2 * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 * Further, this software is distributed without any warranty that it is
13 * free of the rightful claim of any third person regarding infringement
14 * or the like. Any license provided herein, whether implied or
15 * otherwise, applies only to this software file. Patent licenses, if
16 * any, provided herein do not apply to combinations of this program with
17 * other software, or any other product whatsoever.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write the Free Software Foundation, Inc., 59
21 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
24 * Mountain View, CA 94043, or:
28 * For further information regarding this notice, see:
30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
34 #include "xfs_macros.h"
35 #include "xfs_types.h"
38 #include "xfs_trans.h"
43 #include "xfs_dmapi.h"
44 #include "xfs_mount.h"
45 #include "xfs_alloc_btree.h"
46 #include "xfs_bmap_btree.h"
47 #include "xfs_ialloc_btree.h"
48 #include "xfs_itable.h"
49 #include "xfs_btree.h"
50 #include "xfs_ialloc.h"
51 #include "xfs_alloc.h"
52 #include "xfs_attr_sf.h"
53 #include "xfs_dir_sf.h"
54 #include "xfs_dir2_sf.h"
55 #include "xfs_dinode.h"
56 #include "xfs_inode_item.h"
57 #include "xfs_inode.h"
59 #include "xfs_da_btree.h"
62 #include "xfs_refcache.h"
63 #include "xfs_error.h"
65 #include "xfs_rtalloc.h"
66 #include "xfs_quota.h"
67 #include "xfs_utils.h"
68 #include "xfs_trans_space.h"
69 #include "xfs_dir_leaf.h"
71 #include "xfs_log_priv.h"
75 * The maximum pathlen is 1024 bytes. Since the minimum file system
76 * blocksize is 512 bytes, we can get a max of 2 extents back from
79 #define SYMLINK_MAPS 2
82 * For xfs, we check that the file isn't too big to be opened by this kernel.
83 * No other open action is required for regular files. Devices are handled
84 * through the specfs file system, pipes through fifofs. Device and
85 * fifo vnodes are "wrapped" by specfs and fifofs vnodes, respectively,
86 * when a new vnode is first looked up or created.
97 vp = BHV_TO_VNODE(bdp);
100 if (XFS_FORCED_SHUTDOWN(ip->i_mount))
101 return XFS_ERROR(EIO);
104 * If it's a directory with any blocks, read-ahead block 0
105 * as we're almost certain to have the next operation be a read there.
107 if (vp->v_type == VDIR && ip->i_d.di_nextents > 0) {
108 mode = xfs_ilock_map_shared(ip);
109 if (ip->i_d.di_nextents > 0)
110 (void)xfs_da_reada_buf(NULL, ip, 0, XFS_DATA_FORK);
111 xfs_iunlock(ip, mode);
131 vp = BHV_TO_VNODE(bdp);
132 vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
134 ip = XFS_BHVTOI(bdp);
137 if (XFS_FORCED_SHUTDOWN(mp))
138 return XFS_ERROR(EIO);
140 if (!(flags & ATTR_LAZY))
141 xfs_ilock(ip, XFS_ILOCK_SHARED);
143 vap->va_size = ip->i_d.di_size;
144 if (vap->va_mask == XFS_AT_SIZE)
148 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
149 vap->va_nodeid = ip->i_ino;
151 vap->va_nodeid += mp->m_inoadd;
153 vap->va_nlink = ip->i_d.di_nlink;
156 * Quick exit for non-stat callers
159 ~(XFS_AT_SIZE|XFS_AT_FSID|XFS_AT_NODEID|
160 XFS_AT_NLINK|XFS_AT_BLKSIZE)) == 0)
164 * Copy from in-core inode.
166 vap->va_type = vp->v_type;
167 vap->va_mode = ip->i_d.di_mode & MODEMASK;
168 vap->va_uid = ip->i_d.di_uid;
169 vap->va_gid = ip->i_d.di_gid;
170 vap->va_projid = ip->i_d.di_projid;
173 * Check vnode type block/char vs. everything else.
174 * Do it with bitmask because that's faster than looking
175 * for multiple values individually.
177 if (((1 << vp->v_type) & ((1<<VBLK) | (1<<VCHR))) == 0) {
180 if (!(ip->i_d.di_flags & XFS_DIFLAG_REALTIME)) {
183 /* Large block sizes confuse various
184 * user space programs, so letting the
185 * stripe size through is not a good
188 vap->va_blocksize = mp->m_swidth ?
190 * If the underlying volume is a stripe, then
191 * return the stripe width in bytes as the
192 * recommended I/O size.
194 (mp->m_swidth << mp->m_sb.sb_blocklog) :
196 * Return the largest of the preferred buffer
197 * sizes since doing small I/Os into larger
198 * buffers causes buffers to be decommissioned.
199 * The value returned is in bytes.
201 (1 << (int)MAX(mp->m_readio_log,
207 * Return the largest of the preferred buffer
208 * sizes since doing small I/Os into larger
209 * buffers causes buffers to be decommissioned.
210 * The value returned is in bytes.
212 1 << (int)MAX(mp->m_readio_log,
218 * If the file blocks are being allocated from a
219 * realtime partition, then return the inode's
220 * realtime extent size or the realtime volume's
223 vap->va_blocksize = ip->i_d.di_extsize ?
224 (ip->i_d.di_extsize << mp->m_sb.sb_blocklog) :
225 (mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog);
228 vap->va_rdev = ip->i_df.if_u2.if_rdev;
229 vap->va_blocksize = BLKDEV_IOSIZE;
232 vap->va_atime.tv_sec = ip->i_d.di_atime.t_sec;
233 vap->va_atime.tv_nsec = ip->i_d.di_atime.t_nsec;
234 vap->va_mtime.tv_sec = ip->i_d.di_mtime.t_sec;
235 vap->va_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
236 vap->va_ctime.tv_sec = ip->i_d.di_ctime.t_sec;
237 vap->va_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
240 * Exit for stat callers. See if any of the rest of the fields
241 * to be filled in are needed.
244 (XFS_AT_XFLAGS|XFS_AT_EXTSIZE|XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS|
245 XFS_AT_GENCOUNT|XFS_AT_VCODE)) == 0)
249 * Convert di_flags to xflags.
251 vap->va_xflags = xfs_dic2xflags(&ip->i_d, ARCH_NOCONVERT);
254 * Exit for inode revalidate. See if any of the rest of
255 * the fields to be filled in are needed.
258 (XFS_AT_EXTSIZE|XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS|
259 XFS_AT_GENCOUNT|XFS_AT_VCODE)) == 0)
262 vap->va_extsize = ip->i_d.di_extsize << mp->m_sb.sb_blocklog;
264 (ip->i_df.if_flags & XFS_IFEXTENTS) ?
265 ip->i_df.if_bytes / sizeof(xfs_bmbt_rec_t) :
269 (ip->i_afp->if_flags & XFS_IFEXTENTS) ?
270 ip->i_afp->if_bytes / sizeof(xfs_bmbt_rec_t) :
271 ip->i_d.di_anextents;
273 vap->va_anextents = 0;
274 vap->va_gen = ip->i_d.di_gen;
277 if (!(flags & ATTR_LAZY))
278 xfs_iunlock(ip, XFS_ILOCK_SHARED);
304 xfs_prid_t projid=0, iprojid=0;
305 int mandlock_before, mandlock_after;
306 struct xfs_dquot *udqp, *gdqp, *olddquot1, *olddquot2;
309 vp = BHV_TO_VNODE(bdp);
310 vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
312 if (vp->v_vfsp->vfs_flag & VFS_RDONLY)
313 return XFS_ERROR(EROFS);
316 * Cannot set certain attributes.
319 if (mask & XFS_AT_NOSET) {
320 return XFS_ERROR(EINVAL);
323 ip = XFS_BHVTOI(bdp);
326 if (XFS_FORCED_SHUTDOWN(mp))
327 return XFS_ERROR(EIO);
330 * Timestamps do not need to be logged and hence do not
331 * need to be done within a transaction.
333 if (mask & XFS_AT_UPDTIMES) {
334 ASSERT((mask & ~XFS_AT_UPDTIMES) == 0);
335 timeflags = ((mask & XFS_AT_UPDATIME) ? XFS_ICHGTIME_ACC : 0) |
336 ((mask & XFS_AT_UPDCTIME) ? XFS_ICHGTIME_CHG : 0) |
337 ((mask & XFS_AT_UPDMTIME) ? XFS_ICHGTIME_MOD : 0);
338 xfs_ichgtime(ip, timeflags);
342 olddquot1 = olddquot2 = NULL;
346 * If disk quotas is on, we make sure that the dquots do exist on disk,
347 * before we start any other transactions. Trying to do this later
348 * is messy. We don't care to take a readlock to look at the ids
349 * in inode here, because we can't hold it across the trans_reserve.
350 * If the IDs do change before we take the ilock, we're covered
351 * because the i_*dquot fields will get updated anyway.
353 if (XFS_IS_QUOTA_ON(mp) && (mask & (XFS_AT_UID|XFS_AT_GID))) {
356 if (mask & XFS_AT_UID) {
358 qflags |= XFS_QMOPT_UQUOTA;
360 uid = ip->i_d.di_uid;
362 if (mask & XFS_AT_GID) {
364 qflags |= XFS_QMOPT_GQUOTA;
366 gid = ip->i_d.di_gid;
369 * We take a reference when we initialize udqp and gdqp,
370 * so it is important that we never blindly double trip on
371 * the same variable. See xfs_create() for an example.
373 ASSERT(udqp == NULL);
374 ASSERT(gdqp == NULL);
375 code = XFS_QM_DQVOPALLOC(mp, ip, uid,gid, qflags, &udqp, &gdqp);
381 * For the other attributes, we acquire the inode lock and
382 * first do an error checking pass.
385 lock_flags = XFS_ILOCK_EXCL;
386 if (!(mask & XFS_AT_SIZE)) {
387 if ((mask != (XFS_AT_CTIME|XFS_AT_ATIME|XFS_AT_MTIME)) ||
388 (mp->m_flags & XFS_MOUNT_WSYNC)) {
389 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
391 if ((code = xfs_trans_reserve(tp, 0,
392 XFS_ICHANGE_LOG_RES(mp), 0,
399 if (DM_EVENT_ENABLED (vp->v_vfsp, ip, DM_EVENT_TRUNCATE) &&
400 !(flags & ATTR_DMI)) {
401 int dmflags = AT_DELAY_FLAG(flags) | DM_SEM_FLAG_WR;
402 code = XFS_SEND_DATA(mp, DM_EVENT_TRUNCATE, vp,
403 vap->va_size, 0, dmflags, NULL);
409 lock_flags |= XFS_IOLOCK_EXCL;
412 xfs_ilock(ip, lock_flags);
414 if (_MAC_XFS_IACCESS(ip, MACWRITE, credp)) {
415 code = XFS_ERROR(EACCES);
419 /* boolean: are we the file owner? */
420 file_owner = (current_fsuid(credp) == ip->i_d.di_uid);
423 * Change various properties of a file.
424 * Only the owner or users with CAP_FOWNER
425 * capability may do these things.
428 (XFS_AT_MODE|XFS_AT_XFLAGS|XFS_AT_EXTSIZE|XFS_AT_UID|
429 XFS_AT_GID|XFS_AT_PROJID)) {
431 * CAP_FOWNER overrides the following restrictions:
433 * The user ID of the calling process must be equal
434 * to the file owner ID, except in cases where the
435 * CAP_FSETID capability is applicable.
437 if (!file_owner && !capable(CAP_FOWNER)) {
438 code = XFS_ERROR(EPERM);
443 * CAP_FSETID overrides the following restrictions:
445 * The effective user ID of the calling process shall match
446 * the file owner when setting the set-user-ID and
447 * set-group-ID bits on that file.
449 * The effective group ID or one of the supplementary group
450 * IDs of the calling process shall match the group owner of
451 * the file when setting the set-group-ID bit on that file
453 if (mask & XFS_AT_MODE) {
456 if ((vap->va_mode & S_ISUID) && !file_owner)
458 if ((vap->va_mode & S_ISGID) &&
459 !in_group_p((gid_t)ip->i_d.di_gid))
462 /* Linux allows this, Irix doesn't. */
463 if ((vap->va_mode & S_ISVTX) && vp->v_type != VDIR)
466 if (m && !capable(CAP_FSETID))
472 * Change file ownership. Must be the owner or privileged.
473 * If the system was configured with the "restricted_chown"
474 * option, the owner is not permitted to give away the file,
475 * and can change the group id only to a group of which he
476 * or she is a member.
478 if (mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_PROJID)) {
480 * These IDs could have changed since we last looked at them.
481 * But, we're assured that if the ownership did change
482 * while we didn't have the inode locked, inode's dquot(s)
483 * would have changed also.
485 iuid = ip->i_d.di_uid;
486 iprojid = ip->i_d.di_projid;
487 igid = ip->i_d.di_gid;
488 gid = (mask & XFS_AT_GID) ? vap->va_gid : igid;
489 uid = (mask & XFS_AT_UID) ? vap->va_uid : iuid;
490 projid = (mask & XFS_AT_PROJID) ? (xfs_prid_t)vap->va_projid :
494 * CAP_CHOWN overrides the following restrictions:
496 * If _POSIX_CHOWN_RESTRICTED is defined, this capability
497 * shall override the restriction that a process cannot
498 * change the user ID of a file it owns and the restriction
499 * that the group ID supplied to the chown() function
500 * shall be equal to either the group ID or one of the
501 * supplementary group IDs of the calling process.
503 * XXX: How does restricted_chown affect projid?
505 if (restricted_chown &&
506 (iuid != uid || (igid != gid &&
507 !in_group_p((gid_t)gid))) &&
508 !capable(CAP_CHOWN)) {
509 code = XFS_ERROR(EPERM);
513 * Do a quota reservation only if uid or gid is actually
516 if ((XFS_IS_UQUOTA_ON(mp) && iuid != uid) ||
517 (XFS_IS_GQUOTA_ON(mp) && igid != gid)) {
519 code = XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, udqp, gdqp,
520 capable(CAP_FOWNER) ?
521 XFS_QMOPT_FORCE_RES : 0);
522 if (code) /* out of quota */
528 * Truncate file. Must have write permission and not be a directory.
530 if (mask & XFS_AT_SIZE) {
531 /* Short circuit the truncate case for zero length files */
532 if ((vap->va_size == 0) &&
533 (ip->i_d.di_size == 0) && (ip->i_d.di_nextents == 0)) {
534 xfs_iunlock(ip, XFS_ILOCK_EXCL);
535 lock_flags &= ~XFS_ILOCK_EXCL;
536 if (mask & XFS_AT_CTIME)
537 xfs_ichgtime(ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
542 if (vp->v_type == VDIR) {
543 code = XFS_ERROR(EISDIR);
545 } else if (vp->v_type != VREG) {
546 code = XFS_ERROR(EINVAL);
550 * Make sure that the dquots are attached to the inode.
552 if ((code = XFS_QM_DQATTACH(mp, ip, XFS_QMOPT_ILOCKED)))
557 * Change file access or modified times.
559 if (mask & (XFS_AT_ATIME|XFS_AT_MTIME)) {
561 if ((flags & ATTR_UTIME) &&
562 !capable(CAP_FOWNER)) {
563 code = XFS_ERROR(EPERM);
570 * Change extent size or realtime flag.
