提交 de483734 编写于 作者: A Anand Jain 提交者: David Sterba

btrfs: use need_full_stripe() in __btrfs_map_block()

A cleanup patch, use need_full_stripe() to replace the open code.
Signed-off-by: NAnand Jain <anand.jain@oracle.com>
Reviewed-by: NQu Wenruo <quwenruo.btrfs@gmx.com>
Reviewed-by: NNikolay Borisov <nborisov@suse.com>
Signed-off-by: NDavid Sterba <dsterba@suse.com>
上级 79f015f2
......@@ -5691,10 +5691,10 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info,
if (map->type & BTRFS_BLOCK_GROUP_RAID0) {
stripe_nr = div_u64_rem(stripe_nr, map->num_stripes,
&stripe_index);
if (op != BTRFS_MAP_WRITE && op != BTRFS_MAP_GET_READ_MIRRORS)
if (!need_full_stripe(op))
mirror_num = 1;
} else if (map->type & BTRFS_BLOCK_GROUP_RAID1) {
if (op == BTRFS_MAP_WRITE || op == BTRFS_MAP_GET_READ_MIRRORS)
if (need_full_stripe(op))
num_stripes = map->num_stripes;
else if (mirror_num)
stripe_index = mirror_num - 1;
......@@ -5707,7 +5707,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info,
}
} else if (map->type & BTRFS_BLOCK_GROUP_DUP) {
if (op == BTRFS_MAP_WRITE || op == BTRFS_MAP_GET_READ_MIRRORS) {
if (need_full_stripe(op)) {
num_stripes = map->num_stripes;
} else if (mirror_num) {
stripe_index = mirror_num - 1;
......@@ -5721,7 +5721,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info,
stripe_nr = div_u64_rem(stripe_nr, factor, &stripe_index);
stripe_index *= map->sub_stripes;
if (op == BTRFS_MAP_WRITE || op == BTRFS_MAP_GET_READ_MIRRORS)
if (need_full_stripe(op))
num_stripes = map->sub_stripes;
else if (mirror_num)
stripe_index += mirror_num - 1;
......@@ -5736,9 +5736,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info,
}
} else if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) {
if (need_raid_map &&
(op == BTRFS_MAP_WRITE || op == BTRFS_MAP_GET_READ_MIRRORS ||
mirror_num > 1)) {
if (need_raid_map && (need_full_stripe(op) || mirror_num > 1)) {
/* push stripe_nr back to the start of the full stripe */
stripe_nr = div64_u64(raid56_full_stripe_start,
stripe_len * nr_data_stripes(map));
......@@ -5765,9 +5763,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info,
/* We distribute the parity blocks across stripes */
div_u64_rem(stripe_nr + stripe_index, map->num_stripes,
&stripe_index);
if ((op != BTRFS_MAP_WRITE &&
op != BTRFS_MAP_GET_READ_MIRRORS) &&
mirror_num <= 1)
if (!need_full_stripe(op) && mirror_num <= 1)
mirror_num = 1;
}
} else {
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册