patch-2.4.25 linux-2.4.25/fs/xfs/xfs_vnodeops.c
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- Lines: 4807
- Date:
2004-02-18 05:36:32.000000000 -0800
- Orig file:
linux-2.4.24/fs/xfs/xfs_vnodeops.c
- Orig date:
1969-12-31 16:00:00.000000000 -0800
diff -urN linux-2.4.24/fs/xfs/xfs_vnodeops.c linux-2.4.25/fs/xfs/xfs_vnodeops.c
@@ -0,0 +1,4806 @@
+/*
+ * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like. Any license provided herein, whether implied or
+ * otherwise, applies only to this software file. Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA 94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+
+#include "xfs.h"
+#include "xfs_macros.h"
+#include "xfs_types.h"
+#include "xfs_inum.h"
+#include "xfs_log.h"
+#include "xfs_trans.h"
+#include "xfs_sb.h"
+#include "xfs_ag.h"
+#include "xfs_dir.h"
+#include "xfs_dir2.h"
+#include "xfs_dmapi.h"
+#include "xfs_mount.h"
+#include "xfs_alloc_btree.h"
+#include "xfs_bmap_btree.h"
+#include "xfs_ialloc_btree.h"
+#include "xfs_itable.h"
+#include "xfs_btree.h"
+#include "xfs_ialloc.h"
+#include "xfs_alloc.h"
+#include "xfs_attr_sf.h"
+#include "xfs_dir_sf.h"
+#include "xfs_dir2_sf.h"
+#include "xfs_dinode.h"
+#include "xfs_inode_item.h"
+#include "xfs_inode.h"
+#include "xfs_bmap.h"
+#include "xfs_da_btree.h"
+#include "xfs_attr.h"
+#include "xfs_rw.h"
+#include "xfs_refcache.h"
+#include "xfs_error.h"
+#include "xfs_bit.h"
+#include "xfs_rtalloc.h"
+#include "xfs_quota.h"
+#include "xfs_utils.h"
+#include "xfs_trans_space.h"
+#include "xfs_dir_leaf.h"
+#include "xfs_mac.h"
+#include "xfs_log_priv.h"
+
+
+/*
+ * The maximum pathlen is 1024 bytes. Since the minimum file system
+ * blocksize is 512 bytes, we can get a max of 2 extents back from
+ * bmapi.
+ */
+#define SYMLINK_MAPS 2
+
+/*
+ * For xfs, we check that the file isn't too big to be opened by this kernel.
+ * No other open action is required for regular files. Devices are handled
+ * through the specfs file system, pipes through fifofs. Device and
+ * fifo vnodes are "wrapped" by specfs and fifofs vnodes, respectively,
+ * when a new vnode is first looked up or created.
+ */
+STATIC int
+xfs_open(
+ bhv_desc_t *bdp,
+ cred_t *credp)
+{
+ int mode;
+ vnode_t *vp;
+ xfs_inode_t *ip;
+
+ vp = BHV_TO_VNODE(bdp);
+ ip = XFS_BHVTOI(bdp);
+
+ if (XFS_FORCED_SHUTDOWN(ip->i_mount))
+ return XFS_ERROR(EIO);
+
+ /*
+ * If it's a directory with any blocks, read-ahead block 0
+ * as we're almost certain to have the next operation be a read there.
+ */
+ if (vp->v_type == VDIR && ip->i_d.di_nextents > 0) {
+ mode = xfs_ilock_map_shared(ip);
+ if (ip->i_d.di_nextents > 0)
+ (void)xfs_da_reada_buf(NULL, ip, 0, XFS_DATA_FORK);
+ xfs_iunlock(ip, mode);
+ }
+ return 0;
+}
+
+
+/*
+ * xfs_getattr
+ */
+STATIC int
+xfs_getattr(
+ bhv_desc_t *bdp,
+ vattr_t *vap,
+ int flags,
+ cred_t *credp)
+{
+ xfs_inode_t *ip;
+ xfs_mount_t *mp;
+ vnode_t *vp;
+
+ vp = BHV_TO_VNODE(bdp);
+ vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
+
+ ip = XFS_BHVTOI(bdp);
+ mp = ip->i_mount;
+
+ if (XFS_FORCED_SHUTDOWN(mp))
+ return XFS_ERROR(EIO);
+
+ if (!(flags & ATTR_LAZY))
+ xfs_ilock(ip, XFS_ILOCK_SHARED);
+
+ vap->va_size = ip->i_d.di_size;
+ if (vap->va_mask == XFS_AT_SIZE)
+ goto all_done;
+
+ vap->va_nblocks =
+ XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
+ vap->va_nodeid = ip->i_ino;
+#if XFS_BIG_INUMS
+ vap->va_nodeid += mp->m_inoadd;
+#endif
+ vap->va_nlink = ip->i_d.di_nlink;
+
+ /*
+ * Quick exit for non-stat callers
+ */
+ if ((vap->va_mask &
+ ~(XFS_AT_SIZE|XFS_AT_FSID|XFS_AT_NODEID|
+ XFS_AT_NLINK|XFS_AT_BLKSIZE)) == 0)
+ goto all_done;
+
+ /*
+ * Copy from in-core inode.
+ */
+ vap->va_type = vp->v_type;
+ vap->va_mode = ip->i_d.di_mode & MODEMASK;
+ vap->va_uid = ip->i_d.di_uid;
+ vap->va_gid = ip->i_d.di_gid;
+ vap->va_projid = ip->i_d.di_projid;
+
+ /*
+ * Check vnode type block/char vs. everything else.
+ * Do it with bitmask because that's faster than looking
+ * for multiple values individually.
+ */
+ if (((1 << vp->v_type) & ((1<<VBLK) | (1<<VCHR))) == 0) {
+ vap->va_rdev = 0;
+
+ if (!(ip->i_d.di_flags & XFS_DIFLAG_REALTIME)) {
+
+#if 0
+ /* Large block sizes confuse various
+ * user space programs, so letting the
+ * stripe size through is not a good
+ * idea for now.
+ */
+ vap->va_blocksize = mp->m_swidth ?
+ /*
+ * If the underlying volume is a stripe, then
+ * return the stripe width in bytes as the
+ * recommended I/O size.
+ */
+ (mp->m_swidth << mp->m_sb.sb_blocklog) :
+ /*
+ * Return the largest of the preferred buffer
+ * sizes since doing small I/Os into larger
+ * buffers causes buffers to be decommissioned.
+ * The value returned is in bytes.
+ */
+ (1 << (int)MAX(mp->m_readio_log,
+ mp->m_writeio_log));
+
+#else
+ vap->va_blocksize =
+ /*
+ * Return the largest of the preferred buffer
+ * sizes since doing small I/Os into larger
+ * buffers causes buffers to be decommissioned.
+ * The value returned is in bytes.
+ */
+ 1 << (int)MAX(mp->m_readio_log,
+ mp->m_writeio_log);
+#endif
+ } else {
+
+ /*
+ * If the file blocks are being allocated from a
+ * realtime partition, then return the inode's
+ * realtime extent size or the realtime volume's
+ * extent size.
+ */
+ vap->va_blocksize = ip->i_d.di_extsize ?
+ (ip->i_d.di_extsize << mp->m_sb.sb_blocklog) :
+ (mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog);
+ }
+ } else {
+ vap->va_rdev = ip->i_df.if_u2.if_rdev;
+ vap->va_blocksize = BLKDEV_IOSIZE;
+ }
+
+ vap->va_atime.tv_sec = ip->i_d.di_atime.t_sec;
+ vap->va_atime.tv_nsec = ip->i_d.di_atime.t_nsec;
+ vap->va_mtime.tv_sec = ip->i_d.di_mtime.t_sec;
+ vap->va_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
+ vap->va_ctime.tv_sec = ip->i_d.di_ctime.t_sec;
+ vap->va_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
+
+ /*
+ * Exit for stat callers. See if any of the rest of the fields
+ * to be filled in are needed.
+ */
+ if ((vap->va_mask &
+ (XFS_AT_XFLAGS|XFS_AT_EXTSIZE|XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS|
+ XFS_AT_GENCOUNT|XFS_AT_VCODE)) == 0)
+ goto all_done;
+
+ /*
+ * convert di_flags to xflags
+ */
+ vap->va_xflags = 0;
+ if (ip->i_d.di_flags & XFS_DIFLAG_REALTIME)
+ vap->va_xflags |= XFS_XFLAG_REALTIME;
+ if (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC)
+ vap->va_xflags |= XFS_XFLAG_PREALLOC;
+ if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
+ vap->va_xflags |= XFS_XFLAG_IMMUTABLE;
+ if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
+ vap->va_xflags |= XFS_XFLAG_APPEND;
+ if (ip->i_d.di_flags & XFS_DIFLAG_SYNC)
+ vap->va_xflags |= XFS_XFLAG_SYNC;
+ if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME)
+ vap->va_xflags |= XFS_XFLAG_NOATIME;
+ if (ip->i_d.di_flags & XFS_DIFLAG_NODUMP)
+ vap->va_xflags |= XFS_XFLAG_NODUMP;
+ if (XFS_IFORK_Q(ip))
+ vap->va_xflags |= XFS_XFLAG_HASATTR;
+ /*
+ * Exit for inode revalidate. See if any of the rest of
+ * the fields to be filled in are needed.
+ */
+ if ((vap->va_mask &
+ (XFS_AT_EXTSIZE|XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS|
+ XFS_AT_GENCOUNT|XFS_AT_VCODE)) == 0)
+ goto all_done;
+
+ vap->va_extsize = ip->i_d.di_extsize << mp->m_sb.sb_blocklog;
+ vap->va_nextents =
+ (ip->i_df.if_flags & XFS_IFEXTENTS) ?
+ ip->i_df.if_bytes / sizeof(xfs_bmbt_rec_t) :
+ ip->i_d.di_nextents;
+ if (ip->i_afp)
+ vap->va_anextents =
+ (ip->i_afp->if_flags & XFS_IFEXTENTS) ?
+ ip->i_afp->if_bytes / sizeof(xfs_bmbt_rec_t) :
+ ip->i_d.di_anextents;
+ else
+ vap->va_anextents = 0;
+ vap->va_gen = ip->i_d.di_gen;
+
+ all_done:
+ if (!(flags & ATTR_LAZY))
+ xfs_iunlock(ip, XFS_ILOCK_SHARED);
+ return 0;
+}
+
+
+/*
+ * xfs_setattr
+ */
+STATIC int
+xfs_setattr(
+ bhv_desc_t *bdp,
+ vattr_t *vap,
+ int flags,
+ cred_t *credp)
+{
+ xfs_inode_t *ip;
+ xfs_trans_t *tp;
+ xfs_mount_t *mp;
+ int mask;
+ int code;
+ uint lock_flags;
+ uint commit_flags=0;
+ uid_t uid=0, iuid=0;
+ gid_t gid=0, igid=0;
+ int timeflags = 0;
+ vnode_t *vp;
+ xfs_prid_t projid=0, iprojid=0;
+ int mandlock_before, mandlock_after;
+ struct xfs_dquot *udqp, *gdqp, *olddquot1, *olddquot2;
+ int file_owner;
+
+ vp = BHV_TO_VNODE(bdp);
+ vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
+
+ if (vp->v_vfsp->vfs_flag & VFS_RDONLY)
+ return XFS_ERROR(EROFS);
+
+ /*
+ * Cannot set certain attributes.
+ */
+ mask = vap->va_mask;
+ if (mask & XFS_AT_NOSET) {
+ return XFS_ERROR(EINVAL);
+ }
+
+ ip = XFS_BHVTOI(bdp);
+ mp = ip->i_mount;
+
+ if (XFS_FORCED_SHUTDOWN(mp))
+ return XFS_ERROR(EIO);
+
+ /*
+ * Timestamps do not need to be logged and hence do not
+ * need to be done within a transaction.
+ */
+ if (mask & XFS_AT_UPDTIMES) {
+ ASSERT((mask & ~XFS_AT_UPDTIMES) == 0);
+ timeflags = ((mask & XFS_AT_UPDATIME) ? XFS_ICHGTIME_ACC : 0) |
+ ((mask & XFS_AT_UPDCTIME) ? XFS_ICHGTIME_CHG : 0) |
+ ((mask & XFS_AT_UPDMTIME) ? XFS_ICHGTIME_MOD : 0);
+ xfs_ichgtime(ip, timeflags);
+ return 0;
+ }
+
+ olddquot1 = olddquot2 = NULL;
+ udqp = gdqp = NULL;
+
+ /*
+ * If disk quotas is on, we make sure that the dquots do exist on disk,
+ * before we start any other transactions. Trying to do this later
+ * is messy. We don't care to take a readlock to look at the ids
+ * in inode here, because we can't hold it across the trans_reserve.
+ * If the IDs do change before we take the ilock, we're covered
+ * because the i_*dquot fields will get updated anyway.
+ */
+ if (XFS_IS_QUOTA_ON(mp) && (mask & (XFS_AT_UID|XFS_AT_GID))) {
+ uint qflags = 0;
+
+ if (mask & XFS_AT_UID) {
+ uid = vap->va_uid;
+ qflags |= XFS_QMOPT_UQUOTA;
+ } else {
+ uid = ip->i_d.di_uid;
+ }
+ if (mask & XFS_AT_GID) {
+ gid = vap->va_gid;
+ qflags |= XFS_QMOPT_GQUOTA;
+ } else {
+ gid = ip->i_d.di_gid;
+ }
+ /*
+ * We take a reference when we initialize udqp and gdqp,
+ * so it is important that we never blindly double trip on
+ * the same variable. See xfs_create() for an example.
+ */
+ ASSERT(udqp == NULL);
+ ASSERT(gdqp == NULL);
+ code = XFS_QM_DQVOPALLOC(mp, ip, uid,gid, qflags, &udqp, &gdqp);
+ if (code)
+ return (code);
+ }
+
+ /*
+ * For the other attributes, we acquire the inode lock and
+ * first do an error checking pass.
+ */
+ tp = NULL;
+ lock_flags = XFS_ILOCK_EXCL;
+ if (!(mask & XFS_AT_SIZE)) {
+ if ((mask != (XFS_AT_CTIME|XFS_AT_ATIME|XFS_AT_MTIME)) ||
+ (mp->m_flags & XFS_MOUNT_WSYNC)) {
+ tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
+ commit_flags = 0;
+ if ((code = xfs_trans_reserve(tp, 0,
+ XFS_ICHANGE_LOG_RES(mp), 0,
+ 0, 0))) {
+ lock_flags = 0;
+ goto error_return;
+ }
+ }
+ } else {
+ if (DM_EVENT_ENABLED (vp->v_vfsp, ip, DM_EVENT_TRUNCATE) &&
+ !(flags & ATTR_DMI)) {
+ code = XFS_SEND_DATA(mp, DM_EVENT_TRUNCATE, vp,
+ vap->va_size, 0, AT_DELAY_FLAG(flags), NULL);
+ if (code) {
+ lock_flags = 0;
+ goto error_return;
+ }
+ }
+ lock_flags |= XFS_IOLOCK_EXCL;
+ }
+
+ xfs_ilock(ip, lock_flags);
+
+ if (_MAC_XFS_IACCESS(ip, MACWRITE, credp)) {
+ code = XFS_ERROR(EACCES);
+ goto error_return;
+ }
+
+ /* boolean: are we the file owner? */
+ file_owner = (current_fsuid(credp) == ip->i_d.di_uid);
+
+ /*
+ * Change various properties of a file.
+ * Only the owner or users with CAP_FOWNER
+ * capability may do these things.
+ */
+ if (mask &
+ (XFS_AT_MODE|XFS_AT_XFLAGS|XFS_AT_EXTSIZE|XFS_AT_UID|
+ XFS_AT_GID|XFS_AT_PROJID)) {
+ /*
+ * CAP_FOWNER overrides the following restrictions:
+ *
+ * The user ID of the calling process must be equal
+ * to the file owner ID, except in cases where the
+ * CAP_FSETID capability is applicable.
+ */
+ if (!file_owner && !capable(CAP_FOWNER)) {
+ code = XFS_ERROR(EPERM);
+ goto error_return;
+ }
+
+ /*
+ * CAP_FSETID overrides the following restrictions:
+ *
+ * The effective user ID of the calling process shall match
+ * the file owner when setting the set-user-ID and
+ * set-group-ID bits on that file.
+ *
+ * The effective group ID or one of the supplementary group
+ * IDs of the calling process shall match the group owner of
+ * the file when setting the set-group-ID bit on that file
+ */
+ if (mask & XFS_AT_MODE) {
+ mode_t m = 0;
+
+ if ((vap->va_mode & S_ISUID) && !file_owner)
+ m |= S_ISUID;
+ if ((vap->va_mode & S_ISGID) &&
+ !in_group_p((gid_t)ip->i_d.di_gid))
+ m |= S_ISGID;
+#if 0
+ /* Linux allows this, Irix doesn't. */
+ if ((vap->va_mode & S_ISVTX) && vp->v_type != VDIR)
+ m |= S_ISVTX;
+#endif
+ if (m && !capable(CAP_FSETID))
+ vap->va_mode &= ~m;
+ }
+ }
+
+ /*
+ * Change file ownership. Must be the owner or privileged.
+ * If the system was configured with the "restricted_chown"
+ * option, the owner is not permitted to give away the file,
+ * and can change the group id only to a group of which he
+ * or she is a member.
+ */
+ if (mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_PROJID)) {
+ /*
+ * These IDs could have changed since we last looked at them.
+ * But, we're assured that if the ownership did change
+ * while we didn't have the inode locked, inode's dquot(s)
+ * would have changed also.
+ */
+ iuid = ip->i_d.di_uid;
+ iprojid = ip->i_d.di_projid;
+ igid = ip->i_d.di_gid;
+ gid = (mask & XFS_AT_GID) ? vap->va_gid : igid;
+ uid = (mask & XFS_AT_UID) ? vap->va_uid : iuid;
+ projid = (mask & XFS_AT_PROJID) ? (xfs_prid_t)vap->va_projid :
+ iprojid;
+
+ /*
+ * CAP_CHOWN overrides the following restrictions:
+ *
+ * If _POSIX_CHOWN_RESTRICTED is defined, this capability
+ * shall override the restriction that a process cannot
+ * change the user ID of a file it owns and the restriction
+ * that the group ID supplied to the chown() function
+ * shall be equal to either the group ID or one of the
+ * supplementary group IDs of the calling process.
+ *
+ * XXX: How does restricted_chown affect projid?
+ */
+ if (restricted_chown &&
+ (iuid != uid || (igid != gid &&
+ !in_group_p((gid_t)gid))) &&
+ !capable(CAP_CHOWN)) {
+ code = XFS_ERROR(EPERM);
+ goto error_return;
+ }
+ /*
+ * Do a quota reservation only if uid or gid is actually
+ * going to change.
+ */
+ if ((XFS_IS_UQUOTA_ON(mp) && iuid != uid) ||
+ (XFS_IS_GQUOTA_ON(mp) && igid != gid)) {
+ ASSERT(tp);
+ code = XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, udqp, gdqp,
+ capable(CAP_FOWNER) ?
+ XFS_QMOPT_FORCE_RES : 0);
+ if (code) /* out of quota */
+ goto error_return;
+ }
+ }
+
+ /*
+ * Truncate file. Must have write permission and not be a directory.
+ */
+ if (mask & XFS_AT_SIZE) {
+ /* Short circuit the truncate case for zero length files */
+ if ((vap->va_size == 0) &&
+ (ip->i_d.di_size == 0) && (ip->i_d.di_nextents == 0)) {
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
+ lock_flags &= ~XFS_ILOCK_EXCL;
+ if (mask & XFS_AT_CTIME)
+ xfs_ichgtime(ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
+ code = 0;
+ goto error_return;
+ }
+
+ if (vp->v_type == VDIR) {
+ code = XFS_ERROR(EISDIR);
+ goto error_return;
+ } else if (vp->v_type != VREG) {
+ code = XFS_ERROR(EINVAL);
+ goto error_return;
+ }
+ /*
+ * Make sure that the dquots are attached to the inode.
