1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
/*
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, pid_t 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)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)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)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)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, pid_t 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)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 */
|
