Commit | Line | Data |
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1da177e4 | 1 | /* |
87c199c2 | 2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
7b718769 | 3 | * All Rights Reserved. |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_fs.h" |
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 | 42 | #include "xfs_quota.h" |
43355099 | 43 | #include "xfs_utils.h" |
0b1b213f | 44 | #include "xfs_trace.h" |
1da177e4 LT |
45 | |
46 | STATIC int xlog_find_zeroed(xlog_t *, xfs_daddr_t *); | |
47 | STATIC int xlog_clear_stale_blocks(xlog_t *, xfs_lsn_t); | |
1da177e4 LT |
48 | #if defined(DEBUG) |
49 | STATIC void xlog_recover_check_summary(xlog_t *); | |
1da177e4 LT |
50 | #else |
51 | #define xlog_recover_check_summary(log) | |
1da177e4 LT |
52 | #endif |
53 | ||
d5689eaa CH |
54 | /* |
55 | * This structure is used during recovery to record the buf log items which | |
56 | * have been canceled and should not be replayed. | |
57 | */ | |
58 | struct xfs_buf_cancel { | |
59 | xfs_daddr_t bc_blkno; | |
60 | uint bc_len; | |
61 | int bc_refcount; | |
62 | struct list_head bc_list; | |
63 | }; | |
64 | ||
1da177e4 LT |
65 | /* |
66 | * Sector aligned buffer routines for buffer create/read/write/access | |
67 | */ | |
68 | ||
ff30a622 AE |
69 | /* |
70 | * Verify the given count of basic blocks is valid number of blocks | |
71 | * to specify for an operation involving the given XFS log buffer. | |
72 | * Returns nonzero if the count is valid, 0 otherwise. | |
73 | */ | |
74 | ||
75 | static inline int | |
76 | xlog_buf_bbcount_valid( | |
77 | xlog_t *log, | |
78 | int bbcount) | |
79 | { | |
80 | return bbcount > 0 && bbcount <= log->l_logBBsize; | |
81 | } | |
82 | ||
36adecff AE |
83 | /* |
84 | * Allocate a buffer to hold log data. The buffer needs to be able | |
85 | * to map to a range of nbblks basic blocks at any valid (basic | |
86 | * block) offset within the log. | |
87 | */ | |
5d77c0dc | 88 | STATIC xfs_buf_t * |
1da177e4 LT |
89 | xlog_get_bp( |
90 | xlog_t *log, | |
3228149c | 91 | int nbblks) |
1da177e4 | 92 | { |
c8da0faf CH |
93 | struct xfs_buf *bp; |
94 | ||
ff30a622 | 95 | if (!xlog_buf_bbcount_valid(log, nbblks)) { |
a0fa2b67 | 96 | xfs_warn(log->l_mp, "Invalid block length (0x%x) for buffer", |
ff30a622 AE |
97 | nbblks); |
98 | XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp); | |
3228149c DC |
99 | return NULL; |
100 | } | |
1da177e4 | 101 | |
36adecff AE |
102 | /* |
103 | * We do log I/O in units of log sectors (a power-of-2 | |
104 | * multiple of the basic block size), so we round up the | |
25985edc | 105 | * requested size to accommodate the basic blocks required |
36adecff AE |
106 | * for complete log sectors. |
107 | * | |
108 | * In addition, the buffer may be used for a non-sector- | |
109 | * aligned block offset, in which case an I/O of the | |
110 | * requested size could extend beyond the end of the | |
111 | * buffer. If the requested size is only 1 basic block it | |
112 | * will never straddle a sector boundary, so this won't be | |
113 | * an issue. Nor will this be a problem if the log I/O is | |
114 | * done in basic blocks (sector size 1). But otherwise we | |
115 | * extend the buffer by one extra log sector to ensure | |
25985edc | 116 | * there's space to accommodate this possibility. |
36adecff | 117 | */ |
69ce58f0 AE |
118 | if (nbblks > 1 && log->l_sectBBsize > 1) |
119 | nbblks += log->l_sectBBsize; | |
120 | nbblks = round_up(nbblks, log->l_sectBBsize); | |
36adecff | 121 | |
e70b73f8 | 122 | bp = xfs_buf_get_uncached(log->l_mp->m_logdev_targp, nbblks, 0); |
c8da0faf CH |
123 | if (bp) |
124 | xfs_buf_unlock(bp); | |
125 | return bp; | |
1da177e4 LT |
126 | } |
127 | ||
5d77c0dc | 128 | STATIC void |
1da177e4 LT |
129 | xlog_put_bp( |
130 | xfs_buf_t *bp) | |
131 | { | |
132 | xfs_buf_free(bp); | |
133 | } | |
134 | ||
48389ef1 AE |
135 | /* |
136 | * Return the address of the start of the given block number's data | |
137 | * in a log buffer. The buffer covers a log sector-aligned region. | |
138 | */ | |
076e6acb CH |
139 | STATIC xfs_caddr_t |
140 | xlog_align( | |
141 | xlog_t *log, | |
142 | xfs_daddr_t blk_no, | |
143 | int nbblks, | |
144 | xfs_buf_t *bp) | |
145 | { | |
fdc07f44 | 146 | xfs_daddr_t offset = blk_no & ((xfs_daddr_t)log->l_sectBBsize - 1); |
076e6acb | 147 | |
4e94b71b | 148 | ASSERT(offset + nbblks <= bp->b_length); |
62926044 | 149 | return bp->b_addr + BBTOB(offset); |
076e6acb CH |
150 | } |
151 | ||
1da177e4 LT |
152 | |
153 | /* | |
154 | * nbblks should be uint, but oh well. Just want to catch that 32-bit length. | |
155 | */ | |
076e6acb CH |
156 | STATIC int |
157 | xlog_bread_noalign( | |
1da177e4 LT |
158 | xlog_t *log, |
159 | xfs_daddr_t blk_no, | |
160 | int nbblks, | |
161 | xfs_buf_t *bp) | |
162 | { | |
163 | int error; | |
164 | ||
ff30a622 | 165 | if (!xlog_buf_bbcount_valid(log, nbblks)) { |
a0fa2b67 | 166 | xfs_warn(log->l_mp, "Invalid block length (0x%x) for buffer", |
ff30a622 AE |
167 | nbblks); |
168 | XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp); | |
3228149c DC |
169 | return EFSCORRUPTED; |
170 | } | |
171 | ||
69ce58f0 AE |
172 | blk_no = round_down(blk_no, log->l_sectBBsize); |
173 | nbblks = round_up(nbblks, log->l_sectBBsize); | |
1da177e4 LT |
174 | |
175 | ASSERT(nbblks > 0); | |
4e94b71b | 176 | ASSERT(nbblks <= bp->b_length); |
1da177e4 LT |
177 | |
178 | XFS_BUF_SET_ADDR(bp, log->l_logBBstart + blk_no); | |
179 | XFS_BUF_READ(bp); | |
aa0e8833 | 180 | bp->b_io_length = nbblks; |
0e95f19a | 181 | bp->b_error = 0; |
1da177e4 LT |
182 | |
183 | xfsbdstrat(log->l_mp, bp); | |
1a1a3e97 | 184 | error = xfs_buf_iowait(bp); |
d64e31a2 | 185 | if (error) |
901796af | 186 | xfs_buf_ioerror_alert(bp, __func__); |
1da177e4 LT |
187 | return error; |
188 | } | |
189 | ||
076e6acb CH |
190 | STATIC int |
191 | xlog_bread( | |
192 | xlog_t *log, | |
193 | xfs_daddr_t blk_no, | |
194 | int nbblks, | |
195 | xfs_buf_t *bp, | |
196 | xfs_caddr_t *offset) | |
197 | { | |
198 | int error; | |
199 | ||
200 | error = xlog_bread_noalign(log, blk_no, nbblks, bp); | |
201 | if (error) | |
202 | return error; | |
203 | ||
204 | *offset = xlog_align(log, blk_no, nbblks, bp); | |
205 | return 0; | |
206 | } | |
207 | ||
44396476 DC |
208 | /* |
209 | * Read at an offset into the buffer. Returns with the buffer in it's original | |
210 | * state regardless of the result of the read. | |
211 | */ | |
212 | STATIC int | |
213 | xlog_bread_offset( | |
214 | xlog_t *log, | |
215 | xfs_daddr_t blk_no, /* block to read from */ | |
216 | int nbblks, /* blocks to read */ | |
217 | xfs_buf_t *bp, | |
218 | xfs_caddr_t offset) | |
219 | { | |
62926044 | 220 | xfs_caddr_t orig_offset = bp->b_addr; |
4e94b71b | 221 | int orig_len = BBTOB(bp->b_length); |
44396476 DC |
222 | int error, error2; |
223 | ||
02fe03d9 | 224 | error = xfs_buf_associate_memory(bp, offset, BBTOB(nbblks)); |
44396476 DC |
225 | if (error) |
226 | return error; | |
227 | ||
228 | error = xlog_bread_noalign(log, blk_no, nbblks, bp); | |
229 | ||
230 | /* must reset buffer pointer even on error */ | |
02fe03d9 | 231 | error2 = xfs_buf_associate_memory(bp, orig_offset, orig_len); |
44396476 DC |
232 | if (error) |
233 | return error; | |
234 | return error2; | |
235 | } | |
236 | ||
1da177e4 LT |
237 | /* |
238 | * Write out the buffer at the given block for the given number of blocks. | |
239 | * The buffer is kept locked across the write and is returned locked. | |
240 | * This can only be used for synchronous log writes. | |
241 | */ | |
ba0f32d4 | 242 | STATIC int |
1da177e4 LT |
243 | xlog_bwrite( |
244 | xlog_t *log, | |
245 | xfs_daddr_t blk_no, | |
246 | int nbblks, | |
247 | xfs_buf_t *bp) | |
248 | { | |
249 | int error; | |
250 | ||
ff30a622 | 251 | if (!xlog_buf_bbcount_valid(log, nbblks)) { |
a0fa2b67 | 252 | xfs_warn(log->l_mp, "Invalid block length (0x%x) for buffer", |
ff30a622 AE |
253 | nbblks); |
254 | XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp); | |
3228149c DC |
255 | return EFSCORRUPTED; |
256 | } | |
257 | ||
69ce58f0 AE |
258 | blk_no = round_down(blk_no, log->l_sectBBsize); |
259 | nbblks = round_up(nbblks, log->l_sectBBsize); | |
1da177e4 LT |
260 | |
261 | ASSERT(nbblks > 0); | |
4e94b71b | 262 | ASSERT(nbblks <= bp->b_length); |
1da177e4 LT |
263 | |
264 | XFS_BUF_SET_ADDR(bp, log->l_logBBstart + blk_no); | |
265 | XFS_BUF_ZEROFLAGS(bp); | |
72790aa1 | 266 | xfs_buf_hold(bp); |
0c842ad4 | 267 | xfs_buf_lock(bp); |
aa0e8833 | 268 | bp->b_io_length = nbblks; |
0e95f19a | 269 | bp->b_error = 0; |
1da177e4 | 270 | |
c2b006c1 | 271 | error = xfs_bwrite(bp); |
901796af CH |
272 | if (error) |
273 | xfs_buf_ioerror_alert(bp, __func__); | |
c2b006c1 | 274 | xfs_buf_relse(bp); |
1da177e4 LT |
275 | return error; |
276 | } | |
277 | ||
1da177e4 LT |
278 | #ifdef DEBUG |
279 | /* | |
280 | * dump debug superblock and log record information | |
281 | */ | |
282 | STATIC void | |
283 | xlog_header_check_dump( | |
284 | xfs_mount_t *mp, | |
285 | xlog_rec_header_t *head) | |
286 | { | |
a0fa2b67 | 287 | xfs_debug(mp, "%s: SB : uuid = %pU, fmt = %d\n", |
03daa57c | 288 | __func__, &mp->m_sb.sb_uuid, XLOG_FMT); |
a0fa2b67 | 289 | xfs_debug(mp, " log : uuid = %pU, fmt = %d\n", |
03daa57c | 290 | &head->h_fs_uuid, be32_to_cpu(head->h_fmt)); |
1da177e4 LT |
291 | } |
292 | #else | |
293 | #define xlog_header_check_dump(mp, head) | |
294 | #endif | |
295 | ||
296 | /* | |
297 | * check log record header for recovery | |
298 | */ | |
299 | STATIC int | |
300 | xlog_header_check_recover( | |
301 | xfs_mount_t *mp, | |
302 | xlog_rec_header_t *head) | |
303 | { | |
69ef921b | 304 | ASSERT(head->h_magicno == cpu_to_be32(XLOG_HEADER_MAGIC_NUM)); |
1da177e4 LT |
305 | |
306 | /* | |
307 | * IRIX doesn't write the h_fmt field and leaves it zeroed | |
308 | * (XLOG_FMT_UNKNOWN). This stops us from trying to recover | |
309 | * a dirty log created in IRIX. | |
310 | */ | |
69ef921b | 311 | if (unlikely(head->h_fmt != cpu_to_be32(XLOG_FMT))) { |
a0fa2b67 DC |
312 | xfs_warn(mp, |
313 | "dirty log written in incompatible format - can't recover"); | |
1da177e4 LT |
314 | xlog_header_check_dump(mp, head); |
315 | XFS_ERROR_REPORT("xlog_header_check_recover(1)", | |
316 | XFS_ERRLEVEL_HIGH, mp); | |
317 | return XFS_ERROR(EFSCORRUPTED); | |
318 | } else if (unlikely(!uuid_equal(&mp->m_sb.sb_uuid, &head->h_fs_uuid))) { | |
a0fa2b67 DC |
319 | xfs_warn(mp, |
320 | "dirty log entry has mismatched uuid - can't recover"); | |
1da177e4 LT |
321 | xlog_header_check_dump(mp, head); |
322 | XFS_ERROR_REPORT("xlog_header_check_recover(2)", | |
323 | XFS_ERRLEVEL_HIGH, mp); | |
324 | return XFS_ERROR(EFSCORRUPTED); | |
325 | } | |
326 | return 0; | |
327 | } | |
328 | ||
329 | /* | |
330 | * read the head block of the log and check the header | |
331 | */ | |
332 | STATIC int | |
333 | xlog_header_check_mount( | |
334 | xfs_mount_t *mp, | |
335 | xlog_rec_header_t *head) | |
336 | { | |
69ef921b | 337 | ASSERT(head->h_magicno == cpu_to_be32(XLOG_HEADER_MAGIC_NUM)); |
1da177e4 LT |
338 | |
339 | if (uuid_is_nil(&head->h_fs_uuid)) { | |
340 | /* | |
341 | * IRIX doesn't write the h_fs_uuid or h_fmt fields. If | |
342 | * h_fs_uuid is nil, we assume this log was last mounted | |
343 | * by IRIX and continue. | |
344 | */ | |
a0fa2b67 | 345 | xfs_warn(mp, "nil uuid in log - IRIX style log"); |
1da177e4 | 346 | } else if (unlikely(!uuid_equal(&mp->m_sb.sb_uuid, &head->h_fs_uuid))) { |
a0fa2b67 | 347 | xfs_warn(mp, "log has mismatched uuid - can't recover"); |
1da177e4 LT |
348 | xlog_header_check_dump(mp, head); |
349 | XFS_ERROR_REPORT("xlog_header_check_mount", | |
350 | XFS_ERRLEVEL_HIGH, mp); | |
351 | return XFS_ERROR(EFSCORRUPTED); | |
352 | } | |
353 | return 0; | |
354 | } | |
355 | ||
356 | STATIC void | |
357 | xlog_recover_iodone( | |
358 | struct xfs_buf *bp) | |
359 | { | |
5a52c2a5 | 360 | if (bp->b_error) { |
1da177e4 LT |
361 | /* |
362 | * We're not going to bother about retrying | |
363 | * this during recovery. One strike! | |
364 | */ | |
901796af | 365 | xfs_buf_ioerror_alert(bp, __func__); |
ebad861b DC |
366 | xfs_force_shutdown(bp->b_target->bt_mount, |
367 | SHUTDOWN_META_IO_ERROR); | |
1da177e4 | 368 | } |
cb669ca5 | 369 | bp->b_iodone = NULL; |
1a1a3e97 | 370 | xfs_buf_ioend(bp, 0); |
1da177e4 LT |
371 | } |
372 | ||
373 | /* | |
374 | * This routine finds (to an approximation) the first block in the physical | |
375 | * log which contains the given cycle. It uses a binary search algorithm. | |
376 | * Note that the algorithm can not be perfect because the disk will not | |
377 | * necessarily be perfect. | |
378 | */ | |
a8272ce0 | 379 | STATIC int |
1da177e4 LT |
380 | xlog_find_cycle_start( |
381 | xlog_t *log, | |
382 | xfs_buf_t *bp, | |
383 | xfs_daddr_t first_blk, | |
384 | xfs_daddr_t *last_blk, | |
385 | uint cycle) | |
386 | { | |
387 | xfs_caddr_t offset; | |
388 | xfs_daddr_t mid_blk; | |
e3bb2e30 | 389 | xfs_daddr_t end_blk; |
1da177e4 LT |
390 | uint mid_cycle; |
391 | int error; | |
392 | ||
e3bb2e30 AE |
393 | end_blk = *last_blk; |
394 | mid_blk = BLK_AVG(first_blk, end_blk); | |
395 | while (mid_blk != first_blk && mid_blk != end_blk) { | |
076e6acb CH |
396 | error = xlog_bread(log, mid_blk, 1, bp, &offset); |
397 | if (error) | |
1da177e4 | 398 | return error; |
03bea6fe | 399 | mid_cycle = xlog_get_cycle(offset); |
e3bb2e30 AE |
400 | if (mid_cycle == cycle) |
401 | end_blk = mid_blk; /* last_half_cycle == mid_cycle */ | |
402 | else | |
403 | first_blk = mid_blk; /* first_half_cycle == mid_cycle */ | |
404 | mid_blk = BLK_AVG(first_blk, end_blk); | |
1da177e4 | 405 | } |
e3bb2e30 AE |
406 | ASSERT((mid_blk == first_blk && mid_blk+1 == end_blk) || |
407 | (mid_blk == end_blk && mid_blk-1 == first_blk)); | |
408 | ||
409 | *last_blk = end_blk; | |
1da177e4 LT |
410 | |
411 | return 0; | |
412 | } | |
413 | ||
414 | /* | |
3f943d85 AE |
415 | * Check that a range of blocks does not contain stop_on_cycle_no. |
416 | * Fill in *new_blk with the block offset where such a block is | |
417 | * found, or with -1 (an invalid block number) if there is no such | |
418 | * block in the range. The scan needs to occur from front to back | |
419 | * and the pointer into the region must be updated since a later | |
420 | * routine will need to perform another test. | |
1da177e4 LT |
421 | */ |
422 | STATIC int | |
423 | xlog_find_verify_cycle( | |
424 | xlog_t *log, | |
425 | xfs_daddr_t start_blk, | |
426 | int nbblks, | |
427 | uint stop_on_cycle_no, | |
428 | xfs_daddr_t *new_blk) | |
429 | { | |
430 | xfs_daddr_t i, j; | |
431 | uint cycle; | |
432 | xfs_buf_t *bp; | |
433 | xfs_daddr_t bufblks; | |
434 | xfs_caddr_t buf = NULL; | |
435 | int error = 0; | |
436 | ||
6881a229 AE |
437 | /* |
438 | * Greedily allocate a buffer big enough to handle the full | |
439 | * range of basic blocks we'll be examining. If that fails, | |
440 | * try a smaller size. We need to be able to read at least | |
441 | * a log sector, or we're out of luck. | |
442 | */ | |
1da177e4 | 443 | bufblks = 1 << ffs(nbblks); |
81158e0c DC |
444 | while (bufblks > log->l_logBBsize) |
445 | bufblks >>= 1; | |
1da177e4 | 446 | while (!(bp = xlog_get_bp(log, bufblks))) { |
1da177e4 | 447 | bufblks >>= 1; |
69ce58f0 | 448 | if (bufblks < log->l_sectBBsize) |
1da177e4 LT |
449 | return ENOMEM; |
450 | } | |
451 | ||
452 | for (i = start_blk; i < start_blk + nbblks; i += bufblks) { | |
453 | int bcount; | |
454 | ||
455 | bcount = min(bufblks, (start_blk + nbblks - i)); | |
456 | ||
076e6acb CH |
457 | error = xlog_bread(log, i, bcount, bp, &buf); |
458 | if (error) | |
1da177e4 LT |
459 | goto out; |
460 | ||
1da177e4 | 461 | for (j = 0; j < bcount; j++) { |
03bea6fe | 462 | cycle = xlog_get_cycle(buf); |
1da177e4 LT |
463 | if (cycle == stop_on_cycle_no) { |
464 | *new_blk = i+j; | |
465 | goto out; | |
466 | } | |
467 | ||
468 | buf += BBSIZE; | |
469 | } | |
470 | } | |
471 | ||
472 | *new_blk = -1; | |
473 | ||
474 | out: | |
475 | xlog_put_bp(bp); | |
476 | return error; | |
477 | } | |
478 | ||
479 | /* | |
480 | * Potentially backup over partial log record write. | |
481 | * | |
482 | * In the typical case, last_blk is the number of the block directly after | |
483 | * a good log record. Therefore, we subtract one to get the block number | |
484 | * of the last block in the given buffer. extra_bblks contains the number | |
485 | * of blocks we would have read on a previous read. This happens when the | |
486 | * last log record is split over the end of the physical log. | |
487 | * | |
488 | * extra_bblks is the number of blocks potentially verified on a previous | |
489 | * call to this routine. | |
490 | */ | |
491 | STATIC int | |
492 | xlog_find_verify_log_record( | |
493 | xlog_t *log, | |
494 | xfs_daddr_t start_blk, | |
495 | xfs_daddr_t *last_blk, | |
496 | int extra_bblks) | |
497 | { | |
498 | xfs_daddr_t i; | |
499 | xfs_buf_t *bp; | |
500 | xfs_caddr_t offset = NULL; | |
501 | xlog_rec_header_t *head = NULL; | |
502 | int error = 0; | |
503 | int smallmem = 0; | |
504 | int num_blks = *last_blk - start_blk; | |
505 | int xhdrs; | |
506 | ||
507 | ASSERT(start_blk != 0 || *last_blk != start_blk); | |
508 | ||
509 | if (!(bp = xlog_get_bp(log, num_blks))) { | |
510 | if (!(bp = xlog_get_bp(log, 1))) | |
511 | return ENOMEM; | |
512 | smallmem = 1; | |
513 | } else { | |
076e6acb CH |
514 | error = xlog_bread(log, start_blk, num_blks, bp, &offset); |
515 | if (error) | |
1da177e4 | 516 | goto out; |
1da177e4 LT |
517 | offset += ((num_blks - 1) << BBSHIFT); |
518 | } | |
519 | ||
520 | for (i = (*last_blk) - 1; i >= 0; i--) { | |
521 | if (i < start_blk) { | |
522 | /* valid log record not found */ | |
a0fa2b67 DC |
523 | xfs_warn(log->l_mp, |
524 | "Log inconsistent (didn't find previous header)"); | |
1da177e4 LT |
525 | ASSERT(0); |
526 | error = XFS_ERROR(EIO); | |
527 | goto out; | |
528 | } | |
529 | ||
530 | if (smallmem) { | |
076e6acb CH |
531 | error = xlog_bread(log, i, 1, bp, &offset); |
532 | if (error) | |
1da177e4 | 533 | goto out; |
1da177e4 LT |
534 | } |
535 | ||
536 | head = (xlog_rec_header_t *)offset; | |
537 | ||
69ef921b | 538 | if (head->h_magicno == cpu_to_be32(XLOG_HEADER_MAGIC_NUM)) |
1da177e4 LT |
539 | break; |
540 | ||
541 | if (!smallmem) | |
542 | offset -= BBSIZE; | |
543 | } | |
544 | ||
545 | /* | |
546 | * We hit the beginning of the physical log & still no header. Return | |
547 | * to caller. If caller can handle a return of -1, then this routine | |
548 | * will be called again for the end of the physical log. | |
549 | */ | |
550 | if (i == -1) { | |
551 | error = -1; | |
552 | goto out; | |
553 | } | |
554 | ||
555 | /* | |
556 | * We have the final block of the good log (the first block | |
