fsid can be mounted multiple times, with different subvolid.
And we don't have to scan a mount point if we already have
that in the scanned list.
And thus nicely avoids the following warning with multiple
subvol mounts on older kernel like 2.6.32 where
BTRFS_IOC_GET_FSLABEL ioctl does not exist.
./btrfs fi show -m
Label: none uuid: 31845933-611e-422d-ae6f-386e57ad81aa
Total devices 2 FS bytes used 172.00KiB
devid 1 size 3.00GiB used 642.38MiB path /dev/sdd
devid 2 size 3.00GiB used 622.38MiB path /dev/sde
warning, device 2 is missing
warning devid 2 not found already
warning, device 2 is missing
warning devid 2 not found already
Signed-off-by: Anand Jain <[email protected]>
---
cmds-filesystem.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/cmds-filesystem.c b/cmds-filesystem.c
index 793df0e..e2049cc 100644
--- a/cmds-filesystem.c
+++ b/cmds-filesystem.c
@@ -468,6 +468,10 @@ static int btrfs_scan_kernel(void *search, unsigned
unit_mode)
goto out;
}
+ /* skip all fs already shown as mounted fs */
+ if (is_seen_fsid(fs_info_arg.fsid))
+ continue;
+
ret = get_label_mounted(mnt->mnt_dir, label);
/* provide backward kernel compatibility */
if (ret == -ENOTTY)
--
2.4.1
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