David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
Steven Whitehouse | 3a8a9a1 | 2006-05-18 15:09:15 -0400 | [diff] [blame] | 3 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 4 | * |
| 5 | * This copyrighted material is made available to anyone wishing to use, |
| 6 | * modify, copy, or redistribute it subject to the terms and conditions |
Steven Whitehouse | e9fc2aa | 2006-09-01 11:05:15 -0400 | [diff] [blame] | 7 | * of the GNU General Public License version 2. |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 8 | */ |
| 9 | |
| 10 | #include <linux/sched.h> |
| 11 | #include <linux/slab.h> |
| 12 | #include <linux/spinlock.h> |
| 13 | #include <linux/completion.h> |
| 14 | #include <linux/buffer_head.h> |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 15 | #include <linux/gfs2_ondisk.h> |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 16 | #include <linux/crc32.h> |
Fabio Massimo Di Nitto | 7d30859 | 2006-09-19 07:56:29 +0200 | [diff] [blame] | 17 | #include <linux/lm_interface.h> |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 18 | |
| 19 | #include "gfs2.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 20 | #include "incore.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 21 | #include "bmap.h" |
| 22 | #include "glock.h" |
| 23 | #include "glops.h" |
| 24 | #include "lm.h" |
| 25 | #include "lops.h" |
| 26 | #include "meta_io.h" |
| 27 | #include "recovery.h" |
| 28 | #include "super.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 29 | #include "util.h" |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 30 | #include "dir.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 31 | |
| 32 | int gfs2_replay_read_block(struct gfs2_jdesc *jd, unsigned int blk, |
| 33 | struct buffer_head **bh) |
| 34 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 35 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 36 | struct gfs2_glock *gl = ip->i_gl; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 37 | int new = 0; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 38 | u64 dblock; |
| 39 | u32 extlen; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 40 | int error; |
| 41 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 42 | error = gfs2_extent_map(&ip->i_inode, blk, &new, &dblock, &extlen); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 43 | if (error) |
| 44 | return error; |
| 45 | if (!dblock) { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 46 | gfs2_consist_inode(ip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 47 | return -EIO; |
| 48 | } |
| 49 | |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 50 | *bh = gfs2_meta_ra(gl, dblock, extlen); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 51 | |
| 52 | return error; |
| 53 | } |
| 54 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 55 | int gfs2_revoke_add(struct gfs2_sbd *sdp, u64 blkno, unsigned int where) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 56 | { |
| 57 | struct list_head *head = &sdp->sd_revoke_list; |
| 58 | struct gfs2_revoke_replay *rr; |
| 59 | int found = 0; |
| 60 | |
| 61 | list_for_each_entry(rr, head, rr_list) { |
| 62 | if (rr->rr_blkno == blkno) { |
| 63 | found = 1; |
| 64 | break; |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | if (found) { |
| 69 | rr->rr_where = where; |
| 70 | return 0; |
| 71 | } |
| 72 | |
| 73 | rr = kmalloc(sizeof(struct gfs2_revoke_replay), GFP_KERNEL); |
| 74 | if (!rr) |
| 75 | return -ENOMEM; |
