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/file.h> 12 #include <linux/nfsd/nfsd.h> 13 #include <linux/lockd/bind.h> 14 #include "vfs.h" 15 16 #define NFSDDBG_FACILITY NFSDDBG_LOCKD 17 18 #ifdef CONFIG_LOCKD_V4 19 #define nlm_stale_fh nlm4_stale_fh 20 #define nlm_failed nlm4_failed 21 #else 22 #define nlm_stale_fh nlm_lck_denied_nolocks 23 #define nlm_failed nlm_lck_denied_nolocks 24 #endif 25 /* 26 * Note: we hold the dentry use count while the file is open. 27 */ 28 static __be32 29 nlm_fopen(struct svc_rqst *rqstp, struct nfs_fh *f, struct file **filp) 30 { 31 __be32 nfserr; 32 struct svc_fh fh; 33 34 /* must initialize before using! but maxsize doesn't matter */ 35 fh_init(&fh,0); 36 fh.fh_handle.fh_size = f->size; 37 memcpy((char*)&fh.fh_handle.fh_base, f->data, f->size); 38 fh.fh_export = NULL; 39 40 exp_readlock(); 41 nfserr = nfsd_open(rqstp, &fh, S_IFREG, NFSD_MAY_LOCK, filp); 42 fh_put(&fh); 43 rqstp->rq_client = NULL; 44 exp_readunlock(); 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 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