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authorVenkateswararao Jujjuri (JV) <jvrao@linux.vnet.ibm.com>2011-02-16 18:43:20 -0800
committerEric Van Hensbergen <ericvh@gmail.com>2011-03-15 09:57:35 -0500
commit2c66523fd290edeea26cbe8cedd0af167d0f7e5f (patch)
treee2658302dfce599cd42545d0487a5650a187c7bd /net/9p/protocol.c
parent1fc52481c2b886c445bb167dfd16ee6de6922ef7 (diff)
[net/9p] readdir zerocopy changes for 9P2000.L protocol.
Modify p9_client_readdir() to check the transport preference and act according 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 <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Diffstat (limited to 'net/9p/protocol.c')
-rw-r--r--net/9p/protocol.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/net/9p/protocol.c b/net/9p/protocol.c
index 7bca2421bfc8..2ce515b859b3 100644
--- a/net/9p/protocol.c
+++ b/net/9p/protocol.c
@@ -125,6 +125,15 @@ pdu_write_urw(struct p9_fcall *pdu, const char *kdata, const char __user *udata,
return 0;
}
+static size_t
+pdu_write_readdir(struct p9_fcall *pdu, const char *kdata, size_t size)
+{
+ BUG_ON(pdu->size > P9_READDIRHDRSZ);
+ pdu->pkbuf = (char *)kdata;
+ pdu->pbuf_size = size;
+ return 0;
+}
+
/*
b - int8_t
w - int16_t
@@ -466,6 +475,15 @@ p9pdu_vwritef(struct p9_fcall *pdu, int proto_version, const char *fmt,
errcode = -EFAULT;
}
break;
+ case 'F':{
+ int32_t cnt = va_arg(ap, int32_t);
+ const char *k = va_arg(ap, const void *);
+ errcode = p9pdu_writef(pdu, proto_version, "d",
+ cnt);
+ if (!errcode && pdu_write_readdir(pdu, k, cnt))
+ errcode = -EFAULT;
+ }
+ break;
case 'U':{
int32_t count = va_arg(ap, int32_t);
const char __user *udata =