[net-next-2.6.git] / fs / coda / psdev.c

/*
 *      	An implementation of a loadable kernel mode driver providing
 *		multiple kernel/user space bidirectional communications links.
 *
 * 		Author: 	Alan Cox <alan@lxorguk.ukuu.org.uk>
 *
 *		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.
 * 
 *              Adapted to become the Linux 2.0 Coda pseudo device
 *              Peter  Braam  <braam@maths.ox.ac.uk> 
 *              Michael Callahan <mjc@emmy.smith.edu>           
 *
 *              Changes for Linux 2.1
 *              Copyright (c) 1997 Carnegie-Mellon University
 */

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/major.h>
#include <linux/time.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/fcntl.h>
#include <linux/delay.h>
#include <linux/skbuff.h>
#include <linux/proc_fs.h>
#include <linux/vmalloc.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/poll.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/smp_lock.h>
#include <linux/device.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/poll.h>
#include <asm/uaccess.h>

#include <linux/coda.h>
#include <linux/coda_linux.h>
#include <linux/coda_fs_i.h>
#include <linux/coda_psdev.h>

#include "coda_int.h"

/* statistics */
int           coda_hard;         /* allows signals during upcalls */
unsigned long coda_timeout = 30; /* .. secs, then signals will dequeue */


struct venus_comm coda_comms[MAX_CODADEVS];
static struct class *coda_psdev_class;

/*
 * Device operations
 */

static unsigned int coda_psdev_poll(struct file *file, poll_table * wait)
{
        struct venus_comm *vcp = (struct venus_comm *) file->private_data;
	unsigned int mask = POLLOUT | POLLWRNORM;

	poll_wait(file, &vcp->vc_waitq, wait);
	if (!list_empty(&vcp->vc_pending))
                mask |= POLLIN | POLLRDNORM;

	return mask;
}

static long coda_psdev_ioctl(struct file * filp, unsigned int cmd, unsigned long arg)
{
	unsigned int data;

	switch(cmd) {
	case CIOC_KERNEL_VERSION:
		data = CODA_KERNEL_VERSION;
		return put_user(data, (int __user *) arg);
	default:
		return -ENOTTY;
	}

	return 0;
}

/*
 *	Receive a message written by Venus to the psdev
 */
 
static ssize_t coda_psdev_write(struct file *file, const char __user *buf, 
				size_t nbytes, loff_t *off)
{
        struct venus_comm *vcp = (struct venus_comm *) file->private_data;
        struct upc_req *req = NULL;
        struct upc_req *tmp;
	struct list_head *lh;
	struct coda_in_hdr hdr;
	ssize_t retval = 0, count = 0;
	int error;

        /* Peek at the opcode, uniquefier */
	if (copy_from_user(&hdr, buf, 2 * sizeof(u_long)))
	        return -EFAULT;

        if (DOWNCALL(hdr.opcode)) {
		struct super_block *sb = NULL;
                union outputArgs *dcbuf;
		int size = sizeof(*dcbuf);

		sb = vcp->vc_sb;
		if ( !sb ) {
                        count = nbytes;
                        goto out;
		}

		if  ( nbytes < sizeof(struct coda_out_hdr) ) {
		        printk("coda_downcall opc %d uniq %d, not enough!\n",
			       hdr.opcode, hdr.unique);
			count = nbytes;
			goto out;
		}
		if ( nbytes > size ) {
		        printk("Coda: downcall opc %d, uniq %d, too much!",
			       hdr.opcode, hdr.unique);
		        nbytes = size;
		}
		CODA_ALLOC(dcbuf, union outputArgs *, nbytes);
		if (copy_from_user(dcbuf, buf, nbytes)) {
			CODA_FREE(dcbuf, nbytes);
			retval = -EFAULT;
			goto out;
		}

		/* what downcall errors does Venus handle ? */
		lock_kernel();
		error = coda_downcall(hdr.opcode, dcbuf, sb);
		unlock_kernel();

