Commit | Line | Data |
---|---|---|
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" |
1da177e4 | 20 | #include "xfs_types.h" |
a844f451 | 21 | #include "xfs_bit.h" |
1da177e4 | 22 | #include "xfs_log.h" |
a844f451 | 23 | #include "xfs_inum.h" |
1da177e4 | 24 | #include "xfs_trans.h" |
a844f451 NS |
25 | #include "xfs_sb.h" |
26 | #include "xfs_ag.h" | |
1da177e4 LT |
27 | #include "xfs_mount.h" |
28 | #include "xfs_error.h" | |
29 | #include "xfs_bmap_btree.h" | |
a844f451 NS |
30 | #include "xfs_alloc_btree.h" |
31 | #include "xfs_ialloc_btree.h" | |
1da177e4 | 32 | #include "xfs_dinode.h" |
1da177e4 | 33 | #include "xfs_inode.h" |
a844f451 | 34 | #include "xfs_inode_item.h" |
a844f451 | 35 | #include "xfs_alloc.h" |
1da177e4 LT |
36 | #include "xfs_ialloc.h" |
37 | #include "xfs_log_priv.h" | |
38 | #include "xfs_buf_item.h" | |
1da177e4 LT |
39 | #include "xfs_log_recover.h" |
40 | #include "xfs_extfree_item.h" | |
41 | #include "xfs_trans_priv.h" | |
1da177e4 LT |
42 | #include "xfs_quota.h" |
43 | #include "xfs_rw.h" | |
43355099 | 44 | #include "xfs_utils.h" |
0b1b213f | 45 | #include "xfs_trace.h" |
1da177e4 LT |
46 | |
47 | STATIC int xlog_find_zeroed(xlog_t *, xfs_daddr_t *); | |
48 | STATIC int xlog_clear_stale_blocks(xlog_t *, xfs_lsn_t); | |
1da177e4 LT |
49 | #if defined(DEBUG) |
50 | STATIC void xlog_recover_check_summary(xlog_t *); | |
1da177e4 LT |
51 | #else |
52 | #define xlog_recover_check_summary(log) | |
1da177e4 LT |
53 | #endif |
54 | ||
d5689eaa CH |
55 | /* |
56 | * This structure is used during recovery to record the buf log items which | |
57 | * have been canceled and should not be replayed. | |
58 | */ | |
59 | struct xfs_buf_cancel { | |
60 | xfs_daddr_t bc_blkno; | |
61 | uint bc_len; | |
62 | int bc_refcount; | |
63 | struct list_head bc_list; | |
64 | }; | |
65 | ||
1da177e4 LT |
66 | /* |
67 | * Sector aligned buffer routines for buffer create/read/write/access | |
68 | */ | |
69 | ||
ff30a622 AE |
70 | /* |
71 | * Verify the given count of basic blocks is valid number of blocks | |
72 | * to specify for an operation involving the given XFS log buffer. | |
73 | * Returns nonzero if the count is valid, 0 otherwise. | |
74 | */ | |
75 | ||
76 | static inline int | |
77 | xlog_buf_bbcount_valid( | |
78 | xlog_t *log, | |
79 | int bbcount) | |
80 | { | |
81 | return bbcount > 0 && bbcount <= log->l_logBBsize; | |
82 | } | |
83 | ||
36adecff AE |
84 | /* |
85 | * Allocate a buffer to hold log data. The buffer needs to be able | |
86 | * to map to a range of nbblks basic blocks at any valid (basic | |
87 | * block) offset within the log. | |
88 | */ | |
5d77c0dc | 89 | STATIC xfs_buf_t * |
1da177e4 LT |
90 | xlog_get_bp( |
91 | xlog_t *log, | |
3228149c | 92 | int nbblks) |
1da177e4 | 93 | { |
ff30a622 AE |
94 | if (!xlog_buf_bbcount_valid(log, nbblks)) { |
95 | xlog_warn("XFS: Invalid block length (0x%x) given for buffer", | |
96 | nbblks); | |
97 | XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp); | |
3228149c DC |
98 | return NULL; |
99 | } | |
1da177e4 | 100 | |
36adecff AE |
101 | /* |
102 | * We do log I/O in units of log sectors (a power-of-2 | |
103 | * multiple of the basic block size), so we round up the | |
104 | * requested size to acommodate the basic blocks required | |
105 | * for complete log sectors. | |
106 | * | |
107 | * In addition, the buffer may be used for a non-sector- | |
108 | * aligned block offset, in which case an I/O of the | |
109 | * requested size could extend beyond the end of the | |
110 | * buffer. If the requested size is only 1 basic block it | |
111 | * will never straddle a sector boundary, so this won't be | |
112 | * an issue. Nor will this be a problem if the log I/O is | |
113 | * done in basic blocks (sector size 1). But otherwise we | |
114 | * extend the buffer by one extra log sector to ensure | |
115 | * there's space to accomodate this possiblility. | |
116 | */ | |
69ce58f0 AE |
117 | if (nbblks > 1 && log->l_sectBBsize > 1) |
118 | nbblks += log->l_sectBBsize; | |
119 | nbblks = round_up(nbblks, log->l_sectBBsize); | |
36adecff | 120 | |
686865f7 DC |
121 | return xfs_buf_get_uncached(log->l_mp->m_logdev_targp, |
122 | BBTOB(nbblks), 0); | |
1da177e4 LT |
123 | } |
124 | ||
5d77c0dc | 125 | STATIC void |
1da177e4 LT |
126 | xlog_put_bp( |
127 | xfs_buf_t *bp) | |
128 | { | |
129 | xfs_buf_free(bp); | |
130 | } | |
131 | ||
48389ef1 AE |
132 | /* |
133 | * Return the address of the start of the given block number's data | |
134 | * in a log buffer. The buffer covers a log sector-aligned region. | |
135 | */ | |
076e6acb CH |
136 | STATIC xfs_caddr_t |
137 | xlog_align( | |
138 | xlog_t *log, | |
139 | xfs_daddr_t blk_no, | |
140 | int nbblks, | |
141 | xfs_buf_t *bp) | |
142 | { | |
fdc07f44 | 143 | xfs_daddr_t offset = blk_no & ((xfs_daddr_t)log->l_sectBBsize - 1); |
076e6acb | 144 | |
fdc07f44 CH |
145 | ASSERT(BBTOB(offset + nbblks) <= XFS_BUF_SIZE(bp)); |
146 | return XFS_BUF_PTR(bp) + BBTOB(offset); | |
076e6acb CH |
147 | } |
148 | ||
1da177e4 LT |
149 | |
150 | /* | |
151 | * nbblks should be uint, but oh well. Just want to catch that 32-bit length. | |
152 | */ | |
076e6acb CH |
153 | STATIC int |
154 | xlog_bread_noalign( | |
1da177e4 LT |
155 | xlog_t *log, |
156 | xfs_daddr_t blk_no, | |
157 | int nbblks, | |
158 | xfs_buf_t *bp) | |
159 | { | |
160 | int error; | |
161 | ||
ff30a622 AE |
162 | if (!xlog_buf_bbcount_valid(log, nbblks)) { |
163 | xlog_warn("XFS: Invalid block length (0x%x) given for buffer", | |
164 | nbblks); | |
165 | XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp); | |
3228149c DC |
166 | return EFSCORRUPTED; |
167 | } | |
168 | ||
69ce58f0 AE |
169 | blk_no = round_down(blk_no, log->l_sectBBsize); |
170 | nbblks = round_up(nbblks, log->l_sectBBsize); | |
1da177e4 LT |
171 | |
172 | ASSERT(nbblks > 0); | |
173 | ASSERT(BBTOB(nbblks) <= XFS_BUF_SIZE(bp)); | |
1da177e4 LT |
174 | |
175 | XFS_BUF_SET_ADDR(bp, log->l_logBBstart + blk_no); | |
176 | XFS_BUF_READ(bp); | |
177 | XFS_BUF_BUSY(bp); | |
178 | XFS_BUF_SET_COUNT(bp, BBTOB(nbblks)); | |
179 | XFS_BUF_SET_TARGET(bp, log->l_mp->m_logdev_targp); | |
180 | ||
181 | xfsbdstrat(log->l_mp, bp); | |
1a1a3e97 | 182 | error = xfs_buf_iowait(bp); |
d64e31a2 | 183 | if (error) |
1da177e4 LT |
184 | xfs_ioerror_alert("xlog_bread", log->l_mp, |
185 | bp, XFS_BUF_ADDR(bp)); | |
186 | return error; | |
187 | } | |
188 | ||
076e6acb CH |
189 | STATIC int |
190 | xlog_bread( | |
191 | xlog_t *log, | |
192 | xfs_daddr_t blk_no, | |
193 | int nbblks, | |
194 | xfs_buf_t *bp, | |
195 | xfs_caddr_t *offset) | |
196 | { | |
197 | int error; | |
198 | ||
199 | error = xlog_bread_noalign(log, blk_no, nbblks, bp); | |
200 | if (error) | |
201 | return error; | |
202 | ||
203 | *offset = xlog_align(log, blk_no, nbblks, bp); | |
204 | return 0; | |
205 | } | |
206 | ||
1da177e4 LT |
207 | /* |
208 | * Write out the buffer at the given block for the given number of blocks. | |
209 | * The buffer is kept locked across the write and is returned locked. | |
210 | * This can only be used for synchronous log writes. | |
211 | */ | |
ba0f32d4 | 212 | STATIC int |
1da177e4 LT |
213 | xlog_bwrite( |
214 | xlog_t *log, | |
215 | xfs_daddr_t blk_no, | |
216 | int nbblks, | |
217 | xfs_buf_t *bp) | |
218 | { | |
219 | int error; | |
220 | ||
ff30a622 AE |
221 | if (!xlog_buf_bbcount_valid(log, nbblks)) { |
222 | xlog_warn("XFS: Invalid block length (0x%x) given for buffer", | |
223 | nbblks); | |
224 | XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp); | |
3228149c DC |
225 | return EFSCORRUPTED; |
226 | } | |
227 | ||
69ce58f0 AE |
228 | blk_no = round_down(blk_no, log->l_sectBBsize); |
229 | nbblks = round_up(nbblks, log->l_sectBBsize); | |
1da177e4 LT |
230 | |
231 | ASSERT(nbblks > 0); | |
232 | ASSERT(BBTOB(nbblks) <= XFS_BUF_SIZE(bp)); | |
233 | ||
234 | XFS_BUF_SET_ADDR(bp, log->l_logBBstart + blk_no); | |
235 | XFS_BUF_ZEROFLAGS(bp); | |
236 | XFS_BUF_BUSY(bp); | |
237 | XFS_BUF_HOLD(bp); | |
238 | XFS_BUF_PSEMA(bp, PRIBIO); | |
239 | XFS_BUF_SET_COUNT(bp, BBTOB(nbblks)); | |
240 | XFS_BUF_SET_TARGET(bp, log->l_mp->m_logdev_targp); | |
241 | ||
242 | if ((error = xfs_bwrite(log->l_mp, bp))) | |
243 | xfs_ioerror_alert("xlog_bwrite", log->l_mp, | |
244 | bp, XFS_BUF_ADDR(bp)); | |
245 | return error; | |
246 | } | |
247 | ||
1da177e4 LT |
248 | #ifdef DEBUG |
249 | /* | |
250 | * dump debug superblock and log record information | |
251 | */ | |
252 | STATIC void | |
253 | xlog_header_check_dump( | |
254 | xfs_mount_t *mp, | |
255 | xlog_rec_header_t *head) | |
256 | { | |
03daa57c JP |
257 | cmn_err(CE_DEBUG, "%s: SB : uuid = %pU, fmt = %d\n", |
258 | __func__, &mp->m_sb.sb_uuid, XLOG_FMT); | |
259 | cmn_err(CE_DEBUG, " log : uuid = %pU, fmt = %d\n", | |
260 | &head->h_fs_uuid, be32_to_cpu(head->h_fmt)); | |
1da177e4 LT |
261 | } |
262 | #else | |
263 | #define xlog_header_check_dump(mp, head) | |
264 | #endif | |
265 | ||
266 | /* | |
267 | * check log record header for recovery | |
268 | */ | |
269 | STATIC int | |
270 | xlog_header_check_recover( | |
271 | xfs_mount_t *mp, | |
272 | xlog_rec_header_t *head) | |
273 | { | |
b53e675d | 274 | ASSERT(be32_to_cpu(head->h_magicno) == XLOG_HEADER_MAGIC_NUM); |
1da177e4 LT |
275 | |
276 | /* | |
277 | * IRIX doesn't write the h_fmt field and leaves it zeroed | |
278 | * (XLOG_FMT_UNKNOWN). This stops us from trying to recover | |
279 | * a dirty log created in IRIX. | |
280 | */ | |
b53e675d | 281 | if (unlikely(be32_to_cpu(head->h_fmt) != XLOG_FMT)) { |
1da177e4 LT |
282 | xlog_warn( |
283 | "XFS: dirty log written in incompatible format - can't recover"); | |
284 | xlog_header_check_dump(mp, head); | |
285 | XFS_ERROR_REPORT("xlog_header_check_recover(1)", | |
286 | XFS_ERRLEVEL_HIGH, mp); | |
287 | return XFS_ERROR(EFSCORRUPTED); | |
288 | } else if (unlikely(!uuid_equal(&mp->m_sb.sb_uuid, &head->h_fs_uuid))) { | |
289 | xlog_warn( | |
290 | "XFS: dirty log entry has mismatched uuid - can't recover"); | |
291 | xlog_header_check_dump(mp, head); | |
292 | XFS_ERROR_REPORT("xlog_header_check_recover(2)", | |
293 | XFS_ERRLEVEL_HIGH, mp); | |
294 | return XFS_ERROR(EFSCORRUPTED); | |
295 | } | |
296 | return 0; | |
297 | } | |
298 | ||
299 | /* | |
300 | * read the head block of the log and check the header | |
301 | */ | |
302 | STATIC int | |
303 | xlog_header_check_mount( | |
304 | xfs_mount_t *mp, | |
305 | xlog_rec_header_t *head) | |
306 | { | |
b53e675d | 307 | ASSERT(be32_to_cpu(head->h_magicno) == XLOG_HEADER_MAGIC_NUM); |
1da177e4 LT |
308 | |
309 | if (uuid_is_nil(&head->h_fs_uuid)) { | |
310 | /* | |
311 | * IRIX doesn't write the h_fs_uuid or h_fmt fields. If | |
312 | * h_fs_uuid is nil, we assume this log was last mounted | |
313 | * by IRIX and continue. | |
314 | */ | |
315 | xlog_warn("XFS: nil uuid in log - IRIX style log"); | |
316 | } else if (unlikely(!uuid_equal(&mp->m_sb.sb_uuid, &head->h_fs_uuid))) { | |
317 | xlog_warn("XFS: log has mismatched uuid - can't recover"); | |
318 | xlog_header_check_dump(mp, head); | |
319 | XFS_ERROR_REPORT("xlog_header_check_mount", | |
320 | XFS_ERRLEVEL_HIGH, mp); | |
321 | return XFS_ERROR(EFSCORRUPTED); | |
322 | } | |
323 | return 0; | |
324 | } | |
325 | ||
326 | STATIC void | |
327 | xlog_recover_iodone( | |
328 | struct xfs_buf *bp) | |
329 | { | |
1da177e4 LT |
330 | if (XFS_BUF_GETERROR(bp)) { |
331 | /* | |
332 | * We're not going to bother about retrying | |
333 | * this during recovery. One strike! | |
334 | */ | |
1da177e4 | 335 | xfs_ioerror_alert("xlog_recover_iodone", |
ebad861b DC |
336 | bp->b_target->bt_mount, bp, |
337 | XFS_BUF_ADDR(bp)); | |
338 | xfs_force_shutdown(bp->b_target->bt_mount, | |
339 | SHUTDOWN_META_IO_ERROR); | |
1da177e4 | 340 | } |
1da177e4 | 341 | XFS_BUF_CLR_IODONE_FUNC(bp); |
1a1a3e97 | 342 | xfs_buf_ioend(bp, 0); |
1da177e4 LT |
343 | } |
344 | ||
345 | /* | |
346 | * This routine finds (to an approximation) the first block in the physical | |
347 | * log which contains the given cycle. It uses a binary search algorithm. | |
348 | * Note that the algorithm can not be perfect because the disk will not | |
349 | * necessarily be perfect. | |
350 | */ | |
a8272ce0 | 351 | STATIC int |
1da177e4 LT |
352 | xlog_find_cycle_start( |
353 | xlog_t *log, | |
354 | xfs_buf_t *bp, | |
355 | xfs_daddr_t first_blk, | |
356 | xfs_daddr_t *last_blk, | |
357 | uint cycle) | |
358 | { | |
359 | xfs_caddr_t offset; | |
360 | xfs_daddr_t mid_blk; | |
e3bb2e30 | 361 | xfs_daddr_t end_blk; |
1da177e4 LT |
362 | uint mid_cycle; |
363 | int error; | |
364 | ||
e3bb2e30 AE |
365 | end_blk = *last_blk; |
366 | mid_blk = BLK_AVG(first_blk, end_blk); | |
367 | while (mid_blk != first_blk && mid_blk != end_blk) { | |
076e6acb CH |
368 | error = xlog_bread(log, mid_blk, 1, bp, &offset); |
369 | if (error) | |
1da177e4 | 370 | return error; |
03bea6fe | 371 | mid_cycle = xlog_get_cycle(offset); |
e3bb2e30 AE |
372 | if (mid_cycle == cycle) |
373 | end_blk = mid_blk; /* last_half_cycle == mid_cycle */ | |
374 | else | |
375 | first_blk = mid_blk; /* first_half_cycle == mid_cycle */ | |
376 | mid_blk = BLK_AVG(first_blk, end_blk); | |
1da177e4 | 377 | } |
e3bb2e30 AE |
378 | ASSERT((mid_blk == first_blk && mid_blk+1 == end_blk) || |
379 | (mid_blk == end_blk && mid_blk-1 == first_blk)); | |
380 | ||
381 | *last_blk = end_blk; | |
1da177e4 LT |
382 | |
383 | return 0; | |
384 | } | |
385 | ||
386 | /* | |
3f943d85 AE |
387 | * Check that a range of blocks does not contain stop_on_cycle_no. |
388 | * Fill in *new_blk with the block offset where such a block is | |
389 | * found, or with -1 (an invalid block number) if there is no such | |
390 | * block in the range. The scan needs to occur from front to back | |
391 | * and the pointer into the region must be updated since a later | |
392 | * routine will need to perform another test. | |
1da177e4 LT |
393 | */ |
394 | STATIC int | |
395 | xlog_find_verify_cycle( | |
396 | xlog_t *log, | |
397 | xfs_daddr_t start_blk, | |
398 | int nbblks, | |
399 | uint stop_on_cycle_no, | |
400 | xfs_daddr_t *new_blk) | |
401 | { | |
402 | xfs_daddr_t i, j; | |
403 | uint cycle; | |
404 | xfs_buf_t *bp; | |
405 | xfs_daddr_t bufblks; | |
406 | xfs_caddr_t buf = NULL; | |
407 | int error = 0; | |
408 | ||
6881a229 AE |
409 | /* |
410 | * Greedily allocate a buffer big enough to handle the full | |
411 | * range of basic blocks we'll be examining. If that fails, | |
412 | * try a smaller size. We need to be able to read at least | |
413 | * a log sector, or we're out of luck. | |
414 | */ | |
1da177e4 | 415 | bufblks = 1 << ffs(nbblks); |
1da177e4 | 416 | while (!(bp = xlog_get_bp(log, bufblks))) { |
1da177e4 | 417 | bufblks >>= 1; |
69ce58f0 | 418 | if (bufblks < log->l_sectBBsize) |
1da177e4 LT |
419 | return ENOMEM; |
420 | } | |
421 | ||
422 | for (i = start_blk; i < start_blk + nbblks; i += bufblks) { | |
423 | int bcount; | |
424 | ||
425 | bcount = min(bufblks, (start_blk + nbblks - i)); | |
426 | ||
076e6acb CH |
427 | error = xlog_bread(log, i, bcount, bp, &buf); |
428 | if (error) | |
1da177e4 LT |
429 | goto out; |
430 | ||
1da177e4 | 431 | for (j = 0; j < bcount; j++) { |
03bea6fe | 432 | cycle = xlog_get_cycle(buf); |
1da177e4 LT |
433 | if (cycle == stop_on_cycle_no) { |
434 | *new_blk = i+j; | |
435 | goto out; | |
436 | } | |
437 | ||
438 | buf += BBSIZE; | |
439 | } | |
440 | } | |
441 | ||
442 | *new_blk = -1; | |
443 | ||
444 | out: | |
445 | xlog_put_bp(bp); | |
446 | return error; | |
447 | } | |
448 | ||
449 | /* | |
450 | * Potentially backup over partial log record write. | |
451 | * | |
452 | * In the typical case, last_blk is the number of the block directly after | |
453 | * a good log record. Therefore, we subtract one to get the block number | |
454 | * of the last block in the given buffer. extra_bblks contains the number | |
455 | * of blocks we would have read on a previous read. This happens when the | |
456 | * last log record is split over the end of the physical log. | |
457 | * | |
458 | * extra_bblks is the number of blocks potentially verified on a previous | |
459 | * call to this routine. | |
460 | */ | |
461 | STATIC int | |
462 | xlog_find_verify_log_record( | |
463 | xlog_t *log, | |
464 | xfs_daddr_t start_blk, | |
465 | xfs_daddr_t *last_blk, | |
466 | int extra_bblks) | |
467 | { | |
468 | xfs_daddr_t i; | |
469 | xfs_buf_t *bp; | |
470 | xfs_caddr_t offset = NULL; | |
471 | xlog_rec_header_t *head = NULL; | |
472 | int error = 0; | |
473 | int smallmem = 0; | |
474 | int num_blks = *last_blk - start_blk; | |
475 | int xhdrs; | |
476 | ||
477 | ASSERT(start_blk != 0 || *last_blk != start_blk); | |
478 | ||
479 | if (!(bp = xlog_get_bp(log, num_blks))) { | |
480 | if (!(bp = xlog_get_bp(log, 1))) | |
481 | return ENOMEM; | |
482 | smallmem = 1; | |
483 | } else { | |
076e6acb CH |
484 | error = xlog_bread(log, start_blk, num_blks, bp, &offset); |
485 | if (error) | |
1da177e4 | 486 | goto out; |
1da177e4 LT |
487 | offset += ((num_blks - 1) << BBSHIFT); |
488 | } | |
489 | ||
490 | for (i = (*last_blk) - 1; i >= 0; i--) { | |
491 | if (i < start_blk) { | |
492 | /* valid log record not found */ | |
493 | xlog_warn( | |
494 | "XFS: Log inconsistent (didn't find previous header)"); | |
495 | ASSERT(0); | |
496 | error = XFS_ERROR(EIO); | |
497 | goto out; | |
498 | } | |
499 | ||
500 | if (smallmem) { | |
076e6acb CH |
501 | error = xlog_bread(log, i, 1, bp, &offset); |
502 | if (error) | |
1da177e4 | 503 | goto out; |
1da177e4 LT |
504 | } |
505 | ||
506 | head = (xlog_rec_header_t *)offset; | |
507 | ||
b53e675d | 508 | if (XLOG_HEADER_MAGIC_NUM == be32_to_cpu(head->h_magicno)) |
1da177e4 LT |
509 | break; |
510 | ||
511 | if (!smallmem) | |
512 | offset -= BBSIZE; | |
513 | } | |
514 | ||
515 | /* | |
516 | * We hit the beginning of the physical log & still no header. Return | |
517 | * to caller. If caller can handle a return of -1, then this routine | |
518 | * will be called again for the end of the physical log. | |
519 | */ | |
520 | if (i == -1) { | |
521 | error = -1; | |
522 | goto out; | |
523 | } | |
524 | ||
525 | /* | |
526 | * We have the final block of the good log (the first block | |
527 | * of the log record _before_ the head. So we check the uuid. | |
528 | */ | |
529 | if ((error = xlog_header_check_mount(log->l_mp, head))) | |
530 | goto out; | |
531 | ||
532 | /* | |
533 | * We may have found a log record header before we expected one. | |
534 | * last_blk will be the 1st block # with a given cycle #. We may end | |
535 | * up reading an entire log record. In this case, we don't want to | |
536 | * reset last_blk. Only when last_blk points in the middle of a log | |
537 | * record do we update last_blk. | |
538 | */ | |
