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authorMiao Xie <miaox@cn.fujitsu.com>2013-01-17 05:38:51 +0000
committerJosef Bacik <jbacik@fusionio.com>2013-02-20 09:37:19 -0500
commite6ec716f0ddbe51741ef261d0804f0c28038dda4 (patch)
tree3339ba3503a5bac32c5cf7835a153f73d5eecd06 /fs/btrfs/extent-tree.c
parenta1897fddd28daf6b23d05a30dc2a18836f77f8e3 (diff)
downloadop-kernel-dev-e6ec716f0ddbe51741ef261d0804f0c28038dda4.zip
op-kernel-dev-e6ec716f0ddbe51741ef261d0804f0c28038dda4.tar.gz
Btrfs: make raid attr array more readable
The current code of raid attr arry is hard to understand and it is easy to introduce some problem if we modify the array. So I changed it and made it more readable. Cc: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Diffstat (limited to 'fs/btrfs/extent-tree.c')
-rw-r--r--fs/btrfs/extent-tree.c22
1 files changed, 9 insertions, 13 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 82400b2..174c4d5 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -5545,20 +5545,16 @@ wait_block_group_cache_done(struct btrfs_block_group_cache *cache)
int __get_raid_index(u64 flags)
{
- int index;
-
if (flags & BTRFS_BLOCK_GROUP_RAID10)
- index = 0;
+ return BTRFS_RAID_RAID10;
else if (flags & BTRFS_BLOCK_GROUP_RAID1)
- index = 1;
+ return BTRFS_RAID_RAID1;
else if (flags & BTRFS_BLOCK_GROUP_DUP)
- index = 2;
+ return BTRFS_RAID_DUP;
else if (flags & BTRFS_BLOCK_GROUP_RAID0)
- index = 3;
+ return BTRFS_RAID_RAID0;
else
- index = 4;
-
- return index;
+ return BTRFS_RAID_SINGLE;
}
static int get_block_group_index(struct btrfs_block_group_cache *cache)
@@ -7518,16 +7514,16 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr)
index = get_block_group_index(block_group);
}
- if (index == 0) {
+ if (index == BTRFS_RAID_RAID10) {
dev_min = 4;
/* Divide by 2 */
min_free >>= 1;
- } else if (index == 1) {
+ } else if (index == BTRFS_RAID_RAID1) {
dev_min = 2;
- } else if (index == 2) {
+ } else if (index == BTRFS_RAID_DUP) {
/* Multiply by 2 */
min_free <<= 1;
- } else if (index == 3) {
+ } else if (index == BTRFS_RAID_RAID0) {
dev_min = fs_devices->rw_devices;
do_div(min_free, dev_min);
}
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