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/*
* Copyright (c) 2000 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 <asm/fcntl.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
extern int xfs_ioctl(bhv_desc_t *, struct inode *, struct file *,
unsigned int, unsigned long);
#ifdef XFS_RW_TRACE
STATIC void
xfs_ctrunc_trace(
int tag,
xfs_inode_t *ip);
#else
#define xfs_ctrunc_trace(tag, ip)
#endif /* DEBUG */
/*
* 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.
*/
/*ARGSUSED*/
STATIC int
xfs_open(
bhv_desc_t *bdp,
vnode_t **vpp,
mode_t flag,
cred_t *credp)
{
int mode;
int rval = 0;
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);
(void)xfs_da_reada_buf(NULL, ip, 0, XFS_DATA_FORK);
xfs_iunlock(ip, mode);
}
#if !XFS_BIG_FILES
else if (vp->v_type == VREG) {
xfs_ilock(ip, XFS_ILOCK_SHARED);
if (ip->i_d.di_size > XFS_MAX_FILE_OFFSET)
rval = XFS_ERROR(EFBIG);
xfs_iunlock(ip, XFS_ILOCK_SHARED);
}
#endif
return rval;
}
/*
* xfs_close
*
*/
/*ARGSUSED*/
STATIC int
xfs_close(
bhv_desc_t *bdp,
int flag,
lastclose_t lastclose,
cred_t *credp)
{
/* REFERENCED */
vnode_t *vp;
vp = BHV_TO_VNODE(bdp);
vn_trace_exit(vp, "xfs_close", (inst_t *)__return_address);
return 0;
}
/*
* xfs_getattr
*/
/*ARGSUSED*/
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, "xfs_getattr", (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 == AT_SIZE) {
if (!(flags & ATTR_LAZY))
xfs_iunlock(ip, XFS_ILOCK_SHARED);
return 0;
}
vap->va_nblocks =
XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
vap->va_fsid = ip->i_dev;
#if XFS_BIG_FILESYSTEMS
vap->va_nodeid = ip->i_ino + mp->m_inoadd;
#else
vap->va_nodeid = ip->i_ino;
#endif
vap->va_nlink = ip->i_d.di_nlink;
/*
* Quick exit for non-stat callers
*/
if ((vap->va_mask & ~(AT_SIZE|AT_FSID|AT_NODEID|AT_NLINK)) == 0) {
if (!(flags & ATTR_LAZY))
xfs_iunlock(ip, XFS_ILOCK_SHARED);
return 0;
}
/*
* 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_blksize = 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_blksize =
/*
* 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_blksize = 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 = IRIX_DEV_TO_KDEVT(ip->i_df.if_u2.if_rdev);
vap->va_blksize = 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 &
(AT_XFLAGS|AT_EXTSIZE|AT_NEXTENTS|AT_ANEXTENTS|
AT_GENCOUNT|AT_VCODE)) == 0) {
if (!(flags & ATTR_LAZY))
xfs_iunlock(ip, XFS_ILOCK_SHARED);
return 0;
}
/*
* convert di_flags to xflags
*/
vap->va_xflags =
((ip->i_d.di_flags & XFS_DIFLAG_REALTIME) ?
XFS_XFLAG_REALTIME : 0) |
((ip->i_d.di_flags & XFS_DIFLAG_PREALLOC) ?
XFS_XFLAG_PREALLOC : 0);
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 != NULL)
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_gencount = ip->i_d.di_gen;
vap->va_vcode = 0L;
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 privileged;
int mandlock_before, mandlock_after;
uint qflags;
struct xfs_dquot *udqp, *gdqp, *olddquot1, *olddquot2;
int file_owner;
vp = BHV_TO_VNODE(bdp);
vn_trace_entry(vp, "xfs_setattr", (inst_t *)__return_address);
/*
* Cannot set certain attributes.
*/
mask = vap->va_mask;
if (mask & 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 & AT_UPDTIMES) {
ASSERT((mask & ~AT_UPDTIMES) == 0);
timeflags = ((mask & AT_UPDATIME) ? XFS_ICHGTIME_ACC : 0) |
((mask & AT_UPDCTIME) ? XFS_ICHGTIME_CHG : 0) |
((mask & 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 & (AT_UID|AT_GID))) {
qflags = 0;
if (mask & AT_UID) {
uid = vap->va_uid;
qflags |= XFS_QMOPT_UQUOTA;
} else {
uid = ip->i_d.di_uid;
}
if (mask & 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);
if ((code = xfs_qm_vop_dqalloc(mp, ip, uid, gid, qflags,
&udqp, &gdqp)))
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 & AT_SIZE)) {
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_dm_send_data_event (DM_EVENT_TRUNCATE, bdp,
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 == 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 & (AT_MODE|AT_XFLAGS|AT_EXTSIZE|AT_UID|AT_GID|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 & AT_MODE) {
mode_t m = 0;
if ((vap->va_mode & ISUID) && !file_owner)
m |= ISUID;
if ((vap->va_mode & ISGID) &&
!in_group_p((gid_t)ip->i_d.di_gid))
m |= ISGID;
if ((vap->va_mode & ISVTX) && vp->v_type != VDIR)
m |= ISVTX;
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 & (AT_UID|AT_GID|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 & AT_GID) ? vap->va_gid : igid;
uid = (mask & AT_UID) ? vap->va_uid : iuid;
projid = (mask & 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);
/*
* XXX:casey - This may result in unnecessary auditing.
*/
privileged = capable(CAP_FOWNER);
if ((code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
privileged ?
XFS_QMOPT_FORCE_RES :
0)))
/* out of quota */
goto error_return;
}
}
/*
* Truncate file. Must have write permission and not be a directory.
*/
if (mask & 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 & 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;
}
if (vp->v_flag & VISSWAP) {
code = XFS_ERROR(EACCES);
goto error_return;
}
/*
* Make sure that the dquots are attached to the inode.
*/
if (XFS_IS_QUOTA_ON(mp) && XFS_NOT_DQATTACHED(mp, ip)) {
if ((code = xfs_qm_dqattach(ip, XFS_QMOPT_ILOCKED)))
goto error_return;
}
}
/*
* Change file access or modified times.
*/
if (mask & (AT_ATIME|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 & (AT_EXTSIZE|AT_XFLAGS)) {
/*
* Can't change extent size if any extents are allocated.
*/
if (ip->i_d.di_nextents && (mask & 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 & AT_EXTSIZE) &&
((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
vap->va_extsize) &&
(!((ip->i_d.di_flags & XFS_DIFLAG_REALTIME) ||
((mask & 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 & 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 & AT_EXTSIZE) && vap->va_extsize != 0) {
xfs_extlen_t size;
if ((ip->i_d.di_flags & XFS_DIFLAG_REALTIME) ||
((mask & 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 & 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;
}
}
}
/*
* Now we can make the changes. Before we join the inode
* to the transaction, if 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 & 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);
}
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 & 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 & AT_MODE) {
ip->i_d.di_mode &= IFMT;
ip->i_d.di_mode |= vap->va_mode & ~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 & (AT_UID|AT_GID|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 & (ISUID|ISGID)) &&
!capable(CAP_FSETID)) {
ip->i_d.di_mode &= ~(ISUID|ISGID);
}
/*
* Change the ownerships and register quota modifications
* in the transaction.
*/
if (iuid != uid) {
if (XFS_IS_UQUOTA_ON(mp)) {
ASSERT(mask & AT_UID);
ASSERT(udqp);
ASSERT(xfs_qm_dqid(udqp) == (xfs_dqid_t)uid);
olddquot1 = xfs_qm_vop_chown(tp, ip,
&ip->i_udquot,
udqp);
/*
* We'll dqrele olddquot at the end.
*/
}
ip->i_d.di_uid = uid;
}
if (igid != gid) {
if (XFS_IS_GQUOTA_ON(mp)) {
ASSERT(mask & AT_GID);
ASSERT(gdqp);
ASSERT(xfs_qm_dqid(gdqp) == gid);
olddquot2 = xfs_qm_vop_chown(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 & (AT_ATIME|AT_MTIME)) {
if (mask & 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 & 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;
}
}
/*
* Change XFS-added attributes.
*/
if (mask & (AT_EXTSIZE|AT_XFLAGS)) {
if (mask & AT_EXTSIZE) {
/*
* Converting bytes to fs blocks.
