Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1 | /* -*- mode: c; c-basic-offset: 8; -*- |
| 2 | * vim: noexpandtab sw=8 ts=8 sts=0: |
| 3 | * |
| 4 | * inode.c |
| 5 | * |
| 6 | * vfs' aops, fops, dops and iops |
| 7 | * |
| 8 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public |
| 12 | * License as published by the Free Software Foundation; either |
| 13 | * version 2 of the License, or (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | * General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public |
| 21 | * License along with this program; if not, write to the |
| 22 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 23 | * Boston, MA 021110-1307, USA. |
| 24 | */ |
| 25 | |
| 26 | #include <linux/fs.h> |
| 27 | #include <linux/types.h> |
| 28 | #include <linux/slab.h> |
| 29 | #include <linux/highmem.h> |
| 30 | #include <linux/pagemap.h> |
| 31 | #include <linux/smp_lock.h> |
| 32 | |
| 33 | #include <asm/byteorder.h> |
| 34 | |
| 35 | #define MLOG_MASK_PREFIX ML_INODE |
| 36 | #include <cluster/masklog.h> |
| 37 | |
| 38 | #include "ocfs2.h" |
| 39 | |
| 40 | #include "alloc.h" |
| 41 | #include "dlmglue.h" |
| 42 | #include "extent_map.h" |
| 43 | #include "file.h" |
Mark Fasheh | b4df6ed | 2006-02-22 17:35:08 -0800 | [diff] [blame] | 44 | #include "heartbeat.h" |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 45 | #include "inode.h" |
| 46 | #include "journal.h" |
| 47 | #include "namei.h" |
| 48 | #include "suballoc.h" |
| 49 | #include "super.h" |
| 50 | #include "symlink.h" |
| 51 | #include "sysfile.h" |
| 52 | #include "uptodate.h" |
| 53 | #include "vote.h" |
| 54 | |
| 55 | #include "buffer_head_io.h" |
| 56 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 57 | struct ocfs2_find_inode_args |
| 58 | { |
| 59 | u64 fi_blkno; |
| 60 | unsigned long fi_ino; |
| 61 | unsigned int fi_flags; |
| 62 | }; |
| 63 | |
| 64 | static int ocfs2_read_locked_inode(struct inode *inode, |
| 65 | struct ocfs2_find_inode_args *args); |
| 66 | static int ocfs2_init_locked_inode(struct inode *inode, void *opaque); |
| 67 | static int ocfs2_find_actor(struct inode *inode, void *opaque); |
| 68 | static int ocfs2_truncate_for_delete(struct ocfs2_super *osb, |
| 69 | struct inode *inode, |
| 70 | struct buffer_head *fe_bh); |
| 71 | |
Herbert Poetzl | ca4d147 | 2006-07-03 17:27:12 -0700 | [diff] [blame] | 72 | void ocfs2_set_inode_flags(struct inode *inode) |
| 73 | { |
| 74 | unsigned int flags = OCFS2_I(inode)->ip_attr; |
| 75 | |
| 76 | inode->i_flags &= ~(S_IMMUTABLE | |
| 77 | S_SYNC | S_APPEND | S_NOATIME | S_DIRSYNC); |
| 78 | |
| 79 | if (flags & OCFS2_IMMUTABLE_FL) |
| 80 | inode->i_flags |= S_IMMUTABLE; |
| 81 | |
| 82 | if (flags & OCFS2_SYNC_FL) |
| 83 | inode->i_flags |= S_SYNC; |
| 84 | if (flags & OCFS2_APPEND_FL) |
| 85 | inode->i_flags |= S_APPEND; |
| 86 | if (flags & OCFS2_NOATIME_FL) |
| 87 | inode->i_flags |= S_NOATIME; |
| 88 | if (flags & OCFS2_DIRSYNC_FL) |
| 89 | inode->i_flags |= S_DIRSYNC; |
| 90 | } |
| 91 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 92 | struct inode *ocfs2_ilookup_for_vote(struct ocfs2_super *osb, |
| 93 | u64 blkno, |
| 94 | int delete_vote) |
| 95 | { |
| 96 | struct ocfs2_find_inode_args args; |
| 97 | |
| 98 | /* ocfs2_ilookup_for_vote should *only* be called from the |
| 99 | * vote thread */ |
| 100 | BUG_ON(current != osb->vote_task); |
| 101 | |
| 102 | args.fi_blkno = blkno; |
| 103 | args.fi_flags = OCFS2_FI_FLAG_NOWAIT; |
| 104 | if (delete_vote) |
| 105 | args.fi_flags |= OCFS2_FI_FLAG_DELETE; |
| 106 | args.fi_ino = ino_from_blkno(osb->sb, blkno); |
| 107 | return ilookup5(osb->sb, args.fi_ino, ocfs2_find_actor, &args); |
| 108 | } |
| 109 | |
Mark Fasheh | 24c19ef | 2006-09-22 17:28:19 -0700 | [diff] [blame] | 110 | struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, int flags) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 111 | { |
| 112 | struct inode *inode = NULL; |
| 113 | struct super_block *sb = osb->sb; |
| 114 | struct ocfs2_find_inode_args args; |
| 115 | |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 116 | mlog_entry("(blkno = %llu)\n", (unsigned long long)blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 117 | |
| 118 | /* Ok. By now we've either got the offsets passed to us by the |
| 119 | * caller, or we just pulled them off the bh. Lets do some |
| 120 | * sanity checks to make sure they're OK. */ |
| 121 | if (blkno == 0) { |
| 122 | inode = ERR_PTR(-EINVAL); |
| 123 | mlog_errno(PTR_ERR(inode)); |
| 124 | goto bail; |
| 125 | } |
| 126 | |
| 127 | args.fi_blkno = blkno; |
Mark Fasheh | 24c19ef | 2006-09-22 17:28:19 -0700 | [diff] [blame] | 128 | args.fi_flags = flags; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 129 | args.fi_ino = ino_from_blkno(sb, blkno); |
| 130 | |
| 131 | inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor, |
| 132 | ocfs2_init_locked_inode, &args); |
| 133 | /* inode was *not* in the inode cache. 2.6.x requires |
| 134 | * us to do our own read_inode call and unlock it |
| 135 | * afterwards. */ |
| 136 | if (inode && inode->i_state & I_NEW) { |
| 137 | mlog(0, "Inode was not in inode cache, reading it.\n"); |
| 138 | ocfs2_read_locked_inode(inode, &args); |
| 139 | unlock_new_inode(inode); |
| 140 | } |
| 141 | if (inode == NULL) { |
| 142 | inode = ERR_PTR(-ENOMEM); |
| 143 | mlog_errno(PTR_ERR(inode)); |
| 144 | goto bail; |
| 145 | } |
| 146 | if (is_bad_inode(inode)) { |
| 147 | iput(inode); |
| 148 | inode = ERR_PTR(-ESTALE); |
| 149 | mlog_errno(PTR_ERR(inode)); |
| 150 | goto bail; |
| 151 | } |
| 152 | |
| 153 | bail: |
| 154 | if (!IS_ERR(inode)) { |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 155 | mlog(0, "returning inode with number %llu\n", |
| 156 | (unsigned long long)OCFS2_I(inode)->ip_blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 157 | mlog_exit_ptr(inode); |
| 158 | } else |
| 159 | mlog_errno(PTR_ERR(inode)); |
| 160 | |
| 161 | return inode; |
| 162 | } |
| 163 | |
| 164 | |
| 165 | /* |
| 166 | * here's how inodes get read from disk: |
| 167 | * iget5_locked -> find_actor -> OCFS2_FIND_ACTOR |
| 168 | * found? : return the in-memory inode |
| 169 | * not found? : get_new_inode -> OCFS2_INIT_LOCKED_INODE |
| 170 | */ |
| 171 | |
| 172 | static int ocfs2_find_actor(struct inode *inode, void *opaque) |
| 173 | { |
| 174 | struct ocfs2_find_inode_args *args = NULL; |
| 175 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 176 | int ret = 0; |
| 177 | |
| 178 | mlog_entry("(0x%p, %lu, 0x%p)\n", inode, inode->i_ino, opaque); |
| 179 | |
| 180 | args = opaque; |
| 181 | |
| 182 | mlog_bug_on_msg(!inode, "No inode in find actor!\n"); |
