]>
Commit | Line | Data |
---|---|---|
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" |
239880ef DC |
20 | #include "xfs_log_format.h" |
21 | #include "xfs_trans_resv.h" | |
1da177e4 | 22 | #include "xfs_sb.h" |
da353b0d | 23 | #include "xfs_ag.h" |
1da177e4 | 24 | #include "xfs_mount.h" |
239880ef | 25 | #include "xfs_trans.h" |
1da177e4 | 26 | #include "xfs_trans_priv.h" |
239880ef | 27 | #include "xfs_buf_item.h" |
1da177e4 | 28 | #include "xfs_extfree_item.h" |
1234351c | 29 | #include "xfs_log.h" |
1da177e4 LT |
30 | |
31 | ||
32 | kmem_zone_t *xfs_efi_zone; | |
33 | kmem_zone_t *xfs_efd_zone; | |
34 | ||
7bfa31d8 CH |
35 | static inline struct xfs_efi_log_item *EFI_ITEM(struct xfs_log_item *lip) |
36 | { | |
37 | return container_of(lip, struct xfs_efi_log_item, efi_item); | |
38 | } | |
1da177e4 | 39 | |
7d795ca3 | 40 | void |
7bfa31d8 CH |
41 | xfs_efi_item_free( |
42 | struct xfs_efi_log_item *efip) | |
7d795ca3 | 43 | { |
7bfa31d8 | 44 | if (efip->efi_format.efi_nextents > XFS_EFI_MAX_FAST_EXTENTS) |
f0e2d93c | 45 | kmem_free(efip); |
7bfa31d8 | 46 | else |
7d795ca3 | 47 | kmem_zone_free(xfs_efi_zone, efip); |
7d795ca3 | 48 | } |
1da177e4 | 49 | |
b199c8a4 DC |
50 | /* |
51 | * Freeing the efi requires that we remove it from the AIL if it has already | |
52 | * been placed there. However, the EFI may not yet have been placed in the AIL | |
53 | * when called by xfs_efi_release() from EFD processing due to the ordering of | |
666d644c DC |
54 | * committed vs unpin operations in bulk insert operations. Hence the reference |
55 | * count to ensure only the last caller frees the EFI. | |
b199c8a4 DC |
56 | */ |
57 | STATIC void | |
58 | __xfs_efi_release( | |
59 | struct xfs_efi_log_item *efip) | |
60 | { | |
61 | struct xfs_ail *ailp = efip->efi_item.li_ailp; | |
62 | ||
666d644c | 63 | if (atomic_dec_and_test(&efip->efi_refcount)) { |
b199c8a4 DC |
64 | spin_lock(&ailp->xa_lock); |
65 | /* xfs_trans_ail_delete() drops the AIL lock. */ | |
04913fdd DC |
66 | xfs_trans_ail_delete(ailp, &efip->efi_item, |
67 | SHUTDOWN_LOG_IO_ERROR); | |
b199c8a4 DC |
68 | xfs_efi_item_free(efip); |
69 | } | |
70 | } | |
71 | ||
1da177e4 LT |
72 | /* |
73 | * This returns the number of iovecs needed to log the given efi item. | |
74 | * We only need 1 iovec for an efi item. It just logs the efi_log_format | |
75 | * structure. | |
76 | */ | |
166d1368 DC |
77 | static inline int |
78 | xfs_efi_item_sizeof( | |
79 | struct xfs_efi_log_item *efip) | |
80 | { | |
81 | return sizeof(struct xfs_efi_log_format) + | |
82 | (efip->efi_format.efi_nextents - 1) * sizeof(xfs_extent_t); | |
83 | } | |
84 | ||
85 | STATIC void | |
7bfa31d8 | 86 | xfs_efi_item_size( |
166d1368 DC |
87 | struct xfs_log_item *lip, |
88 | int *nvecs, | |
89 | int *nbytes) | |
1da177e4 | 90 | { |
166d1368 DC |
91 | *nvecs += 1; |
92 | *nbytes += xfs_efi_item_sizeof(EFI_ITEM(lip)); | |
1da177e4 LT |
93 | } |
94 | ||
95 | /* | |
96 | * This is called to fill in the vector of log iovecs for the | |
97 | * given efi log item. We use only 1 iovec, and we point that | |
98 | * at the efi_log_format structure embedded in the efi item. | |
99 | * It is at this point that we assert that all of the extent | |
100 | * slots in the efi item have been filled. | |
