Commit | Line | Data |
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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 | 30 | #include "xfs_inode.h" |
239880ef | 31 | #include "xfs_trans.h" |
239880ef | 32 | #include "xfs_log.h" |
1da177e4 | 33 | #include "xfs_log_priv.h" |
1da177e4 | 34 | #include "xfs_log_recover.h" |
a4fbe6ab | 35 | #include "xfs_inode_item.h" |
1da177e4 LT |
36 | #include "xfs_extfree_item.h" |
37 | #include "xfs_trans_priv.h" | |
a4fbe6ab DC |
38 | #include "xfs_alloc.h" |
39 | #include "xfs_ialloc.h" | |
1da177e4 | 40 | #include "xfs_quota.h" |
0e446be4 | 41 | #include "xfs_cksum.h" |
0b1b213f | 42 | #include "xfs_trace.h" |
33479e05 | 43 | #include "xfs_icache.h" |
a4fbe6ab DC |
44 | #include "xfs_bmap_btree.h" |
45 | #include "xfs_dinode.h" | |
46 | #include "xfs_error.h" | |
2b9ab5ab | 47 | #include "xfs_dir2.h" |
1da177e4 | 48 | |
fc06c6d0 DC |
49 | #define BLK_AVG(blk1, blk2) ((blk1+blk2) >> 1) |
50 | ||
9a8d2fdb MT |
51 | STATIC int |
52 | xlog_find_zeroed( | |
53 | struct xlog *, | |
54 | xfs_daddr_t *); | |
55 | STATIC int | |
56 | xlog_clear_stale_blocks( | |
57 | struct xlog *, | |
58 | xfs_lsn_t); | |
1da177e4 | 59 | #if defined(DEBUG) |
9a8d2fdb MT |
60 | STATIC void |
61 | xlog_recover_check_summary( | |
62 | struct xlog *); | |
1da177e4 LT |
63 | #else |
64 | #define xlog_recover_check_summary(log) | |
1da177e4 LT |
65 | #endif |
66 | ||
d5689eaa CH |
67 | /* |
68 | * This structure is used during recovery to record the buf log items which | |
69 | * have been canceled and should not be replayed. | |
70 | */ | |
71 | struct xfs_buf_cancel { | |
72 | xfs_daddr_t bc_blkno; | |
73 | uint bc_len; | |
74 | int bc_refcount; | |
75 | struct list_head bc_list; | |
76 | }; | |
77 | ||
1da177e4 LT |
78 | /* |
79 | * Sector aligned buffer routines for buffer create/read/write/access | |
80 | */ | |
81 | ||
ff30a622 AE |
82 | /* |
83 | * Verify the given count of basic blocks is valid number of blocks | |
84 | * to specify for an operation involving the given XFS log buffer. | |
85 | * Returns nonzero if the count is valid, 0 otherwise. | |
86 | */ | |
87 | ||
88 | static inline int | |
89 | xlog_buf_bbcount_valid( | |
9a8d2fdb | 90 | struct xlog *log, |
ff30a622 AE |
91 | int bbcount) |
92 | { | |
93 | return bbcount > 0 && bbcount <= log->l_logBBsize; | |
94 | } | |
95 | ||
36adecff AE |
96 | /* |
97 | * Allocate a buffer to hold log data. The buffer needs to be able | |
98 | * to map to a range of nbblks basic blocks at any valid (basic | |
99 | * block) offset within the log. | |
100 | */ | |
5d77c0dc | 101 | STATIC xfs_buf_t * |
1da177e4 | 102 | xlog_get_bp( |
9a8d2fdb | 103 | struct xlog *log, |
3228149c | 104 | int nbblks) |
1da177e4 | 105 | { |
c8da0faf CH |
106 | struct xfs_buf *bp; |
107 | ||
ff30a622 | 108 | if (!xlog_buf_bbcount_valid(log, nbblks)) { |
a0fa2b67 | 109 | xfs_warn(log->l_mp, "Invalid block length (0x%x) for buffer", |
ff30a622 AE |
110 | nbblks); |
111 | XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp); | |
3228149c DC |
112 | return NULL; |
113 | } | |
1da177e4 | 114 | |
36adecff AE |
115 | /* |
116 | * We do log I/O in units of log sectors (a power-of-2 | |
117 | * multiple of the basic block size), so we round up the | |
25985edc | 118 | * requested size to accommodate the basic blocks required |
36adecff AE |
119 | * for complete log sectors. |
120 | * | |
121 | * In addition, the buffer may be used for a non-sector- | |
122 | * aligned block offset, in which case an I/O of the | |
123 | * requested size could extend beyond the end of the | |
124 | * buffer. If the requested size is only 1 basic block it | |
125 | * will never straddle a sector boundary, so this won't be | |
126 | * an issue. Nor will this be a problem if the log I/O is | |
127 | * done in basic blocks (sector size 1). But otherwise we | |
128 | * extend the buffer by one extra log sector to ensure | |
25985edc | 129 | * there's space to accommodate this possibility. |
36adecff | 130 | */ |
69ce58f0 AE |
131 | if (nbblks > 1 && log->l_sectBBsize > 1) |
132 | nbblks += log->l_sectBBsize; | |
133 | nbblks = round_up(nbblks, log->l_sectBBsize); | |
36adecff | 134 | |
e70b73f8 | 135 | bp = xfs_buf_get_uncached(log->l_mp->m_logdev_targp, nbblks, 0); |
c8da0faf CH |
136 | if (bp) |
137 | xfs_buf_unlock(bp); | |
138 | return bp; | |
1da177e4 LT |
139 | } |
140 | ||
5d77c0dc | 141 | STATIC void |
1da177e4 LT |
142 | xlog_put_bp( |
143 | xfs_buf_t *bp) | |
144 | { | |
145 | xfs_buf_free(bp); | |
146 | } | |
147 | ||
48389ef1 AE |
148 | /* |
149 | * Return the address of the start of the given block number's data | |
150 | * in a log buffer. The buffer covers a log sector-aligned region. | |
151 | */ | |
076e6acb CH |
152 | STATIC xfs_caddr_t |
153 | xlog_align( | |
9a8d2fdb | 154 | struct xlog *log, |
076e6acb CH |
155 | xfs_daddr_t blk_no, |
156 | int nbblks, | |
9a8d2fdb | 157 | struct xfs_buf *bp) |
076e6acb | 158 | { |
fdc07f44 | 159 | xfs_daddr_t offset = blk_no & ((xfs_daddr_t)log->l_sectBBsize - 1); |
076e6acb | 160 | |
4e94b71b | 161 | ASSERT(offset + nbblks <= bp->b_length); |
62926044 | 162 | return bp->b_addr + BBTOB(offset); |
076e6acb CH |
163 | } |
164 | ||
1da177e4 LT |
165 | |
166 | /* | |
167 | * nbblks should be uint, but oh well. Just want to catch that 32-bit length. | |
168 | */ | |
076e6acb CH |
169 | STATIC int |
170 | xlog_bread_noalign( | |
9a8d2fdb | 171 | struct xlog *log, |
1da177e4 LT |
172 | xfs_daddr_t blk_no, |
173 | int nbblks, | |
9a8d2fdb | 174 | struct xfs_buf *bp) |
1da177e4 LT |
175 | { |
176 | int error; | |
177 | ||
ff30a622 | 178 | if (!xlog_buf_bbcount_valid(log, nbblks)) { |
a0fa2b67 | 179 | xfs_warn(log->l_mp, "Invalid block length (0x%x) for buffer", |
ff30a622 AE |
180 | nbblks); |
181 | XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp); | |
3228149c DC |
182 | return EFSCORRUPTED; |
183 | } | |
184 | ||
69ce58f0 AE |
185 | blk_no = round_down(blk_no, log->l_sectBBsize); |
186 | nbblks = round_up(nbblks, log->l_sectBBsize); | |
1da177e4 LT |
187 | |
188 | ASSERT(nbblks > 0); | |
4e94b71b | 189 | ASSERT(nbblks <= bp->b_length); |
1da177e4 LT |
190 | |
191 | XFS_BUF_SET_ADDR(bp, log->l_logBBstart + blk_no); | |
192 | XFS_BUF_READ(bp); | |
aa0e8833 | 193 | bp->b_io_length = nbblks; |
0e95f19a | 194 | bp->b_error = 0; |
1da177e4 LT |
195 | |
196 | xfsbdstrat(log->l_mp, bp); | |
1a1a3e97 | 197 | error = xfs_buf_iowait(bp); |
d64e31a2 | 198 | if (error) |
901796af | 199 | xfs_buf_ioerror_alert(bp, __func__); |
1da177e4 LT |
200 | return error; |
201 | } | |
202 | ||
076e6acb CH |
203 | STATIC int |
204 | xlog_bread( | |
9a8d2fdb | 205 | struct xlog *log, |
076e6acb CH |
206 | xfs_daddr_t blk_no, |
207 | int nbblks, | |
9a8d2fdb | 208 | struct xfs_buf *bp, |
076e6acb CH |
209 | xfs_caddr_t *offset) |
210 | { | |
211 | int error; | |
212 | ||
213 | error = xlog_bread_noalign(log, blk_no, nbblks, bp); | |
214 | if (error) | |
215 | return error; | |
216 | ||
217 | *offset = xlog_align(log, blk_no, nbblks, bp); | |
218 | return 0; | |
219 | } | |
220 | ||
44396476 DC |
221 | /* |
222 | * Read at an offset into the buffer. Returns with the buffer in it's original | |
223 | * state regardless of the result of the read. | |
224 | */ | |
225 | STATIC int | |
226 | xlog_bread_offset( | |
9a8d2fdb | 227 | struct xlog *log, |
44396476 DC |
228 | xfs_daddr_t blk_no, /* block to read from */ |
229 | int nbblks, /* blocks to read */ | |
9a8d2fdb | 230 | struct xfs_buf *bp, |
44396476 DC |
231 | xfs_caddr_t offset) |
232 | { | |
62926044 | 233 | xfs_caddr_t orig_offset = bp->b_addr; |
4e94b71b | 234 | int orig_len = BBTOB(bp->b_length); |
44396476 DC |
235 | int error, error2; |
236 | ||
02fe03d9 | 237 | error = xfs_buf_associate_memory(bp, offset, BBTOB(nbblks)); |
44396476 DC |
238 | if (error) |
239 | return error; | |
240 | ||
241 | error = xlog_bread_noalign(log, blk_no, nbblks, bp); | |
242 | ||
243 | /* must reset buffer pointer even on error */ | |
02fe03d9 | 244 | error2 = xfs_buf_associate_memory(bp, orig_offset, orig_len); |
44396476 DC |
245 | if (error) |
246 | return error; | |
247 | return error2; | |
248 | } | |
249 | ||
1da177e4 LT |
250 | /* |
251 | * Write out the buffer at the given block for the given number of blocks. | |
252 | * The buffer is kept locked across the write and is returned locked. | |
253 | * This can only be used for synchronous log writes. | |
254 | */ | |
ba0f32d4 | 255 | STATIC int |
1da177e4 | 256 | xlog_bwrite( |
9a8d2fdb | 257 | struct xlog *log, |
1da177e4 LT |
258 | xfs_daddr_t blk_no, |
259 | int nbblks, | |
9a8d2fdb | 260 | struct xfs_buf *bp) |
1da177e4 LT |
261 | { |
262 | int error; | |
263 | ||
ff30a622 | 264 | if (!xlog_buf_bbcount_valid(log, nbblks)) { |
a0fa2b67 | 265 | xfs_warn(log->l_mp, "Invalid block length (0x%x) for buffer", |
ff30a622 AE |
266 | nbblks); |
267 | XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp); | |
3228149c DC |
268 | return EFSCORRUPTED; |
269 | } | |
270 | ||
69ce58f0 AE |
271 | blk_no = round_down(blk_no, log->l_sectBBsize); |
272 | nbblks = round_up(nbblks, log->l_sectBBsize); | |
1da177e4 LT |
273 | |
274 | ASSERT(nbblks > 0); | |
4e94b71b | 275 | ASSERT(nbblks <= bp->b_length); |
1da177e4 LT |
276 | |
277 | XFS_BUF_SET_ADDR(bp, log->l_logBBstart + blk_no); | |
278 | XFS_BUF_ZEROFLAGS(bp); | |
72790aa1 | 279 | xfs_buf_hold(bp); |
0c842ad4 | 280 | xfs_buf_lock(bp); |
aa0e8833 | 281 | bp->b_io_length = nbblks; |
0e95f19a | 282 | bp->b_error = 0; |
1da177e4 | 283 | |
c2b006c1 | 284 | error = xfs_bwrite(bp); |
901796af CH |
285 | if (error) |
286 | xfs_buf_ioerror_alert(bp, __func__); | |
c2b006c1 | 287 | xfs_buf_relse(bp); |
1da177e4 LT |
288 | return error; |
289 | } | |
290 | ||
1da177e4 LT |
291 | #ifdef DEBUG |
292 | /* | |
293 | * dump debug superblock and log record information | |
294 | */ | |
295 | STATIC void | |
296 | xlog_header_check_dump( | |
297 | xfs_mount_t *mp, | |
298 | xlog_rec_header_t *head) | |
299 | { | |
08e96e1a | 300 | xfs_debug(mp, "%s: SB : uuid = %pU, fmt = %d", |
03daa57c | 301 | __func__, &mp->m_sb.sb_uuid, XLOG_FMT); |
08e96e1a | 302 | xfs_debug(mp, " log : uuid = %pU, fmt = %d", |
03daa57c | 303 | &head->h_fs_uuid, be32_to_cpu(head->h_fmt)); |
1da177e4 LT |
304 | } |
305 | #else | |
306 | #define xlog_header_check_dump(mp, head) | |
307 | #endif | |
308 | ||
309 | /* | |
310 | * check log record header for recovery | |
311 | */ | |
312 | STATIC int | |
313 | xlog_header_check_recover( | |
314 | xfs_mount_t *mp, | |
315 | xlog_rec_header_t *head) | |
316 | { | |
69ef921b | 317 | ASSERT(head->h_magicno == cpu_to_be32(XLOG_HEADER_MAGIC_NUM)); |
1da177e4 LT |
318 | |
319 | /* | |
320 | * IRIX doesn't write the h_fmt field and leaves it zeroed | |
321 | * (XLOG_FMT_UNKNOWN). This stops us from trying to recover | |
322 | * a dirty log created in IRIX. | |
323 | */ | |
69ef921b | 324 | if (unlikely(head->h_fmt != cpu_to_be32(XLOG_FMT))) { |
a0fa2b67 DC |
325 | xfs_warn(mp, |
326 | "dirty log written in incompatible format - can't recover"); | |
1da177e4 LT |
327 | xlog_header_check_dump(mp, head); |
328 | XFS_ERROR_REPORT("xlog_header_check_recover(1)", | |
329 | XFS_ERRLEVEL_HIGH, mp); | |
330 | return XFS_ERROR(EFSCORRUPTED); | |
331 | } else if (unlikely(!uuid_equal(&mp->m_sb.sb_uuid, &head->h_fs_uuid))) { | |
a0fa2b67 DC |
332 | xfs_warn(mp, |
333 | "dirty log entry has mismatched uuid - can't recover"); | |
1da177e4 LT |
334 | xlog_header_check_dump(mp, head); |
335 | XFS_ERROR_REPORT("xlog_header_check_recover(2)", | |
336 | XFS_ERRLEVEL_HIGH, mp); | |
337 | return XFS_ERROR(EFSCORRUPTED); | |
338 | } | |
339 | return 0; | |
340 | } | |
341 | ||
342 | /* | |
343 | * read the head block of the log and check the header | |
344 | */ | |
345 | STATIC int | |
346 | xlog_header_check_mount( | |
347 | xfs_mount_t *mp, | |
348 | xlog_rec_header_t *head) | |
349 | { | |
69ef921b | 350 | ASSERT(head->h_magicno == cpu_to_be32(XLOG_HEADER_MAGIC_NUM)); |
1da177e4 LT |
351 | |
352 | if (uuid_is_nil(&head->h_fs_uuid)) { | |
353 | /* | |
354 | * IRIX doesn't write the h_fs_uuid or h_fmt fields. If | |
355 | * h_fs_uuid is nil, we assume this log was last mounted | |
356 | * by IRIX and continue. | |
357 | */ | |
a0fa2b67 | 358 | xfs_warn(mp, "nil uuid in log - IRIX style log"); |
1da177e4 | 359 | } else if (unlikely(!uuid_equal(&mp->m_sb.sb_uuid, &head->h_fs_uuid))) { |
a0fa2b67 | 360 | xfs_warn(mp, "log has mismatched uuid - can't recover"); |
1da177e4 LT |
361 | xlog_header_check_dump(mp, head); |
362 | XFS_ERROR_REPORT("xlog_header_check_mount", | |
363 | XFS_ERRLEVEL_HIGH, mp); | |
364 | return XFS_ERROR(EFSCORRUPTED); | |
365 | } | |
366 | return 0; | |
367 | } | |
368 | ||
369 | STATIC void | |
370 | xlog_recover_iodone( | |
371 | struct xfs_buf *bp) | |
372 | { | |
5a52c2a5 | 373 | if (bp->b_error) { |
1da177e4 LT |
374 | /* |
375 | * We're not going to bother about retrying | |
376 | * this during recovery. One strike! | |
377 | */ | |
901796af | 378 | xfs_buf_ioerror_alert(bp, __func__); |
ebad861b DC |
379 | xfs_force_shutdown(bp->b_target->bt_mount, |
380 | SHUTDOWN_META_IO_ERROR); | |
1da177e4 | 381 | } |
cb669ca5 | 382 | bp->b_iodone = NULL; |
1a1a3e97 | 383 | xfs_buf_ioend(bp, 0); |
1da177e4 LT |
384 | } |
385 | ||
386 | /* | |
387 | * This routine finds (to an approximation) the first block in the physical | |
388 | * log which contains the given cycle. It uses a binary search algorithm. | |
389 | * Note that the algorithm can not be perfect because the disk will not | |
390 | * necessarily be perfect. | |
391 | */ | |
a8272ce0 | 392 | STATIC int |
1da177e4 | 393 | xlog_find_cycle_start( |
9a8d2fdb MT |
394 | struct xlog *log, |
395 | struct xfs_buf *bp, | |
1da177e4 LT |
396 | xfs_daddr_t first_blk, |
397 | xfs_daddr_t *last_blk, | |
398 | uint cycle) | |
399 | { | |
400 | xfs_caddr_t offset; | |
401 | xfs_daddr_t mid_blk; | |
e3bb2e30 | 402 | xfs_daddr_t end_blk; |
1da177e4 LT |
403 | uint mid_cycle; |
404 | int error; | |
405 | ||
e3bb2e30 AE |
406 | end_blk = *last_blk; |
407 | mid_blk = BLK_AVG(first_blk, end_blk); | |
408 | while (mid_blk != first_blk && mid_blk != end_blk) { | |
076e6acb CH |
409 | error = xlog_bread(log, mid_blk, 1, bp, &offset); |
410 | if (error) | |
1da177e4 | 411 | return error; |
03bea6fe | 412 | mid_cycle = xlog_get_cycle(offset); |
e3bb2e30 AE |
413 | if (mid_cycle == cycle) |
414 | end_blk = mid_blk; /* last_half_cycle == mid_cycle */ | |
415 | else | |
416 | first_blk = mid_blk; /* first_half_cycle == mid_cycle */ | |
417 | mid_blk = BLK_AVG(first_blk, end_blk); | |
1da177e4 | 418 | } |
e3bb2e30 AE |
419 | ASSERT((mid_blk == first_blk && mid_blk+1 == end_blk) || |
420 | (mid_blk == end_blk && mid_blk-1 == first_blk)); | |
421 | ||
422 | *last_blk = end_blk; | |
1da177e4 LT |
423 | |
424 | return 0; | |
425 | } | |
426 | ||
427 | /* | |
3f943d85 AE |
428 | * Check that a range of blocks does not contain stop_on_cycle_no. |
429 | * Fill in *new_blk with the block offset where such a block is | |
430 | * found, or with -1 (an invalid block number) if there is no such | |
431 | * block in the range. The scan needs to occur from front to back | |
432 | * and the pointer into the region must be updated since a later | |
433 | * routine will need to perform another test. | |
1da177e4 LT |
434 | */ |
435 | STATIC int | |
436 | xlog_find_verify_cycle( | |
9a8d2fdb | 437 | struct xlog *log, |
1da177e4 LT |
438 | xfs_daddr_t start_blk, |
439 | int nbblks, | |
440 | uint stop_on_cycle_no, | |
441 | xfs_daddr_t *new_blk) | |
442 | { | |
443 | xfs_daddr_t i, j; | |
444 | uint cycle; | |
445 | xfs_buf_t *bp; | |
446 | xfs_daddr_t bufblks; | |
447 | xfs_caddr_t buf = NULL; | |
448 | int error = 0; | |
449 | ||
6881a229 AE |
450 | /* |
451 | * Greedily allocate a buffer big enough to handle the full | |
452 | * range of basic blocks we'll be examining. If that fails, | |
453 | * try a smaller size. We need to be able to read at least | |
454 | * a log sector, or we're out of luck. | |
455 | */ | |
1da177e4 | 456 | bufblks = 1 << ffs(nbblks); |
81158e0c DC |
457 | while (bufblks > log->l_logBBsize) |
458 | bufblks >>= 1; | |
1da177e4 | 459 | while (!(bp = xlog_get_bp(log, bufblks))) { |
1da177e4 | 460 | bufblks >>= 1; |
69ce58f0 | 461 | if (bufblks < log->l_sectBBsize) |
1da177e4 LT |
462 | return ENOMEM; |
463 | } | |
464 | ||
465 | for (i = start_blk; i < start_blk + nbblks; i += bufblks) { | |
466 | int bcount; | |
467 | ||
468 | bcount = min(bufblks, (start_blk + nbblks - i)); | |
469 | ||
076e6acb CH |
470 | error = xlog_bread(log, i, bcount, bp, &buf); |
471 | if (error) | |
1da177e4 LT |
472 | goto out; |
473 | ||
1da177e4 | 474 | for (j = 0; j < bcount; j++) { |
03bea6fe | 475 | cycle = xlog_get_cycle(buf); |
1da177e4 LT |
476 | if (cycle == stop_on_cycle_no) { |
477 | *new_blk = i+j; | |
478 | goto out; | |
479 | } | |
480 | ||
481 | buf += BBSIZE; | |
482 | } | |
483 | } | |
484 | ||
485 | *new_blk = -1; | |
486 | ||
487 | out: | |
488 | xlog_put_bp(bp); | |
489 | return error; | |
490 | } | |
491 | ||
492 | /* | |
493 | * Potentially backup over partial log record write. | |
494 | * | |
495 | * In the typical case, last_blk is the number of the block directly after | |
496 | * a good log record. Therefore, we subtract one to get the block number | |
497 | * of the last block in the given buffer. extra_bblks contains the number | |
498 | * of blocks we would have read on a previous read. This happens when the | |
499 | * last log record is split over the end of the physical log. | |
500 | * | |
501 | * extra_bblks is the number of blocks potentially verified on a previous | |
502 | * call to this routine. | |
503 | */ | |
504 | STATIC int | |
505 | xlog_find_verify_log_record( | |
9a8d2fdb | 506 | struct xlog *log, |
1da177e4 LT |
507 | xfs_daddr_t start_blk, |
508 | xfs_daddr_t *last_blk, | |
509 | int extra_bblks) | |
510 | { | |
511 | xfs_daddr_t i; | |
512 | xfs_buf_t *bp; | |
513 | xfs_caddr_t offset = NULL; | |
514 | xlog_rec_header_t *head = NULL; | |
515 | int error = 0; | |
516 | int smallmem = 0; | |
517 | int num_blks = *last_blk - start_blk; | |
518 | int xhdrs; | |
519 | ||
520 | ASSERT(start_blk != 0 || *last_blk != start_blk); | |
521 | ||
522 | if (!(bp = xlog_get_bp(log, num_blks))) { | |
523 | if (!(bp = xlog_get_bp(log, 1))) | |
524 | return ENOMEM; | |
525 | smallmem = 1; | |
526 | } else { | |
076e6acb CH |
527 | error = xlog_bread(log, start_blk, num_blks, bp, &offset); |
528 | if (error) | |
1da177e4 | 529 | goto out; |
1da177e4 LT |
530 | offset += ((num_blks - 1) << BBSHIFT); |
531 | } | |
532 | ||
533 | for (i = (*last_blk) - 1; i >= 0; i--) { | |
534 | if (i < start_blk) { | |
535 | /* valid log record not found */ | |
a0fa2b67 DC |
536 | xfs_warn(log->l_mp, |
537 | "Log inconsistent (didn't find previous header)"); | |
1da177e4 LT |
538 | ASSERT(0); |
539 | error = XFS_ERROR(EIO); | |
540 | goto out; | |
541 | } | |
542 | ||
543 | if (smallmem) { | |
076e6acb CH |
544 | error = xlog_bread(log, i, 1, bp, &offset); |
545 | if (error) | |
1da177e4 | 546 | goto out; |
1da177e4 LT |
547 | } |
548 | ||
549 | head = (xlog_rec_header_t *)offset; | |
550 | ||
69ef921b | 551 | if (head->h_magicno == cpu_to_be32(XLOG_HEADER_MAGIC_NUM)) |
1da177e4 LT |
552 | break; |
553 | ||
554 | if (!smallmem) | |
555 | offset -= BBSIZE; | |
556 | } | |
557 | ||
558 | /* | |
559 | * We hit the beginning of the physical log & still no header. Return | |
560 | * to caller. If caller can handle a return of -1, then this routine | |
561 | * will be called again for the end of the physical log. | |
562 | */ | |
563 | if (i == -1) { | |
564 | error = -1; | |
565 | goto out; | |
566 | } | |
567 | ||
568 | /* | |
569 | * We have the final block of the good log (the first block | |
570 | * of the log record _before_ the head. So we check the uuid. | |
571 | */ | |
572 | if ((error = xlog_header_check_mount(log->l_mp, head))) | |
573 | goto out; | |
574 | ||
575 | /* | |
576 | * We may have found a log record header before we expected one. | |
577 | * last_blk will be the 1st block # with a given cycle #. We may end | |
578 | * up reading an entire log record. In this case, we don't want to | |
579 | * reset last_blk. Only when last_blk points in the middle of a log | |
580 | * record do we update last_blk. | |
581 | */ | |
62118709 | 582 | if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { |
b53e675d | 583 | uint h_size = be32_to_cpu(head->h_size); |
1da177e4 LT |
584 | |
585 | xhdrs = h_size / XLOG_HEADER_CYCLE_SIZE; | |
586 | if (h_size % XLOG_HEADER_CYCLE_SIZE) | |
587 | xhdrs++; | |
588 | } else { | |
589 | xhdrs = 1; | |
590 | } | |
591 | ||
b53e675d CH |
592 | if (*last_blk - i + extra_bblks != |
593 | BTOBB(be32_to_cpu(head->h_len)) + xhdrs) | |
1da177e4 LT |
594 | *last_blk = i; |
595 | ||
596 | out: | |
597 | xlog_put_bp(bp); | |
598 | return error; | |
599 | } | |
600 | ||
601 | /* | |
602 | * Head is defined to be the point of the log where the next log write | |
0a94da24 | 603 | * could go. This means that incomplete LR writes at the end are |
1da177e4 LT |
604 | * eliminated when calculating the head. We aren't guaranteed that previous |
605 | * LR have complete transactions. We only know that a cycle number of | |
606 | * current cycle number -1 won't be present in the log if we start writing | |
607 | * from our current block number. | |
608 | * | |
609 | * last_blk contains the block number of the first block with a given | |
610 | * cycle number. | |
611 | * | |
612 | * Return: zero if normal, non-zero if error. | |
613 | */ | |
ba0f32d4 | 614 | STATIC int |
1da177e4 | 615 | xlog_find_head( |
9a8d2fdb | 616 | struct xlog *log, |
1da177e4 LT |
617 | xfs_daddr_t *return_head_blk) |
618 | { | |
619 | xfs_buf_t *bp; | |
620 | xfs_caddr_t offset; | |
621 | xfs_daddr_t new_blk, first_blk, start_blk, last_blk, head_blk; | |
622 | int num_scan_bblks; | |
623 | uint first_half_cycle, last_half_cycle; | |
624 | uint stop_on_cycle; | |
625 | int error, log_bbnum = log->l_logBBsize; | |
626 | ||
627 | /* Is the end of the log device zeroed? */ | |
628 | if ((error = xlog_find_zeroed(log, &first_blk)) == -1) { | |
629 | *return_head_blk = first_blk; | |
630 | ||
631 | /* Is the whole lot zeroed? */ | |
632 | if (!first_blk) { | |
633 | /* Linux XFS shouldn't generate totally zeroed logs - | |
634 | * mkfs etc write a dummy unmount record to a fresh | |
635 | * log so we can store the uuid in there | |
636 | */ | |
a0fa2b67 | 637 | xfs_warn(log->l_mp, "totally zeroed log"); |
1da177e4 LT |
638 | } |
639 | ||
640 | return 0; | |
641 | } else if (error) { | |
a0fa2b67 | 642 | xfs_warn(log->l_mp, "empty log check failed"); |
1da177e4 LT |
643 | return error; |
644 | } | |
645 | ||
646 | first_blk = 0; /* get cycle # of 1st block */ | |
647 | bp = xlog_get_bp(log, 1); | |
