long long)xb_bh->b_blocknr, |
| 4182 | (unsigned long long)bucket_blkno(bucket)); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4183 | |
Joel Becker | 178eeac | 2008-10-27 15:18:29 -0700 | [diff] [blame] | 4184 | for (i = 0; i < blks; i++) |
| 4185 | memset(bucket_block(bucket, i), 0, blocksize); |
| 4186 | |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4187 | /* |
| 4188 | * Since the xe_name_offset is based on ocfs2_xattr_header, |
| 4189 | * there is a offset change corresponding to the change of |
| 4190 | * ocfs2_xattr_header's position. |
| 4191 | */ |
| 4192 | off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); |
| 4193 | xe = &xb_xh->xh_entries[count - 1]; |
| 4194 | offset = le16_to_cpu(xe->xe_name_offset) + off_change; |
| 4195 | size = blocksize - offset; |
| 4196 | |
| 4197 | /* copy all the names and values. */ |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4198 | memcpy(target + offset, src + offset, size); |
| 4199 | |
| 4200 | /* Init new header now. */ |
| 4201 | xh->xh_count = xb_xh->xh_count; |
| 4202 | xh->xh_num_buckets = cpu_to_le16(1); |
| 4203 | xh->xh_name_value_len = cpu_to_le16(size); |
| 4204 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size); |
| 4205 | |
| 4206 | /* copy all the entries. */ |
Joel Becker | 178eeac | 2008-10-27 15:18:29 -0700 | [diff] [blame] | 4207 | target = bucket_block(bucket, 0); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4208 | offset = offsetof(struct ocfs2_xattr_header, xh_entries); |
| 4209 | size = count * sizeof(struct ocfs2_xattr_entry); |
| 4210 | memcpy(target + offset, (char *)xb_xh + offset, size); |
| 4211 | |
| 4212 | /* Change the xe offset for all the xe because of the move. */ |
| 4213 | off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize + |
| 4214 | offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); |
| 4215 | for (i = 0; i < count; i++) |
| 4216 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change); |
| 4217 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 4218 | trace_ocfs2_cp_xattr_block_to_bucket_end(offset, size, off_change); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4219 | |
| 4220 | sort(target + offset, count, sizeof(struct ocfs2_xattr_entry), |
| 4221 | cmp_xe, swap_xe); |
| 4222 | } |
| 4223 | |
| 4224 | /* |
| 4225 | * After we move xattr from block to index btree, we have to |
| 4226 | * update ocfs2_xattr_search to the new xe and base. |
| 4227 | * |
| 4228 | * When the entry is in xattr block, xattr_bh indicates the storage place. |
| 4229 | * While if the entry is in index b-tree, "bucket" indicates the |
| 4230 | * real place of the xattr. |
| 4231 | */ |
Joel Becker | 178eeac | 2008-10-27 15:18:29 -0700 | [diff] [blame] | 4232 | static void ocfs2_xattr_update_xattr_search(struct inode *inode, |
| 4233 | struct ocfs2_xattr_search *xs, |
| 4234 | struct buffer_head *old_bh) |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4235 | { |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4236 | char *buf = old_bh->b_data; |
| 4237 | struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf; |
| 4238 | struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header; |
Joel Becker | 178eeac | 2008-10-27 15:18:29 -0700 | [diff] [blame] | 4239 | int i; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4240 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 4241 | xs->header = bucket_xh(xs->bucket); |
Joel Becker | 178eeac | 2008-10-27 15:18:29 -0700 | [diff] [blame] | 4242 | xs->base = bucket_block(xs->bucket, 0); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4243 | xs->end = xs->base + inode->i_sb->s_blocksize; |
| 4244 | |
Joel Becker | 178eeac | 2008-10-27 15:18:29 -0700 | [diff] [blame] | 4245 | if (xs->not_found) |
| 4246 | return; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4247 | |
Joel Becker | 178eeac | 2008-10-27 15:18:29 -0700 | [diff] [blame] | 4248 | i = xs->here - old_xh->xh_entries; |
| 4249 | xs->here = &xs->header->xh_entries[i]; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4250 | } |
| 4251 | |
| 4252 | static int ocfs2_xattr_create_index_block(struct inode *inode, |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 4253 | struct ocfs2_xattr_search *xs, |
| 4254 | struct ocfs2_xattr_set_ctxt *ctxt) |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4255 | { |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 4256 | int ret; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4257 | u32 bit_off, len; |
| 4258 | u64 blkno; |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 4259 | handle_t *handle = ctxt->handle; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4260 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4261 | struct buffer_head *xb_bh = xs->xattr_bh; |
| 4262 | struct ocfs2_xattr_block *xb = |
| 4263 | (struct ocfs2_xattr_block *)xb_bh->b_data; |
| 4264 | struct ocfs2_xattr_tree_root *xr; |
| 4265 | u16 xb_flags = le16_to_cpu(xb->xb_flags); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4266 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 4267 | trace_ocfs2_xattr_create_index_block_begin( |
| 4268 | (unsigned long long)xb_bh->b_blocknr); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4269 | |
| 4270 | BUG_ON(xb_flags & OCFS2_XATTR_INDEXED); |
Joel Becker | 178eeac | 2008-10-27 15:18:29 -0700 | [diff] [blame] | 4271 | BUG_ON(!xs->bucket); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4272 | |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4273 | /* |
| 4274 | * XXX: |
| 4275 | * We can use this lock for now, and maybe move to a dedicated mutex |
| 4276 | * if performance becomes a problem later. |
| 4277 | */ |
| 4278 | down_write(&oi->ip_alloc_sem); |
| 4279 | |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 4280 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), xb_bh, |
Joel Becker | 8400897 | 2008-12-09 16:11:49 -0800 | [diff] [blame] | 4281 | OCFS2_JOURNAL_ACCESS_WRITE); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4282 | if (ret) { |
| 4283 | mlog_errno(ret); |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 4284 | goto out; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4285 | } |
| 4286 | |
Joel Becker | 1ed9b77 | 2010-05-06 13:59:06 +0800 | [diff] [blame] | 4287 | ret = __ocfs2_claim_clusters(handle, ctxt->data_ac, |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 4288 | 1, 1, &bit_off, &len); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4289 | if (ret) { |
| 4290 | mlog_errno(ret); |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 4291 | goto out; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4292 | } |
| 4293 | |
| 4294 | /* |
| 4295 | * The bucket may spread in many blocks, and |
| 4296 | * we will only touch the 1st block and the last block |
| 4297 | * in the whole bucket(one for entry and one for data). |
| 4298 | */ |
| 4299 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off); |
| 4300 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 4301 | trace_ocfs2_xattr_create_index_block((unsigned long long)blkno); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4302 | |
Joel Becker | 178eeac | 2008-10-27 15:18:29 -0700 | [diff] [blame] | 4303 | ret = ocfs2_init_xattr_bucket(xs->bucket, blkno); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4304 | if (ret) { |
| 4305 | mlog_errno(ret); |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 4306 | goto out; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4307 | } |
| 4308 | |
Joel Becker | 178eeac | 2008-10-27 15:18:29 -0700 | [diff] [blame] | 4309 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
| 4310 | OCFS2_JOURNAL_ACCESS_CREATE); |
Joel Becker | bd60bd3 | 2008-10-20 18:25:56 -0700 | [diff] [blame] | 4311 | if (ret) { |
| 4312 | mlog_errno(ret); |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 4313 | goto out; |
Joel Becker | bd60bd3 | 2008-10-20 18:25:56 -0700 | [diff] [blame] | 4314 | } |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4315 | |
Joel Becker | 178eeac | 2008-10-27 15:18:29 -0700 | [diff] [blame] | 4316 | ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket); |
| 4317 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); |
| 4318 | |
| 4319 | ocfs2_xattr_update_xattr_search(inode, xs, xb_bh); |
| 4320 | |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4321 | /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */ |
| 4322 | memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize - |
| 4323 | offsetof(struct ocfs2_xattr_block, xb_attrs)); |
| 4324 | |
| 4325 | xr = &xb->xb_attrs.xb_root; |
| 4326 | xr->xt_clusters = cpu_to_le32(1); |
| 4327 | xr->xt_last_eb_blk = 0; |
| 4328 | xr->xt_list.l_tree_depth = 0; |
| 4329 | xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb)); |
| 4330 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); |
| 4331 | |
| 4332 | xr->xt_list.l_recs[0].e_cpos = 0; |
| 4333 | xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno); |
| 4334 | xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1); |
| 4335 | |
| 4336 | xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED); |
| 4337 | |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 4338 | ocfs2_journal_dirty(handle, xb_bh); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4339 | |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 4340 | out: |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4341 | up_write(&oi->ip_alloc_sem); |
| 4342 | |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4343 | return ret; |
| 4344 | } |
| 4345 | |
| 4346 | static int cmp_xe_offset(const void *a, const void *b) |
| 4347 | { |
| 4348 | const struct ocfs2_xattr_entry *l = a, *r = b; |
| 4349 | u32 l_name_offset = le16_to_cpu(l->xe_name_offset); |
| 4350 | u32 r_name_offset = le16_to_cpu(r->xe_name_offset); |
| 4351 | |
| 4352 | if (l_name_offset < r_name_offset) |
| 4353 | return 1; |
| 4354 | if (l_name_offset > r_name_offset) |
| 4355 | return -1; |
| 4356 | return 0; |
| 4357 | } |
| 4358 | |
| 4359 | /* |
| 4360 | * defrag a xattr bucket if we find that the bucket has some |
| 4361 | * holes beteen name/value pairs. |
| 4362 | * We will move all the name/value pairs to the end of the bucket |
| 4363 | * so that we can spare some space for insertion. |
| 4364 | */ |
| 4365 | static int ocfs2_defrag_xattr_bucket(struct inode *inode, |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 4366 | handle_t *handle, |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4367 | struct ocfs2_xattr_bucket *bucket) |
| 4368 | { |
| 4369 | int ret, i; |
Joel Becker | 199799a | 2009-08-14 19:04:15 -0700 | [diff] [blame] | 4370 | size_t end, offset, len; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4371 | struct ocfs2_xattr_header *xh; |
| 4372 | char *entries, *buf, *bucket_buf = NULL; |
Joel Becker | 9c7759a | 2008-10-24 16:21:03 -0700 | [diff] [blame] | 4373 | u64 blkno = bucket_blkno(bucket); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4374 | u16 xh_free_start; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4375 | size_t blocksize = inode->i_sb->s_blocksize; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4376 | struct ocfs2_xattr_entry *xe; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4377 | |
| 4378 | /* |
| 4379 | * In order to make the operation more efficient and generic, |
| 4380 | * we copy all the blocks into a contiguous memory and do the |
| 4381 | * defragment there, so if anything is error, we will not touch |
| 4382 | * the real block. |
| 4383 | */ |
| 4384 | bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS); |
| 4385 | if (!bucket_buf) { |
| 4386 | ret = -EIO; |
| 4387 | goto out; |
| 4388 | } |
| 4389 | |
Joel Becker | 161d6f3 | 2008-10-27 15:25:18 -0700 | [diff] [blame] | 4390 | buf = bucket_buf; |
Tao Ma | 1c32a2f | 2008-11-06 08:10:47 +0800 | [diff] [blame] | 4391 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
| 4392 | memcpy(buf, bucket_block(bucket, i), blocksize); |
Joel Becker | 161d6f3 | 2008-10-27 15:25:18 -0700 | [diff] [blame] | 4393 | |
Tao Ma | 1c32a2f | 2008-11-06 08:10:47 +0800 | [diff] [blame] | 4394 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, |
Joel Becker | 161d6f3 | 2008-10-27 15:25:18 -0700 | [diff] [blame] | 4395 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 4396 | if (ret < 0) { |
| 4397 | mlog_errno(ret); |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 4398 | goto out; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4399 | } |
| 4400 | |
| 4401 | xh = (struct ocfs2_xattr_header *)bucket_buf; |
| 4402 | entries = (char *)xh->xh_entries; |
| 4403 | xh_free_start = le16_to_cpu(xh->xh_free_start); |
| 4404 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 4405 | trace_ocfs2_defrag_xattr_bucket( |
Mark Fasheh | de29c08 | 2008-10-29 14:45:30 -0700 | [diff] [blame] | 4406 | (unsigned long long)blkno, le16_to_cpu(xh->xh_count), |
| 4407 | xh_free_start, le16_to_cpu(xh->xh_name_value_len)); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4408 | |
| 4409 | /* |
| 4410 | * sort all the entries by their offset. |
| 4411 | * the largest will be the first, so that we can |
| 4412 | * move them to the end one by one. |
| 4413 | */ |
| 4414 | sort(entries, le16_to_cpu(xh->xh_count), |
| 4415 | sizeof(struct ocfs2_xattr_entry), |
| 4416 | cmp_xe_offset, swap_xe); |
| 4417 | |
| 4418 | /* Move all name/values to the end of the bucket. */ |
| 4419 | xe = xh->xh_entries; |
| 4420 | end = OCFS2_XATTR_BUCKET_SIZE; |
| 4421 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) { |
| 4422 | offset = le16_to_cpu(xe->xe_name_offset); |
Joel Becker | 199799a | 2009-08-14 19:04:15 -0700 | [diff] [blame] | 4423 | len = namevalue_size_xe(xe); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4424 | |
| 4425 | /* |
| 4426 | * We must make sure that the name/value pair |
| 4427 | * exist in the same block. So adjust end to |
| 4428 | * the previous block end if needed. |
| 4429 | */ |
| 4430 | if (((end - len) / blocksize != |
| 4431 | (end - 1) / blocksize)) |
| 4432 | end = end - end % blocksize; |
| 4433 | |
| 4434 | if (end > offset + len) { |
| 4435 | memmove(bucket_buf + end - len, |
| 4436 | bucket_buf + offset, len); |
| 4437 | xe->xe_name_offset = cpu_to_le16(end - len); |
| 4438 | } |
| 4439 | |
| 4440 | mlog_bug_on_msg(end < offset + len, "Defrag check failed for " |
| 4441 | "bucket %llu\n", (unsigned long long)blkno); |
| 4442 | |
| 4443 | end -= len; |
| 4444 | } |
| 4445 | |
| 4446 | mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for " |
| 4447 | "bucket %llu\n", (unsigned long long)blkno); |
| 4448 | |
| 4449 | if (xh_free_start == end) |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 4450 | goto out; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4451 | |
| 4452 | memset(bucket_buf + xh_free_start, 0, end - xh_free_start); |
| 4453 | xh->xh_free_start = cpu_to_le16(end); |
| 4454 | |
| 4455 | /* sort the entries by their name_hash. */ |
| 4456 | sort(entries, le16_to_cpu(xh->xh_count), |
| 4457 | sizeof(struct ocfs2_xattr_entry), |
| 4458 | cmp_xe, swap_xe); |
| 4459 | |
| 4460 | buf = bucket_buf; |
Tao Ma | 1c32a2f | 2008-11-06 08:10:47 +0800 | [diff] [blame] | 4461 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
| 4462 | memcpy(bucket_block(bucket, i), buf, blocksize); |
| 4463 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4464 | |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4465 | out: |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4466 | kfree(bucket_buf); |
| 4467 | return ret; |
| 4468 | } |
| 4469 | |
| 4470 | /* |
Joel Becker | b5c03e7 | 2008-11-25 19:58:16 -0800 | [diff] [blame] | 4471 | * prev_blkno points to the start of an existing extent. new_blkno |
| 4472 | * points to a newly allocated extent. Because we know each of our |
| 4473 | * clusters contains more than bucket, we can easily split one cluster |
| 4474 | * at a bucket boundary. So we take the last cluster of the existing |
| 4475 | * extent and split it down the middle. We move the last half of the |
| 4476 | * buckets in the last cluster of the existing extent over to the new |
| 4477 | * extent. |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4478 | * |
Joel Becker | b5c03e7 | 2008-11-25 19:58:16 -0800 | [diff] [blame] | 4479 | * first_bh is the buffer at prev_blkno so we can update the existing |
| 4480 | * extent's bucket count. header_bh is the bucket were we were hoping |
| 4481 | * to insert our xattr. If the bucket move places the target in the new |
| 4482 | * extent, we'll update first_bh and header_bh after modifying the old |
| 4483 | * extent. |
| 4484 | * |
| 4485 | * first_hash will be set as the 1st xe's name_hash in the new extent. |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4486 | */ |
| 4487 | static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode, |
| 4488 | handle_t *handle, |
Joel Becker | 41cb814 | 2008-11-26 14:25:21 -0800 | [diff] [blame] | 4489 | struct ocfs2_xattr_bucket *first, |
| 4490 | struct ocfs2_xattr_bucket *target, |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4491 | u64 new_blkno, |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4492 | u32 num_clusters, |
| 4493 | u32 *first_hash) |
| 4494 | { |
Joel Becker | c58b603 | 2008-11-26 13:36:24 -0800 | [diff] [blame] | 4495 | int ret; |
Joel Becker | 41cb814 | 2008-11-26 14:25:21 -0800 | [diff] [blame] | 4496 | struct super_block *sb = inode->i_sb; |
| 4497 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(sb); |
| 4498 | int num_buckets = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb)); |
Joel Becker | b5c03e7 | 2008-11-25 19:58:16 -0800 | [diff] [blame] | 4499 | int to_move = num_buckets / 2; |
Joel Becker | c58b603 | 2008-11-26 13:36:24 -0800 | [diff] [blame] | 4500 | u64 src_blkno; |
Joel Becker | 41cb814 | 2008-11-26 14:25:21 -0800 | [diff] [blame] | 4501 | u64 last_cluster_blkno = bucket_blkno(first) + |
| 4502 | ((num_clusters - 1) * ocfs2_clusters_to_blocks(sb, 1)); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4503 | |
Joel Becker | 41cb814 | 2008-11-26 14:25:21 -0800 | [diff] [blame] | 4504 | BUG_ON(le16_to_cpu(bucket_xh(first)->xh_num_buckets) < num_buckets); |
| 4505 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE == OCFS2_SB(sb)->s_clustersize); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4506 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 4507 | trace_ocfs2_mv_xattr_bucket_cross_cluster( |
| 4508 | (unsigned long long)last_cluster_blkno, |
| 4509 | (unsigned long long)new_blkno); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4510 | |
Joel Becker | 41cb814 | 2008-11-26 14:25:21 -0800 | [diff] [blame] | 4511 | ret = ocfs2_mv_xattr_buckets(inode, handle, bucket_blkno(first), |
Joel Becker | c58b603 | 2008-11-26 13:36:24 -0800 | [diff] [blame] | 4512 | last_cluster_blkno, new_blkno, |
| 4513 | to_move, first_hash); |
