btrfs: add dev maxs limit for __btrfs_alloc_chunk in kernel space
For RAID0,5,6,10, For system chunk, there shouldn't be too many stripes to make a btrfs_chunk that exceeds BTRFS_SYSTEM_CHUNK_ARRAY_SIZE For data/meta chunk, there shouldn't be too many stripes to make a btrfs_chunk that exceeds a leaf. Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com> Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
parent
5f43f86e3f
commit
23f8f9b7ca
|
@ -4027,6 +4027,16 @@ static void check_raid56_incompat_flag(struct btrfs_fs_info *info, u64 type)
|
|||
btrfs_set_fs_incompat(info, RAID56);
|
||||
}
|
||||
|
||||
#define BTRFS_MAX_DEVS(r) ((BTRFS_LEAF_DATA_SIZE(r) \
|
||||
- sizeof(struct btrfs_item) \
|
||||
- sizeof(struct btrfs_chunk)) \
|
||||
/ sizeof(struct btrfs_stripe) + 1)
|
||||
|
||||
#define BTRFS_MAX_DEVS_SYS_CHUNK ((BTRFS_SYSTEM_CHUNK_ARRAY_SIZE \
|
||||
- 2 * sizeof(struct btrfs_disk_key) \
|
||||
- 2 * sizeof(struct btrfs_chunk)) \
|
||||
/ sizeof(struct btrfs_stripe) + 1)
|
||||
|
||||
static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
|
||||
struct btrfs_root *extent_root, u64 start,
|
||||
u64 type)
|
||||
|
@ -4076,6 +4086,8 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
|
|||
if (type & BTRFS_BLOCK_GROUP_DATA) {
|
||||
max_stripe_size = 1024 * 1024 * 1024;
|
||||
max_chunk_size = 10 * max_stripe_size;
|
||||
if (!devs_max)
|
||||
devs_max = BTRFS_MAX_DEVS(info->chunk_root);
|
||||
} else if (type & BTRFS_BLOCK_GROUP_METADATA) {
|
||||
/* for larger filesystems, use larger metadata chunks */
|
||||
if (fs_devices->total_rw_bytes > 50ULL * 1024 * 1024 * 1024)
|
||||
|
@ -4083,9 +4095,13 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
|
|||
else
|
||||
max_stripe_size = 256 * 1024 * 1024;
|
||||
max_chunk_size = max_stripe_size;
|
||||
if (!devs_max)
|
||||
devs_max = BTRFS_MAX_DEVS(info->chunk_root);
|
||||
} else if (type & BTRFS_BLOCK_GROUP_SYSTEM) {
|
||||
max_stripe_size = 32 * 1024 * 1024;
|
||||
max_chunk_size = 2 * max_stripe_size;
|
||||
if (!devs_max)
|
||||
devs_max = BTRFS_MAX_DEVS_SYS_CHUNK;
|
||||
} else {
|
||||
btrfs_err(info, "invalid chunk type 0x%llx requested\n",
|
||||
type);
|
||||
|
|
Loading…
Reference in a new issue