mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-18 08:35:08 +08:00
USB: remove CONFIG_USB_DEVICEFS
This option has been deprecated for many years now, and no userspace tools use it anymore, so it should be safe to finally remove it. Reported-by: Kay Sievers <kay@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman
parent
70f3c7586c
commit
fb28d58b72
@ -87,7 +87,6 @@ kernel as built-in or modules:
|
||||
CONFIG_SOUND - Sound card support
|
||||
CONFIG_SND - Advanced Linux Sound Architecture
|
||||
CONFIG_USB - Support for Host-side USB
|
||||
CONFIG_USB_DEVICEFS - USB device filesystem
|
||||
CONFIG_USB_EHCI_HCD - EHCI HCD (USB 2.0) support
|
||||
|
||||
Additionally, to use the example application, the following options need to
|
||||
|
||||
@ -27,35 +27,6 @@ config USB_ANNOUNCE_NEW_DEVICES
|
||||
comment "Miscellaneous USB options"
|
||||
depends on USB
|
||||
|
||||
config USB_DEVICEFS
|
||||
bool "USB device filesystem (DEPRECATED)"
|
||||
depends on USB
|
||||
---help---
|
||||
If you say Y here (and to "/proc file system support" in the "File
|
||||
systems" section, above), you will get a file /proc/bus/usb/devices
|
||||
which lists the devices currently connected to your USB bus or
|
||||
busses, and for every connected device a file named
|
||||
"/proc/bus/usb/xxx/yyy", where xxx is the bus number and yyy the
|
||||
device number; the latter files can be used by user space programs
|
||||
to talk directly to the device. These files are "virtual", meaning
|
||||
they are generated on the fly and not stored on the hard drive.
|
||||
|
||||
You may need to mount the usbfs file system to see the files, use
|
||||
mount -t usbfs none /proc/bus/usb
|
||||
|
||||
For the format of the various /proc/bus/usb/ files, please read
|
||||
<file:Documentation/usb/proc_usb_info.txt>.
|
||||
|
||||
Modern Linux systems do not use this.
|
||||
|
||||
Usbfs entries are files and not character devices; usbfs can't
|
||||
handle Access Control Lists (ACL) which are the default way to
|
||||
grant access to USB devices for untrusted users of a desktop
|
||||
system.
|
||||
|
||||
The usbfs functionality is replaced by real device-nodes managed by
|
||||
udev. These nodes lived in /dev/bus/usb and are used by libusb.
|
||||
|
||||
config USB_DEVICE_CLASS
|
||||
bool "USB device class-devices (DEPRECATED)"
|
||||
depends on USB
|
||||
|
||||
@ -9,6 +9,5 @@ usbcore-y += config.o file.o buffer.o sysfs.o endpoint.o
|
||||
usbcore-y += devio.o notify.o generic.o quirks.o devices.o
|
||||
|
||||
usbcore-$(CONFIG_PCI) += hcd-pci.o
|
||||
usbcore-$(CONFIG_USB_DEVICEFS) += inode.o
|
||||
|
||||
obj-$(CONFIG_USB) += usbcore.o
|
||||
|
||||
@ -727,17 +727,6 @@ static int usbdev_open(struct inode *inode, struct file *file)
|
||||
if (imajor(inode) == USB_DEVICE_MAJOR)
|
||||
dev = usbdev_lookup_by_devt(inode->i_rdev);
|
||||
|
||||
#ifdef CONFIG_USB_DEVICEFS
|
||||
/* procfs file */
|
||||
if (!dev) {
|
||||
dev = inode->i_private;
|
||||
if (dev && dev->usbfs_dentry &&
|
||||
dev->usbfs_dentry->d_inode == inode)
|
||||
usb_get_dev(dev);
|
||||
else
|
||||
dev = NULL;
|
||||
}
|
||||
#endif
|
||||
mutex_unlock(&usbfs_mutex);
|
||||
|
||||
if (!dev)
|
||||
|
||||
@ -726,16 +726,6 @@ static int usb_uevent(struct device *dev, struct kobj_uevent_env *env)
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_USB_DEVICEFS
|
||||
/* If this is available, userspace programs can directly read
|
||||
* all the device descriptors we don't tell them about. Or
|
||||
* act as usermode drivers.