62118709 | 539 | if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { |
b53e675d | 540 | uint h_size = be32_to_cpu(head->h_size); |
1da177e4 LT |
541 | |
542 | xhdrs = h_size / XLOG_HEADER_CYCLE_SIZE; | |
543 | if (h_size % XLOG_HEADER_CYCLE_SIZE) | |
544 | xhdrs++; | |
545 | } else { | |
546 | xhdrs = 1; | |
547 | } | |
548 | ||
b53e675d CH |
549 | if (*last_blk - i + extra_bblks != |
550 | BTOBB(be32_to_cpu(head->h_len)) + xhdrs) | |
1da177e4 LT |
551 | *last_blk = i; |
552 | ||
553 | out: | |
554 | xlog_put_bp(bp); | |
555 | return error; | |
556 | } | |
557 | ||
558 | /* | |
559 | * Head is defined to be the point of the log where the next log write | |
560 | * write could go. This means that incomplete LR writes at the end are | |
561 | * eliminated when calculating the head. We aren't guaranteed that previous | |
562 | * LR have complete transactions. We only know that a cycle number of | |
563 | * current cycle number -1 won't be present in the log if we start writing | |
564 | * from our current block number. | |
565 | * | |
566 | * last_blk contains the block number of the first block with a given | |
567 | * cycle number. | |
568 | * | |
569 | * Return: zero if normal, non-zero if error. | |
570 | */ | |
ba0f32d4 | 571 | STATIC int |
1da177e4 LT |
572 | xlog_find_head( |
573 | xlog_t *log, | |
574 | xfs_daddr_t *return_head_blk) | |
575 | { | |
576 | xfs_buf_t *bp; | |
577 | xfs_caddr_t offset; | |
578 | xfs_daddr_t new_blk, first_blk, start_blk, last_blk, head_blk; | |
579 | int num_scan_bblks; | |
580 | uint first_half_cycle, last_half_cycle; | |
581 | uint stop_on_cycle; | |
582 | int error, log_bbnum = log->l_logBBsize; | |
583 | ||
584 | /* Is the end of the log device zeroed? */ | |
585 | if ((error = xlog_find_zeroed(log, &first_blk)) == -1) { | |
586 | *return_head_blk = first_blk; | |
587 | ||
588 | /* Is the whole lot zeroed? */ | |
589 | if (!first_blk) { | |
590 | /* Linux XFS shouldn't generate totally zeroed logs - | |
591 | * mkfs etc write a dummy unmount record to a fresh | |
592 | * log so we can store the uuid in there | |
593 | */ | |
594 | xlog_warn("XFS: totally zeroed log"); | |
595 | } | |
596 | ||
597 | return 0; | |
598 | } else if (error) { | |
599 | xlog_warn("XFS: empty log check failed"); | |
600 | return error; | |
601 | } | |
602 | ||
603 | first_blk = 0; /* get cycle # of 1st block */ | |
604 | bp = xlog_get_bp(log, 1); | |
605 | if (!bp) | |
606 | return ENOMEM; | |
076e6acb CH |
607 | |
608 | error = xlog_bread(log, 0, 1, bp, &offset); | |
609 | if (error) | |
1da177e4 | 610 | goto bp_err; |
076e6acb | 611 | |
03bea6fe | 612 | first_half_cycle = xlog_get_cycle(offset); |
1da177e4 LT |
613 | |
614 | last_blk = head_blk = log_bbnum - 1; /* get cycle # of last block */ | |
076e6acb CH |
615 | error = xlog_bread(log, last_blk, 1, bp, &offset); |
616 | if (error) | |
1da177e4 | 617 | goto bp_err; |
076e6acb | 618 | |
03bea6fe | 619 | last_half_cycle = xlog_get_cycle(offset); |
1da177e4 LT |
620 | ASSERT(last_half_cycle != 0); |
621 | ||
622 | /* | |
623 | * If the 1st half cycle number is equal to the last half cycle number, | |
624 | * then the entire log is stamped with the same cycle number. In this | |
625 | * case, head_blk can't be set to zero (which makes sense). The below | |
626 | * math doesn't work out properly with head_blk equal to zero. Instead, | |
627 | * we set it to log_bbnum which is an invalid block number, but this | |
628 | * value makes the math correct. If head_blk doesn't changed through | |
629 | * all the tests below, *head_blk is set to zero at the very end rather | |
630 | * than log_bbnum. In a sense, log_bbnum and zero are the same block | |
631 | * in a circular file. | |
632 | */ | |
633 | if (first_half_cycle == last_half_cycle) { | |
634 | /* | |
635 | * In this case we believe that the entire log should have | |
636 | * cycle number last_half_cycle. We need to scan backwards | |
637 | * from the end verifying that there are no holes still | |
638 | * containing last_half_cycle - 1. If we find such a hole, | |
639 | * then the start of that hole will be the new head. The | |
640 | * simple case looks like | |
641 | * x | x ... | x - 1 | x | |
642 | * Another case that fits this picture would be | |
643 | * x | x + 1 | x ... | x | |
c41564b5 | 644 | * In this case the head really is somewhere at the end of the |
1da177e4 LT |
645 | * log, as one of the latest writes at the beginning was |
646 | * incomplete. | |
647 | * One more case is | |
648 | * x | x + 1 | x ... | x - 1 | x | |
649 | * This is really the combination of the above two cases, and | |
650 | * the head has to end up at the start of the x-1 hole at the | |
651 | * end of the log. | |
652 | * | |
653 | * In the 256k log case, we will read from the beginning to the | |
654 | * end of the log and search for cycle numbers equal to x-1. | |
655 | * We don't worry about the x+1 blocks that we encounter, | |
656 | * because we know that they cannot be the head since the log | |
657 | * started with x. | |
658 | */ | |
659 | head_blk = log_bbnum; | |
660 | stop_on_cycle = last_half_cycle - 1; | |
661 | } else { | |
662 | /* | |
663 | * In this case we want to find the first block with cycle | |
664 | * number matching last_half_cycle. We expect the log to be | |
665 | * some variation on | |
3f943d85 | 666 | * x + 1 ... | x ... | x |
1da177e4 LT |
667 | * The first block with cycle number x (last_half_cycle) will |
668 | * be where the new head belongs. First we do a binary search | |
669 | * for the first occurrence of last_half_cycle. The binary | |
670 | * search may not be totally accurate, so then we scan back | |
671 | * from there looking for occurrences of last_half_cycle before | |
672 | * us. If that backwards scan wraps around the beginning of | |
673 | * the log, then we look for occurrences of last_half_cycle - 1 | |
674 | * at the end of the log. The cases we're looking for look | |
675 | * like | |
3f943d85 AE |
676 | * v binary search stopped here |
677 | * x + 1 ... | x | x + 1 | x ... | x | |
678 | * ^ but we want to locate this spot | |
1da177e4 | 679 | * or |
1da177e4 | 680 | * <---------> less than scan distance |
3f943d85 AE |
681 | * x + 1 ... | x ... | x - 1 | x |
682 | * ^ we want to locate this spot | |
1da177e4 LT |
683 | */ |
684 | stop_on_cycle = last_half_cycle; | |
685 | if ((error = xlog_find_cycle_start(log, bp, first_blk, | |
686 | &head_blk, last_half_cycle))) | |
687 | goto bp_err; | |
688 | } | |
689 | ||
690 | /* | |
691 | * Now validate the answer. Scan back some number of maximum possible | |
692 | * blocks and make sure each one has the expected cycle number. The | |
693 | * maximum is determined by the total possible amount of buffering | |
694 | * in the in-core log. The following number can be made tighter if | |
695 | * we actually look at the block size of the filesystem. | |
696 | */ | |
697 | num_scan_bblks = XLOG_TOTAL_REC_SHIFT(log); | |
698 | if (head_blk >= num_scan_bblks) { | |
699 | /* | |
700 | * We are guaranteed that the entire check can be performed | |
701 | * in one buffer. | |
702 | */ | |
703 | start_blk = head_blk - num_scan_bblks; | |
704 | if ((error = xlog_find_verify_cycle(log, | |
705 | start_blk, num_scan_bblks, | |
706 | stop_on_cycle, &new_blk))) | |
707 | goto bp_err; | |
708 | if (new_blk != -1) | |
709 | head_blk = new_blk; | |
710 | } else { /* need to read 2 parts of log */ | |
711 | /* | |
712 | * We are going to scan backwards in the log in two parts. | |
713 | * First we scan the physical end of the log. In this part | |
714 | * of the log, we are looking for blocks with cycle number | |
715 | * last_half_cycle - 1. | |
716 | * If we find one, then we know that the log starts there, as | |
717 | * we've found a hole that didn't get written in going around | |
718 | * the end of the physical log. The simple case for this is | |
719 | * x + 1 ... | x ... | x - 1 | x | |
720 | * <---------> less than scan distance | |
721 | * If all of the blocks at the end of the log have cycle number | |
722 | * last_half_cycle, then we check the blocks at the start of | |
723 | * the log looking for occurrences of last_half_cycle. If we | |
724 | * find one, then our current estimate for the location of the | |
725 | * first occurrence of last_half_cycle is wrong and we move | |
726 | * back to the hole we've found. This case looks like | |
727 | * x + 1 ... | x | x + 1 | x ... | |
728 | * ^ binary search stopped here | |
729 | * Another case we need to handle that only occurs in 256k | |
730 | * logs is | |
731 | * x + 1 ... | x ... | x+1 | x ... | |
732 | * ^ binary search stops here | |
733 | * In a 256k log, the scan at the end of the log will see the | |
734 | * x + 1 blocks. We need to skip past those since that is | |
735 | * certainly not the head of the log. By searching for | |
736 | * last_half_cycle-1 we accomplish that. | |
737 | */ | |
1da177e4 | 738 | ASSERT(head_blk <= INT_MAX && |
3f943d85 AE |
739 | (xfs_daddr_t) num_scan_bblks >= head_blk); |
740 | start_blk = log_bbnum - (num_scan_bblks - head_blk); | |
1da177e4 LT |
741 | if ((error = xlog_find_verify_cycle(log, start_blk, |
742 | num_scan_bblks - (int)head_blk, | |
743 | (stop_on_cycle - 1), &new_blk))) | |
744 | goto bp_err; | |
745 | if (new_blk != -1) { | |
746 | head_blk = new_blk; | |
9db127ed | 747 | goto validate_head; |
1da177e4 LT |
748 | } |
749 | ||
750 | /* | |
751 | * Scan beginning of log now. The last part of the physical | |
752 | * log is good. This scan needs to verify that it doesn't find | |
753 | * the last_half_cycle. | |
754 | */ | |
755 | start_blk = 0; | |
756 | ASSERT(head_blk <= INT_MAX); | |
757 | if ((error = xlog_find_verify_cycle(log, | |
758 | start_blk, (int)head_blk, | |
759 | stop_on_cycle, &new_blk))) | |
760 | goto bp_err; | |
761 | if (new_blk != -1) | |
762 | head_blk = new_blk; | |
763 | } | |
764 | ||
9db127ed | 765 | validate_head: |
1da177e4 LT |
766 | /* |
767 | * Now we need to make sure head_blk is not pointing to a block in | |
768 | * the middle of a log record. | |
769 | */ | |
770 | num_scan_bblks = XLOG_REC_SHIFT(log); | |
771 | if (head_blk >= num_scan_bblks) { | |
772 | start_blk = head_blk - num_scan_bblks; /* don't read head_blk */ | |
773 | ||
774 | /* start ptr at last block ptr before head_blk */ | |
775 | if ((error = xlog_find_verify_log_record(log, start_blk, | |
776 | &head_blk, 0)) == -1) { | |
777 | error = XFS_ERROR(EIO); | |
778 | goto bp_err; | |
779 | } else if (error) | |
780 | goto bp_err; | |
781 | } else { | |
782 | start_blk = 0; | |
783 | ASSERT(head_blk <= INT_MAX); | |
784 | if ((error = xlog_find_verify_log_record(log, start_blk, | |
785 | &head_blk, 0)) == -1) { | |
786 | /* We hit the beginning of the log during our search */ | |
3f943d85 | 787 | start_blk = log_bbnum - (num_scan_bblks - head_blk); |
1da177e4 LT |
788 | new_blk = log_bbnum; |
789 | ASSERT(start_blk <= INT_MAX && | |
790 | (xfs_daddr_t) log_bbnum-start_blk >= 0); | |
791 | ASSERT(head_blk <= INT_MAX); | |
792 | if ((error = xlog_find_verify_log_record(log, | |
793 | start_blk, &new_blk, | |
794 | (int)head_blk)) == -1) { | |
795 | error = XFS_ERROR(EIO); | |
796 | goto bp_err; | |
797 | } else if (error) | |
798 | goto bp_err; | |
799 | if (new_blk != log_bbnum) | |
800 | head_blk = new_blk; | |
801 | } else if (error) | |
802 | goto bp_err; | |
803 | } | |
804 | ||
805 | xlog_put_bp(bp); | |
806 | if (head_blk == log_bbnum) | |
807 | *return_head_blk = 0; | |
808 | else | |
809 | *return_head_blk = head_blk; | |
810 | /* | |
811 | * When returning here, we have a good block number. Bad block | |
812 | * means that during a previous crash, we didn't have a clean break | |
813 | * from cycle number N to cycle number N-1. In this case, we need | |
814 | * to find the first block with cycle number N-1. | |
815 | */ | |
816 | return 0; | |
817 | ||
818 | bp_err: | |
819 | xlog_put_bp(bp); | |
820 | ||
821 | if (error) | |
822 | xlog_warn("XFS: failed to find log head"); | |
823 | return error; | |
824 | } | |
825 | ||
826 | /* | |
827 | * Find the sync block number or the tail of the log. | |
828 | * | |
829 | * This will be the block number of the last record to have its | |
830 | * associated buffers synced to disk. Every log record header has | |
831 | * a sync lsn embedded in it. LSNs hold block numbers, so it is easy | |
832 | * to get a sync block number. The only concern is to figure out which | |
833 | * log record header to believe. | |
834 | * | |
835 | * The following algorithm uses the log record header with the largest | |
836 | * lsn. The entire log record does not need to be valid. We only care | |
837 | * that the header is valid. | |
838 | * | |
839 | * We could speed up search by using current head_blk buffer, but it is not | |
840 | * available. | |
841 | */ | |
5d77c0dc | 842 | STATIC int |
1da177e4 LT |
843 | xlog_find_tail( |
844 | xlog_t *log, | |
845 | xfs_daddr_t *head_blk, | |
65be6054 | 846 | xfs_daddr_t *tail_blk) |
1da177e4 LT |
847 | { |
848 | xlog_rec_header_t *rhead; | |
849 | xlog_op_header_t *op_head; | |
850 | xfs_caddr_t offset = NULL; | |
851 | xfs_buf_t *bp; | |
852 | int error, i, found; | |
853 | xfs_daddr_t umount_data_blk; | |
854 | xfs_daddr_t after_umount_blk; | |
855 | xfs_lsn_t tail_lsn; | |
856 | int hblks; | |
857 | ||
858 | found = 0; | |
859 | ||
860 | /* | |
861 | * Find previous log record | |
862 | */ | |
863 | if ((error = xlog_find_head(log, head_blk))) | |
864 | return error; | |
865 | ||
866 | bp = xlog_get_bp(log, 1); | |
867 | if (!bp) | |
868 | return ENOMEM; | |
869 | if (*head_blk == 0) { /* special case */ | |
076e6acb CH |
870 | error = xlog_bread(log, 0, 1, bp, &offset); |
871 | if (error) | |
9db127ed | 872 | goto done; |
076e6acb | 873 | |
03bea6fe | 874 | if (xlog_get_cycle(offset) == 0) { |
1da177e4 LT |
875 | *tail_blk = 0; |
876 | /* leave all other log inited values alone */ | |
9db127ed | 877 | goto done; |
1da177e4 LT |
878 | } |
879 | } | |
880 | ||
881 | /* | |
882 | * Search backwards looking for log record header block | |
883 | */ | |
884 | ASSERT(*head_blk < INT_MAX); | |
885 | for (i = (int)(*head_blk) - 1; i >= 0; i--) { | |
076e6acb CH |
886 | error = xlog_bread(log, i, 1, bp, &offset); |
887 | if (error) | |
9db127ed | 888 | goto done; |
076e6acb | 889 | |
b53e675d | 890 | if (XLOG_HEADER_MAGIC_NUM == be32_to_cpu(*(__be32 *)offset)) { |
1da177e4 LT |
891 | found = 1; |
892 | break; | |
893 | } | |
894 | } | |
895 | /* | |
896 | * If we haven't found the log record header block, start looking | |
897 | * again from the end of the physical log. XXXmiken: There should be | |
898 | * a check here to make sure we didn't search more than N blocks in | |
899 | * the previous code. | |
900 | */ | |
901 | if (!found) { | |
902 | for (i = log->l_logBBsize - 1; i >= (int)(*head_blk); i--) { | |
076e6acb CH |
903 | error = xlog_bread(log, i, 1, bp, &offset); |
904 | if (error) | |
9db127ed | 905 | goto done; |
076e6acb | 906 | |
1da177e4 | 907 | if (XLOG_HEADER_MAGIC_NUM == |
b53e675d | 908 | be32_to_cpu(*(__be32 *)offset)) { |
1da177e4 LT |
909 | found = 2; |
910 | break; | |
911 | } | |
912 | } | |
913 | } | |
914 | if (!found) { | |
915 | xlog_warn("XFS: xlog_find_tail: couldn't find sync record"); | |
916 | ASSERT(0); | |
917 | return XFS_ERROR(EIO); | |
918 | } | |
919 | ||
920 | /* find blk_no of tail of log */ | |
921 | rhead = (xlog_rec_header_t *)offset; | |
b53e675d | 922 | *tail_blk = BLOCK_LSN(be64_to_cpu(rhead->h_tail_lsn)); |
1da177e4 LT |
923 | |
924 | /* | |
925 | * Reset log values according to the state of the log when we | |
926 | * crashed. In the case where head_blk == 0, we bump curr_cycle | |
927 | * one because the next write starts a new cycle rather than | |
928 | * continuing the cycle of the last good log record. At this | |
929 | * point we have guaranteed that all partial log records have been | |
930 | * accounted for. Therefore, we know that the last good log record | |
931 | * written was complete and ended exactly on the end boundary | |
932 | * of the physical log. | |
933 | */ | |
934 | log->l_prev_block = i; | |
935 | log->l_curr_block = (int)*head_blk; | |
b53e675d | 936 | log->l_curr_cycle = be32_to_cpu(rhead->h_cycle); |
1da177e4 LT |
937 | if (found == 2) |
938 | log->l_curr_cycle++; | |
1c3cb9ec | 939 | atomic64_set(&log->l_tail_lsn, be64_to_cpu(rhead->h_tail_lsn)); |
84f3c683 | 940 | atomic64_set(&log->l_last_sync_lsn, be64_to_cpu(rhead->h_lsn)); |
a69ed03c DC |
941 | xlog_assign_grant_head(&log->l_grant_reserve_head, log->l_curr_cycle, |
942 | BBTOB(log->l_curr_block)); | |
943 | xlog_assign_grant_head(&log->l_grant_write_head, log->l_curr_cycle, | |
944 | BBTOB(log->l_curr_block)); | |
1da177e4 LT |
945 | |
946 | /* | |
947 | * Look for unmount record. If we find it, then we know there | |
948 | * was a clean unmount. Since 'i' could be the last block in | |
949 | * the physical log, we convert to a log block before comparing | |
950 | * to the head_blk. | |
951 | * | |
952 | * Save the current tail lsn to use to pass to | |
953 | * xlog_clear_stale_blocks() below. We won't want to clear the | |
954 | * unmount record if there is one, so we pass the lsn of the | |
955 | * unmount record rather than the block after it. | |
956 | */ | |
62118709 | 957 | if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { |
b53e675d CH |
958 | int h_size = be32_to_cpu(rhead->h_size); |
959 | int h_version = be32_to_cpu(rhead->h_version); | |
1da177e4 LT |
960 | |
961 | if ((h_version & XLOG_VERSION_2) && | |
962 | (h_size > XLOG_HEADER_CYCLE_SIZE)) { | |
963 | hblks = h_size / XLOG_HEADER_CYCLE_SIZE; | |
964 | if (h_size % XLOG_HEADER_CYCLE_SIZE) | |
965 | hblks++; | |
966 | } else { | |
967 | hblks = 1; | |
968 | } | |
969 | } else { | |
970 | hblks = 1; | |
971 | } | |
972 | after_umount_blk = (i + hblks + (int) | |
b53e675d | 973 | BTOBB(be32_to_cpu(rhead->h_len))) % log->l_logBBsize; |
1c3cb9ec | 974 | tail_lsn = atomic64_read(&log->l_tail_lsn); |
1da177e4 | 975 | if (*head_blk == after_umount_blk && |
b53e675d | 976 | be32_to_cpu(rhead->h_num_logops) == 1) { |
1da177e4 | 977 | umount_data_blk = (i + hblks) % log->l_logBBsize; |
076e6acb CH |
978 | error = xlog_bread(log, umount_data_blk, 1, bp, &offset); |
979 | if (error) | |
9db127ed | 980 | goto done; |
076e6acb | 981 | |
1da177e4 LT |
982 | op_head = (xlog_op_header_t *)offset; |
983 | if (op_head->oh_flags & XLOG_UNMOUNT_TRANS) { | |
984 | /* | |
985 | * Set tail and last sync so that newly written | |
986 | * log records will point recovery to after the | |
987 | * current unmount record. | |
988 | */ | |
1c3cb9ec DC |
989 | xlog_assign_atomic_lsn(&log->l_tail_lsn, |
990 | log->l_curr_cycle, after_umount_blk); | |
991 | xlog_assign_atomic_lsn(&log->l_last_sync_lsn, | |
