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nfs_serv.c revision 1.138
      1  1.138  dholland /*	$NetBSD: nfs_serv.c,v 1.138 2008/03/28 05:02:08 dholland Exp $	*/
      2   1.16       cgd 
      3    1.1       cgd /*
      4   1.15   mycroft  * Copyright (c) 1989, 1993
      5   1.15   mycroft  *	The Regents of the University of California.  All rights reserved.
      6    1.1       cgd  *
      7    1.1       cgd  * This code is derived from software contributed to Berkeley by
      8    1.1       cgd  * Rick Macklem at The University of Guelph.
      9    1.1       cgd  *
     10    1.1       cgd  * Redistribution and use in source and binary forms, with or without
     11    1.1       cgd  * modification, are permitted provided that the following conditions
     12    1.1       cgd  * are met:
     13    1.1       cgd  * 1. Redistributions of source code must retain the above copyright
     14    1.1       cgd  *    notice, this list of conditions and the following disclaimer.
     15    1.1       cgd  * 2. Redistributions in binary form must reproduce the above copyright
     16    1.1       cgd  *    notice, this list of conditions and the following disclaimer in the
     17    1.1       cgd  *    documentation and/or other materials provided with the distribution.
     18   1.81       agc  * 3. Neither the name of the University nor the names of its contributors
     19    1.1       cgd  *    may be used to endorse or promote products derived from this software
     20    1.1       cgd  *    without specific prior written permission.
     21    1.1       cgd  *
     22    1.1       cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23    1.1       cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24    1.1       cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25    1.1       cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26    1.1       cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27    1.1       cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28    1.1       cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29    1.1       cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30    1.1       cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31    1.1       cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32    1.1       cgd  * SUCH DAMAGE.
     33    1.1       cgd  *
     34   1.42      fvdl  *	@(#)nfs_serv.c	8.8 (Berkeley) 7/31/95
     35    1.1       cgd  */
     36    1.1       cgd 
     37    1.1       cgd /*
     38   1.23      fvdl  * nfs version 2 and 3 server calls to vnode ops
     39    1.1       cgd  * - these routines generally have 3 phases
     40    1.1       cgd  *   1 - break down and validate rpc request in mbuf list
     41    1.1       cgd  *   2 - do the vnode ops for the request
     42    1.1       cgd  *       (surprisingly ?? many are very similar to syscalls in vfs_syscalls.c)
     43    1.1       cgd  *   3 - build the rpc reply in an mbuf list
     44    1.1       cgd  *   nb:
     45    1.1       cgd  *	- do not mix the phases, since the nfsm_?? macros can return failures
     46    1.1       cgd  *	  on a bad rpc or similar and do not do any vrele() or vput()'s
     47    1.1       cgd  *
     48    1.1       cgd  *      - the nfsm_reply() macro generates an nfs rpc reply with the nfs
     49    1.1       cgd  *	error number iff error != 0 whereas
     50    1.1       cgd  *	returning an error from the server function implies a fatal error
     51    1.1       cgd  *	such as a badly constructed rpc request that should be dropped without
     52    1.1       cgd  *	a reply.
     53   1.23      fvdl  *	For Version 3, nfsm_reply() does not return for the error case, since
     54   1.23      fvdl  *	most version 3 rpcs return more than the status for error cases.
     55    1.1       cgd  */
     56   1.62     lukem 
     57   1.62     lukem #include <sys/cdefs.h>
     58  1.138  dholland __KERNEL_RCSID(0, "$NetBSD: nfs_serv.c,v 1.138 2008/03/28 05:02:08 dholland Exp $");
     59   1.41       mrg 
     60   1.10   mycroft #include <sys/param.h>
     61   1.10   mycroft #include <sys/systm.h>
     62   1.10   mycroft #include <sys/proc.h>
     63   1.10   mycroft #include <sys/file.h>
     64   1.10   mycroft #include <sys/namei.h>
     65   1.10   mycroft #include <sys/vnode.h>
     66   1.10   mycroft #include <sys/mount.h>
     67   1.23      fvdl #include <sys/socket.h>
     68   1.23      fvdl #include <sys/socketvar.h>
     69   1.10   mycroft #include <sys/mbuf.h>
     70   1.15   mycroft #include <sys/dirent.h>
     71   1.15   mycroft #include <sys/stat.h>
     72   1.23      fvdl #include <sys/kernel.h>
     73  1.117      yamt #include <sys/hash.h>
     74  1.109      elad #include <sys/kauth.h>
     75    1.1       cgd 
     76   1.72      yamt #include <uvm/uvm.h>
     77   1.40       mrg 
     78   1.23      fvdl #include <nfs/nfsproto.h>
     79   1.15   mycroft #include <nfs/rpcv2.h>
     80   1.10   mycroft #include <nfs/nfs.h>
     81   1.10   mycroft #include <nfs/xdr_subs.h>
     82   1.10   mycroft #include <nfs/nfsm_subs.h>
     83   1.22  christos #include <nfs/nfs_var.h>
     84    1.1       cgd 
     85    1.1       cgd /* Global vars */
     86   1.19       cgd extern u_int32_t nfs_xdrneg1;
     87   1.19       cgd extern u_int32_t nfs_false, nfs_true;
     88  1.135      matt extern const enum vtype nv3tov_type[8];
     89   1.23      fvdl extern struct nfsstats nfsstats;
     90   1.66      matt extern const nfstype nfsv2_type[9];
     91   1.66      matt extern const nfstype nfsv3_type[9];
     92   1.23      fvdl int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000;
     93   1.72      yamt int nfsd_use_loan = 1;	/* use page-loan for READ OP */
     94    1.1       cgd 
     95  1.121      yamt #define	nqsrv_getl(vp, rw)	/* nothing */
     96  1.121      yamt 
     97   1.15   mycroft /*
     98   1.23      fvdl  * nfs v3 access service
     99   1.15   mycroft  */
    100   1.22  christos int
    101   1.99  christos nfsrv3_access(nfsd, slp, lwp, mrq)
    102   1.23      fvdl 	struct nfsrv_descript *nfsd;
    103   1.23      fvdl 	struct nfssvc_sock *slp;
    104   1.99  christos 	struct lwp *lwp;
    105   1.23      fvdl 	struct mbuf **mrq;
    106   1.15   mycroft {
    107   1.23      fvdl 	struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
    108   1.23      fvdl 	struct mbuf *nam = nfsd->nd_nam;
    109  1.126  christos 	char *dpos = nfsd->nd_dpos;
    110  1.109      elad 	kauth_cred_t cred = nfsd->nd_cr;
    111   1.15   mycroft 	struct vnode *vp;
    112  1.117      yamt 	nfsrvfh_t nsfh;
    113   1.54  augustss 	u_int32_t *tl;
    114   1.54  augustss 	int32_t t1;
    115  1.126  christos 	char *bpos;
    116   1.23      fvdl 	int error = 0, rdonly, cache = 0, getret;
    117   1.15   mycroft 	char *cp2;
    118   1.67      matt 	struct mbuf *mb, *mreq;
    119   1.23      fvdl 	struct vattr va;
    120   1.32   mycroft 	u_long inmode, testmode, outmode;
    121   1.15   mycroft 	u_quad_t frev;
    122   1.15   mycroft 
    123  1.117      yamt 	nfsm_srvmtofh(&nsfh);
    124   1.23      fvdl 	nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
    125  1.117      yamt 	error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly,
    126  1.125   thorpej 	    (nfsd->nd_flag & ND_KERBAUTH), false);
    127   1.23      fvdl 	if (error) {
    128   1.23      fvdl 		nfsm_reply(NFSX_UNSIGNED);
    129   1.23      fvdl 		nfsm_srvpostop_attr(1, (struct vattr *)0);
    130   1.23      fvdl 		return (0);
    131   1.23      fvdl 	}
    132   1.32   mycroft 	inmode = fxdr_unsigned(u_int32_t, *tl);
    133   1.32   mycroft 	outmode = 0;
    134   1.32   mycroft 	if ((inmode & NFSV3ACCESS_READ) &&
    135   1.99  christos 	    nfsrv_access(vp, VREAD, cred, rdonly, lwp, 0) == 0)
    136   1.32   mycroft 		outmode |= NFSV3ACCESS_READ;
    137   1.32   mycroft 	if (vp->v_type != VDIR) {
    138   1.32   mycroft 		testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND);
    139   1.32   mycroft 		if (testmode &&
    140   1.99  christos 		    nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0)
    141   1.32   mycroft 			outmode |= testmode;
    142   1.32   mycroft 		if ((inmode & NFSV3ACCESS_EXECUTE) &&
    143   1.99  christos 		    nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0)
    144   1.32   mycroft 			outmode |= NFSV3ACCESS_EXECUTE;
    145   1.32   mycroft 	} else {
    146   1.32   mycroft 		testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND |
    147   1.32   mycroft 		    NFSV3ACCESS_DELETE);
    148   1.32   mycroft 		if (testmode &&
    149   1.99  christos 		    nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0)
    150   1.32   mycroft 			outmode |= testmode;
    151   1.32   mycroft 		if ((inmode & NFSV3ACCESS_LOOKUP) &&
    152   1.99  christos 		    nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0)
    153   1.32   mycroft 			outmode |= NFSV3ACCESS_LOOKUP;
    154   1.32   mycroft 	}
    155  1.131     pooka 	getret = VOP_GETATTR(vp, &va, cred);
    156   1.15   mycroft 	vput(vp);
    157   1.23      fvdl 	nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED);
    158   1.23      fvdl 	nfsm_srvpostop_attr(getret, &va);
    159   1.23      fvdl 	nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
    160   1.32   mycroft 	*tl = txdr_unsigned(outmode);
    161   1.15   mycroft 	nfsm_srvdone;
    162   1.15   mycroft }
    163   1.15   mycroft 
    164    1.1       cgd /*
    165    1.1       cgd  * nfs getattr service
    166    1.1       cgd  */
    167   1.22  christos int
    168   1.99  christos nfsrv_getattr(nfsd, slp, lwp, mrq)
    169   1.23      fvdl 	struct nfsrv_descript *nfsd;
    170   1.23      fvdl 	struct nfssvc_sock *slp;
    171   1.99  christos 	struct lwp *lwp;
    172   1.23      fvdl 	struct mbuf **mrq;
    173    1.1       cgd {
    174   1.23      fvdl 	struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
    175   1.23      fvdl 	struct mbuf *nam = nfsd->nd_nam;
    176  1.126  christos 	char *dpos = nfsd->nd_dpos;
    177  1.109      elad 	kauth_cred_t cred = nfsd->nd_cr;
    178   1.54  augustss 	struct nfs_fattr *fp;
    179    1.1       cgd 	struct vattr va;
    180    1.1       cgd 	struct vnode *vp;
    181  1.117      yamt 	nfsrvfh_t nsfh;
    182   1.54  augustss 	u_int32_t *tl;
    183   1.54  augustss 	int32_t t1;
    184  1.126  christos 	char *bpos;
    185  1.103  christos 	int error = 0, rdonly, cache = 0;
    186    1.1       cgd 	char *cp2;
    187   1.67      matt 	struct mbuf *mb, *mreq;
    188   1.15   mycroft 	u_quad_t frev;
    189    1.1       cgd 
    190  1.117      yamt 	nfsm_srvmtofh(&nsfh);
    191  1.117      yamt 	error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly,
    192  1.125   thorpej 	    (nfsd->nd_flag & ND_KERBAUTH), false);
    193   1.23      fvdl 	if (error) {
    194    1.1       cgd 		nfsm_reply(0);
    195   1.23      fvdl 		return (0);
    196   1.23      fvdl 	}
    197   1.23      fvdl 	nqsrv_getl(vp, ND_READ);
    198  1.131     pooka 	error = VOP_GETATTR(vp, &va, cred);
    199    1.1       cgd 	vput(vp);
    200   1.23      fvdl 	nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3));
    201   1.23      fvdl 	if (error)
    202   1.23      fvdl 		return (0);
    203   1.23      fvdl 	nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3));
    204   1.23      fvdl 	nfsm_srvfillattr(&va, fp);
    205    1.1       cgd 	nfsm_srvdone;
    206    1.1       cgd }
    207    1.1       cgd 
    208    1.1       cgd /*
    209    1.1       cgd  * nfs setattr service
    210    1.1       cgd  */
    211   1.22  christos int
    212   1.99  christos nfsrv_setattr(nfsd, slp, lwp, mrq)
    213   1.23      fvdl 	struct nfsrv_descript *nfsd;
    214   1.23      fvdl 	struct nfssvc_sock *slp;
    215   1.99  christos 	struct lwp *lwp;
    216   1.23      fvdl 	struct mbuf **mrq;
    217    1.1       cgd {
    218   1.23      fvdl 	struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
    219   1.23      fvdl 	struct mbuf *nam = nfsd->nd_nam;
    220  1.126  christos 	char *dpos = nfsd->nd_dpos;
    221  1.109      elad 	kauth_cred_t cred = nfsd->nd_cr;
    222   1.23      fvdl 	struct vattr va, preat;
    223   1.54  augustss 	struct nfsv2_sattr *sp;
    224   1.54  augustss 	struct nfs_fattr *fp;
    225    1.1       cgd 	struct vnode *vp;
    226  1.117      yamt 	nfsrvfh_t nsfh;
    227   1.54  augustss 	u_int32_t *tl;
    228   1.54  augustss 	int32_t t1;
    229  1.126  christos 	char *bpos;
    230  1.103  christos 	int error = 0, rdonly, cache = 0, preat_ret = 1, postat_ret = 1;
    231   1.23      fvdl 	int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0;
    232    1.1       cgd 	char *cp2;
    233   1.67      matt 	struct mbuf *mb, *mreq;
    234   1.23      fvdl 	u_quad_t frev;
    235   1.23      fvdl 	struct timespec guard;
    236    1.1       cgd 
    237  1.108       mrg 	memset(&guard, 0, sizeof guard);	/* XXX gcc */
    238  1.108       mrg 
    239  1.117      yamt 	nfsm_srvmtofh(&nsfh);
    240   1.18   mycroft 	VATTR_NULL(&va);
    241   1.23      fvdl 	if (v3) {
    242  1.127      yamt 		nfsm_srvsattr(&va);
    243   1.23      fvdl 		nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
    244   1.23      fvdl 		gcheck = fxdr_unsigned(int, *tl);
    245   1.23      fvdl 		if (gcheck) {
    246   1.23      fvdl 			nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
    247   1.23      fvdl 			fxdr_nfsv3time(tl, &guard);
    248   1.23      fvdl 		}
    249   1.23      fvdl 	} else {
    250   1.23      fvdl 		nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
    251   1.23      fvdl 		/*
    252   1.23      fvdl 		 * Nah nah nah nah na nah
    253   1.23      fvdl 		 * There is a bug in the Sun client that puts 0xffff in the mode
    254   1.23      fvdl 		 * field of sattr when it should put in 0xffffffff. The u_short
    255   1.23      fvdl 		 * doesn't sign extend.
    256   1.23      fvdl 		 * --> check the low order 2 bytes for 0xffff
    257   1.23      fvdl 		 */
    258   1.23      fvdl 		if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff)
    259   1.23      fvdl 			va.va_mode = nfstov_mode(sp->sa_mode);
    260   1.23      fvdl 		if (sp->sa_uid != nfs_xdrneg1)
    261   1.23      fvdl 			va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid);
    262   1.23      fvdl 		if (sp->sa_gid != nfs_xdrneg1)
    263   1.23      fvdl 			va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid);
    264   1.23      fvdl 		if (sp->sa_size != nfs_xdrneg1)
    265   1.23      fvdl 			va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size);
    266   1.23      fvdl 		if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) {
    267   1.15   mycroft #ifdef notyet
    268   1.23      fvdl 			fxdr_nfsv2time(&sp->sa_atime, &va.va_atime);
    269   1.15   mycroft #else
    270   1.20       jtc 			va.va_atime.tv_sec =
    271   1.23      fvdl 				fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec);
    272   1.20       jtc 			va.va_atime.tv_nsec = 0;
    273   1.15   mycroft #endif
    274   1.15   mycroft 		}
    275   1.23      fvdl 		if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1)
    276   1.23      fvdl 			fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime);
    277   1.23      fvdl 
    278   1.23      fvdl 	}
    279   1.23      fvdl 
    280   1.23      fvdl 	/*
    281   1.23      fvdl 	 * Now that we have all the fields, lets do it.
    282   1.23      fvdl 	 */
    283  1.117      yamt 	error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly,
    284  1.125   thorpej 	    (nfsd->nd_flag & ND_KERBAUTH), false);
    285   1.23      fvdl 	if (error) {
    286   1.23      fvdl 		nfsm_reply(2 * NFSX_UNSIGNED);
    287   1.23      fvdl 		nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va);
    288   1.23      fvdl 		return (0);
    289   1.23      fvdl 	}
    290   1.23      fvdl 	nqsrv_getl(vp, ND_WRITE);
    291   1.23      fvdl 	if (v3) {
    292  1.131     pooka 		error = preat_ret = VOP_GETATTR(vp, &preat, cred);
    293   1.23      fvdl 		if (!error && gcheck &&
    294   1.23      fvdl 			(preat.va_ctime.tv_sec != guard.tv_sec ||
    295   1.23      fvdl 			 preat.va_ctime.tv_nsec != guard.tv_nsec))
    296   1.23      fvdl 			error = NFSERR_NOT_SYNC;
    297   1.23      fvdl 		if (error) {
    298   1.23      fvdl 			vput(vp);
    299   1.23      fvdl 			nfsm_reply(NFSX_WCCDATA(v3));
    300   1.23      fvdl 			nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va);
    301   1.23      fvdl 			return (0);
    302   1.23      fvdl 		}
    303   1.15   mycroft 	}
    304   1.15   mycroft 
    305    1.1       cgd 	/*
    306   1.15   mycroft 	 * If the size is being changed write acces is required, otherwise
    307   1.15   mycroft 	 * just check for a read only file system.
    308    1.1       cgd 	 */
    309   1.18   mycroft 	if (va.va_size == ((u_quad_t)((quad_t) -1))) {
    310   1.15   mycroft 		if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) {
    311   1.15   mycroft 			error = EROFS;
    312   1.15   mycroft 			goto out;
    313   1.15   mycroft 		}
    314   1.15   mycroft 	} else {
    315   1.15   mycroft 		if (vp->v_type == VDIR) {
    316   1.15   mycroft 			error = EISDIR;
    317   1.15   mycroft 			goto out;
    318   1.22  christos 		} else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly,
    319   1.99  christos 			lwp, 0)) != 0)
    320   1.15   mycroft 			goto out;
    321    1.1       cgd 	}
    322  1.131     pooka 	error = VOP_SETATTR(vp, &va, cred);
    323  1.131     pooka 	postat_ret = VOP_GETATTR(vp, &va, cred);
    324   1.23      fvdl 	if (!error)
    325   1.23      fvdl 		error = postat_ret;
    326    1.1       cgd out:
    327    1.1       cgd 	vput(vp);
    328   1.23      fvdl 	nfsm_reply(NFSX_WCCORFATTR(v3));
    329   1.23      fvdl 	if (v3) {
    330   1.23      fvdl 		nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va);
    331   1.23      fvdl 		return (0);
    332   1.23      fvdl 	} else {
    333   1.23      fvdl 		nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR);
    334   1.23      fvdl 		nfsm_srvfillattr(&va, fp);
    335   1.15   mycroft 	}
    336    1.1       cgd 	nfsm_srvdone;
    337    1.1       cgd }
    338    1.1       cgd 
    339    1.1       cgd /*
    340    1.1       cgd  * nfs lookup rpc
    341    1.1       cgd  */
    342   1.22  christos int
    343   1.99  christos nfsrv_lookup(nfsd, slp, lwp, mrq)
    344   1.23      fvdl 	struct nfsrv_descript *nfsd;
    345   1.23      fvdl 	struct nfssvc_sock *slp;
    346   1.99  christos 	struct lwp *lwp;
    347   1.23      fvdl 	struct mbuf **mrq;
    348    1.1       cgd {
    349   1.23      fvdl 	struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
    350   1.23      fvdl 	struct mbuf *nam = nfsd->nd_nam;
    351  1.126  christos 	char *dpos = nfsd->nd_dpos;
    352  1.109      elad 	kauth_cred_t cred = nfsd->nd_cr;
    353   1.54  augustss 	struct nfs_fattr *fp;
    354   1.35      fvdl 	struct nameidata nd, ind, *ndp = &nd;
    355   1.23      fvdl 	struct vnode *vp, *dirp;
    356  1.117      yamt 	nfsrvfh_t nsfh;
    357  1.126  christos 	char *cp;
    358   1.54  augustss 	u_int32_t *tl;
    359   1.54  augustss 	int32_t t1;
    360  1.126  christos 	char *bpos;
    361  1.103  christos 	int error = 0, cache = 0, dirattr_ret = 1;
    362   1.68      yamt 	uint32_t len;
    363   1.35      fvdl 	int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag;
    364    1.1       cgd 	char *cp2;
    365   1.67      matt 	struct mbuf *mb, *mreq;
    366   1.23      fvdl 	struct vattr va, dirattr;
    367   1.23      fvdl 	u_quad_t frev;
    368    1.1       cgd 
    369  1.117      yamt 	nfsm_srvmtofh(&nsfh);
    370   1.23      fvdl 	nfsm_srvnamesiz(len);
    371   1.35      fvdl 
    372  1.117      yamt 	pubflag = nfs_ispublicfh(&nsfh);
    373   1.35      fvdl 
    374   1.15   mycroft 	nd.ni_cnd.cn_cred = cred;
    375   1.15   mycroft 	nd.ni_cnd.cn_nameiop = LOOKUP;
    376   1.15   mycroft 	nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART;
    377  1.117      yamt 	error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos,
    378   1.99  christos 		&dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), pubflag);
    379   1.35      fvdl 
    380   1.35      fvdl 	if (!error && pubflag) {
    381   1.35      fvdl 		if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL) {
    382   1.35      fvdl 			/*
    383   1.35      fvdl 			 * Setup call to lookup() to see if we can find
    384   1.35      fvdl 			 * the index file. Arguably, this doesn't belong
    385   1.35      fvdl 			 * in a kernel.. Ugh.
    386   1.35      fvdl 			 */
    387   1.35      fvdl 			ind = nd;
    388   1.42      fvdl 			VOP_UNLOCK(nd.ni_vp, 0);
    389   1.35      fvdl 			ind.ni_pathlen = strlen(nfs_pub.np_index);
    390   1.35      fvdl 			ind.ni_cnd.cn_nameptr = ind.ni_cnd.cn_pnbuf =
    391   1.35      fvdl 			    nfs_pub.np_index;
    392   1.35      fvdl 			ind.ni_startdir = nd.ni_vp;
    393   1.35      fvdl 			VREF(ind.ni_startdir);
    394   1.35      fvdl 			error = lookup(&ind);
    395   1.35      fvdl 			if (!error) {
    396   1.35      fvdl 				/*
    397   1.35      fvdl 				 * Found an index file. Get rid of
    398   1.35      fvdl 				 * the old references.
    399   1.35      fvdl 				 */
    400   1.94     perry 				if (dirp)
    401   1.35      fvdl 					vrele(dirp);
    402   1.35      fvdl 				dirp = nd.ni_vp;
    403   1.35      fvdl 				vrele(nd.ni_startdir);
    404   1.35      fvdl 				ndp = &ind;
    405   1.35      fvdl 			} else
    406   1.35      fvdl 				error = 0;
    407   1.35      fvdl 		}
    408   1.35      fvdl 		/*
    409   1.35      fvdl 		 * If the public filehandle was used, check that this lookup
    410   1.35      fvdl 		 * didn't result in a filehandle outside the publicly exported
    411   1.35      fvdl 		 * filesystem.
