Commit | Line | Data |
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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc. |
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" |
1da177e4 | 21 | #include "xfs_log.h" |
a844f451 | 22 | #include "xfs_inum.h" |
1da177e4 LT |
23 | #include "xfs_trans.h" |
24 | #include "xfs_buf_item.h" | |
25 | #include "xfs_sb.h" | |
1da177e4 LT |
26 | #include "xfs_dmapi.h" |
27 | #include "xfs_mount.h" | |
28 | #include "xfs_trans_priv.h" | |
29 | #include "xfs_extfree_item.h" | |
30 | ||
31 | ||
32 | kmem_zone_t *xfs_efi_zone; | |
33 | kmem_zone_t *xfs_efd_zone; | |
34 | ||
35 | STATIC void xfs_efi_item_unlock(xfs_efi_log_item_t *); | |
36 | STATIC void xfs_efi_item_abort(xfs_efi_log_item_t *); | |
37 | STATIC void xfs_efd_item_abort(xfs_efd_log_item_t *); | |
38 | ||
39 | ||
7d795ca3 CH |
40 | void |
41 | xfs_efi_item_free(xfs_efi_log_item_t *efip) | |
42 | { | |
43 | int nexts = efip->efi_format.efi_nextents; | |
44 | ||
45 | if (nexts > XFS_EFI_MAX_FAST_EXTENTS) { | |
46 | kmem_free(efip, sizeof(xfs_efi_log_item_t) + | |
47 | (nexts - 1) * sizeof(xfs_extent_t)); | |
48 | } else { | |
49 | kmem_zone_free(xfs_efi_zone, efip); | |
50 | } | |
51 | } | |
1da177e4 LT |
52 | |
53 | /* | |
54 | * This returns the number of iovecs needed to log the given efi item. | |
55 | * We only need 1 iovec for an efi item. It just logs the efi_log_format | |
56 | * structure. | |
57 | */ | |
58 | /*ARGSUSED*/ | |
59 | STATIC uint | |
60 | xfs_efi_item_size(xfs_efi_log_item_t *efip) | |
61 | { | |
62 | return 1; | |
63 | } | |
64 | ||
65 | /* | |
66 | * This is called to fill in the vector of log iovecs for the | |
67 | * given efi log item. We use only 1 iovec, and we point that | |
68 | * at the efi_log_format structure embedded in the efi item. | |
69 | * It is at this point that we assert that all of the extent | |
70 | * slots in the efi item have been filled. | |
71 | */ | |
72 | STATIC void | |
73 | xfs_efi_item_format(xfs_efi_log_item_t *efip, | |
74 | xfs_log_iovec_t *log_vector) | |
75 | { | |
76 | uint size; | |
77 | ||
78 | ASSERT(efip->efi_next_extent == efip->efi_format.efi_nextents); | |
79 | ||
80 | efip->efi_format.efi_type = XFS_LI_EFI; | |
81 | ||
82 | size = sizeof(xfs_efi_log_format_t); | |
83 | size += (efip->efi_format.efi_nextents - 1) * sizeof(xfs_extent_t); | |
84 | efip->efi_format.efi_size = 1; | |
85 | ||
86 | log_vector->i_addr = (xfs_caddr_t)&(efip->efi_format); | |
87 | log_vector->i_len = size; | |
7e9c6396 | 88 | XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_EFI_FORMAT); |
1da177e4 LT |
89 | ASSERT(size >= sizeof(xfs_efi_log_format_t)); |
90 | } | |
91 | ||
92 | ||
93 | /* | |
94 | * Pinning has no meaning for an efi item, so just return. | |
95 | */ | |
96 | /*ARGSUSED*/ | |
97 | STATIC void | |
98 | xfs_efi_item_pin(xfs_efi_log_item_t *efip) | |
99 | { | |
100 | return; | |
101 | } | |
102 | ||
103 | ||
104 | /* | |
105 | * While EFIs cannot really be pinned, the unpin operation is the | |
106 | * last place at which the EFI is manipulated during a transaction. | |
107 | * Here we coordinate with xfs_efi_cancel() to determine who gets to | |
108 | * free the EFI. | |
109 | */ | |
110 | /*ARGSUSED*/ | |
111 | STATIC void | |
112 | xfs_efi_item_unpin(xfs_efi_log_item_t *efip, int stale) | |