992 | log->l_curr_cycle, after_umount_blk); | |
1da177e4 | 993 | *tail_blk = after_umount_blk; |
92821e2b DC |
994 | |
995 | /* | |
996 | * Note that the unmount was clean. If the unmount | |
997 | * was not clean, we need to know this to rebuild the | |
998 | * superblock counters from the perag headers if we | |
999 | * have a filesystem using non-persistent counters. | |
1000 | */ | |
1001 | log->l_mp->m_flags |= XFS_MOUNT_WAS_CLEAN; | |
1da177e4 LT |
1002 | } |
1003 | } | |
1004 | ||
1005 | /* | |
1006 | * Make sure that there are no blocks in front of the head | |
1007 | * with the same cycle number as the head. This can happen | |
1008 | * because we allow multiple outstanding log writes concurrently, | |
1009 | * and the later writes might make it out before earlier ones. | |
1010 | * | |
1011 | * We use the lsn from before modifying it so that we'll never | |
1012 | * overwrite the unmount record after a clean unmount. | |
1013 | * | |
1014 | * Do this only if we are going to recover the filesystem | |
1015 | * | |
1016 | * NOTE: This used to say "if (!readonly)" | |
1017 | * However on Linux, we can & do recover a read-only filesystem. | |
1018 | * We only skip recovery if NORECOVERY is specified on mount, | |
1019 | * in which case we would not be here. | |
1020 | * | |
1021 | * But... if the -device- itself is readonly, just skip this. | |
1022 | * We can't recover this device anyway, so it won't matter. | |
1023 | */ | |
9db127ed | 1024 | if (!xfs_readonly_buftarg(log->l_mp->m_logdev_targp)) |
1da177e4 | 1025 | error = xlog_clear_stale_blocks(log, tail_lsn); |
1da177e4 | 1026 | |
9db127ed | 1027 | done: |
1da177e4 LT |
1028 | xlog_put_bp(bp); |
1029 | ||
1030 | if (error) | |
1031 | xlog_warn("XFS: failed to locate log tail"); | |
1032 | return error; | |
1033 | } | |
1034 | ||
1035 | /* | |
1036 | * Is the log zeroed at all? | |
1037 | * | |
1038 | * The last binary search should be changed to perform an X block read | |
1039 | * once X becomes small enough. You can then search linearly through | |
1040 | * the X blocks. This will cut down on the number of reads we need to do. | |
1041 | * | |
1042 | * If the log is partially zeroed, this routine will pass back the blkno | |
1043 | * of the first block with cycle number 0. It won't have a complete LR | |
1044 | * preceding it. | |
1045 | * | |
1046 | * Return: | |
1047 | * 0 => the log is completely written to | |
1048 | * -1 => use *blk_no as the first block of the log | |
1049 | * >0 => error has occurred | |
1050 | */ | |
a8272ce0 | 1051 | STATIC int |
1da177e4 LT |
1052 | xlog_find_zeroed( |
1053 | xlog_t *log, | |
1054 | xfs_daddr_t *blk_no) | |
1055 | { | |
1056 | xfs_buf_t *bp; | |
1057 | xfs_caddr_t offset; | |
1058 | uint first_cycle, last_cycle; | |
1059 | xfs_daddr_t new_blk, last_blk, start_blk; | |
1060 | xfs_daddr_t num_scan_bblks; | |
1061 | int error, log_bbnum = log->l_logBBsize; | |
1062 | ||
6fdf8ccc NS |
1063 | *blk_no = 0; |
1064 | ||
1da177e4 LT |
1065 | /* check totally zeroed log */ |
1066 | bp = xlog_get_bp(log, 1); | |
1067 | if (!bp) | |
1068 | return ENOMEM; | |
076e6acb CH |
1069 | error = xlog_bread(log, 0, 1, bp, &offset); |
1070 | if (error) | |
1da177e4 | 1071 | goto bp_err; |
076e6acb | 1072 | |
03bea6fe | 1073 | first_cycle = xlog_get_cycle(offset); |
1da177e4 LT |
1074 | if (first_cycle == 0) { /* completely zeroed log */ |
1075 | *blk_no = 0; | |
1076 | xlog_put_bp(bp); | |
1077 | return -1; | |
1078 | } | |
1079 | ||
1080 | /* check partially zeroed log */ | |
076e6acb CH |
1081 | error = xlog_bread(log, log_bbnum-1, 1, bp, &offset); |
1082 | if (error) | |
1da177e4 | 1083 | goto bp_err; |
076e6acb | 1084 | |
03bea6fe | 1085 | last_cycle = xlog_get_cycle(offset); |
1da177e4 LT |
1086 | if (last_cycle != 0) { /* log completely written to */ |
1087 | xlog_put_bp(bp); | |
1088 | return 0; | |
1089 | } else if (first_cycle != 1) { | |
1090 | /* | |
1091 | * If the cycle of the last block is zero, the cycle of | |
1092 | * the first block must be 1. If it's not, maybe we're | |
1093 | * not looking at a log... Bail out. | |
1094 | */ | |
1095 | xlog_warn("XFS: Log inconsistent or not a log (last==0, first!=1)"); | |
1096 | return XFS_ERROR(EINVAL); | |
1097 | } | |
1098 | ||
1099 | /* we have a partially zeroed log */ | |
1100 | last_blk = log_bbnum-1; | |
1101 | if ((error = xlog_find_cycle_start(log, bp, 0, &last_blk, 0))) | |
1102 | goto bp_err; | |
1103 | ||
1104 | /* | |
1105 | * Validate the answer. Because there is no way to guarantee that | |
1106 | * the entire log is made up of log records which are the same size, | |
1107 | * we scan over the defined maximum blocks. At this point, the maximum | |
1108 | * is not chosen to mean anything special. XXXmiken | |
1109 | */ | |
1110 | num_scan_bblks = XLOG_TOTAL_REC_SHIFT(log); | |
1111 | ASSERT(num_scan_bblks <= INT_MAX); | |
1112 | ||
1113 | if (last_blk < num_scan_bblks) | |
1114 | num_scan_bblks = last_blk; | |
1115 | start_blk = last_blk - num_scan_bblks; | |
1116 | ||
1117 | /* | |
1118 | * We search for any instances of cycle number 0 that occur before | |
1119 | * our current estimate of the head. What we're trying to detect is | |
1120 | * 1 ... | 0 | 1 | 0... | |
1121 | * ^ binary search ends here | |
1122 | */ | |
1123 | if ((error = xlog_find_verify_cycle(log, start_blk, | |
1124 | (int)num_scan_bblks, 0, &new_blk))) | |
1125 | goto bp_err; | |
1126 | if (new_blk != -1) | |
1127 | last_blk = new_blk; | |
1128 | ||
1129 | /* | |
1130 | * Potentially backup over partial log record write. We don't need | |
1131 | * to search the end of the log because we know it is zero. | |
1132 | */ | |
1133 | if ((error = xlog_find_verify_log_record(log, start_blk, | |
1134 | &last_blk, 0)) == -1) { | |
1135 | error = XFS_ERROR(EIO); | |
1136 | goto bp_err; | |
1137 | } else if (error) | |
1138 | goto bp_err; | |
1139 | ||
1140 | *blk_no = last_blk; | |
1141 | bp_err: | |
1142 | xlog_put_bp(bp); | |
1143 | if (error) | |
1144 | return error; | |
1145 | return -1; | |
1146 | } | |
1147 | ||
1148 | /* | |
1149 | * These are simple subroutines used by xlog_clear_stale_blocks() below | |
1150 | * to initialize a buffer full of empty log record headers and write | |
1151 | * them into the log. | |
1152 | */ | |
1153 | STATIC void | |
1154 | xlog_add_record( | |
1155 | xlog_t *log, | |
1156 | xfs_caddr_t buf, | |
1157 | int cycle, | |
1158 | int block, | |
1159 | int tail_cycle, | |
1160 | int tail_block) | |
1161 | { | |
1162 | xlog_rec_header_t *recp = (xlog_rec_header_t *)buf; | |
1163 | ||
1164 | memset(buf, 0, BBSIZE); | |
b53e675d CH |
1165 | recp->h_magicno = cpu_to_be32(XLOG_HEADER_MAGIC_NUM); |
1166 | recp->h_cycle = cpu_to_be32(cycle); | |
1167 | recp->h_version = cpu_to_be32( | |
62118709 | 1168 | xfs_sb_version_haslogv2(&log->l_mp->m_sb) ? 2 : 1); |
b53e675d CH |
1169 | recp->h_lsn = cpu_to_be64(xlog_assign_lsn(cycle, block)); |
1170 | recp->h_tail_lsn = cpu_to_be64(xlog_assign_lsn(tail_cycle, tail_block)); | |
1171 | recp->h_fmt = cpu_to_be32(XLOG_FMT); | |
1da177e4 LT |
1172 | memcpy(&recp->h_fs_uuid, &log->l_mp->m_sb.sb_uuid, sizeof(uuid_t)); |
1173 | } | |
1174 | ||
1175 | STATIC int | |
1176 | xlog_write_log_records( | |
1177 | xlog_t *log, | |
1178 | int cycle, | |
1179 | int start_block, | |
1180 | int blocks, | |
1181 | int tail_cycle, | |
1182 | int tail_block) | |
1183 | { | |
1184 | xfs_caddr_t offset; | |
1185 | xfs_buf_t *bp; | |
1186 | int balign, ealign; | |
69ce58f0 | 1187 | int sectbb = log->l_sectBBsize; |
1da177e4 LT |
1188 | int end_block = start_block + blocks; |
1189 | int bufblks; | |
1190 | int error = 0; | |
1191 | int i, j = 0; | |
1192 | ||
6881a229 AE |
1193 | /* |
1194 | * Greedily allocate a buffer big enough to handle the full | |
1195 | * range of basic blocks to be written. If that fails, try | |
1196 | * a smaller size. We need to be able to write at least a | |
1197 | * log sector, or we're out of luck. | |
1198 | */ | |
1da177e4 LT |
1199 | bufblks = 1 << ffs(blocks); |
1200 | while (!(bp = xlog_get_bp(log, bufblks))) { | |
1201 | bufblks >>= 1; | |
69ce58f0 | 1202 | if (bufblks < sectbb) |
1da177e4 LT |
1203 | return ENOMEM; |
1204 | } | |
1205 | ||
1206 | /* We may need to do a read at the start to fill in part of | |
1207 | * the buffer in the starting sector not covered by the first | |
1208 | * write below. | |
1209 | */ | |
5c17f533 | 1210 | balign = round_down(start_block, sectbb); |
1da177e4 | 1211 | if (balign != start_block) { |
076e6acb CH |
1212 | error = xlog_bread_noalign(log, start_block, 1, bp); |
1213 | if (error) | |
1214 | goto out_put_bp; | |
1215 | ||
1da177e4 LT |
1216 | j = start_block - balign; |
1217 | } | |
1218 | ||
1219 | for (i = start_block; i < end_block; i += bufblks) { | |
1220 | int bcount, endcount; | |
1221 | ||
1222 | bcount = min(bufblks, end_block - start_block); | |
1223 | endcount = bcount - j; | |
1224 | ||
1225 | /* We may need to do a read at the end to fill in part of | |
1226 | * the buffer in the final sector not covered by the write. | |
1227 | * If this is the same sector as the above read, skip it. | |
1228 | */ | |
5c17f533 | 1229 | ealign = round_down(end_block, sectbb); |
1da177e4 LT |
1230 | if (j == 0 && (start_block + endcount > ealign)) { |
1231 | offset = XFS_BUF_PTR(bp); | |
1232 | balign = BBTOB(ealign - start_block); | |
234f56ac DC |
1233 | error = XFS_BUF_SET_PTR(bp, offset + balign, |
1234 | BBTOB(sectbb)); | |
076e6acb CH |
1235 | if (error) |
1236 | break; | |
1237 | ||
1238 | error = xlog_bread_noalign(log, ealign, sectbb, bp); | |
1239 | if (error) | |
1240 | break; | |
1241 | ||
1242 | error = XFS_BUF_SET_PTR(bp, offset, bufblks); | |
234f56ac | 1243 | if (error) |
1da177e4 | 1244 | break; |
1da177e4 LT |
1245 | } |
1246 | ||
1247 | offset = xlog_align(log, start_block, endcount, bp); | |
1248 | for (; j < endcount; j++) { | |
1249 | xlog_add_record(log, offset, cycle, i+j, | |
1250 | tail_cycle, tail_block); | |
1251 | offset += BBSIZE; | |
1252 | } | |
1253 | error = xlog_bwrite(log, start_block, endcount, bp); | |
1254 | if (error) | |
1255 | break; | |
1256 | start_block += endcount; | |
1257 | j = 0; | |
1258 | } | |
076e6acb CH |
1259 | |
1260 | out_put_bp: | |
1da177e4 LT |
1261 | xlog_put_bp(bp); |
1262 | return error; | |
1263 | } | |
1264 | ||
1265 | /* | |
1266 | * This routine is called to blow away any incomplete log writes out | |
1267 | * in front of the log head. We do this so that we won't become confused | |
1268 | * if we come up, write only a little bit more, and then crash again. | |
1269 | * If we leave the partial log records out there, this situation could | |
1270 | * cause us to think those partial writes are valid blocks since they | |
1271 | * have the current cycle number. We get rid of them by overwriting them | |
1272 | * with empty log records with the old cycle number rather than the | |
1273 | * current one. | |
1274 | * | |
1275 | * The tail lsn is passed in rather than taken from | |
1276 | * the log so that we will not write over the unmount record after a | |
1277 | * clean unmount in a 512 block log. Doing so would leave the log without | |
1278 | * any valid log records in it until a new one was written. If we crashed | |
1279 | * during that time we would not be able to recover. | |
1280 | */ | |
1281 | STATIC int | |
1282 | xlog_clear_stale_blocks( | |
1283 | xlog_t *log, | |
1284 | xfs_lsn_t tail_lsn) | |
1285 | { | |
1286 | int tail_cycle, head_cycle; | |
1287 | int tail_block, head_block; | |
1288 | int tail_distance, max_distance; | |
1289 | int distance; | |
1290 | int error; | |
1291 | ||
1292 | tail_cycle = CYCLE_LSN(tail_lsn); | |
1293 | tail_block = BLOCK_LSN(tail_lsn); | |
1294 | head_cycle = log->l_curr_cycle; | |
1295 | head_block = log->l_curr_block; | |
1296 | ||
1297 | /* | |
1298 | * Figure out the distance between the new head of the log | |
1299 | * and the tail. We want to write over any blocks beyond the | |
1300 | * head that we may have written just before the crash, but | |
1301 | * we don't want to overwrite the tail of the log. | |
1302 | */ | |
1303 | if (head_cycle == tail_cycle) { | |
1304 | /* | |
1305 | * The tail is behind the head in the physical log, | |
1306 | * so the distance from the head to the tail is the | |
1307 | * distance from the head to the end of the log plus | |
1308 | * the distance from the beginning of the log to the | |
1309 | * tail. | |
1310 | */ | |
1311 | if (unlikely(head_block < tail_block || head_block >= log->l_logBBsize)) { | |
1312 | XFS_ERROR_REPORT("xlog_clear_stale_blocks(1)", | |
1313 | XFS_ERRLEVEL_LOW, log->l_mp); | |
1314 | return XFS_ERROR(EFSCORRUPTED); | |
1315 | } | |
1316 | tail_distance = tail_block + (log->l_logBBsize - head_block); | |
1317 | } else { | |
1318 | /* | |
1319 | * The head is behind the tail in the physical log, | |
1320 | * so the distance from the head to the tail is just | |
1321 | * the tail block minus the head block. | |
1322 | */ | |
1323 | if (unlikely(head_block >= tail_block || head_cycle != (tail_cycle + 1))){ | |
1324 | XFS_ERROR_REPORT("xlog_clear_stale_blocks(2)", | |
1325 | XFS_ERRLEVEL_LOW, log->l_mp); | |
1326 | return XFS_ERROR(EFSCORRUPTED); | |
1327 | } | |
1328 | tail_distance = tail_block - head_block; | |
1329 | } | |
1330 | ||
1331 | /* | |
1332 | * If the head is right up against the tail, we can't clear | |
1333 | * anything. | |
1334 | */ | |
1335 | if (tail_distance <= 0) { | |
1336 | ASSERT(tail_distance == 0); | |
1337 | return 0; | |
1338 | } | |
1339 | ||
1340 | max_distance = XLOG_TOTAL_REC_SHIFT(log); | |
1341 | /* | |
1342 | * Take the smaller of the maximum amount of outstanding I/O | |
1343 | * we could have and the distance to the tail to clear out. | |
1344 | * We take the smaller so that we don't overwrite the tail and | |
1345 | * we don't waste all day writing from the head to the tail | |
1346 | * for no reason. | |
1347 | */ | |
1348 | max_distance = MIN(max_distance, tail_distance); | |
1349 | ||
1350 | if ((head_block + max_distance) <= log->l_logBBsize) { | |
1351 | /* | |
1352 | * We can stomp all the blocks we need to without | |
1353 | * wrapping around the end of the log. Just do it | |
1354 | * in a single write. Use the cycle number of the | |
1355 | * current cycle minus one so that the log will look like: | |
1356 | * n ... | n - 1 ... | |
1357 | */ | |
1358 | error = xlog_write_log_records(log, (head_cycle - 1), | |
1359 | head_block, max_distance, tail_cycle, | |
1360 | tail_block); | |
1361 | if (error) | |
1362 | return error; | |
1363 | } else { | |
1364 | /* | |
1365 | * We need to wrap around the end of the physical log in | |
1366 | * order to clear all the blocks. Do it in two separate | |
1367 | * I/Os. The first write should be from the head to the | |
1368 | * end of the physical log, and it should use the current | |
1369 | * cycle number minus one just like above. | |
1370 | */ | |
1371 | distance = log->l_logBBsize - head_block; | |
1372 | error = xlog_write_log_records(log, (head_cycle - 1), | |
1373 | head_block, distance, tail_cycle, | |
1374 | tail_block); | |
1375 | ||
1376 | if (error) | |
1377 | return error; | |
1378 | ||
1379 | /* | |
1380 | * Now write the blocks at the start of the physical log. | |
1381 | * This writes the remainder of the blocks we want to clear. | |
1382 | * It uses the current cycle number since we're now on the | |
1383 | * same cycle as the head so that we get: | |
1384 | * n ... n ... | n - 1 ... | |
1385 | * ^^^^^ blocks we're writing | |
1386 | */ | |
1387 | distance = max_distance - (log->l_logBBsize - head_block); | |
1388 | error = xlog_write_log_records(log, head_cycle, 0, distance, | |
1389 | tail_cycle, tail_block); | |
1390 | if (error) | |
1391 | return error; | |
1392 | } | |
1393 | ||
1394 | return 0; | |
1395 | } | |
1396 | ||
1397 | /****************************************************************************** | |
1398 | * | |
1399 | * Log recover routines | |
1400 | * | |
1401 | ****************************************************************************** | |
1402 | */ | |
1403 | ||
1404 | STATIC xlog_recover_t * | |
1405 | xlog_recover_find_tid( | |
f0a76953 | 1406 | struct hlist_head *head, |
1da177e4 LT |
1407 | xlog_tid_t tid) |
1408 | { | |
f0a76953 DC |
1409 | xlog_recover_t *trans; |
1410 | struct hlist_node *n; | |
1da177e4 | 1411 | |
f0a76953 DC |
1412 | hlist_for_each_entry(trans, n, head, r_list) { |
1413 | if (trans->r_log_tid == tid) | |
1414 | return trans; | |
1da177e4 | 1415 | } |
f0a76953 | 1416 | return NULL; |
1da177e4 LT |
1417 | } |
1418 | ||
1419 | STATIC void | |
f0a76953 DC |
1420 | xlog_recover_new_tid( |
1421 | struct hlist_head *head, | |
1422 | xlog_tid_t tid, | |
1423 | xfs_lsn_t lsn) | |
1da177e4 | 1424 | { |
f0a76953 DC |
1425 | xlog_recover_t *trans; |
1426 | ||
1427 | trans = kmem_zalloc(sizeof(xlog_recover_t), KM_SLEEP); | |
1428 | trans->r_log_tid = tid; | |
1429 | trans->r_lsn = lsn; | |
1430 | INIT_LIST_HEAD(&trans->r_itemq); | |
1431 | ||
1432 | INIT_HLIST_NODE(&trans->r_list); | |
1433 | hlist_add_head(&trans->r_list, head); | |
1da177e4 LT |
1434 | } |
1435 | ||
1436 | STATIC void | |
1437 | xlog_recover_add_item( | |
f0a76953 | 1438 | struct list_head *head) |
1da177e4 LT |
1439 | { |
1440 | xlog_recover_item_t *item; | |
1441 | ||
1442 | item = kmem_zalloc(sizeof(xlog_recover_item_t), KM_SLEEP); | |
f0a76953 DC |
1443 | INIT_LIST_HEAD(&item->ri_list); |
1444 | list_add_tail(&item->ri_list, head); | |
1da177e4 LT |
1445 | } |
1446 | ||
1447 | STATIC int | |
1448 | xlog_recover_add_to_cont_trans( | |
9abbc539 | 1449 | struct log *log, |
1da177e4 LT |
1450 | xlog_recover_t *trans, |
1451 | xfs_caddr_t dp, | |
1452 | int len) | |
1453 | { | |
1454 | xlog_recover_item_t *item; | |
1455 | xfs_caddr_t ptr, old_ptr; | |
1456 | int old_len; | |
1457 | ||
f0a76953 | 1458 | if (list_empty(&trans->r_itemq)) { |
1da177e4 LT |
1459 | /* finish copying rest of trans header */ |
1460 | xlog_recover_add_item(&trans->r_itemq); | |
1461 | ptr = (xfs_caddr_t) &trans->r_theader + | |
1462 | sizeof(xfs_trans_header_t) - len; | |
1463 | memcpy(ptr, dp, len); /* d, s, l */ | |
1464 | return 0; | |
1465 | } | |
f0a76953 DC |
1466 | /* take the tail entry */ |
1467 | item = list_entry(trans->r_itemq.prev, xlog_recover_item_t, ri_list); | |
1da177e4 LT |
1468 | |
1469 | old_ptr = item->ri_buf[item->ri_cnt-1].i_addr; | |
1470 | old_len = item->ri_buf[item->ri_cnt-1].i_len; | |
1471 | ||
760dea67 | 1472 | ptr = kmem_realloc(old_ptr, len+old_len, old_len, 0u); |
1da177e4 LT |
1473 | memcpy(&ptr[old_len], dp, len); /* d, s, l */ |
1474 | item->ri_buf[item->ri_cnt-1].i_len += len; | |
1475 | item->ri_buf[item->ri_cnt-1].i_addr = ptr; | |