| 183 | |
| 184 | if (oi->ip_blkno != args->fi_blkno) |
| 185 | goto bail; |
| 186 | |
| 187 | /* OCFS2_FI_FLAG_NOWAIT is *only* set from |
| 188 | * ocfs2_ilookup_for_vote which won't create an inode for one |
| 189 | * that isn't found. The vote thread which doesn't want to get |
| 190 | * an inode which is in the process of going away - otherwise |
| 191 | * the call to __wait_on_freeing_inode in find_inode_fast will |
| 192 | * cause it to deadlock on an inode which may be waiting on a |
| 193 | * vote (or lock release) in delete_inode */ |
| 194 | if ((args->fi_flags & OCFS2_FI_FLAG_NOWAIT) && |
| 195 | (inode->i_state & (I_FREEING|I_CLEAR))) { |
| 196 | /* As stated above, we're not going to return an |
| 197 | * inode. In the case of a delete vote, the voting |
| 198 | * code is going to signal the other node to go |
| 199 | * ahead. Mark that state here, so this freeing inode |
| 200 | * has the state when it gets to delete_inode. */ |
| 201 | if (args->fi_flags & OCFS2_FI_FLAG_DELETE) { |
| 202 | spin_lock(&oi->ip_lock); |
| 203 | ocfs2_mark_inode_remotely_deleted(inode); |
| 204 | spin_unlock(&oi->ip_lock); |
| 205 | } |
| 206 | goto bail; |
| 207 | } |
| 208 | |
| 209 | ret = 1; |
| 210 | bail: |
| 211 | mlog_exit(ret); |
| 212 | return ret; |
| 213 | } |
| 214 | |
| 215 | /* |
| 216 | * initialize the new inode, but don't do anything that would cause |
| 217 | * us to sleep. |
| 218 | * return 0 on success, 1 on failure |
| 219 | */ |
| 220 | static int ocfs2_init_locked_inode(struct inode *inode, void *opaque) |
| 221 | { |
| 222 | struct ocfs2_find_inode_args *args = opaque; |
| 223 | |
| 224 | mlog_entry("inode = %p, opaque = %p\n", inode, opaque); |
| 225 | |
| 226 | inode->i_ino = args->fi_ino; |
| 227 | OCFS2_I(inode)->ip_blkno = args->fi_blkno; |
| 228 | |
| 229 | mlog_exit(0); |
| 230 | return 0; |
| 231 | } |
| 232 | |
| 233 | int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe, |
| 234 | int create_ino) |
| 235 | { |
| 236 | struct super_block *sb; |
| 237 | struct ocfs2_super *osb; |
| 238 | int status = -EINVAL; |
| 239 | |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 240 | mlog_entry("(0x%p, size:%llu)\n", inode, |
| 241 | (unsigned long long)fe->i_size); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 242 | |
| 243 | sb = inode->i_sb; |
| 244 | osb = OCFS2_SB(sb); |
| 245 | |
| 246 | /* this means that read_inode cannot create a superblock inode |
| 247 | * today. change if needed. */ |
| 248 | if (!OCFS2_IS_VALID_DINODE(fe) || |
| 249 | !(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL))) { |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 250 | mlog(ML_ERROR, "Invalid dinode: i_ino=%lu, i_blkno=%llu, " |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 251 | "signature = %.*s, flags = 0x%x\n", |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 252 | inode->i_ino, |
| 253 | (unsigned long long)le64_to_cpu(fe->i_blkno), 7, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 254 | fe->i_signature, le32_to_cpu(fe->i_flags)); |
| 255 | goto bail; |
| 256 | } |
| 257 | |
| 258 | if (le32_to_cpu(fe->i_fs_generation) != osb->fs_generation) { |
| 259 | mlog(ML_ERROR, "file entry generation does not match " |
| 260 | "superblock! osb->fs_generation=%x, " |
| 261 | "fe->i_fs_generation=%x\n", |
| 262 | osb->fs_generation, le32_to_cpu(fe->i_fs_generation)); |
| 263 | goto bail; |
| 264 | } |
| 265 | |
| 266 | inode->i_version = 1; |
| 267 | inode->i_generation = le32_to_cpu(fe->i_generation); |
| 268 | inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev)); |
| 269 | inode->i_mode = le16_to_cpu(fe->i_mode); |
| 270 | inode->i_uid = le32_to_cpu(fe->i_uid); |
| 271 | inode->i_gid = le32_to_cpu(fe->i_gid); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 272 | |
| 273 | /* Fast symlinks will have i_size but no allocated clusters. */ |
| 274 | if (S_ISLNK(inode->i_mode) && !fe->i_clusters) |
| 275 | inode->i_blocks = 0; |
| 276 | else |
| 277 | inode->i_blocks = |
| 278 | ocfs2_align_bytes_to_sectors(le64_to_cpu(fe->i_size)); |
| 279 | inode->i_mapping->a_ops = &ocfs2_aops; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 280 | inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime); |
| 281 | inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec); |
| 282 | inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime); |
| 283 | inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec); |
| 284 | inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime); |
| 285 | inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec); |
| 286 | |
| 287 | if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno)) |
| 288 | mlog(ML_ERROR, |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 289 | "ip_blkno %llu != i_blkno %llu!\n", |
| 290 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 291 | (unsigned long long)fe->i_blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 292 | |
| 293 | OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters); |
| 294 | OCFS2_I(inode)->ip_orphaned_slot = OCFS2_INVALID_SLOT; |
Herbert Poetzl | ca4d147 | 2006-07-03 17:27:12 -0700 | [diff] [blame] | 295 | OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 296 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 297 | inode->i_nlink = le16_to_cpu(fe->i_links_count); |
| 298 | |
Mark Fasheh | 24c19ef | 2006-09-22 17:28:19 -0700 | [diff] [blame] | 299 | if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) |
| 300 | OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE; |
| 301 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 302 | if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) { |
| 303 | OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP; |
| 304 | mlog(0, "local alloc inode: i_ino=%lu\n", inode->i_ino); |
| 305 | } else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) { |
| 306 | OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP; |
| 307 | } else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) { |
| 308 | mlog(0, "superblock inode: i_ino=%lu\n", inode->i_ino); |
| 309 | /* we can't actually hit this as read_inode can't |
| 310 | * handle superblocks today ;-) */ |
| 311 | BUG(); |
| 312 | } |
| 313 | |
| 314 | switch (inode->i_mode & S_IFMT) { |
| 315 | case S_IFREG: |
| 316 | inode->i_fop = &ocfs2_fops; |
| 317 | inode->i_op = &ocfs2_file_iops; |
| 318 | i_size_write(inode, le64_to_cpu(fe->i_size)); |
| 319 | break; |
| 320 | case S_IFDIR: |
| 321 | inode->i_op = &ocfs2_dir_iops; |
| 322 | inode->i_fop = &ocfs2_dops; |
| 323 | i_size_write(inode, le64_to_cpu(fe->i_size)); |
| 324 | break; |
| 325 | case S_IFLNK: |
| 326 | if (ocfs2_inode_is_fast_symlink(inode)) |
