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)
643 * Extract and set starting directory.
645 error = nfsrv_fhtovp(fhp, FALSE, &dp, &dvfslocked,
646 nfsd, slp, nam, &rdonly, pubflag);
649 vfslocked = VFS_LOCK_GIANT(dp->v_mount);
650 if (dp->v_type != VDIR) {
657 cnp->cn_flags |= RDONLY;
660 * Set return directory. Reference to dp is implicitly transfered
661 * to the returned pointer
665 vn_lock(dp, LK_EXCLUSIVE | LK_RETRY);
666 *retdirattr_retp = VOP_GETATTR(dp, retdirattrp,
667 ndp->ni_cnd.cn_cred);
673 * Oh joy. For WebNFS, handle those pesky '%' escapes,
674 * and the 'native path' indicator.
676 cp = uma_zalloc(namei_zone, M_WAITOK);
677 fromcp = cnp->cn_pnbuf;
679 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) {
680 switch ((unsigned char)*fromcp) {
681 case WEBNFS_NATIVE_CHAR:
683 * 'Native' path for us is the same
684 * as a path according to the NFS spec,
685 * just skip the escape char.
690 * More may be added in the future, range 0x80-0xff
694 uma_zfree(namei_zone, cp);
699 * Translate the '%' escapes, URL-style.
701 while (*fromcp != '\0') {
702 if (*fromcp == WEBNFS_ESC_CHAR) {
703 if (fromcp[1] != '\0' && fromcp[2] != '\0') {
705 *tocp++ = HEXSTRTOI(fromcp);
710 uma_zfree(namei_zone, cp);
717 uma_zfree(namei_zone, cnp->cn_pnbuf);
721 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1;
722 ndp->ni_segflg = UIO_SYSSPACE;
725 ndp->ni_rootdir = rootvnode;
727 if (cnp->cn_pnbuf[0] == '/') {
730 tvfslocked = VFS_LOCK_GIANT(rootvnode->v_mount);
731 VFS_UNLOCK_GIANT(vfslocked);
733 vfslocked = tvfslocked;
736 cnp->cn_flags |= NOCROSSMOUNT;
740 * Initialize for scan, set ni_startdir and bump ref on dp again
741 * because lookup() will dereference ni_startdir.
744 cnp->cn_thread = curthread;
746 ndp->ni_startdir = dp;
749 cnp->cn_flags |= LOCKLEAF;
751 cnp->cn_nameptr = cnp->cn_pnbuf;
753 * Call lookup() to do the real work. If an error occurs,
754 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and
755 * we do not have to dereference anything before returning.
756 * In either case ni_startdir will be dereferenced and NULLed
760 ndp->ni_cnd.cn_flags |= GIANTHELD;
762 vfslocked = (ndp->ni_cnd.cn_flags & GIANTHELD) != 0;
763 ndp->ni_cnd.cn_flags &= ~GIANTHELD;
768 * Check for encountering a symbolic link. Trivial
769 * termination occurs if no symlink encountered.
770 * Note: zfree is safe because error is 0, so we will
771 * not zfree it again when we break.
773 if ((cnp->cn_flags & ISSYMLINK) == 0) {
774 if (cnp->cn_flags & (SAVENAME | SAVESTART))
775 cnp->cn_flags |= HASBUF;
777 uma_zfree(namei_zone, cnp->cn_pnbuf);
778 if (ndp->ni_vp && !lockleaf)
779 VOP_UNLOCK(ndp->ni_vp, 0);
786 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1)
787 VOP_UNLOCK(ndp->ni_dvp, 0);
793 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) {
797 if (ndp->ni_pathlen > 1)
798 cp = uma_zalloc(namei_zone, M_WAITOK);
802 aiov.iov_len = MAXPATHLEN;
803 auio.uio_iov = &aiov;
806 auio.uio_rw = UIO_READ;
807 auio.uio_segflg = UIO_SYSSPACE;
809 auio.uio_resid = MAXPATHLEN;
810 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred);
813 if (ndp->ni_pathlen > 1)
814 uma_zfree(namei_zone, cp);
820 linklen = MAXPATHLEN - auio.uio_resid;
825 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) {
826 error = ENAMETOOLONG;
831 * Adjust or replace path
833 if (ndp->ni_pathlen > 1) {
834 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen);
835 uma_zfree(namei_zone, cnp->cn_pnbuf);
838 cnp->cn_pnbuf[linklen] = '\0';
839 ndp->ni_pathlen += linklen;
842 * Cleanup refs for next loop and check if root directory
843 * should replace current directory. Normally ni_dvp
844 * becomes the new base directory and is cleaned up when
845 * we loop. Explicitly null pointers after invalidation
846 * to clarify operation.
