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authorJan Schmidt <list.btrfs@jan-o-sch.net>2011-06-13 21:52:59 +0400
committerJan Schmidt <list.btrfs@jan-o-sch.net>2011-09-29 14:54:27 +0400
commita542ad1bafc7df9fc16de8a6894b350a4df75572 (patch)
treeece4cabbed85ceea326233735134863b2feec0e6 /fs/btrfs/ioctl.h
parent0a7a0519d1789f3a222849421dbe91b6bddb88f5 (diff)
downloadlinux-a542ad1bafc7df9fc16de8a6894b350a4df75572.tar.xz
btrfs: added helper functions to iterate backrefs
These helper functions iterate back references and call a function for each backref. There is also a function to resolve an inode to a path in the file system. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Diffstat (limited to 'fs/btrfs/ioctl.h')
-rw-r--r--fs/btrfs/ioctl.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/btrfs/ioctl.h b/fs/btrfs/ioctl.h
index ad1ea789fcb4..1857e3871843 100644
--- a/fs/btrfs/ioctl.h
+++ b/fs/btrfs/ioctl.h
@@ -193,6 +193,17 @@ struct btrfs_ioctl_space_args {
struct btrfs_ioctl_space_info spaces[0];
};
+struct btrfs_data_container {
+ __u32 bytes_left; /* out -- bytes not needed to deliver output */
+ __u32 bytes_missing; /* out -- additional bytes needed for result */
+ __u32 elem_cnt; /* out */
+ __u32 elem_missed; /* out */
+ union {
+ char *str[0]; /* out */
+ __u64 val[0]; /* out */
+ };
+};
+
#define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
struct btrfs_ioctl_vol_args)
#define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \