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 | * suballoc.c |
| 5 | * |
| 6 | * metadata alloc and free |
| 7 | * Inspired by ext3 block groups. |
| 8 | * |
| 9 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or |
| 12 | * modify it under the terms of the GNU General Public |
| 13 | * License as published by the Free Software Foundation; either |
| 14 | * version 2 of the License, or (at your option) any later version. |
| 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. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public |
| 22 | * License along with this program; if not, write to the |
| 23 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 24 | * Boston, MA 021110-1307, USA. |
| 25 | */ |
| 26 | |
| 27 | #include <linux/fs.h> |
| 28 | #include <linux/types.h> |
| 29 | #include <linux/slab.h> |
| 30 | #include <linux/highmem.h> |
| 31 | |
| 32 | #define MLOG_MASK_PREFIX ML_DISK_ALLOC |
| 33 | #include <cluster/masklog.h> |
| 34 | |
| 35 | #include "ocfs2.h" |
| 36 | |
| 37 | #include "alloc.h" |
Joel Becker | d6b32bb | 2008-10-17 14:55:01 -0700 | [diff] [blame] | 38 | #include "blockcheck.h" |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 39 | #include "dlmglue.h" |
| 40 | #include "inode.h" |
| 41 | #include "journal.h" |
| 42 | #include "localalloc.h" |
| 43 | #include "suballoc.h" |
| 44 | #include "super.h" |
| 45 | #include "sysfile.h" |
| 46 | #include "uptodate.h" |
| 47 | |
| 48 | #include "buffer_head_io.h" |
| 49 | |
Tao Ma | ffda89a | 2008-03-03 17:12:09 +0800 | [diff] [blame] | 50 | #define NOT_ALLOC_NEW_GROUP 0 |
Tao Ma | 60ca81e | 2009-02-25 00:53:24 +0800 | [diff] [blame] | 51 | #define ALLOC_NEW_GROUP 0x1 |
| 52 | #define ALLOC_GROUPS_FROM_GLOBAL 0x2 |
Tao Ma | ffda89a | 2008-03-03 17:12:09 +0800 | [diff] [blame] | 53 | |
Tiger Yang | b89c542 | 2010-01-25 14:11:06 +0800 | [diff] [blame^] | 54 | #define OCFS2_MAX_TO_STEAL 1024 |
Tao Ma | 4d0ddb2 | 2008-03-05 16:11:46 +0800 | [diff] [blame] | 55 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 56 | static inline void ocfs2_debug_bg(struct ocfs2_group_desc *bg); |
| 57 | static inline void ocfs2_debug_suballoc_inode(struct ocfs2_dinode *fe); |
| 58 | static inline u16 ocfs2_find_victim_chain(struct ocfs2_chain_list *cl); |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 59 | static int ocfs2_block_group_fill(handle_t *handle, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 60 | struct inode *alloc_inode, |
| 61 | struct buffer_head *bg_bh, |
| 62 | u64 group_blkno, |
| 63 | u16 my_chain, |
| 64 | struct ocfs2_chain_list *cl); |
| 65 | static int ocfs2_block_group_alloc(struct ocfs2_super *osb, |
| 66 | struct inode *alloc_inode, |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 67 | struct buffer_head *bh, |
Tao Ma | 60ca81e | 2009-02-25 00:53:24 +0800 | [diff] [blame] | 68 | u64 max_block, |
Tao Ma | feb473a | 2009-02-25 00:53:25 +0800 | [diff] [blame] | 69 | u64 *last_alloc_group, |
Tao Ma | 60ca81e | 2009-02-25 00:53:24 +0800 | [diff] [blame] | 70 | int flags); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 71 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 72 | static int ocfs2_cluster_group_search(struct inode *inode, |
| 73 | struct buffer_head *group_bh, |
| 74 | u32 bits_wanted, u32 min_bits, |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 75 | u64 max_block, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 76 | u16 *bit_off, u16 *bits_found); |
| 77 | static int ocfs2_block_group_search(struct inode *inode, |
| 78 | struct buffer_head *group_bh, |
| 79 | u32 bits_wanted, u32 min_bits, |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 80 | u64 max_block, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 81 | u16 *bit_off, u16 *bits_found); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 82 | static int ocfs2_claim_suballoc_bits(struct ocfs2_super *osb, |
| 83 | struct ocfs2_alloc_context *ac, |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 84 | handle_t *handle, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 85 | u32 bits_wanted, |
| 86 | u32 min_bits, |
| 87 | u16 *bit_off, |
| 88 | unsigned int *num_bits, |
| 89 | u64 *bg_blkno); |
| 90 | static int ocfs2_test_bg_bit_allocatable(struct buffer_head *bg_bh, |
| 91 | int nr); |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 92 | static inline int ocfs2_block_group_set_bits(handle_t *handle, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 93 | struct inode *alloc_inode, |
| 94 | struct ocfs2_group_desc *bg, |
| 95 | struct buffer_head *group_bh, |
| 96 | unsigned int bit_off, |
| 97 | unsigned int num_bits); |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 98 | static inline int ocfs2_block_group_clear_bits(handle_t *handle, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 99 | struct inode *alloc_inode, |
| 100 | struct ocfs2_group_desc *bg, |
| 101 | struct buffer_head *group_bh, |
| 102 | unsigned int bit_off, |
| 103 | unsigned int num_bits); |
| 104 | |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 105 | static int ocfs2_relink_block_group(handle_t *handle, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 106 | struct inode *alloc_inode, |
| 107 | struct buffer_head *fe_bh, |
| 108 | struct buffer_head *bg_bh, |
| 109 | struct buffer_head *prev_bg_bh, |
| 110 | u16 chain); |
| 111 | static inline int ocfs2_block_group_reasonably_empty(struct ocfs2_group_desc *bg, |
| 112 | u32 wanted); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 113 | static inline u32 ocfs2_desc_bitmap_to_cluster_off(struct inode *inode, |
| 114 | u64 bg_blkno, |
| 115 | u16 bg_bit_off); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 116 | static inline void ocfs2_block_to_cluster_group(struct inode *inode, |
| 117 | u64 data_blkno, |
| 118 | u64 *bg_blkno, |
| 119 | u16 *bg_bit_off); |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 120 | static int ocfs2_reserve_clusters_with_limit(struct ocfs2_super *osb, |
| 121 | u32 bits_wanted, u64 max_block, |
Tao Ma | 60ca81e | 2009-02-25 00:53:24 +0800 | [diff] [blame] | 122 | int flags, |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 123 | struct ocfs2_alloc_context **ac); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 124 | |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 125 | void ocfs2_free_ac_resource(struct ocfs2_alloc_context *ac) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 126 | { |
Mark Fasheh | da5cbf2 | 2006-10-06 18:34:35 -0700 | [diff] [blame] | 127 | struct inode *inode = ac->ac_inode; |
| 128 | |
| 129 | if (inode) { |
| 130 | if (ac->ac_which != OCFS2_AC_USE_LOCAL) |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 131 | ocfs2_inode_unlock(inode, 1); |
Mark Fasheh | da5cbf2 | 2006-10-06 18:34:35 -0700 | [diff] [blame] | 132 | |
| 133 | mutex_unlock(&inode->i_mutex); |
| 134 | |
| 135 | iput(inode); |
Tao Ma | 4d0ddb2 | 2008-03-05 16:11:46 +0800 | [diff] [blame] | 136 | ac->ac_inode = NULL; |
Mark Fasheh | da5cbf2 | 2006-10-06 18:34:35 -0700 | [diff] [blame] | 137 | } |
Mark Fasheh | a81cb88 | 2008-10-07 14:25:16 -0700 | [diff] [blame] | 138 | brelse(ac->ac_bh); |
| 139 | ac->ac_bh = NULL; |
Tao Ma | 4d0ddb2 | 2008-03-05 16:11:46 +0800 | [diff] [blame] | 140 | } |
| 141 | |
| 142 | void ocfs2_free_alloc_context(struct ocfs2_alloc_context *ac) |
| 143 | { |
| 144 | ocfs2_free_ac_resource(ac); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 145 | kfree(ac); |
| 146 | } |
| 147 | |
| 148 | static u32 ocfs2_bits_per_group(struct ocfs2_chain_list *cl) |
| 149 | { |
| 150 | return (u32)le16_to_cpu(cl->cl_cpg) * (u32)le16_to_cpu(cl->cl_bpc); |
| 151 | } |
| 152 | |
Joel Becker | 57e3e79 | 2008-11-13 14:49:13 -0800 | [diff] [blame] | 153 | #define do_error(fmt, ...) \ |
| 154 | do{ \ |
| 155 | if (clean_error) \ |
| 156 | mlog(ML_ERROR, fmt "\n", ##__VA_ARGS__); \ |
| 157 | else \ |
| 158 | ocfs2_error(sb, fmt, ##__VA_ARGS__); \ |
| 159 | } while (0) |
| 160 | |
Joel Becker | 970e493 | 2008-11-13 14:49:19 -0800 | [diff] [blame] | 161 | static int ocfs2_validate_gd_self(struct super_block *sb, |
| 162 | struct buffer_head *bh, |
| 163 | int clean_error) |
| 164 | { |
| 165 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; |
| 166 | |
Mark Fasheh | 7bf72ed | 2006-05-03 17:46:50 -0700 | [diff] [blame] | 167 | if (!OCFS2_IS_VALID_GROUP_DESC(gd)) { |
Joel Becker | 68f64d4 | 2008-11-13 14:49:14 -0800 | [diff] [blame] | 168 | do_error("Group descriptor #%llu has bad signature %.*s", |
| 169 | (unsigned long long)bh->b_blocknr, 7, |
Joel Becker | 57e3e79 | 2008-11-13 14:49:13 -0800 | [diff] [blame] | 170 | gd->bg_signature); |
| 171 | return -EINVAL; |
Mark Fasheh | 7bf72ed | 2006-05-03 17:46:50 -0700 | [diff] [blame] | 172 | } |
| 173 | |
Joel Becker | 68f64d4 | 2008-11-13 14:49:14 -0800 | [diff] [blame] | 174 | if (le64_to_cpu(gd->bg_blkno) != bh->b_blocknr) { |
| 175 | do_error("Group descriptor #%llu has an invalid bg_blkno " |
| 176 | "of %llu", |
| 177 | (unsigned long long)bh->b_blocknr, |
| 178 | (unsigned long long)le64_to_cpu(gd->bg_blkno)); |
| 179 | return -EINVAL; |
| 180 | } |
| 181 | |
| 182 | if (le32_to_cpu(gd->bg_generation) != OCFS2_SB(sb)->fs_generation) { |
| 183 | do_error("Group descriptor #%llu has an invalid " |
| 184 | "fs_generation of #%u", |
| 185 | (unsigned long long)bh->b_blocknr, |
| 186 | le32_to_cpu(gd->bg_generation)); |
| 187 | return -EINVAL; |
| 188 | } |
| 189 | |
Joel Becker | 970e493 | 2008-11-13 14:49:19 -0800 | [diff] [blame] | 190 | if (le16_to_cpu(gd->bg_free_bits_count) > le16_to_cpu(gd->bg_bits)) { |
| 191 | do_error("Group descriptor #%llu has bit count %u but " |
| 192 | "claims that %u are free", |
| 193 | (unsigned long long)bh->b_blocknr, |
| 194 | le16_to_cpu(gd->bg_bits), |
| 195 | le16_to_cpu(gd->bg_free_bits_count)); |
| 196 | return -EINVAL; |
| 197 | } |
| 198 | |
| 199 | if (le16_to_cpu(gd->bg_bits) > (8 * le16_to_cpu(gd->bg_size))) { |
| 200 | do_error("Group descriptor #%llu has bit count %u but " |
| 201 | "max bitmap bits of %u", |
| 202 | (unsigned long long)bh->b_blocknr, |
| 203 | le16_to_cpu(gd->bg_bits), |
| 204 | 8 * le16_to_cpu(gd->bg_size)); |
| 205 | return -EINVAL; |
| 206 | } |
| 207 | |
| 208 | return 0; |
| 209 | } |
| 210 | |
| 211 | static int ocfs2_validate_gd_parent(struct super_block *sb, |
| 212 | struct ocfs2_dinode *di, |
| 213 | struct buffer_head *bh, |
| 214 | int clean_error) |
| 215 | { |
| 216 | unsigned int max_bits; |
| 217 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; |
| 218 | |
Mark Fasheh | 7bf72ed | 2006-05-03 17:46:50 -0700 | [diff] [blame] | 219 | if (di->i_blkno != gd->bg_parent_dinode) { |
Joel Becker | 68f64d4 | 2008-11-13 14:49:14 -0800 | [diff] [blame] | 220 | do_error("Group descriptor #%llu has bad parent " |
Joel Becker | 57e3e79 | 2008-11-13 14:49:13 -0800 | [diff] [blame] | 221 | "pointer (%llu, expected %llu)", |
Joel Becker | 68f64d4 | 2008-11-13 14:49:14 -0800 | [diff] [blame] | 222 | (unsigned long long)bh->b_blocknr, |
Joel Becker | 57e3e79 | 2008-11-13 14:49:13 -0800 | [diff] [blame] | 223 | (unsigned long long)le64_to_cpu(gd->bg_parent_dinode), |
| 224 | (unsigned long long)le64_to_cpu(di->i_blkno)); |
| 225 | return -EINVAL; |
Mark Fasheh | 7bf72ed | 2006-05-03 17:46:50 -0700 | [diff] [blame] | 226 | } |
| 227 | |
| 228 | max_bits = le16_to_cpu(di->id2.i_chain.cl_cpg) * le16_to_cpu(di->id2.i_chain.cl_bpc); |
| 229 | if (le16_to_cpu(gd->bg_bits) > max_bits) { |
Joel Becker | 68f64d4 | 2008-11-13 14:49:14 -0800 | [diff] [blame] | 230 | do_error("Group descriptor #%llu has bit count of %u", |
| 231 | (unsigned long long)bh->b_blocknr, |
Joel Becker | 57e3e79 | 2008-11-13 14:49:13 -0800 | [diff] [blame] | 232 | le16_to_cpu(gd->bg_bits)); |
| 233 | return -EINVAL; |
Mark Fasheh | 7bf72ed | 2006-05-03 17:46:50 -0700 | [diff] [blame] | 234 | } |
| 235 | |
| 236 | if (le16_to_cpu(gd->bg_chain) >= |
| 237 | le16_to_cpu(di->id2.i_chain.cl_next_free_rec)) { |
Joel Becker | 68f64d4 | 2008-11-13 14:49:14 -0800 | [diff] [blame] | 238 | do_error("Group descriptor #%llu has bad chain %u", |
| 239 | (unsigned long long)bh->b_blocknr, |
Joel Becker | 57e3e79 | 2008-11-13 14:49:13 -0800 | [diff] [blame] | 240 | le16_to_cpu(gd->bg_chain)); |
| 241 | return -EINVAL; |
Mark Fasheh | 7bf72ed | 2006-05-03 17:46:50 -0700 | [diff] [blame] | 242 | } |
| 243 | |
Joel Becker | 970e493 | 2008-11-13 14:49:19 -0800 | [diff] [blame] | 244 | return 0; |
| 245 | } |
Mark Fasheh | 7bf72ed | 2006-05-03 17:46:50 -0700 | [diff] [blame] | 246 | |
Joel Becker | 57e3e79 | 2008-11-13 14:49:13 -0800 | [diff] [blame] | 247 | #undef do_error |
Mark Fasheh | 7bf72ed | 2006-05-03 17:46:50 -0700 | [diff] [blame] | 248 | |
Joel Becker | 970e493 | 2008-11-13 14:49:19 -0800 | [diff] [blame] | 249 | /* |
| 250 | * This version only prints errors. It does not fail the filesystem, and |
| 251 | * exists only for resize. |
| 252 | */ |
| 253 | int ocfs2_check_group_descriptor(struct super_block *sb, |
| 254 | struct ocfs2_dinode *di, |
| 255 | struct buffer_head *bh) |
| 256 | { |
| 257 | int rc; |
Joel Becker | d6b32bb | 2008-10-17 14:55:01 -0700 | [diff] [blame] | 258 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; |
Joel Becker | 970e493 | 2008-11-13 14:49:19 -0800 | [diff] [blame] | 259 | |
Joel Becker | d6b32bb | 2008-10-17 14:55:01 -0700 | [diff] [blame] | 260 | BUG_ON(!buffer_uptodate(bh)); |
| 261 | |
| 262 | /* |
| 263 | * If the ecc fails, we return the error but otherwise |
| 264 | * leave the filesystem running. We know any error is |
| 265 | * local to this block. |
| 266 | */ |
| 267 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &gd->bg_check); |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 268 | if (rc) { |
| 269 | mlog(ML_ERROR, |
| 270 | "Checksum failed for group descriptor %llu\n", |
| 271 | (unsigned long long)bh->b_blocknr); |
| 272 | } else |
Joel Becker | d6b32bb | 2008-10-17 14:55:01 -0700 | [diff] [blame] | 273 | rc = ocfs2_validate_gd_self(sb, bh, 1); |
