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e21fc2038c
Rename the default helper for encoding FILEID_INO32_GEN* file handles to generic_encode_ino32_fh() and convert the filesystems that used the default implementation to use the generic helper explicitly. After this change, exportfs_encode_inode_fh() no longer has a default implementation to encode FILEID_INO32_GEN* file handles. This is a step towards allowing filesystems to encode non-decodeable file handles for fanotify without having to implement any export_operations. Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Jeff Layton <jlayton@kernel.org> Acked-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Amir Goldstein <amir73il@gmail.com> Link: https://lore.kernel.org/r/20231023180801.2953446-3-amir73il@gmail.com Acked-by: Dave Kleikamp <dave.kleikamp@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Christian Brauner <brauner@kernel.org>
54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
// SPDX-License-Identifier: LGPL-2.1
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/*
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*
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* Copyright (C) International Business Machines Corp., 2007
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* Author(s): Steve French (sfrench@us.ibm.com)
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*
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* Common Internet FileSystem (CIFS) client
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*
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* Operations related to support for exporting files via NFSD
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*
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*/
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/*
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* See Documentation/filesystems/nfs/exporting.rst
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* and examples in fs/exportfs
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*
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* Since cifs is a network file system, an "fsid" must be included for
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* any nfs exports file entries which refer to cifs paths. In addition
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* the cifs mount must be mounted with the "serverino" option (ie use stable
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* server inode numbers instead of locally generated temporary ones).
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* Although cifs inodes do not use generation numbers (have generation number
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* of zero) - the inode number alone should be good enough for simple cases
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* in which users want to export cifs shares with NFS. The decode and encode
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* could be improved by using a new routine which expects 64 bit inode numbers
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* instead of the default 32 bit routines in fs/exportfs
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*
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*/
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#include <linux/fs.h>
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#include <linux/exportfs.h>
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#include "cifsglob.h"
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#include "cifs_debug.h"
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#include "cifsfs.h"
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#ifdef CONFIG_CIFS_NFSD_EXPORT
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static struct dentry *cifs_get_parent(struct dentry *dentry)
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{
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/* BB need to add code here eventually to enable export via NFSD */
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cifs_dbg(FYI, "get parent for %p\n", dentry);
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return ERR_PTR(-EACCES);
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}
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const struct export_operations cifs_export_ops = {
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.encode_fh = generic_encode_ino32_fh,
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.get_parent = cifs_get_parent,
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/*
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* Following export operations are mandatory for NFS export support:
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* .fh_to_dentry =
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*/
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};
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#endif /* CONFIG_CIFS_NFSD_EXPORT */
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