Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1 | /* |
| 2 | * segment.c - NILFS segment constructor. |
| 3 | * |
| 4 | * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | * |
| 20 | * Written by Ryusuke Konishi <ryusuke@osrg.net> |
| 21 | * |
| 22 | */ |
| 23 | |
| 24 | #include <linux/pagemap.h> |
| 25 | #include <linux/buffer_head.h> |
| 26 | #include <linux/writeback.h> |
| 27 | #include <linux/bio.h> |
| 28 | #include <linux/completion.h> |
| 29 | #include <linux/blkdev.h> |
| 30 | #include <linux/backing-dev.h> |
| 31 | #include <linux/freezer.h> |
| 32 | #include <linux/kthread.h> |
| 33 | #include <linux/crc32.h> |
| 34 | #include <linux/pagevec.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 35 | #include <linux/slab.h> |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 36 | #include "nilfs.h" |
| 37 | #include "btnode.h" |
| 38 | #include "page.h" |
| 39 | #include "segment.h" |
| 40 | #include "sufile.h" |
| 41 | #include "cpfile.h" |
| 42 | #include "ifile.h" |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 43 | #include "segbuf.h" |
| 44 | |
| 45 | |
| 46 | /* |
| 47 | * Segment constructor |
| 48 | */ |
| 49 | #define SC_N_INODEVEC 16 /* Size of locally allocated inode vector */ |
| 50 | |
| 51 | #define SC_MAX_SEGDELTA 64 /* Upper limit of the number of segments |
| 52 | appended in collection retry loop */ |
| 53 | |
| 54 | /* Construction mode */ |
| 55 | enum { |
| 56 | SC_LSEG_SR = 1, /* Make a logical segment having a super root */ |
| 57 | SC_LSEG_DSYNC, /* Flush data blocks of a given file and make |
| 58 | a logical segment without a super root */ |
| 59 | SC_FLUSH_FILE, /* Flush data files, leads to segment writes without |
| 60 | creating a checkpoint */ |
| 61 | SC_FLUSH_DAT, /* Flush DAT file. This also creates segments without |
| 62 | a checkpoint */ |
| 63 | }; |
| 64 | |
| 65 | /* Stage numbers of dirty block collection */ |
| 66 | enum { |
| 67 | NILFS_ST_INIT = 0, |
| 68 | NILFS_ST_GC, /* Collecting dirty blocks for GC */ |
| 69 | NILFS_ST_FILE, |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 70 | NILFS_ST_IFILE, |
| 71 | NILFS_ST_CPFILE, |
| 72 | NILFS_ST_SUFILE, |
| 73 | NILFS_ST_DAT, |
| 74 | NILFS_ST_SR, /* Super root */ |
| 75 | NILFS_ST_DSYNC, /* Data sync blocks */ |
| 76 | NILFS_ST_DONE, |
| 77 | }; |
| 78 | |
| 79 | /* State flags of collection */ |
| 80 | #define NILFS_CF_NODE 0x0001 /* Collecting node blocks */ |
| 81 | #define NILFS_CF_IFILE_STARTED 0x0002 /* IFILE stage has started */ |
Ryusuke Konishi | 071cb4b | 2009-05-16 23:44:55 +0900 | [diff] [blame] | 82 | #define NILFS_CF_SUFREED 0x0004 /* segment usages has been freed */ |
| 83 | #define NILFS_CF_HISTORY_MASK (NILFS_CF_IFILE_STARTED | NILFS_CF_SUFREED) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 84 | |
| 85 | /* Operations depending on the construction mode and file type */ |
| 86 | struct nilfs_sc_operations { |
| 87 | int (*collect_data)(struct nilfs_sc_info *, struct buffer_head *, |
| 88 | struct inode *); |
| 89 | int (*collect_node)(struct nilfs_sc_info *, struct buffer_head *, |
| 90 | struct inode *); |
| 91 | int (*collect_bmap)(struct nilfs_sc_info *, struct buffer_head *, |
| 92 | struct inode *); |
| 93 | void (*write_data_binfo)(struct nilfs_sc_info *, |
| 94 | struct nilfs_segsum_pointer *, |
| 95 | union nilfs_binfo *); |
| 96 | void (*write_node_binfo)(struct nilfs_sc_info *, |
| 97 | struct nilfs_segsum_pointer *, |
| 98 | union nilfs_binfo *); |
| 99 | }; |
| 100 | |
| 101 | /* |
| 102 | * Other definitions |
| 103 | */ |
| 104 | static void nilfs_segctor_start_timer(struct nilfs_sc_info *); |
| 105 | static void nilfs_segctor_do_flush(struct nilfs_sc_info *, int); |
| 106 | static void nilfs_segctor_do_immediate_flush(struct nilfs_sc_info *); |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 107 | static void nilfs_dispose_list(struct the_nilfs *, struct list_head *, int); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 108 | |
| 109 | #define nilfs_cnt32_gt(a, b) \ |
| 110 | (typecheck(__u32, a) && typecheck(__u32, b) && \ |
| 111 | ((__s32)(b) - (__s32)(a) < 0)) |
| 112 | #define nilfs_cnt32_ge(a, b) \ |
| 113 | (typecheck(__u32, a) && typecheck(__u32, b) && \ |
| 114 | ((__s32)(a) - (__s32)(b) >= 0)) |
| 115 | #define nilfs_cnt32_lt(a, b) nilfs_cnt32_gt(b, a) |
| 116 | #define nilfs_cnt32_le(a, b) nilfs_cnt32_ge(b, a) |
| 117 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 118 | static int nilfs_prepare_segment_lock(struct nilfs_transaction_info *ti) |
| 119 | { |
| 120 | struct nilfs_transaction_info *cur_ti = current->journal_info; |
| 121 | void *save = NULL; |
| 122 | |
| 123 | if (cur_ti) { |
| 124 | if (cur_ti->ti_magic == NILFS_TI_MAGIC) |
| 125 | return ++cur_ti->ti_count; |
| 126 | else { |
| 127 | /* |
| 128 | * If journal_info field is occupied by other FS, |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 129 | * it is saved and will be restored on |
| 130 | * nilfs_transaction_commit(). |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 131 | */ |
| 132 | printk(KERN_WARNING |
| 133 | "NILFS warning: journal info from a different " |
| 134 | "FS\n"); |
| 135 | save = current->journal_info; |
| 136 | } |
| 137 | } |
| 138 | if (!ti) { |
| 139 | ti = kmem_cache_alloc(nilfs_transaction_cachep, GFP_NOFS); |
| 140 | if (!ti) |
| 141 | return -ENOMEM; |
| 142 | ti->ti_flags = NILFS_TI_DYNAMIC_ALLOC; |
| 143 | } else { |
| 144 | ti->ti_flags = 0; |
| 145 | } |
| 146 | ti->ti_count = 0; |
| 147 | ti->ti_save = save; |
| 148 | ti->ti_magic = NILFS_TI_MAGIC; |
| 149 | current->journal_info = ti; |
| 150 | return 0; |
| 151 | } |
| 152 | |
| 153 | /** |
| 154 | * nilfs_transaction_begin - start indivisible file operations. |
| 155 | * @sb: super block |
| 156 | * @ti: nilfs_transaction_info |
| 157 | * @vacancy_check: flags for vacancy rate checks |
| 158 | * |
| 159 | * nilfs_transaction_begin() acquires a reader/writer semaphore, called |
| 160 | * the segment semaphore, to make a segment construction and write tasks |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 161 | * exclusive. The function is used with nilfs_transaction_commit() in pairs. |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 162 | * The region enclosed by these two functions can be nested. To avoid a |
| 163 | * deadlock, the semaphore is only acquired or released in the outermost call. |
| 164 | * |
| 165 | * This function allocates a nilfs_transaction_info struct to keep context |
| 166 | * information on it. It is initialized and hooked onto the current task in |
| 167 | * the outermost call. If a pre-allocated struct is given to @ti, it is used |
Ryusuke Konishi | 7a65004 | 2010-03-14 03:32:40 +0900 | [diff] [blame] | 168 | * instead; otherwise a new struct is assigned from a slab. |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 169 | * |
| 170 | * When @vacancy_check flag is set, this function will check the amount of |
| 171 | * free space, and will wait for the GC to reclaim disk space if low capacity. |
| 172 | * |
| 173 | * Return Value: On success, 0 is returned. On error, one of the following |
| 174 | * negative error code is returned. |
| 175 | * |
| 176 | * %-ENOMEM - Insufficient memory available. |
| 177 | * |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 178 | * %-ENOSPC - No space left on device |
| 179 | */ |
| 180 | int nilfs_transaction_begin(struct super_block *sb, |
| 181 | struct nilfs_transaction_info *ti, |
| 182 | int vacancy_check) |
| 183 | { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 184 | struct the_nilfs *nilfs; |
| 185 | int ret = nilfs_prepare_segment_lock(ti); |
| 186 | |
| 187 | if (unlikely(ret < 0)) |
| 188 | return ret; |
| 189 | if (ret > 0) |
| 190 | return 0; |
| 191 | |
Ryusuke Konishi | 5beb6e0 | 2010-09-20 18:19:06 +0900 | [diff] [blame] | 192 | vfs_check_frozen(sb, SB_FREEZE_WRITE); |
| 193 | |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 194 | nilfs = sb->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 195 | down_read(&nilfs->ns_segctor_sem); |
| 196 | if (vacancy_check && nilfs_near_disk_full(nilfs)) { |
| 197 | up_read(&nilfs->ns_segctor_sem); |
| 198 | ret = -ENOSPC; |
| 199 | goto failed; |
| 200 | } |
| 201 | return 0; |
| 202 | |
| 203 | failed: |
| 204 | ti = current->journal_info; |
| 205 | current->journal_info = ti->ti_save; |
| 206 | if (ti->ti_flags & NILFS_TI_DYNAMIC_ALLOC) |
| 207 | kmem_cache_free(nilfs_transaction_cachep, ti); |
| 208 | return ret; |
| 209 | } |
| 210 | |
| 211 | /** |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 212 | * nilfs_transaction_commit - commit indivisible file operations. |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 213 | * @sb: super block |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 214 | * |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 215 | * nilfs_transaction_commit() releases the read semaphore which is |
| 216 | * acquired by nilfs_transaction_begin(). This is only performed |
| 217 | * in outermost call of this function. If a commit flag is set, |
| 218 | * nilfs_transaction_commit() sets a timer to start the segment |
| 219 | * constructor. If a sync flag is set, it starts construction |
| 220 | * directly. |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 221 | */ |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 222 | int nilfs_transaction_commit(struct super_block *sb) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 223 | { |
| 224 | struct nilfs_transaction_info *ti = current->journal_info; |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 225 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 226 | int err = 0; |
| 227 | |
| 228 | BUG_ON(ti == NULL || ti->ti_magic != NILFS_TI_MAGIC); |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 229 | ti->ti_flags |= NILFS_TI_COMMIT; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 230 | if (ti->ti_count > 0) { |
| 231 | ti->ti_count--; |
| 232 | return 0; |
| 233 | } |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 234 | if (nilfs->ns_writer) { |
| 235 | struct nilfs_sc_info *sci = nilfs->ns_writer; |
| 236 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 237 | if (ti->ti_flags & NILFS_TI_COMMIT) |
| 238 | nilfs_segctor_start_timer(sci); |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 239 | if (atomic_read(&nilfs->ns_ndirtyblks) > sci->sc_watermark) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 240 | nilfs_segctor_do_flush(sci, 0); |
| 241 | } |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 242 | up_read(&nilfs->ns_segctor_sem); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 243 | current->journal_info = ti->ti_save; |
| 244 | |
| 245 | if (ti->ti_flags & NILFS_TI_SYNC) |
| 246 | err = nilfs_construct_segment(sb); |
| 247 | if (ti->ti_flags & NILFS_TI_DYNAMIC_ALLOC) |
| 248 | kmem_cache_free(nilfs_transaction_cachep, ti); |
| 249 | return err; |
| 250 | } |
| 251 | |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 252 | void nilfs_transaction_abort(struct super_block *sb) |
| 253 | { |
| 254 | struct nilfs_transaction_info *ti = current->journal_info; |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 255 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 256 | |
| 257 | BUG_ON(ti == NULL || ti->ti_magic != NILFS_TI_MAGIC); |
| 258 | if (ti->ti_count > 0) { |
| 259 | ti->ti_count--; |
| 260 | return; |
| 261 | } |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 262 | up_read(&nilfs->ns_segctor_sem); |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 263 | |
| 264 | current->journal_info = ti->ti_save; |
| 265 | if (ti->ti_flags & NILFS_TI_DYNAMIC_ALLOC) |
| 266 | kmem_cache_free(nilfs_transaction_cachep, ti); |
| 267 | } |
| 268 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 269 | void nilfs_relax_pressure_in_lock(struct super_block *sb) |
| 270 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 271 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 272 | struct nilfs_sc_info *sci = nilfs->ns_writer; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 273 | |
| 274 | if (!sci || !sci->sc_flush_request) |
| 275 | return; |
| 276 | |
| 277 | set_bit(NILFS_SC_PRIOR_FLUSH, &sci->sc_flags); |
| 278 | up_read(&nilfs->ns_segctor_sem); |
| 279 | |
| 280 | down_write(&nilfs->ns_segctor_sem); |
| 281 | if (sci->sc_flush_request && |
| 282 | test_bit(NILFS_SC_PRIOR_FLUSH, &sci->sc_flags)) { |
| 283 | struct nilfs_transaction_info *ti = current->journal_info; |
| 284 | |
| 285 | ti->ti_flags |= NILFS_TI_WRITER; |
| 286 | nilfs_segctor_do_immediate_flush(sci); |
| 287 | ti->ti_flags &= ~NILFS_TI_WRITER; |
| 288 | } |
| 289 | downgrade_write(&nilfs->ns_segctor_sem); |
| 290 | } |
| 291 | |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 292 | static void nilfs_transaction_lock(struct super_block *sb, |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 293 | struct nilfs_transaction_info *ti, |
| 294 | int gcflag) |
| 295 | { |
| 296 | struct nilfs_transaction_info *cur_ti = current->journal_info; |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 297 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 298 | struct nilfs_sc_info *sci = nilfs->ns_writer; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 299 | |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 300 | WARN_ON(cur_ti); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 301 | ti->ti_flags = NILFS_TI_WRITER; |
| 302 | ti->ti_count = 0; |
| 303 | ti->ti_save = cur_ti; |
| 304 | ti->ti_magic = NILFS_TI_MAGIC; |
| 305 | INIT_LIST_HEAD(&ti->ti_garbage); |
| 306 | current->journal_info = ti; |
| 307 | |
| 308 | for (;;) { |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 309 | down_write(&nilfs->ns_segctor_sem); |
| 310 | if (!test_bit(NILFS_SC_PRIOR_FLUSH, &sci->sc_flags)) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 311 | break; |
| 312 | |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 313 | nilfs_segctor_do_immediate_flush(sci); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 314 | |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 315 | up_write(&nilfs->ns_segctor_sem); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 316 | yield(); |
| 317 | } |
| 318 | if (gcflag) |
| 319 | ti->ti_flags |= NILFS_TI_GC; |
| 320 | } |
| 321 | |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 322 | static void nilfs_transaction_unlock(struct super_block *sb) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 323 | { |
| 324 | struct nilfs_transaction_info *ti = current->journal_info; |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 325 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 326 | |
| 327 | BUG_ON(ti == NULL || ti->ti_magic != NILFS_TI_MAGIC); |
| 328 | BUG_ON(ti->ti_count > 0); |
| 329 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 330 | up_write(&nilfs->ns_segctor_sem); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 331 | current->journal_info = ti->ti_save; |
| 332 | if (!list_empty(&ti->ti_garbage)) |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 333 | nilfs_dispose_list(nilfs, &ti->ti_garbage, 0); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 334 | } |
| 335 | |
| 336 | static void *nilfs_segctor_map_segsum_entry(struct nilfs_sc_info *sci, |
| 337 | struct nilfs_segsum_pointer *ssp, |
| 338 | unsigned bytes) |
| 339 | { |
| 340 | struct nilfs_segment_buffer *segbuf = sci->sc_curseg; |
| 341 | unsigned blocksize = sci->sc_super->s_blocksize; |
| 342 | void *p; |
| 343 | |
| 344 | if (unlikely(ssp->offset + bytes > blocksize)) { |
| 345 | ssp->offset = 0; |
| 346 | BUG_ON(NILFS_SEGBUF_BH_IS_LAST(ssp->bh, |
| 347 | &segbuf->sb_segsum_buffers)); |
| 348 | ssp->bh = NILFS_SEGBUF_NEXT_BH(ssp->bh); |
| 349 | } |
| 350 | p = ssp->bh->b_data + ssp->offset; |
| 351 | ssp->offset += bytes; |
| 352 | return p; |
| 353 | } |
| 354 | |
| 355 | /** |
| 356 | * nilfs_segctor_reset_segment_buffer - reset the current segment buffer |
| 357 | * @sci: nilfs_sc_info |
| 358 | */ |
| 359 | static int nilfs_segctor_reset_segment_buffer(struct nilfs_sc_info *sci) |
| 360 | { |
| 361 | struct nilfs_segment_buffer *segbuf = sci->sc_curseg; |
| 362 | struct buffer_head *sumbh; |