Joel Becker | 970e493 | 2008-11-13 14:49:19 -0800 | [diff] [blame] | 274 | if (!rc) |
| 275 | rc = ocfs2_validate_gd_parent(sb, di, bh, 1); |
| 276 | |
| 277 | return rc; |
| 278 | } |
| 279 | |
| 280 | static int ocfs2_validate_group_descriptor(struct super_block *sb, |
| 281 | struct buffer_head *bh) |
| 282 | { |
Joel Becker | d6b32bb | 2008-10-17 14:55:01 -0700 | [diff] [blame] | 283 | int rc; |
| 284 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; |
| 285 | |
Joel Becker | 970e493 | 2008-11-13 14:49:19 -0800 | [diff] [blame] | 286 | mlog(0, "Validating group descriptor %llu\n", |
| 287 | (unsigned long long)bh->b_blocknr); |
| 288 | |
Joel Becker | d6b32bb | 2008-10-17 14:55:01 -0700 | [diff] [blame] | 289 | BUG_ON(!buffer_uptodate(bh)); |
| 290 | |
| 291 | /* |
| 292 | * If the ecc fails, we return the error but otherwise |
| 293 | * leave the filesystem running. We know any error is |
| 294 | * local to this block. |
| 295 | */ |
| 296 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &gd->bg_check); |
| 297 | if (rc) |
| 298 | return rc; |
| 299 | |
| 300 | /* |
| 301 | * Errors after here are fatal. |
| 302 | */ |
| 303 | |
Joel Becker | 970e493 | 2008-11-13 14:49:19 -0800 | [diff] [blame] | 304 | return ocfs2_validate_gd_self(sb, bh, 0); |
Mark Fasheh | 7bf72ed | 2006-05-03 17:46:50 -0700 | [diff] [blame] | 305 | } |
| 306 | |
Joel Becker | 68f64d4 | 2008-11-13 14:49:14 -0800 | [diff] [blame] | 307 | int ocfs2_read_group_descriptor(struct inode *inode, struct ocfs2_dinode *di, |
| 308 | u64 gd_blkno, struct buffer_head **bh) |
| 309 | { |
| 310 | int rc; |
| 311 | struct buffer_head *tmp = *bh; |
| 312 | |
Joel Becker | 8cb471e | 2009-02-10 20:00:41 -0800 | [diff] [blame] | 313 | rc = ocfs2_read_block(INODE_CACHE(inode), gd_blkno, &tmp, |
Joel Becker | 970e493 | 2008-11-13 14:49:19 -0800 | [diff] [blame] | 314 | ocfs2_validate_group_descriptor); |
Joel Becker | 68f64d4 | 2008-11-13 14:49:14 -0800 | [diff] [blame] | 315 | if (rc) |
| 316 | goto out; |
| 317 | |
Joel Becker | 970e493 | 2008-11-13 14:49:19 -0800 | [diff] [blame] | 318 | rc = ocfs2_validate_gd_parent(inode->i_sb, di, tmp, 0); |
Joel Becker | 68f64d4 | 2008-11-13 14:49:14 -0800 | [diff] [blame] | 319 | if (rc) { |
| 320 | brelse(tmp); |
| 321 | goto out; |
| 322 | } |
| 323 | |
| 324 | /* If ocfs2_read_block() got us a new bh, pass it up. */ |
| 325 | if (!*bh) |
| 326 | *bh = tmp; |
| 327 | |
| 328 | out: |
| 329 | return rc; |
| 330 | } |
| 331 | |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 332 | static int ocfs2_block_group_fill(handle_t *handle, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 333 | struct inode *alloc_inode, |
| 334 | struct buffer_head *bg_bh, |
| 335 | u64 group_blkno, |
| 336 | u16 my_chain, |
| 337 | struct ocfs2_chain_list *cl) |
| 338 | { |
| 339 | int status = 0; |
| 340 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; |
| 341 | struct super_block * sb = alloc_inode->i_sb; |
| 342 | |
| 343 | mlog_entry_void(); |
| 344 | |
| 345 | if (((unsigned long long) bg_bh->b_blocknr) != group_blkno) { |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 346 | ocfs2_error(alloc_inode->i_sb, "group block (%llu) != " |
| 347 | "b_blocknr (%llu)", |
| 348 | (unsigned long long)group_blkno, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 349 | (unsigned long long) bg_bh->b_blocknr); |
| 350 | status = -EIO; |
| 351 | goto bail; |
| 352 | } |
| 353 | |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 354 | status = ocfs2_journal_access_gd(handle, |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 355 | INODE_CACHE(alloc_inode), |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 356 | bg_bh, |
| 357 | OCFS2_JOURNAL_ACCESS_CREATE); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 358 | if (status < 0) { |
| 359 | mlog_errno(status); |
| 360 | goto bail; |
| 361 | } |
| 362 | |
| 363 | memset(bg, 0, sb->s_blocksize); |
| 364 | strcpy(bg->bg_signature, OCFS2_GROUP_DESC_SIGNATURE); |
| 365 | bg->bg_generation = cpu_to_le32(OCFS2_SB(sb)->fs_generation); |
| 366 | bg->bg_size = cpu_to_le16(ocfs2_group_bitmap_size(sb)); |
| 367 | bg->bg_bits = cpu_to_le16(ocfs2_bits_per_group(cl)); |
| 368 | bg->bg_chain = cpu_to_le16(my_chain); |
| 369 | bg->bg_next_group = cl->cl_recs[my_chain].c_blkno; |
| 370 | bg->bg_parent_dinode = cpu_to_le64(OCFS2_I(alloc_inode)->ip_blkno); |
| 371 | bg->bg_blkno = cpu_to_le64(group_blkno); |
| 372 | /* set the 1st bit in the bitmap to account for the descriptor block */ |
| 373 | ocfs2_set_bit(0, (unsigned long *)bg->bg_bitmap); |
| 374 | bg->bg_free_bits_count = cpu_to_le16(le16_to_cpu(bg->bg_bits) - 1); |
| 375 | |
| 376 | status = ocfs2_journal_dirty(handle, bg_bh); |
| 377 | if (status < 0) |
| 378 | mlog_errno(status); |
| 379 | |
| 380 | /* There is no need to zero out or otherwise initialize the |
| 381 | * other blocks in a group - All valid FS metadata in a block |
| 382 | * group stores the superblock fs_generation value at |
| 383 | * allocation time. */ |
| 384 | |
| 385 | bail: |
| 386 | mlog_exit(status); |
| 387 | return status; |
| 388 | } |
| 389 | |
| 390 | static inline u16 ocfs2_find_smallest_chain(struct ocfs2_chain_list *cl) |
| 391 | { |
| 392 | u16 curr, best; |
| 393 | |
| 394 | best = curr = 0; |
| 395 | while (curr < le16_to_cpu(cl->cl_count)) { |
| 396 | if (le32_to_cpu(cl->cl_recs[best].c_total) > |
| 397 | le32_to_cpu(cl->cl_recs[curr].c_total)) |
| 398 | best = curr; |
| 399 | curr++; |
| 400 | } |
| 401 | return best; |
| 402 | } |
| 403 | |
| 404 | /* |
| 405 | * We expect the block group allocator to already be locked. |
| 406 | */ |
| 407 | static int ocfs2_block_group_alloc(struct ocfs2_super *osb, |
| 408 | struct inode *alloc_inode, |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 409 | struct buffer_head *bh, |
Tao Ma | 60ca81e | 2009-02-25 00:53:24 +0800 | [diff] [blame] | 410 | u64 max_block, |
Tao Ma | feb473a | 2009-02-25 00:53:25 +0800 | [diff] [blame] | 411 | u64 *last_alloc_group, |
Tao Ma | 60ca81e | 2009-02-25 00:53:24 +0800 | [diff] [blame] | 412 | int flags) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 413 | { |
| 414 | int status, credits; |
| 415 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data; |
| 416 | struct ocfs2_chain_list *cl; |
| 417 | struct ocfs2_alloc_context *ac = NULL; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 418 | handle_t *handle = NULL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 419 | u32 bit_off, num_bits; |
| 420 | u16 alloc_rec; |
| 421 | u64 bg_blkno; |
| 422 | struct buffer_head *bg_bh = NULL; |
| 423 | struct ocfs2_group_desc *bg; |
| 424 | |
| 425 | BUG_ON(ocfs2_is_cluster_bitmap(alloc_inode)); |
| 426 | |
| 427 | mlog_entry_void(); |
| 428 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 429 | cl = &fe->id2.i_chain; |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 430 | status = ocfs2_reserve_clusters_with_limit(osb, |
| 431 | le16_to_cpu(cl->cl_cpg), |
Tao Ma | 60ca81e | 2009-02-25 00:53:24 +0800 | [diff] [blame] | 432 | max_block, flags, &ac); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 433 | if (status < 0) { |
| 434 | if (status != -ENOSPC) |
| 435 | mlog_errno(status); |
| 436 | goto bail; |
| 437 | } |
| 438 | |
| 439 | credits = ocfs2_calc_group_alloc_credits(osb->sb, |
| 440 | le16_to_cpu(cl->cl_cpg)); |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 441 | handle = ocfs2_start_trans(osb, credits); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 442 | if (IS_ERR(handle)) { |
| 443 | status = PTR_ERR(handle); |
| 444 | handle = NULL; |
| 445 | mlog_errno(status); |
| 446 | goto bail; |
| 447 | } |
| 448 | |
Tao Ma | feb473a | 2009-02-25 00:53:25 +0800 | [diff] [blame] | 449 | if (last_alloc_group && *last_alloc_group != 0) { |
| 450 | mlog(0, "use old allocation group %llu for block group alloc\n", |
| 451 | (unsigned long long)*last_alloc_group); |
| 452 | ac->ac_last_group = *last_alloc_group; |
| 453 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 454 | status = ocfs2_claim_clusters(osb, |
| 455 | handle, |
| 456 | ac, |
| 457 | le16_to_cpu(cl->cl_cpg), |
| 458 | &bit_off, |
| 459 | &num_bits); |
| 460 | if (status < 0) { |
| 461 | if (status != -ENOSPC) |
| 462 | mlog_errno(status); |
| 463 | goto bail; |
| 464 | } |
| 465 | |
| 466 | alloc_rec = ocfs2_find_smallest_chain(cl); |
| 467 | |
| 468 | /* setup the group */ |
| 469 | bg_blkno = ocfs2_clusters_to_blocks(osb->sb, bit_off); |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 470 | mlog(0, "new descriptor, record %u, at block %llu\n", |
| 471 | alloc_rec, (unsigned long long)bg_blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 472 | |
| 473 | bg_bh = sb_getblk(osb->sb, bg_blkno); |
| 474 | if (!bg_bh) { |
| 475 | status = -EIO; |
| 476 | mlog_errno(status); |
| 477 | goto bail; |
| 478 | } |
Joel Becker | 8cb471e | 2009-02-10 20:00:41 -0800 | [diff] [blame] | 479 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(alloc_inode), bg_bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 480 | |
| 481 | status = ocfs2_block_group_fill(handle, |
| 482 | alloc_inode, |
| 483 | bg_bh, |
| 484 | bg_blkno, |
| 485 | alloc_rec, |
| 486 | cl); |
| 487 | if (status < 0) { |
| 488 | mlog_errno(status); |
| 489 | goto bail; |
| 490 | } |
| 491 | |
| 492 | bg = (struct ocfs2_group_desc *) bg_bh->b_data; |
| 493 | |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 494 | status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 495 | bh, OCFS2_JOURNAL_ACCESS_WRITE); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 496 | if (status < 0) { |
| 497 | mlog_errno(status); |
| 498 | goto bail; |
| 499 | } |
| 500 | |
| 501 | le32_add_cpu(&cl->cl_recs[alloc_rec].c_free, |
| 502 | le16_to_cpu(bg->bg_free_bits_count)); |
| 503 | le32_add_cpu(&cl->cl_recs[alloc_rec].c_total, le16_to_cpu(bg->bg_bits)); |
| 504 | cl->cl_recs[alloc_rec].c_blkno = cpu_to_le64(bg_blkno); |
| 505 | if (le16_to_cpu(cl->cl_next_free_rec) < le16_to_cpu(cl->cl_count)) |
| 506 | le16_add_cpu(&cl->cl_next_free_rec, 1); |
| 507 | |
| 508 | le32_add_cpu(&fe->id1.bitmap1.i_used, le16_to_cpu(bg->bg_bits) - |
| 509 | le16_to_cpu(bg->bg_free_bits_count)); |
| 510 | le32_add_cpu(&fe->id1.bitmap1.i_total, le16_to_cpu(bg->bg_bits)); |
| 511 | le32_add_cpu(&fe->i_clusters, le16_to_cpu(cl->cl_cpg)); |
| 512 | |
| 513 | status = ocfs2_journal_dirty(handle, bh); |
| 514 | if (status < 0) { |
| 515 | mlog_errno(status); |
| 516 | goto bail; |
| 517 | } |
| 518 | |
| 519 | spin_lock(&OCFS2_I(alloc_inode)->ip_lock); |
| 520 | OCFS2_I(alloc_inode)->ip_clusters = le32_to_cpu(fe->i_clusters); |
| 521 | fe->i_size = cpu_to_le64(ocfs2_clusters_to_bytes(alloc_inode->i_sb, |
| 522 | le32_to_cpu(fe->i_clusters))); |
| 523 | spin_unlock(&OCFS2_I(alloc_inode)->ip_lock); |
| 524 | i_size_write(alloc_inode, le64_to_cpu(fe->i_size)); |
Mark Fasheh | 8110b07 | 2007-03-22 16:53:23 -0700 | [diff] [blame] | 525 | alloc_inode->i_blocks = ocfs2_inode_sector_count(alloc_inode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 526 | |
| 527 | status = 0; |
Tao Ma | feb473a | 2009-02-25 00:53:25 +0800 | [diff] [blame] | 528 | |
| 529 | /* save the new last alloc group so that the caller can cache it. */ |
| 530 | if (last_alloc_group) |
| 531 | *last_alloc_group = ac->ac_last_group; |
| 532 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 533 | bail: |
| 534 | if (handle) |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 535 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 536 | |
| 537 | if (ac) |
| 538 | ocfs2_free_alloc_context(ac); |
| 539 | |
Mark Fasheh | a81cb88 | 2008-10-07 14:25:16 -0700 | [diff] [blame] | 540 | brelse(bg_bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 541 | |
| 542 | mlog_exit(status); |
| 543 | return status; |
| 544 | } |
| 545 | |
| 546 | static int ocfs2_reserve_suballoc_bits(struct ocfs2_super *osb, |
Mark Fasheh | da5cbf2 | 2006-10-06 18:34:35 -0700 | [diff] [blame] | 547 | struct ocfs2_alloc_context *ac, |
| 548 | int type, |
Tao Ma | ffda89a | 2008-03-03 17:12:09 +0800 | [diff] [blame] | 549 | u32 slot, |
Tao Ma | feb473a | 2009-02-25 00:53:25 +0800 | [diff] [blame] | 550 | u64 *last_alloc_group, |
Tao Ma | 60ca81e | 2009-02-25 00:53:24 +0800 | [diff] [blame] | 551 | int flags) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 552 | { |
| 553 | int status; |
| 554 | u32 bits_wanted = ac->ac_bits_wanted; |
Mark Fasheh | da5cbf2 | 2006-10-06 18:34:35 -0700 | [diff] [blame] | 555 | struct inode *alloc_inode; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 556 | struct buffer_head *bh = NULL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 557 | struct ocfs2_dinode *fe; |
| 558 | u32 free_bits; |
| 559 | |
| 560 | mlog_entry_void(); |
| 561 | |
Mark Fasheh | da5cbf2 | 2006-10-06 18:34:35 -0700 | [diff] [blame] | 562 | alloc_inode = ocfs2_get_system_file_inode(osb, type, slot); |
| 563 | if (!alloc_inode) { |
| 564 | mlog_errno(-EINVAL); |
| 565 | return -EINVAL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 566 | } |
| 567 | |
Mark Fasheh | da5cbf2 | 2006-10-06 18:34:35 -0700 | [diff] [blame] | 568 | mutex_lock(&alloc_inode->i_mutex); |
| 569 | |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 570 | status = ocfs2_inode_lock(alloc_inode, &bh, 1); |
Mark Fasheh | da5cbf2 | 2006-10-06 18:34:35 -0700 | [diff] [blame] | 571 | if (status < 0) { |
| 572 | mutex_unlock(&alloc_inode->i_mutex); |
| 573 | iput(alloc_inode); |
| 574 | |
| 575 | mlog_errno(status); |
| 576 | return status; |
| 577 | } |
| 578 | |
| 579 | ac->ac_inode = alloc_inode; |
Tao Ma | a4a4891 | 2008-03-03 17:12:30 +0800 | [diff] [blame] | 580 | ac->ac_alloc_slot = slot; |
Mark Fasheh | da5cbf2 | 2006-10-06 18:34:35 -0700 | [diff] [blame] | 581 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 582 | fe = (struct ocfs2_dinode *) bh->b_data; |
Joel Becker | 10995aa | 2008-11-13 14:49:12 -0800 | [diff] [blame] | 583 | |
| 584 | /* The bh was validated by the inode read inside |