+ */
+ if ((code = XFS_QM_DQATTACH(mp, ip, XFS_QMOPT_ILOCKED)))
+ goto error_return;
+ }
+
+ /*
+ * Change file access or modified times.
+ */
+ if (mask & (XFS_AT_ATIME|XFS_AT_MTIME)) {
+ if (!file_owner) {
+ if ((flags & ATTR_UTIME) &&
+ !capable(CAP_FOWNER)) {
+ code = XFS_ERROR(EPERM);
+ goto error_return;
+ }
+ }
+ }
+
+ /*
+ * Change extent size or realtime flag.
+ */
+ if (mask & (XFS_AT_EXTSIZE|XFS_AT_XFLAGS)) {
+ /*
+ * Can't change extent size if any extents are allocated.
+ */
+ if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
+ (mask & XFS_AT_EXTSIZE) &&
+ ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
+ vap->va_extsize) ) {
+ code = XFS_ERROR(EINVAL); /* EFBIG? */
+ goto error_return;
+ }
+
+ /*
+ * Can't set extent size unless the file is marked, or
+ * about to be marked as a realtime file.
+ *
+ * This check will be removed when fixed size extents
+ * with buffered data writes is implemented.
+ *
+ */
+ if ((mask & XFS_AT_EXTSIZE) &&
+ ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
+ vap->va_extsize) &&
+ (!((ip->i_d.di_flags & XFS_DIFLAG_REALTIME) ||
+ ((mask & XFS_AT_XFLAGS) &&
+ (vap->va_xflags & XFS_XFLAG_REALTIME))))) {
+ code = XFS_ERROR(EINVAL);
+ goto error_return;
+ }
+
+ /*
+ * Can't change realtime flag if any extents are allocated.
+ */
+ if (ip->i_d.di_nextents && (mask & XFS_AT_XFLAGS) &&
+ (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) !=
+ (vap->va_xflags & XFS_XFLAG_REALTIME)) {
+ code = XFS_ERROR(EINVAL); /* EFBIG? */
+ goto error_return;
+ }
+ /*
+ * Extent size must be a multiple of the appropriate block
+ * size, if set at all.
+ */
+ if ((mask & XFS_AT_EXTSIZE) && vap->va_extsize != 0) {
+ xfs_extlen_t size;
+
+ if ((ip->i_d.di_flags & XFS_DIFLAG_REALTIME) ||
+ ((mask & XFS_AT_XFLAGS) &&
+ (vap->va_xflags & XFS_XFLAG_REALTIME))) {
+ size = mp->m_sb.sb_rextsize <<
+ mp->m_sb.sb_blocklog;
+ } else {
+ size = mp->m_sb.sb_blocksize;
+ }
+ if (vap->va_extsize % size) {
+ code = XFS_ERROR(EINVAL);
+ goto error_return;
+ }
+ }
+ /*
+ * If realtime flag is set then must have realtime data.
+ */
+ if ((mask & XFS_AT_XFLAGS) &&
+ (vap->va_xflags & XFS_XFLAG_REALTIME)) {
+ if ((mp->m_sb.sb_rblocks == 0) ||
+ (mp->m_sb.sb_rextsize == 0) ||
+ (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
+ code = XFS_ERROR(EINVAL);
+ goto error_return;
+ }
+ }
+
+ /*
+ * Can't modify an immutable/append-only file unless
+ * we have appropriate permission.
+ */
+ if ((mask & XFS_AT_XFLAGS) &&
+ (ip->i_d.di_flags &
+ (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
+ (vap->va_xflags &
+ (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
+ !capable(CAP_LINUX_IMMUTABLE)) {
+ code = XFS_ERROR(EPERM);
+ goto error_return;
+ }
+ }
+
+ /*
+ * Now we can make the changes. Before we join the inode
+ * to the transaction, if XFS_AT_SIZE is set then take care of
+ * the part of the truncation that must be done without the
+ * inode lock. This needs to be done before joining the inode
+ * to the transaction, because the inode cannot be unlocked
+ * once it is a part of the transaction.
+ */
+ if (mask & XFS_AT_SIZE) {
+ if (vap->va_size > ip->i_d.di_size) {
+ code = xfs_igrow_start(ip, vap->va_size, credp);
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
+ } else if (vap->va_size <= ip->i_d.di_size) {
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
+ xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE,
+ (xfs_fsize_t)vap->va_size);
+ code = 0;
+ } else {
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
+ code = 0;
+ }
+ if (code) {
+ ASSERT(tp == NULL);
+ lock_flags &= ~XFS_ILOCK_EXCL;
+ ASSERT(lock_flags == XFS_IOLOCK_EXCL);
+ goto error_return;
+ }
+ tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE);
+ if ((code = xfs_trans_reserve(tp, 0,
+ XFS_ITRUNCATE_LOG_RES(mp), 0,
+ XFS_TRANS_PERM_LOG_RES,
+ XFS_ITRUNCATE_LOG_COUNT))) {
+ xfs_trans_cancel(tp, 0);
+ xfs_iunlock(ip, XFS_IOLOCK_EXCL);
+ return code;
+ }
+ commit_flags = XFS_TRANS_RELEASE_LOG_RES;
+ xfs_ilock(ip, XFS_ILOCK_EXCL);
+ }
+
+ if (tp) {
+ xfs_trans_ijoin(tp, ip, lock_flags);
+ xfs_trans_ihold(tp, ip);
+ }
+
+ /* determine whether mandatory locking mode changes */
+ mandlock_before = MANDLOCK(vp, ip->i_d.di_mode);
+
+ /*
+ * Truncate file. Must have write permission and not be a directory.
+ */
+ if (mask & XFS_AT_SIZE) {
+ if (vap->va_size > ip->i_d.di_size) {
+ xfs_igrow_finish(tp, ip, vap->va_size,
+ !(flags & ATTR_DMI));
+ } else if ((vap->va_size <= ip->i_d.di_size) ||
+ ((vap->va_size == 0) && ip->i_d.di_nextents)) {
+ /*
+ * signal a sync transaction unless
+ * we're truncating an already unlinked
+ * file on a wsync filesystem
+ */
+ code = xfs_itruncate_finish(&tp, ip,
+ (xfs_fsize_t)vap->va_size,
+ XFS_DATA_FORK,
+ ((ip->i_d.di_nlink != 0 ||
+ !(mp->m_flags & XFS_MOUNT_WSYNC))
+ ? 1 : 0));
+ if (code) {
+ goto abort_return;
+ }
+ }
+ /*
+ * Have to do this even if the file's size doesn't change.
+ */
+ timeflags |= XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG;
+ }
+
+ /*
+ * Change file access modes.
+ */
+ if (mask & XFS_AT_MODE) {
+ ip->i_d.di_mode &= S_IFMT;
+ ip->i_d.di_mode |= vap->va_mode & ~S_IFMT;
+
+ xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE);
+ timeflags |= XFS_ICHGTIME_CHG;
+ }
+
+ /*
+ * Change file ownership. Must be the owner or privileged.
+ * If the system was configured with the "restricted_chown"
+ * option, the owner is not permitted to give away the file,
+ * and can change the group id only to a group of which he
+ * or she is a member.
+ */
+ if (mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_PROJID)) {
+ /*
+ * CAP_FSETID overrides the following restrictions:
+ *
+ * The set-user-ID and set-group-ID bits of a file will be
+ * cleared upon successful return from chown()
+ */
+ if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
+ !capable(CAP_FSETID)) {
+ ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
+ }
+
+ /*
+ * Change the ownerships and register quota modifications
+ * in the transaction.
+ */
+ if (iuid != uid) {
+ if (XFS_IS_UQUOTA_ON(mp)) {
+ ASSERT(mask & XFS_AT_UID);
+ ASSERT(udqp);
+ olddquot1 = XFS_QM_DQVOPCHOWN(mp, tp, ip,
+ &ip->i_udquot, udqp);
+ }
+ ip->i_d.di_uid = uid;
+ }
+ if (igid != gid) {
+ if (XFS_IS_GQUOTA_ON(mp)) {
+ ASSERT(mask & XFS_AT_GID);
+ ASSERT(gdqp);
+ olddquot2 = XFS_QM_DQVOPCHOWN(mp, tp, ip,
+ &ip->i_gdquot, gdqp);
+ }
+ ip->i_d.di_gid = gid;
+ }
+ if (iprojid != projid) {
+ ip->i_d.di_projid = projid;
+ /*
+ * We may have to rev the inode as well as
+ * the superblock version number since projids didn't
+ * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
+ */
+ if (ip->i_d.di_version == XFS_DINODE_VERSION_1)
+ xfs_bump_ino_vers2(tp, ip);
+ }
+
+ xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE);
+ timeflags |= XFS_ICHGTIME_CHG;
+ }
+
+
+ /*
+ * Change file access or modified times.
+ */
+ if (mask & (XFS_AT_ATIME|XFS_AT_MTIME)) {
+ if (mask & XFS_AT_ATIME) {
+ ip->i_d.di_atime.t_sec = vap->va_atime.tv_sec;
+ ip->i_d.di_atime.t_nsec = vap->va_atime.tv_nsec;
+ ip->i_update_core = 1;
+ timeflags &= ~XFS_ICHGTIME_ACC;
+ }
+ if (mask & XFS_AT_MTIME) {
+ ip->i_d.di_mtime.t_sec = vap->va_mtime.tv_sec;
+ ip->i_d.di_mtime.t_nsec = vap->va_mtime.tv_nsec;
+ timeflags &= ~XFS_ICHGTIME_MOD;
+ timeflags |= XFS_ICHGTIME_CHG;
+ }
+ if (tp && (flags & ATTR_UTIME))
+ xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE);
+ }
+
+ /*
+ * Change XFS-added attributes.
+ */
+ if (mask & (XFS_AT_EXTSIZE|XFS_AT_XFLAGS)) {
+ if (mask & XFS_AT_EXTSIZE) {
+ /*
+ * Converting bytes to fs blocks.
+ */
+ ip->i_d.di_extsize = vap->va_extsize >>
+ mp->m_sb.sb_blocklog;
+ }
+ if (mask & XFS_AT_XFLAGS) {
+ ip->i_d.di_flags = 0;
+ if (vap->va_xflags & XFS_XFLAG_REALTIME) {
+ ip->i_d.di_flags |= XFS_DIFLAG_REALTIME;
+ ip->i_iocore.io_flags |= XFS_IOCORE_RT;
+ }
+ if (vap->va_xflags & XFS_XFLAG_IMMUTABLE)
+ ip->i_d.di_flags |= XFS_DIFLAG_IMMUTABLE;
+ if (vap->va_xflags & XFS_XFLAG_APPEND)
+ ip->i_d.di_flags |= XFS_DIFLAG_APPEND;
+ if (vap->va_xflags & XFS_XFLAG_SYNC)
+ ip->i_d.di_flags |= XFS_DIFLAG_SYNC;
+ if (vap->va_xflags & XFS_XFLAG_NOATIME)
+ ip->i_d.di_flags |= XFS_DIFLAG_NOATIME;
+ if (vap->va_xflags & XFS_XFLAG_NODUMP)
+ ip->i_d.di_flags |= XFS_DIFLAG_NODUMP;
+ /* can't set PREALLOC this way, just ignore it */
+ }
+ xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
+ timeflags |= XFS_ICHGTIME_CHG;
+ }
+
+ /*
+ * Change file inode change time only if XFS_AT_CTIME set
+ * AND we have been called by a DMI function.
+ */
+
+ if ( (flags & ATTR_DMI) && (mask & XFS_AT_CTIME) ) {
+ ip->i_d.di_ctime.t_sec = vap->va_ctime.tv_sec;
+ ip->i_d.di_ctime.t_nsec = vap->va_ctime.tv_nsec;
+ ip->i_update_core = 1;
+ timeflags &= ~XFS_ICHGTIME_CHG;
+ }
+
+ /*
+ * Send out timestamp changes that need to be set to the
+ * current time. Not done when called by a DMI function.
+ */
+ if (timeflags && !(flags & ATTR_DMI))
+ xfs_ichgtime(ip, timeflags);
+
+ XFS_STATS_INC(xs_ig_attrchg);
+
+ /*
+ * If this is a synchronous mount, make sure that the
+ * transaction goes to disk before returning to the user.
+ * This is slightly sub-optimal in that truncates require
+ * two sync transactions instead of one for wsync filesytems.
+ * One for the truncate and one for the timestamps since we
+ * don't want to change the timestamps unless we're sure the
+ * truncate worked. Truncates are less than 1% of the laddis
+ * mix so this probably isn't worth the trouble to optimize.
+ */
+ code = 0;
+ if (tp) {
+ if (mp->m_flags & XFS_MOUNT_WSYNC)
+ xfs_trans_set_sync(tp);
+
+ code = xfs_trans_commit(tp, commit_flags, NULL);
+ }
+
+ /*
+ * If the (regular) file's mandatory locking mode changed, then
+ * notify the vnode. We do this under the inode lock to prevent
+ * racing calls to vop_vnode_change.
+ */
+ mandlock_after = MANDLOCK(vp, ip->i_d.di_mode);
+ if (mandlock_before != mandlock_after) {
+ VOP_VNODE_CHANGE(vp, VCHANGE_FLAGS_ENF_LOCKING,
+ mandlock_after);
+ }
+
+ xfs_iunlock(ip, lock_flags);
+
+ /*
+ * Release any dquot(s) the inode had kept before chown.
+ */
+ XFS_QM_DQRELE(mp, olddquot1);
+ XFS_QM_DQRELE(mp, olddquot2);
+ XFS_QM_DQRELE(mp, udqp);
+ XFS_QM_DQRELE(mp, gdqp);
+
+ if (code) {
+ return code;
+ }
+
+ if (DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_ATTRIBUTE) &&
+ !(flags & ATTR_DMI)) {
+ (void) XFS_SEND_NAMESP(mp, DM_EVENT_ATTRIBUTE, vp, DM_RIGHT_NULL,
+ NULL, DM_RIGHT_NULL, NULL, NULL,
+ 0, 0, AT_DELAY_FLAG(flags));
+ }
+ return 0;
+
+ abort_return:
+ commit_flags |= XFS_TRANS_ABORT;
+ /* FALLTHROUGH */
+ error_return:
+ XFS_QM_DQRELE(mp, udqp);
+ XFS_QM_DQRELE(mp, gdqp);
+ if (tp) {
+ xfs_trans_cancel(tp, commit_flags);
+ }
+ if (lock_flags != 0) {
+ xfs_iunlock(ip, lock_flags);
+ }
+ return code;
+}
+
+
+/*
+ * xfs_access
+ * Null conversion from vnode mode bits to inode mode bits, as in efs.
+ */
+STATIC int
+xfs_access(
+ bhv_desc_t *bdp,
+ int mode,
+ cred_t *credp)
+{
+ xfs_inode_t *ip;
+ int error;
+
+ vn_trace_entry(BHV_TO_VNODE(bdp), __FUNCTION__,
+ (inst_t *)__return_address);
+
+ ip = XFS_BHVTOI(bdp);
+ xfs_ilock(ip, XFS_ILOCK_SHARED);
+ error = xfs_iaccess(ip, mode, credp);
+ xfs_iunlock(ip, XFS_ILOCK_SHARED);
+ return error;
+}
+
+
+/*
+ * xfs_readlink
+ *
+ */
+STATIC int
+xfs_readlink(
+ bhv_desc_t *bdp,
+ uio_t *uiop,
+ int ioflags,
+ cred_t *credp)
+{
+ xfs_inode_t *ip;
+ int count;
+ xfs_off_t offset;
+ int pathlen;
+ vnode_t *vp;
+ int error = 0;
+ xfs_mount_t *mp;
+ int nmaps;
+ xfs_bmbt_irec_t mval[SYMLINK_MAPS];
+ xfs_daddr_t d;
+ int byte_cnt;
+ int n;
+ xfs_buf_t *bp;
+
+ vp = BHV_TO_VNODE(bdp);
+ vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
+
+ ip = XFS_BHVTOI(bdp);
+ mp = ip->i_mount;
+
+ if (XFS_FORCED_SHUTDOWN(mp))
+ return XFS_ERROR(EIO);
+
+ xfs_ilock(ip, XFS_ILOCK_SHARED);
+
+ ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFLNK);
+
+ offset = uiop->uio_offset;
+ count = uiop->uio_resid;
+
+ if (offset < 0) {
+ error = XFS_ERROR(EINVAL);
+ goto error_return;
+ }
+ if (count <= 0) {
+ error = 0;
+ goto error_return;
+ }
+
+ if (!(ioflags & IO_INVIS)) {
+ xfs_ichgtime(ip, XFS_ICHGTIME_ACC);
+ }
+
+ /*
+ * See if the symlink is stored inline.
+ */
+ pathlen = (int)ip->i_d.di_size;
+
+ if (ip->i_df.if_flags & XFS_IFINLINE) {
+ error = uio_read(ip->i_df.if_u1.if_data, pathlen, uiop);
+ }
+ else {
+ /*
+ * Symlink not inline. Call bmap to get it in.
+ */
+ nmaps = SYMLINK_MAPS;
+
+ error = xfs_bmapi(NULL, ip, 0, XFS_B_TO_FSB(mp, pathlen),
+ 0, NULL, 0, mval, &nmaps, NULL);
+
+ if (error) {
+ goto error_return;
+ }
+
+ for (n = 0; n < nmaps; n++) {
+ d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock);
+ byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount);
+ bp = xfs_buf_read(mp->m_ddev_targp, d,
+ BTOBB(byte_cnt), 0);
+ error = XFS_BUF_GETERROR(bp);
+ if (error) {
+ xfs_ioerror_alert("xfs_readlink",
+ ip->i_mount, bp, XFS_BUF_ADDR(bp));
+ xfs_buf_relse(bp);
+ goto error_return;
+ }
+ if (pathlen < byte_cnt)
+ byte_cnt = pathlen;
+ pathlen -= byte_cnt;
+
+ error = uio_read(XFS_BUF_PTR(bp), byte_cnt, uiop);
+ xfs_buf_relse (bp);
+ }
+
+ }
+
+
+error_return:
+
+ xfs_iunlock(ip, XFS_ILOCK_SHARED);
+
+ return error;
+}
+
+
+/*
+ * xfs_fsync
+ *
+ * This is called to sync the inode and its data out to disk.
+ * We need to hold the I/O lock while flushing the data, and
+ * the inode lock while flushing the inode. The inode lock CANNOT
+ * be held while flushing the data, so acquire after we're done
+ * with that.
+ */
+STATIC int
+xfs_fsync(
+ bhv_desc_t *bdp,
+ int flag,
+ cred_t *credp,
+ xfs_off_t start,
+ xfs_off_t stop)
+{
+ xfs_inode_t *ip;
+ int error;
+ int error2;
+ int syncall;
+ vnode_t *vp;
+ xfs_trans_t *tp;
+
+ vp = BHV_TO_VNODE(bdp);
+ vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
+
+ ip = XFS_BHVTOI(bdp);
+
+ ASSERT(start >= 0 && stop >= -1);
+
+ if (XFS_FORCED_SHUTDOWN(ip->i_mount))
+ return XFS_ERROR(EIO);
+
+ xfs_ilock(ip, XFS_IOLOCK_EXCL);
+
+ syncall = error = error2 = 0;
+
+ if (stop == -1) {
+ ASSERT(start >= 0);
+ if (start == 0)
+ syncall = 1;
+ stop = xfs_file_last_byte(ip);
+ }
+
+ /*
+ * If we're invalidating, always flush since we want to
+ * tear things down. Otherwise, don't flush anything if
+ * we're not dirty.
+ */
+ if (flag & FSYNC_INVAL) {
+ if (ip->i_df.if_flags & XFS_IFEXTENTS &&
+ ip->i_df.if_bytes > 0) {
+ VOP_FLUSHINVAL_PAGES(vp, start, -1, FI_REMAPF_LOCKED);
+ }
+ ASSERT(syncall == 0 || (VN_CACHED(vp) == 0));
+ } else {
+ /*
+ * In the non-invalidating case, calls to fsync() do not
+ * flush all the dirty mmap'd pages. That requires a
+ * call to msync().
