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" | |
da353b0d | 26 | #include "xfs_ag.h" |
1da177e4 LT |
27 | #include "xfs_dmapi.h" |
28 | #include "xfs_mount.h" | |
29 | #include "xfs_trans_priv.h" | |
30 | #include "xfs_extfree_item.h" | |
31 | ||
32 | ||
33 | kmem_zone_t *xfs_efi_zone; | |
34 | kmem_zone_t *xfs_efd_zone; | |
35 | ||
36 | STATIC void xfs_efi_item_unlock(xfs_efi_log_item_t *); | |
1da177e4 | 37 | |
7d795ca3 CH |
38 | void |
39 | xfs_efi_item_free(xfs_efi_log_item_t *efip) | |
40 | { | |
41 | int nexts = efip->efi_format.efi_nextents; | |
42 | ||
43 | if (nexts > XFS_EFI_MAX_FAST_EXTENTS) { | |
44 | kmem_free(efip, sizeof(xfs_efi_log_item_t) + | |
45 | (nexts - 1) * sizeof(xfs_extent_t)); | |
46 | } else { | |
47 | kmem_zone_free(xfs_efi_zone, efip); | |
48 | } | |
49 | } | |
1da177e4 LT |
50 | |
51 | /* | |
52 | * This returns the number of iovecs needed to log the given efi item. | |
53 | * We only need 1 iovec for an efi item. It just logs the efi_log_format | |
54 | * structure. | |
55 | */ | |
56 | /*ARGSUSED*/ | |
57 | STATIC uint | |
58 | xfs_efi_item_size(xfs_efi_log_item_t *efip) | |
59 | { | |
60 | return 1; | |
61 | } | |
62 | ||
63 | /* | |
64 | * This is called to fill in the vector of log iovecs for the | |
65 | * given efi log item. We use only 1 iovec, and we point that | |
66 | * at the efi_log_format structure embedded in the efi item. | |
67 | * It is at this point that we assert that all of the extent | |
68 | * slots in the efi item have been filled. | |
69 | */ | |
70 | STATIC void | |
71 | xfs_efi_item_format(xfs_efi_log_item_t *efip, | |
72 | xfs_log_iovec_t *log_vector) | |
73 | { | |
74 | uint size; | |
75 | ||
76 | ASSERT(efip->efi_next_extent == efip->efi_format.efi_nextents); | |
77 | ||
78 | efip->efi_format.efi_type = XFS_LI_EFI; | |
79 | ||
80 | size = sizeof(xfs_efi_log_format_t); | |
81 | size += (efip->efi_format.efi_nextents - 1) * sizeof(xfs_extent_t); | |
82 | efip->efi_format.efi_size = 1; | |
83 | ||
84 | log_vector->i_addr = (xfs_caddr_t)&(efip->efi_format); | |
85 | log_vector->i_len = size; | |
7e9c6396 | 86 | XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_EFI_FORMAT); |
1da177e4 LT |
87 | ASSERT(size >= sizeof(xfs_efi_log_format_t)); |
88 | } | |
89 | ||
90 | ||
91 | /* | |
92 | * Pinning has no meaning for an efi item, so just return. | |
93 | */ | |
94 | /*ARGSUSED*/ | |
95 | STATIC void | |
96 | xfs_efi_item_pin(xfs_efi_log_item_t *efip) | |
97 | { | |
98 | return; | |
99 | } | |
100 | ||
101 | ||
102 | /* | |
103 | * While EFIs cannot really be pinned, the unpin operation is the | |
104 | * last place at which the EFI is manipulated during a transaction. | |
105 | * Here we coordinate with xfs_efi_cancel() to determine who gets to | |
106 | * free the EFI. | |
107 | */ | |
108 | /*ARGSUSED*/ | |
109 | STATIC void | |
110 | xfs_efi_item_unpin(xfs_efi_log_item_t *efip, int stale) | |
111 | { | |
1da177e4 | 112 | xfs_mount_t *mp; |
1da177e4 LT |
113 | |
114 | mp = efip->efi_item.li_mountp; | |
287f3dad | 115 | spin_lock(&mp->m_ail_lock); |
1da177e4 LT |
116 | if (efip->efi_flags & XFS_EFI_CANCELED) { |
117 | /* | |
118 | * xfs_trans_delete_ail() drops the AIL lock. | |
119 | */ | |
287f3dad | 120 | xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip); |
7d795ca3 | 121 | xfs_efi_item_free(efip); |
1da177e4 LT |
122 | } else { |
123 | efip->efi_flags |= XFS_EFI_COMMITTED; | |
