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@@ -1,748 +0,0 @@
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-/*****************************************************************************/
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-
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-/*
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- * inode.c -- Inode/Dentry functions for the USB device file system.
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- *
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- * Copyright (C) 2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
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- * Copyright (C) 2001,2002,2004 Greg Kroah-Hartman (greg@kroah.com)
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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- *
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- * History:
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- * 0.1 04.01.2000 Created
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- * 0.2 10.12.2001 converted to use the vfs layer better
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- */
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-
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-/*****************************************************************************/
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-
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-#include <linux/module.h>
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-#include <linux/fs.h>
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-#include <linux/mount.h>
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-#include <linux/pagemap.h>
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-#include <linux/init.h>
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-#include <linux/proc_fs.h>
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-#include <linux/usb.h>
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-#include <linux/namei.h>
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-#include <linux/usbdevice_fs.h>
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-#include <linux/parser.h>
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-#include <linux/notifier.h>
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-#include <linux/seq_file.h>
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-#include <linux/usb/hcd.h>
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-#include <asm/byteorder.h>
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-#include "usb.h"
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-
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-#define USBFS_DEFAULT_DEVMODE (S_IWUSR | S_IRUGO)
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-#define USBFS_DEFAULT_BUSMODE (S_IXUGO | S_IRUGO)
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-#define USBFS_DEFAULT_LISTMODE S_IRUGO
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-
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-static const struct file_operations default_file_operations;
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-static struct vfsmount *usbfs_mount;
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-static int usbfs_mount_count; /* = 0 */
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-
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-static struct dentry *devices_usbfs_dentry;
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-static int num_buses; /* = 0 */
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-
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-static uid_t devuid; /* = 0 */
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-static uid_t busuid; /* = 0 */
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-static uid_t listuid; /* = 0 */
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-static gid_t devgid; /* = 0 */
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-static gid_t busgid; /* = 0 */
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-static gid_t listgid; /* = 0 */
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-static umode_t devmode = USBFS_DEFAULT_DEVMODE;
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-static umode_t busmode = USBFS_DEFAULT_BUSMODE;
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-static umode_t listmode = USBFS_DEFAULT_LISTMODE;
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-
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-static int usbfs_show_options(struct seq_file *seq, struct dentry *root)
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-{
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- if (devuid != 0)
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- seq_printf(seq, ",devuid=%u", devuid);
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- if (devgid != 0)
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- seq_printf(seq, ",devgid=%u", devgid);
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- if (devmode != USBFS_DEFAULT_DEVMODE)
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- seq_printf(seq, ",devmode=%o", devmode);
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- if (busuid != 0)
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- seq_printf(seq, ",busuid=%u", busuid);
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- if (busgid != 0)
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- seq_printf(seq, ",busgid=%u", busgid);
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- if (busmode != USBFS_DEFAULT_BUSMODE)
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- seq_printf(seq, ",busmode=%o", busmode);
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- if (listuid != 0)
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- seq_printf(seq, ",listuid=%u", listuid);
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- if (listgid != 0)
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- seq_printf(seq, ",listgid=%u", listgid);
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- if (listmode != USBFS_DEFAULT_LISTMODE)
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- seq_printf(seq, ",listmode=%o", listmode);
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-
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- return 0;
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-}
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-
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-enum {
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- Opt_devuid, Opt_devgid, Opt_devmode,
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- Opt_busuid, Opt_busgid, Opt_busmode,
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- Opt_listuid, Opt_listgid, Opt_listmode,
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- Opt_err,
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-};
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-
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-static const match_table_t tokens = {
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- {Opt_devuid, "devuid=%u"},
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- {Opt_devgid, "devgid=%u"},
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- {Opt_devmode, "devmode=%o"},
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- {Opt_busuid, "busuid=%u"},
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- {Opt_busgid, "busgid=%u"},
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- {Opt_busmode, "busmode=%o"},
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- {Opt_listuid, "listuid=%u"},
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- {Opt_listgid, "listgid=%u"},
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- {Opt_listmode, "listmode=%o"},
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- {Opt_err, NULL}
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-};
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-
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-static int parse_options(struct super_block *s, char *data)
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-{
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- char *p;
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- int option;
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-
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- /* (re)set to defaults. */
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- devuid = 0;
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- busuid = 0;
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- listuid = 0;
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- devgid = 0;
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- busgid = 0;
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- listgid = 0;
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- devmode = USBFS_DEFAULT_DEVMODE;
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- busmode = USBFS_DEFAULT_BUSMODE;
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- listmode = USBFS_DEFAULT_LISTMODE;
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-
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- while ((p = strsep(&data, ",")) != NULL) {
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- substring_t args[MAX_OPT_ARGS];
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- int token;