+ */
+ VOP_FLUSH_PAGES(vp, start, -1,
+ (flag & FSYNC_WAIT) ? 0 : XFS_B_ASYNC,
+ FI_NONE, error2);
+ }
+
+ if (error2) {
+ xfs_iunlock(ip, XFS_IOLOCK_EXCL);
+ return XFS_ERROR(error2);
+ }
+
+ /*
+ * We always need to make sure that the required inode state
+ * is safe on disk. The vnode might be clean but because
+ * of committed transactions that haven't hit the disk yet.
+ * Likewise, there could be unflushed non-transactional
+ * changes to the inode core that have to go to disk.
+ *
+ * The following code depends on one assumption: that
+ * any transaction that changes an inode logs the core
+ * because it has to change some field in the inode core
+ * (typically nextents or nblocks). That assumption
+ * implies that any transactions against an inode will
+ * catch any non-transactional updates. If inode-altering
+ * transactions exist that violate this assumption, the
+ * code breaks. Right now, it figures that if the involved
+ * update_* field is clear and the inode is unpinned, the
+ * inode is clean. Either it's been flushed or it's been
+ * committed and the commit has hit the disk unpinning the inode.
+ * (Note that xfs_inode_item_format() called at commit clears
+ * the update_* fields.)
+ */
+ xfs_ilock(ip, XFS_ILOCK_SHARED);
+
+ /* If we are flushing data then we care about update_size
+ * being set, otherwise we care about update_core
+ */
+ if ((flag & FSYNC_DATA) ?
+ (ip->i_update_size == 0) :
+ (ip->i_update_core == 0)) {
+ /*
+ * Timestamps/size haven't changed since last inode
+ * flush or inode transaction commit. That means
+ * either nothing got written or a transaction
+ * committed which caught the updates. If the
+ * latter happened and the transaction hasn't
+ * hit the disk yet, the inode will be still
+ * be pinned. If it is, force the log.
+ */
+
+ xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_SHARED);
+
+ if (xfs_ipincount(ip)) {
+ xfs_log_force(ip->i_mount, (xfs_lsn_t)0,
+ XFS_LOG_FORCE |
+ ((flag & FSYNC_WAIT)
+ ? XFS_LOG_SYNC : 0));
+ }
+ error = 0;
+ } else {
+ /*
+ * Kick off a transaction to log the inode
+ * core to get the updates. Make it
+ * sync if FSYNC_WAIT is passed in (which
+ * is done by everybody but specfs). The
+ * sync transaction will also force the log.
+ */
+ xfs_iunlock(ip, XFS_ILOCK_SHARED);
+ tp = xfs_trans_alloc(ip->i_mount, XFS_TRANS_FSYNC_TS);
+ if ((error = xfs_trans_reserve(tp, 0,
+ XFS_FSYNC_TS_LOG_RES(ip->i_mount),
+ 0, 0, 0))) {
+ xfs_trans_cancel(tp, 0);
+ xfs_iunlock(ip, XFS_IOLOCK_EXCL);
+ return error;
+ }
+ xfs_ilock(ip, XFS_ILOCK_EXCL);
+
+ /*
+ * Note - it's possible that we might have pushed
+ * ourselves out of the way during trans_reserve
+ * which would flush the inode. But there's no
+ * guarantee that the inode buffer has actually
+ * gone out yet (it's delwri). Plus the buffer
+ * could be pinned anyway if it's part of an
+ * inode in another recent transaction. So we
+ * play it safe and fire off the transaction anyway.
+ */
+ xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL);
+ xfs_trans_ihold(tp, ip);
+ xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
+ if (flag & FSYNC_WAIT)
+ xfs_trans_set_sync(tp);
+ error = xfs_trans_commit(tp, 0, NULL);
+
+ xfs_iunlock(ip, XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL);
+ }
+ return error;
+}
+
+
+#if 0
+/*
+ * This is a utility routine for xfs_inactive. It is called when a
+ * transaction attempting to free up the disk space for a file encounters
+ * an error. It cancels the old transaction and starts up a new one
+ * to be used to free up the inode. It also sets the inode size and extent
+ * counts to 0 and frees up any memory being used to store inline data,
+ * extents, or btree roots.
+ */
+STATIC void
+xfs_itruncate_cleanup(
+ xfs_trans_t **tpp,
+ xfs_inode_t *ip,
+ int commit_flags,
+ int fork)
+{
+ xfs_mount_t *mp;
+ /* REFERENCED */
+ int error;
+
+ mp = ip->i_mount;
+ if (*tpp) {
+ xfs_trans_cancel(*tpp, commit_flags | XFS_TRANS_ABORT);
+ }
+ xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
+ *tpp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE);
+ error = xfs_trans_reserve(*tpp, 0, XFS_IFREE_LOG_RES(mp), 0, 0,
+ XFS_DEFAULT_LOG_COUNT);
+ if (error) {
+ return;
+ }
+
+ xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
+ xfs_trans_ijoin(*tpp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
+ xfs_trans_ihold(*tpp, ip);
+
+ xfs_idestroy_fork(ip, fork);
+
+ if (fork == XFS_DATA_FORK) {
+ ip->i_d.di_nblocks = 0;
+ ip->i_d.di_nextents = 0;
+ ip->i_d.di_size = 0;
+ } else {
+ ip->i_d.di_anextents = 0;
+ }
+ xfs_trans_log_inode(*tpp, ip, XFS_ILOG_CORE);
+}
+#endif
+
+/*
+ * This is called by xfs_inactive to free any blocks beyond eof,
+ * when the link count isn't zero.
+ */
+STATIC int
+xfs_inactive_free_eofblocks(
+ xfs_mount_t *mp,
+ xfs_inode_t *ip)
+{
+ xfs_trans_t *tp;
+ int error;
+ xfs_fileoff_t end_fsb;
+ xfs_fileoff_t last_fsb;
+ xfs_filblks_t map_len;
+ int nimaps;
+ xfs_bmbt_irec_t imap;
+
+ /*
+ * Figure out if there are any blocks beyond the end
+ * of the file. If not, then there is nothing to do.
+ */
+ end_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)ip->i_d.di_size));
+ last_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp));
+ map_len = last_fsb - end_fsb;
+ if (map_len <= 0)
+ return (0);
+
+ nimaps = 1;
+ xfs_ilock(ip, XFS_ILOCK_SHARED);
+ error = xfs_bmapi(NULL, ip, end_fsb, map_len, 0,
+ NULL, 0, &imap, &nimaps, NULL);
+ xfs_iunlock(ip, XFS_ILOCK_SHARED);
+
+ if (!error && (nimaps != 0) &&
+ (imap.br_startblock != HOLESTARTBLOCK)) {
+ /*
+ * Attach the dquots to the inode up front.
+ */
+ if ((error = XFS_QM_DQATTACH(mp, ip, 0)))
+ return (error);
+
+ /*
+ * There are blocks after the end of file.
+ * Free them up now by truncating the file to
+ * its current size.
+ */
+ tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE);
+
+ /*
+ * Do the xfs_itruncate_start() call before
+ * reserving any log space because
+ * itruncate_start will call into the buffer
+ * cache and we can't
+ * do that within a transaction.
+ */
+ xfs_ilock(ip, XFS_IOLOCK_EXCL);
+ xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE,
+ ip->i_d.di_size);
+
+ error = xfs_trans_reserve(tp, 0,
+ XFS_ITRUNCATE_LOG_RES(mp),
+ 0, XFS_TRANS_PERM_LOG_RES,
+ XFS_ITRUNCATE_LOG_COUNT);
+ if (error) {
+ ASSERT(XFS_FORCED_SHUTDOWN(mp));
+ xfs_trans_cancel(tp, 0);
+ xfs_iunlock(ip, XFS_IOLOCK_EXCL);
+ return (error);
+ }
+
+ xfs_ilock(ip, XFS_ILOCK_EXCL);
+ xfs_trans_ijoin(tp, ip,
+ XFS_IOLOCK_EXCL |
+ XFS_ILOCK_EXCL);
+ xfs_trans_ihold(tp, ip);
+
+ error = xfs_itruncate_finish(&tp, ip,
+ ip->i_d.di_size,
+ XFS_DATA_FORK,
+ 0);
+ /*
+ * If we get an error at this point we
+ * simply don't bother truncating the file.
+ */
+ if (error) {
+ xfs_trans_cancel(tp,
+ (XFS_TRANS_RELEASE_LOG_RES |
+ XFS_TRANS_ABORT));
+ } else {
+ error = xfs_trans_commit(tp,
+ XFS_TRANS_RELEASE_LOG_RES,
+ NULL);
+ }
+ xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
+ }
+ return (error);
+}
+
+/*
+ * Free a symlink that has blocks associated with it.
+ */
+STATIC int
+xfs_inactive_symlink_rmt(
+ xfs_inode_t *ip,
+ xfs_trans_t **tpp)
+{
+ xfs_buf_t *bp;
+ int committed;
+ int done;
+ int error;
+ xfs_fsblock_t first_block;
+ xfs_bmap_free_t free_list;
+ int i;
+ xfs_mount_t *mp;
+ xfs_bmbt_irec_t mval[SYMLINK_MAPS];
+ int nmaps;
+ xfs_trans_t *ntp;
+ int size;
+ xfs_trans_t *tp;
+
+ tp = *tpp;
+ mp = ip->i_mount;
+ ASSERT(ip->i_d.di_size > XFS_IFORK_DSIZE(ip));
+ /*
+ * We're freeing a symlink that has some
+ * blocks allocated to it. Free the
+ * blocks here. We know that we've got
+ * either 1 or 2 extents and that we can
+ * free them all in one bunmapi call.
+ */
+ ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2);
+ if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0,
+ XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) {
+ ASSERT(XFS_FORCED_SHUTDOWN(mp));
+ xfs_trans_cancel(tp, 0);
+ *tpp = NULL;
+ return error;
+ }
+ /*
+ * Lock the inode, fix the size, and join it to the transaction.
+ * Hold it so in the normal path, we still have it locked for
+ * the second transaction. In the error paths we need it
+ * held so the cancel won't rele it, see below.
+ */
+ xfs_ilock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
+ size = (int)ip->i_d.di_size;
+ ip->i_d.di_size = 0;
+ xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
+ xfs_trans_ihold(tp, ip);
+ xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
+ /*
+ * Find the block(s) so we can inval and unmap them.
+ */
+ done = 0;
+ XFS_BMAP_INIT(&free_list, &first_block);
+ nmaps = sizeof(mval) / sizeof(mval[0]);
+ if ((error = xfs_bmapi(tp, ip, 0, XFS_B_TO_FSB(mp, size),
+ XFS_BMAPI_METADATA, &first_block, 0, mval, &nmaps,
+ &free_list)))
+ goto error0;
+ /*
+ * Invalidate the block(s).
+ */
+ for (i = 0; i < nmaps; i++) {
+ bp = xfs_trans_get_buf(tp, mp->m_ddev_targp,
+ XFS_FSB_TO_DADDR(mp, mval[i].br_startblock),
+ XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0);
+ xfs_trans_binval(tp, bp);
+ }
+ /*
+ * Unmap the dead block(s) to the free_list.
+ */
+ if ((error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps,
+ &first_block, &free_list, &done)))
+ goto error1;
+ ASSERT(done);
+ /*
+ * Commit the first transaction. This logs the EFI and the inode.
+ */
+ if ((error = xfs_bmap_finish(&tp, &free_list, first_block, &committed)))
+ goto error1;
+ /*
+ * The transaction must have been committed, since there were
+ * actually extents freed by xfs_bunmapi. See xfs_bmap_finish.
+ * The new tp has the extent freeing and EFDs.
+ */
+ ASSERT(committed);
+ /*
+ * The first xact was committed, so add the inode to the new one.
+ * Mark it dirty so it will be logged and moved forward in the log as
+ * part of every commit.
+ */
+ xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
+ xfs_trans_ihold(tp, ip);
+ xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
+ /*
+ * Get a new, empty transaction to return to our caller.
+ */
+ ntp = xfs_trans_dup(tp);
+ /*
+ * Commit the transaction containing extent freeing and EFD's.
+ * If we get an error on the commit here or on the reserve below,
+ * we need to unlock the inode since the new transaction doesn't
+ * have the inode attached.
+ */
+ error = xfs_trans_commit(tp, 0, NULL);
+ tp = ntp;
+ if (error) {
+ ASSERT(XFS_FORCED_SHUTDOWN(mp));
+ goto error0;
+ }
+ /*
+ * Remove the memory for extent descriptions (just bookkeeping).
+ */
+ if (ip->i_df.if_bytes)
+ xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK);
+ ASSERT(ip->i_df.if_bytes == 0);
+ /*
+ * Put an itruncate log reservation in the new transaction
+ * for our caller.
+ */
+ if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0,
+ XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) {
+ ASSERT(XFS_FORCED_SHUTDOWN(mp));
+ goto error0;
+ }
+ /*
+ * Return with the inode locked but not joined to the transaction.
+ */
+ *tpp = tp;
+ return 0;
+
+ error1:
+ xfs_bmap_cancel(&free_list);
+ error0:
+ /*
+ * Have to come here with the inode locked and either
+ * (held and in the transaction) or (not in the transaction).
+ * If the inode isn't held then cancel would iput it, but
+ * that's wrong since this is inactive and the vnode ref
+ * count is 0 already.
+ * Cancel won't do anything to the inode if held, but it still
+ * needs to be locked until the cancel is done, if it was
+ * joined to the transaction.
+ */
+ xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
+ xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
+ *tpp = NULL;
+ return error;
+
+}
+
+STATIC int
+xfs_inactive_symlink_local(
+ xfs_inode_t *ip,
+ xfs_trans_t **tpp)
+{
+ int error;
+
+ ASSERT(ip->i_d.di_size <= XFS_IFORK_DSIZE(ip));
+ /*
+ * We're freeing a symlink which fit into
+ * the inode. Just free the memory used
+ * to hold the old symlink.
+ */
+ error = xfs_trans_reserve(*tpp, 0,
+ XFS_ITRUNCATE_LOG_RES(ip->i_mount),
+ 0, XFS_TRANS_PERM_LOG_RES,
+ XFS_ITRUNCATE_LOG_COUNT);
+
+ if (error) {
+ xfs_trans_cancel(*tpp, 0);
+ *tpp = NULL;
+ return (error);
+ }
+ xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
+
+ /*
+ * Zero length symlinks _can_ exist.
+ */
+ if (ip->i_df.if_bytes > 0) {
+ xfs_idata_realloc(ip,
+ -(ip->i_df.if_bytes),
+ XFS_DATA_FORK);
+ ASSERT(ip->i_df.if_bytes == 0);
+ }
+ return (0);
+}
+
+/*
+ *
+ */
+STATIC int
+xfs_inactive_attrs(
+ xfs_inode_t *ip,
+ xfs_trans_t **tpp)
+{
+ xfs_trans_t *tp;
+ int error;
+ xfs_mount_t *mp;
+
+ ASSERT(ismrlocked(&ip->i_iolock, MR_UPDATE));
+ tp = *tpp;
+ mp = ip->i_mount;
+ ASSERT(ip->i_d.di_forkoff != 0);
+ xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
+
+ error = xfs_attr_inactive(ip);
+ if (error) {
+ *tpp = NULL;
+ xfs_iunlock(ip, XFS_IOLOCK_EXCL);
+ return (error); /* goto out*/
+ }
+
+ tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE);
+ error = xfs_trans_reserve(tp, 0,
+ XFS_IFREE_LOG_RES(mp),
+ 0, XFS_TRANS_PERM_LOG_RES,
+ XFS_INACTIVE_LOG_COUNT);
+ if (error) {
+ ASSERT(XFS_FORCED_SHUTDOWN(mp));
+ xfs_trans_cancel(tp, 0);
+ *tpp = NULL;
+ xfs_iunlock(ip, XFS_IOLOCK_EXCL);
+ return (error);
+ }
+
+ xfs_ilock(ip, XFS_ILOCK_EXCL);
+ xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
+ xfs_trans_ihold(tp, ip);
+ xfs_idestroy_fork(ip, XFS_ATTR_FORK);
+
+ ASSERT(ip->i_d.di_anextents == 0);
+
+ *tpp = tp;
+ return (0);
+}
+
+STATIC int
+xfs_release(
+ bhv_desc_t *bdp)
+{
+ xfs_inode_t *ip;
+ vnode_t *vp;
+ xfs_mount_t *mp;
+ int error;
+
+ vp = BHV_TO_VNODE(bdp);
+ ip = XFS_BHVTOI(bdp);
+
+ if ((vp->v_type != VREG) || (ip->i_d.di_mode == 0)) {
+ return 0;
+ }
+
+ /* If this is a read-only mount, don't do this (would generate I/O) */
+ if (vp->v_vfsp->vfs_flag & VFS_RDONLY)
+ return 0;
+
+#ifdef HAVE_REFCACHE
+ /* If we are in the NFS reference cache then don't do this now */
+ if (ip->i_refcache)
+ return 0;
+#endif
+
+ mp = ip->i_mount;
+
+ if (ip->i_d.di_nlink != 0) {
+ if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) &&
+ ((ip->i_d.di_size > 0) || (VN_CACHED(vp) > 0)) &&
+ (ip->i_df.if_flags & XFS_IFEXTENTS)) &&
+ (!(ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC|XFS_DIFLAG_APPEND)))) {
+ if ((error = xfs_inactive_free_eofblocks(mp, ip)))
+ return (error);
+ /* Update linux inode block count after free above */
+ LINVFS_GET_IP(vp)->i_blocks = XFS_FSB_TO_BB(mp,
+ ip->i_d.di_nblocks + ip->i_delayed_blks);
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * xfs_inactive
+ *
+ * This is called when the vnode reference count for the vnode
+ * goes to zero. If the file has been unlinked, then it must
+ * now be truncated. Also, we clear all of the read-ahead state
+ * kept for the inode here since the file is now closed.
+ */
+STATIC int
+xfs_inactive(
+ bhv_desc_t *bdp,
+ cred_t *credp)
+{
+ xfs_inode_t *ip;
+ vnode_t *vp;
+ xfs_bmap_free_t free_list;
+ xfs_fsblock_t first_block;
+ int committed;
+ xfs_trans_t *tp;
+ xfs_mount_t *mp;
+ int error;
+ int truncate;
+
+ vp = BHV_TO_VNODE(bdp);
+ vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
+
+ ip = XFS_BHVTOI(bdp);
+
+ /*
+ * If the inode is already free, then there can be nothing
+ * to clean up here.
+ */
+ if (ip->i_d.di_mode == 0) {
+ ASSERT(ip->i_df.if_real_bytes == 0);
+ ASSERT(ip->i_df.if_broot_bytes == 0);
+ return VN_INACTIVE_CACHE;
+ }
+
+ /*
+ * Only do a truncate if it's a regular file with
+ * some actual space in it. It's OK to look at the
+ * inode's fields without the lock because we're the
+ * only one with a reference to the inode.
+ */
+ truncate = ((ip->i_d.di_nlink == 0) &&
+ ((ip->i_d.di_size != 0) || (ip->i_d.di_nextents > 0)) &&
+ ((ip->i_d.di_mode & S_IFMT) == S_IFREG));
+
+ mp = ip->i_mount;
+
+ if (ip->i_d.di_nlink == 0 &&
+ DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_DESTROY)) {
+ (void) XFS_SEND_DESTROY(mp, vp, DM_RIGHT_NULL);
+ }
+
+ error = 0;
+
+ /* If this is a read-only mount, don't do this (would generate I/O) */
+ if (vp->v_vfsp->vfs_flag & VFS_RDONLY)
+ goto out;
+
+ if (ip->i_d.di_nlink != 0) {
+ if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) &&
+ ((ip->i_d.di_size > 0) || (VN_CACHED(vp) > 0)) &&
+ (ip->i_df.if_flags & XFS_IFEXTENTS)) &&
+ (!(ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC|XFS_DIFLAG_APPEND)) ||
+ (ip->i_delayed_blks != 0))) {
+ if ((error = xfs_inactive_free_eofblocks(mp, ip)))
+ return (VN_INACTIVE_CACHE);
+ /* Update linux inode block count after free above */
+ LINVFS_GET_IP(vp)->i_blocks = XFS_FSB_TO_BB(mp,
+ ip->i_d.di_nblocks + ip->i_delayed_blks);
+ }
+ goto out;
+ }
+
+ ASSERT(ip->i_d.di_nlink == 0);
+
+ if ((error = XFS_QM_DQATTACH(mp, ip, 0)))
+ return (VN_INACTIVE_CACHE);
+
+ tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE);
+ if (truncate) {
+ /*
+ * Do the xfs_itruncate_start() call before
+ * reserving any log space because itruncate_start
+ * will call into the buffer cache and we can't
+ * do that within a transaction.
