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freebsd-dev/sys/nfs/nfs_common.c
dfr 7abcc0e65a Improve the queuing algorithms used by NFS' asynchronous i/o. The 
existing mechanism uses a global queue for some buffers and the
vp->b_dirtyblkhd queue for others.  This turns sequential writes into
randomly ordered writes to the server, affecting both read and write
performance.  The existing mechanism also copes badly with hung
servers, tending to block accesses to other servers when all the iods
are waiting for a hung server.

The new mechanism uses a queue for each mount point.  All asynchronous
i/o goes through this queue which preserves the ordering of requests.
A simple mechanism ensures that the iods are shared out fairly between
active mount points.  This removes the sysctl variable vfs.nfs.dwrite
since the new queueing mechanism removes the old delayed write code
completely.

This should go into the 2.2 branch.
1996-11-06 10:53:16 +00:00

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/*
* Copyright (c) 1989, 1993
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 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_subs.c 8.3 (Berkeley) 1/4/94
* $Id: nfs_subs.c,v 1.33 1996/09/19 18:20:59 nate Exp $
*/
/*
* These functions support the macros and help fiddle mbuf chains for
* the nfs op functions. They do things like create the rpc header and
* copy data between mbuf chains and uio lists.
*/
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/mount.h>
#include <sys/vnode.h>
#include <sys/namei.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/malloc.h>
#ifdef VFS_LKM
#include <sys/sysent.h>
#include <sys/syscall.h>
#endif
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/vm_object.h>
#include <vm/vm_extern.h>
#include <vm/vnode_pager.h>
#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>
#include <nfs/nfsnode.h>
#include <nfs/nfs.h>
#include <nfs/xdr_subs.h>
#include <nfs/nfsm_subs.h>
#include <nfs/nfsmount.h>
#include <nfs/nqnfs.h>
#include <nfs/nfsrtt.h>
#include <miscfs/specfs/specdev.h>
#include <netinet/in.h>
#ifdef ISO
#include <netiso/iso.h>
#endif
/*
* Data items converted to xdr at startup, since they are constant
* This is kinda hokey, but may save a little time doing byte swaps
*/
u_long nfs_xdrneg1;
u_long rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr,
rpc_mismatch, rpc_auth_unix, rpc_msgaccepted,
rpc_auth_kerb;
u_long nfs_prog, nqnfs_prog, nfs_true, nfs_false;
/* And other global data */
static u_long nfs_xid = 0;
static enum vtype nv2tov_type[8]= {
VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON
};
enum vtype nv3tov_type[8]= {
VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO
};
int nfs_ticks;
struct nfs_reqq nfs_reqq;
struct nfssvc_sockhead nfssvc_sockhead;
int nfssvc_sockhead_flag;
struct nfsd_head nfsd_head;
int nfsd_head_flag;
struct nfs_bufq nfs_bufq;
struct nqtimerhead nqtimerhead;
struct nqfhhashhead *nqfhhashtbl;
u_long nqfhhash;
#ifndef NFS_NOSERVER
/*
* Mapping of old NFS Version 2 RPC numbers to generic numbers.
*/
int nfsv3_procid[NFS_NPROCS] = {
NFSPROC_NULL,
NFSPROC_GETATTR,
NFSPROC_SETATTR,
NFSPROC_NOOP,
NFSPROC_LOOKUP,
NFSPROC_READLINK,
NFSPROC_READ,
NFSPROC_NOOP,
NFSPROC_WRITE,
NFSPROC_CREATE,
NFSPROC_REMOVE,
NFSPROC_RENAME,
NFSPROC_LINK,
NFSPROC_SYMLINK,
NFSPROC_MKDIR,
NFSPROC_RMDIR,
NFSPROC_READDIR,
NFSPROC_FSSTAT,
NFSPROC_NOOP,
NFSPROC_NOOP,
NFSPROC_NOOP,
NFSPROC_NOOP,
NFSPROC_NOOP,
NFSPROC_NOOP,
NFSPROC_NOOP,
NFSPROC_NOOP
};
#endif /* NFS_NOSERVER */
/*
* and the reverse mapping from generic to Version 2 procedure numbers
*/
int nfsv2_procid[NFS_NPROCS] = {
NFSV2PROC_NULL,
NFSV2PROC_GETATTR,
NFSV2PROC_SETATTR,
NFSV2PROC_LOOKUP,
NFSV2PROC_NOOP,
NFSV2PROC_READLINK,
NFSV2PROC_READ,
NFSV2PROC_WRITE,
NFSV2PROC_CREATE,
NFSV2PROC_MKDIR,
NFSV2PROC_SYMLINK,
NFSV2PROC_CREATE,
NFSV2PROC_REMOVE,
NFSV2PROC_RMDIR,
NFSV2PROC_RENAME,
NFSV2PROC_LINK,
NFSV2PROC_READDIR,
NFSV2PROC_NOOP,
NFSV2PROC_STATFS,
NFSV2PROC_NOOP,
NFSV2PROC_NOOP,
NFSV2PROC_NOOP,
NFSV2PROC_NOOP,
NFSV2PROC_NOOP,
NFSV2PROC_NOOP,
NFSV2PROC_NOOP,
};
#ifndef NFS_NOSERVER
/*
* Maps errno values to nfs error numbers.
* Use NFSERR_IO as the catch all for ones not specifically defined in
* RFC 1094.
*/
static u_char nfsrv_v2errmap[ELAST] = {
NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO,
NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO,
NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR,
NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS,
NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO,
NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE,
NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
NFSERR_IO,
};
/*
* Maps errno values to nfs error numbers.
* Although it is not obvious whether or not NFS clients really care if
* a returned error value is in the specified list for the procedure, the
* safest thing to do is filter them appropriately. For Version 2, the
* X/Open XNFS document is the only specification that defines error values
* for each RPC (The RFC simply lists all possible error values for all RPCs),
* so I have decided to not do this for Version 2.
* The first entry is the default error return and the rest are the valid
* errors for that RPC in increasing numeric order.
