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> |
Ryusuke Konishi | ead8ecf | 2015-04-16 12:46:28 -0700 | [diff] [blame] | 27 | #include <linux/bitops.h> |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 28 | #include <linux/bio.h> |
| 29 | #include <linux/completion.h> |
| 30 | #include <linux/blkdev.h> |
| 31 | #include <linux/backing-dev.h> |
| 32 | #include <linux/freezer.h> |
| 33 | #include <linux/kthread.h> |
| 34 | #include <linux/crc32.h> |
| 35 | #include <linux/pagevec.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 36 | #include <linux/slab.h> |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 37 | #include "nilfs.h" |
| 38 | #include "btnode.h" |
| 39 | #include "page.h" |
| 40 | #include "segment.h" |
| 41 | #include "sufile.h" |
| 42 | #include "cpfile.h" |
| 43 | #include "ifile.h" |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 44 | #include "segbuf.h" |
| 45 | |
| 46 | |
| 47 | /* |
| 48 | * Segment constructor |
| 49 | */ |
| 50 | #define SC_N_INODEVEC 16 /* Size of locally allocated inode vector */ |
| 51 | |
| 52 | #define SC_MAX_SEGDELTA 64 /* Upper limit of the number of segments |
| 53 | appended in collection retry loop */ |
| 54 | |
| 55 | /* Construction mode */ |
| 56 | enum { |
| 57 | SC_LSEG_SR = 1, /* Make a logical segment having a super root */ |
| 58 | SC_LSEG_DSYNC, /* Flush data blocks of a given file and make |
| 59 | a logical segment without a super root */ |
| 60 | SC_FLUSH_FILE, /* Flush data files, leads to segment writes without |
| 61 | creating a checkpoint */ |
| 62 | SC_FLUSH_DAT, /* Flush DAT file. This also creates segments without |
| 63 | a checkpoint */ |
| 64 | }; |
| 65 | |
| 66 | /* Stage numbers of dirty block collection */ |
| 67 | enum { |
| 68 | NILFS_ST_INIT = 0, |
| 69 | NILFS_ST_GC, /* Collecting dirty blocks for GC */ |
| 70 | NILFS_ST_FILE, |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 71 | NILFS_ST_IFILE, |
| 72 | NILFS_ST_CPFILE, |
| 73 | NILFS_ST_SUFILE, |
| 74 | NILFS_ST_DAT, |
| 75 | NILFS_ST_SR, /* Super root */ |
| 76 | NILFS_ST_DSYNC, /* Data sync blocks */ |
| 77 | NILFS_ST_DONE, |
| 78 | }; |
| 79 | |
Hitoshi Mitake | 5849770 | 2015-11-06 16:31:59 -0800 | [diff] [blame^] | 80 | #define CREATE_TRACE_POINTS |
| 81 | #include <trace/events/nilfs2.h> |
| 82 | |
| 83 | /* |
| 84 | * nilfs_sc_cstage_inc(), nilfs_sc_cstage_set(), nilfs_sc_cstage_get() are |
| 85 | * wrapper functions of stage count (nilfs_sc_info->sc_stage.scnt). Users of |
| 86 | * the variable must use them because transition of stage count must involve |
| 87 | * trace events (trace_nilfs2_collection_stage_transition). |
| 88 | * |
| 89 | * nilfs_sc_cstage_get() isn't required for the above purpose because it doesn't |
| 90 | * produce tracepoint events. It is provided just for making the intention |
| 91 | * clear. |
| 92 | */ |
| 93 | static inline void nilfs_sc_cstage_inc(struct nilfs_sc_info *sci) |
| 94 | { |
| 95 | sci->sc_stage.scnt++; |
| 96 | trace_nilfs2_collection_stage_transition(sci); |
| 97 | } |
| 98 | |
| 99 | static inline void nilfs_sc_cstage_set(struct nilfs_sc_info *sci, int next_scnt) |
| 100 | { |
| 101 | sci->sc_stage.scnt = next_scnt; |
| 102 | trace_nilfs2_collection_stage_transition(sci); |
| 103 | } |
| 104 | |
| 105 | static inline int nilfs_sc_cstage_get(struct nilfs_sc_info *sci) |
| 106 | { |
| 107 | return sci->sc_stage.scnt; |
| 108 | } |
| 109 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 110 | /* State flags of collection */ |
| 111 | #define NILFS_CF_NODE 0x0001 /* Collecting node blocks */ |
| 112 | #define NILFS_CF_IFILE_STARTED 0x0002 /* IFILE stage has started */ |
Ryusuke Konishi | 071cb4b | 2009-05-16 23:44:55 +0900 | [diff] [blame] | 113 | #define NILFS_CF_SUFREED 0x0004 /* segment usages has been freed */ |
| 114 | #define NILFS_CF_HISTORY_MASK (NILFS_CF_IFILE_STARTED | NILFS_CF_SUFREED) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 115 | |
| 116 | /* Operations depending on the construction mode and file type */ |
| 117 | struct nilfs_sc_operations { |
| 118 | int (*collect_data)(struct nilfs_sc_info *, struct buffer_head *, |
| 119 | struct inode *); |
| 120 | int (*collect_node)(struct nilfs_sc_info *, struct buffer_head *, |
| 121 | struct inode *); |
| 122 | int (*collect_bmap)(struct nilfs_sc_info *, struct buffer_head *, |
| 123 | struct inode *); |
| 124 | void (*write_data_binfo)(struct nilfs_sc_info *, |
| 125 | struct nilfs_segsum_pointer *, |
| 126 | union nilfs_binfo *); |
| 127 | void (*write_node_binfo)(struct nilfs_sc_info *, |
| 128 | struct nilfs_segsum_pointer *, |
| 129 | union nilfs_binfo *); |
| 130 | }; |
| 131 | |
| 132 | /* |
| 133 | * Other definitions |
| 134 | */ |
| 135 | static void nilfs_segctor_start_timer(struct nilfs_sc_info *); |
| 136 | static void nilfs_segctor_do_flush(struct nilfs_sc_info *, int); |
| 137 | static void nilfs_segctor_do_immediate_flush(struct nilfs_sc_info *); |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 138 | static void nilfs_dispose_list(struct the_nilfs *, struct list_head *, int); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 139 | |
| 140 | #define nilfs_cnt32_gt(a, b) \ |
| 141 | (typecheck(__u32, a) && typecheck(__u32, b) && \ |
| 142 | ((__s32)(b) - (__s32)(a) < 0)) |
| 143 | #define nilfs_cnt32_ge(a, b) \ |
| 144 | (typecheck(__u32, a) && typecheck(__u32, b) && \ |
| 145 | ((__s32)(a) - (__s32)(b) >= 0)) |
| 146 | #define nilfs_cnt32_lt(a, b) nilfs_cnt32_gt(b, a) |
| 147 | #define nilfs_cnt32_le(a, b) nilfs_cnt32_ge(b, a) |
| 148 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 149 | static int nilfs_prepare_segment_lock(struct nilfs_transaction_info *ti) |
| 150 | { |
| 151 | struct nilfs_transaction_info *cur_ti = current->journal_info; |
| 152 | void *save = NULL; |
| 153 | |
| 154 | if (cur_ti) { |
| 155 | if (cur_ti->ti_magic == NILFS_TI_MAGIC) |
| 156 | return ++cur_ti->ti_count; |
| 157 | else { |
| 158 | /* |
| 159 | * If journal_info field is occupied by other FS, |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 160 | * it is saved and will be restored on |
| 161 | * nilfs_transaction_commit(). |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 162 | */ |
| 163 | printk(KERN_WARNING |
| 164 | "NILFS warning: journal info from a different " |
| 165 | "FS\n"); |
| 166 | save = current->journal_info; |
| 167 | } |
| 168 | } |
| 169 | if (!ti) { |
| 170 | ti = kmem_cache_alloc(nilfs_transaction_cachep, GFP_NOFS); |
| 171 | if (!ti) |
| 172 | return -ENOMEM; |
| 173 | ti->ti_flags = NILFS_TI_DYNAMIC_ALLOC; |
| 174 | } else { |
| 175 | ti->ti_flags = 0; |
| 176 | } |
| 177 | ti->ti_count = 0; |
| 178 | ti->ti_save = save; |
| 179 | ti->ti_magic = NILFS_TI_MAGIC; |
| 180 | current->journal_info = ti; |
| 181 | return 0; |
| 182 | } |
| 183 | |
| 184 | /** |
| 185 | * nilfs_transaction_begin - start indivisible file operations. |
| 186 | * @sb: super block |
| 187 | * @ti: nilfs_transaction_info |
| 188 | * @vacancy_check: flags for vacancy rate checks |
| 189 | * |
| 190 | * nilfs_transaction_begin() acquires a reader/writer semaphore, called |
| 191 | * the segment semaphore, to make a segment construction and write tasks |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 192 | * exclusive. The function is used with nilfs_transaction_commit() in pairs. |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 193 | * The region enclosed by these two functions can be nested. To avoid a |
| 194 | * deadlock, the semaphore is only acquired or released in the outermost call. |
| 195 | * |
| 196 | * This function allocates a nilfs_transaction_info struct to keep context |
| 197 | * information on it. It is initialized and hooked onto the current task in |
| 198 | * 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] | 199 | * instead; otherwise a new struct is assigned from a slab. |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 200 | * |
| 201 | * When @vacancy_check flag is set, this function will check the amount of |
| 202 | * free space, and will wait for the GC to reclaim disk space if low capacity. |
| 203 | * |
| 204 | * Return Value: On success, 0 is returned. On error, one of the following |
| 205 | * negative error code is returned. |
| 206 | * |
| 207 | * %-ENOMEM - Insufficient memory available. |
| 208 | * |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 209 | * %-ENOSPC - No space left on device |
| 210 | */ |
| 211 | int nilfs_transaction_begin(struct super_block *sb, |
| 212 | struct nilfs_transaction_info *ti, |
| 213 | int vacancy_check) |
| 214 | { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 215 | struct the_nilfs *nilfs; |
| 216 | int ret = nilfs_prepare_segment_lock(ti); |
| 217 | |
| 218 | if (unlikely(ret < 0)) |
| 219 | return ret; |
| 220 | if (ret > 0) |
| 221 | return 0; |
| 222 | |
Jan Kara | 2c22b33 | 2012-06-12 16:20:44 +0200 | [diff] [blame] | 223 | sb_start_intwrite(sb); |
Ryusuke Konishi | 5beb6e0 | 2010-09-20 18:19:06 +0900 | [diff] [blame] | 224 | |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 225 | nilfs = sb->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 226 | down_read(&nilfs->ns_segctor_sem); |
| 227 | if (vacancy_check && nilfs_near_disk_full(nilfs)) { |
| 228 | up_read(&nilfs->ns_segctor_sem); |
| 229 | ret = -ENOSPC; |
| 230 | goto failed; |
| 231 | } |
| 232 | return 0; |
| 233 | |
| 234 | failed: |
| 235 | ti = current->journal_info; |
| 236 | current->journal_info = ti->ti_save; |
| 237 | if (ti->ti_flags & NILFS_TI_DYNAMIC_ALLOC) |
| 238 | kmem_cache_free(nilfs_transaction_cachep, ti); |
Jan Kara | 2c22b33 | 2012-06-12 16:20:44 +0200 | [diff] [blame] | 239 | sb_end_intwrite(sb); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 240 | return ret; |
| 241 | } |
| 242 | |
| 243 | /** |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 244 | * nilfs_transaction_commit - commit indivisible file operations. |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 245 | * @sb: super block |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 246 | * |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 247 | * nilfs_transaction_commit() releases the read semaphore which is |
| 248 | * acquired by nilfs_transaction_begin(). This is only performed |
| 249 | * in outermost call of this function. If a commit flag is set, |
| 250 | * nilfs_transaction_commit() sets a timer to start the segment |
| 251 | * constructor. If a sync flag is set, it starts construction |
| 252 | * directly. |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 253 | */ |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 254 | int nilfs_transaction_commit(struct super_block *sb) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 255 | { |
| 256 | struct nilfs_transaction_info *ti = current->journal_info; |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 257 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 258 | int err = 0; |
| 259 | |
| 260 | BUG_ON(ti == NULL || ti->ti_magic != NILFS_TI_MAGIC); |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 261 | ti->ti_flags |= NILFS_TI_COMMIT; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 262 | if (ti->ti_count > 0) { |
| 263 | ti->ti_count--; |
| 264 | return 0; |
| 265 | } |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 266 | if (nilfs->ns_writer) { |
| 267 | struct nilfs_sc_info *sci = nilfs->ns_writer; |
| 268 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 269 | if (ti->ti_flags & NILFS_TI_COMMIT) |
| 270 | nilfs_segctor_start_timer(sci); |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 271 | if (atomic_read(&nilfs->ns_ndirtyblks) > sci->sc_watermark) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 272 | nilfs_segctor_do_flush(sci, 0); |
| 273 | } |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 274 | up_read(&nilfs->ns_segctor_sem); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 275 | current->journal_info = ti->ti_save; |
| 276 | |
| 277 | if (ti->ti_flags & NILFS_TI_SYNC) |
| 278 | err = nilfs_construct_segment(sb); |
| 279 | if (ti->ti_flags & NILFS_TI_DYNAMIC_ALLOC) |
| 280 | kmem_cache_free(nilfs_transaction_cachep, ti); |
Jan Kara | 2c22b33 | 2012-06-12 16:20:44 +0200 | [diff] [blame] | 281 | sb_end_intwrite(sb); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 282 | return err; |
| 283 | } |
| 284 | |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 285 | void nilfs_transaction_abort(struct super_block *sb) |
| 286 | { |
| 287 | struct nilfs_transaction_info *ti = current->journal_info; |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 288 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 289 | |
| 290 | BUG_ON(ti == NULL || ti->ti_magic != NILFS_TI_MAGIC); |
| 291 | if (ti->ti_count > 0) { |
| 292 | ti->ti_count--; |
| 293 | return; |
| 294 | } |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 295 | up_read(&nilfs->ns_segctor_sem); |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 296 | |
| 297 | current->journal_info = ti->ti_save; |
| 298 | if (ti->ti_flags & NILFS_TI_DYNAMIC_ALLOC) |
| 299 | kmem_cache_free(nilfs_transaction_cachep, ti); |
Jan Kara | 2c22b33 | 2012-06-12 16:20:44 +0200 | [diff] [blame] | 300 | sb_end_intwrite(sb); |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 301 | } |
| 302 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 303 | void nilfs_relax_pressure_in_lock(struct super_block *sb) |
| 304 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 305 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 306 | struct nilfs_sc_info *sci = nilfs->ns_writer; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 307 | |
| 308 | if (!sci || !sci->sc_flush_request) |
| 309 | return; |
| 310 | |
| 311 | set_bit(NILFS_SC_PRIOR_FLUSH, &sci->sc_flags); |
| 312 | up_read(&nilfs->ns_segctor_sem); |
| 313 | |
| 314 | down_write(&nilfs->ns_segctor_sem); |
| 315 | if (sci->sc_flush_request && |
| 316 | test_bit(NILFS_SC_PRIOR_FLUSH, &sci->sc_flags)) { |
| 317 | struct nilfs_transaction_info *ti = current->journal_info; |
| 318 | |
| 319 | ti->ti_flags |= NILFS_TI_WRITER; |
| 320 | nilfs_segctor_do_immediate_flush(sci); |
| 321 | ti->ti_flags &= ~NILFS_TI_WRITER; |
| 322 | } |
| 323 | downgrade_write(&nilfs->ns_segctor_sem); |
| 324 | } |
| 325 | |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 326 | static void nilfs_transaction_lock(struct super_block *sb, |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 327 | struct nilfs_transaction_info *ti, |
| 328 | int gcflag) |
| 329 | { |
| 330 | struct nilfs_transaction_info *cur_ti = current->journal_info; |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 331 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 332 | struct nilfs_sc_info *sci = nilfs->ns_writer; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 333 | |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 334 | WARN_ON(cur_ti); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 335 | ti->ti_flags = NILFS_TI_WRITER; |
| 336 | ti->ti_count = 0; |
| 337 | ti->ti_save = cur_ti; |
| 338 | ti->ti_magic = NILFS_TI_MAGIC; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 339 | current->journal_info = ti; |
| 340 | |
| 341 | for (;;) { |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 342 | down_write(&nilfs->ns_segctor_sem); |
| 343 | if (!test_bit(NILFS_SC_PRIOR_FLUSH, &sci->sc_flags)) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 344 | break; |
| 345 | |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 346 | nilfs_segctor_do_immediate_flush(sci); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 347 | |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 348 | up_write(&nilfs->ns_segctor_sem); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 349 | yield(); |
| 350 | } |
| 351 | if (gcflag) |
| 352 | ti->ti_flags |= NILFS_TI_GC; |
| 353 | } |
| 354 | |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 355 | static void nilfs_transaction_unlock(struct super_block *sb) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 356 | { |
| 357 | struct nilfs_transaction_info *ti = current->journal_info; |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 358 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 359 | |
| 360 | BUG_ON(ti == NULL || ti->ti_magic != NILFS_TI_MAGIC); |
| 361 | BUG_ON(ti->ti_count > 0); |
| 362 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 363 | up_write(&nilfs->ns_segctor_sem); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 364 | current->journal_info = ti->ti_save; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 365 | } |
| 366 | |
| 367 | static void *nilfs_segctor_map_segsum_entry(struct nilfs_sc_info *sci, |
| 368 | struct nilfs_segsum_pointer *ssp, |
| 369 | unsigned bytes) |
| 370 | { |
| 371 | struct nilfs_segment_buffer *segbuf = sci->sc_curseg; |
| 372 | unsigned blocksize = sci->sc_super->s_blocksize; |
| 373 | void *p; |
| 374 | |
| 375 | if (unlikely(ssp->offset + bytes > blocksize)) { |
| 376 | ssp->offset = 0; |
| 377 | BUG_ON(NILFS_SEGBUF_BH_IS_LAST(ssp->bh, |
| 378 | &segbuf->sb_segsum_buffers)); |
| 379 | ssp->bh = NILFS_SEGBUF_NEXT_BH(ssp->bh); |
| 380 | } |
| 381 | p = ssp->bh->b_data + ssp->offset; |