*/
ip->i_d.di_extsize = vap->va_extsize >>
mp->m_sb.sb_blocklog;
}
if (mask & AT_XFLAGS) {
ip->i_d.di_flags = 0;
if (vap->va_xflags & XFS_XFLAG_REALTIME) {
ip->i_d.di_flags |= XFS_DIFLAG_REALTIME;
/* This is replicated in the io core for
* CXFS use
*/
ip->i_iocore.io_flags |= XFS_IOCORE_RT;
}
/* 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 AT_CTIME set
* AND we have been called by a DMI function.
*/
if ( (flags & ATTR_DMI) && (mask & 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(xfsstats.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.
*/
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) inode had kept before chown
*/
if (olddquot1)
xfs_qm_dqrele(olddquot1);
if (olddquot2)
xfs_qm_dqrele(olddquot2);
if (udqp)
xfs_qm_dqrele(udqp);
if (gdqp)
xfs_qm_dqrele(gdqp);
if (code) {
return code;
}
if (DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_ATTRIBUTE) &&
!(flags & ATTR_DMI)) {
(void) dm_send_namesp_event (DM_EVENT_ATTRIBUTE, bdp, 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:
if (udqp)
xfs_qm_dqrele(udqp);
if (gdqp)
xfs_qm_dqrele(gdqp);
if (tp) {
xfs_trans_cancel(tp, commit_flags);
}
if (lock_flags != 0) {
xfs_iunlock(ip, lock_flags);
}
return code;
} /* xfs_setattr */
/*
* xfs_access
* Null conversion from vnode mode bits to inode mode bits, as in efs.
*/
/*ARGSUSED*/
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), "xfs_access",
(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
*
*/
/*ARGSUSED*/
STATIC int
xfs_readlink(
bhv_desc_t *bdp,
uio_t *uiop,
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;
xfs_fsblock_t firstblock;
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, "xfs_readlink", (inst_t *)__return_address);
if (vp->v_type != VLNK)
return XFS_ERROR(EINVAL);
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 & IFMT) == 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 (!(uiop->uio_fmode & FINVIS)) {
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 = uiomove(ip->i_df.if_u1.if_data, pathlen, UIO_READ, uiop);
}
else {
/*
* Symlink not inline. Call bmap to get it in.
*/
nmaps = SYMLINK_MAPS;
firstblock = NULLFSBLOCK;
error = xfs_bmapi(NULL, ip, 0, XFS_B_TO_FSB(mp, pathlen),
0, &firstblock, 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 = uiomove(XFS_BUF_PTR(bp), byte_cnt,
UIO_READ, 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.
*/
/*ARGSUSED*/
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;
/* REFERENCED */
int error2;
/* REFERENCED */
int syncall;
vnode_t *vp;
xfs_trans_t *tp;
vp = BHV_TO_VNODE(bdp);
vn_trace_entry(vp, "xfs_fsync", (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);
}
/*
* Make sure that we flushed everything in a full sync.
* We used to assert that i_delayed_blks was 0 here,
* but we can't do that since xfs_allocstore() could
* come in and add more even though we have the I/O
* lock here. All it needs to do so is the inode lock,
* and we don't want to force it to acquire the I/O
* lock unnecessarily.
*/
ASSERT(!(flag & (FSYNC_INVAL | FSYNC_WAIT)) ||
syncall == 0 || (ip->i_iocore.io_queued_bufs == 0));
/*
* 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.)
*/
if (!(flag & FSYNC_DATA)) {
xfs_ilock(ip, XFS_ILOCK_SHARED);
if (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.
*/
if (xfs_ipincount(ip) == 0) {
xfs_iunlock(ip, XFS_IOLOCK_EXCL |
XFS_ILOCK_SHARED);
} else {
xfs_iunlock(ip, XFS_IOLOCK_EXCL |
XFS_ILOCK_SHARED);
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);
}
} else {
/*
* We don't care about the timestamps here. We
* only care about the size field growing on us
* and forcing any space allocation transactions.
* We have to flush changes to the size fields
* otherwise we could write out data that
* becomes inaccessible after a crash.
*/
xfs_ilock(ip, XFS_ILOCK_SHARED);
if (ip->i_update_size == 0) {
/*
* Force the log if the inode is pinned.
* That ensures that all transactions committed
* against the inode hit the disk. This may do
* too much work but it's safe.
*/
if (xfs_ipincount(ip) == 0) {
xfs_iunlock(ip, XFS_IOLOCK_EXCL |
XFS_ILOCK_SHARED);
} else {
xfs_iunlock(ip, XFS_IOLOCK_EXCL |
XFS_ILOCK_SHARED);
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 sync transaction to log the inode
* core. The transaction has to be sync since
* we need these updates to guarantee that the
* data written will be seen. 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;
xfs_fsblock_t first_block;
/*
* 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_MAX_FILE_OFFSET);
map_len = last_fsb - end_fsb;
if (map_len <= 0)
return (0);
nimaps = 1;
first_block = NULLFSBLOCK;
xfs_ilock(ip, XFS_ILOCK_SHARED);
error = xfs_bmapi(NULL, ip, end_fsb, map_len, 0,
&first_block, 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 (XFS_IS_QUOTA_ON(mp) &&
ip->i_ino != mp->m_sb.sb_uquotino &&
ip->i_ino != mp->m_sb.sb_gquotino) {
if (XFS_NOT_DQATTACHED(mp, ip)) {
if ((error = xfs_qm_dqattach(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,
int *commitflags)
{
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, *commitflags, NULL);
xfs_iunlock(ip, XFS_ILOCK_EXCL);
*commitflags = 0;
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, 0,
XFS_DEFAULT_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);
}
/*ARGSUSED*/
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 we are in the NFS reference cache then don't do this now */
if (ip->i_refcache)
return 0;
mp = ip->i_mount;
if (ip->i_d.di_nlink != 0) {
if ((((ip->i_d.di_mode & IFMT) == 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))) {
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.
*/
/*ARGSUSED*/
STATIC int
xfs_inactive(
bhv_desc_t *bdp,
cred_t *credp)
{
xfs_inode_t *ip;
/* REFERENCED */
vnode_t *vp;
xfs_trans_t *tp;
xfs_mount_t *mp;
int error;
int commit_flags;
int truncate;
vp = BHV_TO_VNODE(bdp);
vn_trace_entry(vp, "xfs_inactive", (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 & IFMT) == IFREG));
mp = ip->i_mount;
if (ip->i_d.di_nlink == 0 &&
DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_DESTROY)) {
(void) dm_send_destroy_event(bdp, DM_RIGHT_NULL);
}
/*
* We don't mark the TEARDOWN flag, so
* xfs_inactive always returns VN_INACTIVE_CACHE.
*/
ASSERT(! (vp->v_flag & VINACTIVE_TEARDOWN));
error = 0;
if (ip->i_d.di_nlink != 0) {
if ((((ip->i_d.di_mode & IFMT) == 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) ||
(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 (XFS_IS_QUOTA_ON(mp) &&
ip->i_ino != mp->m_sb.sb_uquotino &&
ip->i_ino != mp->m_sb.sb_gquotino) {
if (XFS_NOT_DQATTACHED(mp, ip)) {
if ((error = xfs_qm_dqattach(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));
commit_flags = XFS_TRANS_RELEASE_LOG_RES;
if (error) {
xfs_trans_cancel(tp, commit_flags | XFS_TRANS_ABORT);
xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
return (VN_INACTIVE_CACHE);
}
} else if ((ip->i_d.di_mode & IFMT) == 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);
commit_flags = XFS_TRANS_RELEASE_LOG_RES;
} else {
error = xfs_trans_reserve(tp, 0,
XFS_IFREE_LOG_RES(mp),
0, 0,
XFS_DEFAULT_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);
commit_flags = 0;
}
/*
* 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, &commit_flags);
/*
* 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.
*/
error = xfs_ifree(tp, ip);
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(tp->t_mountp)) {
cmn_err(CE_NOTE,
"xfs_inactive: xfs_ifree() returned an error = %d on %s",
error,tp->t_mountp->m_fsname);
xfs_force_shutdown(tp->t_mountp, XFS_METADATA_IO_ERROR);
}
xfs_trans_cancel(tp, commit_flags | XFS_TRANS_ABORT);
} else {
/*
* Credit the quota account(s). The inode is gone.