*/
static short nfsv3err_null[] = {
0,
0,
};
static short nfsv3err_getattr[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_setattr[] = {
NFSERR_IO,
NFSERR_PERM,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_INVAL,
NFSERR_NOSPC,
NFSERR_ROFS,
NFSERR_DQUOT,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_NOT_SYNC,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_lookup[] = {
NFSERR_IO,
NFSERR_NOENT,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_NOTDIR,
NFSERR_NAMETOL,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_access[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_readlink[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_INVAL,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_NOTSUPP,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_read[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_NXIO,
NFSERR_ACCES,
NFSERR_INVAL,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_write[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_INVAL,
NFSERR_FBIG,
NFSERR_NOSPC,
NFSERR_ROFS,
NFSERR_DQUOT,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_create[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_EXIST,
NFSERR_NOTDIR,
NFSERR_NOSPC,
NFSERR_ROFS,
NFSERR_NAMETOL,
NFSERR_DQUOT,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_NOTSUPP,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_mkdir[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_EXIST,
NFSERR_NOTDIR,
NFSERR_NOSPC,
NFSERR_ROFS,
NFSERR_NAMETOL,
NFSERR_DQUOT,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_NOTSUPP,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_symlink[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_EXIST,
NFSERR_NOTDIR,
NFSERR_NOSPC,
NFSERR_ROFS,
NFSERR_NAMETOL,
NFSERR_DQUOT,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_NOTSUPP,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_mknod[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_EXIST,
NFSERR_NOTDIR,
NFSERR_NOSPC,
NFSERR_ROFS,
NFSERR_NAMETOL,
NFSERR_DQUOT,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_NOTSUPP,
NFSERR_SERVERFAULT,
NFSERR_BADTYPE,
0,
};
static short nfsv3err_remove[] = {
NFSERR_IO,
NFSERR_NOENT,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_NOTDIR,
NFSERR_ROFS,
NFSERR_NAMETOL,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_rmdir[] = {
NFSERR_IO,
NFSERR_NOENT,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_EXIST,
NFSERR_NOTDIR,
NFSERR_INVAL,
NFSERR_ROFS,
NFSERR_NAMETOL,
NFSERR_NOTEMPTY,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_NOTSUPP,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_rename[] = {
NFSERR_IO,
NFSERR_NOENT,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_EXIST,
NFSERR_XDEV,
NFSERR_NOTDIR,
NFSERR_ISDIR,
NFSERR_INVAL,
NFSERR_NOSPC,
NFSERR_ROFS,
NFSERR_MLINK,
NFSERR_NAMETOL,
NFSERR_NOTEMPTY,
NFSERR_DQUOT,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_NOTSUPP,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_link[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_EXIST,
NFSERR_XDEV,
NFSERR_NOTDIR,
NFSERR_INVAL,
NFSERR_NOSPC,
NFSERR_ROFS,
NFSERR_MLINK,
NFSERR_NAMETOL,
NFSERR_DQUOT,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_NOTSUPP,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_readdir[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_NOTDIR,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_BAD_COOKIE,
NFSERR_TOOSMALL,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_readdirplus[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_NOTDIR,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_BAD_COOKIE,
NFSERR_NOTSUPP,
NFSERR_TOOSMALL,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_fsstat[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_fsinfo[] = {
NFSERR_STALE,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_pathconf[] = {
NFSERR_STALE,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_commit[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_SERVERFAULT,
0,
};
static short *nfsrv_v3errmap[] = {
nfsv3err_null,
nfsv3err_getattr,
nfsv3err_setattr,
nfsv3err_lookup,
nfsv3err_access,
nfsv3err_readlink,
nfsv3err_read,
nfsv3err_write,
nfsv3err_create,
nfsv3err_mkdir,
nfsv3err_symlink,
nfsv3err_mknod,
nfsv3err_remove,
nfsv3err_rmdir,
nfsv3err_rename,
nfsv3err_link,
nfsv3err_readdir,
nfsv3err_readdirplus,
nfsv3err_fsstat,
nfsv3err_fsinfo,
nfsv3err_pathconf,
nfsv3err_commit,
};
#endif /* NFS_NOSERVER */
extern struct nfsrtt nfsrtt;
extern time_t nqnfsstarttime;
extern int nqsrv_clockskew;
extern int nqsrv_writeslack;
extern int nqsrv_maxlease;
extern struct nfsstats nfsstats;
extern int nqnfs_piggy[NFS_NPROCS];
extern nfstype nfsv2_type[9];
extern nfstype nfsv3_type[9];
extern struct nfsnodehashhead *nfsnodehashtbl;
extern u_long nfsnodehash;
#ifdef VFS_LKM
struct getfh_args;
extern int getfh(struct proc *, struct getfh_args *, int *);
struct nfssvc_args;
extern int nfssvc(struct proc *, struct nfssvc_args *, int *);
#endif
LIST_HEAD(nfsnodehashhead, nfsnode);
/*
* Create the header for an rpc request packet
* The hsiz is the size of the rest of the nfs request header.
* (just used to decide if a cluster is a good idea)
*/
struct mbuf *
nfsm_reqh(vp, procid, hsiz, bposp)
struct vnode *vp;
u_long procid;
int hsiz;
caddr_t *bposp;
{
register struct mbuf *mb;
register u_long *tl;
register caddr_t bpos;
struct mbuf *mb2;
struct nfsmount *nmp;
int nqflag;
MGET(mb, M_WAIT, MT_DATA);
if (hsiz >= MINCLSIZE)
MCLGET(mb, M_WAIT);
mb->m_len = 0;
bpos = mtod(mb, caddr_t);
/*
* For NQNFS, add lease request.
*/
if (vp) {
nmp = VFSTONFS(vp->v_mount);
if (nmp->nm_flag & NFSMNT_NQNFS) {
nqflag = NQNFS_NEEDLEASE(vp, procid);
if (nqflag) {
nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED);
*tl++ = txdr_unsigned(nqflag);
*tl = txdr_unsigned(nmp->nm_leaseterm);
} else {
nfsm_build(tl, u_long *, NFSX_UNSIGNED);
*tl = 0;
}
}
}
/* Finally, return values */
*bposp = bpos;
return (mb);
}
/*
* Build the RPC header and fill in the authorization info.
* The authorization string argument is only used when the credentials
* come from outside of the kernel.
* Returns the head of the mbuf list.
