2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
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
7 * published by the Free Software Foundation.
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.
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
19 #include <linux/capability.h>
23 #include "xfs_types.h"
27 #include "xfs_trans.h"
32 #include "xfs_dmapi.h"
33 #include "xfs_mount.h"
34 #include "xfs_da_btree.h"
35 #include "xfs_bmap_btree.h"
36 #include "xfs_alloc_btree.h"
37 #include "xfs_ialloc_btree.h"
38 #include "xfs_dir_sf.h"
39 #include "xfs_dir2_sf.h"
40 #include "xfs_attr_sf.h"
41 #include "xfs_dinode.h"
42 #include "xfs_inode.h"
43 #include "xfs_inode_item.h"
44 #include "xfs_dir_leaf.h"
45 #include "xfs_itable.h"
46 #include "xfs_btree.h"
47 #include "xfs_ialloc.h"
48 #include "xfs_alloc.h"
52 #include "xfs_error.h"
53 #include "xfs_quota.h"
54 #include "xfs_utils.h"
55 #include "xfs_rtalloc.h"
56 #include "xfs_refcache.h"
57 #include "xfs_trans_space.h"
58 #include "xfs_log_priv.h"
63 * The maximum pathlen is 1024 bytes. Since the minimum file system
64 * blocksize is 512 bytes, we can get a max of 2 extents back from
67 #define SYMLINK_MAPS 2
70 * For xfs, we check that the file isn't too big to be opened by this kernel.
71 * No other open action is required for regular files. Devices are handled
72 * through the specfs file system, pipes through fifofs. Device and
73 * fifo vnodes are "wrapped" by specfs and fifofs vnodes, respectively,
74 * when a new vnode is first looked up or created.
85 vp = BHV_TO_VNODE(bdp);
88 if (XFS_FORCED_SHUTDOWN(ip->i_mount))
89 return XFS_ERROR(EIO);
92 * If it's a directory with any blocks, read-ahead block 0
93 * as we're almost certain to have the next operation be a read there.
95 if (VN_ISDIR(vp) && ip->i_d.di_nextents > 0) {
96 mode = xfs_ilock_map_shared(ip);
97 if (ip->i_d.di_nextents > 0)
98 (void)xfs_da_reada_buf(NULL, ip, 0, XFS_DATA_FORK);
99 xfs_iunlock(ip, mode);
119 vp = BHV_TO_VNODE(bdp);
120 vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
122 ip = XFS_BHVTOI(bdp);
125 if (XFS_FORCED_SHUTDOWN(mp))
126 return XFS_ERROR(EIO);
128 if (!(flags & ATTR_LAZY))
129 xfs_ilock(ip, XFS_ILOCK_SHARED);
131 vap->va_size = ip->i_d.di_size;
132 if (vap->va_mask == XFS_AT_SIZE)
136 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
137 vap->va_nodeid = ip->i_ino;
139 vap->va_nodeid += mp->m_inoadd;
141 vap->va_nlink = ip->i_d.di_nlink;
144 * Quick exit for non-stat callers
147 ~(XFS_AT_SIZE|XFS_AT_FSID|XFS_AT_NODEID|
148 XFS_AT_NLINK|XFS_AT_BLKSIZE)) == 0)
152 * Copy from in-core inode.
154 vap->va_mode = ip->i_d.di_mode;
155 vap->va_uid = ip->i_d.di_uid;
156 vap->va_gid = ip->i_d.di_gid;
157 vap->va_projid = ip->i_d.di_projid;
160 * Check vnode type block/char vs. everything else.
162 switch (ip->i_d.di_mode & S_IFMT) {
165 vap->va_rdev = ip->i_df.if_u2.if_rdev;
166 vap->va_blocksize = BLKDEV_IOSIZE;
171 if (!(ip->i_d.di_flags & XFS_DIFLAG_REALTIME)) {
172 vap->va_blocksize = xfs_preferred_iosize(mp);
176 * If the file blocks are being allocated from a
177 * realtime partition, then return the inode's
178 * realtime extent size or the realtime volume's
181 vap->va_blocksize = ip->i_d.di_extsize ?
182 (ip->i_d.di_extsize << mp->m_sb.sb_blocklog) :
183 (mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog);
188 vn_atime_to_timespec(vp, &vap->va_atime);
189 vap->va_mtime.tv_sec = ip->i_d.di_mtime.t_sec;
190 vap->va_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
191 vap->va_ctime.tv_sec = ip->i_d.di_ctime.t_sec;
192 vap->va_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
195 * Exit for stat callers. See if any of the rest of the fields
196 * to be filled in are needed.
199 (XFS_AT_XFLAGS|XFS_AT_EXTSIZE|XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS|
200 XFS_AT_GENCOUNT|XFS_AT_VCODE)) == 0)
204 * Convert di_flags to xflags.
206 vap->va_xflags = xfs_ip2xflags(ip);
209 * Exit for inode revalidate. See if any of the rest of
210 * the fields to be filled in are needed.
213 (XFS_AT_EXTSIZE|XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS|
214 XFS_AT_GENCOUNT|XFS_AT_VCODE)) == 0)
217 vap->va_extsize = ip->i_d.di_extsize << mp->m_sb.sb_blocklog;
219 (ip->i_df.if_flags & XFS_IFEXTENTS) ?
220 ip->i_df.if_bytes / sizeof(xfs_bmbt_rec_t) :
224 (ip->i_afp->if_flags & XFS_IFEXTENTS) ?
225 ip->i_afp->if_bytes / sizeof(xfs_bmbt_rec_t) :
226 ip->i_d.di_anextents;
228 vap->va_anextents = 0;
229 vap->va_gen = ip->i_d.di_gen;
232 if (!(flags & ATTR_LAZY))
233 xfs_iunlock(ip, XFS_ILOCK_SHARED);
259 xfs_prid_t projid=0, iprojid=0;
260 int mandlock_before, mandlock_after;
261 struct xfs_dquot *udqp, *gdqp, *olddquot1, *olddquot2;
265 vp = BHV_TO_VNODE(bdp);
266 vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
268 if (vp->v_vfsp->vfs_flag & VFS_RDONLY)
269 return XFS_ERROR(EROFS);
272 * Cannot set certain attributes.
275 if (mask & XFS_AT_NOSET) {
276 return XFS_ERROR(EINVAL);
279 ip = XFS_BHVTOI(bdp);
282 if (XFS_FORCED_SHUTDOWN(mp))
283 return XFS_ERROR(EIO);
286 * Timestamps do not need to be logged and hence do not
287 * need to be done within a transaction.
289 if (mask & XFS_AT_UPDTIMES) {
290 ASSERT((mask & ~XFS_AT_UPDTIMES) == 0);
291 timeflags = ((mask & XFS_AT_UPDATIME) ? XFS_ICHGTIME_ACC : 0) |
292 ((mask & XFS_AT_UPDCTIME) ? XFS_ICHGTIME_CHG : 0) |
293 ((mask & XFS_AT_UPDMTIME) ? XFS_ICHGTIME_MOD : 0);
294 xfs_ichgtime(ip, timeflags);
298 olddquot1 = olddquot2 = NULL;
302 * If disk quotas is on, we make sure that the dquots do exist on disk,
303 * before we start any other transactions. Trying to do this later
304 * is messy. We don't care to take a readlock to look at the ids
305 * in inode here, because we can't hold it across the trans_reserve.
306 * If the IDs do change before we take the ilock, we're covered
307 * because the i_*dquot fields will get updated anyway.
309 if (XFS_IS_QUOTA_ON(mp) &&
310 (mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_PROJID))) {
313 if ((mask & XFS_AT_UID) && XFS_IS_UQUOTA_ON(mp)) {
315 qflags |= XFS_QMOPT_UQUOTA;
317 uid = ip->i_d.di_uid;
319 if ((mask & XFS_AT_GID) && XFS_IS_GQUOTA_ON(mp)) {
321 qflags |= XFS_QMOPT_GQUOTA;
323 gid = ip->i_d.di_gid;
325 if ((mask & XFS_AT_PROJID) && XFS_IS_PQUOTA_ON(mp)) {
326 projid = vap->va_projid;
327 qflags |= XFS_QMOPT_PQUOTA;
329 projid = ip->i_d.di_projid;
332 * We take a reference when we initialize udqp and gdqp,
333 * so it is important that we never blindly double trip on
334 * the same variable. See xfs_create() for an example.
336 ASSERT(udqp == NULL);
337 ASSERT(gdqp == NULL);
338 code = XFS_QM_DQVOPALLOC(mp, ip, uid, gid, projid, qflags,
345 * For the other attributes, we acquire the inode lock and
346 * first do an error checking pass.
349 lock_flags = XFS_ILOCK_EXCL;
350 ASSERT(flags & ATTR_NOLOCK ? flags & ATTR_DMI : 1);
351 if (flags & ATTR_NOLOCK)
353 if (!(mask & XFS_AT_SIZE)) {
354 if ((mask != (XFS_AT_CTIME|XFS_AT_ATIME|XFS_AT_MTIME)) ||
355 (mp->m_flags & XFS_MOUNT_WSYNC)) {
356 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
358 if ((code = xfs_trans_reserve(tp, 0,
359 XFS_ICHANGE_LOG_RES(mp), 0,
366 if (DM_EVENT_ENABLED (vp->v_vfsp, ip, DM_EVENT_TRUNCATE) &&
367 !(flags & ATTR_DMI)) {
368 int dmflags = AT_DELAY_FLAG(flags) | DM_SEM_FLAG_WR;
369 code = XFS_SEND_DATA(mp, DM_EVENT_TRUNCATE, vp,
370 vap->va_size, 0, dmflags, NULL);
377 lock_flags |= XFS_IOLOCK_EXCL;
380 xfs_ilock(ip, lock_flags);
382 /* boolean: are we the file owner? */
383 file_owner = (current_fsuid(credp) == ip->i_d.di_uid);
386 * Change various properties of a file.
387 * Only the owner or users with CAP_FOWNER
388 * capability may do these things.
391 (XFS_AT_MODE|XFS_AT_XFLAGS|XFS_AT_EXTSIZE|XFS_AT_UID|
392 XFS_AT_GID|XFS_AT_PROJID)) {
394 * CAP_FOWNER overrides the following restrictions:
396 * The user ID of the calling process must be equal
397 * to the file owner ID, except in cases where the
398 * CAP_FSETID capability is applicable.
400 if (!file_owner && !capable(CAP_FOWNER)) {
401 code = XFS_ERROR(EPERM);
406 * CAP_FSETID overrides the following restrictions:
408 * The effective user ID of the calling process shall match
409 * the file owner when setting the set-user-ID and
410 * set-group-ID bits on that file.
412 * The effective group ID or one of the supplementary group
413 * IDs of the calling process shall match the group owner of
414 * the file when setting the set-group-ID bit on that file
416 if (mask & XFS_AT_MODE) {
419 if ((vap->va_mode & S_ISUID) && !file_owner)
421 if ((vap->va_mode & S_ISGID) &&
422 !in_group_p((gid_t)ip->i_d.di_gid))
425 /* Linux allows this, Irix doesn't. */
426 if ((vap->va_mode & S_ISVTX) && !VN_ISDIR(vp))
429 if (m && !capable(CAP_FSETID))
435 * Change file ownership. Must be the owner or privileged.
436 * If the system was configured with the "restricted_chown"
437 * option, the owner is not permitted to give away the file,
438 * and can change the group id only to a group of which he
439 * or she is a member.
441 if (mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_PROJID)) {
443 * These IDs could have changed since we last looked at them.
444 * But, we're assured that if the ownership did change
445 * while we didn't have the inode locked, inode's dquot(s)
446 * would have changed also.
448 iuid = ip->i_d.di_uid;
449 iprojid = ip->i_d.di_projid;
450 igid = ip->i_d.di_gid;
451 gid = (mask & XFS_AT_GID) ? vap->va_gid : igid;
452 uid = (mask & XFS_AT_UID) ? vap->va_uid : iuid;
453 projid = (mask & XFS_AT_PROJID) ? (xfs_prid_t)vap->va_projid :
457 * CAP_CHOWN overrides the following restrictions:
459 * If _POSIX_CHOWN_RESTRICTED is defined, this capability
460 * shall override the restriction that a process cannot
461 * change the user ID of a file it owns and the restriction
462 * that the group ID supplied to the chown() function
463 * shall be equal to either the group ID or one of the
464 * supplementary group IDs of the calling process.
466 if (restricted_chown &&
467 (iuid != uid || (igid != gid &&
468 !in_group_p((gid_t)gid))) &&
469 !capable(CAP_CHOWN)) {
470 code = XFS_ERROR(EPERM);
474 * Do a quota reservation only if uid/projid/gid is actually
477 if ((XFS_IS_UQUOTA_ON(mp) && iuid != uid) ||
478 (XFS_IS_PQUOTA_ON(mp) && iprojid != projid) ||
479 (XFS_IS_GQUOTA_ON(mp) && igid != gid)) {
481 code = XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, udqp, gdqp,
482 capable(CAP_FOWNER) ?
483 XFS_QMOPT_FORCE_RES : 0);
484 if (code) /* out of quota */
490 * Truncate file. Must have write permission and not be a directory.
492 if (mask & XFS_AT_SIZE) {
493 /* Short circuit the truncate case for zero length files */
494 if ((vap->va_size == 0) &&
495 (ip->i_d.di_size == 0) && (ip->i_d.di_nextents == 0)) {
496 xfs_iunlock(ip, XFS_ILOCK_EXCL);
497 lock_flags &= ~XFS_ILOCK_EXCL;
498 if (mask & XFS_AT_CTIME)
499 xfs_ichgtime(ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
505 code = XFS_ERROR(EISDIR);
507 } else if (!VN_ISREG(vp)) {
508 code = XFS_ERROR(EINVAL);
512 * Make sure that the dquots are attached to the inode.
514 if ((code = XFS_QM_DQATTACH(mp, ip, XFS_QMOPT_ILOCKED)))
519 * Change file access or modified times.
521 if (mask & (XFS_AT_ATIME|XFS_AT_MTIME)) {
523 if ((flags & ATTR_UTIME) &&
524 !capable(CAP_FOWNER)) {
525 code = XFS_ERROR(EPERM);
532 * Change extent size or realtime flag.
534 if (mask & (XFS_AT_EXTSIZE|XFS_AT_XFLAGS)) {
536 * Can't change extent size if any extents are allocated.
538 if (ip->i_d.di_nextents && (mask & XFS_AT_EXTSIZE) &&
539 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
541 code = XFS_ERROR(EINVAL); /* EFBIG? */
546 * Can't change realtime flag if any extents are allocated.
548 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
549 (mask & XFS_AT_XFLAGS) &&
550 (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) !=
551 (vap->va_xflags & XFS_XFLAG_REALTIME)) {
552 code = XFS_ERROR(EINVAL); /* EFBIG? */
556 * Extent size must be a multiple of the appropriate block
557 * size, if set at all.