| 363 | unsigned sumbytes; |
| 364 | unsigned flags = 0; |
| 365 | int err; |
| 366 | |
| 367 | if (nilfs_doing_gc()) |
| 368 | flags = NILFS_SS_GC; |
Ryusuke Konishi | 6c43f41 | 2010-08-20 20:10:38 +0900 | [diff] [blame] | 369 | err = nilfs_segbuf_reset(segbuf, flags, sci->sc_seg_ctime, sci->sc_cno); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 370 | if (unlikely(err)) |
| 371 | return err; |
| 372 | |
| 373 | sumbh = NILFS_SEGBUF_FIRST_BH(&segbuf->sb_segsum_buffers); |
| 374 | sumbytes = segbuf->sb_sum.sumbytes; |
| 375 | sci->sc_finfo_ptr.bh = sumbh; sci->sc_finfo_ptr.offset = sumbytes; |
| 376 | sci->sc_binfo_ptr.bh = sumbh; sci->sc_binfo_ptr.offset = sumbytes; |
| 377 | sci->sc_blk_cnt = sci->sc_datablk_cnt = 0; |
| 378 | return 0; |
| 379 | } |
| 380 | |
| 381 | static int nilfs_segctor_feed_segment(struct nilfs_sc_info *sci) |
| 382 | { |
| 383 | sci->sc_nblk_this_inc += sci->sc_curseg->sb_sum.nblocks; |
| 384 | if (NILFS_SEGBUF_IS_LAST(sci->sc_curseg, &sci->sc_segbufs)) |
| 385 | return -E2BIG; /* The current segment is filled up |
| 386 | (internal code) */ |
| 387 | sci->sc_curseg = NILFS_NEXT_SEGBUF(sci->sc_curseg); |
| 388 | return nilfs_segctor_reset_segment_buffer(sci); |
| 389 | } |
| 390 | |
| 391 | static int nilfs_segctor_add_super_root(struct nilfs_sc_info *sci) |
| 392 | { |
| 393 | struct nilfs_segment_buffer *segbuf = sci->sc_curseg; |
| 394 | int err; |
| 395 | |
| 396 | if (segbuf->sb_sum.nblocks >= segbuf->sb_rest_blocks) { |
| 397 | err = nilfs_segctor_feed_segment(sci); |
| 398 | if (err) |
| 399 | return err; |
| 400 | segbuf = sci->sc_curseg; |
| 401 | } |
Ryusuke Konishi | 1e2b68b | 2010-03-23 01:15:31 +0900 | [diff] [blame] | 402 | err = nilfs_segbuf_extend_payload(segbuf, &segbuf->sb_super_root); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 403 | if (likely(!err)) |
| 404 | segbuf->sb_sum.flags |= NILFS_SS_SR; |
| 405 | return err; |
| 406 | } |
| 407 | |
| 408 | /* |
| 409 | * Functions for making segment summary and payloads |
| 410 | */ |
| 411 | static int nilfs_segctor_segsum_block_required( |
| 412 | struct nilfs_sc_info *sci, const struct nilfs_segsum_pointer *ssp, |
| 413 | unsigned binfo_size) |
| 414 | { |
| 415 | unsigned blocksize = sci->sc_super->s_blocksize; |
| 416 | /* Size of finfo and binfo is enough small against blocksize */ |
| 417 | |
| 418 | return ssp->offset + binfo_size + |
| 419 | (!sci->sc_blk_cnt ? sizeof(struct nilfs_finfo) : 0) > |
| 420 | blocksize; |
| 421 | } |
| 422 | |
| 423 | static void nilfs_segctor_begin_finfo(struct nilfs_sc_info *sci, |
| 424 | struct inode *inode) |
| 425 | { |
| 426 | sci->sc_curseg->sb_sum.nfinfo++; |
| 427 | sci->sc_binfo_ptr = sci->sc_finfo_ptr; |
| 428 | nilfs_segctor_map_segsum_entry( |
| 429 | sci, &sci->sc_binfo_ptr, sizeof(struct nilfs_finfo)); |
Ryusuke Konishi | c96fa46 | 2009-04-06 19:01:57 -0700 | [diff] [blame] | 430 | |
Ryusuke Konishi | 72746ac | 2011-02-28 13:41:11 +0900 | [diff] [blame] | 431 | if (NILFS_I(inode)->i_root && |
| 432 | !test_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags)) |
Ryusuke Konishi | c96fa46 | 2009-04-06 19:01:57 -0700 | [diff] [blame] | 433 | set_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 434 | /* skip finfo */ |
| 435 | } |
| 436 | |
| 437 | static void nilfs_segctor_end_finfo(struct nilfs_sc_info *sci, |
| 438 | struct inode *inode) |
| 439 | { |
| 440 | struct nilfs_finfo *finfo; |
| 441 | struct nilfs_inode_info *ii; |
| 442 | struct nilfs_segment_buffer *segbuf; |
Ryusuke Konishi | 6c43f41 | 2010-08-20 20:10:38 +0900 | [diff] [blame] | 443 | __u64 cno; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 444 | |
| 445 | if (sci->sc_blk_cnt == 0) |
| 446 | return; |
| 447 | |
| 448 | ii = NILFS_I(inode); |
Ryusuke Konishi | 6c43f41 | 2010-08-20 20:10:38 +0900 | [diff] [blame] | 449 | |
| 450 | if (test_bit(NILFS_I_GCINODE, &ii->i_state)) |
| 451 | cno = ii->i_cno; |
| 452 | else if (NILFS_ROOT_METADATA_FILE(inode->i_ino)) |
| 453 | cno = 0; |
| 454 | else |
| 455 | cno = sci->sc_cno; |
| 456 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 457 | finfo = nilfs_segctor_map_segsum_entry(sci, &sci->sc_finfo_ptr, |
| 458 | sizeof(*finfo)); |
| 459 | finfo->fi_ino = cpu_to_le64(inode->i_ino); |
| 460 | finfo->fi_nblocks = cpu_to_le32(sci->sc_blk_cnt); |
| 461 | finfo->fi_ndatablk = cpu_to_le32(sci->sc_datablk_cnt); |
Ryusuke Konishi | 6c43f41 | 2010-08-20 20:10:38 +0900 | [diff] [blame] | 462 | finfo->fi_cno = cpu_to_le64(cno); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 463 | |
| 464 | segbuf = sci->sc_curseg; |
| 465 | segbuf->sb_sum.sumbytes = sci->sc_binfo_ptr.offset + |
| 466 | sci->sc_super->s_blocksize * (segbuf->sb_sum.nsumblk - 1); |
| 467 | sci->sc_finfo_ptr = sci->sc_binfo_ptr; |
| 468 | sci->sc_blk_cnt = sci->sc_datablk_cnt = 0; |
| 469 | } |
| 470 | |
| 471 | static int nilfs_segctor_add_file_block(struct nilfs_sc_info *sci, |
| 472 | struct buffer_head *bh, |
| 473 | struct inode *inode, |
| 474 | unsigned binfo_size) |
| 475 | { |
| 476 | struct nilfs_segment_buffer *segbuf; |
| 477 | int required, err = 0; |
| 478 | |
| 479 | retry: |
| 480 | segbuf = sci->sc_curseg; |
| 481 | required = nilfs_segctor_segsum_block_required( |
| 482 | sci, &sci->sc_binfo_ptr, binfo_size); |
| 483 | if (segbuf->sb_sum.nblocks + required + 1 > segbuf->sb_rest_blocks) { |
| 484 | nilfs_segctor_end_finfo(sci, inode); |
| 485 | err = nilfs_segctor_feed_segment(sci); |
| 486 | if (err) |
| 487 | return err; |
| 488 | goto retry; |
| 489 | } |
| 490 | if (unlikely(required)) { |
| 491 | err = nilfs_segbuf_extend_segsum(segbuf); |
| 492 | if (unlikely(err)) |
| 493 | goto failed; |
| 494 | } |
| 495 | if (sci->sc_blk_cnt == 0) |
| 496 | nilfs_segctor_begin_finfo(sci, inode); |
| 497 | |
| 498 | nilfs_segctor_map_segsum_entry(sci, &sci->sc_binfo_ptr, binfo_size); |
| 499 | /* Substitution to vblocknr is delayed until update_blocknr() */ |
| 500 | nilfs_segbuf_add_file_buffer(segbuf, bh); |
| 501 | sci->sc_blk_cnt++; |
| 502 | failed: |
| 503 | return err; |
| 504 | } |
| 505 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 506 | /* |
| 507 | * Callback functions that enumerate, mark, and collect dirty blocks |
| 508 | */ |
| 509 | static int nilfs_collect_file_data(struct nilfs_sc_info *sci, |
| 510 | struct buffer_head *bh, struct inode *inode) |
| 511 | { |
| 512 | int err; |
| 513 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 514 | err = nilfs_bmap_propagate(NILFS_I(inode)->i_bmap, bh); |
Ryusuke Konishi | e828949 | 2010-11-19 15:26:20 +0900 | [diff] [blame] | 515 | if (err < 0) |
| 516 | return err; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 517 | |
| 518 | err = nilfs_segctor_add_file_block(sci, bh, inode, |
| 519 | sizeof(struct nilfs_binfo_v)); |
| 520 | if (!err) |
| 521 | sci->sc_datablk_cnt++; |
| 522 | return err; |
| 523 | } |
| 524 | |
| 525 | static int nilfs_collect_file_node(struct nilfs_sc_info *sci, |
| 526 | struct buffer_head *bh, |
| 527 | struct inode *inode) |
| 528 | { |
Ryusuke Konishi | e828949 | 2010-11-19 15:26:20 +0900 | [diff] [blame] | 529 | return nilfs_bmap_propagate(NILFS_I(inode)->i_bmap, bh); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 530 | } |
| 531 | |
| 532 | static int nilfs_collect_file_bmap(struct nilfs_sc_info *sci, |
| 533 | struct buffer_head *bh, |
| 534 | struct inode *inode) |
| 535 | { |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 536 | WARN_ON(!buffer_dirty(bh)); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 537 | return nilfs_segctor_add_file_block(sci, bh, inode, sizeof(__le64)); |
| 538 | } |
| 539 | |
| 540 | static void nilfs_write_file_data_binfo(struct nilfs_sc_info *sci, |
| 541 | struct nilfs_segsum_pointer *ssp, |
| 542 | union nilfs_binfo *binfo) |
| 543 | { |
| 544 | struct nilfs_binfo_v *binfo_v = nilfs_segctor_map_segsum_entry( |
| 545 | sci, ssp, sizeof(*binfo_v)); |
| 546 | *binfo_v = binfo->bi_v; |
| 547 | } |
| 548 | |
| 549 | static void nilfs_write_file_node_binfo(struct nilfs_sc_info *sci, |
| 550 | struct nilfs_segsum_pointer *ssp, |
| 551 | union nilfs_binfo *binfo) |
| 552 | { |
| 553 | __le64 *vblocknr = nilfs_segctor_map_segsum_entry( |
| 554 | sci, ssp, sizeof(*vblocknr)); |
| 555 | *vblocknr = binfo->bi_v.bi_vblocknr; |
| 556 | } |
| 557 | |
Ryusuke Konishi | 4e81950 | 2010-04-23 17:35:23 +0900 | [diff] [blame] | 558 | static struct nilfs_sc_operations nilfs_sc_file_ops = { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 559 | .collect_data = nilfs_collect_file_data, |
| 560 | .collect_node = nilfs_collect_file_node, |
| 561 | .collect_bmap = nilfs_collect_file_bmap, |
| 562 | .write_data_binfo = nilfs_write_file_data_binfo, |
| 563 | .write_node_binfo = nilfs_write_file_node_binfo, |
| 564 | }; |
| 565 | |
| 566 | static int nilfs_collect_dat_data(struct nilfs_sc_info *sci, |
| 567 | struct buffer_head *bh, struct inode *inode) |
| 568 | { |
| 569 | int err; |
| 570 | |
| 571 | err = nilfs_bmap_propagate(NILFS_I(inode)->i_bmap, bh); |
Ryusuke Konishi | e828949 | 2010-11-19 15:26:20 +0900 | [diff] [blame] | 572 | if (err < 0) |
| 573 | return err; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 574 | |
| 575 | err = nilfs_segctor_add_file_block(sci, bh, inode, sizeof(__le64)); |
| 576 | if (!err) |
| 577 | sci->sc_datablk_cnt++; |
| 578 | return err; |
| 579 | } |
| 580 | |
| 581 | static int nilfs_collect_dat_bmap(struct nilfs_sc_info *sci, |
| 582 | struct buffer_head *bh, struct inode *inode) |
| 583 | { |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 584 | WARN_ON(!buffer_dirty(bh)); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 585 | return nilfs_segctor_add_file_block(sci, bh, inode, |
| 586 | sizeof(struct nilfs_binfo_dat)); |
| 587 | } |
| 588 | |
| 589 | static void nilfs_write_dat_data_binfo(struct nilfs_sc_info *sci, |
| 590 | struct nilfs_segsum_pointer *ssp, |
| 591 | union nilfs_binfo *binfo) |
| 592 | { |
| 593 | __le64 *blkoff = nilfs_segctor_map_segsum_entry(sci, ssp, |
| 594 | sizeof(*blkoff)); |
| 595 | *blkoff = binfo->bi_dat.bi_blkoff; |
| 596 | } |
| 597 | |
| 598 | static void nilfs_write_dat_node_binfo(struct nilfs_sc_info *sci, |
| 599 | struct nilfs_segsum_pointer *ssp, |
| 600 | union nilfs_binfo *binfo) |
| 601 | { |
| 602 | struct nilfs_binfo_dat *binfo_dat = |
| 603 | nilfs_segctor_map_segsum_entry(sci, ssp, sizeof(*binfo_dat)); |
| 604 | *binfo_dat = binfo->bi_dat; |
| 605 | } |
| 606 | |
Ryusuke Konishi | 4e81950 | 2010-04-23 17:35:23 +0900 | [diff] [blame] | 607 | static struct nilfs_sc_operations nilfs_sc_dat_ops = { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 608 | .collect_data = nilfs_collect_dat_data, |
| 609 | .collect_node = nilfs_collect_file_node, |
| 610 | .collect_bmap = nilfs_collect_dat_bmap, |
| 611 | .write_data_binfo = nilfs_write_dat_data_binfo, |
| 612 | .write_node_binfo = nilfs_write_dat_node_binfo, |
| 613 | }; |
| 614 | |
Ryusuke Konishi | 4e81950 | 2010-04-23 17:35:23 +0900 | [diff] [blame] | 615 | static struct nilfs_sc_operations nilfs_sc_dsync_ops = { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 616 | .collect_data = nilfs_collect_file_data, |
| 617 | .collect_node = NULL, |
| 618 | .collect_bmap = NULL, |
| 619 | .write_data_binfo = nilfs_write_file_data_binfo, |
| 620 | .write_node_binfo = NULL, |
| 621 | }; |
| 622 | |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 623 | static size_t nilfs_lookup_dirty_data_buffers(struct inode *inode, |
| 624 | struct list_head *listp, |
| 625 | size_t nlimit, |
| 626 | loff_t start, loff_t end) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 627 | { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 628 | struct address_space *mapping = inode->i_mapping; |
| 629 | struct pagevec pvec; |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 630 | pgoff_t index = 0, last = ULONG_MAX; |
| 631 | size_t ndirties = 0; |
| 632 | int i; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 633 | |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 634 | if (unlikely(start != 0 || end != LLONG_MAX)) { |
| 635 | /* |
| 636 | * A valid range is given for sync-ing data pages. The |
| 637 | * range is rounded to per-page; extra dirty buffers |
| 638 | * may be included if blocksize < pagesize. |
| 639 | */ |
| 640 | index = start >> PAGE_SHIFT; |
| 641 | last = end >> PAGE_SHIFT; |
| 642 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 643 | pagevec_init(&pvec, 0); |
| 644 | repeat: |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 645 | if (unlikely(index > last) || |
| 646 | !pagevec_lookup_tag(&pvec, mapping, &index, PAGECACHE_TAG_DIRTY, |
| 647 | min_t(pgoff_t, last - index, |
| 648 | PAGEVEC_SIZE - 1) + 1)) |
| 649 | return ndirties; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 650 | |
| 651 | for (i = 0; i < pagevec_count(&pvec); i++) { |
| 652 | struct buffer_head *bh, *head; |
| 653 | struct page *page = pvec.pages[i]; |
| 654 | |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 655 | if (unlikely(page->index > last)) |
| 656 | break; |
| 657 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 658 | if (mapping->host) { |
| 659 | lock_page(page); |
| 660 | if (!page_has_buffers(page)) |
| 661 | create_empty_buffers(page, |
| 662 | 1 << inode->i_blkbits, 0); |
| 663 | unlock_page(page); |
| 664 | } |
| 665 | |
| 666 | bh = head = page_buffers(page); |
| 667 | do { |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 668 | if (!buffer_dirty(bh)) |
| 669 | continue; |
| 670 | get_bh(bh); |
| 671 | list_add_tail(&bh->b_assoc_buffers, listp); |
| 672 | ndirties++; |
| 673 | if (unlikely(ndirties >= nlimit)) { |
| 674 | pagevec_release(&pvec); |
| 675 | cond_resched(); |
| 676 | return ndirties; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 677 | } |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 678 | } while (bh = bh->b_this_page, bh != head); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 679 | } |
| 680 | pagevec_release(&pvec); |
| 681 | cond_resched(); |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 682 | goto repeat; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 683 | } |
| 684 | |
| 685 | static void nilfs_lookup_dirty_node_buffers(struct inode *inode, |
| 686 | struct list_head *listp) |
| 687 | { |
| 688 | struct nilfs_inode_info *ii = NILFS_I(inode); |
| 689 | struct address_space *mapping = &ii->i_btnode_cache; |
| 690 | struct pagevec pvec; |
| 691 | struct buffer_head *bh, *head; |
| 692 | unsigned int i; |
| 693 | pgoff_t index = 0; |
| 694 | |
| 695 | pagevec_init(&pvec, 0); |
| 696 | |
| 697 | while (pagevec_lookup_tag(&pvec, mapping, &index, PAGECACHE_TAG_DIRTY, |
| 698 | PAGEVEC_SIZE)) { |
| 699 | for (i = 0; i < pagevec_count(&pvec); i++) { |
| 700 | bh = head = page_buffers(pvec.pages[i]); |
| 701 | do { |
| 702 | if (buffer_dirty(bh)) { |
| 703 | get_bh(bh); |
| 704 | list_add_tail(&bh->b_assoc_buffers, |
| 705 | listp); |
| 706 | } |
| 707 | bh = bh->b_this_page; |
| 708 | } while (bh != head); |
| 709 | } |
| 710 | pagevec_release(&pvec); |
| 711 | cond_resched(); |
| 712 | } |
| 713 | } |
| 714 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 715 | static void nilfs_dispose_list(struct the_nilfs *nilfs, |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 716 | struct list_head *head, int force) |
| 717 | { |
| 718 | struct nilfs_inode_info *ii, *n; |
| 719 | struct nilfs_inode_info *ivec[SC_N_INODEVEC], **pii; |
| 720 | unsigned nv = 0; |
| 721 | |
| 722 | while (!list_empty(head)) { |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 723 | spin_lock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 724 | list_for_each_entry_safe(ii, n, head, i_dirty) { |
| 725 | list_del_init(&ii->i_dirty); |
| 726 | if (force) { |
| 727 | if (unlikely(ii->i_bh)) { |
| 728 | brelse(ii->i_bh); |
| 729 | ii->i_bh = NULL; |
| 730 | } |
| 731 | } else if (test_bit(NILFS_I_DIRTY, &ii->i_state)) { |
| 732 | set_bit(NILFS_I_QUEUED, &ii->i_state); |
| 733 | list_add_tail(&ii->i_dirty, |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 734 | &nilfs->ns_dirty_files); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 735 | continue; |
| 736 | } |
| 737 | ivec[nv++] = ii; |
| 738 | if (nv == SC_N_INODEVEC) |
