Disabling quota accounting is hairy, racy code with all kinds of pitfalls.
And it has a very strange mind set, as quota accounting (unlike
enforcement) really is a property of the on-disk format. There is no good
use case for supporting this.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Carlos Maiolino <cmaiolino@xxxxxxxxxx>
---
fs/xfs/libxfs/xfs_trans_resv.c | 30 ----
fs/xfs/libxfs/xfs_trans_resv.h | 2 -
fs/xfs/xfs_dquot_item.c | 134 ------------------
fs/xfs/xfs_dquot_item.h | 17 ---
fs/xfs/xfs_qm.c | 2 +-
fs/xfs/xfs_qm.h | 3 -
fs/xfs/xfs_qm_syscalls.c | 241 ++-------------------------------
fs/xfs/xfs_trans_dquot.c | 38 ------
8 files changed, 13 insertions(+), 454 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_trans_resv.c b/fs/xfs/libxfs/xfs_trans_resv.c
index d1a0848cb52eca..ce12c8142bd18e 100644
--- a/fs/xfs/libxfs/xfs_trans_resv.c
+++ b/fs/xfs/libxfs/xfs_trans_resv.c
@@ -798,29 +798,6 @@ xfs_calc_qm_dqalloc_reservation(
XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB) - 1);
}
-/*
- * Turning off quotas.
- * the quota off logitems: sizeof(struct xfs_qoff_logitem) * 2
- * the superblock for the quota flags: sector size
- */
-STATIC uint
-xfs_calc_qm_quotaoff_reservation(
- struct xfs_mount *mp)
-{
- return sizeof(struct xfs_qoff_logitem) * 2 +
- xfs_calc_buf_res(1, mp->m_sb.sb_sectsize);
-}
-
-/*
- * End of turning off quotas.
- * the quota off logitems: sizeof(struct xfs_qoff_logitem) * 2
- */
-STATIC uint
-xfs_calc_qm_quotaoff_end_reservation(void)
-{
- return sizeof(struct xfs_qoff_logitem) * 2;
-}
-
/*
* Syncing the incore super block changes to disk.
* the super block to reflect the changes: sector size
@@ -923,13 +900,6 @@ xfs_trans_resv_calc(
resp->tr_qm_setqlim.tr_logres = xfs_calc_qm_setqlim_reservation();
resp->tr_qm_setqlim.tr_logcount = XFS_DEFAULT_LOG_COUNT;
- resp->tr_qm_quotaoff.tr_logres = xfs_calc_qm_quotaoff_reservation(mp);
- resp->tr_qm_quotaoff.tr_logcount = XFS_DEFAULT_LOG_COUNT;
-
- resp->tr_qm_equotaoff.tr_logres =
- xfs_calc_qm_quotaoff_end_reservation();
- resp->tr_qm_equotaoff.tr_logcount = XFS_DEFAULT_LOG_COUNT;
-
resp->tr_sb.tr_logres = xfs_calc_sb_reservation(mp);
resp->tr_sb.tr_logcount = XFS_DEFAULT_LOG_COUNT;
diff --git a/fs/xfs/libxfs/xfs_trans_resv.h b/fs/xfs/libxfs/xfs_trans_resv.h
index 7241ab28cf84fe..fc4e9b369a3ae6 100644
--- a/fs/xfs/libxfs/xfs_trans_resv.h
+++ b/fs/xfs/libxfs/xfs_trans_resv.h
@@ -46,8 +46,6 @@ struct xfs_trans_resv {
struct xfs_trans_res tr_growrtfree; /* grow realtime freeing */
struct xfs_trans_res tr_qm_setqlim; /* adjust quota limits */
struct xfs_trans_res tr_qm_dqalloc; /* allocate quota on disk */
- struct xfs_trans_res tr_qm_quotaoff; /* turn quota off */
- struct xfs_trans_res tr_qm_equotaoff;/* end of turn quota off */
struct xfs_trans_res tr_sb; /* modify superblock */
struct xfs_trans_res tr_fsyncts; /* update timestamps on fsync */
};
diff --git a/fs/xfs/xfs_dquot_item.c b/fs/xfs/xfs_dquot_item.c
index 8ed47b739b6ccc..6a1aae799cf16d 100644
--- a/fs/xfs/xfs_dquot_item.c
+++ b/fs/xfs/xfs_dquot_item.c
@@ -218,137 +218,3 @@ xfs_qm_dquot_logitem_init(
&xfs_dquot_item_ops);
lp->qli_dquot = dqp;
}
-
-/*------------------ QUOTAOFF LOG ITEMS -------------------*/
-
-static inline struct xfs_qoff_logitem *QOFF_ITEM(struct xfs_log_item *lip)
-{
- return container_of(lip, struct xfs_qoff_logitem, qql_item);
-}
-
-
-/*
- * This returns the number of iovecs needed to log the given quotaoff item.
