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1 | /* | |
2 | * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc. | |
3 | * All Rights Reserved. | |
4 | * | |
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 | |
7 | * published by the Free Software Foundation. | |
8 | * | |
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. | |
13 | * | |
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 | |
17 | */ | |
18 | #include "xfs.h" | |
19 | #include "xfs_fs.h" | |
20 | #include "xfs_format.h" | |
21 | #include "xfs_log_format.h" | |
22 | #include "xfs_trans_resv.h" | |
23 | #include "xfs_mount.h" | |
24 | #include "xfs_inode.h" | |
25 | #include "xfs_trans.h" | |
26 | #include "xfs_inode_item.h" | |
27 | #include "xfs_error.h" | |
28 | #include "xfs_trace.h" | |
29 | #include "xfs_trans_priv.h" | |
30 | #include "xfs_log.h" | |
31 | ||
32 | ||
33 | kmem_zone_t *xfs_ili_zone; /* inode log item zone */ | |
34 | ||
35 | static inline struct xfs_inode_log_item *INODE_ITEM(struct xfs_log_item *lip) | |
36 | { | |
37 | return container_of(lip, struct xfs_inode_log_item, ili_item); | |
38 | } | |
39 | ||
40 | STATIC void | |
41 | xfs_inode_item_data_fork_size( | |
42 | struct xfs_inode_log_item *iip, | |
43 | int *nvecs, | |
44 | int *nbytes) | |
45 | { | |
46 | struct xfs_inode *ip = iip->ili_inode; | |
47 | ||
48 | switch (ip->i_d.di_format) { | |
49 | case XFS_DINODE_FMT_EXTENTS: | |
50 | if ((iip->ili_fields & XFS_ILOG_DEXT) && | |
51 | ip->i_d.di_nextents > 0 && | |
52 | ip->i_df.if_bytes > 0) { | |
53 | /* worst case, doesn't subtract delalloc extents */ | |
54 | *nbytes += XFS_IFORK_DSIZE(ip); | |
55 | *nvecs += 1; | |
56 | } | |
57 | break; | |
58 | case XFS_DINODE_FMT_BTREE: | |
59 | if ((iip->ili_fields & XFS_ILOG_DBROOT) && | |
60 | ip->i_df.if_broot_bytes > 0) { | |
61 | *nbytes += ip->i_df.if_broot_bytes; | |
62 | *nvecs += 1; | |
63 | } | |
64 | break; | |
65 | case XFS_DINODE_FMT_LOCAL: | |
66 | if ((iip->ili_fields & XFS_ILOG_DDATA) && | |
67 | ip->i_df.if_bytes > 0) { | |
68 | *nbytes += roundup(ip->i_df.if_bytes, 4); | |
69 | *nvecs += 1; | |
70 | } | |
71 | break; | |
72 | ||
73 | case XFS_DINODE_FMT_DEV: | |
74 | case XFS_DINODE_FMT_UUID: | |
75 | break; | |
76 | default: | |
77 | ASSERT(0); | |
78 | break; | |
79 | } | |
80 | } | |
81 | ||
82 | STATIC void | |
83 | xfs_inode_item_attr_fork_size( | |
84 | struct xfs_inode_log_item *iip, | |
85 | int *nvecs, | |
86 | int *nbytes) | |
87 | { | |
88 | struct xfs_inode *ip = iip->ili_inode; | |
89 | ||
90 | switch (ip->i_d.di_aformat) { | |
91 | case XFS_DINODE_FMT_EXTENTS: | |
92 | if ((iip->ili_fields & XFS_ILOG_AEXT) && | |
93 | ip->i_d.di_anextents > 0 && | |
94 | ip->i_afp->if_bytes > 0) { | |
95 | /* worst case, doesn't subtract unused space */ | |
96 | *nbytes += XFS_IFORK_ASIZE(ip); | |
97 | *nvecs += 1; | |
98 | } | |
99 | break; | |
100 | case XFS_DINODE_FMT_BTREE: | |
101 | if ((iip->ili_fields & XFS_ILOG_ABROOT) && | |
102 | ip->i_afp->if_broot_bytes > 0) { | |
103 | *nbytes += ip->i_afp->if_broot_bytes; | |
104 | *nvecs += 1; | |
105 | } | |
106 | break; | |
107 | case XFS_DINODE_FMT_LOCAL: | |
108 | if ((iip->ili_fields & XFS_ILOG_ADATA) && | |
109 | ip->i_afp->if_bytes > 0) { | |
110 | *nbytes += roundup(ip->i_afp->if_bytes, 4); | |
111 | *nvecs += 1; | |
112 | } | |
113 | break; | |
114 | default: | |
115 | ASSERT(0); | |
116 | break; | |
