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1da177e4 | 1 | /* |
87c199c2 | 2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
7b718769 | 3 | * All Rights Reserved. |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_fs.h" |
70a9883c | 20 | #include "xfs_shared.h" |
239880ef DC |
21 | #include "xfs_format.h" |
22 | #include "xfs_log_format.h" | |
23 | #include "xfs_trans_resv.h" | |
a844f451 | 24 | #include "xfs_bit.h" |
a844f451 | 25 | #include "xfs_inum.h" |
a844f451 NS |
26 | #include "xfs_sb.h" |
27 | #include "xfs_ag.h" | |
1da177e4 | 28 | #include "xfs_mount.h" |
57062787 | 29 | #include "xfs_da_format.h" |
1da177e4 LT |
30 | #include "xfs_error.h" |
31 | #include "xfs_bmap_btree.h" | |
a844f451 NS |
32 | #include "xfs_alloc_btree.h" |
33 | #include "xfs_ialloc_btree.h" | |
ee1a47ab | 34 | #include "xfs_btree.h" |
1da177e4 | 35 | #include "xfs_dinode.h" |
1da177e4 | 36 | #include "xfs_inode.h" |
239880ef | 37 | #include "xfs_trans.h" |
a844f451 | 38 | #include "xfs_inode_item.h" |
a844f451 | 39 | #include "xfs_alloc.h" |
1da177e4 | 40 | #include "xfs_ialloc.h" |
239880ef | 41 | #include "xfs_log.h" |
1da177e4 | 42 | #include "xfs_log_priv.h" |
1da177e4 LT |
43 | #include "xfs_log_recover.h" |
44 | #include "xfs_extfree_item.h" | |
45 | #include "xfs_trans_priv.h" | |
1da177e4 | 46 | #include "xfs_quota.h" |
0e446be4 | 47 | #include "xfs_cksum.h" |
0b1b213f | 48 | #include "xfs_trace.h" |
33479e05 | 49 | #include "xfs_icache.h" |
d75afeb3 DC |
50 | |
51 | /* Need all the magic numbers and buffer ops structures from these headers */ | |
d75afeb3 | 52 | #include "xfs_da_btree.h" |
2b9ab5ab | 53 | #include "xfs_dir2.h" |
1da177e4 | 54 | |
fc06c6d0 DC |
55 | #define BLK_AVG(blk1, blk2) ((blk1+blk2) >> 1) |
56 | ||
9a8d2fdb MT |
57 | STATIC int |
58 | xlog_find_zeroed( | |
59 | struct xlog *, | |
60 | xfs_daddr_t *); | |
61 | STATIC int | |
62 | xlog_clear_stale_blocks( | |
63 | struct xlog *, | |
64 | xfs_lsn_t); | |
1da177e4 | 65 | #if defined(DEBUG) |
9a8d2fdb MT |
66 | STATIC void |
67 | xlog_recover_check_summary( | |
68 | struct xlog *); | |
1da177e4 LT |
69 | #else |
70 | #define xlog_recover_check_summary(log) | |
1da177e4 LT |
71 | #endif |
72 | ||
d5689eaa CH |
73 | /* |
74 | * This structure is used during recovery to record the buf log items which | |
75 | * have been canceled and should not be replayed. | |
76 | */ | |
77 | struct xfs_buf_cancel { | |
78 | xfs_daddr_t bc_blkno; | |
79 | uint bc_len; | |
80 | int bc_refcount; | |
81 | struct list_head bc_list; | |
82 | }; | |
83 | ||
1da177e4 LT |
84 | /* |
85 | * Sector aligned buffer routines for buffer create/read/write/access | |
86 | */ | |
87 | ||
ff30a622 AE |
88 | /* |
89 | * Verify the given count of basic blocks is valid number of blocks | |
90 | * to specify for an operation involving the given XFS log buffer. | |
91 | * Returns nonzero if the count is valid, 0 otherwise. | |
92 | */ | |
93 | ||
94 | static inline int | |
95 | xlog_buf_bbcount_valid( | |
9a8d2fdb | 96 | struct xlog *log, |
ff30a622 AE |
97 | int bbcount) |
98 | { | |
99 | return bbcount > 0 && bbcount <= log->l_logBBsize; | |
100 | } | |
101 | ||
36adecff AE |
102 | /* |
103 | * Allocate a buffer to hold log data. The buffer needs to be able | |
104 | * to map to a range of nbblks basic blocks at any valid (basic | |
105 | * block) offset within the log. | |
106 | */ | |
5d77c0dc | 107 | STATIC xfs_buf_t * |
1da177e4 | 108 | xlog_get_bp( |
9a8d2fdb | 109 | struct xlog *log, |
3228149c | 110 | int nbblks) |
1da177e4 | 111 | { |
c8da0faf CH |
112 | struct xfs_buf *bp; |
113 | ||
ff30a622 | 114 | if (!xlog_buf_bbcount_valid(log, nbblks)) { |
a0fa2b67 | 115 | xfs_warn(log->l_mp, "Invalid block length (0x%x) for buffer", |
ff30a622 AE |
116 | nbblks); |
117 | XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp); | |
3228149c DC |
118 | return NULL; |
119 | } | |
1da177e4 | 120 | |
36adecff AE |
121 | /* |
122 | * We do log I/O in units of log sectors (a power-of-2 | |
123 | * multiple of the basic block size), so we round up the | |
25985edc | 124 | * requested size to accommodate the basic blocks required |
36adecff AE |
125 | * for complete log sectors. |
126 | * | |
127 | * In addition, the buffer may be used for a non-sector- | |
128 | * aligned block offset, in which case an I/O of the | |
129 | * requested size could extend beyond the end of the | |
130 | * buffer. If the requested size is only 1 basic block it | |
131 | * will never straddle a sector boundary, so this won't be | |
132 | * an issue. Nor will this be a problem if the log I/O is | |
133 | * done in basic blocks (sector size 1). But otherwise we | |
134 | * extend the buffer by one extra log sector to ensure | |
25985edc | 135 | * there's space to accommodate this possibility. |
36adecff | 136 | */ |
69ce58f0 AE |
137 | if (nbblks > 1 && log->l_sectBBsize > 1) |
138 | nbblks += log->l_sectBBsize; | |
139 | nbblks = round_up(nbblks, log->l_sectBBsize); | |
36adecff | 140 | |
e70b73f8 | 141 | bp = xfs_buf_get_uncached(log->l_mp->m_logdev_targp, nbblks, 0); |
c8da0faf CH |
142 | if (bp) |
143 | xfs_buf_unlock(bp); | |
144 | return bp; | |
1da177e4 LT |
145 | } |
146 | ||
5d77c0dc | 147 | STATIC void |
1da177e4 LT |
148 | xlog_put_bp( |
149 | xfs_buf_t *bp) | |
150 | { | |
151 | xfs_buf_free(bp); | |
152 | } | |
153 | ||
48389ef1 AE |
154 | /* |
155 | * Return the address of the start of the given block number's data | |
156 | * in a log buffer. The buffer covers a log sector-aligned region. | |
157 | */ | |
076e6acb CH |
158 | STATIC xfs_caddr_t |
159 | xlog_align( | |
9a8d2fdb | 160 | struct xlog *log, |
076e6acb CH |
161 | xfs_daddr_t blk_no, |
162 | int nbblks, | |
9a8d2fdb | 163 | struct xfs_buf *bp) |
076e6acb | 164 | { |
fdc07f44 | 165 | xfs_daddr_t offset = blk_no & ((xfs_daddr_t)log->l_sectBBsize - 1); |
076e6acb | 166 | |
4e94b71b | 167 | ASSERT(offset + nbblks <= bp->b_length); |
62926044 | 168 | return bp->b_addr + BBTOB(offset); |
076e6acb CH |
169 | } |
170 | ||
1da177e4 LT |
171 | |
172 | /* | |
173 | * nbblks should be uint, but oh well. Just want to catch that 32-bit length. | |
174 | */ | |
076e6acb CH |
175 | STATIC int |
176 | xlog_bread_noalign( | |
9a8d2fdb | 177 | struct xlog *log, |
1da177e4 LT |
178 | xfs_daddr_t blk_no, |
179 | int nbblks, | |
9a8d2fdb | 180 | struct xfs_buf *bp) |
1da177e4 LT |
181 | { |
182 | int error; | |
183 | ||
ff30a622 | 184 | if (!xlog_buf_bbcount_valid(log, nbblks)) { |
a0fa2b67 | 185 | xfs_warn(log->l_mp, "Invalid block length (0x%x) for buffer", |
ff30a622 AE |
186 | nbblks); |
187 | XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp); | |
3228149c DC |
188 | return EFSCORRUPTED; |
189 | } | |
190 | ||
69ce58f0 AE |
191 | blk_no = round_down(blk_no, log->l_sectBBsize); |
192 | nbblks = round_up(nbblks, log->l_sectBBsize); | |
1da177e4 LT |
193 | |
194 | ASSERT(nbblks > 0); | |
4e94b71b | 195 | ASSERT(nbblks <= bp->b_length); |
1da177e4 LT |
196 | |
197 | XFS_BUF_SET_ADDR(bp, log->l_logBBstart + blk_no); | |
198 | XFS_BUF_READ(bp); | |
aa0e8833 | 199 | bp->b_io_length = nbblks; |
0e95f19a | 200 | bp->b_error = 0; |
1da177e4 LT |
201 | |
202 | xfsbdstrat(log->l_mp, bp); | |
1a1a3e97 | 203 | error = xfs_buf_iowait(bp); |
d64e31a2 | 204 | if (error) |
901796af | 205 | xfs_buf_ioerror_alert(bp, __func__); |
1da177e4 LT |
206 | return error; |
207 | } | |
208 | ||
076e6acb CH |
209 | STATIC int |
210 | xlog_bread( | |
9a8d2fdb | 211 | struct xlog *log, |
076e6acb CH |
212 | xfs_daddr_t blk_no, |
213 | int nbblks, | |
9a8d2fdb | 214 | struct xfs_buf *bp, |
076e6acb CH |
215 | xfs_caddr_t *offset) |
216 | { | |
217 | int error; | |
218 | ||
219 | error = xlog_bread_noalign(log, blk_no, nbblks, bp); | |
220 | if (error) | |
221 | return error; | |
222 | ||
223 | *offset = xlog_align(log, blk_no, nbblks, bp); | |
224 | return 0; | |
225 | } | |
226 | ||
44396476 DC |
227 | /* |
228 | * Read at an offset into the buffer. Returns with the buffer in it's original | |
229 | * state regardless of the result of the read. | |
230 | */ | |
231 | STATIC int | |
232 | xlog_bread_offset( | |
9a8d2fdb | 233 | struct xlog *log, |
44396476 DC |
234 | xfs_daddr_t blk_no, /* block to read from */ |
235 | int nbblks, /* blocks to read */ | |
9a8d2fdb | 236 | struct xfs_buf *bp, |
44396476 DC |
237 | xfs_caddr_t offset) |
238 | { | |
62926044 | 239 | xfs_caddr_t orig_offset = bp->b_addr; |
4e94b71b | 240 | int orig_len = BBTOB(bp->b_length); |
44396476 DC |
241 | int error, error2; |
242 | ||
02fe03d9 | 243 | error = xfs_buf_associate_memory(bp, offset, BBTOB(nbblks)); |
44396476 DC |
244 | if (error) |
245 | return error; | |
246 | ||
247 | error = xlog_bread_noalign(log, blk_no, nbblks, bp); | |
248 | ||
249 | /* must reset buffer pointer even on error */ | |
02fe03d9 | 250 | error2 = xfs_buf_associate_memory(bp, orig_offset, orig_len); |
44396476 DC |
251 | if (error) |
252 | return error; | |
253 | return error2; | |
254 | } | |
255 | ||
1da177e4 LT |
256 | /* |
257 | * Write out the buffer at the given block for the given number of blocks. | |
258 | * The buffer is kept locked across the write and is returned locked. | |
259 | * This can only be used for synchronous log writes. | |
260 | */ | |
ba0f32d4 | 261 | STATIC int |
1da177e4 | 262 | xlog_bwrite( |
9a8d2fdb | 263 | struct xlog *log, |
1da177e4 LT |
264 | xfs_daddr_t blk_no, |
265 | int nbblks, | |
9a8d2fdb | 266 | struct xfs_buf *bp) |
1da177e4 LT |
267 | { |
268 | int error; | |
269 | ||
ff30a622 | 270 | if (!xlog_buf_bbcount_valid(log, nbblks)) { |
a0fa2b67 | 271 | xfs_warn(log->l_mp, "Invalid block length (0x%x) for buffer", |
ff30a622 AE |
272 | nbblks); |
273 | XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp); | |
3228149c DC |
274 | return EFSCORRUPTED; |
275 | } | |
276 | ||
69ce58f0 AE |
277 | blk_no = round_down(blk_no, log->l_sectBBsize); |
278 | nbblks = round_up(nbblks, log->l_sectBBsize); | |
1da177e4 LT |
279 | |
280 | ASSERT(nbblks > 0); | |
4e94b71b | 281 | ASSERT(nbblks <= bp->b_length); |
1da177e4 LT |
282 | |
283 | XFS_BUF_SET_ADDR(bp, log->l_logBBstart + blk_no); | |
284 | XFS_BUF_ZEROFLAGS(bp); | |
72790aa1 | 285 | xfs_buf_hold(bp); |
0c842ad4 | 286 | xfs_buf_lock(bp); |
aa0e8833 | 287 | bp->b_io_length = nbblks; |
0e95f19a | 288 | bp->b_error = 0; |
1da177e4 | 289 | |
c2b006c1 | 290 | error = xfs_bwrite(bp); |
901796af CH |
291 | if (error) |
292 | xfs_buf_ioerror_alert(bp, __func__); | |
c2b006c1 | 293 | xfs_buf_relse(bp); |
1da177e4 LT |
294 | return error; |
295 | } | |
296 | ||
1da177e4 LT |
297 | #ifdef DEBUG |
298 | /* | |
299 | * dump debug superblock and log record information | |
300 | */ | |
301 | STATIC void | |
302 | xlog_header_check_dump( | |
303 | xfs_mount_t *mp, | |
304 | xlog_rec_header_t *head) | |
305 | { | |
08e96e1a | 306 | xfs_debug(mp, "%s: SB : uuid = %pU, fmt = %d", |
03daa57c | 307 | __func__, &mp->m_sb.sb_uuid, XLOG_FMT); |
08e96e1a | 308 | xfs_debug(mp, " log : uuid = %pU, fmt = %d", |
03daa57c | 309 | &head->h_fs_uuid, be32_to_cpu(head->h_fmt)); |
1da177e4 LT |
310 | } |
311 | #else | |
312 | #define xlog_header_check_dump(mp, head) | |
313 | #endif | |
314 | ||
315 | /* | |
316 | * check log record header for recovery | |
317 | */ | |
318 | STATIC int | |
319 | xlog_header_check_recover( | |
320 | xfs_mount_t *mp, | |
321 | xlog_rec_header_t *head) | |
322 | { | |
69ef921b | 323 | ASSERT(head->h_magicno == cpu_to_be32(XLOG_HEADER_MAGIC_NUM)); |
1da177e4 LT |
324 | |
325 | /* | |
326 | * IRIX doesn't write the h_fmt field and leaves it zeroed | |
327 | * (XLOG_FMT_UNKNOWN). This stops us from trying to recover | |
328 | * a dirty log created in IRIX. | |
329 | */ | |
69ef921b | 330 | if (unlikely(head->h_fmt != cpu_to_be32(XLOG_FMT))) { |
a0fa2b67 DC |
331 | xfs_warn(mp, |
332 | "dirty log written in incompatible format - can't recover"); | |
1da177e4 LT |
333 | xlog_header_check_dump(mp, head); |
334 | XFS_ERROR_REPORT("xlog_header_check_recover(1)", | |
335 | XFS_ERRLEVEL_HIGH, mp); | |
336 | return XFS_ERROR(EFSCORRUPTED); | |
337 | } else if (unlikely(!uuid_equal(&mp->m_sb.sb_uuid, &head->h_fs_uuid))) { | |
a0fa2b67 DC |
338 | xfs_warn(mp, |
339 | "dirty log entry has mismatched uuid - can't recover"); | |
1da177e4 LT |
340 | xlog_header_check_dump(mp, head); |
341 | XFS_ERROR_REPORT("xlog_header_check_recover(2)", | |
342 | XFS_ERRLEVEL_HIGH, mp); | |
343 | return XFS_ERROR(EFSCORRUPTED); | |
344 | } | |
345 | return 0; | |
346 | } | |
347 | ||
348 | /* | |
349 | * read the head block of the log and check the header | |
350 | */ | |
351 | STATIC int | |
352 | xlog_header_check_mount( | |
353 | xfs_mount_t *mp, | |
354 | xlog_rec_header_t *head) | |
355 | { | |
69ef921b | 356 | ASSERT(head->h_magicno == cpu_to_be32(XLOG_HEADER_MAGIC_NUM)); |
1da177e4 LT |
357 | |
358 | if (uuid_is_nil(&head->h_fs_uuid)) { | |
359 | /* | |
360 | * IRIX doesn't write the h_fs_uuid or h_fmt fields. If | |
361 | * h_fs_uuid is nil, we assume this log was last mounted | |
362 | * by IRIX and continue. | |
363 | */ | |
a0fa2b67 | 364 | xfs_warn(mp, "nil uuid in log - IRIX style log"); |
1da177e4 | 365 | } else if (unlikely(!uuid_equal(&mp->m_sb.sb_uuid, &head->h_fs_uuid))) { |
a0fa2b67 | 366 | xfs_warn(mp, "log has mismatched uuid - can't recover"); |
1da177e4 LT |
367 | xlog_header_check_dump(mp, head); |
368 | XFS_ERROR_REPORT("xlog_header_check_mount", | |
369 | XFS_ERRLEVEL_HIGH, mp); | |
370 | return XFS_ERROR(EFSCORRUPTED); | |
371 | } | |
372 | return 0; | |
373 | } | |
374 | ||
375 | STATIC void | |
376 | xlog_recover_iodone( | |
377 | struct xfs_buf *bp) | |
378 | { | |
5a52c2a5 | 379 | if (bp->b_error) { |
1da177e4 LT |
380 | /* |
381 | * We're not going to bother about retrying | |
382 | * this during recovery. One strike! | |
383 | */ | |
901796af | 384 | xfs_buf_ioerror_alert(bp, __func__); |
ebad861b DC |
385 | xfs_force_shutdown(bp->b_target->bt_mount, |
386 | SHUTDOWN_META_IO_ERROR); | |
1da177e4 | 387 | } |
cb669ca5 | 388 | bp->b_iodone = NULL; |
1a1a3e97 | 389 | xfs_buf_ioend(bp, 0); |
1da177e4 LT |
390 | } |
391 | ||
392 | /* | |
393 | * This routine finds (to an approximation) the first block in the physical | |
394 | * log which contains the given cycle. It uses a binary search algorithm. | |
395 | * Note that the algorithm can not be perfect because the disk will not | |
396 | * necessarily be perfect. | |
397 | */ | |
a8272ce0 | 398 | STATIC int |
1da177e4 | 399 | xlog_find_cycle_start( |
9a8d2fdb MT |
400 | struct xlog *log, |
401 | struct xfs_buf *bp, | |
1da177e4 LT |
402 | xfs_daddr_t first_blk, |
403 | xfs_daddr_t *last_blk, | |
404 | uint cycle) | |
405 | { | |
406 | xfs_caddr_t offset; | |
407 | xfs_daddr_t mid_blk; | |
e3bb2e30 | 408 | xfs_daddr_t end_blk; |
1da177e4 LT |
409 | uint mid_cycle; |
410 | int error; | |
411 | ||
e3bb2e30 AE |
412 | end_blk = *last_blk; |
413 | mid_blk = BLK_AVG(first_blk, end_blk); | |
414 | while (mid_blk != first_blk && mid_blk != end_blk) { | |
076e6acb CH |
415 | error = xlog_bread(log, mid_blk, 1, bp, &offset); |
416 | if (error) | |
1da177e4 | 417 | return error; |
03bea6fe | 418 | mid_cycle = xlog_get_cycle(offset); |
e3bb2e30 AE |
419 | if (mid_cycle == cycle) |
420 | end_blk = mid_blk; /* last_half_cycle == mid_cycle */ | |
421 | else | |
422 | first_blk = mid_blk; /* first_half_cycle == mid_cycle */ | |
423 | mid_blk = BLK_AVG(first_blk, end_blk); | |
1da177e4 | 424 | } |
e3bb2e30 AE |
425 | ASSERT((mid_blk == first_blk && mid_blk+1 == end_blk) || |
426 | (mid_blk == end_blk && mid_blk-1 == first_blk)); | |
427 | ||
428 | *last_blk = end_blk; | |
1da177e4 LT |
429 | |
430 | return 0; | |
431 | } | |
432 | ||
433 | /* | |
3f943d85 AE |
434 | * Check that a range of blocks does not contain stop_on_cycle_no. |
435 | * Fill in *new_blk with the block offset where such a block is | |
436 | * found, or with -1 (an invalid block number) if there is no such | |
437 | * block in the range. The scan needs to occur from front to back | |
438 | * and the pointer into the region must be updated since a later | |
439 | * routine will need to perform another test. | |
1da177e4 LT |
440 | */ |
441 | STATIC int | |
442 | xlog_find_verify_cycle( | |
9a8d2fdb | 443 | struct xlog *log, |
1da177e4 LT |
444 | xfs_daddr_t start_blk, |
445 | int nbblks, | |
446 | uint stop_on_cycle_no, | |
447 | xfs_daddr_t *new_blk) | |
448 | { | |
449 | xfs_daddr_t i, j; | |
450 | uint cycle; | |
451 | xfs_buf_t *bp; | |
452 | xfs_daddr_t bufblks; | |
453 | xfs_caddr_t buf = NULL; | |
454 | int error = 0; | |
455 | ||
6881a229 AE |
456 | /* |
457 | * Greedily allocate a buffer big enough to handle the full | |
458 | * range of basic blocks we'll be examining. If that fails, | |
459 | * try a smaller size. We need to be able to read at least | |
460 | * a log sector, or we're out of luck. | |
461 | */ | |
1da177e4 | 462 | bufblks = 1 << ffs(nbblks); |
81158e0c DC |
463 | while (bufblks > log->l_logBBsize) |
464 | bufblks >>= 1; | |
1da177e4 | 465 | while (!(bp = xlog_get_bp(log, bufblks))) { |
1da177e4 | 466 | bufblks >>= 1; |
69ce58f0 | 467 | if (bufblks < log->l_sectBBsize) |
1da177e4 LT |
468 | return ENOMEM; |
469 | } | |
470 | ||
471 | for (i = start_blk; i < start_blk + nbblks; i += bufblks) { | |
472 | int bcount; | |
473 | ||
474 | bcount = min(bufblks, (start_blk + nbblks - i)); | |
475 | ||
076e6acb CH |
476 | error = xlog_bread(log, i, bcount, bp, &buf); |
477 | if (error) | |
1da177e4 LT |
478 | goto out; |
479 | ||
1da177e4 | 480 | for (j = 0; j < bcount; j++) { |
03bea6fe | 481 | cycle = xlog_get_cycle(buf); |
1da177e4 LT |
482 | if (cycle == stop_on_cycle_no) { |
483 | *new_blk = i+j; | |
484 | goto out; | |
485 | } | |
486 | ||
487 | buf += BBSIZE; | |
488 | } | |
489 | } | |
490 | ||
491 | *new_blk = -1; | |
492 | ||
493 | out: | |
494 | xlog_put_bp(bp); | |
495 | return error; | |
496 | } | |
497 | ||
498 | /* | |
499 | * Potentially backup over partial log record write. | |
500 | * | |
501 | * In the typical case, last_blk is the number of the block directly after | |
502 | * a good log record. Therefore, we subtract one to get the block number | |
503 | * of the last block in the given buffer. extra_bblks contains the number | |
504 | * of blocks we would have read on a previous read. This happens when the | |
505 | * last log record is split over the end of the physical log. | |
506 | * | |
507 | * extra_bblks is the number of blocks potentially verified on a previous | |
508 | * call to this routine. | |
509 | */ | |
510 | STATIC int | |
511 | xlog_find_verify_log_record( | |
9a8d2fdb | 512 | struct xlog *log, |
1da177e4 LT |
513 | xfs_daddr_t start_blk, |
514 | xfs_daddr_t *last_blk, | |
515 | int extra_bblks) | |
516 | { | |
517 | xfs_daddr_t i; | |
518 | xfs_buf_t *bp; | |
519 | xfs_caddr_t offset = NULL; | |
520 | xlog_rec_header_t *head = NULL; | |
521 | int error = 0; | |
522 | int smallmem = 0; | |
523 | int num_blks = *last_blk - start_blk; | |
524 | int xhdrs; | |
525 | ||
526 | ASSERT(start_blk != 0 || *last_blk != start_blk); | |
527 | ||
528 | if (!(bp = xlog_get_bp(log, num_blks))) { | |
529 | if (!(bp = xlog_get_bp(log, 1))) | |
530 | return ENOMEM; | |
531 | smallmem = 1; | |
532 | } else { | |
076e6acb CH |
533 | error = xlog_bread(log, start_blk, num_blks, bp, &offset); |
534 | if (error) | |
1da177e4 | 535 | goto out; |
1da177e4 LT |
536 | offset += ((num_blks - 1) << BBSHIFT); |
537 | } | |
538 | ||
539 | for (i = (*last_blk) - 1; i >= 0; i--) { | |
540 | if (i < start_blk) { | |
541 | /* valid log record not found */ | |
a0fa2b67 DC |
542 | xfs_warn(log->l_mp, |
543 | "Log inconsistent (didn't find previous header)"); | |
1da177e4 LT |
544 | ASSERT(0); |
545 | error = XFS_ERROR(EIO); | |
546 | goto out; | |
547 | } | |
548 | ||
549 | if (smallmem) { | |
076e6acb CH |
550 | error = xlog_bread(log, i, 1, bp, &offset); |
551 | if (error) | |
1da177e4 | 552 | goto out; |
1da177e4 LT |
553 | } |
554 | ||
555 | head = (xlog_rec_header_t *)offset; | |
556 | ||
69ef921b | 557 | if (head->h_magicno == cpu_to_be32(XLOG_HEADER_MAGIC_NUM)) |
1da177e4 LT |
558 | break; |
559 | ||
560 | if (!smallmem) | |
561 | offset -= BBSIZE; | |
562 | } | |
563 | ||
564 | /* | |
565 | * We hit the beginning of the physical log & still no header. Return | |
566 | * to caller. If caller can handle a return of -1, then this routine | |
567 | * will be called again for the end of the physical log. | |
568 | */ | |
569 | if (i == -1) { | |
570 | error = -1; | |
571 | goto out; | |
572 | } | |
573 | ||
574 | /* | |
575 | * We have the final block of the good log (the first block | |
576 | * of the log record _before_ the head. So we check the uuid. | |
577 | */ | |
578 | if ((error = xlog_header_check_mount(log->l_mp, head))) | |
579 | goto out; | |
580 | ||
581 | /* | |
582 | * We may have found a log record header before we expected one. | |
583 | * last_blk will be the 1st block # with a given cycle #. We may end | |
584 | * up reading an entire log record. In this case, we don't want to | |
585 | * reset last_blk. Only when last_blk points in the middle of a log | |
586 | * record do we update last_blk. | |
587 | */ | |
62118709 | 588 | if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { |
b53e675d | 589 | uint h_size = be32_to_cpu(head->h_size); |
1da177e4 LT |
590 | |
591 | xhdrs = h_size / XLOG_HEADER_CYCLE_SIZE; | |
592 | if (h_size % XLOG_HEADER_CYCLE_SIZE) | |
593 | xhdrs++; | |
594 | } else { | |
595 | xhdrs = 1; | |
596 | } | |
597 | ||
b53e675d CH |
598 | if (*last_blk - i + extra_bblks != |
599 | BTOBB(be32_to_cpu(head->h_len)) + xhdrs) | |
1da177e4 LT |
600 | *last_blk = i; |
601 | ||
602 | out: | |
603 | xlog_put_bp(bp); | |
604 | return error; | |
605 | } | |
606 | ||
607 | /* | |
608 | * Head is defined to be the point of the log where the next log write | |
0a94da24 | 609 | * could go. This means that incomplete LR writes at the end are |
1da177e4 LT |
610 | * eliminated when calculating the head. We aren't guaranteed that previous |
611 | * LR have complete transactions. We only know that a cycle number of | |
612 | * current cycle number -1 won't be present in the log if we start writing | |
613 | * from our current block number. | |
614 | * | |
615 | * last_blk contains the block number of the first block with a given | |
616 | * cycle number. | |
617 | * | |
618 | * Return: zero if normal, non-zero if error. | |
619 | */ | |
ba0f32d4 | 620 | STATIC int |
1da177e4 | 621 | xlog_find_head( |
9a8d2fdb | 622 | struct xlog *log, |
1da177e4 LT |
623 | xfs_daddr_t *return_head_blk) |
624 | { | |
625 | xfs_buf_t *bp; | |
626 | xfs_caddr_t offset; | |
627 | xfs_daddr_t new_blk, first_blk, start_blk, last_blk, head_blk; | |
628 | int num_scan_bblks; | |
629 | uint first_half_cycle, last_half_cycle; | |
630 | uint stop_on_cycle; | |
631 | int error, log_bbnum = log->l_logBBsize; | |
632 | ||