+ */
+ xfs_ilock(ip, XFS_IOLOCK_EXCL);
+
+ xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE, 0);
+
+ error = xfs_trans_reserve(tp, 0,
+ XFS_ITRUNCATE_LOG_RES(mp),
+ 0, XFS_TRANS_PERM_LOG_RES,
+ XFS_ITRUNCATE_LOG_COUNT);
+ if (error) {
+ /* Don't call itruncate_cleanup */
+ ASSERT(XFS_FORCED_SHUTDOWN(mp));
+ xfs_trans_cancel(tp, 0);
+ xfs_iunlock(ip, XFS_IOLOCK_EXCL);
+ return (VN_INACTIVE_CACHE);
+ }
+
+ xfs_ilock(ip, XFS_ILOCK_EXCL);
+ xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
+ xfs_trans_ihold(tp, ip);
+
+ /*
+ * normally, we have to run xfs_itruncate_finish sync.
+ * But if filesystem is wsync and we're in the inactive
+ * path, then we know that nlink == 0, and that the
+ * xaction that made nlink == 0 is permanently committed
+ * since xfs_remove runs as a synchronous transaction.
+ */
+ error = xfs_itruncate_finish(&tp, ip, 0, XFS_DATA_FORK,
+ (!(mp->m_flags & XFS_MOUNT_WSYNC) ? 1 : 0));
+
+ if (error) {
+ xfs_trans_cancel(tp,
+ XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
+ xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
+ return (VN_INACTIVE_CACHE);
+ }
+ } else if ((ip->i_d.di_mode & S_IFMT) == S_IFLNK) {
+
+ /*
+ * If we get an error while cleaning up a
+ * symlink we bail out.
+ */
+ error = (ip->i_d.di_size > XFS_IFORK_DSIZE(ip)) ?
+ xfs_inactive_symlink_rmt(ip, &tp) :
+ xfs_inactive_symlink_local(ip, &tp);
+
+ if (error) {
+ ASSERT(tp == NULL);
+ return (VN_INACTIVE_CACHE);
+ }
+
+ xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
+ xfs_trans_ihold(tp, ip);
+ } else {
+ error = xfs_trans_reserve(tp, 0,
+ XFS_IFREE_LOG_RES(mp),
+ 0, XFS_TRANS_PERM_LOG_RES,
+ XFS_INACTIVE_LOG_COUNT);
+ if (error) {
+ ASSERT(XFS_FORCED_SHUTDOWN(mp));
+ xfs_trans_cancel(tp, 0);
+ return (VN_INACTIVE_CACHE);
+ }
+
+ xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
+ xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
+ xfs_trans_ihold(tp, ip);
+ }
+
+ /*
+ * If there are attributes associated with the file
+ * then blow them away now. The code calls a routine
+ * that recursively deconstructs the attribute fork.
+ * We need to just commit the current transaction
+ * because we can't use it for xfs_attr_inactive().
+ */
+ if (ip->i_d.di_anextents > 0) {
+ error = xfs_inactive_attrs(ip, &tp);
+ /*
+ * If we got an error, the transaction is already
+ * cancelled, and the inode is unlocked. Just get out.
+ */
+ if (error)
+ return (VN_INACTIVE_CACHE);
+ } else if (ip->i_afp) {
+ xfs_idestroy_fork(ip, XFS_ATTR_FORK);
+ }
+
+ /*
+ * Free the inode.
+ */
+ XFS_BMAP_INIT(&free_list, &first_block);
+ error = xfs_ifree(tp, ip, &free_list);
+ if (error) {
+ /*
+ * If we fail to free the inode, shut down. The cancel
+ * might do that, we need to make sure. Otherwise the
+ * inode might be lost for a long time or forever.
+ */
+ if (!XFS_FORCED_SHUTDOWN(mp)) {
+ cmn_err(CE_NOTE,
+ "xfs_inactive: xfs_ifree() returned an error = %d on %s",
+ error, mp->m_fsname);
+ xfs_force_shutdown(mp, XFS_METADATA_IO_ERROR);
+ }
+ xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT);
+ } else {
+ /*
+ * Credit the quota account(s). The inode is gone.
+ */
+ XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_ICOUNT, -1);
+
+ /*
+ * Just ignore errors at this point. There is
+ * nothing we can do except to try to keep going.
+ */
+ (void) xfs_bmap_finish(&tp, &free_list, first_block,
+ &committed);
+ (void) xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
+ }
+ /*
+ * Release the dquots held by inode, if any.
+ */
+ XFS_QM_DQDETACH(mp, ip);
+
+ xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
+
+ out:
+ return VN_INACTIVE_CACHE;
+}
+
+
+/*
+ * xfs_lookup
+ */
+STATIC int
+xfs_lookup(
+ bhv_desc_t *dir_bdp,
+ vname_t *dentry,
+ vnode_t **vpp,
+ int flags,
+ vnode_t *rdir,
+ cred_t *credp)
+{
+ xfs_inode_t *dp, *ip;
+ xfs_ino_t e_inum;
+ int error;
+ uint lock_mode;
+ vnode_t *dir_vp;
+
+ dir_vp = BHV_TO_VNODE(dir_bdp);
+ vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address);
+
+ dp = XFS_BHVTOI(dir_bdp);
+
+ if (XFS_FORCED_SHUTDOWN(dp->i_mount))
+ return XFS_ERROR(EIO);
+
+ lock_mode = xfs_ilock_map_shared(dp);
+ error = xfs_dir_lookup_int(dir_bdp, lock_mode, dentry, &e_inum, &ip);
+ if (!error) {
+ *vpp = XFS_ITOV(ip);
+ ITRACE(ip);
+ }
+ xfs_iunlock_map_shared(dp, lock_mode);
+ return error;
+}
+
+
+#define XFS_CREATE_NEW_MAXTRIES 10000
+
+/*
+ * xfs_create (create a new file).
+ */
+STATIC int
+xfs_create(
+ bhv_desc_t *dir_bdp,
+ vname_t *dentry,
+ vattr_t *vap,
+ vnode_t **vpp,
+ cred_t *credp)
+{
+ char *name = VNAME(dentry);
+ vnode_t *dir_vp;
+ xfs_inode_t *dp, *ip;
+ vnode_t *vp=NULL;
+ xfs_trans_t *tp;
+ xfs_mount_t *mp;
+ xfs_dev_t rdev;
+ int error;
+ xfs_bmap_free_t free_list;
+ xfs_fsblock_t first_block;
+ boolean_t dp_joined_to_trans;
+ int dm_event_sent = 0;
+ uint cancel_flags;
+ int committed;
+ xfs_prid_t prid;
+ struct xfs_dquot *udqp, *gdqp;
+ uint resblks;
+ int dm_di_mode;
+ int namelen;
+
+ ASSERT(!*vpp);
+ dir_vp = BHV_TO_VNODE(dir_bdp);
+ vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address);
+
+ dp = XFS_BHVTOI(dir_bdp);
+ mp = dp->i_mount;
+
+ dm_di_mode = vap->va_mode|VTTOIF(vap->va_type);
+ namelen = VNAMELEN(dentry);
+
+ if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_CREATE)) {
+ error = XFS_SEND_NAMESP(mp, DM_EVENT_CREATE,
+ dir_vp, DM_RIGHT_NULL, NULL,
+ DM_RIGHT_NULL, name, NULL,
+ dm_di_mode, 0, 0);
+
+ if (error)
+ return error;
+ dm_event_sent = 1;
+ }
+
+ if (XFS_FORCED_SHUTDOWN(mp))
+ return XFS_ERROR(EIO);
+
+ /* Return through std_return after this point. */
+
+ udqp = gdqp = NULL;
+ if (vap->va_mask & XFS_AT_PROJID)
+ prid = (xfs_prid_t)vap->va_projid;
+ else
+ prid = (xfs_prid_t)dfltprid;
+
+ /*
+ * Make sure that we have allocated dquot(s) on disk.
+ */
+ error = XFS_QM_DQVOPALLOC(mp, dp,
+ current_fsuid(credp), current_fsgid(credp),
+ XFS_QMOPT_QUOTALL|XFS_QMOPT_INHERIT, &udqp, &gdqp);
+ if (error)
+ goto std_return;
+
+ ip = NULL;
+ dp_joined_to_trans = B_FALSE;
+
+ tp = xfs_trans_alloc(mp, XFS_TRANS_CREATE);
+ cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
+ resblks = XFS_CREATE_SPACE_RES(mp, namelen);
+ /*
+ * Initially assume that the file does not exist and
+ * reserve the resources for that case. If that is not
+ * the case we'll drop the one we have and get a more
+ * appropriate transaction later.
+ */
+ error = xfs_trans_reserve(tp, resblks, XFS_CREATE_LOG_RES(mp), 0,
+ XFS_TRANS_PERM_LOG_RES, XFS_CREATE_LOG_COUNT);
+ if (error == ENOSPC) {
+ resblks = 0;
+ error = xfs_trans_reserve(tp, 0, XFS_CREATE_LOG_RES(mp), 0,
+ XFS_TRANS_PERM_LOG_RES, XFS_CREATE_LOG_COUNT);
+ }
+ if (error) {
+ cancel_flags = 0;
+ dp = NULL;
+ goto error_return;
+ }
+
+ xfs_ilock(dp, XFS_ILOCK_EXCL);
+
+ XFS_BMAP_INIT(&free_list, &first_block);
+
+ ASSERT(ip == NULL);
+
+ /*
+ * Reserve disk quota and the inode.
+ */
+ error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0);
+ if (error)
+ goto error_return;
+
+ if (resblks == 0 &&
+ (error = XFS_DIR_CANENTER(mp, tp, dp, name, namelen)))
+ goto error_return;
+ rdev = (vap->va_mask & XFS_AT_RDEV) ? vap->va_rdev : 0;
+ error = xfs_dir_ialloc(&tp, dp,
+ MAKEIMODE(vap->va_type,vap->va_mode), 1,
+ rdev, credp, prid, resblks > 0,
+ &ip, &committed);
+ if (error) {
+ if (error == ENOSPC)
+ goto error_return;
+ goto abort_return;
+ }
+ ITRACE(ip);
+
+ /*
+ * At this point, we've gotten a newly allocated inode.
+ * It is locked (and joined to the transaction).
+ */
+
+ ASSERT(ismrlocked (&ip->i_lock, MR_UPDATE));
+
+ /*
+ * Now we join the directory inode to the transaction.
+ * We do not do it earlier because xfs_dir_ialloc
+ * might commit the previous transaction (and release
+ * all the locks).
+ */
+
+ VN_HOLD(dir_vp);
+ xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
+ dp_joined_to_trans = B_TRUE;
+
+ error = XFS_DIR_CREATENAME(mp, tp, dp, name, namelen, ip->i_ino,
+ &first_block, &free_list,
+ resblks ? resblks - XFS_IALLOC_SPACE_RES(mp) : 0);
+ if (error) {
+ ASSERT(error != ENOSPC);
+ goto abort_return;
+ }
+ xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
+ xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
+
+ /*
+ * If this is a synchronous mount, make sure that the
+ * create transaction goes to disk before returning to
+ * the user.
+ */
+ if (mp->m_flags & XFS_MOUNT_WSYNC) {
+ xfs_trans_set_sync(tp);
+ }
+
+ dp->i_gen++;
+
+ /*
+ * Attach the dquot(s) to the inodes and modify them incore.
+ * These ids of the inode couldn't have changed since the new
+ * inode has been locked ever since it was created.
+ */
+ XFS_QM_DQVOPCREATE(mp, tp, ip, udqp, gdqp);
+
+ /*
+ * xfs_trans_commit normally decrements the vnode ref count
+ * when it unlocks the inode. Since we want to return the
+ * vnode to the caller, we bump the vnode ref count now.
+ */
+ IHOLD(ip);
+ vp = XFS_ITOV(ip);
+
+ error = xfs_bmap_finish(&tp, &free_list, first_block, &committed);
+ if (error) {
+ xfs_bmap_cancel(&free_list);
+ goto abort_rele;
+ }
+
+ error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
+ if (error) {
+ IRELE(ip);
+ tp = NULL;
+ goto error_return;
+ }
+
+ XFS_QM_DQRELE(mp, udqp);
+ XFS_QM_DQRELE(mp, gdqp);
+
+ /*
+ * Propogate the fact that the vnode changed after the
+ * xfs_inode locks have been released.
+ */
+ VOP_VNODE_CHANGE(vp, VCHANGE_FLAGS_TRUNCATED, 3);
+
+ *vpp = vp;
+
+ /* Fallthrough to std_return with error = 0 */
+
+std_return:
+ if ( (*vpp || (error != 0 && dm_event_sent != 0)) &&
+ DM_EVENT_ENABLED(dir_vp->v_vfsp, XFS_BHVTOI(dir_bdp),
+ DM_EVENT_POSTCREATE)) {
+ (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTCREATE,
+ dir_vp, DM_RIGHT_NULL,
+ *vpp ? vp:NULL,
+ DM_RIGHT_NULL, name, NULL,
+ dm_di_mode, error, 0);
+ }
+ return error;
+
+ abort_return:
+ cancel_flags |= XFS_TRANS_ABORT;
+ /* FALLTHROUGH */
+ error_return:
+
+ if (tp != NULL)
+ xfs_trans_cancel(tp, cancel_flags);
+
+ if (!dp_joined_to_trans && (dp != NULL))
+ xfs_iunlock(dp, XFS_ILOCK_EXCL);
+ XFS_QM_DQRELE(mp, udqp);
+ XFS_QM_DQRELE(mp, gdqp);
+
+ goto std_return;
+
+ abort_rele:
+ /*
+ * Wait until after the current transaction is aborted to
+ * release the inode. This prevents recursive transactions
+ * and deadlocks from xfs_inactive.
+ */
+ cancel_flags |= XFS_TRANS_ABORT;
+ xfs_trans_cancel(tp, cancel_flags);
+ IRELE(ip);
+
+ XFS_QM_DQRELE(mp, udqp);
+ XFS_QM_DQRELE(mp, gdqp);
+
+ goto std_return;
+}
+
+#ifdef DEBUG
+/*
+ * Some counters to see if (and how often) we are hitting some deadlock
+ * prevention code paths.
+ */
+
+int xfs_rm_locks;
+int xfs_rm_lock_delays;
+int xfs_rm_attempts;
+#endif
+
+/*
+ * The following routine will lock the inodes associated with the
+ * directory and the named entry in the directory. The locks are
+ * acquired in increasing inode number.
+ *
+ * If the entry is "..", then only the directory is locked. The
+ * vnode ref count will still include that from the .. entry in
+ * this case.
+ *
+ * There is a deadlock we need to worry about. If the locked directory is
+ * in the AIL, it might be blocking up the log. The next inode we lock
+ * could be already locked by another thread waiting for log space (e.g
+ * a permanent log reservation with a long running transaction (see
+ * xfs_itruncate_finish)). To solve this, we must check if the directory
+ * is in the ail and use lock_nowait. If we can't lock, we need to
+ * drop the inode lock on the directory and try again. xfs_iunlock will
+ * potentially push the tail if we were holding up the log.
+ */
+STATIC int
+xfs_lock_dir_and_entry(
+ xfs_inode_t *dp,
+ vname_t *dentry,
+ xfs_inode_t *ip) /* inode of entry 'name' */
+{
+ int attempts;
+ xfs_ino_t e_inum;
+ xfs_inode_t *ips[2];
+ xfs_log_item_t *lp;
+
+#ifdef DEBUG
+ xfs_rm_locks++;
+#endif
+ attempts = 0;
+
+again:
+ xfs_ilock(dp, XFS_ILOCK_EXCL);
+
+ e_inum = ip->i_ino;
+
+ ITRACE(ip);
+
+ /*
+ * We want to lock in increasing inum. Since we've already
+ * acquired the lock on the directory, we may need to release
+ * if if the inum of the entry turns out to be less.
+ */
+ if (e_inum > dp->i_ino) {
+ /*
+ * We are already in the right order, so just
+ * lock on the inode of the entry.
+ * We need to use nowait if dp is in the AIL.
+ */
+
+ lp = (xfs_log_item_t *)dp->i_itemp;
+ if (lp && (lp->li_flags & XFS_LI_IN_AIL)) {
+ if (!xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) {
+ attempts++;
+#ifdef DEBUG
+ xfs_rm_attempts++;
+#endif
+
+ /*
+ * Unlock dp and try again.
+ * xfs_iunlock will try to push the tail
+ * if the inode is in the AIL.
+ */
+
+ xfs_iunlock(dp, XFS_ILOCK_EXCL);
+
+ if ((attempts % 5) == 0) {
+ delay(1); /* Don't just spin the CPU */
+#ifdef DEBUG
+ xfs_rm_lock_delays++;
+#endif
+ }
+ goto again;
+ }
+ } else {
+ xfs_ilock(ip, XFS_ILOCK_EXCL);
+ }
+ } else if (e_inum < dp->i_ino) {
+ xfs_iunlock(dp, XFS_ILOCK_EXCL);
+
+ ips[0] = ip;
+ ips[1] = dp;
+ xfs_lock_inodes(ips, 2, 0, XFS_ILOCK_EXCL);
+ }
+ /* else e_inum == dp->i_ino */
+ /* This can happen if we're asked to lock /x/..
+ * the entry is "..", which is also the parent directory.
+ */
+
+ return 0;
+}
+
+#ifdef DEBUG
+int xfs_locked_n;
+int xfs_small_retries;
+int xfs_middle_retries;
+int xfs_lots_retries;
+int xfs_lock_delays;
+#endif
+
+/*
+ * The following routine will lock n inodes in exclusive mode.
+ * We assume the caller calls us with the inodes in i_ino order.
+ *
+ * We need to detect deadlock where an inode that we lock
+ * is in the AIL and we start waiting for another inode that is locked
+ * by a thread in a long running transaction (such as truncate). This can
+ * result in deadlock since the long running trans might need to wait
+ * for the inode we just locked in order to push the tail and free space
+ * in the log.
+ */
+void
+xfs_lock_inodes(
+ xfs_inode_t **ips,
+ int inodes,
+ int first_locked,
+ uint lock_mode)
+{
+ int attempts = 0, i, j, try_lock;
+ xfs_log_item_t *lp;
+
+ ASSERT(ips && (inodes >= 2)); /* we need at least two */
+
+ if (first_locked) {
+ try_lock = 1;
+ i = 1;
+ } else {
+ try_lock = 0;
+ i = 0;
+ }
+
+again:
+ for (; i < inodes; i++) {
+ ASSERT(ips[i]);
+
+ if (i && (ips[i] == ips[i-1])) /* Already locked */
+ continue;
+
+ /*
+ * If try_lock is not set yet, make sure all locked inodes
+ * are not in the AIL.
+ * If any are, set try_lock to be used later.
+ */
+
+ if (!try_lock) {
+ for (j = (i - 1); j >= 0 && !try_lock; j--) {
+ lp = (xfs_log_item_t *)ips[j]->i_itemp;
+ if (lp && (lp->li_flags & XFS_LI_IN_AIL)) {
+ try_lock++;
+ }
+ }
+ }
+
+ /*
+ * If any of the previous locks we have locked is in the AIL,
+ * we must TRY to get the second and subsequent locks. If
+ * we can't get any, we must release all we have
+ * and try again.