572 if (mask & (XFS_AT_EXTSIZE|XFS_AT_XFLAGS)) {
574 * Can't change extent size if any extents are allocated.
576 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
577 (mask & XFS_AT_EXTSIZE) &&
578 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
580 code = XFS_ERROR(EINVAL); /* EFBIG? */
585 * Can't set extent size unless the file is marked, or
586 * about to be marked as a realtime file.
588 * This check will be removed when fixed size extents
589 * with buffered data writes is implemented.
592 if ((mask & XFS_AT_EXTSIZE) &&
593 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
595 (!((ip->i_d.di_flags & XFS_DIFLAG_REALTIME) ||
596 ((mask & XFS_AT_XFLAGS) &&
597 (vap->va_xflags & XFS_XFLAG_REALTIME))))) {
598 code = XFS_ERROR(EINVAL);
603 * Can't change realtime flag if any extents are allocated.
605 if (ip->i_d.di_nextents && (mask & XFS_AT_XFLAGS) &&
606 (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) !=
607 (vap->va_xflags & XFS_XFLAG_REALTIME)) {
608 code = XFS_ERROR(EINVAL); /* EFBIG? */
612 * Extent size must be a multiple of the appropriate block
613 * size, if set at all.
615 if ((mask & XFS_AT_EXTSIZE) && vap->va_extsize != 0) {
618 if ((ip->i_d.di_flags & XFS_DIFLAG_REALTIME) ||
619 ((mask & XFS_AT_XFLAGS) &&
620 (vap->va_xflags & XFS_XFLAG_REALTIME))) {
621 size = mp->m_sb.sb_rextsize <<
622 mp->m_sb.sb_blocklog;
624 size = mp->m_sb.sb_blocksize;
626 if (vap->va_extsize % size) {
627 code = XFS_ERROR(EINVAL);
632 * If realtime flag is set then must have realtime data.
634 if ((mask & XFS_AT_XFLAGS) &&
635 (vap->va_xflags & XFS_XFLAG_REALTIME)) {
636 if ((mp->m_sb.sb_rblocks == 0) ||
637 (mp->m_sb.sb_rextsize == 0) ||
638 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
639 code = XFS_ERROR(EINVAL);
645 * Can't modify an immutable/append-only file unless
646 * we have appropriate permission.
648 if ((mask & XFS_AT_XFLAGS) &&
650 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
652 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
653 !capable(CAP_LINUX_IMMUTABLE)) {
654 code = XFS_ERROR(EPERM);
660 * Now we can make the changes. Before we join the inode
661 * to the transaction, if XFS_AT_SIZE is set then take care of
662 * the part of the truncation that must be done without the
663 * inode lock. This needs to be done before joining the inode
664 * to the transaction, because the inode cannot be unlocked
665 * once it is a part of the transaction.
667 if (mask & XFS_AT_SIZE) {
669 if (vap->va_size > ip->i_d.di_size)
670 code = xfs_igrow_start(ip, vap->va_size, credp);
671 xfs_iunlock(ip, XFS_ILOCK_EXCL);
673 code = xfs_itruncate_data(ip, vap->va_size);
676 lock_flags &= ~XFS_ILOCK_EXCL;
677 ASSERT(lock_flags == XFS_IOLOCK_EXCL);
680 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE);
681 if ((code = xfs_trans_reserve(tp, 0,
682 XFS_ITRUNCATE_LOG_RES(mp), 0,
683 XFS_TRANS_PERM_LOG_RES,
684 XFS_ITRUNCATE_LOG_COUNT))) {
685 xfs_trans_cancel(tp, 0);
686 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
689 commit_flags = XFS_TRANS_RELEASE_LOG_RES;
690 xfs_ilock(ip, XFS_ILOCK_EXCL);
694 xfs_trans_ijoin(tp, ip, lock_flags);
695 xfs_trans_ihold(tp, ip);
698 /* determine whether mandatory locking mode changes */
699 mandlock_before = MANDLOCK(vp, ip->i_d.di_mode);
702 * Truncate file. Must have write permission and not be a directory.
704 if (mask & XFS_AT_SIZE) {
705 if (vap->va_size > ip->i_d.di_size) {
706 xfs_igrow_finish(tp, ip, vap->va_size,
707 !(flags & ATTR_DMI));
708 } else if ((vap->va_size <= ip->i_d.di_size) ||
709 ((vap->va_size == 0) && ip->i_d.di_nextents)) {
711 * signal a sync transaction unless
712 * we're truncating an already unlinked
713 * file on a wsync filesystem
715 code = xfs_itruncate_finish(&tp, ip,
716 (xfs_fsize_t)vap->va_size,
718 ((ip->i_d.di_nlink != 0 ||
719 !(mp->m_flags & XFS_MOUNT_WSYNC))
726 * Have to do this even if the file's size doesn't change.
728 timeflags |= XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG;
732 * Change file access modes.
734 if (mask & XFS_AT_MODE) {
735 ip->i_d.di_mode &= S_IFMT;
736 ip->i_d.di_mode |= vap->va_mode & ~S_IFMT;
738 xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE);
739 timeflags |= XFS_ICHGTIME_CHG;
743 * Change file ownership. Must be the owner or privileged.
744 * If the system was configured with the "restricted_chown"
745 * option, the owner is not permitted to give away the file,
746 * and can change the group id only to a group of which he
747 * or she is a member.
749 if (mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_PROJID)) {
751 * CAP_FSETID overrides the following restrictions:
753 * The set-user-ID and set-group-ID bits of a file will be
754 * cleared upon successful return from chown()
756 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
757 !capable(CAP_FSETID)) {
758 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
762 * Change the ownerships and register quota modifications
763 * in the transaction.
766 if (XFS_IS_UQUOTA_ON(mp)) {
767 ASSERT(mask & XFS_AT_UID);
769 olddquot1 = XFS_QM_DQVOPCHOWN(mp, tp, ip,
770 &ip->i_udquot, udqp);
772 ip->i_d.di_uid = uid;
775 if (XFS_IS_GQUOTA_ON(mp)) {
776 ASSERT(mask & XFS_AT_GID);
778 olddquot2 = XFS_QM_DQVOPCHOWN(mp, tp, ip,
779 &ip->i_gdquot, gdqp);
781 ip->i_d.di_gid = gid;
783 if (iprojid != projid) {
784 ip->i_d.di_projid = projid;
786 * We may have to rev the inode as well as
787 * the superblock version number since projids didn't
788 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
790 if (ip->i_d.di_version == XFS_DINODE_VERSION_1)
791 xfs_bump_ino_vers2(tp, ip);
794 xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE);
795 timeflags |= XFS_ICHGTIME_CHG;
800 * Change file access or modified times.
802 if (mask & (XFS_AT_ATIME|XFS_AT_MTIME)) {
803 if (mask & XFS_AT_ATIME) {
804 ip->i_d.di_atime.t_sec = vap->va_atime.tv_sec;
805 ip->i_d.di_atime.t_nsec = vap->va_atime.tv_nsec;
806 ip->i_update_core = 1;
807 timeflags &= ~XFS_ICHGTIME_ACC;
809 if (mask & XFS_AT_MTIME) {
810 ip->i_d.di_mtime.t_sec = vap->va_mtime.tv_sec;
811 ip->i_d.di_mtime.t_nsec = vap->va_mtime.tv_nsec;
812 timeflags &= ~XFS_ICHGTIME_MOD;
813 timeflags |= XFS_ICHGTIME_CHG;
815 if (tp && (flags & ATTR_UTIME))
816 xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE);
820 * Change XFS-added attributes.
822 if (mask & (XFS_AT_EXTSIZE|XFS_AT_XFLAGS)) {
823 if (mask & XFS_AT_EXTSIZE) {
825 * Converting bytes to fs blocks.
827 ip->i_d.di_extsize = vap->va_extsize >>
828 mp->m_sb.sb_blocklog;
830 if (mask & XFS_AT_XFLAGS) {
831 ip->i_d.di_flags = 0;
832 if (vap->va_xflags & XFS_XFLAG_REALTIME) {
833 ip->i_d.di_flags |= XFS_DIFLAG_REALTIME;
834 ip->i_iocore.io_flags |= XFS_IOCORE_RT;
836 if (vap->va_xflags & XFS_XFLAG_IMMUTABLE)
837 ip->i_d.di_flags |= XFS_DIFLAG_IMMUTABLE;
838 if (vap->va_xflags & XFS_XFLAG_IUNLINK)
839 ip->i_d.di_flags |= XFS_DIFLAG_IUNLINK;
840 if (vap->va_xflags & XFS_XFLAG_BARRIER)
841 ip->i_d.di_flags |= XFS_DIFLAG_BARRIER;
842 if (vap->va_xflags & XFS_XFLAG_APPEND)
843 ip->i_d.di_flags |= XFS_DIFLAG_APPEND;
844 if (vap->va_xflags & XFS_XFLAG_SYNC)
845 ip->i_d.di_flags |= XFS_DIFLAG_SYNC;
846 if (vap->va_xflags & XFS_XFLAG_NOATIME)
847 ip->i_d.di_flags |= XFS_DIFLAG_NOATIME;
848 if (vap->va_xflags & XFS_XFLAG_NODUMP)
849 ip->i_d.di_flags |= XFS_DIFLAG_NODUMP;
850 /* can't set PREALLOC this way, just ignore it */
852 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
853 timeflags |= XFS_ICHGTIME_CHG;
857 * Change file inode change time only if XFS_AT_CTIME set
858 * AND we have been called by a DMI function.
861 if ( (flags & ATTR_DMI) && (mask & XFS_AT_CTIME) ) {
862 ip->i_d.di_ctime.t_sec = vap->va_ctime.tv_sec;
863 ip->i_d.di_ctime.t_nsec = vap->va_ctime.tv_nsec;
864 ip->i_update_core = 1;
865 timeflags &= ~XFS_ICHGTIME_CHG;
869 * Send out timestamp changes that need to be set to the
870 * current time. Not done when called by a DMI function.
872 if (timeflags && !(flags & ATTR_DMI))
873 xfs_ichgtime(ip, timeflags);
875 XFS_STATS_INC(xs_ig_attrchg);
878 * If this is a synchronous mount, make sure that the
879 * transaction goes to disk before returning to the user.
880 * This is slightly sub-optimal in that truncates require
881 * two sync transactions instead of one for wsync filesytems.
882 * One for the truncate and one for the timestamps since we
883 * don't want to change the timestamps unless we're sure the
884 * truncate worked. Truncates are less than 1% of the laddis
885 * mix so this probably isn't worth the trouble to optimize.
889 if (mp->m_flags & XFS_MOUNT_WSYNC)
890 xfs_trans_set_sync(tp);
892 code = xfs_trans_commit(tp, commit_flags, NULL);
896 * If the (regular) file's mandatory locking mode changed, then
897 * notify the vnode. We do this under the inode lock to prevent
898 * racing calls to vop_vnode_change.
900 mandlock_after = MANDLOCK(vp, ip->i_d.di_mode);
901 if (mandlock_before != mandlock_after) {
902 VOP_VNODE_CHANGE(vp, VCHANGE_FLAGS_ENF_LOCKING,
906 xfs_iunlock(ip, lock_flags);
909 * Release any dquot(s) the inode had kept before chown.
911 XFS_QM_DQRELE(mp, olddquot1);
912 XFS_QM_DQRELE(mp, olddquot2);
913 XFS_QM_DQRELE(mp, udqp);
914 XFS_QM_DQRELE(mp, gdqp);
920 if (DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_ATTRIBUTE) &&
921 !(flags & ATTR_DMI)) {
922 (void) XFS_SEND_NAMESP(mp, DM_EVENT_ATTRIBUTE, vp, DM_RIGHT_NULL,
923 NULL, DM_RIGHT_NULL, NULL, NULL,
924 0, 0, AT_DELAY_FLAG(flags));
929 commit_flags |= XFS_TRANS_ABORT;
932 XFS_QM_DQRELE(mp, udqp);
933 XFS_QM_DQRELE(mp, gdqp);
935 xfs_trans_cancel(tp, commit_flags);
937 if (lock_flags != 0) {
938 xfs_iunlock(ip, lock_flags);
946 * Null conversion from vnode mode bits to inode mode bits, as in efs.
957 vn_trace_entry(BHV_TO_VNODE(bdp), __FUNCTION__,
958 (inst_t *)__return_address);
960 ip = XFS_BHVTOI(bdp);
961 xfs_ilock(ip, XFS_ILOCK_SHARED);
962 error = xfs_iaccess(ip, mode, credp);
963 xfs_iunlock(ip, XFS_ILOCK_SHARED);
987 xfs_bmbt_irec_t mval[SYMLINK_MAPS];
993 vp = BHV_TO_VNODE(bdp);
994 vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
996 ip = XFS_BHVTOI(bdp);
999 if (XFS_FORCED_SHUTDOWN(mp))
1000 return XFS_ERROR(EIO);
1002 xfs_ilock(ip, XFS_ILOCK_SHARED);
1004 ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFLNK);
1006 offset = uiop->uio_offset;
1007 count = uiop->uio_resid;
1010 error = XFS_ERROR(EINVAL);
1018 if (!(ioflags & IO_INVIS)) {
1019 xfs_ichgtime(ip, XFS_ICHGTIME_ACC);
1023 * See if the symlink is stored inline.
1025 pathlen = (int)ip->i_d.di_size;
1027 if (ip->i_df.if_flags & XFS_IFINLINE) {
1028 error = uio_read(ip->i_df.if_u1.if_data, pathlen, uiop);
1032 * Symlink not inline. Call bmap to get it in.
1034 nmaps = SYMLINK_MAPS;
1036 error = xfs_bmapi(NULL, ip, 0, XFS_B_TO_FSB(mp, pathlen),
1037 0, NULL, 0, mval, &nmaps, NULL);
1043 for (n = 0; n < nmaps; n++) {
1044 d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock);
1045 byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount);
1046 bp = xfs_buf_read(mp->m_ddev_targp, d,
1047 BTOBB(byte_cnt), 0);
1048 error = XFS_BUF_GETERROR(bp);
1050 xfs_ioerror_alert("xfs_readlink",
1051 ip->i_mount, bp, XFS_BUF_ADDR(bp));
1055 if (pathlen < byte_cnt)
1057 pathlen -= byte_cnt;
1059 error = uio_read(XFS_BUF_PTR(bp), byte_cnt, uiop);
1068 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1077 * This is called to sync the inode and its data out to disk.
1078 * We need to hold the I/O lock while flushing the data, and
1079 * the inode lock while flushing the inode. The inode lock CANNOT
1080 * be held while flushing the data, so acquire after we're done
1095 vn_trace_entry(BHV_TO_VNODE(bdp),
1096 __FUNCTION__, (inst_t *)__return_address);
1098 ip = XFS_BHVTOI(bdp);
1100 ASSERT(start >= 0 && stop >= -1);
1102 if (XFS_FORCED_SHUTDOWN(ip->i_mount))
1103 return XFS_ERROR(EIO);
1106 * We always need to make sure that the required inode state
1107 * is safe on disk. The vnode might be clean but because
1108 * of committed transactions that haven't hit the disk yet.
1109 * Likewise, there could be unflushed non-transactional
1110 * changes to the inode core that have to go to disk.