113 | { | |
1da177e4 LT |
114 | xfs_mount_t *mp; |
115 | SPLDECL(s); | |
116 | ||
117 | mp = efip->efi_item.li_mountp; | |
118 | AIL_LOCK(mp, s); | |
119 | if (efip->efi_flags & XFS_EFI_CANCELED) { | |
120 | /* | |
121 | * xfs_trans_delete_ail() drops the AIL lock. | |
122 | */ | |
123 | xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s); | |
7d795ca3 | 124 | xfs_efi_item_free(efip); |
1da177e4 LT |
125 | } else { |
126 | efip->efi_flags |= XFS_EFI_COMMITTED; | |
127 | AIL_UNLOCK(mp, s); | |
128 | } | |
1da177e4 LT |
129 | } |
130 | ||
131 | /* | |
132 | * like unpin only we have to also clear the xaction descriptor | |
133 | * pointing the log item if we free the item. This routine duplicates | |
134 | * unpin because efi_flags is protected by the AIL lock. Freeing | |
135 | * the descriptor and then calling unpin would force us to drop the AIL | |
136 | * lock which would open up a race condition. | |
137 | */ | |
138 | STATIC void | |
139 | xfs_efi_item_unpin_remove(xfs_efi_log_item_t *efip, xfs_trans_t *tp) | |
140 | { | |
1da177e4 LT |
141 | xfs_mount_t *mp; |
142 | xfs_log_item_desc_t *lidp; | |
143 | SPLDECL(s); | |
144 | ||
145 | mp = efip->efi_item.li_mountp; | |
146 | AIL_LOCK(mp, s); | |
147 | if (efip->efi_flags & XFS_EFI_CANCELED) { | |
148 | /* | |
149 | * free the xaction descriptor pointing to this item | |
150 | */ | |
151 | lidp = xfs_trans_find_item(tp, (xfs_log_item_t *) efip); | |
152 | xfs_trans_free_item(tp, lidp); | |
153 | /* | |
154 | * pull the item off the AIL. | |
155 | * xfs_trans_delete_ail() drops the AIL lock. | |
156 | */ | |
157 | xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s); | |
7d795ca3 | 158 | xfs_efi_item_free(efip); |
1da177e4 LT |
159 | } else { |
160 | efip->efi_flags |= XFS_EFI_COMMITTED; | |
161 | AIL_UNLOCK(mp, s); | |
162 | } | |
1da177e4 LT |
163 | } |
164 | ||
165 | /* | |
166 | * Efi items have no locking or pushing. However, since EFIs are | |
167 | * pulled from the AIL when their corresponding EFDs are committed | |
168 | * to disk, their situation is very similar to being pinned. Return | |
169 | * XFS_ITEM_PINNED so that the caller will eventually flush the log. | |
170 | * This should help in getting the EFI out of the AIL. | |
171 | */ | |
172 | /*ARGSUSED*/ | |
173 | STATIC uint | |
174 | xfs_efi_item_trylock(xfs_efi_log_item_t *efip) | |
175 | { | |
176 | return XFS_ITEM_PINNED; | |
177 | } | |
178 | ||
179 | /* | |
180 | * Efi items have no locking, so just return. | |
181 | */ | |
182 | /*ARGSUSED*/ | |
183 | STATIC void | |
184 | xfs_efi_item_unlock(xfs_efi_log_item_t *efip) | |
185 | { | |
186 | if (efip->efi_item.li_flags & XFS_LI_ABORTED) | |
187 | xfs_efi_item_abort(efip); | |
188 | return; | |
189 | } | |
190 | ||
191 | /* | |
192 | * The EFI is logged only once and cannot be moved in the log, so | |
193 | * simply return the lsn at which it's been logged. The canceled | |
194 | * flag is not paid any attention here. Checking for that is delayed | |
195 | * until the EFI is unpinned. | |
196 | */ | |
197 | /*ARGSUSED*/ | |
198 | STATIC xfs_lsn_t | |
199 | xfs_efi_item_committed(xfs_efi_log_item_t *efip, xfs_lsn_t lsn) | |
200 | { | |
201 | return lsn; | |
202 | } | |
203 | ||
204 | /* | |
205 | * This is called when the transaction logging the EFI is aborted. | |
