This patch adds a new struct xfs_delay_context, which we
will use to keep track of the current state of a delayed
attribute operation.
The new enum is used to track various operations that
are in progress so that we know not to repeat them, and
resume where we left off before EAGAIN was returned to
cycle out the transaction. Other members take the place
of local variables that need to retain their values
across multiple function recalls.
Signed-off-by: Allison Collins <allison.henderson@xxxxxxxxxx>
---
libxfs/xfs_da_btree.h | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/libxfs/xfs_da_btree.h b/libxfs/xfs_da_btree.h
index eb3eb95..f5efb6d 100644
--- a/libxfs/xfs_da_btree.h
+++ b/libxfs/xfs_da_btree.h
@@ -42,6 +42,33 @@ enum xfs_dacmp {
XFS_CMP_CASE /* names are same but differ in case */
};
+enum xfs_attr_state {
+ XFS_DC_INIT = 1, /* Init delay info */
+ XFS_DC_SF_TO_LEAF = 2, /* Converted short form to leaf */
+ XFS_DC_FOUND_LBLK = 3, /* We found leaf blk for attr */
+ XFS_DC_LEAF_TO_NODE = 4, /* Converted leaf to node */
+ XFS_DC_FOUND_NBLK = 5, /* We found node blk for attr */
+ XFS_DC_ALLOC_LEAF = 6, /* We are allocating leaf blocks */
+ XFS_DC_ALLOC_NODE = 7, /* We are allocating node blocks */
+ XFS_DC_RM_INVALIDATE = 8, /* We are invalidating blocks */
+ XFS_DC_RM_SHRINK = 9, /* We are shrinking the tree */
+ XFS_DC_RM_NODE_BLKS = 10,/* We are removing node blocks */
+};
+
+/*
+ * Context used for keeping track of delayed attribute operations
+ */
+struct xfs_delay_context {
+ enum xfs_attr_state dc_state;
+ struct xfs_buf *leaf_bp;
+ struct xfs_bmbt_irec map;
+ xfs_dablk_t lblkno;
+ xfs_fileoff_t lfileoff;
+ int blkcnt;
+ struct xfs_da_state *da_state;
+ struct xfs_da_state_blk *blk;
+};
+
/*
* Structure to ease passing around component names.
*/
@@ -69,6 +96,7 @@ typedef struct xfs_da_args {
int rmtvaluelen2; /* remote attr value length in bytes */
int op_flags; /* operation flags */
enum xfs_dacmp cmpresult; /* name compare result for lookups */
+ struct xfs_delay_context dc; /* context used for delay attr ops */
} xfs_da_args_t;
/*
--
2.7.4
