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 | * localalloc.c |
| 5 | * |
| 6 | * Node local data allocation |
| 7 | * |
| 8 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public |
| 12 | * License as published by the Free Software Foundation; either |
| 13 | * version 2 of the License, or (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | * General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public |
| 21 | * License along with this program; if not, write to the |
| 22 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 23 | * Boston, MA 021110-1307, USA. |
| 24 | */ |
| 25 | |
| 26 | #include <linux/fs.h> |
| 27 | #include <linux/types.h> |
| 28 | #include <linux/slab.h> |
| 29 | #include <linux/highmem.h> |
| 30 | #include <linux/bitops.h> |
Mark Fasheh | 9a8ff57 | 2008-07-29 18:29:18 -0700 | [diff] [blame] | 31 | #include <linux/debugfs.h> |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 32 | |
| 33 | #define MLOG_MASK_PREFIX ML_DISK_ALLOC |
| 34 | #include <cluster/masklog.h> |
| 35 | |
| 36 | #include "ocfs2.h" |
| 37 | |
| 38 | #include "alloc.h" |
| 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 | |
| 47 | #include "buffer_head_io.h" |
| 48 | |
| 49 | #define OCFS2_LOCAL_ALLOC(dinode) (&((dinode)->id2.i_lab)) |
| 50 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 51 | static u32 ocfs2_local_alloc_count_bits(struct ocfs2_dinode *alloc); |
| 52 | |
| 53 | static int ocfs2_local_alloc_find_clear_bits(struct ocfs2_super *osb, |
| 54 | struct ocfs2_dinode *alloc, |
| 55 | u32 numbits); |
| 56 | |
| 57 | static void ocfs2_clear_local_alloc(struct ocfs2_dinode *alloc); |
| 58 | |
| 59 | static int ocfs2_sync_local_to_main(struct ocfs2_super *osb, |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 60 | handle_t *handle, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 61 | struct ocfs2_dinode *alloc, |
| 62 | struct inode *main_bm_inode, |
| 63 | struct buffer_head *main_bm_bh); |
| 64 | |
| 65 | static int ocfs2_local_alloc_reserve_for_window(struct ocfs2_super *osb, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 66 | struct ocfs2_alloc_context **ac, |
| 67 | struct inode **bitmap_inode, |
| 68 | struct buffer_head **bitmap_bh); |
| 69 | |
| 70 | static int ocfs2_local_alloc_new_window(struct ocfs2_super *osb, |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 71 | handle_t *handle, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 72 | struct ocfs2_alloc_context *ac); |
| 73 | |
| 74 | static int ocfs2_local_alloc_slide_window(struct ocfs2_super *osb, |
| 75 | struct inode *local_alloc_inode); |
| 76 | |
Mark Fasheh | 9a8ff57 | 2008-07-29 18:29:18 -0700 | [diff] [blame] | 77 | #ifdef CONFIG_OCFS2_FS_STATS |
| 78 | |
| 79 | DEFINE_MUTEX(la_debug_mutex); |
| 80 | |
| 81 | static int ocfs2_la_debug_open(struct inode *inode, struct file *file) |
| 82 | { |
| 83 | file->private_data = inode->i_private; |
| 84 | return 0; |
| 85 | } |
| 86 | |
| 87 | #define LA_DEBUG_BUF_SZ PAGE_CACHE_SIZE |
| 88 | #define LA_DEBUG_VER 1 |
| 89 | static ssize_t ocfs2_la_debug_read(struct file *file, char __user *userbuf, |
| 90 | size_t count, loff_t *ppos) |
| 91 | { |
| 92 | struct ocfs2_super *osb = file->private_data; |
| 93 | int written, ret; |
| 94 | char *buf = osb->local_alloc_debug_buf; |
| 95 | |
| 96 | mutex_lock(&la_debug_mutex); |
| 97 | memset(buf, 0, LA_DEBUG_BUF_SZ); |
| 98 | |
| 99 | written = snprintf(buf, LA_DEBUG_BUF_SZ, |
| 100 | "0x%x\t0x%llx\t%u\t%u\t0x%x\n", |
| 101 | LA_DEBUG_VER, |
| 102 | (unsigned long long)osb->la_last_gd, |
| 103 | osb->local_alloc_default_bits, |
| 104 | osb->local_alloc_bits, osb->local_alloc_state); |
| 105 | |
| 106 | ret = simple_read_from_buffer(userbuf, count, ppos, buf, written); |
| 107 | |
| 108 | mutex_unlock(&la_debug_mutex); |
| 109 | return ret; |
| 110 | } |
| 111 | |
| 112 | static const struct file_operations ocfs2_la_debug_fops = { |
| 113 | .open = ocfs2_la_debug_open, |
| 114 | .read = ocfs2_la_debug_read, |
| 115 | }; |
| 116 | |
| 117 | static void ocfs2_init_la_debug(struct ocfs2_super *osb) |
| 118 | { |
| 119 | osb->local_alloc_debug_buf = kmalloc(LA_DEBUG_BUF_SZ, GFP_NOFS); |
| 120 | if (!osb->local_alloc_debug_buf) |
| 121 | return; |
| 122 | |
| 123 | osb->local_alloc_debug = debugfs_create_file("local_alloc_stats", |
| 124 | S_IFREG|S_IRUSR, |
| 125 | osb->osb_debug_root, |
| 126 | osb, |
| 127 | &ocfs2_la_debug_fops); |
| 128 | if (!osb->local_alloc_debug) { |
| 129 | kfree(osb->local_alloc_debug_buf); |
| 130 | osb->local_alloc_debug_buf = NULL; |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | static void ocfs2_shutdown_la_debug(struct ocfs2_super *osb) |
| 135 | { |
| 136 | if (osb->local_alloc_debug) |
| 137 | debugfs_remove(osb->local_alloc_debug); |
| 138 | |
| 139 | if (osb->local_alloc_debug_buf) |
| 140 | kfree(osb->local_alloc_debug_buf); |
| 141 | |
| 142 | osb->local_alloc_debug_buf = NULL; |
| 143 | osb->local_alloc_debug = NULL; |
| 144 | } |
| 145 | #else /* CONFIG_OCFS2_FS_STATS */ |
| 146 | static void ocfs2_init_la_debug(struct ocfs2_super *osb) |
| 147 | { |
| 148 | return; |
| 149 | } |
| 150 | static void ocfs2_shutdown_la_debug(struct ocfs2_super *osb) |
| 151 | { |
| 152 | return; |
| 153 | } |
| 154 | #endif |
| 155 | |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 156 | static inline int ocfs2_la_state_enabled(struct ocfs2_super *osb) |
| 157 | { |
| 158 | return (osb->local_alloc_state == OCFS2_LA_THROTTLED || |
| 159 | osb->local_alloc_state == OCFS2_LA_ENABLED); |
| 160 | } |
| 161 | |
| 162 | void ocfs2_local_alloc_seen_free_bits(struct ocfs2_super *osb, |
| 163 | unsigned int num_clusters) |
| 164 | { |
| 165 | spin_lock(&osb->osb_lock); |
| 166 | if (osb->local_alloc_state == OCFS2_LA_DISABLED || |
| 167 | osb->local_alloc_state == OCFS2_LA_THROTTLED) |
| 168 | if (num_clusters >= osb->local_alloc_default_bits) { |
| 169 | cancel_delayed_work(&osb->la_enable_wq); |
| 170 | osb->local_alloc_state = OCFS2_LA_ENABLED; |
| 171 | } |
| 172 | spin_unlock(&osb->osb_lock); |
| 173 | } |
| 174 | |
| 175 | void ocfs2_la_enable_worker(struct work_struct *work) |
| 176 | { |
| 177 | struct ocfs2_super *osb = |
| 178 | container_of(work, struct ocfs2_super, |
| 179 | la_enable_wq.work); |
| 180 | spin_lock(&osb->osb_lock); |
| 181 | osb->local_alloc_state = OCFS2_LA_ENABLED; |
| 182 | spin_unlock(&osb->osb_lock); |
