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authorPavel Emelyanov <xemul@parallels.com>2013-03-11 13:13:08 +0400
committerThomas Gleixner <tglx@linutronix.de>2013-04-17 20:51:01 +0200
commit57b8015e07a70301e9ec9f324db1a8b73b5a1e2b (patch)
treefb2b5bae45c3c9f437b57379a8fa1279e220d6d0 /fs
parent48f6a7a511ef8823fdff39afee0320092d43a8a0 (diff)
posix-timers: Show sigevent info in proc file
Previous patch added proc file to list posix timers created by task. Expand the information provided in this file by adding info about notification method, with which timers were created. I.e. after the "ID:" line there go 1. "signal:" line, that shows signal number and sigval bits; 2. "notify:" line, that shows the timer notification method. Thus the timer entry would looke like this: ID: 123 signal: 14/0000000000b005d0 notify: signal/pid.732 This information is enough to understand how timer_create() was called for each particular timer. Signed-off-by: Pavel Emelyanov <xemul@parallels.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Matthew Helsley <matt.helsley@gmail.com> Link: http://lkml.kernel.org/r/513DA024.80404@parallels.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'fs')
-rw-r--r--fs/proc/base.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 01def9f8aa7..a1930860414 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2018,6 +2018,7 @@ struct timers_private {
struct pid *pid;
struct task_struct *task;
struct sighand_struct *sighand;
+ struct pid_namespace *ns;
unsigned long flags;
};
@@ -2060,9 +2061,24 @@ static void timers_stop(struct seq_file *m, void *v)
static int show_timer(struct seq_file *m, void *v)
{
struct k_itimer *timer;
+ struct timers_private *tp = m->private;
+ int notify;
+ static char *nstr[] = {
+ [SIGEV_SIGNAL] = "signal",
+ [SIGEV_NONE] = "none",
+ [SIGEV_THREAD] = "thread",
+ };
timer = list_entry((struct list_head *)v, struct k_itimer, list);
+ notify = timer->it_sigev_notify;
+
seq_printf(m, "ID: %d\n", timer->it_id);
+ seq_printf(m, "signal: %d/%p\n", timer->sigq->info.si_signo,
+ timer->sigq->info.si_value.sival_ptr);
+ seq_printf(m, "notify: %s/%s.%d\n",
+ nstr[notify & ~SIGEV_THREAD_ID],
+ (notify & SIGEV_THREAD_ID) ? "tid" : "pid",
+ pid_nr_ns(timer->it_pid, tp->ns));
return 0;
}
@@ -2084,6 +2100,7 @@ static int proc_timers_open(struct inode *inode, struct file *file)
return -ENOMEM;
tp->pid = proc_pid(inode);
+ tp->ns = inode->i_sb->s_fs_info;
return 0;
}