648 | if (!bp) | |
649 | return ENOMEM; | |
076e6acb CH |
650 | |
651 | error = xlog_bread(log, 0, 1, bp, &offset); | |
652 | if (error) | |
1da177e4 | 653 | goto bp_err; |
076e6acb | 654 | |
03bea6fe | 655 | first_half_cycle = xlog_get_cycle(offset); |
1da177e4 LT |
656 | |
657 | last_blk = head_blk = log_bbnum - 1; /* get cycle # of last block */ | |
076e6acb CH |
658 | error = xlog_bread(log, last_blk, 1, bp, &offset); |
659 | if (error) | |
1da177e4 | 660 | goto bp_err; |
076e6acb | 661 | |
03bea6fe | 662 | last_half_cycle = xlog_get_cycle(offset); |
1da177e4 LT |
663 | ASSERT(last_half_cycle != 0); |
664 | ||
665 | /* | |
666 | * If the 1st half cycle number is equal to the last half cycle number, | |
667 | * then the entire log is stamped with the same cycle number. In this | |
668 | * case, head_blk can't be set to zero (which makes sense). The below | |
669 | * math doesn't work out properly with head_blk equal to zero. Instead, | |
670 | * we set it to log_bbnum which is an invalid block number, but this | |
671 | * value makes the math correct. If head_blk doesn't changed through | |
672 | * all the tests below, *head_blk is set to zero at the very end rather | |
673 | * than log_bbnum. In a sense, log_bbnum and zero are the same block | |
674 | * in a circular file. | |
675 | */ | |
676 | if (first_half_cycle == last_half_cycle) { | |
677 | /* | |
678 | * In this case we believe that the entire log should have | |
679 | * cycle number last_half_cycle. We need to scan backwards | |
680 | * from the end verifying that there are no holes still | |
681 | * containing last_half_cycle - 1. If we find such a hole, | |
682 | * then the start of that hole will be the new head. The | |
683 | * simple case looks like | |
684 | * x | x ... | x - 1 | x | |
685 | * Another case that fits this picture would be | |
686 | * x | x + 1 | x ... | x | |
c41564b5 | 687 | * In this case the head really is somewhere at the end of the |
1da177e4 LT |
688 | * log, as one of the latest writes at the beginning was |
689 | * incomplete. | |
690 | * One more case is | |
691 | * x | x + 1 | x ... | x - 1 | x | |
692 | * This is really the combination of the above two cases, and | |
693 | * the head has to end up at the start of the x-1 hole at the | |
694 | * end of the log. | |
695 | * | |
696 | * In the 256k log case, we will read from the beginning to the | |
697 | * end of the log and search for cycle numbers equal to x-1. | |
698 | * We don't worry about the x+1 blocks that we encounter, | |
699 | * because we know that they cannot be the head since the log | |
700 | * started with x. | |
701 | */ | |
702 | head_blk = log_bbnum; | |
703 | stop_on_cycle = last_half_cycle - 1; | |
704 | } else { | |
705 | /* | |
706 | * In this case we want to find the first block with cycle | |
707 | * number matching last_half_cycle. We expect the log to be | |
708 | * some variation on | |
3f943d85 | 709 | * x + 1 ... | x ... | x |
1da177e4 LT |
710 | * The first block with cycle number x (last_half_cycle) will |
711 | * be where the new head belongs. First we do a binary search | |
712 | * for the first occurrence of last_half_cycle. The binary | |
713 | * search may not be totally accurate, so then we scan back | |
714 | * from there looking for occurrences of last_half_cycle before | |
715 | * us. If that backwards scan wraps around the beginning of | |
716 | * the log, then we look for occurrences of last_half_cycle - 1 | |
717 | * at the end of the log. The cases we're looking for look | |
718 | * like | |
3f943d85 AE |
719 | * v binary search stopped here |
720 | * x + 1 ... | x | x + 1 | x ... | x | |
721 | * ^ but we want to locate this spot | |
1da177e4 | 722 | * or |
1da177e4 | 723 | * <---------> less than scan distance |
3f943d85 AE |
724 | * x + 1 ... | x ... | x - 1 | x |
725 | * ^ we want to locate this spot | |
1da177e4 LT |
726 | */ |
727 | stop_on_cycle = last_half_cycle; | |
728 | if ((error = xlog_find_cycle_start(log, bp, first_blk, | |
729 | &head_blk, last_half_cycle))) | |
730 | goto bp_err; | |
731 | } | |
732 | ||
733 | /* | |
734 | * Now validate the answer. Scan back some number of maximum possible | |
735 | * blocks and make sure each one has the expected cycle number. The | |
736 | * maximum is determined by the total possible amount of buffering | |
737 | * in the in-core log. The following number can be made tighter if | |
738 | * we actually look at the block size of the filesystem. | |
739 | */ | |
740 | num_scan_bblks = XLOG_TOTAL_REC_SHIFT(log); | |
741 | if (head_blk >= num_scan_bblks) { | |
742 | /* | |
743 | * We are guaranteed that the entire check can be performed | |
744 | * in one buffer. | |
745 | */ | |
746 | start_blk = head_blk - num_scan_bblks; | |
747 | if ((error = xlog_find_verify_cycle(log, | |
748 | start_blk, num_scan_bblks, | |
749 | stop_on_cycle, &new_blk))) | |
750 | goto bp_err; | |
751 | if (new_blk != -1) | |
752 | head_blk = new_blk; | |
753 | } else { /* need to read 2 parts of log */ | |
754 | /* | |
755 | * We are going to scan backwards in the log in two parts. | |
756 | * First we scan the physical end of the log. In this part | |
757 | * of the log, we are looking for blocks with cycle number | |
758 | * last_half_cycle - 1. | |
759 | * If we find one, then we know that the log starts there, as | |
760 | * we've found a hole that didn't get written in going around | |
761 | * the end of the physical log. The simple case for this is | |
762 | * x + 1 ... | x ... | x - 1 | x | |
763 | * <---------> less than scan distance | |
764 | * If all of the blocks at the end of the log have cycle number | |
765 | * last_half_cycle, then we check the blocks at the start of | |
766 | * the log looking for occurrences of last_half_cycle. If we | |
767 | * find one, then our current estimate for the location of the | |
768 | * first occurrence of last_half_cycle is wrong and we move | |
769 | * back to the hole we've found. This case looks like | |
770 | * x + 1 ... | x | x + 1 | x ... | |
771 | * ^ binary search stopped here | |
772 | * Another case we need to handle that only occurs in 256k | |
773 | * logs is | |
774 | * x + 1 ... | x ... | x+1 | x ... | |
775 | * ^ binary search stops here | |
776 | * In a 256k log, the scan at the end of the log will see the | |
777 | * x + 1 blocks. We need to skip past those since that is | |
778 | * certainly not the head of the log. By searching for | |
779 | * last_half_cycle-1 we accomplish that. | |
780 | */ | |
1da177e4 | 781 | ASSERT(head_blk <= INT_MAX && |
3f943d85 AE |
782 | (xfs_daddr_t) num_scan_bblks >= head_blk); |
783 | start_blk = log_bbnum - (num_scan_bblks - head_blk); | |
1da177e4 LT |
784 | if ((error = xlog_find_verify_cycle(log, start_blk, |
785 | num_scan_bblks - (int)head_blk, | |
786 | (stop_on_cycle - 1), &new_blk))) | |
787 | goto bp_err; | |
788 | if (new_blk != -1) { | |
789 | head_blk = new_blk; | |
9db127ed | 790 | goto validate_head; |
1da177e4 LT |
791 | } |
792 | ||
793 | /* | |
794 | * Scan beginning of log now. The last part of the physical | |
795 | * log is good. This scan needs to verify that it doesn't find | |
796 | * the last_half_cycle. | |
797 | */ | |
798 | start_blk = 0; | |
799 | ASSERT(head_blk <= INT_MAX); | |
800 | if ((error = xlog_find_verify_cycle(log, | |
801 | start_blk, (int)head_blk, | |
802 | stop_on_cycle, &new_blk))) | |
803 | goto bp_err; | |
804 | if (new_blk != -1) | |
805 | head_blk = new_blk; | |
806 | } | |
807 | ||
9db127ed | 808 | validate_head: |
1da177e4 LT |
809 | /* |
810 | * Now we need to make sure head_blk is not pointing to a block in | |
811 | * the middle of a log record. | |
812 | */ | |
813 | num_scan_bblks = XLOG_REC_SHIFT(log); | |
814 | if (head_blk >= num_scan_bblks) { | |
815 | start_blk = head_blk - num_scan_bblks; /* don't read head_blk */ | |
816 | ||
817 | /* start ptr at last block ptr before head_blk */ | |
818 | if ((error = xlog_find_verify_log_record(log, start_blk, | |
819 | &head_blk, 0)) == -1) { | |
820 | error = XFS_ERROR(EIO); | |
821 | goto bp_err; | |
822 | } else if (error) | |
823 | goto bp_err; | |
824 | } else { | |
825 | start_blk = 0; | |
826 | ASSERT(head_blk <= INT_MAX); | |
827 | if ((error = xlog_find_verify_log_record(log, start_blk, | |
828 | &head_blk, 0)) == -1) { | |
829 | /* We hit the beginning of the log during our search */ | |
3f943d85 | 830 | start_blk = log_bbnum - (num_scan_bblks - head_blk); |
1da177e4 LT |
831 | new_blk = log_bbnum; |
832 | ASSERT(start_blk <= INT_MAX && | |
833 | (xfs_daddr_t) log_bbnum-start_blk >= 0); | |
834 | ASSERT(head_blk <= INT_MAX); | |
835 | if ((error = xlog_find_verify_log_record(log, | |
836 | start_blk, &new_blk, | |
837 | (int)head_blk)) == -1) { | |
838 | error = XFS_ERROR(EIO); | |
839 | goto bp_err; | |
840 | } else if (error) | |
841 | goto bp_err; | |
842 | if (new_blk != log_bbnum) | |
843 | head_blk = new_blk; | |
844 | } else if (error) | |
845 | goto bp_err; | |
846 | } | |
847 | ||
848 | xlog_put_bp(bp); | |
849 | if (head_blk == log_bbnum) | |
850 | *return_head_blk = 0; | |
851 | else | |
852 | *return_head_blk = head_blk; | |
853 | /* | |
854 | * When returning here, we have a good block number. Bad block | |
855 | * means that during a previous crash, we didn't have a clean break | |
856 | * from cycle number N to cycle number N-1. In this case, we need | |
857 | * to find the first block with cycle number N-1. | |
858 | */ | |
859 | return 0; | |
860 | ||
861 | bp_err: | |
862 | xlog_put_bp(bp); | |
863 | ||
864 | if (error) | |
a0fa2b67 | 865 | xfs_warn(log->l_mp, "failed to find log head"); |
1da177e4 LT |
866 | return error; |
867 | } | |
868 | ||
869 | /* | |
870 | * Find the sync block number or the tail of the log. | |
871 | * | |
872 | * This will be the block number of the last record to have its | |
873 | * associated buffers synced to disk. Every log record header has | |
874 | * a sync lsn embedded in it. LSNs hold block numbers, so it is easy | |
875 | * to get a sync block number. The only concern is to figure out which | |
876 | * log record header to believe. | |
877 | * | |
878 | * The following algorithm uses the log record header with the largest | |
879 | * lsn. The entire log record does not need to be valid. We only care | |
880 | * that the header is valid. | |
881 | * | |
882 | * We could speed up search by using current head_blk buffer, but it is not | |
883 | * available. | |
884 | */ | |
5d77c0dc | 885 | STATIC int |
1da177e4 | 886 | xlog_find_tail( |
9a8d2fdb | 887 | struct xlog *log, |
1da177e4 | 888 | xfs_daddr_t *head_blk, |
65be6054 | 889 | xfs_daddr_t *tail_blk) |
1da177e4 LT |
890 | { |
891 | xlog_rec_header_t *rhead; | |
892 | xlog_op_header_t *op_head; | |
893 | xfs_caddr_t offset = NULL; | |
894 | xfs_buf_t *bp; | |
895 | int error, i, found; | |
896 | xfs_daddr_t umount_data_blk; | |
897 | xfs_daddr_t after_umount_blk; | |
898 | xfs_lsn_t tail_lsn; | |
899 | int hblks; | |
900 | ||
901 | found = 0; | |
902 | ||
903 | /* | |
904 | * Find previous log record | |
905 | */ | |
906 | if ((error = xlog_find_head(log, head_blk))) | |
907 | return error; | |
908 | ||
909 | bp = xlog_get_bp(log, 1); | |
910 | if (!bp) | |
911 | return ENOMEM; | |
912 | if (*head_blk == 0) { /* special case */ | |
076e6acb CH |
913 | error = xlog_bread(log, 0, 1, bp, &offset); |
914 | if (error) | |
9db127ed | 915 | goto done; |
076e6acb | 916 | |
03bea6fe | 917 | if (xlog_get_cycle(offset) == 0) { |
1da177e4 LT |
918 | *tail_blk = 0; |
919 | /* leave all other log inited values alone */ | |
9db127ed | 920 | goto done; |
1da177e4 LT |
921 | } |
922 | } | |
923 | ||
924 | /* | |
925 | * Search backwards looking for log record header block | |
926 | */ | |
927 | ASSERT(*head_blk < INT_MAX); | |
928 | for (i = (int)(*head_blk) - 1; i >= 0; i--) { | |
076e6acb CH |
929 | error = xlog_bread(log, i, 1, bp, &offset); |
930 | if (error) | |
9db127ed | 931 | goto done; |
076e6acb | 932 | |
69ef921b | 933 | if (*(__be32 *)offset == cpu_to_be32(XLOG_HEADER_MAGIC_NUM)) { |
1da177e4 LT |
934 | found = 1; |
935 | break; | |
936 | } | |
937 | } | |
938 | /* | |
939 | * If we haven't found the log record header block, start looking | |
940 | * again from the end of the physical log. XXXmiken: There should be | |
941 | * a check here to make sure we didn't search more than N blocks in | |
942 | * the previous code. | |
943 | */ | |
944 | if (!found) { | |
945 | for (i = log->l_logBBsize - 1; i >= (int)(*head_blk); i--) { | |
076e6acb CH |
946 | error = xlog_bread(log, i, 1, bp, &offset); |
947 | if (error) | |
9db127ed | 948 | goto done; |
076e6acb | 949 | |
69ef921b CH |
950 | if (*(__be32 *)offset == |
951 | cpu_to_be32(XLOG_HEADER_MAGIC_NUM)) { | |
1da177e4 LT |
952 | found = 2; |
953 | break; | |
954 | } | |
955 | } | |
956 | } | |
957 | if (!found) { | |
a0fa2b67 | 958 | xfs_warn(log->l_mp, "%s: couldn't find sync record", __func__); |
050a1952 | 959 | xlog_put_bp(bp); |
1da177e4 LT |
960 | ASSERT(0); |
961 | return XFS_ERROR(EIO); | |
962 | } | |
963 | ||
964 | /* find blk_no of tail of log */ | |
965 | rhead = (xlog_rec_header_t *)offset; | |
b53e675d | 966 | *tail_blk = BLOCK_LSN(be64_to_cpu(rhead->h_tail_lsn)); |
1da177e4 LT |
967 | |
968 | /* | |
969 | * Reset log values according to the state of the log when we | |
970 | * crashed. In the case where head_blk == 0, we bump curr_cycle | |
971 | * one because the next write starts a new cycle rather than | |
972 | * continuing the cycle of the last good log record. At this | |
973 | * point we have guaranteed that all partial log records have been | |
974 | * accounted for. Therefore, we know that the last good log record | |
975 | * written was complete and ended exactly on the end boundary | |
976 | * of the physical log. | |
977 | */ | |
978 | log->l_prev_block = i; | |
979 | log->l_curr_block = (int)*head_blk; | |
b53e675d | 980 | log->l_curr_cycle = be32_to_cpu(rhead->h_cycle); |
1da177e4 LT |
981 | if (found == 2) |
982 | log->l_curr_cycle++; | |
1c3cb9ec | 983 | atomic64_set(&log->l_tail_lsn, be64_to_cpu(rhead->h_tail_lsn)); |
84f3c683 | 984 | atomic64_set(&log->l_last_sync_lsn, be64_to_cpu(rhead->h_lsn)); |
28496968 | 985 | xlog_assign_grant_head(&log->l_reserve_head.grant, log->l_curr_cycle, |
a69ed03c | 986 | BBTOB(log->l_curr_block)); |
28496968 | 987 | xlog_assign_grant_head(&log->l_write_head.grant, log->l_curr_cycle, |
a69ed03c | 988 | BBTOB(log->l_curr_block)); |
1da177e4 LT |
989 | |
990 | /* | |
991 | * Look for unmount record. If we find it, then we know there | |
992 | * was a clean unmount. Since 'i' could be the last block in | |
993 | * the physical log, we convert to a log block before comparing | |
994 | * to the head_blk. | |
995 | * | |
996 | * Save the current tail lsn to use to pass to | |
997 | * xlog_clear_stale_blocks() below. We won't want to clear the | |
998 | * unmount record if there is one, so we pass the lsn of the | |
999 | * unmount record rather than the block after it. | |
1000 | */ | |
62118709 | 1001 | if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { |
b53e675d CH |
1002 | int h_size = be32_to_cpu(rhead->h_size); |
1003 | int h_version = be32_to_cpu(rhead->h_version); | |
1da177e4 LT |
1004 | |
1005 | if ((h_version & XLOG_VERSION_2) && | |
1006 | (h_size > XLOG_HEADER_CYCLE_SIZE)) { | |
1007 | hblks = h_size / XLOG_HEADER_CYCLE_SIZE; | |
1008 | if (h_size % XLOG_HEADER_CYCLE_SIZE) | |
1009 | hblks++; | |
1010 | } else { | |
1011 | hblks = 1; | |
1012 | } | |
1013 | } else { | |
1014 | hblks = 1; | |
1015 | } | |
1016 | after_umount_blk = (i + hblks + (int) | |
b53e675d | 1017 | BTOBB(be32_to_cpu(rhead->h_len))) % log->l_logBBsize; |
1c3cb9ec | 1018 | tail_lsn = atomic64_read(&log->l_tail_lsn); |
1da177e4 | 1019 | if (*head_blk == after_umount_blk && |
b53e675d | 1020 | be32_to_cpu(rhead->h_num_logops) == 1) { |
1da177e4 | 1021 | umount_data_blk = (i + hblks) % log->l_logBBsize; |
076e6acb CH |
1022 | error = xlog_bread(log, umount_data_blk, 1, bp, &offset); |
1023 | if (error) | |
9db127ed | 1024 | goto done; |
076e6acb | 1025 | |
1da177e4 LT |
1026 | op_head = (xlog_op_header_t *)offset; |
1027 | if (op_head->oh_flags & XLOG_UNMOUNT_TRANS) { | |
1028 | /* | |
1029 | * Set tail and last sync so that newly written | |
1030 | * log records will point recovery to after the | |
1031 | * current unmount record. | |
1032 | */ | |
1c3cb9ec DC |
1033 | xlog_assign_atomic_lsn(&log->l_tail_lsn, |
1034 | log->l_curr_cycle, after_umount_blk); | |
1035 | xlog_assign_atomic_lsn(&log->l_last_sync_lsn, | |
1036 | log->l_curr_cycle, after_umount_blk); | |
1da177e4 | 1037 | *tail_blk = after_umount_blk; |
92821e2b DC |
1038 | |
1039 | /* | |
1040 | * Note that the unmount was clean. If the unmount | |
1041 | * was not clean, we need to know this to rebuild the | |
1042 | * superblock counters from the perag headers if we | |
1043 | * have a filesystem using non-persistent counters. | |
1044 | */ | |
1045 | log->l_mp->m_flags |= XFS_MOUNT_WAS_CLEAN; | |
1da177e4 LT |
1046 | } |
1047 | } | |
1048 | ||
1049 | /* | |
1050 | * Make sure that there are no blocks in front of the head | |
1051 | * with the same cycle number as the head. This can happen | |
1052 | * because we allow multiple outstanding log writes concurrently, | |
1053 | * and the later writes might make it out before earlier ones. | |
1054 | * | |
1055 | * We use the lsn from before modifying it so that we'll never | |
1056 | * overwrite the unmount record after a clean unmount. | |
1057 | * | |
1058 | * Do this only if we are going to recover the filesystem | |
1059 | * | |
1060 | * NOTE: This used to say "if (!readonly)" | |
1061 | * However on Linux, we can & do recover a read-only filesystem. | |
1062 | * We only skip recovery if NORECOVERY is specified on mount, | |
1063 | * in which case we would not be here. | |
1064 | * | |
1065 | * But... if the -device- itself is readonly, just skip this. | |
1066 | * We can't recover this device anyway, so it won't matter. | |
1067 | */ | |
9db127ed | 1068 | if (!xfs_readonly_buftarg(log->l_mp->m_logdev_targp)) |
1da177e4 | 1069 | error = xlog_clear_stale_blocks(log, tail_lsn); |
1da177e4 | 1070 | |
9db127ed | 1071 | done: |
1da177e4 LT |
1072 | xlog_put_bp(bp); |
1073 | ||
1074 | if (error) | |
a0fa2b67 | 1075 | xfs_warn(log->l_mp, "failed to locate log tail"); |
1da177e4 LT |
1076 | return error; |
1077 | } | |
1078 | ||
1079 | /* | |
1080 | * Is the log zeroed at all? | |
1081 | * | |
1082 | * The last binary search should be changed to perform an X block read | |
1083 | * once X becomes small enough. You can then search linearly through | |
1084 | * the X blocks. This will cut down on the number of reads we need to do. | |
1085 | * | |
1086 | * If the log is partially zeroed, this routine will pass back the blkno | |
1087 | * of the first block with cycle number 0. It won't have a complete LR | |
1088 | * preceding it. | |
1089 | * | |
1090 | * Return: | |
1091 | * 0 => the log is completely written to | |
1092 | * -1 => use *blk_no as the first block of the log | |
1093 | * >0 => error has occurred | |
1094 | */ | |
a8272ce0 | 1095 | STATIC int |
1da177e4 | 1096 | xlog_find_zeroed( |
9a8d2fdb | 1097 | struct xlog *log, |
1da177e4 LT |
1098 | xfs_daddr_t *blk_no) |
1099 | { | |
1100 | xfs_buf_t *bp; | |
1101 | xfs_caddr_t offset; | |
1102 | uint first_cycle, last_cycle; | |
1103 | xfs_daddr_t new_blk, last_blk, start_blk; | |
1104 | xfs_daddr_t num_scan_bblks; | |
1105 | int error, log_bbnum = log->l_logBBsize; | |
1106 | ||
6fdf8ccc NS |
1107 | *blk_no = 0; |
1108 | ||
1da177e4 LT |
1109 | /* check totally zeroed log */ |
1110 | bp = xlog_get_bp(log, 1); | |
1111 | if (!bp) | |
1112 | return ENOMEM; | |
076e6acb CH |
1113 | error = xlog_bread(log, 0, 1, bp, &offset); |
1114 | if (error) | |
1da177e4 | 1115 | goto bp_err; |
076e6acb | 1116 | |
03bea6fe | 1117 | first_cycle = xlog_get_cycle(offset); |
1da177e4 LT |
1118 | if (first_cycle == 0) { /* completely zeroed log */ |
1119 | *blk_no = 0; | |
1120 | xlog_put_bp(bp); | |
1121 | return -1; | |
1122 | } | |
1123 | ||
1124 | /* check partially zeroed log */ | |
076e6acb CH |
1125 | error = xlog_bread(log, log_bbnum-1, 1, bp, &offset); |
1126 | if (error) | |
1da177e4 | 1127 | goto bp_err; |
076e6acb | 1128 | |
03bea6fe | 1129 | last_cycle = xlog_get_cycle(offset); |
1da177e4 LT |
1130 | if (last_cycle != 0) { /* log completely written to */ |
1131 | xlog_put_bp(bp); | |
1132 | return 0; | |
1133 | } else if (first_cycle != 1) { | |
1134 | /* | |
1135 | * If the cycle of the last block is zero, the cycle of | |
1136 | * the first block must be 1. If it's not, maybe we're | |
1137 | * not looking at a log... Bail out. | |
1138 | */ | |
a0fa2b67 DC |
1139 | xfs_warn(log->l_mp, |
1140 | "Log inconsistent or not a log (last==0, first!=1)"); | |
5d0a6549 ES |
1141 | error = XFS_ERROR(EINVAL); |
1142 | goto bp_err; | |
1da177e4 LT |
1143 | } |
1144 | ||
1145 | /* we have a partially zeroed log */ | |
1146 | last_blk = log_bbnum-1; | |
1147 | if ((error = xlog_find_cycle_start(log, bp, 0, &last_blk, 0))) | |
1148 | goto bp_err; | |
1149 | ||
1150 | /* | |
1151 | * Validate the answer. Because there is no way to guarantee that | |
1152 | * the entire log is made up of log records which are the same size, | |
1153 | * we scan over the defined maximum blocks. At this point, the maximum | |
1154 | * is not chosen to mean anything special. XXXmiken | |
1155 | */ | |
1156 | num_scan_bblks = XLOG_TOTAL_REC_SHIFT(log); | |
1157 | ASSERT(num_scan_bblks <= INT_MAX); | |
1158 | ||
1159 | if (last_blk < num_scan_bblks) | |
1160 | num_scan_bblks = last_blk; | |
1161 | start_blk = last_blk - num_scan_bblks; | |
1162 | ||
1163 | /* | |
1164 | * We search for any instances of cycle number 0 that occur before | |
1165 | * our current estimate of the head. What we're trying to detect is | |
1166 | * 1 ... | 0 | 1 | 0... | |
1167 | * ^ binary search ends here | |
1168 | */ | |
1169 | if ((error = xlog_find_verify_cycle(log, start_blk, | |
1170 | (int)num_scan_bblks, 0, &new_blk))) | |
1171 | goto bp_err; | |
1172 | if (new_blk != -1) | |
1173 | last_blk = new_blk; | |
1174 | ||
1175 | /* | |
1176 | * Potentially backup over partial log record write. We don't need | |
1177 | * to search the end of the log because we know it is zero. | |
1178 | */ | |
1179 | if ((error = xlog_find_verify_log_record(log, start_blk, | |
1180 | &last_blk, 0)) == -1) { | |
1181 | error = XFS_ERROR(EIO); | |
1182 | goto bp_err; | |
1183 | } else if (error) | |
1184 | goto bp_err; | |
1185 | ||
1186 | *blk_no = last_blk; | |
1187 | bp_err: | |
1188 | xlog_put_bp(bp); | |
1189 | if (error) | |
1190 | return error; | |
1191 | return -1; | |
1192 | } | |
1193 | ||
1194 | /* | |
1195 | * These are simple subroutines used by xlog_clear_stale_blocks() below | |