- * We only need 1 iovec for an quotaoff item. It just logs the
- * quotaoff_log_format structure.
- */
-STATIC void
-xfs_qm_qoff_logitem_size(
- struct xfs_log_item *lip,
- int *nvecs,
- int *nbytes)
-{
- *nvecs += 1;
- *nbytes += sizeof(struct xfs_qoff_logitem);
-}
-
-STATIC void
-xfs_qm_qoff_logitem_format(
- struct xfs_log_item *lip,
- struct xfs_log_vec *lv)
-{
- struct xfs_qoff_logitem *qflip = QOFF_ITEM(lip);
- struct xfs_log_iovec *vecp = NULL;
- struct xfs_qoff_logformat *qlf;
-
- qlf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_QUOTAOFF);
- qlf->qf_type = XFS_LI_QUOTAOFF;
- qlf->qf_size = 1;
- qlf->qf_flags = qflip->qql_flags;
- xlog_finish_iovec(lv, vecp, sizeof(struct xfs_qoff_logitem));
-}
-
-/*
- * There isn't much you can do to push a quotaoff item. It is simply
- * stuck waiting for the log to be flushed to disk.
- */
-STATIC uint
-xfs_qm_qoff_logitem_push(
- struct xfs_log_item *lip,
- struct list_head *buffer_list)
-{
- return XFS_ITEM_LOCKED;
-}
-
-STATIC xfs_lsn_t
-xfs_qm_qoffend_logitem_committed(
- struct xfs_log_item *lip,
- xfs_lsn_t lsn)
-{
- struct xfs_qoff_logitem *qfe = QOFF_ITEM(lip);
- struct xfs_qoff_logitem *qfs = qfe->qql_start_lip;
-
- xfs_qm_qoff_logitem_relse(qfs);
-
- kmem_free(lip->li_lv_shadow);
- kmem_free(qfe);
- return (xfs_lsn_t)-1;
-}
-
-STATIC void
-xfs_qm_qoff_logitem_release(
- struct xfs_log_item *lip)
-{
- struct xfs_qoff_logitem *qoff = QOFF_ITEM(lip);
-
- if (test_bit(XFS_LI_ABORTED, &lip->li_flags)) {
- if (qoff->qql_start_lip)
- xfs_qm_qoff_logitem_relse(qoff->qql_start_lip);
- xfs_qm_qoff_logitem_relse(qoff);
- }
-}
-
-static const struct xfs_item_ops xfs_qm_qoffend_logitem_ops = {
- .iop_size = xfs_qm_qoff_logitem_size,
- .iop_format = xfs_qm_qoff_logitem_format,
- .iop_committed = xfs_qm_qoffend_logitem_committed,
- .iop_push = xfs_qm_qoff_logitem_push,
- .iop_release = xfs_qm_qoff_logitem_release,
-};
-
-static const struct xfs_item_ops xfs_qm_qoff_logitem_ops = {
- .iop_size = xfs_qm_qoff_logitem_size,
- .iop_format = xfs_qm_qoff_logitem_format,
- .iop_push = xfs_qm_qoff_logitem_push,
- .iop_release = xfs_qm_qoff_logitem_release,
-};
-
-/*
- * Delete the quotaoff intent from the AIL and free it. On success,
- * this should only be called for the start item. It can be used for
- * either on shutdown or abort.