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- if (!*p)
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- continue;
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-
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- token = match_token(p, tokens, args);
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- switch (token) {
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- case Opt_devuid:
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- if (match_int(&args[0], &option))
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- return -EINVAL;
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- devuid = option;
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- break;
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- case Opt_devgid:
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- if (match_int(&args[0], &option))
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- return -EINVAL;
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- devgid = option;
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- break;
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- case Opt_devmode:
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- if (match_octal(&args[0], &option))
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- return -EINVAL;
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- devmode = option & S_IRWXUGO;
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- break;
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- case Opt_busuid:
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- if (match_int(&args[0], &option))
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- return -EINVAL;
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- busuid = option;
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- break;
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- case Opt_busgid:
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- if (match_int(&args[0], &option))
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- return -EINVAL;
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- busgid = option;
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- break;
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- case Opt_busmode:
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- if (match_octal(&args[0], &option))
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- return -EINVAL;
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- busmode = option & S_IRWXUGO;
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- break;
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- case Opt_listuid:
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- if (match_int(&args[0], &option))
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- return -EINVAL;
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- listuid = option;
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- break;
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- case Opt_listgid:
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- if (match_int(&args[0], &option))
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- return -EINVAL;
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- listgid = option;
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- break;
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- case Opt_listmode:
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- if (match_octal(&args[0], &option))
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- return -EINVAL;
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- listmode = option & S_IRWXUGO;
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- break;
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- default:
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- printk(KERN_ERR "usbfs: unrecognised mount option "
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- "\"%s\" or missing value\n", p);
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- return -EINVAL;
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- }
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- }
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-
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- return 0;
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-}
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-
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-static void update_special(struct dentry *special)
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-{
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- special->d_inode->i_uid = listuid;
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- special->d_inode->i_gid = listgid;
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- special->d_inode->i_mode = S_IFREG | listmode;
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-}
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-
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-static void update_dev(struct dentry *dev)
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-{
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- dev->d_inode->i_uid = devuid;
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- dev->d_inode->i_gid = devgid;
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- dev->d_inode->i_mode = S_IFREG | devmode;
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-}
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-
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-static void update_bus(struct dentry *bus)
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-{
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- struct dentry *dev = NULL;
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-
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- bus->d_inode->i_uid = busuid;
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- bus->d_inode->i_gid = busgid;
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- bus->d_inode->i_mode = S_IFDIR | busmode;
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-
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- mutex_lock(&bus->d_inode->i_mutex);
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-
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- list_for_each_entry(dev, &bus->d_subdirs, d_u.d_child)
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- if (dev->d_inode)
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- update_dev(dev);
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-
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- mutex_unlock(&bus->d_inode->i_mutex);
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-}
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-
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-static void update_sb(struct super_block *sb)
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-{
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- struct dentry *root = sb->s_root;
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- struct dentry *bus = NULL;
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-
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- if (!root)
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- return;
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-
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- mutex_lock_nested(&root->d_inode->i_mutex, I_MUTEX_PARENT);
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-
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- list_for_each_entry(bus, &root->d_subdirs, d_u.d_child) {
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- if (bus->d_inode) {
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- switch (S_IFMT & bus->d_inode->i_mode) {
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- case S_IFDIR:
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- update_bus(bus);
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- break;
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- case S_IFREG:
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- update_special(bus);
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- break;
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- default:
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- printk(KERN_WARNING "usbfs: Unknown node %s "
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- "mode %x found on remount!\n",
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- bus->d_name.name, bus->d_inode->i_mode);
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- break;
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- }
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- }
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- }
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-
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- mutex_unlock(&root->d_inode->i_mutex);
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-}
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-
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-static int remount(struct super_block *sb, int *flags, char *data)
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-{
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- /* If this is not a real mount,
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- * i.e. it's a simple_pin_fs from create_special_files,
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- * then ignore it.
