/* * linux/fs/nfsd/lockd.c * * This file contains all the stubs needed when communicating with lockd. * This level of indirection is necessary so we can run nfsd+lockd without * requiring the nfs client to be compiled in/loaded, and vice versa. * * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de> */ #include <linux/types.h> #include <linux/fs.h> #include <linux/file.h> #include <linux/mount.h> #include <linux/sunrpc/clnt.h> #include <linux/sunrpc/svc.h> #include <linux/nfsd/nfsd.h> #include <linux/lockd/bind.h> #define NFSDDBG_FACILITY NFSDDBG_LOCKD /* * Note: we hold the dentry use count while the file is open. */ static u32 nlm_fopen(struct svc_rqst *rqstp, struct nfs_fh *f, struct file **filp) { u32 nfserr; struct svc_fh fh; /* must initialize before using! but maxsize doesn't matter */ fh_init(&fh,0); fh.fh_handle.fh_size = f->size; memcpy((char*)&fh.fh_handle.fh_base, f->data, f->size); fh.fh_export = NULL; exp_readlock(); nfserr = nfsd_open(rqstp, &fh, S_IFREG, MAY_LOCK, filp); fh_put(&fh); rqstp->rq_client = NULL; exp_readunlock(); /* nlm and nfsd don't share error codes. * we invent: 0 = no error * 1 = stale file handle * 2 = other error */ switch (nfserr) { case nfs_ok: return 0; case nfserr_stale: return 1; default: return 2; } } static void nlm_fclose(struct file *filp) { fput(filp); } static struct nlmsvc_binding nfsd_nlm_ops = { .fopen = nlm_fopen, /* open file for locking */ .fclose = nlm_fclose, /* close file */ }; void nfsd_lockd_init(void) { dprintk("nfsd: initializing lockd\n"); nlmsvc_ops = &nfsd_nlm_ops; } void nfsd_lockd_shutdown(void) { nlmsvc_ops = NULL; }