Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | #include <linux/file.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <linux/lockd/bind.h> |
Boaz Harrosh | 9a74af2 | 2009-12-03 20:30:56 +0200 | [diff] [blame] | 12 | #include "nfsd.h" |
J. Bruce Fields | 0a3adad | 2009-11-04 18:12:35 -0500 | [diff] [blame] | 13 | #include "vfs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | |
| 15 | #define NFSDDBG_FACILITY NFSDDBG_LOCKD |
| 16 | |
Miklos Szeredi | cc77b15 | 2008-07-25 01:48:55 -0700 | [diff] [blame] | 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 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | /* |
| 25 | * Note: we hold the dentry use count while the file is open. |
| 26 | */ |
Al Viro | e8c5c04 | 2006-12-13 00:35:03 -0800 | [diff] [blame] | 27 | static __be32 |
J. Bruce Fields | 7f024fc | 2021-08-23 16:44:00 -0400 | [diff] [blame] | 28 | nlm_fopen(struct svc_rqst *rqstp, struct nfs_fh *f, struct file **filp, |
| 29 | int mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | { |
Al Viro | c7afef1 | 2006-10-19 23:29:02 -0700 | [diff] [blame] | 31 | __be32 nfserr; |
J. Bruce Fields | 7f024fc | 2021-08-23 16:44:00 -0400 | [diff] [blame] | 32 | int access; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
NeilBrown | d8b2607 | 2021-09-02 11:16:32 +1000 | [diff] [blame] | 38 | memcpy(&fh.fh_handle.fh_raw, f->data, f->size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | fh.fh_export = NULL; |
| 40 | |
J. Bruce Fields | 7f024fc | 2021-08-23 16:44:00 -0400 | [diff] [blame] | 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); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | fh_put(&fh); |
NeilBrown | d343fce | 2006-10-17 00:10:18 -0700 | [diff] [blame] | 45 | /* We return nlm error codes as nlm doesn't know |
| 46 | * about nfsd, but nfsd does know about nlm.. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | */ |
| 48 | switch (nfserr) { |
| 49 | case nfs_ok: |
| 50 | return 0; |
NeilBrown | d343fce | 2006-10-17 00:10:18 -0700 | [diff] [blame] | 51 | case nfserr_dropit: |
| 52 | return nlm_drop_reply; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | case nfserr_stale: |
Miklos Szeredi | cc77b15 | 2008-07-25 01:48:55 -0700 | [diff] [blame] | 54 | return nlm_stale_fh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | default: |
Miklos Szeredi | cc77b15 | 2008-07-25 01:48:55 -0700 | [diff] [blame] | 56 | return nlm_failed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | } |
| 58 | } |
| 59 | |
| 60 | static void |
| 61 | nlm_fclose(struct file *filp) |
| 62 | { |
| 63 | fput(filp); |
| 64 | } |
| 65 | |
Julia Lawall | 2a29745 | 2015-12-23 22:25:13 +0100 | [diff] [blame] | 66 | static const struct nlmsvc_binding nfsd_nlm_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | .fopen = nlm_fopen, /* open file for locking */ |
| 68 | .fclose = nlm_fclose, /* close file */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | } |