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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott7b718762005-11-02 14:58:39 +11002 * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include "xfs.h"
Nathan Scotta844f452005-11-02 14:38:42 +110019#include "xfs_fs.h"
Dave Chinner239880e2013-10-23 10:50:10 +110020#include "xfs_log_format.h"
21#include "xfs_trans_resv.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include "xfs_sb.h"
David Chinnerda353b02007-08-28 14:00:13 +100023#include "xfs_ag.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include "xfs_mount.h"
Dave Chinner239880e2013-10-23 10:50:10 +110025#include "xfs_trans.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include "xfs_trans_priv.h"
Dave Chinner239880e2013-10-23 10:50:10 +110027#include "xfs_buf_item.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include "xfs_extfree_item.h"
Christoph Hellwig12343512013-12-13 11:00:43 +110029#include "xfs_log.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070030
31
32kmem_zone_t *xfs_efi_zone;
33kmem_zone_t *xfs_efd_zone;
34
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +100035static 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}
Linus Torvalds1da177e2005-04-16 15:20:36 -070039
Christoph Hellwig7d795ca2005-06-21 15:41:19 +100040void
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +100041xfs_efi_item_free(
42 struct xfs_efi_log_item *efip)
Christoph Hellwig7d795ca2005-06-21 15:41:19 +100043{
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +100044 if (efip->efi_format.efi_nextents > XFS_EFI_MAX_FAST_EXTENTS)
Denys Vlasenkof0e2d932008-05-19 16:31:57 +100045 kmem_free(efip);
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +100046 else
Christoph Hellwig7d795ca2005-06-21 15:41:19 +100047 kmem_zone_free(xfs_efi_zone, efip);
Christoph Hellwig7d795ca2005-06-21 15:41:19 +100048}
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
50/*
Dave Chinnerb199c8a2010-12-20 11:59:49 +110051 * 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
Dave Chinner666d6442013-04-03 14:09:21 +110054 * committed vs unpin operations in bulk insert operations. Hence the reference
55 * count to ensure only the last caller frees the EFI.
Dave Chinnerb199c8a2010-12-20 11:59:49 +110056 */
57STATIC void
58__xfs_efi_release(
59 struct xfs_efi_log_item *efip)
60{
61 struct xfs_ail *ailp = efip->efi_item.li_ailp;
62
Dave Chinner666d6442013-04-03 14:09:21 +110063 if (atomic_dec_and_test(&efip->efi_refcount)) {
Dave Chinnerb199c8a2010-12-20 11:59:49 +110064 spin_lock(&ailp->xa_lock);
65 /* xfs_trans_ail_delete() drops the AIL lock. */
Dave Chinner04913fd2012-04-23 15:58:41 +100066 xfs_trans_ail_delete(ailp, &efip->efi_item,
67 SHUTDOWN_LOG_IO_ERROR);
Dave Chinnerb199c8a2010-12-20 11:59:49 +110068 xfs_efi_item_free(efip);
69 }
70}
71
72/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 * 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 */
Dave Chinner166d1362013-08-12 20:50:04 +100077static inline int
78xfs_efi_item_sizeof(
79 struct xfs_efi_log_item *efip)
Linus Torvalds1da177e2005-04-16 15:20:36 -070080{
Dave Chinner166d1362013-08-12 20:50:04 +100081 return sizeof(struct xfs_efi_log_format) +
82 (efip->efi_format.efi_nextents - 1) * sizeof(xfs_extent_t);
83}
84
85STATIC void
86xfs_efi_item_size(
87 struct xfs_log_item *lip,
88 int *nvecs,
89 int *nbytes)
90{
91 *nvecs += 1;
92 *nbytes += xfs_efi_item_sizeof(EFI_ITEM(lip));
Linus Torvalds1da177e2005-04-16 15:20:36 -070093}
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 */
102STATIC void
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000103xfs_efi_item_format(
104 struct xfs_log_item *lip,
Christoph Hellwigbde7cff2013-12-13 11:34:02 +1100105 struct xfs_log_vec *lv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106{
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000107 struct xfs_efi_log_item *efip = EFI_ITEM(lip);
Christoph Hellwigbde7cff2013-12-13 11:34:02 +1100108 struct xfs_log_iovec *vecp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109
Dave Chinnerb199c8a2010-12-20 11:59:49 +1100110 ASSERT(atomic_read(&efip->efi_next_extent) ==
111 efip->efi_format.efi_nextents);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112
113 efip->efi_format.efi_type = XFS_LI_EFI;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 efip->efi_format.efi_size = 1;
115
Christoph Hellwigbde7cff2013-12-13 11:34:02 +1100116 xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_EFI_FORMAT,
Christoph Hellwig12343512013-12-13 11:00:43 +1100117 &efip->efi_format,
118 xfs_efi_item_sizeof(efip));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119}
120
121
122/*
123 * Pinning has no meaning for an efi item, so just return.
