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Btrfs: add a new "type" field into the block reservation structure

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Sometimes we need choose the method of the reservation according to the type
of the block reservation, such as the reservation for the delayed inode update.
Now we identify the type just by comparing the address of the reservation
variants, it is very ugly if it is a temporary one because we need compare it
with all the common reservation variants. So we add a new "type" field to keep
the type the reservation variants.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
This commit is contained in:
Miao Xie
2012-09-06 04:02:28 -06:00
committed by Chris Mason
parent 6352b91da1
commit 66d8f3dd1c
8 changed files with 39 additions and 22 deletions
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8
fs/btrfs/extent-tree.c
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@@ -4108,13 +4108,15 @@ static int block_rsv_migrate_bytes(struct btrfs_block_rsv *src,
return 0;
}
void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv)
void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type)
{
memset(rsv, 0, sizeof(*rsv));
spin_lock_init(&rsv->lock);
rsv->type = type;
}
struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root)
struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
unsigned short type)
{
struct btrfs_block_rsv *block_rsv;
struct btrfs_fs_info *fs_info = root->fs_info;
@@ -4123,7 +4125,7 @@ struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root)
if (!block_rsv)
return NULL;
btrfs_init_block_rsv(block_rsv);
btrfs_init_block_rsv(block_rsv, type);
block_rsv->space_info = __find_space_info(fs_info,
BTRFS_BLOCK_GROUP_METADATA);
return block_rsv;