1196 | * to initialize a buffer full of empty log record headers and write | |
1197 | * them into the log. | |
1198 | */ | |
1199 | STATIC void | |
1200 | xlog_add_record( | |
9a8d2fdb | 1201 | struct xlog *log, |
1da177e4 LT |
1202 | xfs_caddr_t buf, |
1203 | int cycle, | |
1204 | int block, | |
1205 | int tail_cycle, | |
1206 | int tail_block) | |
1207 | { | |
1208 | xlog_rec_header_t *recp = (xlog_rec_header_t *)buf; | |
1209 | ||
1210 | memset(buf, 0, BBSIZE); | |
b53e675d CH |
1211 | recp->h_magicno = cpu_to_be32(XLOG_HEADER_MAGIC_NUM); |
1212 | recp->h_cycle = cpu_to_be32(cycle); | |
1213 | recp->h_version = cpu_to_be32( | |
62118709 | 1214 | xfs_sb_version_haslogv2(&log->l_mp->m_sb) ? 2 : 1); |
b53e675d CH |
1215 | recp->h_lsn = cpu_to_be64(xlog_assign_lsn(cycle, block)); |
1216 | recp->h_tail_lsn = cpu_to_be64(xlog_assign_lsn(tail_cycle, tail_block)); | |
1217 | recp->h_fmt = cpu_to_be32(XLOG_FMT); | |
1da177e4 LT |
1218 | memcpy(&recp->h_fs_uuid, &log->l_mp->m_sb.sb_uuid, sizeof(uuid_t)); |
1219 | } | |
1220 | ||
1221 | STATIC int | |
1222 | xlog_write_log_records( | |
9a8d2fdb | 1223 | struct xlog *log, |
1da177e4 LT |
1224 | int cycle, |
1225 | int start_block, | |
1226 | int blocks, | |
1227 | int tail_cycle, | |
1228 | int tail_block) | |
1229 | { | |
1230 | xfs_caddr_t offset; | |
1231 | xfs_buf_t *bp; | |
1232 | int balign, ealign; | |
69ce58f0 | 1233 | int sectbb = log->l_sectBBsize; |
1da177e4 LT |
1234 | int end_block = start_block + blocks; |
1235 | int bufblks; | |
1236 | int error = 0; | |
1237 | int i, j = 0; | |
1238 | ||
6881a229 AE |
1239 | /* |
1240 | * Greedily allocate a buffer big enough to handle the full | |
1241 | * range of basic blocks to be written. If that fails, try | |
1242 | * a smaller size. We need to be able to write at least a | |
1243 | * log sector, or we're out of luck. | |
1244 | */ | |
1da177e4 | 1245 | bufblks = 1 << ffs(blocks); |
81158e0c DC |
1246 | while (bufblks > log->l_logBBsize) |
1247 | bufblks >>= 1; | |
1da177e4 LT |
1248 | while (!(bp = xlog_get_bp(log, bufblks))) { |
1249 | bufblks >>= 1; | |
69ce58f0 | 1250 | if (bufblks < sectbb) |
1da177e4 LT |
1251 | return ENOMEM; |
1252 | } | |
1253 | ||
1254 | /* We may need to do a read at the start to fill in part of | |
1255 | * the buffer in the starting sector not covered by the first | |
1256 | * write below. | |
1257 | */ | |
5c17f533 | 1258 | balign = round_down(start_block, sectbb); |
1da177e4 | 1259 | if (balign != start_block) { |
076e6acb CH |
1260 | error = xlog_bread_noalign(log, start_block, 1, bp); |
1261 | if (error) | |
1262 | goto out_put_bp; | |
1263 | ||
1da177e4 LT |
1264 | j = start_block - balign; |
1265 | } | |
1266 | ||
1267 | for (i = start_block; i < end_block; i += bufblks) { | |
1268 | int bcount, endcount; | |
1269 | ||
1270 | bcount = min(bufblks, end_block - start_block); | |
1271 | endcount = bcount - j; | |
1272 | ||
1273 | /* We may need to do a read at the end to fill in part of | |
1274 | * the buffer in the final sector not covered by the write. | |
1275 | * If this is the same sector as the above read, skip it. | |
1276 | */ | |
5c17f533 | 1277 | ealign = round_down(end_block, sectbb); |
1da177e4 | 1278 | if (j == 0 && (start_block + endcount > ealign)) { |
62926044 | 1279 | offset = bp->b_addr + BBTOB(ealign - start_block); |
44396476 DC |
1280 | error = xlog_bread_offset(log, ealign, sectbb, |
1281 | bp, offset); | |
076e6acb CH |
1282 | if (error) |
1283 | break; | |
1284 | ||
1da177e4 LT |
1285 | } |
1286 | ||
1287 | offset = xlog_align(log, start_block, endcount, bp); | |
1288 | for (; j < endcount; j++) { | |
1289 | xlog_add_record(log, offset, cycle, i+j, | |
1290 | tail_cycle, tail_block); | |
1291 | offset += BBSIZE; | |
1292 | } | |
1293 | error = xlog_bwrite(log, start_block, endcount, bp); | |
1294 | if (error) | |
1295 | break; | |
1296 | start_block += endcount; | |
1297 | j = 0; | |
1298 | } | |
076e6acb CH |
1299 | |
1300 | out_put_bp: | |
1da177e4 LT |
1301 | xlog_put_bp(bp); |
1302 | return error; | |
1303 | } | |
1304 | ||
1305 | /* | |
1306 | * This routine is called to blow away any incomplete log writes out | |
1307 | * in front of the log head. We do this so that we won't become confused | |
1308 | * if we come up, write only a little bit more, and then crash again. | |
1309 | * If we leave the partial log records out there, this situation could | |
1310 | * cause us to think those partial writes are valid blocks since they | |
1311 | * have the current cycle number. We get rid of them by overwriting them | |
1312 | * with empty log records with the old cycle number rather than the | |
1313 | * current one. | |
1314 | * | |
1315 | * The tail lsn is passed in rather than taken from | |
1316 | * the log so that we will not write over the unmount record after a | |
1317 | * clean unmount in a 512 block log. Doing so would leave the log without | |
1318 | * any valid log records in it until a new one was written. If we crashed | |
1319 | * during that time we would not be able to recover. | |
1320 | */ | |
1321 | STATIC int | |
1322 | xlog_clear_stale_blocks( | |
9a8d2fdb | 1323 | struct xlog *log, |
1da177e4 LT |
1324 | xfs_lsn_t tail_lsn) |
1325 | { | |
1326 | int tail_cycle, head_cycle; | |
1327 | int tail_block, head_block; | |
1328 | int tail_distance, max_distance; | |
1329 | int distance; | |
1330 | int error; | |
1331 | ||
1332 | tail_cycle = CYCLE_LSN(tail_lsn); | |
1333 | tail_block = BLOCK_LSN(tail_lsn); | |
1334 | head_cycle = log->l_curr_cycle; | |
1335 | head_block = log->l_curr_block; | |
1336 | ||
1337 | /* | |
1338 | * Figure out the distance between the new head of the log | |
1339 | * and the tail. We want to write over any blocks beyond the | |
1340 | * head that we may have written just before the crash, but | |
1341 | * we don't want to overwrite the tail of the log. | |
1342 | */ | |
1343 | if (head_cycle == tail_cycle) { | |
1344 | /* | |
1345 | * The tail is behind the head in the physical log, | |
1346 | * so the distance from the head to the tail is the | |
1347 | * distance from the head to the end of the log plus | |
1348 | * the distance from the beginning of the log to the | |
1349 | * tail. | |
1350 | */ | |
1351 | if (unlikely(head_block < tail_block || head_block >= log->l_logBBsize)) { | |
1352 | XFS_ERROR_REPORT("xlog_clear_stale_blocks(1)", | |
1353 | XFS_ERRLEVEL_LOW, log->l_mp); | |
1354 | return XFS_ERROR(EFSCORRUPTED); | |
1355 | } | |
1356 | tail_distance = tail_block + (log->l_logBBsize - head_block); | |
1357 | } else { | |
1358 | /* | |
1359 | * The head is behind the tail in the physical log, | |
1360 | * so the distance from the head to the tail is just | |
1361 | * the tail block minus the head block. | |
1362 | */ | |
1363 | if (unlikely(head_block >= tail_block || head_cycle != (tail_cycle + 1))){ | |
1364 | XFS_ERROR_REPORT("xlog_clear_stale_blocks(2)", | |
1365 | XFS_ERRLEVEL_LOW, log->l_mp); | |
1366 | return XFS_ERROR(EFSCORRUPTED); | |
1367 | } | |
1368 | tail_distance = tail_block - head_block; | |
1369 | } | |
1370 | ||
1371 | /* | |
1372 | * If the head is right up against the tail, we can't clear | |
1373 | * anything. | |
1374 | */ | |
1375 | if (tail_distance <= 0) { | |
1376 | ASSERT(tail_distance == 0); | |
1377 | return 0; | |
1378 | } | |
1379 | ||
1380 | max_distance = XLOG_TOTAL_REC_SHIFT(log); | |
1381 | /* | |
1382 | * Take the smaller of the maximum amount of outstanding I/O | |
1383 | * we could have and the distance to the tail to clear out. | |
1384 | * We take the smaller so that we don't overwrite the tail and | |
1385 | * we don't waste all day writing from the head to the tail | |
1386 | * for no reason. | |
1387 | */ | |
1388 | max_distance = MIN(max_distance, tail_distance); | |
1389 | ||
1390 | if ((head_block + max_distance) <= log->l_logBBsize) { | |
1391 | /* | |
1392 | * We can stomp all the blocks we need to without | |
1393 | * wrapping around the end of the log. Just do it | |
1394 | * in a single write. Use the cycle number of the | |
1395 | * current cycle minus one so that the log will look like: | |
1396 | * n ... | n - 1 ... | |
1397 | */ | |
1398 | error = xlog_write_log_records(log, (head_cycle - 1), | |
1399 | head_block, max_distance, tail_cycle, | |
1400 | tail_block); | |
1401 | if (error) | |
1402 | return error; | |
1403 | } else { | |
1404 | /* | |
1405 | * We need to wrap around the end of the physical log in | |
1406 | * order to clear all the blocks. Do it in two separate | |
1407 | * I/Os. The first write should be from the head to the | |
1408 | * end of the physical log, and it should use the current | |
1409 | * cycle number minus one just like above. | |
1410 | */ | |
1411 | distance = log->l_logBBsize - head_block; | |
1412 | error = xlog_write_log_records(log, (head_cycle - 1), | |
1413 | head_block, distance, tail_cycle, | |
1414 | tail_block); | |
1415 | ||
1416 | if (error) | |
1417 | return error; | |
1418 | ||
1419 | /* | |
1420 | * Now write the blocks at the start of the physical log. | |
1421 | * This writes the remainder of the blocks we want to clear. | |
1422 | * It uses the current cycle number since we're now on the | |
1423 | * same cycle as the head so that we get: | |
1424 | * n ... n ... | n - 1 ... | |
1425 | * ^^^^^ blocks we're writing | |
1426 | */ | |
1427 | distance = max_distance - (log->l_logBBsize - head_block); | |
1428 | error = xlog_write_log_records(log, head_cycle, 0, distance, | |
1429 | tail_cycle, tail_block); | |
1430 | if (error) | |
1431 | return error; | |
1432 | } | |
1433 | ||
1434 | return 0; | |
1435 | } | |
1436 | ||
1437 | /****************************************************************************** | |
1438 | * | |
1439 | * Log recover routines | |
1440 | * | |
1441 | ****************************************************************************** | |
1442 | */ | |
1443 | ||
1444 | STATIC xlog_recover_t * | |
1445 | xlog_recover_find_tid( | |
f0a76953 | 1446 | struct hlist_head *head, |
1da177e4 LT |
1447 | xlog_tid_t tid) |
1448 | { | |
f0a76953 | 1449 | xlog_recover_t *trans; |
1da177e4 | 1450 | |
b67bfe0d | 1451 | hlist_for_each_entry(trans, head, r_list) { |
f0a76953 DC |
1452 | if (trans->r_log_tid == tid) |
1453 | return trans; | |
1da177e4 | 1454 | } |
f0a76953 | 1455 | return NULL; |
1da177e4 LT |
1456 | } |
1457 | ||
1458 | STATIC void | |
f0a76953 DC |
1459 | xlog_recover_new_tid( |
1460 | struct hlist_head *head, | |
1461 | xlog_tid_t tid, | |
1462 | xfs_lsn_t lsn) | |
1da177e4 | 1463 | { |
f0a76953 DC |
1464 | xlog_recover_t *trans; |
1465 | ||
1466 | trans = kmem_zalloc(sizeof(xlog_recover_t), KM_SLEEP); | |
1467 | trans->r_log_tid = tid; | |
1468 | trans->r_lsn = lsn; | |
1469 | INIT_LIST_HEAD(&trans->r_itemq); | |
1470 | ||
1471 | INIT_HLIST_NODE(&trans->r_list); | |
1472 | hlist_add_head(&trans->r_list, head); | |
1da177e4 LT |
1473 | } |
1474 | ||
1475 | STATIC void | |
1476 | xlog_recover_add_item( | |
f0a76953 | 1477 | struct list_head *head) |
1da177e4 LT |
1478 | { |
1479 | xlog_recover_item_t *item; | |
1480 | ||
1481 | item = kmem_zalloc(sizeof(xlog_recover_item_t), KM_SLEEP); | |
f0a76953 DC |
1482 | INIT_LIST_HEAD(&item->ri_list); |
1483 | list_add_tail(&item->ri_list, head); | |
1da177e4 LT |
1484 | } |
1485 | ||
1486 | STATIC int | |
1487 | xlog_recover_add_to_cont_trans( | |
ad223e60 MT |
1488 | struct xlog *log, |
1489 | struct xlog_recover *trans, | |
1da177e4 LT |
1490 | xfs_caddr_t dp, |
1491 | int len) | |
1492 | { | |
1493 | xlog_recover_item_t *item; | |
1494 | xfs_caddr_t ptr, old_ptr; | |
1495 | int old_len; | |
1496 | ||
f0a76953 | 1497 | if (list_empty(&trans->r_itemq)) { |
1da177e4 LT |
1498 | /* finish copying rest of trans header */ |
1499 | xlog_recover_add_item(&trans->r_itemq); | |
1500 | ptr = (xfs_caddr_t) &trans->r_theader + | |
1501 | sizeof(xfs_trans_header_t) - len; | |
1502 | memcpy(ptr, dp, len); /* d, s, l */ | |
1503 | return 0; | |
1504 | } | |
f0a76953 DC |
1505 | /* take the tail entry */ |
1506 | item = list_entry(trans->r_itemq.prev, xlog_recover_item_t, ri_list); | |
1da177e4 LT |
1507 | |
1508 | old_ptr = item->ri_buf[item->ri_cnt-1].i_addr; | |
1509 | old_len = item->ri_buf[item->ri_cnt-1].i_len; | |
1510 | ||
45053603 | 1511 | ptr = kmem_realloc(old_ptr, len+old_len, old_len, KM_SLEEP); |
1da177e4 LT |
1512 | memcpy(&ptr[old_len], dp, len); /* d, s, l */ |
1513 | item->ri_buf[item->ri_cnt-1].i_len += len; | |
1514 | item->ri_buf[item->ri_cnt-1].i_addr = ptr; | |
9abbc539 | 1515 | trace_xfs_log_recover_item_add_cont(log, trans, item, 0); |
1da177e4 LT |
1516 | return 0; |
1517 | } | |
1518 | ||
1519 | /* | |
1520 | * The next region to add is the start of a new region. It could be | |
1521 | * a whole region or it could be the first part of a new region. Because | |
1522 | * of this, the assumption here is that the type and size fields of all | |
1523 | * format structures fit into the first 32 bits of the structure. | |
1524 | * | |
1525 | * This works because all regions must be 32 bit aligned. Therefore, we | |
1526 | * either have both fields or we have neither field. In the case we have | |
1527 | * neither field, the data part of the region is zero length. We only have | |
1528 | * a log_op_header and can throw away the header since a new one will appear | |
1529 | * later. If we have at least 4 bytes, then we can determine how many regions | |
1530 | * will appear in the current log item. | |
1531 | */ | |
1532 | STATIC int | |
1533 | xlog_recover_add_to_trans( | |
ad223e60 MT |
1534 | struct xlog *log, |
1535 | struct xlog_recover *trans, | |
1da177e4 LT |
1536 | xfs_caddr_t dp, |
1537 | int len) | |
1538 | { | |
1539 | xfs_inode_log_format_t *in_f; /* any will do */ | |
1540 | xlog_recover_item_t *item; | |
1541 | xfs_caddr_t ptr; | |
1542 | ||
1543 | if (!len) | |
1544 | return 0; | |
f0a76953 | 1545 | if (list_empty(&trans->r_itemq)) { |
5a792c45 DC |
1546 | /* we need to catch log corruptions here */ |
1547 | if (*(uint *)dp != XFS_TRANS_HEADER_MAGIC) { | |
a0fa2b67 DC |
1548 | xfs_warn(log->l_mp, "%s: bad header magic number", |
1549 | __func__); | |
5a792c45 DC |
1550 | ASSERT(0); |
1551 | return XFS_ERROR(EIO); | |
1552 | } | |
1da177e4 LT |
1553 | if (len == sizeof(xfs_trans_header_t)) |
1554 | xlog_recover_add_item(&trans->r_itemq); | |
1555 | memcpy(&trans->r_theader, dp, len); /* d, s, l */ | |
1556 | return 0; | |
1557 | } | |
1558 | ||
1559 | ptr = kmem_alloc(len, KM_SLEEP); | |
1560 | memcpy(ptr, dp, len); | |
1561 | in_f = (xfs_inode_log_format_t *)ptr; | |
1562 | ||
f0a76953 DC |
1563 | /* take the tail entry */ |
1564 | item = list_entry(trans->r_itemq.prev, xlog_recover_item_t, ri_list); | |
1565 | if (item->ri_total != 0 && | |
1566 | item->ri_total == item->ri_cnt) { | |
1567 | /* tail item is in use, get a new one */ | |
1da177e4 | 1568 | xlog_recover_add_item(&trans->r_itemq); |
f0a76953 DC |
1569 | item = list_entry(trans->r_itemq.prev, |
1570 | xlog_recover_item_t, ri_list); | |
1da177e4 | 1571 | } |
1da177e4 LT |
1572 | |
1573 | if (item->ri_total == 0) { /* first region to be added */ | |
e8fa6b48 CH |
1574 | if (in_f->ilf_size == 0 || |
1575 | in_f->ilf_size > XLOG_MAX_REGIONS_IN_ITEM) { | |
a0fa2b67 DC |
1576 | xfs_warn(log->l_mp, |
1577 | "bad number of regions (%d) in inode log format", | |
e8fa6b48 CH |
1578 | in_f->ilf_size); |
1579 | ASSERT(0); | |
aaaae980 | 1580 | kmem_free(ptr); |
e8fa6b48 CH |
1581 | return XFS_ERROR(EIO); |
1582 | } | |
1583 | ||
1584 | item->ri_total = in_f->ilf_size; | |
1585 | item->ri_buf = | |
1586 | kmem_zalloc(item->ri_total * sizeof(xfs_log_iovec_t), | |
1587 | KM_SLEEP); | |
1da177e4 LT |
1588 | } |
1589 | ASSERT(item->ri_total > item->ri_cnt); | |
1590 | /* Description region is ri_buf[0] */ | |
1591 | item->ri_buf[item->ri_cnt].i_addr = ptr; | |
1592 | item->ri_buf[item->ri_cnt].i_len = len; | |
1593 | item->ri_cnt++; | |
9abbc539 | 1594 | trace_xfs_log_recover_item_add(log, trans, item, 0); |
1da177e4 LT |
1595 | return 0; |
1596 | } | |
1597 | ||
f0a76953 | 1598 | /* |
a775ad77 DC |
1599 | * Sort the log items in the transaction. |
1600 | * | |
1601 | * The ordering constraints are defined by the inode allocation and unlink | |
1602 | * behaviour. The rules are: | |
1603 | * | |
1604 | * 1. Every item is only logged once in a given transaction. Hence it | |
1605 | * represents the last logged state of the item. Hence ordering is | |
1606 | * dependent on the order in which operations need to be performed so | |
1607 | * required initial conditions are always met. | |
1608 | * | |
1609 | * 2. Cancelled buffers are recorded in pass 1 in a separate table and | |
1610 | * there's nothing to replay from them so we can simply cull them | |
1611 | * from the transaction. However, we can't do that until after we've | |
1612 | * replayed all the other items because they may be dependent on the | |
1613 | * cancelled buffer and replaying the cancelled buffer can remove it | |
1614 | * form the cancelled buffer table. Hence they have tobe done last. | |
1615 | * | |
1616 | * 3. Inode allocation buffers must be replayed before inode items that | |
28c8e41a DC |
1617 | * read the buffer and replay changes into it. For filesystems using the |
1618 | * ICREATE transactions, this means XFS_LI_ICREATE objects need to get | |
1619 | * treated the same as inode allocation buffers as they create and | |
1620 | * initialise the buffers directly. | |
a775ad77 DC |
1621 | * |
1622 | * 4. Inode unlink buffers must be replayed after inode items are replayed. | |
1623 | * This ensures that inodes are completely flushed to the inode buffer | |
1624 | * in a "free" state before we remove the unlinked inode list pointer. | |
1625 | * | |
1626 | * Hence the ordering needs to be inode allocation buffers first, inode items | |
1627 | * second, inode unlink buffers third and cancelled buffers last. | |
1628 | * | |
1629 | * But there's a problem with that - we can't tell an inode allocation buffer | |
1630 | * apart from a regular buffer, so we can't separate them. We can, however, | |
1631 | * tell an inode unlink buffer from the others, and so we can separate them out | |
1632 | * from all the other buffers and move them to last. | |
1633 | * | |
1634 | * Hence, 4 lists, in order from head to tail: | |
28c8e41a DC |
1635 | * - buffer_list for all buffers except cancelled/inode unlink buffers |
1636 | * - item_list for all non-buffer items | |
1637 | * - inode_buffer_list for inode unlink buffers | |
1638 | * - cancel_list for the cancelled buffers | |
1639 | * | |
1640 | * Note that we add objects to the tail of the lists so that first-to-last | |
1641 | * ordering is preserved within the lists. Adding objects to the head of the | |
1642 | * list means when we traverse from the head we walk them in last-to-first | |
1643 | * order. For cancelled buffers and inode unlink buffers this doesn't matter, | |
1644 | * but for all other items there may be specific ordering that we need to | |
1645 | * preserve. | |
f0a76953 | 1646 | */ |
1da177e4 LT |
1647 | STATIC int |
1648 | xlog_recover_reorder_trans( | |
ad223e60 MT |
1649 | struct xlog *log, |
1650 | struct xlog_recover *trans, | |
9abbc539 | 1651 | int pass) |
1da177e4 | 1652 | { |
f0a76953 | 1653 | xlog_recover_item_t *item, *n; |
2a84108f | 1654 | int error = 0; |
f0a76953 | 1655 | LIST_HEAD(sort_list); |
a775ad77 DC |
1656 | LIST_HEAD(cancel_list); |
1657 | LIST_HEAD(buffer_list); | |
1658 | LIST_HEAD(inode_buffer_list); | |
1659 | LIST_HEAD(inode_list); | |
f0a76953 DC |
1660 | |
1661 | list_splice_init(&trans->r_itemq, &sort_list); | |
1662 | list_for_each_entry_safe(item, n, &sort_list, ri_list) { | |
4e0d5f92 | 1663 | xfs_buf_log_format_t *buf_f = item->ri_buf[0].i_addr; |
1da177e4 | 1664 | |
f0a76953 | 1665 | switch (ITEM_TYPE(item)) { |
28c8e41a DC |
1666 | case XFS_LI_ICREATE: |
1667 | list_move_tail(&item->ri_list, &buffer_list); | |
1668 | break; | |
1da177e4 | 1669 | case XFS_LI_BUF: |
a775ad77 | 1670 | if (buf_f->blf_flags & XFS_BLF_CANCEL) { |
9abbc539 DC |
1671 | trace_xfs_log_recover_item_reorder_head(log, |
1672 | trans, item, pass); | |
a775ad77 | 1673 | list_move(&item->ri_list, &cancel_list); |
1da177e4 LT |
1674 | break; |
1675 | } | |
a775ad77 DC |
1676 | if (buf_f->blf_flags & XFS_BLF_INODE_BUF) { |
1677 | list_move(&item->ri_list, &inode_buffer_list); | |
1678 | break; | |
1679 | } | |
1680 | list_move_tail(&item->ri_list, &buffer_list); | |
1681 | break; | |
1da177e4 | 1682 | case XFS_LI_INODE: |
1da177e4 LT |
1683 | case XFS_LI_DQUOT: |
1684 | case XFS_LI_QUOTAOFF: | |
1685 | case XFS_LI_EFD: | |
1686 | case XFS_LI_EFI: | |
9abbc539 DC |
1687 | trace_xfs_log_recover_item_reorder_tail(log, |
1688 | trans, item, pass); | |
a775ad77 | 1689 | list_move_tail(&item->ri_list, &inode_list); |
1da177e4 LT |
1690 | break; |
1691 | default: | |
a0fa2b67 DC |
1692 | xfs_warn(log->l_mp, |
1693 | "%s: unrecognized type of log operation", | |
1694 | __func__); | |
1da177e4 | 1695 | ASSERT(0); |
2a84108f MT |
1696 | /* |
1697 | * return the remaining items back to the transaction | |
1698 | * item list so they can be freed in caller. | |
1699 | */ | |
1700 | if (!list_empty(&sort_list)) | |
1701 | list_splice_init(&sort_list, &trans->r_itemq); | |
1702 | error = XFS_ERROR(EIO); | |
1703 | goto out; | |
1da177e4 | 1704 | } |
f0a76953 | 1705 | } |
2a84108f | 1706 | out: |
f0a76953 | 1707 | ASSERT(list_empty(&sort_list)); |
a775ad77 DC |
1708 | if (!list_empty(&buffer_list)) |
1709 | list_splice(&buffer_list, &trans->r_itemq); | |
1710 | if (!list_empty(&inode_list)) | |
1711 | list_splice_tail(&inode_list, &trans->r_itemq); | |
1712 | if (!list_empty(&inode_buffer_list)) | |
1713 | list_splice_tail(&inode_buffer_list, &trans->r_itemq); | |
1714 | if (!list_empty(&cancel_list)) | |
1715 | list_splice_tail(&cancel_list, &trans->r_itemq); | |
2a84108f | 1716 | return error; |
1da177e4 LT |
1717 | } |
1718 | ||
1719 | /* | |
1720 | * Build up the table of buf cancel records so that we don't replay | |
1721 | * cancelled data in the second pass. For buffer records that are | |
1722 | * not cancel records, there is nothing to do here so we just return. | |
1723 | * | |
1724 | * If we get a cancel record which is already in the table, this indicates | |
1725 | * that the buffer was cancelled multiple times. In order to ensure | |
1726 | * that during pass 2 we keep the record in the table until we reach its | |
1727 | * last occurrence in the log, we keep a reference count in the cancel | |
1728 | * record in the table to tell us how many times we expect to see this | |
1729 | * record during the second pass. | |
1730 | */ | |
c9f71f5f CH |
1731 | STATIC int |
1732 | xlog_recover_buffer_pass1( | |
ad223e60 MT |
1733 | struct xlog *log, |
1734 | struct xlog_recover_item *item) | |
1da177e4 | 1735 | { |