| 76 | |
| 77 | rr->rr_blkno = blkno; |
| 78 | rr->rr_where = where; |
| 79 | list_add(&rr->rr_list, head); |
| 80 | |
| 81 | return 1; |
| 82 | } |
| 83 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 84 | int gfs2_revoke_check(struct gfs2_sbd *sdp, u64 blkno, unsigned int where) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 85 | { |
| 86 | struct gfs2_revoke_replay *rr; |
| 87 | int wrap, a, b, revoke; |
| 88 | int found = 0; |
| 89 | |
| 90 | list_for_each_entry(rr, &sdp->sd_revoke_list, rr_list) { |
| 91 | if (rr->rr_blkno == blkno) { |
| 92 | found = 1; |
| 93 | break; |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | if (!found) |
| 98 | return 0; |
| 99 | |
| 100 | wrap = (rr->rr_where < sdp->sd_replay_tail); |
| 101 | a = (sdp->sd_replay_tail < where); |
| 102 | b = (where < rr->rr_where); |
| 103 | revoke = (wrap) ? (a || b) : (a && b); |
| 104 | |
| 105 | return revoke; |
| 106 | } |
| 107 | |
| 108 | void gfs2_revoke_clean(struct gfs2_sbd *sdp) |
| 109 | { |
| 110 | struct list_head *head = &sdp->sd_revoke_list; |
| 111 | struct gfs2_revoke_replay *rr; |
| 112 | |
| 113 | while (!list_empty(head)) { |
| 114 | rr = list_entry(head->next, struct gfs2_revoke_replay, rr_list); |
| 115 | list_del(&rr->rr_list); |
| 116 | kfree(rr); |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | /** |
| 121 | * get_log_header - read the log header for a given segment |
| 122 | * @jd: the journal |
| 123 | * @blk: the block to look at |
| 124 | * @lh: the log header to return |
| 125 | * |
| 126 | * Read the log header for a given segement in a given journal. Do a few |
| 127 | * sanity checks on it. |
| 128 | * |
| 129 | * Returns: 0 on success, |
| 130 | * 1 if the header was invalid or incomplete, |
| 131 | * errno on error |
| 132 | */ |
| 133 | |
| 134 | static int get_log_header(struct gfs2_jdesc *jd, unsigned int blk, |
Al Viro | 5516762 | 2006-10-13 21:47:13 -0400 | [diff] [blame] | 135 | struct gfs2_log_header_host *head) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 136 | { |
| 137 | struct buffer_head *bh; |
Al Viro | 5516762 | 2006-10-13 21:47:13 -0400 | [diff] [blame] | 138 | struct gfs2_log_header_host lh; |
Steven Whitehouse | 887bc5d | 2006-12-05 13:34:17 -0500 | [diff] [blame] | 139 | const u32 nothing = 0; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 140 | u32 hash; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 141 | int error; |
| 142 | |
| 143 | error = gfs2_replay_read_block(jd, blk, &bh); |
| 144 | if (error) |
| 145 | return error; |
| 146 | |
Steven Whitehouse | 2a2c982 | 2006-10-31 14:44:50 -0500 | [diff] [blame] | 147 | hash = crc32_le((u32)~0, bh->b_data, sizeof(struct gfs2_log_header) - |
| 148 | sizeof(u32)); |
| 149 | hash = crc32_le(hash, (unsigned char const *)¬hing, sizeof(nothing)); |
| 150 | hash ^= (u32)~0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 151 | gfs2_log_header_in(&lh, bh->b_data); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 152 | brelse(bh); |
| 153 | |
| 154 | if (lh.lh_header.mh_magic != GFS2_MAGIC || |
| 155 | lh.lh_header.mh_type != GFS2_METATYPE_LH || |
Steven Whitehouse | 59a1cc6 | 2006-08-04 15:41:22 -0400 | [diff] [blame] | 156 | lh.lh_blkno != blk || lh.lh_hash != hash) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 157 | return 1; |
| 158 | |
| 159 | *head = lh; |
| 160 | |
| 161 | return 0; |
| 162 | } |
| 163 | |
| 164 | /** |
| 165 | * find_good_lh - find a good log header |
| 166 | * @jd: the journal |