101 | */ | |
102 | STATIC void | |
7bfa31d8 CH |
103 | xfs_efi_item_format( |
104 | struct xfs_log_item *lip, | |
bde7cff6 | 105 | struct xfs_log_vec *lv) |
1da177e4 | 106 | { |
7bfa31d8 | 107 | struct xfs_efi_log_item *efip = EFI_ITEM(lip); |
bde7cff6 | 108 | struct xfs_log_iovec *vecp = NULL; |
1da177e4 | 109 | |
b199c8a4 DC |
110 | ASSERT(atomic_read(&efip->efi_next_extent) == |
111 | efip->efi_format.efi_nextents); | |
1da177e4 LT |
112 | |
113 | efip->efi_format.efi_type = XFS_LI_EFI; | |
1da177e4 LT |
114 | efip->efi_format.efi_size = 1; |
115 | ||
bde7cff6 | 116 | xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_EFI_FORMAT, |
1234351c CH |
117 | &efip->efi_format, |
118 | xfs_efi_item_sizeof(efip)); | |
1da177e4 LT |
119 | } |
120 | ||
121 | ||
122 | /* | |
123 | * Pinning has no meaning for an efi item, so just return. | |
124 | */ | |
1da177e4 | 125 | STATIC void |
7bfa31d8 CH |
126 | xfs_efi_item_pin( |
127 | struct xfs_log_item *lip) | |
1da177e4 | 128 | { |
1da177e4 LT |
129 | } |
130 | ||
1da177e4 | 131 | /* |
9c5f8414 DC |
132 | * While EFIs cannot really be pinned, the unpin operation is the last place at |
133 | * which the EFI is manipulated during a transaction. If we are being asked to | |
134 | * remove the EFI it's because the transaction has been cancelled and by | |
135 | * definition that means the EFI cannot be in the AIL so remove it from the | |
666d644c DC |
136 | * transaction and free it. Otherwise coordinate with xfs_efi_release() |
137 | * to determine who gets to free the EFI. | |
1da177e4 | 138 | */ |
1da177e4 | 139 | STATIC void |
7bfa31d8 CH |
140 | xfs_efi_item_unpin( |
141 | struct xfs_log_item *lip, | |
142 | int remove) | |
1da177e4 | 143 | { |
7bfa31d8 | 144 | struct xfs_efi_log_item *efip = EFI_ITEM(lip); |
1da177e4 | 145 | |
9c5f8414 DC |
146 | if (remove) { |
147 | ASSERT(!(lip->li_flags & XFS_LI_IN_AIL)); | |
e34a314c DC |
148 | if (lip->li_desc) |
149 | xfs_trans_del_item(lip); | |
7d795ca3 | 150 | xfs_efi_item_free(efip); |
b199c8a4 | 151 | return; |
1da177e4 | 152 | } |
b199c8a4 | 153 | __xfs_efi_release(efip); |
1da177e4 LT |
154 | } |
155 | ||
156 | /* | |
43ff2122 CH |
157 | * Efi items have no locking or pushing. However, since EFIs are pulled from |
158 | * the AIL when their corresponding EFDs are committed to disk, their situation | |
159 | * is very similar to being pinned. Return XFS_ITEM_PINNED so that the caller | |
160 | * will eventually flush the log. This should help in getting the EFI out of | |
161 | * the AIL. | |
1da177e4 | 162 | */ |
1da177e4 | 163 | STATIC uint |
43ff2122 CH |
164 | xfs_efi_item_push( |
165 | struct xfs_log_item *lip, | |
166 | struct list_head *buffer_list) | |
1da177e4 LT |
167 | { |
168 | return XFS_ITEM_PINNED; | |
169 | } | |
170 | ||
1da177e4 | 171 | STATIC void |
7bfa31d8 CH |
172 | xfs_efi_item_unlock( |
173 | struct xfs_log_item *lip) | |
1da177e4 | 174 | { |
7bfa31d8 CH |
175 | if (lip->li_flags & XFS_LI_ABORTED) |
176 | xfs_efi_item_free(EFI_ITEM(lip)); | |
1da177e4 LT |
177 | } |
178 | ||
179 | /* | |
b199c8a4 | 180 | * The EFI is logged only once and cannot be moved in the log, so simply return |
666d644c | 181 | * the lsn at which it's been logged. |
1da177e4 | 182 | */ |
1da177e4 | 183 | STATIC xfs_lsn_t |