| 585 | * ocfs2_inode_lock(). Any corruption is a code bug. */ |
| 586 | BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); |
| 587 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 588 | if (!(fe->i_flags & cpu_to_le32(OCFS2_CHAIN_FL))) { |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 589 | ocfs2_error(alloc_inode->i_sb, "Invalid chain allocator %llu", |
| 590 | (unsigned long long)le64_to_cpu(fe->i_blkno)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 591 | status = -EIO; |
| 592 | goto bail; |
| 593 | } |
| 594 | |
| 595 | free_bits = le32_to_cpu(fe->id1.bitmap1.i_total) - |
| 596 | le32_to_cpu(fe->id1.bitmap1.i_used); |
| 597 | |
| 598 | if (bits_wanted > free_bits) { |
| 599 | /* cluster bitmap never grows */ |
| 600 | if (ocfs2_is_cluster_bitmap(alloc_inode)) { |
| 601 | mlog(0, "Disk Full: wanted=%u, free_bits=%u\n", |
| 602 | bits_wanted, free_bits); |
| 603 | status = -ENOSPC; |
| 604 | goto bail; |
| 605 | } |
| 606 | |
Tao Ma | 60ca81e | 2009-02-25 00:53:24 +0800 | [diff] [blame] | 607 | if (!(flags & ALLOC_NEW_GROUP)) { |
Tao Ma | ffda89a | 2008-03-03 17:12:09 +0800 | [diff] [blame] | 608 | mlog(0, "Alloc File %u Full: wanted=%u, free_bits=%u, " |
| 609 | "and we don't alloc a new group for it.\n", |
| 610 | slot, bits_wanted, free_bits); |
| 611 | status = -ENOSPC; |
| 612 | goto bail; |
| 613 | } |
| 614 | |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 615 | status = ocfs2_block_group_alloc(osb, alloc_inode, bh, |
Tao Ma | feb473a | 2009-02-25 00:53:25 +0800 | [diff] [blame] | 616 | ac->ac_max_block, |
| 617 | last_alloc_group, flags); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 618 | if (status < 0) { |
| 619 | if (status != -ENOSPC) |
| 620 | mlog_errno(status); |
| 621 | goto bail; |
| 622 | } |
| 623 | atomic_inc(&osb->alloc_stats.bg_extends); |
| 624 | |
| 625 | /* You should never ask for this much metadata */ |
| 626 | BUG_ON(bits_wanted > |
| 627 | (le32_to_cpu(fe->id1.bitmap1.i_total) |
| 628 | - le32_to_cpu(fe->id1.bitmap1.i_used))); |
| 629 | } |
| 630 | |
| 631 | get_bh(bh); |
| 632 | ac->ac_bh = bh; |
| 633 | bail: |
Mark Fasheh | a81cb88 | 2008-10-07 14:25:16 -0700 | [diff] [blame] | 634 | brelse(bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 635 | |
| 636 | mlog_exit(status); |
| 637 | return status; |
| 638 | } |
| 639 | |
Tiger Yang | b89c542 | 2010-01-25 14:11:06 +0800 | [diff] [blame^] | 640 | static void ocfs2_init_inode_steal_slot(struct ocfs2_super *osb) |
| 641 | { |
| 642 | spin_lock(&osb->osb_lock); |
| 643 | osb->s_inode_steal_slot = OCFS2_INVALID_SLOT; |
| 644 | spin_unlock(&osb->osb_lock); |
| 645 | atomic_set(&osb->s_num_inodes_stolen, 0); |
| 646 | } |
| 647 | |
| 648 | static void ocfs2_init_meta_steal_slot(struct ocfs2_super *osb) |
| 649 | { |
| 650 | spin_lock(&osb->osb_lock); |
| 651 | osb->s_meta_steal_slot = OCFS2_INVALID_SLOT; |
| 652 | spin_unlock(&osb->osb_lock); |
| 653 | atomic_set(&osb->s_num_meta_stolen, 0); |
| 654 | } |
| 655 | |
| 656 | void ocfs2_init_steal_slots(struct ocfs2_super *osb) |
| 657 | { |
| 658 | ocfs2_init_inode_steal_slot(osb); |
| 659 | ocfs2_init_meta_steal_slot(osb); |
| 660 | } |
| 661 | |
| 662 | static void __ocfs2_set_steal_slot(struct ocfs2_super *osb, int slot, int type) |
| 663 | { |
| 664 | spin_lock(&osb->osb_lock); |
| 665 | if (type == INODE_ALLOC_SYSTEM_INODE) |
| 666 | osb->s_inode_steal_slot = slot; |
| 667 | else if (type == EXTENT_ALLOC_SYSTEM_INODE) |
| 668 | osb->s_meta_steal_slot = slot; |
| 669 | spin_unlock(&osb->osb_lock); |
| 670 | } |
| 671 | |
| 672 | static int __ocfs2_get_steal_slot(struct ocfs2_super *osb, int type) |
| 673 | { |
| 674 | int slot = OCFS2_INVALID_SLOT; |
| 675 | |
| 676 | spin_lock(&osb->osb_lock); |
| 677 | if (type == INODE_ALLOC_SYSTEM_INODE) |
| 678 | slot = osb->s_inode_steal_slot; |
| 679 | else if (type == EXTENT_ALLOC_SYSTEM_INODE) |
| 680 | slot = osb->s_meta_steal_slot; |
| 681 | spin_unlock(&osb->osb_lock); |
| 682 | |
| 683 | return slot; |
| 684 | } |
| 685 | |
| 686 | static int ocfs2_get_inode_steal_slot(struct ocfs2_super *osb) |
| 687 | { |
| 688 | return __ocfs2_get_steal_slot(osb, INODE_ALLOC_SYSTEM_INODE); |
| 689 | } |
| 690 | |
| 691 | static int ocfs2_get_meta_steal_slot(struct ocfs2_super *osb) |
| 692 | { |
| 693 | return __ocfs2_get_steal_slot(osb, EXTENT_ALLOC_SYSTEM_INODE); |
| 694 | } |
| 695 | |
| 696 | static int ocfs2_steal_resource(struct ocfs2_super *osb, |
| 697 | struct ocfs2_alloc_context *ac, |
| 698 | int type) |
| 699 | { |
| 700 | int i, status = -ENOSPC; |
| 701 | int slot = __ocfs2_get_steal_slot(osb, type); |
| 702 | |
| 703 | /* Start to steal resource from the first slot after ours. */ |
| 704 | if (slot == OCFS2_INVALID_SLOT) |
| 705 | slot = osb->slot_num + 1; |
| 706 | |
| 707 | for (i = 0; i < osb->max_slots; i++, slot++) { |
| 708 | if (slot == osb->max_slots) |
| 709 | slot = 0; |
| 710 | |
| 711 | if (slot == osb->slot_num) |
| 712 | continue; |
| 713 | |
| 714 | status = ocfs2_reserve_suballoc_bits(osb, ac, |
| 715 | type, |
| 716 | (u32)slot, NULL, |
| 717 | NOT_ALLOC_NEW_GROUP); |
| 718 | if (status >= 0) { |
| 719 | __ocfs2_set_steal_slot(osb, slot, type); |
| 720 | break; |
| 721 | } |
| 722 | |
| 723 | ocfs2_free_ac_resource(ac); |
| 724 | } |
| 725 | |
| 726 | return status; |
| 727 | } |
| 728 | |
| 729 | static int ocfs2_steal_inode(struct ocfs2_super *osb, |
| 730 | struct ocfs2_alloc_context *ac) |
| 731 | { |
| 732 | return ocfs2_steal_resource(osb, ac, INODE_ALLOC_SYSTEM_INODE); |
| 733 | } |
| 734 | |
| 735 | static int ocfs2_steal_meta(struct ocfs2_super *osb, |
| 736 | struct ocfs2_alloc_context *ac) |
| 737 | { |
| 738 | return ocfs2_steal_resource(osb, ac, EXTENT_ALLOC_SYSTEM_INODE); |
| 739 | } |
| 740 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 741 | int ocfs2_reserve_new_metadata_blocks(struct ocfs2_super *osb, |
| 742 | int blocks, |
| 743 | struct ocfs2_alloc_context **ac) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 744 | { |
| 745 | int status; |
Tiger Yang | b89c542 | 2010-01-25 14:11:06 +0800 | [diff] [blame^] | 746 | int slot = ocfs2_get_meta_steal_slot(osb); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 747 | |
Robert P. J. Day | cd86128 | 2006-12-13 00:34:52 -0800 | [diff] [blame] | 748 | *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 749 | if (!(*ac)) { |
| 750 | status = -ENOMEM; |
| 751 | mlog_errno(status); |
| 752 | goto bail; |
| 753 | } |
| 754 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 755 | (*ac)->ac_bits_wanted = blocks; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 756 | (*ac)->ac_which = OCFS2_AC_USE_META; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 757 | (*ac)->ac_group_search = ocfs2_block_group_search; |
| 758 | |
Tiger Yang | b89c542 | 2010-01-25 14:11:06 +0800 | [diff] [blame^] | 759 | if (slot != OCFS2_INVALID_SLOT && |
| 760 | atomic_read(&osb->s_num_meta_stolen) < OCFS2_MAX_TO_STEAL) |
| 761 | goto extent_steal; |
| 762 | |
| 763 | atomic_set(&osb->s_num_meta_stolen, 0); |
Mark Fasheh | da5cbf2 | 2006-10-06 18:34:35 -0700 | [diff] [blame] | 764 | status = ocfs2_reserve_suballoc_bits(osb, (*ac), |
Tao Ma | ffda89a | 2008-03-03 17:12:09 +0800 | [diff] [blame] | 765 | EXTENT_ALLOC_SYSTEM_INODE, |
Tiger Yang | b89c542 | 2010-01-25 14:11:06 +0800 | [diff] [blame^] | 766 | (u32)osb->slot_num, NULL, |
| 767 | ALLOC_NEW_GROUP); |
| 768 | |
| 769 | |
| 770 | if (status >= 0) { |
| 771 | status = 0; |
| 772 | if (slot != OCFS2_INVALID_SLOT) |
| 773 | ocfs2_init_meta_steal_slot(osb); |
| 774 | goto bail; |
| 775 | } else if (status < 0 && status != -ENOSPC) { |
| 776 | mlog_errno(status); |
| 777 | goto bail; |
| 778 | } |
| 779 | |
| 780 | ocfs2_free_ac_resource(*ac); |
| 781 | |
| 782 | extent_steal: |
| 783 | status = ocfs2_steal_meta(osb, *ac); |
| 784 | atomic_inc(&osb->s_num_meta_stolen); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 785 | if (status < 0) { |
| 786 | if (status != -ENOSPC) |
| 787 | mlog_errno(status); |
| 788 | goto bail; |
| 789 | } |
| 790 | |
| 791 | status = 0; |
| 792 | bail: |
| 793 | if ((status < 0) && *ac) { |
| 794 | ocfs2_free_alloc_context(*ac); |
| 795 | *ac = NULL; |
| 796 | } |
| 797 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 798 | mlog_exit(status); |
| 799 | return status; |
| 800 | } |
| 801 | |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 802 | int ocfs2_reserve_new_metadata(struct ocfs2_super *osb, |
| 803 | struct ocfs2_extent_list *root_el, |
| 804 | struct ocfs2_alloc_context **ac) |
| 805 | { |
| 806 | return ocfs2_reserve_new_metadata_blocks(osb, |
| 807 | ocfs2_extend_meta_needed(root_el), |
| 808 | ac); |
| 809 | } |
| 810 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 811 | int ocfs2_reserve_new_inode(struct ocfs2_super *osb, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 812 | struct ocfs2_alloc_context **ac) |
| 813 | { |
| 814 | int status; |
Tiger Yang | b89c542 | 2010-01-25 14:11:06 +0800 | [diff] [blame^] | 815 | int slot = ocfs2_get_inode_steal_slot(osb); |
Tao Ma | feb473a | 2009-02-25 00:53:25 +0800 | [diff] [blame] | 816 | u64 alloc_group; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 817 | |
Robert P. J. Day | cd86128 | 2006-12-13 00:34:52 -0800 | [diff] [blame] | 818 | *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 819 | if (!(*ac)) { |
| 820 | status = -ENOMEM; |
| 821 | mlog_errno(status); |
| 822 | goto bail; |
| 823 | } |
| 824 | |
| 825 | (*ac)->ac_bits_wanted = 1; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 826 | (*ac)->ac_which = OCFS2_AC_USE_INODE; |
| 827 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 828 | (*ac)->ac_group_search = ocfs2_block_group_search; |
| 829 | |
Tao Ma | 4d0ddb2 | 2008-03-05 16:11:46 +0800 | [diff] [blame] | 830 | /* |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 831 | * stat(2) can't handle i_ino > 32bits, so we tell the |
| 832 | * lower levels not to allocate us a block group past that |
Joel Becker | 12462f1 | 2008-09-03 20:03:40 -0700 | [diff] [blame] | 833 | * limit. The 'inode64' mount option avoids this behavior. |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 834 | */ |
Joel Becker | 12462f1 | 2008-09-03 20:03:40 -0700 | [diff] [blame] | 835 | if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64)) |
| 836 | (*ac)->ac_max_block = (u32)~0U; |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 837 | |
| 838 | /* |
Tao Ma | 4d0ddb2 | 2008-03-05 16:11:46 +0800 | [diff] [blame] | 839 | * slot is set when we successfully steal inode from other nodes. |
| 840 | * It is reset in 3 places: |
| 841 | * 1. when we flush the truncate log |
| 842 | * 2. when we complete local alloc recovery. |
| 843 | * 3. when we successfully allocate from our own slot. |
| 844 | * After it is set, we will go on stealing inodes until we find the |
| 845 | * need to check our slots to see whether there is some space for us. |
| 846 | */ |
| 847 | if (slot != OCFS2_INVALID_SLOT && |
Tiger Yang | b89c542 | 2010-01-25 14:11:06 +0800 | [diff] [blame^] | 848 | atomic_read(&osb->s_num_inodes_stolen) < OCFS2_MAX_TO_STEAL) |
Tao Ma | 4d0ddb2 | 2008-03-05 16:11:46 +0800 | [diff] [blame] | 849 | goto inode_steal; |
| 850 | |
| 851 | atomic_set(&osb->s_num_inodes_stolen, 0); |
Tao Ma | feb473a | 2009-02-25 00:53:25 +0800 | [diff] [blame] | 852 | alloc_group = osb->osb_inode_alloc_group; |
Mark Fasheh | da5cbf2 | 2006-10-06 18:34:35 -0700 | [diff] [blame] | 853 | status = ocfs2_reserve_suballoc_bits(osb, *ac, |
| 854 | INODE_ALLOC_SYSTEM_INODE, |
Tiger Yang | b89c542 | 2010-01-25 14:11:06 +0800 | [diff] [blame^] | 855 | (u32)osb->slot_num, |
Tao Ma | feb473a | 2009-02-25 00:53:25 +0800 | [diff] [blame] | 856 | &alloc_group, |
Tao Ma | 60ca81e | 2009-02-25 00:53:24 +0800 | [diff] [blame] | 857 | ALLOC_NEW_GROUP | |
| 858 | ALLOC_GROUPS_FROM_GLOBAL); |
Tao Ma | 4d0ddb2 | 2008-03-05 16:11:46 +0800 | [diff] [blame] | 859 | if (status >= 0) { |
| 860 | status = 0; |
| 861 | |
Tao Ma | feb473a | 2009-02-25 00:53:25 +0800 | [diff] [blame] | 862 | spin_lock(&osb->osb_lock); |
| 863 | osb->osb_inode_alloc_group = alloc_group; |
| 864 | spin_unlock(&osb->osb_lock); |
| 865 | mlog(0, "after reservation, new allocation group is " |
| 866 | "%llu\n", (unsigned long long)alloc_group); |
| 867 | |
Tao Ma | 4d0ddb2 | 2008-03-05 16:11:46 +0800 | [diff] [blame] | 868 | /* |
| 869 | * Some inodes must be freed by us, so try to allocate |
| 870 | * from our own next time. |
| 871 | */ |
| 872 | if (slot != OCFS2_INVALID_SLOT) |
| 873 | ocfs2_init_inode_steal_slot(osb); |
| 874 | goto bail; |
| 875 | } else if (status < 0 && status != -ENOSPC) { |
| 876 | mlog_errno(status); |
| 877 | goto bail; |
| 878 | } |
| 879 | |
| 880 | ocfs2_free_ac_resource(*ac); |
| 881 | |
| 882 | inode_steal: |
Tiger Yang | b89c542 | 2010-01-25 14:11:06 +0800 | [diff] [blame^] | 883 | status = ocfs2_steal_inode(osb, *ac); |
Tao Ma | 4d0ddb2 | 2008-03-05 16:11:46 +0800 | [diff] [blame] | 884 | atomic_inc(&osb->s_num_inodes_stolen); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 885 | if (status < 0) { |
| 886 | if (status != -ENOSPC) |
| 887 | mlog_errno(status); |
| 888 | goto bail; |
| 889 | } |
| 890 | |
| 891 | status = 0; |
| 892 | bail: |
| 893 | if ((status < 0) && *ac) { |
| 894 | ocfs2_free_alloc_context(*ac); |
| 895 | *ac = NULL; |
| 896 | } |
| 897 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 898 | mlog_exit(status); |
| 899 | return status; |
| 900 | } |
| 901 | |
| 902 | /* local alloc code has to do the same thing, so rather than do this |
| 903 | * twice.. */ |
| 904 | int ocfs2_reserve_cluster_bitmap_bits(struct ocfs2_super *osb, |
| 905 | struct ocfs2_alloc_context *ac) |
| 906 | { |
| 907 | int status; |
| 908 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 909 | ac->ac_which = OCFS2_AC_USE_MAIN; |
| 910 | ac->ac_group_search = ocfs2_cluster_group_search; |
| 911 | |