9abbc539 | 1476 | trace_xfs_log_recover_item_add_cont(log, trans, item, 0); |
1da177e4 LT |
1477 | return 0; |
1478 | } | |
1479 | ||
1480 | /* | |
1481 | * The next region to add is the start of a new region. It could be | |
1482 | * a whole region or it could be the first part of a new region. Because | |
1483 | * of this, the assumption here is that the type and size fields of all | |
1484 | * format structures fit into the first 32 bits of the structure. | |
1485 | * | |
1486 | * This works because all regions must be 32 bit aligned. Therefore, we | |
1487 | * either have both fields or we have neither field. In the case we have | |
1488 | * neither field, the data part of the region is zero length. We only have | |
1489 | * a log_op_header and can throw away the header since a new one will appear | |
1490 | * later. If we have at least 4 bytes, then we can determine how many regions | |
1491 | * will appear in the current log item. | |
1492 | */ | |
1493 | STATIC int | |
1494 | xlog_recover_add_to_trans( | |
9abbc539 | 1495 | struct log *log, |
1da177e4 LT |
1496 | xlog_recover_t *trans, |
1497 | xfs_caddr_t dp, | |
1498 | int len) | |
1499 | { | |
1500 | xfs_inode_log_format_t *in_f; /* any will do */ | |
1501 | xlog_recover_item_t *item; | |
1502 | xfs_caddr_t ptr; | |
1503 | ||
1504 | if (!len) | |
1505 | return 0; | |
f0a76953 | 1506 | if (list_empty(&trans->r_itemq)) { |
5a792c45 DC |
1507 | /* we need to catch log corruptions here */ |
1508 | if (*(uint *)dp != XFS_TRANS_HEADER_MAGIC) { | |
1509 | xlog_warn("XFS: xlog_recover_add_to_trans: " | |
1510 | "bad header magic number"); | |
1511 | ASSERT(0); | |
1512 | return XFS_ERROR(EIO); | |
1513 | } | |
1da177e4 LT |
1514 | if (len == sizeof(xfs_trans_header_t)) |
1515 | xlog_recover_add_item(&trans->r_itemq); | |
1516 | memcpy(&trans->r_theader, dp, len); /* d, s, l */ | |
1517 | return 0; | |
1518 | } | |
1519 | ||
1520 | ptr = kmem_alloc(len, KM_SLEEP); | |
1521 | memcpy(ptr, dp, len); | |
1522 | in_f = (xfs_inode_log_format_t *)ptr; | |
1523 | ||
f0a76953 DC |
1524 | /* take the tail entry */ |
1525 | item = list_entry(trans->r_itemq.prev, xlog_recover_item_t, ri_list); | |
1526 | if (item->ri_total != 0 && | |
1527 | item->ri_total == item->ri_cnt) { | |
1528 | /* tail item is in use, get a new one */ | |
1da177e4 | 1529 | xlog_recover_add_item(&trans->r_itemq); |
f0a76953 DC |
1530 | item = list_entry(trans->r_itemq.prev, |
1531 | xlog_recover_item_t, ri_list); | |
1da177e4 | 1532 | } |
1da177e4 LT |
1533 | |
1534 | if (item->ri_total == 0) { /* first region to be added */ | |
e8fa6b48 CH |
1535 | if (in_f->ilf_size == 0 || |
1536 | in_f->ilf_size > XLOG_MAX_REGIONS_IN_ITEM) { | |
1537 | xlog_warn( | |
1538 | "XFS: bad number of regions (%d) in inode log format", | |
1539 | in_f->ilf_size); | |
1540 | ASSERT(0); | |
1541 | return XFS_ERROR(EIO); | |
1542 | } | |
1543 | ||
1544 | item->ri_total = in_f->ilf_size; | |
1545 | item->ri_buf = | |
1546 | kmem_zalloc(item->ri_total * sizeof(xfs_log_iovec_t), | |
1547 | KM_SLEEP); | |
1da177e4 LT |
1548 | } |
1549 | ASSERT(item->ri_total > item->ri_cnt); | |
1550 | /* Description region is ri_buf[0] */ | |
1551 | item->ri_buf[item->ri_cnt].i_addr = ptr; | |
1552 | item->ri_buf[item->ri_cnt].i_len = len; | |
1553 | item->ri_cnt++; | |
9abbc539 | 1554 | trace_xfs_log_recover_item_add(log, trans, item, 0); |
1da177e4 LT |
1555 | return 0; |
1556 | } | |
1557 | ||
f0a76953 DC |
1558 | /* |
1559 | * Sort the log items in the transaction. Cancelled buffers need | |
1560 | * to be put first so they are processed before any items that might | |
1561 | * modify the buffers. If they are cancelled, then the modifications | |
1562 | * don't need to be replayed. | |
1563 | */ | |
1da177e4 LT |
1564 | STATIC int |
1565 | xlog_recover_reorder_trans( | |
9abbc539 DC |
1566 | struct log *log, |
1567 | xlog_recover_t *trans, | |
1568 | int pass) | |
1da177e4 | 1569 | { |
f0a76953 DC |
1570 | xlog_recover_item_t *item, *n; |
1571 | LIST_HEAD(sort_list); | |
1572 | ||
1573 | list_splice_init(&trans->r_itemq, &sort_list); | |
1574 | list_for_each_entry_safe(item, n, &sort_list, ri_list) { | |
4e0d5f92 | 1575 | xfs_buf_log_format_t *buf_f = item->ri_buf[0].i_addr; |
1da177e4 | 1576 | |
f0a76953 | 1577 | switch (ITEM_TYPE(item)) { |
1da177e4 | 1578 | case XFS_LI_BUF: |
c1155410 | 1579 | if (!(buf_f->blf_flags & XFS_BLF_CANCEL)) { |
9abbc539 DC |
1580 | trace_xfs_log_recover_item_reorder_head(log, |
1581 | trans, item, pass); | |
f0a76953 | 1582 | list_move(&item->ri_list, &trans->r_itemq); |
1da177e4 LT |
1583 | break; |
1584 | } | |
1585 | case XFS_LI_INODE: | |
1da177e4 LT |
1586 | case XFS_LI_DQUOT: |
1587 | case XFS_LI_QUOTAOFF: | |
1588 | case XFS_LI_EFD: | |
1589 | case XFS_LI_EFI: | |
9abbc539 DC |
1590 | trace_xfs_log_recover_item_reorder_tail(log, |
1591 | trans, item, pass); | |
f0a76953 | 1592 | list_move_tail(&item->ri_list, &trans->r_itemq); |
1da177e4 LT |
1593 | break; |
1594 | default: | |
1595 | xlog_warn( | |
1596 | "XFS: xlog_recover_reorder_trans: unrecognized type of log operation"); | |
1597 | ASSERT(0); | |
1598 | return XFS_ERROR(EIO); | |
1599 | } | |
f0a76953 DC |
1600 | } |
1601 | ASSERT(list_empty(&sort_list)); | |
1da177e4 LT |
1602 | return 0; |
1603 | } | |
1604 | ||
1605 | /* | |
1606 | * Build up the table of buf cancel records so that we don't replay | |
1607 | * cancelled data in the second pass. For buffer records that are | |
1608 | * not cancel records, there is nothing to do here so we just return. | |
1609 | * | |
1610 | * If we get a cancel record which is already in the table, this indicates | |
1611 | * that the buffer was cancelled multiple times. In order to ensure | |
1612 | * that during pass 2 we keep the record in the table until we reach its | |
1613 | * last occurrence in the log, we keep a reference count in the cancel | |
1614 | * record in the table to tell us how many times we expect to see this | |
1615 | * record during the second pass. | |
1616 | */ | |
c9f71f5f CH |
1617 | STATIC int |
1618 | xlog_recover_buffer_pass1( | |
d5689eaa | 1619 | struct log *log, |
c9f71f5f | 1620 | xlog_recover_item_t *item) |
1da177e4 | 1621 | { |
c9f71f5f | 1622 | xfs_buf_log_format_t *buf_f = item->ri_buf[0].i_addr; |
d5689eaa CH |
1623 | struct list_head *bucket; |
1624 | struct xfs_buf_cancel *bcp; | |
1da177e4 LT |
1625 | |
1626 | /* | |
1627 | * If this isn't a cancel buffer item, then just return. | |
1628 | */ | |
e2714bf8 | 1629 | if (!(buf_f->blf_flags & XFS_BLF_CANCEL)) { |
9abbc539 | 1630 | trace_xfs_log_recover_buf_not_cancel(log, buf_f); |
c9f71f5f | 1631 | return 0; |
9abbc539 | 1632 | } |
1da177e4 LT |
1633 | |
1634 | /* | |
d5689eaa CH |
1635 | * Insert an xfs_buf_cancel record into the hash table of them. |
1636 | * If there is already an identical record, bump its reference count. | |
1da177e4 | 1637 | */ |
d5689eaa CH |
1638 | bucket = XLOG_BUF_CANCEL_BUCKET(log, buf_f->blf_blkno); |
1639 | list_for_each_entry(bcp, bucket, bc_list) { | |
1640 | if (bcp->bc_blkno == buf_f->blf_blkno && | |
1641 | bcp->bc_len == buf_f->blf_len) { | |
1642 | bcp->bc_refcount++; | |
9abbc539 | 1643 | trace_xfs_log_recover_buf_cancel_ref_inc(log, buf_f); |
c9f71f5f | 1644 | return 0; |
1da177e4 | 1645 | } |
d5689eaa CH |
1646 | } |
1647 | ||
1648 | bcp = kmem_alloc(sizeof(struct xfs_buf_cancel), KM_SLEEP); | |
1649 | bcp->bc_blkno = buf_f->blf_blkno; | |
1650 | bcp->bc_len = buf_f->blf_len; | |
1da177e4 | 1651 | bcp->bc_refcount = 1; |
d5689eaa CH |
1652 | list_add_tail(&bcp->bc_list, bucket); |
1653 | ||
9abbc539 | 1654 | trace_xfs_log_recover_buf_cancel_add(log, buf_f); |
c9f71f5f | 1655 | return 0; |
1da177e4 LT |
1656 | } |
1657 | ||
1658 | /* | |
1659 | * Check to see whether the buffer being recovered has a corresponding | |
1660 | * entry in the buffer cancel record table. If it does then return 1 | |
1661 | * so that it will be cancelled, otherwise return 0. If the buffer is | |
c1155410 | 1662 | * actually a buffer cancel item (XFS_BLF_CANCEL is set), then decrement |
1da177e4 LT |
1663 | * the refcount on the entry in the table and remove it from the table |
1664 | * if this is the last reference. | |
1665 | * | |
1666 | * We remove the cancel record from the table when we encounter its | |
1667 | * last occurrence in the log so that if the same buffer is re-used | |
1668 | * again after its last cancellation we actually replay the changes | |
1669 | * made at that point. | |
1670 | */ | |
1671 | STATIC int | |
1672 | xlog_check_buffer_cancelled( | |
d5689eaa | 1673 | struct log *log, |
1da177e4 LT |
1674 | xfs_daddr_t blkno, |
1675 | uint len, | |
1676 | ushort flags) | |
1677 | { | |
d5689eaa CH |
1678 | struct list_head *bucket; |
1679 | struct xfs_buf_cancel *bcp; | |
1da177e4 LT |
1680 | |
1681 | if (log->l_buf_cancel_table == NULL) { | |
1682 | /* | |
1683 | * There is nothing in the table built in pass one, | |
1684 | * so this buffer must not be cancelled. | |
1685 | */ | |
c1155410 | 1686 | ASSERT(!(flags & XFS_BLF_CANCEL)); |
1da177e4 LT |
1687 | return 0; |
1688 | } | |
1689 | ||
1da177e4 | 1690 | /* |
d5689eaa | 1691 | * Search for an entry in the cancel table that matches our buffer. |
1da177e4 | 1692 | */ |
d5689eaa CH |
1693 | bucket = XLOG_BUF_CANCEL_BUCKET(log, blkno); |
1694 | list_for_each_entry(bcp, bucket, bc_list) { | |
1695 | if (bcp->bc_blkno == blkno && bcp->bc_len == len) | |
1696 | goto found; | |
1da177e4 | 1697 | } |
d5689eaa | 1698 | |
1da177e4 | 1699 | /* |
d5689eaa CH |
1700 | * We didn't find a corresponding entry in the table, so return 0 so |
1701 | * that the buffer is NOT cancelled. | |
1da177e4 | 1702 | */ |
c1155410 | 1703 | ASSERT(!(flags & XFS_BLF_CANCEL)); |
1da177e4 | 1704 | return 0; |
d5689eaa CH |
1705 | |
1706 | found: | |
1707 | /* | |
1708 | * We've go a match, so return 1 so that the recovery of this buffer | |
1709 | * is cancelled. If this buffer is actually a buffer cancel log | |
1710 | * item, then decrement the refcount on the one in the table and | |
1711 | * remove it if this is the last reference. | |
1712 | */ | |
1713 | if (flags & XFS_BLF_CANCEL) { | |
1714 | if (--bcp->bc_refcount == 0) { | |
1715 | list_del(&bcp->bc_list); | |
1716 | kmem_free(bcp); | |
1717 | } | |
1718 | } | |
1719 | return 1; | |
1da177e4 LT |
1720 | } |
1721 | ||
1da177e4 | 1722 | /* |
e2714bf8 CH |
1723 | * Perform recovery for a buffer full of inodes. In these buffers, the only |
1724 | * data which should be recovered is that which corresponds to the | |
1725 | * di_next_unlinked pointers in the on disk inode structures. The rest of the | |
1726 | * data for the inodes is always logged through the inodes themselves rather | |
1727 | * than the inode buffer and is recovered in xlog_recover_inode_pass2(). | |
1da177e4 | 1728 | * |
e2714bf8 CH |
1729 | * The only time when buffers full of inodes are fully recovered is when the |
1730 | * buffer is full of newly allocated inodes. In this case the buffer will | |
1731 | * not be marked as an inode buffer and so will be sent to | |
1732 | * xlog_recover_do_reg_buffer() below during recovery. | |
1da177e4 LT |
1733 | */ |
1734 | STATIC int | |
1735 | xlog_recover_do_inode_buffer( | |
e2714bf8 | 1736 | struct xfs_mount *mp, |
1da177e4 | 1737 | xlog_recover_item_t *item, |
e2714bf8 | 1738 | struct xfs_buf *bp, |
1da177e4 LT |
1739 | xfs_buf_log_format_t *buf_f) |
1740 | { | |
1741 | int i; | |
e2714bf8 CH |
1742 | int item_index = 0; |
1743 | int bit = 0; | |
1744 | int nbits = 0; | |
1745 | int reg_buf_offset = 0; | |
1746 | int reg_buf_bytes = 0; | |
1da177e4 LT |
1747 | int next_unlinked_offset; |
1748 | int inodes_per_buf; | |
1749 | xfs_agino_t *logged_nextp; | |
1750 | xfs_agino_t *buffer_nextp; | |
1da177e4 | 1751 | |
9abbc539 DC |
1752 | trace_xfs_log_recover_buf_inode_buf(mp->m_log, buf_f); |
1753 | ||
1da177e4 LT |
1754 | inodes_per_buf = XFS_BUF_COUNT(bp) >> mp->m_sb.sb_inodelog; |
1755 | for (i = 0; i < inodes_per_buf; i++) { | |
1756 | next_unlinked_offset = (i * mp->m_sb.sb_inodesize) + | |
1757 | offsetof(xfs_dinode_t, di_next_unlinked); | |
1758 | ||
1759 | while (next_unlinked_offset >= | |
1760 | (reg_buf_offset + reg_buf_bytes)) { | |
1761 | /* | |
1762 | * The next di_next_unlinked field is beyond | |
1763 | * the current logged region. Find the next | |
1764 | * logged region that contains or is beyond | |
1765 | * the current di_next_unlinked field. | |
1766 | */ | |
1767 | bit += nbits; | |
e2714bf8 CH |
1768 | bit = xfs_next_bit(buf_f->blf_data_map, |
1769 | buf_f->blf_map_size, bit); | |
1da177e4 LT |
1770 | |
1771 | /* | |
1772 | * If there are no more logged regions in the | |
1773 | * buffer, then we're done. | |
1774 | */ | |
e2714bf8 | 1775 | if (bit == -1) |
1da177e4 | 1776 | return 0; |
1da177e4 | 1777 | |
e2714bf8 CH |
1778 | nbits = xfs_contig_bits(buf_f->blf_data_map, |
1779 | buf_f->blf_map_size, bit); | |
1da177e4 | 1780 | ASSERT(nbits > 0); |
c1155410 DC |
1781 | reg_buf_offset = bit << XFS_BLF_SHIFT; |
1782 | reg_buf_bytes = nbits << XFS_BLF_SHIFT; | |
1da177e4 LT |
1783 | item_index++; |
1784 | } | |
1785 | ||
1786 | /* | |
1787 | * If the current logged region starts after the current | |
1788 | * di_next_unlinked field, then move on to the next | |
1789 | * di_next_unlinked field. | |
1790 | */ | |
e2714bf8 | 1791 | if (next_unlinked_offset < reg_buf_offset) |
1da177e4 | 1792 | continue; |
1da177e4 LT |
1793 | |
1794 | ASSERT(item->ri_buf[item_index].i_addr != NULL); | |
c1155410 | 1795 | ASSERT((item->ri_buf[item_index].i_len % XFS_BLF_CHUNK) == 0); |
1da177e4 LT |
1796 | ASSERT((reg_buf_offset + reg_buf_bytes) <= XFS_BUF_COUNT(bp)); |
1797 | ||
1798 | /* | |
1799 | * The current logged region contains a copy of the | |
1800 | * current di_next_unlinked field. Extract its value | |
1801 | * and copy it to the buffer copy. | |
1802 | */ | |
4e0d5f92 CH |
1803 | logged_nextp = item->ri_buf[item_index].i_addr + |
1804 | next_unlinked_offset - reg_buf_offset; | |
1da177e4 LT |
1805 | if (unlikely(*logged_nextp == 0)) { |
1806 | xfs_fs_cmn_err(CE_ALERT, mp, | |
1807 | "bad inode buffer log record (ptr = 0x%p, bp = 0x%p). XFS trying to replay bad (0) inode di_next_unlinked field", | |
1808 | item, bp); | |
1809 | XFS_ERROR_REPORT("xlog_recover_do_inode_buf", | |
1810 | XFS_ERRLEVEL_LOW, mp); | |
1811 | return XFS_ERROR(EFSCORRUPTED); | |
1812 | } | |
1813 | ||
1814 | buffer_nextp = (xfs_agino_t *)xfs_buf_offset(bp, | |
1815 | next_unlinked_offset); | |
87c199c2 | 1816 | *buffer_nextp = *logged_nextp; |
1da177e4 LT |
1817 | } |
1818 | ||
1819 | return 0; | |
1820 | } | |
1821 | ||
1822 | /* | |
1823 | * Perform a 'normal' buffer recovery. Each logged region of the | |
1824 | * buffer should be copied over the corresponding region in the | |
1825 | * given buffer. The bitmap in the buf log format structure indicates | |
1826 | * where to place the logged data. | |
1827 | */ | |
1da177e4 LT |
1828 | STATIC void |
1829 | xlog_recover_do_reg_buffer( | |
9abbc539 | 1830 | struct xfs_mount *mp, |
1da177e4 | 1831 | xlog_recover_item_t *item, |
e2714bf8 | 1832 | struct xfs_buf *bp, |
1da177e4 LT |
1833 | xfs_buf_log_format_t *buf_f) |
1834 | { | |
1835 | int i; | |
1836 | int bit; | |
1837 | int nbits; | |
1da177e4 LT |
1838 | int error; |
1839 | ||
9abbc539 DC |
1840 | trace_xfs_log_recover_buf_reg_buf(mp->m_log, buf_f); |
1841 | ||
1da177e4 LT |
1842 | bit = 0; |
1843 | i = 1; /* 0 is the buf format structure */ | |
1844 | while (1) { | |
e2714bf8 CH |
1845 | bit = xfs_next_bit(buf_f->blf_data_map, |
1846 | buf_f->blf_map_size, bit); | |
1da177e4 LT |
1847 | if (bit == -1) |
1848 | break; | |
e2714bf8 CH |
1849 | nbits = xfs_contig_bits(buf_f->blf_data_map, |
1850 | buf_f->blf_map_size, bit); | |
1da177e4 | 1851 | ASSERT(nbits > 0); |
4b80916b | 1852 | ASSERT(item->ri_buf[i].i_addr != NULL); |
c1155410 | 1853 | ASSERT(item->ri_buf[i].i_len % XFS_BLF_CHUNK == 0); |
1da177e4 | 1854 | ASSERT(XFS_BUF_COUNT(bp) >= |
c1155410 | 1855 | ((uint)bit << XFS_BLF_SHIFT)+(nbits<<XFS_BLF_SHIFT)); |
1da177e4 LT |
1856 | |
1857 | /* | |
1858 | * Do a sanity check if this is a dquot buffer. Just checking | |
1859 | * the first dquot in the buffer should do. XXXThis is | |
1860 | * probably a good thing to do for other buf types also. | |
1861 | */ | |
1862 | error = 0; | |
c8ad20ff | 1863 | if (buf_f->blf_flags & |
c1155410 | 1864 | (XFS_BLF_UDQUOT_BUF|XFS_BLF_PDQUOT_BUF|XFS_BLF_GDQUOT_BUF)) { |
0c5e1ce8 CH |
1865 | if (item->ri_buf[i].i_addr == NULL) { |
1866 | cmn_err(CE_ALERT, | |
1867 | "XFS: NULL dquot in %s.", __func__); | |
1868 | goto next; | |
1869 | } | |
8ec6dba2 | 1870 | if (item->ri_buf[i].i_len < sizeof(xfs_disk_dquot_t)) { |
0c5e1ce8 CH |
1871 | cmn_err(CE_ALERT, |
1872 | "XFS: dquot too small (%d) in %s.", | |
1873 | item->ri_buf[i].i_len, __func__); | |
1874 | goto next; | |
1875 | } | |
4e0d5f92 | 1876 | error = xfs_qm_dqcheck(item->ri_buf[i].i_addr, |
1da177e4 LT |
1877 | -1, 0, XFS_QMOPT_DOWARN, |
1878 | "dquot_buf_recover"); | |
0c5e1ce8 CH |
1879 | if (error) |
1880 | goto next; | |
1da177e4 | 1881 | } |
0c5e1ce8 CH |
1882 | |
1883 | memcpy(xfs_buf_offset(bp, | |
c1155410 | 1884 | (uint)bit << XFS_BLF_SHIFT), /* dest */ |
0c5e1ce8 | 1885 | item->ri_buf[i].i_addr, /* source */ |
c1155410 | 1886 | nbits<<XFS_BLF_SHIFT); /* length */ |
0c5e1ce8 | 1887 | next: |
1da177e4 LT |
1888 | i++; |
1889 | bit += nbits; | |
1890 | } | |
1891 | ||
1892 | /* Shouldn't be any more regions */ | |
1893 | ASSERT(i == item->ri_total); | |
1894 | } | |
1895 | ||
1896 | /* | |
1897 | * Do some primitive error checking on ondisk dquot data structures. | |
1898 | */ | |
1899 | int | |
1900 | xfs_qm_dqcheck( | |
1901 | xfs_disk_dquot_t *ddq, | |
1902 | xfs_dqid_t id, | |
1903 | uint type, /* used only when IO_dorepair is true */ | |
1904 | uint flags, | |
1905 | char *str) | |
1906 | { | |
1907 | xfs_dqblk_t *d = (xfs_dqblk_t *)ddq; | |
1908 | int errs = 0; | |
1909 | ||
1910 | /* | |
1911 | * We can encounter an uninitialized dquot buffer for 2 reasons: | |
1912 | * 1. If we crash while deleting the quotainode(s), and those blks got | |
1913 | * used for user data. This is because we take the path of regular | |
1914 | * file deletion; however, the size field of quotainodes is never | |
1915 | * updated, so all the tricks that we play in itruncate_finish | |
1916 | * don't quite matter. | |
1917 | * | |
1918 | * 2. We don't play the quota buffers when there's a quotaoff logitem. | |
1919 | * But the allocation will be replayed so we'll end up with an | |
1920 | * uninitialized quota block. | |
1921 | * | |
1922 | * This is all fine; things are still consistent, and we haven't lost | |
1923 | * any quota information. Just don't complain about bad dquot blks. | |
1924 | */ | |
1149d96a | 1925 | if (be16_to_cpu(ddq->d_magic) != XFS_DQUOT_MAGIC) { |