c9f71f5f | 1736 | xfs_buf_log_format_t *buf_f = item->ri_buf[0].i_addr; |
d5689eaa CH |
1737 | struct list_head *bucket; |
1738 | struct xfs_buf_cancel *bcp; | |
1da177e4 LT |
1739 | |
1740 | /* | |
1741 | * If this isn't a cancel buffer item, then just return. | |
1742 | */ | |
e2714bf8 | 1743 | if (!(buf_f->blf_flags & XFS_BLF_CANCEL)) { |
9abbc539 | 1744 | trace_xfs_log_recover_buf_not_cancel(log, buf_f); |
c9f71f5f | 1745 | return 0; |
9abbc539 | 1746 | } |
1da177e4 LT |
1747 | |
1748 | /* | |
d5689eaa CH |
1749 | * Insert an xfs_buf_cancel record into the hash table of them. |
1750 | * If there is already an identical record, bump its reference count. | |
1da177e4 | 1751 | */ |
d5689eaa CH |
1752 | bucket = XLOG_BUF_CANCEL_BUCKET(log, buf_f->blf_blkno); |
1753 | list_for_each_entry(bcp, bucket, bc_list) { | |
1754 | if (bcp->bc_blkno == buf_f->blf_blkno && | |
1755 | bcp->bc_len == buf_f->blf_len) { | |
1756 | bcp->bc_refcount++; | |
9abbc539 | 1757 | trace_xfs_log_recover_buf_cancel_ref_inc(log, buf_f); |
c9f71f5f | 1758 | return 0; |
1da177e4 | 1759 | } |
d5689eaa CH |
1760 | } |
1761 | ||
1762 | bcp = kmem_alloc(sizeof(struct xfs_buf_cancel), KM_SLEEP); | |
1763 | bcp->bc_blkno = buf_f->blf_blkno; | |
1764 | bcp->bc_len = buf_f->blf_len; | |
1da177e4 | 1765 | bcp->bc_refcount = 1; |
d5689eaa CH |
1766 | list_add_tail(&bcp->bc_list, bucket); |
1767 | ||
9abbc539 | 1768 | trace_xfs_log_recover_buf_cancel_add(log, buf_f); |
c9f71f5f | 1769 | return 0; |
1da177e4 LT |
1770 | } |
1771 | ||
1772 | /* | |
1773 | * Check to see whether the buffer being recovered has a corresponding | |
84a5b730 DC |
1774 | * entry in the buffer cancel record table. If it is, return the cancel |
1775 | * buffer structure to the caller. | |
1da177e4 | 1776 | */ |
84a5b730 DC |
1777 | STATIC struct xfs_buf_cancel * |
1778 | xlog_peek_buffer_cancelled( | |
ad223e60 | 1779 | struct xlog *log, |
1da177e4 LT |
1780 | xfs_daddr_t blkno, |
1781 | uint len, | |
1782 | ushort flags) | |
1783 | { | |
d5689eaa CH |
1784 | struct list_head *bucket; |
1785 | struct xfs_buf_cancel *bcp; | |
1da177e4 | 1786 | |
84a5b730 DC |
1787 | if (!log->l_buf_cancel_table) { |
1788 | /* empty table means no cancelled buffers in the log */ | |
c1155410 | 1789 | ASSERT(!(flags & XFS_BLF_CANCEL)); |
84a5b730 | 1790 | return NULL; |
1da177e4 LT |
1791 | } |
1792 | ||
d5689eaa CH |
1793 | bucket = XLOG_BUF_CANCEL_BUCKET(log, blkno); |
1794 | list_for_each_entry(bcp, bucket, bc_list) { | |
1795 | if (bcp->bc_blkno == blkno && bcp->bc_len == len) | |
84a5b730 | 1796 | return bcp; |
1da177e4 | 1797 | } |
d5689eaa | 1798 | |
1da177e4 | 1799 | /* |
d5689eaa CH |
1800 | * We didn't find a corresponding entry in the table, so return 0 so |
1801 | * that the buffer is NOT cancelled. | |
1da177e4 | 1802 | */ |
c1155410 | 1803 | ASSERT(!(flags & XFS_BLF_CANCEL)); |
84a5b730 DC |
1804 | return NULL; |
1805 | } | |
1806 | ||
1807 | /* | |
1808 | * If the buffer is being cancelled then return 1 so that it will be cancelled, | |
1809 | * otherwise return 0. If the buffer is actually a buffer cancel item | |
1810 | * (XFS_BLF_CANCEL is set), then decrement the refcount on the entry in the | |
1811 | * table and remove it from the table if this is the last reference. | |
1812 | * | |
1813 | * We remove the cancel record from the table when we encounter its last | |
1814 | * occurrence in the log so that if the same buffer is re-used again after its | |
1815 | * last cancellation we actually replay the changes made at that point. | |
1816 | */ | |
1817 | STATIC int | |
1818 | xlog_check_buffer_cancelled( | |
1819 | struct xlog *log, | |
1820 | xfs_daddr_t blkno, | |
1821 | uint len, | |
1822 | ushort flags) | |
1823 | { | |
1824 | struct xfs_buf_cancel *bcp; | |
1825 | ||
1826 | bcp = xlog_peek_buffer_cancelled(log, blkno, len, flags); | |
1827 | if (!bcp) | |
1828 | return 0; | |
d5689eaa | 1829 | |
d5689eaa CH |
1830 | /* |
1831 | * We've go a match, so return 1 so that the recovery of this buffer | |
1832 | * is cancelled. If this buffer is actually a buffer cancel log | |
1833 | * item, then decrement the refcount on the one in the table and | |
1834 | * remove it if this is the last reference. | |
1835 | */ | |
1836 | if (flags & XFS_BLF_CANCEL) { | |
1837 | if (--bcp->bc_refcount == 0) { | |
1838 | list_del(&bcp->bc_list); | |
1839 | kmem_free(bcp); | |
1840 | } | |
1841 | } | |
1842 | return 1; | |
1da177e4 LT |
1843 | } |
1844 | ||
1da177e4 | 1845 | /* |
e2714bf8 CH |
1846 | * Perform recovery for a buffer full of inodes. In these buffers, the only |
1847 | * data which should be recovered is that which corresponds to the | |
1848 | * di_next_unlinked pointers in the on disk inode structures. The rest of the | |
1849 | * data for the inodes is always logged through the inodes themselves rather | |
1850 | * than the inode buffer and is recovered in xlog_recover_inode_pass2(). | |
1da177e4 | 1851 | * |
e2714bf8 CH |
1852 | * The only time when buffers full of inodes are fully recovered is when the |
1853 | * buffer is full of newly allocated inodes. In this case the buffer will | |
1854 | * not be marked as an inode buffer and so will be sent to | |
1855 | * xlog_recover_do_reg_buffer() below during recovery. | |
1da177e4 LT |
1856 | */ |
1857 | STATIC int | |
1858 | xlog_recover_do_inode_buffer( | |
e2714bf8 | 1859 | struct xfs_mount *mp, |
1da177e4 | 1860 | xlog_recover_item_t *item, |
e2714bf8 | 1861 | struct xfs_buf *bp, |
1da177e4 LT |
1862 | xfs_buf_log_format_t *buf_f) |
1863 | { | |
1864 | int i; | |
e2714bf8 CH |
1865 | int item_index = 0; |
1866 | int bit = 0; | |
1867 | int nbits = 0; | |
1868 | int reg_buf_offset = 0; | |
1869 | int reg_buf_bytes = 0; | |
1da177e4 LT |
1870 | int next_unlinked_offset; |
1871 | int inodes_per_buf; | |
1872 | xfs_agino_t *logged_nextp; | |
1873 | xfs_agino_t *buffer_nextp; | |
1da177e4 | 1874 | |
9abbc539 | 1875 | trace_xfs_log_recover_buf_inode_buf(mp->m_log, buf_f); |
9222a9cf DC |
1876 | |
1877 | /* | |
1878 | * Post recovery validation only works properly on CRC enabled | |
1879 | * filesystems. | |
1880 | */ | |
1881 | if (xfs_sb_version_hascrc(&mp->m_sb)) | |
1882 | bp->b_ops = &xfs_inode_buf_ops; | |
9abbc539 | 1883 | |
aa0e8833 | 1884 | inodes_per_buf = BBTOB(bp->b_io_length) >> mp->m_sb.sb_inodelog; |
1da177e4 LT |
1885 | for (i = 0; i < inodes_per_buf; i++) { |
1886 | next_unlinked_offset = (i * mp->m_sb.sb_inodesize) + | |
1887 | offsetof(xfs_dinode_t, di_next_unlinked); | |
1888 | ||
1889 | while (next_unlinked_offset >= | |
1890 | (reg_buf_offset + reg_buf_bytes)) { | |
1891 | /* | |
1892 | * The next di_next_unlinked field is beyond | |
1893 | * the current logged region. Find the next | |
1894 | * logged region that contains or is beyond | |
1895 | * the current di_next_unlinked field. | |
1896 | */ | |
1897 | bit += nbits; | |
e2714bf8 CH |
1898 | bit = xfs_next_bit(buf_f->blf_data_map, |
1899 | buf_f->blf_map_size, bit); | |
1da177e4 LT |
1900 | |
1901 | /* | |
1902 | * If there are no more logged regions in the | |
1903 | * buffer, then we're done. | |
1904 | */ | |
e2714bf8 | 1905 | if (bit == -1) |
1da177e4 | 1906 | return 0; |
1da177e4 | 1907 | |
e2714bf8 CH |
1908 | nbits = xfs_contig_bits(buf_f->blf_data_map, |
1909 | buf_f->blf_map_size, bit); | |
1da177e4 | 1910 | ASSERT(nbits > 0); |
c1155410 DC |
1911 | reg_buf_offset = bit << XFS_BLF_SHIFT; |
1912 | reg_buf_bytes = nbits << XFS_BLF_SHIFT; | |
1da177e4 LT |
1913 | item_index++; |
1914 | } | |
1915 | ||
1916 | /* | |
1917 | * If the current logged region starts after the current | |
1918 | * di_next_unlinked field, then move on to the next | |
1919 | * di_next_unlinked field. | |
1920 | */ | |
e2714bf8 | 1921 | if (next_unlinked_offset < reg_buf_offset) |
1da177e4 | 1922 | continue; |
1da177e4 LT |
1923 | |
1924 | ASSERT(item->ri_buf[item_index].i_addr != NULL); | |
c1155410 | 1925 | ASSERT((item->ri_buf[item_index].i_len % XFS_BLF_CHUNK) == 0); |
aa0e8833 DC |
1926 | ASSERT((reg_buf_offset + reg_buf_bytes) <= |
1927 | BBTOB(bp->b_io_length)); | |
1da177e4 LT |
1928 | |
1929 | /* | |
1930 | * The current logged region contains a copy of the | |
1931 | * current di_next_unlinked field. Extract its value | |
1932 | * and copy it to the buffer copy. | |
1933 | */ | |
4e0d5f92 CH |
1934 | logged_nextp = item->ri_buf[item_index].i_addr + |
1935 | next_unlinked_offset - reg_buf_offset; | |
1da177e4 | 1936 | if (unlikely(*logged_nextp == 0)) { |
a0fa2b67 DC |
1937 | xfs_alert(mp, |
1938 | "Bad inode buffer log record (ptr = 0x%p, bp = 0x%p). " | |
1939 | "Trying to replay bad (0) inode di_next_unlinked field.", | |
1da177e4 LT |
1940 | item, bp); |
1941 | XFS_ERROR_REPORT("xlog_recover_do_inode_buf", | |
1942 | XFS_ERRLEVEL_LOW, mp); | |
1943 | return XFS_ERROR(EFSCORRUPTED); | |
1944 | } | |
1945 | ||
1946 | buffer_nextp = (xfs_agino_t *)xfs_buf_offset(bp, | |
1947 | next_unlinked_offset); | |
87c199c2 | 1948 | *buffer_nextp = *logged_nextp; |
0a32c26e DC |
1949 | |
1950 | /* | |
1951 | * If necessary, recalculate the CRC in the on-disk inode. We | |
1952 | * have to leave the inode in a consistent state for whoever | |
1953 | * reads it next.... | |
1954 | */ | |
1955 | xfs_dinode_calc_crc(mp, (struct xfs_dinode *) | |
1956 | xfs_buf_offset(bp, i * mp->m_sb.sb_inodesize)); | |
1957 | ||
1da177e4 LT |
1958 | } |
1959 | ||
1960 | return 0; | |
1961 | } | |
1962 | ||
50d5c8d8 DC |
1963 | /* |
1964 | * V5 filesystems know the age of the buffer on disk being recovered. We can | |
1965 | * have newer objects on disk than we are replaying, and so for these cases we | |
1966 | * don't want to replay the current change as that will make the buffer contents | |
1967 | * temporarily invalid on disk. | |
1968 | * | |
1969 | * The magic number might not match the buffer type we are going to recover | |
1970 | * (e.g. reallocated blocks), so we ignore the xfs_buf_log_format flags. Hence | |
1971 | * extract the LSN of the existing object in the buffer based on it's current | |
1972 | * magic number. If we don't recognise the magic number in the buffer, then | |
1973 | * return a LSN of -1 so that the caller knows it was an unrecognised block and | |
1974 | * so can recover the buffer. | |
566055d3 DC |
1975 | * |
1976 | * Note: we cannot rely solely on magic number matches to determine that the | |
1977 | * buffer has a valid LSN - we also need to verify that it belongs to this | |
1978 | * filesystem, so we need to extract the object's LSN and compare it to that | |
1979 | * which we read from the superblock. If the UUIDs don't match, then we've got a | |
1980 | * stale metadata block from an old filesystem instance that we need to recover | |
1981 | * over the top of. | |
50d5c8d8 DC |
1982 | */ |
1983 | static xfs_lsn_t | |
1984 | xlog_recover_get_buf_lsn( | |
1985 | struct xfs_mount *mp, | |
1986 | struct xfs_buf *bp) | |
1987 | { | |
1988 | __uint32_t magic32; | |
1989 | __uint16_t magic16; | |
1990 | __uint16_t magicda; | |
1991 | void *blk = bp->b_addr; | |
566055d3 DC |
1992 | uuid_t *uuid; |
1993 | xfs_lsn_t lsn = -1; | |
50d5c8d8 DC |
1994 | |
1995 | /* v4 filesystems always recover immediately */ | |
1996 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
1997 | goto recover_immediately; | |
1998 | ||
1999 | magic32 = be32_to_cpu(*(__be32 *)blk); | |
2000 | switch (magic32) { | |
2001 | case XFS_ABTB_CRC_MAGIC: | |
2002 | case XFS_ABTC_CRC_MAGIC: | |
2003 | case XFS_ABTB_MAGIC: | |
2004 | case XFS_ABTC_MAGIC: | |
2005 | case XFS_IBT_CRC_MAGIC: | |
566055d3 DC |
2006 | case XFS_IBT_MAGIC: { |
2007 | struct xfs_btree_block *btb = blk; | |
2008 | ||
2009 | lsn = be64_to_cpu(btb->bb_u.s.bb_lsn); | |
2010 | uuid = &btb->bb_u.s.bb_uuid; | |
2011 | break; | |
2012 | } | |
50d5c8d8 | 2013 | case XFS_BMAP_CRC_MAGIC: |
566055d3 DC |
2014 | case XFS_BMAP_MAGIC: { |
2015 | struct xfs_btree_block *btb = blk; | |
2016 | ||
2017 | lsn = be64_to_cpu(btb->bb_u.l.bb_lsn); | |
2018 | uuid = &btb->bb_u.l.bb_uuid; | |
2019 | break; | |
2020 | } | |
50d5c8d8 | 2021 | case XFS_AGF_MAGIC: |
566055d3 DC |
2022 | lsn = be64_to_cpu(((struct xfs_agf *)blk)->agf_lsn); |
2023 | uuid = &((struct xfs_agf *)blk)->agf_uuid; | |
2024 | break; | |
50d5c8d8 | 2025 | case XFS_AGFL_MAGIC: |
566055d3 DC |
2026 | lsn = be64_to_cpu(((struct xfs_agfl *)blk)->agfl_lsn); |
2027 | uuid = &((struct xfs_agfl *)blk)->agfl_uuid; | |
2028 | break; | |
50d5c8d8 | 2029 | case XFS_AGI_MAGIC: |
566055d3 DC |
2030 | lsn = be64_to_cpu(((struct xfs_agi *)blk)->agi_lsn); |
2031 | uuid = &((struct xfs_agi *)blk)->agi_uuid; | |
2032 | break; | |
50d5c8d8 | 2033 | case XFS_SYMLINK_MAGIC: |
566055d3 DC |
2034 | lsn = be64_to_cpu(((struct xfs_dsymlink_hdr *)blk)->sl_lsn); |
2035 | uuid = &((struct xfs_dsymlink_hdr *)blk)->sl_uuid; | |
2036 | break; | |
50d5c8d8 DC |
2037 | case XFS_DIR3_BLOCK_MAGIC: |
2038 | case XFS_DIR3_DATA_MAGIC: | |
2039 | case XFS_DIR3_FREE_MAGIC: | |
566055d3 DC |
2040 | lsn = be64_to_cpu(((struct xfs_dir3_blk_hdr *)blk)->lsn); |
2041 | uuid = &((struct xfs_dir3_blk_hdr *)blk)->uuid; | |
2042 | break; | |
50d5c8d8 | 2043 | case XFS_ATTR3_RMT_MAGIC: |
566055d3 DC |
2044 | lsn = be64_to_cpu(((struct xfs_attr3_rmt_hdr *)blk)->rm_lsn); |
2045 | uuid = &((struct xfs_attr3_rmt_hdr *)blk)->rm_uuid; | |
2046 | break; | |
50d5c8d8 | 2047 | case XFS_SB_MAGIC: |
566055d3 DC |
2048 | lsn = be64_to_cpu(((struct xfs_dsb *)blk)->sb_lsn); |
2049 | uuid = &((struct xfs_dsb *)blk)->sb_uuid; | |
2050 | break; | |
50d5c8d8 DC |
2051 | default: |
2052 | break; | |
2053 | } | |
2054 | ||
566055d3 DC |
2055 | if (lsn != (xfs_lsn_t)-1) { |
2056 | if (!uuid_equal(&mp->m_sb.sb_uuid, uuid)) | |
2057 | goto recover_immediately; | |
2058 | return lsn; | |
2059 | } | |
2060 | ||
50d5c8d8 DC |
2061 | magicda = be16_to_cpu(((struct xfs_da_blkinfo *)blk)->magic); |
2062 | switch (magicda) { | |
2063 | case XFS_DIR3_LEAF1_MAGIC: | |
2064 | case XFS_DIR3_LEAFN_MAGIC: | |
2065 | case XFS_DA3_NODE_MAGIC: | |
566055d3 DC |
2066 | lsn = be64_to_cpu(((struct xfs_da3_blkinfo *)blk)->lsn); |
2067 | uuid = &((struct xfs_da3_blkinfo *)blk)->uuid; | |
2068 | break; | |
50d5c8d8 DC |
2069 | default: |
2070 | break; | |
2071 | } | |
2072 | ||
566055d3 DC |
2073 | if (lsn != (xfs_lsn_t)-1) { |
2074 | if (!uuid_equal(&mp->m_sb.sb_uuid, uuid)) | |
2075 | goto recover_immediately; | |
2076 | return lsn; | |
2077 | } | |
2078 | ||
50d5c8d8 DC |
2079 | /* |
2080 | * We do individual object checks on dquot and inode buffers as they | |
2081 | * have their own individual LSN records. Also, we could have a stale | |
2082 | * buffer here, so we have to at least recognise these buffer types. | |
2083 | * | |
2084 | * A notd complexity here is inode unlinked list processing - it logs | |
2085 | * the inode directly in the buffer, but we don't know which inodes have | |
2086 | * been modified, and there is no global buffer LSN. Hence we need to | |
2087 | * recover all inode buffer types immediately. This problem will be | |
2088 | * fixed by logical logging of the unlinked list modifications. | |
2089 | */ | |
2090 | magic16 = be16_to_cpu(*(__be16 *)blk); | |
2091 | switch (magic16) { | |
2092 | case XFS_DQUOT_MAGIC: | |
2093 | case XFS_DINODE_MAGIC: | |
2094 | goto recover_immediately; | |
2095 | default: | |
2096 | break; | |
2097 | } | |
2098 | ||
2099 | /* unknown buffer contents, recover immediately */ | |
2100 | ||
2101 | recover_immediately: | |
2102 | return (xfs_lsn_t)-1; | |
2103 | ||
2104 | } | |
2105 | ||
1da177e4 | 2106 | /* |
d75afeb3 DC |
2107 | * Validate the recovered buffer is of the correct type and attach the |
2108 | * appropriate buffer operations to them for writeback. Magic numbers are in a | |
2109 | * few places: | |
2110 | * the first 16 bits of the buffer (inode buffer, dquot buffer), | |
2111 | * the first 32 bits of the buffer (most blocks), | |
2112 | * inside a struct xfs_da_blkinfo at the start of the buffer. | |
1da177e4 | 2113 | */ |
d75afeb3 | 2114 | static void |
50d5c8d8 | 2115 | xlog_recover_validate_buf_type( |
9abbc539 | 2116 | struct xfs_mount *mp, |
e2714bf8 | 2117 | struct xfs_buf *bp, |
1da177e4 LT |
2118 | xfs_buf_log_format_t *buf_f) |
2119 | { | |
d75afeb3 DC |
2120 | struct xfs_da_blkinfo *info = bp->b_addr; |
2121 | __uint32_t magic32; | |
2122 | __uint16_t magic16; | |
2123 | __uint16_t magicda; | |
2124 | ||
2125 | magic32 = be32_to_cpu(*(__be32 *)bp->b_addr); | |
2126 | magic16 = be16_to_cpu(*(__be16*)bp->b_addr); | |
2127 | magicda = be16_to_cpu(info->magic); | |
61fe135c DC |
2128 | switch (xfs_blft_from_flags(buf_f)) { |
2129 | case XFS_BLFT_BTREE_BUF: | |
d75afeb3 | 2130 | switch (magic32) { |
ee1a47ab CH |
2131 | case XFS_ABTB_CRC_MAGIC: |
2132 | case XFS_ABTC_CRC_MAGIC: | |
2133 | case XFS_ABTB_MAGIC: | |
2134 | case XFS_ABTC_MAGIC: | |
2135 | bp->b_ops = &xfs_allocbt_buf_ops; | |
2136 | break; | |
2137 | case XFS_IBT_CRC_MAGIC: | |
2138 | case XFS_IBT_MAGIC: | |
2139 | bp->b_ops = &xfs_inobt_buf_ops; | |
2140 | break; | |
2141 | case XFS_BMAP_CRC_MAGIC: | |
2142 | case XFS_BMAP_MAGIC: | |
2143 | bp->b_ops = &xfs_bmbt_buf_ops; | |
2144 | break; | |
2145 | default: | |
2146 | xfs_warn(mp, "Bad btree block magic!"); | |
2147 | ASSERT(0); | |
2148 | break; | |
2149 | } | |
2150 | break; | |
61fe135c | 2151 | case XFS_BLFT_AGF_BUF: |
d75afeb3 | 2152 | if (magic32 != XFS_AGF_MAGIC) { |
4e0e6040 DC |
2153 | xfs_warn(mp, "Bad AGF block magic!"); |
2154 | ASSERT(0); | |
2155 | break; | |
2156 | } | |
2157 | bp->b_ops = &xfs_agf_buf_ops; | |
2158 | break; | |
61fe135c | 2159 | case XFS_BLFT_AGFL_BUF: |
77c95bba CH |
2160 | if (!xfs_sb_version_hascrc(&mp->m_sb)) |
2161 | break; | |
d75afeb3 | 2162 | if (magic32 != XFS_AGFL_MAGIC) { |
77c95bba CH |
2163 | xfs_warn(mp, "Bad AGFL block magic!"); |
2164 | ASSERT(0); | |
2165 | break; | |
2166 | } | |
2167 | bp->b_ops = &xfs_agfl_buf_ops; | |
2168 | break; | |
61fe135c | 2169 | case XFS_BLFT_AGI_BUF: |
d75afeb3 | 2170 | if (magic32 != XFS_AGI_MAGIC) { |
983d09ff DC |
2171 | xfs_warn(mp, "Bad AGI block magic!"); |
2172 | ASSERT(0); | |
2173 | break; | |
2174 | } | |
2175 | bp->b_ops = &xfs_agi_buf_ops; | |
2176 | break; | |
61fe135c DC |
2177 | case XFS_BLFT_UDQUOT_BUF: |
2178 | case XFS_BLFT_PDQUOT_BUF: | |
2179 | case XFS_BLFT_GDQUOT_BUF: | |
123887e8 | 2180 | #ifdef CONFIG_XFS_QUOTA |
d75afeb3 | 2181 | if (magic16 != XFS_DQUOT_MAGIC) { |
3fe58f30 CH |
2182 | xfs_warn(mp, "Bad DQUOT block magic!"); |
2183 | ASSERT(0); | |
2184 | break; | |
2185 | } | |
2186 | bp->b_ops = &xfs_dquot_buf_ops; | |
123887e8 DC |
2187 | #else |
2188 | xfs_alert(mp, | |
2189 | "Trying to recover dquots without QUOTA support built in!"); | |
2190 | ASSERT(0); | |
2191 | #endif | |
3fe58f30 | 2192 | break; |
61fe135c | 2193 | case XFS_BLFT_DINO_BUF: |
93848a99 CH |
2194 | /* |
2195 | * we get here with inode allocation buffers, not buffers that | |
2196 | * track unlinked list changes. | |
2197 | */ | |
d75afeb3 | 2198 | if (magic16 != XFS_DINODE_MAGIC) { |
93848a99 CH |
2199 | xfs_warn(mp, "Bad INODE block magic!"); |
2200 | ASSERT(0); | |
2201 | break; | |
2202 | } | |
2203 | bp->b_ops = &xfs_inode_buf_ops; | |
2204 | break; | |
61fe135c | 2205 | case XFS_BLFT_SYMLINK_BUF: |
d75afeb3 | 2206 | if (magic32 != XFS_SYMLINK_MAGIC) { |
f948dd76 DC |
2207 | xfs_warn(mp, "Bad symlink block magic!"); |
2208 | ASSERT(0); | |
2209 | break; | |
2210 | } | |
2211 | bp->b_ops = &xfs_symlink_buf_ops; | |
2212 | break; | |
61fe135c | 2213 | case XFS_BLFT_DIR_BLOCK_BUF: |
d75afeb3 DC |
2214 | if (magic32 != XFS_DIR2_BLOCK_MAGIC && |
2215 | magic32 != XFS_DIR3_BLOCK_MAGIC) { | |
2216 | xfs_warn(mp, "Bad dir block magic!"); | |
2217 | ASSERT(0); | |
2218 | break; | |
2219 | } | |
2220 | bp->b_ops = &xfs_dir3_block_buf_ops; | |
2221 | break; | |
61fe135c | 2222 | case XFS_BLFT_DIR_DATA_BUF: |
d75afeb3 DC |
2223 | if (magic32 != XFS_DIR2_DATA_MAGIC && |
2224 | magic32 != XFS_DIR3_DATA_MAGIC) { | |
2225 | xfs_warn(mp, "Bad dir data magic!"); | |
2226 | ASSERT(0); | |
2227 | break; | |
2228 | } | |
2229 | bp->b_ops = &xfs_dir3_data_buf_ops; | |
2230 | break; | |
61fe135c | 2231 | case XFS_BLFT_DIR_FREE_BUF: |
d75afeb3 DC |
2232 | if (magic32 != XFS_DIR2_FREE_MAGIC && |
2233 | magic32 != XFS_DIR3_FREE_MAGIC) { | |
2234 | xfs_warn(mp, "Bad dir3 free magic!"); | |
2235 | ASSERT(0); | |
2236 | break; | |
2237 | } | |
2238 | bp->b_ops = &xfs_dir3_free_buf_ops; | |
2239 | break; | |
61fe135c | 2240 | case XFS_BLFT_DIR_LEAF1_BUF: |
d75afeb3 DC |
2241 | if (magicda != XFS_DIR2_LEAF1_MAGIC && |
2242 | magicda != XFS_DIR3_LEAF1_MAGIC) { | |
2243 | xfs_warn(mp, "Bad dir leaf1 magic!"); | |
2244 | ASSERT(0); | |
2245 | break; | |
2246 | } | |
2247 | bp->b_ops = &xfs_dir3_leaf1_buf_ops; | |
2248 | break; | |
61fe135c | 2249 | case XFS_BLFT_DIR_LEAFN_BUF: |
d75afeb3 DC |
2250 | if (magicda != XFS_DIR2_LEAFN_MAGIC && |
2251 | magicda != XFS_DIR3_LEAFN_MAGIC) { | |
2252 | xfs_warn(mp, "Bad dir leafn magic!"); | |
2253 | ASSERT(0); | |
2254 | break; | |
2255 | } | |
2256 | bp->b_ops = &xfs_dir3_leafn_buf_ops; | |
2257 | break; | |
61fe135c | 2258 | case XFS_BLFT_DA_NODE_BUF: |
d75afeb3 DC |
2259 | if (magicda != XFS_DA_NODE_MAGIC && |
2260 | magicda != XFS_DA3_NODE_MAGIC) { | |
2261 | xfs_warn(mp, "Bad da node magic!"); | |
2262 | ASSERT(0); | |
2263 | break; | |
2264 | } | |
2265 | bp->b_ops = &xfs_da3_node_buf_ops; | |
2266 | break; | |
61fe135c | 2267 | case XFS_BLFT_ATTR_LEAF_BUF: |
d75afeb3 DC |
2268 | if (magicda != XFS_ATTR_LEAF_MAGIC && |
2269 | magicda != XFS_ATTR3_LEAF_MAGIC) { | |
2270 | xfs_warn(mp, "Bad attr leaf magic!"); | |
2271 | ASSERT(0); | |
2272 | break; | |
2273 | } | |
2274 | bp->b_ops = &xfs_attr3_leaf_buf_ops; | |
2275 | break; | |
61fe135c | 2276 | case XFS_BLFT_ATTR_RMT_BUF: |
d75afeb3 DC |
2277 | if (!xfs_sb_version_hascrc(&mp->m_sb)) |
2278 | break; | |
cab09a81 | 2279 | if (magic32 != XFS_ATTR3_RMT_MAGIC) { |
d75afeb3 DC |
2280 | xfs_warn(mp, "Bad attr remote magic!"); |
2281 | ASSERT(0); | |
2282 | break; | |
2283 | } | |
2284 | bp->b_ops = &xfs_attr3_rmt_buf_ops; | |
2285 | break; | |
04a1e6c5 DC |
2286 | case XFS_BLFT_SB_BUF: |
2287 | if (magic32 != XFS_SB_MAGIC) { | |
2288 | xfs_warn(mp, "Bad SB block magic!"); | |
2289 | ASSERT(0); | |
2290 | break; | |
2291 | } | |
2292 | bp->b_ops = &xfs_sb_buf_ops; | |
2293 | break; | |
ee1a47ab | 2294 | default: |
61fe135c DC |
2295 | xfs_warn(mp, "Unknown buffer type %d!", |
2296 | xfs_blft_from_flags(buf_f)); | |
ee1a47ab CH |
2297 | break; |
2298 | } | |
1da177e4 LT |
2299 | } |
2300 | ||
d75afeb3 DC |
2301 | /* |
2302 | * Perform a 'normal' buffer recovery. Each logged region of the | |
2303 | * buffer should be copied over the corresponding region in the | |
2304 | * given buffer. The bitmap in the buf log format structure indicates | |
2305 | * where to place the logged data. | |
2306 | */ | |
2307 | STATIC void | |
2308 | xlog_recover_do_reg_buffer( | |