    412   1.35      fvdl 		 */
    413   1.35      fvdl 
    414   1.35      fvdl 		if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) {
    415   1.35      fvdl 			vput(nd.ni_vp);
    416   1.35      fvdl 			error = EPERM;
    417   1.35      fvdl 		}
    418   1.35      fvdl 	}
    419   1.35      fvdl 
    420   1.23      fvdl 	if (dirp) {
    421   1.23      fvdl 		if (v3)
    422  1.131     pooka 			dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred);
    423   1.23      fvdl 		vrele(dirp);
    424   1.23      fvdl 	}
    425   1.35      fvdl 
    426   1.23      fvdl 	if (error) {
    427   1.23      fvdl 		nfsm_reply(NFSX_POSTOPATTR(v3));
    428   1.23      fvdl 		nfsm_srvpostop_attr(dirattr_ret, &dirattr);
    429   1.23      fvdl 		return (0);
    430   1.23      fvdl 	}
    431   1.35      fvdl 
    432   1.35      fvdl 	nqsrv_getl(ndp->ni_startdir, ND_READ);
    433   1.57   thorpej 	PNBUF_PUT(nd.ni_cnd.cn_pnbuf);
    434   1.35      fvdl 	vp = ndp->ni_vp;
    435  1.117      yamt 	error = nfsrv_composefh(vp, &nsfh, v3);
    436   1.23      fvdl 	if (!error)
    437  1.131     pooka 		error = VOP_GETATTR(vp, &va, cred);
    438   1.23      fvdl 	vput(vp);
    439  1.120       chs 	vrele(ndp->ni_startdir);
    440  1.117      yamt 	nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPORFATTR(v3) +
    441  1.117      yamt 	    NFSX_POSTOPATTR(v3));
    442   1.23      fvdl 	if (error) {
    443   1.23      fvdl 		nfsm_srvpostop_attr(dirattr_ret, &dirattr);
    444   1.23      fvdl 		return (0);
    445    1.1       cgd 	}
    446  1.117      yamt 	nfsm_srvfhtom(&nsfh, v3);
    447   1.23      fvdl 	if (v3) {
    448   1.23      fvdl 		nfsm_srvpostop_attr(0, &va);
    449   1.23      fvdl 		nfsm_srvpostop_attr(dirattr_ret, &dirattr);
    450   1.23      fvdl 	} else {
    451   1.23      fvdl 		nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR);
    452   1.23      fvdl 		nfsm_srvfillattr(&va, fp);
    453   1.15   mycroft 	}
    454    1.1       cgd 	nfsm_srvdone;
    455    1.1       cgd }
    456    1.1       cgd 
    457    1.1       cgd /*
    458    1.1       cgd  * nfs readlink service
    459    1.1       cgd  */
    460   1.22  christos int
    461   1.99  christos nfsrv_readlink(nfsd, slp, lwp, mrq)
    462   1.23      fvdl 	struct nfsrv_descript *nfsd;
    463   1.23      fvdl 	struct nfssvc_sock *slp;
    464   1.99  christos 	struct lwp *lwp;
    465   1.23      fvdl 	struct mbuf **mrq;
    466    1.1       cgd {
    467   1.23      fvdl 	struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
    468   1.23      fvdl 	struct mbuf *nam = nfsd->nd_nam;
    469  1.126  christos 	char *dpos = nfsd->nd_dpos;
    470  1.109      elad 	kauth_cred_t cred = nfsd->nd_cr;
    471    1.1       cgd 	struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN];
    472   1.54  augustss 	struct iovec *ivp = iv;
    473   1.54  augustss 	struct mbuf *mp;
    474   1.54  augustss 	u_int32_t *tl;
    475   1.54  augustss 	int32_t t1;
    476  1.126  christos 	char *bpos;
    477  1.103  christos 	int error = 0, rdonly, cache = 0, i, padlen, getret;
    478   1.76      yamt 	uint32_t len;
    479   1.23      fvdl 	int v3 = (nfsd->nd_flag & ND_NFSV3);
    480    1.1       cgd 	char *cp2;
    481   1.67      matt 	struct mbuf *mb, *mp2 = NULL, *mp3 = NULL, *mreq;
    482    1.1       cgd 	struct vnode *vp;
    483   1.23      fvdl 	struct vattr attr;
    484  1.117      yamt 	nfsrvfh_t nsfh;
    485    1.1       cgd 	struct uio io, *uiop = &io;
    486   1.15   mycroft 	u_quad_t frev;
    487    1.1       cgd 
    488  1.117      yamt 	nfsm_srvmtofh(&nsfh);
    489    1.1       cgd 	len = 0;
    490    1.1       cgd 	i = 0;
    491    1.1       cgd 	while (len < NFS_MAXPATHLEN) {
    492   1.67      matt 		mp = m_get(M_WAIT, MT_DATA);
    493   1.67      matt 		MCLAIM(mp, &nfs_mowner);
    494   1.67      matt 		m_clget(mp, M_WAIT);
    495    1.1       cgd 		mp->m_len = NFSMSIZ(mp);
    496    1.1       cgd 		if (len == 0)
    497    1.1       cgd 			mp3 = mp2 = mp;
    498    1.1       cgd 		else {
    499    1.1       cgd 			mp2->m_next = mp;
    500    1.1       cgd 			mp2 = mp;
    501    1.1       cgd 		}
    502    1.1       cgd 		if ((len+mp->m_len) > NFS_MAXPATHLEN) {
    503    1.1       cgd 			mp->m_len = NFS_MAXPATHLEN-len;
    504    1.1       cgd 			len = NFS_MAXPATHLEN;
    505    1.1       cgd 		} else
    506    1.1       cgd 			len += mp->m_len;
    507  1.126  christos 		ivp->iov_base = mtod(mp, void *);
    508    1.1       cgd 		ivp->iov_len = mp->m_len;
    509    1.1       cgd 		i++;
    510    1.1       cgd 		ivp++;
    511    1.1       cgd 	}
    512    1.1       cgd 	uiop->uio_iov = iv;
    513    1.1       cgd 	uiop->uio_iovcnt = i;
    514    1.1       cgd 	uiop->uio_offset = 0;
    515    1.1       cgd 	uiop->uio_resid = len;
    516    1.1       cgd 	uiop->uio_rw = UIO_READ;
    517  1.101      yamt 	UIO_SETUP_SYSSPACE(uiop);
    518  1.117      yamt 	error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam,
    519  1.125   thorpej 		 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false);
    520   1.22  christos 	if (error) {
    521    1.1       cgd 		m_freem(mp3);
    522   1.23      fvdl 		nfsm_reply(2 * NFSX_UNSIGNED);
    523   1.23      fvdl 		nfsm_srvpostop_attr(1, (struct vattr *)0);
    524   1.23      fvdl 		return (0);
    525    1.1       cgd 	}
    526    1.1       cgd 	if (vp->v_type != VLNK) {
    527   1.23      fvdl 		if (v3)
    528   1.23      fvdl 			error = EINVAL;
    529   1.23      fvdl 		else
    530   1.23      fvdl 			error = ENXIO;
    531    1.1       cgd 		goto out;
    532    1.1       cgd 	}
    533   1.23      fvdl 	nqsrv_getl(vp, ND_READ);
    534    1.1       cgd 	error = VOP_READLINK(vp, uiop, cred);
    535    1.1       cgd out:
    536  1.131     pooka 	getret = VOP_GETATTR(vp, &attr, cred);
    537    1.1       cgd 	vput(vp);
    538    1.1       cgd 	if (error)
    539    1.1       cgd 		m_freem(mp3);
    540   1.23      fvdl 	nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED);
    541   1.23      fvdl 	if (v3) {
    542   1.23      fvdl 		nfsm_srvpostop_attr(getret, &attr);
    543   1.23      fvdl 		if (error)
    544   1.23      fvdl 			return (0);
    545   1.23      fvdl 	}
    546   1.76      yamt 	len -= uiop->uio_resid;
    547   1.76      yamt 	padlen = nfsm_padlen(len);
    548   1.76      yamt 	if (uiop->uio_resid || padlen)
    549   1.76      yamt 		nfs_zeropad(mp3, uiop->uio_resid, padlen);
    550   1.19       cgd 	nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
    551    1.1       cgd 	*tl = txdr_unsigned(len);
    552    1.1       cgd 	mb->m_next = mp3;
    553    1.1       cgd 	nfsm_srvdone;
    554    1.1       cgd }
    555    1.1       cgd 
    556    1.1       cgd /*
    557    1.1       cgd  * nfs read service
    558    1.1       cgd  */
    559   1.22  christos int
    560   1.99  christos nfsrv_read(nfsd, slp, lwp, mrq)
    561   1.23      fvdl 	struct nfsrv_descript *nfsd;
    562   1.23      fvdl 	struct nfssvc_sock *slp;
    563   1.99  christos 	struct lwp *lwp;
    564   1.23      fvdl 	struct mbuf **mrq;
    565    1.1       cgd {
    566   1.23      fvdl 	struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
    567   1.23      fvdl 	struct mbuf *nam = nfsd->nd_nam;
    568  1.126  christos 	char *dpos = nfsd->nd_dpos;
    569  1.109      elad 	kauth_cred_t cred = nfsd->nd_cr;
    570   1.54  augustss 	struct mbuf *m;
    571   1.54  augustss 	struct nfs_fattr *fp;
    572   1.54  augustss 	u_int32_t *tl;
    573   1.54  augustss 	int32_t t1;
    574   1.54  augustss 	int i;
    575  1.126  christos 	char *bpos;
    576  1.103  christos 	int error = 0, rdonly, cache = 0, getret;
    577   1.68      yamt 	int v3 = (nfsd->nd_flag & ND_NFSV3);
    578   1.76      yamt 	uint32_t reqlen, len, cnt, left;
    579   1.76      yamt 	int padlen;
    580    1.1       cgd 	char *cp2;
    581   1.67      matt 	struct mbuf *mb, *mreq;
    582    1.1       cgd 	struct vnode *vp;
    583  1.117      yamt 	nfsrvfh_t nsfh;
    584    1.1       cgd 	struct uio io, *uiop = &io;
    585   1.18   mycroft 	struct vattr va;
    586    1.1       cgd 	off_t off;
    587   1.15   mycroft 	u_quad_t frev;
    588    1.1       cgd 
    589  1.117      yamt 	nfsm_srvmtofh(&nsfh);
    590   1.23      fvdl 	if (v3) {
    591   1.23      fvdl 		nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
    592   1.48      fair 		off = fxdr_hyper(tl);
    593   1.23      fvdl 	} else {
    594   1.19       cgd 		nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
    595   1.19       cgd 		off = (off_t)fxdr_unsigned(u_int32_t, *tl);
    596   1.15   mycroft 	}
    597   1.71      yamt 	nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED);
    598   1.71      yamt 	reqlen = fxdr_unsigned(uint32_t, *tl);
    599   1.71      yamt 	reqlen = MIN(reqlen, NFS_SRVMAXDATA(nfsd));
    600  1.117      yamt 	error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam,
    601  1.125   thorpej 		 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false);
    602   1.23      fvdl 	if (error) {
    603   1.23      fvdl 		nfsm_reply(2 * NFSX_UNSIGNED);
    604   1.23      fvdl 		nfsm_srvpostop_attr(1, (struct vattr *)0);
    605   1.23      fvdl 		return (0);
    606   1.23      fvdl 	}
    607   1.15   mycroft 	if (vp->v_type != VREG) {
    608   1.23      fvdl 		if (v3)
    609   1.23      fvdl 			error = EINVAL;
    610   1.23      fvdl 		else
    611   1.23      fvdl 			error = (vp->v_type == VDIR) ? EISDIR : EACCES;
    612    1.1       cgd 	}
    613   1.23      fvdl 	if (!error) {
    614   1.23      fvdl 	    nqsrv_getl(vp, ND_READ);
    615   1.99  christos 	    if ((error = nfsrv_access(vp, VREAD, cred, rdonly, lwp, 1)) != 0)
    616   1.99  christos 		error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 1);
    617   1.23      fvdl 	}
    618  1.131     pooka 	getret = VOP_GETATTR(vp, &va, cred);
    619   1.23      fvdl 	if (!error)
    620   1.23      fvdl 		error = getret;
    621   1.22  christos 	if (error) {
    622    1.1       cgd 		vput(vp);
    623   1.23      fvdl 		nfsm_reply(NFSX_POSTOPATTR(v3));
    624   1.23      fvdl 		nfsm_srvpostop_attr(getret, &va);
    625   1.23      fvdl 		return (0);
    626    1.1       cgd 	}
    627   1.18   mycroft 	if (off >= va.va_size)
    628   1.15   mycroft 		cnt = 0;
    629   1.23      fvdl 	else if ((off + reqlen) > va.va_size)
    630   1.76      yamt 		cnt = va.va_size - off;
    631   1.23      fvdl 	else
    632   1.23      fvdl 		cnt = reqlen;
    633   1.23      fvdl 	nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt));
    634   1.23      fvdl 	if (v3) {
    635   1.23      fvdl 		nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED);
    636   1.23      fvdl 		*tl++ = nfs_true;
    637   1.23      fvdl 		fp = (struct nfs_fattr *)tl;
    638   1.23      fvdl 		tl += (NFSX_V3FATTR / sizeof (u_int32_t));
    639   1.23      fvdl 	} else {
    640   1.23      fvdl 		nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED);
    641   1.23      fvdl 		fp = (struct nfs_fattr *)tl;
    642   1.23      fvdl 		tl += (NFSX_V2FATTR / sizeof (u_int32_t));
    643   1.23      fvdl 	}
    644   1.15   mycroft 	len = left = cnt;
    645   1.73      yamt 	if (cnt > 0) {
    646   1.72      yamt 		if (nfsd_use_loan) {
    647   1.72      yamt 			struct vm_page **pgpp;
    648   1.72      yamt 			voff_t pgoff = trunc_page(off);
    649   1.87      yamt 			int npages;
    650   1.87      yamt 			vaddr_t lva;
    651   1.72      yamt 
    652   1.87      yamt 			npages = (round_page(off + cnt) - pgoff) >> PAGE_SHIFT;
    653   1.87      yamt 			KASSERT(npages <= M_EXT_MAXPAGES); /* XXX */
    654   1.72      yamt 
    655   1.87      yamt 			/* allocate kva for mbuf data */
    656   1.87      yamt 			lva = sokvaalloc(npages << PAGE_SHIFT, slp->ns_so);
    657   1.72      yamt 			if (lva == 0) {
    658   1.72      yamt 				/* fall back to VOP_READ */
    659   1.72      yamt 				goto loan_fail;
    660   1.72      yamt 			}
    661   1.72      yamt 
    662   1.87      yamt 			/* allocate mbuf */
    663   1.72      yamt 			m = m_get(M_WAIT, MT_DATA);
    664   1.87      yamt 			MCLAIM(m, &nfs_mowner);
    665   1.72      yamt 			pgpp = m->m_ext.ext_pgs;
    666   1.75      yamt 
    667   1.87      yamt 			/* loan pages */
    668   1.87      yamt 			error = uvm_loanuobjpages(&vp->v_uobj, pgoff, npages,
    669   1.87      yamt 			    pgpp);
    670   1.87      yamt 			if (error) {
    671   1.87      yamt 				sokvafree(lva, npages << PAGE_SHIFT);
    672   1.87      yamt 				m_free(m);
    673   1.91      yamt 				if (error == EBUSY)
    674   1.91      yamt 					goto loan_fail;
    675   1.87      yamt 				goto read_error;
    676   1.15   mycroft 			}
    677   1.72      yamt 
    678   1.87      yamt 			/* associate kva to mbuf */
    679   1.87      yamt 			MEXTADD(m, (void *)(lva + ((vaddr_t)off & PAGE_MASK)),
    680   1.87      yamt 			    cnt, M_MBUF, soloanfree, slp->ns_so);
    681   1.72      yamt 			m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP;
    682   1.72      yamt 			m->m_len = cnt;
    683   1.72      yamt 
    684   1.87      yamt 			/* map pages */
    685   1.87      yamt 			for (i = 0; i < npages; i++) {
    686   1.87      yamt 				pmap_kenter_pa(lva, VM_PAGE_TO_PHYS(pgpp[i]),
    687   1.87      yamt 				    VM_PROT_READ);
    688   1.87      yamt 				lva += PAGE_SIZE;
    689   1.87      yamt 			}
    690   1.87      yamt 
    691   1.72      yamt 			pmap_update(pmap_kernel());
    692   1.87      yamt 
    693   1.72      yamt 			mb->m_next = m;
    694   1.72      yamt 			mb = m;
    695   1.72      yamt 			error = 0;
    696   1.72      yamt 			uiop->uio_resid = 0;
    697   1.72      yamt 		} else {
    698   1.72      yamt 			struct iovec *iv;
    699   1.72      yamt 			struct iovec *iv2;
    700   1.72      yamt 			struct mbuf *m2;
    701   1.72      yamt 			int siz;
    702   1.72      yamt loan_fail:
    703   1.72      yamt 			/*
    704   1.72      yamt 			 * Generate the mbuf list with the uio_iov ref. to it.
    705   1.72      yamt 			 */
    706   1.72      yamt 			i = 0;
    707   1.72      yamt 			m = m2 = mb;
    708   1.72      yamt 			while (left > 0) {
    709   1.72      yamt 				siz = min(M_TRAILINGSPACE(m), left);
    710   1.72      yamt 				if (siz > 0) {
    711   1.72      yamt 					left -= siz;
    712   1.72      yamt 					i++;
    713   1.72      yamt 				}
    714   1.72      yamt 				if (left > 0) {
    715   1.72      yamt 					m = m_get(M_WAIT, MT_DATA);
    716   1.72      yamt 					MCLAIM(m, &nfs_mowner);
    717   1.72      yamt 					m_clget(m, M_WAIT);
    718   1.72      yamt 					m->m_len = 0;
    719   1.72      yamt 					m2->m_next = m;
    720   1.72      yamt 					m2 = m;
    721   1.72      yamt 				}
    722   1.72      yamt 			}
    723   1.72      yamt 			iv = malloc(i * sizeof(struct iovec), M_TEMP, M_WAITOK);
    724   1.72      yamt 			uiop->uio_iov = iv2 = iv;
    725   1.72      yamt 			m = mb;
    726   1.72      yamt 			left = cnt;
    727   1.72      yamt 			i = 0;
    728   1.72      yamt 			while (left > 0) {
    729   1.72      yamt 				if (m == NULL)
    730   1.72      yamt 					panic("nfsrv_read iov");
    731   1.72      yamt 				siz = min(M_TRAILINGSPACE(m), left);
    732   1.72      yamt 				if (siz > 0) {
    733  1.126  christos 					iv->iov_base = mtod(m, char *) +
    734   1.72      yamt 					    m->m_len;
    735   1.72      yamt 					iv->iov_len = siz;
    736   1.72      yamt 					m->m_len += siz;
    737   1.72      yamt 					left -= siz;
    738   1.72      yamt 					iv++;
    739   1.72      yamt 					i++;
    740   1.72      yamt 				}
    741   1.72      yamt 				m = m->m_next;
    742   1.23      fvdl 			}
    743   1.72      yamt 			uiop->uio_iovcnt = i;
    744   1.72      yamt 			uiop->uio_offset = off;
    745   1.72      yamt 			uiop->uio_resid = cnt;
    746   1.72      yamt 			uiop->uio_rw = UIO_READ;
    747  1.101      yamt 			UIO_SETUP_SYSSPACE(uiop);
    748   1.72      yamt 			error = VOP_READ(vp, uiop, IO_NODELOCKED, cred);
    749  1.126  christos 			free((void *)iv2, M_TEMP);
    750   1.23      fvdl 		}
    751   1.72      yamt read_error:
    752  1.131     pooka 		if (error || (getret = VOP_GETATTR(vp, &va, cred)) != 0){
    753   1.23      fvdl 			if (!error)
    754   1.23      fvdl 				error = getret;
    755   1.15   mycroft 			m_freem(mreq);
    756   1.15   mycroft 			vput(vp);
    757   1.23      fvdl 			nfsm_reply(NFSX_POSTOPATTR(v3));
    758   1.23      fvdl 			nfsm_srvpostop_attr(getret, &va);
    759   1.23      fvdl 			return (0);
    760   1.15   mycroft 		}
    761   1.72      yamt 	} else {
    762   1.15   mycroft 		uiop->uio_resid = 0;
    763   1.72      yamt 	}
    764    1.1       cgd 	vput(vp);
    765   1.23      fvdl 	nfsm_srvfillattr(&va, fp);
    766    1.1       cgd 	len -= uiop->uio_resid;
    767   1.76      yamt 	padlen = nfsm_padlen(len);
    768   1.76      yamt 	if (uiop->uio_resid || padlen)
    769   1.76      yamt 		nfs_zeropad(mb, uiop->uio_resid, padlen);
    770   1.23      fvdl 	if (v3) {
    771   1.83      yamt 		/* count */
    772   1.23      fvdl 		*tl++ = txdr_unsigned(len);
    773   1.83      yamt 		/* eof */
    774   1.83      yamt 		if (off + len >= va.va_size)
    775   1.23      fvdl 			*tl++ = nfs_true;
    776   1.23      fvdl 		else
    777   1.23      fvdl 			*tl++ = nfs_false;
    778   1.23      fvdl 	}
    779    1.1       cgd 	*tl = txdr_unsigned(len);
    780    1.1       cgd 	nfsm_srvdone;
    781    1.1       cgd }
    782    1.1       cgd 
    783    1.1       cgd /*
    784    1.1       cgd  * nfs write service
    785    1.1       cgd  */
    786   1.22  christos int
    787   1.99  christos nfsrv_write(nfsd, slp, lwp, mrq)
    788   1.23      fvdl 	struct nfsrv_descript *nfsd;
    789   1.23      fvdl 	struct nfssvc_sock *slp;
    790   1.99  christos 	struct lwp *lwp;
    791   1.23      fvdl 	struct mbuf **mrq;
    792    1.1       cgd {
    793   1.23      fvdl 	struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
    794   1.23      fvdl 	struct mbuf *nam = nfsd->nd_nam;
    795  1.126  christos 	char *dpos = nfsd->nd_dpos;
    796  1.109      elad 	kauth_cred_t cred = nfsd->nd_cr;
    797   1.54  augustss 	struct iovec *ivp;
    798   1.54  augustss 	int i, cnt;
    799   1.54  augustss 	struct mbuf *mp;
    800   1.54  augustss 	struct nfs_fattr *fp;
    801   1.23      fvdl 	struct iovec *iv;
    802   1.23      fvdl 	struct vattr va, forat;
    803   1.54  augustss 	u_int32_t *tl;
    804   1.54  augustss 	int32_t t1;
    805  1.126  christos 	char *bpos;
    806  1.103  christos 	int error = 0, rdonly, cache = 0, len, forat_ret = 1;
    807   1.23      fvdl 	int ioflags, aftat_ret = 1, retlen, zeroing, adjust;
    808   1.23      fvdl 	int stable = NFSV3WRITE_FILESYNC;
    809   1.23      fvdl 	int v3 = (nfsd->nd_flag & ND_NFSV3);
    810    1.1       cgd 	char *cp2;
    811   1.67      matt 	struct mbuf *mb, *mreq;
    812    1.1       cgd 	struct vnode *vp;
    813  1.117      yamt 	nfsrvfh_t nsfh;
    814    1.1       cgd 	struct uio io, *uiop = &io;
    815    1.1       cgd 	off_t off;
    816   1.15   mycroft 	u_quad_t frev;
    817    1.1       cgd 
    818   1.23      fvdl 	if (mrep == NULL) {
    819   1.23      fvdl 		*mrq = NULL;
    820   1.23      fvdl 		return (0);
    821   1.23      fvdl 	}
    822  1.117      yamt 	nfsm_srvmtofh(&nsfh);
    823   1.23      fvdl 	if (v3) {
    824   1.23      fvdl 		nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
    825   1.48      fair 		off = fxdr_hyper(tl);
    826   1.23      fvdl 		tl += 3;
    827   1.23      fvdl 		stable = fxdr_unsigned(int, *tl++);
    828   1.23      fvdl 	} else {
    829   1.23      fvdl 		nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
    830   1.19       cgd 		off = (off_t)fxdr_unsigned(u_int32_t, *++tl);
    831   1.15   mycroft 		tl += 2;
    832   1.15   mycroft 	}
    833   1.23      fvdl 	retlen = len = fxdr_unsigned(int32_t, *tl);
    834   1.23      fvdl 	cnt = i = 0;
    835   1.23      fvdl 
    836   1.23      fvdl 	/*
    837   1.23      fvdl 	 * For NFS Version 2, it is not obvious what a write of zero length
    838   1.23      fvdl 	 * should do, but I might as well be consistent with Version 3,
    839   1.23      fvdl 	 * which is to return ok so long as there are no permission problems.
    840   1.23      fvdl 	 */
    841   1.23      fvdl 	if (len > 0) {
    842   1.74      yamt 		zeroing = 1;
    843   1.74      yamt 		mp = mrep;
    844   1.74      yamt 		while (mp) {
    845   1.74      yamt 			if (mp == md) {
    846   1.74      yamt 				zeroing = 0;
    847  1.126  christos 				adjust = dpos - mtod(mp, char *);
    848   1.74      yamt 				mp->m_len -= adjust;
    849   1.74      yamt 				if (mp->m_len > 0 && adjust > 0)
    850   1.74      yamt 					NFSMADV(mp, adjust);
    851   1.23      fvdl 			}
    852   1.74      yamt 			if (zeroing)
    853   1.74      yamt 				mp->m_len = 0;
    854   1.74      yamt 			else if (mp->m_len > 0) {
    855   1.74      yamt 				i += mp->m_len;
    856   1.74      yamt 				if (i > len) {
    857   1.74      yamt 					mp->m_len -= (i - len);
    858   1.74      yamt 					zeroing	= 1;
    859   1.74      yamt 				}
    860   1.74      yamt 				if (mp->m_len > 0)
    861   1.74      yamt 					cnt++;
    862   1.74      yamt 			}
    863   1.74      yamt 			mp = mp->m_next;
    864   1.23      fvdl 		}
    865   1.23      fvdl 	}
    866   1.23      fvdl 	if (len > NFS_MAXDATA || len < 0 || i < len) {
    867   1.23      fvdl 		error = EIO;
    868   1.23      fvdl 		nfsm_reply(2 * NFSX_UNSIGNED);
    869   1.23      fvdl 		nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va);
    870   1.23      fvdl 		return (0);
    871    1.1       cgd 	}
    872  1.117      yamt 	error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam,
    873  1.125   thorpej 		 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false);
    874   1.23      fvdl 	if (error) {
    875   1.23      fvdl 		nfsm_reply(2 * NFSX_UNSIGNED);
    876   1.23      fvdl 		nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va);
    877   1.23      fvdl 		return (0);
    878    1.1       cgd 	}
    879   1.23      fvdl 	if (v3)
    880  1.131     pooka 		forat_ret = VOP_GETATTR(vp, &forat, cred);
    881   1.15   mycroft 	if (vp->v_type != VREG) {
    882   1.23      fvdl 		if (v3)
    883   1.23      fvdl 			error = EINVAL;
    884   1.23      fvdl 		else
    885   1.23      fvdl 			error = (vp->v_type == VDIR) ? EISDIR : EACCES;
    886   1.23      fvdl 	}
    887   1.23      fvdl 	if (!error) {
    888   1.23      fvdl 		nqsrv_getl(vp, ND_WRITE);
    889   1.99  christos 		error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1);
    890   1.15   mycroft 	}
    891   1.22  christos 	if (error) {
    892    1.1       cgd 		vput(vp);
    893   1.23      fvdl 		nfsm_reply(NFSX_WCCDATA(v3));
    894   1.23      fvdl 		nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va);
    895   1.23      fvdl 		return (0);
    896   1.23      fvdl 	}
    897   1.23      fvdl 
    898   1.23      fvdl 	if (len > 0) {
    899   1.74      yamt 		ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, M_WAITOK);
    900   1.74      yamt 		uiop->uio_iov = iv = ivp;
    901   1.74      yamt 		uiop->uio_iovcnt = cnt;
    902   1.74      yamt 		mp = mrep;
    903   1.74      yamt 		while (mp) {
    904   1.74      yamt 			if (mp->m_len > 0) {
    905  1.126  christos 				ivp->iov_base = mtod(mp, void *);
    906   1.74      yamt 				ivp->iov_len = mp->m_len;
    907   1.74      yamt 				ivp++;
    908   1.74      yamt 			}
    909   1.74      yamt 			mp = mp->m_next;
    910   1.74      yamt 		}
    911   1.74      yamt 
    912   1.74      yamt 		/*
    913   1.74      yamt 		 * XXX
    914   1.74      yamt 		 * The IO_METASYNC flag indicates that all metadata (and not
    915   1.74      yamt 		 * just enough to ensure data integrity) must be written to
    916   1.74      yamt 		 * stable storage synchronously.
