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btrfs: export helpers for subvolume name/id resolution

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The functions will be used outside of export.c and super.c to allow
resolving subvolume name from a given id, eg. for subvolume deletion by
id ioctl.

Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ split from the next patch ]
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Marcos Paulo de Souza
2020-02-21 14:56:12 +01:00
committed by David Sterba
parent 748449cdbe
commit c0c907a47d
4 changed files with 15 additions and 8 deletions
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5
fs/btrfs/export.h
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@@ -18,4 +18,9 @@ struct btrfs_fid {
u64 parent_root_objectid;
} __attribute__ ((packed));
struct dentry *btrfs_get_dentry(struct super_block *sb, u64 objectid,
u64 root_objectid, u32 generation,
int check_generation);
struct dentry *btrfs_get_parent(struct dentry *child);
#endif