1d4c0424c8
sign on every directory exported via NFSv4 with NFSv4 ACLs enabled. Reviewed by: rmacklem@ MFC after: 1 month Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D3502
514 lines
14 KiB
C
514 lines
14 KiB
C
/*-
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* Copyright (c) 2009 Rick Macklem, University of Guelph
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifndef APPLEKEXT
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#include <fs/nfs/nfsport.h>
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extern int nfsrv_useacl;
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#endif
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static int nfsrv_acemasktoperm(u_int32_t acetype, u_int32_t mask, int owner,
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enum vtype type, acl_perm_t *permp);
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/*
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* Handle xdr for an ace.
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*/
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APPLESTATIC int
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nfsrv_dissectace(struct nfsrv_descript *nd, struct acl_entry *acep,
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int *aceerrp, int *acesizep, NFSPROC_T *p)
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{
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u_int32_t *tl;
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int len, gotid = 0, owner = 0, error = 0, aceerr = 0;
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u_char *name, namestr[NFSV4_SMALLSTR + 1];
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u_int32_t flag, mask, acetype;
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gid_t gid;
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uid_t uid;
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*aceerrp = 0;
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acep->ae_flags = 0;
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NFSM_DISSECT(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
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acetype = fxdr_unsigned(u_int32_t, *tl++);
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flag = fxdr_unsigned(u_int32_t, *tl++);
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mask = fxdr_unsigned(u_int32_t, *tl++);
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len = fxdr_unsigned(int, *tl);
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if (len < 0) {
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error = NFSERR_BADXDR;
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goto nfsmout;
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} else if (len == 0) {
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/* Netapp filers return a 0 length who for nil users */
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acep->ae_tag = ACL_UNDEFINED_TAG;
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acep->ae_id = ACL_UNDEFINED_ID;
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acep->ae_perm = (acl_perm_t)0;
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acep->ae_entry_type = ACL_ENTRY_TYPE_DENY;
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if (acesizep)
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*acesizep = 4 * NFSX_UNSIGNED;
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error = 0;
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goto nfsmout;
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}
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if (len > NFSV4_SMALLSTR)
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name = malloc(len + 1, M_NFSSTRING, M_WAITOK);
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else
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name = namestr;
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error = nfsrv_mtostr(nd, name, len);
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if (error) {
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if (len > NFSV4_SMALLSTR)
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free(name, M_NFSSTRING);
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goto nfsmout;
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}
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if (len == 6) {
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if (!NFSBCMP(name, "OWNER@", 6)) {
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acep->ae_tag = ACL_USER_OBJ;
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acep->ae_id = ACL_UNDEFINED_ID;
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owner = 1;
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gotid = 1;
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} else if (!NFSBCMP(name, "GROUP@", 6)) {
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acep->ae_tag = ACL_GROUP_OBJ;
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acep->ae_id = ACL_UNDEFINED_ID;
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gotid = 1;
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}
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} else if (len == 9 && !NFSBCMP(name, "EVERYONE@", 9)) {
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acep->ae_tag = ACL_EVERYONE;
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acep->ae_id = ACL_UNDEFINED_ID;
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gotid = 1;
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}
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if (gotid == 0) {
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if (flag & NFSV4ACE_IDENTIFIERGROUP) {
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acep->ae_tag = ACL_GROUP;
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aceerr = nfsv4_strtogid(nd, name, len, &gid, p);
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if (aceerr == 0)
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acep->ae_id = (uid_t)gid;
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} else {
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acep->ae_tag = ACL_USER;
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aceerr = nfsv4_strtouid(nd, name, len, &uid, p);
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if (aceerr == 0)
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acep->ae_id = uid;
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}
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}
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if (len > NFSV4_SMALLSTR)
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free(name, M_NFSSTRING);
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if (aceerr == 0) {
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/*
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* Handle the flags.