557 | * of the log record _before_ the head. So we check the uuid. | |
558 | */ | |
559 | if ((error = xlog_header_check_mount(log->l_mp, head))) | |
560 | goto out; | |
561 | ||
562 | /* | |
563 | * We may have found a log record header before we expected one. | |
564 | * last_blk will be the 1st block # with a given cycle #. We may end | |
565 | * up reading an entire log record. In this case, we don't want to | |
566 | * reset last_blk. Only when last_blk points in the middle of a log | |
567 | * record do we update last_blk. | |
568 | */ | |
62118709 | 569 | if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { |
b53e675d | 570 | uint h_size = be32_to_cpu(head->h_size); |
1da177e4 LT |
571 | |
572 | xhdrs = h_size / XLOG_HEADER_CYCLE_SIZE; | |
573 | if (h_size % XLOG_HEADER_CYCLE_SIZE) | |
574 | xhdrs++; | |
575 | } else { | |
576 | xhdrs = 1; | |
577 | } | |
578 | ||
b53e675d CH |
579 | if (*last_blk - i + extra_bblks != |
580 | BTOBB(be32_to_cpu(head->h_len)) + xhdrs) | |
1da177e4 LT |
581 | *last_blk = i; |
582 | ||
583 | out: | |
584 | xlog_put_bp(bp); | |
585 | return error; | |
586 | } | |
587 | ||
588 | /* | |
589 | * Head is defined to be the point of the log where the next log write | |
590 | * write could go. This means that incomplete LR writes at the end are | |
591 | * eliminated when calculating the head. We aren't guaranteed that previous | |
592 | * LR have complete transactions. We only know that a cycle number of | |
593 | * current cycle number -1 won't be present in the log if we start writing | |
594 | * from our current block number. | |
595 | * | |
596 | * last_blk contains the block number of the first block with a given | |
597 | * cycle number. | |
598 | * | |
599 | * Return: zero if normal, non-zero if error. | |
600 | */ | |
ba0f32d4 | 601 | STATIC int |
1da177e4 LT |
602 | xlog_find_head( |
603 | xlog_t *log, | |
604 | xfs_daddr_t *return_head_blk) | |
605 | { | |
606 | xfs_buf_t *bp; | |
607 | xfs_caddr_t offset; | |
608 | xfs_daddr_t new_blk, first_blk, start_blk, last_blk, head_blk; | |
609 | int num_scan_bblks; | |
610 | uint first_half_cycle, last_half_cycle; | |
611 | uint stop_on_cycle; | |
612 | int error, log_bbnum = log->l_logBBsize; | |
613 | ||
614 | /* Is the end of the log device zeroed? */ | |
615 | if ((error = xlog_find_zeroed(log, &first_blk)) == -1) { | |
616 | *return_head_blk = first_blk; | |
617 | ||
618 | /* Is the whole lot zeroed? */ | |
619 | if (!first_blk) { | |
620 | /* Linux XFS shouldn't generate totally zeroed logs - | |
621 | * mkfs etc write a dummy unmount record to a fresh | |
622 | * log so we can store the uuid in there | |
623 | */ | |
a0fa2b67 | 624 | xfs_warn(log->l_mp, "totally zeroed log"); |
1da177e4 LT |
625 | } |
626 | ||
627 | return 0; | |
628 | } else if (error) { | |
a0fa2b67 | 629 | xfs_warn(log->l_mp, "empty log check failed"); |
1da177e4 LT |
630 | return error; |
631 | } | |
632 | ||
633 | first_blk = 0; /* get cycle # of 1st block */ | |
634 | bp = xlog_get_bp(log, 1); | |
635 | if (!bp) | |
636 | return ENOMEM; | |
076e6acb CH |
637 | |
638 | error = xlog_bread(log, 0, 1, bp, &offset); | |
639 | if (error) | |
1da177e4 | 640 | goto bp_err; |
076e6acb | 641 | |
03bea6fe | 642 | first_half_cycle = xlog_get_cycle(offset); |
1da177e4 LT |
643 | |
644 | last_blk = head_blk = log_bbnum - 1; /* get cycle # of last block */ | |
076e6acb CH |
645 | error = xlog_bread(log, last_blk, 1, bp, &offset); |
646 | if (error) | |
1da177e4 | 647 | goto bp_err; |
076e6acb | 648 | |
03bea6fe | 649 | last_half_cycle = xlog_get_cycle(offset); |
1da177e4 LT |
650 | ASSERT(last_half_cycle != 0); |
651 | ||
652 | /* | |
653 | * If the 1st half cycle number is equal to the last half cycle number, | |
654 | * then the entire log is stamped with the same cycle number. In this | |
655 | * case, head_blk can't be set to zero (which makes sense). The below | |
656 | * math doesn't work out properly with head_blk equal to zero. Instead, | |
657 | * we set it to log_bbnum which is an invalid block number, but this | |
658 | * value makes the math correct. If head_blk doesn't changed through | |
659 | * all the tests below, *head_blk is set to zero at the very end rather | |
660 | * than log_bbnum. In a sense, log_bbnum and zero are the same block | |
661 | * in a circular file. | |
662 | */ | |
663 | if (first_half_cycle == last_half_cycle) { | |
664 | /* | |
665 | * In this case we believe that the entire log should have | |
666 | * cycle number last_half_cycle. We need to scan backwards | |
667 | * from the end verifying that there are no holes still | |
668 | * containing last_half_cycle - 1. If we find such a hole, | |
669 | * then the start of that hole will be the new head. The | |
670 | * simple case looks like | |
671 | * x | x ... | x - 1 | x | |
672 | * Another case that fits this picture would be | |
673 | * x | x + 1 | x ... | x | |
c41564b5 | 674 | * In this case the head really is somewhere at the end of the |
1da177e4 LT |
675 | * log, as one of the latest writes at the beginning was |
676 | * incomplete. | |
677 | * One more case is | |
678 | * x | x + 1 | x ... | x - 1 | x | |
679 | * This is really the combination of the above two cases, and | |
680 | * the head has to end up at the start of the x-1 hole at the | |
681 | * end of the log. | |
682 | * | |
683 | * In the 256k log case, we will read from the beginning to the | |
684 | * end of the log and search for cycle numbers equal to x-1. | |
685 | * We don't worry about the x+1 blocks that we encounter, | |
686 | * because we know that they cannot be the head since the log | |
687 | * started with x. | |
688 | */ | |
689 | head_blk = log_bbnum; | |
690 | stop_on_cycle = last_half_cycle - 1; | |
691 | } else { | |
692 | /* | |
693 | * In this case we want to find the first block with cycle | |
694 | * number matching last_half_cycle. We expect the log to be | |
695 | * some variation on | |
3f943d85 | 696 | * x + 1 ... | x ... | x |
1da177e4 LT |
697 | * The first block with cycle number x (last_half_cycle) will |
698 | * be where the new head belongs. First we do a binary search | |
699 | * for the first occurrence of last_half_cycle. The binary | |
700 | * search may not be totally accurate, so then we scan back | |
701 | * from there looking for occurrences of last_half_cycle before | |
702 | * us. If that backwards scan wraps around the beginning of | |
703 | * the log, then we look for occurrences of last_half_cycle - 1 | |
704 | * at the end of the log. The cases we're looking for look | |
705 | * like | |
3f943d85 AE |
706 | * v binary search stopped here |
707 | * x + 1 ... | x | x + 1 | x ... | x | |
708 | * ^ but we want to locate this spot | |
1da177e4 | 709 | * or |
1da177e4 | 710 | * <---------> less than scan distance |
3f943d85 AE |
711 | * x + 1 ... | x ... | x - 1 | x |
712 | * ^ we want to locate this spot | |
1da177e4 LT |
713 | */ |
714 | stop_on_cycle = last_half_cycle; | |
715 | if ((error = xlog_find_cycle_start(log, bp, first_blk, | |
716 | &head_blk, last_half_cycle))) | |
717 | goto bp_err; | |
718 | } | |
719 | ||
720 | /* | |
721 | * Now validate the answer. Scan back some number of maximum possible | |
722 | * blocks and make sure each one has the expected cycle number. The | |
723 | * maximum is determined by the total possible amount of buffering | |
724 | * in the in-core log. The following number can be made tighter if | |
725 | * we actually look at the block size of the filesystem. | |
726 | */ | |
727 | num_scan_bblks = XLOG_TOTAL_REC_SHIFT(log); | |
728 | if (head_blk >= num_scan_bblks) { | |
729 | /* | |
730 | * We are guaranteed that the entire check can be performed | |
731 | * in one buffer. | |
732 | */ | |
733 | start_blk = head_blk - num_scan_bblks; | |
734 | if ((error = xlog_find_verify_cycle(log, | |
735 | start_blk, num_scan_bblks, | |
736 | stop_on_cycle, &new_blk))) | |
737 | goto bp_err; | |
738 | if (new_blk != -1) | |
739 | head_blk = new_blk; | |
740 | } else { /* need to read 2 parts of log */ | |
741 | /* | |
742 | * We are going to scan backwards in the log in two parts. | |
743 | * First we scan the physical end of the log. In this part | |
744 | * of the log, we are looking for blocks with cycle number | |
745 | * last_half_cycle - 1. | |
746 | * If we find one, then we know that the log starts there, as | |
747 | * we've found a hole that didn't get written in going around | |
748 | * the end of the physical log. The simple case for this is | |
749 | * x + 1 ... | x ... | x - 1 | x | |
750 | * <---------> less than scan distance | |
751 | * If all of the blocks at the end of the log have cycle number | |
752 | * last_half_cycle, then we check the blocks at the start of | |
753 | * the log looking for occurrences of last_half_cycle. If we | |
754 | * find one, then our current estimate for the location of the | |
755 | * first occurrence of last_half_cycle is wrong and we move | |
756 | * back to the hole we've found. This case looks like | |
757 | * x + 1 ... | x | x + 1 | x ... | |
758 | * ^ binary search stopped here | |
759 | * Another case we need to handle that only occurs in 256k | |
760 | * logs is | |
761 | * x + 1 ... | x ... | x+1 | x ... | |
762 | * ^ binary search stops here | |
763 | * In a 256k log, the scan at the end of the log will see the | |
764 | * x + 1 blocks. We need to skip past those since that is | |
765 | * certainly not the head of the log. By searching for | |
766 | * last_half_cycle-1 we accomplish that. | |
767 | */ | |
1da177e4 | 768 | ASSERT(head_blk <= INT_MAX && |
3f943d85 AE |
769 | (xfs_daddr_t) num_scan_bblks >= head_blk); |
770 | start_blk = log_bbnum - (num_scan_bblks - head_blk); | |
1da177e4 LT |
771 | if ((error = xlog_find_verify_cycle(log, start_blk, |
772 | num_scan_bblks - (int)head_blk, | |
773 | (stop_on_cycle - 1), &new_blk))) | |
774 | goto bp_err; | |
775 | if (new_blk != -1) { | |
776 | head_blk = new_blk; | |
9db127ed | 777 | goto validate_head; |
1da177e4 LT |
778 | } |
779 | ||
780 | /* | |
781 | * Scan beginning of log now. The last part of the physical | |
782 | * log is good. This scan needs to verify that it doesn't find | |
783 | * the last_half_cycle. | |
784 | */ | |
785 | start_blk = 0; | |
786 | ASSERT(head_blk <= INT_MAX); | |
787 | if ((error = xlog_find_verify_cycle(log, | |
788 | start_blk, (int)head_blk, | |
789 | stop_on_cycle, &new_blk))) | |
790 | goto bp_err; | |
791 | if (new_blk != -1) | |
792 | head_blk = new_blk; | |
793 | } | |
794 | ||
9db127ed | 795 | validate_head: |
1da177e4 LT |
796 | /* |
797 | * Now we need to make sure head_blk is not pointing to a block in | |
798 | * the middle of a log record. | |
799 | */ | |
800 | num_scan_bblks = XLOG_REC_SHIFT(log); | |
801 | if (head_blk >= num_scan_bblks) { | |
802 | start_blk = head_blk - num_scan_bblks; /* don't read head_blk */ | |
803 | ||
804 | /* start ptr at last block ptr before head_blk */ | |
805 | if ((error = xlog_find_verify_log_record(log, start_blk, | |
806 | &head_blk, 0)) == -1) { | |
807 | error = XFS_ERROR(EIO); | |
808 | goto bp_err; | |
809 | } else if (error) | |
810 | goto bp_err; | |
811 | } else { | |
812 | start_blk = 0; | |
813 | ASSERT(head_blk <= INT_MAX); | |
814 | if ((error = xlog_find_verify_log_record(log, start_blk, | |
815 | &head_blk, 0)) == -1) { | |
816 | /* We hit the beginning of the log during our search */ | |
3f943d85 | 817 | start_blk = log_bbnum - (num_scan_bblks - head_blk); |
1da177e4 LT |
818 | new_blk = log_bbnum; |
819 | ASSERT(start_blk <= INT_MAX && | |
820 | (xfs_daddr_t) log_bbnum-start_blk >= 0); | |
821 | ASSERT(head_blk <= INT_MAX); | |
822 | if ((error = xlog_find_verify_log_record(log, | |
823 | start_blk, &new_blk, | |
824 | (int)head_blk)) == -1) { | |
825 | error = XFS_ERROR(EIO); | |
826 | goto bp_err; | |
827 | } else if (error) | |
828 | goto bp_err; | |
829 | if (new_blk != log_bbnum) | |
830 | head_blk = new_blk; | |
831 | } else if (error) | |
832 | goto bp_err; | |
833 | } | |
834 | ||
835 | xlog_put_bp(bp); | |
836 | if (head_blk == log_bbnum) | |
837 | *return_head_blk = 0; | |
838 | else | |
839 | *return_head_blk = head_blk; | |
840 | /* | |
841 | * When returning here, we have a good block number. Bad block | |
842 | * means that during a previous crash, we didn't have a clean break | |
843 | * from cycle number N to cycle number N-1. In this case, we need | |
844 | * to find the first block with cycle number N-1. | |
845 | */ | |
846 | return 0; | |
847 | ||
848 | bp_err: | |
849 | xlog_put_bp(bp); | |
850 | ||
851 | if (error) | |
a0fa2b67 | 852 | xfs_warn(log->l_mp, "failed to find log head"); |
1da177e4 LT |
853 | return error; |
854 | } | |
855 | ||
856 | /* | |
857 | * Find the sync block number or the tail of the log. | |
858 | * | |
859 | * This will be the block number of the last record to have its | |
860 | * associated buffers synced to disk. Every log record header has | |
861 | * a sync lsn embedded in it. LSNs hold block numbers, so it is easy | |
862 | * to get a sync block number. The only concern is to figure out which | |
863 | * log record header to believe. | |
864 | * | |
865 | * The following algorithm uses the log record header with the largest | |
866 | * lsn. The entire log record does not need to be valid. We only care | |
867 | * that the header is valid. | |
868 | * | |
869 | * We could speed up search by using current head_blk buffer, but it is not | |
870 | * available. | |
871 | */ | |
5d77c0dc | 872 | STATIC int |
1da177e4 LT |
873 | xlog_find_tail( |
874 | xlog_t *log, | |
875 | xfs_daddr_t *head_blk, | |
65be6054 | 876 | xfs_daddr_t *tail_blk) |
1da177e4 LT |
877 | { |
878 | xlog_rec_header_t *rhead; | |
879 | xlog_op_header_t *op_head; | |
880 | xfs_caddr_t offset = NULL; | |
881 | xfs_buf_t *bp; | |
882 | int error, i, found; | |
883 | xfs_daddr_t umount_data_blk; | |
884 | xfs_daddr_t after_umount_blk; | |
885 | xfs_lsn_t tail_lsn; | |
886 | int hblks; | |
887 | ||
888 | found = 0; | |
889 | ||
890 | /* | |
891 | * Find previous log record | |
892 | */ | |
893 | if ((error = xlog_find_head(log, head_blk))) | |
894 | return error; | |
895 | ||
896 | bp = xlog_get_bp(log, 1); | |
897 | if (!bp) | |
898 | return ENOMEM; | |
899 | if (*head_blk == 0) { /* special case */ | |
076e6acb CH |
900 | error = xlog_bread(log, 0, 1, bp, &offset); |
901 | if (error) | |
9db127ed | 902 | goto done; |
076e6acb | 903 | |
03bea6fe | 904 | if (xlog_get_cycle(offset) == 0) { |
1da177e4 LT |
905 | *tail_blk = 0; |
906 | /* leave all other log inited values alone */ | |
9db127ed | 907 | goto done; |
1da177e4 LT |
908 | } |
909 | } | |
910 | ||
911 | /* | |
912 | * Search backwards looking for log record header block | |
913 | */ | |
914 | ASSERT(*head_blk < INT_MAX); | |
915 | for (i = (int)(*head_blk) - 1; i >= 0; i--) { | |
076e6acb CH |
916 | error = xlog_bread(log, i, 1, bp, &offset); |
917 | if (error) | |
9db127ed | 918 | goto done; |
076e6acb | 919 | |
69ef921b | 920 | if (*(__be32 *)offset == cpu_to_be32(XLOG_HEADER_MAGIC_NUM)) { |
1da177e4 LT |
921 | found = 1; |
922 | break; | |
923 | } | |
924 | } | |
925 | /* | |
926 | * If we haven't found the log record header block, start looking | |
927 | * again from the end of the physical log. XXXmiken: There should be | |
928 | * a check here to make sure we didn't search more than N blocks in | |
929 | * the previous code. | |
930 | */ | |
931 | if (!found) { | |
932 | for (i = log->l_logBBsize - 1; i >= (int)(*head_blk); i--) { | |
076e6acb CH |
933 | error = xlog_bread(log, i, 1, bp, &offset); |
934 | if (error) | |
9db127ed | 935 | goto done; |
076e6acb | 936 | |
69ef921b CH |
937 | if (*(__be32 *)offset == |
938 | cpu_to_be32(XLOG_HEADER_MAGIC_NUM)) { | |
1da177e4 LT |
939 | found = 2; |
940 | break; | |
941 | } | |
942 | } | |
943 | } | |
944 | if (!found) { | |
a0fa2b67 | 945 | xfs_warn(log->l_mp, "%s: couldn't find sync record", __func__); |
1da177e4 LT |
946 | ASSERT(0); |
947 | return XFS_ERROR(EIO); | |
948 | } | |
949 | ||
950 | /* find blk_no of tail of log */ | |
951 | rhead = (xlog_rec_header_t *)offset; | |
b53e675d | 952 | *tail_blk = BLOCK_LSN(be64_to_cpu(rhead->h_tail_lsn)); |
1da177e4 LT |
953 | |
954 | /* | |
955 | * Reset log values according to the state of the log when we | |
956 | * crashed. In the case where head_blk == 0, we bump curr_cycle | |
957 | * one because the next write starts a new cycle rather than | |
958 | * continuing the cycle of the last good log record. At this | |
959 | * point we have guaranteed that all partial log records have been | |
960 | * accounted for. Therefore, we know that the last good log record | |
961 | * written was complete and ended exactly on the end boundary | |
962 | * of the physical log. | |
963 | */ | |
964 | log->l_prev_block = i; | |
965 | log->l_curr_block = (int)*head_blk; | |
b53e675d | 966 | log->l_curr_cycle = be32_to_cpu(rhead->h_cycle); |
1da177e4 LT |
967 | if (found == 2) |
968 | log->l_curr_cycle++; | |
1c3cb9ec | 969 | atomic64_set(&log->l_tail_lsn, be64_to_cpu(rhead->h_tail_lsn)); |
84f3c683 | 970 | atomic64_set(&log->l_last_sync_lsn, be64_to_cpu(rhead->h_lsn)); |
28496968 | 971 | xlog_assign_grant_head(&log->l_reserve_head.grant, log->l_curr_cycle, |
a69ed03c | 972 | BBTOB(log->l_curr_block)); |
28496968 | 973 | xlog_assign_grant_head(&log->l_write_head.grant, log->l_curr_cycle, |
a69ed03c | 974 | BBTOB(log->l_curr_block)); |
1da177e4 LT |
975 | |
976 | /* | |
977 | * Look for unmount record. If we find it, then we know there | |
978 | * was a clean unmount. Since 'i' could be the last block in | |
979 | * the physical log, we convert to a log block before comparing | |
980 | * to the head_blk. | |
981 | * | |
982 | * Save the current tail lsn to use to pass to | |
983 | * xlog_clear_stale_blocks() below. We won't want to clear the | |
984 | * unmount record if there is one, so we pass the lsn of the | |
985 | * unmount record rather than the block after it. | |
986 | */ | |
62118709 | 987 | if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { |
b53e675d CH |
988 | int h_size = be32_to_cpu(rhead->h_size); |
989 | int h_version = be32_to_cpu(rhead->h_version); | |
1da177e4 LT |
990 | |
991 | if ((h_version & XLOG_VERSION_2) && | |
992 | (h_size > XLOG_HEADER_CYCLE_SIZE)) { | |
993 | hblks = h_size / XLOG_HEADER_CYCLE_SIZE; | |
994 | if (h_size % XLOG_HEADER_CYCLE_SIZE) | |
995 | hblks++; | |
996 | } else { | |
997 | hblks = 1; | |
998 | } | |
999 | } else { | |
1000 | hblks = 1; | |
1001 | } | |
1002 | after_umount_blk = (i + hblks + (int) | |
b53e675d | 1003 | BTOBB(be32_to_cpu(rhead->h_len))) % log->l_logBBsize; |
1c3cb9ec | 1004 | tail_lsn = atomic64_read(&log->l_tail_lsn); |
1da177e4 | 1005 | if (*head_blk == after_umount_blk && |
