diff options
author | Omar Sandoval <osandov@fb.com> | 2016-11-14 10:43:18 -0800 |
---|---|---|
committer | David Sterba <dsterba@suse.com> | 2016-11-23 11:07:05 +0100 |
commit | 41eaae6d74ab19e111f5ba0d32454ea283a77960 (patch) | |
tree | a9405d824089c9596222763ee9f1d882beff2d43 /ctree.h | |
parent | f9a13d867b294723553a4c2299f68584c171b7e4 (diff) |
btrfs-progs: add the FREE_SPACE_TREE_VALID compat_ro bit definition
This is just the definition; we don't support it yet.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'ctree.h')
-rw-r--r-- | ctree.h | 13 |
1 files changed, 13 insertions, 0 deletions
@@ -467,6 +467,14 @@ struct btrfs_super_block { * ones specified below then we will fail to mount */ #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0) +/* + * Older kernels on big-endian systems produced broken free space tree bitmaps, + * and btrfs-progs also used to corrupt the free space tree. If this bit is + * clear, then the free space tree cannot be trusted. btrfs-progs can also + * intentionally clear this bit to ask the kernel to rebuild the free space + * tree. + */ +#define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID (1ULL << 1) #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0) #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1) @@ -493,6 +501,11 @@ struct btrfs_super_block { #define BTRFS_FEATURE_COMPAT_SUPP 0ULL +/* + * The FREE_SPACE_TREE and FREE_SPACE_TREE_VALID compat_ro bits must not be + * added here until read-write support for the free space tree is implemented in + * btrfs-progs. + */ #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL #define BTRFS_FEATURE_INCOMPAT_SUPP \ |