static int debugfs_create(struct inode *dir, struct dentry *dentry, int mode)
{
int res;
mode = (mode & S_IALLUGO) | S_IFREG;
res = debugfs_mknod(dir, dentry, mode, 0);
if (!res)
fsnotify_create(dir, dentry);
return res;
}
static int debugfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
void *data, const struct file_operations *fops)
{
int res;
mode = (mode & S_IALLUGO) | S_IFREG;
res = debugfs_mknod(dir, dentry, mode, 0, data, fops);
if (!res)
fsnotify_create(dir, dentry);
return res;
}
int devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty)
{
int number = tty->index;
struct tty_driver *driver = tty->driver;
dev_t device = MKDEV(driver->major, driver->minor_start+number);
struct dentry *dentry;
struct super_block *sb = pts_sb_from_inode(ptmx_inode);
struct inode *inode = new_inode(sb);
struct dentry *root = sb->s_root;
struct pts_fs_info *fsi = DEVPTS_SB(sb);
struct pts_mount_opts *opts = &fsi->mount_opts;
int ret = 0;
char s[12];
BUG_ON(driver->type != TTY_DRIVER_TYPE_PTY);
BUG_ON(driver->subtype != PTY_TYPE_SLAVE);
if (!inode)
return -ENOMEM;
inode->i_ino = number + 3;
inode->i_uid = opts->setuid ? opts->uid : current_fsuid();
inode->i_gid = opts->setgid ? opts->gid : current_fsgid();
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
init_special_inode(inode, S_IFCHR|opts->mode, device);
inode->i_private = tty;
tty->driver_data = inode;
sprintf(s, "%d", number);
mutex_lock(&root->d_inode->i_mutex);
dentry = d_alloc_name(root, s);
if (dentry) {
d_add(dentry, inode);
fsnotify_create(root->d_inode, dentry);
} else {
iput(inode);
ret = -ENOMEM;
}
mutex_unlock(&root->d_inode->i_mutex);
return ret;
}
/*
* Ideally this function should call VFS:do_last() in order to keep all its
* checkings. But it is very hard for aufs to regenerate several VFS internal
* structure such as nameidata. This is a second (or third) best approach.
* cf. linux/fs/namei.c:do_last(), lookup_open() and atomic_open().
*/
int vfsub_atomic_open(struct inode *dir, struct dentry *dentry,
struct vfsub_aopen_args *args, struct au_branch *br)
{
int err;
struct file *file = args->file;
/* copied from linux/fs/namei.c:atomic_open() */
struct dentry *const DENTRY_NOT_SET = (void *)-1UL;
IMustLock(dir);
AuDebugOn(!dir->i_op->atomic_open);
err = au_br_test_oflag(args->open_flag, br);
if (unlikely(err))
goto out;
args->file->f_path.dentry = DENTRY_NOT_SET;
args->file->f_path.mnt = au_br_mnt(br);
err = dir->i_op->atomic_open(dir, dentry, file, args->open_flag,
args->create_mode, args->opened);
if (err >= 0) {
/* some filesystems don't set FILE_CREATED while succeeded? */
if (*args->opened & FILE_CREATED)
fsnotify_create(dir, dentry);
} else
goto out;
if (!err) {
/* todo: call VFS:may_open() here */
err = open_check_o_direct(file);
/* todo: ima_file_check() too? */
if (!err && (args->open_flag & __FMODE_EXEC))
err = deny_write_access(file);
if (unlikely(err))
/* note that the file is created and still opened */
goto out;
}
atomic_inc(&br->br_count);
fsnotify_open(file);
out:
return err;
}
/**
* devpts_pty_new -- create a new inode in /dev/pts/
* @ptmx_inode: inode of the master
* @device: major+minor of the node to be created
* @index: used as a name of the node
* @priv: what's given back by devpts_get_priv
*
* The created inode is returned. Remove it from /dev/pts/ by devpts_pty_kill.
*/
struct inode *devpts_pty_new(struct inode *ptmx_inode, dev_t device, int index,
void *priv)
{
struct dentry *dentry;
struct super_block *sb = pts_sb_from_inode(ptmx_inode);
struct inode *inode;
struct dentry *root = sb->s_root;
struct pts_fs_info *fsi = DEVPTS_SB(sb);
struct pts_mount_opts *opts = &fsi->mount_opts;
char s[12];
inode = new_inode(sb);
if (!inode)
return ERR_PTR(-ENOMEM);
inode->i_ino = index + 3;
inode->i_uid = opts->setuid ? opts->uid : current_fsuid();
inode->i_gid = opts->setgid ? opts->gid : current_fsgid();
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
init_special_inode(inode, S_IFCHR|opts->mode, device);
inode->i_private = priv;
sprintf(s, "%d", index);
mutex_lock(&root->d_inode->i_mutex);
dentry = d_alloc_name(root, s);
if (dentry) {
d_add(dentry, inode);
fsnotify_create(root->d_inode, dentry);
} else {
iput(inode);
inode = ERR_PTR(-ENOMEM);
}
mutex_unlock(&root->d_inode->i_mutex);
return inode;
}
int devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty)
{
int number = tty->index; /* tty layer puts index from devpts_new_index() in here */
struct tty_driver *driver = tty->driver;
dev_t device = MKDEV(driver->major, driver->minor_start+number);
struct dentry *dentry;
struct inode *inode = new_inode(devpts_mnt->mnt_sb);
char s[12];
/* We're supposed to be given the slave end of a pty */
BUG_ON(driver->type != TTY_DRIVER_TYPE_PTY);
BUG_ON(driver->subtype != PTY_TYPE_SLAVE);
if (!inode)
return -ENOMEM;
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_private = tty;
tty->driver_data = inode;
sprintf(s, "%d", number);
mutex_lock(&devpts_root->d_inode->i_mutex);
dentry = d_alloc_name(devpts_root, s);
if (!IS_ERR(dentry)) {
d_add(dentry, inode);
fsnotify_create(devpts_root->d_inode, dentry);
}
mutex_unlock(&devpts_root->d_inode->i_mutex);
return 0;
}
/**
* devpts_pty_new -- create a new inode in /dev/pts/
* @ptmx_inode: inode of the master
* @device: major+minor of the node to be created
* @index: used as a name of the node
* @priv: what's given back by devpts_get_priv
*
* The created inode is returned. Remove it from /dev/pts/ by devpts_pty_kill.
*/
struct dentry *devpts_pty_new(struct pts_fs_info *fsi, int index, void *priv)
{
struct dentry *dentry;
struct super_block *sb = fsi->sb;
struct inode *inode;
struct dentry *root;
struct pts_mount_opts *opts;
char s[12];
root = sb->s_root;
opts = &fsi->mount_opts;
inode = new_inode(sb);
if (!inode)
return ERR_PTR(-ENOMEM);
inode->i_ino = index + 3;
inode->i_uid = opts->setuid ? opts->uid : current_fsuid();
inode->i_gid = opts->setgid ? opts->gid : current_fsgid();
inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
init_special_inode(inode, S_IFCHR|opts->mode, MKDEV(UNIX98_PTY_SLAVE_MAJOR, index));
sprintf(s, "%d", index);
dentry = d_alloc_name(root, s);
if (dentry) {
dentry->d_fsdata = priv;
d_add(dentry, inode);
fsnotify_create(d_inode(root), dentry);
} else {
iput(inode);
dentry = ERR_PTR(-ENOMEM);
}
return dentry;
}