b53e675d | 1006 | be32_to_cpu(rhead->h_num_logops) == 1) { |
1da177e4 | 1007 | umount_data_blk = (i + hblks) % log->l_logBBsize; |
076e6acb CH |
1008 | error = xlog_bread(log, umount_data_blk, 1, bp, &offset); |
1009 | if (error) | |
9db127ed | 1010 | goto done; |
076e6acb | 1011 | |
1da177e4 LT |
1012 | op_head = (xlog_op_header_t *)offset; |
1013 | if (op_head->oh_flags & XLOG_UNMOUNT_TRANS) { | |
1014 | /* | |
1015 | * Set tail and last sync so that newly written | |
1016 | * log records will point recovery to after the | |
1017 | * current unmount record. | |
1018 | */ | |
1c3cb9ec DC |
1019 | xlog_assign_atomic_lsn(&log->l_tail_lsn, |
1020 | log->l_curr_cycle, after_umount_blk); | |
1021 | xlog_assign_atomic_lsn(&log->l_last_sync_lsn, | |
1022 | log->l_curr_cycle, after_umount_blk); | |
1da177e4 | 1023 | *tail_blk = after_umount_blk; |
92821e2b DC |
1024 | |
1025 | /* | |
1026 | * Note that the unmount was clean. If the unmount | |
1027 | * was not clean, we need to know this to rebuild the | |
1028 | * superblock counters from the perag headers if we | |
1029 | * have a filesystem using non-persistent counters. | |
1030 | */ | |
1031 | log->l_mp->m_flags |= XFS_MOUNT_WAS_CLEAN; | |
1da177e4 LT |
1032 | } |
1033 | } | |
1034 | ||
1035 | /* | |
1036 | * Make sure that there are no blocks in front of the head | |
1037 | * with the same cycle number as the head. This can happen | |
1038 | * because we allow multiple outstanding log writes concurrently, | |
1039 | * and the later writes might make it out before earlier ones. | |
1040 | * | |
1041 | * We use the lsn from before modifying it so that we'll never | |
1042 | * overwrite the unmount record after a clean unmount. | |
1043 | * | |
1044 | * Do this only if we are going to recover the filesystem | |
1045 | * | |
1046 | * NOTE: This used to say "if (!readonly)" | |
1047 | * However on Linux, we can & do recover a read-only filesystem. | |
1048 | * We only skip recovery if NORECOVERY is specified on mount, | |
1049 | * in which case we would not be here. | |
1050 | * | |
1051 | * But... if the -device- itself is readonly, just skip this. | |
1052 | * We can't recover this device anyway, so it won't matter. | |
1053 | */ | |
9db127ed | 1054 | if (!xfs_readonly_buftarg(log->l_mp->m_logdev_targp)) |
1da177e4 | 1055 | error = xlog_clear_stale_blocks(log, tail_lsn); |
1da177e4 | 1056 | |
9db127ed | 1057 | done: |
1da177e4 LT |
1058 | xlog_put_bp(bp); |
1059 | ||
1060 | if (error) | |
a0fa2b67 | 1061 | xfs_warn(log->l_mp, "failed to locate log tail"); |
1da177e4 LT |
1062 | return error; |
1063 | } | |
1064 | ||
1065 | /* | |
1066 | * Is the log zeroed at all? | |
1067 | * | |
1068 | * The last binary search should be changed to perform an X block read | |
1069 | * once X becomes small enough. You can then search linearly through | |
1070 | * the X blocks. This will cut down on the number of reads we need to do. | |
1071 | * | |
1072 | * If the log is partially zeroed, this routine will pass back the blkno | |
1073 | * of the first block with cycle number 0. It won't have a complete LR | |
1074 | * preceding it. | |
1075 | * | |
1076 | * Return: | |
1077 | * 0 => the log is completely written to | |
1078 | * -1 => use *blk_no as the first block of the log | |
1079 | * >0 => error has occurred | |
1080 | */ | |
a8272ce0 | 1081 | STATIC int |
1da177e4 LT |
1082 | xlog_find_zeroed( |
1083 | xlog_t *log, | |
1084 | xfs_daddr_t *blk_no) | |
1085 | { | |
1086 | xfs_buf_t *bp; | |
1087 | xfs_caddr_t offset; | |
1088 | uint first_cycle, last_cycle; | |
1089 | xfs_daddr_t new_blk, last_blk, start_blk; | |
1090 | xfs_daddr_t num_scan_bblks; | |
1091 | int error, log_bbnum = log->l_logBBsize; | |
1092 | ||
6fdf8ccc NS |
1093 | *blk_no = 0; |
1094 | ||
1da177e4 LT |
1095 | /* check totally zeroed log */ |
1096 | bp = xlog_get_bp(log, 1); | |
1097 | if (!bp) | |
1098 | return ENOMEM; | |
076e6acb CH |
1099 | error = xlog_bread(log, 0, 1, bp, &offset); |
1100 | if (error) | |
1da177e4 | 1101 | goto bp_err; |
076e6acb | 1102 | |
03bea6fe | 1103 | first_cycle = xlog_get_cycle(offset); |
1da177e4 LT |
1104 | if (first_cycle == 0) { /* completely zeroed log */ |
1105 | *blk_no = 0; | |
1106 | xlog_put_bp(bp); | |
1107 | return -1; | |
1108 | } | |
1109 | ||
1110 | /* check partially zeroed log */ | |
076e6acb CH |
1111 | error = xlog_bread(log, log_bbnum-1, 1, bp, &offset); |
1112 | if (error) | |
1da177e4 | 1113 | goto bp_err; |
076e6acb | 1114 | |
03bea6fe | 1115 | last_cycle = xlog_get_cycle(offset); |
1da177e4 LT |
1116 | if (last_cycle != 0) { /* log completely written to */ |
1117 | xlog_put_bp(bp); | |
1118 | return 0; | |
1119 | } else if (first_cycle != 1) { | |
1120 | /* | |
1121 | * If the cycle of the last block is zero, the cycle of | |
1122 | * the first block must be 1. If it's not, maybe we're | |
1123 | * not looking at a log... Bail out. | |
1124 | */ | |
a0fa2b67 DC |
1125 | xfs_warn(log->l_mp, |
1126 | "Log inconsistent or not a log (last==0, first!=1)"); | |
1da177e4 LT |
1127 | return XFS_ERROR(EINVAL); |
1128 | } | |
1129 | ||
1130 | /* we have a partially zeroed log */ | |
1131 | last_blk = log_bbnum-1; | |
1132 | if ((error = xlog_find_cycle_start(log, bp, 0, &last_blk, 0))) | |
1133 | goto bp_err; | |
1134 | ||
1135 | /* | |
1136 | * Validate the answer. Because there is no way to guarantee that | |
1137 | * the entire log is made up of log records which are the same size, | |
1138 | * we scan over the defined maximum blocks. At this point, the maximum | |
1139 | * is not chosen to mean anything special. XXXmiken | |
1140 | */ | |
1141 | num_scan_bblks = XLOG_TOTAL_REC_SHIFT(log); | |
1142 | ASSERT(num_scan_bblks <= INT_MAX); | |
1143 | ||
1144 | if (last_blk < num_scan_bblks) | |
1145 | num_scan_bblks = last_blk; | |
1146 | start_blk = last_blk - num_scan_bblks; | |
1147 | ||
1148 | /* | |
1149 | * We search for any instances of cycle number 0 that occur before | |
1150 | * our current estimate of the head. What we're trying to detect is | |
1151 | * 1 ... | 0 | 1 | 0... | |
1152 | * ^ binary search ends here | |
1153 | */ | |
1154 | if ((error = xlog_find_verify_cycle(log, start_blk, | |
1155 | (int)num_scan_bblks, 0, &new_blk))) | |
1156 | goto bp_err; | |
1157 | if (new_blk != -1) | |
1158 | last_blk = new_blk; | |
1159 | ||
1160 | /* | |
1161 | * Potentially backup over partial log record write. We don't need | |
1162 | * to search the end of the log because we know it is zero. | |
1163 | */ | |
1164 | if ((error = xlog_find_verify_log_record(log, start_blk, | |
1165 | &last_blk, 0)) == -1) { | |
1166 | error = XFS_ERROR(EIO); | |
1167 | goto bp_err; | |
1168 | } else if (error) | |
1169 | goto bp_err; | |
1170 | ||
1171 | *blk_no = last_blk; | |
1172 | bp_err: | |
1173 | xlog_put_bp(bp); | |
1174 | if (error) | |
1175 | return error; | |
1176 | return -1; | |
1177 | } | |
1178 | ||
1179 | /* | |
1180 | * These are simple subroutines used by xlog_clear_stale_blocks() below | |
1181 | * to initialize a buffer full of empty log record headers and write | |
1182 | * them into the log. | |
1183 | */ | |
1184 | STATIC void | |
1185 | xlog_add_record( | |
1186 | xlog_t *log, | |
1187 | xfs_caddr_t buf, | |
1188 | int cycle, | |
1189 | int block, | |
1190 | int tail_cycle, | |
1191 | int tail_block) | |
1192 | { | |
1193 | xlog_rec_header_t *recp = (xlog_rec_header_t *)buf; | |
1194 | ||
1195 | memset(buf, 0, BBSIZE); | |
b53e675d CH |
1196 | recp->h_magicno = cpu_to_be32(XLOG_HEADER_MAGIC_NUM); |
1197 | recp->h_cycle = cpu_to_be32(cycle); | |
1198 | recp->h_version = cpu_to_be32( | |
62118709 | 1199 | xfs_sb_version_haslogv2(&log->l_mp->m_sb) ? 2 : 1); |
b53e675d CH |
1200 | recp->h_lsn = cpu_to_be64(xlog_assign_lsn(cycle, block)); |
1201 | recp->h_tail_lsn = cpu_to_be64(xlog_assign_lsn(tail_cycle, tail_block)); | |
1202 | recp->h_fmt = cpu_to_be32(XLOG_FMT); | |
1da177e4 LT |
1203 | memcpy(&recp->h_fs_uuid, &log->l_mp->m_sb.sb_uuid, sizeof(uuid_t)); |
1204 | } | |
1205 | ||
1206 | STATIC int | |
1207 | xlog_write_log_records( | |
1208 | xlog_t *log, | |
1209 | int cycle, | |
1210 | int start_block, | |
1211 | int blocks, | |
1212 | int tail_cycle, | |
1213 | int tail_block) | |
1214 | { | |
1215 | xfs_caddr_t offset; | |
1216 | xfs_buf_t *bp; | |
1217 | int balign, ealign; | |
69ce58f0 | 1218 | int sectbb = log->l_sectBBsize; |
1da177e4 LT |
1219 | int end_block = start_block + blocks; |
1220 | int bufblks; | |
1221 | int error = 0; | |
1222 | int i, j = 0; | |
1223 | ||
6881a229 AE |
1224 | /* |
1225 | * Greedily allocate a buffer big enough to handle the full | |
1226 | * range of basic blocks to be written. If that fails, try | |
1227 | * a smaller size. We need to be able to write at least a | |
1228 | * log sector, or we're out of luck. | |
1229 | */ | |
1da177e4 | 1230 | bufblks = 1 << ffs(blocks); |
81158e0c DC |
1231 | while (bufblks > log->l_logBBsize) |
1232 | bufblks >>= 1; | |
1da177e4 LT |
1233 | while (!(bp = xlog_get_bp(log, bufblks))) { |
1234 | bufblks >>= 1; | |
69ce58f0 | 1235 | if (bufblks < sectbb) |
1da177e4 LT |
1236 | return ENOMEM; |
1237 | } | |
1238 | ||
1239 | /* We may need to do a read at the start to fill in part of | |
1240 | * the buffer in the starting sector not covered by the first | |
1241 | * write below. | |
1242 | */ | |
5c17f533 | 1243 | balign = round_down(start_block, sectbb); |
1da177e4 | 1244 | if (balign != start_block) { |
076e6acb CH |
1245 | error = xlog_bread_noalign(log, start_block, 1, bp); |
1246 | if (error) | |
1247 | goto out_put_bp; | |
1248 | ||
1da177e4 LT |
1249 | j = start_block - balign; |
1250 | } | |
1251 | ||
1252 | for (i = start_block; i < end_block; i += bufblks) { | |
1253 | int bcount, endcount; | |
1254 | ||
1255 | bcount = min(bufblks, end_block - start_block); | |
1256 | endcount = bcount - j; | |
1257 | ||
1258 | /* We may need to do a read at the end to fill in part of | |
1259 | * the buffer in the final sector not covered by the write. | |
1260 | * If this is the same sector as the above read, skip it. | |
1261 | */ | |
5c17f533 | 1262 | ealign = round_down(end_block, sectbb); |
1da177e4 | 1263 | if (j == 0 && (start_block + endcount > ealign)) { |
62926044 | 1264 | offset = bp->b_addr + BBTOB(ealign - start_block); |
44396476 DC |
1265 | error = xlog_bread_offset(log, ealign, sectbb, |
1266 | bp, offset); | |
076e6acb CH |
1267 | if (error) |
1268 | break; | |
1269 | ||
1da177e4 LT |
1270 | } |
1271 | ||
1272 | offset = xlog_align(log, start_block, endcount, bp); | |
1273 | for (; j < endcount; j++) { | |
1274 | xlog_add_record(log, offset, cycle, i+j, | |
1275 | tail_cycle, tail_block); | |
1276 | offset += BBSIZE; | |
1277 | } | |
1278 | error = xlog_bwrite(log, start_block, endcount, bp); | |
1279 | if (error) | |
1280 | break; | |
1281 | start_block += endcount; | |
1282 | j = 0; | |
1283 | } | |
076e6acb CH |
1284 | |
1285 | out_put_bp: | |
1da177e4 LT |
1286 | xlog_put_bp(bp); |
1287 | return error; | |
1288 | } | |
1289 | ||
1290 | /* | |
1291 | * This routine is called to blow away any incomplete log writes out | |
1292 | * in front of the log head. We do this so that we won't become confused | |
1293 | * if we come up, write only a little bit more, and then crash again. | |
1294 | * If we leave the partial log records out there, this situation could | |
1295 | * cause us to think those partial writes are valid blocks since they | |
1296 | * have the current cycle number. We get rid of them by overwriting them | |
1297 | * with empty log records with the old cycle number rather than the | |
1298 | * current one. | |
1299 | * | |
1300 | * The tail lsn is passed in rather than taken from | |
1301 | * the log so that we will not write over the unmount record after a | |
1302 | * clean unmount in a 512 block log. Doing so would leave the log without | |
1303 | * any valid log records in it until a new one was written. If we crashed | |
1304 | * during that time we would not be able to recover. | |
1305 | */ | |
1306 | STATIC int | |
1307 | xlog_clear_stale_blocks( | |
1308 | xlog_t *log, | |
1309 | xfs_lsn_t tail_lsn) | |
1310 | { | |
1311 | int tail_cycle, head_cycle; | |
1312 | int tail_block, head_block; | |
1313 | int tail_distance, max_distance; | |
1314 | int distance; | |
1315 | int error; | |
1316 | ||
1317 | tail_cycle = CYCLE_LSN(tail_lsn); | |
1318 | tail_block = BLOCK_LSN(tail_lsn); | |
1319 | head_cycle = log->l_curr_cycle; | |
1320 | head_block = log->l_curr_block; | |
1321 | ||
1322 | /* | |
1323 | * Figure out the distance between the new head of the log | |
1324 | * and the tail. We want to write over any blocks beyond the | |
1325 | * head that we may have written just before the crash, but | |
1326 | * we don't want to overwrite the tail of the log. | |
1327 | */ | |
1328 | if (head_cycle == tail_cycle) { | |
1329 | /* | |
1330 | * The tail is behind the head in the physical log, | |
1331 | * so the distance from the head to the tail is the | |
1332 | * distance from the head to the end of the log plus | |
1333 | * the distance from the beginning of the log to the | |
1334 | * tail. | |
1335 | */ | |
1336 | if (unlikely(head_block < tail_block || head_block >= log->l_logBBsize)) { | |
1337 | XFS_ERROR_REPORT("xlog_clear_stale_blocks(1)", | |
1338 | XFS_ERRLEVEL_LOW, log->l_mp); | |
1339 | return XFS_ERROR(EFSCORRUPTED); | |
1340 | } | |
1341 | tail_distance = tail_block + (log->l_logBBsize - head_block); | |
1342 | } else { | |
1343 | /* | |
1344 | * The head is behind the tail in the physical log, | |
1345 | * so the distance from the head to the tail is just | |
1346 | * the tail block minus the head block. | |
1347 | */ | |
1348 | if (unlikely(head_block >= tail_block || head_cycle != (tail_cycle + 1))){ | |
1349 | XFS_ERROR_REPORT("xlog_clear_stale_blocks(2)", | |
1350 | XFS_ERRLEVEL_LOW, log->l_mp); | |
1351 | return XFS_ERROR(EFSCORRUPTED); | |
1352 | } | |
1353 | tail_distance = tail_block - head_block; | |
1354 | } | |
1355 | ||
1356 | /* | |
1357 | * If the head is right up against the tail, we can't clear | |
1358 | * anything. | |
1359 | */ | |
1360 | if (tail_distance <= 0) { | |
1361 | ASSERT(tail_distance == 0); | |
1362 | return 0; | |
1363 | } | |
1364 | ||
1365 | max_distance = XLOG_TOTAL_REC_SHIFT(log); | |
1366 | /* | |
1367 | * Take the smaller of the maximum amount of outstanding I/O | |
1368 | * we could have and the distance to the tail to clear out. | |
1369 | * We take the smaller so that we don't overwrite the tail and | |
1370 | * we don't waste all day writing from the head to the tail | |
1371 | * for no reason. | |
1372 | */ | |
1373 | max_distance = MIN(max_distance, tail_distance); | |
1374 | ||
1375 | if ((head_block + max_distance) <= log->l_logBBsize) { | |
1376 | /* | |
1377 | * We can stomp all the blocks we need to without | |
1378 | * wrapping around the end of the log. Just do it | |
1379 | * in a single write. Use the cycle number of the | |
1380 | * current cycle minus one so that the log will look like: | |
1381 | * n ... | n - 1 ... | |
1382 | */ | |
1383 | error = xlog_write_log_records(log, (head_cycle - 1), | |
1384 | head_block, max_distance, tail_cycle, | |
1385 | tail_block); | |
1386 | if (error) | |
1387 | return error; | |
1388 | } else { | |
1389 | /* | |
1390 | * We need to wrap around the end of the physical log in | |
1391 | * order to clear all the blocks. Do it in two separate | |
1392 | * I/Os. The first write should be from the head to the | |
1393 | * end of the physical log, and it should use the current | |
1394 | * cycle number minus one just like above. | |
1395 | */ | |
1396 | distance = log->l_logBBsize - head_block; | |
1397 | error = xlog_write_log_records(log, (head_cycle - 1), | |
1398 | head_block, distance, tail_cycle, | |
1399 | tail_block); | |
1400 | ||
1401 | if (error) | |
1402 | return error; | |
1403 | ||
1404 | /* | |
1405 | * Now write the blocks at the start of the physical log. | |
1406 | * This writes the remainder of the blocks we want to clear. | |
1407 | * It uses the current cycle number since we're now on the | |
1408 | * same cycle as the head so that we get: | |
1409 | * n ... n ... | n - 1 ... | |
1410 | * ^^^^^ blocks we're writing | |
1411 | */ | |
1412 | distance = max_distance - (log->l_logBBsize - head_block); | |
1413 | error = xlog_write_log_records(log, head_cycle, 0, distance, | |
1414 | tail_cycle, tail_block); | |
1415 | if (error) | |
1416 | return error; | |
1417 | } | |
1418 | ||
1419 | return 0; | |
1420 | } | |
1421 | ||
1422 | /****************************************************************************** | |
1423 | * | |
1424 | * Log recover routines | |
1425 | * | |
1426 | ****************************************************************************** | |
1427 | */ | |
1428 | ||
1429 | STATIC xlog_recover_t * | |
1430 | xlog_recover_find_tid( | |
f0a76953 | 1431 | struct hlist_head *head, |
1da177e4 LT |
1432 | xlog_tid_t tid) |
1433 | { | |
f0a76953 DC |
1434 | xlog_recover_t *trans; |
1435 | struct hlist_node *n; | |
1da177e4 | 1436 | |
f0a76953 DC |
1437 | hlist_for_each_entry(trans, n, head, r_list) { |
1438 | if (trans->r_log_tid == tid) | |
1439 | return trans; | |
1da177e4 | 1440 | } |
f0a76953 | 1441 | return NULL; |
1da177e4 LT |
1442 | } |
1443 | ||
1444 | STATIC void | |
f0a76953 DC |
1445 | xlog_recover_new_tid( |
1446 | struct hlist_head *head, | |
1447 | xlog_tid_t tid, | |
1448 | xfs_lsn_t lsn) | |
1da177e4 | 1449 | { |
f0a76953 DC |
1450 | xlog_recover_t *trans; |
1451 | ||
1452 | trans = kmem_zalloc(sizeof(xlog_recover_t), KM_SLEEP); | |
1453 | trans->r_log_tid = tid; | |
1454 | trans->r_lsn = lsn; | |
1455 | INIT_LIST_HEAD(&trans->r_itemq); | |
1456 | ||
1457 | INIT_HLIST_NODE(&trans->r_list); | |
1458 | hlist_add_head(&trans->r_list, head); | |
1da177e4 LT |
1459 | } |
1460 | ||
1461 | STATIC void | |
1462 | xlog_recover_add_item( | |
f0a76953 | 1463 | struct list_head *head) |
1da177e4 LT |
1464 | { |
1465 | xlog_recover_item_t *item; | |
1466 | ||
1467 | item = kmem_zalloc(sizeof(xlog_recover_item_t), KM_SLEEP); | |
f0a76953 DC |
1468 | INIT_LIST_HEAD(&item->ri_list); |
1469 | list_add_tail(&item->ri_list, head); | |
1da177e4 LT |
1470 | } |
1471 | ||
1472 | STATIC int | |
1473 | xlog_recover_add_to_cont_trans( | |
f7bdf03a MT |
1474 | struct xlog *log, |
1475 | struct xlog_recover *trans, | |
1da177e4 LT |
1476 | xfs_caddr_t dp, |
1477 | int len) | |
1478 | { | |
1479 | xlog_recover_item_t *item; | |
1480 | xfs_caddr_t ptr, old_ptr; | |
1481 | int old_len; | |
1482 | ||
f0a76953 | 1483 | if (list_empty(&trans->r_itemq)) { |
1da177e4 LT |
1484 | /* finish copying rest of trans header */ |
1485 | xlog_recover_add_item(&trans->r_itemq); | |
1486 | ptr = (xfs_caddr_t) &trans->r_theader + | |
1487 | sizeof(xfs_trans_header_t) - len; | |
