2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * @(#)nfs_subs.c 8.8 (Berkeley) 5/22/95
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
39 * These functions support the macros and help fiddle mbuf chains for
40 * the nfs op functions. They do things like create the rpc header and
41 * copy data between mbuf chains and uio lists.
44 #include "opt_inet6.h"
46 #include <sys/param.h>
47 #include <sys/systm.h>
48 #include <sys/kernel.h>
52 #include <sys/mount.h>
53 #include <sys/vnode.h>
54 #include <sys/namei.h>
56 #include <sys/refcount.h>
57 #include <sys/socket.h>
59 #include <sys/malloc.h>
60 #include <sys/module.h>
61 #include <sys/sysent.h>
62 #include <sys/syscall.h>
63 #include <sys/sysproto.h>
66 #include <vm/vm_object.h>
67 #include <vm/vm_extern.h>
72 #include <nfs/nfsproto.h>
73 #include <nfsserver/nfs.h>
74 #include <nfs/xdr_subs.h>
75 #include <nfsserver/nfsm_subs.h>
77 #include <netinet/in.h>
80 * Data items converted to xdr at startup, since they are constant
81 * This is kinda hokey, but may save a little time doing byte swaps
83 u_int32_t nfsrv_nfs_xdrneg1;
84 u_int32_t nfsrv_nfs_true, nfsrv_nfs_false;
86 /* And other global data */
87 static const nfstype nfsv2_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR,
88 NFLNK, NFNON, NFCHR, NFNON };
89 #define vtonfsv2_type(a) txdr_unsigned(nfsv2_type[((int32_t)(a))])
90 #define vtonfsv3_mode(m) txdr_unsigned((m) & ALLPERMS)
97 * Mapping of old NFS Version 2 RPC numbers to generic numbers.
99 const int nfsrv_nfsv3_procid[NFS_NPROCS] = {
126 * and the reverse mapping from generic to Version 2 procedure numbers
128 const int nfsrvv2_procid[NFS_NPROCS] = {
155 * Maps errno values to nfs error numbers.
156 * Use 0 (which gets converted to NFSERR_IO) as the catch all for ones not
157 * specifically defined in RFC 1094.
159 static const u_char nfsrv_v2errmap[ELAST] = {
160 NFSERR_PERM, NFSERR_NOENT, 0, 0, 0,
161 NFSERR_NXIO, 0, 0, 0, 0,
162 0, 0, NFSERR_ACCES, 0, 0,
163 0, NFSERR_EXIST, 0, NFSERR_NODEV, NFSERR_NOTDIR,
164 NFSERR_ISDIR, 0, 0, 0, 0,
165 0, NFSERR_FBIG, NFSERR_NOSPC, 0, NFSERR_ROFS,
172 0, 0, NFSERR_NAMETOL, 0, 0,
173 NFSERR_NOTEMPTY, 0, 0, NFSERR_DQUOT, NFSERR_STALE,
178 * Maps errno values to nfs error numbers.
179 * Although it is not obvious whether or not NFS clients really care if
180 * a returned error value is in the specified list for the procedure, the
181 * safest thing to do is filter them appropriately. For Version 2, the
182 * X/Open XNFS document is the only specification that defines error values
183 * for each RPC (The RFC simply lists all possible error values for all RPCs),
184 * so I have decided to not do this for Version 2.
185 * The first entry is the default error return and the rest are the valid
186 * errors for that RPC in increasing numeric order.