Mark Fasheh | da5cbf2 | 2006-10-06 18:34:35 -0700 | [diff] [blame] | 912 | status = ocfs2_reserve_suballoc_bits(osb, ac, |
| 913 | GLOBAL_BITMAP_SYSTEM_INODE, |
Tao Ma | feb473a | 2009-02-25 00:53:25 +0800 | [diff] [blame] | 914 | OCFS2_INVALID_SLOT, NULL, |
Tao Ma | ffda89a | 2008-03-03 17:12:09 +0800 | [diff] [blame] | 915 | ALLOC_NEW_GROUP); |
Mark Fasheh | da5cbf2 | 2006-10-06 18:34:35 -0700 | [diff] [blame] | 916 | if (status < 0 && status != -ENOSPC) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 917 | mlog_errno(status); |
Mark Fasheh | da5cbf2 | 2006-10-06 18:34:35 -0700 | [diff] [blame] | 918 | goto bail; |
| 919 | } |
| 920 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 921 | bail: |
| 922 | return status; |
| 923 | } |
| 924 | |
| 925 | /* Callers don't need to care which bitmap (local alloc or main) to |
| 926 | * use so we figure it out for them, but unfortunately this clutters |
| 927 | * things a bit. */ |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 928 | static int ocfs2_reserve_clusters_with_limit(struct ocfs2_super *osb, |
| 929 | u32 bits_wanted, u64 max_block, |
Tao Ma | 60ca81e | 2009-02-25 00:53:24 +0800 | [diff] [blame] | 930 | int flags, |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 931 | struct ocfs2_alloc_context **ac) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 932 | { |
| 933 | int status; |
| 934 | |
| 935 | mlog_entry_void(); |
| 936 | |
Robert P. J. Day | cd86128 | 2006-12-13 00:34:52 -0800 | [diff] [blame] | 937 | *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 938 | if (!(*ac)) { |
| 939 | status = -ENOMEM; |
| 940 | mlog_errno(status); |
| 941 | goto bail; |
| 942 | } |
| 943 | |
| 944 | (*ac)->ac_bits_wanted = bits_wanted; |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 945 | (*ac)->ac_max_block = max_block; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 946 | |
| 947 | status = -ENOSPC; |
Tao Ma | 60ca81e | 2009-02-25 00:53:24 +0800 | [diff] [blame] | 948 | if (!(flags & ALLOC_GROUPS_FROM_GLOBAL) && |
| 949 | ocfs2_alloc_should_use_local(osb, bits_wanted)) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 950 | status = ocfs2_reserve_local_alloc_bits(osb, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 951 | bits_wanted, |
| 952 | *ac); |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 953 | if (status == -EFBIG) { |
| 954 | /* The local alloc window is outside ac_max_block. |
| 955 | * use the main bitmap. */ |
| 956 | status = -ENOSPC; |
| 957 | } else if ((status < 0) && (status != -ENOSPC)) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 958 | mlog_errno(status); |
| 959 | goto bail; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 960 | } |
| 961 | } |
| 962 | |
| 963 | if (status == -ENOSPC) { |
| 964 | status = ocfs2_reserve_cluster_bitmap_bits(osb, *ac); |
| 965 | if (status < 0) { |
| 966 | if (status != -ENOSPC) |
| 967 | mlog_errno(status); |
| 968 | goto bail; |
| 969 | } |
| 970 | } |
| 971 | |
| 972 | status = 0; |
| 973 | bail: |
| 974 | if ((status < 0) && *ac) { |
| 975 | ocfs2_free_alloc_context(*ac); |
| 976 | *ac = NULL; |
| 977 | } |
| 978 | |
| 979 | mlog_exit(status); |
| 980 | return status; |
| 981 | } |
| 982 | |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 983 | int ocfs2_reserve_clusters(struct ocfs2_super *osb, |
| 984 | u32 bits_wanted, |
| 985 | struct ocfs2_alloc_context **ac) |
| 986 | { |
Tao Ma | 60ca81e | 2009-02-25 00:53:24 +0800 | [diff] [blame] | 987 | return ocfs2_reserve_clusters_with_limit(osb, bits_wanted, 0, |
| 988 | ALLOC_NEW_GROUP, ac); |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 989 | } |
| 990 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 991 | /* |
| 992 | * More or less lifted from ext3. I'll leave their description below: |
| 993 | * |
| 994 | * "For ext3 allocations, we must not reuse any blocks which are |
| 995 | * allocated in the bitmap buffer's "last committed data" copy. This |
| 996 | * prevents deletes from freeing up the page for reuse until we have |
| 997 | * committed the delete transaction. |
| 998 | * |
| 999 | * If we didn't do this, then deleting something and reallocating it as |
| 1000 | * data would allow the old block to be overwritten before the |
| 1001 | * transaction committed (because we force data to disk before commit). |
| 1002 | * This would lead to corruption if we crashed between overwriting the |
| 1003 | * data and committing the delete. |
| 1004 | * |
| 1005 | * @@@ We may want to make this allocation behaviour conditional on |
| 1006 | * data-writes at some point, and disable it for metadata allocations or |
| 1007 | * sync-data inodes." |
| 1008 | * |
| 1009 | * Note: OCFS2 already does this differently for metadata vs data |
Joe Perches | c78bad1 | 2008-02-03 17:33:42 +0200 | [diff] [blame] | 1010 | * allocations, as those bitmaps are separate and undo access is never |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1011 | * called on a metadata group descriptor. |
| 1012 | */ |
| 1013 | static int ocfs2_test_bg_bit_allocatable(struct buffer_head *bg_bh, |
| 1014 | int nr) |
| 1015 | { |
| 1016 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; |
Sunil Mushran | 94e41ec | 2009-06-19 14:45:54 -0700 | [diff] [blame] | 1017 | int ret; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1018 | |
| 1019 | if (ocfs2_test_bit(nr, (unsigned long *)bg->bg_bitmap)) |
| 1020 | return 0; |
Sunil Mushran | 94e41ec | 2009-06-19 14:45:54 -0700 | [diff] [blame] | 1021 | |
| 1022 | if (!buffer_jbd(bg_bh)) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1023 | return 1; |
| 1024 | |
Sunil Mushran | 94e41ec | 2009-06-19 14:45:54 -0700 | [diff] [blame] | 1025 | jbd_lock_bh_state(bg_bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1026 | bg = (struct ocfs2_group_desc *) bh2jh(bg_bh)->b_committed_data; |
Sunil Mushran | 94e41ec | 2009-06-19 14:45:54 -0700 | [diff] [blame] | 1027 | if (bg) |
| 1028 | ret = !ocfs2_test_bit(nr, (unsigned long *)bg->bg_bitmap); |
| 1029 | else |
| 1030 | ret = 1; |
| 1031 | jbd_unlock_bh_state(bg_bh); |
| 1032 | |
| 1033 | return ret; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1034 | } |
| 1035 | |
| 1036 | static int ocfs2_block_group_find_clear_bits(struct ocfs2_super *osb, |
| 1037 | struct buffer_head *bg_bh, |
| 1038 | unsigned int bits_wanted, |
Mark Fasheh | 7bf72ed | 2006-05-03 17:46:50 -0700 | [diff] [blame] | 1039 | unsigned int total_bits, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1040 | u16 *bit_off, |
| 1041 | u16 *bits_found) |
| 1042 | { |
| 1043 | void *bitmap; |
| 1044 | u16 best_offset, best_size; |
| 1045 | int offset, start, found, status = 0; |
| 1046 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; |
| 1047 | |
Joel Becker | 4203530 | 2008-11-13 14:49:15 -0800 | [diff] [blame] | 1048 | /* Callers got this descriptor from |
| 1049 | * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ |
| 1050 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1051 | |
| 1052 | found = start = best_offset = best_size = 0; |
| 1053 | bitmap = bg->bg_bitmap; |
| 1054 | |
Mark Fasheh | 7bf72ed | 2006-05-03 17:46:50 -0700 | [diff] [blame] | 1055 | while((offset = ocfs2_find_next_zero_bit(bitmap, total_bits, start)) != -1) { |
| 1056 | if (offset == total_bits) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1057 | break; |
| 1058 | |
| 1059 | if (!ocfs2_test_bg_bit_allocatable(bg_bh, offset)) { |
| 1060 | /* We found a zero, but we can't use it as it |
| 1061 | * hasn't been put to disk yet! */ |
| 1062 | found = 0; |
| 1063 | start = offset + 1; |
| 1064 | } else if (offset == start) { |
| 1065 | /* we found a zero */ |
| 1066 | found++; |
| 1067 | /* move start to the next bit to test */ |
| 1068 | start++; |
| 1069 | } else { |
| 1070 | /* got a zero after some ones */ |
| 1071 | found = 1; |
| 1072 | start = offset + 1; |
| 1073 | } |
| 1074 | if (found > best_size) { |
| 1075 | best_size = found; |
| 1076 | best_offset = start - found; |
| 1077 | } |
| 1078 | /* we got everything we needed */ |
| 1079 | if (found == bits_wanted) { |
| 1080 | /* mlog(0, "Found it all!\n"); */ |
| 1081 | break; |
| 1082 | } |
| 1083 | } |
| 1084 | |
| 1085 | /* XXX: I think the first clause is equivalent to the second |
| 1086 | * - jlbec */ |
| 1087 | if (found == bits_wanted) { |
| 1088 | *bit_off = start - found; |
| 1089 | *bits_found = found; |
| 1090 | } else if (best_size) { |
| 1091 | *bit_off = best_offset; |
| 1092 | *bits_found = best_size; |
| 1093 | } else { |
| 1094 | status = -ENOSPC; |
| 1095 | /* No error log here -- see the comment above |
| 1096 | * ocfs2_test_bg_bit_allocatable */ |
| 1097 | } |
| 1098 | |
| 1099 | return status; |
| 1100 | } |
| 1101 | |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 1102 | static inline int ocfs2_block_group_set_bits(handle_t *handle, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1103 | struct inode *alloc_inode, |
| 1104 | struct ocfs2_group_desc *bg, |
| 1105 | struct buffer_head *group_bh, |
| 1106 | unsigned int bit_off, |
| 1107 | unsigned int num_bits) |
| 1108 | { |
| 1109 | int status; |
| 1110 | void *bitmap = bg->bg_bitmap; |
| 1111 | int journal_type = OCFS2_JOURNAL_ACCESS_WRITE; |
| 1112 | |
| 1113 | mlog_entry_void(); |
| 1114 | |
Joel Becker | 4203530 | 2008-11-13 14:49:15 -0800 | [diff] [blame] | 1115 | /* All callers get the descriptor via |
| 1116 | * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ |
| 1117 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1118 | BUG_ON(le16_to_cpu(bg->bg_free_bits_count) < num_bits); |
| 1119 | |
| 1120 | mlog(0, "block_group_set_bits: off = %u, num = %u\n", bit_off, |
| 1121 | num_bits); |
| 1122 | |
| 1123 | if (ocfs2_is_cluster_bitmap(alloc_inode)) |
| 1124 | journal_type = OCFS2_JOURNAL_ACCESS_UNDO; |
| 1125 | |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 1126 | status = ocfs2_journal_access_gd(handle, |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 1127 | INODE_CACHE(alloc_inode), |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 1128 | group_bh, |
| 1129 | journal_type); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1130 | if (status < 0) { |
| 1131 | mlog_errno(status); |
| 1132 | goto bail; |
| 1133 | } |
| 1134 | |
| 1135 | le16_add_cpu(&bg->bg_free_bits_count, -num_bits); |
| 1136 | |
| 1137 | while(num_bits--) |
| 1138 | ocfs2_set_bit(bit_off++, bitmap); |
| 1139 | |
| 1140 | status = ocfs2_journal_dirty(handle, |
| 1141 | group_bh); |
| 1142 | if (status < 0) { |
| 1143 | mlog_errno(status); |
| 1144 | goto bail; |
| 1145 | } |
| 1146 | |
| 1147 | bail: |
| 1148 | mlog_exit(status); |
| 1149 | return status; |
| 1150 | } |
| 1151 | |
| 1152 | /* find the one with the most empty bits */ |
| 1153 | static inline u16 ocfs2_find_victim_chain(struct ocfs2_chain_list *cl) |
| 1154 | { |
| 1155 | u16 curr, best; |
| 1156 | |
| 1157 | BUG_ON(!cl->cl_next_free_rec); |
| 1158 | |
| 1159 | best = curr = 0; |
| 1160 | while (curr < le16_to_cpu(cl->cl_next_free_rec)) { |
| 1161 | if (le32_to_cpu(cl->cl_recs[curr].c_free) > |
| 1162 | le32_to_cpu(cl->cl_recs[best].c_free)) |
| 1163 | best = curr; |
| 1164 | curr++; |
| 1165 | } |
| 1166 | |
| 1167 | BUG_ON(best >= le16_to_cpu(cl->cl_next_free_rec)); |
| 1168 | return best; |
| 1169 | } |
| 1170 | |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 1171 | static int ocfs2_relink_block_group(handle_t *handle, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1172 | struct inode *alloc_inode, |
| 1173 | struct buffer_head *fe_bh, |
| 1174 | struct buffer_head *bg_bh, |
| 1175 | struct buffer_head *prev_bg_bh, |
| 1176 | u16 chain) |
| 1177 | { |
| 1178 | int status; |
| 1179 | /* there is a really tiny chance the journal calls could fail, |
| 1180 | * but we wouldn't want inconsistent blocks in *any* case. */ |
| 1181 | u64 fe_ptr, bg_ptr, prev_bg_ptr; |
| 1182 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; |
| 1183 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; |
| 1184 | struct ocfs2_group_desc *prev_bg = (struct ocfs2_group_desc *) prev_bg_bh->b_data; |
| 1185 | |
Joel Becker | 4203530 | 2008-11-13 14:49:15 -0800 | [diff] [blame] | 1186 | /* The caller got these descriptors from |
| 1187 | * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ |
| 1188 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); |
| 1189 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(prev_bg)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1190 | |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1191 | mlog(0, "Suballoc %llu, chain %u, move group %llu to top, prev = %llu\n", |
Mark Fasheh | 1ca1a11 | 2007-04-27 16:01:25 -0700 | [diff] [blame] | 1192 | (unsigned long long)le64_to_cpu(fe->i_blkno), chain, |
| 1193 | (unsigned long long)le64_to_cpu(bg->bg_blkno), |
| 1194 | (unsigned long long)le64_to_cpu(prev_bg->bg_blkno)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1195 | |
| 1196 | fe_ptr = le64_to_cpu(fe->id2.i_chain.cl_recs[chain].c_blkno); |
| 1197 | bg_ptr = le64_to_cpu(bg->bg_next_group); |
| 1198 | prev_bg_ptr = le64_to_cpu(prev_bg->bg_next_group); |
| 1199 | |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 1200 | status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), |
| 1201 | prev_bg_bh, |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 1202 | OCFS2_JOURNAL_ACCESS_WRITE); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1203 | if (status < 0) { |
| 1204 | mlog_errno(status); |
| 1205 | goto out_rollback; |
| 1206 | } |
| 1207 | |
| 1208 | prev_bg->bg_next_group = bg->bg_next_group; |
| 1209 | |
| 1210 | status = ocfs2_journal_dirty(handle, prev_bg_bh); |
| 1211 | if (status < 0) { |
| 1212 | mlog_errno(status); |
| 1213 | goto out_rollback; |
| 1214 | } |
| 1215 | |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 1216 | status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), |
| 1217 | bg_bh, OCFS2_JOURNAL_ACCESS_WRITE); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1218 | if (status < 0) { |