1da177e4 LT |
1926 | if (flags & XFS_QMOPT_DOWARN) |
1927 | cmn_err(CE_ALERT, | |
1928 | "%s : XFS dquot ID 0x%x, magic 0x%x != 0x%x", | |
1149d96a | 1929 | str, id, be16_to_cpu(ddq->d_magic), XFS_DQUOT_MAGIC); |
1da177e4 LT |
1930 | errs++; |
1931 | } | |
1149d96a | 1932 | if (ddq->d_version != XFS_DQUOT_VERSION) { |
1da177e4 LT |
1933 | if (flags & XFS_QMOPT_DOWARN) |
1934 | cmn_err(CE_ALERT, | |
1935 | "%s : XFS dquot ID 0x%x, version 0x%x != 0x%x", | |
1149d96a | 1936 | str, id, ddq->d_version, XFS_DQUOT_VERSION); |
1da177e4 LT |
1937 | errs++; |
1938 | } | |
1939 | ||
1149d96a CH |
1940 | if (ddq->d_flags != XFS_DQ_USER && |
1941 | ddq->d_flags != XFS_DQ_PROJ && | |
1942 | ddq->d_flags != XFS_DQ_GROUP) { | |
1da177e4 LT |
1943 | if (flags & XFS_QMOPT_DOWARN) |
1944 | cmn_err(CE_ALERT, | |
1945 | "%s : XFS dquot ID 0x%x, unknown flags 0x%x", | |
1149d96a | 1946 | str, id, ddq->d_flags); |
1da177e4 LT |
1947 | errs++; |
1948 | } | |
1949 | ||
1149d96a | 1950 | if (id != -1 && id != be32_to_cpu(ddq->d_id)) { |
1da177e4 LT |
1951 | if (flags & XFS_QMOPT_DOWARN) |
1952 | cmn_err(CE_ALERT, | |
1953 | "%s : ondisk-dquot 0x%p, ID mismatch: " | |
1954 | "0x%x expected, found id 0x%x", | |
1149d96a | 1955 | str, ddq, id, be32_to_cpu(ddq->d_id)); |
1da177e4 LT |
1956 | errs++; |
1957 | } | |
1958 | ||
1959 | if (!errs && ddq->d_id) { | |
1149d96a CH |
1960 | if (ddq->d_blk_softlimit && |
1961 | be64_to_cpu(ddq->d_bcount) >= | |
1962 | be64_to_cpu(ddq->d_blk_softlimit)) { | |
1da177e4 LT |
1963 | if (!ddq->d_btimer) { |
1964 | if (flags & XFS_QMOPT_DOWARN) | |
1965 | cmn_err(CE_ALERT, | |
1966 | "%s : Dquot ID 0x%x (0x%p) " | |
1967 | "BLK TIMER NOT STARTED", | |
1149d96a | 1968 | str, (int)be32_to_cpu(ddq->d_id), ddq); |
1da177e4 LT |
1969 | errs++; |
1970 | } | |
1971 | } | |
1149d96a CH |
1972 | if (ddq->d_ino_softlimit && |
1973 | be64_to_cpu(ddq->d_icount) >= | |
1974 | be64_to_cpu(ddq->d_ino_softlimit)) { | |
1da177e4 LT |
1975 | if (!ddq->d_itimer) { |
1976 | if (flags & XFS_QMOPT_DOWARN) | |
1977 | cmn_err(CE_ALERT, | |
1978 | "%s : Dquot ID 0x%x (0x%p) " | |
1979 | "INODE TIMER NOT STARTED", | |
1149d96a | 1980 | str, (int)be32_to_cpu(ddq->d_id), ddq); |
1da177e4 LT |
1981 | errs++; |
1982 | } | |
1983 | } | |
1149d96a CH |
1984 | if (ddq->d_rtb_softlimit && |
1985 | be64_to_cpu(ddq->d_rtbcount) >= | |
1986 | be64_to_cpu(ddq->d_rtb_softlimit)) { | |
1da177e4 LT |
1987 | if (!ddq->d_rtbtimer) { |
1988 | if (flags & XFS_QMOPT_DOWARN) | |
1989 | cmn_err(CE_ALERT, | |
1990 | "%s : Dquot ID 0x%x (0x%p) " | |
1991 | "RTBLK TIMER NOT STARTED", | |
1149d96a | 1992 | str, (int)be32_to_cpu(ddq->d_id), ddq); |
1da177e4 LT |
1993 | errs++; |
1994 | } | |
1995 | } | |
1996 | } | |
1997 | ||
1998 | if (!errs || !(flags & XFS_QMOPT_DQREPAIR)) | |
1999 | return errs; | |
2000 | ||
2001 | if (flags & XFS_QMOPT_DOWARN) | |
2002 | cmn_err(CE_NOTE, "Re-initializing dquot ID 0x%x", id); | |
2003 | ||
2004 | /* | |
2005 | * Typically, a repair is only requested by quotacheck. | |
2006 | */ | |
2007 | ASSERT(id != -1); | |
2008 | ASSERT(flags & XFS_QMOPT_DQREPAIR); | |
2009 | memset(d, 0, sizeof(xfs_dqblk_t)); | |
1149d96a CH |
2010 | |
2011 | d->dd_diskdq.d_magic = cpu_to_be16(XFS_DQUOT_MAGIC); | |
2012 | d->dd_diskdq.d_version = XFS_DQUOT_VERSION; | |
2013 | d->dd_diskdq.d_flags = type; | |
2014 | d->dd_diskdq.d_id = cpu_to_be32(id); | |
1da177e4 LT |
2015 | |
2016 | return errs; | |
2017 | } | |
2018 | ||
2019 | /* | |
2020 | * Perform a dquot buffer recovery. | |
2021 | * Simple algorithm: if we have found a QUOTAOFF logitem of the same type | |
2022 | * (ie. USR or GRP), then just toss this buffer away; don't recover it. | |
2023 | * Else, treat it as a regular buffer and do recovery. | |
2024 | */ | |
2025 | STATIC void | |
2026 | xlog_recover_do_dquot_buffer( | |
2027 | xfs_mount_t *mp, | |
2028 | xlog_t *log, | |
2029 | xlog_recover_item_t *item, | |
2030 | xfs_buf_t *bp, | |
2031 | xfs_buf_log_format_t *buf_f) | |
2032 | { | |
2033 | uint type; | |
2034 | ||
9abbc539 DC |
2035 | trace_xfs_log_recover_buf_dquot_buf(log, buf_f); |
2036 | ||
1da177e4 LT |
2037 | /* |
2038 | * Filesystems are required to send in quota flags at mount time. | |
2039 | */ | |
2040 | if (mp->m_qflags == 0) { | |
2041 | return; | |
2042 | } | |
2043 | ||
2044 | type = 0; | |
c1155410 | 2045 | if (buf_f->blf_flags & XFS_BLF_UDQUOT_BUF) |
1da177e4 | 2046 | type |= XFS_DQ_USER; |
c1155410 | 2047 | if (buf_f->blf_flags & XFS_BLF_PDQUOT_BUF) |
c8ad20ff | 2048 | type |= XFS_DQ_PROJ; |
c1155410 | 2049 | if (buf_f->blf_flags & XFS_BLF_GDQUOT_BUF) |
1da177e4 LT |
2050 | type |= XFS_DQ_GROUP; |
2051 | /* | |
2052 | * This type of quotas was turned off, so ignore this buffer | |
2053 | */ | |
2054 | if (log->l_quotaoffs_flag & type) | |
2055 | return; | |
2056 | ||
9abbc539 | 2057 | xlog_recover_do_reg_buffer(mp, item, bp, buf_f); |
1da177e4 LT |
2058 | } |
2059 | ||
2060 | /* | |
2061 | * This routine replays a modification made to a buffer at runtime. | |
2062 | * There are actually two types of buffer, regular and inode, which | |
2063 | * are handled differently. Inode buffers are handled differently | |
2064 | * in that we only recover a specific set of data from them, namely | |
2065 | * the inode di_next_unlinked fields. This is because all other inode | |
2066 | * data is actually logged via inode records and any data we replay | |
2067 | * here which overlaps that may be stale. | |
2068 | * | |
2069 | * When meta-data buffers are freed at run time we log a buffer item | |
c1155410 | 2070 | * with the XFS_BLF_CANCEL bit set to indicate that previous copies |
1da177e4 LT |
2071 | * of the buffer in the log should not be replayed at recovery time. |
2072 | * This is so that if the blocks covered by the buffer are reused for | |
2073 | * file data before we crash we don't end up replaying old, freed | |
2074 | * meta-data into a user's file. | |
2075 | * | |
2076 | * To handle the cancellation of buffer log items, we make two passes | |
2077 | * over the log during recovery. During the first we build a table of | |
2078 | * those buffers which have been cancelled, and during the second we | |
2079 | * only replay those buffers which do not have corresponding cancel | |
2080 | * records in the table. See xlog_recover_do_buffer_pass[1,2] above | |
2081 | * for more details on the implementation of the table of cancel records. | |
2082 | */ | |
2083 | STATIC int | |
c9f71f5f | 2084 | xlog_recover_buffer_pass2( |
1da177e4 | 2085 | xlog_t *log, |
c9f71f5f | 2086 | xlog_recover_item_t *item) |
1da177e4 | 2087 | { |
4e0d5f92 | 2088 | xfs_buf_log_format_t *buf_f = item->ri_buf[0].i_addr; |
e2714bf8 | 2089 | xfs_mount_t *mp = log->l_mp; |
1da177e4 LT |
2090 | xfs_buf_t *bp; |
2091 | int error; | |
6ad112bf | 2092 | uint buf_flags; |
1da177e4 | 2093 | |
c9f71f5f CH |
2094 | /* |
2095 | * In this pass we only want to recover all the buffers which have | |
2096 | * not been cancelled and are not cancellation buffers themselves. | |
2097 | */ | |
2098 | if (xlog_check_buffer_cancelled(log, buf_f->blf_blkno, | |
2099 | buf_f->blf_len, buf_f->blf_flags)) { | |
2100 | trace_xfs_log_recover_buf_cancel(log, buf_f); | |
1da177e4 | 2101 | return 0; |
1da177e4 | 2102 | } |
c9f71f5f | 2103 | |
9abbc539 | 2104 | trace_xfs_log_recover_buf_recover(log, buf_f); |
1da177e4 | 2105 | |
0cadda1c | 2106 | buf_flags = XBF_LOCK; |
e2714bf8 | 2107 | if (!(buf_f->blf_flags & XFS_BLF_INODE_BUF)) |
0cadda1c | 2108 | buf_flags |= XBF_MAPPED; |
6ad112bf | 2109 | |
e2714bf8 CH |
2110 | bp = xfs_buf_read(mp->m_ddev_targp, buf_f->blf_blkno, buf_f->blf_len, |
2111 | buf_flags); | |
1da177e4 | 2112 | if (XFS_BUF_ISERROR(bp)) { |
e2714bf8 CH |
2113 | xfs_ioerror_alert("xlog_recover_do..(read#1)", mp, |
2114 | bp, buf_f->blf_blkno); | |
1da177e4 LT |
2115 | error = XFS_BUF_GETERROR(bp); |
2116 | xfs_buf_relse(bp); | |
2117 | return error; | |
2118 | } | |
2119 | ||
2120 | error = 0; | |
e2714bf8 | 2121 | if (buf_f->blf_flags & XFS_BLF_INODE_BUF) { |
1da177e4 | 2122 | error = xlog_recover_do_inode_buffer(mp, item, bp, buf_f); |
e2714bf8 | 2123 | } else if (buf_f->blf_flags & |
c1155410 | 2124 | (XFS_BLF_UDQUOT_BUF|XFS_BLF_PDQUOT_BUF|XFS_BLF_GDQUOT_BUF)) { |
1da177e4 LT |
2125 | xlog_recover_do_dquot_buffer(mp, log, item, bp, buf_f); |
2126 | } else { | |
9abbc539 | 2127 | xlog_recover_do_reg_buffer(mp, item, bp, buf_f); |
1da177e4 LT |
2128 | } |
2129 | if (error) | |
2130 | return XFS_ERROR(error); | |
2131 | ||
2132 | /* | |
2133 | * Perform delayed write on the buffer. Asynchronous writes will be | |
2134 | * slower when taking into account all the buffers to be flushed. | |
2135 | * | |
2136 | * Also make sure that only inode buffers with good sizes stay in | |
2137 | * the buffer cache. The kernel moves inodes in buffers of 1 block | |
2138 | * or XFS_INODE_CLUSTER_SIZE bytes, whichever is bigger. The inode | |
2139 | * buffers in the log can be a different size if the log was generated | |
2140 | * by an older kernel using unclustered inode buffers or a newer kernel | |
2141 | * running with a different inode cluster size. Regardless, if the | |
2142 | * the inode buffer size isn't MAX(blocksize, XFS_INODE_CLUSTER_SIZE) | |
2143 | * for *our* value of XFS_INODE_CLUSTER_SIZE, then we need to keep | |
2144 | * the buffer out of the buffer cache so that the buffer won't | |
2145 | * overlap with future reads of those inodes. | |
2146 | */ | |
2147 | if (XFS_DINODE_MAGIC == | |
b53e675d | 2148 | be16_to_cpu(*((__be16 *)xfs_buf_offset(bp, 0))) && |
1da177e4 LT |
2149 | (XFS_BUF_COUNT(bp) != MAX(log->l_mp->m_sb.sb_blocksize, |
2150 | (__uint32_t)XFS_INODE_CLUSTER_SIZE(log->l_mp)))) { | |
2151 | XFS_BUF_STALE(bp); | |
2152 | error = xfs_bwrite(mp, bp); | |
2153 | } else { | |
ebad861b | 2154 | ASSERT(bp->b_target->bt_mount == mp); |
1da177e4 LT |
2155 | XFS_BUF_SET_IODONE_FUNC(bp, xlog_recover_iodone); |
2156 | xfs_bdwrite(mp, bp); | |
2157 | } | |
2158 | ||
2159 | return (error); | |
2160 | } | |
2161 | ||
2162 | STATIC int | |
c9f71f5f | 2163 | xlog_recover_inode_pass2( |
1da177e4 | 2164 | xlog_t *log, |
c9f71f5f | 2165 | xlog_recover_item_t *item) |
1da177e4 LT |
2166 | { |
2167 | xfs_inode_log_format_t *in_f; | |
c9f71f5f | 2168 | xfs_mount_t *mp = log->l_mp; |
1da177e4 | 2169 | xfs_buf_t *bp; |
1da177e4 | 2170 | xfs_dinode_t *dip; |
1da177e4 LT |
2171 | int len; |
2172 | xfs_caddr_t src; | |
2173 | xfs_caddr_t dest; | |
2174 | int error; | |
2175 | int attr_index; | |
2176 | uint fields; | |
347d1c01 | 2177 | xfs_icdinode_t *dicp; |
6d192a9b | 2178 | int need_free = 0; |
1da177e4 | 2179 | |
6d192a9b | 2180 | if (item->ri_buf[0].i_len == sizeof(xfs_inode_log_format_t)) { |
4e0d5f92 | 2181 | in_f = item->ri_buf[0].i_addr; |
6d192a9b | 2182 | } else { |
4e0d5f92 | 2183 | in_f = kmem_alloc(sizeof(xfs_inode_log_format_t), KM_SLEEP); |
6d192a9b TS |
2184 | need_free = 1; |
2185 | error = xfs_inode_item_format_convert(&item->ri_buf[0], in_f); | |
2186 | if (error) | |
2187 | goto error; | |
2188 | } | |
1da177e4 LT |
2189 | |
2190 | /* | |
2191 | * Inode buffers can be freed, look out for it, | |
2192 | * and do not replay the inode. | |
2193 | */ | |
a1941895 CH |
2194 | if (xlog_check_buffer_cancelled(log, in_f->ilf_blkno, |
2195 | in_f->ilf_len, 0)) { | |
6d192a9b | 2196 | error = 0; |
9abbc539 | 2197 | trace_xfs_log_recover_inode_cancel(log, in_f); |
6d192a9b TS |
2198 | goto error; |
2199 | } | |
9abbc539 | 2200 | trace_xfs_log_recover_inode_recover(log, in_f); |
1da177e4 | 2201 | |
6ad112bf | 2202 | bp = xfs_buf_read(mp->m_ddev_targp, in_f->ilf_blkno, in_f->ilf_len, |
0cadda1c | 2203 | XBF_LOCK); |
1da177e4 LT |
2204 | if (XFS_BUF_ISERROR(bp)) { |
2205 | xfs_ioerror_alert("xlog_recover_do..(read#2)", mp, | |
a1941895 | 2206 | bp, in_f->ilf_blkno); |
1da177e4 LT |
2207 | error = XFS_BUF_GETERROR(bp); |
2208 | xfs_buf_relse(bp); | |
6d192a9b | 2209 | goto error; |
1da177e4 LT |
2210 | } |
2211 | error = 0; | |
2212 | ASSERT(in_f->ilf_fields & XFS_ILOG_CORE); | |
a1941895 | 2213 | dip = (xfs_dinode_t *)xfs_buf_offset(bp, in_f->ilf_boffset); |
1da177e4 LT |
2214 | |
2215 | /* | |
2216 | * Make sure the place we're flushing out to really looks | |
2217 | * like an inode! | |
2218 | */ | |
81591fe2 | 2219 | if (unlikely(be16_to_cpu(dip->di_magic) != XFS_DINODE_MAGIC)) { |
1da177e4 LT |
2220 | xfs_buf_relse(bp); |
2221 | xfs_fs_cmn_err(CE_ALERT, mp, | |
2222 | "xfs_inode_recover: Bad inode magic number, dino ptr = 0x%p, dino bp = 0x%p, ino = %Ld", | |
c9f71f5f CH |
2223 | dip, bp, in_f->ilf_ino); |
2224 | XFS_ERROR_REPORT("xlog_recover_inode_pass2(1)", | |
1da177e4 | 2225 | XFS_ERRLEVEL_LOW, mp); |
6d192a9b TS |
2226 | error = EFSCORRUPTED; |
2227 | goto error; | |
1da177e4 | 2228 | } |
4e0d5f92 | 2229 | dicp = item->ri_buf[1].i_addr; |
1da177e4 LT |
2230 | if (unlikely(dicp->di_magic != XFS_DINODE_MAGIC)) { |
2231 | xfs_buf_relse(bp); | |
2232 | xfs_fs_cmn_err(CE_ALERT, mp, | |
2233 | "xfs_inode_recover: Bad inode log record, rec ptr 0x%p, ino %Ld", | |
c9f71f5f CH |
2234 | item, in_f->ilf_ino); |
2235 | XFS_ERROR_REPORT("xlog_recover_inode_pass2(2)", | |
1da177e4 | 2236 | XFS_ERRLEVEL_LOW, mp); |
6d192a9b TS |
2237 | error = EFSCORRUPTED; |
2238 | goto error; | |
1da177e4 LT |
2239 | } |
2240 | ||
2241 | /* Skip replay when the on disk inode is newer than the log one */ | |
81591fe2 | 2242 | if (dicp->di_flushiter < be16_to_cpu(dip->di_flushiter)) { |
1da177e4 LT |
2243 | /* |
2244 | * Deal with the wrap case, DI_MAX_FLUSH is less | |
2245 | * than smaller numbers | |
2246 | */ | |
81591fe2 | 2247 | if (be16_to_cpu(dip->di_flushiter) == DI_MAX_FLUSH && |
347d1c01 | 2248 | dicp->di_flushiter < (DI_MAX_FLUSH >> 1)) { |
1da177e4 LT |
2249 | /* do nothing */ |
2250 | } else { | |
2251 | xfs_buf_relse(bp); | |
9abbc539 | 2252 | trace_xfs_log_recover_inode_skip(log, in_f); |
6d192a9b TS |
2253 | error = 0; |
2254 | goto error; | |
1da177e4 LT |
2255 | } |
2256 | } | |
2257 | /* Take the opportunity to reset the flush iteration count */ | |
2258 | dicp->di_flushiter = 0; | |
2259 | ||
2260 | if (unlikely((dicp->di_mode & S_IFMT) == S_IFREG)) { | |
2261 | if ((dicp->di_format != XFS_DINODE_FMT_EXTENTS) && | |
2262 | (dicp->di_format != XFS_DINODE_FMT_BTREE)) { | |
c9f71f5f | 2263 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(3)", |
1da177e4 LT |
2264 | XFS_ERRLEVEL_LOW, mp, dicp); |
2265 | xfs_buf_relse(bp); | |
2266 | xfs_fs_cmn_err(CE_ALERT, mp, | |
2267 | "xfs_inode_recover: Bad regular inode log record, rec ptr 0x%p, ino ptr = 0x%p, ino bp = 0x%p, ino %Ld", | |
c9f71f5f | 2268 | item, dip, bp, in_f->ilf_ino); |
6d192a9b TS |
2269 | error = EFSCORRUPTED; |
2270 | goto error; | |
1da177e4 LT |
2271 | } |
2272 | } else if (unlikely((dicp->di_mode & S_IFMT) == S_IFDIR)) { | |
2273 | if ((dicp->di_format != XFS_DINODE_FMT_EXTENTS) && | |
2274 | (dicp->di_format != XFS_DINODE_FMT_BTREE) && | |
2275 | (dicp->di_format != XFS_DINODE_FMT_LOCAL)) { | |
c9f71f5f | 2276 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(4)", |
1da177e4 LT |
2277 | XFS_ERRLEVEL_LOW, mp, dicp); |
2278 | xfs_buf_relse(bp); | |
2279 | xfs_fs_cmn_err(CE_ALERT, mp, | |
2280 | "xfs_inode_recover: Bad dir inode log record, rec ptr 0x%p, ino ptr = 0x%p, ino bp = 0x%p, ino %Ld", | |
c9f71f5f | 2281 | item, dip, bp, in_f->ilf_ino); |
6d192a9b TS |
2282 | error = EFSCORRUPTED; |
2283 | goto error; | |
1da177e4 LT |
2284 | } |
2285 | } | |
2286 | if (unlikely(dicp->di_nextents + dicp->di_anextents > dicp->di_nblocks)){ | |
c9f71f5f | 2287 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(5)", |
1da177e4 LT |
2288 | XFS_ERRLEVEL_LOW, mp, dicp); |
2289 | xfs_buf_relse(bp); | |
2290 | xfs_fs_cmn_err(CE_ALERT, mp, | |
2291 | "xfs_inode_recover: Bad inode log record, rec ptr 0x%p, dino ptr 0x%p, dino bp 0x%p, ino %Ld, total extents = %d, nblocks = %Ld", | |
c9f71f5f | 2292 | item, dip, bp, in_f->ilf_ino, |
1da177e4 LT |
2293 | dicp->di_nextents + dicp->di_anextents, |
2294 | dicp->di_nblocks); | |
6d192a9b TS |
2295 | error = EFSCORRUPTED; |
2296 | goto error; | |
1da177e4 LT |
2297 | } |
2298 | if (unlikely(dicp->di_forkoff > mp->m_sb.sb_inodesize)) { | |
c9f71f5f | 2299 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(6)", |
1da177e4 LT |
2300 | XFS_ERRLEVEL_LOW, mp, dicp); |
2301 | xfs_buf_relse(bp); | |
2302 | xfs_fs_cmn_err(CE_ALERT, mp, | |
2303 | "xfs_inode_recover: Bad inode log rec ptr 0x%p, dino ptr 0x%p, dino bp 0x%p, ino %Ld, forkoff 0x%x", | |
c9f71f5f | 2304 | item, dip, bp, in_f->ilf_ino, dicp->di_forkoff); |
6d192a9b TS |
2305 | error = EFSCORRUPTED; |
2306 | goto error; | |
1da177e4 | 2307 | } |
81591fe2 | 2308 | if (unlikely(item->ri_buf[1].i_len > sizeof(struct xfs_icdinode))) { |
c9f71f5f | 2309 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(7)", |
1da177e4 LT |
2310 | XFS_ERRLEVEL_LOW, mp, dicp); |
2311 | xfs_buf_relse(bp); | |
2312 | xfs_fs_cmn_err(CE_ALERT, mp, | |
2313 | "xfs_inode_recover: Bad inode log record length %d, rec ptr 0x%p", | |
2314 | item->ri_buf[1].i_len, item); | |
6d192a9b TS |
2315 | error = EFSCORRUPTED; |
2316 | goto error; | |
1da177e4 LT |
2317 | } |
2318 | ||
2319 | /* The core is in in-core format */ | |
4e0d5f92 | 2320 | xfs_dinode_to_disk(dip, item->ri_buf[1].i_addr); |
1da177e4 LT |
2321 | |
2322 | /* the rest is in on-disk format */ | |
81591fe2 CH |
2323 | if (item->ri_buf[1].i_len > sizeof(struct xfs_icdinode)) { |
2324 | memcpy((xfs_caddr_t) dip + sizeof(struct xfs_icdinode), | |
2325 | item->ri_buf[1].i_addr + sizeof(struct xfs_icdinode), | |
2326 | item->ri_buf[1].i_len - sizeof(struct xfs_icdinode)); | |
1da177e4 LT |
2327 | } |
2328 | ||
2329 | fields = in_f->ilf_fields; | |
2330 | switch (fields & (XFS_ILOG_DEV | XFS_ILOG_UUID)) { | |
2331 | case XFS_ILOG_DEV: | |
81591fe2 | 2332 | xfs_dinode_put_rdev(dip, in_f->ilf_u.ilfu_rdev); |
1da177e4 LT |
2333 | break; |
2334 | case XFS_ILOG_UUID: | |
81591fe2 CH |
2335 | memcpy(XFS_DFORK_DPTR(dip), |
2336 | &in_f->ilf_u.ilfu_uuid, | |
2337 | sizeof(uuid_t)); | |
1da177e4 LT |
2338 | break; |
2339 | } | |
2340 | ||
2341 | if (in_f->ilf_size == 2) | |
2342 | goto write_inode_buffer; | |
2343 | len = item->ri_buf[2].i_len; | |
2344 | src = item->ri_buf[2].i_addr; | |
2345 | ASSERT(in_f->ilf_size <= 4); | |
2346 | ASSERT((in_f->ilf_size == 3) || (fields & XFS_ILOG_AFORK)); | |
2347 | ASSERT(!(fields & XFS_ILOG_DFORK) || | |
2348 | (len == in_f->ilf_dsize)); | |
2349 | ||
2350 | switch (fields & XFS_ILOG_DFORK) { | |
2351 | case XFS_ILOG_DDATA: | |
2352 | case XFS_ILOG_DEXT: | |
81591fe2 | 2353 | memcpy(XFS_DFORK_DPTR(dip), src, len); |
1da177e4 LT |
2354 | break; |
2355 | ||
2356 | case XFS_ILOG_DBROOT: | |
7cc95a82 | 2357 | xfs_bmbt_to_bmdr(mp, (struct xfs_btree_block *)src, len, |