206 | * Free up the EFI and return. No need to clean up the slot for | |
207 | * the item in the transaction. That was done by the unpin code | |
208 | * which is called prior to this routine in the abort/fs-shutdown path. | |
209 | */ | |
210 | STATIC void | |
211 | xfs_efi_item_abort(xfs_efi_log_item_t *efip) | |
212 | { | |
7d795ca3 | 213 | xfs_efi_item_free(efip); |
1da177e4 LT |
214 | } |
215 | ||
216 | /* | |
217 | * There isn't much you can do to push on an efi item. It is simply | |
218 | * stuck waiting for all of its corresponding efd items to be | |
219 | * committed to disk. | |
220 | */ | |
221 | /*ARGSUSED*/ | |
222 | STATIC void | |
223 | xfs_efi_item_push(xfs_efi_log_item_t *efip) | |
224 | { | |
225 | return; | |
226 | } | |
227 | ||
228 | /* | |
229 | * The EFI dependency tracking op doesn't do squat. It can't because | |
230 | * it doesn't know where the free extent is coming from. The dependency | |
231 | * tracking has to be handled by the "enclosing" metadata object. For | |
232 | * example, for inodes, the inode is locked throughout the extent freeing | |
233 | * so the dependency should be recorded there. | |
234 | */ | |
235 | /*ARGSUSED*/ | |
236 | STATIC void | |
237 | xfs_efi_item_committing(xfs_efi_log_item_t *efip, xfs_lsn_t lsn) | |
238 | { | |
239 | return; | |
240 | } | |
241 | ||
242 | /* | |
243 | * This is the ops vector shared by all efi log items. | |
244 | */ | |
ba0f32d4 | 245 | STATIC struct xfs_item_ops xfs_efi_item_ops = { |
1da177e4 LT |
246 | .iop_size = (uint(*)(xfs_log_item_t*))xfs_efi_item_size, |
247 | .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*)) | |
248 | xfs_efi_item_format, | |
249 | .iop_pin = (void(*)(xfs_log_item_t*))xfs_efi_item_pin, | |
250 | .iop_unpin = (void(*)(xfs_log_item_t*, int))xfs_efi_item_unpin, | |
251 | .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t *)) | |
252 | xfs_efi_item_unpin_remove, | |
253 | .iop_trylock = (uint(*)(xfs_log_item_t*))xfs_efi_item_trylock, | |
254 | .iop_unlock = (void(*)(xfs_log_item_t*))xfs_efi_item_unlock, | |
255 | .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t)) | |
256 | xfs_efi_item_committed, | |
257 | .iop_push = (void(*)(xfs_log_item_t*))xfs_efi_item_push, | |
258 | .iop_abort = (void(*)(xfs_log_item_t*))xfs_efi_item_abort, | |
259 | .iop_pushbuf = NULL, | |
260 | .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) | |
261 | xfs_efi_item_committing | |
262 | }; | |
263 | ||
264 | ||
265 | /* | |
266 | * Allocate and initialize an efi item with the given number of extents. | |
267 | */ | |
268 | xfs_efi_log_item_t * | |
269 | xfs_efi_init(xfs_mount_t *mp, | |
270 | uint nextents) | |
271 | ||
272 | { | |
273 | xfs_efi_log_item_t *efip; | |
274 | uint size; | |
275 | ||
276 | ASSERT(nextents > 0); | |
277 | if (nextents > XFS_EFI_MAX_FAST_EXTENTS) { | |
278 | size = (uint)(sizeof(xfs_efi_log_item_t) + | |
279 | ((nextents - 1) * sizeof(xfs_extent_t))); | |
280 | efip = (xfs_efi_log_item_t*)kmem_zalloc(size, KM_SLEEP); | |
281 | } else { | |
282 | efip = (xfs_efi_log_item_t*)kmem_zone_zalloc(xfs_efi_zone, | |
283 | KM_SLEEP); | |
284 | } | |
285 | ||
286 | efip->efi_item.li_type = XFS_LI_EFI; | |
287 | efip->efi_item.li_ops = &xfs_efi_item_ops; | |
288 | efip->efi_item.li_mountp = mp; | |
