atomic_t: add atomic64_t

Signed-off-by: Yehuda Sadeh <yehuda@inktank.com>
common/perf_counters: use atomics instead of a mutex

The mutex is way too expensive.

Signed-off-by: Sage Weil <sage@inktank.com>
mon: remember osd weight when auto-marking osds out

If we automatically mark an OSD out, remember its OSD weight.

Signed-off-by: Sage Weil <sage@inktank.com>
mon: restore previous weight when auto-marked out osd boots

When an OSD that was marked out boots, restore the weight it had before.

Signed-off-by: Sage Weil <sage@inktank.com>
ReplicatedPG::start_flush: send delete even if there are no snaps

Even if all snaps for the clone have been removed, we still have to
send the delete to ensure that when the object is recreated the
new snaps aren't included in the wrong clone.

Signed-off-by: Samuel Just <sam.just@inktank.com>
common/perf_counters: use second atomic to make counters safe to read

Add a second counter so that we can detect a race with an add/inc during
read, and retry.

Signed-off-by: Sage Weil <sage@inktank.com>
osd: include osd_objectstore in metadata reported to mon

Provide visibility into the OSD backend.

Signed-off-by: Sage Weil <sage@inktank.com>
Add header cache to DBObjectMap

OMap is used by PG to store PGLog, so it's called by each write operations.
Because leveldb don't play well in random read and "header_lock" limit the
concurrence. Add a LRU cache to avoid too much overload on seeking header.

Signed-off-by: Haomai Wang <haomaiwang@gmail.com>
mds: journal EImportFinish after adjusting subtree auth

Submitting EImportFinish may journal an extra ESubtreeMap as side
effect. The ESubtreeMap should reflects subtree state after import
is finished.

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
mds: include all of directory inode's replicas in rmdir witnesses

If a MDS crashed after journaling a rmdir operation, but before sending
MDentryUnlink messages. Survivor MDS may have incorrect linkage for the
removed directory. Later when the MDS recovers, the incorrect linkage
can cause survivor MDS crash.

The fix is include all of directory inode's replicas in rmdir witnesses
list. When receiving a rmdir slave request, MDS who has no auth subtree
in the directory only need to update its cache and send reply (doesn't
need to journal the slave request).

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
mds: skip journaling slave rename when possible

Rename operation can affect three dentries and two inodes. For MDS
who receives rename slave request, but isn't authority of any of
these dentries/inodes and doesn't have any auth subtree under these
dentries/inodes, journaling slave rename can be skipped.

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
mds: allow early reply when there is no journaled slave update

Early reply should be Ok when there were slave requests, but none
of them modifies any object.

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
mds: journal rename source inode when rollback rename

rename changes the source inode's ctime. rollback changes ctime back
to its original value.

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
mds: try trimming exported objects

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
mds: drop locks after removing import/export state

dropping locks can dispatch requests, which may export the same
dirfrag again.

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
mds: fix remote auth pin race

When removing auth unpinned objects from mdr->remote_auth_pins,
Server::handle_slave_auth_pin() checks object's authority to decide
if the object was auth pinned by a given MDS. This method isn't
reliable because when object isn't auth pinned, its authority may
change.

The fix is remember from which MDS an objects was auth pinned.

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
mds: queue waiters in MDCache::force_dir_fragment()

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
mds: Add LogEvent::get_type_str()

Signed-off-by: John Spray <john.spray@inktank.com>
common: Add write_stream(ostream) to bufferlist

Enable C++ style file I/O when writing binary output
from bufferlists.

Signed-off-by: John Spray <john.spray@inktank.com>
objecter: Don't warn on multiple admin sockets

Suppress messages about failure to register admin sockets
if they are EEXIST, because this is a case that can occur
naturally if multiple objecter/librados clients are instantiated
within the same process.

Signed-off-by: John Spray <john.spray@inktank.com>