-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* 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.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2012, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Author: fangyong@clusterfs.com
* Author: lsy@clusterfs.com
*/
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
+
#define DEBUG_SUBSYSTEM S_MDS
-#include <linux/module.h>
-#include <linux/jbd.h>
-#include <obd.h>
#include <obd_class.h>
-#include <lustre_ver.h>
-#include <obd_support.h>
#include <lprocfs_status.h>
-
-#include <linux/ldiskfs_fs.h>
#include <lustre_mds.h>
-#include <lustre/lustre_idl.h>
-
+#include <lustre_idmap.h>
#include "mdd_internal.h"
#ifdef CONFIG_FS_POSIX_ACL
/*
- * Get default acl EA only.
- * Hold read_lock for mdd_obj.
+ * Hold write_lock for o.
*/
-int mdd_def_acl_get(const struct lu_env *env, struct mdd_object *mdd_obj,
- struct md_attr *ma)
+int mdd_acl_chmod(const struct lu_env *env, struct mdd_object *o, __u32 mode,
+ struct thandle *handle)
{
- struct lu_buf *buf;
- int rc;
- ENTRY;
-
- if (ma->ma_valid & MA_ACL_DEF)
- RETURN(0);
-
- buf = mdd_buf_get(env, ma->ma_acl, ma->ma_acl_size);
- rc = mdo_xattr_get(env, mdd_obj, buf, XATTR_NAME_ACL_DEFAULT,
- BYPASS_CAPA);
- if (rc > 0) {
- ma->ma_acl_size = rc;
- ma->ma_valid |= MA_ACL_DEF;
- rc = 0;
- } else if ((rc == -EOPNOTSUPP) || (rc == -ENODATA)) {
- rc = 0;
- }
- RETURN(rc);
+ struct lu_buf buf;
+ posix_acl_xattr_header *head;
+ posix_acl_xattr_entry *entry;
+ int entry_count;
+ int rc;
+
+ ENTRY;
+
+ lu_buf_check_and_alloc(&mdd_env_info(env)->mti_xattr_buf,
+ MIN(mdd_obj2mdd_dev(o)->mdd_dt_conf.ddp_max_ea_size,
+ XATTR_SIZE_MAX));
+ buf = mdd_env_info(env)->mti_xattr_buf;
+ if (buf.lb_buf == NULL)
+ RETURN(-ENOMEM);
+
+ if (buf.lb_len > XATTR_SIZE_MAX)
+ buf.lb_len = XATTR_SIZE_MAX;
+
+ rc = mdo_xattr_get(env, o, &buf, XATTR_NAME_ACL_ACCESS);
+ if ((rc == -EOPNOTSUPP) || (rc == -ENODATA))
+ RETURN(0);
+ else if (rc <= 0)
+ RETURN(rc);
+
+ buf.lb_len = rc;
+ head = (posix_acl_xattr_header *)(buf.lb_buf);
+ entry = GET_POSIX_ACL_XATTR_ENTRY(head);
+ entry_count = (buf.lb_len - sizeof(head->a_version)) /
+ sizeof(posix_acl_xattr_entry);
+ if (entry_count <= 0)
+ RETURN(0);
+
+ rc = lustre_posix_acl_chmod_masq(entry, mode, entry_count);
+ if (rc)
+ RETURN(rc);
+
+ rc = mdo_xattr_set(env, o, &buf, XATTR_NAME_ACL_ACCESS,
+ 0, handle);
+ RETURN(rc);
}
-/*
- * Hold write_lock for o.
