2 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
3 * Copyright (c) 2012 Red Hat, Inc.
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation.
10 * This program is distributed in the hope that it would be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "xfs_types.h"
25 #include "xfs_trans.h"
29 #include "xfs_mount.h"
30 #include "xfs_da_btree.h"
31 #include "xfs_bmap_btree.h"
32 #include "xfs_ialloc_btree.h"
33 #include "xfs_dinode.h"
34 #include "xfs_inode.h"
35 #include "xfs_inode_item.h"
36 #include "xfs_itable.h"
37 #include "xfs_ialloc.h"
38 #include "xfs_alloc.h"
42 #include "xfs_error.h"
43 #include "xfs_quota.h"
44 #include "xfs_utils.h"
45 #include "xfs_rtalloc.h"
46 #include "xfs_trans_space.h"
47 #include "xfs_log_priv.h"
48 #include "xfs_filestream.h"
49 #include "xfs_vnodeops.h"
50 #include "xfs_trace.h"
51 #include "xfs_icache.h"
52 #include "xfs_symlink.h"
56 * This is called by xfs_inactive to free any blocks beyond eof
57 * when the link count isn't zero and by xfs_dm_punch_hole() when
58 * punching a hole to EOF.
68 xfs_fileoff_t end_fsb;
69 xfs_fileoff_t last_fsb;
70 xfs_filblks_t map_len;
75 * Figure out if there are any blocks beyond the end
76 * of the file. If not, then there is nothing to do.
78 end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_ISIZE(ip));
79 last_fsb = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes);
80 if (last_fsb <= end_fsb)
82 map_len = last_fsb - end_fsb;
85 xfs_ilock(ip, XFS_ILOCK_SHARED);
86 error = xfs_bmapi_read(ip, end_fsb, map_len, &imap, &nimaps, 0);
87 xfs_iunlock(ip, XFS_ILOCK_SHARED);
89 if (!error && (nimaps != 0) &&
90 (imap.br_startblock != HOLESTARTBLOCK ||
91 ip->i_delayed_blks)) {
93 * Attach the dquots to the inode up front.
95 error = xfs_qm_dqattach(ip, 0);
100 * There are blocks after the end of file.
101 * Free them up now by truncating the file to
104 tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE);
107 if (!xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL)) {
108 xfs_trans_cancel(tp, 0);
113 error = xfs_trans_reserve(tp, 0,
114 XFS_ITRUNCATE_LOG_RES(mp),
115 0, XFS_TRANS_PERM_LOG_RES,
116 XFS_ITRUNCATE_LOG_COUNT);
118 ASSERT(XFS_FORCED_SHUTDOWN(mp));
119 xfs_trans_cancel(tp, 0);
121 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
125 xfs_ilock(ip, XFS_ILOCK_EXCL);
126 xfs_trans_ijoin(tp, ip, 0);
129 * Do not update the on-disk file size. If we update the
130 * on-disk file size and then the system crashes before the
131 * contents of the file are flushed to disk then the files
132 * may be full of holes (ie NULL files bug).
134 error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK,
138 * If we get an error at this point we simply don't
139 * bother truncating the file.
142 (XFS_TRANS_RELEASE_LOG_RES |
145 error = xfs_trans_commit(tp,
146 XFS_TRANS_RELEASE_LOG_RES);
148 xfs_inode_clear_eofblocks_tag(ip);
151 xfs_iunlock(ip, XFS_ILOCK_EXCL);
153 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
162 xfs_mount_t *mp = ip->i_mount;
165 if (!S_ISREG(ip->i_d.di_mode) || (ip->i_d.di_mode == 0))
168 /* If this is a read-only mount, don't do this (would generate I/O) */
169 if (mp->m_flags & XFS_MOUNT_RDONLY)
172 if (!XFS_FORCED_SHUTDOWN(mp)) {
176 * If we are using filestreams, and we have an unlinked
177 * file that we are processing the last close on, then nothing
178 * will be able to reopen and write to this file. Purge this
179 * inode from the filestreams cache so that it doesn't delay
180 * teardown of the inode.
182 if ((ip->i_d.di_nlink == 0) && xfs_inode_is_filestream(ip))
183 xfs_filestream_deassociate(ip);
186 * If we previously truncated this file and removed old data
187 * in the process, we want to initiate "early" writeout on
188 * the last close. This is an attempt to combat the notorious
189 * NULL files problem which is particularly noticeable from a
190 * truncate down, buffered (re-)write (delalloc), followed by
191 * a crash. What we are effectively doing here is
192 * significantly reducing the time window where we'd otherwise
193 * be exposed to that problem.
195 truncated = xfs_iflags_test_and_clear(ip, XFS_ITRUNCATED);
197 xfs_iflags_clear(ip, XFS_IDIRTY_RELEASE);
198 if (VN_DIRTY(VFS_I(ip)) && ip->i_delayed_blks > 0) {
199 error = -filemap_flush(VFS_I(ip)->i_mapping);
206 if (ip->i_d.di_nlink == 0)
209 if (xfs_can_free_eofblocks(ip, false)) {
212 * If we can't get the iolock just skip truncating the blocks
213 * past EOF because we could deadlock with the mmap_sem
214 * otherwise. We'll get another chance to drop them once the
215 * last reference to the inode is dropped, so we'll never leak
216 * blocks permanently.