188 static const short nfsv3err_null[] = {
193 static const short nfsv3err_getattr[] = {
202 static const short nfsv3err_setattr[] = {
218 static const short nfsv3err_lookup[] = {
231 static const short nfsv3err_access[] = {
240 static const short nfsv3err_readlink[] = {
252 static const short nfsv3err_read[] = {
264 static const short nfsv3err_write[] = {
279 static const short nfsv3err_create[] = {
296 static const short nfsv3err_mkdir[] = {
313 static const short nfsv3err_symlink[] = {
330 static const short nfsv3err_mknod[] = {
348 static const short nfsv3err_remove[] = {
362 static const short nfsv3err_rmdir[] = {
380 static const short nfsv3err_rename[] = {
403 static const short nfsv3err_link[] = {
423 static const short nfsv3err_readdir[] = {
436 static const short nfsv3err_readdirplus[] = {
450 static const short nfsv3err_fsstat[] = {
459 static const short nfsv3err_fsinfo[] = {
467 static const short nfsv3err_pathconf[] = {
475 static const short nfsv3err_commit[] = {
484 static const short *nfsrv_v3errmap[] = {
502 nfsv3err_readdirplus,
509 extern int (*nfsd_call_nfsserver)(struct thread *, struct nfssvc_args *);
512 * Called once to initialize data structures...
515 nfsrv_modevent(module_t mod, int type, void *data)
521 mtx_init(&nfsd_mtx, "nfsd_mtx", NULL, MTX_DEF);
522 nfsrv_nfs_true = txdr_unsigned(TRUE);
523 nfsrv_nfs_false = txdr_unsigned(FALSE);
524 nfsrv_nfs_xdrneg1 = txdr_unsigned(-1);
525 nfsrv_ticks = (hz * NFS_TICKINTVL + 500) / 1000;
530 nfsrv_init(0); /* Init server data structures */
533 nfsd_call_nfsserver = nfssvc_nfsserver;
537 if (nfsrv_numnfsd != 0) {
542 nfsd_call_nfsserver = NULL;
543 callout_drain(&nfsrv_callout);
544 mtx_destroy(&nfsd_mtx);
552 static moduledata_t nfsserver_mod = {
557 DECLARE_MODULE(nfsserver, nfsserver_mod, SI_SUB_VFS, SI_ORDER_ANY);
559 /* So that loader and kldload(2) can find us, wherever we are.. */
560 MODULE_VERSION(nfsserver, 1);
561 MODULE_DEPEND(nfsserver, nfssvc, 1, 1, 1);
562 MODULE_DEPEND(nfsserver, krpc, 1, 1, 1);
563 MODULE_DEPEND(nfsserver, nfs_common, 1, 1, 1);
566 * Set up nameidata for a lookup() call and do it.
568 * If pubflag is set, this call is done for a lookup operation on the
569 * public filehandle. In that case we allow crossing mountpoints and
570 * absolute pathnames. However, the caller is expected to check that
571 * the lookup result is within the public fs, and deny access if
574 * nfs_namei() clears out garbage fields that namei() might leave garbage.
575 * This is mainly ni_vp and ni_dvp when an error occurs, and ni_dvp when no
576 * error occurs but the parent was not requested.
578 * dirp may be set whether an error is returned or not, and must be
579 * released by the caller.
582 nfs_namei(struct nameidata *ndp, struct nfsrv_descript *nfsd,
583 fhandle_t *fhp, int len, struct nfssvc_sock *slp,
584 struct sockaddr *nam, struct mbuf **mdp,
585 caddr_t *dposp, struct vnode **retdirp, int v3, struct vattr *retdirattrp,
586 int *retdirattr_retp, int pubflag)
590 char *fromcp, *tocp, *cp;
594 int error, rdonly, linklen;
595 struct componentname *cnp = &ndp->ni_cnd;
596 int lockleaf = (cnp->cn_flags & LOCKLEAF) != 0;
603 cnp->cn_flags |= NOMACCHECK;
604 cnp->cn_pnbuf = uma_zalloc(namei_zone, M_WAITOK);
607 * Copy the name from the mbuf list to ndp->ni_pnbuf
608 * and set the various ndp fields appropriately.
