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