From: Christoph Hellwig <hch@lst.de>
To: "David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
Eric Dumazet <edumazet@google.com>
Cc: linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, bpf@vger.kernel.org,
netfilter-devel@vger.kernel.org, coreteam@netfilter.org,
linux-sctp@vger.kernel.org, linux-hams@vger.kernel.org,
linux-bluetooth@vger.kernel.org,
bridge@lists.linux-foundation.org, linux-can@vger.kernel.org,
dccp@vger.kernel.org, linux-decnet-user@lists.sourceforge.net,
linux-wpan@vger.kernel.org, linux-s390@vger.kernel.org,
mptcp@lists.01.org, lvs-devel@vger.kernel.org,
rds-devel@oss.oracle.com, linux-afs@lists.infradead.org,
tipc-discussion@lists.sourceforge.net, linux-x25@vger.kernel.org
Subject: [PATCH 02/26] net/bpfilter: split __bpfilter_process_sockopt
Date: Thu, 23 Jul 2020 08:08:44 +0200 [thread overview]
Message-ID: <20200723060908.50081-3-hch@lst.de> (raw)
In-Reply-To: <20200723060908.50081-1-hch@lst.de>
Split __bpfilter_process_sockopt into a low-level send request routine and
the actual setsockopt hook to split the init time ping from the actual
setsockopt processing.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
net/bpfilter/bpfilter_kern.c | 51 +++++++++++++++++++-----------------
1 file changed, 27 insertions(+), 24 deletions(-)
diff --git a/net/bpfilter/bpfilter_kern.c b/net/bpfilter/bpfilter_kern.c
index 3bac5820062af1..78d561f2c54da7 100644
--- a/net/bpfilter/bpfilter_kern.c
+++ b/net/bpfilter/bpfilter_kern.c
@@ -31,48 +31,51 @@ static void __stop_umh(void)
shutdown_umh();
}
-static int __bpfilter_process_sockopt(struct sock *sk, int optname,
- char __user *optval,
- unsigned int optlen, bool is_set)
+static int bpfilter_send_req(struct mbox_request *req)
{
- struct mbox_request req;
struct mbox_reply reply;
loff_t pos;
ssize_t n;
- int ret = -EFAULT;
- req.is_set = is_set;
- req.pid = current->pid;
- req.cmd = optname;
- req.addr = (uintptr_t)optval;
- req.len = optlen;
if (!bpfilter_ops.info.tgid)
- goto out;
+ return -EFAULT;
pos = 0;
- n = kernel_write(bpfilter_ops.info.pipe_to_umh, &req, sizeof(req),
+ n = kernel_write(bpfilter_ops.info.pipe_to_umh, req, sizeof(*req),
&pos);
- if (n != sizeof(req)) {
+ if (n != sizeof(*req)) {
pr_err("write fail %zd\n", n);
- __stop_umh();
- ret = -EFAULT;
- goto out;
+ goto stop;
}
pos = 0;
n = kernel_read(bpfilter_ops.info.pipe_from_umh, &reply, sizeof(reply),
&pos);
if (n != sizeof(reply)) {
pr_err("read fail %zd\n", n);
- __stop_umh();
- ret = -EFAULT;
- goto out;
+ goto stop;
}
- ret = reply.status;
-out:
- return ret;
+ return reply.status;
+stop:
+ __stop_umh();
+ return -EFAULT;
+}
+
+static int bpfilter_process_sockopt(struct sock *sk, int optname,
+ char __user *optval, unsigned int optlen,
+ bool is_set)
+{
+ struct mbox_request req = {
+ .is_set = is_set,
+ .pid = current->pid,
+ .cmd = optname,
+ .addr = (uintptr_t)optval,
+ .len = optlen,
+ };
+ return bpfilter_send_req(&req);
}
static int start_umh(void)
{
+ struct mbox_request req = { .pid = current->pid };
int err;
/* fork usermode process */
@@ -82,7 +85,7 @@ static int start_umh(void)
pr_info("Loaded bpfilter_umh pid %d\n", pid_nr(bpfilter_ops.info.tgid));
/* health check that usermode process started correctly */
- if (__bpfilter_process_sockopt(NULL, 0, NULL, 0, 0) != 0) {
+ if (bpfilter_send_req(&req) != 0) {
shutdown_umh();
return -EFAULT;
}
@@ -103,7 +106,7 @@ static int __init load_umh(void)
mutex_lock(&bpfilter_ops.lock);
err = start_umh();
if (!err && IS_ENABLED(CONFIG_INET)) {
- bpfilter_ops.sockopt = &__bpfilter_process_sockopt;
+ bpfilter_ops.sockopt = &bpfilter_process_sockopt;
bpfilter_ops.start = &start_umh;
}
mutex_unlock(&bpfilter_ops.lock);
--
2.27.0
next prev parent reply other threads:[~2020-07-23 6:09 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-23 6:08 get rid of the address_space override in setsockopt v2 Christoph Hellwig