287f3dad | 124 | spin_unlock(&mp->m_ail_lock); |
1da177e4 | 125 | } |
1da177e4 LT |
126 | } |
127 | ||
128 | /* | |
129 | * like unpin only we have to also clear the xaction descriptor | |
130 | * pointing the log item if we free the item. This routine duplicates | |
131 | * unpin because efi_flags is protected by the AIL lock. Freeing | |
132 | * the descriptor and then calling unpin would force us to drop the AIL | |
133 | * lock which would open up a race condition. | |
134 | */ | |
135 | STATIC void | |
136 | xfs_efi_item_unpin_remove(xfs_efi_log_item_t *efip, xfs_trans_t *tp) | |
137 | { | |
1da177e4 LT |
138 | xfs_mount_t *mp; |
139 | xfs_log_item_desc_t *lidp; | |
1da177e4 LT |
140 | |
141 | mp = efip->efi_item.li_mountp; | |
287f3dad | 142 | spin_lock(&mp->m_ail_lock); |
1da177e4 LT |
143 | if (efip->efi_flags & XFS_EFI_CANCELED) { |
144 | /* | |
145 | * free the xaction descriptor pointing to this item | |
146 | */ | |
147 | lidp = xfs_trans_find_item(tp, (xfs_log_item_t *) efip); | |
148 | xfs_trans_free_item(tp, lidp); | |
149 | /* | |
150 | * pull the item off the AIL. | |
151 | * xfs_trans_delete_ail() drops the AIL lock. | |
152 | */ | |
287f3dad | 153 | xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip); |
7d795ca3 | 154 | xfs_efi_item_free(efip); |
1da177e4 LT |
155 | } else { |
156 | efip->efi_flags |= XFS_EFI_COMMITTED; | |
287f3dad | 157 | spin_unlock(&mp->m_ail_lock); |
1da177e4 | 158 | } |
1da177e4 LT |
159 | } |
160 | ||
161 | /* | |
162 | * Efi items have no locking or pushing. However, since EFIs are | |
163 | * pulled from the AIL when their corresponding EFDs are committed | |
164 | * to disk, their situation is very similar to being pinned. Return | |
165 | * XFS_ITEM_PINNED so that the caller will eventually flush the log. | |
166 | * This should help in getting the EFI out of the AIL. | |
167 | */ | |
168 | /*ARGSUSED*/ | |
169 | STATIC uint | |
170 | xfs_efi_item_trylock(xfs_efi_log_item_t *efip) | |
171 | { | |
172 | return XFS_ITEM_PINNED; | |
173 | } | |
174 | ||
175 | /* | |
176 | * Efi items have no locking, so just return. | |
177 | */ | |
178 | /*ARGSUSED*/ | |
179 | STATIC void | |
180 | xfs_efi_item_unlock(xfs_efi_log_item_t *efip) | |
181 | { | |
182 | if (efip->efi_item.li_flags & XFS_LI_ABORTED) | |
065d312e | 183 | xfs_efi_item_free(efip); |
1da177e4 LT |
184 | return; |
185 | } | |
186 | ||
187 | /* | |
188 | * The EFI is logged only once and cannot be moved in the log, so | |
189 | * simply return the lsn at which it's been logged. The canceled | |
190 | * flag is not paid any attention here. Checking for that is delayed | |
191 | * until the EFI is unpinned. | |
192 | */ | |
193 | /*ARGSUSED*/ | |
194 | STATIC xfs_lsn_t | |
195 | xfs_efi_item_committed(xfs_efi_log_item_t *efip, xfs_lsn_t lsn) | |
196 | { | |
197 | return lsn; | |
198 | } | |
199 | ||
1da177e4 LT |
200 | /* |
201 | * There isn't much you can do to push on an efi item. It is simply | |
202 | * stuck waiting for all of its corresponding efd items to be | |
203 | * committed to disk. | |
204 | */ | |
205 | /*ARGSUSED*/ | |
206 | STATIC void | |
207 | xfs_efi_item_push(xfs_efi_log_item_t *efip) | |
208 | { | |
209 | return; | |
210 | } | |
211 | ||
212 | /* | |
213 | * The EFI dependency tracking op doesn't do squat. It can't because | |
214 | * it doesn't know where the free extent is coming from. The dependency | |