Joel Becker | b5c03e7 | 2008-11-25 19:58:16 -0800 | [diff] [blame] | 4514 | if (ret) { |
| 4515 | mlog_errno(ret); |
| 4516 | goto out; |
| 4517 | } |
| 4518 | |
Joel Becker | c58b603 | 2008-11-26 13:36:24 -0800 | [diff] [blame] | 4519 | /* This is the first bucket that got moved */ |
| 4520 | src_blkno = last_cluster_blkno + (to_move * blks_per_bucket); |
| 4521 | |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4522 | /* |
Joel Becker | c58b603 | 2008-11-26 13:36:24 -0800 | [diff] [blame] | 4523 | * If the target bucket was part of the moved buckets, we need to |
Joel Becker | 41cb814 | 2008-11-26 14:25:21 -0800 | [diff] [blame] | 4524 | * update first and target. |
Joel Becker | b5c03e7 | 2008-11-25 19:58:16 -0800 | [diff] [blame] | 4525 | */ |
Joel Becker | 41cb814 | 2008-11-26 14:25:21 -0800 | [diff] [blame] | 4526 | if (bucket_blkno(target) >= src_blkno) { |
Joel Becker | b5c03e7 | 2008-11-25 19:58:16 -0800 | [diff] [blame] | 4527 | /* Find the block for the new target bucket */ |
| 4528 | src_blkno = new_blkno + |
Joel Becker | 41cb814 | 2008-11-26 14:25:21 -0800 | [diff] [blame] | 4529 | (bucket_blkno(target) - src_blkno); |
| 4530 | |
| 4531 | ocfs2_xattr_bucket_relse(first); |
| 4532 | ocfs2_xattr_bucket_relse(target); |
Joel Becker | b5c03e7 | 2008-11-25 19:58:16 -0800 | [diff] [blame] | 4533 | |
| 4534 | /* |
Joel Becker | c58b603 | 2008-11-26 13:36:24 -0800 | [diff] [blame] | 4535 | * These shouldn't fail - the buffers are in the |
Joel Becker | b5c03e7 | 2008-11-25 19:58:16 -0800 | [diff] [blame] | 4536 | * journal from ocfs2_cp_xattr_bucket(). |
| 4537 | */ |
Joel Becker | 41cb814 | 2008-11-26 14:25:21 -0800 | [diff] [blame] | 4538 | ret = ocfs2_read_xattr_bucket(first, new_blkno); |
Joel Becker | c58b603 | 2008-11-26 13:36:24 -0800 | [diff] [blame] | 4539 | if (ret) { |
| 4540 | mlog_errno(ret); |
| 4541 | goto out; |
| 4542 | } |
Joel Becker | 41cb814 | 2008-11-26 14:25:21 -0800 | [diff] [blame] | 4543 | ret = ocfs2_read_xattr_bucket(target, src_blkno); |
| 4544 | if (ret) |
Joel Becker | b5c03e7 | 2008-11-25 19:58:16 -0800 | [diff] [blame] | 4545 | mlog_errno(ret); |
Joel Becker | b5c03e7 | 2008-11-25 19:58:16 -0800 | [diff] [blame] | 4546 | |
Joel Becker | b5c03e7 | 2008-11-25 19:58:16 -0800 | [diff] [blame] | 4547 | } |
| 4548 | |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4549 | out: |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4550 | return ret; |
| 4551 | } |
| 4552 | |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4553 | /* |
Tao Ma | 80bcaf3 | 2008-10-27 06:06:24 +0800 | [diff] [blame] | 4554 | * Find the suitable pos when we divide a bucket into 2. |
| 4555 | * We have to make sure the xattrs with the same hash value exist |
| 4556 | * in the same bucket. |
| 4557 | * |
| 4558 | * If this ocfs2_xattr_header covers more than one hash value, find a |
| 4559 | * place where the hash value changes. Try to find the most even split. |
| 4560 | * The most common case is that all entries have different hash values, |
| 4561 | * and the first check we make will find a place to split. |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4562 | */ |
Tao Ma | 80bcaf3 | 2008-10-27 06:06:24 +0800 | [diff] [blame] | 4563 | static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh) |
| 4564 | { |
| 4565 | struct ocfs2_xattr_entry *entries = xh->xh_entries; |
| 4566 | int count = le16_to_cpu(xh->xh_count); |
| 4567 | int delta, middle = count / 2; |
| 4568 | |
| 4569 | /* |
| 4570 | * We start at the middle. Each step gets farther away in both |
| 4571 | * directions. We therefore hit the change in hash value |
| 4572 | * nearest to the middle. Note that this loop does not execute for |
| 4573 | * count < 2. |
| 4574 | */ |
| 4575 | for (delta = 0; delta < middle; delta++) { |
| 4576 | /* Let's check delta earlier than middle */ |
| 4577 | if (cmp_xe(&entries[middle - delta - 1], |
| 4578 | &entries[middle - delta])) |
| 4579 | return middle - delta; |
| 4580 | |
| 4581 | /* For even counts, don't walk off the end */ |
| 4582 | if ((middle + delta + 1) == count) |
| 4583 | continue; |
| 4584 | |
| 4585 | /* Now try delta past middle */ |
| 4586 | if (cmp_xe(&entries[middle + delta], |
| 4587 | &entries[middle + delta + 1])) |
| 4588 | return middle + delta + 1; |
| 4589 | } |
| 4590 | |
| 4591 | /* Every entry had the same hash */ |
| 4592 | return count; |
| 4593 | } |
| 4594 | |
| 4595 | /* |
| 4596 | * Move some xattrs in old bucket(blk) to new bucket(new_blk). |
| 4597 | * first_hash will record the 1st hash of the new bucket. |
| 4598 | * |
| 4599 | * Normally half of the xattrs will be moved. But we have to make |
| 4600 | * sure that the xattrs with the same hash value are stored in the |
| 4601 | * same bucket. If all the xattrs in this bucket have the same hash |
| 4602 | * value, the new bucket will be initialized as an empty one and the |
| 4603 | * first_hash will be initialized as (hash_value+1). |
| 4604 | */ |
| 4605 | static int ocfs2_divide_xattr_bucket(struct inode *inode, |
| 4606 | handle_t *handle, |
| 4607 | u64 blk, |
| 4608 | u64 new_blk, |
| 4609 | u32 *first_hash, |
| 4610 | int new_bucket_head) |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4611 | { |
| 4612 | int ret, i; |
Joel Becker | 199799a | 2009-08-14 19:04:15 -0700 | [diff] [blame] | 4613 | int count, start, len, name_value_len = 0, name_offset = 0; |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 4614 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4615 | struct ocfs2_xattr_header *xh; |
| 4616 | struct ocfs2_xattr_entry *xe; |
| 4617 | int blocksize = inode->i_sb->s_blocksize; |
| 4618 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 4619 | trace_ocfs2_divide_xattr_bucket_begin((unsigned long long)blk, |
| 4620 | (unsigned long long)new_blk); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4621 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 4622 | s_bucket = ocfs2_xattr_bucket_new(inode); |
| 4623 | t_bucket = ocfs2_xattr_bucket_new(inode); |
| 4624 | if (!s_bucket || !t_bucket) { |
| 4625 | ret = -ENOMEM; |
| 4626 | mlog_errno(ret); |
| 4627 | goto out; |
| 4628 | } |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4629 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 4630 | ret = ocfs2_read_xattr_bucket(s_bucket, blk); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4631 | if (ret) { |
| 4632 | mlog_errno(ret); |
| 4633 | goto out; |
| 4634 | } |
| 4635 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 4636 | ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket, |
Joel Becker | 1224be0 | 2008-10-24 18:47:33 -0700 | [diff] [blame] | 4637 | OCFS2_JOURNAL_ACCESS_WRITE); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4638 | if (ret) { |
| 4639 | mlog_errno(ret); |
| 4640 | goto out; |
| 4641 | } |
| 4642 | |
Joel Becker | 784b816 | 2008-10-24 17:33:40 -0700 | [diff] [blame] | 4643 | /* |
| 4644 | * Even if !new_bucket_head, we're overwriting t_bucket. Thus, |
| 4645 | * there's no need to read it. |
| 4646 | */ |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 4647 | ret = ocfs2_init_xattr_bucket(t_bucket, new_blk); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4648 | if (ret) { |
| 4649 | mlog_errno(ret); |
| 4650 | goto out; |
| 4651 | } |
| 4652 | |
Joel Becker | 2b656c1 | 2008-11-25 19:00:15 -0800 | [diff] [blame] | 4653 | /* |
| 4654 | * Hey, if we're overwriting t_bucket, what difference does |
| 4655 | * ACCESS_CREATE vs ACCESS_WRITE make? See the comment in the |
| 4656 | * same part of ocfs2_cp_xattr_bucket(). |
| 4657 | */ |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 4658 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
Joel Becker | 1224be0 | 2008-10-24 18:47:33 -0700 | [diff] [blame] | 4659 | new_bucket_head ? |
| 4660 | OCFS2_JOURNAL_ACCESS_CREATE : |
| 4661 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 4662 | if (ret) { |
| 4663 | mlog_errno(ret); |
| 4664 | goto out; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4665 | } |
| 4666 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 4667 | xh = bucket_xh(s_bucket); |
Tao Ma | 80bcaf3 | 2008-10-27 06:06:24 +0800 | [diff] [blame] | 4668 | count = le16_to_cpu(xh->xh_count); |
| 4669 | start = ocfs2_xattr_find_divide_pos(xh); |
| 4670 | |
| 4671 | if (start == count) { |
| 4672 | xe = &xh->xh_entries[start-1]; |
| 4673 | |
| 4674 | /* |
| 4675 | * initialized a new empty bucket here. |
| 4676 | * The hash value is set as one larger than |
| 4677 | * that of the last entry in the previous bucket. |
| 4678 | */ |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 4679 | for (i = 0; i < t_bucket->bu_blocks; i++) |
| 4680 | memset(bucket_block(t_bucket, i), 0, blocksize); |
Tao Ma | 80bcaf3 | 2008-10-27 06:06:24 +0800 | [diff] [blame] | 4681 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 4682 | xh = bucket_xh(t_bucket); |
Tao Ma | 80bcaf3 | 2008-10-27 06:06:24 +0800 | [diff] [blame] | 4683 | xh->xh_free_start = cpu_to_le16(blocksize); |
| 4684 | xh->xh_entries[0].xe_name_hash = xe->xe_name_hash; |
| 4685 | le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1); |
| 4686 | |
| 4687 | goto set_num_buckets; |
| 4688 | } |
| 4689 | |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4690 | /* copy the whole bucket to the new first. */ |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 4691 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4692 | |
| 4693 | /* update the new bucket. */ |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 4694 | xh = bucket_xh(t_bucket); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4695 | |
| 4696 | /* |
| 4697 | * Calculate the total name/value len and xh_free_start for |
| 4698 | * the old bucket first. |
| 4699 | */ |
| 4700 | name_offset = OCFS2_XATTR_BUCKET_SIZE; |
| 4701 | name_value_len = 0; |
| 4702 | for (i = 0; i < start; i++) { |
| 4703 | xe = &xh->xh_entries[i]; |
Joel Becker | 199799a | 2009-08-14 19:04:15 -0700 | [diff] [blame] | 4704 | name_value_len += namevalue_size_xe(xe); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4705 | if (le16_to_cpu(xe->xe_name_offset) < name_offset) |
| 4706 | name_offset = le16_to_cpu(xe->xe_name_offset); |
| 4707 | } |
| 4708 | |
| 4709 | /* |
| 4710 | * Now begin the modification to the new bucket. |
| 4711 | * |
| 4712 | * In the new bucket, We just move the xattr entry to the beginning |
| 4713 | * and don't touch the name/value. So there will be some holes in the |
| 4714 | * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is |
| 4715 | * called. |
| 4716 | */ |
| 4717 | xe = &xh->xh_entries[start]; |
| 4718 | len = sizeof(struct ocfs2_xattr_entry) * (count - start); |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 4719 | trace_ocfs2_divide_xattr_bucket_move(len, |
| 4720 | (int)((char *)xe - (char *)xh), |
| 4721 | (int)((char *)xh->xh_entries - (char *)xh)); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4722 | memmove((char *)xh->xh_entries, (char *)xe, len); |
| 4723 | xe = &xh->xh_entries[count - start]; |
| 4724 | len = sizeof(struct ocfs2_xattr_entry) * start; |
| 4725 | memset((char *)xe, 0, len); |
| 4726 | |
| 4727 | le16_add_cpu(&xh->xh_count, -start); |
| 4728 | le16_add_cpu(&xh->xh_name_value_len, -name_value_len); |
| 4729 | |
| 4730 | /* Calculate xh_free_start for the new bucket. */ |
| 4731 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); |
| 4732 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { |
| 4733 | xe = &xh->xh_entries[i]; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4734 | if (le16_to_cpu(xe->xe_name_offset) < |
| 4735 | le16_to_cpu(xh->xh_free_start)) |
| 4736 | xh->xh_free_start = xe->xe_name_offset; |
| 4737 | } |
| 4738 | |
Tao Ma | 80bcaf3 | 2008-10-27 06:06:24 +0800 | [diff] [blame] | 4739 | set_num_buckets: |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4740 | /* set xh->xh_num_buckets for the new xh. */ |
| 4741 | if (new_bucket_head) |
| 4742 | xh->xh_num_buckets = cpu_to_le16(1); |
| 4743 | else |
| 4744 | xh->xh_num_buckets = 0; |
| 4745 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 4746 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4747 | |
| 4748 | /* store the first_hash of the new bucket. */ |
| 4749 | if (first_hash) |
| 4750 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); |
| 4751 | |
| 4752 | /* |
Tao Ma | 80bcaf3 | 2008-10-27 06:06:24 +0800 | [diff] [blame] | 4753 | * Now only update the 1st block of the old bucket. If we |
| 4754 | * just added a new empty bucket, there is no need to modify |
| 4755 | * it. |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4756 | */ |
Tao Ma | 80bcaf3 | 2008-10-27 06:06:24 +0800 | [diff] [blame] | 4757 | if (start == count) |
| 4758 | goto out; |
| 4759 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 4760 | xh = bucket_xh(s_bucket); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4761 | memset(&xh->xh_entries[start], 0, |
| 4762 | sizeof(struct ocfs2_xattr_entry) * (count - start)); |
| 4763 | xh->xh_count = cpu_to_le16(start); |
| 4764 | xh->xh_free_start = cpu_to_le16(name_offset); |
| 4765 | xh->xh_name_value_len = cpu_to_le16(name_value_len); |
| 4766 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 4767 | ocfs2_xattr_bucket_journal_dirty(handle, s_bucket); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4768 | |
| 4769 | out: |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 4770 | ocfs2_xattr_bucket_free(s_bucket); |
| 4771 | ocfs2_xattr_bucket_free(t_bucket); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4772 | |
| 4773 | return ret; |
| 4774 | } |
| 4775 | |
| 4776 | /* |
| 4777 | * Copy xattr from one bucket to another bucket. |
| 4778 | * |
| 4779 | * The caller must make sure that the journal transaction |
| 4780 | * has enough space for journaling. |
| 4781 | */ |
| 4782 | static int ocfs2_cp_xattr_bucket(struct inode *inode, |
| 4783 | handle_t *handle, |
| 4784 | u64 s_blkno, |
| 4785 | u64 t_blkno, |
| 4786 | int t_is_new) |
| 4787 | { |
Joel Becker | 4980c6d | 2008-10-24 18:54:43 -0700 | [diff] [blame] | 4788 | int ret; |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 4789 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4790 | |
| 4791 | BUG_ON(s_blkno == t_blkno); |
| 4792 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 4793 | trace_ocfs2_cp_xattr_bucket((unsigned long long)s_blkno, |
| 4794 | (unsigned long long)t_blkno, |
| 4795 | t_is_new); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4796 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 4797 | s_bucket = ocfs2_xattr_bucket_new(inode); |
| 4798 | t_bucket = ocfs2_xattr_bucket_new(inode); |
| 4799 | if (!s_bucket || !t_bucket) { |
| 4800 | ret = -ENOMEM; |
| 4801 | mlog_errno(ret); |
| 4802 | goto out; |
| 4803 | } |
Joel Becker | 92de109 | 2008-11-25 17:06:40 -0800 | [diff] [blame] | 4804 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 4805 | ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4806 | if (ret) |
| 4807 | goto out; |
| 4808 | |
Joel Becker | 784b816 | 2008-10-24 17:33:40 -0700 | [diff] [blame] | 4809 | /* |
| 4810 | * Even if !t_is_new, we're overwriting t_bucket. Thus, |
| 4811 | * there's no need to read it. |
| 4812 | */ |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 4813 | ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4814 | if (ret) |
| 4815 | goto out; |
| 4816 | |
Joel Becker | 2b656c1 | 2008-11-25 19:00:15 -0800 | [diff] [blame] | 4817 | /* |
| 4818 | * Hey, if we're overwriting t_bucket, what difference does |
| 4819 | * ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new |
Joel Becker | 874d65a | 2008-11-26 13:02:18 -0800 | [diff] [blame] | 4820 | * cluster to fill, we came here from |
| 4821 | * ocfs2_mv_xattr_buckets(), and it is really new - |
| 4822 | * ACCESS_CREATE is required. But we also might have moved data |
| 4823 | * out of t_bucket before extending back into it. |
| 4824 | * ocfs2_add_new_xattr_bucket() can do this - its call to |
| 4825 | * ocfs2_add_new_xattr_cluster() may have created a new extent |
Joel Becker | 2b656c1 | 2008-11-25 19:00:15 -0800 | [diff] [blame] | 4826 | * and copied out the end of the old extent. Then it re-extends |
| 4827 | * the old extent back to create space for new xattrs. That's |
| 4828 | * how we get here, and the bucket isn't really new. |
| 4829 | */ |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 4830 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
Joel Becker | 1224be0 | 2008-10-24 18:47:33 -0700 | [diff] [blame] | 4831 | t_is_new ? |
| 4832 | OCFS2_JOURNAL_ACCESS_CREATE : |
| 4833 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 4834 | if (ret) |
| 4835 | goto out; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4836 | |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 4837 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
| 4838 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4839 | |
| 4840 | out: |
Joel Becker | ba93712 | 2008-10-24 19:13:20 -0700 | [diff] [blame] | 4841 | ocfs2_xattr_bucket_free(t_bucket); |
| 4842 | ocfs2_xattr_bucket_free(s_bucket); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4843 | |
| 4844 | return ret; |
| 4845 | } |
| 4846 | |
| 4847 | /* |
Joel Becker | 874d65a | 2008-11-26 13:02:18 -0800 | [diff] [blame] | 4848 | * src_blk points to the start of an existing extent. last_blk points to |
| 4849 | * last cluster in that extent. to_blk points to a newly allocated |
Joel Becker | 54ecb6b | 2008-11-26 13:18:31 -0800 | [diff] [blame] | 4850 | * extent. We copy the buckets from the cluster at last_blk to the new |
| 4851 | * extent. If start_bucket is non-zero, we skip that many buckets before |
| 4852 | * we start copying. The new extent's xh_num_buckets gets set to the |
| 4853 | * number of buckets we copied. The old extent's xh_num_buckets shrinks |
| 4854 | * by the same amount. |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4855 | */ |
Joel Becker | 54ecb6b | 2008-11-26 13:18:31 -0800 | [diff] [blame] | 4856 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
| 4857 | u64 src_blk, u64 last_blk, u64 to_blk, |
| 4858 | unsigned int start_bucket, |
| 4859 | u32 *first_hash) |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4860 | { |
| 4861 | int i, ret, credits; |
| 4862 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Joel Becker | 15d6092 | 2008-11-25 18:36:42 -0800 | [diff] [blame] | 4863 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4864 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); |
Joel Becker | 15d6092 | 2008-11-25 18:36:42 -0800 | [diff] [blame] | 4865 | struct ocfs2_xattr_bucket *old_first, *new_first; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4866 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 4867 | trace_ocfs2_mv_xattr_buckets((unsigned long long)last_blk, |
| 4868 | (unsigned long long)to_blk); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4869 | |
