#include <linux/isdn/capiutil.h>
#include <linux/isdn/capicmd.h>
-#include "capifs.h"
-
MODULE_DESCRIPTION("CAPI4Linux: Userspace /dev/capi20 interface");
MODULE_AUTHOR("Carsten Paeth");
MODULE_LICENSE("GPL");
struct kref kref;
unsigned int minor;
- struct dentry *capifs_dentry;
struct capi20_appl *ap;
u32 ncci;
static void capincci_alloc_minor(struct capidev *cdev, struct capincci *np)
{
- struct capiminor *mp;
- dev_t device;
-
- if (!(cdev->userflags & CAPIFLAG_HIGHJACKING))
- return;
-
- mp = np->minorp = capiminor_alloc(&cdev->ap, np->ncci);
- if (mp) {
- device = MKDEV(capinc_tty_driver->major, mp->minor);
- mp->capifs_dentry = capifs_new_ncci(mp->minor, device);
- }
+ if (cdev->userflags & CAPIFLAG_HIGHJACKING)
+ np->minorp = capiminor_alloc(&cdev->ap, np->ncci);
}
static void capincci_free_minor(struct capincci *np)
struct tty_struct *tty;
if (mp) {
- capifs_free_ncci(mp->capifs_dentry);
-
tty = tty_port_tty_get(&mp->port);
if (tty) {
tty_vhangup(tty);
proc_init();
-#if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
- compileinfo = " (middleware+capifs)";
-#elif defined(CONFIG_ISDN_CAPI_MIDDLEWARE)
- compileinfo = " (no capifs)";
+#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
+ compileinfo = " (middleware)";
#else
compileinfo = " (no middleware)";
#endif
+++ /dev/null
-/* $Id: capifs.c,v 1.1.2.3 2004/01/16 21:09:26 keil Exp $
- *
- * Copyright 2000 by Carsten Paeth <calle@calle.de>
- *
- * Heavily based on devpts filesystem from H. Peter Anvin
- *
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by reference.
- *
- */
-
-#include <linux/fs.h>
-#include <linux/mount.h>
-#include <linux/slab.h>
-#include <linux/namei.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/ctype.h>
-#include <linux/sched.h> /* current */
-
-#include "capifs.h"
-
-MODULE_DESCRIPTION("CAPI4Linux: /dev/capi/ filesystem");
-MODULE_AUTHOR("Carsten Paeth");
-MODULE_LICENSE("GPL");
-
-/* ------------------------------------------------------------------ */
-
-#define CAPIFS_SUPER_MAGIC (('C'<<8)|'N')
-
-static struct vfsmount *capifs_mnt;
-static int capifs_mnt_count;
-
-static struct {
- int setuid;
- int setgid;
- uid_t uid;
- gid_t gid;
- umode_t mode;
-} config = {.mode = 0600};
-
-/* ------------------------------------------------------------------ */
-
-static int capifs_remount(struct super_block *s, int *flags, char *data)
-{
- int setuid = 0;
- int setgid = 0;
- uid_t uid = 0;
- gid_t gid = 0;
- umode_t mode = 0600;
- char *this_char;
- char *new_opt = kstrdup(data, GFP_KERNEL);
-
- this_char = NULL;
- while ((this_char = strsep(&data, ",")) != NULL) {
- int n;
- char dummy;
- if (!*this_char)
- continue;
- if (sscanf(this_char, "uid=%i%c", &n, &dummy) == 1) {
- setuid = 1;
- uid = n;
- } else if (sscanf(this_char, "gid=%i%c", &n, &dummy) == 1) {
- setgid = 1;
- gid = n;
- } else if (sscanf(this_char, "mode=%o%c", &n, &dummy) == 1)
- mode = n & ~S_IFMT;
- else {
- kfree(new_opt);
- printk("capifs: called with bogus options\n");
- return -EINVAL;
- }
- }
-
- mutex_lock(&s->s_root->d_inode->i_mutex);
-
- replace_mount_options(s, new_opt);
- config.setuid = setuid;
- config.setgid = setgid;
- config.uid = uid;
- config.gid = gid;
- config.mode = mode;
-
- mutex_unlock(&s->s_root->d_inode->i_mutex);
-
- return 0;
-}
-
-static const struct super_operations capifs_sops =
