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authorUrsula Braun <ubraun@linux.ibm.com>2018-05-02 17:56:46 +0300
committerDavid S. Miller <davem@davemloft.net>2018-05-02 20:29:12 +0300
commit9b67e26f936cd40a551da98914ed56dc5606686b (patch)
treedfda436dbd31637492ecc11a64489888ffc1104e
parented75986f4aaef7822f63bd40c2ce491bdd9c6dec (diff)
downloadlinux-9b67e26f936cd40a551da98914ed56dc5606686b.tar.xz
net/smc: handle ioctls SIOCINQ, SIOCOUTQ, and SIOCOUTQNSD
SIOCINQ returns the amount of unread data in the RMB. SIOCOUTQ returns the amount of unsent or unacked sent data in the send buffer. SIOCOUTQNSD returns the amount of data prepared for sending, but not yet sent. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/smc/af_smc.c33
1 files changed, 30 insertions, 3 deletions
diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index 961b8eff9553..823ea3371575 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -29,6 +29,7 @@
#include <net/sock.h>
#include <net/tcp.h>
#include <net/smc.h>
+#include <asm/ioctls.h>
#include "smc.h"
#include "smc_clc.h"
@@ -1389,12 +1390,38 @@ static int smc_ioctl(struct socket *sock, unsigned int cmd,
unsigned long arg)
{
struct smc_sock *smc;
+ int answ;
smc = smc_sk(sock->sk);
- if (smc->use_fallback)
+ if (smc->use_fallback) {
+ if (!smc->clcsock)
+ return -EBADF;
return smc->clcsock->ops->ioctl(smc->clcsock, cmd, arg);
- else
- return sock_no_ioctl(sock, cmd, arg);
+ }
+ switch (cmd) {
+ case SIOCINQ: /* same as FIONREAD */
+ if (smc->sk.sk_state == SMC_LISTEN)
+ return -EINVAL;
+ answ = atomic_read(&smc->conn.bytes_to_rcv);
+ break;
+ case SIOCOUTQ:
+ /* output queue size (not send + not acked) */
+ if (smc->sk.sk_state == SMC_LISTEN)
+ return -EINVAL;
+ answ = smc->conn.sndbuf_size -
+ atomic_read(&smc->conn.sndbuf_space);
+ break;
+ case SIOCOUTQNSD:
+ /* output queue size (not send only) */
+ if (smc->sk.sk_state == SMC_LISTEN)
+ return -EINVAL;
+ answ = smc_tx_prepared_sends(&smc->conn);
+ break;
+ default:
+ return -ENOIOCTLCMD;
+ }
+
+ return put_user(answ, (int __user *)arg);
}
static ssize_t smc_sendpage(struct socket *sock, struct page *page,