diff options
| author | Andy Grover <andy.grover@oracle.com> | 2010-01-20 03:14:56 +0100 |
|---|---|---|
| committer | Andy Grover <andy.grover@oracle.com> | 2010-09-09 03:11:54 +0200 |
| commit | d37c9359056f4f07b37e59810f0ece1031e280b2 (patch) | |
| tree | a8521aadd8d6373c0f6944d6447b000ea73aab71 /net/rds/loop.c | |
| parent | RDS/IB: Make all flow control code conditional on i_flowctl (diff) | |
| download | linux-d37c9359056f4f07b37e59810f0ece1031e280b2.tar.xz linux-d37c9359056f4f07b37e59810f0ece1031e280b2.zip | |
RDS: Move loop-only function to loop.c
Also, try to better-document the locking around the
rm and its m_inc in loop.c.
Signed-off-by: Andy Grover <andy.grover@oracle.com>
Diffstat (limited to 'net/rds/loop.c')
| -rw-r--r-- | net/rds/loop.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/net/rds/loop.c b/net/rds/loop.c index 9364de6dcd8b..4a3dd49315b4 100644 --- a/net/rds/loop.c +++ b/net/rds/loop.c @@ -64,7 +64,8 @@ static int rds_loop_xmit(struct rds_connection *conn, struct rds_message *rm, BUG_ON(hdr_off || sg || off); rds_inc_init(&rm->m_inc, conn, conn->c_laddr); - rds_message_addref(rm); /* for the inc */ + /* For the embedded inc. Matching put is in loop_inc_free() */ + rds_message_addref(rm); rds_recv_incoming(conn, conn->c_laddr, conn->c_faddr, &rm->m_inc, GFP_KERNEL, KM_USER0); @@ -77,6 +78,16 @@ static int rds_loop_xmit(struct rds_connection *conn, struct rds_message *rm, return sizeof(struct rds_header) + be32_to_cpu(rm->m_inc.i_hdr.h_len); } +/* + * See rds_loop_xmit(). Since our inc is embedded in the rm, we + * make sure the rm lives at least until the inc is done. + */ +static void rds_loop_inc_free(struct rds_incoming *inc) +{ + struct rds_message *rm = container_of(inc, struct rds_message, m_inc); + rds_message_put(rm); +} + static int rds_loop_xmit_cong_map(struct rds_connection *conn, struct rds_cong_map *map, unsigned long offset) @@ -176,6 +187,6 @@ struct rds_transport rds_loop_transport = { .conn_connect = rds_loop_conn_connect, .conn_shutdown = rds_loop_conn_shutdown, .inc_copy_to_user = rds_message_inc_copy_to_user, - .inc_free = rds_message_inc_free, + .inc_free = rds_loop_inc_free, .t_name = "loopback", }; |