Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * An implementation of a loadable kernel mode driver providing |
| 3 | * multiple kernel/user space bidirectional communications links. |
| 4 | * |
Alan Cox | 526719b | 2008-10-27 15:19:48 +0000 | [diff] [blame] | 5 | * Author: Alan Cox <alan@lxorguk.ukuu.org.uk> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * as published by the Free Software Foundation; either version |
| 10 | * 2 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * Adapted to become the Linux 2.0 Coda pseudo device |
| 13 | * Peter Braam <braam@maths.ox.ac.uk> |
| 14 | * Michael Callahan <mjc@emmy.smith.edu> |
| 15 | * |
| 16 | * Changes for Linux 2.1 |
| 17 | * Copyright (c) 1997 Carnegie-Mellon University |
| 18 | */ |
| 19 | |
| 20 | #include <linux/module.h> |
| 21 | #include <linux/errno.h> |
| 22 | #include <linux/kernel.h> |
| 23 | #include <linux/major.h> |
| 24 | #include <linux/time.h> |
Alexey Dobriyan | a99bbaf | 2009-10-04 16:11:37 +0400 | [diff] [blame] | 25 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/slab.h> |
| 27 | #include <linux/ioport.h> |
| 28 | #include <linux/fcntl.h> |
| 29 | #include <linux/delay.h> |
| 30 | #include <linux/skbuff.h> |
| 31 | #include <linux/proc_fs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <linux/vmalloc.h> |
| 33 | #include <linux/fs.h> |
| 34 | #include <linux/file.h> |
| 35 | #include <linux/poll.h> |
| 36 | #include <linux/init.h> |
| 37 | #include <linux/list.h> |
Yoshihisa Abe | da47c19 | 2010-10-25 02:03:46 -0400 | [diff] [blame] | 38 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <linux/device.h> |
| 40 | #include <asm/io.h> |
| 41 | #include <asm/system.h> |
| 42 | #include <asm/poll.h> |
| 43 | #include <asm/uaccess.h> |
| 44 | |
| 45 | #include <linux/coda.h> |
| 46 | #include <linux/coda_linux.h> |
| 47 | #include <linux/coda_fs_i.h> |
| 48 | #include <linux/coda_psdev.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
Adrian Bunk | c98d8cf | 2006-03-24 03:15:53 -0800 | [diff] [blame] | 50 | #include "coda_int.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | /* statistics */ |
| 53 | int coda_hard; /* allows signals during upcalls */ |
| 54 | unsigned long coda_timeout = 30; /* .. secs, then signals will dequeue */ |
| 55 | |
| 56 | |
| 57 | struct venus_comm coda_comms[MAX_CODADEVS]; |
gregkh@suse.de | 1db560a | 2005-03-23 10:02:26 -0800 | [diff] [blame] | 58 | static struct class *coda_psdev_class; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
| 60 | /* |
| 61 | * Device operations |
| 62 | */ |
| 63 | |
| 64 | static unsigned int coda_psdev_poll(struct file *file, poll_table * wait) |
| 65 | { |
| 66 | struct venus_comm *vcp = (struct venus_comm *) file->private_data; |
| 67 | unsigned int mask = POLLOUT | POLLWRNORM; |
| 68 | |
| 69 | poll_wait(file, &vcp->vc_waitq, wait); |
Yoshihisa Abe | da47c19 | 2010-10-25 02:03:46 -0400 | [diff] [blame] | 70 | mutex_lock(&vcp->vc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | if (!list_empty(&vcp->vc_pending)) |
| 72 | mask |= POLLIN | POLLRDNORM; |
Yoshihisa Abe | da47c19 | 2010-10-25 02:03:46 -0400 | [diff] [blame] | 73 | mutex_unlock(&vcp->vc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