		CODA_FREE(dcbuf, nbytes);
		if (error) {
		        printk("psdev_write: coda_downcall error: %d\n", error);
			retval = error;
			goto out;
		}
		count = nbytes;
		goto out;
	}
        
	/* Look for the message on the processing queue. */
	lock_kernel();
	list_for_each(lh, &vcp->vc_processing) {
		tmp = list_entry(lh, struct upc_req , uc_chain);
		if (tmp->uc_unique == hdr.unique) {
			req = tmp;
			list_del(&req->uc_chain);
			break;
		}
	}
	unlock_kernel();

	if (!req) {
		printk("psdev_write: msg (%d, %d) not found\n", 
			hdr.opcode, hdr.unique);
		retval = -ESRCH;
		goto out;
	}

        /* move data into response buffer. */
	if (req->uc_outSize < nbytes) {
                printk("psdev_write: too much cnt: %d, cnt: %ld, opc: %d, uniq: %d.\n",
		       req->uc_outSize, (long)nbytes, hdr.opcode, hdr.unique);
		nbytes = req->uc_outSize; /* don't have more space! */
	}
        if (copy_from_user(req->uc_data, buf, nbytes)) {
		req->uc_flags |= CODA_REQ_ABORT;
		wake_up(&req->uc_sleep);
		retval = -EFAULT;
		goto out;
	}

	/* adjust outsize. is this useful ?? */
        req->uc_outSize = nbytes;	
        req->uc_flags |= REQ_WRITE;
	count = nbytes;

	/* Convert filedescriptor into a file handle */
	if (req->uc_opcode == CODA_OPEN_BY_FD) {
		struct coda_open_by_fd_out *outp =
			(struct coda_open_by_fd_out *)req->uc_data;
		if (!outp->oh.result)
			outp->fh = fget(outp->fd);
	}

        wake_up(&req->uc_sleep);
out:
        return(count ? count : retval);  
}

/*
 *	Read a message from the kernel to Venus
 */

static ssize_t coda_psdev_read(struct file * file, char __user * buf, 
			       size_t nbytes, loff_t *off)
{
	DECLARE_WAITQUEUE(wait, current);
        struct venus_comm *vcp = (struct venus_comm *) file->private_data;
        struct upc_req *req;
	ssize_t retval = 0, count = 0;

	if (nbytes == 0)
		return 0;

	lock_kernel();

	add_wait_queue(&vcp->vc_waitq, &wait);
	set_current_state(TASK_INTERRUPTIBLE);

	while (list_empty(&vcp->vc_pending)) {
		if (file->f_flags & O_NONBLOCK) {
			retval = -EAGAIN;
			break;
		}
		if (signal_pending(current)) {
			retval = -ERESTARTSYS;
			break;
		}
		schedule();
	}

	set_current_state(TASK_RUNNING);
	remove_wait_queue(&vcp->vc_waitq, &wait);

	if (retval)
		goto out;

	req = list_entry(vcp->vc_pending.next, struct upc_req,uc_chain);
	list_del(&req->uc_chain);

	/* Move the input args into userspace */
	count = req->uc_inSize;
	if (nbytes < req->uc_inSize) {
                printk ("psdev_read: Venus read %ld bytes of %d in message\n",
			(long)nbytes, req->uc_inSize);
		count = nbytes;
        }

	if (copy_to_user(buf, req->uc_data, count))
	        retval = -EFAULT;
        
	/* If request was not a signal, enqueue and don't free */
	if (!(req->uc_flags & CODA_REQ_ASYNC)) {
		req->uc_flags |= CODA_REQ_READ;
		list_add_tail(&(req->uc_chain), &vcp->vc_processing);
		goto out;
	}

	CODA_FREE(req->uc_data, sizeof(struct coda_in_hdr));
	kfree(req);
out:
	unlock_kernel();
	return (count ? count : retval);
}

static int coda_psdev_open(struct inode * inode, struct file * file)
{
	struct venus_comm *vcp;
	int idx, err;

	idx = iminor(inode);
	if (idx < 0 || idx >= MAX_CODADEVS)
		return -ENODEV;

	lock_kernel();

	err = -EBUSY;
	vcp = &coda_comms[idx];
	if (!vcp->vc_inuse) {
		vcp->vc_inuse++;