289 | efip->efi_format.efi_nextents = nextents; | |
290 | efip->efi_format.efi_id = (__psint_t)(void*)efip; | |
291 | ||
292 | return (efip); | |
293 | } | |
294 | ||
6d192a9b TS |
295 | /* |
296 | * Copy an EFI format buffer from the given buf, and into the destination | |
297 | * EFI format structure. | |
298 | * The given buffer can be in 32 bit or 64 bit form (which has different padding), | |
299 | * one of which will be the native format for this kernel. | |
300 | * It will handle the conversion of formats if necessary. | |
301 | */ | |
302 | int | |
303 | xfs_efi_copy_format(xfs_log_iovec_t *buf, xfs_efi_log_format_t *dst_efi_fmt) | |
304 | { | |
305 | xfs_efi_log_format_t *src_efi_fmt = (xfs_efi_log_format_t *)buf->i_addr; | |
306 | uint i; | |
307 | uint len = sizeof(xfs_efi_log_format_t) + | |
308 | (src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_t); | |
309 | uint len32 = sizeof(xfs_efi_log_format_32_t) + | |
310 | (src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_32_t); | |
311 | uint len64 = sizeof(xfs_efi_log_format_64_t) + | |
312 | (src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_64_t); | |
313 | ||
314 | if (buf->i_len == len) { | |
315 | memcpy((char *)dst_efi_fmt, (char*)src_efi_fmt, len); | |
316 | return 0; | |
317 | } else if (buf->i_len == len32) { | |
318 | xfs_efi_log_format_32_t *src_efi_fmt_32 = | |
319 | (xfs_efi_log_format_32_t *)buf->i_addr; | |
320 | ||
321 | dst_efi_fmt->efi_type = src_efi_fmt_32->efi_type; | |
322 | dst_efi_fmt->efi_size = src_efi_fmt_32->efi_size; | |
323 | dst_efi_fmt->efi_nextents = src_efi_fmt_32->efi_nextents; | |
324 | dst_efi_fmt->efi_id = src_efi_fmt_32->efi_id; | |
325 | for (i = 0; i < dst_efi_fmt->efi_nextents; i++) { | |
326 | dst_efi_fmt->efi_extents[i].ext_start = | |
327 | src_efi_fmt_32->efi_extents[i].ext_start; | |
328 | dst_efi_fmt->efi_extents[i].ext_len = | |
329 | src_efi_fmt_32->efi_extents[i].ext_len; | |
330 | } | |
331 | return 0; | |
332 | } else if (buf->i_len == len64) { | |
333 | xfs_efi_log_format_64_t *src_efi_fmt_64 = | |
334 | (xfs_efi_log_format_64_t *)buf->i_addr; | |
335 | ||
336 | dst_efi_fmt->efi_type = src_efi_fmt_64->efi_type; | |
337 | dst_efi_fmt->efi_size = src_efi_fmt_64->efi_size; | |
338 | dst_efi_fmt->efi_nextents = src_efi_fmt_64->efi_nextents; | |
339 | dst_efi_fmt->efi_id = src_efi_fmt_64->efi_id; | |
340 | for (i = 0; i < dst_efi_fmt->efi_nextents; i++) { | |
341 | dst_efi_fmt->efi_extents[i].ext_start = | |
342 | src_efi_fmt_64->efi_extents[i].ext_start; | |
343 | dst_efi_fmt->efi_extents[i].ext_len = | |
344 | src_efi_fmt_64->efi_extents[i].ext_len; | |
345 | } | |
346 | return 0; | |
347 | } | |
348 | return EFSCORRUPTED; | |
349 | } | |
350 | ||
1da177e4 LT |
351 | /* |
352 | * This is called by the efd item code below to release references to | |
353 | * the given efi item. Each efd calls this with the number of | |
354 | * extents that it has logged, and when the sum of these reaches | |
355 | * the total number of extents logged by this efi item we can free | |
356 | * the efi item. | |
357 | * | |
358 | * Freeing the efi item requires that we remove it from the AIL. | |
359 | * We'll use the AIL lock to protect our counters as well as | |
360 | * the removal from the AIL. | |
361 | */ | |
362 | void | |
363 | xfs_efi_release(xfs_efi_log_item_t *efip, | |
