From 0097875bd41528922fb3bb5f348c53f17e00e2fd Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Thu, 31 Jul 2014 03:10:50 -0700 Subject: proc: Implement /proc/thread-self to point at the directory of the current thread /proc/thread-self is derived from /proc/self. /proc/thread-self points to the directory in proc containing information about the current thread. This funtionality has been missing for a long time, and is tricky to implement in userspace as gettid() is not exported by glibc. More importantly this allows fixing defects in /proc/mounts and /proc/net where in a threaded application today they wind up being empty files when only the initial pthread has exited, causing problems for other threads. Signed-off-by: "Eric W. Biederman" --- fs/proc/root.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'fs/proc/root.c') diff --git a/fs/proc/root.c b/fs/proc/root.c index 5dbadecb234d..48f1c03bc7ed 100644 --- a/fs/proc/root.c +++ b/fs/proc/root.c @@ -149,6 +149,8 @@ static void proc_kill_sb(struct super_block *sb) ns = (struct pid_namespace *)sb->s_fs_info; if (ns->proc_self) dput(ns->proc_self); + if (ns->proc_thread_self) + dput(ns->proc_thread_self); kill_anon_super(sb); put_pid_ns(ns); } @@ -170,6 +172,7 @@ void __init proc_root_init(void) return; proc_self_init(); + proc_thread_self_init(); proc_symlink("mounts", NULL, "self/mounts"); proc_net_init(); -- cgit v1.2.3