* Copyright (C) 1997, Stephen Tweedie
*
* Provide stub functions for unreadable inodes
+ *
+ * Fabian Frederick : August 2003 - All file operations assigned to EIO
*/
#include <linux/fs.h>
+#include <linux/export.h>
#include <linux/stat.h>
#include <linux/time.h>
+#include <linux/namei.h>
+#include <linux/poll.h>
-/*
- * The follow_link operation is special: it must behave as a no-op
- * so that a bad root inode can at least be unmounted. To do this
- * we must dput() the base and return the dentry with a dget().
- */
-static int bad_follow_link(struct dentry *dent, struct nameidata *nd)
+
+static loff_t bad_file_llseek(struct file *file, loff_t offset, int origin)
+{
+ return -EIO;
+}
+
+static ssize_t bad_file_read(struct file *filp, char __user *buf,
+ size_t size, loff_t *ppos)
+{
+ return -EIO;
+}
+
+static ssize_t bad_file_write(struct file *filp, const char __user *buf,
+ size_t siz, loff_t *ppos)
{
- return vfs_follow_link(nd, ERR_PTR(-EIO));
+ return -EIO;
}
-static int return_EIO(void)
+static ssize_t bad_file_aio_read(struct kiocb *iocb, const struct iovec *iov,
+ unsigned long nr_segs, loff_t pos)
{
return -EIO;
}
-#define EIO_ERROR ((void *) (return_EIO))
+static ssize_t bad_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
+ unsigned long nr_segs, loff_t pos)
+{
+ return -EIO;
+}
+
+static int bad_file_readdir(struct file *filp, void *dirent, filldir_t filldir)
+{
+ return -EIO;
+}
+
+static unsigned int bad_file_poll(struct file *filp, poll_table *wait)
+{
+ return POLLERR;
+}
+
+static long bad_file_unlocked_ioctl(struct file *file, unsigned cmd,
+ unsigned long arg)
+{
+ return -EIO;
+}
+
+static long bad_file_compat_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ return -EIO;
+}
+
+static int bad_file_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ return -EIO;
+}
+
+static int bad_file_open(struct inode *inode, struct file *filp)
+{
+ return -EIO;
+}
+
+static int bad_file_flush(struct file *file, fl_owner_t id)
+{
+ return -EIO;
+}
+
+static int bad_file_release(struct inode *inode, struct file *filp)
+{
+ return -EIO;
+}
+
+static int bad_file_fsync(struct file *file, loff_t start, loff_t end,
+ int datasync)
+{
+ return -EIO;
+}
+
+static int bad_file_aio_fsync(struct kiocb *iocb, int datasync)
+{
+ return -EIO;
+}
+
+static int bad_file_fasync(int fd, struct file *filp, int on)
+{
+ return -EIO;
+}
+
+static int bad_file_lock(struct file *file, int cmd, struct file_lock *fl)
+{
+ return -EIO;
+}
+
+static ssize_t bad_file_sendpage(struct file *file, struct page *page,
+ int off, size_t len, loff_t *pos, int more)
+{
+ return -EIO;
+}
+
+static unsigned long bad_file_get_unmapped_area(struct file *file,
+ unsigned long addr, unsigned long len,
+ unsigned long pgoff, unsigned long flags)
+{
+ return -EIO;
+}
+
+static int bad_file_check_flags(int flags)
+{
+ return -EIO;
+}
+
+static int bad_file_flock(struct file *filp, int cmd, struct file_lock *fl)
+{
+ return -EIO;
+}
+
+static ssize_t bad_file_splice_write(struct pipe_inode_info *pipe,
+ struct file *out, loff_t *ppos, size_t len,
+ unsigned int flags)
+{
+ return -EIO;
+}
-static struct file_operations bad_file_ops =
+static ssize_t bad_file_splice_read(struct file *in, loff_t *ppos,
+ struct pipe_inode_info *pipe, size_t len,
+ unsigned int flags)
{
- llseek: EIO_ERROR,
- read: EIO_ERROR,
- write: EIO_ERROR,
- readdir: EIO_ERROR,
- poll: EIO_ERROR,
- ioctl: EIO_ERROR,
- mmap: EIO_ERROR,
- open: EIO_ERROR,
- flush: EIO_ERROR,
- release: EIO_ERROR,
- fsync: EIO_ERROR,
- fasync: EIO_ERROR,
- lock: EIO_ERROR,
+ return -EIO;
+}
+
+static const struct file_operations bad_file_ops =
+{
+ .llseek = bad_file_llseek,
+ .read = bad_file_read,
+ .write = bad_file_write,
+ .aio_read = bad_file_aio_read,
+ .aio_write = bad_file_aio_write,
+ .readdir = bad_file_readdir,
+ .poll = bad_file_poll,
+ .unlocked_ioctl = bad_file_unlocked_ioctl,
+ .compat_ioctl = bad_file_compat_ioctl,
+ .mmap = bad_file_mmap,
+ .open = bad_file_open,
+ .flush = bad_file_flush,
+ .release = bad_file_release,
+ .fsync = bad_file_fsync,
+ .aio_fsync = bad_file_aio_fsync,
+ .fasync = bad_file_fasync,
+ .lock = bad_file_lock,
+ .sendpage = bad_file_sendpage,
+ .get_unmapped_area = bad_file_get_unmapped_area,
+ .check_flags = bad_file_check_flags,