117 | } | |
118 | } | |
119 | ||
120 | /* | |
121 | * This returns the number of iovecs needed to log the given inode item. | |
122 | * | |
123 | * We need one iovec for the inode log format structure, one for the | |
124 | * inode core, and possibly one for the inode data/extents/b-tree root | |
125 | * and one for the inode attribute data/extents/b-tree root. | |
126 | */ | |
127 | STATIC void | |
128 | xfs_inode_item_size( | |
129 | struct xfs_log_item *lip, | |
130 | int *nvecs, | |
131 | int *nbytes) | |
132 | { | |
133 | struct xfs_inode_log_item *iip = INODE_ITEM(lip); | |
134 | struct xfs_inode *ip = iip->ili_inode; | |
135 | ||
136 | *nvecs += 2; | |
137 | *nbytes += sizeof(struct xfs_inode_log_format) + | |
138 | xfs_icdinode_size(ip->i_d.di_version); | |
139 | ||
140 | xfs_inode_item_data_fork_size(iip, nvecs, nbytes); | |
141 | if (XFS_IFORK_Q(ip)) | |
142 | xfs_inode_item_attr_fork_size(iip, nvecs, nbytes); | |
143 | } | |
144 | ||
145 | STATIC void | |
146 | xfs_inode_item_format_data_fork( | |
147 | struct xfs_inode_log_item *iip, | |
148 | struct xfs_inode_log_format *ilf, | |
149 | struct xfs_log_vec *lv, | |
150 | struct xfs_log_iovec **vecp) | |
151 | { | |
152 | struct xfs_inode *ip = iip->ili_inode; | |
153 | size_t data_bytes; | |
154 | ||
155 | switch (ip->i_d.di_format) { | |
156 | case XFS_DINODE_FMT_EXTENTS: | |
157 | iip->ili_fields &= | |
158 | ~(XFS_ILOG_DDATA | XFS_ILOG_DBROOT | | |
159 | XFS_ILOG_DEV | XFS_ILOG_UUID); | |
160 | ||
161 | if ((iip->ili_fields & XFS_ILOG_DEXT) && | |
162 | ip->i_d.di_nextents > 0 && | |
163 | ip->i_df.if_bytes > 0) { | |
164 | struct xfs_bmbt_rec *p; | |
165 | ||
166 | ASSERT(ip->i_df.if_u1.if_extents != NULL); | |
167 | ASSERT(ip->i_df.if_bytes / sizeof(xfs_bmbt_rec_t) > 0); | |
168 | ||
169 | p = xlog_prepare_iovec(lv, vecp, XLOG_REG_TYPE_IEXT); | |
170 | data_bytes = xfs_iextents_copy(ip, p, XFS_DATA_FORK); | |
171 | xlog_finish_iovec(lv, *vecp, data_bytes); | |
172 | ||
173 | ASSERT(data_bytes <= ip->i_df.if_bytes); | |
174 | ||
175 | ilf->ilf_dsize = data_bytes; | |
176 | ilf->ilf_size++; | |
177 | } else { | |
178 | iip->ili_fields &= ~XFS_ILOG_DEXT; | |
179 | } | |
180 | break; | |
181 | case XFS_DINODE_FMT_BTREE: | |
182 | iip->ili_fields &= | |
183 | ~(XFS_ILOG_DDATA | XFS_ILOG_DEXT | | |
184 | XFS_ILOG_DEV | XFS_ILOG_UUID); | |
185 | ||
186 | if ((iip->ili_fields & XFS_ILOG_DBROOT) && | |
187 | ip->i_df.if_broot_bytes > 0) { | |
188 | ASSERT(ip->i_df.if_broot != NULL); | |
189 | xlog_copy_iovec(lv, vecp, XLOG_REG_TYPE_IBROOT, | |
190 | ip->i_df.if_broot, | |
191 | ip->i_df.if_broot_bytes); | |
192 | ilf->ilf_dsize = ip->i_df.if_broot_bytes; | |
193 | ilf->ilf_size++; | |
194 | } else { | |
195 | ASSERT(!(iip->ili_fields & | |
196 | XFS_ILOG_DBROOT)); | |
197 | iip->ili_fields &= ~XFS_ILOG_DBROOT; | |
198 | } | |
199 | break; | |
200 | case XFS_DINODE_FMT_LOCAL: | |
201 | iip->ili_fields &= | |
202 | ~(XFS_ILOG_DEXT | XFS_ILOG_DBROOT | | |
203 | XFS_ILOG_DEV | XFS_ILOG_UUID); | |
204 | if ((iip->ili_fields & XFS_ILOG_DDATA) && | |
205 | ip->i_df.if_bytes > 0) { | |
206 | /* | |
207 | * Round i_bytes up to a word boundary. | |
208 | * The underlying memory is guaranteed to | |
209 | * to be there by xfs_idata_realloc(). | |
210 | */ | |
211 | data_bytes = roundup(ip->i_df.if_bytes, 4); | |
212 | ASSERT(ip->i_df.if_real_bytes == 0 || | |