215 | * tracking has to be handled by the "enclosing" metadata object. For | |
216 | * example, for inodes, the inode is locked throughout the extent freeing | |
217 | * so the dependency should be recorded there. | |
218 | */ | |
219 | /*ARGSUSED*/ | |
220 | STATIC void | |
221 | xfs_efi_item_committing(xfs_efi_log_item_t *efip, xfs_lsn_t lsn) | |
222 | { | |
223 | return; | |
224 | } | |
225 | ||
226 | /* | |
227 | * This is the ops vector shared by all efi log items. | |
228 | */ | |
7989cb8e | 229 | static struct xfs_item_ops xfs_efi_item_ops = { |
1da177e4 LT |
230 | .iop_size = (uint(*)(xfs_log_item_t*))xfs_efi_item_size, |
231 | .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*)) | |
232 | xfs_efi_item_format, | |
233 | .iop_pin = (void(*)(xfs_log_item_t*))xfs_efi_item_pin, | |
234 | .iop_unpin = (void(*)(xfs_log_item_t*, int))xfs_efi_item_unpin, | |
235 | .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t *)) | |
236 | xfs_efi_item_unpin_remove, | |
237 | .iop_trylock = (uint(*)(xfs_log_item_t*))xfs_efi_item_trylock, | |
238 | .iop_unlock = (void(*)(xfs_log_item_t*))xfs_efi_item_unlock, | |
239 | .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t)) | |
240 | xfs_efi_item_committed, | |
241 | .iop_push = (void(*)(xfs_log_item_t*))xfs_efi_item_push, | |
1da177e4 LT |
242 | .iop_pushbuf = NULL, |
243 | .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) | |
244 | xfs_efi_item_committing | |
245 | }; | |
246 | ||
247 | ||
248 | /* | |
249 | * Allocate and initialize an efi item with the given number of extents. | |
250 | */ | |
251 | xfs_efi_log_item_t * | |
252 | xfs_efi_init(xfs_mount_t *mp, | |
253 | uint nextents) | |
254 | ||
255 | { | |
256 | xfs_efi_log_item_t *efip; | |
257 | uint size; | |
258 | ||
259 | ASSERT(nextents > 0); | |
260 | if (nextents > XFS_EFI_MAX_FAST_EXTENTS) { | |
261 | size = (uint)(sizeof(xfs_efi_log_item_t) + | |
262 | ((nextents - 1) * sizeof(xfs_extent_t))); | |
263 | efip = (xfs_efi_log_item_t*)kmem_zalloc(size, KM_SLEEP); | |
264 | } else { | |
265 | efip = (xfs_efi_log_item_t*)kmem_zone_zalloc(xfs_efi_zone, | |
266 | KM_SLEEP); | |
267 | } | |
268 | ||
269 | efip->efi_item.li_type = XFS_LI_EFI; | |
270 | efip->efi_item.li_ops = &xfs_efi_item_ops; | |
271 | efip->efi_item.li_mountp = mp; | |
272 | efip->efi_format.efi_nextents = nextents; | |
273 | efip->efi_format.efi_id = (__psint_t)(void*)efip; | |
274 | ||
275 | return (efip); | |
276 | } | |
277 | ||
6d192a9b TS |
278 | /* |
279 | * Copy an EFI format buffer from the given buf, and into the destination | |
280 | * EFI format structure. | |
281 | * The given buffer can be in 32 bit or 64 bit form (which has different padding), | |
282 | * one of which will be the native format for this kernel. | |
283 | * It will handle the conversion of formats if necessary. | |
284 | */ | |
285 | int | |
286 | xfs_efi_copy_format(xfs_log_iovec_t *buf, xfs_efi_log_format_t *dst_efi_fmt) | |
287 | { | |
288 | xfs_efi_log_format_t *src_efi_fmt = (xfs_efi_log_format_t *)buf->i_addr; | |
289 | uint i; | |
290 | uint len = sizeof(xfs_efi_log_format_t) + | |
291 | (src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_t); | |
292 | uint len32 = sizeof(xfs_efi_log_format_32_t) + | |
293 | (src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_32_t); | |
294 | uint len64 = sizeof(xfs_efi_log_format_64_t) + | |
295 | (src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_64_t); | |
296 | ||
