WebSVN - shark - Blame - Rev 1618 - /shark/branches/xen/drivers/usb/core/unused/inode.c

Rev	Author	Line No.	Line
846	giacomo	1	/*****************************************************************************/
		2
		3	/*
		4	* inode.c -- Inode/Dentry functions for the USB device file system.
		5	*
		6	* Copyright (C) 2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
		7	* Copyright (C) 2001,2002 Greg Kroah-Hartman (greg@kroah.com)
		8	*
		9	* This program is free software; you can redistribute it and/or modify
		10	* it under the terms of the GNU General Public License as published by
		11	* the Free Software Foundation; either version 2 of the License, or
		12	* (at your option) any later version.
		13	*
		14	* This program is distributed in the hope that it will be useful,
		15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
		16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		17	* GNU General Public License for more details.
		18	*
		19	* You should have received a copy of the GNU General Public License
		20	* along with this program; if not, write to the Free Software
		21	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
		22	*
		23	* History:
		24	* 0.1 04.01.2000 Created
		25	* 0.2 10.12.2001 converted to use the vfs layer better
		26	*/
		27
		28	/*****************************************************************************/
		29
		30	#include <linux/config.h>
		31	#include <linux/module.h>
		32	#include <linux/fs.h>
		33	#include <linux/mount.h>
		34	#include <linux/pagemap.h>
		35	#include <linux/init.h>
		36	#include <linux/proc_fs.h>
		37	#include <linux/usb.h>
		38	#include <linux/namei.h>
		39	#include <linux/usbdevice_fs.h>
		40	#include <linux/smp_lock.h>
		41	#include <linux/parser.h>
		42	#include <asm/byteorder.h>
		43
		44	static struct super_operations usbfs_ops;
		45	static struct file_operations default_file_operations;
		46	static struct inode_operations usbfs_dir_inode_operations;
		47	static struct vfsmount *usbdevfs_mount;
		48	static struct vfsmount *usbfs_mount;
		49	static int usbdevfs_mount_count; /* = 0 */
		50	static int usbfs_mount_count; /* = 0 */
		51
		52	static struct dentry *devices_usbdevfs_dentry;
		53	static struct dentry *devices_usbfs_dentry;
		54	static int num_buses; /* = 0 */
		55
		56	static uid_t devuid; /* = 0 */
		57	static uid_t busuid; /* = 0 */
		58	static uid_t listuid; /* = 0 */
		59	static gid_t devgid; /* = 0 */
		60	static gid_t busgid; /* = 0 */
		61	static gid_t listgid; /* = 0 */
		62	static umode_t devmode = S_IWUSR \| S_IRUGO;
		63	static umode_t busmode = S_IXUGO \| S_IRUGO;
		64	static umode_t listmode = S_IRUGO;
		65
		66	enum {
		67	Opt_devuid, Opt_devgid, Opt_devmode,
		68	Opt_busuid, Opt_busgid, Opt_busmode,
		69	Opt_listuid, Opt_listgid, Opt_listmode,
		70	Opt_err,
		71	};
		72
		73	static match_table_t tokens = {
		74	{Opt_devuid, "devuid=%u"},
		75	{Opt_devgid, "devgid=%u"},
		76	{Opt_devmode, "devmode=%o"},
		77	{Opt_busuid, "busuid=%u"},
		78	{Opt_busgid, "busgid=%u"},
		79	{Opt_busmode, "busmode=%o"},
		80	{Opt_listuid, "listuid=%u"},
		81	{Opt_listgid, "listgid=%u"},
		82	{Opt_listmode, "listmode=%o"},
		83	{Opt_err, NULL}
		84	};
		85
		86	static int parse_options(struct super_block s, char data)
		87	{
		88	char *p;
		89	int option;
		90
		91	while ((p = strsep(&data, ",")) != NULL) {
		92	substring_t args[MAX_OPT_ARGS];
		93	int token;
		94	if (!*p)
		95	continue;
