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 */
26 static __be32
nlm_fopen(struct svc_rqst * rqstp,struct nfs_fh * f,struct file ** filp)27 nlm_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
55 static void
nlm_fclose(struct file * filp)56 nlm_fclose(struct file *filp)
57 {
58 fput(filp);
59 }
60
61 static struct nlmsvc_binding nfsd_nlm_ops = {
62 .fopen = nlm_fopen, /* open file for locking */
63 .fclose = nlm_fclose, /* close file */
64 };
65
66 void
nfsd_lockd_init(void)67 nfsd_lockd_init(void)
68 {
69 dprintk("nfsd: initializing lockd\n");
70 nlmsvc_ops = &nfsd_nlm_ops;
71 }
72
73 void
nfsd_lockd_shutdown(void)74 nfsd_lockd_shutdown(void)
75 {
76 nlmsvc_ops = NULL;
77 }
78