/*
* Starting at @id and progressing upwards, look for an initialized incore
* dquot, lock it, and return it.
*/
int
xfs_qm_dqget_next(
struct xfs_mount *mp,
xfs_dqid_t id,
uint type,
struct xfs_dquot **dqpp)
{
struct xfs_dquot *dqp;
int error = 0;
*dqpp = NULL;
for (; !error; error = xfs_dq_get_next_id(mp, type, &id)) {
error = xfs_qm_dqget(mp, id, type, false, &dqp);
if (error == -ENOENT)
continue;
else if (error != 0)
break;
if (!XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
*dqpp = dqp;
return 0;
}
xfs_qm_dqput(dqp);
}
return error;
}
int
xfs_qm_scall_getquota(
xfs_mount_t *mp,
xfs_dqid_t id,
uint type,
fs_disk_quota_t *out)
{
xfs_dquot_t *dqp;
int error;
/*
* Try to get the dquot. We don't want it allocated on disk, so
* we aren't passing the XFS_QMOPT_DOALLOC flag. If it doesn't
* exist, we'll get ENOENT back.
*/
if ((error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp))) {
return (error);
}
/*
* If everything's NULL, this dquot doesn't quite exist as far as
* our utility programs are concerned.
*/
if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
xfs_qm_dqput(dqp);
return XFS_ERROR(ENOENT);
}
/* xfs_qm_dqprint(dqp); */
/*
* Convert the disk dquot to the exportable format
*/
xfs_qm_export_dquot(mp, &dqp->q_core, out);
xfs_qm_dqput(dqp);
return (error ? XFS_ERROR(EFAULT) : 0);
}
int
xfs_qm_scall_getquota(
struct xfs_mount *mp,
xfs_dqid_t id,
uint type,
struct qc_dqblk *dst)
{
struct xfs_dquot *dqp;
int error;
/*
* Try to get the dquot. We don't want it allocated on disk, so
* we aren't passing the XFS_QMOPT_DOALLOC flag. If it doesn't
* exist, we'll get ENOENT back.
*/
error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp);
if (error)
return error;
/*
* If everything's NULL, this dquot doesn't quite exist as far as
* our utility programs are concerned.
*/
if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
error = XFS_ERROR(ENOENT);
goto out_put;
}
memset(dst, 0, sizeof(*dst));
dst->d_spc_hardlimit =
XFS_FSB_TO_B(mp, be64_to_cpu(dqp->q_core.d_blk_hardlimit));
dst->d_spc_softlimit =
XFS_FSB_TO_B(mp, be64_to_cpu(dqp->q_core.d_blk_softlimit));
dst->d_ino_hardlimit = be64_to_cpu(dqp->q_core.d_ino_hardlimit);
dst->d_ino_softlimit = be64_to_cpu(dqp->q_core.d_ino_softlimit);
dst->d_space = XFS_FSB_TO_B(mp, dqp->q_res_bcount);
dst->d_ino_count = dqp->q_res_icount;
dst->d_spc_timer = be32_to_cpu(dqp->q_core.d_btimer);
dst->d_ino_timer = be32_to_cpu(dqp->q_core.d_itimer);
dst->d_ino_warns = be16_to_cpu(dqp->q_core.d_iwarns);
dst->d_spc_warns = be16_to_cpu(dqp->q_core.d_bwarns);
dst->d_rt_spc_hardlimit =
XFS_FSB_TO_B(mp, be64_to_cpu(dqp->q_core.d_rtb_hardlimit));
dst->d_rt_spc_softlimit =
XFS_FSB_TO_B(mp, be64_to_cpu(dqp->q_core.d_rtb_softlimit));
dst->d_rt_space = XFS_FSB_TO_B(mp, dqp->q_res_rtbcount);
dst->d_rt_spc_timer = be32_to_cpu(dqp->q_core.d_rtbtimer);
dst->d_rt_spc_warns = be16_to_cpu(dqp->q_core.d_rtbwarns);
/*
* Internally, we don't reset all the timers when quota enforcement
* gets turned off. No need to confuse the user level code,
* so return zeroes in that case.
