xfs: refactor log recovery item dispatch for pass2 readhead functions

Move the pass2 readhead code into the per-item source code files and use
the dispatch function to call them.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

fs/xfs/libxfs/xfs_log_recover.h

@@ -31,6 +31,9 @@ struct xlog_recover_item_ops {
 	 * values mean.
 	 */
 	enum xlog_recover_reorder (*reorder)(struct xlog_recover_item *item);
+
+	/* Start readahead for pass2, if provided. */
+	void (*ra_pass2)(struct xlog *log, struct xlog_recover_item *item);
 };
 
 extern const struct xlog_recover_item_ops xlog_icreate_item_ops;
@@ -92,4 +95,7 @@ struct xlog_recover {
 #define	XLOG_RECOVER_PASS1	1
 #define	XLOG_RECOVER_PASS2	2
 
+void xlog_buf_readahead(struct xlog *log, xfs_daddr_t blkno, uint len,
+		const struct xfs_buf_ops *ops);
+
 #endif	/* __XFS_LOG_RECOVER_H__ */

fs/xfs/xfs_buf_item_recover.c

@@ -46,7 +46,18 @@ xlog_recover_buf_reorder(
 	return XLOG_REORDER_BUFFER_LIST;
 }
 
+STATIC void
+xlog_recover_buf_ra_pass2(
+	struct xlog                     *log,
+	struct xlog_recover_item        *item)
+{
+	struct xfs_buf_log_format	*buf_f = item->ri_buf[0].i_addr;
+
+	xlog_buf_readahead(log, buf_f->blf_blkno, buf_f->blf_len, NULL);
+}
+
 const struct xlog_recover_item_ops xlog_buf_item_ops = {
 	.item_type		= XFS_LI_BUF,
 	.reorder		= xlog_recover_buf_reorder,
+	.ra_pass2		= xlog_recover_buf_ra_pass2,
 };

fs/xfs/xfs_dquot_item_recover.c

@@ -20,8 +20,42 @@
 #include "xfs_log_priv.h"
 #include "xfs_log_recover.h"
 
+STATIC void
+xlog_recover_dquot_ra_pass2(
+	struct xlog			*log,
+	struct xlog_recover_item	*item)
+{
+	struct xfs_mount	*mp = log->l_mp;
+	struct xfs_disk_dquot	*recddq;
+	struct xfs_dq_logformat	*dq_f;
+	uint			type;
+
+	if (mp->m_qflags == 0)
+		return;
+
+	recddq = item->ri_buf[1].i_addr;
+	if (recddq == NULL)
+		return;
+	if (item->ri_buf[1].i_len < sizeof(struct xfs_disk_dquot))
+		return;
+
+	type = recddq->d_flags & (XFS_DQ_USER | XFS_DQ_PROJ | XFS_DQ_GROUP);
+	ASSERT(type);
+	if (log->l_quotaoffs_flag & type)
+		return;
+
+	dq_f = item->ri_buf[0].i_addr;
+	ASSERT(dq_f);
+	ASSERT(dq_f->qlf_len == 1);
+
+	xlog_buf_readahead(log, dq_f->qlf_blkno,
+			XFS_FSB_TO_BB(mp, dq_f->qlf_len),
+			&xfs_dquot_buf_ra_ops);
+}
+
 const struct xlog_recover_item_ops xlog_dquot_item_ops = {
 	.item_type		= XFS_LI_DQUOT,
+	.ra_pass2		= xlog_recover_dquot_ra_pass2,
 };
 
 const struct xlog_recover_item_ops xlog_quotaoff_item_ops = {

fs/xfs/xfs_inode_item_recover.c

@@ -21,6 +21,25 @@
 #include "xfs_log_priv.h"
 #include "xfs_log_recover.h"
 
+STATIC void
+xlog_recover_inode_ra_pass2(
+	struct xlog                     *log,
+	struct xlog_recover_item        *item)
+{
+	if (item->ri_buf[0].i_len == sizeof(struct xfs_inode_log_format)) {
+		struct xfs_inode_log_format	*ilfp = item->ri_buf[0].i_addr;
+
+		xlog_buf_readahead(log, ilfp->ilf_blkno, ilfp->ilf_len,
+				   &xfs_inode_buf_ra_ops);
+	} else {
+		struct xfs_inode_log_format_32	*ilfp = item->ri_buf[0].i_addr;
+
+		xlog_buf_readahead(log, ilfp->ilf_blkno, ilfp->ilf_len,
+				   &xfs_inode_buf_ra_ops);
+	}
+}
+
 const struct xlog_recover_item_ops xlog_inode_item_ops = {
 	.item_type		= XFS_LI_INODE,
+	.ra_pass2		= xlog_recover_inode_ra_pass2,
 };

fs/xfs/xfs_log_recover.c

@@ -2023,7 +2023,7 @@ xlog_put_buffer_cancelled(
 	return true;
 }
 
-static void
+void
 xlog_buf_readahead(
 	struct xlog		*log,
 	xfs_daddr_t		blkno,
@@ -3890,96 +3890,6 @@ xlog_recover_do_icreate_pass2(
 				     length, be32_to_cpu(icl->icl_gen));
 }
 