213 | ip->i_df.if_real_bytes == data_bytes); | |
214 | ASSERT(ip->i_df.if_u1.if_data != NULL); | |
215 | ASSERT(ip->i_d.di_size > 0); | |
216 | xlog_copy_iovec(lv, vecp, XLOG_REG_TYPE_ILOCAL, | |
217 | ip->i_df.if_u1.if_data, data_bytes); | |
218 | ilf->ilf_dsize = (unsigned)data_bytes; | |
219 | ilf->ilf_size++; | |
220 | } else { | |
221 | iip->ili_fields &= ~XFS_ILOG_DDATA; | |
222 | } | |
223 | break; | |
224 | case XFS_DINODE_FMT_DEV: | |
225 | iip->ili_fields &= | |
226 | ~(XFS_ILOG_DDATA | XFS_ILOG_DBROOT | | |
227 | XFS_ILOG_DEXT | XFS_ILOG_UUID); | |
228 | if (iip->ili_fields & XFS_ILOG_DEV) | |
229 | ilf->ilf_u.ilfu_rdev = ip->i_df.if_u2.if_rdev; | |
230 | break; | |
231 | case XFS_DINODE_FMT_UUID: | |
232 | iip->ili_fields &= | |
233 | ~(XFS_ILOG_DDATA | XFS_ILOG_DBROOT | | |
234 | XFS_ILOG_DEXT | XFS_ILOG_DEV); | |
235 | if (iip->ili_fields & XFS_ILOG_UUID) | |
236 | ilf->ilf_u.ilfu_uuid = ip->i_df.if_u2.if_uuid; | |
237 | break; | |
238 | default: | |
239 | ASSERT(0); | |
240 | break; | |
241 | } | |
242 | } | |
243 | ||
244 | STATIC void | |
245 | xfs_inode_item_format_attr_fork( | |
246 | struct xfs_inode_log_item *iip, | |
247 | struct xfs_inode_log_format *ilf, | |
248 | struct xfs_log_vec *lv, | |
249 | struct xfs_log_iovec **vecp) | |
250 | { | |
251 | struct xfs_inode *ip = iip->ili_inode; | |
252 | size_t data_bytes; | |
253 | ||
254 | switch (ip->i_d.di_aformat) { | |
255 | case XFS_DINODE_FMT_EXTENTS: | |
256 | iip->ili_fields &= | |
257 | ~(XFS_ILOG_ADATA | XFS_ILOG_ABROOT); | |
258 | ||
259 | if ((iip->ili_fields & XFS_ILOG_AEXT) && | |
260 | ip->i_d.di_anextents > 0 && | |
261 | ip->i_afp->if_bytes > 0) { | |
262 | struct xfs_bmbt_rec *p; | |
263 | ||
264 | ASSERT(ip->i_afp->if_bytes / sizeof(xfs_bmbt_rec_t) == | |
265 | ip->i_d.di_anextents); | |
266 | ASSERT(ip->i_afp->if_u1.if_extents != NULL); | |
267 | ||
268 | p = xlog_prepare_iovec(lv, vecp, XLOG_REG_TYPE_IATTR_EXT); | |
269 | data_bytes = xfs_iextents_copy(ip, p, XFS_ATTR_FORK); | |
270 | xlog_finish_iovec(lv, *vecp, data_bytes); | |
271 | ||
272 | ilf->ilf_asize = data_bytes; | |
273 | ilf->ilf_size++; | |
274 | } else { | |
275 | iip->ili_fields &= ~XFS_ILOG_AEXT; | |
276 | } | |
277 | break; | |
278 | case XFS_DINODE_FMT_BTREE: | |
279 | iip->ili_fields &= | |
280 | ~(XFS_ILOG_ADATA | XFS_ILOG_AEXT); | |
281 | ||
282 | if ((iip->ili_fields & XFS_ILOG_ABROOT) && | |
283 | ip->i_afp->if_broot_bytes > 0) { | |
284 | ASSERT(ip->i_afp->if_broot != NULL); | |
285 | ||
286 | xlog_copy_iovec(lv, vecp, XLOG_REG_TYPE_IATTR_BROOT, | |
287 | ip->i_afp->if_broot, | |
288 | ip->i_afp->if_broot_bytes); | |
289 | ilf->ilf_asize = ip->i_afp->if_broot_bytes; | |
290 | ilf->ilf_size++; | |
291 | } else { | |
292 | iip->ili_fields &= ~XFS_ILOG_ABROOT; | |
293 | } | |
294 | break; | |
295 | case XFS_DINODE_FMT_LOCAL: | |
296 | iip->ili_fields &= | |
297 | ~(XFS_ILOG_AEXT | XFS_ILOG_ABROOT); | |
298 | ||
299 | if ((iip->ili_fields & XFS_ILOG_ADATA) && | |
300 | ip->i_afp->if_bytes > 0) { | |
301 | /* | |
302 | * Round i_bytes up to a word boundary. | |
303 | * The underlying memory is guaranteed to | |
304 | * to be there by xfs_idata_realloc(). | |
305 | */ | |
306 | data_bytes = roundup(ip->i_afp->if_bytes, 4); | |
307 | ASSERT(ip->i_afp->if_real_bytes == 0 || | |
308 | ip->i_afp->if_real_bytes == data_bytes); | |
309 | ASSERT(ip->i_afp->if_u1.if_data != NULL); | |