7bfa31d8 CH |
184 | xfs_efi_item_committed( |
185 | struct xfs_log_item *lip, | |
186 | xfs_lsn_t lsn) | |
1da177e4 LT |
187 | { |
188 | return lsn; | |
189 | } | |
190 | ||
1da177e4 LT |
191 | /* |
192 | * The EFI dependency tracking op doesn't do squat. It can't because | |
193 | * it doesn't know where the free extent is coming from. The dependency | |
194 | * tracking has to be handled by the "enclosing" metadata object. For | |
195 | * example, for inodes, the inode is locked throughout the extent freeing | |
196 | * so the dependency should be recorded there. | |
197 | */ | |
1da177e4 | 198 | STATIC void |
7bfa31d8 CH |
199 | xfs_efi_item_committing( |
200 | struct xfs_log_item *lip, | |
201 | xfs_lsn_t lsn) | |
1da177e4 | 202 | { |
1da177e4 LT |
203 | } |
204 | ||
205 | /* | |
206 | * This is the ops vector shared by all efi log items. | |
207 | */ | |
272e42b2 | 208 | static const struct xfs_item_ops xfs_efi_item_ops = { |
7bfa31d8 CH |
209 | .iop_size = xfs_efi_item_size, |
210 | .iop_format = xfs_efi_item_format, | |
211 | .iop_pin = xfs_efi_item_pin, | |
212 | .iop_unpin = xfs_efi_item_unpin, | |
7bfa31d8 CH |
213 | .iop_unlock = xfs_efi_item_unlock, |
214 | .iop_committed = xfs_efi_item_committed, | |
215 | .iop_push = xfs_efi_item_push, | |
216 | .iop_committing = xfs_efi_item_committing | |
1da177e4 LT |
217 | }; |
218 | ||
219 | ||
220 | /* | |
221 | * Allocate and initialize an efi item with the given number of extents. | |
222 | */ | |
7bfa31d8 CH |
223 | struct xfs_efi_log_item * |
224 | xfs_efi_init( | |
225 | struct xfs_mount *mp, | |
226 | uint nextents) | |
1da177e4 LT |
227 | |
228 | { | |
7bfa31d8 | 229 | struct xfs_efi_log_item *efip; |
1da177e4 LT |
230 | uint size; |
231 | ||
232 | ASSERT(nextents > 0); | |
233 | if (nextents > XFS_EFI_MAX_FAST_EXTENTS) { | |
234 | size = (uint)(sizeof(xfs_efi_log_item_t) + | |
235 | ((nextents - 1) * sizeof(xfs_extent_t))); | |
7bfa31d8 | 236 | efip = kmem_zalloc(size, KM_SLEEP); |
1da177e4 | 237 | } else { |
7bfa31d8 | 238 | efip = kmem_zone_zalloc(xfs_efi_zone, KM_SLEEP); |
1da177e4 LT |
239 | } |
240 | ||
43f5efc5 | 241 | xfs_log_item_init(mp, &efip->efi_item, XFS_LI_EFI, &xfs_efi_item_ops); |
1da177e4 LT |
242 | efip->efi_format.efi_nextents = nextents; |
243 | efip->efi_format.efi_id = (__psint_t)(void*)efip; | |
b199c8a4 | 244 | atomic_set(&efip->efi_next_extent, 0); |
666d644c | 245 | atomic_set(&efip->efi_refcount, 2); |
1da177e4 | 246 | |
7bfa31d8 | 247 | return efip; |
1da177e4 LT |
248 | } |
249 | ||
6d192a9b TS |
250 | /* |
251 | * Copy an EFI format buffer from the given buf, and into the destination | |
252 | * EFI format structure. | |
253 | * The given buffer can be in 32 bit or 64 bit form (which has different padding), | |
254 | * one of which will be the native format for this kernel. | |
255 | * It will handle the conversion of formats if necessary. | |
256 | */ | |
257 | int | |
258 | xfs_efi_copy_format(xfs_log_iovec_t *buf, xfs_efi_log_format_t *dst_efi_fmt) | |
259 | { | |
4e0d5f92 | 260 | xfs_efi_log_format_t *src_efi_fmt = buf->i_addr; |
6d192a9b TS |
261 | uint i; |
262 | uint len = sizeof(xfs_efi_log_format_t) + | |
263 | (src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_t); | |