364 | uint nextents) | |
365 | { | |
366 | xfs_mount_t *mp; | |
367 | int extents_left; | |
1da177e4 LT |
368 | SPLDECL(s); |
369 | ||
370 | mp = efip->efi_item.li_mountp; | |
371 | ASSERT(efip->efi_next_extent > 0); | |
372 | ASSERT(efip->efi_flags & XFS_EFI_COMMITTED); | |
373 | ||
374 | AIL_LOCK(mp, s); | |
375 | ASSERT(efip->efi_next_extent >= nextents); | |
376 | efip->efi_next_extent -= nextents; | |
377 | extents_left = efip->efi_next_extent; | |
378 | if (extents_left == 0) { | |
379 | /* | |
380 | * xfs_trans_delete_ail() drops the AIL lock. | |
381 | */ | |
382 | xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s); | |
7d795ca3 | 383 | xfs_efi_item_free(efip); |
1da177e4 LT |
384 | } else { |
385 | AIL_UNLOCK(mp, s); | |
386 | } | |
1da177e4 LT |
387 | } |
388 | ||
389 | /* | |
390 | * This is called when the transaction that should be committing the | |
391 | * EFD corresponding to the given EFI is aborted. The committed and | |
392 | * canceled flags are used to coordinate the freeing of the EFI and | |
393 | * the references by the transaction that committed it. | |
394 | */ | |
395 | STATIC void | |
396 | xfs_efi_cancel( | |
397 | xfs_efi_log_item_t *efip) | |
398 | { | |
1da177e4 LT |
399 | xfs_mount_t *mp; |
400 | SPLDECL(s); | |
401 | ||
402 | mp = efip->efi_item.li_mountp; | |
403 | AIL_LOCK(mp, s); | |
404 | if (efip->efi_flags & XFS_EFI_COMMITTED) { | |
405 | /* | |
406 | * xfs_trans_delete_ail() drops the AIL lock. | |
407 | */ | |
408 | xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s); | |
7d795ca3 | 409 | xfs_efi_item_free(efip); |
1da177e4 LT |
410 | } else { |
411 | efip->efi_flags |= XFS_EFI_CANCELED; | |
412 | AIL_UNLOCK(mp, s); | |
413 | } | |
1da177e4 LT |
414 | } |
415 | ||
7d795ca3 CH |
416 | STATIC void |
417 | xfs_efd_item_free(xfs_efd_log_item_t *efdp) | |
418 | { | |
419 | int nexts = efdp->efd_format.efd_nextents; | |
1da177e4 | 420 | |
7d795ca3 CH |
421 | if (nexts > XFS_EFD_MAX_FAST_EXTENTS) { |
422 | kmem_free(efdp, sizeof(xfs_efd_log_item_t) + | |
423 | (nexts - 1) * sizeof(xfs_extent_t)); | |
424 | } else { | |
425 | kmem_zone_free(xfs_efd_zone, efdp); | |
426 | } | |
427 | } | |
1da177e4 LT |
428 | |
429 | /* | |
430 | * This returns the number of iovecs needed to log the given efd item. | |
431 | * We only need 1 iovec for an efd item. It just logs the efd_log_format | |
432 | * structure. | |
433 | */ | |
434 | /*ARGSUSED*/ | |
435 | STATIC uint | |
436 | xfs_efd_item_size(xfs_efd_log_item_t *efdp) | |
437 | { | |
438 | return 1; | |
439 | } | |
440 | ||
441 | /* | |
442 | * This is called to fill in the vector of log iovecs for the | |
443 | * given efd log item. We use only 1 iovec, and we point that | |
444 | * at the efd_log_format structure embedded in the efd item. | |
445 | * It is at this point that we assert that all of the extent | |
446 | * slots in the efd item have been filled. | |
447 | */ | |
448 | STATIC void | |
449 | xfs_efd_item_format(xfs_efd_log_item_t *efdp, | |
450 | xfs_log_iovec_t *log_vector) | |
451 | { | |
452 | uint size; | |
453 | ||
454 | ASSERT(efdp->efd_next_extent == efdp->efd_format.efd_nextents); | |
455 | ||
456 | efdp->efd_format.efd_type = XFS_LI_EFD; | |
457 | ||
458 | size = sizeof(xfs_efd_log_format_t); | |