297 | if (buf->i_len == len) { | |
298 | memcpy((char *)dst_efi_fmt, (char*)src_efi_fmt, len); | |
299 | return 0; | |
300 | } else if (buf->i_len == len32) { | |
301 | xfs_efi_log_format_32_t *src_efi_fmt_32 = | |
302 | (xfs_efi_log_format_32_t *)buf->i_addr; | |
303 | ||
304 | dst_efi_fmt->efi_type = src_efi_fmt_32->efi_type; | |
305 | dst_efi_fmt->efi_size = src_efi_fmt_32->efi_size; | |
306 | dst_efi_fmt->efi_nextents = src_efi_fmt_32->efi_nextents; | |
307 | dst_efi_fmt->efi_id = src_efi_fmt_32->efi_id; | |
308 | for (i = 0; i < dst_efi_fmt->efi_nextents; i++) { | |
309 | dst_efi_fmt->efi_extents[i].ext_start = | |
310 | src_efi_fmt_32->efi_extents[i].ext_start; | |
311 | dst_efi_fmt->efi_extents[i].ext_len = | |
312 | src_efi_fmt_32->efi_extents[i].ext_len; | |
313 | } | |
314 | return 0; | |
315 | } else if (buf->i_len == len64) { | |
316 | xfs_efi_log_format_64_t *src_efi_fmt_64 = | |
317 | (xfs_efi_log_format_64_t *)buf->i_addr; | |
318 | ||
319 | dst_efi_fmt->efi_type = src_efi_fmt_64->efi_type; | |
320 | dst_efi_fmt->efi_size = src_efi_fmt_64->efi_size; | |
321 | dst_efi_fmt->efi_nextents = src_efi_fmt_64->efi_nextents; | |
322 | dst_efi_fmt->efi_id = src_efi_fmt_64->efi_id; | |
323 | for (i = 0; i < dst_efi_fmt->efi_nextents; i++) { | |
324 | dst_efi_fmt->efi_extents[i].ext_start = | |
325 | src_efi_fmt_64->efi_extents[i].ext_start; | |
326 | dst_efi_fmt->efi_extents[i].ext_len = | |
327 | src_efi_fmt_64->efi_extents[i].ext_len; | |
328 | } | |
329 | return 0; | |
330 | } | |
331 | return EFSCORRUPTED; | |
332 | } | |
333 | ||
1da177e4 LT |
334 | /* |
335 | * This is called by the efd item code below to release references to | |
336 | * the given efi item. Each efd calls this with the number of | |
337 | * extents that it has logged, and when the sum of these reaches | |
338 | * the total number of extents logged by this efi item we can free | |
339 | * the efi item. | |
340 | * | |
341 | * Freeing the efi item requires that we remove it from the AIL. | |
342 | * We'll use the AIL lock to protect our counters as well as | |
343 | * the removal from the AIL. | |
344 | */ | |
345 | void | |
346 | xfs_efi_release(xfs_efi_log_item_t *efip, | |
347 | uint nextents) | |
348 | { | |
349 | xfs_mount_t *mp; | |
350 | int extents_left; | |
1da177e4 LT |
351 | |
352 | mp = efip->efi_item.li_mountp; | |
353 | ASSERT(efip->efi_next_extent > 0); | |
354 | ASSERT(efip->efi_flags & XFS_EFI_COMMITTED); | |
355 | ||
287f3dad | 356 | spin_lock(&mp->m_ail_lock); |
1da177e4 LT |
357 | ASSERT(efip->efi_next_extent >= nextents); |
358 | efip->efi_next_extent -= nextents; | |
359 | extents_left = efip->efi_next_extent; | |
360 | if (extents_left == 0) { | |
361 | /* | |
362 | * xfs_trans_delete_ail() drops the AIL lock. | |
363 | */ | |
287f3dad | 364 | xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip); |
7d795ca3 | 365 | xfs_efi_item_free(efip); |
1da177e4 | 366 | } else { |
287f3dad | 367 | spin_unlock(&mp->m_ail_lock); |
1da177e4 | 368 | } |
1da177e4 LT |
369 | } |
370 | ||
7d795ca3 CH |
371 | STATIC void |
372 | xfs_efd_item_free(xfs_efd_log_item_t *efdp) | |
373 | { | |
374 | int nexts = efdp->efd_format.efd_nextents; | |
1da177e4 | 375 | |
7d795ca3 CH |
376 | if (nexts > XFS_EFD_MAX_FAST_EXTENTS) { |
377 | kmem_free(efdp, sizeof(xfs_efd_log_item_t) + | |
378 | (nexts - 1) * sizeof(xfs_extent_t)); | |
379 | } else { | |
380 | kmem_zone_free(xfs_efd_zone, efdp); | |
