ZFS on Linux status

Hi everyone,

A lot of time has passed since my last post - sorry about that. I simply hadn't made any visible progress. My free time has been less than I expected and the needed time for this part of the project is a bit more than I originally thought it would be ;)

Anyway... on to the news.

zfs_ioctl.c and libzpool-kernel are finally compiling, linking and partially working.

It's not possible to mount ZFS filesystems yet, however a few commands already work:

$ uname -a
Linux wizy 2.6.15-26-amd64-generic #1 SMP PREEMPT Thu Aug 3 02:52:35 UTC 2006 x86_64 GNU/Linux

$ ~/zfs/trunk/zfs-fuse/zfs-fuse &

$ ./zpool status
no pools available

$ dd if=/dev/zero of=/tmp/test1 bs=1M count=100
$ dd if=/dev/zero of=/tmp/test2 bs=1M count=100
$ dd if=/dev/zero of=/tmp/test3 bs=1M count=100

$ ./zpool create pool raidz /tmp/test1 /tmp/test2 /tmp/test3
cannot mount '/pool': failed to create mountpoint

$ ./zpool list
NAME                    SIZE    USED   AVAIL    CAP  HEALTH     ALTROOT
pool                    286M     87K    286M     0%  ONLINE     -

$ ./zpool scrub pool

$ ./zpool status
  pool: pool
 state: ONLINE
 scrub: scrub completed with 0 errors on Sat Aug 19 03:45:45 2006
config:

        NAME            STATE     READ WRITE CKSUM
        pool            ONLINE       0     0     0
          raidz1        ONLINE       0     0     0
            /tmp/test1  ONLINE       0     0     0
            /tmp/test2  ONLINE       0     0     0
            /tmp/test3  ONLINE       0     0     0

errors: No known data errors

$ dd if=/dev/urandom of=/tmp/test2 bs=1M count=30

$ ./zpool scrub

$ ./zpool status
  pool: pool
 state: DEGRADED
status: One or more devices could not be used because the label is missing or
        invalid.  Sufficient replicas exist for the pool to continue
        functioning in a degraded state.
action: Replace the device using 'zpool replace'.
   see: http://www.sun.com/msg/ZFS-8000-4J
 scrub: scrub completed with 0 errors on Sat Aug 19 03:47:37 2006
config:

        NAME            STATE     READ WRITE CKSUM
        pool            DEGRADED     0     0     0
          raidz1        DEGRADED     0     0     0
            /tmp/test1  ONLINE       0     0     0
            /tmp/test2  UNAVAIL      0     0     0  corrupted data
            /tmp/test3  ONLINE       0     0     0

errors: No known data errors

$ ./zfs list
NAME                   USED  AVAIL  REFER  MOUNTPOINT
pool                  60.6K   158M  2.00K  /pool

$ ./zfs create pool/test
cannot mount '/pool/test': failed to create mountpoint
filesystem successfully created, but not mounted

$ ./zfs list
NAME                   USED  AVAIL  REFER  MOUNTPOINT
pool                  66.6K   158M  2.00K  /pool
pool/test             2.00K   158M  2.00K  /pool/test

There is still a major glitch in the zfs_ioctl <-> zpool/zfs communication, so I haven't uploaded the latest code to the SVN repository just yet, but I definitely expect to fix it tomorrow.

There's also an interesting bit of code that I implemented in order to help me debug zfs-on-fuse (also still not uploaded to SVN) that I'll talk about in my next post ;)

Stay tuned.