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Diffstat (limited to 'fs/xfs/xfs_btree.h')
-rw-r--r--fs/xfs/xfs_btree.h79
1 files changed, 12 insertions, 67 deletions
diff --git a/fs/xfs/xfs_btree.h b/fs/xfs/xfs_btree.h
index 06729b67ad58..91e34f21bace 100644
--- a/fs/xfs/xfs_btree.h
+++ b/fs/xfs/xfs_btree.h
@@ -27,73 +27,6 @@ struct xfs_trans;
27extern kmem_zone_t *xfs_btree_cur_zone; 27extern kmem_zone_t *xfs_btree_cur_zone;
28 28
29/* 29/*
30 * This nonsense is to make -wlint happy.
31 */
32#define XFS_LOOKUP_EQ ((xfs_lookup_t)XFS_LOOKUP_EQi)
33#define XFS_LOOKUP_LE ((xfs_lookup_t)XFS_LOOKUP_LEi)
34#define XFS_LOOKUP_GE ((xfs_lookup_t)XFS_LOOKUP_GEi)
35
36#define XFS_BTNUM_BNO ((xfs_btnum_t)XFS_BTNUM_BNOi)
37#define XFS_BTNUM_CNT ((xfs_btnum_t)XFS_BTNUM_CNTi)
38#define XFS_BTNUM_BMAP ((xfs_btnum_t)XFS_BTNUM_BMAPi)
39#define XFS_BTNUM_INO ((xfs_btnum_t)XFS_BTNUM_INOi)
40
41/*
42 * Generic btree header.
43 *
44 * This is a combination of the actual format used on disk for short and long
45 * format btrees. The first three fields are shared by both format, but the
46 * pointers are different and should be used with care.
47 *
48 * To get the size of the actual short or long form headers please use the size
49 * macros below. Never use sizeof(xfs_btree_block).
50 *
51 * The blkno, crc, lsn, owner and uuid fields are only available in filesystems
52 * with the crc feature bit, and all accesses to them must be conditional on
53 * that flag.
54 */
55struct xfs_btree_block {
56 __be32 bb_magic; /* magic number for block type */
57 __be16 bb_level; /* 0 is a leaf */
58 __be16 bb_numrecs; /* current # of data records */
59 union {
60 struct {
61 __be32 bb_leftsib;
62 __be32 bb_rightsib;
63
64 __be64 bb_blkno;
65 __be64 bb_lsn;
66 uuid_t bb_uuid;
67 __be32 bb_owner;
68 __le32 bb_crc;
69 } s; /* short form pointers */
70 struct {
71 __be64 bb_leftsib;
72 __be64 bb_rightsib;
73
74 __be64 bb_blkno;
75 __be64 bb_lsn;
76 uuid_t bb_uuid;
77 __be64 bb_owner;
78 __le32 bb_crc;
79 __be32 bb_pad; /* padding for alignment */
80 } l; /* long form pointers */
81 } bb_u; /* rest */
82};
83
84#define XFS_BTREE_SBLOCK_LEN 16 /* size of a short form block */
85#define XFS_BTREE_LBLOCK_LEN 24 /* size of a long form block */
86
87/* sizes of CRC enabled btree blocks */
88#define XFS_BTREE_SBLOCK_CRC_LEN (XFS_BTREE_SBLOCK_LEN + 40)
89#define XFS_BTREE_LBLOCK_CRC_LEN (XFS_BTREE_LBLOCK_LEN + 48)
90
91#define XFS_BTREE_SBLOCK_CRC_OFF \
92 offsetof(struct xfs_btree_block, bb_u.s.bb_crc)
93#define XFS_BTREE_LBLOCK_CRC_OFF \
94 offsetof(struct xfs_btree_block, bb_u.l.bb_crc)
95
96/*
97 * Generic key, ptr and record wrapper structures. 30 * Generic key, ptr and record wrapper structures.
98 * 31 *
99 * These are disk format structures, and are converted where necessary 32 * These are disk format structures, and are converted where necessary
@@ -119,6 +52,18 @@ union xfs_btree_rec {
119}; 52};
120 53
121/* 54/*
55 * This nonsense is to make -wlint happy.
56 */
57#define XFS_LOOKUP_EQ ((xfs_lookup_t)XFS_LOOKUP_EQi)
58#define XFS_LOOKUP_LE ((xfs_lookup_t)XFS_LOOKUP_LEi)
59#define XFS_LOOKUP_GE ((xfs_lookup_t)XFS_LOOKUP_GEi)
60
61#define XFS_BTNUM_BNO ((xfs_btnum_t)XFS_BTNUM_BNOi)
62#define XFS_BTNUM_CNT ((xfs_btnum_t)XFS_BTNUM_CNTi)
63#define XFS_BTNUM_BMAP ((xfs_btnum_t)XFS_BTNUM_BMAPi)
64#define XFS_BTNUM_INO ((xfs_btnum_t)XFS_BTNUM_INOi)
65
66/*
122 * For logging record fields. 67 * For logging record fields.
123 */ 68 */
124#define XFS_BB_MAGIC (1 << 0) 69#define XFS_BB_MAGIC (1 << 0)