851 if (cnp->cn_pnbuf[0] == '/') {
853 ndp->ni_dvp = ndp->ni_rootdir;
856 ndp->ni_startdir = ndp->ni_dvp;
860 cnp->cn_flags &= ~LOCKLEAF;
861 if (cnp->cn_flags & GIANTHELD) {
863 cnp->cn_flags &= ~GIANTHELD;
867 * nfs_namei() guarentees that fields will not contain garbage
868 * whether an error occurs or not. This allows the caller to track
869 * cleanup state trivially.
873 uma_zfree(namei_zone, cnp->cn_pnbuf);
876 ndp->ni_startdir = NULL;
877 cnp->cn_flags &= ~HASBUF;
878 VFS_UNLOCK_GIANT(vfslocked);
880 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) {
884 * This differs from normal namei() in that even on failure we may
885 * return with Giant held due to the dirp return. Make sure we only
886 * have not recursed however. The calling code only expects to drop
889 if (vfslocked || dvfslocked)
890 ndp->ni_cnd.cn_flags |= GIANTHELD;
891 if (vfslocked && dvfslocked)
892 VFS_UNLOCK_GIANT(vfslocked);
897 * A fiddled version of m_adj() that ensures null fill to a long
898 * boundary and only trims off the back end
901 nfsm_adj(struct mbuf *mp, int len, int nul)
908 * Trim from tail. Scan the mbuf chain,
909 * calculating its length and finding the last mbuf.
910 * If the adjustment only affects this mbuf, then just
911 * adjust and return. Otherwise, rescan and truncate
912 * after the remaining size.
918 if (m->m_next == NULL)
922 if (m->m_len > len) {
925 cp = mtod(m, caddr_t)+m->m_len-nul;
926 for (i = 0; i < nul; i++)
935 * Correct length for chain is "count".
936 * Find the mbuf with last data, adjust its length,
937 * and toss data from remaining mbufs on chain.
939 for (m = mp; m; m = m->m_next) {
940 if (m->m_len >= count) {
943 cp = mtod(m, caddr_t)+m->m_len-nul;
944 for (i = 0; i < nul; i++)
947 if (m->m_next != NULL) {
958 * Make these functions instead of macros, so that the kernel text size
959 * doesn't get too big...