		INIT_LIST_HEAD(&vcp->vc_pending);
		INIT_LIST_HEAD(&vcp->vc_processing);
		init_waitqueue_head(&vcp->vc_waitq);
		vcp->vc_sb = NULL;
		vcp->vc_seq = 0;

		file->private_data = vcp;
		err = 0;
	}

	unlock_kernel();
	return err;
}


static int coda_psdev_release(struct inode * inode, struct file * file)
{
	struct venus_comm *vcp = (struct venus_comm *) file->private_data;
	struct upc_req *req, *tmp;

	if (!vcp || !vcp->vc_inuse ) {
		printk("psdev_release: Not open.\n");
		return -1;
	}

	lock_kernel();

	/* Wakeup clients so they can return. */
	list_for_each_entry_safe(req, tmp, &vcp->vc_pending, uc_chain) {
		list_del(&req->uc_chain);

		/* Async requests need to be freed here */
		if (req->uc_flags & CODA_REQ_ASYNC) {
			CODA_FREE(req->uc_data, sizeof(struct coda_in_hdr));
			kfree(req);
			continue;
		}
		req->uc_flags |= CODA_REQ_ABORT;
		wake_up(&req->uc_sleep);
	}

	list_for_each_entry_safe(req, tmp, &vcp->vc_processing, uc_chain) {
		list_del(&req->uc_chain);

		req->uc_flags |= CODA_REQ_ABORT;
		wake_up(&req->uc_sleep);
	}

	file->private_data = NULL;
	vcp->vc_inuse--;
	unlock_kernel();
	return 0;
}


static const struct file_operations coda_psdev_fops = {
	.owner		= THIS_MODULE,
	.read		= coda_psdev_read,
	.write		= coda_psdev_write,
	.poll		= coda_psdev_poll,
	.unlocked_ioctl	= coda_psdev_ioctl,
	.open		= coda_psdev_open,
	.release	= coda_psdev_release,
};

static int init_coda_psdev(void)
{
	int i, err = 0;
	if (register_chrdev(CODA_PSDEV_MAJOR, "coda", &coda_psdev_fops)) {
              printk(KERN_ERR "coda_psdev: unable to get major %d\n", 
		     CODA_PSDEV_MAJOR);
              return -EIO;
	}
	coda_psdev_class = class_create(THIS_MODULE, "coda");
	if (IS_ERR(coda_psdev_class)) {
		err = PTR_ERR(coda_psdev_class);
		goto out_chrdev;
	}		
	for (i = 0; i < MAX_CODADEVS; i++)
		device_create(coda_psdev_class, NULL,
			      MKDEV(CODA_PSDEV_MAJOR, i), NULL, "cfs%d", i);
	coda_sysctl_init();
	goto out;

out_chrdev:
	unregister_chrdev(CODA_PSDEV_MAJOR, "coda");
out:
	return err;
}

MODULE_AUTHOR("Jan Harkes, Peter J. Braam");
MODULE_DESCRIPTION("Coda Distributed File System VFS interface");
MODULE_ALIAS_CHARDEV_MAJOR(CODA_PSDEV_MAJOR);
MODULE_LICENSE("GPL");
MODULE_VERSION("6.6");

static int __init init_coda(void)
{
	int status;
	int i;

	status = coda_init_inodecache();
	if (status)
		goto out2;
	status = init_coda_psdev();
	if ( status ) {
		printk("Problem (%d) in init_coda_psdev\n", status);
		goto out1;
	}
	