		96
		97	token = match_token(p, tokens, args);
		98	switch (token) {
		99	case Opt_devuid:
		100	if (match_int(&args[0], &option))
		101	return -EINVAL;
		102	devuid = option;
		103	break;
		104	case Opt_devgid:
		105	if (match_int(&args[0], &option))
		106	return -EINVAL;
		107	devgid = option;
		108	break;
		109	case Opt_devmode:
		110	if (match_octal(&args[0], &option))
		111	return -EINVAL;
		112	devmode = option & S_IRWXUGO;
		113	break;
		114	case Opt_busuid:
		115	if (match_int(&args[0], &option))
		116	return -EINVAL;
		117	busuid = option;
		118	break;
		119	case Opt_busgid:
		120	if (match_int(&args[0], &option))
		121	return -EINVAL;
		122	busgid = option;
		123	break;
		124	case Opt_busmode:
		125	if (match_octal(&args[0], &option))
		126	return -EINVAL;
		127	busmode = option & S_IRWXUGO;
		128	break;
		129	case Opt_listuid:
		130	if (match_int(&args[0], &option))
		131	return -EINVAL;
		132	listuid = option;
		133	break;
		134	case Opt_listgid:
		135	if (match_int(&args[0], &option))
		136	return -EINVAL;
		137	listgid = option;
		138	break;
		139	case Opt_listmode:
		140	if (match_octal(&args[0], &option))
		141	return -EINVAL;
		142	listmode = option & S_IRWXUGO;
		143	break;
		144	default:
		145	err("usbfs: unrecognised mount option \"%s\" "
		146	"or missing value\n", p);
		147	return -EINVAL;
		148	}
		149	}
		150
		151	return 0;
		152	}
		153
		154	static struct inode usbfs_get_inode (struct super_block sb, int mode, dev_t dev)
		155	{
		156	struct inode *inode = new_inode(sb);
		157
		158	if (inode) {
		159	inode->i_mode = mode;
		160	inode->i_uid = current->fsuid;
		161	inode->i_gid = current->fsgid;
		162	inode->i_blksize = PAGE_CACHE_SIZE;
		163	inode->i_blocks = 0;
		164	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
		165	switch (mode & S_IFMT) {
		166	default:
		167	init_special_inode(inode, mode, dev);
		168	break;
		169	case S_IFREG:
		170	inode->i_fop = &default_file_operations;
		171	break;
		172	case S_IFDIR:
		173	inode->i_op = &usbfs_dir_inode_operations;
		174	inode->i_fop = &simple_dir_operations;
		175
		176	/* directory inodes start off with i_nlink == 2 (for "." entry) */
		177	inode->i_nlink++;
		178	break;
		179	}
		180	}
		181	return inode;
		182	}
		183
		184	/* SMP-safe */
		185	static int usbfs_mknod (struct inode dir, struct dentry dentry, int mode,
		186	dev_t dev)
		187	{
		188	struct inode *inode = usbfs_get_inode(dir->i_sb, mode, dev);
		189	int error = -EPERM;
		190
		191	if (dentry->d_inode)
		192	return -EEXIST;
		193
		194	if (inode) {
		195	d_instantiate(dentry, inode);
		196	dget(dentry);
		197	error = 0;
		198	}
		199	return error;
		200	}
		201
		202	static int usbfs_mkdir (struct inode dir, struct dentry dentry, int mode)
		203	{
		204	int res;
		205
		206	mode = (mode & (S_IRWXUGO \| S_ISVTX)) \| S_IFDIR;
		207	res = usbfs_mknod (dir, dentry, mode, 0);
		208	if (!res)
		209	dir->i_nlink++;
		210	return res;
		211	}
		212
		213	static int usbfs_create (struct inode dir, struct dentry dentry, int mode)
		214	{
		215	mode = (mode & S_IALLUGO) \| S_IFREG;
		216	return usbfs_mknod (dir, dentry, mode, 0);
		217	}
		218
		219	static inline int usbfs_positive (struct dentry *dentry)
		220	{
		221	return dentry->d_inode && !d_unhashed(dentry);
		222	}
		223
		224	static int usbfs_empty (struct dentry *dentry)
		225	{
		226	struct list_head *list;
		227
		228	spin_lock(&dcache_lock);
		229