| 327 | inode->i_op = &ocfs2_fast_symlink_inode_operations; |
| 328 | else |
| 329 | inode->i_op = &ocfs2_symlink_inode_operations; |
| 330 | i_size_write(inode, le64_to_cpu(fe->i_size)); |
| 331 | break; |
| 332 | default: |
| 333 | inode->i_op = &ocfs2_special_file_iops; |
| 334 | init_special_inode(inode, inode->i_mode, |
| 335 | inode->i_rdev); |
| 336 | break; |
| 337 | } |
| 338 | |
Mark Fasheh | 24c19ef | 2006-09-22 17:28:19 -0700 | [diff] [blame] | 339 | if (create_ino) { |
| 340 | inode->i_ino = ino_from_blkno(inode->i_sb, |
| 341 | le64_to_cpu(fe->i_blkno)); |
| 342 | |
| 343 | /* |
| 344 | * If we ever want to create system files from kernel, |
| 345 | * the generation argument to |
| 346 | * ocfs2_inode_lock_res_init() will have to change. |
| 347 | */ |
| 348 | BUG_ON(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)); |
| 349 | |
| 350 | ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_meta_lockres, |
| 351 | OCFS2_LOCK_TYPE_META, 0, inode); |
| 352 | } |
| 353 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 354 | ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres, |
Mark Fasheh | 24c19ef | 2006-09-22 17:28:19 -0700 | [diff] [blame] | 355 | OCFS2_LOCK_TYPE_RW, inode->i_generation, |
| 356 | inode); |
| 357 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 358 | ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_data_lockres, |
Mark Fasheh | 24c19ef | 2006-09-22 17:28:19 -0700 | [diff] [blame] | 359 | OCFS2_LOCK_TYPE_DATA, inode->i_generation, |
| 360 | inode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 361 | |
Herbert Poetzl | ca4d147 | 2006-07-03 17:27:12 -0700 | [diff] [blame] | 362 | ocfs2_set_inode_flags(inode); |
| 363 | inode->i_flags |= S_NOATIME; |
| 364 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 365 | status = 0; |
| 366 | bail: |
| 367 | mlog_exit(status); |
| 368 | return status; |
| 369 | } |
| 370 | |
| 371 | static int ocfs2_read_locked_inode(struct inode *inode, |
| 372 | struct ocfs2_find_inode_args *args) |
| 373 | { |
| 374 | struct super_block *sb; |
| 375 | struct ocfs2_super *osb; |
| 376 | struct ocfs2_dinode *fe; |
| 377 | struct buffer_head *bh = NULL; |
Mark Fasheh | 24c19ef | 2006-09-22 17:28:19 -0700 | [diff] [blame] | 378 | int status, can_lock; |
| 379 | u32 generation = 0; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 380 | |
| 381 | mlog_entry("(0x%p, 0x%p)\n", inode, args); |
| 382 | |
| 383 | status = -EINVAL; |
| 384 | if (inode == NULL || inode->i_sb == NULL) { |
| 385 | mlog(ML_ERROR, "bad inode\n"); |
Mark Fasheh | 24c19ef | 2006-09-22 17:28:19 -0700 | [diff] [blame] | 386 | return status; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 387 | } |
| 388 | sb = inode->i_sb; |
| 389 | osb = OCFS2_SB(sb); |
| 390 | |
| 391 | if (!args) { |
| 392 | mlog(ML_ERROR, "bad inode args\n"); |
| 393 | make_bad_inode(inode); |
Mark Fasheh | 24c19ef | 2006-09-22 17:28:19 -0700 | [diff] [blame] | 394 | return status; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 395 | } |
| 396 | |
Mark Fasheh | 24c19ef | 2006-09-22 17:28:19 -0700 | [diff] [blame] | 397 | /* |
| 398 | * To improve performance of cold-cache inode stats, we take |
| 399 | * the cluster lock here if possible. |
| 400 | * |
| 401 | * Generally, OCFS2 never trusts the contents of an inode |
| 402 | * unless it's holding a cluster lock, so taking it here isn't |
| 403 | * a correctness issue as much as it is a performance |
| 404 | * improvement. |
| 405 | * |
| 406 | * There are three times when taking the lock is not a good idea: |
| 407 | * |
| 408 | * 1) During startup, before we have initialized the DLM. |
| 409 | * |
| 410 | * 2) If we are reading certain system files which never get |
| 411 | * cluster locks (local alloc, truncate log). |
| 412 | * |
| 413 | * 3) If the process doing the iget() is responsible for |
| 414 | * orphan dir recovery. We're holding the orphan dir lock and |
| 415 | * can get into a deadlock with another process on another |
| 416 | * node in ->delete_inode(). |
| 417 | * |
| 418 | * #1 and #2 can be simply solved by never taking the lock |
| 419 | * here for system files (which are the only type we read |
| 420 | * during mount). It's a heavier approach, but our main |
| 421 | * concern is user-accesible files anyway. |
| 422 | * |
| 423 | * #3 works itself out because we'll eventually take the |
| 424 | * cluster lock before trusting anything anyway. |
| 425 | */ |
| 426 | can_lock = !(args->fi_flags & OCFS2_FI_FLAG_SYSFILE) |
| 427 | && !(args->fi_flags & OCFS2_FI_FLAG_NOLOCK); |
| 428 | |
| 429 | /* |
| 430 | * To maintain backwards compatibility with older versions of |
| 431 | * ocfs2-tools, we still store the generation value for system |
| 432 | * files. The only ones that actually matter to userspace are |
| 433 | * the journals, but it's easier and inexpensive to just flag |
| 434 | * all system files similarly. |
| 435 | */ |
| 436 | if (args->fi_flags & OCFS2_FI_FLAG_SYSFILE) |
| 437 | generation = osb->fs_generation; |
| 438 | |
| 439 | ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_meta_lockres, |
| 440 | OCFS2_LOCK_TYPE_META, |
| 441 | generation, inode); |
| 442 | |
| 443 | if (can_lock) { |
Mark Fasheh | 4bcec18 | 2006-10-09 16:02:40 -0700 | [diff] [blame^] | 444 | status = ocfs2_meta_lock(inode, NULL, 0); |
Mark Fasheh | 24c19ef | 2006-09-22 17:28:19 -0700 | [diff] [blame] | 445 | if (status) { |
| 446 | make_bad_inode(inode); |
| 447 | mlog_errno(status); |
| 448 | return status; |
| 449 | } |
| 450 | } |
| 451 | |
| 452 | status = ocfs2_read_block(osb, args->fi_blkno, &bh, 0, |
| 453 | can_lock ? inode : NULL); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 454 | if (status < 0) { |
| 455 | mlog_errno(status); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 456 | goto bail; |
| 457 | } |
| 458 | |
Mark Fasheh | 24c19ef | 2006-09-22 17:28:19 -0700 | [diff] [blame] | 459 | status = -EINVAL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 460 | fe = (struct ocfs2_dinode *) bh->b_data; |
| 461 | if (!OCFS2_IS_VALID_DINODE(fe)) { |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 462 | mlog(ML_ERROR, "Invalid dinode #%llu: signature = %.*s\n", |
| 463 | (unsigned long long)fe->i_blkno, 7, fe->i_signature); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 464 | goto bail; |
| 465 | } |
| 466 | |
Mark Fasheh | 24c19ef | 2006-09-22 17:28:19 -0700 | [diff] [blame] | 467 | /* |
| 468 | * This is a code bug. Right now the caller needs to |
| 469 | * understand whether it is asking for a system file inode or |
| 470 | * not so the proper lock names can be built. |
| 471 | */ |
