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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" |
4fb6e8ad | 20 | #include "xfs_format.h" |
239880ef DC |
21 | #include "xfs_log_format.h" |
22 | #include "xfs_trans_resv.h" | |
dc42375d | 23 | #include "xfs_bit.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 | { |
b1c5ebb2 | 44 | kmem_free(efip->efi_item.li_lv_shadow); |
7bfa31d8 | 45 | if (efip->efi_format.efi_nextents > XFS_EFI_MAX_FAST_EXTENTS) |
f0e2d93c | 46 | kmem_free(efip); |
7bfa31d8 | 47 | else |
7d795ca3 | 48 | kmem_zone_free(xfs_efi_zone, efip); |
7d795ca3 | 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 | */ | |
166d1368 DC |
56 | static inline int |
57 | xfs_efi_item_sizeof( | |
58 | struct xfs_efi_log_item *efip) | |
59 | { | |
60 | return sizeof(struct xfs_efi_log_format) + | |
61 | (efip->efi_format.efi_nextents - 1) * sizeof(xfs_extent_t); | |
62 | } | |
63 | ||
64 | STATIC void | |
7bfa31d8 | 65 | xfs_efi_item_size( |
166d1368 DC |
66 | struct xfs_log_item *lip, |
67 | int *nvecs, | |
68 | int *nbytes) | |
1da177e4 | 69 | { |
166d1368 DC |
70 | *nvecs += 1; |
71 | *nbytes += xfs_efi_item_sizeof(EFI_ITEM(lip)); | |
1da177e4 LT |
72 | } |
73 | ||
74 | /* | |
75 | * This is called to fill in the vector of log iovecs for the | |
76 | * given efi log item. We use only 1 iovec, and we point that | |
77 | * at the efi_log_format structure embedded in the efi item. | |
78 | * It is at this point that we assert that all of the extent | |
79 | * slots in the efi item have been filled. | |
80 | */ | |
81 | STATIC void | |
7bfa31d8 CH |
82 | xfs_efi_item_format( |
83 | struct xfs_log_item *lip, | |
bde7cff6 | 84 | struct xfs_log_vec *lv) |
1da177e4 | 85 | { |
7bfa31d8 | 86 | struct xfs_efi_log_item *efip = EFI_ITEM(lip); |
bde7cff6 | 87 | struct xfs_log_iovec *vecp = NULL; |
1da177e4 | 88 | |
b199c8a4 DC |
89 | ASSERT(atomic_read(&efip->efi_next_extent) == |
90 | efip->efi_format.efi_nextents); | |
1da177e4 LT |
91 | |
92 | efip->efi_format.efi_type = XFS_LI_EFI; | |
1da177e4 LT |
93 | efip->efi_format.efi_size = 1; |
94 | ||
bde7cff6 | 95 | xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_EFI_FORMAT, |
1234351c CH |
96 | &efip->efi_format, |
97 | xfs_efi_item_sizeof(efip)); | |
1da177e4 LT |
98 | } |
99 | ||
100 | ||
101 | /* | |
102 | * Pinning has no meaning for an efi item, so just return. | |
103 | */ | |
1da177e4 | 104 | STATIC void |
7bfa31d8 CH |
105 | xfs_efi_item_pin( |
106 | struct xfs_log_item *lip) | |
1da177e4 | 107 | { |
1da177e4 LT |
108 | } |
109 | ||
1da177e4 | 110 | /* |
8d99fe92 BF |
111 | * The unpin operation is the last place an EFI is manipulated in the log. It is |
112 | * either inserted in the AIL or aborted in the event of a log I/O error. In | |
113 | * either case, the EFI transaction has been successfully committed to make it | |
114 | * this far. Therefore, we expect whoever committed the EFI to either construct | |