81591fe2 | 2358 | (xfs_bmdr_block_t *)XFS_DFORK_DPTR(dip), |
1da177e4 LT |
2359 | XFS_DFORK_DSIZE(dip, mp)); |
2360 | break; | |
2361 | ||
2362 | default: | |
2363 | /* | |
2364 | * There are no data fork flags set. | |
2365 | */ | |
2366 | ASSERT((fields & XFS_ILOG_DFORK) == 0); | |
2367 | break; | |
2368 | } | |
2369 | ||
2370 | /* | |
2371 | * If we logged any attribute data, recover it. There may or | |
2372 | * may not have been any other non-core data logged in this | |
2373 | * transaction. | |
2374 | */ | |
2375 | if (in_f->ilf_fields & XFS_ILOG_AFORK) { | |
2376 | if (in_f->ilf_fields & XFS_ILOG_DFORK) { | |
2377 | attr_index = 3; | |
2378 | } else { | |
2379 | attr_index = 2; | |
2380 | } | |
2381 | len = item->ri_buf[attr_index].i_len; | |
2382 | src = item->ri_buf[attr_index].i_addr; | |
2383 | ASSERT(len == in_f->ilf_asize); | |
2384 | ||
2385 | switch (in_f->ilf_fields & XFS_ILOG_AFORK) { | |
2386 | case XFS_ILOG_ADATA: | |
2387 | case XFS_ILOG_AEXT: | |
2388 | dest = XFS_DFORK_APTR(dip); | |
2389 | ASSERT(len <= XFS_DFORK_ASIZE(dip, mp)); | |
2390 | memcpy(dest, src, len); | |
2391 | break; | |
2392 | ||
2393 | case XFS_ILOG_ABROOT: | |
2394 | dest = XFS_DFORK_APTR(dip); | |
7cc95a82 CH |
2395 | xfs_bmbt_to_bmdr(mp, (struct xfs_btree_block *)src, |
2396 | len, (xfs_bmdr_block_t*)dest, | |
1da177e4 LT |
2397 | XFS_DFORK_ASIZE(dip, mp)); |
2398 | break; | |
2399 | ||
2400 | default: | |
c9f71f5f | 2401 | xlog_warn("XFS: xlog_recover_inode_pass2: Invalid flag"); |
1da177e4 LT |
2402 | ASSERT(0); |
2403 | xfs_buf_relse(bp); | |
6d192a9b TS |
2404 | error = EIO; |
2405 | goto error; | |
1da177e4 LT |
2406 | } |
2407 | } | |
2408 | ||
2409 | write_inode_buffer: | |
ebad861b | 2410 | ASSERT(bp->b_target->bt_mount == mp); |
dd0bbad8 CH |
2411 | XFS_BUF_SET_IODONE_FUNC(bp, xlog_recover_iodone); |
2412 | xfs_bdwrite(mp, bp); | |
6d192a9b TS |
2413 | error: |
2414 | if (need_free) | |
f0e2d93c | 2415 | kmem_free(in_f); |
6d192a9b | 2416 | return XFS_ERROR(error); |
1da177e4 LT |
2417 | } |
2418 | ||
2419 | /* | |
2420 | * Recover QUOTAOFF records. We simply make a note of it in the xlog_t | |
2421 | * structure, so that we know not to do any dquot item or dquot buffer recovery, | |
2422 | * of that type. | |
2423 | */ | |
2424 | STATIC int | |
c9f71f5f | 2425 | xlog_recover_quotaoff_pass1( |
1da177e4 | 2426 | xlog_t *log, |
c9f71f5f | 2427 | xlog_recover_item_t *item) |
1da177e4 | 2428 | { |
c9f71f5f | 2429 | xfs_qoff_logformat_t *qoff_f = item->ri_buf[0].i_addr; |
1da177e4 LT |
2430 | ASSERT(qoff_f); |
2431 | ||
2432 | /* | |
2433 | * The logitem format's flag tells us if this was user quotaoff, | |
77a7cce4 | 2434 | * group/project quotaoff or both. |
1da177e4 LT |
2435 | */ |
2436 | if (qoff_f->qf_flags & XFS_UQUOTA_ACCT) | |
2437 | log->l_quotaoffs_flag |= XFS_DQ_USER; | |
77a7cce4 NS |
2438 | if (qoff_f->qf_flags & XFS_PQUOTA_ACCT) |
2439 | log->l_quotaoffs_flag |= XFS_DQ_PROJ; | |
1da177e4 LT |
2440 | if (qoff_f->qf_flags & XFS_GQUOTA_ACCT) |
2441 | log->l_quotaoffs_flag |= XFS_DQ_GROUP; | |
2442 | ||
2443 | return (0); | |
2444 | } | |
2445 | ||
2446 | /* | |
2447 | * Recover a dquot record | |
2448 | */ | |
2449 | STATIC int | |
c9f71f5f | 2450 | xlog_recover_dquot_pass2( |
1da177e4 | 2451 | xlog_t *log, |
c9f71f5f | 2452 | xlog_recover_item_t *item) |
1da177e4 | 2453 | { |
c9f71f5f | 2454 | xfs_mount_t *mp = log->l_mp; |
1da177e4 LT |
2455 | xfs_buf_t *bp; |
2456 | struct xfs_disk_dquot *ddq, *recddq; | |
2457 | int error; | |
2458 | xfs_dq_logformat_t *dq_f; | |
2459 | uint type; | |
2460 | ||
1da177e4 LT |
2461 | |
2462 | /* | |
2463 | * Filesystems are required to send in quota flags at mount time. | |
2464 | */ | |
2465 | if (mp->m_qflags == 0) | |
2466 | return (0); | |
2467 | ||
4e0d5f92 CH |
2468 | recddq = item->ri_buf[1].i_addr; |
2469 | if (recddq == NULL) { | |
0c5e1ce8 CH |
2470 | cmn_err(CE_ALERT, |
2471 | "XFS: NULL dquot in %s.", __func__); | |
2472 | return XFS_ERROR(EIO); | |
2473 | } | |
8ec6dba2 | 2474 | if (item->ri_buf[1].i_len < sizeof(xfs_disk_dquot_t)) { |
0c5e1ce8 CH |
2475 | cmn_err(CE_ALERT, |
2476 | "XFS: dquot too small (%d) in %s.", | |
2477 | item->ri_buf[1].i_len, __func__); | |
2478 | return XFS_ERROR(EIO); | |
2479 | } | |
2480 | ||
1da177e4 LT |
2481 | /* |
2482 | * This type of quotas was turned off, so ignore this record. | |
2483 | */ | |
b53e675d | 2484 | type = recddq->d_flags & (XFS_DQ_USER | XFS_DQ_PROJ | XFS_DQ_GROUP); |
1da177e4 LT |
2485 | ASSERT(type); |
2486 | if (log->l_quotaoffs_flag & type) | |
2487 | return (0); | |
2488 | ||
2489 | /* | |
2490 | * At this point we know that quota was _not_ turned off. | |
2491 | * Since the mount flags are not indicating to us otherwise, this | |
2492 | * must mean that quota is on, and the dquot needs to be replayed. | |
2493 | * Remember that we may not have fully recovered the superblock yet, | |
2494 | * so we can't do the usual trick of looking at the SB quota bits. | |
2495 | * | |
2496 | * The other possibility, of course, is that the quota subsystem was | |
2497 | * removed since the last mount - ENOSYS. | |
2498 | */ | |
4e0d5f92 | 2499 | dq_f = item->ri_buf[0].i_addr; |
1da177e4 LT |
2500 | ASSERT(dq_f); |
2501 | if ((error = xfs_qm_dqcheck(recddq, | |
2502 | dq_f->qlf_id, | |
2503 | 0, XFS_QMOPT_DOWARN, | |
c9f71f5f | 2504 | "xlog_recover_dquot_pass2 (log copy)"))) { |
1da177e4 LT |
2505 | return XFS_ERROR(EIO); |
2506 | } | |
2507 | ASSERT(dq_f->qlf_len == 1); | |
2508 | ||
2509 | error = xfs_read_buf(mp, mp->m_ddev_targp, | |
2510 | dq_f->qlf_blkno, | |
2511 | XFS_FSB_TO_BB(mp, dq_f->qlf_len), | |
2512 | 0, &bp); | |
2513 | if (error) { | |
2514 | xfs_ioerror_alert("xlog_recover_do..(read#3)", mp, | |
2515 | bp, dq_f->qlf_blkno); | |
2516 | return error; | |
2517 | } | |
2518 | ASSERT(bp); | |
2519 | ddq = (xfs_disk_dquot_t *)xfs_buf_offset(bp, dq_f->qlf_boffset); | |
2520 | ||
2521 | /* | |
2522 | * At least the magic num portion should be on disk because this | |
2523 | * was among a chunk of dquots created earlier, and we did some | |
2524 | * minimal initialization then. | |
2525 | */ | |
2526 | if (xfs_qm_dqcheck(ddq, dq_f->qlf_id, 0, XFS_QMOPT_DOWARN, | |
c9f71f5f | 2527 | "xlog_recover_dquot_pass2")) { |
1da177e4 LT |
2528 | xfs_buf_relse(bp); |
2529 | return XFS_ERROR(EIO); | |
2530 | } | |
2531 | ||
2532 | memcpy(ddq, recddq, item->ri_buf[1].i_len); | |
2533 | ||
2534 | ASSERT(dq_f->qlf_size == 2); | |
ebad861b | 2535 | ASSERT(bp->b_target->bt_mount == mp); |
1da177e4 LT |
2536 | XFS_BUF_SET_IODONE_FUNC(bp, xlog_recover_iodone); |
2537 | xfs_bdwrite(mp, bp); | |
2538 | ||
2539 | return (0); | |
2540 | } | |
2541 | ||
2542 | /* | |
2543 | * This routine is called to create an in-core extent free intent | |
2544 | * item from the efi format structure which was logged on disk. | |
2545 | * It allocates an in-core efi, copies the extents from the format | |
2546 | * structure into it, and adds the efi to the AIL with the given | |
2547 | * LSN. | |
2548 | */ | |
6d192a9b | 2549 | STATIC int |
c9f71f5f | 2550 | xlog_recover_efi_pass2( |
1da177e4 LT |
2551 | xlog_t *log, |
2552 | xlog_recover_item_t *item, | |
c9f71f5f | 2553 | xfs_lsn_t lsn) |
1da177e4 | 2554 | { |
6d192a9b | 2555 | int error; |
c9f71f5f | 2556 | xfs_mount_t *mp = log->l_mp; |
1da177e4 LT |
2557 | xfs_efi_log_item_t *efip; |
2558 | xfs_efi_log_format_t *efi_formatp; | |
1da177e4 | 2559 | |
4e0d5f92 | 2560 | efi_formatp = item->ri_buf[0].i_addr; |
1da177e4 | 2561 | |
1da177e4 | 2562 | efip = xfs_efi_init(mp, efi_formatp->efi_nextents); |
6d192a9b TS |
2563 | if ((error = xfs_efi_copy_format(&(item->ri_buf[0]), |
2564 | &(efip->efi_format)))) { | |
2565 | xfs_efi_item_free(efip); | |
2566 | return error; | |
2567 | } | |
b199c8a4 | 2568 | atomic_set(&efip->efi_next_extent, efi_formatp->efi_nextents); |
1da177e4 | 2569 | |
a9c21c1b | 2570 | spin_lock(&log->l_ailp->xa_lock); |
1da177e4 | 2571 | /* |
783a2f65 | 2572 | * xfs_trans_ail_update() drops the AIL lock. |
1da177e4 | 2573 | */ |
e6059949 | 2574 | xfs_trans_ail_update(log->l_ailp, &efip->efi_item, lsn); |
6d192a9b | 2575 | return 0; |
1da177e4 LT |
2576 | } |
2577 | ||
2578 | ||
2579 | /* | |
2580 | * This routine is called when an efd format structure is found in | |
2581 | * a committed transaction in the log. It's purpose is to cancel | |
2582 | * the corresponding efi if it was still in the log. To do this | |
2583 | * it searches the AIL for the efi with an id equal to that in the | |
2584 | * efd format structure. If we find it, we remove the efi from the | |
2585 | * AIL and free it. | |
2586 | */ | |
c9f71f5f CH |
2587 | STATIC int |
2588 | xlog_recover_efd_pass2( | |
1da177e4 | 2589 | xlog_t *log, |
c9f71f5f | 2590 | xlog_recover_item_t *item) |
1da177e4 | 2591 | { |
1da177e4 LT |
2592 | xfs_efd_log_format_t *efd_formatp; |
2593 | xfs_efi_log_item_t *efip = NULL; | |
2594 | xfs_log_item_t *lip; | |
1da177e4 | 2595 | __uint64_t efi_id; |
27d8d5fe | 2596 | struct xfs_ail_cursor cur; |
783a2f65 | 2597 | struct xfs_ail *ailp = log->l_ailp; |
1da177e4 | 2598 | |
4e0d5f92 | 2599 | efd_formatp = item->ri_buf[0].i_addr; |
6d192a9b TS |
2600 | ASSERT((item->ri_buf[0].i_len == (sizeof(xfs_efd_log_format_32_t) + |
2601 | ((efd_formatp->efd_nextents - 1) * sizeof(xfs_extent_32_t)))) || | |
2602 | (item->ri_buf[0].i_len == (sizeof(xfs_efd_log_format_64_t) + | |
2603 | ((efd_formatp->efd_nextents - 1) * sizeof(xfs_extent_64_t))))); | |
1da177e4 LT |
2604 | efi_id = efd_formatp->efd_efi_id; |
2605 | ||
2606 | /* | |
2607 | * Search for the efi with the id in the efd format structure | |
2608 | * in the AIL. | |
2609 | */ | |
a9c21c1b DC |
2610 | spin_lock(&ailp->xa_lock); |
2611 | lip = xfs_trans_ail_cursor_first(ailp, &cur, 0); | |
1da177e4 LT |
2612 | while (lip != NULL) { |
2613 | if (lip->li_type == XFS_LI_EFI) { | |
2614 | efip = (xfs_efi_log_item_t *)lip; | |
2615 | if (efip->efi_format.efi_id == efi_id) { | |
2616 | /* | |
783a2f65 | 2617 | * xfs_trans_ail_delete() drops the |
1da177e4 LT |
2618 | * AIL lock. |
2619 | */ | |
783a2f65 | 2620 | xfs_trans_ail_delete(ailp, lip); |
8ae2c0f6 | 2621 | xfs_efi_item_free(efip); |
a9c21c1b | 2622 | spin_lock(&ailp->xa_lock); |
27d8d5fe | 2623 | break; |
1da177e4 LT |
2624 | } |
2625 | } | |
a9c21c1b | 2626 | lip = xfs_trans_ail_cursor_next(ailp, &cur); |
1da177e4 | 2627 | } |
a9c21c1b DC |
2628 | xfs_trans_ail_cursor_done(ailp, &cur); |
2629 | spin_unlock(&ailp->xa_lock); | |
c9f71f5f CH |
2630 | |
2631 | return 0; | |
1da177e4 LT |
2632 | } |
2633 | ||
1da177e4 LT |
2634 | /* |
2635 | * Free up any resources allocated by the transaction | |
2636 | * | |
2637 | * Remember that EFIs, EFDs, and IUNLINKs are handled later. | |
2638 | */ | |
2639 | STATIC void | |
2640 | xlog_recover_free_trans( | |
d0450948 | 2641 | struct xlog_recover *trans) |
1da177e4 | 2642 | { |
f0a76953 | 2643 | xlog_recover_item_t *item, *n; |
1da177e4 LT |
2644 | int i; |
2645 | ||
f0a76953 DC |
2646 | list_for_each_entry_safe(item, n, &trans->r_itemq, ri_list) { |
2647 | /* Free the regions in the item. */ | |
2648 | list_del(&item->ri_list); | |
2649 | for (i = 0; i < item->ri_cnt; i++) | |
2650 | kmem_free(item->ri_buf[i].i_addr); | |
1da177e4 | 2651 | /* Free the item itself */ |
f0a76953 DC |
2652 | kmem_free(item->ri_buf); |
2653 | kmem_free(item); | |
2654 | } | |
1da177e4 | 2655 | /* Free the transaction recover structure */ |
f0e2d93c | 2656 | kmem_free(trans); |
1da177e4 LT |
2657 | } |
2658 | ||
d0450948 | 2659 | STATIC int |
c9f71f5f | 2660 | xlog_recover_commit_pass1( |
d0450948 CH |
2661 | struct log *log, |
2662 | struct xlog_recover *trans, | |
c9f71f5f | 2663 | xlog_recover_item_t *item) |
d0450948 | 2664 | { |
c9f71f5f | 2665 | trace_xfs_log_recover_item_recover(log, trans, item, XLOG_RECOVER_PASS1); |
d0450948 CH |
2666 | |
2667 | switch (ITEM_TYPE(item)) { | |
2668 | case XFS_LI_BUF: | |
c9f71f5f CH |
2669 | return xlog_recover_buffer_pass1(log, item); |
2670 | case XFS_LI_QUOTAOFF: | |
2671 | return xlog_recover_quotaoff_pass1(log, item); | |
d0450948 | 2672 | case XFS_LI_INODE: |
d0450948 | 2673 | case XFS_LI_EFI: |
d0450948 | 2674 | case XFS_LI_EFD: |
c9f71f5f CH |
2675 | case XFS_LI_DQUOT: |
2676 | /* nothing to do in pass 1 */ | |
d0450948 | 2677 | return 0; |
c9f71f5f CH |
2678 | default: |
2679 | xlog_warn( | |
2680 | "XFS: invalid item type (%d) xlog_recover_commit_pass1", | |
2681 | ITEM_TYPE(item)); | |
2682 | ASSERT(0); | |
2683 | return XFS_ERROR(EIO); | |
2684 | } | |
2685 | } | |
2686 | ||
2687 | STATIC int | |
2688 | xlog_recover_commit_pass2( | |
2689 | struct log *log, | |
2690 | struct xlog_recover *trans, | |
2691 | xlog_recover_item_t *item) | |
2692 | { | |
2693 | trace_xfs_log_recover_item_recover(log, trans, item, XLOG_RECOVER_PASS2); | |
2694 | ||
2695 | switch (ITEM_TYPE(item)) { | |
2696 | case XFS_LI_BUF: | |
2697 | return xlog_recover_buffer_pass2(log, item); | |
2698 | case XFS_LI_INODE: | |
2699 | return xlog_recover_inode_pass2(log, item); | |
2700 | case XFS_LI_EFI: | |
2701 | return xlog_recover_efi_pass2(log, item, trans->r_lsn); | |
2702 | case XFS_LI_EFD: | |
2703 | return xlog_recover_efd_pass2(log, item); | |
d0450948 | 2704 | case XFS_LI_DQUOT: |
c9f71f5f | 2705 | return xlog_recover_dquot_pass2(log, item); |
d0450948 | 2706 | case XFS_LI_QUOTAOFF: |
c9f71f5f CH |
2707 | /* nothing to do in pass2 */ |
2708 | return 0; | |
d0450948 CH |
2709 | default: |
2710 | xlog_warn( | |
c9f71f5f CH |
2711 | "XFS: invalid item type (%d) xlog_recover_commit_pass2", |
2712 | ITEM_TYPE(item)); | |
d0450948 CH |
2713 | ASSERT(0); |
2714 | return XFS_ERROR(EIO); | |
2715 | } | |
2716 | } | |
2717 | ||
2718 | /* | |
2719 | * Perform the transaction. | |
2720 | * | |
2721 | * If the transaction modifies a buffer or inode, do it now. Otherwise, | |
2722 | * EFIs and EFDs get queued up by adding entries into the AIL for them. | |
2723 | */ | |
1da177e4 LT |
2724 | STATIC int |
2725 | xlog_recover_commit_trans( | |
d0450948 CH |
2726 | struct log *log, |
2727 | struct xlog_recover *trans, | |
1da177e4 LT |
2728 | int pass) |
2729 | { | |
d0450948 CH |
2730 | int error = 0; |
2731 | xlog_recover_item_t *item; | |
1da177e4 | 2732 | |
f0a76953 | 2733 | hlist_del(&trans->r_list); |
d0450948 CH |
2734 | |
2735 | error = xlog_recover_reorder_trans(log, trans, pass); | |
2736 | if (error) | |
1da177e4 | 2737 | return error; |
d0450948 CH |
2738 | |
2739 | list_for_each_entry(item, &trans->r_itemq, ri_list) { | |
c9f71f5f CH |
2740 | if (pass == XLOG_RECOVER_PASS1) |
2741 | error = xlog_recover_commit_pass1(log, trans, item); | |
2742 | else | |
2743 | error = xlog_recover_commit_pass2(log, trans, item); | |
d0450948 CH |
2744 | if (error) |
2745 | return error; | |
2746 | } | |
2747 | ||
2748 | xlog_recover_free_trans(trans); | |
1da177e4 LT |
2749 | return 0; |
2750 | } | |
2751 | ||
2752 | STATIC int | |
2753 | xlog_recover_unmount_trans( | |
2754 | xlog_recover_t *trans) | |
2755 | { | |
2756 | /* Do nothing now */ | |
2757 | xlog_warn("XFS: xlog_recover_unmount_trans: Unmount LR"); | |
2758 | return 0; | |
2759 | } | |
2760 | ||
2761 | /* | |
2762 | * There are two valid states of the r_state field. 0 indicates that the | |
2763 | * transaction structure is in a normal state. We have either seen the | |
2764 | * start of the transaction or the last operation we added was not a partial | |
2765 | * operation. If the last operation we added to the transaction was a | |
2766 | * partial operation, we need to mark r_state with XLOG_WAS_CONT_TRANS. | |
2767 | * | |
2768 | * NOTE: skip LRs with 0 data length. | |
2769 | */ | |
2770 | STATIC int | |
2771 | xlog_recover_process_data( | |
2772 | xlog_t *log, | |
f0a76953 | 2773 | struct hlist_head rhash[], |
1da177e4 LT |
2774 | xlog_rec_header_t *rhead, |
2775 | xfs_caddr_t dp, | |
2776 | int pass) | |
2777 | { | |
2778 | xfs_caddr_t lp; | |
2779 | int num_logops; | |
2780 | xlog_op_header_t *ohead; | |
2781 | xlog_recover_t *trans; | |
2782 | xlog_tid_t tid; | |
2783 | int error; | |
2784 | unsigned long hash; | |
2785 | uint flags; | |
2786 | ||
b53e675d CH |
2787 | lp = dp + be32_to_cpu(rhead->h_len); |
2788 | num_logops = be32_to_cpu(rhead->h_num_logops); | |
1da177e4 LT |
2789 | |
2790 | /* check the log format matches our own - else we can't recover */ | |
2791 | if (xlog_header_check_recover(log->l_mp, rhead)) | |
2792 | return (XFS_ERROR(EIO)); | |
2793 | ||
2794 | while ((dp < lp) && num_logops) { | |
2795 | ASSERT(dp + sizeof(xlog_op_header_t) <= lp); | |
2796 | ohead = (xlog_op_header_t *)dp; | |
2797 | dp += sizeof(xlog_op_header_t); | |
2798 | if (ohead->oh_clientid != XFS_TRANSACTION && | |
2799 | ohead->oh_clientid != XFS_LOG) { | |
2800 | xlog_warn( | |
2801 | "XFS: xlog_recover_process_data: bad clientid"); | |
2802 | ASSERT(0); | |
2803 | return (XFS_ERROR(EIO)); | |
2804 | } | |
67fcb7bf | 2805 | tid = be32_to_cpu(ohead->oh_tid); |
1da177e4 | 2806 | hash = XLOG_RHASH(tid); |
f0a76953 | 2807 | trans = xlog_recover_find_tid(&rhash[hash], tid); |
1da177e4 LT |
2808 | if (trans == NULL) { /* not found; add new tid */ |
2809 | if (ohead->oh_flags & XLOG_START_TRANS) | |
2810 | xlog_recover_new_tid(&rhash[hash], tid, | |
b53e675d | 2811 | be64_to_cpu(rhead->h_lsn)); |
1da177e4 | 2812 | } else { |
9742bb93 LM |
2813 | if (dp + be32_to_cpu(ohead->oh_len) > lp) { |
2814 | xlog_warn( | |
2815 | "XFS: xlog_recover_process_data: bad length"); | |
2816 | WARN_ON(1); | |
2817 | return (XFS_ERROR(EIO)); | |
2818 | } | |
1da177e4 LT |
2819 | flags = ohead->oh_flags & ~XLOG_END_TRANS; |
2820 | if (flags & XLOG_WAS_CONT_TRANS) | |
2821 | flags &= ~XLOG_CONTINUE_TRANS; | |
2822 | switch (flags) { | |
2823 | case XLOG_COMMIT_TRANS: | |
2824 | error = xlog_recover_commit_trans(log, | |
f0a76953 | 2825 | trans, pass); |
1da177e4 LT |
2826 | break; |
2827 | case XLOG_UNMOUNT_TRANS: | |
2828 | error = xlog_recover_unmount_trans(trans); | |
2829 | break; | |
2830 | case XLOG_WAS_CONT_TRANS: | |
9abbc539 DC |
2831 | error = xlog_recover_add_to_cont_trans(log, |
2832 | trans, dp, | |
2833 | be32_to_cpu(ohead->oh_len)); | |
1da177e4 LT |
2834 | break; |
2835 | case XLOG_START_TRANS: | |
2836 | xlog_warn( | |
2837 | "XFS: xlog_recover_process_data: bad transaction"); | |
2838 | ASSERT(0); | |
2839 | error = XFS_ERROR(EIO); | |
2840 | break; | |
2841 | case 0: | |
2842 | case XLOG_CONTINUE_TRANS: | |
9abbc539 | 2843 | error = xlog_recover_add_to_trans(log, trans, |
67fcb7bf | 2844 | dp, be32_to_cpu(ohead->oh_len)); |
1da177e4 LT |
2845 | break; |
2846 | default: | |
2847 | xlog_warn( | |
2848 | "XFS: xlog_recover_process_data: bad flag"); | |
2849 | ASSERT(0); | |
2850 | error = XFS_ERROR(EIO); | |
2851 | break; | |
2852 | } | |
2853 | if (error) | |
2854 | return error; | |
2855 | } | |