| 382 | ssp->offset += bytes; |
| 383 | return p; |
| 384 | } |
| 385 | |
| 386 | /** |
| 387 | * nilfs_segctor_reset_segment_buffer - reset the current segment buffer |
| 388 | * @sci: nilfs_sc_info |
| 389 | */ |
| 390 | static int nilfs_segctor_reset_segment_buffer(struct nilfs_sc_info *sci) |
| 391 | { |
| 392 | struct nilfs_segment_buffer *segbuf = sci->sc_curseg; |
| 393 | struct buffer_head *sumbh; |
| 394 | unsigned sumbytes; |
| 395 | unsigned flags = 0; |
| 396 | int err; |
| 397 | |
| 398 | if (nilfs_doing_gc()) |
| 399 | flags = NILFS_SS_GC; |
Ryusuke Konishi | 6c43f41 | 2010-08-20 20:10:38 +0900 | [diff] [blame] | 400 | 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] | 401 | if (unlikely(err)) |
| 402 | return err; |
| 403 | |
| 404 | sumbh = NILFS_SEGBUF_FIRST_BH(&segbuf->sb_segsum_buffers); |
| 405 | sumbytes = segbuf->sb_sum.sumbytes; |
| 406 | sci->sc_finfo_ptr.bh = sumbh; sci->sc_finfo_ptr.offset = sumbytes; |
| 407 | sci->sc_binfo_ptr.bh = sumbh; sci->sc_binfo_ptr.offset = sumbytes; |
| 408 | sci->sc_blk_cnt = sci->sc_datablk_cnt = 0; |
| 409 | return 0; |
| 410 | } |
| 411 | |
| 412 | static int nilfs_segctor_feed_segment(struct nilfs_sc_info *sci) |
| 413 | { |
| 414 | sci->sc_nblk_this_inc += sci->sc_curseg->sb_sum.nblocks; |
| 415 | if (NILFS_SEGBUF_IS_LAST(sci->sc_curseg, &sci->sc_segbufs)) |
| 416 | return -E2BIG; /* The current segment is filled up |
| 417 | (internal code) */ |
| 418 | sci->sc_curseg = NILFS_NEXT_SEGBUF(sci->sc_curseg); |
| 419 | return nilfs_segctor_reset_segment_buffer(sci); |
| 420 | } |
| 421 | |
| 422 | static int nilfs_segctor_add_super_root(struct nilfs_sc_info *sci) |
| 423 | { |
| 424 | struct nilfs_segment_buffer *segbuf = sci->sc_curseg; |
| 425 | int err; |
| 426 | |
| 427 | if (segbuf->sb_sum.nblocks >= segbuf->sb_rest_blocks) { |
| 428 | err = nilfs_segctor_feed_segment(sci); |
| 429 | if (err) |
| 430 | return err; |
| 431 | segbuf = sci->sc_curseg; |
| 432 | } |
Ryusuke Konishi | 1e2b68b | 2010-03-23 01:15:31 +0900 | [diff] [blame] | 433 | err = nilfs_segbuf_extend_payload(segbuf, &segbuf->sb_super_root); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 434 | if (likely(!err)) |
| 435 | segbuf->sb_sum.flags |= NILFS_SS_SR; |
| 436 | return err; |
| 437 | } |
| 438 | |
| 439 | /* |
| 440 | * Functions for making segment summary and payloads |
| 441 | */ |
| 442 | static int nilfs_segctor_segsum_block_required( |
| 443 | struct nilfs_sc_info *sci, const struct nilfs_segsum_pointer *ssp, |
| 444 | unsigned binfo_size) |
| 445 | { |
| 446 | unsigned blocksize = sci->sc_super->s_blocksize; |
| 447 | /* Size of finfo and binfo is enough small against blocksize */ |
| 448 | |
| 449 | return ssp->offset + binfo_size + |
| 450 | (!sci->sc_blk_cnt ? sizeof(struct nilfs_finfo) : 0) > |
| 451 | blocksize; |
| 452 | } |
| 453 | |
| 454 | static void nilfs_segctor_begin_finfo(struct nilfs_sc_info *sci, |
| 455 | struct inode *inode) |
| 456 | { |
| 457 | sci->sc_curseg->sb_sum.nfinfo++; |
| 458 | sci->sc_binfo_ptr = sci->sc_finfo_ptr; |
| 459 | nilfs_segctor_map_segsum_entry( |
| 460 | sci, &sci->sc_binfo_ptr, sizeof(struct nilfs_finfo)); |
Ryusuke Konishi | c96fa46 | 2009-04-06 19:01:57 -0700 | [diff] [blame] | 461 | |
Ryusuke Konishi | 72746ac | 2011-02-28 13:41:11 +0900 | [diff] [blame] | 462 | if (NILFS_I(inode)->i_root && |
| 463 | !test_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags)) |
Ryusuke Konishi | c96fa46 | 2009-04-06 19:01:57 -0700 | [diff] [blame] | 464 | set_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 465 | /* skip finfo */ |
| 466 | } |
| 467 | |
| 468 | static void nilfs_segctor_end_finfo(struct nilfs_sc_info *sci, |
| 469 | struct inode *inode) |
| 470 | { |
| 471 | struct nilfs_finfo *finfo; |
| 472 | struct nilfs_inode_info *ii; |
| 473 | struct nilfs_segment_buffer *segbuf; |
Ryusuke Konishi | 6c43f41 | 2010-08-20 20:10:38 +0900 | [diff] [blame] | 474 | __u64 cno; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 475 | |
| 476 | if (sci->sc_blk_cnt == 0) |
| 477 | return; |
| 478 | |
| 479 | ii = NILFS_I(inode); |
Ryusuke Konishi | 6c43f41 | 2010-08-20 20:10:38 +0900 | [diff] [blame] | 480 | |
| 481 | if (test_bit(NILFS_I_GCINODE, &ii->i_state)) |
| 482 | cno = ii->i_cno; |
| 483 | else if (NILFS_ROOT_METADATA_FILE(inode->i_ino)) |
| 484 | cno = 0; |
| 485 | else |
| 486 | cno = sci->sc_cno; |
| 487 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 488 | finfo = nilfs_segctor_map_segsum_entry(sci, &sci->sc_finfo_ptr, |
| 489 | sizeof(*finfo)); |
| 490 | finfo->fi_ino = cpu_to_le64(inode->i_ino); |
| 491 | finfo->fi_nblocks = cpu_to_le32(sci->sc_blk_cnt); |
| 492 | finfo->fi_ndatablk = cpu_to_le32(sci->sc_datablk_cnt); |
Ryusuke Konishi | 6c43f41 | 2010-08-20 20:10:38 +0900 | [diff] [blame] | 493 | finfo->fi_cno = cpu_to_le64(cno); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 494 | |
| 495 | segbuf = sci->sc_curseg; |
| 496 | segbuf->sb_sum.sumbytes = sci->sc_binfo_ptr.offset + |
| 497 | sci->sc_super->s_blocksize * (segbuf->sb_sum.nsumblk - 1); |
| 498 | sci->sc_finfo_ptr = sci->sc_binfo_ptr; |
| 499 | sci->sc_blk_cnt = sci->sc_datablk_cnt = 0; |
| 500 | } |
| 501 | |
| 502 | static int nilfs_segctor_add_file_block(struct nilfs_sc_info *sci, |
| 503 | struct buffer_head *bh, |
| 504 | struct inode *inode, |
| 505 | unsigned binfo_size) |
| 506 | { |
| 507 | struct nilfs_segment_buffer *segbuf; |
| 508 | int required, err = 0; |
| 509 | |
| 510 | retry: |
| 511 | segbuf = sci->sc_curseg; |
| 512 | required = nilfs_segctor_segsum_block_required( |
| 513 | sci, &sci->sc_binfo_ptr, binfo_size); |
| 514 | if (segbuf->sb_sum.nblocks + required + 1 > segbuf->sb_rest_blocks) { |
| 515 | nilfs_segctor_end_finfo(sci, inode); |
| 516 | err = nilfs_segctor_feed_segment(sci); |
| 517 | if (err) |
| 518 | return err; |
| 519 | goto retry; |
| 520 | } |
| 521 | if (unlikely(required)) { |
| 522 | err = nilfs_segbuf_extend_segsum(segbuf); |
| 523 | if (unlikely(err)) |
| 524 | goto failed; |
| 525 | } |
| 526 | if (sci->sc_blk_cnt == 0) |
| 527 | nilfs_segctor_begin_finfo(sci, inode); |
| 528 | |
| 529 | nilfs_segctor_map_segsum_entry(sci, &sci->sc_binfo_ptr, binfo_size); |
| 530 | /* Substitution to vblocknr is delayed until update_blocknr() */ |
| 531 | nilfs_segbuf_add_file_buffer(segbuf, bh); |
| 532 | sci->sc_blk_cnt++; |
| 533 | failed: |
| 534 | return err; |
| 535 | } |
| 536 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 537 | /* |
| 538 | * Callback functions that enumerate, mark, and collect dirty blocks |
| 539 | */ |
| 540 | static int nilfs_collect_file_data(struct nilfs_sc_info *sci, |
| 541 | struct buffer_head *bh, struct inode *inode) |
| 542 | { |
| 543 | int err; |
| 544 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 545 | err = nilfs_bmap_propagate(NILFS_I(inode)->i_bmap, bh); |
Ryusuke Konishi | e828949 | 2010-11-19 15:26:20 +0900 | [diff] [blame] | 546 | if (err < 0) |
| 547 | return err; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 548 | |
| 549 | err = nilfs_segctor_add_file_block(sci, bh, inode, |
| 550 | sizeof(struct nilfs_binfo_v)); |
| 551 | if (!err) |
| 552 | sci->sc_datablk_cnt++; |
| 553 | return err; |
| 554 | } |
| 555 | |
| 556 | static int nilfs_collect_file_node(struct nilfs_sc_info *sci, |
| 557 | struct buffer_head *bh, |
| 558 | struct inode *inode) |
| 559 | { |
Ryusuke Konishi | e828949 | 2010-11-19 15:26:20 +0900 | [diff] [blame] | 560 | return nilfs_bmap_propagate(NILFS_I(inode)->i_bmap, bh); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 561 | } |
| 562 | |
| 563 | static int nilfs_collect_file_bmap(struct nilfs_sc_info *sci, |
| 564 | struct buffer_head *bh, |
| 565 | struct inode *inode) |
| 566 | { |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 567 | WARN_ON(!buffer_dirty(bh)); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 568 | return nilfs_segctor_add_file_block(sci, bh, inode, sizeof(__le64)); |
| 569 | } |
| 570 | |
| 571 | static void nilfs_write_file_data_binfo(struct nilfs_sc_info *sci, |
| 572 | struct nilfs_segsum_pointer *ssp, |
| 573 | union nilfs_binfo *binfo) |
| 574 | { |
| 575 | struct nilfs_binfo_v *binfo_v = nilfs_segctor_map_segsum_entry( |
| 576 | sci, ssp, sizeof(*binfo_v)); |
| 577 | *binfo_v = binfo->bi_v; |
| 578 | } |
| 579 | |
| 580 | static void nilfs_write_file_node_binfo(struct nilfs_sc_info *sci, |
| 581 | struct nilfs_segsum_pointer *ssp, |
| 582 | union nilfs_binfo *binfo) |
| 583 | { |
| 584 | __le64 *vblocknr = nilfs_segctor_map_segsum_entry( |
| 585 | sci, ssp, sizeof(*vblocknr)); |
| 586 | *vblocknr = binfo->bi_v.bi_vblocknr; |
| 587 | } |
| 588 | |
Ryusuke Konishi | 4e81950 | 2010-04-23 17:35:23 +0900 | [diff] [blame] | 589 | static struct nilfs_sc_operations nilfs_sc_file_ops = { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 590 | .collect_data = nilfs_collect_file_data, |
| 591 | .collect_node = nilfs_collect_file_node, |
| 592 | .collect_bmap = nilfs_collect_file_bmap, |
| 593 | .write_data_binfo = nilfs_write_file_data_binfo, |
| 594 | .write_node_binfo = nilfs_write_file_node_binfo, |
| 595 | }; |
| 596 | |
| 597 | static int nilfs_collect_dat_data(struct nilfs_sc_info *sci, |
| 598 | struct buffer_head *bh, struct inode *inode) |
| 599 | { |
| 600 | int err; |
| 601 | |
| 602 | err = nilfs_bmap_propagate(NILFS_I(inode)->i_bmap, bh); |
Ryusuke Konishi | e828949 | 2010-11-19 15:26:20 +0900 | [diff] [blame] | 603 | if (err < 0) |
| 604 | return err; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 605 | |
| 606 | err = nilfs_segctor_add_file_block(sci, bh, inode, sizeof(__le64)); |
| 607 | if (!err) |
| 608 | sci->sc_datablk_cnt++; |
| 609 | return err; |
| 610 | } |
| 611 | |
| 612 | static int nilfs_collect_dat_bmap(struct nilfs_sc_info *sci, |
| 613 | struct buffer_head *bh, struct inode *inode) |
| 614 | { |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 615 | WARN_ON(!buffer_dirty(bh)); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 616 | return nilfs_segctor_add_file_block(sci, bh, inode, |
| 617 | sizeof(struct nilfs_binfo_dat)); |
| 618 | } |
| 619 | |
| 620 | static void nilfs_write_dat_data_binfo(struct nilfs_sc_info *sci, |
| 621 | struct nilfs_segsum_pointer *ssp, |
| 622 | union nilfs_binfo *binfo) |
| 623 | { |
| 624 | __le64 *blkoff = nilfs_segctor_map_segsum_entry(sci, ssp, |
| 625 | sizeof(*blkoff)); |
| 626 | *blkoff = binfo->bi_dat.bi_blkoff; |
| 627 | } |
| 628 | |
| 629 | static void nilfs_write_dat_node_binfo(struct nilfs_sc_info *sci, |
| 630 | struct nilfs_segsum_pointer *ssp, |
| 631 | union nilfs_binfo *binfo) |
| 632 | { |
| 633 | struct nilfs_binfo_dat *binfo_dat = |
| 634 | nilfs_segctor_map_segsum_entry(sci, ssp, sizeof(*binfo_dat)); |
| 635 | *binfo_dat = binfo->bi_dat; |
| 636 | } |
| 637 | |
Ryusuke Konishi | 4e81950 | 2010-04-23 17:35:23 +0900 | [diff] [blame] | 638 | static struct nilfs_sc_operations nilfs_sc_dat_ops = { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 639 | .collect_data = nilfs_collect_dat_data, |
| 640 | .collect_node = nilfs_collect_file_node, |
| 641 | .collect_bmap = nilfs_collect_dat_bmap, |
| 642 | .write_data_binfo = nilfs_write_dat_data_binfo, |
| 643 | .write_node_binfo = nilfs_write_dat_node_binfo, |
| 644 | }; |
| 645 | |
Ryusuke Konishi | 4e81950 | 2010-04-23 17:35:23 +0900 | [diff] [blame] | 646 | static struct nilfs_sc_operations nilfs_sc_dsync_ops = { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 647 | .collect_data = nilfs_collect_file_data, |
| 648 | .collect_node = NULL, |
| 649 | .collect_bmap = NULL, |
| 650 | .write_data_binfo = nilfs_write_file_data_binfo, |
| 651 | .write_node_binfo = NULL, |
| 652 | }; |
| 653 | |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 654 | static size_t nilfs_lookup_dirty_data_buffers(struct inode *inode, |
| 655 | struct list_head *listp, |
| 656 | size_t nlimit, |
| 657 | loff_t start, loff_t end) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 658 | { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 659 | struct address_space *mapping = inode->i_mapping; |
| 660 | struct pagevec pvec; |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 661 | pgoff_t index = 0, last = ULONG_MAX; |
| 662 | size_t ndirties = 0; |
| 663 | int i; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 664 | |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 665 | if (unlikely(start != 0 || end != LLONG_MAX)) { |
| 666 | /* |
| 667 | * A valid range is given for sync-ing data pages. The |
| 668 | * range is rounded to per-page; extra dirty buffers |
| 669 | * may be included if blocksize < pagesize. |
| 670 | */ |
| 671 | index = start >> PAGE_SHIFT; |
| 672 | last = end >> PAGE_SHIFT; |
| 673 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 674 | pagevec_init(&pvec, 0); |
| 675 | repeat: |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 676 | if (unlikely(index > last) || |
| 677 | !pagevec_lookup_tag(&pvec, mapping, &index, PAGECACHE_TAG_DIRTY, |
| 678 | min_t(pgoff_t, last - index, |
| 679 | PAGEVEC_SIZE - 1) + 1)) |
| 680 | return ndirties; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 681 | |
| 682 | for (i = 0; i < pagevec_count(&pvec); i++) { |
| 683 | struct buffer_head *bh, *head; |
| 684 | struct page *page = pvec.pages[i]; |
| 685 | |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 686 | if (unlikely(page->index > last)) |
| 687 | break; |
| 688 | |
Ryusuke Konishi | aa405b1 | 2011-05-05 12:56:51 +0900 | [diff] [blame] | 689 | lock_page(page); |
| 690 | if (!page_has_buffers(page)) |
| 691 | create_empty_buffers(page, 1 << inode->i_blkbits, 0); |
| 692 | unlock_page(page); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 693 | |
| 694 | bh = head = page_buffers(page); |
| 695 | do { |
Vyacheslav Dubeyko | 7f42ec3 | 2013-09-30 13:45:12 -0700 | [diff] [blame] | 696 | if (!buffer_dirty(bh) || buffer_async_write(bh)) |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 697 | continue; |
| 698 | get_bh(bh); |
| 699 | list_add_tail(&bh->b_assoc_buffers, listp); |
| 700 | ndirties++; |
| 701 | if (unlikely(ndirties >= nlimit)) { |
| 702 | pagevec_release(&pvec); |
| 703 | cond_resched(); |
| 704 | return ndirties; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 705 | } |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 706 | } while (bh = bh->b_this_page, bh != head); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 707 | } |
| 708 | pagevec_release(&pvec); |
| 709 | cond_resched(); |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 710 | goto repeat; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 711 | } |
| 712 | |
| 713 | static void nilfs_lookup_dirty_node_buffers(struct inode *inode, |
| 714 | struct list_head *listp) |
| 715 | { |
| 716 | struct nilfs_inode_info *ii = NILFS_I(inode); |
| 717 | struct address_space *mapping = &ii->i_btnode_cache; |
| 718 | struct pagevec pvec; |
| 719 | struct buffer_head *bh, *head; |
| 720 | unsigned int i; |
| 721 | pgoff_t index = 0; |
| 722 | |
| 723 | pagevec_init(&pvec, 0); |
| 724 | |
| 725 | while (pagevec_lookup_tag(&pvec, mapping, &index, PAGECACHE_TAG_DIRTY, |
| 726 | PAGEVEC_SIZE)) { |
| 727 | for (i = 0; i < pagevec_count(&pvec); i++) { |
| 728 | bh = head = page_buffers(pvec.pages[i]); |
| 729 | do { |
Vyacheslav Dubeyko | 7f42ec3 | 2013-09-30 13:45:12 -0700 | [diff] [blame] | 730 | if (buffer_dirty(bh) && |
| 731 | !buffer_async_write(bh)) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 732 | get_bh(bh); |
| 733 | list_add_tail(&bh->b_assoc_buffers, |
| 734 | listp); |
| 735 | } |
| 736 | bh = bh->b_this_page; |
| 737 | } while (bh != head); |
| 738 | } |
| 739 | pagevec_release(&pvec); |
| 740 | cond_resched(); |
| 741 | } |
| 742 | } |
| 743 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 744 | static void nilfs_dispose_list(struct the_nilfs *nilfs, |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 745 | struct list_head *head, int force) |
| 746 | { |
| 747 | struct nilfs_inode_info *ii, *n; |
| 748 | struct nilfs_inode_info *ivec[SC_N_INODEVEC], **pii; |
| 749 | unsigned nv = 0; |
| 750 | |
| 751 | while (!list_empty(head)) { |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 752 | spin_lock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 753 | list_for_each_entry_safe(ii, n, head, i_dirty) { |
| 754 | list_del_init(&ii->i_dirty); |
| 755 | if (force) { |
| 756 | if (unlikely(ii->i_bh)) { |
| 757 | brelse(ii->i_bh); |
| 758 | ii->i_bh = NULL; |
| 759 | } |
| 760 | } else if (test_bit(NILFS_I_DIRTY, &ii->i_state)) { |
| 761 | set_bit(NILFS_I_QUEUED, &ii->i_state); |
| 762 | list_add_tail(&ii->i_dirty, |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 763 | &nilfs->ns_dirty_files); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 764 | continue; |
| 765 | } |
| 766 | ivec[nv++] = ii; |
| 767 | if (nv == SC_N_INODEVEC) |
| 768 | break; |
| 769 | } |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 770 | spin_unlock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 771 | |
| 772 | for (pii = ivec; nv > 0; pii++, nv--) |
| 773 | iput(&(*pii)->vfs_inode); |
| 774 | } |
| 775 | } |
| 776 | |
Ryusuke Konishi | 7ef3ff2 | 2015-02-05 12:25:20 -0800 | [diff] [blame] | 777 | static void nilfs_iput_work_func(struct work_struct *work) |
