linux.git/fs/ceph/caps.c, branch v4.12

ceph: handle epoch barriers in cap messages

2017-05-04T07:19:21+00:00

Have the client store and update the osdc epoch_barrier when a cap
message comes in with one.

When sending cap messages, send the epoch barrier as well. This allows
clients to inform servers that their released caps may not be used until
a particular OSD map epoch.

Signed-off-by: Jeff Layton 
Reviewed-by: "Yan, Zheng” 
Signed-off-by: Ilya Dryomov

ceph: convert ceph_cap_snap.nref from atomic_t to refcount_t

2017-05-04T07:19:18+00:00

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

sched/headers: Prepare to move signal wakeup & sigpending methods from into

2017-03-02T07:42:32+00:00

Fix up affected files that include this signal functionality via sched.h.

Acked-by: Linus Torvalds 
Cc: Mike Galbraith 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar

ceph: remove special ack vs commit behavior

2017-02-24T18:04:57+00:00

- ask for a commit reply instead of an ack reply in
  __ceph_pool_perm_get()
- don't ask for both ack and commit replies in ceph_sync_write()
- since just only one reply is requested now, i_unsafe_writes list
  will always be empty -- kill ceph_sync_write_wait() and go back to
  a standard ->evict_inode()

Signed-off-by: Ilya Dryomov 
Reviewed-by: Jeff Layton 
Reviewed-by: Sage Weil

ceph: avoid calling ceph_renew_caps() infinitely

2017-02-20T11:16:07+00:00

__ceph_caps_mds_wanted() ignores caps from stale session. So the
return value of __ceph_caps_mds_wanted() can keep the same across
ceph_renew_caps(). This causes try_get_cap_refs() to keep calling
ceph_renew_caps(). The fix is ignore the session valid check for
the try_get_cap_refs() case. If session is stale, just let the
caps requester sleep.

Signed-off-by: Yan, Zheng

ceph: make sure flushing inode in proper session's cap_flushing list

2017-02-20T11:16:07+00:00

when flushing inode's auth cap changes, we need to move it into the
new auth cap session's cap_flushing list

Signed-off-by: Yan, Zheng

ceph: avoid updating mds_wanted too frequently

2017-02-20T11:16:06+00:00

user space may open/close single file frequently. It's not good
to send a clientcaps message to mds for each open/close syscall.

Signed-off-by: Yan, Zheng

ceph: cleanup ACCESS_ONCE -> READ_ONCE

2017-02-20T11:16:05+00:00

This removes the uses of ACCESS_ONCE in favor of READ_ONCE

Signed-off-by: Seraphime Kirkovski 
Signed-off-by: Yan, Zheng

ceph: pass parent inode info to ceph_encode_dentry_release if we have it

2017-02-20T11:16:05+00:00

If we have a parent inode reference already, then we don't need to
go back up the directory tree to find one.

Link: http://tracker.ceph.com/issues/18148
Signed-off-by: Jeff Layton 
Reviewed-by: Yan, Zheng 
Signed-off-by: Ilya Dryomov

ceph: fix unsafe dcache access in ceph_encode_dentry_release

2017-02-20T11:16:05+00:00

Accessing d_parent requires some sort of locking or it could vanish
out from under us. Since we take the d_lock anyway, use that to fetch
d_parent and take a reference to it, and then use that reference to
call ceph_encode_inode_release.

Link: http://tracker.ceph.com/issues/18148
Signed-off-by: Jeff Layton 
Reviewed-by: Yan, Zheng 
Signed-off-by: Ilya Dryomov