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| author | Ilya Dryomov <idryomov@gmail.com> | 2012-01-17 00:04:47 +0400 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2012-01-17 00:04:47 +0400 |
| commit | 409d404b461afa9738619f249fd7f62a366b68c2 (patch) | |
| tree | 38092a3be26e6bcedc5202c04c5915e12b1d64a8 /fs | |
| parent | 5ce5b3c0916ba3a2e34cf648b94044adc5ef9e76 (diff) | |
| download | linux-409d404b461afa9738619f249fd7f62a366b68c2.tar.xz | |
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.c | 23 | ||||
| -rw-r--r-- | fs/btrfs/volumes.h | 1 |
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 { |