| 778 | { |
| 779 | struct nilfs_sc_info *sci = container_of(work, struct nilfs_sc_info, |
| 780 | sc_iput_work); |
| 781 | struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
| 782 | |
| 783 | nilfs_dispose_list(nilfs, &sci->sc_iput_queue, 0); |
| 784 | } |
| 785 | |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 786 | static int nilfs_test_metadata_dirty(struct the_nilfs *nilfs, |
| 787 | struct nilfs_root *root) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 788 | { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 789 | int ret = 0; |
| 790 | |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 791 | if (nilfs_mdt_fetch_dirty(root->ifile)) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 792 | ret++; |
| 793 | if (nilfs_mdt_fetch_dirty(nilfs->ns_cpfile)) |
| 794 | ret++; |
| 795 | if (nilfs_mdt_fetch_dirty(nilfs->ns_sufile)) |
| 796 | ret++; |
Ryusuke Konishi | 365e215 | 2010-12-27 00:07:30 +0900 | [diff] [blame] | 797 | if ((ret || nilfs_doing_gc()) && nilfs_mdt_fetch_dirty(nilfs->ns_dat)) |
| 798 | ret++; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 799 | return ret; |
| 800 | } |
| 801 | |
| 802 | static int nilfs_segctor_clean(struct nilfs_sc_info *sci) |
| 803 | { |
| 804 | return list_empty(&sci->sc_dirty_files) && |
| 805 | !test_bit(NILFS_SC_DIRTY, &sci->sc_flags) && |
Ryusuke Konishi | 071cb4b | 2009-05-16 23:44:55 +0900 | [diff] [blame] | 806 | sci->sc_nfreesegs == 0 && |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 807 | (!nilfs_doing_gc() || list_empty(&sci->sc_gc_inodes)); |
| 808 | } |
| 809 | |
| 810 | static int nilfs_segctor_confirm(struct nilfs_sc_info *sci) |
| 811 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 812 | struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 813 | int ret = 0; |
| 814 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 815 | if (nilfs_test_metadata_dirty(nilfs, sci->sc_root)) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 816 | set_bit(NILFS_SC_DIRTY, &sci->sc_flags); |
| 817 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 818 | spin_lock(&nilfs->ns_inode_lock); |
| 819 | if (list_empty(&nilfs->ns_dirty_files) && nilfs_segctor_clean(sci)) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 820 | ret++; |
| 821 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 822 | spin_unlock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 823 | return ret; |
| 824 | } |
| 825 | |
| 826 | static void nilfs_segctor_clear_metadata_dirty(struct nilfs_sc_info *sci) |
| 827 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 828 | struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 829 | |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 830 | nilfs_mdt_clear_dirty(sci->sc_root->ifile); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 831 | nilfs_mdt_clear_dirty(nilfs->ns_cpfile); |
| 832 | nilfs_mdt_clear_dirty(nilfs->ns_sufile); |
Ryusuke Konishi | 365e215 | 2010-12-27 00:07:30 +0900 | [diff] [blame] | 833 | nilfs_mdt_clear_dirty(nilfs->ns_dat); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 834 | } |
| 835 | |
| 836 | static int nilfs_segctor_create_checkpoint(struct nilfs_sc_info *sci) |
| 837 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 838 | struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 839 | struct buffer_head *bh_cp; |
| 840 | struct nilfs_checkpoint *raw_cp; |
| 841 | int err; |
| 842 | |
| 843 | /* XXX: this interface will be changed */ |
| 844 | err = nilfs_cpfile_get_checkpoint(nilfs->ns_cpfile, nilfs->ns_cno, 1, |
| 845 | &raw_cp, &bh_cp); |
| 846 | if (likely(!err)) { |
| 847 | /* The following code is duplicated with cpfile. But, it is |
| 848 | needed to collect the checkpoint even if it was not newly |
| 849 | created */ |
Ryusuke Konishi | 5fc7b14 | 2011-05-05 12:56:51 +0900 | [diff] [blame] | 850 | mark_buffer_dirty(bh_cp); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 851 | nilfs_mdt_mark_dirty(nilfs->ns_cpfile); |
| 852 | nilfs_cpfile_put_checkpoint( |
| 853 | nilfs->ns_cpfile, nilfs->ns_cno, bh_cp); |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 854 | } else |
| 855 | WARN_ON(err == -EINVAL || err == -ENOENT); |
| 856 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 857 | return err; |
| 858 | } |
| 859 | |
| 860 | static int nilfs_segctor_fill_in_checkpoint(struct nilfs_sc_info *sci) |
| 861 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 862 | struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 863 | struct buffer_head *bh_cp; |
| 864 | struct nilfs_checkpoint *raw_cp; |
| 865 | int err; |
| 866 | |
| 867 | err = nilfs_cpfile_get_checkpoint(nilfs->ns_cpfile, nilfs->ns_cno, 0, |
| 868 | &raw_cp, &bh_cp); |
| 869 | if (unlikely(err)) { |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 870 | WARN_ON(err == -EINVAL || err == -ENOENT); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 871 | goto failed_ibh; |
| 872 | } |
| 873 | raw_cp->cp_snapshot_list.ssl_next = 0; |
| 874 | raw_cp->cp_snapshot_list.ssl_prev = 0; |
| 875 | raw_cp->cp_inodes_count = |
Vyacheslav Dubeyko | e5f7f84 | 2013-07-03 15:08:06 -0700 | [diff] [blame] | 876 | cpu_to_le64(atomic64_read(&sci->sc_root->inodes_count)); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 877 | raw_cp->cp_blocks_count = |
Vyacheslav Dubeyko | e5f7f84 | 2013-07-03 15:08:06 -0700 | [diff] [blame] | 878 | cpu_to_le64(atomic64_read(&sci->sc_root->blocks_count)); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 879 | raw_cp->cp_nblk_inc = |
| 880 | cpu_to_le64(sci->sc_nblk_inc + sci->sc_nblk_this_inc); |
| 881 | raw_cp->cp_create = cpu_to_le64(sci->sc_seg_ctime); |
| 882 | raw_cp->cp_cno = cpu_to_le64(nilfs->ns_cno); |
Ryusuke Konishi | 458c5b0 | 2009-04-06 19:01:56 -0700 | [diff] [blame] | 883 | |
Ryusuke Konishi | c96fa46 | 2009-04-06 19:01:57 -0700 | [diff] [blame] | 884 | if (test_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags)) |
| 885 | nilfs_checkpoint_clear_minor(raw_cp); |
| 886 | else |
| 887 | nilfs_checkpoint_set_minor(raw_cp); |
| 888 | |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 889 | nilfs_write_inode_common(sci->sc_root->ifile, |
| 890 | &raw_cp->cp_ifile_inode, 1); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 891 | nilfs_cpfile_put_checkpoint(nilfs->ns_cpfile, nilfs->ns_cno, bh_cp); |
| 892 | return 0; |
| 893 | |
| 894 | failed_ibh: |
| 895 | return err; |
| 896 | } |
| 897 | |
| 898 | static void nilfs_fill_in_file_bmap(struct inode *ifile, |
| 899 | struct nilfs_inode_info *ii) |
| 900 | |
| 901 | { |
| 902 | struct buffer_head *ibh; |
| 903 | struct nilfs_inode *raw_inode; |
| 904 | |
| 905 | if (test_bit(NILFS_I_BMAP, &ii->i_state)) { |
| 906 | ibh = ii->i_bh; |
| 907 | BUG_ON(!ibh); |
| 908 | raw_inode = nilfs_ifile_map_inode(ifile, ii->vfs_inode.i_ino, |
| 909 | ibh); |
| 910 | nilfs_bmap_write(ii->i_bmap, raw_inode); |
| 911 | nilfs_ifile_unmap_inode(ifile, ii->vfs_inode.i_ino, ibh); |
| 912 | } |
| 913 | } |
| 914 | |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 915 | 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] | 916 | { |
| 917 | struct nilfs_inode_info *ii; |
| 918 | |
| 919 | list_for_each_entry(ii, &sci->sc_dirty_files, i_dirty) { |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 920 | nilfs_fill_in_file_bmap(sci->sc_root->ifile, ii); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 921 | set_bit(NILFS_I_COLLECTED, &ii->i_state); |
| 922 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 923 | } |
| 924 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 925 | static void nilfs_segctor_fill_in_super_root(struct nilfs_sc_info *sci, |
| 926 | struct the_nilfs *nilfs) |
| 927 | { |
Ryusuke Konishi | 1e2b68b | 2010-03-23 01:15:31 +0900 | [diff] [blame] | 928 | struct buffer_head *bh_sr; |
| 929 | struct nilfs_super_root *raw_sr; |
Ryusuke Konishi | 56eb553 | 2011-04-30 18:56:12 +0900 | [diff] [blame] | 930 | unsigned isz, srsz; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 931 | |
Ryusuke Konishi | 1e2b68b | 2010-03-23 01:15:31 +0900 | [diff] [blame] | 932 | bh_sr = NILFS_LAST_SEGBUF(&sci->sc_segbufs)->sb_super_root; |
| 933 | raw_sr = (struct nilfs_super_root *)bh_sr->b_data; |
Ryusuke Konishi | 56eb553 | 2011-04-30 18:56:12 +0900 | [diff] [blame] | 934 | isz = nilfs->ns_inode_size; |
| 935 | srsz = NILFS_SR_BYTES(isz); |
Ryusuke Konishi | 1e2b68b | 2010-03-23 01:15:31 +0900 | [diff] [blame] | 936 | |
Ryusuke Konishi | 56eb553 | 2011-04-30 18:56:12 +0900 | [diff] [blame] | 937 | raw_sr->sr_bytes = cpu_to_le16(srsz); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 938 | raw_sr->sr_nongc_ctime |
| 939 | = cpu_to_le64(nilfs_doing_gc() ? |
| 940 | nilfs->ns_nongc_ctime : sci->sc_seg_ctime); |
| 941 | raw_sr->sr_flags = 0; |
| 942 | |
Ryusuke Konishi | 365e215 | 2010-12-27 00:07:30 +0900 | [diff] [blame] | 943 | nilfs_write_inode_common(nilfs->ns_dat, (void *)raw_sr + |
Ryusuke Konishi | 3961f0e | 2009-11-13 01:55:02 +0900 | [diff] [blame] | 944 | NILFS_SR_DAT_OFFSET(isz), 1); |
| 945 | nilfs_write_inode_common(nilfs->ns_cpfile, (void *)raw_sr + |
| 946 | NILFS_SR_CPFILE_OFFSET(isz), 1); |
| 947 | nilfs_write_inode_common(nilfs->ns_sufile, (void *)raw_sr + |
| 948 | NILFS_SR_SUFILE_OFFSET(isz), 1); |
Ryusuke Konishi | 56eb553 | 2011-04-30 18:56:12 +0900 | [diff] [blame] | 949 | memset((void *)raw_sr + srsz, 0, nilfs->ns_blocksize - srsz); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 950 | } |
| 951 | |
| 952 | static void nilfs_redirty_inodes(struct list_head *head) |
| 953 | { |
| 954 | struct nilfs_inode_info *ii; |
| 955 | |
| 956 | list_for_each_entry(ii, head, i_dirty) { |
| 957 | if (test_bit(NILFS_I_COLLECTED, &ii->i_state)) |
| 958 | clear_bit(NILFS_I_COLLECTED, &ii->i_state); |
| 959 | } |
| 960 | } |
| 961 | |
| 962 | static void nilfs_drop_collected_inodes(struct list_head *head) |
| 963 | { |
| 964 | struct nilfs_inode_info *ii; |
| 965 | |
| 966 | list_for_each_entry(ii, head, i_dirty) { |
| 967 | if (!test_and_clear_bit(NILFS_I_COLLECTED, &ii->i_state)) |
| 968 | continue; |
| 969 | |
Andreas Rohner | b9f6614 | 2014-10-13 15:53:22 -0700 | [diff] [blame] | 970 | clear_bit(NILFS_I_INODE_SYNC, &ii->i_state); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 971 | set_bit(NILFS_I_UPDATED, &ii->i_state); |
| 972 | } |
| 973 | } |
| 974 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 975 | static int nilfs_segctor_apply_buffers(struct nilfs_sc_info *sci, |
| 976 | struct inode *inode, |
| 977 | struct list_head *listp, |
| 978 | int (*collect)(struct nilfs_sc_info *, |
| 979 | struct buffer_head *, |
| 980 | struct inode *)) |
| 981 | { |
| 982 | struct buffer_head *bh, *n; |
| 983 | int err = 0; |
| 984 | |
| 985 | if (collect) { |
| 986 | list_for_each_entry_safe(bh, n, listp, b_assoc_buffers) { |
| 987 | list_del_init(&bh->b_assoc_buffers); |
| 988 | err = collect(sci, bh, inode); |
| 989 | brelse(bh); |
| 990 | if (unlikely(err)) |
| 991 | goto dispose_buffers; |
| 992 | } |
| 993 | return 0; |
| 994 | } |
| 995 | |
| 996 | dispose_buffers: |
| 997 | while (!list_empty(listp)) { |
Ryusuke Konishi | 0cc128388 | 2011-05-05 12:56:51 +0900 | [diff] [blame] | 998 | bh = list_first_entry(listp, struct buffer_head, |
| 999 | b_assoc_buffers); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1000 | list_del_init(&bh->b_assoc_buffers); |
| 1001 | brelse(bh); |
| 1002 | } |
| 1003 | return err; |
| 1004 | } |
| 1005 | |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 1006 | static size_t nilfs_segctor_buffer_rest(struct nilfs_sc_info *sci) |
| 1007 | { |
| 1008 | /* Remaining number of blocks within segment buffer */ |
| 1009 | return sci->sc_segbuf_nblocks - |
| 1010 | (sci->sc_nblk_this_inc + sci->sc_curseg->sb_sum.nblocks); |
| 1011 | } |
| 1012 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1013 | static int nilfs_segctor_scan_file(struct nilfs_sc_info *sci, |
| 1014 | struct inode *inode, |
| 1015 | struct nilfs_sc_operations *sc_ops) |
| 1016 | { |
| 1017 | LIST_HEAD(data_buffers); |
| 1018 | LIST_HEAD(node_buffers); |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 1019 | int err; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1020 | |
| 1021 | if (!(sci->sc_stage.flags & NILFS_CF_NODE)) { |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 1022 | size_t n, rest = nilfs_segctor_buffer_rest(sci); |
| 1023 | |
| 1024 | n = nilfs_lookup_dirty_data_buffers( |
| 1025 | inode, &data_buffers, rest + 1, 0, LLONG_MAX); |
| 1026 | if (n > rest) { |
| 1027 | err = nilfs_segctor_apply_buffers( |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1028 | sci, inode, &data_buffers, |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 1029 | sc_ops->collect_data); |
| 1030 | BUG_ON(!err); /* always receive -E2BIG or true error */ |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1031 | goto break_or_fail; |
| 1032 | } |
| 1033 | } |
| 1034 | nilfs_lookup_dirty_node_buffers(inode, &node_buffers); |
| 1035 | |
| 1036 | if (!(sci->sc_stage.flags & NILFS_CF_NODE)) { |
| 1037 | err = nilfs_segctor_apply_buffers( |
| 1038 | sci, inode, &data_buffers, sc_ops->collect_data); |
| 1039 | if (unlikely(err)) { |
| 1040 | /* dispose node list */ |
| 1041 | nilfs_segctor_apply_buffers( |
| 1042 | sci, inode, &node_buffers, NULL); |
| 1043 | goto break_or_fail; |
| 1044 | } |
| 1045 | sci->sc_stage.flags |= NILFS_CF_NODE; |
| 1046 | } |
| 1047 | /* Collect node */ |
| 1048 | err = nilfs_segctor_apply_buffers( |
| 1049 | sci, inode, &node_buffers, sc_ops->collect_node); |
| 1050 | if (unlikely(err)) |
| 1051 | goto break_or_fail; |
| 1052 | |
| 1053 | nilfs_bmap_lookup_dirty_buffers(NILFS_I(inode)->i_bmap, &node_buffers); |
| 1054 | err = nilfs_segctor_apply_buffers( |
| 1055 | sci, inode, &node_buffers, sc_ops->collect_bmap); |
| 1056 | if (unlikely(err)) |
| 1057 | goto break_or_fail; |
| 1058 | |
| 1059 | nilfs_segctor_end_finfo(sci, inode); |
| 1060 | sci->sc_stage.flags &= ~NILFS_CF_NODE; |
| 1061 | |
| 1062 | break_or_fail: |
| 1063 | return err; |
| 1064 | } |
| 1065 | |
| 1066 | static int nilfs_segctor_scan_file_dsync(struct nilfs_sc_info *sci, |
| 1067 | struct inode *inode) |
| 1068 | { |
| 1069 | LIST_HEAD(data_buffers); |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 1070 | size_t n, rest = nilfs_segctor_buffer_rest(sci); |
| 1071 | int err; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1072 | |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 1073 | n = nilfs_lookup_dirty_data_buffers(inode, &data_buffers, rest + 1, |
| 1074 | sci->sc_dsync_start, |
| 1075 | sci->sc_dsync_end); |
| 1076 | |
| 1077 | err = nilfs_segctor_apply_buffers(sci, inode, &data_buffers, |
| 1078 | nilfs_collect_file_data); |
| 1079 | if (!err) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1080 | nilfs_segctor_end_finfo(sci, inode); |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 1081 | BUG_ON(n > rest); |
| 1082 | /* always receive -E2BIG or true error if n > rest */ |
| 1083 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1084 | return err; |
| 1085 | } |
| 1086 | |
| 1087 | static int nilfs_segctor_collect_blocks(struct nilfs_sc_info *sci, int mode) |
| 1088 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 1089 | struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1090 | struct list_head *head; |
| 1091 | struct nilfs_inode_info *ii; |
Ryusuke Konishi | 071cb4b | 2009-05-16 23:44:55 +0900 | [diff] [blame] | 1092 | size_t ndone; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1093 | int err = 0; |
| 1094 | |
Hitoshi Mitake | 5849770 | 2015-11-06 16:31:59 -0800 | [diff] [blame^] | 1095 | switch (nilfs_sc_cstage_get(sci)) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1096 | case NILFS_ST_INIT: |
| 1097 | /* Pre-processes */ |
| 1098 | sci->sc_stage.flags = 0; |
| 1099 | |
| 1100 | if (!test_bit(NILFS_SC_UNCLOSED, &sci->sc_flags)) { |
| 1101 | sci->sc_nblk_inc = 0; |
| 1102 | sci->sc_curseg->sb_sum.flags = NILFS_SS_LOGBGN; |
| 1103 | if (mode == SC_LSEG_DSYNC) { |
Hitoshi Mitake | 5849770 | 2015-11-06 16:31:59 -0800 | [diff] [blame^] | 1104 | nilfs_sc_cstage_set(sci, NILFS_ST_DSYNC); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1105 | goto dsync_mode; |
| 1106 | } |
| 1107 | } |
| 1108 | |
| 1109 | sci->sc_stage.dirty_file_ptr = NULL; |
| 1110 | sci->sc_stage.gc_inode_ptr = NULL; |
| 1111 | if (mode == SC_FLUSH_DAT) { |
Hitoshi Mitake | 5849770 | 2015-11-06 16:31:59 -0800 | [diff] [blame^] | 1112 | nilfs_sc_cstage_set(sci, NILFS_ST_DAT); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1113 | goto dat_stage; |
| 1114 | } |
Hitoshi Mitake | 5849770 | 2015-11-06 16:31:59 -0800 | [diff] [blame^] | 1115 | nilfs_sc_cstage_inc(sci); /* Fall through */ |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1116 | case NILFS_ST_GC: |
| 1117 | if (nilfs_doing_gc()) { |
| 1118 | head = &sci->sc_gc_inodes; |
| 1119 | ii = list_prepare_entry(sci->sc_stage.gc_inode_ptr, |
| 1120 | head, i_dirty); |
| 1121 | list_for_each_entry_continue(ii, head, i_dirty) { |
| 1122 | err = nilfs_segctor_scan_file( |
| 1123 | sci, &ii->vfs_inode, |
| 1124 | &nilfs_sc_file_ops); |
| 1125 | if (unlikely(err)) { |