2309 | struct xfs_mount *mp, | |
2310 | xlog_recover_item_t *item, | |
2311 | struct xfs_buf *bp, | |
2312 | xfs_buf_log_format_t *buf_f) | |
2313 | { | |
2314 | int i; | |
2315 | int bit; | |
2316 | int nbits; | |
2317 | int error; | |
2318 | ||
2319 | trace_xfs_log_recover_buf_reg_buf(mp->m_log, buf_f); | |
2320 | ||
2321 | bit = 0; | |
2322 | i = 1; /* 0 is the buf format structure */ | |
2323 | while (1) { | |
2324 | bit = xfs_next_bit(buf_f->blf_data_map, | |
2325 | buf_f->blf_map_size, bit); | |
2326 | if (bit == -1) | |
2327 | break; | |
2328 | nbits = xfs_contig_bits(buf_f->blf_data_map, | |
2329 | buf_f->blf_map_size, bit); | |
2330 | ASSERT(nbits > 0); | |
2331 | ASSERT(item->ri_buf[i].i_addr != NULL); | |
2332 | ASSERT(item->ri_buf[i].i_len % XFS_BLF_CHUNK == 0); | |
2333 | ASSERT(BBTOB(bp->b_io_length) >= | |
2334 | ((uint)bit << XFS_BLF_SHIFT) + (nbits << XFS_BLF_SHIFT)); | |
2335 | ||
709da6a6 DC |
2336 | /* |
2337 | * The dirty regions logged in the buffer, even though | |
2338 | * contiguous, may span multiple chunks. This is because the | |
2339 | * dirty region may span a physical page boundary in a buffer | |
2340 | * and hence be split into two separate vectors for writing into | |
2341 | * the log. Hence we need to trim nbits back to the length of | |
2342 | * the current region being copied out of the log. | |
2343 | */ | |
2344 | if (item->ri_buf[i].i_len < (nbits << XFS_BLF_SHIFT)) | |
2345 | nbits = item->ri_buf[i].i_len >> XFS_BLF_SHIFT; | |
2346 | ||
d75afeb3 DC |
2347 | /* |
2348 | * Do a sanity check if this is a dquot buffer. Just checking | |
2349 | * the first dquot in the buffer should do. XXXThis is | |
2350 | * probably a good thing to do for other buf types also. | |
2351 | */ | |
2352 | error = 0; | |
2353 | if (buf_f->blf_flags & | |
2354 | (XFS_BLF_UDQUOT_BUF|XFS_BLF_PDQUOT_BUF|XFS_BLF_GDQUOT_BUF)) { | |
2355 | if (item->ri_buf[i].i_addr == NULL) { | |
2356 | xfs_alert(mp, | |
2357 | "XFS: NULL dquot in %s.", __func__); | |
2358 | goto next; | |
2359 | } | |
2360 | if (item->ri_buf[i].i_len < sizeof(xfs_disk_dquot_t)) { | |
2361 | xfs_alert(mp, | |
2362 | "XFS: dquot too small (%d) in %s.", | |
2363 | item->ri_buf[i].i_len, __func__); | |
2364 | goto next; | |
2365 | } | |
9aede1d8 | 2366 | error = xfs_dqcheck(mp, item->ri_buf[i].i_addr, |
d75afeb3 DC |
2367 | -1, 0, XFS_QMOPT_DOWARN, |
2368 | "dquot_buf_recover"); | |
2369 | if (error) | |
2370 | goto next; | |
2371 | } | |
2372 | ||
2373 | memcpy(xfs_buf_offset(bp, | |
2374 | (uint)bit << XFS_BLF_SHIFT), /* dest */ | |
2375 | item->ri_buf[i].i_addr, /* source */ | |
2376 | nbits<<XFS_BLF_SHIFT); /* length */ | |
2377 | next: | |
2378 | i++; | |
2379 | bit += nbits; | |
2380 | } | |
2381 | ||
2382 | /* Shouldn't be any more regions */ | |
2383 | ASSERT(i == item->ri_total); | |
2384 | ||
9222a9cf DC |
2385 | /* |
2386 | * We can only do post recovery validation on items on CRC enabled | |
2387 | * fielsystems as we need to know when the buffer was written to be able | |
2388 | * to determine if we should have replayed the item. If we replay old | |
2389 | * metadata over a newer buffer, then it will enter a temporarily | |
2390 | * inconsistent state resulting in verification failures. Hence for now | |
2391 | * just avoid the verification stage for non-crc filesystems | |
2392 | */ | |
2393 | if (xfs_sb_version_hascrc(&mp->m_sb)) | |
50d5c8d8 | 2394 | xlog_recover_validate_buf_type(mp, bp, buf_f); |
d75afeb3 DC |
2395 | } |
2396 | ||
1da177e4 LT |
2397 | /* |
2398 | * Perform a dquot buffer recovery. | |
8ba701ee | 2399 | * Simple algorithm: if we have found a QUOTAOFF log item of the same type |
1da177e4 LT |
2400 | * (ie. USR or GRP), then just toss this buffer away; don't recover it. |
2401 | * Else, treat it as a regular buffer and do recovery. | |
2402 | */ | |
2403 | STATIC void | |
2404 | xlog_recover_do_dquot_buffer( | |
9a8d2fdb MT |
2405 | struct xfs_mount *mp, |
2406 | struct xlog *log, | |
2407 | struct xlog_recover_item *item, | |
2408 | struct xfs_buf *bp, | |
2409 | struct xfs_buf_log_format *buf_f) | |
1da177e4 LT |
2410 | { |
2411 | uint type; | |
2412 | ||
9abbc539 DC |
2413 | trace_xfs_log_recover_buf_dquot_buf(log, buf_f); |
2414 | ||
1da177e4 LT |
2415 | /* |
2416 | * Filesystems are required to send in quota flags at mount time. | |
2417 | */ | |
2418 | if (mp->m_qflags == 0) { | |
2419 | return; | |
2420 | } | |
2421 | ||
2422 | type = 0; | |
c1155410 | 2423 | if (buf_f->blf_flags & XFS_BLF_UDQUOT_BUF) |
1da177e4 | 2424 | type |= XFS_DQ_USER; |
c1155410 | 2425 | if (buf_f->blf_flags & XFS_BLF_PDQUOT_BUF) |
c8ad20ff | 2426 | type |= XFS_DQ_PROJ; |
c1155410 | 2427 | if (buf_f->blf_flags & XFS_BLF_GDQUOT_BUF) |
1da177e4 LT |
2428 | type |= XFS_DQ_GROUP; |
2429 | /* | |
2430 | * This type of quotas was turned off, so ignore this buffer | |
2431 | */ | |
2432 | if (log->l_quotaoffs_flag & type) | |
2433 | return; | |
2434 | ||
9abbc539 | 2435 | xlog_recover_do_reg_buffer(mp, item, bp, buf_f); |
1da177e4 LT |
2436 | } |
2437 | ||
2438 | /* | |
2439 | * This routine replays a modification made to a buffer at runtime. | |
2440 | * There are actually two types of buffer, regular and inode, which | |
2441 | * are handled differently. Inode buffers are handled differently | |
2442 | * in that we only recover a specific set of data from them, namely | |
2443 | * the inode di_next_unlinked fields. This is because all other inode | |
2444 | * data is actually logged via inode records and any data we replay | |
2445 | * here which overlaps that may be stale. | |
2446 | * | |
2447 | * When meta-data buffers are freed at run time we log a buffer item | |
c1155410 | 2448 | * with the XFS_BLF_CANCEL bit set to indicate that previous copies |
1da177e4 LT |
2449 | * of the buffer in the log should not be replayed at recovery time. |
2450 | * This is so that if the blocks covered by the buffer are reused for | |
2451 | * file data before we crash we don't end up replaying old, freed | |
2452 | * meta-data into a user's file. | |
2453 | * | |
2454 | * To handle the cancellation of buffer log items, we make two passes | |
2455 | * over the log during recovery. During the first we build a table of | |
2456 | * those buffers which have been cancelled, and during the second we | |
2457 | * only replay those buffers which do not have corresponding cancel | |
34be5ff3 | 2458 | * records in the table. See xlog_recover_buffer_pass[1,2] above |
1da177e4 LT |
2459 | * for more details on the implementation of the table of cancel records. |
2460 | */ | |
2461 | STATIC int | |
c9f71f5f | 2462 | xlog_recover_buffer_pass2( |
9a8d2fdb MT |
2463 | struct xlog *log, |
2464 | struct list_head *buffer_list, | |
50d5c8d8 DC |
2465 | struct xlog_recover_item *item, |
2466 | xfs_lsn_t current_lsn) | |
1da177e4 | 2467 | { |
4e0d5f92 | 2468 | xfs_buf_log_format_t *buf_f = item->ri_buf[0].i_addr; |
e2714bf8 | 2469 | xfs_mount_t *mp = log->l_mp; |
1da177e4 LT |
2470 | xfs_buf_t *bp; |
2471 | int error; | |
6ad112bf | 2472 | uint buf_flags; |
50d5c8d8 | 2473 | xfs_lsn_t lsn; |
1da177e4 | 2474 | |
c9f71f5f CH |
2475 | /* |
2476 | * In this pass we only want to recover all the buffers which have | |
2477 | * not been cancelled and are not cancellation buffers themselves. | |
2478 | */ | |
2479 | if (xlog_check_buffer_cancelled(log, buf_f->blf_blkno, | |
2480 | buf_f->blf_len, buf_f->blf_flags)) { | |
2481 | trace_xfs_log_recover_buf_cancel(log, buf_f); | |
1da177e4 | 2482 | return 0; |
1da177e4 | 2483 | } |
c9f71f5f | 2484 | |
9abbc539 | 2485 | trace_xfs_log_recover_buf_recover(log, buf_f); |
1da177e4 | 2486 | |
a8acad70 | 2487 | buf_flags = 0; |
611c9946 DC |
2488 | if (buf_f->blf_flags & XFS_BLF_INODE_BUF) |
2489 | buf_flags |= XBF_UNMAPPED; | |
6ad112bf | 2490 | |
e2714bf8 | 2491 | bp = xfs_buf_read(mp->m_ddev_targp, buf_f->blf_blkno, buf_f->blf_len, |
c3f8fc73 | 2492 | buf_flags, NULL); |
ac4d6888 CS |
2493 | if (!bp) |
2494 | return XFS_ERROR(ENOMEM); | |
e5702805 | 2495 | error = bp->b_error; |
5a52c2a5 | 2496 | if (error) { |
901796af | 2497 | xfs_buf_ioerror_alert(bp, "xlog_recover_do..(read#1)"); |
50d5c8d8 | 2498 | goto out_release; |
1da177e4 LT |
2499 | } |
2500 | ||
50d5c8d8 DC |
2501 | /* |
2502 | * recover the buffer only if we get an LSN from it and it's less than | |
2503 | * the lsn of the transaction we are replaying. | |
2504 | */ | |
2505 | lsn = xlog_recover_get_buf_lsn(mp, bp); | |
2506 | if (lsn && lsn != -1 && XFS_LSN_CMP(lsn, current_lsn) >= 0) | |
2507 | goto out_release; | |
2508 | ||
e2714bf8 | 2509 | if (buf_f->blf_flags & XFS_BLF_INODE_BUF) { |
1da177e4 | 2510 | error = xlog_recover_do_inode_buffer(mp, item, bp, buf_f); |
e2714bf8 | 2511 | } else if (buf_f->blf_flags & |
c1155410 | 2512 | (XFS_BLF_UDQUOT_BUF|XFS_BLF_PDQUOT_BUF|XFS_BLF_GDQUOT_BUF)) { |
1da177e4 LT |
2513 | xlog_recover_do_dquot_buffer(mp, log, item, bp, buf_f); |
2514 | } else { | |
9abbc539 | 2515 | xlog_recover_do_reg_buffer(mp, item, bp, buf_f); |
1da177e4 LT |
2516 | } |
2517 | if (error) | |
50d5c8d8 | 2518 | goto out_release; |
1da177e4 LT |
2519 | |
2520 | /* | |
2521 | * Perform delayed write on the buffer. Asynchronous writes will be | |
2522 | * slower when taking into account all the buffers to be flushed. | |
2523 | * | |
2524 | * Also make sure that only inode buffers with good sizes stay in | |
2525 | * the buffer cache. The kernel moves inodes in buffers of 1 block | |
2526 | * or XFS_INODE_CLUSTER_SIZE bytes, whichever is bigger. The inode | |
2527 | * buffers in the log can be a different size if the log was generated | |
2528 | * by an older kernel using unclustered inode buffers or a newer kernel | |
2529 | * running with a different inode cluster size. Regardless, if the | |
2530 | * the inode buffer size isn't MAX(blocksize, XFS_INODE_CLUSTER_SIZE) | |
2531 | * for *our* value of XFS_INODE_CLUSTER_SIZE, then we need to keep | |
2532 | * the buffer out of the buffer cache so that the buffer won't | |
2533 | * overlap with future reads of those inodes. | |
2534 | */ | |
2535 | if (XFS_DINODE_MAGIC == | |
b53e675d | 2536 | be16_to_cpu(*((__be16 *)xfs_buf_offset(bp, 0))) && |
aa0e8833 | 2537 | (BBTOB(bp->b_io_length) != MAX(log->l_mp->m_sb.sb_blocksize, |
1da177e4 | 2538 | (__uint32_t)XFS_INODE_CLUSTER_SIZE(log->l_mp)))) { |
c867cb61 | 2539 | xfs_buf_stale(bp); |
c2b006c1 | 2540 | error = xfs_bwrite(bp); |
1da177e4 | 2541 | } else { |
ebad861b | 2542 | ASSERT(bp->b_target->bt_mount == mp); |
cb669ca5 | 2543 | bp->b_iodone = xlog_recover_iodone; |
43ff2122 | 2544 | xfs_buf_delwri_queue(bp, buffer_list); |
1da177e4 LT |
2545 | } |
2546 | ||
50d5c8d8 | 2547 | out_release: |
c2b006c1 CH |
2548 | xfs_buf_relse(bp); |
2549 | return error; | |
1da177e4 LT |
2550 | } |
2551 | ||
638f4416 DC |
2552 | /* |
2553 | * Inode fork owner changes | |
2554 | * | |
2555 | * If we have been told that we have to reparent the inode fork, it's because an | |
2556 | * extent swap operation on a CRC enabled filesystem has been done and we are | |
2557 | * replaying it. We need to walk the BMBT of the appropriate fork and change the | |
2558 | * owners of it. | |
2559 | * | |
2560 | * The complexity here is that we don't have an inode context to work with, so | |
2561 | * after we've replayed the inode we need to instantiate one. This is where the | |
2562 | * fun begins. | |
2563 | * | |
2564 | * We are in the middle of log recovery, so we can't run transactions. That | |
2565 | * means we cannot use cache coherent inode instantiation via xfs_iget(), as | |
2566 | * that will result in the corresponding iput() running the inode through | |
2567 | * xfs_inactive(). If we've just replayed an inode core that changes the link | |
2568 | * count to zero (i.e. it's been unlinked), then xfs_inactive() will run | |
2569 | * transactions (bad!). | |
2570 | * | |
2571 | * So, to avoid this, we instantiate an inode directly from the inode core we've | |
2572 | * just recovered. We have the buffer still locked, and all we really need to | |
2573 | * instantiate is the inode core and the forks being modified. We can do this | |
2574 | * manually, then run the inode btree owner change, and then tear down the | |
2575 | * xfs_inode without having to run any transactions at all. | |
2576 | * | |
2577 | * Also, because we don't have a transaction context available here but need to | |
2578 | * gather all the buffers we modify for writeback so we pass the buffer_list | |
2579 | * instead for the operation to use. | |
2580 | */ | |
2581 | ||
2582 | STATIC int | |
2583 | xfs_recover_inode_owner_change( | |
2584 | struct xfs_mount *mp, | |
2585 | struct xfs_dinode *dip, | |
2586 | struct xfs_inode_log_format *in_f, | |
2587 | struct list_head *buffer_list) | |
2588 | { | |
2589 | struct xfs_inode *ip; | |
2590 | int error; | |
2591 | ||
2592 | ASSERT(in_f->ilf_fields & (XFS_ILOG_DOWNER|XFS_ILOG_AOWNER)); | |
2593 | ||
2594 | ip = xfs_inode_alloc(mp, in_f->ilf_ino); | |
2595 | if (!ip) | |
2596 | return ENOMEM; | |
2597 | ||
2598 | /* instantiate the inode */ | |
2599 | xfs_dinode_from_disk(&ip->i_d, dip); | |
2600 | ASSERT(ip->i_d.di_version >= 3); | |
2601 | ||
2602 | error = xfs_iformat_fork(ip, dip); | |
2603 | if (error) | |
2604 | goto out_free_ip; | |
2605 | ||
2606 | ||
2607 | if (in_f->ilf_fields & XFS_ILOG_DOWNER) { | |
2608 | ASSERT(in_f->ilf_fields & XFS_ILOG_DBROOT); | |
2609 | error = xfs_bmbt_change_owner(NULL, ip, XFS_DATA_FORK, | |
2610 | ip->i_ino, buffer_list); | |
2611 | if (error) | |
2612 | goto out_free_ip; | |
2613 | } | |
2614 | ||
2615 | if (in_f->ilf_fields & XFS_ILOG_AOWNER) { | |
2616 | ASSERT(in_f->ilf_fields & XFS_ILOG_ABROOT); | |
2617 | error = xfs_bmbt_change_owner(NULL, ip, XFS_ATTR_FORK, | |
2618 | ip->i_ino, buffer_list); | |
2619 | if (error) | |
2620 | goto out_free_ip; | |
2621 | } | |
2622 | ||
2623 | out_free_ip: | |
2624 | xfs_inode_free(ip); | |
2625 | return error; | |
2626 | } | |
2627 | ||
1da177e4 | 2628 | STATIC int |
c9f71f5f | 2629 | xlog_recover_inode_pass2( |
9a8d2fdb MT |
2630 | struct xlog *log, |
2631 | struct list_head *buffer_list, | |
50d5c8d8 DC |
2632 | struct xlog_recover_item *item, |
2633 | xfs_lsn_t current_lsn) | |
1da177e4 LT |
2634 | { |
2635 | xfs_inode_log_format_t *in_f; | |
c9f71f5f | 2636 | xfs_mount_t *mp = log->l_mp; |
1da177e4 | 2637 | xfs_buf_t *bp; |
1da177e4 | 2638 | xfs_dinode_t *dip; |
1da177e4 LT |
2639 | int len; |
2640 | xfs_caddr_t src; | |
2641 | xfs_caddr_t dest; | |
2642 | int error; | |
2643 | int attr_index; | |
2644 | uint fields; | |
347d1c01 | 2645 | xfs_icdinode_t *dicp; |
93848a99 | 2646 | uint isize; |
6d192a9b | 2647 | int need_free = 0; |
1da177e4 | 2648 | |
6d192a9b | 2649 | if (item->ri_buf[0].i_len == sizeof(xfs_inode_log_format_t)) { |
4e0d5f92 | 2650 | in_f = item->ri_buf[0].i_addr; |
6d192a9b | 2651 | } else { |
4e0d5f92 | 2652 | in_f = kmem_alloc(sizeof(xfs_inode_log_format_t), KM_SLEEP); |
6d192a9b TS |
2653 | need_free = 1; |
2654 | error = xfs_inode_item_format_convert(&item->ri_buf[0], in_f); | |
2655 | if (error) | |
2656 | goto error; | |
2657 | } | |
1da177e4 LT |
2658 | |
2659 | /* | |
2660 | * Inode buffers can be freed, look out for it, | |
2661 | * and do not replay the inode. | |
2662 | */ | |
a1941895 CH |
2663 | if (xlog_check_buffer_cancelled(log, in_f->ilf_blkno, |
2664 | in_f->ilf_len, 0)) { | |
6d192a9b | 2665 | error = 0; |
9abbc539 | 2666 | trace_xfs_log_recover_inode_cancel(log, in_f); |
6d192a9b TS |
2667 | goto error; |
2668 | } | |
9abbc539 | 2669 | trace_xfs_log_recover_inode_recover(log, in_f); |
1da177e4 | 2670 | |
c3f8fc73 | 2671 | bp = xfs_buf_read(mp->m_ddev_targp, in_f->ilf_blkno, in_f->ilf_len, 0, |
93848a99 | 2672 | &xfs_inode_buf_ops); |
ac4d6888 CS |
2673 | if (!bp) { |
2674 | error = ENOMEM; | |
2675 | goto error; | |
2676 | } | |
e5702805 | 2677 | error = bp->b_error; |
5a52c2a5 | 2678 | if (error) { |
901796af | 2679 | xfs_buf_ioerror_alert(bp, "xlog_recover_do..(read#2)"); |
638f4416 | 2680 | goto out_release; |
1da177e4 | 2681 | } |
1da177e4 | 2682 | ASSERT(in_f->ilf_fields & XFS_ILOG_CORE); |
a1941895 | 2683 | dip = (xfs_dinode_t *)xfs_buf_offset(bp, in_f->ilf_boffset); |
1da177e4 LT |
2684 | |
2685 | /* | |
2686 | * Make sure the place we're flushing out to really looks | |
2687 | * like an inode! | |
2688 | */ | |
69ef921b | 2689 | if (unlikely(dip->di_magic != cpu_to_be16(XFS_DINODE_MAGIC))) { |
a0fa2b67 DC |
2690 | xfs_alert(mp, |
2691 | "%s: Bad inode magic number, dip = 0x%p, dino bp = 0x%p, ino = %Ld", | |
2692 | __func__, dip, bp, in_f->ilf_ino); | |
c9f71f5f | 2693 | XFS_ERROR_REPORT("xlog_recover_inode_pass2(1)", |
1da177e4 | 2694 | XFS_ERRLEVEL_LOW, mp); |
6d192a9b | 2695 | error = EFSCORRUPTED; |
638f4416 | 2696 | goto out_release; |
1da177e4 | 2697 | } |
4e0d5f92 | 2698 | dicp = item->ri_buf[1].i_addr; |
1da177e4 | 2699 | if (unlikely(dicp->di_magic != XFS_DINODE_MAGIC)) { |
a0fa2b67 DC |
2700 | xfs_alert(mp, |
2701 | "%s: Bad inode log record, rec ptr 0x%p, ino %Ld", | |
2702 | __func__, item, in_f->ilf_ino); | |
c9f71f5f | 2703 | XFS_ERROR_REPORT("xlog_recover_inode_pass2(2)", |
1da177e4 | 2704 | XFS_ERRLEVEL_LOW, mp); |
6d192a9b | 2705 | error = EFSCORRUPTED; |
638f4416 | 2706 | goto out_release; |
1da177e4 LT |
2707 | } |
2708 | ||
50d5c8d8 DC |
2709 | /* |
2710 | * If the inode has an LSN in it, recover the inode only if it's less | |
638f4416 DC |
2711 | * than the lsn of the transaction we are replaying. Note: we still |
2712 | * need to replay an owner change even though the inode is more recent | |
2713 | * than the transaction as there is no guarantee that all the btree | |
2714 | * blocks are more recent than this transaction, too. | |
50d5c8d8 DC |
2715 | */ |
2716 | if (dip->di_version >= 3) { | |
2717 | xfs_lsn_t lsn = be64_to_cpu(dip->di_lsn); | |
2718 | ||
2719 | if (lsn && lsn != -1 && XFS_LSN_CMP(lsn, current_lsn) >= 0) { | |
2720 | trace_xfs_log_recover_inode_skip(log, in_f); | |
2721 | error = 0; | |
638f4416 | 2722 | goto out_owner_change; |
50d5c8d8 DC |
2723 | } |
2724 | } | |
2725 | ||
e60896d8 DC |
2726 | /* |
2727 | * di_flushiter is only valid for v1/2 inodes. All changes for v3 inodes | |
2728 | * are transactional and if ordering is necessary we can determine that | |
2729 | * more accurately by the LSN field in the V3 inode core. Don't trust | |
2730 | * the inode versions we might be changing them here - use the | |
2731 | * superblock flag to determine whether we need to look at di_flushiter | |
2732 | * to skip replay when the on disk inode is newer than the log one | |
2733 | */ | |
2734 | if (!xfs_sb_version_hascrc(&mp->m_sb) && | |
2735 | dicp->di_flushiter < be16_to_cpu(dip->di_flushiter)) { | |
1da177e4 LT |
2736 | /* |
2737 | * Deal with the wrap case, DI_MAX_FLUSH is less | |
2738 | * than smaller numbers | |
2739 | */ | |
81591fe2 | 2740 | if (be16_to_cpu(dip->di_flushiter) == DI_MAX_FLUSH && |
347d1c01 | 2741 | dicp->di_flushiter < (DI_MAX_FLUSH >> 1)) { |
1da177e4 LT |
2742 | /* do nothing */ |
2743 | } else { | |
9abbc539 | 2744 | trace_xfs_log_recover_inode_skip(log, in_f); |
6d192a9b | 2745 | error = 0; |
638f4416 | 2746 | goto out_release; |
1da177e4 LT |
2747 | } |
2748 | } | |
e60896d8 | 2749 | |
1da177e4 LT |
2750 | /* Take the opportunity to reset the flush iteration count */ |
2751 | dicp->di_flushiter = 0; | |
2752 | ||
abbede1b | 2753 | if (unlikely(S_ISREG(dicp->di_mode))) { |
1da177e4 LT |
2754 | if ((dicp->di_format != XFS_DINODE_FMT_EXTENTS) && |
2755 | (dicp->di_format != XFS_DINODE_FMT_BTREE)) { | |
c9f71f5f | 2756 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(3)", |
1da177e4 | 2757 | XFS_ERRLEVEL_LOW, mp, dicp); |
a0fa2b67 DC |
2758 | xfs_alert(mp, |
2759 | "%s: Bad regular inode log record, rec ptr 0x%p, " | |
2760 | "ino ptr = 0x%p, ino bp = 0x%p, ino %Ld", | |
2761 | __func__, item, dip, bp, in_f->ilf_ino); | |
6d192a9b | 2762 | error = EFSCORRUPTED; |
638f4416 | 2763 | goto out_release; |
1da177e4 | 2764 | } |
abbede1b | 2765 | } else if (unlikely(S_ISDIR(dicp->di_mode))) { |
1da177e4 LT |
2766 | if ((dicp->di_format != XFS_DINODE_FMT_EXTENTS) && |
2767 | (dicp->di_format != XFS_DINODE_FMT_BTREE) && | |
2768 | (dicp->di_format != XFS_DINODE_FMT_LOCAL)) { | |
c9f71f5f | 2769 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(4)", |
1da177e4 | 2770 | XFS_ERRLEVEL_LOW, mp, dicp); |
a0fa2b67 DC |
2771 | xfs_alert(mp, |
2772 | "%s: Bad dir inode log record, rec ptr 0x%p, " | |
2773 | "ino ptr = 0x%p, ino bp = 0x%p, ino %Ld", | |
2774 | __func__, item, dip, bp, in_f->ilf_ino); | |
6d192a9b | 2775 | error = EFSCORRUPTED; |
638f4416 | 2776 | goto out_release; |
1da177e4 LT |
2777 | } |
2778 | } | |
2779 | if (unlikely(dicp->di_nextents + dicp->di_anextents > dicp->di_nblocks)){ | |
c9f71f5f | 2780 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(5)", |
1da177e4 | 2781 | XFS_ERRLEVEL_LOW, mp, dicp); |
a0fa2b67 DC |
2782 | xfs_alert(mp, |
2783 | "%s: Bad inode log record, rec ptr 0x%p, dino ptr 0x%p, " | |
2784 | "dino bp 0x%p, ino %Ld, total extents = %d, nblocks = %Ld", | |
2785 | __func__, item, dip, bp, in_f->ilf_ino, | |
1da177e4 LT |
2786 | dicp->di_nextents + dicp->di_anextents, |
2787 | dicp->di_nblocks); | |
6d192a9b | 2788 | error = EFSCORRUPTED; |
638f4416 | 2789 | goto out_release; |
1da177e4 LT |
2790 | } |
2791 | if (unlikely(dicp->di_forkoff > mp->m_sb.sb_inodesize)) { | |
c9f71f5f | 2792 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(6)", |
1da177e4 | 2793 | XFS_ERRLEVEL_LOW, mp, dicp); |
a0fa2b67 DC |
2794 | xfs_alert(mp, |
2795 | "%s: Bad inode log record, rec ptr 0x%p, dino ptr 0x%p, " | |
2796 | "dino bp 0x%p, ino %Ld, forkoff 0x%x", __func__, | |
c9f71f5f | 2797 | item, dip, bp, in_f->ilf_ino, dicp->di_forkoff); |
6d192a9b | 2798 | error = EFSCORRUPTED; |
638f4416 | 2799 | goto out_release; |
1da177e4 | 2800 | } |
93848a99 CH |
2801 | isize = xfs_icdinode_size(dicp->di_version); |
2802 | if (unlikely(item->ri_buf[1].i_len > isize)) { | |
c9f71f5f | 2803 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(7)", |
1da177e4 | 2804 | XFS_ERRLEVEL_LOW, mp, dicp); |
a0fa2b67 DC |
2805 | xfs_alert(mp, |
2806 | "%s: Bad inode log record length %d, rec ptr 0x%p", | |
2807 | __func__, item->ri_buf[1].i_len, item); | |
6d192a9b | 2808 | error = EFSCORRUPTED; |
638f4416 | 2809 | goto out_release; |
1da177e4 LT |
2810 | } |
2811 | ||
2812 | /* The core is in in-core format */ | |
93848a99 | 2813 | xfs_dinode_to_disk(dip, dicp); |
1da177e4 LT |
2814 | |
2815 | /* the rest is in on-disk format */ | |
93848a99 CH |
2816 | if (item->ri_buf[1].i_len > isize) { |
2817 | memcpy((char *)dip + isize, | |
2818 | item->ri_buf[1].i_addr + isize, | |
2819 | item->ri_buf[1].i_len - isize); | |
1da177e4 LT |
2820 | } |
2821 | ||
2822 | fields = in_f->ilf_fields; | |
2823 | switch (fields & (XFS_ILOG_DEV | XFS_ILOG_UUID)) { | |