Joel Becker | 54ecb6b | 2008-11-26 13:18:31 -0800 | [diff] [blame] | 4870 | BUG_ON(start_bucket >= num_buckets); |
| 4871 | if (start_bucket) { |
| 4872 | num_buckets -= start_bucket; |
| 4873 | last_blk += (start_bucket * blks_per_bucket); |
| 4874 | } |
| 4875 | |
Joel Becker | 15d6092 | 2008-11-25 18:36:42 -0800 | [diff] [blame] | 4876 | /* The first bucket of the original extent */ |
| 4877 | old_first = ocfs2_xattr_bucket_new(inode); |
| 4878 | /* The first bucket of the new extent */ |
| 4879 | new_first = ocfs2_xattr_bucket_new(inode); |
| 4880 | if (!old_first || !new_first) { |
| 4881 | ret = -ENOMEM; |
| 4882 | mlog_errno(ret); |
| 4883 | goto out; |
| 4884 | } |
| 4885 | |
Joel Becker | 874d65a | 2008-11-26 13:02:18 -0800 | [diff] [blame] | 4886 | ret = ocfs2_read_xattr_bucket(old_first, src_blk); |
Joel Becker | 15d6092 | 2008-11-25 18:36:42 -0800 | [diff] [blame] | 4887 | if (ret) { |
| 4888 | mlog_errno(ret); |
| 4889 | goto out; |
| 4890 | } |
| 4891 | |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4892 | /* |
Joel Becker | 54ecb6b | 2008-11-26 13:18:31 -0800 | [diff] [blame] | 4893 | * We need to update the first bucket of the old extent and all |
| 4894 | * the buckets going to the new extent. |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4895 | */ |
Tao Ma | c901fb0 | 2010-04-26 14:34:57 +0800 | [diff] [blame] | 4896 | credits = ((num_buckets + 1) * blks_per_bucket); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4897 | ret = ocfs2_extend_trans(handle, credits); |
| 4898 | if (ret) { |
| 4899 | mlog_errno(ret); |
| 4900 | goto out; |
| 4901 | } |
| 4902 | |
Joel Becker | 15d6092 | 2008-11-25 18:36:42 -0800 | [diff] [blame] | 4903 | ret = ocfs2_xattr_bucket_journal_access(handle, old_first, |
| 4904 | OCFS2_JOURNAL_ACCESS_WRITE); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4905 | if (ret) { |
| 4906 | mlog_errno(ret); |
| 4907 | goto out; |
| 4908 | } |
| 4909 | |
| 4910 | for (i = 0; i < num_buckets; i++) { |
| 4911 | ret = ocfs2_cp_xattr_bucket(inode, handle, |
Joel Becker | 874d65a | 2008-11-26 13:02:18 -0800 | [diff] [blame] | 4912 | last_blk + (i * blks_per_bucket), |
Joel Becker | 15d6092 | 2008-11-25 18:36:42 -0800 | [diff] [blame] | 4913 | to_blk + (i * blks_per_bucket), |
| 4914 | 1); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4915 | if (ret) { |
| 4916 | mlog_errno(ret); |
| 4917 | goto out; |
| 4918 | } |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4919 | } |
| 4920 | |
Joel Becker | 15d6092 | 2008-11-25 18:36:42 -0800 | [diff] [blame] | 4921 | /* |
| 4922 | * Get the new bucket ready before we dirty anything |
| 4923 | * (This actually shouldn't fail, because we already dirtied |
| 4924 | * it once in ocfs2_cp_xattr_bucket()). |
| 4925 | */ |
| 4926 | ret = ocfs2_read_xattr_bucket(new_first, to_blk); |
| 4927 | if (ret) { |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4928 | mlog_errno(ret); |
| 4929 | goto out; |
| 4930 | } |
Joel Becker | 15d6092 | 2008-11-25 18:36:42 -0800 | [diff] [blame] | 4931 | ret = ocfs2_xattr_bucket_journal_access(handle, new_first, |
| 4932 | OCFS2_JOURNAL_ACCESS_WRITE); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4933 | if (ret) { |
| 4934 | mlog_errno(ret); |
| 4935 | goto out; |
| 4936 | } |
| 4937 | |
Joel Becker | 15d6092 | 2008-11-25 18:36:42 -0800 | [diff] [blame] | 4938 | /* Now update the headers */ |
| 4939 | le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets); |
| 4940 | ocfs2_xattr_bucket_journal_dirty(handle, old_first); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4941 | |
Joel Becker | 15d6092 | 2008-11-25 18:36:42 -0800 | [diff] [blame] | 4942 | bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets); |
| 4943 | ocfs2_xattr_bucket_journal_dirty(handle, new_first); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4944 | |
| 4945 | if (first_hash) |
Joel Becker | 15d6092 | 2008-11-25 18:36:42 -0800 | [diff] [blame] | 4946 | *first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash); |
| 4947 | |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4948 | out: |
Joel Becker | 15d6092 | 2008-11-25 18:36:42 -0800 | [diff] [blame] | 4949 | ocfs2_xattr_bucket_free(new_first); |
| 4950 | ocfs2_xattr_bucket_free(old_first); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4951 | return ret; |
| 4952 | } |
| 4953 | |
| 4954 | /* |
Tao Ma | 80bcaf3 | 2008-10-27 06:06:24 +0800 | [diff] [blame] | 4955 | * Move some xattrs in this cluster to the new cluster. |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4956 | * This function should only be called when bucket size == cluster size. |
| 4957 | * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead. |
| 4958 | */ |
Tao Ma | 80bcaf3 | 2008-10-27 06:06:24 +0800 | [diff] [blame] | 4959 | static int ocfs2_divide_xattr_cluster(struct inode *inode, |
| 4960 | handle_t *handle, |
| 4961 | u64 prev_blk, |
| 4962 | u64 new_blk, |
| 4963 | u32 *first_hash) |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4964 | { |
| 4965 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
Tao Ma | c901fb0 | 2010-04-26 14:34:57 +0800 | [diff] [blame] | 4966 | int ret, credits = 2 * blk_per_bucket; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4967 | |
| 4968 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize); |
| 4969 | |
| 4970 | ret = ocfs2_extend_trans(handle, credits); |
| 4971 | if (ret) { |
| 4972 | mlog_errno(ret); |
| 4973 | return ret; |
| 4974 | } |
| 4975 | |
| 4976 | /* Move half of the xattr in start_blk to the next bucket. */ |
Tao Ma | 80bcaf3 | 2008-10-27 06:06:24 +0800 | [diff] [blame] | 4977 | return ocfs2_divide_xattr_bucket(inode, handle, prev_blk, |
| 4978 | new_blk, first_hash, 1); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 4979 | } |
| 4980 | |
| 4981 | /* |
| 4982 | * Move some xattrs from the old cluster to the new one since they are not |
| 4983 | * contiguous in ocfs2 xattr tree. |
| 4984 | * |
| 4985 | * new_blk starts a new separate cluster, and we will move some xattrs from |
| 4986 | * prev_blk to it. v_start will be set as the first name hash value in this |
| 4987 | * new cluster so that it can be used as e_cpos during tree insertion and |
| 4988 | * don't collide with our original b-tree operations. first_bh and header_bh |
| 4989 | * will also be updated since they will be used in ocfs2_extend_xattr_bucket |
| 4990 | * to extend the insert bucket. |
| 4991 | * |
| 4992 | * The problem is how much xattr should we move to the new one and when should |
| 4993 | * we update first_bh and header_bh? |
| 4994 | * 1. If cluster size > bucket size, that means the previous cluster has more |
| 4995 | * than 1 bucket, so just move half nums of bucket into the new cluster and |
| 4996 | * update the first_bh and header_bh if the insert bucket has been moved |
| 4997 | * to the new cluster. |
| 4998 | * 2. If cluster_size == bucket_size: |
| 4999 | * a) If the previous extent rec has more than one cluster and the insert |
| 5000 | * place isn't in the last cluster, copy the entire last cluster to the |
| 5001 | * new one. This time, we don't need to upate the first_bh and header_bh |
| 5002 | * since they will not be moved into the new cluster. |
| 5003 | * b) Otherwise, move the bottom half of the xattrs in the last cluster into |
| 5004 | * the new one. And we set the extend flag to zero if the insert place is |
| 5005 | * moved into the new allocated cluster since no extend is needed. |
| 5006 | */ |
| 5007 | static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode, |
| 5008 | handle_t *handle, |
Joel Becker | 012ee91 | 2008-11-26 14:43:31 -0800 | [diff] [blame] | 5009 | struct ocfs2_xattr_bucket *first, |
| 5010 | struct ocfs2_xattr_bucket *target, |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5011 | u64 new_blk, |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5012 | u32 prev_clusters, |
| 5013 | u32 *v_start, |
| 5014 | int *extend) |
| 5015 | { |
Joel Becker | 92cf3ad | 2008-11-26 14:12:09 -0800 | [diff] [blame] | 5016 | int ret; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5017 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 5018 | trace_ocfs2_adjust_xattr_cross_cluster( |
| 5019 | (unsigned long long)bucket_blkno(first), |
| 5020 | (unsigned long long)new_blk, prev_clusters); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5021 | |
Joel Becker | 41cb814 | 2008-11-26 14:25:21 -0800 | [diff] [blame] | 5022 | if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) { |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5023 | ret = ocfs2_mv_xattr_bucket_cross_cluster(inode, |
| 5024 | handle, |
Joel Becker | 41cb814 | 2008-11-26 14:25:21 -0800 | [diff] [blame] | 5025 | first, target, |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5026 | new_blk, |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5027 | prev_clusters, |
| 5028 | v_start); |
Joel Becker | 012ee91 | 2008-11-26 14:43:31 -0800 | [diff] [blame] | 5029 | if (ret) |
Joel Becker | 41cb814 | 2008-11-26 14:25:21 -0800 | [diff] [blame] | 5030 | mlog_errno(ret); |
Joel Becker | 41cb814 | 2008-11-26 14:25:21 -0800 | [diff] [blame] | 5031 | } else { |
Joel Becker | 92cf3ad | 2008-11-26 14:12:09 -0800 | [diff] [blame] | 5032 | /* The start of the last cluster in the first extent */ |
| 5033 | u64 last_blk = bucket_blkno(first) + |
| 5034 | ((prev_clusters - 1) * |
| 5035 | ocfs2_clusters_to_blocks(inode->i_sb, 1)); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5036 | |
Joel Becker | 012ee91 | 2008-11-26 14:43:31 -0800 | [diff] [blame] | 5037 | if (prev_clusters > 1 && bucket_blkno(target) != last_blk) { |
Joel Becker | 874d65a | 2008-11-26 13:02:18 -0800 | [diff] [blame] | 5038 | ret = ocfs2_mv_xattr_buckets(inode, handle, |
Joel Becker | 92cf3ad | 2008-11-26 14:12:09 -0800 | [diff] [blame] | 5039 | bucket_blkno(first), |
Joel Becker | 54ecb6b | 2008-11-26 13:18:31 -0800 | [diff] [blame] | 5040 | last_blk, new_blk, 0, |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5041 | v_start); |
Joel Becker | 012ee91 | 2008-11-26 14:43:31 -0800 | [diff] [blame] | 5042 | if (ret) |
| 5043 | mlog_errno(ret); |
| 5044 | } else { |
Tao Ma | 80bcaf3 | 2008-10-27 06:06:24 +0800 | [diff] [blame] | 5045 | ret = ocfs2_divide_xattr_cluster(inode, handle, |
| 5046 | last_blk, new_blk, |
| 5047 | v_start); |
Joel Becker | 012ee91 | 2008-11-26 14:43:31 -0800 | [diff] [blame] | 5048 | if (ret) |
| 5049 | mlog_errno(ret); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5050 | |
Joel Becker | 92cf3ad | 2008-11-26 14:12:09 -0800 | [diff] [blame] | 5051 | if ((bucket_blkno(target) == last_blk) && extend) |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5052 | *extend = 0; |
| 5053 | } |
| 5054 | } |
| 5055 | |
| 5056 | return ret; |
| 5057 | } |
| 5058 | |
| 5059 | /* |
| 5060 | * Add a new cluster for xattr storage. |
| 5061 | * |
| 5062 | * If the new cluster is contiguous with the previous one, it will be |
| 5063 | * appended to the same extent record, and num_clusters will be updated. |
| 5064 | * If not, we will insert a new extent for it and move some xattrs in |
| 5065 | * the last cluster into the new allocated one. |
| 5066 | * We also need to limit the maximum size of a btree leaf, otherwise we'll |
| 5067 | * lose the benefits of hashing because we'll have to search large leaves. |
| 5068 | * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize, |
| 5069 | * if it's bigger). |
| 5070 | * |
| 5071 | * first_bh is the first block of the previous extent rec and header_bh |
| 5072 | * indicates the bucket we will insert the new xattrs. They will be updated |
| 5073 | * when the header_bh is moved into the new cluster. |
| 5074 | */ |
| 5075 | static int ocfs2_add_new_xattr_cluster(struct inode *inode, |
| 5076 | struct buffer_head *root_bh, |
Joel Becker | ed29c0c | 2008-11-26 15:08:44 -0800 | [diff] [blame] | 5077 | struct ocfs2_xattr_bucket *first, |
| 5078 | struct ocfs2_xattr_bucket *target, |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5079 | u32 *num_clusters, |
| 5080 | u32 prev_cpos, |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 5081 | int *extend, |
| 5082 | struct ocfs2_xattr_set_ctxt *ctxt) |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5083 | { |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 5084 | int ret; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5085 | u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); |
| 5086 | u32 prev_clusters = *num_clusters; |
| 5087 | u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0; |
| 5088 | u64 block; |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 5089 | handle_t *handle = ctxt->handle; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5090 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 5091 | struct ocfs2_extent_tree et; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5092 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 5093 | trace_ocfs2_add_new_xattr_cluster_begin( |
| 5094 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 5095 | (unsigned long long)bucket_blkno(first), |
| 5096 | prev_cpos, prev_clusters); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5097 | |
Joel Becker | 5e404e9 | 2009-02-13 03:54:22 -0800 | [diff] [blame] | 5098 | ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh); |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 5099 | |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 5100 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh, |
Joel Becker | 8400897 | 2008-12-09 16:11:49 -0800 | [diff] [blame] | 5101 | OCFS2_JOURNAL_ACCESS_WRITE); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5102 | if (ret < 0) { |
| 5103 | mlog_errno(ret); |
| 5104 | goto leave; |
| 5105 | } |
| 5106 | |
Joel Becker | 1ed9b77 | 2010-05-06 13:59:06 +0800 | [diff] [blame] | 5107 | ret = __ocfs2_claim_clusters(handle, ctxt->data_ac, 1, |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5108 | clusters_to_add, &bit_off, &num_bits); |
| 5109 | if (ret < 0) { |
| 5110 | if (ret != -ENOSPC) |
| 5111 | mlog_errno(ret); |
| 5112 | goto leave; |
| 5113 | } |
| 5114 | |
| 5115 | BUG_ON(num_bits > clusters_to_add); |
| 5116 | |
| 5117 | block = ocfs2_clusters_to_blocks(osb->sb, bit_off); |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 5118 | trace_ocfs2_add_new_xattr_cluster((unsigned long long)block, num_bits); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5119 | |
Joel Becker | ed29c0c | 2008-11-26 15:08:44 -0800 | [diff] [blame] | 5120 | if (bucket_blkno(first) + (prev_clusters * bpc) == block && |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5121 | (prev_clusters + num_bits) << osb->s_clustersize_bits <= |
| 5122 | OCFS2_MAX_XATTR_TREE_LEAF_SIZE) { |
| 5123 | /* |
| 5124 | * If this cluster is contiguous with the old one and |
| 5125 | * adding this new cluster, we don't surpass the limit of |
| 5126 | * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be |
| 5127 | * initialized and used like other buckets in the previous |
| 5128 | * cluster. |
| 5129 | * So add it as a contiguous one. The caller will handle |
| 5130 | * its init process. |
| 5131 | */ |
| 5132 | v_start = prev_cpos + prev_clusters; |
| 5133 | *num_clusters = prev_clusters + num_bits; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5134 | } else { |
| 5135 | ret = ocfs2_adjust_xattr_cross_cluster(inode, |
| 5136 | handle, |
Joel Becker | 012ee91 | 2008-11-26 14:43:31 -0800 | [diff] [blame] | 5137 | first, |
| 5138 | target, |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5139 | block, |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5140 | prev_clusters, |
| 5141 | &v_start, |
| 5142 | extend); |
| 5143 | if (ret) { |
| 5144 | mlog_errno(ret); |
| 5145 | goto leave; |
| 5146 | } |
| 5147 | } |
| 5148 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 5149 | trace_ocfs2_add_new_xattr_cluster_insert((unsigned long long)block, |
| 5150 | v_start, num_bits); |
Joel Becker | cc79d8c | 2009-02-13 03:24:43 -0800 | [diff] [blame] | 5151 | ret = ocfs2_insert_extent(handle, &et, v_start, block, |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 5152 | num_bits, 0, ctxt->meta_ac); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5153 | if (ret < 0) { |
| 5154 | mlog_errno(ret); |
| 5155 | goto leave; |
| 5156 | } |
| 5157 | |
Joel Becker | ec20cec | 2010-03-19 14:13:52 -0700 | [diff] [blame] | 5158 | ocfs2_journal_dirty(handle, root_bh); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5159 | |
| 5160 | leave: |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5161 | return ret; |
| 5162 | } |
| 5163 | |
| 5164 | /* |
Joel Becker | 92de109 | 2008-11-25 17:06:40 -0800 | [diff] [blame] | 5165 | * We are given an extent. 'first' is the bucket at the very front of |
| 5166 | * the extent. The extent has space for an additional bucket past |
| 5167 | * bucket_xh(first)->xh_num_buckets. 'target_blkno' is the block number |
| 5168 | * of the target bucket. We wish to shift every bucket past the target |
| 5169 | * down one, filling in that additional space. When we get back to the |
| 5170 | * target, we split the target between itself and the now-empty bucket |
| 5171 | * at target+1 (aka, target_blkno + blks_per_bucket). |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5172 | */ |
| 5173 | static int ocfs2_extend_xattr_bucket(struct inode *inode, |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 5174 | handle_t *handle, |
Joel Becker | 92de109 | 2008-11-25 17:06:40 -0800 | [diff] [blame] | 5175 | struct ocfs2_xattr_bucket *first, |
| 5176 | u64 target_blk, |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5177 | u32 num_clusters) |
| 5178 | { |
| 5179 | int ret, credits; |
| 5180 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 5181 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
Joel Becker | 92de109 | 2008-11-25 17:06:40 -0800 | [diff] [blame] | 5182 | u64 end_blk; |
| 5183 | u16 new_bucket = le16_to_cpu(bucket_xh(first)->xh_num_buckets); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5184 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 5185 | trace_ocfs2_extend_xattr_bucket((unsigned long long)target_blk, |
| 5186 | (unsigned long long)bucket_blkno(first), |
| 5187 | num_clusters, new_bucket); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5188 | |
Joel Becker | 92de109 | 2008-11-25 17:06:40 -0800 | [diff] [blame] | 5189 | /* The extent must have room for an additional bucket */ |
| 5190 | BUG_ON(new_bucket >= |
| 5191 | (num_clusters * ocfs2_xattr_buckets_per_cluster(osb))); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5192 | |
Joel Becker | 92de109 | 2008-11-25 17:06:40 -0800 | [diff] [blame] | 5193 | /* end_blk points to the last existing bucket */ |
| 5194 | end_blk = bucket_blkno(first) + ((new_bucket - 1) * blk_per_bucket); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5195 | |
| 5196 | /* |