| 183 | } |
| 184 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 185 | /* |
| 186 | * Tell us whether a given allocation should use the local alloc |
| 187 | * file. Otherwise, it has to go to the main bitmap. |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 188 | * |
| 189 | * This function does semi-dirty reads of local alloc size and state! |
| 190 | * This is ok however, as the values are re-checked once under mutex. |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 191 | */ |
| 192 | int ocfs2_alloc_should_use_local(struct ocfs2_super *osb, u64 bits) |
| 193 | { |
Sunil Mushran | 2fbe8d1 | 2007-12-20 14:58:11 -0800 | [diff] [blame] | 194 | int ret = 0; |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 195 | int la_bits; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 196 | |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 197 | spin_lock(&osb->osb_lock); |
| 198 | la_bits = osb->local_alloc_bits; |
| 199 | |
| 200 | if (!ocfs2_la_state_enabled(osb)) |
Sunil Mushran | 2fbe8d1 | 2007-12-20 14:58:11 -0800 | [diff] [blame] | 201 | goto bail; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 202 | |
| 203 | /* la_bits should be at least twice the size (in clusters) of |
| 204 | * a new block group. We want to be sure block group |
| 205 | * allocations go through the local alloc, so allow an |
| 206 | * allocation to take up to half the bitmap. */ |
| 207 | if (bits > (la_bits / 2)) |
Sunil Mushran | 2fbe8d1 | 2007-12-20 14:58:11 -0800 | [diff] [blame] | 208 | goto bail; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 209 | |
Sunil Mushran | 2fbe8d1 | 2007-12-20 14:58:11 -0800 | [diff] [blame] | 210 | ret = 1; |
| 211 | bail: |
| 212 | mlog(0, "state=%d, bits=%llu, la_bits=%d, ret=%d\n", |
| 213 | osb->local_alloc_state, (unsigned long long)bits, la_bits, ret); |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 214 | spin_unlock(&osb->osb_lock); |
Sunil Mushran | 2fbe8d1 | 2007-12-20 14:58:11 -0800 | [diff] [blame] | 215 | return ret; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 216 | } |
| 217 | |
| 218 | int ocfs2_load_local_alloc(struct ocfs2_super *osb) |
| 219 | { |
| 220 | int status = 0; |
| 221 | struct ocfs2_dinode *alloc = NULL; |
| 222 | struct buffer_head *alloc_bh = NULL; |
| 223 | u32 num_used; |
| 224 | struct inode *inode = NULL; |
| 225 | struct ocfs2_local_alloc *la; |
| 226 | |
| 227 | mlog_entry_void(); |
| 228 | |
Mark Fasheh | 9a8ff57 | 2008-07-29 18:29:18 -0700 | [diff] [blame] | 229 | ocfs2_init_la_debug(osb); |
| 230 | |
Mark Fasheh | ebcee4b | 2008-07-28 14:55:20 -0700 | [diff] [blame] | 231 | if (osb->local_alloc_bits == 0) |
Sunil Mushran | 2fbe8d1 | 2007-12-20 14:58:11 -0800 | [diff] [blame] | 232 | goto bail; |
| 233 | |
Mark Fasheh | ebcee4b | 2008-07-28 14:55:20 -0700 | [diff] [blame] | 234 | if (osb->local_alloc_bits >= osb->bitmap_cpg) { |
Sunil Mushran | 2fbe8d1 | 2007-12-20 14:58:11 -0800 | [diff] [blame] | 235 | mlog(ML_NOTICE, "Requested local alloc window %d is larger " |
| 236 | "than max possible %u. Using defaults.\n", |
Mark Fasheh | ebcee4b | 2008-07-28 14:55:20 -0700 | [diff] [blame] | 237 | osb->local_alloc_bits, (osb->bitmap_cpg - 1)); |
| 238 | osb->local_alloc_bits = |
| 239 | ocfs2_megabytes_to_clusters(osb->sb, |
| 240 | OCFS2_DEFAULT_LOCAL_ALLOC_SIZE); |
Sunil Mushran | 2fbe8d1 | 2007-12-20 14:58:11 -0800 | [diff] [blame] | 241 | } |
| 242 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 243 | /* read the alloc off disk */ |
| 244 | inode = ocfs2_get_system_file_inode(osb, LOCAL_ALLOC_SYSTEM_INODE, |
| 245 | osb->slot_num); |
| 246 | if (!inode) { |
| 247 | status = -EINVAL; |
| 248 | mlog_errno(status); |
| 249 | goto bail; |
| 250 | } |
| 251 | |
| 252 | status = ocfs2_read_block(osb, OCFS2_I(inode)->ip_blkno, |
| 253 | &alloc_bh, 0, inode); |
| 254 | if (status < 0) { |
| 255 | mlog_errno(status); |
| 256 | goto bail; |
| 257 | } |
| 258 | |
| 259 | alloc = (struct ocfs2_dinode *) alloc_bh->b_data; |
| 260 | la = OCFS2_LOCAL_ALLOC(alloc); |
| 261 | |
| 262 | if (!(le32_to_cpu(alloc->i_flags) & |
| 263 | (OCFS2_LOCAL_ALLOC_FL|OCFS2_BITMAP_FL))) { |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 264 | mlog(ML_ERROR, "Invalid local alloc inode, %llu\n", |
| 265 | (unsigned long long)OCFS2_I(inode)->ip_blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 266 | status = -EINVAL; |
| 267 | goto bail; |
| 268 | } |
| 269 | |
| 270 | if ((la->la_size == 0) || |
| 271 | (le16_to_cpu(la->la_size) > ocfs2_local_alloc_size(inode->i_sb))) { |
| 272 | mlog(ML_ERROR, "Local alloc size is invalid (la_size = %u)\n", |
| 273 | le16_to_cpu(la->la_size)); |
| 274 | status = -EINVAL; |
| 275 | goto bail; |
| 276 | } |
| 277 | |
| 278 | /* do a little verification. */ |
| 279 | num_used = ocfs2_local_alloc_count_bits(alloc); |
| 280 | |
| 281 | /* hopefully the local alloc has always been recovered before |
| 282 | * we load it. */ |
| 283 | if (num_used |
| 284 | || alloc->id1.bitmap1.i_used |
| 285 | || alloc->id1.bitmap1.i_total |
| 286 | || la->la_bm_off) |
| 287 | mlog(ML_ERROR, "Local alloc hasn't been recovered!\n" |
| 288 | "found = %u, set = %u, taken = %u, off = %u\n", |
| 289 | num_used, le32_to_cpu(alloc->id1.bitmap1.i_used), |
| 290 | le32_to_cpu(alloc->id1.bitmap1.i_total), |
| 291 | OCFS2_LOCAL_ALLOC(alloc)->la_bm_off); |
| 292 | |
| 293 | osb->local_alloc_bh = alloc_bh; |
| 294 | osb->local_alloc_state = OCFS2_LA_ENABLED; |
| 295 | |
| 296 | bail: |
| 297 | if (status < 0) |
| 298 | if (alloc_bh) |
| 299 | brelse(alloc_bh); |
| 300 | if (inode) |
| 301 | iput(inode); |
| 302 | |
Mark Fasheh | 9a8ff57 | 2008-07-29 18:29:18 -0700 | [diff] [blame] | 303 | if (status < 0) |
| 304 | ocfs2_shutdown_la_debug(osb); |
| 305 | |
Mark Fasheh | ebcee4b | 2008-07-28 14:55:20 -0700 | [diff] [blame] | 306 | mlog(0, "Local alloc window bits = %d\n", osb->local_alloc_bits); |
Sunil Mushran | 2fbe8d1 | 2007-12-20 14:58:11 -0800 | [diff] [blame] | 307 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 308 | mlog_exit(status); |
| 309 | return status; |
| 310 | } |
| 311 | |
| 312 | /* |
| 313 | * return any unused bits to the bitmap and write out a clean |
| 314 | * local_alloc. |
| 315 | * |
| 316 | * local_alloc_bh is optional. If not passed, we will simply use the |
| 317 | * one off osb. If you do pass it however, be warned that it *will* be |