| 1219 | mlog_errno(status); |
| 1220 | goto out_rollback; |
| 1221 | } |
| 1222 | |
| 1223 | bg->bg_next_group = fe->id2.i_chain.cl_recs[chain].c_blkno; |
| 1224 | |
| 1225 | status = ocfs2_journal_dirty(handle, bg_bh); |
| 1226 | if (status < 0) { |
| 1227 | mlog_errno(status); |
| 1228 | goto out_rollback; |
| 1229 | } |
| 1230 | |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 1231 | status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), |
| 1232 | fe_bh, OCFS2_JOURNAL_ACCESS_WRITE); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1233 | if (status < 0) { |
| 1234 | mlog_errno(status); |
| 1235 | goto out_rollback; |
| 1236 | } |
| 1237 | |
| 1238 | fe->id2.i_chain.cl_recs[chain].c_blkno = bg->bg_blkno; |
| 1239 | |
| 1240 | status = ocfs2_journal_dirty(handle, fe_bh); |
| 1241 | if (status < 0) { |
| 1242 | mlog_errno(status); |
| 1243 | goto out_rollback; |
| 1244 | } |
| 1245 | |
| 1246 | status = 0; |
| 1247 | out_rollback: |
| 1248 | if (status < 0) { |
| 1249 | fe->id2.i_chain.cl_recs[chain].c_blkno = cpu_to_le64(fe_ptr); |
| 1250 | bg->bg_next_group = cpu_to_le64(bg_ptr); |
| 1251 | prev_bg->bg_next_group = cpu_to_le64(prev_bg_ptr); |
| 1252 | } |
Joel Becker | 4203530 | 2008-11-13 14:49:15 -0800 | [diff] [blame] | 1253 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1254 | mlog_exit(status); |
| 1255 | return status; |
| 1256 | } |
| 1257 | |
| 1258 | static inline int ocfs2_block_group_reasonably_empty(struct ocfs2_group_desc *bg, |
| 1259 | u32 wanted) |
| 1260 | { |
| 1261 | return le16_to_cpu(bg->bg_free_bits_count) > wanted; |
| 1262 | } |
| 1263 | |
| 1264 | /* return 0 on success, -ENOSPC to keep searching and any other < 0 |
| 1265 | * value on error. */ |
| 1266 | static int ocfs2_cluster_group_search(struct inode *inode, |
| 1267 | struct buffer_head *group_bh, |
| 1268 | u32 bits_wanted, u32 min_bits, |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 1269 | u64 max_block, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1270 | u16 *bit_off, u16 *bits_found) |
| 1271 | { |
| 1272 | int search = -ENOSPC; |
| 1273 | int ret; |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 1274 | u64 blkoff; |
Mark Fasheh | 7bf72ed | 2006-05-03 17:46:50 -0700 | [diff] [blame] | 1275 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *) group_bh->b_data; |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 1276 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1277 | u16 tmp_off, tmp_found; |
Mark Fasheh | 7bf72ed | 2006-05-03 17:46:50 -0700 | [diff] [blame] | 1278 | unsigned int max_bits, gd_cluster_off; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1279 | |
| 1280 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); |
| 1281 | |
Mark Fasheh | 7bf72ed | 2006-05-03 17:46:50 -0700 | [diff] [blame] | 1282 | if (gd->bg_free_bits_count) { |
| 1283 | max_bits = le16_to_cpu(gd->bg_bits); |
| 1284 | |
| 1285 | /* Tail groups in cluster bitmaps which aren't cpg |
| 1286 | * aligned are prone to partial extention by a failed |
| 1287 | * fs resize. If the file system resize never got to |
| 1288 | * update the dinode cluster count, then we don't want |
| 1289 | * to trust any clusters past it, regardless of what |
| 1290 | * the group descriptor says. */ |
| 1291 | gd_cluster_off = ocfs2_blocks_to_clusters(inode->i_sb, |
| 1292 | le64_to_cpu(gd->bg_blkno)); |
| 1293 | if ((gd_cluster_off + max_bits) > |
| 1294 | OCFS2_I(inode)->ip_clusters) { |
| 1295 | max_bits = OCFS2_I(inode)->ip_clusters - gd_cluster_off; |
| 1296 | mlog(0, "Desc %llu, bg_bits %u, clusters %u, use %u\n", |
| 1297 | (unsigned long long)le64_to_cpu(gd->bg_blkno), |
| 1298 | le16_to_cpu(gd->bg_bits), |
| 1299 | OCFS2_I(inode)->ip_clusters, max_bits); |
| 1300 | } |
| 1301 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1302 | ret = ocfs2_block_group_find_clear_bits(OCFS2_SB(inode->i_sb), |
| 1303 | group_bh, bits_wanted, |
Mark Fasheh | 7bf72ed | 2006-05-03 17:46:50 -0700 | [diff] [blame] | 1304 | max_bits, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1305 | &tmp_off, &tmp_found); |
| 1306 | if (ret) |
| 1307 | return ret; |
| 1308 | |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 1309 | if (max_block) { |
| 1310 | blkoff = ocfs2_clusters_to_blocks(inode->i_sb, |
| 1311 | gd_cluster_off + |
| 1312 | tmp_off + tmp_found); |
| 1313 | mlog(0, "Checking %llu against %llu\n", |
| 1314 | (unsigned long long)blkoff, |
| 1315 | (unsigned long long)max_block); |
| 1316 | if (blkoff > max_block) |
| 1317 | return -ENOSPC; |
| 1318 | } |
| 1319 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1320 | /* ocfs2_block_group_find_clear_bits() might |
| 1321 | * return success, but we still want to return |
| 1322 | * -ENOSPC unless it found the minimum number |
| 1323 | * of bits. */ |
| 1324 | if (min_bits <= tmp_found) { |
| 1325 | *bit_off = tmp_off; |
| 1326 | *bits_found = tmp_found; |
| 1327 | search = 0; /* success */ |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 1328 | } else if (tmp_found) { |
| 1329 | /* |
| 1330 | * Don't show bits which we'll be returning |
| 1331 | * for allocation to the local alloc bitmap. |
| 1332 | */ |
| 1333 | ocfs2_local_alloc_seen_free_bits(osb, tmp_found); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1334 | } |
| 1335 | } |
| 1336 | |
| 1337 | return search; |
| 1338 | } |
| 1339 | |
| 1340 | static int ocfs2_block_group_search(struct inode *inode, |
| 1341 | struct buffer_head *group_bh, |
| 1342 | u32 bits_wanted, u32 min_bits, |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 1343 | u64 max_block, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1344 | u16 *bit_off, u16 *bits_found) |
| 1345 | { |
| 1346 | int ret = -ENOSPC; |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 1347 | u64 blkoff; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1348 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) group_bh->b_data; |
| 1349 | |
| 1350 | BUG_ON(min_bits != 1); |
| 1351 | BUG_ON(ocfs2_is_cluster_bitmap(inode)); |
| 1352 | |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 1353 | if (bg->bg_free_bits_count) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1354 | ret = ocfs2_block_group_find_clear_bits(OCFS2_SB(inode->i_sb), |
| 1355 | group_bh, bits_wanted, |
Mark Fasheh | 7bf72ed | 2006-05-03 17:46:50 -0700 | [diff] [blame] | 1356 | le16_to_cpu(bg->bg_bits), |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1357 | bit_off, bits_found); |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 1358 | if (!ret && max_block) { |
| 1359 | blkoff = le64_to_cpu(bg->bg_blkno) + *bit_off + |
| 1360 | *bits_found; |
| 1361 | mlog(0, "Checking %llu against %llu\n", |
| 1362 | (unsigned long long)blkoff, |
| 1363 | (unsigned long long)max_block); |
| 1364 | if (blkoff > max_block) |
| 1365 | ret = -ENOSPC; |
| 1366 | } |
| 1367 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1368 | |
| 1369 | return ret; |
| 1370 | } |
| 1371 | |
Mark Fasheh | 883d4ca | 2006-06-05 16:41:00 -0400 | [diff] [blame] | 1372 | static int ocfs2_alloc_dinode_update_counts(struct inode *inode, |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 1373 | handle_t *handle, |
Mark Fasheh | 883d4ca | 2006-06-05 16:41:00 -0400 | [diff] [blame] | 1374 | struct buffer_head *di_bh, |
| 1375 | u32 num_bits, |
| 1376 | u16 chain) |
| 1377 | { |
| 1378 | int ret; |
| 1379 | u32 tmp_used; |
| 1380 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data; |
| 1381 | struct ocfs2_chain_list *cl = (struct ocfs2_chain_list *) &di->id2.i_chain; |
| 1382 | |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 1383 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 1384 | OCFS2_JOURNAL_ACCESS_WRITE); |
Mark Fasheh | 883d4ca | 2006-06-05 16:41:00 -0400 | [diff] [blame] | 1385 | if (ret < 0) { |
| 1386 | mlog_errno(ret); |
| 1387 | goto out; |
| 1388 | } |
| 1389 | |
| 1390 | tmp_used = le32_to_cpu(di->id1.bitmap1.i_used); |
| 1391 | di->id1.bitmap1.i_used = cpu_to_le32(num_bits + tmp_used); |
| 1392 | le32_add_cpu(&cl->cl_recs[chain].c_free, -num_bits); |
| 1393 | |
| 1394 | ret = ocfs2_journal_dirty(handle, di_bh); |
| 1395 | if (ret < 0) |
| 1396 | mlog_errno(ret); |
| 1397 | |
| 1398 | out: |
| 1399 | return ret; |
| 1400 | } |
| 1401 | |
| 1402 | static int ocfs2_search_one_group(struct ocfs2_alloc_context *ac, |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 1403 | handle_t *handle, |
Mark Fasheh | 883d4ca | 2006-06-05 16:41:00 -0400 | [diff] [blame] | 1404 | u32 bits_wanted, |
| 1405 | u32 min_bits, |
| 1406 | u16 *bit_off, |
| 1407 | unsigned int *num_bits, |
| 1408 | u64 gd_blkno, |
| 1409 | u16 *bits_left) |
| 1410 | { |
| 1411 | int ret; |
| 1412 | u16 found; |
| 1413 | struct buffer_head *group_bh = NULL; |
| 1414 | struct ocfs2_group_desc *gd; |
Joel Becker | 68f64d4 | 2008-11-13 14:49:14 -0800 | [diff] [blame] | 1415 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)ac->ac_bh->b_data; |
Mark Fasheh | 883d4ca | 2006-06-05 16:41:00 -0400 | [diff] [blame] | 1416 | struct inode *alloc_inode = ac->ac_inode; |
Mark Fasheh | 883d4ca | 2006-06-05 16:41:00 -0400 | [diff] [blame] | 1417 | |
Joel Becker | 68f64d4 | 2008-11-13 14:49:14 -0800 | [diff] [blame] | 1418 | ret = ocfs2_read_group_descriptor(alloc_inode, di, gd_blkno, |
| 1419 | &group_bh); |
Mark Fasheh | 883d4ca | 2006-06-05 16:41:00 -0400 | [diff] [blame] | 1420 | if (ret < 0) { |
| 1421 | mlog_errno(ret); |
| 1422 | return ret; |
| 1423 | } |
| 1424 | |
| 1425 | gd = (struct ocfs2_group_desc *) group_bh->b_data; |
Mark Fasheh | 883d4ca | 2006-06-05 16:41:00 -0400 | [diff] [blame] | 1426 | ret = ac->ac_group_search(alloc_inode, group_bh, bits_wanted, min_bits, |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 1427 | ac->ac_max_block, bit_off, &found); |
Mark Fasheh | 883d4ca | 2006-06-05 16:41:00 -0400 | [diff] [blame] | 1428 | if (ret < 0) { |
| 1429 | if (ret != -ENOSPC) |
| 1430 | mlog_errno(ret); |
| 1431 | goto out; |
| 1432 | } |
| 1433 | |
| 1434 | *num_bits = found; |
| 1435 | |
| 1436 | ret = ocfs2_alloc_dinode_update_counts(alloc_inode, handle, ac->ac_bh, |
| 1437 | *num_bits, |
| 1438 | le16_to_cpu(gd->bg_chain)); |
| 1439 | if (ret < 0) { |
| 1440 | mlog_errno(ret); |
| 1441 | goto out; |
| 1442 | } |
| 1443 | |
| 1444 | ret = ocfs2_block_group_set_bits(handle, alloc_inode, gd, group_bh, |
| 1445 | *bit_off, *num_bits); |
| 1446 | if (ret < 0) |
| 1447 | mlog_errno(ret); |
| 1448 | |
| 1449 | *bits_left = le16_to_cpu(gd->bg_free_bits_count); |
| 1450 | |
| 1451 | out: |
| 1452 | brelse(group_bh); |
| 1453 | |
| 1454 | return ret; |
| 1455 | } |
| 1456 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1457 | static int ocfs2_search_chain(struct ocfs2_alloc_context *ac, |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 1458 | handle_t *handle, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1459 | u32 bits_wanted, |
| 1460 | u32 min_bits, |
| 1461 | u16 *bit_off, |
| 1462 | unsigned int *num_bits, |
Mark Fasheh | 883d4ca | 2006-06-05 16:41:00 -0400 | [diff] [blame] | 1463 | u64 *bg_blkno, |
| 1464 | u16 *bits_left) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1465 | { |
| 1466 | int status; |
| 1467 | u16 chain, tmp_bits; |
| 1468 | u32 tmp_used; |
| 1469 | u64 next_group; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1470 | struct inode *alloc_inode = ac->ac_inode; |
| 1471 | struct buffer_head *group_bh = NULL; |
| 1472 | struct buffer_head *prev_group_bh = NULL; |
| 1473 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) ac->ac_bh->b_data; |
| 1474 | struct ocfs2_chain_list *cl = (struct ocfs2_chain_list *) &fe->id2.i_chain; |
| 1475 | struct ocfs2_group_desc *bg; |
| 1476 | |
| 1477 | chain = ac->ac_chain; |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1478 | mlog(0, "trying to alloc %u bits from chain %u, inode %llu\n", |
| 1479 | bits_wanted, chain, |
| 1480 | (unsigned long long)OCFS2_I(alloc_inode)->ip_blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1481 | |
Joel Becker | 68f64d4 | 2008-11-13 14:49:14 -0800 | [diff] [blame] | 1482 | status = ocfs2_read_group_descriptor(alloc_inode, fe, |
| 1483 | le64_to_cpu(cl->cl_recs[chain].c_blkno), |
| 1484 | &group_bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1485 | if (status < 0) { |
| 1486 | mlog_errno(status); |
| 1487 | goto bail; |
| 1488 | } |
| 1489 | bg = (struct ocfs2_group_desc *) group_bh->b_data; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1490 | |
| 1491 | status = -ENOSPC; |
| 1492 | /* for now, the chain search is a bit simplistic. We just use |
| 1493 | * the 1st group with any empty bits. */ |
Joel Becker | 1187c96 | 2008-09-03 20:03:39 -0700 | [diff] [blame] | 1494 | while ((status = ac->ac_group_search(alloc_inode, group_bh, |
| 1495 | bits_wanted, min_bits, |
| 1496 | ac->ac_max_block, bit_off, |
| 1497 | &tmp_bits)) == -ENOSPC) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1498 | if (!bg->bg_next_group) |
| 1499 | break; |
Mark Fasheh | a81cb88 | 2008-10-07 14:25:16 -0700 | [diff] [blame] | 1500 | |
| 1501 | brelse(prev_group_bh); |
| 1502 | prev_group_bh = NULL; |
| 1503 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1504 | next_group = le64_to_cpu(bg->bg_next_group); |
| 1505 | prev_group_bh = group_bh; |
| 1506 | group_bh = NULL; |
Joel Becker | 68f64d4 | 2008-11-13 14:49:14 -0800 | [diff] [blame] | 1507 | status = ocfs2_read_group_descriptor(alloc_inode, fe, |
| 1508 | next_group, &group_bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1509 | if (status < 0) { |
| 1510 | mlog_errno(status); |
| 1511 | goto bail; |
| 1512 | } |
| 1513 | bg = (struct ocfs2_group_desc *) group_bh->b_data; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1514 | } |
| 1515 | if (status < 0) { |
| 1516 | if (status != -ENOSPC) |
| 1517 | mlog_errno(status); |
| 1518 | goto bail; |
| 1519 | } |
| 1520 | |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1521 | mlog(0, "alloc succeeds: we give %u bits from block group %llu\n", |