1488 | memcpy(ptr, dp, len); /* d, s, l */ | |
1489 | return 0; | |
1490 | } | |
f0a76953 DC |
1491 | /* take the tail entry */ |
1492 | item = list_entry(trans->r_itemq.prev, xlog_recover_item_t, ri_list); | |
1da177e4 LT |
1493 | |
1494 | old_ptr = item->ri_buf[item->ri_cnt-1].i_addr; | |
1495 | old_len = item->ri_buf[item->ri_cnt-1].i_len; | |
1496 | ||
45053603 | 1497 | ptr = kmem_realloc(old_ptr, len+old_len, old_len, KM_SLEEP); |
1da177e4 LT |
1498 | memcpy(&ptr[old_len], dp, len); /* d, s, l */ |
1499 | item->ri_buf[item->ri_cnt-1].i_len += len; | |
1500 | item->ri_buf[item->ri_cnt-1].i_addr = ptr; | |
9abbc539 | 1501 | trace_xfs_log_recover_item_add_cont(log, trans, item, 0); |
1da177e4 LT |
1502 | return 0; |
1503 | } | |
1504 | ||
1505 | /* | |
1506 | * The next region to add is the start of a new region. It could be | |
1507 | * a whole region or it could be the first part of a new region. Because | |
1508 | * of this, the assumption here is that the type and size fields of all | |
1509 | * format structures fit into the first 32 bits of the structure. | |
1510 | * | |
1511 | * This works because all regions must be 32 bit aligned. Therefore, we | |
1512 | * either have both fields or we have neither field. In the case we have | |
1513 | * neither field, the data part of the region is zero length. We only have | |
1514 | * a log_op_header and can throw away the header since a new one will appear | |
1515 | * later. If we have at least 4 bytes, then we can determine how many regions | |
1516 | * will appear in the current log item. | |
1517 | */ | |
1518 | STATIC int | |
1519 | xlog_recover_add_to_trans( | |
f7bdf03a MT |
1520 | struct xlog *log, |
1521 | struct xlog_recover *trans, | |
1da177e4 LT |
1522 | xfs_caddr_t dp, |
1523 | int len) | |
1524 | { | |
1525 | xfs_inode_log_format_t *in_f; /* any will do */ | |
1526 | xlog_recover_item_t *item; | |
1527 | xfs_caddr_t ptr; | |
1528 | ||
1529 | if (!len) | |
1530 | return 0; | |
f0a76953 | 1531 | if (list_empty(&trans->r_itemq)) { |
5a792c45 DC |
1532 | /* we need to catch log corruptions here */ |
1533 | if (*(uint *)dp != XFS_TRANS_HEADER_MAGIC) { | |
a0fa2b67 DC |
1534 | xfs_warn(log->l_mp, "%s: bad header magic number", |
1535 | __func__); | |
5a792c45 DC |
1536 | ASSERT(0); |
1537 | return XFS_ERROR(EIO); | |
1538 | } | |
1da177e4 LT |
1539 | if (len == sizeof(xfs_trans_header_t)) |
1540 | xlog_recover_add_item(&trans->r_itemq); | |
1541 | memcpy(&trans->r_theader, dp, len); /* d, s, l */ | |
1542 | return 0; | |
1543 | } | |
1544 | ||
1545 | ptr = kmem_alloc(len, KM_SLEEP); | |
1546 | memcpy(ptr, dp, len); | |
1547 | in_f = (xfs_inode_log_format_t *)ptr; | |
1548 | ||
f0a76953 DC |
1549 | /* take the tail entry */ |
1550 | item = list_entry(trans->r_itemq.prev, xlog_recover_item_t, ri_list); | |
1551 | if (item->ri_total != 0 && | |
1552 | item->ri_total == item->ri_cnt) { | |
1553 | /* tail item is in use, get a new one */ | |
1da177e4 | 1554 | xlog_recover_add_item(&trans->r_itemq); |
f0a76953 DC |
1555 | item = list_entry(trans->r_itemq.prev, |
1556 | xlog_recover_item_t, ri_list); | |
1da177e4 | 1557 | } |
1da177e4 LT |
1558 | |
1559 | if (item->ri_total == 0) { /* first region to be added */ | |
e8fa6b48 CH |
1560 | if (in_f->ilf_size == 0 || |
1561 | in_f->ilf_size > XLOG_MAX_REGIONS_IN_ITEM) { | |
a0fa2b67 DC |
1562 | xfs_warn(log->l_mp, |
1563 | "bad number of regions (%d) in inode log format", | |
e8fa6b48 CH |
1564 | in_f->ilf_size); |
1565 | ASSERT(0); | |
1566 | return XFS_ERROR(EIO); | |
1567 | } | |
1568 | ||
1569 | item->ri_total = in_f->ilf_size; | |
1570 | item->ri_buf = | |
1571 | kmem_zalloc(item->ri_total * sizeof(xfs_log_iovec_t), | |
1572 | KM_SLEEP); | |
1da177e4 LT |
1573 | } |
1574 | ASSERT(item->ri_total > item->ri_cnt); | |
1575 | /* Description region is ri_buf[0] */ | |
1576 | item->ri_buf[item->ri_cnt].i_addr = ptr; | |
1577 | item->ri_buf[item->ri_cnt].i_len = len; | |
1578 | item->ri_cnt++; | |
9abbc539 | 1579 | trace_xfs_log_recover_item_add(log, trans, item, 0); |
1da177e4 LT |
1580 | return 0; |
1581 | } | |
1582 | ||
f0a76953 DC |
1583 | /* |
1584 | * Sort the log items in the transaction. Cancelled buffers need | |
1585 | * to be put first so they are processed before any items that might | |
1586 | * modify the buffers. If they are cancelled, then the modifications | |
1587 | * don't need to be replayed. | |
1588 | */ | |
1da177e4 LT |
1589 | STATIC int |
1590 | xlog_recover_reorder_trans( | |
f7bdf03a MT |
1591 | struct xlog *log, |
1592 | struct xlog_recover *trans, | |
9abbc539 | 1593 | int pass) |
1da177e4 | 1594 | { |
f0a76953 DC |
1595 | xlog_recover_item_t *item, *n; |
1596 | LIST_HEAD(sort_list); | |
1597 | ||
1598 | list_splice_init(&trans->r_itemq, &sort_list); | |
1599 | list_for_each_entry_safe(item, n, &sort_list, ri_list) { | |
4e0d5f92 | 1600 | xfs_buf_log_format_t *buf_f = item->ri_buf[0].i_addr; |
1da177e4 | 1601 | |
f0a76953 | 1602 | switch (ITEM_TYPE(item)) { |
1da177e4 | 1603 | case XFS_LI_BUF: |
c1155410 | 1604 | if (!(buf_f->blf_flags & XFS_BLF_CANCEL)) { |
9abbc539 DC |
1605 | trace_xfs_log_recover_item_reorder_head(log, |
1606 | trans, item, pass); | |
f0a76953 | 1607 | list_move(&item->ri_list, &trans->r_itemq); |
1da177e4 LT |
1608 | break; |
1609 | } | |
1610 | case XFS_LI_INODE: | |
1da177e4 LT |
1611 | case XFS_LI_DQUOT: |
1612 | case XFS_LI_QUOTAOFF: | |
1613 | case XFS_LI_EFD: | |
1614 | case XFS_LI_EFI: | |
9abbc539 DC |
1615 | trace_xfs_log_recover_item_reorder_tail(log, |
1616 | trans, item, pass); | |
f0a76953 | 1617 | list_move_tail(&item->ri_list, &trans->r_itemq); |
1da177e4 LT |
1618 | break; |
1619 | default: | |
a0fa2b67 DC |
1620 | xfs_warn(log->l_mp, |
1621 | "%s: unrecognized type of log operation", | |
1622 | __func__); | |
1da177e4 LT |
1623 | ASSERT(0); |
1624 | return XFS_ERROR(EIO); | |
1625 | } | |
f0a76953 DC |
1626 | } |
1627 | ASSERT(list_empty(&sort_list)); | |
1da177e4 LT |
1628 | return 0; |
1629 | } | |
1630 | ||
1631 | /* | |
1632 | * Build up the table of buf cancel records so that we don't replay | |
1633 | * cancelled data in the second pass. For buffer records that are | |
1634 | * not cancel records, there is nothing to do here so we just return. | |
1635 | * | |
1636 | * If we get a cancel record which is already in the table, this indicates | |
1637 | * that the buffer was cancelled multiple times. In order to ensure | |
1638 | * that during pass 2 we keep the record in the table until we reach its | |
1639 | * last occurrence in the log, we keep a reference count in the cancel | |
1640 | * record in the table to tell us how many times we expect to see this | |
1641 | * record during the second pass. | |
1642 | */ | |
c9f71f5f CH |
1643 | STATIC int |
1644 | xlog_recover_buffer_pass1( | |
f7bdf03a MT |
1645 | struct xlog *log, |
1646 | struct xlog_recover_item *item) | |
1da177e4 | 1647 | { |
c9f71f5f | 1648 | xfs_buf_log_format_t *buf_f = item->ri_buf[0].i_addr; |
d5689eaa CH |
1649 | struct list_head *bucket; |
1650 | struct xfs_buf_cancel *bcp; | |
1da177e4 LT |
1651 | |
1652 | /* | |
1653 | * If this isn't a cancel buffer item, then just return. | |
1654 | */ | |
e2714bf8 | 1655 | if (!(buf_f->blf_flags & XFS_BLF_CANCEL)) { |
9abbc539 | 1656 | trace_xfs_log_recover_buf_not_cancel(log, buf_f); |
c9f71f5f | 1657 | return 0; |
9abbc539 | 1658 | } |
1da177e4 LT |
1659 | |
1660 | /* | |
d5689eaa CH |
1661 | * Insert an xfs_buf_cancel record into the hash table of them. |
1662 | * If there is already an identical record, bump its reference count. | |
1da177e4 | 1663 | */ |
d5689eaa CH |
1664 | bucket = XLOG_BUF_CANCEL_BUCKET(log, buf_f->blf_blkno); |
1665 | list_for_each_entry(bcp, bucket, bc_list) { | |
1666 | if (bcp->bc_blkno == buf_f->blf_blkno && | |
1667 | bcp->bc_len == buf_f->blf_len) { | |
1668 | bcp->bc_refcount++; | |
9abbc539 | 1669 | trace_xfs_log_recover_buf_cancel_ref_inc(log, buf_f); |
c9f71f5f | 1670 | return 0; |
1da177e4 | 1671 | } |
d5689eaa CH |
1672 | } |
1673 | ||
1674 | bcp = kmem_alloc(sizeof(struct xfs_buf_cancel), KM_SLEEP); | |
1675 | bcp->bc_blkno = buf_f->blf_blkno; | |
1676 | bcp->bc_len = buf_f->blf_len; | |
1da177e4 | 1677 | bcp->bc_refcount = 1; |
d5689eaa CH |
1678 | list_add_tail(&bcp->bc_list, bucket); |
1679 | ||
9abbc539 | 1680 | trace_xfs_log_recover_buf_cancel_add(log, buf_f); |
c9f71f5f | 1681 | return 0; |
1da177e4 LT |
1682 | } |
1683 | ||
1684 | /* | |
1685 | * Check to see whether the buffer being recovered has a corresponding | |
1686 | * entry in the buffer cancel record table. If it does then return 1 | |
1687 | * so that it will be cancelled, otherwise return 0. If the buffer is | |
c1155410 | 1688 | * actually a buffer cancel item (XFS_BLF_CANCEL is set), then decrement |
1da177e4 LT |
1689 | * the refcount on the entry in the table and remove it from the table |
1690 | * if this is the last reference. | |
1691 | * | |
1692 | * We remove the cancel record from the table when we encounter its | |
1693 | * last occurrence in the log so that if the same buffer is re-used | |
1694 | * again after its last cancellation we actually replay the changes | |
1695 | * made at that point. | |
1696 | */ | |
1697 | STATIC int | |
1698 | xlog_check_buffer_cancelled( | |
f7bdf03a | 1699 | struct xlog *log, |
1da177e4 LT |
1700 | xfs_daddr_t blkno, |
1701 | uint len, | |
1702 | ushort flags) | |
1703 | { | |
d5689eaa CH |
1704 | struct list_head *bucket; |
1705 | struct xfs_buf_cancel *bcp; | |
1da177e4 LT |
1706 | |
1707 | if (log->l_buf_cancel_table == NULL) { | |
1708 | /* | |
1709 | * There is nothing in the table built in pass one, | |
1710 | * so this buffer must not be cancelled. | |
1711 | */ | |
c1155410 | 1712 | ASSERT(!(flags & XFS_BLF_CANCEL)); |
1da177e4 LT |
1713 | return 0; |
1714 | } | |
1715 | ||
1da177e4 | 1716 | /* |
d5689eaa | 1717 | * Search for an entry in the cancel table that matches our buffer. |
1da177e4 | 1718 | */ |
d5689eaa CH |
1719 | bucket = XLOG_BUF_CANCEL_BUCKET(log, blkno); |
1720 | list_for_each_entry(bcp, bucket, bc_list) { | |
1721 | if (bcp->bc_blkno == blkno && bcp->bc_len == len) | |
1722 | goto found; | |
1da177e4 | 1723 | } |
d5689eaa | 1724 | |
1da177e4 | 1725 | /* |
d5689eaa CH |
1726 | * We didn't find a corresponding entry in the table, so return 0 so |
1727 | * that the buffer is NOT cancelled. | |
1da177e4 | 1728 | */ |
c1155410 | 1729 | ASSERT(!(flags & XFS_BLF_CANCEL)); |
1da177e4 | 1730 | return 0; |
d5689eaa CH |
1731 | |
1732 | found: | |
1733 | /* | |
1734 | * We've go a match, so return 1 so that the recovery of this buffer | |
1735 | * is cancelled. If this buffer is actually a buffer cancel log | |
1736 | * item, then decrement the refcount on the one in the table and | |
1737 | * remove it if this is the last reference. | |
1738 | */ | |
1739 | if (flags & XFS_BLF_CANCEL) { | |
1740 | if (--bcp->bc_refcount == 0) { | |
1741 | list_del(&bcp->bc_list); | |
1742 | kmem_free(bcp); | |
1743 | } | |
1744 | } | |
1745 | return 1; | |
1da177e4 LT |
1746 | } |
1747 | ||
1da177e4 | 1748 | /* |
e2714bf8 CH |
1749 | * Perform recovery for a buffer full of inodes. In these buffers, the only |
1750 | * data which should be recovered is that which corresponds to the | |
1751 | * di_next_unlinked pointers in the on disk inode structures. The rest of the | |
1752 | * data for the inodes is always logged through the inodes themselves rather | |
1753 | * than the inode buffer and is recovered in xlog_recover_inode_pass2(). | |
1da177e4 | 1754 | * |
e2714bf8 CH |
1755 | * The only time when buffers full of inodes are fully recovered is when the |
1756 | * buffer is full of newly allocated inodes. In this case the buffer will | |
1757 | * not be marked as an inode buffer and so will be sent to | |
1758 | * xlog_recover_do_reg_buffer() below during recovery. | |
1da177e4 LT |
1759 | */ |
1760 | STATIC int | |
1761 | xlog_recover_do_inode_buffer( | |
e2714bf8 | 1762 | struct xfs_mount *mp, |
1da177e4 | 1763 | xlog_recover_item_t *item, |
e2714bf8 | 1764 | struct xfs_buf *bp, |
1da177e4 LT |
1765 | xfs_buf_log_format_t *buf_f) |
1766 | { | |
1767 | int i; | |
e2714bf8 CH |
1768 | int item_index = 0; |
1769 | int bit = 0; | |
1770 | int nbits = 0; | |
1771 | int reg_buf_offset = 0; | |
1772 | int reg_buf_bytes = 0; | |
1da177e4 LT |
1773 | int next_unlinked_offset; |
1774 | int inodes_per_buf; | |
1775 | xfs_agino_t *logged_nextp; | |
1776 | xfs_agino_t *buffer_nextp; | |
1da177e4 | 1777 | |
9abbc539 DC |
1778 | trace_xfs_log_recover_buf_inode_buf(mp->m_log, buf_f); |
1779 | ||
aa0e8833 | 1780 | inodes_per_buf = BBTOB(bp->b_io_length) >> mp->m_sb.sb_inodelog; |
1da177e4 LT |
1781 | for (i = 0; i < inodes_per_buf; i++) { |
1782 | next_unlinked_offset = (i * mp->m_sb.sb_inodesize) + | |
1783 | offsetof(xfs_dinode_t, di_next_unlinked); | |
1784 | ||
1785 | while (next_unlinked_offset >= | |
1786 | (reg_buf_offset + reg_buf_bytes)) { | |
1787 | /* | |
1788 | * The next di_next_unlinked field is beyond | |
1789 | * the current logged region. Find the next | |
1790 | * logged region that contains or is beyond | |
1791 | * the current di_next_unlinked field. | |
1792 | */ | |
1793 | bit += nbits; | |
e2714bf8 CH |
1794 | bit = xfs_next_bit(buf_f->blf_data_map, |
1795 | buf_f->blf_map_size, bit); | |
1da177e4 LT |
1796 | |
1797 | /* | |
1798 | * If there are no more logged regions in the | |
1799 | * buffer, then we're done. | |
1800 | */ | |
e2714bf8 | 1801 | if (bit == -1) |
1da177e4 | 1802 | return 0; |
1da177e4 | 1803 | |
e2714bf8 CH |
1804 | nbits = xfs_contig_bits(buf_f->blf_data_map, |
1805 | buf_f->blf_map_size, bit); | |
1da177e4 | 1806 | ASSERT(nbits > 0); |
c1155410 DC |
1807 | reg_buf_offset = bit << XFS_BLF_SHIFT; |
1808 | reg_buf_bytes = nbits << XFS_BLF_SHIFT; | |
1da177e4 LT |
1809 | item_index++; |
1810 | } | |
1811 | ||
1812 | /* | |
1813 | * If the current logged region starts after the current | |
1814 | * di_next_unlinked field, then move on to the next | |
1815 | * di_next_unlinked field. | |
1816 | */ | |
e2714bf8 | 1817 | if (next_unlinked_offset < reg_buf_offset) |
1da177e4 | 1818 | continue; |
1da177e4 LT |
1819 | |
1820 | ASSERT(item->ri_buf[item_index].i_addr != NULL); | |
c1155410 | 1821 | ASSERT((item->ri_buf[item_index].i_len % XFS_BLF_CHUNK) == 0); |
aa0e8833 DC |
1822 | ASSERT((reg_buf_offset + reg_buf_bytes) <= |
1823 | BBTOB(bp->b_io_length)); | |
1da177e4 LT |
1824 | |
1825 | /* | |
1826 | * The current logged region contains a copy of the | |
1827 | * current di_next_unlinked field. Extract its value | |
1828 | * and copy it to the buffer copy. | |
1829 | */ | |
4e0d5f92 CH |
1830 | logged_nextp = item->ri_buf[item_index].i_addr + |
1831 | next_unlinked_offset - reg_buf_offset; | |
1da177e4 | 1832 | if (unlikely(*logged_nextp == 0)) { |
a0fa2b67 DC |
1833 | xfs_alert(mp, |
1834 | "Bad inode buffer log record (ptr = 0x%p, bp = 0x%p). " | |
1835 | "Trying to replay bad (0) inode di_next_unlinked field.", | |
1da177e4 LT |
1836 | item, bp); |
1837 | XFS_ERROR_REPORT("xlog_recover_do_inode_buf", | |
1838 | XFS_ERRLEVEL_LOW, mp); | |
1839 | return XFS_ERROR(EFSCORRUPTED); | |
1840 | } | |
1841 | ||
1842 | buffer_nextp = (xfs_agino_t *)xfs_buf_offset(bp, | |
1843 | next_unlinked_offset); | |
87c199c2 | 1844 | *buffer_nextp = *logged_nextp; |
1da177e4 LT |
1845 | } |
1846 | ||
1847 | return 0; | |
1848 | } | |
1849 | ||
1850 | /* | |
1851 | * Perform a 'normal' buffer recovery. Each logged region of the | |
1852 | * buffer should be copied over the corresponding region in the | |
1853 | * given buffer. The bitmap in the buf log format structure indicates | |
1854 | * where to place the logged data. | |
1855 | */ | |
1da177e4 LT |
1856 | STATIC void |
1857 | xlog_recover_do_reg_buffer( | |
9abbc539 | 1858 | struct xfs_mount *mp, |
1da177e4 | 1859 | xlog_recover_item_t *item, |
e2714bf8 | 1860 | struct xfs_buf *bp, |
1da177e4 LT |
1861 | xfs_buf_log_format_t *buf_f) |
1862 | { | |
1863 | int i; | |
1864 | int bit; | |
1865 | int nbits; | |
1da177e4 LT |
1866 | int error; |
1867 | ||
9abbc539 DC |
1868 | trace_xfs_log_recover_buf_reg_buf(mp->m_log, buf_f); |
1869 | ||
1da177e4 LT |
1870 | bit = 0; |
1871 | i = 1; /* 0 is the buf format structure */ | |
1872 | while (1) { | |
e2714bf8 CH |
1873 | bit = xfs_next_bit(buf_f->blf_data_map, |
1874 | buf_f->blf_map_size, bit); | |
1da177e4 LT |
1875 | if (bit == -1) |
1876 | break; | |
e2714bf8 CH |
1877 | nbits = xfs_contig_bits(buf_f->blf_data_map, |
1878 | buf_f->blf_map_size, bit); | |
1da177e4 | 1879 | ASSERT(nbits > 0); |
4b80916b | 1880 | ASSERT(item->ri_buf[i].i_addr != NULL); |
c1155410 | 1881 | ASSERT(item->ri_buf[i].i_len % XFS_BLF_CHUNK == 0); |
aa0e8833 DC |
1882 | ASSERT(BBTOB(bp->b_io_length) >= |
1883 | ((uint)bit << XFS_BLF_SHIFT) + (nbits << XFS_BLF_SHIFT)); | |
1da177e4 LT |
1884 | |
1885 | /* | |
1886 | * Do a sanity check if this is a dquot buffer. Just checking | |
1887 | * the first dquot in the buffer should do. XXXThis is | |
1888 | * probably a good thing to do for other buf types also. | |
1889 | */ | |
1890 | error = 0; | |
c8ad20ff | 1891 | if (buf_f->blf_flags & |
c1155410 | 1892 | (XFS_BLF_UDQUOT_BUF|XFS_BLF_PDQUOT_BUF|XFS_BLF_GDQUOT_BUF)) { |
0c5e1ce8 | 1893 | if (item->ri_buf[i].i_addr == NULL) { |
a0fa2b67 | 1894 | xfs_alert(mp, |
0c5e1ce8 CH |
1895 | "XFS: NULL dquot in %s.", __func__); |
1896 | goto next; | |
1897 | } | |
8ec6dba2 | 1898 | if (item->ri_buf[i].i_len < sizeof(xfs_disk_dquot_t)) { |
a0fa2b67 | 1899 | xfs_alert(mp, |
0c5e1ce8 CH |
1900 | "XFS: dquot too small (%d) in %s.", |
1901 | item->ri_buf[i].i_len, __func__); | |
1902 | goto next; | |
1903 | } | |
a0fa2b67 | 1904 | error = xfs_qm_dqcheck(mp, item->ri_buf[i].i_addr, |
1da177e4 LT |
1905 | -1, 0, XFS_QMOPT_DOWARN, |
1906 | "dquot_buf_recover"); | |
0c5e1ce8 CH |
1907 | if (error) |
1908 | goto next; | |
1da177e4 | 1909 | } |
0c5e1ce8 CH |
1910 | |
1911 | memcpy(xfs_buf_offset(bp, | |
c1155410 | 1912 | (uint)bit << XFS_BLF_SHIFT), /* dest */ |
0c5e1ce8 | 1913 | item->ri_buf[i].i_addr, /* source */ |
c1155410 | 1914 | nbits<<XFS_BLF_SHIFT); /* length */ |
0c5e1ce8 | 1915 | next: |
1da177e4 LT |
1916 | i++; |
1917 | bit += nbits; | |
1918 | } | |
1919 | ||
1920 | /* Shouldn't be any more regions */ | |
1921 | ASSERT(i == item->ri_total); | |
1922 | } | |
1923 | ||
1924 | /* | |
1925 | * Do some primitive error checking on ondisk dquot data structures. | |
1926 | */ | |
1927 | int | |
1928 | xfs_qm_dqcheck( | |
a0fa2b67 | 1929 | struct xfs_mount *mp, |
1da177e4 LT |
1930 | xfs_disk_dquot_t *ddq, |
1931 | xfs_dqid_t id, | |
1932 | uint type, /* used only when IO_dorepair is true */ | |
1933 | uint flags, | |
1934 | char *str) | |
1935 | { | |
1936 | xfs_dqblk_t *d = (xfs_dqblk_t *)ddq; | |
1937 | int errs = 0; | |
1938 | ||