459 | size += (efdp->efd_format.efd_nextents - 1) * sizeof(xfs_extent_t); | |
460 | efdp->efd_format.efd_size = 1; | |
461 | ||
462 | log_vector->i_addr = (xfs_caddr_t)&(efdp->efd_format); | |
463 | log_vector->i_len = size; | |
7e9c6396 | 464 | XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_EFD_FORMAT); |
1da177e4 LT |
465 | ASSERT(size >= sizeof(xfs_efd_log_format_t)); |
466 | } | |
467 | ||
468 | ||
469 | /* | |
470 | * Pinning has no meaning for an efd item, so just return. | |
471 | */ | |
472 | /*ARGSUSED*/ | |
473 | STATIC void | |
474 | xfs_efd_item_pin(xfs_efd_log_item_t *efdp) | |
475 | { | |
476 | return; | |
477 | } | |
478 | ||
479 | ||
480 | /* | |
481 | * Since pinning has no meaning for an efd item, unpinning does | |
482 | * not either. | |
483 | */ | |
484 | /*ARGSUSED*/ | |
485 | STATIC void | |
486 | xfs_efd_item_unpin(xfs_efd_log_item_t *efdp, int stale) | |
487 | { | |
488 | return; | |
489 | } | |
490 | ||
491 | /*ARGSUSED*/ | |
492 | STATIC void | |
493 | xfs_efd_item_unpin_remove(xfs_efd_log_item_t *efdp, xfs_trans_t *tp) | |
494 | { | |
495 | return; | |
496 | } | |
497 | ||
498 | /* | |
499 | * Efd items have no locking, so just return success. | |
500 | */ | |
501 | /*ARGSUSED*/ | |
502 | STATIC uint | |
503 | xfs_efd_item_trylock(xfs_efd_log_item_t *efdp) | |
504 | { | |
505 | return XFS_ITEM_LOCKED; | |
506 | } | |
507 | ||
508 | /* | |
509 | * Efd items have no locking or pushing, so return failure | |
510 | * so that the caller doesn't bother with us. | |
511 | */ | |
512 | /*ARGSUSED*/ | |
513 | STATIC void | |
514 | xfs_efd_item_unlock(xfs_efd_log_item_t *efdp) | |
515 | { | |
516 | if (efdp->efd_item.li_flags & XFS_LI_ABORTED) | |
517 | xfs_efd_item_abort(efdp); | |
518 | return; | |
519 | } | |
520 | ||
521 | /* | |
522 | * When the efd item is committed to disk, all we need to do | |
523 | * is delete our reference to our partner efi item and then | |
524 | * free ourselves. Since we're freeing ourselves we must | |
525 | * return -1 to keep the transaction code from further referencing | |
526 | * this item. | |
527 | */ | |
528 | /*ARGSUSED*/ | |
529 | STATIC xfs_lsn_t | |
530 | xfs_efd_item_committed(xfs_efd_log_item_t *efdp, xfs_lsn_t lsn) | |
531 | { | |
1da177e4 LT |
532 | /* |
533 | * If we got a log I/O error, it's always the case that the LR with the | |
534 | * EFI got unpinned and freed before the EFD got aborted. | |
535 | */ | |
536 | if ((efdp->efd_item.li_flags & XFS_LI_ABORTED) == 0) | |
537 | xfs_efi_release(efdp->efd_efip, efdp->efd_format.efd_nextents); | |
538 | ||
7d795ca3 | 539 | xfs_efd_item_free(efdp); |
1da177e4 LT |
540 | return (xfs_lsn_t)-1; |
541 | } | |
542 | ||
543 | /* | |
544 | * The transaction of which this EFD is a part has been aborted. | |
545 | * Inform its companion EFI of this fact and then clean up after | |
546 | * ourselves. No need to clean up the slot for the item in the | |
547 | * transaction. That was done by the unpin code which is called | |
548 | * prior to this routine in the abort/fs-shutdown path. | |
549 | */ | |
550 | STATIC void | |
551 | xfs_efd_item_abort(xfs_efd_log_item_t *efdp) | |
552 | { | |
1da177e4 LT |
553 | /* |
554 | * If we got a log I/O error, it's always the case that the LR with the | |
555 | * EFI got unpinned and freed before the EFD got aborted. So don't | |