		230	list_for_each(list, &dentry->d_subdirs) {
		231	struct dentry *de = list_entry(list, struct dentry, d_child);
		232	if (usbfs_positive(de)) {
		233	spin_unlock(&dcache_lock);
		234	return 0;
		235	}
		236	}
		237
		238	spin_unlock(&dcache_lock);
		239	return 1;
		240	}
		241
		242	static int usbfs_unlink (struct inode dir, struct dentry dentry)
		243	{
		244	struct inode *inode = dentry->d_inode;
		245	down(&inode->i_sem);
		246	dentry->d_inode->i_nlink--;
		247	dput(dentry);
		248	up(&inode->i_sem);
		249	d_delete(dentry);
		250	return 0;
		251	}
		252
		253	static void d_unhash(struct dentry *dentry)
		254	{
		255	dget(dentry);
		256	spin_lock(&dcache_lock);
		257	switch (atomic_read(&dentry->d_count)) {
		258	default:
		259	spin_unlock(&dcache_lock);
		260	shrink_dcache_parent(dentry);
		261	spin_lock(&dcache_lock);
		262	if (atomic_read(&dentry->d_count) != 2)
		263	break;
		264	case 2:
		265	__d_drop(dentry);
		266	}
		267	spin_unlock(&dcache_lock);
		268	}
		269
		270	static int usbfs_rmdir(struct inode dir, struct dentry dentry)
		271	{
		272	int error = -ENOTEMPTY;
		273	struct inode * inode = dentry->d_inode;
		274
		275	down(&inode->i_sem);
		276	d_unhash(dentry);
		277	if (usbfs_empty(dentry)) {
		278	dentry->d_inode->i_nlink -= 2;
		279	dput(dentry);
		280	inode->i_flags \|= S_DEAD;
		281	dir->i_nlink--;
		282	error = 0;
		283	}
		284	up(&inode->i_sem);
		285	if (!error)
		286	d_delete(dentry);
		287	dput(dentry);
		288	return error;
		289	}
		290
		291
		292	/* default file operations */
		293	static ssize_t default_read_file (struct file file, char __user buf,
		294	size_t count, loff_t *ppos)
		295	{
		296	return 0;
		297	}
		298
		299	static ssize_t default_write_file (struct file file, const char __user buf,
		300	size_t count, loff_t *ppos)
		301	{
		302	return count;
		303	}
		304
		305	static loff_t default_file_lseek (struct file *file, loff_t offset, int orig)
		306	{
		307	loff_t retval = -EINVAL;
		308
		309	down(&file->f_dentry->d_inode->i_sem);
		310	switch(orig) {
		311	case 0:
		312	if (offset > 0) {
		313	file->f_pos = offset;
		314	retval = file->f_pos;
		315	}
		316	break;
		317	case 1:
		318	if ((offset + file->f_pos) > 0) {
		319	file->f_pos += offset;
		320	retval = file->f_pos;
		321	}
		322	break;
		323	default:
		324	break;
		325	}
		326	up(&file->f_dentry->d_inode->i_sem);
		327	return retval;
		328	}
		329
		330	static int default_open (struct inode inode, struct file file)
		331	{
		332	if (inode->u.generic_ip)
		333	file->private_data = inode->u.generic_ip;
		334
		335	return 0;
		336	}
		337
		338	static struct file_operations default_file_operations = {
		339	.read = default_read_file,
		340	.write = default_write_file,
		341	.open = default_open,
		342	.llseek = default_file_lseek,
		343	};
		344
		345	static struct inode_operations usbfs_dir_inode_operations = {
		346	.lookup = simple_lookup,
		347	};
		348
		349	static struct super_operations usbfs_ops = {
		350	.statfs = simple_statfs,
		351	.drop_inode = generic_delete_inode,
		352	};
		353
		354	static int usbfs_fill_super(struct super_block sb, void data, int silent)
		355	{
		356	struct inode *inode;
		357	struct dentry *root;
		358
		359	if (parse_options(sb, data)) {
		360	warn("usbfs: mount parameter error:");
		361	return -EINVAL;
		362	}
		363
		364	sb->s_blocksize = PAGE_CACHE_SIZE;
		365	sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
