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.
21 #define DBGC_CLASS DBGC_LOCKING
24 #if HAVE_KERNEL_OPLOCKS_IRIX
26 static int oplock_pipe_write
= -1;
27 static int oplock_pipe_read
= -1;
29 /****************************************************************************
30 Test to see if IRIX kernel oplocks work.
31 ****************************************************************************/
33 static BOOL
irix_oplocks_available(void)
39 set_effective_capability(KERNEL_OPLOCK_CAPABILITY
);
41 slprintf(tmpname
,sizeof(tmpname
)-1, "%s/koplock.%d", lp_lockdir(), (int)sys_getpid());
44 DEBUG(0,("check_kernel_oplocks: Unable to create pipe. Error was %s\n",
49 if((fd
= sys_open(tmpname
, O_RDWR
|O_CREAT
|O_EXCL
|O_TRUNC
, 0600)) < 0) {
50 DEBUG(0,("check_kernel_oplocks: Unable to open temp test file %s. Error was %s\n",
51 tmpname
, strerror(errno
) ));
60 if(sys_fcntl_long(fd
, F_OPLKREG
, pfd
[1]) == -1) {
61 DEBUG(0,("check_kernel_oplocks: Kernel oplocks are not available on this machine. \
62 Disabling kernel oplock support.\n" ));
69 if(sys_fcntl_long(fd
, F_OPLKACK
, OP_REVOKE
) < 0 ) {
70 DEBUG(0,("check_kernel_oplocks: Error when removing kernel oplock. Error was %s. \
71 Disabling kernel oplock support.\n", strerror(errno
) ));
85 /****************************************************************************
86 * Deal with the IRIX kernel <--> smbd
87 * oplock break protocol.
88 ****************************************************************************/
90 static files_struct
*irix_oplock_receive_message(fd_set
*fds
)
92 extern int smb_read_error
;
97 /* Ensure we only get one call per select fd set. */
98 FD_CLR(oplock_pipe_read
, fds
);
101 * Read one byte of zero to clear the
102 * kernel break notify message.
105 if(read(oplock_pipe_read
, &dummy
, 1) != 1) {
106 DEBUG(0,("irix_oplock_receive_message: read of kernel "
107 "notification failed. Error was %s.\n",
109 smb_read_error
= READ_ERROR
;
114 * Do a query to get the
115 * device and inode of the file that has the break
116 * request outstanding.
119 if(sys_fcntl_ptr(oplock_pipe_read
, F_OPLKSTAT
, &os
) < 0) {
120 DEBUG(0,("irix_oplock_receive_message: fcntl of kernel "
121 "notification failed. Error was %s.\n",
123 if(errno
== EAGAIN
) {
125 * Duplicate kernel break message - ignore.
129 smb_read_error
= READ_ERROR
;
134 * We only have device and inode info here - we have to guess that this
135 * is the first fsp open with this dev,ino pair.
138 if ((fsp
= file_find_di_first((SMB_DEV_T
)os
.os_dev
,
139 (SMB_INO_T
)os
.os_ino
)) == NULL
) {
140 DEBUG(0,("irix_oplock_receive_message: unable to find open "
141 "file with dev = %x, inode = %.0f\n",
142 (unsigned int)os
.os_dev
, (double)os
.os_ino
));
146 DEBUG(5,("irix_oplock_receive_message: kernel oplock break request "
147 "received for dev = %x, inode = %.0f\n, file_id = %ul",
148 (unsigned int)fsp
->dev
, (double)fsp
->inode
, fsp
->fh
->file_id
));
153 /****************************************************************************
