diff options
Diffstat (limited to 'fs/xfs/xfs_dir2_block.h')
| -rw-r--r-- | fs/xfs/xfs_dir2_block.h | 44 |
1 files changed, 23 insertions, 21 deletions
diff --git a/fs/xfs/xfs_dir2_block.h b/fs/xfs/xfs_dir2_block.h index fe91f88f880c..de59677e38ba 100644 --- a/fs/xfs/xfs_dir2_block.h +++ b/fs/xfs/xfs_dir2_block.h @@ -19,10 +19,30 @@ #define __XFS_DIR2_BLOCK_H__ /* - * xfs_dir2_block.h - * Directory version 2, single block format structures + * Directory version 2, single block format structures. + * + * The single block format looks like the following drawing on disk: + * + * +-------------------------------------------------+ + * | xfs_dir2_data_hdr_t | + * +-------------------------------------------------+ + * | xfs_dir2_data_entry_t OR xfs_dir2_data_unused_t | + * | xfs_dir2_data_entry_t OR xfs_dir2_data_unused_t | + * | xfs_dir2_data_entry_t OR xfs_dir2_data_unused_t | + * | ... | + * +-------------------------------------------------+ + * | unused space | + * +-------------------------------------------------+ + * | ... | + * | xfs_dir2_leaf_entry_t | + * | xfs_dir2_leaf_entry_t | + * +-------------------------------------------------+ + * | xfs_dir2_block_tail_t | + * +-------------------------------------------------+ + * + * As all the entries are variable size structures the accessors in this + * file and xfs_dir2_data.h should be used to iterate over them. */ - struct uio; struct xfs_dabuf; struct xfs_da_args; @@ -32,14 +52,6 @@ struct xfs_inode; struct xfs_mount; struct xfs_trans; -/* - * The single block format is as follows: - * xfs_dir2_data_hdr_t structure - * xfs_dir2_data_entry_t and xfs_dir2_data_unused_t structures - * xfs_dir2_leaf_entry_t structures - * xfs_dir2_block_tail_t structure - */ - #define XFS_DIR2_BLOCK_MAGIC 0x58443242 /* XD2B: for one block dirs */ typedef struct xfs_dir2_block_tail { @@ -48,16 +60,6 @@ typedef struct xfs_dir2_block_tail { } xfs_dir2_block_tail_t; /* - * Generic single-block structure, for xfs_db. - */ -typedef struct xfs_dir2_block { - xfs_dir2_data_hdr_t hdr; /* magic XFS_DIR2_BLOCK_MAGIC */ - xfs_dir2_data_union_t u[1]; - xfs_dir2_leaf_entry_t leaf[1]; - xfs_dir2_block_tail_t tail; -} xfs_dir2_block_t; - -/* * Pointer to the leaf header embedded in a data block (1-block format) */ static inline xfs_dir2_block_tail_t * |