diff options
Diffstat (limited to 'fs/xfs/xfs_btree.h')
| -rw-r--r-- | fs/xfs/xfs_btree.h | 100 |
1 files changed, 24 insertions, 76 deletions
diff --git a/fs/xfs/xfs_btree.h b/fs/xfs/xfs_btree.h index 55e3c7cc3c3d..91e34f21bace 100644 --- a/fs/xfs/xfs_btree.h +++ b/fs/xfs/xfs_btree.h @@ -27,75 +27,6 @@ struct xfs_trans; extern kmem_zone_t *xfs_btree_cur_zone; /* - * This nonsense is to make -wlint happy. - */ -#define XFS_LOOKUP_EQ ((xfs_lookup_t)XFS_LOOKUP_EQi) -#define XFS_LOOKUP_LE ((xfs_lookup_t)XFS_LOOKUP_LEi) -#define XFS_LOOKUP_GE ((xfs_lookup_t)XFS_LOOKUP_GEi) - -#define XFS_BTNUM_BNO ((xfs_btnum_t)XFS_BTNUM_BNOi) -#define XFS_BTNUM_CNT ((xfs_btnum_t)XFS_BTNUM_CNTi) -#define XFS_BTNUM_BMAP ((xfs_btnum_t)XFS_BTNUM_BMAPi) -#define XFS_BTNUM_INO ((xfs_btnum_t)XFS_BTNUM_INOi) - -/* - * Generic btree header. - * - * This is a combination of the actual format used on disk for short and long - * format btrees. The first three fields are shared by both format, but the - * pointers are different and should be used with care. - * - * To get the size of the actual short or long form headers please use the size - * macros below. Never use sizeof(xfs_btree_block). - * - * The blkno, crc, lsn, owner and uuid fields are only available in filesystems - * with the crc feature bit, and all accesses to them must be conditional on - * that flag. - */ -struct xfs_btree_block { - __be32 bb_magic; /* magic number for block type */ - __be16 bb_level; /* 0 is a leaf */ - __be16 bb_numrecs; /* current # of data records */ - union { - struct { - __be32 bb_leftsib; - __be32 bb_rightsib; - - __be64 bb_blkno; - __be64 bb_lsn; - uuid_t bb_uuid; - __be32 bb_owner; - __le32 bb_crc; - } s; /* short form pointers */ - struct { - __be64 bb_leftsib; - __be64 bb_rightsib; - - __be64 bb_blkno; - __be64 bb_lsn; - uuid_t bb_uuid; - __be64 bb_owner; - __le32 bb_crc; - __be32 bb_pad; /* padding for alignment */ - } l; /* long form pointers */ - } bb_u; /* rest */ -}; - -#define XFS_BTREE_SBLOCK_LEN 16 /* size of a short form block */ -#define XFS_BTREE_LBLOCK_LEN 24 /* size of a long form block */ - -/* sizes of CRC enabled btree blocks */ -#define XFS_BTREE_SBLOCK_CRC_LEN (XFS_BTREE_SBLOCK_LEN + 40) -#define XFS_BTREE_LBLOCK_CRC_LEN (XFS_BTREE_LBLOCK_LEN + 48) - - -#define XFS_BTREE_SBLOCK_CRC_OFF \ - offsetof(struct xfs_btree_block, bb_u.s.bb_crc) -#define XFS_BTREE_LBLOCK_CRC_OFF \ - offsetof(struct xfs_btree_block, bb_u.l.bb_crc) - - -/* * Generic key, ptr and record wrapper structures. * * These are disk format structures, and are converted where necessary @@ -121,17 +52,32 @@ union xfs_btree_rec { }; /* + * This nonsense is to make -wlint happy. + */ +#define XFS_LOOKUP_EQ ((xfs_lookup_t)XFS_LOOKUP_EQi) +#define XFS_LOOKUP_LE ((xfs_lookup_t)XFS_LOOKUP_LEi) +#define XFS_LOOKUP_GE ((xfs_lookup_t)XFS_LOOKUP_GEi) + +#define XFS_BTNUM_BNO ((xfs_btnum_t)XFS_BTNUM_BNOi) +#define XFS_BTNUM_CNT ((xfs_btnum_t)XFS_BTNUM_CNTi) +#define XFS_BTNUM_BMAP ((xfs_btnum_t)XFS_BTNUM_BMAPi) +#define XFS_BTNUM_INO ((xfs_btnum_t)XFS_BTNUM_INOi) + +/* * For logging record fields. */ -#define XFS_BB_MAGIC 0x01 -#define XFS_BB_LEVEL 0x02 -#define XFS_BB_NUMRECS 0x04 -#define XFS_BB_LEFTSIB 0x08 -#define XFS_BB_RIGHTSIB 0x10 -#define XFS_BB_BLKNO 0x20 +#define XFS_BB_MAGIC (1 << 0) +#define XFS_BB_LEVEL (1 << 1) +#define XFS_BB_NUMRECS (1 << 2) +#define XFS_BB_LEFTSIB (1 << 3) +#define XFS_BB_RIGHTSIB (1 << 4) +#define XFS_BB_BLKNO (1 << 5) +#define XFS_BB_LSN (1 << 6) +#define XFS_BB_UUID (1 << 7) +#define XFS_BB_OWNER (1 << 8) #define XFS_BB_NUM_BITS 5 #define XFS_BB_ALL_BITS ((1 << XFS_BB_NUM_BITS) - 1) -#define XFS_BB_NUM_BITS_CRC 8 +#define XFS_BB_NUM_BITS_CRC 9 #define XFS_BB_ALL_BITS_CRC ((1 << XFS_BB_NUM_BITS_CRC) - 1) /* @@ -444,6 +390,8 @@ int xfs_btree_new_iroot(struct xfs_btree_cur *, int *, int *); int xfs_btree_insert(struct xfs_btree_cur *, int *); int xfs_btree_delete(struct xfs_btree_cur *, int *); int xfs_btree_get_rec(struct xfs_btree_cur *, union xfs_btree_rec **, int *); +int xfs_btree_change_owner(struct xfs_btree_cur *cur, __uint64_t new_owner, + struct list_head *buffer_list); /* * btree block CRC helpers |