xfs: create bmbt update intent log items

Source kernel commit: 6413a01420c2fbf03b3d059795f541caeb962e86

Create bmbt update intent/done log items to record redo information in
the log.  Because we roll transactions multiple times for reflink
operations, we also have to track the status of the metadata updates
that will be recorded in the post-roll transactions in case we crash
before committing the final transaction.  This mechanism enables log
recovery to finish what was already started.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

diff --git a/libxfs/xfs_log_format.h b/libxfs/xfs_log_format.h
index 554b02c2b46e09ee055de8a8f0368fd9416d95ce..8bb250281b83755bd33cecb7a20cd9d8336ba8ab 100644 (file)
--- a/libxfs/xfs_log_format.h
+++ b/libxfs/xfs_log_format.h
@@ -114,7 +114,9 @@ static inline uint xlog_get_cycle(char *ptr)
 #define XLOG_REG_TYPE_RUD_FORMAT       22
 #define XLOG_REG_TYPE_CUI_FORMAT       23
 #define XLOG_REG_TYPE_CUD_FORMAT       24
-#define XLOG_REG_TYPE_MAX              24
+#define XLOG_REG_TYPE_BUI_FORMAT       25
+#define XLOG_REG_TYPE_BUD_FORMAT       26
+#define XLOG_REG_TYPE_MAX              26
 
 /*
  * Flags to log operation header
@@ -235,6 +237,8 @@ typedef struct xfs_trans_header {
 #define        XFS_LI_RUD              0x1241
 #define        XFS_LI_CUI              0x1242  /* refcount update intent */
 #define        XFS_LI_CUD              0x1243
+#define        XFS_LI_BUI              0x1244  /* bmbt update intent */
+#define        XFS_LI_BUD              0x1245
 
 #define XFS_LI_TYPE_DESC \
        { XFS_LI_EFI,           "XFS_LI_EFI" }, \
@@ -248,7 +252,9 @@ typedef struct xfs_trans_header {
        { XFS_LI_RUI,           "XFS_LI_RUI" }, \
        { XFS_LI_RUD,           "XFS_LI_RUD" }, \
        { XFS_LI_CUI,           "XFS_LI_CUI" }, \
-       { XFS_LI_CUD,           "XFS_LI_CUD" }
+       { XFS_LI_CUD,           "XFS_LI_CUD" }, \
+       { XFS_LI_BUI,           "XFS_LI_BUI" }, \
+       { XFS_LI_BUD,           "XFS_LI_BUD" }
 
 /*
  * Inode Log Item Format definitions.
@@ -724,6 +730,54 @@ struct xfs_cud_log_format {
        __uint64_t              cud_cui_id;     /* id of corresponding cui */
 };
 
+/*
+ * BUI/BUD (inode block mapping) log format definitions
+ */
+
+/* bmbt me_flags: upper bits are flags, lower byte is type code */
+/* Type codes are taken directly from enum xfs_bmap_intent_type. */
+#define XFS_BMAP_EXTENT_TYPE_MASK      0xFF
+
+#define XFS_BMAP_EXTENT_ATTR_FORK      (1U << 31)
+#define XFS_BMAP_EXTENT_UNWRITTEN      (1U << 30)
+
+#define XFS_BMAP_EXTENT_FLAGS          (XFS_BMAP_EXTENT_TYPE_MASK | \
+                                        XFS_BMAP_EXTENT_ATTR_FORK | \
+                                        XFS_BMAP_EXTENT_UNWRITTEN)
+
+/*
+ * This is the structure used to lay out an bui log item in the
+ * log.  The bui_extents field is a variable size array whose
+ * size is given by bui_nextents.
+ */
+struct xfs_bui_log_format {
+       __uint16_t              bui_type;       /* bui log item type */
+       __uint16_t              bui_size;       /* size of this item */
+       __uint32_t              bui_nextents;   /* # extents to free */
+       __uint64_t              bui_id;         /* bui identifier */
+       struct xfs_map_extent   bui_extents[];  /* array of extents to bmap */
+};
+
+static inline size_t
+xfs_bui_log_format_sizeof(
+       unsigned int            nr)
+{
+       return sizeof(struct xfs_bui_log_format) +
+                       nr * sizeof(struct xfs_map_extent);
+}
+
+/*
+ * This is the structure used to lay out an bud log item in the
+ * log.  The bud_extents array is a variable size array whose
+ * size is given by bud_nextents;
+ */
+struct xfs_bud_log_format {
+       __uint16_t              bud_type;       /* bud log item type */
+       __uint16_t              bud_size;       /* size of this item */
+       __uint32_t              __pad;
+       __uint64_t              bud_bui_id;     /* id of corresponding bui */
+};
+
 /*
  * Dquot Log format definitions.
  *