int
xfs_qm_vop_rename_dqattach(
struct xfs_inode **i_tab)
{
struct xfs_mount *mp = i_tab[0]->i_mount;
int i;
if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
return 0;
for (i = 0; (i < 4 && i_tab[i]); i++) {
struct xfs_inode *ip = i_tab[i];
int error;
/*
* Watch out for duplicate entries in the table.
*/
if (i == 0 || ip != i_tab[i-1]) {
if (XFS_NOT_DQATTACHED(mp, ip)) {
error = xfs_qm_dqattach(ip, 0);
if (error)
return error;
}
}
}
return 0;
}
static bool
xfs_qm_need_dqattach(
struct xfs_inode *ip)
{
struct xfs_mount *mp = ip->i_mount;
if (!XFS_IS_QUOTA_RUNNING(mp))
return false;
if (!XFS_IS_QUOTA_ON(mp))
return false;
if (!XFS_NOT_DQATTACHED(mp, ip))
return false;
if (xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
return false;
return true;
}
static bool
xfs_qm_need_dqattach(
struct xfs_inode *ip)
{
struct xfs_mount *mp = ip->i_mount;
if (!XFS_IS_QUOTA_RUNNING(mp))
return false;
if (!XFS_IS_QUOTA_ON(mp))
return false;
if (!XFS_NOT_DQATTACHED(mp, ip))
return false;
if (ip->i_ino == mp->m_sb.sb_uquotino ||
ip->i_ino == mp->m_sb.sb_gquotino)
return false;
return true;
}
/*
* Given an inode, a uid, gid and prid make sure that we have
* allocated relevant dquot(s) on disk, and that we won't exceed inode
* quotas by creating this file.
* This also attaches dquot(s) to the given inode after locking it,
* and returns the dquots corresponding to the uid and/or gid.
*
* in : inode (unlocked)
* out : udquot, gdquot with references taken and unlocked
*/
int
xfs_qm_vop_dqalloc(
struct xfs_inode *ip,
uid_t uid,
gid_t gid,
prid_t prid,
uint flags,
struct xfs_dquot **O_udqpp,
struct xfs_dquot **O_gdqpp)
{
struct xfs_mount *mp = ip->i_mount;
struct xfs_dquot *uq, *gq;
int error;
uint lockflags;
if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
return 0;
lockflags = XFS_ILOCK_EXCL;
xfs_ilock(ip, lockflags);
if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
gid = ip->i_d.di_gid;
/*
* Attach the dquot(s) to this inode, doing a dquot allocation
* if necessary. The dquot(s) will not be locked.
*/
if (XFS_NOT_DQATTACHED(mp, ip)) {
error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC);
if (error) {
xfs_iunlock(ip, lockflags);
return error;
}
}
uq = gq = NULL;
if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
if (ip->i_d.di_uid != uid) {
/*
* What we need is the dquot that has this uid, and
* if we send the inode to dqget, the uid of the inode
* takes priority over what's sent in the uid argument.
* We must unlock inode here before calling dqget if
* we're not sending the inode, because otherwise
* we'll deadlock by doing trans_reserve while
* holding ilock.
*/
xfs_iunlock(ip, lockflags);
if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t) uid,
XFS_DQ_USER,
XFS_QMOPT_DQALLOC |
XFS_QMOPT_DOWARN,
&uq))) {
ASSERT(error != ENOENT);
return error;
}
/*
* Get the ilock in the right order.
*/
xfs_dqunlock(uq);
lockflags = XFS_ILOCK_SHARED;
xfs_ilock(ip, lockflags);
} else {
/*
* Take an extra reference, because we'll return
* this to caller
*/
ASSERT(ip->i_udquot);
uq = xfs_qm_dqhold(ip->i_udquot);
}
}
if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
if (ip->i_d.di_gid != gid) {
xfs_iunlock(ip, lockflags);
if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)gid,
XFS_DQ_GROUP,
XFS_QMOPT_DQALLOC |
XFS_QMOPT_DOWARN,
&gq))) {
if (uq)
xfs_qm_dqrele(uq);
ASSERT(error != ENOENT);
return error;
}
xfs_dqunlock(gq);
lockflags = XFS_ILOCK_SHARED;
xfs_ilock(ip, lockflags);
} else {
ASSERT(ip->i_gdquot);
gq = xfs_qm_dqhold(ip->i_gdquot);
}
} else if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
if (xfs_get_projid(ip) != prid) {
xfs_iunlock(ip, lockflags);
if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
XFS_DQ_PROJ,
XFS_QMOPT_DQALLOC |
XFS_QMOPT_DOWARN,
&gq))) {
if (uq)
xfs_qm_dqrele(uq);
ASSERT(error != ENOENT);
return (error);
}
xfs_dqunlock(gq);
lockflags = XFS_ILOCK_SHARED;
xfs_ilock(ip, lockflags);
} else {
ASSERT(ip->i_gdquot);
gq = xfs_qm_dqhold(ip->i_gdquot);
}
}
if (uq)
trace_xfs_dquot_dqalloc(ip);
xfs_iunlock(ip, lockflags);
if (O_udqpp)
*O_udqpp = uq;
else if (uq)
xfs_qm_dqrele(uq);
if (O_gdqpp)
*O_gdqpp = gq;
else if (gq)
xfs_qm_dqrele(gq);
return 0;
}
int
xfs_attr_inactive(xfs_inode_t *dp)
{
xfs_trans_t *trans;
xfs_mount_t *mp;
int error;
mp = dp->i_mount;
ASSERT(! XFS_NOT_DQATTACHED(mp, dp));
xfs_ilock(dp, XFS_ILOCK_SHARED);
if (!xfs_inode_hasattr(dp) ||
dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) {
xfs_iunlock(dp, XFS_ILOCK_SHARED);
return 0;
}
xfs_iunlock(dp, XFS_ILOCK_SHARED);
/*
* Start our first transaction of the day.
