Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * This file contains all the stubs needed when communicating with lockd. |
| 4 | * This level of indirection is necessary so we can run nfsd+lockd without |
| 5 | * requiring the nfs client to be compiled in/loaded, and vice versa. |
| 6 | * |
| 7 | * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de> |
| 8 | */ |
| 9 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | #include <linux/file.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <linux/lockd/bind.h> |
Boaz Harrosh | 9a74af2 | 2009-12-03 20:30:56 +0200 | [diff] [blame] | 12 | #include "nfsd.h" |
J. Bruce Fields | 0a3adad | 2009-11-04 18:12:35 -0500 | [diff] [blame] | 13 | #include "vfs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | |
| 15 | #define NFSDDBG_FACILITY NFSDDBG_LOCKD |
| 16 | |
Miklos Szeredi | cc77b15 | 2008-07-25 01:48:55 -0700 | [diff] [blame] | 17 | #ifdef CONFIG_LOCKD_V4 |
| 18 | #define nlm_stale_fh nlm4_stale_fh |
| 19 | #define nlm_failed nlm4_failed |
| 20 | #else |
| 21 | #define nlm_stale_fh nlm_lck_denied_nolocks |
| 22 | #define nlm_failed nlm_lck_denied_nolocks |
| 23 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | /* |
| 25 | * Note: we hold the dentry use count while the file is open. |
| 26 | */ |
Al Viro | e8c5c04 | 2006-12-13 00:35:03 -0800 | [diff] [blame] | 27 | static __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | nlm_fopen(struct svc_rqst *rqstp, struct nfs_fh *f, struct file **filp) |
| 29 | { |
Al Viro | c7afef1 | 2006-10-19 23:29:02 -0700 | [diff] [blame] | 30 | __be32 nfserr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | struct svc_fh fh; |
| 32 | |
| 33 | /* must initialize before using! but maxsize doesn't matter */ |
| 34 | fh_init(&fh,0); |
| 35 | fh.fh_handle.fh_size = f->size; |
| 36 | memcpy((char*)&fh.fh_handle.fh_base, f->data, f->size); |
| 37 | fh.fh_export = NULL; |
| 38 | |
Miklos Szeredi | 8837abc | 2008-06-16 13:20:29 +0200 | [diff] [blame] | 39 | nfserr = nfsd_open(rqstp, &fh, S_IFREG, NFSD_MAY_LOCK, filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | fh_put(&fh); |
NeilBrown | d343fce | 2006-10-17 00:10:18 -0700 | [diff] [blame] | 41 | /* We return nlm error codes as nlm doesn't know |
| 42 | * about nfsd, but nfsd does know about nlm.. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | */ |
| 44 | switch (nfserr) { |
| 45 | case nfs_ok: |
| 46 | return 0; |
NeilBrown | d343fce | 2006-10-17 00:10:18 -0700 | [diff] [blame] | 47 | case nfserr_dropit: |
| 48 | return nlm_drop_reply; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | case nfserr_stale: |
Miklos Szeredi | cc77b15 | 2008-07-25 01:48:55 -0700 | [diff] [blame] | 50 | return nlm_stale_fh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | default: |
Miklos Szeredi | cc77b15 | 2008-07-25 01:48:55 -0700 | [diff] [blame] | 52 | return nlm_failed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | } |
| 54 | } |
| 55 | |
| 56 | static void |
| 57 | nlm_fclose(struct file *filp) |
| 58 | { |
| 59 | fput(filp); |
| 60 | } |
| 61 | |
Julia Lawall | 2a29745 | 2015-12-23 22:25:13 +0100 | [diff] [blame] | 62 | static const struct nlmsvc_binding nfsd_nlm_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | .fopen = nlm_fopen, /* open file for locking */ |
| 64 | .fclose = nlm_fclose, /* close file */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | }; |
| 66 | |
| 67 | void |
| 68 | nfsd_lockd_init(void) |
| 69 | { |
| 70 | dprintk("nfsd: initializing lockd\n"); |
| 71 | nlmsvc_ops = &nfsd_nlm_ops; |
| 72 | } |
| 73 | |
| 74 | void |
| 75 | nfsd_lockd_shutdown(void) |
| 76 | { |
| 77 | nlmsvc_ops = NULL; |
| 78 | } |