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}

 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{
30	__be32		nfserr;
 
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
39	nfserr = nfsd_open(rqstp, &fh, S_IFREG, NFSD_MAY_LOCK, filp);
 
 
 
 
 
 
 
 
 
 
 
40	fh_put(&fh);
41 	/* We return nlm error codes as nlm doesn't know
42	 * about nfsd, but nfsd does know about nlm..
43	 */
44	switch (nfserr) {
45	case nfs_ok:
46		return 0;
47	case nfserr_dropit:
48		return nlm_drop_reply;
49	case nfserr_stale:
50		return nlm_stale_fh;
51	default:
52		return nlm_failed;
53	}
54}
55
56static void
57nlm_fclose(struct file *filp)
58{
59	fput(filp);
60}
61
62static const struct nlmsvc_binding nfsd_nlm_ops = {
63	.fopen		= nlm_fopen,		/* open file for locking */
64	.fclose		= nlm_fclose,		/* close file */
65};
66
67void
68nfsd_lockd_init(void)
69{
70	dprintk("nfsd: initializing lockd\n");
71	nlmsvc_ops = &nfsd_nlm_ops;
72}
73
74void
75nfsd_lockd_shutdown(void)
76{
77	nlmsvc_ops = NULL;
78}