[PATCH] Process Events Connector

This patch adds a connector that reports fork, exec, id change, and exit
events for all processes to userspace.  It replaces the fork_advisor patch
that ELSA is currently using.  Applications that may find these events
useful include accounting/auditing (e.g.  ELSA), system activity monitoring
(e.g.  top), security, and resource management (e.g.  CKRM).

Signed-off-by: Matt Helsley <matthltc@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 13 insertions, 0 deletions

diff --git a/kernel/exit.c b/kernel/exit.c
index 537394b25e8d..452a1d116178 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -28,6 +28,7 @@
 #include <linux/cpuset.h>
 #include <linux/syscalls.h>
 #include <linux/signal.h>
+#include <linux/cn_proc.h>
 
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
@@ -863,6 +864,7 @@ fastcall NORET_TYPE void do_exit(long code)
                 module_put(tsk->binfmt->module);
 
         tsk->exit_code = code;
+        proc_exit_connector(tsk);
         exit_notify(tsk);
 #ifdef CONFIG_NUMA
         mpol_free(tsk->mempolicy);
diff --git a/kernel/fork.c b/kernel/fork.c
index 8a069612eac3..efac2c58ec7d 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -42,6 +42,7 @@
 #include <linux/profile.h>
 #include <linux/rmap.h>
 #include <linux/acct.h>
+#include <linux/cn_proc.h>
 
 #include <asm/pgtable.h>
 #include <asm/pgalloc.h>
@@ -1143,6 +1144,7 @@ static task_t *copy_process(unsigned long clone_flags,
                         __get_cpu_var(process_counts)++;
         }
 
+        proc_fork_connector(p);
         if (!current->signal->tty && p->signal->tty)
                 p->signal->tty = NULL;
 
diff --git a/kernel/sys.c b/kernel/sys.c
index 2fa1ed18123c..1e1f41b3fdf6 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -28,6 +28,7 @@
 #include <linux/suspend.h>
 #include <linux/tty.h>
 #include <linux/signal.h>
+#include <linux/cn_proc.h>
 
 #include <linux/compat.h>
 #include <linux/syscalls.h>
@@ -623,6 +624,7 @@ asmlinkage long sys_setregid(gid_t rgid, gid_t egid)
         current->egid = new_egid;
         current->gid = new_rgid;
         key_fsgid_changed(current);
+        proc_id_connector(current, PROC_EVENT_GID);
         return 0;
 }
 
@@ -662,6 +664,7 @@ asmlinkage long sys_setgid(gid_t gid)
                 return -EPERM;
 
         key_fsgid_changed(current);
+        proc_id_connector(current, PROC_EVENT_GID);
         return 0;
 }
   
@@ -751,6 +754,7 @@ asmlinkage long sys_setreuid(uid_t ruid, uid_t euid)
         current->fsuid = current->euid;
 
         key_fsuid_changed(current);
+        proc_id_connector(current, PROC_EVENT_UID);
 
         return security_task_post_setuid(old_ruid, old_euid, old_suid, LSM_SETID_RE);
 }
@@ -798,6 +802,7 @@ asmlinkage long sys_setuid(uid_t uid)
         current->suid = new_suid;
 
         key_fsuid_changed(current);
+        proc_id_connector(current, PROC_EVENT_UID);
 
         return security_task_post_setuid(old_ruid, old_euid, old_suid, LSM_SETID_ID);
 }
@@ -846,6 +851,7 @@ asmlinkage long sys_setresuid(uid_t ruid, uid_t euid, uid_t suid)
                 current->suid = suid;
 
         key_fsuid_changed(current);
+        proc_id_connector(current, PROC_EVENT_UID);
 
         return security_task_post_setuid(old_ruid, old_euid, old_suid, LSM_SETID_RES);
 }
@@ -898,6 +904,7 @@ asmlinkage long sys_setresgid(gid_t rgid, gid_t egid, gid_t sgid)
                 current->sgid = sgid;
 
         key_fsgid_changed(current);
+        proc_id_connector(current, PROC_EVENT_GID);
         return 0;
 }
 
@@ -940,6 +947,7 @@ asmlinkage long sys_setfsuid(uid_t uid)
         }
 
         key_fsuid_changed(current);
+        proc_id_connector(current, PROC_EVENT_UID);
 
         security_task_post_setuid(old_fsuid, (uid_t)-1, (uid_t)-1, LSM_SETID_FS);
 
@@ -968,6 +976,7 @@ asmlinkage long sys_setfsgid(gid_t gid)
                 }
                 current->fsgid = gid;
                 key_fsgid_changed(current);
+                proc_id_connector(current, PROC_EVENT_GID);
         }
         return old_fsgid;
 }