    917   1.74      yamt 		 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.)
    918   1.74      yamt 		 */
    919   1.74      yamt 		if (stable == NFSV3WRITE_UNSTABLE)
    920   1.74      yamt 			ioflags = IO_NODELOCKED;
    921   1.74      yamt 		else if (stable == NFSV3WRITE_DATASYNC)
    922   1.74      yamt 			ioflags = (IO_SYNC | IO_NODELOCKED);
    923   1.74      yamt 		else
    924   1.74      yamt 			ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED);
    925   1.74      yamt 		uiop->uio_resid = len;
    926   1.74      yamt 		uiop->uio_rw = UIO_WRITE;
    927   1.74      yamt 		uiop->uio_offset = off;
    928  1.101      yamt 		UIO_SETUP_SYSSPACE(uiop);
    929   1.74      yamt 		error = VOP_WRITE(vp, uiop, ioflags, cred);
    930   1.74      yamt 		nfsstats.srvvop_writes++;
    931   1.74      yamt 		free(iv, M_TEMP);
    932   1.23      fvdl 	}
    933  1.131     pooka 	aftat_ret = VOP_GETATTR(vp, &va, cred);
    934   1.23      fvdl 	vput(vp);
    935   1.23      fvdl 	if (!error)
    936   1.23      fvdl 		error = aftat_ret;
    937   1.23      fvdl 	nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) +
    938   1.23      fvdl 		2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3));
    939   1.23      fvdl 	if (v3) {
    940   1.23      fvdl 		nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va);
    941   1.23      fvdl 		if (error)
    942   1.23      fvdl 			return (0);
    943   1.23      fvdl 		nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
    944   1.23      fvdl 		*tl++ = txdr_unsigned(retlen);
    945   1.23      fvdl 		if (stable == NFSV3WRITE_UNSTABLE)
    946   1.23      fvdl 			*tl++ = txdr_unsigned(stable);
    947   1.23      fvdl 		else
    948   1.23      fvdl 			*tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC);
    949   1.23      fvdl 		/*
    950   1.23      fvdl 		 * Actually, there is no need to txdr these fields,
    951   1.23      fvdl 		 * but it may make the values more human readable,
    952   1.23      fvdl 		 * for debugging purposes.
    953   1.23      fvdl 		 */
    954   1.23      fvdl 		*tl++ = txdr_unsigned(boottime.tv_sec);
    955   1.23      fvdl 		*tl = txdr_unsigned(boottime.tv_usec);
    956   1.23      fvdl 	} else {
    957   1.23      fvdl 		nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR);
    958   1.23      fvdl 		nfsm_srvfillattr(&va, fp);
    959   1.23      fvdl 	}
    960   1.23      fvdl 	nfsm_srvdone;
    961   1.23      fvdl }
    962   1.23      fvdl 
    963   1.23      fvdl /*
    964  1.109      elad  * XXX elad: the original NFSW_SAMECRED() macro also made sure the
    965  1.109      elad  *	     two nd_flag fields of the descriptors contained
    966  1.109      elad  *	     ND_KERBAUTH.
    967  1.109      elad  */
    968  1.109      elad static int
    969  1.109      elad nfsrv_samecred(kauth_cred_t cred1, kauth_cred_t cred2)
    970  1.109      elad {
    971  1.109      elad 	int i, do_ngroups;
    972  1.109      elad 
    973  1.109      elad 	if (kauth_cred_geteuid(cred1) != kauth_cred_geteuid(cred2))
    974  1.109      elad 		return (0);
    975  1.109      elad 	if (kauth_cred_ngroups(cred1) != kauth_cred_ngroups(cred2))
    976  1.109      elad 		return (0);
    977  1.109      elad 	do_ngroups = kauth_cred_ngroups(cred1);
    978  1.109      elad 	for (i = 0; i < do_ngroups; i++)
    979  1.109      elad 		if (kauth_cred_group(cred1, i) !=
    980  1.109      elad 		    kauth_cred_group(cred2, i))
    981  1.109      elad 			return (0);
    982  1.109      elad 
    983  1.109      elad 	return (1);
    984  1.109      elad }
    985  1.109      elad 
    986  1.117      yamt static struct nfsrvw_delayhash *
    987  1.117      yamt nfsrv_nwdelayhash(struct nfssvc_sock *slp, const nfsrvfh_t *nsfh)
    988  1.117      yamt {
    989  1.117      yamt 	uint32_t hash;
    990  1.117      yamt 
    991  1.117      yamt 	hash = hash32_buf(NFSRVFH_DATA(nsfh), NFSRVFH_SIZE(nsfh),
    992  1.117      yamt 	    HASH32_BUF_INIT);
    993  1.117      yamt 	return &slp->ns_wdelayhashtbl[hash % NFS_WDELAYHASHSIZ];
    994  1.117      yamt }
    995  1.117      yamt 
    996  1.109      elad /*
    997   1.23      fvdl  * NFS write service with write gathering support. Called when
    998   1.23      fvdl  * nfsrvw_procrastinate > 0.
    999   1.23      fvdl  * See: Chet Juszczak, "Improving the Write Performance of an NFS Server",
   1000   1.23      fvdl  * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco,
   1001   1.23      fvdl  * Jan. 1994.
   1002   1.23      fvdl  */
   1003   1.23      fvdl int
   1004   1.99  christos nfsrv_writegather(ndp, slp, lwp, mrq)
   1005   1.23      fvdl 	struct nfsrv_descript **ndp;
   1006   1.23      fvdl 	struct nfssvc_sock *slp;
   1007   1.99  christos 	struct lwp *lwp;
   1008   1.23      fvdl 	struct mbuf **mrq;
   1009   1.23      fvdl {
   1010  1.110    kardel 	struct timeval now;
   1011   1.54  augustss 	struct iovec *ivp;
   1012   1.54  augustss 	struct mbuf *mp;
   1013   1.54  augustss 	struct nfsrv_descript *wp, *nfsd, *owp, *swp;
   1014   1.54  augustss 	struct nfs_fattr *fp;
   1015   1.54  augustss 	int i = 0;
   1016   1.23      fvdl 	struct iovec *iov;
   1017   1.23      fvdl 	struct nfsrvw_delayhash *wpp;
   1018  1.109      elad 	kauth_cred_t cred;
   1019   1.23      fvdl 	struct vattr va, forat;
   1020   1.54  augustss 	u_int32_t *tl;
   1021   1.54  augustss 	int32_t t1;
   1022  1.126  christos 	char *bpos, *dpos;
   1023  1.103  christos 	int error = 0, rdonly, cache = 0, len = 0, forat_ret = 1;
   1024  1.132      yamt 	int ioflags, aftat_ret = 1, adjust, v3, zeroing;
   1025   1.23      fvdl 	char *cp2;
   1026   1.67      matt 	struct mbuf *mb, *mreq, *mrep, *md;
   1027   1.23      fvdl 	struct vnode *vp;
   1028   1.23      fvdl 	struct uio io, *uiop = &io;
   1029   1.23      fvdl 	u_quad_t frev, cur_usec;
   1030   1.23      fvdl 
   1031   1.23      fvdl 	*mrq = NULL;
   1032   1.23      fvdl 	if (*ndp) {
   1033   1.23      fvdl 	    nfsd = *ndp;
   1034   1.23      fvdl 	    *ndp = NULL;
   1035   1.23      fvdl 	    mrep = nfsd->nd_mrep;
   1036   1.23      fvdl 	    md = nfsd->nd_md;
   1037   1.23      fvdl 	    dpos = nfsd->nd_dpos;
   1038  1.109      elad 	    cred = nfsd->nd_cr;
   1039   1.23      fvdl 	    v3 = (nfsd->nd_flag & ND_NFSV3);
   1040   1.23      fvdl 	    LIST_INIT(&nfsd->nd_coalesce);
   1041   1.23      fvdl 	    nfsd->nd_mreq = NULL;
   1042   1.23      fvdl 	    nfsd->nd_stable = NFSV3WRITE_FILESYNC;
   1043  1.110    kardel 	    getmicrotime(&now);
   1044  1.110    kardel 	    cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec;
   1045   1.23      fvdl 	    nfsd->nd_time = cur_usec + nfsrvw_procrastinate;
   1046   1.94     perry 
   1047   1.23      fvdl 	    /*
   1048   1.23      fvdl 	     * Now, get the write header..
   1049   1.23      fvdl 	     */
   1050   1.23      fvdl 	    nfsm_srvmtofh(&nfsd->nd_fh);
   1051   1.23      fvdl 	    if (v3) {
   1052   1.23      fvdl 		nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
   1053   1.48      fair 		nfsd->nd_off = fxdr_hyper(tl);
   1054   1.23      fvdl 		tl += 3;
   1055   1.23      fvdl 		nfsd->nd_stable = fxdr_unsigned(int, *tl++);
   1056   1.23      fvdl 	    } else {
   1057   1.23      fvdl 		nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
   1058   1.23      fvdl 		nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl);
   1059   1.23      fvdl 		tl += 2;
   1060   1.23      fvdl 	    }
   1061   1.23      fvdl 	    len = fxdr_unsigned(int32_t, *tl);
   1062   1.23      fvdl 	    nfsd->nd_len = len;
   1063   1.23      fvdl 	    nfsd->nd_eoff = nfsd->nd_off + len;
   1064   1.94     perry 
   1065   1.23      fvdl 	    /*
   1066   1.23      fvdl 	     * Trim the header out of the mbuf list and trim off any trailing
   1067   1.23      fvdl 	     * junk so that the mbuf list has only the write data.
   1068   1.23      fvdl 	     */
   1069   1.23      fvdl 	    zeroing = 1;
   1070   1.23      fvdl 	    i = 0;
   1071   1.23      fvdl 	    mp = mrep;
   1072   1.23      fvdl 	    while (mp) {
   1073   1.23      fvdl 		if (mp == md) {
   1074   1.23      fvdl 		    zeroing = 0;
   1075  1.126  christos 		    adjust = dpos - mtod(mp, char *);
   1076   1.23      fvdl 		    mp->m_len -= adjust;
   1077   1.23      fvdl 		    if (mp->m_len > 0 && adjust > 0)
   1078   1.23      fvdl 			NFSMADV(mp, adjust);
   1079   1.23      fvdl 		}
   1080   1.23      fvdl 		if (zeroing)
   1081   1.23      fvdl 		    mp->m_len = 0;
   1082   1.23      fvdl 		else {
   1083   1.23      fvdl 		    i += mp->m_len;
   1084   1.23      fvdl 		    if (i > len) {
   1085   1.23      fvdl 			mp->m_len -= (i - len);
   1086   1.23      fvdl 			zeroing = 1;
   1087   1.23      fvdl 		    }
   1088   1.23      fvdl 		}
   1089   1.23      fvdl 		mp = mp->m_next;
   1090   1.23      fvdl 	    }
   1091   1.23      fvdl 	    if (len > NFS_MAXDATA || len < 0  || i < len) {
   1092   1.23      fvdl nfsmout:
   1093   1.23      fvdl 		m_freem(mrep);
   1094   1.23      fvdl 		error = EIO;
   1095   1.23      fvdl 		nfsm_writereply(2 * NFSX_UNSIGNED, v3);
   1096   1.23      fvdl 		if (v3)
   1097   1.23      fvdl 		    nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va);
   1098   1.23      fvdl 		nfsd->nd_mreq = mreq;
   1099   1.23      fvdl 		nfsd->nd_mrep = NULL;
   1100   1.23      fvdl 		nfsd->nd_time = 0;
   1101   1.23      fvdl 	    }
   1102   1.94     perry 
   1103   1.23      fvdl 	    /*
   1104   1.23      fvdl 	     * Add this entry to the hash and time queues.
   1105   1.23      fvdl 	     */
   1106   1.23      fvdl 	    owp = NULL;
   1107  1.132      yamt 	    mutex_enter(&nfsd_lock);
   1108   1.70      yamt 	    wp = LIST_FIRST(&slp->ns_tq);
   1109   1.23      fvdl 	    while (wp && wp->nd_time < nfsd->nd_time) {
   1110   1.23      fvdl 		owp = wp;
   1111   1.70      yamt 		wp = LIST_NEXT(wp, nd_tq);
   1112   1.23      fvdl 	    }
   1113   1.23      fvdl 	    if (owp) {
   1114   1.23      fvdl 		LIST_INSERT_AFTER(owp, nfsd, nd_tq);
   1115   1.23      fvdl 	    } else {
   1116   1.23      fvdl 		LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq);
   1117   1.23      fvdl 	    }
   1118   1.23      fvdl 	    if (nfsd->nd_mrep) {
   1119  1.117      yamt 		wpp = nfsrv_nwdelayhash(slp, &nfsd->nd_fh);
   1120   1.23      fvdl 		owp = NULL;
   1121   1.70      yamt 		wp = LIST_FIRST(wpp);
   1122  1.117      yamt 		while (wp && nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) {
   1123   1.23      fvdl 		    owp = wp;
   1124   1.70      yamt 		    wp = LIST_NEXT(wp, nd_hash);
   1125   1.23      fvdl 		}
   1126   1.23      fvdl 		while (wp && wp->nd_off < nfsd->nd_off &&
   1127  1.117      yamt 		    !nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) {
   1128   1.23      fvdl 		    owp = wp;
   1129   1.70      yamt 		    wp = LIST_NEXT(wp, nd_hash);
   1130   1.23      fvdl 		}
   1131   1.23      fvdl 		if (owp) {
   1132   1.23      fvdl 		    LIST_INSERT_AFTER(owp, nfsd, nd_hash);
   1133   1.23      fvdl 
   1134   1.23      fvdl 		    /*
   1135   1.23      fvdl 		     * Search the hash list for overlapping entries and
   1136   1.23      fvdl 		     * coalesce.
   1137   1.23      fvdl 		     */
   1138   1.23      fvdl 		    for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) {
   1139   1.70      yamt 			wp = LIST_NEXT(nfsd, nd_hash);
   1140  1.109      elad 			if (nfsrv_samecred(owp->nd_cr, nfsd->nd_cr))
   1141   1.23      fvdl 			    nfsrvw_coalesce(owp, nfsd);
   1142   1.23      fvdl 		    }
   1143   1.23      fvdl 		} else {
   1144   1.23      fvdl 		    LIST_INSERT_HEAD(wpp, nfsd, nd_hash);
   1145   1.23      fvdl 		}
   1146   1.23      fvdl 	    }
   1147  1.132      yamt 	    mutex_exit(&nfsd_lock);
   1148    1.1       cgd 	}
   1149   1.94     perry 
   1150    1.1       cgd 	/*
   1151   1.23      fvdl 	 * Now, do VOP_WRITE()s for any one(s) that need to be done now
   1152   1.23      fvdl 	 * and generate the associated reply mbuf list(s).
   1153    1.1       cgd 	 */
   1154   1.23      fvdl loop1:
   1155  1.110    kardel 	getmicrotime(&now);
   1156  1.110    kardel 	cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec;
   1157  1.132      yamt 	mutex_enter(&nfsd_lock);
   1158   1.70      yamt 	for (nfsd = LIST_FIRST(&slp->ns_tq); nfsd; nfsd = owp) {
   1159   1.70      yamt 		owp = LIST_NEXT(nfsd, nd_tq);
   1160   1.23      fvdl 		if (nfsd->nd_time > cur_usec)
   1161   1.23      fvdl 		    break;
   1162   1.23      fvdl 		if (nfsd->nd_mreq)
   1163   1.23      fvdl 		    continue;
   1164   1.23      fvdl 		LIST_REMOVE(nfsd, nd_tq);
   1165   1.23      fvdl 		LIST_REMOVE(nfsd, nd_hash);
   1166  1.132      yamt 		mutex_exit(&nfsd_lock);
   1167  1.132      yamt 
   1168   1.23      fvdl 		mrep = nfsd->nd_mrep;
   1169   1.23      fvdl 		nfsd->nd_mrep = NULL;
   1170  1.109      elad 		cred = nfsd->nd_cr;
   1171   1.23      fvdl 		v3 = (nfsd->nd_flag & ND_NFSV3);
   1172   1.23      fvdl 		forat_ret = aftat_ret = 1;
   1173  1.117      yamt 		error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp,
   1174   1.35      fvdl 		    nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH),
   1175  1.125   thorpej 		    false);
   1176   1.23      fvdl 		if (!error) {
   1177   1.23      fvdl 		    if (v3)
   1178  1.131     pooka 			forat_ret = VOP_GETATTR(vp, &forat, cred);
   1179   1.23      fvdl 		    if (vp->v_type != VREG) {
   1180   1.23      fvdl 			if (v3)
   1181   1.23      fvdl 			    error = EINVAL;
   1182    1.1       cgd 			else
   1183   1.23      fvdl 			    error = (vp->v_type == VDIR) ? EISDIR : EACCES;
   1184   1.23      fvdl 		    }
   1185   1.23      fvdl 		} else
   1186   1.23      fvdl 		    vp = NULL;
   1187   1.23      fvdl 		if (!error) {
   1188   1.23      fvdl 		    nqsrv_getl(vp, ND_WRITE);
   1189   1.99  christos 		    error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1);
   1190   1.23      fvdl 		}
   1191   1.94     perry 
   1192   1.23      fvdl 		if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE)
   1193   1.23      fvdl 		    ioflags = IO_NODELOCKED;
   1194   1.23      fvdl 		else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC)
   1195   1.23      fvdl 		    ioflags = (IO_SYNC | IO_NODELOCKED);
   1196   1.23      fvdl 		else
   1197   1.23      fvdl 		    ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED);
   1198   1.23      fvdl 		uiop->uio_rw = UIO_WRITE;
   1199   1.23      fvdl 		uiop->uio_offset = nfsd->nd_off;
   1200   1.23      fvdl 		uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off;
   1201  1.101      yamt 		UIO_SETUP_SYSSPACE(uiop);
   1202   1.23      fvdl 		if (uiop->uio_resid > 0) {
   1203   1.23      fvdl 		    mp = mrep;
   1204   1.23      fvdl 		    i = 0;
   1205   1.23      fvdl 		    while (mp) {
   1206   1.23      fvdl 			if (mp->m_len > 0)
   1207   1.23      fvdl 			    i++;
   1208   1.23      fvdl 			mp = mp->m_next;
   1209   1.23      fvdl 		    }
   1210   1.23      fvdl 		    uiop->uio_iovcnt = i;
   1211   1.56   thorpej 		    iov = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK);
   1212   1.23      fvdl 		    uiop->uio_iov = ivp = iov;
   1213   1.23      fvdl 		    mp = mrep;
   1214   1.23      fvdl 		    while (mp) {
   1215   1.23      fvdl 			if (mp->m_len > 0) {
   1216  1.126  christos 			    ivp->iov_base = mtod(mp, void *);
   1217   1.23      fvdl 			    ivp->iov_len = mp->m_len;
   1218   1.23      fvdl 			    ivp++;
   1219   1.23      fvdl 			}
   1220    1.1       cgd 			mp = mp->m_next;
   1221   1.23      fvdl 		    }
   1222   1.23      fvdl 		    if (!error) {
   1223  1.128   hannken 			error = VOP_WRITE(vp, uiop, ioflags, cred);
   1224  1.128   hannken 			nfsstats.srvvop_writes++;
   1225   1.23      fvdl 		    }
   1226  1.126  christos 		    free((void *)iov, M_TEMP);
   1227    1.1       cgd 		}
   1228   1.23      fvdl 		m_freem(mrep);
   1229   1.23      fvdl 		if (vp) {
   1230  1.131     pooka 		    aftat_ret = VOP_GETATTR(vp, &va, cred);
   1231   1.23      fvdl 		    vput(vp);
   1232    1.1       cgd 		}
   1233   1.23      fvdl 
   1234   1.23      fvdl 		/*
   1235   1.23      fvdl 		 * Loop around generating replies for all write rpcs that have
   1236   1.23      fvdl 		 * now been completed.
   1237   1.23      fvdl 		 */
   1238   1.23      fvdl 		swp = nfsd;
   1239   1.23      fvdl 		do {
   1240   1.23      fvdl 		    if (error) {
   1241   1.23      fvdl 			nfsm_writereply(NFSX_WCCDATA(v3), v3);
   1242   1.23      fvdl 			if (v3) {
   1243   1.23      fvdl 			    nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va);
   1244   1.23      fvdl 			}
   1245   1.23      fvdl 		    } else {
   1246   1.23      fvdl 			nfsm_writereply(NFSX_PREOPATTR(v3) +
   1247   1.23      fvdl 			    NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED +
   1248   1.23      fvdl 			    NFSX_WRITEVERF(v3), v3);
   1249   1.23      fvdl 			if (v3) {
   1250   1.23      fvdl 			    nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va);
   1251   1.23      fvdl 			    nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
   1252   1.23      fvdl 			    *tl++ = txdr_unsigned(nfsd->nd_len);
   1253   1.23      fvdl 			    *tl++ = txdr_unsigned(swp->nd_stable);
   1254   1.23      fvdl 			    /*
   1255   1.23      fvdl 			     * Actually, there is no need to txdr these fields,
   1256   1.23      fvdl 			     * but it may make the values more human readable,
   1257   1.23      fvdl 			     * for debugging purposes.
   1258   1.23      fvdl 			     */
   1259   1.23      fvdl 			    *tl++ = txdr_unsigned(boottime.tv_sec);
   1260   1.23      fvdl 			    *tl = txdr_unsigned(boottime.tv_usec);
   1261   1.23      fvdl 			} else {
   1262   1.23      fvdl 			    nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR);
   1263   1.23      fvdl 			    nfsm_srvfillattr(&va, fp);
   1264   1.23      fvdl 			}
   1265   1.23      fvdl 		    }
   1266   1.23      fvdl 		    nfsd->nd_mreq = mreq;
   1267   1.23      fvdl 		    if (nfsd->nd_mrep)
   1268   1.23      fvdl 			panic("nfsrv_write: nd_mrep not free");
   1269   1.23      fvdl 
   1270   1.23      fvdl 		    /*
   1271   1.23      fvdl 		     * Done. Put it at the head of the timer queue so that
   1272   1.23      fvdl 		     * the final phase can return the reply.
   1273   1.23      fvdl 		     */
   1274  1.132      yamt 		    mutex_enter(&nfsd_lock);
   1275   1.23      fvdl 		    if (nfsd != swp) {
   1276   1.23      fvdl 			nfsd->nd_time = 0;
   1277   1.23      fvdl 			LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq);
   1278   1.23      fvdl 		    }
   1279   1.70      yamt 		    nfsd = LIST_FIRST(&swp->nd_coalesce);
   1280   1.23      fvdl 		    if (nfsd) {
   1281   1.23      fvdl 			LIST_REMOVE(nfsd, nd_tq);
   1282   1.23      fvdl 		    }
   1283  1.132      yamt 		    mutex_exit(&nfsd_lock);
   1284   1.23      fvdl 		} while (nfsd);
   1285   1.23      fvdl 		swp->nd_time = 0;
   1286  1.132      yamt 
   1287  1.132      yamt 		mutex_enter(&nfsd_lock);
   1288   1.23      fvdl 		LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq);
   1289  1.132      yamt 		mutex_exit(&nfsd_lock);
   1290   1.23      fvdl 		goto loop1;
   1291   1.23      fvdl 	}
   1292  1.132      yamt 	mutex_exit(&nfsd_lock);
   1293  1.129      yamt 	nfs_timer_start();
   1294   1.23      fvdl 
   1295   1.23      fvdl 	/*
   1296   1.23      fvdl 	 * Search for a reply to return.
   1297   1.23      fvdl 	 */
   1298  1.132      yamt 	mutex_enter(&nfsd_lock);
   1299   1.70      yamt 	LIST_FOREACH(nfsd, &slp->ns_tq, nd_tq) {
   1300   1.23      fvdl 		if (nfsd->nd_mreq) {
   1301   1.23      fvdl 		    LIST_REMOVE(nfsd, nd_tq);
   1302   1.23      fvdl 		    *mrq = nfsd->nd_mreq;
   1303   1.23      fvdl 		    *ndp = nfsd;
   1304   1.23      fvdl 		    break;
   1305    1.1       cgd 		}
   1306   1.70      yamt 	}
   1307  1.132      yamt 	mutex_exit(&nfsd_lock);
   1308   1.23      fvdl 	return (0);
   1309   1.23      fvdl }
   1310   1.23      fvdl 
   1311   1.23      fvdl /*
   1312   1.23      fvdl  * Coalesce the write request nfsd into owp. To do this we must:
   1313   1.23      fvdl  * - remove nfsd from the queues
   1314   1.23      fvdl  * - merge nfsd->nd_mrep into owp->nd_mrep
   1315   1.23      fvdl  * - update the nd_eoff and nd_stable for owp
   1316   1.23      fvdl  * - put nfsd on owp's nd_coalesce list
   1317   1.23      fvdl  * NB: Must be called at splsoftclock().
