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authorLachlan McIlroy <lachlan@sgi.com>2007-02-10 18:36:29 +1100
committerTim Shimmin <tes@sgi.com>2007-02-10 18:36:29 +1100
commit5478eead8528f6cb5ebe3015fb88b68b175e1093 (patch)
tree13a5a0f48f25ef5fd77fe6b1ca8e062be94fc8f4 /fs
parentc97be736051dacefb00643095d76fd5b70dfef7b (diff)
downloadop-kernel-dev-5478eead8528f6cb5ebe3015fb88b68b175e1093.zip
op-kernel-dev-5478eead8528f6cb5ebe3015fb88b68b175e1093.tar.gz
[XFS] Re-initialize the per-cpu superblock counters after recovery.
After filesystem recovery the superblock is re-read to bring in any changes. If the per-cpu superblock counters are not re-initialized from the superblock then the next time the per-cpu counters are disabled they might overwrite the global counter with a bogus value. SGI-PV: 957348 SGI-Modid: xfs-linux-melb:xfs-kern:27999a Signed-off-by: Lachlan McIlroy <lachlan@sgi.com> Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Tim Shimmin <tes@sgi.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/xfs/xfs_log_recover.c3
-rw-r--r--fs/xfs/xfs_mount.c23
-rw-r--r--fs/xfs/xfs_mount.h2
3 files changed, 23 insertions, 5 deletions
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 61a29e1..ca74d3f 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -3848,6 +3848,9 @@ xlog_do_recover(
ASSERT(XFS_SB_GOOD_VERSION(sbp));
xfs_buf_relse(bp);
+ /* We've re-read the superblock so re-initialize per-cpu counters */
+ xfs_icsb_reinit_counters(log->l_mp);
+
xlog_recover_check_summary(log);
/* Normal transactions can now occur */
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 30a5781..3bed0cf0 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -543,11 +543,8 @@ xfs_readsb(xfs_mount_t *mp, int flags)
ASSERT(XFS_BUF_VALUSEMA(bp) <= 0);
}
- xfs_icsb_lock(mp);
- xfs_icsb_balance_counter(mp, XFS_SBS_ICOUNT, 0, 0);
- xfs_icsb_balance_counter(mp, XFS_SBS_IFREE, 0, 0);
- xfs_icsb_balance_counter(mp, XFS_SBS_FDBLOCKS, 0, 0);
- xfs_icsb_unlock(mp);
+ /* Initialize per-cpu counters */
+ xfs_icsb_reinit_counters(mp);
mp->m_sb_bp = bp;
xfs_buf_relse(bp);
@@ -1811,6 +1808,22 @@ xfs_icsb_init_counters(
return 0;
}
+void
+xfs_icsb_reinit_counters(
+ xfs_mount_t *mp)
+{
+ xfs_icsb_lock(mp);
+ /*
+ * start with all counters disabled so that the
+ * initial balance kicks us off correctly
+ */
+ mp->m_icsb_counters = -1;
+ xfs_icsb_balance_counter(mp, XFS_SBS_ICOUNT, 0, 0);
+ xfs_icsb_balance_counter(mp, XFS_SBS_IFREE, 0, 0);
+ xfs_icsb_balance_counter(mp, XFS_SBS_FDBLOCKS, 0, 0);
+ xfs_icsb_unlock(mp);
+}
+
STATIC void
xfs_icsb_destroy_counters(
xfs_mount_t *mp)
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index eb94b97..82304b9 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -307,10 +307,12 @@ typedef struct xfs_icsb_cnts {
#define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */
extern int xfs_icsb_init_counters(struct xfs_mount *);
+extern void xfs_icsb_reinit_counters(struct xfs_mount *);
extern void xfs_icsb_sync_counters_flags(struct xfs_mount *, int);
#else
#define xfs_icsb_init_counters(mp) (0)
+#define xfs_icsb_reinit_counters(mp) do { } while (0)
#define xfs_icsb_sync_counters_flags(mp, flags) do { } while (0)
#endif
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