| 167 | * @blk: the segment to start searching from |
| 168 | * @lh: the log header to fill in |
| 169 | * @forward: if true search forward in the log, else search backward |
| 170 | * |
| 171 | * Call get_log_header() to get a log header for a segment, but if the |
| 172 | * segment is bad, either scan forward or backward until we find a good one. |
| 173 | * |
| 174 | * Returns: errno |
| 175 | */ |
| 176 | |
| 177 | static int find_good_lh(struct gfs2_jdesc *jd, unsigned int *blk, |
Al Viro | 5516762 | 2006-10-13 21:47:13 -0400 | [diff] [blame] | 178 | struct gfs2_log_header_host *head) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 179 | { |
| 180 | unsigned int orig_blk = *blk; |
| 181 | int error; |
| 182 | |
| 183 | for (;;) { |
| 184 | error = get_log_header(jd, *blk, head); |
| 185 | if (error <= 0) |
| 186 | return error; |
| 187 | |
| 188 | if (++*blk == jd->jd_blocks) |
| 189 | *blk = 0; |
| 190 | |
| 191 | if (*blk == orig_blk) { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 192 | gfs2_consist_inode(GFS2_I(jd->jd_inode)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 193 | return -EIO; |
| 194 | } |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | /** |
| 199 | * jhead_scan - make sure we've found the head of the log |
| 200 | * @jd: the journal |
| 201 | * @head: this is filled in with the log descriptor of the head |
| 202 | * |
| 203 | * At this point, seg and lh should be either the head of the log or just |
| 204 | * before. Scan forward until we find the head. |
| 205 | * |
| 206 | * Returns: errno |
| 207 | */ |
| 208 | |
Al Viro | 5516762 | 2006-10-13 21:47:13 -0400 | [diff] [blame] | 209 | static int jhead_scan(struct gfs2_jdesc *jd, struct gfs2_log_header_host *head) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 210 | { |
| 211 | unsigned int blk = head->lh_blkno; |
Al Viro | 5516762 | 2006-10-13 21:47:13 -0400 | [diff] [blame] | 212 | struct gfs2_log_header_host lh; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 213 | int error; |
| 214 | |
| 215 | for (;;) { |
| 216 | if (++blk == jd->jd_blocks) |
| 217 | blk = 0; |
| 218 | |
| 219 | error = get_log_header(jd, blk, &lh); |
| 220 | if (error < 0) |
| 221 | return error; |
| 222 | if (error == 1) |
| 223 | continue; |
| 224 | |
| 225 | if (lh.lh_sequence == head->lh_sequence) { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 226 | gfs2_consist_inode(GFS2_I(jd->jd_inode)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 227 | return -EIO; |
| 228 | } |
| 229 | if (lh.lh_sequence < head->lh_sequence) |
| 230 | break; |
| 231 | |
| 232 | *head = lh; |
| 233 | } |
| 234 | |
| 235 | return 0; |
| 236 | } |
| 237 | |
| 238 | /** |
| 239 | * gfs2_find_jhead - find the head of a log |
| 240 | * @jd: the journal |
| 241 | * @head: the log descriptor for the head of the log is returned here |
| 242 | * |
| 243 | * Do a binary search of a journal and find the valid log entry with the |
| 244 | * highest sequence number. (i.e. the log head) |
| 245 | * |
| 246 | * Returns: errno |
| 247 | */ |
| 248 | |
Al Viro | 5516762 | 2006-10-13 21:47:13 -0400 | [diff] [blame] | 249 | int gfs2_find_jhead(struct gfs2_jdesc *jd, struct gfs2_log_header_host *head) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 250 | { |
Al Viro | 5516762 | 2006-10-13 21:47:13 -0400 | [diff] [blame] | 251 | struct gfs2_log_header_host lh_1, lh_m; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 252 | u32 blk_1, blk_2, blk_m; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 253 | int error; |