*/
struct mbuf *
nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len,
verf_str, mrest, mrest_len, mbp, xidp)
register struct ucred *cr;
int nmflag;
int procid;
int auth_type;
int auth_len;
char *auth_str;
int verf_len;
char *verf_str;
struct mbuf *mrest;
int mrest_len;
struct mbuf **mbp;
u_long *xidp;
{
register struct mbuf *mb;
register u_long *tl;
register caddr_t bpos;
register int i;
struct mbuf *mreq, *mb2;
int siz, grpsiz, authsiz;
struct timeval tv;
static u_long base;
authsiz = nfsm_rndup(auth_len);
MGETHDR(mb, M_WAIT, MT_DATA);
if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) {
MCLGET(mb, M_WAIT);
} else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) {
MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED);
} else {
MH_ALIGN(mb, 8 * NFSX_UNSIGNED);
}
mb->m_len = 0;
mreq = mb;
bpos = mtod(mb, caddr_t);
/*
* First the RPC header.
*/
nfsm_build(tl, u_long *, 8 * NFSX_UNSIGNED);
/*
* derive initial xid from system time
* XXX time is invalid if root not yet mounted
*/
if (!base && (rootvp)) {
microtime(&tv);
base = tv.tv_sec << 12;
nfs_xid = base;
}
/*
* Skip zero xid if it should ever happen.
*/
if (++nfs_xid == 0)
nfs_xid++;
*tl++ = *xidp = txdr_unsigned(nfs_xid);
*tl++ = rpc_call;
*tl++ = rpc_vers;
if (nmflag & NFSMNT_NQNFS) {
*tl++ = txdr_unsigned(NQNFS_PROG);
*tl++ = txdr_unsigned(NQNFS_VER3);
} else {
*tl++ = txdr_unsigned(NFS_PROG);
if (nmflag & NFSMNT_NFSV3)
*tl++ = txdr_unsigned(NFS_VER3);
else
*tl++ = txdr_unsigned(NFS_VER2);
}
if (nmflag & NFSMNT_NFSV3)
*tl++ = txdr_unsigned(procid);
else
*tl++ = txdr_unsigned(nfsv2_procid[procid]);
/*
* And then the authorization cred.
*/
*tl++ = txdr_unsigned(auth_type);
*tl = txdr_unsigned(authsiz);
switch (auth_type) {
case RPCAUTH_UNIX:
nfsm_build(tl, u_long *, auth_len);
*tl++ = 0; /* stamp ?? */
*tl++ = 0; /* NULL hostname */
*tl++ = txdr_unsigned(cr->cr_uid);
*tl++ = txdr_unsigned(cr->cr_groups[0]);
grpsiz = (auth_len >> 2) - 5;
*tl++ = txdr_unsigned(grpsiz);
for (i = 1; i <= grpsiz; i++)
*tl++ = txdr_unsigned(cr->cr_groups[i]);
break;
case RPCAUTH_KERB4:
siz = auth_len;
while (siz > 0) {
if (M_TRAILINGSPACE(mb) == 0) {
MGET(mb2, M_WAIT, MT_DATA);
if (siz >= MINCLSIZE)
MCLGET(mb2, M_WAIT);
mb->m_next = mb2;
mb = mb2;
mb->m_len = 0;
bpos = mtod(mb, caddr_t);
}
i = min(siz, M_TRAILINGSPACE(mb));
bcopy(auth_str, bpos, i);
mb->m_len += i;
auth_str += i;
bpos += i;
siz -= i;
}
if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) {
for (i = 0; i < siz; i++)
*bpos++ = '\0';
mb->m_len += siz;
}
break;
};
/*
* And the verifier...
*/
nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED);
if (verf_str) {
*tl++ = txdr_unsigned(RPCAUTH_KERB4);
*tl = txdr_unsigned(verf_len);
siz = verf_len;
while (siz > 0) {
if (M_TRAILINGSPACE(mb) == 0) {
MGET(mb2, M_WAIT, MT_DATA);
if (siz >= MINCLSIZE)
MCLGET(mb2, M_WAIT);
mb->m_next = mb2;
mb = mb2;
mb->m_len = 0;
bpos = mtod(mb, caddr_t);
}
i = min(siz, M_TRAILINGSPACE(mb));
bcopy(verf_str, bpos, i);
mb->m_len += i;
verf_str += i;
bpos += i;
siz -= i;
}
if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) {
for (i = 0; i < siz; i++)
*bpos++ = '\0';
mb->m_len += siz;
}
} else {
*tl++ = txdr_unsigned(RPCAUTH_NULL);
*tl = 0;
}
mb->m_next = mrest;
mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len;
mreq->m_pkthdr.rcvif = (struct ifnet *)0;
*mbp = mb;
return (mreq);
}
/*
* copies mbuf chain to the uio scatter/gather list
*/
int
nfsm_mbuftouio(mrep, uiop, siz, dpos)
struct mbuf **mrep;
register struct uio *uiop;
int siz;
caddr_t *dpos;
{
register char *mbufcp, *uiocp;
register int xfer, left, len;
register struct mbuf *mp;
long uiosiz, rem;
int error = 0;
mp = *mrep;
mbufcp = *dpos;
len = mtod(mp, caddr_t)+mp->m_len-mbufcp;
rem = nfsm_rndup(siz)-siz;
while (siz > 0) {
if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL)
return (EFBIG);
left = uiop->uio_iov->iov_len;
uiocp = uiop->uio_iov->iov_base;
if (left > siz)
left = siz;
uiosiz = left;
while (left > 0) {
while (len == 0) {
mp = mp->m_next;
if (mp == NULL)
return (EBADRPC);
mbufcp = mtod(mp, caddr_t);
len = mp->m_len;
}
xfer = (left > len) ? len : left;
#ifdef notdef
/* Not Yet.. */
if (uiop->uio_iov->iov_op != NULL)
(*(uiop->uio_iov->iov_op))
(mbufcp, uiocp, xfer);
else
#endif
if (uiop->uio_segflg == UIO_SYSSPACE)
bcopy(mbufcp, uiocp, xfer);
else
copyout(mbufcp, uiocp, xfer);
left -= xfer;
len -= xfer;
mbufcp += xfer;
uiocp += xfer;
uiop->uio_offset += xfer;
uiop->uio_resid -= xfer;
}
if (uiop->uio_iov->iov_len <= siz) {
uiop->uio_iovcnt--;
uiop->uio_iov++;
} else {
uiop->uio_iov->iov_base += uiosiz;
uiop->uio_iov->iov_len -= uiosiz;
}
siz -= uiosiz;
}
*dpos = mbufcp;
*mrep = mp;
if (rem > 0) {
if (len < rem)
error = nfs_adv(mrep, dpos, rem, len);
else
*dpos += rem;
}
return (error);
}
/*
* copies a uio scatter/gather list to an mbuf chain.