1112 * The following code depends on one assumption: that
1113 * any transaction that changes an inode logs the core
1114 * because it has to change some field in the inode core
1115 * (typically nextents or nblocks). That assumption
1116 * implies that any transactions against an inode will
1117 * catch any non-transactional updates. If inode-altering
1118 * transactions exist that violate this assumption, the
1119 * code breaks. Right now, it figures that if the involved
1120 * update_* field is clear and the inode is unpinned, the
1121 * inode is clean. Either it's been flushed or it's been
1122 * committed and the commit has hit the disk unpinning the inode.
1123 * (Note that xfs_inode_item_format() called at commit clears
1124 * the update_* fields.)
1126 xfs_ilock(ip, XFS_ILOCK_SHARED);
1128 /* If we are flushing data then we care about update_size
1129 * being set, otherwise we care about update_core
1131 if ((flag & FSYNC_DATA) ?
1132 (ip->i_update_size == 0) :
1133 (ip->i_update_core == 0)) {
1135 * Timestamps/size haven't changed since last inode
1136 * flush or inode transaction commit. That means
1137 * either nothing got written or a transaction
1138 * committed which caught the updates. If the
1139 * latter happened and the transaction hasn't
1140 * hit the disk yet, the inode will be still
1141 * be pinned. If it is, force the log.
1144 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1146 if (xfs_ipincount(ip)) {
1147 xfs_log_force(ip->i_mount, (xfs_lsn_t)0,
1149 ((flag & FSYNC_WAIT)
1150 ? XFS_LOG_SYNC : 0));
1155 * Kick off a transaction to log the inode
1156 * core to get the updates. Make it
1157 * sync if FSYNC_WAIT is passed in (which
1158 * is done by everybody but specfs). The
1159 * sync transaction will also force the log.
1161 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1162 tp = xfs_trans_alloc(ip->i_mount, XFS_TRANS_FSYNC_TS);
1163 if ((error = xfs_trans_reserve(tp, 0,
1164 XFS_FSYNC_TS_LOG_RES(ip->i_mount),
1166 xfs_trans_cancel(tp, 0);
1169 xfs_ilock(ip, XFS_ILOCK_EXCL);
1172 * Note - it's possible that we might have pushed
1173 * ourselves out of the way during trans_reserve
1174 * which would flush the inode. But there's no
1175 * guarantee that the inode buffer has actually
1176 * gone out yet (it's delwri). Plus the buffer
1177 * could be pinned anyway if it's part of an
1178 * inode in another recent transaction. So we
1179 * play it safe and fire off the transaction anyway.
1181 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1182 xfs_trans_ihold(tp, ip);
1183 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1184 if (flag & FSYNC_WAIT)
1185 xfs_trans_set_sync(tp);
1186 error = xfs_trans_commit(tp, 0, NULL);
1188 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1194 * This is called by xfs_inactive to free any blocks beyond eof,
1195 * when the link count isn't zero.
1198 xfs_inactive_free_eofblocks(
1204 xfs_fileoff_t end_fsb;
1205 xfs_fileoff_t last_fsb;
1206 xfs_filblks_t map_len;
1208 xfs_bmbt_irec_t imap;
1211 * Figure out if there are any blocks beyond the end
1212 * of the file. If not, then there is nothing to do.
1214 end_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)ip->i_d.di_size));
1215 last_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp));
1216 map_len = last_fsb - end_fsb;
1221 xfs_ilock(ip, XFS_ILOCK_SHARED);
1222 error = xfs_bmapi(NULL, ip, end_fsb, map_len, 0,
1223 NULL, 0, &imap, &nimaps, NULL);
1224 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1226 if (!error && (nimaps != 0) &&
1227 (imap.br_startblock != HOLESTARTBLOCK)) {
1229 * Attach the dquots to the inode up front.
1231 if ((error = XFS_QM_DQATTACH(mp, ip, 0)))
1235 * There are blocks after the end of file.
1236 * Free them up now by truncating the file to
1239 tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE);
1242 * Do the xfs_itruncate_start() call before
1243 * reserving any log space because
1244 * itruncate_start will call into the buffer
1245 * cache and we can't
1246 * do that within a transaction.
1248 xfs_ilock(ip, XFS_IOLOCK_EXCL);
1249 xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE,
1252 error = xfs_trans_reserve(tp, 0,
1253 XFS_ITRUNCATE_LOG_RES(mp),
1254 0, XFS_TRANS_PERM_LOG_RES,
1255 XFS_ITRUNCATE_LOG_COUNT);
1257 ASSERT(XFS_FORCED_SHUTDOWN(mp));
1258 xfs_trans_cancel(tp, 0);
1259 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
1263 xfs_ilock(ip, XFS_ILOCK_EXCL);
1264 xfs_trans_ijoin(tp, ip,
1267 xfs_trans_ihold(tp, ip);
1269 error = xfs_itruncate_finish(&tp, ip,
1274 * If we get an error at this point we
1275 * simply don't bother truncating the file.
1278 xfs_trans_cancel(tp,
1279 (XFS_TRANS_RELEASE_LOG_RES |
1282 error = xfs_trans_commit(tp,
1283 XFS_TRANS_RELEASE_LOG_RES,
1286 xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
1292 * Free a symlink that has blocks associated with it.
1295 xfs_inactive_symlink_rmt(
1303 xfs_fsblock_t first_block;
1304 xfs_bmap_free_t free_list;
1307 xfs_bmbt_irec_t mval[SYMLINK_MAPS];
1315 ASSERT(ip->i_d.di_size > XFS_IFORK_DSIZE(ip));
1317 * We're freeing a symlink that has some
1318 * blocks allocated to it. Free the
1319 * blocks here. We know that we've got
1320 * either 1 or 2 extents and that we can
1321 * free them all in one bunmapi call.
1323 ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2);
1324 if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0,
1325 XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) {
1326 ASSERT(XFS_FORCED_SHUTDOWN(mp));
1327 xfs_trans_cancel(tp, 0);
1332 * Lock the inode, fix the size, and join it to the transaction.
1333 * Hold it so in the normal path, we still have it locked for
1334 * the second transaction. In the error paths we need it
1335 * held so the cancel won't rele it, see below.
1337 xfs_ilock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
1338 size = (int)ip->i_d.di_size;
1339 ip->i_d.di_size = 0;
1340 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
1341 xfs_trans_ihold(tp, ip);
1342 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1344 * Find the block(s) so we can inval and unmap them.
1347 XFS_BMAP_INIT(&free_list, &first_block);
1348 nmaps = sizeof(mval) / sizeof(mval[0]);
1349 if ((error = xfs_bmapi(tp, ip, 0, XFS_B_TO_FSB(mp, size),
1350 XFS_BMAPI_METADATA, &first_block, 0, mval, &nmaps,
1354 * Invalidate the block(s).
1356 for (i = 0; i < nmaps; i++) {
1357 bp = xfs_trans_get_buf(tp, mp->m_ddev_targp,
1358 XFS_FSB_TO_DADDR(mp, mval[i].br_startblock),
1359 XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0);
1360 xfs_trans_binval(tp, bp);
1363 * Unmap the dead block(s) to the free_list.
1365 if ((error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps,
1366 &first_block, &free_list, &done)))
1370 * Commit the first transaction. This logs the EFI and the inode.
1372 if ((error = xfs_bmap_finish(&tp, &free_list, first_block, &committed)))
1375 * The transaction must have been committed, since there were
1376 * actually extents freed by xfs_bunmapi. See xfs_bmap_finish.
1377 * The new tp has the extent freeing and EFDs.
1381 * The first xact was committed, so add the inode to the new one.
1382 * Mark it dirty so it will be logged and moved forward in the log as
1383 * part of every commit.
1385 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
1386 xfs_trans_ihold(tp, ip);
1387 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1389 * Get a new, empty transaction to return to our caller.
1391 ntp = xfs_trans_dup(tp);
1393 * Commit the transaction containing extent freeing and EFD's.
1394 * If we get an error on the commit here or on the reserve below,
1395 * we need to unlock the inode since the new transaction doesn't
1396 * have the inode attached.
1398 error = xfs_trans_commit(tp, 0, NULL);
1401 ASSERT(XFS_FORCED_SHUTDOWN(mp));
1405 * Remove the memory for extent descriptions (just bookkeeping).
1407 if (ip->i_df.if_bytes)
1408 xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK);
1409 ASSERT(ip->i_df.if_bytes == 0);
1411 * Put an itruncate log reservation in the new transaction
1414 if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0,
1415 XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) {
1416 ASSERT(XFS_FORCED_SHUTDOWN(mp));
1420 * Return with the inode locked but not joined to the transaction.
1426 xfs_bmap_cancel(&free_list);
1429 * Have to come here with the inode locked and either
1430 * (held and in the transaction) or (not in the transaction).
1431 * If the inode isn't held then cancel would iput it, but
1432 * that's wrong since this is inactive and the vnode ref
1433 * count is 0 already.
1434 * Cancel won't do anything to the inode if held, but it still
1435 * needs to be locked until the cancel is done, if it was
1436 * joined to the transaction.
1438 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
1439 xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
1446 xfs_inactive_symlink_local(
1452 ASSERT(ip->i_d.di_size <= XFS_IFORK_DSIZE(ip));
1454 * We're freeing a symlink which fit into
1455 * the inode. Just free the memory used
1456 * to hold the old symlink.
1458 error = xfs_trans_reserve(*tpp, 0,
1459 XFS_ITRUNCATE_LOG_RES(ip->i_mount),
1460 0, XFS_TRANS_PERM_LOG_RES,
1461 XFS_ITRUNCATE_LOG_COUNT);
1464 xfs_trans_cancel(*tpp, 0);
1468 xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
1471 * Zero length symlinks _can_ exist.
1473 if (ip->i_df.if_bytes > 0) {
1474 xfs_idata_realloc(ip,
1475 -(ip->i_df.if_bytes),
1477 ASSERT(ip->i_df.if_bytes == 0);
1494 ASSERT(ismrlocked(&ip->i_iolock, MR_UPDATE));
1497 ASSERT(ip->i_d.di_forkoff != 0);
1498 xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
1499 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1501 error = xfs_attr_inactive(ip);
1504 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
1505 return (error); /* goto out*/
1508 tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE);
1509 error = xfs_trans_reserve(tp, 0,
1510 XFS_IFREE_LOG_RES(mp),
1511 0, XFS_TRANS_PERM_LOG_RES,
1512 XFS_INACTIVE_LOG_COUNT);
1514 ASSERT(XFS_FORCED_SHUTDOWN(mp));
1515 xfs_trans_cancel(tp, 0);
1517 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
1521 xfs_ilock(ip, XFS_ILOCK_EXCL);
1522 xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
1523 xfs_trans_ihold(tp, ip);
1524 xfs_idestroy_fork(ip, XFS_ATTR_FORK);
1526 ASSERT(ip->i_d.di_anextents == 0);
1541 vp = BHV_TO_VNODE(bdp);
1542 ip = XFS_BHVTOI(bdp);
1544 if ((vp->v_type != VREG) || (ip->i_d.di_mode == 0)) {
1548 /* If this is a read-only mount, don't do this (would generate I/O) */
1549 if (vp->v_vfsp->vfs_flag & VFS_RDONLY)
1552 #ifdef HAVE_REFCACHE
1553 /* If we are in the NFS reference cache then don't do this now */
1560 if (ip->i_d.di_nlink != 0) {
1561 if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) &&
1562 ((ip->i_d.di_size > 0) || (VN_CACHED(vp) > 0)) &&
1563 (ip->i_df.if_flags & XFS_IFEXTENTS)) &&
1564 (!(ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC|XFS_DIFLAG_APPEND)))) {
1565 if ((error = xfs_inactive_free_eofblocks(mp, ip)))
1567 /* Update linux inode block count after free above */
1568 LINVFS_GET_IP(vp)->i_blocks = XFS_FSB_TO_BB(mp,
1569 ip->i_d.di_nblocks + ip->i_delayed_blks);
1579 * This is called when the vnode reference count for the vnode
1580 * goes to zero. If the file has been unlinked, then it must
1581 * now be truncated. Also, we clear all of the read-ahead state
1582 * kept for the inode here since the file is now closed.
1591 xfs_bmap_free_t free_list;
1592 xfs_fsblock_t first_block;
1599 vp = BHV_TO_VNODE(bdp);
1600 vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
1602 ip = XFS_BHVTOI(bdp);
1605 * If the inode is already free, then there can be nothing
1608 if (ip->i_d.di_mode == 0) {
1609 ASSERT(ip->i_df.if_real_bytes == 0);
1610 ASSERT(ip->i_df.if_broot_bytes == 0);
1611 return VN_INACTIVE_CACHE;
1615 * Only do a truncate if it's a regular file with
1616 * some actual space in it. It's OK to look at the
1617 * inode's fields without the lock because we're the
1618 * only one with a reference to the inode.
1620 truncate = ((ip->i_d.di_nlink == 0) &&
1621 ((ip->i_d.di_size != 0) || (ip->i_d.di_nextents > 0)) &&
1622 ((ip->i_d.di_mode & S_IFMT) == S_IFREG));
1626 if (ip->i_d.di_nlink == 0 &&
1627 DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_DESTROY)) {
1628 (void) XFS_SEND_DESTROY(mp, vp, DM_RIGHT_NULL);
1633 /* If this is a read-only mount, don't do this (would generate I/O) */
1634 if (vp->v_vfsp->vfs_flag & VFS_RDONLY)
1637 if (ip->i_d.di_nlink != 0) {
1638 if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) &&
1639 ((ip->i_d.di_size > 0) || (VN_CACHED(vp) > 0)) &&
1640 (ip->i_df.if_flags & XFS_IFEXTENTS)) &&
1641 (!(ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC|XFS_DIFLAG_APPEND)) ||
1642 (ip->i_delayed_blks != 0))) {
1643 if ((error = xfs_inactive_free_eofblocks(mp, ip)))
1644 return (VN_INACTIVE_CACHE);
1645 /* Update linux inode block count after free above */
1646 LINVFS_GET_IP(vp)->i_blocks = XFS_FSB_TO_BB(mp,
1647 ip->i_d.di_nblocks + ip->i_delayed_blks);
1652 ASSERT(ip->i_d.di_nlink == 0);
1654 if ((error = XFS_QM_DQATTACH(mp, ip, 0)))
1655 return (VN_INACTIVE_CACHE);
1657 tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE);
1660 * Do the xfs_itruncate_start() call before
1661 * reserving any log space because itruncate_start
1662 * will call into the buffer cache and we can't
1663 * do that within a transaction.
1665 xfs_ilock(ip, XFS_IOLOCK_EXCL);
1667 xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE, 0);
1669 error = xfs_trans_reserve(tp, 0,
1670 XFS_ITRUNCATE_LOG_RES(mp),
1671 0, XFS_TRANS_PERM_LOG_RES,
1672 XFS_ITRUNCATE_LOG_COUNT);
1674 /* Don't call itruncate_cleanup */
1675 ASSERT(XFS_FORCED_SHUTDOWN(mp));
1676 xfs_trans_cancel(tp, 0);
1677 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
1678 return (VN_INACTIVE_CACHE);
1681 xfs_ilock(ip, XFS_ILOCK_EXCL);
1682 xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
1683 xfs_trans_ihold(tp, ip);
1686 * normally, we have to run xfs_itruncate_finish sync.
