mkcephfs regression in current master branch

["Jim Schutt" <jaschut@sandia.gov>]

Hi,

In my testing I make repeated use of the "manual" mkcephfs
sequence described in the man page:

    master# mkdir /tmp/foo
    master# mkcephfs -c /etc/ceph/ceph.conf --prepare-monmap -d /tmp/foo
    osdnode# mkcephfs --init-local-daemons osd -d /tmp/foo
    mdsnode# mkcephfs --init-local-daemons mds -d /tmp/foo
    master# mkcephfs --prepare-mon -d /tmp/foo
    monnode# mkcephfs --init-local-daemons mon -d /tmp/foo

Using current master branch (commit ca79f45a33f9), the
"mkcephfs --init-local-daemons osd" phase breaks like this:

2012-05-24 13:24:06.325905 7fdcd61d4780 -1 filestore(/ram/mnt/ceph/data.osd.0) could not find 23c2fcde/osd_superblock/0 in index: (2) No such file or directory
2012-05-24 13:24:06.326768 7fdcd1ee2700 -1 filestore(/ram/mnt/ceph/data.osd.0) async snap create 'snap_1' transid 0 got (17) File exists
os/FileStore.cc: In function 'void FileStore::sync_entry()' thread 7fdcd1ee2700 time 2012-05-24 13:24:06.326792
os/FileStore.cc: 3564: FAILED assert(0 == "async snap ioctl error")
  ceph version 0.47.1-157-gb003815 (commit:b003815c222add8bdcf645d9ba4ef7e13f34587e)
  1: (FileStore::sync_entry()+0x34f0) [0x68e190]
  2: (FileStore::SyncThread::entry()+0xd) [0x6a2abd]
  3: (Thread::_entry_func(void*)+0x1b9) [0x803499]
  4: (()+0x77f1) [0x7fdcd58637f1]
  5: (clone()+0x6d) [0x7fdcd4cb4ccd]
  NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this.
2012-05-24 13:24:06.327991 7fdcd1ee2700 -1 os/FileStore.cc: In function 'void FileStore::sync_entry()' thread 7fdcd1ee2700 time 2012-05-24 13:24:06.326792
os/FileStore.cc: 3564: FAILED assert(0 == "async snap ioctl error")

FWIW, with commit 598dea12411 (filestore: mkfs: only
create snap_0 if we created current_op_seq) reverted,
I am able to create a new filesystem using the above
sequence, and a typical "mkcephfs --init-local-daemons osd"
looks like this:

2012-05-24 13:06:25.918663 7fe7ac829780 -1 filestore(/ram/mnt/ceph/data.osd.0) could not find 23c2fcde/osd_superblock/0 in index: (2) No such file or directory
2012-05-24 13:06:26.301738 7fe7ac829780 -1 created object store /ram/mnt/ceph/data.osd.0 journal /dev/mapper/cs32s01p2 for osd.0 fsid f8cc9fa2-a300-45a1-ae6d-e0c0ef418d0f
creating private key for osd.0 keyring /mnt/ceph/misc.osd.0/keyring.osd.0
creating /mnt/ceph/misc.osd.0/keyring.osd.0

Thanks -- Jim