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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
commit409d404b461afa9738619f249fd7f62a366b68c2 (patch)
tree38092a3be26e6bcedc5202c04c5915e12b1d64a8 /fs
parent5ce5b3c0916ba3a2e34cf648b94044adc5ef9e76 (diff)
downloadblackbird-op-linux-409d404b461afa9738619f249fd7f62a366b68c2.tar.gz
blackbird-op-linux-409d404b461afa9738619f249fd7f62a366b68c2.zip
Btrfs: devid filter
Relocate chunks which have at least one stripe located on a device with devid X. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/btrfs/volumes.c23
-rw-r--r--fs/btrfs/volumes.h1
2 files changed, 24 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index b858242374db..9ff5cd09a256 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2150,6 +2150,23 @@ static int chunk_usage_filter(struct btrfs_fs_info *fs_info, u64 chunk_offset,
return ret;
}
+static int chunk_devid_filter(struct extent_buffer *leaf,
+ struct btrfs_chunk *chunk,
+ struct btrfs_balance_args *bargs)
+{
+ struct btrfs_stripe *stripe;
+ int num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
+ int i;
+
+ for (i = 0; i < num_stripes; i++) {
+ stripe = btrfs_stripe_nr(chunk, i);
+ if (btrfs_stripe_devid(leaf, stripe) == bargs->devid)
+ return 0;
+ }
+
+ return 1;
+}
+
static int should_balance_chunk(struct btrfs_root *root,
struct extent_buffer *leaf,
struct btrfs_chunk *chunk, u64 chunk_offset)
@@ -2183,6 +2200,12 @@ static int should_balance_chunk(struct btrfs_root *root,
return 0;
}
+ /* devid filter */
+ if ((bargs->flags & BTRFS_BALANCE_ARGS_DEVID) &&
+ chunk_devid_filter(leaf, chunk, bargs)) {
+ return 0;
+ }
+
return 1;
}
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index eee77fcf812a..7cfec03c29b8 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -201,6 +201,7 @@ struct map_lookup {
*/
#define BTRFS_BALANCE_ARGS_PROFILES (1ULL << 0)
#define BTRFS_BALANCE_ARGS_USAGE (1ULL << 1)
+#define BTRFS_BALANCE_ARGS_DEVID (1ULL << 2)
struct btrfs_balance_args;
struct btrfs_balance_control {
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