[PATCH] csa: basic accounting over taskstats

Add some basic accounting fields to the taskstats struct, add a new
kernel/tsacct.c to handle basic accounting data handling upon exit.  A handle
is added to taskstats.c to invoke the basic accounting data handling.

Signed-off-by: Jay Lan <jlan@sgi.com>
Cc: Shailabh Nagar <nagar@watson.ibm.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Jes Sorensen <jes@sgi.com>
Cc: Chris Sturtivant <csturtiv@sgi.com>
Cc: Tony Ernst <tee@sgi.com>
Cc: Guillaume Thouvenin <guillaume.thouvenin@bull.net>
Cc: "Michal Piotrowski" <michal.k.k.piotrowski@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 43 insertions, 5 deletions

diff --git a/include/linux/taskstats.h b/include/linux/taskstats.h
index f1cb6cddd19d..af93a63a5092 100644
--- a/include/linux/taskstats.h
+++ b/include/linux/taskstats.h
@@ -2,6 +2,7 @@
  *
  * Copyright (C) Shailabh Nagar, IBM Corp. 2006
  *           (C) Balbir Singh,   IBM Corp. 2006
+ *           (C) Jay Lan,        SGI, 2006
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of version 2.1 of the GNU Lesser General Public License
@@ -29,16 +30,18 @@
  *      c) add new fields after version comment; maintain 64-bit alignment
  */
 
-#define TASKSTATS_VERSION       1
+
+#define TASKSTATS_VERSION       2
+#define TS_COMM_LEN             16      /* should sync up with TASK_COMM_LEN
+                                         * in linux/sched.h */
 
 struct taskstats {
 
         /* Version 1 */
         __u16   version;
-        __u16   padding[3];     /* Userspace should not interpret the padding
-                                 * field which can be replaced by useful
-                                 * fields if struct taskstats is extended.
-                                 */
+        __u32   ac_exitcode;    /* Exit status */
+        __u8    ac_flag;                /* Record flags */
+        __u8    ac_nice;                /* task_nice */
 
         /* Delay accounting fields start
          *
@@ -88,6 +91,22 @@ struct taskstats {
         __u64   cpu_run_virtual_total;
         /* Delay accounting fields end */
         /* version 1 ends here */
+
+        /* Basic Accounting Fields start */
+        char    ac_comm[TS_COMM_LEN];   /* Command name */
+        __u8    ac_sched;               /* Scheduling discipline */
+        __u8    ac_pad[3];
+        __u32   ac_uid;                 /* User ID */
+        __u32   ac_gid;                 /* Group ID */
+        __u32   ac_pid;                 /* Process ID */
+        __u32   ac_ppid;                /* Parent process ID */
+        __u32   ac_btime;               /* Begin time [sec since 1970] */
+        __u64   ac_etime;               /* Elapsed time [usec] */
+        __u64   ac_utime;               /* User CPU time [usec] */
+        __u64   ac_stime;               /* SYstem CPU time [usec] */
+        __u64   ac_minflt;              /* Minor Page Fault */
+        __u64   ac_majflt;              /* Major Page Fault */
+        /* Basic Accounting Fields end */
 };
 
 
diff --git a/include/linux/tsacct_kern.h b/include/linux/tsacct_kern.h
new file mode 100644
index 000000000000..7e8196a02118
--- /dev/null
+++ b/include/linux/tsacct_kern.h
@@ -0,0 +1,19 @@
+/*
+ * tsacct_kern.h - kernel header for system accounting over taskstats interface
+ *
+ * Copyright (C) Jay Lan        SGI
+ */
+
+#ifndef _LINUX_TSACCT_KERN_H
+#define _LINUX_TSACCT_KERN_H
+
+#include <linux/taskstats.h>
+
+#ifdef CONFIG_TASKSTATS
+extern void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk);
+#else
+static inline void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk)
+{}
+#endif /* CONFIG_TASKSTATS */
+
+#endif