2824 | case XFS_ILOG_DEV: | |
81591fe2 | 2825 | xfs_dinode_put_rdev(dip, in_f->ilf_u.ilfu_rdev); |
1da177e4 LT |
2826 | break; |
2827 | case XFS_ILOG_UUID: | |
81591fe2 CH |
2828 | memcpy(XFS_DFORK_DPTR(dip), |
2829 | &in_f->ilf_u.ilfu_uuid, | |
2830 | sizeof(uuid_t)); | |
1da177e4 LT |
2831 | break; |
2832 | } | |
2833 | ||
2834 | if (in_f->ilf_size == 2) | |
638f4416 | 2835 | goto out_owner_change; |
1da177e4 LT |
2836 | len = item->ri_buf[2].i_len; |
2837 | src = item->ri_buf[2].i_addr; | |
2838 | ASSERT(in_f->ilf_size <= 4); | |
2839 | ASSERT((in_f->ilf_size == 3) || (fields & XFS_ILOG_AFORK)); | |
2840 | ASSERT(!(fields & XFS_ILOG_DFORK) || | |
2841 | (len == in_f->ilf_dsize)); | |
2842 | ||
2843 | switch (fields & XFS_ILOG_DFORK) { | |
2844 | case XFS_ILOG_DDATA: | |
2845 | case XFS_ILOG_DEXT: | |
81591fe2 | 2846 | memcpy(XFS_DFORK_DPTR(dip), src, len); |
1da177e4 LT |
2847 | break; |
2848 | ||
2849 | case XFS_ILOG_DBROOT: | |
7cc95a82 | 2850 | xfs_bmbt_to_bmdr(mp, (struct xfs_btree_block *)src, len, |
81591fe2 | 2851 | (xfs_bmdr_block_t *)XFS_DFORK_DPTR(dip), |
1da177e4 LT |
2852 | XFS_DFORK_DSIZE(dip, mp)); |
2853 | break; | |
2854 | ||
2855 | default: | |
2856 | /* | |
2857 | * There are no data fork flags set. | |
2858 | */ | |
2859 | ASSERT((fields & XFS_ILOG_DFORK) == 0); | |
2860 | break; | |
2861 | } | |
2862 | ||
2863 | /* | |
2864 | * If we logged any attribute data, recover it. There may or | |
2865 | * may not have been any other non-core data logged in this | |
2866 | * transaction. | |
2867 | */ | |
2868 | if (in_f->ilf_fields & XFS_ILOG_AFORK) { | |
2869 | if (in_f->ilf_fields & XFS_ILOG_DFORK) { | |
2870 | attr_index = 3; | |
2871 | } else { | |
2872 | attr_index = 2; | |
2873 | } | |
2874 | len = item->ri_buf[attr_index].i_len; | |
2875 | src = item->ri_buf[attr_index].i_addr; | |
2876 | ASSERT(len == in_f->ilf_asize); | |
2877 | ||
2878 | switch (in_f->ilf_fields & XFS_ILOG_AFORK) { | |
2879 | case XFS_ILOG_ADATA: | |
2880 | case XFS_ILOG_AEXT: | |
2881 | dest = XFS_DFORK_APTR(dip); | |
2882 | ASSERT(len <= XFS_DFORK_ASIZE(dip, mp)); | |
2883 | memcpy(dest, src, len); | |
2884 | break; | |
2885 | ||
2886 | case XFS_ILOG_ABROOT: | |
2887 | dest = XFS_DFORK_APTR(dip); | |
7cc95a82 CH |
2888 | xfs_bmbt_to_bmdr(mp, (struct xfs_btree_block *)src, |
2889 | len, (xfs_bmdr_block_t*)dest, | |
1da177e4 LT |
2890 | XFS_DFORK_ASIZE(dip, mp)); |
2891 | break; | |
2892 | ||
2893 | default: | |
a0fa2b67 | 2894 | xfs_warn(log->l_mp, "%s: Invalid flag", __func__); |
1da177e4 | 2895 | ASSERT(0); |
6d192a9b | 2896 | error = EIO; |
638f4416 | 2897 | goto out_release; |
1da177e4 LT |
2898 | } |
2899 | } | |
2900 | ||
638f4416 DC |
2901 | out_owner_change: |
2902 | if (in_f->ilf_fields & (XFS_ILOG_DOWNER|XFS_ILOG_AOWNER)) | |
2903 | error = xfs_recover_inode_owner_change(mp, dip, in_f, | |
2904 | buffer_list); | |
93848a99 CH |
2905 | /* re-generate the checksum. */ |
2906 | xfs_dinode_calc_crc(log->l_mp, dip); | |
2907 | ||
ebad861b | 2908 | ASSERT(bp->b_target->bt_mount == mp); |
cb669ca5 | 2909 | bp->b_iodone = xlog_recover_iodone; |
43ff2122 | 2910 | xfs_buf_delwri_queue(bp, buffer_list); |
50d5c8d8 DC |
2911 | |
2912 | out_release: | |
61551f1e | 2913 | xfs_buf_relse(bp); |
6d192a9b TS |
2914 | error: |
2915 | if (need_free) | |
f0e2d93c | 2916 | kmem_free(in_f); |
6d192a9b | 2917 | return XFS_ERROR(error); |
1da177e4 LT |
2918 | } |
2919 | ||
2920 | /* | |
9a8d2fdb | 2921 | * Recover QUOTAOFF records. We simply make a note of it in the xlog |
1da177e4 LT |
2922 | * structure, so that we know not to do any dquot item or dquot buffer recovery, |
2923 | * of that type. | |
2924 | */ | |
2925 | STATIC int | |
c9f71f5f | 2926 | xlog_recover_quotaoff_pass1( |
9a8d2fdb MT |
2927 | struct xlog *log, |
2928 | struct xlog_recover_item *item) | |
1da177e4 | 2929 | { |
c9f71f5f | 2930 | xfs_qoff_logformat_t *qoff_f = item->ri_buf[0].i_addr; |
1da177e4 LT |
2931 | ASSERT(qoff_f); |
2932 | ||
2933 | /* | |
2934 | * The logitem format's flag tells us if this was user quotaoff, | |
77a7cce4 | 2935 | * group/project quotaoff or both. |
1da177e4 LT |
2936 | */ |
2937 | if (qoff_f->qf_flags & XFS_UQUOTA_ACCT) | |
2938 | log->l_quotaoffs_flag |= XFS_DQ_USER; | |
77a7cce4 NS |
2939 | if (qoff_f->qf_flags & XFS_PQUOTA_ACCT) |
2940 | log->l_quotaoffs_flag |= XFS_DQ_PROJ; | |
1da177e4 LT |
2941 | if (qoff_f->qf_flags & XFS_GQUOTA_ACCT) |
2942 | log->l_quotaoffs_flag |= XFS_DQ_GROUP; | |
2943 | ||
2944 | return (0); | |
2945 | } | |
2946 | ||
2947 | /* | |
2948 | * Recover a dquot record | |
2949 | */ | |
2950 | STATIC int | |
c9f71f5f | 2951 | xlog_recover_dquot_pass2( |
9a8d2fdb MT |
2952 | struct xlog *log, |
2953 | struct list_head *buffer_list, | |
50d5c8d8 DC |
2954 | struct xlog_recover_item *item, |
2955 | xfs_lsn_t current_lsn) | |
1da177e4 | 2956 | { |
c9f71f5f | 2957 | xfs_mount_t *mp = log->l_mp; |
1da177e4 LT |
2958 | xfs_buf_t *bp; |
2959 | struct xfs_disk_dquot *ddq, *recddq; | |
2960 | int error; | |
2961 | xfs_dq_logformat_t *dq_f; | |
2962 | uint type; | |
2963 | ||
1da177e4 LT |
2964 | |
2965 | /* | |
2966 | * Filesystems are required to send in quota flags at mount time. | |
2967 | */ | |
2968 | if (mp->m_qflags == 0) | |
2969 | return (0); | |
2970 | ||
4e0d5f92 CH |
2971 | recddq = item->ri_buf[1].i_addr; |
2972 | if (recddq == NULL) { | |
a0fa2b67 | 2973 | xfs_alert(log->l_mp, "NULL dquot in %s.", __func__); |
0c5e1ce8 CH |
2974 | return XFS_ERROR(EIO); |
2975 | } | |
8ec6dba2 | 2976 | if (item->ri_buf[1].i_len < sizeof(xfs_disk_dquot_t)) { |
a0fa2b67 | 2977 | xfs_alert(log->l_mp, "dquot too small (%d) in %s.", |
0c5e1ce8 CH |
2978 | item->ri_buf[1].i_len, __func__); |
2979 | return XFS_ERROR(EIO); | |
2980 | } | |
2981 | ||
1da177e4 LT |
2982 | /* |
2983 | * This type of quotas was turned off, so ignore this record. | |
2984 | */ | |
b53e675d | 2985 | type = recddq->d_flags & (XFS_DQ_USER | XFS_DQ_PROJ | XFS_DQ_GROUP); |
1da177e4 LT |
2986 | ASSERT(type); |
2987 | if (log->l_quotaoffs_flag & type) | |
2988 | return (0); | |
2989 | ||
2990 | /* | |
2991 | * At this point we know that quota was _not_ turned off. | |
2992 | * Since the mount flags are not indicating to us otherwise, this | |
2993 | * must mean that quota is on, and the dquot needs to be replayed. | |
2994 | * Remember that we may not have fully recovered the superblock yet, | |
2995 | * so we can't do the usual trick of looking at the SB quota bits. | |
2996 | * | |
2997 | * The other possibility, of course, is that the quota subsystem was | |
2998 | * removed since the last mount - ENOSYS. | |
2999 | */ | |
4e0d5f92 | 3000 | dq_f = item->ri_buf[0].i_addr; |
1da177e4 | 3001 | ASSERT(dq_f); |
9aede1d8 | 3002 | error = xfs_dqcheck(mp, recddq, dq_f->qlf_id, 0, XFS_QMOPT_DOWARN, |
a0fa2b67 DC |
3003 | "xlog_recover_dquot_pass2 (log copy)"); |
3004 | if (error) | |
1da177e4 | 3005 | return XFS_ERROR(EIO); |
1da177e4 LT |
3006 | ASSERT(dq_f->qlf_len == 1); |
3007 | ||
7ca790a5 | 3008 | error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, dq_f->qlf_blkno, |
c3f8fc73 DC |
3009 | XFS_FSB_TO_BB(mp, dq_f->qlf_len), 0, &bp, |
3010 | NULL); | |
7ca790a5 | 3011 | if (error) |
1da177e4 | 3012 | return error; |
7ca790a5 | 3013 | |
1da177e4 LT |
3014 | ASSERT(bp); |
3015 | ddq = (xfs_disk_dquot_t *)xfs_buf_offset(bp, dq_f->qlf_boffset); | |
3016 | ||
3017 | /* | |
3018 | * At least the magic num portion should be on disk because this | |
3019 | * was among a chunk of dquots created earlier, and we did some | |
3020 | * minimal initialization then. | |
3021 | */ | |
9aede1d8 | 3022 | error = xfs_dqcheck(mp, ddq, dq_f->qlf_id, 0, XFS_QMOPT_DOWARN, |
a0fa2b67 DC |
3023 | "xlog_recover_dquot_pass2"); |
3024 | if (error) { | |
1da177e4 LT |
3025 | xfs_buf_relse(bp); |
3026 | return XFS_ERROR(EIO); | |
3027 | } | |
3028 | ||
50d5c8d8 DC |
3029 | /* |
3030 | * If the dquot has an LSN in it, recover the dquot only if it's less | |
3031 | * than the lsn of the transaction we are replaying. | |
3032 | */ | |
3033 | if (xfs_sb_version_hascrc(&mp->m_sb)) { | |
3034 | struct xfs_dqblk *dqb = (struct xfs_dqblk *)ddq; | |
3035 | xfs_lsn_t lsn = be64_to_cpu(dqb->dd_lsn); | |
3036 | ||
3037 | if (lsn && lsn != -1 && XFS_LSN_CMP(lsn, current_lsn) >= 0) { | |
3038 | goto out_release; | |
3039 | } | |
3040 | } | |
3041 | ||
1da177e4 | 3042 | memcpy(ddq, recddq, item->ri_buf[1].i_len); |
6fcdc59d DC |
3043 | if (xfs_sb_version_hascrc(&mp->m_sb)) { |
3044 | xfs_update_cksum((char *)ddq, sizeof(struct xfs_dqblk), | |
3045 | XFS_DQUOT_CRC_OFF); | |
3046 | } | |
1da177e4 LT |
3047 | |
3048 | ASSERT(dq_f->qlf_size == 2); | |
ebad861b | 3049 | ASSERT(bp->b_target->bt_mount == mp); |
cb669ca5 | 3050 | bp->b_iodone = xlog_recover_iodone; |
43ff2122 | 3051 | xfs_buf_delwri_queue(bp, buffer_list); |
1da177e4 | 3052 | |
50d5c8d8 DC |
3053 | out_release: |
3054 | xfs_buf_relse(bp); | |
3055 | return 0; | |
1da177e4 LT |
3056 | } |
3057 | ||
3058 | /* | |
3059 | * This routine is called to create an in-core extent free intent | |
3060 | * item from the efi format structure which was logged on disk. | |
3061 | * It allocates an in-core efi, copies the extents from the format | |
3062 | * structure into it, and adds the efi to the AIL with the given | |
3063 | * LSN. | |
3064 | */ | |
6d192a9b | 3065 | STATIC int |
c9f71f5f | 3066 | xlog_recover_efi_pass2( |
9a8d2fdb MT |
3067 | struct xlog *log, |
3068 | struct xlog_recover_item *item, | |
3069 | xfs_lsn_t lsn) | |
1da177e4 | 3070 | { |
6d192a9b | 3071 | int error; |
c9f71f5f | 3072 | xfs_mount_t *mp = log->l_mp; |
1da177e4 LT |
3073 | xfs_efi_log_item_t *efip; |
3074 | xfs_efi_log_format_t *efi_formatp; | |
1da177e4 | 3075 | |
4e0d5f92 | 3076 | efi_formatp = item->ri_buf[0].i_addr; |
1da177e4 | 3077 | |
1da177e4 | 3078 | efip = xfs_efi_init(mp, efi_formatp->efi_nextents); |
6d192a9b TS |
3079 | if ((error = xfs_efi_copy_format(&(item->ri_buf[0]), |
3080 | &(efip->efi_format)))) { | |
3081 | xfs_efi_item_free(efip); | |
3082 | return error; | |
3083 | } | |
b199c8a4 | 3084 | atomic_set(&efip->efi_next_extent, efi_formatp->efi_nextents); |
1da177e4 | 3085 | |
a9c21c1b | 3086 | spin_lock(&log->l_ailp->xa_lock); |
1da177e4 | 3087 | /* |
783a2f65 | 3088 | * xfs_trans_ail_update() drops the AIL lock. |
1da177e4 | 3089 | */ |
e6059949 | 3090 | xfs_trans_ail_update(log->l_ailp, &efip->efi_item, lsn); |
6d192a9b | 3091 | return 0; |
1da177e4 LT |
3092 | } |
3093 | ||
3094 | ||
3095 | /* | |
3096 | * This routine is called when an efd format structure is found in | |
3097 | * a committed transaction in the log. It's purpose is to cancel | |
3098 | * the corresponding efi if it was still in the log. To do this | |
3099 | * it searches the AIL for the efi with an id equal to that in the | |
3100 | * efd format structure. If we find it, we remove the efi from the | |
3101 | * AIL and free it. | |
3102 | */ | |
c9f71f5f CH |
3103 | STATIC int |
3104 | xlog_recover_efd_pass2( | |
9a8d2fdb MT |
3105 | struct xlog *log, |
3106 | struct xlog_recover_item *item) | |
1da177e4 | 3107 | { |
1da177e4 LT |
3108 | xfs_efd_log_format_t *efd_formatp; |
3109 | xfs_efi_log_item_t *efip = NULL; | |
3110 | xfs_log_item_t *lip; | |
1da177e4 | 3111 | __uint64_t efi_id; |
27d8d5fe | 3112 | struct xfs_ail_cursor cur; |
783a2f65 | 3113 | struct xfs_ail *ailp = log->l_ailp; |
1da177e4 | 3114 | |
4e0d5f92 | 3115 | efd_formatp = item->ri_buf[0].i_addr; |
6d192a9b TS |
3116 | ASSERT((item->ri_buf[0].i_len == (sizeof(xfs_efd_log_format_32_t) + |
3117 | ((efd_formatp->efd_nextents - 1) * sizeof(xfs_extent_32_t)))) || | |
3118 | (item->ri_buf[0].i_len == (sizeof(xfs_efd_log_format_64_t) + | |
3119 | ((efd_formatp->efd_nextents - 1) * sizeof(xfs_extent_64_t))))); | |
1da177e4 LT |
3120 | efi_id = efd_formatp->efd_efi_id; |
3121 | ||
3122 | /* | |
3123 | * Search for the efi with the id in the efd format structure | |
3124 | * in the AIL. | |
3125 | */ | |
a9c21c1b DC |
3126 | spin_lock(&ailp->xa_lock); |
3127 | lip = xfs_trans_ail_cursor_first(ailp, &cur, 0); | |
1da177e4 LT |
3128 | while (lip != NULL) { |
3129 | if (lip->li_type == XFS_LI_EFI) { | |
3130 | efip = (xfs_efi_log_item_t *)lip; | |
3131 | if (efip->efi_format.efi_id == efi_id) { | |
3132 | /* | |
783a2f65 | 3133 | * xfs_trans_ail_delete() drops the |
1da177e4 LT |
3134 | * AIL lock. |
3135 | */ | |
04913fdd DC |
3136 | xfs_trans_ail_delete(ailp, lip, |
3137 | SHUTDOWN_CORRUPT_INCORE); | |
8ae2c0f6 | 3138 | xfs_efi_item_free(efip); |
a9c21c1b | 3139 | spin_lock(&ailp->xa_lock); |
27d8d5fe | 3140 | break; |
1da177e4 LT |
3141 | } |
3142 | } | |
a9c21c1b | 3143 | lip = xfs_trans_ail_cursor_next(ailp, &cur); |
1da177e4 | 3144 | } |
a9c21c1b DC |
3145 | xfs_trans_ail_cursor_done(ailp, &cur); |
3146 | spin_unlock(&ailp->xa_lock); | |
c9f71f5f CH |
3147 | |
3148 | return 0; | |
1da177e4 LT |
3149 | } |
3150 | ||
28c8e41a DC |
3151 | /* |
3152 | * This routine is called when an inode create format structure is found in a | |
3153 | * committed transaction in the log. It's purpose is to initialise the inodes | |
3154 | * being allocated on disk. This requires us to get inode cluster buffers that | |
3155 | * match the range to be intialised, stamped with inode templates and written | |
3156 | * by delayed write so that subsequent modifications will hit the cached buffer | |
3157 | * and only need writing out at the end of recovery. | |
3158 | */ | |
3159 | STATIC int | |
3160 | xlog_recover_do_icreate_pass2( | |
3161 | struct xlog *log, | |
3162 | struct list_head *buffer_list, | |
3163 | xlog_recover_item_t *item) | |
3164 | { | |
3165 | struct xfs_mount *mp = log->l_mp; | |
3166 | struct xfs_icreate_log *icl; | |
3167 | xfs_agnumber_t agno; | |
3168 | xfs_agblock_t agbno; | |
3169 | unsigned int count; | |
3170 | unsigned int isize; | |
3171 | xfs_agblock_t length; | |
3172 | ||
3173 | icl = (struct xfs_icreate_log *)item->ri_buf[0].i_addr; | |
3174 | if (icl->icl_type != XFS_LI_ICREATE) { | |
3175 | xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad type"); | |
3176 | return EINVAL; | |
3177 | } | |
3178 | ||
3179 | if (icl->icl_size != 1) { | |
3180 | xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad icl size"); | |
3181 | return EINVAL; | |
3182 | } | |
3183 | ||
3184 | agno = be32_to_cpu(icl->icl_ag); | |
3185 | if (agno >= mp->m_sb.sb_agcount) { | |
3186 | xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad agno"); | |
3187 | return EINVAL; | |
3188 | } | |
3189 | agbno = be32_to_cpu(icl->icl_agbno); | |
3190 | if (!agbno || agbno == NULLAGBLOCK || agbno >= mp->m_sb.sb_agblocks) { | |
3191 | xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad agbno"); | |
3192 | return EINVAL; | |
3193 | } | |
3194 | isize = be32_to_cpu(icl->icl_isize); | |
3195 | if (isize != mp->m_sb.sb_inodesize) { | |
3196 | xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad isize"); | |
3197 | return EINVAL; | |
3198 | } | |
3199 | count = be32_to_cpu(icl->icl_count); | |
3200 | if (!count) { | |
3201 | xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad count"); | |
3202 | return EINVAL; | |
3203 | } | |
3204 | length = be32_to_cpu(icl->icl_length); | |
3205 | if (!length || length >= mp->m_sb.sb_agblocks) { | |
3206 | xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad length"); | |
3207 | return EINVAL; | |
3208 | } | |
3209 | ||
3210 | /* existing allocation is fixed value */ | |
71783438 | 3211 | ASSERT(count == mp->m_ialloc_inos); |
28c8e41a | 3212 | ASSERT(length == XFS_IALLOC_BLOCKS(mp)); |
71783438 | 3213 | if (count != mp->m_ialloc_inos || |
28c8e41a DC |
3214 | length != XFS_IALLOC_BLOCKS(mp)) { |
3215 | xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad count 2"); | |
3216 | return EINVAL; | |
3217 | } | |
3218 | ||
3219 | /* | |
3220 | * Inode buffers can be freed. Do not replay the inode initialisation as | |
3221 | * we could be overwriting something written after this inode buffer was | |
3222 | * cancelled. | |
3223 | * | |
3224 | * XXX: we need to iterate all buffers and only init those that are not | |
3225 | * cancelled. I think that a more fine grained factoring of | |
3226 | * xfs_ialloc_inode_init may be appropriate here to enable this to be | |
3227 | * done easily. | |
3228 | */ | |
3229 | if (xlog_check_buffer_cancelled(log, | |
3230 | XFS_AGB_TO_DADDR(mp, agno, agbno), length, 0)) | |
3231 | return 0; | |
3232 | ||
3233 | xfs_ialloc_inode_init(mp, NULL, buffer_list, agno, agbno, length, | |
3234 | be32_to_cpu(icl->icl_gen)); | |
3235 | return 0; | |
3236 | } | |
3237 | ||
1da177e4 LT |
3238 | /* |
3239 | * Free up any resources allocated by the transaction | |
3240 | * | |
3241 | * Remember that EFIs, EFDs, and IUNLINKs are handled later. | |
3242 | */ | |
3243 | STATIC void | |
3244 | xlog_recover_free_trans( | |
d0450948 | 3245 | struct xlog_recover *trans) |
1da177e4 | 3246 | { |
f0a76953 | 3247 | xlog_recover_item_t *item, *n; |
1da177e4 LT |
3248 | int i; |
3249 | ||
f0a76953 DC |
3250 | list_for_each_entry_safe(item, n, &trans->r_itemq, ri_list) { |
3251 | /* Free the regions in the item. */ | |
3252 | list_del(&item->ri_list); | |
3253 | for (i = 0; i < item->ri_cnt; i++) | |
3254 | kmem_free(item->ri_buf[i].i_addr); | |
1da177e4 | 3255 | /* Free the item itself */ |
f0a76953 DC |
3256 | kmem_free(item->ri_buf); |
3257 | kmem_free(item); | |
3258 | } | |
1da177e4 | 3259 | /* Free the transaction recover structure */ |
f0e2d93c | 3260 | kmem_free(trans); |
1da177e4 LT |
3261 | } |
3262 | ||
00574da1 ZYW |
3263 | STATIC void |
3264 | xlog_recover_buffer_ra_pass2( | |
3265 | struct xlog *log, | |
3266 | struct xlog_recover_item *item) | |
3267 | { | |
3268 | struct xfs_buf_log_format *buf_f = item->ri_buf[0].i_addr; | |
3269 | struct xfs_mount *mp = log->l_mp; | |
3270 | ||
84a5b730 | 3271 | if (xlog_peek_buffer_cancelled(log, buf_f->blf_blkno, |
00574da1 ZYW |
3272 | buf_f->blf_len, buf_f->blf_flags)) { |
3273 | return; | |
3274 | } | |
3275 | ||
3276 | xfs_buf_readahead(mp->m_ddev_targp, buf_f->blf_blkno, | |
3277 | buf_f->blf_len, NULL); | |
3278 | } | |
3279 | ||
3280 | STATIC void | |
3281 | xlog_recover_inode_ra_pass2( | |
3282 | struct xlog *log, | |
3283 | struct xlog_recover_item *item) | |
3284 | { | |
3285 | struct xfs_inode_log_format ilf_buf; | |
3286 | struct xfs_inode_log_format *ilfp; | |
3287 | struct xfs_mount *mp = log->l_mp; | |
3288 | int error; | |
3289 | ||
3290 | if (item->ri_buf[0].i_len == sizeof(struct xfs_inode_log_format)) { | |
3291 | ilfp = item->ri_buf[0].i_addr; | |
3292 | } else { | |
3293 | ilfp = &ilf_buf; | |
3294 | memset(ilfp, 0, sizeof(*ilfp)); | |
3295 | error = xfs_inode_item_format_convert(&item->ri_buf[0], ilfp); | |
3296 | if (error) | |
3297 | return; | |
3298 | } | |
3299 | ||
84a5b730 | 3300 | if (xlog_peek_buffer_cancelled(log, ilfp->ilf_blkno, ilfp->ilf_len, 0)) |
00574da1 ZYW |
3301 | return; |
3302 | ||
3303 | xfs_buf_readahead(mp->m_ddev_targp, ilfp->ilf_blkno, | |
d8914002 | 3304 | ilfp->ilf_len, &xfs_inode_buf_ra_ops); |
00574da1 ZYW |
3305 | } |
3306 | ||
3307 | STATIC void | |
3308 | xlog_recover_dquot_ra_pass2( | |
3309 | struct xlog *log, | |
3310 | struct xlog_recover_item *item) | |
3311 | { | |
3312 | struct xfs_mount *mp = log->l_mp; | |
3313 | struct xfs_disk_dquot *recddq; | |
3314 | struct xfs_dq_logformat *dq_f; | |
3315 | uint type; | |
3316 | ||
3317 | ||
3318 | if (mp->m_qflags == 0) | |
3319 | return; | |
3320 | ||
3321 | recddq = item->ri_buf[1].i_addr; | |
3322 | if (recddq == NULL) | |
3323 | return; | |
3324 | if (item->ri_buf[1].i_len < sizeof(struct xfs_disk_dquot)) | |
3325 | return; | |
3326 | ||
3327 | type = recddq->d_flags & (XFS_DQ_USER | XFS_DQ_PROJ | XFS_DQ_GROUP); | |
3328 | ASSERT(type); | |
3329 | if (log->l_quotaoffs_flag & type) | |
3330 | return; | |
3331 | ||
3332 | dq_f = item->ri_buf[0].i_addr; | |
3333 | ASSERT(dq_f); | |
3334 | ASSERT(dq_f->qlf_len == 1); | |
3335 | ||
3336 | xfs_buf_readahead(mp->m_ddev_targp, dq_f->qlf_blkno, | |
0f0d3345 | 3337 | XFS_FSB_TO_BB(mp, dq_f->qlf_len), NULL); |
00574da1 ZYW |
3338 | } |
3339 | ||
3340 | STATIC void | |
3341 | xlog_recover_ra_pass2( | |
3342 | struct xlog *log, | |
3343 | struct xlog_recover_item *item) | |
3344 | { | |
3345 | switch (ITEM_TYPE(item)) { | |
3346 | case XFS_LI_BUF: | |
3347 | xlog_recover_buffer_ra_pass2(log, item); | |
3348 | break; | |
3349 | case XFS_LI_INODE: | |
3350 | xlog_recover_inode_ra_pass2(log, item); | |
3351 | break; | |
3352 | case XFS_LI_DQUOT: | |
3353 | xlog_recover_dquot_ra_pass2(log, item); | |
3354 | break; | |
3355 | case XFS_LI_EFI: | |
3356 | case XFS_LI_EFD: | |
3357 | case XFS_LI_QUOTAOFF: | |
3358 | default: | |
3359 | break; | |
3360 | } | |
3361 | } | |
3362 | ||
d0450948 | 3363 | STATIC int |
c9f71f5f | 3364 | xlog_recover_commit_pass1( |
ad223e60 MT |
3365 | struct xlog *log, |
3366 | struct xlog_recover *trans, | |
3367 | struct xlog_recover_item *item) | |
d0450948 | 3368 | { |
c9f71f5f | 3369 | trace_xfs_log_recover_item_recover(log, trans, item, XLOG_RECOVER_PASS1); |
d0450948 CH |
3370 | |
3371 | switch (ITEM_TYPE(item)) { | |
3372 | case XFS_LI_BUF: | |
c9f71f5f CH |
3373 | return xlog_recover_buffer_pass1(log, item); |
3374 | case XFS_LI_QUOTAOFF: | |
3375 | return xlog_recover_quotaoff_pass1(log, item); | |
d0450948 | 3376 | case XFS_LI_INODE: |
d0450948 | 3377 | case XFS_LI_EFI: |
d0450948 | 3378 | case XFS_LI_EFD: |
c9f71f5f | 3379 | case XFS_LI_DQUOT: |
28c8e41a | 3380 | case XFS_LI_ICREATE: |
c9f71f5f | 3381 | /* nothing to do in pass 1 */ |
d0450948 | 3382 | return 0; |
c9f71f5f | 3383 | default: |
a0fa2b67 DC |
3384 | xfs_warn(log->l_mp, "%s: invalid item type (%d)", |
3385 | __func__, ITEM_TYPE(item)); | |
c9f71f5f CH |
3386 | ASSERT(0); |
3387 | return XFS_ERROR(EIO); | |
3388 | } | |
3389 | } | |
3390 | ||
3391 | STATIC int | |
3392 | xlog_recover_commit_pass2( | |
ad223e60 MT |
3393 | struct xlog *log, |
3394 | struct xlog_recover *trans, | |
3395 | struct list_head *buffer_list, | |
3396 | struct xlog_recover_item *item) | |
c9f71f5f CH |
3397 | { |
3398 | trace_xfs_log_recover_item_recover(log, trans, item, XLOG_RECOVER_PASS2); | |
3399 | ||
3400 | switch (ITEM_TYPE(item)) { | |
3401 | case XFS_LI_BUF: | |
50d5c8d8 DC |
3402 | return xlog_recover_buffer_pass2(log, buffer_list, item, |
3403 | trans->r_lsn); | |
c9f71f5f | 3404 | case XFS_LI_INODE: |
50d5c8d8 DC |
3405 | return xlog_recover_inode_pass2(log, buffer_list, item, |
3406 | trans->r_lsn); | |
c9f71f5f CH |
3407 | case XFS_LI_EFI: |
3408 | return xlog_recover_efi_pass2(log, item, trans->r_lsn); | |
3409 | case XFS_LI_EFD: | |
3410 | return xlog_recover_efd_pass2(log, item); | |
d0450948 | 3411 | case XFS_LI_DQUOT: |
50d5c8d8 DC |
3412 | return xlog_recover_dquot_pass2(log, buffer_list, item, |
3413 | trans->r_lsn); | |
28c8e41a DC |
3414 | case XFS_LI_ICREATE: |
