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author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-08-06 14:15:47 +0300 |
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committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-08-06 14:15:47 +0300 |
commit | 94fb1afb14c4f0ceb8c5508ddddac6819f662e95 (patch) | |
tree | 4988e5769dc7482caa7f441475ae31f50bbd37ef /net/ipv4/bpfilter/sockopt.c | |
parent | c4735d990268399da9133b0ad445e488ece009ad (diff) | |
parent | 47ec5303d73ea344e84f46660fff693c57641386 (diff) | |
download | linux-94fb1afb14c4f0ceb8c5508ddddac6819f662e95.tar.xz |
Mgerge remote-tracking branch 'torvalds/master' into perf/core
To sync headers, for instance, in this case tools/perf was ahead of
upstream till Linus merged tip/perf/core to get the
PERF_RECORD_TEXT_POKE changes:
Warning: Kernel ABI header at 'tools/include/uapi/linux/perf_event.h' differs from latest version at 'include/uapi/linux/perf_event.h'
diff -u tools/include/uapi/linux/perf_event.h include/uapi/linux/perf_event.h
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'net/ipv4/bpfilter/sockopt.c')
-rw-r--r-- | net/ipv4/bpfilter/sockopt.c | 36 |
1 files changed, 20 insertions, 16 deletions
diff --git a/net/ipv4/bpfilter/sockopt.c b/net/ipv4/bpfilter/sockopt.c index 0480918bfc7c..545b2640f019 100644 --- a/net/ipv4/bpfilter/sockopt.c +++ b/net/ipv4/bpfilter/sockopt.c @@ -12,18 +12,16 @@ struct bpfilter_umh_ops bpfilter_ops; EXPORT_SYMBOL_GPL(bpfilter_ops); -static void bpfilter_umh_cleanup(struct umh_info *info) +void bpfilter_umh_cleanup(struct umd_info *info) { - mutex_lock(&bpfilter_ops.lock); - bpfilter_ops.stop = true; fput(info->pipe_to_umh); fput(info->pipe_from_umh); - info->pid = 0; - mutex_unlock(&bpfilter_ops.lock); + put_pid(info->tgid); + info->tgid = NULL; } +EXPORT_SYMBOL_GPL(bpfilter_umh_cleanup); -static int bpfilter_mbox_request(struct sock *sk, int optname, - char __user *optval, +static int bpfilter_mbox_request(struct sock *sk, int optname, sockptr_t optval, unsigned int optlen, bool is_set) { int err; @@ -38,7 +36,11 @@ static int bpfilter_mbox_request(struct sock *sk, int optname, goto out; } } - if (bpfilter_ops.stop) { + if (bpfilter_ops.info.tgid && + thread_group_exited(bpfilter_ops.info.tgid)) + bpfilter_umh_cleanup(&bpfilter_ops.info); + + if (!bpfilter_ops.info.tgid) { err = bpfilter_ops.start(); if (err) goto out; @@ -49,29 +51,31 @@ out: return err; } -int bpfilter_ip_set_sockopt(struct sock *sk, int optname, char __user *optval, +int bpfilter_ip_set_sockopt(struct sock *sk, int optname, sockptr_t optval, unsigned int optlen) { return bpfilter_mbox_request(sk, optname, optval, optlen, true); } -int bpfilter_ip_get_sockopt(struct sock *sk, int optname, char __user *optval, - int __user *optlen) +int bpfilter_ip_get_sockopt(struct sock *sk, int optname, + char __user *user_optval, int __user *optlen) { - int len; + sockptr_t optval; + int err, len; if (get_user(len, optlen)) return -EFAULT; - + err = init_user_sockptr(&optval, user_optval, len); + if (err) + return err; return bpfilter_mbox_request(sk, optname, optval, len, false); } static int __init bpfilter_sockopt_init(void) { mutex_init(&bpfilter_ops.lock); - bpfilter_ops.stop = true; - bpfilter_ops.info.cmdline = "bpfilter_umh"; - bpfilter_ops.info.cleanup = &bpfilter_umh_cleanup; + bpfilter_ops.info.tgid = NULL; + bpfilter_ops.info.driver_name = "bpfilter_umh"; return 0; } |