summaryrefslogtreecommitdiff
path: root/volumes.c
diff options
context:
space:
mode:
authorQu Wenruo <wqu@suse.com>2018-02-09 15:44:22 +0800
committerDavid Sterba <dsterba@suse.com>2018-02-24 01:37:17 +0100
commit12becfe1220bb4e45e529d4d2363394431605deb (patch)
tree15ed445d1ffaaa877a10f63b7eafea273188481a /volumes.c
parente9097ad59321f30e05bbc0cd1b41224b26125088 (diff)
btrfs-progs: Introduce btrfs_raid_array and related infrastructures
As part of the effort to unify code and behavior between btrfs-progs and kernel, copy the btrfs_raid_array from kernel to btrfs-progs. So later we can use the btrfs_raid_array[] to get needed raid info other than manually do if-else branches. Signed-off-by: Qu Wenruo <wqu@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'volumes.c')
-rw-r--r--volumes.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/volumes.c b/volumes.c
index 677d085..00acaa0 100644
--- a/volumes.c
+++ b/volumes.c
@@ -30,6 +30,72 @@
#include "utils.h"
#include "kernel-lib/raid56.h"
+const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES] = {
+ [BTRFS_RAID_RAID10] = {
+ .sub_stripes = 2,
+ .dev_stripes = 1,
+ .devs_max = 0, /* 0 == as many as possible */
+ .devs_min = 4,
+ .tolerated_failures = 1,
+ .devs_increment = 2,
+ .ncopies = 2,
+ },
+ [BTRFS_RAID_RAID1] = {
+ .sub_stripes = 1,
+ .dev_stripes = 1,
+ .devs_max = 2,
+ .devs_min = 2,
+ .tolerated_failures = 1,
+ .devs_increment = 2,
+ .ncopies = 2,
+ },
+ [BTRFS_RAID_DUP] = {
+ .sub_stripes = 1,
+ .dev_stripes = 2,
+ .devs_max = 1,
+ .devs_min = 1,
+ .tolerated_failures = 0,
+ .devs_increment = 1,
+ .ncopies = 2,
+ },
+ [BTRFS_RAID_RAID0] = {
+ .sub_stripes = 1,
+ .dev_stripes = 1,
+ .devs_max = 0,
+ .devs_min = 2,
+ .tolerated_failures = 0,
+ .devs_increment = 1,
+ .ncopies = 1,
+ },
+ [BTRFS_RAID_SINGLE] = {
+ .sub_stripes = 1,
+ .dev_stripes = 1,
+ .devs_max = 1,
+ .devs_min = 1,
+ .tolerated_failures = 0,
+ .devs_increment = 1,
+ .ncopies = 1,
+ },
+ [BTRFS_RAID_RAID5] = {
+ .sub_stripes = 1,
+ .dev_stripes = 1,
+ .devs_max = 0,
+ .devs_min = 2,
+ .tolerated_failures = 1,
+ .devs_increment = 1,
+ .ncopies = 2,
+ },
+ [BTRFS_RAID_RAID6] = {
+ .sub_stripes = 1,
+ .dev_stripes = 1,
+ .devs_max = 0,
+ .devs_min = 3,
+ .tolerated_failures = 2,
+ .devs_increment = 1,
+ .ncopies = 3,
+ },
+};
+
struct stripe {
struct btrfs_device *dev;
u64 physical;