559 if ((mask & XFS_AT_EXTSIZE) && vap->va_extsize != 0) {
562 if ((ip->i_d.di_flags & XFS_DIFLAG_REALTIME) ||
563 ((mask & XFS_AT_XFLAGS) &&
564 (vap->va_xflags & XFS_XFLAG_REALTIME))) {
565 size = mp->m_sb.sb_rextsize <<
566 mp->m_sb.sb_blocklog;
568 size = mp->m_sb.sb_blocksize;
570 if (vap->va_extsize % size) {
571 code = XFS_ERROR(EINVAL);
576 * If realtime flag is set then must have realtime data.
578 if ((mask & XFS_AT_XFLAGS) &&
579 (vap->va_xflags & XFS_XFLAG_REALTIME)) {
580 if ((mp->m_sb.sb_rblocks == 0) ||
581 (mp->m_sb.sb_rextsize == 0) ||
582 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
583 code = XFS_ERROR(EINVAL);
589 * Can't modify an immutable/append-only file unless
590 * we have appropriate permission.
592 if ((mask & XFS_AT_XFLAGS) &&
594 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
596 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
597 !capable(CAP_LINUX_IMMUTABLE)) {
598 code = XFS_ERROR(EPERM);
604 * Now we can make the changes. Before we join the inode
605 * to the transaction, if XFS_AT_SIZE is set then take care of
606 * the part of the truncation that must be done without the
607 * inode lock. This needs to be done before joining the inode
608 * to the transaction, because the inode cannot be unlocked
609 * once it is a part of the transaction.
611 if (mask & XFS_AT_SIZE) {
613 if ((vap->va_size > ip->i_d.di_size) &&
614 (flags & ATTR_NOSIZETOK) == 0) {
615 code = xfs_igrow_start(ip, vap->va_size, credp);
617 xfs_iunlock(ip, XFS_ILOCK_EXCL);
619 code = xfs_itruncate_data(ip, vap->va_size);
622 lock_flags &= ~XFS_ILOCK_EXCL;
623 ASSERT(lock_flags == XFS_IOLOCK_EXCL);
626 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE);
627 if ((code = xfs_trans_reserve(tp, 0,
628 XFS_ITRUNCATE_LOG_RES(mp), 0,
629 XFS_TRANS_PERM_LOG_RES,
630 XFS_ITRUNCATE_LOG_COUNT))) {
631 xfs_trans_cancel(tp, 0);
633 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
636 commit_flags = XFS_TRANS_RELEASE_LOG_RES;
637 xfs_ilock(ip, XFS_ILOCK_EXCL);
641 xfs_trans_ijoin(tp, ip, lock_flags);
642 xfs_trans_ihold(tp, ip);
645 /* determine whether mandatory locking mode changes */
646 mandlock_before = MANDLOCK(vp, ip->i_d.di_mode);
649 * Truncate file. Must have write permission and not be a directory.
651 if (mask & XFS_AT_SIZE) {
652 if (vap->va_size > ip->i_d.di_size) {
653 xfs_igrow_finish(tp, ip, vap->va_size,
654 !(flags & ATTR_DMI));
655 } else if ((vap->va_size <= ip->i_d.di_size) ||
656 ((vap->va_size == 0) && ip->i_d.di_nextents)) {
658 * signal a sync transaction unless
659 * we're truncating an already unlinked
660 * file on a wsync filesystem
662 code = xfs_itruncate_finish(&tp, ip,
663 (xfs_fsize_t)vap->va_size,
665 ((ip->i_d.di_nlink != 0 ||
666 !(mp->m_flags & XFS_MOUNT_WSYNC))
673 * Have to do this even if the file's size doesn't change.
675 timeflags |= XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG;
679 * Change file access modes.
681 if (mask & XFS_AT_MODE) {
682 ip->i_d.di_mode &= S_IFMT;
683 ip->i_d.di_mode |= vap->va_mode & ~S_IFMT;
685 xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE);
686 timeflags |= XFS_ICHGTIME_CHG;
690 * Change file ownership. Must be the owner or privileged.
691 * If the system was configured with the "restricted_chown"
692 * option, the owner is not permitted to give away the file,
693 * and can change the group id only to a group of which he
694 * or she is a member.
696 if (mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_PROJID)) {
698 * CAP_FSETID overrides the following restrictions:
700 * The set-user-ID and set-group-ID bits of a file will be
701 * cleared upon successful return from chown()
703 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
704 !capable(CAP_FSETID)) {
705 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
709 * Change the ownerships and register quota modifications
710 * in the transaction.
713 if (XFS_IS_UQUOTA_ON(mp)) {
714 ASSERT(mask & XFS_AT_UID);
716 olddquot1 = XFS_QM_DQVOPCHOWN(mp, tp, ip,
717 &ip->i_udquot, udqp);
719 ip->i_d.di_uid = uid;
722 if (XFS_IS_GQUOTA_ON(mp)) {
723 ASSERT(!XFS_IS_PQUOTA_ON(mp));
724 ASSERT(mask & XFS_AT_GID);
726 olddquot2 = XFS_QM_DQVOPCHOWN(mp, tp, ip,
727 &ip->i_gdquot, gdqp);
729 ip->i_d.di_gid = gid;
731 if (iprojid != projid) {
732 if (XFS_IS_PQUOTA_ON(mp)) {
733 ASSERT(!XFS_IS_GQUOTA_ON(mp));
734 ASSERT(mask & XFS_AT_PROJID);
736 olddquot2 = XFS_QM_DQVOPCHOWN(mp, tp, ip,
737 &ip->i_gdquot, gdqp);
739 ip->i_d.di_projid = projid;
741 * We may have to rev the inode as well as
742 * the superblock version number since projids didn't
743 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
745 if (ip->i_d.di_version == XFS_DINODE_VERSION_1)
746 xfs_bump_ino_vers2(tp, ip);
749 xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE);
750 timeflags |= XFS_ICHGTIME_CHG;
755 * Change file access or modified times.
757 if (mask & (XFS_AT_ATIME|XFS_AT_MTIME)) {
758 if (mask & XFS_AT_ATIME) {
759 ip->i_d.di_atime.t_sec = vap->va_atime.tv_sec;
760 ip->i_d.di_atime.t_nsec = vap->va_atime.tv_nsec;
761 ip->i_update_core = 1;
762 timeflags &= ~XFS_ICHGTIME_ACC;
764 if (mask & XFS_AT_MTIME) {
765 ip->i_d.di_mtime.t_sec = vap->va_mtime.tv_sec;
766 ip->i_d.di_mtime.t_nsec = vap->va_mtime.tv_nsec;
767 timeflags &= ~XFS_ICHGTIME_MOD;
768 timeflags |= XFS_ICHGTIME_CHG;
770 if (tp && (flags & ATTR_UTIME))
771 xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE);
775 * Change XFS-added attributes.
777 if (mask & (XFS_AT_EXTSIZE|XFS_AT_XFLAGS)) {
778 if (mask & XFS_AT_EXTSIZE) {
780 * Converting bytes to fs blocks.
782 ip->i_d.di_extsize = vap->va_extsize >>
783 mp->m_sb.sb_blocklog;
785 if (mask & XFS_AT_XFLAGS) {
788 /* can't set PREALLOC this way, just preserve it */
789 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
790 if (vap->va_xflags & XFS_XFLAG_IMMUTABLE)
791 di_flags |= XFS_DIFLAG_IMMUTABLE;
792 if (vap->va_xflags & XFS_XFLAG_APPEND)
793 di_flags |= XFS_DIFLAG_APPEND;
794 if (vap->va_xflags & XFS_XFLAG_SYNC)
795 di_flags |= XFS_DIFLAG_SYNC;
796 if (vap->va_xflags & XFS_XFLAG_NOATIME)
797 di_flags |= XFS_DIFLAG_NOATIME;
798 if (vap->va_xflags & XFS_XFLAG_NODUMP)
799 di_flags |= XFS_DIFLAG_NODUMP;
800 if (vap->va_xflags & XFS_XFLAG_PROJINHERIT)
801 di_flags |= XFS_DIFLAG_PROJINHERIT;
802 if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
803 if (vap->va_xflags & XFS_XFLAG_RTINHERIT)
804 di_flags |= XFS_DIFLAG_RTINHERIT;
805 if (vap->va_xflags & XFS_XFLAG_NOSYMLINKS)
806 di_flags |= XFS_DIFLAG_NOSYMLINKS;
807 if (vap->va_xflags & XFS_XFLAG_EXTSZINHERIT)
808 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
809 } else if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) {
810 if (vap->va_xflags & XFS_XFLAG_REALTIME) {
811 di_flags |= XFS_DIFLAG_REALTIME;
812 ip->i_iocore.io_flags |= XFS_IOCORE_RT;
814 ip->i_iocore.io_flags &= ~XFS_IOCORE_RT;
816 if (vap->va_xflags & XFS_XFLAG_EXTSIZE)
817 di_flags |= XFS_DIFLAG_EXTSIZE;
819 ip->i_d.di_flags = di_flags;
821 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
822 timeflags |= XFS_ICHGTIME_CHG;
826 * Change file inode change time only if XFS_AT_CTIME set
827 * AND we have been called by a DMI function.
830 if ( (flags & ATTR_DMI) && (mask & XFS_AT_CTIME) ) {
831 ip->i_d.di_ctime.t_sec = vap->va_ctime.tv_sec;
832 ip->i_d.di_ctime.t_nsec = vap->va_ctime.tv_nsec;
833 ip->i_update_core = 1;
834 timeflags &= ~XFS_ICHGTIME_CHG;
838 * Send out timestamp changes that need to be set to the
839 * current time. Not done when called by a DMI function.
841 if (timeflags && !(flags & ATTR_DMI))
842 xfs_ichgtime(ip, timeflags);
844 XFS_STATS_INC(xs_ig_attrchg);
847 * If this is a synchronous mount, make sure that the
848 * transaction goes to disk before returning to the user.
849 * This is slightly sub-optimal in that truncates require
850 * two sync transactions instead of one for wsync filesytems.
851 * One for the truncate and one for the timestamps since we
852 * don't want to change the timestamps unless we're sure the
853 * truncate worked. Truncates are less than 1% of the laddis
854 * mix so this probably isn't worth the trouble to optimize.
858 if (mp->m_flags & XFS_MOUNT_WSYNC)
859 xfs_trans_set_sync(tp);
861 code = xfs_trans_commit(tp, commit_flags, NULL);
865 * If the (regular) file's mandatory locking mode changed, then
866 * notify the vnode. We do this under the inode lock to prevent
867 * racing calls to vop_vnode_change.
869 mandlock_after = MANDLOCK(vp, ip->i_d.di_mode);
870 if (mandlock_before != mandlock_after) {
871 VOP_VNODE_CHANGE(vp, VCHANGE_FLAGS_ENF_LOCKING,
875 xfs_iunlock(ip, lock_flags);
878 * Release any dquot(s) the inode had kept before chown.
880 XFS_QM_DQRELE(mp, olddquot1);
881 XFS_QM_DQRELE(mp, olddquot2);
882 XFS_QM_DQRELE(mp, udqp);
883 XFS_QM_DQRELE(mp, gdqp);
889 if (DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_ATTRIBUTE) &&
890 !(flags & ATTR_DMI)) {
891 (void) XFS_SEND_NAMESP(mp, DM_EVENT_ATTRIBUTE, vp, DM_RIGHT_NULL,
892 NULL, DM_RIGHT_NULL, NULL, NULL,
893 0, 0, AT_DELAY_FLAG(flags));
898 commit_flags |= XFS_TRANS_ABORT;
901 XFS_QM_DQRELE(mp, udqp);
902 XFS_QM_DQRELE(mp, gdqp);
904 xfs_trans_cancel(tp, commit_flags);
906 if (lock_flags != 0) {
907 xfs_iunlock(ip, lock_flags);
915 * Null conversion from vnode mode bits to inode mode bits, as in efs.
926 vn_trace_entry(BHV_TO_VNODE(bdp), __FUNCTION__,
927 (inst_t *)__return_address);
929 ip = XFS_BHVTOI(bdp);
930 xfs_ilock(ip, XFS_ILOCK_SHARED);
931 error = xfs_iaccess(ip, mode, credp);
932 xfs_iunlock(ip, XFS_ILOCK_SHARED);
956 xfs_bmbt_irec_t mval[SYMLINK_MAPS];
962 vp = BHV_TO_VNODE(bdp);
963 vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
965 ip = XFS_BHVTOI(bdp);
968 if (XFS_FORCED_SHUTDOWN(mp))
969 return XFS_ERROR(EIO);
971 xfs_ilock(ip, XFS_ILOCK_SHARED);
973 ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFLNK);
975 offset = uiop->uio_offset;
976 count = uiop->uio_resid;
979 error = XFS_ERROR(EINVAL);
988 * See if the symlink is stored inline.
990 pathlen = (int)ip->i_d.di_size;
992 if (ip->i_df.if_flags & XFS_IFINLINE) {
993 error = uio_read(ip->i_df.if_u1.if_data, pathlen, uiop);
997 * Symlink not inline. Call bmap to get it in.
999 nmaps = SYMLINK_MAPS;
1001 error = xfs_bmapi(NULL, ip, 0, XFS_B_TO_FSB(mp, pathlen),
1002 0, NULL, 0, mval, &nmaps, NULL);
1008 for (n = 0; n < nmaps; n++) {
1009 d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock);
1010 byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount);
1011 bp = xfs_buf_read(mp->m_ddev_targp, d,
1012 BTOBB(byte_cnt), 0);
1013 error = XFS_BUF_GETERROR(bp);
1015 xfs_ioerror_alert("xfs_readlink",
1016 ip->i_mount, bp, XFS_BUF_ADDR(bp));
1020 if (pathlen < byte_cnt)
1022 pathlen -= byte_cnt;
1024 error = uio_read(XFS_BUF_PTR(bp), byte_cnt, uiop);
1033 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1042 * This is called to sync the inode and its data out to disk.
1043 * We need to hold the I/O lock while flushing the data, and
1044 * the inode lock while flushing the inode. The inode lock CANNOT
1045 * be held while flushing the data, so acquire after we're done
1059 int log_flushed = 0, changed = 1;
1061 vn_trace_entry(BHV_TO_VNODE(bdp),
1062 __FUNCTION__, (inst_t *)__return_address);
1064 ip = XFS_BHVTOI(bdp);
1066 ASSERT(start >= 0 && stop >= -1);
1068 if (XFS_FORCED_SHUTDOWN(ip->i_mount))
1069 return XFS_ERROR(EIO);
1072 * We always need to make sure that the required inode state
1073 * is safe on disk. The vnode might be clean but because
1074 * of committed transactions that haven't hit the disk yet.
1075 * Likewise, there could be unflushed non-transactional
1076 * changes to the inode core that have to go to disk.
1078 * The following code depends on one assumption: that
1079 * any transaction that changes an inode logs the core
1080 * because it has to change some field in the inode core
1081 * (typically nextents or nblocks). That assumption
1082 * implies that any transactions against an inode will
1083 * catch any non-transactional updates. If inode-altering
1084 * transactions exist that violate this assumption, the
1085 * code breaks. Right now, it figures that if the involved
1086 * update_* field is clear and the inode is unpinned, the
1087 * inode is clean. Either it's been flushed or it's been
1088 * committed and the commit has hit the disk unpinning the inode.