- */
-int mdd_acl_chmod(const struct lu_env *env, struct mdd_object *o, __u32 mode,
- struct thandle *handle)
+int mdd_acl_set(const struct lu_env *env, struct mdd_object *obj,
+ struct lu_attr *la, const struct lu_buf *buf, int fl)
{
- struct lu_buf *buf;
- posix_acl_xattr_header *head;
- posix_acl_xattr_entry *entry;
- int entry_count;
- int rc;
-
- ENTRY;
-
- buf = mdd_buf_get(env, mdd_env_info(env)->mti_xattr_buf,
- sizeof(mdd_env_info(env)->mti_xattr_buf));
-
- rc = mdo_xattr_get(env, o, buf, XATTR_NAME_ACL_ACCESS, BYPASS_CAPA);
- if ((rc == -EOPNOTSUPP) || (rc == -ENODATA))
- RETURN(0);
- else if (rc <= 0)
- RETURN(rc);
-
- buf->lb_len = rc;
- head = (posix_acl_xattr_header *)(buf->lb_buf);
- entry = head->a_entries;
- entry_count = (buf->lb_len - sizeof(head->a_version)) /
- sizeof(posix_acl_xattr_entry);
- if (entry_count <= 0)
- RETURN(0);
-
- rc = lustre_posix_acl_chmod_masq(entry, mode, entry_count);
- if (rc)
- RETURN(rc);
-
- rc = mdo_xattr_set(env, o, buf, XATTR_NAME_ACL_ACCESS,
- 0, handle, BYPASS_CAPA);
- RETURN(rc);
+ struct mdd_device *mdd = mdd_obj2mdd_dev(obj);
+ struct thandle *handle;
+ posix_acl_xattr_header *head;
+ posix_acl_xattr_entry *entry;
+ int entry_count;
+ bool not_equiv, mode_change;
+ mode_t mode;
+ int rc;
+ ENTRY;
+
+ head = (posix_acl_xattr_header *)(buf->lb_buf);
+ entry = GET_POSIX_ACL_XATTR_ENTRY(head);
+ entry_count = (buf->lb_len - sizeof(head->a_version)) /
+ sizeof(posix_acl_xattr_entry);
+ if (entry_count <= 0)
+ RETURN(0);
+
+ LASSERT(la->la_valid & LA_MODE);
+ mode = la->la_mode;
+ rc = lustre_posix_acl_equiv_mode(entry, &mode, entry_count);
+ if (rc < 0)
+ RETURN(rc);
+
+ not_equiv = (rc > 0);
+ mode_change = (mode != la->la_mode);
+
+ handle = mdd_trans_create(env, mdd);
+ if (IS_ERR(handle))
+ RETURN(PTR_ERR(handle));
+
+ /* rc tells whether ACL can be represented by i_mode only */
+ if (not_equiv)
+ rc = mdo_declare_xattr_set(env, obj, buf,
+ XATTR_NAME_ACL_ACCESS, fl, handle);
+ else
+ rc = mdo_declare_xattr_del(env, obj, XATTR_NAME_ACL_ACCESS,
+ handle);
+ if (rc)
+ GOTO(stop, rc);
+
+ if (mode_change) {
+ la->la_mode = mode;
+ la->la_valid = LA_MODE;
+ rc = mdo_declare_attr_set(env, obj, la, handle);
+ }
+
+ rc = mdd_trans_start(env, mdd, handle);
+ if (rc)
+ GOTO(stop, rc);
+
+ mdd_write_lock(env, obj, DT_TGT_CHILD);
+ /* whether ACL can be represented by i_mode only */
+ if (not_equiv)
+ rc = mdo_xattr_set(env, obj, buf, XATTR_NAME_ACL_ACCESS, fl,
+ handle);
+ else
+ rc = mdo_xattr_del(env, obj, XATTR_NAME_ACL_ACCESS, handle);
+ if (rc)
+ GOTO(unlock, rc);
+
+ if (mode_change)
+ rc = mdo_attr_set(env, obj, la, handle);
+
+ /* security-replated changes may require sync */
+ if (S_ISDIR(mdd_object_type(obj)))
+ handle->th_sync |= !!mdd->mdd_sync_permission;
+unlock:
+ mdd_write_unlock(env, obj);
+stop:
+ rc = mdd_trans_stop(env, mdd, rc, handle);
+
+ RETURN(rc);
}
-/*
- * Hold write_lock for obj.
- */
-int __mdd_acl_init(const struct lu_env *env, struct mdd_object *obj,
- struct lu_buf *buf, __u32 *mode, struct thandle *handle)
+/**
+ * Fix mode and ACL according to the default ACL(buf)
+ * \retval = 0 ACL does not need to be reset.
+ * \retval = 1 ACL needs to be reset.
+ * \retval < 0 error.
