linux-toradex.git/include/linux/ceph/osd_client.h, branch v5.1-rc1

libceph: allow setting abort_on_full for rbd

2019-01-07T21:47:48+00:00

Introduce a new option abort_on_full, default to false. Then
we can get -ENOSPC when the pool is full, or reaches quota.

[ Don't show abort_on_full in /proc/mounts. ]

Signed-off-by: Dongsheng Yang 
Reviewed-by: Ilya Dryomov 
Signed-off-by: Ilya Dryomov

libceph: support the RADOS copy-from operation

2018-10-22T08:28:23+00:00

Add support for performing remote object copies using the 'copy-from'
operation.

[ Add COPY_FROM to get_num_data_items(). ]

Signed-off-by: Luis Henriques 
Reviewed-by: Ilya Dryomov 
Signed-off-by: Ilya Dryomov

libceph: osd_req_op_cls_init() doesn't need to take opcode

2018-10-22T08:28:20+00:00

Signed-off-by: Ilya Dryomov

libceph: use timespec64 for r_mtime

2018-08-02T19:33:14+00:00

The request mtime field is used all over ceph, and is currently
represented as a 'timespec' structure in Linux. This changes it to
timespec64 to allow times beyond 2038, modifying all users at the
same time.

[ Remove now redundant ts variable in writepage_nounlock(). ]

Signed-off-by: Arnd Bergmann 
Reviewed-by: Ilya Dryomov 
Signed-off-by: Ilya Dryomov

libceph: make ceph_osdc_notify{,_ack}() payload_len u32

2018-08-02T19:26:11+00:00

The wire format dictates that payload_len fits into 4 bytes.  Take u32
instead of size_t to reflect that.

All callers pass a small integer, so no changes required.

Signed-off-by: Ilya Dryomov

libceph: make abort_on_full a per-osdc setting

2018-06-04T18:46:00+00:00

The intent behind making it a per-request setting was that it would be
set for writes, but not for reads.  As it is, the flag is set for all
fs/ceph requests except for pool perm check stat request (technically
a read).

ceph_osdc_abort_on_full() skips reads since the previous commit and
I don't see a use case for marking individual requests.

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

libceph: defer __complete_request() to a workqueue

2018-06-04T18:45:58+00:00

In the common case, req->r_callback is called by handle_reply() on the
ceph-msgr worker thread without any locks.  If handle_reply() fails, it
is called with both osd->lock and osdc->lock.  In the map check case,
it is called with just osdc->lock but held for write.  Finally, if the
request is aborted because of -ENOSPC or by ceph_osdc_abort_requests(),
it is called directly on the submitter's thread, again with both locks.

req->r_callback on the submitter's thread is relatively new (introduced
in 4.12) and ripe for deadlocks -- e.g. writeback worker thread waiting
on itself:

  inode_wait_for_writeback+0x26/0x40
  evict+0xb5/0x1a0
  iput+0x1d2/0x220
  ceph_put_wrbuffer_cap_refs+0xe0/0x2c0 [ceph]
  writepages_finish+0x2d3/0x410 [ceph]
  __complete_request+0x26/0x60 [libceph]
  complete_request+0x2e/0x70 [libceph]
  __submit_request+0x256/0x330 [libceph]
  submit_request+0x2b/0x30 [libceph]
  ceph_osdc_start_request+0x25/0x40 [libceph]
  ceph_writepages_start+0xdfe/0x1320 [ceph]
  do_writepages+0x1f/0x70
  __writeback_single_inode+0x45/0x330
  writeback_sb_inodes+0x26a/0x600
  __writeback_inodes_wb+0x92/0xc0
  wb_writeback+0x274/0x330
  wb_workfn+0x2d5/0x3b0

Defer __complete_request() to a workqueue in all failure cases so it's
never on the same thread as ceph_osdc_start_request() and always called
with no locks held.

Link: http://tracker.ceph.com/issues/23978
Signed-off-by: Ilya Dryomov 
Acked-by: Jeff Layton 
Reviewed-by: "Yan, Zheng"

libceph: introduce ceph_osdc_abort_requests()

2018-06-04T18:45:57+00:00

This will be used by the filesystem for "umount -f".

Signed-off-by: Ilya Dryomov

libceph, rbd: add error handling for osd_req_op_cls_init()

2018-06-04T18:45:54+00:00

Add proper error handling for osd_req_op_cls_init() to replace
BUG_ON statement when failing from memory allocation.

Signed-off-by: Chengguang Xu 
Reviewed-by: Ilya Dryomov 
Signed-off-by: Ilya Dryomov

libceph: add osd_req_op_extent_osd_data_bvecs()

2018-05-10T08:15:05+00:00

... and store num_bvecs for client code's convenience.

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