-{
- .statfs = simple_statfs,
- .remount_fs = capifs_remount,
- .show_options = generic_show_options,
-};
-
-
-static int
-capifs_fill_super(struct super_block *s, void *data, int silent)
-{
- struct inode * inode;
-
- s->s_blocksize = 1024;
- s->s_blocksize_bits = 10;
- s->s_magic = CAPIFS_SUPER_MAGIC;
- s->s_op = &capifs_sops;
- s->s_time_gran = 1;
-
- inode = new_inode(s);
- if (!inode)
- goto fail;
- inode->i_ino = 1;
- inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
- inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO | S_IWUSR;
- inode->i_op = &simple_dir_inode_operations;
- inode->i_fop = &simple_dir_operations;
- inode->i_nlink = 2;
-
- s->s_root = d_alloc_root(inode);
- if (s->s_root)
- return 0;
-
- printk("capifs: get root dentry failed\n");
- iput(inode);
-fail:
- return -ENOMEM;
-}
-
-static struct dentry *capifs_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
-{
- return mount_single(fs_type, flags, data, capifs_fill_super);
-}
-
-static struct file_system_type capifs_fs_type = {
- .owner = THIS_MODULE,
- .name = "capifs",
- .mount = capifs_mount,
- .kill_sb = kill_anon_super,
-};
-
-static struct dentry *new_ncci(unsigned int number, dev_t device)
-{
- struct super_block *s = capifs_mnt->mnt_sb;
- struct dentry *root = s->s_root;
- struct dentry *dentry;
- struct inode *inode;
- char name[10];
- int namelen;
-
- mutex_lock(&root->d_inode->i_mutex);
-
- namelen = sprintf(name, "%d", number);
- dentry = lookup_one_len(name, root, namelen);
- if (IS_ERR(dentry)) {
- dentry = NULL;
- goto unlock_out;
- }
-
- if (dentry->d_inode) {
- dput(dentry);
- dentry = NULL;
- goto unlock_out;
- }
-
- inode = new_inode(s);
- if (!inode) {
- dput(dentry);
- dentry = NULL;
- goto unlock_out;
- }
-
- /* config contents is protected by root's i_mutex */
- inode->i_uid = config.setuid ? config.uid : current_fsuid();
- inode->i_gid = config.setgid ? config.gid : current_fsgid();
- inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
- inode->i_ino = number + 2;
- init_special_inode(inode, S_IFCHR|config.mode, device);
-
- d_instantiate(dentry, inode);
- dget(dentry);
-
-unlock_out:
- mutex_unlock(&root->d_inode->i_mutex);
-
- return dentry;
-}
-
-struct dentry *capifs_new_ncci(unsigned int number, dev_t device)
-{
- struct dentry *dentry;
-
- if (simple_pin_fs(&capifs_fs_type, &capifs_mnt, &capifs_mnt_count) < 0)
- return NULL;
-
- dentry = new_ncci(number, device);
- if (!dentry)
- simple_release_fs(&capifs_mnt, &capifs_mnt_count);
-
- return dentry;
-}
-
-void capifs_free_ncci(struct dentry *dentry)
-{
- struct dentry *root = capifs_mnt->mnt_sb->s_root;
- struct inode *inode;
-
- if (!dentry)
- return;
-
- mutex_lock(&root->d_inode->i_mutex);
-
- inode = dentry->d_inode;
- if (inode) {
- drop_nlink(inode);
- d_delete(dentry);
- dput(dentry);
- }
- dput(dentry);
-
- mutex_unlock(&root->d_inode->i_mutex);
-
- simple_release_fs(&capifs_mnt, &capifs_mnt_count);
-}
-
-static int __init capifs_init(void)
-{
- return register_filesystem(&capifs_fs_type);
-}
-
-static void __exit capifs_exit(void)
-{
- unregister_filesystem(&capifs_fs_type);
-}
-
-EXPORT_SYMBOL(capifs_new_ncci);
-EXPORT_SYMBOL(capifs_free_ncci);
-
-module_init(capifs_init);
-module_exit(capifs_exit);
projects / GitHub / MotorolaMobilityLLC / kernel-slsi.git / commitdiff