+ **/
+int __mdd_fix_mode_acl(const struct lu_env *env, struct lu_buf *buf,
+ __u32 *mode)
{
- posix_acl_xattr_header *head;
- posix_acl_xattr_entry *entry;
- int entry_count;
- int rc;
-
- ENTRY;
-
- head = (posix_acl_xattr_header *)(buf->lb_buf);
- entry = head->a_entries;
- entry_count = (buf->lb_len - sizeof(head->a_version)) /
- sizeof(posix_acl_xattr_entry);
- if (entry_count <= 0)
- RETURN(0);
-
- if (S_ISDIR(*mode)) {
- rc = mdo_xattr_set(env, obj, buf, XATTR_NAME_ACL_DEFAULT, 0,
- handle, BYPASS_CAPA);
- if (rc)
- RETURN(rc);
- }
+ posix_acl_xattr_header *head;
+ posix_acl_xattr_entry *entry;
+ int entry_count;
+ int rc;
+
+ ENTRY;
- rc = lustre_posix_acl_create_masq(entry, mode, entry_count);
- if (rc <= 0)
- RETURN(rc);
+ head = (posix_acl_xattr_header *)(buf->lb_buf);
+ entry = GET_POSIX_ACL_XATTR_ENTRY(head);
+ entry_count = (buf->lb_len - sizeof(head->a_version)) /
+ sizeof(posix_acl_xattr_entry);
+ if (entry_count <= 0)
+ RETURN(0);
- rc = mdo_xattr_set(env, obj, buf, XATTR_NAME_ACL_ACCESS, 0, handle,
- BYPASS_CAPA);
- RETURN(rc);
+ rc = lustre_posix_acl_create_masq(entry, mode, entry_count);
+
+ RETURN(rc);
}
+
#endif
/*
* Hold read_lock for obj.
*/
static int mdd_check_acl(const struct lu_env *env, struct mdd_object *obj,
- struct lu_attr *la, int mask)
+ const struct lu_attr *la, int mask)
{
#ifdef CONFIG_FS_POSIX_ACL
- struct md_ucred *uc = md_ucred(env);
- posix_acl_xattr_header *head;
- posix_acl_xattr_entry *entry;
- struct lu_buf *buf;
- int entry_count;
- int rc;
- ENTRY;
-
- buf = mdd_buf_get(env, mdd_env_info(env)->mti_xattr_buf,
- sizeof(mdd_env_info(env)->mti_xattr_buf));
- rc = mdo_xattr_get(env, obj, buf, XATTR_NAME_ACL_ACCESS,
- mdd_object_capa(env, obj));
- if (rc <= 0)
- RETURN(rc ? : -EACCES);
-
- buf->lb_len = rc;
- head = (posix_acl_xattr_header *)(buf->lb_buf);
- entry = head->a_entries;
- entry_count = (buf->lb_len - sizeof(head->a_version)) /
- sizeof(posix_acl_xattr_entry);
-
- rc = lustre_posix_acl_permission(uc, la, mask, entry, entry_count);
- RETURN(rc);
+ struct lu_ucred *uc = lu_ucred_assert(env);
+ posix_acl_xattr_header *head;
+ posix_acl_xattr_entry *entry;
+ struct lu_buf buf;
+ int entry_count;
+ int rc;
+ ENTRY;
+
+ lu_buf_check_and_alloc(&mdd_env_info(env)->mti_xattr_buf,
+ MIN(mdd_obj2mdd_dev(obj)->mdd_dt_conf.ddp_max_ea_size,
+ XATTR_SIZE_MAX));
+ buf = mdd_env_info(env)->mti_xattr_buf;
+ if (buf.lb_buf == NULL)
+ RETURN(-ENOMEM);
+
+ if (buf.lb_len > XATTR_SIZE_MAX)
+ buf.lb_len = XATTR_SIZE_MAX;
+
+ rc = mdo_xattr_get(env, obj, &buf, XATTR_NAME_ACL_ACCESS);
+ if (rc <= 0)
+ RETURN(rc ? : -EACCES);
+
+ buf.lb_len = rc;
+ head = (posix_acl_xattr_header *)(buf.lb_buf);
+ entry = GET_POSIX_ACL_XATTR_ENTRY(head);