124 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125STATIC void
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000126xfs_efi_item_pin(
127 struct xfs_log_item *lip)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129}
130
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131/*
Dave Chinner9c5f8412010-12-20 11:57:24 +1100132 * 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
Dave Chinner666d6442013-04-03 14:09:21 +1100136 * transaction and free it. Otherwise coordinate with xfs_efi_release()
137 * to determine who gets to free the EFI.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139STATIC void
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000140xfs_efi_item_unpin(
141 struct xfs_log_item *lip,
142 int remove)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143{
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000144 struct xfs_efi_log_item *efip = EFI_ITEM(lip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
Dave Chinner9c5f8412010-12-20 11:57:24 +1100146 if (remove) {
147 ASSERT(!(lip->li_flags & XFS_LI_IN_AIL));
Dave Chinnere34a3142011-01-27 12:13:35 +1100148 if (lip->li_desc)
149 xfs_trans_del_item(lip);
Christoph Hellwig7d795ca2005-06-21 15:41:19 +1000150 xfs_efi_item_free(efip);
Dave Chinnerb199c8a2010-12-20 11:59:49 +1100151 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 }
Dave Chinnerb199c8a2010-12-20 11:59:49 +1100153 __xfs_efi_release(efip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154}
155
156/*
Christoph Hellwig43ff2122012-04-23 15:58:39 +1000157 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163STATIC uint
Christoph Hellwig43ff2122012-04-23 15:58:39 +1000164xfs_efi_item_push(
165 struct xfs_log_item *lip,
166 struct list_head *buffer_list)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167{
168 return XFS_ITEM_PINNED;
169}
170
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171STATIC void
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000172xfs_efi_item_unlock(
173 struct xfs_log_item *lip)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174{
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000175 if (lip->li_flags & XFS_LI_ABORTED)
176 xfs_efi_item_free(EFI_ITEM(lip));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177}
178
179/*
Dave Chinnerb199c8a2010-12-20 11:59:49 +1100180 * The EFI is logged only once and cannot be moved in the log, so simply return
Dave Chinner666d6442013-04-03 14:09:21 +1100181 * the lsn at which it's been logged.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183STATIC xfs_lsn_t
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000184xfs_efi_item_committed(
185 struct xfs_log_item *lip,
186 xfs_lsn_t lsn)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187{
188 return lsn;
189}
190
191/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 * 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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198STATIC void
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000199xfs_efi_item_committing(
200 struct xfs_log_item *lip,
201 xfs_lsn_t lsn)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203}
204
205/*
206 * This is the ops vector shared by all efi log items.
207 */
Christoph Hellwig272e42b2011-10-28 09:54:24 +0000208static const struct xfs_item_ops xfs_efi_item_ops = {
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000209 .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,
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000213 .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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217};
218
219
220/*
221 * Allocate and initialize an efi item with the given number of extents.