310 | xlog_copy_iovec(lv, vecp, XLOG_REG_TYPE_IATTR_LOCAL, | |
311 | ip->i_afp->if_u1.if_data, | |
312 | data_bytes); | |
313 | ilf->ilf_asize = (unsigned)data_bytes; | |
314 | ilf->ilf_size++; | |
315 | } else { | |
316 | iip->ili_fields &= ~XFS_ILOG_ADATA; | |
317 | } | |
318 | break; | |
319 | default: | |
320 | ASSERT(0); | |
321 | break; | |
322 | } | |
323 | } | |
324 | ||
325 | /* | |
326 | * This is called to fill in the vector of log iovecs for the given inode | |
327 | * log item. It fills the first item with an inode log format structure, | |
328 | * the second with the on-disk inode structure, and a possible third and/or | |
329 | * fourth with the inode data/extents/b-tree root and inode attributes | |
330 | * data/extents/b-tree root. | |
331 | */ | |
332 | STATIC void | |
333 | xfs_inode_item_format( | |
334 | struct xfs_log_item *lip, | |
335 | struct xfs_log_vec *lv) | |
336 | { | |
337 | struct xfs_inode_log_item *iip = INODE_ITEM(lip); | |
338 | struct xfs_inode *ip = iip->ili_inode; | |
339 | struct xfs_inode_log_format *ilf; | |
340 | struct xfs_log_iovec *vecp = NULL; | |
341 | ||
342 | ASSERT(ip->i_d.di_version > 1); | |
343 | ||
344 | ilf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_IFORMAT); | |
345 | ilf->ilf_type = XFS_LI_INODE; | |
346 | ilf->ilf_ino = ip->i_ino; | |
347 | ilf->ilf_blkno = ip->i_imap.im_blkno; | |
348 | ilf->ilf_len = ip->i_imap.im_len; | |
349 | ilf->ilf_boffset = ip->i_imap.im_boffset; | |
350 | ilf->ilf_fields = XFS_ILOG_CORE; | |
351 | ilf->ilf_size = 2; /* format + core */ | |
352 | xlog_finish_iovec(lv, vecp, sizeof(struct xfs_inode_log_format)); | |
353 | ||
354 | xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ICORE, | |
355 | &ip->i_d, | |
356 | xfs_icdinode_size(ip->i_d.di_version)); | |
357 | ||
358 | xfs_inode_item_format_data_fork(iip, ilf, lv, &vecp); | |
359 | if (XFS_IFORK_Q(ip)) { | |
360 | xfs_inode_item_format_attr_fork(iip, ilf, lv, &vecp); | |
361 | } else { | |
362 | iip->ili_fields &= | |
363 | ~(XFS_ILOG_ADATA | XFS_ILOG_ABROOT | XFS_ILOG_AEXT); | |
364 | } | |
365 | ||
366 | /* update the format with the exact fields we actually logged */ | |
367 | ilf->ilf_fields |= (iip->ili_fields & ~XFS_ILOG_TIMESTAMP); | |
368 | } | |
369 | ||
370 | /* | |
371 | * This is called to pin the inode associated with the inode log | |
372 | * item in memory so it cannot be written out. | |
373 | */ | |
374 | STATIC void | |
375 | xfs_inode_item_pin( | |
376 | struct xfs_log_item *lip) | |
377 | { | |
378 | struct xfs_inode *ip = INODE_ITEM(lip)->ili_inode; | |
379 | ||
380 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); | |
381 | ||
382 | trace_xfs_inode_pin(ip, _RET_IP_); | |
383 | atomic_inc(&ip->i_pincount); | |
384 | } | |
385 | ||
386 | ||
387 | /* | |
388 | * This is called to unpin the inode associated with the inode log | |
389 | * item which was previously pinned with a call to xfs_inode_item_pin(). | |
390 | * | |
391 | * Also wake up anyone in xfs_iunpin_wait() if the count goes to 0. | |
392 | */ | |
393 | STATIC void | |
394 | xfs_inode_item_unpin( | |
395 | struct xfs_log_item *lip, | |
396 | int remove) | |
397 | { | |
398 | struct xfs_inode *ip = INODE_ITEM(lip)->ili_inode; | |
399 | ||
400 | trace_xfs_inode_unpin(ip, _RET_IP_); | |
401 | ASSERT(atomic_read(&ip->i_pincount) > 0); | |
402 | if (atomic_dec_and_test(&ip->i_pincount)) | |
