[git pull] vfs.git pile 1

[Al Viro]

More sendmsg work; this is a fairly separate isolated stuff (there's
a continuation around lustre, but that one was too late to soak in
-next), thus the separate pull request.  One trivial conflict in
drivers/block/nbd.c, proposed resolution in vfs.git#merge-1

The following changes since commit b4b8664d291ac1998e0f0bcdc96b6397f0fe68b3:

  arm64: don't pull uaccess.h into *.S (2016-12-26 13:05:17 -0500)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git work.sendmsg

for you to fetch changes up to 4038a2a37e3595c299aecdaa20cb01ceb9c78303:

  Merge branches 'sendmsg.misc' and 'sendmsg.ncpfs' into work.sendmsg (2016-12-26 21:38:34 -0500)

----------------------------------------------------------------
Al Viro (13):
      [drbd] use sock_sendmsg()
      [nbd] switch sock_xmit() to sock_{send,recv}msg()
      [nbd] pass iov_iter to nbd_xmit()
      iscsi_target: deal with short writes on the tx side
      usbip_recv(): switch to sock_recvmsg()
      ceph: switch to sock_recvmsg()
      rds: remove dead code
      afs_send_pages(): use ITER_BVEC
      ceph_tcp_sendpage(): use ITER_BVEC sendmsg
      ncpfs: sendmsg does *not* bugger iovec these days
      ncpfs: don't mess with manually advancing iovec on send
      ncpfs: switch to sock_sendmsg()
      Merge branches 'sendmsg.misc' and 'sendmsg.ncpfs' into work.sendmsg

 drivers/block/drbd/drbd_main.c           |  11 ++-
 drivers/block/nbd.c                      |  76 +++++++++------------
 drivers/target/iscsi/iscsi_target_util.c |  64 +++++++-----------
 drivers/usb/usbip/usbip_common.c         |  32 +++------
 fs/afs/rxrpc.c                           |  15 ++---
 fs/ncpfs/sock.c                          | 111 ++++++++++++-------------------
 net/ceph/messenger.c                     |  44 +++++++-----
 net/rds/page.c                           |  29 --------
 net/rds/rds.h                            |   7 --
 9 files changed, 147 insertions(+), 242 deletions(-)