633 | /* Is the end of the log device zeroed? */ | |
634 | if ((error = xlog_find_zeroed(log, &first_blk)) == -1) { | |
635 | *return_head_blk = first_blk; | |
636 | ||
637 | /* Is the whole lot zeroed? */ | |
638 | if (!first_blk) { | |
639 | /* Linux XFS shouldn't generate totally zeroed logs - | |
640 | * mkfs etc write a dummy unmount record to a fresh | |
641 | * log so we can store the uuid in there | |
642 | */ | |
a0fa2b67 | 643 | xfs_warn(log->l_mp, "totally zeroed log"); |
1da177e4 LT |
644 | } |
645 | ||
646 | return 0; | |
647 | } else if (error) { | |
a0fa2b67 | 648 | xfs_warn(log->l_mp, "empty log check failed"); |
1da177e4 LT |
649 | return error; |
650 | } | |
651 | ||
652 | first_blk = 0; /* get cycle # of 1st block */ | |
653 | bp = xlog_get_bp(log, 1); | |
654 | if (!bp) | |
655 | return ENOMEM; | |
076e6acb CH |
656 | |
657 | error = xlog_bread(log, 0, 1, bp, &offset); | |
658 | if (error) | |
1da177e4 | 659 | goto bp_err; |
076e6acb | 660 | |
03bea6fe | 661 | first_half_cycle = xlog_get_cycle(offset); |
1da177e4 LT |
662 | |
663 | last_blk = head_blk = log_bbnum - 1; /* get cycle # of last block */ | |
076e6acb CH |
664 | error = xlog_bread(log, last_blk, 1, bp, &offset); |
665 | if (error) | |
1da177e4 | 666 | goto bp_err; |
076e6acb | 667 | |
03bea6fe | 668 | last_half_cycle = xlog_get_cycle(offset); |
1da177e4 LT |
669 | ASSERT(last_half_cycle != 0); |
670 | ||
671 | /* | |
672 | * If the 1st half cycle number is equal to the last half cycle number, | |
673 | * then the entire log is stamped with the same cycle number. In this | |
674 | * case, head_blk can't be set to zero (which makes sense). The below | |
675 | * math doesn't work out properly with head_blk equal to zero. Instead, | |
676 | * we set it to log_bbnum which is an invalid block number, but this | |
677 | * value makes the math correct. If head_blk doesn't changed through | |
678 | * all the tests below, *head_blk is set to zero at the very end rather | |
679 | * than log_bbnum. In a sense, log_bbnum and zero are the same block | |
680 | * in a circular file. | |
681 | */ | |
682 | if (first_half_cycle == last_half_cycle) { | |
683 | /* | |
684 | * In this case we believe that the entire log should have | |
685 | * cycle number last_half_cycle. We need to scan backwards | |
686 | * from the end verifying that there are no holes still | |
687 | * containing last_half_cycle - 1. If we find such a hole, | |
688 | * then the start of that hole will be the new head. The | |
689 | * simple case looks like | |
690 | * x | x ... | x - 1 | x | |
691 | * Another case that fits this picture would be | |
692 | * x | x + 1 | x ... | x | |
c41564b5 | 693 | * In this case the head really is somewhere at the end of the |
1da177e4 LT |
694 | * log, as one of the latest writes at the beginning was |
695 | * incomplete. | |
696 | * One more case is | |
697 | * x | x + 1 | x ... | x - 1 | x | |
698 | * This is really the combination of the above two cases, and | |
699 | * the head has to end up at the start of the x-1 hole at the | |
700 | * end of the log. | |
701 | * | |
702 | * In the 256k log case, we will read from the beginning to the | |
703 | * end of the log and search for cycle numbers equal to x-1. | |
704 | * We don't worry about the x+1 blocks that we encounter, | |
705 | * because we know that they cannot be the head since the log | |
706 | * started with x. | |
707 | */ | |
708 | head_blk = log_bbnum; | |
709 | stop_on_cycle = last_half_cycle - 1; | |
710 | } else { | |
711 | /* | |
712 | * In this case we want to find the first block with cycle | |
713 | * number matching last_half_cycle. We expect the log to be | |
714 | * some variation on | |
3f943d85 | 715 | * x + 1 ... | x ... | x |
1da177e4 LT |
716 | * The first block with cycle number x (last_half_cycle) will |
717 | * be where the new head belongs. First we do a binary search | |
718 | * for the first occurrence of last_half_cycle. The binary | |
719 | * search may not be totally accurate, so then we scan back | |
720 | * from there looking for occurrences of last_half_cycle before | |
721 | * us. If that backwards scan wraps around the beginning of | |
722 | * the log, then we look for occurrences of last_half_cycle - 1 | |
723 | * at the end of the log. The cases we're looking for look | |
724 | * like | |
3f943d85 AE |
725 | * v binary search stopped here |
726 | * x + 1 ... | x | x + 1 | x ... | x | |
727 | * ^ but we want to locate this spot | |
1da177e4 | 728 | * or |
1da177e4 | 729 | * <---------> less than scan distance |
3f943d85 AE |
730 | * x + 1 ... | x ... | x - 1 | x |
731 | * ^ we want to locate this spot | |
1da177e4 LT |
732 | */ |
733 | stop_on_cycle = last_half_cycle; | |
734 | if ((error = xlog_find_cycle_start(log, bp, first_blk, | |
735 | &head_blk, last_half_cycle))) | |
736 | goto bp_err; | |
737 | } | |
738 | ||
739 | /* | |
740 | * Now validate the answer. Scan back some number of maximum possible | |
741 | * blocks and make sure each one has the expected cycle number. The | |
742 | * maximum is determined by the total possible amount of buffering | |
743 | * in the in-core log. The following number can be made tighter if | |
744 | * we actually look at the block size of the filesystem. | |
745 | */ | |
746 | num_scan_bblks = XLOG_TOTAL_REC_SHIFT(log); | |
747 | if (head_blk >= num_scan_bblks) { | |
748 | /* | |
749 | * We are guaranteed that the entire check can be performed | |
750 | * in one buffer. | |
751 | */ | |
752 | start_blk = head_blk - num_scan_bblks; | |
753 | if ((error = xlog_find_verify_cycle(log, | |
754 | start_blk, num_scan_bblks, | |
755 | stop_on_cycle, &new_blk))) | |
756 | goto bp_err; | |
757 | if (new_blk != -1) | |
758 | head_blk = new_blk; | |
759 | } else { /* need to read 2 parts of log */ | |
760 | /* | |
761 | * We are going to scan backwards in the log in two parts. | |
762 | * First we scan the physical end of the log. In this part | |
763 | * of the log, we are looking for blocks with cycle number | |
764 | * last_half_cycle - 1. | |
765 | * If we find one, then we know that the log starts there, as | |
766 | * we've found a hole that didn't get written in going around | |
767 | * the end of the physical log. The simple case for this is | |
768 | * x + 1 ... | x ... | x - 1 | x | |
769 | * <---------> less than scan distance | |
770 | * If all of the blocks at the end of the log have cycle number | |
771 | * last_half_cycle, then we check the blocks at the start of | |
772 | * the log looking for occurrences of last_half_cycle. If we | |
773 | * find one, then our current estimate for the location of the | |
774 | * first occurrence of last_half_cycle is wrong and we move | |
775 | * back to the hole we've found. This case looks like | |
776 | * x + 1 ... | x | x + 1 | x ... | |
777 | * ^ binary search stopped here | |
778 | * Another case we need to handle that only occurs in 256k | |
779 | * logs is | |
780 | * x + 1 ... | x ... | x+1 | x ... | |
781 | * ^ binary search stops here | |
782 | * In a 256k log, the scan at the end of the log will see the | |
783 | * x + 1 blocks. We need to skip past those since that is | |
784 | * certainly not the head of the log. By searching for | |
785 | * last_half_cycle-1 we accomplish that. | |
786 | */ | |
1da177e4 | 787 | ASSERT(head_blk <= INT_MAX && |
3f943d85 AE |
788 | (xfs_daddr_t) num_scan_bblks >= head_blk); |
789 | start_blk = log_bbnum - (num_scan_bblks - head_blk); | |
1da177e4 LT |
790 | if ((error = xlog_find_verify_cycle(log, start_blk, |
791 | num_scan_bblks - (int)head_blk, | |
792 | (stop_on_cycle - 1), &new_blk))) | |
793 | goto bp_err; | |
794 | if (new_blk != -1) { | |
795 | head_blk = new_blk; | |
9db127ed | 796 | goto validate_head; |
1da177e4 LT |
797 | } |
798 | ||
799 | /* | |
800 | * Scan beginning of log now. The last part of the physical | |
801 | * log is good. This scan needs to verify that it doesn't find | |
802 | * the last_half_cycle. | |
803 | */ | |
804 | start_blk = 0; | |
805 | ASSERT(head_blk <= INT_MAX); | |
806 | if ((error = xlog_find_verify_cycle(log, | |
807 | start_blk, (int)head_blk, | |
808 | stop_on_cycle, &new_blk))) | |
809 | goto bp_err; | |
810 | if (new_blk != -1) | |
811 | head_blk = new_blk; | |
812 | } | |
813 | ||
9db127ed | 814 | validate_head: |
1da177e4 LT |
815 | /* |
816 | * Now we need to make sure head_blk is not pointing to a block in | |
817 | * the middle of a log record. | |
818 | */ | |
819 | num_scan_bblks = XLOG_REC_SHIFT(log); | |
820 | if (head_blk >= num_scan_bblks) { | |
821 | start_blk = head_blk - num_scan_bblks; /* don't read head_blk */ | |
822 | ||
823 | /* start ptr at last block ptr before head_blk */ | |
824 | if ((error = xlog_find_verify_log_record(log, start_blk, | |
825 | &head_blk, 0)) == -1) { | |
826 | error = XFS_ERROR(EIO); | |
827 | goto bp_err; | |
828 | } else if (error) | |
829 | goto bp_err; | |
830 | } else { | |
831 | start_blk = 0; | |
832 | ASSERT(head_blk <= INT_MAX); | |
833 | if ((error = xlog_find_verify_log_record(log, start_blk, | |
834 | &head_blk, 0)) == -1) { | |
835 | /* We hit the beginning of the log during our search */ | |
3f943d85 | 836 | start_blk = log_bbnum - (num_scan_bblks - head_blk); |
1da177e4 LT |
837 | new_blk = log_bbnum; |
838 | ASSERT(start_blk <= INT_MAX && | |
839 | (xfs_daddr_t) log_bbnum-start_blk >= 0); | |
840 | ASSERT(head_blk <= INT_MAX); | |
841 | if ((error = xlog_find_verify_log_record(log, | |
842 | start_blk, &new_blk, | |
843 | (int)head_blk)) == -1) { | |
844 | error = XFS_ERROR(EIO); | |
845 | goto bp_err; | |
846 | } else if (error) | |
847 | goto bp_err; | |
848 | if (new_blk != log_bbnum) | |
849 | head_blk = new_blk; | |
850 | } else if (error) | |
851 | goto bp_err; | |
852 | } | |
853 | ||
854 | xlog_put_bp(bp); | |
855 | if (head_blk == log_bbnum) | |
856 | *return_head_blk = 0; | |
857 | else | |
858 | *return_head_blk = head_blk; | |
859 | /* | |
860 | * When returning here, we have a good block number. Bad block | |
861 | * means that during a previous crash, we didn't have a clean break | |
862 | * from cycle number N to cycle number N-1. In this case, we need | |
863 | * to find the first block with cycle number N-1. | |
864 | */ | |
865 | return 0; | |
866 | ||
867 | bp_err: | |
868 | xlog_put_bp(bp); | |
869 | ||
870 | if (error) | |
a0fa2b67 | 871 | xfs_warn(log->l_mp, "failed to find log head"); |
1da177e4 LT |
872 | return error; |
873 | } | |
874 | ||
875 | /* | |
876 | * Find the sync block number or the tail of the log. | |
877 | * | |
878 | * This will be the block number of the last record to have its | |
879 | * associated buffers synced to disk. Every log record header has | |
880 | * a sync lsn embedded in it. LSNs hold block numbers, so it is easy | |
881 | * to get a sync block number. The only concern is to figure out which | |
882 | * log record header to believe. | |
883 | * | |
884 | * The following algorithm uses the log record header with the largest | |
885 | * lsn. The entire log record does not need to be valid. We only care | |
886 | * that the header is valid. | |
887 | * | |
888 | * We could speed up search by using current head_blk buffer, but it is not | |
889 | * available. | |
890 | */ | |
5d77c0dc | 891 | STATIC int |
1da177e4 | 892 | xlog_find_tail( |
9a8d2fdb | 893 | struct xlog *log, |
1da177e4 | 894 | xfs_daddr_t *head_blk, |
65be6054 | 895 | xfs_daddr_t *tail_blk) |
1da177e4 LT |
896 | { |
897 | xlog_rec_header_t *rhead; | |
898 | xlog_op_header_t *op_head; | |
899 | xfs_caddr_t offset = NULL; | |
900 | xfs_buf_t *bp; | |
901 | int error, i, found; | |
902 | xfs_daddr_t umount_data_blk; | |
903 | xfs_daddr_t after_umount_blk; | |
904 | xfs_lsn_t tail_lsn; | |
905 | int hblks; | |
906 | ||
907 | found = 0; | |
908 | ||
909 | /* | |
910 | * Find previous log record | |
911 | */ | |
912 | if ((error = xlog_find_head(log, head_blk))) | |
913 | return error; | |
914 | ||
915 | bp = xlog_get_bp(log, 1); | |
916 | if (!bp) | |
917 | return ENOMEM; | |
918 | if (*head_blk == 0) { /* special case */ | |
076e6acb CH |
919 | error = xlog_bread(log, 0, 1, bp, &offset); |
920 | if (error) | |
9db127ed | 921 | goto done; |
076e6acb | 922 | |
03bea6fe | 923 | if (xlog_get_cycle(offset) == 0) { |
1da177e4 LT |
924 | *tail_blk = 0; |
925 | /* leave all other log inited values alone */ | |
9db127ed | 926 | goto done; |
1da177e4 LT |
927 | } |
928 | } | |
929 | ||
930 | /* | |
931 | * Search backwards looking for log record header block | |
932 | */ | |
933 | ASSERT(*head_blk < INT_MAX); | |
934 | for (i = (int)(*head_blk) - 1; i >= 0; i--) { | |
076e6acb CH |
935 | error = xlog_bread(log, i, 1, bp, &offset); |
936 | if (error) | |
9db127ed | 937 | goto done; |
076e6acb | 938 | |
69ef921b | 939 | if (*(__be32 *)offset == cpu_to_be32(XLOG_HEADER_MAGIC_NUM)) { |
1da177e4 LT |
940 | found = 1; |
941 | break; | |
942 | } | |
943 | } | |
944 | /* | |
945 | * If we haven't found the log record header block, start looking | |
946 | * again from the end of the physical log. XXXmiken: There should be | |
947 | * a check here to make sure we didn't search more than N blocks in | |
948 | * the previous code. | |
949 | */ | |
950 | if (!found) { | |
951 | for (i = log->l_logBBsize - 1; i >= (int)(*head_blk); i--) { | |
076e6acb CH |
952 | error = xlog_bread(log, i, 1, bp, &offset); |
953 | if (error) | |
9db127ed | 954 | goto done; |
076e6acb | 955 | |
69ef921b CH |
956 | if (*(__be32 *)offset == |
957 | cpu_to_be32(XLOG_HEADER_MAGIC_NUM)) { | |
1da177e4 LT |
958 | found = 2; |
959 | break; | |
960 | } | |
961 | } | |
962 | } | |
963 | if (!found) { | |
a0fa2b67 | 964 | xfs_warn(log->l_mp, "%s: couldn't find sync record", __func__); |
050a1952 | 965 | xlog_put_bp(bp); |
1da177e4 LT |
966 | ASSERT(0); |
967 | return XFS_ERROR(EIO); | |
968 | } | |
969 | ||
970 | /* find blk_no of tail of log */ | |
971 | rhead = (xlog_rec_header_t *)offset; | |
b53e675d | 972 | *tail_blk = BLOCK_LSN(be64_to_cpu(rhead->h_tail_lsn)); |
1da177e4 LT |
973 | |
974 | /* | |
975 | * Reset log values according to the state of the log when we | |
976 | * crashed. In the case where head_blk == 0, we bump curr_cycle | |
977 | * one because the next write starts a new cycle rather than | |
978 | * continuing the cycle of the last good log record. At this | |
979 | * point we have guaranteed that all partial log records have been | |
980 | * accounted for. Therefore, we know that the last good log record | |
981 | * written was complete and ended exactly on the end boundary | |
982 | * of the physical log. | |
983 | */ | |
984 | log->l_prev_block = i; | |
985 | log->l_curr_block = (int)*head_blk; | |
b53e675d | 986 | log->l_curr_cycle = be32_to_cpu(rhead->h_cycle); |
1da177e4 LT |
987 | if (found == 2) |
988 | log->l_curr_cycle++; | |
1c3cb9ec | 989 | atomic64_set(&log->l_tail_lsn, be64_to_cpu(rhead->h_tail_lsn)); |
84f3c683 | 990 | atomic64_set(&log->l_last_sync_lsn, be64_to_cpu(rhead->h_lsn)); |
28496968 | 991 | xlog_assign_grant_head(&log->l_reserve_head.grant, log->l_curr_cycle, |
a69ed03c | 992 | BBTOB(log->l_curr_block)); |
28496968 | 993 | xlog_assign_grant_head(&log->l_write_head.grant, log->l_curr_cycle, |
a69ed03c | 994 | BBTOB(log->l_curr_block)); |
1da177e4 LT |
995 | |
996 | /* | |
997 | * Look for unmount record. If we find it, then we know there | |
998 | * was a clean unmount. Since 'i' could be the last block in | |
999 | * the physical log, we convert to a log block before comparing | |
1000 | * to the head_blk. | |
1001 | * | |
1002 | * Save the current tail lsn to use to pass to | |
1003 | * xlog_clear_stale_blocks() below. We won't want to clear the | |
1004 | * unmount record if there is one, so we pass the lsn of the | |
1005 | * unmount record rather than the block after it. | |
1006 | */ | |
62118709 | 1007 | if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { |
b53e675d CH |
1008 | int h_size = be32_to_cpu(rhead->h_size); |
1009 | int h_version = be32_to_cpu(rhead->h_version); | |
1da177e4 LT |
1010 | |
1011 | if ((h_version & XLOG_VERSION_2) && | |
1012 | (h_size > XLOG_HEADER_CYCLE_SIZE)) { | |
1013 | hblks = h_size / XLOG_HEADER_CYCLE_SIZE; | |
1014 | if (h_size % XLOG_HEADER_CYCLE_SIZE) | |
1015 | hblks++; | |
1016 | } else { | |
1017 | hblks = 1; | |
1018 | } | |
1019 | } else { | |
1020 | hblks = 1; | |
1021 | } | |
1022 | after_umount_blk = (i + hblks + (int) | |
b53e675d | 1023 | BTOBB(be32_to_cpu(rhead->h_len))) % log->l_logBBsize; |
1c3cb9ec | 1024 | tail_lsn = atomic64_read(&log->l_tail_lsn); |
1da177e4 | 1025 | if (*head_blk == after_umount_blk && |
b53e675d | 1026 | be32_to_cpu(rhead->h_num_logops) == 1) { |
1da177e4 | 1027 | umount_data_blk = (i + hblks) % log->l_logBBsize; |
076e6acb CH |
1028 | error = xlog_bread(log, umount_data_blk, 1, bp, &offset); |
1029 | if (error) | |
9db127ed | 1030 | goto done; |
076e6acb | 1031 | |
1da177e4 LT |
1032 | op_head = (xlog_op_header_t *)offset; |
1033 | if (op_head->oh_flags & XLOG_UNMOUNT_TRANS) { | |
1034 | /* | |
1035 | * Set tail and last sync so that newly written | |
1036 | * log records will point recovery to after the | |
1037 | * current unmount record. | |
1038 | */ | |
1c3cb9ec DC |
1039 | xlog_assign_atomic_lsn(&log->l_tail_lsn, |
1040 | log->l_curr_cycle, after_umount_blk); | |
1041 | xlog_assign_atomic_lsn(&log->l_last_sync_lsn, | |
1042 | log->l_curr_cycle, after_umount_blk); | |
1da177e4 | 1043 | *tail_blk = after_umount_blk; |
92821e2b DC |
1044 | |
1045 | /* | |
1046 | * Note that the unmount was clean. If the unmount | |
1047 | * was not clean, we need to know this to rebuild the | |
1048 | * superblock counters from the perag headers if we | |
1049 | * have a filesystem using non-persistent counters. | |
1050 | */ | |
1051 | log->l_mp->m_flags |= XFS_MOUNT_WAS_CLEAN; | |
1da177e4 LT |
1052 | } |
1053 | } | |
1054 | ||
1055 | /* | |
1056 | * Make sure that there are no blocks in front of the head | |
1057 | * with the same cycle number as the head. This can happen | |
1058 | * because we allow multiple outstanding log writes concurrently, | |
1059 | * and the later writes might make it out before earlier ones. | |
1060 | * | |
1061 | * We use the lsn from before modifying it so that we'll never | |
1062 | * overwrite the unmount record after a clean unmount. | |
1063 | * | |
1064 | * Do this only if we are going to recover the filesystem | |
1065 | * | |
1066 | * NOTE: This used to say "if (!readonly)" | |
1067 | * However on Linux, we can & do recover a read-only filesystem. | |
1068 | * We only skip recovery if NORECOVERY is specified on mount, | |
1069 | * in which case we would not be here. | |
1070 | * | |
1071 | * But... if the -device- itself is readonly, just skip this. | |
1072 | * We can't recover this device anyway, so it won't matter. | |
1073 | */ | |
9db127ed | 1074 | if (!xfs_readonly_buftarg(log->l_mp->m_logdev_targp)) |
1da177e4 | 1075 | error = xlog_clear_stale_blocks(log, tail_lsn); |
1da177e4 | 1076 | |
9db127ed | 1077 | done: |
1da177e4 LT |
1078 | xlog_put_bp(bp); |
1079 | ||
1080 | if (error) | |
a0fa2b67 | 1081 | xfs_warn(log->l_mp, "failed to locate log tail"); |
1da177e4 LT |
1082 | return error; |
1083 | } | |
1084 | ||
1085 | /* | |
1086 | * Is the log zeroed at all? | |
1087 | * | |
1088 | * The last binary search should be changed to perform an X block read | |
1089 | * once X becomes small enough. You can then search linearly through | |
1090 | * the X blocks. This will cut down on the number of reads we need to do. | |
1091 | * | |
1092 | * If the log is partially zeroed, this routine will pass back the blkno | |
1093 | * of the first block with cycle number 0. It won't have a complete LR | |
1094 | * preceding it. | |
1095 | * | |
1096 | * Return: | |
1097 | * 0 => the log is completely written to | |
1098 | * -1 => use *blk_no as the first block of the log | |
1099 | * >0 => error has occurred | |
1100 | */ | |
a8272ce0 | 1101 | STATIC int |
1da177e4 | 1102 | xlog_find_zeroed( |
9a8d2fdb | 1103 | struct xlog *log, |
1da177e4 LT |
1104 | xfs_daddr_t *blk_no) |
1105 | { | |
1106 | xfs_buf_t *bp; | |
1107 | xfs_caddr_t offset; | |
1108 | uint first_cycle, last_cycle; | |
1109 | xfs_daddr_t new_blk, last_blk, start_blk; | |
1110 | xfs_daddr_t num_scan_bblks; | |
1111 | int error, log_bbnum = log->l_logBBsize; | |
1112 | ||
6fdf8ccc NS |
1113 | *blk_no = 0; |
1114 | ||
1da177e4 LT |
1115 | /* check totally zeroed log */ |
1116 | bp = xlog_get_bp(log, 1); | |
1117 | if (!bp) | |
1118 | return ENOMEM; | |
076e6acb CH |
1119 | error = xlog_bread(log, 0, 1, bp, &offset); |
1120 | if (error) | |
1da177e4 | 1121 | goto bp_err; |
076e6acb | 1122 | |
03bea6fe | 1123 | first_cycle = xlog_get_cycle(offset); |
1da177e4 LT |
1124 | if (first_cycle == 0) { /* completely zeroed log */ |
1125 | *blk_no = 0; | |
1126 | xlog_put_bp(bp); | |
1127 | return -1; | |
1128 | } | |
1129 | ||
1130 | /* check partially zeroed log */ | |
076e6acb CH |
1131 | error = xlog_bread(log, log_bbnum-1, 1, bp, &offset); |
1132 | if (error) | |
1da177e4 | 1133 | goto bp_err; |
076e6acb | 1134 | |
03bea6fe | 1135 | last_cycle = xlog_get_cycle(offset); |
1da177e4 LT |
1136 | if (last_cycle != 0) { /* log completely written to */ |
1137 | xlog_put_bp(bp); | |
1138 | return 0; | |
1139 | } else if (first_cycle != 1) { | |
1140 | /* | |
1141 | * If the cycle of the last block is zero, the cycle of | |
1142 | * the first block must be 1. If it's not, maybe we're | |
1143 | * not looking at a log... Bail out. | |
1144 | */ | |
a0fa2b67 DC |
1145 | xfs_warn(log->l_mp, |
1146 | "Log inconsistent or not a log (last==0, first!=1)"); | |
5d0a6549 ES |
1147 | error = XFS_ERROR(EINVAL); |
1148 | goto bp_err; | |
1da177e4 LT |
1149 | } |
1150 | ||
1151 | /* we have a partially zeroed log */ | |
1152 | last_blk = log_bbnum-1; | |
1153 | if ((error = xlog_find_cycle_start(log, bp, 0, &last_blk, 0))) | |
1154 | goto bp_err; | |
1155 | ||
1156 | /* | |
1157 | * Validate the answer. Because there is no way to guarantee that | |
1158 | * the entire log is made up of log records which are the same size, | |
1159 | * we scan over the defined maximum blocks. At this point, the maximum | |
1160 | * is not chosen to mean anything special. XXXmiken | |
1161 | */ | |
1162 | num_scan_bblks = XLOG_TOTAL_REC_SHIFT(log); | |
1163 | ASSERT(num_scan_bblks <= INT_MAX); | |
1164 | ||
1165 | if (last_blk < num_scan_bblks) | |
1166 | num_scan_bblks = last_blk; | |
1167 | start_blk = last_blk - num_scan_bblks; | |
1168 | ||
1169 | /* | |
1170 | * We search for any instances of cycle number 0 that occur before | |
1171 | * our current estimate of the head. What we're trying to detect is | |
1172 | * 1 ... | 0 | 1 | 0... | |
1173 | * ^ binary search ends here | |
1174 | */ | |
1175 | if ((error = xlog_find_verify_cycle(log, start_blk, | |
1176 | (int)num_scan_bblks, 0, &new_blk))) | |
1177 | goto bp_err; | |