- */
-void
-xfs_qm_qoff_logitem_relse(
- struct xfs_qoff_logitem *qoff)
-{
- struct xfs_log_item *lip = &qoff->qql_item;
-
- ASSERT(test_bit(XFS_LI_IN_AIL, &lip->li_flags) ||
- test_bit(XFS_LI_ABORTED, &lip->li_flags) ||
- XFS_FORCED_SHUTDOWN(lip->li_mountp));
- xfs_trans_ail_delete(lip, 0);
- kmem_free(lip->li_lv_shadow);
- kmem_free(qoff);
-}
-
-/*
- * Allocate and initialize an quotaoff item of the correct quota type(s).
- */
-struct xfs_qoff_logitem *
-xfs_qm_qoff_logitem_init(
- struct xfs_mount *mp,
- struct xfs_qoff_logitem *start,
- uint flags)
-{
- struct xfs_qoff_logitem *qf;
-
- qf = kmem_zalloc(sizeof(struct xfs_qoff_logitem), 0);
-
- xfs_log_item_init(mp, &qf->qql_item, XFS_LI_QUOTAOFF, start ?
- &xfs_qm_qoffend_logitem_ops : &xfs_qm_qoff_logitem_ops);
- qf->qql_item.li_mountp = mp;
- qf->qql_start_lip = start;
- qf->qql_flags = flags;
- return qf;
-}
diff --git a/fs/xfs/xfs_dquot_item.h b/fs/xfs/xfs_dquot_item.h
index 2b86a43d7ce2ec..794710c2447493 100644
--- a/fs/xfs/xfs_dquot_item.h
+++ b/fs/xfs/xfs_dquot_item.h
@@ -9,7 +9,6 @@
struct xfs_dquot;
struct xfs_trans;
struct xfs_mount;
-struct xfs_qoff_logitem;
struct xfs_dq_logitem {
struct xfs_log_item qli_item; /* common portion */
@@ -17,22 +16,6 @@ struct xfs_dq_logitem {
xfs_lsn_t qli_flush_lsn; /* lsn at last flush */
};
-struct xfs_qoff_logitem {
- struct xfs_log_item qql_item; /* common portion */
- struct xfs_qoff_logitem *qql_start_lip; /* qoff-start logitem, if any */
- unsigned int qql_flags;
-};
-
-
void xfs_qm_dquot_logitem_init(struct xfs_dquot *dqp);
-struct xfs_qoff_logitem *xfs_qm_qoff_logitem_init(struct xfs_mount *mp,
- struct xfs_qoff_logitem *start,
- uint flags);
-void xfs_qm_qoff_logitem_relse(struct xfs_qoff_logitem *);
-struct xfs_qoff_logitem *xfs_trans_get_qoff_item(struct xfs_trans *tp,
- struct xfs_qoff_logitem *startqoff,
- uint flags);
-void xfs_trans_log_quotaoff_item(struct xfs_trans *tp,
- struct xfs_qoff_logitem *qlp);
#endif /* __XFS_DQUOT_ITEM_H__ */
diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c
index fe341f3fd41901..580b9dba21122b 100644
--- a/fs/xfs/xfs_qm.c
+++ b/fs/xfs/xfs_qm.c
@@ -185,7 +185,7 @@ xfs_qm_dqpurge(
/*
* Purge the dquot cache.