115 | * and commit the EFD or drop the EFD's reference in the event of error. Simply | |
116 | * drop the log's EFI reference now that the log is done with it. | |
1da177e4 | 117 | */ |
1da177e4 | 118 | STATIC void |
7bfa31d8 CH |
119 | xfs_efi_item_unpin( |
120 | struct xfs_log_item *lip, | |
121 | int remove) | |
1da177e4 | 122 | { |
7bfa31d8 | 123 | struct xfs_efi_log_item *efip = EFI_ITEM(lip); |
5e4b5386 | 124 | xfs_efi_release(efip); |
1da177e4 LT |
125 | } |
126 | ||
127 | /* | |
43ff2122 CH |
128 | * Efi items have no locking or pushing. However, since EFIs are pulled from |
129 | * the AIL when their corresponding EFDs are committed to disk, their situation | |
130 | * is very similar to being pinned. Return XFS_ITEM_PINNED so that the caller | |
131 | * will eventually flush the log. This should help in getting the EFI out of | |
132 | * the AIL. | |
1da177e4 | 133 | */ |
1da177e4 | 134 | STATIC uint |
43ff2122 CH |
135 | xfs_efi_item_push( |
136 | struct xfs_log_item *lip, | |
137 | struct list_head *buffer_list) | |
1da177e4 LT |
138 | { |
139 | return XFS_ITEM_PINNED; | |
140 | } | |
141 | ||
8d99fe92 BF |
142 | /* |
143 | * The EFI has been either committed or aborted if the transaction has been | |
144 | * cancelled. If the transaction was cancelled, an EFD isn't going to be | |
145 | * constructed and thus we free the EFI here directly. | |
146 | */ | |
1da177e4 | 147 | STATIC void |
7bfa31d8 CH |
148 | xfs_efi_item_unlock( |
149 | struct xfs_log_item *lip) | |
1da177e4 | 150 | { |
7bfa31d8 CH |
151 | if (lip->li_flags & XFS_LI_ABORTED) |
152 | xfs_efi_item_free(EFI_ITEM(lip)); | |
1da177e4 LT |
153 | } |
154 | ||
155 | /* | |
b199c8a4 | 156 | * The EFI is logged only once and cannot be moved in the log, so simply return |
666d644c | 157 | * the lsn at which it's been logged. |
1da177e4 | 158 | */ |
1da177e4 | 159 | STATIC xfs_lsn_t |
7bfa31d8 CH |
160 | xfs_efi_item_committed( |
161 | struct xfs_log_item *lip, | |
162 | xfs_lsn_t lsn) | |
1da177e4 LT |
163 | { |
164 | return lsn; | |
165 | } | |
166 | ||
1da177e4 LT |
167 | /* |
168 | * The EFI dependency tracking op doesn't do squat. It can't because | |
169 | * it doesn't know where the free extent is coming from. The dependency | |
170 | * tracking has to be handled by the "enclosing" metadata object. For | |
171 | * example, for inodes, the inode is locked throughout the extent freeing | |
172 | * so the dependency should be recorded there. | |
173 | */ | |
1da177e4 | 174 | STATIC void |
7bfa31d8 CH |
175 | xfs_efi_item_committing( |
176 | struct xfs_log_item *lip, | |
177 | xfs_lsn_t lsn) | |
1da177e4 | 178 | { |
1da177e4 LT |
179 | } |
180 | ||
181 | /* | |
182 | * This is the ops vector shared by all efi log items. | |
183 | */ | |
272e42b2 | 184 | static const struct xfs_item_ops xfs_efi_item_ops = { |
7bfa31d8 CH |
185 | .iop_size = xfs_efi_item_size, |