+ */
+
+ if (try_lock) {
+ /* try_lock must be 0 if i is 0. */
+ /*
+ * try_lock means we have an inode locked
+ * that is in the AIL.
+ */
+ ASSERT(i != 0);
+ if (!xfs_ilock_nowait(ips[i], lock_mode)) {
+ attempts++;
+
+ /*
+ * Unlock all previous guys and try again.
+ * xfs_iunlock will try to push the tail
+ * if the inode is in the AIL.
+ */
+
+ for(j = i - 1; j >= 0; j--) {
+
+ /*
+ * Check to see if we've already
+ * unlocked this one.
+ * Not the first one going back,
+ * and the inode ptr is the same.
+ */
+ if ((j != (i - 1)) && ips[j] ==
+ ips[j+1])
+ continue;
+
+ xfs_iunlock(ips[j], lock_mode);
+ }
+
+ if ((attempts % 5) == 0) {
+ delay(1); /* Don't just spin the CPU */
+#ifdef DEBUG
+ xfs_lock_delays++;
+#endif
+ }
+ i = 0;
+ try_lock = 0;
+ goto again;
+ }
+ } else {
+ xfs_ilock(ips[i], lock_mode);
+ }
+ }
+
+#ifdef DEBUG
+ if (attempts) {
+ if (attempts < 5) xfs_small_retries++;
+ else if (attempts < 100) xfs_middle_retries++;
+ else xfs_lots_retries++;
+ } else {
+ xfs_locked_n++;
+ }
+#endif
+}
+
+#ifdef DEBUG
+#define REMOVE_DEBUG_TRACE(x) {remove_which_error_return = (x);}
+int remove_which_error_return = 0;
+#else /* ! DEBUG */
+#define REMOVE_DEBUG_TRACE(x)
+#endif /* ! DEBUG */
+
+
+/*
+ * xfs_remove
+ *
+ */
+STATIC int
+xfs_remove(
+ bhv_desc_t *dir_bdp,
+ vname_t *dentry,
+ cred_t *credp)
+{
+ vnode_t *dir_vp;
+ char *name = VNAME(dentry);
+ xfs_inode_t *dp, *ip;
+ xfs_trans_t *tp = NULL;
+ xfs_mount_t *mp;
+ int error = 0;
+ xfs_bmap_free_t free_list;
+ xfs_fsblock_t first_block;
+ int cancel_flags;
+ int committed;
+ int dm_di_mode = 0;
+ int link_zero;
+ uint resblks;
+ int namelen;
+
+ dir_vp = BHV_TO_VNODE(dir_bdp);
+ vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address);
+
+ dp = XFS_BHVTOI(dir_bdp);
+ mp = dp->i_mount;
+
+ if (XFS_FORCED_SHUTDOWN(mp))
+ return XFS_ERROR(EIO);
+
+ namelen = VNAMELEN(dentry);
+
+ if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_REMOVE)) {
+ error = XFS_SEND_NAMESP(mp, DM_EVENT_REMOVE, dir_vp,
+ DM_RIGHT_NULL, NULL, DM_RIGHT_NULL,
+ name, NULL, 0, 0, 0);
+ if (error)
+ return error;
+ }
+
+ /* From this point on, return through std_return */
+ ip = NULL;
+
+ /*
+ * We need to get a reference to ip before we get our log
+ * reservation. The reason for this is that we cannot call
+ * xfs_iget for an inode for which we do not have a reference
+ * once we've acquired a log reservation. This is because the
+ * inode we are trying to get might be in xfs_inactive going
+ * for a log reservation. Since we'll have to wait for the
+ * inactive code to complete before returning from xfs_iget,
+ * we need to make sure that we don't have log space reserved
+ * when we call xfs_iget. Instead we get an unlocked referece
+ * to the inode before getting our log reservation.
+ */
+ error = xfs_get_dir_entry(dentry, &ip);
+ if (error) {
+ REMOVE_DEBUG_TRACE(__LINE__);
+ goto std_return;
+ }
+
+ dm_di_mode = ip->i_d.di_mode;
+
+ vn_trace_entry(XFS_ITOV(ip), __FUNCTION__, (inst_t *)__return_address);
+
+ ITRACE(ip);
+
+ error = XFS_QM_DQATTACH(mp, dp, 0);
+ if (!error && dp != ip)
+ error = XFS_QM_DQATTACH(mp, ip, 0);
+ if (error) {
+ REMOVE_DEBUG_TRACE(__LINE__);
+ IRELE(ip);
+ goto std_return;
+ }
+
+ tp = xfs_trans_alloc(mp, XFS_TRANS_REMOVE);
+ cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
+ /*
+ * We try to get the real space reservation first,
+ * allowing for directory btree deletion(s) implying
+ * possible bmap insert(s). If we can't get the space
+ * reservation then we use 0 instead, and avoid the bmap
+ * btree insert(s) in the directory code by, if the bmap
+ * insert tries to happen, instead trimming the LAST
+ * block from the directory.
+ */
+ resblks = XFS_REMOVE_SPACE_RES(mp);
+ error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0,
+ XFS_TRANS_PERM_LOG_RES, XFS_REMOVE_LOG_COUNT);
+ if (error == ENOSPC) {
+ resblks = 0;
+ error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0,
+ XFS_TRANS_PERM_LOG_RES, XFS_REMOVE_LOG_COUNT);
+ }
+ if (error) {
+ ASSERT(error != ENOSPC);
+ REMOVE_DEBUG_TRACE(__LINE__);
+ xfs_trans_cancel(tp, 0);
+ IRELE(ip);
+ return error;
+ }
+
+ error = xfs_lock_dir_and_entry(dp, dentry, ip);
+ if (error) {
+ REMOVE_DEBUG_TRACE(__LINE__);
+ xfs_trans_cancel(tp, cancel_flags);
+ IRELE(ip);
+ goto std_return;
+ }
+
+ /*
+ * At this point, we've gotten both the directory and the entry
+ * inodes locked.
+ */
+ xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
+ if (dp != ip) {
+ /*
+ * Increment vnode ref count only in this case since
+ * there's an extra vnode reference in the case where
+ * dp == ip.
+ */
+ IHOLD(dp);
+ xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
+ }
+
+ if ((error = _MAC_XFS_IACCESS(ip, MACWRITE, credp))) {
+ REMOVE_DEBUG_TRACE(__LINE__);
+ goto error_return;
+ }
+
+ /*
+ * Entry must exist since we did a lookup in xfs_lock_dir_and_entry.
+ */
+ XFS_BMAP_INIT(&free_list, &first_block);
+ error = XFS_DIR_REMOVENAME(mp, tp, dp, name, namelen, ip->i_ino,
+ &first_block, &free_list, 0);
+ if (error) {
+ ASSERT(error != ENOENT);
+ REMOVE_DEBUG_TRACE(__LINE__);
+ goto error1;
+ }
+ xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
+
+ dp->i_gen++;
+ xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
+
+ error = xfs_droplink(tp, ip);
+ if (error) {
+ REMOVE_DEBUG_TRACE(__LINE__);
+ goto error1;
+ }
+
+ /* Determine if this is the last link while
+ * we are in the transaction.
+ */
+ link_zero = (ip)->i_d.di_nlink==0;
+
+ /*
+ * Take an extra ref on the inode so that it doesn't
+ * go to xfs_inactive() from within the commit.
+ */
+ IHOLD(ip);
+
+ /*
+ * If this is a synchronous mount, make sure that the
+ * remove transaction goes to disk before returning to
+ * the user.
+ */
+ if (mp->m_flags & XFS_MOUNT_WSYNC) {
+ xfs_trans_set_sync(tp);
+ }
+
+ error = xfs_bmap_finish(&tp, &free_list, first_block, &committed);
+ if (error) {
+ REMOVE_DEBUG_TRACE(__LINE__);
+ goto error_rele;
+ }
+
+ error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
+ if (error) {
+ IRELE(ip);
+ goto std_return;
+ }
+
+ /*
+ * Before we drop our extra reference to the inode, purge it
+ * from the refcache if it is there. By waiting until afterwards
+ * to do the IRELE, we ensure that we won't go inactive in the
+ * xfs_refcache_purge_ip routine (although that would be OK).
+ */
+ xfs_refcache_purge_ip(ip);
+
+ vn_trace_exit(XFS_ITOV(ip), __FUNCTION__, (inst_t *)__return_address);
+
+ /*
+ * Let interposed file systems know about removed links.
+ */
+ VOP_LINK_REMOVED(XFS_ITOV(ip), dir_vp, link_zero);
+
+ IRELE(ip);
+
+/* Fall through to std_return with error = 0 */
+ std_return:
+ if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp,
+ DM_EVENT_POSTREMOVE)) {
+ (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTREMOVE,
+ dir_vp, DM_RIGHT_NULL,
+ NULL, DM_RIGHT_NULL,
+ name, NULL, dm_di_mode, error, 0);
+ }
+ return error;
+
+ error1:
+ xfs_bmap_cancel(&free_list);
+ cancel_flags |= XFS_TRANS_ABORT;
+
+ error_return:
+ xfs_trans_cancel(tp, cancel_flags);
+ goto std_return;
+
+ error_rele:
+ /*
+ * In this case make sure to not release the inode until after
+ * the current transaction is aborted. Releasing it beforehand
+ * can cause us to go to xfs_inactive and start a recursive
+ * transaction which can easily deadlock with the current one.
+ */
+ xfs_bmap_cancel(&free_list);
+ cancel_flags |= XFS_TRANS_ABORT;
+ xfs_trans_cancel(tp, cancel_flags);
+
+ /*
+ * Before we drop our extra reference to the inode, purge it
+ * from the refcache if it is there. By waiting until afterwards
+ * to do the IRELE, we ensure that we won't go inactive in the
+ * xfs_refcache_purge_ip routine (although that would be OK).
+ */
+ xfs_refcache_purge_ip(ip);
+
+ IRELE(ip);
+
+ goto std_return;
+}
+
+
+/*
+ * xfs_link
+ *
+ */
+STATIC int
+xfs_link(
+ bhv_desc_t *target_dir_bdp,
+ vnode_t *src_vp,
+ vname_t *dentry,
+ cred_t *credp)
+{
+ xfs_inode_t *tdp, *sip;
+ xfs_trans_t *tp;
+ xfs_mount_t *mp;
+ xfs_inode_t *ips[2];
+ int error;
+ xfs_bmap_free_t free_list;
+ xfs_fsblock_t first_block;
+ int cancel_flags;
+ int committed;
+ vnode_t *target_dir_vp;
+ bhv_desc_t *src_bdp;
+ int resblks;
+ char *target_name = VNAME(dentry);
+ int target_namelen;
+
+ target_dir_vp = BHV_TO_VNODE(target_dir_bdp);
+ vn_trace_entry(target_dir_vp, __FUNCTION__, (inst_t *)__return_address);
+ vn_trace_entry(src_vp, __FUNCTION__, (inst_t *)__return_address);
+
+ target_namelen = VNAMELEN(dentry);
+ if (src_vp->v_type == VDIR)
+ return XFS_ERROR(EPERM);
+
+ /*
+ * For now, manually find the XFS behavior descriptor for
+ * the source vnode. If it doesn't exist then something
+ * is wrong and we should just return an error.
+ * Eventually we need to figure out how link is going to
+ * work in the face of stacked vnodes.
+ */
+ src_bdp = vn_bhv_lookup_unlocked(VN_BHV_HEAD(src_vp), &xfs_vnodeops);
+ if (src_bdp == NULL) {
+ return XFS_ERROR(EXDEV);
+ }
+ sip = XFS_BHVTOI(src_bdp);
+ tdp = XFS_BHVTOI(target_dir_bdp);
+ mp = tdp->i_mount;
+ if (XFS_FORCED_SHUTDOWN(mp))
+ return XFS_ERROR(EIO);
+
+ if (DM_EVENT_ENABLED(src_vp->v_vfsp, tdp, DM_EVENT_LINK)) {
+ error = XFS_SEND_NAMESP(mp, DM_EVENT_LINK,
+ target_dir_vp, DM_RIGHT_NULL,
+ src_vp, DM_RIGHT_NULL,
+ target_name, NULL, 0, 0, 0);
+ if (error)
+ return error;
+ }
+
+ /* Return through std_return after this point. */
+
+ error = XFS_QM_DQATTACH(mp, sip, 0);
+ if (!error && sip != tdp)
+ error = XFS_QM_DQATTACH(mp, tdp, 0);
+ if (error)
+ goto std_return;
+
+ tp = xfs_trans_alloc(mp, XFS_TRANS_LINK);
+ cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
+ resblks = XFS_LINK_SPACE_RES(mp, target_namelen);
+ error = xfs_trans_reserve(tp, resblks, XFS_LINK_LOG_RES(mp), 0,
+ XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT);
+ if (error == ENOSPC) {
+ resblks = 0;
+ error = xfs_trans_reserve(tp, 0, XFS_LINK_LOG_RES(mp), 0,
+ XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT);
+ }
+ if (error) {
+ cancel_flags = 0;
+ goto error_return;
+ }
+
+ if (sip->i_ino < tdp->i_ino) {
+ ips[0] = sip;
+ ips[1] = tdp;
+ } else {
+ ips[0] = tdp;
+ ips[1] = sip;
+ }
+
+ xfs_lock_inodes(ips, 2, 0, XFS_ILOCK_EXCL);
+
+ /*
+ * Increment vnode ref counts since xfs_trans_commit &
+ * xfs_trans_cancel will both unlock the inodes and
+ * decrement the associated ref counts.
+ */
+ VN_HOLD(src_vp);
+ VN_HOLD(target_dir_vp);
+ xfs_trans_ijoin(tp, sip, XFS_ILOCK_EXCL);
+ xfs_trans_ijoin(tp, tdp, XFS_ILOCK_EXCL);
+
+ /*
+ * If the source has too many links, we can't make any more to it.
+ */
+ if (sip->i_d.di_nlink >= XFS_MAXLINK) {
+ error = XFS_ERROR(EMLINK);
+ goto error_return;
+ }
+
+ if (resblks == 0 &&
+ (error = XFS_DIR_CANENTER(mp, tp, tdp, target_name,
+ target_namelen)))
+ goto error_return;
+
+ XFS_BMAP_INIT(&free_list, &first_block);
+
+ error = XFS_DIR_CREATENAME(mp, tp, tdp, target_name, target_namelen,
+ sip->i_ino, &first_block, &free_list,
+ resblks);
+ if (error)
+ goto abort_return;
+ xfs_ichgtime(tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
+ tdp->i_gen++;
+ xfs_trans_log_inode(tp, tdp, XFS_ILOG_CORE);
+
+ error = xfs_bumplink(tp, sip);
+ if (error) {
+ goto abort_return;
+ }
+
+ /*
+ * If this is a synchronous mount, make sure that the
+ * link transaction goes to disk before returning to
+ * the user.
+ */
+ if (mp->m_flags & XFS_MOUNT_WSYNC) {
+ xfs_trans_set_sync(tp);
+ }
+
+ error = xfs_bmap_finish (&tp, &free_list, first_block, &committed);
+ if (error) {
+ xfs_bmap_cancel(&free_list);
+ goto abort_return;
+ }
+
+ error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
+ if (error) {
+ goto std_return;
+ }
+
+ /* Fall through to std_return with error = 0. */
+std_return:
+ if (DM_EVENT_ENABLED(src_vp->v_vfsp, sip,
+ DM_EVENT_POSTLINK)) {
+ (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTLINK,
+ target_dir_vp, DM_RIGHT_NULL,
+ src_vp, DM_RIGHT_NULL,
+ target_name, NULL, 0, error, 0);
+ }
+ return error;
+
+ abort_return:
+ cancel_flags |= XFS_TRANS_ABORT;
+ /* FALLTHROUGH */
+ error_return:
+ xfs_trans_cancel(tp, cancel_flags);
+
+ goto std_return;
+}
+/*
+ * xfs_mkdir
+ *
+ */
+STATIC int
+xfs_mkdir(
+ bhv_desc_t *dir_bdp,
+ vname_t *dentry,
+ vattr_t *vap,
+ vnode_t **vpp,
+ cred_t *credp)
+{
+ char *dir_name = VNAME(dentry);
+ xfs_inode_t *dp;
+ xfs_inode_t *cdp; /* inode of created dir */
+ vnode_t *cvp; /* vnode of created dir */
+ xfs_trans_t *tp;
+ xfs_mount_t *mp;
+ int cancel_flags;
+ int error;
+ int committed;
+ xfs_bmap_free_t free_list;
+ xfs_fsblock_t first_block;
+ vnode_t *dir_vp;
+ boolean_t dp_joined_to_trans;
+ boolean_t created = B_FALSE;
+ int dm_event_sent = 0;
+ xfs_prid_t prid;
+ struct xfs_dquot *udqp, *gdqp;
+ uint resblks;
+ int dm_di_mode;
+ int dir_namelen;
+
+ dir_vp = BHV_TO_VNODE(dir_bdp);
+ dp = XFS_BHVTOI(dir_bdp);
+ mp = dp->i_mount;
+
+ if (XFS_FORCED_SHUTDOWN(mp))
+ return XFS_ERROR(EIO);
+
+ dir_namelen = VNAMELEN(dentry);
+
+ tp = NULL;
+ dp_joined_to_trans = B_FALSE;
+ dm_di_mode = vap->va_mode|VTTOIF(vap->va_type);
+
+ if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_CREATE)) {
+ error = XFS_SEND_NAMESP(mp, DM_EVENT_CREATE,
+ dir_vp, DM_RIGHT_NULL, NULL,
+ DM_RIGHT_NULL, dir_name, NULL,
+ dm_di_mode, 0, 0);
+ if (error)
+ return error;
+ dm_event_sent = 1;
+ }
+
+ /* Return through std_return after this point. */
+
+ vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address);
+
+ mp = dp->i_mount;
+ udqp = gdqp = NULL;
+ if (vap->va_mask & XFS_AT_PROJID)
+ prid = (xfs_prid_t)vap->va_projid;
+ else
+ prid = (xfs_prid_t)dfltprid;
+
+ /*
+ * Make sure that we have allocated dquot(s) on disk.
+ */
+ error = XFS_QM_DQVOPALLOC(mp, dp,
+ current_fsuid(credp), current_fsgid(credp),
+ XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp);
+ if (error)
+ goto std_return;
+
+ tp = xfs_trans_alloc(mp, XFS_TRANS_MKDIR);
+ cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
+ resblks = XFS_MKDIR_SPACE_RES(mp, dir_namelen);
+ error = xfs_trans_reserve(tp, resblks, XFS_MKDIR_LOG_RES(mp), 0,
+ XFS_TRANS_PERM_LOG_RES, XFS_MKDIR_LOG_COUNT);
+ if (error == ENOSPC) {
+ resblks = 0;
+ error = xfs_trans_reserve(tp, 0, XFS_MKDIR_LOG_RES(mp), 0,
+ XFS_TRANS_PERM_LOG_RES,
+ XFS_MKDIR_LOG_COUNT);
+ }
+ if (error) {
+ cancel_flags = 0;
+ dp = NULL;
+ goto error_return;
+ }
+
+ xfs_ilock(dp, XFS_ILOCK_EXCL);
+
+ /*
+ * Check for directory link count overflow.
+ */
+ if (dp->i_d.di_nlink >= XFS_MAXLINK) {
+ error = XFS_ERROR(EMLINK);
+ goto error_return;
+ }
+
+ /*
+ * Reserve disk quota and the inode.
+ */
+ error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0);
+ if (error)
+ goto error_return;
+
+ if (resblks == 0 &&
+ (error = XFS_DIR_CANENTER(mp, tp, dp, dir_name, dir_namelen)))
+ goto error_return;
+ /*
+ * create the directory inode.
+ */
+ error = xfs_dir_ialloc(&tp, dp,
+ MAKEIMODE(vap->va_type,vap->va_mode), 2,
+ 0, credp, prid, resblks > 0,
+ &cdp, NULL);
+ if (error) {
+ if (error == ENOSPC)
+ goto error_return;
+ goto abort_return;
+ }
+ ITRACE(cdp);
+
+ /*
+ * Now we add the directory inode to the transaction.
