Hi Johannes,
Can I have you this tested.. ? Thanks.
-------
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index e9676a4..1224b61 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -533,7 +533,7 @@ static noinline int device_list_add(const char *path,
* the btrfs dev scan cli, after FS has been mounted.
*/
if (fs_devices->opened) {
- return -EBUSY;
+ goto out;
} else {
/*
* That is if the FS is _not_ mounted and if you
@@ -566,6 +566,7 @@ static noinline int device_list_add(const char *path,
if (!fs_devices->opened)
device->generation = found_transid;
+out:
*fs_devices_ret = fs_devices;
return ret;
-------
Anand
On 09/14/2014 05:23 AM, Johannes Hirte wrote:
On Sat, 13 Sep 2014 19:55:25 +0200
Johannes Hirte <johannes.hi...@datenkhaos.de> wrote:
On Sat, 13 Sep 2014 13:36:37 +0800
Anand Jain <anand.j...@oracle.com> wrote:
Xavier, Johannes,
The quickest workaround for you will be to try to match
the device path as in the btrfs fi show -m </mnt> output to
your probably fstab/mnttab entry.
Doesn't work here. I don't even get a path with the affected kernels.
I'll get:
Label: none uuid: 02edbd6b-f044-4800-b21e-ca8982c2c2e5
Total devices 1 FS bytes used 270.10GiB
*** Some devices missing
Btrfs v3.16
with a working kernel:
Label: none uuid: 02edbd6b-f044-4800-b21e-ca8982c2c2e5
Total devices 1 FS bytes used 270.10GiB
devid 1 size 293.89GiB used 289.06GiB path /dev/sda1
Btrfs v3.16
Filesystem layout is:
subvolid 0 contains only the different subvolumes
ID 257 gen 414674 top level 5 path rootfs
ID 269 gen 414615 top level 5 path home-USER1
ID 317 gen 411498 top level 5 path home-USER2
ID 363 gen 410939 top level 5 path home-USER3
ID 382 gen 315844 top level 5 path home-USER4
ID 933 gen 410514 top level 5 path home-USER5
ID 995 gen 315756 top level 5 path homefs-USER6
subvol rootfs (ID 257) is set to the default subvolume, mounted at
start. Grub commandline is like following:
root=/dev/sda1 ro rootflags=subvol=rootfs,inode_cache,autodefrag
It doesn't matter, if the subvol parameter is set. I've tried with,
without and with subvolid=0 parameter. Everytime the same result.
And now I was able to reproduce on a second machine. The main
difference between the affected and the unaffected systems is
initramfs. On the affected systems, I don't use one. On the working
systems, the rootfs is mounted via initramfs before. I'll test, if an
initramfs will solve the issue. Seems likely, cause if I put the disk
of an affected system into a working system and mount it there,
everything works.
Of course, with the initramfs it works. Content of the init-script:
#!/bin/sh
mount -t devtmpfs devtmpfs /dev
mount -t proc proc /proc
mount -t sysfs sysfs /sys
mount -t tmpfs tmpfs /run
sleep 3 # wait for kernel msgs to quiet
echo "loading initrd"
btrfs dev scan
sleep 5
mount -o ro,subvol=rootfs,inode_cache,autodefrag /dev/sda1 /newroot
if [[ -x /newroot/sbin/init ]]; then
umount /sys /proc
exec switch_root /newroot /sbin/init
fi
#rescue shell
exec sh
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