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-rw-r--r--kernel/exit.c67
1 files changed, 34 insertions, 33 deletions
diff --git a/kernel/exit.c b/kernel/exit.c
index fec12eb1247..f132349c032 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -185,21 +185,19 @@ repeat:
* This checks not only the pgrp, but falls back on the pid if no
* satisfactory pgrp is found. I dunno - gdb doesn't work correctly
* without this...
+ *
+ * The caller must hold rcu lock or the tasklist lock.
*/
-int session_of_pgrp(int pgrp)
+struct pid *session_of_pgrp(struct pid *pgrp)
{
struct task_struct *p;
- int sid = 0;
-
- read_lock(&tasklist_lock);
+ struct pid *sid = NULL;
- p = find_task_by_pid_type(PIDTYPE_PGID, pgrp);
+ p = pid_task(pgrp, PIDTYPE_PGID);
if (p == NULL)
- p = find_task_by_pid(pgrp);
+ p = pid_task(pgrp, PIDTYPE_PID);
if (p != NULL)
- sid = process_session(p);
-
- read_unlock(&tasklist_lock);
+ sid = task_session(p);
return sid;
}
@@ -212,53 +210,52 @@ int session_of_pgrp(int pgrp)
*
* "I ask you, have you ever known what it is to be an orphan?"
*/
-static int will_become_orphaned_pgrp(int pgrp, struct task_struct *ignored_task)
+static int will_become_orphaned_pgrp(struct pid *pgrp, struct task_struct *ignored_task)
{
struct task_struct *p;
int ret = 1;
- do_each_task_pid(pgrp, PIDTYPE_PGID, p) {
+ do_each_pid_task(pgrp, PIDTYPE_PGID, p) {
if (p == ignored_task
|| p->exit_state
|| is_init(p->real_parent))
continue;
- if (process_group(p->real_parent) != pgrp &&
- process_session(p->real_parent) == process_session(p)) {
+ if (task_pgrp(p->real_parent) != pgrp &&
+ task_session(p->real_parent) == task_session(p)) {
ret = 0;
break;
}
- } while_each_task_pid(pgrp, PIDTYPE_PGID, p);
+ } while_each_pid_task(pgrp, PIDTYPE_PGID, p);
return ret; /* (sighing) "Often!" */
}
-int is_orphaned_pgrp(int pgrp)
+int is_current_pgrp_orphaned(void)
{
int retval;
read_lock(&tasklist_lock);
- retval = will_become_orphaned_pgrp(pgrp, NULL);
+ retval = will_become_orphaned_pgrp(task_pgrp(current), NULL);
read_unlock(&tasklist_lock);
return retval;
}
-static int has_stopped_jobs(int pgrp)
+static int has_stopped_jobs(struct pid *pgrp)
{
int retval = 0;
struct task_struct *p;
- do_each_task_pid(pgrp, PIDTYPE_PGID, p) {
+ do_each_pid_task(pgrp, PIDTYPE_PGID, p) {
if (p->state != TASK_STOPPED)
continue;
retval = 1;
break;
- } while_each_task_pid(pgrp, PIDTYPE_PGID, p);
+ } while_each_pid_task(pgrp, PIDTYPE_PGID, p);
return retval;
}
/**
- * reparent_to_init - Reparent the calling kernel thread to the init task
- * of the pid space that the thread belongs to.
+ * reparent_to_init - Reparent the calling kernel thread to the init task of the pid space that the thread belongs to.
*
* If a kernel thread is launched as a result of a system call, or if
* it ever exits, it should generally reparent itself to init so that
@@ -431,8 +428,10 @@ static void close_files(struct files_struct * files)
while (set) {
if (set & 1) {
struct file * file = xchg(&fdt->fd[i], NULL);
- if (file)
+ if (file) {
filp_close(file, files);
+ cond_resched();
+ }
}
i++;
set >>= 1;
@@ -649,14 +648,14 @@ reparent_thread(struct task_struct *p, struct task_struct *father, int traced)
* than we are, and it was the only connection
* outside, so the child pgrp is now orphaned.
*/
- if ((process_group(p) != process_group(father)) &&
- (process_session(p) == process_session(father))) {
- int pgrp = process_group(p);
+ if ((task_pgrp(p) != task_pgrp(father)) &&
+ (task_session(p) == task_session(father))) {
+ struct pid *pgrp = task_pgrp(p);
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);
+ __kill_pgrp_info(SIGHUP, SEND_SIG_PRIV, pgrp);
+ __kill_pgrp_info(SIGCONT, SEND_SIG_PRIV, pgrp);
}
}
}
@@ -736,6 +735,7 @@ static void exit_notify(struct task_struct *tsk)
int state;
struct task_struct *t;
struct list_head ptrace_dead, *_p, *_n;
+ struct pid *pgrp;
if (signal_pending(tsk) && !(tsk->signal->flags & SIGNAL_GROUP_EXIT)
&& !thread_group_empty(tsk)) {
@@ -788,12 +788,13 @@ static void exit_notify(struct task_struct *tsk)
t = tsk->real_parent;
- if ((process_group(t) != process_group(tsk)) &&
- (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));
- __kill_pg_info(SIGCONT, SEND_SIG_PRIV, process_group(tsk));
+ pgrp = task_pgrp(tsk);
+ if ((task_pgrp(t) != pgrp) &&
+ (task_session(t) != task_session(tsk)) &&
+ will_become_orphaned_pgrp(pgrp, tsk) &&
+ has_stopped_jobs(pgrp)) {
+ __kill_pgrp_info(SIGHUP, SEND_SIG_PRIV, pgrp);
+ __kill_pgrp_info(SIGCONT, SEND_SIG_PRIV, pgrp);
}
/* Let father know we died