+ .flock = bad_file_flock,
+ .splice_write = bad_file_splice_write,
+ .splice_read = bad_file_splice_read,
};
-struct inode_operations bad_inode_ops =
-{
- create: EIO_ERROR,
- lookup: EIO_ERROR,
- link: EIO_ERROR,
- unlink: EIO_ERROR,
- symlink: EIO_ERROR,
- mkdir: EIO_ERROR,
- rmdir: EIO_ERROR,
- mknod: EIO_ERROR,
- rename: EIO_ERROR,
- readlink: EIO_ERROR,
- follow_link: bad_follow_link,
- truncate: EIO_ERROR,
- permission: EIO_ERROR,
- revalidate: EIO_ERROR,
+static int bad_inode_create (struct inode *dir, struct dentry *dentry,
+ umode_t mode, struct nameidata *nd)
+{
+ return -EIO;
+}
+
+static struct dentry *bad_inode_lookup(struct inode *dir,
+ struct dentry *dentry, struct nameidata *nd)
+{
+ return ERR_PTR(-EIO);
+}
+
+static int bad_inode_link (struct dentry *old_dentry, struct inode *dir,
+ struct dentry *dentry)
+{
+ return -EIO;
+}
+
+static int bad_inode_unlink(struct inode *dir, struct dentry *dentry)
+{
+ return -EIO;
+}
+
+static int bad_inode_symlink (struct inode *dir, struct dentry *dentry,
+ const char *symname)
+{
+ return -EIO;
+}
+
+static int bad_inode_mkdir(struct inode *dir, struct dentry *dentry,
+ umode_t mode)
+{
+ return -EIO;
+}
+
+static int bad_inode_rmdir (struct inode *dir, struct dentry *dentry)
+{
+ return -EIO;
+}
+
+static int bad_inode_mknod (struct inode *dir, struct dentry *dentry,
+ umode_t mode, dev_t rdev)
+{
+ return -EIO;
+}
+
+static int bad_inode_rename (struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry)
+{
+ return -EIO;
+}
+
+static int bad_inode_readlink(struct dentry *dentry, char __user *buffer,
+ int buflen)
+{
+ return -EIO;
+}
+
+static int bad_inode_permission(struct inode *inode, int mask)
+{
+ return -EIO;
+}
+
+static int bad_inode_getattr(struct vfsmount *mnt, struct dentry *dentry,
+ struct kstat *stat)
+{
+ return -EIO;
+}
+
+static int bad_inode_setattr(struct dentry *direntry, struct iattr *attrs)
+{
+ return -EIO;
+}
+
+static int bad_inode_setxattr(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags)
+{
+ return -EIO;
+}
+
+static ssize_t bad_inode_getxattr(struct dentry *dentry, const char *name,
+ void *buffer, size_t size)
+{
+ return -EIO;
+}
+
+static ssize_t bad_inode_listxattr(struct dentry *dentry, char *buffer,
+ size_t buffer_size)
+{
+ return -EIO;
+}
+
+static int bad_inode_removexattr(struct dentry *dentry, const char *name)
+{
+ return -EIO;
+}
+
+static const struct inode_operations bad_inode_ops =
+{
+ .create = bad_inode_create,
+ .lookup = bad_inode_lookup,
+ .link = bad_inode_link,
+ .unlink = bad_inode_unlink,
+ .symlink = bad_inode_symlink,
+ .mkdir = bad_inode_mkdir,
+ .rmdir = bad_inode_rmdir,
+ .mknod = bad_inode_mknod,
+ .rename = bad_inode_rename,
+ .readlink = bad_inode_readlink,
+ /* follow_link must be no-op, otherwise unmounting this inode
+ won't work */
+ /* put_link returns void */
+ /* truncate returns void */
+ .permission = bad_inode_permission,
+ .getattr = bad_inode_getattr,
+ .setattr = bad_inode_setattr,
+ .setxattr = bad_inode_setxattr,
+ .getxattr = bad_inode_getxattr,
+ .listxattr = bad_inode_listxattr,
+ .removexattr = bad_inode_removexattr,
+ /* truncate_range returns void */
};
* on it to fail from this point on.
*/
-void make_bad_inode(struct inode * inode)
+void make_bad_inode(struct inode *inode)
{
+ remove_inode_hash(inode);
+
inode->i_mode = S_IFREG;
- inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+ inode->i_atime = inode->i_mtime = inode->i_ctime =
+ current_fs_time(inode->i_sb);
inode->i_op = &bad_inode_ops;
inode->i_fop = &bad_file_ops;
}
+EXPORT_SYMBOL(make_bad_inode);
/*
* This tests whether an inode has been flagged as bad. The test uses
* Returns true if the inode in question has been marked as bad.
*/
-int is_bad_inode(struct inode * inode)
+int is_bad_inode(struct inode *inode)
{
return (inode->i_op == &bad_inode_ops);
}
+
+EXPORT_SYMBOL(is_bad_inode);
+
+/**
+ * iget_failed - Mark an under-construction inode as dead and release it
+ * @inode: The inode to discard
+ *
+ * Mark an under-construction inode as dead and release it.
+ */
+void iget_failed(struct inode *inode)
+{
+ make_bad_inode(inode);
+ unlock_new_inode(inode);
+ iput(inode);
+}
+EXPORT_SYMBOL(iget_failed);
projects / linux-flexiantxendom0-3.2.10.git / blobdiff