Dan Mick [Tue, 8 Jan 2013 19:21:22 +0000 (11:21 -0800)]
librbd: Allow get_lock_info to fail
If the lock class isn't present, EOPNOTSUPP is returned for lock calls
on newer OSDs, but sadly EIO on older; we need to treat both as
acceptable failures for RBD images. rados lock list will still fail.
Fixes #3744.
Signed-off-by: Dan Mick <dan.mick@inktank.com> Reviewed-by: Sage Weil <sage@inktank.com>
Noah Watkins [Mon, 7 Jan 2013 23:04:33 +0000 (15:04 -0800)]
libcephfs: clarify interface return value
Document that ceph_get_stripe_unit_granularity may return an error code
(e.g. -ENOTCONN). The interface requires a mount, but currently we
return a compile-time constant. Other error codes may be possible in the
future.
Sage Weil [Sun, 6 Jan 2013 16:38:27 +0000 (08:38 -0800)]
msg/Pipe: prepare Message data for wire under pipe_lock
We cannot trust the Message bufferlists or other structures to be
stable without pipe_lock, as another Pipe may claim and modify the sent
list items while we are writing to the socket.
Sage Weil [Sun, 6 Jan 2013 16:33:01 +0000 (08:33 -0800)]
msgr: update Message envelope in encode, not write_message
Fill out the Message header, footer, and calculate CRCs during
encoding, not write_message(). This removes most modifications from
Pipe::write_message().
Sage Weil [Mon, 7 Jan 2013 20:58:39 +0000 (12:58 -0800)]
osdc/Objecter: fix linger_ops iterator invalidation on pool deletion
The call to check_linger_pool_dne() may unregister the linger request,
invalidating the iterator. To avoid this, increment the iterator at
the top of the loop.
Sage Weil [Sun, 6 Jan 2013 16:25:40 +0000 (08:25 -0800)]
msg/Pipe: encode message inside pipe_lock
This modifies bufferlists in the Message struct, and it is possible
for multiple instances of the Pipe to get references on the Message;
make sure they don't modify those bufferlists concurrently.
Sage Weil [Sat, 5 Jan 2013 18:39:08 +0000 (10:39 -0800)]
msg/Pipe: associate sending msgs to con inside lock
Associate a sending message with the connection inside the pipe_lock.
This way if a racing thread tries to steal these messages it will
be sure to reset the con point *after* we do such that it the con
pointer is valid in encode_payload() (and later).
Instead, special-case CALL in the helper--the only point in the code that
actually checks for the RD bit. (And fix one lingering user to use that
helper appropriately.)
Fixes: #3731 Signed-off-by: Sage Weil <sage@inktank.com> Reviewed-by: Dan Mick <dan.mick@inktank.com>
Samuel Just [Fri, 4 Jan 2013 20:43:52 +0000 (12:43 -0800)]
ReplicatedPG: remove old-head optization from push_to_replica
This optimization allowed the primary to push a clone as a single push in the
case that the head object on the replica is old and happens to be at the same
version as the clone. In general, using head in clone_subsets is tricky since
we might be writing to head during the push. calc_clone_subsets does not
consider head (probably for this reason). Handling the clone from head case
properly would require blocking writes on head in the interim which is probably
a bad trade off anyway.
Because the old-head optimization only comes into play if the replica's state
happens to fall on the last write to head prior to the snap that caused the
clone in question, it's not worth the complexity.
Fixes: #3698 Signed-off-by: Samuel Just <sam.just@inktank.com> Reviewed-by: Sage Weil <sage@inktank.com>
Sage Weil [Fri, 4 Jan 2013 01:15:07 +0000 (17:15 -0800)]
os/FileStore: fix non-btrfs op_seq commit order
The op_seq file is the starting point for journal replay. For stable btrfs
commit mode, which is using a snapshot as a reference, we should write this
file before we take the snap. We normally ignore current/ contents anyway.
On non-btrfs file systems, however, we should only write this file *after*
we do a full sync, and we should then fsync(2) it before we continue
(and potentially trim anything from the journal).
This fixes a serious bug that could cause data loss and corruption after
a power loss event. For a 'kill -9' or crash, however, there was little
risk, since the writes were still captured by the host's cache.
Fixes: #3721 Signed-off-by: Sage Weil <sage@inktank.com> Reviewed-by: Samuel Just <sam.just@inktank.com>
Samuel Just [Thu, 3 Jan 2013 17:59:45 +0000 (09:59 -0800)]
OSD: for old osds, dispatch peering messages immediately
Normally, we batch up peering messages until the end of
process_peering_events to allow us to combine many notifies, etc
to the same osd into the same message. However, old osds assume
that the actiavtion message (log or info) will be _dispatched
before the first sub_op_modify of the interval. Thus, for those
peers, we need to send the peering messages before we drop the
pg lock, lest we issue a client repop from another thread before
activation message is sent.
Signed-off-by: Samuel Just <sam.just@inktank.com> Reviewed-by: Sage Weil <sage@inktank.com>
Sage Weil [Thu, 3 Jan 2013 06:20:06 +0000 (22:20 -0800)]
osd: let pgs process map advances before booting
The OSD deliberate consumes and processes most OSDMaps from while it
was down before it marks itself up, as this is can be slow. The new
threading code does this asynchronously in peering_wq, though, and
does not let it drain before booting the OSD. The OSD can get into
a situation where it marks itself up but is not responsive or useful
because of the backlog, and only makes the situation works by
generating more osdmaps as result.