1178 | if (new_blk != -1) | |
1179 | last_blk = new_blk; | |
1180 | ||
1181 | /* | |
1182 | * Potentially backup over partial log record write. We don't need | |
1183 | * to search the end of the log because we know it is zero. | |
1184 | */ | |
1185 | if ((error = xlog_find_verify_log_record(log, start_blk, | |
1186 | &last_blk, 0)) == -1) { | |
1187 | error = XFS_ERROR(EIO); | |
1188 | goto bp_err; | |
1189 | } else if (error) | |
1190 | goto bp_err; | |
1191 | ||
1192 | *blk_no = last_blk; | |
1193 | bp_err: | |
1194 | xlog_put_bp(bp); | |
1195 | if (error) | |
1196 | return error; | |
1197 | return -1; | |
1198 | } | |
1199 | ||
1200 | /* | |
1201 | * These are simple subroutines used by xlog_clear_stale_blocks() below | |
1202 | * to initialize a buffer full of empty log record headers and write | |
1203 | * them into the log. | |
1204 | */ | |
1205 | STATIC void | |
1206 | xlog_add_record( | |
9a8d2fdb | 1207 | struct xlog *log, |
1da177e4 LT |
1208 | xfs_caddr_t buf, |
1209 | int cycle, | |
1210 | int block, | |
1211 | int tail_cycle, | |
1212 | int tail_block) | |
1213 | { | |
1214 | xlog_rec_header_t *recp = (xlog_rec_header_t *)buf; | |
1215 | ||
1216 | memset(buf, 0, BBSIZE); | |
b53e675d CH |
1217 | recp->h_magicno = cpu_to_be32(XLOG_HEADER_MAGIC_NUM); |
1218 | recp->h_cycle = cpu_to_be32(cycle); | |
1219 | recp->h_version = cpu_to_be32( | |
62118709 | 1220 | xfs_sb_version_haslogv2(&log->l_mp->m_sb) ? 2 : 1); |
b53e675d CH |
1221 | recp->h_lsn = cpu_to_be64(xlog_assign_lsn(cycle, block)); |
1222 | recp->h_tail_lsn = cpu_to_be64(xlog_assign_lsn(tail_cycle, tail_block)); | |
1223 | recp->h_fmt = cpu_to_be32(XLOG_FMT); | |
1da177e4 LT |
1224 | memcpy(&recp->h_fs_uuid, &log->l_mp->m_sb.sb_uuid, sizeof(uuid_t)); |
1225 | } | |
1226 | ||
1227 | STATIC int | |
1228 | xlog_write_log_records( | |
9a8d2fdb | 1229 | struct xlog *log, |
1da177e4 LT |
1230 | int cycle, |
1231 | int start_block, | |
1232 | int blocks, | |
1233 | int tail_cycle, | |
1234 | int tail_block) | |
1235 | { | |
1236 | xfs_caddr_t offset; | |
1237 | xfs_buf_t *bp; | |
1238 | int balign, ealign; | |
69ce58f0 | 1239 | int sectbb = log->l_sectBBsize; |
1da177e4 LT |
1240 | int end_block = start_block + blocks; |
1241 | int bufblks; | |
1242 | int error = 0; | |
1243 | int i, j = 0; | |
1244 | ||
6881a229 AE |
1245 | /* |
1246 | * Greedily allocate a buffer big enough to handle the full | |
1247 | * range of basic blocks to be written. If that fails, try | |
1248 | * a smaller size. We need to be able to write at least a | |
1249 | * log sector, or we're out of luck. | |
1250 | */ | |
1da177e4 | 1251 | bufblks = 1 << ffs(blocks); |
81158e0c DC |
1252 | while (bufblks > log->l_logBBsize) |
1253 | bufblks >>= 1; | |
1da177e4 LT |
1254 | while (!(bp = xlog_get_bp(log, bufblks))) { |
1255 | bufblks >>= 1; | |
69ce58f0 | 1256 | if (bufblks < sectbb) |
1da177e4 LT |
1257 | return ENOMEM; |
1258 | } | |
1259 | ||
1260 | /* We may need to do a read at the start to fill in part of | |
1261 | * the buffer in the starting sector not covered by the first | |
1262 | * write below. | |
1263 | */ | |
5c17f533 | 1264 | balign = round_down(start_block, sectbb); |
1da177e4 | 1265 | if (balign != start_block) { |
076e6acb CH |
1266 | error = xlog_bread_noalign(log, start_block, 1, bp); |
1267 | if (error) | |
1268 | goto out_put_bp; | |
1269 | ||
1da177e4 LT |
1270 | j = start_block - balign; |
1271 | } | |
1272 | ||
1273 | for (i = start_block; i < end_block; i += bufblks) { | |
1274 | int bcount, endcount; | |
1275 | ||
1276 | bcount = min(bufblks, end_block - start_block); | |
1277 | endcount = bcount - j; | |
1278 | ||
1279 | /* We may need to do a read at the end to fill in part of | |
1280 | * the buffer in the final sector not covered by the write. | |
1281 | * If this is the same sector as the above read, skip it. | |
1282 | */ | |
5c17f533 | 1283 | ealign = round_down(end_block, sectbb); |
1da177e4 | 1284 | if (j == 0 && (start_block + endcount > ealign)) { |
62926044 | 1285 | offset = bp->b_addr + BBTOB(ealign - start_block); |
44396476 DC |
1286 | error = xlog_bread_offset(log, ealign, sectbb, |
1287 | bp, offset); | |
076e6acb CH |
1288 | if (error) |
1289 | break; | |
1290 | ||
1da177e4 LT |
1291 | } |
1292 | ||
1293 | offset = xlog_align(log, start_block, endcount, bp); | |
1294 | for (; j < endcount; j++) { | |
1295 | xlog_add_record(log, offset, cycle, i+j, | |
1296 | tail_cycle, tail_block); | |
1297 | offset += BBSIZE; | |
1298 | } | |
1299 | error = xlog_bwrite(log, start_block, endcount, bp); | |
1300 | if (error) | |
1301 | break; | |
1302 | start_block += endcount; | |
1303 | j = 0; | |
1304 | } | |
076e6acb CH |
1305 | |
1306 | out_put_bp: | |
1da177e4 LT |
1307 | xlog_put_bp(bp); |
1308 | return error; | |
1309 | } | |
1310 | ||
1311 | /* | |
1312 | * This routine is called to blow away any incomplete log writes out | |
1313 | * in front of the log head. We do this so that we won't become confused | |
1314 | * if we come up, write only a little bit more, and then crash again. | |
1315 | * If we leave the partial log records out there, this situation could | |
1316 | * cause us to think those partial writes are valid blocks since they | |
1317 | * have the current cycle number. We get rid of them by overwriting them | |
1318 | * with empty log records with the old cycle number rather than the | |
1319 | * current one. | |
1320 | * | |
1321 | * The tail lsn is passed in rather than taken from | |
1322 | * the log so that we will not write over the unmount record after a | |
1323 | * clean unmount in a 512 block log. Doing so would leave the log without | |
1324 | * any valid log records in it until a new one was written. If we crashed | |
1325 | * during that time we would not be able to recover. | |
1326 | */ | |
1327 | STATIC int | |
1328 | xlog_clear_stale_blocks( | |
9a8d2fdb | 1329 | struct xlog *log, |
1da177e4 LT |
1330 | xfs_lsn_t tail_lsn) |
1331 | { | |
1332 | int tail_cycle, head_cycle; | |
1333 | int tail_block, head_block; | |
1334 | int tail_distance, max_distance; | |
1335 | int distance; | |
1336 | int error; | |
1337 | ||
1338 | tail_cycle = CYCLE_LSN(tail_lsn); | |
1339 | tail_block = BLOCK_LSN(tail_lsn); | |
1340 | head_cycle = log->l_curr_cycle; | |
1341 | head_block = log->l_curr_block; | |
1342 | ||
1343 | /* | |
1344 | * Figure out the distance between the new head of the log | |
1345 | * and the tail. We want to write over any blocks beyond the | |
1346 | * head that we may have written just before the crash, but | |
1347 | * we don't want to overwrite the tail of the log. | |
1348 | */ | |
1349 | if (head_cycle == tail_cycle) { | |
1350 | /* | |
1351 | * The tail is behind the head in the physical log, | |
1352 | * so the distance from the head to the tail is the | |
1353 | * distance from the head to the end of the log plus | |
1354 | * the distance from the beginning of the log to the | |
1355 | * tail. | |
1356 | */ | |
1357 | if (unlikely(head_block < tail_block || head_block >= log->l_logBBsize)) { | |
1358 | XFS_ERROR_REPORT("xlog_clear_stale_blocks(1)", | |
1359 | XFS_ERRLEVEL_LOW, log->l_mp); | |
1360 | return XFS_ERROR(EFSCORRUPTED); | |
1361 | } | |
1362 | tail_distance = tail_block + (log->l_logBBsize - head_block); | |
1363 | } else { | |
1364 | /* | |
1365 | * The head is behind the tail in the physical log, | |
1366 | * so the distance from the head to the tail is just | |
1367 | * the tail block minus the head block. | |
1368 | */ | |
1369 | if (unlikely(head_block >= tail_block || head_cycle != (tail_cycle + 1))){ | |
1370 | XFS_ERROR_REPORT("xlog_clear_stale_blocks(2)", | |
1371 | XFS_ERRLEVEL_LOW, log->l_mp); | |
1372 | return XFS_ERROR(EFSCORRUPTED); | |
1373 | } | |
1374 | tail_distance = tail_block - head_block; | |
1375 | } | |
1376 | ||
1377 | /* | |
1378 | * If the head is right up against the tail, we can't clear | |
1379 | * anything. | |
1380 | */ | |
1381 | if (tail_distance <= 0) { | |
1382 | ASSERT(tail_distance == 0); | |
1383 | return 0; | |
1384 | } | |
1385 | ||
1386 | max_distance = XLOG_TOTAL_REC_SHIFT(log); | |
1387 | /* | |
1388 | * Take the smaller of the maximum amount of outstanding I/O | |
1389 | * we could have and the distance to the tail to clear out. | |
1390 | * We take the smaller so that we don't overwrite the tail and | |
1391 | * we don't waste all day writing from the head to the tail | |
1392 | * for no reason. | |
1393 | */ | |
1394 | max_distance = MIN(max_distance, tail_distance); | |
1395 | ||
1396 | if ((head_block + max_distance) <= log->l_logBBsize) { | |
1397 | /* | |
1398 | * We can stomp all the blocks we need to without | |
1399 | * wrapping around the end of the log. Just do it | |
1400 | * in a single write. Use the cycle number of the | |
1401 | * current cycle minus one so that the log will look like: | |
1402 | * n ... | n - 1 ... | |
1403 | */ | |
1404 | error = xlog_write_log_records(log, (head_cycle - 1), | |
1405 | head_block, max_distance, tail_cycle, | |
1406 | tail_block); | |
1407 | if (error) | |
1408 | return error; | |
1409 | } else { | |
1410 | /* | |
1411 | * We need to wrap around the end of the physical log in | |
1412 | * order to clear all the blocks. Do it in two separate | |
1413 | * I/Os. The first write should be from the head to the | |
1414 | * end of the physical log, and it should use the current | |
1415 | * cycle number minus one just like above. | |
1416 | */ | |
1417 | distance = log->l_logBBsize - head_block; | |
1418 | error = xlog_write_log_records(log, (head_cycle - 1), | |
1419 | head_block, distance, tail_cycle, | |
1420 | tail_block); | |
1421 | ||
1422 | if (error) | |
1423 | return error; | |
1424 | ||
1425 | /* | |
1426 | * Now write the blocks at the start of the physical log. | |
1427 | * This writes the remainder of the blocks we want to clear. | |
1428 | * It uses the current cycle number since we're now on the | |
1429 | * same cycle as the head so that we get: | |
1430 | * n ... n ... | n - 1 ... | |
1431 | * ^^^^^ blocks we're writing | |
1432 | */ | |
1433 | distance = max_distance - (log->l_logBBsize - head_block); | |
1434 | error = xlog_write_log_records(log, head_cycle, 0, distance, | |
1435 | tail_cycle, tail_block); | |
1436 | if (error) | |
1437 | return error; | |
1438 | } | |
1439 | ||
1440 | return 0; | |
1441 | } | |
1442 | ||
1443 | /****************************************************************************** | |
1444 | * | |
1445 | * Log recover routines | |
1446 | * | |
1447 | ****************************************************************************** | |
1448 | */ | |
1449 | ||
1450 | STATIC xlog_recover_t * | |
1451 | xlog_recover_find_tid( | |
f0a76953 | 1452 | struct hlist_head *head, |
1da177e4 LT |
1453 | xlog_tid_t tid) |
1454 | { | |
f0a76953 | 1455 | xlog_recover_t *trans; |
1da177e4 | 1456 | |
b67bfe0d | 1457 | hlist_for_each_entry(trans, head, r_list) { |
f0a76953 DC |
1458 | if (trans->r_log_tid == tid) |
1459 | return trans; | |
1da177e4 | 1460 | } |
f0a76953 | 1461 | return NULL; |
1da177e4 LT |
1462 | } |
1463 | ||
1464 | STATIC void | |
f0a76953 DC |
1465 | xlog_recover_new_tid( |
1466 | struct hlist_head *head, | |
1467 | xlog_tid_t tid, | |
1468 | xfs_lsn_t lsn) | |
1da177e4 | 1469 | { |
f0a76953 DC |
1470 | xlog_recover_t *trans; |
1471 | ||
1472 | trans = kmem_zalloc(sizeof(xlog_recover_t), KM_SLEEP); | |
1473 | trans->r_log_tid = tid; | |
1474 | trans->r_lsn = lsn; | |
1475 | INIT_LIST_HEAD(&trans->r_itemq); | |
1476 | ||
1477 | INIT_HLIST_NODE(&trans->r_list); | |
1478 | hlist_add_head(&trans->r_list, head); | |
1da177e4 LT |
1479 | } |
1480 | ||
1481 | STATIC void | |
1482 | xlog_recover_add_item( | |
f0a76953 | 1483 | struct list_head *head) |
1da177e4 LT |
1484 | { |
1485 | xlog_recover_item_t *item; | |
1486 | ||
1487 | item = kmem_zalloc(sizeof(xlog_recover_item_t), KM_SLEEP); | |
f0a76953 DC |
1488 | INIT_LIST_HEAD(&item->ri_list); |
1489 | list_add_tail(&item->ri_list, head); | |
1da177e4 LT |
1490 | } |
1491 | ||
1492 | STATIC int | |
1493 | xlog_recover_add_to_cont_trans( | |
ad223e60 MT |
1494 | struct xlog *log, |
1495 | struct xlog_recover *trans, | |
1da177e4 LT |
1496 | xfs_caddr_t dp, |
1497 | int len) | |
1498 | { | |
1499 | xlog_recover_item_t *item; | |
1500 | xfs_caddr_t ptr, old_ptr; | |
1501 | int old_len; | |
1502 | ||
f0a76953 | 1503 | if (list_empty(&trans->r_itemq)) { |
1da177e4 LT |
1504 | /* finish copying rest of trans header */ |
1505 | xlog_recover_add_item(&trans->r_itemq); | |
1506 | ptr = (xfs_caddr_t) &trans->r_theader + | |
1507 | sizeof(xfs_trans_header_t) - len; | |
1508 | memcpy(ptr, dp, len); /* d, s, l */ | |
1509 | return 0; | |
1510 | } | |
f0a76953 DC |
1511 | /* take the tail entry */ |
1512 | item = list_entry(trans->r_itemq.prev, xlog_recover_item_t, ri_list); | |
1da177e4 LT |
1513 | |
1514 | old_ptr = item->ri_buf[item->ri_cnt-1].i_addr; | |
1515 | old_len = item->ri_buf[item->ri_cnt-1].i_len; | |
1516 | ||
45053603 | 1517 | ptr = kmem_realloc(old_ptr, len+old_len, old_len, KM_SLEEP); |
1da177e4 LT |
1518 | memcpy(&ptr[old_len], dp, len); /* d, s, l */ |
1519 | item->ri_buf[item->ri_cnt-1].i_len += len; | |
1520 | item->ri_buf[item->ri_cnt-1].i_addr = ptr; | |
9abbc539 | 1521 | trace_xfs_log_recover_item_add_cont(log, trans, item, 0); |
1da177e4 LT |
1522 | return 0; |
1523 | } | |
1524 | ||
1525 | /* | |
1526 | * The next region to add is the start of a new region. It could be | |
1527 | * a whole region or it could be the first part of a new region. Because | |
1528 | * of this, the assumption here is that the type and size fields of all | |
1529 | * format structures fit into the first 32 bits of the structure. | |
1530 | * | |
1531 | * This works because all regions must be 32 bit aligned. Therefore, we | |
1532 | * either have both fields or we have neither field. In the case we have | |
1533 | * neither field, the data part of the region is zero length. We only have | |
1534 | * a log_op_header and can throw away the header since a new one will appear | |
1535 | * later. If we have at least 4 bytes, then we can determine how many regions | |
1536 | * will appear in the current log item. | |
1537 | */ | |
1538 | STATIC int | |
1539 | xlog_recover_add_to_trans( | |
ad223e60 MT |
1540 | struct xlog *log, |
1541 | struct xlog_recover *trans, | |
1da177e4 LT |
1542 | xfs_caddr_t dp, |
1543 | int len) | |
1544 | { | |
1545 | xfs_inode_log_format_t *in_f; /* any will do */ | |
1546 | xlog_recover_item_t *item; | |
1547 | xfs_caddr_t ptr; | |
1548 | ||
1549 | if (!len) | |
1550 | return 0; | |
f0a76953 | 1551 | if (list_empty(&trans->r_itemq)) { |
5a792c45 DC |
1552 | /* we need to catch log corruptions here */ |
1553 | if (*(uint *)dp != XFS_TRANS_HEADER_MAGIC) { | |
a0fa2b67 DC |
1554 | xfs_warn(log->l_mp, "%s: bad header magic number", |
1555 | __func__); | |
5a792c45 DC |
1556 | ASSERT(0); |
1557 | return XFS_ERROR(EIO); | |
1558 | } | |
1da177e4 LT |
1559 | if (len == sizeof(xfs_trans_header_t)) |
1560 | xlog_recover_add_item(&trans->r_itemq); | |
1561 | memcpy(&trans->r_theader, dp, len); /* d, s, l */ | |
1562 | return 0; | |
1563 | } | |
1564 | ||
1565 | ptr = kmem_alloc(len, KM_SLEEP); | |
1566 | memcpy(ptr, dp, len); | |
1567 | in_f = (xfs_inode_log_format_t *)ptr; | |
1568 | ||
f0a76953 DC |
1569 | /* take the tail entry */ |
1570 | item = list_entry(trans->r_itemq.prev, xlog_recover_item_t, ri_list); | |
1571 | if (item->ri_total != 0 && | |
1572 | item->ri_total == item->ri_cnt) { | |
1573 | /* tail item is in use, get a new one */ | |
1da177e4 | 1574 | xlog_recover_add_item(&trans->r_itemq); |
f0a76953 DC |
1575 | item = list_entry(trans->r_itemq.prev, |
1576 | xlog_recover_item_t, ri_list); | |
1da177e4 | 1577 | } |
1da177e4 LT |
1578 | |
1579 | if (item->ri_total == 0) { /* first region to be added */ | |
e8fa6b48 CH |
1580 | if (in_f->ilf_size == 0 || |
1581 | in_f->ilf_size > XLOG_MAX_REGIONS_IN_ITEM) { | |
a0fa2b67 DC |
1582 | xfs_warn(log->l_mp, |
1583 | "bad number of regions (%d) in inode log format", | |
e8fa6b48 CH |
1584 | in_f->ilf_size); |
1585 | ASSERT(0); | |
aaaae980 | 1586 | kmem_free(ptr); |
e8fa6b48 CH |
1587 | return XFS_ERROR(EIO); |
1588 | } | |
1589 | ||
1590 | item->ri_total = in_f->ilf_size; | |
1591 | item->ri_buf = | |
1592 | kmem_zalloc(item->ri_total * sizeof(xfs_log_iovec_t), | |
1593 | KM_SLEEP); | |
1da177e4 LT |
1594 | } |
1595 | ASSERT(item->ri_total > item->ri_cnt); | |
1596 | /* Description region is ri_buf[0] */ | |
1597 | item->ri_buf[item->ri_cnt].i_addr = ptr; | |
1598 | item->ri_buf[item->ri_cnt].i_len = len; | |
1599 | item->ri_cnt++; | |
9abbc539 | 1600 | trace_xfs_log_recover_item_add(log, trans, item, 0); |
1da177e4 LT |
1601 | return 0; |
1602 | } | |
1603 | ||
f0a76953 | 1604 | /* |
a775ad77 DC |
1605 | * Sort the log items in the transaction. |
1606 | * | |
1607 | * The ordering constraints are defined by the inode allocation and unlink | |
1608 | * behaviour. The rules are: | |
1609 | * | |
1610 | * 1. Every item is only logged once in a given transaction. Hence it | |
1611 | * represents the last logged state of the item. Hence ordering is | |
1612 | * dependent on the order in which operations need to be performed so | |
1613 | * required initial conditions are always met. | |
1614 | * | |
1615 | * 2. Cancelled buffers are recorded in pass 1 in a separate table and | |
1616 | * there's nothing to replay from them so we can simply cull them | |
1617 | * from the transaction. However, we can't do that until after we've | |
1618 | * replayed all the other items because they may be dependent on the | |
1619 | * cancelled buffer and replaying the cancelled buffer can remove it | |
1620 | * form the cancelled buffer table. Hence they have tobe done last. | |
1621 | * | |
1622 | * 3. Inode allocation buffers must be replayed before inode items that | |
28c8e41a DC |
1623 | * read the buffer and replay changes into it. For filesystems using the |
1624 | * ICREATE transactions, this means XFS_LI_ICREATE objects need to get | |
1625 | * treated the same as inode allocation buffers as they create and | |
1626 | * initialise the buffers directly. | |
a775ad77 DC |
1627 | * |
1628 | * 4. Inode unlink buffers must be replayed after inode items are replayed. | |
1629 | * This ensures that inodes are completely flushed to the inode buffer | |
1630 | * in a "free" state before we remove the unlinked inode list pointer. | |
1631 | * | |
1632 | * Hence the ordering needs to be inode allocation buffers first, inode items | |
1633 | * second, inode unlink buffers third and cancelled buffers last. | |
1634 | * | |
1635 | * But there's a problem with that - we can't tell an inode allocation buffer | |
1636 | * apart from a regular buffer, so we can't separate them. We can, however, | |
1637 | * tell an inode unlink buffer from the others, and so we can separate them out | |
1638 | * from all the other buffers and move them to last. | |
1639 | * | |
1640 | * Hence, 4 lists, in order from head to tail: | |
28c8e41a DC |
1641 | * - buffer_list for all buffers except cancelled/inode unlink buffers |
1642 | * - item_list for all non-buffer items | |
1643 | * - inode_buffer_list for inode unlink buffers | |
1644 | * - cancel_list for the cancelled buffers | |
1645 | * | |
1646 | * Note that we add objects to the tail of the lists so that first-to-last | |
1647 | * ordering is preserved within the lists. Adding objects to the head of the | |
1648 | * list means when we traverse from the head we walk them in last-to-first | |
1649 | * order. For cancelled buffers and inode unlink buffers this doesn't matter, | |
1650 | * but for all other items there may be specific ordering that we need to | |
1651 | * preserve. | |
f0a76953 | 1652 | */ |
1da177e4 LT |
1653 | STATIC int |
1654 | xlog_recover_reorder_trans( | |
ad223e60 MT |
1655 | struct xlog *log, |
1656 | struct xlog_recover *trans, | |
9abbc539 | 1657 | int pass) |
1da177e4 | 1658 | { |
f0a76953 DC |
1659 | xlog_recover_item_t *item, *n; |
1660 | LIST_HEAD(sort_list); | |
a775ad77 DC |
1661 | LIST_HEAD(cancel_list); |
1662 | LIST_HEAD(buffer_list); | |
1663 | LIST_HEAD(inode_buffer_list); | |
1664 | LIST_HEAD(inode_list); | |
f0a76953 DC |
1665 | |
1666 | list_splice_init(&trans->r_itemq, &sort_list); | |
1667 | list_for_each_entry_safe(item, n, &sort_list, ri_list) { | |
4e0d5f92 | 1668 | xfs_buf_log_format_t *buf_f = item->ri_buf[0].i_addr; |
1da177e4 | 1669 | |
f0a76953 | 1670 | switch (ITEM_TYPE(item)) { |
28c8e41a DC |
1671 | case XFS_LI_ICREATE: |
1672 | list_move_tail(&item->ri_list, &buffer_list); | |
1673 | break; | |
1da177e4 | 1674 | case XFS_LI_BUF: |
a775ad77 | 1675 | if (buf_f->blf_flags & XFS_BLF_CANCEL) { |
9abbc539 DC |
1676 | trace_xfs_log_recover_item_reorder_head(log, |
1677 | trans, item, pass); | |
a775ad77 | 1678 | list_move(&item->ri_list, &cancel_list); |
1da177e4 LT |
1679 | break; |
1680 | } | |
a775ad77 DC |
1681 | if (buf_f->blf_flags & XFS_BLF_INODE_BUF) { |
1682 | list_move(&item->ri_list, &inode_buffer_list); | |
1683 | break; | |
1684 | } | |
1685 | list_move_tail(&item->ri_list, &buffer_list); | |
1686 | break; | |
1da177e4 | 1687 | case XFS_LI_INODE: |
1da177e4 LT |
1688 | case XFS_LI_DQUOT: |
1689 | case XFS_LI_QUOTAOFF: | |
1690 | case XFS_LI_EFD: | |
1691 | case XFS_LI_EFI: | |
9abbc539 DC |
1692 | trace_xfs_log_recover_item_reorder_tail(log, |
1693 | trans, item, pass); | |
a775ad77 | 1694 | list_move_tail(&item->ri_list, &inode_list); |
1da177e4 LT |
1695 | break; |
1696 | default: | |
a0fa2b67 DC |
1697 | xfs_warn(log->l_mp, |
1698 | "%s: unrecognized type of log operation", | |
1699 | __func__); | |
1da177e4 LT |
1700 | ASSERT(0); |
1701 | return XFS_ERROR(EIO); | |
1702 | } | |
f0a76953 DC |
1703 | } |
1704 | ASSERT(list_empty(&sort_list)); | |
a775ad77 DC |
1705 | if (!list_empty(&buffer_list)) |
1706 | list_splice(&buffer_list, &trans->r_itemq); | |
1707 | if (!list_empty(&inode_list)) | |
1708 | list_splice_tail(&inode_list, &trans->r_itemq); | |
1709 | if (!list_empty(&inode_buffer_list)) | |
1710 | list_splice_tail(&inode_buffer_list, &trans->r_itemq); | |
1711 | if (!list_empty(&cancel_list)) | |
1712 | list_splice_tail(&cancel_list, &trans->r_itemq); | |
1da177e4 LT |
1713 | return 0; |
1714 | } | |
1715 | ||
1716 | /* | |
1717 | * Build up the table of buf cancel records so that we don't replay | |
1718 | * cancelled data in the second pass. For buffer records that are | |
1719 | * not cancel records, there is nothing to do here so we just return. | |
1720 | * | |
1721 | * If we get a cancel record which is already in the table, this indicates | |
1722 | * that the buffer was cancelled multiple times. In order to ensure | |
1723 | * that during pass 2 we keep the record in the table until we reach its | |
1724 | * last occurrence in the log, we keep a reference count in the cancel | |
