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.
25 #define IPC_PERMS ((SHM_R | SHM_W) | (SHM_R>>3) | (SHM_R>>6))
26 #endif /* WITH_PROFILE */
29 static BOOL read_only;
31 struct profile_header *profile_h;
32 struct profile_stats *profile_p;
34 BOOL do_profile_flag = False;
35 BOOL do_profile_times = False;
37 struct timeval profile_starttime;
38 struct timeval profile_endtime;
39 struct timeval profile_starttime_nested;
40 struct timeval profile_endtime_nested;
42 /****************************************************************************
43 receive a set profile level message
44 ****************************************************************************/
45 void profile_message(int msg_type, pid_t src, void *buf, size_t len)
49 memcpy(&level, buf, sizeof(int));
52 case 0: /* turn off profiling */
53 do_profile_flag = False;
54 do_profile_times = False;
55 DEBUG(1,("INFO: Profiling turned OFF from pid %d\n", (int)src));
57 case 1: /* turn on counter profiling only */
58 do_profile_flag = True;
59 do_profile_times = False;
60 DEBUG(1,("INFO: Profiling counts turned ON from pid %d\n", (int)src));
62 case 2: /* turn on complete profiling */
63 do_profile_flag = True;
64 do_profile_times = True;
65 DEBUG(1,("INFO: Full profiling turned ON from pid %d\n", (int)src));
67 case 3: /* reset profile values */
68 memset((char *)profile_p, 0, sizeof(*profile_p));
69 DEBUG(1,("INFO: Profiling values cleared from pid %d\n", (int)src));
72 #else /* WITH_PROFILE */
73 DEBUG(1,("INFO: Profiling support unavailable in this build.\n"));
74 #endif /* WITH_PROFILE */
77 /****************************************************************************
78 receive a request profile level message
79 ****************************************************************************/
80 void reqprofile_message(int msg_type, pid_t src, void *buf, size_t len)
85 level = 1 + (do_profile_flag?2:0) + (do_profile_times?4:0);
89 DEBUG(1,("INFO: Received REQ_PROFILELEVEL message from PID %u\n",(unsigned int)src));
90 message_send_pid(src, MSG_PROFILELEVEL, &level, sizeof(int), True);
93 /*******************************************************************
94 open the profiling shared memory area
95 ******************************************************************/
97 BOOL profile_setup(BOOL rdonly)
99 struct shmid_ds shm_ds;
104 /* try to use an existing key */
105 shm_id = shmget(PROF_SHMEM_KEY, 0, 0);
107 /* if that failed then create one. There is a race condition here
108 if we are running from inetd. Bad luck. */
110 if (read_only) return False;
111 shm_id = shmget(PROF_SHMEM_KEY, sizeof(*profile_h),
112 IPC_CREAT | IPC_EXCL | IPC_PERMS);
116 DEBUG(0,("Can't create or use IPC area. Error was %s\n",
122 profile_h = (struct profile_header *)shmat(shm_id, 0,
123 read_only?SHM_RDONLY:0);
124 if ((long)profile_p == -1) {
125 DEBUG(0,("Can't attach to IPC area. Error was %s\n",
130 /* find out who created this memory area */
131 if (shmctl(shm_id, IPC_STAT, &shm_ds) != 0) {
132 DEBUG(0,("ERROR shmctl : can't IPC_STAT. Error was %s\n",
137 if (shm_ds.shm_perm.cuid != sec_initial_uid() || shm_ds.shm_perm.cgid != sec_initial_gid()) {
138 DEBUG(0,("ERROR: we did not create the shmem (owned by another user)\n"));
142 if (shm_ds.shm_segsz != sizeof(*profile_h)) {
143 DEBUG(0,("WARNING: profile size is %d (expected %d). Deleting\n",
144 (int)shm_ds.shm_segsz, sizeof(*profile_h)));
145 if (shmctl(shm_id, IPC_RMID, &shm_ds) == 0) {
152 if (!read_only && (shm_ds.shm_nattch == 1)) {
153 memset((char *)profile_h, 0, sizeof(*profile_h));
154 profile_h->prof_shm_magic = PROF_SHM_MAGIC;
155 profile_h->prof_shm_version = PROF_SHM_VERSION;
156 DEBUG(3,("Initialised profile area\n"));
159 profile_p = &profile_h->stats;
160 message_register(MSG_PROFILE, profile_message);
161 message_register(MSG_REQ_PROFILELEVEL, reqprofile_message);
164 #endif /* WITH_PROFILE */