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-rw-r--r--fs/xfs/xfs_mount.c106
1 files changed, 23 insertions, 83 deletions
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 71d2c97..4fa80e6 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -408,11 +408,11 @@ xfs_update_alignment(xfs_mount_t *mp)
if (xfs_sb_version_hasdalign(sbp)) {
if (sbp->sb_unit != mp->m_dalign) {
sbp->sb_unit = mp->m_dalign;
- mp->m_update_flags |= XFS_SB_UNIT;
+ mp->m_update_sb = true;
}
if (sbp->sb_width != mp->m_swidth) {
sbp->sb_width = mp->m_swidth;
- mp->m_update_flags |= XFS_SB_WIDTH;
+ mp->m_update_sb = true;
}
} else {
xfs_warn(mp,
@@ -583,38 +583,19 @@ 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.
- */
+ /* It is OK to look at sb_qflags in the 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)
+ if (!xfs_fs_writable(mp, SB_FREEZE_WRITE))
return 0;
- tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
- error = xfs_trans_reserve(tp, &M_RES(mp)->tr_qm_sbchange, 0, 0);
- if (error) {
- xfs_trans_cancel(tp, 0);
- xfs_alert(mp, "%s: Superblock update failed!", __func__);
- return error;
- }
-
- xfs_mod_sb(tp, XFS_SB_QFLAGS);
- return xfs_trans_commit(tp, 0);
+ return xfs_sync_sb(mp, false);
}
__uint64_t
@@ -659,26 +640,25 @@ xfs_mountfs(
xfs_sb_mount_common(mp, sbp);
/*
- * Check for a mismatched features2 values. Older kernels
- * read & wrote into the wrong sb offset for sb_features2
- * on some platforms due to xfs_sb_t not being 64bit size aligned
- * when sb_features2 was added, which made older superblock
- * reading/writing routines swap it as a 64-bit value.
+ * Check for a mismatched features2 values. Older kernels read & wrote
+ * into the wrong sb offset for sb_features2 on some platforms due to
+ * xfs_sb_t not being 64bit size aligned when sb_features2 was added,
+ * which made older superblock reading/writing routines swap it as a
+ * 64-bit value.
*
* For backwards compatibility, we make both slots equal.
*
- * If we detect a mismatched field, we OR the set bits into the
- * existing features2 field in case it has already been modified; we
- * don't want to lose any features. We then update the bad location
- * with the ORed value so that older kernels will see any features2
- * flags, and mark the two fields as needing updates once the
- * transaction subsystem is online.
+ * If we detect a mismatched field, we OR the set bits into the existing
+ * features2 field in case it has already been modified; we don't want
+ * to lose any features. We then update the bad location with the ORed
+ * value so that older kernels will see any features2 flags. The
+ * superblock writeback code ensures the new sb_features2 is copied to
+ * sb_bad_features2 before it is logged or written to disk.
*/
if (xfs_sb_has_mismatched_features2(sbp)) {
xfs_warn(mp, "correcting sb_features alignment problem");
sbp->sb_features2 |= sbp->sb_bad_features2;
- sbp->sb_bad_features2 = sbp->sb_features2;
- mp->m_update_flags |= XFS_SB_FEATURES2;
+ mp->m_update_sb = true;
/*
* Re-check for ATTR2 in case it was found in bad_features2
@@ -692,17 +672,17 @@ xfs_mountfs(
if (xfs_sb_version_hasattr2(&mp->m_sb) &&
(mp->m_flags & XFS_MOUNT_NOATTR2)) {
xfs_sb_version_removeattr2(&mp->m_sb);
- mp->m_update_flags |= XFS_SB_FEATURES2;
+ mp->m_update_sb = true;
/* update sb_versionnum for the clearing of the morebits */
if (!sbp->sb_features2)
- mp->m_update_flags |= XFS_SB_VERSIONNUM;
+ mp->m_update_sb = true;
}
/* always use v2 inodes by default now */
if (!(mp->m_sb.sb_versionnum & XFS_SB_VERSION_NLINKBIT)) {
mp->m_sb.sb_versionnum |= XFS_SB_VERSION_NLINKBIT;
- mp->m_update_flags |= XFS_SB_VERSIONNUM;
+ mp->m_update_sb = true;
}
/*
@@ -895,8 +875,8 @@ xfs_mountfs(
* the next remount into writeable mode. Otherwise we would never
* perform the update e.g. for the root filesystem.
*/
- if (mp->m_update_flags && !(mp->m_flags & XFS_MOUNT_RDONLY)) {
- error = xfs_mount_log_sb(mp, mp->m_update_flags);
+ if (mp->m_update_sb && !(mp->m_flags & XFS_MOUNT_RDONLY)) {
+ error = xfs_sync_sb(mp, false);
if (error) {
xfs_warn(mp, "failed to write sb changes");
goto out_rtunmount;
@@ -1103,9 +1083,6 @@ xfs_fs_writable(
int
xfs_log_sbcount(xfs_mount_t *mp)
{
- xfs_trans_t *tp;
- int error;
-
/* allow this to proceed during the freeze sequence... */
if (!xfs_fs_writable(mp, SB_FREEZE_COMPLETE))
return 0;
@@ -1119,17 +1096,7 @@ xfs_log_sbcount(xfs_mount_t *mp)
if (!xfs_sb_version_haslazysbcount(&mp->m_sb))
return 0;
- tp = _xfs_trans_alloc(mp, XFS_TRANS_SB_COUNT, KM_SLEEP);
- error = xfs_trans_reserve(tp, &M_RES(mp)->tr_sb, 0, 0);
- if (error) {
- xfs_trans_cancel(tp, 0);
- return error;
- }
-
- xfs_mod_sb(tp, XFS_SB_IFREE | XFS_SB_ICOUNT | XFS_SB_FDBLOCKS);
- xfs_trans_set_sync(tp);
- error = xfs_trans_commit(tp, 0);
- return error;
+ return xfs_sync_sb(mp, true);
}
/*
@@ -1423,33 +1390,6 @@ xfs_freesb(
}
/*
- * Used to log changes to the superblock unit and width fields which could
- * be altered by the mount options, as well as any potential sb_features2
- * fixup. Only the first superblock is updated.
- */
-int
-xfs_mount_log_sb(
- xfs_mount_t *mp,
- __int64_t fields)
-{
- xfs_trans_t *tp;
- int error;
-
- ASSERT(fields & (XFS_SB_UNIT | XFS_SB_WIDTH | XFS_SB_UUID |
- XFS_SB_FEATURES2 | XFS_SB_VERSIONNUM));
-
- tp = xfs_trans_alloc(mp, XFS_TRANS_SB_UNIT);
- error = xfs_trans_reserve(tp, &M_RES(mp)->tr_sb, 0, 0);
- if (error) {
- xfs_trans_cancel(tp, 0);
- return error;
- }
- xfs_mod_sb(tp, fields);
- error = xfs_trans_commit(tp, 0);
- return error;
-}
-
-/*
* If the underlying (data/log/rt) device is readonly, there are some
* operations that cannot proceed.
*/
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