| 472 | mlog_bug_on_msg(!!(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) != |
| 473 | !!(args->fi_flags & OCFS2_FI_FLAG_SYSFILE), |
| 474 | "Inode %llu: system file state is ambigous\n", |
| 475 | (unsigned long long)args->fi_blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 476 | |
| 477 | if (S_ISCHR(le16_to_cpu(fe->i_mode)) || |
| 478 | S_ISBLK(le16_to_cpu(fe->i_mode))) |
| 479 | inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev)); |
| 480 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 481 | if (ocfs2_populate_inode(inode, fe, 0) < 0) { |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 482 | mlog(ML_ERROR, "populate failed! i_blkno=%llu, i_ino=%lu\n", |
| 483 | (unsigned long long)fe->i_blkno, inode->i_ino); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 484 | goto bail; |
| 485 | } |
| 486 | |
| 487 | BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno)); |
| 488 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 489 | status = 0; |
| 490 | |
| 491 | bail: |
Mark Fasheh | 24c19ef | 2006-09-22 17:28:19 -0700 | [diff] [blame] | 492 | if (can_lock) |
| 493 | ocfs2_meta_unlock(inode, 0); |
| 494 | |
| 495 | if (status < 0) |
| 496 | make_bad_inode(inode); |
| 497 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 498 | if (args && bh) |
| 499 | brelse(bh); |
| 500 | |
| 501 | mlog_exit(status); |
| 502 | return status; |
| 503 | } |
| 504 | |
| 505 | void ocfs2_sync_blockdev(struct super_block *sb) |
| 506 | { |
| 507 | sync_blockdev(sb->s_bdev); |
| 508 | } |
| 509 | |
| 510 | static int ocfs2_truncate_for_delete(struct ocfs2_super *osb, |
| 511 | struct inode *inode, |
| 512 | struct buffer_head *fe_bh) |
| 513 | { |
| 514 | int status = 0; |
| 515 | struct ocfs2_journal_handle *handle = NULL; |
| 516 | struct ocfs2_truncate_context *tc = NULL; |
| 517 | struct ocfs2_dinode *fe; |
| 518 | |
| 519 | mlog_entry_void(); |
| 520 | |
| 521 | fe = (struct ocfs2_dinode *) fe_bh->b_data; |
| 522 | |
| 523 | /* zero allocation, zero truncate :) */ |
| 524 | if (!fe->i_clusters) |
| 525 | goto bail; |
| 526 | |
| 527 | handle = ocfs2_start_trans(osb, handle, OCFS2_INODE_UPDATE_CREDITS); |
| 528 | if (IS_ERR(handle)) { |
| 529 | status = PTR_ERR(handle); |
| 530 | handle = NULL; |
| 531 | mlog_errno(status); |
| 532 | goto bail; |
| 533 | } |
| 534 | |
| 535 | status = ocfs2_set_inode_size(handle, inode, fe_bh, 0ULL); |
| 536 | if (status < 0) { |
| 537 | mlog_errno(status); |
| 538 | goto bail; |
| 539 | } |
| 540 | |
| 541 | ocfs2_commit_trans(handle); |
| 542 | handle = NULL; |
| 543 | |
| 544 | status = ocfs2_prepare_truncate(osb, inode, fe_bh, &tc); |
| 545 | if (status < 0) { |
| 546 | mlog_errno(status); |
| 547 | goto bail; |
| 548 | } |
| 549 | |
| 550 | status = ocfs2_commit_truncate(osb, inode, fe_bh, tc); |
| 551 | if (status < 0) { |
| 552 | mlog_errno(status); |
| 553 | goto bail; |
| 554 | } |
| 555 | bail: |
| 556 | if (handle) |
| 557 | ocfs2_commit_trans(handle); |
| 558 | |
| 559 | mlog_exit(status); |
| 560 | return status; |
| 561 | } |
| 562 | |
| 563 | static int ocfs2_remove_inode(struct inode *inode, |
| 564 | struct buffer_head *di_bh, |
| 565 | struct inode *orphan_dir_inode, |
| 566 | struct buffer_head *orphan_dir_bh) |
| 567 | { |
| 568 | int status; |
| 569 | struct inode *inode_alloc_inode = NULL; |
| 570 | struct buffer_head *inode_alloc_bh = NULL; |
| 571 | struct ocfs2_journal_handle *handle; |
| 572 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 573 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data; |
| 574 | |
| 575 | inode_alloc_inode = |
| 576 | ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE, |
| 577 | le16_to_cpu(di->i_suballoc_slot)); |
| 578 | if (!inode_alloc_inode) { |
| 579 | status = -EEXIST; |
| 580 | mlog_errno(status); |
| 581 | goto bail; |
| 582 | } |
| 583 | |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 584 | mutex_lock(&inode_alloc_inode->i_mutex); |
Mark Fasheh | 4bcec18 | 2006-10-09 16:02:40 -0700 | [diff] [blame^] | 585 | status = ocfs2_meta_lock(inode_alloc_inode, &inode_alloc_bh, 1); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 586 | if (status < 0) { |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 587 | mutex_unlock(&inode_alloc_inode->i_mutex); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 588 | |
| 589 | mlog_errno(status); |
| 590 | goto bail; |
| 591 | } |
| 592 | |
| 593 | handle = ocfs2_start_trans(osb, NULL, OCFS2_DELETE_INODE_CREDITS); |
| 594 | if (IS_ERR(handle)) { |
| 595 | status = PTR_ERR(handle); |
| 596 | mlog_errno(status); |
| 597 | goto bail_unlock; |
| 598 | } |
| 599 | |
| 600 | status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode, |
| 601 | orphan_dir_bh); |
| 602 | if (status < 0) { |
| 603 | mlog_errno(status); |
| 604 | goto bail_commit; |
| 605 | } |
| 606 | |
| 607 | /* set the inodes dtime */ |
| 608 | status = ocfs2_journal_access(handle, inode, di_bh, |
| 609 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 610 | if (status < 0) { |
| 611 | mlog_errno(status); |
| 612 | goto bail_commit; |
| 613 | } |
| 614 | |
| 615 | di->i_dtime = cpu_to_le64(CURRENT_TIME.tv_sec); |
| 616 | le32_and_cpu(&di->i_flags, ~(OCFS2_VALID_FL | OCFS2_ORPHANED_FL)); |
| 617 | |
| 618 | status = ocfs2_journal_dirty(handle, di_bh); |
| 619 | if (status < 0) { |
| 620 | mlog_errno(status); |
| 621 | goto bail_commit; |
| 622 | } |
| 623 | |
| 624 | ocfs2_remove_from_cache(inode, di_bh); |
| 625 | |
| 626 | status = ocfs2_free_dinode(handle, inode_alloc_inode, |
| 627 | inode_alloc_bh, di); |
| 628 | if (status < 0) |
| 629 | mlog_errno(status); |
| 630 | |
| 631 | bail_commit: |
| 632 | ocfs2_commit_trans(handle); |
| 633 | bail_unlock: |
| 634 | ocfs2_meta_unlock(inode_alloc_inode, 1); |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 635 | mutex_unlock(&inode_alloc_inode->i_mutex); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 636 | brelse(inode_alloc_bh); |
| 637 | bail: |
| 638 | iput(inode_alloc_inode); |
| 639 | |
| 640 | return status; |
| 641 | } |
| 642 | |
Mark Fasheh | b4df6ed | 2006-02-22 17:35:08 -0800 | [diff] [blame] | 643 | /* |
| 644 | * Serialize with orphan dir recovery. If the process doing |
| 645 | * recovery on this orphan dir does an iget() with the dir |
| 646 | * i_mutex held, we'll deadlock here. Instead we detect this |
| 647 | * and exit early - recovery will wipe this inode for us. |
| 648 | */ |
| 649 | static int ocfs2_check_orphan_recovery_state(struct ocfs2_super *osb, |
| 650 | int slot) |
| 651 | { |
| 652 | int ret = 0; |
| 653 | |
| 654 | spin_lock(&osb->osb_lock); |
| 655 | if (ocfs2_node_map_test_bit(osb, &osb->osb_recovering_orphan_dirs, slot)) { |