403 | wake_up_bit(&ip->i_flags, __XFS_IPINNED_BIT); | |
404 | } | |
405 | ||
406 | STATIC uint | |
407 | xfs_inode_item_push( | |
408 | struct xfs_log_item *lip, | |
409 | struct list_head *buffer_list) | |
410 | { | |
411 | struct xfs_inode_log_item *iip = INODE_ITEM(lip); | |
412 | struct xfs_inode *ip = iip->ili_inode; | |
413 | struct xfs_buf *bp = NULL; | |
414 | uint rval = XFS_ITEM_SUCCESS; | |
415 | int error; | |
416 | ||
417 | if (xfs_ipincount(ip) > 0) | |
418 | return XFS_ITEM_PINNED; | |
419 | ||
420 | if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED)) | |
421 | return XFS_ITEM_LOCKED; | |
422 | ||
423 | /* | |
424 | * Re-check the pincount now that we stabilized the value by | |
425 | * taking the ilock. | |
426 | */ | |
427 | if (xfs_ipincount(ip) > 0) { | |
428 | rval = XFS_ITEM_PINNED; | |
429 | goto out_unlock; | |
430 | } | |
431 | ||
432 | /* | |
433 | * Stale inode items should force out the iclog. | |
434 | */ | |
435 | if (ip->i_flags & XFS_ISTALE) { | |
436 | rval = XFS_ITEM_PINNED; | |
437 | goto out_unlock; | |
438 | } | |
439 | ||
440 | /* | |
441 | * Someone else is already flushing the inode. Nothing we can do | |
442 | * here but wait for the flush to finish and remove the item from | |
443 | * the AIL. | |
444 | */ | |
445 | if (!xfs_iflock_nowait(ip)) { | |
446 | rval = XFS_ITEM_FLUSHING; | |
447 | goto out_unlock; | |
448 | } | |
449 | ||
450 | ASSERT(iip->ili_fields != 0 || XFS_FORCED_SHUTDOWN(ip->i_mount)); | |
451 | ASSERT(iip->ili_logged == 0 || XFS_FORCED_SHUTDOWN(ip->i_mount)); | |
452 | ||
453 | spin_unlock(&lip->li_ailp->xa_lock); | |
454 | ||
455 | error = xfs_iflush(ip, &bp); | |
456 | if (!error) { | |
457 | if (!xfs_buf_delwri_queue(bp, buffer_list)) | |
458 | rval = XFS_ITEM_FLUSHING; | |
459 | xfs_buf_relse(bp); | |
460 | } | |
461 | ||
462 | spin_lock(&lip->li_ailp->xa_lock); | |
463 | out_unlock: | |
464 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
465 | return rval; | |
466 | } | |
467 | ||
468 | /* | |
469 | * Unlock the inode associated with the inode log item. | |
470 | * Clear the fields of the inode and inode log item that | |
471 | * are specific to the current transaction. If the | |
472 | * hold flags is set, do not unlock the inode. | |
473 | */ | |
474 | STATIC void | |
475 | xfs_inode_item_unlock( | |
476 | struct xfs_log_item *lip) | |
477 | { | |
478 | struct xfs_inode_log_item *iip = INODE_ITEM(lip); | |
479 | struct xfs_inode *ip = iip->ili_inode; | |
480 | unsigned short lock_flags; | |
481 | ||
482 | ASSERT(ip->i_itemp != NULL); | |
483 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); | |
484 | ||
485 | lock_flags = iip->ili_lock_flags; | |
486 | iip->ili_lock_flags = 0; | |
487 | if (lock_flags) | |
488 | xfs_iunlock(ip, lock_flags); | |
489 | } | |
490 | ||
491 | /* | |
492 | * This is called to find out where the oldest active copy of the inode log | |
493 | * item in the on disk log resides now that the last log write of it completed | |
494 | * at the given lsn. Since we always re-log all dirty data in an inode, the | |
495 | * latest copy in the on disk log is the only one that matters. Therefore, | |
496 | * simply return the given lsn. | |
497 | * | |
498 | * If the inode has been marked stale because the cluster is being freed, we | |
499 | * don't want to (re-)insert this inode into the AIL. There is a race condition | |