-STATIC void
-xlog_recover_buffer_ra_pass2(
-	struct xlog                     *log,
-	struct xlog_recover_item        *item)
-{
-	struct xfs_buf_log_format	*buf_f = item->ri_buf[0].i_addr;
-
-	xlog_buf_readahead(log, buf_f->blf_blkno, buf_f->blf_len, NULL);
-}
-
-STATIC void
-xlog_recover_inode_ra_pass2(
-	struct xlog                     *log,
-	struct xlog_recover_item        *item)
-{
-	if (item->ri_buf[0].i_len == sizeof(struct xfs_inode_log_format)) {
-		struct xfs_inode_log_format	*ilfp = item->ri_buf[0].i_addr;
-
-		xlog_buf_readahead(log, ilfp->ilf_blkno, ilfp->ilf_len,
-				   &xfs_inode_buf_ra_ops);
-	} else {
-		struct xfs_inode_log_format_32	*ilfp = item->ri_buf[0].i_addr;
-
-		xlog_buf_readahead(log, ilfp->ilf_blkno, ilfp->ilf_len,
-				   &xfs_inode_buf_ra_ops);
-	}
-}
-
-STATIC void
-xlog_recover_dquot_ra_pass2(
-	struct xlog			*log,
-	struct xlog_recover_item	*item)
-{
-	struct xfs_mount	*mp = log->l_mp;
-	struct xfs_disk_dquot	*recddq;
-	struct xfs_dq_logformat	*dq_f;
-	uint			type;
-
-	if (mp->m_qflags == 0)
-		return;
-
-	recddq = item->ri_buf[1].i_addr;
-	if (recddq == NULL)
-		return;
-	if (item->ri_buf[1].i_len < sizeof(struct xfs_disk_dquot))
-		return;
-
-	type = recddq->d_flags & (XFS_DQ_USER | XFS_DQ_PROJ | XFS_DQ_GROUP);
-	ASSERT(type);
-	if (log->l_quotaoffs_flag & type)
-		return;
-
-	dq_f = item->ri_buf[0].i_addr;
-	ASSERT(dq_f);
-	ASSERT(dq_f->qlf_len == 1);
-
-	xlog_buf_readahead(log, dq_f->qlf_blkno,
-			XFS_FSB_TO_BB(mp, dq_f->qlf_len),
-			&xfs_dquot_buf_ra_ops);
-}
-
-STATIC void
-xlog_recover_ra_pass2(
-	struct xlog			*log,
-	struct xlog_recover_item	*item)
-{
-	switch (ITEM_TYPE(item)) {
-	case XFS_LI_BUF:
-		xlog_recover_buffer_ra_pass2(log, item);
-		break;
-	case XFS_LI_INODE:
-		xlog_recover_inode_ra_pass2(log, item);
-		break;
-	case XFS_LI_DQUOT:
-		xlog_recover_dquot_ra_pass2(log, item);
-		break;
-	case XFS_LI_EFI:
-	case XFS_LI_EFD:
-	case XFS_LI_QUOTAOFF:
-	case XFS_LI_RUI:
-	case XFS_LI_RUD:
-	case XFS_LI_CUI:
-	case XFS_LI_CUD:
-	case XFS_LI_BUI:
-	case XFS_LI_BUD:
-	default:
-		break;
-	}
-}
-
 STATIC int
 xlog_recover_commit_pass1(
 	struct xlog			*log,
@@ -4116,7 +4026,8 @@ xlog_recover_commit_trans(
 			error = xlog_recover_commit_pass1(log, trans, item);
 			break;
 		case XLOG_RECOVER_PASS2:
-			xlog_recover_ra_pass2(log, item);
+			if (item->ri_ops->ra_pass2)
+				item->ri_ops->ra_pass2(log, item);
 			list_move_tail(&item->ri_list, &ra_list);
 			items_queued++;
 			if (items_queued >= XLOG_RECOVER_COMMIT_QUEUE_MAX) {