1687 * But if filesystem is wsync and we're in the inactive
1688 * path, then we know that nlink == 0, and that the
1689 * xaction that made nlink == 0 is permanently committed
1690 * since xfs_remove runs as a synchronous transaction.
1692 error = xfs_itruncate_finish(&tp, ip, 0, XFS_DATA_FORK,
1693 (!(mp->m_flags & XFS_MOUNT_WSYNC) ? 1 : 0));
1696 xfs_trans_cancel(tp,
1697 XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
1698 xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
1699 return (VN_INACTIVE_CACHE);
1701 } else if ((ip->i_d.di_mode & S_IFMT) == S_IFLNK) {
1704 * If we get an error while cleaning up a
1705 * symlink we bail out.
1707 error = (ip->i_d.di_size > XFS_IFORK_DSIZE(ip)) ?
1708 xfs_inactive_symlink_rmt(ip, &tp) :
1709 xfs_inactive_symlink_local(ip, &tp);
1713 return (VN_INACTIVE_CACHE);
1716 xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
1717 xfs_trans_ihold(tp, ip);
1719 error = xfs_trans_reserve(tp, 0,
1720 XFS_IFREE_LOG_RES(mp),
1721 0, XFS_TRANS_PERM_LOG_RES,
1722 XFS_INACTIVE_LOG_COUNT);
1724 ASSERT(XFS_FORCED_SHUTDOWN(mp));
1725 xfs_trans_cancel(tp, 0);
1726 return (VN_INACTIVE_CACHE);
1729 xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
1730 xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
1731 xfs_trans_ihold(tp, ip);
1735 * If there are attributes associated with the file
1736 * then blow them away now. The code calls a routine
1737 * that recursively deconstructs the attribute fork.
1738 * We need to just commit the current transaction
1739 * because we can't use it for xfs_attr_inactive().
1741 if (ip->i_d.di_anextents > 0) {
1742 error = xfs_inactive_attrs(ip, &tp);
1744 * If we got an error, the transaction is already
1745 * cancelled, and the inode is unlocked. Just get out.
1748 return (VN_INACTIVE_CACHE);
1749 } else if (ip->i_afp) {
1750 xfs_idestroy_fork(ip, XFS_ATTR_FORK);
1756 XFS_BMAP_INIT(&free_list, &first_block);
1757 error = xfs_ifree(tp, ip, &free_list);
1760 * If we fail to free the inode, shut down. The cancel
1761 * might do that, we need to make sure. Otherwise the
1762 * inode might be lost for a long time or forever.
1764 if (!XFS_FORCED_SHUTDOWN(mp)) {
1766 "xfs_inactive: xfs_ifree() returned an error = %d on %s",
1767 error, mp->m_fsname);
1768 xfs_force_shutdown(mp, XFS_METADATA_IO_ERROR);
1770 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT);
1773 * Credit the quota account(s). The inode is gone.
1775 XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_ICOUNT, -1);
1778 * Just ignore errors at this point. There is
1779 * nothing we can do except to try to keep going.
1781 (void) xfs_bmap_finish(&tp, &free_list, first_block,
1783 (void) xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
1786 * Release the dquots held by inode, if any.
1788 XFS_QM_DQDETACH(mp, ip);
1790 xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
1793 return VN_INACTIVE_CACHE;
1802 bhv_desc_t *dir_bdp,
1809 xfs_inode_t *dp, *ip;
1815 dir_vp = BHV_TO_VNODE(dir_bdp);
1816 vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address);
1818 dp = XFS_BHVTOI(dir_bdp);
1820 if (XFS_FORCED_SHUTDOWN(dp->i_mount))
1821 return XFS_ERROR(EIO);
1823 lock_mode = xfs_ilock_map_shared(dp);
1824 error = xfs_dir_lookup_int(dir_bdp, lock_mode, dentry, &e_inum, &ip);
1826 *vpp = XFS_ITOV(ip);
1829 xfs_iunlock_map_shared(dp, lock_mode);
1834 #define XFS_CREATE_NEW_MAXTRIES 10000
1837 * xfs_create (create a new file).
1841 bhv_desc_t *dir_bdp,
1847 char *name = VNAME(dentry);
1849 xfs_inode_t *dp, *ip;
1855 xfs_bmap_free_t free_list;
1856 xfs_fsblock_t first_block;
1857 boolean_t dp_joined_to_trans;
1858 int dm_event_sent = 0;
1862 struct xfs_dquot *udqp, *gdqp;
1868 dir_vp = BHV_TO_VNODE(dir_bdp);
1869 vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address);
1871 dp = XFS_BHVTOI(dir_bdp);
1874 dm_di_mode = vap->va_mode|VTTOIF(vap->va_type);
1875 namelen = VNAMELEN(dentry);
1877 if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_CREATE)) {
1878 error = XFS_SEND_NAMESP(mp, DM_EVENT_CREATE,
1879 dir_vp, DM_RIGHT_NULL, NULL,
1880 DM_RIGHT_NULL, name, NULL,
1888 if (XFS_FORCED_SHUTDOWN(mp))
1889 return XFS_ERROR(EIO);
1891 /* Return through std_return after this point. */
1894 if (vap->va_mask & XFS_AT_PROJID)
1895 prid = (xfs_prid_t)vap->va_projid;
1897 prid = (xfs_prid_t)dfltprid;
1900 * Make sure that we have allocated dquot(s) on disk.
1902 error = XFS_QM_DQVOPALLOC(mp, dp,
1903 current_fsuid(credp), current_fsgid(credp),
1904 XFS_QMOPT_QUOTALL|XFS_QMOPT_INHERIT, &udqp, &gdqp);
1909 dp_joined_to_trans = B_FALSE;
1911 tp = xfs_trans_alloc(mp, XFS_TRANS_CREATE);
1912 cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
1913 resblks = XFS_CREATE_SPACE_RES(mp, namelen);
1915 * Initially assume that the file does not exist and
1916 * reserve the resources for that case. If that is not
1917 * the case we'll drop the one we have and get a more
1918 * appropriate transaction later.
1920 error = xfs_trans_reserve(tp, resblks, XFS_CREATE_LOG_RES(mp), 0,
1921 XFS_TRANS_PERM_LOG_RES, XFS_CREATE_LOG_COUNT);
1922 if (error == ENOSPC) {
1924 error = xfs_trans_reserve(tp, 0, XFS_CREATE_LOG_RES(mp), 0,
1925 XFS_TRANS_PERM_LOG_RES, XFS_CREATE_LOG_COUNT);
1933 xfs_ilock(dp, XFS_ILOCK_EXCL);
1935 XFS_BMAP_INIT(&free_list, &first_block);
1940 * Reserve disk quota and the inode.
1942 error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0);
1947 (error = XFS_DIR_CANENTER(mp, tp, dp, name, namelen)))
1949 rdev = (vap->va_mask & XFS_AT_RDEV) ? vap->va_rdev : 0;
1950 error = xfs_dir_ialloc(&tp, dp,
1951 MAKEIMODE(vap->va_type,vap->va_mode), 1,
1952 rdev, credp, prid, resblks > 0,
1955 if (error == ENOSPC)
1962 * At this point, we've gotten a newly allocated inode.
1963 * It is locked (and joined to the transaction).
1966 ASSERT(ismrlocked (&ip->i_lock, MR_UPDATE));
1969 * Now we join the directory inode to the transaction.
1970 * We do not do it earlier because xfs_dir_ialloc
1971 * might commit the previous transaction (and release
1976 xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
1977 dp_joined_to_trans = B_TRUE;
1979 error = XFS_DIR_CREATENAME(mp, tp, dp, name, namelen, ip->i_ino,
1980 &first_block, &free_list,
1981 resblks ? resblks - XFS_IALLOC_SPACE_RES(mp) : 0);
1983 ASSERT(error != ENOSPC);
1986 xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
1987 xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
1990 * If this is a synchronous mount, make sure that the
1991 * create transaction goes to disk before returning to
1994 if (mp->m_flags & XFS_MOUNT_WSYNC) {
1995 xfs_trans_set_sync(tp);
2001 * Attach the dquot(s) to the inodes and modify them incore.
2002 * These ids of the inode couldn't have changed since the new
2003 * inode has been locked ever since it was created.
2005 XFS_QM_DQVOPCREATE(mp, tp, ip, udqp, gdqp);
2008 * xfs_trans_commit normally decrements the vnode ref count
2009 * when it unlocks the inode. Since we want to return the
2010 * vnode to the caller, we bump the vnode ref count now.
2015 error = xfs_bmap_finish(&tp, &free_list, first_block, &committed);
2017 xfs_bmap_cancel(&free_list);
2021 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
2028 XFS_QM_DQRELE(mp, udqp);
2029 XFS_QM_DQRELE(mp, gdqp);
2032 * Propogate the fact that the vnode changed after the
2033 * xfs_inode locks have been released.
2035 VOP_VNODE_CHANGE(vp, VCHANGE_FLAGS_TRUNCATED, 3);
2039 /* Fallthrough to std_return with error = 0 */
2042 if ( (*vpp || (error != 0 && dm_event_sent != 0)) &&
2043 DM_EVENT_ENABLED(dir_vp->v_vfsp, XFS_BHVTOI(dir_bdp),
2044 DM_EVENT_POSTCREATE)) {
2045 (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTCREATE,
2046 dir_vp, DM_RIGHT_NULL,
2048 DM_RIGHT_NULL, name, NULL,
2049 dm_di_mode, error, 0);
2054 cancel_flags |= XFS_TRANS_ABORT;
2059 xfs_trans_cancel(tp, cancel_flags);
2061 if (!dp_joined_to_trans && (dp != NULL))
2062 xfs_iunlock(dp, XFS_ILOCK_EXCL);
2063 XFS_QM_DQRELE(mp, udqp);
2064 XFS_QM_DQRELE(mp, gdqp);
2070 * Wait until after the current transaction is aborted to
2071 * release the inode. This prevents recursive transactions
2072 * and deadlocks from xfs_inactive.
2074 cancel_flags |= XFS_TRANS_ABORT;
2075 xfs_trans_cancel(tp, cancel_flags);
2078 XFS_QM_DQRELE(mp, udqp);
2079 XFS_QM_DQRELE(mp, gdqp);
2086 * Some counters to see if (and how often) we are hitting some deadlock
2087 * prevention code paths.
2091 int xfs_rm_lock_delays;
2092 int xfs_rm_attempts;
2096 * The following routine will lock the inodes associated with the
2097 * directory and the named entry in the directory. The locks are
2098 * acquired in increasing inode number.
2100 * If the entry is "..", then only the directory is locked. The
2101 * vnode ref count will still include that from the .. entry in
2104 * There is a deadlock we need to worry about. If the locked directory is
2105 * in the AIL, it might be blocking up the log. The next inode we lock
2106 * could be already locked by another thread waiting for log space (e.g
2107 * a permanent log reservation with a long running transaction (see
2108 * xfs_itruncate_finish)). To solve this, we must check if the directory
2109 * is in the ail and use lock_nowait. If we can't lock, we need to
2110 * drop the inode lock on the directory and try again. xfs_iunlock will
2111 * potentially push the tail if we were holding up the log.
2114 xfs_lock_dir_and_entry(
2117 xfs_inode_t *ip) /* inode of entry 'name' */
2121 xfs_inode_t *ips[2];
2130 xfs_ilock(dp, XFS_ILOCK_EXCL);
2137 * We want to lock in increasing inum. Since we've already
2138 * acquired the lock on the directory, we may need to release
2139 * if if the inum of the entry turns out to be less.
2141 if (e_inum > dp->i_ino) {
2143 * We are already in the right order, so just
2144 * lock on the inode of the entry.
2145 * We need to use nowait if dp is in the AIL.
2148 lp = (xfs_log_item_t *)dp->i_itemp;
2149 if (lp && (lp->li_flags & XFS_LI_IN_AIL)) {
2150 if (!xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) {
2157 * Unlock dp and try again.
2158 * xfs_iunlock will try to push the tail
2159 * if the inode is in the AIL.
2162 xfs_iunlock(dp, XFS_ILOCK_EXCL);
2164 if ((attempts % 5) == 0) {
2165 delay(1); /* Don't just spin the CPU */
2167 xfs_rm_lock_delays++;
2173 xfs_ilock(ip, XFS_ILOCK_EXCL);
2175 } else if (e_inum < dp->i_ino) {
2176 xfs_iunlock(dp, XFS_ILOCK_EXCL);
2180 xfs_lock_inodes(ips, 2, 0, XFS_ILOCK_EXCL);
2182 /* else e_inum == dp->i_ino */
2183 /* This can happen if we're asked to lock /x/..
2184 * the entry is "..", which is also the parent directory.
2192 int xfs_small_retries;
2193 int xfs_middle_retries;
2194 int xfs_lots_retries;
2195 int xfs_lock_delays;
2199 * The following routine will lock n inodes in exclusive mode.
2200 * We assume the caller calls us with the inodes in i_ino order.
2202 * We need to detect deadlock where an inode that we lock
2203 * is in the AIL and we start waiting for another inode that is locked
2204 * by a thread in a long running transaction (such as truncate). This can
2205 * result in deadlock since the long running trans might need to wait
2206 * for the inode we just locked in order to push the tail and free space
2216 int attempts = 0, i, j, try_lock;
2219 ASSERT(ips && (inodes >= 2)); /* we need at least two */
2230 for (; i < inodes; i++) {
2233 if (i && (ips[i] == ips[i-1])) /* Already locked */
2237 * If try_lock is not set yet, make sure all locked inodes
2238 * are not in the AIL.
2239 * If any are, set try_lock to be used later.
2243 for (j = (i - 1); j >= 0 && !try_lock; j--) {
2244 lp = (xfs_log_item_t *)ips[j]->i_itemp;
2245 if (lp && (lp->li_flags & XFS_LI_IN_AIL)) {
2252 * If any of the previous locks we have locked is in the AIL,
2253 * we must TRY to get the second and subsequent locks. If
2254 * we can't get any, we must release all we have
2259 /* try_lock must be 0 if i is 0. */
2261 * try_lock means we have an inode locked
2262 * that is in the AIL.
2265 if (!xfs_ilock_nowait(ips[i], lock_mode)) {
2269 * Unlock all previous guys and try again.
2270 * xfs_iunlock will try to push the tail
2271 * if the inode is in the AIL.
2274 for(j = i - 1; j >= 0; j--) {
2277 * Check to see if we've already
2278 * unlocked this one.
2279 * Not the first one going back,
2280 * and the inode ptr is the same.