Mark Fasheh | 1ca1a11 | 2007-04-27 16:01:25 -0700 | [diff] [blame] | 1522 | tmp_bits, (unsigned long long)le64_to_cpu(bg->bg_blkno)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1523 | |
| 1524 | *num_bits = tmp_bits; |
| 1525 | |
| 1526 | BUG_ON(*num_bits == 0); |
| 1527 | |
| 1528 | /* |
| 1529 | * Keep track of previous block descriptor read. When |
| 1530 | * we find a target, if we have read more than X |
| 1531 | * number of descriptors, and the target is reasonably |
| 1532 | * empty, relink him to top of his chain. |
| 1533 | * |
| 1534 | * We've read 0 extra blocks and only send one more to |
| 1535 | * the transaction, yet the next guy to search has a |
| 1536 | * much easier time. |
| 1537 | * |
| 1538 | * Do this *after* figuring out how many bits we're taking out |
| 1539 | * of our target group. |
| 1540 | */ |
| 1541 | if (ac->ac_allow_chain_relink && |
| 1542 | (prev_group_bh) && |
| 1543 | (ocfs2_block_group_reasonably_empty(bg, *num_bits))) { |
| 1544 | status = ocfs2_relink_block_group(handle, alloc_inode, |
| 1545 | ac->ac_bh, group_bh, |
| 1546 | prev_group_bh, chain); |
| 1547 | if (status < 0) { |
| 1548 | mlog_errno(status); |
| 1549 | goto bail; |
| 1550 | } |
| 1551 | } |
| 1552 | |
| 1553 | /* Ok, claim our bits now: set the info on dinode, chainlist |
| 1554 | * and then the group */ |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 1555 | status = ocfs2_journal_access_di(handle, |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 1556 | INODE_CACHE(alloc_inode), |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 1557 | ac->ac_bh, |
| 1558 | OCFS2_JOURNAL_ACCESS_WRITE); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1559 | if (status < 0) { |
| 1560 | mlog_errno(status); |
| 1561 | goto bail; |
| 1562 | } |
| 1563 | |
| 1564 | tmp_used = le32_to_cpu(fe->id1.bitmap1.i_used); |
| 1565 | fe->id1.bitmap1.i_used = cpu_to_le32(*num_bits + tmp_used); |
| 1566 | le32_add_cpu(&cl->cl_recs[chain].c_free, -(*num_bits)); |
| 1567 | |
| 1568 | status = ocfs2_journal_dirty(handle, |
| 1569 | ac->ac_bh); |
| 1570 | if (status < 0) { |
| 1571 | mlog_errno(status); |
| 1572 | goto bail; |
| 1573 | } |
| 1574 | |
| 1575 | status = ocfs2_block_group_set_bits(handle, |
| 1576 | alloc_inode, |
| 1577 | bg, |
| 1578 | group_bh, |
| 1579 | *bit_off, |
| 1580 | *num_bits); |
| 1581 | if (status < 0) { |
| 1582 | mlog_errno(status); |
| 1583 | goto bail; |
| 1584 | } |
| 1585 | |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1586 | mlog(0, "Allocated %u bits from suballocator %llu\n", *num_bits, |
Mark Fasheh | 1ca1a11 | 2007-04-27 16:01:25 -0700 | [diff] [blame] | 1587 | (unsigned long long)le64_to_cpu(fe->i_blkno)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1588 | |
| 1589 | *bg_blkno = le64_to_cpu(bg->bg_blkno); |
Mark Fasheh | 883d4ca | 2006-06-05 16:41:00 -0400 | [diff] [blame] | 1590 | *bits_left = le16_to_cpu(bg->bg_free_bits_count); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1591 | bail: |
Mark Fasheh | a81cb88 | 2008-10-07 14:25:16 -0700 | [diff] [blame] | 1592 | brelse(group_bh); |
| 1593 | brelse(prev_group_bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1594 | |
| 1595 | mlog_exit(status); |
| 1596 | return status; |
| 1597 | } |
| 1598 | |
| 1599 | /* will give out up to bits_wanted contiguous bits. */ |
| 1600 | static int ocfs2_claim_suballoc_bits(struct ocfs2_super *osb, |
| 1601 | struct ocfs2_alloc_context *ac, |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 1602 | handle_t *handle, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1603 | u32 bits_wanted, |
| 1604 | u32 min_bits, |
| 1605 | u16 *bit_off, |
| 1606 | unsigned int *num_bits, |
| 1607 | u64 *bg_blkno) |
| 1608 | { |
| 1609 | int status; |
| 1610 | u16 victim, i; |
Mark Fasheh | 883d4ca | 2006-06-05 16:41:00 -0400 | [diff] [blame] | 1611 | u16 bits_left = 0; |
| 1612 | u64 hint_blkno = ac->ac_last_group; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1613 | struct ocfs2_chain_list *cl; |
| 1614 | struct ocfs2_dinode *fe; |
| 1615 | |
| 1616 | mlog_entry_void(); |
| 1617 | |
| 1618 | BUG_ON(ac->ac_bits_given >= ac->ac_bits_wanted); |
| 1619 | BUG_ON(bits_wanted > (ac->ac_bits_wanted - ac->ac_bits_given)); |
| 1620 | BUG_ON(!ac->ac_bh); |
| 1621 | |
| 1622 | fe = (struct ocfs2_dinode *) ac->ac_bh->b_data; |
Joel Becker | 10995aa | 2008-11-13 14:49:12 -0800 | [diff] [blame] | 1623 | |
| 1624 | /* The bh was validated by the inode read during |
| 1625 | * ocfs2_reserve_suballoc_bits(). Any corruption is a code bug. */ |
| 1626 | BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); |
| 1627 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1628 | if (le32_to_cpu(fe->id1.bitmap1.i_used) >= |
| 1629 | le32_to_cpu(fe->id1.bitmap1.i_total)) { |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1630 | ocfs2_error(osb->sb, "Chain allocator dinode %llu has %u used " |
| 1631 | "bits but only %u total.", |
| 1632 | (unsigned long long)le64_to_cpu(fe->i_blkno), |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1633 | le32_to_cpu(fe->id1.bitmap1.i_used), |
| 1634 | le32_to_cpu(fe->id1.bitmap1.i_total)); |
| 1635 | status = -EIO; |
| 1636 | goto bail; |
| 1637 | } |
| 1638 | |
Mark Fasheh | 883d4ca | 2006-06-05 16:41:00 -0400 | [diff] [blame] | 1639 | if (hint_blkno) { |
| 1640 | /* Attempt to short-circuit the usual search mechanism |
| 1641 | * by jumping straight to the most recently used |
| 1642 | * allocation group. This helps us mantain some |
| 1643 | * contiguousness across allocations. */ |
Mark Fasheh | da5cbf2 | 2006-10-06 18:34:35 -0700 | [diff] [blame] | 1644 | status = ocfs2_search_one_group(ac, handle, bits_wanted, |
| 1645 | min_bits, bit_off, num_bits, |
Mark Fasheh | 883d4ca | 2006-06-05 16:41:00 -0400 | [diff] [blame] | 1646 | hint_blkno, &bits_left); |
| 1647 | if (!status) { |
| 1648 | /* Be careful to update *bg_blkno here as the |
| 1649 | * caller is expecting it to be filled in, and |
| 1650 | * ocfs2_search_one_group() won't do that for |
| 1651 | * us. */ |
| 1652 | *bg_blkno = hint_blkno; |
| 1653 | goto set_hint; |
| 1654 | } |
| 1655 | if (status < 0 && status != -ENOSPC) { |
| 1656 | mlog_errno(status); |
| 1657 | goto bail; |
| 1658 | } |
| 1659 | } |
| 1660 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1661 | cl = (struct ocfs2_chain_list *) &fe->id2.i_chain; |
| 1662 | |
| 1663 | victim = ocfs2_find_victim_chain(cl); |
| 1664 | ac->ac_chain = victim; |
| 1665 | ac->ac_allow_chain_relink = 1; |
| 1666 | |
Mark Fasheh | da5cbf2 | 2006-10-06 18:34:35 -0700 | [diff] [blame] | 1667 | status = ocfs2_search_chain(ac, handle, bits_wanted, min_bits, bit_off, |
Mark Fasheh | 883d4ca | 2006-06-05 16:41:00 -0400 | [diff] [blame] | 1668 | num_bits, bg_blkno, &bits_left); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1669 | if (!status) |
Mark Fasheh | 883d4ca | 2006-06-05 16:41:00 -0400 | [diff] [blame] | 1670 | goto set_hint; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1671 | if (status < 0 && status != -ENOSPC) { |
| 1672 | mlog_errno(status); |
| 1673 | goto bail; |
| 1674 | } |
| 1675 | |
| 1676 | mlog(0, "Search of victim chain %u came up with nothing, " |
| 1677 | "trying all chains now.\n", victim); |
| 1678 | |
| 1679 | /* If we didn't pick a good victim, then just default to |
| 1680 | * searching each chain in order. Don't allow chain relinking |
| 1681 | * because we only calculate enough journal credits for one |
| 1682 | * relink per alloc. */ |
| 1683 | ac->ac_allow_chain_relink = 0; |
| 1684 | for (i = 0; i < le16_to_cpu(cl->cl_next_free_rec); i ++) { |
| 1685 | if (i == victim) |
| 1686 | continue; |
| 1687 | if (!cl->cl_recs[i].c_free) |
| 1688 | continue; |
| 1689 | |
| 1690 | ac->ac_chain = i; |
Mark Fasheh | da5cbf2 | 2006-10-06 18:34:35 -0700 | [diff] [blame] | 1691 | status = ocfs2_search_chain(ac, handle, bits_wanted, min_bits, |
Mark Fasheh | 883d4ca | 2006-06-05 16:41:00 -0400 | [diff] [blame] | 1692 | bit_off, num_bits, bg_blkno, |
| 1693 | &bits_left); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1694 | if (!status) |
| 1695 | break; |
| 1696 | if (status < 0 && status != -ENOSPC) { |
| 1697 | mlog_errno(status); |
| 1698 | goto bail; |
| 1699 | } |
| 1700 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1701 | |
Mark Fasheh | 883d4ca | 2006-06-05 16:41:00 -0400 | [diff] [blame] | 1702 | set_hint: |
| 1703 | if (status != -ENOSPC) { |
| 1704 | /* If the next search of this group is not likely to |
| 1705 | * yield a suitable extent, then we reset the last |
| 1706 | * group hint so as to not waste a disk read */ |
| 1707 | if (bits_left < min_bits) |
| 1708 | ac->ac_last_group = 0; |
| 1709 | else |
| 1710 | ac->ac_last_group = *bg_blkno; |
| 1711 | } |
| 1712 | |
| 1713 | bail: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1714 | mlog_exit(status); |
| 1715 | return status; |
| 1716 | } |
| 1717 | |
| 1718 | int ocfs2_claim_metadata(struct ocfs2_super *osb, |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 1719 | handle_t *handle, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1720 | struct ocfs2_alloc_context *ac, |
| 1721 | u32 bits_wanted, |
| 1722 | u16 *suballoc_bit_start, |
| 1723 | unsigned int *num_bits, |
| 1724 | u64 *blkno_start) |
| 1725 | { |
| 1726 | int status; |
| 1727 | u64 bg_blkno; |
| 1728 | |
| 1729 | BUG_ON(!ac); |
| 1730 | BUG_ON(ac->ac_bits_wanted < (ac->ac_bits_given + bits_wanted)); |
| 1731 | BUG_ON(ac->ac_which != OCFS2_AC_USE_META); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1732 | |
| 1733 | status = ocfs2_claim_suballoc_bits(osb, |
| 1734 | ac, |
Mark Fasheh | da5cbf2 | 2006-10-06 18:34:35 -0700 | [diff] [blame] | 1735 | handle, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1736 | bits_wanted, |
| 1737 | 1, |
| 1738 | suballoc_bit_start, |
| 1739 | num_bits, |
| 1740 | &bg_blkno); |
| 1741 | if (status < 0) { |
| 1742 | mlog_errno(status); |
| 1743 | goto bail; |
| 1744 | } |
| 1745 | atomic_inc(&osb->alloc_stats.bg_allocs); |
| 1746 | |
| 1747 | *blkno_start = bg_blkno + (u64) *suballoc_bit_start; |
| 1748 | ac->ac_bits_given += (*num_bits); |
| 1749 | status = 0; |
| 1750 | bail: |
| 1751 | mlog_exit(status); |
| 1752 | return status; |
| 1753 | } |
| 1754 | |
Tao Ma | 1382115 | 2009-02-25 00:53:23 +0800 | [diff] [blame] | 1755 | static void ocfs2_init_inode_ac_group(struct inode *dir, |
| 1756 | struct buffer_head *parent_fe_bh, |
| 1757 | struct ocfs2_alloc_context *ac) |
| 1758 | { |
| 1759 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *)parent_fe_bh->b_data; |
| 1760 | /* |
| 1761 | * Try to allocate inodes from some specific group. |
| 1762 | * |
| 1763 | * If the parent dir has recorded the last group used in allocation, |
| 1764 | * cool, use it. Otherwise if we try to allocate new inode from the |
| 1765 | * same slot the parent dir belongs to, use the same chunk. |
| 1766 | * |
| 1767 | * We are very careful here to avoid the mistake of setting |
| 1768 | * ac_last_group to a group descriptor from a different (unlocked) slot. |
| 1769 | */ |
| 1770 | if (OCFS2_I(dir)->ip_last_used_group && |
| 1771 | OCFS2_I(dir)->ip_last_used_slot == ac->ac_alloc_slot) |
| 1772 | ac->ac_last_group = OCFS2_I(dir)->ip_last_used_group; |
| 1773 | else if (le16_to_cpu(fe->i_suballoc_slot) == ac->ac_alloc_slot) |
| 1774 | ac->ac_last_group = ocfs2_which_suballoc_group( |
| 1775 | le64_to_cpu(fe->i_blkno), |
| 1776 | le16_to_cpu(fe->i_suballoc_bit)); |
| 1777 | } |
| 1778 | |
| 1779 | static inline void ocfs2_save_inode_ac_group(struct inode *dir, |
| 1780 | struct ocfs2_alloc_context *ac) |
| 1781 | { |
| 1782 | OCFS2_I(dir)->ip_last_used_group = ac->ac_last_group; |
| 1783 | OCFS2_I(dir)->ip_last_used_slot = ac->ac_alloc_slot; |
| 1784 | } |
| 1785 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1786 | int ocfs2_claim_new_inode(struct ocfs2_super *osb, |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 1787 | handle_t *handle, |
Tao Ma | 1382115 | 2009-02-25 00:53:23 +0800 | [diff] [blame] | 1788 | struct inode *dir, |
| 1789 | struct buffer_head *parent_fe_bh, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1790 | struct ocfs2_alloc_context *ac, |
| 1791 | u16 *suballoc_bit, |
| 1792 | u64 *fe_blkno) |
| 1793 | { |
| 1794 | int status; |
| 1795 | unsigned int num_bits; |
| 1796 | u64 bg_blkno; |
| 1797 | |
| 1798 | mlog_entry_void(); |
| 1799 | |
| 1800 | BUG_ON(!ac); |
| 1801 | BUG_ON(ac->ac_bits_given != 0); |
| 1802 | BUG_ON(ac->ac_bits_wanted != 1); |
| 1803 | BUG_ON(ac->ac_which != OCFS2_AC_USE_INODE); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1804 | |
Tao Ma | 1382115 | 2009-02-25 00:53:23 +0800 | [diff] [blame] | 1805 | ocfs2_init_inode_ac_group(dir, parent_fe_bh, ac); |
| 1806 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1807 | status = ocfs2_claim_suballoc_bits(osb, |
| 1808 | ac, |
Mark Fasheh | da5cbf2 | 2006-10-06 18:34:35 -0700 | [diff] [blame] | 1809 | handle, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1810 | 1, |
| 1811 | 1, |
| 1812 | suballoc_bit, |
| 1813 | &num_bits, |
| 1814 | &bg_blkno); |
| 1815 | if (status < 0) { |
| 1816 | mlog_errno(status); |
| 1817 | goto bail; |
| 1818 | } |
| 1819 | atomic_inc(&osb->alloc_stats.bg_allocs); |
| 1820 | |
| 1821 | BUG_ON(num_bits != 1); |
| 1822 | |
| 1823 | *fe_blkno = bg_blkno + (u64) (*suballoc_bit); |
| 1824 | ac->ac_bits_given++; |
Tao Ma | 1382115 | 2009-02-25 00:53:23 +0800 | [diff] [blame] | 1825 | ocfs2_save_inode_ac_group(dir, ac); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1826 | status = 0; |
| 1827 | bail: |
| 1828 | mlog_exit(status); |
| 1829 | return status; |
| 1830 | } |
| 1831 | |
| 1832 | /* translate a group desc. blkno and it's bitmap offset into |
| 1833 | * disk cluster offset. */ |
| 1834 | static inline u32 ocfs2_desc_bitmap_to_cluster_off(struct inode *inode, |
| 1835 | u64 bg_blkno, |
| 1836 | u16 bg_bit_off) |
| 1837 | { |
| 1838 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1839 | u32 cluster = 0; |