*
* All future transactions during this code must be "chained" off
* this one via the trans_dup() call. All transactions will contain
* the inode, and the inode will always be marked with trans_ihold().
* Since the inode will be locked in all transactions, we must log
* the inode in every transaction to let it float upward through
* the log.
*/
trans = xfs_trans_alloc(mp, XFS_TRANS_ATTRINVAL);
error = xfs_trans_reserve(trans, &M_RES(mp)->tr_attrinval, 0, 0);
if (error) {
xfs_trans_cancel(trans, 0);
return error;
}
xfs_ilock(dp, XFS_ILOCK_EXCL);
/*
* No need to make quota reservations here. We expect to release some
* blocks, not allocate, in the common case.
*/
xfs_trans_ijoin(trans, dp, 0);
/*
* Decide on what work routines to call based on the inode size.
*/
if (!xfs_inode_hasattr(dp) ||
dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) {
error = 0;
goto out;
}
error = xfs_attr3_root_inactive(&trans, dp);
if (error)
goto out;
error = xfs_itruncate_extents(&trans, dp, XFS_ATTR_FORK, 0);
if (error)
goto out;
error = xfs_trans_commit(trans, XFS_TRANS_RELEASE_LOG_RES);
xfs_iunlock(dp, XFS_ILOCK_EXCL);
return error;
out:
xfs_trans_cancel(trans, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT);
xfs_iunlock(dp, XFS_ILOCK_EXCL);
return error;
}
/*
* xfs_attr_inactive kills all traces of an attribute fork on an inode. It
* removes both the on-disk and in-memory inode fork. Note that this also has to
* handle the condition of inodes without attributes but with an attribute fork
* configured, so we can't use xfs_inode_hasattr() here.
*
* The in-memory attribute fork is removed even on error.
*/
int
xfs_attr_inactive(
struct xfs_inode *dp)
{
struct xfs_trans *trans;
struct xfs_mount *mp;
int cancel_flags = 0;
int lock_mode = XFS_ILOCK_SHARED;
int error = 0;
mp = dp->i_mount;
ASSERT(! XFS_NOT_DQATTACHED(mp, dp));
xfs_ilock(dp, lock_mode);
if (!XFS_IFORK_Q(dp))
goto out_destroy_fork;
xfs_iunlock(dp, lock_mode);
/*
* Start our first transaction of the day.
*
* All future transactions during this code must be "chained" off
* this one via the trans_dup() call. All transactions will contain
* the inode, and the inode will always be marked with trans_ihold().
* Since the inode will be locked in all transactions, we must log
* the inode in every transaction to let it float upward through
* the log.
*/
lock_mode = 0;
trans = xfs_trans_alloc(mp, XFS_TRANS_ATTRINVAL);
error = xfs_trans_reserve(trans, &M_RES(mp)->tr_attrinval, 0, 0);
if (error)
goto out_cancel;
lock_mode = XFS_ILOCK_EXCL;
cancel_flags = XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT;
xfs_ilock(dp, lock_mode);
if (!XFS_IFORK_Q(dp))
goto out_cancel;
/*
* No need to make quota reservations here. We expect to release some
* blocks, not allocate, in the common case.
*/
xfs_trans_ijoin(trans, dp, 0);
/*
* Invalidate and truncate the attribute fork extents. Make sure the
* fork actually has attributes as otherwise the invalidation has no
* blocks to read and returns an error. In this case, just do the fork
* removal below.
*/
if (xfs_inode_hasattr(dp) &&
dp->i_d.di_aformat != XFS_DINODE_FMT_LOCAL) {
error = xfs_attr3_root_inactive(&trans, dp);
if (error)
goto out_cancel;
error = xfs_itruncate_extents(&trans, dp, XFS_ATTR_FORK, 0);
if (error)
goto out_cancel;
}
/* Reset the attribute fork - this also destroys the in-core fork */
xfs_attr_fork_remove(dp, trans);
error = xfs_trans_commit(trans, XFS_TRANS_RELEASE_LOG_RES);
xfs_iunlock(dp, lock_mode);
return error;
out_cancel:
xfs_trans_cancel(trans, cancel_flags);
out_destroy_fork:
/* kill the in-core attr fork before we drop the inode lock */
if (dp->i_afp)
xfs_idestroy_fork(dp, XFS_ATTR_FORK);
if (lock_mode)
xfs_iunlock(dp, lock_mode);
return error;
}