381 | } | |
382 | } | |
1da177e4 LT |
383 | |
384 | /* | |
385 | * This returns the number of iovecs needed to log the given efd item. | |
386 | * We only need 1 iovec for an efd item. It just logs the efd_log_format | |
387 | * structure. | |
388 | */ | |
389 | /*ARGSUSED*/ | |
390 | STATIC uint | |
391 | xfs_efd_item_size(xfs_efd_log_item_t *efdp) | |
392 | { | |
393 | return 1; | |
394 | } | |
395 | ||
396 | /* | |
397 | * This is called to fill in the vector of log iovecs for the | |
398 | * given efd log item. We use only 1 iovec, and we point that | |
399 | * at the efd_log_format structure embedded in the efd item. | |
400 | * It is at this point that we assert that all of the extent | |
401 | * slots in the efd item have been filled. | |
402 | */ | |
403 | STATIC void | |
404 | xfs_efd_item_format(xfs_efd_log_item_t *efdp, | |
405 | xfs_log_iovec_t *log_vector) | |
406 | { | |
407 | uint size; | |
408 | ||
409 | ASSERT(efdp->efd_next_extent == efdp->efd_format.efd_nextents); | |
410 | ||
411 | efdp->efd_format.efd_type = XFS_LI_EFD; | |
412 | ||
413 | size = sizeof(xfs_efd_log_format_t); | |
414 | size += (efdp->efd_format.efd_nextents - 1) * sizeof(xfs_extent_t); | |
415 | efdp->efd_format.efd_size = 1; | |
416 | ||
417 | log_vector->i_addr = (xfs_caddr_t)&(efdp->efd_format); | |
418 | log_vector->i_len = size; | |
7e9c6396 | 419 | XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_EFD_FORMAT); |
1da177e4 LT |
420 | ASSERT(size >= sizeof(xfs_efd_log_format_t)); |
421 | } | |
422 | ||
423 | ||
424 | /* | |
425 | * Pinning has no meaning for an efd item, so just return. | |
426 | */ | |
427 | /*ARGSUSED*/ | |
428 | STATIC void | |
429 | xfs_efd_item_pin(xfs_efd_log_item_t *efdp) | |
430 | { | |
431 | return; | |
432 | } | |
433 | ||
434 | ||
435 | /* | |
436 | * Since pinning has no meaning for an efd item, unpinning does | |
437 | * not either. | |
438 | */ | |
439 | /*ARGSUSED*/ | |
440 | STATIC void | |
441 | xfs_efd_item_unpin(xfs_efd_log_item_t *efdp, int stale) | |
442 | { | |
443 | return; | |
444 | } | |
445 | ||
446 | /*ARGSUSED*/ | |
447 | STATIC void | |
448 | xfs_efd_item_unpin_remove(xfs_efd_log_item_t *efdp, xfs_trans_t *tp) | |
449 | { | |
450 | return; | |
451 | } | |
452 | ||
453 | /* | |
454 | * Efd items have no locking, so just return success. | |
455 | */ | |
456 | /*ARGSUSED*/ | |
457 | STATIC uint | |
458 | xfs_efd_item_trylock(xfs_efd_log_item_t *efdp) | |
459 | { | |
460 | return XFS_ITEM_LOCKED; | |
461 | } | |
462 | ||
463 | /* | |
464 | * Efd items have no locking or pushing, so return failure | |
465 | * so that the caller doesn't bother with us. | |
466 | */ | |
467 | /*ARGSUSED*/ | |
468 | STATIC void | |
469 | xfs_efd_item_unlock(xfs_efd_log_item_t *efdp) | |
470 | { | |
471 | if (efdp->efd_item.li_flags & XFS_LI_ABORTED) | |
065d312e | 472 | xfs_efd_item_free(efdp); |
1da177e4 LT |
473 | return; |
474 | } | |
475 | ||
476 | /* | |
477 | * When the efd item is committed to disk, all we need to do | |
478 | * is delete our reference to our partner efi item and then | |
479 | * free ourselves. Since we're freeing ourselves we must | |
480 | * return -1 to keep the transaction code from further referencing | |
481 | * this item. | |
482 | */ | |
483 | /*ARGSUSED*/ | |
484 | STATIC xfs_lsn_t | |
485 | xfs_efd_item_committed(xfs_efd_log_item_t *efdp, xfs_lsn_t lsn) | |
486 | { | |
1da177e4 LT |
487 | /* |
