kernel/fs/ceph/caps.c, branch linux-5.1.y

ceph: add mount option to limit caps count

2019-03-05T17:55:17Z

If number of caps exceed the limit, ceph_trim_dentires() also trim dentries with valid leases. Trimming dentry releases references to associated inode, which may evict inode and release caps. By default, there is no limit for caps count. Signed-off-by: "Yan, Zheng" Reviewed-by: Jeff Layton Signed-off-by: Ilya Dryomov

ceph: touch existing cap when handling reply

2019-03-05T17:55:17Z

Move cap to tail of session->s_caps list. So ceph_trim_caps() will trim older caps first. Signed-off-by: "Yan, Zheng" Reviewed-by: Jeff Layton Signed-off-by: Ilya Dryomov

ceph: send cap releases more aggressively

2019-03-05T17:55:16Z

When pending cap releases fill up one message, start a work to send cap release message. (old way is sending cap releases every 5 seconds) Signed-off-by: "Yan, Zheng" Reviewed-by: Jeff Layton Signed-off-by: Ilya Dryomov

ceph: split large reconnect into multiple messages

2019-03-05T17:55:16Z

Signed-off-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov

ceph: clear inode pointer when snap realm gets dropped by its inode

2019-01-21T13:52:41Z

snap realm and corresponding inode have pointers to each other. The two pointer should get clear at the same time. Otherwise, snap realm's pointer may reference freed inode. Cc: stable@vger.kernel.org # 4.17+ Signed-off-by: "Yan, Zheng" Reviewed-by: Luis Henriques Signed-off-by: Ilya Dryomov

ceph: update wanted caps after resuming stale session

2018-12-26T15:08:36Z

mds contains an optimization, it does not re-issue stale caps if client does not want any cap. A special case of the optimization is that client wants some caps, but skipped updating 'wanted'. For this case, client needs to update 'wanted' when stale session get renewed. Signed-off-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov

ceph: skip updating 'wanted' caps if caps are already issued

2018-12-26T15:08:36Z

When reading cached inode that already has Fscr caps, this can avoid two cap messages (one updats 'wanted' caps, one clears 'wanted' caps). Signed-off-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov

ceph: don't request excl caps when mount is readonly

2018-12-26T15:08:36Z

Signed-off-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov

ceph: don't update importing cap's mseq when handing cap export

2018-12-26T15:08:25Z

Updating mseq makes client think importer mds has accepted all prior cap messages and importer mds knows what caps client wants. Actually some cap messages may have been dropped because of mseq mismatch. If mseq is left untouched, importing cap's mds_wanted later will get reset by cap import message. Cc: stable@vger.kernel.org Signed-off-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov

ceph: add non-blocking parameter to ceph_try_get_caps()

2018-10-22T08:28:23Z

ceph_try_get_caps currently calls try_get_cap_refs with the nonblock parameter always set to 'true'. This change adds a new parameter that allows to set it's value. This will be useful for a follow-up patch that will need to get two sets of capabilities for two different inodes without risking a deadlock. Signed-off-by: Luis Henriques Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov