talos-op-linux/include/linux/ceph, branch v3.6

libceph: clean up con flags

2012-07-31T01:16:01+00:00

Rename flags with CON_FLAG prefix, move the definitions into the c file, and (better) document their meaning. Signed-off-by: Sage Weil

libceph: replace connection state bits with states

2012-07-31T01:16:00+00:00

Use a simple set of 6 enumerated values for the socket states (CON_STATE_*) and use those instead of the state bits. All of the con->state checks are now under the protection of the con mutex, so this is safe. It also simplifies many of the state checks because we can check for anything other than the expected state instead of various bits for races we can think of. This appears to hold up well to stress testing both with and without socket failure injection on the server side. Signed-off-by: Sage Weil

ceph: define snap counts as u32 everywhere

2012-07-31T01:15:47+00:00

There are two structures in which a count of snapshots are maintained: struct ceph_snap_context { ... u32 num_snaps; ... } and struct ceph_snap_realm { ... u32 num_prior_parent_snaps; /* had prior to parent_since */ ... u32 num_snaps; ... } These fields never take on negative values (e.g., to hold special meaning), and so are really inherently unsigned. Furthermore they take their value from over-the-wire or on-disk formatted 32-bit values. So change their definition to have type u32, and change some spots elsewhere in the code to account for this change. Signed-off-by: Alex Elder Reviewed-by: Josh Durgin

libceph: support crush tunables

2012-07-31T01:15:23+00:00

The server side recently added support for tuning some magic crush variables. Decode these variables if they are present, or use the default values if they are not present. Corresponds to ceph.git commit 89af369c25f274fe62ef730e5e8aad0c54f1e5a5. Signed-off-by: caleb miles Reviewed-by: Sage Weil Reviewed-by: Alex Elder Reviewed-by: Yehuda Sadeh

libceph: move feature bits to separate header

2012-07-30T23:23:22+00:00

This is simply cleanup that will keep things more closely synced with the userland code. Signed-off-by: Sage Weil Reviewed-by: Alex Elder Reviewed-by: Yehuda Sadeh

libceph: define ceph_extract_encoded_string()

2012-07-30T16:29:57+00:00

This adds a new utility routine which will return a dynamically- allocated buffer containing a string that has been decoded from ceph over-the-wire format. It also returns the length of the string if the address of a size variable is supplied to receive it. Signed-off-by: Alex Elder Reviewed-by: Sage Weil

libceph: fix off-by-one bug in ceph_encode_filepath()

2012-07-30T16:29:55+00:00

There is a BUG_ON() call that doesn't account for the single byte structure version at the start of an encoded filepath in ceph_encode_filepath(). Fix that. Signed-off-by: Alex Elder Reviewed-by: Yehuda Sadeh Reviewed-by: Josh Durgin

libceph: prevent the race of incoming work during teardown

2012-07-30T16:29:53+00:00

Add an atomic variable 'stopping' as flag in struct ceph_messenger, set this flag to 1 in function ceph_destroy_client(), and add the condition code in function ceph_data_ready() to test the flag value, if true(1), just return. Signed-off-by: Guanjun He Reviewed-by: Sage Weil

libceph: fix messenger retry

2012-07-30T16:29:52+00:00

In ancient times, the messenger could both initiate and accept connections. An artifact if that was data structures to store/process an incoming ceph_msg_connect request and send an outgoing ceph_msg_connect_reply. Sadly, the negotiation code was referencing those structures and ignoring important information (like the peer's connect_seq) from the correct ones. Among other things, this fixes tight reconnect loops where the server sends RETRY_SESSION and we (the client) retries with the same connect_seq as last time. This bug pretty easily triggered by injecting socket failures on the MDS and running some fs workload like workunits/direct_io/test_sync_io. Signed-off-by: Sage Weil

libceph: initialize msgpool message types

2012-07-30T16:29:50+00:00

Initialize the type field for messages in a msgpool. The caller was doing this for osd ops, but not for the reply messages. Reported-by: Alex Elder Signed-off-by: Sage Weil