| 75 | return mask; |
| 76 | } |
| 77 | |
Arnd Bergmann | 9771839 | 2010-04-27 16:24:24 +0200 | [diff] [blame] | 78 | static long coda_psdev_ioctl(struct file * filp, unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | { |
| 80 | unsigned int data; |
| 81 | |
| 82 | switch(cmd) { |
| 83 | case CIOC_KERNEL_VERSION: |
| 84 | data = CODA_KERNEL_VERSION; |
| 85 | return put_user(data, (int __user *) arg); |
| 86 | default: |
| 87 | return -ENOTTY; |
| 88 | } |
| 89 | |
| 90 | return 0; |
| 91 | } |
| 92 | |
| 93 | /* |
| 94 | * Receive a message written by Venus to the psdev |
| 95 | */ |
| 96 | |
| 97 | static ssize_t coda_psdev_write(struct file *file, const char __user *buf, |
| 98 | size_t nbytes, loff_t *off) |
| 99 | { |
| 100 | struct venus_comm *vcp = (struct venus_comm *) file->private_data; |
| 101 | struct upc_req *req = NULL; |
| 102 | struct upc_req *tmp; |
| 103 | struct list_head *lh; |
| 104 | struct coda_in_hdr hdr; |
| 105 | ssize_t retval = 0, count = 0; |
| 106 | int error; |
| 107 | |
| 108 | /* Peek at the opcode, uniquefier */ |
| 109 | if (copy_from_user(&hdr, buf, 2 * sizeof(u_long))) |
| 110 | return -EFAULT; |
| 111 | |
| 112 | if (DOWNCALL(hdr.opcode)) { |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 113 | union outputArgs *dcbuf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | int size = sizeof(*dcbuf); |
| 115 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | if ( nbytes < sizeof(struct coda_out_hdr) ) { |
| 117 | printk("coda_downcall opc %d uniq %d, not enough!\n", |
| 118 | hdr.opcode, hdr.unique); |
| 119 | count = nbytes; |
| 120 | goto out; |
| 121 | } |
| 122 | if ( nbytes > size ) { |
| 123 | printk("Coda: downcall opc %d, uniq %d, too much!", |
| 124 | hdr.opcode, hdr.unique); |
| 125 | nbytes = size; |
| 126 | } |
| 127 | CODA_ALLOC(dcbuf, union outputArgs *, nbytes); |
| 128 | if (copy_from_user(dcbuf, buf, nbytes)) { |
| 129 | CODA_FREE(dcbuf, nbytes); |
| 130 | retval = -EFAULT; |
| 131 | goto out; |
| 132 | } |
| 133 | |
| 134 | /* what downcall errors does Venus handle ? */ |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 135 | error = coda_downcall(vcp, hdr.opcode, dcbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | |
| 137 | CODA_FREE(dcbuf, nbytes); |
| 138 | if (error) { |
| 139 | printk("psdev_write: coda_downcall error: %d\n", error); |
| 140 | retval = error; |
| 141 | goto out; |
| 142 | } |
| 143 | count = nbytes; |
| 144 | goto out; |
| 145 | } |
| 146 | |
| 147 | /* Look for the message on the processing queue. */ |
Yoshihisa Abe | da47c19 | 2010-10-25 02:03:46 -0400 | [diff] [blame] | 148 | mutex_lock(&vcp->vc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | list_for_each(lh, &vcp->vc_processing) { |
| 150 | tmp = list_entry(lh, struct upc_req , uc_chain); |
| 151 | if (tmp->uc_unique == hdr.unique) { |
| 152 | req = tmp; |
| 153 | list_del(&req->uc_chain); |
| 154 | break; |
| 155 | } |
| 156 | } |
Yoshihisa Abe | da47c19 | 2010-10-25 02:03:46 -0400 | [diff] [blame] | 157 | mutex_unlock(&vcp->vc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | |
| 159 | if (!req) { |
| 160 | printk("psdev_write: msg (%d, %d) not found\n", |
