linux.git/net/ceph, branch v4.9-rc2

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

2016-10-18T21:13:37+00:00

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

2016-10-05T21:02:10+00:00

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

2016-10-05T21:02:04+00:00

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()

2016-10-03T14:13:50+00:00

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()

2016-10-03T14:13:50+00:00

Signed-off-by: Ilya Dryomov

rbd: add 'client_addr' sysfs rbd device attribute

2016-08-24T21:49:16+00:00

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

2016-08-24T21:49:16+00:00

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

2016-08-24T21:49:16+00:00

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

libceph: rename ceph_client_id() -> ceph_client_gid()

2016-08-24T21:49:16+00:00

It's gid / global_id in other places.

Signed-off-by: Ilya Dryomov 
Reviewed-by: Mike Christie 
Reviewed-by: Alex Elder

libceph: support for blacklisting clients

2016-08-24T21:49:15+00:00

Reuse ceph_mon_generic_request infrastructure for sending monitor
commands.  In particular, add support for 'blacklist add' to prevent
other, non-responsive clients from making further updates.

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