[05/20] xfs: introduce a swap-extent log intent item

Commit Message

Darrick J. Wong Dec. 31, 2023, 10:28 p.m. UTC

From: Darrick J. Wong <[e-mail]>

Introduce a new intent log item to handle swapping extents.

Signed-off-by: Darrick J. Wong <[e-mail]>
---
 libxfs/xfs_log_format.h |   51 ++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 48 insertions(+), 3 deletions(-)

Patch

diff --git a/libxfs/xfs_log_format.h b/libxfs/xfs_log_format.h
index 16872972e1e..24c3d5dc361 100644
--- a/libxfs/xfs_log_format.h
+++ b/libxfs/xfs_log_format.h
@@ -117,8 +117,9 @@  struct xfs_unmount_log_format {
 #define XLOG_REG_TYPE_ATTRD_FORMAT	28
 #define XLOG_REG_TYPE_ATTR_NAME	29
 #define XLOG_REG_TYPE_ATTR_VALUE	30
-#define XLOG_REG_TYPE_MAX		30
-
+#define XLOG_REG_TYPE_SXI_FORMAT	31
+#define XLOG_REG_TYPE_SXD_FORMAT	32
+#define XLOG_REG_TYPE_MAX		32
 
 /*
  * Flags to log operation header
@@ -243,6 +244,8 @@  typedef struct xfs_trans_header {
 #define	XFS_LI_BUD		0x1245
 #define	XFS_LI_ATTRI		0x1246  /* attr set/remove intent*/
 #define	XFS_LI_ATTRD		0x1247  /* attr set/remove done */
+#define	XFS_LI_SXI		0x1248  /* extent swap intent */
+#define	XFS_LI_SXD		0x1249  /* extent swap done */
 
 #define XFS_LI_TYPE_DESC \
 	{ XFS_LI_EFI,		"XFS_LI_EFI" }, \
@@ -260,7 +263,9 @@  typedef struct xfs_trans_header {
 	{ XFS_LI_BUI,		"XFS_LI_BUI" }, \
 	{ XFS_LI_BUD,		"XFS_LI_BUD" }, \
 	{ XFS_LI_ATTRI,		"XFS_LI_ATTRI" }, \
-	{ XFS_LI_ATTRD,		"XFS_LI_ATTRD" }
+	{ XFS_LI_ATTRD,		"XFS_LI_ATTRD" }, \
+	{ XFS_LI_SXI,		"XFS_LI_SXI" }, \
+	{ XFS_LI_SXD,		"XFS_LI_SXD" }
 
 /*
  * Inode Log Item Format definitions.
@@ -878,6 +883,46 @@  struct xfs_bud_log_format {
 	uint64_t		bud_bui_id;	/* id of corresponding bui */
 };
 
+/*
+ * SXI/SXD (extent swapping) log format definitions
+ */
+
+struct xfs_swap_extent {
+	uint64_t		sx_inode1;
+	uint64_t		sx_inode2;
+	uint64_t		sx_startoff1;
+	uint64_t		sx_startoff2;
+	uint64_t		sx_blockcount;
+	uint64_t		sx_flags;
+	int64_t			sx_isize1;
+	int64_t			sx_isize2;
+};
+
+#define XFS_SWAP_EXT_FLAGS		(0)
+
+#define XFS_SWAP_EXT_STRINGS
+
+/* This is the structure used to lay out an sxi log item in the log. */
+struct xfs_sxi_log_format {
+	uint16_t		sxi_type;	/* sxi log item type */
+	uint16_t		sxi_size;	/* size of this item */
+	uint32_t		__pad;		/* must be zero */
+	uint64_t		sxi_id;		/* sxi identifier */
+	struct xfs_swap_extent	sxi_extent;	/* extent to swap */
+};
+
+/*
+ * This is the structure used to lay out an sxd log item in the
+ * log.  The sxd_extents array is a variable size array whose
+ * size is given by sxd_nextents;
+ */
+struct xfs_sxd_log_format {
+	uint16_t		sxd_type;	/* sxd log item type */
+	uint16_t		sxd_size;	/* size of this item */
+	uint32_t		__pad;
+	uint64_t		sxd_sxi_id;	/* id of corresponding bui */
+};
+
 /*
  * Dquot Log format definitions.
  *