From 14861c47400b4a1669956d8b027fe4b7855e39f1 Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Wed, 9 May 2018 10:02:01 -0700 Subject: [PATCH] xfs: add helpers to calculate btree size Add a bunch of helper functions that calculate the sizes of various btrees. These will be used to repair btrees and btree headers. Signed-off-by: Darrick J. Wong Reviewed-by: Dave Chinner --- fs/xfs/libxfs/xfs_alloc_btree.c | 9 +++++++++ fs/xfs/libxfs/xfs_alloc_btree.h | 2 ++ fs/xfs/libxfs/xfs_bmap_btree.c | 9 +++++++++ fs/xfs/libxfs/xfs_bmap_btree.h | 3 +++ fs/xfs/libxfs/xfs_btree.c | 4 ++-- fs/xfs/libxfs/xfs_btree.h | 2 +- fs/xfs/libxfs/xfs_ialloc_btree.c | 9 +++++++++ fs/xfs/libxfs/xfs_ialloc_btree.h | 2 ++ 8 files changed, 37 insertions(+), 3 deletions(-) diff --git a/fs/xfs/libxfs/xfs_alloc_btree.c b/fs/xfs/libxfs/xfs_alloc_btree.c index b451649b..18aec7a 100644 --- a/fs/xfs/libxfs/xfs_alloc_btree.c +++ b/fs/xfs/libxfs/xfs_alloc_btree.c @@ -547,3 +547,12 @@ xfs_allocbt_maxrecs( return blocklen / sizeof(xfs_alloc_rec_t); return blocklen / (sizeof(xfs_alloc_key_t) + sizeof(xfs_alloc_ptr_t)); } + +/* Calculate the freespace btree size for some records. */ +xfs_extlen_t +xfs_allocbt_calc_size( + struct xfs_mount *mp, + unsigned long long len) +{ + return xfs_btree_calc_size(mp->m_alloc_mnr, len); +} diff --git a/fs/xfs/libxfs/xfs_alloc_btree.h b/fs/xfs/libxfs/xfs_alloc_btree.h index 45e189e..2fd5472 100644 --- a/fs/xfs/libxfs/xfs_alloc_btree.h +++ b/fs/xfs/libxfs/xfs_alloc_btree.h @@ -61,5 +61,7 @@ extern struct xfs_btree_cur *xfs_allocbt_init_cursor(struct xfs_mount *, struct xfs_trans *, struct xfs_buf *, xfs_agnumber_t, xfs_btnum_t); extern int xfs_allocbt_maxrecs(struct xfs_mount *, int, int); +extern xfs_extlen_t xfs_allocbt_calc_size(struct xfs_mount *mp, + unsigned long long len); #endif /* __XFS_ALLOC_BTREE_H__ */ diff --git a/fs/xfs/libxfs/xfs_bmap_btree.c b/fs/xfs/libxfs/xfs_bmap_btree.c index d89d06b..ac9d4ae 100644 --- a/fs/xfs/libxfs/xfs_bmap_btree.c +++ b/fs/xfs/libxfs/xfs_bmap_btree.c @@ -660,3 +660,12 @@ xfs_bmbt_change_owner( xfs_btree_del_cursor(cur, error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); return error; } + +/* Calculate the bmap btree size for some records. */ +unsigned long long +xfs_bmbt_calc_size( + struct xfs_mount *mp, + unsigned long long len) +{ + return xfs_btree_calc_size(mp->m_bmap_dmnr, len); +} diff --git a/fs/xfs/libxfs/xfs_bmap_btree.h b/fs/xfs/libxfs/xfs_bmap_btree.h index e450574..fb3cd2d 100644 --- a/fs/xfs/libxfs/xfs_bmap_btree.h +++ b/fs/xfs/libxfs/xfs_bmap_btree.h @@ -118,4 +118,7 @@ extern int xfs_bmbt_change_owner(struct xfs_trans *tp, struct xfs_inode *ip, extern struct xfs_btree_cur *xfs_bmbt_init_cursor(struct xfs_mount *, struct xfs_trans *, struct xfs_inode *, int); +extern unsigned long long xfs_bmbt_calc_size(struct xfs_mount *mp, + unsigned long long len); + #endif /* __XFS_BMAP_BTREE_H__ */ diff --git a/fs/xfs/libxfs/xfs_btree.c b/fs/xfs/libxfs/xfs_btree.c index ac7d664..2a8e01a 100644 --- a/fs/xfs/libxfs/xfs_btree.c +++ b/fs/xfs/libxfs/xfs_btree.c @@ -4836,14 +4836,14 @@ xfs_btree_query_all( * Calculate the number of blocks needed to store a given number of records * in a short-format (per-AG metadata) btree. */ -xfs_extlen_t +unsigned long long xfs_btree_calc_size( uint *limits, unsigned long long len) { int level; int maxrecs; - xfs_extlen_t rval; + unsigned long long rval; maxrecs = limits[0]; for (level = 0, rval = 0; len > 1; level++) { diff --git a/fs/xfs/libxfs/xfs_btree.h b/fs/xfs/libxfs/xfs_btree.h index 9227159..3236b3a 100644 --- a/fs/xfs/libxfs/xfs_btree.h +++ b/fs/xfs/libxfs/xfs_btree.h @@ -482,7 +482,7 @@ xfs_failaddr_t xfs_btree_lblock_verify(struct xfs_buf *bp, unsigned int max_recs); uint xfs_btree_compute_maxlevels(uint *limits, unsigned long len); -xfs_extlen_t xfs_btree_calc_size(uint *limits, unsigned long long len); +unsigned long long xfs_btree_calc_size(uint *limits, unsigned long long len); /* return codes */ #define XFS_BTREE_QUERY_RANGE_CONTINUE 0 /* keep iterating */ diff --git a/fs/xfs/libxfs/xfs_ialloc_btree.c b/fs/xfs/libxfs/xfs_ialloc_btree.c index 367e9a0..ba053a4 100644 --- a/fs/xfs/libxfs/xfs_ialloc_btree.c +++ b/fs/xfs/libxfs/xfs_ialloc_btree.c @@ -608,3 +608,12 @@ xfs_finobt_calc_reserves( *used += tree_len; return 0; } + +/* Calculate the inobt btree size for some records. */ +xfs_extlen_t +xfs_iallocbt_calc_size( + struct xfs_mount *mp, + unsigned long long len) +{ + return xfs_btree_calc_size(mp->m_inobt_mnr, len); +} diff --git a/fs/xfs/libxfs/xfs_ialloc_btree.h b/fs/xfs/libxfs/xfs_ialloc_btree.h index aa81e2e..4acdd54 100644 --- a/fs/xfs/libxfs/xfs_ialloc_btree.h +++ b/fs/xfs/libxfs/xfs_ialloc_btree.h @@ -74,5 +74,7 @@ int xfs_inobt_rec_check_count(struct xfs_mount *, int xfs_finobt_calc_reserves(struct xfs_mount *mp, xfs_agnumber_t agno, xfs_extlen_t *ask, xfs_extlen_t *used); +extern xfs_extlen_t xfs_iallocbt_calc_size(struct xfs_mount *mp, + unsigned long long len); #endif /* __XFS_IALLOC_BTREE_H__ */ -- 2.7.4