linux-toradex.git/include/net/9p, branch v4.16-rc4 Linux kernel for Apalis and Colibri modules 9p: Implement show_options 2017-07-11T10:08:58+00:00 David Howells dhowells@redhat.com 2017-07-05T15:25:37+00:00 c4fac9100456995c10b65c13be84554258ed7fc8 Implement the show_options superblock op for 9p as part of a bid to get rid of s_options and generic_show_options() to make it easier to implement a context-based mount where the mount options can be passed individually over a file descriptor. Signed-off-by: David Howells <dhowells@redhat.com> cc: Eric Van Hensbergen <ericvh@gmail.com> cc: Ron Minnich <rminnich@sandia.gov> cc: Latchesar Ionkov <lucho@ionkov.net> cc: v9fs-developer@lists.sourceforge.net Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> 
Implement the show_options superblock op for 9p as part of a bid to get
rid of s_options and generic_show_options() to make it easier to implement
a context-based mount where the mount options can be passed individually
over a file descriptor.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Eric Van Hensbergen <ericvh@gmail.com>
cc: Ron Minnich <rminnich@sandia.gov>
cc: Latchesar Ionkov <lucho@ionkov.net>
cc: v9fs-developer@lists.sourceforge.net
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9p: constify ->d_name handling 2017-01-12T09:01:17+00:00 Al Viro viro@zeniv.linux.org.uk 2017-01-12T09:01:17+00:00 7880b43bdfc9580700ee4568c75c383a5bcdd2ca Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9p: switch p9_client_read() to passing struct iov_iter * 2015-04-12T02:28:27+00:00 Al Viro viro@zeniv.linux.org.uk 2015-04-02T03:42:28+00:00 e1200fe68f20759f359698f8a8dc81d06d1265f5 ... and make it loop Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> 
... and make it loop

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9p: switch p9_client_write() to passing it struct iov_iter * 2015-04-12T02:28:25+00:00 Al Viro viro@zeniv.linux.org.uk 2015-04-02T00:17:51+00:00 070b3656cf228eaaef7b28b59264c5c7cdbdd0fb ... and make it loop until it's done Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> 
... and make it loop until it's done

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
net/9p: switch the guts of p9_client_{read,write}() to iov_iter 2015-04-12T02:28:25+00:00 Al Viro viro@zeniv.linux.org.uk 2015-04-01T23:57:53+00:00 4f3b35c157e43107cc7e1f1aa06694e8b22e10bb ... and have get_user_pages_fast() mapping fewer pages than requested to generate a short read/write. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> 
... and have get_user_pages_fast() mapping fewer pages than requested
to generate a short read/write.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
net/9p: remove a comment about pref member which doesn't exist 2014-11-06T19:59:19+00:00 Ryo Munakata ryomnktml@gmail.com 2014-11-05T14:45:58+00:00 5816c3dafb6c63fd5c7b9f3f707c8565811d9916 Signed-off-by: Ryo Munakata <ryomnktml@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
Signed-off-by: Ryo Munakata <ryomnktml@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9pnet: p9_client->conn field is unused. Remove it. 2014-03-25T21:38:16+00:00 Simon Derr simon.derr@bull.net 2014-03-11T09:13:08+00:00 7b4f307276ae3f69fc4d7c4fb6a188c906755d98 Signed-off-by: Simon Derr <simon.derr@bull.net> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com> 
Signed-off-by: Simon Derr <simon.derr@bull.net>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
9P: Get rid of REQ_STATUS_FLSH 2014-03-25T21:38:15+00:00 Simon Derr simon.derr@bull.net 2014-03-10T15:38:52+00:00 0bfd6845c0b5e3df3507d2b4d230478980e7f04a This request state is mostly useless, and properly implementing it for RDMA would require an extra lock to be taken in handle_recv() and in rdma_cancel() to avoid this race: handle_recv() rdma_cancel() . . . if req->state == SENT req->state = RCVD . . req->state = FLSH So just get rid of it. Signed-off-by: Simon Derr <simon.derr@bull.net> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com> 
This request state is mostly useless, and properly implementing it
for RDMA would require an extra lock to be taken in handle_recv()
and in rdma_cancel() to avoid this race:

    handle_recv()           rdma_cancel()
        .                     .
        .                   if req->state == SENT
    req->state = RCVD         .
        .                           req->state = FLSH

So just get rid of it.

Signed-off-by: Simon Derr <simon.derr@bull.net>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
9P: Add cancelled() to the transport functions. 2014-03-25T21:38:11+00:00 Simon Derr simon.derr@bull.net 2014-03-10T15:38:49+00:00 afd8d65411551839b7ab14a539d00075b2793451 And move transport-specific code out of net/9p/client.c Signed-off-by: Simon Derr <simon.derr@bull.net> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com> 
And move transport-specific code out of net/9p/client.c

Signed-off-by: Simon Derr <simon.derr@bull.net>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
9P: Add memory barriers to protect request fields over cb/rpc threads handoff 2014-03-25T21:37:59+00:00 Dominique Martinet dominique.martinet@cea.fr 2014-01-17T17:31:00+00:00 2b6e72ed747f68a038df616efd86744b3644d694 We need barriers to guarantee this pattern works as intended: [w] req->rc, 1 [r] req->status, 1 wmb rmb [w] req->status, 1 [r] req->rc Where the wmb ensures that rc gets written before status, and the rmb ensures that if you observe status == 1, rc is the new value. Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com> 
We need barriers to guarantee this pattern works as intended:
[w] req->rc, 1		[r] req->status, 1
wmb			rmb
[w] req->status, 1	[r] req->rc

Where the wmb ensures that rc gets written before status,
and the rmb ensures that if you observe status == 1, rc is the new value.

Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>