Joel Becker | 92de109 | 2008-11-25 17:06:40 -0800 | [diff] [blame] | 5197 | * end_blk is the start of the last existing bucket. |
| 5198 | * Thus, (end_blk - target_blk) covers the target bucket and |
| 5199 | * every bucket after it up to, but not including, the last |
| 5200 | * existing bucket. Then we add the last existing bucket, the |
| 5201 | * new bucket, and the first bucket (3 * blk_per_bucket). |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5202 | */ |
Tao Ma | c901fb0 | 2010-04-26 14:34:57 +0800 | [diff] [blame] | 5203 | credits = (end_blk - target_blk) + (3 * blk_per_bucket); |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 5204 | ret = ocfs2_extend_trans(handle, credits); |
| 5205 | if (ret) { |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5206 | mlog_errno(ret); |
| 5207 | goto out; |
| 5208 | } |
| 5209 | |
Joel Becker | 92de109 | 2008-11-25 17:06:40 -0800 | [diff] [blame] | 5210 | ret = ocfs2_xattr_bucket_journal_access(handle, first, |
| 5211 | OCFS2_JOURNAL_ACCESS_WRITE); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5212 | if (ret) { |
| 5213 | mlog_errno(ret); |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 5214 | goto out; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5215 | } |
| 5216 | |
Joel Becker | 92de109 | 2008-11-25 17:06:40 -0800 | [diff] [blame] | 5217 | while (end_blk != target_blk) { |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5218 | ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk, |
| 5219 | end_blk + blk_per_bucket, 0); |
| 5220 | if (ret) |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 5221 | goto out; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5222 | end_blk -= blk_per_bucket; |
| 5223 | } |
| 5224 | |
Joel Becker | 92de109 | 2008-11-25 17:06:40 -0800 | [diff] [blame] | 5225 | /* Move half of the xattr in target_blkno to the next bucket. */ |
| 5226 | ret = ocfs2_divide_xattr_bucket(inode, handle, target_blk, |
| 5227 | target_blk + blk_per_bucket, NULL, 0); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5228 | |
Joel Becker | 92de109 | 2008-11-25 17:06:40 -0800 | [diff] [blame] | 5229 | le16_add_cpu(&bucket_xh(first)->xh_num_buckets, 1); |
| 5230 | ocfs2_xattr_bucket_journal_dirty(handle, first); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5231 | |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5232 | out: |
| 5233 | return ret; |
| 5234 | } |
| 5235 | |
| 5236 | /* |
Joel Becker | 91f2033 | 2008-11-26 15:25:41 -0800 | [diff] [blame] | 5237 | * Add new xattr bucket in an extent record and adjust the buckets |
| 5238 | * accordingly. xb_bh is the ocfs2_xattr_block, and target is the |
| 5239 | * bucket we want to insert into. |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5240 | * |
Joel Becker | 91f2033 | 2008-11-26 15:25:41 -0800 | [diff] [blame] | 5241 | * In the easy case, we will move all the buckets after target down by |
| 5242 | * one. Half of target's xattrs will be moved to the next bucket. |
| 5243 | * |
| 5244 | * If current cluster is full, we'll allocate a new one. This may not |
| 5245 | * be contiguous. The underlying calls will make sure that there is |
| 5246 | * space for the insert, shifting buckets around if necessary. |
| 5247 | * 'target' may be moved by those calls. |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5248 | */ |
| 5249 | static int ocfs2_add_new_xattr_bucket(struct inode *inode, |
| 5250 | struct buffer_head *xb_bh, |
Joel Becker | 91f2033 | 2008-11-26 15:25:41 -0800 | [diff] [blame] | 5251 | struct ocfs2_xattr_bucket *target, |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 5252 | struct ocfs2_xattr_set_ctxt *ctxt) |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5253 | { |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5254 | struct ocfs2_xattr_block *xb = |
| 5255 | (struct ocfs2_xattr_block *)xb_bh->b_data; |
| 5256 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; |
| 5257 | struct ocfs2_extent_list *el = &xb_root->xt_list; |
Joel Becker | 91f2033 | 2008-11-26 15:25:41 -0800 | [diff] [blame] | 5258 | u32 name_hash = |
| 5259 | le32_to_cpu(bucket_xh(target)->xh_entries[0].xe_name_hash); |
Joel Becker | ed29c0c | 2008-11-26 15:08:44 -0800 | [diff] [blame] | 5260 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5261 | int ret, num_buckets, extend = 1; |
| 5262 | u64 p_blkno; |
| 5263 | u32 e_cpos, num_clusters; |
Joel Becker | 92de109 | 2008-11-25 17:06:40 -0800 | [diff] [blame] | 5264 | /* The bucket at the front of the extent */ |
Joel Becker | 91f2033 | 2008-11-26 15:25:41 -0800 | [diff] [blame] | 5265 | struct ocfs2_xattr_bucket *first; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5266 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 5267 | trace_ocfs2_add_new_xattr_bucket( |
| 5268 | (unsigned long long)bucket_blkno(target)); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5269 | |
Joel Becker | ed29c0c | 2008-11-26 15:08:44 -0800 | [diff] [blame] | 5270 | /* The first bucket of the original extent */ |
Joel Becker | 92de109 | 2008-11-25 17:06:40 -0800 | [diff] [blame] | 5271 | first = ocfs2_xattr_bucket_new(inode); |
Joel Becker | 91f2033 | 2008-11-26 15:25:41 -0800 | [diff] [blame] | 5272 | if (!first) { |
Joel Becker | 92de109 | 2008-11-25 17:06:40 -0800 | [diff] [blame] | 5273 | ret = -ENOMEM; |
| 5274 | mlog_errno(ret); |
| 5275 | goto out; |
| 5276 | } |
| 5277 | |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5278 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos, |
| 5279 | &num_clusters, el); |
| 5280 | if (ret) { |
| 5281 | mlog_errno(ret); |
| 5282 | goto out; |
| 5283 | } |
| 5284 | |
Joel Becker | ed29c0c | 2008-11-26 15:08:44 -0800 | [diff] [blame] | 5285 | ret = ocfs2_read_xattr_bucket(first, p_blkno); |
| 5286 | if (ret) { |
| 5287 | mlog_errno(ret); |
| 5288 | goto out; |
| 5289 | } |
| 5290 | |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5291 | num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters; |
Joel Becker | ed29c0c | 2008-11-26 15:08:44 -0800 | [diff] [blame] | 5292 | if (num_buckets == le16_to_cpu(bucket_xh(first)->xh_num_buckets)) { |
| 5293 | /* |
| 5294 | * This can move first+target if the target bucket moves |
| 5295 | * to the new extent. |
| 5296 | */ |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5297 | ret = ocfs2_add_new_xattr_cluster(inode, |
| 5298 | xb_bh, |
Joel Becker | ed29c0c | 2008-11-26 15:08:44 -0800 | [diff] [blame] | 5299 | first, |
| 5300 | target, |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5301 | &num_clusters, |
| 5302 | e_cpos, |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 5303 | &extend, |
| 5304 | ctxt); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5305 | if (ret) { |
| 5306 | mlog_errno(ret); |
| 5307 | goto out; |
| 5308 | } |
| 5309 | } |
| 5310 | |
Joel Becker | 92de109 | 2008-11-25 17:06:40 -0800 | [diff] [blame] | 5311 | if (extend) { |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5312 | ret = ocfs2_extend_xattr_bucket(inode, |
Tao Ma | 85db90e | 2008-11-12 08:27:01 +0800 | [diff] [blame] | 5313 | ctxt->handle, |
Joel Becker | ed29c0c | 2008-11-26 15:08:44 -0800 | [diff] [blame] | 5314 | first, |
| 5315 | bucket_blkno(target), |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5316 | num_clusters); |
Joel Becker | 92de109 | 2008-11-25 17:06:40 -0800 | [diff] [blame] | 5317 | if (ret) |
| 5318 | mlog_errno(ret); |
| 5319 | } |
| 5320 | |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5321 | out: |
Joel Becker | 92de109 | 2008-11-25 17:06:40 -0800 | [diff] [blame] | 5322 | ocfs2_xattr_bucket_free(first); |
Joel Becker | ed29c0c | 2008-11-26 15:08:44 -0800 | [diff] [blame] | 5323 | |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5324 | return ret; |
| 5325 | } |
| 5326 | |
| 5327 | static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode, |
| 5328 | struct ocfs2_xattr_bucket *bucket, |
| 5329 | int offs) |
| 5330 | { |
| 5331 | int block_off = offs >> inode->i_sb->s_blocksize_bits; |
| 5332 | |
| 5333 | offs = offs % inode->i_sb->s_blocksize; |
Joel Becker | 51def39 | 2008-10-24 16:57:21 -0700 | [diff] [blame] | 5334 | return bucket_block(bucket, block_off) + offs; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5335 | } |
| 5336 | |
| 5337 | /* |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5338 | * Truncate the specified xe_off entry in xattr bucket. |
| 5339 | * bucket is indicated by header_bh and len is the new length. |
| 5340 | * Both the ocfs2_xattr_value_root and the entry will be updated here. |
| 5341 | * |
| 5342 | * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed. |
| 5343 | */ |
| 5344 | static int ocfs2_xattr_bucket_value_truncate(struct inode *inode, |
Joel Becker | 548b0f2 | 2008-11-24 19:32:13 -0800 | [diff] [blame] | 5345 | struct ocfs2_xattr_bucket *bucket, |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5346 | int xe_off, |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 5347 | int len, |
| 5348 | struct ocfs2_xattr_set_ctxt *ctxt) |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5349 | { |
| 5350 | int ret, offset; |
| 5351 | u64 value_blk; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5352 | struct ocfs2_xattr_entry *xe; |
Joel Becker | 548b0f2 | 2008-11-24 19:32:13 -0800 | [diff] [blame] | 5353 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5354 | size_t blocksize = inode->i_sb->s_blocksize; |
Joel Becker | b3e5d37 | 2008-12-09 15:01:04 -0800 | [diff] [blame] | 5355 | struct ocfs2_xattr_value_buf vb = { |
| 5356 | .vb_access = ocfs2_journal_access, |
| 5357 | }; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5358 | |
| 5359 | xe = &xh->xh_entries[xe_off]; |
| 5360 | |
| 5361 | BUG_ON(!xe || ocfs2_xattr_is_local(xe)); |
| 5362 | |
| 5363 | offset = le16_to_cpu(xe->xe_name_offset) + |
| 5364 | OCFS2_XATTR_SIZE(xe->xe_name_len); |
| 5365 | |
| 5366 | value_blk = offset / blocksize; |
| 5367 | |
| 5368 | /* We don't allow ocfs2_xattr_value to be stored in different block. */ |
| 5369 | BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5370 | |
Joel Becker | b3e5d37 | 2008-12-09 15:01:04 -0800 | [diff] [blame] | 5371 | vb.vb_bh = bucket->bu_bhs[value_blk]; |
| 5372 | BUG_ON(!vb.vb_bh); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5373 | |
Joel Becker | b3e5d37 | 2008-12-09 15:01:04 -0800 | [diff] [blame] | 5374 | vb.vb_xv = (struct ocfs2_xattr_value_root *) |
| 5375 | (vb.vb_bh->b_data + offset % blocksize); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5376 | |
Joel Becker | 548b0f2 | 2008-11-24 19:32:13 -0800 | [diff] [blame] | 5377 | /* |
| 5378 | * From here on out we have to dirty the bucket. The generic |
| 5379 | * value calls only modify one of the bucket's bhs, but we need |
| 5380 | * to send the bucket at once. So if they error, they *could* have |
| 5381 | * modified something. We have to assume they did, and dirty |
| 5382 | * the whole bucket. This leaves us in a consistent state. |
| 5383 | */ |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 5384 | trace_ocfs2_xattr_bucket_value_truncate( |
| 5385 | (unsigned long long)bucket_blkno(bucket), xe_off, len); |
Joel Becker | b3e5d37 | 2008-12-09 15:01:04 -0800 | [diff] [blame] | 5386 | ret = ocfs2_xattr_value_truncate(inode, &vb, len, ctxt); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5387 | if (ret) { |
| 5388 | mlog_errno(ret); |
Tao Ma | 554e7f9 | 2009-01-08 08:21:43 +0800 | [diff] [blame] | 5389 | goto out; |
| 5390 | } |
| 5391 | |
| 5392 | ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket, |
| 5393 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 5394 | if (ret) { |
| 5395 | mlog_errno(ret); |
| 5396 | goto out; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5397 | } |
| 5398 | |
Joel Becker | 548b0f2 | 2008-11-24 19:32:13 -0800 | [diff] [blame] | 5399 | xe->xe_value_size = cpu_to_le64(len); |
| 5400 | |
Joel Becker | 548b0f2 | 2008-11-24 19:32:13 -0800 | [diff] [blame] | 5401 | ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5402 | |
| 5403 | out: |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5404 | return ret; |
| 5405 | } |
| 5406 | |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5407 | static int ocfs2_rm_xattr_cluster(struct inode *inode, |
| 5408 | struct buffer_head *root_bh, |
| 5409 | u64 blkno, |
| 5410 | u32 cpos, |
Tao Ma | 47bca49 | 2009-08-18 11:43:42 +0800 | [diff] [blame] | 5411 | u32 len, |
| 5412 | void *para) |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5413 | { |
| 5414 | int ret; |
| 5415 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 5416 | struct inode *tl_inode = osb->osb_tl_inode; |
| 5417 | handle_t *handle; |
| 5418 | struct ocfs2_xattr_block *xb = |
| 5419 | (struct ocfs2_xattr_block *)root_bh->b_data; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5420 | struct ocfs2_alloc_context *meta_ac = NULL; |
| 5421 | struct ocfs2_cached_dealloc_ctxt dealloc; |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 5422 | struct ocfs2_extent_tree et; |
| 5423 | |
Tao Ma | 47bca49 | 2009-08-18 11:43:42 +0800 | [diff] [blame] | 5424 | ret = ocfs2_iterate_xattr_buckets(inode, blkno, len, |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 5425 | ocfs2_delete_xattr_in_bucket, para); |
Tao Ma | 47bca49 | 2009-08-18 11:43:42 +0800 | [diff] [blame] | 5426 | if (ret) { |
| 5427 | mlog_errno(ret); |
| 5428 | return ret; |
| 5429 | } |
| 5430 | |
Joel Becker | 5e404e9 | 2009-02-13 03:54:22 -0800 | [diff] [blame] | 5431 | ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5432 | |
| 5433 | ocfs2_init_dealloc_ctxt(&dealloc); |
| 5434 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 5435 | trace_ocfs2_rm_xattr_cluster( |
| 5436 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 5437 | (unsigned long long)blkno, cpos, len); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5438 | |
Joel Becker | 8cb471e | 2009-02-10 20:00:41 -0800 | [diff] [blame] | 5439 | ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), blkno, |
| 5440 | len); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5441 | |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 5442 | ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5443 | if (ret) { |
| 5444 | mlog_errno(ret); |
| 5445 | return ret; |
| 5446 | } |
| 5447 | |
| 5448 | mutex_lock(&tl_inode->i_mutex); |
| 5449 | |
| 5450 | if (ocfs2_truncate_log_needs_flush(osb)) { |
| 5451 | ret = __ocfs2_flush_truncate_log(osb); |
| 5452 | if (ret < 0) { |
| 5453 | mlog_errno(ret); |
| 5454 | goto out; |
| 5455 | } |
| 5456 | } |
| 5457 | |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 5458 | handle = ocfs2_start_trans(osb, ocfs2_remove_extent_credits(osb->sb)); |
Tao Ma | d326479 | 2008-10-24 07:57:28 +0800 | [diff] [blame] | 5459 | if (IS_ERR(handle)) { |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5460 | ret = -ENOMEM; |
| 5461 | mlog_errno(ret); |
| 5462 | goto out; |
| 5463 | } |
| 5464 | |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 5465 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh, |
Joel Becker | 8400897 | 2008-12-09 16:11:49 -0800 | [diff] [blame] | 5466 | OCFS2_JOURNAL_ACCESS_WRITE); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5467 | if (ret) { |
| 5468 | mlog_errno(ret); |
| 5469 | goto out_commit; |
| 5470 | } |
| 5471 | |
Joel Becker | dbdcf6a | 2009-02-13 03:41:26 -0800 | [diff] [blame] | 5472 | ret = ocfs2_remove_extent(handle, &et, cpos, len, meta_ac, |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 5473 | &dealloc); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5474 | if (ret) { |
| 5475 | mlog_errno(ret); |
| 5476 | goto out_commit; |
| 5477 | } |
| 5478 | |
| 5479 | le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len); |
Joel Becker | ec20cec | 2010-03-19 14:13:52 -0700 | [diff] [blame] | 5480 | ocfs2_journal_dirty(handle, root_bh); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5481 | |
| 5482 | ret = ocfs2_truncate_log_append(osb, handle, blkno, len); |
| 5483 | if (ret) |
| 5484 | mlog_errno(ret); |
| 5485 | |
| 5486 | out_commit: |
| 5487 | ocfs2_commit_trans(osb, handle); |
| 5488 | out: |
| 5489 | ocfs2_schedule_truncate_log_flush(osb, 1); |
| 5490 | |
| 5491 | mutex_unlock(&tl_inode->i_mutex); |
| 5492 | |
| 5493 | if (meta_ac) |
| 5494 | ocfs2_free_alloc_context(meta_ac); |
| 5495 | |
| 5496 | ocfs2_run_deallocs(osb, &dealloc); |
| 5497 | |
| 5498 | return ret; |
| 5499 | } |
| 5500 | |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5501 | /* |
Tao Ma | 80bcaf3 | 2008-10-27 06:06:24 +0800 | [diff] [blame] | 5502 | * check whether the xattr bucket is filled up with the same hash value. |
| 5503 | * If we want to insert the xattr with the same hash, return -ENOSPC. |
| 5504 | * If we want to insert a xattr with different hash value, go ahead |
| 5505 | * and ocfs2_divide_xattr_bucket will handle this. |
| 5506 | */ |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5507 | static int ocfs2_check_xattr_bucket_collision(struct inode *inode, |
Tao Ma | 80bcaf3 | 2008-10-27 06:06:24 +0800 | [diff] [blame] | 5508 | struct ocfs2_xattr_bucket *bucket, |
| 5509 | const char *name) |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5510 | { |
Joel Becker | 3e63294 | 2008-10-24 17:04:49 -0700 | [diff] [blame] | 5511 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
Tao Ma | 80bcaf3 | 2008-10-27 06:06:24 +0800 | [diff] [blame] | 5512 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
| 5513 | |
| 5514 | if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash)) |
| 5515 | return 0; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5516 | |
| 5517 | if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash == |
| 5518 | xh->xh_entries[0].xe_name_hash) { |
| 5519 | mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, " |
| 5520 | "hash = %u\n", |
Joel Becker | 9c7759a | 2008-10-24 16:21:03 -0700 | [diff] [blame] | 5521 | (unsigned long long)bucket_blkno(bucket), |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5522 | le32_to_cpu(xh->xh_entries[0].xe_name_hash)); |
| 5523 | return -ENOSPC; |
| 5524 | } |
| 5525 | |
| 5526 | return 0; |
| 5527 | } |
| 5528 | |
Joel Becker | c5d95df | 2009-08-18 21:03:24 -0700 | [diff] [blame] | 5529 | /* |
| 5530 | * Try to set the entry in the current bucket. If we fail, the caller |
| 5531 | * will handle getting us another bucket. |
| 5532 | */ |
| 5533 | static int ocfs2_xattr_set_entry_bucket(struct inode *inode, |
| 5534 | struct ocfs2_xattr_info *xi, |
| 5535 | struct ocfs2_xattr_search *xs, |
| 5536 | struct ocfs2_xattr_set_ctxt *ctxt) |
| 5537 | { |
| 5538 | int ret; |
| 5539 | struct ocfs2_xa_loc loc; |
| 5540 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 5541 | trace_ocfs2_xattr_set_entry_bucket(xi->xi_name); |
Joel Becker | c5d95df | 2009-08-18 21:03:24 -0700 | [diff] [blame] | 5542 | |
| 5543 | ocfs2_init_xattr_bucket_xa_loc(&loc, xs->bucket, |
| 5544 | xs->not_found ? NULL : xs->here); |
