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

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 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
10#include <linux/file.h>
11#include <linux/lockd/bind.h>
12#include "nfsd.h"
13#include "vfs.h"
14
15#define NFSDDBG_FACILITY		NFSDDBG_LOCKD
16
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
24/*
25 * Note: we hold the dentry use count while the file is open.
26 */
27static __be32
28nlm_fopen(struct svc_rqst *rqstp, struct nfs_fh *f, struct file **filp,
29		int mode)
30{
31	__be32		nfserr;
32	int		access;
33	struct svc_fh	fh;
34
35	/* must initialize before using! but maxsize doesn't matter */
36	fh_init(&fh,0);
37	fh.fh_handle.fh_size = f->size;
38	memcpy(&fh.fh_handle.fh_raw, f->data, f->size);
39	fh.fh_export = NULL;
40
41	/*
42	 * Allow BYPASS_GSS as some client implementations use AUTH_SYS
43	 * for NLM even when GSS is used for NFS.
44	 * Allow OWNER_OVERRIDE as permission might have been changed
45	 * after the file was opened.
46	 * Pass MAY_NLM so that authentication can be completely bypassed
47	 * if NFSEXP_NOAUTHNLM is set.  Some older clients use AUTH_NULL
48	 * for NLM requests.
49	 */
50	access = (mode == O_WRONLY) ? NFSD_MAY_WRITE : NFSD_MAY_READ;
51	access |= NFSD_MAY_NLM | NFSD_MAY_OWNER_OVERRIDE | NFSD_MAY_BYPASS_GSS;
52	nfserr = nfsd_open(rqstp, &fh, S_IFREG, access, filp);
53	fh_put(&fh);
54	/* We return nlm error codes as nlm doesn't know
55	 * about nfsd, but nfsd does know about nlm..
56	 */
57	switch (nfserr) {
58	case nfs_ok:
59		return 0;
60	case nfserr_dropit:
61		return nlm_drop_reply;
62	case nfserr_stale:
63		return nlm_stale_fh;
64	default:
65		return nlm_failed;
66	}
67}
68
69static void
70nlm_fclose(struct file *filp)
71{
72	fput(filp);
73}
74
75static const struct nlmsvc_binding nfsd_nlm_ops = {
76	.fopen		= nlm_fopen,		/* open file for locking */
77	.fclose		= nlm_fclose,		/* close file */
78};
79
80void
81nfsd_lockd_init(void)
82{
83	dprintk("nfsd: initializing lockd\n");
84	nlmsvc_ops = &nfsd_nlm_ops;
85}
86
87void
88nfsd_lockd_shutdown(void)
89{
90	nlmsvc_ops = NULL;
91}