218 * Further, check if the inode is being opened, written and
219 * closed frequently and we have delayed allocation blocks
220 * outstanding (e.g. streaming writes from the NFS server),
221 * truncating the blocks past EOF will cause fragmentation to
224 * In this case don't do the truncation, either, but we have to
225 * be careful how we detect this case. Blocks beyond EOF show
226 * up as i_delayed_blks even when the inode is clean, so we
227 * need to truncate them away first before checking for a dirty
228 * release. Hence on the first dirty close we will still remove
229 * the speculative allocation, but after that we will leave it
232 if (xfs_iflags_test(ip, XFS_IDIRTY_RELEASE))
235 error = xfs_free_eofblocks(mp, ip, true);
236 if (error && error != EAGAIN)
239 /* delalloc blocks after truncation means it really is dirty */
240 if (ip->i_delayed_blks)
241 xfs_iflags_set(ip, XFS_IDIRTY_RELEASE);
249 * This is called when the vnode reference count for the vnode
250 * goes to zero. If the file has been unlinked, then it must
251 * now be truncated. Also, we clear all of the read-ahead state
252 * kept for the inode here since the file is now closed.
258 xfs_bmap_free_t free_list;
259 xfs_fsblock_t first_block;
267 * If the inode is already free, then there can be nothing
270 if (ip->i_d.di_mode == 0 || is_bad_inode(VFS_I(ip))) {
271 ASSERT(ip->i_df.if_real_bytes == 0);
272 ASSERT(ip->i_df.if_broot_bytes == 0);
273 return VN_INACTIVE_CACHE;
280 /* If this is a read-only mount, don't do this (would generate I/O) */
281 if (mp->m_flags & XFS_MOUNT_RDONLY)
284 if (ip->i_d.di_nlink != 0) {
286 * force is true because we are evicting an inode from the
287 * cache. Post-eof blocks must be freed, lest we end up with
288 * broken free space accounting.
290 if (xfs_can_free_eofblocks(ip, true)) {
291 error = xfs_free_eofblocks(mp, ip, false);
293 return VN_INACTIVE_CACHE;
298 if (S_ISREG(ip->i_d.di_mode) &&
299 (ip->i_d.di_size != 0 || XFS_ISIZE(ip) != 0 ||
300 ip->i_d.di_nextents > 0 || ip->i_delayed_blks > 0))
303 error = xfs_qm_dqattach(ip, 0);
305 return VN_INACTIVE_CACHE;
307 tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE);
308 error = xfs_trans_reserve(tp, 0,
309 (truncate || S_ISLNK(ip->i_d.di_mode)) ?
310 XFS_ITRUNCATE_LOG_RES(mp) :
311 XFS_IFREE_LOG_RES(mp),
313 XFS_TRANS_PERM_LOG_RES,
314 XFS_ITRUNCATE_LOG_COUNT);
316 ASSERT(XFS_FORCED_SHUTDOWN(mp));
317 xfs_trans_cancel(tp, 0);
318 return VN_INACTIVE_CACHE;
321 xfs_ilock(ip, XFS_ILOCK_EXCL);
322 xfs_trans_ijoin(tp, ip, 0);
324 if (S_ISLNK(ip->i_d.di_mode)) {
325 error = xfs_inactive_symlink(ip, &tp);
328 } else if (truncate) {
330 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
332 error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, 0);
336 ASSERT(ip->i_d.di_nextents == 0);
340 * If there are attributes associated with the file then blow them away
341 * now. The code calls a routine that recursively deconstructs the
342 * attribute fork. We need to just commit the current transaction
343 * because we can't use it for xfs_attr_inactive().
345 if (ip->i_d.di_anextents > 0) {
346 ASSERT(ip->i_d.di_forkoff != 0);
348 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
352 xfs_iunlock(ip, XFS_ILOCK_EXCL);
354 error = xfs_attr_inactive(ip);
358 tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE);
359 error = xfs_trans_reserve(tp, 0,
360 XFS_IFREE_LOG_RES(mp),
361 0, XFS_TRANS_PERM_LOG_RES,
362 XFS_INACTIVE_LOG_COUNT);
364 xfs_trans_cancel(tp, 0);
368 xfs_ilock(ip, XFS_ILOCK_EXCL);
369 xfs_trans_ijoin(tp, ip, 0);
373 xfs_idestroy_fork(ip, XFS_ATTR_FORK);
375 ASSERT(ip->i_d.di_anextents == 0);
380 xfs_bmap_init(&free_list, &first_block);
381 error = xfs_ifree(tp, ip, &free_list);
384 * If we fail to free the inode, shut down. The cancel
385 * might do that, we need to make sure. Otherwise the
386 * inode might be lost for a long time or forever.
388 if (!XFS_FORCED_SHUTDOWN(mp)) {
389 xfs_notice(mp, "%s: xfs_ifree returned error %d",
391 xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR);
393 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT);
396 * Credit the quota account(s). The inode is gone.
398 xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_ICOUNT, -1);
401 * Just ignore errors at this point. There is nothing we can
402 * do except to try to keep going. Make sure it's not a silent
405 error = xfs_bmap_finish(&tp, &free_list, &committed);
407 xfs_notice(mp, "%s: xfs_bmap_finish returned error %d",
409 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
411 xfs_notice(mp, "%s: xfs_trans_commit returned error %d",
416 * Release the dquots held by inode, if any.
420 xfs_iunlock(ip, XFS_ILOCK_EXCL);
422 return VN_INACTIVE_CACHE;
424 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
429 * Lookups up an inode from "name". If ci_name is not NULL, then a CI match
430 * is allowed, otherwise it has to be an exact match. If a CI match is found,
431 * ci_name->name will point to a the actual name (caller must free) or
432 * will be set to NULL if an exact match is found.
