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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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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>
47 lines
2.2 KiB
C
47 lines
2.2 KiB
C
/*
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* Copyright (C) International Business Machines Corp., 2000-2001
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _H_JFS_INODE
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#define _H_JFS_INODE
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extern struct inode *ialloc(struct inode *, umode_t);
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extern int jfs_fsync(struct file *, struct dentry *, int);
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extern int jfs_ioctl(struct inode *, struct file *,
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unsigned int, unsigned long);
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extern void jfs_read_inode(struct inode *);
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extern int jfs_commit_inode(struct inode *, int);
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extern int jfs_write_inode(struct inode*, int);
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extern void jfs_delete_inode(struct inode *);
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extern void jfs_dirty_inode(struct inode *);
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extern void jfs_truncate(struct inode *);
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extern void jfs_truncate_nolock(struct inode *, loff_t);
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extern void jfs_free_zero_link(struct inode *);
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extern struct dentry *jfs_get_parent(struct dentry *dentry);
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extern void jfs_get_inode_flags(struct jfs_inode_info *);
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extern struct dentry *jfs_get_dentry(struct super_block *sb, void *vobjp);
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extern void jfs_set_inode_flags(struct inode *);
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extern int jfs_get_block(struct inode *, sector_t, struct buffer_head *, int);
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extern const struct address_space_operations jfs_aops;
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extern const struct inode_operations jfs_dir_inode_operations;
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extern const struct file_operations jfs_dir_operations;
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extern const struct inode_operations jfs_file_inode_operations;
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extern const struct file_operations jfs_file_operations;
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extern const struct inode_operations jfs_symlink_inode_operations;
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extern struct dentry_operations jfs_ci_dentry_operations;
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#endif /* _H_JFS_INODE */
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