| 1126 | sci->sc_stage.gc_inode_ptr = list_entry( |
| 1127 | ii->i_dirty.prev, |
| 1128 | struct nilfs_inode_info, |
| 1129 | i_dirty); |
| 1130 | goto break_or_fail; |
| 1131 | } |
| 1132 | set_bit(NILFS_I_COLLECTED, &ii->i_state); |
| 1133 | } |
| 1134 | sci->sc_stage.gc_inode_ptr = NULL; |
| 1135 | } |
Hitoshi Mitake | 5849770 | 2015-11-06 16:31:59 -0800 | [diff] [blame^] | 1136 | nilfs_sc_cstage_inc(sci); /* Fall through */ |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1137 | case NILFS_ST_FILE: |
| 1138 | head = &sci->sc_dirty_files; |
| 1139 | ii = list_prepare_entry(sci->sc_stage.dirty_file_ptr, head, |
| 1140 | i_dirty); |
| 1141 | list_for_each_entry_continue(ii, head, i_dirty) { |
| 1142 | clear_bit(NILFS_I_DIRTY, &ii->i_state); |
| 1143 | |
| 1144 | err = nilfs_segctor_scan_file(sci, &ii->vfs_inode, |
| 1145 | &nilfs_sc_file_ops); |
| 1146 | if (unlikely(err)) { |
| 1147 | sci->sc_stage.dirty_file_ptr = |
| 1148 | list_entry(ii->i_dirty.prev, |
| 1149 | struct nilfs_inode_info, |
| 1150 | i_dirty); |
| 1151 | goto break_or_fail; |
| 1152 | } |
| 1153 | /* sci->sc_stage.dirty_file_ptr = NILFS_I(inode); */ |
| 1154 | /* XXX: required ? */ |
| 1155 | } |
| 1156 | sci->sc_stage.dirty_file_ptr = NULL; |
| 1157 | if (mode == SC_FLUSH_FILE) { |
Hitoshi Mitake | 5849770 | 2015-11-06 16:31:59 -0800 | [diff] [blame^] | 1158 | nilfs_sc_cstage_set(sci, NILFS_ST_DONE); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1159 | return 0; |
| 1160 | } |
Hitoshi Mitake | 5849770 | 2015-11-06 16:31:59 -0800 | [diff] [blame^] | 1161 | nilfs_sc_cstage_inc(sci); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1162 | sci->sc_stage.flags |= NILFS_CF_IFILE_STARTED; |
| 1163 | /* Fall through */ |
| 1164 | case NILFS_ST_IFILE: |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 1165 | err = nilfs_segctor_scan_file(sci, sci->sc_root->ifile, |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1166 | &nilfs_sc_file_ops); |
| 1167 | if (unlikely(err)) |
| 1168 | break; |
Hitoshi Mitake | 5849770 | 2015-11-06 16:31:59 -0800 | [diff] [blame^] | 1169 | nilfs_sc_cstage_inc(sci); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1170 | /* Creating a checkpoint */ |
| 1171 | err = nilfs_segctor_create_checkpoint(sci); |
| 1172 | if (unlikely(err)) |
| 1173 | break; |
| 1174 | /* Fall through */ |
| 1175 | case NILFS_ST_CPFILE: |
| 1176 | err = nilfs_segctor_scan_file(sci, nilfs->ns_cpfile, |
| 1177 | &nilfs_sc_file_ops); |
| 1178 | if (unlikely(err)) |
| 1179 | break; |
Hitoshi Mitake | 5849770 | 2015-11-06 16:31:59 -0800 | [diff] [blame^] | 1180 | nilfs_sc_cstage_inc(sci); /* Fall through */ |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1181 | case NILFS_ST_SUFILE: |
Ryusuke Konishi | 071cb4b | 2009-05-16 23:44:55 +0900 | [diff] [blame] | 1182 | err = nilfs_sufile_freev(nilfs->ns_sufile, sci->sc_freesegs, |
| 1183 | sci->sc_nfreesegs, &ndone); |
| 1184 | if (unlikely(err)) { |
| 1185 | nilfs_sufile_cancel_freev(nilfs->ns_sufile, |
| 1186 | sci->sc_freesegs, ndone, |
| 1187 | NULL); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1188 | break; |
Ryusuke Konishi | 071cb4b | 2009-05-16 23:44:55 +0900 | [diff] [blame] | 1189 | } |
| 1190 | sci->sc_stage.flags |= NILFS_CF_SUFREED; |
| 1191 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1192 | err = nilfs_segctor_scan_file(sci, nilfs->ns_sufile, |
| 1193 | &nilfs_sc_file_ops); |
| 1194 | if (unlikely(err)) |
| 1195 | break; |
Hitoshi Mitake | 5849770 | 2015-11-06 16:31:59 -0800 | [diff] [blame^] | 1196 | nilfs_sc_cstage_inc(sci); /* Fall through */ |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1197 | case NILFS_ST_DAT: |
| 1198 | dat_stage: |
Ryusuke Konishi | 365e215 | 2010-12-27 00:07:30 +0900 | [diff] [blame] | 1199 | err = nilfs_segctor_scan_file(sci, nilfs->ns_dat, |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1200 | &nilfs_sc_dat_ops); |
| 1201 | if (unlikely(err)) |
| 1202 | break; |
| 1203 | if (mode == SC_FLUSH_DAT) { |
Hitoshi Mitake | 5849770 | 2015-11-06 16:31:59 -0800 | [diff] [blame^] | 1204 | nilfs_sc_cstage_set(sci, NILFS_ST_DONE); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1205 | return 0; |
| 1206 | } |
Hitoshi Mitake | 5849770 | 2015-11-06 16:31:59 -0800 | [diff] [blame^] | 1207 | nilfs_sc_cstage_inc(sci); /* Fall through */ |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1208 | case NILFS_ST_SR: |
| 1209 | if (mode == SC_LSEG_SR) { |
| 1210 | /* Appending a super root */ |
| 1211 | err = nilfs_segctor_add_super_root(sci); |
| 1212 | if (unlikely(err)) |
| 1213 | break; |
| 1214 | } |
| 1215 | /* End of a logical segment */ |
| 1216 | sci->sc_curseg->sb_sum.flags |= NILFS_SS_LOGEND; |
Hitoshi Mitake | 5849770 | 2015-11-06 16:31:59 -0800 | [diff] [blame^] | 1217 | nilfs_sc_cstage_set(sci, NILFS_ST_DONE); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1218 | return 0; |
| 1219 | case NILFS_ST_DSYNC: |
| 1220 | dsync_mode: |
| 1221 | sci->sc_curseg->sb_sum.flags |= NILFS_SS_SYNDT; |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 1222 | ii = sci->sc_dsync_inode; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1223 | if (!test_bit(NILFS_I_BUSY, &ii->i_state)) |
| 1224 | break; |
| 1225 | |
| 1226 | err = nilfs_segctor_scan_file_dsync(sci, &ii->vfs_inode); |
| 1227 | if (unlikely(err)) |
| 1228 | break; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1229 | sci->sc_curseg->sb_sum.flags |= NILFS_SS_LOGEND; |
Hitoshi Mitake | 5849770 | 2015-11-06 16:31:59 -0800 | [diff] [blame^] | 1230 | nilfs_sc_cstage_set(sci, NILFS_ST_DONE); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1231 | return 0; |
| 1232 | case NILFS_ST_DONE: |
| 1233 | return 0; |
| 1234 | default: |
| 1235 | BUG(); |
| 1236 | } |
| 1237 | |
| 1238 | break_or_fail: |
| 1239 | return err; |
| 1240 | } |
| 1241 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1242 | /** |
| 1243 | * nilfs_segctor_begin_construction - setup segment buffer to make a new log |
| 1244 | * @sci: nilfs_sc_info |
| 1245 | * @nilfs: nilfs object |
| 1246 | */ |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1247 | static int nilfs_segctor_begin_construction(struct nilfs_sc_info *sci, |
| 1248 | struct the_nilfs *nilfs) |
| 1249 | { |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1250 | struct nilfs_segment_buffer *segbuf, *prev; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1251 | __u64 nextnum; |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1252 | int err, alloc = 0; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1253 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1254 | segbuf = nilfs_segbuf_new(sci->sc_super); |
| 1255 | if (unlikely(!segbuf)) |
| 1256 | return -ENOMEM; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1257 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1258 | if (list_empty(&sci->sc_write_logs)) { |
| 1259 | nilfs_segbuf_map(segbuf, nilfs->ns_segnum, |
| 1260 | nilfs->ns_pseg_offset, nilfs); |
| 1261 | if (segbuf->sb_rest_blocks < NILFS_PSEG_MIN_BLOCKS) { |
| 1262 | nilfs_shift_to_next_segment(nilfs); |
| 1263 | nilfs_segbuf_map(segbuf, nilfs->ns_segnum, 0, nilfs); |
| 1264 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1265 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1266 | segbuf->sb_sum.seg_seq = nilfs->ns_seg_seq; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1267 | nextnum = nilfs->ns_nextnum; |
| 1268 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1269 | if (nilfs->ns_segnum == nilfs->ns_nextnum) |
| 1270 | /* Start from the head of a new full segment */ |
| 1271 | alloc++; |
| 1272 | } else { |
| 1273 | /* Continue logs */ |
| 1274 | prev = NILFS_LAST_SEGBUF(&sci->sc_write_logs); |
| 1275 | nilfs_segbuf_map_cont(segbuf, prev); |
| 1276 | segbuf->sb_sum.seg_seq = prev->sb_sum.seg_seq; |
| 1277 | nextnum = prev->sb_nextnum; |
| 1278 | |
| 1279 | if (segbuf->sb_rest_blocks < NILFS_PSEG_MIN_BLOCKS) { |
| 1280 | nilfs_segbuf_map(segbuf, prev->sb_nextnum, 0, nilfs); |
| 1281 | segbuf->sb_sum.seg_seq++; |
| 1282 | alloc++; |
| 1283 | } |
| 1284 | } |
| 1285 | |
| 1286 | err = nilfs_sufile_mark_dirty(nilfs->ns_sufile, segbuf->sb_segnum); |
| 1287 | if (err) |
| 1288 | goto failed; |
| 1289 | |
| 1290 | if (alloc) { |
| 1291 | err = nilfs_sufile_alloc(nilfs->ns_sufile, &nextnum); |
| 1292 | if (err) |
| 1293 | goto failed; |
| 1294 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1295 | nilfs_segbuf_set_next_segnum(segbuf, nextnum, nilfs); |
| 1296 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1297 | BUG_ON(!list_empty(&sci->sc_segbufs)); |
| 1298 | list_add_tail(&segbuf->sb_list, &sci->sc_segbufs); |
| 1299 | sci->sc_segbuf_nblocks = segbuf->sb_rest_blocks; |
Ryusuke Konishi | cece552 | 2009-04-06 19:01:58 -0700 | [diff] [blame] | 1300 | return 0; |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1301 | |
| 1302 | failed: |
| 1303 | nilfs_segbuf_free(segbuf); |
| 1304 | return err; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1305 | } |
| 1306 | |
| 1307 | static int nilfs_segctor_extend_segments(struct nilfs_sc_info *sci, |
| 1308 | struct the_nilfs *nilfs, int nadd) |
| 1309 | { |
Ryusuke Konishi | e29df39 | 2009-11-29 16:51:16 +0900 | [diff] [blame] | 1310 | struct nilfs_segment_buffer *segbuf, *prev; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1311 | struct inode *sufile = nilfs->ns_sufile; |
| 1312 | __u64 nextnextnum; |
| 1313 | LIST_HEAD(list); |
| 1314 | int err, ret, i; |
| 1315 | |
| 1316 | prev = NILFS_LAST_SEGBUF(&sci->sc_segbufs); |
| 1317 | /* |
| 1318 | * Since the segment specified with nextnum might be allocated during |
| 1319 | * the previous construction, the buffer including its segusage may |
| 1320 | * not be dirty. The following call ensures that the buffer is dirty |
| 1321 | * and will pin the buffer on memory until the sufile is written. |
| 1322 | */ |
Ryusuke Konishi | 61a189e | 2009-11-18 17:25:12 +0900 | [diff] [blame] | 1323 | err = nilfs_sufile_mark_dirty(sufile, prev->sb_nextnum); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1324 | if (unlikely(err)) |
| 1325 | return err; |
| 1326 | |
| 1327 | for (i = 0; i < nadd; i++) { |
| 1328 | /* extend segment info */ |
| 1329 | err = -ENOMEM; |
| 1330 | segbuf = nilfs_segbuf_new(sci->sc_super); |
| 1331 | if (unlikely(!segbuf)) |
| 1332 | goto failed; |
| 1333 | |
| 1334 | /* map this buffer to region of segment on-disk */ |
Ryusuke Konishi | cece552 | 2009-04-06 19:01:58 -0700 | [diff] [blame] | 1335 | nilfs_segbuf_map(segbuf, prev->sb_nextnum, 0, nilfs); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1336 | sci->sc_segbuf_nblocks += segbuf->sb_rest_blocks; |
| 1337 | |
| 1338 | /* allocate the next next full segment */ |
| 1339 | err = nilfs_sufile_alloc(sufile, &nextnextnum); |
| 1340 | if (unlikely(err)) |
| 1341 | goto failed_segbuf; |
| 1342 | |
| 1343 | segbuf->sb_sum.seg_seq = prev->sb_sum.seg_seq + 1; |
| 1344 | nilfs_segbuf_set_next_segnum(segbuf, nextnextnum, nilfs); |
| 1345 | |
| 1346 | list_add_tail(&segbuf->sb_list, &list); |
| 1347 | prev = segbuf; |
| 1348 | } |
Ryusuke Konishi | 0935db7 | 2009-11-29 02:39:11 +0900 | [diff] [blame] | 1349 | list_splice_tail(&list, &sci->sc_segbufs); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1350 | return 0; |
| 1351 | |
| 1352 | failed_segbuf: |
| 1353 | nilfs_segbuf_free(segbuf); |
| 1354 | failed: |
Ryusuke Konishi | e29df39 | 2009-11-29 16:51:16 +0900 | [diff] [blame] | 1355 | list_for_each_entry(segbuf, &list, sb_list) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1356 | ret = nilfs_sufile_free(sufile, segbuf->sb_nextnum); |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 1357 | WARN_ON(ret); /* never fails */ |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1358 | } |
Ryusuke Konishi | e29df39 | 2009-11-29 16:51:16 +0900 | [diff] [blame] | 1359 | nilfs_destroy_logs(&list); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1360 | return err; |
| 1361 | } |
| 1362 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1363 | static void nilfs_free_incomplete_logs(struct list_head *logs, |
| 1364 | struct the_nilfs *nilfs) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1365 | { |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1366 | struct nilfs_segment_buffer *segbuf, *prev; |
| 1367 | struct inode *sufile = nilfs->ns_sufile; |
Ryusuke Konishi | 9284ad2 | 2009-11-25 01:04:21 +0900 | [diff] [blame] | 1368 | int ret; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1369 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1370 | segbuf = NILFS_FIRST_SEGBUF(logs); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1371 | if (nilfs->ns_nextnum != segbuf->sb_nextnum) { |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1372 | ret = nilfs_sufile_free(sufile, segbuf->sb_nextnum); |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 1373 | WARN_ON(ret); /* never fails */ |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1374 | } |
Ryusuke Konishi | 9284ad2 | 2009-11-25 01:04:21 +0900 | [diff] [blame] | 1375 | if (atomic_read(&segbuf->sb_err)) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1376 | /* Case 1: The first segment failed */ |
| 1377 | if (segbuf->sb_pseg_start != segbuf->sb_fseg_start) |
| 1378 | /* Case 1a: Partial segment appended into an existing |
| 1379 | segment */ |
| 1380 | nilfs_terminate_segment(nilfs, segbuf->sb_fseg_start, |
| 1381 | segbuf->sb_fseg_end); |
| 1382 | else /* Case 1b: New full segment */ |
| 1383 | set_nilfs_discontinued(nilfs); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1384 | } |
| 1385 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1386 | prev = segbuf; |
| 1387 | list_for_each_entry_continue(segbuf, logs, sb_list) { |
| 1388 | if (prev->sb_nextnum != segbuf->sb_nextnum) { |
| 1389 | ret = nilfs_sufile_free(sufile, segbuf->sb_nextnum); |
| 1390 | WARN_ON(ret); /* never fails */ |
| 1391 | } |
Ryusuke Konishi | 9284ad2 | 2009-11-25 01:04:21 +0900 | [diff] [blame] | 1392 | if (atomic_read(&segbuf->sb_err) && |
| 1393 | segbuf->sb_segnum != nilfs->ns_nextnum) |
| 1394 | /* Case 2: extended segment (!= next) failed */ |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1395 | nilfs_sufile_set_error(sufile, segbuf->sb_segnum); |
| 1396 | prev = segbuf; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1397 | } |
| 1398 | } |
| 1399 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1400 | static void nilfs_segctor_update_segusage(struct nilfs_sc_info *sci, |
| 1401 | struct inode *sufile) |
| 1402 | { |
| 1403 | struct nilfs_segment_buffer *segbuf; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1404 | unsigned long live_blocks; |
| 1405 | int ret; |
| 1406 | |
| 1407 | list_for_each_entry(segbuf, &sci->sc_segbufs, sb_list) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1408 | live_blocks = segbuf->sb_sum.nblocks + |
| 1409 | (segbuf->sb_pseg_start - segbuf->sb_fseg_start); |
Ryusuke Konishi | 071ec54 | 2009-11-18 18:23:34 +0900 | [diff] [blame] | 1410 | ret = nilfs_sufile_set_segment_usage(sufile, segbuf->sb_segnum, |
| 1411 | live_blocks, |
| 1412 | sci->sc_seg_ctime); |
| 1413 | WARN_ON(ret); /* always succeed because the segusage is dirty */ |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1414 | } |
| 1415 | } |
| 1416 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1417 | static void nilfs_cancel_segusage(struct list_head *logs, struct inode *sufile) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1418 | { |
| 1419 | struct nilfs_segment_buffer *segbuf; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1420 | int ret; |
| 1421 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1422 | segbuf = NILFS_FIRST_SEGBUF(logs); |
Ryusuke Konishi | 071ec54 | 2009-11-18 18:23:34 +0900 | [diff] [blame] | 1423 | ret = nilfs_sufile_set_segment_usage(sufile, segbuf->sb_segnum, |
| 1424 | segbuf->sb_pseg_start - |
| 1425 | segbuf->sb_fseg_start, 0); |
| 1426 | WARN_ON(ret); /* always succeed because the segusage is dirty */ |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1427 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1428 | list_for_each_entry_continue(segbuf, logs, sb_list) { |
Ryusuke Konishi | 071ec54 | 2009-11-18 18:23:34 +0900 | [diff] [blame] | 1429 | ret = nilfs_sufile_set_segment_usage(sufile, segbuf->sb_segnum, |
| 1430 | 0, 0); |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 1431 | WARN_ON(ret); /* always succeed */ |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1432 | } |
| 1433 | } |
| 1434 | |
| 1435 | static void nilfs_segctor_truncate_segments(struct nilfs_sc_info *sci, |
| 1436 | struct nilfs_segment_buffer *last, |
| 1437 | struct inode *sufile) |
| 1438 | { |
Ryusuke Konishi | e29df39 | 2009-11-29 16:51:16 +0900 | [diff] [blame] | 1439 | struct nilfs_segment_buffer *segbuf = last; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1440 | int ret; |
| 1441 | |
Ryusuke Konishi | e29df39 | 2009-11-29 16:51:16 +0900 | [diff] [blame] | 1442 | list_for_each_entry_continue(segbuf, &sci->sc_segbufs, sb_list) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1443 | sci->sc_segbuf_nblocks -= segbuf->sb_rest_blocks; |