3415 | return xlog_recover_do_icreate_pass2(log, buffer_list, item); | |
d0450948 | 3416 | case XFS_LI_QUOTAOFF: |
c9f71f5f CH |
3417 | /* nothing to do in pass2 */ |
3418 | return 0; | |
d0450948 | 3419 | default: |
a0fa2b67 DC |
3420 | xfs_warn(log->l_mp, "%s: invalid item type (%d)", |
3421 | __func__, ITEM_TYPE(item)); | |
d0450948 CH |
3422 | ASSERT(0); |
3423 | return XFS_ERROR(EIO); | |
3424 | } | |
3425 | } | |
3426 | ||
00574da1 ZYW |
3427 | STATIC int |
3428 | xlog_recover_items_pass2( | |
3429 | struct xlog *log, | |
3430 | struct xlog_recover *trans, | |
3431 | struct list_head *buffer_list, | |
3432 | struct list_head *item_list) | |
3433 | { | |
3434 | struct xlog_recover_item *item; | |
3435 | int error = 0; | |
3436 | ||
3437 | list_for_each_entry(item, item_list, ri_list) { | |
3438 | error = xlog_recover_commit_pass2(log, trans, | |
3439 | buffer_list, item); | |
3440 | if (error) | |
3441 | return error; | |
3442 | } | |
3443 | ||
3444 | return error; | |
3445 | } | |
3446 | ||
d0450948 CH |
3447 | /* |
3448 | * Perform the transaction. | |
3449 | * | |
3450 | * If the transaction modifies a buffer or inode, do it now. Otherwise, | |
3451 | * EFIs and EFDs get queued up by adding entries into the AIL for them. | |
3452 | */ | |
1da177e4 LT |
3453 | STATIC int |
3454 | xlog_recover_commit_trans( | |
ad223e60 | 3455 | struct xlog *log, |
d0450948 | 3456 | struct xlog_recover *trans, |
1da177e4 LT |
3457 | int pass) |
3458 | { | |
00574da1 ZYW |
3459 | int error = 0; |
3460 | int error2; | |
3461 | int items_queued = 0; | |
3462 | struct xlog_recover_item *item; | |
3463 | struct xlog_recover_item *next; | |
3464 | LIST_HEAD (buffer_list); | |
3465 | LIST_HEAD (ra_list); | |
3466 | LIST_HEAD (done_list); | |
3467 | ||
3468 | #define XLOG_RECOVER_COMMIT_QUEUE_MAX 100 | |
1da177e4 | 3469 | |
f0a76953 | 3470 | hlist_del(&trans->r_list); |
d0450948 CH |
3471 | |
3472 | error = xlog_recover_reorder_trans(log, trans, pass); | |
3473 | if (error) | |
1da177e4 | 3474 | return error; |
d0450948 | 3475 | |
00574da1 | 3476 | list_for_each_entry_safe(item, next, &trans->r_itemq, ri_list) { |
43ff2122 CH |
3477 | switch (pass) { |
3478 | case XLOG_RECOVER_PASS1: | |
c9f71f5f | 3479 | error = xlog_recover_commit_pass1(log, trans, item); |
43ff2122 CH |
3480 | break; |
3481 | case XLOG_RECOVER_PASS2: | |
00574da1 ZYW |
3482 | xlog_recover_ra_pass2(log, item); |
3483 | list_move_tail(&item->ri_list, &ra_list); | |
3484 | items_queued++; | |
3485 | if (items_queued >= XLOG_RECOVER_COMMIT_QUEUE_MAX) { | |
3486 | error = xlog_recover_items_pass2(log, trans, | |
3487 | &buffer_list, &ra_list); | |
3488 | list_splice_tail_init(&ra_list, &done_list); | |
3489 | items_queued = 0; | |
3490 | } | |
3491 | ||
43ff2122 CH |
3492 | break; |
3493 | default: | |
3494 | ASSERT(0); | |
3495 | } | |
3496 | ||
d0450948 | 3497 | if (error) |
43ff2122 | 3498 | goto out; |
d0450948 CH |
3499 | } |
3500 | ||
00574da1 ZYW |
3501 | out: |
3502 | if (!list_empty(&ra_list)) { | |
3503 | if (!error) | |
3504 | error = xlog_recover_items_pass2(log, trans, | |
3505 | &buffer_list, &ra_list); | |
3506 | list_splice_tail_init(&ra_list, &done_list); | |
3507 | } | |
3508 | ||
3509 | if (!list_empty(&done_list)) | |
3510 | list_splice_init(&done_list, &trans->r_itemq); | |
3511 | ||
d0450948 | 3512 | xlog_recover_free_trans(trans); |
43ff2122 | 3513 | |
43ff2122 CH |
3514 | error2 = xfs_buf_delwri_submit(&buffer_list); |
3515 | return error ? error : error2; | |
1da177e4 LT |
3516 | } |
3517 | ||
3518 | STATIC int | |
3519 | xlog_recover_unmount_trans( | |
ad223e60 MT |
3520 | struct xlog *log, |
3521 | struct xlog_recover *trans) | |
1da177e4 LT |
3522 | { |
3523 | /* Do nothing now */ | |
a0fa2b67 | 3524 | xfs_warn(log->l_mp, "%s: Unmount LR", __func__); |
1da177e4 LT |
3525 | return 0; |
3526 | } | |
3527 | ||
3528 | /* | |
3529 | * There are two valid states of the r_state field. 0 indicates that the | |
3530 | * transaction structure is in a normal state. We have either seen the | |
3531 | * start of the transaction or the last operation we added was not a partial | |
3532 | * operation. If the last operation we added to the transaction was a | |
3533 | * partial operation, we need to mark r_state with XLOG_WAS_CONT_TRANS. | |
3534 | * | |
3535 | * NOTE: skip LRs with 0 data length. | |
3536 | */ | |
3537 | STATIC int | |
3538 | xlog_recover_process_data( | |
9a8d2fdb | 3539 | struct xlog *log, |
f0a76953 | 3540 | struct hlist_head rhash[], |
9a8d2fdb | 3541 | struct xlog_rec_header *rhead, |
1da177e4 LT |
3542 | xfs_caddr_t dp, |
3543 | int pass) | |
3544 | { | |
3545 | xfs_caddr_t lp; | |
3546 | int num_logops; | |
3547 | xlog_op_header_t *ohead; | |
3548 | xlog_recover_t *trans; | |
3549 | xlog_tid_t tid; | |
3550 | int error; | |
3551 | unsigned long hash; | |
3552 | uint flags; | |
3553 | ||
b53e675d CH |
3554 | lp = dp + be32_to_cpu(rhead->h_len); |
3555 | num_logops = be32_to_cpu(rhead->h_num_logops); | |
1da177e4 LT |
3556 | |
3557 | /* check the log format matches our own - else we can't recover */ | |
3558 | if (xlog_header_check_recover(log->l_mp, rhead)) | |
3559 | return (XFS_ERROR(EIO)); | |
3560 | ||
3561 | while ((dp < lp) && num_logops) { | |
3562 | ASSERT(dp + sizeof(xlog_op_header_t) <= lp); | |
3563 | ohead = (xlog_op_header_t *)dp; | |
3564 | dp += sizeof(xlog_op_header_t); | |
3565 | if (ohead->oh_clientid != XFS_TRANSACTION && | |
3566 | ohead->oh_clientid != XFS_LOG) { | |
a0fa2b67 DC |
3567 | xfs_warn(log->l_mp, "%s: bad clientid 0x%x", |
3568 | __func__, ohead->oh_clientid); | |
1da177e4 LT |
3569 | ASSERT(0); |
3570 | return (XFS_ERROR(EIO)); | |
3571 | } | |
67fcb7bf | 3572 | tid = be32_to_cpu(ohead->oh_tid); |
1da177e4 | 3573 | hash = XLOG_RHASH(tid); |
f0a76953 | 3574 | trans = xlog_recover_find_tid(&rhash[hash], tid); |
1da177e4 LT |
3575 | if (trans == NULL) { /* not found; add new tid */ |
3576 | if (ohead->oh_flags & XLOG_START_TRANS) | |
3577 | xlog_recover_new_tid(&rhash[hash], tid, | |
b53e675d | 3578 | be64_to_cpu(rhead->h_lsn)); |
1da177e4 | 3579 | } else { |
9742bb93 | 3580 | if (dp + be32_to_cpu(ohead->oh_len) > lp) { |
a0fa2b67 DC |
3581 | xfs_warn(log->l_mp, "%s: bad length 0x%x", |
3582 | __func__, be32_to_cpu(ohead->oh_len)); | |
9742bb93 LM |
3583 | WARN_ON(1); |
3584 | return (XFS_ERROR(EIO)); | |
3585 | } | |
1da177e4 LT |
3586 | flags = ohead->oh_flags & ~XLOG_END_TRANS; |
3587 | if (flags & XLOG_WAS_CONT_TRANS) | |
3588 | flags &= ~XLOG_CONTINUE_TRANS; | |
3589 | switch (flags) { | |
3590 | case XLOG_COMMIT_TRANS: | |
3591 | error = xlog_recover_commit_trans(log, | |
f0a76953 | 3592 | trans, pass); |
1da177e4 LT |
3593 | break; |
3594 | case XLOG_UNMOUNT_TRANS: | |
a0fa2b67 | 3595 | error = xlog_recover_unmount_trans(log, trans); |
1da177e4 LT |
3596 | break; |
3597 | case XLOG_WAS_CONT_TRANS: | |
9abbc539 DC |
3598 | error = xlog_recover_add_to_cont_trans(log, |
3599 | trans, dp, | |
3600 | be32_to_cpu(ohead->oh_len)); | |
1da177e4 LT |
3601 | break; |
3602 | case XLOG_START_TRANS: | |
a0fa2b67 DC |
3603 | xfs_warn(log->l_mp, "%s: bad transaction", |
3604 | __func__); | |
1da177e4 LT |
3605 | ASSERT(0); |
3606 | error = XFS_ERROR(EIO); | |
3607 | break; | |
3608 | case 0: | |
3609 | case XLOG_CONTINUE_TRANS: | |
9abbc539 | 3610 | error = xlog_recover_add_to_trans(log, trans, |
67fcb7bf | 3611 | dp, be32_to_cpu(ohead->oh_len)); |
1da177e4 LT |
3612 | break; |
3613 | default: | |
a0fa2b67 DC |
3614 | xfs_warn(log->l_mp, "%s: bad flag 0x%x", |
3615 | __func__, flags); | |
1da177e4 LT |
3616 | ASSERT(0); |
3617 | error = XFS_ERROR(EIO); | |
3618 | break; | |
3619 | } | |
2a84108f MT |
3620 | if (error) { |
3621 | xlog_recover_free_trans(trans); | |
1da177e4 | 3622 | return error; |
2a84108f | 3623 | } |
1da177e4 | 3624 | } |
67fcb7bf | 3625 | dp += be32_to_cpu(ohead->oh_len); |
1da177e4 LT |
3626 | num_logops--; |
3627 | } | |
3628 | return 0; | |
3629 | } | |
3630 | ||
3631 | /* | |
3632 | * Process an extent free intent item that was recovered from | |
3633 | * the log. We need to free the extents that it describes. | |
3634 | */ | |
3c1e2bbe | 3635 | STATIC int |
1da177e4 LT |
3636 | xlog_recover_process_efi( |
3637 | xfs_mount_t *mp, | |
3638 | xfs_efi_log_item_t *efip) | |
3639 | { | |
3640 | xfs_efd_log_item_t *efdp; | |
3641 | xfs_trans_t *tp; | |
3642 | int i; | |
3c1e2bbe | 3643 | int error = 0; |
1da177e4 LT |
3644 | xfs_extent_t *extp; |
3645 | xfs_fsblock_t startblock_fsb; | |
3646 | ||
b199c8a4 | 3647 | ASSERT(!test_bit(XFS_EFI_RECOVERED, &efip->efi_flags)); |
1da177e4 LT |
3648 | |
3649 | /* | |
3650 | * First check the validity of the extents described by the | |
3651 | * EFI. If any are bad, then assume that all are bad and | |
3652 | * just toss the EFI. | |
3653 | */ | |
3654 | for (i = 0; i < efip->efi_format.efi_nextents; i++) { | |
3655 | extp = &(efip->efi_format.efi_extents[i]); | |
3656 | startblock_fsb = XFS_BB_TO_FSB(mp, | |
3657 | XFS_FSB_TO_DADDR(mp, extp->ext_start)); | |
3658 | if ((startblock_fsb == 0) || | |
3659 | (extp->ext_len == 0) || | |
3660 | (startblock_fsb >= mp->m_sb.sb_dblocks) || | |
3661 | (extp->ext_len >= mp->m_sb.sb_agblocks)) { | |
3662 | /* | |
3663 | * This will pull the EFI from the AIL and | |
3664 | * free the memory associated with it. | |
3665 | */ | |
666d644c | 3666 | set_bit(XFS_EFI_RECOVERED, &efip->efi_flags); |
1da177e4 | 3667 | xfs_efi_release(efip, efip->efi_format.efi_nextents); |
3c1e2bbe | 3668 | return XFS_ERROR(EIO); |
1da177e4 LT |
3669 | } |
3670 | } | |
3671 | ||
3672 | tp = xfs_trans_alloc(mp, 0); | |
3d3c8b52 | 3673 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0); |
fc6149d8 DC |
3674 | if (error) |
3675 | goto abort_error; | |
1da177e4 LT |
3676 | efdp = xfs_trans_get_efd(tp, efip, efip->efi_format.efi_nextents); |
3677 | ||
3678 | for (i = 0; i < efip->efi_format.efi_nextents; i++) { | |
3679 | extp = &(efip->efi_format.efi_extents[i]); | |
fc6149d8 DC |
3680 | error = xfs_free_extent(tp, extp->ext_start, extp->ext_len); |
3681 | if (error) | |
3682 | goto abort_error; | |
1da177e4 LT |
3683 | xfs_trans_log_efd_extent(tp, efdp, extp->ext_start, |
3684 | extp->ext_len); | |
3685 | } | |
3686 | ||
b199c8a4 | 3687 | set_bit(XFS_EFI_RECOVERED, &efip->efi_flags); |
e5720eec | 3688 | error = xfs_trans_commit(tp, 0); |
3c1e2bbe | 3689 | return error; |
fc6149d8 DC |
3690 | |
3691 | abort_error: | |
3692 | xfs_trans_cancel(tp, XFS_TRANS_ABORT); | |
3693 | return error; | |
1da177e4 LT |
3694 | } |
3695 | ||
1da177e4 LT |
3696 | /* |
3697 | * When this is called, all of the EFIs which did not have | |
3698 | * corresponding EFDs should be in the AIL. What we do now | |
3699 | * is free the extents associated with each one. | |
3700 | * | |
3701 | * Since we process the EFIs in normal transactions, they | |
3702 | * will be removed at some point after the commit. This prevents | |
3703 | * us from just walking down the list processing each one. | |
3704 | * We'll use a flag in the EFI to skip those that we've already | |
3705 | * processed and use the AIL iteration mechanism's generation | |
3706 | * count to try to speed this up at least a bit. | |
3707 | * | |
3708 | * When we start, we know that the EFIs are the only things in | |
3709 | * the AIL. As we process them, however, other items are added | |
3710 | * to the AIL. Since everything added to the AIL must come after | |
3711 | * everything already in the AIL, we stop processing as soon as | |
3712 | * we see something other than an EFI in the AIL. | |
3713 | */ | |
3c1e2bbe | 3714 | STATIC int |
1da177e4 | 3715 | xlog_recover_process_efis( |
9a8d2fdb | 3716 | struct xlog *log) |
1da177e4 LT |
3717 | { |
3718 | xfs_log_item_t *lip; | |
3719 | xfs_efi_log_item_t *efip; | |
3c1e2bbe | 3720 | int error = 0; |
27d8d5fe | 3721 | struct xfs_ail_cursor cur; |
a9c21c1b | 3722 | struct xfs_ail *ailp; |
1da177e4 | 3723 | |
a9c21c1b DC |
3724 | ailp = log->l_ailp; |
3725 | spin_lock(&ailp->xa_lock); | |
3726 | lip = xfs_trans_ail_cursor_first(ailp, &cur, 0); | |
1da177e4 LT |
3727 | while (lip != NULL) { |
3728 | /* | |
3729 | * We're done when we see something other than an EFI. | |
27d8d5fe | 3730 | * There should be no EFIs left in the AIL now. |
1da177e4 LT |
3731 | */ |
3732 | if (lip->li_type != XFS_LI_EFI) { | |
27d8d5fe | 3733 | #ifdef DEBUG |
a9c21c1b | 3734 | for (; lip; lip = xfs_trans_ail_cursor_next(ailp, &cur)) |
27d8d5fe DC |
3735 | ASSERT(lip->li_type != XFS_LI_EFI); |
3736 | #endif | |
1da177e4 LT |
3737 | break; |
3738 | } | |
3739 | ||
3740 | /* | |
3741 | * Skip EFIs that we've already processed. | |
3742 | */ | |
3743 | efip = (xfs_efi_log_item_t *)lip; | |
b199c8a4 | 3744 | if (test_bit(XFS_EFI_RECOVERED, &efip->efi_flags)) { |
a9c21c1b | 3745 | lip = xfs_trans_ail_cursor_next(ailp, &cur); |
1da177e4 LT |
3746 | continue; |
3747 | } | |
3748 | ||
a9c21c1b DC |
3749 | spin_unlock(&ailp->xa_lock); |
3750 | error = xlog_recover_process_efi(log->l_mp, efip); | |
3751 | spin_lock(&ailp->xa_lock); | |
27d8d5fe DC |
3752 | if (error) |
3753 | goto out; | |
a9c21c1b | 3754 | lip = xfs_trans_ail_cursor_next(ailp, &cur); |
1da177e4 | 3755 | } |
27d8d5fe | 3756 | out: |
a9c21c1b DC |
3757 | xfs_trans_ail_cursor_done(ailp, &cur); |
3758 | spin_unlock(&ailp->xa_lock); | |
3c1e2bbe | 3759 | return error; |
1da177e4 LT |
3760 | } |
3761 | ||
3762 | /* | |
3763 | * This routine performs a transaction to null out a bad inode pointer | |
3764 | * in an agi unlinked inode hash bucket. | |
3765 | */ | |
3766 | STATIC void | |
3767 | xlog_recover_clear_agi_bucket( | |
3768 | xfs_mount_t *mp, | |
3769 | xfs_agnumber_t agno, | |
3770 | int bucket) | |
3771 | { | |
3772 | xfs_trans_t *tp; | |
3773 | xfs_agi_t *agi; | |
3774 | xfs_buf_t *agibp; | |
3775 | int offset; | |
3776 | int error; | |
3777 | ||
3778 | tp = xfs_trans_alloc(mp, XFS_TRANS_CLEAR_AGI_BUCKET); | |
3d3c8b52 | 3779 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_clearagi, 0, 0); |
e5720eec DC |
3780 | if (error) |
3781 | goto out_abort; | |
1da177e4 | 3782 | |
5e1be0fb CH |
3783 | error = xfs_read_agi(mp, tp, agno, &agibp); |
3784 | if (error) | |
e5720eec | 3785 | goto out_abort; |
1da177e4 | 3786 | |
5e1be0fb | 3787 | agi = XFS_BUF_TO_AGI(agibp); |
16259e7d | 3788 | agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO); |
1da177e4 LT |
3789 | offset = offsetof(xfs_agi_t, agi_unlinked) + |
3790 | (sizeof(xfs_agino_t) * bucket); | |
3791 | xfs_trans_log_buf(tp, agibp, offset, | |
3792 | (offset + sizeof(xfs_agino_t) - 1)); | |
3793 | ||
e5720eec DC |
3794 | error = xfs_trans_commit(tp, 0); |
3795 | if (error) | |
3796 | goto out_error; | |
3797 | return; | |
3798 | ||
3799 | out_abort: | |
3800 | xfs_trans_cancel(tp, XFS_TRANS_ABORT); | |
3801 | out_error: | |
a0fa2b67 | 3802 | xfs_warn(mp, "%s: failed to clear agi %d. Continuing.", __func__, agno); |
e5720eec | 3803 | return; |
1da177e4 LT |
3804 | } |
3805 | ||
23fac50f CH |
3806 | STATIC xfs_agino_t |
3807 | xlog_recover_process_one_iunlink( | |
3808 | struct xfs_mount *mp, | |
3809 | xfs_agnumber_t agno, | |
3810 | xfs_agino_t agino, | |
3811 | int bucket) | |
3812 | { | |
3813 | struct xfs_buf *ibp; | |
3814 | struct xfs_dinode *dip; | |
3815 | struct xfs_inode *ip; | |
3816 | xfs_ino_t ino; | |
3817 | int error; | |
3818 | ||
3819 | ino = XFS_AGINO_TO_INO(mp, agno, agino); | |
7b6259e7 | 3820 | error = xfs_iget(mp, NULL, ino, 0, 0, &ip); |
23fac50f CH |
3821 | if (error) |
3822 | goto fail; | |
3823 | ||
3824 | /* | |
3825 | * Get the on disk inode to find the next inode in the bucket. | |
3826 | */ | |
475ee413 | 3827 | error = xfs_imap_to_bp(mp, NULL, &ip->i_imap, &dip, &ibp, 0, 0); |
23fac50f | 3828 | if (error) |
0e446673 | 3829 | goto fail_iput; |
23fac50f | 3830 | |
23fac50f | 3831 | ASSERT(ip->i_d.di_nlink == 0); |
0e446673 | 3832 | ASSERT(ip->i_d.di_mode != 0); |
23fac50f CH |
3833 | |
3834 | /* setup for the next pass */ | |
3835 | agino = be32_to_cpu(dip->di_next_unlinked); | |
3836 | xfs_buf_relse(ibp); | |
3837 | ||
3838 | /* | |
3839 | * Prevent any DMAPI event from being sent when the reference on | |
3840 | * the inode is dropped. | |
3841 | */ | |
3842 | ip->i_d.di_dmevmask = 0; | |
3843 | ||
0e446673 | 3844 | IRELE(ip); |
23fac50f CH |
3845 | return agino; |
3846 | ||
0e446673 CH |
3847 | fail_iput: |
3848 | IRELE(ip); | |
23fac50f CH |
3849 | fail: |
3850 | /* | |
3851 | * We can't read in the inode this bucket points to, or this inode | |
3852 | * is messed up. Just ditch this bucket of inodes. We will lose | |
3853 | * some inodes and space, but at least we won't hang. | |
3854 | * | |
3855 | * Call xlog_recover_clear_agi_bucket() to perform a transaction to | |
3856 | * clear the inode pointer in the bucket. | |
3857 | */ | |
3858 | xlog_recover_clear_agi_bucket(mp, agno, bucket); | |
3859 | return NULLAGINO; | |
3860 | } | |
3861 | ||
1da177e4 LT |
3862 | /* |
3863 | * xlog_iunlink_recover | |
3864 | * | |
3865 | * This is called during recovery to process any inodes which | |
3866 | * we unlinked but not freed when the system crashed. These | |
3867 | * inodes will be on the lists in the AGI blocks. What we do | |
3868 | * here is scan all the AGIs and fully truncate and free any | |
3869 | * inodes found on the lists. Each inode is removed from the | |
3870 | * lists when it has been fully truncated and is freed. The | |
3871 | * freeing of the inode and its removal from the list must be | |
3872 | * atomic. | |
3873 | */ | |
d96f8f89 | 3874 | STATIC void |
1da177e4 | 3875 | xlog_recover_process_iunlinks( |
9a8d2fdb | 3876 | struct xlog *log) |
1da177e4 LT |
3877 | { |
3878 | xfs_mount_t *mp; | |
3879 | xfs_agnumber_t agno; | |
3880 | xfs_agi_t *agi; | |
3881 | xfs_buf_t *agibp; | |
1da177e4 | 3882 | xfs_agino_t agino; |
1da177e4 LT |
3883 | int bucket; |
3884 | int error; | |
3885 | uint mp_dmevmask; | |
3886 | ||
3887 | mp = log->l_mp; | |
3888 | ||
3889 | /* | |
3890 | * Prevent any DMAPI event from being sent while in this function. | |
3891 | */ | |
3892 | mp_dmevmask = mp->m_dmevmask; | |
3893 | mp->m_dmevmask = 0; | |
3894 | ||
3895 | for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) { | |
3896 | /* | |
3897 | * Find the agi for this ag. | |
3898 | */ | |
5e1be0fb CH |
3899 | error = xfs_read_agi(mp, NULL, agno, &agibp); |
3900 | if (error) { | |
3901 | /* | |
3902 | * AGI is b0rked. Don't process it. | |
3903 | * | |
3904 | * We should probably mark the filesystem as corrupt | |
3905 | * after we've recovered all the ag's we can.... | |
3906 | */ | |
3907 | continue; | |
1da177e4 | 3908 | } |
d97d32ed JK |
3909 | /* |
3910 | * Unlock the buffer so that it can be acquired in the normal | |
3911 | * course of the transaction to truncate and free each inode. | |
3912 | * Because we are not racing with anyone else here for the AGI | |
3913 | * buffer, we don't even need to hold it locked to read the | |
3914 | * initial unlinked bucket entries out of the buffer. We keep | |
3915 | * buffer reference though, so that it stays pinned in memory | |
3916 | * while we need the buffer. | |
3917 | */ | |
1da177e4 | 3918 | agi = XFS_BUF_TO_AGI(agibp); |
d97d32ed | 3919 | xfs_buf_unlock(agibp); |
1da177e4 LT |
3920 | |
3921 | for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++) { | |
16259e7d | 3922 | agino = be32_to_cpu(agi->agi_unlinked[bucket]); |
1da177e4 | 3923 | while (agino != NULLAGINO) { |
23fac50f CH |
3924 | agino = xlog_recover_process_one_iunlink(mp, |
3925 | agno, agino, bucket); | |
1da177e4 LT |
3926 | } |
3927 | } | |
d97d32ed | 3928 | xfs_buf_rele(agibp); |
1da177e4 LT |
3929 | } |
3930 | ||
3931 | mp->m_dmevmask = mp_dmevmask; | |
3932 | } | |
3933 | ||
1da177e4 | 3934 | /* |
0e446be4 CH |
3935 | * Upack the log buffer data and crc check it. If the check fails, issue a |
3936 | * warning if and only if the CRC in the header is non-zero. This makes the | |
3937 | * check an advisory warning, and the zero CRC check will prevent failure | |
3938 | * warnings from being emitted when upgrading the kernel from one that does not | |
3939 | * add CRCs by default. | |
3940 | * | |
3941 | * When filesystems are CRC enabled, this CRC mismatch becomes a fatal log | |
3942 | * corruption failure | |
1da177e4 | 3943 | */ |
0e446be4 CH |
3944 | STATIC int |
3945 | xlog_unpack_data_crc( | |
3946 | struct xlog_rec_header *rhead, | |
3947 | xfs_caddr_t dp, | |
3948 | struct xlog *log) | |
1da177e4 | 3949 | { |
f9668a09 | 3950 | __le32 crc; |
0e446be4 CH |
3951 | |
3952 | crc = xlog_cksum(log, rhead, dp, be32_to_cpu(rhead->h_len)); | |
3953 | if (crc != rhead->h_crc) { | |
3954 | if (rhead->h_crc || xfs_sb_version_hascrc(&log->l_mp->m_sb)) { | |
3955 | xfs_alert(log->l_mp, | |
08e96e1a | 3956 | "log record CRC mismatch: found 0x%x, expected 0x%x.", |
f9668a09 DC |
3957 | le32_to_cpu(rhead->h_crc), |
3958 | le32_to_cpu(crc)); | |
0e446be4 | 3959 | xfs_hex_dump(dp, 32); |
1da177e4 LT |
3960 | } |
3961 | ||
0e446be4 CH |
3962 | /* |
3963 | * If we've detected a log record corruption, then we can't | |
3964 | * recover past this point. Abort recovery if we are enforcing | |
3965 | * CRC protection by punting an error back up the stack. | |
3966 | */ | |
3967 | if (xfs_sb_version_hascrc(&log->l_mp->m_sb)) | |
3968 | return EFSCORRUPTED; | |
1da177e4 | 3969 | } |
0e446be4 CH |
3970 | |
3971 | return 0; | |
1da177e4 LT |
3972 | } |
3973 | ||
0e446be4 | 3974 | STATIC int |
1da177e4 | 3975 | xlog_unpack_data( |
9a8d2fdb | 3976 | struct xlog_rec_header *rhead, |
1da177e4 | 3977 | xfs_caddr_t dp, |
9a8d2fdb | 3978 | struct xlog *log) |
1da177e4 LT |
3979 | { |
3980 | int i, j, k; | |
0e446be4 CH |
3981 | int error; |
3982 | ||
3983 | error = xlog_unpack_data_crc(rhead, dp, log); | |
3984 | if (error) | |
3985 | return error; | |
1da177e4 | 3986 | |
b53e675d | 3987 | for (i = 0; i < BTOBB(be32_to_cpu(rhead->h_len)) && |
1da177e4 | 3988 | i < (XLOG_HEADER_CYCLE_SIZE / BBSIZE); i++) { |
b53e675d | 3989 | *(__be32 *)dp = *(__be32 *)&rhead->h_cycle_data[i]; |
1da177e4 LT |
3990 | dp += BBSIZE; |
3991 | } | |
3992 | ||
62118709 | 3993 | if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { |
b28708d6 | 3994 | xlog_in_core_2_t *xhdr = (xlog_in_core_2_t *)rhead; |
b53e675d | 3995 | for ( ; i < BTOBB(be32_to_cpu(rhead->h_len)); i++) { |
1da177e4 LT |
3996 | j = i / (XLOG_HEADER_CYCLE_SIZE / BBSIZE); |
3997 | k = i % (XLOG_HEADER_CYCLE_SIZE / BBSIZE); | |
b53e675d | 3998 | *(__be32 *)dp = xhdr[j].hic_xheader.xh_cycle_data[k]; |
1da177e4 LT |
3999 | dp += BBSIZE; |
4000 | } | |
4001 | } | |
0e446be4 CH |
4002 | |
4003 | return 0; | |
1da177e4 LT |
4004 | } |
4005 | ||
4006 | STATIC int | |
4007 | xlog_valid_rec_header( | |
9a8d2fdb MT |
4008 | struct xlog *log, |
4009 | struct xlog_rec_header *rhead, | |
1da177e4 LT |
4010 | xfs_daddr_t blkno) |
4011 | { | |
4012 | int hlen; | |
4013 | ||