|
||||
*/
|
||||
if (add_uevent_var(env, "DEVICE=/proc/bus/usb/%03d/%03d",
|
||||
usb_dev->bus->busnum, usb_dev->devnum))
|
||||
return -ENOMEM;
|
||||
#endif
|
||||
|
||||
/* per-device configurations are common */
|
||||
if (add_uevent_var(env, "PRODUCT=%x/%x/%x",
|
||||
le16_to_cpu(usb_dev->descriptor.idVendor),
|
||||
@ -788,15 +778,13 @@ int usb_register_device_driver(struct usb_device_driver *new_udriver,
|
||||
|
||||
retval = driver_register(&new_udriver->drvwrap.driver);
|
||||
|
||||
if (!retval) {
|
||||
if (!retval)
|
||||
pr_info("%s: registered new device driver %s\n",
|
||||
usbcore_name, new_udriver->name);
|
||||
usbfs_update_special();
|
||||
} else {
|
||||
else
|
||||
printk(KERN_ERR "%s: error %d registering device "
|
||||
" driver %s\n",
|
||||
usbcore_name, retval, new_udriver->name);
|
||||
}
|
||||
|
||||
return retval;
|
||||
}
|
||||
@ -815,7 +803,6 @@ void usb_deregister_device_driver(struct usb_device_driver *udriver)
|
||||
usbcore_name, udriver->name);
|
||||
|
||||
driver_unregister(&udriver->drvwrap.driver);
|
||||
usbfs_update_special();
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(usb_deregister_device_driver);
|
||||
|
||||
@ -856,8 +843,6 @@ int usb_register_driver(struct usb_driver *new_driver, struct module *owner,
|
||||
if (retval)
|
||||
goto out;
|
||||
|
||||
usbfs_update_special();
|
||||
|
||||
retval = usb_create_newid_files(new_driver);
|
||||
if (retval)
|
||||
goto out_newid;
|
||||
@ -897,8 +882,6 @@ void usb_deregister(struct usb_driver *driver)
|
||||
usb_remove_newid_files(driver);
|
||||
driver_unregister(&driver->drvwrap.driver);
|
||||
usb_free_dynids(driver);
|
||||
|
||||
usbfs_update_special();
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(usb_deregister);
|
||||
|
||||
|
||||
@ -1,748 +0,0 @@
|
||||
/*****************************************************************************/
|
||||
|
||||
/*
|
||||
* inode.c -- Inode/Dentry functions for the USB device file system.
|
||||
*
|
||||
* Copyright (C) 2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
|
||||
* Copyright (C) 2001,2002,2004 Greg Kroah-Hartman (greg@kroah.com)
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*
|
||||
* History:
|
||||
* 0.1 04.01.2000 Created
|
||||
* 0.2 10.12.2001 converted to use the vfs layer better
|
||||
*/
|
||||
|
||||
/*****************************************************************************/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/mount.h>
|
||||
#include <linux/pagemap.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/proc_fs.h>
|
||||
#include <linux/usb.h>
|
||||
#include <linux/namei.h>
|
||||
#include <linux/usbdevice_fs.h>
|
||||
#include <linux/parser.h>
|
||||
#include <linux/notifier.h>
|
||||
#include <linux/seq_file.h>
|
||||
#include <linux/usb/hcd.h>
|
||||
#include <asm/byteorder.h>
|
||||
#include "usb.h"
|
||||
|
||||
#define USBFS_DEFAULT_DEVMODE (S_IWUSR | S_IRUGO)
|
||||
#define USBFS_DEFAULT_BUSMODE (S_IXUGO | S_IRUGO)
|
||||
#define USBFS_DEFAULT_LISTMODE S_IRUGO
|
||||
|
||||
static const struct file_operations default_file_operations;
|
||||
static struct vfsmount *usbfs_mount;
|
||||
static int usbfs_mount_count; /* = 0 */
|
||||
|
||||
static struct dentry *devices_usbfs_dentry;
|
||||
static int num_buses; /* = 0 */
|
||||
|
||||
static uid_t devuid; /* = 0 */
|
||||
static uid_t busuid; /* = 0 */
|
||||
static uid_t listuid; /* = 0 */
|
||||
static gid_t devgid; /* = 0 */
|
||||
static gid_t busgid; /* = 0 */
|
||||
static gid_t listgid; /* = 0 */
|
||||
static umode_t devmode = USBFS_DEFAULT_DEVMODE;
|
||||
static umode_t busmode = USBFS_DEFAULT_BUSMODE;
|
||||
static umode_t listmode = USBFS_DEFAULT_LISTMODE;
|
||||
|
||||
