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
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
|
#define OLD_NTDOMAIN 1
/*
Unix SMB/Netbios implementation.
Version 2.x
IRIX kernel oplock processing
Copyright (C) Andrew Tridgell 1992-1998
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"
#if HAVE_KERNEL_OPLOCKS_IRIX
extern int DEBUGLEVEL;
static int oplock_pipe_write = -1;
static int oplock_pipe_read = -1;
/****************************************************************************
test to see if IRIX kernel oplocks work
****************************************************************************/
static BOOL irix_oplocks_available(void)
{
int fd;
int pfd[2];
pstring tmpname;
oplock_set_capability(True, False);
slprintf(tmpname,sizeof(tmpname)-1, "%s/koplock.%d", lp_lockdir(), (int)sys_getpid());
if(pipe(pfd) != 0) {
DEBUG(0,("check_kernel_oplocks: Unable to create pipe. Error was %s\n",
strerror(errno) ));
return False;
}
if((fd = sys_open(tmpname, O_RDWR|O_CREAT|O_EXCL|O_TRUNC, 0600)) < 0) {
DEBUG(0,("check_kernel_oplocks: Unable to open temp test file %s. Error was %s\n",
tmpname, strerror(errno) ));
unlink( tmpname );
close(pfd[0]);
close(pfd[1]);
return False;
}
unlink(tmpname);
if(fcntl(fd, F_OPLKREG, pfd[1]) == -1) {
DEBUG(0,("check_kernel_oplocks: Kernel oplocks are not available on this machine. \
Disabling kernel oplock support.\n" ));
close(pfd[0]);
close(pfd[1]);
close(fd);
return False;
}
if(fcntl(fd, F_OPLKACK, OP_REVOKE) < 0 ) {
DEBUG(0,("check_kernel_oplocks: Error when removing kernel oplock. Error was %s. \
Disabling kernel oplock support.\n", strerror(errno) ));
close(pfd[0]);
close(pfd[1]);
close(fd);
return False;
}
close(pfd[0]);
close(pfd[1]);
close(fd);
return True;
}
/****************************************************************************
* Deal with the IRIX kernel <--> smbd
* oplock break protocol.
****************************************************************************/
static BOOL irix_oplock_receive_message(fd_set *fds, char *buffer, int buffer_len)
{
oplock_stat_t os;
SMB_DEV_T dev;
SMB_INO_T inode;
char dummy;
/*
* Read one byte of zero to clear the
* kernel break notify message.
*/
if(read(oplock_pipe_read, &dummy, 1) != 1) {
DEBUG(0,("receive_local_message: read of kernel notification failed. \
Error was %s.\n", strerror(errno) ));
smb_read_error = READ_ERROR;
return False;
}
/*
* Do a query to get the
* device and inode of the file that has the break
* request outstanding.
*/
if(fcntl(oplock_pipe_read, F_OPLKSTAT, &os) < 0) {
DEBUG(0,("receive_local_message: fcntl of kernel notification failed. \
Error was %s.\n", strerror(errno) ));
if(errno == EAGAIN) {
/*
* Duplicate kernel break message - ignore.
*/
memset(buffer, '\0', KERNEL_OPLOCK_BREAK_MSG_LEN);
return True;
}
smb_read_error = READ_ERROR;
return False;
}
dev = (SMB_DEV_T)os.os_dev;
inode = (SMB_INO_T)os.os_ino;
DEBUG(5,("receive_local_message: kernel oplock break request received for \
dev = %x, inode = %.0f\n", (unsigned int)dev, (double)inode ));
/*
* Create a kernel oplock break message.
*/
/* Setup the message header */
SIVAL(buffer,OPBRK_CMD_LEN_OFFSET,KERNEL_OPLOCK_BREAK_MSG_LEN);
SSVAL(buffer,OPBRK_CMD_PORT_OFFSET,0);
buffer += OPBRK_CMD_HEADER_LEN;
SSVAL(buffer,OPBRK_MESSAGE_CMD_OFFSET,KERNEL_OPLOCK_BREAK_CMD);
memcpy(buffer + KERNEL_OPLOCK_BREAK_DEV_OFFSET, (char *)&dev, sizeof(dev));
memcpy(buffer + KERNEL_OPLOCK_BREAK_INODE_OFFSET, (char *)&inode, sizeof(inode));
return True;
}
/****************************************************************************
Attempt to set an kernel oplock on a file.