962 nfsm_srvwcc(struct nfsrv_descript *nfsd, int before_ret,
963 struct vattr *before_vap, int after_ret, struct vattr *after_vap,
964 struct mbuf **mbp, char **bposp)
966 struct mbuf *mb = *mbp;
971 tl = nfsm_build(u_int32_t *, NFSX_UNSIGNED);
972 *tl = nfsrv_nfs_false;
974 tl = nfsm_build(u_int32_t *, 7 * NFSX_UNSIGNED);
975 *tl++ = nfsrv_nfs_true;
976 txdr_hyper(before_vap->va_size, tl);
978 txdr_nfsv3time(&(before_vap->va_mtime), tl);
980 txdr_nfsv3time(&(before_vap->va_ctime), tl);
984 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp);
988 nfsm_srvpostopattr(struct nfsrv_descript *nfsd, int after_ret,
989 struct vattr *after_vap, struct mbuf **mbp, char **bposp)
991 struct mbuf *mb = *mbp;
994 struct nfs_fattr *fp;
997 tl = nfsm_build(u_int32_t *, NFSX_UNSIGNED);
998 *tl = nfsrv_nfs_false;
1000 tl = nfsm_build(u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR);
1001 *tl++ = nfsrv_nfs_true;
1002 fp = (struct nfs_fattr *)tl;
1003 nfsm_srvfattr(nfsd, after_vap, fp);
1010 nfsm_srvfattr(struct nfsrv_descript *nfsd, struct vattr *vap,
1011 struct nfs_fattr *fp)
1014 fp->fa_nlink = txdr_unsigned(vap->va_nlink);
1015 fp->fa_uid = txdr_unsigned(vap->va_uid);
1016 fp->fa_gid = txdr_unsigned(vap->va_gid);
1017 if (nfsd->nd_flag & ND_NFSV3) {
1018 fp->fa_type = vtonfsv3_type(vap->va_type);
1019 fp->fa_mode = vtonfsv3_mode(vap->va_mode);
1020 txdr_hyper(vap->va_size, &fp->fa3_size);
1021 txdr_hyper(vap->va_bytes, &fp->fa3_used);
1022 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev));
1023 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev));
1024 fp->fa3_fsid.nfsuquad[0] = 0;
1025 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid);
1026 fp->fa3_fileid.nfsuquad[0] = 0;
1027 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid);
1028 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime);
1029 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime);
1030 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime);
1032 fp->fa_type = vtonfsv2_type(vap->va_type);
1033 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1034 fp->fa2_size = txdr_unsigned(vap->va_size);
1035 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize);
1036 if (vap->va_type == VFIFO)
1037 fp->fa2_rdev = 0xffffffff;
1039 fp->fa2_rdev = txdr_unsigned(vap->va_rdev);
1040 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE);
1041 fp->fa2_fsid = txdr_unsigned(vap->va_fsid);
1042 fp->fa2_fileid = txdr_unsigned(vap->va_fileid);
1043 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime);
1044 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime);
1045 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime);
1050 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked)
1051 * - look up fsid in mount list (if not found ret error)
1052 * - get vp and export rights by calling VFS_FHTOVP()
1053 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon
1054 * - if not lockflag unlock it with VOP_UNLOCK()
1057 nfsrv_fhtovp(fhandle_t *fhp, int lockflag, struct vnode **vpp, int *vfslockedp,
1058 struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
1059 struct sockaddr *nam, int *rdonlyp, int pubflag)
1063 struct ucred *cred, *credanon;
1065 #ifdef MNT_EXNORESPORT /* XXX needs mountd and /etc/exports help yet */
1066 struct sockaddr_int *saddr;
1070 int numsecflavors, *secflavors;
1072 int v3 = nfsd->nd_flag & ND_NFSV3;
1078 if (nfs_ispublicfh(fhp)) {
1079 if (!pubflag || !nfs_pub.np_valid)
1081 fhp = &nfs_pub.np_handle;
1084 mp = vfs_busyfs(&fhp->fh_fsid);
1087 vfslocked = VFS_LOCK_GIANT(mp);
1088 error = VFS_CHECKEXP(mp, nam, &exflags, &credanon,
1089 &numsecflavors, &secflavors);
1094 if (numsecflavors == 0) {
1096 * This can happen if the system is running with an
1097 * old mountd that doesn't pass in a secflavor list.
1101 secflavors = &authsys;
1103 credflavor = nfsd->nd_credflavor;
1104 for (i = 0; i < numsecflavors; i++) {
1105 if (secflavors[i] == credflavor)
1108 if (i == numsecflavors) {
1110 * RFC 2623 section 2.3.2 - allow certain procedures
1111 * used at NFS client mount time even if they have
1112 * weak authentication.
