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| author | Christoph Hellwig <hch@infradead.org> | 2008-10-30 16:56:32 +1100 |
|---|---|---|
| committer | Lachlan McIlroy <lachlan@sgi.com> | 2008-10-30 16:56:32 +1100 |
| commit | 278d0ca14e889c3932a05d1a68675252a12b3466 (patch) | |
| tree | a228d171d4aded60b27639e30eca1bf58ed7daa6 /fs/xfs/xfs_btree.h | |
| parent | 38bb74237d2d94c1aced2ec626d7d0f317e360da (diff) | |
| download | linux-278d0ca14e889c3932a05d1a68675252a12b3466.tar.gz linux-278d0ca14e889c3932a05d1a68675252a12b3466.tar.bz2 linux-278d0ca14e889c3932a05d1a68675252a12b3466.zip | |
[XFS] implement generic xfs_btree_update
From: Dave Chinner <dgc@sgi.com>
The most complicated part here is the lastrec tracking for the alloc
btree. Most logic is in the update_lastrec method which has to do some
hopefully good enough dirty magic to maintain it.
[hch: split out from bigger patch and a rework of the lastrec
logic]
SGI-PV: 985583
SGI-Modid: xfs-linux-melb:xfs-kern:32194a
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Bill O'Donnell <billodo@sgi.com>
Signed-off-by: David Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs/xfs_btree.h')
| -rw-r--r-- | fs/xfs/xfs_btree.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/fs/xfs/xfs_btree.h b/fs/xfs/xfs_btree.h index ac3f527b0ac4..c3bfa5556c19 100644 --- a/fs/xfs/xfs_btree.h +++ b/fs/xfs/xfs_btree.h @@ -187,6 +187,12 @@ struct xfs_btree_ops { /* cursor operations */ struct xfs_btree_cur *(*dup_cursor)(struct xfs_btree_cur *); + /* update last record information */ + void (*update_lastrec)(struct xfs_btree_cur *cur, + struct xfs_btree_block *block, + union xfs_btree_rec *rec, + int ptr, int reason); + /* records in block/level */ int (*get_maxrecs)(struct xfs_btree_cur *cur, int level); @@ -221,6 +227,12 @@ struct xfs_btree_ops { }; /* + * Reasons for the update_lastrec method to be called. + */ +#define LASTREC_UPDATE 0 + + +/* * Btree cursor structure. * This collects all information needed by the btree code in one place. */ @@ -264,6 +276,7 @@ typedef struct xfs_btree_cur /* 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 */ +#define XFS_BTREE_LASTREC_UPDATE (1<<2) /* track last rec externally */ #define XFS_BTREE_NOERROR 0 @@ -519,6 +532,7 @@ int xfs_btree_increment(struct xfs_btree_cur *, int, int *); int xfs_btree_decrement(struct xfs_btree_cur *, int, int *); int xfs_btree_lookup(struct xfs_btree_cur *, xfs_lookup_t, int *); int xfs_btree_updkey(struct xfs_btree_cur *, union xfs_btree_key *, int); +int xfs_btree_update(struct xfs_btree_cur *, union xfs_btree_rec *); /* * Helpers. |