1725 | * record in the table to tell us how many times we expect to see this | |
1726 | * record during the second pass. | |
1727 | */ | |
c9f71f5f CH |
1728 | STATIC int |
1729 | xlog_recover_buffer_pass1( | |
ad223e60 MT |
1730 | struct xlog *log, |
1731 | struct xlog_recover_item *item) | |
1da177e4 | 1732 | { |
c9f71f5f | 1733 | xfs_buf_log_format_t *buf_f = item->ri_buf[0].i_addr; |
d5689eaa CH |
1734 | struct list_head *bucket; |
1735 | struct xfs_buf_cancel *bcp; | |
1da177e4 LT |
1736 | |
1737 | /* | |
1738 | * If this isn't a cancel buffer item, then just return. | |
1739 | */ | |
e2714bf8 | 1740 | if (!(buf_f->blf_flags & XFS_BLF_CANCEL)) { |
9abbc539 | 1741 | trace_xfs_log_recover_buf_not_cancel(log, buf_f); |
c9f71f5f | 1742 | return 0; |
9abbc539 | 1743 | } |
1da177e4 LT |
1744 | |
1745 | /* | |
d5689eaa CH |
1746 | * Insert an xfs_buf_cancel record into the hash table of them. |
1747 | * If there is already an identical record, bump its reference count. | |
1da177e4 | 1748 | */ |
d5689eaa CH |
1749 | bucket = XLOG_BUF_CANCEL_BUCKET(log, buf_f->blf_blkno); |
1750 | list_for_each_entry(bcp, bucket, bc_list) { | |
1751 | if (bcp->bc_blkno == buf_f->blf_blkno && | |
1752 | bcp->bc_len == buf_f->blf_len) { | |
1753 | bcp->bc_refcount++; | |
9abbc539 | 1754 | trace_xfs_log_recover_buf_cancel_ref_inc(log, buf_f); |
c9f71f5f | 1755 | return 0; |
1da177e4 | 1756 | } |
d5689eaa CH |
1757 | } |
1758 | ||
1759 | bcp = kmem_alloc(sizeof(struct xfs_buf_cancel), KM_SLEEP); | |
1760 | bcp->bc_blkno = buf_f->blf_blkno; | |
1761 | bcp->bc_len = buf_f->blf_len; | |
1da177e4 | 1762 | bcp->bc_refcount = 1; |
d5689eaa CH |
1763 | list_add_tail(&bcp->bc_list, bucket); |
1764 | ||
9abbc539 | 1765 | trace_xfs_log_recover_buf_cancel_add(log, buf_f); |
c9f71f5f | 1766 | return 0; |
1da177e4 LT |
1767 | } |
1768 | ||
1769 | /* | |
1770 | * Check to see whether the buffer being recovered has a corresponding | |
84a5b730 DC |
1771 | * entry in the buffer cancel record table. If it is, return the cancel |
1772 | * buffer structure to the caller. | |
1da177e4 | 1773 | */ |
84a5b730 DC |
1774 | STATIC struct xfs_buf_cancel * |
1775 | xlog_peek_buffer_cancelled( | |
ad223e60 | 1776 | struct xlog *log, |
1da177e4 LT |
1777 | xfs_daddr_t blkno, |
1778 | uint len, | |
1779 | ushort flags) | |
1780 | { | |
d5689eaa CH |
1781 | struct list_head *bucket; |
1782 | struct xfs_buf_cancel *bcp; | |
1da177e4 | 1783 | |
84a5b730 DC |
1784 | if (!log->l_buf_cancel_table) { |
1785 | /* empty table means no cancelled buffers in the log */ | |
c1155410 | 1786 | ASSERT(!(flags & XFS_BLF_CANCEL)); |
84a5b730 | 1787 | return NULL; |
1da177e4 LT |
1788 | } |
1789 | ||
d5689eaa CH |
1790 | bucket = XLOG_BUF_CANCEL_BUCKET(log, blkno); |
1791 | list_for_each_entry(bcp, bucket, bc_list) { | |
1792 | if (bcp->bc_blkno == blkno && bcp->bc_len == len) | |
84a5b730 | 1793 | return bcp; |
1da177e4 | 1794 | } |
d5689eaa | 1795 | |
1da177e4 | 1796 | /* |
d5689eaa CH |
1797 | * We didn't find a corresponding entry in the table, so return 0 so |
1798 | * that the buffer is NOT cancelled. | |
1da177e4 | 1799 | */ |
c1155410 | 1800 | ASSERT(!(flags & XFS_BLF_CANCEL)); |
84a5b730 DC |
1801 | return NULL; |
1802 | } | |
1803 | ||
1804 | /* | |
1805 | * If the buffer is being cancelled then return 1 so that it will be cancelled, | |
1806 | * otherwise return 0. If the buffer is actually a buffer cancel item | |
1807 | * (XFS_BLF_CANCEL is set), then decrement the refcount on the entry in the | |
1808 | * table and remove it from the table if this is the last reference. | |
1809 | * | |
1810 | * We remove the cancel record from the table when we encounter its last | |
1811 | * occurrence in the log so that if the same buffer is re-used again after its | |
1812 | * last cancellation we actually replay the changes made at that point. | |
1813 | */ | |
1814 | STATIC int | |
1815 | xlog_check_buffer_cancelled( | |
1816 | struct xlog *log, | |
1817 | xfs_daddr_t blkno, | |
1818 | uint len, | |
1819 | ushort flags) | |
1820 | { | |
1821 | struct xfs_buf_cancel *bcp; | |
1822 | ||
1823 | bcp = xlog_peek_buffer_cancelled(log, blkno, len, flags); | |
1824 | if (!bcp) | |
1825 | return 0; | |
d5689eaa | 1826 | |
d5689eaa CH |
1827 | /* |
1828 | * We've go a match, so return 1 so that the recovery of this buffer | |
1829 | * is cancelled. If this buffer is actually a buffer cancel log | |
1830 | * item, then decrement the refcount on the one in the table and | |
1831 | * remove it if this is the last reference. | |
1832 | */ | |
1833 | if (flags & XFS_BLF_CANCEL) { | |
1834 | if (--bcp->bc_refcount == 0) { | |
1835 | list_del(&bcp->bc_list); | |
1836 | kmem_free(bcp); | |
1837 | } | |
1838 | } | |
1839 | return 1; | |
1da177e4 LT |
1840 | } |
1841 | ||
1da177e4 | 1842 | /* |
e2714bf8 CH |
1843 | * Perform recovery for a buffer full of inodes. In these buffers, the only |
1844 | * data which should be recovered is that which corresponds to the | |
1845 | * di_next_unlinked pointers in the on disk inode structures. The rest of the | |
1846 | * data for the inodes is always logged through the inodes themselves rather | |
1847 | * than the inode buffer and is recovered in xlog_recover_inode_pass2(). | |
1da177e4 | 1848 | * |
e2714bf8 CH |
1849 | * The only time when buffers full of inodes are fully recovered is when the |
1850 | * buffer is full of newly allocated inodes. In this case the buffer will | |
1851 | * not be marked as an inode buffer and so will be sent to | |
1852 | * xlog_recover_do_reg_buffer() below during recovery. | |
1da177e4 LT |
1853 | */ |
1854 | STATIC int | |
1855 | xlog_recover_do_inode_buffer( | |
e2714bf8 | 1856 | struct xfs_mount *mp, |
1da177e4 | 1857 | xlog_recover_item_t *item, |
e2714bf8 | 1858 | struct xfs_buf *bp, |
1da177e4 LT |
1859 | xfs_buf_log_format_t *buf_f) |
1860 | { | |
1861 | int i; | |
e2714bf8 CH |
1862 | int item_index = 0; |
1863 | int bit = 0; | |
1864 | int nbits = 0; | |
1865 | int reg_buf_offset = 0; | |
1866 | int reg_buf_bytes = 0; | |
1da177e4 LT |
1867 | int next_unlinked_offset; |
1868 | int inodes_per_buf; | |
1869 | xfs_agino_t *logged_nextp; | |
1870 | xfs_agino_t *buffer_nextp; | |
1da177e4 | 1871 | |
9abbc539 | 1872 | trace_xfs_log_recover_buf_inode_buf(mp->m_log, buf_f); |
9222a9cf DC |
1873 | |
1874 | /* | |
1875 | * Post recovery validation only works properly on CRC enabled | |
1876 | * filesystems. | |
1877 | */ | |
1878 | if (xfs_sb_version_hascrc(&mp->m_sb)) | |
1879 | bp->b_ops = &xfs_inode_buf_ops; | |
9abbc539 | 1880 | |
aa0e8833 | 1881 | inodes_per_buf = BBTOB(bp->b_io_length) >> mp->m_sb.sb_inodelog; |
1da177e4 LT |
1882 | for (i = 0; i < inodes_per_buf; i++) { |
1883 | next_unlinked_offset = (i * mp->m_sb.sb_inodesize) + | |
1884 | offsetof(xfs_dinode_t, di_next_unlinked); | |
1885 | ||
1886 | while (next_unlinked_offset >= | |
1887 | (reg_buf_offset + reg_buf_bytes)) { | |
1888 | /* | |
1889 | * The next di_next_unlinked field is beyond | |
1890 | * the current logged region. Find the next | |
1891 | * logged region that contains or is beyond | |
1892 | * the current di_next_unlinked field. | |
1893 | */ | |
1894 | bit += nbits; | |
e2714bf8 CH |
1895 | bit = xfs_next_bit(buf_f->blf_data_map, |
1896 | buf_f->blf_map_size, bit); | |
1da177e4 LT |
1897 | |
1898 | /* | |
1899 | * If there are no more logged regions in the | |
1900 | * buffer, then we're done. | |
1901 | */ | |
e2714bf8 | 1902 | if (bit == -1) |
1da177e4 | 1903 | return 0; |
1da177e4 | 1904 | |
e2714bf8 CH |
1905 | nbits = xfs_contig_bits(buf_f->blf_data_map, |
1906 | buf_f->blf_map_size, bit); | |
1da177e4 | 1907 | ASSERT(nbits > 0); |
c1155410 DC |
1908 | reg_buf_offset = bit << XFS_BLF_SHIFT; |
1909 | reg_buf_bytes = nbits << XFS_BLF_SHIFT; | |
1da177e4 LT |
1910 | item_index++; |
1911 | } | |
1912 | ||
1913 | /* | |
1914 | * If the current logged region starts after the current | |
1915 | * di_next_unlinked field, then move on to the next | |
1916 | * di_next_unlinked field. | |
1917 | */ | |
e2714bf8 | 1918 | if (next_unlinked_offset < reg_buf_offset) |
1da177e4 | 1919 | continue; |
1da177e4 LT |
1920 | |
1921 | ASSERT(item->ri_buf[item_index].i_addr != NULL); | |
c1155410 | 1922 | ASSERT((item->ri_buf[item_index].i_len % XFS_BLF_CHUNK) == 0); |
aa0e8833 DC |
1923 | ASSERT((reg_buf_offset + reg_buf_bytes) <= |
1924 | BBTOB(bp->b_io_length)); | |
1da177e4 LT |
1925 | |
1926 | /* | |
1927 | * The current logged region contains a copy of the | |
1928 | * current di_next_unlinked field. Extract its value | |
1929 | * and copy it to the buffer copy. | |
1930 | */ | |
4e0d5f92 CH |
1931 | logged_nextp = item->ri_buf[item_index].i_addr + |
1932 | next_unlinked_offset - reg_buf_offset; | |
1da177e4 | 1933 | if (unlikely(*logged_nextp == 0)) { |
a0fa2b67 DC |
1934 | xfs_alert(mp, |
1935 | "Bad inode buffer log record (ptr = 0x%p, bp = 0x%p). " | |
1936 | "Trying to replay bad (0) inode di_next_unlinked field.", | |
1da177e4 LT |
1937 | item, bp); |
1938 | XFS_ERROR_REPORT("xlog_recover_do_inode_buf", | |
1939 | XFS_ERRLEVEL_LOW, mp); | |
1940 | return XFS_ERROR(EFSCORRUPTED); | |
1941 | } | |
1942 | ||
1943 | buffer_nextp = (xfs_agino_t *)xfs_buf_offset(bp, | |
1944 | next_unlinked_offset); | |
87c199c2 | 1945 | *buffer_nextp = *logged_nextp; |
0a32c26e DC |
1946 | |
1947 | /* | |
1948 | * If necessary, recalculate the CRC in the on-disk inode. We | |
1949 | * have to leave the inode in a consistent state for whoever | |
1950 | * reads it next.... | |
1951 | */ | |
1952 | xfs_dinode_calc_crc(mp, (struct xfs_dinode *) | |
1953 | xfs_buf_offset(bp, i * mp->m_sb.sb_inodesize)); | |
1954 | ||
1da177e4 LT |
1955 | } |
1956 | ||
1957 | return 0; | |
1958 | } | |
1959 | ||
50d5c8d8 DC |
1960 | /* |
1961 | * V5 filesystems know the age of the buffer on disk being recovered. We can | |
1962 | * have newer objects on disk than we are replaying, and so for these cases we | |
1963 | * don't want to replay the current change as that will make the buffer contents | |
1964 | * temporarily invalid on disk. | |
1965 | * | |
1966 | * The magic number might not match the buffer type we are going to recover | |
1967 | * (e.g. reallocated blocks), so we ignore the xfs_buf_log_format flags. Hence | |
1968 | * extract the LSN of the existing object in the buffer based on it's current | |
1969 | * magic number. If we don't recognise the magic number in the buffer, then | |
1970 | * return a LSN of -1 so that the caller knows it was an unrecognised block and | |
1971 | * so can recover the buffer. | |
566055d3 DC |
1972 | * |
1973 | * Note: we cannot rely solely on magic number matches to determine that the | |
1974 | * buffer has a valid LSN - we also need to verify that it belongs to this | |
1975 | * filesystem, so we need to extract the object's LSN and compare it to that | |
1976 | * which we read from the superblock. If the UUIDs don't match, then we've got a | |
1977 | * stale metadata block from an old filesystem instance that we need to recover | |
1978 | * over the top of. | |
50d5c8d8 DC |
1979 | */ |
1980 | static xfs_lsn_t | |
1981 | xlog_recover_get_buf_lsn( | |
1982 | struct xfs_mount *mp, | |
1983 | struct xfs_buf *bp) | |
1984 | { | |
1985 | __uint32_t magic32; | |
1986 | __uint16_t magic16; | |
1987 | __uint16_t magicda; | |
1988 | void *blk = bp->b_addr; | |
566055d3 DC |
1989 | uuid_t *uuid; |
1990 | xfs_lsn_t lsn = -1; | |
50d5c8d8 DC |
1991 | |
1992 | /* v4 filesystems always recover immediately */ | |
1993 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
1994 | goto recover_immediately; | |
1995 | ||
1996 | magic32 = be32_to_cpu(*(__be32 *)blk); | |
1997 | switch (magic32) { | |
1998 | case XFS_ABTB_CRC_MAGIC: | |
1999 | case XFS_ABTC_CRC_MAGIC: | |
2000 | case XFS_ABTB_MAGIC: | |
2001 | case XFS_ABTC_MAGIC: | |
2002 | case XFS_IBT_CRC_MAGIC: | |
566055d3 DC |
2003 | case XFS_IBT_MAGIC: { |
2004 | struct xfs_btree_block *btb = blk; | |
2005 | ||
2006 | lsn = be64_to_cpu(btb->bb_u.s.bb_lsn); | |
2007 | uuid = &btb->bb_u.s.bb_uuid; | |
2008 | break; | |
2009 | } | |
50d5c8d8 | 2010 | case XFS_BMAP_CRC_MAGIC: |
566055d3 DC |
2011 | case XFS_BMAP_MAGIC: { |
2012 | struct xfs_btree_block *btb = blk; | |
2013 | ||
2014 | lsn = be64_to_cpu(btb->bb_u.l.bb_lsn); | |
2015 | uuid = &btb->bb_u.l.bb_uuid; | |
2016 | break; | |
2017 | } | |
50d5c8d8 | 2018 | case XFS_AGF_MAGIC: |
566055d3 DC |
2019 | lsn = be64_to_cpu(((struct xfs_agf *)blk)->agf_lsn); |
2020 | uuid = &((struct xfs_agf *)blk)->agf_uuid; | |
2021 | break; | |
50d5c8d8 | 2022 | case XFS_AGFL_MAGIC: |
566055d3 DC |
2023 | lsn = be64_to_cpu(((struct xfs_agfl *)blk)->agfl_lsn); |
2024 | uuid = &((struct xfs_agfl *)blk)->agfl_uuid; | |
2025 | break; | |
50d5c8d8 | 2026 | case XFS_AGI_MAGIC: |
566055d3 DC |
2027 | lsn = be64_to_cpu(((struct xfs_agi *)blk)->agi_lsn); |
2028 | uuid = &((struct xfs_agi *)blk)->agi_uuid; | |
2029 | break; | |
50d5c8d8 | 2030 | case XFS_SYMLINK_MAGIC: |
566055d3 DC |
2031 | lsn = be64_to_cpu(((struct xfs_dsymlink_hdr *)blk)->sl_lsn); |
2032 | uuid = &((struct xfs_dsymlink_hdr *)blk)->sl_uuid; | |
2033 | break; | |
50d5c8d8 DC |
2034 | case XFS_DIR3_BLOCK_MAGIC: |
2035 | case XFS_DIR3_DATA_MAGIC: | |
2036 | case XFS_DIR3_FREE_MAGIC: | |
566055d3 DC |
2037 | lsn = be64_to_cpu(((struct xfs_dir3_blk_hdr *)blk)->lsn); |
2038 | uuid = &((struct xfs_dir3_blk_hdr *)blk)->uuid; | |
2039 | break; | |
50d5c8d8 | 2040 | case XFS_ATTR3_RMT_MAGIC: |
566055d3 DC |
2041 | lsn = be64_to_cpu(((struct xfs_attr3_rmt_hdr *)blk)->rm_lsn); |
2042 | uuid = &((struct xfs_attr3_rmt_hdr *)blk)->rm_uuid; | |
2043 | break; | |
50d5c8d8 | 2044 | case XFS_SB_MAGIC: |
566055d3 DC |
2045 | lsn = be64_to_cpu(((struct xfs_dsb *)blk)->sb_lsn); |
2046 | uuid = &((struct xfs_dsb *)blk)->sb_uuid; | |
2047 | break; | |
50d5c8d8 DC |
2048 | default: |
2049 | break; | |
2050 | } | |
2051 | ||
566055d3 DC |
2052 | if (lsn != (xfs_lsn_t)-1) { |
2053 | if (!uuid_equal(&mp->m_sb.sb_uuid, uuid)) | |
2054 | goto recover_immediately; | |
2055 | return lsn; | |
2056 | } | |
2057 | ||
50d5c8d8 DC |
2058 | magicda = be16_to_cpu(((struct xfs_da_blkinfo *)blk)->magic); |
2059 | switch (magicda) { | |
2060 | case XFS_DIR3_LEAF1_MAGIC: | |
2061 | case XFS_DIR3_LEAFN_MAGIC: | |
2062 | case XFS_DA3_NODE_MAGIC: | |
566055d3 DC |
2063 | lsn = be64_to_cpu(((struct xfs_da3_blkinfo *)blk)->lsn); |
2064 | uuid = &((struct xfs_da3_blkinfo *)blk)->uuid; | |
2065 | break; | |
50d5c8d8 DC |
2066 | default: |
2067 | break; | |
2068 | } | |
2069 | ||
566055d3 DC |
2070 | if (lsn != (xfs_lsn_t)-1) { |
2071 | if (!uuid_equal(&mp->m_sb.sb_uuid, uuid)) | |
2072 | goto recover_immediately; | |
2073 | return lsn; | |
2074 | } | |
2075 | ||
50d5c8d8 DC |
2076 | /* |
2077 | * We do individual object checks on dquot and inode buffers as they | |
2078 | * have their own individual LSN records. Also, we could have a stale | |
2079 | * buffer here, so we have to at least recognise these buffer types. | |
2080 | * | |
2081 | * A notd complexity here is inode unlinked list processing - it logs | |
2082 | * the inode directly in the buffer, but we don't know which inodes have | |
2083 | * been modified, and there is no global buffer LSN. Hence we need to | |
2084 | * recover all inode buffer types immediately. This problem will be | |
2085 | * fixed by logical logging of the unlinked list modifications. | |
2086 | */ | |
2087 | magic16 = be16_to_cpu(*(__be16 *)blk); | |
2088 | switch (magic16) { | |
2089 | case XFS_DQUOT_MAGIC: | |
2090 | case XFS_DINODE_MAGIC: | |
2091 | goto recover_immediately; | |
2092 | default: | |
2093 | break; | |
2094 | } | |
2095 | ||
2096 | /* unknown buffer contents, recover immediately */ | |
2097 | ||
2098 | recover_immediately: | |
2099 | return (xfs_lsn_t)-1; | |
2100 | ||
2101 | } | |
2102 | ||
1da177e4 | 2103 | /* |
d75afeb3 DC |
2104 | * Validate the recovered buffer is of the correct type and attach the |
2105 | * appropriate buffer operations to them for writeback. Magic numbers are in a | |
2106 | * few places: | |
2107 | * the first 16 bits of the buffer (inode buffer, dquot buffer), | |
2108 | * the first 32 bits of the buffer (most blocks), | |
2109 | * inside a struct xfs_da_blkinfo at the start of the buffer. | |
1da177e4 | 2110 | */ |
d75afeb3 | 2111 | static void |
50d5c8d8 | 2112 | xlog_recover_validate_buf_type( |
9abbc539 | 2113 | struct xfs_mount *mp, |
e2714bf8 | 2114 | struct xfs_buf *bp, |
1da177e4 LT |
2115 | xfs_buf_log_format_t *buf_f) |
2116 | { | |
d75afeb3 DC |
2117 | struct xfs_da_blkinfo *info = bp->b_addr; |
2118 | __uint32_t magic32; | |
2119 | __uint16_t magic16; | |
2120 | __uint16_t magicda; | |
2121 | ||
2122 | magic32 = be32_to_cpu(*(__be32 *)bp->b_addr); | |
2123 | magic16 = be16_to_cpu(*(__be16*)bp->b_addr); | |
2124 | magicda = be16_to_cpu(info->magic); | |
61fe135c DC |
2125 | switch (xfs_blft_from_flags(buf_f)) { |
2126 | case XFS_BLFT_BTREE_BUF: | |
d75afeb3 | 2127 | switch (magic32) { |
ee1a47ab CH |
2128 | case XFS_ABTB_CRC_MAGIC: |
2129 | case XFS_ABTC_CRC_MAGIC: | |
2130 | case XFS_ABTB_MAGIC: | |
2131 | case XFS_ABTC_MAGIC: | |
2132 | bp->b_ops = &xfs_allocbt_buf_ops; | |
2133 | break; | |
2134 | case XFS_IBT_CRC_MAGIC: | |
2135 | case XFS_IBT_MAGIC: | |
2136 | bp->b_ops = &xfs_inobt_buf_ops; | |
2137 | break; | |
2138 | case XFS_BMAP_CRC_MAGIC: | |
2139 | case XFS_BMAP_MAGIC: | |
2140 | bp->b_ops = &xfs_bmbt_buf_ops; | |
2141 | break; | |
2142 | default: | |
2143 | xfs_warn(mp, "Bad btree block magic!"); | |
2144 | ASSERT(0); | |
2145 | break; | |
2146 | } | |
2147 | break; | |
61fe135c | 2148 | case XFS_BLFT_AGF_BUF: |
d75afeb3 | 2149 | if (magic32 != XFS_AGF_MAGIC) { |
4e0e6040 DC |
2150 | xfs_warn(mp, "Bad AGF block magic!"); |
2151 | ASSERT(0); | |
2152 | break; | |
2153 | } | |
2154 | bp->b_ops = &xfs_agf_buf_ops; | |
2155 | break; | |
61fe135c | 2156 | case XFS_BLFT_AGFL_BUF: |
77c95bba CH |
2157 | if (!xfs_sb_version_hascrc(&mp->m_sb)) |
2158 | break; | |
d75afeb3 | 2159 | if (magic32 != XFS_AGFL_MAGIC) { |
77c95bba CH |
2160 | xfs_warn(mp, "Bad AGFL block magic!"); |
2161 | ASSERT(0); | |
2162 | break; | |
2163 | } | |
2164 | bp->b_ops = &xfs_agfl_buf_ops; | |
2165 | break; | |
61fe135c | 2166 | case XFS_BLFT_AGI_BUF: |
d75afeb3 | 2167 | if (magic32 != XFS_AGI_MAGIC) { |
983d09ff DC |
2168 | xfs_warn(mp, "Bad AGI block magic!"); |
2169 | ASSERT(0); | |
2170 | break; | |
2171 | } | |
2172 | bp->b_ops = &xfs_agi_buf_ops; | |
2173 | break; | |
61fe135c DC |
2174 | case XFS_BLFT_UDQUOT_BUF: |
2175 | case XFS_BLFT_PDQUOT_BUF: | |
2176 | case XFS_BLFT_GDQUOT_BUF: | |
123887e8 | 2177 | #ifdef CONFIG_XFS_QUOTA |
d75afeb3 | 2178 | if (magic16 != XFS_DQUOT_MAGIC) { |
3fe58f30 CH |
2179 | xfs_warn(mp, "Bad DQUOT block magic!"); |
2180 | ASSERT(0); | |
2181 | break; | |
2182 | } | |
2183 | bp->b_ops = &xfs_dquot_buf_ops; | |
123887e8 DC |
2184 | #else |
2185 | xfs_alert(mp, | |
2186 | "Trying to recover dquots without QUOTA support built in!"); | |
2187 | ASSERT(0); | |
2188 | #endif | |
3fe58f30 | 2189 | break; |
61fe135c | 2190 | case XFS_BLFT_DINO_BUF: |
93848a99 CH |
2191 | /* |
2192 | * we get here with inode allocation buffers, not buffers that | |
2193 | * track unlinked list changes. | |
2194 | */ | |
d75afeb3 | 2195 | if (magic16 != XFS_DINODE_MAGIC) { |
93848a99 CH |
2196 | xfs_warn(mp, "Bad INODE block magic!"); |
2197 | ASSERT(0); | |
2198 | break; | |
2199 | } | |
2200 | bp->b_ops = &xfs_inode_buf_ops; | |
2201 | break; | |
61fe135c | 2202 | case XFS_BLFT_SYMLINK_BUF: |
d75afeb3 | 2203 | if (magic32 != XFS_SYMLINK_MAGIC) { |
f948dd76 DC |
2204 | xfs_warn(mp, "Bad symlink block magic!"); |
2205 | ASSERT(0); | |
2206 | break; | |
2207 | } | |
2208 | bp->b_ops = &xfs_symlink_buf_ops; | |
2209 | break; | |
61fe135c | 2210 | case XFS_BLFT_DIR_BLOCK_BUF: |
d75afeb3 DC |
2211 | if (magic32 != XFS_DIR2_BLOCK_MAGIC && |
2212 | magic32 != XFS_DIR3_BLOCK_MAGIC) { | |
2213 | xfs_warn(mp, "Bad dir block magic!"); | |
2214 | ASSERT(0); | |
2215 | break; | |
2216 | } | |
2217 | bp->b_ops = &xfs_dir3_block_buf_ops; | |
2218 | break; | |
61fe135c | 2219 | case XFS_BLFT_DIR_DATA_BUF: |
d75afeb3 DC |
2220 | if (magic32 != XFS_DIR2_DATA_MAGIC && |
2221 | magic32 != XFS_DIR3_DATA_MAGIC) { | |
2222 | xfs_warn(mp, "Bad dir data magic!"); | |
2223 | ASSERT(0); | |
2224 | break; | |
2225 | } | |
2226 | bp->b_ops = &xfs_dir3_data_buf_ops; | |
2227 | break; | |
61fe135c | 2228 | case XFS_BLFT_DIR_FREE_BUF: |
d75afeb3 DC |
2229 | if (magic32 != XFS_DIR2_FREE_MAGIC && |
2230 | magic32 != XFS_DIR3_FREE_MAGIC) { | |
2231 | xfs_warn(mp, "Bad dir3 free magic!"); | |
2232 | ASSERT(0); | |
2233 | break; | |
2234 | } | |
2235 | bp->b_ops = &xfs_dir3_free_buf_ops; | |
2236 | break; | |
61fe135c | 2237 | case XFS_BLFT_DIR_LEAF1_BUF: |
d75afeb3 DC |
2238 | if (magicda != XFS_DIR2_LEAF1_MAGIC && |
2239 | magicda != XFS_DIR3_LEAF1_MAGIC) { | |
2240 | xfs_warn(mp, "Bad dir leaf1 magic!"); | |
2241 | ASSERT(0); | |
2242 | break; | |
2243 | } | |
2244 | bp->b_ops = &xfs_dir3_leaf1_buf_ops; | |
2245 | break; | |
61fe135c | 2246 | case XFS_BLFT_DIR_LEAFN_BUF: |
d75afeb3 DC |
2247 | if (magicda != XFS_DIR2_LEAFN_MAGIC && |
2248 | magicda != XFS_DIR3_LEAFN_MAGIC) { | |
2249 | xfs_warn(mp, "Bad dir leafn magic!"); | |
2250 | ASSERT(0); | |
2251 | break; | |
2252 | } | |
2253 | bp->b_ops = &xfs_dir3_leafn_buf_ops; | |
2254 | break; | |
61fe135c | 2255 | case XFS_BLFT_DA_NODE_BUF: |
d75afeb3 DC |
2256 | if (magicda != XFS_DA_NODE_MAGIC && |
2257 | magicda != XFS_DA3_NODE_MAGIC) { | |
2258 | xfs_warn(mp, "Bad da node magic!"); | |
2259 | ASSERT(0); | |
2260 | break; | |
2261 | } | |
2262 | bp->b_ops = &xfs_da3_node_buf_ops; | |
2263 | break; | |
61fe135c | 2264 | case XFS_BLFT_ATTR_LEAF_BUF: |
d75afeb3 DC |
2265 | if (magicda != XFS_ATTR_LEAF_MAGIC && |
2266 | magicda != XFS_ATTR3_LEAF_MAGIC) { | |
2267 | xfs_warn(mp, "Bad attr leaf magic!"); | |
2268 | ASSERT(0); | |
2269 | break; | |
2270 | } | |
2271 | bp->b_ops = &xfs_attr3_leaf_buf_ops; | |
2272 | break; | |
61fe135c | 2273 | case XFS_BLFT_ATTR_RMT_BUF: |
d75afeb3 DC |
2274 | if (!xfs_sb_version_hascrc(&mp->m_sb)) |
2275 | break; | |
cab09a81 | 2276 | if (magic32 != XFS_ATTR3_RMT_MAGIC) { |
d75afeb3 DC |
2277 | xfs_warn(mp, "Bad attr remote magic!"); |
2278 | ASSERT(0); | |
2279 | break; | |
2280 | } | |
2281 | bp->b_ops = &xfs_attr3_rmt_buf_ops; | |
2282 | break; | |
04a1e6c5 DC |
2283 | case XFS_BLFT_SB_BUF: |
2284 | if (magic32 != XFS_SB_MAGIC) { | |
2285 | xfs_warn(mp, "Bad SB block magic!"); | |
2286 | ASSERT(0); | |
2287 | break; | |
2288 | } | |
2289 | bp->b_ops = &xfs_sb_buf_ops; | |
2290 | break; | |
ee1a47ab | 2291 | default: |
61fe135c DC |
2292 | xfs_warn(mp, "Unknown buffer type %d!", |
2293 | xfs_blft_from_flags(buf_f)); | |
ee1a47ab CH |
2294 | break; |
2295 | } | |
1da177e4 LT |
2296 | } |
2297 | ||
d75afeb3 DC |
2298 | /* |
2299 | * Perform a 'normal' buffer recovery. Each logged region of the | |
