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 LT |
21 | #include "xfs_log.h" |
22 | #include "xfs_trans.h" | |
23 | #include "xfs_buf_item.h" | |
24 | #include "xfs_sb.h" | |
da353b0d | 25 | #include "xfs_ag.h" |
1da177e4 LT |
26 | #include "xfs_mount.h" |
27 | #include "xfs_trans_priv.h" | |
28 | #include "xfs_extfree_item.h" | |
29 | ||
30 | ||
31 | kmem_zone_t *xfs_efi_zone; | |
32 | kmem_zone_t *xfs_efd_zone; | |
33 | ||
7bfa31d8 CH |
34 | static inline struct xfs_efi_log_item *EFI_ITEM(struct xfs_log_item *lip) |
35 | { | |
36 | return container_of(lip, struct xfs_efi_log_item, efi_item); | |
37 | } | |
1da177e4 | 38 | |
7d795ca3 | 39 | void |
7bfa31d8 CH |
40 | xfs_efi_item_free( |
41 | struct xfs_efi_log_item *efip) | |
7d795ca3 | 42 | { |
7bfa31d8 | 43 | if (efip->efi_format.efi_nextents > XFS_EFI_MAX_FAST_EXTENTS) |
f0e2d93c | 44 | kmem_free(efip); |
7bfa31d8 | 45 | else |
7d795ca3 | 46 | kmem_zone_free(xfs_efi_zone, efip); |
7d795ca3 | 47 | } |
1da177e4 | 48 | |
b199c8a4 DC |
49 | /* |
50 | * Freeing the efi requires that we remove it from the AIL if it has already | |
51 | * been placed there. However, the EFI may not yet have been placed in the AIL | |
52 | * when called by xfs_efi_release() from EFD processing due to the ordering of | |
53 | * committed vs unpin operations in bulk insert operations. Hence the | |
54 | * test_and_clear_bit(XFS_EFI_COMMITTED) to ensure only the last caller frees | |
55 | * the EFI. | |
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 | ||
63 | if (!test_and_clear_bit(XFS_EFI_COMMITTED, &efip->efi_flags)) { | |
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 | */ | |
1da177e4 | 77 | STATIC uint |
7bfa31d8 CH |
78 | xfs_efi_item_size( |
79 | struct xfs_log_item *lip) | |
1da177e4 LT |
80 | { |
81 | return 1; | |
82 | } | |
83 | ||
84 | /* | |
85 | * This is called to fill in the vector of log iovecs for the | |
86 | * given efi log item. We use only 1 iovec, and we point that | |
87 | * at the efi_log_format structure embedded in the efi item. | |
88 | * It is at this point that we assert that all of the extent | |
89 | * slots in the efi item have been filled. | |
90 | */ | |
91 | STATIC void | |
7bfa31d8 CH |
92 | xfs_efi_item_format( |
93 | struct xfs_log_item *lip, | |
94 | struct xfs_log_iovec *log_vector) | |
1da177e4 | 95 | { |
7bfa31d8 CH |
96 | struct xfs_efi_log_item *efip = EFI_ITEM(lip); |
97 | uint size; | |
1da177e4 | 98 | |
b199c8a4 DC |
99 | ASSERT(atomic_read(&efip->efi_next_extent) == |
100 | efip->efi_format.efi_nextents); | |
1da177e4 LT |
101 | |
102 | efip->efi_format.efi_type = XFS_LI_EFI; | |
103 | ||
104 | size = sizeof(xfs_efi_log_format_t); | |
105 | size += (efip->efi_format.efi_nextents - 1) * sizeof(xfs_extent_t); | |
106 | efip->efi_format.efi_size = 1; | |
107 | ||
4e0d5f92 | 108 | log_vector->i_addr = &efip->efi_format; |
1da177e4 | 109 | log_vector->i_len = size; |
4139b3b3 | 110 | log_vector->i_type = XLOG_REG_TYPE_EFI_FORMAT; |
1da177e4 LT |
111 | ASSERT(size >= sizeof(xfs_efi_log_format_t)); |
112 | } | |
113 | ||