222 */
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000223struct xfs_efi_log_item *
224xfs_efi_init(
225 struct xfs_mount *mp,
226 uint nextents)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
228{
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000229 struct xfs_efi_log_item *efip;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 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)));
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000236 efip = kmem_zalloc(size, KM_SLEEP);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 } else {
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000238 efip = kmem_zone_zalloc(xfs_efi_zone, KM_SLEEP);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 }
240
Dave Chinner43f5efc2010-03-23 10:10:00 +1100241 xfs_log_item_init(mp, &efip->efi_item, XFS_LI_EFI, &xfs_efi_item_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 efip->efi_format.efi_nextents = nextents;
243 efip->efi_format.efi_id = (__psint_t)(void*)efip;
Dave Chinnerb199c8a2010-12-20 11:59:49 +1100244 atomic_set(&efip->efi_next_extent, 0);
Dave Chinner666d6442013-04-03 14:09:21 +1100245 atomic_set(&efip->efi_refcount, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000247 return efip;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248}
249
250/*
Tim Shimmin6d192a92006-06-09 14:55:38 +1000251 * 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 */
257int
258xfs_efi_copy_format(xfs_log_iovec_t *buf, xfs_efi_log_format_t *dst_efi_fmt)
259{
Christoph Hellwig4e0d5f92010-06-23 18:11:15 +1000260 xfs_efi_log_format_t *src_efi_fmt = buf->i_addr;
Tim Shimmin6d192a92006-06-09 14:55:38 +1000261 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) {
Christoph Hellwig4e0d5f92010-06-23 18:11:15 +1000273 xfs_efi_log_format_32_t *src_efi_fmt_32 = buf->i_addr;
Tim Shimmin6d192a92006-06-09 14:55:38 +1000274
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) {
Christoph Hellwig4e0d5f92010-06-23 18:11:15 +1000287 xfs_efi_log_format_64_t *src_efi_fmt_64 = buf->i_addr;
Tim Shimmin6d192a92006-06-09 14:55:38 +1000288
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 }
301 return EFSCORRUPTED;
302}
303
304/*
Dave Chinnerb199c8a2010-12-20 11:59:49 +1100305 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 */
310void
311xfs_efi_release(xfs_efi_log_item_t *efip,
312 uint nextents)
313{
Dave Chinnerb199c8a2010-12-20 11:59:49 +1100314 ASSERT(atomic_read(&efip->efi_next_extent) >= nextents);
Dave Chinner666d6442013-04-03 14:09:21 +1100315 if (atomic_sub_and_test(nextents, &efip->efi_next_extent)) {
Dave Chinner666d6442013-04-03 14:09:21 +1100316 /* recovery needs us to drop the EFI reference, too */
317 if (test_bit(XFS_EFI_RECOVERED, &efip->efi_flags))
318 __xfs_efi_release(efip);
Dave Chinner509e7082013-05-20 09:51:10 +1000319
320 __xfs_efi_release(efip);
321 /* efip may now have been freed, do not reference it again. */
Dave Chinner666d6442013-04-03 14:09:21 +1100322 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323}
324
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000325static inline struct xfs_efd_log_item *EFD_ITEM(struct xfs_log_item *lip)
Christoph Hellwig7d795ca2005-06-21 15:41:19 +1000326{
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000327 return container_of(lip, struct xfs_efd_log_item, efd_item);
328}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000330STATIC void
331xfs_efd_item_free(struct xfs_efd_log_item *efdp)
332{
333 if (efdp->efd_format.efd_nextents > XFS_EFD_MAX_FAST_EXTENTS)
Denys Vlasenkof0e2d932008-05-19 16:31:57 +1000334 kmem_free(efdp);
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000335 else
Christoph Hellwig7d795ca2005-06-21 15:41:19 +1000336 kmem_zone_free(xfs_efd_zone, efdp);
Christoph Hellwig7d795ca2005-06-21 15:41:19 +1000337}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338
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 */
Dave Chinner166d1362013-08-12 20:50:04 +1000344static inline int
345xfs_efd_item_sizeof(
346 struct xfs_efd_log_item *efdp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347{
Dave Chinner166d1362013-08-12 20:50:04 +1000348 return sizeof(xfs_efd_log_format_t) +
349 (efdp->efd_format.efd_nextents - 1) * sizeof(xfs_extent_t);
350}
351
352STATIC void
353xfs_efd_item_size(
354 struct xfs_log_item *lip,
355 int *nvecs,
356 int *nbytes)
357{
358 *nvecs += 1;
359 *nbytes += xfs_efd_item_sizeof(EFD_ITEM(lip));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360}
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 */
369STATIC void
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000370xfs_efd_item_format(
371 struct xfs_log_item *lip,
Christoph Hellwigbde7cff2013-12-13 11:34:02 +1100372 struct xfs_log_vec *lv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373{
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000374 struct xfs_efd_log_item *efdp = EFD_ITEM(lip);
Christoph Hellwigbde7cff2013-12-13 11:34:02 +1100375 struct xfs_log_iovec *vecp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376
377 ASSERT(efdp->efd_next_extent == efdp->efd_format.efd_nextents);
378
379 efdp->efd_format.efd_type = XFS_LI_EFD;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 efdp->efd_format.efd_size = 1;
381
Christoph Hellwigbde7cff2013-12-13 11:34:02 +1100382 xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_EFD_FORMAT,
Christoph Hellwig12343512013-12-13 11:00:43 +1100383 &efdp->efd_format,
384 xfs_efd_item_sizeof(efdp));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385}
386
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387/*
388 * Pinning has no meaning for an efd item, so just return.