2282 if ((j != (i - 1)) && ips[j] ==
2286 xfs_iunlock(ips[j], lock_mode);
2289 if ((attempts % 5) == 0) {
2290 delay(1); /* Don't just spin the CPU */
2300 xfs_ilock(ips[i], lock_mode);
2306 if (attempts < 5) xfs_small_retries++;
2307 else if (attempts < 100) xfs_middle_retries++;
2308 else xfs_lots_retries++;
2316 #define REMOVE_DEBUG_TRACE(x) {remove_which_error_return = (x);}
2317 int remove_which_error_return = 0;
2319 #define REMOVE_DEBUG_TRACE(x)
2320 #endif /* ! DEBUG */
2329 bhv_desc_t *dir_bdp,
2334 char *name = VNAME(dentry);
2335 xfs_inode_t *dp, *ip;
2336 xfs_trans_t *tp = NULL;
2339 xfs_bmap_free_t free_list;
2340 xfs_fsblock_t first_block;
2348 dir_vp = BHV_TO_VNODE(dir_bdp);
2349 vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address);
2351 dp = XFS_BHVTOI(dir_bdp);
2354 if (XFS_FORCED_SHUTDOWN(mp))
2355 return XFS_ERROR(EIO);
2357 namelen = VNAMELEN(dentry);
2359 if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_REMOVE)) {
2360 error = XFS_SEND_NAMESP(mp, DM_EVENT_REMOVE, dir_vp,
2361 DM_RIGHT_NULL, NULL, DM_RIGHT_NULL,
2362 name, NULL, 0, 0, 0);
2367 /* From this point on, return through std_return */
2371 * We need to get a reference to ip before we get our log
2372 * reservation. The reason for this is that we cannot call
2373 * xfs_iget for an inode for which we do not have a reference
2374 * once we've acquired a log reservation. This is because the
2375 * inode we are trying to get might be in xfs_inactive going
2376 * for a log reservation. Since we'll have to wait for the
2377 * inactive code to complete before returning from xfs_iget,
2378 * we need to make sure that we don't have log space reserved
2379 * when we call xfs_iget. Instead we get an unlocked referece
2380 * to the inode before getting our log reservation.
2382 error = xfs_get_dir_entry(dentry, &ip);
2384 REMOVE_DEBUG_TRACE(__LINE__);
2388 dm_di_mode = ip->i_d.di_mode;
2390 vn_trace_entry(XFS_ITOV(ip), __FUNCTION__, (inst_t *)__return_address);
2394 error = XFS_QM_DQATTACH(mp, dp, 0);
2395 if (!error && dp != ip)
2396 error = XFS_QM_DQATTACH(mp, ip, 0);
2398 REMOVE_DEBUG_TRACE(__LINE__);
2403 tp = xfs_trans_alloc(mp, XFS_TRANS_REMOVE);
2404 cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
2406 * We try to get the real space reservation first,
2407 * allowing for directory btree deletion(s) implying
2408 * possible bmap insert(s). If we can't get the space
2409 * reservation then we use 0 instead, and avoid the bmap
2410 * btree insert(s) in the directory code by, if the bmap
2411 * insert tries to happen, instead trimming the LAST
2412 * block from the directory.
2414 resblks = XFS_REMOVE_SPACE_RES(mp);
2415 error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0,
2416 XFS_TRANS_PERM_LOG_RES, XFS_REMOVE_LOG_COUNT);
2417 if (error == ENOSPC) {
2419 error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0,
2420 XFS_TRANS_PERM_LOG_RES, XFS_REMOVE_LOG_COUNT);
2423 ASSERT(error != ENOSPC);
2424 REMOVE_DEBUG_TRACE(__LINE__);
2425 xfs_trans_cancel(tp, 0);
2430 error = xfs_lock_dir_and_entry(dp, dentry, ip);
2432 REMOVE_DEBUG_TRACE(__LINE__);
2433 xfs_trans_cancel(tp, cancel_flags);
2439 * At this point, we've gotten both the directory and the entry
2442 xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
2445 * Increment vnode ref count only in this case since
2446 * there's an extra vnode reference in the case where
2450 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
2453 if ((error = _MAC_XFS_IACCESS(ip, MACWRITE, credp))) {
2454 REMOVE_DEBUG_TRACE(__LINE__);
2459 * Entry must exist since we did a lookup in xfs_lock_dir_and_entry.
2461 XFS_BMAP_INIT(&free_list, &first_block);
2462 error = XFS_DIR_REMOVENAME(mp, tp, dp, name, namelen, ip->i_ino,
2463 &first_block, &free_list, 0);
2465 ASSERT(error != ENOENT);
2466 REMOVE_DEBUG_TRACE(__LINE__);
2469 xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
2472 xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
2474 error = xfs_droplink(tp, ip);
2476 REMOVE_DEBUG_TRACE(__LINE__);
2480 /* Determine if this is the last link while
2481 * we are in the transaction.
2483 link_zero = (ip)->i_d.di_nlink==0;
2486 * Take an extra ref on the inode so that it doesn't
2487 * go to xfs_inactive() from within the commit.
2492 * If this is a synchronous mount, make sure that the
2493 * remove transaction goes to disk before returning to
2496 if (mp->m_flags & XFS_MOUNT_WSYNC) {
2497 xfs_trans_set_sync(tp);
2500 error = xfs_bmap_finish(&tp, &free_list, first_block, &committed);
2502 REMOVE_DEBUG_TRACE(__LINE__);
2506 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
2513 * Before we drop our extra reference to the inode, purge it
2514 * from the refcache if it is there. By waiting until afterwards
2515 * to do the IRELE, we ensure that we won't go inactive in the
2516 * xfs_refcache_purge_ip routine (although that would be OK).
2518 xfs_refcache_purge_ip(ip);
2520 vn_trace_exit(XFS_ITOV(ip), __FUNCTION__, (inst_t *)__return_address);
2523 * Let interposed file systems know about removed links.
2525 VOP_LINK_REMOVED(XFS_ITOV(ip), dir_vp, link_zero);
2529 /* Fall through to std_return with error = 0 */
2531 if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp,
2532 DM_EVENT_POSTREMOVE)) {
2533 (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTREMOVE,
2534 dir_vp, DM_RIGHT_NULL,
2535 NULL, DM_RIGHT_NULL,
2536 name, NULL, dm_di_mode, error, 0);
2541 xfs_bmap_cancel(&free_list);
2542 cancel_flags |= XFS_TRANS_ABORT;
2545 xfs_trans_cancel(tp, cancel_flags);
2550 * In this case make sure to not release the inode until after
2551 * the current transaction is aborted. Releasing it beforehand
2552 * can cause us to go to xfs_inactive and start a recursive
2553 * transaction which can easily deadlock with the current one.
2555 xfs_bmap_cancel(&free_list);
2556 cancel_flags |= XFS_TRANS_ABORT;
2557 xfs_trans_cancel(tp, cancel_flags);
2560 * Before we drop our extra reference to the inode, purge it
2561 * from the refcache if it is there. By waiting until afterwards
2562 * to do the IRELE, we ensure that we won't go inactive in the
2563 * xfs_refcache_purge_ip routine (although that would be OK).
2565 xfs_refcache_purge_ip(ip);
2579 bhv_desc_t *target_dir_bdp,
2584 xfs_inode_t *tdp, *sip;
2587 xfs_inode_t *ips[2];
2589 xfs_bmap_free_t free_list;
2590 xfs_fsblock_t first_block;
2593 vnode_t *target_dir_vp;
2594 bhv_desc_t *src_bdp;
2596 char *target_name = VNAME(dentry);
2599 target_dir_vp = BHV_TO_VNODE(target_dir_bdp);
2600 vn_trace_entry(target_dir_vp, __FUNCTION__, (inst_t *)__return_address);
2601 vn_trace_entry(src_vp, __FUNCTION__, (inst_t *)__return_address);
2603 target_namelen = VNAMELEN(dentry);
2604 if (src_vp->v_type == VDIR)
2605 return XFS_ERROR(EPERM);
2608 * For now, manually find the XFS behavior descriptor for
2609 * the source vnode. If it doesn't exist then something
2610 * is wrong and we should just return an error.
2611 * Eventually we need to figure out how link is going to
2612 * work in the face of stacked vnodes.
2614 src_bdp = vn_bhv_lookup_unlocked(VN_BHV_HEAD(src_vp), &xfs_vnodeops);
2615 if (src_bdp == NULL) {
2616 return XFS_ERROR(EXDEV);
2618 sip = XFS_BHVTOI(src_bdp);
2619 tdp = XFS_BHVTOI(target_dir_bdp);
2621 if (XFS_FORCED_SHUTDOWN(mp))
2622 return XFS_ERROR(EIO);
2624 if (DM_EVENT_ENABLED(src_vp->v_vfsp, tdp, DM_EVENT_LINK)) {
2625 error = XFS_SEND_NAMESP(mp, DM_EVENT_LINK,
2626 target_dir_vp, DM_RIGHT_NULL,
2627 src_vp, DM_RIGHT_NULL,
2628 target_name, NULL, 0, 0, 0);
2633 /* Return through std_return after this point. */
2635 error = XFS_QM_DQATTACH(mp, sip, 0);
2636 if (!error && sip != tdp)
2637 error = XFS_QM_DQATTACH(mp, tdp, 0);
2641 tp = xfs_trans_alloc(mp, XFS_TRANS_LINK);
2642 cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
2643 resblks = XFS_LINK_SPACE_RES(mp, target_namelen);
2644 error = xfs_trans_reserve(tp, resblks, XFS_LINK_LOG_RES(mp), 0,
2645 XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT);
2646 if (error == ENOSPC) {
2648 error = xfs_trans_reserve(tp, 0, XFS_LINK_LOG_RES(mp), 0,
2649 XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT);
2656 if (sip->i_ino < tdp->i_ino) {
2664 xfs_lock_inodes(ips, 2, 0, XFS_ILOCK_EXCL);
2667 * Increment vnode ref counts since xfs_trans_commit &
2668 * xfs_trans_cancel will both unlock the inodes and
2669 * decrement the associated ref counts.
2672 VN_HOLD(target_dir_vp);
2673 xfs_trans_ijoin(tp, sip, XFS_ILOCK_EXCL);
2674 xfs_trans_ijoin(tp, tdp, XFS_ILOCK_EXCL);
2677 * If the source has too many links, we can't make any more to it.
2679 if (sip->i_d.di_nlink >= XFS_MAXLINK) {
2680 error = XFS_ERROR(EMLINK);
2685 (error = XFS_DIR_CANENTER(mp, tp, tdp, target_name,
2689 XFS_BMAP_INIT(&free_list, &first_block);
2691 error = XFS_DIR_CREATENAME(mp, tp, tdp, target_name, target_namelen,
2692 sip->i_ino, &first_block, &free_list,
2696 xfs_ichgtime(tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
2698 xfs_trans_log_inode(tp, tdp, XFS_ILOG_CORE);
2700 error = xfs_bumplink(tp, sip);
2706 * If this is a synchronous mount, make sure that the
2707 * link transaction goes to disk before returning to
2710 if (mp->m_flags & XFS_MOUNT_WSYNC) {
2711 xfs_trans_set_sync(tp);
2714 error = xfs_bmap_finish (&tp, &free_list, first_block, &committed);
2716 xfs_bmap_cancel(&free_list);
2720 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
2725 /* Fall through to std_return with error = 0. */
2727 if (DM_EVENT_ENABLED(src_vp->v_vfsp, sip,
2728 DM_EVENT_POSTLINK)) {
2729 (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTLINK,
2730 target_dir_vp, DM_RIGHT_NULL,
2731 src_vp, DM_RIGHT_NULL,
2732 target_name, NULL, 0, error, 0);
2737 cancel_flags |= XFS_TRANS_ABORT;
2740 xfs_trans_cancel(tp, cancel_flags);
2750 bhv_desc_t *dir_bdp,
2756 char *dir_name = VNAME(dentry);
2758 xfs_inode_t *cdp; /* inode of created dir */
2759 vnode_t *cvp; /* vnode of created dir */
2765 xfs_bmap_free_t free_list;
2766 xfs_fsblock_t first_block;
2768 boolean_t dp_joined_to_trans;
2769 boolean_t created = B_FALSE;
2770 int dm_event_sent = 0;
2772 struct xfs_dquot *udqp, *gdqp;
2777 dir_vp = BHV_TO_VNODE(dir_bdp);
2778 dp = XFS_BHVTOI(dir_bdp);
2781 if (XFS_FORCED_SHUTDOWN(mp))
2782 return XFS_ERROR(EIO);
2784 dir_namelen = VNAMELEN(dentry);
2787 dp_joined_to_trans = B_FALSE;
2788 dm_di_mode = vap->va_mode|VTTOIF(vap->va_type);
2790 if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_CREATE)) {
2791 error = XFS_SEND_NAMESP(mp, DM_EVENT_CREATE,
2792 dir_vp, DM_RIGHT_NULL, NULL,
2793 DM_RIGHT_NULL, dir_name, NULL,
2800 /* Return through std_return after this point. */
2802 vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address);
2806 if (vap->va_mask & XFS_AT_PROJID)
2807 prid = (xfs_prid_t)vap->va_projid;
2809 prid = (xfs_prid_t)dfltprid;
2812 * Make sure that we have allocated dquot(s) on disk.
2814 error = XFS_QM_DQVOPALLOC(mp, dp,
2815 current_fsuid(credp), current_fsgid(credp),
2816 XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp);
2820 tp = xfs_trans_alloc(mp, XFS_TRANS_MKDIR);
2821 cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
2822 resblks = XFS_MKDIR_SPACE_RES(mp, dir_namelen);
2823 error = xfs_trans_reserve(tp, resblks, XFS_MKDIR_LOG_RES(mp), 0,
2824 XFS_TRANS_PERM_LOG_RES, XFS_MKDIR_LOG_COUNT);
2825 if (error == ENOSPC) {
2827 error = xfs_trans_reserve(tp, 0, XFS_MKDIR_LOG_RES(mp), 0,
2828 XFS_TRANS_PERM_LOG_RES,
2829 XFS_MKDIR_LOG_COUNT);
2837 xfs_ilock(dp, XFS_ILOCK_EXCL);
2840 * Check for directory link count overflow.
2842 if (dp->i_d.di_nlink >= XFS_MAXLINK) {
2843 error = XFS_ERROR(EMLINK);
2848 * Reserve disk quota and the inode.
2850 error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0);
2855 (error = XFS_DIR_CANENTER(mp, tp, dp, dir_name, dir_namelen)))
2858 * create the directory inode.
2860 error = xfs_dir_ialloc(&tp, dp,
2861 MAKEIMODE(vap->va_type,vap->va_mode), 2,
2862 0, credp, prid, resblks > 0,
2865 if (error == ENOSPC)
2872 * Now we add the directory inode to the transaction.
2873 * We waited until now since xfs_dir_ialloc might start
2874 * a new transaction. Had we joined the transaction
2875 * earlier, the locks might have gotten released.
2878 xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
2879 dp_joined_to_trans = B_TRUE;
2881 XFS_BMAP_INIT(&free_list, &first_block);
2883 error = XFS_DIR_CREATENAME(mp, tp, dp, dir_name, dir_namelen,
2884 cdp->i_ino, &first_block, &free_list,
2885 resblks ? resblks - XFS_IALLOC_SPACE_RES(mp) : 0);
2887 ASSERT(error != ENOSPC);
2890 xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
2893 * Bump the in memory version number of the parent directory
2894 * so that other processes accessing it will recognize that
2895 * the directory has changed.
2899 error = XFS_DIR_INIT(mp, tp, cdp, dp);
2905 error = xfs_bumplink(tp, dp);
2910 cvp = XFS_ITOV(cdp);
2918 * Attach the dquots to the new inode and modify the icount incore.