	status = register_filesystem(&coda_fs_type);
	if (status) {
		printk("coda: failed to register filesystem!\n");
		goto out;
	}
	return 0;
out:
	for (i = 0; i < MAX_CODADEVS; i++)
		device_destroy(coda_psdev_class, MKDEV(CODA_PSDEV_MAJOR, i));
	class_destroy(coda_psdev_class);
	unregister_chrdev(CODA_PSDEV_MAJOR, "coda");
	coda_sysctl_clean();
out1:
	coda_destroy_inodecache();
out2:
	return status;
}

static void __exit exit_coda(void)
{
        int err, i;

	err = unregister_filesystem(&coda_fs_type);
        if ( err != 0 ) {
                printk("coda: failed to unregister filesystem\n");
        }
	for (i = 0; i < MAX_CODADEVS; i++)
		device_destroy(coda_psdev_class, MKDEV(CODA_PSDEV_MAJOR, i));
	class_destroy(coda_psdev_class);
	unregister_chrdev(CODA_PSDEV_MAJOR, "coda");
	coda_sysctl_clean();
	coda_destroy_inodecache();
}

module_init(init_coda);
module_exit(exit_coda);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* An implementation of a loadable kernel mode driver providing
	3	* multiple kernel/user space bidirectional communications links.
	4	*
526719ba	5	* Author: Alan Cox <alan@lxorguk.ukuu.org.uk>
1da177e4 LT	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>
a99bbaf5	25	#include <linux/sched.h>
1da177e4 LT	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>
1da177e4 LT	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>
	38	#include <linux/smp_lock.h>
	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>
1da177e4	49
c98d8cfb	50	#include "coda_int.h"
1da177e4	51
1da177e4 LT	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];
1db560af	58	static struct class *coda_psdev_class;
1da177e4 LT	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);
	70	if (!list_empty(&vcp->vc_pending))
	71	mask \|= POLLIN \| POLLRDNORM;
	72
	73	return mask;
	74	}
	75
97718390	76	static long coda_psdev_ioctl(struct file * filp, unsigned int cmd, unsigned long arg)
1da177e4 LT	77	{
	78	unsigned int data;
	79
	80	switch(cmd) {
	81	case CIOC_KERNEL_VERSION:
	82	data = CODA_KERNEL_VERSION;
	83	return put_user(data, (int __user *) arg);
	84	default:
	85	return -ENOTTY;
	86	}
	87
	88	return 0;
	89	}
	90
	91	/*
	92	* Receive a message written by Venus to the psdev
	93	*/
	94
	95	static ssize_t coda_psdev_write(struct file file, const char __user buf,
	96	size_t nbytes, loff_t *off)
	97	{
	98	struct venus_comm vcp = (struct venus_comm ) file->private_data;
	99	struct upc_req *req = NULL;
	100	struct upc_req *tmp;
	101	struct list_head *lh;
	102	struct coda_in_hdr hdr;
	103	ssize_t retval = 0, count = 0;
	104	int error;
	105
	106	/* Peek at the opcode, uniquefier */
	107	if (copy_from_user(&hdr, buf, 2 * sizeof(u_long)))
	108	return -EFAULT;
	109
	110	if (DOWNCALL(hdr.opcode)) {
	111	struct super_block *sb = NULL;
	112	union outputArgs *dcbuf;
	113	int size = sizeof(*dcbuf);
	114
	115	sb = vcp->vc_sb;
	116	if ( !sb ) {
	117	count = nbytes;
	118	goto out;
	119	}
	120
	121	if ( nbytes < sizeof(struct coda_out_hdr) ) {
