* Copyright (C) 1991, 1992 Linus Torvalds
*/
+#include <linux/config.h>
+#include <linux/syscalls.h>
#include <linux/mm.h>
#include <linux/smp_lock.h>
+#include <linux/capability.h>
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/security.h>
+#include <linux/module.h>
+#include <linux/proc_fs.h>
+#include <linux/vserver/inode.h>
+#include <linux/vserver/xid.h>
#include <asm/uaccess.h>
#include <asm/ioctls.h>
-static int file_ioctl(struct file *filp,unsigned int cmd,unsigned long arg)
+
+#ifdef CONFIG_VSERVER_LEGACY
+extern int vx_proc_ioctl(struct inode *, struct file *,
+ unsigned int, unsigned long);
+#endif
+
+static long do_ioctl(struct file *filp, unsigned int cmd,
+ unsigned long arg)
+{
+ int error = -ENOTTY;
+
+ if (!filp->f_op)
+ goto out;
+
+ if (filp->f_op->unlocked_ioctl) {
+ error = filp->f_op->unlocked_ioctl(filp, cmd, arg);
+ if (error == -ENOIOCTLCMD)
+ error = -EINVAL;
+ goto out;
+ } else if (filp->f_op->ioctl) {
+ lock_kernel();
+ error = filp->f_op->ioctl(filp->f_dentry->d_inode,
+ filp, cmd, arg);
+ unlock_kernel();
+ }
+
+ out:
+ return error;
+}
+
+static int file_ioctl(struct file *filp, unsigned int cmd,
+ unsigned long arg)
{
int error;
int block;
struct inode * inode = filp->f_dentry->d_inode;
+ int __user *p = (int __user *)arg;
switch (cmd) {
case FIBMAP:
return -EINVAL;
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
- if ((error = get_user(block, (int *) arg)) != 0)
+ if ((error = get_user(block, p)) != 0)
return error;
+ lock_kernel();
res = mapping->a_ops->bmap(mapping, block);
- return put_user(res, (int *) arg);
+ unlock_kernel();
+ return put_user(res, p);
}
case FIGETBSZ:
if (inode->i_sb == NULL)
return -EBADF;
- return put_user(inode->i_sb->s_blocksize, (int *) arg);
+ return put_user(inode->i_sb->s_blocksize, p);
case FIONREAD:
- return put_user(i_size_read(inode) - filp->f_pos, (int *) arg);
+ return put_user(i_size_read(inode) - filp->f_pos, p);
}
- if (filp->f_op && filp->f_op->ioctl)
- return filp->f_op->ioctl(inode, filp, cmd, arg);
- return -ENOTTY;
-}
+ return do_ioctl(filp, cmd, arg);
+}
-asmlinkage long sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)
-{
- struct file * filp;
+/*
+ * When you add any new common ioctls to the switches above and below
+ * please update compat_sys_ioctl() too.
+ *
+ * vfs_ioctl() is not for drivers and not intended to be EXPORT_SYMBOL()'d.
+ * It's just a simple helper for sys_ioctl and compat_sys_ioctl.
+ */
+int vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd, unsigned long arg)
+{
unsigned int flag;
- int on, error = -EBADF;
-
- filp = fget(fd);
- if (!filp)
- goto out;
-
- error = security_file_ioctl(filp, cmd, arg);
- if (error) {
- fput(filp);
- goto out;
- }
+ int on, error = 0;
- lock_kernel();
switch (cmd) {
case FIOCLEX:
set_close_on_exec(fd, 1);
/* Did FASYNC state change ? */
if ((flag ^ filp->f_flags) & FASYNC) {
- if (filp->f_op && filp->f_op->fasync)
+ if (filp->f_op && filp->f_op->fasync) {
+ lock_kernel();
error = filp->f_op->fasync(fd, filp, on);
+ unlock_kernel();
+ }
else error = -ENOTTY;
}
if (error != 0)
else
error = -ENOTTY;
break;
- default:
+#ifdef CONFIG_VSERVER_LEGACY
+#ifndef CONFIG_INOXID_NONE
+ case FIOC_GETXID: {
+ struct inode *inode = filp->f_dentry->d_inode;
+
+ /* fixme: if stealth, return -ENOTTY */
+ error = -EPERM;
+ if (capable(CAP_CONTEXT))
+ error = put_user(inode->i_xid, (int __user *) arg);
+ break;
+ }
+ case FIOC_SETXID: {
+ struct inode *inode = filp->f_dentry->d_inode;
+ int xid;
+
+ /* fixme: if stealth, return -ENOTTY */
+ error = -EPERM;
+ if (!capable(CAP_CONTEXT))
+ break;
+ error = -EROFS;
+ if (IS_RDONLY(inode))
+ break;
+ error = -ENOSYS;
+ if (!(inode->i_sb->s_flags & MS_TAGXID))
+ break;
+ error = -EFAULT;
+ if (get_user(xid, (int __user *) arg))
+ break;
+ error = 0;
+ inode->i_xid = (xid & 0xFFFF);
+ inode->i_ctime = CURRENT_TIME;
+ mark_inode_dirty(inode);
+ break;
+ }
+#endif
+ case FIOC_GETXFLG:
+ case FIOC_SETXFLG:
error = -ENOTTY;
+ if (filp->f_dentry->d_inode->i_sb->s_magic == PROC_SUPER_MAGIC)
+ error = vx_proc_ioctl(filp->f_dentry->d_inode, filp, cmd, arg);
+ break;
+#endif
+ default:
if (S_ISREG(filp->f_dentry->d_inode->i_mode))
error = file_ioctl(filp, cmd, arg);
- else if (filp->f_op && filp->f_op->ioctl)
- error = filp->f_op->ioctl(filp->f_dentry->d_inode, filp, cmd, arg);
+ else
+ error = do_ioctl(filp, cmd, arg);
+ break;
}
- unlock_kernel();
- fput(filp);
+ return error;
+}
+
+asmlinkage long sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)
+{
+ struct file * filp;
+ int error = -EBADF;
+ int fput_needed;
+
+ filp = fget_light(fd, &fput_needed);
+ if (!filp)
+ goto out;
+
+ error = security_file_ioctl(filp, cmd, arg);
+ if (error)
+ goto out_fput;
-out:
+ error = vfs_ioctl(filp, fd, cmd, arg);
+ out_fput:
+ fput_light(filp, fput_needed);
+ out:
return error;
}
+
+/*
+ * Platforms implementing 32 bit compatibility ioctl handlers in
+ * modules need this exported
+ */
+#ifdef CONFIG_COMPAT
+EXPORT_SYMBOL(sys_ioctl);
+#endif
git://git.onelab.eu / linux-2.6.git / blobdiff