From b911ca0472c3762d2bafc4d21e432a9056844064 Mon Sep 17 00:00:00 2001
From: David Chinner <dgc@sgi.com>
Date: Thu, 10 Apr 2008 12:24:30 +1000
Subject: [XFS] Sanitise xfs_log_force error checking.
xfs_log_force() is declared to return an error, but we almost never check
it. We don't need to check it in most cases; if there's a log I/O error
then we'll be shutting down the filesystem anyway and that means we'll
catch the error somewhere else.
However, on certain calls we should be returning an error - sync
transactions, fsync, sync writes, etc. so this isn't a pure black and
white distinction. Hence make xfs_log_force() a void function that issues
a warning to the syslog on error, and call _xfs_log_force() in all the
places where we actually care about the error status returned.
SGI-PV: 980084
SGI-Modid: xfs-linux-melb:xfs-kern:30832a
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Niv Sardi <xaiki@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
---
fs/xfs/xfs_log.c | 25 +++++++++++++++++++++++--
fs/xfs/xfs_log.h | 5 +++--
fs/xfs/xfs_rw.c | 8 ++++----
3 files changed, 30 insertions(+), 8 deletions(-)
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index bece882f99e..e29ea0a6d76 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -382,7 +382,27 @@ _xfs_log_force(
return xlog_state_sync_all(log, flags, log_flushed);
else
return xlog_state_sync(log, lsn, flags, log_flushed);
-} /* xfs_log_force */
+} /* _xfs_log_force */
+
+/*
+ * Wrapper for _xfs_log_force(), to be used when caller doesn't care
+ * about errors or whether the log was flushed or not. This is the normal
+ * interface to use when trying to unpin items or move the log forward.
+ */
+void
+xfs_log_force(
+ xfs_mount_t *mp,
+ xfs_lsn_t lsn,
+ uint flags)
+{
+ int error;
+ error = _xfs_log_force(mp, lsn, flags, NULL);
+ if (error) {
+ xfs_fs_cmn_err(CE_WARN, mp, "xfs_log_force: "
+ "error %d returned.", error);
+ }
+}
+
/*
* Attaches a new iclog I/O completion callback routine during
@@ -634,7 +654,8 @@ xfs_log_unmount_write(xfs_mount_t *mp)
if (mp->m_flags & XFS_MOUNT_RDONLY)
return 0;
- xfs_log_force(mp, 0, XFS_LOG_FORCE|XFS_LOG_SYNC);
+ error = _xfs_log_force(mp, 0, XFS_LOG_FORCE|XFS_LOG_SYNC, NULL);
+ ASSERT(error || !(XLOG_FORCED_SHUTDOWN(log)));
#ifdef DEBUG
first_iclog = iclog = log->l_iclog;
diff --git a/fs/xfs/xfs_log.h b/fs/xfs/xfs_log.h
index 4cdac048df5..d1d678ecb63 100644
--- a/fs/xfs/xfs_log.h
+++ b/fs/xfs/xfs_log.h
@@ -142,8 +142,9 @@ int _xfs_log_force(struct xfs_mount *mp,
xfs_lsn_t lsn,
uint flags,
int *log_forced);
-#define xfs_log_force(mp, lsn, flags) \
- _xfs_log_force(mp, lsn, flags, NULL);
+void xfs_log_force(struct xfs_mount *mp,
+ xfs_lsn_t lsn,
+ uint flags);
int xfs_log_mount(struct xfs_mount *mp,
struct xfs_buftarg *log_target,
xfs_daddr_t start_block,
diff --git a/fs/xfs/xfs_rw.c b/fs/xfs/xfs_rw.c
index cd3ece6cc91..b0f31c09a76 100644
--- a/fs/xfs/xfs_rw.c
+++ b/fs/xfs/xfs_rw.c
@@ -126,11 +126,11 @@ xfs_write_sync_logforce(
* when we return.
*/
if (iip && iip->ili_last_lsn) {
- xfs_log_force(mp, iip->ili_last_lsn,
- XFS_LOG_FORCE | XFS_LOG_SYNC);
+ error = _xfs_log_force(mp, iip->ili_last_lsn,
+ XFS_LOG_FORCE | XFS_LOG_SYNC, NULL);
} else if (xfs_ipincount(ip) > 0) {
- xfs_log_force(mp, (xfs_lsn_t)0,
- XFS_LOG_FORCE | XFS_LOG_SYNC);
+ error = _xfs_log_force(mp, (xfs_lsn_t)0,
+ XFS_LOG_FORCE | XFS_LOG_SYNC, NULL);
}
} else {
--
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