488 | * If we got a log I/O error, it's always the case that the LR with the | |
489 | * EFI got unpinned and freed before the EFD got aborted. | |
490 | */ | |
491 | if ((efdp->efd_item.li_flags & XFS_LI_ABORTED) == 0) | |
492 | xfs_efi_release(efdp->efd_efip, efdp->efd_format.efd_nextents); | |
493 | ||
7d795ca3 | 494 | xfs_efd_item_free(efdp); |
1da177e4 LT |
495 | return (xfs_lsn_t)-1; |
496 | } | |
497 | ||
1da177e4 LT |
498 | /* |
499 | * There isn't much you can do to push on an efd item. It is simply | |
500 | * stuck waiting for the log to be flushed to disk. | |
501 | */ | |
502 | /*ARGSUSED*/ | |
503 | STATIC void | |
504 | xfs_efd_item_push(xfs_efd_log_item_t *efdp) | |
505 | { | |
506 | return; | |
507 | } | |
508 | ||
509 | /* | |
510 | * The EFD dependency tracking op doesn't do squat. It can't because | |
511 | * it doesn't know where the free extent is coming from. The dependency | |
512 | * tracking has to be handled by the "enclosing" metadata object. For | |
513 | * example, for inodes, the inode is locked throughout the extent freeing | |
514 | * so the dependency should be recorded there. | |
515 | */ | |
516 | /*ARGSUSED*/ | |
517 | STATIC void | |
518 | xfs_efd_item_committing(xfs_efd_log_item_t *efip, xfs_lsn_t lsn) | |
519 | { | |
520 | return; | |
521 | } | |
522 | ||
523 | /* | |
524 | * This is the ops vector shared by all efd log items. | |
525 | */ | |
7989cb8e | 526 | static struct xfs_item_ops xfs_efd_item_ops = { |
1da177e4 LT |
527 | .iop_size = (uint(*)(xfs_log_item_t*))xfs_efd_item_size, |
528 | .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*)) | |
529 | xfs_efd_item_format, | |
530 | .iop_pin = (void(*)(xfs_log_item_t*))xfs_efd_item_pin, | |
531 | .iop_unpin = (void(*)(xfs_log_item_t*, int))xfs_efd_item_unpin, | |
532 | .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*)) | |
533 | xfs_efd_item_unpin_remove, | |
534 | .iop_trylock = (uint(*)(xfs_log_item_t*))xfs_efd_item_trylock, | |
535 | .iop_unlock = (void(*)(xfs_log_item_t*))xfs_efd_item_unlock, | |
536 | .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t)) | |
537 | xfs_efd_item_committed, | |
538 | .iop_push = (void(*)(xfs_log_item_t*))xfs_efd_item_push, | |
1da177e4 LT |
539 | .iop_pushbuf = NULL, |
540 | .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) | |
541 | xfs_efd_item_committing | |
542 | }; | |
543 | ||
544 | ||
545 | /* | |
546 | * Allocate and initialize an efd item with the given number of extents. | |
547 | */ | |
548 | xfs_efd_log_item_t * | |
549 | xfs_efd_init(xfs_mount_t *mp, | |
550 | xfs_efi_log_item_t *efip, | |
551 | uint nextents) | |
552 | ||
553 | { | |
554 | xfs_efd_log_item_t *efdp; | |
555 | uint size; | |
556 | ||
557 | ASSERT(nextents > 0); | |
558 | if (nextents > XFS_EFD_MAX_FAST_EXTENTS) { | |
559 | size = (uint)(sizeof(xfs_efd_log_item_t) + | |
560 | ((nextents - 1) * sizeof(xfs_extent_t))); | |
561 | efdp = (xfs_efd_log_item_t*)kmem_zalloc(size, KM_SLEEP); | |
562 | } else { | |
563 | efdp = (xfs_efd_log_item_t*)kmem_zone_zalloc(xfs_efd_zone, | |
564 | KM_SLEEP); | |
565 | } | |
566 | ||
567 | efdp->efd_item.li_type = XFS_LI_EFD; | |
568 | efdp->efd_item.li_ops = &xfs_efd_item_ops; | |
569 | efdp->efd_item.li_mountp = mp; | |
570 | efdp->efd_efip = efip; | |
571 | efdp->efd_format.efd_nextents = nextents; | |
572 | efdp->efd_format.efd_efi_id = efip->efi_format.efi_id; | |
573 | ||
574 | return (efdp); | |
575 | } |