[PATCH 07/21] Btrfs: profiles filter
From: Ilya Dryomov <idryomov@gmail.com>
Date: 2012-01-06 14:30:55
Subsystem:
btrfs file system, filesystems (vfs and infrastructure), the rest · Maintainers:
Chris Mason, David Sterba, Alexander Viro, Christian Brauner, Linus Torvalds
Select chunks based on a given profile mask. Signed-off-by: Ilya Dryomov <idryomov@gmail.com> --- fs/btrfs/volumes.c | 24 ++++++++++++++++++++++++ fs/btrfs/volumes.h | 4 ++++ 2 files changed, 28 insertions(+), 0 deletions(-)
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 0e6cddd..315a6c2 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 7a78051..9c95c13 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 {
--
1.7.6.3