	122	printk("coda_downcall opc %d uniq %d, not enough!\n",
	123	hdr.opcode, hdr.unique);
	124	count = nbytes;
	125	goto out;
	126	}
	127	if ( nbytes > size ) {
	128	printk("Coda: downcall opc %d, uniq %d, too much!",
	129	hdr.opcode, hdr.unique);
	130	nbytes = size;
	131	}
	132	CODA_ALLOC(dcbuf, union outputArgs *, nbytes);
	133	if (copy_from_user(dcbuf, buf, nbytes)) {
	134	CODA_FREE(dcbuf, nbytes);
	135	retval = -EFAULT;
	136	goto out;
	137	}
	138
	139	/* what downcall errors does Venus handle ? */
	140	lock_kernel();
141	error = coda_downcall(hdr.opcode, dcbuf, sb);
142	unlock_kernel();
143
144	CODA_FREE(dcbuf, nbytes);
145	if (error) {
146	printk("psdev_write: coda_downcall error: %d\n", error);
147	retval = error;
148	goto out;
149	}
150	count = nbytes;
151	goto out;
152	}
153
154	/* Look for the message on the processing queue. */
155	lock_kernel();
156	list_for_each(lh, &vcp->vc_processing) {
157	tmp = list_entry(lh, struct upc_req , uc_chain);
158	if (tmp->uc_unique == hdr.unique) {
159	req = tmp;
160	list_del(&req->uc_chain);
161	break;
162	}
163	}
164	unlock_kernel();
165
166	if (!req) {
167	printk("psdev_write: msg (%d, %d) not found\n",
168	hdr.opcode, hdr.unique);
169	retval = -ESRCH;
170	goto out;
171	}
172
173	/* move data into response buffer. */
174	if (req->uc_outSize < nbytes) {
175	printk("psdev_write: too much cnt: %d, cnt: %ld, opc: %d, uniq: %d.\n",
176	req->uc_outSize, (long)nbytes, hdr.opcode, hdr.unique);
177	nbytes = req->uc_outSize; /* don't have more space! */
178	}
179	if (copy_from_user(req->uc_data, buf, nbytes)) {
4aeefdc6	180	req->uc_flags \|= CODA_REQ_ABORT;
1da177e4 LT	181	wake_up(&req->uc_sleep);
	182	retval = -EFAULT;
	183	goto out;
	184	}
	185
	186	/* adjust outsize. is this useful ?? */
	187	req->uc_outSize = nbytes;
	188	req->uc_flags \|= REQ_WRITE;
	189	count = nbytes;
	190
	191	/* Convert filedescriptor into a file handle */
	192	if (req->uc_opcode == CODA_OPEN_BY_FD) {
	193	struct coda_open_by_fd_out *outp =
	194	(struct coda_open_by_fd_out *)req->uc_data;
38c2e437 JH	195	if (!outp->oh.result)
38c2e437 JH	196	outp->fh = fget(outp->fd);
1da177e4 LT	197	}
	198
	199	wake_up(&req->uc_sleep);
	200	out:
	201	return(count ? count : retval);
	202	}
	203
	204	/*
	205	* Read a message from the kernel to Venus
	206	*/
	207
	208	static ssize_t coda_psdev_read(struct file * file, char __user * buf,
	209	size_t nbytes, loff_t *off)
	210	{
	211	DECLARE_WAITQUEUE(wait, current);
	212	struct venus_comm vcp = (struct venus_comm ) file->private_data;
	213	struct upc_req *req;
	214	ssize_t retval = 0, count = 0;
	215
	216	if (nbytes == 0)
	217	return 0;
	218
	219	lock_kernel();
	220
	221	add_wait_queue(&vcp->vc_waitq, &wait);
	222	set_current_state(TASK_INTERRUPTIBLE);
	223
	224	while (list_empty(&vcp->vc_pending)) {
	225	if (file->f_flags & O_NONBLOCK) {
	226	retval = -EAGAIN;
	227	break;
	228	}
	229	if (signal_pending(current)) {
	230	retval = -ERESTARTSYS;