67fcb7bf | 2856 | dp += be32_to_cpu(ohead->oh_len); |
1da177e4 LT |
2857 | num_logops--; |
2858 | } | |
2859 | return 0; | |
2860 | } | |
2861 | ||
2862 | /* | |
2863 | * Process an extent free intent item that was recovered from | |
2864 | * the log. We need to free the extents that it describes. | |
2865 | */ | |
3c1e2bbe | 2866 | STATIC int |
1da177e4 LT |
2867 | xlog_recover_process_efi( |
2868 | xfs_mount_t *mp, | |
2869 | xfs_efi_log_item_t *efip) | |
2870 | { | |
2871 | xfs_efd_log_item_t *efdp; | |
2872 | xfs_trans_t *tp; | |
2873 | int i; | |
3c1e2bbe | 2874 | int error = 0; |
1da177e4 LT |
2875 | xfs_extent_t *extp; |
2876 | xfs_fsblock_t startblock_fsb; | |
2877 | ||
b199c8a4 | 2878 | ASSERT(!test_bit(XFS_EFI_RECOVERED, &efip->efi_flags)); |
1da177e4 LT |
2879 | |
2880 | /* | |
2881 | * First check the validity of the extents described by the | |
2882 | * EFI. If any are bad, then assume that all are bad and | |
2883 | * just toss the EFI. | |
2884 | */ | |
2885 | for (i = 0; i < efip->efi_format.efi_nextents; i++) { | |
2886 | extp = &(efip->efi_format.efi_extents[i]); | |
2887 | startblock_fsb = XFS_BB_TO_FSB(mp, | |
2888 | XFS_FSB_TO_DADDR(mp, extp->ext_start)); | |
2889 | if ((startblock_fsb == 0) || | |
2890 | (extp->ext_len == 0) || | |
2891 | (startblock_fsb >= mp->m_sb.sb_dblocks) || | |
2892 | (extp->ext_len >= mp->m_sb.sb_agblocks)) { | |
2893 | /* | |
2894 | * This will pull the EFI from the AIL and | |
2895 | * free the memory associated with it. | |
2896 | */ | |
2897 | xfs_efi_release(efip, efip->efi_format.efi_nextents); | |
3c1e2bbe | 2898 | return XFS_ERROR(EIO); |
1da177e4 LT |
2899 | } |
2900 | } | |
2901 | ||
2902 | tp = xfs_trans_alloc(mp, 0); | |
3c1e2bbe | 2903 | error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, 0, 0); |
fc6149d8 DC |
2904 | if (error) |
2905 | goto abort_error; | |
1da177e4 LT |
2906 | efdp = xfs_trans_get_efd(tp, efip, efip->efi_format.efi_nextents); |
2907 | ||
2908 | for (i = 0; i < efip->efi_format.efi_nextents; i++) { | |
2909 | extp = &(efip->efi_format.efi_extents[i]); | |
fc6149d8 DC |
2910 | error = xfs_free_extent(tp, extp->ext_start, extp->ext_len); |
2911 | if (error) | |
2912 | goto abort_error; | |
1da177e4 LT |
2913 | xfs_trans_log_efd_extent(tp, efdp, extp->ext_start, |
2914 | extp->ext_len); | |
2915 | } | |
2916 | ||
b199c8a4 | 2917 | set_bit(XFS_EFI_RECOVERED, &efip->efi_flags); |
e5720eec | 2918 | error = xfs_trans_commit(tp, 0); |
3c1e2bbe | 2919 | return error; |
fc6149d8 DC |
2920 | |
2921 | abort_error: | |
2922 | xfs_trans_cancel(tp, XFS_TRANS_ABORT); | |
2923 | return error; | |
1da177e4 LT |
2924 | } |
2925 | ||
1da177e4 LT |
2926 | /* |
2927 | * When this is called, all of the EFIs which did not have | |
2928 | * corresponding EFDs should be in the AIL. What we do now | |
2929 | * is free the extents associated with each one. | |
2930 | * | |
2931 | * Since we process the EFIs in normal transactions, they | |
2932 | * will be removed at some point after the commit. This prevents | |
2933 | * us from just walking down the list processing each one. | |
2934 | * We'll use a flag in the EFI to skip those that we've already | |
2935 | * processed and use the AIL iteration mechanism's generation | |
2936 | * count to try to speed this up at least a bit. | |
2937 | * | |
2938 | * When we start, we know that the EFIs are the only things in | |
2939 | * the AIL. As we process them, however, other items are added | |
2940 | * to the AIL. Since everything added to the AIL must come after | |
2941 | * everything already in the AIL, we stop processing as soon as | |
2942 | * we see something other than an EFI in the AIL. | |
2943 | */ | |
3c1e2bbe | 2944 | STATIC int |
1da177e4 LT |
2945 | xlog_recover_process_efis( |
2946 | xlog_t *log) | |
2947 | { | |
2948 | xfs_log_item_t *lip; | |
2949 | xfs_efi_log_item_t *efip; | |
3c1e2bbe | 2950 | int error = 0; |
27d8d5fe | 2951 | struct xfs_ail_cursor cur; |
a9c21c1b | 2952 | struct xfs_ail *ailp; |
1da177e4 | 2953 | |
a9c21c1b DC |
2954 | ailp = log->l_ailp; |
2955 | spin_lock(&ailp->xa_lock); | |
2956 | lip = xfs_trans_ail_cursor_first(ailp, &cur, 0); | |
1da177e4 LT |
2957 | while (lip != NULL) { |
2958 | /* | |
2959 | * We're done when we see something other than an EFI. | |
27d8d5fe | 2960 | * There should be no EFIs left in the AIL now. |
1da177e4 LT |
2961 | */ |
2962 | if (lip->li_type != XFS_LI_EFI) { | |
27d8d5fe | 2963 | #ifdef DEBUG |
a9c21c1b | 2964 | for (; lip; lip = xfs_trans_ail_cursor_next(ailp, &cur)) |
27d8d5fe DC |
2965 | ASSERT(lip->li_type != XFS_LI_EFI); |
2966 | #endif | |
1da177e4 LT |
2967 | break; |
2968 | } | |
2969 | ||
2970 | /* | |
2971 | * Skip EFIs that we've already processed. | |
2972 | */ | |
2973 | efip = (xfs_efi_log_item_t *)lip; | |
b199c8a4 | 2974 | if (test_bit(XFS_EFI_RECOVERED, &efip->efi_flags)) { |
a9c21c1b | 2975 | lip = xfs_trans_ail_cursor_next(ailp, &cur); |
1da177e4 LT |
2976 | continue; |
2977 | } | |
2978 | ||
a9c21c1b DC |
2979 | spin_unlock(&ailp->xa_lock); |
2980 | error = xlog_recover_process_efi(log->l_mp, efip); | |
2981 | spin_lock(&ailp->xa_lock); | |
27d8d5fe DC |
2982 | if (error) |
2983 | goto out; | |
a9c21c1b | 2984 | lip = xfs_trans_ail_cursor_next(ailp, &cur); |
1da177e4 | 2985 | } |
27d8d5fe | 2986 | out: |
a9c21c1b DC |
2987 | xfs_trans_ail_cursor_done(ailp, &cur); |
2988 | spin_unlock(&ailp->xa_lock); | |
3c1e2bbe | 2989 | return error; |
1da177e4 LT |
2990 | } |
2991 | ||
2992 | /* | |
2993 | * This routine performs a transaction to null out a bad inode pointer | |
2994 | * in an agi unlinked inode hash bucket. | |
2995 | */ | |
2996 | STATIC void | |
2997 | xlog_recover_clear_agi_bucket( | |
2998 | xfs_mount_t *mp, | |
2999 | xfs_agnumber_t agno, | |
3000 | int bucket) | |
3001 | { | |
3002 | xfs_trans_t *tp; | |
3003 | xfs_agi_t *agi; | |
3004 | xfs_buf_t *agibp; | |
3005 | int offset; | |
3006 | int error; | |
3007 | ||
3008 | tp = xfs_trans_alloc(mp, XFS_TRANS_CLEAR_AGI_BUCKET); | |
5e1be0fb CH |
3009 | error = xfs_trans_reserve(tp, 0, XFS_CLEAR_AGI_BUCKET_LOG_RES(mp), |
3010 | 0, 0, 0); | |
e5720eec DC |
3011 | if (error) |
3012 | goto out_abort; | |
1da177e4 | 3013 | |
5e1be0fb CH |
3014 | error = xfs_read_agi(mp, tp, agno, &agibp); |
3015 | if (error) | |
e5720eec | 3016 | goto out_abort; |
1da177e4 | 3017 | |
5e1be0fb | 3018 | agi = XFS_BUF_TO_AGI(agibp); |
16259e7d | 3019 | agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO); |
1da177e4 LT |
3020 | offset = offsetof(xfs_agi_t, agi_unlinked) + |
3021 | (sizeof(xfs_agino_t) * bucket); | |
3022 | xfs_trans_log_buf(tp, agibp, offset, | |
3023 | (offset + sizeof(xfs_agino_t) - 1)); | |
3024 | ||
e5720eec DC |
3025 | error = xfs_trans_commit(tp, 0); |
3026 | if (error) | |
3027 | goto out_error; | |
3028 | return; | |
3029 | ||
3030 | out_abort: | |
3031 | xfs_trans_cancel(tp, XFS_TRANS_ABORT); | |
3032 | out_error: | |
3033 | xfs_fs_cmn_err(CE_WARN, mp, "xlog_recover_clear_agi_bucket: " | |
3034 | "failed to clear agi %d. Continuing.", agno); | |
3035 | return; | |
1da177e4 LT |
3036 | } |
3037 | ||
23fac50f CH |
3038 | STATIC xfs_agino_t |
3039 | xlog_recover_process_one_iunlink( | |
3040 | struct xfs_mount *mp, | |
3041 | xfs_agnumber_t agno, | |
3042 | xfs_agino_t agino, | |
3043 | int bucket) | |
3044 | { | |
3045 | struct xfs_buf *ibp; | |
3046 | struct xfs_dinode *dip; | |
3047 | struct xfs_inode *ip; | |
3048 | xfs_ino_t ino; | |
3049 | int error; | |
3050 | ||
3051 | ino = XFS_AGINO_TO_INO(mp, agno, agino); | |
7b6259e7 | 3052 | error = xfs_iget(mp, NULL, ino, 0, 0, &ip); |
23fac50f CH |
3053 | if (error) |
3054 | goto fail; | |
3055 | ||
3056 | /* | |
3057 | * Get the on disk inode to find the next inode in the bucket. | |
3058 | */ | |
0cadda1c | 3059 | error = xfs_itobp(mp, NULL, ip, &dip, &ibp, XBF_LOCK); |
23fac50f | 3060 | if (error) |
0e446673 | 3061 | goto fail_iput; |
23fac50f | 3062 | |
23fac50f | 3063 | ASSERT(ip->i_d.di_nlink == 0); |
0e446673 | 3064 | ASSERT(ip->i_d.di_mode != 0); |
23fac50f CH |
3065 | |
3066 | /* setup for the next pass */ | |
3067 | agino = be32_to_cpu(dip->di_next_unlinked); | |
3068 | xfs_buf_relse(ibp); | |
3069 | ||
3070 | /* | |
3071 | * Prevent any DMAPI event from being sent when the reference on | |
3072 | * the inode is dropped. | |
3073 | */ | |
3074 | ip->i_d.di_dmevmask = 0; | |
3075 | ||
0e446673 | 3076 | IRELE(ip); |
23fac50f CH |
3077 | return agino; |
3078 | ||
0e446673 CH |
3079 | fail_iput: |
3080 | IRELE(ip); | |
23fac50f CH |
3081 | fail: |
3082 | /* | |
3083 | * We can't read in the inode this bucket points to, or this inode | |
3084 | * is messed up. Just ditch this bucket of inodes. We will lose | |
3085 | * some inodes and space, but at least we won't hang. | |
3086 | * | |
3087 | * Call xlog_recover_clear_agi_bucket() to perform a transaction to | |
3088 | * clear the inode pointer in the bucket. | |
3089 | */ | |
3090 | xlog_recover_clear_agi_bucket(mp, agno, bucket); | |
3091 | return NULLAGINO; | |
3092 | } | |
3093 | ||
1da177e4 LT |
3094 | /* |
3095 | * xlog_iunlink_recover | |
3096 | * | |
3097 | * This is called during recovery to process any inodes which | |
3098 | * we unlinked but not freed when the system crashed. These | |
3099 | * inodes will be on the lists in the AGI blocks. What we do | |
3100 | * here is scan all the AGIs and fully truncate and free any | |
3101 | * inodes found on the lists. Each inode is removed from the | |
3102 | * lists when it has been fully truncated and is freed. The | |
3103 | * freeing of the inode and its removal from the list must be | |
3104 | * atomic. | |
3105 | */ | |
d96f8f89 | 3106 | STATIC void |
1da177e4 LT |
3107 | xlog_recover_process_iunlinks( |
3108 | xlog_t *log) | |
3109 | { | |
3110 | xfs_mount_t *mp; | |
3111 | xfs_agnumber_t agno; | |
3112 | xfs_agi_t *agi; | |
3113 | xfs_buf_t *agibp; | |
1da177e4 | 3114 | xfs_agino_t agino; |
1da177e4 LT |
3115 | int bucket; |
3116 | int error; | |
3117 | uint mp_dmevmask; | |
3118 | ||
3119 | mp = log->l_mp; | |
3120 | ||
3121 | /* | |
3122 | * Prevent any DMAPI event from being sent while in this function. | |
3123 | */ | |
3124 | mp_dmevmask = mp->m_dmevmask; | |
3125 | mp->m_dmevmask = 0; | |
3126 | ||
3127 | for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) { | |
3128 | /* | |
3129 | * Find the agi for this ag. | |
3130 | */ | |
5e1be0fb CH |
3131 | error = xfs_read_agi(mp, NULL, agno, &agibp); |
3132 | if (error) { | |
3133 | /* | |
3134 | * AGI is b0rked. Don't process it. | |
3135 | * | |
3136 | * We should probably mark the filesystem as corrupt | |
3137 | * after we've recovered all the ag's we can.... | |
3138 | */ | |
3139 | continue; | |
1da177e4 LT |
3140 | } |
3141 | agi = XFS_BUF_TO_AGI(agibp); | |
1da177e4 LT |
3142 | |
3143 | for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++) { | |
16259e7d | 3144 | agino = be32_to_cpu(agi->agi_unlinked[bucket]); |
1da177e4 | 3145 | while (agino != NULLAGINO) { |
1da177e4 LT |
3146 | /* |
3147 | * Release the agi buffer so that it can | |
3148 | * be acquired in the normal course of the | |
3149 | * transaction to truncate and free the inode. | |
3150 | */ | |
3151 | xfs_buf_relse(agibp); | |
3152 | ||
23fac50f CH |
3153 | agino = xlog_recover_process_one_iunlink(mp, |
3154 | agno, agino, bucket); | |
1da177e4 LT |
3155 | |
3156 | /* | |
3157 | * Reacquire the agibuffer and continue around | |
5e1be0fb CH |
3158 | * the loop. This should never fail as we know |
3159 | * the buffer was good earlier on. | |
1da177e4 | 3160 | */ |
5e1be0fb CH |
3161 | error = xfs_read_agi(mp, NULL, agno, &agibp); |
3162 | ASSERT(error == 0); | |
1da177e4 | 3163 | agi = XFS_BUF_TO_AGI(agibp); |
1da177e4 LT |
3164 | } |
3165 | } | |
3166 | ||
3167 | /* | |
3168 | * Release the buffer for the current agi so we can | |
3169 | * go on to the next one. | |
3170 | */ | |
3171 | xfs_buf_relse(agibp); | |
3172 | } | |
3173 | ||
3174 | mp->m_dmevmask = mp_dmevmask; | |
3175 | } | |
3176 | ||
3177 | ||
3178 | #ifdef DEBUG | |
3179 | STATIC void | |
3180 | xlog_pack_data_checksum( | |
3181 | xlog_t *log, | |
3182 | xlog_in_core_t *iclog, | |
3183 | int size) | |
3184 | { | |
3185 | int i; | |
b53e675d | 3186 | __be32 *up; |
1da177e4 LT |
3187 | uint chksum = 0; |
3188 | ||
b53e675d | 3189 | up = (__be32 *)iclog->ic_datap; |
1da177e4 LT |
3190 | /* divide length by 4 to get # words */ |
3191 | for (i = 0; i < (size >> 2); i++) { | |
b53e675d | 3192 | chksum ^= be32_to_cpu(*up); |
1da177e4 LT |
3193 | up++; |
3194 | } | |
b53e675d | 3195 | iclog->ic_header.h_chksum = cpu_to_be32(chksum); |
1da177e4 LT |
3196 | } |
3197 | #else | |
3198 | #define xlog_pack_data_checksum(log, iclog, size) | |
3199 | #endif | |
3200 | ||
3201 | /* | |
3202 | * Stamp cycle number in every block | |
3203 | */ | |
3204 | void | |
3205 | xlog_pack_data( | |
3206 | xlog_t *log, | |
3207 | xlog_in_core_t *iclog, | |
3208 | int roundoff) | |
3209 | { | |
3210 | int i, j, k; | |
3211 | int size = iclog->ic_offset + roundoff; | |
b53e675d | 3212 | __be32 cycle_lsn; |
1da177e4 | 3213 | xfs_caddr_t dp; |
1da177e4 LT |
3214 | |
3215 | xlog_pack_data_checksum(log, iclog, size); | |
3216 | ||
3217 | cycle_lsn = CYCLE_LSN_DISK(iclog->ic_header.h_lsn); | |
3218 | ||
3219 | dp = iclog->ic_datap; | |
3220 | for (i = 0; i < BTOBB(size) && | |
3221 | i < (XLOG_HEADER_CYCLE_SIZE / BBSIZE); i++) { | |
b53e675d CH |
3222 | iclog->ic_header.h_cycle_data[i] = *(__be32 *)dp; |
3223 | *(__be32 *)dp = cycle_lsn; | |
1da177e4 LT |
3224 | dp += BBSIZE; |
3225 | } | |
3226 | ||
62118709 | 3227 | if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { |
b28708d6 CH |
3228 | xlog_in_core_2_t *xhdr = iclog->ic_data; |
3229 | ||
1da177e4 LT |
3230 | for ( ; i < BTOBB(size); i++) { |
3231 | j = i / (XLOG_HEADER_CYCLE_SIZE / BBSIZE); | |
3232 | k = i % (XLOG_HEADER_CYCLE_SIZE / BBSIZE); | |
b53e675d CH |
3233 | xhdr[j].hic_xheader.xh_cycle_data[k] = *(__be32 *)dp; |
3234 | *(__be32 *)dp = cycle_lsn; | |
1da177e4 LT |
3235 | dp += BBSIZE; |
3236 | } | |
3237 | ||
3238 | for (i = 1; i < log->l_iclog_heads; i++) { | |
3239 | xhdr[i].hic_xheader.xh_cycle = cycle_lsn; | |
3240 | } | |
3241 | } | |
3242 | } | |
3243 | ||
1da177e4 LT |
3244 | STATIC void |
3245 | xlog_unpack_data( | |
3246 | xlog_rec_header_t *rhead, | |
3247 | xfs_caddr_t dp, | |
3248 | xlog_t *log) | |
3249 | { | |
3250 | int i, j, k; | |
1da177e4 | 3251 | |
b53e675d | 3252 | for (i = 0; i < BTOBB(be32_to_cpu(rhead->h_len)) && |
1da177e4 | 3253 | i < (XLOG_HEADER_CYCLE_SIZE / BBSIZE); i++) { |
b53e675d | 3254 | *(__be32 *)dp = *(__be32 *)&rhead->h_cycle_data[i]; |
1da177e4 LT |
3255 | dp += BBSIZE; |
3256 | } | |
3257 | ||
62118709 | 3258 | if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { |
b28708d6 | 3259 | xlog_in_core_2_t *xhdr = (xlog_in_core_2_t *)rhead; |
b53e675d | 3260 | for ( ; i < BTOBB(be32_to_cpu(rhead->h_len)); i++) { |
1da177e4 LT |
3261 | j = i / (XLOG_HEADER_CYCLE_SIZE / BBSIZE); |
3262 | k = i % (XLOG_HEADER_CYCLE_SIZE / BBSIZE); | |
b53e675d | 3263 | *(__be32 *)dp = xhdr[j].hic_xheader.xh_cycle_data[k]; |
1da177e4 LT |
3264 | dp += BBSIZE; |
3265 | } | |
3266 | } | |
1da177e4 LT |
3267 | } |
3268 | ||
3269 | STATIC int | |
3270 | xlog_valid_rec_header( | |
3271 | xlog_t *log, | |
3272 | xlog_rec_header_t *rhead, | |
3273 | xfs_daddr_t blkno) | |
3274 | { | |
3275 | int hlen; | |
3276 | ||
b53e675d | 3277 | if (unlikely(be32_to_cpu(rhead->h_magicno) != XLOG_HEADER_MAGIC_NUM)) { |
1da177e4 LT |
3278 | XFS_ERROR_REPORT("xlog_valid_rec_header(1)", |
3279 | XFS_ERRLEVEL_LOW, log->l_mp); | |
3280 | return XFS_ERROR(EFSCORRUPTED); | |
3281 | } | |
3282 | if (unlikely( | |
3283 | (!rhead->h_version || | |
b53e675d | 3284 | (be32_to_cpu(rhead->h_version) & (~XLOG_VERSION_OKBITS))))) { |
1da177e4 | 3285 | xlog_warn("XFS: %s: unrecognised log version (%d).", |
34a622b2 | 3286 | __func__, be32_to_cpu(rhead->h_version)); |
1da177e4 LT |
3287 | return XFS_ERROR(EIO); |
3288 | } | |
3289 | ||
3290 | /* LR body must have data or it wouldn't have been written */ | |
b53e675d | 3291 | hlen = be32_to_cpu(rhead->h_len); |
1da177e4 LT |
3292 | if (unlikely( hlen <= 0 || hlen > INT_MAX )) { |
3293 | XFS_ERROR_REPORT("xlog_valid_rec_header(2)", | |
3294 | XFS_ERRLEVEL_LOW, log->l_mp); | |
3295 | return XFS_ERROR(EFSCORRUPTED); | |
3296 | } | |
3297 | if (unlikely( blkno > log->l_logBBsize || blkno > INT_MAX )) { | |
3298 | XFS_ERROR_REPORT("xlog_valid_rec_header(3)", | |
3299 | XFS_ERRLEVEL_LOW, log->l_mp); | |
3300 | return XFS_ERROR(EFSCORRUPTED); | |
3301 | } | |
3302 | return 0; | |
3303 | } | |
3304 | ||
3305 | /* | |
3306 | * Read the log from tail to head and process the log records found. | |
3307 | * Handle the two cases where the tail and head are in the same cycle | |
3308 | * and where the active portion of the log wraps around the end of | |
3309 | * the physical log separately. The pass parameter is passed through | |
3310 | * to the routines called to process the data and is not looked at | |
3311 | * here. | |
3312 | */ | |
3313 | STATIC int | |
3314 | xlog_do_recovery_pass( | |
3315 | xlog_t *log, | |
3316 | xfs_daddr_t head_blk, | |
3317 | xfs_daddr_t tail_blk, | |
3318 | int pass) | |
3319 | { | |
3320 | xlog_rec_header_t *rhead; | |
3321 | xfs_daddr_t blk_no; | |
fc5bc4c8 | 3322 | xfs_caddr_t offset; |
1da177e4 LT |
3323 | xfs_buf_t *hbp, *dbp; |
3324 | int error = 0, h_size; | |
3325 | int bblks, split_bblks; | |
3326 | int hblks, split_hblks, wrapped_hblks; | |
f0a76953 | 3327 | struct hlist_head rhash[XLOG_RHASH_SIZE]; |
1da177e4 LT |
3328 | |
3329 | ASSERT(head_blk != tail_blk); | |
3330 | ||
3331 | /* | |
3332 | * Read the header of the tail block and get the iclog buffer size from | |
3333 | * h_size. Use this to tell how many sectors make up the log header. | |
3334 | */ | |
62118709 | 3335 | if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { |
1da177e4 LT |
3336 | /* |
3337 | * When using variable length iclogs, read first sector of | |
3338 | * iclog header and extract the header size from it. Get a | |
3339 | * new hbp that is the correct size. | |
3340 | */ | |
3341 | hbp = xlog_get_bp(log, 1); | |
3342 | if (!hbp) | |
3343 | return ENOMEM; | |
076e6acb CH |
3344 | |
3345 | error = xlog_bread(log, tail_blk, 1, hbp, &offset); | |
3346 | if (error) | |
1da177e4 | 3347 | goto bread_err1; |
076e6acb | 3348 | |
1da177e4 LT |
3349 | rhead = (xlog_rec_header_t *)offset; |
3350 | error = xlog_valid_rec_header(log, rhead, tail_blk); | |
3351 | if (error) | |
3352 | goto bread_err1; | |
b53e675d CH |
3353 | h_size = be32_to_cpu(rhead->h_size); |
3354 | if ((be32_to_cpu(rhead->h_version) & XLOG_VERSION_2) && | |
1da177e4 LT |
3355 | (h_size > XLOG_HEADER_CYCLE_SIZE)) { |
3356 | hblks = h_size / XLOG_HEADER_CYCLE_SIZE; | |
