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130e2054d4
Returning an undecorated integer is an age-old trope, but it's not clear (even to previous experts in this code) that the only valid return values are 1 and 0. These functions do not return a negative errno, rpc_stat value, or a positive length. Document there are only two valid return values by having .pc_encode return only true or false. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
177 lines
4.3 KiB
C
177 lines
4.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* XDR types for nfsd. This is mainly a typing exercise. */
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#ifndef LINUX_NFSD_H
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#define LINUX_NFSD_H
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#include <linux/vfs.h>
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#include "nfsd.h"
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#include "nfsfh.h"
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struct nfsd_fhandle {
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struct svc_fh fh;
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};
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struct nfsd_sattrargs {
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struct svc_fh fh;
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struct iattr attrs;
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};
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struct nfsd_diropargs {
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struct svc_fh fh;
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char * name;
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unsigned int len;
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};
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struct nfsd_readargs {
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struct svc_fh fh;
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__u32 offset;
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__u32 count;
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};
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struct nfsd_writeargs {
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svc_fh fh;
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__u32 offset;
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int len;
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struct xdr_buf payload;
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};
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struct nfsd_createargs {
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struct svc_fh fh;
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char * name;
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unsigned int len;
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struct iattr attrs;
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};
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struct nfsd_renameargs {
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struct svc_fh ffh;
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char * fname;
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unsigned int flen;
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struct svc_fh tfh;
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char * tname;
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unsigned int tlen;
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};
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struct nfsd_linkargs {
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struct svc_fh ffh;
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struct svc_fh tfh;
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char * tname;
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unsigned int tlen;
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};
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struct nfsd_symlinkargs {
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struct svc_fh ffh;
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char * fname;
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unsigned int flen;
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char * tname;
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unsigned int tlen;
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struct iattr attrs;
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struct kvec first;
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};
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struct nfsd_readdirargs {
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struct svc_fh fh;
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__u32 cookie;
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__u32 count;
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};
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struct nfsd_stat {
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__be32 status;
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};
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struct nfsd_attrstat {
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__be32 status;
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struct svc_fh fh;
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struct kstat stat;
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};
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struct nfsd_diropres {
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__be32 status;
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struct svc_fh fh;
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struct kstat stat;
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};
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struct nfsd_readlinkres {
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__be32 status;
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int len;
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struct page *page;
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};
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struct nfsd_readres {
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__be32 status;
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struct svc_fh fh;
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unsigned long count;
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struct kstat stat;
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struct page **pages;
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};
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struct nfsd_readdirres {
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/* Components of the reply */
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__be32 status;
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int count;
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/* Used to encode the reply's entry list */
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struct xdr_stream xdr;
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struct xdr_buf dirlist;
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struct readdir_cd common;
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unsigned int cookie_offset;
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};
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struct nfsd_statfsres {
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__be32 status;
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struct kstatfs stats;
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};
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/*
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* Storage requirements for XDR arguments and results.
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*/
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union nfsd_xdrstore {
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struct nfsd_sattrargs sattr;
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struct nfsd_diropargs dirop;
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struct nfsd_readargs read;
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struct nfsd_writeargs write;
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struct nfsd_createargs create;
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struct nfsd_renameargs rename;
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struct nfsd_linkargs link;
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struct nfsd_symlinkargs symlink;
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struct nfsd_readdirargs readdir;
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};
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#define NFS2_SVC_XDRSIZE sizeof(union nfsd_xdrstore)
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bool nfssvc_decode_fhandleargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
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bool nfssvc_decode_sattrargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
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bool nfssvc_decode_diropargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
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bool nfssvc_decode_readargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
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bool nfssvc_decode_writeargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
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bool nfssvc_decode_createargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
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bool nfssvc_decode_renameargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
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bool nfssvc_decode_linkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
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bool nfssvc_decode_symlinkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
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bool nfssvc_decode_readdirargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
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bool nfssvc_encode_statres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
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bool nfssvc_encode_attrstatres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
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bool nfssvc_encode_diropres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
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bool nfssvc_encode_readlinkres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
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bool nfssvc_encode_readres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
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bool nfssvc_encode_statfsres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
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bool nfssvc_encode_readdirres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
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void nfssvc_encode_nfscookie(struct nfsd_readdirres *resp, u32 offset);
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int nfssvc_encode_entry(void *data, const char *name, int namlen,
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loff_t offset, u64 ino, unsigned int d_type);
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void nfssvc_release_attrstat(struct svc_rqst *rqstp);
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void nfssvc_release_diropres(struct svc_rqst *rqstp);
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void nfssvc_release_readres(struct svc_rqst *rqstp);
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/* Helper functions for NFSv2 ACL code */
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bool svcxdr_decode_fhandle(struct xdr_stream *xdr, struct svc_fh *fhp);
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bool svcxdr_encode_stat(struct xdr_stream *xdr, __be32 status);
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bool svcxdr_encode_fattr(struct svc_rqst *rqstp, struct xdr_stream *xdr,
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const struct svc_fh *fhp, const struct kstat *stat);
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#endif /* LINUX_NFSD_H */
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