2020-07-23 6:08 ` [PATCH 01/26] bpfilter: fix up a sparse annotation Christoph Hellwig
2020-07-23 11:14 ` Luc Van Oostenryck
2020-07-23 6:08 ` Christoph Hellwig [this message]
2020-07-23 6:08 ` [PATCH 03/26] bpfilter: reject kernel addresses Christoph Hellwig
2020-07-23 14:42 ` David Laight
2020-07-23 14:44 ` 'Christoph Hellwig'
2020-07-23 14:56 ` David Laight
2020-07-23 6:08 ` [PATCH 04/26] net: add a new sockptr_t type Christoph Hellwig
2020-07-23 15:40 ` Jan Engelhardt
2020-07-23 16:40 ` Eric Dumazet
2020-07-23 16:44 ` Christoph Hellwig
2020-07-23 6:08 ` [PATCH 05/26] net: switch copy_bpf_fprog_from_user to sockptr_t Christoph Hellwig
2020-07-23 6:08 ` [PATCH 06/26] net: switch sock_setbindtodevice " Christoph Hellwig
2020-07-23 6:08 ` [PATCH 07/26] net: switch sock_set_timeout " Christoph Hellwig
2020-07-23 6:08 ` [PATCH 08/26] " Christoph Hellwig
2020-07-23 8:39 ` [MPTCP] " Matthieu Baerts
2020-07-23 6:08 ` [PATCH 09/26] net/xfrm: switch xfrm_user_policy " Christoph Hellwig
2020-07-23 6:08 ` [PATCH 10/26] netfilter: remove the unused user argument to do_update_counters Christoph Hellwig
2020-07-23 6:08 ` [PATCH 11/26] netfilter: switch xt_copy_counters to sockptr_t Christoph Hellwig
2020-07-23 6:08 ` [PATCH 12/26] netfilter: switch nf_setsockopt " Christoph Hellwig
2020-07-27 15:03 ` Jason A. Donenfeld
2020-07-27 15:06 ` Christoph Hellwig
2020-07-27 16:16 ` Jason A. Donenfeld
2020-07-27 16:23 ` Christoph Hellwig
2020-07-28 8:07 ` David Laight
2020-07-28 8:17 ` Jason A. Donenfeld
2020-07-27 16:16 ` Christoph Hellwig
2020-07-27 16:21 ` Jason A. Donenfeld
2020-07-23 6:08 ` [PATCH 13/26] bpfilter: switch bpfilter_ip_set_sockopt " Christoph Hellwig
2020-07-23 11:16 ` David Laight
2020-07-23 11:44 ` 'Christoph Hellwig'
2020-07-23 6:08 ` [PATCH 14/26] net/ipv4: switch ip_mroute_setsockopt " Christoph Hellwig
2020-07-23 6:08 ` [PATCH 15/26] net/ipv4: merge ip_options_get and ip_options_get_from_user Christoph Hellwig
2020-07-23 6:08 ` [PATCH 16/26] net/ipv4: switch do_ip_setsockopt to sockptr_t Christoph Hellwig
2020-07-23 6:08 ` [PATCH 17/26] net/ipv6: switch ip6_mroute_setsockopt " Christoph Hellwig
2020-07-23 6:09 ` [PATCH 18/26] net/ipv6: split up ipv6_flowlabel_opt Christoph Hellwig
2020-07-23 6:09 ` [PATCH 19/26] net/ipv6: switch ipv6_flowlabel_opt to sockptr_t Christoph Hellwig
2020-07-27 12:15 ` Ido Schimmel
2020-07-27 13:00 ` Christoph Hellwig
2020-07-27 13:33 ` Ido Schimmel
2020-07-27 16:15 ` Christoph Hellwig
2020-07-27 18:22 ` Ido Schimmel
2020-07-27 13:24 ` David Laight
2020-07-23 6:09 ` [PATCH 20/26] net/ipv6: factor out a ipv6_set_opt_hdr helper Christoph Hellwig
2020-07-23 6:09 ` [PATCH 21/26] net/ipv6: switch do_ipv6_setsockopt to sockptr_t Christoph Hellwig
2020-07-23 6:09 ` [PATCH 22/26] net/udp: switch udp_lib_setsockopt " Christoph Hellwig
2020-07-23 6:09 ` [PATCH 23/26] net/tcp: switch ->md5_parse " Christoph Hellwig
2020-07-23 6:09 ` [PATCH 24/26] net/tcp: switch do_tcp_setsockopt " Christoph Hellwig
2020-07-23 6:09 ` [PATCH 25/26] net: pass a sockptr_t into ->setsockopt Christoph Hellwig
2020-07-23 8:39 ` [MPTCP] " Matthieu Baerts
2020-08-06 22:21 ` Eric Dumazet
2020-08-07 7:21 ` Christoph Hellwig
2020-08-07 9:18 ` David Laight
2020-08-07 18:29 ` Eric Dumazet
2020-08-08 13:54 ` David Laight
2020-07-23 6:09 ` [PATCH 26/26] net: optimize the sockptr_t for unified kernel/user address spaces Christoph Hellwig
2020-07-24 22:43 ` get rid of the address_space override in setsockopt v2 David Miller
2020-07-26 7:03 ` Christoph Hellwig
2020-07-26 7:08 ` Andreas Schwab
2020-07-26 7:46 ` David Miller
2020-07-27 9:51 ` David Laight
2020-07-27 13:48 ` Al Viro
2020-07-27 14:09 ` David Laight
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