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| author | David Sterba <dsterba@suse.com> | 2015-10-10 17:16:50 +0200 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2015-10-27 03:38:28 +0100 |
| commit | 12907fc79818a62a2478f84f7795afa774bf7f9c (patch) | |
| tree | c7df6fd783c99feef090a00c38e7268515488430 /fs/btrfs/volumes.h | |
| parent | btrfs: fix use after free iterating extrefs (diff) | |
| download | linux-12907fc79818a62a2478f84f7795afa774bf7f9c.tar.xz linux-12907fc79818a62a2478f84f7795afa774bf7f9c.zip | |
btrfs: extend balance filter limit to take minimum and maximum
The 'limit' filter is underdesigned, it should have been a range for
[min,max], with some relaxed semantics when one of the bounds is
missing. Besides that, using a full u64 for a single value is a waste of
bytes.
Let's fix both by extending the use of the u64 bytes for the [min,max]
range. This can be done in a backward compatible way, the range will be
interpreted only if the appropriate flag is set
(BTRFS_BALANCE_ARGS_LIMIT_RANGE).
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/volumes.h')
| -rw-r--r-- | fs/btrfs/volumes.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index b8e64ea984f1..628d4e17019d 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -380,6 +380,7 @@ struct map_lookup { #define BTRFS_BALANCE_ARGS_DRANGE (1ULL << 3) #define BTRFS_BALANCE_ARGS_VRANGE (1ULL << 4) #define BTRFS_BALANCE_ARGS_LIMIT (1ULL << 5) +#define BTRFS_BALANCE_ARGS_LIMIT_RANGE (1ULL << 6) #define BTRFS_BALANCE_ARGS_MASK \ (BTRFS_BALANCE_ARGS_PROFILES | \ |