| 739 | break; |
| 740 | } |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 741 | spin_unlock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 742 | |
| 743 | for (pii = ivec; nv > 0; pii++, nv--) |
| 744 | iput(&(*pii)->vfs_inode); |
| 745 | } |
| 746 | } |
| 747 | |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 748 | static int nilfs_test_metadata_dirty(struct the_nilfs *nilfs, |
| 749 | struct nilfs_root *root) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 750 | { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 751 | int ret = 0; |
| 752 | |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 753 | if (nilfs_mdt_fetch_dirty(root->ifile)) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 754 | ret++; |
| 755 | if (nilfs_mdt_fetch_dirty(nilfs->ns_cpfile)) |
| 756 | ret++; |
| 757 | if (nilfs_mdt_fetch_dirty(nilfs->ns_sufile)) |
| 758 | ret++; |
Ryusuke Konishi | 365e215 | 2010-12-27 00:07:30 +0900 | [diff] [blame] | 759 | if ((ret || nilfs_doing_gc()) && nilfs_mdt_fetch_dirty(nilfs->ns_dat)) |
| 760 | ret++; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 761 | return ret; |
| 762 | } |
| 763 | |
| 764 | static int nilfs_segctor_clean(struct nilfs_sc_info *sci) |
| 765 | { |
| 766 | return list_empty(&sci->sc_dirty_files) && |
| 767 | !test_bit(NILFS_SC_DIRTY, &sci->sc_flags) && |
Ryusuke Konishi | 071cb4b | 2009-05-16 23:44:55 +0900 | [diff] [blame] | 768 | sci->sc_nfreesegs == 0 && |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 769 | (!nilfs_doing_gc() || list_empty(&sci->sc_gc_inodes)); |
| 770 | } |
| 771 | |
| 772 | static int nilfs_segctor_confirm(struct nilfs_sc_info *sci) |
| 773 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 774 | struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 775 | int ret = 0; |
| 776 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 777 | if (nilfs_test_metadata_dirty(nilfs, sci->sc_root)) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 778 | set_bit(NILFS_SC_DIRTY, &sci->sc_flags); |
| 779 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 780 | spin_lock(&nilfs->ns_inode_lock); |
| 781 | if (list_empty(&nilfs->ns_dirty_files) && nilfs_segctor_clean(sci)) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 782 | ret++; |
| 783 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 784 | spin_unlock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 785 | return ret; |
| 786 | } |
| 787 | |
| 788 | static void nilfs_segctor_clear_metadata_dirty(struct nilfs_sc_info *sci) |
| 789 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 790 | struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 791 | |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 792 | nilfs_mdt_clear_dirty(sci->sc_root->ifile); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 793 | nilfs_mdt_clear_dirty(nilfs->ns_cpfile); |
| 794 | nilfs_mdt_clear_dirty(nilfs->ns_sufile); |
Ryusuke Konishi | 365e215 | 2010-12-27 00:07:30 +0900 | [diff] [blame] | 795 | nilfs_mdt_clear_dirty(nilfs->ns_dat); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 796 | } |
| 797 | |
| 798 | static int nilfs_segctor_create_checkpoint(struct nilfs_sc_info *sci) |
| 799 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 800 | struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 801 | struct buffer_head *bh_cp; |
| 802 | struct nilfs_checkpoint *raw_cp; |
| 803 | int err; |
| 804 | |
| 805 | /* XXX: this interface will be changed */ |
| 806 | err = nilfs_cpfile_get_checkpoint(nilfs->ns_cpfile, nilfs->ns_cno, 1, |
| 807 | &raw_cp, &bh_cp); |
| 808 | if (likely(!err)) { |
| 809 | /* The following code is duplicated with cpfile. But, it is |
| 810 | needed to collect the checkpoint even if it was not newly |
| 811 | created */ |
| 812 | nilfs_mdt_mark_buffer_dirty(bh_cp); |
| 813 | nilfs_mdt_mark_dirty(nilfs->ns_cpfile); |
| 814 | nilfs_cpfile_put_checkpoint( |
| 815 | nilfs->ns_cpfile, nilfs->ns_cno, bh_cp); |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 816 | } else |
| 817 | WARN_ON(err == -EINVAL || err == -ENOENT); |
| 818 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 819 | return err; |
| 820 | } |
| 821 | |
| 822 | static int nilfs_segctor_fill_in_checkpoint(struct nilfs_sc_info *sci) |
| 823 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 824 | struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 825 | struct buffer_head *bh_cp; |
| 826 | struct nilfs_checkpoint *raw_cp; |
| 827 | int err; |
| 828 | |
| 829 | err = nilfs_cpfile_get_checkpoint(nilfs->ns_cpfile, nilfs->ns_cno, 0, |
| 830 | &raw_cp, &bh_cp); |
| 831 | if (unlikely(err)) { |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 832 | WARN_ON(err == -EINVAL || err == -ENOENT); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 833 | goto failed_ibh; |
| 834 | } |
| 835 | raw_cp->cp_snapshot_list.ssl_next = 0; |
| 836 | raw_cp->cp_snapshot_list.ssl_prev = 0; |
| 837 | raw_cp->cp_inodes_count = |
Ryusuke Konishi | b7c0634 | 2010-08-14 14:48:32 +0900 | [diff] [blame] | 838 | cpu_to_le64(atomic_read(&sci->sc_root->inodes_count)); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 839 | raw_cp->cp_blocks_count = |
Ryusuke Konishi | b7c0634 | 2010-08-14 14:48:32 +0900 | [diff] [blame] | 840 | cpu_to_le64(atomic_read(&sci->sc_root->blocks_count)); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 841 | raw_cp->cp_nblk_inc = |
| 842 | cpu_to_le64(sci->sc_nblk_inc + sci->sc_nblk_this_inc); |
| 843 | raw_cp->cp_create = cpu_to_le64(sci->sc_seg_ctime); |
| 844 | raw_cp->cp_cno = cpu_to_le64(nilfs->ns_cno); |
Ryusuke Konishi | 458c5b0 | 2009-04-06 19:01:56 -0700 | [diff] [blame] | 845 | |
Ryusuke Konishi | c96fa46 | 2009-04-06 19:01:57 -0700 | [diff] [blame] | 846 | if (test_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags)) |
| 847 | nilfs_checkpoint_clear_minor(raw_cp); |
| 848 | else |
| 849 | nilfs_checkpoint_set_minor(raw_cp); |
| 850 | |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 851 | nilfs_write_inode_common(sci->sc_root->ifile, |
| 852 | &raw_cp->cp_ifile_inode, 1); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 853 | nilfs_cpfile_put_checkpoint(nilfs->ns_cpfile, nilfs->ns_cno, bh_cp); |
| 854 | return 0; |
| 855 | |
| 856 | failed_ibh: |
| 857 | return err; |
| 858 | } |
| 859 | |
| 860 | static void nilfs_fill_in_file_bmap(struct inode *ifile, |
| 861 | struct nilfs_inode_info *ii) |
| 862 | |
| 863 | { |
| 864 | struct buffer_head *ibh; |
| 865 | struct nilfs_inode *raw_inode; |
| 866 | |
| 867 | if (test_bit(NILFS_I_BMAP, &ii->i_state)) { |
| 868 | ibh = ii->i_bh; |
| 869 | BUG_ON(!ibh); |
| 870 | raw_inode = nilfs_ifile_map_inode(ifile, ii->vfs_inode.i_ino, |
| 871 | ibh); |
| 872 | nilfs_bmap_write(ii->i_bmap, raw_inode); |
| 873 | nilfs_ifile_unmap_inode(ifile, ii->vfs_inode.i_ino, ibh); |
| 874 | } |
| 875 | } |
| 876 | |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 877 | static void nilfs_segctor_fill_in_file_bmap(struct nilfs_sc_info *sci) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 878 | { |
| 879 | struct nilfs_inode_info *ii; |
| 880 | |
| 881 | list_for_each_entry(ii, &sci->sc_dirty_files, i_dirty) { |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 882 | nilfs_fill_in_file_bmap(sci->sc_root->ifile, ii); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 883 | set_bit(NILFS_I_COLLECTED, &ii->i_state); |
| 884 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 885 | } |
| 886 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 887 | static void nilfs_segctor_fill_in_super_root(struct nilfs_sc_info *sci, |
| 888 | struct the_nilfs *nilfs) |
| 889 | { |
Ryusuke Konishi | 1e2b68b | 2010-03-23 01:15:31 +0900 | [diff] [blame] | 890 | struct buffer_head *bh_sr; |
| 891 | struct nilfs_super_root *raw_sr; |
Ryusuke Konishi | 56eb553 | 2011-04-30 18:56:12 +0900 | [diff] [blame] | 892 | unsigned isz, srsz; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 893 | |
Ryusuke Konishi | 1e2b68b | 2010-03-23 01:15:31 +0900 | [diff] [blame] | 894 | bh_sr = NILFS_LAST_SEGBUF(&sci->sc_segbufs)->sb_super_root; |
| 895 | raw_sr = (struct nilfs_super_root *)bh_sr->b_data; |
Ryusuke Konishi | 56eb553 | 2011-04-30 18:56:12 +0900 | [diff] [blame] | 896 | isz = nilfs->ns_inode_size; |
| 897 | srsz = NILFS_SR_BYTES(isz); |
Ryusuke Konishi | 1e2b68b | 2010-03-23 01:15:31 +0900 | [diff] [blame] | 898 | |
Ryusuke Konishi | 56eb553 | 2011-04-30 18:56:12 +0900 | [diff] [blame] | 899 | raw_sr->sr_bytes = cpu_to_le16(srsz); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 900 | raw_sr->sr_nongc_ctime |
| 901 | = cpu_to_le64(nilfs_doing_gc() ? |
| 902 | nilfs->ns_nongc_ctime : sci->sc_seg_ctime); |
| 903 | raw_sr->sr_flags = 0; |
| 904 | |
Ryusuke Konishi | 365e215 | 2010-12-27 00:07:30 +0900 | [diff] [blame] | 905 | nilfs_write_inode_common(nilfs->ns_dat, (void *)raw_sr + |
Ryusuke Konishi | 3961f0e | 2009-11-13 01:55:02 +0900 | [diff] [blame] | 906 | NILFS_SR_DAT_OFFSET(isz), 1); |
| 907 | nilfs_write_inode_common(nilfs->ns_cpfile, (void *)raw_sr + |
| 908 | NILFS_SR_CPFILE_OFFSET(isz), 1); |
| 909 | nilfs_write_inode_common(nilfs->ns_sufile, (void *)raw_sr + |
| 910 | NILFS_SR_SUFILE_OFFSET(isz), 1); |
Ryusuke Konishi | 56eb553 | 2011-04-30 18:56:12 +0900 | [diff] [blame] | 911 | memset((void *)raw_sr + srsz, 0, nilfs->ns_blocksize - srsz); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 912 | } |
| 913 | |
| 914 | static void nilfs_redirty_inodes(struct list_head *head) |
| 915 | { |
| 916 | struct nilfs_inode_info *ii; |
| 917 | |
| 918 | list_for_each_entry(ii, head, i_dirty) { |
| 919 | if (test_bit(NILFS_I_COLLECTED, &ii->i_state)) |
| 920 | clear_bit(NILFS_I_COLLECTED, &ii->i_state); |
| 921 | } |
| 922 | } |
| 923 | |
| 924 | static void nilfs_drop_collected_inodes(struct list_head *head) |
| 925 | { |
| 926 | struct nilfs_inode_info *ii; |
| 927 | |
| 928 | list_for_each_entry(ii, head, i_dirty) { |
| 929 | if (!test_and_clear_bit(NILFS_I_COLLECTED, &ii->i_state)) |
| 930 | continue; |
| 931 | |
| 932 | clear_bit(NILFS_I_INODE_DIRTY, &ii->i_state); |
| 933 | set_bit(NILFS_I_UPDATED, &ii->i_state); |
| 934 | } |
| 935 | } |
| 936 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 937 | static int nilfs_segctor_apply_buffers(struct nilfs_sc_info *sci, |
| 938 | struct inode *inode, |
| 939 | struct list_head *listp, |
| 940 | int (*collect)(struct nilfs_sc_info *, |
| 941 | struct buffer_head *, |
| 942 | struct inode *)) |
| 943 | { |
| 944 | struct buffer_head *bh, *n; |
| 945 | int err = 0; |
| 946 | |
| 947 | if (collect) { |
| 948 | list_for_each_entry_safe(bh, n, listp, b_assoc_buffers) { |
| 949 | list_del_init(&bh->b_assoc_buffers); |
| 950 | err = collect(sci, bh, inode); |
| 951 | brelse(bh); |
| 952 | if (unlikely(err)) |
| 953 | goto dispose_buffers; |
| 954 | } |
| 955 | return 0; |
| 956 | } |
| 957 | |
| 958 | dispose_buffers: |
| 959 | while (!list_empty(listp)) { |
Ryusuke Konishi | 0cc128388 | 2011-05-05 12:56:51 +0900 | [diff] [blame^] | 960 | bh = list_first_entry(listp, struct buffer_head, |
| 961 | b_assoc_buffers); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 962 | list_del_init(&bh->b_assoc_buffers); |
| 963 | brelse(bh); |
| 964 | } |
| 965 | return err; |
| 966 | } |
| 967 | |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 968 | static size_t nilfs_segctor_buffer_rest(struct nilfs_sc_info *sci) |
| 969 | { |
| 970 | /* Remaining number of blocks within segment buffer */ |
| 971 | return sci->sc_segbuf_nblocks - |
| 972 | (sci->sc_nblk_this_inc + sci->sc_curseg->sb_sum.nblocks); |
| 973 | } |
| 974 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 975 | static int nilfs_segctor_scan_file(struct nilfs_sc_info *sci, |
| 976 | struct inode *inode, |
| 977 | struct nilfs_sc_operations *sc_ops) |
| 978 | { |
| 979 | LIST_HEAD(data_buffers); |
| 980 | LIST_HEAD(node_buffers); |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 981 | int err; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 982 | |
| 983 | if (!(sci->sc_stage.flags & NILFS_CF_NODE)) { |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 984 | size_t n, rest = nilfs_segctor_buffer_rest(sci); |
| 985 | |
| 986 | n = nilfs_lookup_dirty_data_buffers( |
| 987 | inode, &data_buffers, rest + 1, 0, LLONG_MAX); |
| 988 | if (n > rest) { |
| 989 | err = nilfs_segctor_apply_buffers( |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 990 | sci, inode, &data_buffers, |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 991 | sc_ops->collect_data); |
| 992 | BUG_ON(!err); /* always receive -E2BIG or true error */ |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 993 | goto break_or_fail; |
| 994 | } |
| 995 | } |
| 996 | nilfs_lookup_dirty_node_buffers(inode, &node_buffers); |
| 997 | |
| 998 | if (!(sci->sc_stage.flags & NILFS_CF_NODE)) { |
| 999 | err = nilfs_segctor_apply_buffers( |
| 1000 | sci, inode, &data_buffers, sc_ops->collect_data); |
| 1001 | if (unlikely(err)) { |
| 1002 | /* dispose node list */ |
| 1003 | nilfs_segctor_apply_buffers( |
| 1004 | sci, inode, &node_buffers, NULL); |
| 1005 | goto break_or_fail; |
| 1006 | } |
| 1007 | sci->sc_stage.flags |= NILFS_CF_NODE; |
| 1008 | } |
| 1009 | /* Collect node */ |
| 1010 | err = nilfs_segctor_apply_buffers( |
| 1011 | sci, inode, &node_buffers, sc_ops->collect_node); |
| 1012 | if (unlikely(err)) |
| 1013 | goto break_or_fail; |
| 1014 | |
| 1015 | nilfs_bmap_lookup_dirty_buffers(NILFS_I(inode)->i_bmap, &node_buffers); |
| 1016 | err = nilfs_segctor_apply_buffers( |
| 1017 | sci, inode, &node_buffers, sc_ops->collect_bmap); |
| 1018 | if (unlikely(err)) |
| 1019 | goto break_or_fail; |
| 1020 | |
| 1021 | nilfs_segctor_end_finfo(sci, inode); |
| 1022 | sci->sc_stage.flags &= ~NILFS_CF_NODE; |
| 1023 | |
| 1024 | break_or_fail: |
| 1025 | return err; |
| 1026 | } |
| 1027 | |
| 1028 | static int nilfs_segctor_scan_file_dsync(struct nilfs_sc_info *sci, |
| 1029 | struct inode *inode) |
| 1030 | { |
| 1031 | LIST_HEAD(data_buffers); |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 1032 | size_t n, rest = nilfs_segctor_buffer_rest(sci); |
| 1033 | int err; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1034 | |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 1035 | n = nilfs_lookup_dirty_data_buffers(inode, &data_buffers, rest + 1, |
| 1036 | sci->sc_dsync_start, |
| 1037 | sci->sc_dsync_end); |
| 1038 | |
| 1039 | err = nilfs_segctor_apply_buffers(sci, inode, &data_buffers, |
| 1040 | nilfs_collect_file_data); |
| 1041 | if (!err) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1042 | nilfs_segctor_end_finfo(sci, inode); |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 1043 | BUG_ON(n > rest); |
| 1044 | /* always receive -E2BIG or true error if n > rest */ |
| 1045 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1046 | return err; |
| 1047 | } |
| 1048 | |
| 1049 | static int nilfs_segctor_collect_blocks(struct nilfs_sc_info *sci, int mode) |
| 1050 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 1051 | struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1052 | struct list_head *head; |
| 1053 | struct nilfs_inode_info *ii; |
Ryusuke Konishi | 071cb4b | 2009-05-16 23:44:55 +0900 | [diff] [blame] | 1054 | size_t ndone; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1055 | int err = 0; |
| 1056 | |
| 1057 | switch (sci->sc_stage.scnt) { |
| 1058 | case NILFS_ST_INIT: |
| 1059 | /* Pre-processes */ |
| 1060 | sci->sc_stage.flags = 0; |
| 1061 | |
| 1062 | if (!test_bit(NILFS_SC_UNCLOSED, &sci->sc_flags)) { |
| 1063 | sci->sc_nblk_inc = 0; |
| 1064 | sci->sc_curseg->sb_sum.flags = NILFS_SS_LOGBGN; |
| 1065 | if (mode == SC_LSEG_DSYNC) { |
| 1066 | sci->sc_stage.scnt = NILFS_ST_DSYNC; |
| 1067 | goto dsync_mode; |
| 1068 | } |
| 1069 | } |
| 1070 | |
| 1071 | sci->sc_stage.dirty_file_ptr = NULL; |
| 1072 | sci->sc_stage.gc_inode_ptr = NULL; |
| 1073 | if (mode == SC_FLUSH_DAT) { |
| 1074 | sci->sc_stage.scnt = NILFS_ST_DAT; |
| 1075 | goto dat_stage; |
| 1076 | } |
| 1077 | sci->sc_stage.scnt++; /* Fall through */ |
| 1078 | case NILFS_ST_GC: |
| 1079 | if (nilfs_doing_gc()) { |
| 1080 | head = &sci->sc_gc_inodes; |
| 1081 | ii = list_prepare_entry(sci->sc_stage.gc_inode_ptr, |
