diff options
| author | David Sterba <dsterba@suse.cz> | 2014-02-07 17:34:12 +0400 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2014-04-07 21:41:53 +0400 |
| commit | 36523e95129c0e69bf1592cd009261b1c6d96e77 (patch) | |
| tree | f210c9e347318a954dec2e7a4d367f76ebf0da9e /fs/btrfs/ctree.h | |
| parent | 800ee2247f483b6d05ed47ef3bbc90b56451746c (diff) | |
| download | linux-36523e95129c0e69bf1592cd009261b1c6d96e77.tar.xz | |
btrfs: export global block reserve size as space_info
Introduce a block group type bit for a global reserve and fill the space
info for SPACE_INFO ioctl. This should replace the newly added ioctl
(01e219e8069516cdb98594d417b8bb8d906ed30d) to get just the 'size' part
of the global reserve, while the actual usage can be now visible in the
'btrfs fi df' output during ENOSPC stress.
The unpatched userspace tools will show the blockgroup as 'unknown'.
CC: Jeff Mahoney <jeffm@suse.com>
CC: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index d8a669ed5506..ad1a5943a923 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -987,7 +987,8 @@ struct btrfs_dev_replace_item { #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6) #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7) #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8) -#define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE +#define BTRFS_BLOCK_GROUP_RESERVED (BTRFS_AVAIL_ALLOC_BIT_SINGLE | \ + BTRFS_SPACE_INFO_GLOBAL_RSV) enum btrfs_raid_types { BTRFS_RAID_RAID10, @@ -1019,6 +1020,12 @@ enum btrfs_raid_types { */ #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48) +/* + * A fake block group type that is used to communicate global block reserve + * size to userspace via the SPACE_INFO ioctl. + */ +#define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49) + #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \ BTRFS_AVAIL_ALLOC_BIT_SINGLE) |