2300 | * buffer should be copied over the corresponding region in the | |
2301 | * given buffer. The bitmap in the buf log format structure indicates | |
2302 | * where to place the logged data. | |
2303 | */ | |
2304 | STATIC void | |
2305 | xlog_recover_do_reg_buffer( | |
2306 | struct xfs_mount *mp, | |
2307 | xlog_recover_item_t *item, | |
2308 | struct xfs_buf *bp, | |
2309 | xfs_buf_log_format_t *buf_f) | |
2310 | { | |
2311 | int i; | |
2312 | int bit; | |
2313 | int nbits; | |
2314 | int error; | |
2315 | ||
2316 | trace_xfs_log_recover_buf_reg_buf(mp->m_log, buf_f); | |
2317 | ||
2318 | bit = 0; | |
2319 | i = 1; /* 0 is the buf format structure */ | |
2320 | while (1) { | |
2321 | bit = xfs_next_bit(buf_f->blf_data_map, | |
2322 | buf_f->blf_map_size, bit); | |
2323 | if (bit == -1) | |
2324 | break; | |
2325 | nbits = xfs_contig_bits(buf_f->blf_data_map, | |
2326 | buf_f->blf_map_size, bit); | |
2327 | ASSERT(nbits > 0); | |
2328 | ASSERT(item->ri_buf[i].i_addr != NULL); | |
2329 | ASSERT(item->ri_buf[i].i_len % XFS_BLF_CHUNK == 0); | |
2330 | ASSERT(BBTOB(bp->b_io_length) >= | |
2331 | ((uint)bit << XFS_BLF_SHIFT) + (nbits << XFS_BLF_SHIFT)); | |
2332 | ||
709da6a6 DC |
2333 | /* |
2334 | * The dirty regions logged in the buffer, even though | |
2335 | * contiguous, may span multiple chunks. This is because the | |
2336 | * dirty region may span a physical page boundary in a buffer | |
2337 | * and hence be split into two separate vectors for writing into | |
2338 | * the log. Hence we need to trim nbits back to the length of | |
2339 | * the current region being copied out of the log. | |
2340 | */ | |
2341 | if (item->ri_buf[i].i_len < (nbits << XFS_BLF_SHIFT)) | |
2342 | nbits = item->ri_buf[i].i_len >> XFS_BLF_SHIFT; | |
2343 | ||
d75afeb3 DC |
2344 | /* |
2345 | * Do a sanity check if this is a dquot buffer. Just checking | |
2346 | * the first dquot in the buffer should do. XXXThis is | |
2347 | * probably a good thing to do for other buf types also. | |
2348 | */ | |
2349 | error = 0; | |
2350 | if (buf_f->blf_flags & | |
2351 | (XFS_BLF_UDQUOT_BUF|XFS_BLF_PDQUOT_BUF|XFS_BLF_GDQUOT_BUF)) { | |
2352 | if (item->ri_buf[i].i_addr == NULL) { | |
2353 | xfs_alert(mp, | |
2354 | "XFS: NULL dquot in %s.", __func__); | |
2355 | goto next; | |
2356 | } | |
2357 | if (item->ri_buf[i].i_len < sizeof(xfs_disk_dquot_t)) { | |
2358 | xfs_alert(mp, | |
2359 | "XFS: dquot too small (%d) in %s.", | |
2360 | item->ri_buf[i].i_len, __func__); | |
2361 | goto next; | |
2362 | } | |
9aede1d8 | 2363 | error = xfs_dqcheck(mp, item->ri_buf[i].i_addr, |
d75afeb3 DC |
2364 | -1, 0, XFS_QMOPT_DOWARN, |
2365 | "dquot_buf_recover"); | |
2366 | if (error) | |
2367 | goto next; | |
2368 | } | |
2369 | ||
2370 | memcpy(xfs_buf_offset(bp, | |
2371 | (uint)bit << XFS_BLF_SHIFT), /* dest */ | |
2372 | item->ri_buf[i].i_addr, /* source */ | |
2373 | nbits<<XFS_BLF_SHIFT); /* length */ | |
2374 | next: | |
2375 | i++; | |
2376 | bit += nbits; | |
2377 | } | |
2378 | ||
2379 | /* Shouldn't be any more regions */ | |
2380 | ASSERT(i == item->ri_total); | |
2381 | ||
9222a9cf DC |
2382 | /* |
2383 | * We can only do post recovery validation on items on CRC enabled | |
2384 | * fielsystems as we need to know when the buffer was written to be able | |
2385 | * to determine if we should have replayed the item. If we replay old | |
2386 | * metadata over a newer buffer, then it will enter a temporarily | |
2387 | * inconsistent state resulting in verification failures. Hence for now | |
2388 | * just avoid the verification stage for non-crc filesystems | |
2389 | */ | |
2390 | if (xfs_sb_version_hascrc(&mp->m_sb)) | |
50d5c8d8 | 2391 | xlog_recover_validate_buf_type(mp, bp, buf_f); |
d75afeb3 DC |
2392 | } |
2393 | ||
1da177e4 LT |
2394 | /* |
2395 | * Perform a dquot buffer recovery. | |
8ba701ee | 2396 | * Simple algorithm: if we have found a QUOTAOFF log item of the same type |
1da177e4 LT |
2397 | * (ie. USR or GRP), then just toss this buffer away; don't recover it. |
2398 | * Else, treat it as a regular buffer and do recovery. | |
2399 | */ | |
2400 | STATIC void | |
2401 | xlog_recover_do_dquot_buffer( | |
9a8d2fdb MT |
2402 | struct xfs_mount *mp, |
2403 | struct xlog *log, | |
2404 | struct xlog_recover_item *item, | |
2405 | struct xfs_buf *bp, | |
2406 | struct xfs_buf_log_format *buf_f) | |
1da177e4 LT |
2407 | { |
2408 | uint type; | |
2409 | ||
9abbc539 DC |
2410 | trace_xfs_log_recover_buf_dquot_buf(log, buf_f); |
2411 | ||
1da177e4 LT |
2412 | /* |
2413 | * Filesystems are required to send in quota flags at mount time. | |
2414 | */ | |
2415 | if (mp->m_qflags == 0) { | |
2416 | return; | |
2417 | } | |
2418 | ||
2419 | type = 0; | |
c1155410 | 2420 | if (buf_f->blf_flags & XFS_BLF_UDQUOT_BUF) |
1da177e4 | 2421 | type |= XFS_DQ_USER; |
c1155410 | 2422 | if (buf_f->blf_flags & XFS_BLF_PDQUOT_BUF) |
c8ad20ff | 2423 | type |= XFS_DQ_PROJ; |
c1155410 | 2424 | if (buf_f->blf_flags & XFS_BLF_GDQUOT_BUF) |
1da177e4 LT |
2425 | type |= XFS_DQ_GROUP; |
2426 | /* | |
2427 | * This type of quotas was turned off, so ignore this buffer | |
2428 | */ | |
2429 | if (log->l_quotaoffs_flag & type) | |
2430 | return; | |
2431 | ||
9abbc539 | 2432 | xlog_recover_do_reg_buffer(mp, item, bp, buf_f); |
1da177e4 LT |
2433 | } |
2434 | ||
2435 | /* | |
2436 | * This routine replays a modification made to a buffer at runtime. | |
2437 | * There are actually two types of buffer, regular and inode, which | |
2438 | * are handled differently. Inode buffers are handled differently | |
2439 | * in that we only recover a specific set of data from them, namely | |
2440 | * the inode di_next_unlinked fields. This is because all other inode | |
2441 | * data is actually logged via inode records and any data we replay | |
2442 | * here which overlaps that may be stale. | |
2443 | * | |
2444 | * When meta-data buffers are freed at run time we log a buffer item | |
c1155410 | 2445 | * with the XFS_BLF_CANCEL bit set to indicate that previous copies |
1da177e4 LT |
2446 | * of the buffer in the log should not be replayed at recovery time. |
2447 | * This is so that if the blocks covered by the buffer are reused for | |
2448 | * file data before we crash we don't end up replaying old, freed | |
2449 | * meta-data into a user's file. | |
2450 | * | |
2451 | * To handle the cancellation of buffer log items, we make two passes | |
2452 | * over the log during recovery. During the first we build a table of | |
2453 | * those buffers which have been cancelled, and during the second we | |
2454 | * only replay those buffers which do not have corresponding cancel | |
34be5ff3 | 2455 | * records in the table. See xlog_recover_buffer_pass[1,2] above |
1da177e4 LT |
2456 | * for more details on the implementation of the table of cancel records. |
2457 | */ | |
2458 | STATIC int | |
c9f71f5f | 2459 | xlog_recover_buffer_pass2( |
9a8d2fdb MT |
2460 | struct xlog *log, |
2461 | struct list_head *buffer_list, | |
50d5c8d8 DC |
2462 | struct xlog_recover_item *item, |
2463 | xfs_lsn_t current_lsn) | |
1da177e4 | 2464 | { |
4e0d5f92 | 2465 | xfs_buf_log_format_t *buf_f = item->ri_buf[0].i_addr; |
e2714bf8 | 2466 | xfs_mount_t *mp = log->l_mp; |
1da177e4 LT |
2467 | xfs_buf_t *bp; |
2468 | int error; | |
6ad112bf | 2469 | uint buf_flags; |
50d5c8d8 | 2470 | xfs_lsn_t lsn; |
1da177e4 | 2471 | |
c9f71f5f CH |
2472 | /* |
2473 | * In this pass we only want to recover all the buffers which have | |
2474 | * not been cancelled and are not cancellation buffers themselves. | |
2475 | */ | |
2476 | if (xlog_check_buffer_cancelled(log, buf_f->blf_blkno, | |
2477 | buf_f->blf_len, buf_f->blf_flags)) { | |
2478 | trace_xfs_log_recover_buf_cancel(log, buf_f); | |
1da177e4 | 2479 | return 0; |
1da177e4 | 2480 | } |
c9f71f5f | 2481 | |
9abbc539 | 2482 | trace_xfs_log_recover_buf_recover(log, buf_f); |
1da177e4 | 2483 | |
a8acad70 | 2484 | buf_flags = 0; |
611c9946 DC |
2485 | if (buf_f->blf_flags & XFS_BLF_INODE_BUF) |
2486 | buf_flags |= XBF_UNMAPPED; | |
6ad112bf | 2487 | |
e2714bf8 | 2488 | bp = xfs_buf_read(mp->m_ddev_targp, buf_f->blf_blkno, buf_f->blf_len, |
c3f8fc73 | 2489 | buf_flags, NULL); |
ac4d6888 CS |
2490 | if (!bp) |
2491 | return XFS_ERROR(ENOMEM); | |
e5702805 | 2492 | error = bp->b_error; |
5a52c2a5 | 2493 | if (error) { |
901796af | 2494 | xfs_buf_ioerror_alert(bp, "xlog_recover_do..(read#1)"); |
50d5c8d8 | 2495 | goto out_release; |
1da177e4 LT |
2496 | } |
2497 | ||
50d5c8d8 DC |
2498 | /* |
2499 | * recover the buffer only if we get an LSN from it and it's less than | |
2500 | * the lsn of the transaction we are replaying. | |
2501 | */ | |
2502 | lsn = xlog_recover_get_buf_lsn(mp, bp); | |
2503 | if (lsn && lsn != -1 && XFS_LSN_CMP(lsn, current_lsn) >= 0) | |
2504 | goto out_release; | |
2505 | ||
e2714bf8 | 2506 | if (buf_f->blf_flags & XFS_BLF_INODE_BUF) { |
1da177e4 | 2507 | error = xlog_recover_do_inode_buffer(mp, item, bp, buf_f); |
e2714bf8 | 2508 | } else if (buf_f->blf_flags & |
c1155410 | 2509 | (XFS_BLF_UDQUOT_BUF|XFS_BLF_PDQUOT_BUF|XFS_BLF_GDQUOT_BUF)) { |
1da177e4 LT |
2510 | xlog_recover_do_dquot_buffer(mp, log, item, bp, buf_f); |
2511 | } else { | |
9abbc539 | 2512 | xlog_recover_do_reg_buffer(mp, item, bp, buf_f); |
1da177e4 LT |
2513 | } |
2514 | if (error) | |
50d5c8d8 | 2515 | goto out_release; |
1da177e4 LT |
2516 | |
2517 | /* | |
2518 | * Perform delayed write on the buffer. Asynchronous writes will be | |
2519 | * slower when taking into account all the buffers to be flushed. | |
2520 | * | |
2521 | * Also make sure that only inode buffers with good sizes stay in | |
2522 | * the buffer cache. The kernel moves inodes in buffers of 1 block | |
2523 | * or XFS_INODE_CLUSTER_SIZE bytes, whichever is bigger. The inode | |
2524 | * buffers in the log can be a different size if the log was generated | |
2525 | * by an older kernel using unclustered inode buffers or a newer kernel | |
2526 | * running with a different inode cluster size. Regardless, if the | |
2527 | * the inode buffer size isn't MAX(blocksize, XFS_INODE_CLUSTER_SIZE) | |
2528 | * for *our* value of XFS_INODE_CLUSTER_SIZE, then we need to keep | |
2529 | * the buffer out of the buffer cache so that the buffer won't | |
2530 | * overlap with future reads of those inodes. | |
2531 | */ | |
2532 | if (XFS_DINODE_MAGIC == | |
b53e675d | 2533 | be16_to_cpu(*((__be16 *)xfs_buf_offset(bp, 0))) && |
aa0e8833 | 2534 | (BBTOB(bp->b_io_length) != MAX(log->l_mp->m_sb.sb_blocksize, |
1da177e4 | 2535 | (__uint32_t)XFS_INODE_CLUSTER_SIZE(log->l_mp)))) { |
c867cb61 | 2536 | xfs_buf_stale(bp); |
c2b006c1 | 2537 | error = xfs_bwrite(bp); |
1da177e4 | 2538 | } else { |
ebad861b | 2539 | ASSERT(bp->b_target->bt_mount == mp); |
cb669ca5 | 2540 | bp->b_iodone = xlog_recover_iodone; |
43ff2122 | 2541 | xfs_buf_delwri_queue(bp, buffer_list); |
1da177e4 LT |
2542 | } |
2543 | ||
50d5c8d8 | 2544 | out_release: |
c2b006c1 CH |
2545 | xfs_buf_relse(bp); |
2546 | return error; | |
1da177e4 LT |
2547 | } |
2548 | ||
638f4416 DC |
2549 | /* |
2550 | * Inode fork owner changes | |
2551 | * | |
2552 | * If we have been told that we have to reparent the inode fork, it's because an | |
2553 | * extent swap operation on a CRC enabled filesystem has been done and we are | |
2554 | * replaying it. We need to walk the BMBT of the appropriate fork and change the | |
2555 | * owners of it. | |
2556 | * | |
2557 | * The complexity here is that we don't have an inode context to work with, so | |
2558 | * after we've replayed the inode we need to instantiate one. This is where the | |
2559 | * fun begins. | |
2560 | * | |
2561 | * We are in the middle of log recovery, so we can't run transactions. That | |
2562 | * means we cannot use cache coherent inode instantiation via xfs_iget(), as | |
2563 | * that will result in the corresponding iput() running the inode through | |
2564 | * xfs_inactive(). If we've just replayed an inode core that changes the link | |
2565 | * count to zero (i.e. it's been unlinked), then xfs_inactive() will run | |
2566 | * transactions (bad!). | |
2567 | * | |
2568 | * So, to avoid this, we instantiate an inode directly from the inode core we've | |
2569 | * just recovered. We have the buffer still locked, and all we really need to | |
2570 | * instantiate is the inode core and the forks being modified. We can do this | |
2571 | * manually, then run the inode btree owner change, and then tear down the | |
2572 | * xfs_inode without having to run any transactions at all. | |
2573 | * | |
2574 | * Also, because we don't have a transaction context available here but need to | |
2575 | * gather all the buffers we modify for writeback so we pass the buffer_list | |
2576 | * instead for the operation to use. | |
2577 | */ | |
2578 | ||
2579 | STATIC int | |
2580 | xfs_recover_inode_owner_change( | |
2581 | struct xfs_mount *mp, | |
2582 | struct xfs_dinode *dip, | |
2583 | struct xfs_inode_log_format *in_f, | |
2584 | struct list_head *buffer_list) | |
2585 | { | |
2586 | struct xfs_inode *ip; | |
2587 | int error; | |
2588 | ||
2589 | ASSERT(in_f->ilf_fields & (XFS_ILOG_DOWNER|XFS_ILOG_AOWNER)); | |
2590 | ||
2591 | ip = xfs_inode_alloc(mp, in_f->ilf_ino); | |
2592 | if (!ip) | |
2593 | return ENOMEM; | |
2594 | ||
2595 | /* instantiate the inode */ | |
2596 | xfs_dinode_from_disk(&ip->i_d, dip); | |
2597 | ASSERT(ip->i_d.di_version >= 3); | |
2598 | ||
2599 | error = xfs_iformat_fork(ip, dip); | |
2600 | if (error) | |
2601 | goto out_free_ip; | |
2602 | ||
2603 | ||
2604 | if (in_f->ilf_fields & XFS_ILOG_DOWNER) { | |
2605 | ASSERT(in_f->ilf_fields & XFS_ILOG_DBROOT); | |
2606 | error = xfs_bmbt_change_owner(NULL, ip, XFS_DATA_FORK, | |
2607 | ip->i_ino, buffer_list); | |
2608 | if (error) | |
2609 | goto out_free_ip; | |
2610 | } | |
2611 | ||
2612 | if (in_f->ilf_fields & XFS_ILOG_AOWNER) { | |
2613 | ASSERT(in_f->ilf_fields & XFS_ILOG_ABROOT); | |
2614 | error = xfs_bmbt_change_owner(NULL, ip, XFS_ATTR_FORK, | |
2615 | ip->i_ino, buffer_list); | |
2616 | if (error) | |
2617 | goto out_free_ip; | |
2618 | } | |
2619 | ||
2620 | out_free_ip: | |
2621 | xfs_inode_free(ip); | |
2622 | return error; | |
2623 | } | |
2624 | ||
1da177e4 | 2625 | STATIC int |
c9f71f5f | 2626 | xlog_recover_inode_pass2( |
9a8d2fdb MT |
2627 | struct xlog *log, |
2628 | struct list_head *buffer_list, | |
50d5c8d8 DC |
2629 | struct xlog_recover_item *item, |
2630 | xfs_lsn_t current_lsn) | |
1da177e4 LT |
2631 | { |
2632 | xfs_inode_log_format_t *in_f; | |
c9f71f5f | 2633 | xfs_mount_t *mp = log->l_mp; |
1da177e4 | 2634 | xfs_buf_t *bp; |
1da177e4 | 2635 | xfs_dinode_t *dip; |
1da177e4 LT |
2636 | int len; |
2637 | xfs_caddr_t src; | |
2638 | xfs_caddr_t dest; | |
2639 | int error; | |
2640 | int attr_index; | |
2641 | uint fields; | |
347d1c01 | 2642 | xfs_icdinode_t *dicp; |
93848a99 | 2643 | uint isize; |
6d192a9b | 2644 | int need_free = 0; |
1da177e4 | 2645 | |
6d192a9b | 2646 | if (item->ri_buf[0].i_len == sizeof(xfs_inode_log_format_t)) { |
4e0d5f92 | 2647 | in_f = item->ri_buf[0].i_addr; |
6d192a9b | 2648 | } else { |
4e0d5f92 | 2649 | in_f = kmem_alloc(sizeof(xfs_inode_log_format_t), KM_SLEEP); |
6d192a9b TS |
2650 | need_free = 1; |
2651 | error = xfs_inode_item_format_convert(&item->ri_buf[0], in_f); | |
2652 | if (error) | |
2653 | goto error; | |
2654 | } | |
1da177e4 LT |
2655 | |
2656 | /* | |
2657 | * Inode buffers can be freed, look out for it, | |
2658 | * and do not replay the inode. | |
2659 | */ | |
a1941895 CH |
2660 | if (xlog_check_buffer_cancelled(log, in_f->ilf_blkno, |
2661 | in_f->ilf_len, 0)) { | |
6d192a9b | 2662 | error = 0; |
9abbc539 | 2663 | trace_xfs_log_recover_inode_cancel(log, in_f); |
6d192a9b TS |
2664 | goto error; |
2665 | } | |
9abbc539 | 2666 | trace_xfs_log_recover_inode_recover(log, in_f); |
1da177e4 | 2667 | |
c3f8fc73 | 2668 | bp = xfs_buf_read(mp->m_ddev_targp, in_f->ilf_blkno, in_f->ilf_len, 0, |
93848a99 | 2669 | &xfs_inode_buf_ops); |
ac4d6888 CS |
2670 | if (!bp) { |
2671 | error = ENOMEM; | |
2672 | goto error; | |
2673 | } | |
e5702805 | 2674 | error = bp->b_error; |
5a52c2a5 | 2675 | if (error) { |
901796af | 2676 | xfs_buf_ioerror_alert(bp, "xlog_recover_do..(read#2)"); |
638f4416 | 2677 | goto out_release; |
1da177e4 | 2678 | } |
1da177e4 | 2679 | ASSERT(in_f->ilf_fields & XFS_ILOG_CORE); |
a1941895 | 2680 | dip = (xfs_dinode_t *)xfs_buf_offset(bp, in_f->ilf_boffset); |
1da177e4 LT |
2681 | |
2682 | /* | |
2683 | * Make sure the place we're flushing out to really looks | |
2684 | * like an inode! | |
2685 | */ | |
69ef921b | 2686 | if (unlikely(dip->di_magic != cpu_to_be16(XFS_DINODE_MAGIC))) { |
a0fa2b67 DC |
2687 | xfs_alert(mp, |
2688 | "%s: Bad inode magic number, dip = 0x%p, dino bp = 0x%p, ino = %Ld", | |
2689 | __func__, dip, bp, in_f->ilf_ino); | |
c9f71f5f | 2690 | XFS_ERROR_REPORT("xlog_recover_inode_pass2(1)", |
1da177e4 | 2691 | XFS_ERRLEVEL_LOW, mp); |
6d192a9b | 2692 | error = EFSCORRUPTED; |
638f4416 | 2693 | goto out_release; |
1da177e4 | 2694 | } |
4e0d5f92 | 2695 | dicp = item->ri_buf[1].i_addr; |
1da177e4 | 2696 | if (unlikely(dicp->di_magic != XFS_DINODE_MAGIC)) { |
a0fa2b67 DC |
2697 | xfs_alert(mp, |
2698 | "%s: Bad inode log record, rec ptr 0x%p, ino %Ld", | |
2699 | __func__, item, in_f->ilf_ino); | |
c9f71f5f | 2700 | XFS_ERROR_REPORT("xlog_recover_inode_pass2(2)", |
1da177e4 | 2701 | XFS_ERRLEVEL_LOW, mp); |
6d192a9b | 2702 | error = EFSCORRUPTED; |
638f4416 | 2703 | goto out_release; |
1da177e4 LT |
2704 | } |
2705 | ||
50d5c8d8 DC |
2706 | /* |
2707 | * If the inode has an LSN in it, recover the inode only if it's less | |
638f4416 DC |
2708 | * than the lsn of the transaction we are replaying. Note: we still |
2709 | * need to replay an owner change even though the inode is more recent | |
2710 | * than the transaction as there is no guarantee that all the btree | |
2711 | * blocks are more recent than this transaction, too. | |
50d5c8d8 DC |
2712 | */ |
2713 | if (dip->di_version >= 3) { | |
2714 | xfs_lsn_t lsn = be64_to_cpu(dip->di_lsn); | |
2715 | ||
2716 | if (lsn && lsn != -1 && XFS_LSN_CMP(lsn, current_lsn) >= 0) { | |
2717 | trace_xfs_log_recover_inode_skip(log, in_f); | |
2718 | error = 0; | |
638f4416 | 2719 | goto out_owner_change; |
50d5c8d8 DC |
2720 | } |
2721 | } | |
2722 | ||
e60896d8 DC |
2723 | /* |
2724 | * di_flushiter is only valid for v1/2 inodes. All changes for v3 inodes | |
2725 | * are transactional and if ordering is necessary we can determine that | |
2726 | * more accurately by the LSN field in the V3 inode core. Don't trust | |
2727 | * the inode versions we might be changing them here - use the | |
2728 | * superblock flag to determine whether we need to look at di_flushiter | |
2729 | * to skip replay when the on disk inode is newer than the log one | |
2730 | */ | |
2731 | if (!xfs_sb_version_hascrc(&mp->m_sb) && | |
2732 | dicp->di_flushiter < be16_to_cpu(dip->di_flushiter)) { | |
1da177e4 LT |
2733 | /* |
2734 | * Deal with the wrap case, DI_MAX_FLUSH is less | |
2735 | * than smaller numbers | |
2736 | */ | |
81591fe2 | 2737 | if (be16_to_cpu(dip->di_flushiter) == DI_MAX_FLUSH && |
347d1c01 | 2738 | dicp->di_flushiter < (DI_MAX_FLUSH >> 1)) { |
1da177e4 LT |
2739 | /* do nothing */ |
2740 | } else { | |
9abbc539 | 2741 | trace_xfs_log_recover_inode_skip(log, in_f); |
6d192a9b | 2742 | error = 0; |
638f4416 | 2743 | goto out_release; |
1da177e4 LT |
2744 | } |
2745 | } | |
e60896d8 | 2746 | |
1da177e4 LT |
2747 | /* Take the opportunity to reset the flush iteration count */ |
2748 | dicp->di_flushiter = 0; | |
2749 | ||
abbede1b | 2750 | if (unlikely(S_ISREG(dicp->di_mode))) { |
1da177e4 LT |
2751 | if ((dicp->di_format != XFS_DINODE_FMT_EXTENTS) && |
2752 | (dicp->di_format != XFS_DINODE_FMT_BTREE)) { | |
c9f71f5f | 2753 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(3)", |
1da177e4 | 2754 | XFS_ERRLEVEL_LOW, mp, dicp); |
a0fa2b67 DC |
2755 | xfs_alert(mp, |
2756 | "%s: Bad regular inode log record, rec ptr 0x%p, " | |
2757 | "ino ptr = 0x%p, ino bp = 0x%p, ino %Ld", | |
2758 | __func__, item, dip, bp, in_f->ilf_ino); | |
6d192a9b | 2759 | error = EFSCORRUPTED; |
638f4416 | 2760 | goto out_release; |
1da177e4 | 2761 | } |
abbede1b | 2762 | } else if (unlikely(S_ISDIR(dicp->di_mode))) { |
1da177e4 LT |
2763 | if ((dicp->di_format != XFS_DINODE_FMT_EXTENTS) && |
2764 | (dicp->di_format != XFS_DINODE_FMT_BTREE) && | |
2765 | (dicp->di_format != XFS_DINODE_FMT_LOCAL)) { | |
c9f71f5f | 2766 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(4)", |
1da177e4 | 2767 | XFS_ERRLEVEL_LOW, mp, dicp); |
a0fa2b67 DC |
2768 | xfs_alert(mp, |
2769 | "%s: Bad dir inode log record, rec ptr 0x%p, " | |
2770 | "ino ptr = 0x%p, ino bp = 0x%p, ino %Ld", | |
2771 | __func__, item, dip, bp, in_f->ilf_ino); | |
6d192a9b | 2772 | error = EFSCORRUPTED; |
638f4416 | 2773 | goto out_release; |
1da177e4 LT |
2774 | } |
2775 | } | |
2776 | if (unlikely(dicp->di_nextents + dicp->di_anextents > dicp->di_nblocks)){ | |
c9f71f5f | 2777 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(5)", |
1da177e4 | 2778 | XFS_ERRLEVEL_LOW, mp, dicp); |
a0fa2b67 DC |
2779 | xfs_alert(mp, |
2780 | "%s: Bad inode log record, rec ptr 0x%p, dino ptr 0x%p, " | |
2781 | "dino bp 0x%p, ino %Ld, total extents = %d, nblocks = %Ld", | |
2782 | __func__, item, dip, bp, in_f->ilf_ino, | |
1da177e4 LT |
2783 | dicp->di_nextents + dicp->di_anextents, |
2784 | dicp->di_nblocks); | |
6d192a9b | 2785 | error = EFSCORRUPTED; |
638f4416 | 2786 | goto out_release; |
1da177e4 LT |
2787 | } |
2788 | if (unlikely(dicp->di_forkoff > mp->m_sb.sb_inodesize)) { | |
c9f71f5f | 2789 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(6)", |
1da177e4 | 2790 | XFS_ERRLEVEL_LOW, mp, dicp); |
a0fa2b67 DC |
2791 | xfs_alert(mp, |
2792 | "%s: Bad inode log record, rec ptr 0x%p, dino ptr 0x%p, " | |
2793 | "dino bp 0x%p, ino %Ld, forkoff 0x%x", __func__, | |
c9f71f5f | 2794 | item, dip, bp, in_f->ilf_ino, dicp->di_forkoff); |
6d192a9b | 2795 | error = EFSCORRUPTED; |
638f4416 | 2796 | goto out_release; |
1da177e4 | 2797 | } |
93848a99 CH |
2798 | isize = xfs_icdinode_size(dicp->di_version); |
2799 | if (unlikely(item->ri_buf[1].i_len > isize)) { | |
c9f71f5f | 2800 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(7)", |
1da177e4 | 2801 | XFS_ERRLEVEL_LOW, mp, dicp); |
a0fa2b67 DC |
2802 | xfs_alert(mp, |
2803 | "%s: Bad inode log record length %d, rec ptr 0x%p", | |
2804 | __func__, item->ri_buf[1].i_len, item); | |
6d192a9b | 2805 | error = EFSCORRUPTED; |
638f4416 | 2806 | goto out_release; |
1da177e4 LT |
2807 | } |
2808 | ||
2809 | /* The core is in in-core format */ | |
93848a99 | 2810 | xfs_dinode_to_disk(dip, dicp); |
1da177e4 LT |
2811 | |
2812 | /* the rest is in on-disk format */ | |
93848a99 CH |
2813 | if (item->ri_buf[1].i_len > isize) { |