186 | .iop_format = xfs_efi_item_format, | |
187 | .iop_pin = xfs_efi_item_pin, | |
188 | .iop_unpin = xfs_efi_item_unpin, | |
7bfa31d8 CH |
189 | .iop_unlock = xfs_efi_item_unlock, |
190 | .iop_committed = xfs_efi_item_committed, | |
191 | .iop_push = xfs_efi_item_push, | |
192 | .iop_committing = xfs_efi_item_committing | |
1da177e4 LT |
193 | }; |
194 | ||
195 | ||
196 | /* | |
197 | * Allocate and initialize an efi item with the given number of extents. | |
198 | */ | |
7bfa31d8 CH |
199 | struct xfs_efi_log_item * |
200 | xfs_efi_init( | |
201 | struct xfs_mount *mp, | |
202 | uint nextents) | |
1da177e4 LT |
203 | |
204 | { | |
7bfa31d8 | 205 | struct xfs_efi_log_item *efip; |
1da177e4 LT |
206 | uint size; |
207 | ||
208 | ASSERT(nextents > 0); | |
209 | if (nextents > XFS_EFI_MAX_FAST_EXTENTS) { | |
210 | size = (uint)(sizeof(xfs_efi_log_item_t) + | |
211 | ((nextents - 1) * sizeof(xfs_extent_t))); | |
7bfa31d8 | 212 | efip = kmem_zalloc(size, KM_SLEEP); |
1da177e4 | 213 | } else { |
7bfa31d8 | 214 | efip = kmem_zone_zalloc(xfs_efi_zone, KM_SLEEP); |
1da177e4 LT |
215 | } |
216 | ||
43f5efc5 | 217 | xfs_log_item_init(mp, &efip->efi_item, XFS_LI_EFI, &xfs_efi_item_ops); |
1da177e4 | 218 | efip->efi_format.efi_nextents = nextents; |
db9d67d6 | 219 | efip->efi_format.efi_id = (uintptr_t)(void *)efip; |
b199c8a4 | 220 | atomic_set(&efip->efi_next_extent, 0); |
666d644c | 221 | atomic_set(&efip->efi_refcount, 2); |
1da177e4 | 222 | |
7bfa31d8 | 223 | return efip; |
1da177e4 LT |
224 | } |
225 | ||
6d192a9b TS |
226 | /* |
227 | * Copy an EFI format buffer from the given buf, and into the destination | |
228 | * EFI format structure. | |
229 | * The given buffer can be in 32 bit or 64 bit form (which has different padding), | |
230 | * one of which will be the native format for this kernel. | |
231 | * It will handle the conversion of formats if necessary. | |
232 | */ | |
233 | int | |
234 | xfs_efi_copy_format(xfs_log_iovec_t *buf, xfs_efi_log_format_t *dst_efi_fmt) | |
235 | { | |
4e0d5f92 | 236 | xfs_efi_log_format_t *src_efi_fmt = buf->i_addr; |
6d192a9b TS |
237 | uint i; |
238 | uint len = sizeof(xfs_efi_log_format_t) + | |
239 | (src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_t); | |
240 | uint len32 = sizeof(xfs_efi_log_format_32_t) + | |
241 | (src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_32_t); | |
242 | uint len64 = sizeof(xfs_efi_log_format_64_t) + | |
243 | (src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_64_t); | |
244 | ||
245 | if (buf->i_len == len) { | |
246 | memcpy((char *)dst_efi_fmt, (char*)src_efi_fmt, len); | |
247 | return 0; | |
248 | } else if (buf->i_len == len32) { | |
4e0d5f92 | 249 | xfs_efi_log_format_32_t *src_efi_fmt_32 = buf->i_addr; |
6d192a9b TS |
250 | |
251 | dst_efi_fmt->efi_type = src_efi_fmt_32->efi_type; | |
252 | dst_efi_fmt->efi_size = src_efi_fmt_32->efi_size; | |
