BMC/Intel-BMC/linux.git/include/linux/ceph/ceph_fs.h, branch dev-4.7

ceph: using hash value to compose dentry offset

2016-05-25T23:15:36+00:00

If MDS sorts dentries in dirfrag in hash order, we use hash value to compose dentry offset. dentry offset is: (0xff << 52) | ((24 bits hash) << 28) | (the nth entry hash hash collision) This offset is stable across directory fragmentation. This alos means there is no need to reset readdir offset if directory get fragmented in the middle of readdir. Signed-off-by: Yan, Zheng

ceph: define 'end/complete' in readdir reply as bit flags

2016-05-25T23:15:35+00:00

Set a flag in readdir request, which indicates that client interprets 'end/complete' as bit flags. So that mds can reply additional flags in readdir reply. Signed-off-by: Yan, Zheng

libceph: support for subscribing to "mdsmap." maps

2016-05-25T23:15:30+00:00

Signed-off-by: Ilya Dryomov

libceph, rbd: ceph_osd_linger_request, watch/notify v2

2016-05-25T23:15:02+00:00

This adds support and switches rbd to a new, more reliable version of watch/notify protocol. As with the OSD client update, this is mostly about getting the right structures linked into the right places so that reconnects are properly sent when needed. watch/notify v2 also requires sending regular pings to the OSDs - send_linger_ping(). A major change from the old watch/notify implementation is the introduction of ceph_osd_linger_request - linger requests no longer piggy back on ceph_osd_request. ceph_osd_event has been merged into ceph_osd_linger_request. All the details are now hidden within libceph, the interface consists of a simple pair of watch/unwatch functions and ceph_osdc_notify_ack(). ceph_osdc_watch() does return ceph_osd_linger_request, but only to keep the lifetime management simple. ceph_osdc_notify_ack() accepts an optional data payload, which is relayed back to the notifier. Portions of this patch are loosely based on work by Douglas Fuller and Mike Christie . Signed-off-by: Ilya Dryomov

ceph: fix security xattr deadlock

2016-03-25T17:51:55+00:00

When security is enabled, security module can call filesystem's getxattr/setxattr callbacks during d_instantiate(). For cephfs, d_instantiate() is usually called by MDS' dispatch thread, while handling MDS reply. If the MDS reply does not include xattrs and corresponding caps, getxattr/setxattr need to send a new request to MDS and waits for the reply. This makes MDS' dispatch sleep, nobody handles later MDS replies. The fix is make sure lookup/atomic_open reply include xattrs and corresponding caps. So getxattr can be handled by cached xattrs. This requires some modification to both MDS and request message. (Client tells MDS what caps it wants; MDS encodes proper caps in the reply) Smack security module may call setxattr during d_instantiate(). Unlike getxattr, we can't force MDS to issue CEPH_CAP_XATTR_EXCL to us. So just make setxattr return error when called by MDS' dispatch thread. Signed-off-by: Yan, Zheng

libceph: revamp subs code, switch to SUBSCRIBE2 protocol

2016-03-25T17:51:38+00:00

It is currently hard-coded in the mon_client that mdsmap and monmap subs are continuous, while osdmap sub is always "onetime". To better handle full clusters/pools in the osd_client, we need to be able to issue continuous osdmap subs. Revamp subs code to allow us to specify for each sub whether it should be continuous or not. Although not strictly required for the above, switch to SUBSCRIBE2 protocol while at it, eliminating the ambiguity between a request for "every map since X" and a request for "just the latest" when we don't have a map yet (i.e. have epoch 0). SUBSCRIBE2 feature bit is now required - it's been supported since pre-argonaut (2010). Move "got mdsmap" call to the end of ceph_mdsc_handle_map() - calling in before we validate the epoch and successfully install the new map can mess up mon_client sub state. Signed-off-by: Ilya Dryomov

ceph: rename snapshot support

2015-04-22T15:33:41+00:00

Signed-off-by: Yan, Zheng

ceph: handle SESSION_FORCE_RO message

2015-02-19T10:31:37+00:00

mark session as readonly and wake up all cap waiters. Signed-off-by: Yan, Zheng

libceph: nuke pool op infrastructure

2015-02-19T10:31:37+00:00

On Mon, Dec 22, 2014 at 5:35 PM, Sage Weil wrote: > On Mon, 22 Dec 2014, Ilya Dryomov wrote: >> Actually, pool op stuff has been unused for over two years - looks like >> it was added for rbd create_snap and that got ripped out in 2012. It's >> unlikely we'd ever need to manage pools or snaps from the kernel client >> so I think it makes sense to nuke it. Sage? > > Yep! Signed-off-by: Ilya Dryomov

ceph: use getattr request to fetch inline data

2014-12-17T17:09:52+00:00

Add a new parameter 'locked_page' to ceph_do_getattr(). If inline data in getattr reply will be copied to the page. Signed-off-by: Yan, Zheng