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xfs: kill xfs_qmops

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Kill the quota ops function vector and replace it with direct calls or
stubs in the CONFIG_XFS_QUOTA=n case.

Make sure we check XFS_IS_QUOTA_RUNNING in the right spots.  We can remove
the number of those checks because the XFS_TRANS_DQ_DIRTY flag can't be set
otherwise.

This brings us back closer to the way this code worked in IRIX and earlier
Linux versions, but we keep a lot of the more useful factoring of common
code.

Eventually we should also kill xfs_qm_bhv.c, but that's left for a later
patch.

Reduces the size of the source code by about 250 lines and the size of
XFS module by about 1.5 kilobytes with quotas enabled:

   text	   data	    bss	    dec	    hex	filename
 615957	   2960	   3848	 622765	  980ad	fs/xfs/xfs.o
 617231	   3152	   3848	 624231	  98667	fs/xfs/xfs.o.old

Fallout:

 - xfs_qm_dqattach is split into xfs_qm_dqattach_locked which expects
   the inode locked and xfs_qm_dqattach which does the locking around it,
   thus removing XFS_QMOPT_ILOCKED.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Eric Sandeen <sandeen@sandeen.net>
This commit is contained in:
Christoph Hellwig
2009-06-08 15:33:32 +02:00
committed by Christoph Hellwig
parent 0c5e1ce89f
commit 7d095257e3
23 changed files with 377 additions and 625 deletions
Download Patch File Download Diff File Expand all files Collapse all files

103
fs/xfs/xfs_mount.c
View File

@@ -959,6 +959,53 @@ xfs_check_sizes(xfs_mount_t *mp)
return 0;
}
/*
* Clear the quotaflags in memory and in the superblock.
*/
int
xfs_mount_reset_sbqflags(
struct xfs_mount *mp)
{
int error;
struct xfs_trans *tp;
mp->m_qflags = 0;
/*
* It is OK to look at sb_qflags here in mount path,
* without m_sb_lock.
*/
if (mp->m_sb.sb_qflags == 0)
return 0;
spin_lock(&mp->m_sb_lock);
mp->m_sb.sb_qflags = 0;
spin_unlock(&mp->m_sb_lock);
/*
* If the fs is readonly, let the incore superblock run
* with quotas off but don't flush the update out to disk
*/
if (mp->m_flags & XFS_MOUNT_RDONLY)
return 0;
#ifdef QUOTADEBUG
xfs_fs_cmn_err(CE_NOTE, mp, "Writing superblock quota changes");
#endif
tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0,
XFS_DEFAULT_LOG_COUNT);
if (error) {
xfs_trans_cancel(tp, 0);
xfs_fs_cmn_err(CE_ALERT, mp,
"xfs_mount_reset_sbqflags: Superblock update failed!");
return error;
}
xfs_mod_sb(tp, XFS_SB_QFLAGS);
return xfs_trans_commit(tp, 0);
}
/*
* This function does the following on an initial mount of a file system:
* - reads the superblock from disk and init the mount struct
@@ -976,7 +1023,8 @@ xfs_mountfs(
xfs_sb_t *sbp = &(mp->m_sb);
xfs_inode_t *rip;
__uint64_t resblks;
uint quotamount, quotaflags;
uint quotamount = 0;
uint quotaflags = 0;
int error = 0;
xfs_mount_common(mp, sbp);
@@ -1210,9 +1258,28 @@ xfs_mountfs(
/*
* Initialise the XFS quota management subsystem for this mount
*/
error = XFS_QM_INIT(mp, &quotamount, &quotaflags);
if (error)
goto out_rtunmount;
if (XFS_IS_QUOTA_RUNNING(mp)) {
error = xfs_qm_newmount(mp, &quotamount, &quotaflags);
if (error)
goto out_rtunmount;
} else {
ASSERT(!XFS_IS_QUOTA_ON(mp));
/*
* If a file system had quotas running earlier, but decided to
* mount without -o uquota/pquota/gquota options, revoke the
* quotachecked license.
*/
if (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT) {
cmn_err(CE_NOTE,
"XFS: resetting qflags for filesystem %s",
mp->m_fsname);
error = xfs_mount_reset_sbqflags(mp);
if (error)
return error;
}
}
/*
* Finish recovering the file system. This part needed to be
@@ -1228,9 +1295,19 @@ xfs_mountfs(
/*
* Complete the quota initialisation, post-log-replay component.
*/
error = XFS_QM_MOUNT(mp, quotamount, quotaflags);
if (error)
goto out_rtunmount;
if (quotamount) {
ASSERT(mp->m_qflags == 0);
mp->m_qflags = quotaflags;
xfs_qm_mount_quotas(mp);
}
#if defined(DEBUG) && defined(XFS_LOUD_RECOVERY)
if (XFS_IS_QUOTA_ON(mp))
xfs_fs_cmn_err(CE_NOTE, mp, "Disk quotas turned on");
else
xfs_fs_cmn_err(CE_NOTE, mp, "Disk quotas not turned on");
#endif
/*
* Now we are mounted, reserve a small amount of unused space for
@@ -1279,12 +1356,7 @@ xfs_unmountfs(
__uint64_t resblks;
int error;
/*
* Release dquot that rootinode, rbmino and rsumino might be holding,
* and release the quota inodes.
*/
XFS_QM_UNMOUNT(mp);
xfs_qm_unmount_quotas(mp);
xfs_rtunmount_inodes(mp);
IRELE(mp->m_rootip);
@@ -1301,10 +1373,7 @@ xfs_unmountfs(
xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
xfs_reclaim_inodes(mp, 0, XFS_IFLUSH_ASYNC);
XFS_QM_DQPURGEALL(mp, XFS_QMOPT_QUOTALL | XFS_QMOPT_UMOUNTING);
if (mp->m_quotainfo)
XFS_QM_DONE(mp);
xfs_qm_unmount(mp);
/*
* Flush out the log synchronously so that we know for sure