[PATCH 040/119] xfs: create helpers for mapping, unmapping, and converting file fork extents
From: Darrick J. Wong <hidden>
Date: 2016-06-17 01:22:15
Also in:
linux-fsdevel
Subsystem:
filesystems (vfs and infrastructure), the rest, xfs filesystem · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds, Carlos Maiolino
Create two helper functions to assist with mapping, unmapping, and converting flag status of extents in a file's data/attr forks. For non-shared files we can use the _alloc, _free, and _convert functions; when reflink comes these functions will be augmented to deal with shared extents. Signed-off-by: Darrick J. Wong <redacted> --- fs/xfs/libxfs/xfs_rmap.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+)
diff --git a/fs/xfs/libxfs/xfs_rmap.c b/fs/xfs/libxfs/xfs_rmap.c
index f92eaa1..76fc5c2 100644
--- a/fs/xfs/libxfs/xfs_rmap.c
+++ b/fs/xfs/libxfs/xfs_rmap.c@@ -1123,11 +1123,53 @@ done: return error; } +/* + * Convert an unwritten extent to a real extent or vice versa. + */ +STATIC int +xfs_rmap_convert( + struct xfs_btree_cur *cur, + xfs_agblock_t bno, + xfs_extlen_t len, + bool unwritten, + struct xfs_owner_info *oinfo) +{ + return __xfs_rmap_convert(cur, bno, len, unwritten, oinfo); +} + #undef NEW #undef LEFT #undef RIGHT #undef PREV +/* + * Find an extent in the rmap btree and unmap it. + */ +STATIC int +xfs_rmap_unmap( + struct xfs_btree_cur *cur, + xfs_agblock_t bno, + xfs_extlen_t len, + bool unwritten, + struct xfs_owner_info *oinfo) +{ + return __xfs_rmap_free(cur, bno, len, unwritten, oinfo); +} + +/* + * Find an extent in the rmap btree and map it. + */ +STATIC int +xfs_rmap_map( + struct xfs_btree_cur *cur, + xfs_agblock_t bno, + xfs_extlen_t len, + bool unwritten, + struct xfs_owner_info *oinfo) +{ + return __xfs_rmap_alloc(cur, bno, len, unwritten, oinfo); +} + struct xfs_rmapbt_query_range_info { xfs_rmapbt_query_range_fn fn; void *priv;
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