389 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390STATIC void
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000391xfs_efd_item_pin(
392 struct xfs_log_item *lip)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394}
395
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396/*
397 * Since pinning has no meaning for an efd item, unpinning does
398 * not either.
399 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400STATIC void
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000401xfs_efd_item_unpin(
402 struct xfs_log_item *lip,
403 int remove)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405}
406
407/*
Christoph Hellwig43ff2122012-04-23 15:58:39 +1000408 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411STATIC uint
Christoph Hellwig43ff2122012-04-23 15:58:39 +1000412xfs_efd_item_push(
413 struct xfs_log_item *lip,
414 struct list_head *buffer_list)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415{
Christoph Hellwig43ff2122012-04-23 15:58:39 +1000416 return XFS_ITEM_PINNED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417}
418
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419STATIC void
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000420xfs_efd_item_unlock(
421 struct xfs_log_item *lip)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422{
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000423 if (lip->li_flags & XFS_LI_ABORTED)
424 xfs_efd_item_free(EFD_ITEM(lip));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425}
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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434STATIC xfs_lsn_t
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000435xfs_efd_item_committed(
436 struct xfs_log_item *lip,
437 xfs_lsn_t lsn)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438{
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000439 struct xfs_efd_log_item *efdp = EFD_ITEM(lip);
440
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 /*
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 */
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000445 if (!(lip->li_flags & XFS_LI_ABORTED))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 xfs_efi_release(efdp->efd_efip, efdp->efd_format.efd_nextents);
447
Christoph Hellwig7d795ca2005-06-21 15:41:19 +1000448 xfs_efd_item_free(efdp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 return (xfs_lsn_t)-1;
450}
451
452/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 * 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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459STATIC void
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000460xfs_efd_item_committing(
461 struct xfs_log_item *lip,
462 xfs_lsn_t lsn)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464}
465
466/*
467 * This is the ops vector shared by all efd log items.
468 */
Christoph Hellwig272e42b2011-10-28 09:54:24 +0000469static const struct xfs_item_ops xfs_efd_item_ops = {
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000470 .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,
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000474 .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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478};
479
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480/*
481 * Allocate and initialize an efd item with the given number of extents.
482 */
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000483struct xfs_efd_log_item *
484xfs_efd_init(
485 struct xfs_mount *mp,
486 struct xfs_efi_log_item *efip,
487 uint nextents)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488
489{
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000490 struct xfs_efd_log_item *efdp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 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)));
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000497 efdp = kmem_zalloc(size, KM_SLEEP);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 } else {
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000499 efdp = kmem_zone_zalloc(xfs_efd_zone, KM_SLEEP);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 }
501
Dave Chinner43f5efc2010-03-23 10:10:00 +1100502 xfs_log_item_init(mp, &efdp->efd_item, XFS_LI_EFD, &xfs_efd_item_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 efdp->efd_efip = efip;
504 efdp->efd_format.efd_nextents = nextents;
505 efdp->efd_format.efd_efi_id = efip->efi_format.efi_id;
506
Christoph Hellwig7bfa31d2010-06-23 18:11:15 +1000507 return efdp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508}