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revert "proc: fix the threaded proc self"

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Revert commit c6caeb7c4544608e8ae62731334661fc396c7f85 ("proc: fix the
threaded /proc/self"), since Eric says "The patch really is wrong.
There is at least one corner case in procps that cares."

Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: "Guillaume Chazarain" <guichaz@yahoo.fr>
Cc: "Pavel Emelyanov" <xemul@openvz.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrew Morton 2008-02-08 15:00:43 -08:00 committed by Linus Torvalds
parent 0cf975e169
commit b55fcb22d4
1 changed files with 6 additions and 6 deletions
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12
fs/proc/base.c
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@ -2102,22 +2102,22 @@ static int proc_self_readlink(struct dentry *dentry, char __user *buffer,
int buflen)
{
struct pid_namespace *ns = dentry->d_sb->s_fs_info;
pid_t pid = task_pid_nr_ns(current, ns);
pid_t tgid = task_tgid_nr_ns(current, ns);
char tmp[PROC_NUMBUF];
if (!pid)
if (!tgid)
return -ENOENT;
sprintf(tmp, "%d", pid);
sprintf(tmp, "%d", tgid);
return vfs_readlink(dentry,buffer,buflen,tmp);
}
static void *proc_self_follow_link(struct dentry *dentry, struct nameidata *nd)
{
struct pid_namespace *ns = dentry->d_sb->s_fs_info;
pid_t pid = task_pid_nr_ns(current, ns);
pid_t tgid = task_tgid_nr_ns(current, ns);
char tmp[PROC_NUMBUF];
if (!pid)
if (!tgid)
return ERR_PTR(-ENOENT);
sprintf(tmp, "%d", pid);
sprintf(tmp, "%d", task_tgid_nr_ns(current, ns));
return ERR_PTR(vfs_follow_link(nd,tmp));
}