264 | uint len32 = sizeof(xfs_efi_log_format_32_t) + | |
265 | (src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_32_t); | |
266 | uint len64 = sizeof(xfs_efi_log_format_64_t) + | |
267 | (src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_64_t); | |
268 | ||
269 | if (buf->i_len == len) { | |
270 | memcpy((char *)dst_efi_fmt, (char*)src_efi_fmt, len); | |
271 | return 0; | |
272 | } else if (buf->i_len == len32) { | |
4e0d5f92 | 273 | xfs_efi_log_format_32_t *src_efi_fmt_32 = buf->i_addr; |
6d192a9b TS |
274 | |
275 | dst_efi_fmt->efi_type = src_efi_fmt_32->efi_type; | |
276 | dst_efi_fmt->efi_size = src_efi_fmt_32->efi_size; | |
277 | dst_efi_fmt->efi_nextents = src_efi_fmt_32->efi_nextents; | |
278 | dst_efi_fmt->efi_id = src_efi_fmt_32->efi_id; | |
279 | for (i = 0; i < dst_efi_fmt->efi_nextents; i++) { | |
280 | dst_efi_fmt->efi_extents[i].ext_start = | |
281 | src_efi_fmt_32->efi_extents[i].ext_start; | |
282 | dst_efi_fmt->efi_extents[i].ext_len = | |
283 | src_efi_fmt_32->efi_extents[i].ext_len; | |
284 | } | |
285 | return 0; | |
286 | } else if (buf->i_len == len64) { | |
4e0d5f92 | 287 | xfs_efi_log_format_64_t *src_efi_fmt_64 = buf->i_addr; |
6d192a9b TS |
288 | |
289 | dst_efi_fmt->efi_type = src_efi_fmt_64->efi_type; | |
290 | dst_efi_fmt->efi_size = src_efi_fmt_64->efi_size; | |
291 | dst_efi_fmt->efi_nextents = src_efi_fmt_64->efi_nextents; | |
292 | dst_efi_fmt->efi_id = src_efi_fmt_64->efi_id; | |
293 | for (i = 0; i < dst_efi_fmt->efi_nextents; i++) { | |
294 | dst_efi_fmt->efi_extents[i].ext_start = | |
295 | src_efi_fmt_64->efi_extents[i].ext_start; | |
296 | dst_efi_fmt->efi_extents[i].ext_len = | |
297 | src_efi_fmt_64->efi_extents[i].ext_len; | |
298 | } | |
299 | return 0; | |
300 | } | |
2451337d | 301 | return -EFSCORRUPTED; |
6d192a9b TS |
302 | } |
303 | ||
1da177e4 | 304 | /* |
b199c8a4 DC |
305 | * This is called by the efd item code below to release references to the given |
306 | * efi item. Each efd calls this with the number of extents that it has | |
307 | * logged, and when the sum of these reaches the total number of extents logged | |
308 | * by this efi item we can free the efi item. | |
1da177e4 LT |
309 | */ |
310 | void | |
311 | xfs_efi_release(xfs_efi_log_item_t *efip, | |
312 | uint nextents) | |
313 | { | |
b199c8a4 | 314 | ASSERT(atomic_read(&efip->efi_next_extent) >= nextents); |
666d644c | 315 | if (atomic_sub_and_test(nextents, &efip->efi_next_extent)) { |
666d644c DC |
316 | /* recovery needs us to drop the EFI reference, too */ |
317 | if (test_bit(XFS_EFI_RECOVERED, &efip->efi_flags)) | |
318 | __xfs_efi_release(efip); | |
509e708a DC |
319 | |
320 | __xfs_efi_release(efip); | |
321 | /* efip may now have been freed, do not reference it again. */ | |
666d644c | 322 | } |
1da177e4 LT |
323 | } |
324 | ||
7bfa31d8 | 325 | static inline struct xfs_efd_log_item *EFD_ITEM(struct xfs_log_item *lip) |
7d795ca3 | 326 | { |
7bfa31d8 CH |
327 | return container_of(lip, struct xfs_efd_log_item, efd_item); |
328 | } | |
1da177e4 | 329 | |
7bfa31d8 CH |
330 | STATIC void |
331 | xfs_efd_item_free(struct xfs_efd_log_item *efdp) | |
332 | { | |
333 | if (efdp->efd_format.efd_nextents > XFS_EFD_MAX_FAST_EXTENTS) | |
f0e2d93c | 334 | kmem_free(efdp); |
7bfa31d8 | 335 | else |