+ * We waited until now since xfs_dir_ialloc might start
+ * a new transaction. Had we joined the transaction
+ * earlier, the locks might have gotten released.
+ */
+ VN_HOLD(dir_vp);
+ xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
+ dp_joined_to_trans = B_TRUE;
+
+ XFS_BMAP_INIT(&free_list, &first_block);
+
+ error = XFS_DIR_CREATENAME(mp, tp, dp, dir_name, dir_namelen,
+ cdp->i_ino, &first_block, &free_list,
+ resblks ? resblks - XFS_IALLOC_SPACE_RES(mp) : 0);
+ if (error) {
+ ASSERT(error != ENOSPC);
+ goto error1;
+ }
+ xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
+
+ /*
+ * Bump the in memory version number of the parent directory
+ * so that other processes accessing it will recognize that
+ * the directory has changed.
+ */
+ dp->i_gen++;
+
+ error = XFS_DIR_INIT(mp, tp, cdp, dp);
+ if (error) {
+ goto error2;
+ }
+
+ cdp->i_gen = 1;
+ error = xfs_bumplink(tp, dp);
+ if (error) {
+ goto error2;
+ }
+
+ cvp = XFS_ITOV(cdp);
+
+ created = B_TRUE;
+
+ *vpp = cvp;
+ IHOLD(cdp);
+
+ /*
+ * Attach the dquots to the new inode and modify the icount incore.
+ */
+ XFS_QM_DQVOPCREATE(mp, tp, cdp, udqp, gdqp);
+
+ /*
+ * If this is a synchronous mount, make sure that the
+ * mkdir transaction goes to disk before returning to
+ * the user.
+ */
+ if (mp->m_flags & XFS_MOUNT_WSYNC) {
+ xfs_trans_set_sync(tp);
+ }
+
+ error = xfs_bmap_finish(&tp, &free_list, first_block, &committed);
+ if (error) {
+ IRELE(cdp);
+ goto error2;
+ }
+
+ error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
+ XFS_QM_DQRELE(mp, udqp);
+ XFS_QM_DQRELE(mp, gdqp);
+ if (error) {
+ IRELE(cdp);
+ }
+
+ /* Fall through to std_return with error = 0 or errno from
+ * xfs_trans_commit. */
+
+std_return:
+ if ( (created || (error != 0 && dm_event_sent != 0)) &&
+ DM_EVENT_ENABLED(dir_vp->v_vfsp, XFS_BHVTOI(dir_bdp),
+ DM_EVENT_POSTCREATE)) {
+ (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTCREATE,
+ dir_vp, DM_RIGHT_NULL,
+ created ? XFS_ITOV(cdp):NULL,
+ DM_RIGHT_NULL,
+ dir_name, NULL,
+ dm_di_mode, error, 0);
+ }
+ return error;
+
+ error2:
+ error1:
+ xfs_bmap_cancel(&free_list);
+ abort_return:
+ cancel_flags |= XFS_TRANS_ABORT;
+ error_return:
+ xfs_trans_cancel(tp, cancel_flags);
+ XFS_QM_DQRELE(mp, udqp);
+ XFS_QM_DQRELE(mp, gdqp);
+
+ if (!dp_joined_to_trans && (dp != NULL)) {
+ xfs_iunlock(dp, XFS_ILOCK_EXCL);
+ }
+
+ goto std_return;
+}
+
+
+/*
+ * xfs_rmdir
+ *
+ */
+STATIC int
+xfs_rmdir(
+ bhv_desc_t *dir_bdp,
+ vname_t *dentry,
+ cred_t *credp)
+{
+ char *name = VNAME(dentry);
+ xfs_inode_t *dp;
+ xfs_inode_t *cdp; /* child directory */
+ xfs_trans_t *tp;
+ xfs_mount_t *mp;
+ int error;
+ xfs_bmap_free_t free_list;
+ xfs_fsblock_t first_block;
+ int cancel_flags;
+ int committed;
+ vnode_t *dir_vp;
+ int dm_di_mode = 0;
+ int last_cdp_link;
+ int namelen;
+ uint resblks;
+
+ dir_vp = BHV_TO_VNODE(dir_bdp);
+ dp = XFS_BHVTOI(dir_bdp);
+ mp = dp->i_mount;
+
+ vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address);
+
+ if (XFS_FORCED_SHUTDOWN(XFS_BHVTOI(dir_bdp)->i_mount))
+ return XFS_ERROR(EIO);
+ namelen = VNAMELEN(dentry);
+
+ if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_REMOVE)) {
+ error = XFS_SEND_NAMESP(mp, DM_EVENT_REMOVE,
+ dir_vp, DM_RIGHT_NULL,
+ NULL, DM_RIGHT_NULL,
+ name, NULL, 0, 0, 0);
+ if (error)
+ return XFS_ERROR(error);
+ }
+
+ /* Return through std_return after this point. */
+
+ cdp = NULL;
+
+ /*
+ * We need to get a reference to cdp before we get our log
+ * reservation. The reason for this is that we cannot call
+ * xfs_iget for an inode for which we do not have a reference
+ * once we've acquired a log reservation. This is because the
+ * inode we are trying to get might be in xfs_inactive going
+ * for a log reservation. Since we'll have to wait for the
+ * inactive code to complete before returning from xfs_iget,
+ * we need to make sure that we don't have log space reserved
+ * when we call xfs_iget. Instead we get an unlocked referece
+ * to the inode before getting our log reservation.
+ */
+ error = xfs_get_dir_entry(dentry, &cdp);
+ if (error) {
+ REMOVE_DEBUG_TRACE(__LINE__);
+ goto std_return;
+ }
+ mp = dp->i_mount;
+ dm_di_mode = cdp->i_d.di_mode;
+
+ /*
+ * Get the dquots for the inodes.
+ */
+ error = XFS_QM_DQATTACH(mp, dp, 0);
+ if (!error && dp != cdp)
+ error = XFS_QM_DQATTACH(mp, cdp, 0);
+ if (error) {
+ IRELE(cdp);
+ REMOVE_DEBUG_TRACE(__LINE__);
+ goto std_return;
+ }
+
+ tp = xfs_trans_alloc(mp, XFS_TRANS_RMDIR);
+ cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
+ /*
+ * We try to get the real space reservation first,
+ * allowing for directory btree deletion(s) implying
+ * possible bmap insert(s). If we can't get the space
+ * reservation then we use 0 instead, and avoid the bmap
+ * btree insert(s) in the directory code by, if the bmap
+ * insert tries to happen, instead trimming the LAST
+ * block from the directory.
+ */
+ resblks = XFS_REMOVE_SPACE_RES(mp);
+ error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0,
+ XFS_TRANS_PERM_LOG_RES, XFS_DEFAULT_LOG_COUNT);
+ if (error == ENOSPC) {
+ resblks = 0;
+ error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0,
+ XFS_TRANS_PERM_LOG_RES, XFS_DEFAULT_LOG_COUNT);
+ }
+ if (error) {
+ ASSERT(error != ENOSPC);
+ cancel_flags = 0;
+ IRELE(cdp);
+ goto error_return;
+ }
+ XFS_BMAP_INIT(&free_list, &first_block);
+
+ /*
+ * Now lock the child directory inode and the parent directory
+ * inode in the proper order. This will take care of validating
+ * that the directory entry for the child directory inode has
+ * not changed while we were obtaining a log reservation.
+ */
+ error = xfs_lock_dir_and_entry(dp, dentry, cdp);
+ if (error) {
+ xfs_trans_cancel(tp, cancel_flags);
+ IRELE(cdp);
+ goto std_return;
+ }
+
+ xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
+ if (dp != cdp) {
+ /*
+ * Only increment the parent directory vnode count if
+ * we didn't bump it in looking up cdp. The only time
+ * we don't bump it is when we're looking up ".".
+ */
+ VN_HOLD(dir_vp);
+ }
+
+ ITRACE(cdp);
+ xfs_trans_ijoin(tp, cdp, XFS_ILOCK_EXCL);
+
+ if ((error = _MAC_XFS_IACCESS(cdp, MACWRITE, credp))) {
+ goto error_return;
+ }
+
+ ASSERT(cdp->i_d.di_nlink >= 2);
+ if (cdp->i_d.di_nlink != 2) {
+ error = XFS_ERROR(ENOTEMPTY);
+ goto error_return;
+ }
+ if (!XFS_DIR_ISEMPTY(mp, cdp)) {
+ error = XFS_ERROR(ENOTEMPTY);
+ goto error_return;
+ }
+
+ error = XFS_DIR_REMOVENAME(mp, tp, dp, name, namelen, cdp->i_ino,
+ &first_block, &free_list, resblks);
+ if (error) {
+ goto error1;
+ }
+
+ xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
+
+ /*
+ * Bump the in memory generation count on the parent
+ * directory so that other can know that it has changed.
+ */
+ dp->i_gen++;
+
+ /*
+ * Drop the link from cdp's "..".
+ */
+ error = xfs_droplink(tp, dp);
+ if (error) {
+ goto error1;
+ }
+
+ /*
+ * Drop the link from dp to cdp.
+ */
+ error = xfs_droplink(tp, cdp);
+ if (error) {
+ goto error1;
+ }
+
+ /*
+ * Drop the "." link from cdp to self.
+ */
+ error = xfs_droplink(tp, cdp);
+ if (error) {
+ goto error1;
+ }
+
+ /* Determine these before committing transaction */
+ last_cdp_link = (cdp)->i_d.di_nlink==0;
+
+ /*
+ * Take an extra ref on the child vnode so that it
+ * does not go to xfs_inactive() from within the commit.
+ */
+ IHOLD(cdp);
+
+ /*
+ * If this is a synchronous mount, make sure that the
+ * rmdir transaction goes to disk before returning to
+ * the user.
+ */
+ if (mp->m_flags & XFS_MOUNT_WSYNC) {
+ xfs_trans_set_sync(tp);
+ }
+
+ error = xfs_bmap_finish (&tp, &free_list, first_block, &committed);
+ if (error) {
+ xfs_bmap_cancel(&free_list);
+ xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES |
+ XFS_TRANS_ABORT));
+ IRELE(cdp);
+ goto std_return;
+ }
+
+ error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
+ if (error) {
+ IRELE(cdp);
+ goto std_return;
+ }
+
+
+ /*
+ * Let interposed file systems know about removed links.
+ */
+ VOP_LINK_REMOVED(XFS_ITOV(cdp), dir_vp, last_cdp_link);
+
+ IRELE(cdp);
+
+ /* Fall through to std_return with error = 0 or the errno
+ * from xfs_trans_commit. */
+std_return:
+ if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_POSTREMOVE)) {
+ (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTREMOVE,
+ dir_vp, DM_RIGHT_NULL,
+ NULL, DM_RIGHT_NULL,
+ name, NULL, dm_di_mode,
+ error, 0);
+ }
+ return error;
+
+ error1:
+ xfs_bmap_cancel(&free_list);
+ cancel_flags |= XFS_TRANS_ABORT;
+ error_return:
+ xfs_trans_cancel(tp, cancel_flags);
+ goto std_return;
+}
+
+
+/*
+ * xfs_readdir
+ *
+ * Read dp's entries starting at uiop->uio_offset and translate them into
+ * bufsize bytes worth of struct dirents starting at bufbase.
+ */
+STATIC int
+xfs_readdir(
+ bhv_desc_t *dir_bdp,
+ uio_t *uiop,
+ cred_t *credp,
+ int *eofp)
+{
+ xfs_inode_t *dp;
+ xfs_trans_t *tp = NULL;
+ int error = 0;
+ uint lock_mode;
+ xfs_off_t start_offset;
+
+ vn_trace_entry(BHV_TO_VNODE(dir_bdp), __FUNCTION__,
+ (inst_t *)__return_address);
+ dp = XFS_BHVTOI(dir_bdp);
+
+ if (XFS_FORCED_SHUTDOWN(dp->i_mount)) {
+ return XFS_ERROR(EIO);
+ }
+
+ lock_mode = xfs_ilock_map_shared(dp);
+ start_offset = uiop->uio_offset;
+ error = XFS_DIR_GETDENTS(dp->i_mount, tp, dp, uiop, eofp);
+ if (start_offset != uiop->uio_offset) {
+ xfs_ichgtime(dp, XFS_ICHGTIME_ACC);
+ }
+ xfs_iunlock_map_shared(dp, lock_mode);
+ return error;
+}
+
+
+/*
+ * xfs_symlink
+ *
+ */
+STATIC int
+xfs_symlink(
+ bhv_desc_t *dir_bdp,
+ vname_t *dentry,
+ vattr_t *vap,
+ char *target_path,
+ vnode_t **vpp,
+ cred_t *credp)
+{
+ xfs_trans_t *tp;
+ xfs_mount_t *mp;
+ xfs_inode_t *dp;
+ xfs_inode_t *ip;
+ int error;
+ int pathlen;
+ xfs_bmap_free_t free_list;
+ xfs_fsblock_t first_block;
+ boolean_t dp_joined_to_trans;
+ vnode_t *dir_vp;
+ uint cancel_flags;
+ int committed;
+ xfs_fileoff_t first_fsb;
+ xfs_filblks_t fs_blocks;
+ int nmaps;
+ xfs_bmbt_irec_t mval[SYMLINK_MAPS];
+ xfs_daddr_t d;
+ char *cur_chunk;
+ int byte_cnt;
+ int n;
+ xfs_buf_t *bp;
+ xfs_prid_t prid;
+ struct xfs_dquot *udqp, *gdqp;
+ uint resblks;
+ char *link_name = VNAME(dentry);
+ int link_namelen;
+
+ *vpp = NULL;
+ dir_vp = BHV_TO_VNODE(dir_bdp);
+ dp = XFS_BHVTOI(dir_bdp);
+ dp_joined_to_trans = B_FALSE;
+ error = 0;
+ ip = NULL;
+ tp = NULL;
+
+ vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address);
+
+ mp = dp->i_mount;
+
+ if (XFS_FORCED_SHUTDOWN(mp))
+ return XFS_ERROR(EIO);
+
+ link_namelen = VNAMELEN(dentry);
+
+ /*
+ * Check component lengths of the target path name.
+ */
+ pathlen = strlen(target_path);
+ if (pathlen >= MAXPATHLEN) /* total string too long */
+ return XFS_ERROR(ENAMETOOLONG);
+ if (pathlen >= MAXNAMELEN) { /* is any component too long? */
+ int len, total;
+ char *path;
+
+ for(total = 0, path = target_path; total < pathlen;) {
+ /*
+ * Skip any slashes.
+ */
+ while(*path == '/') {
+ total++;
+ path++;
+ }
+
+ /*
+ * Count up to the next slash or end of path.
+ * Error out if the component is bigger than MAXNAMELEN.
+ */
+ for(len = 0; *path != '/' && total < pathlen;total++, path++) {
+ if (++len >= MAXNAMELEN) {
+ error = ENAMETOOLONG;
+ return error;
+ }
+ }
+ }
+ }
+
+ if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_SYMLINK)) {
+ error = XFS_SEND_NAMESP(mp, DM_EVENT_SYMLINK, dir_vp,
+ DM_RIGHT_NULL, NULL, DM_RIGHT_NULL,
+ link_name, target_path, 0, 0, 0);
+ if (error)
+ return error;
+ }
+
+ /* Return through std_return after this point. */
+
+ udqp = gdqp = NULL;
+ if (vap->va_mask & XFS_AT_PROJID)
+ prid = (xfs_prid_t)vap->va_projid;
+ else
+ prid = (xfs_prid_t)dfltprid;
+
+ /*
+ * Make sure that we have allocated dquot(s) on disk.
+ */
+ error = XFS_QM_DQVOPALLOC(mp, dp,
+ current_fsuid(credp), current_fsgid(credp),
+ XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp);
+ if (error)
+ goto std_return;
+
+ tp = xfs_trans_alloc(mp, XFS_TRANS_SYMLINK);
+ cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
+ /*
+ * The symlink will fit into the inode data fork?
+ * There can't be any attributes so we get the whole variable part.
+ */
+ if (pathlen <= XFS_LITINO(mp))
+ fs_blocks = 0;
+ else
+ fs_blocks = XFS_B_TO_FSB(mp, pathlen);
+ resblks = XFS_SYMLINK_SPACE_RES(mp, link_namelen, fs_blocks);
+ error = xfs_trans_reserve(tp, resblks, XFS_SYMLINK_LOG_RES(mp), 0,
+ XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT);
+ if (error == ENOSPC && fs_blocks == 0) {
+ resblks = 0;
+ error = xfs_trans_reserve(tp, 0, XFS_SYMLINK_LOG_RES(mp), 0,
+ XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT);
+ }
+ if (error) {
+ cancel_flags = 0;
+ dp = NULL;
+ goto error_return;
+ }
+
+ xfs_ilock(dp, XFS_ILOCK_EXCL);
+
+ /*
+ * Reserve disk quota : blocks and inode.
+ */
+ error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0);
+ if (error)
+ goto error_return;
+
+ /*
+ * Check for ability to enter directory entry, if no space reserved.
+ */
+ if (resblks == 0 &&
+ (error = XFS_DIR_CANENTER(mp, tp, dp, link_name, link_namelen)))
+ goto error_return;
+ /*
+ * Initialize the bmap freelist prior to calling either
+ * bmapi or the directory create code.
+ */
+ XFS_BMAP_INIT(&free_list, &first_block);
+
+ /*
+ * Allocate an inode for the symlink.
+ */
+ error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (vap->va_mode&~S_IFMT),
+ 1, 0, credp, prid, resblks > 0, &ip, NULL);
+ if (error) {
+ if (error == ENOSPC)
+ goto error_return;
+ goto error1;
+ }
+ ITRACE(ip);
+
+ VN_HOLD(dir_vp);
+ xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
+ dp_joined_to_trans = B_TRUE;
+
+ /*
+ * Also attach the dquot(s) to it, if applicable.
+ */
+ XFS_QM_DQVOPCREATE(mp, tp, ip, udqp, gdqp);
+
+ if (resblks)
+ resblks -= XFS_IALLOC_SPACE_RES(mp);
+ /*
+ * If the symlink will fit into the inode, write it inline.
+ */
+ if (pathlen <= XFS_IFORK_DSIZE(ip)) {
+ xfs_idata_realloc(ip, pathlen, XFS_DATA_FORK);
+ memcpy(ip->i_df.if_u1.if_data, target_path, pathlen);
+ ip->i_d.di_size = pathlen;
+
+ /*
+ * The inode was initially created in extent format.
+ */
+ ip->i_df.if_flags &= ~(XFS_IFEXTENTS | XFS_IFBROOT);
+ ip->i_df.if_flags |= XFS_IFINLINE;
+
+ ip->i_d.di_format = XFS_DINODE_FMT_LOCAL;
+ xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE);
+
+ } else {
+ first_fsb = 0;
+ nmaps = SYMLINK_MAPS;
+
+ error = xfs_bmapi(tp, ip, first_fsb, fs_blocks,
+ XFS_BMAPI_WRITE | XFS_BMAPI_METADATA,
+ &first_block, resblks, mval, &nmaps,
+ &free_list);
+ if (error) {
+ goto error1;
+ }
+
+ if (resblks)
+ resblks -= fs_blocks;
+ ip->i_d.di_size = pathlen;
+ xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
+
+ cur_chunk = target_path;
+ for (n = 0; n < nmaps; n++) {
+ d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock);
+ byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount);
+ bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d,
+ BTOBB(byte_cnt), 0);
+ ASSERT(bp && !XFS_BUF_GETERROR(bp));
+ if (pathlen < byte_cnt) {
+ byte_cnt = pathlen;
+ }
+ pathlen -= byte_cnt;
+
+ memcpy(XFS_BUF_PTR(bp), cur_chunk, byte_cnt);
+ cur_chunk += byte_cnt;
+
+ xfs_trans_log_buf(tp, bp, 0, byte_cnt - 1);
+ }
+ }
+
+ /*
+ * Create the directory entry for the symlink.