253 | dst_efi_fmt->efi_nextents = src_efi_fmt_32->efi_nextents; | |
254 | dst_efi_fmt->efi_id = src_efi_fmt_32->efi_id; | |
255 | for (i = 0; i < dst_efi_fmt->efi_nextents; i++) { | |
256 | dst_efi_fmt->efi_extents[i].ext_start = | |
257 | src_efi_fmt_32->efi_extents[i].ext_start; | |
258 | dst_efi_fmt->efi_extents[i].ext_len = | |
259 | src_efi_fmt_32->efi_extents[i].ext_len; | |
260 | } | |
261 | return 0; | |
262 | } else if (buf->i_len == len64) { | |
4e0d5f92 | 263 | xfs_efi_log_format_64_t *src_efi_fmt_64 = buf->i_addr; |
6d192a9b TS |
264 | |
265 | dst_efi_fmt->efi_type = src_efi_fmt_64->efi_type; | |
266 | dst_efi_fmt->efi_size = src_efi_fmt_64->efi_size; | |
267 | dst_efi_fmt->efi_nextents = src_efi_fmt_64->efi_nextents; | |
268 | dst_efi_fmt->efi_id = src_efi_fmt_64->efi_id; | |
269 | for (i = 0; i < dst_efi_fmt->efi_nextents; i++) { | |
270 | dst_efi_fmt->efi_extents[i].ext_start = | |
271 | src_efi_fmt_64->efi_extents[i].ext_start; | |
272 | dst_efi_fmt->efi_extents[i].ext_len = | |
273 | src_efi_fmt_64->efi_extents[i].ext_len; | |
274 | } | |
275 | return 0; | |
276 | } | |
2451337d | 277 | return -EFSCORRUPTED; |
6d192a9b TS |
278 | } |
279 | ||
1da177e4 | 280 | /* |
e32a1d1f BF |
281 | * Freeing the efi requires that we remove it from the AIL if it has already |
282 | * been placed there. However, the EFI may not yet have been placed in the AIL | |
283 | * when called by xfs_efi_release() from EFD processing due to the ordering of | |
284 | * committed vs unpin operations in bulk insert operations. Hence the reference | |
285 | * count to ensure only the last caller frees the EFI. | |
1da177e4 LT |
286 | */ |
287 | void | |
5e4b5386 BF |
288 | xfs_efi_release( |
289 | struct xfs_efi_log_item *efip) | |
1da177e4 | 290 | { |
e32a1d1f | 291 | if (atomic_dec_and_test(&efip->efi_refcount)) { |
146e54b7 | 292 | xfs_trans_ail_remove(&efip->efi_item, SHUTDOWN_LOG_IO_ERROR); |
e32a1d1f BF |
293 | xfs_efi_item_free(efip); |
294 | } | |
1da177e4 LT |
295 | } |
296 | ||
7bfa31d8 | 297 | static inline struct xfs_efd_log_item *EFD_ITEM(struct xfs_log_item *lip) |
7d795ca3 | 298 | { |
7bfa31d8 CH |
299 | return container_of(lip, struct xfs_efd_log_item, efd_item); |
300 | } | |
1da177e4 | 301 | |
7bfa31d8 CH |
302 | STATIC void |
303 | xfs_efd_item_free(struct xfs_efd_log_item *efdp) | |
304 | { | |
b1c5ebb2 | 305 | kmem_free(efdp->efd_item.li_lv_shadow); |
7bfa31d8 | 306 | if (efdp->efd_format.efd_nextents > XFS_EFD_MAX_FAST_EXTENTS) |
f0e2d93c | 307 | kmem_free(efdp); |
7bfa31d8 | 308 | else |
7d795ca3 | 309 | kmem_zone_free(xfs_efd_zone, efdp); |
7d795ca3 | 310 | } |
1da177e4 LT |
311 | |
312 | /* | |
313 | * This returns the number of iovecs needed to log the given efd item. | |
314 | * We only need 1 iovec for an efd item. It just logs the efd_log_format | |
315 | * structure. | |
316 | */ | |
166d1368 DC |
317 | static inline int |