static int usbfs_show_options(struct seq_file *seq, struct dentry *root)
|
||||
{
|
||||
if (devuid != 0)
|
||||
seq_printf(seq, ",devuid=%u", devuid);
|
||||
if (devgid != 0)
|
||||
seq_printf(seq, ",devgid=%u", devgid);
|
||||
if (devmode != USBFS_DEFAULT_DEVMODE)
|
||||
seq_printf(seq, ",devmode=%o", devmode);
|
||||
if (busuid != 0)
|
||||
seq_printf(seq, ",busuid=%u", busuid);
|
||||
if (busgid != 0)
|
||||
seq_printf(seq, ",busgid=%u", busgid);
|
||||
if (busmode != USBFS_DEFAULT_BUSMODE)
|
||||
seq_printf(seq, ",busmode=%o", busmode);
|
||||
if (listuid != 0)
|
||||
seq_printf(seq, ",listuid=%u", listuid);
|
||||
if (listgid != 0)
|
||||
seq_printf(seq, ",listgid=%u", listgid);
|
||||
if (listmode != USBFS_DEFAULT_LISTMODE)
|
||||
seq_printf(seq, ",listmode=%o", listmode);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
enum {
|
||||
Opt_devuid, Opt_devgid, Opt_devmode,
|
||||
Opt_busuid, Opt_busgid, Opt_busmode,
|
||||
Opt_listuid, Opt_listgid, Opt_listmode,
|
||||
Opt_err,
|
||||
};
|
||||
|
||||
static const match_table_t tokens = {
|
||||
{Opt_devuid, "devuid=%u"},
|
||||
{Opt_devgid, "devgid=%u"},
|
||||
{Opt_devmode, "devmode=%o"},
|
||||
{Opt_busuid, "busuid=%u"},
|
||||
{Opt_busgid, "busgid=%u"},
|
||||
{Opt_busmode, "busmode=%o"},
|
||||
{Opt_listuid, "listuid=%u"},
|
||||
{Opt_listgid, "listgid=%u"},
|
||||
{Opt_listmode, "listmode=%o"},
|
||||
{Opt_err, NULL}
|
||||
};
|
||||
|
||||
static int parse_options(struct super_block *s, char *data)
|
||||
{
|
||||
char *p;
|
||||
int option;
|
||||
|
||||
/* (re)set to defaults. */
|
||||
devuid = 0;
|
||||
busuid = 0;
|
||||
listuid = 0;
|
||||
devgid = 0;
|
||||
busgid = 0;
|
||||
listgid = 0;
|
||||
devmode = USBFS_DEFAULT_DEVMODE;
|
||||
busmode = USBFS_DEFAULT_BUSMODE;
|
||||
listmode = USBFS_DEFAULT_LISTMODE;
|
||||
|
||||
while ((p = strsep(&data, ",")) != NULL) {
|
||||
substring_t args[MAX_OPT_ARGS];
|
||||
int token;
|
||||
if (!*p)
|
||||
continue;
|
||||
|
||||
token = match_token(p, tokens, args);
|
||||
switch (token) {
|
||||
case Opt_devuid:
|
||||
if (match_int(&args[0], &option))
|
||||
return -EINVAL;
|
||||
devuid = option;
|
||||
break;
|
||||
case Opt_devgid:
|
||||
if (match_int(&args[0], &option))
|
||||
return -EINVAL;
|
||||
devgid = option;
|
||||
break;
|
||||
case Opt_devmode:
|
||||
if (match_octal(&args[0], &option))
|
||||
return -EINVAL;
|
||||
devmode = option & S_IRWXUGO;
|
||||
break;
|
||||
case Opt_busuid:
|
||||
if (match_int(&args[0], &option))
|
||||
return -EINVAL;
|
||||
busuid = option;
|
||||
break;
|
||||
case Opt_busgid:
|
||||
if (match_int(&args[0], &option))
|
||||
return -EINVAL;
|
||||
busgid = option;
|
||||
break;
|
||||
case Opt_busmode:
|
||||
if (match_octal(&args[0], &option))
|
||||
return -EINVAL;
|
||||
busmode = option & S_IRWXUGO;
|
||||
break;
|
||||
case Opt_listuid:
|
||||
if (match_int(&args[0], &option))
|
||||
return -EINVAL;
|
||||
listuid = option;
|
||||
break;
|
||||
case Opt_listgid:
|
||||
if (match_int(&args[0], &option))
|
||||
return -EINVAL;
|
||||
listgid = option;
|
||||
break;
|
||||
case Opt_listmode:
|
||||
if (match_octal(&args[0], &option))
|
||||
return -EINVAL;
|
||||
listmode = option & S_IRWXUGO;
|
||||
break;
|
||||
default:
|
||||
printk(KERN_ERR "usbfs: unrecognised mount option "
|
||||
"\"%s\" or missing value\n", p);
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void update_special(struct dentry *special)
|
||||
{
|
||||
special->d_inode->i_uid = listuid;
|
||||
special->d_inode->i_gid = listgid;
|
||||
special->d_inode->i_mode = S_IFREG | listmode;
|
||||
}
|
||||
|
||||
static void update_dev(struct dentry *dev)
|
||||
{
|
||||
dev->d_inode->i_uid = devuid;
|
||||
dev->d_inode->i_gid = devgid;
|
||||