Fix this by calling activate_map() even when booting, and when booting
draining the peering_wq on each call. This is harmless since we are
not yet processing actual ops; we only need to be async when active.
Fixes: #3714 Signed-off-by: Sage Weil <sage@inktank.com>
Sam Lang [Wed, 2 Jan 2013 22:07:13 +0000 (16:07 -0600)]
fuse: Fix cleanup code path on init failure
With the changes from 856f32ab, the cfuse.init call returns
a _positive_ errno, which was getting ignored. Also, if an
error occurs during cfuse.init(), we need to teardown the client
mount.
Josh Durgin [Wed, 2 Jan 2013 22:15:24 +0000 (14:15 -0800)]
librbd: establish watch before reading header
This eliminates a window in which a race could occur when we have an
image open but no watch established. The previous fix (using
assert_version) did not work well with resend operations.
Josh Durgin [Wed, 2 Jan 2013 20:32:33 +0000 (12:32 -0800)]
Revert "librbd: ensure header is up to date after initial read"
Using assert version for linger ops doesn't work with retries,
since the version will change after the first send.
This reverts commit e1776809031c6dad441cfb2b9fac9612720b9083.
Sage Weil [Mon, 31 Dec 2012 23:22:23 +0000 (15:22 -0800)]
libcephfs: choose more unique nonce
We were using a per-process counter combined with the pid. A short
running process can easily loop through and reuse the same pid later.
Instead, go for 48 bits of randomness and the pid. This way if we get
a dup pid we'll only get a dup nonce once out of 2^48 tries.
Avoids #3630 when running a libcephfs test in a loop (so that the pid
is eventually reused). This is a better fix than the broken 8b599083705c2495810c00f9f5fd5bb8ace7f32e. The real solution on the MDS
side involves cleaning up the msgr/MDS interaction with session
shutdown.
Sage Weil [Mon, 31 Dec 2012 23:23:29 +0000 (15:23 -0800)]
client: fix _create
make_request() clear out req->reply and frees req; we can't inspect
it here.
Instead, just assume that extra_bl is the create flag/ino if it is
present. Old code does not include an extra_bl on CREATE, and new code
will have the same first bytes for compatibility.
Josh Durgin [Sun, 30 Dec 2012 04:35:15 +0000 (20:35 -0800)]
librbd: fix race between unprotect and clone
Clone needs to actually re-read the header to make sure the image is
still protected before returning. Additionally, it needs to consider
the image protected *only* if the protection status is protected -
unprotecting does not count. I thought I'd already fixed this, but
can't find the commit.
Josh Durgin [Sat, 29 Dec 2012 00:54:51 +0000 (16:54 -0800)]
librbd: add {rbd_}open_read_only()
Since 58890cfad5f7bee933baa599a68e6c65993379d4, regular {rbd_}open()
would fail with -EPERM if the user did not have write access to the
pool, since a watch on the header was requested.
For many uses of read-only access, establishing a watch is not
necessary, since changes to the header do not matter. For example,
getting metadata about an image via 'rbd info' does not care if a new
snapshot is created while it is in progress.
Josh Durgin [Sat, 29 Dec 2012 03:47:09 +0000 (19:47 -0800)]
OSD: remove RD flag from CALL ops
20496b8d2b2c3779a771695c6f778abbdb66d92a forgot to do this. Without
this change, all class methods required regular read permission in
addition to class-read or class-write.
Josh Durgin [Sat, 29 Dec 2012 03:44:36 +0000 (19:44 -0800)]
cls_rbd: get_children does not need write permission
This prevented a read-only user from being able to unprotect a
snapshot without write permission on all pools. This was masked before
by the CLS_METHOD_PUBLIC flag.
Sage Weil [Sat, 29 Dec 2012 01:20:43 +0000 (17:20 -0800)]
msg/Pipe: use state_closed atomic_t for _lookup_pipe
We shouldn't look at Pipe::state in SimpleMessenger::_lookup_pipe() without
holding pipe_lock. Instead, use an atomic that we set to non-zero only
when transitioning to the terminal STATE_CLOSED state.
Sage Weil [Sun, 23 Dec 2012 17:22:18 +0000 (09:22 -0800)]
msgr: fix race on Pipe removal from hash
When a pipe is faulting and shutting down, we have to drop pipe_lock to
take msgr lock and then remove the entry. The Pipe in this case will
have STATE_CLOSED. Handle this case in all places we do a lookup on
the rank_pipe hash so that we effectively ignore entries that are
CLOSED.
This fixes a race introduced by the previous commit where we won't use
the CLOSED pipe and try to register a new one, but the old one is still
registered.
Sage Weil [Sun, 23 Dec 2012 17:19:05 +0000 (09:19 -0800)]
msgr: don't queue message on closed pipe
If we have a con that refs a pipe but it is closed, don't use it. If
the ref is still there, it is only because we are racing with fault()
and it is about to (or just was) be detached. Either way,
projects / ceph.git / log