1939 | /* | |
1940 | * We can encounter an uninitialized dquot buffer for 2 reasons: | |
1941 | * 1. If we crash while deleting the quotainode(s), and those blks got | |
1942 | * used for user data. This is because we take the path of regular | |
1943 | * file deletion; however, the size field of quotainodes is never | |
1944 | * updated, so all the tricks that we play in itruncate_finish | |
1945 | * don't quite matter. | |
1946 | * | |
1947 | * 2. We don't play the quota buffers when there's a quotaoff logitem. | |
1948 | * But the allocation will be replayed so we'll end up with an | |
1949 | * uninitialized quota block. | |
1950 | * | |
1951 | * This is all fine; things are still consistent, and we haven't lost | |
1952 | * any quota information. Just don't complain about bad dquot blks. | |
1953 | */ | |
69ef921b | 1954 | if (ddq->d_magic != cpu_to_be16(XFS_DQUOT_MAGIC)) { |
1da177e4 | 1955 | if (flags & XFS_QMOPT_DOWARN) |
a0fa2b67 | 1956 | xfs_alert(mp, |
1da177e4 | 1957 | "%s : XFS dquot ID 0x%x, magic 0x%x != 0x%x", |
1149d96a | 1958 | str, id, be16_to_cpu(ddq->d_magic), XFS_DQUOT_MAGIC); |
1da177e4 LT |
1959 | errs++; |
1960 | } | |
1149d96a | 1961 | if (ddq->d_version != XFS_DQUOT_VERSION) { |
1da177e4 | 1962 | if (flags & XFS_QMOPT_DOWARN) |
a0fa2b67 | 1963 | xfs_alert(mp, |
1da177e4 | 1964 | "%s : XFS dquot ID 0x%x, version 0x%x != 0x%x", |
1149d96a | 1965 | str, id, ddq->d_version, XFS_DQUOT_VERSION); |
1da177e4 LT |
1966 | errs++; |
1967 | } | |
1968 | ||
1149d96a CH |
1969 | if (ddq->d_flags != XFS_DQ_USER && |
1970 | ddq->d_flags != XFS_DQ_PROJ && | |
1971 | ddq->d_flags != XFS_DQ_GROUP) { | |
1da177e4 | 1972 | if (flags & XFS_QMOPT_DOWARN) |
a0fa2b67 | 1973 | xfs_alert(mp, |
1da177e4 | 1974 | "%s : XFS dquot ID 0x%x, unknown flags 0x%x", |
1149d96a | 1975 | str, id, ddq->d_flags); |
1da177e4 LT |
1976 | errs++; |
1977 | } | |
1978 | ||
1149d96a | 1979 | if (id != -1 && id != be32_to_cpu(ddq->d_id)) { |
1da177e4 | 1980 | if (flags & XFS_QMOPT_DOWARN) |
a0fa2b67 | 1981 | xfs_alert(mp, |
1da177e4 LT |
1982 | "%s : ondisk-dquot 0x%p, ID mismatch: " |
1983 | "0x%x expected, found id 0x%x", | |
1149d96a | 1984 | str, ddq, id, be32_to_cpu(ddq->d_id)); |
1da177e4 LT |
1985 | errs++; |
1986 | } | |
1987 | ||
1988 | if (!errs && ddq->d_id) { | |
1149d96a | 1989 | if (ddq->d_blk_softlimit && |
d0a3fe67 | 1990 | be64_to_cpu(ddq->d_bcount) > |
1149d96a | 1991 | be64_to_cpu(ddq->d_blk_softlimit)) { |
1da177e4 LT |
1992 | if (!ddq->d_btimer) { |
1993 | if (flags & XFS_QMOPT_DOWARN) | |
a0fa2b67 DC |
1994 | xfs_alert(mp, |
1995 | "%s : Dquot ID 0x%x (0x%p) BLK TIMER NOT STARTED", | |
1149d96a | 1996 | str, (int)be32_to_cpu(ddq->d_id), ddq); |
1da177e4 LT |
1997 | errs++; |
1998 | } | |
1999 | } | |
1149d96a | 2000 | if (ddq->d_ino_softlimit && |
d0a3fe67 | 2001 | be64_to_cpu(ddq->d_icount) > |
1149d96a | 2002 | be64_to_cpu(ddq->d_ino_softlimit)) { |
1da177e4 LT |
2003 | if (!ddq->d_itimer) { |
2004 | if (flags & XFS_QMOPT_DOWARN) | |
a0fa2b67 DC |
2005 | xfs_alert(mp, |
2006 | "%s : Dquot ID 0x%x (0x%p) INODE TIMER NOT STARTED", | |
1149d96a | 2007 | str, (int)be32_to_cpu(ddq->d_id), ddq); |
1da177e4 LT |
2008 | errs++; |
2009 | } | |
2010 | } | |
1149d96a | 2011 | if (ddq->d_rtb_softlimit && |
d0a3fe67 | 2012 | be64_to_cpu(ddq->d_rtbcount) > |
1149d96a | 2013 | be64_to_cpu(ddq->d_rtb_softlimit)) { |
1da177e4 LT |
2014 | if (!ddq->d_rtbtimer) { |
2015 | if (flags & XFS_QMOPT_DOWARN) | |
a0fa2b67 DC |
2016 | xfs_alert(mp, |
2017 | "%s : Dquot ID 0x%x (0x%p) RTBLK TIMER NOT STARTED", | |
1149d96a | 2018 | str, (int)be32_to_cpu(ddq->d_id), ddq); |
1da177e4 LT |
2019 | errs++; |
2020 | } | |
2021 | } | |
2022 | } | |
2023 | ||
2024 | if (!errs || !(flags & XFS_QMOPT_DQREPAIR)) | |
2025 | return errs; | |
2026 | ||
2027 | if (flags & XFS_QMOPT_DOWARN) | |
a0fa2b67 | 2028 | xfs_notice(mp, "Re-initializing dquot ID 0x%x", id); |
1da177e4 LT |
2029 | |
2030 | /* | |
2031 | * Typically, a repair is only requested by quotacheck. | |
2032 | */ | |
2033 | ASSERT(id != -1); | |
2034 | ASSERT(flags & XFS_QMOPT_DQREPAIR); | |
2035 | memset(d, 0, sizeof(xfs_dqblk_t)); | |
1149d96a CH |
2036 | |
2037 | d->dd_diskdq.d_magic = cpu_to_be16(XFS_DQUOT_MAGIC); | |
2038 | d->dd_diskdq.d_version = XFS_DQUOT_VERSION; | |
2039 | d->dd_diskdq.d_flags = type; | |
2040 | d->dd_diskdq.d_id = cpu_to_be32(id); | |
1da177e4 LT |
2041 | |
2042 | return errs; | |
2043 | } | |
2044 | ||
2045 | /* | |
2046 | * Perform a dquot buffer recovery. | |
2047 | * Simple algorithm: if we have found a QUOTAOFF logitem of the same type | |
2048 | * (ie. USR or GRP), then just toss this buffer away; don't recover it. | |
2049 | * Else, treat it as a regular buffer and do recovery. | |
2050 | */ | |
2051 | STATIC void | |
2052 | xlog_recover_do_dquot_buffer( | |
2053 | xfs_mount_t *mp, | |
2054 | xlog_t *log, | |
2055 | xlog_recover_item_t *item, | |
2056 | xfs_buf_t *bp, | |
2057 | xfs_buf_log_format_t *buf_f) | |
2058 | { | |
2059 | uint type; | |
2060 | ||
9abbc539 DC |
2061 | trace_xfs_log_recover_buf_dquot_buf(log, buf_f); |
2062 | ||
1da177e4 LT |
2063 | /* |
2064 | * Filesystems are required to send in quota flags at mount time. | |
2065 | */ | |
2066 | if (mp->m_qflags == 0) { | |
2067 | return; | |
2068 | } | |
2069 | ||
2070 | type = 0; | |
c1155410 | 2071 | if (buf_f->blf_flags & XFS_BLF_UDQUOT_BUF) |
1da177e4 | 2072 | type |= XFS_DQ_USER; |
c1155410 | 2073 | if (buf_f->blf_flags & XFS_BLF_PDQUOT_BUF) |
c8ad20ff | 2074 | type |= XFS_DQ_PROJ; |
c1155410 | 2075 | if (buf_f->blf_flags & XFS_BLF_GDQUOT_BUF) |
1da177e4 LT |
2076 | type |= XFS_DQ_GROUP; |
2077 | /* | |
2078 | * This type of quotas was turned off, so ignore this buffer | |
2079 | */ | |
2080 | if (log->l_quotaoffs_flag & type) | |
2081 | return; | |
2082 | ||
9abbc539 | 2083 | xlog_recover_do_reg_buffer(mp, item, bp, buf_f); |
1da177e4 LT |
2084 | } |
2085 | ||
2086 | /* | |
2087 | * This routine replays a modification made to a buffer at runtime. | |
2088 | * There are actually two types of buffer, regular and inode, which | |
2089 | * are handled differently. Inode buffers are handled differently | |
2090 | * in that we only recover a specific set of data from them, namely | |
2091 | * the inode di_next_unlinked fields. This is because all other inode | |
2092 | * data is actually logged via inode records and any data we replay | |
2093 | * here which overlaps that may be stale. | |
2094 | * | |
2095 | * When meta-data buffers are freed at run time we log a buffer item | |
c1155410 | 2096 | * with the XFS_BLF_CANCEL bit set to indicate that previous copies |
1da177e4 LT |
2097 | * of the buffer in the log should not be replayed at recovery time. |
2098 | * This is so that if the blocks covered by the buffer are reused for | |
2099 | * file data before we crash we don't end up replaying old, freed | |
2100 | * meta-data into a user's file. | |
2101 | * | |
2102 | * To handle the cancellation of buffer log items, we make two passes | |
2103 | * over the log during recovery. During the first we build a table of | |
2104 | * those buffers which have been cancelled, and during the second we | |
2105 | * only replay those buffers which do not have corresponding cancel | |
2106 | * records in the table. See xlog_recover_do_buffer_pass[1,2] above | |
2107 | * for more details on the implementation of the table of cancel records. | |
2108 | */ | |
2109 | STATIC int | |
c9f71f5f | 2110 | xlog_recover_buffer_pass2( |
1da177e4 | 2111 | xlog_t *log, |
43ff2122 | 2112 | struct list_head *buffer_list, |
c9f71f5f | 2113 | xlog_recover_item_t *item) |
1da177e4 | 2114 | { |
4e0d5f92 | 2115 | xfs_buf_log_format_t *buf_f = item->ri_buf[0].i_addr; |
e2714bf8 | 2116 | xfs_mount_t *mp = log->l_mp; |
1da177e4 LT |
2117 | xfs_buf_t *bp; |
2118 | int error; | |
6ad112bf | 2119 | uint buf_flags; |
1da177e4 | 2120 | |
c9f71f5f CH |
2121 | /* |
2122 | * In this pass we only want to recover all the buffers which have | |
2123 | * not been cancelled and are not cancellation buffers themselves. | |
2124 | */ | |
2125 | if (xlog_check_buffer_cancelled(log, buf_f->blf_blkno, | |
2126 | buf_f->blf_len, buf_f->blf_flags)) { | |
2127 | trace_xfs_log_recover_buf_cancel(log, buf_f); | |
1da177e4 | 2128 | return 0; |
1da177e4 | 2129 | } |
c9f71f5f | 2130 | |
9abbc539 | 2131 | trace_xfs_log_recover_buf_recover(log, buf_f); |
1da177e4 | 2132 | |
a8acad70 | 2133 | buf_flags = 0; |
611c9946 DC |
2134 | if (buf_f->blf_flags & XFS_BLF_INODE_BUF) |
2135 | buf_flags |= XBF_UNMAPPED; | |
6ad112bf | 2136 | |
e2714bf8 CH |
2137 | bp = xfs_buf_read(mp->m_ddev_targp, buf_f->blf_blkno, buf_f->blf_len, |
2138 | buf_flags); | |
ac4d6888 CS |
2139 | if (!bp) |
2140 | return XFS_ERROR(ENOMEM); | |
e5702805 | 2141 | error = bp->b_error; |
5a52c2a5 | 2142 | if (error) { |
901796af | 2143 | xfs_buf_ioerror_alert(bp, "xlog_recover_do..(read#1)"); |
1da177e4 LT |
2144 | xfs_buf_relse(bp); |
2145 | return error; | |
2146 | } | |
2147 | ||
e2714bf8 | 2148 | if (buf_f->blf_flags & XFS_BLF_INODE_BUF) { |
1da177e4 | 2149 | error = xlog_recover_do_inode_buffer(mp, item, bp, buf_f); |
e2714bf8 | 2150 | } else if (buf_f->blf_flags & |
c1155410 | 2151 | (XFS_BLF_UDQUOT_BUF|XFS_BLF_PDQUOT_BUF|XFS_BLF_GDQUOT_BUF)) { |
1da177e4 LT |
2152 | xlog_recover_do_dquot_buffer(mp, log, item, bp, buf_f); |
2153 | } else { | |
9abbc539 | 2154 | xlog_recover_do_reg_buffer(mp, item, bp, buf_f); |
1da177e4 LT |
2155 | } |
2156 | if (error) | |
2157 | return XFS_ERROR(error); | |
2158 | ||
2159 | /* | |
2160 | * Perform delayed write on the buffer. Asynchronous writes will be | |
2161 | * slower when taking into account all the buffers to be flushed. | |
2162 | * | |
2163 | * Also make sure that only inode buffers with good sizes stay in | |
2164 | * the buffer cache. The kernel moves inodes in buffers of 1 block | |
2165 | * or XFS_INODE_CLUSTER_SIZE bytes, whichever is bigger. The inode | |
2166 | * buffers in the log can be a different size if the log was generated | |
2167 | * by an older kernel using unclustered inode buffers or a newer kernel | |
2168 | * running with a different inode cluster size. Regardless, if the | |
2169 | * the inode buffer size isn't MAX(blocksize, XFS_INODE_CLUSTER_SIZE) | |
2170 | * for *our* value of XFS_INODE_CLUSTER_SIZE, then we need to keep | |
2171 | * the buffer out of the buffer cache so that the buffer won't | |
2172 | * overlap with future reads of those inodes. | |
2173 | */ | |
2174 | if (XFS_DINODE_MAGIC == | |
b53e675d | 2175 | be16_to_cpu(*((__be16 *)xfs_buf_offset(bp, 0))) && |
aa0e8833 | 2176 | (BBTOB(bp->b_io_length) != MAX(log->l_mp->m_sb.sb_blocksize, |
1da177e4 | 2177 | (__uint32_t)XFS_INODE_CLUSTER_SIZE(log->l_mp)))) { |
c867cb61 | 2178 | xfs_buf_stale(bp); |
c2b006c1 | 2179 | error = xfs_bwrite(bp); |
1da177e4 | 2180 | } else { |
ebad861b | 2181 | ASSERT(bp->b_target->bt_mount == mp); |
cb669ca5 | 2182 | bp->b_iodone = xlog_recover_iodone; |
43ff2122 | 2183 | xfs_buf_delwri_queue(bp, buffer_list); |
1da177e4 LT |
2184 | } |
2185 | ||
c2b006c1 CH |
2186 | xfs_buf_relse(bp); |
2187 | return error; | |
1da177e4 LT |
2188 | } |
2189 | ||
2190 | STATIC int | |
c9f71f5f | 2191 | xlog_recover_inode_pass2( |
1da177e4 | 2192 | xlog_t *log, |
43ff2122 | 2193 | struct list_head *buffer_list, |
c9f71f5f | 2194 | xlog_recover_item_t *item) |
1da177e4 LT |
2195 | { |
2196 | xfs_inode_log_format_t *in_f; | |
c9f71f5f | 2197 | xfs_mount_t *mp = log->l_mp; |
1da177e4 | 2198 | xfs_buf_t *bp; |
1da177e4 | 2199 | xfs_dinode_t *dip; |
1da177e4 LT |
2200 | int len; |
2201 | xfs_caddr_t src; | |
2202 | xfs_caddr_t dest; | |
2203 | int error; | |
2204 | int attr_index; | |
2205 | uint fields; | |
347d1c01 | 2206 | xfs_icdinode_t *dicp; |
6d192a9b | 2207 | int need_free = 0; |
1da177e4 | 2208 | |
6d192a9b | 2209 | if (item->ri_buf[0].i_len == sizeof(xfs_inode_log_format_t)) { |
4e0d5f92 | 2210 | in_f = item->ri_buf[0].i_addr; |
6d192a9b | 2211 | } else { |
4e0d5f92 | 2212 | in_f = kmem_alloc(sizeof(xfs_inode_log_format_t), KM_SLEEP); |
6d192a9b TS |
2213 | need_free = 1; |
2214 | error = xfs_inode_item_format_convert(&item->ri_buf[0], in_f); | |
2215 | if (error) | |
2216 | goto error; | |
2217 | } | |
1da177e4 LT |
2218 | |
2219 | /* | |
2220 | * Inode buffers can be freed, look out for it, | |
2221 | * and do not replay the inode. | |
2222 | */ | |
a1941895 CH |
2223 | if (xlog_check_buffer_cancelled(log, in_f->ilf_blkno, |
2224 | in_f->ilf_len, 0)) { | |
6d192a9b | 2225 | error = 0; |
9abbc539 | 2226 | trace_xfs_log_recover_inode_cancel(log, in_f); |
6d192a9b TS |
2227 | goto error; |
2228 | } | |
9abbc539 | 2229 | trace_xfs_log_recover_inode_recover(log, in_f); |
1da177e4 | 2230 | |
a8acad70 | 2231 | bp = xfs_buf_read(mp->m_ddev_targp, in_f->ilf_blkno, in_f->ilf_len, 0); |
ac4d6888 CS |
2232 | if (!bp) { |
2233 | error = ENOMEM; | |
2234 | goto error; | |
2235 | } | |
e5702805 | 2236 | error = bp->b_error; |
5a52c2a5 | 2237 | if (error) { |
901796af | 2238 | xfs_buf_ioerror_alert(bp, "xlog_recover_do..(read#2)"); |
1da177e4 | 2239 | xfs_buf_relse(bp); |
6d192a9b | 2240 | goto error; |
1da177e4 | 2241 | } |
1da177e4 | 2242 | ASSERT(in_f->ilf_fields & XFS_ILOG_CORE); |
a1941895 | 2243 | dip = (xfs_dinode_t *)xfs_buf_offset(bp, in_f->ilf_boffset); |
1da177e4 LT |
2244 | |
2245 | /* | |
2246 | * Make sure the place we're flushing out to really looks | |
2247 | * like an inode! | |
2248 | */ | |
69ef921b | 2249 | if (unlikely(dip->di_magic != cpu_to_be16(XFS_DINODE_MAGIC))) { |
1da177e4 | 2250 | xfs_buf_relse(bp); |
a0fa2b67 DC |
2251 | xfs_alert(mp, |
2252 | "%s: Bad inode magic number, dip = 0x%p, dino bp = 0x%p, ino = %Ld", | |
2253 | __func__, dip, bp, in_f->ilf_ino); | |
c9f71f5f | 2254 | XFS_ERROR_REPORT("xlog_recover_inode_pass2(1)", |
1da177e4 | 2255 | XFS_ERRLEVEL_LOW, mp); |
6d192a9b TS |
2256 | error = EFSCORRUPTED; |
2257 | goto error; | |
1da177e4 | 2258 | } |
4e0d5f92 | 2259 | dicp = item->ri_buf[1].i_addr; |
1da177e4 LT |
2260 | if (unlikely(dicp->di_magic != XFS_DINODE_MAGIC)) { |
2261 | xfs_buf_relse(bp); | |
a0fa2b67 DC |
2262 | xfs_alert(mp, |
2263 | "%s: Bad inode log record, rec ptr 0x%p, ino %Ld", | |
2264 | __func__, item, in_f->ilf_ino); | |
c9f71f5f | 2265 | XFS_ERROR_REPORT("xlog_recover_inode_pass2(2)", |
1da177e4 | 2266 | XFS_ERRLEVEL_LOW, mp); |
6d192a9b TS |
2267 | error = EFSCORRUPTED; |
2268 | goto error; | |
1da177e4 LT |
2269 | } |
2270 | ||
2271 | /* Skip replay when the on disk inode is newer than the log one */ | |
81591fe2 | 2272 | if (dicp->di_flushiter < be16_to_cpu(dip->di_flushiter)) { |
1da177e4 LT |
2273 | /* |
2274 | * Deal with the wrap case, DI_MAX_FLUSH is less | |
2275 | * than smaller numbers | |
2276 | */ | |
81591fe2 | 2277 | if (be16_to_cpu(dip->di_flushiter) == DI_MAX_FLUSH && |
347d1c01 | 2278 | dicp->di_flushiter < (DI_MAX_FLUSH >> 1)) { |
1da177e4 LT |
2279 | /* do nothing */ |
2280 | } else { | |
2281 | xfs_buf_relse(bp); | |
9abbc539 | 2282 | trace_xfs_log_recover_inode_skip(log, in_f); |
6d192a9b TS |
2283 | error = 0; |
2284 | goto error; | |
1da177e4 LT |
2285 | } |
2286 | } | |
2287 | /* Take the opportunity to reset the flush iteration count */ | |
2288 | dicp->di_flushiter = 0; | |
2289 | ||
abbede1b | 2290 | if (unlikely(S_ISREG(dicp->di_mode))) { |
1da177e4 LT |
2291 | if ((dicp->di_format != XFS_DINODE_FMT_EXTENTS) && |
2292 | (dicp->di_format != XFS_DINODE_FMT_BTREE)) { | |
c9f71f5f | 2293 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(3)", |
1da177e4 LT |
2294 | XFS_ERRLEVEL_LOW, mp, dicp); |
2295 | xfs_buf_relse(bp); | |
a0fa2b67 DC |
2296 | xfs_alert(mp, |
2297 | "%s: Bad regular inode log record, rec ptr 0x%p, " | |
2298 | "ino ptr = 0x%p, ino bp = 0x%p, ino %Ld", | |
2299 | __func__, item, dip, bp, in_f->ilf_ino); | |
6d192a9b TS |
2300 | error = EFSCORRUPTED; |
2301 | goto error; | |
1da177e4 | 2302 | } |
abbede1b | 2303 | } else if (unlikely(S_ISDIR(dicp->di_mode))) { |
1da177e4 LT |
2304 | if ((dicp->di_format != XFS_DINODE_FMT_EXTENTS) && |
2305 | (dicp->di_format != XFS_DINODE_FMT_BTREE) && | |
2306 | (dicp->di_format != XFS_DINODE_FMT_LOCAL)) { | |
c9f71f5f | 2307 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(4)", |
1da177e4 LT |
2308 | XFS_ERRLEVEL_LOW, mp, dicp); |
2309 | xfs_buf_relse(bp); | |
a0fa2b67 DC |
2310 | xfs_alert(mp, |
2311 | "%s: Bad dir inode log record, rec ptr 0x%p, " | |
2312 | "ino ptr = 0x%p, ino bp = 0x%p, ino %Ld", | |
2313 | __func__, item, dip, bp, in_f->ilf_ino); | |
6d192a9b TS |
2314 | error = EFSCORRUPTED; |
2315 | goto error; | |
1da177e4 LT |
2316 | } |
2317 | } | |
2318 | if (unlikely(dicp->di_nextents + dicp->di_anextents > dicp->di_nblocks)){ | |
c9f71f5f | 2319 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(5)", |
1da177e4 LT |
2320 | XFS_ERRLEVEL_LOW, mp, dicp); |
2321 | xfs_buf_relse(bp); | |
a0fa2b67 DC |
2322 | xfs_alert(mp, |
2323 | "%s: Bad inode log record, rec ptr 0x%p, dino ptr 0x%p, " | |
2324 | "dino bp 0x%p, ino %Ld, total extents = %d, nblocks = %Ld", | |
2325 | __func__, item, dip, bp, in_f->ilf_ino, | |
1da177e4 LT |
2326 | dicp->di_nextents + dicp->di_anextents, |
2327 | dicp->di_nblocks); | |
6d192a9b TS |
2328 | error = EFSCORRUPTED; |
2329 | goto error; | |
1da177e4 LT |
2330 | } |
2331 | if (unlikely(dicp->di_forkoff > mp->m_sb.sb_inodesize)) { | |
c9f71f5f | 2332 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(6)", |
1da177e4 LT |
2333 | XFS_ERRLEVEL_LOW, mp, dicp); |
2334 | xfs_buf_relse(bp); | |
a0fa2b67 DC |
2335 | xfs_alert(mp, |
2336 | "%s: Bad inode log record, rec ptr 0x%p, dino ptr 0x%p, " | |
2337 | "dino bp 0x%p, ino %Ld, forkoff 0x%x", __func__, | |
c9f71f5f | 2338 | item, dip, bp, in_f->ilf_ino, dicp->di_forkoff); |
6d192a9b TS |
2339 | error = EFSCORRUPTED; |
2340 | goto error; | |
1da177e4 | 2341 | } |
81591fe2 | 2342 | if (unlikely(item->ri_buf[1].i_len > sizeof(struct xfs_icdinode))) { |
c9f71f5f | 2343 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(7)", |
1da177e4 LT |
2344 | XFS_ERRLEVEL_LOW, mp, dicp); |
2345 | xfs_buf_relse(bp); | |
a0fa2b67 DC |
2346 | xfs_alert(mp, |
2347 | "%s: Bad inode log record length %d, rec ptr 0x%p", | |
2348 | __func__, item->ri_buf[1].i_len, item); | |
6d192a9b TS |
2349 | error = EFSCORRUPTED; |
2350 | goto error; | |
1da177e4 LT |
2351 | } |
2352 | ||
2353 | /* The core is in in-core format */ | |
4e0d5f92 | 2354 | xfs_dinode_to_disk(dip, item->ri_buf[1].i_addr); |
1da177e4 LT |
2355 | |
2356 | /* the rest is in on-disk format */ | |
81591fe2 CH |
2357 | if (item->ri_buf[1].i_len > sizeof(struct xfs_icdinode)) { |
2358 | memcpy((xfs_caddr_t) dip + sizeof(struct xfs_icdinode), | |
2359 | item->ri_buf[1].i_addr + sizeof(struct xfs_icdinode), | |
2360 | item->ri_buf[1].i_len - sizeof(struct xfs_icdinode)); | |
1da177e4 LT |
2361 | } |
