diff options
| author | Taehee Yoo <ap420073@gmail.com> | 2019-01-09 02:24:34 +0900 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-01-11 18:05:41 -0800 |
| commit | 5b4cb650e569db2e6a09d2fa0ef8eb789a0ac5d8 (patch) | |
| tree | 7ef7c653d79db14d7eec7b445c178255a01e13d8 /net/bpfilter | |
| parent | 73ab1cb2de9e3efe7f818d5453de271e5371df1d (diff) | |
net: bpfilter: use cleanup callback to release umh_info
Now, UMH process is killed, do_exit() calls the umh_info->cleanup callback
to release members of the umh_info.
This patch makes bpfilter_umh's cleanup routine to use the
umh_info->cleanup callback.
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bpfilter')
| -rw-r--r-- | net/bpfilter/bpfilter_kern.c | 23 |
1 files changed, 10 insertions, 13 deletions
diff --git a/net/bpfilter/bpfilter_kern.c b/net/bpfilter/bpfilter_kern.c index 7acfc83087d5..a68940b74c01 100644 --- a/net/bpfilter/bpfilter_kern.c +++ b/net/bpfilter/bpfilter_kern.c @@ -13,7 +13,6 @@ extern char bpfilter_umh_start; extern char bpfilter_umh_end; -static struct umh_info info; /* since ip_getsockopt() can run in parallel, serialize access to umh */ static DEFINE_MUTEX(bpfilter_lock); @@ -28,16 +27,13 @@ static void shutdown_umh(struct umh_info *info) force_sig(SIGKILL, tsk); put_task_struct(tsk); } - fput(info->pipe_to_umh); - fput(info->pipe_from_umh); - info->pid = 0; } static void __stop_umh(void) { if (IS_ENABLED(CONFIG_INET)) { - bpfilter_process_sockopt = NULL; - shutdown_umh(&info); + bpfilter_ops.sockopt = NULL; + shutdown_umh(&bpfilter_ops.info); } } @@ -64,9 +60,10 @@ static int __bpfilter_process_sockopt(struct sock *sk, int optname, req.addr = (long __force __user)optval; req.len = optlen; mutex_lock(&bpfilter_lock); - if (!info.pid) + if (!bpfilter_ops.info.pid) goto out; - n = __kernel_write(info.pipe_to_umh, &req, sizeof(req), &pos); + n = __kernel_write(bpfilter_ops.info.pipe_to_umh, &req, sizeof(req), + &pos); if (n != sizeof(req)) { pr_err("write fail %zd\n", n); __stop_umh(); @@ -74,7 +71,8 @@ static int __bpfilter_process_sockopt(struct sock *sk, int optname, goto out; } pos = 0; - n = kernel_read(info.pipe_from_umh, &reply, sizeof(reply), &pos); + 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(); @@ -92,13 +90,12 @@ static int __init load_umh(void) int err; /* fork usermode process */ - info.cmdline = "bpfilter_umh"; err = fork_usermode_blob(&bpfilter_umh_start, &bpfilter_umh_end - &bpfilter_umh_start, - &info); + &bpfilter_ops.info); if (err) return err; - pr_info("Loaded bpfilter_umh pid %d\n", info.pid); + pr_info("Loaded bpfilter_umh pid %d\n", bpfilter_ops.info.pid); /* health check that usermode process started correctly */ if (__bpfilter_process_sockopt(NULL, 0, NULL, 0, 0) != 0) { @@ -106,7 +103,7 @@ static int __init load_umh(void) return -EFAULT; } if (IS_ENABLED(CONFIG_INET)) - bpfilter_process_sockopt = &__bpfilter_process_sockopt; + bpfilter_ops.sockopt = &__bpfilter_process_sockopt; return 0; } |