	231	break;
	232	}
	233	schedule();
	234	}
	235
	236	set_current_state(TASK_RUNNING);
	237	remove_wait_queue(&vcp->vc_waitq, &wait);
	238
	239	if (retval)
	240	goto out;
	241
	242	req = list_entry(vcp->vc_pending.next, struct upc_req,uc_chain);
	243	list_del(&req->uc_chain);
	244
	245	/* Move the input args into userspace */
	246	count = req->uc_inSize;
	247	if (nbytes < req->uc_inSize) {
	248	printk ("psdev_read: Venus read %ld bytes of %d in message\n",
	249	(long)nbytes, req->uc_inSize);
	250	count = nbytes;
	251	}
	252
	253	if (copy_to_user(buf, req->uc_data, count))
	254	retval = -EFAULT;
	255
	256	/* If request was not a signal, enqueue and don't free */
4aeefdc6 JA	257	if (!(req->uc_flags & CODA_REQ_ASYNC)) {
4aeefdc6 JA	258	req->uc_flags \|= CODA_REQ_READ;
8e13059a	259	list_add_tail(&(req->uc_chain), &vcp->vc_processing);
1da177e4 LT	260	goto out;
	261	}
	262
	263	CODA_FREE(req->uc_data, sizeof(struct coda_in_hdr));
37461e19	264	kfree(req);
1da177e4 LT	265	out:
	266	unlock_kernel();
	267	return (count ? count : retval);
	268	}
	269
	270	static int coda_psdev_open(struct inode * inode, struct file * file)
	271	{
87065519 JH	272	struct venus_comm *vcp;
87065519 JH	273	int idx, err;
1da177e4	274
1da177e4	275	idx = iminor(inode);
87065519	276	if (idx < 0 \|\| idx >= MAX_CODADEVS)
1da177e4	277	return -ENODEV;
1da177e4	278
87065519 JH	279	lock_kernel();
	280
	281	err = -EBUSY;
1da177e4	282	vcp = &coda_comms[idx];
87065519 JH	283	if (!vcp->vc_inuse) {
	284	vcp->vc_inuse++;
	285
1da177e4 LT	286	INIT_LIST_HEAD(&vcp->vc_pending);
	287	INIT_LIST_HEAD(&vcp->vc_processing);
	288	init_waitqueue_head(&vcp->vc_waitq);
	289	vcp->vc_sb = NULL;
	290	vcp->vc_seq = 0;
87065519 JH	291
	292	file->private_data = vcp;
	293	err = 0;
1da177e4	294	}
1da177e4 LT	295
1da177e4 LT	296	unlock_kernel();
87065519	297	return err;
1da177e4 LT	298	}
	299
	300
	301	static int coda_psdev_release(struct inode * inode, struct file * file)
	302	{
87065519 JH	303	struct venus_comm vcp = (struct venus_comm ) file->private_data;
87065519 JH	304	struct upc_req req, tmp;
1da177e4	305
87065519	306	if (!vcp \|\| !vcp->vc_inuse ) {
1da177e4 LT	307	printk("psdev_release: Not open.\n");
	308	return -1;
	309	}
	310
87065519 JH	311	lock_kernel();
	312
	313	/* Wakeup clients so they can return. */
1da177e4	314	list_for_each_entry_safe(req, tmp, &vcp->vc_pending, uc_chain) {
87065519 JH	315	list_del(&req->uc_chain);
87065519 JH	316
1da177e4	317	/* Async requests need to be freed here */
4aeefdc6	318	if (req->uc_flags & CODA_REQ_ASYNC) {
1da177e4	319	CODA_FREE(req->uc_data, sizeof(struct coda_in_hdr));
37461e19	320	kfree(req);
1da177e4 LT	321	continue;
1da177e4 LT	322	}
4aeefdc6	323	req->uc_flags \|= CODA_REQ_ABORT;
1da177e4	324	wake_up(&req->uc_sleep);
87065519 JH	325	}
	326
	327	list_for_each_entry_safe(req, tmp, &vcp->vc_processing, uc_chain) {
	328	list_del(&req->uc_chain);
	329
4aeefdc6	330	req->uc_flags \|= CODA_REQ_ABORT;
87065519 JH	331	wake_up(&req->uc_sleep);