500 | * where the cluster buffer may be unpinned before the inode is inserted into | |
501 | * the AIL during transaction committed processing. If the buffer is unpinned | |
502 | * before the inode item has been committed and inserted, then it is possible | |
503 | * for the buffer to be written and IO completes before the inode is inserted | |
504 | * into the AIL. In that case, we'd be inserting a clean, stale inode into the | |
505 | * AIL which will never get removed. It will, however, get reclaimed which | |
506 | * triggers an assert in xfs_inode_free() complaining about freein an inode | |
507 | * still in the AIL. | |
508 | * | |
509 | * To avoid this, just unpin the inode directly and return a LSN of -1 so the | |
510 | * transaction committed code knows that it does not need to do any further | |
511 | * processing on the item. | |
512 | */ | |
513 | STATIC xfs_lsn_t | |
514 | xfs_inode_item_committed( | |
515 | struct xfs_log_item *lip, | |
516 | xfs_lsn_t lsn) | |
517 | { | |
518 | struct xfs_inode_log_item *iip = INODE_ITEM(lip); | |
519 | struct xfs_inode *ip = iip->ili_inode; | |
520 | ||
521 | if (xfs_iflags_test(ip, XFS_ISTALE)) { | |
522 | xfs_inode_item_unpin(lip, 0); | |
523 | return -1; | |
524 | } | |
525 | return lsn; | |
526 | } | |
527 | ||
528 | /* | |
529 | * XXX rcc - this one really has to do something. Probably needs | |
530 | * to stamp in a new field in the incore inode. | |
531 | */ | |
532 | STATIC void | |
533 | xfs_inode_item_committing( | |
534 | struct xfs_log_item *lip, | |
535 | xfs_lsn_t lsn) | |
536 | { | |
537 | INODE_ITEM(lip)->ili_last_lsn = lsn; | |
538 | } | |
539 | ||
540 | /* | |
541 | * This is the ops vector shared by all buf log items. | |
542 | */ | |
543 | static const struct xfs_item_ops xfs_inode_item_ops = { | |
544 | .iop_size = xfs_inode_item_size, | |
545 | .iop_format = xfs_inode_item_format, | |
546 | .iop_pin = xfs_inode_item_pin, | |
547 | .iop_unpin = xfs_inode_item_unpin, | |
548 | .iop_unlock = xfs_inode_item_unlock, | |
549 | .iop_committed = xfs_inode_item_committed, | |
550 | .iop_push = xfs_inode_item_push, | |
551 | .iop_committing = xfs_inode_item_committing | |
552 | }; | |
553 | ||
554 | ||
555 | /* | |
556 | * Initialize the inode log item for a newly allocated (in-core) inode. | |
557 | */ | |
558 | void | |
559 | xfs_inode_item_init( | |
560 | struct xfs_inode *ip, | |
561 | struct xfs_mount *mp) | |
562 | { | |
563 | struct xfs_inode_log_item *iip; | |
564 | ||
565 | ASSERT(ip->i_itemp == NULL); | |
566 | iip = ip->i_itemp = kmem_zone_zalloc(xfs_ili_zone, KM_SLEEP); | |
567 | ||
568 | iip->ili_inode = ip; | |
569 | xfs_log_item_init(mp, &iip->ili_item, XFS_LI_INODE, | |
570 | &xfs_inode_item_ops); | |
571 | } | |
572 | ||
573 | /* | |
574 | * Free the inode log item and any memory hanging off of it. | |
575 | */ | |
576 | void | |
577 | xfs_inode_item_destroy( | |
578 | xfs_inode_t *ip) | |
579 | { | |
580 | kmem_zone_free(xfs_ili_zone, ip->i_itemp); | |
581 | } | |
582 | ||
583 | ||
584 | /* | |
585 | * This is the inode flushing I/O completion routine. It is called | |
586 | * from interrupt level when the buffer containing the inode is | |
587 | * flushed to disk. It is responsible for removing the inode item | |
588 | * from the AIL if it has not been re-logged, and unlocking the inode's | |
589 | * flush lock. | |
590 | * | |
