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authorDavid Sterba <dsterba@suse.cz>2014-05-07 17:37:51 +0200
committerChris Mason <clm@fb.com>2014-06-09 17:20:26 -0700
commit7d824b6f9cf28917d8a05891ef423fb0e4e34c69 (patch)
treea362fbac437c6d997c9d389c9c934537d36fdb98 /fs/btrfs/volumes.h
parentfc19c5e73645f95d3eca12b4e91e7b56faf1e4a4 (diff)
downloadlinux-7d824b6f9cf28917d8a05891ef423fb0e4e34c69.tar.bz2
btrfs: balance filter: add limit of processed chunks
This started as debugging helper, to watch the effects of converting between raid levels on multiple devices, but could be useful standalone. In my case the usage filter was not finegrained enough and led to converting too many chunks at once. Another example use is in connection with drange+devid or vrange filters that allow to work with a specific chunk or even with a chunk on a given device. The limit filter applies last, the value of 0 means no limiting. CC: Ilya Dryomov <idryomov@gmail.com> CC: Hugo Mills <hugo@carfax.org.uk> Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/volumes.h')
-rw-r--r--fs/btrfs/volumes.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 80754f9dd3df..1a15bbeb65e2 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -255,6 +255,7 @@ struct map_lookup {
#define BTRFS_BALANCE_ARGS_DEVID (1ULL << 2)
#define BTRFS_BALANCE_ARGS_DRANGE (1ULL << 3)
#define BTRFS_BALANCE_ARGS_VRANGE (1ULL << 4)
+#define BTRFS_BALANCE_ARGS_LIMIT (1ULL << 5)
/*
* Profile changing flags. When SOFT is set we won't relocate chunk if