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 | */ |
27 | static __be32 |
28 | nlm_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(fhp: &fh,maxsize: 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 | |
60 | static void |
61 | nlm_fclose(struct file *filp) |
62 | { |
63 | fput(filp); |
64 | } |
65 | |
66 | static const struct nlmsvc_binding nfsd_nlm_ops = { |
67 | .fopen = nlm_fopen, /* open file for locking */ |
68 | .fclose = nlm_fclose, /* close file */ |
69 | }; |
70 | |
71 | void |
72 | nfsd_lockd_init(void) |
73 | { |
74 | dprintk("nfsd: initializing lockd\n" ); |
75 | nlmsvc_ops = &nfsd_nlm_ops; |
76 | } |
77 | |
78 | void |
79 | nfsd_lockd_shutdown(void) |
80 | { |
81 | nlmsvc_ops = NULL; |
82 | } |
83 | |