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| author |   Eric W. Biederman <ebiederm@xmission.com> | 2014-07-31 03:10:50 -0700 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2014-08-04 10:07:11 -0700 |
| commit | 0097875bd41528922fb3bb5f348c53f17e00e2fd (patch) | |
| tree | 414cffac820d04e4542dc7654e7ef188f00ba0b2 /fs/proc/root.c | |
| parent | proc: Have net show up under /proc/<tgid>/task/<tid> (diff) | |
| download | linux-dev-0097875bd41528922fb3bb5f348c53f17e00e2fd.tar.xz linux-dev-0097875bd41528922fb3bb5f348c53f17e00e2fd.zip | |
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" <ebiederm@xmission.com>
Diffstat (limited to '')
| -rw-r--r-- | fs/proc/root.c | 3 |
1 files changed, 3 insertions, 0 deletions
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(); |