| 161 | hdr.opcode, hdr.unique); |
| 162 | retval = -ESRCH; |
| 163 | goto out; |
| 164 | } |
| 165 | |
| 166 | /* move data into response buffer. */ |
| 167 | if (req->uc_outSize < nbytes) { |
| 168 | printk("psdev_write: too much cnt: %d, cnt: %ld, opc: %d, uniq: %d.\n", |
| 169 | req->uc_outSize, (long)nbytes, hdr.opcode, hdr.unique); |
| 170 | nbytes = req->uc_outSize; /* don't have more space! */ |
| 171 | } |
| 172 | if (copy_from_user(req->uc_data, buf, nbytes)) { |
Jens Axboe | 4aeefdc | 2010-08-03 13:22:51 +0200 | [diff] [blame] | 173 | req->uc_flags |= CODA_REQ_ABORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | wake_up(&req->uc_sleep); |
| 175 | retval = -EFAULT; |
| 176 | goto out; |
| 177 | } |
| 178 | |
| 179 | /* adjust outsize. is this useful ?? */ |
Jan Harkes | 112d421 | 2010-09-17 23:26:01 -0400 | [diff] [blame] | 180 | req->uc_outSize = nbytes; |
| 181 | req->uc_flags |= CODA_REQ_WRITE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | count = nbytes; |
| 183 | |
| 184 | /* Convert filedescriptor into a file handle */ |
| 185 | if (req->uc_opcode == CODA_OPEN_BY_FD) { |
| 186 | struct coda_open_by_fd_out *outp = |
| 187 | (struct coda_open_by_fd_out *)req->uc_data; |
Jan Harkes | 38c2e43 | 2007-07-19 01:48:41 -0700 | [diff] [blame] | 188 | if (!outp->oh.result) |
| 189 | outp->fh = fget(outp->fd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | wake_up(&req->uc_sleep); |
| 193 | out: |
| 194 | return(count ? count : retval); |
| 195 | } |
| 196 | |
| 197 | /* |
| 198 | * Read a message from the kernel to Venus |
| 199 | */ |
| 200 | |
| 201 | static ssize_t coda_psdev_read(struct file * file, char __user * buf, |
| 202 | size_t nbytes, loff_t *off) |
| 203 | { |
| 204 | DECLARE_WAITQUEUE(wait, current); |
| 205 | struct venus_comm *vcp = (struct venus_comm *) file->private_data; |
| 206 | struct upc_req *req; |
| 207 | ssize_t retval = 0, count = 0; |
| 208 | |
| 209 | if (nbytes == 0) |
| 210 | return 0; |
| 211 | |
Yoshihisa Abe | da47c19 | 2010-10-25 02:03:46 -0400 | [diff] [blame] | 212 | mutex_lock(&vcp->vc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | |
| 214 | add_wait_queue(&vcp->vc_waitq, &wait); |
| 215 | set_current_state(TASK_INTERRUPTIBLE); |
| 216 | |
| 217 | while (list_empty(&vcp->vc_pending)) { |
| 218 | if (file->f_flags & O_NONBLOCK) { |
| 219 | retval = -EAGAIN; |
| 220 | break; |
| 221 | } |
| 222 | if (signal_pending(current)) { |
| 223 | retval = -ERESTARTSYS; |
| 224 | break; |
| 225 | } |
Yoshihisa Abe | da47c19 | 2010-10-25 02:03:46 -0400 | [diff] [blame] | 226 | mutex_unlock(&vcp->vc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | schedule(); |
Yoshihisa Abe | da47c19 | 2010-10-25 02:03:46 -0400 | [diff] [blame] | 228 | mutex_lock(&vcp->vc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | } |
| 230 | |
| 231 | set_current_state(TASK_RUNNING); |
| 232 | remove_wait_queue(&vcp->vc_waitq, &wait); |
| 233 | |
| 234 | if (retval) |
| 235 | goto out; |
| 236 | |
| 237 | req = list_entry(vcp->vc_pending.next, struct upc_req,uc_chain); |
| 238 | list_del(&req->uc_chain); |
| 239 | |
| 240 | /* Move the input args into userspace */ |
| 241 | count = req->uc_inSize; |
