Adds an ability to change the read_mirror_policy at remount.
Signed-off-by: Anand Jain <anand.jain@xxxxxxxxxx>
---
fs/btrfs/super.c | 19 ++++++++++++++++---
1 file changed, 16 insertions(+), 3 deletions(-)
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 7ddecf4178a6..e70592036b95 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -856,6 +856,12 @@ int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
intarg = 0;
if (match_int(&args[0], &intarg) == 0) {
struct btrfs_device *device;
+ int clear = 0;
+
+ if (intarg < 0) {
+ clear = 1;
+ intarg = -intarg;
+ }
device = btrfs_find_device(info, intarg,
NULL, NULL);
@@ -866,10 +872,17 @@ int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
ret = -EINVAL;
goto out;
}
- info->read_mirror_policy =
+
+ if (clear) {
+ info->read_mirror_policy = 0;
+ clear_bit(BTRFS_DEV_STATE_READ_MIRROR,
+ &device->dev_state);
+ } else {
+ info->read_mirror_policy =
BTRFS_READ_MIRROR_BY_DEV;
- set_bit(BTRFS_DEV_STATE_READ_MIRROR,
- &device->dev_state);
+ set_bit(BTRFS_DEV_STATE_READ_MIRROR,
+ &device->dev_state);
+ }
break;
}
--
2.7.0
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