591 | * To reduce AIL lock traffic as much as possible, we scan the buffer log item | |
592 | * list for other inodes that will run this function. We remove them from the | |
593 | * buffer list so we can process all the inode IO completions in one AIL lock | |
594 | * traversal. | |
595 | */ | |
596 | void | |
597 | xfs_iflush_done( | |
598 | struct xfs_buf *bp, | |
599 | struct xfs_log_item *lip) | |
600 | { | |
601 | struct xfs_inode_log_item *iip; | |
602 | struct xfs_log_item *blip; | |
603 | struct xfs_log_item *next; | |
604 | struct xfs_log_item *prev; | |
605 | struct xfs_ail *ailp = lip->li_ailp; | |
606 | int need_ail = 0; | |
607 | ||
608 | /* | |
609 | * Scan the buffer IO completions for other inodes being completed and | |
610 | * attach them to the current inode log item. | |
611 | */ | |
612 | blip = bp->b_fspriv; | |
613 | prev = NULL; | |
614 | while (blip != NULL) { | |
615 | if (blip->li_cb != xfs_iflush_done) { | |
616 | prev = blip; | |
617 | blip = blip->li_bio_list; | |
618 | continue; | |
619 | } | |
620 | ||
621 | /* remove from list */ | |
622 | next = blip->li_bio_list; | |
623 | if (!prev) { | |
624 | bp->b_fspriv = next; | |
625 | } else { | |
626 | prev->li_bio_list = next; | |
627 | } | |
628 | ||
629 | /* add to current list */ | |
630 | blip->li_bio_list = lip->li_bio_list; | |
631 | lip->li_bio_list = blip; | |
632 | ||
633 | /* | |
634 | * while we have the item, do the unlocked check for needing | |
635 | * the AIL lock. | |
636 | */ | |
637 | iip = INODE_ITEM(blip); | |
638 | if (iip->ili_logged && blip->li_lsn == iip->ili_flush_lsn) | |
639 | need_ail++; | |
640 | ||
641 | blip = next; | |
642 | } | |
643 | ||
644 | /* make sure we capture the state of the initial inode. */ | |
645 | iip = INODE_ITEM(lip); | |
646 | if (iip->ili_logged && lip->li_lsn == iip->ili_flush_lsn) | |
647 | need_ail++; | |
648 | ||
649 | /* | |
650 | * We only want to pull the item from the AIL if it is | |
651 | * actually there and its location in the log has not | |
652 | * changed since we started the flush. Thus, we only bother | |
653 | * if the ili_logged flag is set and the inode's lsn has not | |
654 | * changed. First we check the lsn outside | |
655 | * the lock since it's cheaper, and then we recheck while | |
656 | * holding the lock before removing the inode from the AIL. | |
657 | */ | |
658 | if (need_ail) { | |
659 | struct xfs_log_item *log_items[need_ail]; | |
660 | int i = 0; | |
661 | spin_lock(&ailp->xa_lock); | |
662 | for (blip = lip; blip; blip = blip->li_bio_list) { | |
663 | iip = INODE_ITEM(blip); | |
664 | if (iip->ili_logged && | |
665 | blip->li_lsn == iip->ili_flush_lsn) { | |
666 | log_items[i++] = blip; | |
667 | } | |
668 | ASSERT(i <= need_ail); | |
669 | } | |
670 | /* xfs_trans_ail_delete_bulk() drops the AIL lock. */ | |
671 | xfs_trans_ail_delete_bulk(ailp, log_items, i, | |
672 | SHUTDOWN_CORRUPT_INCORE); | |
673 | } | |
674 | ||
675 | ||
676 | /* | |
677 | * clean up and unlock the flush lock now we are done. We can clear the | |
678 | * ili_last_fields bits now that we know that the data corresponding to | |
679 | * them is safely on disk. | |
680 | */ | |
681 | for (blip = lip; blip; blip = next) { | |
682 | next = blip->li_bio_list; | |
683 | blip->li_bio_list = NULL; | |
684 | ||
685 | iip = INODE_ITEM(blip); | |
686 | iip->ili_logged = 0; | |
687 | iip->ili_last_fields = 0; | |