| 318 | * returned brelse'd and NULL'd out.*/ |
| 319 | void ocfs2_shutdown_local_alloc(struct ocfs2_super *osb) |
| 320 | { |
| 321 | int status; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 322 | handle_t *handle; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 323 | struct inode *local_alloc_inode = NULL; |
| 324 | struct buffer_head *bh = NULL; |
| 325 | struct buffer_head *main_bm_bh = NULL; |
| 326 | struct inode *main_bm_inode = NULL; |
| 327 | struct ocfs2_dinode *alloc_copy = NULL; |
| 328 | struct ocfs2_dinode *alloc = NULL; |
| 329 | |
| 330 | mlog_entry_void(); |
| 331 | |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 332 | cancel_delayed_work(&osb->la_enable_wq); |
| 333 | flush_workqueue(ocfs2_wq); |
| 334 | |
Mark Fasheh | 9a8ff57 | 2008-07-29 18:29:18 -0700 | [diff] [blame] | 335 | ocfs2_shutdown_la_debug(osb); |
| 336 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 337 | if (osb->local_alloc_state == OCFS2_LA_UNUSED) |
Mark Fasheh | 8898a5a | 2006-10-05 15:42:08 -0700 | [diff] [blame] | 338 | goto out; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 339 | |
| 340 | local_alloc_inode = |
| 341 | ocfs2_get_system_file_inode(osb, |
| 342 | LOCAL_ALLOC_SYSTEM_INODE, |
| 343 | osb->slot_num); |
| 344 | if (!local_alloc_inode) { |
| 345 | status = -ENOENT; |
| 346 | mlog_errno(status); |
Mark Fasheh | 8898a5a | 2006-10-05 15:42:08 -0700 | [diff] [blame] | 347 | goto out; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 348 | } |
| 349 | |
| 350 | osb->local_alloc_state = OCFS2_LA_DISABLED; |
| 351 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 352 | main_bm_inode = ocfs2_get_system_file_inode(osb, |
| 353 | GLOBAL_BITMAP_SYSTEM_INODE, |
| 354 | OCFS2_INVALID_SLOT); |
| 355 | if (!main_bm_inode) { |
| 356 | status = -EINVAL; |
| 357 | mlog_errno(status); |
Mark Fasheh | 8898a5a | 2006-10-05 15:42:08 -0700 | [diff] [blame] | 358 | goto out; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 359 | } |
| 360 | |
Mark Fasheh | 8898a5a | 2006-10-05 15:42:08 -0700 | [diff] [blame] | 361 | mutex_lock(&main_bm_inode->i_mutex); |
| 362 | |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 363 | status = ocfs2_inode_lock(main_bm_inode, &main_bm_bh, 1); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 364 | if (status < 0) { |
| 365 | mlog_errno(status); |
Mark Fasheh | 8898a5a | 2006-10-05 15:42:08 -0700 | [diff] [blame] | 366 | goto out_mutex; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 367 | } |
| 368 | |
| 369 | /* WINDOW_MOVE_CREDITS is a bit heavy... */ |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 370 | handle = ocfs2_start_trans(osb, OCFS2_WINDOW_MOVE_CREDITS); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 371 | if (IS_ERR(handle)) { |
| 372 | mlog_errno(PTR_ERR(handle)); |
| 373 | handle = NULL; |
Mark Fasheh | 8898a5a | 2006-10-05 15:42:08 -0700 | [diff] [blame] | 374 | goto out_unlock; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 375 | } |
| 376 | |
| 377 | bh = osb->local_alloc_bh; |
| 378 | alloc = (struct ocfs2_dinode *) bh->b_data; |
| 379 | |
Sunil Mushran | 4ba1c5b | 2008-04-18 15:03:59 -0700 | [diff] [blame] | 380 | alloc_copy = kmalloc(bh->b_size, GFP_NOFS); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 381 | if (!alloc_copy) { |
| 382 | status = -ENOMEM; |
Mark Fasheh | 8898a5a | 2006-10-05 15:42:08 -0700 | [diff] [blame] | 383 | goto out_commit; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 384 | } |
| 385 | memcpy(alloc_copy, alloc, bh->b_size); |
| 386 | |
| 387 | status = ocfs2_journal_access(handle, local_alloc_inode, bh, |
| 388 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 389 | if (status < 0) { |
| 390 | mlog_errno(status); |
Mark Fasheh | 8898a5a | 2006-10-05 15:42:08 -0700 | [diff] [blame] | 391 | goto out_commit; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 392 | } |
| 393 | |
| 394 | ocfs2_clear_local_alloc(alloc); |
| 395 | |
| 396 | status = ocfs2_journal_dirty(handle, bh); |
| 397 | if (status < 0) { |
| 398 | mlog_errno(status); |
Mark Fasheh | 8898a5a | 2006-10-05 15:42:08 -0700 | [diff] [blame] | 399 | goto out_commit; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 400 | } |
| 401 | |
| 402 | brelse(bh); |
| 403 | osb->local_alloc_bh = NULL; |
| 404 | osb->local_alloc_state = OCFS2_LA_UNUSED; |
| 405 | |
| 406 | status = ocfs2_sync_local_to_main(osb, handle, alloc_copy, |
| 407 | main_bm_inode, main_bm_bh); |
| 408 | if (status < 0) |
| 409 | mlog_errno(status); |
| 410 | |
Mark Fasheh | 8898a5a | 2006-10-05 15:42:08 -0700 | [diff] [blame] | 411 | out_commit: |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 412 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 413 | |
Mark Fasheh | 8898a5a | 2006-10-05 15:42:08 -0700 | [diff] [blame] | 414 | out_unlock: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 415 | if (main_bm_bh) |
| 416 | brelse(main_bm_bh); |
| 417 | |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 418 | ocfs2_inode_unlock(main_bm_inode, 1); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 419 | |
Mark Fasheh | 8898a5a | 2006-10-05 15:42:08 -0700 | [diff] [blame] | 420 | out_mutex: |
| 421 | mutex_unlock(&main_bm_inode->i_mutex); |
| 422 | iput(main_bm_inode); |
| 423 | |
| 424 | out: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 425 | if (local_alloc_inode) |
| 426 | iput(local_alloc_inode); |
| 427 | |
| 428 | if (alloc_copy) |
| 429 | kfree(alloc_copy); |
| 430 | |
| 431 | mlog_exit_void(); |
| 432 | } |
| 433 | |
| 434 | /* |
| 435 | * We want to free the bitmap bits outside of any recovery context as |
| 436 | * we'll need a cluster lock to do so, but we must clear the local |
| 437 | * alloc before giving up the recovered nodes journal. To solve this, |
| 438 | * we kmalloc a copy of the local alloc before it's change for the |
| 439 | * caller to process with ocfs2_complete_local_alloc_recovery |
| 440 | */ |
| 441 | int ocfs2_begin_local_alloc_recovery(struct ocfs2_super *osb, |
| 442 | int slot_num, |
| 443 | struct ocfs2_dinode **alloc_copy) |
| 444 | { |
| 445 | int status = 0; |
| 446 | struct buffer_head *alloc_bh = NULL; |
| 447 | struct inode *inode = NULL; |
| 448 | struct ocfs2_dinode *alloc; |
| 449 | |
| 450 | mlog_entry("(slot_num = %d)\n", slot_num); |
| 451 | |
| 452 | *alloc_copy = NULL; |
| 453 | |
| 454 | inode = ocfs2_get_system_file_inode(osb, |
| 455 | LOCAL_ALLOC_SYSTEM_INODE, |