*/
if ((!XFS_IS_UQUOTA_ENFORCED(mp) &&
dqp->q_core.d_flags == XFS_DQ_USER) ||
(!XFS_IS_GQUOTA_ENFORCED(mp) &&
dqp->q_core.d_flags == XFS_DQ_GROUP) ||
(!XFS_IS_PQUOTA_ENFORCED(mp) &&
dqp->q_core.d_flags == XFS_DQ_PROJ)) {
dst->d_spc_timer = 0;
dst->d_ino_timer = 0;
dst->d_rt_spc_timer = 0;
}
#ifdef DEBUG
if (((XFS_IS_UQUOTA_ENFORCED(mp) && type == XFS_DQ_USER) ||
(XFS_IS_GQUOTA_ENFORCED(mp) && type == XFS_DQ_GROUP) ||
(XFS_IS_PQUOTA_ENFORCED(mp) && type == XFS_DQ_PROJ)) &&
id != 0) {
if ((dst->d_space > dst->d_spc_softlimit) &&
(dst->d_spc_softlimit > 0)) {
ASSERT(dst->d_spc_timer != 0);
}
if ((dst->d_ino_count > dst->d_ino_softlimit) &&
(dst->d_ino_softlimit > 0)) {
ASSERT(dst->d_ino_timer != 0);
}
}
#endif
out_put:
xfs_qm_dqput(dqp);
return error;
}
/*
* Given the file system, inode OR id, and type (UDQUOT/GDQUOT), return a
* a locked dquot, doing an allocation (if requested) as needed.
* When both an inode and an id are given, the inode's id takes precedence.
* That is, if the id changes while we don't hold the ilock inside this
* function, the new dquot is returned, not necessarily the one requested
* in the id argument.
*/
int
xfs_qm_dqget(
xfs_mount_t *mp,
xfs_inode_t *ip, /* locked inode (optional) */
xfs_dqid_t id, /* uid/projid/gid depending on type */
uint type, /* XFS_DQ_USER/XFS_DQ_PROJ/XFS_DQ_GROUP */
uint flags, /* DQALLOC, DQSUSER, DQREPAIR, DOWARN */
xfs_dquot_t **O_dqpp) /* OUT : locked incore dquot */
{
struct xfs_quotainfo *qi = mp->m_quotainfo;
struct radix_tree_root *tree = xfs_dquot_tree(qi, type);
struct xfs_dquot *dqp;
int error;
ASSERT(XFS_IS_QUOTA_RUNNING(mp));
if ((! XFS_IS_UQUOTA_ON(mp) && type == XFS_DQ_USER) ||
(! XFS_IS_PQUOTA_ON(mp) && type == XFS_DQ_PROJ) ||
(! XFS_IS_GQUOTA_ON(mp) && type == XFS_DQ_GROUP)) {
return -ESRCH;
}
ASSERT(type == XFS_DQ_USER ||
type == XFS_DQ_PROJ ||
type == XFS_DQ_GROUP);
if (ip) {
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
ASSERT(xfs_inode_dquot(ip, type) == NULL);
}
restart:
mutex_lock(&qi->qi_tree_lock);
dqp = radix_tree_lookup(tree, id);
if (dqp) {
xfs_dqlock(dqp);
if (dqp->dq_flags & XFS_DQ_FREEING) {
xfs_dqunlock(dqp);
mutex_unlock(&qi->qi_tree_lock);
trace_xfs_dqget_freeing(dqp);
delay(1);
goto restart;
}
/* uninit / unused quota found in radix tree, keep looking */
if (flags & XFS_QMOPT_DQNEXT) {
if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
xfs_dqunlock(dqp);
mutex_unlock(&qi->qi_tree_lock);
error = xfs_dq_get_next_id(mp, type, &id);
if (error)
return error;
goto restart;
}
}
dqp->q_nrefs++;
mutex_unlock(&qi->qi_tree_lock);
trace_xfs_dqget_hit(dqp);
XFS_STATS_INC(mp, xs_qm_dqcachehits);
*O_dqpp = dqp;
return 0;
}
mutex_unlock(&qi->qi_tree_lock);
XFS_STATS_INC(mp, xs_qm_dqcachemisses);
/*
* Dquot cache miss. We don't want to keep the inode lock across
* a (potential) disk read. Also we don't want to deal with the lock
* ordering between quotainode and this inode. OTOH, dropping the inode
* lock here means dealing with a chown that can happen before
* we re-acquire the lock.
*/
if (ip)
xfs_iunlock(ip, XFS_ILOCK_EXCL);
error = xfs_qm_dqread(mp, id, type, flags, &dqp);
if (ip)
xfs_ilock(ip, XFS_ILOCK_EXCL);
/* If we are asked to find next active id, keep looking */
if (error == -ENOENT && (flags & XFS_QMOPT_DQNEXT)) {
error = xfs_dq_get_next_id(mp, type, &id);
if (!error)
goto restart;
}
if (error)
return error;
if (ip) {
/*
* A dquot could be attached to this inode by now, since
* we had dropped the ilock.
*/
if (xfs_this_quota_on(mp, type)) {
struct xfs_dquot *dqp1;
dqp1 = xfs_inode_dquot(ip, type);
if (dqp1) {
xfs_qm_dqdestroy(dqp);
dqp = dqp1;
xfs_dqlock(dqp);
goto dqret;
}
} else {
/* inode stays locked on return */
xfs_qm_dqdestroy(dqp);
return -ESRCH;
}
}
mutex_lock(&qi->qi_tree_lock);
error = radix_tree_insert(tree, id, dqp);
if (unlikely(error)) {
WARN_ON(error != -EEXIST);
/*
* Duplicate found. Just throw away the new dquot and start
* over.
