linux-stable.git/fs/ceph/file.c, branch linux-4.5.y

ceph: fix snap context leak in error path

2016-02-04T17:25:15+00:00

Signed-off-by: Yan, Zheng

ceph: checking for IS_ERR instead of NULL

2016-02-04T17:25:08+00:00

ceph_osdc_alloc_request() returns NULL on error, it never returns error
pointers.

Fixes: 5be0389dac66 ('ceph: re-send AIO write request when getting -EOLDSNAP error')
Signed-off-by: Dan Carpenter 
Signed-off-by: Ilya Dryomov

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client

2016-01-24T20:34:13+00:00

Pull Ceph updates from Sage Weil:
 "The two main changes are aio support in CephFS, and a series that
  fixes several issues in the authentication key timeout/renewal code.

  On top of that are a variety of cleanups and minor bug fixes"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  libceph: remove outdated comment
  libceph: kill off ceph_x_ticket_handler::validity
  libceph: invalidate AUTH in addition to a service ticket
  libceph: fix authorizer invalidation, take 2
  libceph: clear messenger auth_retry flag if we fault
  libceph: fix ceph_msg_revoke()
  libceph: use list_for_each_entry_safe
  ceph: use i_size_{read,write} to get/set i_size
  ceph: re-send AIO write request when getting -EOLDSNAP error
  ceph: Asynchronous IO support
  ceph: Avoid to propagate the invalid page point
  ceph: fix double page_unlock() in page_mkwrite()
  rbd: delete an unnecessary check before rbd_dev_destroy()
  libceph: use list_next_entry instead of list_entry_next
  ceph: ceph_frag_contains_value can be boolean
  ceph: remove unused functions in ceph_frag.h

wrappers for ->i_mutex access

2016-01-22T23:04:28+00:00

parallel to mutex_{lock,unlock,trylock,is_locked,lock_nested},
inode_foo(inode) being mutex_foo(&inode->i_mutex).

Please, use those for access to ->i_mutex; over the coming cycle
->i_mutex will become rwsem, with ->lookup() done with it held
only shared.

Signed-off-by: Al Viro

ceph: use i_size_{read,write} to get/set i_size

2016-01-21T18:36:08+00:00

Cap message from MDS can update i_size. In that case, we don't
hold i_mutex. So it's unsafe to directly access inode->i_size
while holding i_mutex.

Signed-off-by: Yan, Zheng

ceph: re-send AIO write request when getting -EOLDSNAP error

2016-01-21T18:36:08+00:00

When receiving -EOLDSNAP from OSD, we need to re-send corresponding
write request. Due to locking issue, we can send new request inside
another OSD request's complete callback. So we use worker to re-send
request for AIO write.

Signed-off-by: Yan, Zheng

ceph: Asynchronous IO support

2016-01-21T18:36:07+00:00

The basic idea of AIO support is simple, just call kiocb::ki_complete()
in OSD request's complete callback. But there are several special cases.

when IO span multiple objects, we need to wait until all OSD requests
are complete, then call kiocb::ki_complete(). Error handling in this case
is tricky too. For simplify, AIO both span multiple objects and extends
i_size are not allowed.

Another special case is check EOF for reading (other client can write to
the file and extend i_size concurrently). For simplify, the direct-IO/AIO
code path does do the check, fallback to normal syn read instead.

Signed-off-by: Yan, Zheng

ceph: combine as many iovec as possile into one OSD request

2015-11-02T22:36:47+00:00

Both ceph_sync_direct_write and ceph_sync_read iterate iovec elements
one by one, send one OSD request for each iovec. This is sub-optimal,
We can combine serveral iovec into one page vector, and send an OSD
request for the whole page vector.

Signed-off-by: Zhu, Caifeng 
Signed-off-by: Yan, Zheng

ceph: get inode size for each append write

2015-09-09T06:52:29+00:00

Signed-off-by: Yan, Zheng

ceph: no need to get parent inode in ceph_open

2015-09-08T20:14:29+00:00

parent inode is needed in creating new inode case.  For ceph_open,
the target inode already exists.

Signed-off-by: Jianpeng Ma 
Signed-off-by: Yan, Zheng