| 5545 | ret = ocfs2_xa_set(&loc, xi, ctxt); |
| 5546 | if (!ret) { |
| 5547 | xs->here = loc.xl_entry; |
| 5548 | goto out; |
| 5549 | } |
| 5550 | if (ret != -ENOSPC) { |
| 5551 | mlog_errno(ret); |
| 5552 | goto out; |
| 5553 | } |
| 5554 | |
| 5555 | /* Ok, we need space. Let's try defragmenting the bucket. */ |
| 5556 | ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle, |
| 5557 | xs->bucket); |
| 5558 | if (ret) { |
| 5559 | mlog_errno(ret); |
| 5560 | goto out; |
| 5561 | } |
| 5562 | |
| 5563 | ret = ocfs2_xa_set(&loc, xi, ctxt); |
| 5564 | if (!ret) { |
| 5565 | xs->here = loc.xl_entry; |
| 5566 | goto out; |
| 5567 | } |
| 5568 | if (ret != -ENOSPC) |
| 5569 | mlog_errno(ret); |
| 5570 | |
| 5571 | |
| 5572 | out: |
Joel Becker | c5d95df | 2009-08-18 21:03:24 -0700 | [diff] [blame] | 5573 | return ret; |
| 5574 | } |
| 5575 | |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5576 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, |
| 5577 | struct ocfs2_xattr_info *xi, |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 5578 | struct ocfs2_xattr_search *xs, |
| 5579 | struct ocfs2_xattr_set_ctxt *ctxt) |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5580 | { |
Joel Becker | c5d95df | 2009-08-18 21:03:24 -0700 | [diff] [blame] | 5581 | int ret; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5582 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 5583 | trace_ocfs2_xattr_set_entry_index_block(xi->xi_name); |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5584 | |
Joel Becker | c5d95df | 2009-08-18 21:03:24 -0700 | [diff] [blame] | 5585 | ret = ocfs2_xattr_set_entry_bucket(inode, xi, xs, ctxt); |
| 5586 | if (!ret) |
| 5587 | goto out; |
| 5588 | if (ret != -ENOSPC) { |
| 5589 | mlog_errno(ret); |
| 5590 | goto out; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5591 | } |
| 5592 | |
Joel Becker | c5d95df | 2009-08-18 21:03:24 -0700 | [diff] [blame] | 5593 | /* Ack, need more space. Let's try to get another bucket! */ |
| 5594 | |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5595 | /* |
Joel Becker | c5d95df | 2009-08-18 21:03:24 -0700 | [diff] [blame] | 5596 | * We do not allow for overlapping ranges between buckets. And |
| 5597 | * the maximum number of collisions we will allow for then is |
| 5598 | * one bucket's worth, so check it here whether we need to |
| 5599 | * add a new bucket for the insert. |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5600 | */ |
Joel Becker | c5d95df | 2009-08-18 21:03:24 -0700 | [diff] [blame] | 5601 | ret = ocfs2_check_xattr_bucket_collision(inode, |
Joel Becker | 91f2033 | 2008-11-26 15:25:41 -0800 | [diff] [blame] | 5602 | xs->bucket, |
Joel Becker | c5d95df | 2009-08-18 21:03:24 -0700 | [diff] [blame] | 5603 | xi->xi_name); |
| 5604 | if (ret) { |
| 5605 | mlog_errno(ret); |
| 5606 | goto out; |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5607 | } |
| 5608 | |
Joel Becker | c5d95df | 2009-08-18 21:03:24 -0700 | [diff] [blame] | 5609 | ret = ocfs2_add_new_xattr_bucket(inode, |
| 5610 | xs->xattr_bh, |
| 5611 | xs->bucket, |
| 5612 | ctxt); |
| 5613 | if (ret) { |
| 5614 | mlog_errno(ret); |
| 5615 | goto out; |
| 5616 | } |
| 5617 | |
| 5618 | /* |
| 5619 | * ocfs2_add_new_xattr_bucket() will have updated |
| 5620 | * xs->bucket if it moved, but it will not have updated |
| 5621 | * any of the other search fields. Thus, we drop it and |
| 5622 | * re-search. Everything should be cached, so it'll be |
| 5623 | * quick. |
| 5624 | */ |
| 5625 | ocfs2_xattr_bucket_relse(xs->bucket); |
| 5626 | ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh, |
| 5627 | xi->xi_name_index, |
| 5628 | xi->xi_name, xs); |
| 5629 | if (ret && ret != -ENODATA) |
| 5630 | goto out; |
| 5631 | xs->not_found = ret; |
| 5632 | |
| 5633 | /* Ok, we have a new bucket, let's try again */ |
| 5634 | ret = ocfs2_xattr_set_entry_bucket(inode, xi, xs, ctxt); |
| 5635 | if (ret && (ret != -ENOSPC)) |
| 5636 | mlog_errno(ret); |
| 5637 | |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5638 | out: |
Tao Ma | 0122559 | 2008-08-18 17:38:53 +0800 | [diff] [blame] | 5639 | return ret; |
| 5640 | } |
Tao Ma | a394425 | 2008-08-18 17:38:54 +0800 | [diff] [blame] | 5641 | |
| 5642 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, |
| 5643 | struct ocfs2_xattr_bucket *bucket, |
| 5644 | void *para) |
| 5645 | { |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 5646 | int ret = 0, ref_credits; |
Joel Becker | 3e63294 | 2008-10-24 17:04:49 -0700 | [diff] [blame] | 5647 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
Tao Ma | a394425 | 2008-08-18 17:38:54 +0800 | [diff] [blame] | 5648 | u16 i; |
| 5649 | struct ocfs2_xattr_entry *xe; |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 5650 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 5651 | struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,}; |
Joel Becker | 548b0f2 | 2008-11-24 19:32:13 -0800 | [diff] [blame] | 5652 | int credits = ocfs2_remove_extent_credits(osb->sb) + |
| 5653 | ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 5654 | struct ocfs2_xattr_value_root *xv; |
| 5655 | struct ocfs2_rm_xattr_bucket_para *args = |
| 5656 | (struct ocfs2_rm_xattr_bucket_para *)para; |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 5657 | |
| 5658 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); |
Tao Ma | a394425 | 2008-08-18 17:38:54 +0800 | [diff] [blame] | 5659 | |
| 5660 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { |
| 5661 | xe = &xh->xh_entries[i]; |
| 5662 | if (ocfs2_xattr_is_local(xe)) |
| 5663 | continue; |
| 5664 | |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 5665 | ret = ocfs2_get_xattr_tree_value_root(inode->i_sb, bucket, |
| 5666 | i, &xv, NULL); |
| 5667 | |
| 5668 | ret = ocfs2_lock_xattr_remove_allocators(inode, xv, |
| 5669 | args->ref_ci, |
| 5670 | args->ref_root_bh, |
| 5671 | &ctxt.meta_ac, |
| 5672 | &ref_credits); |
| 5673 | |
| 5674 | ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits); |
Tao Ma | 88c3b06 | 2008-12-11 08:54:11 +0800 | [diff] [blame] | 5675 | if (IS_ERR(ctxt.handle)) { |
| 5676 | ret = PTR_ERR(ctxt.handle); |
| 5677 | mlog_errno(ret); |
| 5678 | break; |
| 5679 | } |
| 5680 | |
Joel Becker | 548b0f2 | 2008-11-24 19:32:13 -0800 | [diff] [blame] | 5681 | ret = ocfs2_xattr_bucket_value_truncate(inode, bucket, |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 5682 | i, 0, &ctxt); |
Tao Ma | 88c3b06 | 2008-12-11 08:54:11 +0800 | [diff] [blame] | 5683 | |
| 5684 | ocfs2_commit_trans(osb, ctxt.handle); |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 5685 | if (ctxt.meta_ac) { |
| 5686 | ocfs2_free_alloc_context(ctxt.meta_ac); |
| 5687 | ctxt.meta_ac = NULL; |
| 5688 | } |
Tao Ma | a394425 | 2008-08-18 17:38:54 +0800 | [diff] [blame] | 5689 | if (ret) { |
| 5690 | mlog_errno(ret); |
| 5691 | break; |
| 5692 | } |
| 5693 | } |
| 5694 | |
Tao Ma | ce9c5a5 | 2009-08-18 11:43:59 +0800 | [diff] [blame] | 5695 | if (ctxt.meta_ac) |
| 5696 | ocfs2_free_alloc_context(ctxt.meta_ac); |
Tao Ma | 78f30c3 | 2008-11-12 08:27:00 +0800 | [diff] [blame] | 5697 | ocfs2_schedule_truncate_log_flush(osb, 1); |
| 5698 | ocfs2_run_deallocs(osb, &ctxt.dealloc); |
Tao Ma | a394425 | 2008-08-18 17:38:54 +0800 | [diff] [blame] | 5699 | return ret; |
| 5700 | } |
| 5701 | |
Mark Fasheh | 99219ae | 2008-10-07 14:52:59 -0700 | [diff] [blame] | 5702 | /* |
Tao Ma | 492a8a3 | 2009-08-18 11:43:17 +0800 | [diff] [blame] | 5703 | * Whenever we modify a xattr value root in the bucket(e.g, CoW |
| 5704 | * or change the extent record flag), we need to recalculate |
| 5705 | * the metaecc for the whole bucket. So it is done here. |
| 5706 | * |
| 5707 | * Note: |
| 5708 | * We have to give the extra credits for the caller. |
| 5709 | */ |
| 5710 | static int ocfs2_xattr_bucket_post_refcount(struct inode *inode, |
| 5711 | handle_t *handle, |
| 5712 | void *para) |
| 5713 | { |
| 5714 | int ret; |
| 5715 | struct ocfs2_xattr_bucket *bucket = |
| 5716 | (struct ocfs2_xattr_bucket *)para; |
| 5717 | |
| 5718 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, |
| 5719 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 5720 | if (ret) { |
| 5721 | mlog_errno(ret); |
| 5722 | return ret; |
| 5723 | } |
| 5724 | |
| 5725 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); |
| 5726 | |
| 5727 | return 0; |
| 5728 | } |
| 5729 | |
| 5730 | /* |
| 5731 | * Special action we need if the xattr value is refcounted. |
| 5732 | * |
| 5733 | * 1. If the xattr is refcounted, lock the tree. |
| 5734 | * 2. CoW the xattr if we are setting the new value and the value |
| 5735 | * will be stored outside. |
| 5736 | * 3. In other case, decrease_refcount will work for us, so just |
| 5737 | * lock the refcount tree, calculate the meta and credits is OK. |
| 5738 | * |
| 5739 | * We have to do CoW before ocfs2_init_xattr_set_ctxt since |
| 5740 | * currently CoW is a completed transaction, while this function |
| 5741 | * will also lock the allocators and let us deadlock. So we will |
| 5742 | * CoW the whole xattr value. |
| 5743 | */ |
| 5744 | static int ocfs2_prepare_refcount_xattr(struct inode *inode, |
| 5745 | struct ocfs2_dinode *di, |
| 5746 | struct ocfs2_xattr_info *xi, |
| 5747 | struct ocfs2_xattr_search *xis, |
| 5748 | struct ocfs2_xattr_search *xbs, |
| 5749 | struct ocfs2_refcount_tree **ref_tree, |
| 5750 | int *meta_add, |
| 5751 | int *credits) |
| 5752 | { |
| 5753 | int ret = 0; |
| 5754 | struct ocfs2_xattr_block *xb; |
| 5755 | struct ocfs2_xattr_entry *xe; |
| 5756 | char *base; |
| 5757 | u32 p_cluster, num_clusters; |
| 5758 | unsigned int ext_flags; |
| 5759 | int name_offset, name_len; |
| 5760 | struct ocfs2_xattr_value_buf vb; |
| 5761 | struct ocfs2_xattr_bucket *bucket = NULL; |
| 5762 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 5763 | struct ocfs2_post_refcount refcount; |
| 5764 | struct ocfs2_post_refcount *p = NULL; |
| 5765 | struct buffer_head *ref_root_bh = NULL; |
| 5766 | |
| 5767 | if (!xis->not_found) { |
| 5768 | xe = xis->here; |
| 5769 | name_offset = le16_to_cpu(xe->xe_name_offset); |
| 5770 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); |
| 5771 | base = xis->base; |
| 5772 | vb.vb_bh = xis->inode_bh; |
| 5773 | vb.vb_access = ocfs2_journal_access_di; |
| 5774 | } else { |
| 5775 | int i, block_off = 0; |
| 5776 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; |
| 5777 | xe = xbs->here; |
| 5778 | name_offset = le16_to_cpu(xe->xe_name_offset); |
| 5779 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); |
| 5780 | i = xbs->here - xbs->header->xh_entries; |
| 5781 | |
| 5782 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { |
Tao Ma | fd68a89 | 2009-08-18 11:43:21 +0800 | [diff] [blame] | 5783 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
Tao Ma | 492a8a3 | 2009-08-18 11:43:17 +0800 | [diff] [blame] | 5784 | bucket_xh(xbs->bucket), |
| 5785 | i, &block_off, |
| 5786 | &name_offset); |
| 5787 | if (ret) { |
| 5788 | mlog_errno(ret); |
| 5789 | goto out; |
| 5790 | } |
| 5791 | base = bucket_block(xbs->bucket, block_off); |
| 5792 | vb.vb_bh = xbs->bucket->bu_bhs[block_off]; |
| 5793 | vb.vb_access = ocfs2_journal_access; |
| 5794 | |
| 5795 | if (ocfs2_meta_ecc(osb)) { |
| 5796 | /*create parameters for ocfs2_post_refcount. */ |
| 5797 | bucket = xbs->bucket; |
| 5798 | refcount.credits = bucket->bu_blocks; |
| 5799 | refcount.para = bucket; |
| 5800 | refcount.func = |
| 5801 | ocfs2_xattr_bucket_post_refcount; |
| 5802 | p = &refcount; |
| 5803 | } |
| 5804 | } else { |
| 5805 | base = xbs->base; |
| 5806 | vb.vb_bh = xbs->xattr_bh; |
| 5807 | vb.vb_access = ocfs2_journal_access_xb; |
| 5808 | } |
| 5809 | } |
| 5810 | |
| 5811 | if (ocfs2_xattr_is_local(xe)) |
| 5812 | goto out; |
| 5813 | |
| 5814 | vb.vb_xv = (struct ocfs2_xattr_value_root *) |
| 5815 | (base + name_offset + name_len); |
| 5816 | |
| 5817 | ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster, |
| 5818 | &num_clusters, &vb.vb_xv->xr_list, |
| 5819 | &ext_flags); |
| 5820 | if (ret) { |
| 5821 | mlog_errno(ret); |
| 5822 | goto out; |
| 5823 | } |
| 5824 | |
| 5825 | /* |
| 5826 | * We just need to check the 1st extent record, since we always |
| 5827 | * CoW the whole xattr. So there shouldn't be a xattr with |
| 5828 | * some REFCOUNT extent recs after the 1st one. |
| 5829 | */ |
| 5830 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) |
| 5831 | goto out; |
| 5832 | |
| 5833 | ret = ocfs2_lock_refcount_tree(osb, le64_to_cpu(di->i_refcount_loc), |
| 5834 | 1, ref_tree, &ref_root_bh); |
| 5835 | if (ret) { |
| 5836 | mlog_errno(ret); |
| 5837 | goto out; |
| 5838 | } |
| 5839 | |
| 5840 | /* |
| 5841 | * If we are deleting the xattr or the new size will be stored inside, |
| 5842 | * cool, leave it there, the xattr truncate process will remove them |
| 5843 | * for us(it still needs the refcount tree lock and the meta, credits). |
| 5844 | * And the worse case is that every cluster truncate will split the |
| 5845 | * refcount tree, and make the original extent become 3. So we will need |
| 5846 | * 2 * cluster more extent recs at most. |
| 5847 | */ |
Joel Becker | 6b240ff | 2009-08-14 18:02:52 -0700 | [diff] [blame] | 5848 | if (!xi->xi_value || xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE) { |
Tao Ma | 492a8a3 | 2009-08-18 11:43:17 +0800 | [diff] [blame] | 5849 | |
| 5850 | ret = ocfs2_refcounted_xattr_delete_need(inode, |
| 5851 | &(*ref_tree)->rf_ci, |
| 5852 | ref_root_bh, vb.vb_xv, |
| 5853 | meta_add, credits); |
| 5854 | if (ret) |
| 5855 | mlog_errno(ret); |
| 5856 | goto out; |
| 5857 | } |
| 5858 | |
| 5859 | ret = ocfs2_refcount_cow_xattr(inode, di, &vb, |
| 5860 | *ref_tree, ref_root_bh, 0, |
| 5861 | le32_to_cpu(vb.vb_xv->xr_clusters), p); |
| 5862 | if (ret) |
| 5863 | mlog_errno(ret); |
| 5864 | |
| 5865 | out: |
| 5866 | brelse(ref_root_bh); |
| 5867 | return ret; |
| 5868 | } |
| 5869 | |
| 5870 | /* |
Tao Ma | 0129241 | 2009-09-21 13:04:19 +0800 | [diff] [blame] | 5871 | * Add the REFCOUNTED flags for all the extent rec in ocfs2_xattr_value_root. |
| 5872 | * The physical clusters will be added to refcount tree. |
| 5873 | */ |
| 5874 | static int ocfs2_xattr_value_attach_refcount(struct inode *inode, |
| 5875 | struct ocfs2_xattr_value_root *xv, |
| 5876 | struct ocfs2_extent_tree *value_et, |
| 5877 | struct ocfs2_caching_info *ref_ci, |
| 5878 | struct buffer_head *ref_root_bh, |
| 5879 | struct ocfs2_cached_dealloc_ctxt *dealloc, |
| 5880 | struct ocfs2_post_refcount *refcount) |
| 5881 | { |
| 5882 | int ret = 0; |
| 5883 | u32 clusters = le32_to_cpu(xv->xr_clusters); |
| 5884 | u32 cpos, p_cluster, num_clusters; |
| 5885 | struct ocfs2_extent_list *el = &xv->xr_list; |
| 5886 | unsigned int ext_flags; |
| 5887 | |
| 5888 | cpos = 0; |
| 5889 | while (cpos < clusters) { |
| 5890 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, |
| 5891 | &num_clusters, el, &ext_flags); |
| 5892 | |
| 5893 | cpos += num_clusters; |
| 5894 | if ((ext_flags & OCFS2_EXT_REFCOUNTED)) |
| 5895 | continue; |
| 5896 | |
| 5897 | BUG_ON(!p_cluster); |
| 5898 | |
| 5899 | ret = ocfs2_add_refcount_flag(inode, value_et, |
| 5900 | ref_ci, ref_root_bh, |
| 5901 | cpos - num_clusters, |
| 5902 | p_cluster, num_clusters, |
| 5903 | dealloc, refcount); |
| 5904 | if (ret) { |
| 5905 | mlog_errno(ret); |
| 5906 | break; |
| 5907 | } |
| 5908 | } |
| 5909 | |
| 5910 | return ret; |
| 5911 | } |
| 5912 | |
| 5913 | /* |
| 5914 | * Given a normal ocfs2_xattr_header, refcount all the entries which |
| 5915 | * have value stored outside. |
| 5916 | * Used for xattrs stored in inode and ocfs2_xattr_block. |
| 5917 | */ |
| 5918 | static int ocfs2_xattr_attach_refcount_normal(struct inode *inode, |
| 5919 | struct ocfs2_xattr_value_buf *vb, |
| 5920 | struct ocfs2_xattr_header *header, |
| 5921 | struct ocfs2_caching_info *ref_ci, |
| 5922 | struct buffer_head *ref_root_bh, |
| 5923 | struct ocfs2_cached_dealloc_ctxt *dealloc) |
| 5924 | { |
| 5925 | |
| 5926 | struct ocfs2_xattr_entry *xe; |
| 5927 | struct ocfs2_xattr_value_root *xv; |
| 5928 | struct ocfs2_extent_tree et; |
| 5929 | int i, ret = 0; |
| 5930 | |
| 5931 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { |
| 5932 | xe = &header->xh_entries[i]; |
| 5933 | |
| 5934 | if (ocfs2_xattr_is_local(xe)) |
| 5935 | continue; |
| 5936 | |
| 5937 | xv = (struct ocfs2_xattr_value_root *)((void *)header + |
| 5938 | le16_to_cpu(xe->xe_name_offset) + |
| 5939 | OCFS2_XATTR_SIZE(xe->xe_name_len)); |
| 5940 | |
| 5941 | vb->vb_xv = xv; |
| 5942 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); |
| 5943 | |
| 5944 | ret = ocfs2_xattr_value_attach_refcount(inode, xv, &et, |
| 5945 | ref_ci, ref_root_bh, |
| 5946 | dealloc, NULL); |
| 5947 | if (ret) { |
| 5948 | mlog_errno(ret); |
| 5949 | break; |
| 5950 | } |
| 5951 | } |
| 5952 | |
| 5953 | return ret; |
| 5954 | } |
| 5955 | |
| 5956 | static int ocfs2_xattr_inline_attach_refcount(struct inode *inode, |
| 5957 | struct buffer_head *fe_bh, |
| 5958 | struct ocfs2_caching_info *ref_ci, |
| 5959 | struct buffer_head *ref_root_bh, |
| 5960 | struct ocfs2_cached_dealloc_ctxt *dealloc) |
| 5961 | { |
| 5962 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)fe_bh->b_data; |
| 5963 | struct ocfs2_xattr_header *header = (struct ocfs2_xattr_header *) |
| 5964 | (fe_bh->b_data + inode->i_sb->s_blocksize - |
| 5965 | le16_to_cpu(di->i_xattr_inline_size)); |
| 5966 | struct ocfs2_xattr_value_buf vb = { |
| 5967 | .vb_bh = fe_bh, |
| 5968 | .vb_access = ocfs2_journal_access_di, |
| 5969 | }; |
| 5970 | |
| 5971 | return ocfs2_xattr_attach_refcount_normal(inode, &vb, header, |
| 5972 | ref_ci, ref_root_bh, dealloc); |
| 5973 | } |
| 5974 | |
| 5975 | struct ocfs2_xattr_tree_value_refcount_para { |
| 5976 | struct ocfs2_caching_info *ref_ci; |
| 5977 | struct buffer_head *ref_root_bh; |
| 5978 | struct ocfs2_cached_dealloc_ctxt *dealloc; |
| 5979 | }; |
| 5980 | |
| 5981 | static int ocfs2_get_xattr_tree_value_root(struct super_block *sb, |
| 5982 | struct ocfs2_xattr_bucket *bucket, |
| 5983 | int offset, |
| 5984 | struct ocfs2_xattr_value_root **xv, |
| 5985 | struct buffer_head **bh) |
| 5986 | { |
| 5987 | int ret, block_off, name_offset; |
| 5988 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
| 5989 | struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset]; |
| 5990 | void *base; |
| 5991 | |
| 5992 | ret = ocfs2_xattr_bucket_get_name_value(sb, |
| 5993 | bucket_xh(bucket), |
| 5994 | offset, |
| 5995 | &block_off, |
| 5996 | &name_offset); |
| 5997 | if (ret) { |
| 5998 | mlog_errno(ret); |
| 5999 | goto out; |
| 6000 | } |
| 6001 | |
| 6002 | base = bucket_block(bucket, block_off); |
| 6003 | |
| 6004 | *xv = (struct ocfs2_xattr_value_root *)(base + name_offset + |
| 6005 | OCFS2_XATTR_SIZE(xe->xe_name_len)); |
| 6006 | |
| 6007 | if (bh) |
| 6008 | *bh = bucket->bu_bhs[block_off]; |
