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[PATCH] add process_session() helper routine

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Replace occurences of task->signal->session by a new process_session() helper
routine.

It will be useful for pid namespaces to abstract the session pid number.

Signed-off-by: Cedric Le Goater <clg@fr.ibm.com>
Cc: Kirill Korotaev <dev@openvz.org>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: Sukadev Bhattiprolu <sukadev@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Cedric Le Goater 2006-12-08 02:37:54 -08:00 • committed by Linus Torvalds
parent ef55d53caa
commit 937949d9ed
11 changed files with 35 additions and 29 deletions
Download patch file Download diff file Expand all files Collapse all files

19
kernel/exit.c
View file

@ -193,14 +193,14 @@ int session_of_pgrp(int pgrp)
read_lock(&tasklist_lock);
do_each_task_pid(pgrp, PIDTYPE_PGID, p) {
if (p->signal->session > 0) {
sid = p->signal->session;
if (process_session(p) > 0) {
sid = process_session(p);
goto out;
}
} while_each_task_pid(pgrp, PIDTYPE_PGID, p);
p = find_task_by_pid(pgrp);
if (p)
sid = p->signal->session;
sid = process_session(p);
out:
read_unlock(&tasklist_lock);
@ -225,8 +225,8 @@ static int will_become_orphaned_pgrp(int pgrp, struct task_struct *ignored_task)
|| p->exit_state
|| is_init(p->real_parent))
continue;
if (process_group(p->real_parent) != pgrp
&& p->real_parent->signal->session == p->signal->session) {
if (process_group(p->real_parent) != pgrp &&
process_session(p->real_parent) == process_session(p)) {
ret = 0;
break;
}
@ -302,7 +302,7 @@ void __set_special_pids(pid_t session, pid_t pgrp)
{
struct task_struct *curr = current->group_leader;
if (curr->signal->session != session) {
if (process_session(curr) != session) {
detach_pid(curr, PIDTYPE_SID);
curr->signal->session = session;
attach_pid(curr, PIDTYPE_SID, session);
@ -647,10 +647,11 @@ reparent_thread(struct task_struct *p, struct task_struct *father, int traced)
* outside, so the child pgrp is now orphaned.
*/
if ((process_group(p) != process_group(father)) &&
(p->signal->session == father->signal->session)) {
(process_session(p) == process_session(father))) {
int pgrp = process_group(p);
if (will_become_orphaned_pgrp(pgrp, NULL) && has_stopped_jobs(pgrp)) {
if (will_become_orphaned_pgrp(pgrp, NULL) &&
has_stopped_jobs(pgrp)) {
__kill_pg_info(SIGHUP, SEND_SIG_PRIV, pgrp);
__kill_pg_info(SIGCONT, SEND_SIG_PRIV, pgrp);
}
@ -784,7 +785,7 @@ static void exit_notify(struct task_struct *tsk)
t = tsk->real_parent;
if ((process_group(t) != process_group(tsk)) &&
(t->signal->session == tsk->signal->session) &&
(process_session(t) == process_session(tsk)) &&
will_become_orphaned_pgrp(process_group(tsk), tsk) &&
has_stopped_jobs(process_group(tsk))) {
__kill_pg_info(SIGHUP, SEND_SIG_PRIV, process_group(tsk));