688 | xfs_ifunlock(iip->ili_inode); | |
689 | } | |
690 | } | |
691 | ||
692 | /* | |
693 | * This is the inode flushing abort routine. It is called from xfs_iflush when | |
694 | * the filesystem is shutting down to clean up the inode state. It is | |
695 | * responsible for removing the inode item from the AIL if it has not been | |
696 | * re-logged, and unlocking the inode's flush lock. | |
697 | */ | |
698 | void | |
699 | xfs_iflush_abort( | |
700 | xfs_inode_t *ip, | |
701 | bool stale) | |
702 | { | |
703 | xfs_inode_log_item_t *iip = ip->i_itemp; | |
704 | ||
705 | if (iip) { | |
706 | if (iip->ili_item.li_flags & XFS_LI_IN_AIL) { | |
707 | xfs_trans_ail_remove(&iip->ili_item, | |
708 | stale ? SHUTDOWN_LOG_IO_ERROR : | |
709 | SHUTDOWN_CORRUPT_INCORE); | |
710 | } | |
711 | iip->ili_logged = 0; | |
712 | /* | |
713 | * Clear the ili_last_fields bits now that we know that the | |
714 | * data corresponding to them is safely on disk. | |
715 | */ | |
716 | iip->ili_last_fields = 0; | |
717 | /* | |
718 | * Clear the inode logging fields so no more flushes are | |
719 | * attempted. | |
720 | */ | |
721 | iip->ili_fields = 0; | |
722 | iip->ili_fsync_fields = 0; | |
723 | } | |
724 | /* | |
725 | * Release the inode's flush lock since we're done with it. | |
726 | */ | |
727 | xfs_ifunlock(ip); | |
728 | } | |
729 | ||
730 | void | |
731 | xfs_istale_done( | |
732 | struct xfs_buf *bp, | |
733 | struct xfs_log_item *lip) | |
734 | { | |
735 | xfs_iflush_abort(INODE_ITEM(lip)->ili_inode, true); | |
736 | } | |
737 | ||
738 | /* | |
739 | * convert an xfs_inode_log_format struct from either 32 or 64 bit versions | |
740 | * (which can have different field alignments) to the native version | |
741 | */ | |
742 | int | |
743 | xfs_inode_item_format_convert( | |
744 | xfs_log_iovec_t *buf, | |
745 | xfs_inode_log_format_t *in_f) | |
746 | { | |
747 | if (buf->i_len == sizeof(xfs_inode_log_format_32_t)) { | |
748 | xfs_inode_log_format_32_t *in_f32 = buf->i_addr; | |
749 | ||
750 | in_f->ilf_type = in_f32->ilf_type; | |
751 | in_f->ilf_size = in_f32->ilf_size; | |
752 | in_f->ilf_fields = in_f32->ilf_fields; | |
753 | in_f->ilf_asize = in_f32->ilf_asize; | |
754 | in_f->ilf_dsize = in_f32->ilf_dsize; | |
755 | in_f->ilf_ino = in_f32->ilf_ino; | |
756 | /* copy biggest field of ilf_u */ | |
757 | memcpy(in_f->ilf_u.ilfu_uuid.__u_bits, | |
758 | in_f32->ilf_u.ilfu_uuid.__u_bits, | |
759 | sizeof(uuid_t)); | |
760 | in_f->ilf_blkno = in_f32->ilf_blkno; | |
761 | in_f->ilf_len = in_f32->ilf_len; | |
762 | in_f->ilf_boffset = in_f32->ilf_boffset; | |
763 | return 0; | |
764 | } else if (buf->i_len == sizeof(xfs_inode_log_format_64_t)){ | |
765 | xfs_inode_log_format_64_t *in_f64 = buf->i_addr; | |
766 | ||
767 | in_f->ilf_type = in_f64->ilf_type; | |
768 | in_f->ilf_size = in_f64->ilf_size; | |
769 | in_f->ilf_fields = in_f64->ilf_fields; | |
770 | in_f->ilf_asize = in_f64->ilf_asize; | |
771 | in_f->ilf_dsize = in_f64->ilf_dsize; | |
772 | in_f->ilf_ino = in_f64->ilf_ino; | |
773 | /* copy biggest field of ilf_u */ | |
774 | memcpy(in_f->ilf_u.ilfu_uuid.__u_bits, | |
775 | in_f64->ilf_u.ilfu_uuid.__u_bits, | |
776 | sizeof(uuid_t)); | |
777 | in_f->ilf_blkno = in_f64->ilf_blkno; | |
778 | in_f->ilf_len = in_f64->ilf_len; | |
779 | in_f->ilf_boffset = in_f64->ilf_boffset; | |
780 | return 0; | |
781 | } | |
782 | return -EFSCORRUPTED; | |
783 | } |