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