114 | ||
115 | /* | |
116 | * Pinning has no meaning for an efi item, so just return. | |
117 | */ | |
1da177e4 | 118 | STATIC void |
7bfa31d8 CH |
119 | xfs_efi_item_pin( |
120 | struct xfs_log_item *lip) | |
1da177e4 | 121 | { |
1da177e4 LT |
122 | } |
123 | ||
1da177e4 | 124 | /* |
9c5f8414 DC |
125 | * While EFIs cannot really be pinned, the unpin operation is the last place at |
126 | * which the EFI is manipulated during a transaction. If we are being asked to | |
127 | * remove the EFI it's because the transaction has been cancelled and by | |
128 | * definition that means the EFI cannot be in the AIL so remove it from the | |
b199c8a4 DC |
129 | * transaction and free it. Otherwise coordinate with xfs_efi_release() (via |
130 | * XFS_EFI_COMMITTED) to determine who gets to free the EFI. | |
1da177e4 | 131 | */ |
1da177e4 | 132 | STATIC void |
7bfa31d8 CH |
133 | xfs_efi_item_unpin( |
134 | struct xfs_log_item *lip, | |
135 | int remove) | |
1da177e4 | 136 | { |
7bfa31d8 | 137 | struct xfs_efi_log_item *efip = EFI_ITEM(lip); |
1da177e4 | 138 | |
9c5f8414 DC |
139 | if (remove) { |
140 | ASSERT(!(lip->li_flags & XFS_LI_IN_AIL)); | |
e34a314c DC |
141 | if (lip->li_desc) |
142 | xfs_trans_del_item(lip); | |
7d795ca3 | 143 | xfs_efi_item_free(efip); |
b199c8a4 | 144 | return; |
1da177e4 | 145 | } |
b199c8a4 | 146 | __xfs_efi_release(efip); |
1da177e4 LT |
147 | } |
148 | ||
149 | /* | |
43ff2122 CH |
150 | * Efi items have no locking or pushing. However, since EFIs are pulled from |
151 | * the AIL when their corresponding EFDs are committed to disk, their situation | |
152 | * is very similar to being pinned. Return XFS_ITEM_PINNED so that the caller | |
153 | * will eventually flush the log. This should help in getting the EFI out of | |
154 | * the AIL. | |
1da177e4 | 155 | */ |
1da177e4 | 156 | STATIC uint |
43ff2122 CH |
157 | xfs_efi_item_push( |
158 | struct xfs_log_item *lip, | |
159 | struct list_head *buffer_list) | |
1da177e4 LT |
160 | { |
161 | return XFS_ITEM_PINNED; | |
162 | } | |
163 | ||
1da177e4 | 164 | STATIC void |
7bfa31d8 CH |
165 | xfs_efi_item_unlock( |
166 | struct xfs_log_item *lip) | |
1da177e4 | 167 | { |
7bfa31d8 CH |
168 | if (lip->li_flags & XFS_LI_ABORTED) |
169 | xfs_efi_item_free(EFI_ITEM(lip)); | |
1da177e4 LT |
170 | } |
171 | ||
172 | /* | |
b199c8a4 DC |
173 | * The EFI is logged only once and cannot be moved in the log, so simply return |
174 | * the lsn at which it's been logged. For bulk transaction committed | |
175 | * processing, the EFI may be processed but not yet unpinned prior to the EFD | |
176 | * being processed. Set the XFS_EFI_COMMITTED flag so this case can be detected | |
177 | * when processing the EFD. | |
1da177e4 | 178 | */ |
1da177e4 | 179 | STATIC xfs_lsn_t |
7bfa31d8 CH |
180 | xfs_efi_item_committed( |
181 | struct xfs_log_item *lip, | |
182 | xfs_lsn_t lsn) | |
1da177e4 | 183 | { |
b199c8a4 DC |
184 | struct xfs_efi_log_item *efip = EFI_ITEM(lip); |
185 | ||
186 | set_bit(XFS_EFI_COMMITTED, &efip->efi_flags); | |
1da177e4 LT |
187 | return lsn; |
