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| author | Gabríel Arthúr Pétursson <gabriel@system.is> | 2015-09-29 01:32:41 +0300 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2015-10-27 05:38:29 +0300 |
| commit | dee32d0ac3719ef8d640efaf0884111df444730f (patch) | |
| tree | 26664ba9632bdac8539e8cfec61807f8e7d120bd /fs/btrfs | |
| parent | 12907fc79818a62a2478f84f7795afa774bf7f9c (diff) | |
| download | linux-dee32d0ac3719ef8d640efaf0884111df444730f.tar.xz | |
btrfs: add balance filter for stripes
Balance block groups which have the given number of stripes, defined by
a range min..max. This is useful to selectively rebalance only chunks
that do not span enough devices, applies to RAID0/10/5/6.
Signed-off-by: Gabríel Arthúr Pétursson <gabriel@system.is>
[ renamed bargs members, added to the UAPI, wrote the changelog ]
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/ctree.h | 9 | ||||
| -rw-r--r-- | fs/btrfs/volumes.c | 19 | ||||
| -rw-r--r-- | fs/btrfs/volumes.h | 1 |
3 files changed, 28 insertions, 1 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 460cd69b405e..8ccbf4317a4a 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -859,7 +859,14 @@ struct btrfs_disk_balance_args { }; }; - __le64 unused[7]; + /* + * Process chunks that cross stripes_min..stripes_max devices, + * BTRFS_BALANCE_ARGS_STRIPES_RANGE + */ + __le32 stripes_min; + __le32 stripes_max; + + __le64 unused[6]; } __attribute__ ((__packed__)); /* diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index e2fdd2e01104..9f5d16739880 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -3220,6 +3220,19 @@ static int chunk_vrange_filter(struct extent_buffer *leaf, return 1; } +static int chunk_stripes_range_filter(struct extent_buffer *leaf, + struct btrfs_chunk *chunk, + struct btrfs_balance_args *bargs) +{ + int num_stripes = btrfs_chunk_num_stripes(leaf, chunk); + + if (bargs->stripes_min <= num_stripes + && num_stripes <= bargs->stripes_max) + return 0; + + return 1; +} + static int chunk_soft_convert_filter(u64 chunk_type, struct btrfs_balance_args *bargs) { @@ -3286,6 +3299,12 @@ static int should_balance_chunk(struct btrfs_root *root, return 0; } + /* stripes filter */ + if ((bargs->flags & BTRFS_BALANCE_ARGS_STRIPES_RANGE) && + chunk_stripes_range_filter(leaf, chunk, bargs)) { + return 0; + } + /* soft profile changing mode */ if ((bargs->flags & BTRFS_BALANCE_ARGS_SOFT) && chunk_soft_convert_filter(chunk_type, bargs)) { diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index 628d4e17019d..a5bf224d3c65 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -381,6 +381,7 @@ struct map_lookup { #define BTRFS_BALANCE_ARGS_VRANGE (1ULL << 4) #define BTRFS_BALANCE_ARGS_LIMIT (1ULL << 5) #define BTRFS_BALANCE_ARGS_LIMIT_RANGE (1ULL << 6) +#define BTRFS_BALANCE_ARGS_STRIPES_RANGE (1ULL << 7) #define BTRFS_BALANCE_ARGS_MASK \ (BTRFS_BALANCE_ARGS_PROFILES | \ |