*/
-void
+static void
xfs_qm_dqpurge_all(
struct xfs_mount *mp,
uint flags)
diff --git a/fs/xfs/xfs_qm.h b/fs/xfs/xfs_qm.h
index ebbb484c49dc7e..442a0f97a9d439 100644
--- a/fs/xfs/xfs_qm.h
+++ b/fs/xfs/xfs_qm.h
@@ -140,9 +140,6 @@ struct xfs_dquot_acct {
extern void xfs_qm_destroy_quotainfo(struct xfs_mount *);
-/* dquot stuff */
-extern void xfs_qm_dqpurge_all(struct xfs_mount *, uint);
-
/* quota ops */
extern int xfs_qm_scall_trunc_qfiles(struct xfs_mount *, uint);
extern int xfs_qm_scall_getquota(struct xfs_mount *mp,
diff --git a/fs/xfs/xfs_qm_syscalls.c b/fs/xfs/xfs_qm_syscalls.c
index 13a56e1ea15ce1..d16deb75dc83d7 100644
--- a/fs/xfs/xfs_qm_syscalls.c
+++ b/fs/xfs/xfs_qm_syscalls.c
@@ -19,91 +19,11 @@
#include "xfs_qm.h"
#include "xfs_icache.h"
-STATIC int
-xfs_qm_log_quotaoff(
- struct xfs_mount *mp,
- struct xfs_qoff_logitem **qoffstartp,
- uint flags)
-{
- struct xfs_trans *tp;
- int error;
- struct xfs_qoff_logitem *qoffi;
-
- error = xfs_trans_alloc(mp, &M_RES(mp)->tr_qm_quotaoff, 0, 0, 0, &tp);
- if (error)
- goto out;
-
- qoffi = xfs_trans_get_qoff_item(tp, NULL, flags & XFS_ALL_QUOTA_ACCT);
- xfs_trans_log_quotaoff_item(tp, qoffi);
-
- spin_lock(&mp->m_sb_lock);
- mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL;
- spin_unlock(&mp->m_sb_lock);
-
- xfs_log_sb(tp);
-
- /*
- * We have to make sure that the transaction is secure on disk before we
- * return and actually stop quota accounting. So, make it synchronous.
- * We don't care about quotoff's performance.
- */
- xfs_trans_set_sync(tp);
- error = xfs_trans_commit(tp);
- if (error)
- goto out;
-
- *qoffstartp = qoffi;
-out:
- return error;
-}
-
-STATIC int
-xfs_qm_log_quotaoff_end(
- struct xfs_mount *mp,
- struct xfs_qoff_logitem **startqoff,
- uint flags)
-{
- struct xfs_trans *tp;
- int error;
- struct xfs_qoff_logitem *qoffi;
-
- error = xfs_trans_alloc(mp, &M_RES(mp)->tr_qm_equotaoff, 0, 0, 0, &tp);
- if (error)
- return error;
-
- qoffi = xfs_trans_get_qoff_item(tp, *startqoff,
- flags & XFS_ALL_QUOTA_ACCT);
- xfs_trans_log_quotaoff_item(tp, qoffi);
- *startqoff = NULL;
-
- /*
- * We have to make sure that the transaction is secure on disk before we
- * return and actually stop quota accounting. So, make it synchronous.
- * We don't care about quotoff's performance.
- */
- xfs_trans_set_sync(tp);
- return xfs_trans_commit(tp);
-}
-
-/*
- * Turn off quota accounting and/or enforcement for all udquots and/or
- * gdquots. Called only at unmount time.
- *
- * This assumes that there are no dquots of this file system cached
- * incore, and modifies the ondisk dquot directly. Therefore, for example,
- * it is an error to call this twice, without purging the cache.
- */
int
xfs_qm_scall_quotaoff(
xfs_mount_t *mp,
uint flags)
{
- struct xfs_quotainfo *q = mp->m_quotainfo;
- uint dqtype;
- int error;
- uint inactivate_flags;
- struct xfs_qoff_logitem *qoffstart = NULL;
-
/*
* No file system can have quotas enabled on disk but not in core.
* Note that quota utilities (like quotaoff) _expect_
@@ -111,160 +31,23 @@ xfs_qm_scall_quotaoff(
*/
if ((mp->m_qflags & flags) == 0)
return -EEXIST;
- error = 0;
-
- flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
/*
- * We don't want to deal with two quotaoffs messing up each other,
- * so we're going to serialize it. quotaoff isn't exactly a performance
- * critical thing.
- * If quotaoff, then we must be dealing with the root filesystem.
