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		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	access = (mode == O_WRONLY) ? NFSD_MAY_WRITE : NFSD_MAY_READ;
42	access |= NFSD_MAY_LOCK;
43	nfserr = nfsd_open(rqstp, &fh, S_IFREG, access, filp);
44	fh_put(&fh);
45 	/* We return nlm error codes as nlm doesn't know
46	 * about nfsd, but nfsd does know about nlm..
47	 */
48	switch (nfserr) {
49	case nfs_ok:
50		return 0;
51	case nfserr_dropit:
52		return nlm_drop_reply;
53	case nfserr_stale:
54		return nlm_stale_fh;
55	default:
56		return nlm_failed;
57	}
58}
59
60static void
61nlm_fclose(struct file *filp)
62{
63	fput(filp);
64}
65
66static const struct nlmsvc_binding nfsd_nlm_ops = {
67	.fopen		= nlm_fopen,		/* open file for locking */
68	.fclose		= nlm_fclose,		/* close file */
69};
70
71void
72nfsd_lockd_init(void)
73{
74	dprintk("nfsd: initializing lockd\n");
75	nlmsvc_ops = &nfsd_nlm_ops;
76}
77
78void
79nfsd_lockd_shutdown(void)
80{
81	nlmsvc_ops = NULL;
82}