| 254 | |
| 255 | blk_1 = 0; |
| 256 | blk_2 = jd->jd_blocks - 1; |
| 257 | |
| 258 | for (;;) { |
| 259 | blk_m = (blk_1 + blk_2) / 2; |
| 260 | |
| 261 | error = find_good_lh(jd, &blk_1, &lh_1); |
| 262 | if (error) |
| 263 | return error; |
| 264 | |
| 265 | error = find_good_lh(jd, &blk_m, &lh_m); |
| 266 | if (error) |
| 267 | return error; |
| 268 | |
| 269 | if (blk_1 == blk_m || blk_m == blk_2) |
| 270 | break; |
| 271 | |
| 272 | if (lh_1.lh_sequence <= lh_m.lh_sequence) |
| 273 | blk_1 = blk_m; |
| 274 | else |
| 275 | blk_2 = blk_m; |
| 276 | } |
| 277 | |
| 278 | error = jhead_scan(jd, &lh_1); |
| 279 | if (error) |
| 280 | return error; |
| 281 | |
| 282 | *head = lh_1; |
| 283 | |
| 284 | return error; |
| 285 | } |
| 286 | |
| 287 | /** |
| 288 | * foreach_descriptor - go through the active part of the log |
| 289 | * @jd: the journal |
| 290 | * @start: the first log header in the active region |
| 291 | * @end: the last log header (don't process the contents of this entry)) |
| 292 | * |
| 293 | * Call a given function once for every log descriptor in the active |
| 294 | * portion of the log. |
| 295 | * |
| 296 | * Returns: errno |
| 297 | */ |
| 298 | |
| 299 | static int foreach_descriptor(struct gfs2_jdesc *jd, unsigned int start, |
| 300 | unsigned int end, int pass) |
| 301 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 302 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 303 | struct buffer_head *bh; |
| 304 | struct gfs2_log_descriptor *ld; |
| 305 | int error = 0; |
| 306 | u32 length; |
| 307 | __be64 *ptr; |
| 308 | unsigned int offset = sizeof(struct gfs2_log_descriptor); |
Steven Whitehouse | a67cdbd | 2006-09-05 14:41:30 -0400 | [diff] [blame] | 309 | offset += sizeof(__be64) - 1; |
| 310 | offset &= ~(sizeof(__be64) - 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 311 | |
| 312 | while (start != end) { |
| 313 | error = gfs2_replay_read_block(jd, start, &bh); |
| 314 | if (error) |
| 315 | return error; |
| 316 | if (gfs2_meta_check(sdp, bh)) { |
| 317 | brelse(bh); |
| 318 | return -EIO; |
| 319 | } |
| 320 | ld = (struct gfs2_log_descriptor *)bh->b_data; |
| 321 | length = be32_to_cpu(ld->ld_length); |
| 322 | |
Steven Whitehouse | e3167de | 2006-03-30 15:46:23 -0500 | [diff] [blame] | 323 | if (be32_to_cpu(ld->ld_header.mh_type) == GFS2_METATYPE_LH) { |
Al Viro | 5516762 | 2006-10-13 21:47:13 -0400 | [diff] [blame] | 324 | struct gfs2_log_header_host lh; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 325 | error = get_log_header(jd, start, &lh); |
| 326 | if (!error) { |
| 327 | gfs2_replay_incr_blk(sdp, &start); |
Russell Cattelan | 8872187 | 2006-08-10 11:08:40 -0500 | [diff] [blame] | 328 | brelse(bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 329 | continue; |
| 330 | } |
| 331 | if (error == 1) { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 332 | gfs2_consist_inode(GFS2_I(jd->jd_inode)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 333 | error = -EIO; |
| 334 | } |
| 335 | brelse(bh); |
| 336 | return error; |
| 337 | } else if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LD)) { |
| 338 | brelse(bh); |
| 339 | return -EIO; |
| 340 | } |
| 341 | ptr = (__be64 *)(bh->b_data + offset); |
| 342 | error = lops_scan_elements(jd, start, ld, ptr, pass); |
| 343 | if (error) { |
| 344 | brelse(bh); |
| 345 | return error; |
| 346 | } |
| 347 | |
| 348 | while (length--) |
| 349 | gfs2_replay_incr_blk(sdp, &start); |