		366	sb->s_magic = USBDEVICE_SUPER_MAGIC;
		367	sb->s_op = &usbfs_ops;
		368	inode = usbfs_get_inode(sb, S_IFDIR \| 0755, 0);
		369
		370	if (!inode) {
		371	dbg("%s: could not get inode!",__FUNCTION__);
		372	return -ENOMEM;
		373	}
		374
		375	root = d_alloc_root(inode);
		376	if (!root) {
		377	dbg("%s: could not get root dentry!",__FUNCTION__);
		378	iput(inode);
		379	return -ENOMEM;
		380	}
		381	sb->s_root = root;
		382	return 0;
		383	}
		384
		385	static struct dentry * get_dentry(struct dentry parent, const char name)
		386	{
		387	struct qstr qstr;
		388
		389	qstr.name = name;
		390	qstr.len = strlen(name);
		391	qstr.hash = full_name_hash(name,qstr.len);
		392	return lookup_hash(&qstr,parent);
		393	}
		394
		395
		396	/*
		397	* fs_create_by_name - create a file, given a name
		398	* @name: name of file
		399	* @mode: type of file
		400	* @parent: dentry of directory to create it in
		401	* @dentry: resulting dentry of file
		402	*
		403	* This function handles both regular files and directories.
		404	*/
		405	static int fs_create_by_name (const char *name, mode_t mode,
		406	struct dentry parent, struct dentry *dentry)
		407	{
		408	int error = 0;
		409
		410	/* If the parent is not specified, we create it in the root.
		411	* We need the root dentry to do this, which is in the super
		412	* block. A pointer to that is in the struct vfsmount that we
		413	* have around.
		414	*/
		415	if (!parent ) {
		416	if (usbfs_mount && usbfs_mount->mnt_sb) {
		417	parent = usbfs_mount->mnt_sb->s_root;
		418	}
		419	}
		420
		421	if (!parent) {
		422	dbg("Ah! can not find a parent!");
		423	return -EFAULT;
		424	}
		425
		426	*dentry = NULL;
		427	down(&parent->d_inode->i_sem);
		428	*dentry = get_dentry (parent, name);
		429	if (!IS_ERR(dentry)) {
		430	if ((mode & S_IFMT) == S_IFDIR)
		431	error = usbfs_mkdir (parent->d_inode, *dentry, mode);
		432	else
		433	error = usbfs_create (parent->d_inode, *dentry, mode);
		434	} else
		435	error = PTR_ERR(dentry);
		436	up(&parent->d_inode->i_sem);
		437
		438	return error;
		439	}
		440
		441	static struct dentry fs_create_file (const char name, mode_t mode,
		442	struct dentry parent, void data,
		443	struct file_operations *fops,
		444	uid_t uid, gid_t gid)
		445	{
		446	struct dentry *dentry;
		447	int error;
		448
		449	dbg("creating file '%s'",name);
		450
		451	error = fs_create_by_name (name, mode, parent, &dentry);
		452	if (error) {
		453	dentry = NULL;
		454	} else {
		455	if (dentry->d_inode) {
		456	if (data)
		457	dentry->d_inode->u.generic_ip = data;
		458	if (fops)
		459	dentry->d_inode->i_fop = fops;
		460	dentry->d_inode->i_uid = uid;
		461	dentry->d_inode->i_gid = gid;
		462	}
		463	}
		464
		465	return dentry;
		466	}
		467
		468	static void fs_remove_file (struct dentry *dentry)
		469	{
		470	struct dentry *parent = dentry->d_parent;
		471
		472	if (!parent \|\| !parent->d_inode)
		473	return;
		474
		475	down(&parent->d_inode->i_sem);
		476	if (usbfs_positive(dentry)) {
		477	if (dentry->d_inode) {
		478	if (S_ISDIR(dentry->d_inode->i_mode))
		479	usbfs_rmdir(parent->d_inode, dentry);
		480	else
		481	usbfs_unlink(parent->d_inode, dentry);
		482	dput(dentry);
		483	}
		484	}
		485	up(&parent->d_inode->i_sem);
		486	}
		487
		488	/* --------------------------------------------------------------------- */
		489
		490
		491
		492	/*
		493	* The usbdevfs name is now deprecated (as of 2.5.1).