1089 * (Note that xfs_inode_item_format() called at commit clears
1090 * the update_* fields.)
1092 xfs_ilock(ip, XFS_ILOCK_SHARED);
1094 /* If we are flushing data then we care about update_size
1095 * being set, otherwise we care about update_core
1097 if ((flag & FSYNC_DATA) ?
1098 (ip->i_update_size == 0) :
1099 (ip->i_update_core == 0)) {
1101 * Timestamps/size haven't changed since last inode
1102 * flush or inode transaction commit. That means
1103 * either nothing got written or a transaction
1104 * committed which caught the updates. If the
1105 * latter happened and the transaction hasn't
1106 * hit the disk yet, the inode will be still
1107 * be pinned. If it is, force the log.
1110 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1112 if (xfs_ipincount(ip)) {
1113 _xfs_log_force(ip->i_mount, (xfs_lsn_t)0,
1115 ((flag & FSYNC_WAIT)
1116 ? XFS_LOG_SYNC : 0),
1120 * If the inode is not pinned and nothing
1121 * has changed we don't need to flush the
1129 * Kick off a transaction to log the inode
1130 * core to get the updates. Make it
1131 * sync if FSYNC_WAIT is passed in (which
1132 * is done by everybody but specfs). The
1133 * sync transaction will also force the log.
1135 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1136 tp = xfs_trans_alloc(ip->i_mount, XFS_TRANS_FSYNC_TS);
1137 if ((error = xfs_trans_reserve(tp, 0,
1138 XFS_FSYNC_TS_LOG_RES(ip->i_mount),
1140 xfs_trans_cancel(tp, 0);
1143 xfs_ilock(ip, XFS_ILOCK_EXCL);
1146 * Note - it's possible that we might have pushed
1147 * ourselves out of the way during trans_reserve
1148 * which would flush the inode. But there's no
1149 * guarantee that the inode buffer has actually
1150 * gone out yet (it's delwri). Plus the buffer
1151 * could be pinned anyway if it's part of an
1152 * inode in another recent transaction. So we
1153 * play it safe and fire off the transaction anyway.
1155 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1156 xfs_trans_ihold(tp, ip);
1157 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1158 if (flag & FSYNC_WAIT)
1159 xfs_trans_set_sync(tp);
1160 error = _xfs_trans_commit(tp, 0, NULL, &log_flushed);
1162 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1165 if ((ip->i_mount->m_flags & XFS_MOUNT_BARRIER) && changed) {
1167 * If the log write didn't issue an ordered tag we need
1168 * to flush the disk cache for the data device now.
1171 xfs_blkdev_issue_flush(ip->i_mount->m_ddev_targp);
1174 * If this inode is on the RT dev we need to flush that
1177 if (ip->i_d.di_flags & XFS_DIFLAG_REALTIME)
1178 xfs_blkdev_issue_flush(ip->i_mount->m_rtdev_targp);
1185 * This is called by xfs_inactive to free any blocks beyond eof,
1186 * when the link count isn't zero.
1189 xfs_inactive_free_eofblocks(
1195 xfs_fileoff_t end_fsb;
1196 xfs_fileoff_t last_fsb;
1197 xfs_filblks_t map_len;
1199 xfs_bmbt_irec_t imap;
1202 * Figure out if there are any blocks beyond the end
1203 * of the file. If not, then there is nothing to do.
1205 end_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)ip->i_d.di_size));
1206 last_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp));
1207 map_len = last_fsb - end_fsb;
1212 xfs_ilock(ip, XFS_ILOCK_SHARED);
1213 error = xfs_bmapi(NULL, ip, end_fsb, map_len, 0,
1214 NULL, 0, &imap, &nimaps, NULL);
1215 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1217 if (!error && (nimaps != 0) &&
1218 (imap.br_startblock != HOLESTARTBLOCK ||
1219 ip->i_delayed_blks)) {
1221 * Attach the dquots to the inode up front.
1223 if ((error = XFS_QM_DQATTACH(mp, ip, 0)))
1227 * There are blocks after the end of file.
1228 * Free them up now by truncating the file to
1231 tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE);
1234 * Do the xfs_itruncate_start() call before
1235 * reserving any log space because
1236 * itruncate_start will call into the buffer
1237 * cache and we can't
1238 * do that within a transaction.
1240 xfs_ilock(ip, XFS_IOLOCK_EXCL);
1241 xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE,
1244 error = xfs_trans_reserve(tp, 0,
1245 XFS_ITRUNCATE_LOG_RES(mp),
1246 0, XFS_TRANS_PERM_LOG_RES,
1247 XFS_ITRUNCATE_LOG_COUNT);
1249 ASSERT(XFS_FORCED_SHUTDOWN(mp));
1250 xfs_trans_cancel(tp, 0);
1251 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
1255 xfs_ilock(ip, XFS_ILOCK_EXCL);
1256 xfs_trans_ijoin(tp, ip,
1259 xfs_trans_ihold(tp, ip);
1261 error = xfs_itruncate_finish(&tp, ip,
1266 * If we get an error at this point we
1267 * simply don't bother truncating the file.
1270 xfs_trans_cancel(tp,
1271 (XFS_TRANS_RELEASE_LOG_RES |
1274 error = xfs_trans_commit(tp,
1275 XFS_TRANS_RELEASE_LOG_RES,
1278 xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
1284 * Free a symlink that has blocks associated with it.
1287 xfs_inactive_symlink_rmt(
1295 xfs_fsblock_t first_block;
1296 xfs_bmap_free_t free_list;
1299 xfs_bmbt_irec_t mval[SYMLINK_MAPS];
1307 ASSERT(ip->i_d.di_size > XFS_IFORK_DSIZE(ip));
1309 * We're freeing a symlink that has some
1310 * blocks allocated to it. Free the
1311 * blocks here. We know that we've got
1312 * either 1 or 2 extents and that we can
1313 * free them all in one bunmapi call.
1315 ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2);
1316 if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0,
1317 XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) {
1318 ASSERT(XFS_FORCED_SHUTDOWN(mp));
1319 xfs_trans_cancel(tp, 0);
1324 * Lock the inode, fix the size, and join it to the transaction.
1325 * Hold it so in the normal path, we still have it locked for
1326 * the second transaction. In the error paths we need it
1327 * held so the cancel won't rele it, see below.
1329 xfs_ilock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
1330 size = (int)ip->i_d.di_size;
1331 ip->i_d.di_size = 0;
1332 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
1333 xfs_trans_ihold(tp, ip);
1334 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1336 * Find the block(s) so we can inval and unmap them.
1339 XFS_BMAP_INIT(&free_list, &first_block);
1340 nmaps = sizeof(mval) / sizeof(mval[0]);
1341 if ((error = xfs_bmapi(tp, ip, 0, XFS_B_TO_FSB(mp, size),
1342 XFS_BMAPI_METADATA, &first_block, 0, mval, &nmaps,
1346 * Invalidate the block(s).
1348 for (i = 0; i < nmaps; i++) {
1349 bp = xfs_trans_get_buf(tp, mp->m_ddev_targp,
1350 XFS_FSB_TO_DADDR(mp, mval[i].br_startblock),
1351 XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0);
1352 xfs_trans_binval(tp, bp);
1355 * Unmap the dead block(s) to the free_list.
1357 if ((error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps,
1358 &first_block, &free_list, &done)))
1362 * Commit the first transaction. This logs the EFI and the inode.
1364 if ((error = xfs_bmap_finish(&tp, &free_list, first_block, &committed)))
1367 * The transaction must have been committed, since there were
1368 * actually extents freed by xfs_bunmapi. See xfs_bmap_finish.
1369 * The new tp has the extent freeing and EFDs.
1373 * The first xact was committed, so add the inode to the new one.
1374 * Mark it dirty so it will be logged and moved forward in the log as
1375 * part of every commit.
1377 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
1378 xfs_trans_ihold(tp, ip);
1379 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1381 * Get a new, empty transaction to return to our caller.
1383 ntp = xfs_trans_dup(tp);
1385 * Commit the transaction containing extent freeing and EFD's.
1386 * If we get an error on the commit here or on the reserve below,
1387 * we need to unlock the inode since the new transaction doesn't
1388 * have the inode attached.
1390 error = xfs_trans_commit(tp, 0, NULL);
1393 ASSERT(XFS_FORCED_SHUTDOWN(mp));
1397 * Remove the memory for extent descriptions (just bookkeeping).
1399 if (ip->i_df.if_bytes)
1400 xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK);
1401 ASSERT(ip->i_df.if_bytes == 0);
1403 * Put an itruncate log reservation in the new transaction
1406 if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0,
1407 XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) {
1408 ASSERT(XFS_FORCED_SHUTDOWN(mp));
1412 * Return with the inode locked but not joined to the transaction.
1418 xfs_bmap_cancel(&free_list);
1421 * Have to come here with the inode locked and either
1422 * (held and in the transaction) or (not in the transaction).
1423 * If the inode isn't held then cancel would iput it, but
1424 * that's wrong since this is inactive and the vnode ref
1425 * count is 0 already.
1426 * Cancel won't do anything to the inode if held, but it still
1427 * needs to be locked until the cancel is done, if it was
1428 * joined to the transaction.
1430 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
1431 xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
1438 xfs_inactive_symlink_local(
1444 ASSERT(ip->i_d.di_size <= XFS_IFORK_DSIZE(ip));
1446 * We're freeing a symlink which fit into
1447 * the inode. Just free the memory used
1448 * to hold the old symlink.
1450 error = xfs_trans_reserve(*tpp, 0,
1451 XFS_ITRUNCATE_LOG_RES(ip->i_mount),
1452 0, XFS_TRANS_PERM_LOG_RES,
1453 XFS_ITRUNCATE_LOG_COUNT);
1456 xfs_trans_cancel(*tpp, 0);
1460 xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
1463 * Zero length symlinks _can_ exist.
1465 if (ip->i_df.if_bytes > 0) {
1466 xfs_idata_realloc(ip,
1467 -(ip->i_df.if_bytes),
1469 ASSERT(ip->i_df.if_bytes == 0);
1486 ASSERT(ismrlocked(&ip->i_iolock, MR_UPDATE));
1489 ASSERT(ip->i_d.di_forkoff != 0);
1490 xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
1491 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1493 error = xfs_attr_inactive(ip);
1496 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
1497 return (error); /* goto out*/
1500 tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE);
1501 error = xfs_trans_reserve(tp, 0,
1502 XFS_IFREE_LOG_RES(mp),
1503 0, XFS_TRANS_PERM_LOG_RES,
1504 XFS_INACTIVE_LOG_COUNT);
1506 ASSERT(XFS_FORCED_SHUTDOWN(mp));
1507 xfs_trans_cancel(tp, 0);
1509 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
1513 xfs_ilock(ip, XFS_ILOCK_EXCL);
1514 xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
1515 xfs_trans_ihold(tp, ip);
1516 xfs_idestroy_fork(ip, XFS_ATTR_FORK);
1518 ASSERT(ip->i_d.di_anextents == 0);
1533 vp = BHV_TO_VNODE(bdp);
1534 ip = XFS_BHVTOI(bdp);
1536 if (!VN_ISREG(vp) || (ip->i_d.di_mode == 0)) {
1540 /* If this is a read-only mount, don't do this (would generate I/O) */
1541 if (vp->v_vfsp->vfs_flag & VFS_RDONLY)
1544 #ifdef HAVE_REFCACHE
1545 /* If we are in the NFS reference cache then don't do this now */
1552 if (ip->i_d.di_nlink != 0) {
1553 if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) &&
1554 ((ip->i_d.di_size > 0) || (VN_CACHED(vp) > 0 ||
1555 ip->i_delayed_blks > 0)) &&
1556 (ip->i_df.if_flags & XFS_IFEXTENTS)) &&
1557 (!(ip->i_d.di_flags &
1558 (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) {
1559 if ((error = xfs_inactive_free_eofblocks(mp, ip)))
1561 /* Update linux inode block count after free above */
1562 LINVFS_GET_IP(vp)->i_blocks = XFS_FSB_TO_BB(mp,
1563 ip->i_d.di_nblocks + ip->i_delayed_blks);
1573 * This is called when the vnode reference count for the vnode
1574 * goes to zero. If the file has been unlinked, then it must
1575 * now be truncated. Also, we clear all of the read-ahead state
1576 * kept for the inode here since the file is now closed.
1585 xfs_bmap_free_t free_list;
1586 xfs_fsblock_t first_block;
1593 vp = BHV_TO_VNODE(bdp);
1594 vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
1596 ip = XFS_BHVTOI(bdp);
1599 * If the inode is already free, then there can be nothing
1602 if (ip->i_d.di_mode == 0 || VN_BAD(vp)) {
1603 ASSERT(ip->i_df.if_real_bytes == 0);
1604 ASSERT(ip->i_df.if_broot_bytes == 0);
1605 return VN_INACTIVE_CACHE;
1609 * Only do a truncate if it's a regular file with
1610 * some actual space in it. It's OK to look at the
1611 * inode's fields without the lock because we're the
1612 * only one with a reference to the inode.
1614 truncate = ((ip->i_d.di_nlink == 0) &&
1615 ((ip->i_d.di_size != 0) || (ip->i_d.di_nextents > 0) ||
1616 (ip->i_delayed_blks > 0)) &&
1617 ((ip->i_d.di_mode & S_IFMT) == S_IFREG));
1621 if (ip->i_d.di_nlink == 0 &&
1622 DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_DESTROY)) {
1623 (void) XFS_SEND_DESTROY(mp, vp, DM_RIGHT_NULL);
1628 /* If this is a read-only mount, don't do this (would generate I/O) */
1629 if (vp->v_vfsp->vfs_flag & VFS_RDONLY)
1632 if (ip->i_d.di_nlink != 0) {
1633 if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) &&
1634 ((ip->i_d.di_size > 0) || (VN_CACHED(vp) > 0 ||
1635 ip->i_delayed_blks > 0)) &&
1636 (ip->i_df.if_flags & XFS_IFEXTENTS) &&
1637 (!(ip->i_d.di_flags &
1638 (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)) ||
1639 (ip->i_delayed_blks != 0)))) {
1640 if ((error = xfs_inactive_free_eofblocks(mp, ip)))
1641 return (VN_INACTIVE_CACHE);
1642 /* Update linux inode block count after free above */
1643 LINVFS_GET_IP(vp)->i_blocks = XFS_FSB_TO_BB(mp,
1644 ip->i_d.di_nblocks + ip->i_delayed_blks);
1649 ASSERT(ip->i_d.di_nlink == 0);
1651 if ((error = XFS_QM_DQATTACH(mp, ip, 0)))
1652 return (VN_INACTIVE_CACHE);
1654 tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE);
1657 * Do the xfs_itruncate_start() call before
1658 * reserving any log space because itruncate_start
1659 * will call into the buffer cache and we can't
1660 * do that within a transaction.
