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Commit 1fc52481 authored by Venkateswararao Jujjuri (JV)'s avatar Venkateswararao Jujjuri (JV) Committed by Eric Van Hensbergen
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[net/9p] Write side zerocopy changes for 9P2000.L protocol. 



Modify p9_client_write() to check the transport preference and act accordingly.
If the preference is P9_TRANS_PREF_PAYLOAD_SEP, send the payload
separately instead of putting it directly on PDU.

Signed-off-by: default avatarVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
parent bb2f8a55

net/9p/client.c

+15 −6
Original line number Original line Diff line number Diff line
@@ -1333,12 +1333,21 @@ p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, 




	if (count < rsize)

	if (count < rsize)

		rsize = count;

		rsize = count;



	/* Don't bother zerocopy form small IO (< 1024) */

	if (((clnt->trans_mod->pref & P9_TRANS_PREF_PAYLOAD_MASK) ==

				P9_TRANS_PREF_PAYLOAD_SEP) && (rsize > 1024)) {

		req = p9_client_rpc(clnt, P9_TWRITE, "dqE", fid->fid, offset,

				rsize, data, udata);

	} else {



		if (data)

		if (data)

		req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, offset,

			req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid,

								rsize, data);

					offset, rsize, data);

		else

		else

		req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, offset,

			req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid,

								rsize, udata);

					offset, rsize, udata);

	}

	if (IS_ERR(req)) {

	if (IS_ERR(req)) {

		err = PTR_ERR(req);

		err = PTR_ERR(req);

		goto error;

		goto error;