		494	* It will be removed when the 2.7.x development cycle is started.
		495	* You have been warned :)
		496	*/
		497	static struct file_system_type usbdevice_fs_type;
		498
		499	static struct super_block usb_get_sb(struct file_system_type fs_type,
		500	int flags, const char dev_name, void data)
		501	{
		502	return get_sb_single(fs_type, flags, data, usbfs_fill_super);
		503	}
		504
		505	static struct file_system_type usbdevice_fs_type = {
		506	.owner = THIS_MODULE,
		507	.name = "usbdevfs",
		508	.get_sb = usb_get_sb,
		509	.kill_sb = kill_litter_super,
		510	};
		511
		512	static struct file_system_type usb_fs_type = {
		513	.owner = THIS_MODULE,
		514	.name = "usbfs",
		515	.get_sb = usb_get_sb,
		516	.kill_sb = kill_litter_super,
		517	};
		518
		519	/* --------------------------------------------------------------------- */
		520
		521	static int create_special_files (void)
		522	{
		523	struct dentry *parent;
		524	int retval;
		525
		526	/* create the devices special file */
		527	retval = simple_pin_fs("usbdevfs", &usbdevfs_mount, &usbdevfs_mount_count);
		528	if (retval) {
		529	err ("Unable to get usbdevfs mount");
		530	goto exit;
		531	}
		532
		533	retval = simple_pin_fs("usbfs", &usbfs_mount, &usbfs_mount_count);
		534	if (retval) {
		535	err ("Unable to get usbfs mount");
		536	goto error_clean_usbdevfs_mount;
		537	}
		538
		539	parent = usbfs_mount->mnt_sb->s_root;
		540	devices_usbfs_dentry = fs_create_file ("devices",
		541	listmode \| S_IFREG, parent,
		542	NULL, &usbdevfs_devices_fops,
		543	listuid, listgid);
		544	if (devices_usbfs_dentry == NULL) {
		545	err ("Unable to create devices usbfs file");
		546	retval = -ENODEV;
		547	goto error_clean_mounts;
		548	}
		549
		550	parent = usbdevfs_mount->mnt_sb->s_root;
		551	devices_usbdevfs_dentry = fs_create_file ("devices",
		552	listmode \| S_IFREG, parent,
		553	NULL, &usbdevfs_devices_fops,
		554	listuid, listgid);
		555	if (devices_usbdevfs_dentry == NULL) {
		556	err ("Unable to create devices usbfs file");
		557	retval = -ENODEV;
		558	goto error_remove_file;
		559	}
		560
		561	goto exit;
		562
		563	error_remove_file:
		564	fs_remove_file (devices_usbfs_dentry);
		565	devices_usbfs_dentry = NULL;
		566
		567	error_clean_mounts:
		568	simple_release_fs(&usbfs_mount, &usbfs_mount_count);
		569
		570	error_clean_usbdevfs_mount:
		571	simple_release_fs(&usbdevfs_mount, &usbdevfs_mount_count);
		572
		573	exit:
		574	return retval;
		575	}
		576
		577	static void remove_special_files (void)
		578	{
		579	if (devices_usbdevfs_dentry)
		580	fs_remove_file (devices_usbdevfs_dentry);
		581	if (devices_usbfs_dentry)
		582	fs_remove_file (devices_usbfs_dentry);
		583	devices_usbdevfs_dentry = NULL;
		584	devices_usbfs_dentry = NULL;