1662 xfs_ilock(ip, XFS_IOLOCK_EXCL);
1664 xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE, 0);
1666 error = xfs_trans_reserve(tp, 0,
1667 XFS_ITRUNCATE_LOG_RES(mp),
1668 0, XFS_TRANS_PERM_LOG_RES,
1669 XFS_ITRUNCATE_LOG_COUNT);
1671 /* Don't call itruncate_cleanup */
1672 ASSERT(XFS_FORCED_SHUTDOWN(mp));
1673 xfs_trans_cancel(tp, 0);
1674 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
1675 return (VN_INACTIVE_CACHE);
1678 xfs_ilock(ip, XFS_ILOCK_EXCL);
1679 xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
1680 xfs_trans_ihold(tp, ip);
1683 * normally, we have to run xfs_itruncate_finish sync.
1684 * But if filesystem is wsync and we're in the inactive
1685 * path, then we know that nlink == 0, and that the
1686 * xaction that made nlink == 0 is permanently committed
1687 * since xfs_remove runs as a synchronous transaction.
1689 error = xfs_itruncate_finish(&tp, ip, 0, XFS_DATA_FORK,
1690 (!(mp->m_flags & XFS_MOUNT_WSYNC) ? 1 : 0));
1693 xfs_trans_cancel(tp,
1694 XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
1695 xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
1696 return (VN_INACTIVE_CACHE);
1698 } else if ((ip->i_d.di_mode & S_IFMT) == S_IFLNK) {
1701 * If we get an error while cleaning up a
1702 * symlink we bail out.
1704 error = (ip->i_d.di_size > XFS_IFORK_DSIZE(ip)) ?
1705 xfs_inactive_symlink_rmt(ip, &tp) :
1706 xfs_inactive_symlink_local(ip, &tp);
1710 return (VN_INACTIVE_CACHE);
1713 xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
1714 xfs_trans_ihold(tp, ip);
1716 error = xfs_trans_reserve(tp, 0,
1717 XFS_IFREE_LOG_RES(mp),
1718 0, XFS_TRANS_PERM_LOG_RES,
1719 XFS_INACTIVE_LOG_COUNT);
1721 ASSERT(XFS_FORCED_SHUTDOWN(mp));
1722 xfs_trans_cancel(tp, 0);
1723 return (VN_INACTIVE_CACHE);
1726 xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
1727 xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
1728 xfs_trans_ihold(tp, ip);
1732 * If there are attributes associated with the file
1733 * then blow them away now. The code calls a routine
1734 * that recursively deconstructs the attribute fork.
1735 * We need to just commit the current transaction
1736 * because we can't use it for xfs_attr_inactive().
1738 if (ip->i_d.di_anextents > 0) {
1739 error = xfs_inactive_attrs(ip, &tp);
1741 * If we got an error, the transaction is already
1742 * cancelled, and the inode is unlocked. Just get out.
1745 return (VN_INACTIVE_CACHE);
1746 } else if (ip->i_afp) {
1747 xfs_idestroy_fork(ip, XFS_ATTR_FORK);
1753 XFS_BMAP_INIT(&free_list, &first_block);
1754 error = xfs_ifree(tp, ip, &free_list);
1757 * If we fail to free the inode, shut down. The cancel
1758 * might do that, we need to make sure. Otherwise the
1759 * inode might be lost for a long time or forever.
1761 if (!XFS_FORCED_SHUTDOWN(mp)) {
1763 "xfs_inactive: xfs_ifree() returned an error = %d on %s",
1764 error, mp->m_fsname);
1765 xfs_force_shutdown(mp, XFS_METADATA_IO_ERROR);
1767 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT);
1770 * Credit the quota account(s). The inode is gone.
1772 XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_ICOUNT, -1);
1775 * Just ignore errors at this point. There is
1776 * nothing we can do except to try to keep going.
1778 (void) xfs_bmap_finish(&tp, &free_list, first_block,
1780 (void) xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
1783 * Release the dquots held by inode, if any.
1785 XFS_QM_DQDETACH(mp, ip);
1787 xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
1790 return VN_INACTIVE_CACHE;
1799 bhv_desc_t *dir_bdp,
1806 xfs_inode_t *dp, *ip;
1812 dir_vp = BHV_TO_VNODE(dir_bdp);
1813 vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address);
1815 dp = XFS_BHVTOI(dir_bdp);
1817 if (XFS_FORCED_SHUTDOWN(dp->i_mount))
1818 return XFS_ERROR(EIO);
1820 lock_mode = xfs_ilock_map_shared(dp);
1821 error = xfs_dir_lookup_int(dir_bdp, lock_mode, dentry, &e_inum, &ip);
1823 *vpp = XFS_ITOV(ip);
1826 xfs_iunlock_map_shared(dp, lock_mode);
1832 * xfs_create (create a new file).
1836 bhv_desc_t *dir_bdp,
1842 char *name = VNAME(dentry);
1844 xfs_inode_t *dp, *ip;
1850 xfs_bmap_free_t free_list;
1851 xfs_fsblock_t first_block;
1852 boolean_t dp_joined_to_trans;
1853 int dm_event_sent = 0;
1857 struct xfs_dquot *udqp, *gdqp;
1863 dir_vp = BHV_TO_VNODE(dir_bdp);
1864 vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address);
1866 dp = XFS_BHVTOI(dir_bdp);
1869 dm_di_mode = vap->va_mode;
1870 namelen = VNAMELEN(dentry);
1872 if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_CREATE)) {
1873 error = XFS_SEND_NAMESP(mp, DM_EVENT_CREATE,
1874 dir_vp, DM_RIGHT_NULL, NULL,
1875 DM_RIGHT_NULL, name, NULL,
1883 if (XFS_FORCED_SHUTDOWN(mp))
1884 return XFS_ERROR(EIO);
1886 /* Return through std_return after this point. */
1889 if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)
1890 prid = dp->i_d.di_projid;
1891 else if (vap->va_mask & XFS_AT_PROJID)
1892 prid = (xfs_prid_t)vap->va_projid;
1894 prid = (xfs_prid_t)dfltprid;
1897 * Make sure that we have allocated dquot(s) on disk.
1899 error = XFS_QM_DQVOPALLOC(mp, dp,
1900 current_fsuid(credp), current_fsgid(credp), prid,
1901 XFS_QMOPT_QUOTALL|XFS_QMOPT_INHERIT, &udqp, &gdqp);
1906 dp_joined_to_trans = B_FALSE;
1908 tp = xfs_trans_alloc(mp, XFS_TRANS_CREATE);
1909 cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
1910 resblks = XFS_CREATE_SPACE_RES(mp, namelen);
1912 * Initially assume that the file does not exist and
1913 * reserve the resources for that case. If that is not
1914 * the case we'll drop the one we have and get a more
1915 * appropriate transaction later.
1917 error = xfs_trans_reserve(tp, resblks, XFS_CREATE_LOG_RES(mp), 0,
1918 XFS_TRANS_PERM_LOG_RES, XFS_CREATE_LOG_COUNT);
1919 if (error == ENOSPC) {
1921 error = xfs_trans_reserve(tp, 0, XFS_CREATE_LOG_RES(mp), 0,
1922 XFS_TRANS_PERM_LOG_RES, XFS_CREATE_LOG_COUNT);
1930 xfs_ilock(dp, XFS_ILOCK_EXCL);
1932 XFS_BMAP_INIT(&free_list, &first_block);
1937 * Reserve disk quota and the inode.
1939 error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0);
1944 (error = XFS_DIR_CANENTER(mp, tp, dp, name, namelen)))
1946 rdev = (vap->va_mask & XFS_AT_RDEV) ? vap->va_rdev : 0;
1947 error = xfs_dir_ialloc(&tp, dp, vap->va_mode, 1,
1948 rdev, credp, prid, resblks > 0,
1951 if (error == ENOSPC)
1958 * At this point, we've gotten a newly allocated inode.
1959 * It is locked (and joined to the transaction).
1962 ASSERT(ismrlocked (&ip->i_lock, MR_UPDATE));
1965 * Now we join the directory inode to the transaction.
1966 * We do not do it earlier because xfs_dir_ialloc
1967 * might commit the previous transaction (and release
1972 xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
1973 dp_joined_to_trans = B_TRUE;
1975 error = XFS_DIR_CREATENAME(mp, tp, dp, name, namelen, ip->i_ino,
1976 &first_block, &free_list,
1977 resblks ? resblks - XFS_IALLOC_SPACE_RES(mp) : 0);
1979 ASSERT(error != ENOSPC);
1982 xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
1983 xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
1986 * If this is a synchronous mount, make sure that the
1987 * create transaction goes to disk before returning to
1990 if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) {
1991 xfs_trans_set_sync(tp);
1997 * Attach the dquot(s) to the inodes and modify them incore.
1998 * These ids of the inode couldn't have changed since the new
1999 * inode has been locked ever since it was created.
2001 XFS_QM_DQVOPCREATE(mp, tp, ip, udqp, gdqp);
2004 * xfs_trans_commit normally decrements the vnode ref count
2005 * when it unlocks the inode. Since we want to return the
2006 * vnode to the caller, we bump the vnode ref count now.
2011 error = xfs_bmap_finish(&tp, &free_list, first_block, &committed);
2013 xfs_bmap_cancel(&free_list);
2017 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
2024 XFS_QM_DQRELE(mp, udqp);
2025 XFS_QM_DQRELE(mp, gdqp);
2028 * Propogate the fact that the vnode changed after the
2029 * xfs_inode locks have been released.
2031 VOP_VNODE_CHANGE(vp, VCHANGE_FLAGS_TRUNCATED, 3);
2035 /* Fallthrough to std_return with error = 0 */
2038 if ( (*vpp || (error != 0 && dm_event_sent != 0)) &&
2039 DM_EVENT_ENABLED(dir_vp->v_vfsp, XFS_BHVTOI(dir_bdp),
2040 DM_EVENT_POSTCREATE)) {
2041 (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTCREATE,
2042 dir_vp, DM_RIGHT_NULL,
2044 DM_RIGHT_NULL, name, NULL,
2045 dm_di_mode, error, 0);
2050 cancel_flags |= XFS_TRANS_ABORT;
2055 xfs_trans_cancel(tp, cancel_flags);
2057 if (!dp_joined_to_trans && (dp != NULL))
2058 xfs_iunlock(dp, XFS_ILOCK_EXCL);
2059 XFS_QM_DQRELE(mp, udqp);
2060 XFS_QM_DQRELE(mp, gdqp);
2066 * Wait until after the current transaction is aborted to
2067 * release the inode. This prevents recursive transactions
2068 * and deadlocks from xfs_inactive.
2070 cancel_flags |= XFS_TRANS_ABORT;
2071 xfs_trans_cancel(tp, cancel_flags);
2074 XFS_QM_DQRELE(mp, udqp);
2075 XFS_QM_DQRELE(mp, gdqp);
2082 * Some counters to see if (and how often) we are hitting some deadlock
2083 * prevention code paths.
2087 int xfs_rm_lock_delays;
2088 int xfs_rm_attempts;
2092 * The following routine will lock the inodes associated with the
2093 * directory and the named entry in the directory. The locks are
2094 * acquired in increasing inode number.
2096 * If the entry is "..", then only the directory is locked. The
2097 * vnode ref count will still include that from the .. entry in
2100 * There is a deadlock we need to worry about. If the locked directory is
2101 * in the AIL, it might be blocking up the log. The next inode we lock
2102 * could be already locked by another thread waiting for log space (e.g
2103 * a permanent log reservation with a long running transaction (see
2104 * xfs_itruncate_finish)). To solve this, we must check if the directory
2105 * is in the ail and use lock_nowait. If we can't lock, we need to
2106 * drop the inode lock on the directory and try again. xfs_iunlock will
2107 * potentially push the tail if we were holding up the log.
2110 xfs_lock_dir_and_entry(
2113 xfs_inode_t *ip) /* inode of entry 'name' */
2117 xfs_inode_t *ips[2];
2126 xfs_ilock(dp, XFS_ILOCK_EXCL);
2133 * We want to lock in increasing inum. Since we've already
2134 * acquired the lock on the directory, we may need to release
2135 * if if the inum of the entry turns out to be less.
2137 if (e_inum > dp->i_ino) {
2139 * We are already in the right order, so just
2140 * lock on the inode of the entry.
2141 * We need to use nowait if dp is in the AIL.
2144 lp = (xfs_log_item_t *)dp->i_itemp;
2145 if (lp && (lp->li_flags & XFS_LI_IN_AIL)) {
2146 if (!xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) {
2153 * Unlock dp and try again.
2154 * xfs_iunlock will try to push the tail
2155 * if the inode is in the AIL.
2158 xfs_iunlock(dp, XFS_ILOCK_EXCL);
2160 if ((attempts % 5) == 0) {
2161 delay(1); /* Don't just spin the CPU */
2163 xfs_rm_lock_delays++;
2169 xfs_ilock(ip, XFS_ILOCK_EXCL);
2171 } else if (e_inum < dp->i_ino) {
2172 xfs_iunlock(dp, XFS_ILOCK_EXCL);
2176 xfs_lock_inodes(ips, 2, 0, XFS_ILOCK_EXCL);
2178 /* else e_inum == dp->i_ino */
2179 /* This can happen if we're asked to lock /x/..
2180 * the entry is "..", which is also the parent directory.
2188 int xfs_small_retries;
2189 int xfs_middle_retries;
2190 int xfs_lots_retries;
2191 int xfs_lock_delays;
2195 * The following routine will lock n inodes in exclusive mode.
2196 * We assume the caller calls us with the inodes in i_ino order.
2198 * We need to detect deadlock where an inode that we lock
2199 * is in the AIL and we start waiting for another inode that is locked
2200 * by a thread in a long running transaction (such as truncate). This can
2201 * result in deadlock since the long running trans might need to wait
2202 * for the inode we just locked in order to push the tail and free space
2212 int attempts = 0, i, j, try_lock;
2215 ASSERT(ips && (inodes >= 2)); /* we need at least two */
2226 for (; i < inodes; i++) {
2229 if (i && (ips[i] == ips[i-1])) /* Already locked */
2233 * If try_lock is not set yet, make sure all locked inodes
2234 * are not in the AIL.
2235 * If any are, set try_lock to be used later.
2239 for (j = (i - 1); j >= 0 && !try_lock; j--) {
2240 lp = (xfs_log_item_t *)ips[j]->i_itemp;
2241 if (lp && (lp->li_flags & XFS_LI_IN_AIL)) {
2248 * If any of the previous locks we have locked is in the AIL,
2249 * we must TRY to get the second and subsequent locks. If
2250 * we can't get any, we must release all we have
2255 /* try_lock must be 0 if i is 0. */
2257 * try_lock means we have an inode locked
2258 * that is in the AIL.
2261 if (!xfs_ilock_nowait(ips[i], lock_mode)) {
2265 * Unlock all previous guys and try again.
2266 * xfs_iunlock will try to push the tail
2267 * if the inode is in the AIL.
2270 for(j = i - 1; j >= 0; j--) {
2273 * Check to see if we've already
2274 * unlocked this one.
2275 * Not the first one going back,
2276 * and the inode ptr is the same.
