projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1ae1bc44 SF |
1 | /* |
| 2 | * fs/cifs/export.c | |
| 3 | * | |
| 4 | * Copyright (C) International Business Machines Corp., 2007 | |
| 5 | * Author(s): Steve French (sfrench@us.ibm.com) | |
| 6 | * | |
| 7 | * Common Internet FileSystem (CIFS) client | |
| fb8c4b14 | 8 | * |
| 1ae1bc44 SF |
9 | * Operations related to support for exporting files via NFSD |
| 10 | * | |
| 11 | * This library is free software; you can redistribute it and/or modify | |
| 12 | * it under the terms of the GNU Lesser General Public License as published | |
| 13 | * by the Free Software Foundation; either version 2.1 of the License, or | |
| 14 | * (at your option) any later version. | |
| 15 | * | |
| 16 | * This library is distributed in the hope that it will be useful, | |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
| 19 | * the GNU Lesser General Public License for more details. | |
| 20 | * | |
| 21 | * You should have received a copy of the GNU Lesser General Public License | |
| 22 | * along with this library; if not, write to the Free Software | |
| 23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 24 | */ | |
| 50c2f753 | 25 | |
| fb8c4b14 | 26 | /* |
| dc7a0816 | 27 | * See Documentation/filesystems/nfs/Exporting |
| 1ae1bc44 | 28 | * and examples in fs/exportfs |
| 7521a3c5 SF |
29 | * |
| 30 | * Since cifs is a network file system, an "fsid" must be included for | |
| 31 | * any nfs exports file entries which refer to cifs paths. In addition | |
| 32 | * the cifs mount must be mounted with the "serverino" option (ie use stable | |
| 33 | * server inode numbers instead of locally generated temporary ones). | |
| 34 | * Although cifs inodes do not use generation numbers (have generation number | |
| 35 | * of zero) - the inode number alone should be good enough for simple cases | |
| 36 | * in which users want to export cifs shares with NFS. The decode and encode | |
| 37 | * could be improved by using a new routine which expects 64 bit inode numbers | |
| 38 | * instead of the default 32 bit routines in fs/exportfs | |
| 39 | * | |
| 1ae1bc44 SF |
40 | */ |
| 41 | ||
| 42 | #include <linux/fs.h> | |
| 70b315b0 | 43 | #include <linux/exportfs.h> |
| 7521a3c5 SF |
44 | #include "cifsglob.h" |
| 45 | #include "cifs_debug.h" | |
| 297647c2 | 46 | #include "cifsfs.h" |
| 7521a3c5 | 47 | |
| f3a6a60e | 48 | #ifdef CONFIG_CIFS_NFSD_EXPORT |
| 1ae1bc44 SF |
49 | static struct dentry *cifs_get_parent(struct dentry *dentry) |
| 50 | { | |
| fb8c4b14 | 51 | /* BB need to add code here eventually to enable export via NFSD */ |
| f96637be | 52 | cifs_dbg(FYI, "get parent for %p\n", dentry); |
| fb8c4b14 | 53 | return ERR_PTR(-EACCES); |
| 1ae1bc44 | 54 | } |
| 50c2f753 | 55 | |
| 39655164 | 56 | const struct export_operations cifs_export_ops = { |
| fb8c4b14 SF |
57 | .get_parent = cifs_get_parent, |
| 58 | /* Following five export operations are unneeded so far and can default: | |
| 59 | .get_dentry = | |
| 60 | .get_name = | |
| 61 | .find_exported_dentry = | |
| 62 | .decode_fh = | |
| 63 | .encode_fs = */ | |
| 64 | }; | |
| 50c2f753 | 65 | |
| f3a6a60e | 66 | #endif /* CONFIG_CIFS_NFSD_EXPORT */ |
| 50c2f753 | 67 |