diff options
Diffstat (limited to 'fs/xfs/xfs_dir2_leaf.h')
| -rw-r--r-- | fs/xfs/xfs_dir2_leaf.h | 37 |
1 files changed, 31 insertions, 6 deletions
diff --git a/fs/xfs/xfs_dir2_leaf.h b/fs/xfs/xfs_dir2_leaf.h index bc620622c342..140281adc7e5 100644 --- a/fs/xfs/xfs_dir2_leaf.h +++ b/fs/xfs/xfs_dir2_leaf.h @@ -18,6 +18,36 @@ #ifndef __XFS_DIR2_LEAF_H__ #define __XFS_DIR2_LEAF_H__ +/* + * Directory format 2, leaf block structures. + * + * A pure data block looks like the following drawing on disk: + * + * +---------------------------+ + * | xfs_dir2_leaf_hdr_t | + * +---------------------------+ + * | xfs_dir2_leaf_entry_t | + * | xfs_dir2_leaf_entry_t | + * | xfs_dir2_leaf_entry_t | + * | xfs_dir2_leaf_entry_t | + * | ... | + * +---------------------------+ + * | xfs_dir2_data_off_t | + * | xfs_dir2_data_off_t | + * | xfs_dir2_data_off_t | + * | ... | + * +---------------------------+ + * | xfs_dir2_leaf_tail_t | + * +---------------------------+ + * + * The bests (xfs_dir2_data_off_t members) and tail are at the end of the + * block for single-leaf only (magic = XFS_DIR2_LEAF1_MAGIC not + * XFS_DIR2_LEAFN_MAGIC). + * + * As all the entries are variable size structures the accessors in this + * file should be used to iterate over them. + */ + struct uio; struct xfs_dabuf; struct xfs_da_args; @@ -67,15 +97,10 @@ typedef struct xfs_dir2_leaf_tail { /* * Leaf block. - * bests and tail are at the end of the block for single-leaf only - * (magic = XFS_DIR2_LEAF1_MAGIC not XFS_DIR2_LEAFN_MAGIC). */ typedef struct xfs_dir2_leaf { xfs_dir2_leaf_hdr_t hdr; /* leaf header */ - xfs_dir2_leaf_entry_t ents[1]; /* entries */ - /* ... */ - xfs_dir2_data_off_t bests[1]; /* best free counts */ - xfs_dir2_leaf_tail_t tail; /* leaf tail */ + xfs_dir2_leaf_entry_t ents[]; /* entries */ } xfs_dir2_leaf_t; /* |