2362 | ||
2363 | fields = in_f->ilf_fields; | |
2364 | switch (fields & (XFS_ILOG_DEV | XFS_ILOG_UUID)) { | |
2365 | case XFS_ILOG_DEV: | |
81591fe2 | 2366 | xfs_dinode_put_rdev(dip, in_f->ilf_u.ilfu_rdev); |
1da177e4 LT |
2367 | break; |
2368 | case XFS_ILOG_UUID: | |
81591fe2 CH |
2369 | memcpy(XFS_DFORK_DPTR(dip), |
2370 | &in_f->ilf_u.ilfu_uuid, | |
2371 | sizeof(uuid_t)); | |
1da177e4 LT |
2372 | break; |
2373 | } | |
2374 | ||
2375 | if (in_f->ilf_size == 2) | |
2376 | goto write_inode_buffer; | |
2377 | len = item->ri_buf[2].i_len; | |
2378 | src = item->ri_buf[2].i_addr; | |
2379 | ASSERT(in_f->ilf_size <= 4); | |
2380 | ASSERT((in_f->ilf_size == 3) || (fields & XFS_ILOG_AFORK)); | |
2381 | ASSERT(!(fields & XFS_ILOG_DFORK) || | |
2382 | (len == in_f->ilf_dsize)); | |
2383 | ||
2384 | switch (fields & XFS_ILOG_DFORK) { | |
2385 | case XFS_ILOG_DDATA: | |
2386 | case XFS_ILOG_DEXT: | |
81591fe2 | 2387 | memcpy(XFS_DFORK_DPTR(dip), src, len); |
1da177e4 LT |
2388 | break; |
2389 | ||
2390 | case XFS_ILOG_DBROOT: | |
7cc95a82 | 2391 | xfs_bmbt_to_bmdr(mp, (struct xfs_btree_block *)src, len, |
81591fe2 | 2392 | (xfs_bmdr_block_t *)XFS_DFORK_DPTR(dip), |
1da177e4 LT |
2393 | XFS_DFORK_DSIZE(dip, mp)); |
2394 | break; | |
2395 | ||
2396 | default: | |
2397 | /* | |
2398 | * There are no data fork flags set. | |
2399 | */ | |
2400 | ASSERT((fields & XFS_ILOG_DFORK) == 0); | |
2401 | break; | |
2402 | } | |
2403 | ||
2404 | /* | |
2405 | * If we logged any attribute data, recover it. There may or | |
2406 | * may not have been any other non-core data logged in this | |
2407 | * transaction. | |
2408 | */ | |
2409 | if (in_f->ilf_fields & XFS_ILOG_AFORK) { | |
2410 | if (in_f->ilf_fields & XFS_ILOG_DFORK) { | |
2411 | attr_index = 3; | |
2412 | } else { | |
2413 | attr_index = 2; | |
2414 | } | |
2415 | len = item->ri_buf[attr_index].i_len; | |
2416 | src = item->ri_buf[attr_index].i_addr; | |
2417 | ASSERT(len == in_f->ilf_asize); | |
2418 | ||
2419 | switch (in_f->ilf_fields & XFS_ILOG_AFORK) { | |
2420 | case XFS_ILOG_ADATA: | |
2421 | case XFS_ILOG_AEXT: | |
2422 | dest = XFS_DFORK_APTR(dip); | |
2423 | ASSERT(len <= XFS_DFORK_ASIZE(dip, mp)); | |
2424 | memcpy(dest, src, len); | |
2425 | break; | |
2426 | ||
2427 | case XFS_ILOG_ABROOT: | |
2428 | dest = XFS_DFORK_APTR(dip); | |
7cc95a82 CH |
2429 | xfs_bmbt_to_bmdr(mp, (struct xfs_btree_block *)src, |
2430 | len, (xfs_bmdr_block_t*)dest, | |
1da177e4 LT |
2431 | XFS_DFORK_ASIZE(dip, mp)); |
2432 | break; | |
2433 | ||
2434 | default: | |
a0fa2b67 | 2435 | xfs_warn(log->l_mp, "%s: Invalid flag", __func__); |
1da177e4 LT |
2436 | ASSERT(0); |
2437 | xfs_buf_relse(bp); | |
6d192a9b TS |
2438 | error = EIO; |
2439 | goto error; | |
1da177e4 LT |
2440 | } |
2441 | } | |
2442 | ||
2443 | write_inode_buffer: | |
ebad861b | 2444 | ASSERT(bp->b_target->bt_mount == mp); |
cb669ca5 | 2445 | bp->b_iodone = xlog_recover_iodone; |
43ff2122 | 2446 | xfs_buf_delwri_queue(bp, buffer_list); |
61551f1e | 2447 | xfs_buf_relse(bp); |
6d192a9b TS |
2448 | error: |
2449 | if (need_free) | |
f0e2d93c | 2450 | kmem_free(in_f); |
6d192a9b | 2451 | return XFS_ERROR(error); |
1da177e4 LT |
2452 | } |
2453 | ||
2454 | /* | |
2455 | * Recover QUOTAOFF records. We simply make a note of it in the xlog_t | |
2456 | * structure, so that we know not to do any dquot item or dquot buffer recovery, | |
2457 | * of that type. | |
2458 | */ | |
2459 | STATIC int | |
c9f71f5f | 2460 | xlog_recover_quotaoff_pass1( |
1da177e4 | 2461 | xlog_t *log, |
c9f71f5f | 2462 | xlog_recover_item_t *item) |
1da177e4 | 2463 | { |
c9f71f5f | 2464 | xfs_qoff_logformat_t *qoff_f = item->ri_buf[0].i_addr; |
1da177e4 LT |
2465 | ASSERT(qoff_f); |
2466 | ||
2467 | /* | |
2468 | * The logitem format's flag tells us if this was user quotaoff, | |
77a7cce4 | 2469 | * group/project quotaoff or both. |
1da177e4 LT |
2470 | */ |
2471 | if (qoff_f->qf_flags & XFS_UQUOTA_ACCT) | |
2472 | log->l_quotaoffs_flag |= XFS_DQ_USER; | |
77a7cce4 NS |
2473 | if (qoff_f->qf_flags & XFS_PQUOTA_ACCT) |
2474 | log->l_quotaoffs_flag |= XFS_DQ_PROJ; | |
1da177e4 LT |
2475 | if (qoff_f->qf_flags & XFS_GQUOTA_ACCT) |
2476 | log->l_quotaoffs_flag |= XFS_DQ_GROUP; | |
2477 | ||
2478 | return (0); | |
2479 | } | |
2480 | ||
2481 | /* | |
2482 | * Recover a dquot record | |
2483 | */ | |
2484 | STATIC int | |
c9f71f5f | 2485 | xlog_recover_dquot_pass2( |
1da177e4 | 2486 | xlog_t *log, |
43ff2122 | 2487 | struct list_head *buffer_list, |
c9f71f5f | 2488 | xlog_recover_item_t *item) |
1da177e4 | 2489 | { |
c9f71f5f | 2490 | xfs_mount_t *mp = log->l_mp; |
1da177e4 LT |
2491 | xfs_buf_t *bp; |
2492 | struct xfs_disk_dquot *ddq, *recddq; | |
2493 | int error; | |
2494 | xfs_dq_logformat_t *dq_f; | |
2495 | uint type; | |
2496 | ||
1da177e4 LT |
2497 | |
2498 | /* | |
2499 | * Filesystems are required to send in quota flags at mount time. | |
2500 | */ | |
2501 | if (mp->m_qflags == 0) | |
2502 | return (0); | |
2503 | ||
4e0d5f92 CH |
2504 | recddq = item->ri_buf[1].i_addr; |
2505 | if (recddq == NULL) { | |
a0fa2b67 | 2506 | xfs_alert(log->l_mp, "NULL dquot in %s.", __func__); |
0c5e1ce8 CH |
2507 | return XFS_ERROR(EIO); |
2508 | } | |
8ec6dba2 | 2509 | if (item->ri_buf[1].i_len < sizeof(xfs_disk_dquot_t)) { |
a0fa2b67 | 2510 | xfs_alert(log->l_mp, "dquot too small (%d) in %s.", |
0c5e1ce8 CH |
2511 | item->ri_buf[1].i_len, __func__); |
2512 | return XFS_ERROR(EIO); | |
2513 | } | |
2514 | ||
1da177e4 LT |
2515 | /* |
2516 | * This type of quotas was turned off, so ignore this record. | |
2517 | */ | |
b53e675d | 2518 | type = recddq->d_flags & (XFS_DQ_USER | XFS_DQ_PROJ | XFS_DQ_GROUP); |
1da177e4 LT |
2519 | ASSERT(type); |
2520 | if (log->l_quotaoffs_flag & type) | |
2521 | return (0); | |
2522 | ||
2523 | /* | |
2524 | * At this point we know that quota was _not_ turned off. | |
2525 | * Since the mount flags are not indicating to us otherwise, this | |
2526 | * must mean that quota is on, and the dquot needs to be replayed. | |
2527 | * Remember that we may not have fully recovered the superblock yet, | |
2528 | * so we can't do the usual trick of looking at the SB quota bits. | |
2529 | * | |
2530 | * The other possibility, of course, is that the quota subsystem was | |
2531 | * removed since the last mount - ENOSYS. | |
2532 | */ | |
4e0d5f92 | 2533 | dq_f = item->ri_buf[0].i_addr; |
1da177e4 | 2534 | ASSERT(dq_f); |
a0fa2b67 DC |
2535 | error = xfs_qm_dqcheck(mp, recddq, dq_f->qlf_id, 0, XFS_QMOPT_DOWARN, |
2536 | "xlog_recover_dquot_pass2 (log copy)"); | |
2537 | if (error) | |
1da177e4 | 2538 | return XFS_ERROR(EIO); |
1da177e4 LT |
2539 | ASSERT(dq_f->qlf_len == 1); |
2540 | ||
7ca790a5 DC |
2541 | error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, dq_f->qlf_blkno, |
2542 | XFS_FSB_TO_BB(mp, dq_f->qlf_len), 0, &bp); | |
2543 | if (error) | |
1da177e4 | 2544 | return error; |
7ca790a5 | 2545 | |
1da177e4 LT |
2546 | ASSERT(bp); |
2547 | ddq = (xfs_disk_dquot_t *)xfs_buf_offset(bp, dq_f->qlf_boffset); | |
2548 | ||
2549 | /* | |
2550 | * At least the magic num portion should be on disk because this | |
2551 | * was among a chunk of dquots created earlier, and we did some | |
2552 | * minimal initialization then. | |
2553 | */ | |
a0fa2b67 DC |
2554 | error = xfs_qm_dqcheck(mp, ddq, dq_f->qlf_id, 0, XFS_QMOPT_DOWARN, |
2555 | "xlog_recover_dquot_pass2"); | |
2556 | if (error) { | |
1da177e4 LT |
2557 | xfs_buf_relse(bp); |
2558 | return XFS_ERROR(EIO); | |
2559 | } | |
2560 | ||
2561 | memcpy(ddq, recddq, item->ri_buf[1].i_len); | |
2562 | ||
2563 | ASSERT(dq_f->qlf_size == 2); | |
ebad861b | 2564 | ASSERT(bp->b_target->bt_mount == mp); |
cb669ca5 | 2565 | bp->b_iodone = xlog_recover_iodone; |
43ff2122 | 2566 | xfs_buf_delwri_queue(bp, buffer_list); |
61551f1e | 2567 | xfs_buf_relse(bp); |
1da177e4 LT |
2568 | |
2569 | return (0); | |
2570 | } | |
2571 | ||
2572 | /* | |
2573 | * This routine is called to create an in-core extent free intent | |
2574 | * item from the efi format structure which was logged on disk. | |
2575 | * It allocates an in-core efi, copies the extents from the format | |
2576 | * structure into it, and adds the efi to the AIL with the given | |
2577 | * LSN. | |
2578 | */ | |
6d192a9b | 2579 | STATIC int |
c9f71f5f | 2580 | xlog_recover_efi_pass2( |
1da177e4 LT |
2581 | xlog_t *log, |
2582 | xlog_recover_item_t *item, | |
c9f71f5f | 2583 | xfs_lsn_t lsn) |
1da177e4 | 2584 | { |
6d192a9b | 2585 | int error; |
c9f71f5f | 2586 | xfs_mount_t *mp = log->l_mp; |
1da177e4 LT |
2587 | xfs_efi_log_item_t *efip; |
2588 | xfs_efi_log_format_t *efi_formatp; | |
1da177e4 | 2589 | |
4e0d5f92 | 2590 | efi_formatp = item->ri_buf[0].i_addr; |
1da177e4 | 2591 | |
1da177e4 | 2592 | efip = xfs_efi_init(mp, efi_formatp->efi_nextents); |
6d192a9b TS |
2593 | if ((error = xfs_efi_copy_format(&(item->ri_buf[0]), |
2594 | &(efip->efi_format)))) { | |
2595 | xfs_efi_item_free(efip); | |
2596 | return error; | |
2597 | } | |
b199c8a4 | 2598 | atomic_set(&efip->efi_next_extent, efi_formatp->efi_nextents); |
1da177e4 | 2599 | |
a9c21c1b | 2600 | spin_lock(&log->l_ailp->xa_lock); |
1da177e4 | 2601 | /* |
783a2f65 | 2602 | * xfs_trans_ail_update() drops the AIL lock. |
1da177e4 | 2603 | */ |
e6059949 | 2604 | xfs_trans_ail_update(log->l_ailp, &efip->efi_item, lsn); |
6d192a9b | 2605 | return 0; |
1da177e4 LT |
2606 | } |
2607 | ||
2608 | ||
2609 | /* | |
2610 | * This routine is called when an efd format structure is found in | |
2611 | * a committed transaction in the log. It's purpose is to cancel | |
2612 | * the corresponding efi if it was still in the log. To do this | |
2613 | * it searches the AIL for the efi with an id equal to that in the | |
2614 | * efd format structure. If we find it, we remove the efi from the | |
2615 | * AIL and free it. | |
2616 | */ | |
c9f71f5f CH |
2617 | STATIC int |
2618 | xlog_recover_efd_pass2( | |
1da177e4 | 2619 | xlog_t *log, |
c9f71f5f | 2620 | xlog_recover_item_t *item) |
1da177e4 | 2621 | { |
1da177e4 LT |
2622 | xfs_efd_log_format_t *efd_formatp; |
2623 | xfs_efi_log_item_t *efip = NULL; | |
2624 | xfs_log_item_t *lip; | |
1da177e4 | 2625 | __uint64_t efi_id; |
27d8d5fe | 2626 | struct xfs_ail_cursor cur; |
783a2f65 | 2627 | struct xfs_ail *ailp = log->l_ailp; |
1da177e4 | 2628 | |
4e0d5f92 | 2629 | efd_formatp = item->ri_buf[0].i_addr; |
6d192a9b TS |
2630 | ASSERT((item->ri_buf[0].i_len == (sizeof(xfs_efd_log_format_32_t) + |
2631 | ((efd_formatp->efd_nextents - 1) * sizeof(xfs_extent_32_t)))) || | |
2632 | (item->ri_buf[0].i_len == (sizeof(xfs_efd_log_format_64_t) + | |
2633 | ((efd_formatp->efd_nextents - 1) * sizeof(xfs_extent_64_t))))); | |
1da177e4 LT |
2634 | efi_id = efd_formatp->efd_efi_id; |
2635 | ||
2636 | /* | |
2637 | * Search for the efi with the id in the efd format structure | |
2638 | * in the AIL. | |
2639 | */ | |
a9c21c1b DC |
2640 | spin_lock(&ailp->xa_lock); |
2641 | lip = xfs_trans_ail_cursor_first(ailp, &cur, 0); | |
1da177e4 LT |
2642 | while (lip != NULL) { |
2643 | if (lip->li_type == XFS_LI_EFI) { | |
2644 | efip = (xfs_efi_log_item_t *)lip; | |
2645 | if (efip->efi_format.efi_id == efi_id) { | |
2646 | /* | |
783a2f65 | 2647 | * xfs_trans_ail_delete() drops the |
1da177e4 LT |
2648 | * AIL lock. |
2649 | */ | |
04913fdd DC |
2650 | xfs_trans_ail_delete(ailp, lip, |
2651 | SHUTDOWN_CORRUPT_INCORE); | |
8ae2c0f6 | 2652 | xfs_efi_item_free(efip); |
a9c21c1b | 2653 | spin_lock(&ailp->xa_lock); |
27d8d5fe | 2654 | break; |
1da177e4 LT |
2655 | } |
2656 | } | |
a9c21c1b | 2657 | lip = xfs_trans_ail_cursor_next(ailp, &cur); |
1da177e4 | 2658 | } |
a9c21c1b DC |
2659 | xfs_trans_ail_cursor_done(ailp, &cur); |
2660 | spin_unlock(&ailp->xa_lock); | |
c9f71f5f CH |
2661 | |
2662 | return 0; | |
1da177e4 LT |
2663 | } |
2664 | ||
1da177e4 LT |
2665 | /* |
2666 | * Free up any resources allocated by the transaction | |
2667 | * | |
2668 | * Remember that EFIs, EFDs, and IUNLINKs are handled later. | |
2669 | */ | |
2670 | STATIC void | |
2671 | xlog_recover_free_trans( | |
d0450948 | 2672 | struct xlog_recover *trans) |
1da177e4 | 2673 | { |
f0a76953 | 2674 | xlog_recover_item_t *item, *n; |
1da177e4 LT |
2675 | int i; |
2676 | ||
f0a76953 DC |
2677 | list_for_each_entry_safe(item, n, &trans->r_itemq, ri_list) { |
2678 | /* Free the regions in the item. */ | |
2679 | list_del(&item->ri_list); | |
2680 | for (i = 0; i < item->ri_cnt; i++) | |
2681 | kmem_free(item->ri_buf[i].i_addr); | |
1da177e4 | 2682 | /* Free the item itself */ |
f0a76953 DC |
2683 | kmem_free(item->ri_buf); |
2684 | kmem_free(item); | |
2685 | } | |
1da177e4 | 2686 | /* Free the transaction recover structure */ |
f0e2d93c | 2687 | kmem_free(trans); |
1da177e4 LT |
2688 | } |
2689 | ||
d0450948 | 2690 | STATIC int |
c9f71f5f | 2691 | xlog_recover_commit_pass1( |
f7bdf03a MT |
2692 | struct xlog *log, |
2693 | struct xlog_recover *trans, | |
2694 | struct xlog_recover_item *item) | |
d0450948 | 2695 | { |
c9f71f5f | 2696 | trace_xfs_log_recover_item_recover(log, trans, item, XLOG_RECOVER_PASS1); |
d0450948 CH |
2697 | |
2698 | switch (ITEM_TYPE(item)) { | |
2699 | case XFS_LI_BUF: | |
c9f71f5f CH |
2700 | return xlog_recover_buffer_pass1(log, item); |
2701 | case XFS_LI_QUOTAOFF: | |
2702 | return xlog_recover_quotaoff_pass1(log, item); | |
d0450948 | 2703 | case XFS_LI_INODE: |
d0450948 | 2704 | case XFS_LI_EFI: |
d0450948 | 2705 | case XFS_LI_EFD: |
c9f71f5f CH |
2706 | case XFS_LI_DQUOT: |
2707 | /* nothing to do in pass 1 */ | |
d0450948 | 2708 | return 0; |
c9f71f5f | 2709 | default: |
a0fa2b67 DC |
2710 | xfs_warn(log->l_mp, "%s: invalid item type (%d)", |
2711 | __func__, ITEM_TYPE(item)); | |
c9f71f5f CH |
2712 | ASSERT(0); |
2713 | return XFS_ERROR(EIO); | |
2714 | } | |
2715 | } | |
2716 | ||
2717 | STATIC int | |
2718 | xlog_recover_commit_pass2( | |
f7bdf03a MT |
2719 | struct xlog *log, |
2720 | struct xlog_recover *trans, | |
2721 | struct list_head *buffer_list, | |
2722 | struct xlog_recover_item *item) | |
c9f71f5f CH |
2723 | { |
2724 | trace_xfs_log_recover_item_recover(log, trans, item, XLOG_RECOVER_PASS2); | |
2725 | ||
2726 | switch (ITEM_TYPE(item)) { | |
2727 | case XFS_LI_BUF: | |
43ff2122 | 2728 | return xlog_recover_buffer_pass2(log, buffer_list, item); |
c9f71f5f | 2729 | case XFS_LI_INODE: |
43ff2122 | 2730 | return xlog_recover_inode_pass2(log, buffer_list, item); |
c9f71f5f CH |
2731 | case XFS_LI_EFI: |
2732 | return xlog_recover_efi_pass2(log, item, trans->r_lsn); | |
2733 | case XFS_LI_EFD: | |
2734 | return xlog_recover_efd_pass2(log, item); | |
d0450948 | 2735 | case XFS_LI_DQUOT: |
43ff2122 | 2736 | return xlog_recover_dquot_pass2(log, buffer_list, item); |
d0450948 | 2737 | case XFS_LI_QUOTAOFF: |
c9f71f5f CH |
2738 | /* nothing to do in pass2 */ |
2739 | return 0; | |
d0450948 | 2740 | default: |
a0fa2b67 DC |
2741 | xfs_warn(log->l_mp, "%s: invalid item type (%d)", |
2742 | __func__, ITEM_TYPE(item)); | |
d0450948 CH |
2743 | ASSERT(0); |
2744 | return XFS_ERROR(EIO); | |
2745 | } | |
2746 | } | |
2747 | ||
2748 | /* | |
2749 | * Perform the transaction. | |
2750 | * | |
2751 | * If the transaction modifies a buffer or inode, do it now. Otherwise, | |
2752 | * EFIs and EFDs get queued up by adding entries into the AIL for them. | |
2753 | */ | |
1da177e4 LT |
2754 | STATIC int |
2755 | xlog_recover_commit_trans( | |
f7bdf03a | 2756 | struct xlog *log, |
d0450948 | 2757 | struct xlog_recover *trans, |
1da177e4 LT |
2758 | int pass) |
2759 | { | |
43ff2122 | 2760 | int error = 0, error2; |
d0450948 | 2761 | xlog_recover_item_t *item; |
43ff2122 | 2762 | LIST_HEAD (buffer_list); |
1da177e4 | 2763 | |
f0a76953 | 2764 | hlist_del(&trans->r_list); |
d0450948 CH |
2765 | |
2766 | error = xlog_recover_reorder_trans(log, trans, pass); | |
2767 | if (error) | |
1da177e4 | 2768 | return error; |
d0450948 CH |
2769 | |
2770 | list_for_each_entry(item, &trans->r_itemq, ri_list) { | |
43ff2122 CH |
2771 | switch (pass) { |
2772 | case XLOG_RECOVER_PASS1: | |
c9f71f5f | 2773 | error = xlog_recover_commit_pass1(log, trans, item); |
43ff2122 CH |
2774 | break; |
2775 | case XLOG_RECOVER_PASS2: | |
2776 | error = xlog_recover_commit_pass2(log, trans, | |
2777 | &buffer_list, item); | |
2778 | break; | |
2779 | default: | |
2780 | ASSERT(0); | |
2781 | } | |
2782 | ||
d0450948 | 2783 | if (error) |
43ff2122 | 2784 | goto out; |
d0450948 CH |
2785 | } |
2786 | ||
2787 | xlog_recover_free_trans(trans); | |
43ff2122 CH |
2788 | |
2789 | out: | |
2790 | error2 = xfs_buf_delwri_submit(&buffer_list); | |
2791 | return error ? error : error2; | |
1da177e4 LT |
2792 | } |
2793 | ||
2794 | STATIC int | |
2795 | xlog_recover_unmount_trans( | |
f7bdf03a MT |
2796 | struct xlog *log, |
2797 | struct xlog_recover *trans) | |
1da177e4 LT |
2798 | { |
2799 | /* Do nothing now */ | |
a0fa2b67 | 2800 | xfs_warn(log->l_mp, "%s: Unmount LR", __func__); |
1da177e4 LT |
2801 | return 0; |
2802 | } | |
2803 | ||
2804 | /* | |
2805 | * There are two valid states of the r_state field. 0 indicates that the | |
2806 | * transaction structure is in a normal state. We have either seen the | |
2807 | * start of the transaction or the last operation we added was not a partial | |
2808 | * operation. If the last operation we added to the transaction was a | |
2809 | * partial operation, we need to mark r_state with XLOG_WAS_CONT_TRANS. | |
2810 | * | |
2811 | * NOTE: skip LRs with 0 data length. | |
2812 | */ | |
2813 | STATIC int | |
2814 | xlog_recover_process_data( | |
2815 | xlog_t *log, | |
f0a76953 | 2816 | struct hlist_head rhash[], |
1da177e4 LT |
2817 | xlog_rec_header_t *rhead, |
2818 | xfs_caddr_t dp, | |
2819 | int pass) | |
2820 | { | |
2821 | xfs_caddr_t lp; | |
2822 | int num_logops; | |
2823 | xlog_op_header_t *ohead; | |
2824 | xlog_recover_t *trans; | |
2825 | xlog_tid_t tid; | |
2826 | int error; | |
2827 | unsigned long hash; | |
2828 | uint flags; | |
2829 | ||
b53e675d CH |
2830 | lp = dp + be32_to_cpu(rhead->h_len); |
2831 | num_logops = be32_to_cpu(rhead->h_num_logops); | |
1da177e4 LT |
2832 | |
2833 | /* check the log format matches our own - else we can't recover */ | |
2834 | if (xlog_header_check_recover(log->l_mp, rhead)) | |
2835 | return (XFS_ERROR(EIO)); | |
2836 | ||
2837 | while ((dp < lp) && num_logops) { | |
2838 | ASSERT(dp + sizeof(xlog_op_header_t) <= lp); | |
2839 | ohead = (xlog_op_header_t *)dp; | |
2840 | dp += sizeof(xlog_op_header_t); | |
2841 | if (ohead->oh_clientid != XFS_TRANSACTION && | |
2842 | ohead->oh_clientid != XFS_LOG) { | |
a0fa2b67 DC |
2843 | xfs_warn(log->l_mp, "%s: bad clientid 0x%x", |
2844 | __func__, ohead->oh_clientid); | |
1da177e4 LT |
2845 | ASSERT(0); |
2846 | return (XFS_ERROR(EIO)); | |
2847 | } | |
67fcb7bf | 2848 | tid = be32_to_cpu(ohead->oh_tid); |