| 656 | mlog(0, "Recovery is happening on orphan dir %d, will skip " |
| 657 | "this inode\n", slot); |
| 658 | ret = -EDEADLK; |
| 659 | goto out; |
| 660 | } |
| 661 | /* This signals to the orphan recovery process that it should |
| 662 | * wait for us to handle the wipe. */ |
| 663 | osb->osb_orphan_wipes[slot]++; |
| 664 | out: |
| 665 | spin_unlock(&osb->osb_lock); |
| 666 | return ret; |
| 667 | } |
| 668 | |
| 669 | static void ocfs2_signal_wipe_completion(struct ocfs2_super *osb, |
| 670 | int slot) |
| 671 | { |
| 672 | spin_lock(&osb->osb_lock); |
| 673 | osb->osb_orphan_wipes[slot]--; |
| 674 | spin_unlock(&osb->osb_lock); |
| 675 | |
| 676 | wake_up(&osb->osb_wipe_event); |
| 677 | } |
| 678 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 679 | static int ocfs2_wipe_inode(struct inode *inode, |
| 680 | struct buffer_head *di_bh) |
| 681 | { |
| 682 | int status, orphaned_slot; |
| 683 | struct inode *orphan_dir_inode = NULL; |
| 684 | struct buffer_head *orphan_dir_bh = NULL; |
| 685 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 686 | |
| 687 | /* We've already voted on this so it should be readonly - no |
| 688 | * spinlock needed. */ |
| 689 | orphaned_slot = OCFS2_I(inode)->ip_orphaned_slot; |
Mark Fasheh | b4df6ed | 2006-02-22 17:35:08 -0800 | [diff] [blame] | 690 | |
| 691 | status = ocfs2_check_orphan_recovery_state(osb, orphaned_slot); |
| 692 | if (status) |
| 693 | return status; |
| 694 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 695 | orphan_dir_inode = ocfs2_get_system_file_inode(osb, |
| 696 | ORPHAN_DIR_SYSTEM_INODE, |
| 697 | orphaned_slot); |
| 698 | if (!orphan_dir_inode) { |
| 699 | status = -EEXIST; |
| 700 | mlog_errno(status); |
| 701 | goto bail; |
| 702 | } |
| 703 | |
| 704 | /* Lock the orphan dir. The lock will be held for the entire |
| 705 | * delete_inode operation. We do this now to avoid races with |
| 706 | * recovery completion on other nodes. */ |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 707 | mutex_lock(&orphan_dir_inode->i_mutex); |
Mark Fasheh | 4bcec18 | 2006-10-09 16:02:40 -0700 | [diff] [blame^] | 708 | status = ocfs2_meta_lock(orphan_dir_inode, &orphan_dir_bh, 1); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 709 | if (status < 0) { |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 710 | mutex_unlock(&orphan_dir_inode->i_mutex); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 711 | |
| 712 | mlog_errno(status); |
| 713 | goto bail; |
| 714 | } |
| 715 | |
| 716 | /* we do this while holding the orphan dir lock because we |
| 717 | * don't want recovery being run from another node to vote for |
| 718 | * an inode delete on us -- this will result in two nodes |
| 719 | * truncating the same file! */ |
| 720 | status = ocfs2_truncate_for_delete(osb, inode, di_bh); |
| 721 | if (status < 0) { |
| 722 | mlog_errno(status); |
| 723 | goto bail_unlock_dir; |
| 724 | } |
| 725 | |
| 726 | status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode, |
| 727 | orphan_dir_bh); |
| 728 | if (status < 0) |
| 729 | mlog_errno(status); |
| 730 | |
| 731 | bail_unlock_dir: |
| 732 | ocfs2_meta_unlock(orphan_dir_inode, 1); |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 733 | mutex_unlock(&orphan_dir_inode->i_mutex); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 734 | brelse(orphan_dir_bh); |
| 735 | bail: |
| 736 | iput(orphan_dir_inode); |
Mark Fasheh | b4df6ed | 2006-02-22 17:35:08 -0800 | [diff] [blame] | 737 | ocfs2_signal_wipe_completion(osb, orphaned_slot); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 738 | |
| 739 | return status; |
| 740 | } |
| 741 | |
| 742 | /* There is a series of simple checks that should be done before a |
| 743 | * vote is even considered. Encapsulate those in this function. */ |
| 744 | static int ocfs2_inode_is_valid_to_delete(struct inode *inode) |
| 745 | { |
| 746 | int ret = 0; |
| 747 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 748 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 749 | |
| 750 | /* We shouldn't be getting here for the root directory |
| 751 | * inode.. */ |
| 752 | if (inode == osb->root_inode) { |
| 753 | mlog(ML_ERROR, "Skipping delete of root inode.\n"); |
| 754 | goto bail; |
| 755 | } |
| 756 | |
| 757 | /* If we're coming from process_vote we can't go into our own |
| 758 | * voting [hello, deadlock city!], so unforuntately we just |
| 759 | * have to skip deleting this guy. That's OK though because |
| 760 | * the node who's doing the actual deleting should handle it |
| 761 | * anyway. */ |
| 762 | if (current == osb->vote_task) { |
| 763 | mlog(0, "Skipping delete of %lu because we're currently " |
| 764 | "in process_vote\n", inode->i_ino); |
| 765 | goto bail; |
| 766 | } |
| 767 | |
| 768 | spin_lock(&oi->ip_lock); |
| 769 | /* OCFS2 *never* deletes system files. This should technically |
| 770 | * never get here as system file inodes should always have a |
| 771 | * positive link count. */ |
| 772 | if (oi->ip_flags & OCFS2_INODE_SYSTEM_FILE) { |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 773 | mlog(ML_ERROR, "Skipping delete of system file %llu\n", |
| 774 | (unsigned long long)oi->ip_blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 775 | goto bail_unlock; |
| 776 | } |
| 777 | |
| 778 | /* If we have voted "yes" on the wipe of this inode for |
| 779 | * another node, it will be marked here so we can safely skip |
| 780 | * it. Recovery will cleanup any inodes we might inadvertantly |
| 781 | * skip here. */ |
| 782 | if (oi->ip_flags & OCFS2_INODE_SKIP_DELETE) { |
| 783 | mlog(0, "Skipping delete of %lu because another node " |
| 784 | "has done this for us.\n", inode->i_ino); |
| 785 | goto bail_unlock; |
| 786 | } |
| 787 | |
| 788 | ret = 1; |
| 789 | bail_unlock: |
| 790 | spin_unlock(&oi->ip_lock); |
| 791 | bail: |
| 792 | return ret; |
| 793 | } |
| 794 | |
| 795 | /* Query the cluster to determine whether we should wipe an inode from |
| 796 | * disk or not. |
| 797 | * |
| 798 | * Requires the inode to have the cluster lock. */ |
| 799 | static int ocfs2_query_inode_wipe(struct inode *inode, |
| 800 | struct buffer_head *di_bh, |
| 801 | int *wipe) |
| 802 | { |
| 803 | int status = 0; |
| 804 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 805 | struct ocfs2_dinode *di; |
| 806 | |
| 807 | *wipe = 0; |
| 808 | |
| 809 | /* While we were waiting for the cluster lock in |
| 810 | * ocfs2_delete_inode, another node might have asked to delete |
| 811 | * the inode. Recheck our flags to catch this. */ |
| 812 | if (!ocfs2_inode_is_valid_to_delete(inode)) { |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 813 | mlog(0, "Skipping delete of %llu because flags changed\n", |
