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authorIlya Dryomov <idryomov@gmail.com>2012-01-16 22:04:47 +0200
committerIlya Dryomov <idryomov@gmail.com>2012-01-16 22:04:47 +0200
commited25e9b26f898d8d63ae4a836489f1923534143b (patch)
tree89ee253d15ef46b430de0435c068b66267ce829b /fs
parentf43ffb60fd94e98be02780944e182ade6653b916 (diff)
downloadop-kernel-dev-ed25e9b26f898d8d63ae4a836489f1923534143b.zip
op-kernel-dev-ed25e9b26f898d8d63ae4a836489f1923534143b.tar.gz
Btrfs: profiles filter
Select chunks based on a given profile mask. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/btrfs/volumes.c24
-rw-r--r--fs/btrfs/volumes.h4
2 files changed, 28 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 91bbf6e..447bd42 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2102,6 +2102,24 @@ static void unset_balance_control(struct btrfs_fs_info *fs_info)
kfree(bctl);
}
+/*
+ * Balance filters. Return 1 if chunk should be filtered out
+ * (should not be balanced).
+ */
+static int chunk_profiles_filter(u64 chunk_profile,
+ struct btrfs_balance_args *bargs)
+{
+ chunk_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK;
+
+ if (chunk_profile == 0)
+ chunk_profile = BTRFS_AVAIL_ALLOC_BIT_SINGLE;
+
+ if (bargs->profiles & chunk_profile)
+ return 0;
+
+ return 1;
+}
+
static int should_balance_chunk(struct btrfs_root *root,
struct extent_buffer *leaf,
struct btrfs_chunk *chunk, u64 chunk_offset)
@@ -2123,6 +2141,12 @@ static int should_balance_chunk(struct btrfs_root *root,
else if (chunk_type & BTRFS_BLOCK_GROUP_METADATA)
bargs = &bctl->meta;
+ /* profiles filter */
+ if ((bargs->flags & BTRFS_BALANCE_ARGS_PROFILES) &&
+ chunk_profiles_filter(chunk_type, bargs)) {
+ return 0;
+ }
+
return 1;
}
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 003e542..fb20d77 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -196,6 +196,10 @@ struct map_lookup {
#define BTRFS_BALANCE_TYPE_MASK (BTRFS_BALANCE_DATA | \
BTRFS_BALANCE_SYSTEM | \
BTRFS_BALANCE_METADATA)
+/*
+ * Balance filters
+ */
+#define BTRFS_BALANCE_ARGS_PROFILES (1ULL << 0)
struct btrfs_balance_args;
struct btrfs_balance_control {
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