[PATCH] namespaces: incorporate fs namespace into nsproxy

[linux-2.6-omap-h63xx.git] / include / linux / sched.h

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 7ef899c47c29296b14f28030cab737fc6dc30700..670b89a20070c9d5a2283faa1a6f0346ce7b2f4a 100644 (file)
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -118,7 +118,6 @@ extern unsigned long avenrun[];             /* Load averages */
 
 extern unsigned long total_forks;
 extern int nr_threads;
-extern int last_pid;
 DECLARE_PER_CPU(unsigned long, process_counts);
 extern int nr_processes(void);
 extern unsigned long nr_running(void);
@@ -239,7 +238,7 @@ extern signed long schedule_timeout_interruptible(signed long timeout);
 extern signed long schedule_timeout_uninterruptible(signed long timeout);
 asmlinkage void schedule(void);
 
-struct namespace;
+struct nsproxy;
 
 /* Maximum number of active map areas.. This is a random (large) number */
 #define DEFAULT_MAX_MAP_COUNT  65536
@@ -897,8 +896,8 @@ struct task_struct {
        struct fs_struct *fs;
 /* open file information */
        struct files_struct *files;
-/* namespace */
-       struct namespace *namespace;
+/* namespaces */
+       struct nsproxy *nsproxy;
 /* signal handlers */
        struct signal_struct *signal;
        struct sighand_struct *sighand;
@@ -1020,6 +1019,26 @@ static inline pid_t process_group(struct task_struct *tsk)
        return tsk->signal->pgrp;
 }
 
+static inline struct pid *task_pid(struct task_struct *task)
+{
+       return task->pids[PIDTYPE_PID].pid;
+}
+
+static inline struct pid *task_tgid(struct task_struct *task)
+{
+       return task->group_leader->pids[PIDTYPE_PID].pid;
+}
+
+static inline struct pid *task_pgrp(struct task_struct *task)
+{
+       return task->group_leader->pids[PIDTYPE_PGID].pid;
+}
+
+static inline struct pid *task_session(struct task_struct *task)
+{
+       return task->group_leader->pids[PIDTYPE_SID].pid;
+}
+
 /**
  * pid_alive - check that a task structure is not stale
  * @p: Task structure to be checked.
@@ -1247,10 +1266,15 @@ extern int send_sig_info(int, struct siginfo *, struct task_struct *);
 extern int send_group_sig_info(int, struct siginfo *, struct task_struct *);
 extern int force_sigsegv(int, struct task_struct *);
 extern int force_sig_info(int, struct siginfo *, struct task_struct *);
+extern int __kill_pgrp_info(int sig, struct siginfo *info, struct pid *pgrp);
+extern int kill_pgrp_info(int sig, struct siginfo *info, struct pid *pgrp);
+extern int kill_pid_info(int sig, struct siginfo *info, struct pid *pid);
+extern int kill_pid_info_as_uid(int, struct siginfo *, struct pid *, uid_t, uid_t, u32);
+extern int kill_pgrp(struct pid *pid, int sig, int priv);
+extern int kill_pid(struct pid *pid, int sig, int priv);
 extern int __kill_pg_info(int sig, struct siginfo *info, pid_t pgrp);
 extern int kill_pg_info(int, struct siginfo *, pid_t);
 extern int kill_proc_info(int, struct siginfo *, pid_t);
-extern int kill_proc_info_as_uid(int, struct siginfo *, pid_t, uid_t, uid_t, u32);
 extern void do_notify_parent(struct task_struct *, int);
 extern void force_sig(int, struct task_struct *);
 extern void force_sig_specific(int, struct task_struct *);
@@ -1358,6 +1382,17 @@ extern void wait_task_inactive(struct task_struct * p);
 /* de_thread depends on thread_group_leader not being a pid based check */
 #define thread_group_leader(p) (p == p->group_leader)
 
+/* Do to the insanities of de_thread it is possible for a process
+ * to have the pid of the thread group leader without actually being
+ * the thread group leader.  For iteration through the pids in proc
+ * all we care about is that we have a task with the appropriate
+ * pid, we don't actually care if we have the right task.
+ */
+static inline int has_group_leader_pid(struct task_struct *p)
+{
+       return p->pid == p->tgid;
+}
+
 static inline struct task_struct *next_thread(const struct task_struct *p)
 {
        return list_entry(rcu_dereference(p->thread_group.next),