| 350 | |
| 351 | brelse(bh); |
| 352 | } |
| 353 | |
| 354 | return 0; |
| 355 | } |
| 356 | |
| 357 | /** |
| 358 | * clean_journal - mark a dirty journal as being clean |
| 359 | * @sdp: the filesystem |
| 360 | * @jd: the journal |
| 361 | * @gl: the journal's glock |
| 362 | * @head: the head journal to start from |
| 363 | * |
| 364 | * Returns: errno |
| 365 | */ |
| 366 | |
Al Viro | 5516762 | 2006-10-13 21:47:13 -0400 | [diff] [blame] | 367 | static int clean_journal(struct gfs2_jdesc *jd, struct gfs2_log_header_host *head) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 368 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 369 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
| 370 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 371 | unsigned int lblock; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 372 | struct gfs2_log_header *lh; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 373 | u32 hash; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 374 | struct buffer_head *bh; |
| 375 | int error; |
Steven Whitehouse | 2359125 | 2006-10-13 17:25:45 -0400 | [diff] [blame] | 376 | struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 }; |
Steven Whitehouse | fd88de56 | 2006-05-05 16:59:11 -0400 | [diff] [blame] | 377 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 378 | lblock = head->lh_blkno; |
| 379 | gfs2_replay_incr_blk(sdp, &lblock); |
Steven Whitehouse | 2359125 | 2006-10-13 17:25:45 -0400 | [diff] [blame] | 380 | bh_map.b_size = 1 << ip->i_inode.i_blkbits; |
| 381 | error = gfs2_block_map(&ip->i_inode, lblock, 0, &bh_map); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 382 | if (error) |
| 383 | return error; |
Steven Whitehouse | 7a6bbac | 2006-09-18 17:18:23 -0400 | [diff] [blame] | 384 | if (!bh_map.b_blocknr) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 385 | gfs2_consist_inode(ip); |
| 386 | return -EIO; |
| 387 | } |
| 388 | |
Steven Whitehouse | 7a6bbac | 2006-09-18 17:18:23 -0400 | [diff] [blame] | 389 | bh = sb_getblk(sdp->sd_vfs, bh_map.b_blocknr); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 390 | lock_buffer(bh); |
| 391 | memset(bh->b_data, 0, bh->b_size); |
| 392 | set_buffer_uptodate(bh); |
| 393 | clear_buffer_dirty(bh); |
| 394 | unlock_buffer(bh); |
| 395 | |
| 396 | lh = (struct gfs2_log_header *)bh->b_data; |
| 397 | memset(lh, 0, sizeof(struct gfs2_log_header)); |
| 398 | lh->lh_header.mh_magic = cpu_to_be32(GFS2_MAGIC); |
Russell Cattelan | 8872187 | 2006-08-10 11:08:40 -0500 | [diff] [blame] | 399 | lh->lh_header.mh_type = cpu_to_be32(GFS2_METATYPE_LH); |
Steven Whitehouse | e3167de | 2006-03-30 15:46:23 -0500 | [diff] [blame] | 400 | lh->lh_header.mh_format = cpu_to_be32(GFS2_FORMAT_LH); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 401 | lh->lh_sequence = cpu_to_be64(head->lh_sequence + 1); |
| 402 | lh->lh_flags = cpu_to_be32(GFS2_LOG_HEAD_UNMOUNT); |
| 403 | lh->lh_blkno = cpu_to_be32(lblock); |
| 404 | hash = gfs2_disk_hash((const char *)lh, sizeof(struct gfs2_log_header)); |
| 405 | lh->lh_hash = cpu_to_be32(hash); |
| 406 | |
| 407 | set_buffer_dirty(bh); |
| 408 | if (sync_dirty_buffer(bh)) |
| 409 | gfs2_io_error_bh(sdp, bh); |
| 410 | brelse(bh); |
| 411 | |
| 412 | return error; |
| 413 | } |
| 414 | |
| 415 | /** |
| 416 | * gfs2_recover_journal - recovery a given journal |
| 417 | * @jd: the struct gfs2_jdesc describing the journal |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 418 | * |