| 456 | slot_num); |
| 457 | if (!inode) { |
| 458 | status = -EINVAL; |
| 459 | mlog_errno(status); |
| 460 | goto bail; |
| 461 | } |
| 462 | |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 463 | mutex_lock(&inode->i_mutex); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 464 | |
| 465 | status = ocfs2_read_block(osb, OCFS2_I(inode)->ip_blkno, |
| 466 | &alloc_bh, 0, inode); |
| 467 | if (status < 0) { |
| 468 | mlog_errno(status); |
| 469 | goto bail; |
| 470 | } |
| 471 | |
| 472 | *alloc_copy = kmalloc(alloc_bh->b_size, GFP_KERNEL); |
| 473 | if (!(*alloc_copy)) { |
| 474 | status = -ENOMEM; |
| 475 | goto bail; |
| 476 | } |
| 477 | memcpy((*alloc_copy), alloc_bh->b_data, alloc_bh->b_size); |
| 478 | |
| 479 | alloc = (struct ocfs2_dinode *) alloc_bh->b_data; |
| 480 | ocfs2_clear_local_alloc(alloc); |
| 481 | |
| 482 | status = ocfs2_write_block(osb, alloc_bh, inode); |
| 483 | if (status < 0) |
| 484 | mlog_errno(status); |
| 485 | |
| 486 | bail: |
| 487 | if ((status < 0) && (*alloc_copy)) { |
| 488 | kfree(*alloc_copy); |
| 489 | *alloc_copy = NULL; |
| 490 | } |
| 491 | |
| 492 | if (alloc_bh) |
| 493 | brelse(alloc_bh); |
| 494 | |
| 495 | if (inode) { |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 496 | mutex_unlock(&inode->i_mutex); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 497 | iput(inode); |
| 498 | } |
| 499 | |
| 500 | mlog_exit(status); |
| 501 | return status; |
| 502 | } |
| 503 | |
| 504 | /* |
| 505 | * Step 2: By now, we've completed the journal recovery, we've stamped |
| 506 | * a clean local alloc on disk and dropped the node out of the |
| 507 | * recovery map. Dlm locks will no longer stall, so lets clear out the |
| 508 | * main bitmap. |
| 509 | */ |
| 510 | int ocfs2_complete_local_alloc_recovery(struct ocfs2_super *osb, |
| 511 | struct ocfs2_dinode *alloc) |
| 512 | { |
| 513 | int status; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 514 | handle_t *handle; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 515 | struct buffer_head *main_bm_bh = NULL; |
Mark Fasheh | 8898a5a | 2006-10-05 15:42:08 -0700 | [diff] [blame] | 516 | struct inode *main_bm_inode; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 517 | |
| 518 | mlog_entry_void(); |
| 519 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 520 | main_bm_inode = ocfs2_get_system_file_inode(osb, |
| 521 | GLOBAL_BITMAP_SYSTEM_INODE, |
| 522 | OCFS2_INVALID_SLOT); |
| 523 | if (!main_bm_inode) { |
| 524 | status = -EINVAL; |
| 525 | mlog_errno(status); |
Mark Fasheh | 8898a5a | 2006-10-05 15:42:08 -0700 | [diff] [blame] | 526 | goto out; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 527 | } |
| 528 | |
Mark Fasheh | 8898a5a | 2006-10-05 15:42:08 -0700 | [diff] [blame] | 529 | mutex_lock(&main_bm_inode->i_mutex); |
| 530 | |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 531 | status = ocfs2_inode_lock(main_bm_inode, &main_bm_bh, 1); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 532 | if (status < 0) { |
| 533 | mlog_errno(status); |
Mark Fasheh | 8898a5a | 2006-10-05 15:42:08 -0700 | [diff] [blame] | 534 | goto out_mutex; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 535 | } |
| 536 | |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 537 | handle = ocfs2_start_trans(osb, OCFS2_WINDOW_MOVE_CREDITS); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 538 | if (IS_ERR(handle)) { |
| 539 | status = PTR_ERR(handle); |
| 540 | handle = NULL; |
| 541 | mlog_errno(status); |
Mark Fasheh | 8898a5a | 2006-10-05 15:42:08 -0700 | [diff] [blame] | 542 | goto out_unlock; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 543 | } |
| 544 | |
| 545 | /* we want the bitmap change to be recorded on disk asap */ |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 546 | handle->h_sync = 1; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 547 | |
| 548 | status = ocfs2_sync_local_to_main(osb, handle, alloc, |
| 549 | main_bm_inode, main_bm_bh); |
| 550 | if (status < 0) |
| 551 | mlog_errno(status); |
| 552 | |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 553 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | 8898a5a | 2006-10-05 15:42:08 -0700 | [diff] [blame] | 554 | |
| 555 | out_unlock: |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 556 | ocfs2_inode_unlock(main_bm_inode, 1); |
Mark Fasheh | 8898a5a | 2006-10-05 15:42:08 -0700 | [diff] [blame] | 557 | |
| 558 | out_mutex: |
| 559 | mutex_unlock(&main_bm_inode->i_mutex); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 560 | |
| 561 | if (main_bm_bh) |
| 562 | brelse(main_bm_bh); |
| 563 | |
Mark Fasheh | 8898a5a | 2006-10-05 15:42:08 -0700 | [diff] [blame] | 564 | iput(main_bm_inode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 565 | |
Mark Fasheh | 8898a5a | 2006-10-05 15:42:08 -0700 | [diff] [blame] | 566 | out: |
Tao Ma | 4d0ddb2 | 2008-03-05 16:11:46 +0800 | [diff] [blame] | 567 | if (!status) |
| 568 | ocfs2_init_inode_steal_slot(osb); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 569 | mlog_exit(status); |
| 570 | return status; |
| 571 | } |
| 572 | |
| 573 | /* |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 574 | * make sure we've got at least bits_wanted contiguous bits in the |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 575 | * local alloc. You lose them when you drop i_mutex. |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 576 | * |
| 577 | * We will add ourselves to the transaction passed in, but may start |
| 578 | * our own in order to shift windows. |
| 579 | */ |
| 580 | int ocfs2_reserve_local_alloc_bits(struct ocfs2_super *osb, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 581 | u32 bits_wanted, |
| 582 | struct ocfs2_alloc_context *ac) |
| 583 | { |
| 584 | int status; |
| 585 | struct ocfs2_dinode *alloc; |
| 586 | struct inode *local_alloc_inode; |
| 587 | unsigned int free_bits; |
| 588 | |
| 589 | mlog_entry_void(); |
| 590 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 591 | BUG_ON(!ac); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 592 | |
| 593 | local_alloc_inode = |
| 594 | ocfs2_get_system_file_inode(osb, |
| 595 | LOCAL_ALLOC_SYSTEM_INODE, |
| 596 | osb->slot_num); |
| 597 | if (!local_alloc_inode) { |
| 598 | status = -ENOENT; |
| 599 | mlog_errno(status); |
| 600 | goto bail; |
| 601 | } |