437 struct xfs_name *name,
439 struct xfs_name *ci_name)
445 trace_xfs_lookup(dp, name);
447 if (XFS_FORCED_SHUTDOWN(dp->i_mount))
448 return XFS_ERROR(EIO);
450 lock_mode = xfs_ilock_map_shared(dp);
451 error = xfs_dir_lookup(NULL, dp, name, &inum, ci_name);
452 xfs_iunlock_map_shared(dp, lock_mode);
457 error = xfs_iget(dp->i_mount, NULL, inum, 0, 0, ipp);
465 kmem_free(ci_name->name);
474 struct xfs_name *name,
479 int is_dir = S_ISDIR(mode);
480 struct xfs_mount *mp = dp->i_mount;
481 struct xfs_inode *ip = NULL;
482 struct xfs_trans *tp = NULL;
484 xfs_bmap_free_t free_list;
485 xfs_fsblock_t first_block;
486 bool unlock_dp_on_error = false;
490 struct xfs_dquot *udqp = NULL;
491 struct xfs_dquot *gdqp = NULL;
492 struct xfs_dquot *pdqp = NULL;
497 trace_xfs_create(dp, name);
499 if (XFS_FORCED_SHUTDOWN(mp))
500 return XFS_ERROR(EIO);
502 if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)
503 prid = xfs_get_projid(dp);
505 prid = XFS_PROJID_DEFAULT;
508 * Make sure that we have allocated dquot(s) on disk.
510 error = xfs_qm_vop_dqalloc(dp, current_fsuid(), current_fsgid(), prid,
511 XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT,
512 &udqp, &gdqp, &pdqp);
518 resblks = XFS_MKDIR_SPACE_RES(mp, name->len);
519 log_res = XFS_MKDIR_LOG_RES(mp);
520 log_count = XFS_MKDIR_LOG_COUNT;
521 tp = xfs_trans_alloc(mp, XFS_TRANS_MKDIR);
523 resblks = XFS_CREATE_SPACE_RES(mp, name->len);
524 log_res = XFS_CREATE_LOG_RES(mp);
525 log_count = XFS_CREATE_LOG_COUNT;
526 tp = xfs_trans_alloc(mp, XFS_TRANS_CREATE);
529 cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
532 * Initially assume that the file does not exist and
533 * reserve the resources for that case. If that is not
534 * the case we'll drop the one we have and get a more
535 * appropriate transaction later.
537 error = xfs_trans_reserve(tp, resblks, log_res, 0,
538 XFS_TRANS_PERM_LOG_RES, log_count);
539 if (error == ENOSPC) {
540 /* flush outstanding delalloc blocks and retry */
541 xfs_flush_inodes(mp);
542 error = xfs_trans_reserve(tp, resblks, log_res, 0,
543 XFS_TRANS_PERM_LOG_RES, log_count);
545 if (error == ENOSPC) {
546 /* No space at all so try a "no-allocation" reservation */
548 error = xfs_trans_reserve(tp, 0, log_res, 0,
549 XFS_TRANS_PERM_LOG_RES, log_count);
553 goto out_trans_cancel;
556 xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT);
557 unlock_dp_on_error = true;
559 xfs_bmap_init(&free_list, &first_block);
562 * Reserve disk quota and the inode.
564 error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp,
565 pdqp, resblks, 1, 0);
567 goto out_trans_cancel;
569 error = xfs_dir_canenter(tp, dp, name, resblks);
571 goto out_trans_cancel;
574 * A newly created regular or special file just has one directory
575 * entry pointing to them, but a directory also the "." entry
576 * pointing to itself.
578 error = xfs_dir_ialloc(&tp, dp, mode, is_dir ? 2 : 1, rdev,
579 prid, resblks > 0, &ip, &committed);
582 goto out_trans_cancel;
583 goto out_trans_abort;
587 * Now we join the directory inode to the transaction. We do not do it
588 * earlier because xfs_dir_ialloc might commit the previous transaction
589 * (and release all the locks). An error from here on will result in
590 * the transaction cancel unlocking dp so don't do it explicitly in the
593 xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
594 unlock_dp_on_error = false;
596 error = xfs_dir_createname(tp, dp, name, ip->i_ino,
597 &first_block, &free_list, resblks ?
598 resblks - XFS_IALLOC_SPACE_RES(mp) : 0);
600 ASSERT(error != ENOSPC);
601 goto out_trans_abort;
603 xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
604 xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
607 error = xfs_dir_init(tp, ip, dp);
609 goto out_bmap_cancel;
611 error = xfs_bumplink(tp, dp);
613 goto out_bmap_cancel;
617 * If this is a synchronous mount, make sure that the
618 * create transaction goes to disk before returning to
621 if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC))
622 xfs_trans_set_sync(tp);
625 * Attach the dquot(s) to the inodes and modify them incore.
626 * These ids of the inode couldn't have changed since the new
627 * inode has been locked ever since it was created.
629 xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp, pdqp);
631 error = xfs_bmap_finish(&tp, &free_list, &committed);
633 goto out_bmap_cancel;
635 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
637 goto out_release_inode;
647 xfs_bmap_cancel(&free_list);
649 cancel_flags |= XFS_TRANS_ABORT;
651 xfs_trans_cancel(tp, cancel_flags);
654 * Wait until after the current transaction is aborted to
655 * release the inode. This prevents recursive transactions
656 * and deadlocks from xfs_inactive.
665 if (unlock_dp_on_error)
666 xfs_iunlock(dp, XFS_ILOCK_EXCL);
672 int xfs_small_retries;
673 int xfs_middle_retries;
674 int xfs_lots_retries;
679 * Bump the subclass so xfs_lock_inodes() acquires each lock with
683 xfs_lock_inumorder(int lock_mode, int subclass)
685 if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL))
686 lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_IOLOCK_SHIFT;
687 if (lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL))
688 lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_ILOCK_SHIFT;
694 * The following routine will lock n inodes in exclusive mode.
695 * We assume the caller calls us with the inodes in i_ino order.