| 419 | * Acquire the journal's lock, check to see if the journal is clean, and |
| 420 | * do recovery if necessary. |
| 421 | * |
| 422 | * Returns: errno |
| 423 | */ |
| 424 | |
David Teigland | c63e31c | 2006-04-20 17:03:48 -0400 | [diff] [blame] | 425 | int gfs2_recover_journal(struct gfs2_jdesc *jd) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 426 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 427 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
| 428 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
Al Viro | 5516762 | 2006-10-13 21:47:13 -0400 | [diff] [blame] | 429 | struct gfs2_log_header_host head; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 430 | struct gfs2_holder j_gh, ji_gh, t_gh; |
| 431 | unsigned long t; |
| 432 | int ro = 0; |
| 433 | unsigned int pass; |
| 434 | int error; |
| 435 | |
Steven Whitehouse | 5965b1f | 2006-04-26 13:21:55 -0400 | [diff] [blame] | 436 | if (jd->jd_jid != sdp->sd_lockstruct.ls_jid) { |
| 437 | fs_info(sdp, "jid=%u: Trying to acquire journal lock...\n", |
| 438 | jd->jd_jid); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 439 | |
Steven Whitehouse | 5965b1f | 2006-04-26 13:21:55 -0400 | [diff] [blame] | 440 | /* Aquire the journal lock so we can do recovery */ |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 441 | |
Steven Whitehouse | 5965b1f | 2006-04-26 13:21:55 -0400 | [diff] [blame] | 442 | error = gfs2_glock_nq_num(sdp, jd->jd_jid, &gfs2_journal_glops, |
| 443 | LM_ST_EXCLUSIVE, |
| 444 | LM_FLAG_NOEXP | LM_FLAG_TRY | GL_NOCACHE, |
| 445 | &j_gh); |
| 446 | switch (error) { |
| 447 | case 0: |
| 448 | break; |
Steven Whitehouse | 907b9bc | 2006-09-25 09:26:04 -0400 | [diff] [blame] | 449 | |
Steven Whitehouse | 5965b1f | 2006-04-26 13:21:55 -0400 | [diff] [blame] | 450 | case GLR_TRYFAILED: |
| 451 | fs_info(sdp, "jid=%u: Busy\n", jd->jd_jid); |
| 452 | error = 0; |
Steven Whitehouse | 907b9bc | 2006-09-25 09:26:04 -0400 | [diff] [blame] | 453 | |
Steven Whitehouse | 5965b1f | 2006-04-26 13:21:55 -0400 | [diff] [blame] | 454 | default: |
| 455 | goto fail; |
| 456 | }; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 457 | |
Steven Whitehouse | 5965b1f | 2006-04-26 13:21:55 -0400 | [diff] [blame] | 458 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, |
| 459 | LM_FLAG_NOEXP, &ji_gh); |
| 460 | if (error) |
| 461 | goto fail_gunlock_j; |
| 462 | } else { |
| 463 | fs_info(sdp, "jid=%u, already locked for use\n", jd->jd_jid); |
| 464 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 465 | |
| 466 | fs_info(sdp, "jid=%u: Looking at journal...\n", jd->jd_jid); |
| 467 | |
| 468 | error = gfs2_jdesc_check(jd); |
| 469 | if (error) |
| 470 | goto fail_gunlock_ji; |
| 471 | |
| 472 | error = gfs2_find_jhead(jd, &head); |
| 473 | if (error) |
| 474 | goto fail_gunlock_ji; |
| 475 | |
| 476 | if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { |
| 477 | fs_info(sdp, "jid=%u: Acquiring the transaction lock...\n", |
| 478 | jd->jd_jid); |
| 479 | |
| 480 | t = jiffies; |
| 481 | |
| 482 | /* Acquire a shared hold on the transaction lock */ |
| 483 | |
Steven Whitehouse | 59a1cc6 | 2006-08-04 15:41:22 -0400 | [diff] [blame] | 484 | error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, |
Steven Whitehouse | 5965b1f | 2006-04-26 13:21:55 -0400 | [diff] [blame] | 485 | LM_FLAG_NOEXP | LM_FLAG_PRIORITY | |
Steven Whitehouse | 59a1cc6 | 2006-08-04 15:41:22 -0400 | [diff] [blame] | 486 | GL_NOCANCEL | GL_NOCACHE, &t_gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 487 | if (error) |