		585	simple_release_fs(&usbdevfs_mount, &usbdevfs_mount_count);
		586	simple_release_fs(&usbfs_mount, &usbfs_mount_count);
		587	}
		588
		589	void usbfs_update_special (void)
		590	{
		591	struct inode *inode;
		592
		593	if (devices_usbdevfs_dentry) {
		594	inode = devices_usbdevfs_dentry->d_inode;
		595	if (inode)
		596	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
		597	}
		598	if (devices_usbfs_dentry) {
		599	inode = devices_usbfs_dentry->d_inode;
		600	if (inode)
		601	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
		602	}
		603	}
		604
		605	void usbfs_add_bus(struct usb_bus *bus)
		606	{
		607	struct dentry *parent;
		608	char name[8];
		609	int retval;
		610
		611	/* create the special files if this is the first bus added */
		612	if (num_buses == 0) {
		613	retval = create_special_files();
		614	if (retval)
		615	return;
		616	}
		617	++num_buses;
		618
		619	sprintf (name, "%03d", bus->busnum);
		620
		621	parent = usbfs_mount->mnt_sb->s_root;
		622	bus->usbfs_dentry = fs_create_file (name, busmode \| S_IFDIR, parent,
		623	bus, NULL, busuid, busgid);
		624	if (bus->usbfs_dentry == NULL) {
		625	err ("error creating usbfs bus entry");
		626	return;
		627	}
		628
		629	parent = usbdevfs_mount->mnt_sb->s_root;
		630	bus->usbdevfs_dentry = fs_create_file (name, busmode \| S_IFDIR, parent,
		631	bus, NULL, busuid, busgid);
		632	if (bus->usbdevfs_dentry == NULL) {
		633	err ("error creating usbdevfs bus entry");
		634	return;
		635	}
		636
		637	usbfs_update_special();
		638	usbdevfs_conn_disc_event();
		639	}
		640
		641
		642	void usbfs_remove_bus(struct usb_bus *bus)
		643	{
		644	if (bus->usbfs_dentry) {
		645	fs_remove_file (bus->usbfs_dentry);
		646	bus->usbfs_dentry = NULL;
		647	}
		648	if (bus->usbdevfs_dentry) {
		649	fs_remove_file (bus->usbdevfs_dentry);
		650	bus->usbdevfs_dentry = NULL;
		651	}
		652
		653	--num_buses;
		654	if (num_buses <= 0) {
		655	remove_special_files();
		656	num_buses = 0;
		657	}
		658
		659	usbfs_update_special();
		660	usbdevfs_conn_disc_event();
		661	}
		662
		663	void usbfs_add_device(struct usb_device *dev)
		664	{
		665	char name[8];
		666	int i;
		667	int i_size;
		668
		669	sprintf (name, "%03d", dev->devnum);
		670	dev->usbfs_dentry = fs_create_file (name, devmode \| S_IFREG,
		671	dev->bus->usbfs_dentry, dev,
		672	&usbdevfs_device_file_operations,
		673	devuid, devgid);
		674	if (dev->usbfs_dentry == NULL) {
		675	err ("error creating usbfs device entry");
		676	return;
		677	}
		678	dev->usbdevfs_dentry = fs_create_file (name, devmode \| S_IFREG,
		679	dev->bus->usbdevfs_dentry, dev,
		680	&usbdevfs_device_file_operations,
		681	devuid, devgid);
		682	if (dev->usbdevfs_dentry == NULL) {
		683	err ("error creating usbdevfs device entry");
		684	return;
		685	}
		686