   1318   1.23      fvdl  */
   1319   1.23      fvdl void
   1320   1.23      fvdl nfsrvw_coalesce(owp, nfsd)
   1321   1.54  augustss         struct nfsrv_descript *owp;
   1322   1.54  augustss         struct nfsrv_descript *nfsd;
   1323   1.23      fvdl {
   1324   1.54  augustss         int overlap;
   1325   1.54  augustss         struct mbuf *mp;
   1326   1.70      yamt 	struct nfsrv_descript *m;
   1327   1.23      fvdl 
   1328  1.132      yamt 	KASSERT(mutex_owned(&nfsd_lock));
   1329  1.132      yamt 
   1330   1.23      fvdl         LIST_REMOVE(nfsd, nd_hash);
   1331   1.23      fvdl         LIST_REMOVE(nfsd, nd_tq);
   1332   1.23      fvdl         if (owp->nd_eoff < nfsd->nd_eoff) {
   1333   1.23      fvdl             overlap = owp->nd_eoff - nfsd->nd_off;
   1334   1.23      fvdl             if (overlap < 0)
   1335   1.23      fvdl                 panic("nfsrv_coalesce: bad off");
   1336   1.23      fvdl             if (overlap > 0)
   1337   1.23      fvdl                 m_adj(nfsd->nd_mrep, overlap);
   1338   1.23      fvdl             mp = owp->nd_mrep;
   1339   1.23      fvdl             while (mp->m_next)
   1340   1.23      fvdl                 mp = mp->m_next;
   1341   1.23      fvdl             mp->m_next = nfsd->nd_mrep;
   1342   1.23      fvdl             owp->nd_eoff = nfsd->nd_eoff;
   1343   1.23      fvdl         } else
   1344   1.23      fvdl             m_freem(nfsd->nd_mrep);
   1345   1.23      fvdl         nfsd->nd_mrep = NULL;
   1346   1.23      fvdl         if (nfsd->nd_stable == NFSV3WRITE_FILESYNC)
   1347   1.23      fvdl             owp->nd_stable = NFSV3WRITE_FILESYNC;
   1348   1.23      fvdl         else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC &&
   1349   1.23      fvdl             owp->nd_stable == NFSV3WRITE_UNSTABLE)
   1350   1.23      fvdl             owp->nd_stable = NFSV3WRITE_DATASYNC;
   1351   1.23      fvdl         LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq);
   1352   1.34      fvdl  	/*
   1353   1.34      fvdl  	 * nfsd might hold coalesce elements! Move them to owp.
   1354   1.34      fvdl  	 * Otherwise, requests may be lost and clients will be stuck.
   1355   1.34      fvdl  	 */
   1356   1.70      yamt 	while ((m = LIST_FIRST(&nfsd->nd_coalesce)) != NULL) {
   1357   1.70      yamt 		LIST_REMOVE(m, nd_tq);
   1358   1.70      yamt 		LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq);
   1359   1.70      yamt 	}
   1360    1.1       cgd }
   1361    1.1       cgd 
   1362    1.1       cgd /*
   1363    1.1       cgd  * nfs create service
   1364   1.15   mycroft  * now does a truncate to 0 length via. setattr if it already exists
   1365    1.1       cgd  */
   1366   1.22  christos int
   1367   1.99  christos nfsrv_create(nfsd, slp, lwp, mrq)
   1368   1.23      fvdl 	struct nfsrv_descript *nfsd;
   1369   1.23      fvdl 	struct nfssvc_sock *slp;
   1370   1.99  christos 	struct lwp *lwp;
   1371   1.23      fvdl 	struct mbuf **mrq;
   1372    1.1       cgd {
   1373   1.23      fvdl 	struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
   1374   1.23      fvdl 	struct mbuf *nam = nfsd->nd_nam;
   1375  1.126  christos 	char *dpos = nfsd->nd_dpos;
   1376  1.109      elad 	kauth_cred_t cred = nfsd->nd_cr;
   1377   1.54  augustss 	struct nfs_fattr *fp;
   1378   1.23      fvdl 	struct vattr va, dirfor, diraft;
   1379   1.54  augustss 	struct nfsv2_sattr *sp;
   1380   1.54  augustss 	u_int32_t *tl;
   1381    1.1       cgd 	struct nameidata nd;
   1382  1.126  christos 	char *cp;
   1383   1.54  augustss 	int32_t t1;
   1384  1.126  christos 	char *bpos;
   1385  1.103  christos 	int error = 0, cache = 0, len, tsize, dirfor_ret = 1, diraft_ret = 1;
   1386   1.23      fvdl 	int rdev = 0;
   1387   1.23      fvdl 	int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0;
   1388    1.1       cgd 	char *cp2;
   1389   1.67      matt 	struct mbuf *mb, *mreq;
   1390   1.23      fvdl 	struct vnode *vp = NULL, *dirp = NULL;
   1391  1.117      yamt 	nfsrvfh_t nsfh;
   1392   1.23      fvdl 	u_quad_t frev, tempsize;
   1393   1.23      fvdl 	u_char cverf[NFSX_V3CREATEVERF];
   1394    1.1       cgd 
   1395   1.15   mycroft 	nd.ni_cnd.cn_nameiop = 0;
   1396  1.117      yamt 	nfsm_srvmtofh(&nsfh);
   1397   1.23      fvdl 	nfsm_srvnamesiz(len);
   1398   1.15   mycroft 	nd.ni_cnd.cn_cred = cred;
   1399   1.15   mycroft 	nd.ni_cnd.cn_nameiop = CREATE;
   1400   1.61       chs 	nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF;
   1401  1.117      yamt 	error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos,
   1402  1.125   thorpej 		&dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false);
   1403  1.120       chs 	if (dirp && v3) {
   1404  1.131     pooka 		dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred);
   1405   1.23      fvdl 	}
   1406   1.23      fvdl 	if (error) {
   1407   1.23      fvdl 		nfsm_reply(NFSX_WCCDATA(v3));
   1408   1.23      fvdl 		nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
   1409   1.23      fvdl 		if (dirp)
   1410   1.23      fvdl 			vrele(dirp);
   1411   1.23      fvdl 		return (0);
   1412   1.23      fvdl 	}
   1413   1.18   mycroft 	VATTR_NULL(&va);
   1414   1.23      fvdl 	if (v3) {
   1415   1.92      yamt 		va.va_mode = 0;
   1416   1.23      fvdl 		nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
   1417   1.23      fvdl 		how = fxdr_unsigned(int, *tl);
   1418   1.23      fvdl 		switch (how) {
   1419   1.23      fvdl 		case NFSV3CREATE_GUARDED:
   1420   1.23      fvdl 			if (nd.ni_vp) {
   1421   1.23      fvdl 				error = EEXIST;
   1422   1.23      fvdl 				break;
   1423   1.23      fvdl 			}
   1424   1.23      fvdl 		case NFSV3CREATE_UNCHECKED:
   1425   1.23      fvdl 			nfsm_srvsattr(&va);
   1426   1.23      fvdl 			break;
   1427   1.23      fvdl 		case NFSV3CREATE_EXCLUSIVE:
   1428  1.126  christos 			nfsm_dissect(cp, void *, NFSX_V3CREATEVERF);
   1429   1.44     perry 			memcpy(cverf, cp, NFSX_V3CREATEVERF);
   1430   1.23      fvdl 			exclusive_flag = 1;
   1431   1.23      fvdl 			break;
   1432   1.23      fvdl 		};
   1433   1.23      fvdl 		va.va_type = VREG;
   1434   1.23      fvdl 	} else {
   1435   1.23      fvdl 		nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
   1436   1.23      fvdl 		va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode));
   1437   1.23      fvdl 		if (va.va_type == VNON)
   1438   1.23      fvdl 			va.va_type = VREG;
   1439   1.23      fvdl 		va.va_mode = nfstov_mode(sp->sa_mode);
   1440   1.23      fvdl 		switch (va.va_type) {
   1441   1.23      fvdl 		case VREG:
   1442   1.23      fvdl 			tsize = fxdr_unsigned(int32_t, sp->sa_size);
   1443   1.23      fvdl 			if (tsize != -1)
   1444   1.23      fvdl 				va.va_size = (u_quad_t)tsize;
   1445   1.23      fvdl 			break;
   1446   1.23      fvdl 		case VCHR:
   1447   1.23      fvdl 		case VBLK:
   1448   1.23      fvdl 		case VFIFO:
   1449   1.23      fvdl 			rdev = fxdr_unsigned(int32_t, sp->sa_size);
   1450   1.23      fvdl 			break;
   1451   1.23      fvdl 		default:
   1452   1.23      fvdl 			break;
   1453   1.23      fvdl 		};
   1454   1.23      fvdl 	}
   1455   1.23      fvdl 
   1456    1.1       cgd 	/*
   1457   1.15   mycroft 	 * Iff doesn't exist, create it
   1458   1.15   mycroft 	 * otherwise just truncate to 0 length
   1459    1.1       cgd 	 *   should I set the mode too ??
   1460    1.1       cgd 	 */
   1461    1.1       cgd 	if (nd.ni_vp == NULL) {
   1462   1.18   mycroft 		if (va.va_type == VREG || va.va_type == VSOCK) {
   1463   1.23      fvdl 			nqsrv_getl(nd.ni_dvp, ND_WRITE);
   1464   1.23      fvdl 			error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va);
   1465   1.23      fvdl 			if (!error) {
   1466   1.23      fvdl 				if (exclusive_flag) {
   1467   1.23      fvdl 					exclusive_flag = 0;
   1468   1.23      fvdl 					VATTR_NULL(&va);
   1469   1.89      yamt 					/*
   1470   1.89      yamt 					 * XXX
   1471   1.89      yamt 					 * assuming NFSX_V3CREATEVERF
   1472   1.89      yamt 					 * == sizeof(nfstime3)
   1473   1.89      yamt 					 */
   1474   1.89      yamt 					fxdr_nfsv3time(cverf, &va.va_atime);
   1475  1.131     pooka 					error = VOP_SETATTR(nd.ni_vp, &va,
   1476  1.131     pooka 						cred);
   1477   1.23      fvdl 				}
   1478   1.23      fvdl 			}
   1479   1.18   mycroft 		} else if (va.va_type == VCHR || va.va_type == VBLK ||
   1480   1.18   mycroft 			va.va_type == VFIFO) {
   1481   1.18   mycroft 			if (va.va_type == VCHR && rdev == 0xffffffff)
   1482   1.18   mycroft 				va.va_type = VFIFO;
   1483   1.46       mrg 			if (va.va_type != VFIFO &&
   1484  1.136      elad 			    (error = kauth_authorize_system(cred,
   1485  1.136      elad 			    KAUTH_SYSTEM_MKNOD, 0, NULL, NULL, NULL))) {
   1486   1.15   mycroft 				VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
   1487    1.1       cgd 				vput(nd.ni_dvp);
   1488   1.23      fvdl 				nfsm_reply(0);
   1489   1.23      fvdl 				return (error);
   1490    1.1       cgd 			} else
   1491   1.18   mycroft 				va.va_rdev = (dev_t)rdev;
   1492   1.23      fvdl 			nqsrv_getl(nd.ni_dvp, ND_WRITE);
   1493   1.22  christos 			error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd,
   1494   1.23      fvdl 			    &va);
   1495   1.22  christos 			if (error) {
   1496    1.1       cgd 				nfsm_reply(0);
   1497    1.1       cgd 			}
   1498   1.15   mycroft 			if (nd.ni_cnd.cn_flags & ISSYMLINK) {
   1499  1.120       chs 				vput(nd.ni_vp);
   1500    1.1       cgd 				vrele(nd.ni_dvp);
   1501   1.15   mycroft 				VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
   1502    1.1       cgd 				error = EINVAL;
   1503    1.1       cgd 				nfsm_reply(0);
   1504    1.1       cgd 			}
   1505    1.1       cgd 		} else {
   1506   1.15   mycroft 			VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
   1507    1.1       cgd 			vput(nd.ni_dvp);
   1508    1.1       cgd 			error = ENXIO;
   1509    1.1       cgd 		}
   1510    1.1       cgd 		vp = nd.ni_vp;
   1511    1.1       cgd 	} else {
   1512  1.133      yamt 		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
   1513    1.1       cgd 		vp = nd.ni_vp;
   1514    1.1       cgd 		if (nd.ni_dvp == vp)
   1515    1.1       cgd 			vrele(nd.ni_dvp);
   1516    1.1       cgd 		else
   1517    1.1       cgd 			vput(nd.ni_dvp);
   1518   1.50   mycroft 		if (!error && va.va_size != -1) {
   1519   1.22  christos 			error = nfsrv_access(vp, VWRITE, cred,
   1520   1.99  christos 			    (nd.ni_cnd.cn_flags & RDONLY), lwp, 0);
   1521   1.23      fvdl 			if (!error) {
   1522   1.23      fvdl 				nqsrv_getl(vp, ND_WRITE);
   1523   1.23      fvdl 				tempsize = va.va_size;
   1524   1.23      fvdl 				VATTR_NULL(&va);
   1525   1.23      fvdl 				va.va_size = tempsize;
   1526  1.131     pooka 				error = VOP_SETATTR(vp, &va, cred);
   1527   1.15   mycroft 			}
   1528    1.1       cgd 		}
   1529   1.50   mycroft 		if (error)
   1530   1.50   mycroft 			vput(vp);
   1531    1.1       cgd 	}
   1532   1.23      fvdl 	if (!error) {
   1533  1.117      yamt 		error = nfsrv_composefh(vp, &nsfh, v3);
   1534   1.23      fvdl 		if (!error)
   1535  1.131     pooka 			error = VOP_GETATTR(vp, &va, cred);
   1536    1.1       cgd 		vput(vp);
   1537    1.1       cgd 	}
   1538   1.23      fvdl 	if (v3) {
   1539   1.89      yamt 		if (exclusive_flag && !error) {
   1540   1.89      yamt 			/*
   1541   1.89      yamt 			 * XXX assuming NFSX_V3CREATEVERF == sizeof(nfstime3)
   1542   1.89      yamt 			 */
   1543   1.89      yamt 			char oldverf[NFSX_V3CREATEVERF];
   1544   1.89      yamt 
   1545   1.89      yamt 			txdr_nfsv3time(&va.va_atime, oldverf);
   1546   1.89      yamt 			if (memcmp(cverf, oldverf, NFSX_V3CREATEVERF))
   1547   1.89      yamt 				error = EEXIST;
   1548   1.89      yamt 		}
   1549  1.105  christos 		if (dirp) {
   1550  1.131     pooka 			diraft_ret = VOP_GETATTR(dirp, &diraft, cred);
   1551  1.105  christos 		}
   1552   1.23      fvdl 	}
   1553  1.120       chs 	if (dirp) {
   1554  1.120       chs 		vrele(dirp);
   1555  1.120       chs 	}
   1556  1.117      yamt 	nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3));
   1557   1.23      fvdl 	if (v3) {
   1558   1.23      fvdl 		if (!error) {
   1559  1.117      yamt 			nfsm_srvpostop_fh(&nsfh);
   1560   1.23      fvdl 			nfsm_srvpostop_attr(0, &va);
   1561   1.23      fvdl 		}
   1562   1.23      fvdl 		nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
   1563   1.23      fvdl 	} else {
   1564  1.117      yamt 		nfsm_srvfhtom(&nsfh, v3);
   1565   1.23      fvdl 		nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR);
   1566   1.23      fvdl 		nfsm_srvfillattr(&va, fp);
   1567   1.23      fvdl 	}
   1568   1.23      fvdl 	return (0);
   1569    1.1       cgd nfsmout:
   1570   1.23      fvdl 	if (dirp)
   1571   1.23      fvdl 		vrele(dirp);
   1572   1.15   mycroft 	VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
   1573    1.1       cgd 	if (nd.ni_dvp == nd.ni_vp)
   1574    1.1       cgd 		vrele(nd.ni_dvp);
   1575    1.1       cgd 	else
   1576    1.1       cgd 		vput(nd.ni_dvp);
   1577    1.1       cgd 	if (nd.ni_vp)
   1578    1.1       cgd 		vput(nd.ni_vp);
   1579    1.1       cgd 	return (error);
   1580   1.23      fvdl }
   1581   1.23      fvdl 
   1582   1.23      fvdl /*
   1583   1.23      fvdl  * nfs v3 mknod service
   1584   1.23      fvdl  */
   1585   1.23      fvdl int
   1586   1.99  christos nfsrv_mknod(nfsd, slp, lwp, mrq)
   1587   1.23      fvdl 	struct nfsrv_descript *nfsd;
   1588   1.23      fvdl 	struct nfssvc_sock *slp;
   1589   1.99  christos 	struct lwp *lwp;
   1590   1.23      fvdl 	struct mbuf **mrq;
   1591   1.23      fvdl {
   1592   1.23      fvdl 	struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
   1593   1.23      fvdl 	struct mbuf *nam = nfsd->nd_nam;
   1594  1.126  christos 	char *dpos = nfsd->nd_dpos;
   1595  1.109      elad 	kauth_cred_t cred = nfsd->nd_cr;
   1596   1.23      fvdl 	struct vattr va, dirfor, diraft;
   1597   1.54  augustss 	u_int32_t *tl;
   1598   1.23      fvdl 	struct nameidata nd;
   1599   1.54  augustss 	int32_t t1;
   1600  1.126  christos 	char *bpos;
   1601  1.103  christos 	int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1;
   1602   1.23      fvdl 	u_int32_t major, minor;
   1603   1.23      fvdl 	enum vtype vtyp;
   1604   1.23      fvdl 	char *cp2;
   1605   1.67      matt 	struct mbuf *mb, *mreq;
   1606   1.23      fvdl 	struct vnode *vp, *dirp = (struct vnode *)0;
   1607  1.117      yamt 	nfsrvfh_t nsfh;
   1608   1.23      fvdl 	u_quad_t frev;
   1609   1.23      fvdl 
   1610   1.23      fvdl 	nd.ni_cnd.cn_nameiop = 0;
   1611  1.117      yamt 	nfsm_srvmtofh(&nsfh);
   1612   1.23      fvdl 	nfsm_srvnamesiz(len);
   1613   1.23      fvdl 	nd.ni_cnd.cn_cred = cred;
   1614   1.23      fvdl 	nd.ni_cnd.cn_nameiop = CREATE;
   1615   1.61       chs 	nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF;
   1616  1.117      yamt 	error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos,
   1617  1.125   thorpej 		&dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false);
   1618   1.23      fvdl 	if (dirp)
   1619  1.131     pooka 		dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred);
   1620   1.23      fvdl 	if (error) {
   1621   1.23      fvdl 		nfsm_reply(NFSX_WCCDATA(1));
   1622   1.23      fvdl 		nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
   1623   1.23      fvdl 		if (dirp)
   1624   1.23      fvdl 			vrele(dirp);
   1625   1.23      fvdl 		return (0);
   1626   1.23      fvdl 	}
   1627   1.23      fvdl 	nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
   1628   1.23      fvdl 	vtyp = nfsv3tov_type(*tl);
   1629   1.23      fvdl 	if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) {
   1630   1.23      fvdl 		error = NFSERR_BADTYPE;
   1631   1.95      yamt 		goto abort;
   1632   1.23      fvdl 	}
   1633   1.23      fvdl 	VATTR_NULL(&va);
   1634   1.92      yamt 	va.va_mode = 0;
   1635   1.23      fvdl 	nfsm_srvsattr(&va);
   1636   1.23      fvdl 	if (vtyp == VCHR || vtyp == VBLK) {
   1637   1.95      yamt 		dev_t rdev;
   1638   1.95      yamt 
   1639   1.23      fvdl 		nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
   1640   1.23      fvdl 		major = fxdr_unsigned(u_int32_t, *tl++);
   1641   1.23      fvdl 		minor = fxdr_unsigned(u_int32_t, *tl);
   1642   1.95      yamt 		rdev = makedev(major, minor);
   1643   1.95      yamt 		if (major(rdev) != major || minor(rdev) != minor) {
   1644   1.95      yamt 			error = EINVAL;
   1645   1.95      yamt 			goto abort;
   1646   1.95      yamt 		}
   1647   1.95      yamt 		va.va_rdev = rdev;
   1648   1.23      fvdl 	}
   1649    1.1       cgd 
   1650   1.23      fvdl 	/*
   1651   1.23      fvdl 	 * Iff doesn't exist, create it.
   1652   1.23      fvdl 	 */
   1653   1.23      fvdl 	if (nd.ni_vp) {
   1654   1.23      fvdl 		error = EEXIST;
   1655   1.95      yamt abort:
   1656   1.23      fvdl 		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
   1657   1.51  sommerfe 		if (nd.ni_dvp == nd.ni_vp)
   1658   1.51  sommerfe 			vrele(nd.ni_dvp);
   1659   1.51  sommerfe 		else
   1660   1.51  sommerfe 			vput(nd.ni_dvp);
   1661   1.95      yamt 		if (nd.ni_vp)
   1662   1.95      yamt 			vput(nd.ni_vp);
   1663   1.23      fvdl 		goto out;
   1664   1.23      fvdl 	}
   1665   1.23      fvdl 	va.va_type = vtyp;
   1666   1.23      fvdl 	if (vtyp == VSOCK) {
   1667   1.23      fvdl 		nqsrv_getl(nd.ni_dvp, ND_WRITE);
   1668   1.23      fvdl 		error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va);
   1669   1.23      fvdl 	} else {
   1670   1.46       mrg 		if (va.va_type != VFIFO &&
   1671  1.136      elad 		    (error = kauth_authorize_system(cred,
   1672  1.136      elad 		    KAUTH_SYSTEM_MKNOD, 0, NULL, NULL, NULL))) {
   1673   1.23      fvdl 			VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
   1674   1.23      fvdl 			vput(nd.ni_dvp);
   1675   1.23      fvdl 			goto out;
   1676   1.23      fvdl 		}
   1677   1.23      fvdl 		nqsrv_getl(nd.ni_dvp, ND_WRITE);
   1678   1.23      fvdl 		error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va);
   1679   1.23      fvdl 		if (error)
   1680   1.23      fvdl 			goto out;
   1681   1.23      fvdl 		if (nd.ni_cnd.cn_flags & ISSYMLINK) {
   1682   1.23      fvdl 			vput(nd.ni_vp);
   1683   1.23      fvdl 			VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
   1684   1.23      fvdl 			error = EINVAL;
   1685   1.23      fvdl 		}
   1686   1.23      fvdl 	}
   1687    1.1       cgd out:
   1688   1.23      fvdl 	vp = nd.ni_vp;
   1689   1.23      fvdl 	if (!error) {
   1690  1.125   thorpej 		error = nfsrv_composefh(vp, &nsfh, true);
   1691   1.23      fvdl 		if (!error)
   1692  1.131     pooka 			error = VOP_GETATTR(vp, &va, cred);
   1693   1.23      fvdl 		vput(vp);
   1694   1.23      fvdl 	}
   1695  1.104  christos 	if (dirp) {
   1696  1.131     pooka 		diraft_ret = VOP_GETATTR(dirp, &diraft, cred);
   1697  1.104  christos 		vrele(dirp);
   1698  1.104  christos 	}
   1699  1.125   thorpej 	nfsm_reply(NFSX_SRVFH(&nsfh, true) + NFSX_POSTOPATTR(1) +
   1700  1.117      yamt 	    NFSX_WCCDATA(1));
   1701   1.23      fvdl 	if (!error) {
   1702  1.117      yamt 		nfsm_srvpostop_fh(&nsfh);
   1703   1.23      fvdl 		nfsm_srvpostop_attr(0, &va);
   1704   1.23      fvdl 	}
   1705   1.23      fvdl 	nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
   1706   1.23      fvdl 	return (0);
   1707   1.23      fvdl nfsmout:
   1708   1.23      fvdl 	VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
   1709   1.23      fvdl 	if (nd.ni_dvp == nd.ni_vp)
   1710   1.23      fvdl 		vrele(nd.ni_dvp);
   1711   1.23      fvdl 	else
   1712   1.23      fvdl 		vput(nd.ni_dvp);
   1713   1.23      fvdl 	if (nd.ni_vp)
   1714   1.23      fvdl 		vput(nd.ni_vp);
   1715  1.120       chs 	if (dirp)
   1716  1.120       chs 		vrele(dirp);
   1717   1.23      fvdl 	return (error);
   1718    1.1       cgd }
   1719    1.1       cgd 
   1720    1.1       cgd /*
   1721    1.1       cgd  * nfs remove service
   1722    1.1       cgd  */
   1723   1.22  christos int
   1724   1.99  christos nfsrv_remove(nfsd, slp, lwp, mrq)
   1725   1.23      fvdl 	struct nfsrv_descript *nfsd;
   1726   1.23      fvdl 	struct nfssvc_sock *slp;
   1727   1.99  christos 	struct lwp *lwp;
   1728   1.23      fvdl 	struct mbuf **mrq;
   1729    1.1       cgd {
   1730   1.23      fvdl 	struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
   1731   1.23      fvdl 	struct mbuf *nam = nfsd->nd_nam;
   1732  1.126  christos 	char *dpos = nfsd->nd_dpos;
   1733  1.109      elad 	kauth_cred_t cred = nfsd->nd_cr;
   1734    1.1       cgd 	struct nameidata nd;
   1735   1.54  augustss 	u_int32_t *tl;
   1736   1.54  augustss 	int32_t t1;
   1737  1.126  christos 	char *bpos;
   1738  1.103  christos 	int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1;
   1739   1.23      fvdl 	int v3 = (nfsd->nd_flag & ND_NFSV3);
   1740    1.1       cgd 	char *cp2;
   1741    1.1       cgd 	struct mbuf *mb, *mreq;
   1742   1.23      fvdl 	struct vnode *vp, *dirp;
   1743   1.23      fvdl 	struct vattr dirfor, diraft;
   1744  1.117      yamt 	nfsrvfh_t nsfh;
   1745   1.15   mycroft 	u_quad_t frev;
   1746    1.1       cgd 
   1747   1.23      fvdl #ifndef nolint
   1748   1.23      fvdl 	vp = (struct vnode *)0;
   1749   1.23      fvdl #endif
   1750  1.117      yamt 	nfsm_srvmtofh(&nsfh);
   1751   1.23      fvdl 	nfsm_srvnamesiz(len);
   1752   1.15   mycroft 	nd.ni_cnd.cn_cred = cred;
   1753   1.15   mycroft 	nd.ni_cnd.cn_nameiop = DELETE;
   1754   1.15   mycroft 	nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF;
   1755  1.117      yamt 	error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos,
   1756  1.125   thorpej 		&dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false);
   1757  1.120       chs 	if (dirp && v3) {
   1758  1.131     pooka 		dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred);
   1759    1.1       cgd 	}
   1760   1.23      fvdl 	if (!error) {
   1761   1.23      fvdl 		vp = nd.ni_vp;
   1762  1.137      yamt 		if (vp->v_type == VDIR) {
   1763  1.137      yamt 			error = EPERM;
   1764   1.23      fvdl 			goto out;
   1765  1.137      yamt 		}
   1766   1.23      fvdl 		/*
   1767   1.23      fvdl 		 * The root of a mounted filesystem cannot be deleted.