556 | * reference the EFI at all in that case. | |
557 | */ | |
558 | if ((efdp->efd_item.li_flags & XFS_LI_ABORTED) == 0) | |
559 | xfs_efi_cancel(efdp->efd_efip); | |
560 | ||
7d795ca3 | 561 | xfs_efd_item_free(efdp); |
1da177e4 LT |
562 | } |
563 | ||
564 | /* | |
565 | * There isn't much you can do to push on an efd item. It is simply | |
566 | * stuck waiting for the log to be flushed to disk. | |
567 | */ | |
568 | /*ARGSUSED*/ | |
569 | STATIC void | |
570 | xfs_efd_item_push(xfs_efd_log_item_t *efdp) | |
571 | { | |
572 | return; | |
573 | } | |
574 | ||
575 | /* | |
576 | * The EFD dependency tracking op doesn't do squat. It can't because | |
577 | * it doesn't know where the free extent is coming from. The dependency | |
578 | * tracking has to be handled by the "enclosing" metadata object. For | |
579 | * example, for inodes, the inode is locked throughout the extent freeing | |
580 | * so the dependency should be recorded there. | |
581 | */ | |
582 | /*ARGSUSED*/ | |
583 | STATIC void | |
584 | xfs_efd_item_committing(xfs_efd_log_item_t *efip, xfs_lsn_t lsn) | |
585 | { | |
586 | return; | |
587 | } | |
588 | ||
589 | /* | |
590 | * This is the ops vector shared by all efd log items. | |
591 | */ | |
ba0f32d4 | 592 | STATIC struct xfs_item_ops xfs_efd_item_ops = { |
1da177e4 LT |
593 | .iop_size = (uint(*)(xfs_log_item_t*))xfs_efd_item_size, |
594 | .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*)) | |
595 | xfs_efd_item_format, | |
596 | .iop_pin = (void(*)(xfs_log_item_t*))xfs_efd_item_pin, | |
597 | .iop_unpin = (void(*)(xfs_log_item_t*, int))xfs_efd_item_unpin, | |
598 | .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*)) | |
599 | xfs_efd_item_unpin_remove, | |
600 | .iop_trylock = (uint(*)(xfs_log_item_t*))xfs_efd_item_trylock, | |
601 | .iop_unlock = (void(*)(xfs_log_item_t*))xfs_efd_item_unlock, | |
602 | .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t)) | |
603 | xfs_efd_item_committed, | |
604 | .iop_push = (void(*)(xfs_log_item_t*))xfs_efd_item_push, | |
605 | .iop_abort = (void(*)(xfs_log_item_t*))xfs_efd_item_abort, | |
606 | .iop_pushbuf = NULL, | |
607 | .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) | |
608 | xfs_efd_item_committing | |
609 | }; | |
610 | ||
611 | ||
612 | /* | |
613 | * Allocate and initialize an efd item with the given number of extents. | |
614 | */ | |
615 | xfs_efd_log_item_t * | |
616 | xfs_efd_init(xfs_mount_t *mp, | |
617 | xfs_efi_log_item_t *efip, | |
618 | uint nextents) | |
619 | ||
620 | { | |
621 | xfs_efd_log_item_t *efdp; | |
622 | uint size; | |
623 | ||
624 | ASSERT(nextents > 0); | |
625 | if (nextents > XFS_EFD_MAX_FAST_EXTENTS) { | |
626 | size = (uint)(sizeof(xfs_efd_log_item_t) + | |
627 | ((nextents - 1) * sizeof(xfs_extent_t))); | |
628 | efdp = (xfs_efd_log_item_t*)kmem_zalloc(size, KM_SLEEP); | |
629 | } else { | |
630 | efdp = (xfs_efd_log_item_t*)kmem_zone_zalloc(xfs_efd_zone, | |
631 | KM_SLEEP); | |
632 | } | |
633 | ||
634 | efdp->efd_item.li_type = XFS_LI_EFD; | |
635 | efdp->efd_item.li_ops = &xfs_efd_item_ops; | |
636 | efdp->efd_item.li_mountp = mp; | |
637 | efdp->efd_efip = efip; | |
638 | efdp->efd_format.efd_nextents = nextents; | |
639 | efdp->efd_format.efd_efi_id = efip->efi_format.efi_id; | |
640 | ||
641 | return (efdp); | |
642 | } |