154 Attempt to set an kernel oplock on a file.
155 ****************************************************************************/
157 static BOOL
irix_set_kernel_oplock(files_struct
*fsp
, int oplock_type
)
159 if (sys_fcntl_long(fsp
->fh
->fd
, F_OPLKREG
, oplock_pipe_write
) == -1) {
160 if(errno
!= EAGAIN
) {
161 DEBUG(0,("irix_set_kernel_oplock: Unable to get kernel oplock on file %s, dev = %x, \
162 inode = %.0f, file_id = %ul. Error was %s\n",
163 fsp
->fsp_name
, (unsigned int)fsp
->dev
, (double)fsp
->inode
, fsp
->fh
->file_id
,
166 DEBUG(5,("irix_set_kernel_oplock: Refused oplock on file %s, fd = %d, dev = %x, \
167 inode = %.0f, file_id = %ul. Another process had the file open.\n",
168 fsp
->fsp_name
, fsp
->fh
->fd
, (unsigned int)fsp
->dev
, (double)fsp
->inode
, fsp
->fh
->file_id
));
173 DEBUG(10,("irix_set_kernel_oplock: got kernel oplock on file %s, dev = %x, inode = %.0f, file_id = %ul\n",
174 fsp
->fsp_name
, (unsigned int)fsp
->dev
, (double)fsp
->inode
, fsp
->fh
->file_id
));
179 /****************************************************************************
180 Release a kernel oplock on a file.
181 ****************************************************************************/
183 static void irix_release_kernel_oplock(files_struct
*fsp
)
187 * Check and print out the current kernel
188 * oplock state of this file.
190 int state
= sys_fcntl_long(fsp
->fh
->fd
, F_OPLKACK
, -1);
191 dbgtext("irix_release_kernel_oplock: file %s, dev = %x, inode = %.0f file_id = %ul, has kernel \
192 oplock state of %x.\n", fsp
->fsp_name
, (unsigned int)fsp
->dev
,
193 (double)fsp
->inode
, fsp
->fh
->file_id
, state
);
197 * Remove the kernel oplock on this file.
199 if(sys_fcntl_long(fsp
->fh
->fd
, F_OPLKACK
, OP_REVOKE
) < 0) {
201 dbgtext("irix_release_kernel_oplock: Error when removing kernel oplock on file " );
202 dbgtext("%s, dev = %x, inode = %.0f, file_id = %ul. Error was %s\n",
203 fsp
->fsp_name
, (unsigned int)fsp
->dev
,
204 (double)fsp
->inode
, fsp
->fh
->file_id
, strerror(errno
) );
209 /****************************************************************************
210 See if there is a message waiting in this fd set.
211 Note that fds MAY BE NULL ! If so we must do our own select.
212 ****************************************************************************/
214 static BOOL
irix_oplock_msg_waiting(fd_set
*fds
)
220 if (oplock_pipe_read
== -1)
224 return FD_ISSET(oplock_pipe_read
, fds
);
227 /* Do a zero-time select. We just need to find out if there
228 * are any outstanding messages. We use sys_select_intr as
229 * we need to ignore any signals. */
232 FD_SET(oplock_pipe_read
, &myfds
);
234 to
= timeval_set(0, 0);
235 selrtn
= sys_select_intr(oplock_pipe_read
+1,&myfds
,NULL
,NULL
,&to
);
236 return (selrtn
== 1) ? True
: False
;
239 /****************************************************************************
240 Setup kernel oplocks.
241 ****************************************************************************/
243 struct kernel_oplocks
*irix_init_kernel_oplocks(void)
246 static struct kernel_oplocks koplocks
;
248 if (!irix_oplocks_available())
252 DEBUG(0,("setup_kernel_oplock_pipe: Unable to create pipe. Error was %s\n",
257 oplock_pipe_read
= pfd
[0];
258 oplock_pipe_write
= pfd
[1];
260 koplocks
.receive_message
= irix_oplock_receive_message
;
261 koplocks
.set_oplock
= irix_set_kernel_oplock
;
262 koplocks
.release_oplock
= irix_release_kernel_oplock
;
263 koplocks
.msg_waiting
= irix_oplock_msg_waiting
;
264 koplocks
.notification_fd
= oplock_pipe_read
;
269 void oplock_irix_dummy(void) {}
270 #endif /* HAVE_KERNEL_OPLOCKS_IRIX */