| 6009 | out: |
| 6010 | return ret; |
| 6011 | } |
| 6012 | |
| 6013 | /* |
| 6014 | * For a given xattr bucket, refcount all the entries which |
| 6015 | * have value stored outside. |
| 6016 | */ |
| 6017 | static int ocfs2_xattr_bucket_value_refcount(struct inode *inode, |
| 6018 | struct ocfs2_xattr_bucket *bucket, |
| 6019 | void *para) |
| 6020 | { |
| 6021 | int i, ret = 0; |
| 6022 | struct ocfs2_extent_tree et; |
| 6023 | struct ocfs2_xattr_tree_value_refcount_para *ref = |
| 6024 | (struct ocfs2_xattr_tree_value_refcount_para *)para; |
| 6025 | struct ocfs2_xattr_header *xh = |
| 6026 | (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data; |
| 6027 | struct ocfs2_xattr_entry *xe; |
| 6028 | struct ocfs2_xattr_value_buf vb = { |
| 6029 | .vb_access = ocfs2_journal_access, |
| 6030 | }; |
| 6031 | struct ocfs2_post_refcount refcount = { |
| 6032 | .credits = bucket->bu_blocks, |
| 6033 | .para = bucket, |
| 6034 | .func = ocfs2_xattr_bucket_post_refcount, |
| 6035 | }; |
| 6036 | struct ocfs2_post_refcount *p = NULL; |
| 6037 | |
| 6038 | /* We only need post_refcount if we support metaecc. */ |
| 6039 | if (ocfs2_meta_ecc(OCFS2_SB(inode->i_sb))) |
| 6040 | p = &refcount; |
| 6041 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 6042 | trace_ocfs2_xattr_bucket_value_refcount( |
| 6043 | (unsigned long long)bucket_blkno(bucket), |
| 6044 | le16_to_cpu(xh->xh_count)); |
Tao Ma | 0129241 | 2009-09-21 13:04:19 +0800 | [diff] [blame] | 6045 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { |
| 6046 | xe = &xh->xh_entries[i]; |
| 6047 | |
| 6048 | if (ocfs2_xattr_is_local(xe)) |
| 6049 | continue; |
| 6050 | |
| 6051 | ret = ocfs2_get_xattr_tree_value_root(inode->i_sb, bucket, i, |
| 6052 | &vb.vb_xv, &vb.vb_bh); |
| 6053 | if (ret) { |
| 6054 | mlog_errno(ret); |
| 6055 | break; |
| 6056 | } |
| 6057 | |
| 6058 | ocfs2_init_xattr_value_extent_tree(&et, |
| 6059 | INODE_CACHE(inode), &vb); |
| 6060 | |
| 6061 | ret = ocfs2_xattr_value_attach_refcount(inode, vb.vb_xv, |
| 6062 | &et, ref->ref_ci, |
| 6063 | ref->ref_root_bh, |
| 6064 | ref->dealloc, p); |
| 6065 | if (ret) { |
| 6066 | mlog_errno(ret); |
| 6067 | break; |
| 6068 | } |
| 6069 | } |
| 6070 | |
| 6071 | return ret; |
| 6072 | |
| 6073 | } |
| 6074 | |
| 6075 | static int ocfs2_refcount_xattr_tree_rec(struct inode *inode, |
| 6076 | struct buffer_head *root_bh, |
| 6077 | u64 blkno, u32 cpos, u32 len, void *para) |
| 6078 | { |
| 6079 | return ocfs2_iterate_xattr_buckets(inode, blkno, len, |
| 6080 | ocfs2_xattr_bucket_value_refcount, |
| 6081 | para); |
| 6082 | } |
| 6083 | |
| 6084 | static int ocfs2_xattr_block_attach_refcount(struct inode *inode, |
| 6085 | struct buffer_head *blk_bh, |
| 6086 | struct ocfs2_caching_info *ref_ci, |
| 6087 | struct buffer_head *ref_root_bh, |
| 6088 | struct ocfs2_cached_dealloc_ctxt *dealloc) |
| 6089 | { |
| 6090 | int ret = 0; |
| 6091 | struct ocfs2_xattr_block *xb = |
| 6092 | (struct ocfs2_xattr_block *)blk_bh->b_data; |
| 6093 | |
| 6094 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
| 6095 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; |
| 6096 | struct ocfs2_xattr_value_buf vb = { |
| 6097 | .vb_bh = blk_bh, |
| 6098 | .vb_access = ocfs2_journal_access_xb, |
| 6099 | }; |
| 6100 | |
| 6101 | ret = ocfs2_xattr_attach_refcount_normal(inode, &vb, header, |
| 6102 | ref_ci, ref_root_bh, |
| 6103 | dealloc); |
| 6104 | } else { |
| 6105 | struct ocfs2_xattr_tree_value_refcount_para para = { |
| 6106 | .ref_ci = ref_ci, |
| 6107 | .ref_root_bh = ref_root_bh, |
| 6108 | .dealloc = dealloc, |
| 6109 | }; |
| 6110 | |
| 6111 | ret = ocfs2_iterate_xattr_index_block(inode, blk_bh, |
| 6112 | ocfs2_refcount_xattr_tree_rec, |
| 6113 | ¶); |
| 6114 | } |
| 6115 | |
| 6116 | return ret; |
| 6117 | } |
| 6118 | |
| 6119 | int ocfs2_xattr_attach_refcount_tree(struct inode *inode, |
| 6120 | struct buffer_head *fe_bh, |
| 6121 | struct ocfs2_caching_info *ref_ci, |
| 6122 | struct buffer_head *ref_root_bh, |
| 6123 | struct ocfs2_cached_dealloc_ctxt *dealloc) |
| 6124 | { |
| 6125 | int ret = 0; |
| 6126 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 6127 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)fe_bh->b_data; |
| 6128 | struct buffer_head *blk_bh = NULL; |
| 6129 | |
| 6130 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { |
| 6131 | ret = ocfs2_xattr_inline_attach_refcount(inode, fe_bh, |
| 6132 | ref_ci, ref_root_bh, |
| 6133 | dealloc); |
| 6134 | if (ret) { |
| 6135 | mlog_errno(ret); |
| 6136 | goto out; |
| 6137 | } |
| 6138 | } |
| 6139 | |
| 6140 | if (!di->i_xattr_loc) |
| 6141 | goto out; |
| 6142 | |
| 6143 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
| 6144 | &blk_bh); |
| 6145 | if (ret < 0) { |
| 6146 | mlog_errno(ret); |
| 6147 | goto out; |
| 6148 | } |
| 6149 | |
| 6150 | ret = ocfs2_xattr_block_attach_refcount(inode, blk_bh, ref_ci, |
| 6151 | ref_root_bh, dealloc); |
| 6152 | if (ret) |
| 6153 | mlog_errno(ret); |
| 6154 | |
| 6155 | brelse(blk_bh); |
| 6156 | out: |
| 6157 | |
| 6158 | return ret; |
| 6159 | } |
| 6160 | |
Tao Ma | 0fe9b66 | 2009-08-18 11:47:56 +0800 | [diff] [blame] | 6161 | typedef int (should_xattr_reflinked)(struct ocfs2_xattr_entry *xe); |
Tao Ma | 0129241 | 2009-09-21 13:04:19 +0800 | [diff] [blame] | 6162 | /* |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6163 | * Store the information we need in xattr reflink. |
| 6164 | * old_bh and new_bh are inode bh for the old and new inode. |
| 6165 | */ |
| 6166 | struct ocfs2_xattr_reflink { |
| 6167 | struct inode *old_inode; |
| 6168 | struct inode *new_inode; |
| 6169 | struct buffer_head *old_bh; |
| 6170 | struct buffer_head *new_bh; |
| 6171 | struct ocfs2_caching_info *ref_ci; |
| 6172 | struct buffer_head *ref_root_bh; |
| 6173 | struct ocfs2_cached_dealloc_ctxt *dealloc; |
Tao Ma | 0fe9b66 | 2009-08-18 11:47:56 +0800 | [diff] [blame] | 6174 | should_xattr_reflinked *xattr_reflinked; |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6175 | }; |
| 6176 | |
| 6177 | /* |
| 6178 | * Given a xattr header and xe offset, |
| 6179 | * return the proper xv and the corresponding bh. |
| 6180 | * xattr in inode, block and xattr tree have different implementaions. |
| 6181 | */ |
| 6182 | typedef int (get_xattr_value_root)(struct super_block *sb, |
| 6183 | struct buffer_head *bh, |
| 6184 | struct ocfs2_xattr_header *xh, |
| 6185 | int offset, |
| 6186 | struct ocfs2_xattr_value_root **xv, |
| 6187 | struct buffer_head **ret_bh, |
| 6188 | void *para); |
| 6189 | |
| 6190 | /* |
| 6191 | * Calculate all the xattr value root metadata stored in this xattr header and |
| 6192 | * credits we need if we create them from the scratch. |
| 6193 | * We use get_xattr_value_root so that all types of xattr container can use it. |
| 6194 | */ |
| 6195 | static int ocfs2_value_metas_in_xattr_header(struct super_block *sb, |
| 6196 | struct buffer_head *bh, |
| 6197 | struct ocfs2_xattr_header *xh, |
| 6198 | int *metas, int *credits, |
| 6199 | int *num_recs, |
| 6200 | get_xattr_value_root *func, |
| 6201 | void *para) |
| 6202 | { |
| 6203 | int i, ret = 0; |
| 6204 | struct ocfs2_xattr_value_root *xv; |
| 6205 | struct ocfs2_xattr_entry *xe; |
| 6206 | |
| 6207 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { |
| 6208 | xe = &xh->xh_entries[i]; |
| 6209 | if (ocfs2_xattr_is_local(xe)) |
| 6210 | continue; |
| 6211 | |
| 6212 | ret = func(sb, bh, xh, i, &xv, NULL, para); |
| 6213 | if (ret) { |
| 6214 | mlog_errno(ret); |
| 6215 | break; |
| 6216 | } |
| 6217 | |
| 6218 | *metas += le16_to_cpu(xv->xr_list.l_tree_depth) * |
| 6219 | le16_to_cpu(xv->xr_list.l_next_free_rec); |
| 6220 | |
| 6221 | *credits += ocfs2_calc_extend_credits(sb, |
| 6222 | &def_xv.xv.xr_list, |
| 6223 | le32_to_cpu(xv->xr_clusters)); |
| 6224 | |
| 6225 | /* |
| 6226 | * If the value is a tree with depth > 1, We don't go deep |
| 6227 | * to the extent block, so just calculate a maximum record num. |
| 6228 | */ |
| 6229 | if (!xv->xr_list.l_tree_depth) |
Tao Ma | 8ff6af8 | 2009-12-23 14:31:15 +0800 | [diff] [blame] | 6230 | *num_recs += le16_to_cpu(xv->xr_list.l_next_free_rec); |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6231 | else |
| 6232 | *num_recs += ocfs2_clusters_for_bytes(sb, |
| 6233 | XATTR_SIZE_MAX); |
| 6234 | } |
| 6235 | |
| 6236 | return ret; |
| 6237 | } |
| 6238 | |
| 6239 | /* Used by xattr inode and block to return the right xv and buffer_head. */ |
| 6240 | static int ocfs2_get_xattr_value_root(struct super_block *sb, |
| 6241 | struct buffer_head *bh, |
| 6242 | struct ocfs2_xattr_header *xh, |
| 6243 | int offset, |
| 6244 | struct ocfs2_xattr_value_root **xv, |
| 6245 | struct buffer_head **ret_bh, |
| 6246 | void *para) |
| 6247 | { |
| 6248 | struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset]; |
| 6249 | |
| 6250 | *xv = (struct ocfs2_xattr_value_root *)((void *)xh + |
| 6251 | le16_to_cpu(xe->xe_name_offset) + |
| 6252 | OCFS2_XATTR_SIZE(xe->xe_name_len)); |
| 6253 | |
| 6254 | if (ret_bh) |
| 6255 | *ret_bh = bh; |
| 6256 | |
| 6257 | return 0; |
| 6258 | } |
| 6259 | |
| 6260 | /* |
| 6261 | * Lock the meta_ac and caculate how much credits we need for reflink xattrs. |
| 6262 | * It is only used for inline xattr and xattr block. |
| 6263 | */ |
| 6264 | static int ocfs2_reflink_lock_xattr_allocators(struct ocfs2_super *osb, |
| 6265 | struct ocfs2_xattr_header *xh, |
| 6266 | struct buffer_head *ref_root_bh, |
| 6267 | int *credits, |
| 6268 | struct ocfs2_alloc_context **meta_ac) |
| 6269 | { |
| 6270 | int ret, meta_add = 0, num_recs = 0; |
| 6271 | struct ocfs2_refcount_block *rb = |
| 6272 | (struct ocfs2_refcount_block *)ref_root_bh->b_data; |
| 6273 | |
| 6274 | *credits = 0; |
| 6275 | |
| 6276 | ret = ocfs2_value_metas_in_xattr_header(osb->sb, NULL, xh, |
| 6277 | &meta_add, credits, &num_recs, |
| 6278 | ocfs2_get_xattr_value_root, |
| 6279 | NULL); |
| 6280 | if (ret) { |
| 6281 | mlog_errno(ret); |
| 6282 | goto out; |
| 6283 | } |
| 6284 | |
| 6285 | /* |
| 6286 | * We need to add/modify num_recs in refcount tree, so just calculate |
| 6287 | * an approximate number we need for refcount tree change. |
| 6288 | * Sometimes we need to split the tree, and after split, half recs |
| 6289 | * will be moved to the new block, and a new block can only provide |
| 6290 | * half number of recs. So we multiple new blocks by 2. |
| 6291 | */ |
| 6292 | num_recs = num_recs / ocfs2_refcount_recs_per_rb(osb->sb) * 2; |
| 6293 | meta_add += num_recs; |
| 6294 | *credits += num_recs + num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS; |
| 6295 | if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL) |
| 6296 | *credits += le16_to_cpu(rb->rf_list.l_tree_depth) * |
| 6297 | le16_to_cpu(rb->rf_list.l_next_free_rec) + 1; |
| 6298 | else |
| 6299 | *credits += 1; |
| 6300 | |
| 6301 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, meta_ac); |
| 6302 | if (ret) |
| 6303 | mlog_errno(ret); |
| 6304 | |
| 6305 | out: |
| 6306 | return ret; |
| 6307 | } |
| 6308 | |
| 6309 | /* |
| 6310 | * Given a xattr header, reflink all the xattrs in this container. |
| 6311 | * It can be used for inode, block and bucket. |
| 6312 | * |
| 6313 | * NOTE: |
| 6314 | * Before we call this function, the caller has memcpy the xattr in |
| 6315 | * old_xh to the new_xh. |
Tao Ma | 0fe9b66 | 2009-08-18 11:47:56 +0800 | [diff] [blame] | 6316 | * |
| 6317 | * If args.xattr_reflinked is set, call it to decide whether the xe should |
| 6318 | * be reflinked or not. If not, remove it from the new xattr header. |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6319 | */ |
| 6320 | static int ocfs2_reflink_xattr_header(handle_t *handle, |
| 6321 | struct ocfs2_xattr_reflink *args, |
| 6322 | struct buffer_head *old_bh, |
| 6323 | struct ocfs2_xattr_header *xh, |
| 6324 | struct buffer_head *new_bh, |
| 6325 | struct ocfs2_xattr_header *new_xh, |
| 6326 | struct ocfs2_xattr_value_buf *vb, |
| 6327 | struct ocfs2_alloc_context *meta_ac, |
| 6328 | get_xattr_value_root *func, |
| 6329 | void *para) |
| 6330 | { |
Tao Ma | 0fe9b66 | 2009-08-18 11:47:56 +0800 | [diff] [blame] | 6331 | int ret = 0, i, j; |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6332 | struct super_block *sb = args->old_inode->i_sb; |
| 6333 | struct buffer_head *value_bh; |
Tao Ma | 0fe9b66 | 2009-08-18 11:47:56 +0800 | [diff] [blame] | 6334 | struct ocfs2_xattr_entry *xe, *last; |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6335 | struct ocfs2_xattr_value_root *xv, *new_xv; |
| 6336 | struct ocfs2_extent_tree data_et; |
| 6337 | u32 clusters, cpos, p_cluster, num_clusters; |
| 6338 | unsigned int ext_flags = 0; |
| 6339 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 6340 | trace_ocfs2_reflink_xattr_header((unsigned long long)old_bh->b_blocknr, |
| 6341 | le16_to_cpu(xh->xh_count)); |
Tao Ma | 0fe9b66 | 2009-08-18 11:47:56 +0800 | [diff] [blame] | 6342 | |
| 6343 | last = &new_xh->xh_entries[le16_to_cpu(new_xh->xh_count)]; |
| 6344 | for (i = 0, j = 0; i < le16_to_cpu(xh->xh_count); i++, j++) { |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6345 | xe = &xh->xh_entries[i]; |
| 6346 | |
Tao Ma | 0fe9b66 | 2009-08-18 11:47:56 +0800 | [diff] [blame] | 6347 | if (args->xattr_reflinked && !args->xattr_reflinked(xe)) { |
| 6348 | xe = &new_xh->xh_entries[j]; |
| 6349 | |
| 6350 | le16_add_cpu(&new_xh->xh_count, -1); |
| 6351 | if (new_xh->xh_count) { |
| 6352 | memmove(xe, xe + 1, |
| 6353 | (void *)last - (void *)xe); |
| 6354 | memset(last, 0, |
| 6355 | sizeof(struct ocfs2_xattr_entry)); |
| 6356 | } |
| 6357 | |
| 6358 | /* |
| 6359 | * We don't want j to increase in the next round since |
| 6360 | * it is already moved ahead. |
| 6361 | */ |
| 6362 | j--; |
| 6363 | continue; |
| 6364 | } |
| 6365 | |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6366 | if (ocfs2_xattr_is_local(xe)) |
| 6367 | continue; |
| 6368 | |
| 6369 | ret = func(sb, old_bh, xh, i, &xv, NULL, para); |
| 6370 | if (ret) { |
| 6371 | mlog_errno(ret); |
| 6372 | break; |
| 6373 | } |
| 6374 | |
Tao Ma | 0fe9b66 | 2009-08-18 11:47:56 +0800 | [diff] [blame] | 6375 | ret = func(sb, new_bh, new_xh, j, &new_xv, &value_bh, para); |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6376 | if (ret) { |
| 6377 | mlog_errno(ret); |
| 6378 | break; |
| 6379 | } |
| 6380 | |
| 6381 | /* |
| 6382 | * For the xattr which has l_tree_depth = 0, all the extent |
| 6383 | * recs have already be copied to the new xh with the |
| 6384 | * propriate OCFS2_EXT_REFCOUNTED flag we just need to |
| 6385 | * increase the refount count int the refcount tree. |
| 6386 | * |
| 6387 | * For the xattr which has l_tree_depth > 0, we need |
| 6388 | * to initialize it to the empty default value root, |
| 6389 | * and then insert the extents one by one. |
| 6390 | */ |
| 6391 | if (xv->xr_list.l_tree_depth) { |
| 6392 | memcpy(new_xv, &def_xv, sizeof(def_xv)); |
| 6393 | vb->vb_xv = new_xv; |
| 6394 | vb->vb_bh = value_bh; |
| 6395 | ocfs2_init_xattr_value_extent_tree(&data_et, |
| 6396 | INODE_CACHE(args->new_inode), vb); |
| 6397 | } |
| 6398 | |
| 6399 | clusters = le32_to_cpu(xv->xr_clusters); |
| 6400 | cpos = 0; |
| 6401 | while (cpos < clusters) { |
| 6402 | ret = ocfs2_xattr_get_clusters(args->old_inode, |
| 6403 | cpos, |
| 6404 | &p_cluster, |
| 6405 | &num_clusters, |
| 6406 | &xv->xr_list, |
| 6407 | &ext_flags); |
| 6408 | if (ret) { |
| 6409 | mlog_errno(ret); |
| 6410 | goto out; |
| 6411 | } |
| 6412 | |
| 6413 | BUG_ON(!p_cluster); |
| 6414 | |
| 6415 | if (xv->xr_list.l_tree_depth) { |
| 6416 | ret = ocfs2_insert_extent(handle, |
| 6417 | &data_et, cpos, |
| 6418 | ocfs2_clusters_to_blocks( |
| 6419 | args->old_inode->i_sb, |
| 6420 | p_cluster), |
| 6421 | num_clusters, ext_flags, |
| 6422 | meta_ac); |
| 6423 | if (ret) { |
| 6424 | mlog_errno(ret); |
| 6425 | goto out; |
| 6426 | } |
| 6427 | } |
| 6428 | |
| 6429 | ret = ocfs2_increase_refcount(handle, args->ref_ci, |
| 6430 | args->ref_root_bh, |
| 6431 | p_cluster, num_clusters, |
| 6432 | meta_ac, args->dealloc); |
| 6433 | if (ret) { |
| 6434 | mlog_errno(ret); |
| 6435 | goto out; |
| 6436 | } |
| 6437 | |
| 6438 | cpos += num_clusters; |
| 6439 | } |
| 6440 | } |
| 6441 | |
| 6442 | out: |
| 6443 | return ret; |
| 6444 | } |
| 6445 | |
| 6446 | static int ocfs2_reflink_xattr_inline(struct ocfs2_xattr_reflink *args) |
| 6447 | { |
| 6448 | int ret = 0, credits = 0; |
| 6449 | handle_t *handle; |
| 6450 | struct ocfs2_super *osb = OCFS2_SB(args->old_inode->i_sb); |
| 6451 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)args->old_bh->b_data; |
| 6452 | int inline_size = le16_to_cpu(di->i_xattr_inline_size); |
| 6453 | int header_off = osb->sb->s_blocksize - inline_size; |
| 6454 | struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *) |
| 6455 | (args->old_bh->b_data + header_off); |
| 6456 | struct ocfs2_xattr_header *new_xh = (struct ocfs2_xattr_header *) |
| 6457 | (args->new_bh->b_data + header_off); |
| 6458 | struct ocfs2_alloc_context *meta_ac = NULL; |
| 6459 | struct ocfs2_inode_info *new_oi; |
| 6460 | struct ocfs2_dinode *new_di; |
| 6461 | struct ocfs2_xattr_value_buf vb = { |
| 6462 | .vb_bh = args->new_bh, |
| 6463 | .vb_access = ocfs2_journal_access_di, |
| 6464 | }; |
| 6465 | |
| 6466 | ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh, |
| 6467 | &credits, &meta_ac); |
| 6468 | if (ret) { |
| 6469 | mlog_errno(ret); |
| 6470 | goto out; |
| 6471 | } |
| 6472 | |
| 6473 | handle = ocfs2_start_trans(osb, credits); |
| 6474 | if (IS_ERR(handle)) { |
| 6475 | ret = PTR_ERR(handle); |
| 6476 | mlog_errno(ret); |
| 6477 | goto out; |
| 6478 | } |
| 6479 | |
| 6480 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(args->new_inode), |
| 6481 | args->new_bh, OCFS2_JOURNAL_ACCESS_WRITE); |
| 6482 | if (ret) { |
| 6483 | mlog_errno(ret); |
| 6484 | goto out_commit; |
| 6485 | } |
| 6486 | |
| 6487 | memcpy(args->new_bh->b_data + header_off, |
| 6488 | args->old_bh->b_data + header_off, inline_size); |
| 6489 | |
| 6490 | new_di = (struct ocfs2_dinode *)args->new_bh->b_data; |
| 6491 | new_di->i_xattr_inline_size = cpu_to_le16(inline_size); |
| 6492 | |
| 6493 | ret = ocfs2_reflink_xattr_header(handle, args, args->old_bh, xh, |
| 6494 | args->new_bh, new_xh, &vb, meta_ac, |
| 6495 | ocfs2_get_xattr_value_root, NULL); |
| 6496 | if (ret) { |
| 6497 | mlog_errno(ret); |
| 6498 | goto out_commit; |
| 6499 | } |
| 6500 | |
| 6501 | new_oi = OCFS2_I(args->new_inode); |
| 6502 | spin_lock(&new_oi->ip_lock); |
| 6503 | new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL | OCFS2_INLINE_XATTR_FL; |
| 6504 | new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features); |
| 6505 | spin_unlock(&new_oi->ip_lock); |
| 6506 | |
| 6507 | ocfs2_journal_dirty(handle, args->new_bh); |
| 6508 | |
| 6509 | out_commit: |
| 6510 | ocfs2_commit_trans(osb, handle); |
