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-rw-r--r--fs/btrfs/volumes.c54
1 files changed, 12 insertions, 42 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 0e925ce..8bffb91 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -3120,14 +3120,13 @@ int btrfs_balance(struct btrfs_balance_control *bctl,
allowed = BTRFS_AVAIL_ALLOC_BIT_SINGLE;
if (num_devices == 1)
allowed |= BTRFS_BLOCK_GROUP_DUP;
- else if (num_devices < 4)
+ else if (num_devices > 1)
allowed |= (BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1);
- else
- allowed |= (BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1 |
- BTRFS_BLOCK_GROUP_RAID10 |
- BTRFS_BLOCK_GROUP_RAID5 |
- BTRFS_BLOCK_GROUP_RAID6);
-
+ if (num_devices > 2)
+ allowed |= BTRFS_BLOCK_GROUP_RAID5;
+ if (num_devices > 3)
+ allowed |= (BTRFS_BLOCK_GROUP_RAID10 |
+ BTRFS_BLOCK_GROUP_RAID6);
if ((bctl->data.flags & BTRFS_BALANCE_ARGS_CONVERT) &&
(!alloc_profile_is_valid(bctl->data.target, 1) ||
(bctl->data.target & ~allowed))) {
@@ -5019,42 +5018,16 @@ int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree,
return 0;
}
-static void *merge_stripe_index_into_bio_private(void *bi_private,
- unsigned int stripe_index)
-{
- /*
- * with single, dup, RAID0, RAID1 and RAID10, stripe_index is
- * at most 1.
- * The alternative solution (instead of stealing bits from the
- * pointer) would be to allocate an intermediate structure
- * that contains the old private pointer plus the stripe_index.
- */
- BUG_ON((((uintptr_t)bi_private) & 3) != 0);
- BUG_ON(stripe_index > 3);
- return (void *)(((uintptr_t)bi_private) | stripe_index);
-}
-
-static struct btrfs_bio *extract_bbio_from_bio_private(void *bi_private)
-{
- return (struct btrfs_bio *)(((uintptr_t)bi_private) & ~((uintptr_t)3));
-}
-
-static unsigned int extract_stripe_index_from_bio_private(void *bi_private)
-{
- return (unsigned int)((uintptr_t)bi_private) & 3;
-}
-
static void btrfs_end_bio(struct bio *bio, int err)
{
- struct btrfs_bio *bbio = extract_bbio_from_bio_private(bio->bi_private);
+ struct btrfs_bio *bbio = bio->bi_private;
int is_orig_bio = 0;
if (err) {
atomic_inc(&bbio->error);
if (err == -EIO || err == -EREMOTEIO) {
unsigned int stripe_index =
- extract_stripe_index_from_bio_private(
- bio->bi_private);
+ btrfs_io_bio(bio)->stripe_index;
struct btrfs_device *dev;
BUG_ON(stripe_index >= bbio->num_stripes);
@@ -5084,8 +5057,7 @@ static void btrfs_end_bio(struct bio *bio, int err)
}
bio->bi_private = bbio->private;
bio->bi_end_io = bbio->end_io;
- bio->bi_bdev = (struct block_device *)
- (unsigned long)bbio->mirror_num;
+ btrfs_io_bio(bio)->mirror_num = bbio->mirror_num;
/* only send an error to the higher layers if it is
* beyond the tolerance of the btrfs bio
*/
@@ -5211,8 +5183,7 @@ static void submit_stripe_bio(struct btrfs_root *root, struct btrfs_bio *bbio,
struct btrfs_device *dev = bbio->stripes[dev_nr].dev;
bio->bi_private = bbio;
- bio->bi_private = merge_stripe_index_into_bio_private(
- bio->bi_private, (unsigned int)dev_nr);
+ btrfs_io_bio(bio)->stripe_index = dev_nr;
bio->bi_end_io = btrfs_end_bio;
bio->bi_sector = physical >> 9;
#ifdef DEBUG
@@ -5273,8 +5244,7 @@ static void bbio_error(struct btrfs_bio *bbio, struct bio *bio, u64 logical)
if (atomic_dec_and_test(&bbio->stripes_pending)) {
bio->bi_private = bbio->private;
bio->bi_end_io = bbio->end_io;
- bio->bi_bdev = (struct block_device *)
- (unsigned long)bbio->mirror_num;
+ btrfs_io_bio(bio)->mirror_num = bbio->mirror_num;
bio->bi_sector = logical >> 9;
kfree(bbio);
bio_endio(bio, -EIO);
@@ -5352,7 +5322,7 @@ int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio,
}
if (dev_nr < total_devs - 1) {
- bio = bio_clone(first_bio, GFP_NOFS);
+ bio = btrfs_bio_clone(first_bio, GFP_NOFS);
BUG_ON(!bio); /* -ENOMEM */
} else {
bio = first_bio;
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