[PATCH 06/30] xfs: mark log recovery buffers for completion

[Dave Chinner <david@fromorbit.com>]

From: Dave Chinner <dchinner@redhat.com>

Log recovery has it's own buffer write completion handler for
buffers that it directly recovers. Convert these to direct calls by
flagging these buffers as being log recovery buffers. The flag will
get cleared by the log recovery IO completion routine, so it will
never leak out of log recovery.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 fs/xfs/xfs_buf.c                | 10 ++++++++++
 fs/xfs/xfs_buf.h                |  2 ++
 fs/xfs/xfs_buf_item_recover.c   |  5 ++---
 fs/xfs/xfs_dquot_item_recover.c |  2 +-
 fs/xfs/xfs_inode_item_recover.c |  2 +-
 fs/xfs/xfs_log_recover.c        |  5 ++---
 6 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index 517932675b12..6a2c942372fc 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -14,6 +14,7 @@
 #include "xfs_mount.h"
 #include "xfs_trace.h"
 #include "xfs_log.h"
+#include "xfs_log_recover.h"
 #include "xfs_trans.h"
 #include "xfs_buf_item.h"
 #include "xfs_errortag.h"
@@ -1207,6 +1208,15 @@ xfs_buf_ioend(
 	if (read)
 		goto out_finish;
 
+	/*
+	 * If this is a log recovery buffer, we aren't doing transactional IO
+	 * yet so we need to let it handle IO completions.
+	 */
+	if (bp->b_flags & _XBF_LOGRECOVERY) {
+		xlog_recover_iodone(bp);
+		return;
+	}
+
 	if (bp->b_flags & _XBF_INODES) {
 		xfs_buf_inode_iodone(bp);
 		return;
diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h
index c1d0843206dd..30dabc5bae96 100644
--- a/fs/xfs/xfs_buf.h
+++ b/fs/xfs/xfs_buf.h
@@ -33,6 +33,7 @@
 /* buffer type flags for write callbacks */
 #define _XBF_INODES	 (1 << 16)/* inode buffer */
 #define _XBF_DQUOTS	 (1 << 17)/* dquot buffer */
+#define _XBF_LOGRECOVERY	 (1 << 18)/* log recovery buffer */
 
 /* flags used only internally */
 #define _XBF_PAGES	 (1 << 20)/* backed by refcounted pages */
@@ -56,6 +57,7 @@ typedef unsigned int xfs_buf_flags_t;
 	{ XBF_WRITE_FAIL,	"WRITE_FAIL" }, \
 	{ _XBF_INODES,		"INODES" }, \
 	{ _XBF_DQUOTS,		"DQUOTS" }, \
+	{ _XBF_LOGRECOVERY,		"LOG_RECOVERY" }, \
 	{ _XBF_PAGES,		"PAGES" }, \
 	{ _XBF_KMEM,		"KMEM" }, \
 	{ _XBF_DELWRI_Q,	"DELWRI_Q" }, \
diff --git a/fs/xfs/xfs_buf_item_recover.c b/fs/xfs/xfs_buf_item_recover.c
index 04faa7310c4f..74c851f60eee 100644
--- a/fs/xfs/xfs_buf_item_recover.c
+++ b/fs/xfs/xfs_buf_item_recover.c
@@ -419,8 +419,7 @@ xlog_recover_validate_buf_type(
 	if (bp->b_ops) {
 		struct xfs_buf_log_item	*bip;
 
-		ASSERT(!bp->b_iodone || bp->b_iodone == xlog_recover_iodone);
-		bp->b_iodone = xlog_recover_iodone;
+		bp->b_flags |= _XBF_LOGRECOVERY;
 		xfs_buf_item_init(bp, mp);
 		bip = bp->b_log_item;
 		bip->bli_item.li_lsn = current_lsn;
@@ -963,7 +962,7 @@ xlog_recover_buf_commit_pass2(
 		error = xfs_bwrite(bp);
 	} else {
 		ASSERT(bp->b_mount == mp);
-		bp->b_iodone = xlog_recover_iodone;
+		bp->b_flags |= _XBF_LOGRECOVERY;
 		xfs_buf_delwri_queue(bp, buffer_list);
 	}
 
diff --git a/fs/xfs/xfs_dquot_item_recover.c b/fs/xfs/xfs_dquot_item_recover.c
index 3400be4c88f0..f9ea9f55aa7c 100644
--- a/fs/xfs/xfs_dquot_item_recover.c
+++ b/fs/xfs/xfs_dquot_item_recover.c
@@ -153,7 +153,7 @@ xlog_recover_dquot_commit_pass2(
 
 	ASSERT(dq_f->qlf_size == 2);
 	ASSERT(bp->b_mount == mp);
-	bp->b_iodone = xlog_recover_iodone;
+	bp->b_flags |= _XBF_LOGRECOVERY;
 	xfs_buf_delwri_queue(bp, buffer_list);
 
 out_release:
diff --git a/fs/xfs/xfs_inode_item_recover.c b/fs/xfs/xfs_inode_item_recover.c
index dc3e26ff16c9..5e0d291835b3 100644
--- a/fs/xfs/xfs_inode_item_recover.c
+++ b/fs/xfs/xfs_inode_item_recover.c
@@ -376,7 +376,7 @@ xlog_recover_inode_commit_pass2(
 	xfs_dinode_calc_crc(log->l_mp, dip);
 
 	ASSERT(bp->b_mount == mp);
-	bp->b_iodone = xlog_recover_iodone;
+	bp->b_flags |= _XBF_LOGRECOVERY;
 	xfs_buf_delwri_queue(bp, buffer_list);
 
 out_release:
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index ec015df55b77..52a65a74208f 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -287,9 +287,8 @@ xlog_recover_iodone(
 	if (bp->b_log_item)
 		xfs_buf_item_relse(bp);
 	ASSERT(bp->b_log_item == NULL);
-
-	bp->b_iodone = NULL;
-	xfs_buf_ioend(bp);
+	bp->b_flags &= ~_XBF_LOGRECOVERY;
+	xfs_buf_ioend_finish(bp);
 }
 
 /*
-- 
2.26.2.761.g0e0b3e54be