2920 XFS_QM_DQVOPCREATE(mp, tp, cdp, udqp, gdqp);
2923 * If this is a synchronous mount, make sure that the
2924 * mkdir transaction goes to disk before returning to
2927 if (mp->m_flags & XFS_MOUNT_WSYNC) {
2928 xfs_trans_set_sync(tp);
2931 error = xfs_bmap_finish(&tp, &free_list, first_block, &committed);
2937 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
2938 XFS_QM_DQRELE(mp, udqp);
2939 XFS_QM_DQRELE(mp, gdqp);
2944 /* Fall through to std_return with error = 0 or errno from
2945 * xfs_trans_commit. */
2948 if ( (created || (error != 0 && dm_event_sent != 0)) &&
2949 DM_EVENT_ENABLED(dir_vp->v_vfsp, XFS_BHVTOI(dir_bdp),
2950 DM_EVENT_POSTCREATE)) {
2951 (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTCREATE,
2952 dir_vp, DM_RIGHT_NULL,
2953 created ? XFS_ITOV(cdp):NULL,
2956 dm_di_mode, error, 0);
2962 xfs_bmap_cancel(&free_list);
2964 cancel_flags |= XFS_TRANS_ABORT;
2966 xfs_trans_cancel(tp, cancel_flags);
2967 XFS_QM_DQRELE(mp, udqp);
2968 XFS_QM_DQRELE(mp, gdqp);
2970 if (!dp_joined_to_trans && (dp != NULL)) {
2971 xfs_iunlock(dp, XFS_ILOCK_EXCL);
2984 bhv_desc_t *dir_bdp,
2988 char *name = VNAME(dentry);
2990 xfs_inode_t *cdp; /* child directory */
2994 xfs_bmap_free_t free_list;
2995 xfs_fsblock_t first_block;
3004 dir_vp = BHV_TO_VNODE(dir_bdp);
3005 dp = XFS_BHVTOI(dir_bdp);
3008 vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address);
3010 if (XFS_FORCED_SHUTDOWN(XFS_BHVTOI(dir_bdp)->i_mount))
3011 return XFS_ERROR(EIO);
3012 namelen = VNAMELEN(dentry);
3014 if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_REMOVE)) {
3015 error = XFS_SEND_NAMESP(mp, DM_EVENT_REMOVE,
3016 dir_vp, DM_RIGHT_NULL,
3017 NULL, DM_RIGHT_NULL,
3018 name, NULL, 0, 0, 0);
3020 return XFS_ERROR(error);
3023 /* Return through std_return after this point. */
3028 * We need to get a reference to cdp before we get our log
3029 * reservation. The reason for this is that we cannot call
3030 * xfs_iget for an inode for which we do not have a reference
3031 * once we've acquired a log reservation. This is because the
3032 * inode we are trying to get might be in xfs_inactive going
3033 * for a log reservation. Since we'll have to wait for the
3034 * inactive code to complete before returning from xfs_iget,
3035 * we need to make sure that we don't have log space reserved
3036 * when we call xfs_iget. Instead we get an unlocked referece
3037 * to the inode before getting our log reservation.
3039 error = xfs_get_dir_entry(dentry, &cdp);
3041 REMOVE_DEBUG_TRACE(__LINE__);
3045 dm_di_mode = cdp->i_d.di_mode;
3048 * Get the dquots for the inodes.
3050 error = XFS_QM_DQATTACH(mp, dp, 0);
3051 if (!error && dp != cdp)
3052 error = XFS_QM_DQATTACH(mp, cdp, 0);
3055 REMOVE_DEBUG_TRACE(__LINE__);
3059 tp = xfs_trans_alloc(mp, XFS_TRANS_RMDIR);
3060 cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
3062 * We try to get the real space reservation first,
3063 * allowing for directory btree deletion(s) implying
3064 * possible bmap insert(s). If we can't get the space
3065 * reservation then we use 0 instead, and avoid the bmap
3066 * btree insert(s) in the directory code by, if the bmap
3067 * insert tries to happen, instead trimming the LAST
3068 * block from the directory.
3070 resblks = XFS_REMOVE_SPACE_RES(mp);
3071 error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0,
3072 XFS_TRANS_PERM_LOG_RES, XFS_DEFAULT_LOG_COUNT);
3073 if (error == ENOSPC) {
3075 error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0,
3076 XFS_TRANS_PERM_LOG_RES, XFS_DEFAULT_LOG_COUNT);
3079 ASSERT(error != ENOSPC);
3084 XFS_BMAP_INIT(&free_list, &first_block);
3087 * Now lock the child directory inode and the parent directory
3088 * inode in the proper order. This will take care of validating
3089 * that the directory entry for the child directory inode has
3090 * not changed while we were obtaining a log reservation.
3092 error = xfs_lock_dir_and_entry(dp, dentry, cdp);
3094 xfs_trans_cancel(tp, cancel_flags);
3099 xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
3102 * Only increment the parent directory vnode count if
3103 * we didn't bump it in looking up cdp. The only time
3104 * we don't bump it is when we're looking up ".".
3110 xfs_trans_ijoin(tp, cdp, XFS_ILOCK_EXCL);
3112 if ((error = _MAC_XFS_IACCESS(cdp, MACWRITE, credp))) {
3116 ASSERT(cdp->i_d.di_nlink >= 2);
3117 if (cdp->i_d.di_nlink != 2) {
3118 error = XFS_ERROR(ENOTEMPTY);
3121 if (!XFS_DIR_ISEMPTY(mp, cdp)) {
3122 error = XFS_ERROR(ENOTEMPTY);
3126 error = XFS_DIR_REMOVENAME(mp, tp, dp, name, namelen, cdp->i_ino,
3127 &first_block, &free_list, resblks);
3132 xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
3135 * Bump the in memory generation count on the parent
3136 * directory so that other can know that it has changed.
3141 * Drop the link from cdp's "..".
3143 error = xfs_droplink(tp, dp);
3149 * Drop the link from dp to cdp.
3151 error = xfs_droplink(tp, cdp);
3157 * Drop the "." link from cdp to self.
3159 error = xfs_droplink(tp, cdp);
3164 /* Determine these before committing transaction */
3165 last_cdp_link = (cdp)->i_d.di_nlink==0;
3168 * Take an extra ref on the child vnode so that it
3169 * does not go to xfs_inactive() from within the commit.
3174 * If this is a synchronous mount, make sure that the
3175 * rmdir transaction goes to disk before returning to
3178 if (mp->m_flags & XFS_MOUNT_WSYNC) {
3179 xfs_trans_set_sync(tp);
3182 error = xfs_bmap_finish (&tp, &free_list, first_block, &committed);
3184 xfs_bmap_cancel(&free_list);
3185 xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES |
3191 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
3199 * Let interposed file systems know about removed links.
3201 VOP_LINK_REMOVED(XFS_ITOV(cdp), dir_vp, last_cdp_link);
3205 /* Fall through to std_return with error = 0 or the errno
3206 * from xfs_trans_commit. */
3208 if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_POSTREMOVE)) {
3209 (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTREMOVE,
3210 dir_vp, DM_RIGHT_NULL,
3211 NULL, DM_RIGHT_NULL,
3212 name, NULL, dm_di_mode,
3218 xfs_bmap_cancel(&free_list);
3219 cancel_flags |= XFS_TRANS_ABORT;
3221 xfs_trans_cancel(tp, cancel_flags);
3229 * Read dp's entries starting at uiop->uio_offset and translate them into
3230 * bufsize bytes worth of struct dirents starting at bufbase.
3234 bhv_desc_t *dir_bdp,
3240 xfs_trans_t *tp = NULL;
3243 xfs_off_t start_offset;
3245 vn_trace_entry(BHV_TO_VNODE(dir_bdp), __FUNCTION__,
3246 (inst_t *)__return_address);
3247 dp = XFS_BHVTOI(dir_bdp);
3249 if (XFS_FORCED_SHUTDOWN(dp->i_mount)) {
3250 return XFS_ERROR(EIO);
3253 lock_mode = xfs_ilock_map_shared(dp);
3254 start_offset = uiop->uio_offset;
3255 error = XFS_DIR_GETDENTS(dp->i_mount, tp, dp, uiop, eofp);
3256 if (start_offset != uiop->uio_offset) {
3257 xfs_ichgtime(dp, XFS_ICHGTIME_ACC);
3259 xfs_iunlock_map_shared(dp, lock_mode);
3270 bhv_desc_t *dir_bdp,
3283 xfs_bmap_free_t free_list;
3284 xfs_fsblock_t first_block;
3285 boolean_t dp_joined_to_trans;
3289 xfs_fileoff_t first_fsb;
3290 xfs_filblks_t fs_blocks;
3292 xfs_bmbt_irec_t mval[SYMLINK_MAPS];
3299 struct xfs_dquot *udqp, *gdqp;
3301 char *link_name = VNAME(dentry);
3305 dir_vp = BHV_TO_VNODE(dir_bdp);
3306 dp = XFS_BHVTOI(dir_bdp);
3307 dp_joined_to_trans = B_FALSE;
3312 vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address);
3316 if (XFS_FORCED_SHUTDOWN(mp))
3317 return XFS_ERROR(EIO);
3319 link_namelen = VNAMELEN(dentry);
3322 * Check component lengths of the target path name.
3324 pathlen = strlen(target_path);
3325 if (pathlen >= MAXPATHLEN) /* total string too long */
3326 return XFS_ERROR(ENAMETOOLONG);
3327 if (pathlen >= MAXNAMELEN) { /* is any component too long? */
3331 for(total = 0, path = target_path; total < pathlen;) {
3335 while(*path == '/') {
3341 * Count up to the next slash or end of path.
3342 * Error out if the component is bigger than MAXNAMELEN.
3344 for(len = 0; *path != '/' && total < pathlen;total++, path++) {
3345 if (++len >= MAXNAMELEN) {
3346 error = ENAMETOOLONG;
3353 if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_SYMLINK)) {
3354 error = XFS_SEND_NAMESP(mp, DM_EVENT_SYMLINK, dir_vp,
3355 DM_RIGHT_NULL, NULL, DM_RIGHT_NULL,
3356 link_name, target_path, 0, 0, 0);
3361 /* Return through std_return after this point. */
3364 if (vap->va_mask & XFS_AT_PROJID)
3365 prid = (xfs_prid_t)vap->va_projid;
3367 prid = (xfs_prid_t)dfltprid;
3370 * Make sure that we have allocated dquot(s) on disk.
3372 error = XFS_QM_DQVOPALLOC(mp, dp,
3373 current_fsuid(credp), current_fsgid(credp),
3374 XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp);
3378 tp = xfs_trans_alloc(mp, XFS_TRANS_SYMLINK);
3379 cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
3381 * The symlink will fit into the inode data fork?
3382 * There can't be any attributes so we get the whole variable part.
3384 if (pathlen <= XFS_LITINO(mp))
3387 fs_blocks = XFS_B_TO_FSB(mp, pathlen);
3388 resblks = XFS_SYMLINK_SPACE_RES(mp, link_namelen, fs_blocks);
3389 error = xfs_trans_reserve(tp, resblks, XFS_SYMLINK_LOG_RES(mp), 0,
3390 XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT);
3391 if (error == ENOSPC && fs_blocks == 0) {
3393 error = xfs_trans_reserve(tp, 0, XFS_SYMLINK_LOG_RES(mp), 0,
3394 XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT);
3402 xfs_ilock(dp, XFS_ILOCK_EXCL);
3405 * Reserve disk quota : blocks and inode.
3407 error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0);
3412 * Check for ability to enter directory entry, if no space reserved.
3415 (error = XFS_DIR_CANENTER(mp, tp, dp, link_name, link_namelen)))
3418 * Initialize the bmap freelist prior to calling either
3419 * bmapi or the directory create code.
3421 XFS_BMAP_INIT(&free_list, &first_block);
3424 * Allocate an inode for the symlink.
3426 error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (vap->va_mode&~S_IFMT),
3427 1, 0, credp, prid, resblks > 0, &ip, NULL);
3429 if (error == ENOSPC)
3436 xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
3437 dp_joined_to_trans = B_TRUE;
3440 * Also attach the dquot(s) to it, if applicable.
3442 XFS_QM_DQVOPCREATE(mp, tp, ip, udqp, gdqp);
3445 resblks -= XFS_IALLOC_SPACE_RES(mp);
3447 * If the symlink will fit into the inode, write it inline.
3449 if (pathlen <= XFS_IFORK_DSIZE(ip)) {
3450 xfs_idata_realloc(ip, pathlen, XFS_DATA_FORK);
3451 memcpy(ip->i_df.if_u1.if_data, target_path, pathlen);
3452 ip->i_d.di_size = pathlen;
3455 * The inode was initially created in extent format.
3457 ip->i_df.if_flags &= ~(XFS_IFEXTENTS | XFS_IFBROOT);
3458 ip->i_df.if_flags |= XFS_IFINLINE;
3460 ip->i_d.di_format = XFS_DINODE_FMT_LOCAL;
3461 xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE);
3465 nmaps = SYMLINK_MAPS;
3467 error = xfs_bmapi(tp, ip, first_fsb, fs_blocks,
3468 XFS_BMAPI_WRITE | XFS_BMAPI_METADATA,
3469 &first_block, resblks, mval, &nmaps,
3476 resblks -= fs_blocks;
3477 ip->i_d.di_size = pathlen;
3478 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
3480 cur_chunk = target_path;
3481 for (n = 0; n < nmaps; n++) {
3482 d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock);
3483 byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount);
3484 bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d,
3485 BTOBB(byte_cnt), 0);
3486 ASSERT(bp && !XFS_BUF_GETERROR(bp));
3487 if (pathlen < byte_cnt) {
3490 pathlen -= byte_cnt;
3492 memcpy(XFS_BUF_PTR(bp), cur_chunk, byte_cnt);
3493 cur_chunk += byte_cnt;
3495 xfs_trans_log_buf(tp, bp, 0, byte_cnt - 1);
3500 * Create the directory entry for the symlink.
3502 error = XFS_DIR_CREATENAME(mp, tp, dp, link_name, link_namelen,
3503 ip->i_ino, &first_block, &free_list, resblks);
3507 xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
3508 xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
3511 * Bump the in memory version number of the parent directory
3512 * so that other processes accessing it will recognize that
3513 * the directory has changed.
3518 * If this is a synchronous mount, make sure that the
3519 * symlink transaction goes to disk before returning to
3522 if (mp->m_flags & XFS_MOUNT_WSYNC) {
3523 xfs_trans_set_sync(tp);
3527 * xfs_trans_commit normally decrements the vnode ref count
3528 * when it unlocks the inode. Since we want to return the
3529 * vnode to the caller, we bump the vnode ref count now.
3533 error = xfs_bmap_finish(&tp, &free_list, first_block, &committed);
3537 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
3538 XFS_QM_DQRELE(mp, udqp);
3539 XFS_QM_DQRELE(mp, gdqp);
3541 /* Fall through to std_return with error = 0 or errno from
3542 * xfs_trans_commit */
3544 if (DM_EVENT_ENABLED(dir_vp->v_vfsp, XFS_BHVTOI(dir_bdp),
3545 DM_EVENT_POSTSYMLINK)) {
3546 (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTSYMLINK,
3547 dir_vp, DM_RIGHT_NULL,
3548 error ? NULL : XFS_ITOV(ip),
3549 DM_RIGHT_NULL, link_name, target_path,
3565 xfs_bmap_cancel(&free_list);
3566 cancel_flags |= XFS_TRANS_ABORT;
3568 xfs_trans_cancel(tp, cancel_flags);
3569 XFS_QM_DQRELE(mp, udqp);
3570 XFS_QM_DQRELE(mp, gdqp);
3572 if (!dp_joined_to_trans && (dp != NULL)) {
3573 xfs_iunlock(dp, XFS_ILOCK_EXCL);
3583 * A fid routine that takes a pointer to a previously allocated
3584 * fid structure (like xfs_fast_fid) but uses a 64 bit inode number.