+ * We do not support actually turning off quota accounting any more.
+ * Just log a warning and ignore the accounting related flags.
*/
- ASSERT(q);
- mutex_lock(&q->qi_quotaofflock);
+ if (flags & XFS_ALL_QUOTA_ACCT)
+ xfs_info(mp, "disabling of quota accounting not supported.");
- /*
- * If we're just turning off quota enforcement, change mp and go.
- */
- if ((flags & XFS_ALL_QUOTA_ACCT) == 0) {
- mp->m_qflags &= ~(flags);
-
- spin_lock(&mp->m_sb_lock);
- mp->m_sb.sb_qflags = mp->m_qflags;
- spin_unlock(&mp->m_sb_lock);
- mutex_unlock(&q->qi_quotaofflock);
-
- /* XXX what to do if error ? Revert back to old vals incore ? */
- return xfs_sync_sb(mp, false);
- }
-
- dqtype = 0;
- inactivate_flags = 0;
- /*
- * If accounting is off, we must turn enforcement off, clear the
- * quota 'CHKD' certificate to make it known that we have to
- * do a quotacheck the next time this quota is turned on.
- */
- if (flags & XFS_UQUOTA_ACCT) {
- dqtype |= XFS_QMOPT_UQUOTA;
- flags |= (XFS_UQUOTA_CHKD | XFS_UQUOTA_ENFD);
- inactivate_flags |= XFS_UQUOTA_ACTIVE;
- }
- if (flags & XFS_GQUOTA_ACCT) {
- dqtype |= XFS_QMOPT_GQUOTA;
- flags |= (XFS_GQUOTA_CHKD | XFS_GQUOTA_ENFD);
- inactivate_flags |= XFS_GQUOTA_ACTIVE;
- }
- if (flags & XFS_PQUOTA_ACCT) {
- dqtype |= XFS_QMOPT_PQUOTA;
- flags |= (XFS_PQUOTA_CHKD | XFS_PQUOTA_ENFD);
- inactivate_flags |= XFS_PQUOTA_ACTIVE;
- }
-
- /*
- * Nothing to do? Don't complain. This happens when we're just
- * turning off quota enforcement.
- */
- if ((mp->m_qflags & flags) == 0)
- goto out_unlock;
-
- /*
- * Write the LI_QUOTAOFF log record, and do SB changes atomically,
- * and synchronously. If we fail to write, we should abort the
- * operation as it cannot be recovered safely if we crash.
- */
- error = xfs_qm_log_quotaoff(mp, &qoffstart, flags);
- if (error)
- goto out_unlock;
-
- /*
- * Next we clear the XFS_MOUNT_*DQ_ACTIVE bit(s) in the mount struct
- * to take care of the race between dqget and quotaoff. We don't take
- * any special locks to reset these bits. All processes need to check
- * these bits *after* taking inode lock(s) to see if the particular
- * quota type is in the process of being turned off. If *ACTIVE, it is
- * guaranteed that all dquot structures and all quotainode ptrs will all
- * stay valid as long as that inode is kept locked.
- *
- * There is no turning back after this.
- */
- mp->m_qflags &= ~inactivate_flags;
-
- /*
- * Give back all the dquot reference(s) held by inodes.
- * Here we go thru every single incore inode in this file system, and
- * do a dqrele on the i_udquot/i_gdquot that it may have.
- * Essentially, as long as somebody has an inode locked, this guarantees
- * that quotas will not be turned off. This is handy because in a
- * transaction once we lock the inode(s) and check for quotaon, we can
- * depend on the quota inodes (and other things) being valid as long as
- * we keep the lock(s).
- */
- error = xfs_dqrele_all_inodes(mp, flags);
- ASSERT(!error);
-
- /*
- * Next we make the changes in the quota flag in the mount struct.
- * This isn't protected by a particular lock directly, because we
- * don't want to take a mrlock every time we depend on quotas being on.
- */
- mp->m_qflags &= ~flags;
-
- /*
- * Go through all the dquots of this file system and purge them,
- * according to what was turned off.