* NOTE: can ony handle iovcnt == 1
*/
int
nfsm_uiotombuf(uiop, mq, siz, bpos)
register struct uio *uiop;
struct mbuf **mq;
int siz;
caddr_t *bpos;
{
register char *uiocp;
register struct mbuf *mp, *mp2;
register int xfer, left, mlen;
int uiosiz, clflg, rem;
char *cp;
if (uiop->uio_iovcnt != 1)
panic("nfsm_uiotombuf: iovcnt != 1");
if (siz > MLEN) /* or should it >= MCLBYTES ?? */
clflg = 1;
else
clflg = 0;
rem = nfsm_rndup(siz)-siz;
mp = mp2 = *mq;
while (siz > 0) {
left = uiop->uio_iov->iov_len;
uiocp = uiop->uio_iov->iov_base;
if (left > siz)
left = siz;
uiosiz = left;
while (left > 0) {
mlen = M_TRAILINGSPACE(mp);
if (mlen == 0) {
MGET(mp, M_WAIT, MT_DATA);
if (clflg)
MCLGET(mp, M_WAIT);
mp->m_len = 0;
mp2->m_next = mp;
mp2 = mp;
mlen = M_TRAILINGSPACE(mp);
}
xfer = (left > mlen) ? mlen : left;
#ifdef notdef
/* Not Yet.. */
if (uiop->uio_iov->iov_op != NULL)
(*(uiop->uio_iov->iov_op))
(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
else
#endif
if (uiop->uio_segflg == UIO_SYSSPACE)
bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
else
copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
mp->m_len += xfer;
left -= xfer;
uiocp += xfer;
uiop->uio_offset += xfer;
uiop->uio_resid -= xfer;
}
uiop->uio_iov->iov_base += uiosiz;
uiop->uio_iov->iov_len -= uiosiz;
siz -= uiosiz;
}
if (rem > 0) {
if (rem > M_TRAILINGSPACE(mp)) {
MGET(mp, M_WAIT, MT_DATA);
mp->m_len = 0;
mp2->m_next = mp;
}
cp = mtod(mp, caddr_t)+mp->m_len;
for (left = 0; left < rem; left++)
*cp++ = '\0';
mp->m_len += rem;
*bpos = cp;
} else
*bpos = mtod(mp, caddr_t)+mp->m_len;
*mq = mp;
return (0);
}
/*
* Help break down an mbuf chain by setting the first siz bytes contiguous
* pointed to by returned val.
* This is used by the macros nfsm_dissect and nfsm_dissecton for tough
* cases. (The macros use the vars. dpos and dpos2)
*/
int
nfsm_disct(mdp, dposp, siz, left, cp2)
struct mbuf **mdp;
caddr_t *dposp;
int siz;
int left;
caddr_t *cp2;
{
register struct mbuf *mp, *mp2;
register int siz2, xfer;
register caddr_t p;
mp = *mdp;
while (left == 0) {
*mdp = mp = mp->m_next;
if (mp == NULL)
return (EBADRPC);
left = mp->m_len;
*dposp = mtod(mp, caddr_t);
}
if (left >= siz) {
*cp2 = *dposp;
*dposp += siz;
} else if (mp->m_next == NULL) {
return (EBADRPC);
} else if (siz > MHLEN) {
panic("nfs S too big");
} else {
MGET(mp2, M_WAIT, MT_DATA);
mp2->m_next = mp->m_next;
mp->m_next = mp2;
mp->m_len -= left;
mp = mp2;
*cp2 = p = mtod(mp, caddr_t);
bcopy(*dposp, p, left); /* Copy what was left */
siz2 = siz-left;
p += left;
mp2 = mp->m_next;
/* Loop around copying up the siz2 bytes */
while (siz2 > 0) {
if (mp2 == NULL)
return (EBADRPC);
xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2;
if (xfer > 0) {
bcopy(mtod(mp2, caddr_t), p, xfer);
NFSMADV(mp2, xfer);
mp2->m_len -= xfer;
p += xfer;
siz2 -= xfer;
}
if (siz2 > 0)
mp2 = mp2->m_next;
}
mp->m_len = siz;
*mdp = mp2;
*dposp = mtod(mp2, caddr_t);
}
return (0);
}
/*
* Advance the position in the mbuf chain.
*/
int
nfs_adv(mdp, dposp, offs, left)
struct mbuf **mdp;
caddr_t *dposp;
int offs;
int left;
{
register struct mbuf *m;
register int s;
m = *mdp;
s = left;
while (s < offs) {
offs -= s;
m = m->m_next;
if (m == NULL)
return (EBADRPC);
s = m->m_len;
}
*mdp = m;
*dposp = mtod(m, caddr_t)+offs;
return (0);
}
/*
* Copy a string into mbufs for the hard cases...
*/
int
nfsm_strtmbuf(mb, bpos, cp, siz)
struct mbuf **mb;
char **bpos;
char *cp;
long siz;
{
register struct mbuf *m1 = 0, *m2;
long left, xfer, len, tlen;
u_long *tl;
int putsize;
putsize = 1;
m2 = *mb;
left = M_TRAILINGSPACE(m2);
if (left > 0) {
tl = ((u_long *)(*bpos));
*tl++ = txdr_unsigned(siz);
putsize = 0;
left -= NFSX_UNSIGNED;
m2->m_len += NFSX_UNSIGNED;
if (left > 0) {
bcopy(cp, (caddr_t) tl, left);
siz -= left;
cp += left;
m2->m_len += left;
left = 0;
}
}
/* Loop around adding mbufs */
while (siz > 0) {
MGET(m1, M_WAIT, MT_DATA);
if (siz > MLEN)
MCLGET(m1, M_WAIT);
m1->m_len = NFSMSIZ(m1);
m2->m_next = m1;
m2 = m1;
tl = mtod(m1, u_long *);
tlen = 0;
if (putsize) {
*tl++ = txdr_unsigned(siz);
m1->m_len -= NFSX_UNSIGNED;
tlen = NFSX_UNSIGNED;
putsize = 0;
}
if (siz < m1->m_len) {
len = nfsm_rndup(siz);
xfer = siz;
if (xfer < len)
*(tl+(xfer>>2)) = 0;
} else {
xfer = len = m1->m_len;
}
bcopy(cp, (caddr_t) tl, xfer);
m1->m_len = len+tlen;
siz -= xfer;
cp += xfer;
}
*mb = m1;
*bpos = mtod(m1, caddr_t)+m1->m_len;
return (0);
}
/*
* Called once to initialize data structures...