| 1082 | head, i_dirty); |
| 1083 | list_for_each_entry_continue(ii, head, i_dirty) { |
| 1084 | err = nilfs_segctor_scan_file( |
| 1085 | sci, &ii->vfs_inode, |
| 1086 | &nilfs_sc_file_ops); |
| 1087 | if (unlikely(err)) { |
| 1088 | sci->sc_stage.gc_inode_ptr = list_entry( |
| 1089 | ii->i_dirty.prev, |
| 1090 | struct nilfs_inode_info, |
| 1091 | i_dirty); |
| 1092 | goto break_or_fail; |
| 1093 | } |
| 1094 | set_bit(NILFS_I_COLLECTED, &ii->i_state); |
| 1095 | } |
| 1096 | sci->sc_stage.gc_inode_ptr = NULL; |
| 1097 | } |
| 1098 | sci->sc_stage.scnt++; /* Fall through */ |
| 1099 | case NILFS_ST_FILE: |
| 1100 | head = &sci->sc_dirty_files; |
| 1101 | ii = list_prepare_entry(sci->sc_stage.dirty_file_ptr, head, |
| 1102 | i_dirty); |
| 1103 | list_for_each_entry_continue(ii, head, i_dirty) { |
| 1104 | clear_bit(NILFS_I_DIRTY, &ii->i_state); |
| 1105 | |
| 1106 | err = nilfs_segctor_scan_file(sci, &ii->vfs_inode, |
| 1107 | &nilfs_sc_file_ops); |
| 1108 | if (unlikely(err)) { |
| 1109 | sci->sc_stage.dirty_file_ptr = |
| 1110 | list_entry(ii->i_dirty.prev, |
| 1111 | struct nilfs_inode_info, |
| 1112 | i_dirty); |
| 1113 | goto break_or_fail; |
| 1114 | } |
| 1115 | /* sci->sc_stage.dirty_file_ptr = NILFS_I(inode); */ |
| 1116 | /* XXX: required ? */ |
| 1117 | } |
| 1118 | sci->sc_stage.dirty_file_ptr = NULL; |
| 1119 | if (mode == SC_FLUSH_FILE) { |
| 1120 | sci->sc_stage.scnt = NILFS_ST_DONE; |
| 1121 | return 0; |
| 1122 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1123 | sci->sc_stage.scnt++; |
| 1124 | sci->sc_stage.flags |= NILFS_CF_IFILE_STARTED; |
| 1125 | /* Fall through */ |
| 1126 | case NILFS_ST_IFILE: |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 1127 | err = nilfs_segctor_scan_file(sci, sci->sc_root->ifile, |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1128 | &nilfs_sc_file_ops); |
| 1129 | if (unlikely(err)) |
| 1130 | break; |
| 1131 | sci->sc_stage.scnt++; |
| 1132 | /* Creating a checkpoint */ |
| 1133 | err = nilfs_segctor_create_checkpoint(sci); |
| 1134 | if (unlikely(err)) |
| 1135 | break; |
| 1136 | /* Fall through */ |
| 1137 | case NILFS_ST_CPFILE: |
| 1138 | err = nilfs_segctor_scan_file(sci, nilfs->ns_cpfile, |
| 1139 | &nilfs_sc_file_ops); |
| 1140 | if (unlikely(err)) |
| 1141 | break; |
| 1142 | sci->sc_stage.scnt++; /* Fall through */ |
| 1143 | case NILFS_ST_SUFILE: |
Ryusuke Konishi | 071cb4b | 2009-05-16 23:44:55 +0900 | [diff] [blame] | 1144 | err = nilfs_sufile_freev(nilfs->ns_sufile, sci->sc_freesegs, |
| 1145 | sci->sc_nfreesegs, &ndone); |
| 1146 | if (unlikely(err)) { |
| 1147 | nilfs_sufile_cancel_freev(nilfs->ns_sufile, |
| 1148 | sci->sc_freesegs, ndone, |
| 1149 | NULL); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1150 | break; |
Ryusuke Konishi | 071cb4b | 2009-05-16 23:44:55 +0900 | [diff] [blame] | 1151 | } |
| 1152 | sci->sc_stage.flags |= NILFS_CF_SUFREED; |
| 1153 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1154 | err = nilfs_segctor_scan_file(sci, nilfs->ns_sufile, |
| 1155 | &nilfs_sc_file_ops); |
| 1156 | if (unlikely(err)) |
| 1157 | break; |
| 1158 | sci->sc_stage.scnt++; /* Fall through */ |
| 1159 | case NILFS_ST_DAT: |
| 1160 | dat_stage: |
Ryusuke Konishi | 365e215 | 2010-12-27 00:07:30 +0900 | [diff] [blame] | 1161 | err = nilfs_segctor_scan_file(sci, nilfs->ns_dat, |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1162 | &nilfs_sc_dat_ops); |
| 1163 | if (unlikely(err)) |
| 1164 | break; |
| 1165 | if (mode == SC_FLUSH_DAT) { |
| 1166 | sci->sc_stage.scnt = NILFS_ST_DONE; |
| 1167 | return 0; |
| 1168 | } |
| 1169 | sci->sc_stage.scnt++; /* Fall through */ |
| 1170 | case NILFS_ST_SR: |
| 1171 | if (mode == SC_LSEG_SR) { |
| 1172 | /* Appending a super root */ |
| 1173 | err = nilfs_segctor_add_super_root(sci); |
| 1174 | if (unlikely(err)) |
| 1175 | break; |
| 1176 | } |
| 1177 | /* End of a logical segment */ |
| 1178 | sci->sc_curseg->sb_sum.flags |= NILFS_SS_LOGEND; |
| 1179 | sci->sc_stage.scnt = NILFS_ST_DONE; |
| 1180 | return 0; |
| 1181 | case NILFS_ST_DSYNC: |
| 1182 | dsync_mode: |
| 1183 | sci->sc_curseg->sb_sum.flags |= NILFS_SS_SYNDT; |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 1184 | ii = sci->sc_dsync_inode; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1185 | if (!test_bit(NILFS_I_BUSY, &ii->i_state)) |
| 1186 | break; |
| 1187 | |
| 1188 | err = nilfs_segctor_scan_file_dsync(sci, &ii->vfs_inode); |
| 1189 | if (unlikely(err)) |
| 1190 | break; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1191 | sci->sc_curseg->sb_sum.flags |= NILFS_SS_LOGEND; |
| 1192 | sci->sc_stage.scnt = NILFS_ST_DONE; |
| 1193 | return 0; |
| 1194 | case NILFS_ST_DONE: |
| 1195 | return 0; |
| 1196 | default: |
| 1197 | BUG(); |
| 1198 | } |
| 1199 | |
| 1200 | break_or_fail: |
| 1201 | return err; |
| 1202 | } |
| 1203 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1204 | /** |
| 1205 | * nilfs_segctor_begin_construction - setup segment buffer to make a new log |
| 1206 | * @sci: nilfs_sc_info |
| 1207 | * @nilfs: nilfs object |
| 1208 | */ |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1209 | static int nilfs_segctor_begin_construction(struct nilfs_sc_info *sci, |
| 1210 | struct the_nilfs *nilfs) |
| 1211 | { |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1212 | struct nilfs_segment_buffer *segbuf, *prev; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1213 | __u64 nextnum; |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1214 | int err, alloc = 0; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1215 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1216 | segbuf = nilfs_segbuf_new(sci->sc_super); |
| 1217 | if (unlikely(!segbuf)) |
| 1218 | return -ENOMEM; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1219 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1220 | if (list_empty(&sci->sc_write_logs)) { |
| 1221 | nilfs_segbuf_map(segbuf, nilfs->ns_segnum, |
| 1222 | nilfs->ns_pseg_offset, nilfs); |
| 1223 | if (segbuf->sb_rest_blocks < NILFS_PSEG_MIN_BLOCKS) { |
| 1224 | nilfs_shift_to_next_segment(nilfs); |
| 1225 | nilfs_segbuf_map(segbuf, nilfs->ns_segnum, 0, nilfs); |
| 1226 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1227 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1228 | segbuf->sb_sum.seg_seq = nilfs->ns_seg_seq; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1229 | nextnum = nilfs->ns_nextnum; |
| 1230 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1231 | if (nilfs->ns_segnum == nilfs->ns_nextnum) |
| 1232 | /* Start from the head of a new full segment */ |
| 1233 | alloc++; |
| 1234 | } else { |
| 1235 | /* Continue logs */ |
| 1236 | prev = NILFS_LAST_SEGBUF(&sci->sc_write_logs); |
| 1237 | nilfs_segbuf_map_cont(segbuf, prev); |
| 1238 | segbuf->sb_sum.seg_seq = prev->sb_sum.seg_seq; |
| 1239 | nextnum = prev->sb_nextnum; |
| 1240 | |
| 1241 | if (segbuf->sb_rest_blocks < NILFS_PSEG_MIN_BLOCKS) { |
| 1242 | nilfs_segbuf_map(segbuf, prev->sb_nextnum, 0, nilfs); |
| 1243 | segbuf->sb_sum.seg_seq++; |
| 1244 | alloc++; |
| 1245 | } |
| 1246 | } |
| 1247 | |
| 1248 | err = nilfs_sufile_mark_dirty(nilfs->ns_sufile, segbuf->sb_segnum); |
| 1249 | if (err) |
| 1250 | goto failed; |
| 1251 | |
| 1252 | if (alloc) { |
| 1253 | err = nilfs_sufile_alloc(nilfs->ns_sufile, &nextnum); |
| 1254 | if (err) |
| 1255 | goto failed; |
| 1256 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1257 | nilfs_segbuf_set_next_segnum(segbuf, nextnum, nilfs); |
| 1258 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1259 | BUG_ON(!list_empty(&sci->sc_segbufs)); |
| 1260 | list_add_tail(&segbuf->sb_list, &sci->sc_segbufs); |
| 1261 | sci->sc_segbuf_nblocks = segbuf->sb_rest_blocks; |
Ryusuke Konishi | cece552 | 2009-04-06 19:01:58 -0700 | [diff] [blame] | 1262 | return 0; |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1263 | |
| 1264 | failed: |
| 1265 | nilfs_segbuf_free(segbuf); |
| 1266 | return err; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1267 | } |
| 1268 | |
| 1269 | static int nilfs_segctor_extend_segments(struct nilfs_sc_info *sci, |
| 1270 | struct the_nilfs *nilfs, int nadd) |
| 1271 | { |
Ryusuke Konishi | e29df39 | 2009-11-29 16:51:16 +0900 | [diff] [blame] | 1272 | struct nilfs_segment_buffer *segbuf, *prev; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1273 | struct inode *sufile = nilfs->ns_sufile; |
| 1274 | __u64 nextnextnum; |
| 1275 | LIST_HEAD(list); |
| 1276 | int err, ret, i; |
| 1277 | |
| 1278 | prev = NILFS_LAST_SEGBUF(&sci->sc_segbufs); |
| 1279 | /* |
| 1280 | * Since the segment specified with nextnum might be allocated during |
| 1281 | * the previous construction, the buffer including its segusage may |
| 1282 | * not be dirty. The following call ensures that the buffer is dirty |
| 1283 | * and will pin the buffer on memory until the sufile is written. |
| 1284 | */ |
Ryusuke Konishi | 61a189e | 2009-11-18 17:25:12 +0900 | [diff] [blame] | 1285 | err = nilfs_sufile_mark_dirty(sufile, prev->sb_nextnum); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1286 | if (unlikely(err)) |
| 1287 | return err; |
| 1288 | |
| 1289 | for (i = 0; i < nadd; i++) { |
| 1290 | /* extend segment info */ |
| 1291 | err = -ENOMEM; |
| 1292 | segbuf = nilfs_segbuf_new(sci->sc_super); |
| 1293 | if (unlikely(!segbuf)) |
| 1294 | goto failed; |
| 1295 | |
| 1296 | /* map this buffer to region of segment on-disk */ |
Ryusuke Konishi | cece552 | 2009-04-06 19:01:58 -0700 | [diff] [blame] | 1297 | nilfs_segbuf_map(segbuf, prev->sb_nextnum, 0, nilfs); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1298 | sci->sc_segbuf_nblocks += segbuf->sb_rest_blocks; |
| 1299 | |
| 1300 | /* allocate the next next full segment */ |
| 1301 | err = nilfs_sufile_alloc(sufile, &nextnextnum); |
| 1302 | if (unlikely(err)) |
| 1303 | goto failed_segbuf; |
| 1304 | |
| 1305 | segbuf->sb_sum.seg_seq = prev->sb_sum.seg_seq + 1; |
| 1306 | nilfs_segbuf_set_next_segnum(segbuf, nextnextnum, nilfs); |
| 1307 | |
| 1308 | list_add_tail(&segbuf->sb_list, &list); |
| 1309 | prev = segbuf; |
| 1310 | } |
Ryusuke Konishi | 0935db7 | 2009-11-29 02:39:11 +0900 | [diff] [blame] | 1311 | list_splice_tail(&list, &sci->sc_segbufs); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1312 | return 0; |
| 1313 | |
| 1314 | failed_segbuf: |
| 1315 | nilfs_segbuf_free(segbuf); |
| 1316 | failed: |
Ryusuke Konishi | e29df39 | 2009-11-29 16:51:16 +0900 | [diff] [blame] | 1317 | list_for_each_entry(segbuf, &list, sb_list) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1318 | ret = nilfs_sufile_free(sufile, segbuf->sb_nextnum); |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 1319 | WARN_ON(ret); /* never fails */ |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1320 | } |
Ryusuke Konishi | e29df39 | 2009-11-29 16:51:16 +0900 | [diff] [blame] | 1321 | nilfs_destroy_logs(&list); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1322 | return err; |
| 1323 | } |
| 1324 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1325 | static void nilfs_free_incomplete_logs(struct list_head *logs, |
| 1326 | struct the_nilfs *nilfs) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1327 | { |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1328 | struct nilfs_segment_buffer *segbuf, *prev; |
| 1329 | struct inode *sufile = nilfs->ns_sufile; |
Ryusuke Konishi | 9284ad2 | 2009-11-25 01:04:21 +0900 | [diff] [blame] | 1330 | int ret; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1331 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1332 | segbuf = NILFS_FIRST_SEGBUF(logs); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1333 | if (nilfs->ns_nextnum != segbuf->sb_nextnum) { |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1334 | ret = nilfs_sufile_free(sufile, segbuf->sb_nextnum); |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 1335 | WARN_ON(ret); /* never fails */ |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1336 | } |
Ryusuke Konishi | 9284ad2 | 2009-11-25 01:04:21 +0900 | [diff] [blame] | 1337 | if (atomic_read(&segbuf->sb_err)) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1338 | /* Case 1: The first segment failed */ |
| 1339 | if (segbuf->sb_pseg_start != segbuf->sb_fseg_start) |
| 1340 | /* Case 1a: Partial segment appended into an existing |
| 1341 | segment */ |
| 1342 | nilfs_terminate_segment(nilfs, segbuf->sb_fseg_start, |
| 1343 | segbuf->sb_fseg_end); |
| 1344 | else /* Case 1b: New full segment */ |
| 1345 | set_nilfs_discontinued(nilfs); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1346 | } |
| 1347 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1348 | prev = segbuf; |
| 1349 | list_for_each_entry_continue(segbuf, logs, sb_list) { |
| 1350 | if (prev->sb_nextnum != segbuf->sb_nextnum) { |
| 1351 | ret = nilfs_sufile_free(sufile, segbuf->sb_nextnum); |
| 1352 | WARN_ON(ret); /* never fails */ |
| 1353 | } |
Ryusuke Konishi | 9284ad2 | 2009-11-25 01:04:21 +0900 | [diff] [blame] | 1354 | if (atomic_read(&segbuf->sb_err) && |
| 1355 | segbuf->sb_segnum != nilfs->ns_nextnum) |
| 1356 | /* Case 2: extended segment (!= next) failed */ |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1357 | nilfs_sufile_set_error(sufile, segbuf->sb_segnum); |
| 1358 | prev = segbuf; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1359 | } |
| 1360 | } |
| 1361 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1362 | static void nilfs_segctor_update_segusage(struct nilfs_sc_info *sci, |
| 1363 | struct inode *sufile) |
| 1364 | { |
| 1365 | struct nilfs_segment_buffer *segbuf; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1366 | unsigned long live_blocks; |
| 1367 | int ret; |
| 1368 | |
| 1369 | list_for_each_entry(segbuf, &sci->sc_segbufs, sb_list) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1370 | live_blocks = segbuf->sb_sum.nblocks + |
| 1371 | (segbuf->sb_pseg_start - segbuf->sb_fseg_start); |
Ryusuke Konishi | 071ec54 | 2009-11-18 18:23:34 +0900 | [diff] [blame] | 1372 | ret = nilfs_sufile_set_segment_usage(sufile, segbuf->sb_segnum, |
| 1373 | live_blocks, |
| 1374 | sci->sc_seg_ctime); |
| 1375 | WARN_ON(ret); /* always succeed because the segusage is dirty */ |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1376 | } |
| 1377 | } |
| 1378 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1379 | static void nilfs_cancel_segusage(struct list_head *logs, struct inode *sufile) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1380 | { |
| 1381 | struct nilfs_segment_buffer *segbuf; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1382 | int ret; |
| 1383 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1384 | segbuf = NILFS_FIRST_SEGBUF(logs); |
Ryusuke Konishi | 071ec54 | 2009-11-18 18:23:34 +0900 | [diff] [blame] | 1385 | ret = nilfs_sufile_set_segment_usage(sufile, segbuf->sb_segnum, |
| 1386 | segbuf->sb_pseg_start - |
| 1387 | segbuf->sb_fseg_start, 0); |
| 1388 | WARN_ON(ret); /* always succeed because the segusage is dirty */ |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1389 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1390 | list_for_each_entry_continue(segbuf, logs, sb_list) { |
Ryusuke Konishi | 071ec54 | 2009-11-18 18:23:34 +0900 | [diff] [blame] | 1391 | ret = nilfs_sufile_set_segment_usage(sufile, segbuf->sb_segnum, |
| 1392 | 0, 0); |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 1393 | WARN_ON(ret); /* always succeed */ |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1394 | } |
| 1395 | } |
| 1396 | |
| 1397 | static void nilfs_segctor_truncate_segments(struct nilfs_sc_info *sci, |
| 1398 | struct nilfs_segment_buffer *last, |
| 1399 | struct inode *sufile) |
| 1400 | { |
Ryusuke Konishi | e29df39 | 2009-11-29 16:51:16 +0900 | [diff] [blame] | 1401 | struct nilfs_segment_buffer *segbuf = last; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1402 | int ret; |
| 1403 | |
Ryusuke Konishi | e29df39 | 2009-11-29 16:51:16 +0900 | [diff] [blame] | 1404 | list_for_each_entry_continue(segbuf, &sci->sc_segbufs, sb_list) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1405 | sci->sc_segbuf_nblocks -= segbuf->sb_rest_blocks; |
