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freebsd-dev/sys/nfsserver/nfs.h
Marius Strobl 9ea01fedc0 - Move nfs_realign() from the NFS client to the shared NFS code and 
remove the NFS server version in order to reduce code duplication.
  The shared version now uses a second parameter how, which is passed
  on to m_get(9) and m_getcl(9) as the server used M_WAIT while the
  client requires M_DONTWAIT, and replaces the the previously unused
  parameter hsiz.
- Change nfs_realign() to use nfsm_aligned() so as with other NFS code
  the alignment check isn't actually performed on platforms without
  strict alignment requirements for performance reasons because as the
  comment suggests unaligned data only occasionally occurs with TCP.
- Change fha_extract_info() to use nfs_realign() with M_DONTWAIT rather
  than M_WAIT because it's called with the RPC sp_lock held.

Reviewed by:	jhb, rmacklem
MFC after:	1 week
2010-02-09 23:45:14 +00:00

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/*-
* Copyright (c) 1989, 1993, 1995
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rick Macklem at The University of Guelph.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)nfs.h 8.4 (Berkeley) 5/1/95
* $FreeBSD$
*/
#ifndef _NFSSERVER_NFS_H_
#define _NFSSERVER_NFS_H_
#ifdef _KERNEL
#include "opt_nfs.h"
#endif
#include <nfs/nfssvc.h>
/*
* Tunable constants for nfs
*/
#define NFS_TICKINTVL 10 /* Desired time for a tick (msec) */
#define NFS_HZ (hz / nfs_ticks) /* Ticks/sec */
#define NFS_TIMEO (1 * NFS_HZ) /* Default timeout = 1 second */
#define NFS_MINTIMEO (1 * NFS_HZ) /* Min timeout to use */
#define NFS_MAXTIMEO (60 * NFS_HZ) /* Max timeout to backoff to */
#define NFS_MINIDEMTIMEO (5 * NFS_HZ) /* Min timeout for non-idempotent ops*/
#define NFS_MAXUIDHASH 64 /* Max. # of hashed uid entries/mp */
#ifndef NFS_GATHERDELAY
#define NFS_GATHERDELAY 10 /* Default write gather delay (msec) */
#endif
#ifdef _KERNEL
#define DIRBLKSIZ 512 /* XXX we used to use ufs's DIRBLKSIZ */
#endif
/*
* Oddballs
*/
#define NFS_SRVMAXDATA(n) \
(((n)->nd_flag & ND_NFSV3) ? (((n)->nd_nam2) ? \
NFS_MAXDGRAMDATA : NFS_MAXDATA) : NFS_V2MAXDATA)
/*
* XXX
* The B_INVAFTERWRITE flag should be set to whatever is required by the
* buffer cache code to say "Invalidate the block after it is written back".
*/
#define B_INVAFTERWRITE B_NOCACHE
/*
* The IO_METASYNC flag should be implemented for local filesystems.
* (Until then, it is nothin at all.)
*/
#ifndef IO_METASYNC
#define IO_METASYNC 0
#endif
/* NFS state flags XXX -Wunused */
#define NFSRV_SNDLOCK 0x01000000 /* Send socket lock */
#define NFSRV_WANTSND 0x02000000 /* Want above */
/*
* Structures for the nfssvc(2) syscall. Not that anyone but nfsd and
* mount_nfs should ever try and use it.
*/
/*
* Add a socket to monitor for NFS requests.
*/
struct nfsd_addsock_args {
int sock; /* Socket to serve */
caddr_t name; /* Client addr for connection based sockets */
int namelen; /* Length of name */
};
/*
* Start processing requests.