*/
if (XFS_IS_QUOTA_ON(tp->t_mountp))
(void) xfs_trans_mod_dquot_byino(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_trans_commit(tp, commit_flags, NULL);
}
/*
* Release the dquots held by inode, if any.
*/
if (ip->i_udquot || ip->i_gdquot)
xfs_qm_dqdettach_inode(ip);
xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
out:
return VN_INACTIVE_CACHE;
}
/*
* xfs_lookup
*/
/*ARGSUSED*/
STATIC int
xfs_lookup(
bhv_desc_t *dir_bdp,
char *name,
vnode_t **vpp,
pathname_t *pnp,
int flags,
vnode_t *rdir,
cred_t *credp)
{
xfs_inode_t *dp, *ip;
struct vnode *vp;
xfs_ino_t e_inum;
int error;
uint lock_mode;
uint lookup_flags;
uint dir_unlocked;
vnode_t *dir_vp;
dir_vp = BHV_TO_VNODE(dir_bdp);
vn_trace_entry(dir_vp, "xfs_lookup", (inst_t *)__return_address);
/*
* If it's not a directory, fail the request.
*/
if (dir_vp->v_type != VDIR) {
return XFS_ERROR(ENOTDIR);
}
dp = XFS_BHVTOI(dir_bdp);
if (XFS_FORCED_SHUTDOWN(dp->i_mount))
return XFS_ERROR(EIO);
lock_mode = xfs_ilock_map_shared(dp);
/*
* If the directory has been removed, then fail all lookups.
*/
if (dp->i_d.di_nlink == 0) {
xfs_iunlock_map_shared(dp, lock_mode);
return XFS_ERROR(ENOENT);
}
lookup_flags = DLF_IGET;
if (lock_mode == XFS_ILOCK_SHARED) {
lookup_flags |= DLF_LOCK_SHARED;
}
error = xfs_dir_lookup_int(NULL, dir_bdp, lookup_flags, name, pnp,
&e_inum, &ip, &dir_unlocked);
if (error) {
xfs_iunlock_map_shared(dp, lock_mode);
return error;
}
vp = XFS_ITOV(ip);
if (dir_unlocked) {
/*
* If the directory had to be unlocked in the call,
* then its permissions may have changed. Make sure
* that it is OK to give this inode back to the caller.
*/
if ((error = xfs_iaccess(dp, IEXEC, credp))) {
xfs_iunlock_map_shared(dp, lock_mode);
VN_RELE(vp);
return error;
}
}
ITRACE(ip);
xfs_iunlock_map_shared(dp, lock_mode);
*vpp = vp;
return 0;
}
#ifdef XFS_RW_TRACE
STATIC void
xfs_ctrunc_trace(
int tag,
xfs_inode_t *ip)
{
if (ip->i_rwtrace == NULL) {
return;
}
ktrace_enter(ip->i_rwtrace,
(void*)((long)tag),
(void*)ip,
(void*)((long)private.p_cpuid),
(void*)0,
(void*)0,
(void*)0,
(void*)0,
(void*)0,
(void*)0,
(void*)0,
(void*)0,
(void*)0,
(void*)0,
(void*)0,
(void*)0,
(void*)0);
}
#endif /* XFS_RW_TRACE */
STATIC void xfs_create_broken(xfs_mount_t *, xfs_inode_t *, xfs_ino_t, uint);
#define XFS_CREATE_NEW_MAXTRIES 10000
/*
* xfs_create (create a new file).
* It might still find name exists out there, though.
* But vpp, doens't point at a vnode.
*/
STATIC int
xfs_create(
bhv_desc_t *dir_bdp,
char *name,
vattr_t *vap,
int flags,
int I_mode,
vnode_t **vpp,
cred_t *credp)
{
vnode_t *dir_vp;
xfs_inode_t *dp, *ip;
vnode_t *vp=NULL;
xfs_trans_t *tp;
xfs_ino_t e_inum;
xfs_mount_t *mp;
dev_t rdev;
int error;
xfs_bmap_free_t free_list;
xfs_fsblock_t first_block;
boolean_t dp_joined_to_trans;
boolean_t truncated;
boolean_t created = B_FALSE;
boolean_t inode_change = B_FALSE;
int dm_event_sent = 0;
uint cancel_flags;
int committed;
uint dir_unlocked;
xfs_prid_t prid;
struct xfs_dquot *udqp, *gdqp;
uint resblks;
int dm_di_mode;
int xfs_create_retries = 0;
xfs_ino_t e_inum_saved; /* for retry trap code */
int namelen;
ASSERT(!*vpp);
dir_vp = BHV_TO_VNODE(dir_bdp);
dp = XFS_BHVTOI(dir_bdp);
vn_trace_entry(dir_vp, "xfs_create", (inst_t *)__return_address);
dm_di_mode = vap->va_mode|VTTOIF(vap->va_type);
namelen = strlen(name);
if (namelen >= MAXNAMELEN)
return XFS_ERROR(ENAMETOOLONG);
if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_CREATE)) {
error = xfs_dm_send_create_event(dir_bdp, name,
dm_di_mode, &dm_event_sent);
if (error)
return error;
}
/* Return through std_return after this point. */
mp = dp->i_mount;
if (XFS_FORCED_SHUTDOWN(mp))
return XFS_ERROR(EIO);
udqp = gdqp = NULL;
if (vap->va_mask & 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.
*/
if (XFS_IS_QUOTA_ON(mp)) {
error = xfs_qm_vop_dqalloc(mp, dp,
current->fsuid, current->fsgid,
XFS_QMOPT_QUOTALL|XFS_QMOPT_INHERIT,
&udqp, &gdqp);
if (error)
goto std_return;
}
try_again:
ip = NULL;
dp_joined_to_trans = B_FALSE;
truncated = 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);
/*
* If the directory has been removed, then fail all creates.
*/
if (dp->i_d.di_nlink == 0) {
error = XFS_ERROR(ENOENT);
goto error_return;
}
/*
* At this point we cannot do an xfs_iget() of the entry named
* since we are already holding a log reservation and it could
* be in xfs_inactive waiting for a log reservation. We'd just
* end up waiting forever for the inactive to complete. Instead
* we just look to see if there is an entry with the name. In
* the case where there is not, we didn't need the inode anyway.
* In the case where there is an entry, we'll get it later after
* dropping our transaction.
*/
error = xfs_dir_lookup_int(NULL, dir_bdp, DLF_NODNLC, name,
NULL, &e_inum, NULL, NULL);
if (error && (error != ENOENT)) {
goto error_return;
}
XFS_BMAP_INIT(&free_list, &first_block);
if (error == ENOENT) {
ASSERT(ip == NULL);
/*
* XPG4 says create cannot allocate a file if the
* file size limit is set to 0.
*/
if (flags & VZFS) {
error = XFS_ERROR(EFBIG);
goto error_return;
}
/*
* Reserve disk quota and the inode.
*/
if (XFS_IS_QUOTA_ON(mp)) {
if (xfs_trans_reserve_quota(tp, udqp, gdqp, resblks,
1, 0)) {
error = EDQUOT;
goto error_return;
}
}
if (resblks == 0 &&
(error = XFS_DIR_CANENTER(mp, tp, dp, name, namelen)))
goto error_return;
rdev = (vap->va_mask & AT_RDEV) ? vap->va_rdev : NODEV;
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.
*/
if (XFS_IS_QUOTA_ON(mp))
xfs_qm_vop_dqattach_and_dqmod_newinode(tp, ip, udqp,
gdqp);
created = B_TRUE;
} else {
e_inum_saved = e_inum;
/*
* The file already exists, so we're in the wrong
* transaction for this operation. Cancel the old
* transaction and start a new one. We have to drop
* our locks in doing this. But, we don't care
* if the directory changes. We have already checked
* if the dir exists and is EXEC by the user.
* After all, we already have the vnode held.
*
* All we need to do is truncate it.
*/
xfs_trans_cancel(tp, cancel_flags);
tp = NULL;
/*
* Now that we've dropped our log reservation, get a
* reference to the inode we are re-creating. If we
* have to drop the directory lock in the call and
* the entry is removed, then just start over.