		687	/* Set the size of the device's file to be
		688	* equal to the size of the device descriptors. */
		689	i_size = sizeof (struct usb_device_descriptor);
		690	for (i = 0; i < dev->descriptor.bNumConfigurations; ++i) {
		691	struct usb_config_descriptor *config =
		692	(struct usb_config_descriptor *)dev->rawdescriptors[i];
		693	i_size += le16_to_cpu (config->wTotalLength);
		694	}
		695	if (dev->usbfs_dentry->d_inode)
		696	dev->usbfs_dentry->d_inode->i_size = i_size;
		697	if (dev->usbdevfs_dentry->d_inode)
		698	dev->usbdevfs_dentry->d_inode->i_size = i_size;
		699
		700	usbfs_update_special();
		701	usbdevfs_conn_disc_event();
		702	}
		703
		704	void usbfs_remove_device(struct usb_device *dev)
		705	{
		706	struct dev_state *ds;
		707	struct siginfo sinfo;
		708
		709	if (dev->usbfs_dentry) {
		710	fs_remove_file (dev->usbfs_dentry);
		711	dev->usbfs_dentry = NULL;
		712	}
		713	if (dev->usbdevfs_dentry) {
		714	fs_remove_file (dev->usbdevfs_dentry);
		715	dev->usbdevfs_dentry = NULL;
		716	}
		717	while (!list_empty(&dev->filelist)) {
		718	ds = list_entry(dev->filelist.next, struct dev_state, list);
		719	list_del_init(&ds->list);
		720	down_write(&ds->devsem);
		721	ds->dev = NULL;
		722	up_write(&ds->devsem);
		723	if (ds->discsignr) {
		724	sinfo.si_signo = SIGPIPE;
		725	sinfo.si_errno = EPIPE;
		726	sinfo.si_code = SI_ASYNCIO;
		727	sinfo.si_addr = ds->disccontext;
		728	send_sig_info(ds->discsignr, &sinfo, ds->disctask);
		729	}
		730	}
		731	usbfs_update_special();
		732	usbdevfs_conn_disc_event();
		733	}
		734
		735	/* --------------------------------------------------------------------- */
		736
		737	#ifdef CONFIG_PROC_FS
		738	static struct proc_dir_entry *usbdir = NULL;
		739	#endif
		740
		741	int __init usbfs_init(void)
		742	{
		743	int retval;
		744
		745	retval = usb_register(&usbdevfs_driver);
		746	if (retval)
		747	return retval;
		748
		749	retval = register_filesystem(&usb_fs_type);
		750	if (retval) {
		751	usb_deregister(&usbdevfs_driver);
		752	return retval;
		753	}
		754	retval = register_filesystem(&usbdevice_fs_type);
		755	if (retval) {
		756	unregister_filesystem(&usb_fs_type);
		757	usb_deregister(&usbdevfs_driver);
		758	return retval;
		759	}
		760
		761	#ifdef CONFIG_PROC_FS
		762	/* create mount point for usbdevfs */
		763	usbdir = proc_mkdir("usb", proc_bus);
		764	#endif
		765
		766	return 0;
		767	}
		768
		769	void __exit usbfs_cleanup(void)
		770	{
		771	usb_deregister(&usbdevfs_driver);
		772	unregister_filesystem(&usb_fs_type);
		773	unregister_filesystem(&usbdevice_fs_type);
		774	#ifdef CONFIG_PROC_FS
		775	if (usbdir)
		776	remove_proc_entry("usb", proc_bus);
		777	#endif
		778	}
		779

Subversion Repositories shark

(root)/shark/branches/xen/drivers/usb/core/unused/inode.c - Rev 1618