OpenVZ Forum


Home » Mailing lists » Devel » [RFC][PATCH] VPIDs: Virtualization of PIDs (OpenVZ approach)
[RFC][PATCH 4/7] VPIDs: vpid macros in non-VPID case [message #1157 is a reply to message #1153] Thu, 02 February 2006 16:26 Go to previous messageGo to previous message
Kirill Korotaev is currently offline  Kirill Korotaev
Messages: 137
Registered: January 2006
Senior Member
This patch specifies an "interface" to virtual pids. That is
some macros/inlines to obtain pids from tasks, convert pids
to vpids and vice versa and set pids.

Kirill

--- ./include/linux/pid.h.vpid_macro 2006-01-03 06:21:10.000000000 +0300
+++ ./include/linux/pid.h 2006-02-02 14:32:41.162807472 +0300
@@ -19,6 +19,19 @@ struct pid
struct list_head pid_list;
};

+#ifndef CONFIG_VIRTUAL_PIDS
+#define __is_virtual_pid(pid) 0
+#define is_virtual_pid(pid) 0
+#define vpid_to_pid(pid) (pid)
+#define __vpid_to_pid(pid) (pid)
+#define pid_type_to_vpid(type, pid) (pid)
+#define __pid_type_to_vpid(type, pid) (pid)
+#define comb_vpid_to_pid(pid) (pid)
+#define comb_pid_to_vpid(pid) (pid)
+#define alloc_vpid(pid, vpid) (pid)
+#define free_vpid(vpid) do { } while (0)
+#endif
+
#define pid_task(elem, type) \
list_entry(elem, struct task_struct, pids[type].pid_list)

--- ./include/linux/sched.h.vpid_macro 2006-02-02 14:15:55.455698192 +0300
+++ ./include/linux/sched.h 2006-02-02 14:32:41.164807168 +0300
@@ -1257,6 +1257,78 @@ static inline unsigned long *end_of_stac

#endif

+#ifndef CONFIG_VIRTUAL_PIDS
+static inline pid_t virt_pid(struct task_struct *tsk)
+{
+ return tsk->pid;
+}
+
+static inline pid_t virt_tgid(struct task_struct *tsk)
+{
+ return tsk->tgid;
+}
+
+static inline pid_t virt_pgid(struct task_struct *tsk)
+{
+ return tsk->signal->pgrp;
+}
+
+static inline pid_t virt_sid(struct task_struct *tsk)
+{
+ return tsk->signal->session;
+}
+
+static inline pid_t get_task_pid_ve(struct task_struct *tsk,
+ struct task_struct *ve_tsk)
+{
+ return tsk->pid;
+}
+
+static inline pid_t get_task_pid(struct task_struct *tsk)
+{
+ return tsk->pid;
+}
+
+static inline pid_t get_task_tgid(struct task_struct *tsk)
+{
+ return tsk->tgid;
+}
+
+static inline pid_t get_task_pgid(struct task_struct *tsk)
+{
+ return tsk->signal->pgrp;
+}
+
+static inline pid_t get_task_sid(struct task_struct *tsk)
+{
+ return tsk->signal->session;
+}
+
+static inline int set_virt_pid(struct task_struct *tsk, pid_t pid)
+{
+ return 0;
+}
+
+static inline void set_virt_tgid(struct task_struct *tsk, pid_t pid)
+{
+}
+
+static inline void set_virt_pgid(struct task_struct *tsk, pid_t pid)
+{
+}
+
+static inline void set_virt_sid(struct task_struct *tsk, pid_t pid)
+{
+}
+
+static inline pid_t get_task_ppid(struct task_struct *p)
+{
+ if (!pid_alive(p))
+ return 0;
+ return (p->pid > 1 ? p->group_leader->real_parent->tgid : 0);
+}
+#endif
+
/* set thread flags in other task's structures
* - see asm/thread_info.h for TIF_xxxx flags available
*/

Report message to a moderator

[Message index]
 
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Previous Topic: vzmemcheck displays wrong values?
Next Topic: openvz + ipv6
Goto Forum:
  

[ Syndicate this forum (XML) ] [ RSS ] [ PDF ]

Current Time: Sat Aug 30 08:28:19 GMT 2025

Total time taken to generate the page: 0.07916 seconds
Powered by FUDforum Powered by Virtuozzo Containers