| 1444 | ret = nilfs_sufile_free(sufile, segbuf->sb_nextnum); |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 1445 | WARN_ON(ret); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1446 | } |
Ryusuke Konishi | e29df39 | 2009-11-29 16:51:16 +0900 | [diff] [blame] | 1447 | nilfs_truncate_logs(&sci->sc_segbufs, last); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1448 | } |
| 1449 | |
| 1450 | |
| 1451 | static int nilfs_segctor_collect(struct nilfs_sc_info *sci, |
| 1452 | struct the_nilfs *nilfs, int mode) |
| 1453 | { |
| 1454 | struct nilfs_cstage prev_stage = sci->sc_stage; |
| 1455 | int err, nadd = 1; |
| 1456 | |
| 1457 | /* Collection retry loop */ |
| 1458 | for (;;) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1459 | sci->sc_nblk_this_inc = 0; |
| 1460 | sci->sc_curseg = NILFS_FIRST_SEGBUF(&sci->sc_segbufs); |
| 1461 | |
| 1462 | err = nilfs_segctor_reset_segment_buffer(sci); |
| 1463 | if (unlikely(err)) |
| 1464 | goto failed; |
| 1465 | |
| 1466 | err = nilfs_segctor_collect_blocks(sci, mode); |
| 1467 | sci->sc_nblk_this_inc += sci->sc_curseg->sb_sum.nblocks; |
| 1468 | if (!err) |
| 1469 | break; |
| 1470 | |
| 1471 | if (unlikely(err != -E2BIG)) |
| 1472 | goto failed; |
| 1473 | |
| 1474 | /* The current segment is filled up */ |
Hitoshi Mitake | 5849770 | 2015-11-06 16:31:59 -0800 | [diff] [blame^] | 1475 | if (mode != SC_LSEG_SR || |
| 1476 | nilfs_sc_cstage_get(sci) < NILFS_ST_CPFILE) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1477 | break; |
| 1478 | |
Ryusuke Konishi | 2d8428a | 2010-03-22 14:01:24 +0900 | [diff] [blame] | 1479 | nilfs_clear_logs(&sci->sc_segbufs); |
| 1480 | |
Ryusuke Konishi | 071cb4b | 2009-05-16 23:44:55 +0900 | [diff] [blame] | 1481 | if (sci->sc_stage.flags & NILFS_CF_SUFREED) { |
| 1482 | err = nilfs_sufile_cancel_freev(nilfs->ns_sufile, |
| 1483 | sci->sc_freesegs, |
| 1484 | sci->sc_nfreesegs, |
| 1485 | NULL); |
| 1486 | WARN_ON(err); /* do not happen */ |
Andreas Rohner | 70f2fe3 | 2014-01-14 17:56:36 -0800 | [diff] [blame] | 1487 | sci->sc_stage.flags &= ~NILFS_CF_SUFREED; |
Ryusuke Konishi | 071cb4b | 2009-05-16 23:44:55 +0900 | [diff] [blame] | 1488 | } |
Andreas Rohner | 70f2fe3 | 2014-01-14 17:56:36 -0800 | [diff] [blame] | 1489 | |
| 1490 | err = nilfs_segctor_extend_segments(sci, nilfs, nadd); |
| 1491 | if (unlikely(err)) |
| 1492 | return err; |
| 1493 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1494 | nadd = min_t(int, nadd << 1, SC_MAX_SEGDELTA); |
| 1495 | sci->sc_stage = prev_stage; |
| 1496 | } |
| 1497 | nilfs_segctor_truncate_segments(sci, sci->sc_curseg, nilfs->ns_sufile); |
| 1498 | return 0; |
| 1499 | |
| 1500 | failed: |
| 1501 | return err; |
| 1502 | } |
| 1503 | |
| 1504 | static void nilfs_list_replace_buffer(struct buffer_head *old_bh, |
| 1505 | struct buffer_head *new_bh) |
| 1506 | { |
| 1507 | BUG_ON(!list_empty(&new_bh->b_assoc_buffers)); |
| 1508 | |
| 1509 | list_replace_init(&old_bh->b_assoc_buffers, &new_bh->b_assoc_buffers); |
| 1510 | /* The caller must release old_bh */ |
| 1511 | } |
| 1512 | |
| 1513 | static int |
| 1514 | nilfs_segctor_update_payload_blocknr(struct nilfs_sc_info *sci, |
| 1515 | struct nilfs_segment_buffer *segbuf, |
| 1516 | int mode) |
| 1517 | { |
| 1518 | struct inode *inode = NULL; |
| 1519 | sector_t blocknr; |
| 1520 | unsigned long nfinfo = segbuf->sb_sum.nfinfo; |
| 1521 | unsigned long nblocks = 0, ndatablk = 0; |
| 1522 | struct nilfs_sc_operations *sc_op = NULL; |
| 1523 | struct nilfs_segsum_pointer ssp; |
| 1524 | struct nilfs_finfo *finfo = NULL; |
| 1525 | union nilfs_binfo binfo; |
| 1526 | struct buffer_head *bh, *bh_org; |
| 1527 | ino_t ino = 0; |
| 1528 | int err = 0; |
| 1529 | |
| 1530 | if (!nfinfo) |
| 1531 | goto out; |
| 1532 | |
| 1533 | blocknr = segbuf->sb_pseg_start + segbuf->sb_sum.nsumblk; |
| 1534 | ssp.bh = NILFS_SEGBUF_FIRST_BH(&segbuf->sb_segsum_buffers); |
| 1535 | ssp.offset = sizeof(struct nilfs_segment_summary); |
| 1536 | |
| 1537 | list_for_each_entry(bh, &segbuf->sb_payload_buffers, b_assoc_buffers) { |
Ryusuke Konishi | 1e2b68b | 2010-03-23 01:15:31 +0900 | [diff] [blame] | 1538 | if (bh == segbuf->sb_super_root) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1539 | break; |
| 1540 | if (!finfo) { |
| 1541 | finfo = nilfs_segctor_map_segsum_entry( |
| 1542 | sci, &ssp, sizeof(*finfo)); |
| 1543 | ino = le64_to_cpu(finfo->fi_ino); |
| 1544 | nblocks = le32_to_cpu(finfo->fi_nblocks); |
| 1545 | ndatablk = le32_to_cpu(finfo->fi_ndatablk); |
| 1546 | |
Ryusuke Konishi | aa405b1 | 2011-05-05 12:56:51 +0900 | [diff] [blame] | 1547 | inode = bh->b_page->mapping->host; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1548 | |
| 1549 | if (mode == SC_LSEG_DSYNC) |
| 1550 | sc_op = &nilfs_sc_dsync_ops; |
| 1551 | else if (ino == NILFS_DAT_INO) |
| 1552 | sc_op = &nilfs_sc_dat_ops; |
| 1553 | else /* file blocks */ |
| 1554 | sc_op = &nilfs_sc_file_ops; |
| 1555 | } |
| 1556 | bh_org = bh; |
| 1557 | get_bh(bh_org); |
| 1558 | err = nilfs_bmap_assign(NILFS_I(inode)->i_bmap, &bh, blocknr, |
| 1559 | &binfo); |
| 1560 | if (bh != bh_org) |
| 1561 | nilfs_list_replace_buffer(bh_org, bh); |
| 1562 | brelse(bh_org); |
| 1563 | if (unlikely(err)) |
| 1564 | goto failed_bmap; |
| 1565 | |
| 1566 | if (ndatablk > 0) |
| 1567 | sc_op->write_data_binfo(sci, &ssp, &binfo); |
| 1568 | else |
| 1569 | sc_op->write_node_binfo(sci, &ssp, &binfo); |
| 1570 | |
| 1571 | blocknr++; |
| 1572 | if (--nblocks == 0) { |
| 1573 | finfo = NULL; |
| 1574 | if (--nfinfo == 0) |
| 1575 | break; |
| 1576 | } else if (ndatablk > 0) |
| 1577 | ndatablk--; |
| 1578 | } |
| 1579 | out: |
| 1580 | return 0; |
| 1581 | |
| 1582 | failed_bmap: |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1583 | return err; |
| 1584 | } |
| 1585 | |
| 1586 | static int nilfs_segctor_assign(struct nilfs_sc_info *sci, int mode) |
| 1587 | { |
| 1588 | struct nilfs_segment_buffer *segbuf; |
| 1589 | int err; |
| 1590 | |
| 1591 | list_for_each_entry(segbuf, &sci->sc_segbufs, sb_list) { |
| 1592 | err = nilfs_segctor_update_payload_blocknr(sci, segbuf, mode); |
| 1593 | if (unlikely(err)) |
| 1594 | return err; |
| 1595 | nilfs_segbuf_fill_in_segsum(segbuf); |
| 1596 | } |
| 1597 | return 0; |
| 1598 | } |
| 1599 | |
Ryusuke Konishi | 1cb2d38 | 2011-04-04 12:53:28 +0900 | [diff] [blame] | 1600 | static void nilfs_begin_page_io(struct page *page) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1601 | { |
| 1602 | if (!page || PageWriteback(page)) |
| 1603 | /* For split b-tree node pages, this function may be called |
| 1604 | twice. We ignore the 2nd or later calls by this check. */ |
Ryusuke Konishi | 1cb2d38 | 2011-04-04 12:53:28 +0900 | [diff] [blame] | 1605 | return; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1606 | |
| 1607 | lock_page(page); |
| 1608 | clear_page_dirty_for_io(page); |
| 1609 | set_page_writeback(page); |
| 1610 | unlock_page(page); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1611 | } |
| 1612 | |
Ryusuke Konishi | 1cb2d38 | 2011-04-04 12:53:28 +0900 | [diff] [blame] | 1613 | static void nilfs_segctor_prepare_write(struct nilfs_sc_info *sci) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1614 | { |
| 1615 | struct nilfs_segment_buffer *segbuf; |
| 1616 | struct page *bd_page = NULL, *fs_page = NULL; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1617 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1618 | list_for_each_entry(segbuf, &sci->sc_segbufs, sb_list) { |
| 1619 | struct buffer_head *bh; |
| 1620 | |
| 1621 | list_for_each_entry(bh, &segbuf->sb_segsum_buffers, |
| 1622 | b_assoc_buffers) { |
| 1623 | if (bh->b_page != bd_page) { |
| 1624 | if (bd_page) { |
| 1625 | lock_page(bd_page); |
| 1626 | clear_page_dirty_for_io(bd_page); |
| 1627 | set_page_writeback(bd_page); |
| 1628 | unlock_page(bd_page); |
| 1629 | } |
| 1630 | bd_page = bh->b_page; |
| 1631 | } |
| 1632 | } |
| 1633 | |
| 1634 | list_for_each_entry(bh, &segbuf->sb_payload_buffers, |
| 1635 | b_assoc_buffers) { |
Vyacheslav Dubeyko | 7f42ec3 | 2013-09-30 13:45:12 -0700 | [diff] [blame] | 1636 | set_buffer_async_write(bh); |
Ryusuke Konishi | 1e2b68b | 2010-03-23 01:15:31 +0900 | [diff] [blame] | 1637 | if (bh == segbuf->sb_super_root) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1638 | if (bh->b_page != bd_page) { |
| 1639 | lock_page(bd_page); |
| 1640 | clear_page_dirty_for_io(bd_page); |
| 1641 | set_page_writeback(bd_page); |
| 1642 | unlock_page(bd_page); |
| 1643 | bd_page = bh->b_page; |
| 1644 | } |
| 1645 | break; |
| 1646 | } |
| 1647 | if (bh->b_page != fs_page) { |
Ryusuke Konishi | 1cb2d38 | 2011-04-04 12:53:28 +0900 | [diff] [blame] | 1648 | nilfs_begin_page_io(fs_page); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1649 | fs_page = bh->b_page; |
| 1650 | } |
| 1651 | } |
| 1652 | } |
| 1653 | if (bd_page) { |
| 1654 | lock_page(bd_page); |
| 1655 | clear_page_dirty_for_io(bd_page); |
| 1656 | set_page_writeback(bd_page); |
| 1657 | unlock_page(bd_page); |
| 1658 | } |
Ryusuke Konishi | 1cb2d38 | 2011-04-04 12:53:28 +0900 | [diff] [blame] | 1659 | nilfs_begin_page_io(fs_page); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1660 | } |
| 1661 | |
| 1662 | static int nilfs_segctor_write(struct nilfs_sc_info *sci, |
Ryusuke Konishi | 9c965ba | 2009-11-29 01:17:31 +0900 | [diff] [blame] | 1663 | struct the_nilfs *nilfs) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1664 | { |
Ryusuke Konishi | d1c6b72 | 2009-12-17 00:55:40 +0900 | [diff] [blame] | 1665 | int ret; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1666 | |
Ryusuke Konishi | d1c6b72 | 2009-12-17 00:55:40 +0900 | [diff] [blame] | 1667 | ret = nilfs_write_logs(&sci->sc_segbufs, nilfs); |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1668 | list_splice_tail_init(&sci->sc_segbufs, &sci->sc_write_logs); |
| 1669 | return ret; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1670 | } |
| 1671 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1672 | static void nilfs_end_page_io(struct page *page, int err) |
| 1673 | { |
| 1674 | if (!page) |
| 1675 | return; |
| 1676 | |
Ryusuke Konishi | a977784 | 2009-07-28 17:55:29 +0900 | [diff] [blame] | 1677 | if (buffer_nilfs_node(page_buffers(page)) && !PageWriteback(page)) { |
Ryusuke Konishi | 8227b29 | 2009-06-18 23:52:23 +0900 | [diff] [blame] | 1678 | /* |
| 1679 | * For b-tree node pages, this function may be called twice |
| 1680 | * or more because they might be split in a segment. |
| 1681 | */ |
Ryusuke Konishi | a977784 | 2009-07-28 17:55:29 +0900 | [diff] [blame] | 1682 | if (PageDirty(page)) { |
| 1683 | /* |
| 1684 | * For pages holding split b-tree node buffers, dirty |
| 1685 | * flag on the buffers may be cleared discretely. |
| 1686 | * In that case, the page is once redirtied for |
| 1687 | * remaining buffers, and it must be cancelled if |
| 1688 | * all the buffers get cleaned later. |
| 1689 | */ |
| 1690 | lock_page(page); |
| 1691 | if (nilfs_page_buffers_clean(page)) |
| 1692 | __nilfs_clear_page_dirty(page); |
| 1693 | unlock_page(page); |
| 1694 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1695 | return; |
Ryusuke Konishi | a977784 | 2009-07-28 17:55:29 +0900 | [diff] [blame] | 1696 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1697 | |
Ryusuke Konishi | 1cb2d38 | 2011-04-04 12:53:28 +0900 | [diff] [blame] | 1698 | if (!err) { |
| 1699 | if (!nilfs_page_buffers_clean(page)) |
| 1700 | __set_page_dirty_nobuffers(page); |
| 1701 | ClearPageError(page); |
| 1702 | } else { |
| 1703 | __set_page_dirty_nobuffers(page); |
| 1704 | SetPageError(page); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1705 | } |
Ryusuke Konishi | 1cb2d38 | 2011-04-04 12:53:28 +0900 | [diff] [blame] | 1706 | |
| 1707 | end_page_writeback(page); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1708 | } |
| 1709 | |
Ryusuke Konishi | 1cb2d38 | 2011-04-04 12:53:28 +0900 | [diff] [blame] | 1710 | static void nilfs_abort_logs(struct list_head *logs, int err) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1711 | { |
| 1712 | struct nilfs_segment_buffer *segbuf; |
| 1713 | struct page *bd_page = NULL, *fs_page = NULL; |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1714 | struct buffer_head *bh; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1715 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1716 | if (list_empty(logs)) |
| 1717 | return; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1718 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1719 | list_for_each_entry(segbuf, logs, sb_list) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1720 | list_for_each_entry(bh, &segbuf->sb_segsum_buffers, |
| 1721 | b_assoc_buffers) { |
| 1722 | if (bh->b_page != bd_page) { |
| 1723 | if (bd_page) |
| 1724 | end_page_writeback(bd_page); |
| 1725 | bd_page = bh->b_page; |
| 1726 | } |
| 1727 | } |
| 1728 | |
| 1729 | list_for_each_entry(bh, &segbuf->sb_payload_buffers, |
| 1730 | b_assoc_buffers) { |
Vyacheslav Dubeyko | 7f42ec3 | 2013-09-30 13:45:12 -0700 | [diff] [blame] | 1731 | clear_buffer_async_write(bh); |
Ryusuke Konishi | 1e2b68b | 2010-03-23 01:15:31 +0900 | [diff] [blame] | 1732 | if (bh == segbuf->sb_super_root) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1733 | if (bh->b_page != bd_page) { |
| 1734 | end_page_writeback(bd_page); |
| 1735 | bd_page = bh->b_page; |
| 1736 | } |
| 1737 | break; |
| 1738 | } |
| 1739 | if (bh->b_page != fs_page) { |
| 1740 | nilfs_end_page_io(fs_page, err); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1741 | fs_page = bh->b_page; |
| 1742 | } |
| 1743 | } |
| 1744 | } |
| 1745 | if (bd_page) |
| 1746 | end_page_writeback(bd_page); |
| 1747 | |
| 1748 | nilfs_end_page_io(fs_page, err); |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1749 | } |
| 1750 | |
| 1751 | static void nilfs_segctor_abort_construction(struct nilfs_sc_info *sci, |
| 1752 | struct the_nilfs *nilfs, int err) |
| 1753 | { |
| 1754 | LIST_HEAD(logs); |
| 1755 | int ret; |
| 1756 | |
| 1757 | list_splice_tail_init(&sci->sc_write_logs, &logs); |
| 1758 | ret = nilfs_wait_on_logs(&logs); |
Ryusuke Konishi | 1cb2d38 | 2011-04-04 12:53:28 +0900 | [diff] [blame] | 1759 | nilfs_abort_logs(&logs, ret ? : err); |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1760 | |
| 1761 | list_splice_tail_init(&sci->sc_segbufs, &logs); |
| 1762 | nilfs_cancel_segusage(&logs, nilfs->ns_sufile); |
| 1763 | nilfs_free_incomplete_logs(&logs, nilfs); |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1764 | |
| 1765 | if (sci->sc_stage.flags & NILFS_CF_SUFREED) { |
| 1766 | ret = nilfs_sufile_cancel_freev(nilfs->ns_sufile, |
| 1767 | sci->sc_freesegs, |
| 1768 | sci->sc_nfreesegs, |
| 1769 | NULL); |
| 1770 | WARN_ON(ret); /* do not happen */ |
| 1771 | } |
| 1772 | |
| 1773 | nilfs_destroy_logs(&logs); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1774 | } |
| 1775 | |
| 1776 | static void nilfs_set_next_segment(struct the_nilfs *nilfs, |
| 1777 | struct nilfs_segment_buffer *segbuf) |
| 1778 | { |
| 1779 | nilfs->ns_segnum = segbuf->sb_segnum; |
| 1780 | nilfs->ns_nextnum = segbuf->sb_nextnum; |
| 1781 | nilfs->ns_pseg_offset = segbuf->sb_pseg_start - segbuf->sb_fseg_start |
| 1782 | + segbuf->sb_sum.nblocks; |
| 1783 | nilfs->ns_seg_seq = segbuf->sb_sum.seg_seq; |
| 1784 | nilfs->ns_ctime = segbuf->sb_sum.ctime; |
| 1785 | } |
| 1786 | |
| 1787 | static void nilfs_segctor_complete_write(struct nilfs_sc_info *sci) |
| 1788 | { |
| 1789 | struct nilfs_segment_buffer *segbuf; |
| 1790 | struct page *bd_page = NULL, *fs_page = NULL; |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 1791 | struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
Ryusuke Konishi | 1e2b68b | 2010-03-23 01:15:31 +0900 | [diff] [blame] | 1792 | int update_sr = false; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1793 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1794 | list_for_each_entry(segbuf, &sci->sc_write_logs, sb_list) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1795 | struct buffer_head *bh; |
| 1796 | |
| 1797 | list_for_each_entry(bh, &segbuf->sb_segsum_buffers, |
| 1798 | b_assoc_buffers) { |
| 1799 | set_buffer_uptodate(bh); |
| 1800 | clear_buffer_dirty(bh); |
| 1801 | if (bh->b_page != bd_page) { |
| 1802 | if (bd_page) |
| 1803 | end_page_writeback(bd_page); |
| 1804 | bd_page = bh->b_page; |
| 1805 | } |
| 1806 | } |
| 1807 | /* |
| 1808 | * We assume that the buffers which belong to the same page |
| 1809 | * continue over the buffer list. |
| 1810 | * Under this assumption, the last BHs of pages is |
| 1811 | * identifiable by the discontinuity of bh->b_page |
| 1812 | * (page != fs_page). |
| 1813 | * |
| 1814 | * For B-tree node blocks, however, this assumption is not |
| 1815 | * guaranteed. The cleanup code of B-tree node pages needs |
| 1816 | * special care. |
| 1817 | */ |
| 1818 | list_for_each_entry(bh, &segbuf->sb_payload_buffers, |
| 1819 | b_assoc_buffers) { |
Ryusuke Konishi | ead8ecf | 2015-04-16 12:46:28 -0700 | [diff] [blame] | 1820 | const unsigned long set_bits = (1 << BH_Uptodate); |
| 1821 | const unsigned long clear_bits = |
| 1822 | (1 << BH_Dirty | 1 << BH_Async_Write | |
| 1823 | 1 << BH_Delay | 1 << BH_NILFS_Volatile | |