Mark Fasheh | da5cbf2 | 2006-10-06 18:34:35 -0700 | [diff] [blame] | 602 | |
| 603 | mutex_lock(&local_alloc_inode->i_mutex); |
| 604 | |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 605 | /* |
| 606 | * We must double check state and allocator bits because |
| 607 | * another process may have changed them while holding i_mutex. |
| 608 | */ |
| 609 | spin_lock(&osb->osb_lock); |
| 610 | if (!ocfs2_la_state_enabled(osb) || |
| 611 | (bits_wanted > osb->local_alloc_bits)) { |
| 612 | spin_unlock(&osb->osb_lock); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 613 | status = -ENOSPC; |
| 614 | goto bail; |
| 615 | } |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 616 | spin_unlock(&osb->osb_lock); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 617 | |
| 618 | alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data; |
| 619 | |
Joel Becker | e407e39 | 2008-06-12 22:35:39 -0700 | [diff] [blame] | 620 | #ifdef CONFIG_OCFS2_DEBUG_FS |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 621 | if (le32_to_cpu(alloc->id1.bitmap1.i_used) != |
| 622 | ocfs2_local_alloc_count_bits(alloc)) { |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 623 | ocfs2_error(osb->sb, "local alloc inode %llu says it has " |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 624 | "%u free bits, but a count shows %u", |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 625 | (unsigned long long)le64_to_cpu(alloc->i_blkno), |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 626 | le32_to_cpu(alloc->id1.bitmap1.i_used), |
| 627 | ocfs2_local_alloc_count_bits(alloc)); |
| 628 | status = -EIO; |
| 629 | goto bail; |
| 630 | } |
Jan Kara | 5a58c3e | 2007-11-13 19:59:33 +0100 | [diff] [blame] | 631 | #endif |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 632 | |
| 633 | free_bits = le32_to_cpu(alloc->id1.bitmap1.i_total) - |
| 634 | le32_to_cpu(alloc->id1.bitmap1.i_used); |
| 635 | if (bits_wanted > free_bits) { |
| 636 | /* uhoh, window change time. */ |
| 637 | status = |
| 638 | ocfs2_local_alloc_slide_window(osb, local_alloc_inode); |
| 639 | if (status < 0) { |
| 640 | if (status != -ENOSPC) |
| 641 | mlog_errno(status); |
| 642 | goto bail; |
| 643 | } |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 644 | |
| 645 | /* |
| 646 | * Under certain conditions, the window slide code |
| 647 | * might have reduced the number of bits available or |
| 648 | * disabled the the local alloc entirely. Re-check |
| 649 | * here and return -ENOSPC if necessary. |
| 650 | */ |
| 651 | status = -ENOSPC; |
| 652 | if (!ocfs2_la_state_enabled(osb)) |
| 653 | goto bail; |
| 654 | |
| 655 | free_bits = le32_to_cpu(alloc->id1.bitmap1.i_total) - |
| 656 | le32_to_cpu(alloc->id1.bitmap1.i_used); |
| 657 | if (bits_wanted > free_bits) |
| 658 | goto bail; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 659 | } |
| 660 | |
Mark Fasheh | 8fccfc8 | 2007-05-09 17:34:26 -0700 | [diff] [blame] | 661 | ac->ac_inode = local_alloc_inode; |
Tao Ma | a4a4891 | 2008-03-03 17:12:30 +0800 | [diff] [blame] | 662 | /* We should never use localalloc from another slot */ |
| 663 | ac->ac_alloc_slot = osb->slot_num; |
Mark Fasheh | 8fccfc8 | 2007-05-09 17:34:26 -0700 | [diff] [blame] | 664 | ac->ac_which = OCFS2_AC_USE_LOCAL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 665 | get_bh(osb->local_alloc_bh); |
| 666 | ac->ac_bh = osb->local_alloc_bh; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 667 | status = 0; |
| 668 | bail: |
Sunil Mushran | bda0233 | 2007-09-21 11:41:43 -0700 | [diff] [blame] | 669 | if (status < 0 && local_alloc_inode) { |
| 670 | mutex_unlock(&local_alloc_inode->i_mutex); |
Mark Fasheh | 8fccfc8 | 2007-05-09 17:34:26 -0700 | [diff] [blame] | 671 | iput(local_alloc_inode); |
Sunil Mushran | bda0233 | 2007-09-21 11:41:43 -0700 | [diff] [blame] | 672 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 673 | |
Sunil Mushran | 2fbe8d1 | 2007-12-20 14:58:11 -0800 | [diff] [blame] | 674 | mlog(0, "bits=%d, slot=%d, ret=%d\n", bits_wanted, osb->slot_num, |
| 675 | status); |
| 676 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 677 | mlog_exit(status); |
| 678 | return status; |
| 679 | } |
| 680 | |
| 681 | int ocfs2_claim_local_alloc_bits(struct ocfs2_super *osb, |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 682 | handle_t *handle, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 683 | struct ocfs2_alloc_context *ac, |
Mark Fasheh | 415cb80 | 2007-09-16 20:10:16 -0700 | [diff] [blame] | 684 | u32 bits_wanted, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 685 | u32 *bit_off, |
| 686 | u32 *num_bits) |
| 687 | { |
| 688 | int status, start; |
| 689 | struct inode *local_alloc_inode; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 690 | void *bitmap; |
| 691 | struct ocfs2_dinode *alloc; |
| 692 | struct ocfs2_local_alloc *la; |
| 693 | |
| 694 | mlog_entry_void(); |
| 695 | BUG_ON(ac->ac_which != OCFS2_AC_USE_LOCAL); |
| 696 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 697 | local_alloc_inode = ac->ac_inode; |
| 698 | alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data; |
| 699 | la = OCFS2_LOCAL_ALLOC(alloc); |
| 700 | |
| 701 | start = ocfs2_local_alloc_find_clear_bits(osb, alloc, bits_wanted); |
| 702 | if (start == -1) { |
| 703 | /* TODO: Shouldn't we just BUG here? */ |
| 704 | status = -ENOSPC; |
| 705 | mlog_errno(status); |
| 706 | goto bail; |
| 707 | } |
| 708 | |
| 709 | bitmap = la->la_bitmap; |
| 710 | *bit_off = le32_to_cpu(la->la_bm_off) + start; |
| 711 | /* local alloc is always contiguous by nature -- we never |
| 712 | * delete bits from it! */ |
| 713 | *num_bits = bits_wanted; |
| 714 | |
| 715 | status = ocfs2_journal_access(handle, local_alloc_inode, |
| 716 | osb->local_alloc_bh, |
| 717 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 718 | if (status < 0) { |
| 719 | mlog_errno(status); |
| 720 | goto bail; |
| 721 | } |
| 722 | |
| 723 | while(bits_wanted--) |
| 724 | ocfs2_set_bit(start++, bitmap); |
| 725 | |
Marcin Slusarz | 0dd3256 | 2008-02-13 00:06:18 +0100 | [diff] [blame] | 726 | le32_add_cpu(&alloc->id1.bitmap1.i_used, *num_bits); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 727 | |
| 728 | status = ocfs2_journal_dirty(handle, osb->local_alloc_bh); |
| 729 | if (status < 0) { |
| 730 | mlog_errno(status); |
| 731 | goto bail; |
| 732 | } |
| 733 | |
| 734 | status = 0; |
| 735 | bail: |