2278 if ((j != (i - 1)) && ips[j] ==
2282 xfs_iunlock(ips[j], lock_mode);
2285 if ((attempts % 5) == 0) {
2286 delay(1); /* Don't just spin the CPU */
2296 xfs_ilock(ips[i], lock_mode);
2302 if (attempts < 5) xfs_small_retries++;
2303 else if (attempts < 100) xfs_middle_retries++;
2304 else xfs_lots_retries++;
2312 #define REMOVE_DEBUG_TRACE(x) {remove_which_error_return = (x);}
2313 int remove_which_error_return = 0;
2315 #define REMOVE_DEBUG_TRACE(x)
2316 #endif /* ! DEBUG */
2325 bhv_desc_t *dir_bdp,
2330 char *name = VNAME(dentry);
2331 xfs_inode_t *dp, *ip;
2332 xfs_trans_t *tp = NULL;
2335 xfs_bmap_free_t free_list;
2336 xfs_fsblock_t first_block;
2344 dir_vp = BHV_TO_VNODE(dir_bdp);
2345 vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address);
2347 dp = XFS_BHVTOI(dir_bdp);
2350 if (XFS_FORCED_SHUTDOWN(mp))
2351 return XFS_ERROR(EIO);
2353 namelen = VNAMELEN(dentry);
2355 if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_REMOVE)) {
2356 error = XFS_SEND_NAMESP(mp, DM_EVENT_REMOVE, dir_vp,
2357 DM_RIGHT_NULL, NULL, DM_RIGHT_NULL,
2358 name, NULL, 0, 0, 0);
2363 /* From this point on, return through std_return */
2367 * We need to get a reference to ip before we get our log
2368 * reservation. The reason for this is that we cannot call
2369 * xfs_iget for an inode for which we do not have a reference
2370 * once we've acquired a log reservation. This is because the
2371 * inode we are trying to get might be in xfs_inactive going
2372 * for a log reservation. Since we'll have to wait for the
2373 * inactive code to complete before returning from xfs_iget,
2374 * we need to make sure that we don't have log space reserved
2375 * when we call xfs_iget. Instead we get an unlocked referece
2376 * to the inode before getting our log reservation.
2378 error = xfs_get_dir_entry(dentry, &ip);
2380 REMOVE_DEBUG_TRACE(__LINE__);
2384 dm_di_mode = ip->i_d.di_mode;
2386 vn_trace_entry(XFS_ITOV(ip), __FUNCTION__, (inst_t *)__return_address);
2390 error = XFS_QM_DQATTACH(mp, dp, 0);
2391 if (!error && dp != ip)
2392 error = XFS_QM_DQATTACH(mp, ip, 0);
2394 REMOVE_DEBUG_TRACE(__LINE__);
2399 tp = xfs_trans_alloc(mp, XFS_TRANS_REMOVE);
2400 cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
2402 * We try to get the real space reservation first,
2403 * allowing for directory btree deletion(s) implying
2404 * possible bmap insert(s). If we can't get the space
2405 * reservation then we use 0 instead, and avoid the bmap
2406 * btree insert(s) in the directory code by, if the bmap
2407 * insert tries to happen, instead trimming the LAST
2408 * block from the directory.
2410 resblks = XFS_REMOVE_SPACE_RES(mp);
2411 error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0,
2412 XFS_TRANS_PERM_LOG_RES, XFS_REMOVE_LOG_COUNT);
2413 if (error == ENOSPC) {
2415 error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0,
2416 XFS_TRANS_PERM_LOG_RES, XFS_REMOVE_LOG_COUNT);
2419 ASSERT(error != ENOSPC);
2420 REMOVE_DEBUG_TRACE(__LINE__);
2421 xfs_trans_cancel(tp, 0);
2426 error = xfs_lock_dir_and_entry(dp, dentry, ip);
2428 REMOVE_DEBUG_TRACE(__LINE__);
2429 xfs_trans_cancel(tp, cancel_flags);
2435 * At this point, we've gotten both the directory and the entry
2438 xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
2441 * Increment vnode ref count only in this case since
2442 * there's an extra vnode reference in the case where
2446 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
2450 * Entry must exist since we did a lookup in xfs_lock_dir_and_entry.
2452 XFS_BMAP_INIT(&free_list, &first_block);
2453 error = XFS_DIR_REMOVENAME(mp, tp, dp, name, namelen, ip->i_ino,
2454 &first_block, &free_list, 0);
2456 ASSERT(error != ENOENT);
2457 REMOVE_DEBUG_TRACE(__LINE__);
2460 xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
2463 xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
2465 error = xfs_droplink(tp, ip);
2467 REMOVE_DEBUG_TRACE(__LINE__);
2471 /* Determine if this is the last link while
2472 * we are in the transaction.
2474 link_zero = (ip)->i_d.di_nlink==0;
2477 * Take an extra ref on the inode so that it doesn't
2478 * go to xfs_inactive() from within the commit.
2483 * If this is a synchronous mount, make sure that the
2484 * remove transaction goes to disk before returning to
2487 if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) {
2488 xfs_trans_set_sync(tp);
2491 error = xfs_bmap_finish(&tp, &free_list, first_block, &committed);
2493 REMOVE_DEBUG_TRACE(__LINE__);
2497 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
2504 * Before we drop our extra reference to the inode, purge it
2505 * from the refcache if it is there. By waiting until afterwards
2506 * to do the IRELE, we ensure that we won't go inactive in the
2507 * xfs_refcache_purge_ip routine (although that would be OK).
2509 xfs_refcache_purge_ip(ip);
2511 vn_trace_exit(XFS_ITOV(ip), __FUNCTION__, (inst_t *)__return_address);
2514 * Let interposed file systems know about removed links.
2516 VOP_LINK_REMOVED(XFS_ITOV(ip), dir_vp, link_zero);
2520 /* Fall through to std_return with error = 0 */
2522 if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp,
2523 DM_EVENT_POSTREMOVE)) {
2524 (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTREMOVE,
2525 dir_vp, DM_RIGHT_NULL,
2526 NULL, DM_RIGHT_NULL,
2527 name, NULL, dm_di_mode, error, 0);
2532 xfs_bmap_cancel(&free_list);
2533 cancel_flags |= XFS_TRANS_ABORT;
2534 xfs_trans_cancel(tp, cancel_flags);
2539 * In this case make sure to not release the inode until after
2540 * the current transaction is aborted. Releasing it beforehand
2541 * can cause us to go to xfs_inactive and start a recursive
2542 * transaction which can easily deadlock with the current one.
2544 xfs_bmap_cancel(&free_list);
2545 cancel_flags |= XFS_TRANS_ABORT;
2546 xfs_trans_cancel(tp, cancel_flags);
2549 * Before we drop our extra reference to the inode, purge it
2550 * from the refcache if it is there. By waiting until afterwards
2551 * to do the IRELE, we ensure that we won't go inactive in the
2552 * xfs_refcache_purge_ip routine (although that would be OK).
2554 xfs_refcache_purge_ip(ip);
2568 bhv_desc_t *target_dir_bdp,
2573 xfs_inode_t *tdp, *sip;
2576 xfs_inode_t *ips[2];
2578 xfs_bmap_free_t free_list;
2579 xfs_fsblock_t first_block;
2582 vnode_t *target_dir_vp;
2584 char *target_name = VNAME(dentry);
2587 target_dir_vp = BHV_TO_VNODE(target_dir_bdp);
2588 vn_trace_entry(target_dir_vp, __FUNCTION__, (inst_t *)__return_address);
2589 vn_trace_entry(src_vp, __FUNCTION__, (inst_t *)__return_address);
2591 target_namelen = VNAMELEN(dentry);
2592 if (VN_ISDIR(src_vp))
2593 return XFS_ERROR(EPERM);
2595 sip = xfs_vtoi(src_vp);
2596 tdp = XFS_BHVTOI(target_dir_bdp);
2598 if (XFS_FORCED_SHUTDOWN(mp))
2599 return XFS_ERROR(EIO);
2601 if (DM_EVENT_ENABLED(src_vp->v_vfsp, tdp, DM_EVENT_LINK)) {
2602 error = XFS_SEND_NAMESP(mp, DM_EVENT_LINK,
2603 target_dir_vp, DM_RIGHT_NULL,
2604 src_vp, DM_RIGHT_NULL,
2605 target_name, NULL, 0, 0, 0);
2610 /* Return through std_return after this point. */
2612 error = XFS_QM_DQATTACH(mp, sip, 0);
2613 if (!error && sip != tdp)
2614 error = XFS_QM_DQATTACH(mp, tdp, 0);
2618 tp = xfs_trans_alloc(mp, XFS_TRANS_LINK);
2619 cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
2620 resblks = XFS_LINK_SPACE_RES(mp, target_namelen);
2621 error = xfs_trans_reserve(tp, resblks, XFS_LINK_LOG_RES(mp), 0,
2622 XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT);
2623 if (error == ENOSPC) {
2625 error = xfs_trans_reserve(tp, 0, XFS_LINK_LOG_RES(mp), 0,
2626 XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT);
2633 if (sip->i_ino < tdp->i_ino) {
2641 xfs_lock_inodes(ips, 2, 0, XFS_ILOCK_EXCL);
2644 * Increment vnode ref counts since xfs_trans_commit &
2645 * xfs_trans_cancel will both unlock the inodes and
2646 * decrement the associated ref counts.
2649 VN_HOLD(target_dir_vp);
2650 xfs_trans_ijoin(tp, sip, XFS_ILOCK_EXCL);
2651 xfs_trans_ijoin(tp, tdp, XFS_ILOCK_EXCL);
2654 * If the source has too many links, we can't make any more to it.
2656 if (sip->i_d.di_nlink >= XFS_MAXLINK) {
2657 error = XFS_ERROR(EMLINK);
2662 * If we are using project inheritance, we only allow hard link
2663 * creation in our tree when the project IDs are the same; else
2664 * the tree quota mechanism could be circumvented.
2666 if (unlikely((tdp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&
2667 (tdp->i_d.di_projid != sip->i_d.di_projid))) {
2668 error = XFS_ERROR(EPERM);
2673 (error = XFS_DIR_CANENTER(mp, tp, tdp, target_name,
2677 XFS_BMAP_INIT(&free_list, &first_block);
2679 error = XFS_DIR_CREATENAME(mp, tp, tdp, target_name, target_namelen,
2680 sip->i_ino, &first_block, &free_list,
2684 xfs_ichgtime(tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
2686 xfs_trans_log_inode(tp, tdp, XFS_ILOG_CORE);
2688 error = xfs_bumplink(tp, sip);
2694 * If this is a synchronous mount, make sure that the
2695 * link transaction goes to disk before returning to
2698 if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) {
2699 xfs_trans_set_sync(tp);
2702 error = xfs_bmap_finish (&tp, &free_list, first_block, &committed);
2704 xfs_bmap_cancel(&free_list);
2708 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
2713 /* Fall through to std_return with error = 0. */
2715 if (DM_EVENT_ENABLED(src_vp->v_vfsp, sip,
2716 DM_EVENT_POSTLINK)) {
2717 (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTLINK,
2718 target_dir_vp, DM_RIGHT_NULL,
2719 src_vp, DM_RIGHT_NULL,
2720 target_name, NULL, 0, error, 0);
2725 cancel_flags |= XFS_TRANS_ABORT;
2728 xfs_trans_cancel(tp, cancel_flags);
2738 bhv_desc_t *dir_bdp,
2744 char *dir_name = VNAME(dentry);
2746 xfs_inode_t *cdp; /* inode of created dir */
2747 vnode_t *cvp; /* vnode of created dir */
2753 xfs_bmap_free_t free_list;
2754 xfs_fsblock_t first_block;
2756 boolean_t dp_joined_to_trans;
2757 boolean_t created = B_FALSE;
2758 int dm_event_sent = 0;
2760 struct xfs_dquot *udqp, *gdqp;
2765 dir_vp = BHV_TO_VNODE(dir_bdp);
2766 dp = XFS_BHVTOI(dir_bdp);
2769 if (XFS_FORCED_SHUTDOWN(mp))
2770 return XFS_ERROR(EIO);
2772 dir_namelen = VNAMELEN(dentry);
2775 dp_joined_to_trans = B_FALSE;
2776 dm_di_mode = vap->va_mode;
2778 if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_CREATE)) {
2779 error = XFS_SEND_NAMESP(mp, DM_EVENT_CREATE,
2780 dir_vp, DM_RIGHT_NULL, NULL,
2781 DM_RIGHT_NULL, dir_name, NULL,
2788 /* Return through std_return after this point. */
2790 vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address);
2794 if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)
2795 prid = dp->i_d.di_projid;
2796 else if (vap->va_mask & XFS_AT_PROJID)
2797 prid = (xfs_prid_t)vap->va_projid;
2799 prid = (xfs_prid_t)dfltprid;
2802 * Make sure that we have allocated dquot(s) on disk.
2804 error = XFS_QM_DQVOPALLOC(mp, dp,
2805 current_fsuid(credp), current_fsgid(credp), prid,
2806 XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp);
2810 tp = xfs_trans_alloc(mp, XFS_TRANS_MKDIR);
2811 cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
2812 resblks = XFS_MKDIR_SPACE_RES(mp, dir_namelen);
2813 error = xfs_trans_reserve(tp, resblks, XFS_MKDIR_LOG_RES(mp), 0,
2814 XFS_TRANS_PERM_LOG_RES, XFS_MKDIR_LOG_COUNT);
2815 if (error == ENOSPC) {
2817 error = xfs_trans_reserve(tp, 0, XFS_MKDIR_LOG_RES(mp), 0,
2818 XFS_TRANS_PERM_LOG_RES,
2819 XFS_MKDIR_LOG_COUNT);
2827 xfs_ilock(dp, XFS_ILOCK_EXCL);
2830 * Check for directory link count overflow.
2832 if (dp->i_d.di_nlink >= XFS_MAXLINK) {
2833 error = XFS_ERROR(EMLINK);
2838 * Reserve disk quota and the inode.
2840 error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0);
2845 (error = XFS_DIR_CANENTER(mp, tp, dp, dir_name, dir_namelen)))
2848 * create the directory inode.
2850 error = xfs_dir_ialloc(&tp, dp, vap->va_mode, 2,
2851 0, credp, prid, resblks > 0,
2854 if (error == ENOSPC)
2861 * Now we add the directory inode to the transaction.
2862 * We waited until now since xfs_dir_ialloc might start
2863 * a new transaction. Had we joined the transaction
2864 * earlier, the locks might have gotten released.
2867 xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
2868 dp_joined_to_trans = B_TRUE;
2870 XFS_BMAP_INIT(&free_list, &first_block);
2872 error = XFS_DIR_CREATENAME(mp, tp, dp, dir_name, dir_namelen,
2873 cdp->i_ino, &first_block, &free_list,
2874 resblks ? resblks - XFS_IALLOC_SPACE_RES(mp) : 0);
2876 ASSERT(error != ENOSPC);
2879 xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
2882 * Bump the in memory version number of the parent directory
2883 * so that other processes accessing it will recognize that
2884 * the directory has changed.
2888 error = XFS_DIR_INIT(mp, tp, cdp, dp);
2894 error = xfs_bumplink(tp, dp);
2899 cvp = XFS_ITOV(cdp);
2907 * Attach the dquots to the new inode and modify the icount incore.