188 | } | |
189 | ||
1da177e4 LT |
190 | /* |
191 | * The EFI dependency tracking op doesn't do squat. It can't because | |
192 | * it doesn't know where the free extent is coming from. The dependency | |
193 | * tracking has to be handled by the "enclosing" metadata object. For | |
194 | * example, for inodes, the inode is locked throughout the extent freeing | |
195 | * so the dependency should be recorded there. | |
196 | */ | |
1da177e4 | 197 | STATIC void |
7bfa31d8 CH |
198 | xfs_efi_item_committing( |
199 | struct xfs_log_item *lip, | |
200 | xfs_lsn_t lsn) | |
1da177e4 | 201 | { |
1da177e4 LT |
202 | } |
203 | ||
204 | /* | |
205 | * This is the ops vector shared by all efi log items. | |
206 | */ | |
272e42b2 | 207 | static const struct xfs_item_ops xfs_efi_item_ops = { |
7bfa31d8 CH |
208 | .iop_size = xfs_efi_item_size, |
209 | .iop_format = xfs_efi_item_format, | |
210 | .iop_pin = xfs_efi_item_pin, | |
211 | .iop_unpin = xfs_efi_item_unpin, | |
7bfa31d8 CH |
212 | .iop_unlock = xfs_efi_item_unlock, |
213 | .iop_committed = xfs_efi_item_committed, | |
214 | .iop_push = xfs_efi_item_push, | |
215 | .iop_committing = xfs_efi_item_committing | |
1da177e4 LT |
216 | }; |
217 | ||
218 | ||
219 | /* | |
220 | * Allocate and initialize an efi item with the given number of extents. | |
221 | */ | |
7bfa31d8 CH |
222 | struct xfs_efi_log_item * |
223 | xfs_efi_init( | |
224 | struct xfs_mount *mp, | |
225 | uint nextents) | |
1da177e4 LT |
226 | |
227 | { | |
7bfa31d8 | 228 | struct xfs_efi_log_item *efip; |
1da177e4 LT |
229 | uint size; |
230 | ||
231 | ASSERT(nextents > 0); | |
232 | if (nextents > XFS_EFI_MAX_FAST_EXTENTS) { | |
233 | size = (uint)(sizeof(xfs_efi_log_item_t) + | |
234 | ((nextents - 1) * sizeof(xfs_extent_t))); | |
7bfa31d8 | 235 | efip = kmem_zalloc(size, KM_SLEEP); |
1da177e4 | 236 | } else { |
7bfa31d8 | 237 | efip = kmem_zone_zalloc(xfs_efi_zone, KM_SLEEP); |
1da177e4 LT |
238 | } |
239 | ||
43f5efc5 | 240 | xfs_log_item_init(mp, &efip->efi_item, XFS_LI_EFI, &xfs_efi_item_ops); |
1da177e4 LT |
241 | efip->efi_format.efi_nextents = nextents; |
242 | efip->efi_format.efi_id = (__psint_t)(void*)efip; | |
b199c8a4 | 243 | atomic_set(&efip->efi_next_extent, 0); |
1da177e4 | 244 | |
7bfa31d8 | 245 | return efip; |
1da177e4 LT |
246 | } |
247 | ||
6d192a9b TS |
248 | /* |
249 | * Copy an EFI format buffer from the given buf, and into the destination | |
250 | * EFI format structure. | |
251 | * The given buffer can be in 32 bit or 64 bit form (which has different padding), | |
252 | * one of which will be the native format for this kernel. | |
253 | * It will handle the conversion of formats if necessary. | |
254 | */ | |
255 | int | |
256 | xfs_efi_copy_format(xfs_log_iovec_t *buf, xfs_efi_log_format_t *dst_efi_fmt) | |
257 | { | |
4e0d5f92 | 258 | xfs_efi_log_format_t *src_efi_fmt = buf->i_addr; |
6d192a9b TS |
259 | uint i; |
260 | uint len = sizeof(xfs_efi_log_format_t) + | |
261 | (src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_t); | |
262 | uint len32 = sizeof(xfs_efi_log_format_32_t) + | |