| 6511 | |
| 6512 | out: |
| 6513 | if (meta_ac) |
| 6514 | ocfs2_free_alloc_context(meta_ac); |
| 6515 | return ret; |
| 6516 | } |
| 6517 | |
| 6518 | static int ocfs2_create_empty_xattr_block(struct inode *inode, |
| 6519 | struct buffer_head *fe_bh, |
| 6520 | struct buffer_head **ret_bh, |
| 6521 | int indexed) |
| 6522 | { |
| 6523 | int ret; |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6524 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Tao Ma | b231796 | 2010-03-19 15:04:24 +0800 | [diff] [blame] | 6525 | struct ocfs2_xattr_set_ctxt ctxt; |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6526 | |
Tao Ma | b231796 | 2010-03-19 15:04:24 +0800 | [diff] [blame] | 6527 | memset(&ctxt, 0, sizeof(ctxt)); |
| 6528 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &ctxt.meta_ac); |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6529 | if (ret < 0) { |
| 6530 | mlog_errno(ret); |
| 6531 | return ret; |
| 6532 | } |
| 6533 | |
Joel Becker | d398154 | 2009-08-19 02:13:50 -0700 | [diff] [blame] | 6534 | ctxt.handle = ocfs2_start_trans(osb, OCFS2_XATTR_BLOCK_CREATE_CREDITS); |
| 6535 | if (IS_ERR(ctxt.handle)) { |
| 6536 | ret = PTR_ERR(ctxt.handle); |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6537 | mlog_errno(ret); |
| 6538 | goto out; |
| 6539 | } |
| 6540 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 6541 | trace_ocfs2_create_empty_xattr_block( |
| 6542 | (unsigned long long)fe_bh->b_blocknr, indexed); |
Joel Becker | d398154 | 2009-08-19 02:13:50 -0700 | [diff] [blame] | 6543 | ret = ocfs2_create_xattr_block(inode, fe_bh, &ctxt, indexed, |
| 6544 | ret_bh); |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6545 | if (ret) |
| 6546 | mlog_errno(ret); |
| 6547 | |
Joel Becker | d398154 | 2009-08-19 02:13:50 -0700 | [diff] [blame] | 6548 | ocfs2_commit_trans(osb, ctxt.handle); |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6549 | out: |
Tao Ma | b231796 | 2010-03-19 15:04:24 +0800 | [diff] [blame] | 6550 | ocfs2_free_alloc_context(ctxt.meta_ac); |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6551 | return ret; |
| 6552 | } |
| 6553 | |
| 6554 | static int ocfs2_reflink_xattr_block(struct ocfs2_xattr_reflink *args, |
| 6555 | struct buffer_head *blk_bh, |
| 6556 | struct buffer_head *new_blk_bh) |
| 6557 | { |
| 6558 | int ret = 0, credits = 0; |
| 6559 | handle_t *handle; |
| 6560 | struct ocfs2_inode_info *new_oi = OCFS2_I(args->new_inode); |
| 6561 | struct ocfs2_dinode *new_di; |
| 6562 | struct ocfs2_super *osb = OCFS2_SB(args->new_inode->i_sb); |
| 6563 | int header_off = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); |
| 6564 | struct ocfs2_xattr_block *xb = |
| 6565 | (struct ocfs2_xattr_block *)blk_bh->b_data; |
| 6566 | struct ocfs2_xattr_header *xh = &xb->xb_attrs.xb_header; |
| 6567 | struct ocfs2_xattr_block *new_xb = |
| 6568 | (struct ocfs2_xattr_block *)new_blk_bh->b_data; |
| 6569 | struct ocfs2_xattr_header *new_xh = &new_xb->xb_attrs.xb_header; |
| 6570 | struct ocfs2_alloc_context *meta_ac; |
| 6571 | struct ocfs2_xattr_value_buf vb = { |
| 6572 | .vb_bh = new_blk_bh, |
| 6573 | .vb_access = ocfs2_journal_access_xb, |
| 6574 | }; |
| 6575 | |
| 6576 | ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh, |
| 6577 | &credits, &meta_ac); |
| 6578 | if (ret) { |
| 6579 | mlog_errno(ret); |
| 6580 | return ret; |
| 6581 | } |
| 6582 | |
| 6583 | /* One more credits in case we need to add xattr flags in new inode. */ |
| 6584 | handle = ocfs2_start_trans(osb, credits + 1); |
| 6585 | if (IS_ERR(handle)) { |
| 6586 | ret = PTR_ERR(handle); |
| 6587 | mlog_errno(ret); |
| 6588 | goto out; |
| 6589 | } |
| 6590 | |
| 6591 | if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) { |
| 6592 | ret = ocfs2_journal_access_di(handle, |
| 6593 | INODE_CACHE(args->new_inode), |
| 6594 | args->new_bh, |
| 6595 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 6596 | if (ret) { |
| 6597 | mlog_errno(ret); |
| 6598 | goto out_commit; |
| 6599 | } |
| 6600 | } |
| 6601 | |
| 6602 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(args->new_inode), |
| 6603 | new_blk_bh, OCFS2_JOURNAL_ACCESS_WRITE); |
| 6604 | if (ret) { |
| 6605 | mlog_errno(ret); |
| 6606 | goto out_commit; |
| 6607 | } |
| 6608 | |
| 6609 | memcpy(new_blk_bh->b_data + header_off, blk_bh->b_data + header_off, |
| 6610 | osb->sb->s_blocksize - header_off); |
| 6611 | |
| 6612 | ret = ocfs2_reflink_xattr_header(handle, args, blk_bh, xh, |
| 6613 | new_blk_bh, new_xh, &vb, meta_ac, |
| 6614 | ocfs2_get_xattr_value_root, NULL); |
| 6615 | if (ret) { |
| 6616 | mlog_errno(ret); |
| 6617 | goto out_commit; |
| 6618 | } |
| 6619 | |
| 6620 | ocfs2_journal_dirty(handle, new_blk_bh); |
| 6621 | |
| 6622 | if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) { |
| 6623 | new_di = (struct ocfs2_dinode *)args->new_bh->b_data; |
| 6624 | spin_lock(&new_oi->ip_lock); |
| 6625 | new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL; |
| 6626 | new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features); |
| 6627 | spin_unlock(&new_oi->ip_lock); |
| 6628 | |
| 6629 | ocfs2_journal_dirty(handle, args->new_bh); |
| 6630 | } |
| 6631 | |
| 6632 | out_commit: |
| 6633 | ocfs2_commit_trans(osb, handle); |
| 6634 | |
| 6635 | out: |
| 6636 | ocfs2_free_alloc_context(meta_ac); |
| 6637 | return ret; |
| 6638 | } |
| 6639 | |
| 6640 | struct ocfs2_reflink_xattr_tree_args { |
| 6641 | struct ocfs2_xattr_reflink *reflink; |
| 6642 | struct buffer_head *old_blk_bh; |
| 6643 | struct buffer_head *new_blk_bh; |
| 6644 | struct ocfs2_xattr_bucket *old_bucket; |
| 6645 | struct ocfs2_xattr_bucket *new_bucket; |
| 6646 | }; |
| 6647 | |
| 6648 | /* |
| 6649 | * NOTE: |
| 6650 | * We have to handle the case that both old bucket and new bucket |
| 6651 | * will call this function to get the right ret_bh. |
| 6652 | * So The caller must give us the right bh. |
| 6653 | */ |
| 6654 | static int ocfs2_get_reflink_xattr_value_root(struct super_block *sb, |
| 6655 | struct buffer_head *bh, |
| 6656 | struct ocfs2_xattr_header *xh, |
| 6657 | int offset, |
| 6658 | struct ocfs2_xattr_value_root **xv, |
| 6659 | struct buffer_head **ret_bh, |
| 6660 | void *para) |
| 6661 | { |
| 6662 | struct ocfs2_reflink_xattr_tree_args *args = |
| 6663 | (struct ocfs2_reflink_xattr_tree_args *)para; |
| 6664 | struct ocfs2_xattr_bucket *bucket; |
| 6665 | |
| 6666 | if (bh == args->old_bucket->bu_bhs[0]) |
| 6667 | bucket = args->old_bucket; |
| 6668 | else |
| 6669 | bucket = args->new_bucket; |
| 6670 | |
| 6671 | return ocfs2_get_xattr_tree_value_root(sb, bucket, offset, |
| 6672 | xv, ret_bh); |
| 6673 | } |
| 6674 | |
| 6675 | struct ocfs2_value_tree_metas { |
| 6676 | int num_metas; |
| 6677 | int credits; |
| 6678 | int num_recs; |
| 6679 | }; |
| 6680 | |
| 6681 | static int ocfs2_value_tree_metas_in_bucket(struct super_block *sb, |
| 6682 | struct buffer_head *bh, |
| 6683 | struct ocfs2_xattr_header *xh, |
| 6684 | int offset, |
| 6685 | struct ocfs2_xattr_value_root **xv, |
| 6686 | struct buffer_head **ret_bh, |
| 6687 | void *para) |
| 6688 | { |
| 6689 | struct ocfs2_xattr_bucket *bucket = |
| 6690 | (struct ocfs2_xattr_bucket *)para; |
| 6691 | |
| 6692 | return ocfs2_get_xattr_tree_value_root(sb, bucket, offset, |
| 6693 | xv, ret_bh); |
| 6694 | } |
| 6695 | |
| 6696 | static int ocfs2_calc_value_tree_metas(struct inode *inode, |
| 6697 | struct ocfs2_xattr_bucket *bucket, |
| 6698 | void *para) |
| 6699 | { |
| 6700 | struct ocfs2_value_tree_metas *metas = |
| 6701 | (struct ocfs2_value_tree_metas *)para; |
| 6702 | struct ocfs2_xattr_header *xh = |
| 6703 | (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data; |
| 6704 | |
| 6705 | /* Add the credits for this bucket first. */ |
| 6706 | metas->credits += bucket->bu_blocks; |
| 6707 | return ocfs2_value_metas_in_xattr_header(inode->i_sb, bucket->bu_bhs[0], |
| 6708 | xh, &metas->num_metas, |
| 6709 | &metas->credits, &metas->num_recs, |
| 6710 | ocfs2_value_tree_metas_in_bucket, |
| 6711 | bucket); |
| 6712 | } |
| 6713 | |
| 6714 | /* |
| 6715 | * Given a xattr extent rec starting from blkno and having len clusters, |
| 6716 | * iterate all the buckets calculate how much metadata we need for reflinking |
| 6717 | * all the ocfs2_xattr_value_root and lock the allocators accordingly. |
| 6718 | */ |
| 6719 | static int ocfs2_lock_reflink_xattr_rec_allocators( |
| 6720 | struct ocfs2_reflink_xattr_tree_args *args, |
| 6721 | struct ocfs2_extent_tree *xt_et, |
| 6722 | u64 blkno, u32 len, int *credits, |
| 6723 | struct ocfs2_alloc_context **meta_ac, |
| 6724 | struct ocfs2_alloc_context **data_ac) |
| 6725 | { |
| 6726 | int ret, num_free_extents; |
| 6727 | struct ocfs2_value_tree_metas metas; |
| 6728 | struct ocfs2_super *osb = OCFS2_SB(args->reflink->old_inode->i_sb); |
| 6729 | struct ocfs2_refcount_block *rb; |
| 6730 | |
| 6731 | memset(&metas, 0, sizeof(metas)); |
| 6732 | |
| 6733 | ret = ocfs2_iterate_xattr_buckets(args->reflink->old_inode, blkno, len, |
| 6734 | ocfs2_calc_value_tree_metas, &metas); |
| 6735 | if (ret) { |
| 6736 | mlog_errno(ret); |
| 6737 | goto out; |
| 6738 | } |
| 6739 | |
| 6740 | *credits = metas.credits; |
| 6741 | |
| 6742 | /* |
| 6743 | * Calculate we need for refcount tree change. |
| 6744 | * |
| 6745 | * We need to add/modify num_recs in refcount tree, so just calculate |
| 6746 | * an approximate number we need for refcount tree change. |
| 6747 | * Sometimes we need to split the tree, and after split, half recs |
| 6748 | * will be moved to the new block, and a new block can only provide |
| 6749 | * half number of recs. So we multiple new blocks by 2. |
| 6750 | * In the end, we have to add credits for modifying the already |
| 6751 | * existed refcount block. |
| 6752 | */ |
| 6753 | rb = (struct ocfs2_refcount_block *)args->reflink->ref_root_bh->b_data; |
| 6754 | metas.num_recs = |
| 6755 | (metas.num_recs + ocfs2_refcount_recs_per_rb(osb->sb) - 1) / |
| 6756 | ocfs2_refcount_recs_per_rb(osb->sb) * 2; |
| 6757 | metas.num_metas += metas.num_recs; |
| 6758 | *credits += metas.num_recs + |
| 6759 | metas.num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS; |
| 6760 | if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL) |
| 6761 | *credits += le16_to_cpu(rb->rf_list.l_tree_depth) * |
| 6762 | le16_to_cpu(rb->rf_list.l_next_free_rec) + 1; |
| 6763 | else |
| 6764 | *credits += 1; |
| 6765 | |
| 6766 | /* count in the xattr tree change. */ |
| 6767 | num_free_extents = ocfs2_num_free_extents(osb, xt_et); |
| 6768 | if (num_free_extents < 0) { |
| 6769 | ret = num_free_extents; |
| 6770 | mlog_errno(ret); |
| 6771 | goto out; |
| 6772 | } |
| 6773 | |
| 6774 | if (num_free_extents < len) |
| 6775 | metas.num_metas += ocfs2_extend_meta_needed(xt_et->et_root_el); |
| 6776 | |
| 6777 | *credits += ocfs2_calc_extend_credits(osb->sb, |
| 6778 | xt_et->et_root_el, len); |
| 6779 | |
| 6780 | if (metas.num_metas) { |
| 6781 | ret = ocfs2_reserve_new_metadata_blocks(osb, metas.num_metas, |
| 6782 | meta_ac); |
| 6783 | if (ret) { |
| 6784 | mlog_errno(ret); |
| 6785 | goto out; |
| 6786 | } |
| 6787 | } |
| 6788 | |
| 6789 | if (len) { |
| 6790 | ret = ocfs2_reserve_clusters(osb, len, data_ac); |
| 6791 | if (ret) |
| 6792 | mlog_errno(ret); |
| 6793 | } |
| 6794 | out: |
| 6795 | if (ret) { |
| 6796 | if (*meta_ac) { |
| 6797 | ocfs2_free_alloc_context(*meta_ac); |
| 6798 | meta_ac = NULL; |
| 6799 | } |
| 6800 | } |
| 6801 | |
| 6802 | return ret; |
| 6803 | } |
| 6804 | |
Tao Ma | 121a39b | 2010-07-09 14:53:12 +0800 | [diff] [blame] | 6805 | static int ocfs2_reflink_xattr_bucket(handle_t *handle, |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6806 | u64 blkno, u64 new_blkno, u32 clusters, |
Tao Ma | 121a39b | 2010-07-09 14:53:12 +0800 | [diff] [blame] | 6807 | u32 *cpos, int num_buckets, |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6808 | struct ocfs2_alloc_context *meta_ac, |
| 6809 | struct ocfs2_alloc_context *data_ac, |
| 6810 | struct ocfs2_reflink_xattr_tree_args *args) |
| 6811 | { |
| 6812 | int i, j, ret = 0; |
| 6813 | struct super_block *sb = args->reflink->old_inode->i_sb; |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6814 | int bpb = args->old_bucket->bu_blocks; |
| 6815 | struct ocfs2_xattr_value_buf vb = { |
| 6816 | .vb_access = ocfs2_journal_access, |
| 6817 | }; |
| 6818 | |
| 6819 | for (i = 0; i < num_buckets; i++, blkno += bpb, new_blkno += bpb) { |
| 6820 | ret = ocfs2_read_xattr_bucket(args->old_bucket, blkno); |
| 6821 | if (ret) { |
| 6822 | mlog_errno(ret); |
| 6823 | break; |
| 6824 | } |
| 6825 | |
| 6826 | ret = ocfs2_init_xattr_bucket(args->new_bucket, new_blkno); |
| 6827 | if (ret) { |
| 6828 | mlog_errno(ret); |
| 6829 | break; |
| 6830 | } |
| 6831 | |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6832 | ret = ocfs2_xattr_bucket_journal_access(handle, |
| 6833 | args->new_bucket, |
| 6834 | OCFS2_JOURNAL_ACCESS_CREATE); |
| 6835 | if (ret) { |
| 6836 | mlog_errno(ret); |
| 6837 | break; |
| 6838 | } |
| 6839 | |
| 6840 | for (j = 0; j < bpb; j++) |
| 6841 | memcpy(bucket_block(args->new_bucket, j), |
| 6842 | bucket_block(args->old_bucket, j), |
| 6843 | sb->s_blocksize); |
| 6844 | |
Tao Ma | 121a39b | 2010-07-09 14:53:12 +0800 | [diff] [blame] | 6845 | /* |
| 6846 | * Record the start cpos so that we can use it to initialize |
| 6847 | * our xattr tree we also set the xh_num_bucket for the new |
| 6848 | * bucket. |
| 6849 | */ |
| 6850 | if (i == 0) { |
| 6851 | *cpos = le32_to_cpu(bucket_xh(args->new_bucket)-> |
| 6852 | xh_entries[0].xe_name_hash); |
| 6853 | bucket_xh(args->new_bucket)->xh_num_buckets = |
| 6854 | cpu_to_le16(num_buckets); |
| 6855 | } |
| 6856 | |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6857 | ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket); |
| 6858 | |
| 6859 | ret = ocfs2_reflink_xattr_header(handle, args->reflink, |
| 6860 | args->old_bucket->bu_bhs[0], |
| 6861 | bucket_xh(args->old_bucket), |
| 6862 | args->new_bucket->bu_bhs[0], |
| 6863 | bucket_xh(args->new_bucket), |
| 6864 | &vb, meta_ac, |
| 6865 | ocfs2_get_reflink_xattr_value_root, |
| 6866 | args); |
| 6867 | if (ret) { |
| 6868 | mlog_errno(ret); |
| 6869 | break; |
| 6870 | } |
| 6871 | |
| 6872 | /* |
| 6873 | * Re-access and dirty the bucket to calculate metaecc. |
| 6874 | * Because we may extend the transaction in reflink_xattr_header |
| 6875 | * which will let the already accessed block gone. |
| 6876 | */ |
| 6877 | ret = ocfs2_xattr_bucket_journal_access(handle, |
| 6878 | args->new_bucket, |
| 6879 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 6880 | if (ret) { |
| 6881 | mlog_errno(ret); |
| 6882 | break; |
| 6883 | } |
| 6884 | |
| 6885 | ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket); |
Tao Ma | 121a39b | 2010-07-09 14:53:12 +0800 | [diff] [blame] | 6886 | |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6887 | ocfs2_xattr_bucket_relse(args->old_bucket); |
| 6888 | ocfs2_xattr_bucket_relse(args->new_bucket); |
| 6889 | } |
| 6890 | |
| 6891 | ocfs2_xattr_bucket_relse(args->old_bucket); |
| 6892 | ocfs2_xattr_bucket_relse(args->new_bucket); |
| 6893 | return ret; |
| 6894 | } |
Tao Ma | 121a39b | 2010-07-09 14:53:12 +0800 | [diff] [blame] | 6895 | |
| 6896 | static int ocfs2_reflink_xattr_buckets(handle_t *handle, |
| 6897 | struct inode *inode, |
| 6898 | struct ocfs2_reflink_xattr_tree_args *args, |
| 6899 | struct ocfs2_extent_tree *et, |
| 6900 | struct ocfs2_alloc_context *meta_ac, |
| 6901 | struct ocfs2_alloc_context *data_ac, |
| 6902 | u64 blkno, u32 cpos, u32 len) |
| 6903 | { |
| 6904 | int ret, first_inserted = 0; |
| 6905 | u32 p_cluster, num_clusters, reflink_cpos = 0; |
| 6906 | u64 new_blkno; |
| 6907 | unsigned int num_buckets, reflink_buckets; |
| 6908 | unsigned int bpc = |
| 6909 | ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); |
| 6910 | |
| 6911 | ret = ocfs2_read_xattr_bucket(args->old_bucket, blkno); |
| 6912 | if (ret) { |
| 6913 | mlog_errno(ret); |
| 6914 | goto out; |
| 6915 | } |
| 6916 | num_buckets = le16_to_cpu(bucket_xh(args->old_bucket)->xh_num_buckets); |
| 6917 | ocfs2_xattr_bucket_relse(args->old_bucket); |
| 6918 | |
| 6919 | while (len && num_buckets) { |
| 6920 | ret = ocfs2_claim_clusters(handle, data_ac, |
| 6921 | 1, &p_cluster, &num_clusters); |
| 6922 | if (ret) { |
| 6923 | mlog_errno(ret); |
| 6924 | goto out; |
| 6925 | } |
| 6926 | |
| 6927 | new_blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); |
| 6928 | reflink_buckets = min(num_buckets, bpc * num_clusters); |
| 6929 | |
| 6930 | ret = ocfs2_reflink_xattr_bucket(handle, blkno, |
| 6931 | new_blkno, num_clusters, |
| 6932 | &reflink_cpos, reflink_buckets, |
| 6933 | meta_ac, data_ac, args); |
| 6934 | if (ret) { |
| 6935 | mlog_errno(ret); |
| 6936 | goto out; |
| 6937 | } |
| 6938 | |
| 6939 | /* |
| 6940 | * For the 1st allocated cluster, we make it use the same cpos |
| 6941 | * so that the xattr tree looks the same as the original one |
| 6942 | * in the most case. |
| 6943 | */ |
| 6944 | if (!first_inserted) { |
| 6945 | reflink_cpos = cpos; |
| 6946 | first_inserted = 1; |
| 6947 | } |
| 6948 | ret = ocfs2_insert_extent(handle, et, reflink_cpos, new_blkno, |
| 6949 | num_clusters, 0, meta_ac); |
| 6950 | if (ret) |
| 6951 | mlog_errno(ret); |
| 6952 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 6953 | trace_ocfs2_reflink_xattr_buckets((unsigned long long)new_blkno, |
| 6954 | num_clusters, reflink_cpos); |
Tao Ma | 121a39b | 2010-07-09 14:53:12 +0800 | [diff] [blame] | 6955 | |
| 6956 | len -= num_clusters; |
| 6957 | blkno += ocfs2_clusters_to_blocks(inode->i_sb, num_clusters); |
| 6958 | num_buckets -= reflink_buckets; |
| 6959 | } |
| 6960 | out: |
| 6961 | return ret; |
| 6962 | } |
| 6963 | |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6964 | /* |
| 6965 | * Create the same xattr extent record in the new inode's xattr tree. |
| 6966 | */ |
| 6967 | static int ocfs2_reflink_xattr_rec(struct inode *inode, |
| 6968 | struct buffer_head *root_bh, |
| 6969 | u64 blkno, |
| 6970 | u32 cpos, |
| 6971 | u32 len, |
| 6972 | void *para) |
| 6973 | { |
| 6974 | int ret, credits = 0; |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6975 | handle_t *handle; |
| 6976 | struct ocfs2_reflink_xattr_tree_args *args = |
| 6977 | (struct ocfs2_reflink_xattr_tree_args *)para; |
| 6978 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 6979 | struct ocfs2_alloc_context *meta_ac = NULL; |
| 6980 | struct ocfs2_alloc_context *data_ac = NULL; |
| 6981 | struct ocfs2_extent_tree et; |
| 6982 | |
Tao Ma | 402b418 | 2011-02-23 22:01:17 +0800 | [diff] [blame] | 6983 | trace_ocfs2_reflink_xattr_rec((unsigned long long)blkno, len); |
Tao Ma | 121a39b | 2010-07-09 14:53:12 +0800 | [diff] [blame] | 6984 | |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 6985 | ocfs2_init_xattr_tree_extent_tree(&et, |
