linux-stable.git/fs/ceph/caps.c, branch linux-4.0.y

ceph: avoid block operation when !TASK_RUNNING (ceph_get_caps)

2015-02-19T10:31:38+00:00

we should not do block operation in wait_event_interruptible()'s condition
check function, but reading inline data can block. so move the read inline
data code to ceph_get_caps()

Signed-off-by: Yan, Zheng

ceph: avoid block operation when !TASK_RUNNING (ceph_mdsc_sync)

2015-02-19T10:31:38+00:00

check_cap_flush() calls mutex_lock(), which may block. So we can't
use it as condition check function for wait_event();

Signed-off-by: Yan, Zheng

ceph: improve reference tracking for snaprealm

2015-02-19T10:31:38+00:00

When snaprealm is created, its initial reference count is zero.
But in some rare cases, the newly created snaprealm is not referenced
by anyone. This causes snaprealm with zero reference count not freed.

The fix is set reference count of newly snaprealm to 1. The reference
is return the function who requests to create the snaprealm. When the
function finishes its job, it releases the reference.

Signed-off-by: Yan, Zheng

ceph: handle SESSION_FORCE_RO message

2015-02-19T10:31:37+00:00

mark session as readonly and wake up all cap waiters.

Signed-off-by: Yan, Zheng

ceph: flush inline version

2014-12-17T17:09:53+00:00

After converting inline data to normal data, client need to flush
the new i_inline_version (CEPH_INLINE_NONE) to MDS. This commit makes
cap messages (sent to MDS) contain inline_version and inline_data.
Client always converts inline data to normal data before data write,
so the inline data length part is always zero.

Signed-off-by: Yan, Zheng

ceph: fetch inline data when getting Fcr cap refs

2014-12-17T17:09:52+00:00

we can't use getattr to fetch inline data after getting Fcr caps,
because it can cause deadlock. The solution is try bringing inline
data to page cache when not holding any cap, and hope the inline
data page is still there after getting the Fcr caps. If the page
is still there, pin it in page cache for later IO.

Signed-off-by: Yan, Zheng

ceph: add inline data to pagecache

2014-12-17T17:09:52+00:00

Request reply and cap message can contain inline data. add inline data
to the page cache if there is Fc cap.

Signed-off-by: Yan, Zheng

ceph: parse inline data in MClientReply and MClientCaps

2014-12-17T17:09:52+00:00

Signed-off-by: Yan, Zheng

ceph, rbd: delete unnecessary checks before two function calls

2014-12-17T17:09:50+00:00

The functions ceph_put_snap_context() and iput() test whether their
argument is NULL and then return immediately. Thus the test around the
call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring 
[idryomov@redhat.com: squashed rbd.c hunk, changelog]
Signed-off-by: Ilya Dryomov

ceph: fix flush tid comparision

2014-11-13T19:19:05+00:00

TID of cap flush ack is 64 bits, but ceph_inode_info::flushing_cap_tid
is only 16 bits. 16 bits should be plenty to let the cap flush updates
pipeline appropriately, but we need to cast in the proper direction when
comparing these differently-sized versions. So downcast the 64-bits one
to 16 bits.

Reflects ceph.git commit a5184cf46a6e867287e24aeb731634828467cd98.

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