263 | (src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_32_t); | |
264 | uint len64 = sizeof(xfs_efi_log_format_64_t) + | |
265 | (src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_64_t); | |
266 | ||
267 | if (buf->i_len == len) { | |
268 | memcpy((char *)dst_efi_fmt, (char*)src_efi_fmt, len); | |
269 | return 0; | |
270 | } else if (buf->i_len == len32) { | |
4e0d5f92 | 271 | xfs_efi_log_format_32_t *src_efi_fmt_32 = buf->i_addr; |
6d192a9b TS |
272 | |
273 | dst_efi_fmt->efi_type = src_efi_fmt_32->efi_type; | |
274 | dst_efi_fmt->efi_size = src_efi_fmt_32->efi_size; | |
275 | dst_efi_fmt->efi_nextents = src_efi_fmt_32->efi_nextents; | |
276 | dst_efi_fmt->efi_id = src_efi_fmt_32->efi_id; | |
277 | for (i = 0; i < dst_efi_fmt->efi_nextents; i++) { | |
278 | dst_efi_fmt->efi_extents[i].ext_start = | |
279 | src_efi_fmt_32->efi_extents[i].ext_start; | |
280 | dst_efi_fmt->efi_extents[i].ext_len = | |
281 | src_efi_fmt_32->efi_extents[i].ext_len; | |
282 | } | |
283 | return 0; | |
284 | } else if (buf->i_len == len64) { | |
4e0d5f92 | 285 | xfs_efi_log_format_64_t *src_efi_fmt_64 = buf->i_addr; |
6d192a9b TS |
286 | |
287 | dst_efi_fmt->efi_type = src_efi_fmt_64->efi_type; | |
288 | dst_efi_fmt->efi_size = src_efi_fmt_64->efi_size; | |
289 | dst_efi_fmt->efi_nextents = src_efi_fmt_64->efi_nextents; | |
290 | dst_efi_fmt->efi_id = src_efi_fmt_64->efi_id; | |
291 | for (i = 0; i < dst_efi_fmt->efi_nextents; i++) { | |
292 | dst_efi_fmt->efi_extents[i].ext_start = | |
293 | src_efi_fmt_64->efi_extents[i].ext_start; | |
294 | dst_efi_fmt->efi_extents[i].ext_len = | |
295 | src_efi_fmt_64->efi_extents[i].ext_len; | |
296 | } | |
297 | return 0; | |
298 | } | |
299 | return EFSCORRUPTED; | |
300 | } | |
301 | ||
1da177e4 | 302 | /* |
b199c8a4 DC |
303 | * This is called by the efd item code below to release references to the given |
304 | * efi item. Each efd calls this with the number of extents that it has | |
305 | * logged, and when the sum of these reaches the total number of extents logged | |
306 | * by this efi item we can free the efi item. | |
1da177e4 LT |
307 | */ |
308 | void | |
309 | xfs_efi_release(xfs_efi_log_item_t *efip, | |
310 | uint nextents) | |
311 | { | |
b199c8a4 DC |
312 | ASSERT(atomic_read(&efip->efi_next_extent) >= nextents); |
313 | if (atomic_sub_and_test(nextents, &efip->efi_next_extent)) | |
314 | __xfs_efi_release(efip); | |
1da177e4 LT |
315 | } |
316 | ||
7bfa31d8 | 317 | static inline struct xfs_efd_log_item *EFD_ITEM(struct xfs_log_item *lip) |
7d795ca3 | 318 | { |
7bfa31d8 CH |
319 | return container_of(lip, struct xfs_efd_log_item, efd_item); |
320 | } | |
1da177e4 | 321 | |
7bfa31d8 CH |
322 | STATIC void |
323 | xfs_efd_item_free(struct xfs_efd_log_item *efdp) | |
324 | { | |
325 | if (efdp->efd_format.efd_nextents > XFS_EFD_MAX_FAST_EXTENTS) | |
f0e2d93c | 326 | kmem_free(efdp); |
7bfa31d8 | 327 | else |
7d795ca3 | 328 | kmem_zone_free(xfs_efd_zone, efdp); |
7d795ca3 | 329 | } |
1da177e4 LT |
330 | |
331 | /* | |