| 242 | if (nbytes < req->uc_inSize) { |
| 243 | printk ("psdev_read: Venus read %ld bytes of %d in message\n", |
| 244 | (long)nbytes, req->uc_inSize); |
| 245 | count = nbytes; |
| 246 | } |
| 247 | |
| 248 | if (copy_to_user(buf, req->uc_data, count)) |
| 249 | retval = -EFAULT; |
| 250 | |
| 251 | /* If request was not a signal, enqueue and don't free */ |
Jens Axboe | 4aeefdc | 2010-08-03 13:22:51 +0200 | [diff] [blame] | 252 | if (!(req->uc_flags & CODA_REQ_ASYNC)) { |
| 253 | req->uc_flags |= CODA_REQ_READ; |
Akinobu Mita | 8e13059 | 2006-06-26 00:24:37 -0700 | [diff] [blame] | 254 | list_add_tail(&(req->uc_chain), &vcp->vc_processing); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | goto out; |
| 256 | } |
| 257 | |
| 258 | CODA_FREE(req->uc_data, sizeof(struct coda_in_hdr)); |
Jan Harkes | 37461e1 | 2007-07-19 01:48:48 -0700 | [diff] [blame] | 259 | kfree(req); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | out: |
Yoshihisa Abe | da47c19 | 2010-10-25 02:03:46 -0400 | [diff] [blame] | 261 | mutex_unlock(&vcp->vc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | return (count ? count : retval); |
| 263 | } |
| 264 | |
| 265 | static int coda_psdev_open(struct inode * inode, struct file * file) |
| 266 | { |
Jan Harkes | 8706551 | 2007-07-19 01:48:45 -0700 | [diff] [blame] | 267 | struct venus_comm *vcp; |
| 268 | int idx, err; |
| 269 | |
| 270 | idx = iminor(inode); |
| 271 | if (idx < 0 || idx >= MAX_CODADEVS) |
| 272 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | |
Jan Harkes | 8706551 | 2007-07-19 01:48:45 -0700 | [diff] [blame] | 274 | err = -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | vcp = &coda_comms[idx]; |
Yoshihisa Abe | da47c19 | 2010-10-25 02:03:46 -0400 | [diff] [blame] | 276 | mutex_lock(&vcp->vc_mutex); |
| 277 | |
Jan Harkes | 8706551 | 2007-07-19 01:48:45 -0700 | [diff] [blame] | 278 | if (!vcp->vc_inuse) { |
| 279 | vcp->vc_inuse++; |
| 280 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | INIT_LIST_HEAD(&vcp->vc_pending); |
| 282 | INIT_LIST_HEAD(&vcp->vc_processing); |
| 283 | init_waitqueue_head(&vcp->vc_waitq); |
| 284 | vcp->vc_sb = NULL; |
| 285 | vcp->vc_seq = 0; |
Jan Harkes | 8706551 | 2007-07-19 01:48:45 -0700 | [diff] [blame] | 286 | |
| 287 | file->private_data = vcp; |
| 288 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | |
Yoshihisa Abe | da47c19 | 2010-10-25 02:03:46 -0400 | [diff] [blame] | 291 | mutex_unlock(&vcp->vc_mutex); |
Jan Harkes | 8706551 | 2007-07-19 01:48:45 -0700 | [diff] [blame] | 292 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | } |
| 294 | |
| 295 | |
| 296 | static int coda_psdev_release(struct inode * inode, struct file * file) |
| 297 | { |
Jan Harkes | 8706551 | 2007-07-19 01:48:45 -0700 | [diff] [blame] | 298 | struct venus_comm *vcp = (struct venus_comm *) file->private_data; |
| 299 | struct upc_req *req, *tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | |
Jan Harkes | 8706551 | 2007-07-19 01:48:45 -0700 | [diff] [blame] | 301 | if (!vcp || !vcp->vc_inuse ) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | printk("psdev_release: Not open.\n"); |
| 303 | return -1; |
| 304 | } |
| 305 | |