| 736 | mlog_exit(status); |
| 737 | return status; |
| 738 | } |
| 739 | |
| 740 | static u32 ocfs2_local_alloc_count_bits(struct ocfs2_dinode *alloc) |
| 741 | { |
| 742 | int i; |
| 743 | u8 *buffer; |
| 744 | u32 count = 0; |
| 745 | struct ocfs2_local_alloc *la = OCFS2_LOCAL_ALLOC(alloc); |
| 746 | |
| 747 | mlog_entry_void(); |
| 748 | |
| 749 | buffer = la->la_bitmap; |
| 750 | for (i = 0; i < le16_to_cpu(la->la_size); i++) |
| 751 | count += hweight8(buffer[i]); |
| 752 | |
| 753 | mlog_exit(count); |
| 754 | return count; |
| 755 | } |
| 756 | |
| 757 | static int ocfs2_local_alloc_find_clear_bits(struct ocfs2_super *osb, |
| 758 | struct ocfs2_dinode *alloc, |
| 759 | u32 numbits) |
| 760 | { |
| 761 | int numfound, bitoff, left, startoff, lastzero; |
| 762 | void *bitmap = NULL; |
| 763 | |
| 764 | mlog_entry("(numbits wanted = %u)\n", numbits); |
| 765 | |
| 766 | if (!alloc->id1.bitmap1.i_total) { |
| 767 | mlog(0, "No bits in my window!\n"); |
| 768 | bitoff = -1; |
| 769 | goto bail; |
| 770 | } |
| 771 | |
| 772 | bitmap = OCFS2_LOCAL_ALLOC(alloc)->la_bitmap; |
| 773 | |
| 774 | numfound = bitoff = startoff = 0; |
| 775 | lastzero = -1; |
| 776 | left = le32_to_cpu(alloc->id1.bitmap1.i_total); |
| 777 | while ((bitoff = ocfs2_find_next_zero_bit(bitmap, left, startoff)) != -1) { |
| 778 | if (bitoff == left) { |
| 779 | /* mlog(0, "bitoff (%d) == left", bitoff); */ |
| 780 | break; |
| 781 | } |
| 782 | /* mlog(0, "Found a zero: bitoff = %d, startoff = %d, " |
| 783 | "numfound = %d\n", bitoff, startoff, numfound);*/ |
| 784 | |
| 785 | /* Ok, we found a zero bit... is it contig. or do we |
| 786 | * start over?*/ |
| 787 | if (bitoff == startoff) { |
| 788 | /* we found a zero */ |
| 789 | numfound++; |
| 790 | startoff++; |
| 791 | } else { |
| 792 | /* got a zero after some ones */ |
| 793 | numfound = 1; |
| 794 | startoff = bitoff+1; |
| 795 | } |
| 796 | /* we got everything we needed */ |
| 797 | if (numfound == numbits) { |
| 798 | /* mlog(0, "Found it all!\n"); */ |
| 799 | break; |
| 800 | } |
| 801 | } |
| 802 | |
| 803 | mlog(0, "Exiting loop, bitoff = %d, numfound = %d\n", bitoff, |
| 804 | numfound); |
| 805 | |
| 806 | if (numfound == numbits) |
| 807 | bitoff = startoff - numfound; |
| 808 | else |
| 809 | bitoff = -1; |
| 810 | |
| 811 | bail: |
| 812 | mlog_exit(bitoff); |
| 813 | return bitoff; |
| 814 | } |
| 815 | |
| 816 | static void ocfs2_clear_local_alloc(struct ocfs2_dinode *alloc) |
| 817 | { |
| 818 | struct ocfs2_local_alloc *la = OCFS2_LOCAL_ALLOC(alloc); |
| 819 | int i; |
| 820 | mlog_entry_void(); |
| 821 | |
| 822 | alloc->id1.bitmap1.i_total = 0; |
| 823 | alloc->id1.bitmap1.i_used = 0; |
| 824 | la->la_bm_off = 0; |
| 825 | for(i = 0; i < le16_to_cpu(la->la_size); i++) |
| 826 | la->la_bitmap[i] = 0; |
| 827 | |
| 828 | mlog_exit_void(); |
| 829 | } |
| 830 | |
| 831 | #if 0 |
| 832 | /* turn this on and uncomment below to aid debugging window shifts. */ |
| 833 | static void ocfs2_verify_zero_bits(unsigned long *bitmap, |
| 834 | unsigned int start, |
| 835 | unsigned int count) |
| 836 | { |
| 837 | unsigned int tmp = count; |
| 838 | while(tmp--) { |
| 839 | if (ocfs2_test_bit(start + tmp, bitmap)) { |
| 840 | printk("ocfs2_verify_zero_bits: start = %u, count = " |
| 841 | "%u\n", start, count); |
| 842 | printk("ocfs2_verify_zero_bits: bit %u is set!", |
| 843 | start + tmp); |
| 844 | BUG(); |
| 845 | } |
| 846 | } |
| 847 | } |
| 848 | #endif |
| 849 | |
| 850 | /* |
| 851 | * sync the local alloc to main bitmap. |
| 852 | * |
| 853 | * assumes you've already locked the main bitmap -- the bitmap inode |
| 854 | * passed is used for caching. |
| 855 | */ |
| 856 | static int ocfs2_sync_local_to_main(struct ocfs2_super *osb, |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 857 | handle_t *handle, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 858 | struct ocfs2_dinode *alloc, |
| 859 | struct inode *main_bm_inode, |
| 860 | struct buffer_head *main_bm_bh) |
| 861 | { |
| 862 | int status = 0; |
| 863 | int bit_off, left, count, start; |
| 864 | u64 la_start_blk; |
| 865 | u64 blkno; |
| 866 | void *bitmap; |
| 867 | struct ocfs2_local_alloc *la = OCFS2_LOCAL_ALLOC(alloc); |
| 868 | |
Jan Kara | 5a58c3e | 2007-11-13 19:59:33 +0100 | [diff] [blame] | 869 | mlog_entry("total = %u, used = %u\n", |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 870 | le32_to_cpu(alloc->id1.bitmap1.i_total), |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 871 | le32_to_cpu(alloc->id1.bitmap1.i_used)); |
| 872 | |
| 873 | if (!alloc->id1.bitmap1.i_total) { |
| 874 | mlog(0, "nothing to sync!\n"); |
| 875 | goto bail; |
| 876 | } |
| 877 | |
| 878 | if (le32_to_cpu(alloc->id1.bitmap1.i_used) == |
| 879 | le32_to_cpu(alloc->id1.bitmap1.i_total)) { |
| 880 | mlog(0, "all bits were taken!\n"); |
| 881 | goto bail; |
| 882 | } |
| 883 | |
| 884 | la_start_blk = ocfs2_clusters_to_blocks(osb->sb, |
| 885 | le32_to_cpu(la->la_bm_off)); |
| 886 | bitmap = la->la_bitmap; |
| 887 | start = count = bit_off = 0; |
| 888 | left = le32_to_cpu(alloc->id1.bitmap1.i_total); |
| 889 | |
| 890 | while ((bit_off = ocfs2_find_next_zero_bit(bitmap, left, start)) |
| 891 | != -1) { |
| 892 | if ((bit_off < left) && (bit_off == start)) { |
| 893 | count++; |
| 894 | start++; |
| 895 | continue; |
| 896 | } |
| 897 | if (count) { |
| 898 | blkno = la_start_blk + |
| 899 | ocfs2_clusters_to_blocks(osb->sb, |
| 900 | start - count); |
| 901 | |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 902 | mlog(0, "freeing %u bits starting at local alloc bit " |
| 903 | "%u (la_start_blk = %llu, blkno = %llu)\n", |
| 904 | count, start - count, |
| 905 | (unsigned long long)la_start_blk, |
| 906 | (unsigned long long)blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 907 | |
| 908 | status = ocfs2_free_clusters(handle, main_bm_inode, |
| 909 | main_bm_bh, blkno, count); |
| 910 | if (status < 0) { |
| 911 | mlog_errno(status); |
| 912 | goto bail; |
| 913 | } |
| 914 | } |
| 915 | if (bit_off >= left) |
| 916 | break; |
| 917 | count = 1; |
| 918 | start = bit_off + 1; |
| 919 | } |
| 920 | |
| 921 | bail: |
| 922 | mlog_exit(status); |
| 923 | return status; |
| 924 | } |
| 925 | |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 926 | enum ocfs2_la_event { |
| 927 | OCFS2_LA_EVENT_SLIDE, /* Normal window slide. */ |
