Commit Graph

7 Commits

Author SHA1 Message Date
Sage Weil 0deb01c999 ceph: track laggy state of mds from mdsmap
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:40 -07:00
Sage Weil 9ec7cab14e ceph: hex dump corrupt server data to KERN_DEBUG
Also, print fsid using standard format, NOT hex dump.

Signed-off-by: Sage Weil <sage@newdream.net>
2009-12-21 16:39:52 -08:00
Sage Weil 94045e115e ceph: decode updated mdsmap format
The mds map now uses the global_id as the 'key' (instead of the addr,
which was a poor choice).

This is protocol change.

Signed-off-by: Sage Weil <sage@newdream.net>
2009-11-20 14:24:33 -08:00
Sage Weil 63f2d21195 ceph: use fixed endian encoding for ceph_entity_addr
We exchange struct ceph_entity_addr over the wire and store it on disk.
The sockaddr_storage.ss_family field, however, is host endianness.  So,
fix ss_family endianness to big endian when sending/receiving over the
wire.

Signed-off-by: Sage Weil <sage@newdream.net>
2009-11-03 15:17:56 -08:00
Sage Weil c89136ea42 ceph: convert encode/decode macros to inlines
This avoids the fugly pass by reference and makes the code a bit easier
to read.

Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-14 09:59:09 -07:00
Sage Weil e251e28808 ceph: fix mdsmap decoding when multiple mds's are present
A misplaced sizeof() around namelen was throwing things off.

Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-07 16:38:55 -07:00
Sage Weil 2f2dc05340 ceph: MDS client
The MDS (metadata server) client is responsible for submitting
requests to the MDS cluster and parsing the response.  We decide which
MDS to submit each request to based on cached information about the
current partition of the directory hierarchy across the cluster.  A
stateful session is opened with each MDS before we submit requests to
it, and a mutex is used to control the ordering of messages within
each session.

An MDS request may generate two responses.  The first indicates the
operation was a success and returns any result.  A second reply is
sent when the operation commits to disk.  Note that locking on the MDS
ensures that the results of updates are visible only to the updating
client before the operation commits.  Requests are linked to the
containing directory so that an fsync will wait for them to commit.

If an MDS fails and/or recovers, we resubmit requests as needed.  We
also reconnect existing capabilities to a recovering MDS to
reestablish that shared session state.  Old dentry leases are
invalidated.

Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 11:31:09 -07:00