dev->d_inode->i_mode = S_IFREG | devmode;
|
||||
}
|
||||
|
||||
static void update_bus(struct dentry *bus)
|
||||
{
|
||||
struct dentry *dev = NULL;
|
||||
|
||||
bus->d_inode->i_uid = busuid;
|
||||
bus->d_inode->i_gid = busgid;
|
||||
bus->d_inode->i_mode = S_IFDIR | busmode;
|
||||
|
||||
mutex_lock(&bus->d_inode->i_mutex);
|
||||
|
||||
list_for_each_entry(dev, &bus->d_subdirs, d_u.d_child)
|
||||
if (dev->d_inode)
|
||||
update_dev(dev);
|
||||
|
||||
mutex_unlock(&bus->d_inode->i_mutex);
|
||||
}
|
||||
|
||||
static void update_sb(struct super_block *sb)
|
||||
{
|
||||
struct dentry *root = sb->s_root;
|
||||
struct dentry *bus = NULL;
|
||||
|
||||
if (!root)
|
||||
return;
|
||||
|
||||
mutex_lock_nested(&root->d_inode->i_mutex, I_MUTEX_PARENT);
|
||||
|
||||
list_for_each_entry(bus, &root->d_subdirs, d_u.d_child) {
|
||||
if (bus->d_inode) {
|
||||
switch (S_IFMT & bus->d_inode->i_mode) {
|
||||
case S_IFDIR:
|
||||
update_bus(bus);
|
||||
break;
|
||||
case S_IFREG:
|
||||
update_special(bus);
|
||||
break;
|
||||
default:
|
||||
printk(KERN_WARNING "usbfs: Unknown node %s "
|
||||
"mode %x found on remount!\n",
|
||||
bus->d_name.name, bus->d_inode->i_mode);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
mutex_unlock(&root->d_inode->i_mutex);
|
||||
}
|
||||
|
||||
static int remount(struct super_block *sb, int *flags, char *data)
|
||||
{
|
||||
/* If this is not a real mount,
|
||||
* i.e. it's a simple_pin_fs from create_special_files,
|
||||
* then ignore it.
|
||||
*/
|
||||
if (*flags & MS_KERNMOUNT)
|
||||
return 0;
|
||||
|
||||
if (parse_options(sb, data)) {
|
||||
printk(KERN_WARNING "usbfs: mount parameter error.\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (usbfs_mount)
|
||||
update_sb(usbfs_mount->mnt_sb);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct inode *usbfs_get_inode (struct super_block *sb, umode_t mode, dev_t dev)
|
||||
{
|
||||
struct inode *inode = new_inode(sb);
|
||||
|
||||
if (inode) {
|
||||
inode->i_ino = get_next_ino();
|
||||
inode_init_owner(inode, NULL, mode);
|
||||
inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
|
||||
switch (mode & S_IFMT) {
|
||||
default:
|
||||
init_special_inode(inode, mode, dev);
|
||||
break;
|
||||
case S_IFREG:
|
||||
inode->i_fop = &default_file_operations;
|
||||
break;
|
||||
case S_IFDIR:
|
||||
inode->i_op = &simple_dir_inode_operations;
|
||||
inode->i_fop = &simple_dir_operations;
|
||||
|
||||
/* directory inodes start off with i_nlink == 2 (for "." entry) */
|
||||
inc_nlink(inode);
|
||||
break;
|
||||
}
|
||||
}
|
||||
return inode;
|
||||
}
|
||||
|
||||
/* SMP-safe */
|
||||
static int usbfs_mknod (struct inode *dir, struct dentry *dentry, umode_t mode,
|
||||
dev_t dev)
|
||||
{
|
||||
struct inode *inode = usbfs_get_inode(dir->i_sb, mode, dev);
|
||||
int error = -EPERM;
|
||||
|
||||
if (dentry->d_inode)
|
||||
return -EEXIST;
|
||||
|
||||
if (inode) {
|
||||
d_instantiate(dentry, inode);
|
||||
dget(dentry);
|
||||
error = 0;
|
||||
}
|
||||
return error;
|
||||
}
|
||||
|
||||
static int usbfs_mkdir (struct inode *dir, struct dentry *dentry, umode_t mode)
|
||||
{
|
||||
int res;
|
||||
|
||||
mode = (mode & (S_IRWXUGO | S_ISVTX)) | S_IFDIR;
|
||||
res = usbfs_mknod (dir, dentry, mode, 0);
|
||||
if (!res)
|
||||
inc_nlink(dir);
|
||||
return res;
|
||||
}
|
||||
|
||||
static int usbfs_create (struct inode *dir, struct dentry *dentry, umode_t mode)
|
||||
{
|
||||
mode = (mode & S_IALLUGO) | S_IFREG;
|
||||
return usbfs_mknod (dir, dentry, mode, 0);
|
||||
}
|
||||
|
||||
static inline int usbfs_positive (struct dentry *dentry)
|
||||
{
|
||||
return dentry->d_inode && !d_unhashed(dentry);
|
||||
}
|
||||
|
||||