| 1406 | ret = nilfs_sufile_free(sufile, segbuf->sb_nextnum); |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 1407 | WARN_ON(ret); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1408 | } |
Ryusuke Konishi | e29df39 | 2009-11-29 16:51:16 +0900 | [diff] [blame] | 1409 | nilfs_truncate_logs(&sci->sc_segbufs, last); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1410 | } |
| 1411 | |
| 1412 | |
| 1413 | static int nilfs_segctor_collect(struct nilfs_sc_info *sci, |
| 1414 | struct the_nilfs *nilfs, int mode) |
| 1415 | { |
| 1416 | struct nilfs_cstage prev_stage = sci->sc_stage; |
| 1417 | int err, nadd = 1; |
| 1418 | |
| 1419 | /* Collection retry loop */ |
| 1420 | for (;;) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1421 | sci->sc_nblk_this_inc = 0; |
| 1422 | sci->sc_curseg = NILFS_FIRST_SEGBUF(&sci->sc_segbufs); |
| 1423 | |
| 1424 | err = nilfs_segctor_reset_segment_buffer(sci); |
| 1425 | if (unlikely(err)) |
| 1426 | goto failed; |
| 1427 | |
| 1428 | err = nilfs_segctor_collect_blocks(sci, mode); |
| 1429 | sci->sc_nblk_this_inc += sci->sc_curseg->sb_sum.nblocks; |
| 1430 | if (!err) |
| 1431 | break; |
| 1432 | |
| 1433 | if (unlikely(err != -E2BIG)) |
| 1434 | goto failed; |
| 1435 | |
| 1436 | /* The current segment is filled up */ |
| 1437 | if (mode != SC_LSEG_SR || sci->sc_stage.scnt < NILFS_ST_CPFILE) |
| 1438 | break; |
| 1439 | |
Ryusuke Konishi | 2d8428a | 2010-03-22 14:01:24 +0900 | [diff] [blame] | 1440 | nilfs_clear_logs(&sci->sc_segbufs); |
| 1441 | |
| 1442 | err = nilfs_segctor_extend_segments(sci, nilfs, nadd); |
| 1443 | if (unlikely(err)) |
| 1444 | return err; |
| 1445 | |
Ryusuke Konishi | 071cb4b | 2009-05-16 23:44:55 +0900 | [diff] [blame] | 1446 | if (sci->sc_stage.flags & NILFS_CF_SUFREED) { |
| 1447 | err = nilfs_sufile_cancel_freev(nilfs->ns_sufile, |
| 1448 | sci->sc_freesegs, |
| 1449 | sci->sc_nfreesegs, |
| 1450 | NULL); |
| 1451 | WARN_ON(err); /* do not happen */ |
| 1452 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1453 | nadd = min_t(int, nadd << 1, SC_MAX_SEGDELTA); |
| 1454 | sci->sc_stage = prev_stage; |
| 1455 | } |
| 1456 | nilfs_segctor_truncate_segments(sci, sci->sc_curseg, nilfs->ns_sufile); |
| 1457 | return 0; |
| 1458 | |
| 1459 | failed: |
| 1460 | return err; |
| 1461 | } |
| 1462 | |
| 1463 | static void nilfs_list_replace_buffer(struct buffer_head *old_bh, |
| 1464 | struct buffer_head *new_bh) |
| 1465 | { |
| 1466 | BUG_ON(!list_empty(&new_bh->b_assoc_buffers)); |
| 1467 | |
| 1468 | list_replace_init(&old_bh->b_assoc_buffers, &new_bh->b_assoc_buffers); |
| 1469 | /* The caller must release old_bh */ |
| 1470 | } |
| 1471 | |
| 1472 | static int |
| 1473 | nilfs_segctor_update_payload_blocknr(struct nilfs_sc_info *sci, |
| 1474 | struct nilfs_segment_buffer *segbuf, |
| 1475 | int mode) |
| 1476 | { |
| 1477 | struct inode *inode = NULL; |
| 1478 | sector_t blocknr; |
| 1479 | unsigned long nfinfo = segbuf->sb_sum.nfinfo; |
| 1480 | unsigned long nblocks = 0, ndatablk = 0; |
| 1481 | struct nilfs_sc_operations *sc_op = NULL; |
| 1482 | struct nilfs_segsum_pointer ssp; |
| 1483 | struct nilfs_finfo *finfo = NULL; |
| 1484 | union nilfs_binfo binfo; |
| 1485 | struct buffer_head *bh, *bh_org; |
| 1486 | ino_t ino = 0; |
| 1487 | int err = 0; |
| 1488 | |
| 1489 | if (!nfinfo) |
| 1490 | goto out; |
| 1491 | |
| 1492 | blocknr = segbuf->sb_pseg_start + segbuf->sb_sum.nsumblk; |
| 1493 | ssp.bh = NILFS_SEGBUF_FIRST_BH(&segbuf->sb_segsum_buffers); |
| 1494 | ssp.offset = sizeof(struct nilfs_segment_summary); |
| 1495 | |
| 1496 | list_for_each_entry(bh, &segbuf->sb_payload_buffers, b_assoc_buffers) { |
Ryusuke Konishi | 1e2b68b | 2010-03-23 01:15:31 +0900 | [diff] [blame] | 1497 | if (bh == segbuf->sb_super_root) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1498 | break; |
| 1499 | if (!finfo) { |
| 1500 | finfo = nilfs_segctor_map_segsum_entry( |
| 1501 | sci, &ssp, sizeof(*finfo)); |
| 1502 | ino = le64_to_cpu(finfo->fi_ino); |
| 1503 | nblocks = le32_to_cpu(finfo->fi_nblocks); |
| 1504 | ndatablk = le32_to_cpu(finfo->fi_ndatablk); |
| 1505 | |
| 1506 | if (buffer_nilfs_node(bh)) |
| 1507 | inode = NILFS_BTNC_I(bh->b_page->mapping); |
| 1508 | else |
| 1509 | inode = NILFS_AS_I(bh->b_page->mapping); |
| 1510 | |
| 1511 | if (mode == SC_LSEG_DSYNC) |
| 1512 | sc_op = &nilfs_sc_dsync_ops; |
| 1513 | else if (ino == NILFS_DAT_INO) |
| 1514 | sc_op = &nilfs_sc_dat_ops; |
| 1515 | else /* file blocks */ |
| 1516 | sc_op = &nilfs_sc_file_ops; |
| 1517 | } |
| 1518 | bh_org = bh; |
| 1519 | get_bh(bh_org); |
| 1520 | err = nilfs_bmap_assign(NILFS_I(inode)->i_bmap, &bh, blocknr, |
| 1521 | &binfo); |
| 1522 | if (bh != bh_org) |
| 1523 | nilfs_list_replace_buffer(bh_org, bh); |
| 1524 | brelse(bh_org); |
| 1525 | if (unlikely(err)) |
| 1526 | goto failed_bmap; |
| 1527 | |
| 1528 | if (ndatablk > 0) |
| 1529 | sc_op->write_data_binfo(sci, &ssp, &binfo); |
| 1530 | else |
| 1531 | sc_op->write_node_binfo(sci, &ssp, &binfo); |
| 1532 | |
| 1533 | blocknr++; |
| 1534 | if (--nblocks == 0) { |
| 1535 | finfo = NULL; |
| 1536 | if (--nfinfo == 0) |
| 1537 | break; |
| 1538 | } else if (ndatablk > 0) |
| 1539 | ndatablk--; |
| 1540 | } |
| 1541 | out: |
| 1542 | return 0; |
| 1543 | |
| 1544 | failed_bmap: |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1545 | return err; |
| 1546 | } |
| 1547 | |
| 1548 | static int nilfs_segctor_assign(struct nilfs_sc_info *sci, int mode) |
| 1549 | { |
| 1550 | struct nilfs_segment_buffer *segbuf; |
| 1551 | int err; |
| 1552 | |
| 1553 | list_for_each_entry(segbuf, &sci->sc_segbufs, sb_list) { |
| 1554 | err = nilfs_segctor_update_payload_blocknr(sci, segbuf, mode); |
| 1555 | if (unlikely(err)) |
| 1556 | return err; |
| 1557 | nilfs_segbuf_fill_in_segsum(segbuf); |
| 1558 | } |
| 1559 | return 0; |
| 1560 | } |
| 1561 | |
Ryusuke Konishi | 1cb2d38 | 2011-04-04 12:53:28 +0900 | [diff] [blame] | 1562 | static void nilfs_begin_page_io(struct page *page) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1563 | { |
| 1564 | if (!page || PageWriteback(page)) |
| 1565 | /* For split b-tree node pages, this function may be called |
| 1566 | twice. We ignore the 2nd or later calls by this check. */ |
Ryusuke Konishi | 1cb2d38 | 2011-04-04 12:53:28 +0900 | [diff] [blame] | 1567 | return; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1568 | |
| 1569 | lock_page(page); |
| 1570 | clear_page_dirty_for_io(page); |
| 1571 | set_page_writeback(page); |
| 1572 | unlock_page(page); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1573 | } |
| 1574 | |
Ryusuke Konishi | 1cb2d38 | 2011-04-04 12:53:28 +0900 | [diff] [blame] | 1575 | static void nilfs_segctor_prepare_write(struct nilfs_sc_info *sci) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1576 | { |
| 1577 | struct nilfs_segment_buffer *segbuf; |
| 1578 | struct page *bd_page = NULL, *fs_page = NULL; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1579 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1580 | list_for_each_entry(segbuf, &sci->sc_segbufs, sb_list) { |
| 1581 | struct buffer_head *bh; |
| 1582 | |
| 1583 | list_for_each_entry(bh, &segbuf->sb_segsum_buffers, |
| 1584 | b_assoc_buffers) { |
| 1585 | if (bh->b_page != bd_page) { |
| 1586 | if (bd_page) { |
| 1587 | lock_page(bd_page); |
| 1588 | clear_page_dirty_for_io(bd_page); |
| 1589 | set_page_writeback(bd_page); |
| 1590 | unlock_page(bd_page); |
| 1591 | } |
| 1592 | bd_page = bh->b_page; |
| 1593 | } |
| 1594 | } |
| 1595 | |
| 1596 | list_for_each_entry(bh, &segbuf->sb_payload_buffers, |
| 1597 | b_assoc_buffers) { |
Ryusuke Konishi | 1e2b68b | 2010-03-23 01:15:31 +0900 | [diff] [blame] | 1598 | if (bh == segbuf->sb_super_root) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1599 | if (bh->b_page != bd_page) { |
| 1600 | lock_page(bd_page); |
| 1601 | clear_page_dirty_for_io(bd_page); |
| 1602 | set_page_writeback(bd_page); |
| 1603 | unlock_page(bd_page); |
| 1604 | bd_page = bh->b_page; |
| 1605 | } |
| 1606 | break; |
| 1607 | } |
| 1608 | if (bh->b_page != fs_page) { |
Ryusuke Konishi | 1cb2d38 | 2011-04-04 12:53:28 +0900 | [diff] [blame] | 1609 | nilfs_begin_page_io(fs_page); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1610 | fs_page = bh->b_page; |
| 1611 | } |
| 1612 | } |
| 1613 | } |
| 1614 | if (bd_page) { |
| 1615 | lock_page(bd_page); |
| 1616 | clear_page_dirty_for_io(bd_page); |
| 1617 | set_page_writeback(bd_page); |
| 1618 | unlock_page(bd_page); |
| 1619 | } |
Ryusuke Konishi | 1cb2d38 | 2011-04-04 12:53:28 +0900 | [diff] [blame] | 1620 | nilfs_begin_page_io(fs_page); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1621 | } |
| 1622 | |
| 1623 | static int nilfs_segctor_write(struct nilfs_sc_info *sci, |
Ryusuke Konishi | 9c965ba | 2009-11-29 01:17:31 +0900 | [diff] [blame] | 1624 | struct the_nilfs *nilfs) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1625 | { |
Ryusuke Konishi | d1c6b72 | 2009-12-17 00:55:40 +0900 | [diff] [blame] | 1626 | int ret; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1627 | |
Ryusuke Konishi | d1c6b72 | 2009-12-17 00:55:40 +0900 | [diff] [blame] | 1628 | ret = nilfs_write_logs(&sci->sc_segbufs, nilfs); |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1629 | list_splice_tail_init(&sci->sc_segbufs, &sci->sc_write_logs); |
| 1630 | return ret; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1631 | } |
| 1632 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1633 | static void nilfs_end_page_io(struct page *page, int err) |
| 1634 | { |
| 1635 | if (!page) |
| 1636 | return; |
| 1637 | |
Ryusuke Konishi | a977784 | 2009-07-28 17:55:29 +0900 | [diff] [blame] | 1638 | if (buffer_nilfs_node(page_buffers(page)) && !PageWriteback(page)) { |
Ryusuke Konishi | 8227b29 | 2009-06-18 23:52:23 +0900 | [diff] [blame] | 1639 | /* |
| 1640 | * For b-tree node pages, this function may be called twice |
| 1641 | * or more because they might be split in a segment. |
| 1642 | */ |
Ryusuke Konishi | a977784 | 2009-07-28 17:55:29 +0900 | [diff] [blame] | 1643 | if (PageDirty(page)) { |
| 1644 | /* |
| 1645 | * For pages holding split b-tree node buffers, dirty |
| 1646 | * flag on the buffers may be cleared discretely. |
| 1647 | * In that case, the page is once redirtied for |
| 1648 | * remaining buffers, and it must be cancelled if |
| 1649 | * all the buffers get cleaned later. |
| 1650 | */ |
| 1651 | lock_page(page); |
| 1652 | if (nilfs_page_buffers_clean(page)) |
| 1653 | __nilfs_clear_page_dirty(page); |
| 1654 | unlock_page(page); |
| 1655 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1656 | return; |
Ryusuke Konishi | a977784 | 2009-07-28 17:55:29 +0900 | [diff] [blame] | 1657 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1658 | |
Ryusuke Konishi | 1cb2d38 | 2011-04-04 12:53:28 +0900 | [diff] [blame] | 1659 | if (!err) { |
| 1660 | if (!nilfs_page_buffers_clean(page)) |
| 1661 | __set_page_dirty_nobuffers(page); |
| 1662 | ClearPageError(page); |
| 1663 | } else { |
| 1664 | __set_page_dirty_nobuffers(page); |
| 1665 | SetPageError(page); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1666 | } |
Ryusuke Konishi | 1cb2d38 | 2011-04-04 12:53:28 +0900 | [diff] [blame] | 1667 | |
| 1668 | end_page_writeback(page); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1669 | } |
| 1670 | |
Ryusuke Konishi | 1cb2d38 | 2011-04-04 12:53:28 +0900 | [diff] [blame] | 1671 | static void nilfs_abort_logs(struct list_head *logs, int err) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1672 | { |
| 1673 | struct nilfs_segment_buffer *segbuf; |
| 1674 | struct page *bd_page = NULL, *fs_page = NULL; |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1675 | struct buffer_head *bh; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1676 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1677 | if (list_empty(logs)) |
| 1678 | return; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1679 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1680 | list_for_each_entry(segbuf, logs, sb_list) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1681 | list_for_each_entry(bh, &segbuf->sb_segsum_buffers, |
| 1682 | b_assoc_buffers) { |
| 1683 | if (bh->b_page != bd_page) { |
| 1684 | if (bd_page) |
| 1685 | end_page_writeback(bd_page); |
| 1686 | bd_page = bh->b_page; |
| 1687 | } |
| 1688 | } |
| 1689 | |
| 1690 | list_for_each_entry(bh, &segbuf->sb_payload_buffers, |
| 1691 | b_assoc_buffers) { |
Ryusuke Konishi | 1e2b68b | 2010-03-23 01:15:31 +0900 | [diff] [blame] | 1692 | if (bh == segbuf->sb_super_root) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1693 | if (bh->b_page != bd_page) { |
| 1694 | end_page_writeback(bd_page); |
| 1695 | bd_page = bh->b_page; |
| 1696 | } |
| 1697 | break; |
| 1698 | } |
| 1699 | if (bh->b_page != fs_page) { |
| 1700 | nilfs_end_page_io(fs_page, err); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1701 | fs_page = bh->b_page; |
| 1702 | } |
| 1703 | } |
| 1704 | } |
| 1705 | if (bd_page) |
| 1706 | end_page_writeback(bd_page); |
| 1707 | |
| 1708 | nilfs_end_page_io(fs_page, err); |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1709 | } |
| 1710 | |
| 1711 | static void nilfs_segctor_abort_construction(struct nilfs_sc_info *sci, |
| 1712 | struct the_nilfs *nilfs, int err) |
| 1713 | { |
| 1714 | LIST_HEAD(logs); |
| 1715 | int ret; |
| 1716 | |
| 1717 | list_splice_tail_init(&sci->sc_write_logs, &logs); |
| 1718 | ret = nilfs_wait_on_logs(&logs); |
Ryusuke Konishi | 1cb2d38 | 2011-04-04 12:53:28 +0900 | [diff] [blame] | 1719 | nilfs_abort_logs(&logs, ret ? : err); |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1720 | |
| 1721 | list_splice_tail_init(&sci->sc_segbufs, &logs); |
| 1722 | nilfs_cancel_segusage(&logs, nilfs->ns_sufile); |
| 1723 | nilfs_free_incomplete_logs(&logs, nilfs); |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1724 | |
| 1725 | if (sci->sc_stage.flags & NILFS_CF_SUFREED) { |
| 1726 | ret = nilfs_sufile_cancel_freev(nilfs->ns_sufile, |
| 1727 | sci->sc_freesegs, |
| 1728 | sci->sc_nfreesegs, |
| 1729 | NULL); |
| 1730 | WARN_ON(ret); /* do not happen */ |
| 1731 | } |
| 1732 | |
| 1733 | nilfs_destroy_logs(&logs); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1734 | } |
| 1735 | |
| 1736 | static void nilfs_set_next_segment(struct the_nilfs *nilfs, |
| 1737 | struct nilfs_segment_buffer *segbuf) |
| 1738 | { |
| 1739 | nilfs->ns_segnum = segbuf->sb_segnum; |
| 1740 | nilfs->ns_nextnum = segbuf->sb_nextnum; |
| 1741 | nilfs->ns_pseg_offset = segbuf->sb_pseg_start - segbuf->sb_fseg_start |
| 1742 | + segbuf->sb_sum.nblocks; |
| 1743 | nilfs->ns_seg_seq = segbuf->sb_sum.seg_seq; |
| 1744 | nilfs->ns_ctime = segbuf->sb_sum.ctime; |
| 1745 | } |
| 1746 | |
| 1747 | static void nilfs_segctor_complete_write(struct nilfs_sc_info *sci) |
| 1748 | { |
| 1749 | struct nilfs_segment_buffer *segbuf; |
| 1750 | struct page *bd_page = NULL, *fs_page = NULL; |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 1751 | struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
Ryusuke Konishi | 1e2b68b | 2010-03-23 01:15:31 +0900 | [diff] [blame] | 1752 | int update_sr = false; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1753 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1754 | list_for_each_entry(segbuf, &sci->sc_write_logs, sb_list) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1755 | struct buffer_head *bh; |
| 1756 | |
| 1757 | list_for_each_entry(bh, &segbuf->sb_segsum_buffers, |
| 1758 | b_assoc_buffers) { |
| 1759 | set_buffer_uptodate(bh); |
| 1760 | clear_buffer_dirty(bh); |
| 1761 | if (bh->b_page != bd_page) { |
| 1762 | if (bd_page) |
| 1763 | end_page_writeback(bd_page); |
| 1764 | bd_page = bh->b_page; |
| 1765 | } |
| 1766 | } |
| 1767 | /* |
| 1768 | * We assume that the buffers which belong to the same page |
| 1769 | * continue over the buffer list. |
| 1770 | * Under this assumption, the last BHs of pages is |
| 1771 | * identifiable by the discontinuity of bh->b_page |
| 1772 | * (page != fs_page). |
| 1773 | * |
| 1774 | * For B-tree node blocks, however, this assumption is not |
| 1775 | * guaranteed. The cleanup code of B-tree node pages needs |
| 1776 | * special care. |
| 1777 | */ |