+ */
+ error = XFS_DIR_CREATENAME(mp, tp, dp, link_name, link_namelen,
+ ip->i_ino, &first_block, &free_list, resblks);
+ if (error) {
+ goto error1;
+ }
+ xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
+ xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
+
+ /*
+ * Bump the in memory version number of the parent directory
+ * so that other processes accessing it will recognize that
+ * the directory has changed.
+ */
+ dp->i_gen++;
+
+ /*
+ * If this is a synchronous mount, make sure that the
+ * symlink transaction goes to disk before returning to
+ * the user.
+ */
+ if (mp->m_flags & XFS_MOUNT_WSYNC) {
+ xfs_trans_set_sync(tp);
+ }
+
+ /*
+ * xfs_trans_commit normally decrements the vnode ref count
+ * when it unlocks the inode. Since we want to return the
+ * vnode to the caller, we bump the vnode ref count now.
+ */
+ IHOLD(ip);
+
+ error = xfs_bmap_finish(&tp, &free_list, first_block, &committed);
+ if (error) {
+ goto error2;
+ }
+ error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
+ XFS_QM_DQRELE(mp, udqp);
+ XFS_QM_DQRELE(mp, gdqp);
+
+ /* Fall through to std_return with error = 0 or errno from
+ * xfs_trans_commit */
+std_return:
+ if (DM_EVENT_ENABLED(dir_vp->v_vfsp, XFS_BHVTOI(dir_bdp),
+ DM_EVENT_POSTSYMLINK)) {
+ (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTSYMLINK,
+ dir_vp, DM_RIGHT_NULL,
+ error ? NULL : XFS_ITOV(ip),
+ DM_RIGHT_NULL, link_name, target_path,
+ 0, error, 0);
+ }
+
+ if (!error) {
+ vnode_t *vp;
+
+ ASSERT(ip);
+ vp = XFS_ITOV(ip);
+ *vpp = vp;
+ }
+ return error;
+
+ error2:
+ IRELE(ip);
+ error1:
+ xfs_bmap_cancel(&free_list);
+ cancel_flags |= XFS_TRANS_ABORT;
+ error_return:
+ xfs_trans_cancel(tp, cancel_flags);
+ XFS_QM_DQRELE(mp, udqp);
+ XFS_QM_DQRELE(mp, gdqp);
+
+ if (!dp_joined_to_trans && (dp != NULL)) {
+ xfs_iunlock(dp, XFS_ILOCK_EXCL);
+ }
+
+ goto std_return;
+}
+
+
+/*
+ * xfs_fid2
+ *
+ * A fid routine that takes a pointer to a previously allocated
+ * fid structure (like xfs_fast_fid) but uses a 64 bit inode number.
+ */
+STATIC int
+xfs_fid2(
+ bhv_desc_t *bdp,
+ fid_t *fidp)
+{
+ xfs_inode_t *ip;
+ xfs_fid2_t *xfid;
+
+ vn_trace_entry(BHV_TO_VNODE(bdp), __FUNCTION__,
+ (inst_t *)__return_address);
+ ASSERT(sizeof(fid_t) >= sizeof(xfs_fid2_t));
+
+ xfid = (xfs_fid2_t *)fidp;
+ ip = XFS_BHVTOI(bdp);
+ xfid->fid_len = sizeof(xfs_fid2_t) - sizeof(xfid->fid_len);
+ xfid->fid_pad = 0;
+ /*
+ * use memcpy because the inode is a long long and there's no
+ * assurance that xfid->fid_ino is properly aligned.
+ */
+ memcpy(&xfid->fid_ino, &ip->i_ino, sizeof(xfid->fid_ino));
+ xfid->fid_gen = ip->i_d.di_gen;
+
+ return 0;
+}
+
+
+/*
+ * xfs_rwlock
+ */
+int
+xfs_rwlock(
+ bhv_desc_t *bdp,
+ vrwlock_t locktype)
+{
+ xfs_inode_t *ip;
+ vnode_t *vp;
+
+ vp = BHV_TO_VNODE(bdp);
+ if (vp->v_type == VDIR)
+ return 1;
+ ip = XFS_BHVTOI(bdp);
+ if (locktype == VRWLOCK_WRITE) {
+ xfs_ilock(ip, XFS_IOLOCK_EXCL);
+ } else if (locktype == VRWLOCK_TRY_READ) {
+ return (xfs_ilock_nowait(ip, XFS_IOLOCK_SHARED));
+ } else if (locktype == VRWLOCK_TRY_WRITE) {
+ return (xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL));
+ } else {
+ ASSERT((locktype == VRWLOCK_READ) ||
+ (locktype == VRWLOCK_WRITE_DIRECT));
+ xfs_ilock(ip, XFS_IOLOCK_SHARED);
+ }
+
+ return 1;
+}
+
+
+/*
+ * xfs_rwunlock
+ */
+void
+xfs_rwunlock(
+ bhv_desc_t *bdp,
+ vrwlock_t locktype)
+{
+ xfs_inode_t *ip;
+ vnode_t *vp;
+
+ vp = BHV_TO_VNODE(bdp);
+ if (vp->v_type == VDIR)
+ return;
+ ip = XFS_BHVTOI(bdp);
+ if (locktype == VRWLOCK_WRITE) {
+ /*
+ * In the write case, we may have added a new entry to
+ * the reference cache. This might store a pointer to
+ * an inode to be released in this inode. If it is there,
+ * clear the pointer and release the inode after unlocking
+ * this one.
+ */
+ xfs_refcache_iunlock(ip, XFS_IOLOCK_EXCL);
+ } else {
+ ASSERT((locktype == VRWLOCK_READ) ||
+ (locktype == VRWLOCK_WRITE_DIRECT));
+ xfs_iunlock(ip, XFS_IOLOCK_SHARED);
+ }
+ return;
+}
+
+STATIC int
+xfs_inode_flush(
+ bhv_desc_t *bdp,
+ int flags)
+{
+ xfs_inode_t *ip;
+ xfs_mount_t *mp;
+ int error = 0;
+
+ ip = XFS_BHVTOI(bdp);
+ mp = ip->i_mount;
+
+ if (XFS_FORCED_SHUTDOWN(mp))
+ return XFS_ERROR(EIO);
+
+ /* Bypass inodes which have already been cleaned by
+ * the inode flush clustering code inside xfs_iflush
+ */
+ if ((ip->i_update_core == 0) &&
+ ((ip->i_itemp == NULL) ||
+ !(ip->i_itemp->ili_format.ilf_fields & XFS_ILOG_ALL)))
+ return 0;
+
+ if (flags & FLUSH_LOG) {
+ xfs_inode_log_item_t *iip = ip->i_itemp;
+
+ if (iip && iip->ili_last_lsn) {
+ xlog_t *log = mp->m_log;
+ xfs_lsn_t sync_lsn;
+ int s, log_flags = XFS_LOG_FORCE;
+
+ s = GRANT_LOCK(log);
+ sync_lsn = log->l_last_sync_lsn;
+ GRANT_UNLOCK(log, s);
+
+ if ((XFS_LSN_CMP(iip->ili_last_lsn, sync_lsn) <= 0))
+ return 0;
+
+ if (flags & FLUSH_SYNC)
+ log_flags |= XFS_LOG_SYNC;
+ return xfs_log_force(mp, iip->ili_last_lsn,
+ log_flags);
+ }
+ }
+
+ /* We make this non-blocking if the inode is contended,
+ * return EAGAIN to indicate to the caller that they
+ * did not succeed. This prevents the flush path from
+ * blocking on inodes inside another operation right
+ * now, they get caught later by xfs_sync.
+ */
+ if (flags & FLUSH_INODE) {
+ int flush_flags;
+
+ if (xfs_ipincount(ip))
+ return EAGAIN;
+
+ if (flags & FLUSH_SYNC) {
+ xfs_ilock(ip, XFS_ILOCK_SHARED);
+ xfs_iflock(ip);
+ } else if (xfs_ilock_nowait(ip, XFS_ILOCK_SHARED)) {
+ if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip)) {
+ xfs_iunlock(ip, XFS_ILOCK_SHARED);
+ return EAGAIN;
+ }
+ } else {
+ return EAGAIN;
+ }
+
+ if (flags & FLUSH_SYNC)
+ flush_flags = XFS_IFLUSH_SYNC;
+ else
+ flush_flags = XFS_IFLUSH_ASYNC;
+
+ error = xfs_iflush(ip, flush_flags);
+ xfs_iunlock(ip, XFS_ILOCK_SHARED);
+ }
+
+ return error;
+}
+
+
+int
+xfs_set_dmattrs (
+ bhv_desc_t *bdp,
+ u_int evmask,
+ u_int16_t state,
+ cred_t *credp)
+{
+ xfs_inode_t *ip;
+ xfs_trans_t *tp;
+ xfs_mount_t *mp;
+ int error;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return XFS_ERROR(EPERM);
+
+ ip = XFS_BHVTOI(bdp);
+ mp = ip->i_mount;
+
+ if (XFS_FORCED_SHUTDOWN(mp))
+ return XFS_ERROR(EIO);
+
+ tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS);
+ error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES (mp), 0, 0, 0);
+ if (error) {
+ xfs_trans_cancel(tp, 0);
+ return error;
+ }
+ xfs_ilock(ip, XFS_ILOCK_EXCL);
+ xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
+
+ ip->i_iocore.io_dmevmask = ip->i_d.di_dmevmask = evmask;
+ ip->i_iocore.io_dmstate = ip->i_d.di_dmstate = state;
+
+ xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
+ IHOLD(ip);
+ error = xfs_trans_commit(tp, 0, NULL);
+
+ return error;
+}
+
+
+/*
+ * xfs_reclaim
+ */
+STATIC int
+xfs_reclaim(
+ bhv_desc_t *bdp)
+{
+ xfs_inode_t *ip;
+ vnode_t *vp;
+
+ vp = BHV_TO_VNODE(bdp);
+
+ vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
+
+ ASSERT(!VN_MAPPED(vp));
+ ip = XFS_BHVTOI(bdp);
+
+ if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) {
+ if (ip->i_d.di_size > 0) {
+ /*
+ * Flush and invalidate any data left around that is
+ * a part of this file.
+ *
+ * Get the inode's i/o lock so that buffers are pushed
+ * out while holding the proper lock. We can't hold
+ * the inode lock here since flushing out buffers may
+ * cause us to try to get the lock in xfs_strategy().
+ *
+ * We don't have to call remapf() here, because there
+ * cannot be any mapped file references to this vnode
+ * since it is being reclaimed.
+ */
+ xfs_ilock(ip, XFS_IOLOCK_EXCL);
+
+ /*
+ * If we hit an IO error, we need to make sure that the
+ * buffer and page caches of file data for
+ * the file are tossed away. We don't want to use
+ * VOP_FLUSHINVAL_PAGES here because we don't want dirty
+ * pages to stay attached to the vnode, but be
+ * marked P_BAD. pdflush/vnode_pagebad
+ * hates that.
+ */
+ if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) {
+ VOP_FLUSHINVAL_PAGES(vp, 0, -1, FI_NONE);
+ } else {
+ VOP_TOSS_PAGES(vp, 0, -1, FI_NONE);
+ }
+
+ ASSERT(VN_CACHED(vp) == 0);
+ ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) ||
+ ip->i_delayed_blks == 0);
+ xfs_iunlock(ip, XFS_IOLOCK_EXCL);
+ } else if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
+ /*
+ * di_size field may not be quite accurate if we're
+ * shutting down.
+ */
+ VOP_TOSS_PAGES(vp, 0, -1, FI_NONE);
+ ASSERT(VN_CACHED(vp) == 0);
+ }
+ }
+
+ /* If we have nothing to flush with this inode then complete the
+ * teardown now, otherwise break the link between the xfs inode
+ * and the linux inode and clean up the xfs inode later. This
+ * avoids flushing the inode to disk during the delete operation
+ * itself.
+ */
+ if (!ip->i_update_core && (ip->i_itemp == NULL)) {
+ xfs_ilock(ip, XFS_ILOCK_EXCL);
+ xfs_iflock(ip);
+ return xfs_finish_reclaim(ip, 1, XFS_IFLUSH_DELWRI_ELSE_SYNC);
+ } else {
+ xfs_mount_t *mp = ip->i_mount;
+
+ /* Protect sync from us */
+ XFS_MOUNT_ILOCK(mp);
+ vn_bhv_remove(VN_BHV_HEAD(vp), XFS_ITOBHV(ip));
+ list_add_tail(&ip->i_reclaim, &mp->m_del_inodes);
+ ip->i_flags |= XFS_IRECLAIMABLE;
+ XFS_MOUNT_IUNLOCK(mp);
+ }
+ return 0;
+}
+
+int
+xfs_finish_reclaim(
+ xfs_inode_t *ip,
+ int locked,
+ int sync_mode)
+{
+ xfs_ihash_t *ih = ip->i_hash;
+ int error;
+
+ /* The hash lock here protects a thread in xfs_iget_core from
+ * racing with us on linking the inode back with a vnode.
+ * Once we have the XFS_IRECLAIM flag set it will not touch
+ * us.
+ */
+ write_lock(&ih->ih_lock);
+ if ((ip->i_flags & XFS_IRECLAIM) ||
+ (!(ip->i_flags & XFS_IRECLAIMABLE) &&
+ (XFS_ITOV_NULL(ip) == NULL))) {
+ write_unlock(&ih->ih_lock);
+ if (locked) {
+ xfs_ifunlock(ip);
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
+ }
+ return(1);
+ }
+ ip->i_flags |= XFS_IRECLAIM;
+ write_unlock(&ih->ih_lock);
+
+ /*
+ * If the inode is still dirty, then flush it out. If the inode
+ * is not in the AIL, then it will be OK to flush it delwri as
+ * long as xfs_iflush() does not keep any references to the inode.
+ * We leave that decision up to xfs_iflush() since it has the
+ * knowledge of whether it's OK to simply do a delwri flush of
+ * the inode or whether we need to wait until the inode is
+ * pulled from the AIL.
+ * We get the flush lock regardless, though, just to make sure
+ * we don't free it while it is being flushed.
+ */
+ if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) {
+ if (!locked) {
+ xfs_ilock(ip, XFS_ILOCK_EXCL);
+ xfs_iflock(ip);
+ }
+
+ if (ip->i_update_core ||
+ ((ip->i_itemp != NULL) &&
+ (ip->i_itemp->ili_format.ilf_fields != 0))) {
+ error = xfs_iflush(ip, sync_mode);
+ /*
+ * If we hit an error, typically because of filesystem
+ * shutdown, we don't need to let vn_reclaim to know
+ * because we're gonna reclaim the inode anyway.
+ */
+ if (error) {
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
+ xfs_ireclaim(ip);
+ return (0);
+ }
+ xfs_iflock(ip); /* synchronize with xfs_iflush_done */
+ }
+
+ ASSERT(ip->i_update_core == 0);
+ ASSERT(ip->i_itemp == NULL ||
+ ip->i_itemp->ili_format.ilf_fields == 0);
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
+ } else if (locked) {
+ /*
+ * We are not interested in doing an iflush if we're
+ * in the process of shutting down the filesystem forcibly.
+ * So, just reclaim the inode.
+ */
+ xfs_ifunlock(ip);
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
+ }
+
+ xfs_ireclaim(ip);
+ return 0;
+}
+
+int
+xfs_finish_reclaim_all(xfs_mount_t *mp, int noblock)
+{
+ int purged;
+ struct list_head *curr, *next;
+ xfs_inode_t *ip;
+ int done = 0;
+
+ while (!done) {
+ purged = 0;
+ XFS_MOUNT_ILOCK(mp);
+ list_for_each_safe(curr, next, &mp->m_del_inodes) {
+ ip = list_entry(curr, xfs_inode_t, i_reclaim);
+ if (noblock) {
+ if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0)
+ continue;
+ if (xfs_ipincount(ip) ||
+ !xfs_iflock_nowait(ip)) {
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
+ continue;
+ }
+ }
+ XFS_MOUNT_IUNLOCK(mp);
+ xfs_finish_reclaim(ip, noblock,
+ XFS_IFLUSH_DELWRI_ELSE_ASYNC);
+ purged = 1;
+ break;
+ }
+
+ done = !purged;
+ }
+
+ XFS_MOUNT_IUNLOCK(mp);
+ return 0;
+}
+
+/*
+ * xfs_alloc_file_space()
+ * This routine allocates disk space for the given file.
+ *
+ * If alloc_type == 0, this request is for an ALLOCSP type
+ * request which will change the file size. In this case, no
+ * DMAPI event will be generated by the call. A TRUNCATE event
+ * will be generated later by xfs_setattr.
+ *
+ * If alloc_type != 0, this request is for a RESVSP type
+ * request, and a DMAPI DM_EVENT_WRITE will be generated if the
+ * lower block boundary byte address is less than the file's
+ * length.
+ *
+ * RETURNS:
+ * 0 on success
+ * errno on error
+ *
+ */
+int
+xfs_alloc_file_space(
+ xfs_inode_t *ip,
+ xfs_off_t offset,
+ xfs_off_t len,
+ int alloc_type,
+ int attr_flags)
+{
+ xfs_filblks_t allocated_fsb;
+ xfs_filblks_t allocatesize_fsb;
+ int committed;
+ xfs_off_t count;
+ xfs_filblks_t datablocks;
+ int error;
+ xfs_fsblock_t firstfsb;
+ xfs_bmap_free_t free_list;
+ xfs_bmbt_irec_t *imapp;
+ xfs_bmbt_irec_t imaps[1];
+ xfs_mount_t *mp;
+ int numrtextents;
+ int reccount;
+ uint resblks;
+ int rt;
+ int rtextsize;
+ xfs_fileoff_t startoffset_fsb;
+ xfs_trans_t *tp;
+ int xfs_bmapi_flags;
+
+ vn_trace_entry(XFS_ITOV(ip), __FUNCTION__, (inst_t *)__return_address);
+ mp = ip->i_mount;
+
+ if (XFS_FORCED_SHUTDOWN(mp))
+ return XFS_ERROR(EIO);
+
+ /*
+ * determine if this is a realtime file
+ */
+ if ((rt = XFS_IS_REALTIME_INODE(ip)) != 0) {
+ if (ip->i_d.di_extsize)
+ rtextsize = ip->i_d.di_extsize;
+ else
+ rtextsize = mp->m_sb.sb_rextsize;
+ } else
+ rtextsize = 0;
+
+ if ((error = XFS_QM_DQATTACH(mp, ip, 0)))
+ return error;
+
+ if (len <= 0)
+ return XFS_ERROR(EINVAL);
+
+ count = len;
+ error = 0;
+ imapp = &imaps[0];
+ reccount = 1;
+ xfs_bmapi_flags = XFS_BMAPI_WRITE | (alloc_type ? XFS_BMAPI_PREALLOC : 0);
+ startoffset_fsb = XFS_B_TO_FSBT(mp, offset);
+ allocatesize_fsb = XFS_B_TO_FSB(mp, count);
+
+ /* Generate a DMAPI event if needed. */
+ if (alloc_type != 0 && offset < ip->i_d.di_size &&
+ (attr_flags&ATTR_DMI) == 0 &&
+ DM_EVENT_ENABLED(XFS_MTOVFS(mp), ip, DM_EVENT_WRITE)) {
+ xfs_off_t end_dmi_offset;
+
+ end_dmi_offset = offset+len;
+ if (end_dmi_offset > ip->i_d.di_size)
+ end_dmi_offset = ip->i_d.di_size;
+ error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, XFS_ITOV(ip),
+ offset, end_dmi_offset - offset,
+ 0, NULL);
+ if (error)
+ return(error);
+ }
+
+ /*
+ * allocate file space until done or until there is an error
+ */
+retry:
+ while (allocatesize_fsb && !error) {
+ /*
+ * determine if reserving space on
+ * the data or realtime partition.
