+++ /dev/null
-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License version 2 for more details (a copy is included
- * in the LICENSE file that accompanied this code).
- *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- *
- * Copyright (c) 2012, 2013, Intel Corporation.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- *
- * lustre/mdt/mdt_idmap.c
- *
- * Author: Lai Siyao <lsy@clusterfs.com>
- * Author: Fan Yong <fanyong@clusterfs.com>
- */
-
-#define DEBUG_SUBSYSTEM S_MDS
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/kmod.h>
-#include <linux/user_namespace.h>
-#ifdef HAVE_UIDGID_HEADER
-# include <linux/uidgid.h>
-#endif
-#include <linux/string.h>
-#include <linux/stat.h>
-#include <linux/errno.h>
-#include <linux/version.h>
-#include <linux/unistd.h>
-#include <asm/uaccess.h>
-#include <linux/fs.h>
-#include <linux/stat.h>
-#include <asm/uaccess.h>
-#include <linux/slab.h>
-
-#include <libcfs/libcfs.h>
-#include <obd.h>
-#include <obd_class.h>
-#include <obd_support.h>
-#include <lustre_net.h>
-#include <lustre_import.h>
-#include <lustre_dlm.h>
-#include <lustre_sec.h>
-#include <lustre_lib.h>
-
-#include "mdt_internal.h"
-
-int mdt_init_idmap(struct tgt_session_info *tsi)
-{
- struct ptlrpc_request *req = tgt_ses_req(tsi);
- struct mdt_export_data *med = mdt_req2med(req);
- struct obd_export *exp = req->rq_export;
- char *client = libcfs_nid2str(req->rq_peer.nid);
- int rc = 0;
- ENTRY;
-
- if (exp_connect_rmtclient(exp)) {
- mutex_lock(&med->med_idmap_mutex);
- if (!med->med_idmap)
- med->med_idmap = lustre_idmap_init();
- mutex_unlock(&med->med_idmap_mutex);
-
- if (IS_ERR(med->med_idmap)) {
- long err = PTR_ERR(med->med_idmap);
-
- med->med_idmap = NULL;
- CERROR("%s: client %s -> target %s "
- "failed to init idmap [%ld]!\n",
- tgt_name(tsi->tsi_tgt), client,
- tgt_name(tsi->tsi_tgt), err);
- RETURN(err);
- } else if (!med->med_idmap) {
- CERROR("%s: client %s -> target %s "
- "failed to init(2) idmap!\n",
- tgt_name(tsi->tsi_tgt), client,
- tgt_name(tsi->tsi_tgt));
- RETURN(-ENOMEM);
- }
-
- CDEBUG(D_SEC, "%s: client %s -> target %s is remote.\n",
- tgt_name(tsi->tsi_tgt), client,
- tgt_name(tsi->tsi_tgt));
- /* NB, MDS_CONNECT establish root idmap too! */
- rc = mdt_handle_idmap(tsi);
- }
- RETURN(rc);
-}
-
-void mdt_cleanup_idmap(struct mdt_export_data *med)
-{
- mutex_lock(&med->med_idmap_mutex);
- if (med->med_idmap != NULL) {
- lustre_idmap_fini(med->med_idmap);
- med->med_idmap = NULL;
- }
- mutex_unlock(&med->med_idmap_mutex);
-}
-
-static inline void mdt_revoke_export_locks(struct obd_export *exp)
-{
- /* don't revoke locks during recovery */
- if (exp->exp_obd->obd_recovering)
- return;
-
- ldlm_revoke_export_locks(exp);
-}
-
-int mdt_handle_idmap(struct tgt_session_info *tsi)
-{
- struct ptlrpc_request *req = tgt_ses_req(tsi);