697 * We need to detect deadlock where an inode that we lock
698 * is in the AIL and we start waiting for another inode that is locked
699 * by a thread in a long running transaction (such as truncate). This can
700 * result in deadlock since the long running trans might need to wait
701 * for the inode we just locked in order to push the tail and free space
710 int attempts = 0, i, j, try_lock;
713 ASSERT(ips && (inodes >= 2)); /* we need at least two */
719 for (; i < inodes; i++) {
722 if (i && (ips[i] == ips[i-1])) /* Already locked */
726 * If try_lock is not set yet, make sure all locked inodes
727 * are not in the AIL.
728 * If any are, set try_lock to be used later.
732 for (j = (i - 1); j >= 0 && !try_lock; j--) {
733 lp = (xfs_log_item_t *)ips[j]->i_itemp;
734 if (lp && (lp->li_flags & XFS_LI_IN_AIL)) {
741 * If any of the previous locks we have locked is in the AIL,
742 * we must TRY to get the second and subsequent locks. If
743 * we can't get any, we must release all we have
748 /* try_lock must be 0 if i is 0. */
750 * try_lock means we have an inode locked
751 * that is in the AIL.
754 if (!xfs_ilock_nowait(ips[i], xfs_lock_inumorder(lock_mode, i))) {
758 * Unlock all previous guys and try again.
759 * xfs_iunlock will try to push the tail
760 * if the inode is in the AIL.
763 for(j = i - 1; j >= 0; j--) {
766 * Check to see if we've already
768 * Not the first one going back,
769 * and the inode ptr is the same.
771 if ((j != (i - 1)) && ips[j] ==
775 xfs_iunlock(ips[j], lock_mode);
778 if ((attempts % 5) == 0) {
779 delay(1); /* Don't just spin the CPU */
789 xfs_ilock(ips[i], xfs_lock_inumorder(lock_mode, i));
795 if (attempts < 5) xfs_small_retries++;
796 else if (attempts < 100) xfs_middle_retries++;
797 else xfs_lots_retries++;
805 * xfs_lock_two_inodes() can only be used to lock one type of lock
806 * at a time - the iolock or the ilock, but not both at once. If
807 * we lock both at once, lockdep will report false positives saying
808 * we have violated locking orders.
820 if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL))
821 ASSERT((lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) == 0);
822 ASSERT(ip0->i_ino != ip1->i_ino);
824 if (ip0->i_ino > ip1->i_ino) {
831 xfs_ilock(ip0, xfs_lock_inumorder(lock_mode, 0));
834 * If the first lock we have locked is in the AIL, we must TRY to get
835 * the second lock. If we can't get it, we must release the first one
838 lp = (xfs_log_item_t *)ip0->i_itemp;
839 if (lp && (lp->li_flags & XFS_LI_IN_AIL)) {
840 if (!xfs_ilock_nowait(ip1, xfs_lock_inumorder(lock_mode, 1))) {
841 xfs_iunlock(ip0, lock_mode);
842 if ((++attempts % 5) == 0)
843 delay(1); /* Don't just spin the CPU */
847 xfs_ilock(ip1, xfs_lock_inumorder(lock_mode, 1));
854 struct xfs_name *name,
857 xfs_mount_t *mp = dp->i_mount;
858 xfs_trans_t *tp = NULL;
859 int is_dir = S_ISDIR(ip->i_d.di_mode);
861 xfs_bmap_free_t free_list;
862 xfs_fsblock_t first_block;
869 trace_xfs_remove(dp, name);
871 if (XFS_FORCED_SHUTDOWN(mp))
872 return XFS_ERROR(EIO);
874 error = xfs_qm_dqattach(dp, 0);
878 error = xfs_qm_dqattach(ip, 0);
883 tp = xfs_trans_alloc(mp, XFS_TRANS_RMDIR);
884 log_count = XFS_DEFAULT_LOG_COUNT;
886 tp = xfs_trans_alloc(mp, XFS_TRANS_REMOVE);
887 log_count = XFS_REMOVE_LOG_COUNT;
889 cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
892 * We try to get the real space reservation first,
893 * allowing for directory btree deletion(s) implying
894 * possible bmap insert(s). If we can't get the space
895 * reservation then we use 0 instead, and avoid the bmap
896 * btree insert(s) in the directory code by, if the bmap
897 * insert tries to happen, instead trimming the LAST
898 * block from the directory.
900 resblks = XFS_REMOVE_SPACE_RES(mp);
901 error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0,
902 XFS_TRANS_PERM_LOG_RES, log_count);
903 if (error == ENOSPC) {
905 error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0,
906 XFS_TRANS_PERM_LOG_RES, log_count);
909 ASSERT(error != ENOSPC);
911 goto out_trans_cancel;
914 xfs_lock_two_inodes(dp, ip, XFS_ILOCK_EXCL);
916 xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
917 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
920 * If we're removing a directory perform some additional validation.
923 ASSERT(ip->i_d.di_nlink >= 2);
924 if (ip->i_d.di_nlink != 2) {
925 error = XFS_ERROR(ENOTEMPTY);
926 goto out_trans_cancel;
928 if (!xfs_dir_isempty(ip)) {
929 error = XFS_ERROR(ENOTEMPTY);
930 goto out_trans_cancel;
934 xfs_bmap_init(&free_list, &first_block);
935 error = xfs_dir_removename(tp, dp, name, ip->i_ino,
936 &first_block, &free_list, resblks);
938 ASSERT(error != ENOENT);
939 goto out_bmap_cancel;
941 xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
945 * Drop the link from ip's "..".
947 error = xfs_droplink(tp, dp);
949 goto out_bmap_cancel;
952 * Drop the "." link from ip to self.
954 error = xfs_droplink(tp, ip);
956 goto out_bmap_cancel;
959 * When removing a non-directory we need to log the parent
960 * inode here. For a directory this is done implicitly
961 * by the xfs_droplink call for the ".." entry.
