1 /* 2 * linux/fs/nfsd/lockd.c 3 * 4 * This file contains all the stubs needed when communicating with lockd. 5 * This level of indirection is necessary so we can run nfsd+lockd without 6 * requiring the nfs client to be compiled in/loaded, and vice versa. 7 * 8 * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de> 9 */ 10 11 #include <linux/types.h> 12 #include <linux/fs.h> 13 #include <linux/file.h> 14 #include <linux/mount.h> 15 #include <linux/sunrpc/clnt.h> 16 #include <linux/sunrpc/svc.h> 17 #include <linux/nfsd/nfsd.h> 18 #include <linux/lockd/bind.h> 19 #include "vfs.h" 20 21 #define NFSDDBG_FACILITY NFSDDBG_LOCKD 22 23 #ifdef CONFIG_LOCKD_V4 24 #define nlm_stale_fh nlm4_stale_fh 25 #define nlm_failed nlm4_failed 26 #else 27 #define nlm_stale_fh nlm_lck_denied_nolocks 28 #define nlm_failed nlm_lck_denied_nolocks 29 #endif 30 /* 31 * Note: we hold the dentry use count while the file is open. 32 */ 33 static __be32 34 nlm_fopen(struct svc_rqst *rqstp, struct nfs_fh *f, struct file **filp) 35 { 36 __be32 nfserr; 37 struct svc_fh fh; 38 39 /* must initialize before using! but maxsize doesn't matter */ 40 fh_init(&fh,0); 41 fh.fh_handle.fh_size = f->size; 42 memcpy((char*)&fh.fh_handle.fh_base, f->data, f->size); 43 fh.fh_export = NULL; 44 45 exp_readlock(); 46 nfserr = nfsd_open(rqstp, &fh, S_IFREG, NFSD_MAY_LOCK, filp); 47 fh_put(&fh); 48 rqstp->rq_client = NULL; 49 exp_readunlock(); 50 /* We return nlm error codes as nlm doesn't know 51 * about nfsd, but nfsd does know about nlm.. 52 */ 53 switch (nfserr) { 54 case nfs_ok: 55 return 0; 56 case nfserr_dropit: 57 return nlm_drop_reply; 58 case nfserr_stale: 59 return nlm_stale_fh; 60 default: 61 return nlm_failed; 62 } 63 } 64 65 static void 66 nlm_fclose(struct file *filp) 67 { 68 fput(filp); 69 } 70 71 static struct nlmsvc_binding nfsd_nlm_ops = { 72 .fopen = nlm_fopen, /* open file for locking */ 73 .fclose = nlm_fclose, /* close file */ 74 }; 75 76 void 77 nfsd_lockd_init(void) 78 { 79 dprintk("nfsd: initializing lockd\n"); 80 nlmsvc_ops = &nfsd_nlm_ops; 81 } 82 83 void 84 nfsd_lockd_shutdown(void) 85 { 86 nlmsvc_ops = NULL; 87 } 88