1116 if (nfsd->nd_procnum == NFSPROC_FSINFO
1117 || nfsd->nd_procnum == NFSPROC_GETATTR)
1120 if (nfsd->nd_procnum == NFSPROC_FSSTAT
1121 || nfsd->nd_procnum == NFSPROC_GETATTR)
1125 error = NFSERR_AUTHERR | AUTH_TOOWEAK;
1130 error = VFS_FHTOVP(mp, &fhp->fh_fid, vpp);
1132 /* Make sure the server replies ESTALE to the client. */
1137 #ifdef MNT_EXNORESPORT
1138 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) {
1139 saddr = (struct sockaddr_in *)nam;
1140 if ((saddr->sin_family == AF_INET ||
1141 saddr->sin_family == AF_INET6) &&
1142 /* same code for INET and INET6: sin*_port at same offet */
1143 ntohs(saddr->sin_port) >= IPPORT_RESERVED) {
1146 error = NFSERR_AUTHERR | AUTH_TOOWEAK;
1151 * Check/setup credentials.
1154 if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) {
1155 cred->cr_uid = credanon->cr_uid;
1156 crsetgroups(cred, credanon->cr_ngroups, credanon->cr_groups);
1158 if (exflags & MNT_EXRDONLY)
1164 VOP_UNLOCK(*vpp, 0);
1166 if (credanon != NULL)
1170 VFS_UNLOCK_GIANT(vfslocked);
1172 *vfslockedp = vfslocked;
1178 * WebNFS: check if a filehandle is a public filehandle. For v3, this
1179 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has
1180 * transformed this to all zeroes in both cases, so check for it.
1183 nfs_ispublicfh(fhandle_t *fhp)
1185 char *cp = (char *)fhp;
1188 NFSD_LOCK_DONTCARE();
1190 for (i = 0; i < NFSX_V3FH; i++)
1197 * Map errnos to NFS error numbers. For Version 3 also filter out error
1198 * numbers not specified for the associated procedure.
1201 nfsrv_errmap(struct nfsrv_descript *nd, int err)
1203 const short *defaulterrp, *errp;
1207 if (nd->nd_flag & ND_NFSV3) {
1208 if (nd->nd_procnum <= NFSPROC_COMMIT) {
1209 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum];
1213 else if (*errp > err)
1216 return ((int)*defaulterrp);
1218 return (err & 0xffff);
1222 e = nfsrv_v2errmap[err - 1];
1229 * Sort the group list in increasing numerical order.
1230 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort
1231 * that used to be here.)
1234 nfsrvw_sort(gid_t *list, int num)
1239 /* Insertion sort. */
1240 for (i = 1; i < num; i++) {
1242 /* find correct slot for value v, moving others up */
1243 for (j = i; --j >= 0 && v < list[j];)
1244 list[j + 1] = list[j];
1250 * Helper functions for macros.