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*/
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flag &= ~NFSV4ACE_IDENTIFIERGROUP;
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if (flag & NFSV4ACE_FILEINHERIT) {
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flag &= ~NFSV4ACE_FILEINHERIT;
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acep->ae_flags |= ACL_ENTRY_FILE_INHERIT;
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}
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if (flag & NFSV4ACE_DIRECTORYINHERIT) {
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flag &= ~NFSV4ACE_DIRECTORYINHERIT;
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acep->ae_flags |= ACL_ENTRY_DIRECTORY_INHERIT;
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}
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if (flag & NFSV4ACE_NOPROPAGATEINHERIT) {
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flag &= ~NFSV4ACE_NOPROPAGATEINHERIT;
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acep->ae_flags |= ACL_ENTRY_NO_PROPAGATE_INHERIT;
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}
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if (flag & NFSV4ACE_INHERITONLY) {
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flag &= ~NFSV4ACE_INHERITONLY;
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acep->ae_flags |= ACL_ENTRY_INHERIT_ONLY;
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}
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if (flag & NFSV4ACE_SUCCESSFULACCESS) {
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flag &= ~NFSV4ACE_SUCCESSFULACCESS;
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acep->ae_flags |= ACL_ENTRY_SUCCESSFUL_ACCESS;
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}
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if (flag & NFSV4ACE_FAILEDACCESS) {
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flag &= ~NFSV4ACE_FAILEDACCESS;
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acep->ae_flags |= ACL_ENTRY_FAILED_ACCESS;
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}
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/*
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* Set ae_entry_type.
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*/
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if (acetype == NFSV4ACE_ALLOWEDTYPE)
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acep->ae_entry_type = ACL_ENTRY_TYPE_ALLOW;
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else if (acetype == NFSV4ACE_DENIEDTYPE)
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acep->ae_entry_type = ACL_ENTRY_TYPE_DENY;
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else if (acetype == NFSV4ACE_AUDITTYPE)
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acep->ae_entry_type = ACL_ENTRY_TYPE_AUDIT;
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else if (acetype == NFSV4ACE_ALARMTYPE)
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acep->ae_entry_type = ACL_ENTRY_TYPE_ALARM;
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else
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aceerr = NFSERR_ATTRNOTSUPP;
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}
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/*
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* Now, check for unsupported flag bits.
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*/
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if (aceerr == 0 && flag != 0)
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aceerr = NFSERR_ATTRNOTSUPP;
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/*
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* And turn the mask into perm bits.
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*/
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if (aceerr == 0)
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aceerr = nfsrv_acemasktoperm(acetype, mask, owner, VREG,
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&acep->ae_perm);
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*aceerrp = aceerr;
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if (acesizep)
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*acesizep = NFSM_RNDUP(len) + (4 * NFSX_UNSIGNED);
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error = 0;
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nfsmout:
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NFSEXITCODE(error);
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return (error);
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}
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/*
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* Turn an NFSv4 ace mask into R/W/X flag bits.
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*/
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static int
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nfsrv_acemasktoperm(u_int32_t acetype, u_int32_t mask, int owner,
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enum vtype type, acl_perm_t *permp)
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{
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acl_perm_t perm = 0x0;
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int error = 0;
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if (mask & NFSV4ACE_READDATA) {
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mask &= ~NFSV4ACE_READDATA;
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perm |= ACL_READ_DATA;
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}
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if (mask & NFSV4ACE_LISTDIRECTORY) {
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mask &= ~NFSV4ACE_LISTDIRECTORY;
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perm |= ACL_LIST_DIRECTORY;
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}
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if (mask & NFSV4ACE_WRITEDATA) {
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mask &= ~NFSV4ACE_WRITEDATA;
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perm |= ACL_WRITE_DATA;
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}
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if (mask & NFSV4ACE_ADDFILE) {
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mask &= ~NFSV4ACE_ADDFILE;
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perm |= ACL_ADD_FILE;
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}
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if (mask & NFSV4ACE_APPENDDATA) {
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mask &= ~NFSV4ACE_APPENDDATA;
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perm |= ACL_APPEND_DATA;
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}