2909 XFS_QM_DQVOPCREATE(mp, tp, cdp, udqp, gdqp);
2912 * If this is a synchronous mount, make sure that the
2913 * mkdir transaction goes to disk before returning to
2916 if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) {
2917 xfs_trans_set_sync(tp);
2920 error = xfs_bmap_finish(&tp, &free_list, first_block, &committed);
2926 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
2927 XFS_QM_DQRELE(mp, udqp);
2928 XFS_QM_DQRELE(mp, gdqp);
2933 /* Fall through to std_return with error = 0 or errno from
2934 * xfs_trans_commit. */
2937 if ( (created || (error != 0 && dm_event_sent != 0)) &&
2938 DM_EVENT_ENABLED(dir_vp->v_vfsp, XFS_BHVTOI(dir_bdp),
2939 DM_EVENT_POSTCREATE)) {
2940 (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTCREATE,
2941 dir_vp, DM_RIGHT_NULL,
2942 created ? XFS_ITOV(cdp):NULL,
2945 dm_di_mode, error, 0);
2951 xfs_bmap_cancel(&free_list);
2953 cancel_flags |= XFS_TRANS_ABORT;
2955 xfs_trans_cancel(tp, cancel_flags);
2956 XFS_QM_DQRELE(mp, udqp);
2957 XFS_QM_DQRELE(mp, gdqp);
2959 if (!dp_joined_to_trans && (dp != NULL)) {
2960 xfs_iunlock(dp, XFS_ILOCK_EXCL);
2973 bhv_desc_t *dir_bdp,
2977 char *name = VNAME(dentry);
2979 xfs_inode_t *cdp; /* child directory */
2983 xfs_bmap_free_t free_list;
2984 xfs_fsblock_t first_block;
2993 dir_vp = BHV_TO_VNODE(dir_bdp);
2994 dp = XFS_BHVTOI(dir_bdp);
2997 vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address);
2999 if (XFS_FORCED_SHUTDOWN(XFS_BHVTOI(dir_bdp)->i_mount))
3000 return XFS_ERROR(EIO);
3001 namelen = VNAMELEN(dentry);
3003 if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_REMOVE)) {
3004 error = XFS_SEND_NAMESP(mp, DM_EVENT_REMOVE,
3005 dir_vp, DM_RIGHT_NULL,
3006 NULL, DM_RIGHT_NULL,
3007 name, NULL, 0, 0, 0);
3009 return XFS_ERROR(error);
3012 /* Return through std_return after this point. */
3017 * We need to get a reference to cdp before we get our log
3018 * reservation. The reason for this is that we cannot call
3019 * xfs_iget for an inode for which we do not have a reference
3020 * once we've acquired a log reservation. This is because the
3021 * inode we are trying to get might be in xfs_inactive going
3022 * for a log reservation. Since we'll have to wait for the
3023 * inactive code to complete before returning from xfs_iget,
3024 * we need to make sure that we don't have log space reserved
3025 * when we call xfs_iget. Instead we get an unlocked referece
3026 * to the inode before getting our log reservation.
3028 error = xfs_get_dir_entry(dentry, &cdp);
3030 REMOVE_DEBUG_TRACE(__LINE__);
3034 dm_di_mode = cdp->i_d.di_mode;
3037 * Get the dquots for the inodes.
3039 error = XFS_QM_DQATTACH(mp, dp, 0);
3040 if (!error && dp != cdp)
3041 error = XFS_QM_DQATTACH(mp, cdp, 0);
3044 REMOVE_DEBUG_TRACE(__LINE__);
3048 tp = xfs_trans_alloc(mp, XFS_TRANS_RMDIR);
3049 cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
3051 * We try to get the real space reservation first,
3052 * allowing for directory btree deletion(s) implying
3053 * possible bmap insert(s). If we can't get the space
3054 * reservation then we use 0 instead, and avoid the bmap
3055 * btree insert(s) in the directory code by, if the bmap
3056 * insert tries to happen, instead trimming the LAST
3057 * block from the directory.
3059 resblks = XFS_REMOVE_SPACE_RES(mp);
3060 error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0,
3061 XFS_TRANS_PERM_LOG_RES, XFS_DEFAULT_LOG_COUNT);
3062 if (error == ENOSPC) {
3064 error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0,
3065 XFS_TRANS_PERM_LOG_RES, XFS_DEFAULT_LOG_COUNT);
3068 ASSERT(error != ENOSPC);
3073 XFS_BMAP_INIT(&free_list, &first_block);
3076 * Now lock the child directory inode and the parent directory
3077 * inode in the proper order. This will take care of validating
3078 * that the directory entry for the child directory inode has
3079 * not changed while we were obtaining a log reservation.
3081 error = xfs_lock_dir_and_entry(dp, dentry, cdp);
3083 xfs_trans_cancel(tp, cancel_flags);
3088 xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
3091 * Only increment the parent directory vnode count if
3092 * we didn't bump it in looking up cdp. The only time
3093 * we don't bump it is when we're looking up ".".
3099 xfs_trans_ijoin(tp, cdp, XFS_ILOCK_EXCL);
3101 ASSERT(cdp->i_d.di_nlink >= 2);
3102 if (cdp->i_d.di_nlink != 2) {
3103 error = XFS_ERROR(ENOTEMPTY);
3106 if (!XFS_DIR_ISEMPTY(mp, cdp)) {
3107 error = XFS_ERROR(ENOTEMPTY);
3111 error = XFS_DIR_REMOVENAME(mp, tp, dp, name, namelen, cdp->i_ino,
3112 &first_block, &free_list, resblks);
3117 xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
3120 * Bump the in memory generation count on the parent
3121 * directory so that other can know that it has changed.
3126 * Drop the link from cdp's "..".
3128 error = xfs_droplink(tp, dp);
3134 * Drop the link from dp to cdp.
3136 error = xfs_droplink(tp, cdp);
3142 * Drop the "." link from cdp to self.
3144 error = xfs_droplink(tp, cdp);
3149 /* Determine these before committing transaction */
3150 last_cdp_link = (cdp)->i_d.di_nlink==0;
3153 * Take an extra ref on the child vnode so that it
3154 * does not go to xfs_inactive() from within the commit.
3159 * If this is a synchronous mount, make sure that the
3160 * rmdir transaction goes to disk before returning to
3163 if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) {
3164 xfs_trans_set_sync(tp);
3167 error = xfs_bmap_finish (&tp, &free_list, first_block, &committed);
3169 xfs_bmap_cancel(&free_list);
3170 xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES |
3176 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
3184 * Let interposed file systems know about removed links.
3186 VOP_LINK_REMOVED(XFS_ITOV(cdp), dir_vp, last_cdp_link);
3190 /* Fall through to std_return with error = 0 or the errno
3191 * from xfs_trans_commit. */
3193 if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_POSTREMOVE)) {
3194 (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTREMOVE,
3195 dir_vp, DM_RIGHT_NULL,
3196 NULL, DM_RIGHT_NULL,
3197 name, NULL, dm_di_mode,
3203 xfs_bmap_cancel(&free_list);
3204 cancel_flags |= XFS_TRANS_ABORT;
3206 xfs_trans_cancel(tp, cancel_flags);
3214 * Read dp's entries starting at uiop->uio_offset and translate them into
3215 * bufsize bytes worth of struct dirents starting at bufbase.
3219 bhv_desc_t *dir_bdp,
3225 xfs_trans_t *tp = NULL;
3229 vn_trace_entry(BHV_TO_VNODE(dir_bdp), __FUNCTION__,
3230 (inst_t *)__return_address);
3231 dp = XFS_BHVTOI(dir_bdp);
3233 if (XFS_FORCED_SHUTDOWN(dp->i_mount)) {
3234 return XFS_ERROR(EIO);
3237 lock_mode = xfs_ilock_map_shared(dp);
3238 error = XFS_DIR_GETDENTS(dp->i_mount, tp, dp, uiop, eofp);
3239 xfs_iunlock_map_shared(dp, lock_mode);
3250 bhv_desc_t *dir_bdp,
3263 xfs_bmap_free_t free_list;
3264 xfs_fsblock_t first_block;
3265 boolean_t dp_joined_to_trans;
3269 xfs_fileoff_t first_fsb;
3270 xfs_filblks_t fs_blocks;
3272 xfs_bmbt_irec_t mval[SYMLINK_MAPS];
3279 struct xfs_dquot *udqp, *gdqp;
3281 char *link_name = VNAME(dentry);
3285 dir_vp = BHV_TO_VNODE(dir_bdp);
3286 dp = XFS_BHVTOI(dir_bdp);
3287 dp_joined_to_trans = B_FALSE;
3292 vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address);
3296 if (XFS_FORCED_SHUTDOWN(mp))
3297 return XFS_ERROR(EIO);
3299 link_namelen = VNAMELEN(dentry);
3302 * Check component lengths of the target path name.
3304 pathlen = strlen(target_path);
3305 if (pathlen >= MAXPATHLEN) /* total string too long */
3306 return XFS_ERROR(ENAMETOOLONG);
3307 if (pathlen >= MAXNAMELEN) { /* is any component too long? */
3311 for(total = 0, path = target_path; total < pathlen;) {
3315 while(*path == '/') {
3321 * Count up to the next slash or end of path.
3322 * Error out if the component is bigger than MAXNAMELEN.
3324 for(len = 0; *path != '/' && total < pathlen;total++, path++) {
3325 if (++len >= MAXNAMELEN) {
3326 error = ENAMETOOLONG;
3333 if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_SYMLINK)) {
3334 error = XFS_SEND_NAMESP(mp, DM_EVENT_SYMLINK, dir_vp,
3335 DM_RIGHT_NULL, NULL, DM_RIGHT_NULL,
3336 link_name, target_path, 0, 0, 0);
3341 /* Return through std_return after this point. */
3344 if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)
3345 prid = dp->i_d.di_projid;
3346 else if (vap->va_mask & XFS_AT_PROJID)
3347 prid = (xfs_prid_t)vap->va_projid;
3349 prid = (xfs_prid_t)dfltprid;
3352 * Make sure that we have allocated dquot(s) on disk.
3354 error = XFS_QM_DQVOPALLOC(mp, dp,
3355 current_fsuid(credp), current_fsgid(credp), prid,
3356 XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp);
3360 tp = xfs_trans_alloc(mp, XFS_TRANS_SYMLINK);
3361 cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
3363 * The symlink will fit into the inode data fork?
3364 * There can't be any attributes so we get the whole variable part.
3366 if (pathlen <= XFS_LITINO(mp))
3369 fs_blocks = XFS_B_TO_FSB(mp, pathlen);
3370 resblks = XFS_SYMLINK_SPACE_RES(mp, link_namelen, fs_blocks);
3371 error = xfs_trans_reserve(tp, resblks, XFS_SYMLINK_LOG_RES(mp), 0,
3372 XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT);
3373 if (error == ENOSPC && fs_blocks == 0) {
3375 error = xfs_trans_reserve(tp, 0, XFS_SYMLINK_LOG_RES(mp), 0,
3376 XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT);
3384 xfs_ilock(dp, XFS_ILOCK_EXCL);
3387 * Check whether the directory allows new symlinks or not.
3389 if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) {
3390 error = XFS_ERROR(EPERM);
3395 * Reserve disk quota : blocks and inode.
3397 error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0);
3402 * Check for ability to enter directory entry, if no space reserved.
3405 (error = XFS_DIR_CANENTER(mp, tp, dp, link_name, link_namelen)))
3408 * Initialize the bmap freelist prior to calling either
3409 * bmapi or the directory create code.
3411 XFS_BMAP_INIT(&free_list, &first_block);
3414 * Allocate an inode for the symlink.
3416 error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (vap->va_mode&~S_IFMT),
3417 1, 0, credp, prid, resblks > 0, &ip, NULL);
3419 if (error == ENOSPC)
3426 xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
3427 dp_joined_to_trans = B_TRUE;
3430 * Also attach the dquot(s) to it, if applicable.
3432 XFS_QM_DQVOPCREATE(mp, tp, ip, udqp, gdqp);
3435 resblks -= XFS_IALLOC_SPACE_RES(mp);
3437 * If the symlink will fit into the inode, write it inline.
3439 if (pathlen <= XFS_IFORK_DSIZE(ip)) {
3440 xfs_idata_realloc(ip, pathlen, XFS_DATA_FORK);
3441 memcpy(ip->i_df.if_u1.if_data, target_path, pathlen);
3442 ip->i_d.di_size = pathlen;
3445 * The inode was initially created in extent format.
3447 ip->i_df.if_flags &= ~(XFS_IFEXTENTS | XFS_IFBROOT);
3448 ip->i_df.if_flags |= XFS_IFINLINE;
3450 ip->i_d.di_format = XFS_DINODE_FMT_LOCAL;
3451 xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE);
3455 nmaps = SYMLINK_MAPS;
3457 error = xfs_bmapi(tp, ip, first_fsb, fs_blocks,
3458 XFS_BMAPI_WRITE | XFS_BMAPI_METADATA,
3459 &first_block, resblks, mval, &nmaps,
3466 resblks -= fs_blocks;
3467 ip->i_d.di_size = pathlen;
3468 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
3470 cur_chunk = target_path;
3471 for (n = 0; n < nmaps; n++) {
3472 d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock);
3473 byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount);
3474 bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d,
3475 BTOBB(byte_cnt), 0);
3476 ASSERT(bp && !XFS_BUF_GETERROR(bp));
3477 if (pathlen < byte_cnt) {
3480 pathlen -= byte_cnt;
3482 memcpy(XFS_BUF_PTR(bp), cur_chunk, byte_cnt);
3483 cur_chunk += byte_cnt;
3485 xfs_trans_log_buf(tp, bp, 0, byte_cnt - 1);
3490 * Create the directory entry for the symlink.
3492 error = XFS_DIR_CREATENAME(mp, tp, dp, link_name, link_namelen,
3493 ip->i_ino, &first_block, &free_list, resblks);
3497 xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
3498 xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
3501 * Bump the in memory version number of the parent directory
3502 * so that other processes accessing it will recognize that
3503 * the directory has changed.
3508 * If this is a synchronous mount, make sure that the
3509 * symlink transaction goes to disk before returning to
3512 if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) {
3513 xfs_trans_set_sync(tp);
3517 * xfs_trans_commit normally decrements the vnode ref count
3518 * when it unlocks the inode. Since we want to return the
3519 * vnode to the caller, we bump the vnode ref count now.