*/
int
nfs_init()
{
register int i;
/*
* Check to see if major data structures haven't bloated.
*/
if (sizeof (struct nfsnode) > NFS_NODEALLOC) {
printf("struct nfsnode bloated (> %dbytes)\n", NFS_NODEALLOC);
printf("Try reducing NFS_SMALLFH\n");
}
if (sizeof (struct nfsmount) > NFS_MNTALLOC) {
printf("struct nfsmount bloated (> %dbytes)\n", NFS_MNTALLOC);
printf("Try reducing NFS_MUIDHASHSIZ\n");
}
if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) {
printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC);
printf("Try reducing NFS_UIDHASHSIZ\n");
}
if (sizeof (struct nfsuid) > NFS_UIDALLOC) {
printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC);
printf("Try unionizing the nu_nickname and nu_flag fields\n");
}
nfsrtt.pos = 0;
rpc_vers = txdr_unsigned(RPC_VER2);
rpc_call = txdr_unsigned(RPC_CALL);
rpc_reply = txdr_unsigned(RPC_REPLY);
rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED);
rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED);
rpc_mismatch = txdr_unsigned(RPC_MISMATCH);
rpc_autherr = txdr_unsigned(RPC_AUTHERR);
rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX);
rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4);
nfs_prog = txdr_unsigned(NFS_PROG);
nqnfs_prog = txdr_unsigned(NQNFS_PROG);
nfs_true = txdr_unsigned(TRUE);
nfs_false = txdr_unsigned(FALSE);
nfs_xdrneg1 = txdr_unsigned(-1);
nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000;
if (nfs_ticks < 1)
nfs_ticks = 1;
/* Ensure async daemons disabled */
for (i = 0; i < NFS_MAXASYNCDAEMON; i++) {
nfs_iodwant[i] = (struct proc *)0;
nfs_iodmount[i] = (struct nfsmount *)0;
}
nfs_nhinit(); /* Init the nfsnode table */
#ifndef NFS_NOSERVER
nfsrv_init(0); /* Init server data structures */
nfsrv_initcache(); /* Init the server request cache */
#endif
/*
* Initialize the nqnfs server stuff.
*/
if (nqnfsstarttime == 0) {
nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease
+ nqsrv_clockskew + nqsrv_writeslack;
NQLOADNOVRAM(nqnfsstarttime);
CIRCLEQ_INIT(&nqtimerhead);
nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash);
}
/*
* Initialize reply list and start timer
*/
TAILQ_INIT(&nfs_reqq);
nfs_timer(0);
#ifdef __FreeBSD__
/*
* Set up lease_check and lease_updatetime so that other parts
* of the system can call us, if we are loadable.
*/
#ifndef NFS_NOSERVER
lease_check = nfs_lease_check;
#endif
lease_updatetime = nfs_lease_updatetime;
vfsconf[MOUNT_NFS]->vfc_refcount++; /* make us non-unloadable */
#ifdef VFS_LKM
sysent[SYS_nfssvc].sy_narg = 2;
sysent[SYS_nfssvc].sy_call = nfssvc;
#ifndef NFS_NOSERVER
sysent[SYS_getfh].sy_narg = 2;
sysent[SYS_getfh].sy_call = getfh;
#endif
#endif
#endif
return (0);
}
/*
* Attribute cache routines.
* nfs_loadattrcache() - loads or updates the cache contents from attributes
* that are on the mbuf list
* nfs_getattrcache() - returns valid attributes if found in cache, returns
* error otherwise
*/
/*
* Load the attribute cache (that lives in the nfsnode entry) with
* the values on the mbuf list and
* Iff vap not NULL
* copy the attributes to *vaper
*/
int
nfs_loadattrcache(vpp, mdp, dposp, vaper)
struct vnode **vpp;
struct mbuf **mdp;
caddr_t *dposp;
struct vattr *vaper;
{
register struct vnode *vp = *vpp;
register struct vattr *vap;
register struct nfs_fattr *fp;
register struct nfsnode *np;
register struct nfsnodehashhead *nhpp;
register long t1;
caddr_t cp2;
int error = 0, rdev;
struct mbuf *md;
enum vtype vtyp;
u_short vmode;
struct timespec mtime;
struct vnode *nvp;
int v3 = NFS_ISV3(vp);
md = *mdp;
t1 = (mtod(md, caddr_t) + md->m_len) - *dposp;
if (error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2))
return (error);
fp = (struct nfs_fattr *)cp2;
if (v3) {
vtyp = nfsv3tov_type(fp->fa_type);
vmode = fxdr_unsigned(u_short, fp->fa_mode);
rdev = makedev(fxdr_unsigned(int, fp->fa3_rdev.specdata1),
fxdr_unsigned(int, fp->fa3_rdev.specdata2));
fxdr_nfsv3time(&fp->fa3_mtime, &mtime);
} else {
vtyp = nfsv2tov_type(fp->fa_type);
vmode = fxdr_unsigned(u_short, fp->fa_mode);
/*
* XXX
*
* The duplicate information returned in fa_type and fa_mode
* is an ambiguity in the NFS version 2 protocol.
*
* VREG should be taken literally as a regular file. If a
* server intents to return some type information differently
* in the upper bits of the mode field (e.g. for sockets, or
* FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we
* leave the examination of the mode bits even in the VREG
* case to avoid breakage for bogus servers, but we make sure
* that there are actually type bits set in the upper part of
* fa_mode (and failing that, trust the va_type field).
*
* NFSv3 cleared the issue, and requires fa_mode to not
* contain any type information (while also introduing sockets
* and FIFOs for fa_type).
*/
if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0))
vtyp = IFTOVT(vmode);
rdev = fxdr_unsigned(long, fp->fa2_rdev);
fxdr_nfsv2time(&fp->fa2_mtime, &mtime);
/*
* Really ugly NFSv2 kludge.
*/
if (vtyp == VCHR && rdev == 0xffffffff)
vtyp = VFIFO;
}
/*
* If v_type == VNON it is a new node, so fill in the v_type,
* n_mtime fields. Check to see if it represents a special
* device, and if so, check for a possible alias. Once the
* correct vnode has been obtained, fill in the rest of the
* information.
*/
np = VTONFS(vp);
if (vp->v_type != vtyp) {
/*
* If we had a lock and it turns out that the vnode
* is an object which we don't want to lock (e.g. VDIR)
* to avoid nasty hanging problems on a server crash,
* then release it here.