| 1824 | 1 << BH_NILFS_Redirected); |
| 1825 | |
| 1826 | set_mask_bits(&bh->b_state, clear_bits, set_bits); |
Ryusuke Konishi | 1e2b68b | 2010-03-23 01:15:31 +0900 | [diff] [blame] | 1827 | if (bh == segbuf->sb_super_root) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1828 | if (bh->b_page != bd_page) { |
| 1829 | end_page_writeback(bd_page); |
| 1830 | bd_page = bh->b_page; |
| 1831 | } |
Ryusuke Konishi | 1e2b68b | 2010-03-23 01:15:31 +0900 | [diff] [blame] | 1832 | update_sr = true; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1833 | break; |
| 1834 | } |
| 1835 | if (bh->b_page != fs_page) { |
| 1836 | nilfs_end_page_io(fs_page, 0); |
| 1837 | fs_page = bh->b_page; |
| 1838 | } |
| 1839 | } |
| 1840 | |
Ryusuke Konishi | 4762077 | 2010-05-23 21:48:36 +0900 | [diff] [blame] | 1841 | if (!nilfs_segbuf_simplex(segbuf)) { |
| 1842 | if (segbuf->sb_sum.flags & NILFS_SS_LOGBGN) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1843 | set_bit(NILFS_SC_UNCLOSED, &sci->sc_flags); |
| 1844 | sci->sc_lseg_stime = jiffies; |
| 1845 | } |
Ryusuke Konishi | 4762077 | 2010-05-23 21:48:36 +0900 | [diff] [blame] | 1846 | if (segbuf->sb_sum.flags & NILFS_SS_LOGEND) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1847 | clear_bit(NILFS_SC_UNCLOSED, &sci->sc_flags); |
| 1848 | } |
| 1849 | } |
| 1850 | /* |
| 1851 | * Since pages may continue over multiple segment buffers, |
| 1852 | * end of the last page must be checked outside of the loop. |
| 1853 | */ |
| 1854 | if (bd_page) |
| 1855 | end_page_writeback(bd_page); |
| 1856 | |
| 1857 | nilfs_end_page_io(fs_page, 0); |
| 1858 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1859 | nilfs_drop_collected_inodes(&sci->sc_dirty_files); |
| 1860 | |
Ryusuke Konishi | c1c1d7092 | 2010-08-29 12:44:56 +0900 | [diff] [blame] | 1861 | if (nilfs_doing_gc()) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1862 | nilfs_drop_collected_inodes(&sci->sc_gc_inodes); |
Ryusuke Konishi | c1c1d7092 | 2010-08-29 12:44:56 +0900 | [diff] [blame] | 1863 | else |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1864 | nilfs->ns_nongc_ctime = sci->sc_seg_ctime; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1865 | |
| 1866 | sci->sc_nblk_inc += sci->sc_nblk_this_inc; |
| 1867 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1868 | segbuf = NILFS_LAST_SEGBUF(&sci->sc_write_logs); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1869 | nilfs_set_next_segment(nilfs, segbuf); |
| 1870 | |
| 1871 | if (update_sr) { |
Andreas Rohner | e2c7617 | 2014-10-13 15:53:20 -0700 | [diff] [blame] | 1872 | nilfs->ns_flushed_device = 0; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1873 | nilfs_set_last_segment(nilfs, segbuf->sb_pseg_start, |
Ryusuke Konishi | e339ad3 | 2009-04-06 19:01:59 -0700 | [diff] [blame] | 1874 | segbuf->sb_sum.seg_seq, nilfs->ns_cno++); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1875 | |
Ryusuke Konishi | c96fa46 | 2009-04-06 19:01:57 -0700 | [diff] [blame] | 1876 | clear_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1877 | clear_bit(NILFS_SC_DIRTY, &sci->sc_flags); |
| 1878 | set_bit(NILFS_SC_SUPER_ROOT, &sci->sc_flags); |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1879 | nilfs_segctor_clear_metadata_dirty(sci); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1880 | } else |
| 1881 | clear_bit(NILFS_SC_SUPER_ROOT, &sci->sc_flags); |
| 1882 | } |
| 1883 | |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 1884 | static int nilfs_segctor_wait(struct nilfs_sc_info *sci) |
| 1885 | { |
| 1886 | int ret; |
| 1887 | |
| 1888 | ret = nilfs_wait_on_logs(&sci->sc_write_logs); |
| 1889 | if (!ret) { |
| 1890 | nilfs_segctor_complete_write(sci); |
| 1891 | nilfs_destroy_logs(&sci->sc_write_logs); |
| 1892 | } |
| 1893 | return ret; |
| 1894 | } |
| 1895 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 1896 | static int nilfs_segctor_collect_dirty_files(struct nilfs_sc_info *sci, |
| 1897 | struct the_nilfs *nilfs) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1898 | { |
| 1899 | struct nilfs_inode_info *ii, *n; |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 1900 | struct inode *ifile = sci->sc_root->ifile; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1901 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 1902 | spin_lock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1903 | retry: |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 1904 | 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] | 1905 | if (!ii->i_bh) { |
| 1906 | struct buffer_head *ibh; |
| 1907 | int err; |
| 1908 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 1909 | spin_unlock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1910 | err = nilfs_ifile_get_inode_block( |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 1911 | ifile, ii->vfs_inode.i_ino, &ibh); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1912 | if (unlikely(err)) { |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 1913 | nilfs_warning(sci->sc_super, __func__, |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1914 | "failed to get inode block.\n"); |
| 1915 | return err; |
| 1916 | } |
Ryusuke Konishi | 5fc7b14 | 2011-05-05 12:56:51 +0900 | [diff] [blame] | 1917 | mark_buffer_dirty(ibh); |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 1918 | nilfs_mdt_mark_dirty(ifile); |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 1919 | spin_lock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1920 | if (likely(!ii->i_bh)) |
| 1921 | ii->i_bh = ibh; |
| 1922 | else |
| 1923 | brelse(ibh); |
| 1924 | goto retry; |
| 1925 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1926 | |
| 1927 | clear_bit(NILFS_I_QUEUED, &ii->i_state); |
| 1928 | set_bit(NILFS_I_BUSY, &ii->i_state); |
Nicolas Kaiser | eaae0f3 | 2011-03-19 16:45:30 +0100 | [diff] [blame] | 1929 | list_move_tail(&ii->i_dirty, &sci->sc_dirty_files); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1930 | } |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 1931 | spin_unlock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1932 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1933 | return 0; |
| 1934 | } |
| 1935 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 1936 | static void nilfs_segctor_drop_written_files(struct nilfs_sc_info *sci, |
| 1937 | struct the_nilfs *nilfs) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1938 | { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1939 | struct nilfs_inode_info *ii, *n; |
Ryusuke Konishi | 283ee148 | 2015-03-12 16:26:00 -0700 | [diff] [blame] | 1940 | int during_mount = !(sci->sc_super->s_flags & MS_ACTIVE); |
Ryusuke Konishi | 7ef3ff2 | 2015-02-05 12:25:20 -0800 | [diff] [blame] | 1941 | int defer_iput = false; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1942 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 1943 | spin_lock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1944 | list_for_each_entry_safe(ii, n, &sci->sc_dirty_files, i_dirty) { |
| 1945 | if (!test_and_clear_bit(NILFS_I_UPDATED, &ii->i_state) || |
Ryusuke Konishi | 6c43f41 | 2010-08-20 20:10:38 +0900 | [diff] [blame] | 1946 | test_bit(NILFS_I_DIRTY, &ii->i_state)) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1947 | continue; |
Ryusuke Konishi | 6c43f41 | 2010-08-20 20:10:38 +0900 | [diff] [blame] | 1948 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1949 | clear_bit(NILFS_I_BUSY, &ii->i_state); |
| 1950 | brelse(ii->i_bh); |
| 1951 | ii->i_bh = NULL; |
Ryusuke Konishi | 7ef3ff2 | 2015-02-05 12:25:20 -0800 | [diff] [blame] | 1952 | list_del_init(&ii->i_dirty); |
Ryusuke Konishi | 283ee148 | 2015-03-12 16:26:00 -0700 | [diff] [blame] | 1953 | if (!ii->vfs_inode.i_nlink || during_mount) { |
Ryusuke Konishi | 7ef3ff2 | 2015-02-05 12:25:20 -0800 | [diff] [blame] | 1954 | /* |
Ryusuke Konishi | 283ee148 | 2015-03-12 16:26:00 -0700 | [diff] [blame] | 1955 | * Defer calling iput() to avoid deadlocks if |
| 1956 | * i_nlink == 0 or mount is not yet finished. |
Ryusuke Konishi | 7ef3ff2 | 2015-02-05 12:25:20 -0800 | [diff] [blame] | 1957 | */ |
| 1958 | list_add_tail(&ii->i_dirty, &sci->sc_iput_queue); |
| 1959 | defer_iput = true; |
| 1960 | } else { |
| 1961 | spin_unlock(&nilfs->ns_inode_lock); |
| 1962 | iput(&ii->vfs_inode); |
| 1963 | spin_lock(&nilfs->ns_inode_lock); |
| 1964 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1965 | } |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 1966 | spin_unlock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 7ef3ff2 | 2015-02-05 12:25:20 -0800 | [diff] [blame] | 1967 | |
| 1968 | if (defer_iput) |
| 1969 | schedule_work(&sci->sc_iput_work); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1970 | } |
| 1971 | |
| 1972 | /* |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1973 | * Main procedure of segment constructor |
| 1974 | */ |
| 1975 | static int nilfs_segctor_do_construct(struct nilfs_sc_info *sci, int mode) |
| 1976 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 1977 | struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
Ryusuke Konishi | 1e2b68b | 2010-03-23 01:15:31 +0900 | [diff] [blame] | 1978 | int err; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1979 | |
Hitoshi Mitake | 5849770 | 2015-11-06 16:31:59 -0800 | [diff] [blame^] | 1980 | nilfs_sc_cstage_set(sci, NILFS_ST_INIT); |
Ryusuke Konishi | 6c43f41 | 2010-08-20 20:10:38 +0900 | [diff] [blame] | 1981 | sci->sc_cno = nilfs->ns_cno; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1982 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 1983 | err = nilfs_segctor_collect_dirty_files(sci, nilfs); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1984 | if (unlikely(err)) |
| 1985 | goto out; |
| 1986 | |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 1987 | if (nilfs_test_metadata_dirty(nilfs, sci->sc_root)) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 1988 | set_bit(NILFS_SC_DIRTY, &sci->sc_flags); |
| 1989 | |
| 1990 | if (nilfs_segctor_clean(sci)) |
| 1991 | goto out; |
| 1992 | |
| 1993 | do { |
| 1994 | sci->sc_stage.flags &= ~NILFS_CF_HISTORY_MASK; |
| 1995 | |
| 1996 | err = nilfs_segctor_begin_construction(sci, nilfs); |
| 1997 | if (unlikely(err)) |
| 1998 | goto out; |
| 1999 | |
| 2000 | /* Update time stamp */ |
| 2001 | sci->sc_seg_ctime = get_seconds(); |
| 2002 | |
| 2003 | err = nilfs_segctor_collect(sci, nilfs, mode); |
| 2004 | if (unlikely(err)) |
| 2005 | goto failed; |
| 2006 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2007 | /* Avoid empty segment */ |
Hitoshi Mitake | 5849770 | 2015-11-06 16:31:59 -0800 | [diff] [blame^] | 2008 | if (nilfs_sc_cstage_get(sci) == NILFS_ST_DONE && |
Ryusuke Konishi | 4762077 | 2010-05-23 21:48:36 +0900 | [diff] [blame] | 2009 | nilfs_segbuf_empty(sci->sc_curseg)) { |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 2010 | nilfs_segctor_abort_construction(sci, nilfs, 1); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2011 | goto out; |
| 2012 | } |
| 2013 | |
| 2014 | err = nilfs_segctor_assign(sci, mode); |
| 2015 | if (unlikely(err)) |
| 2016 | goto failed; |
| 2017 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2018 | if (sci->sc_stage.flags & NILFS_CF_IFILE_STARTED) |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 2019 | nilfs_segctor_fill_in_file_bmap(sci); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2020 | |
Ryusuke Konishi | 1e2b68b | 2010-03-23 01:15:31 +0900 | [diff] [blame] | 2021 | if (mode == SC_LSEG_SR && |
Hitoshi Mitake | 5849770 | 2015-11-06 16:31:59 -0800 | [diff] [blame^] | 2022 | nilfs_sc_cstage_get(sci) >= NILFS_ST_CPFILE) { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2023 | err = nilfs_segctor_fill_in_checkpoint(sci); |
| 2024 | if (unlikely(err)) |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 2025 | goto failed_to_write; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2026 | |
| 2027 | nilfs_segctor_fill_in_super_root(sci, nilfs); |
| 2028 | } |
| 2029 | nilfs_segctor_update_segusage(sci, nilfs->ns_sufile); |
| 2030 | |
| 2031 | /* Write partial segments */ |
Ryusuke Konishi | 1cb2d38 | 2011-04-04 12:53:28 +0900 | [diff] [blame] | 2032 | nilfs_segctor_prepare_write(sci); |
Ryusuke Konishi | aaed1d5 | 2010-03-23 01:50:38 +0900 | [diff] [blame] | 2033 | |
| 2034 | nilfs_add_checksums_on_logs(&sci->sc_segbufs, |
| 2035 | nilfs->ns_crc_seed); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2036 | |
Ryusuke Konishi | 9c965ba | 2009-11-29 01:17:31 +0900 | [diff] [blame] | 2037 | err = nilfs_segctor_write(sci, nilfs); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2038 | if (unlikely(err)) |
| 2039 | goto failed_to_write; |
| 2040 | |
Hitoshi Mitake | 5849770 | 2015-11-06 16:31:59 -0800 | [diff] [blame^] | 2041 | if (nilfs_sc_cstage_get(sci) == NILFS_ST_DONE || |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 2042 | nilfs->ns_blocksize_bits != PAGE_CACHE_SHIFT) { |
| 2043 | /* |
| 2044 | * At this point, we avoid double buffering |
| 2045 | * for blocksize < pagesize because page dirty |
| 2046 | * flag is turned off during write and dirty |
| 2047 | * buffers are not properly collected for |
| 2048 | * pages crossing over segments. |
| 2049 | */ |
| 2050 | err = nilfs_segctor_wait(sci); |
| 2051 | if (err) |
| 2052 | goto failed_to_write; |
| 2053 | } |
Hitoshi Mitake | 5849770 | 2015-11-06 16:31:59 -0800 | [diff] [blame^] | 2054 | } while (nilfs_sc_cstage_get(sci) != NILFS_ST_DONE); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2055 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2056 | out: |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2057 | nilfs_segctor_drop_written_files(sci, nilfs); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2058 | return err; |
| 2059 | |
| 2060 | failed_to_write: |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2061 | if (sci->sc_stage.flags & NILFS_CF_IFILE_STARTED) |
| 2062 | nilfs_redirty_inodes(&sci->sc_dirty_files); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2063 | |
| 2064 | failed: |
| 2065 | if (nilfs_doing_gc()) |
| 2066 | nilfs_redirty_inodes(&sci->sc_gc_inodes); |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 2067 | nilfs_segctor_abort_construction(sci, nilfs, err); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2068 | goto out; |
| 2069 | } |
| 2070 | |
| 2071 | /** |
Ryusuke Konishi | 9ccf56c | 2010-03-14 03:01:03 +0900 | [diff] [blame] | 2072 | * nilfs_segctor_start_timer - set timer of background write |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2073 | * @sci: nilfs_sc_info |
| 2074 | * |
| 2075 | * If the timer has already been set, it ignores the new request. |
| 2076 | * This function MUST be called within a section locking the segment |
| 2077 | * semaphore. |
| 2078 | */ |
| 2079 | static void nilfs_segctor_start_timer(struct nilfs_sc_info *sci) |
| 2080 | { |
| 2081 | spin_lock(&sci->sc_state_lock); |
Li Hong | fdce895 | 2010-04-10 23:25:39 +0800 | [diff] [blame] | 2082 | if (!(sci->sc_state & NILFS_SEGCTOR_COMMIT)) { |
| 2083 | sci->sc_timer.expires = jiffies + sci->sc_interval; |
| 2084 | add_timer(&sci->sc_timer); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2085 | sci->sc_state |= NILFS_SEGCTOR_COMMIT; |
| 2086 | } |
| 2087 | spin_unlock(&sci->sc_state_lock); |
| 2088 | } |
| 2089 | |
| 2090 | static void nilfs_segctor_do_flush(struct nilfs_sc_info *sci, int bn) |
| 2091 | { |
| 2092 | spin_lock(&sci->sc_state_lock); |
| 2093 | if (!(sci->sc_flush_request & (1 << bn))) { |
| 2094 | unsigned long prev_req = sci->sc_flush_request; |
| 2095 | |
| 2096 | sci->sc_flush_request |= (1 << bn); |
| 2097 | if (!prev_req) |
| 2098 | wake_up(&sci->sc_wait_daemon); |
| 2099 | } |
| 2100 | spin_unlock(&sci->sc_state_lock); |
| 2101 | } |
| 2102 | |
| 2103 | /** |
| 2104 | * nilfs_flush_segment - trigger a segment construction for resource control |
| 2105 | * @sb: super block |
| 2106 | * @ino: inode number of the file to be flushed out. |
| 2107 | */ |
| 2108 | void nilfs_flush_segment(struct super_block *sb, ino_t ino) |
| 2109 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2110 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2111 | struct nilfs_sc_info *sci = nilfs->ns_writer; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2112 | |
| 2113 | if (!sci || nilfs_doing_construction()) |
| 2114 | return; |
| 2115 | nilfs_segctor_do_flush(sci, NILFS_MDT_INODE(sb, ino) ? ino : 0); |
| 2116 | /* assign bit 0 to data files */ |
| 2117 | } |
| 2118 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2119 | struct nilfs_segctor_wait_request { |
| 2120 | wait_queue_t wq; |
| 2121 | __u32 seq; |
| 2122 | int err; |
| 2123 | atomic_t done; |
| 2124 | }; |
| 2125 | |
| 2126 | static int nilfs_segctor_sync(struct nilfs_sc_info *sci) |
| 2127 | { |
| 2128 | struct nilfs_segctor_wait_request wait_req; |
| 2129 | int err = 0; |
| 2130 | |
| 2131 | spin_lock(&sci->sc_state_lock); |
| 2132 | init_wait(&wait_req.wq); |
| 2133 | wait_req.err = 0; |
| 2134 | atomic_set(&wait_req.done, 0); |
| 2135 | wait_req.seq = ++sci->sc_seq_request; |
| 2136 | spin_unlock(&sci->sc_state_lock); |
| 2137 | |
| 2138 | init_waitqueue_entry(&wait_req.wq, current); |
