Hi guys,
I have got a patch migrating from 3.11 version, and it works for
3.19.25/26.
It could be a regression. The patch looks like:
--- ufs/super.c 2015-09-26 17:18:46.000000000 +0800
+++ work/super.c 2015-10-12 23:46:40.964962685 +0800
@@ -805,6 +805,7 @@
UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
mutex_init(&sbi->mutex);
+ mutex_init(&sbi->s_lock);
spin_lock_init(&sbi->work_lock);
INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
/*
Pls help review this patch.
Meanwhile, source tar downloaded by 3.19.0-26 quite matches what I get
from kernel, though they both look like 3.19.8.
root@compiler-14:~# diff linux-3.19.8/Makefile
~/ufs_rw/linux-lts-vivid-3.19.0/Makefile
4,5c4,5
< EXTRAVERSION =
< NAME = Diseased Newt
---
> EXTRAVERSION = -ckt5
> NAME = Sedated Swine
/// ...
At least the header is different, which is related to this patch.
root@compiler-14:~# diff linux-3.19.8/fs/ufs/ufs.h
~/ufs_rw/linux-lts-vivid-3.19.0/fs/ufs/
32a33
> struct mutex s_lock;
Regards
** Patch added: "patch to enable ufs rw for 3.19.25/26"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1501623/+attachment/4493043/+files/ufs_rw.patch
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https://bugs.launchpad.net/bugs/1501623
Title:
UFS rw support fails with 3.19.0-26-generic
Status in linux package in Ubuntu:
Incomplete
Status in linux source package in Vivid:
Incomplete
Bug description:
Hi guys,
I'd like to enable rw support for ufs file system with kernel
3.19.0-26-generic.
Basically, I follow steps as below from
http://oz123.github.io/writings/2012-11-26-enable-ufs-write-support-
debian/
sudo apt-get build-dep --no-install-recommends linux-image-$(uname -r)
mkdir ufs_rw
cd ufs_rw
apt-get source linux-image-$(uname -r)
cp -v /usr/src/linux-headers-$(uname -r)/Module.symvers .
cd linux-*/
cp -v /boot/config-$(uname -r) .
make EXTRAVERSION=-4 O=~/ufs_rw oldconfig
sed -i 's/# CONFIG_UFS_FS_WRITE is not set/CONFIG_UFS_FS_WRITE=y/'
~/ufs_rw/.config
make EXTRAVERSION=-4 O=~/ufs_rw prepare
make EXTRAVERSION=-4 O=~/ufs_rw outputmakefile
make EXTRAVERSION=-4 O=~/ufs_rw archprepare
make EXTRAVERSION=-4 O=~/ufs_rw modules SUBDIRS=scripts
make EXTRAVERSION=-4 O=~/ufs_rw modules SUBDIRS=fs/ufs
I get ufs.ko under ufs_rw/fs/ufs and try it with below commands.
modprobe nbd
qemu-nbd -c /dev/nbd0 freebsd10u1x64
mount -t ufs -o ufstype=ufs2,rw /dev/nbd0p2 /mnt
There is no error or warning when I run
mount -t ufs -o ufstype=ufs2,rw /dev/nbd0p2 /mnt
However, when I try to write something to /mnt or even umount /mnt,
there is kernel panic.
And further more, the way above works for
3.8.0-34-generic/3.11.0-26-generic.
That means I can read/write correctly with ufs2 file system.
It breaks with 3.19.0-26-generic, from my view.
Please let me know if more info is needed.
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