diff options
Diffstat (limited to 'drivers/isdn/capi/capifs.c')
| -rw-r--r-- | drivers/isdn/capi/capifs.c | 223 |
1 files changed, 0 insertions, 223 deletions
diff --git a/drivers/isdn/capi/capifs.c b/drivers/isdn/capi/capifs.c deleted file mode 100644 index 550e80f390a..00000000000 --- a/drivers/isdn/capi/capifs.c +++ /dev/null @@ -1,223 +0,0 @@ -/* $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/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"); - -/* ------------------------------------------------------------------ */ - -static char *revision = "$Revision: 1.1.2.3 $"; - -/* ------------------------------------------------------------------ */ - -#define CAPIFS_SUPER_MAGIC (('C'<<8)|'N') - -static struct vfsmount *capifs_mnt; -static struct dentry *capifs_root; - -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; - } - } - - kfree(s->s_options); - s->s_options = new_opt; - - config.setuid = setuid; - config.setgid = setgid; - config.uid = uid; - config.gid = gid; - config.mode = mode; - - return 0; -} - -static 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_blocks = 0; - inode->i_uid = inode->i_gid = 0; - 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; - - capifs_root = 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 int capifs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) -{ - return get_sb_single(fs_type, flags, data, capifs_fill_super, mnt); -} - -static struct file_system_type capifs_fs_type = { - .owner = THIS_MODULE, - .name = "capifs", - .get_sb = capifs_get_sb, - .kill_sb = kill_anon_super, -}; - -static struct dentry *get_node(int num) -{ - char s[10]; - struct dentry *root = capifs_root; - mutex_lock(&root->d_inode->i_mutex); - return lookup_one_len(s, root, sprintf(s, "%d", num)); -} - -void capifs_new_ncci(unsigned int number, dev_t device) -{ - struct dentry *dentry; - struct inode *inode = new_inode(capifs_mnt->mnt_sb); - if (!inode) - return; - inode->i_ino = number+2; - 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; - init_special_inode(inode, S_IFCHR|config.mode, device); - //inode->i_op = &capifs_file_inode_operations; - - dentry = get_node(number); - if (!IS_ERR(dentry) && !dentry->d_inode) - d_instantiate(dentry, inode); - mutex_unlock(&capifs_root->d_inode->i_mutex); -} - -void capifs_free_ncci(unsigned int number) -{ - struct dentry *dentry = get_node(number); - - if (!IS_ERR(dentry)) { - struct inode *inode = dentry->d_inode; - if (inode) { - inode->i_nlink--; - d_delete(dentry); - dput(dentry); - } - dput(dentry); - } - mutex_unlock(&capifs_root->d_inode->i_mutex); -} - -static int __init capifs_init(void) -{ - char rev[32]; - char *p; - int err; - - if ((p = strchr(revision, ':')) != NULL && p[1]) { - strlcpy(rev, p + 2, sizeof(rev)); - if ((p = strchr(rev, '$')) != NULL && p > rev) - *(p-1) = 0; - } else - strcpy(rev, "1.0"); - - err = register_filesystem(&capifs_fs_type); - if (!err) { - capifs_mnt = kern_mount(&capifs_fs_type); - if (IS_ERR(capifs_mnt)) { - err = PTR_ERR(capifs_mnt); - unregister_filesystem(&capifs_fs_type); - } - } - if (!err) - printk(KERN_NOTICE "capifs: Rev %s\n", rev); - return err; -} - -static void __exit capifs_exit(void) -{ - unregister_filesystem(&capifs_fs_type); - mntput(capifs_mnt); -} - -EXPORT_SYMBOL(capifs_new_ncci); -EXPORT_SYMBOL(capifs_free_ncci); - -module_init(capifs_init); -module_exit(capifs_exit); |