#include <linux/fs.h>
#include <linux/ctype.h>
#include <linux/capability.h>
+#include <linux/mount.h>
#include <linux/time.h>
#include <linux/sched.h>
#include <asm/current.h>
}
-int jfs_ioctl(struct inode * inode, struct file * filp, unsigned int cmd,
- unsigned long arg)
+long jfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
+ struct inode *inode = filp->f_dentry->d_inode;
struct jfs_inode_info *jfs_inode = JFS_IP(inode);
unsigned int flags;
return put_user(flags, (int __user *) arg);
case JFS_IOC_SETFLAGS: {
unsigned int oldflags;
+ int err;
- if (IS_RDONLY(inode))
- return -EROFS;
+ err = mnt_want_write(filp->f_path.mnt);
+ if (err)
+ return err;
- if (!is_owner_or_cap(inode))
- return -EACCES;
-
- if (get_user(flags, (int __user *) arg))
- return -EFAULT;
+ if (!is_owner_or_cap(inode)) {
+ err = -EACCES;
+ goto setflags_out;
+ }
+ if (get_user(flags, (int __user *) arg)) {
+ err = -EFAULT;
+ goto setflags_out;
+ }
flags = jfs_map_ext2(flags, 1);
if (!S_ISDIR(inode->i_mode))
flags &= ~JFS_DIRSYNC_FL;
+ /* Is it quota file? Do not allow user to mess with it */
+ if (IS_NOQUOTA(inode)) {
+ err = -EPERM;
+ goto setflags_out;
+ }
+
+ /* Lock against other parallel changes of flags */
+ mutex_lock(&inode->i_mutex);
+
jfs_get_inode_flags(jfs_inode);
oldflags = jfs_inode->mode2;
if ((oldflags & JFS_IMMUTABLE_FL) ||
((flags ^ oldflags) &
(JFS_APPEND_FL | JFS_IMMUTABLE_FL))) {
- if (!capable(CAP_LINUX_IMMUTABLE))
- return -EPERM;
+ if (!capable(CAP_LINUX_IMMUTABLE)) {
+ mutex_unlock(&inode->i_mutex);
+ err = -EPERM;
+ goto setflags_out;
+ }
}
flags = flags & JFS_FL_USER_MODIFIABLE;
jfs_inode->mode2 = flags;
jfs_set_inode_flags(inode);
+ mutex_unlock(&inode->i_mutex);
inode->i_ctime = CURRENT_TIME_SEC;
mark_inode_dirty(inode);
- return 0;
+setflags_out:
+ mnt_drop_write(filp->f_path.mnt);
+ return err;
}
default:
return -ENOTTY;
}
}
+#ifdef CONFIG_COMPAT
+long jfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ /* While these ioctl numbers defined with 'long' and have different
+ * numbers than the 64bit ABI,
+ * the actual implementation only deals with ints and is compatible.
+ */
+ switch (cmd) {
+ case JFS_IOC_GETFLAGS32:
+ cmd = JFS_IOC_GETFLAGS;
+ break;
+ case JFS_IOC_SETFLAGS32:
+ cmd = JFS_IOC_SETFLAGS;
+ break;
+ }
+ return jfs_ioctl(filp, cmd, arg);
+}
+#endif