| 814 | (unsigned long long)oi->ip_blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 815 | goto bail; |
| 816 | } |
| 817 | |
| 818 | /* Now that we have an up to date inode, we can double check |
| 819 | * the link count. */ |
| 820 | if (inode->i_nlink) { |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 821 | mlog(0, "Skipping delete of %llu because nlink = %u\n", |
| 822 | (unsigned long long)oi->ip_blkno, inode->i_nlink); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 823 | goto bail; |
| 824 | } |
| 825 | |
| 826 | /* Do some basic inode verification... */ |
| 827 | di = (struct ocfs2_dinode *) di_bh->b_data; |
| 828 | if (!(di->i_flags & cpu_to_le32(OCFS2_ORPHANED_FL))) { |
| 829 | /* for lack of a better error? */ |
| 830 | status = -EEXIST; |
| 831 | mlog(ML_ERROR, |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 832 | "Inode %llu (on-disk %llu) not orphaned! " |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 833 | "Disk flags 0x%x, inode flags 0x%x\n", |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 834 | (unsigned long long)oi->ip_blkno, |
| 835 | (unsigned long long)di->i_blkno, di->i_flags, |
| 836 | oi->ip_flags); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 837 | goto bail; |
| 838 | } |
| 839 | |
| 840 | /* has someone already deleted us?! baaad... */ |
| 841 | if (di->i_dtime) { |
| 842 | status = -EEXIST; |
| 843 | mlog_errno(status); |
| 844 | goto bail; |
| 845 | } |
| 846 | |
| 847 | status = ocfs2_request_delete_vote(inode); |
| 848 | /* -EBUSY means that other nodes are still using the |
| 849 | * inode. We're done here though, so avoid doing anything on |
| 850 | * disk and let them worry about deleting it. */ |
| 851 | if (status == -EBUSY) { |
| 852 | status = 0; |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 853 | mlog(0, "Skipping delete of %llu because it is in use on" |
| 854 | "other nodes\n", (unsigned long long)oi->ip_blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 855 | goto bail; |
| 856 | } |
| 857 | if (status < 0) { |
| 858 | mlog_errno(status); |
| 859 | goto bail; |
| 860 | } |
| 861 | |
| 862 | spin_lock(&oi->ip_lock); |
| 863 | if (oi->ip_orphaned_slot == OCFS2_INVALID_SLOT) { |
| 864 | /* Nobody knew which slot this inode was orphaned |
| 865 | * into. This may happen during node death and |
| 866 | * recovery knows how to clean it up so we can safely |
| 867 | * ignore this inode for now on. */ |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 868 | mlog(0, "Nobody knew where inode %llu was orphaned!\n", |
| 869 | (unsigned long long)oi->ip_blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 870 | } else { |
| 871 | *wipe = 1; |
| 872 | |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 873 | mlog(0, "Inode %llu is ok to wipe from orphan dir %d\n", |
| 874 | (unsigned long long)oi->ip_blkno, oi->ip_orphaned_slot); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 875 | } |
| 876 | spin_unlock(&oi->ip_lock); |
| 877 | |
| 878 | bail: |
| 879 | return status; |
| 880 | } |
| 881 | |
| 882 | /* Support function for ocfs2_delete_inode. Will help us keep the |
| 883 | * inode data in a consistent state for clear_inode. Always truncates |
| 884 | * pages, optionally sync's them first. */ |
| 885 | static void ocfs2_cleanup_delete_inode(struct inode *inode, |
| 886 | int sync_data) |
| 887 | { |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 888 | mlog(0, "Cleanup inode %llu, sync = %d\n", |
| 889 | (unsigned long long)OCFS2_I(inode)->ip_blkno, sync_data); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 890 | if (sync_data) |
| 891 | write_inode_now(inode, 1); |
| 892 | truncate_inode_pages(&inode->i_data, 0); |
| 893 | } |
| 894 | |
| 895 | void ocfs2_delete_inode(struct inode *inode) |
| 896 | { |
| 897 | int wipe, status; |
| 898 | sigset_t blocked, oldset; |
| 899 | struct buffer_head *di_bh = NULL; |
| 900 | |
| 901 | mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino); |
| 902 | |
| 903 | if (is_bad_inode(inode)) { |
| 904 | mlog(0, "Skipping delete of bad inode\n"); |
| 905 | goto bail; |
| 906 | } |
| 907 | |
| 908 | if (!ocfs2_inode_is_valid_to_delete(inode)) { |
| 909 | /* It's probably not necessary to truncate_inode_pages |
| 910 | * here but we do it for safety anyway (it will most |
| 911 | * likely be a no-op anyway) */ |
| 912 | ocfs2_cleanup_delete_inode(inode, 0); |
| 913 | goto bail; |
| 914 | } |
| 915 | |
| 916 | /* We want to block signals in delete_inode as the lock and |
| 917 | * messaging paths may return us -ERESTARTSYS. Which would |
| 918 | * cause us to exit early, resulting in inodes being orphaned |
| 919 | * forever. */ |
| 920 | sigfillset(&blocked); |
| 921 | status = sigprocmask(SIG_BLOCK, &blocked, &oldset); |
| 922 | if (status < 0) { |
| 923 | mlog_errno(status); |
| 924 | ocfs2_cleanup_delete_inode(inode, 1); |
| 925 | goto bail; |
| 926 | } |
| 927 | |
| 928 | /* Lock down the inode. This gives us an up to date view of |
| 929 | * it's metadata (for verification), and allows us to |
| 930 | * serialize delete_inode votes. |
| 931 | * |
| 932 | * Even though we might be doing a truncate, we don't take the |
| 933 | * allocation lock here as it won't be needed - nobody will |
| 934 | * have the file open. |
| 935 | */ |
Mark Fasheh | 4bcec18 | 2006-10-09 16:02:40 -0700 | [diff] [blame^] | 936 | status = ocfs2_meta_lock(inode, &di_bh, 1); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 937 | if (status < 0) { |
| 938 | if (status != -ENOENT) |
| 939 | mlog_errno(status); |
| 940 | ocfs2_cleanup_delete_inode(inode, 0); |
| 941 | goto bail_unblock; |
| 942 | } |
| 943 | |
| 944 | /* Query the cluster. This will be the final decision made |
| 945 | * before we go ahead and wipe the inode. */ |
| 946 | status = ocfs2_query_inode_wipe(inode, di_bh, &wipe); |
| 947 | if (!wipe || status < 0) { |
| 948 | /* Error and inode busy vote both mean we won't be |
| 949 | * removing the inode, so they take almost the same |
| 950 | * path. */ |
| 951 | if (status < 0) |
| 952 | mlog_errno(status); |
| 953 | |
| 954 | /* Someone in the cluster has voted to not wipe this |
| 955 | * inode, or it was never completely orphaned. Write |
| 956 | * out the pages and exit now. */ |
| 957 | ocfs2_cleanup_delete_inode(inode, 1); |
| 958 | goto bail_unlock_inode; |
| 959 | } |
| 960 | |
| 961 | ocfs2_cleanup_delete_inode(inode, 0); |
| 962 | |
| 963 | status = ocfs2_wipe_inode(inode, di_bh); |
| 964 | if (status < 0) { |
Mark Fasheh | b4df6ed | 2006-02-22 17:35:08 -0800 | [diff] [blame] | 965 | if (status != -EDEADLK) |
| 966 | mlog_errno(status); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 967 | goto bail_unlock_inode; |