*/
if (vtyp != VREG && VOP_ISLOCKED(vp))
VOP_UNLOCK(vp);
vp->v_type = vtyp;
if (vp->v_type == VFIFO) {
vp->v_op = fifo_nfsv2nodeop_p;
}
if (vp->v_type == VCHR || vp->v_type == VBLK) {
vp->v_op = spec_nfsv2nodeop_p;
nvp = checkalias(vp, (dev_t)rdev, vp->v_mount);
if (nvp) {
/*
* Discard unneeded vnode, but save its nfsnode.
*/
LIST_REMOVE(np, n_hash);
nvp->v_data = vp->v_data;
vp->v_data = NULL;
vp->v_op = spec_vnodeop_p;
vrele(vp);
vgone(vp);
/*
* Reinitialize aliased node.
*/
np->n_vnode = nvp;
nhpp = NFSNOHASH(nfs_hash(np->n_fhp, np->n_fhsize));
LIST_INSERT_HEAD(nhpp, np, n_hash);
*vpp = vp = nvp;
}
}
np->n_mtime = mtime.tv_sec;
}
vap = &np->n_vattr;
vap->va_type = vtyp;
vap->va_mode = (vmode & 07777);
vap->va_rdev = (dev_t)rdev;
vap->va_mtime = mtime;
vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
if (v3) {
vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink);
vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid);
vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid);
fxdr_hyper(&fp->fa3_size, &vap->va_size);
vap->va_blocksize = NFS_FABLKSIZE;
fxdr_hyper(&fp->fa3_used, &vap->va_bytes);
vap->va_fileid = fxdr_unsigned(int, fp->fa3_fileid.nfsuquad[1]);
fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime);
fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime);
vap->va_flags = 0;
vap->va_filerev = 0;
} else {
vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink);
vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid);
vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid);
vap->va_size = fxdr_unsigned(u_long, fp->fa2_size);
vap->va_blocksize = fxdr_unsigned(long, fp->fa2_blocksize);
vap->va_bytes = fxdr_unsigned(long, fp->fa2_blocks) * NFS_FABLKSIZE;
vap->va_fileid = fxdr_unsigned(long, fp->fa2_fileid);
fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime);
vap->va_flags = 0;
vap->va_ctime.tv_sec = fxdr_unsigned(long, fp->fa2_ctime.nfsv2_sec);
vap->va_ctime.tv_nsec = 0;
vap->va_gen = fxdr_unsigned(u_long, fp->fa2_ctime.nfsv2_usec);
vap->va_filerev = 0;
}
if (vap->va_size != np->n_size) {
if (vap->va_type == VREG) {
if (np->n_flag & NMODIFIED) {
if (vap->va_size < np->n_size)
vap->va_size = np->n_size;
else
np->n_size = vap->va_size;
} else
np->n_size = vap->va_size;
vnode_pager_setsize(vp, (u_long)np->n_size);
} else
np->n_size = vap->va_size;
}
np->n_attrstamp = time.tv_sec;
if (vaper != NULL) {
bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap));
if (np->n_flag & NCHG) {
if (np->n_flag & NACC)
vaper->va_atime = np->n_atim;
if (np->n_flag & NUPD)
vaper->va_mtime = np->n_mtim;
}
}
return (0);
}
/*
* Check the time stamp
* If the cache is valid, copy contents to *vap and return 0
* otherwise return an error
*/
int
nfs_getattrcache(vp, vaper)
register struct vnode *vp;
struct vattr *vaper;
{
register struct nfsnode *np = VTONFS(vp);
register struct vattr *vap;
if ((time.tv_sec - np->n_attrstamp) >= NFS_ATTRTIMEO(np)) {
nfsstats.attrcache_misses++;
return (ENOENT);
}
nfsstats.attrcache_hits++;
vap = &np->n_vattr;
if (vap->va_size != np->n_size) {
if (vap->va_type == VREG) {
if (np->n_flag & NMODIFIED) {
if (vap->va_size < np->n_size)
vap->va_size = np->n_size;
else
np->n_size = vap->va_size;
} else
np->n_size = vap->va_size;
vnode_pager_setsize(vp, (u_long)np->n_size);
} else
np->n_size = vap->va_size;
}
bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr));
if (np->n_flag & NCHG) {
if (np->n_flag & NACC)
vaper->va_atime = np->n_atim;
if (np->n_flag & NUPD)
vaper->va_mtime = np->n_mtim;
}
return (0);
}
#ifndef NFS_NOSERVER
/*
* Set up nameidata for a lookup() call and do it
*/
int
nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag)
register struct nameidata *ndp;
fhandle_t *fhp;
int len;
struct nfssvc_sock *slp;
struct mbuf *nam;
struct mbuf **mdp;
caddr_t *dposp;
struct vnode **retdirp;
struct proc *p;
int kerbflag;
{
register int i, rem;
register struct mbuf *md;
register char *fromcp, *tocp;
struct vnode *dp;
int error, rdonly;
struct componentname *cnp = &ndp->ni_cnd;
*retdirp = (struct vnode *)0;
MALLOC(cnp->cn_pnbuf, char *, len + 1, M_NAMEI, M_WAITOK);
/*
* Copy the name from the mbuf list to ndp->ni_pnbuf
* and set the various ndp fields appropriately.
*/
fromcp = *dposp;
tocp = cnp->cn_pnbuf;
md = *mdp;
rem = mtod(md, caddr_t) + md->m_len - fromcp;
cnp->cn_hash = 0;
for (i = 0; i < len; i++) {
while (rem == 0) {
md = md->m_next;
if (md == NULL) {
error = EBADRPC;
goto out;
}
fromcp = mtod(md, caddr_t);
rem = md->m_len;
}
if (*fromcp == '\0' || *fromcp == '/') {
error = EACCES;
goto out;
}
cnp->cn_hash += (unsigned char)*fromcp;
*tocp++ = *fromcp++;
rem--;
}
*tocp = '\0';
*mdp = md;
*dposp = fromcp;
len = nfsm_rndup(len)-len;
if (len > 0) {
if (rem >= len)
*dposp += len;
else if (error = nfs_adv(mdp, dposp, len, rem))
goto out;
}
ndp->ni_pathlen = tocp - cnp->cn_pnbuf;
cnp->cn_nameptr = cnp->cn_pnbuf;
/*
* Extract and set starting directory.
