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 20 #define NFSDDBG_FACILITY NFSDDBG_LOCKD 21 22 #ifdef CONFIG_LOCKD_V4 23 #define nlm_stale_fh nlm4_stale_fh 24 #define nlm_failed nlm4_failed 25 #else 26 #define nlm_stale_fh nlm_lck_denied_nolocks 27 #define nlm_failed nlm_lck_denied_nolocks 28 #endif 29 /* 30 * Note: we hold the dentry use count while the file is open. 31 */ 32 static __be32 33 nlm_fopen(struct svc_rqst *rqstp, struct nfs_fh *f, struct file **filp) 34 { 35 __be32 nfserr; 36 struct svc_fh fh; 37 38 /* must initialize before using! but maxsize doesn't matter */ 39 fh_init(&fh,0); 40 fh.fh_handle.fh_size = f->size; 41 memcpy((char*)&fh.fh_handle.fh_base, f->data, f->size); 42 fh.fh_export = NULL; 43 44 exp_readlock(); 45 nfserr = nfsd_open(rqstp, &fh, S_IFREG, NFSD_MAY_LOCK, filp); 46 fh_put(&fh); 47 rqstp->rq_client = NULL; 48 exp_readunlock(); 49 /* We return nlm error codes as nlm doesn't know 50 * about nfsd, but nfsd does know about nlm.. 51 */ 52 switch (nfserr) { 53 case nfs_ok: 54 return 0; 55 case nfserr_dropit: 56 return nlm_drop_reply; 57 case nfserr_stale: 58 return nlm_stale_fh; 59 default: 60 return nlm_failed; 61 } 62 } 63 64 static void 65 nlm_fclose(struct file *filp) 66 { 67 fput(filp); 68 } 69 70 static struct nlmsvc_binding nfsd_nlm_ops = { 71 .fopen = nlm_fopen, /* open file for locking */ 72 .fclose = nlm_fclose, /* close file */ 73 }; 74 75 void 76 nfsd_lockd_init(void) 77 { 78 dprintk("nfsd: initializing lockd\n"); 79 nlmsvc_ops = &nfsd_nlm_ops; 80 } 81 82 void 83 nfsd_lockd_shutdown(void) 84 { 85 nlmsvc_ops = NULL; 86 } 87