- struct mdt_device *mdt = mdt_exp2dev(req->rq_export);
- struct mdt_export_data *med;
- struct ptlrpc_user_desc *pud = req->rq_user_desc;
- struct md_identity *identity;
- __u32 opc;
- int rc = 0;
- ENTRY;
-
- if (!req->rq_export)
- RETURN(0);
-
- med = mdt_req2med(req);
- if (!exp_connect_rmtclient(req->rq_export))
- RETURN(0);
-
- opc = lustre_msg_get_opc(req->rq_reqmsg);
- /* Bypass other opc */
- if ((opc != SEC_CTX_INIT) && (opc != SEC_CTX_INIT_CONT) &&
- (opc != SEC_CTX_FINI) && (opc != MDS_CONNECT))
- RETURN(0);
-
- LASSERT(med->med_idmap);
-
- if (unlikely(!pud)) {
- CDEBUG(D_SEC, "remote client must run with rq_user_desc "
- "present\n");
- RETURN(-EACCES);
- }
-
- if (!uid_valid(make_kuid(&init_user_ns, req->rq_auth_mapped_uid))) {
- CDEBUG(D_SEC, "invalid authorized mapped uid, please check "
- "/etc/lustre/idmap.conf!\n");
- RETURN(-EACCES);
- }
-
- if (is_identity_get_disabled(mdt->mdt_identity_cache)) {
- CDEBUG(D_SEC, "remote client must run with identity_get "
- "enabled!\n");
- RETURN(-EACCES);
- }
-
- identity = mdt_identity_get(mdt->mdt_identity_cache,
- req->rq_auth_mapped_uid);
- if (IS_ERR(identity)) {
- CDEBUG(D_SEC, "can't get mdt identity(%u), no mapping added\n",
- req->rq_auth_mapped_uid);
- RETURN(-EACCES);
- }
-
- switch (opc) {
- case SEC_CTX_INIT:
- case SEC_CTX_INIT_CONT:
- case MDS_CONNECT:
- rc = lustre_idmap_add(med->med_idmap,
- pud->pud_uid, identity->mi_uid,
- pud->pud_gid, identity->mi_gid);
- break;
- case SEC_CTX_FINI:
- rc = lustre_idmap_del(med->med_idmap,
- pud->pud_uid, identity->mi_uid,
- pud->pud_gid, identity->mi_gid);
- break;
- }
-
- mdt_identity_put(mdt->mdt_identity_cache, identity);
-
- if (rc)
- RETURN(rc);
-
- switch (opc) {
- case SEC_CTX_INIT:
- case SEC_CTX_INIT_CONT:
- case SEC_CTX_FINI:
- mdt_revoke_export_locks(req->rq_export);
- break;
- }
-
- RETURN(0);
-}
-
-int ptlrpc_user_desc_do_idmap(struct ptlrpc_request *req,
- struct ptlrpc_user_desc *pud)
-{
- struct mdt_export_data *med = mdt_req2med(req);
- struct lustre_idmap_table *idmap = med->med_idmap;
- uid_t uid, fsuid;
- gid_t gid, fsgid;
-
- /* Only remote client need desc_to_idmap. */
- if (!exp_connect_rmtclient(req->rq_export))
- return 0;
-
- uid = lustre_idmap_lookup_uid(NULL, idmap, 0, pud->pud_uid);
- if (uid == CFS_IDMAP_NOTFOUND) {
- CDEBUG(D_SEC, "no mapping for uid %u\n", pud->pud_uid);
- return -EACCES;
- }
-
- if (pud->pud_uid == pud->pud_fsuid) {
- fsuid = uid;
- } else {
- fsuid = lustre_idmap_lookup_uid(NULL, idmap, 0, pud->pud_fsuid);
- if (fsuid == CFS_IDMAP_NOTFOUND) {
- CDEBUG(D_SEC, "no mapping for fsuid %u\n",
- pud->pud_fsuid);
- return -EACCES;
- }
- }
-
- gid = lustre_idmap_lookup_gid(NULL, idmap, 0, pud->pud_gid);
- if (gid == CFS_IDMAP_NOTFOUND) {
- CDEBUG(D_SEC, "no mapping for gid %u\n", pud->pud_gid);
- return -EACCES;
- }
-
- if (pud->pud_gid == pud->pud_fsgid) {
- fsgid = gid;