332 | * This returns the number of iovecs needed to log the given efd item. | |
333 | * We only need 1 iovec for an efd item. It just logs the efd_log_format | |
334 | * structure. | |
335 | */ | |
1da177e4 | 336 | STATIC uint |
7bfa31d8 CH |
337 | xfs_efd_item_size( |
338 | struct xfs_log_item *lip) | |
1da177e4 LT |
339 | { |
340 | return 1; | |
341 | } | |
342 | ||
343 | /* | |
344 | * This is called to fill in the vector of log iovecs for the | |
345 | * given efd log item. We use only 1 iovec, and we point that | |
346 | * at the efd_log_format structure embedded in the efd item. | |
347 | * It is at this point that we assert that all of the extent | |
348 | * slots in the efd item have been filled. | |
349 | */ | |
350 | STATIC void | |
7bfa31d8 CH |
351 | xfs_efd_item_format( |
352 | struct xfs_log_item *lip, | |
353 | struct xfs_log_iovec *log_vector) | |
1da177e4 | 354 | { |
7bfa31d8 CH |
355 | struct xfs_efd_log_item *efdp = EFD_ITEM(lip); |
356 | uint size; | |
1da177e4 LT |
357 | |
358 | ASSERT(efdp->efd_next_extent == efdp->efd_format.efd_nextents); | |
359 | ||
360 | efdp->efd_format.efd_type = XFS_LI_EFD; | |
361 | ||
362 | size = sizeof(xfs_efd_log_format_t); | |
363 | size += (efdp->efd_format.efd_nextents - 1) * sizeof(xfs_extent_t); | |
364 | efdp->efd_format.efd_size = 1; | |
365 | ||
4e0d5f92 | 366 | log_vector->i_addr = &efdp->efd_format; |
1da177e4 | 367 | log_vector->i_len = size; |
4139b3b3 | 368 | log_vector->i_type = XLOG_REG_TYPE_EFD_FORMAT; |
1da177e4 LT |
369 | ASSERT(size >= sizeof(xfs_efd_log_format_t)); |
370 | } | |
371 | ||
1da177e4 LT |
372 | /* |
373 | * Pinning has no meaning for an efd item, so just return. | |
374 | */ | |
1da177e4 | 375 | STATIC void |
7bfa31d8 CH |
376 | xfs_efd_item_pin( |
377 | struct xfs_log_item *lip) | |
1da177e4 | 378 | { |
1da177e4 LT |
379 | } |
380 | ||
1da177e4 LT |
381 | /* |
382 | * Since pinning has no meaning for an efd item, unpinning does | |
383 | * not either. | |
384 | */ | |
1da177e4 | 385 | STATIC void |
7bfa31d8 CH |
386 | xfs_efd_item_unpin( |
387 | struct xfs_log_item *lip, | |
388 | int remove) | |
1da177e4 | 389 | { |
1da177e4 LT |
390 | } |
391 | ||
392 | /* | |
43ff2122 CH |
393 | * There isn't much you can do to push on an efd item. It is simply stuck |
394 | * waiting for the log to be flushed to disk. | |
1da177e4 | 395 | */ |
1da177e4 | 396 | STATIC uint |
43ff2122 CH |
397 | xfs_efd_item_push( |
398 | struct xfs_log_item *lip, | |
399 | struct list_head *buffer_list) | |
1da177e4 | 400 | { |
43ff2122 | 401 | return XFS_ITEM_PINNED; |
1da177e4 LT |
402 | } |
403 | ||
1da177e4 | 404 | STATIC void |
7bfa31d8 CH |
405 | xfs_efd_item_unlock( |
406 | struct xfs_log_item *lip) | |
1da177e4 | 407 | { |
7bfa31d8 CH |
408 | if (lip->li_flags & XFS_LI_ABORTED) |
409 | xfs_efd_item_free(EFD_ITEM(lip)); | |
1da177e4 LT |
410 | } |
411 | ||
412 | /* | |
413 | * When the efd item is committed to disk, all we need to do | |
414 | * is delete our reference to our partner efi item and then | |
415 | * free ourselves. Since we're freeing ourselves we must | |