- */
- xfs_qm_dqpurge_all(mp, dqtype);
-
- /*
- * Transactions that had started before ACTIVE state bit was cleared
- * could have logged many dquots, so they'd have higher LSNs than
- * the first QUOTAOFF log record does. If we happen to crash when
- * the tail of the log has gone past the QUOTAOFF record, but
- * before the last dquot modification, those dquots __will__
- * recover, and that's not good.
- *
- * So, we have QUOTAOFF start and end logitems; the start
- * logitem won't get overwritten until the end logitem appears...
- */
- error = xfs_qm_log_quotaoff_end(mp, &qoffstart, flags);
- if (error) {
- /* We're screwed now. Shutdown is the only option. */
- xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
- goto out_unlock;
- }
-
- /*
- * If all quotas are completely turned off, close shop.
- */
- if (mp->m_qflags == 0) {
- mutex_unlock(&q->qi_quotaofflock);
- xfs_qm_destroy_quotainfo(mp);
- return 0;
- }
-
- /*
- * Release our quotainode references if we don't need them anymore.
- */
- if ((dqtype & XFS_QMOPT_UQUOTA) && q->qi_uquotaip) {
- xfs_irele(q->qi_uquotaip);
- q->qi_uquotaip = NULL;
- }
- if ((dqtype & XFS_QMOPT_GQUOTA) && q->qi_gquotaip) {
- xfs_irele(q->qi_gquotaip);
- q->qi_gquotaip = NULL;
- }
- if ((dqtype & XFS_QMOPT_PQUOTA) && q->qi_pquotaip) {
- xfs_irele(q->qi_pquotaip);
- q->qi_pquotaip = NULL;
- }
+ mutex_lock(&mp->m_quotainfo->qi_quotaofflock);
+ mp->m_qflags &= ~(flags & XFS_ALL_QUOTA_ENFD);
+ spin_lock(&mp->m_sb_lock);
+ mp->m_sb.sb_qflags = mp->m_qflags;
+ spin_unlock(&mp->m_sb_lock);
+ mutex_unlock(&mp->m_quotainfo->qi_quotaofflock);
-out_unlock:
- if (error && qoffstart)
- xfs_qm_qoff_logitem_relse(qoffstart);
- mutex_unlock(&q->qi_quotaofflock);
- return error;
+ /* XXX what to do if error ? Revert back to old vals incore ? */
+ return xfs_sync_sb(mp, false);
}
STATIC int
diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c
index 48e09ea30ee539..b7e4b05a559bdb 100644
--- a/fs/xfs/xfs_trans_dquot.c
+++ b/fs/xfs/xfs_trans_dquot.c
@@ -843,44 +843,6 @@ xfs_trans_reserve_quota_icreate(
dblocks, 1, XFS_QMOPT_RES_REGBLKS);
}
-/*
- * This routine is called to allocate a quotaoff log item.
- */
-struct xfs_qoff_logitem *
-xfs_trans_get_qoff_item(
- struct xfs_trans *tp,
- struct xfs_qoff_logitem *startqoff,
- uint flags)
-{
- struct xfs_qoff_logitem *q;
-
- ASSERT(tp != NULL);
-
- q = xfs_qm_qoff_logitem_init(tp->t_mountp, startqoff, flags);
- ASSERT(q != NULL);
-
- /*
- * Get a log_item_desc to point at the new item.
- */
- xfs_trans_add_item(tp, &q->qql_item);
- return q;
-}
-
-
-/*
- * This is called to mark the quotaoff logitem as needing
- * to be logged when the transaction is committed. The logitem must
- * already be associated with the given transaction.
- */
-void
-xfs_trans_log_quotaoff_item(
- struct xfs_trans *tp,
- struct xfs_qoff_logitem *qlp)
-{
- tp->t_flags |= XFS_TRANS_DIRTY;
- set_bit(XFS_LI_DIRTY, &qlp->qql_item.li_flags);
-}
-
STATIC void
xfs_trans_alloc_dqinfo(
xfs_trans_t *tp)
--
2.30.2