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- */
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- if (*flags & MS_KERNMOUNT)
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- return 0;
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-
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- if (parse_options(sb, data)) {
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- printk(KERN_WARNING "usbfs: mount parameter error.\n");
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- return -EINVAL;
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- }
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-
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- if (usbfs_mount)
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- update_sb(usbfs_mount->mnt_sb);
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-
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- return 0;
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-}
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-
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-static struct inode *usbfs_get_inode (struct super_block *sb, umode_t mode, dev_t dev)
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-{
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- struct inode *inode = new_inode(sb);
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-
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- if (inode) {
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- inode->i_ino = get_next_ino();
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- inode_init_owner(inode, NULL, mode);
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- inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
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- switch (mode & S_IFMT) {
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- default:
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- init_special_inode(inode, mode, dev);
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- break;
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- case S_IFREG:
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- inode->i_fop = &default_file_operations;
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- break;
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- case S_IFDIR:
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- inode->i_op = &simple_dir_inode_operations;
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- inode->i_fop = &simple_dir_operations;
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-
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- /* directory inodes start off with i_nlink == 2 (for "." entry) */
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- inc_nlink(inode);
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- break;
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- }
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- }
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- return inode;
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-}
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-
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-/* SMP-safe */
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-static int usbfs_mknod (struct inode *dir, struct dentry *dentry, umode_t mode,
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- dev_t dev)
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-{
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- struct inode *inode = usbfs_get_inode(dir->i_sb, mode, dev);
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- int error = -EPERM;
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-
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- if (dentry->d_inode)
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- return -EEXIST;
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-
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- if (inode) {
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- d_instantiate(dentry, inode);
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- dget(dentry);
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- error = 0;
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- }
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- return error;
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-}
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-
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-static int usbfs_mkdir (struct inode *dir, struct dentry *dentry, umode_t mode)
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-{
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- int res;
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-
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- mode = (mode & (S_IRWXUGO | S_ISVTX)) | S_IFDIR;
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- res = usbfs_mknod (dir, dentry, mode, 0);
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- if (!res)
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- inc_nlink(dir);
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- return res;
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-}
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-
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-static int usbfs_create (struct inode *dir, struct dentry *dentry, umode_t mode)
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-{
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- mode = (mode & S_IALLUGO) | S_IFREG;
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- return usbfs_mknod (dir, dentry, mode, 0);
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-}
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-
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-static inline int usbfs_positive (struct dentry *dentry)
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-{
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- return dentry->d_inode && !d_unhashed(dentry);
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-}
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-
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-static int usbfs_empty (struct dentry *dentry)
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-{
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- struct list_head *list;
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-
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- spin_lock(&dentry->d_lock);
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- list_for_each(list, &dentry->d_subdirs) {
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- struct dentry *de = list_entry(list, struct dentry, d_u.d_child);
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-
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- spin_lock_nested(&de->d_lock, DENTRY_D_LOCK_NESTED);
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- if (usbfs_positive(de)) {
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- spin_unlock(&de->d_lock);
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- spin_unlock(&dentry->d_lock);
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- return 0;
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- }
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- spin_unlock(&de->d_lock);
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- }
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- spin_unlock(&dentry->d_lock);
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- return 1;
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-}
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-
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-static int usbfs_unlink (struct inode *dir, struct dentry *dentry)
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-{
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- struct inode *inode = dentry->d_inode;
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- mutex_lock(&inode->i_mutex);
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- drop_nlink(dentry->d_inode);
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- dput(dentry);
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- mutex_unlock(&inode->i_mutex);
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- d_delete(dentry);
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- return 0;
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-}
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-
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-static int usbfs_rmdir(struct inode *dir, struct dentry *dentry)
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-{
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- int error = -ENOTEMPTY;
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- struct inode * inode = dentry->d_inode;
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-
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- mutex_lock(&inode->i_mutex);
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- dentry_unhash(dentry);
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- if (usbfs_empty(dentry)) {
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- dont_mount(dentry);
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- drop_nlink(dentry->d_inode);
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- drop_nlink(dentry->d_inode);
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- dput(dentry);
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- inode->i_flags |= S_DEAD;
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- drop_nlink(dir);
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- error = 0;
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- }
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- mutex_unlock(&inode->i_mutex);
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- if (!error)
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- d_delete(dentry);
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- return error;
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-}
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-
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-
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-/* default file operations */
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-static ssize_t default_read_file (struct file *file, char __user *buf,
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- size_t count, loff_t *ppos)
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-{
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- return 0;
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-}
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-
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-static ssize_t default_write_file (struct file *file, const char __user *buf,
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- size_t count, loff_t *ppos)
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-{
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- return count;
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-}
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-
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-static loff_t default_file_lseek (struct file *file, loff_t offset, int orig)
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-{
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- loff_t retval = -EINVAL;
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-
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- mutex_lock(&file->f_path.dentry->d_inode->i_mutex);
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- switch(orig) {
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- case 0:
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|
|
- 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);
|
|
|
-}
|
|
|
-
|
Greg Kroah-Hartman