static int usbfs_empty (struct dentry *dentry)
|
||||
{
|
||||
struct list_head *list;
|
||||
|
||||
spin_lock(&dentry->d_lock);
|
||||
list_for_each(list, &dentry->d_subdirs) {
|
||||
struct dentry *de = list_entry(list, struct dentry, d_u.d_child);
|
||||
|
||||
spin_lock_nested(&de->d_lock, DENTRY_D_LOCK_NESTED);
|
||||
if (usbfs_positive(de)) {
|
||||
spin_unlock(&de->d_lock);
|
||||
spin_unlock(&dentry->d_lock);
|
||||
return 0;
|
||||
}
|
||||
spin_unlock(&de->d_lock);
|
||||
}
|
||||
spin_unlock(&dentry->d_lock);
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int usbfs_unlink (struct inode *dir, struct dentry *dentry)
|
||||
{
|
||||
struct inode *inode = dentry->d_inode;
|
||||
mutex_lock(&inode->i_mutex);
|
||||
drop_nlink(dentry->d_inode);
|
||||
dput(dentry);
|
||||
mutex_unlock(&inode->i_mutex);
|
||||
d_delete(dentry);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int usbfs_rmdir(struct inode *dir, struct dentry *dentry)
|
||||
{
|
||||
int error = -ENOTEMPTY;
|
||||
struct inode * inode = dentry->d_inode;
|
||||
|
||||
mutex_lock(&inode->i_mutex);
|
||||
dentry_unhash(dentry);
|
||||
if (usbfs_empty(dentry)) {
|
||||
dont_mount(dentry);
|
||||
drop_nlink(dentry->d_inode);
|
||||
drop_nlink(dentry->d_inode);
|
||||
dput(dentry);
|
||||
inode->i_flags |= S_DEAD;
|
||||
drop_nlink(dir);
|
||||
error = 0;
|
||||
}
|
||||
mutex_unlock(&inode->i_mutex);
|
||||
if (!error)
|
||||
d_delete(dentry);
|
||||
return error;
|
||||
}
|
||||
|
||||
|
||||
/* default file operations */
|
||||
static ssize_t default_read_file (struct file *file, char __user *buf,
|
||||
size_t count, loff_t *ppos)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static ssize_t default_write_file (struct file *file, const char __user *buf,
|
||||
size_t count, loff_t *ppos)
|
||||
{
|
||||
return count;
|
||||
}
|
||||
|
||||
static loff_t default_file_lseek (struct file *file, loff_t offset, int orig)
|
||||
{
|
||||
loff_t retval = -EINVAL;
|
||||
|
||||
mutex_lock(&file->f_path.dentry->d_inode->i_mutex);
|
||||
switch(orig) {
|
||||
case 0:
|
||||
if (offset > 0) {
|
||||
file->f_pos = offset;
|
||||
retval = file->f_pos;
|
||||
}
|
||||
break;
|
||||
case 1:
|
||||
if ((offset + file->f_pos) > 0) {
|
||||
file->f_pos += offset;
|
||||
retval = file->f_pos;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
mutex_unlock(&file->f_path.dentry->d_inode->i_mutex);
|
||||
return retval;
|
||||
}
|
||||
|
||||
static const struct file_operations default_file_operations = {
|
||||
.read = default_read_file,
|
||||
.write = default_write_file,
|
||||
.open = simple_open,
|
||||
.llseek = default_file_lseek,
|
||||
};
|
||||
|
||||
static const struct super_operations usbfs_ops = {
|
||||
.statfs = simple_statfs,
|
||||
.drop_inode = generic_delete_inode,
|
||||
.remount_fs = remount,
|
||||
.show_options = usbfs_show_options,
|
||||
};
|
||||
|
||||
static int usbfs_fill_super(struct super_block *sb, void *data, int silent)
|
||||
{
|
||||
struct inode *inode;
|
||||
|
||||
sb->s_blocksize = PAGE_CACHE_SIZE;
|
||||
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
|
||||
sb->s_magic = USBDEVICE_SUPER_MAGIC;
|
||||
sb->s_op = &usbfs_ops;
|
||||
sb->s_time_gran = 1;
|
||||
inode = usbfs_get_inode(sb, S_IFDIR | 0755, 0);
|
||||
sb->s_root = d_make_root(inode);
|
||||
if (!sb->s_root) {
|
||||
dbg("%s: could not get root dentry!",__func__);
|
||||
return -ENOMEM;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* fs_create_by_name - create a file, given a name
|
||||
* @name: name of file
|
||||
* @mode: type of file
|
||||
* @parent: dentry of directory to create it in
|
||||
* @dentry: resulting dentry of file
|
||||
*
|
||||
* This function handles both regular files and directories.