416 | * return -1 to keep the transaction code from further referencing | |
417 | * this item. | |
418 | */ | |
1da177e4 | 419 | STATIC xfs_lsn_t |
7bfa31d8 CH |
420 | xfs_efd_item_committed( |
421 | struct xfs_log_item *lip, | |
422 | xfs_lsn_t lsn) | |
1da177e4 | 423 | { |
7bfa31d8 CH |
424 | struct xfs_efd_log_item *efdp = EFD_ITEM(lip); |
425 | ||
1da177e4 LT |
426 | /* |
427 | * If we got a log I/O error, it's always the case that the LR with the | |
428 | * EFI got unpinned and freed before the EFD got aborted. | |
429 | */ | |
7bfa31d8 | 430 | if (!(lip->li_flags & XFS_LI_ABORTED)) |
1da177e4 LT |
431 | xfs_efi_release(efdp->efd_efip, efdp->efd_format.efd_nextents); |
432 | ||
7d795ca3 | 433 | xfs_efd_item_free(efdp); |
1da177e4 LT |
434 | return (xfs_lsn_t)-1; |
435 | } | |
436 | ||
1da177e4 LT |
437 | /* |
438 | * The EFD dependency tracking op doesn't do squat. It can't because | |
439 | * it doesn't know where the free extent is coming from. The dependency | |
440 | * tracking has to be handled by the "enclosing" metadata object. For | |
441 | * example, for inodes, the inode is locked throughout the extent freeing | |
442 | * so the dependency should be recorded there. | |
443 | */ | |
1da177e4 | 444 | STATIC void |
7bfa31d8 CH |
445 | xfs_efd_item_committing( |
446 | struct xfs_log_item *lip, | |
447 | xfs_lsn_t lsn) | |
1da177e4 | 448 | { |
1da177e4 LT |
449 | } |
450 | ||
451 | /* | |
452 | * This is the ops vector shared by all efd log items. | |
453 | */ | |
272e42b2 | 454 | static const struct xfs_item_ops xfs_efd_item_ops = { |
7bfa31d8 CH |
455 | .iop_size = xfs_efd_item_size, |
456 | .iop_format = xfs_efd_item_format, | |
457 | .iop_pin = xfs_efd_item_pin, | |
458 | .iop_unpin = xfs_efd_item_unpin, | |
7bfa31d8 CH |
459 | .iop_unlock = xfs_efd_item_unlock, |
460 | .iop_committed = xfs_efd_item_committed, | |
461 | .iop_push = xfs_efd_item_push, | |
462 | .iop_committing = xfs_efd_item_committing | |
1da177e4 LT |
463 | }; |
464 | ||
1da177e4 LT |
465 | /* |
466 | * Allocate and initialize an efd item with the given number of extents. | |
467 | */ | |
7bfa31d8 CH |
468 | struct xfs_efd_log_item * |
469 | xfs_efd_init( | |
470 | struct xfs_mount *mp, | |
471 | struct xfs_efi_log_item *efip, | |
472 | uint nextents) | |
1da177e4 LT |
473 | |
474 | { | |
7bfa31d8 | 475 | struct xfs_efd_log_item *efdp; |
1da177e4 LT |
476 | uint size; |
477 | ||
478 | ASSERT(nextents > 0); | |
479 | if (nextents > XFS_EFD_MAX_FAST_EXTENTS) { | |
480 | size = (uint)(sizeof(xfs_efd_log_item_t) + | |
481 | ((nextents - 1) * sizeof(xfs_extent_t))); | |
7bfa31d8 | 482 | efdp = kmem_zalloc(size, KM_SLEEP); |
1da177e4 | 483 | } else { |
7bfa31d8 | 484 | efdp = kmem_zone_zalloc(xfs_efd_zone, KM_SLEEP); |
1da177e4 LT |
485 | } |
486 | ||
43f5efc5 | 487 | xfs_log_item_init(mp, &efdp->efd_item, XFS_LI_EFD, &xfs_efd_item_ops); |
1da177e4 LT |
488 | efdp->efd_efip = efip; |
489 | efdp->efd_format.efd_nextents = nextents; | |
490 | efdp->efd_format.efd_efi_id = efip->efi_format.efi_id; | |
491 | ||
7bfa31d8 | 492 | return efdp; |
1da177e4 | 493 | } |