| 928 | OCFS2_LA_EVENT_FRAGMENTED, /* The global bitmap has |
| 929 | * enough bits theoretically |
| 930 | * free, but a contiguous |
| 931 | * allocation could not be |
| 932 | * found. */ |
| 933 | OCFS2_LA_EVENT_ENOSPC, /* Global bitmap doesn't have |
| 934 | * enough bits free to satisfy |
| 935 | * our request. */ |
| 936 | }; |
| 937 | #define OCFS2_LA_ENABLE_INTERVAL (30 * HZ) |
| 938 | /* |
| 939 | * Given an event, calculate the size of our next local alloc window. |
| 940 | * |
| 941 | * This should always be called under i_mutex of the local alloc inode |
| 942 | * so that local alloc disabling doesn't race with processes trying to |
| 943 | * use the allocator. |
| 944 | * |
| 945 | * Returns the state which the local alloc was left in. This value can |
| 946 | * be ignored by some paths. |
| 947 | */ |
| 948 | static int ocfs2_recalc_la_window(struct ocfs2_super *osb, |
| 949 | enum ocfs2_la_event event) |
| 950 | { |
| 951 | unsigned int bits; |
| 952 | int state; |
| 953 | |
| 954 | spin_lock(&osb->osb_lock); |
| 955 | if (osb->local_alloc_state == OCFS2_LA_DISABLED) { |
| 956 | WARN_ON_ONCE(osb->local_alloc_state == OCFS2_LA_DISABLED); |
| 957 | goto out_unlock; |
| 958 | } |
| 959 | |
| 960 | /* |
| 961 | * ENOSPC and fragmentation are treated similarly for now. |
| 962 | */ |
| 963 | if (event == OCFS2_LA_EVENT_ENOSPC || |
| 964 | event == OCFS2_LA_EVENT_FRAGMENTED) { |
| 965 | /* |
| 966 | * We ran out of contiguous space in the primary |
| 967 | * bitmap. Drastically reduce the number of bits used |
| 968 | * by local alloc until we have to disable it. |
| 969 | */ |
| 970 | bits = osb->local_alloc_bits >> 1; |
| 971 | if (bits > ocfs2_megabytes_to_clusters(osb->sb, 1)) { |
| 972 | /* |
| 973 | * By setting state to THROTTLED, we'll keep |
| 974 | * the number of local alloc bits used down |
| 975 | * until an event occurs which would give us |
| 976 | * reason to assume the bitmap situation might |
| 977 | * have changed. |
| 978 | */ |
| 979 | osb->local_alloc_state = OCFS2_LA_THROTTLED; |
| 980 | osb->local_alloc_bits = bits; |
| 981 | } else { |
| 982 | osb->local_alloc_state = OCFS2_LA_DISABLED; |
| 983 | } |
| 984 | queue_delayed_work(ocfs2_wq, &osb->la_enable_wq, |
| 985 | OCFS2_LA_ENABLE_INTERVAL); |
| 986 | goto out_unlock; |
| 987 | } |
| 988 | |
| 989 | /* |
| 990 | * Don't increase the size of the local alloc window until we |
| 991 | * know we might be able to fulfill the request. Otherwise, we |
| 992 | * risk bouncing around the global bitmap during periods of |
| 993 | * low space. |
| 994 | */ |
| 995 | if (osb->local_alloc_state != OCFS2_LA_THROTTLED) |
| 996 | osb->local_alloc_bits = osb->local_alloc_default_bits; |
| 997 | |
| 998 | out_unlock: |
| 999 | state = osb->local_alloc_state; |
| 1000 | spin_unlock(&osb->osb_lock); |
| 1001 | |
| 1002 | return state; |
| 1003 | } |
| 1004 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1005 | static int ocfs2_local_alloc_reserve_for_window(struct ocfs2_super *osb, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1006 | struct ocfs2_alloc_context **ac, |
| 1007 | struct inode **bitmap_inode, |
| 1008 | struct buffer_head **bitmap_bh) |
| 1009 | { |
| 1010 | int status; |
| 1011 | |
Robert P. J. Day | cd86128 | 2006-12-13 00:34:52 -0800 | [diff] [blame] | 1012 | *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1013 | if (!(*ac)) { |
| 1014 | status = -ENOMEM; |
| 1015 | mlog_errno(status); |
| 1016 | goto bail; |
| 1017 | } |
| 1018 | |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 1019 | retry_enospc: |
Mark Fasheh | ebcee4b | 2008-07-28 14:55:20 -0700 | [diff] [blame] | 1020 | (*ac)->ac_bits_wanted = osb->local_alloc_bits; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1021 | |
| 1022 | status = ocfs2_reserve_cluster_bitmap_bits(osb, *ac); |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 1023 | if (status == -ENOSPC) { |
| 1024 | if (ocfs2_recalc_la_window(osb, OCFS2_LA_EVENT_ENOSPC) == |
| 1025 | OCFS2_LA_DISABLED) |
| 1026 | goto bail; |
| 1027 | |
| 1028 | ocfs2_free_ac_resource(*ac); |
| 1029 | memset(*ac, 0, sizeof(struct ocfs2_alloc_context)); |
| 1030 | goto retry_enospc; |
| 1031 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1032 | if (status < 0) { |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 1033 | mlog_errno(status); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1034 | goto bail; |
| 1035 | } |
| 1036 | |
| 1037 | *bitmap_inode = (*ac)->ac_inode; |
| 1038 | igrab(*bitmap_inode); |
| 1039 | *bitmap_bh = (*ac)->ac_bh; |
| 1040 | get_bh(*bitmap_bh); |
| 1041 | status = 0; |
| 1042 | bail: |
| 1043 | if ((status < 0) && *ac) { |
| 1044 | ocfs2_free_alloc_context(*ac); |
| 1045 | *ac = NULL; |
| 1046 | } |
| 1047 | |
| 1048 | mlog_exit(status); |
| 1049 | return status; |
| 1050 | } |
| 1051 | |
| 1052 | /* |
| 1053 | * pass it the bitmap lock in lock_bh if you have it. |
| 1054 | */ |
| 1055 | static int ocfs2_local_alloc_new_window(struct ocfs2_super *osb, |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 1056 | handle_t *handle, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1057 | struct ocfs2_alloc_context *ac) |
| 1058 | { |
| 1059 | int status = 0; |
| 1060 | u32 cluster_off, cluster_count; |
| 1061 | struct ocfs2_dinode *alloc = NULL; |
| 1062 | struct ocfs2_local_alloc *la; |
| 1063 | |
| 1064 | mlog_entry_void(); |
| 1065 | |
| 1066 | alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data; |
| 1067 | la = OCFS2_LOCAL_ALLOC(alloc); |
| 1068 | |
| 1069 | if (alloc->id1.bitmap1.i_total) |
| 1070 | mlog(0, "asking me to alloc a new window over a non-empty " |
| 1071 | "one\n"); |
| 1072 | |
| 1073 | mlog(0, "Allocating %u clusters for a new window.\n", |
Mark Fasheh | ebcee4b | 2008-07-28 14:55:20 -0700 | [diff] [blame] | 1074 | osb->local_alloc_bits); |
Mark Fasheh | 883d4ca | 2006-06-05 16:41:00 -0400 | [diff] [blame] | 1075 | |
| 1076 | /* Instruct the allocation code to try the most recently used |
| 1077 | * cluster group. We'll re-record the group used this pass |
| 1078 | * below. */ |
| 1079 | ac->ac_last_group = osb->la_last_gd; |
| 1080 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1081 | /* we used the generic suballoc reserve function, but we set |
| 1082 | * everything up nicely, so there's no reason why we can't use |
| 1083 | * the more specific cluster api to claim bits. */ |