2814 | memcpy((char *)dip + isize, | |
2815 | item->ri_buf[1].i_addr + isize, | |
2816 | item->ri_buf[1].i_len - isize); | |
1da177e4 LT |
2817 | } |
2818 | ||
2819 | fields = in_f->ilf_fields; | |
2820 | switch (fields & (XFS_ILOG_DEV | XFS_ILOG_UUID)) { | |
2821 | case XFS_ILOG_DEV: | |
81591fe2 | 2822 | xfs_dinode_put_rdev(dip, in_f->ilf_u.ilfu_rdev); |
1da177e4 LT |
2823 | break; |
2824 | case XFS_ILOG_UUID: | |
81591fe2 CH |
2825 | memcpy(XFS_DFORK_DPTR(dip), |
2826 | &in_f->ilf_u.ilfu_uuid, | |
2827 | sizeof(uuid_t)); | |
1da177e4 LT |
2828 | break; |
2829 | } | |
2830 | ||
2831 | if (in_f->ilf_size == 2) | |
638f4416 | 2832 | goto out_owner_change; |
1da177e4 LT |
2833 | len = item->ri_buf[2].i_len; |
2834 | src = item->ri_buf[2].i_addr; | |
2835 | ASSERT(in_f->ilf_size <= 4); | |
2836 | ASSERT((in_f->ilf_size == 3) || (fields & XFS_ILOG_AFORK)); | |
2837 | ASSERT(!(fields & XFS_ILOG_DFORK) || | |
2838 | (len == in_f->ilf_dsize)); | |
2839 | ||
2840 | switch (fields & XFS_ILOG_DFORK) { | |
2841 | case XFS_ILOG_DDATA: | |
2842 | case XFS_ILOG_DEXT: | |
81591fe2 | 2843 | memcpy(XFS_DFORK_DPTR(dip), src, len); |
1da177e4 LT |
2844 | break; |
2845 | ||
2846 | case XFS_ILOG_DBROOT: | |
7cc95a82 | 2847 | xfs_bmbt_to_bmdr(mp, (struct xfs_btree_block *)src, len, |
81591fe2 | 2848 | (xfs_bmdr_block_t *)XFS_DFORK_DPTR(dip), |
1da177e4 LT |
2849 | XFS_DFORK_DSIZE(dip, mp)); |
2850 | break; | |
2851 | ||
2852 | default: | |
2853 | /* | |
2854 | * There are no data fork flags set. | |
2855 | */ | |
2856 | ASSERT((fields & XFS_ILOG_DFORK) == 0); | |
2857 | break; | |
2858 | } | |
2859 | ||
2860 | /* | |
2861 | * If we logged any attribute data, recover it. There may or | |
2862 | * may not have been any other non-core data logged in this | |
2863 | * transaction. | |
2864 | */ | |
2865 | if (in_f->ilf_fields & XFS_ILOG_AFORK) { | |
2866 | if (in_f->ilf_fields & XFS_ILOG_DFORK) { | |
2867 | attr_index = 3; | |
2868 | } else { | |
2869 | attr_index = 2; | |
2870 | } | |
2871 | len = item->ri_buf[attr_index].i_len; | |
2872 | src = item->ri_buf[attr_index].i_addr; | |
2873 | ASSERT(len == in_f->ilf_asize); | |
2874 | ||
2875 | switch (in_f->ilf_fields & XFS_ILOG_AFORK) { | |
2876 | case XFS_ILOG_ADATA: | |
2877 | case XFS_ILOG_AEXT: | |
2878 | dest = XFS_DFORK_APTR(dip); | |
2879 | ASSERT(len <= XFS_DFORK_ASIZE(dip, mp)); | |
2880 | memcpy(dest, src, len); | |
2881 | break; | |
2882 | ||
2883 | case XFS_ILOG_ABROOT: | |
2884 | dest = XFS_DFORK_APTR(dip); | |
7cc95a82 CH |
2885 | xfs_bmbt_to_bmdr(mp, (struct xfs_btree_block *)src, |
2886 | len, (xfs_bmdr_block_t*)dest, | |
1da177e4 LT |
2887 | XFS_DFORK_ASIZE(dip, mp)); |
2888 | break; | |
2889 | ||
2890 | default: | |
a0fa2b67 | 2891 | xfs_warn(log->l_mp, "%s: Invalid flag", __func__); |
1da177e4 | 2892 | ASSERT(0); |
6d192a9b | 2893 | error = EIO; |
638f4416 | 2894 | goto out_release; |
1da177e4 LT |
2895 | } |
2896 | } | |
2897 | ||
638f4416 DC |
2898 | out_owner_change: |
2899 | if (in_f->ilf_fields & (XFS_ILOG_DOWNER|XFS_ILOG_AOWNER)) | |
2900 | error = xfs_recover_inode_owner_change(mp, dip, in_f, | |
2901 | buffer_list); | |
93848a99 CH |
2902 | /* re-generate the checksum. */ |
2903 | xfs_dinode_calc_crc(log->l_mp, dip); | |
2904 | ||
ebad861b | 2905 | ASSERT(bp->b_target->bt_mount == mp); |
cb669ca5 | 2906 | bp->b_iodone = xlog_recover_iodone; |
43ff2122 | 2907 | xfs_buf_delwri_queue(bp, buffer_list); |
50d5c8d8 DC |
2908 | |
2909 | out_release: | |
61551f1e | 2910 | xfs_buf_relse(bp); |
6d192a9b TS |
2911 | error: |
2912 | if (need_free) | |
f0e2d93c | 2913 | kmem_free(in_f); |
6d192a9b | 2914 | return XFS_ERROR(error); |
1da177e4 LT |
2915 | } |
2916 | ||
2917 | /* | |
9a8d2fdb | 2918 | * Recover QUOTAOFF records. We simply make a note of it in the xlog |
1da177e4 LT |
2919 | * structure, so that we know not to do any dquot item or dquot buffer recovery, |
2920 | * of that type. | |
2921 | */ | |
2922 | STATIC int | |
c9f71f5f | 2923 | xlog_recover_quotaoff_pass1( |
9a8d2fdb MT |
2924 | struct xlog *log, |
2925 | struct xlog_recover_item *item) | |
1da177e4 | 2926 | { |
c9f71f5f | 2927 | xfs_qoff_logformat_t *qoff_f = item->ri_buf[0].i_addr; |
1da177e4 LT |
2928 | ASSERT(qoff_f); |
2929 | ||
2930 | /* | |
2931 | * The logitem format's flag tells us if this was user quotaoff, | |
77a7cce4 | 2932 | * group/project quotaoff or both. |
1da177e4 LT |
2933 | */ |
2934 | if (qoff_f->qf_flags & XFS_UQUOTA_ACCT) | |
2935 | log->l_quotaoffs_flag |= XFS_DQ_USER; | |
77a7cce4 NS |
2936 | if (qoff_f->qf_flags & XFS_PQUOTA_ACCT) |
2937 | log->l_quotaoffs_flag |= XFS_DQ_PROJ; | |
1da177e4 LT |
2938 | if (qoff_f->qf_flags & XFS_GQUOTA_ACCT) |
2939 | log->l_quotaoffs_flag |= XFS_DQ_GROUP; | |
2940 | ||
2941 | return (0); | |
2942 | } | |
2943 | ||
2944 | /* | |
2945 | * Recover a dquot record | |
2946 | */ | |
2947 | STATIC int | |
c9f71f5f | 2948 | xlog_recover_dquot_pass2( |
9a8d2fdb MT |
2949 | struct xlog *log, |
2950 | struct list_head *buffer_list, | |
50d5c8d8 DC |
2951 | struct xlog_recover_item *item, |
2952 | xfs_lsn_t current_lsn) | |
1da177e4 | 2953 | { |
c9f71f5f | 2954 | xfs_mount_t *mp = log->l_mp; |
1da177e4 LT |
2955 | xfs_buf_t *bp; |
2956 | struct xfs_disk_dquot *ddq, *recddq; | |
2957 | int error; | |
2958 | xfs_dq_logformat_t *dq_f; | |
2959 | uint type; | |
2960 | ||
1da177e4 LT |
2961 | |
2962 | /* | |
2963 | * Filesystems are required to send in quota flags at mount time. | |
2964 | */ | |
2965 | if (mp->m_qflags == 0) | |
2966 | return (0); | |
2967 | ||
4e0d5f92 CH |
2968 | recddq = item->ri_buf[1].i_addr; |
2969 | if (recddq == NULL) { | |
a0fa2b67 | 2970 | xfs_alert(log->l_mp, "NULL dquot in %s.", __func__); |
0c5e1ce8 CH |
2971 | return XFS_ERROR(EIO); |
2972 | } | |
8ec6dba2 | 2973 | if (item->ri_buf[1].i_len < sizeof(xfs_disk_dquot_t)) { |
a0fa2b67 | 2974 | xfs_alert(log->l_mp, "dquot too small (%d) in %s.", |
0c5e1ce8 CH |
2975 | item->ri_buf[1].i_len, __func__); |
2976 | return XFS_ERROR(EIO); | |
2977 | } | |
2978 | ||
1da177e4 LT |
2979 | /* |
2980 | * This type of quotas was turned off, so ignore this record. | |
2981 | */ | |
b53e675d | 2982 | type = recddq->d_flags & (XFS_DQ_USER | XFS_DQ_PROJ | XFS_DQ_GROUP); |
1da177e4 LT |
2983 | ASSERT(type); |
2984 | if (log->l_quotaoffs_flag & type) | |
2985 | return (0); | |
2986 | ||
2987 | /* | |
2988 | * At this point we know that quota was _not_ turned off. | |
2989 | * Since the mount flags are not indicating to us otherwise, this | |
2990 | * must mean that quota is on, and the dquot needs to be replayed. | |
2991 | * Remember that we may not have fully recovered the superblock yet, | |
2992 | * so we can't do the usual trick of looking at the SB quota bits. | |
2993 | * | |
2994 | * The other possibility, of course, is that the quota subsystem was | |
2995 | * removed since the last mount - ENOSYS. | |
2996 | */ | |
4e0d5f92 | 2997 | dq_f = item->ri_buf[0].i_addr; |
1da177e4 | 2998 | ASSERT(dq_f); |
9aede1d8 | 2999 | error = xfs_dqcheck(mp, recddq, dq_f->qlf_id, 0, XFS_QMOPT_DOWARN, |
a0fa2b67 DC |
3000 | "xlog_recover_dquot_pass2 (log copy)"); |
3001 | if (error) | |
1da177e4 | 3002 | return XFS_ERROR(EIO); |
1da177e4 LT |
3003 | ASSERT(dq_f->qlf_len == 1); |
3004 | ||
7ca790a5 | 3005 | error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, dq_f->qlf_blkno, |
c3f8fc73 DC |
3006 | XFS_FSB_TO_BB(mp, dq_f->qlf_len), 0, &bp, |
3007 | NULL); | |
7ca790a5 | 3008 | if (error) |
1da177e4 | 3009 | return error; |
7ca790a5 | 3010 | |
1da177e4 LT |
3011 | ASSERT(bp); |
3012 | ddq = (xfs_disk_dquot_t *)xfs_buf_offset(bp, dq_f->qlf_boffset); | |
3013 | ||
3014 | /* | |
3015 | * At least the magic num portion should be on disk because this | |
3016 | * was among a chunk of dquots created earlier, and we did some | |
3017 | * minimal initialization then. | |
3018 | */ | |
9aede1d8 | 3019 | error = xfs_dqcheck(mp, ddq, dq_f->qlf_id, 0, XFS_QMOPT_DOWARN, |
a0fa2b67 DC |
3020 | "xlog_recover_dquot_pass2"); |
3021 | if (error) { | |
1da177e4 LT |
3022 | xfs_buf_relse(bp); |
3023 | return XFS_ERROR(EIO); | |
3024 | } | |
3025 | ||
50d5c8d8 DC |
3026 | /* |
3027 | * If the dquot has an LSN in it, recover the dquot only if it's less | |
3028 | * than the lsn of the transaction we are replaying. | |
3029 | */ | |
3030 | if (xfs_sb_version_hascrc(&mp->m_sb)) { | |
3031 | struct xfs_dqblk *dqb = (struct xfs_dqblk *)ddq; | |
3032 | xfs_lsn_t lsn = be64_to_cpu(dqb->dd_lsn); | |
3033 | ||
3034 | if (lsn && lsn != -1 && XFS_LSN_CMP(lsn, current_lsn) >= 0) { | |
3035 | goto out_release; | |
3036 | } | |
3037 | } | |
3038 | ||
1da177e4 | 3039 | memcpy(ddq, recddq, item->ri_buf[1].i_len); |
6fcdc59d DC |
3040 | if (xfs_sb_version_hascrc(&mp->m_sb)) { |
3041 | xfs_update_cksum((char *)ddq, sizeof(struct xfs_dqblk), | |
3042 | XFS_DQUOT_CRC_OFF); | |
3043 | } | |
1da177e4 LT |
3044 | |
3045 | ASSERT(dq_f->qlf_size == 2); | |
ebad861b | 3046 | ASSERT(bp->b_target->bt_mount == mp); |
cb669ca5 | 3047 | bp->b_iodone = xlog_recover_iodone; |
43ff2122 | 3048 | xfs_buf_delwri_queue(bp, buffer_list); |
1da177e4 | 3049 | |
50d5c8d8 DC |
3050 | out_release: |
3051 | xfs_buf_relse(bp); | |
3052 | return 0; | |
1da177e4 LT |
3053 | } |
3054 | ||
3055 | /* | |
3056 | * This routine is called to create an in-core extent free intent | |
3057 | * item from the efi format structure which was logged on disk. | |
3058 | * It allocates an in-core efi, copies the extents from the format | |
3059 | * structure into it, and adds the efi to the AIL with the given | |
3060 | * LSN. | |
3061 | */ | |
6d192a9b | 3062 | STATIC int |
c9f71f5f | 3063 | xlog_recover_efi_pass2( |
9a8d2fdb MT |
3064 | struct xlog *log, |
3065 | struct xlog_recover_item *item, | |
3066 | xfs_lsn_t lsn) | |
1da177e4 | 3067 | { |
6d192a9b | 3068 | int error; |
c9f71f5f | 3069 | xfs_mount_t *mp = log->l_mp; |
1da177e4 LT |
3070 | xfs_efi_log_item_t *efip; |
3071 | xfs_efi_log_format_t *efi_formatp; | |
1da177e4 | 3072 | |
4e0d5f92 | 3073 | efi_formatp = item->ri_buf[0].i_addr; |
1da177e4 | 3074 | |
1da177e4 | 3075 | efip = xfs_efi_init(mp, efi_formatp->efi_nextents); |
6d192a9b TS |
3076 | if ((error = xfs_efi_copy_format(&(item->ri_buf[0]), |
3077 | &(efip->efi_format)))) { | |
3078 | xfs_efi_item_free(efip); | |
3079 | return error; | |
3080 | } | |
b199c8a4 | 3081 | atomic_set(&efip->efi_next_extent, efi_formatp->efi_nextents); |
1da177e4 | 3082 | |
a9c21c1b | 3083 | spin_lock(&log->l_ailp->xa_lock); |
1da177e4 | 3084 | /* |
783a2f65 | 3085 | * xfs_trans_ail_update() drops the AIL lock. |
1da177e4 | 3086 | */ |
e6059949 | 3087 | xfs_trans_ail_update(log->l_ailp, &efip->efi_item, lsn); |
6d192a9b | 3088 | return 0; |
1da177e4 LT |
3089 | } |
3090 | ||
3091 | ||
3092 | /* | |
3093 | * This routine is called when an efd format structure is found in | |
3094 | * a committed transaction in the log. It's purpose is to cancel | |
3095 | * the corresponding efi if it was still in the log. To do this | |
3096 | * it searches the AIL for the efi with an id equal to that in the | |
3097 | * efd format structure. If we find it, we remove the efi from the | |
3098 | * AIL and free it. | |
3099 | */ | |
c9f71f5f CH |
3100 | STATIC int |
3101 | xlog_recover_efd_pass2( | |
9a8d2fdb MT |
3102 | struct xlog *log, |
3103 | struct xlog_recover_item *item) | |
1da177e4 | 3104 | { |
1da177e4 LT |
3105 | xfs_efd_log_format_t *efd_formatp; |
3106 | xfs_efi_log_item_t *efip = NULL; | |
3107 | xfs_log_item_t *lip; | |
1da177e4 | 3108 | __uint64_t efi_id; |
27d8d5fe | 3109 | struct xfs_ail_cursor cur; |
783a2f65 | 3110 | struct xfs_ail *ailp = log->l_ailp; |
1da177e4 | 3111 | |
4e0d5f92 | 3112 | efd_formatp = item->ri_buf[0].i_addr; |
6d192a9b TS |
3113 | ASSERT((item->ri_buf[0].i_len == (sizeof(xfs_efd_log_format_32_t) + |
3114 | ((efd_formatp->efd_nextents - 1) * sizeof(xfs_extent_32_t)))) || | |
3115 | (item->ri_buf[0].i_len == (sizeof(xfs_efd_log_format_64_t) + | |
3116 | ((efd_formatp->efd_nextents - 1) * sizeof(xfs_extent_64_t))))); | |
1da177e4 LT |
3117 | efi_id = efd_formatp->efd_efi_id; |
3118 | ||
3119 | /* | |
3120 | * Search for the efi with the id in the efd format structure | |
3121 | * in the AIL. | |
3122 | */ | |
a9c21c1b DC |
3123 | spin_lock(&ailp->xa_lock); |
3124 | lip = xfs_trans_ail_cursor_first(ailp, &cur, 0); | |
1da177e4 LT |
3125 | while (lip != NULL) { |
3126 | if (lip->li_type == XFS_LI_EFI) { | |
3127 | efip = (xfs_efi_log_item_t *)lip; | |
3128 | if (efip->efi_format.efi_id == efi_id) { | |
3129 | /* | |
783a2f65 | 3130 | * xfs_trans_ail_delete() drops the |
1da177e4 LT |
3131 | * AIL lock. |
3132 | */ | |
04913fdd DC |
3133 | xfs_trans_ail_delete(ailp, lip, |
3134 | SHUTDOWN_CORRUPT_INCORE); | |
8ae2c0f6 | 3135 | xfs_efi_item_free(efip); |
a9c21c1b | 3136 | spin_lock(&ailp->xa_lock); |
27d8d5fe | 3137 | break; |
1da177e4 LT |
3138 | } |
3139 | } | |
a9c21c1b | 3140 | lip = xfs_trans_ail_cursor_next(ailp, &cur); |
1da177e4 | 3141 | } |
a9c21c1b DC |
3142 | xfs_trans_ail_cursor_done(ailp, &cur); |
3143 | spin_unlock(&ailp->xa_lock); | |
c9f71f5f CH |
3144 | |
3145 | return 0; | |
1da177e4 LT |
3146 | } |
3147 | ||
28c8e41a DC |
3148 | /* |
3149 | * This routine is called when an inode create format structure is found in a | |
3150 | * committed transaction in the log. It's purpose is to initialise the inodes | |
3151 | * being allocated on disk. This requires us to get inode cluster buffers that | |
3152 | * match the range to be intialised, stamped with inode templates and written | |
3153 | * by delayed write so that subsequent modifications will hit the cached buffer | |
3154 | * and only need writing out at the end of recovery. | |
3155 | */ | |
3156 | STATIC int | |
3157 | xlog_recover_do_icreate_pass2( | |
3158 | struct xlog *log, | |
3159 | struct list_head *buffer_list, | |
3160 | xlog_recover_item_t *item) | |
3161 | { | |
3162 | struct xfs_mount *mp = log->l_mp; | |
3163 | struct xfs_icreate_log *icl; | |
3164 | xfs_agnumber_t agno; | |
3165 | xfs_agblock_t agbno; | |
3166 | unsigned int count; | |
3167 | unsigned int isize; | |
3168 | xfs_agblock_t length; | |
3169 | ||
3170 | icl = (struct xfs_icreate_log *)item->ri_buf[0].i_addr; | |
3171 | if (icl->icl_type != XFS_LI_ICREATE) { | |
3172 | xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad type"); | |
3173 | return EINVAL; | |
3174 | } | |
3175 | ||
3176 | if (icl->icl_size != 1) { | |
3177 | xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad icl size"); | |
3178 | return EINVAL; | |
3179 | } | |
3180 | ||
3181 | agno = be32_to_cpu(icl->icl_ag); | |
3182 | if (agno >= mp->m_sb.sb_agcount) { | |
3183 | xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad agno"); | |
3184 | return EINVAL; | |
3185 | } | |
3186 | agbno = be32_to_cpu(icl->icl_agbno); | |
3187 | if (!agbno || agbno == NULLAGBLOCK || agbno >= mp->m_sb.sb_agblocks) { | |
3188 | xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad agbno"); | |
3189 | return EINVAL; | |
3190 | } | |
3191 | isize = be32_to_cpu(icl->icl_isize); | |
3192 | if (isize != mp->m_sb.sb_inodesize) { | |
3193 | xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad isize"); | |
3194 | return EINVAL; | |
3195 | } | |
3196 | count = be32_to_cpu(icl->icl_count); | |
3197 | if (!count) { | |
3198 | xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad count"); | |
3199 | return EINVAL; | |
3200 | } | |
3201 | length = be32_to_cpu(icl->icl_length); | |
3202 | if (!length || length >= mp->m_sb.sb_agblocks) { | |
3203 | xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad length"); | |
3204 | return EINVAL; | |
3205 | } | |
3206 | ||
3207 | /* existing allocation is fixed value */ | |
3208 | ASSERT(count == XFS_IALLOC_INODES(mp)); | |
3209 | ASSERT(length == XFS_IALLOC_BLOCKS(mp)); | |
3210 | if (count != XFS_IALLOC_INODES(mp) || | |
3211 | length != XFS_IALLOC_BLOCKS(mp)) { | |
3212 | xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad count 2"); | |
3213 | return EINVAL; | |
3214 | } | |
3215 | ||
3216 | /* | |
3217 | * Inode buffers can be freed. Do not replay the inode initialisation as | |
3218 | * we could be overwriting something written after this inode buffer was | |
3219 | * cancelled. | |
3220 | * | |
3221 | * XXX: we need to iterate all buffers and only init those that are not | |
3222 | * cancelled. I think that a more fine grained factoring of | |
3223 | * xfs_ialloc_inode_init may be appropriate here to enable this to be | |
3224 | * done easily. | |
3225 | */ | |
3226 | if (xlog_check_buffer_cancelled(log, | |
3227 | XFS_AGB_TO_DADDR(mp, agno, agbno), length, 0)) | |
3228 | return 0; | |
3229 | ||
3230 | xfs_ialloc_inode_init(mp, NULL, buffer_list, agno, agbno, length, | |
3231 | be32_to_cpu(icl->icl_gen)); | |
3232 | return 0; | |
3233 | } | |
3234 | ||
1da177e4 LT |
3235 | /* |
3236 | * Free up any resources allocated by the transaction | |
3237 | * | |
3238 | * Remember that EFIs, EFDs, and IUNLINKs are handled later. | |
3239 | */ | |
3240 | STATIC void | |
3241 | xlog_recover_free_trans( | |
d0450948 | 3242 | struct xlog_recover *trans) |
1da177e4 | 3243 | { |
f0a76953 | 3244 | xlog_recover_item_t *item, *n; |
1da177e4 LT |
3245 | int i; |
3246 | ||
f0a76953 DC |
3247 | list_for_each_entry_safe(item, n, &trans->r_itemq, ri_list) { |
3248 | /* Free the regions in the item. */ | |
3249 | list_del(&item->ri_list); | |
3250 | for (i = 0; i < item->ri_cnt; i++) | |
3251 | kmem_free(item->ri_buf[i].i_addr); | |
1da177e4 | 3252 | /* Free the item itself */ |
f0a76953 DC |
3253 | kmem_free(item->ri_buf); |
3254 | kmem_free(item); | |
3255 | } | |
1da177e4 | 3256 | /* Free the transaction recover structure */ |
f0e2d93c | 3257 | kmem_free(trans); |
1da177e4 LT |
3258 | } |
3259 | ||
00574da1 ZYW |
3260 | STATIC void |
3261 | xlog_recover_buffer_ra_pass2( | |
3262 | struct xlog *log, | |
3263 | struct xlog_recover_item *item) | |
3264 | { | |
3265 | struct xfs_buf_log_format *buf_f = item->ri_buf[0].i_addr; | |
3266 | struct xfs_mount *mp = log->l_mp; | |
3267 | ||
84a5b730 | 3268 | if (xlog_peek_buffer_cancelled(log, buf_f->blf_blkno, |
00574da1 ZYW |
3269 | buf_f->blf_len, buf_f->blf_flags)) { |
3270 | return; | |
3271 | } | |
3272 | ||
3273 | xfs_buf_readahead(mp->m_ddev_targp, buf_f->blf_blkno, | |
3274 | buf_f->blf_len, NULL); | |
3275 | } | |
3276 | ||
3277 | STATIC void | |
3278 | xlog_recover_inode_ra_pass2( | |
3279 | struct xlog *log, | |
3280 | struct xlog_recover_item *item) | |
3281 | { | |
3282 | struct xfs_inode_log_format ilf_buf; | |
3283 | struct xfs_inode_log_format *ilfp; | |
3284 | struct xfs_mount *mp = log->l_mp; | |
3285 | int error; | |
3286 | ||
3287 | if (item->ri_buf[0].i_len == sizeof(struct xfs_inode_log_format)) { | |
3288 | ilfp = item->ri_buf[0].i_addr; | |
3289 | } else { | |
3290 | ilfp = &ilf_buf; | |
3291 | memset(ilfp, 0, sizeof(*ilfp)); | |
3292 | error = xfs_inode_item_format_convert(&item->ri_buf[0], ilfp); | |
3293 | if (error) | |
3294 | return; | |
3295 | } | |
3296 | ||
84a5b730 | 3297 | if (xlog_peek_buffer_cancelled(log, ilfp->ilf_blkno, ilfp->ilf_len, 0)) |
00574da1 ZYW |
3298 | return; |
3299 | ||
3300 | xfs_buf_readahead(mp->m_ddev_targp, ilfp->ilf_blkno, | |
d8914002 | 3301 | ilfp->ilf_len, &xfs_inode_buf_ra_ops); |
00574da1 ZYW |
3302 | } |
3303 | ||
3304 | STATIC void | |
3305 | xlog_recover_dquot_ra_pass2( | |
3306 | struct xlog *log, | |
3307 | struct xlog_recover_item *item) | |
3308 | { | |
3309 | struct xfs_mount *mp = log->l_mp; | |
3310 | struct xfs_disk_dquot *recddq; | |
3311 | struct xfs_dq_logformat *dq_f; | |
3312 | uint type; | |
3313 | ||
3314 | ||
3315 | if (mp->m_qflags == 0) | |
3316 | return; | |
3317 | ||
3318 | recddq = item->ri_buf[1].i_addr; | |
3319 | if (recddq == NULL) | |
3320 | return; | |
3321 | if (item->ri_buf[1].i_len < sizeof(struct xfs_disk_dquot)) | |
3322 | return; | |
3323 | ||
3324 | type = recddq->d_flags & (XFS_DQ_USER | XFS_DQ_PROJ | XFS_DQ_GROUP); | |
3325 | ASSERT(type); | |
3326 | if (log->l_quotaoffs_flag & type) | |
3327 | return; | |
3328 | ||
3329 | dq_f = item->ri_buf[0].i_addr; | |
3330 | ASSERT(dq_f); | |
3331 | ASSERT(dq_f->qlf_len == 1); | |
3332 | ||
3333 | xfs_buf_readahead(mp->m_ddev_targp, dq_f->qlf_blkno, | |
0f0d3345 | 3334 | XFS_FSB_TO_BB(mp, dq_f->qlf_len), NULL); |
00574da1 ZYW |
3335 | } |
3336 | ||
3337 | STATIC void | |
3338 | xlog_recover_ra_pass2( | |
3339 | struct xlog *log, | |
3340 | struct xlog_recover_item *item) | |
3341 | { | |
3342 | switch (ITEM_TYPE(item)) { | |
3343 | case XFS_LI_BUF: | |
3344 | xlog_recover_buffer_ra_pass2(log, item); | |
3345 | break; | |
3346 | case XFS_LI_INODE: | |
3347 | xlog_recover_inode_ra_pass2(log, item); | |
3348 | break; | |
3349 | case XFS_LI_DQUOT: | |
3350 | xlog_recover_dquot_ra_pass2(log, item); | |
3351 | break; | |
3352 | case XFS_LI_EFI: | |
3353 | case XFS_LI_EFD: | |
3354 | case XFS_LI_QUOTAOFF: | |
3355 | default: | |
3356 | break; | |
3357 | } | |
3358 | } | |
3359 | ||
d0450948 | 3360 | STATIC int |
c9f71f5f | 3361 | xlog_recover_commit_pass1( |
ad223e60 MT |
3362 | struct xlog *log, |
3363 | struct xlog_recover *trans, | |
3364 | struct xlog_recover_item *item) | |
d0450948 | 3365 | { |
c9f71f5f | 3366 | trace_xfs_log_recover_item_recover(log, trans, item, XLOG_RECOVER_PASS1); |
d0450948 CH |
3367 | |
3368 | switch (ITEM_TYPE(item)) { | |
3369 | case XFS_LI_BUF: | |
c9f71f5f CH |
3370 | return xlog_recover_buffer_pass1(log, item); |
3371 | case XFS_LI_QUOTAOFF: | |
3372 | return xlog_recover_quotaoff_pass1(log, item); | |
d0450948 | 3373 | case XFS_LI_INODE: |
d0450948 | 3374 | case XFS_LI_EFI: |
d0450948 | 3375 | case XFS_LI_EFD: |
c9f71f5f | 3376 | case XFS_LI_DQUOT: |
28c8e41a | 3377 | case XFS_LI_ICREATE: |
c9f71f5f | 3378 | /* nothing to do in pass 1 */ |
d0450948 | 3379 | return 0; |
c9f71f5f | 3380 | default: |
a0fa2b67 DC |
3381 | xfs_warn(log->l_mp, "%s: invalid item type (%d)", |
3382 | __func__, ITEM_TYPE(item)); | |
c9f71f5f CH |
3383 | ASSERT(0); |
3384 | return XFS_ERROR(EIO); | |
3385 | } | |
3386 | } | |
3387 | ||
3388 | STATIC int | |
3389 | xlog_recover_commit_pass2( | |
ad223e60 MT |
3390 | struct xlog *log, |
3391 | struct xlog_recover *trans, | |
3392 | struct list_head *buffer_list, | |
3393 | struct xlog_recover_item *item) | |
c9f71f5f CH |
3394 | { |
3395 | trace_xfs_log_recover_item_recover(log, trans, item, XLOG_RECOVER_PASS2); | |
3396 | ||
3397 | switch (ITEM_TYPE(item)) { | |
3398 | case XFS_LI_BUF: | |
50d5c8d8 DC |
3399 | return xlog_recover_buffer_pass2(log, buffer_list, item, |
3400 | trans->r_lsn); | |
c9f71f5f | 3401 | case XFS_LI_INODE: |
50d5c8d8 DC |
3402 | return xlog_recover_inode_pass2(log, buffer_list, item, |
3403 | trans->r_lsn); | |
c9f71f5f CH |
3404 | case XFS_LI_EFI: |
3405 | return xlog_recover_efi_pass2(log, item, trans->r_lsn); | |
3406 | case XFS_LI_EFD: | |
3407 | return xlog_recover_efd_pass2(log, item); | |