611 tocp = cnp->cn_pnbuf;
613 rem = mtod(md, caddr_t) + md->m_len - fromcp;
614 for (i = 0; i < len; i++) {
621 fromcp = mtod(md, caddr_t);
624 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) {
634 len = nfsm_rndup(len)-len;
638 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0)
642 if (!pubflag && nfs_ispublicfh(fhp))
646 * Extract and set starting directory.
648 error = nfsrv_fhtovp(fhp, 0, &dp, &dvfslocked, nfsd, slp, nam, &rdonly);
651 vfslocked = VFS_LOCK_GIANT(dp->v_mount);
652 if (dp->v_type != VDIR) {
659 cnp->cn_flags |= RDONLY;
662 * Set return directory. Reference to dp is implicitly transfered
663 * to the returned pointer
667 *retdirattr_retp = VOP_GETATTR(dp, retdirattrp,
668 ndp->ni_cnd.cn_cred);
675 * Oh joy. For WebNFS, handle those pesky '%' escapes,
676 * and the 'native path' indicator.
678 cp = uma_zalloc(namei_zone, M_WAITOK);
679 fromcp = cnp->cn_pnbuf;
681 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) {
682 switch ((unsigned char)*fromcp) {
683 case WEBNFS_NATIVE_CHAR:
685 * 'Native' path for us is the same
686 * as a path according to the NFS spec,
687 * just skip the escape char.
692 * More may be added in the future, range 0x80-0xff
696 uma_zfree(namei_zone, cp);
701 * Translate the '%' escapes, URL-style.
703 while (*fromcp != '\0') {
704 if (*fromcp == WEBNFS_ESC_CHAR) {
705 if (fromcp[1] != '\0' && fromcp[2] != '\0') {
707 *tocp++ = HEXSTRTOI(fromcp);
712 uma_zfree(namei_zone, cp);
719 uma_zfree(namei_zone, cnp->cn_pnbuf);
723 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1;
724 ndp->ni_segflg = UIO_SYSSPACE;
727 ndp->ni_rootdir = rootvnode;
729 if (cnp->cn_pnbuf[0] == '/') {
732 tvfslocked = VFS_LOCK_GIANT(rootvnode->v_mount);
733 VFS_UNLOCK_GIANT(vfslocked);
735 vfslocked = tvfslocked;
738 cnp->cn_flags |= NOCROSSMOUNT;
742 * Initialize for scan, set ni_startdir and bump ref on dp again
743 * because lookup() will dereference ni_startdir.
746 cnp->cn_thread = curthread;
748 ndp->ni_startdir = dp;
751 cnp->cn_flags |= LOCKLEAF;
753 cnp->cn_nameptr = cnp->cn_pnbuf;
755 * Call lookup() to do the real work. If an error occurs,
756 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and
757 * we do not have to dereference anything before returning.
758 * In either case ni_startdir will be dereferenced and NULLed
762 ndp->ni_cnd.cn_flags |= GIANTHELD;
764 vfslocked = (ndp->ni_cnd.cn_flags & GIANTHELD) != 0;
765 ndp->ni_cnd.cn_flags &= ~GIANTHELD;
770 * Check for encountering a symbolic link. Trivial
771 * termination occurs if no symlink encountered.
772 * Note: zfree is safe because error is 0, so we will
773 * not zfree it again when we break.
