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Btrfs: profiles filter 

Select chunks based on a given profile mask.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
hifive-unleashed-5.1
Ilya Dryomov 2012-01-16 22:04:47 +02:00
parent f43ffb60fd
commit ed25e9b26f
2 changed files with 28 additions and 0 deletions
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24
fs/btrfs/volumes.c
View File

@ -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;
}

4
fs/btrfs/volumes.h
View File

@ -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 {