****************************************************************************/
static BOOL irix_set_kernel_oplock(files_struct *fsp, int oplock_type)
{
if (fcntl(fsp->fd, F_OPLKREG, oplock_pipe_write) == -1) {
if(errno != EAGAIN) {
DEBUG(0,("set_file_oplock: Unable to get kernel oplock on file %s, dev = %x, \
inode = %.0f. Error was %s\n",
fsp->fsp_name, (unsigned int)fsp->dev, (double)fsp->inode,
strerror(errno) ));
} else {
DEBUG(5,("set_file_oplock: Refused oplock on file %s, fd = %d, dev = %x, \
inode = %.0f. Another process had the file open.\n",
fsp->fsp_name, fsp->fd, (unsigned int)fsp->dev, (double)fsp->inode ));
}
return False;
}
DEBUG(10,("set_file_oplock: got kernel oplock on file %s, dev = %x, inode = %.0f\n",
fsp->fsp_name, (unsigned int)fsp->dev, (double)fsp->inode));
return True;
}
/****************************************************************************
Release a kernel oplock on a file.
****************************************************************************/
static void irix_release_kernel_oplock(files_struct *fsp)
{
if (DEBUGLVL(10)) {
/*
* Check and print out the current kernel
* oplock state of this file.
*/
int state = fcntl(fsp->fd, F_OPLKACK, -1);
dbgtext("release_kernel_oplock: file %s, dev = %x, inode = %.0f has kernel \
oplock state of %x.\n", fsp->fsp_name, (unsigned int)fsp->dev,
(double)fsp->inode, state );
}
/*
* Remove the kernel oplock on this file.
*/
if(fcntl(fsp->fd, F_OPLKACK, OP_REVOKE) < 0) {
if( DEBUGLVL( 0 )) {
dbgtext("release_kernel_oplock: Error when removing kernel oplock on file " );
dbgtext("%s, dev = %x, inode = %.0f. Error was %s\n",
fsp->fsp_name, (unsigned int)fsp->dev,
(double)fsp->inode, strerror(errno) );
}
}
}
/****************************************************************************
parse a kernel oplock message
****************************************************************************/
static BOOL irix_kernel_oplock_parse(char *msg_start, int msg_len, SMB_INO_T *inode, SMB_DEV_T *dev)
{
/* Ensure that the msg length is correct. */
if(msg_len != KERNEL_OPLOCK_BREAK_MSG_LEN) {
DEBUG(0,("incorrect length for KERNEL_OPLOCK_BREAK_CMD (was %d, should be %d).\n",
msg_len, KERNEL_OPLOCK_BREAK_MSG_LEN));
return False;
}
memcpy((char *)inode, msg_start+KERNEL_OPLOCK_BREAK_INODE_OFFSET, sizeof(*inode));
memcpy((char *)dev, msg_start+KERNEL_OPLOCK_BREAK_DEV_OFFSET, sizeof(*dev));
DEBUG(5,("kernel oplock break request for file dev = %x, inode = %.0f\n",
(unsigned int)*dev, (double)*inode));
return True;
}
/****************************************************************************
set *maxfd to include oplock read pipe
****************************************************************************/
static BOOL irix_oplock_msg_waiting(fd_set *fds)
{
if (oplock_pipe_read == -1) return False;
return FD_ISSET(oplock_pipe_read,fds);
}
/****************************************************************************
setup kernel oplocks
****************************************************************************/
struct kernel_oplocks *irix_init_kernel_oplocks(void)
{
int pfd[2];
static struct kernel_oplocks koplocks;
if (!irix_oplocks_available()) return NULL;
if(pipe(pfd) != 0) {
DEBUG(0,("setup_kernel_oplock_pipe: Unable to create pipe. Error was %s\n",
strerror(errno) ));
return False;
}
oplock_pipe_read = pfd[0];
oplock_pipe_write = pfd[1];
koplocks.receive_message = irix_oplock_receive_message;
koplocks.set_oplock = irix_set_kernel_oplock;
koplocks.release_oplock = irix_release_kernel_oplock;
koplocks.parse_message = irix_kernel_oplock_parse;
koplocks.msg_waiting = irix_oplock_msg_waiting;
koplocks.notification_fd = oplock_pipe_read;
return &koplocks;
}
#else
void oplock_irix_dummy(void) {}
#endif /* HAVE_KERNEL_OPLOCKS_IRIX */
#undef OLD_NTDOMAIN
|