d0450948 | 3408 | case XFS_LI_DQUOT: |
50d5c8d8 DC |
3409 | return xlog_recover_dquot_pass2(log, buffer_list, item, |
3410 | trans->r_lsn); | |
28c8e41a DC |
3411 | case XFS_LI_ICREATE: |
3412 | return xlog_recover_do_icreate_pass2(log, buffer_list, item); | |
d0450948 | 3413 | case XFS_LI_QUOTAOFF: |
c9f71f5f CH |
3414 | /* nothing to do in pass2 */ |
3415 | return 0; | |
d0450948 | 3416 | default: |
a0fa2b67 DC |
3417 | xfs_warn(log->l_mp, "%s: invalid item type (%d)", |
3418 | __func__, ITEM_TYPE(item)); | |
d0450948 CH |
3419 | ASSERT(0); |
3420 | return XFS_ERROR(EIO); | |
3421 | } | |
3422 | } | |
3423 | ||
00574da1 ZYW |
3424 | STATIC int |
3425 | xlog_recover_items_pass2( | |
3426 | struct xlog *log, | |
3427 | struct xlog_recover *trans, | |
3428 | struct list_head *buffer_list, | |
3429 | struct list_head *item_list) | |
3430 | { | |
3431 | struct xlog_recover_item *item; | |
3432 | int error = 0; | |
3433 | ||
3434 | list_for_each_entry(item, item_list, ri_list) { | |
3435 | error = xlog_recover_commit_pass2(log, trans, | |
3436 | buffer_list, item); | |
3437 | if (error) | |
3438 | return error; | |
3439 | } | |
3440 | ||
3441 | return error; | |
3442 | } | |
3443 | ||
d0450948 CH |
3444 | /* |
3445 | * Perform the transaction. | |
3446 | * | |
3447 | * If the transaction modifies a buffer or inode, do it now. Otherwise, | |
3448 | * EFIs and EFDs get queued up by adding entries into the AIL for them. | |
3449 | */ | |
1da177e4 LT |
3450 | STATIC int |
3451 | xlog_recover_commit_trans( | |
ad223e60 | 3452 | struct xlog *log, |
d0450948 | 3453 | struct xlog_recover *trans, |
1da177e4 LT |
3454 | int pass) |
3455 | { | |
00574da1 ZYW |
3456 | int error = 0; |
3457 | int error2; | |
3458 | int items_queued = 0; | |
3459 | struct xlog_recover_item *item; | |
3460 | struct xlog_recover_item *next; | |
3461 | LIST_HEAD (buffer_list); | |
3462 | LIST_HEAD (ra_list); | |
3463 | LIST_HEAD (done_list); | |
3464 | ||
3465 | #define XLOG_RECOVER_COMMIT_QUEUE_MAX 100 | |
1da177e4 | 3466 | |
f0a76953 | 3467 | hlist_del(&trans->r_list); |
d0450948 CH |
3468 | |
3469 | error = xlog_recover_reorder_trans(log, trans, pass); | |
3470 | if (error) | |
1da177e4 | 3471 | return error; |
d0450948 | 3472 | |
00574da1 | 3473 | list_for_each_entry_safe(item, next, &trans->r_itemq, ri_list) { |
43ff2122 CH |
3474 | switch (pass) { |
3475 | case XLOG_RECOVER_PASS1: | |
c9f71f5f | 3476 | error = xlog_recover_commit_pass1(log, trans, item); |
43ff2122 CH |
3477 | break; |
3478 | case XLOG_RECOVER_PASS2: | |
00574da1 ZYW |
3479 | xlog_recover_ra_pass2(log, item); |
3480 | list_move_tail(&item->ri_list, &ra_list); | |
3481 | items_queued++; | |
3482 | if (items_queued >= XLOG_RECOVER_COMMIT_QUEUE_MAX) { | |
3483 | error = xlog_recover_items_pass2(log, trans, | |
3484 | &buffer_list, &ra_list); | |
3485 | list_splice_tail_init(&ra_list, &done_list); | |
3486 | items_queued = 0; | |
3487 | } | |
3488 | ||
43ff2122 CH |
3489 | break; |
3490 | default: | |
3491 | ASSERT(0); | |
3492 | } | |
3493 | ||
d0450948 | 3494 | if (error) |
43ff2122 | 3495 | goto out; |
d0450948 CH |
3496 | } |
3497 | ||
00574da1 ZYW |
3498 | out: |
3499 | if (!list_empty(&ra_list)) { | |
3500 | if (!error) | |
3501 | error = xlog_recover_items_pass2(log, trans, | |
3502 | &buffer_list, &ra_list); | |
3503 | list_splice_tail_init(&ra_list, &done_list); | |
3504 | } | |
3505 | ||
3506 | if (!list_empty(&done_list)) | |
3507 | list_splice_init(&done_list, &trans->r_itemq); | |
3508 | ||
d0450948 | 3509 | xlog_recover_free_trans(trans); |
43ff2122 | 3510 | |
43ff2122 CH |
3511 | error2 = xfs_buf_delwri_submit(&buffer_list); |
3512 | return error ? error : error2; | |
1da177e4 LT |
3513 | } |
3514 | ||
3515 | STATIC int | |
3516 | xlog_recover_unmount_trans( | |
ad223e60 MT |
3517 | struct xlog *log, |
3518 | struct xlog_recover *trans) | |
1da177e4 LT |
3519 | { |
3520 | /* Do nothing now */ | |
a0fa2b67 | 3521 | xfs_warn(log->l_mp, "%s: Unmount LR", __func__); |
1da177e4 LT |
3522 | return 0; |
3523 | } | |
3524 | ||
3525 | /* | |
3526 | * There are two valid states of the r_state field. 0 indicates that the | |
3527 | * transaction structure is in a normal state. We have either seen the | |
3528 | * start of the transaction or the last operation we added was not a partial | |
3529 | * operation. If the last operation we added to the transaction was a | |
3530 | * partial operation, we need to mark r_state with XLOG_WAS_CONT_TRANS. | |
3531 | * | |
3532 | * NOTE: skip LRs with 0 data length. | |
3533 | */ | |
3534 | STATIC int | |
3535 | xlog_recover_process_data( | |
9a8d2fdb | 3536 | struct xlog *log, |
f0a76953 | 3537 | struct hlist_head rhash[], |
9a8d2fdb | 3538 | struct xlog_rec_header *rhead, |
1da177e4 LT |
3539 | xfs_caddr_t dp, |
3540 | int pass) | |
3541 | { | |
3542 | xfs_caddr_t lp; | |
3543 | int num_logops; | |
3544 | xlog_op_header_t *ohead; | |
3545 | xlog_recover_t *trans; | |
3546 | xlog_tid_t tid; | |
3547 | int error; | |
3548 | unsigned long hash; | |
3549 | uint flags; | |
3550 | ||
b53e675d CH |
3551 | lp = dp + be32_to_cpu(rhead->h_len); |
3552 | num_logops = be32_to_cpu(rhead->h_num_logops); | |
1da177e4 LT |
3553 | |
3554 | /* check the log format matches our own - else we can't recover */ | |
3555 | if (xlog_header_check_recover(log->l_mp, rhead)) | |
3556 | return (XFS_ERROR(EIO)); | |
3557 | ||
3558 | while ((dp < lp) && num_logops) { | |
3559 | ASSERT(dp + sizeof(xlog_op_header_t) <= lp); | |
3560 | ohead = (xlog_op_header_t *)dp; | |
3561 | dp += sizeof(xlog_op_header_t); | |
3562 | if (ohead->oh_clientid != XFS_TRANSACTION && | |
3563 | ohead->oh_clientid != XFS_LOG) { | |
a0fa2b67 DC |
3564 | xfs_warn(log->l_mp, "%s: bad clientid 0x%x", |
3565 | __func__, ohead->oh_clientid); | |
1da177e4 LT |
3566 | ASSERT(0); |
3567 | return (XFS_ERROR(EIO)); | |
3568 | } | |
67fcb7bf | 3569 | tid = be32_to_cpu(ohead->oh_tid); |
1da177e4 | 3570 | hash = XLOG_RHASH(tid); |
f0a76953 | 3571 | trans = xlog_recover_find_tid(&rhash[hash], tid); |
1da177e4 LT |
3572 | if (trans == NULL) { /* not found; add new tid */ |
3573 | if (ohead->oh_flags & XLOG_START_TRANS) | |
3574 | xlog_recover_new_tid(&rhash[hash], tid, | |
b53e675d | 3575 | be64_to_cpu(rhead->h_lsn)); |
1da177e4 | 3576 | } else { |
9742bb93 | 3577 | if (dp + be32_to_cpu(ohead->oh_len) > lp) { |
a0fa2b67 DC |
3578 | xfs_warn(log->l_mp, "%s: bad length 0x%x", |
3579 | __func__, be32_to_cpu(ohead->oh_len)); | |
9742bb93 LM |
3580 | WARN_ON(1); |
3581 | return (XFS_ERROR(EIO)); | |
3582 | } | |
1da177e4 LT |
3583 | flags = ohead->oh_flags & ~XLOG_END_TRANS; |
3584 | if (flags & XLOG_WAS_CONT_TRANS) | |
3585 | flags &= ~XLOG_CONTINUE_TRANS; | |
3586 | switch (flags) { | |
3587 | case XLOG_COMMIT_TRANS: | |
3588 | error = xlog_recover_commit_trans(log, | |
f0a76953 | 3589 | trans, pass); |
1da177e4 LT |
3590 | break; |
3591 | case XLOG_UNMOUNT_TRANS: | |
a0fa2b67 | 3592 | error = xlog_recover_unmount_trans(log, trans); |
1da177e4 LT |
3593 | break; |
3594 | case XLOG_WAS_CONT_TRANS: | |
9abbc539 DC |
3595 | error = xlog_recover_add_to_cont_trans(log, |
3596 | trans, dp, | |
3597 | be32_to_cpu(ohead->oh_len)); | |
1da177e4 LT |
3598 | break; |
3599 | case XLOG_START_TRANS: | |
a0fa2b67 DC |
3600 | xfs_warn(log->l_mp, "%s: bad transaction", |
3601 | __func__); | |
1da177e4 LT |
3602 | ASSERT(0); |
3603 | error = XFS_ERROR(EIO); | |
3604 | break; | |
3605 | case 0: | |
3606 | case XLOG_CONTINUE_TRANS: | |
9abbc539 | 3607 | error = xlog_recover_add_to_trans(log, trans, |
67fcb7bf | 3608 | dp, be32_to_cpu(ohead->oh_len)); |
1da177e4 LT |
3609 | break; |
3610 | default: | |
a0fa2b67 DC |
3611 | xfs_warn(log->l_mp, "%s: bad flag 0x%x", |
3612 | __func__, flags); | |
1da177e4 LT |
3613 | ASSERT(0); |
3614 | error = XFS_ERROR(EIO); | |
3615 | break; | |
3616 | } | |
3617 | if (error) | |
3618 | return error; | |
3619 | } | |
67fcb7bf | 3620 | dp += be32_to_cpu(ohead->oh_len); |
1da177e4 LT |
3621 | num_logops--; |
3622 | } | |
3623 | return 0; | |
3624 | } | |
3625 | ||
3626 | /* | |
3627 | * Process an extent free intent item that was recovered from | |
3628 | * the log. We need to free the extents that it describes. | |
3629 | */ | |
3c1e2bbe | 3630 | STATIC int |
1da177e4 LT |
3631 | xlog_recover_process_efi( |
3632 | xfs_mount_t *mp, | |
3633 | xfs_efi_log_item_t *efip) | |
3634 | { | |
3635 | xfs_efd_log_item_t *efdp; | |
3636 | xfs_trans_t *tp; | |
3637 | int i; | |
3c1e2bbe | 3638 | int error = 0; |
1da177e4 LT |
3639 | xfs_extent_t *extp; |
3640 | xfs_fsblock_t startblock_fsb; | |
3641 | ||
b199c8a4 | 3642 | ASSERT(!test_bit(XFS_EFI_RECOVERED, &efip->efi_flags)); |
1da177e4 LT |
3643 | |
3644 | /* | |
3645 | * First check the validity of the extents described by the | |
3646 | * EFI. If any are bad, then assume that all are bad and | |
3647 | * just toss the EFI. | |
3648 | */ | |
3649 | for (i = 0; i < efip->efi_format.efi_nextents; i++) { | |
3650 | extp = &(efip->efi_format.efi_extents[i]); | |
3651 | startblock_fsb = XFS_BB_TO_FSB(mp, | |
3652 | XFS_FSB_TO_DADDR(mp, extp->ext_start)); | |
3653 | if ((startblock_fsb == 0) || | |
3654 | (extp->ext_len == 0) || | |
3655 | (startblock_fsb >= mp->m_sb.sb_dblocks) || | |
3656 | (extp->ext_len >= mp->m_sb.sb_agblocks)) { | |
3657 | /* | |
3658 | * This will pull the EFI from the AIL and | |
3659 | * free the memory associated with it. | |
3660 | */ | |
666d644c | 3661 | set_bit(XFS_EFI_RECOVERED, &efip->efi_flags); |
1da177e4 | 3662 | xfs_efi_release(efip, efip->efi_format.efi_nextents); |
3c1e2bbe | 3663 | return XFS_ERROR(EIO); |
1da177e4 LT |
3664 | } |
3665 | } | |
3666 | ||
3667 | tp = xfs_trans_alloc(mp, 0); | |
3d3c8b52 | 3668 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0); |
fc6149d8 DC |
3669 | if (error) |
3670 | goto abort_error; | |
1da177e4 LT |
3671 | efdp = xfs_trans_get_efd(tp, efip, efip->efi_format.efi_nextents); |
3672 | ||
3673 | for (i = 0; i < efip->efi_format.efi_nextents; i++) { | |
3674 | extp = &(efip->efi_format.efi_extents[i]); | |
fc6149d8 DC |
3675 | error = xfs_free_extent(tp, extp->ext_start, extp->ext_len); |
3676 | if (error) | |
3677 | goto abort_error; | |
1da177e4 LT |
3678 | xfs_trans_log_efd_extent(tp, efdp, extp->ext_start, |
3679 | extp->ext_len); | |
3680 | } | |
3681 | ||
b199c8a4 | 3682 | set_bit(XFS_EFI_RECOVERED, &efip->efi_flags); |
e5720eec | 3683 | error = xfs_trans_commit(tp, 0); |
3c1e2bbe | 3684 | return error; |
fc6149d8 DC |
3685 | |
3686 | abort_error: | |
3687 | xfs_trans_cancel(tp, XFS_TRANS_ABORT); | |
3688 | return error; | |
1da177e4 LT |
3689 | } |
3690 | ||
1da177e4 LT |
3691 | /* |
3692 | * When this is called, all of the EFIs which did not have | |
3693 | * corresponding EFDs should be in the AIL. What we do now | |
3694 | * is free the extents associated with each one. | |
3695 | * | |
3696 | * Since we process the EFIs in normal transactions, they | |
3697 | * will be removed at some point after the commit. This prevents | |
3698 | * us from just walking down the list processing each one. | |
3699 | * We'll use a flag in the EFI to skip those that we've already | |
3700 | * processed and use the AIL iteration mechanism's generation | |
3701 | * count to try to speed this up at least a bit. | |
3702 | * | |
3703 | * When we start, we know that the EFIs are the only things in | |
3704 | * the AIL. As we process them, however, other items are added | |
3705 | * to the AIL. Since everything added to the AIL must come after | |
3706 | * everything already in the AIL, we stop processing as soon as | |
3707 | * we see something other than an EFI in the AIL. | |
3708 | */ | |
3c1e2bbe | 3709 | STATIC int |
1da177e4 | 3710 | xlog_recover_process_efis( |
9a8d2fdb | 3711 | struct xlog *log) |
1da177e4 LT |
3712 | { |
3713 | xfs_log_item_t *lip; | |
3714 | xfs_efi_log_item_t *efip; | |
3c1e2bbe | 3715 | int error = 0; |
27d8d5fe | 3716 | struct xfs_ail_cursor cur; |
a9c21c1b | 3717 | struct xfs_ail *ailp; |
1da177e4 | 3718 | |
a9c21c1b DC |
3719 | ailp = log->l_ailp; |
3720 | spin_lock(&ailp->xa_lock); | |
3721 | lip = xfs_trans_ail_cursor_first(ailp, &cur, 0); | |
1da177e4 LT |
3722 | while (lip != NULL) { |
3723 | /* | |
3724 | * We're done when we see something other than an EFI. | |
27d8d5fe | 3725 | * There should be no EFIs left in the AIL now. |
1da177e4 LT |
3726 | */ |
3727 | if (lip->li_type != XFS_LI_EFI) { | |
27d8d5fe | 3728 | #ifdef DEBUG |
a9c21c1b | 3729 | for (; lip; lip = xfs_trans_ail_cursor_next(ailp, &cur)) |
27d8d5fe DC |
3730 | ASSERT(lip->li_type != XFS_LI_EFI); |
3731 | #endif | |
1da177e4 LT |
3732 | break; |
3733 | } | |
3734 | ||
3735 | /* | |
3736 | * Skip EFIs that we've already processed. | |
3737 | */ | |
3738 | efip = (xfs_efi_log_item_t *)lip; | |
b199c8a4 | 3739 | if (test_bit(XFS_EFI_RECOVERED, &efip->efi_flags)) { |
a9c21c1b | 3740 | lip = xfs_trans_ail_cursor_next(ailp, &cur); |
1da177e4 LT |
3741 | continue; |
3742 | } | |
3743 | ||
a9c21c1b DC |
3744 | spin_unlock(&ailp->xa_lock); |
3745 | error = xlog_recover_process_efi(log->l_mp, efip); | |
3746 | spin_lock(&ailp->xa_lock); | |
27d8d5fe DC |
3747 | if (error) |
3748 | goto out; | |
a9c21c1b | 3749 | lip = xfs_trans_ail_cursor_next(ailp, &cur); |
1da177e4 | 3750 | } |
27d8d5fe | 3751 | out: |
a9c21c1b DC |
3752 | xfs_trans_ail_cursor_done(ailp, &cur); |
3753 | spin_unlock(&ailp->xa_lock); | |
3c1e2bbe | 3754 | return error; |
1da177e4 LT |
3755 | } |
3756 | ||
3757 | /* | |
3758 | * This routine performs a transaction to null out a bad inode pointer | |
3759 | * in an agi unlinked inode hash bucket. | |
3760 | */ | |
3761 | STATIC void | |
3762 | xlog_recover_clear_agi_bucket( | |
3763 | xfs_mount_t *mp, | |
3764 | xfs_agnumber_t agno, | |
3765 | int bucket) | |
3766 | { | |
3767 | xfs_trans_t *tp; | |
3768 | xfs_agi_t *agi; | |
3769 | xfs_buf_t *agibp; | |
3770 | int offset; | |
3771 | int error; | |
3772 | ||
3773 | tp = xfs_trans_alloc(mp, XFS_TRANS_CLEAR_AGI_BUCKET); | |
3d3c8b52 | 3774 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_clearagi, 0, 0); |
e5720eec DC |
3775 | if (error) |
3776 | goto out_abort; | |
1da177e4 | 3777 | |
5e1be0fb CH |
3778 | error = xfs_read_agi(mp, tp, agno, &agibp); |
3779 | if (error) | |
e5720eec | 3780 | goto out_abort; |
1da177e4 | 3781 | |
5e1be0fb | 3782 | agi = XFS_BUF_TO_AGI(agibp); |
16259e7d | 3783 | agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO); |
1da177e4 LT |
3784 | offset = offsetof(xfs_agi_t, agi_unlinked) + |
3785 | (sizeof(xfs_agino_t) * bucket); | |
3786 | xfs_trans_log_buf(tp, agibp, offset, | |
3787 | (offset + sizeof(xfs_agino_t) - 1)); | |
3788 | ||
e5720eec DC |
3789 | error = xfs_trans_commit(tp, 0); |
3790 | if (error) | |
3791 | goto out_error; | |
3792 | return; | |
3793 | ||
3794 | out_abort: | |
3795 | xfs_trans_cancel(tp, XFS_TRANS_ABORT); | |
3796 | out_error: | |
a0fa2b67 | 3797 | xfs_warn(mp, "%s: failed to clear agi %d. Continuing.", __func__, agno); |
e5720eec | 3798 | return; |
1da177e4 LT |
3799 | } |
3800 | ||
23fac50f CH |
3801 | STATIC xfs_agino_t |
3802 | xlog_recover_process_one_iunlink( | |
3803 | struct xfs_mount *mp, | |
3804 | xfs_agnumber_t agno, | |
3805 | xfs_agino_t agino, | |
3806 | int bucket) | |
3807 | { | |
3808 | struct xfs_buf *ibp; | |
3809 | struct xfs_dinode *dip; | |
3810 | struct xfs_inode *ip; | |
3811 | xfs_ino_t ino; | |
3812 | int error; | |
3813 | ||
3814 | ino = XFS_AGINO_TO_INO(mp, agno, agino); | |
7b6259e7 | 3815 | error = xfs_iget(mp, NULL, ino, 0, 0, &ip); |
23fac50f CH |
3816 | if (error) |
3817 | goto fail; | |
3818 | ||
3819 | /* | |
3820 | * Get the on disk inode to find the next inode in the bucket. | |
3821 | */ | |
475ee413 | 3822 | error = xfs_imap_to_bp(mp, NULL, &ip->i_imap, &dip, &ibp, 0, 0); |
23fac50f | 3823 | if (error) |
0e446673 | 3824 | goto fail_iput; |
23fac50f | 3825 | |
23fac50f | 3826 | ASSERT(ip->i_d.di_nlink == 0); |
0e446673 | 3827 | ASSERT(ip->i_d.di_mode != 0); |
23fac50f CH |
3828 | |
3829 | /* setup for the next pass */ | |
3830 | agino = be32_to_cpu(dip->di_next_unlinked); | |
3831 | xfs_buf_relse(ibp); | |
3832 | ||
3833 | /* | |
3834 | * Prevent any DMAPI event from being sent when the reference on | |
3835 | * the inode is dropped. | |
3836 | */ | |
3837 | ip->i_d.di_dmevmask = 0; | |
3838 | ||
0e446673 | 3839 | IRELE(ip); |
23fac50f CH |
3840 | return agino; |
3841 | ||
0e446673 CH |
3842 | fail_iput: |
3843 | IRELE(ip); | |
23fac50f CH |
3844 | fail: |
3845 | /* | |
3846 | * We can't read in the inode this bucket points to, or this inode | |
3847 | * is messed up. Just ditch this bucket of inodes. We will lose | |
3848 | * some inodes and space, but at least we won't hang. | |
3849 | * | |
3850 | * Call xlog_recover_clear_agi_bucket() to perform a transaction to | |
3851 | * clear the inode pointer in the bucket. | |
3852 | */ | |
3853 | xlog_recover_clear_agi_bucket(mp, agno, bucket); | |
3854 | return NULLAGINO; | |
3855 | } | |
3856 | ||
1da177e4 LT |
3857 | /* |
3858 | * xlog_iunlink_recover | |
3859 | * | |
3860 | * This is called during recovery to process any inodes which | |
3861 | * we unlinked but not freed when the system crashed. These | |
3862 | * inodes will be on the lists in the AGI blocks. What we do | |
3863 | * here is scan all the AGIs and fully truncate and free any | |
3864 | * inodes found on the lists. Each inode is removed from the | |
3865 | * lists when it has been fully truncated and is freed. The | |
3866 | * freeing of the inode and its removal from the list must be | |
3867 | * atomic. | |
3868 | */ | |
d96f8f89 | 3869 | STATIC void |
1da177e4 | 3870 | xlog_recover_process_iunlinks( |
9a8d2fdb | 3871 | struct xlog *log) |
1da177e4 LT |
3872 | { |
3873 | xfs_mount_t *mp; | |
3874 | xfs_agnumber_t agno; | |
3875 | xfs_agi_t *agi; | |
3876 | xfs_buf_t *agibp; | |
1da177e4 | 3877 | xfs_agino_t agino; |
1da177e4 LT |
3878 | int bucket; |
3879 | int error; | |
3880 | uint mp_dmevmask; | |
3881 | ||
3882 | mp = log->l_mp; | |
3883 | ||
3884 | /* | |
3885 | * Prevent any DMAPI event from being sent while in this function. | |
3886 | */ | |
3887 | mp_dmevmask = mp->m_dmevmask; | |
3888 | mp->m_dmevmask = 0; | |
3889 | ||
3890 | for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) { | |
3891 | /* | |
3892 | * Find the agi for this ag. | |
3893 | */ | |
5e1be0fb CH |
3894 | error = xfs_read_agi(mp, NULL, agno, &agibp); |
3895 | if (error) { | |
3896 | /* | |
3897 | * AGI is b0rked. Don't process it. | |
3898 | * | |
3899 | * We should probably mark the filesystem as corrupt | |
3900 | * after we've recovered all the ag's we can.... | |
3901 | */ | |
3902 | continue; | |
1da177e4 | 3903 | } |
d97d32ed JK |
3904 | /* |
3905 | * Unlock the buffer so that it can be acquired in the normal | |
3906 | * course of the transaction to truncate and free each inode. | |
3907 | * Because we are not racing with anyone else here for the AGI | |
3908 | * buffer, we don't even need to hold it locked to read the | |
3909 | * initial unlinked bucket entries out of the buffer. We keep | |
3910 | * buffer reference though, so that it stays pinned in memory | |
3911 | * while we need the buffer. | |
3912 | */ | |
1da177e4 | 3913 | agi = XFS_BUF_TO_AGI(agibp); |
d97d32ed | 3914 | xfs_buf_unlock(agibp); |
1da177e4 LT |
3915 | |
3916 | for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++) { | |
16259e7d | 3917 | agino = be32_to_cpu(agi->agi_unlinked[bucket]); |
1da177e4 | 3918 | while (agino != NULLAGINO) { |
23fac50f CH |
3919 | agino = xlog_recover_process_one_iunlink(mp, |
3920 | agno, agino, bucket); | |
1da177e4 LT |
3921 | } |
3922 | } | |
d97d32ed | 3923 | xfs_buf_rele(agibp); |
1da177e4 LT |
3924 | } |
3925 | ||
3926 | mp->m_dmevmask = mp_dmevmask; | |
3927 | } | |
3928 | ||
1da177e4 | 3929 | /* |
0e446be4 CH |
3930 | * Upack the log buffer data and crc check it. If the check fails, issue a |
3931 | * warning if and only if the CRC in the header is non-zero. This makes the | |
3932 | * check an advisory warning, and the zero CRC check will prevent failure | |
3933 | * warnings from being emitted when upgrading the kernel from one that does not | |
3934 | * add CRCs by default. | |
3935 | * | |
3936 | * When filesystems are CRC enabled, this CRC mismatch becomes a fatal log | |
3937 | * corruption failure | |
1da177e4 | 3938 | */ |
0e446be4 CH |
3939 | STATIC int |
3940 | xlog_unpack_data_crc( | |
3941 | struct xlog_rec_header *rhead, | |
3942 | xfs_caddr_t dp, | |
3943 | struct xlog *log) | |
1da177e4 | 3944 | { |
f9668a09 | 3945 | __le32 crc; |
0e446be4 CH |
3946 | |
3947 | crc = xlog_cksum(log, rhead, dp, be32_to_cpu(rhead->h_len)); | |
3948 | if (crc != rhead->h_crc) { | |
3949 | if (rhead->h_crc || xfs_sb_version_hascrc(&log->l_mp->m_sb)) { | |
3950 | xfs_alert(log->l_mp, | |
08e96e1a | 3951 | "log record CRC mismatch: found 0x%x, expected 0x%x.", |
f9668a09 DC |
3952 | le32_to_cpu(rhead->h_crc), |
3953 | le32_to_cpu(crc)); | |
0e446be4 | 3954 | xfs_hex_dump(dp, 32); |
1da177e4 LT |
3955 | } |
3956 | ||
0e446be4 CH |
3957 | /* |
3958 | * If we've detected a log record corruption, then we can't | |
3959 | * recover past this point. Abort recovery if we are enforcing | |
3960 | * CRC protection by punting an error back up the stack. | |
3961 | */ | |
3962 | if (xfs_sb_version_hascrc(&log->l_mp->m_sb)) | |
3963 | return EFSCORRUPTED; | |
1da177e4 | 3964 | } |
0e446be4 CH |
3965 | |
3966 | return 0; | |
1da177e4 LT |
3967 | } |
3968 | ||
0e446be4 | 3969 | STATIC int |
1da177e4 | 3970 | xlog_unpack_data( |
9a8d2fdb | 3971 | struct xlog_rec_header *rhead, |
1da177e4 | 3972 | xfs_caddr_t dp, |
9a8d2fdb | 3973 | struct xlog *log) |
1da177e4 LT |
3974 | { |
3975 | int i, j, k; | |
0e446be4 CH |
3976 | int error; |
3977 | ||
3978 | error = xlog_unpack_data_crc(rhead, dp, log); | |
3979 | if (error) | |
3980 | return error; | |
1da177e4 | 3981 | |
b53e675d | 3982 | for (i = 0; i < BTOBB(be32_to_cpu(rhead->h_len)) && |
1da177e4 | 3983 | i < (XLOG_HEADER_CYCLE_SIZE / BBSIZE); i++) { |
b53e675d | 3984 | *(__be32 *)dp = *(__be32 *)&rhead->h_cycle_data[i]; |
1da177e4 LT |
3985 | dp += BBSIZE; |
3986 | } | |
3987 | ||
62118709 | 3988 | if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { |
b28708d6 | 3989 | xlog_in_core_2_t *xhdr = (xlog_in_core_2_t *)rhead; |
b53e675d | 3990 | for ( ; i < BTOBB(be32_to_cpu(rhead->h_len)); i++) { |
1da177e4 LT |
3991 | j = i / (XLOG_HEADER_CYCLE_SIZE / BBSIZE); |
3992 | k = i % (XLOG_HEADER_CYCLE_SIZE / BBSIZE); | |
b53e675d | 3993 | *(__be32 *)dp = xhdr[j].hic_xheader.xh_cycle_data[k]; |
1da177e4 LT |
3994 | dp += BBSIZE; |
3995 | } | |
3996 | } | |
0e446be4 CH |
3997 | |
3998 | return 0; | |
1da177e4 LT |
3999 | } |
4000 | ||
4001 | STATIC int | |
4002 | xlog_valid_rec_header( | |
9a8d2fdb MT |
4003 | struct xlog *log, |
4004 | struct xlog_rec_header *rhead, | |
1da177e4 LT |
4005 | xfs_daddr_t blkno) |
4006 | { | |