3523 error = xfs_bmap_finish(&tp, &free_list, first_block, &committed);
3527 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
3528 XFS_QM_DQRELE(mp, udqp);
3529 XFS_QM_DQRELE(mp, gdqp);
3531 /* Fall through to std_return with error = 0 or errno from
3532 * xfs_trans_commit */
3534 if (DM_EVENT_ENABLED(dir_vp->v_vfsp, XFS_BHVTOI(dir_bdp),
3535 DM_EVENT_POSTSYMLINK)) {
3536 (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTSYMLINK,
3537 dir_vp, DM_RIGHT_NULL,
3538 error ? NULL : XFS_ITOV(ip),
3539 DM_RIGHT_NULL, link_name, target_path,
3555 xfs_bmap_cancel(&free_list);
3556 cancel_flags |= XFS_TRANS_ABORT;
3558 xfs_trans_cancel(tp, cancel_flags);
3559 XFS_QM_DQRELE(mp, udqp);
3560 XFS_QM_DQRELE(mp, gdqp);
3562 if (!dp_joined_to_trans && (dp != NULL)) {
3563 xfs_iunlock(dp, XFS_ILOCK_EXCL);
3573 * A fid routine that takes a pointer to a previously allocated
3574 * fid structure (like xfs_fast_fid) but uses a 64 bit inode number.
3584 vn_trace_entry(BHV_TO_VNODE(bdp), __FUNCTION__,
3585 (inst_t *)__return_address);
3586 ASSERT(sizeof(fid_t) >= sizeof(xfs_fid2_t));
3588 xfid = (xfs_fid2_t *)fidp;
3589 ip = XFS_BHVTOI(bdp);
3590 xfid->fid_len = sizeof(xfs_fid2_t) - sizeof(xfid->fid_len);
3593 * use memcpy because the inode is a long long and there's no
3594 * assurance that xfid->fid_ino is properly aligned.
3596 memcpy(&xfid->fid_ino, &ip->i_ino, sizeof(xfid->fid_ino));
3597 xfid->fid_gen = ip->i_d.di_gen;
3614 vp = BHV_TO_VNODE(bdp);
3617 ip = XFS_BHVTOI(bdp);
3618 if (locktype == VRWLOCK_WRITE) {
3619 xfs_ilock(ip, XFS_IOLOCK_EXCL);
3620 } else if (locktype == VRWLOCK_TRY_READ) {
3621 return (xfs_ilock_nowait(ip, XFS_IOLOCK_SHARED));
3622 } else if (locktype == VRWLOCK_TRY_WRITE) {
3623 return (xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL));
3625 ASSERT((locktype == VRWLOCK_READ) ||
3626 (locktype == VRWLOCK_WRITE_DIRECT));
3627 xfs_ilock(ip, XFS_IOLOCK_SHARED);
3645 vp = BHV_TO_VNODE(bdp);
3648 ip = XFS_BHVTOI(bdp);
3649 if (locktype == VRWLOCK_WRITE) {
3651 * In the write case, we may have added a new entry to
3652 * the reference cache. This might store a pointer to
3653 * an inode to be released in this inode. If it is there,
3654 * clear the pointer and release the inode after unlocking
3657 xfs_refcache_iunlock(ip, XFS_IOLOCK_EXCL);
3659 ASSERT((locktype == VRWLOCK_READ) ||
3660 (locktype == VRWLOCK_WRITE_DIRECT));
3661 xfs_iunlock(ip, XFS_IOLOCK_SHARED);
3673 xfs_inode_log_item_t *iip;
3676 ip = XFS_BHVTOI(bdp);
3680 if (XFS_FORCED_SHUTDOWN(mp))
3681 return XFS_ERROR(EIO);
3684 * Bypass inodes which have already been cleaned by
3685 * the inode flush clustering code inside xfs_iflush
3687 if ((ip->i_update_core == 0) &&
3688 ((iip == NULL) || !(iip->ili_format.ilf_fields & XFS_ILOG_ALL)))
3691 if (flags & FLUSH_LOG) {
3692 if (iip && iip->ili_last_lsn) {
3693 xlog_t *log = mp->m_log;
3695 int s, log_flags = XFS_LOG_FORCE;
3697 s = GRANT_LOCK(log);
3698 sync_lsn = log->l_last_sync_lsn;
3699 GRANT_UNLOCK(log, s);
3701 if ((XFS_LSN_CMP(iip->ili_last_lsn, sync_lsn) <= 0))
3704 if (flags & FLUSH_SYNC)
3705 log_flags |= XFS_LOG_SYNC;
3706 return xfs_log_force(mp, iip->ili_last_lsn, log_flags);
3711 * We make this non-blocking if the inode is contended,
3712 * return EAGAIN to indicate to the caller that they
3713 * did not succeed. This prevents the flush path from
3714 * blocking on inodes inside another operation right
3715 * now, they get caught later by xfs_sync.
3717 if (flags & FLUSH_INODE) {
3720 if (xfs_ipincount(ip))
3723 if (flags & FLUSH_SYNC) {
3724 xfs_ilock(ip, XFS_ILOCK_SHARED);
3726 } else if (xfs_ilock_nowait(ip, XFS_ILOCK_SHARED)) {
3727 if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip)) {
3728 xfs_iunlock(ip, XFS_ILOCK_SHARED);
3735 if (flags & FLUSH_SYNC)
3736 flush_flags = XFS_IFLUSH_SYNC;
3738 flush_flags = XFS_IFLUSH_ASYNC;
3740 error = xfs_iflush(ip, flush_flags);
3741 xfs_iunlock(ip, XFS_ILOCK_SHARED);
3760 if (!capable(CAP_SYS_ADMIN))
3761 return XFS_ERROR(EPERM);
3763 ip = XFS_BHVTOI(bdp);
3766 if (XFS_FORCED_SHUTDOWN(mp))
3767 return XFS_ERROR(EIO);
3769 tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS);
3770 error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES (mp), 0, 0, 0);
3772 xfs_trans_cancel(tp, 0);
3775 xfs_ilock(ip, XFS_ILOCK_EXCL);
3776 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
3778 ip->i_iocore.io_dmevmask = ip->i_d.di_dmevmask = evmask;
3779 ip->i_iocore.io_dmstate = ip->i_d.di_dmstate = state;
3781 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
3783 error = xfs_trans_commit(tp, 0, NULL);
3799 vp = BHV_TO_VNODE(bdp);
3800 ip = XFS_BHVTOI(bdp);
3802 vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
3804 ASSERT(!VN_MAPPED(vp));
3806 /* bad inode, get out here ASAP */
3814 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0);
3817 * Make sure the atime in the XFS inode is correct before freeing the
3820 xfs_synchronize_atime(ip);
3822 /* If we have nothing to flush with this inode then complete the
3823 * teardown now, otherwise break the link between the xfs inode
3824 * and the linux inode and clean up the xfs inode later. This
3825 * avoids flushing the inode to disk during the delete operation
3828 if (!ip->i_update_core && (ip->i_itemp == NULL)) {
3829 xfs_ilock(ip, XFS_ILOCK_EXCL);
3831 return xfs_finish_reclaim(ip, 1, XFS_IFLUSH_DELWRI_ELSE_SYNC);
3833 xfs_mount_t *mp = ip->i_mount;
3835 /* Protect sync from us */
3836 XFS_MOUNT_ILOCK(mp);
3837 vn_bhv_remove(VN_BHV_HEAD(vp), XFS_ITOBHV(ip));
3838 list_add_tail(&ip->i_reclaim, &mp->m_del_inodes);
3839 ip->i_flags |= XFS_IRECLAIMABLE;
3840 XFS_MOUNT_IUNLOCK(mp);
3851 xfs_ihash_t *ih = ip->i_hash;
3852 vnode_t *vp = XFS_ITOV_NULL(ip);
3855 if (vp && VN_BAD(vp))
3858 /* The hash lock here protects a thread in xfs_iget_core from
3859 * racing with us on linking the inode back with a vnode.
3860 * Once we have the XFS_IRECLAIM flag set it will not touch
3863 write_lock(&ih->ih_lock);
3864 if ((ip->i_flags & XFS_IRECLAIM) ||
3865 (!(ip->i_flags & XFS_IRECLAIMABLE) && vp == NULL)) {
3866 write_unlock(&ih->ih_lock);
3869 xfs_iunlock(ip, XFS_ILOCK_EXCL);
3873 ip->i_flags |= XFS_IRECLAIM;
3874 write_unlock(&ih->ih_lock);
3877 * If the inode is still dirty, then flush it out. If the inode
3878 * is not in the AIL, then it will be OK to flush it delwri as
3879 * long as xfs_iflush() does not keep any references to the inode.
3880 * We leave that decision up to xfs_iflush() since it has the
3881 * knowledge of whether it's OK to simply do a delwri flush of
3882 * the inode or whether we need to wait until the inode is
3883 * pulled from the AIL.
3884 * We get the flush lock regardless, though, just to make sure
3885 * we don't free it while it is being flushed.
3887 if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) {
3889 xfs_ilock(ip, XFS_ILOCK_EXCL);
3893 if (ip->i_update_core ||
3894 ((ip->i_itemp != NULL) &&
3895 (ip->i_itemp->ili_format.ilf_fields != 0))) {
3896 error = xfs_iflush(ip, sync_mode);
3898 * If we hit an error, typically because of filesystem
3899 * shutdown, we don't need to let vn_reclaim to know
3900 * because we're gonna reclaim the inode anyway.
3903 xfs_iunlock(ip, XFS_ILOCK_EXCL);
3906 xfs_iflock(ip); /* synchronize with xfs_iflush_done */
3909 ASSERT(ip->i_update_core == 0);
3910 ASSERT(ip->i_itemp == NULL ||
3911 ip->i_itemp->ili_format.ilf_fields == 0);
3912 xfs_iunlock(ip, XFS_ILOCK_EXCL);
3913 } else if (locked) {
3915 * We are not interested in doing an iflush if we're
3916 * in the process of shutting down the filesystem forcibly.
3917 * So, just reclaim the inode.
3920 xfs_iunlock(ip, XFS_ILOCK_EXCL);
3929 xfs_finish_reclaim_all(xfs_mount_t *mp, int noblock)
3932 xfs_inode_t *ip, *n;
3937 XFS_MOUNT_ILOCK(mp);
3938 list_for_each_entry_safe(ip, n, &mp->m_del_inodes, i_reclaim) {
3940 if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0)
3942 if (xfs_ipincount(ip) ||
3943 !xfs_iflock_nowait(ip)) {
3944 xfs_iunlock(ip, XFS_ILOCK_EXCL);
3948 XFS_MOUNT_IUNLOCK(mp);
3949 if (xfs_finish_reclaim(ip, noblock,
3950 XFS_IFLUSH_DELWRI_ELSE_ASYNC))
3959 XFS_MOUNT_IUNLOCK(mp);
3964 * xfs_alloc_file_space()
3965 * This routine allocates disk space for the given file.
3967 * If alloc_type == 0, this request is for an ALLOCSP type
3968 * request which will change the file size. In this case, no
3969 * DMAPI event will be generated by the call. A TRUNCATE event
3970 * will be generated later by xfs_setattr.
3972 * If alloc_type != 0, this request is for a RESVSP type
3973 * request, and a DMAPI DM_EVENT_WRITE will be generated if the
3974 * lower block boundary byte address is less than the file's
3983 xfs_alloc_file_space(
3990 xfs_mount_t *mp = ip->i_mount;
3992 xfs_filblks_t allocated_fsb;
3993 xfs_filblks_t allocatesize_fsb;
3994 xfs_extlen_t extsz, temp;
3995 xfs_fileoff_t startoffset_fsb;
3996 xfs_fsblock_t firstfsb;
4002 xfs_bmbt_irec_t imaps[1], *imapp;
4003 xfs_bmap_free_t free_list;
4004 uint qblocks, resblks, resrtextents;
4008 vn_trace_entry(XFS_ITOV(ip), __FUNCTION__, (inst_t *)__return_address);
4010 if (XFS_FORCED_SHUTDOWN(mp))
4011 return XFS_ERROR(EIO);
4013 rt = XFS_IS_REALTIME_INODE(ip);
4015 if (!(extsz = ip->i_d.di_extsize))
4016 extsz = mp->m_sb.sb_rextsize;
4018 extsz = ip->i_d.di_extsize;
4021 if ((error = XFS_QM_DQATTACH(mp, ip, 0)))
4025 return XFS_ERROR(EINVAL);
4031 bmapi_flag = XFS_BMAPI_WRITE | (alloc_type ? XFS_BMAPI_PREALLOC : 0);
4032 startoffset_fsb = XFS_B_TO_FSBT(mp, offset);
4033 allocatesize_fsb = XFS_B_TO_FSB(mp, count);
4035 /* Generate a DMAPI event if needed. */
4036 if (alloc_type != 0 && offset < ip->i_d.di_size &&
4037 (attr_flags&ATTR_DMI) == 0 &&
4038 DM_EVENT_ENABLED(XFS_MTOVFS(mp), ip, DM_EVENT_WRITE)) {
4039 xfs_off_t end_dmi_offset;
4041 end_dmi_offset = offset+len;
4042 if (end_dmi_offset > ip->i_d.di_size)
4043 end_dmi_offset = ip->i_d.di_size;
4044 error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, XFS_ITOV(ip),
4045 offset, end_dmi_offset - offset,
4052 * Allocate file space until done or until there is an error
4055 while (allocatesize_fsb && !error) {
4059 * Determine space reservations for data/realtime.
4061 if (unlikely(extsz)) {
4062 s = startoffset_fsb;
4065 e = startoffset_fsb + allocatesize_fsb;
4066 if ((temp = do_mod(startoffset_fsb, extsz)))
4068 if ((temp = do_mod(e, extsz)))
4072 e = allocatesize_fsb;
4076 resrtextents = qblocks = (uint)(e - s);
4077 resrtextents /= mp->m_sb.sb_rextsize;
4078 resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0);
4079 quota_flag = XFS_QMOPT_RES_RTBLKS;
4082 resblks = qblocks = \
4083 XFS_DIOSTRAT_SPACE_RES(mp, (uint)(e - s));
4084 quota_flag = XFS_QMOPT_RES_REGBLKS;
4088 * Allocate and setup the transaction.
4090 tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT);
4091 error = xfs_trans_reserve(tp, resblks,
4092 XFS_WRITE_LOG_RES(mp), resrtextents,
4093 XFS_TRANS_PERM_LOG_RES,
4094 XFS_WRITE_LOG_COUNT);
4096 * Check for running out of space
4100 * Free the transaction structure.
4102 ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp));
4103 xfs_trans_cancel(tp, 0);
4106 xfs_ilock(ip, XFS_ILOCK_EXCL);
4107 error = XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip,
4108 qblocks, 0, quota_flag);
4112 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
4113 xfs_trans_ihold(tp, ip);
4116 * Issue the xfs_bmapi() call to allocate the blocks
4118 XFS_BMAP_INIT(&free_list, &firstfsb);
4119 error = xfs_bmapi(tp, ip, startoffset_fsb,
4120 allocatesize_fsb, bmapi_flag,
4121 &firstfsb, 0, imapp, &nimaps,
4128 * Complete the transaction
4130 error = xfs_bmap_finish(&tp, &free_list, firstfsb, &committed);
4135 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
4136 xfs_iunlock(ip, XFS_ILOCK_EXCL);
4141 allocated_fsb = imapp->br_blockcount;
4144 error = XFS_ERROR(ENOSPC);
4148 startoffset_fsb += allocated_fsb;
4149 allocatesize_fsb -= allocated_fsb;
4152 if (error == ENOSPC && (attr_flags&ATTR_DMI) == 0 &&
4153 DM_EVENT_ENABLED(XFS_MTOVFS(mp), ip, DM_EVENT_NOSPACE)) {
4155 error = XFS_SEND_NAMESP(mp, DM_EVENT_NOSPACE,
4156 XFS_ITOV(ip), DM_RIGHT_NULL,
4157 XFS_ITOV(ip), DM_RIGHT_NULL,
4158 NULL, NULL, 0, 0, 0); /* Delay flag intentionally unused */
4160 goto retry; /* Maybe DMAPI app. has made space */
4161 /* else fall through with error from XFS_SEND_DATA */
4166 error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */
4167 xfs_bmap_cancel(&free_list);
4168 XFS_TRANS_UNRESERVE_QUOTA_NBLKS(mp, tp, ip, qblocks, 0, quota_flag);
4170 error1: /* Just cancel transaction */
4171 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
4172 xfs_iunlock(ip, XFS_ILOCK_EXCL);
4173 goto dmapi_enospc_check;
4177 * Zero file bytes between startoff and endoff inclusive.
