From bb2f8a55153ec58e66a496224504ac9be919c8f1 Mon Sep 17 00:00:00 2001 From: "Venkateswararao Jujjuri (JV)" Date: Fri, 28 Jan 2011 17:05:59 -0800 Subject: [net/9p] Read side zerocopy changes for 9P2000.L protocol. Modify p9_client_read() 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: Venkateswararao Jujjuri Signed-off-by: Eric Van Hensbergen --- net/9p/protocol.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'net/9p/protocol.c') diff --git a/net/9p/protocol.c b/net/9p/protocol.c index 5936c50d0c93..7bca2421bfc8 100644 --- a/net/9p/protocol.c +++ b/net/9p/protocol.c @@ -114,6 +114,17 @@ pdu_write_u(struct p9_fcall *pdu, const char __user *udata, size_t size) return size - len; } +static size_t +pdu_write_urw(struct p9_fcall *pdu, const char *kdata, const char __user *udata, + size_t size) +{ + BUG_ON(pdu->size > P9_IOHDRSZ); + pdu->pubuf = (char __user *)udata; + pdu->pkbuf = (char *)kdata; + pdu->pbuf_size = size; + return 0; +} + /* b - int8_t w - int16_t @@ -445,6 +456,16 @@ p9pdu_vwritef(struct p9_fcall *pdu, int proto_version, const char *fmt, errcode = -EFAULT; } break; + case 'E':{ + int32_t cnt = va_arg(ap, int32_t); + const char *k = va_arg(ap, const void *); + const char *u = va_arg(ap, const void *); + errcode = p9pdu_writef(pdu, proto_version, "d", + cnt); + if (!errcode && pdu_write_urw(pdu, k, u, cnt)) + errcode = -EFAULT; + } + break; case 'U':{ int32_t count = va_arg(ap, int32_t); const char __user *udata = -- cgit v1.2.3