| 2139 | add_wait_queue(&sci->sc_wait_request, &wait_req.wq); |
| 2140 | set_current_state(TASK_INTERRUPTIBLE); |
| 2141 | wake_up(&sci->sc_wait_daemon); |
| 2142 | |
| 2143 | for (;;) { |
| 2144 | if (atomic_read(&wait_req.done)) { |
| 2145 | err = wait_req.err; |
| 2146 | break; |
| 2147 | } |
| 2148 | if (!signal_pending(current)) { |
| 2149 | schedule(); |
| 2150 | continue; |
| 2151 | } |
| 2152 | err = -ERESTARTSYS; |
| 2153 | break; |
| 2154 | } |
| 2155 | finish_wait(&sci->sc_wait_request, &wait_req.wq); |
| 2156 | return err; |
| 2157 | } |
| 2158 | |
| 2159 | static void nilfs_segctor_wakeup(struct nilfs_sc_info *sci, int err) |
| 2160 | { |
| 2161 | struct nilfs_segctor_wait_request *wrq, *n; |
| 2162 | unsigned long flags; |
| 2163 | |
| 2164 | spin_lock_irqsave(&sci->sc_wait_request.lock, flags); |
| 2165 | list_for_each_entry_safe(wrq, n, &sci->sc_wait_request.task_list, |
| 2166 | wq.task_list) { |
| 2167 | if (!atomic_read(&wrq->done) && |
| 2168 | nilfs_cnt32_ge(sci->sc_seq_done, wrq->seq)) { |
| 2169 | wrq->err = err; |
| 2170 | atomic_set(&wrq->done, 1); |
| 2171 | } |
| 2172 | if (atomic_read(&wrq->done)) { |
| 2173 | wrq->wq.func(&wrq->wq, |
| 2174 | TASK_UNINTERRUPTIBLE | TASK_INTERRUPTIBLE, |
| 2175 | 0, NULL); |
| 2176 | } |
| 2177 | } |
| 2178 | spin_unlock_irqrestore(&sci->sc_wait_request.lock, flags); |
| 2179 | } |
| 2180 | |
| 2181 | /** |
| 2182 | * nilfs_construct_segment - construct a logical segment |
| 2183 | * @sb: super block |
| 2184 | * |
| 2185 | * Return Value: On success, 0 is retured. On errors, one of the following |
| 2186 | * negative error code is returned. |
| 2187 | * |
| 2188 | * %-EROFS - Read only filesystem. |
| 2189 | * |
| 2190 | * %-EIO - I/O error |
| 2191 | * |
| 2192 | * %-ENOSPC - No space left on device (only in a panic state). |
| 2193 | * |
| 2194 | * %-ERESTARTSYS - Interrupted. |
| 2195 | * |
| 2196 | * %-ENOMEM - Insufficient memory available. |
| 2197 | */ |
| 2198 | int nilfs_construct_segment(struct super_block *sb) |
| 2199 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2200 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2201 | struct nilfs_sc_info *sci = nilfs->ns_writer; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2202 | struct nilfs_transaction_info *ti; |
| 2203 | int err; |
| 2204 | |
| 2205 | if (!sci) |
| 2206 | return -EROFS; |
| 2207 | |
| 2208 | /* A call inside transactions causes a deadlock. */ |
| 2209 | BUG_ON((ti = current->journal_info) && ti->ti_magic == NILFS_TI_MAGIC); |
| 2210 | |
| 2211 | err = nilfs_segctor_sync(sci); |
| 2212 | return err; |
| 2213 | } |
| 2214 | |
| 2215 | /** |
| 2216 | * nilfs_construct_dsync_segment - construct a data-only logical segment |
| 2217 | * @sb: super block |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 2218 | * @inode: inode whose data blocks should be written out |
| 2219 | * @start: start byte offset |
| 2220 | * @end: end byte offset (inclusive) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2221 | * |
| 2222 | * Return Value: On success, 0 is retured. On errors, one of the following |
| 2223 | * negative error code is returned. |
| 2224 | * |
| 2225 | * %-EROFS - Read only filesystem. |
| 2226 | * |
| 2227 | * %-EIO - I/O error |
| 2228 | * |
| 2229 | * %-ENOSPC - No space left on device (only in a panic state). |
| 2230 | * |
| 2231 | * %-ERESTARTSYS - Interrupted. |
| 2232 | * |
| 2233 | * %-ENOMEM - Insufficient memory available. |
| 2234 | */ |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 2235 | int nilfs_construct_dsync_segment(struct super_block *sb, struct inode *inode, |
| 2236 | loff_t start, loff_t end) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2237 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2238 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2239 | struct nilfs_sc_info *sci = nilfs->ns_writer; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2240 | struct nilfs_inode_info *ii; |
| 2241 | struct nilfs_transaction_info ti; |
| 2242 | int err = 0; |
| 2243 | |
| 2244 | if (!sci) |
| 2245 | return -EROFS; |
| 2246 | |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2247 | nilfs_transaction_lock(sb, &ti, 0); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2248 | |
| 2249 | ii = NILFS_I(inode); |
Andreas Rohner | b9f6614 | 2014-10-13 15:53:22 -0700 | [diff] [blame] | 2250 | if (test_bit(NILFS_I_INODE_SYNC, &ii->i_state) || |
Ryusuke Konishi | 3b2ce58 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2251 | nilfs_test_opt(nilfs, STRICT_ORDER) || |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2252 | test_bit(NILFS_SC_UNCLOSED, &sci->sc_flags) || |
Ryusuke Konishi | 3b2ce58 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2253 | nilfs_discontinued(nilfs)) { |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2254 | nilfs_transaction_unlock(sb); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2255 | err = nilfs_segctor_sync(sci); |
| 2256 | return err; |
| 2257 | } |
| 2258 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2259 | spin_lock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2260 | if (!test_bit(NILFS_I_QUEUED, &ii->i_state) && |
| 2261 | !test_bit(NILFS_I_BUSY, &ii->i_state)) { |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2262 | spin_unlock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2263 | nilfs_transaction_unlock(sb); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2264 | return 0; |
| 2265 | } |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2266 | spin_unlock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | f30bf3e | 2009-04-06 19:01:38 -0700 | [diff] [blame] | 2267 | sci->sc_dsync_inode = ii; |
| 2268 | sci->sc_dsync_start = start; |
| 2269 | sci->sc_dsync_end = end; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2270 | |
| 2271 | err = nilfs_segctor_do_construct(sci, SC_LSEG_DSYNC); |
Andreas Rohner | e2c7617 | 2014-10-13 15:53:20 -0700 | [diff] [blame] | 2272 | if (!err) |
| 2273 | nilfs->ns_flushed_device = 0; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2274 | |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2275 | nilfs_transaction_unlock(sb); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2276 | return err; |
| 2277 | } |
| 2278 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2279 | #define FLUSH_FILE_BIT (0x1) /* data file only */ |
| 2280 | #define FLUSH_DAT_BIT (1 << NILFS_DAT_INO) /* DAT only */ |
| 2281 | |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2282 | /** |
| 2283 | * nilfs_segctor_accept - record accepted sequence count of log-write requests |
| 2284 | * @sci: segment constructor object |
| 2285 | */ |
| 2286 | static void nilfs_segctor_accept(struct nilfs_sc_info *sci) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2287 | { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2288 | spin_lock(&sci->sc_state_lock); |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2289 | sci->sc_seq_accepted = sci->sc_seq_request; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2290 | spin_unlock(&sci->sc_state_lock); |
Li Hong | fdce895 | 2010-04-10 23:25:39 +0800 | [diff] [blame] | 2291 | del_timer_sync(&sci->sc_timer); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2292 | } |
| 2293 | |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2294 | /** |
| 2295 | * nilfs_segctor_notify - notify the result of request to caller threads |
| 2296 | * @sci: segment constructor object |
| 2297 | * @mode: mode of log forming |
| 2298 | * @err: error code to be notified |
| 2299 | */ |
| 2300 | 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] | 2301 | { |
| 2302 | /* Clear requests (even when the construction failed) */ |
| 2303 | spin_lock(&sci->sc_state_lock); |
| 2304 | |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2305 | if (mode == SC_LSEG_SR) { |
Ryusuke Konishi | aeda7f6 | 2009-11-02 15:08:13 +0900 | [diff] [blame] | 2306 | sci->sc_state &= ~NILFS_SEGCTOR_COMMIT; |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2307 | sci->sc_seq_done = sci->sc_seq_accepted; |
| 2308 | nilfs_segctor_wakeup(sci, err); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2309 | sci->sc_flush_request = 0; |
Ryusuke Konishi | aeda7f6 | 2009-11-02 15:08:13 +0900 | [diff] [blame] | 2310 | } else { |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2311 | if (mode == SC_FLUSH_FILE) |
Ryusuke Konishi | aeda7f6 | 2009-11-02 15:08:13 +0900 | [diff] [blame] | 2312 | sci->sc_flush_request &= ~FLUSH_FILE_BIT; |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2313 | else if (mode == SC_FLUSH_DAT) |
Ryusuke Konishi | aeda7f6 | 2009-11-02 15:08:13 +0900 | [diff] [blame] | 2314 | sci->sc_flush_request &= ~FLUSH_DAT_BIT; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2315 | |
Ryusuke Konishi | aeda7f6 | 2009-11-02 15:08:13 +0900 | [diff] [blame] | 2316 | /* re-enable timer if checkpoint creation was not done */ |
Li Hong | fdce895 | 2010-04-10 23:25:39 +0800 | [diff] [blame] | 2317 | if ((sci->sc_state & NILFS_SEGCTOR_COMMIT) && |
| 2318 | time_before(jiffies, sci->sc_timer.expires)) |
| 2319 | add_timer(&sci->sc_timer); |
Ryusuke Konishi | aeda7f6 | 2009-11-02 15:08:13 +0900 | [diff] [blame] | 2320 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2321 | spin_unlock(&sci->sc_state_lock); |
| 2322 | } |
| 2323 | |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2324 | /** |
| 2325 | * nilfs_segctor_construct - form logs and write them to disk |
| 2326 | * @sci: segment constructor object |
| 2327 | * @mode: mode of log forming |
| 2328 | */ |
| 2329 | static int nilfs_segctor_construct(struct nilfs_sc_info *sci, int mode) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2330 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2331 | struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
Jiro SEKIBA | d26493b | 2010-06-28 17:49:32 +0900 | [diff] [blame] | 2332 | struct nilfs_super_block **sbp; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2333 | int err = 0; |
| 2334 | |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2335 | nilfs_segctor_accept(sci); |
| 2336 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2337 | if (nilfs_discontinued(nilfs)) |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2338 | mode = SC_LSEG_SR; |
| 2339 | if (!nilfs_segctor_confirm(sci)) |
| 2340 | err = nilfs_segctor_do_construct(sci, mode); |
| 2341 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2342 | if (likely(!err)) { |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2343 | if (mode != SC_FLUSH_DAT) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2344 | atomic_set(&nilfs->ns_ndirtyblks, 0); |
| 2345 | if (test_bit(NILFS_SC_SUPER_ROOT, &sci->sc_flags) && |
| 2346 | nilfs_discontinued(nilfs)) { |
| 2347 | down_write(&nilfs->ns_sem); |
Jiro SEKIBA | d26493b | 2010-06-28 17:49:32 +0900 | [diff] [blame] | 2348 | err = -EIO; |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2349 | sbp = nilfs_prepare_super(sci->sc_super, |
Jiro SEKIBA | b2ac86e | 2010-06-28 17:49:33 +0900 | [diff] [blame] | 2350 | nilfs_sb_will_flip(nilfs)); |
| 2351 | if (likely(sbp)) { |
| 2352 | nilfs_set_log_cursor(sbp[0], nilfs); |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2353 | err = nilfs_commit_super(sci->sc_super, |
| 2354 | NILFS_SB_COMMIT); |
Jiro SEKIBA | b2ac86e | 2010-06-28 17:49:33 +0900 | [diff] [blame] | 2355 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2356 | up_write(&nilfs->ns_sem); |
| 2357 | } |
| 2358 | } |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2359 | |
| 2360 | nilfs_segctor_notify(sci, mode, err); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2361 | return err; |
| 2362 | } |
| 2363 | |
| 2364 | static void nilfs_construction_timeout(unsigned long data) |
| 2365 | { |
| 2366 | struct task_struct *p = (struct task_struct *)data; |
| 2367 | wake_up_process(p); |
| 2368 | } |
| 2369 | |
| 2370 | static void |
| 2371 | nilfs_remove_written_gcinodes(struct the_nilfs *nilfs, struct list_head *head) |
| 2372 | { |
| 2373 | struct nilfs_inode_info *ii, *n; |
| 2374 | |
| 2375 | list_for_each_entry_safe(ii, n, head, i_dirty) { |
| 2376 | if (!test_bit(NILFS_I_UPDATED, &ii->i_state)) |
| 2377 | continue; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2378 | list_del_init(&ii->i_dirty); |
Ryusuke Konishi | fbb24a3 | 2012-06-20 12:52:57 -0700 | [diff] [blame] | 2379 | truncate_inode_pages(&ii->vfs_inode.i_data, 0); |
| 2380 | nilfs_btnode_cache_clear(&ii->i_btnode_cache); |
Ryusuke Konishi | 263d90c | 2010-08-20 19:06:11 +0900 | [diff] [blame] | 2381 | iput(&ii->vfs_inode); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2382 | } |
| 2383 | } |
| 2384 | |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 2385 | int nilfs_clean_segments(struct super_block *sb, struct nilfs_argv *argv, |
| 2386 | void **kbufs) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2387 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2388 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2389 | struct nilfs_sc_info *sci = nilfs->ns_writer; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2390 | struct nilfs_transaction_info ti; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2391 | int err; |
| 2392 | |
| 2393 | if (unlikely(!sci)) |
| 2394 | return -EROFS; |
| 2395 | |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2396 | nilfs_transaction_lock(sb, &ti, 1); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2397 | |
Ryusuke Konishi | c1c1d7092 | 2010-08-29 12:44:56 +0900 | [diff] [blame] | 2398 | err = nilfs_mdt_save_to_shadow_map(nilfs->ns_dat); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2399 | if (unlikely(err)) |
| 2400 | goto out_unlock; |
Ryusuke Konishi | 071cb4b | 2009-05-16 23:44:55 +0900 | [diff] [blame] | 2401 | |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 2402 | err = nilfs_ioctl_prepare_clean_segments(nilfs, argv, kbufs); |
Ryusuke Konishi | c1c1d7092 | 2010-08-29 12:44:56 +0900 | [diff] [blame] | 2403 | if (unlikely(err)) { |
| 2404 | nilfs_mdt_restore_from_shadow_map(nilfs->ns_dat); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2405 | goto out_unlock; |
Ryusuke Konishi | c1c1d7092 | 2010-08-29 12:44:56 +0900 | [diff] [blame] | 2406 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2407 | |
Ryusuke Konishi | 071cb4b | 2009-05-16 23:44:55 +0900 | [diff] [blame] | 2408 | sci->sc_freesegs = kbufs[4]; |
| 2409 | sci->sc_nfreesegs = argv[4].v_nmembs; |
Ryusuke Konishi | 0935db7 | 2009-11-29 02:39:11 +0900 | [diff] [blame] | 2410 | list_splice_tail_init(&nilfs->ns_gc_inodes, &sci->sc_gc_inodes); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2411 | |
| 2412 | for (;;) { |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2413 | err = nilfs_segctor_construct(sci, SC_LSEG_SR); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2414 | nilfs_remove_written_gcinodes(nilfs, &sci->sc_gc_inodes); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2415 | |
| 2416 | if (likely(!err)) |
| 2417 | break; |
| 2418 | |
| 2419 | nilfs_warning(sb, __func__, |
| 2420 | "segment construction failed. (err=%d)", err); |
| 2421 | set_current_state(TASK_INTERRUPTIBLE); |
| 2422 | schedule_timeout(sci->sc_interval); |
| 2423 | } |
Ryusuke Konishi | 3b2ce58 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2424 | if (nilfs_test_opt(nilfs, DISCARD)) { |
Jiro SEKIBA | e902ec9 | 2010-01-30 18:06:35 +0900 | [diff] [blame] | 2425 | int ret = nilfs_discard_segments(nilfs, sci->sc_freesegs, |
| 2426 | sci->sc_nfreesegs); |
| 2427 | if (ret) { |
| 2428 | printk(KERN_WARNING |
| 2429 | "NILFS warning: error %d on discard request, " |
| 2430 | "turning discards off for the device\n", ret); |
Ryusuke Konishi | 3b2ce58 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2431 | nilfs_clear_opt(nilfs, DISCARD); |
Jiro SEKIBA | e902ec9 | 2010-01-30 18:06:35 +0900 | [diff] [blame] | 2432 | } |
| 2433 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2434 | |
| 2435 | out_unlock: |
Ryusuke Konishi | 071cb4b | 2009-05-16 23:44:55 +0900 | [diff] [blame] | 2436 | sci->sc_freesegs = NULL; |
| 2437 | sci->sc_nfreesegs = 0; |
Ryusuke Konishi | c1c1d7092 | 2010-08-29 12:44:56 +0900 | [diff] [blame] | 2438 | nilfs_mdt_clear_shadow_map(nilfs->ns_dat); |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2439 | nilfs_transaction_unlock(sb); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2440 | return err; |
| 2441 | } |
| 2442 | |
| 2443 | static void nilfs_segctor_thread_construct(struct nilfs_sc_info *sci, int mode) |
| 2444 | { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2445 | struct nilfs_transaction_info ti; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2446 | |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2447 | nilfs_transaction_lock(sci->sc_super, &ti, 0); |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2448 | nilfs_segctor_construct(sci, mode); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2449 | |
| 2450 | /* |
| 2451 | * Unclosed segment should be retried. We do this using sc_timer. |
| 2452 | * Timeout of sc_timer will invoke complete construction which leads |
| 2453 | * to close the current logical segment. |
| 2454 | */ |