|
||||
*/
|
||||
static int fs_create_by_name (const char *name, umode_t mode,
|
||||
struct dentry *parent, struct dentry **dentry)
|
||||
{
|
||||
int error = 0;
|
||||
|
||||
/* If the parent is not specified, we create it in the root.
|
||||
* We need the root dentry to do this, which is in the super
|
||||
* block. A pointer to that is in the struct vfsmount that we
|
||||
* have around.
|
||||
*/
|
||||
if (!parent ) {
|
||||
if (usbfs_mount)
|
||||
parent = usbfs_mount->mnt_root;
|
||||
}
|
||||
|
||||
if (!parent) {
|
||||
dbg("Ah! can not find a parent!");
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
*dentry = NULL;
|
||||
mutex_lock(&parent->d_inode->i_mutex);
|
||||
*dentry = lookup_one_len(name, parent, strlen(name));
|
||||
if (!IS_ERR(*dentry)) {
|
||||
if (S_ISDIR(mode))
|
||||
error = usbfs_mkdir (parent->d_inode, *dentry, mode);
|
||||
else
|
||||
error = usbfs_create (parent->d_inode, *dentry, mode);
|
||||
} else
|
||||
error = PTR_ERR(*dentry);
|
||||
mutex_unlock(&parent->d_inode->i_mutex);
|
||||
|
||||
return error;
|
||||
}
|
||||
|
||||
static struct dentry *fs_create_file (const char *name, umode_t mode,
|
||||
struct dentry *parent, void *data,
|
||||
const struct file_operations *fops,
|
||||
uid_t uid, gid_t gid)
|
||||
{
|
||||
struct dentry *dentry;
|
||||
int error;
|
||||
|
||||
dbg("creating file '%s'",name);
|
||||
|
||||
error = fs_create_by_name (name, mode, parent, &dentry);
|
||||
if (error) {
|
||||
dentry = NULL;
|
||||
} else {
|
||||
if (dentry->d_inode) {
|
||||
if (data)
|
||||
dentry->d_inode->i_private = data;
|
||||
if (fops)
|
||||
dentry->d_inode->i_fop = fops;
|
||||
dentry->d_inode->i_uid = uid;
|
||||
dentry->d_inode->i_gid = gid;
|
||||
}
|
||||
}
|
||||
|
||||
return dentry;
|
||||
}
|
||||
|
||||
static void fs_remove_file (struct dentry *dentry)
|
||||
{
|
||||
struct dentry *parent = dentry->d_parent;
|
||||
|
||||
if (!parent || !parent->d_inode)
|
||||
return;
|
||||
|
||||
mutex_lock_nested(&parent->d_inode->i_mutex, I_MUTEX_PARENT);
|
||||
if (usbfs_positive(dentry)) {
|
||||
if (dentry->d_inode) {
|
||||
if (S_ISDIR(dentry->d_inode->i_mode))
|
||||
usbfs_rmdir(parent->d_inode, dentry);
|
||||
else
|
||||
usbfs_unlink(parent->d_inode, dentry);
|
||||
dput(dentry);
|
||||
}
|
||||
}
|
||||
mutex_unlock(&parent->d_inode->i_mutex);
|
||||
}
|
||||
|
||||
/* --------------------------------------------------------------------- */
|
||||
|
||||
static struct dentry *usb_mount(struct file_system_type *fs_type,
|
||||
int flags, const char *dev_name, void *data)
|
||||
{
|
||||
return mount_single(fs_type, flags, data, usbfs_fill_super);
|
||||
}
|
||||
|
||||
static struct file_system_type usb_fs_type = {
|
||||
.owner = THIS_MODULE,
|
||||
.name = "usbfs",
|
||||
.mount = usb_mount,
|
||||
.kill_sb = kill_litter_super,
|
||||
};
|
||||
|
||||
/* --------------------------------------------------------------------- */
|
||||
|
||||
static int create_special_files (void)
|
||||
{
|
||||
struct dentry *parent;
|
||||
int retval;
|
||||
|
||||
/* create the devices special file */
|
||||
retval = simple_pin_fs(&usb_fs_type, &usbfs_mount, &usbfs_mount_count);
|
||||
if (retval) {
|
||||
printk(KERN_ERR "Unable to get usbfs mount\n");
|
||||
goto exit;
|
||||
}
|
||||
|
||||
parent = usbfs_mount->mnt_root;
|
||||
devices_usbfs_dentry = fs_create_file ("devices",
|
||||
listmode | S_IFREG, parent,
|
||||