| 968 | } |
| 969 | |
Mark Fasheh | 24c19ef | 2006-09-22 17:28:19 -0700 | [diff] [blame] | 970 | /* |
| 971 | * Mark the inode as successfully deleted. |
| 972 | * |
| 973 | * This is important for ocfs2_clear_inode() as it will check |
| 974 | * this flag and skip any checkpointing work |
| 975 | * |
| 976 | * ocfs2_stuff_meta_lvb() also uses this flag to invalidate |
| 977 | * the LVB for other nodes. |
| 978 | */ |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 979 | OCFS2_I(inode)->ip_flags |= OCFS2_INODE_DELETED; |
| 980 | |
| 981 | bail_unlock_inode: |
| 982 | ocfs2_meta_unlock(inode, 1); |
| 983 | brelse(di_bh); |
| 984 | bail_unblock: |
| 985 | status = sigprocmask(SIG_SETMASK, &oldset, NULL); |
| 986 | if (status < 0) |
| 987 | mlog_errno(status); |
| 988 | bail: |
| 989 | clear_inode(inode); |
| 990 | mlog_exit_void(); |
| 991 | } |
| 992 | |
| 993 | void ocfs2_clear_inode(struct inode *inode) |
| 994 | { |
| 995 | int status; |
| 996 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 997 | |
| 998 | mlog_entry_void(); |
| 999 | |
| 1000 | if (!inode) |
| 1001 | goto bail; |
| 1002 | |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1003 | mlog(0, "Clearing inode: %llu, nlink = %u\n", |
| 1004 | (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_nlink); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1005 | |
| 1006 | mlog_bug_on_msg(OCFS2_SB(inode->i_sb) == NULL, |
| 1007 | "Inode=%lu\n", inode->i_ino); |
| 1008 | |
| 1009 | /* Do these before all the other work so that we don't bounce |
| 1010 | * the vote thread while waiting to destroy the locks. */ |
| 1011 | ocfs2_mark_lockres_freeing(&oi->ip_rw_lockres); |
| 1012 | ocfs2_mark_lockres_freeing(&oi->ip_meta_lockres); |
| 1013 | ocfs2_mark_lockres_freeing(&oi->ip_data_lockres); |
| 1014 | |
| 1015 | /* We very well may get a clear_inode before all an inodes |
| 1016 | * metadata has hit disk. Of course, we can't drop any cluster |
| 1017 | * locks until the journal has finished with it. The only |
| 1018 | * exception here are successfully wiped inodes - their |
| 1019 | * metadata can now be considered to be part of the system |
| 1020 | * inodes from which it came. */ |
| 1021 | if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED)) |
| 1022 | ocfs2_checkpoint_inode(inode); |
| 1023 | |
| 1024 | mlog_bug_on_msg(!list_empty(&oi->ip_io_markers), |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1025 | "Clear inode of %llu, inode has io markers\n", |
| 1026 | (unsigned long long)oi->ip_blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1027 | |
| 1028 | ocfs2_extent_map_drop(inode, 0); |
| 1029 | ocfs2_extent_map_init(inode); |
| 1030 | |
| 1031 | status = ocfs2_drop_inode_locks(inode); |
| 1032 | if (status < 0) |
| 1033 | mlog_errno(status); |
| 1034 | |
| 1035 | ocfs2_lock_res_free(&oi->ip_rw_lockres); |
| 1036 | ocfs2_lock_res_free(&oi->ip_meta_lockres); |
| 1037 | ocfs2_lock_res_free(&oi->ip_data_lockres); |
| 1038 | |
| 1039 | ocfs2_metadata_cache_purge(inode); |
| 1040 | |
| 1041 | mlog_bug_on_msg(oi->ip_metadata_cache.ci_num_cached, |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1042 | "Clear inode of %llu, inode has %u cache items\n", |
| 1043 | (unsigned long long)oi->ip_blkno, oi->ip_metadata_cache.ci_num_cached); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1044 | |
| 1045 | mlog_bug_on_msg(!(oi->ip_flags & OCFS2_INODE_CACHE_INLINE), |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1046 | "Clear inode of %llu, inode has a bad flag\n", |
| 1047 | (unsigned long long)oi->ip_blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1048 | |
| 1049 | mlog_bug_on_msg(spin_is_locked(&oi->ip_lock), |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1050 | "Clear inode of %llu, inode is locked\n", |
| 1051 | (unsigned long long)oi->ip_blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1052 | |
Mark Fasheh | 251b6ec | 2006-01-10 15:41:43 -0800 | [diff] [blame] | 1053 | mlog_bug_on_msg(!mutex_trylock(&oi->ip_io_mutex), |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1054 | "Clear inode of %llu, io_mutex is locked\n", |
| 1055 | (unsigned long long)oi->ip_blkno); |
Mark Fasheh | 251b6ec | 2006-01-10 15:41:43 -0800 | [diff] [blame] | 1056 | mutex_unlock(&oi->ip_io_mutex); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1057 | |
| 1058 | /* |
| 1059 | * down_trylock() returns 0, down_write_trylock() returns 1 |
| 1060 | * kernel 1, world 0 |
| 1061 | */ |
| 1062 | mlog_bug_on_msg(!down_write_trylock(&oi->ip_alloc_sem), |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1063 | "Clear inode of %llu, alloc_sem is locked\n", |
| 1064 | (unsigned long long)oi->ip_blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1065 | up_write(&oi->ip_alloc_sem); |
| 1066 | |
| 1067 | mlog_bug_on_msg(oi->ip_open_count, |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1068 | "Clear inode of %llu has open count %d\n", |
| 1069 | (unsigned long long)oi->ip_blkno, oi->ip_open_count); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1070 | |
| 1071 | /* Clear all other flags. */ |
| 1072 | oi->ip_flags = OCFS2_INODE_CACHE_INLINE; |
| 1073 | oi->ip_created_trans = 0; |
| 1074 | oi->ip_last_trans = 0; |
| 1075 | oi->ip_dir_start_lookup = 0; |
| 1076 | oi->ip_blkno = 0ULL; |
| 1077 | |
| 1078 | bail: |
| 1079 | mlog_exit_void(); |
| 1080 | } |
| 1081 | |
| 1082 | /* Called under inode_lock, with no more references on the |
| 1083 | * struct inode, so it's safe here to check the flags field |
| 1084 | * and to manipulate i_nlink without any other locks. */ |
| 1085 | void ocfs2_drop_inode(struct inode *inode) |
| 1086 | { |
| 1087 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 1088 | |
| 1089 | mlog_entry_void(); |
| 1090 | |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1091 | mlog(0, "Drop inode %llu, nlink = %u, ip_flags = 0x%x\n", |
| 1092 | (unsigned long long)oi->ip_blkno, inode->i_nlink, oi->ip_flags); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1093 | |
| 1094 | /* Testing ip_orphaned_slot here wouldn't work because we may |
| 1095 | * not have gotten a delete_inode vote from any other nodes |
| 1096 | * yet. */ |
Mark Fasheh | 379dfe9 | 2006-09-08 14:21:03 -0700 | [diff] [blame] | 1097 | if (oi->ip_flags & OCFS2_INODE_MAYBE_ORPHANED) |
| 1098 | generic_delete_inode(inode); |
| 1099 | else |
| 1100 | generic_drop_inode(inode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1101 | |
| 1102 | mlog_exit_void(); |
| 1103 | } |
| 1104 | |
| 1105 | /* |
| 1106 | * TODO: this should probably be merged into ocfs2_get_block |
| 1107 | * |
| 1108 | * However, you now need to pay attention to the cont_prepare_write() |
