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authorDavid Sterba <dsterba@suse.cz>2014-05-07 18:17:06 +0200
committerChris Mason <clm@fb.com>2014-06-09 17:20:27 -0700
commit80a773fbfc2d6b5b2478377e8ac271d495f55e73 (patch)
tree3e32cba85039f51ae9dc5c189dbeb5f58de04989 /include/uapi/linux/btrfs.h
parent7d824b6f9cf28917d8a05891ef423fb0e4e34c69 (diff)
btrfs: retrieve more info from FS_INFO ioctl
Provide the basic information about filesystem through the ioctl: * b-tree node size (same as leaf size) * sector size * expected alignment of CLONE_RANGE and EXTENT_SAME ioctl arguments Backward compatibility: if the values are 0, kernel does not provide this information, the applications should ignore them. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'include/uapi/linux/btrfs.h')
-rw-r--r--include/uapi/linux/btrfs.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/include/uapi/linux/btrfs.h b/include/uapi/linux/btrfs.h
index 901a3c563f60..7554fd381a56 100644
--- a/include/uapi/linux/btrfs.h
+++ b/include/uapi/linux/btrfs.h
@@ -181,7 +181,11 @@ struct btrfs_ioctl_fs_info_args {
__u64 max_id; /* out */
__u64 num_devices; /* out */
__u8 fsid[BTRFS_FSID_SIZE]; /* out */
- __u64 reserved[124]; /* pad to 1k */
+ __u32 nodesize; /* out */
+ __u32 sectorsize; /* out */
+ __u32 clone_alignment; /* out */
+ __u32 reserved32;
+ __u64 reserved[122]; /* pad to 1k */
};
struct btrfs_ioctl_feature_flags {