| 6986 | INODE_CACHE(args->reflink->new_inode), |
| 6987 | args->new_blk_bh); |
| 6988 | |
| 6989 | ret = ocfs2_lock_reflink_xattr_rec_allocators(args, &et, blkno, |
| 6990 | len, &credits, |
| 6991 | &meta_ac, &data_ac); |
| 6992 | if (ret) { |
| 6993 | mlog_errno(ret); |
| 6994 | goto out; |
| 6995 | } |
| 6996 | |
| 6997 | handle = ocfs2_start_trans(osb, credits); |
| 6998 | if (IS_ERR(handle)) { |
| 6999 | ret = PTR_ERR(handle); |
| 7000 | mlog_errno(ret); |
| 7001 | goto out; |
| 7002 | } |
| 7003 | |
Tao Ma | 121a39b | 2010-07-09 14:53:12 +0800 | [diff] [blame] | 7004 | ret = ocfs2_reflink_xattr_buckets(handle, inode, args, &et, |
| 7005 | meta_ac, data_ac, |
| 7006 | blkno, cpos, len); |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 7007 | if (ret) |
| 7008 | mlog_errno(ret); |
| 7009 | |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 7010 | ocfs2_commit_trans(osb, handle); |
| 7011 | |
| 7012 | out: |
| 7013 | if (meta_ac) |
| 7014 | ocfs2_free_alloc_context(meta_ac); |
| 7015 | if (data_ac) |
| 7016 | ocfs2_free_alloc_context(data_ac); |
| 7017 | return ret; |
| 7018 | } |
| 7019 | |
| 7020 | /* |
| 7021 | * Create reflinked xattr buckets. |
| 7022 | * We will add bucket one by one, and refcount all the xattrs in the bucket |
| 7023 | * if they are stored outside. |
| 7024 | */ |
| 7025 | static int ocfs2_reflink_xattr_tree(struct ocfs2_xattr_reflink *args, |
| 7026 | struct buffer_head *blk_bh, |
| 7027 | struct buffer_head *new_blk_bh) |
| 7028 | { |
| 7029 | int ret; |
| 7030 | struct ocfs2_reflink_xattr_tree_args para; |
| 7031 | |
| 7032 | memset(¶, 0, sizeof(para)); |
| 7033 | para.reflink = args; |
| 7034 | para.old_blk_bh = blk_bh; |
| 7035 | para.new_blk_bh = new_blk_bh; |
| 7036 | |
| 7037 | para.old_bucket = ocfs2_xattr_bucket_new(args->old_inode); |
| 7038 | if (!para.old_bucket) { |
| 7039 | mlog_errno(-ENOMEM); |
| 7040 | return -ENOMEM; |
| 7041 | } |
| 7042 | |
| 7043 | para.new_bucket = ocfs2_xattr_bucket_new(args->new_inode); |
| 7044 | if (!para.new_bucket) { |
| 7045 | ret = -ENOMEM; |
| 7046 | mlog_errno(ret); |
| 7047 | goto out; |
| 7048 | } |
| 7049 | |
| 7050 | ret = ocfs2_iterate_xattr_index_block(args->old_inode, blk_bh, |
| 7051 | ocfs2_reflink_xattr_rec, |
| 7052 | ¶); |
| 7053 | if (ret) |
| 7054 | mlog_errno(ret); |
| 7055 | |
| 7056 | out: |
| 7057 | ocfs2_xattr_bucket_free(para.old_bucket); |
| 7058 | ocfs2_xattr_bucket_free(para.new_bucket); |
| 7059 | return ret; |
| 7060 | } |
| 7061 | |
| 7062 | static int ocfs2_reflink_xattr_in_block(struct ocfs2_xattr_reflink *args, |
| 7063 | struct buffer_head *blk_bh) |
| 7064 | { |
| 7065 | int ret, indexed = 0; |
| 7066 | struct buffer_head *new_blk_bh = NULL; |
| 7067 | struct ocfs2_xattr_block *xb = |
| 7068 | (struct ocfs2_xattr_block *)blk_bh->b_data; |
| 7069 | |
| 7070 | |
| 7071 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) |
| 7072 | indexed = 1; |
| 7073 | |
| 7074 | ret = ocfs2_create_empty_xattr_block(args->new_inode, args->new_bh, |
| 7075 | &new_blk_bh, indexed); |
| 7076 | if (ret) { |
| 7077 | mlog_errno(ret); |
| 7078 | goto out; |
| 7079 | } |
| 7080 | |
Jeff Liu | 2decd65 | 2010-10-12 11:18:18 +0800 | [diff] [blame] | 7081 | if (!indexed) |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 7082 | ret = ocfs2_reflink_xattr_block(args, blk_bh, new_blk_bh); |
| 7083 | else |
| 7084 | ret = ocfs2_reflink_xattr_tree(args, blk_bh, new_blk_bh); |
| 7085 | if (ret) |
| 7086 | mlog_errno(ret); |
| 7087 | |
| 7088 | out: |
| 7089 | brelse(new_blk_bh); |
| 7090 | return ret; |
| 7091 | } |
| 7092 | |
Tao Ma | 0fe9b66 | 2009-08-18 11:47:56 +0800 | [diff] [blame] | 7093 | static int ocfs2_reflink_xattr_no_security(struct ocfs2_xattr_entry *xe) |
| 7094 | { |
| 7095 | int type = ocfs2_xattr_get_type(xe); |
| 7096 | |
| 7097 | return type != OCFS2_XATTR_INDEX_SECURITY && |
| 7098 | type != OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS && |
| 7099 | type != OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT; |
| 7100 | } |
| 7101 | |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 7102 | int ocfs2_reflink_xattrs(struct inode *old_inode, |
| 7103 | struct buffer_head *old_bh, |
| 7104 | struct inode *new_inode, |
Tao Ma | 0fe9b66 | 2009-08-18 11:47:56 +0800 | [diff] [blame] | 7105 | struct buffer_head *new_bh, |
| 7106 | bool preserve_security) |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 7107 | { |
| 7108 | int ret; |
| 7109 | struct ocfs2_xattr_reflink args; |
| 7110 | struct ocfs2_inode_info *oi = OCFS2_I(old_inode); |
| 7111 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)old_bh->b_data; |
| 7112 | struct buffer_head *blk_bh = NULL; |
| 7113 | struct ocfs2_cached_dealloc_ctxt dealloc; |
| 7114 | struct ocfs2_refcount_tree *ref_tree; |
| 7115 | struct buffer_head *ref_root_bh = NULL; |
| 7116 | |
| 7117 | ret = ocfs2_lock_refcount_tree(OCFS2_SB(old_inode->i_sb), |
| 7118 | le64_to_cpu(di->i_refcount_loc), |
| 7119 | 1, &ref_tree, &ref_root_bh); |
| 7120 | if (ret) { |
| 7121 | mlog_errno(ret); |
| 7122 | goto out; |
| 7123 | } |
| 7124 | |
| 7125 | ocfs2_init_dealloc_ctxt(&dealloc); |
| 7126 | |
| 7127 | args.old_inode = old_inode; |
| 7128 | args.new_inode = new_inode; |
| 7129 | args.old_bh = old_bh; |
| 7130 | args.new_bh = new_bh; |
| 7131 | args.ref_ci = &ref_tree->rf_ci; |
| 7132 | args.ref_root_bh = ref_root_bh; |
| 7133 | args.dealloc = &dealloc; |
Tao Ma | 0fe9b66 | 2009-08-18 11:47:56 +0800 | [diff] [blame] | 7134 | if (preserve_security) |
| 7135 | args.xattr_reflinked = NULL; |
| 7136 | else |
| 7137 | args.xattr_reflinked = ocfs2_reflink_xattr_no_security; |
Tao Ma | 2999d12 | 2009-08-18 11:43:55 +0800 | [diff] [blame] | 7138 | |
| 7139 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { |
| 7140 | ret = ocfs2_reflink_xattr_inline(&args); |
| 7141 | if (ret) { |
| 7142 | mlog_errno(ret); |
| 7143 | goto out_unlock; |
| 7144 | } |
| 7145 | } |
| 7146 | |
| 7147 | if (!di->i_xattr_loc) |
| 7148 | goto out_unlock; |
| 7149 | |
| 7150 | ret = ocfs2_read_xattr_block(old_inode, le64_to_cpu(di->i_xattr_loc), |
| 7151 | &blk_bh); |
| 7152 | if (ret < 0) { |
| 7153 | mlog_errno(ret); |
| 7154 | goto out_unlock; |
| 7155 | } |
| 7156 | |
| 7157 | ret = ocfs2_reflink_xattr_in_block(&args, blk_bh); |
| 7158 | if (ret) |
| 7159 | mlog_errno(ret); |
| 7160 | |
| 7161 | brelse(blk_bh); |
| 7162 | |
| 7163 | out_unlock: |
| 7164 | ocfs2_unlock_refcount_tree(OCFS2_SB(old_inode->i_sb), |
| 7165 | ref_tree, 1); |
| 7166 | brelse(ref_root_bh); |
| 7167 | |
| 7168 | if (ocfs2_dealloc_has_cluster(&dealloc)) { |
| 7169 | ocfs2_schedule_truncate_log_flush(OCFS2_SB(old_inode->i_sb), 1); |
| 7170 | ocfs2_run_deallocs(OCFS2_SB(old_inode->i_sb), &dealloc); |
| 7171 | } |
| 7172 | |
| 7173 | out: |
| 7174 | return ret; |
| 7175 | } |
| 7176 | |
| 7177 | /* |
Tao Ma | 0fe9b66 | 2009-08-18 11:47:56 +0800 | [diff] [blame] | 7178 | * Initialize security and acl for a already created inode. |
| 7179 | * Used for reflink a non-preserve-security file. |
| 7180 | * |
| 7181 | * It uses common api like ocfs2_xattr_set, so the caller |
| 7182 | * must not hold any lock expect i_mutex. |
| 7183 | */ |
| 7184 | int ocfs2_init_security_and_acl(struct inode *dir, |
Eric Paris | 2a7dba3 | 2011-02-01 11:05:39 -0500 | [diff] [blame] | 7185 | struct inode *inode, |
| 7186 | const struct qstr *qstr) |
Tao Ma | 0fe9b66 | 2009-08-18 11:47:56 +0800 | [diff] [blame] | 7187 | { |
| 7188 | int ret = 0; |
| 7189 | struct buffer_head *dir_bh = NULL; |
| 7190 | struct ocfs2_security_xattr_info si = { |
| 7191 | .enable = 1, |
| 7192 | }; |
| 7193 | |
Eric Paris | 2a7dba3 | 2011-02-01 11:05:39 -0500 | [diff] [blame] | 7194 | ret = ocfs2_init_security_get(inode, dir, qstr, &si); |
Tao Ma | 0fe9b66 | 2009-08-18 11:47:56 +0800 | [diff] [blame] | 7195 | if (!ret) { |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 7196 | ret = ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, |
| 7197 | si.name, si.value, si.value_len, |
| 7198 | XATTR_CREATE); |
Tao Ma | 0fe9b66 | 2009-08-18 11:47:56 +0800 | [diff] [blame] | 7199 | if (ret) { |
| 7200 | mlog_errno(ret); |
| 7201 | goto leave; |
| 7202 | } |
| 7203 | } else if (ret != -EOPNOTSUPP) { |
| 7204 | mlog_errno(ret); |
| 7205 | goto leave; |
| 7206 | } |
| 7207 | |
| 7208 | ret = ocfs2_inode_lock(dir, &dir_bh, 0); |
| 7209 | if (ret) { |
| 7210 | mlog_errno(ret); |
| 7211 | goto leave; |
| 7212 | } |
| 7213 | |
| 7214 | ret = ocfs2_init_acl(NULL, inode, dir, NULL, dir_bh, NULL, NULL); |
| 7215 | if (ret) |
| 7216 | mlog_errno(ret); |
| 7217 | |
| 7218 | ocfs2_inode_unlock(dir, 0); |
| 7219 | brelse(dir_bh); |
| 7220 | leave: |
| 7221 | return ret; |
| 7222 | } |
| 7223 | /* |
Tiger Yang | 923f7f3 | 2008-11-14 11:16:27 +0800 | [diff] [blame] | 7224 | * 'security' attributes support |
| 7225 | */ |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 7226 | static size_t ocfs2_xattr_security_list(struct dentry *dentry, char *list, |
Tiger Yang | 923f7f3 | 2008-11-14 11:16:27 +0800 | [diff] [blame] | 7227 | size_t list_size, const char *name, |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 7228 | size_t name_len, int type) |
Tiger Yang | 923f7f3 | 2008-11-14 11:16:27 +0800 | [diff] [blame] | 7229 | { |
| 7230 | const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN; |
| 7231 | const size_t total_len = prefix_len + name_len + 1; |
| 7232 | |
| 7233 | if (list && total_len <= list_size) { |
| 7234 | memcpy(list, XATTR_SECURITY_PREFIX, prefix_len); |
| 7235 | memcpy(list + prefix_len, name, name_len); |
| 7236 | list[prefix_len + name_len] = '\0'; |
| 7237 | } |
| 7238 | return total_len; |
| 7239 | } |
| 7240 | |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 7241 | static int ocfs2_xattr_security_get(struct dentry *dentry, const char *name, |
| 7242 | void *buffer, size_t size, int type) |
Tiger Yang | 923f7f3 | 2008-11-14 11:16:27 +0800 | [diff] [blame] | 7243 | { |
| 7244 | if (strcmp(name, "") == 0) |
| 7245 | return -EINVAL; |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 7246 | return ocfs2_xattr_get(dentry->d_inode, OCFS2_XATTR_INDEX_SECURITY, |
| 7247 | name, buffer, size); |
Tiger Yang | 923f7f3 | 2008-11-14 11:16:27 +0800 | [diff] [blame] | 7248 | } |
| 7249 | |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 7250 | static int ocfs2_xattr_security_set(struct dentry *dentry, const char *name, |
| 7251 | const void *value, size_t size, int flags, int type) |
Tiger Yang | 923f7f3 | 2008-11-14 11:16:27 +0800 | [diff] [blame] | 7252 | { |
| 7253 | if (strcmp(name, "") == 0) |
| 7254 | return -EINVAL; |
| 7255 | |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 7256 | return ocfs2_xattr_set(dentry->d_inode, OCFS2_XATTR_INDEX_SECURITY, |
| 7257 | name, value, size, flags); |
Tiger Yang | 923f7f3 | 2008-11-14 11:16:27 +0800 | [diff] [blame] | 7258 | } |
| 7259 | |
Tiger Yang | 534eadd | 2008-11-14 11:16:41 +0800 | [diff] [blame] | 7260 | int ocfs2_init_security_get(struct inode *inode, |
| 7261 | struct inode *dir, |
Eric Paris | 2a7dba3 | 2011-02-01 11:05:39 -0500 | [diff] [blame] | 7262 | const struct qstr *qstr, |
Tiger Yang | 534eadd | 2008-11-14 11:16:41 +0800 | [diff] [blame] | 7263 | struct ocfs2_security_xattr_info *si) |
| 7264 | { |
Tiger Yang | 38d59ef | 2008-12-17 10:22:56 +0800 | [diff] [blame] | 7265 | /* check whether ocfs2 support feature xattr */ |
| 7266 | if (!ocfs2_supports_xattr(OCFS2_SB(dir->i_sb))) |
| 7267 | return -EOPNOTSUPP; |
Eric Paris | 2a7dba3 | 2011-02-01 11:05:39 -0500 | [diff] [blame] | 7268 | return security_inode_init_security(inode, dir, qstr, &si->name, |
| 7269 | &si->value, &si->value_len); |
Tiger Yang | 534eadd | 2008-11-14 11:16:41 +0800 | [diff] [blame] | 7270 | } |
| 7271 | |
| 7272 | int ocfs2_init_security_set(handle_t *handle, |
| 7273 | struct inode *inode, |
| 7274 | struct buffer_head *di_bh, |
| 7275 | struct ocfs2_security_xattr_info *si, |
| 7276 | struct ocfs2_alloc_context *xattr_ac, |
| 7277 | struct ocfs2_alloc_context *data_ac) |
| 7278 | { |
| 7279 | return ocfs2_xattr_set_handle(handle, inode, di_bh, |
| 7280 | OCFS2_XATTR_INDEX_SECURITY, |
| 7281 | si->name, si->value, si->value_len, 0, |
| 7282 | xattr_ac, data_ac); |
| 7283 | } |
| 7284 | |
Stephen Hemminger | 537d81c | 2010-05-13 17:53:22 -0700 | [diff] [blame] | 7285 | const struct xattr_handler ocfs2_xattr_security_handler = { |
Tiger Yang | 923f7f3 | 2008-11-14 11:16:27 +0800 | [diff] [blame] | 7286 | .prefix = XATTR_SECURITY_PREFIX, |
| 7287 | .list = ocfs2_xattr_security_list, |
| 7288 | .get = ocfs2_xattr_security_get, |
| 7289 | .set = ocfs2_xattr_security_set, |
| 7290 | }; |
| 7291 | |
| 7292 | /* |
Mark Fasheh | 99219ae | 2008-10-07 14:52:59 -0700 | [diff] [blame] | 7293 | * 'trusted' attributes support |
| 7294 | */ |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 7295 | static size_t ocfs2_xattr_trusted_list(struct dentry *dentry, char *list, |
Mark Fasheh | 99219ae | 2008-10-07 14:52:59 -0700 | [diff] [blame] | 7296 | size_t list_size, const char *name, |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 7297 | size_t name_len, int type) |
Mark Fasheh | 99219ae | 2008-10-07 14:52:59 -0700 | [diff] [blame] | 7298 | { |
Tiger Yang | ceb1eba | 2008-10-23 16:34:13 +0800 | [diff] [blame] | 7299 | const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN; |
Mark Fasheh | 99219ae | 2008-10-07 14:52:59 -0700 | [diff] [blame] | 7300 | const size_t total_len = prefix_len + name_len + 1; |
| 7301 | |
| 7302 | if (list && total_len <= list_size) { |
| 7303 | memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len); |
| 7304 | memcpy(list + prefix_len, name, name_len); |
| 7305 | list[prefix_len + name_len] = '\0'; |
| 7306 | } |
| 7307 | return total_len; |
| 7308 | } |
| 7309 | |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 7310 | static int ocfs2_xattr_trusted_get(struct dentry *dentry, const char *name, |
| 7311 | void *buffer, size_t size, int type) |
Mark Fasheh | 99219ae | 2008-10-07 14:52:59 -0700 | [diff] [blame] | 7312 | { |
| 7313 | if (strcmp(name, "") == 0) |
| 7314 | return -EINVAL; |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 7315 | return ocfs2_xattr_get(dentry->d_inode, OCFS2_XATTR_INDEX_TRUSTED, |
| 7316 | name, buffer, size); |
Mark Fasheh | 99219ae | 2008-10-07 14:52:59 -0700 | [diff] [blame] | 7317 | } |
| 7318 | |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 7319 | static int ocfs2_xattr_trusted_set(struct dentry *dentry, const char *name, |
| 7320 | const void *value, size_t size, int flags, int type) |
Mark Fasheh | 99219ae | 2008-10-07 14:52:59 -0700 | [diff] [blame] | 7321 | { |
| 7322 | if (strcmp(name, "") == 0) |
| 7323 | return -EINVAL; |
| 7324 | |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 7325 | return ocfs2_xattr_set(dentry->d_inode, OCFS2_XATTR_INDEX_TRUSTED, |
| 7326 | name, value, size, flags); |
Mark Fasheh | 99219ae | 2008-10-07 14:52:59 -0700 | [diff] [blame] | 7327 | } |
| 7328 | |
Stephen Hemminger | 537d81c | 2010-05-13 17:53:22 -0700 | [diff] [blame] | 7329 | const struct xattr_handler ocfs2_xattr_trusted_handler = { |
Mark Fasheh | 99219ae | 2008-10-07 14:52:59 -0700 | [diff] [blame] | 7330 | .prefix = XATTR_TRUSTED_PREFIX, |
| 7331 | .list = ocfs2_xattr_trusted_list, |
| 7332 | .get = ocfs2_xattr_trusted_get, |
| 7333 | .set = ocfs2_xattr_trusted_set, |
| 7334 | }; |
| 7335 | |
Mark Fasheh | 99219ae | 2008-10-07 14:52:59 -0700 | [diff] [blame] | 7336 | /* |
| 7337 | * 'user' attributes support |
| 7338 | */ |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 7339 | static size_t ocfs2_xattr_user_list(struct dentry *dentry, char *list, |
Mark Fasheh | 99219ae | 2008-10-07 14:52:59 -0700 | [diff] [blame] | 7340 | size_t list_size, const char *name, |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 7341 | size_t name_len, int type) |
Mark Fasheh | 99219ae | 2008-10-07 14:52:59 -0700 | [diff] [blame] | 7342 | { |
Tiger Yang | ceb1eba | 2008-10-23 16:34:13 +0800 | [diff] [blame] | 7343 | const size_t prefix_len = XATTR_USER_PREFIX_LEN; |
Mark Fasheh | 99219ae | 2008-10-07 14:52:59 -0700 | [diff] [blame] | 7344 | const size_t total_len = prefix_len + name_len + 1; |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 7345 | struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb); |
Mark Fasheh | 99219ae | 2008-10-07 14:52:59 -0700 | [diff] [blame] | 7346 | |
| 7347 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) |
| 7348 | return 0; |
| 7349 | |
| 7350 | if (list && total_len <= list_size) { |
| 7351 | memcpy(list, XATTR_USER_PREFIX, prefix_len); |
| 7352 | memcpy(list + prefix_len, name, name_len); |
| 7353 | list[prefix_len + name_len] = '\0'; |
| 7354 | } |
| 7355 | return total_len; |
| 7356 | } |
| 7357 | |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 7358 | static int ocfs2_xattr_user_get(struct dentry *dentry, const char *name, |
| 7359 | void *buffer, size_t size, int type) |
Mark Fasheh | 99219ae | 2008-10-07 14:52:59 -0700 | [diff] [blame] | 7360 | { |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 7361 | struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb); |
Mark Fasheh | 99219ae | 2008-10-07 14:52:59 -0700 | [diff] [blame] | 7362 | |
| 7363 | if (strcmp(name, "") == 0) |
| 7364 | return -EINVAL; |
| 7365 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) |
| 7366 | return -EOPNOTSUPP; |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 7367 | return ocfs2_xattr_get(dentry->d_inode, OCFS2_XATTR_INDEX_USER, name, |
Mark Fasheh | 99219ae | 2008-10-07 14:52:59 -0700 | [diff] [blame] | 7368 | buffer, size); |
| 7369 | } |
| 7370 | |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 7371 | static int ocfs2_xattr_user_set(struct dentry *dentry, const char *name, |
| 7372 | const void *value, size_t size, int flags, int type) |
Mark Fasheh | 99219ae | 2008-10-07 14:52:59 -0700 | [diff] [blame] | 7373 | { |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 7374 | struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb); |
Mark Fasheh | 99219ae | 2008-10-07 14:52:59 -0700 | [diff] [blame] | 7375 | |
| 7376 | if (strcmp(name, "") == 0) |
| 7377 | return -EINVAL; |
| 7378 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) |
| 7379 | return -EOPNOTSUPP; |
| 7380 | |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 7381 | return ocfs2_xattr_set(dentry->d_inode, OCFS2_XATTR_INDEX_USER, |
| 7382 | name, value, size, flags); |
Mark Fasheh | 99219ae | 2008-10-07 14:52:59 -0700 | [diff] [blame] | 7383 | } |
| 7384 | |
Stephen Hemminger | 537d81c | 2010-05-13 17:53:22 -0700 | [diff] [blame] | 7385 | const struct xattr_handler ocfs2_xattr_user_handler = { |
Mark Fasheh | 99219ae | 2008-10-07 14:52:59 -0700 | [diff] [blame] | 7386 | .prefix = XATTR_USER_PREFIX, |
| 7387 | .list = ocfs2_xattr_user_list, |
| 7388 | .get = ocfs2_xattr_user_get, |
| 7389 | .set = ocfs2_xattr_user_set, |
| 7390 | }; |