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 notification failed. \
103 Error was %s.\n", strerror(errno) ));
104 smb_read_error = READ_ERROR;
109 * Do a query to get the
110 * device and inode of the file that has the break
111 * request outstanding.
114 if(sys_fcntl_ptr(oplock_pipe_read, F_OPLKSTAT, &os) < 0) {
115 DEBUG(0,("irix_oplock_receive_message: fcntl of kernel notification failed. \
116 Error was %s.\n", strerror(errno) ));
117 if(errno == EAGAIN) {
119 * Duplicate kernel break message - ignore.
121 memset(buffer, '\0', KERNEL_OPLOCK_BREAK_MSG_LEN);
124 smb_read_error = READ_ERROR;
129 * We only have device and inode info here - we have to guess that this
130 * is the first fsp open with this dev,ino pair.
133 if ((fsp = file_find_di_first((SMB_DEV_T)os.os_dev, (SMB_INO_T)os.os_ino)) == NULL) {
134 DEBUG(0,("irix_oplock_receive_message: unable to find open file with dev = %x, inode = %.0f\n",
135 (unsigned int)os.os_dev, (double)os.os_ino ));
139 DEBUG(5,("irix_oplock_receive_message: kernel oplock break request received for \
140 dev = %x, inode = %.0f\n, file_id = %ul", (unsigned int)fsp->dev, (double)fsp->inode, fsp->file_id ));
145 /****************************************************************************
146 Attempt to set an kernel oplock on a file.
147 ****************************************************************************/
149 static BOOL irix_set_kernel_oplock(files_struct *fsp, int oplock_type)
151 if (sys_fcntl_long(fsp->fh->fd, F_OPLKREG, oplock_pipe_write) == -1) {
152 if(errno != EAGAIN) {
153 DEBUG(0,("irix_set_kernel_oplock: Unable to get kernel oplock on file %s, dev = %x, \
154 inode = %.0f, file_id = %ul. Error was %s\n",
155 fsp->fsp_name, (unsigned int)fsp->dev, (double)fsp->inode, fsp->file_id,
158 DEBUG(5,("irix_set_kernel_oplock: Refused oplock on file %s, fd = %d, dev = %x, \
159 inode = %.0f, file_id = %ul. Another process had the file open.\n",
160 fsp->fsp_name, fsp->fh->fd, (unsigned int)fsp->dev, (double)fsp->inode, fsp->file_id ));
165 DEBUG(10,("irix_set_kernel_oplock: got kernel oplock on file %s, dev = %x, inode = %.0f, file_id = %ul\n",
166 fsp->fsp_name, (unsigned int)fsp->dev, (double)fsp->inode, fsp->file_id));
171 /****************************************************************************
172 Release a kernel oplock on a file.
173 ****************************************************************************/
175 static void irix_release_kernel_oplock(files_struct *fsp)
179 * Check and print out the current kernel
180 * oplock state of this file.
182 int state = sys_fcntl_long(fsp->fh->fd, F_OPLKACK, -1);
183 dbgtext("irix_release_kernel_oplock: file %s, dev = %x, inode = %.0f file_id = %ul, has kernel \
184 oplock state of %x.\n", fsp->fsp_name, (unsigned int)fsp->dev,
185 (double)fsp->inode, fsp->file_id, state );
189 * Remove the kernel oplock on this file.
191 if(sys_fcntl_long(fsp->fh->fd, F_OPLKACK, OP_REVOKE) < 0) {
193 dbgtext("irix_release_kernel_oplock: Error when removing kernel oplock on file " );
194 dbgtext("%s, dev = %x, inode = %.0f, file_id = %ul. Error was %s\n",
195 fsp->fsp_name, (unsigned int)fsp->dev,
196 (double)fsp->inode, fsp->file_id, strerror(errno) );
201 /****************************************************************************
202 Set *maxfd to include oplock read pipe.
203 ****************************************************************************/
205 static BOOL irix_oplock_msg_waiting(fd_set *fds)
207 if (oplock_pipe_read == -1)
210 return FD_ISSET(oplock_pipe_read,fds);
213 /****************************************************************************
214 Setup kernel oplocks.
215 ****************************************************************************/
217 struct kernel_oplocks *irix_init_kernel_oplocks(void)
220 static struct kernel_oplocks koplocks;
222 if (!irix_oplocks_available())
226 DEBUG(0,("setup_kernel_oplock_pipe: Unable to create pipe. Error was %s\n",
231 oplock_pipe_read = pfd[0];
232 oplock_pipe_write = pfd[1];
234 koplocks.receive_message = irix_oplock_receive_message;
235 koplocks.set_oplock = irix_set_kernel_oplock;
236 koplocks.release_oplock = irix_release_kernel_oplock;
237 koplocks.msg_waiting = irix_oplock_msg_waiting;
238 koplocks.notification_fd = oplock_pipe_read;
243 void oplock_irix_dummy(void) {}
244 #endif /* HAVE_KERNEL_OPLOCKS_IRIX */