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 nfserr = nfsd_open(rqstp, &fh, S_IFREG, NFSD_MAY_LOCK, filp); 39 fh_put(&fh); 40 /* We return nlm error codes as nlm doesn't know 41 * about nfsd, but nfsd does know about nlm.. 42 */ 43 switch (nfserr) { 44 case nfs_ok: 45 return 0; 46 case nfserr_dropit: 47 return nlm_drop_reply; 48 case nfserr_stale: 49 return nlm_stale_fh; 50 default: 51 return nlm_failed; 52 } 53 } 54 55 static void 56 nlm_fclose(struct file *filp) 57 { 58 fput(filp); 59 } 60 61 static const struct nlmsvc_binding nfsd_nlm_ops = { 62 .fopen = nlm_fopen, /* open file for locking */ 63 .fclose = nlm_fclose, /* close file */ 64 }; 65 66 void 67 nfsd_lockd_init(void) 68 { 69 dprintk("nfsd: initializing lockd\n"); 70 nlmsvc_ops = &nfsd_nlm_ops; 71 } 72 73 void 74 nfsd_lockd_shutdown(void) 75 { 76 nlmsvc_ops = NULL; 77 } 78