NULL, &usbfs_devices_fops,
|
||||
listuid, listgid);
|
||||
if (devices_usbfs_dentry == NULL) {
|
||||
printk(KERN_ERR "Unable to create devices usbfs file\n");
|
||||
retval = -ENODEV;
|
||||
goto error_clean_mounts;
|
||||
}
|
||||
|
||||
goto exit;
|
||||
|
||||
error_clean_mounts:
|
||||
simple_release_fs(&usbfs_mount, &usbfs_mount_count);
|
||||
exit:
|
||||
return retval;
|
||||
}
|
||||
|
||||
static void remove_special_files (void)
|
||||
{
|
||||
if (devices_usbfs_dentry)
|
||||
fs_remove_file (devices_usbfs_dentry);
|
||||
devices_usbfs_dentry = NULL;
|
||||
simple_release_fs(&usbfs_mount, &usbfs_mount_count);
|
||||
}
|
||||
|
||||
void usbfs_update_special (void)
|
||||
{
|
||||
struct inode *inode;
|
||||
|
||||
if (devices_usbfs_dentry) {
|
||||
inode = devices_usbfs_dentry->d_inode;
|
||||
if (inode)
|
||||
inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
|
||||
}
|
||||
}
|
||||
|
||||
static void usbfs_add_bus(struct usb_bus *bus)
|
||||
{
|
||||
struct dentry *parent;
|
||||
char name[8];
|
||||
int retval;
|
||||
|
||||
/* create the special files if this is the first bus added */
|
||||
if (num_buses == 0) {
|
||||
retval = create_special_files();
|
||||
if (retval)
|
||||
return;
|
||||
}
|
||||
++num_buses;
|
||||
|
||||
sprintf (name, "%03d", bus->busnum);
|
||||
|
||||
parent = usbfs_mount->mnt_root;
|
||||
bus->usbfs_dentry = fs_create_file (name, busmode | S_IFDIR, parent,
|
||||
bus, NULL, busuid, busgid);
|
||||
if (bus->usbfs_dentry == NULL) {
|
||||
printk(KERN_ERR "Error creating usbfs bus entry\n");
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
static void usbfs_remove_bus(struct usb_bus *bus)
|
||||
{
|
||||
if (bus->usbfs_dentry) {
|
||||
fs_remove_file (bus->usbfs_dentry);
|
||||
bus->usbfs_dentry = NULL;
|
||||
}
|
||||
|
||||
--num_buses;
|
||||
if (num_buses <= 0) {
|
||||
remove_special_files();
|
||||
num_buses = 0;
|
||||
}
|
||||
}
|
||||
|
||||
static void usbfs_add_device(struct usb_device *dev)
|
||||
{
|
||||
char name[8];
|
||||
int i;
|
||||
int i_size;
|
||||
|
||||
sprintf (name, "%03d", dev->devnum);
|
||||
dev->usbfs_dentry = fs_create_file (name, devmode | S_IFREG,
|
||||
dev->bus->usbfs_dentry, dev,
|
||||
&usbdev_file_operations,
|
||||
devuid, devgid);
|
||||
if (dev->usbfs_dentry == NULL) {
|
||||
printk(KERN_ERR "Error creating usbfs device entry\n");
|
||||
return;
|
||||
}
|
||||
|
||||
/* Set the size of the device's file to be
|
||||
* equal to the size of the device descriptors. */
|
||||
i_size = sizeof (struct usb_device_descriptor);
|
||||
for (i = 0; i < dev->descriptor.bNumConfigurations; ++i) {
|
||||
struct usb_config_descriptor *config =
|
||||
(struct usb_config_descriptor *)dev->rawdescriptors[i];
|
||||
i_size += le16_to_cpu(config->wTotalLength);
|
||||
}
|
||||
if (dev->usbfs_dentry->d_inode)
|
||||
dev->usbfs_dentry->d_inode->i_size = i_size;
|
||||
}
|
||||
|
||||
static void usbfs_remove_device(struct usb_device *dev)
|
||||
{
|
||||
if (dev->usbfs_dentry) {
|
||||
fs_remove_file (dev->usbfs_dentry);
|
||||
dev->usbfs_dentry = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
static int usbfs_notify(struct notifier_block *self, unsigned long action, void *dev)
|
||||
{
|
||||
switch (action) {
|
||||
case USB_DEVICE_ADD:
|
||||
usbfs_add_device(dev);
|
||||
break;
|
||||
case USB_DEVICE_REMOVE:
|
||||
usbfs_remove_device(dev);
|
||||
break;
|
||||
case USB_BUS_ADD:
|
||||
usbfs_add_bus(dev);