775 if ((cnp->cn_flags & ISSYMLINK) == 0) {
776 if (cnp->cn_flags & (SAVENAME | SAVESTART))
777 cnp->cn_flags |= HASBUF;
779 uma_zfree(namei_zone, cnp->cn_pnbuf);
780 if (ndp->ni_vp && !lockleaf)
781 VOP_UNLOCK(ndp->ni_vp, 0);
788 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1)
789 VOP_UNLOCK(ndp->ni_dvp, 0);
795 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) {
799 if (ndp->ni_pathlen > 1)
800 cp = uma_zalloc(namei_zone, M_WAITOK);
804 aiov.iov_len = MAXPATHLEN;
805 auio.uio_iov = &aiov;
808 auio.uio_rw = UIO_READ;
809 auio.uio_segflg = UIO_SYSSPACE;
811 auio.uio_resid = MAXPATHLEN;
812 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred);
815 if (ndp->ni_pathlen > 1)
816 uma_zfree(namei_zone, cp);
822 linklen = MAXPATHLEN - auio.uio_resid;
827 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) {
828 error = ENAMETOOLONG;
833 * Adjust or replace path
835 if (ndp->ni_pathlen > 1) {
836 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen);
837 uma_zfree(namei_zone, cnp->cn_pnbuf);
840 cnp->cn_pnbuf[linklen] = '\0';
841 ndp->ni_pathlen += linklen;
844 * Cleanup refs for next loop and check if root directory
845 * should replace current directory. Normally ni_dvp
846 * becomes the new base directory and is cleaned up when
847 * we loop. Explicitly null pointers after invalidation
848 * to clarify operation.
853 if (cnp->cn_pnbuf[0] == '/') {
855 ndp->ni_dvp = ndp->ni_rootdir;
858 ndp->ni_startdir = ndp->ni_dvp;
862 cnp->cn_flags &= ~LOCKLEAF;
863 if (cnp->cn_flags & GIANTHELD) {
865 cnp->cn_flags &= ~GIANTHELD;
869 * nfs_namei() guarentees that fields will not contain garbage
870 * whether an error occurs or not. This allows the caller to track
871 * cleanup state trivially.
875 uma_zfree(namei_zone, cnp->cn_pnbuf);
878 ndp->ni_startdir = NULL;
879 cnp->cn_flags &= ~HASBUF;
880 VFS_UNLOCK_GIANT(vfslocked);
882 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) {
886 * This differs from normal namei() in that even on failure we may
887 * return with Giant held due to the dirp return. Make sure we only
888 * have not recursed however. The calling code only expects to drop
891 if (vfslocked || dvfslocked)
892 ndp->ni_cnd.cn_flags |= GIANTHELD;
893 if (vfslocked && dvfslocked)
894 VFS_UNLOCK_GIANT(vfslocked);
899 * A fiddled version of m_adj() that ensures null fill to a long
900 * boundary and only trims off the back end
903 nfsm_adj(struct mbuf *mp, int len, int nul)
910 * Trim from tail. Scan the mbuf chain,
911 * calculating its length and finding the last mbuf.
912 * If the adjustment only affects this mbuf, then just
913 * adjust and return. Otherwise, rescan and truncate
914 * after the remaining size.
920 if (m->m_next == NULL)
924 if (m->m_len > len) {
927 cp = mtod(m, caddr_t)+m->m_len-nul;
928 for (i = 0; i < nul; i++)
937 * Correct length for chain is "count".
938 * Find the mbuf with last data, adjust its length,
939 * and toss data from remaining mbufs on chain.
941 for (m = mp; m; m = m->m_next) {
942 if (m->m_len >= count) {
945 cp = mtod(m, caddr_t)+m->m_len-nul;
946 for (i = 0; i < nul; i++)
949 if (m->m_next != NULL) {
960 * Make these functions instead of macros, so that the kernel text size
961 * doesn't get too big...