   1768   1.23      fvdl 		 */
   1769  1.130        ad 		if (vp->v_vflag & VV_ROOT) {
   1770   1.23      fvdl 			error = EBUSY;
   1771   1.23      fvdl 		}
   1772   1.21   mycroft out:
   1773   1.23      fvdl 		if (!error) {
   1774   1.23      fvdl 			nqsrv_getl(nd.ni_dvp, ND_WRITE);
   1775   1.23      fvdl 			nqsrv_getl(vp, ND_WRITE);
   1776   1.23      fvdl 			error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
   1777   1.23      fvdl 		} else {
   1778   1.23      fvdl 			VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
   1779   1.23      fvdl 			if (nd.ni_dvp == vp)
   1780   1.23      fvdl 				vrele(nd.ni_dvp);
   1781   1.23      fvdl 			else
   1782   1.23      fvdl 				vput(nd.ni_dvp);
   1783   1.23      fvdl 			vput(vp);
   1784   1.23      fvdl 		}
   1785   1.23      fvdl 	}
   1786  1.120       chs 	if (dirp) {
   1787  1.120       chs 		if (v3) {
   1788  1.131     pooka 			diraft_ret = VOP_GETATTR(dirp, &diraft, cred);
   1789  1.120       chs 		}
   1790   1.23      fvdl 		vrele(dirp);
   1791   1.23      fvdl 	}
   1792   1.23      fvdl 	nfsm_reply(NFSX_WCCDATA(v3));
   1793   1.23      fvdl 	if (v3) {
   1794   1.23      fvdl 		nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
   1795   1.23      fvdl 		return (0);
   1796   1.23      fvdl 	}
   1797    1.1       cgd 	nfsm_srvdone;
   1798    1.1       cgd }
   1799    1.1       cgd 
   1800    1.1       cgd /*
   1801    1.1       cgd  * nfs rename service
   1802    1.1       cgd  */
   1803   1.22  christos int
   1804   1.99  christos nfsrv_rename(nfsd, slp, lwp, mrq)
   1805   1.23      fvdl 	struct nfsrv_descript *nfsd;
   1806   1.23      fvdl 	struct nfssvc_sock *slp;
   1807   1.99  christos 	struct lwp *lwp;
   1808   1.23      fvdl 	struct mbuf **mrq;
   1809    1.1       cgd {
   1810   1.23      fvdl 	struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
   1811   1.23      fvdl 	struct mbuf *nam = nfsd->nd_nam;
   1812  1.126  christos 	char *dpos = nfsd->nd_dpos;
   1813  1.109      elad 	kauth_cred_t cred = nfsd->nd_cr;
   1814   1.54  augustss 	u_int32_t *tl;
   1815   1.54  augustss 	int32_t t1;
   1816  1.126  christos 	char *bpos;
   1817  1.103  christos 	int error = 0, cache = 0, fdirfor_ret = 1, fdiraft_ret = 1;
   1818   1.68      yamt 	uint32_t len, len2;
   1819   1.23      fvdl 	int tdirfor_ret = 1, tdiraft_ret = 1;
   1820   1.23      fvdl 	int v3 = (nfsd->nd_flag & ND_NFSV3);
   1821    1.1       cgd 	char *cp2;
   1822    1.1       cgd 	struct mbuf *mb, *mreq;
   1823    1.1       cgd 	struct nameidata fromnd, tond;
   1824  1.120       chs 	struct vnode *fvp, *tvp, *tdvp;
   1825  1.120       chs 	struct vnode *fdirp = NULL, *tdirp = NULL;
   1826  1.134  dholland 	struct mount *localfs = NULL;
   1827   1.23      fvdl 	struct vattr fdirfor, fdiraft, tdirfor, tdiraft;
   1828  1.117      yamt 	nfsrvfh_t fnsfh, tnsfh;
   1829   1.15   mycroft 	u_quad_t frev;
   1830   1.15   mycroft 	uid_t saved_uid;
   1831  1.134  dholland 	uint32_t saveflag;
   1832    1.1       cgd 
   1833   1.23      fvdl #ifndef nolint
   1834   1.23      fvdl 	fvp = (struct vnode *)0;
   1835   1.23      fvdl #endif
   1836   1.15   mycroft 	fromnd.ni_cnd.cn_nameiop = 0;
   1837   1.15   mycroft 	tond.ni_cnd.cn_nameiop = 0;
   1838  1.117      yamt 	nfsm_srvmtofh(&fnsfh);
   1839   1.23      fvdl 	nfsm_srvnamesiz(len);
   1840    1.1       cgd 	/*
   1841   1.15   mycroft 	 * Remember our original uid so that we can reset cr_uid before
   1842   1.15   mycroft 	 * the second nfs_namei() call, in case it is remapped.
   1843    1.1       cgd 	 */
   1844  1.109      elad 	saved_uid = kauth_cred_geteuid(cred);
   1845   1.15   mycroft 	fromnd.ni_cnd.cn_cred = cred;
   1846   1.15   mycroft 	fromnd.ni_cnd.cn_nameiop = DELETE;
   1847  1.120       chs 	fromnd.ni_cnd.cn_flags = LOCKPARENT | SAVESTART;
   1848  1.117      yamt 	error = nfs_namei(&fromnd, &fnsfh, len, slp, nam, &md,
   1849  1.125   thorpej 		&dpos, &fdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false);
   1850  1.120       chs 	if (fdirp && v3) {
   1851  1.131     pooka 		fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred);
   1852   1.23      fvdl 	}
   1853   1.23      fvdl 	if (error) {
   1854   1.23      fvdl 		nfsm_reply(2 * NFSX_WCCDATA(v3));
   1855   1.23      fvdl 		nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft);
   1856   1.23      fvdl 		nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft);
   1857   1.23      fvdl 		if (fdirp)
   1858  1.123       chs 			vrele(fdirp);
   1859   1.23      fvdl 		return (0);
   1860   1.23      fvdl 	}
   1861  1.123       chs 	if (fromnd.ni_dvp != fromnd.ni_vp) {
   1862  1.123       chs 		VOP_UNLOCK(fromnd.ni_dvp, 0);
   1863  1.123       chs 	}
   1864    1.1       cgd 	fvp = fromnd.ni_vp;
   1865  1.134  dholland 
   1866  1.134  dholland 	localfs = fvp->v_mount;
   1867  1.134  dholland 	error = VFS_RENAMELOCK_ENTER(localfs);
   1868  1.134  dholland 	if (error) {
   1869  1.134  dholland 		VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
   1870  1.134  dholland 		vrele(fromnd.ni_dvp);
   1871  1.134  dholland 		vrele(fvp);
   1872  1.134  dholland 		goto out1;
   1873  1.134  dholland 	}
   1874  1.134  dholland 
   1875  1.134  dholland 	/* Copied, regrettably, from vfs_syscalls.c (q.v.) */
   1876  1.134  dholland 	vrele(fvp);
   1877  1.138  dholland 	if ((fromnd.ni_cnd.cn_namelen == 1 &&
   1878  1.138  dholland 	     fromnd.ni_cnd.cn_nameptr[0] == '.') ||
   1879  1.138  dholland 	    (fromnd.ni_cnd.cn_namelen == 2 &&
   1880  1.138  dholland 	     fromnd.ni_cnd.cn_nameptr[0] == '.' &&
   1881  1.138  dholland 	     fromnd.ni_cnd.cn_nameptr[1] == '.')) {
   1882  1.138  dholland 		error = EINVAL;
   1883  1.138  dholland 		VFS_RENAMELOCK_EXIT(localfs);
   1884  1.138  dholland 		VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
   1885  1.138  dholland 		vrele(fromnd.ni_dvp);
   1886  1.138  dholland 		goto out1;
   1887  1.138  dholland 	}
   1888  1.134  dholland 	saveflag = fromnd.ni_cnd.cn_flags & SAVESTART;
   1889  1.134  dholland 	fromnd.ni_cnd.cn_flags &= ~SAVESTART;
   1890  1.134  dholland 	vn_lock(fromnd.ni_dvp, LK_EXCLUSIVE | LK_RETRY);
   1891  1.134  dholland 	error = relookup(fromnd.ni_dvp, &fromnd.ni_vp, &fromnd.ni_cnd);
   1892  1.134  dholland 	fromnd.ni_cnd.cn_flags |= saveflag;
   1893  1.134  dholland 	if (error) {
   1894  1.134  dholland 		VOP_UNLOCK(fromnd.ni_dvp, 0);
   1895  1.134  dholland 		VFS_RENAMELOCK_EXIT(localfs);
   1896  1.134  dholland 		VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
   1897  1.134  dholland 		vrele(fromnd.ni_dvp);
   1898  1.134  dholland 		goto out1;
   1899  1.134  dholland 	}
   1900  1.134  dholland 	VOP_UNLOCK(fromnd.ni_vp, 0);
   1901  1.134  dholland 	if (fromnd.ni_dvp != fromnd.ni_vp)
   1902  1.134  dholland 		VOP_UNLOCK(fromnd.ni_dvp, 0);
   1903  1.134  dholland 	fvp = fromnd.ni_vp;
   1904  1.134  dholland 
   1905  1.117      yamt 	nfsm_srvmtofh(&tnsfh);
   1906   1.68      yamt 	if (v3) {
   1907   1.68      yamt 		nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED);
   1908   1.68      yamt 		len2 = fxdr_unsigned(uint32_t, *tl);
   1909   1.68      yamt 		/* len2 will be checked by nfs_namei */
   1910   1.68      yamt 	}
   1911   1.68      yamt 	else {
   1912   1.68      yamt 		/* NFSv2 */
   1913   1.68      yamt 		nfsm_strsiz(len2, NFS_MAXNAMLEN);
   1914   1.68      yamt 	}
   1915  1.109      elad 	kauth_cred_seteuid(cred, saved_uid);
   1916   1.15   mycroft 	tond.ni_cnd.cn_cred = cred;
   1917   1.15   mycroft 	tond.ni_cnd.cn_nameiop = RENAME;
   1918   1.15   mycroft 	tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART;
   1919  1.117      yamt 	error = nfs_namei(&tond, &tnsfh, len2, slp, nam, &md,
   1920  1.125   thorpej 		&dpos, &tdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false);
   1921  1.120       chs 	if (tdirp && v3) {
   1922  1.131     pooka 		tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred);
   1923   1.23      fvdl 	}
   1924   1.22  christos 	if (error) {
   1925  1.134  dholland 		VFS_RENAMELOCK_EXIT(localfs);
   1926   1.15   mycroft 		VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
   1927    1.1       cgd 		vrele(fromnd.ni_dvp);
   1928    1.1       cgd 		vrele(fvp);
   1929    1.1       cgd 		goto out1;
   1930    1.1       cgd 	}
   1931    1.1       cgd 	tdvp = tond.ni_dvp;
   1932    1.1       cgd 	tvp = tond.ni_vp;
   1933    1.1       cgd 	if (tvp != NULL) {
   1934    1.1       cgd 		if (fvp->v_type == VDIR && tvp->v_type != VDIR) {
   1935   1.23      fvdl 			if (v3)
   1936   1.23      fvdl 				error = EEXIST;
   1937   1.23      fvdl 			else
   1938   1.23      fvdl 				error = EISDIR;
   1939    1.1       cgd 			goto out;
   1940    1.1       cgd 		} else if (fvp->v_type != VDIR && tvp->v_type == VDIR) {
   1941   1.23      fvdl 			if (v3)
   1942   1.23      fvdl 				error = EEXIST;
   1943   1.23      fvdl 			else
   1944   1.23      fvdl 				error = ENOTDIR;
   1945    1.1       cgd 			goto out;
   1946    1.1       cgd 		}
   1947   1.15   mycroft 		if (tvp->v_type == VDIR && tvp->v_mountedhere) {
   1948   1.23      fvdl 			if (v3)
   1949   1.23      fvdl 				error = EXDEV;
   1950   1.23      fvdl 			else
   1951   1.23      fvdl 				error = ENOTEMPTY;
   1952   1.15   mycroft 			goto out;
   1953   1.15   mycroft 		}
   1954   1.15   mycroft 	}
   1955   1.15   mycroft 	if (fvp->v_type == VDIR && fvp->v_mountedhere) {
   1956   1.23      fvdl 		if (v3)
   1957   1.23      fvdl 			error = EXDEV;
   1958   1.23      fvdl 		else
   1959   1.23      fvdl 			error = ENOTEMPTY;
   1960   1.15   mycroft 		goto out;
   1961    1.1       cgd 	}
   1962    1.1       cgd 	if (fvp->v_mount != tdvp->v_mount) {
   1963   1.23      fvdl 		if (v3)
   1964   1.23      fvdl 			error = EXDEV;
   1965   1.23      fvdl 		else
   1966   1.23      fvdl 			error = ENOTEMPTY;
   1967    1.1       cgd 		goto out;
   1968    1.1       cgd 	}
   1969   1.45   thorpej 	if (fvp == tdvp) {
   1970   1.23      fvdl 		if (v3)
   1971   1.23      fvdl 			error = EINVAL;
   1972   1.23      fvdl 		else
   1973   1.23      fvdl 			error = ENOTEMPTY;
   1974   1.45   thorpej 	}
   1975    1.1       cgd 	/*
   1976    1.1       cgd 	 * If source is the same as the destination (that is the
   1977    1.1       cgd 	 * same vnode with the same name in the same directory),
   1978    1.1       cgd 	 * then there is nothing to do.
   1979    1.1       cgd 	 */
   1980    1.1       cgd 	if (fvp == tvp && fromnd.ni_dvp == tdvp &&
   1981   1.15   mycroft 	    fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen &&
   1982   1.44     perry 	    !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr,
   1983   1.15   mycroft 	      fromnd.ni_cnd.cn_namelen))
   1984    1.1       cgd 		error = -1;
   1985    1.1       cgd out:
   1986    1.1       cgd 	if (!error) {
   1987   1.23      fvdl 		nqsrv_getl(fromnd.ni_dvp, ND_WRITE);
   1988   1.23      fvdl 		nqsrv_getl(tdvp, ND_WRITE);
   1989   1.30      fvdl 		if (tvp) {
   1990   1.23      fvdl 			nqsrv_getl(tvp, ND_WRITE);
   1991   1.30      fvdl 		}
   1992   1.15   mycroft 		error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd,
   1993   1.15   mycroft 				   tond.ni_dvp, tond.ni_vp, &tond.ni_cnd);
   1994  1.134  dholland 		VFS_RENAMELOCK_EXIT(localfs);
   1995    1.1       cgd 	} else {
   1996   1.15   mycroft 		VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd);
   1997    1.1       cgd 		if (tdvp == tvp)
   1998    1.1       cgd 			vrele(tdvp);
   1999    1.1       cgd 		else
   2000    1.1       cgd 			vput(tdvp);
   2001    1.1       cgd 		if (tvp)
   2002    1.1       cgd 			vput(tvp);
   2003  1.134  dholland 		VFS_RENAMELOCK_EXIT(localfs);
   2004   1.15   mycroft 		VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
   2005    1.1       cgd 		vrele(fromnd.ni_dvp);
   2006    1.1       cgd 		vrele(fvp);
   2007   1.23      fvdl 		if (error == -1)
   2008   1.23      fvdl 			error = 0;
   2009    1.1       cgd 	}
   2010    1.1       cgd 	vrele(tond.ni_startdir);
   2011   1.57   thorpej 	PNBUF_PUT(tond.ni_cnd.cn_pnbuf);
   2012    1.1       cgd out1:
   2013   1.23      fvdl 	if (fdirp) {
   2014  1.120       chs 		if (v3) {
   2015  1.131     pooka 			fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred);
   2016  1.120       chs 		}
   2017   1.23      fvdl 		vrele(fdirp);
   2018   1.23      fvdl 	}
   2019   1.23      fvdl 	if (tdirp) {
   2020  1.120       chs 		if (v3) {
   2021  1.131     pooka 			tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred);
   2022  1.120       chs 		}
   2023   1.23      fvdl 		vrele(tdirp);
   2024   1.23      fvdl 	}
   2025    1.1       cgd 	vrele(fromnd.ni_startdir);
   2026   1.57   thorpej 	PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf);
   2027   1.23      fvdl 	nfsm_reply(2 * NFSX_WCCDATA(v3));
   2028   1.23      fvdl 	if (v3) {
   2029   1.23      fvdl 		nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft);
   2030   1.23      fvdl 		nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft);
   2031   1.23      fvdl 	}
   2032   1.23      fvdl 	return (0);
   2033    1.1       cgd 
   2034    1.1       cgd nfsmout:
   2035   1.23      fvdl 	if (fdirp)
   2036   1.23      fvdl 		vrele(fdirp);
   2037  1.106  christos #ifdef notdef
   2038   1.23      fvdl 	if (tdirp)
   2039   1.23      fvdl 		vrele(tdirp);
   2040  1.106  christos #endif
   2041   1.23      fvdl 	if (tond.ni_cnd.cn_nameiop) {
   2042    1.1       cgd 		vrele(tond.ni_startdir);
   2043   1.57   thorpej 		PNBUF_PUT(tond.ni_cnd.cn_pnbuf);
   2044    1.1       cgd 	}
   2045  1.134  dholland 	if (localfs) {
   2046  1.134  dholland 		VFS_RENAMELOCK_EXIT(localfs);
   2047  1.134  dholland 	}
   2048   1.23      fvdl 	if (fromnd.ni_cnd.cn_nameiop) {
   2049    1.1       cgd 		vrele(fromnd.ni_startdir);
   2050   1.57   thorpej 		PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf);
   2051   1.15   mycroft 		VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
   2052    1.1       cgd 		vrele(fromnd.ni_dvp);
   2053    1.1       cgd 		vrele(fvp);
   2054    1.1       cgd 	}
   2055    1.1       cgd 	return (error);
   2056    1.1       cgd }
   2057    1.1       cgd 
   2058    1.1       cgd /*
   2059    1.1       cgd  * nfs link service
   2060    1.1       cgd  */
   2061   1.22  christos int
   2062   1.99  christos nfsrv_link(nfsd, slp, lwp, mrq)
   2063   1.23      fvdl 	struct nfsrv_descript *nfsd;
   2064   1.23      fvdl 	struct nfssvc_sock *slp;
   2065   1.99  christos 	struct lwp *lwp;
   2066   1.23      fvdl 	struct mbuf **mrq;
   2067    1.1       cgd {
   2068   1.23      fvdl 	struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
   2069   1.23      fvdl 	struct mbuf *nam = nfsd->nd_nam;
   2070  1.126  christos 	char *dpos = nfsd->nd_dpos;
   2071  1.109      elad 	kauth_cred_t cred = nfsd->nd_cr;
   2072    1.1       cgd 	struct nameidata nd;
   2073   1.54  augustss 	u_int32_t *tl;
   2074   1.54  augustss 	int32_t t1;
   2075  1.126  christos 	char *bpos;
   2076  1.103  christos 	int error = 0, rdonly, cache = 0, len, dirfor_ret = 1, diraft_ret = 1;
   2077   1.23      fvdl 	int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3);
   2078    1.1       cgd 	char *cp2;
   2079    1.1       cgd 	struct mbuf *mb, *mreq;
   2080   1.23      fvdl 	struct vnode *vp, *xp, *dirp = (struct vnode *)0;
   2081   1.23      fvdl 	struct vattr dirfor, diraft, at;
   2082  1.117      yamt 	nfsrvfh_t nsfh, dnsfh;
   2083   1.15   mycroft 	u_quad_t frev;
   2084    1.1       cgd 
   2085  1.117      yamt 	nfsm_srvmtofh(&nsfh);
   2086  1.117      yamt 	nfsm_srvmtofh(&dnsfh);
   2087   1.23      fvdl 	nfsm_srvnamesiz(len);
   2088  1.125   thorpej 	error = nfsrv_fhtovp(&nsfh, false, &vp, cred, slp, nam,
   2089  1.125   thorpej 		 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false);
   2090   1.23      fvdl 	if (error) {
   2091   1.23      fvdl 		nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3));
   2092   1.23      fvdl 		nfsm_srvpostop_attr(getret, &at);
   2093   1.23      fvdl 		nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
   2094   1.23      fvdl 		return (0);
   2095   1.23      fvdl 	}
   2096  1.137      yamt 	if (vp->v_type == VDIR) {
   2097  1.137      yamt 		error = EPERM;
   2098   1.23      fvdl 		goto out1;
   2099  1.137      yamt 	}
   2100   1.15   mycroft 	nd.ni_cnd.cn_cred = cred;
   2101   1.15   mycroft 	nd.ni_cnd.cn_nameiop = CREATE;
   2102   1.15   mycroft 	nd.ni_cnd.cn_flags = LOCKPARENT;
   2103  1.117      yamt 	error = nfs_namei(&nd, &dnsfh, len, slp, nam, &md, &dpos,
   2104  1.125   thorpej 		&dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false);
   2105  1.120       chs 	if (dirp && v3) {
   2106  1.131     pooka 		dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred);
   2107   1.23      fvdl 	}
   2108   1.22  christos 	if (error)
   2109   1.23      fvdl 		goto out1;
   2110   1.23      fvdl 	xp = nd.ni_vp;
   2111   1.23      fvdl 	if (xp != NULL) {
   2112   1.23      fvdl 		error = EEXIST;
   2113    1.1       cgd 		goto out;
   2114   1.23      fvdl 	}
   2115   1.23      fvdl 	xp = nd.ni_dvp;
   2116   1.23      fvdl 	if (vp->v_mount != xp->v_mount)
   2117   1.23      fvdl 		error = EXDEV;
   2118   1.23      fvdl out:
   2119   1.23      fvdl 	if (!error) {
   2120   1.23      fvdl 		nqsrv_getl(vp, ND_WRITE);
   2121   1.23      fvdl 		nqsrv_getl(xp, ND_WRITE);
   2122   1.23      fvdl 		error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd);
   2123   1.23      fvdl 	} else {
   2124   1.15   mycroft 		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
   2125    1.1       cgd 		if (nd.ni_dvp == nd.ni_vp)
   2126    1.1       cgd 			vrele(nd.ni_dvp);
   2127    1.1       cgd 		else
   2128    1.1       cgd 			vput(nd.ni_dvp);
   2129   1.23      fvdl 		if (nd.ni_vp)
   2130   1.23      fvdl 			vrele(nd.ni_vp);
   2131   1.23      fvdl 	}
   2132   1.23      fvdl out1:
   2133   1.23      fvdl 	if (v3)
   2134  1.131     pooka 		getret = VOP_GETATTR(vp, &at, cred);
   2135   1.23      fvdl 	if (dirp) {
   2136  1.120       chs 		if (v3) {
   2137  1.131     pooka 			diraft_ret = VOP_GETATTR(dirp, &diraft, cred);
   2138  1.120       chs 		}
   2139   1.23      fvdl 		vrele(dirp);
   2140    1.1       cgd 	}
   2141    1.1       cgd 	vrele(vp);
   2142   1.23      fvdl 	nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3));
   2143   1.23      fvdl 	if (v3) {
   2144   1.23      fvdl 		nfsm_srvpostop_attr(getret, &at);
   2145   1.23      fvdl 		nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
   2146   1.23      fvdl 		return (0);
   2147   1.23      fvdl 	}
   2148    1.1       cgd 	nfsm_srvdone;
   2149    1.1       cgd }
   2150    1.1       cgd 
   2151    1.1       cgd /*
   2152    1.1       cgd  * nfs symbolic link service
   2153    1.1       cgd  */
   2154   1.22  christos int
   2155   1.99  christos nfsrv_symlink(nfsd, slp, lwp, mrq)
   2156   1.23      fvdl 	struct nfsrv_descript *nfsd;
   2157   1.23      fvdl 	struct nfssvc_sock *slp;
   2158   1.99  christos 	struct lwp *lwp;
   2159   1.23      fvdl 	struct mbuf **mrq;
   2160    1.1       cgd {
   2161   1.23      fvdl 	struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
   2162   1.23      fvdl 	struct mbuf *nam = nfsd->nd_nam;
   2163  1.126  christos 	char *dpos = nfsd->nd_dpos;
   2164  1.109      elad 	kauth_cred_t cred = nfsd->nd_cr;
   2165   1.23      fvdl 	struct vattr va, dirfor, diraft;
   2166    1.1       cgd 	struct nameidata nd;
   2167   1.54  augustss 	u_int32_t *tl;
   2168   1.54  augustss 	int32_t t1;
   2169    1.1       cgd 	struct nfsv2_sattr *sp;
   2170   1.23      fvdl 	char *bpos, *pathcp = NULL, *cp2;
   2171    1.1       cgd 	struct uio io;
   2172    1.1       cgd 	struct iovec iv;
   2173  1.103  christos 	int error = 0, cache = 0, dirfor_ret = 1, diraft_ret = 1;
   2174   1.68      yamt 	uint32_t len, len2;
   2175   1.23      fvdl 	int v3 = (nfsd->nd_flag & ND_NFSV3);
   2176   1.67      matt 	struct mbuf *mb, *mreq;
   2177   1.23      fvdl 	struct vnode *dirp = (struct vnode *)0;
   2178  1.117      yamt 	nfsrvfh_t nsfh;
   2179   1.15   mycroft 	u_quad_t frev;
   2180    1.1       cgd 
   2181   1.23      fvdl 	nd.ni_cnd.cn_nameiop = 0;