3357 | if (h_size % XLOG_HEADER_CYCLE_SIZE) | |
3358 | hblks++; | |
3359 | xlog_put_bp(hbp); | |
3360 | hbp = xlog_get_bp(log, hblks); | |
3361 | } else { | |
3362 | hblks = 1; | |
3363 | } | |
3364 | } else { | |
69ce58f0 | 3365 | ASSERT(log->l_sectBBsize == 1); |
1da177e4 LT |
3366 | hblks = 1; |
3367 | hbp = xlog_get_bp(log, 1); | |
3368 | h_size = XLOG_BIG_RECORD_BSIZE; | |
3369 | } | |
3370 | ||
3371 | if (!hbp) | |
3372 | return ENOMEM; | |
3373 | dbp = xlog_get_bp(log, BTOBB(h_size)); | |
3374 | if (!dbp) { | |
3375 | xlog_put_bp(hbp); | |
3376 | return ENOMEM; | |
3377 | } | |
3378 | ||
3379 | memset(rhash, 0, sizeof(rhash)); | |
3380 | if (tail_blk <= head_blk) { | |
3381 | for (blk_no = tail_blk; blk_no < head_blk; ) { | |
076e6acb CH |
3382 | error = xlog_bread(log, blk_no, hblks, hbp, &offset); |
3383 | if (error) | |
1da177e4 | 3384 | goto bread_err2; |
076e6acb | 3385 | |
1da177e4 LT |
3386 | rhead = (xlog_rec_header_t *)offset; |
3387 | error = xlog_valid_rec_header(log, rhead, blk_no); | |
3388 | if (error) | |
3389 | goto bread_err2; | |
3390 | ||
3391 | /* blocks in data section */ | |
b53e675d | 3392 | bblks = (int)BTOBB(be32_to_cpu(rhead->h_len)); |
076e6acb CH |
3393 | error = xlog_bread(log, blk_no + hblks, bblks, dbp, |
3394 | &offset); | |
1da177e4 LT |
3395 | if (error) |
3396 | goto bread_err2; | |
076e6acb | 3397 | |
1da177e4 LT |
3398 | xlog_unpack_data(rhead, offset, log); |
3399 | if ((error = xlog_recover_process_data(log, | |
3400 | rhash, rhead, offset, pass))) | |
3401 | goto bread_err2; | |
3402 | blk_no += bblks + hblks; | |
3403 | } | |
3404 | } else { | |
3405 | /* | |
3406 | * Perform recovery around the end of the physical log. | |
3407 | * When the head is not on the same cycle number as the tail, | |
3408 | * we can't do a sequential recovery as above. | |
3409 | */ | |
3410 | blk_no = tail_blk; | |
3411 | while (blk_no < log->l_logBBsize) { | |
3412 | /* | |
3413 | * Check for header wrapping around physical end-of-log | |
3414 | */ | |
fc5bc4c8 | 3415 | offset = XFS_BUF_PTR(hbp); |
1da177e4 LT |
3416 | split_hblks = 0; |
3417 | wrapped_hblks = 0; | |
3418 | if (blk_no + hblks <= log->l_logBBsize) { | |
3419 | /* Read header in one read */ | |
076e6acb CH |
3420 | error = xlog_bread(log, blk_no, hblks, hbp, |
3421 | &offset); | |
1da177e4 LT |
3422 | if (error) |
3423 | goto bread_err2; | |
1da177e4 LT |
3424 | } else { |
3425 | /* This LR is split across physical log end */ | |
3426 | if (blk_no != log->l_logBBsize) { | |
3427 | /* some data before physical log end */ | |
3428 | ASSERT(blk_no <= INT_MAX); | |
3429 | split_hblks = log->l_logBBsize - (int)blk_no; | |
3430 | ASSERT(split_hblks > 0); | |
076e6acb CH |
3431 | error = xlog_bread(log, blk_no, |
3432 | split_hblks, hbp, | |
3433 | &offset); | |
3434 | if (error) | |
1da177e4 | 3435 | goto bread_err2; |
1da177e4 | 3436 | } |
076e6acb | 3437 | |
1da177e4 LT |
3438 | /* |
3439 | * Note: this black magic still works with | |
3440 | * large sector sizes (non-512) only because: | |
3441 | * - we increased the buffer size originally | |
3442 | * by 1 sector giving us enough extra space | |
3443 | * for the second read; | |
3444 | * - the log start is guaranteed to be sector | |
3445 | * aligned; | |
3446 | * - we read the log end (LR header start) | |
3447 | * _first_, then the log start (LR header end) | |
3448 | * - order is important. | |
3449 | */ | |
234f56ac | 3450 | wrapped_hblks = hblks - split_hblks; |
234f56ac | 3451 | error = XFS_BUF_SET_PTR(hbp, |
fc5bc4c8 | 3452 | offset + BBTOB(split_hblks), |
1da177e4 | 3453 | BBTOB(hblks - split_hblks)); |
076e6acb CH |
3454 | if (error) |
3455 | goto bread_err2; | |
3456 | ||
3457 | error = xlog_bread_noalign(log, 0, | |
3458 | wrapped_hblks, hbp); | |
3459 | if (error) | |
3460 | goto bread_err2; | |
3461 | ||
fc5bc4c8 | 3462 | error = XFS_BUF_SET_PTR(hbp, offset, |
234f56ac | 3463 | BBTOB(hblks)); |
1da177e4 LT |
3464 | if (error) |
3465 | goto bread_err2; | |
1da177e4 LT |
3466 | } |
3467 | rhead = (xlog_rec_header_t *)offset; | |
3468 | error = xlog_valid_rec_header(log, rhead, | |
3469 | split_hblks ? blk_no : 0); | |
3470 | if (error) | |
3471 | goto bread_err2; | |
3472 | ||
b53e675d | 3473 | bblks = (int)BTOBB(be32_to_cpu(rhead->h_len)); |
1da177e4 LT |
3474 | blk_no += hblks; |
3475 | ||
3476 | /* Read in data for log record */ | |
3477 | if (blk_no + bblks <= log->l_logBBsize) { | |
076e6acb CH |
3478 | error = xlog_bread(log, blk_no, bblks, dbp, |
3479 | &offset); | |
1da177e4 LT |
3480 | if (error) |
3481 | goto bread_err2; | |
1da177e4 LT |
3482 | } else { |
3483 | /* This log record is split across the | |
3484 | * physical end of log */ | |
fc5bc4c8 | 3485 | offset = XFS_BUF_PTR(dbp); |
1da177e4 LT |
3486 | split_bblks = 0; |
3487 | if (blk_no != log->l_logBBsize) { | |
3488 | /* some data is before the physical | |
3489 | * end of log */ | |
3490 | ASSERT(!wrapped_hblks); | |
3491 | ASSERT(blk_no <= INT_MAX); | |
3492 | split_bblks = | |
3493 | log->l_logBBsize - (int)blk_no; | |
3494 | ASSERT(split_bblks > 0); | |
076e6acb CH |
3495 | error = xlog_bread(log, blk_no, |
3496 | split_bblks, dbp, | |
3497 | &offset); | |
3498 | if (error) | |
1da177e4 | 3499 | goto bread_err2; |
1da177e4 | 3500 | } |
076e6acb | 3501 | |
1da177e4 LT |
3502 | /* |
3503 | * Note: this black magic still works with | |
3504 | * large sector sizes (non-512) only because: | |
3505 | * - we increased the buffer size originally | |
3506 | * by 1 sector giving us enough extra space | |
3507 | * for the second read; | |
3508 | * - the log start is guaranteed to be sector | |
3509 | * aligned; | |
3510 | * - we read the log end (LR header start) | |
3511 | * _first_, then the log start (LR header end) | |
3512 | * - order is important. | |
3513 | */ | |
234f56ac | 3514 | error = XFS_BUF_SET_PTR(dbp, |
fc5bc4c8 | 3515 | offset + BBTOB(split_bblks), |
1da177e4 | 3516 | BBTOB(bblks - split_bblks)); |
234f56ac | 3517 | if (error) |
1da177e4 | 3518 | goto bread_err2; |
076e6acb CH |
3519 | |
3520 | error = xlog_bread_noalign(log, wrapped_hblks, | |
3521 | bblks - split_bblks, | |
3522 | dbp); | |
3523 | if (error) | |
3524 | goto bread_err2; | |
3525 | ||
fc5bc4c8 | 3526 | error = XFS_BUF_SET_PTR(dbp, offset, h_size); |
076e6acb CH |
3527 | if (error) |
3528 | goto bread_err2; | |
1da177e4 LT |
3529 | } |
3530 | xlog_unpack_data(rhead, offset, log); | |
3531 | if ((error = xlog_recover_process_data(log, rhash, | |
3532 | rhead, offset, pass))) | |
3533 | goto bread_err2; | |
3534 | blk_no += bblks; | |
3535 | } | |
3536 | ||
3537 | ASSERT(blk_no >= log->l_logBBsize); | |
3538 | blk_no -= log->l_logBBsize; | |
3539 | ||
3540 | /* read first part of physical log */ | |
3541 | while (blk_no < head_blk) { | |
076e6acb CH |
3542 | error = xlog_bread(log, blk_no, hblks, hbp, &offset); |
3543 | if (error) | |
1da177e4 | 3544 | goto bread_err2; |
076e6acb | 3545 | |
1da177e4 LT |
3546 | rhead = (xlog_rec_header_t *)offset; |
3547 | error = xlog_valid_rec_header(log, rhead, blk_no); | |
3548 | if (error) | |
3549 | goto bread_err2; | |
076e6acb | 3550 | |
b53e675d | 3551 | bblks = (int)BTOBB(be32_to_cpu(rhead->h_len)); |
076e6acb CH |
3552 | error = xlog_bread(log, blk_no+hblks, bblks, dbp, |
3553 | &offset); | |
3554 | if (error) | |
1da177e4 | 3555 | goto bread_err2; |
076e6acb | 3556 | |
1da177e4 LT |
3557 | xlog_unpack_data(rhead, offset, log); |
3558 | if ((error = xlog_recover_process_data(log, rhash, | |
3559 | rhead, offset, pass))) | |
3560 | goto bread_err2; | |
3561 | blk_no += bblks + hblks; | |
3562 | } | |
3563 | } | |
3564 | ||
3565 | bread_err2: | |
3566 | xlog_put_bp(dbp); | |
3567 | bread_err1: | |
3568 | xlog_put_bp(hbp); | |
3569 | return error; | |
3570 | } | |
3571 | ||
3572 | /* | |
3573 | * Do the recovery of the log. We actually do this in two phases. | |
3574 | * The two passes are necessary in order to implement the function | |
3575 | * of cancelling a record written into the log. The first pass | |
3576 | * determines those things which have been cancelled, and the | |
3577 | * second pass replays log items normally except for those which | |
3578 | * have been cancelled. The handling of the replay and cancellations | |
3579 | * takes place in the log item type specific routines. | |
3580 | * | |
3581 | * The table of items which have cancel records in the log is allocated | |
3582 | * and freed at this level, since only here do we know when all of | |
3583 | * the log recovery has been completed. | |
3584 | */ | |
3585 | STATIC int | |
3586 | xlog_do_log_recovery( | |
3587 | xlog_t *log, | |
3588 | xfs_daddr_t head_blk, | |
3589 | xfs_daddr_t tail_blk) | |
3590 | { | |
d5689eaa | 3591 | int error, i; |
1da177e4 LT |
3592 | |
3593 | ASSERT(head_blk != tail_blk); | |
3594 | ||
3595 | /* | |
3596 | * First do a pass to find all of the cancelled buf log items. | |
3597 | * Store them in the buf_cancel_table for use in the second pass. | |
3598 | */ | |
d5689eaa CH |
3599 | log->l_buf_cancel_table = kmem_zalloc(XLOG_BC_TABLE_SIZE * |
3600 | sizeof(struct list_head), | |
1da177e4 | 3601 | KM_SLEEP); |
d5689eaa CH |
3602 | for (i = 0; i < XLOG_BC_TABLE_SIZE; i++) |
3603 | INIT_LIST_HEAD(&log->l_buf_cancel_table[i]); | |
3604 | ||
1da177e4 LT |
3605 | error = xlog_do_recovery_pass(log, head_blk, tail_blk, |
3606 | XLOG_RECOVER_PASS1); | |
3607 | if (error != 0) { | |
f0e2d93c | 3608 | kmem_free(log->l_buf_cancel_table); |
1da177e4 LT |
3609 | log->l_buf_cancel_table = NULL; |
3610 | return error; | |
3611 | } | |
3612 | /* | |
3613 | * Then do a second pass to actually recover the items in the log. | |
3614 | * When it is complete free the table of buf cancel items. | |
3615 | */ | |
3616 | error = xlog_do_recovery_pass(log, head_blk, tail_blk, | |
3617 | XLOG_RECOVER_PASS2); | |
3618 | #ifdef DEBUG | |
6d192a9b | 3619 | if (!error) { |
1da177e4 LT |
3620 | int i; |
3621 | ||
3622 | for (i = 0; i < XLOG_BC_TABLE_SIZE; i++) | |
d5689eaa | 3623 | ASSERT(list_empty(&log->l_buf_cancel_table[i])); |
1da177e4 LT |
3624 | } |
3625 | #endif /* DEBUG */ | |
3626 | ||
f0e2d93c | 3627 | kmem_free(log->l_buf_cancel_table); |
1da177e4 LT |
3628 | log->l_buf_cancel_table = NULL; |
3629 | ||
3630 | return error; | |
3631 | } | |
3632 | ||
3633 | /* | |
3634 | * Do the actual recovery | |
3635 | */ | |
3636 | STATIC int | |
3637 | xlog_do_recover( | |
3638 | xlog_t *log, | |
3639 | xfs_daddr_t head_blk, | |
3640 | xfs_daddr_t tail_blk) | |
3641 | { | |
3642 | int error; | |
3643 | xfs_buf_t *bp; | |
3644 | xfs_sb_t *sbp; | |
3645 | ||
3646 | /* | |
3647 | * First replay the images in the log. | |
3648 | */ | |
3649 | error = xlog_do_log_recovery(log, head_blk, tail_blk); | |
3650 | if (error) { | |
3651 | return error; | |
3652 | } | |
3653 | ||
3654 | XFS_bflush(log->l_mp->m_ddev_targp); | |
3655 | ||
3656 | /* | |
3657 | * If IO errors happened during recovery, bail out. | |
3658 | */ | |
3659 | if (XFS_FORCED_SHUTDOWN(log->l_mp)) { | |
3660 | return (EIO); | |
3661 | } | |
3662 | ||
3663 | /* | |
3664 | * We now update the tail_lsn since much of the recovery has completed | |
3665 | * and there may be space available to use. If there were no extent | |
3666 | * or iunlinks, we can free up the entire log and set the tail_lsn to | |
3667 | * be the last_sync_lsn. This was set in xlog_find_tail to be the | |
3668 | * lsn of the last known good LR on disk. If there are extent frees | |
3669 | * or iunlinks they will have some entries in the AIL; so we look at | |
3670 | * the AIL to determine how to set the tail_lsn. | |
3671 | */ | |
3672 | xlog_assign_tail_lsn(log->l_mp); | |
3673 | ||
3674 | /* | |
3675 | * Now that we've finished replaying all buffer and inode | |
3676 | * updates, re-read in the superblock. | |
3677 | */ | |
3678 | bp = xfs_getsb(log->l_mp, 0); | |
3679 | XFS_BUF_UNDONE(bp); | |
bebf963f LM |
3680 | ASSERT(!(XFS_BUF_ISWRITE(bp))); |
3681 | ASSERT(!(XFS_BUF_ISDELAYWRITE(bp))); | |
1da177e4 | 3682 | XFS_BUF_READ(bp); |
bebf963f | 3683 | XFS_BUF_UNASYNC(bp); |
1da177e4 | 3684 | xfsbdstrat(log->l_mp, bp); |
1a1a3e97 | 3685 | error = xfs_buf_iowait(bp); |
d64e31a2 | 3686 | if (error) { |
1da177e4 LT |
3687 | xfs_ioerror_alert("xlog_do_recover", |
3688 | log->l_mp, bp, XFS_BUF_ADDR(bp)); | |
3689 | ASSERT(0); | |
3690 | xfs_buf_relse(bp); | |
3691 | return error; | |
3692 | } | |
3693 | ||
3694 | /* Convert superblock from on-disk format */ | |
3695 | sbp = &log->l_mp->m_sb; | |
2bdf7cd0 | 3696 | xfs_sb_from_disk(sbp, XFS_BUF_TO_SBP(bp)); |
1da177e4 | 3697 | ASSERT(sbp->sb_magicnum == XFS_SB_MAGIC); |
62118709 | 3698 | ASSERT(xfs_sb_good_version(sbp)); |
1da177e4 LT |
3699 | xfs_buf_relse(bp); |
3700 | ||
5478eead LM |
3701 | /* We've re-read the superblock so re-initialize per-cpu counters */ |
3702 | xfs_icsb_reinit_counters(log->l_mp); | |
3703 | ||
1da177e4 LT |
3704 | xlog_recover_check_summary(log); |
3705 | ||
3706 | /* Normal transactions can now occur */ | |
3707 | log->l_flags &= ~XLOG_ACTIVE_RECOVERY; | |
3708 | return 0; | |
3709 | } | |
3710 | ||
3711 | /* | |
3712 | * Perform recovery and re-initialize some log variables in xlog_find_tail. | |
3713 | * | |
3714 | * Return error or zero. | |
3715 | */ | |
3716 | int | |
3717 | xlog_recover( | |
65be6054 | 3718 | xlog_t *log) |
1da177e4 LT |
3719 | { |
3720 | xfs_daddr_t head_blk, tail_blk; | |
3721 | int error; | |
3722 | ||
3723 | /* find the tail of the log */ | |
65be6054 | 3724 | if ((error = xlog_find_tail(log, &head_blk, &tail_blk))) |
1da177e4 LT |
3725 | return error; |
3726 | ||
3727 | if (tail_blk != head_blk) { | |
3728 | /* There used to be a comment here: | |
3729 | * | |
3730 | * disallow recovery on read-only mounts. note -- mount | |
3731 | * checks for ENOSPC and turns it into an intelligent | |
3732 | * error message. | |
3733 | * ...but this is no longer true. Now, unless you specify | |
3734 | * NORECOVERY (in which case this function would never be | |
3735 | * called), we just go ahead and recover. We do this all | |
3736 | * under the vfs layer, so we can get away with it unless | |
3737 | * the device itself is read-only, in which case we fail. | |
3738 | */ | |
3a02ee18 | 3739 | if ((error = xfs_dev_is_read_only(log->l_mp, "recovery"))) { |
1da177e4 LT |
3740 | return error; |
3741 | } | |
3742 | ||
3743 | cmn_err(CE_NOTE, | |
fc1f8c1c NS |
3744 | "Starting XFS recovery on filesystem: %s (logdev: %s)", |
3745 | log->l_mp->m_fsname, log->l_mp->m_logname ? | |
3746 | log->l_mp->m_logname : "internal"); | |
1da177e4 LT |
3747 | |
3748 | error = xlog_do_recover(log, head_blk, tail_blk); | |
3749 | log->l_flags |= XLOG_RECOVERY_NEEDED; | |
3750 | } | |
3751 | return error; | |
3752 | } | |
3753 | ||
3754 | /* | |
3755 | * In the first part of recovery we replay inodes and buffers and build | |
3756 | * up the list of extent free items which need to be processed. Here | |
3757 | * we process the extent free items and clean up the on disk unlinked | |
3758 | * inode lists. This is separated from the first part of recovery so | |
3759 | * that the root and real-time bitmap inodes can be read in from disk in | |
3760 | * between the two stages. This is necessary so that we can free space | |
3761 | * in the real-time portion of the file system. | |
3762 | */ | |
3763 | int | |
3764 | xlog_recover_finish( | |
4249023a | 3765 | xlog_t *log) |
1da177e4 LT |
3766 | { |
3767 | /* | |
3768 | * Now we're ready to do the transactions needed for the | |
3769 | * rest of recovery. Start with completing all the extent | |
3770 | * free intent records and then process the unlinked inode | |
3771 | * lists. At this point, we essentially run in normal mode | |
3772 | * except that we're still performing recovery actions | |
3773 | * rather than accepting new requests. | |
3774 | */ | |
3775 | if (log->l_flags & XLOG_RECOVERY_NEEDED) { | |
3c1e2bbe DC |
3776 | int error; |
3777 | error = xlog_recover_process_efis(log); | |
3778 | if (error) { | |
3779 | cmn_err(CE_ALERT, | |
3780 | "Failed to recover EFIs on filesystem: %s", | |
3781 | log->l_mp->m_fsname); | |
3782 | return error; | |
3783 | } | |
1da177e4 LT |
3784 | /* |
3785 | * Sync the log to get all the EFIs out of the AIL. | |
3786 | * This isn't absolutely necessary, but it helps in | |
3787 | * case the unlink transactions would have problems | |
3788 | * pushing the EFIs out of the way. | |
3789 | */ | |
a14a348b | 3790 | xfs_log_force(log->l_mp, XFS_LOG_SYNC); |
1da177e4 | 3791 | |
4249023a | 3792 | xlog_recover_process_iunlinks(log); |
1da177e4 LT |
3793 | |
3794 | xlog_recover_check_summary(log); | |
3795 | ||
3796 | cmn_err(CE_NOTE, | |
fc1f8c1c NS |
3797 | "Ending XFS recovery on filesystem: %s (logdev: %s)", |
3798 | log->l_mp->m_fsname, log->l_mp->m_logname ? | |
3799 | log->l_mp->m_logname : "internal"); | |
1da177e4 LT |
3800 | log->l_flags &= ~XLOG_RECOVERY_NEEDED; |
3801 | } else { | |
3802 | cmn_err(CE_DEBUG, | |
73efe4a4 | 3803 | "Ending clean XFS mount for filesystem: %s\n", |
1da177e4 LT |
3804 | log->l_mp->m_fsname); |
3805 | } | |
3806 | return 0; | |
3807 | } | |
3808 | ||
3809 | ||
3810 | #if defined(DEBUG) | |
3811 | /* | |
3812 | * Read all of the agf and agi counters and check that they | |
3813 | * are consistent with the superblock counters. | |
3814 | */ | |
3815 | void | |
3816 | xlog_recover_check_summary( | |
3817 | xlog_t *log) | |
3818 | { | |
3819 | xfs_mount_t *mp; | |
3820 | xfs_agf_t *agfp; | |
1da177e4 LT |
3821 | xfs_buf_t *agfbp; |
3822 | xfs_buf_t *agibp; | |
1da177e4 LT |
3823 | xfs_agnumber_t agno; |
3824 | __uint64_t freeblks; | |
3825 | __uint64_t itotal; | |
3826 | __uint64_t ifree; | |
5e1be0fb | 3827 | int error; |
1da177e4 LT |
3828 | |
3829 | mp = log->l_mp; | |
3830 | ||
3831 | freeblks = 0LL; | |
3832 | itotal = 0LL; | |
3833 | ifree = 0LL; | |
3834 | for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) { | |
4805621a FCH |
3835 | error = xfs_read_agf(mp, NULL, agno, 0, &agfbp); |
3836 | if (error) { | |
3837 | xfs_fs_cmn_err(CE_ALERT, mp, | |
3838 | "xlog_recover_check_summary(agf)" | |
3839 | "agf read failed agno %d error %d", | |
3840 | agno, error); | |
3841 | } else { | |
3842 | agfp = XFS_BUF_TO_AGF(agfbp); | |
3843 | freeblks += be32_to_cpu(agfp->agf_freeblks) + | |
3844 | be32_to_cpu(agfp->agf_flcount); | |
3845 | xfs_buf_relse(agfbp); | |
1da177e4 | 3846 | } |
1da177e4 | 3847 | |
5e1be0fb CH |
3848 | error = xfs_read_agi(mp, NULL, agno, &agibp); |
3849 | if (!error) { | |
3850 | struct xfs_agi *agi = XFS_BUF_TO_AGI(agibp); | |
16259e7d | 3851 | |
5e1be0fb CH |
3852 | itotal += be32_to_cpu(agi->agi_count); |
3853 | ifree += be32_to_cpu(agi->agi_freecount); | |
3854 | xfs_buf_relse(agibp); | |
3855 | } | |
1da177e4 | 3856 | } |
1da177e4 LT |
3857 | } |
3858 | #endif /* DEBUG */ |