1da177e4 | 2849 | hash = XLOG_RHASH(tid); |
f0a76953 | 2850 | trans = xlog_recover_find_tid(&rhash[hash], tid); |
1da177e4 LT |
2851 | if (trans == NULL) { /* not found; add new tid */ |
2852 | if (ohead->oh_flags & XLOG_START_TRANS) | |
2853 | xlog_recover_new_tid(&rhash[hash], tid, | |
b53e675d | 2854 | be64_to_cpu(rhead->h_lsn)); |
1da177e4 | 2855 | } else { |
9742bb93 | 2856 | if (dp + be32_to_cpu(ohead->oh_len) > lp) { |
a0fa2b67 DC |
2857 | xfs_warn(log->l_mp, "%s: bad length 0x%x", |
2858 | __func__, be32_to_cpu(ohead->oh_len)); | |
9742bb93 LM |
2859 | WARN_ON(1); |
2860 | return (XFS_ERROR(EIO)); | |
2861 | } | |
1da177e4 LT |
2862 | flags = ohead->oh_flags & ~XLOG_END_TRANS; |
2863 | if (flags & XLOG_WAS_CONT_TRANS) | |
2864 | flags &= ~XLOG_CONTINUE_TRANS; | |
2865 | switch (flags) { | |
2866 | case XLOG_COMMIT_TRANS: | |
2867 | error = xlog_recover_commit_trans(log, | |
f0a76953 | 2868 | trans, pass); |
1da177e4 LT |
2869 | break; |
2870 | case XLOG_UNMOUNT_TRANS: | |
a0fa2b67 | 2871 | error = xlog_recover_unmount_trans(log, trans); |
1da177e4 LT |
2872 | break; |
2873 | case XLOG_WAS_CONT_TRANS: | |
9abbc539 DC |
2874 | error = xlog_recover_add_to_cont_trans(log, |
2875 | trans, dp, | |
2876 | be32_to_cpu(ohead->oh_len)); | |
1da177e4 LT |
2877 | break; |
2878 | case XLOG_START_TRANS: | |
a0fa2b67 DC |
2879 | xfs_warn(log->l_mp, "%s: bad transaction", |
2880 | __func__); | |
1da177e4 LT |
2881 | ASSERT(0); |
2882 | error = XFS_ERROR(EIO); | |
2883 | break; | |
2884 | case 0: | |
2885 | case XLOG_CONTINUE_TRANS: | |
9abbc539 | 2886 | error = xlog_recover_add_to_trans(log, trans, |
67fcb7bf | 2887 | dp, be32_to_cpu(ohead->oh_len)); |
1da177e4 LT |
2888 | break; |
2889 | default: | |
a0fa2b67 DC |
2890 | xfs_warn(log->l_mp, "%s: bad flag 0x%x", |
2891 | __func__, flags); | |
1da177e4 LT |
2892 | ASSERT(0); |
2893 | error = XFS_ERROR(EIO); | |
2894 | break; | |
2895 | } | |
2896 | if (error) | |
2897 | return error; | |
2898 | } | |
67fcb7bf | 2899 | dp += be32_to_cpu(ohead->oh_len); |
1da177e4 LT |
2900 | num_logops--; |
2901 | } | |
2902 | return 0; | |
2903 | } | |
2904 | ||
2905 | /* | |
2906 | * Process an extent free intent item that was recovered from | |
2907 | * the log. We need to free the extents that it describes. | |
2908 | */ | |
3c1e2bbe | 2909 | STATIC int |
1da177e4 LT |
2910 | xlog_recover_process_efi( |
2911 | xfs_mount_t *mp, | |
2912 | xfs_efi_log_item_t *efip) | |
2913 | { | |
2914 | xfs_efd_log_item_t *efdp; | |
2915 | xfs_trans_t *tp; | |
2916 | int i; | |
3c1e2bbe | 2917 | int error = 0; |
1da177e4 LT |
2918 | xfs_extent_t *extp; |
2919 | xfs_fsblock_t startblock_fsb; | |
2920 | ||
b199c8a4 | 2921 | ASSERT(!test_bit(XFS_EFI_RECOVERED, &efip->efi_flags)); |
1da177e4 LT |
2922 | |
2923 | /* | |
2924 | * First check the validity of the extents described by the | |
2925 | * EFI. If any are bad, then assume that all are bad and | |
2926 | * just toss the EFI. | |
2927 | */ | |
2928 | for (i = 0; i < efip->efi_format.efi_nextents; i++) { | |
2929 | extp = &(efip->efi_format.efi_extents[i]); | |
2930 | startblock_fsb = XFS_BB_TO_FSB(mp, | |
2931 | XFS_FSB_TO_DADDR(mp, extp->ext_start)); | |
2932 | if ((startblock_fsb == 0) || | |
2933 | (extp->ext_len == 0) || | |
2934 | (startblock_fsb >= mp->m_sb.sb_dblocks) || | |
2935 | (extp->ext_len >= mp->m_sb.sb_agblocks)) { | |
2936 | /* | |
2937 | * This will pull the EFI from the AIL and | |
2938 | * free the memory associated with it. | |
2939 | */ | |
2940 | xfs_efi_release(efip, efip->efi_format.efi_nextents); | |
3c1e2bbe | 2941 | return XFS_ERROR(EIO); |
1da177e4 LT |
2942 | } |
2943 | } | |
2944 | ||
2945 | tp = xfs_trans_alloc(mp, 0); | |
3c1e2bbe | 2946 | error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, 0, 0); |
fc6149d8 DC |
2947 | if (error) |
2948 | goto abort_error; | |
1da177e4 LT |
2949 | efdp = xfs_trans_get_efd(tp, efip, efip->efi_format.efi_nextents); |
2950 | ||
2951 | for (i = 0; i < efip->efi_format.efi_nextents; i++) { | |
2952 | extp = &(efip->efi_format.efi_extents[i]); | |
fc6149d8 DC |
2953 | error = xfs_free_extent(tp, extp->ext_start, extp->ext_len); |
2954 | if (error) | |
2955 | goto abort_error; | |
1da177e4 LT |
2956 | xfs_trans_log_efd_extent(tp, efdp, extp->ext_start, |
2957 | extp->ext_len); | |
2958 | } | |
2959 | ||
b199c8a4 | 2960 | set_bit(XFS_EFI_RECOVERED, &efip->efi_flags); |
e5720eec | 2961 | error = xfs_trans_commit(tp, 0); |
3c1e2bbe | 2962 | return error; |
fc6149d8 DC |
2963 | |
2964 | abort_error: | |
2965 | xfs_trans_cancel(tp, XFS_TRANS_ABORT); | |
2966 | return error; | |
1da177e4 LT |
2967 | } |
2968 | ||
1da177e4 LT |
2969 | /* |
2970 | * When this is called, all of the EFIs which did not have | |
2971 | * corresponding EFDs should be in the AIL. What we do now | |
2972 | * is free the extents associated with each one. | |
2973 | * | |
2974 | * Since we process the EFIs in normal transactions, they | |
2975 | * will be removed at some point after the commit. This prevents | |
2976 | * us from just walking down the list processing each one. | |
2977 | * We'll use a flag in the EFI to skip those that we've already | |
2978 | * processed and use the AIL iteration mechanism's generation | |
2979 | * count to try to speed this up at least a bit. | |
2980 | * | |
2981 | * When we start, we know that the EFIs are the only things in | |
2982 | * the AIL. As we process them, however, other items are added | |
2983 | * to the AIL. Since everything added to the AIL must come after | |
2984 | * everything already in the AIL, we stop processing as soon as | |
2985 | * we see something other than an EFI in the AIL. | |
2986 | */ | |
3c1e2bbe | 2987 | STATIC int |
1da177e4 LT |
2988 | xlog_recover_process_efis( |
2989 | xlog_t *log) | |
2990 | { | |
2991 | xfs_log_item_t *lip; | |
2992 | xfs_efi_log_item_t *efip; | |
3c1e2bbe | 2993 | int error = 0; |
27d8d5fe | 2994 | struct xfs_ail_cursor cur; |
a9c21c1b | 2995 | struct xfs_ail *ailp; |
1da177e4 | 2996 | |
a9c21c1b DC |
2997 | ailp = log->l_ailp; |
2998 | spin_lock(&ailp->xa_lock); | |
2999 | lip = xfs_trans_ail_cursor_first(ailp, &cur, 0); | |
1da177e4 LT |
3000 | while (lip != NULL) { |
3001 | /* | |
3002 | * We're done when we see something other than an EFI. | |
27d8d5fe | 3003 | * There should be no EFIs left in the AIL now. |
1da177e4 LT |
3004 | */ |
3005 | if (lip->li_type != XFS_LI_EFI) { | |
27d8d5fe | 3006 | #ifdef DEBUG |
a9c21c1b | 3007 | for (; lip; lip = xfs_trans_ail_cursor_next(ailp, &cur)) |
27d8d5fe DC |
3008 | ASSERT(lip->li_type != XFS_LI_EFI); |
3009 | #endif | |
1da177e4 LT |
3010 | break; |
3011 | } | |
3012 | ||
3013 | /* | |
3014 | * Skip EFIs that we've already processed. | |
3015 | */ | |
3016 | efip = (xfs_efi_log_item_t *)lip; | |
b199c8a4 | 3017 | if (test_bit(XFS_EFI_RECOVERED, &efip->efi_flags)) { |
a9c21c1b | 3018 | lip = xfs_trans_ail_cursor_next(ailp, &cur); |
1da177e4 LT |
3019 | continue; |
3020 | } | |
3021 | ||
a9c21c1b DC |
3022 | spin_unlock(&ailp->xa_lock); |
3023 | error = xlog_recover_process_efi(log->l_mp, efip); | |
3024 | spin_lock(&ailp->xa_lock); | |
27d8d5fe DC |
3025 | if (error) |
3026 | goto out; | |
a9c21c1b | 3027 | lip = xfs_trans_ail_cursor_next(ailp, &cur); |
1da177e4 | 3028 | } |
27d8d5fe | 3029 | out: |
a9c21c1b DC |
3030 | xfs_trans_ail_cursor_done(ailp, &cur); |
3031 | spin_unlock(&ailp->xa_lock); | |
3c1e2bbe | 3032 | return error; |
1da177e4 LT |
3033 | } |
3034 | ||
3035 | /* | |
3036 | * This routine performs a transaction to null out a bad inode pointer | |
3037 | * in an agi unlinked inode hash bucket. | |
3038 | */ | |
3039 | STATIC void | |
3040 | xlog_recover_clear_agi_bucket( | |
3041 | xfs_mount_t *mp, | |
3042 | xfs_agnumber_t agno, | |
3043 | int bucket) | |
3044 | { | |
3045 | xfs_trans_t *tp; | |
3046 | xfs_agi_t *agi; | |
3047 | xfs_buf_t *agibp; | |
3048 | int offset; | |
3049 | int error; | |
3050 | ||
3051 | tp = xfs_trans_alloc(mp, XFS_TRANS_CLEAR_AGI_BUCKET); | |
5e1be0fb CH |
3052 | error = xfs_trans_reserve(tp, 0, XFS_CLEAR_AGI_BUCKET_LOG_RES(mp), |
3053 | 0, 0, 0); | |
e5720eec DC |
3054 | if (error) |
3055 | goto out_abort; | |
1da177e4 | 3056 | |
5e1be0fb CH |
3057 | error = xfs_read_agi(mp, tp, agno, &agibp); |
3058 | if (error) | |
e5720eec | 3059 | goto out_abort; |
1da177e4 | 3060 | |
5e1be0fb | 3061 | agi = XFS_BUF_TO_AGI(agibp); |
16259e7d | 3062 | agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO); |
1da177e4 LT |
3063 | offset = offsetof(xfs_agi_t, agi_unlinked) + |
3064 | (sizeof(xfs_agino_t) * bucket); | |
3065 | xfs_trans_log_buf(tp, agibp, offset, | |
3066 | (offset + sizeof(xfs_agino_t) - 1)); | |
3067 | ||
e5720eec DC |
3068 | error = xfs_trans_commit(tp, 0); |
3069 | if (error) | |
3070 | goto out_error; | |
3071 | return; | |
3072 | ||
3073 | out_abort: | |
3074 | xfs_trans_cancel(tp, XFS_TRANS_ABORT); | |
3075 | out_error: | |
a0fa2b67 | 3076 | xfs_warn(mp, "%s: failed to clear agi %d. Continuing.", __func__, agno); |
e5720eec | 3077 | return; |
1da177e4 LT |
3078 | } |
3079 | ||
23fac50f CH |
3080 | STATIC xfs_agino_t |
3081 | xlog_recover_process_one_iunlink( | |
3082 | struct xfs_mount *mp, | |
3083 | xfs_agnumber_t agno, | |
3084 | xfs_agino_t agino, | |
3085 | int bucket) | |
3086 | { | |
3087 | struct xfs_buf *ibp; | |
3088 | struct xfs_dinode *dip; | |
3089 | struct xfs_inode *ip; | |
3090 | xfs_ino_t ino; | |
3091 | int error; | |
3092 | ||
3093 | ino = XFS_AGINO_TO_INO(mp, agno, agino); | |
7b6259e7 | 3094 | error = xfs_iget(mp, NULL, ino, 0, 0, &ip); |
23fac50f CH |
3095 | if (error) |
3096 | goto fail; | |
3097 | ||
3098 | /* | |
3099 | * Get the on disk inode to find the next inode in the bucket. | |
3100 | */ | |
a8acad70 | 3101 | error = xfs_itobp(mp, NULL, ip, &dip, &ibp, 0); |
23fac50f | 3102 | if (error) |
0e446673 | 3103 | goto fail_iput; |
23fac50f | 3104 | |
23fac50f | 3105 | ASSERT(ip->i_d.di_nlink == 0); |
0e446673 | 3106 | ASSERT(ip->i_d.di_mode != 0); |
23fac50f CH |
3107 | |
3108 | /* setup for the next pass */ | |
3109 | agino = be32_to_cpu(dip->di_next_unlinked); | |
3110 | xfs_buf_relse(ibp); | |
3111 | ||
3112 | /* | |
3113 | * Prevent any DMAPI event from being sent when the reference on | |
3114 | * the inode is dropped. | |
3115 | */ | |
3116 | ip->i_d.di_dmevmask = 0; | |
3117 | ||
0e446673 | 3118 | IRELE(ip); |
23fac50f CH |
3119 | return agino; |
3120 | ||
0e446673 CH |
3121 | fail_iput: |
3122 | IRELE(ip); | |
23fac50f CH |
3123 | fail: |
3124 | /* | |
3125 | * We can't read in the inode this bucket points to, or this inode | |
3126 | * is messed up. Just ditch this bucket of inodes. We will lose | |
3127 | * some inodes and space, but at least we won't hang. | |
3128 | * | |
3129 | * Call xlog_recover_clear_agi_bucket() to perform a transaction to | |
3130 | * clear the inode pointer in the bucket. | |
3131 | */ | |
3132 | xlog_recover_clear_agi_bucket(mp, agno, bucket); | |
3133 | return NULLAGINO; | |
3134 | } | |
3135 | ||
1da177e4 LT |
3136 | /* |
3137 | * xlog_iunlink_recover | |
3138 | * | |
3139 | * This is called during recovery to process any inodes which | |
3140 | * we unlinked but not freed when the system crashed. These | |
3141 | * inodes will be on the lists in the AGI blocks. What we do | |
3142 | * here is scan all the AGIs and fully truncate and free any | |
3143 | * inodes found on the lists. Each inode is removed from the | |
3144 | * lists when it has been fully truncated and is freed. The | |
3145 | * freeing of the inode and its removal from the list must be | |
3146 | * atomic. | |
3147 | */ | |
d96f8f89 | 3148 | STATIC void |
1da177e4 LT |
3149 | xlog_recover_process_iunlinks( |
3150 | xlog_t *log) | |
3151 | { | |
3152 | xfs_mount_t *mp; | |
3153 | xfs_agnumber_t agno; | |
3154 | xfs_agi_t *agi; | |
3155 | xfs_buf_t *agibp; | |
1da177e4 | 3156 | xfs_agino_t agino; |
1da177e4 LT |
3157 | int bucket; |
3158 | int error; | |
3159 | uint mp_dmevmask; | |
3160 | ||
3161 | mp = log->l_mp; | |
3162 | ||
3163 | /* | |
3164 | * Prevent any DMAPI event from being sent while in this function. | |
3165 | */ | |
3166 | mp_dmevmask = mp->m_dmevmask; | |
3167 | mp->m_dmevmask = 0; | |
3168 | ||
3169 | for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) { | |
3170 | /* | |
3171 | * Find the agi for this ag. | |
3172 | */ | |
5e1be0fb CH |
3173 | error = xfs_read_agi(mp, NULL, agno, &agibp); |
3174 | if (error) { | |
3175 | /* | |
3176 | * AGI is b0rked. Don't process it. | |
3177 | * | |
3178 | * We should probably mark the filesystem as corrupt | |
3179 | * after we've recovered all the ag's we can.... | |
3180 | */ | |
3181 | continue; | |
1da177e4 | 3182 | } |
d97d32ed JK |
3183 | /* |
3184 | * Unlock the buffer so that it can be acquired in the normal | |
3185 | * course of the transaction to truncate and free each inode. | |
3186 | * Because we are not racing with anyone else here for the AGI | |
3187 | * buffer, we don't even need to hold it locked to read the | |
3188 | * initial unlinked bucket entries out of the buffer. We keep | |
3189 | * buffer reference though, so that it stays pinned in memory | |
3190 | * while we need the buffer. | |
3191 | */ | |
1da177e4 | 3192 | agi = XFS_BUF_TO_AGI(agibp); |
d97d32ed | 3193 | xfs_buf_unlock(agibp); |
1da177e4 LT |
3194 | |
3195 | for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++) { | |
16259e7d | 3196 | agino = be32_to_cpu(agi->agi_unlinked[bucket]); |
1da177e4 | 3197 | while (agino != NULLAGINO) { |
23fac50f CH |
3198 | agino = xlog_recover_process_one_iunlink(mp, |
3199 | agno, agino, bucket); | |
1da177e4 LT |
3200 | } |
3201 | } | |
d97d32ed | 3202 | xfs_buf_rele(agibp); |
1da177e4 LT |
3203 | } |
3204 | ||
3205 | mp->m_dmevmask = mp_dmevmask; | |
3206 | } | |
3207 | ||
3208 | ||
3209 | #ifdef DEBUG | |
3210 | STATIC void | |
3211 | xlog_pack_data_checksum( | |
3212 | xlog_t *log, | |
3213 | xlog_in_core_t *iclog, | |
3214 | int size) | |
3215 | { | |
3216 | int i; | |
b53e675d | 3217 | __be32 *up; |
1da177e4 LT |
3218 | uint chksum = 0; |
3219 | ||
b53e675d | 3220 | up = (__be32 *)iclog->ic_datap; |
1da177e4 LT |
3221 | /* divide length by 4 to get # words */ |
3222 | for (i = 0; i < (size >> 2); i++) { | |
b53e675d | 3223 | chksum ^= be32_to_cpu(*up); |
1da177e4 LT |
3224 | up++; |
3225 | } | |
b53e675d | 3226 | iclog->ic_header.h_chksum = cpu_to_be32(chksum); |
1da177e4 LT |
3227 | } |
3228 | #else | |
3229 | #define xlog_pack_data_checksum(log, iclog, size) | |
3230 | #endif | |
3231 | ||
3232 | /* | |
3233 | * Stamp cycle number in every block | |
3234 | */ | |
3235 | void | |
3236 | xlog_pack_data( | |
3237 | xlog_t *log, | |
3238 | xlog_in_core_t *iclog, | |
3239 | int roundoff) | |
3240 | { | |
3241 | int i, j, k; | |
3242 | int size = iclog->ic_offset + roundoff; | |
b53e675d | 3243 | __be32 cycle_lsn; |
1da177e4 | 3244 | xfs_caddr_t dp; |
1da177e4 LT |
3245 | |
3246 | xlog_pack_data_checksum(log, iclog, size); | |
3247 | ||
3248 | cycle_lsn = CYCLE_LSN_DISK(iclog->ic_header.h_lsn); | |
3249 | ||
3250 | dp = iclog->ic_datap; | |
3251 | for (i = 0; i < BTOBB(size) && | |
3252 | i < (XLOG_HEADER_CYCLE_SIZE / BBSIZE); i++) { | |
b53e675d CH |
3253 | iclog->ic_header.h_cycle_data[i] = *(__be32 *)dp; |
3254 | *(__be32 *)dp = cycle_lsn; | |
1da177e4 LT |
3255 | dp += BBSIZE; |
3256 | } | |
3257 | ||
62118709 | 3258 | if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { |
b28708d6 CH |
3259 | xlog_in_core_2_t *xhdr = iclog->ic_data; |
3260 | ||
1da177e4 LT |
3261 | for ( ; i < BTOBB(size); i++) { |
3262 | j = i / (XLOG_HEADER_CYCLE_SIZE / BBSIZE); | |
3263 | k = i % (XLOG_HEADER_CYCLE_SIZE / BBSIZE); | |
b53e675d CH |
3264 | xhdr[j].hic_xheader.xh_cycle_data[k] = *(__be32 *)dp; |
3265 | *(__be32 *)dp = cycle_lsn; | |
1da177e4 LT |
3266 | dp += BBSIZE; |
3267 | } | |
3268 | ||
3269 | for (i = 1; i < log->l_iclog_heads; i++) { | |
3270 | xhdr[i].hic_xheader.xh_cycle = cycle_lsn; | |
3271 | } | |
3272 | } | |
3273 | } | |
3274 | ||
1da177e4 LT |
3275 | STATIC void |
3276 | xlog_unpack_data( | |
3277 | xlog_rec_header_t *rhead, | |
3278 | xfs_caddr_t dp, | |
3279 | xlog_t *log) | |
3280 | { | |
3281 | int i, j, k; | |
1da177e4 | 3282 | |
b53e675d | 3283 | for (i = 0; i < BTOBB(be32_to_cpu(rhead->h_len)) && |
1da177e4 | 3284 | i < (XLOG_HEADER_CYCLE_SIZE / BBSIZE); i++) { |
b53e675d | 3285 | *(__be32 *)dp = *(__be32 *)&rhead->h_cycle_data[i]; |
1da177e4 LT |
3286 | dp += BBSIZE; |
3287 | } | |
3288 | ||
62118709 | 3289 | if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { |
b28708d6 | 3290 | xlog_in_core_2_t *xhdr = (xlog_in_core_2_t *)rhead; |
b53e675d | 3291 | for ( ; i < BTOBB(be32_to_cpu(rhead->h_len)); i++) { |
1da177e4 LT |
3292 | j = i / (XLOG_HEADER_CYCLE_SIZE / BBSIZE); |
3293 | k = i % (XLOG_HEADER_CYCLE_SIZE / BBSIZE); | |
b53e675d | 3294 | *(__be32 *)dp = xhdr[j].hic_xheader.xh_cycle_data[k]; |
1da177e4 LT |
3295 | dp += BBSIZE; |
3296 | } | |
3297 | } | |
1da177e4 LT |
3298 | } |
3299 | ||
3300 | STATIC int | |
3301 | xlog_valid_rec_header( | |
3302 | xlog_t *log, | |
3303 | xlog_rec_header_t *rhead, | |
3304 | xfs_daddr_t blkno) | |
3305 | { | |
3306 | int hlen; | |
3307 | ||
69ef921b | 3308 | if (unlikely(rhead->h_magicno != cpu_to_be32(XLOG_HEADER_MAGIC_NUM))) { |
1da177e4 LT |
3309 | XFS_ERROR_REPORT("xlog_valid_rec_header(1)", |
3310 | XFS_ERRLEVEL_LOW, log->l_mp); | |
3311 | return XFS_ERROR(EFSCORRUPTED); | |
3312 | } | |
3313 | if (unlikely( | |
3314 | (!rhead->h_version || | |
b53e675d | 3315 | (be32_to_cpu(rhead->h_version) & (~XLOG_VERSION_OKBITS))))) { |
a0fa2b67 | 3316 | xfs_warn(log->l_mp, "%s: unrecognised log version (%d).", |
34a622b2 | 3317 | __func__, be32_to_cpu(rhead->h_version)); |
1da177e4 LT |
3318 | return XFS_ERROR(EIO); |
3319 | } | |
3320 | ||
3321 | /* LR body must have data or it wouldn't have been written */ | |
b53e675d | 3322 | hlen = be32_to_cpu(rhead->h_len); |
1da177e4 LT |
3323 | if (unlikely( hlen <= 0 || hlen > INT_MAX )) { |
3324 | XFS_ERROR_REPORT("xlog_valid_rec_header(2)", | |
3325 | XFS_ERRLEVEL_LOW, log->l_mp); | |
3326 | return XFS_ERROR(EFSCORRUPTED); | |
3327 | } | |
3328 | if (unlikely( blkno > log->l_logBBsize || blkno > INT_MAX )) { | |
3329 | XFS_ERROR_REPORT("xlog_valid_rec_header(3)", | |
3330 | XFS_ERRLEVEL_LOW, log->l_mp); | |
3331 | return XFS_ERROR(EFSCORRUPTED); | |
3332 | } | |
3333 | return 0; | |
3334 | } | |
3335 | ||
3336 | /* | |
3337 | * Read the log from tail to head and process the log records found. | |
3338 | * Handle the two cases where the tail and head are in the same cycle | |
3339 | * and where the active portion of the log wraps around the end of | |
3340 | * the physical log separately. The pass parameter is passed through | |
3341 | * to the routines called to process the data and is not looked at | |
