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 struct timeval profile_starttime
;
40 struct timeval profile_endtime
;
41 struct timeval profile_starttime_nested
;
42 struct timeval profile_endtime_nested
;
44 /****************************************************************************
45 receive a set profile level message
46 ****************************************************************************/
47 void profile_message(int msg_type
, struct process_id src
, void *buf
, size_t len
)
51 memcpy(&level
, buf
, sizeof(int));
54 case 0: /* turn off profiling */
55 do_profile_flag
= False
;
56 do_profile_times
= False
;
57 DEBUG(1,("INFO: Profiling turned OFF from pid %d\n",
58 (int)procid_to_pid(&src
)));
60 case 1: /* turn on counter profiling only */
61 do_profile_flag
= True
;
62 do_profile_times
= False
;
63 DEBUG(1,("INFO: Profiling counts turned ON from pid %d\n",
64 (int)procid_to_pid(&src
)));
66 case 2: /* turn on complete profiling */
67 do_profile_flag
= True
;
68 do_profile_times
= True
;
69 DEBUG(1,("INFO: Full profiling turned ON from pid %d\n",
70 (int)procid_to_pid(&src
)));
72 case 3: /* reset profile values */
73 memset((char *)profile_p
, 0, sizeof(*profile_p
));
74 DEBUG(1,("INFO: Profiling values cleared from pid %d\n",
75 (int)procid_to_pid(&src
)));
78 #else /* WITH_PROFILE */
79 DEBUG(1,("INFO: Profiling support unavailable in this build.\n"));
80 #endif /* WITH_PROFILE */
83 /****************************************************************************
84 receive a request profile level message
85 ****************************************************************************/
86 void reqprofile_message(int msg_type
, struct process_id src
,
87 void *buf
, size_t len
)
92 level
= 1 + (do_profile_flag
?2:0) + (do_profile_times
?4:0);
96 DEBUG(1,("INFO: Received REQ_PROFILELEVEL message from PID %u\n",
97 (unsigned int)procid_to_pid(&src
)));
98 message_send_pid(src
, MSG_PROFILELEVEL
, &level
, sizeof(int), True
);
101 /*******************************************************************
102 open the profiling shared memory area
103 ******************************************************************/
105 BOOL
profile_setup(BOOL rdonly
)
107 struct shmid_ds shm_ds
;
112 /* try to use an existing key */
113 shm_id
= shmget(PROF_SHMEM_KEY
, 0, 0);
115 /* if that failed then create one. There is a race condition here
116 if we are running from inetd. Bad luck. */
118 if (read_only
) return False
;
119 shm_id
= shmget(PROF_SHMEM_KEY
, sizeof(*profile_h
),
120 IPC_CREAT
| IPC_EXCL
| IPC_PERMS
);
124 DEBUG(0,("Can't create or use IPC area. Error was %s\n",
130 profile_h
= (struct profile_header
*)shmat(shm_id
, 0,
131 read_only
?SHM_RDONLY
:0);
132 if ((long)profile_p
== -1) {
133 DEBUG(0,("Can't attach to IPC area. Error was %s\n",
138 /* find out who created this memory area */
139 if (shmctl(shm_id
, IPC_STAT
, &shm_ds
) != 0) {
140 DEBUG(0,("ERROR shmctl : can't IPC_STAT. Error was %s\n",
145 if (shm_ds
.shm_perm
.cuid
!= sec_initial_uid() || shm_ds
.shm_perm
.cgid
!= sec_initial_gid()) {
146 DEBUG(0,("ERROR: we did not create the shmem (owned by another user)\n"));
150 if (shm_ds
.shm_segsz
!= sizeof(*profile_h
)) {
151 DEBUG(0,("WARNING: profile size is %d (expected %d). Deleting\n",
152 (int)shm_ds
.shm_segsz
, sizeof(*profile_h
)));
153 if (shmctl(shm_id
, IPC_RMID
, &shm_ds
) == 0) {
160 if (!read_only
&& (shm_ds
.shm_nattch
== 1)) {
161 memset((char *)profile_h
, 0, sizeof(*profile_h
));
162 profile_h
->prof_shm_magic
= PROF_SHM_MAGIC
;
163 profile_h
->prof_shm_version
= PROF_SHM_VERSION
;
164 DEBUG(3,("Initialised profile area\n"));
167 profile_p
= &profile_h
->stats
;
168 message_register(MSG_PROFILE
, profile_message
);
169 message_register(MSG_REQ_PROFILELEVEL
, reqprofile_message
);
172 #endif /* WITH_PROFILE */