*/
if (error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp,
nam, &rdonly, kerbflag))
goto out;
if (dp->v_type != VDIR) {
vrele(dp);
error = ENOTDIR;
goto out;
}
VREF(dp);
*retdirp = dp;
ndp->ni_startdir = dp;
if (rdonly)
cnp->cn_flags |= (NOCROSSMOUNT | RDONLY);
else
cnp->cn_flags |= NOCROSSMOUNT;
/*
* And call lookup() to do the real work
*/
cnp->cn_proc = p;
if (error = lookup(ndp))
goto out;
/*
* Check for encountering a symbolic link
*/
if (cnp->cn_flags & ISSYMLINK) {
if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1)
vput(ndp->ni_dvp);
else
vrele(ndp->ni_dvp);
vput(ndp->ni_vp);
ndp->ni_vp = NULL;
error = EINVAL;
goto out;
}
nfsrv_object_create(ndp->ni_vp);
/*
* Check for saved name request
*/
if (cnp->cn_flags & (SAVENAME | SAVESTART)) {
cnp->cn_flags |= HASBUF;
return (0);
}
out:
FREE(cnp->cn_pnbuf, M_NAMEI);
return (error);
}
/*
* A fiddled version of m_adj() that ensures null fill to a long
* boundary and only trims off the back end
*/
void
nfsm_adj(mp, len, nul)
struct mbuf *mp;
register int len;
int nul;
{
register struct mbuf *m;
register int count, i;
register char *cp;
/*
* Trim from tail. Scan the mbuf chain,
* calculating its length and finding the last mbuf.
* If the adjustment only affects this mbuf, then just
* adjust and return. Otherwise, rescan and truncate
* after the remaining size.
*/
count = 0;
m = mp;
for (;;) {
count += m->m_len;
if (m->m_next == (struct mbuf *)0)
break;
m = m->m_next;
}
if (m->m_len > len) {
m->m_len -= len;
if (nul > 0) {
cp = mtod(m, caddr_t)+m->m_len-nul;
for (i = 0; i < nul; i++)
*cp++ = '\0';
}
return;
}
count -= len;
if (count < 0)
count = 0;
/*
* Correct length for chain is "count".
* Find the mbuf with last data, adjust its length,
* and toss data from remaining mbufs on chain.
*/
for (m = mp; m; m = m->m_next) {
if (m->m_len >= count) {
m->m_len = count;
if (nul > 0) {
cp = mtod(m, caddr_t)+m->m_len-nul;
for (i = 0; i < nul; i++)
*cp++ = '\0';
}
break;
}
count -= m->m_len;
}
for (m = m->m_next;m;m = m->m_next)
m->m_len = 0;
}
/*
* Make these functions instead of macros, so that the kernel text size
* doesn't get too big...
*/
void
nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp)
struct nfsrv_descript *nfsd;
int before_ret;
register struct vattr *before_vap;
int after_ret;
struct vattr *after_vap;
struct mbuf **mbp;
char **bposp;
{
register struct mbuf *mb = *mbp, *mb2;
register char *bpos = *bposp;
register u_long *tl;
if (before_ret) {
nfsm_build(tl, u_long *, NFSX_UNSIGNED);
*tl = nfs_false;
} else {
nfsm_build(tl, u_long *, 7 * NFSX_UNSIGNED);
*tl++ = nfs_true;
txdr_hyper(&(before_vap->va_size), tl);
tl += 2;
txdr_nfsv3time(&(before_vap->va_mtime), tl);
tl += 2;
txdr_nfsv3time(&(before_vap->va_ctime), tl);
}
*bposp = bpos;
*mbp = mb;
nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp);
}
void
nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp)
struct nfsrv_descript *nfsd;
int after_ret;
struct vattr *after_vap;
struct mbuf **mbp;
char **bposp;
{
register struct mbuf *mb = *mbp, *mb2;
register char *bpos = *bposp;
register u_long *tl;
register struct nfs_fattr *fp;
if (after_ret) {
nfsm_build(tl, u_long *, NFSX_UNSIGNED);
*tl = nfs_false;
} else {
nfsm_build(tl, u_long *, NFSX_UNSIGNED + NFSX_V3FATTR);
*tl++ = nfs_true;
fp = (struct nfs_fattr *)tl;
nfsm_srvfattr(nfsd, after_vap, fp);
}
*mbp = mb;
*bposp = bpos;
}
void
nfsm_srvfattr(nfsd, vap, fp)
register struct nfsrv_descript *nfsd;
register struct vattr *vap;
register struct nfs_fattr *fp;
{
fp->fa_nlink = txdr_unsigned(vap->va_nlink);
fp->fa_uid = txdr_unsigned(vap->va_uid);
fp->fa_gid = txdr_unsigned(vap->va_gid);
if (nfsd->nd_flag & ND_NFSV3) {
fp->fa_type = vtonfsv3_type(vap->va_type);
fp->fa_mode = vtonfsv3_mode(vap->va_mode);
txdr_hyper(&vap->va_size, &fp->fa3_size);
txdr_hyper(&vap->va_bytes, &fp->fa3_used);
fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev));
fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev));
fp->fa3_fsid.nfsuquad[0] = 0;
fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid);
fp->fa3_fileid.nfsuquad[0] = 0;
fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid);
txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime);
txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime);
txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime);
} else {
fp->fa_type = vtonfsv2_type(vap->va_type);
fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
fp->fa2_size = txdr_unsigned(vap->va_size);
fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize);
if (vap->va_type == VFIFO)
fp->fa2_rdev = 0xffffffff;
else
fp->fa2_rdev = txdr_unsigned(vap->va_rdev);
fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE);
fp->fa2_fsid = txdr_unsigned(vap->va_fsid);
fp->fa2_fileid = txdr_unsigned(vap->va_fileid);
txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime);
txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime);
txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime);
}
}
/*
* nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked)
* - look up fsid in mount list (if not found ret error)
* - get vp and export rights by calling VFS_FHTOVP()
* - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon
* - if not lockflag unlock it with VOP_UNLOCK()
*/
int
nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag)
fhandle_t *fhp;
int lockflag;
struct vnode **vpp;
struct ucred *cred;
struct nfssvc_sock *slp;
struct mbuf *nam;
int *rdonlyp;
int kerbflag;
{
register struct mount *mp;
register int i;
struct ucred *credanon;
int error, exflags;
*vpp = (struct vnode *)0;
mp = getvfs(&fhp->fh_fsid);
if (!mp)
return (ESTALE);
error = VFS_FHTOVP(mp, &fhp->fh_fid, nam, vpp, &exflags, &credanon);
if (error)
return (error);
/*
* Check/setup credentials.