964 nfsm_srvwcc(struct nfsrv_descript *nfsd, int before_ret,
965 struct vattr *before_vap, int after_ret, struct vattr *after_vap,
966 struct mbuf **mbp, char **bposp)
968 struct mbuf *mb = *mbp;
973 tl = nfsm_build(u_int32_t *, NFSX_UNSIGNED);
974 *tl = nfsrv_nfs_false;
976 tl = nfsm_build(u_int32_t *, 7 * NFSX_UNSIGNED);
977 *tl++ = nfsrv_nfs_true;
978 txdr_hyper(before_vap->va_size, tl);
980 txdr_nfsv3time(&(before_vap->va_mtime), tl);
982 txdr_nfsv3time(&(before_vap->va_ctime), tl);
986 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp);
990 nfsm_srvpostopattr(struct nfsrv_descript *nfsd, int after_ret,
991 struct vattr *after_vap, struct mbuf **mbp, char **bposp)
993 struct mbuf *mb = *mbp;
996 struct nfs_fattr *fp;
999 tl = nfsm_build(u_int32_t *, NFSX_UNSIGNED);
1000 *tl = nfsrv_nfs_false;
1002 tl = nfsm_build(u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR);
1003 *tl++ = nfsrv_nfs_true;
1004 fp = (struct nfs_fattr *)tl;
1005 nfsm_srvfattr(nfsd, after_vap, fp);
1012 nfsm_srvfattr(struct nfsrv_descript *nfsd, struct vattr *vap,
1013 struct nfs_fattr *fp)
1016 fp->fa_nlink = txdr_unsigned(vap->va_nlink);
1017 fp->fa_uid = txdr_unsigned(vap->va_uid);
1018 fp->fa_gid = txdr_unsigned(vap->va_gid);
1019 if (nfsd->nd_flag & ND_NFSV3) {
1020 fp->fa_type = vtonfsv3_type(vap->va_type);
1021 fp->fa_mode = vtonfsv3_mode(vap->va_mode);
1022 txdr_hyper(vap->va_size, &fp->fa3_size);
1023 txdr_hyper(vap->va_bytes, &fp->fa3_used);
1024 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev));
1025 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev));
1026 fp->fa3_fsid.nfsuquad[0] = 0;
1027 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid);
1028 fp->fa3_fileid.nfsuquad[0] = 0;
1029 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid);
1030 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime);
1031 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime);
1032 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime);
1034 fp->fa_type = vtonfsv2_type(vap->va_type);
1035 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1036 fp->fa2_size = txdr_unsigned(vap->va_size);
1037 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize);
1038 if (vap->va_type == VFIFO)
1039 fp->fa2_rdev = 0xffffffff;
1041 fp->fa2_rdev = txdr_unsigned(vap->va_rdev);
1042 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE);
1043 fp->fa2_fsid = txdr_unsigned(vap->va_fsid);
1044 fp->fa2_fileid = txdr_unsigned(vap->va_fileid);
1045 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime);
1046 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime);
1047 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime);
1052 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked)
1053 * - look up fsid in mount list (if not found ret error)
1054 * - get vp and export rights by calling VFS_FHTOVP()
1055 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon
1058 nfsrv_fhtovp(fhandle_t *fhp, int flags, struct vnode **vpp, int *vfslockedp,
1059 struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
1060 struct sockaddr *nam, int *rdonlyp)
1064 struct ucred *cred, *credanon;
1066 #ifdef MNT_EXNORESPORT /* XXX needs mountd and /etc/exports help yet */
1067 struct sockaddr_int *saddr;
1071 int numsecflavors, *secflavors;
1073 int v3 = nfsd->nd_flag & ND_NFSV3;
1079 if (nfs_ispublicfh(fhp)) {
1080 if (!nfs_pub.np_valid)
1082 fhp = &nfs_pub.np_handle;
1085 mp = vfs_busyfs(&fhp->fh_fsid);
1088 vfslocked = VFS_LOCK_GIANT(mp);
1089 error = VFS_CHECKEXP(mp, nam, &exflags, &credanon,
1090 &numsecflavors, &secflavors);
1095 if (numsecflavors == 0) {
1097 * This can happen if the system is running with an
1098 * old mountd that doesn't pass in a secflavor list.
1102 secflavors = &authsys;
1104 credflavor = nfsd->nd_credflavor;
1105 for (i = 0; i < numsecflavors; i++) {
1106 if (secflavors[i] == credflavor)
1109 if (i == numsecflavors) {
1111 * RFC 2623 section 2.3.2 - allow certain procedures
1112 * used at NFS client mount time even if they have
1113 * weak authentication.
