path: root/ipc/msg.c
diff options
authorPavel Emelyanov <xemul@openvz.org>2007-10-18 23:40:14 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-19 11:53:40 -0700
commitb488893a390edfe027bae7a46e9af8083e740668 (patch)
treec469a7f99ad01005a73011c029eb5e5d15454559 /ipc/msg.c
parent3eb07c8c8adb6f0572baba844ba2d9e501654316 (diff)
pid namespaces: changes to show virtual ids to user
This is the largest patch in the set. Make all (I hope) the places where the pid is shown to or get from user operate on the virtual pids. The idea is: - all in-kernel data structures must store either struct pid itself or the pid's global nr, obtained with pid_nr() call; - when seeking the task from kernel code with the stored id one should use find_task_by_pid() call that works with global pids; - when showing pid's numerical value to the user the virtual one should be used, but however when one shows task's pid outside this task's namespace the global one is to be used; - when getting the pid from userspace one need to consider this as the virtual one and use appropriate task/pid-searching functions. [akpm@linux-foundation.org: build fix] [akpm@linux-foundation.org: nuther build fix] [akpm@linux-foundation.org: yet nuther build fix] [akpm@linux-foundation.org: remove unneeded casts] Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org> Cc: Sukadev Bhattiprolu <sukadev@us.ibm.com> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Paul Menage <menage@google.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'ipc/msg.c')
1 files changed, 3 insertions, 3 deletions
diff --git a/ipc/msg.c b/ipc/msg.c
index a03fcb522ff..319468609b7 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -611,7 +611,7 @@ static inline int pipelined_send(struct msg_queue *msq, struct msg_msg *msg)
msr->r_msg = ERR_PTR(-E2BIG);
} else {
msr->r_msg = NULL;
- msq->q_lrpid = msr->r_tsk->pid;
+ msq->q_lrpid = task_pid_vnr(msr->r_tsk);
msq->q_rtime = get_seconds();
@@ -695,7 +695,7 @@ long do_msgsnd(int msqid, long mtype, void __user *mtext,
- msq->q_lspid = current->tgid;
+ msq->q_lspid = task_tgid_vnr(current);
msq->q_stime = get_seconds();
if (!pipelined_send(msq, msg)) {
@@ -810,7 +810,7 @@ long do_msgrcv(int msqid, long *pmtype, void __user *mtext,
msq->q_rtime = get_seconds();
- msq->q_lrpid = current->tgid;
+ msq->q_lrpid = task_tgid_vnr(current);
msq->q_cbytes -= msg->m_ts;
atomic_sub(msg->m_ts, &msg_bytes);