1254 nfsm_srvfhtom_xx(fhandle_t *f, int v3, struct mbuf **mb, caddr_t *bpos)
1259 tl = nfsm_build_xx(NFSX_UNSIGNED + NFSX_V3FH, mb, bpos);
1260 *tl++ = txdr_unsigned(NFSX_V3FH);
1261 bcopy(f, tl, NFSX_V3FH);
1263 tl = nfsm_build_xx(NFSX_V2FH, mb, bpos);
1264 bcopy(f, tl, NFSX_V2FH);
1269 nfsm_srvpostop_fh_xx(fhandle_t *f, struct mbuf **mb, caddr_t *bpos)
1273 tl = nfsm_build_xx(2 * NFSX_UNSIGNED + NFSX_V3FH, mb, bpos);
1274 *tl++ = nfsrv_nfs_true;
1275 *tl++ = txdr_unsigned(NFSX_V3FH);
1276 bcopy(f, tl, NFSX_V3FH);
1280 nfsm_srvstrsiz_xx(int *s, int m, struct mbuf **md, caddr_t *dpos)
1284 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1287 *s = fxdr_unsigned(int32_t, *tl);
1288 if (*s > m || *s <= 0)
1294 nfsm_srvnamesiz_xx(int *s, int m, struct mbuf **md, caddr_t *dpos)
1298 NFSD_LOCK_DONTCARE();
1300 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1303 *s = fxdr_unsigned(int32_t, *tl);
1305 return NFSERR_NAMETOL;
1312 nfsm_srvnamesiz0_xx(int *s, int m, struct mbuf **md, caddr_t *dpos)
1316 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1319 *s = fxdr_unsigned(int32_t, *tl);
1321 return NFSERR_NAMETOL;
1328 nfsm_clget_xx(u_int32_t **tl, struct mbuf *mb, struct mbuf **mp,
1329 char **bp, char **be, caddr_t bpos)
1333 NFSD_UNLOCK_ASSERT();
1337 (*mp)->m_len += *bp - bpos;
1338 MGET(nmp, M_WAIT, MT_DATA);
1339 MCLGET(nmp, M_WAIT);
1340 nmp->m_len = NFSMSIZ(nmp);
1341 (*mp)->m_next = nmp;
1343 *bp = mtod(*mp, caddr_t);
1344 *be = *bp + (*mp)->m_len;
1346 *tl = (u_int32_t *)*bp;
1350 nfsm_srvmtofh_xx(fhandle_t *f, int v3, struct mbuf **md, caddr_t *dpos)
1356 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1359 fhlen = fxdr_unsigned(int, *tl);
1360 if (fhlen != 0 && fhlen != NFSX_V3FH)
1366 tl = nfsm_dissect_xx_nonblock(fhlen, md, dpos);
1369 bcopy((caddr_t)tl, (caddr_t)(f), fhlen);
1371 bzero((caddr_t)(f), NFSX_V3FH);
1377 nfsm_srvsattr_xx(struct vattr *a, struct mbuf **md, caddr_t *dpos)
1382 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1385 if (*tl == nfsrv_nfs_true) {
1386 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1389 (a)->va_mode = nfstov_mode(*tl);
1391 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1394 if (*tl == nfsrv_nfs_true) {
1395 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1398 (a)->va_uid = fxdr_unsigned(uid_t, *tl);
1400 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1403 if (*tl == nfsrv_nfs_true) {
1404 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1407 (a)->va_gid = fxdr_unsigned(gid_t, *tl);
1409 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1412 if (*tl == nfsrv_nfs_true) {
1413 tl = nfsm_dissect_xx_nonblock(2 * NFSX_UNSIGNED, md, dpos);
1416 (a)->va_size = fxdr_hyper(tl);
1418 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1421 switch (fxdr_unsigned(int, *tl)) {
1422 case NFSV3SATTRTIME_TOCLIENT:
1423 tl = nfsm_dissect_xx_nonblock(2 * NFSX_UNSIGNED, md, dpos);
1426 fxdr_nfsv3time(tl, &(a)->va_atime);
1429 case NFSV3SATTRTIME_TOSERVER:
1430 getnanotime(&(a)->va_atime);
1431 a->va_vaflags |= VA_UTIMES_NULL;
1434 tl = nfsm_dissect_xx_nonblock(NFSX_UNSIGNED, md, dpos);
1437 switch (fxdr_unsigned(int, *tl)) {
1438 case NFSV3SATTRTIME_TOCLIENT:
1439 tl = nfsm_dissect_xx_nonblock(2 * NFSX_UNSIGNED, md, dpos);
1442 fxdr_nfsv3time(tl, &(a)->va_mtime);
1443 a->va_vaflags &= ~VA_UTIMES_NULL;
1445 case NFSV3SATTRTIME_TOSERVER:
1446 getnanotime(&(a)->va_mtime);
1448 a->va_vaflags |= VA_UTIMES_NULL;