Mark Fasheh | ebcee4b | 2008-07-28 14:55:20 -0700 | [diff] [blame] | 1084 | status = ocfs2_claim_clusters(osb, handle, ac, osb->local_alloc_bits, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1085 | &cluster_off, &cluster_count); |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 1086 | if (status == -ENOSPC) { |
| 1087 | retry_enospc: |
| 1088 | /* |
| 1089 | * Note: We could also try syncing the journal here to |
| 1090 | * allow use of any free bits which the current |
| 1091 | * transaction can't give us access to. --Mark |
| 1092 | */ |
| 1093 | if (ocfs2_recalc_la_window(osb, OCFS2_LA_EVENT_FRAGMENTED) == |
| 1094 | OCFS2_LA_DISABLED) |
| 1095 | goto bail; |
| 1096 | |
| 1097 | status = ocfs2_claim_clusters(osb, handle, ac, |
| 1098 | osb->local_alloc_bits, |
| 1099 | &cluster_off, |
| 1100 | &cluster_count); |
| 1101 | if (status == -ENOSPC) |
| 1102 | goto retry_enospc; |
| 1103 | /* |
| 1104 | * We only shrunk the *minimum* number of in our |
| 1105 | * request - it's entirely possible that the allocator |
| 1106 | * might give us more than we asked for. |
| 1107 | */ |
| 1108 | if (status == 0) { |
| 1109 | spin_lock(&osb->osb_lock); |
| 1110 | osb->local_alloc_bits = cluster_count; |
| 1111 | spin_unlock(&osb->osb_lock); |
| 1112 | } |
| 1113 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1114 | if (status < 0) { |
| 1115 | if (status != -ENOSPC) |
| 1116 | mlog_errno(status); |
| 1117 | goto bail; |
| 1118 | } |
| 1119 | |
Mark Fasheh | 883d4ca | 2006-06-05 16:41:00 -0400 | [diff] [blame] | 1120 | osb->la_last_gd = ac->ac_last_group; |
| 1121 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1122 | la->la_bm_off = cpu_to_le32(cluster_off); |
| 1123 | alloc->id1.bitmap1.i_total = cpu_to_le32(cluster_count); |
| 1124 | /* just in case... In the future when we find space ourselves, |
| 1125 | * we don't have to get all contiguous -- but we'll have to |
| 1126 | * set all previously used bits in bitmap and update |
| 1127 | * la_bits_set before setting the bits in the main bitmap. */ |
| 1128 | alloc->id1.bitmap1.i_used = 0; |
| 1129 | memset(OCFS2_LOCAL_ALLOC(alloc)->la_bitmap, 0, |
| 1130 | le16_to_cpu(la->la_size)); |
| 1131 | |
| 1132 | mlog(0, "New window allocated:\n"); |
| 1133 | mlog(0, "window la_bm_off = %u\n", |
| 1134 | OCFS2_LOCAL_ALLOC(alloc)->la_bm_off); |
| 1135 | mlog(0, "window bits = %u\n", le32_to_cpu(alloc->id1.bitmap1.i_total)); |
| 1136 | |
| 1137 | bail: |
| 1138 | mlog_exit(status); |
| 1139 | return status; |
| 1140 | } |
| 1141 | |
| 1142 | /* Note that we do *NOT* lock the local alloc inode here as |
| 1143 | * it's been locked already for us. */ |
| 1144 | static int ocfs2_local_alloc_slide_window(struct ocfs2_super *osb, |
| 1145 | struct inode *local_alloc_inode) |
| 1146 | { |
| 1147 | int status = 0; |
| 1148 | struct buffer_head *main_bm_bh = NULL; |
| 1149 | struct inode *main_bm_inode = NULL; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 1150 | handle_t *handle = NULL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1151 | struct ocfs2_dinode *alloc; |
| 1152 | struct ocfs2_dinode *alloc_copy = NULL; |
| 1153 | struct ocfs2_alloc_context *ac = NULL; |
| 1154 | |
| 1155 | mlog_entry_void(); |
| 1156 | |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 1157 | ocfs2_recalc_la_window(osb, OCFS2_LA_EVENT_SLIDE); |
| 1158 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1159 | /* This will lock the main bitmap for us. */ |
| 1160 | status = ocfs2_local_alloc_reserve_for_window(osb, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1161 | &ac, |
| 1162 | &main_bm_inode, |
| 1163 | &main_bm_bh); |
| 1164 | if (status < 0) { |
| 1165 | if (status != -ENOSPC) |
| 1166 | mlog_errno(status); |
| 1167 | goto bail; |
| 1168 | } |
| 1169 | |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 1170 | handle = ocfs2_start_trans(osb, OCFS2_WINDOW_MOVE_CREDITS); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1171 | if (IS_ERR(handle)) { |
| 1172 | status = PTR_ERR(handle); |
| 1173 | handle = NULL; |
| 1174 | mlog_errno(status); |
| 1175 | goto bail; |
| 1176 | } |
| 1177 | |
| 1178 | alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data; |
| 1179 | |
| 1180 | /* We want to clear the local alloc before doing anything |
| 1181 | * else, so that if we error later during this operation, |
| 1182 | * local alloc shutdown won't try to double free main bitmap |
| 1183 | * bits. Make a copy so the sync function knows which bits to |
| 1184 | * free. */ |
Sunil Mushran | 4ba1c5b | 2008-04-18 15:03:59 -0700 | [diff] [blame] | 1185 | alloc_copy = kmalloc(osb->local_alloc_bh->b_size, GFP_NOFS); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1186 | if (!alloc_copy) { |
| 1187 | status = -ENOMEM; |
| 1188 | mlog_errno(status); |
| 1189 | goto bail; |
| 1190 | } |
| 1191 | memcpy(alloc_copy, alloc, osb->local_alloc_bh->b_size); |
| 1192 | |
| 1193 | status = ocfs2_journal_access(handle, local_alloc_inode, |
| 1194 | osb->local_alloc_bh, |
| 1195 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 1196 | if (status < 0) { |
| 1197 | mlog_errno(status); |
| 1198 | goto bail; |
| 1199 | } |
| 1200 | |
| 1201 | ocfs2_clear_local_alloc(alloc); |
| 1202 | |
| 1203 | status = ocfs2_journal_dirty(handle, osb->local_alloc_bh); |
| 1204 | if (status < 0) { |
| 1205 | mlog_errno(status); |
| 1206 | goto bail; |
| 1207 | } |
| 1208 | |
| 1209 | status = ocfs2_sync_local_to_main(osb, handle, alloc_copy, |
| 1210 | main_bm_inode, main_bm_bh); |
| 1211 | if (status < 0) { |
| 1212 | mlog_errno(status); |
| 1213 | goto bail; |
| 1214 | } |
| 1215 | |
| 1216 | status = ocfs2_local_alloc_new_window(osb, handle, ac); |
| 1217 | if (status < 0) { |
| 1218 | if (status != -ENOSPC) |
| 1219 | mlog_errno(status); |
| 1220 | goto bail; |
| 1221 | } |
| 1222 | |
| 1223 | atomic_inc(&osb->alloc_stats.moves); |
| 1224 | |
| 1225 | status = 0; |
| 1226 | bail: |
| 1227 | if (handle) |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 1228 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1229 | |
| 1230 | if (main_bm_bh) |
| 1231 | brelse(main_bm_bh); |
| 1232 | |
| 1233 | if (main_bm_inode) |
| 1234 | iput(main_bm_inode); |
| 1235 | |
| 1236 | if (alloc_copy) |
| 1237 | kfree(alloc_copy); |
| 1238 | |
| 1239 | if (ac) |
| 1240 | ocfs2_free_alloc_context(ac); |
| 1241 | |
| 1242 | mlog_exit(status); |
| 1243 | return status; |
| 1244 | } |
| 1245 | |