963 xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
967 * Drop the link from dp to ip.
969 error = xfs_droplink(tp, ip);
971 goto out_bmap_cancel;
974 * Determine if this is the last link while
975 * we are in the transaction.
977 link_zero = (ip->i_d.di_nlink == 0);
980 * If this is a synchronous mount, make sure that the
981 * remove transaction goes to disk before returning to
984 if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC))
985 xfs_trans_set_sync(tp);
987 error = xfs_bmap_finish(&tp, &free_list, &committed);
989 goto out_bmap_cancel;
991 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
996 * If we are using filestreams, kill the stream association.
997 * If the file is still open it may get a new one but that
998 * will get killed on last close in xfs_close() so we don't
999 * have to worry about that.
1001 if (!is_dir && link_zero && xfs_inode_is_filestream(ip))
1002 xfs_filestream_deassociate(ip);
1007 xfs_bmap_cancel(&free_list);
1008 cancel_flags |= XFS_TRANS_ABORT;
1010 xfs_trans_cancel(tp, cancel_flags);
1019 struct xfs_name *target_name)
1021 xfs_mount_t *mp = tdp->i_mount;
1024 xfs_bmap_free_t free_list;
1025 xfs_fsblock_t first_block;
1030 trace_xfs_link(tdp, target_name);
1032 ASSERT(!S_ISDIR(sip->i_d.di_mode));
1034 if (XFS_FORCED_SHUTDOWN(mp))
1035 return XFS_ERROR(EIO);
1037 error = xfs_qm_dqattach(sip, 0);
1041 error = xfs_qm_dqattach(tdp, 0);
1045 tp = xfs_trans_alloc(mp, XFS_TRANS_LINK);
1046 cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
1047 resblks = XFS_LINK_SPACE_RES(mp, target_name->len);
1048 error = xfs_trans_reserve(tp, resblks, XFS_LINK_LOG_RES(mp), 0,
1049 XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT);
1050 if (error == ENOSPC) {
1052 error = xfs_trans_reserve(tp, 0, XFS_LINK_LOG_RES(mp), 0,
1053 XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT);
1060 xfs_lock_two_inodes(sip, tdp, XFS_ILOCK_EXCL);
1062 xfs_trans_ijoin(tp, sip, XFS_ILOCK_EXCL);
1063 xfs_trans_ijoin(tp, tdp, XFS_ILOCK_EXCL);
1066 * If we are using project inheritance, we only allow hard link
1067 * creation in our tree when the project IDs are the same; else
1068 * the tree quota mechanism could be circumvented.
1070 if (unlikely((tdp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&
1071 (xfs_get_projid(tdp) != xfs_get_projid(sip)))) {
1072 error = XFS_ERROR(EXDEV);
1076 error = xfs_dir_canenter(tp, tdp, target_name, resblks);
1080 xfs_bmap_init(&free_list, &first_block);
1082 error = xfs_dir_createname(tp, tdp, target_name, sip->i_ino,
1083 &first_block, &free_list, resblks);
1086 xfs_trans_ichgtime(tp, tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
1087 xfs_trans_log_inode(tp, tdp, XFS_ILOG_CORE);
1089 error = xfs_bumplink(tp, sip);
1094 * If this is a synchronous mount, make sure that the
1095 * link transaction goes to disk before returning to
1098 if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) {
1099 xfs_trans_set_sync(tp);
1102 error = xfs_bmap_finish (&tp, &free_list, &committed);
1104 xfs_bmap_cancel(&free_list);
1108 return xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
1111 cancel_flags |= XFS_TRANS_ABORT;
1113 xfs_trans_cancel(tp, cancel_flags);
1124 xfs_mount_t *mp = ip->i_mount;
1128 if (!capable(CAP_SYS_ADMIN))
1129 return XFS_ERROR(EPERM);
1131 if (XFS_FORCED_SHUTDOWN(mp))
1132 return XFS_ERROR(EIO);
1134 tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS);
1135 error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES (mp), 0, 0, 0);
1137 xfs_trans_cancel(tp, 0);
1140 xfs_ilock(ip, XFS_ILOCK_EXCL);
1141 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1143 ip->i_d.di_dmevmask = evmask;
1144 ip->i_d.di_dmstate = state;
1146 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1147 error = xfs_trans_commit(tp, 0);
1153 * xfs_alloc_file_space()
1154 * This routine allocates disk space for the given file.
1156 * If alloc_type == 0, this request is for an ALLOCSP type
1157 * request which will change the file size. In this case, no
1158 * DMAPI event will be generated by the call. A TRUNCATE event
1159 * will be generated later by xfs_setattr.
1161 * If alloc_type != 0, this request is for a RESVSP type
1162 * request, and a DMAPI DM_EVENT_WRITE will be generated if the
1163 * lower block boundary byte address is less than the file's
1172 xfs_alloc_file_space(
1179 xfs_mount_t *mp = ip->i_mount;
1181 xfs_filblks_t allocated_fsb;
1182 xfs_filblks_t allocatesize_fsb;
1183 xfs_extlen_t extsz, temp;
1184 xfs_fileoff_t startoffset_fsb;
1185 xfs_fsblock_t firstfsb;
1190 xfs_bmbt_irec_t imaps[1], *imapp;
1191 xfs_bmap_free_t free_list;
1192 uint qblocks, resblks, resrtextents;
1196 trace_xfs_alloc_file_space(ip);
1198 if (XFS_FORCED_SHUTDOWN(mp))
1199 return XFS_ERROR(EIO);
1201 error = xfs_qm_dqattach(ip, 0);
1206 return XFS_ERROR(EINVAL);
1208 rt = XFS_IS_REALTIME_INODE(ip);
1209 extsz = xfs_get_extsz_hint(ip);
1214 startoffset_fsb = XFS_B_TO_FSBT(mp, offset);
1215 allocatesize_fsb = XFS_B_TO_FSB(mp, count);
1218 * Allocate file space until done or until there is an error
1220 while (allocatesize_fsb && !error) {
1224 * Determine space reservations for data/realtime.