4007 | int hlen; | |
4008 | ||
69ef921b | 4009 | if (unlikely(rhead->h_magicno != cpu_to_be32(XLOG_HEADER_MAGIC_NUM))) { |
1da177e4 LT |
4010 | XFS_ERROR_REPORT("xlog_valid_rec_header(1)", |
4011 | XFS_ERRLEVEL_LOW, log->l_mp); | |
4012 | return XFS_ERROR(EFSCORRUPTED); | |
4013 | } | |
4014 | if (unlikely( | |
4015 | (!rhead->h_version || | |
b53e675d | 4016 | (be32_to_cpu(rhead->h_version) & (~XLOG_VERSION_OKBITS))))) { |
a0fa2b67 | 4017 | xfs_warn(log->l_mp, "%s: unrecognised log version (%d).", |
34a622b2 | 4018 | __func__, be32_to_cpu(rhead->h_version)); |
1da177e4 LT |
4019 | return XFS_ERROR(EIO); |
4020 | } | |
4021 | ||
4022 | /* LR body must have data or it wouldn't have been written */ | |
b53e675d | 4023 | hlen = be32_to_cpu(rhead->h_len); |
1da177e4 LT |
4024 | if (unlikely( hlen <= 0 || hlen > INT_MAX )) { |
4025 | XFS_ERROR_REPORT("xlog_valid_rec_header(2)", | |
4026 | XFS_ERRLEVEL_LOW, log->l_mp); | |
4027 | return XFS_ERROR(EFSCORRUPTED); | |
4028 | } | |
4029 | if (unlikely( blkno > log->l_logBBsize || blkno > INT_MAX )) { | |
4030 | XFS_ERROR_REPORT("xlog_valid_rec_header(3)", | |
4031 | XFS_ERRLEVEL_LOW, log->l_mp); | |
4032 | return XFS_ERROR(EFSCORRUPTED); | |
4033 | } | |
4034 | return 0; | |
4035 | } | |
4036 | ||
4037 | /* | |
4038 | * Read the log from tail to head and process the log records found. | |
4039 | * Handle the two cases where the tail and head are in the same cycle | |
4040 | * and where the active portion of the log wraps around the end of | |
4041 | * the physical log separately. The pass parameter is passed through | |
4042 | * to the routines called to process the data and is not looked at | |
4043 | * here. | |
4044 | */ | |
4045 | STATIC int | |
4046 | xlog_do_recovery_pass( | |
9a8d2fdb | 4047 | struct xlog *log, |
1da177e4 LT |
4048 | xfs_daddr_t head_blk, |
4049 | xfs_daddr_t tail_blk, | |
4050 | int pass) | |
4051 | { | |
4052 | xlog_rec_header_t *rhead; | |
4053 | xfs_daddr_t blk_no; | |
fc5bc4c8 | 4054 | xfs_caddr_t offset; |
1da177e4 LT |
4055 | xfs_buf_t *hbp, *dbp; |
4056 | int error = 0, h_size; | |
4057 | int bblks, split_bblks; | |
4058 | int hblks, split_hblks, wrapped_hblks; | |
f0a76953 | 4059 | struct hlist_head rhash[XLOG_RHASH_SIZE]; |
1da177e4 LT |
4060 | |
4061 | ASSERT(head_blk != tail_blk); | |
4062 | ||
4063 | /* | |
4064 | * Read the header of the tail block and get the iclog buffer size from | |
4065 | * h_size. Use this to tell how many sectors make up the log header. | |
4066 | */ | |
62118709 | 4067 | if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { |
1da177e4 LT |
4068 | /* |
4069 | * When using variable length iclogs, read first sector of | |
4070 | * iclog header and extract the header size from it. Get a | |
4071 | * new hbp that is the correct size. | |
4072 | */ | |
4073 | hbp = xlog_get_bp(log, 1); | |
4074 | if (!hbp) | |
4075 | return ENOMEM; | |
076e6acb CH |
4076 | |
4077 | error = xlog_bread(log, tail_blk, 1, hbp, &offset); | |
4078 | if (error) | |
1da177e4 | 4079 | goto bread_err1; |
076e6acb | 4080 | |
1da177e4 LT |
4081 | rhead = (xlog_rec_header_t *)offset; |
4082 | error = xlog_valid_rec_header(log, rhead, tail_blk); | |
4083 | if (error) | |
4084 | goto bread_err1; | |
b53e675d CH |
4085 | h_size = be32_to_cpu(rhead->h_size); |
4086 | if ((be32_to_cpu(rhead->h_version) & XLOG_VERSION_2) && | |
1da177e4 LT |
4087 | (h_size > XLOG_HEADER_CYCLE_SIZE)) { |
4088 | hblks = h_size / XLOG_HEADER_CYCLE_SIZE; | |
4089 | if (h_size % XLOG_HEADER_CYCLE_SIZE) | |
4090 | hblks++; | |
4091 | xlog_put_bp(hbp); | |
4092 | hbp = xlog_get_bp(log, hblks); | |
4093 | } else { | |
4094 | hblks = 1; | |
4095 | } | |
4096 | } else { | |
69ce58f0 | 4097 | ASSERT(log->l_sectBBsize == 1); |
1da177e4 LT |
4098 | hblks = 1; |
4099 | hbp = xlog_get_bp(log, 1); | |
4100 | h_size = XLOG_BIG_RECORD_BSIZE; | |
4101 | } | |
4102 | ||
4103 | if (!hbp) | |
4104 | return ENOMEM; | |
4105 | dbp = xlog_get_bp(log, BTOBB(h_size)); | |
4106 | if (!dbp) { | |
4107 | xlog_put_bp(hbp); | |
4108 | return ENOMEM; | |
4109 | } | |
4110 | ||
4111 | memset(rhash, 0, sizeof(rhash)); | |
4112 | if (tail_blk <= head_blk) { | |
4113 | for (blk_no = tail_blk; blk_no < head_blk; ) { | |
076e6acb CH |
4114 | error = xlog_bread(log, blk_no, hblks, hbp, &offset); |
4115 | if (error) | |
1da177e4 | 4116 | goto bread_err2; |
076e6acb | 4117 | |
1da177e4 LT |
4118 | rhead = (xlog_rec_header_t *)offset; |
4119 | error = xlog_valid_rec_header(log, rhead, blk_no); | |
4120 | if (error) | |
4121 | goto bread_err2; | |
4122 | ||
4123 | /* blocks in data section */ | |
b53e675d | 4124 | bblks = (int)BTOBB(be32_to_cpu(rhead->h_len)); |
076e6acb CH |
4125 | error = xlog_bread(log, blk_no + hblks, bblks, dbp, |
4126 | &offset); | |
1da177e4 LT |
4127 | if (error) |
4128 | goto bread_err2; | |
076e6acb | 4129 | |
0e446be4 CH |
4130 | error = xlog_unpack_data(rhead, offset, log); |
4131 | if (error) | |
4132 | goto bread_err2; | |
4133 | ||
4134 | error = xlog_recover_process_data(log, | |
4135 | rhash, rhead, offset, pass); | |
4136 | if (error) | |
1da177e4 LT |
4137 | goto bread_err2; |
4138 | blk_no += bblks + hblks; | |
4139 | } | |
4140 | } else { | |
4141 | /* | |
4142 | * Perform recovery around the end of the physical log. | |
4143 | * When the head is not on the same cycle number as the tail, | |
4144 | * we can't do a sequential recovery as above. | |
4145 | */ | |
4146 | blk_no = tail_blk; | |
4147 | while (blk_no < log->l_logBBsize) { | |
4148 | /* | |
4149 | * Check for header wrapping around physical end-of-log | |
4150 | */ | |
62926044 | 4151 | offset = hbp->b_addr; |
1da177e4 LT |
4152 | split_hblks = 0; |
4153 | wrapped_hblks = 0; | |
4154 | if (blk_no + hblks <= log->l_logBBsize) { | |
4155 | /* Read header in one read */ | |
076e6acb CH |
4156 | error = xlog_bread(log, blk_no, hblks, hbp, |
4157 | &offset); | |
1da177e4 LT |
4158 | if (error) |
4159 | goto bread_err2; | |
1da177e4 LT |
4160 | } else { |
4161 | /* This LR is split across physical log end */ | |
4162 | if (blk_no != log->l_logBBsize) { | |
4163 | /* some data before physical log end */ | |
4164 | ASSERT(blk_no <= INT_MAX); | |
4165 | split_hblks = log->l_logBBsize - (int)blk_no; | |
4166 | ASSERT(split_hblks > 0); | |
076e6acb CH |
4167 | error = xlog_bread(log, blk_no, |
4168 | split_hblks, hbp, | |
4169 | &offset); | |
4170 | if (error) | |
1da177e4 | 4171 | goto bread_err2; |
1da177e4 | 4172 | } |
076e6acb | 4173 | |
1da177e4 LT |
4174 | /* |
4175 | * Note: this black magic still works with | |
4176 | * large sector sizes (non-512) only because: | |
4177 | * - we increased the buffer size originally | |
4178 | * by 1 sector giving us enough extra space | |
4179 | * for the second read; | |
4180 | * - the log start is guaranteed to be sector | |
4181 | * aligned; | |
4182 | * - we read the log end (LR header start) | |
4183 | * _first_, then the log start (LR header end) | |
4184 | * - order is important. | |
4185 | */ | |
234f56ac | 4186 | wrapped_hblks = hblks - split_hblks; |
44396476 DC |
4187 | error = xlog_bread_offset(log, 0, |
4188 | wrapped_hblks, hbp, | |
4189 | offset + BBTOB(split_hblks)); | |
1da177e4 LT |
4190 | if (error) |
4191 | goto bread_err2; | |
1da177e4 LT |
4192 | } |
4193 | rhead = (xlog_rec_header_t *)offset; | |
4194 | error = xlog_valid_rec_header(log, rhead, | |
4195 | split_hblks ? blk_no : 0); | |
4196 | if (error) | |
4197 | goto bread_err2; | |
4198 | ||
b53e675d | 4199 | bblks = (int)BTOBB(be32_to_cpu(rhead->h_len)); |
1da177e4 LT |
4200 | blk_no += hblks; |
4201 | ||
4202 | /* Read in data for log record */ | |
4203 | if (blk_no + bblks <= log->l_logBBsize) { | |
076e6acb CH |
4204 | error = xlog_bread(log, blk_no, bblks, dbp, |
4205 | &offset); | |
1da177e4 LT |
4206 | if (error) |
4207 | goto bread_err2; | |
1da177e4 LT |
4208 | } else { |
4209 | /* This log record is split across the | |
4210 | * physical end of log */ | |
62926044 | 4211 | offset = dbp->b_addr; |
1da177e4 LT |
4212 | split_bblks = 0; |
4213 | if (blk_no != log->l_logBBsize) { | |
4214 | /* some data is before the physical | |
4215 | * end of log */ | |
4216 | ASSERT(!wrapped_hblks); | |
4217 | ASSERT(blk_no <= INT_MAX); | |
4218 | split_bblks = | |
4219 | log->l_logBBsize - (int)blk_no; | |
4220 | ASSERT(split_bblks > 0); | |
076e6acb CH |
4221 | error = xlog_bread(log, blk_no, |
4222 | split_bblks, dbp, | |
4223 | &offset); | |
4224 | if (error) | |
1da177e4 | 4225 | goto bread_err2; |
1da177e4 | 4226 | } |
076e6acb | 4227 | |
1da177e4 LT |
4228 | /* |
4229 | * Note: this black magic still works with | |
4230 | * large sector sizes (non-512) only because: | |
4231 | * - we increased the buffer size originally | |
4232 | * by 1 sector giving us enough extra space | |
4233 | * for the second read; | |
4234 | * - the log start is guaranteed to be sector | |
4235 | * aligned; | |
4236 | * - we read the log end (LR header start) | |
4237 | * _first_, then the log start (LR header end) | |
4238 | * - order is important. | |
4239 | */ | |
44396476 | 4240 | error = xlog_bread_offset(log, 0, |
009507b0 | 4241 | bblks - split_bblks, dbp, |
44396476 | 4242 | offset + BBTOB(split_bblks)); |
076e6acb CH |
4243 | if (error) |
4244 | goto bread_err2; | |
1da177e4 | 4245 | } |
0e446be4 CH |
4246 | |
4247 | error = xlog_unpack_data(rhead, offset, log); | |
4248 | if (error) | |
4249 | goto bread_err2; | |
4250 | ||
4251 | error = xlog_recover_process_data(log, rhash, | |
4252 | rhead, offset, pass); | |
4253 | if (error) | |
1da177e4 LT |
4254 | goto bread_err2; |
4255 | blk_no += bblks; | |
4256 | } | |
4257 | ||
4258 | ASSERT(blk_no >= log->l_logBBsize); | |
4259 | blk_no -= log->l_logBBsize; | |
4260 | ||
4261 | /* read first part of physical log */ | |
4262 | while (blk_no < head_blk) { | |
076e6acb CH |
4263 | error = xlog_bread(log, blk_no, hblks, hbp, &offset); |
4264 | if (error) | |
1da177e4 | 4265 | goto bread_err2; |
076e6acb | 4266 | |
1da177e4 LT |
4267 | rhead = (xlog_rec_header_t *)offset; |
4268 | error = xlog_valid_rec_header(log, rhead, blk_no); | |
4269 | if (error) | |
4270 | goto bread_err2; | |
076e6acb | 4271 | |
b53e675d | 4272 | bblks = (int)BTOBB(be32_to_cpu(rhead->h_len)); |
076e6acb CH |
4273 | error = xlog_bread(log, blk_no+hblks, bblks, dbp, |
4274 | &offset); | |
4275 | if (error) | |
1da177e4 | 4276 | goto bread_err2; |
076e6acb | 4277 | |
0e446be4 CH |
4278 | error = xlog_unpack_data(rhead, offset, log); |
4279 | if (error) | |
4280 | goto bread_err2; | |
4281 | ||
4282 | error = xlog_recover_process_data(log, rhash, | |
4283 | rhead, offset, pass); | |
4284 | if (error) | |
1da177e4 LT |
4285 | goto bread_err2; |
4286 | blk_no += bblks + hblks; | |
4287 | } | |
4288 | } | |
4289 | ||
4290 | bread_err2: | |
4291 | xlog_put_bp(dbp); | |
4292 | bread_err1: | |
4293 | xlog_put_bp(hbp); | |
4294 | return error; | |
4295 | } | |
4296 | ||
4297 | /* | |
4298 | * Do the recovery of the log. We actually do this in two phases. | |
4299 | * The two passes are necessary in order to implement the function | |
4300 | * of cancelling a record written into the log. The first pass | |
4301 | * determines those things which have been cancelled, and the | |
4302 | * second pass replays log items normally except for those which | |
4303 | * have been cancelled. The handling of the replay and cancellations | |
4304 | * takes place in the log item type specific routines. | |
4305 | * | |
4306 | * The table of items which have cancel records in the log is allocated | |
4307 | * and freed at this level, since only here do we know when all of | |
4308 | * the log recovery has been completed. | |
4309 | */ | |
4310 | STATIC int | |
4311 | xlog_do_log_recovery( | |
9a8d2fdb | 4312 | struct xlog *log, |
1da177e4 LT |
4313 | xfs_daddr_t head_blk, |
4314 | xfs_daddr_t tail_blk) | |
4315 | { | |
d5689eaa | 4316 | int error, i; |
1da177e4 LT |
4317 | |
4318 | ASSERT(head_blk != tail_blk); | |
4319 | ||
4320 | /* | |
4321 | * First do a pass to find all of the cancelled buf log items. | |
4322 | * Store them in the buf_cancel_table for use in the second pass. | |
4323 | */ | |
d5689eaa CH |
4324 | log->l_buf_cancel_table = kmem_zalloc(XLOG_BC_TABLE_SIZE * |
4325 | sizeof(struct list_head), | |
1da177e4 | 4326 | KM_SLEEP); |
d5689eaa CH |
4327 | for (i = 0; i < XLOG_BC_TABLE_SIZE; i++) |
4328 | INIT_LIST_HEAD(&log->l_buf_cancel_table[i]); | |
4329 | ||
1da177e4 LT |
4330 | error = xlog_do_recovery_pass(log, head_blk, tail_blk, |
4331 | XLOG_RECOVER_PASS1); | |
4332 | if (error != 0) { | |
f0e2d93c | 4333 | kmem_free(log->l_buf_cancel_table); |
1da177e4 LT |
4334 | log->l_buf_cancel_table = NULL; |
4335 | return error; | |
4336 | } | |
4337 | /* | |
4338 | * Then do a second pass to actually recover the items in the log. | |
4339 | * When it is complete free the table of buf cancel items. | |
4340 | */ | |
4341 | error = xlog_do_recovery_pass(log, head_blk, tail_blk, | |
4342 | XLOG_RECOVER_PASS2); | |
4343 | #ifdef DEBUG | |
6d192a9b | 4344 | if (!error) { |
1da177e4 LT |
4345 | int i; |
4346 | ||
4347 | for (i = 0; i < XLOG_BC_TABLE_SIZE; i++) | |
d5689eaa | 4348 | ASSERT(list_empty(&log->l_buf_cancel_table[i])); |
1da177e4 LT |
4349 | } |
4350 | #endif /* DEBUG */ | |
4351 | ||
f0e2d93c | 4352 | kmem_free(log->l_buf_cancel_table); |
1da177e4 LT |
4353 | log->l_buf_cancel_table = NULL; |
4354 | ||
4355 | return error; | |
4356 | } | |
4357 | ||
4358 | /* | |
4359 | * Do the actual recovery | |
4360 | */ | |
4361 | STATIC int | |
4362 | xlog_do_recover( | |
9a8d2fdb | 4363 | struct xlog *log, |
1da177e4 LT |
4364 | xfs_daddr_t head_blk, |
4365 | xfs_daddr_t tail_blk) | |
4366 | { | |
4367 | int error; | |
4368 | xfs_buf_t *bp; | |
4369 | xfs_sb_t *sbp; | |
4370 | ||
4371 | /* | |
4372 | * First replay the images in the log. | |
4373 | */ | |
4374 | error = xlog_do_log_recovery(log, head_blk, tail_blk); | |
43ff2122 | 4375 | if (error) |
1da177e4 | 4376 | return error; |
1da177e4 LT |
4377 | |
4378 | /* | |
4379 | * If IO errors happened during recovery, bail out. | |
4380 | */ | |
4381 | if (XFS_FORCED_SHUTDOWN(log->l_mp)) { | |
4382 | return (EIO); | |
4383 | } | |
4384 | ||
4385 | /* | |
4386 | * We now update the tail_lsn since much of the recovery has completed | |
4387 | * and there may be space available to use. If there were no extent | |
4388 | * or iunlinks, we can free up the entire log and set the tail_lsn to | |
4389 | * be the last_sync_lsn. This was set in xlog_find_tail to be the | |
4390 | * lsn of the last known good LR on disk. If there are extent frees | |
4391 | * or iunlinks they will have some entries in the AIL; so we look at | |
4392 | * the AIL to determine how to set the tail_lsn. | |
4393 | */ | |
4394 | xlog_assign_tail_lsn(log->l_mp); | |
4395 | ||
4396 | /* | |
4397 | * Now that we've finished replaying all buffer and inode | |
98021821 | 4398 | * updates, re-read in the superblock and reverify it. |
1da177e4 LT |
4399 | */ |
4400 | bp = xfs_getsb(log->l_mp, 0); | |
4401 | XFS_BUF_UNDONE(bp); | |
bebf963f | 4402 | ASSERT(!(XFS_BUF_ISWRITE(bp))); |
1da177e4 | 4403 | XFS_BUF_READ(bp); |
bebf963f | 4404 | XFS_BUF_UNASYNC(bp); |
1813dd64 | 4405 | bp->b_ops = &xfs_sb_buf_ops; |
1da177e4 | 4406 | xfsbdstrat(log->l_mp, bp); |
1a1a3e97 | 4407 | error = xfs_buf_iowait(bp); |
d64e31a2 | 4408 | if (error) { |
901796af | 4409 | xfs_buf_ioerror_alert(bp, __func__); |
1da177e4 LT |
4410 | ASSERT(0); |
4411 | xfs_buf_relse(bp); | |
4412 | return error; | |
4413 | } | |
4414 | ||
4415 | /* Convert superblock from on-disk format */ | |
4416 | sbp = &log->l_mp->m_sb; | |
98021821 | 4417 | xfs_sb_from_disk(sbp, XFS_BUF_TO_SBP(bp)); |
1da177e4 | 4418 | ASSERT(sbp->sb_magicnum == XFS_SB_MAGIC); |
62118709 | 4419 | ASSERT(xfs_sb_good_version(sbp)); |
1da177e4 LT |
4420 | xfs_buf_relse(bp); |
4421 | ||
5478eead LM |
4422 | /* We've re-read the superblock so re-initialize per-cpu counters */ |
4423 | xfs_icsb_reinit_counters(log->l_mp); | |
4424 | ||
1da177e4 LT |
4425 | xlog_recover_check_summary(log); |
4426 | ||
4427 | /* Normal transactions can now occur */ | |
4428 | log->l_flags &= ~XLOG_ACTIVE_RECOVERY; | |
4429 | return 0; | |
4430 | } | |
4431 | ||
4432 | /* | |
4433 | * Perform recovery and re-initialize some log variables in xlog_find_tail. | |
4434 | * | |
4435 | * Return error or zero. | |
4436 | */ | |
4437 | int | |
4438 | xlog_recover( | |
9a8d2fdb | 4439 | struct xlog *log) |
1da177e4 LT |
4440 | { |
4441 | xfs_daddr_t head_blk, tail_blk; | |
4442 | int error; | |
4443 | ||
4444 | /* find the tail of the log */ | |
65be6054 | 4445 | if ((error = xlog_find_tail(log, &head_blk, &tail_blk))) |
1da177e4 LT |
4446 | return error; |
4447 | ||
4448 | if (tail_blk != head_blk) { | |
4449 | /* There used to be a comment here: | |
4450 | * | |
4451 | * disallow recovery on read-only mounts. note -- mount | |
4452 | * checks for ENOSPC and turns it into an intelligent | |
4453 | * error message. | |
4454 | * ...but this is no longer true. Now, unless you specify | |
4455 | * NORECOVERY (in which case this function would never be | |
4456 | * called), we just go ahead and recover. We do this all | |
4457 | * under the vfs layer, so we can get away with it unless | |
4458 | * the device itself is read-only, in which case we fail. | |
4459 | */ | |
3a02ee18 | 4460 | if ((error = xfs_dev_is_read_only(log->l_mp, "recovery"))) { |
1da177e4 LT |
4461 | return error; |
4462 | } | |
4463 | ||
e721f504 DC |
4464 | /* |
4465 | * Version 5 superblock log feature mask validation. We know the | |
4466 | * log is dirty so check if there are any unknown log features | |
4467 | * in what we need to recover. If there are unknown features | |
4468 | * (e.g. unsupported transactions, then simply reject the | |
4469 | * attempt at recovery before touching anything. | |
4470 | */ | |
4471 | if (XFS_SB_VERSION_NUM(&log->l_mp->m_sb) == XFS_SB_VERSION_5 && | |
4472 | xfs_sb_has_incompat_log_feature(&log->l_mp->m_sb, | |
4473 | XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)) { | |
4474 | xfs_warn(log->l_mp, | |
4475 | "Superblock has unknown incompatible log features (0x%x) enabled.\n" | |
4476 | "The log can not be fully and/or safely recovered by this kernel.\n" | |
4477 | "Please recover the log on a kernel that supports the unknown features.", | |
4478 | (log->l_mp->m_sb.sb_features_log_incompat & | |
4479 | XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)); | |
4480 | return EINVAL; | |
4481 | } | |
4482 | ||
a0fa2b67 DC |
4483 | xfs_notice(log->l_mp, "Starting recovery (logdev: %s)", |
4484 | log->l_mp->m_logname ? log->l_mp->m_logname | |
4485 | : "internal"); | |
1da177e4 LT |
4486 | |
4487 | error = xlog_do_recover(log, head_blk, tail_blk); | |
4488 | log->l_flags |= XLOG_RECOVERY_NEEDED; | |
4489 | } | |
4490 | return error; | |
4491 | } | |
4492 | ||
4493 | /* | |
4494 | * In the first part of recovery we replay inodes and buffers and build | |
4495 | * up the list of extent free items which need to be processed. Here | |
4496 | * we process the extent free items and clean up the on disk unlinked | |
4497 | * inode lists. This is separated from the first part of recovery so | |
4498 | * that the root and real-time bitmap inodes can be read in from disk in | |
4499 | * between the two stages. This is necessary so that we can free space | |
4500 | * in the real-time portion of the file system. | |
4501 | */ | |
4502 | int | |
4503 | xlog_recover_finish( | |
9a8d2fdb | 4504 | struct xlog *log) |
1da177e4 LT |
4505 | { |
4506 | /* | |
4507 | * Now we're ready to do the transactions needed for the | |
4508 | * rest of recovery. Start with completing all the extent | |
4509 | * free intent records and then process the unlinked inode | |
4510 | * lists. At this point, we essentially run in normal mode | |
4511 | * except that we're still performing recovery actions | |
4512 | * rather than accepting new requests. | |
4513 | */ | |
4514 | if (log->l_flags & XLOG_RECOVERY_NEEDED) { | |
3c1e2bbe DC |
4515 | int error; |
4516 | error = xlog_recover_process_efis(log); | |
4517 | if (error) { | |
a0fa2b67 | 4518 | xfs_alert(log->l_mp, "Failed to recover EFIs"); |
3c1e2bbe DC |
4519 | return error; |
4520 | } | |
1da177e4 LT |
4521 | /* |
4522 | * Sync the log to get all the EFIs out of the AIL. | |
4523 | * This isn't absolutely necessary, but it helps in | |
4524 | * case the unlink transactions would have problems | |
4525 | * pushing the EFIs out of the way. | |
4526 | */ | |
a14a348b | 4527 | xfs_log_force(log->l_mp, XFS_LOG_SYNC); |
1da177e4 | 4528 | |
4249023a | 4529 | xlog_recover_process_iunlinks(log); |
1da177e4 LT |
4530 | |
4531 | xlog_recover_check_summary(log); | |
4532 | ||
a0fa2b67 DC |
4533 | xfs_notice(log->l_mp, "Ending recovery (logdev: %s)", |
4534 | log->l_mp->m_logname ? log->l_mp->m_logname | |
4535 | : "internal"); | |
1da177e4 LT |
4536 | log->l_flags &= ~XLOG_RECOVERY_NEEDED; |
4537 | } else { | |
a0fa2b67 | 4538 | xfs_info(log->l_mp, "Ending clean mount"); |
1da177e4 LT |
4539 | } |
4540 | return 0; | |
4541 | } | |
4542 | ||
4543 | ||
4544 | #if defined(DEBUG) | |
4545 | /* | |
4546 | * Read all of the agf and agi counters and check that they | |
4547 | * are consistent with the superblock counters. | |
4548 | */ | |
4549 | void | |
4550 | xlog_recover_check_summary( | |
9a8d2fdb | 4551 | struct xlog *log) |
1da177e4 LT |
4552 | { |
4553 | xfs_mount_t *mp; | |
4554 | xfs_agf_t *agfp; | |
1da177e4 LT |
4555 | xfs_buf_t *agfbp; |
4556 | xfs_buf_t *agibp; | |
1da177e4 LT |
4557 | xfs_agnumber_t agno; |
4558 | __uint64_t freeblks; | |
4559 | __uint64_t itotal; | |
4560 | __uint64_t ifree; | |
5e1be0fb | 4561 | int error; |
1da177e4 LT |
4562 | |
4563 | mp = log->l_mp; | |
4564 | ||
4565 | freeblks = 0LL; | |
4566 | itotal = 0LL; | |
4567 | ifree = 0LL; | |
4568 | for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) { | |
4805621a CH |
4569 | error = xfs_read_agf(mp, NULL, agno, 0, &agfbp); |
4570 | if (error) { | |
a0fa2b67 DC |
4571 | xfs_alert(mp, "%s agf read failed agno %d error %d", |
4572 | __func__, agno, error); | |
4805621a CH |
4573 | } else { |
4574 | agfp = XFS_BUF_TO_AGF(agfbp); | |
4575 | freeblks += be32_to_cpu(agfp->agf_freeblks) + | |
4576 | be32_to_cpu(agfp->agf_flcount); | |
4577 | xfs_buf_relse(agfbp); | |
1da177e4 | 4578 | } |
1da177e4 | 4579 | |
5e1be0fb | 4580 | error = xfs_read_agi(mp, NULL, agno, &agibp); |
a0fa2b67 DC |
4581 | if (error) { |
4582 | xfs_alert(mp, "%s agi read failed agno %d error %d", | |
4583 | __func__, agno, error); | |
4584 | } else { | |
5e1be0fb | 4585 | struct xfs_agi *agi = XFS_BUF_TO_AGI(agibp); |
16259e7d | 4586 | |
5e1be0fb CH |
4587 | itotal += be32_to_cpu(agi->agi_count); |
4588 | ifree += be32_to_cpu(agi->agi_freecount); | |
4589 | xfs_buf_relse(agibp); | |
4590 | } | |
1da177e4 | 4591 | } |
1da177e4 LT |
4592 | } |
4593 | #endif /* DEBUG */ |