*/
error = xfs_dir_lookup_int(NULL, dir_bdp, DLF_IGET, name,
NULL, &e_inum, &ip, &dir_unlocked);
if (error) {
if (error == ENOENT) {
if (++xfs_create_retries >
XFS_CREATE_NEW_MAXTRIES) {
xfs_create_broken(mp, dp,
e_inum_saved, dir_unlocked);
error = XFS_ERROR(EFSCORRUPTED);
goto error_return;
}
ASSERT(dir_unlocked);
xfs_iunlock(dp, XFS_ILOCK_EXCL);
goto try_again;
}
goto error_return;
}
ITRACE(ip);
xfs_iunlock(dp, XFS_ILOCK_EXCL);
dp = NULL;
/*
* Done with directory. Don't care about it
* anymore.
*/
/*
* Since we're at a good, clean point, check for any
* obvious problems and get out if they occur.
*/
vp = XFS_ITOV(ip);
if (!error) {
if (flags & VEXCL) {
error = XFS_ERROR(EEXIST);
} else if (vp->v_type == VDIR) {
error = XFS_ERROR(EISDIR);
} else if (vp->v_type == VREG &&
(vap->va_mask & AT_SIZE) &&
DM_EVENT_ENABLED (vp->v_vfsp, ip,
DM_EVENT_TRUNCATE)) {
error = xfs_dm_send_data_event(
DM_EVENT_TRUNCATE,
XFS_ITOBHV(ip),
vap->va_size, 0, 0, NULL);
}
}
if (!error && XFS_IS_QUOTA_ON(mp)) {
if (XFS_NOT_DQATTACHED(mp, ip))
error = xfs_qm_dqattach(ip, 0);
}
if (error) {
IRELE(ip);
goto error_return;
}
/* Need the behaviour lock before the iolock as we are
* potentially going to make a VOP call on vp. */
VN_BHV_READ_LOCK(&(vp)->v_bh);
/*
* We need to do the xfs_itruncate_start call before
* reserving any log space in the transaction.
*/
xfs_ilock(ip, XFS_IOLOCK_EXCL);
xfs_ctrunc_trace(XFS_CTRUNC1, ip);
if ((vp->v_type == VREG) &&
(vap->va_mask & AT_SIZE) &&
((ip->i_d.di_size != 0) || (ip->i_d.di_nextents != 0))) {
xfs_itruncate_start(ip, XFS_ITRUNC_MAYBE, 0);
}
/* Once we got the I/O lock we can drop the behaviour
* lock.
*/
VN_BHV_READ_UNLOCK(&(vp)->v_bh);
tp = xfs_trans_alloc(mp, XFS_TRANS_CREATE_TRUNC);
if ((error = xfs_trans_reserve(tp, 0,
XFS_ITRUNCATE_LOG_RES(mp), 0,
XFS_TRANS_PERM_LOG_RES,
XFS_ITRUNCATE_LOG_COUNT))) {
xfs_iunlock(ip, XFS_IOLOCK_EXCL);
IRELE(ip);
cancel_flags = 0;
xfs_ctrunc_trace(XFS_CTRUNC2, ip);
goto error_return;
}
/*
* Now lock inode.
*/
xfs_ilock(ip, XFS_ILOCK_EXCL);
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
if (error) {
xfs_ctrunc_trace(XFS_CTRUNC4, ip);
goto error_return;
}
if (vp->v_type == VREG && (vap->va_mask & AT_SIZE)) {
/*
* Truncate the file. The timestamps must
* be updated whether the file is changed
* or not.
*/
ASSERT(vap->va_size == 0);
if ((ip->i_d.di_size > 0) || (ip->i_d.di_nextents)) {
xfs_ctrunc_trace(XFS_CTRUNC5, ip);
xfs_trans_ihold(tp, ip);
/*
* always signal sync xaction. We're
* truncating an existing file so the
* xaction must be sync regardless
* of whether the filesystem is wsync
* to make the truncate persistent
* in the face of a crash.
*/
error = xfs_itruncate_finish(&tp, ip,
(xfs_fsize_t)0,
XFS_DATA_FORK, 1);
if (error) {
ASSERT(ip->i_transp == tp);
xfs_trans_ihold_release(tp, ip);
goto abort_return;
}
truncated = B_TRUE;
xfs_ichgtime(ip,
XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
} else {
xfs_ichgtime(ip,
XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
}
inode_change = B_TRUE;
}
xfs_ctrunc_trace(XFS_CTRUNC6, ip);
}
/*
* 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);
if (truncated) {
/*
* If we truncated the file, then the inode will
* have been held within the previous transaction
* and must be unlocked now.
*/
xfs_iunlock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
ASSERT(vn_count(vp) >= 2);
IRELE(ip);
}
goto abort_rele;
}
error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
if (truncated) {
/*
* If we truncated the file, then the inode will
* have been held within the transaction and must
* be unlocked now.
*/
xfs_iunlock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
ASSERT(vn_count(vp) >= 2);
IRELE(ip);
}
if (error) {
IRELE(ip);
tp = NULL;
goto error_return;
}
if (udqp)
xfs_qm_dqrele(udqp);
if (gdqp)
xfs_qm_dqrele(gdqp);
#ifdef CELL_CAPABLE
/*
* Propogate the fact that the vnode changed after the
* xfs_inode locks have been released.
*/
if (cell_enabled) {
#pragma mips_frequency_hint NEVER
if (inode_change == B_TRUE)
VOP_VNODE_CHANGE(vp, VCHANGE_FLAGS_TRUNCATED, 0);
}
#endif /* CELL_CAPABLE */
*vpp = vp;
/* Fallthrough to std_return with error = 0 */
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) dm_send_namesp_event(DM_EVENT_POSTCREATE,
dir_bdp, DM_RIGHT_NULL,
created ? vn_bhv_lookup_unlocked(VN_BHV_HEAD(vp), &xfs_vnodeops):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);
if (udqp)
xfs_qm_dqrele(udqp);
if (gdqp)
xfs_qm_dqrele(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);
if (udqp)
xfs_qm_dqrele(udqp);
if (gdqp)
xfs_qm_dqrele(gdqp);
goto std_return;
}
/*
* xfs_create_broken is a trap routine to isolate the cause of a infinite
* loop condition reported in IRIX 6.4 by PV 522864. If no occurances
* of this error recur (that is, the trap code isn't hit), this routine
* should be removed in future releases.
*/
/* ARGSUSED */
STATIC void
xfs_create_broken(
xfs_mount_t *mp,
xfs_inode_t *dp,
xfs_ino_t e_inum_saved,
uint dir_unlocked)
{
cmn_err(CE_WARN,
"xfs_create looping, dir ino 0x%Lx, ino 0x%Lx, %s\n",
dp->i_ino, e_inum_saved, mp->m_fsname);
#ifdef DEBUG
BUG();
#endif /* DEBUG */
}
/*
* xfs_get_dir_entry is used to get a reference to an inode given
* its parent directory inode and the name of the file. It does
* not lock the child inode, and it unlocks the directory before
* returning. The directory's generation number is returned for
* use by a later call to xfs_lock_dir_and_entry.
*/
STATIC int
xfs_get_dir_entry(
xfs_inode_t *dp,
char *name,
xfs_inode_t **ipp, /* inode of entry 'name' */
int *dir_generationp)
{
xfs_inode_t *ip;
xfs_ino_t e_inum;
int error;
uint dir_unlocked;
xfs_ilock(dp, XFS_ILOCK_EXCL);
/*
* If the link count on the directory is 0, there are no
* entries to look for.
*/
if (dp->i_d.di_nlink == 0) {
xfs_iunlock(dp, XFS_ILOCK_EXCL);
*ipp = NULL;
return XFS_ERROR(ENOENT);
}
if (*ipp == NULL) {
error = xfs_dir_lookup_int(NULL, XFS_ITOBHV(dp), DLF_IGET,
name, NULL, &e_inum, &ip,
&dir_unlocked);
if (error) {
xfs_iunlock(dp, XFS_ILOCK_EXCL);
*ipp = NULL;
return error;
}
ASSERT((e_inum != 0) && ip);
} else {
VN_HOLD(XFS_ITOV(*ipp));
ip = *ipp;
}
ITRACE(ip);
*dir_generationp = dp->i_gen;
xfs_iunlock(dp, XFS_ILOCK_EXCL);
*ipp = ip;
return 0;
}
#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.
*
* The inode passed in will have been looked up using xfs_get_dir_entry().
* Since that lookup the directory lock will have been dropped, so
* we need to validate that the inode given is still pointed to by the
* directory. We use the directory inode in memory generation count
* as an optimization to tell if a new lookup is necessary. If the
* directory no longer points to the given inode with the given name,
* then we drop the directory lock, set the entry_changed parameter to 1,
* and return. It is up to the caller to drop the reference to the inode.