1226 if (unlikely(extsz)) {
1227 s = startoffset_fsb;
1230 e = startoffset_fsb + allocatesize_fsb;
1231 if ((temp = do_mod(startoffset_fsb, extsz)))
1233 if ((temp = do_mod(e, extsz)))
1237 e = allocatesize_fsb;
1241 * The transaction reservation is limited to a 32-bit block
1242 * count, hence we need to limit the number of blocks we are
1243 * trying to reserve to avoid an overflow. We can't allocate
1244 * more than @nimaps extents, and an extent is limited on disk
1245 * to MAXEXTLEN (21 bits), so use that to enforce the limit.
1247 resblks = min_t(xfs_fileoff_t, (e - s), (MAXEXTLEN * nimaps));
1249 resrtextents = qblocks = resblks;
1250 resrtextents /= mp->m_sb.sb_rextsize;
1251 resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0);
1252 quota_flag = XFS_QMOPT_RES_RTBLKS;
1255 resblks = qblocks = XFS_DIOSTRAT_SPACE_RES(mp, resblks);
1256 quota_flag = XFS_QMOPT_RES_REGBLKS;
1260 * Allocate and setup the transaction.
1262 tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT);
1263 error = xfs_trans_reserve(tp, resblks,
1264 XFS_WRITE_LOG_RES(mp), resrtextents,
1265 XFS_TRANS_PERM_LOG_RES,
1266 XFS_WRITE_LOG_COUNT);
1268 * Check for running out of space
1272 * Free the transaction structure.
1274 ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp));
1275 xfs_trans_cancel(tp, 0);
1278 xfs_ilock(ip, XFS_ILOCK_EXCL);
1279 error = xfs_trans_reserve_quota_nblks(tp, ip, qblocks,
1284 xfs_trans_ijoin(tp, ip, 0);
1286 xfs_bmap_init(&free_list, &firstfsb);
1287 error = xfs_bmapi_write(tp, ip, startoffset_fsb,
1288 allocatesize_fsb, alloc_type, &firstfsb,
1289 0, imapp, &nimaps, &free_list);
1295 * Complete the transaction
1297 error = xfs_bmap_finish(&tp, &free_list, &committed);
1302 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
1303 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1308 allocated_fsb = imapp->br_blockcount;
1311 error = XFS_ERROR(ENOSPC);
1315 startoffset_fsb += allocated_fsb;
1316 allocatesize_fsb -= allocated_fsb;
1321 error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */
1322 xfs_bmap_cancel(&free_list);
1323 xfs_trans_unreserve_quota_nblks(tp, ip, (long)qblocks, 0, quota_flag);
1325 error1: /* Just cancel transaction */
1326 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
1327 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1332 * Zero file bytes between startoff and endoff inclusive.
1333 * The iolock is held exclusive and no blocks are buffered.
1335 * This function is used by xfs_free_file_space() to zero
1336 * partial blocks when the range to free is not block aligned.
1337 * When unreserving space with boundaries that are not block
1338 * aligned we round up the start and round down the end
1339 * boundaries and then use this function to zero the parts of
1340 * the blocks that got dropped during the rounding.
1343 xfs_zero_remaining_bytes(
1348 xfs_bmbt_irec_t imap;
1349 xfs_fileoff_t offset_fsb;
1350 xfs_off_t lastoffset;
1353 xfs_mount_t *mp = ip->i_mount;
1358 * Avoid doing I/O beyond eof - it's not necessary
1359 * since nothing can read beyond eof. The space will
1360 * be zeroed when the file is extended anyway.
1362 if (startoff >= XFS_ISIZE(ip))
1365 if (endoff > XFS_ISIZE(ip))
1366 endoff = XFS_ISIZE(ip);
1368 bp = xfs_buf_get_uncached(XFS_IS_REALTIME_INODE(ip) ?
1369 mp->m_rtdev_targp : mp->m_ddev_targp,
1370 BTOBB(mp->m_sb.sb_blocksize), 0);
1372 return XFS_ERROR(ENOMEM);
1376 for (offset = startoff; offset <= endoff; offset = lastoffset + 1) {
1377 offset_fsb = XFS_B_TO_FSBT(mp, offset);
1379 error = xfs_bmapi_read(ip, offset_fsb, 1, &imap, &nimap, 0);
1380 if (error || nimap < 1)
1382 ASSERT(imap.br_blockcount >= 1);
1383 ASSERT(imap.br_startoff == offset_fsb);
1384 lastoffset = XFS_FSB_TO_B(mp, imap.br_startoff + 1) - 1;
1385 if (lastoffset > endoff)
1386 lastoffset = endoff;
1387 if (imap.br_startblock == HOLESTARTBLOCK)
1389 ASSERT(imap.br_startblock != DELAYSTARTBLOCK);
1390 if (imap.br_state == XFS_EXT_UNWRITTEN)
1393 XFS_BUF_UNWRITE(bp);
1395 XFS_BUF_SET_ADDR(bp, xfs_fsb_to_db(ip, imap.br_startblock));
1397 error = xfs_buf_iowait(bp);
1399 xfs_buf_ioerror_alert(bp,
1400 "xfs_zero_remaining_bytes(read)");
1404 (offset - XFS_FSB_TO_B(mp, imap.br_startoff)),
1405 0, lastoffset - offset + 1);
1410 error = xfs_buf_iowait(bp);
1412 xfs_buf_ioerror_alert(bp,
1413 "xfs_zero_remaining_bytes(write)");
1422 * xfs_free_file_space()
1423 * This routine frees disk space for the given file.
