2 Unix SMB/CIFS implementation.
3 store smbd profiling information in shared memory
4 Copyright (C) Andrew Tridgell 1999
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #define IPC_PERMS ((SHM_R | SHM_W) | (SHM_R>>3) | (SHM_R>>6))
27 static BOOL read_only;
29 struct profile_header *profile_h;
30 struct profile_stats *profile_p;
32 BOOL do_profile_flag = False;
33 BOOL do_profile_times = False;
35 struct timeval profile_starttime;
36 struct timeval profile_endtime;
37 struct timeval profile_starttime_nested;
38 struct timeval profile_endtime_nested;
40 /****************************************************************************
41 receive a set profile level message
42 ****************************************************************************/
43 void profile_message(int msg_type, pid_t src, void *buf, size_t len)
47 memcpy(&level, buf, sizeof(int));
49 case 0: /* turn off profiling */
50 do_profile_flag = False;
51 do_profile_times = False;
52 DEBUG(1,("INFO: Profiling turned OFF from pid %d\n", (int)src));
54 case 1: /* turn on counter profiling only */
55 do_profile_flag = True;
56 do_profile_times = False;
57 DEBUG(1,("INFO: Profiling counts turned ON from pid %d\n", (int)src));
59 case 2: /* turn on complete profiling */
60 do_profile_flag = True;
61 do_profile_times = True;
62 DEBUG(1,("INFO: Full profiling turned ON from pid %d\n", (int)src));
64 case 3: /* reset profile values */
65 memset((char *)profile_p, 0, sizeof(*profile_p));
66 DEBUG(1,("INFO: Profiling values cleared from pid %d\n", (int)src));
71 /****************************************************************************
72 receive a request profile level message
73 ****************************************************************************/
74 void reqprofile_message(int msg_type, pid_t src, void *buf, size_t len)
79 level = 1 + (do_profile_flag?2:0) + (do_profile_times?4:0);
83 DEBUG(1,("INFO: Received REQ_PROFILELEVEL message from PID %u\n",(unsigned int)src));
84 message_send_pid(src, MSG_PROFILELEVEL, &level, sizeof(int), True);
87 /*******************************************************************
88 open the profiling shared memory area
89 ******************************************************************/
90 BOOL profile_setup(BOOL rdonly)
92 struct shmid_ds shm_ds;
97 /* try to use an existing key */
98 shm_id = shmget(PROF_SHMEM_KEY, 0, 0);
100 /* if that failed then create one. There is a race condition here
101 if we are running from inetd. Bad luck. */
103 if (read_only) return False;
104 shm_id = shmget(PROF_SHMEM_KEY, sizeof(*profile_h),
105 IPC_CREAT | IPC_EXCL | IPC_PERMS);
109 DEBUG(0,("Can't create or use IPC area. Error was %s\n",
115 profile_h = (struct profile_header *)shmat(shm_id, 0,
116 read_only?SHM_RDONLY:0);
117 if ((long)profile_p == -1) {
118 DEBUG(0,("Can't attach to IPC area. Error was %s\n",
123 /* find out who created this memory area */
124 if (shmctl(shm_id, IPC_STAT, &shm_ds) != 0) {
125 DEBUG(0,("ERROR shmctl : can't IPC_STAT. Error was %s\n",
130 if (shm_ds.shm_perm.cuid != sec_initial_uid() || shm_ds.shm_perm.cgid != sec_initial_gid()) {
131 DEBUG(0,("ERROR: we did not create the shmem (owned by another user)\n"));
135 if (shm_ds.shm_segsz != sizeof(*profile_h)) {
136 DEBUG(0,("WARNING: profile size is %d (expected %d). Deleting\n",
137 (int)shm_ds.shm_segsz, sizeof(*profile_h)));
138 if (shmctl(shm_id, IPC_RMID, &shm_ds) == 0) {
145 if (!read_only && (shm_ds.shm_nattch == 1)) {
146 memset((char *)profile_h, 0, sizeof(*profile_h));
147 profile_h->prof_shm_magic = PROF_SHM_MAGIC;
148 profile_h->prof_shm_version = PROF_SHM_VERSION;
149 DEBUG(3,("Initialised profile area\n"));
152 profile_p = &profile_h->stats;
153 message_register(MSG_PROFILE, profile_message);
154 message_register(MSG_REQ_PROFILELEVEL, reqprofile_message);