From 1dd0bd2b14032037d40a316dd52370f1713fa62b Mon Sep 17 00:00:00 2001 From: Jon Paul Maloy Date: Fri, 22 Aug 2014 18:09:06 -0400 Subject: [PATCH] tipc: introduce new function tipc_msg_create() The function tipc_msg_init() has turned out to be of limited value in many cases. It take too few parameters to be usable for creating a complete message, it makes too many assumptions about what the message should be used for, and it does not allocate any buffer to be returned to the caller. Therefore, we now introduce the new function tipc_msg_create(), which takes all the parameters needed to create a full message, and returns a buffer of the requested size. The new function will be very useful for the changes we will be doing in later commits in this series. Signed-off-by: Jon Maloy Reviewed-by: Erik Hugne Reviewed-by: Ying Xue Signed-off-by: David S. Miller --- net/tipc/msg.c | 31 +++++++++++++++++++++++++++++-- net/tipc/msg.h | 4 ++++ 2 files changed, 33 insertions(+), 2 deletions(-) diff --git a/net/tipc/msg.c b/net/tipc/msg.c index 9680be6d388a..fdb92e247050 100644 --- a/net/tipc/msg.c +++ b/net/tipc/msg.c @@ -56,8 +56,35 @@ void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type, u32 hsize, msg_set_size(m, hsize); msg_set_prevnode(m, tipc_own_addr); msg_set_type(m, type); - msg_set_orignode(m, tipc_own_addr); - msg_set_destnode(m, destnode); + if (hsize > SHORT_H_SIZE) { + msg_set_orignode(m, tipc_own_addr); + msg_set_destnode(m, destnode); + } +} + +struct sk_buff *tipc_msg_create(uint user, uint type, uint hdr_sz, + uint data_sz, u32 dnode, u32 onode, + u32 dport, u32 oport, int errcode) +{ + struct tipc_msg *msg; + struct sk_buff *buf; + + buf = tipc_buf_acquire(hdr_sz + data_sz); + if (unlikely(!buf)) + return NULL; + + msg = buf_msg(buf); + tipc_msg_init(msg, user, type, hdr_sz, dnode); + msg_set_size(msg, hdr_sz + data_sz); + msg_set_prevnode(msg, onode); + msg_set_origport(msg, oport); + msg_set_destport(msg, dport); + msg_set_errcode(msg, errcode); + if (hdr_sz > SHORT_H_SIZE) { + msg_set_orignode(msg, onode); + msg_set_destnode(msg, dnode); + } + return buf; } /* tipc_buf_append(): Append a buffer to the fragment list of another buffer diff --git a/net/tipc/msg.h b/net/tipc/msg.h index 462fa194a6af..3045b2cfbff8 100644 --- a/net/tipc/msg.h +++ b/net/tipc/msg.h @@ -732,6 +732,10 @@ int tipc_msg_eval(struct sk_buff *buf, u32 *dnode); void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type, u32 hsize, u32 destnode); +struct sk_buff *tipc_msg_create(uint user, uint type, uint hdr_sz, + uint data_sz, u32 dnode, u32 onode, + u32 dport, u32 oport, int errcode); + int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf); bool tipc_msg_bundle(struct sk_buff *bbuf, struct sk_buff *buf, u32 mtu); -- 2.20.1