3594 vn_trace_entry(BHV_TO_VNODE(bdp), __FUNCTION__,
3595 (inst_t *)__return_address);
3596 ASSERT(sizeof(fid_t) >= sizeof(xfs_fid2_t));
3598 xfid = (xfs_fid2_t *)fidp;
3599 ip = XFS_BHVTOI(bdp);
3600 xfid->fid_len = sizeof(xfs_fid2_t) - sizeof(xfid->fid_len);
3603 * use memcpy because the inode is a long long and there's no
3604 * assurance that xfid->fid_ino is properly aligned.
3606 memcpy(&xfid->fid_ino, &ip->i_ino, sizeof(xfid->fid_ino));
3607 xfid->fid_gen = ip->i_d.di_gen;
3624 vp = BHV_TO_VNODE(bdp);
3625 if (vp->v_type == VDIR)
3627 ip = XFS_BHVTOI(bdp);
3628 if (locktype == VRWLOCK_WRITE) {
3629 xfs_ilock(ip, XFS_IOLOCK_EXCL);
3630 } else if (locktype == VRWLOCK_TRY_READ) {
3631 return (xfs_ilock_nowait(ip, XFS_IOLOCK_SHARED));
3632 } else if (locktype == VRWLOCK_TRY_WRITE) {
3633 return (xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL));
3635 ASSERT((locktype == VRWLOCK_READ) ||
3636 (locktype == VRWLOCK_WRITE_DIRECT));
3637 xfs_ilock(ip, XFS_IOLOCK_SHARED);
3655 vp = BHV_TO_VNODE(bdp);
3656 if (vp->v_type == VDIR)
3658 ip = XFS_BHVTOI(bdp);
3659 if (locktype == VRWLOCK_WRITE) {
3661 * In the write case, we may have added a new entry to
3662 * the reference cache. This might store a pointer to
3663 * an inode to be released in this inode. If it is there,
3664 * clear the pointer and release the inode after unlocking
3667 xfs_refcache_iunlock(ip, XFS_IOLOCK_EXCL);
3669 ASSERT((locktype == VRWLOCK_READ) ||
3670 (locktype == VRWLOCK_WRITE_DIRECT));
3671 xfs_iunlock(ip, XFS_IOLOCK_SHARED);
3685 ip = XFS_BHVTOI(bdp);
3688 if (XFS_FORCED_SHUTDOWN(mp))
3689 return XFS_ERROR(EIO);
3691 /* Bypass inodes which have already been cleaned by
3692 * the inode flush clustering code inside xfs_iflush
3694 if ((ip->i_update_core == 0) &&
3695 ((ip->i_itemp == NULL) ||
3696 !(ip->i_itemp->ili_format.ilf_fields & XFS_ILOG_ALL)))
3699 if (flags & FLUSH_LOG) {
3700 xfs_inode_log_item_t *iip = ip->i_itemp;
3702 if (iip && iip->ili_last_lsn) {
3703 xlog_t *log = mp->m_log;
3705 int s, log_flags = XFS_LOG_FORCE;
3707 s = GRANT_LOCK(log);
3708 sync_lsn = log->l_last_sync_lsn;
3709 GRANT_UNLOCK(log, s);
3711 if ((XFS_LSN_CMP(iip->ili_last_lsn, sync_lsn) <= 0))
3714 if (flags & FLUSH_SYNC)
3715 log_flags |= XFS_LOG_SYNC;
3716 return xfs_log_force(mp, iip->ili_last_lsn,
3721 /* We make this non-blocking if the inode is contended,
3722 * return EAGAIN to indicate to the caller that they
3723 * did not succeed. This prevents the flush path from
3724 * blocking on inodes inside another operation right
3725 * now, they get caught later by xfs_sync.
3727 if (flags & FLUSH_INODE) {
3730 if (xfs_ipincount(ip))
3733 if (flags & FLUSH_SYNC) {
3734 xfs_ilock(ip, XFS_ILOCK_SHARED);
3736 } else if (xfs_ilock_nowait(ip, XFS_ILOCK_SHARED)) {
3737 if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip)) {
3738 xfs_iunlock(ip, XFS_ILOCK_SHARED);
3745 if (flags & FLUSH_SYNC)
3746 flush_flags = XFS_IFLUSH_SYNC;
3748 flush_flags = XFS_IFLUSH_ASYNC;
3750 error = xfs_iflush(ip, flush_flags);
3751 xfs_iunlock(ip, XFS_ILOCK_SHARED);
3770 if (!capable(CAP_SYS_ADMIN))
3771 return XFS_ERROR(EPERM);
3773 ip = XFS_BHVTOI(bdp);
3776 if (XFS_FORCED_SHUTDOWN(mp))
3777 return XFS_ERROR(EIO);
3779 tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS);
3780 error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES (mp), 0, 0, 0);
3782 xfs_trans_cancel(tp, 0);
3785 xfs_ilock(ip, XFS_ILOCK_EXCL);
3786 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
3788 ip->i_iocore.io_dmevmask = ip->i_d.di_dmevmask = evmask;
3789 ip->i_iocore.io_dmstate = ip->i_d.di_dmstate = state;
3791 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
3793 error = xfs_trans_commit(tp, 0, NULL);
3809 vp = BHV_TO_VNODE(bdp);
3811 vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
3813 ASSERT(!VN_MAPPED(vp));
3814 ip = XFS_BHVTOI(bdp);
3816 if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) {
3817 if (ip->i_d.di_size > 0) {
3819 * Flush and invalidate any data left around that is
3820 * a part of this file.
3822 * Get the inode's i/o lock so that buffers are pushed
3823 * out while holding the proper lock. We can't hold
3824 * the inode lock here since flushing out buffers may
3825 * cause us to try to get the lock in xfs_strategy().
3827 * We don't have to call remapf() here, because there
3828 * cannot be any mapped file references to this vnode
3829 * since it is being reclaimed.
3831 xfs_ilock(ip, XFS_IOLOCK_EXCL);
3834 * If we hit an IO error, we need to make sure that the
3835 * buffer and page caches of file data for
3836 * the file are tossed away. We don't want to use
3837 * VOP_FLUSHINVAL_PAGES here because we don't want dirty
3838 * pages to stay attached to the vnode, but be
3839 * marked P_BAD. pdflush/vnode_pagebad
3842 if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) {
3843 VOP_FLUSHINVAL_PAGES(vp, 0, -1, FI_NONE);
3845 VOP_TOSS_PAGES(vp, 0, -1, FI_NONE);
3848 ASSERT(VN_CACHED(vp) == 0);
3849 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) ||
3850 ip->i_delayed_blks == 0);
3851 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
3852 } else if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
3854 * di_size field may not be quite accurate if we're
3857 VOP_TOSS_PAGES(vp, 0, -1, FI_NONE);
3858 ASSERT(VN_CACHED(vp) == 0);
3862 /* If we have nothing to flush with this inode then complete the
3863 * teardown now, otherwise break the link between the xfs inode
3864 * and the linux inode and clean up the xfs inode later. This
3865 * avoids flushing the inode to disk during the delete operation
3868 if (!ip->i_update_core && (ip->i_itemp == NULL)) {
3869 xfs_ilock(ip, XFS_ILOCK_EXCL);
3871 return xfs_finish_reclaim(ip, 1, XFS_IFLUSH_DELWRI_ELSE_SYNC);
3873 xfs_mount_t *mp = ip->i_mount;
3875 /* Protect sync from us */
3876 XFS_MOUNT_ILOCK(mp);
3877 vn_bhv_remove(VN_BHV_HEAD(vp), XFS_ITOBHV(ip));
3878 list_add_tail(&ip->i_reclaim, &mp->m_del_inodes);
3879 ip->i_flags |= XFS_IRECLAIMABLE;
3880 XFS_MOUNT_IUNLOCK(mp);
3891 xfs_ihash_t *ih = ip->i_hash;
3894 /* The hash lock here protects a thread in xfs_iget_core from
3895 * racing with us on linking the inode back with a vnode.
3896 * Once we have the XFS_IRECLAIM flag set it will not touch
3899 write_lock(&ih->ih_lock);
3900 if ((ip->i_flags & XFS_IRECLAIM) ||
3901 (!(ip->i_flags & XFS_IRECLAIMABLE) &&
3902 (XFS_ITOV_NULL(ip) == NULL))) {
3903 write_unlock(&ih->ih_lock);
3906 xfs_iunlock(ip, XFS_ILOCK_EXCL);
3910 ip->i_flags |= XFS_IRECLAIM;
3911 write_unlock(&ih->ih_lock);
3914 * If the inode is still dirty, then flush it out. If the inode
3915 * is not in the AIL, then it will be OK to flush it delwri as
3916 * long as xfs_iflush() does not keep any references to the inode.
3917 * We leave that decision up to xfs_iflush() since it has the
3918 * knowledge of whether it's OK to simply do a delwri flush of
3919 * the inode or whether we need to wait until the inode is
3920 * pulled from the AIL.
3921 * We get the flush lock regardless, though, just to make sure
3922 * we don't free it while it is being flushed.
3924 if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) {
3926 xfs_ilock(ip, XFS_ILOCK_EXCL);
3930 if (ip->i_update_core ||
3931 ((ip->i_itemp != NULL) &&
3932 (ip->i_itemp->ili_format.ilf_fields != 0))) {
3933 error = xfs_iflush(ip, sync_mode);
3935 * If we hit an error, typically because of filesystem
3936 * shutdown, we don't need to let vn_reclaim to know
3937 * because we're gonna reclaim the inode anyway.
3940 xfs_iunlock(ip, XFS_ILOCK_EXCL);
3944 xfs_iflock(ip); /* synchronize with xfs_iflush_done */
3947 ASSERT(ip->i_update_core == 0);
3948 ASSERT(ip->i_itemp == NULL ||
3949 ip->i_itemp->ili_format.ilf_fields == 0);
3950 xfs_iunlock(ip, XFS_ILOCK_EXCL);
3951 } else if (locked) {
3953 * We are not interested in doing an iflush if we're
3954 * in the process of shutting down the filesystem forcibly.
3955 * So, just reclaim the inode.
3958 xfs_iunlock(ip, XFS_ILOCK_EXCL);
3966 xfs_finish_reclaim_all(xfs_mount_t *mp, int noblock)
3969 struct list_head *curr, *next;
3975 XFS_MOUNT_ILOCK(mp);
3976 list_for_each_safe(curr, next, &mp->m_del_inodes) {
3977 ip = list_entry(curr, xfs_inode_t, i_reclaim);
3979 if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0)
3981 if (xfs_ipincount(ip) ||
3982 !xfs_iflock_nowait(ip)) {
3983 xfs_iunlock(ip, XFS_ILOCK_EXCL);
3987 XFS_MOUNT_IUNLOCK(mp);
3988 xfs_finish_reclaim(ip, noblock,
3989 XFS_IFLUSH_DELWRI_ELSE_ASYNC);
3997 XFS_MOUNT_IUNLOCK(mp);
4002 * xfs_alloc_file_space()
4003 * This routine allocates disk space for the given file.
4005 * If alloc_type == 0, this request is for an ALLOCSP type
4006 * request which will change the file size. In this case, no
4007 * DMAPI event will be generated by the call. A TRUNCATE event
4008 * will be generated later by xfs_setattr.
4010 * If alloc_type != 0, this request is for a RESVSP type
4011 * request, and a DMAPI DM_EVENT_WRITE will be generated if the
4012 * lower block boundary byte address is less than the file's
4021 xfs_alloc_file_space(
4028 xfs_filblks_t allocated_fsb;
4029 xfs_filblks_t allocatesize_fsb;
4032 xfs_filblks_t datablocks;
4034 xfs_fsblock_t firstfsb;
4035 xfs_bmap_free_t free_list;
4036 xfs_bmbt_irec_t *imapp;
4037 xfs_bmbt_irec_t imaps[1];
4044 xfs_fileoff_t startoffset_fsb;
4046 int xfs_bmapi_flags;
4048 vn_trace_entry(XFS_ITOV(ip), __FUNCTION__, (inst_t *)__return_address);
4051 if (XFS_FORCED_SHUTDOWN(mp))
4052 return XFS_ERROR(EIO);
4055 * determine if this is a realtime file
4057 if ((rt = XFS_IS_REALTIME_INODE(ip)) != 0) {
4058 if (ip->i_d.di_extsize)
4059 rtextsize = ip->i_d.di_extsize;
4061 rtextsize = mp->m_sb.sb_rextsize;
4065 if ((error = XFS_QM_DQATTACH(mp, ip, 0)))
4069 return XFS_ERROR(EINVAL);
4075 xfs_bmapi_flags = XFS_BMAPI_WRITE | (alloc_type ? XFS_BMAPI_PREALLOC : 0);
4076 startoffset_fsb = XFS_B_TO_FSBT(mp, offset);
4077 allocatesize_fsb = XFS_B_TO_FSB(mp, count);
4079 /* Generate a DMAPI event if needed. */
4080 if (alloc_type != 0 && offset < ip->i_d.di_size &&
4081 (attr_flags&ATTR_DMI) == 0 &&
4082 DM_EVENT_ENABLED(XFS_MTOVFS(mp), ip, DM_EVENT_WRITE)) {
4083 xfs_off_t end_dmi_offset;
4085 end_dmi_offset = offset+len;
4086 if (end_dmi_offset > ip->i_d.di_size)
4087 end_dmi_offset = ip->i_d.di_size;
4088 error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, XFS_ITOV(ip),
4089 offset, end_dmi_offset - offset,
4096 * allocate file space until done or until there is an error
4099 while (allocatesize_fsb && !error) {
4101 * determine if reserving space on
4102 * the data or realtime partition.
4107 s = startoffset_fsb;
4108 do_div(s, rtextsize);
4110 e = roundup_64(startoffset_fsb + allocatesize_fsb,
4112 numrtextents = (int)(e - s) / mp->m_sb.sb_rextsize;
4115 datablocks = allocatesize_fsb;
4120 * allocate and setup the transaction
4122 tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT);
4123 resblks = XFS_DIOSTRAT_SPACE_RES(mp, datablocks);
4124 error = xfs_trans_reserve(tp,
4126 XFS_WRITE_LOG_RES(mp),
4128 XFS_TRANS_PERM_LOG_RES,
4129 XFS_WRITE_LOG_COUNT);
4132 * check for running out of space
4136 * Free the transaction structure.
4138 ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp));
4139 xfs_trans_cancel(tp, 0);
4142 xfs_ilock(ip, XFS_ILOCK_EXCL);
4143 error = XFS_TRANS_RESERVE_QUOTA_BYDQUOTS(mp, tp,
4144 ip->i_udquot, ip->i_gdquot, resblks, 0, rt ?