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if (mask & NFSV4ACE_ADDSUBDIRECTORY) {
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mask &= ~NFSV4ACE_ADDSUBDIRECTORY;
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perm |= ACL_ADD_SUBDIRECTORY;
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}
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if (mask & NFSV4ACE_READNAMEDATTR) {
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mask &= ~NFSV4ACE_READNAMEDATTR;
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perm |= ACL_READ_NAMED_ATTRS;
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}
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if (mask & NFSV4ACE_WRITENAMEDATTR) {
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mask &= ~NFSV4ACE_WRITENAMEDATTR;
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perm |= ACL_WRITE_NAMED_ATTRS;
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}
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if (mask & NFSV4ACE_EXECUTE) {
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mask &= ~NFSV4ACE_EXECUTE;
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perm |= ACL_EXECUTE;
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}
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if (mask & NFSV4ACE_SEARCH) {
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mask &= ~NFSV4ACE_SEARCH;
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perm |= ACL_EXECUTE;
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}
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if (mask & NFSV4ACE_DELETECHILD) {
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mask &= ~NFSV4ACE_DELETECHILD;
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perm |= ACL_DELETE_CHILD;
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}
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if (mask & NFSV4ACE_READATTRIBUTES) {
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mask &= ~NFSV4ACE_READATTRIBUTES;
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perm |= ACL_READ_ATTRIBUTES;
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}
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if (mask & NFSV4ACE_WRITEATTRIBUTES) {
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mask &= ~NFSV4ACE_WRITEATTRIBUTES;
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perm |= ACL_WRITE_ATTRIBUTES;
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}
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if (mask & NFSV4ACE_DELETE) {
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mask &= ~NFSV4ACE_DELETE;
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perm |= ACL_DELETE;
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}
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if (mask & NFSV4ACE_READACL) {
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mask &= ~NFSV4ACE_READACL;
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perm |= ACL_READ_ACL;
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}
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if (mask & NFSV4ACE_WRITEACL) {
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mask &= ~NFSV4ACE_WRITEACL;
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perm |= ACL_WRITE_ACL;
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}
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if (mask & NFSV4ACE_WRITEOWNER) {
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mask &= ~NFSV4ACE_WRITEOWNER;
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perm |= ACL_WRITE_OWNER;
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}
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if (mask & NFSV4ACE_SYNCHRONIZE) {
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mask &= ~NFSV4ACE_SYNCHRONIZE;
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perm |= ACL_SYNCHRONIZE;
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}
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if (mask != 0) {
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error = NFSERR_ATTRNOTSUPP;
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goto out;
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}
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*permp = perm;
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out:
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NFSEXITCODE(error);
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return (error);
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}
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/* local functions */
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static int nfsrv_buildace(struct nfsrv_descript *, u_char *, int,
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enum vtype, int, int, struct acl_entry *);
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/*
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* This function builds an NFS ace.
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*/
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static int
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nfsrv_buildace(struct nfsrv_descript *nd, u_char *name, int namelen,
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enum vtype type, int group, int owner, struct acl_entry *ace)
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{
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u_int32_t *tl, aceflag = 0x0, acemask = 0x0, acetype;
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int full_len;
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full_len = NFSM_RNDUP(namelen);
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NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED + full_len);
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/*
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* Fill in the ace type.
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*/
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if (ace->ae_entry_type & ACL_ENTRY_TYPE_ALLOW)
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acetype = NFSV4ACE_ALLOWEDTYPE;
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else if (ace->ae_entry_type & ACL_ENTRY_TYPE_DENY)
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acetype = NFSV4ACE_DENIEDTYPE;
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else if (ace->ae_entry_type & ACL_ENTRY_TYPE_AUDIT)
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acetype = NFSV4ACE_AUDITTYPE;
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else
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acetype = NFSV4ACE_ALARMTYPE;
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*tl++ = txdr_unsigned(acetype);
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/*
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* Set the flag bits from the ACL.
