linux/net/ceph, branch v4.9

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: fix legacy layout decode with pool 0

2016-11-10T19:13:08Z

If your data pool was pool 0, ceph_file_layout_from_legacy() transform that to -1 unconditionally, which broke upgrades. We only want do that for a fully zeroed ceph_file_layout, so that it still maps to a file_layout_t. If any fields are set, though, we trust the fl_pgpool to be a valid pool. Fixes: 7627151ea30bc ("libceph: define new ceph_file_layout structure") Link: http://tracker.ceph.com/issues/17825 Signed-off-by: Yan, Zheng Signed-off-by: Ilya Dryomov

mm: replace get_user_pages_unlocked() write/force parameters with gup_flags

2016-10-18T21:13:37Z

This removes the 'write' and 'force' use from get_user_pages_unlocked() and replaces them with 'gup_flags' to make the use of FOLL_FORCE explicit in callers as use of this flag can result in surprising behaviour (and hence bugs) within the mm subsystem. Signed-off-by: Lorenzo Stoakes Reviewed-by: Jan Kara Acked-by: Michal Hocko Signed-off-by: Linus Torvalds

crush: remove redundant local variable

2016-10-05T21:02:10Z

Remove extra x1 variable, it's just temporary placeholder that clutters the code unnecessarily. Reflects ceph.git commit 0d19408d91dd747340d70287b4ef9efd89e95c6b. Signed-off-by: Ilya Dryomov

crush: don't normalize input of crush_ln iteratively

2016-10-05T21:02:04Z

Use __builtin_clz() supported by GCC and Clang to figure out how many bits we should shift instead of shifting by a bit in a loop until the value gets normalized. Improves performance of this function by up to 3x in worst-case scenario and overall straw2 performance by ~10%. Reflects ceph.git commit 110de33ca497d94fc4737e5154d3fe781fa84a0a. Signed-off-by: Ilya Dryomov

libceph: ceph_build_auth() doesn't need ceph_auth_build_hello()

2016-10-03T14:13:50Z

A static bug finder (EBA) on Linux 4.7: Double lock in net/ceph/auth.c second lock at 108: mutex_lock(& ac->mutex); [ceph_auth_build_hello] after calling from 263: ret = ceph_auth_build_hello(ac, msg_buf, msg_len); if ! ac->protocol -> true at 262 first lock at 261: mutex_lock(& ac->mutex); [ceph_build_auth] ceph_auth_build_hello() is never called, because the protocol is always initialized, whether we are checking existing tickets (in delayed_work()) or getting new ones after invalidation (in invalidate_authorizer()). Reported-by: Iago Abal Signed-off-by: Ilya Dryomov

libceph: use CEPH_AUTH_UNKNOWN in ceph_auth_build_hello()

2016-10-03T14:13:50Z

Signed-off-by: Ilya Dryomov

rbd: add 'client_addr' sysfs rbd device attribute

2016-08-24T21:49:16Z

Export client addr/nonce, so userspace can check if a image is being blacklisted. Signed-off-by: Mike Christie [idryomov@gmail.com: ceph_client_addr(), endianess fix] Signed-off-by: Ilya Dryomov

rbd: support for exclusive-lock feature

2016-08-24T21:49:16Z

Add basic support for RBD_FEATURE_EXCLUSIVE_LOCK feature. Maintenance operations (resize, snapshot create, etc) are offloaded to librbd via returning -EOPNOTSUPP - librbd should request the lock and execute the operation. Signed-off-by: Ilya Dryomov Reviewed-by: Mike Christie Tested-by: Mike Christie

rbd: retry watch re-registration periodically

2016-08-24T21:49:16Z

Revamp watch code to support retrying watch re-registration: - add rbd_dev->watch_state for more robust errcb handling - store watch cookie separately to avoid dereferencing watch_handle which is set to NULL on unwatch - move re-register code into a delayed work and retry re-registration every second, unless the client is blacklisted Signed-off-by: Ilya Dryomov Reviewed-by: Mike Christie Tested-by: Mike Christie