1117 if (nfsd->nd_procnum == NFSPROC_FSINFO
1118 || nfsd->nd_procnum == NFSPROC_GETATTR)
1121 if (nfsd->nd_procnum == NFSPROC_FSSTAT
1122 || nfsd->nd_procnum == NFSPROC_GETATTR)
1126 error = NFSERR_AUTHERR | AUTH_TOOWEAK;
1131 error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, vpp);
1133 /* Make sure the server replies ESTALE to the client. */
1138 #ifdef MNT_EXNORESPORT
1139 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) {
1140 saddr = (struct sockaddr_in *)nam;
1141 if ((saddr->sin_family == AF_INET ||
1142 saddr->sin_family == AF_INET6) &&
1143 /* same code for INET and INET6: sin*_port at same offet */
1144 ntohs(saddr->sin_port) >= IPPORT_RESERVED) {
1147 error = NFSERR_AUTHERR | AUTH_TOOWEAK;
1154 * Check/setup credentials.
1157 if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) {
1158 cred->cr_uid = credanon->cr_uid;
1159 crsetgroups(cred, credanon->cr_ngroups, credanon->cr_groups);
1161 if (exflags & MNT_EXRDONLY)
1166 if (!(flags & NFSRV_FLAG_BUSY))
1169 if (credanon != NULL)
1173 VFS_UNLOCK_GIANT(vfslocked);
1175 *vfslockedp = vfslocked;
1181 * WebNFS: check if a filehandle is a public filehandle. For v3, this
1182 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has
1183 * transformed this to all zeroes in both cases, so check for it.
1186 nfs_ispublicfh(fhandle_t *fhp)
1188 char *cp = (char *)fhp;
1191 NFSD_LOCK_DONTCARE();
1193 for (i = 0; i < NFSX_V3FH; i++)
1200 * Map errnos to NFS error numbers. For Version 3 also filter out error
1201 * numbers not specified for the associated procedure.
1204 nfsrv_errmap(struct nfsrv_descript *nd, int err)
1206 const short *defaulterrp, *errp;
1210 if (nd->nd_flag & ND_NFSV3) {
1211 if (nd->nd_procnum <= NFSPROC_COMMIT) {
1212 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum];
1216 else if (*errp > err)
1219 return ((int)*defaulterrp);
1221 return (err & 0xffff);
1225 e = nfsrv_v2errmap[err - 1];
1232 * Sort the group list in increasing numerical order.
1233 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort
1234 * that used to be here.)
1237 nfsrvw_sort(gid_t *list, int num)
1242 /* Insertion sort. */
1243 for (i = 1; i < num; i++) {
1245 /* find correct slot for value v, moving others up */
1246 for (j = i; --j >= 0 && v < list[j];)
1247 list[j + 1] = list[j];
1253 * Helper functions for macros.