Yoshihisa Abe | da47c19 | 2010-10-25 02:03:46 -0400 | [diff] [blame] | 306 | mutex_lock(&vcp->vc_mutex); |
Jan Harkes | 8706551 | 2007-07-19 01:48:45 -0700 | [diff] [blame] | 307 | |
| 308 | /* Wakeup clients so they can return. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | list_for_each_entry_safe(req, tmp, &vcp->vc_pending, uc_chain) { |
Jan Harkes | 8706551 | 2007-07-19 01:48:45 -0700 | [diff] [blame] | 310 | list_del(&req->uc_chain); |
| 311 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | /* Async requests need to be freed here */ |
Jens Axboe | 4aeefdc | 2010-08-03 13:22:51 +0200 | [diff] [blame] | 313 | if (req->uc_flags & CODA_REQ_ASYNC) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | CODA_FREE(req->uc_data, sizeof(struct coda_in_hdr)); |
Jan Harkes | 37461e1 | 2007-07-19 01:48:48 -0700 | [diff] [blame] | 315 | kfree(req); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | continue; |
| 317 | } |
Jens Axboe | 4aeefdc | 2010-08-03 13:22:51 +0200 | [diff] [blame] | 318 | req->uc_flags |= CODA_REQ_ABORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | wake_up(&req->uc_sleep); |
Jan Harkes | 8706551 | 2007-07-19 01:48:45 -0700 | [diff] [blame] | 320 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | |
Jan Harkes | 8706551 | 2007-07-19 01:48:45 -0700 | [diff] [blame] | 322 | list_for_each_entry_safe(req, tmp, &vcp->vc_processing, uc_chain) { |
| 323 | list_del(&req->uc_chain); |
| 324 | |
Jens Axboe | 4aeefdc | 2010-08-03 13:22:51 +0200 | [diff] [blame] | 325 | req->uc_flags |= CODA_REQ_ABORT; |
Jan Harkes | 8706551 | 2007-07-19 01:48:45 -0700 | [diff] [blame] | 326 | wake_up(&req->uc_sleep); |
| 327 | } |
| 328 | |
| 329 | file->private_data = NULL; |
| 330 | vcp->vc_inuse--; |
Yoshihisa Abe | da47c19 | 2010-10-25 02:03:46 -0400 | [diff] [blame] | 331 | mutex_unlock(&vcp->vc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | return 0; |
| 333 | } |
| 334 | |
| 335 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 336 | static const struct file_operations coda_psdev_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | .owner = THIS_MODULE, |
| 338 | .read = coda_psdev_read, |
| 339 | .write = coda_psdev_write, |
| 340 | .poll = coda_psdev_poll, |
Arnd Bergmann | 9771839 | 2010-04-27 16:24:24 +0200 | [diff] [blame] | 341 | .unlocked_ioctl = coda_psdev_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | .open = coda_psdev_open, |
| 343 | .release = coda_psdev_release, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 344 | .llseek = noop_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | }; |
| 346 | |
| 347 | static int init_coda_psdev(void) |
| 348 | { |
| 349 | int i, err = 0; |
| 350 | if (register_chrdev(CODA_PSDEV_MAJOR, "coda", &coda_psdev_fops)) { |
| 351 | printk(KERN_ERR "coda_psdev: unable to get major %d\n", |
| 352 | CODA_PSDEV_MAJOR); |
| 353 | return -EIO; |
| 354 | } |
gregkh@suse.de | 1db560a | 2005-03-23 10:02:26 -0800 | [diff] [blame] | 355 | coda_psdev_class = class_create(THIS_MODULE, "coda"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | if (IS_ERR(coda_psdev_class)) { |
| 357 | err = PTR_ERR(coda_psdev_class); |
| 358 | goto out_chrdev; |
| 359 | } |
Yoshihisa Abe | da47c19 | 2010-10-25 02:03:46 -0400 | [diff] [blame] | 360 | for (i = 0; i < MAX_CODADEVS; i++) { |