| 2455 | if (test_bit(NILFS_SC_UNCLOSED, &sci->sc_flags)) |
| 2456 | nilfs_segctor_start_timer(sci); |
| 2457 | |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2458 | nilfs_transaction_unlock(sci->sc_super); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2459 | } |
| 2460 | |
| 2461 | static void nilfs_segctor_do_immediate_flush(struct nilfs_sc_info *sci) |
| 2462 | { |
| 2463 | int mode = 0; |
| 2464 | int err; |
| 2465 | |
| 2466 | spin_lock(&sci->sc_state_lock); |
| 2467 | mode = (sci->sc_flush_request & FLUSH_DAT_BIT) ? |
| 2468 | SC_FLUSH_DAT : SC_FLUSH_FILE; |
| 2469 | spin_unlock(&sci->sc_state_lock); |
| 2470 | |
| 2471 | if (mode) { |
| 2472 | err = nilfs_segctor_do_construct(sci, mode); |
| 2473 | |
| 2474 | spin_lock(&sci->sc_state_lock); |
| 2475 | sci->sc_flush_request &= (mode == SC_FLUSH_FILE) ? |
| 2476 | ~FLUSH_FILE_BIT : ~FLUSH_DAT_BIT; |
| 2477 | spin_unlock(&sci->sc_state_lock); |
| 2478 | } |
| 2479 | clear_bit(NILFS_SC_PRIOR_FLUSH, &sci->sc_flags); |
| 2480 | } |
| 2481 | |
| 2482 | static int nilfs_segctor_flush_mode(struct nilfs_sc_info *sci) |
| 2483 | { |
| 2484 | if (!test_bit(NILFS_SC_UNCLOSED, &sci->sc_flags) || |
| 2485 | time_before(jiffies, sci->sc_lseg_stime + sci->sc_mjcp_freq)) { |
| 2486 | if (!(sci->sc_flush_request & ~FLUSH_FILE_BIT)) |
| 2487 | return SC_FLUSH_FILE; |
| 2488 | else if (!(sci->sc_flush_request & ~FLUSH_DAT_BIT)) |
| 2489 | return SC_FLUSH_DAT; |
| 2490 | } |
| 2491 | return SC_LSEG_SR; |
| 2492 | } |
| 2493 | |
| 2494 | /** |
| 2495 | * nilfs_segctor_thread - main loop of the segment constructor thread. |
| 2496 | * @arg: pointer to a struct nilfs_sc_info. |
| 2497 | * |
| 2498 | * nilfs_segctor_thread() initializes a timer and serves as a daemon |
| 2499 | * to execute segment constructions. |
| 2500 | */ |
| 2501 | static int nilfs_segctor_thread(void *arg) |
| 2502 | { |
| 2503 | struct nilfs_sc_info *sci = (struct nilfs_sc_info *)arg; |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2504 | struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2505 | int timeout = 0; |
| 2506 | |
Li Hong | fdce895 | 2010-04-10 23:25:39 +0800 | [diff] [blame] | 2507 | sci->sc_timer.data = (unsigned long)current; |
| 2508 | sci->sc_timer.function = nilfs_construction_timeout; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2509 | |
| 2510 | /* start sync. */ |
| 2511 | sci->sc_task = current; |
| 2512 | wake_up(&sci->sc_wait_task); /* for nilfs_segctor_start_thread() */ |
| 2513 | printk(KERN_INFO |
| 2514 | "segctord starting. Construction interval = %lu seconds, " |
| 2515 | "CP frequency < %lu seconds\n", |
| 2516 | sci->sc_interval / HZ, sci->sc_mjcp_freq / HZ); |
| 2517 | |
| 2518 | spin_lock(&sci->sc_state_lock); |
| 2519 | loop: |
| 2520 | for (;;) { |
| 2521 | int mode; |
| 2522 | |
| 2523 | if (sci->sc_state & NILFS_SEGCTOR_QUIT) |
| 2524 | goto end_thread; |
| 2525 | |
| 2526 | if (timeout || sci->sc_seq_request != sci->sc_seq_done) |
| 2527 | mode = SC_LSEG_SR; |
| 2528 | else if (!sci->sc_flush_request) |
| 2529 | break; |
| 2530 | else |
| 2531 | mode = nilfs_segctor_flush_mode(sci); |
| 2532 | |
| 2533 | spin_unlock(&sci->sc_state_lock); |
| 2534 | nilfs_segctor_thread_construct(sci, mode); |
| 2535 | spin_lock(&sci->sc_state_lock); |
| 2536 | timeout = 0; |
| 2537 | } |
| 2538 | |
| 2539 | |
| 2540 | if (freezing(current)) { |
| 2541 | spin_unlock(&sci->sc_state_lock); |
Tejun Heo | a0acae0 | 2011-11-21 12:32:22 -0800 | [diff] [blame] | 2542 | try_to_freeze(); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2543 | spin_lock(&sci->sc_state_lock); |
| 2544 | } else { |
| 2545 | DEFINE_WAIT(wait); |
| 2546 | int should_sleep = 1; |
| 2547 | |
| 2548 | prepare_to_wait(&sci->sc_wait_daemon, &wait, |
| 2549 | TASK_INTERRUPTIBLE); |
| 2550 | |
| 2551 | if (sci->sc_seq_request != sci->sc_seq_done) |
| 2552 | should_sleep = 0; |
| 2553 | else if (sci->sc_flush_request) |
| 2554 | should_sleep = 0; |
| 2555 | else if (sci->sc_state & NILFS_SEGCTOR_COMMIT) |
| 2556 | should_sleep = time_before(jiffies, |
Li Hong | fdce895 | 2010-04-10 23:25:39 +0800 | [diff] [blame] | 2557 | sci->sc_timer.expires); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2558 | |
| 2559 | if (should_sleep) { |
| 2560 | spin_unlock(&sci->sc_state_lock); |
| 2561 | schedule(); |
| 2562 | spin_lock(&sci->sc_state_lock); |
| 2563 | } |
| 2564 | finish_wait(&sci->sc_wait_daemon, &wait); |
| 2565 | timeout = ((sci->sc_state & NILFS_SEGCTOR_COMMIT) && |
Li Hong | fdce895 | 2010-04-10 23:25:39 +0800 | [diff] [blame] | 2566 | time_after_eq(jiffies, sci->sc_timer.expires)); |
Ryusuke Konishi | e605f0a | 2009-12-09 00:57:52 +0900 | [diff] [blame] | 2567 | |
| 2568 | if (nilfs_sb_dirty(nilfs) && nilfs_sb_need_update(nilfs)) |
Jiro SEKIBA | 1dfa271 | 2009-07-23 01:33:49 +0900 | [diff] [blame] | 2569 | set_nilfs_discontinued(nilfs); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2570 | } |
| 2571 | goto loop; |
| 2572 | |
| 2573 | end_thread: |
| 2574 | spin_unlock(&sci->sc_state_lock); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2575 | |
| 2576 | /* end sync. */ |
| 2577 | sci->sc_task = NULL; |
| 2578 | wake_up(&sci->sc_wait_task); /* for nilfs_segctor_kill_thread() */ |
| 2579 | return 0; |
| 2580 | } |
| 2581 | |
| 2582 | static int nilfs_segctor_start_thread(struct nilfs_sc_info *sci) |
| 2583 | { |
| 2584 | struct task_struct *t; |
| 2585 | |
| 2586 | t = kthread_run(nilfs_segctor_thread, sci, "segctord"); |
| 2587 | if (IS_ERR(t)) { |
| 2588 | int err = PTR_ERR(t); |
| 2589 | |
| 2590 | printk(KERN_ERR "NILFS: error %d creating segctord thread\n", |
| 2591 | err); |
| 2592 | return err; |
| 2593 | } |
| 2594 | wait_event(sci->sc_wait_task, sci->sc_task != NULL); |
| 2595 | return 0; |
| 2596 | } |
| 2597 | |
| 2598 | static void nilfs_segctor_kill_thread(struct nilfs_sc_info *sci) |
Jiro SEKIBA | 6b81e14 | 2010-10-14 13:52:00 +0900 | [diff] [blame] | 2599 | __acquires(&sci->sc_state_lock) |
| 2600 | __releases(&sci->sc_state_lock) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2601 | { |
| 2602 | sci->sc_state |= NILFS_SEGCTOR_QUIT; |
| 2603 | |
| 2604 | while (sci->sc_task) { |
| 2605 | wake_up(&sci->sc_wait_daemon); |
| 2606 | spin_unlock(&sci->sc_state_lock); |
| 2607 | wait_event(sci->sc_wait_task, sci->sc_task == NULL); |
| 2608 | spin_lock(&sci->sc_state_lock); |
| 2609 | } |
| 2610 | } |
| 2611 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2612 | /* |
| 2613 | * Setup & clean-up functions |
| 2614 | */ |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2615 | static struct nilfs_sc_info *nilfs_segctor_new(struct super_block *sb, |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 2616 | struct nilfs_root *root) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2617 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2618 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2619 | struct nilfs_sc_info *sci; |
| 2620 | |
| 2621 | sci = kzalloc(sizeof(*sci), GFP_KERNEL); |
| 2622 | if (!sci) |
| 2623 | return NULL; |
| 2624 | |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2625 | sci->sc_super = sb; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2626 | |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 2627 | nilfs_get_root(root); |
| 2628 | sci->sc_root = root; |
| 2629 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2630 | init_waitqueue_head(&sci->sc_wait_request); |
| 2631 | init_waitqueue_head(&sci->sc_wait_daemon); |
| 2632 | init_waitqueue_head(&sci->sc_wait_task); |
| 2633 | spin_lock_init(&sci->sc_state_lock); |
| 2634 | INIT_LIST_HEAD(&sci->sc_dirty_files); |
| 2635 | INIT_LIST_HEAD(&sci->sc_segbufs); |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 2636 | INIT_LIST_HEAD(&sci->sc_write_logs); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2637 | INIT_LIST_HEAD(&sci->sc_gc_inodes); |
Ryusuke Konishi | 7ef3ff2 | 2015-02-05 12:25:20 -0800 | [diff] [blame] | 2638 | INIT_LIST_HEAD(&sci->sc_iput_queue); |
| 2639 | INIT_WORK(&sci->sc_iput_work, nilfs_iput_work_func); |
Li Hong | fdce895 | 2010-04-10 23:25:39 +0800 | [diff] [blame] | 2640 | init_timer(&sci->sc_timer); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2641 | |
| 2642 | sci->sc_interval = HZ * NILFS_SC_DEFAULT_TIMEOUT; |
| 2643 | sci->sc_mjcp_freq = HZ * NILFS_SC_DEFAULT_SR_FREQ; |
| 2644 | sci->sc_watermark = NILFS_SC_DEFAULT_WATERMARK; |
| 2645 | |
Ryusuke Konishi | 574e6c3 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2646 | if (nilfs->ns_interval) |
Ryusuke Konishi | 071d73c | 2011-06-10 00:33:06 +0900 | [diff] [blame] | 2647 | sci->sc_interval = HZ * nilfs->ns_interval; |
Ryusuke Konishi | 574e6c3 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2648 | if (nilfs->ns_watermark) |
| 2649 | sci->sc_watermark = nilfs->ns_watermark; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2650 | return sci; |
| 2651 | } |
| 2652 | |
| 2653 | static void nilfs_segctor_write_out(struct nilfs_sc_info *sci) |
| 2654 | { |
| 2655 | int ret, retrycount = NILFS_SC_CLEANUP_RETRY; |
| 2656 | |
| 2657 | /* The segctord thread was stopped and its timer was removed. |
| 2658 | But some tasks remain. */ |
| 2659 | do { |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2660 | struct nilfs_transaction_info ti; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2661 | |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2662 | nilfs_transaction_lock(sci->sc_super, &ti, 0); |
Ryusuke Konishi | dcd7618 | 2010-01-26 15:20:15 +0900 | [diff] [blame] | 2663 | ret = nilfs_segctor_construct(sci, SC_LSEG_SR); |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2664 | nilfs_transaction_unlock(sci->sc_super); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2665 | |
Ryusuke Konishi | 7ef3ff2 | 2015-02-05 12:25:20 -0800 | [diff] [blame] | 2666 | flush_work(&sci->sc_iput_work); |
| 2667 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2668 | } while (ret && retrycount-- > 0); |
| 2669 | } |
| 2670 | |
| 2671 | /** |
| 2672 | * nilfs_segctor_destroy - destroy the segment constructor. |
| 2673 | * @sci: nilfs_sc_info |
| 2674 | * |
| 2675 | * nilfs_segctor_destroy() kills the segctord thread and frees |
| 2676 | * the nilfs_sc_info struct. |
| 2677 | * Caller must hold the segment semaphore. |
| 2678 | */ |
| 2679 | static void nilfs_segctor_destroy(struct nilfs_sc_info *sci) |
| 2680 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2681 | struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2682 | int flag; |
| 2683 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2684 | up_write(&nilfs->ns_segctor_sem); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2685 | |
| 2686 | spin_lock(&sci->sc_state_lock); |
| 2687 | nilfs_segctor_kill_thread(sci); |
| 2688 | flag = ((sci->sc_state & NILFS_SEGCTOR_COMMIT) || sci->sc_flush_request |
| 2689 | || sci->sc_seq_request != sci->sc_seq_done); |
| 2690 | spin_unlock(&sci->sc_state_lock); |
| 2691 | |
Ryusuke Konishi | 7ef3ff2 | 2015-02-05 12:25:20 -0800 | [diff] [blame] | 2692 | if (flush_work(&sci->sc_iput_work)) |
| 2693 | flag = true; |
| 2694 | |
Ryusuke Konishi | 3256a05 | 2010-01-31 12:39:50 +0900 | [diff] [blame] | 2695 | if (flag || !nilfs_segctor_confirm(sci)) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2696 | nilfs_segctor_write_out(sci); |
| 2697 | |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2698 | if (!list_empty(&sci->sc_dirty_files)) { |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2699 | nilfs_warning(sci->sc_super, __func__, |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2700 | "dirty file(s) after the final construction\n"); |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2701 | nilfs_dispose_list(nilfs, &sci->sc_dirty_files, 1); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2702 | } |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2703 | |
Ryusuke Konishi | 7ef3ff2 | 2015-02-05 12:25:20 -0800 | [diff] [blame] | 2704 | if (!list_empty(&sci->sc_iput_queue)) { |
| 2705 | nilfs_warning(sci->sc_super, __func__, |
| 2706 | "iput queue is not empty\n"); |
| 2707 | nilfs_dispose_list(nilfs, &sci->sc_iput_queue, 1); |
| 2708 | } |
| 2709 | |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 2710 | WARN_ON(!list_empty(&sci->sc_segbufs)); |
Ryusuke Konishi | a694291a | 2009-11-29 23:03:04 +0900 | [diff] [blame] | 2711 | WARN_ON(!list_empty(&sci->sc_write_logs)); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2712 | |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 2713 | nilfs_put_root(sci->sc_root); |
| 2714 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2715 | down_write(&nilfs->ns_segctor_sem); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2716 | |
Li Hong | fdce895 | 2010-04-10 23:25:39 +0800 | [diff] [blame] | 2717 | del_timer_sync(&sci->sc_timer); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2718 | kfree(sci); |
| 2719 | } |
| 2720 | |
| 2721 | /** |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2722 | * nilfs_attach_log_writer - attach log writer |
| 2723 | * @sb: super block instance |
Ryusuke Konishi | e912a5b | 2010-08-14 13:07:15 +0900 | [diff] [blame] | 2724 | * @root: root object of the current filesystem tree |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2725 | * |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2726 | * This allocates a log writer object, initializes it, and starts the |
| 2727 | * log writer. |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2728 | * |
| 2729 | * Return Value: On success, 0 is returned. On error, one of the following |
| 2730 | * negative error code is returned. |
| 2731 | * |
| 2732 | * %-ENOMEM - Insufficient memory available. |
| 2733 | */ |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2734 | 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] | 2735 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2736 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2737 | int err; |
| 2738 | |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2739 | if (nilfs->ns_writer) { |
Ryusuke Konishi | fe5f171 | 2010-01-31 19:46:40 +0900 | [diff] [blame] | 2740 | /* |
| 2741 | * This happens if the filesystem was remounted |
| 2742 | * read/write after nilfs_error degenerated it into a |
| 2743 | * read-only mount. |
| 2744 | */ |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2745 | nilfs_detach_log_writer(sb); |
Ryusuke Konishi | fe5f171 | 2010-01-31 19:46:40 +0900 | [diff] [blame] | 2746 | } |
| 2747 | |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2748 | nilfs->ns_writer = nilfs_segctor_new(sb, root); |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2749 | if (!nilfs->ns_writer) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2750 | return -ENOMEM; |
| 2751 | |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2752 | err = nilfs_segctor_start_thread(nilfs->ns_writer); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2753 | if (err) { |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2754 | kfree(nilfs->ns_writer); |
| 2755 | nilfs->ns_writer = NULL; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2756 | } |
| 2757 | return err; |
| 2758 | } |
| 2759 | |
| 2760 | /** |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2761 | * nilfs_detach_log_writer - destroy log writer |
| 2762 | * @sb: super block instance |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2763 | * |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2764 | * This kills log writer daemon, frees the log writer object, and |
| 2765 | * destroys list of dirty files. |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2766 | */ |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2767 | void nilfs_detach_log_writer(struct super_block *sb) |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2768 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2769 | struct the_nilfs *nilfs = sb->s_fs_info; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2770 | LIST_HEAD(garbage_list); |
| 2771 | |
| 2772 | down_write(&nilfs->ns_segctor_sem); |
Ryusuke Konishi | 3fd3fe5 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2773 | if (nilfs->ns_writer) { |
| 2774 | nilfs_segctor_destroy(nilfs->ns_writer); |
| 2775 | nilfs->ns_writer = NULL; |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2776 | } |
| 2777 | |
| 2778 | /* Force to free the list of dirty files */ |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2779 | spin_lock(&nilfs->ns_inode_lock); |
| 2780 | if (!list_empty(&nilfs->ns_dirty_files)) { |
| 2781 | list_splice_init(&nilfs->ns_dirty_files, &garbage_list); |
Ryusuke Konishi | f754514 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 2782 | nilfs_warning(sb, __func__, |
| 2783 | "Hit dirty file after stopped log writer\n"); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2784 | } |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2785 | spin_unlock(&nilfs->ns_inode_lock); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2786 | up_write(&nilfs->ns_segctor_sem); |
| 2787 | |
Ryusuke Konishi | 693dd32 | 2011-03-09 11:05:07 +0900 | [diff] [blame] | 2788 | nilfs_dispose_list(nilfs, &garbage_list, 1); |
Ryusuke Konishi | 9ff05123 | 2009-04-06 19:01:37 -0700 | [diff] [blame] | 2789 | } |