318 | xfs_efd_item_sizeof( | |
319 | struct xfs_efd_log_item *efdp) | |
320 | { | |
321 | return sizeof(xfs_efd_log_format_t) + | |
322 | (efdp->efd_format.efd_nextents - 1) * sizeof(xfs_extent_t); | |
323 | } | |
324 | ||
325 | STATIC void | |
7bfa31d8 | 326 | xfs_efd_item_size( |
166d1368 DC |
327 | struct xfs_log_item *lip, |
328 | int *nvecs, | |
329 | int *nbytes) | |
1da177e4 | 330 | { |
166d1368 DC |
331 | *nvecs += 1; |
332 | *nbytes += xfs_efd_item_sizeof(EFD_ITEM(lip)); | |
1da177e4 LT |
333 | } |
334 | ||
335 | /* | |
336 | * This is called to fill in the vector of log iovecs for the | |
337 | * given efd log item. We use only 1 iovec, and we point that | |
338 | * at the efd_log_format structure embedded in the efd item. | |
339 | * It is at this point that we assert that all of the extent | |
340 | * slots in the efd item have been filled. | |
341 | */ | |
342 | STATIC void | |
7bfa31d8 CH |
343 | xfs_efd_item_format( |
344 | struct xfs_log_item *lip, | |
bde7cff6 | 345 | struct xfs_log_vec *lv) |
1da177e4 | 346 | { |
7bfa31d8 | 347 | struct xfs_efd_log_item *efdp = EFD_ITEM(lip); |
bde7cff6 | 348 | struct xfs_log_iovec *vecp = NULL; |
1da177e4 LT |
349 | |
350 | ASSERT(efdp->efd_next_extent == efdp->efd_format.efd_nextents); | |
351 | ||
352 | efdp->efd_format.efd_type = XFS_LI_EFD; | |
1da177e4 LT |
353 | efdp->efd_format.efd_size = 1; |
354 | ||
bde7cff6 | 355 | xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_EFD_FORMAT, |
1234351c CH |
356 | &efdp->efd_format, |
357 | xfs_efd_item_sizeof(efdp)); | |
1da177e4 LT |
358 | } |
359 | ||
1da177e4 LT |
360 | /* |
361 | * Pinning has no meaning for an efd item, so just return. | |
362 | */ | |
1da177e4 | 363 | STATIC void |
7bfa31d8 CH |
364 | xfs_efd_item_pin( |
365 | struct xfs_log_item *lip) | |
1da177e4 | 366 | { |
1da177e4 LT |
367 | } |
368 | ||
1da177e4 LT |
369 | /* |
370 | * Since pinning has no meaning for an efd item, unpinning does | |
371 | * not either. | |
372 | */ | |
1da177e4 | 373 | STATIC void |
7bfa31d8 CH |
374 | xfs_efd_item_unpin( |
375 | struct xfs_log_item *lip, | |
376 | int remove) | |
1da177e4 | 377 | { |
1da177e4 LT |
378 | } |
379 | ||
380 | /* | |
43ff2122 CH |
381 | * There isn't much you can do to push on an efd item. It is simply stuck |
382 | * waiting for the log to be flushed to disk. | |
1da177e4 | 383 | */ |
1da177e4 | 384 | STATIC uint |
43ff2122 CH |
385 | xfs_efd_item_push( |
386 | struct xfs_log_item *lip, | |
387 | struct list_head *buffer_list) | |
1da177e4 | 388 | { |
43ff2122 | 389 | return XFS_ITEM_PINNED; |
1da177e4 LT |
390 | } |
391 | ||
8d99fe92 BF |
392 | /* |
393 | * The EFD is either committed or aborted if the transaction is cancelled. If | |
394 | * the transaction is cancelled, drop our reference to the EFI and free the EFD. | |
395 | */ | |
1da177e4 | 396 | STATIC void |
7bfa31d8 CH |
397 | xfs_efd_item_unlock( |
398 | struct xfs_log_item *lip) | |