   2182  1.117      yamt 	nfsm_srvmtofh(&nsfh);
   2183   1.23      fvdl 	nfsm_srvnamesiz(len);
   2184   1.15   mycroft 	nd.ni_cnd.cn_cred = cred;
   2185   1.15   mycroft 	nd.ni_cnd.cn_nameiop = CREATE;
   2186   1.61       chs 	nd.ni_cnd.cn_flags = LOCKPARENT;
   2187  1.117      yamt 	error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos,
   2188  1.125   thorpej 		&dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false);
   2189  1.120       chs 	if (dirp && v3) {
   2190  1.131     pooka 		dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred);
   2191   1.23      fvdl 	}
   2192   1.22  christos 	if (error)
   2193    1.1       cgd 		goto out;
   2194   1.23      fvdl 	VATTR_NULL(&va);
   2195   1.97      jmmv 	va.va_type = VLNK;
   2196   1.68      yamt 	if (v3) {
   2197   1.92      yamt 		va.va_mode = 0;
   2198   1.23      fvdl 		nfsm_srvsattr(&va);
   2199   1.68      yamt 		nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED);
   2200   1.68      yamt 		len2 = fxdr_unsigned(uint32_t, *tl);
   2201   1.68      yamt 		if (len2 > PATH_MAX) {
   2202   1.68      yamt 			/* XXX should check _PC_NO_TRUNC */
   2203   1.68      yamt 			error = ENAMETOOLONG;
   2204   1.68      yamt 			goto abortop;
   2205   1.68      yamt 		}
   2206   1.68      yamt 	}
   2207   1.68      yamt 	else {
   2208   1.68      yamt 		/* NFSv2 */
   2209   1.68      yamt 		nfsm_strsiz(len2, NFS_MAXPATHLEN);
   2210   1.68      yamt 	}
   2211   1.56   thorpej 	pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK);
   2212    1.1       cgd 	iv.iov_base = pathcp;
   2213    1.1       cgd 	iv.iov_len = len2;
   2214    1.1       cgd 	io.uio_resid = len2;
   2215    1.1       cgd 	io.uio_offset = 0;
   2216    1.1       cgd 	io.uio_iov = &iv;
   2217    1.1       cgd 	io.uio_iovcnt = 1;
   2218    1.1       cgd 	io.uio_rw = UIO_READ;
   2219  1.101      yamt 	UIO_SETUP_SYSSPACE(&io);
   2220    1.1       cgd 	nfsm_mtouio(&io, len2);
   2221   1.23      fvdl 	if (!v3) {
   2222   1.23      fvdl 		nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
   2223   1.23      fvdl 		va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode);
   2224   1.23      fvdl 	}
   2225    1.1       cgd 	*(pathcp + len2) = '\0';
   2226    1.1       cgd 	if (nd.ni_vp) {
   2227   1.68      yamt 		error = EEXIST;
   2228   1.68      yamt abortop:
   2229   1.15   mycroft 		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
   2230    1.1       cgd 		if (nd.ni_dvp == nd.ni_vp)
   2231    1.1       cgd 			vrele(nd.ni_dvp);
   2232    1.1       cgd 		else
   2233    1.1       cgd 			vput(nd.ni_dvp);
   2234   1.68      yamt 		if (nd.ni_vp)
   2235   1.68      yamt 			vrele(nd.ni_vp);
   2236    1.1       cgd 		goto out;
   2237    1.1       cgd 	}
   2238   1.23      fvdl 	nqsrv_getl(nd.ni_dvp, ND_WRITE);
   2239   1.23      fvdl 	error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp);
   2240   1.61       chs 	if (!error) {
   2241   1.23      fvdl 	    if (v3) {
   2242  1.117      yamt 		error = nfsrv_composefh(nd.ni_vp, &nsfh, v3);
   2243   1.60     assar 		if (!error)
   2244  1.131     pooka 		    error = VOP_GETATTR(nd.ni_vp, &va, cred);
   2245   1.60     assar 		vput(nd.ni_vp);
   2246   1.60     assar 	    } else {
   2247   1.60     assar 		vput(nd.ni_vp);
   2248   1.60     assar 	    }
   2249   1.23      fvdl 	}
   2250    1.1       cgd out:
   2251    1.1       cgd 	if (pathcp)
   2252   1.56   thorpej 		free(pathcp, M_TEMP);
   2253   1.23      fvdl 	if (dirp) {
   2254  1.120       chs 		if (v3) {
   2255  1.131     pooka 			diraft_ret = VOP_GETATTR(dirp, &diraft, cred);
   2256  1.120       chs 		}
   2257   1.23      fvdl 		vrele(dirp);
   2258   1.23      fvdl 	}
   2259  1.117      yamt 	nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) +
   2260  1.117      yamt 	    NFSX_WCCDATA(v3));
   2261   1.23      fvdl 	if (v3) {
   2262   1.23      fvdl 		if (!error) {
   2263  1.117      yamt 			nfsm_srvpostop_fh(&nsfh);
   2264   1.23      fvdl 			nfsm_srvpostop_attr(0, &va);
   2265   1.23      fvdl 		}
   2266   1.23      fvdl 		nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
   2267   1.23      fvdl 	}
   2268   1.23      fvdl 	return (0);
   2269    1.1       cgd nfsmout:
   2270   1.15   mycroft 	VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
   2271    1.1       cgd 	if (nd.ni_dvp == nd.ni_vp)
   2272    1.1       cgd 		vrele(nd.ni_dvp);
   2273    1.1       cgd 	else
   2274    1.1       cgd 		vput(nd.ni_dvp);
   2275    1.1       cgd 	if (nd.ni_vp)
   2276    1.1       cgd 		vrele(nd.ni_vp);
   2277  1.120       chs 	if (dirp)
   2278  1.120       chs 		vrele(dirp);
   2279    1.1       cgd 	if (pathcp)
   2280   1.56   thorpej 		free(pathcp, M_TEMP);
   2281    1.1       cgd 	return (error);
   2282    1.1       cgd }
   2283    1.1       cgd 
   2284    1.1       cgd /*
   2285    1.1       cgd  * nfs mkdir service
   2286    1.1       cgd  */
   2287   1.22  christos int
   2288   1.99  christos nfsrv_mkdir(nfsd, slp, lwp, mrq)
   2289   1.23      fvdl 	struct nfsrv_descript *nfsd;
   2290   1.23      fvdl 	struct nfssvc_sock *slp;
   2291   1.99  christos 	struct lwp *lwp;
   2292   1.23      fvdl 	struct mbuf **mrq;
   2293    1.1       cgd {
   2294   1.23      fvdl 	struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
   2295   1.23      fvdl 	struct mbuf *nam = nfsd->nd_nam;
   2296  1.126  christos 	char *dpos = nfsd->nd_dpos;
   2297  1.109      elad 	kauth_cred_t cred = nfsd->nd_cr;
   2298   1.23      fvdl 	struct vattr va, dirfor, diraft;
   2299   1.54  augustss 	struct nfs_fattr *fp;
   2300    1.1       cgd 	struct nameidata nd;
   2301  1.126  christos 	char *cp;
   2302   1.54  augustss 	u_int32_t *tl;
   2303   1.54  augustss 	int32_t t1;
   2304  1.126  christos 	char *bpos;
   2305  1.103  christos 	int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1;
   2306   1.23      fvdl 	int v3 = (nfsd->nd_flag & ND_NFSV3);
   2307    1.1       cgd 	char *cp2;
   2308   1.67      matt 	struct mbuf *mb, *mreq;
   2309   1.23      fvdl 	struct vnode *vp, *dirp = (struct vnode *)0;
   2310  1.117      yamt 	nfsrvfh_t nsfh;
   2311   1.15   mycroft 	u_quad_t frev;
   2312    1.1       cgd 
   2313  1.117      yamt 	nfsm_srvmtofh(&nsfh);
   2314   1.23      fvdl 	nfsm_srvnamesiz(len);
   2315   1.15   mycroft 	nd.ni_cnd.cn_cred = cred;
   2316   1.15   mycroft 	nd.ni_cnd.cn_nameiop = CREATE;
   2317   1.15   mycroft 	nd.ni_cnd.cn_flags = LOCKPARENT;
   2318  1.117      yamt 	error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos,
   2319  1.125   thorpej 		&dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false);
   2320  1.120       chs 	if (dirp && v3) {
   2321  1.131     pooka 		dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred);
   2322   1.23      fvdl 	}
   2323   1.23      fvdl 	if (error) {
   2324   1.23      fvdl 		nfsm_reply(NFSX_WCCDATA(v3));
   2325   1.23      fvdl 		nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
   2326   1.23      fvdl 		if (dirp)
   2327   1.23      fvdl 			vrele(dirp);
   2328   1.23      fvdl 		return (0);
   2329   1.23      fvdl 	}
   2330   1.18   mycroft 	VATTR_NULL(&va);
   2331   1.23      fvdl 	if (v3) {
   2332   1.92      yamt 		va.va_mode = 0;
   2333   1.23      fvdl 		nfsm_srvsattr(&va);
   2334   1.23      fvdl 	} else {
   2335   1.23      fvdl 		nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
   2336   1.23      fvdl 		va.va_mode = nfstov_mode(*tl++);
   2337   1.23      fvdl 	}
   2338   1.18   mycroft 	va.va_type = VDIR;
   2339    1.1       cgd 	vp = nd.ni_vp;
   2340    1.1       cgd 	if (vp != NULL) {
   2341   1.15   mycroft 		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
   2342    1.1       cgd 		if (nd.ni_dvp == vp)
   2343    1.1       cgd 			vrele(nd.ni_dvp);
   2344    1.1       cgd 		else
   2345    1.1       cgd 			vput(nd.ni_dvp);
   2346    1.1       cgd 		vrele(vp);
   2347    1.1       cgd 		error = EEXIST;
   2348   1.23      fvdl 		goto out;
   2349    1.1       cgd 	}
   2350   1.23      fvdl 	nqsrv_getl(nd.ni_dvp, ND_WRITE);
   2351   1.23      fvdl 	error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va);
   2352   1.23      fvdl 	if (!error) {
   2353   1.23      fvdl 		vp = nd.ni_vp;
   2354  1.117      yamt 		error = nfsrv_composefh(vp, &nsfh, v3);
   2355   1.23      fvdl 		if (!error)
   2356  1.131     pooka 			error = VOP_GETATTR(vp, &va, cred);
   2357    1.1       cgd 		vput(vp);
   2358    1.1       cgd 	}
   2359   1.23      fvdl out:
   2360   1.23      fvdl 	if (dirp) {
   2361  1.120       chs 		if (v3) {
   2362  1.131     pooka 			diraft_ret = VOP_GETATTR(dirp, &diraft, cred);
   2363  1.120       chs 		}
   2364   1.23      fvdl 		vrele(dirp);
   2365   1.23      fvdl 	}
   2366  1.117      yamt 	nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) +
   2367  1.117      yamt 	    NFSX_WCCDATA(v3));
   2368   1.23      fvdl 	if (v3) {
   2369   1.23      fvdl 		if (!error) {
   2370  1.117      yamt 			nfsm_srvpostop_fh(&nsfh);
   2371   1.23      fvdl 			nfsm_srvpostop_attr(0, &va);
   2372   1.23      fvdl 		}
   2373   1.23      fvdl 		nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
   2374   1.23      fvdl 	} else {
   2375  1.117      yamt 		nfsm_srvfhtom(&nsfh, v3);
   2376   1.23      fvdl 		nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR);
   2377   1.23      fvdl 		nfsm_srvfillattr(&va, fp);
   2378   1.23      fvdl 	}
   2379   1.23      fvdl 	return (0);
   2380    1.1       cgd nfsmout:
   2381   1.15   mycroft 	VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
   2382    1.1       cgd 	if (nd.ni_dvp == nd.ni_vp)
   2383    1.1       cgd 		vrele(nd.ni_dvp);
   2384    1.1       cgd 	else
   2385    1.1       cgd 		vput(nd.ni_dvp);
   2386    1.1       cgd 	if (nd.ni_vp)
   2387    1.1       cgd 		vrele(nd.ni_vp);
   2388  1.120       chs 	if (dirp)
   2389  1.120       chs 		vrele(dirp);
   2390    1.1       cgd 	return (error);
   2391    1.1       cgd }
   2392    1.1       cgd 
   2393    1.1       cgd /*
   2394    1.1       cgd  * nfs rmdir service
   2395    1.1       cgd  */
   2396   1.22  christos int
   2397   1.99  christos nfsrv_rmdir(nfsd, slp, lwp, mrq)
   2398   1.23      fvdl 	struct nfsrv_descript *nfsd;
   2399   1.23      fvdl 	struct nfssvc_sock *slp;
   2400   1.99  christos 	struct lwp *lwp;
   2401   1.23      fvdl 	struct mbuf **mrq;
   2402    1.1       cgd {
   2403   1.23      fvdl 	struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
   2404   1.23      fvdl 	struct mbuf *nam = nfsd->nd_nam;
   2405  1.126  christos 	char *dpos = nfsd->nd_dpos;
   2406  1.109      elad 	kauth_cred_t cred = nfsd->nd_cr;
   2407   1.54  augustss 	u_int32_t *tl;
   2408   1.54  augustss 	int32_t t1;
   2409  1.126  christos 	char *bpos;
   2410  1.103  christos 	int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1;
   2411   1.23      fvdl 	int v3 = (nfsd->nd_flag & ND_NFSV3);
   2412    1.1       cgd 	char *cp2;
   2413    1.1       cgd 	struct mbuf *mb, *mreq;
   2414   1.23      fvdl 	struct vnode *vp, *dirp = (struct vnode *)0;
   2415   1.23      fvdl 	struct vattr dirfor, diraft;
   2416  1.117      yamt 	nfsrvfh_t nsfh;
   2417    1.1       cgd 	struct nameidata nd;
   2418   1.15   mycroft 	u_quad_t frev;
   2419    1.1       cgd 
   2420  1.117      yamt 	nfsm_srvmtofh(&nsfh);
   2421   1.23      fvdl 	nfsm_srvnamesiz(len);
   2422   1.15   mycroft 	nd.ni_cnd.cn_cred = cred;
   2423   1.15   mycroft 	nd.ni_cnd.cn_nameiop = DELETE;
   2424   1.15   mycroft 	nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF;
   2425  1.117      yamt 	error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos,
   2426  1.125   thorpej 		&dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false);
   2427  1.120       chs 	if (dirp && v3) {
   2428  1.131     pooka 		dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred);
   2429   1.23      fvdl 	}
   2430   1.23      fvdl 	if (error) {
   2431   1.23      fvdl 		nfsm_reply(NFSX_WCCDATA(v3));
   2432   1.23      fvdl 		nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
   2433   1.23      fvdl 		if (dirp)
   2434   1.23      fvdl 			vrele(dirp);
   2435   1.23      fvdl 		return (0);
   2436   1.23      fvdl 	}
   2437    1.1       cgd 	vp = nd.ni_vp;
   2438    1.1       cgd 	if (vp->v_type != VDIR) {
   2439    1.1       cgd 		error = ENOTDIR;
   2440    1.1       cgd 		goto out;
   2441    1.1       cgd 	}
   2442    1.1       cgd 	/*
   2443    1.1       cgd 	 * No rmdir "." please.
   2444    1.1       cgd 	 */
   2445    1.1       cgd 	if (nd.ni_dvp == vp) {
   2446    1.1       cgd 		error = EINVAL;
   2447    1.1       cgd 		goto out;
   2448    1.1       cgd 	}
   2449    1.1       cgd 	/*
   2450    1.1       cgd 	 * The root of a mounted filesystem cannot be deleted.
   2451    1.1       cgd 	 */
   2452  1.130        ad 	if (vp->v_vflag & VV_ROOT)
   2453    1.1       cgd 		error = EBUSY;
   2454    1.1       cgd out:
   2455    1.1       cgd 	if (!error) {
   2456   1.23      fvdl 		nqsrv_getl(nd.ni_dvp, ND_WRITE);
   2457   1.23      fvdl 		nqsrv_getl(vp, ND_WRITE);
   2458   1.15   mycroft 		error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
   2459    1.1       cgd 	} else {
   2460   1.15   mycroft 		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
   2461    1.1       cgd 		if (nd.ni_dvp == nd.ni_vp)
   2462    1.1       cgd 			vrele(nd.ni_dvp);
   2463    1.1       cgd 		else
   2464    1.1       cgd 			vput(nd.ni_dvp);
   2465    1.1       cgd 		vput(vp);
   2466    1.1       cgd 	}
   2467   1.23      fvdl 	if (dirp) {
   2468  1.120       chs 		if (v3) {
   2469  1.131     pooka 			diraft_ret = VOP_GETATTR(dirp, &diraft, cred);
   2470  1.120       chs 		}
   2471   1.23      fvdl 		vrele(dirp);
   2472   1.23      fvdl 	}
   2473   1.23      fvdl 	nfsm_reply(NFSX_WCCDATA(v3));
   2474   1.23      fvdl 	if (v3) {
   2475   1.23      fvdl 		nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
   2476   1.23      fvdl 		return (0);
   2477   1.23      fvdl 	}
   2478    1.1       cgd 	nfsm_srvdone;
   2479    1.1       cgd }
   2480    1.1       cgd 
   2481    1.1       cgd /*
   2482    1.1       cgd  * nfs readdir service
   2483    1.1       cgd  * - mallocs what it thinks is enough to read
   2484   1.98      yamt  *	count rounded up to a multiple of NFS_SRVDIRBLKSIZ <= NFS_MAXREADDIR
   2485    1.1       cgd  * - calls VOP_READDIR()
   2486    1.1       cgd  * - loops around building the reply
   2487    1.1       cgd  *	if the output generated exceeds count break out of loop
   2488    1.1       cgd  *	The nfsm_clget macro is used here so that the reply will be packed
   2489    1.1       cgd  *	tightly in mbuf clusters.
   2490    1.1       cgd  * - it only knows that it has encountered eof when the VOP_READDIR()
   2491    1.1       cgd  *	reads nothing
   2492    1.1       cgd  * - as such one readdir rpc will return eof false although you are there
   2493    1.1       cgd  *	and then the next will return eof
   2494   1.11        ws  * - it trims out records with d_fileno == 0
   2495    1.1       cgd  *	this doesn't matter for Unix clients, but they might confuse clients
   2496    1.1       cgd  *	for other os'.
   2497   1.25       jtk  * - it trims out records with d_type == DT_WHT
   2498   1.25       jtk  *	these cannot be seen through NFS (unless we extend the protocol)
   2499    1.1       cgd  * NB: It is tempting to set eof to true if the VOP_READDIR() reads less
   2500    1.1       cgd  *	than requested, but this may not apply to all filesystems. For
   2501    1.1       cgd  *	example, client NFS does not { although it is never remote mounted
   2502    1.1       cgd  *	anyhow }
   2503   1.23      fvdl  *     The alternate call nfsrv_readdirplus() does lookups as well.
   2504    1.1       cgd  * PS: The NFS protocol spec. does not clarify what the "count" byte
   2505    1.1       cgd  *	argument is a count of.. just name strings and file id's or the
   2506    1.1       cgd  *	entire reply rpc or ...
   2507    1.1       cgd  *	I tried just file name and id sizes and it confused the Sun client,
   2508    1.1       cgd  *	so I am using the full rpc size now. The "paranoia.." comment refers
   2509    1.1       cgd  *	to including the status longwords that are not a part of the dir.
   2510    1.1       cgd  *	"entry" structures, but are in the rpc.
   2511    1.1       cgd  */
   2512   1.98      yamt 
   2513   1.98      yamt #define	NFS_SRVDIRBLKSIZ	1024
   2514   1.98      yamt 
   2515   1.15   mycroft struct flrep {
   2516   1.23      fvdl 	nfsuint64 fl_off;
   2517   1.23      fvdl 	u_int32_t fl_postopok;
   2518   1.23      fvdl 	u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)];
   2519   1.23      fvdl 	u_int32_t fl_fhok;
   2520   1.23      fvdl 	u_int32_t fl_fhsize;
   2521   1.15   mycroft };
   2522   1.15   mycroft 
   2523   1.22  christos int
   2524   1.99  christos nfsrv_readdir(nfsd, slp, lwp, mrq)
   2525   1.23      fvdl 	struct nfsrv_descript *nfsd;
   2526   1.23      fvdl 	struct nfssvc_sock *slp;
   2527   1.99  christos 	struct lwp *lwp;
   2528   1.23      fvdl 	struct mbuf **mrq;
   2529    1.1       cgd {
   2530   1.23      fvdl 	struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
   2531   1.23      fvdl 	struct mbuf *nam = nfsd->nd_nam;
   2532  1.126  christos 	char *dpos = nfsd->nd_dpos;
   2533  1.109      elad 	kauth_cred_t cred = nfsd->nd_cr;
   2534   1.54  augustss 	char *bp, *be;
   2535   1.54  augustss 	struct mbuf *mp;
   2536   1.54  augustss 	struct dirent *dp;
   2537  1.126  christos 	char *cp;
   2538   1.54  augustss 	u_int32_t *tl;
   2539   1.54  augustss 	int32_t t1;
   2540  1.126  christos 	char *bpos;
   2541   1.67      matt 	struct mbuf *mb, *mreq, *mp2;
   2542   1.15   mycroft 	char *cpos, *cend, *cp2, *rbuf;
   2543    1.1       cgd 	struct vnode *vp;
   2544   1.23      fvdl 	struct vattr at;
   2545  1.117      yamt 	nfsrvfh_t nsfh;
   2546    1.1       cgd 	struct uio io;
   2547    1.1       cgd 	struct iovec iv;
   2548   1.23      fvdl 	int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1;
   2549  1.103  christos 	int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, ncookies;
   2550   1.23      fvdl 	int v3 = (nfsd->nd_flag & ND_NFSV3);
   2551   1.23      fvdl 	u_quad_t frev, off, toff, verf;
   2552   1.38      fvdl 	off_t *cookies = NULL, *cookiep;
   2553   1.38      fvdl 	nfsuint64 jar;
   2554   1.15   mycroft 
   2555  1.117      yamt 	nfsm_srvmtofh(&nsfh);
   2556   1.23      fvdl 	if (v3) {
   2557   1.23      fvdl 		nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
   2558   1.48      fair 		toff = fxdr_hyper(tl);
   2559   1.23      fvdl 		tl += 2;
   2560   1.48      fair 		verf = fxdr_hyper(tl);
   2561   1.23      fvdl 		tl += 2;
   2562   1.23      fvdl 	} else {
   2563   1.23      fvdl 		nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
   2564   1.23      fvdl 		toff = fxdr_unsigned(u_quad_t, *tl++);
   2565   1.23      fvdl 	}
   2566   1.23      fvdl 	off = toff;
   2567    1.1       cgd 	cnt = fxdr_unsigned(int, *tl);
   2568   1.98      yamt 	siz = ((cnt + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1));
   2569   1.23      fvdl 	xfer = NFS_SRVMAXDATA(nfsd);
   2570   1.23      fvdl 	if (siz > xfer)
   2571   1.23      fvdl 		siz = xfer;
   2572    1.1       cgd 	fullsiz = siz;
   2573  1.117      yamt 	error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam,
   2574  1.125   thorpej 		 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false);
   2575   1.39      fvdl 	if (!error && vp->v_type != VDIR) {
   2576   1.39      fvdl 		error = ENOTDIR;
   2577   1.39      fvdl 		vput(vp);
   2578   1.39      fvdl 	}
   2579   1.23      fvdl 	if (error) {
   2580   1.23      fvdl 		nfsm_reply(NFSX_UNSIGNED);
   2581   1.23      fvdl 		nfsm_srvpostop_attr(getret, &at);
   2582   1.23      fvdl 		return (0);
   2583   1.23      fvdl 	}
   2584   1.23      fvdl 	nqsrv_getl(vp, ND_READ);
   2585   1.23      fvdl 	if (v3) {
   2586  1.131     pooka 		error = getret = VOP_GETATTR(vp, &at, cred);
   2587   1.23      fvdl #ifdef NFS3_STRICTVERF
   2588   1.23      fvdl 		/*
   2589   1.23      fvdl 		 * XXX This check is too strict for Solaris 2.5 clients.