- } else {
- fsgid = lustre_idmap_lookup_gid(NULL, idmap, 0, pud->pud_fsgid);
- if (fsgid == CFS_IDMAP_NOTFOUND) {
- CDEBUG(D_SEC, "no mapping for fsgid %u\n",
- pud->pud_fsgid);
- return -EACCES;
- }
- }
-
- pud->pud_uid = uid;
- pud->pud_gid = gid;
- pud->pud_fsuid = fsuid;
- pud->pud_fsgid = fsgid;
-
- return 0;
-}
-
-/*
- * Reverse mapping
- */
-void mdt_body_reverse_idmap(struct mdt_thread_info *info, struct mdt_body *body)
-{
- struct ptlrpc_request *req = mdt_info_req(info);
- struct lu_ucred *uc = mdt_ucred(info);
- struct mdt_export_data *med = mdt_req2med(req);
- struct lustre_idmap_table *idmap = med->med_idmap;
-
- if (!exp_connect_rmtclient(info->mti_exp))
- return;
-
- if (body->mbo_valid & OBD_MD_FLUID) {
- uid_t uid;
-
- uid = lustre_idmap_lookup_uid(uc, idmap, 1, body->mbo_uid);
-
- if (uid == CFS_IDMAP_NOTFOUND) {
- uid = NOBODY_UID;
- if (body->mbo_valid & OBD_MD_FLMODE)
- body->mbo_mode = (body->mbo_mode & ~S_IRWXU) |
- ((body->mbo_mode & S_IRWXO) << 6);
- }
-
- body->mbo_uid = uid;
- }
-
- if (body->mbo_valid & OBD_MD_FLGID) {
- gid_t gid;
-
- gid = lustre_idmap_lookup_gid(uc, idmap, 1, body->mbo_gid);
-
- if (gid == CFS_IDMAP_NOTFOUND) {
- gid = NOBODY_GID;
- if (body->mbo_valid & OBD_MD_FLMODE)
- body->mbo_mode = (body->mbo_mode & ~S_IRWXG) |
- ((body->mbo_mode & S_IRWXO) << 3);
- }
-
- body->mbo_gid = gid;
- }
-}
-
-/* Do not ignore root_squash for non-setattr case. */
-int mdt_fix_attr_ucred(struct mdt_thread_info *info, __u32 op)
-{
- struct ptlrpc_request *req = mdt_info_req(info);
- struct lu_ucred *uc = mdt_ucred_check(info);
- struct lu_attr *attr = &info->mti_attr.ma_attr;
- struct mdt_export_data *med = mdt_req2med(req);
- struct lustre_idmap_table *idmap = med->med_idmap;
-
- if (uc == NULL)
- return -EINVAL;
-
- if (op != REINT_SETATTR) {
- if ((attr->la_valid & LA_UID) && (attr->la_uid != -1))
- attr->la_uid = uc->uc_fsuid;
- /* for S_ISGID, inherit gid from his parent, such work will be
- * done in cmm/mdd layer, here set all cases as uc->uc_fsgid. */
- if ((attr->la_valid & LA_GID) && (attr->la_gid != -1))
- attr->la_gid = uc->uc_fsgid;
- } else if (exp_connect_rmtclient(info->mti_exp)) {
- /* NB: -1 case will be handled by mdt_fix_attr() later. */
- if ((attr->la_valid & LA_UID) && (attr->la_uid != -1)) {
- uid_t uid = lustre_idmap_lookup_uid(uc, idmap, 0,
- attr->la_uid);
-
- if (uid == CFS_IDMAP_NOTFOUND) {
- CDEBUG(D_SEC, "Deny chown to uid %u\n",
- attr->la_uid);
- return -EPERM;
- }
-
- attr->la_uid = uid;
- }
- if ((attr->la_valid & LA_GID) && (attr->la_gid != -1)) {
- gid_t gid = lustre_idmap_lookup_gid(uc, idmap, 0,
- attr->la_gid);
-
- if (gid == CFS_IDMAP_NOTFOUND) {
- CDEBUG(D_SEC, "Deny chown to gid %u\n",
- attr->la_gid);
- return -EPERM;
- }
-
- attr->la_gid = gid;
- }
- }
-
- return 0;
-}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff