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| author | Darrick J. Wong | 2017-10-18 06:37:37 +0200 |
|---|---|---|
| committer | Darrick J. Wong | 2017-10-27 00:38:24 +0200 |
| commit | cc3e0948d2686f30f49166660cf85b7e0194f365 (patch) | |
| tree | a9a14e9db4ed01641b527e9710e9213de07e8dbc /fs/xfs/libxfs | |
| parent | xfs: create helpers to scrub a metadata btree (diff) | |
| download | kernel-qcow2-linux-cc3e0948d2686f30f49166660cf85b7e0194f365.tar.gz kernel-qcow2-linux-cc3e0948d2686f30f49166660cf85b7e0194f365.tar.xz kernel-qcow2-linux-cc3e0948d2686f30f49166660cf85b7e0194f365.zip | |
xfs: scrub the shape of a metadata btree
Create a function that can check the shape of a btree -- each block
passes basic inspection and all the pointers look ok. In the next patch
we'll add the ability to check the actual keys and records stored within
the btree. Add some helper functions so that we report detailed scrub
errors in a uniform manner in dmesg. These are helper functions for
subsequent patches.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Diffstat (limited to 'fs/xfs/libxfs')
| -rw-r--r-- | fs/xfs/libxfs/xfs_btree.c | 16 | ||||
| -rw-r--r-- | fs/xfs/libxfs/xfs_btree.h | 7 |
2 files changed, 21 insertions, 2 deletions
diff --git a/fs/xfs/libxfs/xfs_btree.c b/fs/xfs/libxfs/xfs_btree.c index 8bb20e1cf57b..b3cd82a27cf4 100644 --- a/fs/xfs/libxfs/xfs_btree.c +++ b/fs/xfs/libxfs/xfs_btree.c @@ -1053,7 +1053,7 @@ xfs_btree_setbuf( } } -STATIC int +bool xfs_btree_ptr_is_null( struct xfs_btree_cur *cur, union xfs_btree_ptr *ptr) @@ -1078,7 +1078,7 @@ xfs_btree_set_ptr_null( /* * Get/set/init sibling pointers */ -STATIC void +void xfs_btree_get_sibling( struct xfs_btree_cur *cur, struct xfs_btree_block *block, @@ -4940,3 +4940,15 @@ xfs_btree_count_blocks( return xfs_btree_visit_blocks(cur, xfs_btree_count_blocks_helper, blocks); } + +/* Compare two btree pointers. */ +int64_t +xfs_btree_diff_two_ptrs( + struct xfs_btree_cur *cur, + const union xfs_btree_ptr *a, + const union xfs_btree_ptr *b) +{ + if (cur->bc_flags & XFS_BTREE_LONG_PTRS) + return (int64_t)be64_to_cpu(a->l) - be64_to_cpu(b->l); + return (int64_t)be32_to_cpu(a->s) - be32_to_cpu(b->s); +} diff --git a/fs/xfs/libxfs/xfs_btree.h b/fs/xfs/libxfs/xfs_btree.h index 3f8001de2493..be82f41a5240 100644 --- a/fs/xfs/libxfs/xfs_btree.h +++ b/fs/xfs/libxfs/xfs_btree.h @@ -534,5 +534,12 @@ int xfs_btree_lookup_get_block(struct xfs_btree_cur *cur, int level, union xfs_btree_ptr *pp, struct xfs_btree_block **blkp); struct xfs_btree_block *xfs_btree_get_block(struct xfs_btree_cur *cur, int level, struct xfs_buf **bpp); +bool xfs_btree_ptr_is_null(struct xfs_btree_cur *cur, union xfs_btree_ptr *ptr); +int64_t xfs_btree_diff_two_ptrs(struct xfs_btree_cur *cur, + const union xfs_btree_ptr *a, + const union xfs_btree_ptr *b); +void xfs_btree_get_sibling(struct xfs_btree_cur *cur, + struct xfs_btree_block *block, + union xfs_btree_ptr *ptr, int lr); #endif /* __XFS_BTREE_H__ */ |