   2590   1.23      fvdl 		 */
   2591   1.23      fvdl 		if (!error && toff && verf != at.va_filerev)
   2592   1.23      fvdl 			error = NFSERR_BAD_COOKIE;
   2593   1.23      fvdl #endif
   2594   1.23      fvdl 	}
   2595   1.23      fvdl 	if (!error)
   2596   1.99  christos 		error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0);
   2597   1.22  christos 	if (error) {
   2598    1.1       cgd 		vput(vp);
   2599   1.23      fvdl 		nfsm_reply(NFSX_POSTOPATTR(v3));
   2600   1.23      fvdl 		nfsm_srvpostop_attr(getret, &at);
   2601   1.23      fvdl 		return (0);
   2602    1.1       cgd 	}
   2603   1.42      fvdl 	VOP_UNLOCK(vp, 0);
   2604   1.56   thorpej 	rbuf = malloc(siz, M_TEMP, M_WAITOK);
   2605    1.1       cgd again:
   2606    1.1       cgd 	iv.iov_base = rbuf;
   2607    1.1       cgd 	iv.iov_len = fullsiz;
   2608    1.1       cgd 	io.uio_iov = &iv;
   2609    1.1       cgd 	io.uio_iovcnt = 1;
   2610   1.15   mycroft 	io.uio_offset = (off_t)off;
   2611    1.1       cgd 	io.uio_resid = fullsiz;
   2612    1.1       cgd 	io.uio_rw = UIO_READ;
   2613  1.101      yamt 	UIO_SETUP_SYSSPACE(&io);
   2614   1.23      fvdl 	eofflag = 0;
   2615   1.42      fvdl 	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
   2616   1.23      fvdl 
   2617   1.42      fvdl 	error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies);
   2618   1.23      fvdl 
   2619   1.15   mycroft 	off = (off_t)io.uio_offset;
   2620   1.23      fvdl 	if (!cookies && !error)
   2621   1.23      fvdl 		error = NFSERR_PERM;
   2622   1.23      fvdl 	if (v3) {
   2623  1.131     pooka 		getret = VOP_GETATTR(vp, &at, cred);
   2624   1.23      fvdl 		if (!error)
   2625   1.23      fvdl 			error = getret;
   2626   1.23      fvdl 	}
   2627   1.23      fvdl 
   2628   1.42      fvdl 	VOP_UNLOCK(vp, 0);
   2629    1.1       cgd 	if (error) {
   2630    1.1       cgd 		vrele(vp);
   2631  1.126  christos 		free((void *)rbuf, M_TEMP);
   2632   1.23      fvdl 		if (cookies)
   2633  1.126  christos 			free((void *)cookies, M_TEMP);
   2634   1.23      fvdl 		nfsm_reply(NFSX_POSTOPATTR(v3));
   2635   1.23      fvdl 		nfsm_srvpostop_attr(getret, &at);
   2636   1.23      fvdl 		return (0);
   2637    1.1       cgd 	}
   2638    1.1       cgd 	if (io.uio_resid) {
   2639    1.1       cgd 		siz -= io.uio_resid;
   2640    1.1       cgd 
   2641    1.1       cgd 		/*
   2642    1.1       cgd 		 * If nothing read, return eof
   2643    1.1       cgd 		 * rpc reply
   2644    1.1       cgd 		 */
   2645    1.1       cgd 		if (siz == 0) {
   2646    1.1       cgd 			vrele(vp);
   2647   1.23      fvdl 			nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) +
   2648   1.23      fvdl 				2 * NFSX_UNSIGNED);
   2649   1.23      fvdl 			if (v3) {
   2650   1.23      fvdl 				nfsm_srvpostop_attr(getret, &at);
   2651   1.23      fvdl 				nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
   2652   1.48      fair 				txdr_hyper(at.va_filerev, tl);
   2653   1.23      fvdl 				tl += 2;
   2654   1.23      fvdl 			} else
   2655   1.23      fvdl 				nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
   2656    1.1       cgd 			*tl++ = nfs_false;
   2657    1.1       cgd 			*tl = nfs_true;
   2658  1.126  christos 			free((void *)rbuf, M_TEMP);
   2659  1.126  christos 			free((void *)cookies, M_TEMP);
   2660    1.1       cgd 			return (0);
   2661    1.1       cgd 		}
   2662    1.1       cgd 	}
   2663    1.1       cgd 
   2664    1.1       cgd 	/*
   2665    1.1       cgd 	 * Check for degenerate cases of nothing useful read.
   2666    1.1       cgd 	 * If so go try again
   2667    1.1       cgd 	 */
   2668    1.8        ws 	cpos = rbuf;
   2669    1.1       cgd 	cend = rbuf + siz;
   2670   1.23      fvdl 	dp = (struct dirent *)cpos;
   2671   1.23      fvdl 	cookiep = cookies;
   2672   1.23      fvdl 
   2673   1.28      fvdl 	while (cpos < cend && ncookies > 0 &&
   2674   1.28      fvdl 		(dp->d_fileno == 0 || dp->d_type == DT_WHT)) {
   2675   1.23      fvdl 		cpos += dp->d_reclen;
   2676   1.11        ws 		dp = (struct dirent *)cpos;
   2677   1.23      fvdl 		cookiep++;
   2678   1.23      fvdl 		ncookies--;
   2679    1.1       cgd 	}
   2680   1.23      fvdl 	if (cpos >= cend || ncookies == 0) {
   2681   1.23      fvdl 		toff = off;
   2682    1.1       cgd 		siz = fullsiz;
   2683  1.115  christos 		free(cookies, M_TEMP);
   2684  1.124     pooka 		cookies = NULL;
   2685    1.1       cgd 		goto again;
   2686    1.1       cgd 	}
   2687    1.1       cgd 
   2688   1.23      fvdl 	len = 3 * NFSX_UNSIGNED;	/* paranoia, probably can be 0 */
   2689   1.23      fvdl 	nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz);
   2690   1.23      fvdl 	if (v3) {
   2691   1.23      fvdl 		nfsm_srvpostop_attr(getret, &at);
   2692   1.23      fvdl 		nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
   2693   1.48      fair 		txdr_hyper(at.va_filerev, tl);
   2694   1.23      fvdl 	}
   2695   1.15   mycroft 	mp = mp2 = mb;
   2696   1.15   mycroft 	bp = bpos;
   2697   1.15   mycroft 	be = bp + M_TRAILINGSPACE(mp);
   2698   1.15   mycroft 
   2699   1.15   mycroft 	/* Loop through the records and build reply */
   2700   1.23      fvdl 	while (cpos < cend && ncookies > 0) {
   2701   1.25       jtk 		if (dp->d_fileno != 0 && dp->d_type != DT_WHT) {
   2702   1.15   mycroft 			nlen = dp->d_namlen;
   2703   1.15   mycroft 			rem = nfsm_rndup(nlen)-nlen;
   2704   1.23      fvdl 			len += (4 * NFSX_UNSIGNED + nlen + rem);
   2705   1.23      fvdl 			if (v3)
   2706   1.23      fvdl 				len += 2 * NFSX_UNSIGNED;
   2707   1.15   mycroft 			if (len > cnt) {
   2708   1.15   mycroft 				eofflag = 0;
   2709   1.15   mycroft 				break;
   2710   1.15   mycroft 			}
   2711   1.15   mycroft 			/*
   2712   1.15   mycroft 			 * Build the directory record xdr from
   2713   1.15   mycroft 			 * the dirent entry.
   2714   1.15   mycroft 			 */
   2715   1.15   mycroft 			nfsm_clget;
   2716   1.15   mycroft 			*tl = nfs_true;
   2717   1.15   mycroft 			bp += NFSX_UNSIGNED;
   2718   1.23      fvdl 			if (v3) {
   2719   1.23      fvdl 				nfsm_clget;
   2720   1.96      yamt 				*tl = txdr_unsigned(dp->d_fileno >> 32);
   2721   1.23      fvdl 				bp += NFSX_UNSIGNED;
   2722   1.23      fvdl 			}
   2723   1.15   mycroft 			nfsm_clget;
   2724   1.15   mycroft 			*tl = txdr_unsigned(dp->d_fileno);
   2725   1.15   mycroft 			bp += NFSX_UNSIGNED;
   2726   1.15   mycroft 			nfsm_clget;
   2727   1.15   mycroft 			*tl = txdr_unsigned(nlen);
   2728   1.15   mycroft 			bp += NFSX_UNSIGNED;
   2729   1.94     perry 
   2730   1.15   mycroft 			/* And loop around copying the name */
   2731   1.15   mycroft 			xfer = nlen;
   2732   1.15   mycroft 			cp = dp->d_name;
   2733   1.15   mycroft 			while (xfer > 0) {
   2734   1.15   mycroft 				nfsm_clget;
   2735   1.15   mycroft 				if ((bp+xfer) > be)
   2736   1.15   mycroft 					tsiz = be-bp;
   2737   1.15   mycroft 				else
   2738   1.15   mycroft 					tsiz = xfer;
   2739   1.44     perry 				memcpy(bp, cp, tsiz);
   2740   1.15   mycroft 				bp += tsiz;
   2741   1.15   mycroft 				xfer -= tsiz;
   2742   1.15   mycroft 				if (xfer > 0)
   2743   1.15   mycroft 					cp += tsiz;
   2744   1.15   mycroft 			}
   2745   1.23      fvdl 			/* And null pad to an int32_t boundary */
   2746   1.15   mycroft 			for (i = 0; i < rem; i++)
   2747   1.15   mycroft 				*bp++ = '\0';
   2748   1.15   mycroft 			nfsm_clget;
   2749   1.94     perry 
   2750   1.15   mycroft 			/* Finish off the record */
   2751   1.48      fair 			txdr_hyper(*cookiep, &jar);
   2752   1.23      fvdl 			if (v3) {
   2753   1.38      fvdl 				*tl = jar.nfsuquad[0];
   2754   1.23      fvdl 				bp += NFSX_UNSIGNED;
   2755   1.23      fvdl 				nfsm_clget;
   2756   1.23      fvdl 			}
   2757   1.38      fvdl 			*tl = jar.nfsuquad[1];
   2758   1.15   mycroft 			bp += NFSX_UNSIGNED;
   2759   1.15   mycroft 		}
   2760   1.15   mycroft 		cpos += dp->d_reclen;
   2761   1.15   mycroft 		dp = (struct dirent *)cpos;
   2762   1.23      fvdl 		cookiep++;
   2763   1.23      fvdl 		ncookies--;
   2764   1.15   mycroft 	}
   2765    1.1       cgd 	vrele(vp);
   2766   1.15   mycroft 	nfsm_clget;
   2767   1.15   mycroft 	*tl = nfs_false;
   2768   1.15   mycroft 	bp += NFSX_UNSIGNED;
   2769   1.15   mycroft 	nfsm_clget;
   2770   1.15   mycroft 	if (eofflag)
   2771   1.15   mycroft 		*tl = nfs_true;
   2772   1.15   mycroft 	else
   2773   1.15   mycroft 		*tl = nfs_false;
   2774   1.15   mycroft 	bp += NFSX_UNSIGNED;
   2775   1.15   mycroft 	if (mp != mb) {
   2776   1.15   mycroft 		if (bp < be)
   2777  1.126  christos 			mp->m_len = bp - mtod(mp, char *);
   2778   1.15   mycroft 	} else
   2779   1.15   mycroft 		mp->m_len += bp - bpos;
   2780  1.126  christos 	free((void *)rbuf, M_TEMP);
   2781  1.126  christos 	free((void *)cookies, M_TEMP);
   2782   1.15   mycroft 	nfsm_srvdone;
   2783   1.15   mycroft }
   2784   1.15   mycroft 
   2785   1.22  christos int
   2786   1.99  christos nfsrv_readdirplus(nfsd, slp, lwp, mrq)
   2787   1.23      fvdl 	struct nfsrv_descript *nfsd;
   2788   1.23      fvdl 	struct nfssvc_sock *slp;
   2789   1.99  christos 	struct lwp *lwp;
   2790   1.23      fvdl 	struct mbuf **mrq;
   2791   1.15   mycroft {
   2792   1.23      fvdl 	struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
   2793   1.23      fvdl 	struct mbuf *nam = nfsd->nd_nam;
   2794  1.126  christos 	char *dpos = nfsd->nd_dpos;
   2795  1.109      elad 	kauth_cred_t cred = nfsd->nd_cr;
   2796   1.54  augustss 	char *bp, *be;
   2797   1.54  augustss 	struct mbuf *mp;
   2798   1.54  augustss 	struct dirent *dp;
   2799  1.126  christos 	char *cp;
   2800   1.54  augustss 	u_int32_t *tl;
   2801   1.54  augustss 	int32_t t1;
   2802  1.126  christos 	char *bpos;
   2803   1.67      matt 	struct mbuf *mb, *mreq, *mp2;
   2804   1.15   mycroft 	char *cpos, *cend, *cp2, *rbuf;
   2805   1.15   mycroft 	struct vnode *vp, *nvp;
   2806   1.15   mycroft 	struct flrep fl;
   2807  1.117      yamt 	nfsrvfh_t nsfh;
   2808   1.15   mycroft 	struct uio io;
   2809   1.15   mycroft 	struct iovec iv;
   2810   1.23      fvdl 	struct vattr va, at, *vap = &va;
   2811   1.23      fvdl 	struct nfs_fattr *fp;
   2812   1.23      fvdl 	int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1;
   2813  1.103  christos 	int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, dirlen, ncookies;
   2814   1.23      fvdl 	u_quad_t frev, off, toff, verf;
   2815   1.38      fvdl 	off_t *cookies = NULL, *cookiep;
   2816   1.15   mycroft 
   2817  1.117      yamt 	nfsm_srvmtofh(&nsfh);
   2818   1.23      fvdl 	nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
   2819   1.48      fair 	toff = fxdr_hyper(tl);
   2820   1.23      fvdl 	tl += 2;
   2821   1.48      fair 	verf = fxdr_hyper(tl);
   2822   1.23      fvdl 	tl += 2;
   2823   1.23      fvdl 	siz = fxdr_unsigned(int, *tl++);
   2824   1.23      fvdl 	cnt = fxdr_unsigned(int, *tl);
   2825   1.23      fvdl 	off = toff;
   2826   1.98      yamt 	siz = ((siz + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1));
   2827   1.23      fvdl 	xfer = NFS_SRVMAXDATA(nfsd);
   2828   1.23      fvdl 	if (siz > xfer)
   2829   1.23      fvdl 		siz = xfer;
   2830   1.15   mycroft 	fullsiz = siz;
   2831  1.117      yamt 	error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam,
   2832  1.125   thorpej 		 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false);
   2833   1.39      fvdl 	if (!error && vp->v_type != VDIR) {
   2834   1.39      fvdl 		error = ENOTDIR;
   2835   1.39      fvdl 		vput(vp);
   2836   1.39      fvdl 	}
   2837   1.23      fvdl 	if (error) {
   2838   1.23      fvdl 		nfsm_reply(NFSX_UNSIGNED);
   2839   1.23      fvdl 		nfsm_srvpostop_attr(getret, &at);
   2840   1.23      fvdl 		return (0);
   2841   1.23      fvdl 	}
   2842  1.131     pooka 	error = getret = VOP_GETATTR(vp, &at, cred);
   2843   1.23      fvdl #ifdef NFS3_STRICTVERF
   2844   1.23      fvdl 	/*
   2845   1.23      fvdl 	 * XXX This check is too strict for Solaris 2.5 clients.
   2846   1.23      fvdl 	 */
   2847   1.23      fvdl 	if (!error && toff && verf != at.va_filerev)
   2848   1.23      fvdl 		error = NFSERR_BAD_COOKIE;
   2849   1.23      fvdl #endif
   2850   1.23      fvdl 	if (!error) {
   2851   1.23      fvdl 		nqsrv_getl(vp, ND_READ);
   2852   1.99  christos 		error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0);
   2853   1.23      fvdl 	}
   2854   1.22  christos 	if (error) {
   2855   1.15   mycroft 		vput(vp);
   2856   1.23      fvdl 		nfsm_reply(NFSX_V3POSTOPATTR);
   2857   1.23      fvdl 		nfsm_srvpostop_attr(getret, &at);
   2858   1.23      fvdl 		return (0);
   2859   1.15   mycroft 	}
   2860   1.42      fvdl 	VOP_UNLOCK(vp, 0);
   2861   1.23      fvdl 
   2862   1.56   thorpej 	rbuf = malloc(siz, M_TEMP, M_WAITOK);
   2863   1.15   mycroft again:
   2864   1.15   mycroft 	iv.iov_base = rbuf;
   2865   1.15   mycroft 	iv.iov_len = fullsiz;
   2866   1.15   mycroft 	io.uio_iov = &iv;
   2867   1.15   mycroft 	io.uio_iovcnt = 1;
   2868   1.15   mycroft 	io.uio_offset = (off_t)off;
   2869   1.15   mycroft 	io.uio_resid = fullsiz;
   2870   1.15   mycroft 	io.uio_rw = UIO_READ;
   2871  1.101      yamt 	UIO_SETUP_SYSSPACE(&io);
   2872   1.23      fvdl 	eofflag = 0;
   2873   1.23      fvdl 
   2874   1.42      fvdl 	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
   2875   1.42      fvdl 
   2876   1.42      fvdl 	error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies);
   2877   1.23      fvdl 
   2878   1.23      fvdl 	off = (u_quad_t)io.uio_offset;
   2879  1.131     pooka 	getret = VOP_GETATTR(vp, &at, cred);
   2880   1.23      fvdl 
   2881   1.42      fvdl 	VOP_UNLOCK(vp, 0);
   2882   1.36      fvdl 
   2883   1.36      fvdl 	/*
   2884   1.36      fvdl 	 * If the VGET operation doesn't work for this filesystem,
   2885   1.36      fvdl 	 * we can't support readdirplus. Returning NOTSUPP should
   2886   1.36      fvdl 	 * make clients fall back to plain readdir.
   2887   1.36      fvdl 	 * There's no need to check for VPTOFH as well, we wouldn't
   2888   1.36      fvdl 	 * even be here otherwise.
   2889   1.36      fvdl 	 */
   2890   1.36      fvdl 	if (!getret) {
   2891   1.78   thorpej 		if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp)))
   2892   1.36      fvdl 			getret = (getret == EOPNOTSUPP) ?
   2893   1.36      fvdl 				NFSERR_NOTSUPP : NFSERR_IO;
   2894   1.36      fvdl 		else
   2895   1.36      fvdl 			vput(nvp);
   2896   1.36      fvdl 	}
   2897   1.36      fvdl 
   2898   1.23      fvdl 	if (!cookies && !error)
   2899   1.23      fvdl 		error = NFSERR_PERM;
   2900   1.23      fvdl 	if (!error)
   2901   1.23      fvdl 		error = getret;
   2902   1.15   mycroft 	if (error) {
   2903   1.15   mycroft 		vrele(vp);
   2904   1.23      fvdl 		if (cookies)
   2905  1.126  christos 			free((void *)cookies, M_TEMP);
   2906  1.126  christos 		free((void *)rbuf, M_TEMP);
   2907   1.23      fvdl 		nfsm_reply(NFSX_V3POSTOPATTR);
   2908   1.23      fvdl 		nfsm_srvpostop_attr(getret, &at);
   2909   1.23      fvdl 		return (0);
   2910   1.15   mycroft 	}
   2911   1.15   mycroft 	if (io.uio_resid) {
   2912   1.15   mycroft 		siz -= io.uio_resid;
   2913   1.15   mycroft 
   2914   1.15   mycroft 		/*
   2915   1.15   mycroft 		 * If nothing read, return eof
   2916   1.15   mycroft 		 * rpc reply
   2917   1.15   mycroft 		 */
   2918   1.15   mycroft 		if (siz == 0) {
   2919   1.15   mycroft 			vrele(vp);
   2920   1.23      fvdl 			nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF +
   2921   1.23      fvdl 				2 * NFSX_UNSIGNED);
   2922   1.23      fvdl 			nfsm_srvpostop_attr(getret, &at);
   2923   1.23      fvdl 			nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
   2924   1.48      fair 			txdr_hyper(at.va_filerev, tl);
   2925   1.23      fvdl 			tl += 2;
   2926   1.15   mycroft 			*tl++ = nfs_false;
   2927   1.15   mycroft 			*tl = nfs_true;
   2928  1.126  christos 			free((void *)cookies, M_TEMP);
   2929  1.126  christos 			free((void *)rbuf, M_TEMP);
   2930   1.15   mycroft 			return (0);
   2931   1.15   mycroft 		}
   2932   1.15   mycroft 	}
   2933   1.15   mycroft 
   2934   1.15   mycroft 	/*
   2935   1.15   mycroft 	 * Check for degenerate cases of nothing useful read.
   2936   1.15   mycroft 	 * If so go try again
   2937   1.15   mycroft 	 */
   2938   1.15   mycroft 	cpos = rbuf;
   2939   1.15   mycroft 	cend = rbuf + siz;
   2940   1.23      fvdl 	dp = (struct dirent *)cpos;
   2941   1.23      fvdl 	cookiep = cookies;
   2942   1.23      fvdl 
   2943   1.29      fvdl 	while (cpos < cend && ncookies > 0 &&
   2944   1.29      fvdl 		(dp->d_fileno == 0 || dp->d_type == DT_WHT)) {
   2945   1.23      fvdl 		cpos += dp->d_reclen;
   2946   1.15   mycroft 		dp = (struct dirent *)cpos;
   2947   1.23      fvdl 		cookiep++;
   2948   1.23      fvdl 		ncookies--;
   2949   1.15   mycroft 	}
   2950   1.23      fvdl 	if (cpos >= cend || ncookies == 0) {
   2951   1.23      fvdl 		toff = off;
   2952   1.15   mycroft 		siz = fullsiz;
   2953  1.115  christos 		free(cookies, M_TEMP);
   2954  1.124     pooka 		cookies = NULL;
   2955   1.15   mycroft 		goto again;
   2956   1.15   mycroft 	}
   2957   1.15   mycroft 
   2958   1.23      fvdl 	dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED;
   2959   1.23      fvdl 	nfsm_reply(cnt);
   2960   1.23      fvdl 	nfsm_srvpostop_attr(getret, &at);
   2961   1.23      fvdl 	nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
   2962   1.48      fair 	txdr_hyper(at.va_filerev, tl);
   2963   1.15   mycroft 	mp = mp2 = mb;
   2964   1.15   mycroft 	bp = bpos;
   2965   1.15   mycroft 	be = bp + M_TRAILINGSPACE(mp);
   2966    1.1       cgd 
   2967    1.1       cgd 	/* Loop through the records and build reply */
   2968   1.23      fvdl 	while (cpos < cend && ncookies > 0) {
   2969   1.25       jtk 		if (dp->d_fileno != 0 && dp->d_type != DT_WHT) {
   2970  1.117      yamt 			nfsrvfh_t nnsfh;
   2971  1.117      yamt 
   2972    1.1       cgd 			nlen = dp->d_namlen;
   2973    1.1       cgd 			rem = nfsm_rndup(nlen)-nlen;
   2974   1.94     perry 
   2975    1.1       cgd 			/*
   2976   1.15   mycroft 			 * For readdir_and_lookup get the vnode using
   2977   1.15   mycroft 			 * the file number.
   2978    1.1       cgd 			 */
   2979   1.78   thorpej 			if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp))
   2980   1.15   mycroft 				goto invalid;
   2981  1.125   thorpej 			if (nfsrv_composefh(nvp, &nnsfh, true)) {
   2982   1.15   mycroft 				vput(nvp);
   2983   1.15   mycroft 				goto invalid;
   2984   1.15   mycroft 			}
   2985  1.131     pooka 			if (VOP_GETATTR(nvp, vap, cred)) {
   2986   1.15   mycroft 				vput(nvp);
   2987   1.15   mycroft 				goto invalid;
   2988   1.15   mycroft 			}
   2989   1.15   mycroft 			vput(nvp);
   2990   1.23      fvdl 
   2991   1.23      fvdl 			/*
   2992   1.23      fvdl 			 * If either the dircount or maxcount will be
   2993   1.23      fvdl 			 * exceeded, get out now. Both of these lengths
   2994   1.23      fvdl 			 * are calculated conservatively, including all
   2995   1.23      fvdl 			 * XDR overheads.
   2996   1.23      fvdl 			 */
   2997   1.52      fvdl 			len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH +
   2998   1.23      fvdl 				NFSX_V3POSTOPATTR);
   2999   1.23      fvdl 			dirlen += (6 * NFSX_UNSIGNED + nlen + rem);
   3000   1.23      fvdl 			if (len > cnt || dirlen > fullsiz) {
   3001    1.1       cgd 				eofflag = 0;
   3002    1.1       cgd 				break;
   3003    1.1       cgd 			}
   3004   1.23      fvdl 
   3005   1.15   mycroft 			/*
   3006   1.15   mycroft 			 * Build the directory record xdr from
   3007   1.15   mycroft 			 * the dirent entry.
   3008   1.15   mycroft 			 */
   3009   1.23      fvdl 			fp = (struct nfs_fattr *)&fl.fl_fattr;
   3010   1.23      fvdl 			nfsm_srvfillattr(vap, fp);
   3011   1.23      fvdl 			fl.fl_fhsize = txdr_unsigned(NFSX_V3FH);
   3012   1.23      fvdl 			fl.fl_fhok = nfs_true;
   3013   1.23      fvdl 			fl.fl_postopok = nfs_true;
   3014   1.48      fair 			txdr_hyper(*cookiep, fl.fl_off.nfsuquad);
   3015   1.23      fvdl 
   3016    1.1       cgd 			nfsm_clget;
   3017    1.1       cgd 			*tl = nfs_true;
   3018    1.1       cgd 			bp += NFSX_UNSIGNED;
   3019   1.23      fvdl 			nfsm_clget;
   3020   1.96      yamt 			*tl = txdr_unsigned(dp->d_fileno >> 32);
   3021   1.23      fvdl 			bp += NFSX_UNSIGNED;
   3022    1.1       cgd 			nfsm_clget;
   3023   1.11        ws 			*tl = txdr_unsigned(dp->d_fileno);
   3024    1.1       cgd 			bp += NFSX_UNSIGNED;
   3025    1.1       cgd 			nfsm_clget;
   3026    1.1       cgd 			*tl = txdr_unsigned(nlen);
   3027    1.1       cgd 			bp += NFSX_UNSIGNED;
   3028   1.94     perry 
   3029   1.15   mycroft 			/* And loop around copying the name */
   3030    1.1       cgd 			xfer = nlen;
   3031    1.1       cgd 			cp = dp->d_name;
   3032    1.1       cgd 			while (xfer > 0) {
   3033    1.1       cgd 				nfsm_clget;
   3034   1.23      fvdl 				if ((bp + xfer) > be)
   3035   1.23      fvdl 					tsiz = be - bp;
   3036    1.1       cgd 				else
   3037    1.1       cgd 					tsiz = xfer;
   3038   1.44     perry 				memcpy(bp, cp, tsiz);
   3039    1.1       cgd 				bp += tsiz;
   3040    1.1       cgd 				xfer -= tsiz;
   3041    1.1       cgd 				if (xfer > 0)
   3042    1.1       cgd 					cp += tsiz;
   3043    1.1       cgd 			}
   3044   1.23      fvdl 			/* And null pad to an int32_t boundary */
   3045    1.1       cgd 			for (i = 0; i < rem; i++)
   3046    1.1       cgd 				*bp++ = '\0';
   3047   1.94     perry 
   3048   1.23      fvdl 			/*
   3049   1.23      fvdl 			 * Now copy the flrep structure out.