*/
struct nfsd_nfsd_args {
const char *principal; /* GSS-API service principal name */
int minthreads; /* minimum service thread count */
int maxthreads; /* maximum service thread count */
};
/*
* XXX to allow amd to include nfs.h without nfsproto.h
*/
#ifdef NFS_NPROCS
#include <nfsserver/nfsrvstats.h>
#endif
/*
* vfs.nfsrv sysctl(3) identifiers
*/
#define NFS_NFSRVSTATS 1 /* struct: struct nfsrvstats */
#define NFS_NFSPRIVPORT 2 /* int: prohibit nfs to resvports */
#ifdef _KERNEL
extern struct mtx nfsd_mtx;
#define NFSD_LOCK_ASSERT() mtx_assert(&nfsd_mtx, MA_OWNED)
#define NFSD_UNLOCK_ASSERT() mtx_assert(&nfsd_mtx, MA_NOTOWNED)
#define NFSD_LOCK_DONTCARE()
#define NFSD_LOCK() mtx_lock(&nfsd_mtx)
#define NFSD_UNLOCK() mtx_unlock(&nfsd_mtx)
#ifdef MALLOC_DECLARE
MALLOC_DECLARE(M_NFSRVDESC);
MALLOC_DECLARE(M_NFSD);
#endif
/* Forward declarations */
struct nfssvc_sock;
struct nfsrv_descript;
struct uio;
struct vattr;
struct nameidata;
extern struct callout nfsrv_callout;
extern struct nfsrvstats nfsrvstats;
extern int nfsrv_ticks;
extern int nfsrvw_procrastinate;
extern int nfsrvw_procrastinate_v3;
extern int nfsrv_numnfsd;
/* Various values converted to XDR form. */
extern u_int32_t nfsrv_nfs_false, nfsrv_nfs_true, nfsrv_nfs_xdrneg1,
nfsrv_nfs_prog;
extern u_int32_t nfsrv_rpc_reply, nfsrv_rpc_msgdenied, nfsrv_rpc_mismatch,
nfsrv_rpc_vers;
extern u_int32_t nfsrv_rpc_auth_unix, nfsrv_rpc_msgaccepted, nfsrv_rpc_call,
nfsrv_rpc_autherr;
/* Procedure table data */
extern const int nfsrvv2_procid[NFS_NPROCS];
extern const int nfsrv_nfsv3_procid[NFS_NPROCS];
extern int32_t (*nfsrv3_procs[NFS_NPROCS])(struct nfsrv_descript *nd,
struct nfssvc_sock *slp, struct mbuf **mreqp);
/*
* A list of nfssvc_sock structures is maintained with all the sockets
* that require service by the nfsd.
*/
#ifndef NFS_WDELAYHASHSIZ
#define NFS_WDELAYHASHSIZ 16 /* and with this */
#endif
#define NWDELAYHASH(sock, f) \
(&(sock)->ns_wdelayhashtbl[(*((u_int32_t *)(f))) % NFS_WDELAYHASHSIZ])
/*
* This structure is used by the server for describing each request.
*/
struct nfsrv_descript {
struct mbuf *nd_mrep; /* Request mbuf list */
struct mbuf *nd_md; /* Current dissect mbuf */
struct mbuf *nd_mreq; /* Reply mbuf list */
struct sockaddr *nd_nam; /* and socket addr */
struct sockaddr *nd_nam2; /* return socket addr */
caddr_t nd_dpos; /* Current dissect pos */
u_int32_t nd_procnum; /* RPC # */
int nd_stable; /* storage type */
int nd_flag; /* nd_flag */
int nd_repstat; /* Reply status */
fhandle_t nd_fh; /* File handle */
struct ucred *nd_cr; /* Credentials */
int nd_credflavor; /* Security flavor */
};
/* Bits for "nd_flag" */
#define ND_NFSV3 0x08
/*
* Defines for WebNFS
*/
#define WEBNFS_ESC_CHAR '%'
#define WEBNFS_SPECCHAR_START 0x80
#define WEBNFS_NATIVE_CHAR 0x80
/*
* ..
* Possibly more here in the future.
*/
/*
* Macro for converting escape characters in WebNFS pathnames.