| 361 | mutex_init(&(&coda_comms[i])->vc_mutex); |
Greg Kroah-Hartman | a9b1261 | 2008-07-21 20:03:34 -0700 | [diff] [blame] | 362 | device_create(coda_psdev_class, NULL, |
| 363 | MKDEV(CODA_PSDEV_MAJOR, i), NULL, "cfs%d", i); |
Yoshihisa Abe | da47c19 | 2010-10-25 02:03:46 -0400 | [diff] [blame] | 364 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | coda_sysctl_init(); |
| 366 | goto out; |
| 367 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | out_chrdev: |
| 369 | unregister_chrdev(CODA_PSDEV_MAJOR, "coda"); |
| 370 | out: |
| 371 | return err; |
| 372 | } |
| 373 | |
Jan Harkes | 5b7f13b | 2007-07-19 01:48:52 -0700 | [diff] [blame] | 374 | MODULE_AUTHOR("Jan Harkes, Peter J. Braam"); |
| 375 | MODULE_DESCRIPTION("Coda Distributed File System VFS interface"); |
| 376 | MODULE_ALIAS_CHARDEV_MAJOR(CODA_PSDEV_MAJOR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | MODULE_LICENSE("GPL"); |
Jan Harkes | 5b7f13b | 2007-07-19 01:48:52 -0700 | [diff] [blame] | 378 | MODULE_VERSION("6.6"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | static int __init init_coda(void) |
| 381 | { |
| 382 | int status; |
| 383 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | |
| 385 | status = coda_init_inodecache(); |
| 386 | if (status) |
| 387 | goto out2; |
| 388 | status = init_coda_psdev(); |
| 389 | if ( status ) { |
| 390 | printk("Problem (%d) in init_coda_psdev\n", status); |
| 391 | goto out1; |
| 392 | } |
| 393 | |
| 394 | status = register_filesystem(&coda_fs_type); |
| 395 | if (status) { |
| 396 | printk("coda: failed to register filesystem!\n"); |
| 397 | goto out; |
| 398 | } |
| 399 | return 0; |
| 400 | out: |
Greg Kroah-Hartman | 8ab5e4c | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 401 | for (i = 0; i < MAX_CODADEVS; i++) |
Kay Sievers | 62ca879 | 2007-09-25 02:03:03 +0200 | [diff] [blame] | 402 | device_destroy(coda_psdev_class, MKDEV(CODA_PSDEV_MAJOR, i)); |
gregkh@suse.de | 1db560a | 2005-03-23 10:02:26 -0800 | [diff] [blame] | 403 | class_destroy(coda_psdev_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | unregister_chrdev(CODA_PSDEV_MAJOR, "coda"); |
| 405 | coda_sysctl_clean(); |
| 406 | out1: |
| 407 | coda_destroy_inodecache(); |
| 408 | out2: |
| 409 | return status; |
| 410 | } |
| 411 | |
| 412 | static void __exit exit_coda(void) |
| 413 | { |
| 414 | int err, i; |
| 415 | |
| 416 | err = unregister_filesystem(&coda_fs_type); |
| 417 | if ( err != 0 ) { |
| 418 | printk("coda: failed to unregister filesystem\n"); |
| 419 | } |
Greg Kroah-Hartman | 8ab5e4c | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 420 | for (i = 0; i < MAX_CODADEVS; i++) |
Kay Sievers | 62ca879 | 2007-09-25 02:03:03 +0200 | [diff] [blame] | 421 | device_destroy(coda_psdev_class, MKDEV(CODA_PSDEV_MAJOR, i)); |
gregkh@suse.de | 1db560a | 2005-03-23 10:02:26 -0800 | [diff] [blame] | 422 | class_destroy(coda_psdev_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | unregister_chrdev(CODA_PSDEV_MAJOR, "coda"); |
| 424 | coda_sysctl_clean(); |
| 425 | coda_destroy_inodecache(); |
| 426 | } |
| 427 | |
| 428 | module_init(init_coda); |
| 429 | module_exit(exit_coda); |
| 430 | |