   3050   1.23      fvdl 			 */
   3051  1.117      yamt 			xfer = sizeof(struct flrep);
   3052  1.126  christos 			cp = (void *)&fl;
   3053   1.23      fvdl 			while (xfer > 0) {
   3054   1.23      fvdl 				nfsm_clget;
   3055   1.23      fvdl 				if ((bp + xfer) > be)
   3056   1.23      fvdl 					tsiz = be - bp;
   3057   1.23      fvdl 				else
   3058   1.23      fvdl 					tsiz = xfer;
   3059   1.44     perry 				memcpy(bp, cp, tsiz);
   3060   1.23      fvdl 				bp += tsiz;
   3061   1.23      fvdl 				xfer -= tsiz;
   3062   1.23      fvdl 				if (xfer > 0)
   3063   1.23      fvdl 					cp += tsiz;
   3064   1.23      fvdl 			}
   3065  1.117      yamt 
   3066  1.117      yamt 			/*
   3067  1.117      yamt 			 * ... and filehandle.
   3068  1.117      yamt 			 */
   3069  1.117      yamt 			xfer = NFSRVFH_SIZE(&nnsfh);
   3070  1.117      yamt 			cp = NFSRVFH_DATA(&nnsfh);
   3071  1.117      yamt 			while (xfer > 0) {
   3072  1.117      yamt 				nfsm_clget;
   3073  1.117      yamt 				if ((bp + xfer) > be)
   3074  1.117      yamt 					tsiz = be - bp;
   3075  1.117      yamt 				else
   3076  1.117      yamt 					tsiz = xfer;
   3077  1.117      yamt 				memcpy(bp, cp, tsiz);
   3078  1.117      yamt 				bp += tsiz;
   3079  1.117      yamt 				xfer -= tsiz;
   3080  1.117      yamt 				if (xfer > 0)
   3081  1.117      yamt 					cp += tsiz;
   3082  1.117      yamt 			}
   3083    1.8        ws 		}
   3084   1.15   mycroft invalid:
   3085    1.1       cgd 		cpos += dp->d_reclen;
   3086   1.11        ws 		dp = (struct dirent *)cpos;
   3087   1.23      fvdl 		cookiep++;
   3088   1.23      fvdl 		ncookies--;
   3089    1.1       cgd 	}
   3090   1.15   mycroft 	vrele(vp);
   3091    1.1       cgd 	nfsm_clget;
   3092    1.1       cgd 	*tl = nfs_false;
   3093    1.1       cgd 	bp += NFSX_UNSIGNED;
   3094    1.1       cgd 	nfsm_clget;
   3095    1.1       cgd 	if (eofflag)
   3096    1.1       cgd 		*tl = nfs_true;
   3097    1.1       cgd 	else
   3098    1.1       cgd 		*tl = nfs_false;
   3099    1.1       cgd 	bp += NFSX_UNSIGNED;
   3100   1.15   mycroft 	if (mp != mb) {
   3101   1.15   mycroft 		if (bp < be)
   3102  1.126  christos 			mp->m_len = bp - mtod(mp, char *);
   3103   1.15   mycroft 	} else
   3104   1.15   mycroft 		mp->m_len += bp - bpos;
   3105  1.126  christos 	free((void *)cookies, M_TEMP);
   3106  1.126  christos 	free((void *)rbuf, M_TEMP);
   3107   1.23      fvdl 	nfsm_srvdone;
   3108   1.23      fvdl }
   3109   1.23      fvdl 
   3110   1.23      fvdl /*
   3111   1.23      fvdl  * nfs commit service
   3112   1.23      fvdl  */
   3113   1.23      fvdl int
   3114   1.99  christos nfsrv_commit(nfsd, slp, lwp, mrq)
   3115   1.23      fvdl 	struct nfsrv_descript *nfsd;
   3116   1.23      fvdl 	struct nfssvc_sock *slp;
   3117   1.99  christos 	struct lwp *lwp;
   3118   1.23      fvdl 	struct mbuf **mrq;
   3119   1.23      fvdl {
   3120   1.23      fvdl 	struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
   3121   1.23      fvdl 	struct mbuf *nam = nfsd->nd_nam;
   3122  1.126  christos 	char *dpos = nfsd->nd_dpos;
   3123  1.109      elad 	kauth_cred_t cred = nfsd->nd_cr;
   3124   1.23      fvdl 	struct vattr bfor, aft;
   3125   1.23      fvdl 	struct vnode *vp;
   3126  1.117      yamt 	nfsrvfh_t nsfh;
   3127   1.54  augustss 	u_int32_t *tl;
   3128   1.54  augustss 	int32_t t1;
   3129  1.126  christos 	char *bpos;
   3130  1.103  christos 	int error = 0, rdonly, for_ret = 1, aft_ret = 1, cache = 0;
   3131   1.93      yamt 	uint32_t cnt;
   3132   1.23      fvdl 	char *cp2;
   3133   1.67      matt 	struct mbuf *mb, *mreq;
   3134   1.65    bouyer 	u_quad_t frev, off, end;
   3135   1.23      fvdl 
   3136  1.117      yamt 	nfsm_srvmtofh(&nsfh);
   3137   1.23      fvdl 	nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
   3138   1.23      fvdl 
   3139   1.48      fair 	off = fxdr_hyper(tl);
   3140   1.23      fvdl 	tl += 2;
   3141   1.93      yamt 	cnt = fxdr_unsigned(uint32_t, *tl);
   3142  1.117      yamt 	error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam,
   3143  1.125   thorpej 		 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false);
   3144   1.23      fvdl 	if (error) {
   3145   1.23      fvdl 		nfsm_reply(2 * NFSX_UNSIGNED);
   3146   1.23      fvdl 		nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft);
   3147   1.23      fvdl 		return (0);
   3148   1.23      fvdl 	}
   3149  1.131     pooka 	for_ret = VOP_GETATTR(vp, &bfor, cred);
   3150   1.65    bouyer 	end = (cnt > 0) ? off + cnt : vp->v_size;
   3151   1.65    bouyer 	if (end < off || end > vp->v_size)
   3152   1.65    bouyer 		end = vp->v_size;
   3153   1.80    bouyer 	if (off < vp->v_size)
   3154  1.131     pooka 		error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, end);
   3155   1.80    bouyer 	/* else error == 0, from nfsrv_fhtovp() */
   3156  1.131     pooka 	aft_ret = VOP_GETATTR(vp, &aft, cred);
   3157   1.23      fvdl 	vput(vp);
   3158   1.23      fvdl 	nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF);
   3159   1.23      fvdl 	nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft);
   3160   1.23      fvdl 	if (!error) {
   3161   1.23      fvdl 		nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF);
   3162   1.23      fvdl 		*tl++ = txdr_unsigned(boottime.tv_sec);
   3163   1.23      fvdl 		*tl = txdr_unsigned(boottime.tv_usec);
   3164   1.82   hannken 	} else {
   3165   1.23      fvdl 		return (0);
   3166   1.82   hannken 	}
   3167    1.1       cgd 	nfsm_srvdone;
   3168    1.1       cgd }
   3169    1.1       cgd 
   3170    1.1       cgd /*
   3171    1.1       cgd  * nfs statfs service
   3172    1.1       cgd  */
   3173   1.22  christos int
   3174   1.99  christos nfsrv_statfs(nfsd, slp, lwp, mrq)
   3175   1.23      fvdl 	struct nfsrv_descript *nfsd;
   3176   1.23      fvdl 	struct nfssvc_sock *slp;
   3177   1.99  christos 	struct lwp *lwp;
   3178   1.23      fvdl 	struct mbuf **mrq;
   3179    1.1       cgd {
   3180   1.23      fvdl 	struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
   3181   1.23      fvdl 	struct mbuf *nam = nfsd->nd_nam;
   3182  1.126  christos 	char *dpos = nfsd->nd_dpos;
   3183  1.109      elad 	kauth_cred_t cred = nfsd->nd_cr;
   3184  1.111  christos 	struct statvfs *sf = NULL;
   3185   1.54  augustss 	struct nfs_statfs *sfp;
   3186   1.54  augustss 	u_int32_t *tl;
   3187   1.54  augustss 	int32_t t1;
   3188  1.126  christos 	char *bpos;
   3189  1.103  christos 	int error = 0, rdonly, cache = 0, getret = 1;
   3190   1.23      fvdl 	int v3 = (nfsd->nd_flag & ND_NFSV3);
   3191    1.1       cgd 	char *cp2;
   3192   1.67      matt 	struct mbuf *mb, *mreq;
   3193    1.1       cgd 	struct vnode *vp;
   3194   1.23      fvdl 	struct vattr at;
   3195  1.117      yamt 	nfsrvfh_t nsfh;
   3196   1.23      fvdl 	u_quad_t frev, tval;
   3197    1.1       cgd 
   3198  1.117      yamt 	nfsm_srvmtofh(&nsfh);
   3199  1.117      yamt 	error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam,
   3200  1.125   thorpej 		 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false);
   3201   1.23      fvdl 	if (error) {
   3202   1.23      fvdl 		nfsm_reply(NFSX_UNSIGNED);
   3203   1.23      fvdl 		nfsm_srvpostop_attr(getret, &at);
   3204   1.23      fvdl 		return (0);
   3205   1.23      fvdl 	}
   3206  1.111  christos 	sf = malloc(sizeof(*sf), M_TEMP, M_WAITOK);
   3207  1.131     pooka 	error = VFS_STATVFS(vp->v_mount, sf);
   3208  1.131     pooka 	getret = VOP_GETATTR(vp, &at, cred);
   3209    1.1       cgd 	vput(vp);
   3210   1.23      fvdl 	nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3));
   3211   1.23      fvdl 	if (v3)
   3212   1.23      fvdl 		nfsm_srvpostop_attr(getret, &at);
   3213  1.111  christos 	if (error) {
   3214  1.111  christos 		free(sf, M_TEMP);
   3215   1.23      fvdl 		return (0);
   3216  1.111  christos 	}
   3217   1.23      fvdl 	nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3));
   3218   1.23      fvdl 	if (v3) {
   3219   1.88  christos 		tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_frsize);
   3220   1.48      fair 		txdr_hyper(tval, &sfp->sf_tbytes);
   3221   1.88  christos 		tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_frsize);
   3222   1.48      fair 		txdr_hyper(tval, &sfp->sf_fbytes);
   3223   1.88  christos 		tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_frsize);
   3224   1.48      fair 		txdr_hyper(tval, &sfp->sf_abytes);
   3225   1.47   mycroft 		tval = (u_quad_t)sf->f_files;
   3226   1.48      fair 		txdr_hyper(tval, &sfp->sf_tfiles);
   3227   1.47   mycroft 		tval = (u_quad_t)sf->f_ffree;
   3228   1.48      fair 		txdr_hyper(tval, &sfp->sf_ffiles);
   3229   1.48      fair 		txdr_hyper(tval, &sfp->sf_afiles);
   3230   1.23      fvdl 		sfp->sf_invarsec = 0;
   3231   1.23      fvdl 	} else {
   3232   1.23      fvdl 		sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA);
   3233   1.88  christos 		sfp->sf_bsize = txdr_unsigned(sf->f_frsize);
   3234   1.23      fvdl 		sfp->sf_blocks = txdr_unsigned(sf->f_blocks);
   3235   1.23      fvdl 		sfp->sf_bfree = txdr_unsigned(sf->f_bfree);
   3236   1.23      fvdl 		sfp->sf_bavail = txdr_unsigned(sf->f_bavail);
   3237   1.23      fvdl 	}
   3238  1.111  christos nfsmout:
   3239  1.111  christos 	if (sf)
   3240  1.111  christos 	    free(sf, M_TEMP);
   3241  1.111  christos 	return error;
   3242   1.23      fvdl }
   3243   1.23      fvdl 
   3244   1.23      fvdl /*
   3245   1.23      fvdl  * nfs fsinfo service
   3246   1.23      fvdl  */
   3247   1.23      fvdl int
   3248   1.99  christos nfsrv_fsinfo(nfsd, slp, lwp, mrq)
   3249   1.23      fvdl 	struct nfsrv_descript *nfsd;
   3250   1.23      fvdl 	struct nfssvc_sock *slp;
   3251   1.99  christos 	struct lwp *lwp;
   3252   1.23      fvdl 	struct mbuf **mrq;
   3253   1.23      fvdl {
   3254   1.23      fvdl 	struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
   3255   1.23      fvdl 	struct mbuf *nam = nfsd->nd_nam;
   3256  1.126  christos 	char *dpos = nfsd->nd_dpos;
   3257  1.109      elad 	kauth_cred_t cred = nfsd->nd_cr;
   3258   1.54  augustss 	u_int32_t *tl;
   3259   1.54  augustss 	struct nfsv3_fsinfo *sip;
   3260   1.54  augustss 	int32_t t1;
   3261  1.126  christos 	char *bpos;
   3262  1.103  christos 	int error = 0, rdonly, cache = 0, getret = 1;
   3263   1.69      yamt 	uint32_t maxdata;
   3264   1.23      fvdl 	char *cp2;
   3265   1.67      matt 	struct mbuf *mb, *mreq;
   3266   1.23      fvdl 	struct vnode *vp;
   3267   1.23      fvdl 	struct vattr at;
   3268  1.117      yamt 	nfsrvfh_t nsfh;
   3269   1.37      fvdl 	u_quad_t frev, maxfsize;
   3270  1.111  christos 	struct statvfs *sb;
   3271   1.23      fvdl 
   3272  1.117      yamt 	nfsm_srvmtofh(&nsfh);
   3273  1.117      yamt 	error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam,
   3274  1.125   thorpej 		 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false);
   3275   1.23      fvdl 	if (error) {
   3276   1.23      fvdl 		nfsm_reply(NFSX_UNSIGNED);
   3277   1.23      fvdl 		nfsm_srvpostop_attr(getret, &at);
   3278   1.23      fvdl 		return (0);
   3279   1.15   mycroft 	}
   3280   1.37      fvdl 
   3281   1.37      fvdl 	/* XXX Try to make a guess on the max file size. */
   3282  1.111  christos 	sb = malloc(sizeof(*sb), M_TEMP, M_WAITOK);
   3283  1.131     pooka 	VFS_STATVFS(vp->v_mount, sb);
   3284  1.111  christos 	maxfsize = (u_quad_t)0x80000000 * sb->f_frsize - 1;
   3285  1.111  christos 	free(sb, M_TEMP);
   3286   1.37      fvdl 
   3287  1.131     pooka 	getret = VOP_GETATTR(vp, &at, cred);
   3288   1.23      fvdl 	vput(vp);
   3289   1.23      fvdl 	nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO);
   3290   1.23      fvdl 	nfsm_srvpostop_attr(getret, &at);
   3291   1.23      fvdl 	nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO);
   3292   1.23      fvdl 
   3293   1.23      fvdl 	/*
   3294   1.23      fvdl 	 * XXX
   3295   1.23      fvdl 	 * There should be file system VFS OP(s) to get this information.
   3296   1.23      fvdl 	 * For now, assume ufs.
   3297   1.23      fvdl 	 */
   3298   1.23      fvdl 	if (slp->ns_so->so_type == SOCK_DGRAM)
   3299   1.69      yamt 		maxdata = NFS_MAXDGRAMDATA;
   3300   1.23      fvdl 	else
   3301   1.69      yamt 		maxdata = NFS_MAXDATA;
   3302   1.69      yamt 	sip->fs_rtmax = txdr_unsigned(maxdata);
   3303   1.69      yamt 	sip->fs_rtpref = txdr_unsigned(maxdata);
   3304   1.23      fvdl 	sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE);
   3305   1.69      yamt 	sip->fs_wtmax = txdr_unsigned(maxdata);
   3306   1.69      yamt 	sip->fs_wtpref = txdr_unsigned(maxdata);
   3307   1.23      fvdl 	sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE);
   3308   1.69      yamt 	sip->fs_dtpref = txdr_unsigned(maxdata);
   3309   1.48      fair 	txdr_hyper(maxfsize, &sip->fs_maxfilesize);
   3310   1.23      fvdl 	sip->fs_timedelta.nfsv3_sec = 0;
   3311   1.23      fvdl 	sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1);
   3312   1.23      fvdl 	sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK |
   3313   1.23      fvdl 		NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS |
   3314   1.23      fvdl 		NFSV3FSINFO_CANSETTIME);
   3315   1.23      fvdl 	nfsm_srvdone;
   3316   1.23      fvdl }
   3317   1.23      fvdl 
   3318   1.23      fvdl /*
   3319   1.23      fvdl  * nfs pathconf service
   3320   1.23      fvdl  */
   3321   1.23      fvdl int
   3322   1.99  christos nfsrv_pathconf(nfsd, slp, lwp, mrq)
   3323   1.23      fvdl 	struct nfsrv_descript *nfsd;
   3324   1.23      fvdl 	struct nfssvc_sock *slp;
   3325   1.99  christos 	struct lwp *lwp;
   3326   1.23      fvdl 	struct mbuf **mrq;
   3327   1.23      fvdl {
   3328   1.23      fvdl 	struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
   3329   1.23      fvdl 	struct mbuf *nam = nfsd->nd_nam;
   3330  1.126  christos 	char *dpos = nfsd->nd_dpos;
   3331  1.109      elad 	kauth_cred_t cred = nfsd->nd_cr;
   3332   1.54  augustss 	u_int32_t *tl;
   3333   1.54  augustss 	struct nfsv3_pathconf *pc;
   3334   1.54  augustss 	int32_t t1;
   3335  1.126  christos 	char *bpos;
   3336  1.103  christos 	int error = 0, rdonly, cache = 0, getret = 1;
   3337   1.24       cgd 	register_t linkmax, namemax, chownres, notrunc;
   3338   1.23      fvdl 	char *cp2;
   3339   1.67      matt 	struct mbuf *mb, *mreq;
   3340   1.23      fvdl 	struct vnode *vp;
   3341   1.23      fvdl 	struct vattr at;
   3342  1.117      yamt 	nfsrvfh_t nsfh;
   3343   1.23      fvdl 	u_quad_t frev;
   3344   1.23      fvdl 
   3345  1.117      yamt 	nfsm_srvmtofh(&nsfh);
   3346  1.117      yamt 	error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam,
   3347  1.125   thorpej 		 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false);
   3348   1.23      fvdl 	if (error) {
   3349   1.23      fvdl 		nfsm_reply(NFSX_UNSIGNED);
   3350   1.23      fvdl 		nfsm_srvpostop_attr(getret, &at);
   3351   1.23      fvdl 		return (0);
   3352   1.23      fvdl 	}
   3353   1.23      fvdl 	error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax);
   3354   1.23      fvdl 	if (!error)
   3355   1.23      fvdl 		error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax);
   3356   1.23      fvdl 	if (!error)
   3357   1.23      fvdl 		error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres);
   3358   1.23      fvdl 	if (!error)
   3359   1.23      fvdl 		error = VOP_PATHCONF(vp, _PC_NO_TRUNC, &notrunc);
   3360  1.131     pooka 	getret = VOP_GETATTR(vp, &at, cred);
   3361   1.23      fvdl 	vput(vp);
   3362   1.23      fvdl 	nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF);
   3363   1.23      fvdl 	nfsm_srvpostop_attr(getret, &at);
   3364   1.23      fvdl 	if (error)
   3365   1.23      fvdl 		return (0);
   3366   1.23      fvdl 	nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF);
   3367   1.23      fvdl 
   3368   1.23      fvdl 	pc->pc_linkmax = txdr_unsigned(linkmax);
   3369   1.23      fvdl 	pc->pc_namemax = txdr_unsigned(namemax);
   3370   1.23      fvdl 	pc->pc_notrunc = txdr_unsigned(notrunc);
   3371   1.23      fvdl 	pc->pc_chownrestricted = txdr_unsigned(chownres);
   3372   1.23      fvdl 
   3373   1.23      fvdl 	/*
   3374   1.23      fvdl 	 * These should probably be supported by VOP_PATHCONF(), but
   3375   1.23      fvdl 	 * until msdosfs is exportable (why would you want to?), the
   3376   1.23      fvdl 	 * Unix defaults should be ok.
   3377   1.23      fvdl 	 */
   3378   1.23      fvdl 	pc->pc_caseinsensitive = nfs_false;
   3379   1.23      fvdl 	pc->pc_casepreserving = nfs_true;
   3380    1.1       cgd 	nfsm_srvdone;
   3381    1.1       cgd }
   3382    1.1       cgd 
   3383    1.1       cgd /*
   3384    1.1       cgd  * Null operation, used by clients to ping server
   3385    1.1       cgd  */
   3386    1.1       cgd /* ARGSUSED */
   3387   1.22  christos int
   3388  1.119      yamt nfsrv_null(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
   3389  1.119      yamt     struct lwp *lwp, struct mbuf **mrq)
   3390    1.1       cgd {
   3391   1.23      fvdl 	struct mbuf *mrep = nfsd->nd_mrep;
   3392  1.126  christos 	char *bpos;
   3393   1.23      fvdl 	int error = NFSERR_RETVOID, cache = 0;
   3394    1.1       cgd 	struct mbuf *mb, *mreq;
   3395   1.15   mycroft 	u_quad_t frev;
   3396    1.1       cgd 
   3397    1.1       cgd 	nfsm_reply(0);
   3398   1.23      fvdl 	return (0);
   3399    1.1       cgd }
   3400    1.1       cgd 
   3401    1.1       cgd /*
   3402    1.1       cgd  * No operation, used for obsolete procedures
   3403    1.1       cgd  */
   3404    1.1       cgd /* ARGSUSED */
   3405   1.22  christos int
   3406  1.119      yamt nfsrv_noop(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
   3407  1.119      yamt     struct lwp *lwp, struct mbuf **mrq)
   3408    1.1       cgd {
   3409   1.23      fvdl 	struct mbuf *mrep = nfsd->nd_mrep;
   3410  1.126  christos 	char *bpos;
   3411   1.22  christos 	int error, cache = 0;
   3412    1.1       cgd 	struct mbuf *mb, *mreq;
   3413   1.15   mycroft 	u_quad_t frev;
   3414    1.1       cgd 
   3415   1.15   mycroft 	if (nfsd->nd_repstat)
   3416   1.15   mycroft 		error = nfsd->nd_repstat;
   3417    1.2       cgd 	else
   3418    1.2       cgd 		error = EPROCUNAVAIL;
   3419    1.1       cgd 	nfsm_reply(0);
   3420   1.23      fvdl 	return (0);
   3421    1.1       cgd }
   3422    1.1       cgd 
   3423    1.1       cgd /*
   3424    1.1       cgd  * Perform access checking for vnodes obtained from file handles that would
   3425    1.1       cgd  * refer to files already opened by a Unix client. You cannot just use
   3426    1.1       cgd  * vn_writechk() and VOP_ACCESS() for two reasons.
   3427   1.15   mycroft  * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case
   3428   1.27      fvdl  * 2 - The owner is to be given access irrespective of mode bits for some
   3429   1.27      fvdl  *     operations, so that processes that chmod after opening a file don't
   3430   1.27      fvdl  *     break. I don't like this because it opens a security hole, but since
   3431   1.27      fvdl  *     the nfs server opens a security hole the size of a barn door anyhow,
   3432   1.27      fvdl  *     what the heck.
   3433   1.31      fvdl  *
   3434   1.31      fvdl  * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS()
   3435   1.31      fvdl  * will return EPERM instead of EACCESS. EPERM is always an error.
   3436    1.1       cgd  */
   3437   1.22  christos int
   3438   1.99  christos nfsrv_access(vp, flags, cred, rdonly, lwp, override)
   3439   1.54  augustss 	struct vnode *vp;
   3440    1.1       cgd 	int flags;
   3441  1.109      elad 	kauth_cred_t cred;
   3442   1.15   mycroft 	int rdonly;
   3443   1.99  christos 	struct lwp *lwp;
   3444  1.116  christos 	int override;
   3445    1.1       cgd {
   3446    1.1       cgd 	struct vattr vattr;
   3447    1.1       cgd 	int error;
   3448    1.1       cgd 	if (flags & VWRITE) {
   3449   1.15   mycroft 		/* Just vn_writechk() changed to check rdonly */
   3450    1.1       cgd 		/*
   3451    1.1       cgd 		 * Disallow write attempts on read-only file systems;
   3452    1.1       cgd 		 * unless the file is a socket or a block or character
   3453    1.1       cgd 		 * device resident on the file system.
   3454    1.1       cgd 		 */
   3455   1.15   mycroft 		if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) {
   3456    1.1       cgd 			switch (vp->v_type) {
   3457   1.23      fvdl 			case VREG:
   3458   1.23      fvdl 			case VDIR:
   3459   1.23      fvdl 			case VLNK:
   3460    1.1       cgd 				return (EROFS);
   3461   1.23      fvdl 			default:
   3462   1.22  christos 				break;
   3463    1.1       cgd 			}
   3464    1.1       cgd 		}
   3465   1.59       chs 
   3466    1.1       cgd 		/*
   3467   1.59       chs 		 * If the vnode is in use as a process's text,
   3468   1.59       chs 		 * we can't allow writing.
   3469    1.1       cgd 		 */
   3470  1.130        ad 		if (vp->v_iflag & VI_TEXT)
   3471   1.40       mrg 			return (ETXTBSY);
   3472    1.1       cgd 	}
   3473  1.131     pooka 	error = VOP_GETATTR(vp, &vattr, cred);
   3474   1.23      fvdl 	if (error)
   3475    1.1       cgd 		return (error);
   3476  1.131     pooka 	error = VOP_ACCESS(vp, flags, cred);
   3477   1.27      fvdl 	/*
   3478   1.27      fvdl 	 * Allow certain operations for the owner (reads and writes
   3479   1.27      fvdl 	 * on files that are already open).
   3480   1.27      fvdl 	 */
   3481  1.109      elad 	if (override && error == EACCES && kauth_cred_geteuid(cred) == vattr.va_uid)
   3482   1.27      fvdl 		error = 0;
   3483   1.27      fvdl 	return error;
   3484    1.1       cgd }
   3485