38a7031559
Move common code in NFSD's legacy SYMLINK decoders into a helper. The immediate benefits include: - one fewer data copies on transports that support DDP - consistent error checking across all versions - reduction of code duplication - support for both legal forms of SYMLINK requests on RDMA transports for all versions of NFS (in particular, NFSv2, for completeness) In the long term, this helper is an appropriate spot to perform a per-transport call-out to fill the pathname argument using, say, RDMA Reads. Filling the pathname in the proc function also means that eventually the incoming filehandle can be interpreted so that filesystem- specific memory can be allocated as a sink for the pathname argument, rather than using anonymous pages. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
166 lines
3.6 KiB
C
166 lines
3.6 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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int vlen;
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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 kvec first;
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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_readlinkargs {
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struct svc_fh fh;
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char * buffer;
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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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__be32 * buffer;
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};
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struct nfsd_attrstat {
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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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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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int len;
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};
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struct nfsd_readres {
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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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};
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struct nfsd_readdirres {
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int count;
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struct readdir_cd common;
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__be32 * buffer;
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int buflen;
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__be32 * offset;
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};
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struct nfsd_statfsres {
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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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int nfssvc_decode_void(struct svc_rqst *, __be32 *);
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int nfssvc_decode_fhandle(struct svc_rqst *, __be32 *);
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int nfssvc_decode_sattrargs(struct svc_rqst *, __be32 *);
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int nfssvc_decode_diropargs(struct svc_rqst *, __be32 *);
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int nfssvc_decode_readargs(struct svc_rqst *, __be32 *);
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int nfssvc_decode_writeargs(struct svc_rqst *, __be32 *);
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int nfssvc_decode_createargs(struct svc_rqst *, __be32 *);
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int nfssvc_decode_renameargs(struct svc_rqst *, __be32 *);
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int nfssvc_decode_readlinkargs(struct svc_rqst *, __be32 *);
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int nfssvc_decode_linkargs(struct svc_rqst *, __be32 *);
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int nfssvc_decode_symlinkargs(struct svc_rqst *, __be32 *);
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int nfssvc_decode_readdirargs(struct svc_rqst *, __be32 *);
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int nfssvc_encode_void(struct svc_rqst *, __be32 *);
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int nfssvc_encode_attrstat(struct svc_rqst *, __be32 *);
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int nfssvc_encode_diropres(struct svc_rqst *, __be32 *);
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int nfssvc_encode_readlinkres(struct svc_rqst *, __be32 *);
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int nfssvc_encode_readres(struct svc_rqst *, __be32 *);
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int nfssvc_encode_statfsres(struct svc_rqst *, __be32 *);
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int nfssvc_encode_readdirres(struct svc_rqst *, __be32 *);
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int nfssvc_encode_entry(void *, const char *name,
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int namlen, loff_t offset, u64 ino, unsigned int);
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void nfssvc_release_fhandle(struct svc_rqst *);
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/* Helper functions for NFSv2 ACL code */
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__be32 *nfs2svc_encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp, struct kstat *stat);
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__be32 *nfs2svc_decode_fh(__be32 *p, struct svc_fh *fhp);
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#endif /* LINUX_NFSD_H */
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