diff options
Diffstat (limited to 'net/rds/send.c')
| -rw-r--r-- | net/rds/send.c | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/net/rds/send.c b/net/rds/send.c index 19dfd025498e..28d09447207b 100644 --- a/net/rds/send.c +++ b/net/rds/send.c @@ -758,6 +758,19 @@ out: return *queued; } +/* + * rds_message is getting to be quite complicated, and we'd like to allocate + * it all in one go. This figures out how big it needs to be up front. + */ +static int rds_rm_size(struct msghdr *msg, int data_len) +{ + int size = 0; + + size += ceil(data_len, PAGE_SIZE) * sizeof(struct scatterlist); + + return size; +} + static int rds_cmsg_send(struct rds_sock *rs, struct rds_message *rm, struct msghdr *msg, int *allocated_mr) { @@ -845,13 +858,23 @@ int rds_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, goto out; } - rm = rds_message_copy_from_user(msg->msg_iov, payload_len); - if (IS_ERR(rm)) { - ret = PTR_ERR(rm); - rm = NULL; + /* size of rm including all sgs */ + ret = rds_rm_size(msg, payload_len); + if (ret < 0) + goto out; + + rm = rds_message_alloc(ret, GFP_KERNEL); + if (!rm) { + ret = -ENOMEM; goto out; } + rm->data.m_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; + rm->m_daddr = daddr; /* rds_conn_create has a spinlock that runs with IRQ off. |