| 1840 | |
| 1841 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); |
| 1842 | |
| 1843 | if (bg_blkno != osb->first_cluster_group_blkno) |
| 1844 | cluster = ocfs2_blocks_to_clusters(inode->i_sb, bg_blkno); |
| 1845 | cluster += (u32) bg_bit_off; |
| 1846 | return cluster; |
| 1847 | } |
| 1848 | |
| 1849 | /* given a cluster offset, calculate which block group it belongs to |
| 1850 | * and return that block offset. */ |
Tao Ma | d659072 | 2007-12-18 15:47:03 +0800 | [diff] [blame] | 1851 | u64 ocfs2_which_cluster_group(struct inode *inode, u32 cluster) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1852 | { |
| 1853 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1854 | u32 group_no; |
| 1855 | |
| 1856 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); |
| 1857 | |
| 1858 | group_no = cluster / osb->bitmap_cpg; |
| 1859 | if (!group_no) |
| 1860 | return osb->first_cluster_group_blkno; |
| 1861 | return ocfs2_clusters_to_blocks(inode->i_sb, |
| 1862 | group_no * osb->bitmap_cpg); |
| 1863 | } |
| 1864 | |
| 1865 | /* given the block number of a cluster start, calculate which cluster |
| 1866 | * group and descriptor bitmap offset that corresponds to. */ |
| 1867 | static inline void ocfs2_block_to_cluster_group(struct inode *inode, |
| 1868 | u64 data_blkno, |
| 1869 | u64 *bg_blkno, |
| 1870 | u16 *bg_bit_off) |
| 1871 | { |
| 1872 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1873 | u32 data_cluster = ocfs2_blocks_to_clusters(osb->sb, data_blkno); |
| 1874 | |
| 1875 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); |
| 1876 | |
| 1877 | *bg_blkno = ocfs2_which_cluster_group(inode, |
| 1878 | data_cluster); |
| 1879 | |
| 1880 | if (*bg_blkno == osb->first_cluster_group_blkno) |
| 1881 | *bg_bit_off = (u16) data_cluster; |
| 1882 | else |
| 1883 | *bg_bit_off = (u16) ocfs2_blocks_to_clusters(osb->sb, |
| 1884 | data_blkno - *bg_blkno); |
| 1885 | } |
| 1886 | |
| 1887 | /* |
| 1888 | * min_bits - minimum contiguous chunk from this total allocation we |
| 1889 | * can handle. set to what we asked for originally for a full |
| 1890 | * contig. allocation, set to '1' to indicate we can deal with extents |
| 1891 | * of any size. |
| 1892 | */ |
Mark Fasheh | 415cb80 | 2007-09-16 20:10:16 -0700 | [diff] [blame] | 1893 | int __ocfs2_claim_clusters(struct ocfs2_super *osb, |
| 1894 | handle_t *handle, |
| 1895 | struct ocfs2_alloc_context *ac, |
| 1896 | u32 min_clusters, |
| 1897 | u32 max_clusters, |
| 1898 | u32 *cluster_start, |
| 1899 | u32 *num_clusters) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1900 | { |
| 1901 | int status; |
Mark Fasheh | 415cb80 | 2007-09-16 20:10:16 -0700 | [diff] [blame] | 1902 | unsigned int bits_wanted = max_clusters; |
Mark Fasheh | 883d4ca | 2006-06-05 16:41:00 -0400 | [diff] [blame] | 1903 | u64 bg_blkno = 0; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1904 | u16 bg_bit_off; |
| 1905 | |
| 1906 | mlog_entry_void(); |
| 1907 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1908 | BUG_ON(ac->ac_bits_given >= ac->ac_bits_wanted); |
| 1909 | |
| 1910 | BUG_ON(ac->ac_which != OCFS2_AC_USE_LOCAL |
| 1911 | && ac->ac_which != OCFS2_AC_USE_MAIN); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1912 | |
| 1913 | if (ac->ac_which == OCFS2_AC_USE_LOCAL) { |
| 1914 | status = ocfs2_claim_local_alloc_bits(osb, |
| 1915 | handle, |
| 1916 | ac, |
| 1917 | bits_wanted, |
| 1918 | cluster_start, |
| 1919 | num_clusters); |
| 1920 | if (!status) |
| 1921 | atomic_inc(&osb->alloc_stats.local_data); |
| 1922 | } else { |
| 1923 | if (min_clusters > (osb->bitmap_cpg - 1)) { |
| 1924 | /* The only paths asking for contiguousness |
| 1925 | * should know about this already. */ |
Sunil Mushran | 2fbe8d1 | 2007-12-20 14:58:11 -0800 | [diff] [blame] | 1926 | mlog(ML_ERROR, "minimum allocation requested %u exceeds " |
| 1927 | "group bitmap size %u!\n", min_clusters, |
| 1928 | osb->bitmap_cpg); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1929 | status = -ENOSPC; |
| 1930 | goto bail; |
| 1931 | } |
| 1932 | /* clamp the current request down to a realistic size. */ |
| 1933 | if (bits_wanted > (osb->bitmap_cpg - 1)) |
| 1934 | bits_wanted = osb->bitmap_cpg - 1; |
| 1935 | |
| 1936 | status = ocfs2_claim_suballoc_bits(osb, |
| 1937 | ac, |
Mark Fasheh | da5cbf2 | 2006-10-06 18:34:35 -0700 | [diff] [blame] | 1938 | handle, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1939 | bits_wanted, |
| 1940 | min_clusters, |
| 1941 | &bg_bit_off, |
| 1942 | num_clusters, |
| 1943 | &bg_blkno); |
| 1944 | if (!status) { |
| 1945 | *cluster_start = |
| 1946 | ocfs2_desc_bitmap_to_cluster_off(ac->ac_inode, |
| 1947 | bg_blkno, |
| 1948 | bg_bit_off); |
| 1949 | atomic_inc(&osb->alloc_stats.bitmap_data); |
| 1950 | } |
| 1951 | } |
| 1952 | if (status < 0) { |
| 1953 | if (status != -ENOSPC) |
| 1954 | mlog_errno(status); |
| 1955 | goto bail; |
| 1956 | } |
| 1957 | |
| 1958 | ac->ac_bits_given += *num_clusters; |
| 1959 | |
| 1960 | bail: |
| 1961 | mlog_exit(status); |
| 1962 | return status; |
| 1963 | } |
| 1964 | |
Mark Fasheh | 415cb80 | 2007-09-16 20:10:16 -0700 | [diff] [blame] | 1965 | int ocfs2_claim_clusters(struct ocfs2_super *osb, |
| 1966 | handle_t *handle, |
| 1967 | struct ocfs2_alloc_context *ac, |
| 1968 | u32 min_clusters, |
| 1969 | u32 *cluster_start, |
| 1970 | u32 *num_clusters) |
| 1971 | { |
| 1972 | unsigned int bits_wanted = ac->ac_bits_wanted - ac->ac_bits_given; |
| 1973 | |
| 1974 | return __ocfs2_claim_clusters(osb, handle, ac, min_clusters, |
| 1975 | bits_wanted, cluster_start, num_clusters); |
| 1976 | } |
| 1977 | |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 1978 | static inline int ocfs2_block_group_clear_bits(handle_t *handle, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1979 | struct inode *alloc_inode, |
| 1980 | struct ocfs2_group_desc *bg, |
| 1981 | struct buffer_head *group_bh, |
| 1982 | unsigned int bit_off, |
| 1983 | unsigned int num_bits) |
| 1984 | { |
| 1985 | int status; |
| 1986 | unsigned int tmp; |
| 1987 | int journal_type = OCFS2_JOURNAL_ACCESS_WRITE; |
| 1988 | struct ocfs2_group_desc *undo_bg = NULL; |
Sunil Mushran | 94e41ec | 2009-06-19 14:45:54 -0700 | [diff] [blame] | 1989 | int cluster_bitmap = 0; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1990 | |
| 1991 | mlog_entry_void(); |
| 1992 | |
Joel Becker | 4203530 | 2008-11-13 14:49:15 -0800 | [diff] [blame] | 1993 | /* The caller got this descriptor from |
| 1994 | * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ |
| 1995 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1996 | |
| 1997 | mlog(0, "off = %u, num = %u\n", bit_off, num_bits); |
| 1998 | |
| 1999 | if (ocfs2_is_cluster_bitmap(alloc_inode)) |
| 2000 | journal_type = OCFS2_JOURNAL_ACCESS_UNDO; |
| 2001 | |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 2002 | status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), |
| 2003 | group_bh, journal_type); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2004 | if (status < 0) { |
| 2005 | mlog_errno(status); |
| 2006 | goto bail; |
| 2007 | } |
| 2008 | |
| 2009 | if (ocfs2_is_cluster_bitmap(alloc_inode)) |
Sunil Mushran | 94e41ec | 2009-06-19 14:45:54 -0700 | [diff] [blame] | 2010 | cluster_bitmap = 1; |
| 2011 | |
| 2012 | if (cluster_bitmap) { |
| 2013 | jbd_lock_bh_state(group_bh); |
| 2014 | undo_bg = (struct ocfs2_group_desc *) |
| 2015 | bh2jh(group_bh)->b_committed_data; |
| 2016 | BUG_ON(!undo_bg); |
| 2017 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2018 | |
| 2019 | tmp = num_bits; |
| 2020 | while(tmp--) { |
| 2021 | ocfs2_clear_bit((bit_off + tmp), |
| 2022 | (unsigned long *) bg->bg_bitmap); |
Sunil Mushran | 94e41ec | 2009-06-19 14:45:54 -0700 | [diff] [blame] | 2023 | if (cluster_bitmap) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2024 | ocfs2_set_bit(bit_off + tmp, |
| 2025 | (unsigned long *) undo_bg->bg_bitmap); |
| 2026 | } |
| 2027 | le16_add_cpu(&bg->bg_free_bits_count, num_bits); |
| 2028 | |
Sunil Mushran | 94e41ec | 2009-06-19 14:45:54 -0700 | [diff] [blame] | 2029 | if (cluster_bitmap) |
| 2030 | jbd_unlock_bh_state(group_bh); |
| 2031 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2032 | status = ocfs2_journal_dirty(handle, group_bh); |
| 2033 | if (status < 0) |
| 2034 | mlog_errno(status); |
| 2035 | bail: |
| 2036 | return status; |
| 2037 | } |
| 2038 | |
| 2039 | /* |
| 2040 | * expects the suballoc inode to already be locked. |
| 2041 | */ |
Mark Fasheh | 2b60435 | 2007-06-22 15:45:27 -0700 | [diff] [blame] | 2042 | int ocfs2_free_suballoc_bits(handle_t *handle, |
| 2043 | struct inode *alloc_inode, |
| 2044 | struct buffer_head *alloc_bh, |
| 2045 | unsigned int start_bit, |
| 2046 | u64 bg_blkno, |
| 2047 | unsigned int count) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2048 | { |
| 2049 | int status = 0; |
| 2050 | u32 tmp_used; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2051 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) alloc_bh->b_data; |
| 2052 | struct ocfs2_chain_list *cl = &fe->id2.i_chain; |
| 2053 | struct buffer_head *group_bh = NULL; |
| 2054 | struct ocfs2_group_desc *group; |
| 2055 | |
| 2056 | mlog_entry_void(); |
| 2057 | |
Joel Becker | 10995aa | 2008-11-13 14:49:12 -0800 | [diff] [blame] | 2058 | /* The alloc_bh comes from ocfs2_free_dinode() or |
| 2059 | * ocfs2_free_clusters(). The callers have all locked the |
| 2060 | * allocator and gotten alloc_bh from the lock call. This |
| 2061 | * validates the dinode buffer. Any corruption that has happended |
| 2062 | * is a code bug. */ |
| 2063 | BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2064 | BUG_ON((count + start_bit) > ocfs2_bits_per_group(cl)); |
| 2065 | |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 2066 | mlog(0, "%llu: freeing %u bits from group %llu, starting at %u\n", |
| 2067 | (unsigned long long)OCFS2_I(alloc_inode)->ip_blkno, count, |
| 2068 | (unsigned long long)bg_blkno, start_bit); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2069 | |
Joel Becker | 68f64d4 | 2008-11-13 14:49:14 -0800 | [diff] [blame] | 2070 | status = ocfs2_read_group_descriptor(alloc_inode, fe, bg_blkno, |
| 2071 | &group_bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2072 | if (status < 0) { |
| 2073 | mlog_errno(status); |
| 2074 | goto bail; |
| 2075 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2076 | group = (struct ocfs2_group_desc *) group_bh->b_data; |
Joel Becker | 68f64d4 | 2008-11-13 14:49:14 -0800 | [diff] [blame] | 2077 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2078 | BUG_ON((count + start_bit) > le16_to_cpu(group->bg_bits)); |
| 2079 | |
| 2080 | status = ocfs2_block_group_clear_bits(handle, alloc_inode, |
| 2081 | group, group_bh, |
| 2082 | start_bit, count); |
| 2083 | if (status < 0) { |
| 2084 | mlog_errno(status); |
| 2085 | goto bail; |
| 2086 | } |
| 2087 | |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 2088 | status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), |
| 2089 | alloc_bh, OCFS2_JOURNAL_ACCESS_WRITE); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2090 | if (status < 0) { |
| 2091 | mlog_errno(status); |
| 2092 | goto bail; |
| 2093 | } |
| 2094 | |
| 2095 | le32_add_cpu(&cl->cl_recs[le16_to_cpu(group->bg_chain)].c_free, |
| 2096 | count); |
| 2097 | tmp_used = le32_to_cpu(fe->id1.bitmap1.i_used); |
| 2098 | fe->id1.bitmap1.i_used = cpu_to_le32(tmp_used - count); |
| 2099 | |
| 2100 | status = ocfs2_journal_dirty(handle, alloc_bh); |
| 2101 | if (status < 0) { |
| 2102 | mlog_errno(status); |
| 2103 | goto bail; |
| 2104 | } |
| 2105 | |
| 2106 | bail: |
Mark Fasheh | a81cb88 | 2008-10-07 14:25:16 -0700 | [diff] [blame] | 2107 | brelse(group_bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2108 | |
| 2109 | mlog_exit(status); |
| 2110 | return status; |
| 2111 | } |
| 2112 | |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 2113 | int ocfs2_free_dinode(handle_t *handle, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2114 | struct inode *inode_alloc_inode, |
| 2115 | struct buffer_head *inode_alloc_bh, |
| 2116 | struct ocfs2_dinode *di) |
| 2117 | { |
| 2118 | u64 blk = le64_to_cpu(di->i_blkno); |
| 2119 | u16 bit = le16_to_cpu(di->i_suballoc_bit); |
| 2120 | u64 bg_blkno = ocfs2_which_suballoc_group(blk, bit); |
| 2121 | |
| 2122 | return ocfs2_free_suballoc_bits(handle, inode_alloc_inode, |
| 2123 | inode_alloc_bh, bit, bg_blkno, 1); |
| 2124 | } |
| 2125 | |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 2126 | int ocfs2_free_clusters(handle_t *handle, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2127 | struct inode *bitmap_inode, |
| 2128 | struct buffer_head *bitmap_bh, |
| 2129 | u64 start_blk, |
| 2130 | unsigned int num_clusters) |
| 2131 | { |
| 2132 | int status; |
| 2133 | u16 bg_start_bit; |
| 2134 | u64 bg_blkno; |
| 2135 | struct ocfs2_dinode *fe; |
| 2136 | |
| 2137 | /* You can't ever have a contiguous set of clusters |
| 2138 | * bigger than a block group bitmap so we never have to worry |
| 2139 | * about looping on them. */ |
| 2140 | |
| 2141 | mlog_entry_void(); |
| 2142 | |
| 2143 | /* This is expensive. We can safely remove once this stuff has |
| 2144 | * gotten tested really well. */ |
| 2145 | BUG_ON(start_blk != ocfs2_clusters_to_blocks(bitmap_inode->i_sb, ocfs2_blocks_to_clusters(bitmap_inode->i_sb, start_blk))); |
| 2146 | |
| 2147 | fe = (struct ocfs2_dinode *) bitmap_bh->b_data; |
| 2148 | |
| 2149 | ocfs2_block_to_cluster_group(bitmap_inode, start_blk, &bg_blkno, |
| 2150 | &bg_start_bit); |
| 2151 | |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 2152 | mlog(0, "want to free %u clusters starting at block %llu\n", |
| 2153 | num_clusters, (unsigned long long)start_blk); |
| 2154 | mlog(0, "bg_blkno = %llu, bg_start_bit = %u\n", |
| 2155 | (unsigned long long)bg_blkno, bg_start_bit); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2156 | |