7d795ca3 | 336 | kmem_zone_free(xfs_efd_zone, efdp); |
7d795ca3 | 337 | } |
1da177e4 LT |
338 | |
339 | /* | |
340 | * This returns the number of iovecs needed to log the given efd item. | |
341 | * We only need 1 iovec for an efd item. It just logs the efd_log_format | |
342 | * structure. | |
343 | */ | |
166d1368 DC |
344 | static inline int |
345 | xfs_efd_item_sizeof( | |
346 | struct xfs_efd_log_item *efdp) | |
347 | { | |
348 | return sizeof(xfs_efd_log_format_t) + | |
349 | (efdp->efd_format.efd_nextents - 1) * sizeof(xfs_extent_t); | |
350 | } | |
351 | ||
352 | STATIC void | |
7bfa31d8 | 353 | xfs_efd_item_size( |
166d1368 DC |
354 | struct xfs_log_item *lip, |
355 | int *nvecs, | |
356 | int *nbytes) | |
1da177e4 | 357 | { |
166d1368 DC |
358 | *nvecs += 1; |
359 | *nbytes += xfs_efd_item_sizeof(EFD_ITEM(lip)); | |
1da177e4 LT |
360 | } |
361 | ||
362 | /* | |
363 | * This is called to fill in the vector of log iovecs for the | |
364 | * given efd log item. We use only 1 iovec, and we point that | |
365 | * at the efd_log_format structure embedded in the efd item. | |
366 | * It is at this point that we assert that all of the extent | |
367 | * slots in the efd item have been filled. | |
368 | */ | |
369 | STATIC void | |
7bfa31d8 CH |
370 | xfs_efd_item_format( |
371 | struct xfs_log_item *lip, | |
bde7cff6 | 372 | struct xfs_log_vec *lv) |
1da177e4 | 373 | { |
7bfa31d8 | 374 | struct xfs_efd_log_item *efdp = EFD_ITEM(lip); |
bde7cff6 | 375 | struct xfs_log_iovec *vecp = NULL; |
1da177e4 LT |
376 | |
377 | ASSERT(efdp->efd_next_extent == efdp->efd_format.efd_nextents); | |
378 | ||
379 | efdp->efd_format.efd_type = XFS_LI_EFD; | |
1da177e4 LT |
380 | efdp->efd_format.efd_size = 1; |
381 | ||
bde7cff6 | 382 | xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_EFD_FORMAT, |
1234351c CH |
383 | &efdp->efd_format, |
384 | xfs_efd_item_sizeof(efdp)); | |
1da177e4 LT |
385 | } |
386 | ||
1da177e4 LT |
387 | /* |
388 | * Pinning has no meaning for an efd item, so just return. | |
389 | */ | |
1da177e4 | 390 | STATIC void |
7bfa31d8 CH |
391 | xfs_efd_item_pin( |
392 | struct xfs_log_item *lip) | |
1da177e4 | 393 | { |
1da177e4 LT |
394 | } |
395 | ||
1da177e4 LT |
396 | /* |
397 | * Since pinning has no meaning for an efd item, unpinning does | |
398 | * not either. | |
399 | */ | |
1da177e4 | 400 | STATIC void |
7bfa31d8 CH |
401 | xfs_efd_item_unpin( |
402 | struct xfs_log_item *lip, | |
403 | int remove) | |
1da177e4 | 404 | { |
1da177e4 LT |
405 | } |
406 | ||
407 | /* | |
43ff2122 CH |
408 | * There isn't much you can do to push on an efd item. It is simply stuck |
409 | * waiting for the log to be flushed to disk. | |
1da177e4 | 410 | */ |
1da177e4 | 411 | STATIC uint |
43ff2122 CH |
412 | xfs_efd_item_push( |
413 | struct xfs_log_item *lip, | |
414 | struct list_head *buffer_list) | |
1da177e4 | 415 | { |
43ff2122 | 416 | return XFS_ITEM_PINNED; |
1da177e4 LT |
417 | } |
418 | ||
1da177e4 | 419 | STATIC void |
7bfa31d8 CH |
420 | xfs_efd_item_unlock( |
421 | struct xfs_log_item *lip) | |
1da177e4 | 422 | { |
7bfa31d8 CH |
423 | if (lip->li_flags & XFS_LI_ABORTED) |
424 | xfs_efd_item_free(EFD_ITEM(lip)); | |
1da177e4 LT |
425 | } |
426 | ||
427 | /* | |
