2 Unix SMB/CIFS implementation.
3 IRIX kernel oplock processing
4 Copyright (C) Andrew Tridgell 1992-1998
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.
23 #if HAVE_KERNEL_OPLOCKS_IRIX
25 static int oplock_pipe_write
= -1;
26 static int oplock_pipe_read
= -1;
28 /****************************************************************************
29 Test to see if IRIX kernel oplocks work.
30 ****************************************************************************/
32 static BOOL
irix_oplocks_available(void)
38 oplock_set_capability(True
, False
);
40 slprintf(tmpname
,sizeof(tmpname
)-1, "%s/koplock.%d", lp_lockdir(), (int)sys_getpid());
43 DEBUG(0,("check_kernel_oplocks: Unable to create pipe. Error was %s\n",
48 if((fd
= sys_open(tmpname
, O_RDWR
|O_CREAT
|O_EXCL
|O_TRUNC
, 0600)) < 0) {
49 DEBUG(0,("check_kernel_oplocks: Unable to open temp test file %s. Error was %s\n",
50 tmpname
, strerror(errno
) ));
59 if(sys_fcntl_long(fd
, F_OPLKREG
, pfd
[1]) == -1) {
60 DEBUG(0,("check_kernel_oplocks: Kernel oplocks are not available on this machine. \
61 Disabling kernel oplock support.\n" ));
68 if(sys_fcntl_long(fd
, F_OPLKACK
, OP_REVOKE
) < 0 ) {
69 DEBUG(0,("check_kernel_oplocks: Error when removing kernel oplock. Error was %s. \
70 Disabling kernel oplock support.\n", strerror(errno
) ));
84 /****************************************************************************
85 * Deal with the IRIX kernel <--> smbd
86 * oplock break protocol.
87 ****************************************************************************/
89 static files_struct
*irix_oplock_receive_message(fd_set
*fds
)
91 extern int smb_read_error
;
97 * Read one byte of zero to clear the
98 * kernel break notify message.
101 if(read(oplock_pipe_read
, &dummy
, 1) != 1) {
102 DEBUG(0,("irix_oplock_receive_message: read of kernel "
103 "notification failed. Error was %s.\n",
105 smb_read_error
= READ_ERROR
;
110 * Do a query to get the
111 * device and inode of the file that has the break
112 * request outstanding.
115 if(sys_fcntl_ptr(oplock_pipe_read
, F_OPLKSTAT
, &os
) < 0) {
116 DEBUG(0,("irix_oplock_receive_message: fcntl of kernel "
117 "notification failed. Error was %s.\n",
119 if(errno
== EAGAIN
) {
121 * Duplicate kernel break message - ignore.
125 smb_read_error
= READ_ERROR
;
130 * We only have device and inode info here - we have to guess that this
131 * is the first fsp open with this dev,ino pair.
134 if ((fsp
= file_find_di_first((SMB_DEV_T
)os
.os_dev
,
135 (SMB_INO_T
)os
.os_ino
)) == NULL
) {
136 DEBUG(0,("irix_oplock_receive_message: unable to find open "
137 "file with dev = %x, inode = %.0f\n",
138 (unsigned int)os
.os_dev
, (double)os
.os_ino
));
142 DEBUG(5,("irix_oplock_receive_message: kernel oplock break request "
143 "received for dev = %x, inode = %.0f\n, file_id = %ul",
144 (unsigned int)fsp
->dev
, (double)fsp
->inode
, fsp
->file_id
));
149 /****************************************************************************
150 Attempt to set an kernel oplock on a file.
151 ****************************************************************************/
153 static BOOL
irix_set_kernel_oplock(files_struct
*fsp
, int oplock_type
)
155 if (sys_fcntl_long(fsp
->fh
->fd
, F_OPLKREG
, oplock_pipe_write
) == -1) {
156 if(errno
!= EAGAIN
) {
157 DEBUG(0,("irix_set_kernel_oplock: Unable to get kernel oplock on file %s, dev = %x, \
158 inode = %.0f, file_id = %ul. Error was %s\n",
159 fsp
->fsp_name
, (unsigned int)fsp
->dev
, (double)fsp
->inode
, fsp
->file_id
,
162 DEBUG(5,("irix_set_kernel_oplock: Refused oplock on file %s, fd = %d, dev = %x, \
163 inode = %.0f, file_id = %ul. Another process had the file open.\n",
164 fsp
->fsp_name
, fsp
->fh
->fd
, (unsigned int)fsp
->dev
, (double)fsp
->inode
, fsp
->file_id
));
169 DEBUG(10,("irix_set_kernel_oplock: got kernel oplock on file %s, dev = %x, inode = %.0f, file_id = %ul\n",
170 fsp
->fsp_name
, (unsigned int)fsp
->dev
, (double)fsp
->inode
, fsp
->file_id
));
175 /****************************************************************************
176 Release a kernel oplock on a file.
177 ****************************************************************************/
179 static void irix_release_kernel_oplock(files_struct
*fsp
)
183 * Check and print out the current kernel
184 * oplock state of this file.
186 int state
= sys_fcntl_long(fsp
->fh
->fd
, F_OPLKACK
, -1);
187 dbgtext("irix_release_kernel_oplock: file %s, dev = %x, inode = %.0f file_id = %ul, has kernel \
188 oplock state of %x.\n", fsp
->fsp_name
, (unsigned int)fsp
->dev
,
189 (double)fsp
->inode
, fsp
->file_id
, state
);
193 * Remove the kernel oplock on this file.
195 if(sys_fcntl_long(fsp
->fh
->fd
, F_OPLKACK
, OP_REVOKE
) < 0) {
197 dbgtext("irix_release_kernel_oplock: Error when removing kernel oplock on file " );
198 dbgtext("%s, dev = %x, inode = %.0f, file_id = %ul. Error was %s\n",
199 fsp
->fsp_name
, (unsigned int)fsp
->dev
,
200 (double)fsp
->inode
, fsp
->file_id
, strerror(errno
) );
205 /****************************************************************************
206 Set *maxfd to include oplock read pipe.
207 ****************************************************************************/
209 static BOOL
irix_oplock_msg_waiting(fd_set
*fds
)
211 if (oplock_pipe_read
== -1)
214 return FD_ISSET(oplock_pipe_read
,fds
);
217 /****************************************************************************
218 Setup kernel oplocks.
219 ****************************************************************************/
221 struct kernel_oplocks
*irix_init_kernel_oplocks(void)
224 static struct kernel_oplocks koplocks
;
226 if (!irix_oplocks_available())
230 DEBUG(0,("setup_kernel_oplock_pipe: Unable to create pipe. Error was %s\n",
235 oplock_pipe_read
= pfd
[0];
236 oplock_pipe_write
= pfd
[1];
238 koplocks
.receive_message
= irix_oplock_receive_message
;
239 koplocks
.set_oplock
= irix_set_kernel_oplock
;
240 koplocks
.release_oplock
= irix_release_kernel_oplock
;
241 koplocks
.msg_waiting
= irix_oplock_msg_waiting
;
242 koplocks
.notification_fd
= oplock_pipe_read
;
247 void oplock_irix_dummy(void) {}
248 #endif /* HAVE_KERNEL_OPLOCKS_IRIX */