Create refcount update intent/done log items to record redo
information in the log. Because we need to roll transactions between
updating the bmbt mapping and updating the reverse mapping, we also
have to track the status of the metadata updates that will be recorded
in the post-roll transactions, just 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@xxxxxxxxxx>
---
libxfs/xfs_log_format.h | 54 +++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 52 insertions(+), 2 deletions(-)
diff --git a/libxfs/xfs_log_format.h b/libxfs/xfs_log_format.h
index b9627b7..923b08f 100644
--- a/libxfs/xfs_log_format.h
+++ b/libxfs/xfs_log_format.h
@@ -112,7 +112,9 @@ static inline uint xlog_get_cycle(char *ptr)
#define XLOG_REG_TYPE_ICREATE 20
#define XLOG_REG_TYPE_RUI_FORMAT 21
#define XLOG_REG_TYPE_RUD_FORMAT 22
-#define XLOG_REG_TYPE_MAX 22
+#define XLOG_REG_TYPE_CUI_FORMAT 23
+#define XLOG_REG_TYPE_CUD_FORMAT 24
+#define XLOG_REG_TYPE_MAX 24
/*
* Flags to log operation header
@@ -231,6 +233,8 @@ typedef struct xfs_trans_header {
#define XFS_LI_ICREATE 0x123f
#define XFS_LI_RUI 0x1240 /* rmap update intent */
#define XFS_LI_RUD 0x1241
+#define XFS_LI_CUI 0x1242 /* refcount update intent */
+#define XFS_LI_CUD 0x1243
#define XFS_LI_TYPE_DESC \
{ XFS_LI_EFI, "XFS_LI_EFI" }, \
@@ -242,7 +246,9 @@ typedef struct xfs_trans_header {
{ XFS_LI_QUOTAOFF, "XFS_LI_QUOTAOFF" }, \
{ XFS_LI_ICREATE, "XFS_LI_ICREATE" }, \
{ XFS_LI_RUI, "XFS_LI_RUI" }, \
- { XFS_LI_RUD, "XFS_LI_RUD" }
+ { XFS_LI_RUD, "XFS_LI_RUD" }, \
+ { XFS_LI_CUI, "XFS_LI_CUI" }, \
+ { XFS_LI_CUD, "XFS_LI_CUD" }
/*
* Inode Log Item Format definitions.
@@ -667,6 +673,50 @@ struct xfs_rud_log_format {
};
/*
+ * CUI/CUD (refcount update) log format definitions
+ */
+struct xfs_phys_extent {
+ __uint64_t pe_startblock;
+ __uint32_t pe_len;
+ __uint32_t pe_flags;
+};
+
+/* refcount pe_flags: upper bits are flags, lower byte is type code */
+#define XFS_REFCOUNT_EXTENT_INCREASE 1
+#define XFS_REFCOUNT_EXTENT_DECREASE 2
+#define XFS_REFCOUNT_EXTENT_ALLOC_COW 3
+#define XFS_REFCOUNT_EXTENT_FREE_COW 4
+#define XFS_REFCOUNT_EXTENT_TYPE_MASK 0xFF
+
+#define XFS_REFCOUNT_EXTENT_FLAGS (XFS_REFCOUNT_EXTENT_TYPE_MASK)
+
+/*
+ * This is the structure used to lay out a cui log item in the
+ * log. The cui_extents field is a variable size array whose
+ * size is given by cui_nextents.
+ */
+struct xfs_cui_log_format {
+ __uint16_t cui_type; /* cui log item type */
+ __uint16_t cui_size; /* size of this item */
+ __uint32_t cui_nextents; /* # extents to free */
+ __uint64_t cui_id; /* cui identifier */
+ struct xfs_phys_extent cui_extents[1]; /* array of extents */
+};
+
+/*
+ * This is the structure used to lay out a cud log item in the
+ * log. The cud_extents array is a variable size array whose
+ * size is given by cud_nextents;
+ */
+struct xfs_cud_log_format {
+ __uint16_t cud_type; /* cud log item type */
+ __uint16_t cud_size; /* size of this item */
+ __uint32_t cud_nextents; /* # of extents freed */
+ __uint64_t cud_cui_id; /* id of corresponding cui */
+ struct xfs_phys_extent cud_extents[1]; /* array of extents */
+};
+
+/*
* Dquot Log format definitions.
*
* The first two fields must be the type and size fitting into
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