*
* There is a dealock 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,
char *name,
xfs_inode_t *ip, /* inode of entry 'name' */
int dir_generation,
int *entry_changed)
{
int attempts;
xfs_ino_t e_inum;
int error;
int new_dir_gen;
xfs_inode_t *ips[2];
xfs_log_item_t *lp;
#ifdef DEBUG
xfs_rm_locks++;
#endif
attempts = 0;
again:
*entry_changed = 0;
xfs_ilock(dp, XFS_ILOCK_EXCL);
if (dp->i_gen != dir_generation) {
/*
* If the link count on the directory is 0, there are no
* entries to lock.
*/
if (dp->i_d.di_nlink == 0) {
xfs_iunlock(dp, XFS_ILOCK_EXCL);
return XFS_ERROR(ENOENT);
}
/*
* The directory has changed somehow, so do the lookup
* for the entry again. If it is changed we'll have to
* give up and return to our caller.
*/
error = xfs_dir_lookup_int(NULL, XFS_ITOBHV(dp), DLF_NODNLC,
name, NULL, &e_inum, NULL, NULL);
if (error) {
xfs_iunlock(dp, XFS_ILOCK_EXCL);
return error;
}
/*
* The entry with the given name has changed since the
* call to xfs_get_dir_entry(). Just return with
* *entry_changed set to 1 so the caller can deal with it.
*/
ASSERT(e_inum != 0);
if (e_inum != ip->i_ino) {
xfs_iunlock(dp, XFS_ILOCK_EXCL);
*entry_changed = 1;
return 0;
}
} else {
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) {
new_dir_gen = dp->i_gen;
xfs_iunlock(dp, XFS_ILOCK_EXCL);
ips[0] = ip;
ips[1] = dp;
xfs_lock_inodes(ips, 2, 0, XFS_ILOCK_EXCL);
/*
* Make sure that things are still consistent during
* the period we dropped the directory lock.
* Do a new lookup if directory was changed.
*/
if (dp->i_gen != new_dir_gen) {
/*
* If the directory has been unlinked, we're
* not going to find our entry there anymore.
*/
if (dp->i_d.di_nlink == 0) {
xfs_iunlock(dp, XFS_ILOCK_EXCL);
xfs_iunlock(ip, XFS_ILOCK_EXCL);
return XFS_ERROR(ENOENT);
}
/*
* The directory has changed somehow, so do the
* lookup for the entry again. If it is changed
* we'll have to give up and return to our caller.
*/
error = xfs_dir_lookup_int(NULL, XFS_ITOBHV(dp),
DLF_NODNLC, name, NULL, &e_inum, NULL, NULL);
if (error) {
xfs_iunlock(dp, XFS_ILOCK_EXCL);
xfs_iunlock(ip, XFS_ILOCK_EXCL);
return error;
}
if (e_inum != ip->i_ino) {
xfs_iunlock(dp, XFS_ILOCK_EXCL);
xfs_iunlock(ip, XFS_ILOCK_EXCL);
*entry_changed = 1;
return 0;
}
}
}
/* 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,
char *name,
cred_t *credp)
{
vnode_t *dir_vp;
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 dir_generation;
int entry_changed;
int dm_di_mode = 0;
int link_zero;
uint resblks;
int namelen;
/* bhv_desc_t *bdp; */
dir_vp = BHV_TO_VNODE(dir_bdp);
vn_trace_entry(dir_vp, "xfs_remove", (inst_t *)__return_address);
dp = XFS_BHVTOI(dir_bdp);
mp = dp->i_mount;
if (XFS_FORCED_SHUTDOWN(mp))
return XFS_ERROR(EIO);
namelen = strlen(name);
if (namelen >= MAXNAMELEN)
return XFS_ERROR(ENAMETOOLONG);
if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_REMOVE)) {
error = dm_send_namesp_event(DM_EVENT_REMOVE, dir_bdp, DM_RIGHT_NULL,
NULL, DM_RIGHT_NULL,
name, NULL, 0, 0, 0);
if (error)
return error;
}
/* From this point on, return through std_return */
retry:
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(dp, name, &ip, &dir_generation);
if (error) {
REMOVE_DEBUG_TRACE(__LINE__);
goto std_return;
}
dm_di_mode = ip->i_d.di_mode;
vn_trace_entry(XFS_ITOV(ip), "xfs_remove", (inst_t *)__return_address);
ITRACE(ip);
if (XFS_IS_QUOTA_ON(mp)) {
ASSERT(! error);
if (XFS_NOT_DQATTACHED(mp, dp))
error = xfs_qm_dqattach(dp, 0);
if (!error && dp != ip && XFS_NOT_DQATTACHED(mp, ip))
error = xfs_qm_dqattach(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, name, ip, dir_generation,
&entry_changed);
if (error) {
REMOVE_DEBUG_TRACE(__LINE__);
xfs_trans_cancel(tp, cancel_flags);
IRELE(ip);
goto std_return;
}
/*
* If the inode we found in the first pass is no longer
* the entry with the given name, then drop our transaction and
* inode reference and start over.
*/
if (entry_changed) {
xfs_trans_cancel(tp, cancel_flags);
IRELE(ip);
goto retry;
}
/*
* 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;
}
#if 0
if ((error = xfs_stickytest(dp, ip, credp))) {
REMOVE_DEBUG_TRACE(__LINE__);
goto error_return;
}
#endif
if ((error = xfs_pre_remove(XFS_ITOV(ip)))) {
error = XFS_ERROR(error);
REMOVE_DEBUG_TRACE(__LINE__);
goto error_return;
}
if ((ip->i_d.di_mode & IFMT) == IFDIR) {
error = XFS_ERROR(EPERM);
REMOVE_DEBUG_TRACE(__LINE__);
goto error_return;
}
/*
* Return error when removing . and ..
*/
if (name[0] == '.') {
if (name[1] == '\0') {
error = XFS_ERROR(EINVAL);
REMOVE_DEBUG_TRACE(__LINE__);
goto error_return;
}
else if (name[1] == '.' && name[2] == '\0') {
error = XFS_ERROR(EEXIST);
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), "xfs_remove",
(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) dm_send_namesp_event(DM_EVENT_POSTREMOVE,
dir_bdp, 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
*
*/
int
xfs_link(
bhv_desc_t *target_dir_bdp,
vnode_t *src_vp,
char *target_name,
cred_t *credp)
{
vnode_t *realvp;
xfs_inode_t *tdp, *sip;
xfs_ino_t e_inum;
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;
int target_namelen;
target_dir_vp = BHV_TO_VNODE(target_dir_bdp);
vn_trace_entry(target_dir_vp, "xfs_link", (inst_t *)__return_address);
target_namelen = strlen(target_name);
if (target_namelen >= MAXNAMELEN)
return XFS_ERROR(ENAMETOOLONG);
/*
* Get the real vnode.
*/
VOP_REALVP(src_vp, &realvp, error);
if (!error) {
src_vp = realvp;
}
vn_trace_entry(src_vp, "xfs_link", (inst_t *)__return_address);
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 = dm_send_namesp_event(DM_EVENT_LINK,
target_dir_bdp, DM_RIGHT_NULL,
src_bdp, DM_RIGHT_NULL,
target_name, NULL, 0, 0, 0);
if (error)
return error;
}
/* Return through std_return after this point. */
if (XFS_IS_QUOTA_ON(mp)) {
error = 0;
if (XFS_NOT_DQATTACHED(mp, sip))
error = xfs_qm_dqattach(sip, 0);
if (!error && sip != tdp && XFS_NOT_DQATTACHED(mp, tdp))
error = xfs_qm_dqattach(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 the source has been unlinked and put on the unlinked
* list, we can't link to it. Doing so would cause the inode
* to be placed on the list a second time when the link
* created here is removed.
*/
if (sip->i_d.di_nlink == 0) {
error = XFS_ERROR(ENOENT);
goto error_return;
}
/*
* If the target directory has been removed, we can't link
* any more files in it.
*/
if (tdp->i_d.di_nlink == 0) {
error = XFS_ERROR(ENOENT);
goto error_return;
}
/*
* Make sure that nothing with the given name exists in the
* target directory.
