forked from luck/tmp_suning_uos_patched
5ca2960733
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: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
/*
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* efs_fs.h
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*
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* Copyright (c) 1999 Al Smith
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*
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* Portions derived from work (c) 1995,1996 Christian Vogelgsang.
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*/
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#ifndef __EFS_FS_H__
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#define __EFS_FS_H__
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#define EFS_VERSION "1.0a"
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static const char cprt[] = "EFS: "EFS_VERSION" - (c) 1999 Al Smith <Al.Smith@aeschi.ch.eu.org>";
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#include <asm/uaccess.h>
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/* 1 block is 512 bytes */
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#define EFS_BLOCKSIZE_BITS 9
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#define EFS_BLOCKSIZE (1 << EFS_BLOCKSIZE_BITS)
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#include <linux/fs.h>
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#include <linux/efs_fs_i.h>
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#include <linux/efs_fs_sb.h>
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#include <linux/efs_dir.h>
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static inline struct efs_inode_info *INODE_INFO(struct inode *inode)
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{
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return container_of(inode, struct efs_inode_info, vfs_inode);
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}
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static inline struct efs_sb_info *SUPER_INFO(struct super_block *sb)
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{
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return sb->s_fs_info;
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}
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struct statfs;
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extern const struct inode_operations efs_dir_inode_operations;
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extern const struct file_operations efs_dir_operations;
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extern const struct address_space_operations efs_symlink_aops;
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extern void efs_read_inode(struct inode *);
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extern efs_block_t efs_map_block(struct inode *, efs_block_t);
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extern int efs_get_block(struct inode *, sector_t, struct buffer_head *, int);
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extern struct dentry *efs_lookup(struct inode *, struct dentry *, struct nameidata *);
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extern struct dentry *efs_get_dentry(struct super_block *sb, void *vobjp);
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extern struct dentry *efs_get_parent(struct dentry *);
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extern int efs_bmap(struct inode *, int);
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#endif /* __EFS_FS_H__ */
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