1425 * This routine is only called by xfs_change_file_space
1426 * for an UNRESVSP type call.
1434 xfs_free_file_space(
1442 xfs_fileoff_t endoffset_fsb;
1444 xfs_fsblock_t firstfsb;
1445 xfs_bmap_free_t free_list;
1446 xfs_bmbt_irec_t imap;
1454 xfs_fileoff_t startoffset_fsb;
1456 int need_iolock = 1;
1460 trace_xfs_free_file_space(ip);
1462 error = xfs_qm_dqattach(ip, 0);
1467 if (len <= 0) /* if nothing being freed */
1469 rt = XFS_IS_REALTIME_INODE(ip);
1470 startoffset_fsb = XFS_B_TO_FSB(mp, offset);
1471 endoffset_fsb = XFS_B_TO_FSBT(mp, offset + len);
1473 if (attr_flags & XFS_ATTR_NOLOCK)
1476 xfs_ilock(ip, XFS_IOLOCK_EXCL);
1477 /* wait for the completion of any pending DIOs */
1478 inode_dio_wait(VFS_I(ip));
1481 rounding = max_t(xfs_off_t, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE);
1482 ioffset = offset & ~(rounding - 1);
1483 error = -filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
1486 goto out_unlock_iolock;
1487 truncate_pagecache_range(VFS_I(ip), ioffset, -1);
1490 * Need to zero the stuff we're not freeing, on disk.
1491 * If it's a realtime file & can't use unwritten extents then we
1492 * actually need to zero the extent edges. Otherwise xfs_bunmapi
1493 * will take care of it for us.
1495 if (rt && !xfs_sb_version_hasextflgbit(&mp->m_sb)) {
1497 error = xfs_bmapi_read(ip, startoffset_fsb, 1,
1500 goto out_unlock_iolock;
1501 ASSERT(nimap == 0 || nimap == 1);
1502 if (nimap && imap.br_startblock != HOLESTARTBLOCK) {
1505 ASSERT(imap.br_startblock != DELAYSTARTBLOCK);
1506 block = imap.br_startblock;
1507 mod = do_div(block, mp->m_sb.sb_rextsize);
1509 startoffset_fsb += mp->m_sb.sb_rextsize - mod;
1512 error = xfs_bmapi_read(ip, endoffset_fsb - 1, 1,
1515 goto out_unlock_iolock;
1516 ASSERT(nimap == 0 || nimap == 1);
1517 if (nimap && imap.br_startblock != HOLESTARTBLOCK) {
1518 ASSERT(imap.br_startblock != DELAYSTARTBLOCK);
1520 if (mod && (mod != mp->m_sb.sb_rextsize))
1521 endoffset_fsb -= mod;
1524 if ((done = (endoffset_fsb <= startoffset_fsb)))
1526 * One contiguous piece to clear
1528 error = xfs_zero_remaining_bytes(ip, offset, offset + len - 1);
1531 * Some full blocks, possibly two pieces to clear
1533 if (offset < XFS_FSB_TO_B(mp, startoffset_fsb))
1534 error = xfs_zero_remaining_bytes(ip, offset,
1535 XFS_FSB_TO_B(mp, startoffset_fsb) - 1);
1537 XFS_FSB_TO_B(mp, endoffset_fsb) < offset + len)
1538 error = xfs_zero_remaining_bytes(ip,
1539 XFS_FSB_TO_B(mp, endoffset_fsb),
1544 * free file space until done or until there is an error
1546 resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0);
1547 while (!error && !done) {
1550 * allocate and setup the transaction. Allow this
1551 * transaction to dip into the reserve blocks to ensure
1552 * the freeing of the space succeeds at ENOSPC.
1554 tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT);
1555 tp->t_flags |= XFS_TRANS_RESERVE;
1556 error = xfs_trans_reserve(tp,
1558 XFS_WRITE_LOG_RES(mp),
1560 XFS_TRANS_PERM_LOG_RES,
1561 XFS_WRITE_LOG_COUNT);
1564 * check for running out of space
1568 * Free the transaction structure.
1570 ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp));
1571 xfs_trans_cancel(tp, 0);
1574 xfs_ilock(ip, XFS_ILOCK_EXCL);
1575 error = xfs_trans_reserve_quota(tp, mp,
1576 ip->i_udquot, ip->i_gdquot, ip->i_pdquot,
1577 resblks, 0, XFS_QMOPT_RES_REGBLKS);
1581 xfs_trans_ijoin(tp, ip, 0);
1584 * issue the bunmapi() call to free the blocks
1586 xfs_bmap_init(&free_list, &firstfsb);
1587 error = xfs_bunmapi(tp, ip, startoffset_fsb,
1588 endoffset_fsb - startoffset_fsb,
1589 0, 2, &firstfsb, &free_list, &done);
1595 * complete the transaction
1597 error = xfs_bmap_finish(&tp, &free_list, &committed);
1602 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
1603 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1608 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
1612 xfs_bmap_cancel(&free_list);
1614 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
1615 xfs_iunlock(ip, need_iolock ? (XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL) :
1622 xfs_zero_file_space(
1623 struct xfs_inode *ip,
1628 struct xfs_mount *mp = ip->i_mount;
1630 xfs_off_t start_boundary;
1631 xfs_off_t end_boundary;
1634 granularity = max_t(uint, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE);
1637 * Round the range of extents we are going to convert inwards. If the
1638 * offset is aligned, then it doesn't get changed so we zero from the
1639 * start of the block offset points to.
