[PATCH 14/15] xfs: move b_li_list based retry handling to common code

[Christoph Hellwig <hch@lst.de>]

The dquot and inode version are very similar, which is expected given the
overall b_li_list logic.  The differences are that the inode version also
clears the XFS_LI_FLUSHING which is defined in common but only ever set
by the inode item, and that the dquot version takes the ail_lock over
the list iteration.  While this seems sensible given that additions and
removals from b_li_list are protected by the ail_lock, log items are
only added before buffer submission, and are only removed when completing
the buffer, so nothing can change the list when retrying a buffer.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/xfs/xfs_buf.c        | 12 ++++++------
 fs/xfs/xfs_buf_item.h   |  5 -----
 fs/xfs/xfs_dquot.c      | 12 ------------
 fs/xfs/xfs_inode_item.c | 12 ------------
 4 files changed, 6 insertions(+), 35 deletions(-)

diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index 0ad3cacfdba1..1cf5d14d0d06 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -1288,6 +1288,7 @@ xfs_buf_ioend_handle_error(
 {
 	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_error_cfg	*cfg;
+	struct xfs_log_item	*lip;
 
 	/*
 	 * If we've already shutdown the journal because of I/O errors, there's
@@ -1335,12 +1336,11 @@ xfs_buf_ioend_handle_error(
 	}
 
 	/* Still considered a transient error. Caller will schedule retries. */
-	if (bp->b_flags & _XBF_INODES)
-		xfs_buf_inode_io_fail(bp);
-	else if (bp->b_flags & _XBF_DQUOTS)
-		xfs_buf_dquot_io_fail(bp);
-	else
-		ASSERT(list_empty(&bp->b_li_list));
+	list_for_each_entry(lip, &bp->b_li_list, li_bio_list) {
+		set_bit(XFS_LI_FAILED, &lip->li_flags);
+		clear_bit(XFS_LI_FLUSHING, &lip->li_flags);
+	}
+
 	xfs_buf_ioerror(bp, 0);
 	xfs_buf_relse(bp);
 	return true;
diff --git a/fs/xfs/xfs_buf_item.h b/fs/xfs/xfs_buf_item.h
index 4d8a6aece995..8cde85259a58 100644
--- a/fs/xfs/xfs_buf_item.h
+++ b/fs/xfs/xfs_buf_item.h
@@ -54,17 +54,12 @@ bool	xfs_buf_item_put(struct xfs_buf_log_item *);
 void	xfs_buf_item_log(struct xfs_buf_log_item *, uint, uint);
 bool	xfs_buf_item_dirty_format(struct xfs_buf_log_item *);
 void	xfs_buf_inode_iodone(struct xfs_buf *);
-void	xfs_buf_inode_io_fail(struct xfs_buf *bp);
 #ifdef CONFIG_XFS_QUOTA
 void	xfs_buf_dquot_iodone(struct xfs_buf *);
-void	xfs_buf_dquot_io_fail(struct xfs_buf *bp);
 #else
 static inline void xfs_buf_dquot_iodone(struct xfs_buf *bp)
 {
 }
-static inline void xfs_buf_dquot_io_fail(struct xfs_buf *bp)
-{
-}
 #endif /* CONFIG_XFS_QUOTA */
 void	xfs_buf_iodone(struct xfs_buf *);
 bool	xfs_buf_log_check_iovec(struct xfs_log_iovec *iovec);
diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c
index f11d475898f2..78dde811ab16 100644
--- a/fs/xfs/xfs_dquot.c
+++ b/fs/xfs/xfs_dquot.c
@@ -1229,18 +1229,6 @@ xfs_buf_dquot_iodone(
 	}
 }
 
-void
-xfs_buf_dquot_io_fail(
-	struct xfs_buf		*bp)
-{
-	struct xfs_log_item	*lip;
-
-	spin_lock(&bp->b_mount->m_ail->ail_lock);
-	list_for_each_entry(lip, &bp->b_li_list, li_bio_list)
-		set_bit(XFS_LI_FAILED, &lip->li_flags);
-	spin_unlock(&bp->b_mount->m_ail->ail_lock);
-}
-
 /* Check incore dquot for errors before we flush. */
 static xfs_failaddr_t
 xfs_qm_dqflush_check(
diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c
index 912f0b1bc3cb..4fb2e1a6ad26 100644
--- a/fs/xfs/xfs_inode_item.c
+++ b/fs/xfs/xfs_inode_item.c
@@ -1023,18 +1023,6 @@ xfs_buf_inode_iodone(
 		list_splice_tail(&flushed_inodes, &bp->b_li_list);
 }
 
-void
-xfs_buf_inode_io_fail(
-	struct xfs_buf		*bp)
-{
-	struct xfs_log_item	*lip;
-
-	list_for_each_entry(lip, &bp->b_li_list, li_bio_list) {
-		set_bit(XFS_LI_FAILED, &lip->li_flags);
-		clear_bit(XFS_LI_FLUSHING, &lip->li_flags);
-	}
-}
-
 /*
  * Clear the inode logging fields so no more flushes are attempted.  If we are
  * on a buffer list, it is now safe to remove it because the buffer is
-- 
2.45.2