*/
error = xfs_dir_lookup_int(NULL, target_dir_bdp, DLF_NODNLC,
target_name, NULL, &e_inum, NULL, NULL);
if (error != ENOENT) {
if (error == 0) {
error = XFS_ERROR(EEXIST);
}
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) dm_send_namesp_event(DM_EVENT_POSTLINK,
target_dir_bdp, DM_RIGHT_NULL,
src_bdp, 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,
char *dir_name,
vattr_t *vap,
vnode_t **vpp,
cred_t *credp)
{
xfs_inode_t *dp;
xfs_inode_t *cdp; /* inode of created dir */
vnode_t *cvp; /* vnode of created dir */
xfs_trans_t *tp;
xfs_ino_t e_inum;
dev_t rdev;
mode_t mode;
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 = strlen(dir_name);
if (dir_namelen >= MAXNAMELEN)
return XFS_ERROR(ENAMETOOLONG);
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_dm_send_create_event(dir_bdp, dir_name,
dm_di_mode, &dm_event_sent);
if (error)
return error;
}
/* Return through std_return after this point. */
vn_trace_entry(dir_vp, "xfs_mkdir", (inst_t *)__return_address);
mp = dp->i_mount;
udqp = gdqp = NULL;
if (vap->va_mask & 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.
*/
if (XFS_IS_QUOTA_ON(mp)) {
error = xfs_qm_vop_dqalloc(mp, dp,
current->fsuid, current->fsgid,
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);
/*
* Since dp was not locked between VOP_LOOKUP and VOP_MKDIR,
* the directory could have been removed.
*/
if (dp->i_d.di_nlink == 0) {
error = XFS_ERROR(ENOENT);
goto error_return;
}
/*
* Check for directory link count overflow.
*/
if (dp->i_d.di_nlink >= XFS_MAXLINK) {
error = XFS_ERROR(EMLINK);
goto error_return;
}
/*
* Make sure that nothing with the given name exists in the
* target directory.
*/
error = xfs_dir_lookup_int(NULL, dir_bdp, DLF_NODNLC, dir_name,
NULL, &e_inum, NULL, NULL);
if (error != ENOENT) {
if (error == 0)
error = XFS_ERROR(EEXIST);
goto error_return;
}
/*
* Reserve disk quota and the inode.
*/
if (XFS_IS_QUOTA_ON(mp)) {
if (xfs_trans_reserve_quota(tp, udqp, gdqp, resblks, 1, 0)) {
error = XFS_ERROR(EDQUOT);
goto error_return;
}
}
if (resblks == 0 &&
(error = XFS_DIR_CANENTER(mp, tp, dp, dir_name, dir_namelen)))
goto error_return;
/*
* create the directory inode.
*/
rdev = (vap->va_mask & AT_RDEV) ? vap->va_rdev : NODEV;
mode = IFDIR | (vap->va_mode & ~IFMT);
error = xfs_dir_ialloc(&tp, dp, mode, 2, rdev, 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.
*/
if (XFS_IS_QUOTA_ON(mp)) {
xfs_qm_vop_dqattach_and_dqmod_newinode(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);
if (udqp)
xfs_qm_dqrele(udqp);
if (gdqp)
xfs_qm_dqrele(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) dm_send_namesp_event(DM_EVENT_POSTCREATE,
dir_bdp, DM_RIGHT_NULL,
created ? XFS_ITOBHV(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);
if (udqp)
xfs_qm_dqrele(udqp);
if (gdqp)
xfs_qm_dqrele(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,
char *name,
vnode_t *current_dir_vp,
cred_t *credp)
{
xfs_inode_t *dp;
xfs_inode_t *cdp; /* child directory */
xfs_trans_t *tp;
xfs_mount_t *mp;
/* bhv_desc_t *bdp;*/
int error;
xfs_bmap_free_t free_list;
xfs_fsblock_t first_block;
int cancel_flags;
int committed;
int dir_generation;
int entry_changed;
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);
vn_trace_entry(dir_vp, "xfs_rmdir", (inst_t *)__return_address);
if (XFS_FORCED_SHUTDOWN(XFS_BHVTOI(dir_bdp)->i_mount))
return XFS_ERROR(EIO);
namelen = strlen(name);
if (namelen >= MAXNAMELEN)
return XFS_ERROR(ENAMETOOLONG);
if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_REMOVE)) {
error = dm_send_namesp_event(DM_EVENT_REMOVE,
dir_bdp, 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. */
retry:
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(dp, name, &cdp, &dir_generation);
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.
*/
if (XFS_IS_QUOTA_ON(mp)) {
ASSERT(! error);
if (XFS_NOT_DQATTACHED(mp, dp))
error = xfs_qm_dqattach(dp, 0);
if (!error && dp != cdp && XFS_NOT_DQATTACHED(mp, cdp))
error = xfs_qm_dqattach(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, name, cdp, dir_generation,
&entry_changed);
if (error) {
xfs_trans_cancel(tp, cancel_flags);
IRELE(cdp);
goto std_return;
}
/*
* If the inode we found in the first pass is no longer
* the entry with the given name, then drop our transaction and
* inode reference and start over.
*/
if (entry_changed) {
xfs_trans_cancel(tp, cancel_flags);
IRELE(cdp);
goto retry;
}
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;
}
if ((cdp == dp) || (XFS_ITOV(cdp) == current_dir_vp)) {
error = XFS_ERROR(EINVAL);
goto error_return;
}
if ((cdp->i_d.di_mode & IFMT) != IFDIR) {
error = XFS_ERROR(ENOTDIR);
goto error_return;
}
if ((error = xfs_pre_rmdir(XFS_ITOV(cdp)))) {
error = XFS_ERROR(error);
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) dm_send_namesp_event(DM_EVENT_POSTREMOVE,
dir_bdp, 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.
*/
/*ARGSUSED*/
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), "xfs_readdir",
(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);
if ((dp->i_d.di_mode & IFMT) != IFDIR) {
xfs_iunlock_map_shared(dp, lock_mode);
return XFS_ERROR(ENOTDIR);
}
/* If the directory has been removed after it was opened. */
if (dp->i_d.di_nlink == 0) {
xfs_iunlock_map_shared(dp, lock_mode);
return 0;
}
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,
char *link_name,
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_ino_t e_inum;
dev_t rdev;
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;
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, "xfs_symlink", (inst_t *)__return_address);
mp = dp->i_mount;
if (XFS_FORCED_SHUTDOWN(mp))
return XFS_ERROR(EIO);
link_namelen = strlen(link_name);
if (link_namelen >= MAXNAMELEN)
return XFS_ERROR(ENAMETOOLONG);
/*
* 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 = dm_send_namesp_event(DM_EVENT_SYMLINK, dir_bdp, 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 & 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.
*/
if (XFS_IS_QUOTA_ON(mp)) {
error = xfs_qm_vop_dqalloc(mp, dp,
current->fsuid, current->fsgid,
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);
/*
* If the directory has been removed, then we can't create
* anything in it.
*/
if (dp->i_d.di_nlink == 0) {
error = XFS_ERROR(ENOENT);
goto error_return;
}
/*
* Since we've already started a transaction, we cannot allow
* the lookup to do a vn_get().
*/
error = xfs_dir_lookup_int(NULL, dir_bdp, DLF_NODNLC, link_name,
NULL, &e_inum, NULL, NULL);
if (error != ENOENT) {
if (!error) {
error = XFS_ERROR(EEXIST);
}
goto error_return;
}
/*
* Reserve disk quota : blocks and inode.
*/
if (XFS_IS_QUOTA_ON(mp)) {
if (xfs_trans_reserve_quota(tp, udqp, gdqp, resblks, 1, 0)) {
error = XFS_ERROR(EDQUOT);
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.
*/
rdev = (vap->va_mask & AT_RDEV) ? vap->va_rdev : NODEV;
error = xfs_dir_ialloc(&tp, dp, IFLNK | (vap->va_mode&~IFMT),
1, rdev, 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.
*/
if (XFS_IS_QUOTA_ON(mp)) {
xfs_qm_vop_dqattach_and_dqmod_newinode(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);
bcopy(target_path, ip->i_df.if_u1.if_data, 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;
bcopy(cur_chunk, XFS_BUF_PTR(bp), 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);
if (udqp)
xfs_qm_dqrele(udqp);
if (gdqp)
xfs_qm_dqrele(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) dm_send_namesp_event(DM_EVENT_POSTSYMLINK,
dir_bdp, DM_RIGHT_NULL,
error? NULL:XFS_ITOBHV(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);
if (udqp)
xfs_qm_dqrele(udqp);
if (gdqp)
xfs_qm_dqrele(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), "xfs_fid2",
(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 bcopy because the inode is a long long and there's no
* assurance that xfid->fid_ino is properly aligned.
