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authorDavid Sterba <dsterba@suse.com>2019-06-18 20:00:11 +0200
committerDavid Sterba <dsterba@suse.com>2019-07-02 12:30:51 +0200
commit4f080f571192b0347f45b5709a291af473824484 (patch)
tree2a10c9066c0a9e7d361133e568885d69c73aea2c
parentf262fa8de6a2510e13a59ad3ecdcb0f2d468bb98 (diff)
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btrfs: use raid_attr to adjust minimal stripe size in btrfs_calc_avail_data_space
Special case for DUP can be replaced by lookup to the attribute table, where the dev_stripes is the right coefficient. Signed-off-by: David Sterba <dsterba@suse.com>
-rw-r--r--fs/btrfs/super.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 6e196b8a0820..2b44223e98a9 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1904,6 +1904,7 @@ static inline int btrfs_calc_avail_data_space(struct btrfs_fs_info *fs_info,
u64 min_stripe_size;
int min_stripes = 1, num_stripes = 1;
int i = 0, nr_devices;
+ const struct btrfs_raid_attr *rattr;
/*
* We aren't under the device list lock, so this is racy-ish, but good
@@ -1927,6 +1928,8 @@ static inline int btrfs_calc_avail_data_space(struct btrfs_fs_info *fs_info,
/* calc min stripe number for data space allocation */
type = btrfs_data_alloc_profile(fs_info);
+ rattr = &btrfs_raid_array[btrfs_bg_flags_to_raid_index(type)];
+
if (type & BTRFS_BLOCK_GROUP_RAID0) {
min_stripes = 2;
num_stripes = nr_devices;
@@ -1938,10 +1941,8 @@ static inline int btrfs_calc_avail_data_space(struct btrfs_fs_info *fs_info,
num_stripes = 4;
}
- if (type & BTRFS_BLOCK_GROUP_DUP)
- min_stripe_size = 2 * BTRFS_STRIPE_LEN;
- else
- min_stripe_size = BTRFS_STRIPE_LEN;
+ /* Adjust for more than 1 stripe per device */
+ min_stripe_size = rattr->dev_stripes * BTRFS_STRIPE_LEN;
rcu_read_lock();
list_for_each_entry_rcu(device, &fs_devices->devices, dev_list) {