forked from luck/tmp_suning_uos_patched
ee0b3e671b
This patch removes readv() and writev() methods and replaces them with aio_read()/aio_write() methods. Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
122 lines
2.8 KiB
C
122 lines
2.8 KiB
C
/*
|
|
* linux/fs/bad_inode.c
|
|
*
|
|
* 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/module.h>
|
|
#include <linux/stat.h>
|
|
#include <linux/time.h>
|
|
#include <linux/smp_lock.h>
|
|
#include <linux/namei.h>
|
|
|
|
static int return_EIO(void)
|
|
{
|
|
return -EIO;
|
|
}
|
|
|
|
#define EIO_ERROR ((void *) (return_EIO))
|
|
|
|
static const struct file_operations bad_file_ops =
|
|
{
|
|
.llseek = EIO_ERROR,
|
|
.aio_read = EIO_ERROR,
|
|
.read = EIO_ERROR,
|
|
.write = EIO_ERROR,
|
|
.aio_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,
|
|
.aio_fsync = EIO_ERROR,
|
|
.fasync = EIO_ERROR,
|
|
.lock = EIO_ERROR,
|
|
.sendfile = EIO_ERROR,
|
|
.sendpage = EIO_ERROR,
|
|
.get_unmapped_area = EIO_ERROR,
|
|
};
|
|
|
|
static 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 must be no-op, otherwise unmounting this inode
|
|
won't work */
|
|
.truncate = EIO_ERROR,
|
|
.permission = EIO_ERROR,
|
|
.getattr = EIO_ERROR,
|
|
.setattr = EIO_ERROR,
|
|
.setxattr = EIO_ERROR,
|
|
.getxattr = EIO_ERROR,
|
|
.listxattr = EIO_ERROR,
|
|
.removexattr = EIO_ERROR,
|
|
};
|
|
|
|
|
|
/*
|
|
* When a filesystem is unable to read an inode due to an I/O error in
|
|
* its read_inode() function, it can call make_bad_inode() to return a
|
|
* set of stubs which will return EIO errors as required.
|
|
*
|
|
* We only need to do limited initialisation: all other fields are
|
|
* preinitialised to zero automatically.
|
|
*/
|
|
|
|
/**
|
|
* make_bad_inode - mark an inode bad due to an I/O error
|
|
* @inode: Inode to mark bad
|
|
*
|
|
* When an inode cannot be read due to a media or remote network
|
|
* failure this function makes the inode "bad" and causes I/O operations
|
|
* on it to fail from this point on.
|
|
*/
|
|
|
|
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_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
|
|
* &bad_inode_ops to cover the case of invalidated inodes as well as
|
|
* those created by make_bad_inode() above.
|
|
*/
|
|
|
|
/**
|
|
* is_bad_inode - is an inode errored
|
|
* @inode: inode to test
|
|
*
|
|
* Returns true if the inode in question has been marked as bad.
|
|
*/
|
|
|
|
int is_bad_inode(struct inode * inode)
|
|
{
|
|
return (inode->i_op == &bad_inode_ops);
|
|
}
|
|
|
|
EXPORT_SYMBOL(is_bad_inode);
|