From 372cd7dedfd1ea93a9ae8d9c282e910dc1b76773 Mon Sep 17 00:00:00 2001 From: Andy Grover Date: Wed, 3 Feb 2010 19:40:32 -0800 Subject: [PATCH] RDS: Do not set op_active in r_m_copy_from_user(). Do not allocate sgs for data for 0-length datagrams Set data.op_active in rds_sendmsg() instead of rds_message_copy_from_user(). Signed-off-by: Andy Grover --- net/rds/message.c | 2 -- net/rds/send.c | 13 ++++++++----- 2 files changed, 8 insertions(+), 7 deletions(-) diff --git a/net/rds/message.c b/net/rds/message.c index 4bd9504..f4c3be0 100644 --- a/net/rds/message.c +++ b/net/rds/message.c @@ -330,8 +330,6 @@ int rds_message_copy_from_user(struct rds_message *rm, struct iovec *first_iov, sg++; } - rm->data.op_active = 1; - out: return ret; } diff --git a/net/rds/send.c b/net/rds/send.c index 66dc6b0..ad89a63 100644 --- a/net/rds/send.c +++ b/net/rds/send.c @@ -970,11 +970,14 @@ int rds_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, goto out; } - rm->data.op_sg = rds_message_alloc_sgs(rm, ceil(payload_len, PAGE_SIZE)); - /* XXX fix this to not allocate memory */ - ret = rds_message_copy_from_user(rm, msg->msg_iov, payload_len); - if (ret) - goto out; + /* Attach data to the rm */ + if (payload_len) { + rm->data.op_sg = rds_message_alloc_sgs(rm, ceil(payload_len, PAGE_SIZE)); + ret = rds_message_copy_from_user(rm, msg->msg_iov, payload_len); + if (ret) + goto out; + } + rm->data.op_active = 1; rm->m_daddr = daddr; -- 2.7.4