69ef921b | 4014 | if (unlikely(rhead->h_magicno != cpu_to_be32(XLOG_HEADER_MAGIC_NUM))) { |
1da177e4 LT |
4015 | XFS_ERROR_REPORT("xlog_valid_rec_header(1)", |
4016 | XFS_ERRLEVEL_LOW, log->l_mp); | |
4017 | return XFS_ERROR(EFSCORRUPTED); | |
4018 | } | |
4019 | if (unlikely( | |
4020 | (!rhead->h_version || | |
b53e675d | 4021 | (be32_to_cpu(rhead->h_version) & (~XLOG_VERSION_OKBITS))))) { |
a0fa2b67 | 4022 | xfs_warn(log->l_mp, "%s: unrecognised log version (%d).", |
34a622b2 | 4023 | __func__, be32_to_cpu(rhead->h_version)); |
1da177e4 LT |
4024 | return XFS_ERROR(EIO); |
4025 | } | |
4026 | ||
4027 | /* LR body must have data or it wouldn't have been written */ | |
b53e675d | 4028 | hlen = be32_to_cpu(rhead->h_len); |
1da177e4 LT |
4029 | if (unlikely( hlen <= 0 || hlen > INT_MAX )) { |
4030 | XFS_ERROR_REPORT("xlog_valid_rec_header(2)", | |
4031 | XFS_ERRLEVEL_LOW, log->l_mp); | |
4032 | return XFS_ERROR(EFSCORRUPTED); | |
4033 | } | |
4034 | if (unlikely( blkno > log->l_logBBsize || blkno > INT_MAX )) { | |
4035 | XFS_ERROR_REPORT("xlog_valid_rec_header(3)", | |
4036 | XFS_ERRLEVEL_LOW, log->l_mp); | |
4037 | return XFS_ERROR(EFSCORRUPTED); | |
4038 | } | |
4039 | return 0; | |
4040 | } | |
4041 | ||
4042 | /* | |
4043 | * Read the log from tail to head and process the log records found. | |
4044 | * Handle the two cases where the tail and head are in the same cycle | |
4045 | * and where the active portion of the log wraps around the end of | |
4046 | * the physical log separately. The pass parameter is passed through | |
4047 | * to the routines called to process the data and is not looked at | |
4048 | * here. | |
4049 | */ | |
4050 | STATIC int | |
4051 | xlog_do_recovery_pass( | |
9a8d2fdb | 4052 | struct xlog *log, |
1da177e4 LT |
4053 | xfs_daddr_t head_blk, |
4054 | xfs_daddr_t tail_blk, | |
4055 | int pass) | |
4056 | { | |
4057 | xlog_rec_header_t *rhead; | |
4058 | xfs_daddr_t blk_no; | |
fc5bc4c8 | 4059 | xfs_caddr_t offset; |
1da177e4 LT |
4060 | xfs_buf_t *hbp, *dbp; |
4061 | int error = 0, h_size; | |
4062 | int bblks, split_bblks; | |
4063 | int hblks, split_hblks, wrapped_hblks; | |
f0a76953 | 4064 | struct hlist_head rhash[XLOG_RHASH_SIZE]; |
1da177e4 LT |
4065 | |
4066 | ASSERT(head_blk != tail_blk); | |
4067 | ||
4068 | /* | |
4069 | * Read the header of the tail block and get the iclog buffer size from | |
4070 | * h_size. Use this to tell how many sectors make up the log header. | |
4071 | */ | |
62118709 | 4072 | if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { |
1da177e4 LT |
4073 | /* |
4074 | * When using variable length iclogs, read first sector of | |
4075 | * iclog header and extract the header size from it. Get a | |
4076 | * new hbp that is the correct size. | |
4077 | */ | |
4078 | hbp = xlog_get_bp(log, 1); | |
4079 | if (!hbp) | |
4080 | return ENOMEM; | |
076e6acb CH |
4081 | |
4082 | error = xlog_bread(log, tail_blk, 1, hbp, &offset); | |
4083 | if (error) | |
1da177e4 | 4084 | goto bread_err1; |
076e6acb | 4085 | |
1da177e4 LT |
4086 | rhead = (xlog_rec_header_t *)offset; |
4087 | error = xlog_valid_rec_header(log, rhead, tail_blk); | |
4088 | if (error) | |
4089 | goto bread_err1; | |
b53e675d CH |
4090 | h_size = be32_to_cpu(rhead->h_size); |
4091 | if ((be32_to_cpu(rhead->h_version) & XLOG_VERSION_2) && | |
1da177e4 LT |
4092 | (h_size > XLOG_HEADER_CYCLE_SIZE)) { |
4093 | hblks = h_size / XLOG_HEADER_CYCLE_SIZE; | |
4094 | if (h_size % XLOG_HEADER_CYCLE_SIZE) | |
4095 | hblks++; | |
4096 | xlog_put_bp(hbp); | |
4097 | hbp = xlog_get_bp(log, hblks); | |
4098 | } else { | |
4099 | hblks = 1; | |
4100 | } | |
4101 | } else { | |
69ce58f0 | 4102 | ASSERT(log->l_sectBBsize == 1); |
1da177e4 LT |
4103 | hblks = 1; |
4104 | hbp = xlog_get_bp(log, 1); | |
4105 | h_size = XLOG_BIG_RECORD_BSIZE; | |
4106 | } | |
4107 | ||
4108 | if (!hbp) | |
4109 | return ENOMEM; | |
4110 | dbp = xlog_get_bp(log, BTOBB(h_size)); | |
4111 | if (!dbp) { | |
4112 | xlog_put_bp(hbp); | |
4113 | return ENOMEM; | |
4114 | } | |
4115 | ||
4116 | memset(rhash, 0, sizeof(rhash)); | |
4117 | if (tail_blk <= head_blk) { | |
4118 | for (blk_no = tail_blk; blk_no < head_blk; ) { | |
076e6acb CH |
4119 | error = xlog_bread(log, blk_no, hblks, hbp, &offset); |
4120 | if (error) | |
1da177e4 | 4121 | goto bread_err2; |
076e6acb | 4122 | |
1da177e4 LT |
4123 | rhead = (xlog_rec_header_t *)offset; |
4124 | error = xlog_valid_rec_header(log, rhead, blk_no); | |
4125 | if (error) | |
4126 | goto bread_err2; | |
4127 | ||
4128 | /* blocks in data section */ | |
b53e675d | 4129 | bblks = (int)BTOBB(be32_to_cpu(rhead->h_len)); |
076e6acb CH |
4130 | error = xlog_bread(log, blk_no + hblks, bblks, dbp, |
4131 | &offset); | |
1da177e4 LT |
4132 | if (error) |
4133 | goto bread_err2; | |
076e6acb | 4134 | |
0e446be4 CH |
4135 | error = xlog_unpack_data(rhead, offset, log); |
4136 | if (error) | |
4137 | goto bread_err2; | |
4138 | ||
4139 | error = xlog_recover_process_data(log, | |
4140 | rhash, rhead, offset, pass); | |
4141 | if (error) | |
1da177e4 LT |
4142 | goto bread_err2; |
4143 | blk_no += bblks + hblks; | |
4144 | } | |
4145 | } else { | |
4146 | /* | |
4147 | * Perform recovery around the end of the physical log. | |
4148 | * When the head is not on the same cycle number as the tail, | |
4149 | * we can't do a sequential recovery as above. | |
4150 | */ | |
4151 | blk_no = tail_blk; | |
4152 | while (blk_no < log->l_logBBsize) { | |
4153 | /* | |
4154 | * Check for header wrapping around physical end-of-log | |
4155 | */ | |
62926044 | 4156 | offset = hbp->b_addr; |
1da177e4 LT |
4157 | split_hblks = 0; |
4158 | wrapped_hblks = 0; | |
4159 | if (blk_no + hblks <= log->l_logBBsize) { | |
4160 | /* Read header in one read */ | |
076e6acb CH |
4161 | error = xlog_bread(log, blk_no, hblks, hbp, |
4162 | &offset); | |
1da177e4 LT |
4163 | if (error) |
4164 | goto bread_err2; | |
1da177e4 LT |
4165 | } else { |
4166 | /* This LR is split across physical log end */ | |
4167 | if (blk_no != log->l_logBBsize) { | |
4168 | /* some data before physical log end */ | |
4169 | ASSERT(blk_no <= INT_MAX); | |
4170 | split_hblks = log->l_logBBsize - (int)blk_no; | |
4171 | ASSERT(split_hblks > 0); | |
076e6acb CH |
4172 | error = xlog_bread(log, blk_no, |
4173 | split_hblks, hbp, | |
4174 | &offset); | |
4175 | if (error) | |
1da177e4 | 4176 | goto bread_err2; |
1da177e4 | 4177 | } |
076e6acb | 4178 | |
1da177e4 LT |
4179 | /* |
4180 | * Note: this black magic still works with | |
4181 | * large sector sizes (non-512) only because: | |
4182 | * - we increased the buffer size originally | |
4183 | * by 1 sector giving us enough extra space | |
4184 | * for the second read; | |
4185 | * - the log start is guaranteed to be sector | |
4186 | * aligned; | |
4187 | * - we read the log end (LR header start) | |
4188 | * _first_, then the log start (LR header end) | |
4189 | * - order is important. | |
4190 | */ | |
234f56ac | 4191 | wrapped_hblks = hblks - split_hblks; |
44396476 DC |
4192 | error = xlog_bread_offset(log, 0, |
4193 | wrapped_hblks, hbp, | |
4194 | offset + BBTOB(split_hblks)); | |
1da177e4 LT |
4195 | if (error) |
4196 | goto bread_err2; | |
1da177e4 LT |
4197 | } |
4198 | rhead = (xlog_rec_header_t *)offset; | |
4199 | error = xlog_valid_rec_header(log, rhead, | |
4200 | split_hblks ? blk_no : 0); | |
4201 | if (error) | |
4202 | goto bread_err2; | |
4203 | ||
b53e675d | 4204 | bblks = (int)BTOBB(be32_to_cpu(rhead->h_len)); |
1da177e4 LT |
4205 | blk_no += hblks; |
4206 | ||
4207 | /* Read in data for log record */ | |
4208 | if (blk_no + bblks <= log->l_logBBsize) { | |
076e6acb CH |
4209 | error = xlog_bread(log, blk_no, bblks, dbp, |
4210 | &offset); | |
1da177e4 LT |
4211 | if (error) |
4212 | goto bread_err2; | |
1da177e4 LT |
4213 | } else { |
4214 | /* This log record is split across the | |
4215 | * physical end of log */ | |
62926044 | 4216 | offset = dbp->b_addr; |
1da177e4 LT |
4217 | split_bblks = 0; |
4218 | if (blk_no != log->l_logBBsize) { | |
4219 | /* some data is before the physical | |
4220 | * end of log */ | |
4221 | ASSERT(!wrapped_hblks); | |
4222 | ASSERT(blk_no <= INT_MAX); | |
4223 | split_bblks = | |
4224 | log->l_logBBsize - (int)blk_no; | |
4225 | ASSERT(split_bblks > 0); | |
076e6acb CH |
4226 | error = xlog_bread(log, blk_no, |
4227 | split_bblks, dbp, | |
4228 | &offset); | |
4229 | if (error) | |
1da177e4 | 4230 | goto bread_err2; |
1da177e4 | 4231 | } |
076e6acb | 4232 | |
1da177e4 LT |
4233 | /* |
4234 | * Note: this black magic still works with | |
4235 | * large sector sizes (non-512) only because: | |
4236 | * - we increased the buffer size originally | |
4237 | * by 1 sector giving us enough extra space | |
4238 | * for the second read; | |
4239 | * - the log start is guaranteed to be sector | |
4240 | * aligned; | |
4241 | * - we read the log end (LR header start) | |
4242 | * _first_, then the log start (LR header end) | |
4243 | * - order is important. | |
4244 | */ | |
44396476 | 4245 | error = xlog_bread_offset(log, 0, |
009507b0 | 4246 | bblks - split_bblks, dbp, |
44396476 | 4247 | offset + BBTOB(split_bblks)); |
076e6acb CH |
4248 | if (error) |
4249 | goto bread_err2; | |
1da177e4 | 4250 | } |
0e446be4 CH |
4251 | |
4252 | error = xlog_unpack_data(rhead, offset, log); | |
4253 | if (error) | |
4254 | goto bread_err2; | |
4255 | ||
4256 | error = xlog_recover_process_data(log, rhash, | |
4257 | rhead, offset, pass); | |
4258 | if (error) | |
1da177e4 LT |
4259 | goto bread_err2; |
4260 | blk_no += bblks; | |
4261 | } | |
4262 | ||
4263 | ASSERT(blk_no >= log->l_logBBsize); | |
4264 | blk_no -= log->l_logBBsize; | |
4265 | ||
4266 | /* read first part of physical log */ | |
4267 | while (blk_no < head_blk) { | |
076e6acb CH |
4268 | error = xlog_bread(log, blk_no, hblks, hbp, &offset); |
4269 | if (error) | |
1da177e4 | 4270 | goto bread_err2; |
076e6acb | 4271 | |
1da177e4 LT |
4272 | rhead = (xlog_rec_header_t *)offset; |
4273 | error = xlog_valid_rec_header(log, rhead, blk_no); | |
4274 | if (error) | |
4275 | goto bread_err2; | |
076e6acb | 4276 | |
b53e675d | 4277 | bblks = (int)BTOBB(be32_to_cpu(rhead->h_len)); |
076e6acb CH |
4278 | error = xlog_bread(log, blk_no+hblks, bblks, dbp, |
4279 | &offset); | |
4280 | if (error) | |
1da177e4 | 4281 | goto bread_err2; |
076e6acb | 4282 | |
0e446be4 CH |
4283 | error = xlog_unpack_data(rhead, offset, log); |
4284 | if (error) | |
4285 | goto bread_err2; | |
4286 | ||
4287 | error = xlog_recover_process_data(log, rhash, | |
4288 | rhead, offset, pass); | |
4289 | if (error) | |
1da177e4 LT |
4290 | goto bread_err2; |
4291 | blk_no += bblks + hblks; | |
4292 | } | |
4293 | } | |
4294 | ||
4295 | bread_err2: | |
4296 | xlog_put_bp(dbp); | |
4297 | bread_err1: | |
4298 | xlog_put_bp(hbp); | |
4299 | return error; | |
4300 | } | |
4301 | ||
4302 | /* | |
4303 | * Do the recovery of the log. We actually do this in two phases. | |
4304 | * The two passes are necessary in order to implement the function | |
4305 | * of cancelling a record written into the log. The first pass | |
4306 | * determines those things which have been cancelled, and the | |
4307 | * second pass replays log items normally except for those which | |
4308 | * have been cancelled. The handling of the replay and cancellations | |
4309 | * takes place in the log item type specific routines. | |
4310 | * | |
4311 | * The table of items which have cancel records in the log is allocated | |
4312 | * and freed at this level, since only here do we know when all of | |
4313 | * the log recovery has been completed. | |
4314 | */ | |
4315 | STATIC int | |
4316 | xlog_do_log_recovery( | |
9a8d2fdb | 4317 | struct xlog *log, |
1da177e4 LT |
4318 | xfs_daddr_t head_blk, |
4319 | xfs_daddr_t tail_blk) | |
4320 | { | |
d5689eaa | 4321 | int error, i; |
1da177e4 LT |
4322 | |
4323 | ASSERT(head_blk != tail_blk); | |
4324 | ||
4325 | /* | |
4326 | * First do a pass to find all of the cancelled buf log items. | |
4327 | * Store them in the buf_cancel_table for use in the second pass. | |
4328 | */ | |
d5689eaa CH |
4329 | log->l_buf_cancel_table = kmem_zalloc(XLOG_BC_TABLE_SIZE * |
4330 | sizeof(struct list_head), | |
1da177e4 | 4331 | KM_SLEEP); |
d5689eaa CH |
4332 | for (i = 0; i < XLOG_BC_TABLE_SIZE; i++) |
4333 | INIT_LIST_HEAD(&log->l_buf_cancel_table[i]); | |
4334 | ||
1da177e4 LT |
4335 | error = xlog_do_recovery_pass(log, head_blk, tail_blk, |
4336 | XLOG_RECOVER_PASS1); | |
4337 | if (error != 0) { | |
f0e2d93c | 4338 | kmem_free(log->l_buf_cancel_table); |
1da177e4 LT |
4339 | log->l_buf_cancel_table = NULL; |
4340 | return error; | |
4341 | } | |
4342 | /* | |
4343 | * Then do a second pass to actually recover the items in the log. | |
4344 | * When it is complete free the table of buf cancel items. | |
4345 | */ | |
4346 | error = xlog_do_recovery_pass(log, head_blk, tail_blk, | |
4347 | XLOG_RECOVER_PASS2); | |
4348 | #ifdef DEBUG | |
6d192a9b | 4349 | if (!error) { |
1da177e4 LT |
4350 | int i; |
4351 | ||
4352 | for (i = 0; i < XLOG_BC_TABLE_SIZE; i++) | |
d5689eaa | 4353 | ASSERT(list_empty(&log->l_buf_cancel_table[i])); |
1da177e4 LT |
4354 | } |
4355 | #endif /* DEBUG */ | |
4356 | ||
f0e2d93c | 4357 | kmem_free(log->l_buf_cancel_table); |
1da177e4 LT |
4358 | log->l_buf_cancel_table = NULL; |
4359 | ||
4360 | return error; | |
4361 | } | |
4362 | ||
4363 | /* | |
4364 | * Do the actual recovery | |
4365 | */ | |
4366 | STATIC int | |
4367 | xlog_do_recover( | |
9a8d2fdb | 4368 | struct xlog *log, |
1da177e4 LT |
4369 | xfs_daddr_t head_blk, |
4370 | xfs_daddr_t tail_blk) | |
4371 | { | |
4372 | int error; | |
4373 | xfs_buf_t *bp; | |
4374 | xfs_sb_t *sbp; | |
4375 | ||
4376 | /* | |
4377 | * First replay the images in the log. | |
4378 | */ | |
4379 | error = xlog_do_log_recovery(log, head_blk, tail_blk); | |
43ff2122 | 4380 | if (error) |
1da177e4 | 4381 | return error; |
1da177e4 LT |
4382 | |
4383 | /* | |
4384 | * If IO errors happened during recovery, bail out. | |
4385 | */ | |
4386 | if (XFS_FORCED_SHUTDOWN(log->l_mp)) { | |
4387 | return (EIO); | |
4388 | } | |
4389 | ||
4390 | /* | |
4391 | * We now update the tail_lsn since much of the recovery has completed | |
4392 | * and there may be space available to use. If there were no extent | |
4393 | * or iunlinks, we can free up the entire log and set the tail_lsn to | |
4394 | * be the last_sync_lsn. This was set in xlog_find_tail to be the | |
4395 | * lsn of the last known good LR on disk. If there are extent frees | |
4396 | * or iunlinks they will have some entries in the AIL; so we look at | |
4397 | * the AIL to determine how to set the tail_lsn. | |
4398 | */ | |
4399 | xlog_assign_tail_lsn(log->l_mp); | |
4400 | ||
4401 | /* | |
4402 | * Now that we've finished replaying all buffer and inode | |
98021821 | 4403 | * updates, re-read in the superblock and reverify it. |
1da177e4 LT |
4404 | */ |
4405 | bp = xfs_getsb(log->l_mp, 0); | |
4406 | XFS_BUF_UNDONE(bp); | |
bebf963f | 4407 | ASSERT(!(XFS_BUF_ISWRITE(bp))); |
1da177e4 | 4408 | XFS_BUF_READ(bp); |
bebf963f | 4409 | XFS_BUF_UNASYNC(bp); |
1813dd64 | 4410 | bp->b_ops = &xfs_sb_buf_ops; |
1da177e4 | 4411 | xfsbdstrat(log->l_mp, bp); |
1a1a3e97 | 4412 | error = xfs_buf_iowait(bp); |
d64e31a2 | 4413 | if (error) { |
901796af | 4414 | xfs_buf_ioerror_alert(bp, __func__); |
1da177e4 LT |
4415 | ASSERT(0); |
4416 | xfs_buf_relse(bp); | |
4417 | return error; | |
4418 | } | |
4419 | ||
4420 | /* Convert superblock from on-disk format */ | |
4421 | sbp = &log->l_mp->m_sb; | |
98021821 | 4422 | xfs_sb_from_disk(sbp, XFS_BUF_TO_SBP(bp)); |
1da177e4 | 4423 | ASSERT(sbp->sb_magicnum == XFS_SB_MAGIC); |
62118709 | 4424 | ASSERT(xfs_sb_good_version(sbp)); |
1da177e4 LT |
4425 | xfs_buf_relse(bp); |
4426 | ||
5478eead LM |
4427 | /* We've re-read the superblock so re-initialize per-cpu counters */ |
4428 | xfs_icsb_reinit_counters(log->l_mp); | |
4429 | ||
1da177e4 LT |
4430 | xlog_recover_check_summary(log); |
4431 | ||
4432 | /* Normal transactions can now occur */ | |
4433 | log->l_flags &= ~XLOG_ACTIVE_RECOVERY; | |
4434 | return 0; | |
4435 | } | |
4436 | ||
4437 | /* | |
4438 | * Perform recovery and re-initialize some log variables in xlog_find_tail. | |
4439 | * | |
4440 | * Return error or zero. | |
4441 | */ | |
4442 | int | |
4443 | xlog_recover( | |
9a8d2fdb | 4444 | struct xlog *log) |
1da177e4 LT |
4445 | { |
4446 | xfs_daddr_t head_blk, tail_blk; | |
4447 | int error; | |
4448 | ||
4449 | /* find the tail of the log */ | |
65be6054 | 4450 | if ((error = xlog_find_tail(log, &head_blk, &tail_blk))) |
1da177e4 LT |
4451 | return error; |
4452 | ||
4453 | if (tail_blk != head_blk) { | |
4454 | /* There used to be a comment here: | |
4455 | * | |
4456 | * disallow recovery on read-only mounts. note -- mount | |
4457 | * checks for ENOSPC and turns it into an intelligent | |
4458 | * error message. | |
4459 | * ...but this is no longer true. Now, unless you specify | |
4460 | * NORECOVERY (in which case this function would never be | |
4461 | * called), we just go ahead and recover. We do this all | |
4462 | * under the vfs layer, so we can get away with it unless | |
4463 | * the device itself is read-only, in which case we fail. | |
4464 | */ | |
3a02ee18 | 4465 | if ((error = xfs_dev_is_read_only(log->l_mp, "recovery"))) { |
1da177e4 LT |
4466 | return error; |
4467 | } | |
4468 | ||
e721f504 DC |
4469 | /* |
4470 | * Version 5 superblock log feature mask validation. We know the | |
4471 | * log is dirty so check if there are any unknown log features | |
4472 | * in what we need to recover. If there are unknown features | |
4473 | * (e.g. unsupported transactions, then simply reject the | |
4474 | * attempt at recovery before touching anything. | |
4475 | */ | |
4476 | if (XFS_SB_VERSION_NUM(&log->l_mp->m_sb) == XFS_SB_VERSION_5 && | |
4477 | xfs_sb_has_incompat_log_feature(&log->l_mp->m_sb, | |
4478 | XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)) { | |
4479 | xfs_warn(log->l_mp, | |
4480 | "Superblock has unknown incompatible log features (0x%x) enabled.\n" | |
4481 | "The log can not be fully and/or safely recovered by this kernel.\n" | |
4482 | "Please recover the log on a kernel that supports the unknown features.", | |
4483 | (log->l_mp->m_sb.sb_features_log_incompat & | |
4484 | XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)); | |
4485 | return EINVAL; | |
4486 | } | |
4487 | ||
a0fa2b67 DC |
4488 | xfs_notice(log->l_mp, "Starting recovery (logdev: %s)", |
4489 | log->l_mp->m_logname ? log->l_mp->m_logname | |
4490 | : "internal"); | |
1da177e4 LT |
4491 | |
4492 | error = xlog_do_recover(log, head_blk, tail_blk); | |
4493 | log->l_flags |= XLOG_RECOVERY_NEEDED; | |
4494 | } | |
4495 | return error; | |
4496 | } | |
4497 | ||
4498 | /* | |
4499 | * In the first part of recovery we replay inodes and buffers and build | |
4500 | * up the list of extent free items which need to be processed. Here | |
4501 | * we process the extent free items and clean up the on disk unlinked | |
4502 | * inode lists. This is separated from the first part of recovery so | |
4503 | * that the root and real-time bitmap inodes can be read in from disk in | |
4504 | * between the two stages. This is necessary so that we can free space | |
4505 | * in the real-time portion of the file system. | |
4506 | */ | |
4507 | int | |
4508 | xlog_recover_finish( | |
9a8d2fdb | 4509 | struct xlog *log) |
1da177e4 LT |
4510 | { |
4511 | /* | |
4512 | * Now we're ready to do the transactions needed for the | |
4513 | * rest of recovery. Start with completing all the extent | |
4514 | * free intent records and then process the unlinked inode | |
4515 | * lists. At this point, we essentially run in normal mode | |
4516 | * except that we're still performing recovery actions | |
4517 | * rather than accepting new requests. | |
4518 | */ | |
4519 | if (log->l_flags & XLOG_RECOVERY_NEEDED) { | |
3c1e2bbe DC |
4520 | int error; |
4521 | error = xlog_recover_process_efis(log); | |
4522 | if (error) { | |
a0fa2b67 | 4523 | xfs_alert(log->l_mp, "Failed to recover EFIs"); |
3c1e2bbe DC |
4524 | return error; |
4525 | } | |
1da177e4 LT |
4526 | /* |
4527 | * Sync the log to get all the EFIs out of the AIL. | |
4528 | * This isn't absolutely necessary, but it helps in | |
4529 | * case the unlink transactions would have problems | |
4530 | * pushing the EFIs out of the way. | |
4531 | */ | |
a14a348b | 4532 | xfs_log_force(log->l_mp, XFS_LOG_SYNC); |
1da177e4 | 4533 | |
4249023a | 4534 | xlog_recover_process_iunlinks(log); |
1da177e4 LT |
4535 | |
4536 | xlog_recover_check_summary(log); | |
4537 | ||
a0fa2b67 DC |
4538 | xfs_notice(log->l_mp, "Ending recovery (logdev: %s)", |
4539 | log->l_mp->m_logname ? log->l_mp->m_logname | |
4540 | : "internal"); | |
1da177e4 LT |
4541 | log->l_flags &= ~XLOG_RECOVERY_NEEDED; |
4542 | } else { | |
a0fa2b67 | 4543 | xfs_info(log->l_mp, "Ending clean mount"); |
1da177e4 LT |
4544 | } |
4545 | return 0; | |
4546 | } | |
4547 | ||
4548 | ||
4549 | #if defined(DEBUG) | |
4550 | /* | |
4551 | * Read all of the agf and agi counters and check that they | |
4552 | * are consistent with the superblock counters. | |
4553 | */ | |
4554 | void | |
4555 | xlog_recover_check_summary( | |
9a8d2fdb | 4556 | struct xlog *log) |
1da177e4 LT |
4557 | { |
4558 | xfs_mount_t *mp; | |
4559 | xfs_agf_t *agfp; | |
1da177e4 LT |
4560 | xfs_buf_t *agfbp; |
4561 | xfs_buf_t *agibp; | |
1da177e4 LT |
4562 | xfs_agnumber_t agno; |
4563 | __uint64_t freeblks; | |
4564 | __uint64_t itotal; | |
4565 | __uint64_t ifree; | |
5e1be0fb | 4566 | int error; |
1da177e4 LT |
4567 | |
4568 | mp = log->l_mp; | |
4569 | ||
4570 | freeblks = 0LL; | |
4571 | itotal = 0LL; | |
4572 | ifree = 0LL; | |
4573 | for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) { | |
4805621a FCH |
4574 | error = xfs_read_agf(mp, NULL, agno, 0, &agfbp); |
4575 | if (error) { | |
a0fa2b67 DC |
4576 | xfs_alert(mp, "%s agf read failed agno %d error %d", |
4577 | __func__, agno, error); | |
4805621a FCH |
4578 | } else { |
4579 | agfp = XFS_BUF_TO_AGF(agfbp); | |
4580 | freeblks += be32_to_cpu(agfp->agf_freeblks) + | |
4581 | be32_to_cpu(agfp->agf_flcount); | |
4582 | xfs_buf_relse(agfbp); | |
1da177e4 | 4583 | } |
1da177e4 | 4584 | |
5e1be0fb | 4585 | error = xfs_read_agi(mp, NULL, agno, &agibp); |
a0fa2b67 DC |
4586 | if (error) { |
4587 | xfs_alert(mp, "%s agi read failed agno %d error %d", | |
4588 | __func__, agno, error); | |
4589 | } else { | |
5e1be0fb | 4590 | struct xfs_agi *agi = XFS_BUF_TO_AGI(agibp); |
16259e7d | 4591 | |
5e1be0fb CH |
4592 | itotal += be32_to_cpu(agi->agi_count); |
4593 | ifree += be32_to_cpu(agi->agi_freecount); | |
4594 | xfs_buf_relse(agibp); | |
4595 | } | |
1da177e4 | 4596 | } |
1da177e4 LT |
4597 | } |
4598 | #endif /* DEBUG */ |