Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
1da177e4 LT |
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 | ||
1da177e4 | 10 | #include <linux/file.h> |
1da177e4 | 11 | #include <linux/lockd/bind.h> |
9a74af21 | 12 | #include "nfsd.h" |
0a3adade | 13 | #include "vfs.h" |
1da177e4 LT |
14 | |
15 | #define NFSDDBG_FACILITY NFSDDBG_LOCKD | |
16 | ||
cc77b152 MS |
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 | |
1da177e4 LT |
24 | /* |
25 | * Note: we hold the dentry use count while the file is open. | |
26 | */ | |
e8c5c045 | 27 | static __be32 |
7f024fcd BF |
28 | nlm_fopen(struct svc_rqst *rqstp, struct nfs_fh *f, struct file **filp, |
29 | int mode) | |
1da177e4 | 30 | { |
c7afef1f | 31 | __be32 nfserr; |
7f024fcd | 32 | int access; |
1da177e4 LT |
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; | |
d8b26071 | 38 | memcpy(&fh.fh_handle.fh_raw, f->data, f->size); |
1da177e4 LT |
39 | fh.fh_export = NULL; |
40 | ||
7f024fcd BF |
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); | |
1da177e4 | 44 | fh_put(&fh); |
d343fce1 N |
45 | /* We return nlm error codes as nlm doesn't know |
46 | * about nfsd, but nfsd does know about nlm.. | |
1da177e4 LT |
47 | */ |
48 | switch (nfserr) { | |
49 | case nfs_ok: | |
50 | return 0; | |
d343fce1 N |
51 | case nfserr_dropit: |
52 | return nlm_drop_reply; | |
1da177e4 | 53 | case nfserr_stale: |
cc77b152 | 54 | return nlm_stale_fh; |
1da177e4 | 55 | default: |
cc77b152 | 56 | return nlm_failed; |
1da177e4 LT |
57 | } |
58 | } | |
59 | ||
60 | static void | |
61 | nlm_fclose(struct file *filp) | |
62 | { | |
63 | fput(filp); | |
64 | } | |
65 | ||
2a297450 | 66 | static const struct nlmsvc_binding nfsd_nlm_ops = { |
1da177e4 LT |
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 | } |