| 1778 | list_for_each_entry(bh, &segbuf->sb_payload_buffers, |
| 1779 | b_assoc_buffers) { |
| 1780 | set_buffer_uptodate(bh); |
| 1781 | clear_buffer_dirty(bh); |
Ryusuke Konishi | 27e6c7a | 2010-12-26 16:28:28 +0900 | [diff] [blame] | 1782 | clear_buffer_delay(bh); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1783 | clear_buffer_nilfs_volatile(bh); |
Ryusuke Konishi | b1f6a4f | 2010-08-31 11:40:34 +0900 | [diff] [blame] | 1784 | clear_buffer_nilfs_redirected(bh); |
Ryusuke Konishi | 1e2b68b | 2010-03-23 01:15:31 +0900 | [diff] [blame] | 1785 | if (bh == segbuf->sb_super_root) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1786 | if (bh->b_page != bd_page) { |
| 1787 | end_page_writeback(bd_page); |
| 1788 | bd_page = bh->b_page; |
| 1789 | } |
Ryusuke Konishi | 1e2b68b | 2010-03-23 01:15:31 +0900 | [diff] [blame] | 1790 | update_sr = true; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1791 | break; |
| 1792 | } |
| 1793 | if (bh->b_page != fs_page) { |
| 1794 | nilfs_end_page_io(fs_page, 0); |
| 1795 | fs_page = bh->b_page; |
| 1796 | } |
| 1797 | } |
| 1798 | |
Ryusuke Konishi | 4762077 | 2010-05-23 21:48:36 +0900 | [diff] [blame] | 1799 | if (!nilfs_segbuf_simplex(segbuf)) { |
| 1800 | if (segbuf->sb_sum.flags & NILFS_SS_LOGBGN) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1801 | set_bit(NILFS_SC_UNCLOSED, &sci->sc_flags); |
| 1802 | sci->sc_lseg_stime = jiffies; |
| 1803 | } |
Ryusuke Konishi | 4762077 | 2010-05-23 21:48:36 +0900 | [diff] [blame] | 1804 | if (segbuf->sb_sum.flags & NILFS_SS_LOGEND) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1805 | clear_bit(NILFS_SC_UNCLOSED, &sci->sc_flags); |
| 1806 | } |
| 1807 | } |
| 1808 | /* |
| 1809 | * Since pages may continue over multiple segment buffers, |
| 1810 | * end of the last page must be checked outside of the loop. |
| 1811 | */ |
| 1812 | if (bd_page) |
| 1813 | end_page_writeback(bd_page); |
| 1814 | |
| 1815 | nilfs_end_page_io(fs_page, 0); |
| 1816 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1817 | nilfs_drop_collected_inodes(&sci->sc_dirty_files); |
| 1818 | |
Ryusuke Konishi | c1c1d7092 | 2010-08-29 12:44:56 +0900 | [diff] [blame] | 1819 | if (nilfs_doing_gc()) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1820 | nilfs_drop_collected_inodes(&sci->sc_gc_inodes); |
Ryusuke Konishi | c1c1d7092 | 2010-08-29 12:44:56 +0900 | [diff] [blame] | 1821 | else |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1822 | nilfs->ns_nongc_ctime = sci->sc_seg_ctime; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1823 | |
| 1824 | sci->sc_nblk_inc += sci->sc_nblk_this_inc; |
| 1825 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1826 | segbuf = NILFS_LAST_SEGBUF(&sci->sc_write_logs); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1827 | nilfs_set_next_segment(nilfs, segbuf); |
| 1828 | |
| 1829 | if (update_sr) { |
| 1830 | nilfs_set_last_segment(nilfs, segbuf->sb_pseg_start, |
Ryusuke Konishi | e339ad3 | 2009-04-06 19:01:59 -0700 | [diff] [blame] | 1831 | segbuf->sb_sum.seg_seq, nilfs->ns_cno++); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1832 | |
Ryusuke Konishi | c96fa46 | 2009-04-06 19:01:57 -0700 | [diff] [blame] | 1833 | clear_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1834 | clear_bit(NILFS_SC_DIRTY, &sci->sc_flags); |
| 1835 | set_bit(NILFS_SC_SUPER_ROOT, &sci->sc_flags); |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1836 | nilfs_segctor_clear_metadata_dirty(sci); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1837 | } else |
| 1838 | clear_bit(NILFS_SC_SUPER_ROOT, &sci->sc_flags); |
| 1839 | } |
| 1840 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1841 | static int nilfs_segctor_wait(struct nilfs_sc_info *sci) |
| 1842 | { |
| 1843 | int ret; |
| 1844 | |
| 1845 | ret = nilfs_wait_on_logs(&sci->sc_write_logs); |
| 1846 | if (!ret) { |
| 1847 | nilfs_segctor_complete_write(sci); |
| 1848 | nilfs_destroy_logs(&sci->sc_write_logs); |
| 1849 | } |
| 1850 | return ret; |
| 1851 | } |
| 1852 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 1853 | static int nilfs_segctor_collect_dirty_files(struct nilfs_sc_info *sci, |
| 1854 | struct the_nilfs *nilfs) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1855 | { |
| 1856 | struct nilfs_inode_info *ii, *n; |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 1857 | struct inode *ifile = sci->sc_root->ifile; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1858 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 1859 | spin_lock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1860 | retry: |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 1861 | list_for_each_entry_safe(ii, n, &nilfs->ns_dirty_files, i_dirty) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1862 | if (!ii->i_bh) { |
| 1863 | struct buffer_head *ibh; |
| 1864 | int err; |
| 1865 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 1866 | spin_unlock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1867 | err = nilfs_ifile_get_inode_block( |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 1868 | ifile, ii->vfs_inode.i_ino, &ibh); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1869 | if (unlikely(err)) { |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 1870 | nilfs_warning(sci->sc_super, __func__, |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1871 | "failed to get inode block.\n"); |
| 1872 | return err; |
| 1873 | } |
| 1874 | nilfs_mdt_mark_buffer_dirty(ibh); |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 1875 | nilfs_mdt_mark_dirty(ifile); |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 1876 | spin_lock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1877 | if (likely(!ii->i_bh)) |
| 1878 | ii->i_bh = ibh; |
| 1879 | else |
| 1880 | brelse(ibh); |
| 1881 | goto retry; |
| 1882 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1883 | |
| 1884 | clear_bit(NILFS_I_QUEUED, &ii->i_state); |
| 1885 | set_bit(NILFS_I_BUSY, &ii->i_state); |
Nicolas Kaiser | eaae0f3 | 2011-03-19 16:45:30 +0100 | [diff] [blame] | 1886 | list_move_tail(&ii->i_dirty, &sci->sc_dirty_files); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1887 | } |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 1888 | spin_unlock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1889 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1890 | return 0; |
| 1891 | } |
| 1892 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 1893 | static void nilfs_segctor_drop_written_files(struct nilfs_sc_info *sci, |
| 1894 | struct the_nilfs *nilfs) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1895 | { |
| 1896 | struct nilfs_transaction_info *ti = current->journal_info; |
| 1897 | struct nilfs_inode_info *ii, *n; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1898 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 1899 | spin_lock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1900 | list_for_each_entry_safe(ii, n, &sci->sc_dirty_files, i_dirty) { |
| 1901 | if (!test_and_clear_bit(NILFS_I_UPDATED, &ii->i_state) || |
Ryusuke Konishi | 6c43f41 | 2010-08-20 20:10:38 +0900 | [diff] [blame] | 1902 | test_bit(NILFS_I_DIRTY, &ii->i_state)) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1903 | continue; |
Ryusuke Konishi | 6c43f41 | 2010-08-20 20:10:38 +0900 | [diff] [blame] | 1904 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1905 | clear_bit(NILFS_I_BUSY, &ii->i_state); |
| 1906 | brelse(ii->i_bh); |
| 1907 | ii->i_bh = NULL; |
Nicolas Kaiser | eaae0f3 | 2011-03-19 16:45:30 +0100 | [diff] [blame] | 1908 | list_move_tail(&ii->i_dirty, &ti->ti_garbage); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1909 | } |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 1910 | spin_unlock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1911 | } |
| 1912 | |
| 1913 | /* |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1914 | * Main procedure of segment constructor |
| 1915 | */ |
| 1916 | static int nilfs_segctor_do_construct(struct nilfs_sc_info *sci, int mode) |
| 1917 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 1918 | struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
Ryusuke Konishi | 1e2b68b | 2010-03-23 01:15:31 +0900 | [diff] [blame] | 1919 | int err; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1920 | |
| 1921 | sci->sc_stage.scnt = NILFS_ST_INIT; |
Ryusuke Konishi | 6c43f41 | 2010-08-20 20:10:38 +0900 | [diff] [blame] | 1922 | sci->sc_cno = nilfs->ns_cno; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1923 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 1924 | err = nilfs_segctor_collect_dirty_files(sci, nilfs); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1925 | if (unlikely(err)) |
| 1926 | goto out; |
| 1927 | |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 1928 | if (nilfs_test_metadata_dirty(nilfs, sci->sc_root)) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1929 | set_bit(NILFS_SC_DIRTY, &sci->sc_flags); |
| 1930 | |
| 1931 | if (nilfs_segctor_clean(sci)) |
| 1932 | goto out; |
| 1933 | |
| 1934 | do { |
| 1935 | sci->sc_stage.flags &= ~NILFS_CF_HISTORY_MASK; |
| 1936 | |
| 1937 | err = nilfs_segctor_begin_construction(sci, nilfs); |
| 1938 | if (unlikely(err)) |
| 1939 | goto out; |
| 1940 | |
| 1941 | /* Update time stamp */ |
| 1942 | sci->sc_seg_ctime = get_seconds(); |
| 1943 | |
| 1944 | err = nilfs_segctor_collect(sci, nilfs, mode); |
| 1945 | if (unlikely(err)) |
| 1946 | goto failed; |
| 1947 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1948 | /* Avoid empty segment */ |
| 1949 | if (sci->sc_stage.scnt == NILFS_ST_DONE && |
Ryusuke Konishi | 4762077 | 2010-05-23 21:48:36 +0900 | [diff] [blame] | 1950 | nilfs_segbuf_empty(sci->sc_curseg)) { |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1951 | nilfs_segctor_abort_construction(sci, nilfs, 1); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1952 | goto out; |
| 1953 | } |
| 1954 | |
| 1955 | err = nilfs_segctor_assign(sci, mode); |
| 1956 | if (unlikely(err)) |
| 1957 | goto failed; |
| 1958 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1959 | if (sci->sc_stage.flags & NILFS_CF_IFILE_STARTED) |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 1960 | nilfs_segctor_fill_in_file_bmap(sci); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1961 | |
Ryusuke Konishi | 1e2b68b | 2010-03-23 01:15:31 +0900 | [diff] [blame] | 1962 | if (mode == SC_LSEG_SR && |
| 1963 | sci->sc_stage.scnt >= NILFS_ST_CPFILE) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1964 | err = nilfs_segctor_fill_in_checkpoint(sci); |
| 1965 | if (unlikely(err)) |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1966 | goto failed_to_write; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1967 | |
| 1968 | nilfs_segctor_fill_in_super_root(sci, nilfs); |
| 1969 | } |
| 1970 | nilfs_segctor_update_segusage(sci, nilfs->ns_sufile); |
| 1971 | |
| 1972 | /* Write partial segments */ |
Ryusuke Konishi | 1cb2d38 | 2011-04-04 12:53:28 +0900 | [diff] [blame] | 1973 | nilfs_segctor_prepare_write(sci); |
Ryusuke Konishi | aaed1d5 | 2010-03-23 01:50:38 +0900 | [diff] [blame] | 1974 | |
| 1975 | nilfs_add_checksums_on_logs(&sci->sc_segbufs, |
| 1976 | nilfs->ns_crc_seed); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1977 | |
Ryusuke Konishi | 9c965ba | 2009-11-29 01:17:31 +0900 | [diff] [blame] | 1978 | err = nilfs_segctor_write(sci, nilfs); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1979 | if (unlikely(err)) |
| 1980 | goto failed_to_write; |
| 1981 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1982 | if (sci->sc_stage.scnt == NILFS_ST_DONE || |
| 1983 | nilfs->ns_blocksize_bits != PAGE_CACHE_SHIFT) { |
| 1984 | /* |
| 1985 | * At this point, we avoid double buffering |
| 1986 | * for blocksize < pagesize because page dirty |
| 1987 | * flag is turned off during write and dirty |
| 1988 | * buffers are not properly collected for |
| 1989 | * pages crossing over segments. |
| 1990 | */ |
| 1991 | err = nilfs_segctor_wait(sci); |
| 1992 | if (err) |
| 1993 | goto failed_to_write; |
| 1994 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1995 | } while (sci->sc_stage.scnt != NILFS_ST_DONE); |
| 1996 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1997 | out: |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 1998 | nilfs_segctor_drop_written_files(sci, nilfs); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1999 | return err; |
| 2000 | |
| 2001 | failed_to_write: |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2002 | if (sci->sc_stage.flags & NILFS_CF_IFILE_STARTED) |
| 2003 | nilfs_redirty_inodes(&sci->sc_dirty_files); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2004 | |
| 2005 | failed: |
| 2006 | if (nilfs_doing_gc()) |
| 2007 | nilfs_redirty_inodes(&sci->sc_gc_inodes); |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 2008 | nilfs_segctor_abort_construction(sci, nilfs, err); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2009 | goto out; |
| 2010 | } |
| 2011 | |
| 2012 | /** |
Ryusuke Konishi | 9ccf56c | 2010-03-14 03:01:03 +0900 | [diff] [blame] | 2013 | * nilfs_segctor_start_timer - set timer of background write |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2014 | * @sci: nilfs_sc_info |
| 2015 | * |
| 2016 | * If the timer has already been set, it ignores the new request. |
| 2017 | * This function MUST be called within a section locking the segment |
| 2018 | * semaphore. |
| 2019 | */ |
| 2020 | static void nilfs_segctor_start_timer(struct nilfs_sc_info *sci) |
| 2021 | { |
| 2022 | spin_lock(&sci->sc_state_lock); |
Li Hong | fdce895 | 2010-04-10 23:25:39 +0800 | [diff] [blame] | 2023 | if (!(sci->sc_state & NILFS_SEGCTOR_COMMIT)) { |
| 2024 | sci->sc_timer.expires = jiffies + sci->sc_interval; |
| 2025 | add_timer(&sci->sc_timer); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2026 | sci->sc_state |= NILFS_SEGCTOR_COMMIT; |
| 2027 | } |
| 2028 | spin_unlock(&sci->sc_state_lock); |
| 2029 | } |
| 2030 | |
| 2031 | static void nilfs_segctor_do_flush(struct nilfs_sc_info *sci, int bn) |
| 2032 | { |
| 2033 | spin_lock(&sci->sc_state_lock); |
| 2034 | if (!(sci->sc_flush_request & (1 << bn))) { |
| 2035 | unsigned long prev_req = sci->sc_flush_request; |
| 2036 | |
| 2037 | sci->sc_flush_request |= (1 << bn); |
| 2038 | if (!prev_req) |
| 2039 | wake_up(&sci->sc_wait_daemon); |
| 2040 | } |
| 2041 | spin_unlock(&sci->sc_state_lock); |
| 2042 | } |
| 2043 | |
| 2044 | /** |
| 2045 | * nilfs_flush_segment - trigger a segment construction for resource control |
| 2046 | * @sb: super block |
| 2047 | * @ino: inode number of the file to be flushed out. |
| 2048 | */ |
| 2049 | void nilfs_flush_segment(struct super_block *sb, ino_t ino) |
| 2050 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2051 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2052 | struct nilfs_sc_info *sci = nilfs->ns_writer; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2053 | |
| 2054 | if (!sci || nilfs_doing_construction()) |
| 2055 | return; |
| 2056 | nilfs_segctor_do_flush(sci, NILFS_MDT_INODE(sb, ino) ? ino : 0); |
| 2057 | /* assign bit 0 to data files */ |
| 2058 | } |
| 2059 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2060 | struct nilfs_segctor_wait_request { |
| 2061 | wait_queue_t wq; |
| 2062 | __u32 seq; |
| 2063 | int err; |
| 2064 | atomic_t done; |
| 2065 | }; |
| 2066 | |
| 2067 | static int nilfs_segctor_sync(struct nilfs_sc_info *sci) |
| 2068 | { |
| 2069 | struct nilfs_segctor_wait_request wait_req; |
| 2070 | int err = 0; |
| 2071 | |
| 2072 | spin_lock(&sci->sc_state_lock); |
| 2073 | init_wait(&wait_req.wq); |
| 2074 | wait_req.err = 0; |
| 2075 | atomic_set(&wait_req.done, 0); |
| 2076 | wait_req.seq = ++sci->sc_seq_request; |
| 2077 | spin_unlock(&sci->sc_state_lock); |
| 2078 | |
| 2079 | init_waitqueue_entry(&wait_req.wq, current); |
| 2080 | add_wait_queue(&sci->sc_wait_request, &wait_req.wq); |
| 2081 | set_current_state(TASK_INTERRUPTIBLE); |
| 2082 | wake_up(&sci->sc_wait_daemon); |
| 2083 | |
| 2084 | for (;;) { |
| 2085 | if (atomic_read(&wait_req.done)) { |
| 2086 | err = wait_req.err; |
| 2087 | break; |
| 2088 | } |
| 2089 | if (!signal_pending(current)) { |
