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