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Diffstat (limited to 'net/9p/protocol.c')
-rw-r--r--net/9p/protocol.c21
1 files changed, 21 insertions, 0 deletions
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 =