|
||||
break;
|
||||
case USB_BUS_REMOVE:
|
||||
usbfs_remove_bus(dev);
|
||||
}
|
||||
|
||||
usbfs_update_special();
|
||||
usbfs_conn_disc_event();
|
||||
return NOTIFY_OK;
|
||||
}
|
||||
|
||||
static struct notifier_block usbfs_nb = {
|
||||
.notifier_call = usbfs_notify,
|
||||
};
|
||||
|
||||
/* --------------------------------------------------------------------- */
|
||||
|
||||
static struct proc_dir_entry *usbdir = NULL;
|
||||
|
||||
int __init usbfs_init(void)
|
||||
{
|
||||
int retval;
|
||||
|
||||
retval = register_filesystem(&usb_fs_type);
|
||||
if (retval)
|
||||
return retval;
|
||||
|
||||
usb_register_notify(&usbfs_nb);
|
||||
|
||||
/* create mount point for usbfs */
|
||||
usbdir = proc_mkdir("bus/usb", NULL);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void usbfs_cleanup(void)
|
||||
{
|
||||
usb_unregister_notify(&usbfs_nb);
|
||||
unregister_filesystem(&usb_fs_type);
|
||||
if (usbdir)
|
||||
remove_proc_entry("bus/usb", NULL);
|
||||
}
|
||||
|
||||
@ -1030,9 +1030,6 @@ static int __init usb_init(void)
|
||||
retval = usb_devio_init();
|
||||
if (retval)
|
||||
goto usb_devio_init_failed;
|
||||
retval = usbfs_init();
|
||||
if (retval)
|
||||
goto fs_init_failed;
|
||||
retval = usb_hub_init();
|
||||
if (retval)
|
||||
goto hub_init_failed;
|
||||
@ -1042,8 +1039,6 @@ static int __init usb_init(void)
|
||||
|
||||
usb_hub_cleanup();
|
||||
hub_init_failed:
|
||||
usbfs_cleanup();
|
||||
fs_init_failed:
|
||||
usb_devio_cleanup();
|
||||
usb_devio_init_failed:
|
||||
usb_deregister(&usbfs_driver);
|
||||
@ -1070,7 +1065,6 @@ static void __exit usb_exit(void)
|
||||
|
||||
usb_deregister_device_driver(&usb_generic_driver);
|
||||
usb_major_cleanup();
|
||||
usbfs_cleanup();
|
||||
usb_deregister(&usbfs_driver);
|
||||
usb_devio_cleanup();
|
||||
usb_hub_cleanup();
|
||||
|
||||
@ -351,10 +351,6 @@ struct usb_bus {
|
||||
int bandwidth_int_reqs; /* number of Interrupt requests */
|
||||
int bandwidth_isoc_reqs; /* number of Isoc. requests */
|
||||
|
||||
#ifdef CONFIG_USB_DEVICEFS
|
||||
struct dentry *usbfs_dentry; /* usbfs dentry entry for the bus */
|
||||
#endif
|
||||
|
||||
#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)
|
||||
struct mon_bus *mon_bus; /* non-null when associated */
|
||||
int monitored; /* non-zero when monitored */
|
||||
@ -496,9 +492,6 @@ struct usb_device {
|
||||
#ifdef CONFIG_USB_DEVICE_CLASS
|
||||
struct device *usb_classdev;
|
||||
#endif
|
||||
#ifdef CONFIG_USB_DEVICEFS
|
||||
struct dentry *usbfs_dentry;
|
||||
#endif
|
||||
|
||||
int maxchild;
|
||||
struct usb_device **children;
|
||||
|
||||
@ -582,29 +582,6 @@ static inline void usb_hcd_resume_root_hub(struct usb_hcd *hcd)
|
||||
}
|
||||
#endif /* CONFIG_USB_SUSPEND */
|
||||
|
||||
|
||||
/*
|
||||
* USB device fs stuff
|
||||
*/
|
||||
|
||||
#ifdef CONFIG_USB_DEVICEFS
|
||||
|
||||
/*
|
||||
* these are expected to be called from the USB core/hub thread
|
||||
* with the kernel lock held
|
||||
*/
|
||||
extern void usbfs_update_special(void);
|
||||
extern int usbfs_init(void);
|
||||
extern void usbfs_cleanup(void);
|
||||
|
||||
#else /* CONFIG_USB_DEVICEFS */
|
||||
|
||||
static inline void usbfs_update_special(void) {}
|
||||
static inline int usbfs_init(void) { return 0; }
|
||||
static inline void usbfs_cleanup(void) { }
|
||||
|
||||
#endif /* CONFIG_USB_DEVICEFS */
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user