*/
bcopy(&ip->i_ino, &xfid->fid_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;
xfs_inode_t *release_ip;
vnode_t *vp;
int error;
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.
*/
release_ip = ip->i_release;
ip->i_release = NULL;
xfs_iunlock (ip, XFS_IOLOCK_EXCL);
if (release_ip != NULL) {
VOP_RELEASE(XFS_ITOV(release_ip), error);
VN_RELE(XFS_ITOV(release_ip));
}
} else {
ASSERT((locktype == VRWLOCK_READ) ||
(locktype == VRWLOCK_WRITE_DIRECT));
xfs_iunlock(ip, XFS_IOLOCK_SHARED);
}
return;
}
/*
* xfs_seek
*
* Return an error if the new offset has overflowed and gone below
* 0 or is greater than our maximum defined file offset. Just checking
* for overflow is not enough since off_t may be an __int64_t but the
* file size may be limited to some number of bits between 32 and 64.
*/
/*ARGSUSED*/
STATIC int
xfs_seek(
bhv_desc_t *bdp,
xfs_off_t old_offset,
xfs_off_t *new_offsetp)
{
vnode_t *vp;
vp = BHV_TO_VNODE(bdp);
if (vp->v_type == VDIR)
return(0);
if ((*new_offsetp > XFS_MAX_FILE_OFFSET) ||
(*new_offsetp < 0)) {
return XFS_ERROR(EINVAL);
} else {
return 0;
}
}
#ifdef CELL_CAPABLE
/*
* xfs_allocstore
*
* This is called to reserve or allocate space for the given range.
* Currently, this only supports reserving the space for a single
* page. By using NDPP (number of BBs per page) bmbt_irec structures,
* we ensure that the entire page can be mapped in a single bmap call.
* This simplifies the back out code in that all the information we need
* to back out is in the single bmbt_irec array orig_imap.
*/
/*ARGSUSED*/
STATIC int
xfs_allocstore(
bhv_desc_t *bdp,
xfs_off_t offset,
size_t count,
cred_t *credp)
{
xfs_mount_t *mp;
xfs_inode_t *ip;
xfs_off_t isize;
xfs_fileoff_t offset_fsb;
xfs_fileoff_t last_fsb;
xfs_fileoff_t curr_off_fsb;
xfs_fileoff_t unmap_offset_fsb;
xfs_filblks_t count_fsb;
xfs_filblks_t unmap_len_fsb;
xfs_fsblock_t firstblock;
xfs_bmbt_irec_t *imapp;
xfs_bmbt_irec_t *last_imapp;
int i;
int nimaps;
int orig_nimaps;
int error;
xfs_bmbt_irec_t imap[XFS_BMAP_MAX_NMAP];
xfs_bmbt_irec_t orig_imap[NDPP];
vn_trace_entry(BHV_TO_VNODE(bdp), "xfs_allocstore",
(inst_t *)__return_address);
/*
* This code currently only works for a single page.
*/
/***
ASSERT(poff(offset) == 0);
***/
ASSERT(count == NBPP);
ip = XFS_BHVTOI(bdp);
mp = ip->i_mount;
if (XFS_FORCED_SHUTDOWN(mp))
return XFS_ERROR(EIO);
offset_fsb = XFS_B_TO_FSBT(mp, offset);
xfs_ilock(ip, XFS_ILOCK_EXCL);
/*
* Make sure that the dquots exist, and that they are attached to
* the inode. XXXwhy do we DQALLOC here? sup
*/
if (XFS_IS_QUOTA_ON(mp)) {
if (XFS_NOT_DQATTACHED(mp, ip)) {
if ((error = xfs_qm_dqattach(ip, XFS_QMOPT_DQALLOC |
XFS_QMOPT_ILOCKED))) {
xfs_iunlock(ip, XFS_ILOCK_EXCL);
return (error);
}
}
}
isize = ip->i_d.di_size;
if (offset >= isize) {
xfs_iunlock(ip, XFS_ILOCK_EXCL);
return XFS_ERROR(EINVAL);
}
if ((offset + count) > isize) {
count = isize - offset;
}
last_fsb = XFS_B_TO_FSB(mp, offset + count);
count_fsb = (xfs_filblks_t)(last_fsb - offset_fsb);
orig_nimaps = NDPP;
firstblock = NULLFSBLOCK;
error = xfs_bmapi(NULL, ip, offset_fsb, count_fsb, 0, &firstblock, 0,
orig_imap, &orig_nimaps, NULL);
if (error) {
xfs_iunlock(ip, XFS_ILOCK_EXCL);
return error;
}
ASSERT(orig_nimaps > 0);
curr_off_fsb = offset_fsb;
while (count_fsb > 0) {
nimaps = XFS_BMAP_MAX_NMAP;
firstblock = NULLFSBLOCK;
error = xfs_bmapi(NULL, ip, curr_off_fsb,
(xfs_filblks_t)(last_fsb - curr_off_fsb),
XFS_BMAPI_DELAY | XFS_BMAPI_WRITE,
&firstblock, 1, imap, &nimaps, NULL);
if (error || (nimaps == 0)) {
/*
* If we didn't get anything back, we must be
* out of space (or quota). Break out of the loop and
* back out whatever we've done so far.
* bmapi with BMAPI_DELAY can return EDQUOT.
*/
break;
}
/*
* Count up the amount of space returned.
*/
for (i = 0; i < nimaps; i++) {
ASSERT(imap[i].br_startblock != HOLESTARTBLOCK);
count_fsb -= imap[i].br_blockcount;
ASSERT(count_fsb >= 0LL);
curr_off_fsb += imap[i].br_blockcount;
ASSERT(curr_off_fsb <= last_fsb);
}
}
if (count_fsb == 0) {
/*
* We go it all, so get out of here.
*/
xfs_iunlock(ip, XFS_ILOCK_EXCL);
return 0;
}
/*
* We didn't get it all, so back out anything new that we did
* create. What we do is unmap all of the holes in the original
* map. This will do at least one unnecessary unmap, but it's
* much simpler than being exact and it still works fine since
* we hold the inode lock all along.
*
* We know we can't get errors here, since the extent list has
* already been read in and we're only removing delayed allocation
* extents.
*/
unmap_offset_fsb = offset_fsb;
imapp = &orig_imap[0];
last_imapp = &orig_imap[orig_nimaps - 1];
while (imapp <= last_imapp) {
if (unmap_offset_fsb != imapp->br_startoff) {
unmap_len_fsb = imapp->br_startoff - unmap_offset_fsb;
firstblock = NULLFSBLOCK;
(void) xfs_bunmapi(NULL, ip, unmap_offset_fsb,
unmap_len_fsb, 0, 1, &firstblock,
NULL, NULL);
}
unmap_offset_fsb = imapp->br_startoff + imapp->br_blockcount;
if (imapp == last_imapp) {
if (unmap_offset_fsb < (offset_fsb + count_fsb)) {
/*
* There is a hole after the last original
* imap, so unmap it as well.
*/
unmap_len_fsb = (offset_fsb + count_fsb) -
unmap_offset_fsb;
firstblock = NULLFSBLOCK;
(void) xfs_bunmapi(NULL, ip,
unmap_offset_fsb,
unmap_len_fsb, 0, 1,
&firstblock, NULL, NULL);
}
}
imapp++;
}
xfs_iunlock(ip, XFS_ILOCK_EXCL);
if (!error) {
error = XFS_ERROR(ENOSPC);
}
return error;
}
#endif
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,
int flag)
{
xfs_inode_t *ip;
int locked;
vnode_t *vp;
xfs_ihash_t *ih;
vp = BHV_TO_VNODE(bdp);
vn_trace_entry(vp, "xfs_reclaim", (inst_t *)__return_address);
ASSERT(!VN_MAPPED(vp));
ip = XFS_BHVTOI(bdp);
ASSERT(ip->i_iocore.io_queued_bufs >= 0);
locked = 0;
/*
* If this is not an unmount (flag == 0) and the inode's data
* still needs to be flushed, then we do not allow
* the inode to be reclaimed. This is to avoid many different
* deadlocks.
