/*
- Unix SMB/Netbios implementation.
- Version 1.9.
+ Unix SMB/CIFS implementation.
store smbd profiling information in shared memory
Copyright (C) Andrew Tridgell 1999
#include "includes.h"
-#include <sys/shm.h>
-
-extern int DEBUGLEVEL;
-
-#define IPC_PERMS ((SHM_R | SHM_W) | (SHM_R>>3) | (SHM_R>>6))
+#ifdef WITH_PROFILE
+#define IPC_PERMS ((S_IRUSR | S_IWUSR) | S_IRGRP | S_IROTH)
+#endif /* WITH_PROFILE */
+#ifdef WITH_PROFILE
static int shm_id;
static BOOL read_only;
+#if defined(HAVE_CLOCK_GETTIME)
+clockid_t __profile_clock;
+#endif
+#endif
-struct profile_struct *profile_p;
+struct profile_header *profile_h;
+struct profile_stats *profile_p;
BOOL do_profile_flag = False;
BOOL do_profile_times = False;
-struct timeval profile_starttime;
-struct timeval profile_endtime;
-
/****************************************************************************
receive a set profile level message
****************************************************************************/
-void profile_message(int msg_type, pid_t src, void *buf, size_t len)
+void profile_message(int msg_type, struct process_id src, void *buf, size_t len)
{
int level;
memcpy(&level, buf, sizeof(int));
+#ifdef WITH_PROFILE
switch (level) {
- case 0:
+ case 0: /* turn off profiling */
do_profile_flag = False;
do_profile_times = False;
+ DEBUG(1,("INFO: Profiling turned OFF from pid %d\n",
+ (int)procid_to_pid(&src)));
break;
- case 1:
+ case 1: /* turn on counter profiling only */
do_profile_flag = True;
do_profile_times = False;
+ DEBUG(1,("INFO: Profiling counts turned ON from pid %d\n",
+ (int)procid_to_pid(&src)));
break;
- case 2:
+ case 2: /* turn on complete profiling */
do_profile_flag = True;
do_profile_times = True;
+ DEBUG(1,("INFO: Full profiling turned ON from pid %d\n",
+ (int)procid_to_pid(&src)));
+ break;
+ case 3: /* reset profile values */
+ memset((char *)profile_p, 0, sizeof(*profile_p));
+ DEBUG(1,("INFO: Profiling values cleared from pid %d\n",
+ (int)procid_to_pid(&src)));
break;
}
- DEBUG(1,("Profile level set to %d from pid %d\n", level, (int)src));
+#else /* WITH_PROFILE */
+ DEBUG(1,("INFO: Profiling support unavailable in this build.\n"));
+#endif /* WITH_PROFILE */
+}
+
+/****************************************************************************
+receive a request profile level message
+****************************************************************************/
+void reqprofile_message(int msg_type, struct process_id src,
+ void *buf, size_t len)
+{
+ int level;
+
+#ifdef WITH_PROFILE
+ level = 1 + (do_profile_flag?2:0) + (do_profile_times?4:0);
+#else
+ level = 0;
+#endif
+ DEBUG(1,("INFO: Received REQ_PROFILELEVEL message from PID %u\n",
+ (unsigned int)procid_to_pid(&src)));
+ message_send_pid(src, MSG_PROFILELEVEL, &level, sizeof(int), True);
}
/*******************************************************************
open the profiling shared memory area
******************************************************************/
+#ifdef WITH_PROFILE
BOOL profile_setup(BOOL rdonly)
{
struct shmid_ds shm_ds;
read_only = rdonly;
+#if defined(HAVE_CLOCK_GETTIME)
+ if (this_is_smp()) {
+ /* This is faster that gettimeofday, but not fast enough to
+ * leave it enabled in production.
+ */
+ __profile_clock = CLOCK_MONOTONIC;
+ } else {
+ /* CLOCK_PROCESS_CPUTIME_ID is sufficiently fast that the
+ * always profiling times is plausible. Unfortunately it is
+ * only accurate if we can guarantee we will not be scheduled
+ * onto a different CPU between samples. Until there is some
+ * way to set processor affinity, we can only use this on
+ * uniprocessors.
+ */
+ __profile_clock = CLOCK_PROCESS_CPUTIME_ID;
+ }
+#endif
+
again:
/* try to use an existing key */
shm_id = shmget(PROF_SHMEM_KEY, 0, 0);
if we are running from inetd. Bad luck. */
if (shm_id == -1) {
if (read_only) return False;
- shm_id = shmget(PROF_SHMEM_KEY, sizeof(*profile_p),
+ shm_id = shmget(PROF_SHMEM_KEY, sizeof(*profile_h),
IPC_CREAT | IPC_EXCL | IPC_PERMS);
}
}
- profile_p = (struct profile_struct *)shmat(shm_id, 0,
+ profile_h = (struct profile_header *)shmat(shm_id, 0,
read_only?SHM_RDONLY:0);
if ((long)profile_p == -1) {
DEBUG(0,("Can't attach to IPC area. Error was %s\n",
return False;
}
- if (shm_ds.shm_perm.cuid != 0 || shm_ds.shm_perm.cgid != 0) {
- DEBUG(0,("ERROR: root did not create the shmem\n"));
+ if (shm_ds.shm_perm.cuid != sec_initial_uid() ||
+ shm_ds.shm_perm.cgid != sec_initial_gid()) {
+ DEBUG(0,("ERROR: we did not create the shmem "
+ "(owned by another user, uid %u, gid %u)\n",
+ shm_ds.shm_perm.cuid,
+ shm_ds.shm_perm.cgid));
return False;
}
- if (shm_ds.shm_segsz != sizeof(*profile_p)) {
+ if (shm_ds.shm_segsz != sizeof(*profile_h)) {
DEBUG(0,("WARNING: profile size is %d (expected %d). Deleting\n",
- (int)shm_ds.shm_segsz, sizeof(*profile_p)));
+ (int)shm_ds.shm_segsz, sizeof(*profile_h)));
if (shmctl(shm_id, IPC_RMID, &shm_ds) == 0) {
goto again;
} else {
}
if (!read_only && (shm_ds.shm_nattch == 1)) {
- memset((char *)profile_p, 0, sizeof(*profile_p));
- profile_p->prof_shm_magic = PROF_SHM_MAGIC;
- profile_p->prof_shm_version = PROF_SHM_VERSION;
+ memset((char *)profile_h, 0, sizeof(*profile_h));
+ profile_h->prof_shm_magic = PROF_SHM_MAGIC;
+ profile_h->prof_shm_version = PROF_SHM_VERSION;
DEBUG(3,("Initialised profile area\n"));
}
+ profile_p = &profile_h->stats;
message_register(MSG_PROFILE, profile_message);
+ message_register(MSG_REQ_PROFILELEVEL, reqprofile_message);
return True;
}
-
+#endif /* WITH_PROFILE */
git.samba.org / vlendec / samba-autobuild / .git / blobdiff