| 2090 | schedule(); |
| 2091 | continue; |
| 2092 | } |
| 2093 | err = -ERESTARTSYS; |
| 2094 | break; |
| 2095 | } |
| 2096 | finish_wait(&sci->sc_wait_request, &wait_req.wq); |
| 2097 | return err; |
| 2098 | } |
| 2099 | |
| 2100 | static void nilfs_segctor_wakeup(struct nilfs_sc_info *sci, int err) |
| 2101 | { |
| 2102 | struct nilfs_segctor_wait_request *wrq, *n; |
| 2103 | unsigned long flags; |
| 2104 | |
| 2105 | spin_lock_irqsave(&sci->sc_wait_request.lock, flags); |
| 2106 | list_for_each_entry_safe(wrq, n, &sci->sc_wait_request.task_list, |
| 2107 | wq.task_list) { |
| 2108 | if (!atomic_read(&wrq->done) && |
| 2109 | nilfs_cnt32_ge(sci->sc_seq_done, wrq->seq)) { |
| 2110 | wrq->err = err; |
| 2111 | atomic_set(&wrq->done, 1); |
| 2112 | } |
| 2113 | if (atomic_read(&wrq->done)) { |
| 2114 | wrq->wq.func(&wrq->wq, |
| 2115 | TASK_UNINTERRUPTIBLE | TASK_INTERRUPTIBLE, |
| 2116 | 0, NULL); |
| 2117 | } |
| 2118 | } |
| 2119 | spin_unlock_irqrestore(&sci->sc_wait_request.lock, flags); |
| 2120 | } |
| 2121 | |
| 2122 | /** |
| 2123 | * nilfs_construct_segment - construct a logical segment |
| 2124 | * @sb: super block |
| 2125 | * |
| 2126 | * Return Value: On success, 0 is retured. On errors, one of the following |
| 2127 | * negative error code is returned. |
| 2128 | * |
| 2129 | * %-EROFS - Read only filesystem. |
| 2130 | * |
| 2131 | * %-EIO - I/O error |
| 2132 | * |
| 2133 | * %-ENOSPC - No space left on device (only in a panic state). |
| 2134 | * |
| 2135 | * %-ERESTARTSYS - Interrupted. |
| 2136 | * |
| 2137 | * %-ENOMEM - Insufficient memory available. |
| 2138 | */ |
| 2139 | int nilfs_construct_segment(struct super_block *sb) |
| 2140 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2141 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2142 | struct nilfs_sc_info *sci = nilfs->ns_writer; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2143 | struct nilfs_transaction_info *ti; |
| 2144 | int err; |
| 2145 | |
| 2146 | if (!sci) |
| 2147 | return -EROFS; |
| 2148 | |
| 2149 | /* A call inside transactions causes a deadlock. */ |
| 2150 | BUG_ON((ti = current->journal_info) && ti->ti_magic == NILFS_TI_MAGIC); |
| 2151 | |
| 2152 | err = nilfs_segctor_sync(sci); |
| 2153 | return err; |
| 2154 | } |
| 2155 | |
| 2156 | /** |
| 2157 | * nilfs_construct_dsync_segment - construct a data-only logical segment |
| 2158 | * @sb: super block |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 2159 | * @inode: inode whose data blocks should be written out |
| 2160 | * @start: start byte offset |
| 2161 | * @end: end byte offset (inclusive) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2162 | * |
| 2163 | * Return Value: On success, 0 is retured. On errors, one of the following |
| 2164 | * negative error code is returned. |
| 2165 | * |
| 2166 | * %-EROFS - Read only filesystem. |
| 2167 | * |
| 2168 | * %-EIO - I/O error |
| 2169 | * |
| 2170 | * %-ENOSPC - No space left on device (only in a panic state). |
| 2171 | * |
| 2172 | * %-ERESTARTSYS - Interrupted. |
| 2173 | * |
| 2174 | * %-ENOMEM - Insufficient memory available. |
| 2175 | */ |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 2176 | int nilfs_construct_dsync_segment(struct super_block *sb, struct inode *inode, |
| 2177 | loff_t start, loff_t end) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2178 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2179 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2180 | struct nilfs_sc_info *sci = nilfs->ns_writer; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2181 | struct nilfs_inode_info *ii; |
| 2182 | struct nilfs_transaction_info ti; |
| 2183 | int err = 0; |
| 2184 | |
| 2185 | if (!sci) |
| 2186 | return -EROFS; |
| 2187 | |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2188 | nilfs_transaction_lock(sb, &ti, 0); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2189 | |
| 2190 | ii = NILFS_I(inode); |
| 2191 | if (test_bit(NILFS_I_INODE_DIRTY, &ii->i_state) || |
Ryusuke Konishi | 3b2ce58 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2192 | nilfs_test_opt(nilfs, STRICT_ORDER) || |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2193 | test_bit(NILFS_SC_UNCLOSED, &sci->sc_flags) || |
Ryusuke Konishi | 3b2ce58 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2194 | nilfs_discontinued(nilfs)) { |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2195 | nilfs_transaction_unlock(sb); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2196 | err = nilfs_segctor_sync(sci); |
| 2197 | return err; |
| 2198 | } |
| 2199 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2200 | spin_lock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2201 | if (!test_bit(NILFS_I_QUEUED, &ii->i_state) && |
| 2202 | !test_bit(NILFS_I_BUSY, &ii->i_state)) { |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2203 | spin_unlock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2204 | nilfs_transaction_unlock(sb); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2205 | return 0; |
| 2206 | } |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2207 | spin_unlock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 2208 | sci->sc_dsync_inode = ii; |
| 2209 | sci->sc_dsync_start = start; |
| 2210 | sci->sc_dsync_end = end; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2211 | |
| 2212 | err = nilfs_segctor_do_construct(sci, SC_LSEG_DSYNC); |
| 2213 | |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2214 | nilfs_transaction_unlock(sb); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2215 | return err; |
| 2216 | } |
| 2217 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2218 | #define FLUSH_FILE_BIT (0x1) /* data file only */ |
| 2219 | #define FLUSH_DAT_BIT (1 << NILFS_DAT_INO) /* DAT only */ |
| 2220 | |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2221 | /** |
| 2222 | * nilfs_segctor_accept - record accepted sequence count of log-write requests |
| 2223 | * @sci: segment constructor object |
| 2224 | */ |
| 2225 | static void nilfs_segctor_accept(struct nilfs_sc_info *sci) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2226 | { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2227 | spin_lock(&sci->sc_state_lock); |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2228 | sci->sc_seq_accepted = sci->sc_seq_request; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2229 | spin_unlock(&sci->sc_state_lock); |
Li Hong | fdce895 | 2010-04-10 23:25:39 +0800 | [diff] [blame] | 2230 | del_timer_sync(&sci->sc_timer); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2231 | } |
| 2232 | |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2233 | /** |
| 2234 | * nilfs_segctor_notify - notify the result of request to caller threads |
| 2235 | * @sci: segment constructor object |
| 2236 | * @mode: mode of log forming |
| 2237 | * @err: error code to be notified |
| 2238 | */ |
| 2239 | static void nilfs_segctor_notify(struct nilfs_sc_info *sci, int mode, int err) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2240 | { |
| 2241 | /* Clear requests (even when the construction failed) */ |
| 2242 | spin_lock(&sci->sc_state_lock); |
| 2243 | |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2244 | if (mode == SC_LSEG_SR) { |
Ryusuke Konishi | aeda7f6 | 2009-11-02 15:08:13 +0900 | [diff] [blame] | 2245 | sci->sc_state &= ~NILFS_SEGCTOR_COMMIT; |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2246 | sci->sc_seq_done = sci->sc_seq_accepted; |
| 2247 | nilfs_segctor_wakeup(sci, err); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2248 | sci->sc_flush_request = 0; |
Ryusuke Konishi | aeda7f6 | 2009-11-02 15:08:13 +0900 | [diff] [blame] | 2249 | } else { |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2250 | if (mode == SC_FLUSH_FILE) |
Ryusuke Konishi | aeda7f6 | 2009-11-02 15:08:13 +0900 | [diff] [blame] | 2251 | sci->sc_flush_request &= ~FLUSH_FILE_BIT; |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2252 | else if (mode == SC_FLUSH_DAT) |
Ryusuke Konishi | aeda7f6 | 2009-11-02 15:08:13 +0900 | [diff] [blame] | 2253 | sci->sc_flush_request &= ~FLUSH_DAT_BIT; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2254 | |
Ryusuke Konishi | aeda7f6 | 2009-11-02 15:08:13 +0900 | [diff] [blame] | 2255 | /* re-enable timer if checkpoint creation was not done */ |
Li Hong | fdce895 | 2010-04-10 23:25:39 +0800 | [diff] [blame] | 2256 | if ((sci->sc_state & NILFS_SEGCTOR_COMMIT) && |
| 2257 | time_before(jiffies, sci->sc_timer.expires)) |
| 2258 | add_timer(&sci->sc_timer); |
Ryusuke Konishi | aeda7f6 | 2009-11-02 15:08:13 +0900 | [diff] [blame] | 2259 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2260 | spin_unlock(&sci->sc_state_lock); |
| 2261 | } |
| 2262 | |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2263 | /** |
| 2264 | * nilfs_segctor_construct - form logs and write them to disk |
| 2265 | * @sci: segment constructor object |
| 2266 | * @mode: mode of log forming |
| 2267 | */ |
| 2268 | static int nilfs_segctor_construct(struct nilfs_sc_info *sci, int mode) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2269 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2270 | struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
Jiro SEKIBA | d26493b | 2010-06-28 17:49:32 +0900 | [diff] [blame] | 2271 | struct nilfs_super_block **sbp; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2272 | int err = 0; |
| 2273 | |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2274 | nilfs_segctor_accept(sci); |
| 2275 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2276 | if (nilfs_discontinued(nilfs)) |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2277 | mode = SC_LSEG_SR; |
| 2278 | if (!nilfs_segctor_confirm(sci)) |
| 2279 | err = nilfs_segctor_do_construct(sci, mode); |
| 2280 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2281 | if (likely(!err)) { |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2282 | if (mode != SC_FLUSH_DAT) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2283 | atomic_set(&nilfs->ns_ndirtyblks, 0); |
| 2284 | if (test_bit(NILFS_SC_SUPER_ROOT, &sci->sc_flags) && |
| 2285 | nilfs_discontinued(nilfs)) { |
| 2286 | down_write(&nilfs->ns_sem); |
Jiro SEKIBA | d26493b | 2010-06-28 17:49:32 +0900 | [diff] [blame] | 2287 | err = -EIO; |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2288 | sbp = nilfs_prepare_super(sci->sc_super, |
Jiro SEKIBA | b2ac86e | 2010-06-28 17:49:33 +0900 | [diff] [blame] | 2289 | nilfs_sb_will_flip(nilfs)); |
| 2290 | if (likely(sbp)) { |
| 2291 | nilfs_set_log_cursor(sbp[0], nilfs); |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2292 | err = nilfs_commit_super(sci->sc_super, |
| 2293 | NILFS_SB_COMMIT); |
Jiro SEKIBA | b2ac86e | 2010-06-28 17:49:33 +0900 | [diff] [blame] | 2294 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2295 | up_write(&nilfs->ns_sem); |
| 2296 | } |
| 2297 | } |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2298 | |
| 2299 | nilfs_segctor_notify(sci, mode, err); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2300 | return err; |
| 2301 | } |
| 2302 | |
| 2303 | static void nilfs_construction_timeout(unsigned long data) |
| 2304 | { |
| 2305 | struct task_struct *p = (struct task_struct *)data; |
| 2306 | wake_up_process(p); |
| 2307 | } |
| 2308 | |
| 2309 | static void |
| 2310 | nilfs_remove_written_gcinodes(struct the_nilfs *nilfs, struct list_head *head) |
| 2311 | { |
| 2312 | struct nilfs_inode_info *ii, *n; |
| 2313 | |
| 2314 | list_for_each_entry_safe(ii, n, head, i_dirty) { |
| 2315 | if (!test_bit(NILFS_I_UPDATED, &ii->i_state)) |
| 2316 | continue; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2317 | list_del_init(&ii->i_dirty); |
Ryusuke Konishi | 263d90c | 2010-08-20 19:06:11 +0900 | [diff] [blame] | 2318 | iput(&ii->vfs_inode); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2319 | } |
| 2320 | } |
| 2321 | |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 2322 | int nilfs_clean_segments(struct super_block *sb, struct nilfs_argv *argv, |
| 2323 | void **kbufs) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2324 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2325 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2326 | struct nilfs_sc_info *sci = nilfs->ns_writer; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2327 | struct nilfs_transaction_info ti; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2328 | int err; |
| 2329 | |
| 2330 | if (unlikely(!sci)) |
| 2331 | return -EROFS; |
| 2332 | |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2333 | nilfs_transaction_lock(sb, &ti, 1); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2334 | |
Ryusuke Konishi | c1c1d7092 | 2010-08-29 12:44:56 +0900 | [diff] [blame] | 2335 | err = nilfs_mdt_save_to_shadow_map(nilfs->ns_dat); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2336 | if (unlikely(err)) |
| 2337 | goto out_unlock; |
Ryusuke Konishi | 071cb4b | 2009-05-16 23:44:55 +0900 | [diff] [blame] | 2338 | |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 2339 | err = nilfs_ioctl_prepare_clean_segments(nilfs, argv, kbufs); |
Ryusuke Konishi | c1c1d7092 | 2010-08-29 12:44:56 +0900 | [diff] [blame] | 2340 | if (unlikely(err)) { |
| 2341 | nilfs_mdt_restore_from_shadow_map(nilfs->ns_dat); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2342 | goto out_unlock; |
Ryusuke Konishi | c1c1d7092 | 2010-08-29 12:44:56 +0900 | [diff] [blame] | 2343 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2344 | |
Ryusuke Konishi | 071cb4b | 2009-05-16 23:44:55 +0900 | [diff] [blame] | 2345 | sci->sc_freesegs = kbufs[4]; |
| 2346 | sci->sc_nfreesegs = argv[4].v_nmembs; |
Ryusuke Konishi | 0935db7 | 2009-11-29 02:39:11 +0900 | [diff] [blame] | 2347 | list_splice_tail_init(&nilfs->ns_gc_inodes, &sci->sc_gc_inodes); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2348 | |
| 2349 | for (;;) { |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2350 | err = nilfs_segctor_construct(sci, SC_LSEG_SR); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2351 | nilfs_remove_written_gcinodes(nilfs, &sci->sc_gc_inodes); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2352 | |
| 2353 | if (likely(!err)) |
| 2354 | break; |
| 2355 | |
| 2356 | nilfs_warning(sb, __func__, |
| 2357 | "segment construction failed. (err=%d)", err); |
| 2358 | set_current_state(TASK_INTERRUPTIBLE); |
| 2359 | schedule_timeout(sci->sc_interval); |
| 2360 | } |
Ryusuke Konishi | 3b2ce58 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2361 | if (nilfs_test_opt(nilfs, DISCARD)) { |
Jiro SEKIBA | e902ec9 | 2010-01-30 18:06:35 +0900 | [diff] [blame] | 2362 | int ret = nilfs_discard_segments(nilfs, sci->sc_freesegs, |
| 2363 | sci->sc_nfreesegs); |
| 2364 | if (ret) { |
| 2365 | printk(KERN_WARNING |
| 2366 | "NILFS warning: error %d on discard request, " |
| 2367 | "turning discards off for the device\n", ret); |
Ryusuke Konishi | 3b2ce58 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2368 | nilfs_clear_opt(nilfs, DISCARD); |
Jiro SEKIBA | e902ec9 | 2010-01-30 18:06:35 +0900 | [diff] [blame] | 2369 | } |
| 2370 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2371 | |
| 2372 | out_unlock: |
Ryusuke Konishi | 071cb4b | 2009-05-16 23:44:55 +0900 | [diff] [blame] | 2373 | sci->sc_freesegs = NULL; |
| 2374 | sci->sc_nfreesegs = 0; |
Ryusuke Konishi | c1c1d7092 | 2010-08-29 12:44:56 +0900 | [diff] [blame] | 2375 | nilfs_mdt_clear_shadow_map(nilfs->ns_dat); |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2376 | nilfs_transaction_unlock(sb); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2377 | return err; |
| 2378 | } |
| 2379 | |
| 2380 | static void nilfs_segctor_thread_construct(struct nilfs_sc_info *sci, int mode) |
| 2381 | { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2382 | struct nilfs_transaction_info ti; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2383 | |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2384 | nilfs_transaction_lock(sci->sc_super, &ti, 0); |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2385 | nilfs_segctor_construct(sci, mode); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2386 | |