87065519 JH	332	}
1da177e4	333
87065519 JH	334	file->private_data = NULL;
87065519 JH	335	vcp->vc_inuse--;
1da177e4 LT	336	unlock_kernel();
	337	return 0;
	338	}
	339
	340
4b6f5d20	341	static const struct file_operations coda_psdev_fops = {
1da177e4 LT	342	.owner = THIS_MODULE,
	343	.read = coda_psdev_read,
	344	.write = coda_psdev_write,
	345	.poll = coda_psdev_poll,
97718390	346	.unlocked_ioctl = coda_psdev_ioctl,
1da177e4 LT	347	.open = coda_psdev_open,
	348	.release = coda_psdev_release,
	349	};
	350
	351	static int init_coda_psdev(void)
	352	{
	353	int i, err = 0;
	354	if (register_chrdev(CODA_PSDEV_MAJOR, "coda", &coda_psdev_fops)) {
	355	printk(KERN_ERR "coda_psdev: unable to get major %d\n",
	356	CODA_PSDEV_MAJOR);
	357	return -EIO;
	358	}
1db560af	359	coda_psdev_class = class_create(THIS_MODULE, "coda");
1da177e4 LT	360	if (IS_ERR(coda_psdev_class)) {
	361	err = PTR_ERR(coda_psdev_class);
	362	goto out_chrdev;
	363	}
7c69ef79	364	for (i = 0; i < MAX_CODADEVS; i++)
a9b12619 GKH	365	device_create(coda_psdev_class, NULL,
a9b12619 GKH	366	MKDEV(CODA_PSDEV_MAJOR, i), NULL, "cfs%d", i);
1da177e4 LT	367	coda_sysctl_init();
	368	goto out;
	369
1da177e4 LT	370	out_chrdev:
	371	unregister_chrdev(CODA_PSDEV_MAJOR, "coda");
	372	out:
	373	return err;
	374	}
	375
5b7f13bd JH	376	MODULE_AUTHOR("Jan Harkes, Peter J. Braam");
	377	MODULE_DESCRIPTION("Coda Distributed File System VFS interface");
	378	MODULE_ALIAS_CHARDEV_MAJOR(CODA_PSDEV_MAJOR);
1da177e4	379	MODULE_LICENSE("GPL");
5b7f13bd	380	MODULE_VERSION("6.6");
1da177e4	381
1da177e4 LT	382	static int __init init_coda(void)
	383	{
	384	int status;
	385	int i;
1da177e4 LT	386
	387	status = coda_init_inodecache();
	388	if (status)
	389	goto out2;
	390	status = init_coda_psdev();
	391	if ( status ) {
	392	printk("Problem (%d) in init_coda_psdev\n", status);
	393	goto out1;
	394	}
	395
	396	status = register_filesystem(&coda_fs_type);
	397	if (status) {
	398	printk("coda: failed to register filesystem!\n");
	399	goto out;
	400	}
	401	return 0;
	402	out:
8ab5e4c1	403	for (i = 0; i < MAX_CODADEVS; i++)
62ca8792	404	device_destroy(coda_psdev_class, MKDEV(CODA_PSDEV_MAJOR, i));
1db560af	405	class_destroy(coda_psdev_class);
1da177e4 LT	406	unregister_chrdev(CODA_PSDEV_MAJOR, "coda");
	407	coda_sysctl_clean();
	408	out1:
	409	coda_destroy_inodecache();
	410	out2:
	411	return status;
	412	}
	413
	414	static void __exit exit_coda(void)
	415	{
	416	int err, i;
	417
	418	err = unregister_filesystem(&coda_fs_type);
	419	if ( err != 0 ) {
	420	printk("coda: failed to unregister filesystem\n");
	421	}
8ab5e4c1	422	for (i = 0; i < MAX_CODADEVS; i++)
62ca8792	423	device_destroy(coda_psdev_class, MKDEV(CODA_PSDEV_MAJOR, i));
1db560af	424	class_destroy(coda_psdev_class);
1da177e4 LT	425	unregister_chrdev(CODA_PSDEV_MAJOR, "coda");
	426	coda_sysctl_clean();
	427	coda_destroy_inodecache();
	428	}
	429
	430	module_init(init_coda);
	431	module_exit(exit_coda);
	432