| 2157 | status = ocfs2_free_suballoc_bits(handle, bitmap_inode, bitmap_bh, |
| 2158 | bg_start_bit, bg_blkno, |
| 2159 | num_clusters); |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 2160 | if (status < 0) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2161 | mlog_errno(status); |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 2162 | goto out; |
| 2163 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2164 | |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 2165 | ocfs2_local_alloc_seen_free_bits(OCFS2_SB(bitmap_inode->i_sb), |
| 2166 | num_clusters); |
| 2167 | |
| 2168 | out: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2169 | mlog_exit(status); |
| 2170 | return status; |
| 2171 | } |
| 2172 | |
| 2173 | static inline void ocfs2_debug_bg(struct ocfs2_group_desc *bg) |
| 2174 | { |
| 2175 | printk("Block Group:\n"); |
| 2176 | printk("bg_signature: %s\n", bg->bg_signature); |
| 2177 | printk("bg_size: %u\n", bg->bg_size); |
| 2178 | printk("bg_bits: %u\n", bg->bg_bits); |
| 2179 | printk("bg_free_bits_count: %u\n", bg->bg_free_bits_count); |
| 2180 | printk("bg_chain: %u\n", bg->bg_chain); |
| 2181 | printk("bg_generation: %u\n", le32_to_cpu(bg->bg_generation)); |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 2182 | printk("bg_next_group: %llu\n", |
| 2183 | (unsigned long long)bg->bg_next_group); |
| 2184 | printk("bg_parent_dinode: %llu\n", |
| 2185 | (unsigned long long)bg->bg_parent_dinode); |
| 2186 | printk("bg_blkno: %llu\n", |
| 2187 | (unsigned long long)bg->bg_blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2188 | } |
| 2189 | |
| 2190 | static inline void ocfs2_debug_suballoc_inode(struct ocfs2_dinode *fe) |
| 2191 | { |
| 2192 | int i; |
| 2193 | |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 2194 | printk("Suballoc Inode %llu:\n", (unsigned long long)fe->i_blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2195 | printk("i_signature: %s\n", fe->i_signature); |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 2196 | printk("i_size: %llu\n", |
| 2197 | (unsigned long long)fe->i_size); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2198 | printk("i_clusters: %u\n", fe->i_clusters); |
| 2199 | printk("i_generation: %u\n", |
| 2200 | le32_to_cpu(fe->i_generation)); |
| 2201 | printk("id1.bitmap1.i_used: %u\n", |
| 2202 | le32_to_cpu(fe->id1.bitmap1.i_used)); |
| 2203 | printk("id1.bitmap1.i_total: %u\n", |
| 2204 | le32_to_cpu(fe->id1.bitmap1.i_total)); |
| 2205 | printk("id2.i_chain.cl_cpg: %u\n", fe->id2.i_chain.cl_cpg); |
| 2206 | printk("id2.i_chain.cl_bpc: %u\n", fe->id2.i_chain.cl_bpc); |
| 2207 | printk("id2.i_chain.cl_count: %u\n", fe->id2.i_chain.cl_count); |
| 2208 | printk("id2.i_chain.cl_next_free_rec: %u\n", |
| 2209 | fe->id2.i_chain.cl_next_free_rec); |
| 2210 | for(i = 0; i < fe->id2.i_chain.cl_next_free_rec; i++) { |
| 2211 | printk("fe->id2.i_chain.cl_recs[%d].c_free: %u\n", i, |
| 2212 | fe->id2.i_chain.cl_recs[i].c_free); |
| 2213 | printk("fe->id2.i_chain.cl_recs[%d].c_total: %u\n", i, |
| 2214 | fe->id2.i_chain.cl_recs[i].c_total); |
Mark Fasheh | b0697053 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 2215 | printk("fe->id2.i_chain.cl_recs[%d].c_blkno: %llu\n", i, |
| 2216 | (unsigned long long)fe->id2.i_chain.cl_recs[i].c_blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2217 | } |
| 2218 | } |
Tao Ma | e7d4cb6 | 2008-08-18 17:38:44 +0800 | [diff] [blame] | 2219 | |
| 2220 | /* |
| 2221 | * For a given allocation, determine which allocators will need to be |
| 2222 | * accessed, and lock them, reserving the appropriate number of bits. |
| 2223 | * |
| 2224 | * Sparse file systems call this from ocfs2_write_begin_nolock() |
| 2225 | * and ocfs2_allocate_unwritten_extents(). |
| 2226 | * |
| 2227 | * File systems which don't support holes call this from |
| 2228 | * ocfs2_extend_allocation(). |
| 2229 | */ |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 2230 | int ocfs2_lock_allocators(struct inode *inode, |
| 2231 | struct ocfs2_extent_tree *et, |
Tao Ma | e7d4cb6 | 2008-08-18 17:38:44 +0800 | [diff] [blame] | 2232 | u32 clusters_to_add, u32 extents_to_split, |
| 2233 | struct ocfs2_alloc_context **data_ac, |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 2234 | struct ocfs2_alloc_context **meta_ac) |
Tao Ma | e7d4cb6 | 2008-08-18 17:38:44 +0800 | [diff] [blame] | 2235 | { |
| 2236 | int ret = 0, num_free_extents; |
| 2237 | unsigned int max_recs_needed = clusters_to_add + 2 * extents_to_split; |
| 2238 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 2239 | |
| 2240 | *meta_ac = NULL; |
| 2241 | if (data_ac) |
| 2242 | *data_ac = NULL; |
| 2243 | |
| 2244 | BUG_ON(clusters_to_add != 0 && data_ac == NULL); |
| 2245 | |
Joel Becker | 3d03a30 | 2009-02-12 17:49:26 -0800 | [diff] [blame] | 2246 | num_free_extents = ocfs2_num_free_extents(osb, et); |
Tao Ma | e7d4cb6 | 2008-08-18 17:38:44 +0800 | [diff] [blame] | 2247 | if (num_free_extents < 0) { |
| 2248 | ret = num_free_extents; |
| 2249 | mlog_errno(ret); |
| 2250 | goto out; |
| 2251 | } |
| 2252 | |
| 2253 | /* |
| 2254 | * Sparse allocation file systems need to be more conservative |
| 2255 | * with reserving room for expansion - the actual allocation |
| 2256 | * happens while we've got a journal handle open so re-taking |
| 2257 | * a cluster lock (because we ran out of room for another |
| 2258 | * extent) will violate ordering rules. |
| 2259 | * |
| 2260 | * Most of the time we'll only be seeing this 1 cluster at a time |
| 2261 | * anyway. |
| 2262 | * |
| 2263 | * Always lock for any unwritten extents - we might want to |
| 2264 | * add blocks during a split. |
| 2265 | */ |
| 2266 | if (!num_free_extents || |
| 2267 | (ocfs2_sparse_alloc(osb) && num_free_extents < max_recs_needed)) { |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 2268 | ret = ocfs2_reserve_new_metadata(osb, et->et_root_el, meta_ac); |
Tao Ma | e7d4cb6 | 2008-08-18 17:38:44 +0800 | [diff] [blame] | 2269 | if (ret < 0) { |
| 2270 | if (ret != -ENOSPC) |
| 2271 | mlog_errno(ret); |
| 2272 | goto out; |
| 2273 | } |
| 2274 | } |
| 2275 | |
| 2276 | if (clusters_to_add == 0) |
| 2277 | goto out; |
| 2278 | |
| 2279 | ret = ocfs2_reserve_clusters(osb, clusters_to_add, data_ac); |
| 2280 | if (ret < 0) { |
| 2281 | if (ret != -ENOSPC) |
| 2282 | mlog_errno(ret); |
| 2283 | goto out; |
| 2284 | } |
| 2285 | |
| 2286 | out: |
| 2287 | if (ret) { |
| 2288 | if (*meta_ac) { |
| 2289 | ocfs2_free_alloc_context(*meta_ac); |
| 2290 | *meta_ac = NULL; |
| 2291 | } |
| 2292 | |
| 2293 | /* |
| 2294 | * We cannot have an error and a non null *data_ac. |
| 2295 | */ |
| 2296 | } |
| 2297 | |
| 2298 | return ret; |
| 2299 | } |
wengang wang | 6ca497a | 2009-03-06 21:29:10 +0800 | [diff] [blame] | 2300 | |
| 2301 | /* |
| 2302 | * Read the inode specified by blkno to get suballoc_slot and |
| 2303 | * suballoc_bit. |
| 2304 | */ |
| 2305 | static int ocfs2_get_suballoc_slot_bit(struct ocfs2_super *osb, u64 blkno, |
| 2306 | u16 *suballoc_slot, u16 *suballoc_bit) |
| 2307 | { |
| 2308 | int status; |
| 2309 | struct buffer_head *inode_bh = NULL; |
| 2310 | struct ocfs2_dinode *inode_fe; |
| 2311 | |
Joel Becker | 5b09b50 | 2009-04-21 16:31:20 -0700 | [diff] [blame] | 2312 | mlog_entry("blkno: %llu\n", (unsigned long long)blkno); |
wengang wang | 6ca497a | 2009-03-06 21:29:10 +0800 | [diff] [blame] | 2313 | |
| 2314 | /* dirty read disk */ |
| 2315 | status = ocfs2_read_blocks_sync(osb, blkno, 1, &inode_bh); |
| 2316 | if (status < 0) { |
Joel Becker | 5b09b50 | 2009-04-21 16:31:20 -0700 | [diff] [blame] | 2317 | mlog(ML_ERROR, "read block %llu failed %d\n", |
| 2318 | (unsigned long long)blkno, status); |
wengang wang | 6ca497a | 2009-03-06 21:29:10 +0800 | [diff] [blame] | 2319 | goto bail; |
| 2320 | } |
| 2321 | |
| 2322 | inode_fe = (struct ocfs2_dinode *) inode_bh->b_data; |
| 2323 | if (!OCFS2_IS_VALID_DINODE(inode_fe)) { |
Joel Becker | 5b09b50 | 2009-04-21 16:31:20 -0700 | [diff] [blame] | 2324 | mlog(ML_ERROR, "invalid inode %llu requested\n", |
| 2325 | (unsigned long long)blkno); |
wengang wang | 6ca497a | 2009-03-06 21:29:10 +0800 | [diff] [blame] | 2326 | status = -EINVAL; |
| 2327 | goto bail; |
| 2328 | } |
| 2329 | |
Tao Ma | 0fba813 | 2009-03-19 05:08:43 +0800 | [diff] [blame] | 2330 | if (le16_to_cpu(inode_fe->i_suballoc_slot) != (u16)OCFS2_INVALID_SLOT && |
wengang wang | 6ca497a | 2009-03-06 21:29:10 +0800 | [diff] [blame] | 2331 | (u32)le16_to_cpu(inode_fe->i_suballoc_slot) > osb->max_slots - 1) { |
| 2332 | mlog(ML_ERROR, "inode %llu has invalid suballoc slot %u\n", |
Joel Becker | 5b09b50 | 2009-04-21 16:31:20 -0700 | [diff] [blame] | 2333 | (unsigned long long)blkno, |
| 2334 | (u32)le16_to_cpu(inode_fe->i_suballoc_slot)); |
wengang wang | 6ca497a | 2009-03-06 21:29:10 +0800 | [diff] [blame] | 2335 | status = -EINVAL; |
| 2336 | goto bail; |
| 2337 | } |
| 2338 | |
| 2339 | if (suballoc_slot) |
| 2340 | *suballoc_slot = le16_to_cpu(inode_fe->i_suballoc_slot); |
| 2341 | if (suballoc_bit) |
| 2342 | *suballoc_bit = le16_to_cpu(inode_fe->i_suballoc_bit); |
| 2343 | |
| 2344 | bail: |
| 2345 | brelse(inode_bh); |
| 2346 | |
| 2347 | mlog_exit(status); |
| 2348 | return status; |
| 2349 | } |
| 2350 | |
| 2351 | /* |
| 2352 | * test whether bit is SET in allocator bitmap or not. on success, 0 |
| 2353 | * is returned and *res is 1 for SET; 0 otherwise. when fails, errno |
| 2354 | * is returned and *res is meaningless. Call this after you have |
| 2355 | * cluster locked against suballoc, or you may get a result based on |
| 2356 | * non-up2date contents |
| 2357 | */ |
| 2358 | static int ocfs2_test_suballoc_bit(struct ocfs2_super *osb, |
| 2359 | struct inode *suballoc, |
| 2360 | struct buffer_head *alloc_bh, u64 blkno, |
| 2361 | u16 bit, int *res) |
| 2362 | { |
| 2363 | struct ocfs2_dinode *alloc_fe; |
| 2364 | struct ocfs2_group_desc *group; |
| 2365 | struct buffer_head *group_bh = NULL; |
| 2366 | u64 bg_blkno; |
| 2367 | int status; |
| 2368 | |
Joel Becker | 5b09b50 | 2009-04-21 16:31:20 -0700 | [diff] [blame] | 2369 | mlog_entry("blkno: %llu bit: %u\n", (unsigned long long)blkno, |
| 2370 | (unsigned int)bit); |
wengang wang | 6ca497a | 2009-03-06 21:29:10 +0800 | [diff] [blame] | 2371 | |
| 2372 | alloc_fe = (struct ocfs2_dinode *)alloc_bh->b_data; |
| 2373 | if ((bit + 1) > ocfs2_bits_per_group(&alloc_fe->id2.i_chain)) { |
| 2374 | mlog(ML_ERROR, "suballoc bit %u out of range of %u\n", |
| 2375 | (unsigned int)bit, |
| 2376 | ocfs2_bits_per_group(&alloc_fe->id2.i_chain)); |
| 2377 | status = -EINVAL; |
| 2378 | goto bail; |
| 2379 | } |
| 2380 | |
| 2381 | bg_blkno = ocfs2_which_suballoc_group(blkno, bit); |
| 2382 | status = ocfs2_read_group_descriptor(suballoc, alloc_fe, bg_blkno, |
| 2383 | &group_bh); |
| 2384 | if (status < 0) { |
Joel Becker | 5b09b50 | 2009-04-21 16:31:20 -0700 | [diff] [blame] | 2385 | mlog(ML_ERROR, "read group %llu failed %d\n", |
| 2386 | (unsigned long long)bg_blkno, status); |
wengang wang | 6ca497a | 2009-03-06 21:29:10 +0800 | [diff] [blame] | 2387 | goto bail; |
| 2388 | } |
| 2389 | |
| 2390 | group = (struct ocfs2_group_desc *) group_bh->b_data; |
| 2391 | *res = ocfs2_test_bit(bit, (unsigned long *)group->bg_bitmap); |
| 2392 | |
| 2393 | bail: |
| 2394 | brelse(group_bh); |
| 2395 | |
| 2396 | mlog_exit(status); |
| 2397 | return status; |
| 2398 | } |
| 2399 | |
| 2400 | /* |
| 2401 | * Test if the bit representing this inode (blkno) is set in the |
| 2402 | * suballocator. |
| 2403 | * |
| 2404 | * On success, 0 is returned and *res is 1 for SET; 0 otherwise. |
| 2405 | * |
| 2406 | * In the event of failure, a negative value is returned and *res is |
| 2407 | * meaningless. |
| 2408 | * |
| 2409 | * Callers must make sure to hold nfs_sync_lock to prevent |
| 2410 | * ocfs2_delete_inode() on another node from accessing the same |
| 2411 | * suballocator concurrently. |
| 2412 | */ |
| 2413 | int ocfs2_test_inode_bit(struct ocfs2_super *osb, u64 blkno, int *res) |
| 2414 | { |
| 2415 | int status; |
| 2416 | u16 suballoc_bit = 0, suballoc_slot = 0; |
| 2417 | struct inode *inode_alloc_inode; |
| 2418 | struct buffer_head *alloc_bh = NULL; |
| 2419 | |
Joel Becker | 5b09b50 | 2009-04-21 16:31:20 -0700 | [diff] [blame] | 2420 | mlog_entry("blkno: %llu", (unsigned long long)blkno); |
wengang wang | 6ca497a | 2009-03-06 21:29:10 +0800 | [diff] [blame] | 2421 | |
| 2422 | status = ocfs2_get_suballoc_slot_bit(osb, blkno, &suballoc_slot, |
| 2423 | &suballoc_bit); |
| 2424 | if (status < 0) { |
| 2425 | mlog(ML_ERROR, "get alloc slot and bit failed %d\n", status); |
| 2426 | goto bail; |
| 2427 | } |
| 2428 | |
| 2429 | inode_alloc_inode = |
| 2430 | ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE, |
| 2431 | suballoc_slot); |
| 2432 | if (!inode_alloc_inode) { |
| 2433 | /* the error code could be inaccurate, but we are not able to |
| 2434 | * get the correct one. */ |
| 2435 | status = -EINVAL; |
| 2436 | mlog(ML_ERROR, "unable to get alloc inode in slot %u\n", |
| 2437 | (u32)suballoc_slot); |
| 2438 | goto bail; |
| 2439 | } |
| 2440 | |
| 2441 | mutex_lock(&inode_alloc_inode->i_mutex); |
| 2442 | status = ocfs2_inode_lock(inode_alloc_inode, &alloc_bh, 0); |
| 2443 | if (status < 0) { |
| 2444 | mutex_unlock(&inode_alloc_inode->i_mutex); |
| 2445 | mlog(ML_ERROR, "lock on alloc inode on slot %u failed %d\n", |
| 2446 | (u32)suballoc_slot, status); |
| 2447 | goto bail; |
| 2448 | } |
| 2449 | |
| 2450 | status = ocfs2_test_suballoc_bit(osb, inode_alloc_inode, alloc_bh, |
| 2451 | blkno, suballoc_bit, res); |
| 2452 | if (status < 0) |
| 2453 | mlog(ML_ERROR, "test suballoc bit failed %d\n", status); |
| 2454 | |
| 2455 | ocfs2_inode_unlock(inode_alloc_inode, 0); |
| 2456 | mutex_unlock(&inode_alloc_inode->i_mutex); |
| 2457 | |
| 2458 | iput(inode_alloc_inode); |
| 2459 | brelse(alloc_bh); |
| 2460 | bail: |
| 2461 | mlog_exit(status); |
| 2462 | return status; |
| 2463 | } |