| 2387 | /* |
| 2388 | * Unclosed segment should be retried. We do this using sc_timer. |
| 2389 | * Timeout of sc_timer will invoke complete construction which leads |
| 2390 | * to close the current logical segment. |
| 2391 | */ |
| 2392 | if (test_bit(NILFS_SC_UNCLOSED, &sci->sc_flags)) |
| 2393 | nilfs_segctor_start_timer(sci); |
| 2394 | |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2395 | nilfs_transaction_unlock(sci->sc_super); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2396 | } |
| 2397 | |
| 2398 | static void nilfs_segctor_do_immediate_flush(struct nilfs_sc_info *sci) |
| 2399 | { |
| 2400 | int mode = 0; |
| 2401 | int err; |
| 2402 | |
| 2403 | spin_lock(&sci->sc_state_lock); |
| 2404 | mode = (sci->sc_flush_request & FLUSH_DAT_BIT) ? |
| 2405 | SC_FLUSH_DAT : SC_FLUSH_FILE; |
| 2406 | spin_unlock(&sci->sc_state_lock); |
| 2407 | |
| 2408 | if (mode) { |
| 2409 | err = nilfs_segctor_do_construct(sci, mode); |
| 2410 | |
| 2411 | spin_lock(&sci->sc_state_lock); |
| 2412 | sci->sc_flush_request &= (mode == SC_FLUSH_FILE) ? |
| 2413 | ~FLUSH_FILE_BIT : ~FLUSH_DAT_BIT; |
| 2414 | spin_unlock(&sci->sc_state_lock); |
| 2415 | } |
| 2416 | clear_bit(NILFS_SC_PRIOR_FLUSH, &sci->sc_flags); |
| 2417 | } |
| 2418 | |
| 2419 | static int nilfs_segctor_flush_mode(struct nilfs_sc_info *sci) |
| 2420 | { |
| 2421 | if (!test_bit(NILFS_SC_UNCLOSED, &sci->sc_flags) || |
| 2422 | time_before(jiffies, sci->sc_lseg_stime + sci->sc_mjcp_freq)) { |
| 2423 | if (!(sci->sc_flush_request & ~FLUSH_FILE_BIT)) |
| 2424 | return SC_FLUSH_FILE; |
| 2425 | else if (!(sci->sc_flush_request & ~FLUSH_DAT_BIT)) |
| 2426 | return SC_FLUSH_DAT; |
| 2427 | } |
| 2428 | return SC_LSEG_SR; |
| 2429 | } |
| 2430 | |
| 2431 | /** |
| 2432 | * nilfs_segctor_thread - main loop of the segment constructor thread. |
| 2433 | * @arg: pointer to a struct nilfs_sc_info. |
| 2434 | * |
| 2435 | * nilfs_segctor_thread() initializes a timer and serves as a daemon |
| 2436 | * to execute segment constructions. |
| 2437 | */ |
| 2438 | static int nilfs_segctor_thread(void *arg) |
| 2439 | { |
| 2440 | struct nilfs_sc_info *sci = (struct nilfs_sc_info *)arg; |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2441 | struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2442 | int timeout = 0; |
| 2443 | |
Li Hong | fdce895 | 2010-04-10 23:25:39 +0800 | [diff] [blame] | 2444 | sci->sc_timer.data = (unsigned long)current; |
| 2445 | sci->sc_timer.function = nilfs_construction_timeout; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2446 | |
| 2447 | /* start sync. */ |
| 2448 | sci->sc_task = current; |
| 2449 | wake_up(&sci->sc_wait_task); /* for nilfs_segctor_start_thread() */ |
| 2450 | printk(KERN_INFO |
| 2451 | "segctord starting. Construction interval = %lu seconds, " |
| 2452 | "CP frequency < %lu seconds\n", |
| 2453 | sci->sc_interval / HZ, sci->sc_mjcp_freq / HZ); |
| 2454 | |
| 2455 | spin_lock(&sci->sc_state_lock); |
| 2456 | loop: |
| 2457 | for (;;) { |
| 2458 | int mode; |
| 2459 | |
| 2460 | if (sci->sc_state & NILFS_SEGCTOR_QUIT) |
| 2461 | goto end_thread; |
| 2462 | |
| 2463 | if (timeout || sci->sc_seq_request != sci->sc_seq_done) |
| 2464 | mode = SC_LSEG_SR; |
| 2465 | else if (!sci->sc_flush_request) |
| 2466 | break; |
| 2467 | else |
| 2468 | mode = nilfs_segctor_flush_mode(sci); |
| 2469 | |
| 2470 | spin_unlock(&sci->sc_state_lock); |
| 2471 | nilfs_segctor_thread_construct(sci, mode); |
| 2472 | spin_lock(&sci->sc_state_lock); |
| 2473 | timeout = 0; |
| 2474 | } |
| 2475 | |
| 2476 | |
| 2477 | if (freezing(current)) { |
| 2478 | spin_unlock(&sci->sc_state_lock); |
| 2479 | refrigerator(); |
| 2480 | spin_lock(&sci->sc_state_lock); |
| 2481 | } else { |
| 2482 | DEFINE_WAIT(wait); |
| 2483 | int should_sleep = 1; |
| 2484 | |
| 2485 | prepare_to_wait(&sci->sc_wait_daemon, &wait, |
| 2486 | TASK_INTERRUPTIBLE); |
| 2487 | |
| 2488 | if (sci->sc_seq_request != sci->sc_seq_done) |
| 2489 | should_sleep = 0; |
| 2490 | else if (sci->sc_flush_request) |
| 2491 | should_sleep = 0; |
| 2492 | else if (sci->sc_state & NILFS_SEGCTOR_COMMIT) |
| 2493 | should_sleep = time_before(jiffies, |
Li Hong | fdce895 | 2010-04-10 23:25:39 +0800 | [diff] [blame] | 2494 | sci->sc_timer.expires); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2495 | |
| 2496 | if (should_sleep) { |
| 2497 | spin_unlock(&sci->sc_state_lock); |
| 2498 | schedule(); |
| 2499 | spin_lock(&sci->sc_state_lock); |
| 2500 | } |
| 2501 | finish_wait(&sci->sc_wait_daemon, &wait); |
| 2502 | timeout = ((sci->sc_state & NILFS_SEGCTOR_COMMIT) && |
Li Hong | fdce895 | 2010-04-10 23:25:39 +0800 | [diff] [blame] | 2503 | time_after_eq(jiffies, sci->sc_timer.expires)); |
Ryusuke Konishi | e605f0a | 2009-12-09 00:57:52 +0900 | [diff] [blame] | 2504 | |
| 2505 | if (nilfs_sb_dirty(nilfs) && nilfs_sb_need_update(nilfs)) |
Jiro SEKIBA | 1dfa271 | 2009-07-23 01:33:49 +0900 | [diff] [blame] | 2506 | set_nilfs_discontinued(nilfs); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2507 | } |
| 2508 | goto loop; |
| 2509 | |
| 2510 | end_thread: |
| 2511 | spin_unlock(&sci->sc_state_lock); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2512 | |
| 2513 | /* end sync. */ |
| 2514 | sci->sc_task = NULL; |
| 2515 | wake_up(&sci->sc_wait_task); /* for nilfs_segctor_kill_thread() */ |
| 2516 | return 0; |
| 2517 | } |
| 2518 | |
| 2519 | static int nilfs_segctor_start_thread(struct nilfs_sc_info *sci) |
| 2520 | { |
| 2521 | struct task_struct *t; |
| 2522 | |
| 2523 | t = kthread_run(nilfs_segctor_thread, sci, "segctord"); |
| 2524 | if (IS_ERR(t)) { |
| 2525 | int err = PTR_ERR(t); |
| 2526 | |
| 2527 | printk(KERN_ERR "NILFS: error %d creating segctord thread\n", |
| 2528 | err); |
| 2529 | return err; |
| 2530 | } |
| 2531 | wait_event(sci->sc_wait_task, sci->sc_task != NULL); |
| 2532 | return 0; |
| 2533 | } |
| 2534 | |
| 2535 | static void nilfs_segctor_kill_thread(struct nilfs_sc_info *sci) |
Jiro SEKIBA | 6b81e14 | 2010-10-14 13:52:00 +0900 | [diff] [blame] | 2536 | __acquires(&sci->sc_state_lock) |
| 2537 | __releases(&sci->sc_state_lock) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2538 | { |
| 2539 | sci->sc_state |= NILFS_SEGCTOR_QUIT; |
| 2540 | |
| 2541 | while (sci->sc_task) { |
| 2542 | wake_up(&sci->sc_wait_daemon); |
| 2543 | spin_unlock(&sci->sc_state_lock); |
| 2544 | wait_event(sci->sc_wait_task, sci->sc_task == NULL); |
| 2545 | spin_lock(&sci->sc_state_lock); |
| 2546 | } |
| 2547 | } |
| 2548 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2549 | /* |
| 2550 | * Setup & clean-up functions |
| 2551 | */ |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2552 | static struct nilfs_sc_info *nilfs_segctor_new(struct super_block *sb, |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 2553 | struct nilfs_root *root) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2554 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2555 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2556 | struct nilfs_sc_info *sci; |
| 2557 | |
| 2558 | sci = kzalloc(sizeof(*sci), GFP_KERNEL); |
| 2559 | if (!sci) |
| 2560 | return NULL; |
| 2561 | |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2562 | sci->sc_super = sb; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2563 | |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 2564 | nilfs_get_root(root); |
| 2565 | sci->sc_root = root; |
| 2566 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2567 | init_waitqueue_head(&sci->sc_wait_request); |
| 2568 | init_waitqueue_head(&sci->sc_wait_daemon); |
| 2569 | init_waitqueue_head(&sci->sc_wait_task); |
| 2570 | spin_lock_init(&sci->sc_state_lock); |
| 2571 | INIT_LIST_HEAD(&sci->sc_dirty_files); |
| 2572 | INIT_LIST_HEAD(&sci->sc_segbufs); |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 2573 | INIT_LIST_HEAD(&sci->sc_write_logs); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2574 | INIT_LIST_HEAD(&sci->sc_gc_inodes); |
Li Hong | fdce895 | 2010-04-10 23:25:39 +0800 | [diff] [blame] | 2575 | init_timer(&sci->sc_timer); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2576 | |
| 2577 | sci->sc_interval = HZ * NILFS_SC_DEFAULT_TIMEOUT; |
| 2578 | sci->sc_mjcp_freq = HZ * NILFS_SC_DEFAULT_SR_FREQ; |
| 2579 | sci->sc_watermark = NILFS_SC_DEFAULT_WATERMARK; |
| 2580 | |
Ryusuke Konishi | 574e6c3 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2581 | if (nilfs->ns_interval) |
| 2582 | sci->sc_interval = nilfs->ns_interval; |
| 2583 | if (nilfs->ns_watermark) |
| 2584 | sci->sc_watermark = nilfs->ns_watermark; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2585 | return sci; |
| 2586 | } |
| 2587 | |
| 2588 | static void nilfs_segctor_write_out(struct nilfs_sc_info *sci) |
| 2589 | { |
| 2590 | int ret, retrycount = NILFS_SC_CLEANUP_RETRY; |
| 2591 | |
| 2592 | /* The segctord thread was stopped and its timer was removed. |
| 2593 | But some tasks remain. */ |
| 2594 | do { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2595 | struct nilfs_transaction_info ti; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2596 | |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2597 | nilfs_transaction_lock(sci->sc_super, &ti, 0); |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2598 | ret = nilfs_segctor_construct(sci, SC_LSEG_SR); |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2599 | nilfs_transaction_unlock(sci->sc_super); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2600 | |
| 2601 | } while (ret && retrycount-- > 0); |
| 2602 | } |
| 2603 | |
| 2604 | /** |
| 2605 | * nilfs_segctor_destroy - destroy the segment constructor. |
| 2606 | * @sci: nilfs_sc_info |
| 2607 | * |
| 2608 | * nilfs_segctor_destroy() kills the segctord thread and frees |
| 2609 | * the nilfs_sc_info struct. |
| 2610 | * Caller must hold the segment semaphore. |
| 2611 | */ |
| 2612 | static void nilfs_segctor_destroy(struct nilfs_sc_info *sci) |
| 2613 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2614 | struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2615 | int flag; |
| 2616 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2617 | up_write(&nilfs->ns_segctor_sem); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2618 | |
| 2619 | spin_lock(&sci->sc_state_lock); |
| 2620 | nilfs_segctor_kill_thread(sci); |
| 2621 | flag = ((sci->sc_state & NILFS_SEGCTOR_COMMIT) || sci->sc_flush_request |
| 2622 | || sci->sc_seq_request != sci->sc_seq_done); |
| 2623 | spin_unlock(&sci->sc_state_lock); |
| 2624 | |
Ryusuke Konishi | 3256a05 | 2010-01-31 12:39:50 +0900 | [diff] [blame] | 2625 | if (flag || !nilfs_segctor_confirm(sci)) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2626 | nilfs_segctor_write_out(sci); |
| 2627 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2628 | if (!list_empty(&sci->sc_dirty_files)) { |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2629 | nilfs_warning(sci->sc_super, __func__, |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2630 | "dirty file(s) after the final construction\n"); |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2631 | nilfs_dispose_list(nilfs, &sci->sc_dirty_files, 1); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2632 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2633 | |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 2634 | WARN_ON(!list_empty(&sci->sc_segbufs)); |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 2635 | WARN_ON(!list_empty(&sci->sc_write_logs)); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2636 | |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 2637 | nilfs_put_root(sci->sc_root); |
| 2638 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2639 | down_write(&nilfs->ns_segctor_sem); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2640 | |
Li Hong | fdce895 | 2010-04-10 23:25:39 +0800 | [diff] [blame] | 2641 | del_timer_sync(&sci->sc_timer); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2642 | kfree(sci); |
| 2643 | } |
| 2644 | |
| 2645 | /** |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2646 | * nilfs_attach_log_writer - attach log writer |
| 2647 | * @sb: super block instance |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 2648 | * @root: root object of the current filesystem tree |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2649 | * |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2650 | * This allocates a log writer object, initializes it, and starts the |
| 2651 | * log writer. |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2652 | * |
| 2653 | * Return Value: On success, 0 is returned. On error, one of the following |
| 2654 | * negative error code is returned. |
| 2655 | * |
| 2656 | * %-ENOMEM - Insufficient memory available. |
| 2657 | */ |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2658 | int nilfs_attach_log_writer(struct super_block *sb, struct nilfs_root *root) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2659 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2660 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2661 | int err; |
| 2662 | |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2663 | if (nilfs->ns_writer) { |
Ryusuke Konishi | fe5f171 | 2010-01-31 19:46:40 +0900 | [diff] [blame] | 2664 | /* |
| 2665 | * This happens if the filesystem was remounted |
| 2666 | * read/write after nilfs_error degenerated it into a |
| 2667 | * read-only mount. |
| 2668 | */ |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2669 | nilfs_detach_log_writer(sb); |
Ryusuke Konishi | fe5f171 | 2010-01-31 19:46:40 +0900 | [diff] [blame] | 2670 | } |
| 2671 | |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2672 | nilfs->ns_writer = nilfs_segctor_new(sb, root); |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2673 | if (!nilfs->ns_writer) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2674 | return -ENOMEM; |
| 2675 | |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2676 | err = nilfs_segctor_start_thread(nilfs->ns_writer); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2677 | if (err) { |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2678 | kfree(nilfs->ns_writer); |
| 2679 | nilfs->ns_writer = NULL; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2680 | } |
| 2681 | return err; |
| 2682 | } |
| 2683 | |
| 2684 | /** |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2685 | * nilfs_detach_log_writer - destroy log writer |
| 2686 | * @sb: super block instance |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2687 | * |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2688 | * This kills log writer daemon, frees the log writer object, and |
| 2689 | * destroys list of dirty files. |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2690 | */ |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2691 | void nilfs_detach_log_writer(struct super_block *sb) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2692 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2693 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2694 | LIST_HEAD(garbage_list); |
| 2695 | |
| 2696 | down_write(&nilfs->ns_segctor_sem); |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2697 | if (nilfs->ns_writer) { |
| 2698 | nilfs_segctor_destroy(nilfs->ns_writer); |
| 2699 | nilfs->ns_writer = NULL; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2700 | } |
| 2701 | |
| 2702 | /* Force to free the list of dirty files */ |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2703 | spin_lock(&nilfs->ns_inode_lock); |
| 2704 | if (!list_empty(&nilfs->ns_dirty_files)) { |
| 2705 | list_splice_init(&nilfs->ns_dirty_files, &garbage_list); |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2706 | nilfs_warning(sb, __func__, |
| 2707 | "Hit dirty file after stopped log writer\n"); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2708 | } |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2709 | spin_unlock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2710 | up_write(&nilfs->ns_segctor_sem); |
| 2711 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2712 | nilfs_dispose_list(nilfs, &garbage_list, 1); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2713 | } |