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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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70c3b76c28
Provide a file in the NFSD filesystem that allows setting and querying of which version of NFS are being exported. Changes are only allowed while no server is running. Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
143 lines
3.5 KiB
C
143 lines
3.5 KiB
C
/*
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* include/linux/nfsd/syscall.h
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*
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* This file holds all declarations for the knfsd syscall interface.
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*
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* Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
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*/
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#ifndef NFSD_SYSCALL_H
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#define NFSD_SYSCALL_H
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#include <asm/types.h>
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#ifdef __KERNEL__
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# include <linux/config.h>
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# include <linux/types.h>
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# include <linux/in.h>
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#endif
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#include <linux/posix_types.h>
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#include <linux/nfsd/const.h>
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#include <linux/nfsd/export.h>
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#include <linux/nfsd/nfsfh.h>
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#include <linux/nfsd/auth.h>
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/*
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* Version of the syscall interface
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*/
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#define NFSCTL_VERSION 0x0201
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/*
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* These are the commands understood by nfsctl().
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*/
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#define NFSCTL_SVC 0 /* This is a server process. */
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#define NFSCTL_ADDCLIENT 1 /* Add an NFS client. */
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#define NFSCTL_DELCLIENT 2 /* Remove an NFS client. */
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#define NFSCTL_EXPORT 3 /* export a file system. */
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#define NFSCTL_UNEXPORT 4 /* unexport a file system. */
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/*#define NFSCTL_UGIDUPDATE 5 / * update a client's uid/gid map. DISCARDED */
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/*#define NFSCTL_GETFH 6 / * get an fh by ino DISCARDED */
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#define NFSCTL_GETFD 7 /* get an fh by path (used by mountd) */
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#define NFSCTL_GETFS 8 /* get an fh by path with max FH len */
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/*
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* Macros used to set version
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*/
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#define NFSCTL_VERSET(_cltbits, _v) ((_cltbits) |= (1 << (_v)))
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#define NFSCTL_VERUNSET(_cltbits, _v) ((_cltbits) &= ~(1 << (_v)))
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#define NFSCTL_VERISSET(_cltbits, _v) ((_cltbits) & (1 << (_v)))
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#if defined(CONFIG_NFSD_V4)
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#define NFSCTL_VERALL (0x1c /* 0b011100 */)
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#elif defined(CONFIG_NFSD_V3)
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#define NFSCTL_VERALL (0x0c /* 0b001100 */)
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#else
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#define NFSCTL_VERALL (0x04 /* 0b000100 */)
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#endif
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/* SVC */
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struct nfsctl_svc {
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unsigned short svc_port;
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int svc_nthreads;
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};
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/* ADDCLIENT/DELCLIENT */
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struct nfsctl_client {
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char cl_ident[NFSCLNT_IDMAX+1];
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int cl_naddr;
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struct in_addr cl_addrlist[NFSCLNT_ADDRMAX];
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int cl_fhkeytype;
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int cl_fhkeylen;
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unsigned char cl_fhkey[NFSCLNT_KEYMAX];
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};
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/* EXPORT/UNEXPORT */
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struct nfsctl_export {
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char ex_client[NFSCLNT_IDMAX+1];
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char ex_path[NFS_MAXPATHLEN+1];
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__kernel_old_dev_t ex_dev;
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__kernel_ino_t ex_ino;
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int ex_flags;
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__kernel_uid_t ex_anon_uid;
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__kernel_gid_t ex_anon_gid;
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};
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/* GETFD */
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struct nfsctl_fdparm {
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struct sockaddr gd_addr;
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char gd_path[NFS_MAXPATHLEN+1];
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int gd_version;
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};
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/* GETFS - GET Filehandle with Size */
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struct nfsctl_fsparm {
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struct sockaddr gd_addr;
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char gd_path[NFS_MAXPATHLEN+1];
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int gd_maxlen;
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};
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/*
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* This is the argument union.
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*/
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struct nfsctl_arg {
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int ca_version; /* safeguard */
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union {
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struct nfsctl_svc u_svc;
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struct nfsctl_client u_client;
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struct nfsctl_export u_export;
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struct nfsctl_fdparm u_getfd;
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struct nfsctl_fsparm u_getfs;
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/*
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* The following dummy member is needed to preserve binary compatibility
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* on platforms where alignof(void*)>alignof(int). It's needed because
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* this union used to contain a member (u_umap) which contained a
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* pointer.
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*/
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void *u_ptr;
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} u;
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#define ca_svc u.u_svc
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#define ca_client u.u_client
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#define ca_export u.u_export
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#define ca_getfd u.u_getfd
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#define ca_getfs u.u_getfs
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};
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union nfsctl_res {
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__u8 cr_getfh[NFS_FHSIZE];
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struct knfsd_fh cr_getfs;
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};
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#ifdef __KERNEL__
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/*
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* Kernel syscall implementation.
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*/
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extern int exp_addclient(struct nfsctl_client *ncp);
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extern int exp_delclient(struct nfsctl_client *ncp);
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extern int exp_export(struct nfsctl_export *nxp);
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extern int exp_unexport(struct nfsctl_export *nxp);
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extern unsigned int nfsd_versbits;
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#endif /* __KERNEL__ */
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#endif /* NFSD_SYSCALL_H */
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