1da177e4 | 399 | { |
8d99fe92 BF |
400 | struct xfs_efd_log_item *efdp = EFD_ITEM(lip); |
401 | ||
402 | if (lip->li_flags & XFS_LI_ABORTED) { | |
403 | xfs_efi_release(efdp->efd_efip); | |
404 | xfs_efd_item_free(efdp); | |
405 | } | |
1da177e4 LT |
406 | } |
407 | ||
408 | /* | |
8d99fe92 BF |
409 | * When the efd item is committed to disk, all we need to do is delete our |
410 | * reference to our partner efi item and then free ourselves. Since we're | |
411 | * freeing ourselves we must return -1 to keep the transaction code from further | |
412 | * referencing this item. | |
1da177e4 | 413 | */ |
1da177e4 | 414 | STATIC xfs_lsn_t |
7bfa31d8 CH |
415 | xfs_efd_item_committed( |
416 | struct xfs_log_item *lip, | |
417 | xfs_lsn_t lsn) | |
1da177e4 | 418 | { |
7bfa31d8 CH |
419 | struct xfs_efd_log_item *efdp = EFD_ITEM(lip); |
420 | ||
1da177e4 | 421 | /* |
8d99fe92 BF |
422 | * Drop the EFI reference regardless of whether the EFD has been |
423 | * aborted. Once the EFD transaction is constructed, it is the sole | |
424 | * responsibility of the EFD to release the EFI (even if the EFI is | |
425 | * aborted due to log I/O error). | |
1da177e4 | 426 | */ |
8d99fe92 | 427 | xfs_efi_release(efdp->efd_efip); |
7d795ca3 | 428 | xfs_efd_item_free(efdp); |
8d99fe92 | 429 | |
1da177e4 LT |
430 | return (xfs_lsn_t)-1; |
431 | } | |
432 | ||
1da177e4 LT |
433 | /* |
434 | * The EFD dependency tracking op doesn't do squat. It can't because | |
435 | * it doesn't know where the free extent is coming from. The dependency | |
436 | * tracking has to be handled by the "enclosing" metadata object. For | |
437 | * example, for inodes, the inode is locked throughout the extent freeing | |
438 | * so the dependency should be recorded there. | |
439 | */ | |
1da177e4 | 440 | STATIC void |
7bfa31d8 CH |
441 | xfs_efd_item_committing( |
442 | struct xfs_log_item *lip, | |
443 | xfs_lsn_t lsn) | |
1da177e4 | 444 | { |
1da177e4 LT |
445 | } |
446 | ||
447 | /* | |
448 | * This is the ops vector shared by all efd log items. | |
449 | */ | |
272e42b2 | 450 | static const struct xfs_item_ops xfs_efd_item_ops = { |
7bfa31d8 CH |
451 | .iop_size = xfs_efd_item_size, |
452 | .iop_format = xfs_efd_item_format, | |
453 | .iop_pin = xfs_efd_item_pin, | |
454 | .iop_unpin = xfs_efd_item_unpin, | |
7bfa31d8 CH |
455 | .iop_unlock = xfs_efd_item_unlock, |
456 | .iop_committed = xfs_efd_item_committed, | |
457 | .iop_push = xfs_efd_item_push, | |
458 | .iop_committing = xfs_efd_item_committing | |
1da177e4 LT |
459 | }; |
460 | ||
1da177e4 LT |
461 | /* |
462 | * Allocate and initialize an efd item with the given number of extents. | |
463 | */ | |
7bfa31d8 CH |
464 | struct xfs_efd_log_item * |
465 | xfs_efd_init( | |
466 | struct xfs_mount *mp, | |
467 | struct xfs_efi_log_item *efip, | |
468 | uint nextents) | |
1da177e4 LT |
469 | |
470 | { | |
