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[PATCH 7/8] xfs: handle CIl transaction commit failures correctly

To: xfs@xxxxxxxxxxx
Subject: [PATCH 7/8] xfs: handle CIl transaction commit failures correctly
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Thu, 27 Jan 2011 14:53:20 +1100
In-reply-to: <1296100401-17135-1-git-send-email-david@xxxxxxxxxxxxx>
References: <1296100401-17135-1-git-send-email-david@xxxxxxxxxxxxx>
From: Dave Chinner <dchinner@xxxxxxxxxx>

Failure to commit a transaction into the CIL is not handled
correctly. This currently can only happen when racing with a
shutdown and requires an explicit shutdown check, so it rare and can
be avoided. Remove the shutdown check and make the CIL commit a void
function to indicate it will always succeed, thereby removing the
incorrectly handled failure case.

Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Alex Elder <aelder@xxxxxxx>
---
 fs/xfs/xfs_log.h     |    2 +-
 fs/xfs/xfs_log_cil.c |    8 +-------
 fs/xfs/xfs_trans.c   |    5 +----
 3 files changed, 3 insertions(+), 12 deletions(-)

diff --git a/fs/xfs/xfs_log.h b/fs/xfs/xfs_log.h
index 916eb7d..3bd3291 100644
--- a/fs/xfs/xfs_log.h
+++ b/fs/xfs/xfs_log.h
@@ -191,7 +191,7 @@ void          xfs_log_ticket_put(struct xlog_ticket 
*ticket);
 
 xlog_tid_t xfs_log_get_trans_ident(struct xfs_trans *tp);
 
-int    xfs_log_commit_cil(struct xfs_mount *mp, struct xfs_trans *tp,
+void   xfs_log_commit_cil(struct xfs_mount *mp, struct xfs_trans *tp,
                                struct xfs_log_vec *log_vector,
                                xfs_lsn_t *commit_lsn, int flags);
 bool   xfs_log_item_in_current_chkpt(struct xfs_log_item *lip);
diff --git a/fs/xfs/xfs_log_cil.c b/fs/xfs/xfs_log_cil.c
index c7eac5a..9ca59be 100644
--- a/fs/xfs/xfs_log_cil.c
+++ b/fs/xfs/xfs_log_cil.c
@@ -625,7 +625,7 @@ out_abort:
  * background commit, returns without it held once background commits are
  * allowed again.
  */
-int
+void
 xfs_log_commit_cil(
        struct xfs_mount        *mp,
        struct xfs_trans        *tp,
@@ -640,11 +640,6 @@ xfs_log_commit_cil(
        if (flags & XFS_TRANS_RELEASE_LOG_RES)
                log_flags = XFS_LOG_REL_PERM_RESERV;
 
-       if (XLOG_FORCED_SHUTDOWN(log)) {
-               xlog_cil_free_logvec(log_vector);
-               return XFS_ERROR(EIO);
-       }
-
        /*
         * do all the hard work of formatting items (including memory
         * allocation) outside the CIL context lock. This prevents stalling CIL
@@ -704,7 +699,6 @@ xfs_log_commit_cil(
         */
        if (push)
                xlog_cil_push(log, 0);
-       return 0;
 }
 
 /*
diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c
index 29f5e54..7692279 100644
--- a/fs/xfs/xfs_trans.c
+++ b/fs/xfs/xfs_trans.c
@@ -1755,7 +1755,6 @@ xfs_trans_commit_cil(
        int                     flags)
 {
        struct xfs_log_vec      *log_vector;
-       int                     error;
 
        /*
         * Get each log item to allocate a vector structure for
@@ -1766,9 +1765,7 @@ xfs_trans_commit_cil(
        if (!log_vector)
                return ENOMEM;
 
-       error = xfs_log_commit_cil(mp, tp, log_vector, commit_lsn, flags);
-       if (error)
-               return error;
+       xfs_log_commit_cil(mp, tp, log_vector, commit_lsn, flags);
 
        current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
        xfs_trans_free(tp);
-- 
1.7.2.3

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