user/sven/linux.git/include/linux/ceph/osd_client.h, branch v4.12

libceph: add an epoch_barrier field to struct ceph_osd_client

2017-05-04T07:19:21Z

Cephfs can get cap update requests that contain a new epoch barrier in them. When that happens we want to pause all OSD traffic until the right map epoch arrives. Add an epoch_barrier field to ceph_osd_client that is protected by the osdc->lock rwsem. When the barrier is set, and the current OSD map epoch is below that, pause the request target when submitting the request or when revisiting it. Add a way for upper layers (cephfs) to update the epoch_barrier as well. If we get a new map, compare the new epoch against the barrier before kicking requests and request another map if the map epoch is still lower than the one we want. If we get a map with a full pool, or at quota condition, then set the barrier to the current epoch value. Signed-off-by: Jeff Layton Reviewed-by: Ilya Dryomov Signed-off-by: Ilya Dryomov

libceph: allow requests to return immediately on full conditions if caller wishes

2017-05-04T07:19:21Z

Usually, when the osd map is flagged as full or the pool is at quota, write requests just hang. This is not what we want for cephfs, where it would be better to simply report -ENOSPC back to userland instead of stalling. If the caller knows that it will want an immediate error return instead of blocking on a full or at-quota error condition then allow it to set a flag to request that behavior. Set that flag in ceph_osdc_new_request (since ceph.ko is the only caller), and on any other write request from ceph.ko. A later patch will deal with requests that were submitted before the new map showing the full condition came in. Signed-off-by: Jeff Layton Reviewed-by: Ilya Dryomov Signed-off-by: Ilya Dryomov

libceph: remove req->r_replay_version

2017-05-04T07:19:20Z

Nothing uses this anymore with the removal of the ack vs. commit code. Remove the field and just encode zeroes into place in the request encoding. Signed-off-by: Jeff Layton Reviewed-by: Ilya Dryomov Signed-off-by: Ilya Dryomov

libceph: convert ceph_osd.o_ref from atomic_t to refcount_t

2017-05-04T07:19:19Z

refcount_t type and corresponding API should be used instead of atomic_t when the variable is used as a reference counter. This allows to avoid accidental refcounter overflows that might lead to use-after-free situations. Signed-off-by: Elena Reshetova Signed-off-by: Hans Liljestrand Signed-off-by: Kees Cook Signed-off-by: David Windsor Signed-off-by: Ilya Dryomov

libceph: osd_request_timeout option

2017-03-07T13:30:38Z

osd_request_timeout specifies how many seconds to wait for a response from OSDs before returning -ETIMEDOUT from an OSD request. 0 (default) means no limit. osd_request_timeout is osdkeepalive-precise -- in-flight requests are swept through every osdkeepalive seconds. With ack vs commit behaviour gone, abort_request() is really simple. This is based on a patch from Artur Molchanov . Tested-by: Artur Molchanov Signed-off-by: Ilya Dryomov Reviewed-by: Sage Weil

libceph: get rid of ack vs commit

2017-02-24T18:04:57Z

- CEPH_OSD_FLAG_ACK shouldn't be set anymore, so assert on it - remove support for handling ack replies (OSDs will send ack replies only if clients request them) - drop the "do lingering callbacks under osd->lock" logic from handle_reply() -- lreq->lock is sufficient in all three cases Signed-off-by: Ilya Dryomov Reviewed-by: Jeff Layton Reviewed-by: Sage Weil

libceph: always signal completion when done

2016-12-14T21:39:08Z

r_safe_completion is currently, and has always been, signaled only if on-disk ack was requested. It's there for fsync and syncfs, which wait for in-flight writes to flush - all data write requests set ONDISK. However, the pool perm check code introduced in 4.2 sends a write request with only ACK set. An unfortunately timed syncfs can then hang forever: r_safe_completion won't be signaled because only an unsafe reply was requested. We could patch ceph_osdc_sync() to skip !ONDISK write requests, but that is somewhat incomplete and yet another special case. Instead, rename this completion to r_done_completion and always signal it when the OSD client is done with the request, whether unsafe, safe, or error. This is a bit cleaner and helps with the cancellation code. Reported-by: Yan, Zheng Signed-off-by: Ilya Dryomov

libceph: initialize last_linger_id with a large integer

2016-11-10T19:13:08Z

osdc->last_linger_id is a counter for lreq->linger_id, which is used for watch cookies. Starting with a large integer should ease the task of telling apart kernel and userspace clients. Signed-off-by: Ilya Dryomov

libceph: add ceph_osdc_call() single-page helper

2016-08-24T21:49:15Z

Add a convenience function to osd_client to send Ceph OSD 'class' ops. The interface assumes that the request and reply data each consist of single pages. Signed-off-by: Douglas Fuller Signed-off-by: Ilya Dryomov Reviewed-by: Mike Christie Reviewed-by: Alex Elder

libceph: support for CEPH_OSD_OP_LIST_WATCHERS

2016-08-24T21:49:15Z

Add support for this Ceph OSD op, needed to support the RBD exclusive lock feature. Signed-off-by: Douglas Fuller [idryomov@gmail.com: refactor, misc fixes throughout] Signed-off-by: Ilya Dryomov Reviewed-by: Mike Christie Reviewed-by: Alex Elder