7bfa31d8 | 471 | struct xfs_efd_log_item *efdp; |
1da177e4 LT |
472 | uint size; |
473 | ||
474 | ASSERT(nextents > 0); | |
475 | if (nextents > XFS_EFD_MAX_FAST_EXTENTS) { | |
476 | size = (uint)(sizeof(xfs_efd_log_item_t) + | |
477 | ((nextents - 1) * sizeof(xfs_extent_t))); | |
7bfa31d8 | 478 | efdp = kmem_zalloc(size, KM_SLEEP); |
1da177e4 | 479 | } else { |
7bfa31d8 | 480 | efdp = kmem_zone_zalloc(xfs_efd_zone, KM_SLEEP); |
1da177e4 LT |
481 | } |
482 | ||
43f5efc5 | 483 | xfs_log_item_init(mp, &efdp->efd_item, XFS_LI_EFD, &xfs_efd_item_ops); |
1da177e4 LT |
484 | efdp->efd_efip = efip; |
485 | efdp->efd_format.efd_nextents = nextents; | |
486 | efdp->efd_format.efd_efi_id = efip->efi_format.efi_id; | |
487 | ||
7bfa31d8 | 488 | return efdp; |
1da177e4 | 489 | } |
dc42375d DW |
490 | |
491 | /* | |
492 | * Process an extent free intent item that was recovered from | |
493 | * the log. We need to free the extents that it describes. | |
494 | */ | |
495 | int | |
496 | xfs_efi_recover( | |
497 | struct xfs_mount *mp, | |
498 | struct xfs_efi_log_item *efip) | |
499 | { | |
500 | struct xfs_efd_log_item *efdp; | |
501 | struct xfs_trans *tp; | |
502 | int i; | |
503 | int error = 0; | |
504 | xfs_extent_t *extp; | |
505 | xfs_fsblock_t startblock_fsb; | |
506 | ||
507 | ASSERT(!test_bit(XFS_EFI_RECOVERED, &efip->efi_flags)); | |
508 | ||
509 | /* | |
510 | * First check the validity of the extents described by the | |
511 | * EFI. If any are bad, then assume that all are bad and | |
512 | * just toss the EFI. | |
513 | */ | |
514 | for (i = 0; i < efip->efi_format.efi_nextents; i++) { | |
515 | extp = &(efip->efi_format.efi_extents[i]); | |
516 | startblock_fsb = XFS_BB_TO_FSB(mp, | |
517 | XFS_FSB_TO_DADDR(mp, extp->ext_start)); | |
518 | if ((startblock_fsb == 0) || | |
519 | (extp->ext_len == 0) || | |
520 | (startblock_fsb >= mp->m_sb.sb_dblocks) || | |
521 | (extp->ext_len >= mp->m_sb.sb_agblocks)) { | |
522 | /* | |
523 | * This will pull the EFI from the AIL and | |
524 | * free the memory associated with it. | |
525 | */ | |
526 | set_bit(XFS_EFI_RECOVERED, &efip->efi_flags); | |
527 | xfs_efi_release(efip); | |
528 | return -EIO; | |
529 | } | |
530 | } | |
531 | ||
532 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp); | |
533 | if (error) | |
534 | return error; | |
535 | efdp = xfs_trans_get_efd(tp, efip, efip->efi_format.efi_nextents); | |
536 | ||
537 | for (i = 0; i < efip->efi_format.efi_nextents; i++) { | |
538 | extp = &(efip->efi_format.efi_extents[i]); | |
539 | error = xfs_trans_free_extent(tp, efdp, extp->ext_start, | |
540 | extp->ext_len); | |
541 | if (error) | |
542 | goto abort_error; | |
543 | ||
544 | } | |
545 | ||
546 | set_bit(XFS_EFI_RECOVERED, &efip->efi_flags); | |
547 | error = xfs_trans_commit(tp); | |
548 | return error; | |
549 | ||
550 | abort_error: | |
551 | xfs_trans_cancel(tp); | |
552 | return error; | |
553 | } |