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 ((S_IRUSR | S_IWUSR) | S_IRGRP | S_IROTH)
26 #endif /* WITH_PROFILE */
30 static BOOL read_only;
33 struct profile_header *profile_h;
34 struct profile_stats *profile_p;
36 BOOL do_profile_flag = False;
37 BOOL do_profile_times = False;
39 /****************************************************************************
40 receive a set profile level message
41 ****************************************************************************/
42 void profile_message(int msg_type, struct process_id src, void *buf, size_t len)
46 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",
53 (int)procid_to_pid(&src)));
55 case 1: /* turn on counter profiling only */
56 do_profile_flag = True;
57 do_profile_times = False;
58 DEBUG(1,("INFO: Profiling counts turned ON from pid %d\n",
59 (int)procid_to_pid(&src)));
61 case 2: /* turn on complete profiling */
62 do_profile_flag = True;
63 do_profile_times = True;
64 DEBUG(1,("INFO: Full profiling turned ON from pid %d\n",
65 (int)procid_to_pid(&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",
70 (int)procid_to_pid(&src)));
73 #else /* WITH_PROFILE */
74 DEBUG(1,("INFO: Profiling support unavailable in this build.\n"));
75 #endif /* WITH_PROFILE */
78 /****************************************************************************
79 receive a request profile level message
80 ****************************************************************************/
81 void reqprofile_message(int msg_type, struct process_id src,
82 void *buf, size_t len)
87 level = 1 + (do_profile_flag?2:0) + (do_profile_times?4:0);
91 DEBUG(1,("INFO: Received REQ_PROFILELEVEL message from PID %u\n",
92 (unsigned int)procid_to_pid(&src)));
93 message_send_pid(src, MSG_PROFILELEVEL, &level, sizeof(int), True);
96 /*******************************************************************
97 open the profiling shared memory area
98 ******************************************************************/
100 BOOL profile_setup(BOOL rdonly)
102 struct shmid_ds shm_ds;
107 /* try to use an existing key */
108 shm_id = shmget(PROF_SHMEM_KEY, 0, 0);
110 /* if that failed then create one. There is a race condition here
111 if we are running from inetd. Bad luck. */
113 if (read_only) return False;
114 shm_id = shmget(PROF_SHMEM_KEY, sizeof(*profile_h),
115 IPC_CREAT | IPC_EXCL | IPC_PERMS);
119 DEBUG(0,("Can't create or use IPC area. Error was %s\n",
125 profile_h = (struct profile_header *)shmat(shm_id, 0,
126 read_only?SHM_RDONLY:0);
127 if ((long)profile_p == -1) {
128 DEBUG(0,("Can't attach to IPC area. Error was %s\n",
133 /* find out who created this memory area */
134 if (shmctl(shm_id, IPC_STAT, &shm_ds) != 0) {
135 DEBUG(0,("ERROR shmctl : can't IPC_STAT. Error was %s\n",
140 if (shm_ds.shm_perm.cuid != sec_initial_uid() || shm_ds.shm_perm.cgid != sec_initial_gid()) {
141 DEBUG(0,("ERROR: we did not create the shmem (owned by another user)\n"));
145 if (shm_ds.shm_segsz != sizeof(*profile_h)) {
146 DEBUG(0,("WARNING: profile size is %d (expected %d). Deleting\n",
147 (int)shm_ds.shm_segsz, sizeof(*profile_h)));
148 if (shmctl(shm_id, IPC_RMID, &shm_ds) == 0) {
155 if (!read_only && (shm_ds.shm_nattch == 1)) {
156 memset((char *)profile_h, 0, sizeof(*profile_h));
157 profile_h->prof_shm_magic = PROF_SHM_MAGIC;
158 profile_h->prof_shm_version = PROF_SHM_VERSION;
159 DEBUG(3,("Initialised profile area\n"));
162 profile_p = &profile_h->stats;
163 message_register(MSG_PROFILE, profile_message);
164 message_register(MSG_REQ_PROFILELEVEL, reqprofile_message);
167 #endif /* WITH_PROFILE */