--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+ store smbd profiling information in shared memory
+ Copyright (C) Andrew Tridgell 1999
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include "includes.h"
+
+#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;
+#endif
+
+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;
+struct timeval profile_starttime_nested;
+struct timeval profile_endtime_nested;
+
+/****************************************************************************
+receive a set profile level message
+****************************************************************************/
+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: /* 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: /* 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: /* 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;
+ }
+#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;
+
+ again:
+ /* try to use an existing key */
+ shm_id = shmget(PROF_SHMEM_KEY, 0, 0);
+
+ /* if that failed then create one. There is a race condition here
+ 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_h),
+ IPC_CREAT | IPC_EXCL | IPC_PERMS);
+ }
+
+ if (shm_id == -1) {
+ DEBUG(0,("Can't create or use IPC area. Error was %s\n",
+ strerror(errno)));
+ return False;
+ }
+
+
+ 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",
+ strerror(errno)));
+ return False;
+ }
+
+ /* find out who created this memory area */
+ if (shmctl(shm_id, IPC_STAT, &shm_ds) != 0) {
+ DEBUG(0,("ERROR shmctl : can't IPC_STAT. Error was %s\n",
+ strerror(errno)));
+ return False;
+ }
+
+ 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)\n"));
+ return False;
+ }
+
+ 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_h)));
+ if (shmctl(shm_id, IPC_RMID, &shm_ds) == 0) {
+ goto again;
+ } else {
+ return False;
+ }
+ }
+
+ if (!read_only && (shm_ds.shm_nattch == 1)) {
+ 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 */
projects / samba / blobdiff