3342 | * here. | |
3343 | */ | |
3344 | STATIC int | |
3345 | xlog_do_recovery_pass( | |
3346 | xlog_t *log, | |
3347 | xfs_daddr_t head_blk, | |
3348 | xfs_daddr_t tail_blk, | |
3349 | int pass) | |
3350 | { | |
3351 | xlog_rec_header_t *rhead; | |
3352 | xfs_daddr_t blk_no; | |
fc5bc4c8 | 3353 | xfs_caddr_t offset; |
1da177e4 LT |
3354 | xfs_buf_t *hbp, *dbp; |
3355 | int error = 0, h_size; | |
3356 | int bblks, split_bblks; | |
3357 | int hblks, split_hblks, wrapped_hblks; | |
f0a76953 | 3358 | struct hlist_head rhash[XLOG_RHASH_SIZE]; |
1da177e4 LT |
3359 | |
3360 | ASSERT(head_blk != tail_blk); | |
3361 | ||
3362 | /* | |
3363 | * Read the header of the tail block and get the iclog buffer size from | |
3364 | * h_size. Use this to tell how many sectors make up the log header. | |
3365 | */ | |
62118709 | 3366 | if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { |
1da177e4 LT |
3367 | /* |
3368 | * When using variable length iclogs, read first sector of | |
3369 | * iclog header and extract the header size from it. Get a | |
3370 | * new hbp that is the correct size. | |
3371 | */ | |
3372 | hbp = xlog_get_bp(log, 1); | |
3373 | if (!hbp) | |
3374 | return ENOMEM; | |
076e6acb CH |
3375 | |
3376 | error = xlog_bread(log, tail_blk, 1, hbp, &offset); | |
3377 | if (error) | |
1da177e4 | 3378 | goto bread_err1; |
076e6acb | 3379 | |
1da177e4 LT |
3380 | rhead = (xlog_rec_header_t *)offset; |
3381 | error = xlog_valid_rec_header(log, rhead, tail_blk); | |
3382 | if (error) | |
3383 | goto bread_err1; | |
b53e675d CH |
3384 | h_size = be32_to_cpu(rhead->h_size); |
3385 | if ((be32_to_cpu(rhead->h_version) & XLOG_VERSION_2) && | |
1da177e4 LT |
3386 | (h_size > XLOG_HEADER_CYCLE_SIZE)) { |
3387 | hblks = h_size / XLOG_HEADER_CYCLE_SIZE; | |
3388 | if (h_size % XLOG_HEADER_CYCLE_SIZE) | |
3389 | hblks++; | |
3390 | xlog_put_bp(hbp); | |
3391 | hbp = xlog_get_bp(log, hblks); | |
3392 | } else { | |
3393 | hblks = 1; | |
3394 | } | |
3395 | } else { | |
69ce58f0 | 3396 | ASSERT(log->l_sectBBsize == 1); |
1da177e4 LT |
3397 | hblks = 1; |
3398 | hbp = xlog_get_bp(log, 1); | |
3399 | h_size = XLOG_BIG_RECORD_BSIZE; | |
3400 | } | |
3401 | ||
3402 | if (!hbp) | |
3403 | return ENOMEM; | |
3404 | dbp = xlog_get_bp(log, BTOBB(h_size)); | |
3405 | if (!dbp) { | |
3406 | xlog_put_bp(hbp); | |
3407 | return ENOMEM; | |
3408 | } | |
3409 | ||
3410 | memset(rhash, 0, sizeof(rhash)); | |
3411 | if (tail_blk <= head_blk) { | |
3412 | for (blk_no = tail_blk; blk_no < head_blk; ) { | |
076e6acb CH |
3413 | error = xlog_bread(log, blk_no, hblks, hbp, &offset); |
3414 | if (error) | |
1da177e4 | 3415 | goto bread_err2; |
076e6acb | 3416 | |
1da177e4 LT |
3417 | rhead = (xlog_rec_header_t *)offset; |
3418 | error = xlog_valid_rec_header(log, rhead, blk_no); | |
3419 | if (error) | |
3420 | goto bread_err2; | |
3421 | ||
3422 | /* blocks in data section */ | |
b53e675d | 3423 | bblks = (int)BTOBB(be32_to_cpu(rhead->h_len)); |
076e6acb CH |
3424 | error = xlog_bread(log, blk_no + hblks, bblks, dbp, |
3425 | &offset); | |
1da177e4 LT |
3426 | if (error) |
3427 | goto bread_err2; | |
076e6acb | 3428 | |
1da177e4 LT |
3429 | xlog_unpack_data(rhead, offset, log); |
3430 | if ((error = xlog_recover_process_data(log, | |
3431 | rhash, rhead, offset, pass))) | |
3432 | goto bread_err2; | |
3433 | blk_no += bblks + hblks; | |
3434 | } | |
3435 | } else { | |
3436 | /* | |
3437 | * Perform recovery around the end of the physical log. | |
3438 | * When the head is not on the same cycle number as the tail, | |
3439 | * we can't do a sequential recovery as above. | |
3440 | */ | |
3441 | blk_no = tail_blk; | |
3442 | while (blk_no < log->l_logBBsize) { | |
3443 | /* | |
3444 | * Check for header wrapping around physical end-of-log | |
3445 | */ | |
62926044 | 3446 | offset = hbp->b_addr; |
1da177e4 LT |
3447 | split_hblks = 0; |
3448 | wrapped_hblks = 0; | |
3449 | if (blk_no + hblks <= log->l_logBBsize) { | |
3450 | /* Read header in one read */ | |
076e6acb CH |
3451 | error = xlog_bread(log, blk_no, hblks, hbp, |
3452 | &offset); | |
1da177e4 LT |
3453 | if (error) |
3454 | goto bread_err2; | |
1da177e4 LT |
3455 | } else { |
3456 | /* This LR is split across physical log end */ | |
3457 | if (blk_no != log->l_logBBsize) { | |
3458 | /* some data before physical log end */ | |
3459 | ASSERT(blk_no <= INT_MAX); | |
3460 | split_hblks = log->l_logBBsize - (int)blk_no; | |
3461 | ASSERT(split_hblks > 0); | |
076e6acb CH |
3462 | error = xlog_bread(log, blk_no, |
3463 | split_hblks, hbp, | |
3464 | &offset); | |
3465 | if (error) | |
1da177e4 | 3466 | goto bread_err2; |
1da177e4 | 3467 | } |
076e6acb | 3468 | |
1da177e4 LT |
3469 | /* |
3470 | * Note: this black magic still works with | |
3471 | * large sector sizes (non-512) only because: | |
3472 | * - we increased the buffer size originally | |
3473 | * by 1 sector giving us enough extra space | |
3474 | * for the second read; | |
3475 | * - the log start is guaranteed to be sector | |
3476 | * aligned; | |
3477 | * - we read the log end (LR header start) | |
3478 | * _first_, then the log start (LR header end) | |
3479 | * - order is important. | |
3480 | */ | |
234f56ac | 3481 | wrapped_hblks = hblks - split_hblks; |
44396476 DC |
3482 | error = xlog_bread_offset(log, 0, |
3483 | wrapped_hblks, hbp, | |
3484 | offset + BBTOB(split_hblks)); | |
1da177e4 LT |
3485 | if (error) |
3486 | goto bread_err2; | |
1da177e4 LT |
3487 | } |
3488 | rhead = (xlog_rec_header_t *)offset; | |
3489 | error = xlog_valid_rec_header(log, rhead, | |
3490 | split_hblks ? blk_no : 0); | |
3491 | if (error) | |
3492 | goto bread_err2; | |
3493 | ||
b53e675d | 3494 | bblks = (int)BTOBB(be32_to_cpu(rhead->h_len)); |
1da177e4 LT |
3495 | blk_no += hblks; |
3496 | ||
3497 | /* Read in data for log record */ | |
3498 | if (blk_no + bblks <= log->l_logBBsize) { | |
076e6acb CH |
3499 | error = xlog_bread(log, blk_no, bblks, dbp, |
3500 | &offset); | |
1da177e4 LT |
3501 | if (error) |
3502 | goto bread_err2; | |
1da177e4 LT |
3503 | } else { |
3504 | /* This log record is split across the | |
3505 | * physical end of log */ | |
62926044 | 3506 | offset = dbp->b_addr; |
1da177e4 LT |
3507 | split_bblks = 0; |
3508 | if (blk_no != log->l_logBBsize) { | |
3509 | /* some data is before the physical | |
3510 | * end of log */ | |
3511 | ASSERT(!wrapped_hblks); | |
3512 | ASSERT(blk_no <= INT_MAX); | |
3513 | split_bblks = | |
3514 | log->l_logBBsize - (int)blk_no; | |
3515 | ASSERT(split_bblks > 0); | |
076e6acb CH |
3516 | error = xlog_bread(log, blk_no, |
3517 | split_bblks, dbp, | |
3518 | &offset); | |
3519 | if (error) | |
1da177e4 | 3520 | goto bread_err2; |
1da177e4 | 3521 | } |
076e6acb | 3522 | |
1da177e4 LT |
3523 | /* |
3524 | * Note: this black magic still works with | |
3525 | * large sector sizes (non-512) only because: | |
3526 | * - we increased the buffer size originally | |
3527 | * by 1 sector giving us enough extra space | |
3528 | * for the second read; | |
3529 | * - the log start is guaranteed to be sector | |
3530 | * aligned; | |
3531 | * - we read the log end (LR header start) | |
3532 | * _first_, then the log start (LR header end) | |
3533 | * - order is important. | |
3534 | */ | |
44396476 DC |
3535 | error = xlog_bread_offset(log, 0, |
3536 | bblks - split_bblks, hbp, | |
3537 | offset + BBTOB(split_bblks)); | |
076e6acb CH |
3538 | if (error) |
3539 | goto bread_err2; | |
1da177e4 LT |
3540 | } |
3541 | xlog_unpack_data(rhead, offset, log); | |
3542 | if ((error = xlog_recover_process_data(log, rhash, | |
3543 | rhead, offset, pass))) | |
3544 | goto bread_err2; | |
3545 | blk_no += bblks; | |
3546 | } | |
3547 | ||
3548 | ASSERT(blk_no >= log->l_logBBsize); | |
3549 | blk_no -= log->l_logBBsize; | |
3550 | ||
3551 | /* read first part of physical log */ | |
3552 | while (blk_no < head_blk) { | |
076e6acb CH |
3553 | error = xlog_bread(log, blk_no, hblks, hbp, &offset); |
3554 | if (error) | |
1da177e4 | 3555 | goto bread_err2; |
076e6acb | 3556 | |
1da177e4 LT |
3557 | rhead = (xlog_rec_header_t *)offset; |
3558 | error = xlog_valid_rec_header(log, rhead, blk_no); | |
3559 | if (error) | |
3560 | goto bread_err2; | |
076e6acb | 3561 | |
b53e675d | 3562 | bblks = (int)BTOBB(be32_to_cpu(rhead->h_len)); |
076e6acb CH |
3563 | error = xlog_bread(log, blk_no+hblks, bblks, dbp, |
3564 | &offset); | |
3565 | if (error) | |
1da177e4 | 3566 | goto bread_err2; |
076e6acb | 3567 | |
1da177e4 LT |
3568 | xlog_unpack_data(rhead, offset, log); |
3569 | if ((error = xlog_recover_process_data(log, rhash, | |
3570 | rhead, offset, pass))) | |
3571 | goto bread_err2; | |
3572 | blk_no += bblks + hblks; | |
3573 | } | |
3574 | } | |
3575 | ||
3576 | bread_err2: | |
3577 | xlog_put_bp(dbp); | |
3578 | bread_err1: | |
3579 | xlog_put_bp(hbp); | |
3580 | return error; | |
3581 | } | |
3582 | ||
3583 | /* | |
3584 | * Do the recovery of the log. We actually do this in two phases. | |
3585 | * The two passes are necessary in order to implement the function | |
3586 | * of cancelling a record written into the log. The first pass | |
3587 | * determines those things which have been cancelled, and the | |
3588 | * second pass replays log items normally except for those which | |
3589 | * have been cancelled. The handling of the replay and cancellations | |
3590 | * takes place in the log item type specific routines. | |
3591 | * | |
3592 | * The table of items which have cancel records in the log is allocated | |
3593 | * and freed at this level, since only here do we know when all of | |
3594 | * the log recovery has been completed. | |
3595 | */ | |
3596 | STATIC int | |
3597 | xlog_do_log_recovery( | |
3598 | xlog_t *log, | |
3599 | xfs_daddr_t head_blk, | |
3600 | xfs_daddr_t tail_blk) | |
3601 | { | |
d5689eaa | 3602 | int error, i; |
1da177e4 LT |
3603 | |
3604 | ASSERT(head_blk != tail_blk); | |
3605 | ||
3606 | /* | |
3607 | * First do a pass to find all of the cancelled buf log items. | |
3608 | * Store them in the buf_cancel_table for use in the second pass. | |
3609 | */ | |
d5689eaa CH |
3610 | log->l_buf_cancel_table = kmem_zalloc(XLOG_BC_TABLE_SIZE * |
3611 | sizeof(struct list_head), | |
1da177e4 | 3612 | KM_SLEEP); |
d5689eaa CH |
3613 | for (i = 0; i < XLOG_BC_TABLE_SIZE; i++) |
3614 | INIT_LIST_HEAD(&log->l_buf_cancel_table[i]); | |
3615 | ||
1da177e4 LT |
3616 | error = xlog_do_recovery_pass(log, head_blk, tail_blk, |
3617 | XLOG_RECOVER_PASS1); | |
3618 | if (error != 0) { | |
f0e2d93c | 3619 | kmem_free(log->l_buf_cancel_table); |
1da177e4 LT |
3620 | log->l_buf_cancel_table = NULL; |
3621 | return error; | |
3622 | } | |
3623 | /* | |
3624 | * Then do a second pass to actually recover the items in the log. | |
3625 | * When it is complete free the table of buf cancel items. | |
3626 | */ | |
3627 | error = xlog_do_recovery_pass(log, head_blk, tail_blk, | |
3628 | XLOG_RECOVER_PASS2); | |
3629 | #ifdef DEBUG | |
6d192a9b | 3630 | if (!error) { |
1da177e4 LT |
3631 | int i; |
3632 | ||
3633 | for (i = 0; i < XLOG_BC_TABLE_SIZE; i++) | |
d5689eaa | 3634 | ASSERT(list_empty(&log->l_buf_cancel_table[i])); |
1da177e4 LT |
3635 | } |
3636 | #endif /* DEBUG */ | |
3637 | ||
f0e2d93c | 3638 | kmem_free(log->l_buf_cancel_table); |
1da177e4 LT |
3639 | log->l_buf_cancel_table = NULL; |
3640 | ||
3641 | return error; | |
3642 | } | |
3643 | ||
3644 | /* | |
3645 | * Do the actual recovery | |
3646 | */ | |
3647 | STATIC int | |
3648 | xlog_do_recover( | |
3649 | xlog_t *log, | |
3650 | xfs_daddr_t head_blk, | |
3651 | xfs_daddr_t tail_blk) | |
3652 | { | |
3653 | int error; | |
3654 | xfs_buf_t *bp; | |
3655 | xfs_sb_t *sbp; | |
3656 | ||
3657 | /* | |
3658 | * First replay the images in the log. | |
3659 | */ | |
3660 | error = xlog_do_log_recovery(log, head_blk, tail_blk); | |
43ff2122 | 3661 | if (error) |
1da177e4 | 3662 | return error; |
1da177e4 LT |
3663 | |
3664 | /* | |
3665 | * If IO errors happened during recovery, bail out. | |
3666 | */ | |
3667 | if (XFS_FORCED_SHUTDOWN(log->l_mp)) { | |
3668 | return (EIO); | |
3669 | } | |
3670 | ||
3671 | /* | |
3672 | * We now update the tail_lsn since much of the recovery has completed | |
3673 | * and there may be space available to use. If there were no extent | |
3674 | * or iunlinks, we can free up the entire log and set the tail_lsn to | |
3675 | * be the last_sync_lsn. This was set in xlog_find_tail to be the | |
3676 | * lsn of the last known good LR on disk. If there are extent frees | |
3677 | * or iunlinks they will have some entries in the AIL; so we look at | |
3678 | * the AIL to determine how to set the tail_lsn. | |
3679 | */ | |
3680 | xlog_assign_tail_lsn(log->l_mp); | |
3681 | ||
3682 | /* | |
3683 | * Now that we've finished replaying all buffer and inode | |
3684 | * updates, re-read in the superblock. | |
3685 | */ | |
3686 | bp = xfs_getsb(log->l_mp, 0); | |
3687 | XFS_BUF_UNDONE(bp); | |
bebf963f | 3688 | ASSERT(!(XFS_BUF_ISWRITE(bp))); |
1da177e4 | 3689 | XFS_BUF_READ(bp); |
bebf963f | 3690 | XFS_BUF_UNASYNC(bp); |
1da177e4 | 3691 | xfsbdstrat(log->l_mp, bp); |
1a1a3e97 | 3692 | error = xfs_buf_iowait(bp); |
d64e31a2 | 3693 | if (error) { |
901796af | 3694 | xfs_buf_ioerror_alert(bp, __func__); |
1da177e4 LT |
3695 | ASSERT(0); |
3696 | xfs_buf_relse(bp); | |
3697 | return error; | |
3698 | } | |
3699 | ||
3700 | /* Convert superblock from on-disk format */ | |
3701 | sbp = &log->l_mp->m_sb; | |
6bd92a23 | 3702 | xfs_sb_from_disk(log->l_mp, XFS_BUF_TO_SBP(bp)); |
1da177e4 | 3703 | ASSERT(sbp->sb_magicnum == XFS_SB_MAGIC); |
62118709 | 3704 | ASSERT(xfs_sb_good_version(sbp)); |
1da177e4 LT |
3705 | xfs_buf_relse(bp); |
3706 | ||
5478eead LM |
3707 | /* We've re-read the superblock so re-initialize per-cpu counters */ |
3708 | xfs_icsb_reinit_counters(log->l_mp); | |
3709 | ||
1da177e4 LT |
3710 | xlog_recover_check_summary(log); |
3711 | ||
3712 | /* Normal transactions can now occur */ | |
3713 | log->l_flags &= ~XLOG_ACTIVE_RECOVERY; | |
3714 | return 0; | |
3715 | } | |
3716 | ||
3717 | /* | |
3718 | * Perform recovery and re-initialize some log variables in xlog_find_tail. | |
3719 | * | |
3720 | * Return error or zero. | |
3721 | */ | |
3722 | int | |
3723 | xlog_recover( | |
65be6054 | 3724 | xlog_t *log) |
1da177e4 LT |
3725 | { |
3726 | xfs_daddr_t head_blk, tail_blk; | |
3727 | int error; | |
3728 | ||
3729 | /* find the tail of the log */ | |
65be6054 | 3730 | if ((error = xlog_find_tail(log, &head_blk, &tail_blk))) |
1da177e4 LT |
3731 | return error; |
3732 | ||
3733 | if (tail_blk != head_blk) { | |
3734 | /* There used to be a comment here: | |
3735 | * | |
3736 | * disallow recovery on read-only mounts. note -- mount | |
3737 | * checks for ENOSPC and turns it into an intelligent | |
3738 | * error message. | |
3739 | * ...but this is no longer true. Now, unless you specify | |
3740 | * NORECOVERY (in which case this function would never be | |
3741 | * called), we just go ahead and recover. We do this all | |
3742 | * under the vfs layer, so we can get away with it unless | |
3743 | * the device itself is read-only, in which case we fail. | |
3744 | */ | |
3a02ee18 | 3745 | if ((error = xfs_dev_is_read_only(log->l_mp, "recovery"))) { |
1da177e4 LT |
3746 | return error; |
3747 | } | |
3748 | ||
a0fa2b67 DC |
3749 | xfs_notice(log->l_mp, "Starting recovery (logdev: %s)", |
3750 | log->l_mp->m_logname ? log->l_mp->m_logname | |
3751 | : "internal"); | |
1da177e4 LT |
3752 | |
3753 | error = xlog_do_recover(log, head_blk, tail_blk); | |
3754 | log->l_flags |= XLOG_RECOVERY_NEEDED; | |
3755 | } | |
3756 | return error; | |
3757 | } | |
3758 | ||
3759 | /* | |
3760 | * In the first part of recovery we replay inodes and buffers and build | |
3761 | * up the list of extent free items which need to be processed. Here | |
3762 | * we process the extent free items and clean up the on disk unlinked | |
3763 | * inode lists. This is separated from the first part of recovery so | |
3764 | * that the root and real-time bitmap inodes can be read in from disk in | |
3765 | * between the two stages. This is necessary so that we can free space | |
3766 | * in the real-time portion of the file system. | |
3767 | */ | |
3768 | int | |
3769 | xlog_recover_finish( | |
4249023a | 3770 | xlog_t *log) |
1da177e4 LT |
3771 | { |
3772 | /* | |
3773 | * Now we're ready to do the transactions needed for the | |
3774 | * rest of recovery. Start with completing all the extent | |
3775 | * free intent records and then process the unlinked inode | |
3776 | * lists. At this point, we essentially run in normal mode | |
3777 | * except that we're still performing recovery actions | |
3778 | * rather than accepting new requests. | |
3779 | */ | |
3780 | if (log->l_flags & XLOG_RECOVERY_NEEDED) { | |
3c1e2bbe DC |
3781 | int error; |
3782 | error = xlog_recover_process_efis(log); | |
3783 | if (error) { | |
a0fa2b67 | 3784 | xfs_alert(log->l_mp, "Failed to recover EFIs"); |
3c1e2bbe DC |
3785 | return error; |
3786 | } | |
1da177e4 LT |
3787 | /* |
3788 | * Sync the log to get all the EFIs out of the AIL. | |
3789 | * This isn't absolutely necessary, but it helps in | |
3790 | * case the unlink transactions would have problems | |
3791 | * pushing the EFIs out of the way. | |
3792 | */ | |
a14a348b | 3793 | xfs_log_force(log->l_mp, XFS_LOG_SYNC); |
1da177e4 | 3794 | |
4249023a | 3795 | xlog_recover_process_iunlinks(log); |
1da177e4 LT |
3796 | |
3797 | xlog_recover_check_summary(log); | |
3798 | ||
a0fa2b67 DC |
3799 | xfs_notice(log->l_mp, "Ending recovery (logdev: %s)", |
3800 | log->l_mp->m_logname ? log->l_mp->m_logname | |
3801 | : "internal"); | |
1da177e4 LT |
3802 | log->l_flags &= ~XLOG_RECOVERY_NEEDED; |
3803 | } else { | |
a0fa2b67 | 3804 | xfs_info(log->l_mp, "Ending clean mount"); |
1da177e4 LT |
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) { | |
a0fa2b67 DC |
3837 | xfs_alert(mp, "%s agf read failed agno %d error %d", |
3838 | __func__, agno, error); | |
4805621a FCH |
3839 | } else { |
3840 | agfp = XFS_BUF_TO_AGF(agfbp); | |
3841 | freeblks += be32_to_cpu(agfp->agf_freeblks) + | |
3842 | be32_to_cpu(agfp->agf_flcount); | |
3843 | xfs_buf_relse(agfbp); | |
1da177e4 | 3844 | } |
1da177e4 | 3845 | |
5e1be0fb | 3846 | error = xfs_read_agi(mp, NULL, agno, &agibp); |
a0fa2b67 DC |
3847 | if (error) { |
3848 | xfs_alert(mp, "%s agi read failed agno %d error %d", | |
3849 | __func__, agno, error); | |
3850 | } else { | |
5e1be0fb | 3851 | struct xfs_agi *agi = XFS_BUF_TO_AGI(agibp); |
16259e7d | 3852 | |
5e1be0fb CH |
3853 | itotal += be32_to_cpu(agi->agi_count); |
3854 | ifree += be32_to_cpu(agi->agi_freecount); | |
3855 | xfs_buf_relse(agibp); | |
3856 | } | |
1da177e4 | 3857 | } |
1da177e4 LT |
3858 | } |
3859 | #endif /* DEBUG */ |