| // SPDX-License-Identifier: GPL-2.0 | |
| /* | |
| * Copyright (c) 2005 Silicon Graphics, Inc. | |
| * All Rights Reserved. | |
| */ | |
| #ifndef __XFS_EXPORT_H__ | |
| #define __XFS_EXPORT_H__ | |
| /* | |
| * Common defines for code related to exporting XFS filesystems over NFS. | |
| * | |
| * The NFS fileid goes out on the wire as an array of | |
| * 32bit unsigned ints in host order. There are 5 possible | |
| * formats. | |
| * | |
| * (1) fileid_type=0x00 | |
| * (no fileid data; handled by the generic code) | |
| * | |
| * (2) fileid_type=0x01 | |
| * inode-num | |
| * generation | |
| * | |
| * (3) fileid_type=0x02 | |
| * inode-num | |
| * generation | |
| * parent-inode-num | |
| * parent-generation | |
| * | |
| * (4) fileid_type=0x81 | |
| * inode-num-lo32 | |
| * inode-num-hi32 | |
| * generation | |
| * | |
| * (5) fileid_type=0x82 | |
| * inode-num-lo32 | |
| * inode-num-hi32 | |
| * generation | |
| * parent-inode-num-lo32 | |
| * parent-inode-num-hi32 | |
| * parent-generation | |
| * | |
| * Note, the NFS filehandle also includes an fsid portion which | |
| * may have an inode number in it. That number is hardcoded to | |
| * 32bits and there is no way for XFS to intercept it. In | |
| * practice this means when exporting an XFS filesystem with 64bit | |
| * inodes you should either export the mountpoint (rather than | |
| * a subdirectory) or use the "fsid" export option. | |
| */ | |
| struct xfs_fid64 { | |
| u64 ino; | |
| u32 gen; | |
| u64 parent_ino; | |
| u32 parent_gen; | |
| } __attribute__((packed)); | |
| /* This flag goes on the wire. Don't play with it. */ | |
| #define XFS_FILEID_TYPE_64FLAG 0x80 /* NFS fileid has 64bit inodes */ | |
| struct inode *xfs_nfs_get_inode(struct super_block *sb, u64 ino, u32 gen); | |
| #endif /* __XFS_EXPORT_H__ */ |