diff options
Diffstat (limited to 'fs/xfs/libxfs/xfs_btree.h')
| -rw-r--r-- | fs/xfs/libxfs/xfs_btree.h | 28 |
1 files changed, 22 insertions, 6 deletions
diff --git a/fs/xfs/libxfs/xfs_btree.h b/fs/xfs/libxfs/xfs_btree.h index 8b37deb26274..b6604b83760b 100644 --- a/fs/xfs/libxfs/xfs_btree.h +++ b/fs/xfs/libxfs/xfs_btree.h @@ -214,6 +214,19 @@ struct xfs_btree_cur_ino { #define XFS_BTCUR_BMBT_INVALID_OWNER (1 << 1) }; +struct xfs_btree_level { + /* buffer pointer */ + struct xfs_buf *bp; + + /* key/record number */ + unsigned int ptr; + + /* readahead info */ +#define XFS_BTCUR_LEFTRA 1 /* left sibling has been read-ahead */ +#define XFS_BTCUR_RIGHTRA 2 /* right sibling has been read-ahead */ + uint8_t ra; +}; + /* * Btree cursor structure. * This collects all information needed by the btree code in one place. @@ -225,11 +238,6 @@ struct xfs_btree_cur const struct xfs_btree_ops *bc_ops; uint bc_flags; /* btree features - below */ union xfs_btree_irec bc_rec; /* current insert/search record value */ - struct xfs_buf *bc_bufs[XFS_BTREE_MAXLEVELS]; /* buf ptr per level */ - int bc_ptrs[XFS_BTREE_MAXLEVELS]; /* key/record # */ - uint8_t bc_ra[XFS_BTREE_MAXLEVELS]; /* readahead bits */ -#define XFS_BTCUR_LEFTRA 1 /* left sibling has been read-ahead */ -#define XFS_BTCUR_RIGHTRA 2 /* right sibling has been read-ahead */ uint8_t bc_nlevels; /* number of levels in the tree */ uint8_t bc_blocklog; /* log2(blocksize) of btree blocks */ xfs_btnum_t bc_btnum; /* identifies which btree type */ @@ -238,8 +246,17 @@ struct xfs_btree_cur struct xfs_btree_cur_ag bc_ag; struct xfs_btree_cur_ino bc_ino; }; + + /* Must be at the end of the struct! */ + struct xfs_btree_level bc_levels[]; }; +static inline size_t xfs_btree_cur_sizeof(unsigned int nlevels) +{ + return sizeof(struct xfs_btree_cur) + + sizeof(struct xfs_btree_level) * (nlevels); +} + /* cursor flags */ #define XFS_BTREE_LONG_PTRS (1<<0) /* pointers are 64bits long */ #define XFS_BTREE_ROOT_IN_INODE (1<<1) /* root may be variable size */ @@ -254,7 +271,6 @@ struct xfs_btree_cur #define XFS_BTREE_STAGING (1<<5) #define XFS_BTREE_IROOT_RECORDS (1<<6) /* iroot can store records */ - #define XFS_BTREE_NOERROR 0 #define XFS_BTREE_ERROR 1 |