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*/
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if (ace->ae_flags & ACL_ENTRY_FILE_INHERIT)
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aceflag |= NFSV4ACE_FILEINHERIT;
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if (ace->ae_flags & ACL_ENTRY_DIRECTORY_INHERIT)
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aceflag |= NFSV4ACE_DIRECTORYINHERIT;
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if (ace->ae_flags & ACL_ENTRY_NO_PROPAGATE_INHERIT)
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aceflag |= NFSV4ACE_NOPROPAGATEINHERIT;
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if (ace->ae_flags & ACL_ENTRY_INHERIT_ONLY)
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aceflag |= NFSV4ACE_INHERITONLY;
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if (ace->ae_flags & ACL_ENTRY_SUCCESSFUL_ACCESS)
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aceflag |= NFSV4ACE_SUCCESSFULACCESS;
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if (ace->ae_flags & ACL_ENTRY_FAILED_ACCESS)
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aceflag |= NFSV4ACE_FAILEDACCESS;
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if (group)
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aceflag |= NFSV4ACE_IDENTIFIERGROUP;
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*tl++ = txdr_unsigned(aceflag);
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if (type == VDIR) {
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if (ace->ae_perm & ACL_LIST_DIRECTORY)
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acemask |= NFSV4ACE_LISTDIRECTORY;
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if (ace->ae_perm & ACL_ADD_FILE)
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acemask |= NFSV4ACE_ADDFILE;
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if (ace->ae_perm & ACL_ADD_SUBDIRECTORY)
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acemask |= NFSV4ACE_ADDSUBDIRECTORY;
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if (ace->ae_perm & ACL_READ_NAMED_ATTRS)
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acemask |= NFSV4ACE_READNAMEDATTR;
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if (ace->ae_perm & ACL_WRITE_NAMED_ATTRS)
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acemask |= NFSV4ACE_WRITENAMEDATTR;
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if (ace->ae_perm & ACL_EXECUTE)
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acemask |= NFSV4ACE_SEARCH;
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if (ace->ae_perm & ACL_DELETE_CHILD)
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acemask |= NFSV4ACE_DELETECHILD;
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if (ace->ae_perm & ACL_READ_ATTRIBUTES)
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acemask |= NFSV4ACE_READATTRIBUTES;
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if (ace->ae_perm & ACL_WRITE_ATTRIBUTES)
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acemask |= NFSV4ACE_WRITEATTRIBUTES;
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if (ace->ae_perm & ACL_DELETE)
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acemask |= NFSV4ACE_DELETE;
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if (ace->ae_perm & ACL_READ_ACL)
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acemask |= NFSV4ACE_READACL;
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if (ace->ae_perm & ACL_WRITE_ACL)
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acemask |= NFSV4ACE_WRITEACL;
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if (ace->ae_perm & ACL_WRITE_OWNER)
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acemask |= NFSV4ACE_WRITEOWNER;
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if (ace->ae_perm & ACL_SYNCHRONIZE)
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acemask |= NFSV4ACE_SYNCHRONIZE;
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} else {
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if (ace->ae_perm & ACL_READ_DATA)
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acemask |= NFSV4ACE_READDATA;
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if (ace->ae_perm & ACL_WRITE_DATA)
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acemask |= NFSV4ACE_WRITEDATA;
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if (ace->ae_perm & ACL_APPEND_DATA)
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acemask |= NFSV4ACE_APPENDDATA;
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if (ace->ae_perm & ACL_READ_NAMED_ATTRS)
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acemask |= NFSV4ACE_READNAMEDATTR;
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if (ace->ae_perm & ACL_WRITE_NAMED_ATTRS)
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acemask |= NFSV4ACE_WRITENAMEDATTR;
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if (ace->ae_perm & ACL_EXECUTE)
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acemask |= NFSV4ACE_EXECUTE;
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if (ace->ae_perm & ACL_READ_ATTRIBUTES)
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acemask |= NFSV4ACE_READATTRIBUTES;
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if (ace->ae_perm & ACL_WRITE_ATTRIBUTES)
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acemask |= NFSV4ACE_WRITEATTRIBUTES;
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if (ace->ae_perm & ACL_DELETE)
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acemask |= NFSV4ACE_DELETE;
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if (ace->ae_perm & ACL_READ_ACL)
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acemask |= NFSV4ACE_READACL;
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if (ace->ae_perm & ACL_WRITE_ACL)
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acemask |= NFSV4ACE_WRITEACL;
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if (ace->ae_perm & ACL_WRITE_OWNER)
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acemask |= NFSV4ACE_WRITEOWNER;
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if (ace->ae_perm & ACL_SYNCHRONIZE)
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acemask |= NFSV4ACE_SYNCHRONIZE;
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}
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*tl++ = txdr_unsigned(acemask);
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*tl++ = txdr_unsigned(namelen);
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if (full_len - namelen)
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*(tl + (namelen / NFSX_UNSIGNED)) = 0x0;
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NFSBCOPY(name, (caddr_t)tl, namelen);
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return (full_len + 4 * NFSX_UNSIGNED);
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}
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/*
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* Build an NFSv4 ACL.
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*/
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APPLESTATIC int
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nfsrv_buildacl(struct nfsrv_descript *nd, NFSACL_T *aclp, enum vtype type,
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NFSPROC_T *p)
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{
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int i, entrycnt = 0, retlen;
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u_int32_t *entrycntp;
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int isowner, isgroup, namelen, malloced;
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u_char *name, namestr[NFSV4_SMALLSTR];
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NFSM_BUILD(entrycntp, u_int32_t *, NFSX_UNSIGNED);
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retlen = NFSX_UNSIGNED;
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/*
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* Loop through the acl entries, building each one.
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*/
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for (i = 0; i < aclp->acl_cnt; i++) {
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isowner = isgroup = malloced = 0;
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switch (aclp->acl_entry[i].ae_tag) {
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case ACL_USER_OBJ:
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isowner = 1;
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name = "OWNER@";
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namelen = 6;
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break;
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case ACL_GROUP_OBJ:
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isgroup = 1;
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name = "GROUP@";
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namelen = 6;
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break;
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case ACL_EVERYONE:
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name = "EVERYONE@";
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namelen = 9;
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break;
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case ACL_USER:
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name = namestr;
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nfsv4_uidtostr(aclp->acl_entry[i].ae_id, &name,
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&namelen, p);
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if (name != namestr)
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malloced = 1;
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break;
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case ACL_GROUP:
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isgroup = 1;
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name = namestr;
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nfsv4_gidtostr((gid_t)aclp->acl_entry[i].ae_id, &name,
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&namelen, p);
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if (name != namestr)
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malloced = 1;
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break;
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default:
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continue;
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};
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retlen += nfsrv_buildace(nd, name, namelen, type, isgroup,
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isowner, &aclp->acl_entry[i]);
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entrycnt++;
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if (malloced)
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free(name, M_NFSSTRING);
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}
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*entrycntp = txdr_unsigned(entrycnt);
|
|
return (retlen);
|
|
}
|
|
|
|
/*
|
|
* Set an NFSv4 acl.
|
|
*/
|
|
APPLESTATIC int
|
|
nfsrv_setacl(vnode_t vp, NFSACL_T *aclp, struct ucred *cred,
|
|
NFSPROC_T *p)
|
|
{
|
|
int error;
|
|
|
|
if (nfsrv_useacl == 0 || nfs_supportsnfsv4acls(vp) == 0) {
|
|
error = NFSERR_ATTRNOTSUPP;
|
|
goto out;
|
|
}
|
|
/*
|
|
* With NFSv4 ACLs, chmod(2) may need to add additional entries.
|
|
* Make sure it has enough room for that - splitting every entry
|
|
* into two and appending "canonical six" entries at the end.
|
|
* Cribbed out of kern/vfs_acl.c - Rick M.
|
|
*/
|
|
if (aclp->acl_cnt > (ACL_MAX_ENTRIES - 6) / 2) {
|
|
error = NFSERR_ATTRNOTSUPP;
|
|
goto out;
|
|
}
|
|
error = VOP_SETACL(vp, ACL_TYPE_NFS4, aclp, cred, p);
|
|
|
|
out:
|
|
NFSEXITCODE(error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Compare two NFSv4 acls.
|
|
* Return 0 if they are the same, 1 if not the same.
|
|
*/
|
|
APPLESTATIC int
|
|
nfsrv_compareacl(NFSACL_T *aclp1, NFSACL_T *aclp2)
|
|
{
|
|
int i;
|
|
struct acl_entry *acep1, *acep2;
|
|
|
|
if (aclp1->acl_cnt != aclp2->acl_cnt)
|
|
return (1);
|
|
acep1 = aclp1->acl_entry;
|
|
acep2 = aclp2->acl_entry;
|
|
for (i = 0; i < aclp1->acl_cnt; i++) {
|
|
if (acep1->ae_tag != acep2->ae_tag)
|
|
return (1);
|
|
switch (acep1->ae_tag) {
|
|
case ACL_GROUP:
|
|
case ACL_USER:
|
|
if (acep1->ae_id != acep2->ae_id)
|
|
return (1);
|
|
/* fall through */
|
|
case ACL_USER_OBJ:
|
|
case ACL_GROUP_OBJ:
|
|
case ACL_OTHER:
|
|
if (acep1->ae_perm != acep2->ae_perm)
|
|
return (1);
|
|
};
|
|
acep1++;
|
|
acep2++;
|
|
}
|
|
return (0);
|
|
}
|