428 | * When the efd item is committed to disk, all we need to do | |
429 | * is delete our reference to our partner efi item and then | |
430 | * free ourselves. Since we're freeing ourselves we must | |
431 | * return -1 to keep the transaction code from further referencing | |
432 | * this item. | |
433 | */ | |
1da177e4 | 434 | STATIC xfs_lsn_t |
7bfa31d8 CH |
435 | xfs_efd_item_committed( |
436 | struct xfs_log_item *lip, | |
437 | xfs_lsn_t lsn) | |
1da177e4 | 438 | { |
7bfa31d8 CH |
439 | struct xfs_efd_log_item *efdp = EFD_ITEM(lip); |
440 | ||
1da177e4 LT |
441 | /* |
442 | * If we got a log I/O error, it's always the case that the LR with the | |
443 | * EFI got unpinned and freed before the EFD got aborted. | |
444 | */ | |
7bfa31d8 | 445 | if (!(lip->li_flags & XFS_LI_ABORTED)) |
1da177e4 LT |
446 | xfs_efi_release(efdp->efd_efip, efdp->efd_format.efd_nextents); |
447 | ||
7d795ca3 | 448 | xfs_efd_item_free(efdp); |
1da177e4 LT |
449 | return (xfs_lsn_t)-1; |
450 | } | |
451 | ||
1da177e4 LT |
452 | /* |
453 | * The EFD dependency tracking op doesn't do squat. It can't because | |
454 | * it doesn't know where the free extent is coming from. The dependency | |
455 | * tracking has to be handled by the "enclosing" metadata object. For | |
456 | * example, for inodes, the inode is locked throughout the extent freeing | |
457 | * so the dependency should be recorded there. | |
458 | */ | |
1da177e4 | 459 | STATIC void |
7bfa31d8 CH |
460 | xfs_efd_item_committing( |
461 | struct xfs_log_item *lip, | |
462 | xfs_lsn_t lsn) | |
1da177e4 | 463 | { |
1da177e4 LT |
464 | } |
465 | ||
466 | /* | |
467 | * This is the ops vector shared by all efd log items. | |
468 | */ | |
272e42b2 | 469 | static const struct xfs_item_ops xfs_efd_item_ops = { |
7bfa31d8 CH |
470 | .iop_size = xfs_efd_item_size, |
471 | .iop_format = xfs_efd_item_format, | |
472 | .iop_pin = xfs_efd_item_pin, | |
473 | .iop_unpin = xfs_efd_item_unpin, | |
7bfa31d8 CH |
474 | .iop_unlock = xfs_efd_item_unlock, |
475 | .iop_committed = xfs_efd_item_committed, | |
476 | .iop_push = xfs_efd_item_push, | |
477 | .iop_committing = xfs_efd_item_committing | |
1da177e4 LT |
478 | }; |
479 | ||
1da177e4 LT |
480 | /* |
481 | * Allocate and initialize an efd item with the given number of extents. | |
482 | */ | |
7bfa31d8 CH |
483 | struct xfs_efd_log_item * |
484 | xfs_efd_init( | |
485 | struct xfs_mount *mp, | |
486 | struct xfs_efi_log_item *efip, | |
487 | uint nextents) | |
1da177e4 LT |
488 | |
489 | { | |
7bfa31d8 | 490 | struct xfs_efd_log_item *efdp; |
1da177e4 LT |
491 | uint size; |
492 | ||
493 | ASSERT(nextents > 0); | |
494 | if (nextents > XFS_EFD_MAX_FAST_EXTENTS) { | |
495 | size = (uint)(sizeof(xfs_efd_log_item_t) + | |
496 | ((nextents - 1) * sizeof(xfs_extent_t))); | |
7bfa31d8 | 497 | efdp = kmem_zalloc(size, KM_SLEEP); |
1da177e4 | 498 | } else { |
7bfa31d8 | 499 | efdp = kmem_zone_zalloc(xfs_efd_zone, KM_SLEEP); |
1da177e4 LT |
500 | } |
501 | ||
43f5efc5 | 502 | xfs_log_item_init(mp, &efdp->efd_item, XFS_LI_EFD, &xfs_efd_item_ops); |
1da177e4 LT |
503 | efdp->efd_efip = efip; |
504 | efdp->efd_format.efd_nextents = nextents; | |
505 | efdp->efd_format.efd_efi_id = efip->efi_format.efi_id; | |
506 | ||
7bfa31d8 | 507 | return efdp; |
1da177e4 | 508 | } |