+ */
+ if (rt) {
+ xfs_fileoff_t s, e;
+
+ s = startoffset_fsb;
+ do_div(s, rtextsize);
+ s *= rtextsize;
+ e = roundup_64(startoffset_fsb + allocatesize_fsb,
+ rtextsize);
+ numrtextents = (int)(e - s) / mp->m_sb.sb_rextsize;
+ datablocks = 0;
+ } else {
+ datablocks = allocatesize_fsb;
+ numrtextents = 0;
+ }
+
+ /*
+ * allocate and setup the transaction
+ */
+ tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT);
+ resblks = XFS_DIOSTRAT_SPACE_RES(mp, datablocks);
+ error = xfs_trans_reserve(tp,
+ resblks,
+ XFS_WRITE_LOG_RES(mp),
+ numrtextents,
+ XFS_TRANS_PERM_LOG_RES,
+ XFS_WRITE_LOG_COUNT);
+
+ /*
+ * check for running out of space
+ */
+ if (error) {
+ /*
+ * Free the transaction structure.
+ */
+ ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp));
+ xfs_trans_cancel(tp, 0);
+ break;
+ }
+ xfs_ilock(ip, XFS_ILOCK_EXCL);
+ error = XFS_TRANS_RESERVE_QUOTA_BYDQUOTS(mp, tp,
+ ip->i_udquot, ip->i_gdquot, resblks, 0, rt ?
+ XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS);
+ if (error)
+ goto error1;
+
+ xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
+ xfs_trans_ihold(tp, ip);
+
+ /*
+ * issue the bmapi() call to allocate the blocks
+ */
+ XFS_BMAP_INIT(&free_list, &firstfsb);
+ error = xfs_bmapi(tp, ip, startoffset_fsb,
+ allocatesize_fsb, xfs_bmapi_flags,
+ &firstfsb, 0, imapp, &reccount,
+ &free_list);
+ if (error) {
+ goto error0;
+ }
+
+ /*
+ * complete the transaction
+ */
+ error = xfs_bmap_finish(&tp, &free_list, firstfsb, &committed);
+ if (error) {
+ goto error0;
+ }
+
+ error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
+ if (error) {
+ break;
+ }
+
+ allocated_fsb = imapp->br_blockcount;
+
+ if (reccount == 0) {
+ error = XFS_ERROR(ENOSPC);
+ break;
+ }
+
+ startoffset_fsb += allocated_fsb;
+ allocatesize_fsb -= allocated_fsb;
+ }
+dmapi_enospc_check:
+ if (error == ENOSPC && (attr_flags&ATTR_DMI) == 0 &&
+ DM_EVENT_ENABLED(XFS_MTOVFS(mp), ip, DM_EVENT_NOSPACE)) {
+
+ error = XFS_SEND_NAMESP(mp, DM_EVENT_NOSPACE,
+ XFS_ITOV(ip), DM_RIGHT_NULL,
+ XFS_ITOV(ip), DM_RIGHT_NULL,
+ NULL, NULL, 0, 0, 0); /* Delay flag intentionally unused */
+ if (error == 0)
+ goto retry; /* Maybe DMAPI app. has made space */
+ /* else fall through with error from XFS_SEND_DATA */
+ }
+
+ return error;
+
+ error0:
+ xfs_bmap_cancel(&free_list);
+ error1:
+ xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
+ goto dmapi_enospc_check;
+}
+
+/*
+ * Zero file bytes between startoff and endoff inclusive.
+ * The iolock is held exclusive and no blocks are buffered.
+ */
+STATIC int
+xfs_zero_remaining_bytes(
+ xfs_inode_t *ip,
+ xfs_off_t startoff,
+ xfs_off_t endoff)
+{
+ xfs_bmbt_irec_t imap;
+ xfs_fileoff_t offset_fsb;
+ xfs_off_t lastoffset;
+ xfs_off_t offset;
+ xfs_buf_t *bp;
+ xfs_mount_t *mp = ip->i_mount;
+ int nimap;
+ int error = 0;
+
+ bp = xfs_buf_get_noaddr(mp->m_sb.sb_blocksize,
+ ip->i_d.di_flags & XFS_DIFLAG_REALTIME ?
+ mp->m_rtdev_targp : mp->m_ddev_targp);
+
+ for (offset = startoff; offset <= endoff; offset = lastoffset + 1) {
+ offset_fsb = XFS_B_TO_FSBT(mp, offset);
+ nimap = 1;
+ error = xfs_bmapi(NULL, ip, offset_fsb, 1, 0, NULL, 0, &imap,
+ &nimap, NULL);
+ if (error || nimap < 1)
+ break;
+ ASSERT(imap.br_blockcount >= 1);
+ ASSERT(imap.br_startoff == offset_fsb);
+ lastoffset = XFS_FSB_TO_B(mp, imap.br_startoff + 1) - 1;
+ if (lastoffset > endoff)
+ lastoffset = endoff;
+ if (imap.br_startblock == HOLESTARTBLOCK)
+ continue;
+ ASSERT(imap.br_startblock != DELAYSTARTBLOCK);
+ if (imap.br_state == XFS_EXT_UNWRITTEN)
+ continue;
+ XFS_BUF_UNDONE(bp);
+ XFS_BUF_UNWRITE(bp);
+ XFS_BUF_READ(bp);
+ XFS_BUF_SET_ADDR(bp, XFS_FSB_TO_DB(ip, imap.br_startblock));
+ xfsbdstrat(mp, bp);
+ if ((error = xfs_iowait(bp))) {
+ xfs_ioerror_alert("xfs_zero_remaining_bytes(read)",
+ mp, bp, XFS_BUF_ADDR(bp));
+ break;
+ }
+ memset(XFS_BUF_PTR(bp) +
+ (offset - XFS_FSB_TO_B(mp, imap.br_startoff)),
+ 0, lastoffset - offset + 1);
+ XFS_BUF_UNDONE(bp);
+ XFS_BUF_UNREAD(bp);
+ XFS_BUF_WRITE(bp);
+ xfsbdstrat(mp, bp);
+ if ((error = xfs_iowait(bp))) {
+ xfs_ioerror_alert("xfs_zero_remaining_bytes(write)",
+ mp, bp, XFS_BUF_ADDR(bp));
+ break;
+ }
+ }
+ xfs_buf_free(bp);
+ return error;
+}
+
+/*
+ * xfs_free_file_space()
+ * This routine frees disk space for the given file.
+ *
+ * This routine is only called by xfs_change_file_space
+ * for an UNRESVSP type call.
+ *
+ * RETURNS:
+ * 0 on success
+ * errno on error
+ *
+ */
+STATIC int
+xfs_free_file_space(
+ xfs_inode_t *ip,
+ xfs_off_t offset,
+ xfs_off_t len,
+ int attr_flags)
+{
+ int committed;
+ int done;
+ xfs_off_t end_dmi_offset;
+ xfs_fileoff_t endoffset_fsb;
+ int error;
+ xfs_fsblock_t firstfsb;
+ xfs_bmap_free_t free_list;
+ xfs_off_t ilen;
+ xfs_bmbt_irec_t imap;
+ xfs_off_t ioffset;
+ xfs_extlen_t mod=0;
+ xfs_mount_t *mp;
+ int nimap;
+ uint resblks;
+ int rounding;
+ int rt;
+ xfs_fileoff_t startoffset_fsb;
+ xfs_trans_t *tp;
+
+ vn_trace_entry(XFS_ITOV(ip), __FUNCTION__, (inst_t *)__return_address);
+ mp = ip->i_mount;
+
+ if ((error = XFS_QM_DQATTACH(mp, ip, 0)))
+ return error;
+
+ error = 0;
+ if (len <= 0) /* if nothing being freed */
+ return error;
+ rt = (ip->i_d.di_flags & XFS_DIFLAG_REALTIME);
+ startoffset_fsb = XFS_B_TO_FSB(mp, offset);
+ end_dmi_offset = offset + len;
+ endoffset_fsb = XFS_B_TO_FSBT(mp, end_dmi_offset);
+
+ if (offset < ip->i_d.di_size &&
+ (attr_flags & ATTR_DMI) == 0 &&
+ DM_EVENT_ENABLED(XFS_MTOVFS(mp), ip, DM_EVENT_WRITE)) {
+ if (end_dmi_offset > ip->i_d.di_size)
+ end_dmi_offset = ip->i_d.di_size;
+ error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, XFS_ITOV(ip),
+ offset, end_dmi_offset - offset,
+ AT_DELAY_FLAG(attr_flags), NULL);
+ if (error)
+ return(error);
+ }
+
+ xfs_ilock(ip, XFS_IOLOCK_EXCL);
+ rounding = MAX((__uint8_t)(1 << mp->m_sb.sb_blocklog),
+ (__uint8_t)NBPP);
+ ilen = len + (offset & (rounding - 1));
+ ioffset = offset & ~(rounding - 1);
+ if (ilen & (rounding - 1))
+ ilen = (ilen + rounding) & ~(rounding - 1);
+ xfs_inval_cached_pages(XFS_ITOV(ip), &(ip->i_iocore), ioffset, 0, 0);
+ /*
+ * Need to zero the stuff we're not freeing, on disk.
+ * If its a realtime file & can't use unwritten extents then we
+ * actually need to zero the extent edges. Otherwise xfs_bunmapi
+ * will take care of it for us.
+ */
+ if (rt && !XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb)) {
+ nimap = 1;
+ error = xfs_bmapi(NULL, ip, startoffset_fsb, 1, 0, NULL, 0,
+ &imap, &nimap, NULL);
+ if (error)
+ return error;
+ ASSERT(nimap == 0 || nimap == 1);
+ if (nimap && imap.br_startblock != HOLESTARTBLOCK) {
+ xfs_daddr_t block;
+
+ ASSERT(imap.br_startblock != DELAYSTARTBLOCK);
+ block = imap.br_startblock;
+ mod = do_div(block, mp->m_sb.sb_rextsize);
+ if (mod)
+ startoffset_fsb += mp->m_sb.sb_rextsize - mod;
+ }
+ nimap = 1;
+ error = xfs_bmapi(NULL, ip, endoffset_fsb - 1, 1, 0, NULL, 0,
+ &imap, &nimap, NULL);
+ if (error)
+ return error;
+ ASSERT(nimap == 0 || nimap == 1);
+ if (nimap && imap.br_startblock != HOLESTARTBLOCK) {
+ ASSERT(imap.br_startblock != DELAYSTARTBLOCK);
+ mod++;
+ if (mod && (mod != mp->m_sb.sb_rextsize))
+ endoffset_fsb -= mod;
+ }
+ }
+ if ((done = (endoffset_fsb <= startoffset_fsb)))
+ /*
+ * One contiguous piece to clear
+ */
+ error = xfs_zero_remaining_bytes(ip, offset, offset + len - 1);
+ else {
+ /*
+ * Some full blocks, possibly two pieces to clear
+ */
+ if (offset < XFS_FSB_TO_B(mp, startoffset_fsb))
+ error = xfs_zero_remaining_bytes(ip, offset,
+ XFS_FSB_TO_B(mp, startoffset_fsb) - 1);
+ if (!error &&
+ XFS_FSB_TO_B(mp, endoffset_fsb) < offset + len)
+ error = xfs_zero_remaining_bytes(ip,
+ XFS_FSB_TO_B(mp, endoffset_fsb),
+ offset + len - 1);
+ }
+
+ /*
+ * free file space until done or until there is an error
+ */
+ resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0);
+ while (!error && !done) {
+
+ /*
+ * allocate and setup the transaction
+ */
+ tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT);
+ error = xfs_trans_reserve(tp,
+ resblks,
+ XFS_WRITE_LOG_RES(mp),
+ 0,
+ XFS_TRANS_PERM_LOG_RES,
+ XFS_WRITE_LOG_COUNT);
+
+ /*
+ * check for running out of space
+ */
+ if (error) {
+ /*
+ * Free the transaction structure.
+ */
+ ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp));
+ xfs_trans_cancel(tp, 0);
+ break;
+ }
+ xfs_ilock(ip, XFS_ILOCK_EXCL);
+ error = XFS_TRANS_RESERVE_QUOTA(mp, tp,
+ ip->i_udquot, ip->i_gdquot, resblks, 0, rt ?
+ XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS);
+ if (error)
+ goto error1;
+
+ xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
+ xfs_trans_ihold(tp, ip);
+
+ /*
+ * issue the bunmapi() call to free the blocks
+ */
+ XFS_BMAP_INIT(&free_list, &firstfsb);
+ error = xfs_bunmapi(tp, ip, startoffset_fsb,
+ endoffset_fsb - startoffset_fsb,
+ 0, 2, &firstfsb, &free_list, &done);
+ if (error) {
+ goto error0;
+ }
+
+ /*
+ * complete the transaction
+ */
+ error = xfs_bmap_finish(&tp, &free_list, firstfsb, &committed);
+ if (error) {
+ goto error0;
+ }
+
+ error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
+ }
+
+ xfs_iunlock(ip, XFS_IOLOCK_EXCL);
+ return error;
+
+ error0:
+ xfs_bmap_cancel(&free_list);
+ error1:
+ xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
+ xfs_iunlock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
+ return error;
+}
+
+/*
+ * xfs_change_file_space()
+ * This routine allocates or frees disk space for the given file.
+ * The user specified parameters are checked for alignment and size
+ * limitations.
+ *
+ * RETURNS:
+ * 0 on success
+ * errno on error
+ *
+ */
+int
+xfs_change_file_space(
+ bhv_desc_t *bdp,
+ int cmd,
+ xfs_flock64_t *bf,
+ xfs_off_t offset,
+ cred_t *credp,
+ int attr_flags)
+{
+ int clrprealloc;
+ int error;
+ xfs_fsize_t fsize;
+ xfs_inode_t *ip;
+ xfs_mount_t *mp;
+ int setprealloc;
+ xfs_off_t startoffset;
+ xfs_off_t llen;
+ xfs_trans_t *tp;
+ vattr_t va;
+ vnode_t *vp;
+
+ vp = BHV_TO_VNODE(bdp);
+ vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
+
+ ip = XFS_BHVTOI(bdp);
+ mp = ip->i_mount;
+
+ /*
+ * must be a regular file and have write permission
+ */
+ if (vp->v_type != VREG)
+ return XFS_ERROR(EINVAL);
+
+ xfs_ilock(ip, XFS_ILOCK_SHARED);
+
+ if ((error = xfs_iaccess(ip, S_IWUSR, credp))) {
+ xfs_iunlock(ip, XFS_ILOCK_SHARED);
+ return error;
+ }
+
+ xfs_iunlock(ip, XFS_ILOCK_SHARED);
+
+ switch (bf->l_whence) {
+ case 0: /*SEEK_SET*/
+ break;
+ case 1: /*SEEK_CUR*/
+ bf->l_start += offset;
+ break;
+ case 2: /*SEEK_END*/
+ bf->l_start += ip->i_d.di_size;
+ break;
+ default:
+ return XFS_ERROR(EINVAL);
+ }
+
+ llen = bf->l_len > 0 ? bf->l_len - 1 : bf->l_len;
+
+ if ( (bf->l_start < 0)
+ || (bf->l_start > XFS_MAXIOFFSET(mp))
+ || (bf->l_start + llen < 0)
+ || (bf->l_start + llen > XFS_MAXIOFFSET(mp)))
+ return XFS_ERROR(EINVAL);
+
+ bf->l_whence = 0;
+
+ startoffset = bf->l_start;
+ fsize = ip->i_d.di_size;
+
+ /*
+ * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve
+ * file space.
+ * These calls do NOT zero the data space allocated to the file,
+ * nor do they change the file size.
+ *
+ * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file
+ * space.
+ * These calls cause the new file data to be zeroed and the file
+ * size to be changed.
+ */
+ setprealloc = clrprealloc = 0;
+
+ switch (cmd) {
+ case XFS_IOC_RESVSP:
+ case XFS_IOC_RESVSP64:
+ error = xfs_alloc_file_space(ip, startoffset, bf->l_len,
+ 1, attr_flags);
+ if (error)
+ return error;
+ setprealloc = 1;
+ break;
+
+ case XFS_IOC_UNRESVSP:
+ case XFS_IOC_UNRESVSP64:
+ if ((error = xfs_free_file_space(ip, startoffset, bf->l_len,
+ attr_flags)))
+ return error;
+ break;
+
+ case XFS_IOC_ALLOCSP:
+ case XFS_IOC_ALLOCSP64:
+ case XFS_IOC_FREESP:
+ case XFS_IOC_FREESP64:
+ if (startoffset > fsize) {
+ error = xfs_alloc_file_space(ip, fsize,
+ startoffset - fsize, 0, attr_flags);
+ if (error)
+ break;
+ }
+
+ va.va_mask = XFS_AT_SIZE;
+ va.va_size = startoffset;
+
+ error = xfs_setattr(bdp, &va, attr_flags, credp);
+
+ if (error)
+ return error;
+
+ clrprealloc = 1;
+ break;
+
+ default:
+ ASSERT(0);
+ return XFS_ERROR(EINVAL);
+ }
+
+ /*
+ * update the inode timestamp, mode, and prealloc flag bits
+ */
+ tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID);
+
+ if ((error = xfs_trans_reserve(tp, 0, XFS_WRITEID_LOG_RES(mp),
+ 0, 0, 0))) {
+ /* ASSERT(0); */
+ xfs_trans_cancel(tp, 0);
+ return error;
+ }
+
+ xfs_ilock(ip, XFS_ILOCK_EXCL);
+
+ xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
+ xfs_trans_ihold(tp, ip);
+
+ ip->i_d.di_mode &= ~S_ISUID;
+
+ /*
+ * Note that we don't have to worry about mandatory
+ * file locking being disabled here because we only
+ * clear the S_ISGID bit if the Group execute bit is
+ * on, but if it was on then mandatory locking wouldn't
+ * have been enabled.
+ */
+ if (ip->i_d.di_mode & S_IXGRP)
+ ip->i_d.di_mode &= ~S_ISGID;
+
+ xfs_ichgtime(ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
+
+ if (setprealloc)
+ ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC;
+ else if (clrprealloc)
+ ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC;
+
+ xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
+ xfs_trans_set_sync(tp);
+
+ error = xfs_trans_commit(tp, 0, NULL);
+
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
+
+ return error;
+}
+
+vnodeops_t xfs_vnodeops = {
+ BHV_IDENTITY_INIT(VN_BHV_XFS,VNODE_POSITION_XFS),
+ .vop_open = xfs_open,
+ .vop_read = xfs_read,
+#ifdef HAVE_SENDFILE
+ .vop_sendfile = xfs_sendfile,
+#endif
+ .vop_write = xfs_write,
+ .vop_ioctl = xfs_ioctl,
+ .vop_getattr = xfs_getattr,
+ .vop_setattr = xfs_setattr,
+ .vop_access = xfs_access,
+ .vop_lookup = xfs_lookup,
+ .vop_create = xfs_create,
+ .vop_remove = xfs_remove,
+ .vop_link = xfs_link,
+ .vop_rename = xfs_rename,
+ .vop_mkdir = xfs_mkdir,
+ .vop_rmdir = xfs_rmdir,
+ .vop_readdir = xfs_readdir,
+ .vop_symlink = xfs_symlink,
+ .vop_readlink = xfs_readlink,
+ .vop_fsync = xfs_fsync,
+ .vop_inactive = xfs_inactive,
+ .vop_fid2 = xfs_fid2,
+ .vop_rwlock = xfs_rwlock,
+ .vop_rwunlock = xfs_rwunlock,
+ .vop_bmap = xfs_bmap,
+ .vop_reclaim = xfs_reclaim,
+ .vop_attr_get = xfs_attr_get,
+ .vop_attr_set = xfs_attr_set,
+ .vop_attr_remove = xfs_attr_remove,
+ .vop_attr_list = xfs_attr_list,
+ .vop_link_removed = (vop_link_removed_t)fs_noval,
+ .vop_vnode_change = (vop_vnode_change_t)fs_noval,
+ .vop_tosspages = fs_tosspages,
+ .vop_flushinval_pages = fs_flushinval_pages,
+ .vop_flush_pages = fs_flush_pages,
+ .vop_release = xfs_release,
+ .vop_iflush = xfs_inode_flush,
+};
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)