1641 start_boundary = round_up(offset, granularity);
1642 end_boundary = round_down(offset + len, granularity);
1644 ASSERT(start_boundary >= offset);
1645 ASSERT(end_boundary <= offset + len);
1647 if (!(attr_flags & XFS_ATTR_NOLOCK))
1648 xfs_ilock(ip, XFS_IOLOCK_EXCL);
1650 if (start_boundary < end_boundary - 1) {
1651 /* punch out the page cache over the conversion range */
1652 truncate_pagecache_range(VFS_I(ip), start_boundary,
1654 /* convert the blocks */
1655 error = xfs_alloc_file_space(ip, start_boundary,
1656 end_boundary - start_boundary - 1,
1657 XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT,
1662 /* We've handled the interior of the range, now for the edges */
1663 if (start_boundary != offset)
1664 error = xfs_iozero(ip, offset, start_boundary - offset);
1668 if (end_boundary != offset + len)
1669 error = xfs_iozero(ip, end_boundary,
1670 offset + len - end_boundary);
1674 * It's either a sub-granularity range or the range spanned lies
1675 * partially across two adjacent blocks.
1677 error = xfs_iozero(ip, offset, len);
1681 if (!(attr_flags & XFS_ATTR_NOLOCK))
1682 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
1688 * xfs_change_file_space()
1689 * This routine allocates or frees disk space for the given file.
1690 * The user specified parameters are checked for alignment and size
1699 xfs_change_file_space(
1706 xfs_mount_t *mp = ip->i_mount;
1711 xfs_off_t startoffset;
1715 if (!S_ISREG(ip->i_d.di_mode))
1716 return XFS_ERROR(EINVAL);
1718 switch (bf->l_whence) {
1719 case 0: /*SEEK_SET*/
1721 case 1: /*SEEK_CUR*/
1722 bf->l_start += offset;
1724 case 2: /*SEEK_END*/
1725 bf->l_start += XFS_ISIZE(ip);
1728 return XFS_ERROR(EINVAL);
1732 * length of <= 0 for resv/unresv/zero is invalid. length for
1733 * alloc/free is ignored completely and we have no idea what userspace
1734 * might have set it to, so set it to zero to allow range
1738 case XFS_IOC_ZERO_RANGE:
1739 case XFS_IOC_RESVSP:
1740 case XFS_IOC_RESVSP64:
1741 case XFS_IOC_UNRESVSP:
1742 case XFS_IOC_UNRESVSP64:
1744 return XFS_ERROR(EINVAL);
1751 if (bf->l_start < 0 ||
1752 bf->l_start > mp->m_super->s_maxbytes ||
1753 bf->l_start + bf->l_len < 0 ||
1754 bf->l_start + bf->l_len >= mp->m_super->s_maxbytes)
1755 return XFS_ERROR(EINVAL);
1759 startoffset = bf->l_start;
1760 fsize = XFS_ISIZE(ip);
1762 setprealloc = clrprealloc = 0;
1764 case XFS_IOC_ZERO_RANGE:
1765 error = xfs_zero_file_space(ip, startoffset, bf->l_len,
1772 case XFS_IOC_RESVSP:
1773 case XFS_IOC_RESVSP64:
1774 error = xfs_alloc_file_space(ip, startoffset, bf->l_len,
1775 XFS_BMAPI_PREALLOC, attr_flags);
1781 case XFS_IOC_UNRESVSP:
1782 case XFS_IOC_UNRESVSP64:
1783 if ((error = xfs_free_file_space(ip, startoffset, bf->l_len,
1788 case XFS_IOC_ALLOCSP:
1789 case XFS_IOC_ALLOCSP64:
1790 case XFS_IOC_FREESP:
1791 case XFS_IOC_FREESP64:
1793 * These operations actually do IO when extending the file, but
1794 * the allocation is done seperately to the zeroing that is
1795 * done. This set of operations need to be serialised against
1796 * other IO operations, such as truncate and buffered IO. We
1797 * need to take the IOLOCK here to serialise the allocation and
1798 * zeroing IO to prevent other IOLOCK holders (e.g. getbmap,
1799 * truncate, direct IO) from racing against the transient
1800 * allocated but not written state we can have here.
1802 xfs_ilock(ip, XFS_IOLOCK_EXCL);
1803 if (startoffset > fsize) {
1804 error = xfs_alloc_file_space(ip, fsize,
1805 startoffset - fsize, 0,
1806 attr_flags | XFS_ATTR_NOLOCK);
1808 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
1813 iattr.ia_valid = ATTR_SIZE;
1814 iattr.ia_size = startoffset;
1816 error = xfs_setattr_size(ip, &iattr,
1817 attr_flags | XFS_ATTR_NOLOCK);
1818 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
1828 return XFS_ERROR(EINVAL);
1832 * update the inode timestamp, mode, and prealloc flag bits
1834 tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID);
1836 if ((error = xfs_trans_reserve(tp, 0, XFS_WRITEID_LOG_RES(mp),
1839 xfs_trans_cancel(tp, 0);
1843 xfs_ilock(ip, XFS_ILOCK_EXCL);
1844 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1846 if ((attr_flags & XFS_ATTR_DMI) == 0) {
1847 ip->i_d.di_mode &= ~S_ISUID;
1850 * Note that we don't have to worry about mandatory
1851 * file locking being disabled here because we only
1852 * clear the S_ISGID bit if the Group execute bit is
1853 * on, but if it was on then mandatory locking wouldn't
1854 * have been enabled.
1856 if (ip->i_d.di_mode & S_IXGRP)
1857 ip->i_d.di_mode &= ~S_ISGID;
1859 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
1862 ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC;
1863 else if (clrprealloc)
1864 ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC;
1866 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1867 if (attr_flags & XFS_ATTR_SYNC)
1868 xfs_trans_set_sync(tp);
1869 return xfs_trans_commit(tp, 0);