*/
if (exflags & MNT_EXKERB) {
if (!kerbflag) {
vput(*vpp);
return (NFSERR_AUTHERR | AUTH_TOOWEAK);
}
} else if (kerbflag) {
vput(*vpp);
return (NFSERR_AUTHERR | AUTH_TOOWEAK);
} else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) {
cred->cr_uid = credanon->cr_uid;
for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++)
cred->cr_groups[i] = credanon->cr_groups[i];
cred->cr_ngroups = i;
}
if (exflags & MNT_EXRDONLY)
*rdonlyp = 1;
else
*rdonlyp = 0;
nfsrv_object_create(*vpp);
if (!lockflag)
VOP_UNLOCK(*vpp);
return (0);
}
#endif /* NFS_NOSERVER */
/*
* This function compares two net addresses by family and returns TRUE
* if they are the same host.
* If there is any doubt, return FALSE.
* The AF_INET family is handled as a special case so that address mbufs
* don't need to be saved to store "struct in_addr", which is only 4 bytes.
*/
int
netaddr_match(family, haddr, nam)
int family;
union nethostaddr *haddr;
struct mbuf *nam;
{
register struct sockaddr_in *inetaddr;
switch (family) {
case AF_INET:
inetaddr = mtod(nam, struct sockaddr_in *);
if (inetaddr->sin_family == AF_INET &&
inetaddr->sin_addr.s_addr == haddr->had_inetaddr)
return (1);
break;
#ifdef ISO
case AF_ISO:
{
register struct sockaddr_iso *isoaddr1, *isoaddr2;
isoaddr1 = mtod(nam, struct sockaddr_iso *);
isoaddr2 = mtod(haddr->had_nam, struct sockaddr_iso *);
if (isoaddr1->siso_family == AF_ISO &&
isoaddr1->siso_nlen > 0 &&
isoaddr1->siso_nlen == isoaddr2->siso_nlen &&
SAME_ISOADDR(isoaddr1, isoaddr2))
return (1);
break;
}
#endif /* ISO */
default:
break;
};
return (0);
}
static nfsuint64 nfs_nullcookie = { 0, 0 };
/*
* This function finds the directory cookie that corresponds to the
* logical byte offset given.
*/
nfsuint64 *
nfs_getcookie(np, off, add)
register struct nfsnode *np;
off_t off;
int add;
{
register struct nfsdmap *dp, *dp2;
register int pos;
pos = off / NFS_DIRBLKSIZ;
if (pos == 0) {
#ifdef DIAGNOSTIC
if (add)
panic("nfs getcookie add at 0");
#endif
return (&nfs_nullcookie);
}
pos--;
dp = np->n_cookies.lh_first;
if (!dp) {
if (add) {
MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap),
M_NFSDIROFF, M_WAITOK);
dp->ndm_eocookie = 0;
LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list);
} else
return ((nfsuint64 *)0);
}
while (pos >= NFSNUMCOOKIES) {
pos -= NFSNUMCOOKIES;
if (dp->ndm_list.le_next) {
if (!add && dp->ndm_eocookie < NFSNUMCOOKIES &&
pos >= dp->ndm_eocookie)
return ((nfsuint64 *)0);
dp = dp->ndm_list.le_next;
} else if (add) {
MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap),
M_NFSDIROFF, M_WAITOK);
dp2->ndm_eocookie = 0;
LIST_INSERT_AFTER(dp, dp2, ndm_list);
dp = dp2;
} else
return ((nfsuint64 *)0);
}
if (pos >= dp->ndm_eocookie) {
if (add)
dp->ndm_eocookie = pos + 1;
else
return ((nfsuint64 *)0);
}
return (&dp->ndm_cookies[pos]);
}
/*
* Invalidate cached directory information, except for the actual directory
* blocks (which are invalidated separately).
* Done mainly to avoid the use of stale offset cookies.
*/
void
nfs_invaldir(vp)
register struct vnode *vp;
{
register struct nfsnode *np = VTONFS(vp);
#ifdef DIAGNOSTIC
if (vp->v_type != VDIR)
panic("nfs: invaldir not dir");
#endif
np->n_direofoffset = 0;
np->n_cookieverf.nfsuquad[0] = 0;
np->n_cookieverf.nfsuquad[1] = 0;
if (np->n_cookies.lh_first)
np->n_cookies.lh_first->ndm_eocookie = 0;
}
/*
* The write verifier has changed (probably due to a server reboot), so all
* B_NEEDCOMMIT blocks will have to be written again. Since they are on the
* dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT
* flag. Once done the new write verifier can be set for the mount point.
*/
void
nfs_clearcommit(mp)
struct mount *mp;
{
register struct vnode *vp, *nvp;
register struct buf *bp, *nbp;
int s;
s = splbio();
loop:
for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) {
if (vp->v_mount != mp) /* Paranoia */
goto loop;
nvp = vp->v_mntvnodes.le_next;
for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) {
nbp = bp->b_vnbufs.le_next;
if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT))
== (B_DELWRI | B_NEEDCOMMIT))
bp->b_flags &= ~B_NEEDCOMMIT;
}
}
splx(s);
}
#ifndef NFS_NOSERVER
/*
* Map errnos to NFS error numbers. For Version 3 also filter out error
* numbers not specified for the associated procedure.
*/
int
nfsrv_errmap(nd, err)
struct nfsrv_descript *nd;
register int err;
{
register short *defaulterrp, *errp;
if (nd->nd_flag & ND_NFSV3) {
if (nd->nd_procnum <= NFSPROC_COMMIT) {
errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum];
while (*++errp) {
if (*errp == err)
return (err);
else if (*errp > err)
break;
}
return ((int)*defaulterrp);
} else
return (err & 0xffff);
}
if (err <= ELAST)
return ((int)nfsrv_v2errmap[err - 1]);
return (NFSERR_IO);
}
int
nfsrv_object_create(struct vnode *vp) {
if ((vp == NULL) || (vp->v_type != VREG))
return 1;
return vfs_object_create(vp, curproc, curproc?curproc->p_ucred:NULL, 1);
}
#endif /* NFS_NOSERVER */
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