*
* Doing the VOP_FLUSHINVAL_PAGES() can cause
* us to wait in the buffer cache. We can be called here via
* vn_alloc() from xfs_iget(). We can be holding any number of
* locks at that point in the middle of a transaction, so we
* can't do anything that might need log space or the locks we
* might be holding. Flushing our buffers can require log space
* to allocate the space for delayed allocation extents underlying
* them. If the transaction we're already in has all the log
* space, then we won't be able to get any more and we'll hang.
*
* Not allowing the inode to be reclaimed if it has dirty data
* also prevents memory deadlocks where it is vhand calling here
* via the vnode shake routine. Since our dirty data might be
* delayed allocation dirty data which will require us to allocate
* memory to flush, we can't do this from vhand.
*
* It is OK to return an error here. The vnode cache will just
* come back later.
*
* XXXajs Distinguish vhand from vn_alloc and fail vhand case
* if the inode is dirty. This will prevent deadlocks where the
* process with the inode buffer locked needs memory. We can't
* always fail when the inode is dirty because then we don't
* reclaim enough. The vnode cache then grows far too large.
*/
if (!(flag & FSYNC_INVAL)) {
if (VN_DIRTY(vp) || ip->i_iocore.io_queued_bufs > 0) {
return XFS_ERROR(EAGAIN);
}
if (!xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) {
return XFS_ERROR(EAGAIN);
}
if (!xfs_iflock_nowait(ip)) {
xfs_iunlock(ip, XFS_ILOCK_EXCL);
return XFS_ERROR(EAGAIN);
}
if ((ip->i_itemp != NULL) &&
((ip->i_itemp->ili_format.ilf_fields != 0) ||
(ip->i_itemp->ili_last_fields != 0))) {
(void) xfs_iflush(ip, XFS_IFLUSH_DELWRI);
xfs_iunlock(ip, XFS_ILOCK_EXCL);
return XFS_ERROR(EAGAIN);
}
locked = 1;
}
if ((ip->i_d.di_mode & IFMT) == 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.
*/
if (locked) {
xfs_ifunlock(ip);
xfs_iunlock(ip, XFS_ILOCK_EXCL);
locked = 0;
}
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((ip->i_iocore.io_queued_bufs == 0) &&
(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((ip->i_iocore.io_queued_bufs == 0) &&
(VN_CACHED(vp) == 0));
}
}
ih = ip->i_hash;
mrupdate(&ih->ih_lock);
vn_bhv_remove(VN_BHV_HEAD(vp), XFS_ITOBHV(ip));
mrunlock(&ih->ih_lock);
if (!ip->i_update_core && (ip->i_itemp == NULL)) {
return xfs_finish_reclaim(ip, locked, 0);
}
if (locked) {
xfs_ifunlock(ip);
xfs_iunlock(ip, XFS_ILOCK_EXCL);
}
return 0;
}
int
xfs_finish_reclaim(
xfs_inode_t *ip,
int locked,
int from_umount)
{
int error;
xfs_ihash_t *ih = ip->i_hash;
int sync_mode;
if (!locked) {
xfs_ilock(ip, XFS_ILOCK_EXCL);
}
mrupdate(&ih->ih_lock);
if (XFS_ITOV_NULL(ip)) {
mrunlock(&ih->ih_lock);
if (!locked)
xfs_iunlock(ip, XFS_ILOCK_EXCL);
return(0);
}
if (ip->i_flags & XFS_IRECLAIM) {
if (!locked)
xfs_iunlock(ip, XFS_ILOCK_EXCL);
mrunlock(&ih->ih_lock);
return(1);
}
ip->i_flags |= XFS_IRECLAIM;
mrunlock(&ih->ih_lock);
sync_mode = from_umount ? XFS_IFLUSH_ASYNC :
XFS_IFLUSH_DELWRI_ELSE_SYNC;
/*
* 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_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 */
}
xfs_iunlock(ip, XFS_ILOCK_EXCL);
ASSERT(ip->i_update_core == 0);
ASSERT(ip->i_itemp == NULL ||
ip->i_itemp->ili_format.ilf_fields == 0);
ASSERT(ip->i_iocore.io_queued_bufs == 0);
} else {
xfs_iunlock(ip, XFS_ILOCK_EXCL);
}
xfs_ireclaim(ip);
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), "xfs_alloc_file_space",
(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 = (ip->i_d.di_flags & XFS_DIFLAG_REALTIME)) != 0) {
if (ip->i_d.di_extsize)
rtextsize = ip->i_d.di_extsize;
else
rtextsize = mp->m_sb.sb_rextsize;
} else
rtextsize = 0;
if (XFS_IS_QUOTA_ON(mp)) {
if (XFS_NOT_DQATTACHED(mp, ip)) {
if ((error = xfs_qm_dqattach(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_dm_send_data_event(DM_EVENT_WRITE, XFS_ITOBHV(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);
if (XFS_IS_QUOTA_ON(mp)) {
if (xfs_trans_reserve_quota(tp,
ip->i_udquot,
ip->i_gdquot,
resblks, 0, 0)) {
error = XFS_ERROR(EDQUOT);
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 = dm_send_namesp_event(DM_EVENT_NOSPACE,
XFS_ITOBHV(ip), DM_RIGHT_NULL,
XFS_ITOBHV(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 = xfs_dm_send_data_event result. */
}
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_buf_t *bp;
int error=0;
xfs_bmbt_irec_t imap;
xfs_off_t lastoffset;
xfs_mount_t *mp;
int nimap;
xfs_off_t offset;
xfs_fileoff_t offset_fsb;
mp = ip->i_mount;
bp = XFS_ngetrbuf(mp->m_sb.sb_blocksize,mp);
ASSERT(!XFS_BUF_GETERROR(bp));
if (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) {
XFS_BUF_SET_TARGET(bp, &mp->m_rtdev_targ);
} else {
XFS_BUF_SET_TARGET(bp, 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;
}
bzero(XFS_BUF_PTR(bp) +
(offset - XFS_FSB_TO_B(mp, imap.br_startoff)),
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_nfreerbuf(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 specrt;
xfs_fileoff_t startoffset_fsb;
xfs_trans_t *tp;
vn_trace_entry(XFS_ITOV(ip), "xfs_free_file_space",
(inst_t *)__return_address);
mp = ip->i_mount;
if (XFS_IS_QUOTA_ON(mp)) {
if (XFS_NOT_DQATTACHED(mp, ip)) {
if ((error = xfs_qm_dqattach(ip, 0)))
return error;
}
}
error = 0;
if (len <= 0) /* if nothing being freed */
return error;
specrt =
(ip->i_d.di_flags & XFS_DIFLAG_REALTIME) &&
!XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb);
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_dm_send_data_event(DM_EVENT_WRITE, XFS_ITOBHV(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, ilen, NULL);
/*
* Need to zero the stuff we're not freeing, on disk.
* If its specrt (realtime & 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 (specrt) {
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);
if (XFS_IS_QUOTA_ON(mp)) {
if (xfs_trans_reserve_quota(tp,
ip->i_udquot,
ip->i_gdquot,
resblks, 0, 0)) {
error = XFS_ERROR(EDQUOT);
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, "xfs_change_file_space",
(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, IWRITE, 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_MAX_FILE_OFFSET)
|| (bf->l_start + llen < 0)
|| (bf->l_start + llen > XFS_MAX_FILE_OFFSET))
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 = 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 &= ~ISUID;
/*
* Note that we don't have to worry about mandatory
* file locking being disabled here because we only
* clear the 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 & (IEXEC >> 3))
ip->i_d.di_mode &= ~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 = {
#ifdef CELL_CAPABLE
vop_open: BHV_IDENTITY_INIT(VN_BHV_XFS,VNODE_POSITION_BASE),
#endif
vop_open: xfs_open,
vop_close: xfs_close,
vop_read: (vop_read_t)xfs_read,
vop_write: (vop_write_t)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_seek: xfs_seek,
vop_realvp: (vop_realvp_t)fs_nosys,
vop_bmap: (vop_bmap_t)xfs_bmap,
vop_strategy: (vop_strategy_t)xfs_strategy,
#ifdef CELL_CAPABLE
vop_allocstore: xfs_allocstore,
#endif
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: fs_vnode_change,
vop_tosspages: fs_tosspages,
vop_flushinval_pages: fs_flushinval_pages,
vop_flush_pages: fs_flush_pages,
vop_pages_sethole: fs_pages_sethole,
vop_release: xfs_release,
};
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