Commit 409d404b authored by Ilya Dryomov's avatar Ilya Dryomov
Browse files

Btrfs: devid filter 



Relocate chunks which have at least one stripe located on a device with
devid X.

Signed-off-by: default avatarIlya Dryomov <idryomov@gmail.com>
parent 5ce5b3c0

fs/btrfs/volumes.c

+23 −0
Original line number Diff line number Diff line
@@ -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;

}

fs/btrfs/volumes.h

+1 −0
Original line number Diff line number Diff line
@@ -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 {