4145 XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS);
4149 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
4150 xfs_trans_ihold(tp, ip);
4153 * issue the bmapi() call to allocate the blocks
4155 XFS_BMAP_INIT(&free_list, &firstfsb);
4156 error = xfs_bmapi(tp, ip, startoffset_fsb,
4157 allocatesize_fsb, xfs_bmapi_flags,
4158 &firstfsb, 0, imapp, &reccount,
4165 * complete the transaction
4167 error = xfs_bmap_finish(&tp, &free_list, firstfsb, &committed);
4172 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
4173 xfs_iunlock(ip, XFS_ILOCK_EXCL);
4178 allocated_fsb = imapp->br_blockcount;
4180 if (reccount == 0) {
4181 error = XFS_ERROR(ENOSPC);
4185 startoffset_fsb += allocated_fsb;
4186 allocatesize_fsb -= allocated_fsb;
4189 if (error == ENOSPC && (attr_flags&ATTR_DMI) == 0 &&
4190 DM_EVENT_ENABLED(XFS_MTOVFS(mp), ip, DM_EVENT_NOSPACE)) {
4192 error = XFS_SEND_NAMESP(mp, DM_EVENT_NOSPACE,
4193 XFS_ITOV(ip), DM_RIGHT_NULL,
4194 XFS_ITOV(ip), DM_RIGHT_NULL,
4195 NULL, NULL, 0, 0, 0); /* Delay flag intentionally unused */
4197 goto retry; /* Maybe DMAPI app. has made space */
4198 /* else fall through with error from XFS_SEND_DATA */
4204 xfs_bmap_cancel(&free_list);
4206 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
4207 xfs_iunlock(ip, XFS_ILOCK_EXCL);
4208 goto dmapi_enospc_check;
4212 * Zero file bytes between startoff and endoff inclusive.
4213 * The iolock is held exclusive and no blocks are buffered.
4216 xfs_zero_remaining_bytes(
4221 xfs_bmbt_irec_t imap;
4222 xfs_fileoff_t offset_fsb;
4223 xfs_off_t lastoffset;
4226 xfs_mount_t *mp = ip->i_mount;
4230 bp = xfs_buf_get_noaddr(mp->m_sb.sb_blocksize,
4231 ip->i_d.di_flags & XFS_DIFLAG_REALTIME ?
4232 mp->m_rtdev_targp : mp->m_ddev_targp);
4234 for (offset = startoff; offset <= endoff; offset = lastoffset + 1) {
4235 offset_fsb = XFS_B_TO_FSBT(mp, offset);
4237 error = xfs_bmapi(NULL, ip, offset_fsb, 1, 0, NULL, 0, &imap,
4239 if (error || nimap < 1)
4241 ASSERT(imap.br_blockcount >= 1);
4242 ASSERT(imap.br_startoff == offset_fsb);
4243 lastoffset = XFS_FSB_TO_B(mp, imap.br_startoff + 1) - 1;
4244 if (lastoffset > endoff)
4245 lastoffset = endoff;
4246 if (imap.br_startblock == HOLESTARTBLOCK)
4248 ASSERT(imap.br_startblock != DELAYSTARTBLOCK);
4249 if (imap.br_state == XFS_EXT_UNWRITTEN)
4252 XFS_BUF_UNWRITE(bp);
4254 XFS_BUF_SET_ADDR(bp, XFS_FSB_TO_DB(ip, imap.br_startblock));
4256 if ((error = xfs_iowait(bp))) {
4257 xfs_ioerror_alert("xfs_zero_remaining_bytes(read)",
4258 mp, bp, XFS_BUF_ADDR(bp));
4261 memset(XFS_BUF_PTR(bp) +
4262 (offset - XFS_FSB_TO_B(mp, imap.br_startoff)),
4263 0, lastoffset - offset + 1);
4268 if ((error = xfs_iowait(bp))) {
4269 xfs_ioerror_alert("xfs_zero_remaining_bytes(write)",
4270 mp, bp, XFS_BUF_ADDR(bp));
4279 * xfs_free_file_space()
4280 * This routine frees disk space for the given file.
4282 * This routine is only called by xfs_change_file_space
4283 * for an UNRESVSP type call.
4291 xfs_free_file_space(
4299 xfs_off_t end_dmi_offset;
4300 xfs_fileoff_t endoffset_fsb;
4302 xfs_fsblock_t firstfsb;
4303 xfs_bmap_free_t free_list;
4305 xfs_bmbt_irec_t imap;
4313 xfs_fileoff_t startoffset_fsb;
4316 vn_trace_entry(XFS_ITOV(ip), __FUNCTION__, (inst_t *)__return_address);
4319 if ((error = XFS_QM_DQATTACH(mp, ip, 0)))
4323 if (len <= 0) /* if nothing being freed */
4325 rt = (ip->i_d.di_flags & XFS_DIFLAG_REALTIME);
4326 startoffset_fsb = XFS_B_TO_FSB(mp, offset);
4327 end_dmi_offset = offset + len;
4328 endoffset_fsb = XFS_B_TO_FSBT(mp, end_dmi_offset);
4330 if (offset < ip->i_d.di_size &&
4331 (attr_flags & ATTR_DMI) == 0 &&
4332 DM_EVENT_ENABLED(XFS_MTOVFS(mp), ip, DM_EVENT_WRITE)) {
4333 if (end_dmi_offset > ip->i_d.di_size)
4334 end_dmi_offset = ip->i_d.di_size;
4335 error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, XFS_ITOV(ip),
4336 offset, end_dmi_offset - offset,
4337 AT_DELAY_FLAG(attr_flags), NULL);
4342 xfs_ilock(ip, XFS_IOLOCK_EXCL);
4343 rounding = MAX((__uint8_t)(1 << mp->m_sb.sb_blocklog),
4345 ilen = len + (offset & (rounding - 1));
4346 ioffset = offset & ~(rounding - 1);
4347 if (ilen & (rounding - 1))
4348 ilen = (ilen + rounding) & ~(rounding - 1);
4349 xfs_inval_cached_pages(XFS_ITOV(ip), &(ip->i_iocore), ioffset, 0, 0);
4351 * Need to zero the stuff we're not freeing, on disk.
4352 * If its a realtime file & can't use unwritten extents then we
4353 * actually need to zero the extent edges. Otherwise xfs_bunmapi
4354 * will take care of it for us.
4356 if (rt && !XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb)) {
4358 error = xfs_bmapi(NULL, ip, startoffset_fsb, 1, 0, NULL, 0,
4359 &imap, &nimap, NULL);
4362 ASSERT(nimap == 0 || nimap == 1);
4363 if (nimap && imap.br_startblock != HOLESTARTBLOCK) {
4366 ASSERT(imap.br_startblock != DELAYSTARTBLOCK);
4367 block = imap.br_startblock;
4368 mod = do_div(block, mp->m_sb.sb_rextsize);
4370 startoffset_fsb += mp->m_sb.sb_rextsize - mod;
4373 error = xfs_bmapi(NULL, ip, endoffset_fsb - 1, 1, 0, NULL, 0,
4374 &imap, &nimap, NULL);
4377 ASSERT(nimap == 0 || nimap == 1);
4378 if (nimap && imap.br_startblock != HOLESTARTBLOCK) {
4379 ASSERT(imap.br_startblock != DELAYSTARTBLOCK);
4381 if (mod && (mod != mp->m_sb.sb_rextsize))
4382 endoffset_fsb -= mod;
4385 if ((done = (endoffset_fsb <= startoffset_fsb)))
4387 * One contiguous piece to clear
4389 error = xfs_zero_remaining_bytes(ip, offset, offset + len - 1);
4392 * Some full blocks, possibly two pieces to clear
4394 if (offset < XFS_FSB_TO_B(mp, startoffset_fsb))
4395 error = xfs_zero_remaining_bytes(ip, offset,
4396 XFS_FSB_TO_B(mp, startoffset_fsb) - 1);
4398 XFS_FSB_TO_B(mp, endoffset_fsb) < offset + len)
4399 error = xfs_zero_remaining_bytes(ip,
4400 XFS_FSB_TO_B(mp, endoffset_fsb),
4405 * free file space until done or until there is an error
4407 resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0);
4408 while (!error && !done) {
4411 * allocate and setup the transaction
4413 tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT);
4414 error = xfs_trans_reserve(tp,
4416 XFS_WRITE_LOG_RES(mp),
4418 XFS_TRANS_PERM_LOG_RES,
4419 XFS_WRITE_LOG_COUNT);
4422 * check for running out of space
4426 * Free the transaction structure.
4428 ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp));
4429 xfs_trans_cancel(tp, 0);
4432 xfs_ilock(ip, XFS_ILOCK_EXCL);
4433 error = XFS_TRANS_RESERVE_QUOTA(mp, tp,
4434 ip->i_udquot, ip->i_gdquot, resblks, 0, rt ?
4435 XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS);
4439 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
4440 xfs_trans_ihold(tp, ip);
4443 * issue the bunmapi() call to free the blocks
4445 XFS_BMAP_INIT(&free_list, &firstfsb);
4446 error = xfs_bunmapi(tp, ip, startoffset_fsb,
4447 endoffset_fsb - startoffset_fsb,
4448 0, 2, &firstfsb, &free_list, &done);
4454 * complete the transaction
4456 error = xfs_bmap_finish(&tp, &free_list, firstfsb, &committed);
4461 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
4462 xfs_iunlock(ip, XFS_ILOCK_EXCL);
4465 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
4469 xfs_bmap_cancel(&free_list);
4471 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
4472 xfs_iunlock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
4477 * xfs_change_file_space()
4478 * This routine allocates or frees disk space for the given file.
4479 * The user specified parameters are checked for alignment and size
4488 xfs_change_file_space(
4502 xfs_off_t startoffset;
4508 vp = BHV_TO_VNODE(bdp);
4509 vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
4511 ip = XFS_BHVTOI(bdp);
4515 * must be a regular file and have write permission
4517 if (vp->v_type != VREG)
4518 return XFS_ERROR(EINVAL);
4520 xfs_ilock(ip, XFS_ILOCK_SHARED);
4522 if ((error = xfs_iaccess(ip, S_IWUSR, credp))) {
4523 xfs_iunlock(ip, XFS_ILOCK_SHARED);
4527 xfs_iunlock(ip, XFS_ILOCK_SHARED);
4529 switch (bf->l_whence) {
4530 case 0: /*SEEK_SET*/
4532 case 1: /*SEEK_CUR*/
4533 bf->l_start += offset;
4535 case 2: /*SEEK_END*/
4536 bf->l_start += ip->i_d.di_size;
4539 return XFS_ERROR(EINVAL);
4542 llen = bf->l_len > 0 ? bf->l_len - 1 : bf->l_len;
4544 if ( (bf->l_start < 0)
4545 || (bf->l_start > XFS_MAXIOFFSET(mp))
4546 || (bf->l_start + llen < 0)
4547 || (bf->l_start + llen > XFS_MAXIOFFSET(mp)))
4548 return XFS_ERROR(EINVAL);
4552 startoffset = bf->l_start;
4553 fsize = ip->i_d.di_size;
4556 * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve
4558 * These calls do NOT zero the data space allocated to the file,
4559 * nor do they change the file size.
4561 * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file
4563 * These calls cause the new file data to be zeroed and the file
4564 * size to be changed.
4566 setprealloc = clrprealloc = 0;
4569 case XFS_IOC_RESVSP:
4570 case XFS_IOC_RESVSP64:
4571 error = xfs_alloc_file_space(ip, startoffset, bf->l_len,
4578 case XFS_IOC_UNRESVSP:
4579 case XFS_IOC_UNRESVSP64:
4580 if ((error = xfs_free_file_space(ip, startoffset, bf->l_len,
4585 case XFS_IOC_ALLOCSP:
4586 case XFS_IOC_ALLOCSP64:
4587 case XFS_IOC_FREESP:
4588 case XFS_IOC_FREESP64:
4589 if (startoffset > fsize) {
4590 error = xfs_alloc_file_space(ip, fsize,
4591 startoffset - fsize, 0, attr_flags);
4596 va.va_mask = XFS_AT_SIZE;
4597 va.va_size = startoffset;
4599 error = xfs_setattr(bdp, &va, attr_flags, credp);
4609 return XFS_ERROR(EINVAL);
4613 * update the inode timestamp, mode, and prealloc flag bits
4615 tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID);
4617 if ((error = xfs_trans_reserve(tp, 0, XFS_WRITEID_LOG_RES(mp),
4620 xfs_trans_cancel(tp, 0);
4624 xfs_ilock(ip, XFS_ILOCK_EXCL);
4626 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
4627 xfs_trans_ihold(tp, ip);
4629 ip->i_d.di_mode &= ~S_ISUID;
4632 * Note that we don't have to worry about mandatory
4633 * file locking being disabled here because we only
4634 * clear the S_ISGID bit if the Group execute bit is
4635 * on, but if it was on then mandatory locking wouldn't
4636 * have been enabled.
4638 if (ip->i_d.di_mode & S_IXGRP)
4639 ip->i_d.di_mode &= ~S_ISGID;
4641 xfs_ichgtime(ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
4644 ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC;
4645 else if (clrprealloc)
4646 ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC;
4648 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
4649 xfs_trans_set_sync(tp);
4651 error = xfs_trans_commit(tp, 0, NULL);
4653 xfs_iunlock(ip, XFS_ILOCK_EXCL);
4658 vnodeops_t xfs_vnodeops = {
4659 BHV_IDENTITY_INIT(VN_BHV_XFS,VNODE_POSITION_XFS),
4660 .vop_open = xfs_open,
4661 .vop_read = xfs_read,
4662 #ifdef HAVE_SENDFILE
4663 .vop_sendfile = xfs_sendfile,
4665 .vop_write = xfs_write,
4666 .vop_ioctl = xfs_ioctl,
4667 .vop_getattr = xfs_getattr,
4668 .vop_setattr = xfs_setattr,
4669 .vop_access = xfs_access,
4670 .vop_lookup = xfs_lookup,
4671 .vop_create = xfs_create,
4672 .vop_remove = xfs_remove,
4673 .vop_link = xfs_link,
4674 .vop_rename = xfs_rename,
4675 .vop_mkdir = xfs_mkdir,
4676 .vop_rmdir = xfs_rmdir,
4677 .vop_readdir = xfs_readdir,
4678 .vop_symlink = xfs_symlink,
4679 .vop_readlink = xfs_readlink,
4680 .vop_fsync = xfs_fsync,
4681 .vop_inactive = xfs_inactive,
4682 .vop_fid2 = xfs_fid2,
4683 .vop_rwlock = xfs_rwlock,
4684 .vop_rwunlock = xfs_rwunlock,
4685 .vop_bmap = xfs_bmap,
4686 .vop_reclaim = xfs_reclaim,
4687 .vop_attr_get = xfs_attr_get,
4688 .vop_attr_set = xfs_attr_set,
4689 .vop_attr_remove = xfs_attr_remove,
4690 .vop_attr_list = xfs_attr_list,
4691 .vop_link_removed = (vop_link_removed_t)fs_noval,
4692 .vop_vnode_change = (vop_vnode_change_t)fs_noval,
4693 .vop_tosspages = fs_tosspages,
4694 .vop_flushinval_pages = fs_flushinval_pages,
4695 .vop_flush_pages = fs_flush_pages,
4696 .vop_release = xfs_release,
4697 .vop_iflush = xfs_inode_flush,