4178 * The iolock is held exclusive and no blocks are buffered.
4181 xfs_zero_remaining_bytes(
4186 xfs_bmbt_irec_t imap;
4187 xfs_fileoff_t offset_fsb;
4188 xfs_off_t lastoffset;
4191 xfs_mount_t *mp = ip->i_mount;
4195 bp = xfs_buf_get_noaddr(mp->m_sb.sb_blocksize,
4196 ip->i_d.di_flags & XFS_DIFLAG_REALTIME ?
4197 mp->m_rtdev_targp : mp->m_ddev_targp);
4199 for (offset = startoff; offset <= endoff; offset = lastoffset + 1) {
4200 offset_fsb = XFS_B_TO_FSBT(mp, offset);
4202 error = xfs_bmapi(NULL, ip, offset_fsb, 1, 0, NULL, 0, &imap,
4204 if (error || nimap < 1)
4206 ASSERT(imap.br_blockcount >= 1);
4207 ASSERT(imap.br_startoff == offset_fsb);
4208 lastoffset = XFS_FSB_TO_B(mp, imap.br_startoff + 1) - 1;
4209 if (lastoffset > endoff)
4210 lastoffset = endoff;
4211 if (imap.br_startblock == HOLESTARTBLOCK)
4213 ASSERT(imap.br_startblock != DELAYSTARTBLOCK);
4214 if (imap.br_state == XFS_EXT_UNWRITTEN)
4217 XFS_BUF_UNWRITE(bp);
4219 XFS_BUF_SET_ADDR(bp, XFS_FSB_TO_DB(ip, imap.br_startblock));
4221 if ((error = xfs_iowait(bp))) {
4222 xfs_ioerror_alert("xfs_zero_remaining_bytes(read)",
4223 mp, bp, XFS_BUF_ADDR(bp));
4226 memset(XFS_BUF_PTR(bp) +
4227 (offset - XFS_FSB_TO_B(mp, imap.br_startoff)),
4228 0, lastoffset - offset + 1);
4233 if ((error = xfs_iowait(bp))) {
4234 xfs_ioerror_alert("xfs_zero_remaining_bytes(write)",
4235 mp, bp, XFS_BUF_ADDR(bp));
4244 * xfs_free_file_space()
4245 * This routine frees disk space for the given file.
4247 * This routine is only called by xfs_change_file_space
4248 * for an UNRESVSP type call.
4256 xfs_free_file_space(
4265 xfs_off_t end_dmi_offset;
4266 xfs_fileoff_t endoffset_fsb;
4268 xfs_fsblock_t firstfsb;
4269 xfs_bmap_free_t free_list;
4271 xfs_bmbt_irec_t imap;
4279 xfs_fileoff_t startoffset_fsb;
4281 int need_iolock = 1;
4286 vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
4288 if ((error = XFS_QM_DQATTACH(mp, ip, 0)))
4292 if (len <= 0) /* if nothing being freed */
4294 rt = (ip->i_d.di_flags & XFS_DIFLAG_REALTIME);
4295 startoffset_fsb = XFS_B_TO_FSB(mp, offset);
4296 end_dmi_offset = offset + len;
4297 endoffset_fsb = XFS_B_TO_FSBT(mp, end_dmi_offset);
4299 if (offset < ip->i_d.di_size &&
4300 (attr_flags & ATTR_DMI) == 0 &&
4301 DM_EVENT_ENABLED(XFS_MTOVFS(mp), ip, DM_EVENT_WRITE)) {
4302 if (end_dmi_offset > ip->i_d.di_size)
4303 end_dmi_offset = ip->i_d.di_size;
4304 error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, vp,
4305 offset, end_dmi_offset - offset,
4306 AT_DELAY_FLAG(attr_flags), NULL);
4311 ASSERT(attr_flags & ATTR_NOLOCK ? attr_flags & ATTR_DMI : 1);
4312 if (attr_flags & ATTR_NOLOCK)
4315 xfs_ilock(ip, XFS_IOLOCK_EXCL);
4317 rounding = MAX((__uint8_t)(1 << mp->m_sb.sb_blocklog),
4319 ilen = len + (offset & (rounding - 1));
4320 ioffset = offset & ~(rounding - 1);
4321 if (ilen & (rounding - 1))
4322 ilen = (ilen + rounding) & ~(rounding - 1);
4324 if (VN_CACHED(vp) != 0) {
4325 xfs_inval_cached_trace(&ip->i_iocore, ioffset, -1,
4326 ctooff(offtoct(ioffset)), -1);
4327 VOP_FLUSHINVAL_PAGES(vp, ctooff(offtoct(ioffset)),
4328 -1, FI_REMAPF_LOCKED);
4332 * Need to zero the stuff we're not freeing, on disk.
4333 * If its a realtime file & can't use unwritten extents then we
4334 * actually need to zero the extent edges. Otherwise xfs_bunmapi
4335 * will take care of it for us.
4337 if (rt && !XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb)) {
4339 error = xfs_bmapi(NULL, ip, startoffset_fsb, 1, 0, NULL, 0,
4340 &imap, &nimap, NULL);
4342 goto out_unlock_iolock;
4343 ASSERT(nimap == 0 || nimap == 1);
4344 if (nimap && imap.br_startblock != HOLESTARTBLOCK) {
4347 ASSERT(imap.br_startblock != DELAYSTARTBLOCK);
4348 block = imap.br_startblock;
4349 mod = do_div(block, mp->m_sb.sb_rextsize);
4351 startoffset_fsb += mp->m_sb.sb_rextsize - mod;
4354 error = xfs_bmapi(NULL, ip, endoffset_fsb - 1, 1, 0, NULL, 0,
4355 &imap, &nimap, NULL);
4357 goto out_unlock_iolock;
4358 ASSERT(nimap == 0 || nimap == 1);
4359 if (nimap && imap.br_startblock != HOLESTARTBLOCK) {
4360 ASSERT(imap.br_startblock != DELAYSTARTBLOCK);
4362 if (mod && (mod != mp->m_sb.sb_rextsize))
4363 endoffset_fsb -= mod;
4366 if ((done = (endoffset_fsb <= startoffset_fsb)))
4368 * One contiguous piece to clear
4370 error = xfs_zero_remaining_bytes(ip, offset, offset + len - 1);
4373 * Some full blocks, possibly two pieces to clear
4375 if (offset < XFS_FSB_TO_B(mp, startoffset_fsb))
4376 error = xfs_zero_remaining_bytes(ip, offset,
4377 XFS_FSB_TO_B(mp, startoffset_fsb) - 1);
4379 XFS_FSB_TO_B(mp, endoffset_fsb) < offset + len)
4380 error = xfs_zero_remaining_bytes(ip,
4381 XFS_FSB_TO_B(mp, endoffset_fsb),
4386 * free file space until done or until there is an error
4388 resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0);
4389 while (!error && !done) {
4392 * allocate and setup the transaction
4394 tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT);
4395 error = xfs_trans_reserve(tp,
4397 XFS_WRITE_LOG_RES(mp),
4399 XFS_TRANS_PERM_LOG_RES,
4400 XFS_WRITE_LOG_COUNT);
4403 * check for running out of space
4407 * Free the transaction structure.
4409 ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp));
4410 xfs_trans_cancel(tp, 0);
4413 xfs_ilock(ip, XFS_ILOCK_EXCL);
4414 error = XFS_TRANS_RESERVE_QUOTA(mp, tp,
4415 ip->i_udquot, ip->i_gdquot, resblks, 0,
4416 XFS_QMOPT_RES_REGBLKS);
4420 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
4421 xfs_trans_ihold(tp, ip);
4424 * issue the bunmapi() call to free the blocks
4426 XFS_BMAP_INIT(&free_list, &firstfsb);
4427 error = xfs_bunmapi(tp, ip, startoffset_fsb,
4428 endoffset_fsb - startoffset_fsb,
4429 0, 2, &firstfsb, &free_list, &done);
4435 * complete the transaction
4437 error = xfs_bmap_finish(&tp, &free_list, firstfsb, &committed);
4442 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
4443 xfs_iunlock(ip, XFS_ILOCK_EXCL);
4448 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
4452 xfs_bmap_cancel(&free_list);
4454 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
4455 xfs_iunlock(ip, need_iolock ? (XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL) :
4461 * xfs_change_file_space()
4462 * This routine allocates or frees disk space for the given file.
4463 * The user specified parameters are checked for alignment and size
4472 xfs_change_file_space(
4486 xfs_off_t startoffset;
4492 vp = BHV_TO_VNODE(bdp);
4493 vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
4495 ip = XFS_BHVTOI(bdp);
4499 * must be a regular file and have write permission
4502 return XFS_ERROR(EINVAL);
4504 xfs_ilock(ip, XFS_ILOCK_SHARED);
4506 if ((error = xfs_iaccess(ip, S_IWUSR, credp))) {
4507 xfs_iunlock(ip, XFS_ILOCK_SHARED);
4511 xfs_iunlock(ip, XFS_ILOCK_SHARED);
4513 switch (bf->l_whence) {
4514 case 0: /*SEEK_SET*/
4516 case 1: /*SEEK_CUR*/
4517 bf->l_start += offset;
4519 case 2: /*SEEK_END*/
4520 bf->l_start += ip->i_d.di_size;
4523 return XFS_ERROR(EINVAL);
4526 llen = bf->l_len > 0 ? bf->l_len - 1 : bf->l_len;
4528 if ( (bf->l_start < 0)
4529 || (bf->l_start > XFS_MAXIOFFSET(mp))
4530 || (bf->l_start + llen < 0)
4531 || (bf->l_start + llen > XFS_MAXIOFFSET(mp)))
4532 return XFS_ERROR(EINVAL);
4536 startoffset = bf->l_start;
4537 fsize = ip->i_d.di_size;
4540 * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve
4542 * These calls do NOT zero the data space allocated to the file,
4543 * nor do they change the file size.
4545 * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file
4547 * These calls cause the new file data to be zeroed and the file
4548 * size to be changed.
4550 setprealloc = clrprealloc = 0;
4553 case XFS_IOC_RESVSP:
4554 case XFS_IOC_RESVSP64:
4555 error = xfs_alloc_file_space(ip, startoffset, bf->l_len,
4562 case XFS_IOC_UNRESVSP:
4563 case XFS_IOC_UNRESVSP64:
4564 if ((error = xfs_free_file_space(ip, startoffset, bf->l_len,
4569 case XFS_IOC_ALLOCSP:
4570 case XFS_IOC_ALLOCSP64:
4571 case XFS_IOC_FREESP:
4572 case XFS_IOC_FREESP64:
4573 if (startoffset > fsize) {
4574 error = xfs_alloc_file_space(ip, fsize,
4575 startoffset - fsize, 0, attr_flags);
4580 va.va_mask = XFS_AT_SIZE;
4581 va.va_size = startoffset;
4583 error = xfs_setattr(bdp, &va, attr_flags, credp);
4593 return XFS_ERROR(EINVAL);
4597 * update the inode timestamp, mode, and prealloc flag bits
4599 tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID);
4601 if ((error = xfs_trans_reserve(tp, 0, XFS_WRITEID_LOG_RES(mp),
4604 xfs_trans_cancel(tp, 0);
4608 xfs_ilock(ip, XFS_ILOCK_EXCL);
4610 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
4611 xfs_trans_ihold(tp, ip);
4613 if ((attr_flags & ATTR_DMI) == 0) {
4614 ip->i_d.di_mode &= ~S_ISUID;
4617 * Note that we don't have to worry about mandatory
4618 * file locking being disabled here because we only
4619 * clear the S_ISGID bit if the Group execute bit is
4620 * on, but if it was on then mandatory locking wouldn't
4621 * have been enabled.
4623 if (ip->i_d.di_mode & S_IXGRP)
4624 ip->i_d.di_mode &= ~S_ISGID;
4626 xfs_ichgtime(ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
4629 ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC;
4630 else if (clrprealloc)
4631 ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC;
4633 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
4634 xfs_trans_set_sync(tp);
4636 error = xfs_trans_commit(tp, 0, NULL);
4638 xfs_iunlock(ip, XFS_ILOCK_EXCL);
4643 vnodeops_t xfs_vnodeops = {
4644 BHV_IDENTITY_INIT(VN_BHV_XFS,VNODE_POSITION_XFS),
4645 .vop_open = xfs_open,
4646 .vop_read = xfs_read,
4647 #ifdef HAVE_SENDFILE
4648 .vop_sendfile = xfs_sendfile,
4650 .vop_write = xfs_write,
4651 .vop_ioctl = xfs_ioctl,
4652 .vop_getattr = xfs_getattr,
4653 .vop_setattr = xfs_setattr,
4654 .vop_access = xfs_access,
4655 .vop_lookup = xfs_lookup,
4656 .vop_create = xfs_create,
4657 .vop_remove = xfs_remove,
4658 .vop_link = xfs_link,
4659 .vop_rename = xfs_rename,
4660 .vop_mkdir = xfs_mkdir,
4661 .vop_rmdir = xfs_rmdir,
4662 .vop_readdir = xfs_readdir,
4663 .vop_symlink = xfs_symlink,
4664 .vop_readlink = xfs_readlink,
4665 .vop_fsync = xfs_fsync,
4666 .vop_inactive = xfs_inactive,
4667 .vop_fid2 = xfs_fid2,
4668 .vop_rwlock = xfs_rwlock,
4669 .vop_rwunlock = xfs_rwunlock,
4670 .vop_bmap = xfs_bmap,
4671 .vop_reclaim = xfs_reclaim,
4672 .vop_attr_get = xfs_attr_get,
4673 .vop_attr_set = xfs_attr_set,
4674 .vop_attr_remove = xfs_attr_remove,
4675 .vop_attr_list = xfs_attr_list,
4676 .vop_link_removed = (vop_link_removed_t)fs_noval,
4677 .vop_vnode_change = (vop_vnode_change_t)fs_noval,
4678 .vop_tosspages = fs_tosspages,
4679 .vop_flushinval_pages = fs_flushinval_pages,
4680 .vop_flush_pages = fs_flush_pages,
4681 .vop_release = xfs_release,
4682 .vop_iflush = xfs_inode_flush,