| 1109 | * stuff in ocfs2_get_block (that is, ocfs2_get_block pretty much |
| 1110 | * expects never to extend). |
| 1111 | */ |
| 1112 | struct buffer_head *ocfs2_bread(struct inode *inode, |
| 1113 | int block, int *err, int reada) |
| 1114 | { |
| 1115 | struct buffer_head *bh = NULL; |
| 1116 | int tmperr; |
| 1117 | u64 p_blkno; |
| 1118 | int readflags = OCFS2_BH_CACHED; |
| 1119 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1120 | if (reada) |
| 1121 | readflags |= OCFS2_BH_READAHEAD; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1122 | |
| 1123 | if (((u64)block << inode->i_sb->s_blocksize_bits) >= |
| 1124 | i_size_read(inode)) { |
| 1125 | BUG_ON(!reada); |
| 1126 | return NULL; |
| 1127 | } |
| 1128 | |
| 1129 | tmperr = ocfs2_extent_map_get_blocks(inode, block, 1, |
| 1130 | &p_blkno, NULL); |
| 1131 | if (tmperr < 0) { |
| 1132 | mlog_errno(tmperr); |
| 1133 | goto fail; |
| 1134 | } |
| 1135 | |
| 1136 | tmperr = ocfs2_read_block(OCFS2_SB(inode->i_sb), p_blkno, &bh, |
| 1137 | readflags, inode); |
| 1138 | if (tmperr < 0) |
| 1139 | goto fail; |
| 1140 | |
| 1141 | tmperr = 0; |
| 1142 | |
| 1143 | *err = 0; |
| 1144 | return bh; |
| 1145 | |
| 1146 | fail: |
| 1147 | if (bh) { |
| 1148 | brelse(bh); |
| 1149 | bh = NULL; |
| 1150 | } |
| 1151 | *err = -EIO; |
| 1152 | return NULL; |
| 1153 | } |
| 1154 | |
| 1155 | /* |
| 1156 | * This is called from our getattr. |
| 1157 | */ |
| 1158 | int ocfs2_inode_revalidate(struct dentry *dentry) |
| 1159 | { |
| 1160 | struct inode *inode = dentry->d_inode; |
| 1161 | int status = 0; |
| 1162 | |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1163 | mlog_entry("(inode = 0x%p, ino = %llu)\n", inode, |
| 1164 | inode ? (unsigned long long)OCFS2_I(inode)->ip_blkno : 0ULL); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1165 | |
| 1166 | if (!inode) { |
| 1167 | mlog(0, "eep, no inode!\n"); |
| 1168 | status = -ENOENT; |
| 1169 | goto bail; |
| 1170 | } |
| 1171 | |
| 1172 | spin_lock(&OCFS2_I(inode)->ip_lock); |
| 1173 | if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) { |
| 1174 | spin_unlock(&OCFS2_I(inode)->ip_lock); |
| 1175 | mlog(0, "inode deleted!\n"); |
| 1176 | status = -ENOENT; |
| 1177 | goto bail; |
| 1178 | } |
| 1179 | spin_unlock(&OCFS2_I(inode)->ip_lock); |
| 1180 | |
| 1181 | /* Let ocfs2_meta_lock do the work of updating our struct |
| 1182 | * inode for us. */ |
Mark Fasheh | 4bcec18 | 2006-10-09 16:02:40 -0700 | [diff] [blame^] | 1183 | status = ocfs2_meta_lock(inode, NULL, 0); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1184 | if (status < 0) { |
| 1185 | if (status != -ENOENT) |
| 1186 | mlog_errno(status); |
| 1187 | goto bail; |
| 1188 | } |
| 1189 | ocfs2_meta_unlock(inode, 0); |
| 1190 | bail: |
| 1191 | mlog_exit(status); |
| 1192 | |
| 1193 | return status; |
| 1194 | } |
| 1195 | |
| 1196 | /* |
| 1197 | * Updates a disk inode from a |
| 1198 | * struct inode. |
| 1199 | * Only takes ip_lock. |
| 1200 | */ |
| 1201 | int ocfs2_mark_inode_dirty(struct ocfs2_journal_handle *handle, |
| 1202 | struct inode *inode, |
| 1203 | struct buffer_head *bh) |
| 1204 | { |
| 1205 | int status; |
| 1206 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data; |
| 1207 | |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1208 | mlog_entry("(inode %llu)\n", |
| 1209 | (unsigned long long)OCFS2_I(inode)->ip_blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1210 | |
| 1211 | status = ocfs2_journal_access(handle, inode, bh, |
| 1212 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 1213 | if (status < 0) { |
| 1214 | mlog_errno(status); |
| 1215 | goto leave; |
| 1216 | } |
| 1217 | |
| 1218 | spin_lock(&OCFS2_I(inode)->ip_lock); |
| 1219 | fe->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters); |
Herbert Poetzl | ca4d147 | 2006-07-03 17:27:12 -0700 | [diff] [blame] | 1220 | fe->i_attr = cpu_to_le32(OCFS2_I(inode)->ip_attr); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1221 | spin_unlock(&OCFS2_I(inode)->ip_lock); |
| 1222 | |
| 1223 | fe->i_size = cpu_to_le64(i_size_read(inode)); |
| 1224 | fe->i_links_count = cpu_to_le16(inode->i_nlink); |
| 1225 | fe->i_uid = cpu_to_le32(inode->i_uid); |
| 1226 | fe->i_gid = cpu_to_le32(inode->i_gid); |
| 1227 | fe->i_mode = cpu_to_le16(inode->i_mode); |
| 1228 | fe->i_atime = cpu_to_le64(inode->i_atime.tv_sec); |
| 1229 | fe->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); |
| 1230 | fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); |
| 1231 | fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); |
| 1232 | fe->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec); |
| 1233 | fe->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); |
| 1234 | |
| 1235 | status = ocfs2_journal_dirty(handle, bh); |
| 1236 | if (status < 0) |
| 1237 | mlog_errno(status); |
| 1238 | |
| 1239 | status = 0; |
| 1240 | leave: |
| 1241 | |
| 1242 | mlog_exit(status); |
| 1243 | return status; |
| 1244 | } |
| 1245 | |
| 1246 | /* |
| 1247 | * |
| 1248 | * Updates a struct inode from a disk inode. |
| 1249 | * does no i/o, only takes ip_lock. |
| 1250 | */ |
| 1251 | void ocfs2_refresh_inode(struct inode *inode, |
| 1252 | struct ocfs2_dinode *fe) |
| 1253 | { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1254 | spin_lock(&OCFS2_I(inode)->ip_lock); |
| 1255 | |
| 1256 | OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters); |
Herbert Poetzl | ca4d147 | 2006-07-03 17:27:12 -0700 | [diff] [blame] | 1257 | OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr); |
| 1258 | ocfs2_set_inode_flags(inode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1259 | i_size_write(inode, le64_to_cpu(fe->i_size)); |
| 1260 | inode->i_nlink = le16_to_cpu(fe->i_links_count); |
| 1261 | inode->i_uid = le32_to_cpu(fe->i_uid); |
| 1262 | inode->i_gid = le32_to_cpu(fe->i_gid); |
| 1263 | inode->i_mode = le16_to_cpu(fe->i_mode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1264 | if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0) |
| 1265 | inode->i_blocks = 0; |
| 1266 | else |
| 1267 | inode->i_blocks = ocfs2_align_bytes_to_sectors(i_size_read(inode)); |
| 1268 | inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime); |
| 1269 | inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec); |
| 1270 | inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime); |
| 1271 | inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec); |
| 1272 | inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime); |
| 1273 | inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec); |
| 1274 | |
| 1275 | spin_unlock(&OCFS2_I(inode)->ip_lock); |
| 1276 | } |