Anand Jain
2014-Feb-04 04:23 UTC
[PATCH] btrfs-progs: there is devid 0 when replace is running
as of now when the replace-er disk is add to dev list
with its devid 0. We fail to obtain details of devid 0
since we don't query devid 0 at all as below.
---
btrfs rep start /dev/sdb /dev/sdf /btrfs
btrfs fi show
Label: none uuid: f8fb9819-16c8-47b7-b62f-0ff90f8c56cd
Total devices 3 FS bytes used 1.94GiB
devid 1 size 1.10GiB used 1.10GiB path /dev/sdb
devid 2 size 1.10GiB used 1.08GiB path /dev/sdc
devid 0 size 0.00 used 0.00 path
---
this patch will make it proper by querying dev id 0.
-----
btrfs repl start /dev/sdb /dev/sdf /btrfs
btrfs fi show /btrfs
Label: none uuid: f8fb9819-16c8-47b7-b62f-0ff90f8c56cd
Total devices 3 FS bytes used 1.94GiB
devid 0 size 1.10GiB used 1.10GiB path /dev/sdf
devid 1 size 1.10GiB used 1.10GiB path /dev/sdb
devid 2 size 1.10GiB used 1.08GiB path /dev/sdc
-----
Its fine to query dev id 0 when there is no replace
activity well because we just skip the error ENODEV
----
btrfs fi show /btrfs
Label: none uuid: f8fb9819-16c8-47b7-b62f-0ff90f8c56cd
Total devices 2 FS bytes used 1.94GiB
devid 1 size 1.10GiB used 1.10GiB path /dev/sdf
devid 2 size 1.10GiB used 1.08GiB path /dev/sdc
----
Signed-off-by: Anand Jain <anand.jain@oracle.com>
---
utils.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/utils.c b/utils.c
index de513b6..a045ffd 100644
--- a/utils.c
+++ b/utils.c
@@ -1696,7 +1696,7 @@ int get_fs_info(char *path, struct
btrfs_ioctl_fs_info_args *fi_args,
goto out;
}
- for (; i <= fi_args->max_id; ++i) {
+ for (i = 0; i <= fi_args->max_id; ++i) {
BUG_ON(ndevs >= fi_args->num_devices);
ret = get_device_info(fd, i, &di_args[ndevs]);
if (ret == -ENODEV)
--
1.7.1
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