* Should really be in libkern.
*/
#define HEXTOC(c) \
((c) >= 'a' ? ((c) - ('a' - 10)) : \
((c) >= 'A' ? ((c) - ('A' - 10)) : ((c) - '0')))
#define HEXSTRTOI(p) \
((HEXTOC(p[0]) << 4) + HEXTOC(p[1]))
#ifdef NFS_DEBUG
extern int nfs_debug;
#define NFS_DEBUG_ASYNCIO 1 /* asynchronous i/o */
#define NFS_DEBUG_WG 2 /* server write gathering */
#define NFS_DEBUG_RC 4 /* server request caching */
#define NFS_DPF(cat, args) \
do { \
if (nfs_debug & NFS_DEBUG_##cat) printf args; \
} while (0)
#else
#define NFS_DPF(cat, args)
#endif
struct mbuf *nfs_rephead(int, struct nfsrv_descript *, int, struct mbuf **,
caddr_t *);
void nfsm_srvfattr(struct nfsrv_descript *, struct vattr *,
struct nfs_fattr *);
void nfsm_srvwcc(struct nfsrv_descript *, int, struct vattr *, int,
struct vattr *, struct mbuf **, char **);
void nfsm_srvpostopattr(struct nfsrv_descript *, int, struct vattr *,
struct mbuf **, char **);
int nfs_namei(struct nameidata *, struct nfsrv_descript *, fhandle_t *,
int, struct nfssvc_sock *, struct sockaddr *, struct mbuf **,
caddr_t *, struct vnode **, int, struct vattr *, int *, int);
void nfsm_adj(struct mbuf *, int, int);
int nfsm_mbuftouio(struct mbuf **, struct uio *, int, caddr_t *);
void nfsrv_init(int);
int nfsrv_errmap(struct nfsrv_descript *, int);
void nfsrvw_sort(gid_t *, int);
int nfsrv3_access(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct mbuf **mrq);
int nfsrv_commit(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct mbuf **mrq);
int nfsrv_create(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct mbuf **mrq);
int nfsrv_fhtovp(fhandle_t *, int, struct vnode **, int *,
struct nfsrv_descript *, struct nfssvc_sock *, struct sockaddr *,
int *, int);
int nfsrv_setpublicfs(struct mount *, struct netexport *,
struct export_args *);
int nfs_ispublicfh(fhandle_t *);
int nfsrv_fsinfo(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct mbuf **mrq);
int nfsrv_getattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct mbuf **mrq);
int nfsrv_link(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct mbuf **mrq);
int nfsrv_lookup(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct mbuf **mrq);
int nfsrv_mkdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct mbuf **mrq);
int nfsrv_mknod(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct mbuf **mrq);
int nfsrv_noop(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct mbuf **mrq);
int nfsrv_null(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct mbuf **mrq);
int nfsrv_pathconf(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct mbuf **mrq);
int nfsrv_read(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct mbuf **mrq);
int nfsrv_readdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct mbuf **mrq);
int nfsrv_readdirplus(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct mbuf **mrq);
int nfsrv_readlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct mbuf **mrq);
int nfsrv_remove(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct mbuf **mrq);
int nfsrv_rename(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct mbuf **mrq);
int nfsrv_rmdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct mbuf **mrq);
int nfsrv_setattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct mbuf **mrq);
int nfsrv_statfs(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct mbuf **mrq);
int nfsrv_symlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct mbuf **mrq);
int nfsrv_write(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
struct mbuf **mrq);
/*
* #ifdef _SYS_SYSPROTO_H_ so that it is only defined when sysproto.h
* has been included, so that "struct nfssvc_args" is defined.
*/
#ifdef _SYS_SYSPROTO_H_
int nfssvc_nfsserver(struct thread *, struct nfssvc_args *);
#endif
#endif /* _KERNEL */
#endif
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