1257 nfsm_srvfhtom_xx(fhandle_t *f, int v3, struct mbuf **mb, caddr_t *bpos)
1262 tl = nfsm_build_xx(NFSX_UNSIGNED + NFSX_V3FH, mb, bpos);
1263 *tl++ = txdr_unsigned(NFSX_V3FH);
1264 bcopy(f, tl, NFSX_V3FH);
1266 tl = nfsm_build_xx(NFSX_V2FH, mb, bpos);
1267 bcopy(f, tl, NFSX_V2FH);
1272 nfsm_srvpostop_fh_xx(fhandle_t *f, struct mbuf **mb, caddr_t *bpos)
1276 tl = nfsm_build_xx(2 * NFSX_UNSIGNED + NFSX_V3FH, mb, bpos);
1277 *tl++ = nfsrv_nfs_true;
1278 *tl++ = txdr_unsigned(NFSX_V3FH);
1279 bcopy(f, tl, NFSX_V3FH);
1283 nfsm_srvstrsiz_xx(int *s, int m, struct mbuf **md, caddr_t *dpos)
1287 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1290 *s = fxdr_unsigned(int32_t, *tl);
1291 if (*s > m || *s <= 0)
1297 nfsm_srvnamesiz_xx(int *s, int m, struct mbuf **md, caddr_t *dpos)
1301 NFSD_LOCK_DONTCARE();
1303 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1306 *s = fxdr_unsigned(int32_t, *tl);
1308 return NFSERR_NAMETOL;
1315 nfsm_srvnamesiz0_xx(int *s, int m, struct mbuf **md, caddr_t *dpos)
1319 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1322 *s = fxdr_unsigned(int32_t, *tl);
1324 return NFSERR_NAMETOL;
1331 nfsm_clget_xx(u_int32_t **tl, struct mbuf *mb, struct mbuf **mp,
1332 char **bp, char **be, caddr_t bpos)
1336 NFSD_UNLOCK_ASSERT();
1340 (*mp)->m_len += *bp - bpos;
1341 MGET(nmp, M_WAIT, MT_DATA);
1342 MCLGET(nmp, M_WAIT);
1343 nmp->m_len = NFSMSIZ(nmp);
1344 (*mp)->m_next = nmp;
1346 *bp = mtod(*mp, caddr_t);
1347 *be = *bp + (*mp)->m_len;
1349 *tl = (u_int32_t *)*bp;
1353 nfsm_srvmtofh_xx(fhandle_t *f, int v3, struct mbuf **md, caddr_t *dpos)
1359 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1362 fhlen = fxdr_unsigned(int, *tl);
1363 if (fhlen != 0 && fhlen != NFSX_V3FH)
1369 tl = nfsm_dissect_xx_nonblock(fhlen, md, dpos);
1372 bcopy((caddr_t)tl, (caddr_t)(f), fhlen);
1374 bzero((caddr_t)(f), NFSX_V3FH);
1380 nfsm_srvsattr_xx(struct vattr *a, struct mbuf **md, caddr_t *dpos)
1385 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1388 if (*tl == nfsrv_nfs_true) {
1389 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1392 (a)->va_mode = nfstov_mode(*tl);
1394 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1397 if (*tl == nfsrv_nfs_true) {
1398 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1401 (a)->va_uid = fxdr_unsigned(uid_t, *tl);
1403 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1406 if (*tl == nfsrv_nfs_true) {
1407 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1410 (a)->va_gid = fxdr_unsigned(gid_t, *tl);
1412 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1415 if (*tl == nfsrv_nfs_true) {
1416 tl = nfsm_dissect_xx_nonblock(2 * NFSX_UNSIGNED, md, dpos);
1419 (a)->va_size = fxdr_hyper(tl);
1421 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1424 switch (fxdr_unsigned(int, *tl)) {
1425 case NFSV3SATTRTIME_TOCLIENT:
1426 tl = nfsm_dissect_xx_nonblock(2 * NFSX_UNSIGNED, md, dpos);
1429 fxdr_nfsv3time(tl, &(a)->va_atime);
1432 case NFSV3SATTRTIME_TOSERVER:
1433 vfs_timestamp(&a->va_atime);
1434 a->va_vaflags |= VA_UTIMES_NULL;
1437 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1440 switch (fxdr_unsigned(int, *tl)) {
1441 case NFSV3SATTRTIME_TOCLIENT:
1442 tl = nfsm_dissect_xx_nonblock(2 * NFSX_UNSIGNED, md, dpos);
1445 fxdr_nfsv3time(tl, &(a)->va_mtime);
1446 a->va_vaflags &= ~VA_UTIMES_NULL;
1448 case NFSV3SATTRTIME_TOSERVER:
1449 vfs_timestamp(&a->va_mtime);
1451 a->va_vaflags |= VA_UTIMES_NULL;