*/
mutex_unlock(&qi->qi_tree_lock);
trace_xfs_dqget_dup(dqp);
xfs_qm_dqdestroy(dqp);
XFS_STATS_INC(mp, xs_qm_dquot_dups);
goto restart;
}
/*
* We return a locked dquot to the caller, with a reference taken
*/
xfs_dqlock(dqp);
dqp->q_nrefs = 1;
qi->qi_dquots++;
mutex_unlock(&qi->qi_tree_lock);
/* If we are asked to find next active id, keep looking */
if (flags & XFS_QMOPT_DQNEXT) {
if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
xfs_qm_dqput(dqp);
error = xfs_dq_get_next_id(mp, type, &id);
if (error)
return error;
goto restart;
}
}
dqret:
ASSERT((ip == NULL) || xfs_isilocked(ip, XFS_ILOCK_EXCL));
trace_xfs_dqget_miss(dqp);
*O_dqpp = dqp;
return 0;
}
int
xfs_qm_scall_getquota(
struct xfs_mount *mp,
xfs_dqid_t id,
uint type,
struct fs_disk_quota *dst)
{
struct xfs_dquot *dqp;
int error;
error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp);
if (error)
return error;
if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
error = XFS_ERROR(ENOENT);
goto out_put;
}
memset(dst, 0, sizeof(*dst));
dst->d_version = FS_DQUOT_VERSION;
dst->d_flags = xfs_qm_export_qtype_flags(dqp->q_core.d_flags);
dst->d_id = be32_to_cpu(dqp->q_core.d_id);
dst->d_blk_hardlimit =
XFS_FSB_TO_BB(mp, be64_to_cpu(dqp->q_core.d_blk_hardlimit));
dst->d_blk_softlimit =
XFS_FSB_TO_BB(mp, be64_to_cpu(dqp->q_core.d_blk_softlimit));
dst->d_ino_hardlimit = be64_to_cpu(dqp->q_core.d_ino_hardlimit);
dst->d_ino_softlimit = be64_to_cpu(dqp->q_core.d_ino_softlimit);
dst->d_bcount = XFS_FSB_TO_BB(mp, dqp->q_res_bcount);
dst->d_icount = dqp->q_res_icount;
dst->d_btimer = be32_to_cpu(dqp->q_core.d_btimer);
dst->d_itimer = be32_to_cpu(dqp->q_core.d_itimer);
dst->d_iwarns = be16_to_cpu(dqp->q_core.d_iwarns);
dst->d_bwarns = be16_to_cpu(dqp->q_core.d_bwarns);
dst->d_rtb_hardlimit =
XFS_FSB_TO_BB(mp, be64_to_cpu(dqp->q_core.d_rtb_hardlimit));
dst->d_rtb_softlimit =
XFS_FSB_TO_BB(mp, be64_to_cpu(dqp->q_core.d_rtb_softlimit));
dst->d_rtbcount = XFS_FSB_TO_BB(mp, dqp->q_res_rtbcount);
dst->d_rtbtimer = be32_to_cpu(dqp->q_core.d_rtbtimer);
dst->d_rtbwarns = be16_to_cpu(dqp->q_core.d_rtbwarns);
if ((!XFS_IS_UQUOTA_ENFORCED(mp) && dqp->q_core.d_flags == XFS_DQ_USER) ||
(!XFS_IS_OQUOTA_ENFORCED(mp) &&
(dqp->q_core.d_flags & (XFS_DQ_PROJ | XFS_DQ_GROUP)))) {
dst->d_btimer = 0;
dst->d_itimer = 0;
dst->d_rtbtimer = 0;
}
#ifdef DEBUG
if (((XFS_IS_UQUOTA_ENFORCED(mp) && dst->d_flags == FS_USER_QUOTA) ||
(XFS_IS_OQUOTA_ENFORCED(mp) &&
(dst->d_flags & (FS_PROJ_QUOTA | FS_GROUP_QUOTA)))) &&
dst->d_id != 0) {
if (((int) dst->d_bcount > (int) dst->d_blk_softlimit) &&
(dst->d_blk_softlimit > 0)) {
ASSERT(dst->d_btimer != 0);
}
if (((int) dst->d_icount > (int) dst->d_ino_softlimit) &&
(dst->d_ino_softlimit > 0)) {
ASSERT(dst->d_itimer != 0);
}
}
#endif
out_put:
xfs_qm_dqput(dqp);
return error;
}
