• Christoph Hellwig's avatar
    knfsd: exportfs: remove iget abuse · 5ca29607
    Christoph Hellwig authored
    
    When the exportfs interface was added the expectation was that filesystems
    provide an operation to convert from a file handle to an inode/dentry, but it
    kept a backwards compat option that still calls into iget.
    
    Calling into iget from non-filesystem code is very bad, because it gives too
    little information to filesystem, and simply crashes if the filesystem doesn't
    implement the ->read_inode routine.
    
    Fortunately there are only two filesystems left using this fallback: efs and
    jfs.  This patch moves a copy of export_iget to each of those to implement the
    get_dentry method.
    
    While this is a temporary increase of lines of code in the kernel it allows
    for a much cleaner interface and important code restructuring in later
    patches.
    
    [akpm@linux-foundation.org: add jfs_get_inode_flags() declaration]
    Signed-off-by: default avatarDave Kleikamp <shaggy@linux.vnet.ibm.com>
    Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
    Signed-off-by: default avatarNeil Brown <neilb@suse.de>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    5ca29607
jfs_inode.h 2.16 KB
/*
 *   Copyright (C) International Business Machines Corp., 2000-2001
 *
 *   This program is free software;  you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 *   the GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program;  if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
#ifndef	_H_JFS_INODE
#define _H_JFS_INODE

extern struct inode *ialloc(struct inode *, umode_t);
extern int jfs_fsync(struct file *, struct dentry *, int);
extern int jfs_ioctl(struct inode *, struct file *,
			unsigned int, unsigned long);
extern void jfs_read_inode(struct inode *);
extern int jfs_commit_inode(struct inode *, int);
extern int jfs_write_inode(struct inode*, int);
extern void jfs_delete_inode(struct inode *);
extern void jfs_dirty_inode(struct inode *);
extern void jfs_truncate(struct inode *);
extern void jfs_truncate_nolock(struct inode *, loff_t);
extern void jfs_free_zero_link(struct inode *);
extern struct dentry *jfs_get_parent(struct dentry *dentry);
extern void jfs_get_inode_flags(struct jfs_inode_info *);
extern struct dentry *jfs_get_dentry(struct super_block *sb, void *vobjp);
extern void jfs_set_inode_flags(struct inode *);
extern int jfs_get_block(struct inode *, sector_t, struct buffer_head *, int);

extern const struct address_space_operations jfs_aops;
extern const struct inode_operations jfs_dir_inode_operations;
extern const struct file_operations jfs_dir_operations;
extern const struct inode_operations jfs_file_inode_operations;
extern const struct file_operations jfs_file_operations;
extern const struct inode_operations jfs_symlink_inode_operations;
extern struct dentry_operations jfs_ci_dentry_operations;
#endif				/* _H_JFS_INODE */