| 488 | goto fail_gunlock_ji; |
| 489 | |
| 490 | if (test_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags)) { |
| 491 | if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) |
| 492 | ro = 1; |
| 493 | } else { |
| 494 | if (sdp->sd_vfs->s_flags & MS_RDONLY) |
| 495 | ro = 1; |
| 496 | } |
| 497 | |
| 498 | if (ro) { |
| 499 | fs_warn(sdp, "jid=%u: Can't replay: read-only FS\n", |
| 500 | jd->jd_jid); |
| 501 | error = -EROFS; |
| 502 | goto fail_gunlock_tr; |
| 503 | } |
| 504 | |
| 505 | fs_info(sdp, "jid=%u: Replaying journal...\n", jd->jd_jid); |
| 506 | |
| 507 | for (pass = 0; pass < 2; pass++) { |
| 508 | lops_before_scan(jd, &head, pass); |
| 509 | error = foreach_descriptor(jd, head.lh_tail, |
| 510 | head.lh_blkno, pass); |
| 511 | lops_after_scan(jd, error, pass); |
| 512 | if (error) |
| 513 | goto fail_gunlock_tr; |
| 514 | } |
| 515 | |
| 516 | error = clean_journal(jd, &head); |
| 517 | if (error) |
| 518 | goto fail_gunlock_tr; |
| 519 | |
| 520 | gfs2_glock_dq_uninit(&t_gh); |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 521 | t = DIV_ROUND_UP(jiffies - t, HZ); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 522 | fs_info(sdp, "jid=%u: Journal replayed in %lus\n", |
| 523 | jd->jd_jid, t); |
| 524 | } |
| 525 | |
Steven Whitehouse | 5965b1f | 2006-04-26 13:21:55 -0400 | [diff] [blame] | 526 | if (jd->jd_jid != sdp->sd_lockstruct.ls_jid) |
| 527 | gfs2_glock_dq_uninit(&ji_gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 528 | |
| 529 | gfs2_lm_recovery_done(sdp, jd->jd_jid, LM_RD_SUCCESS); |
| 530 | |
Steven Whitehouse | 5965b1f | 2006-04-26 13:21:55 -0400 | [diff] [blame] | 531 | if (jd->jd_jid != sdp->sd_lockstruct.ls_jid) |
| 532 | gfs2_glock_dq_uninit(&j_gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 533 | |
| 534 | fs_info(sdp, "jid=%u: Done\n", jd->jd_jid); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 535 | return 0; |
| 536 | |
Steven Whitehouse | 5965b1f | 2006-04-26 13:21:55 -0400 | [diff] [blame] | 537 | fail_gunlock_tr: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 538 | gfs2_glock_dq_uninit(&t_gh); |
Steven Whitehouse | 5965b1f | 2006-04-26 13:21:55 -0400 | [diff] [blame] | 539 | fail_gunlock_ji: |
| 540 | if (jd->jd_jid != sdp->sd_lockstruct.ls_jid) { |
| 541 | gfs2_glock_dq_uninit(&ji_gh); |
| 542 | fail_gunlock_j: |
| 543 | gfs2_glock_dq_uninit(&j_gh); |
| 544 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 545 | |
| 546 | fs_info(sdp, "jid=%u: %s\n", jd->jd_jid, (error) ? "Failed" : "Done"); |
| 547 | |
Steven Whitehouse | 5965b1f | 2006-04-26 13:21:55 -0400 | [diff] [blame] | 548 | fail: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 549 | gfs2_lm_recovery_done(sdp, jd->jd_jid, LM_RD_GAVEUP); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 550 | return error; |
| 551 | } |
| 552 | |
| 553 | /** |
| 554 | * gfs2_check_journals - Recover any dirty journals |
| 555 | * @sdp: the filesystem |
| 556 | * |
| 557 | */ |
| 558 | |
| 559 | void gfs2_check_journals(struct gfs2_sbd *sdp) |
| 560 | { |
| 561 | struct gfs2_jdesc *jd; |
| 562 | |
| 563 | for (;;) { |
| 564 | jd = gfs2_jdesc_find_dirty(sdp); |
| 565 | if (!jd) |
| 566 | break; |
| 567 | |
| 568 | if (jd != sdp->sd_jdesc) |
David Teigland | c63e31c | 2006-04-20 17:03:48 -0400 | [diff] [blame] | 569 | gfs2_recover_journal(jd); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 570 | } |
| 571 | } |
| 572 | |