From 9b67e26f936cd40a551da98914ed56dc5606686b Mon Sep 17 00:00:00 2001 From: Ursula Braun Date: Wed, 2 May 2018 16:56:46 +0200 Subject: [PATCH] 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 Signed-off-by: David S. Miller --- net/smc/af_smc.c | 33 ++++++++++++++++++++++++++++++--- 1 file changed, 30 insertions(+), 3 deletions(-) diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c index 961b8ef..823ea33 100644 --- a/net/smc/af_smc.c +++ b/net/smc/af_smc.c @@ -29,6 +29,7 @@ #include #include #include +#include #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, -- 2.7.4