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fs/nfsd/lockd.c
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// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* 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> */ |
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#include <linux/file.h> |
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#include <linux/lockd/bind.h> |
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#include "nfsd.h" |
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#include "vfs.h" |
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#define NFSDDBG_FACILITY NFSDDBG_LOCKD |
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#ifdef CONFIG_LOCKD_V4 #define nlm_stale_fh nlm4_stale_fh #define nlm_failed nlm4_failed #else #define nlm_stale_fh nlm_lck_denied_nolocks #define nlm_failed nlm_lck_denied_nolocks #endif |
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/* * Note: we hold the dentry use count while the file is open. */ |
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static __be32 |
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nlm_fopen(struct svc_rqst *rqstp, struct nfs_fh *f, struct file **filp) { |
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__be32 nfserr; |
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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; |
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nfserr = nfsd_open(rqstp, &fh, S_IFREG, NFSD_MAY_LOCK, filp); |
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fh_put(&fh); |
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/* We return nlm error codes as nlm doesn't know * about nfsd, but nfsd does know about nlm.. |
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*/ switch (nfserr) { case nfs_ok: return 0; |
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case nfserr_dropit: return nlm_drop_reply; |
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case nfserr_stale: |
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return nlm_stale_fh; |
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default: |
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return nlm_failed; |
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} } static void nlm_fclose(struct file *filp) { fput(filp); } |
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static const struct nlmsvc_binding nfsd_nlm_ops = { |
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.fopen = nlm_fopen, /* open file for locking */ .fclose = nlm_fclose, /* close file */ }; void nfsd_lockd_init(void) { dprintk("nfsd: initializing lockd "); nlmsvc_ops = &nfsd_nlm_ops; } void nfsd_lockd_shutdown(void) { nlmsvc_ops = NULL; } |