+ entry_count = posix_acl_xattr_count(buf.lb_len);
+
+ /* Disregard empty ACLs and fall back to
+ * standard UNIX permissions. See LU-5434 */
+ if (entry_count <= 0)
+ RETURN(-EAGAIN);
+
+ rc = lustre_posix_acl_permission(uc, la, mask, entry, entry_count);
+ RETURN(rc);
#else
- ENTRY;
- RETURN(-EAGAIN);
+ ENTRY;
+ RETURN(-EAGAIN);
#endif
}
int __mdd_permission_internal(const struct lu_env *env, struct mdd_object *obj,
- struct lu_attr *la, int mask, int needlock)
+ const struct lu_attr *la, int mask, int role)
{
- struct md_ucred *uc = md_ucred(env);
- __u32 mode;
- int rc;
- ENTRY;
+ struct lu_ucred *uc = lu_ucred(env);
+ __u32 mode;
+ int rc;
+ ENTRY;
- if (mask == 0)
- RETURN(0);
+ if (mask == 0)
+ RETURN(0);
- /* These means unnecessary for permission check */
- if ((uc == NULL) || (uc->mu_valid == UCRED_INIT))
- RETURN(0);
+ /* These means unnecessary for permission check */
+ if ((uc == NULL) || (uc->uc_valid == UCRED_INIT))
+ RETURN(0);
- /* Invalid user credit */
- if (uc->mu_valid == UCRED_INVALID)
- RETURN(-EACCES);
-
- /*
- * Nobody gets write access to an immutable file.
- */
- if ((mask & MAY_WRITE) && mdd_is_immutable(obj))
- RETURN(-EACCES);
-
- if (la == NULL) {
- la = &mdd_env_info(env)->mti_la;
- rc = mdd_la_get(env, obj, la, BYPASS_CAPA);
- if (rc)
- RETURN(rc);
- }
+ /* Invalid user credit */
+ if (uc->uc_valid == UCRED_INVALID)
+ RETURN(-EACCES);
+
+ /*
+ * Nobody gets write access to an immutable file.
+ */
+ if (mask & MAY_WRITE && la->la_flags & LUSTRE_IMMUTABLE_FL)
+ RETURN(-EACCES);
+
+ LASSERT(la != NULL);
- mode = la->la_mode;
- if (uc->mu_fsuid == la->la_uid) {
- mode >>= 6;
+ mode = la->la_mode;
+ if (uc->uc_fsuid == la->la_uid) {
+ mode >>= 6;
} else {
if (mode & S_IRWXG) {
- if (needlock)
- mdd_read_lock(env, obj);
+ if (role != -1)
+ mdd_read_lock(env, obj, role);
rc = mdd_check_acl(env, obj, la, mask);
- if (needlock)
+ if (role != -1)
mdd_read_unlock(env, obj);
if (rc == -EACCES)
goto check_capabilities;
RETURN(0);
check_capabilities:
- if (!(mask & MAY_EXEC) ||
- (la->la_mode & S_IXUGO) || S_ISDIR(la->la_mode))
- if (mdd_capable(uc, CAP_DAC_OVERRIDE))
- RETURN(0);
+ if (!(mask & MAY_EXEC) ||
+ (la->la_mode & S_IXUGO) || S_ISDIR(la->la_mode))
+ if (md_capable(uc, CFS_CAP_DAC_OVERRIDE))
+ RETURN(0);
- if ((mask == MAY_READ) ||
- (S_ISDIR(la->la_mode) && !(mask & MAY_WRITE)))
- if (mdd_capable(uc, CAP_DAC_READ_SEARCH))
- RETURN(0);
+ if ((mask == MAY_READ) ||
+ (S_ISDIR(la->la_mode) && !(mask & MAY_WRITE)))
+ if (md_capable(uc, CFS_CAP_DAC_READ_SEARCH))
+ RETURN(0);
- RETURN(-EACCES);
+ CDEBUG(D_SEC, "permission denied, mode %x, fsuid %u, uid %u\n",
+ la->la_mode, uc->uc_fsuid, la->la_uid);
+
+ RETURN(-EACCES);
}
-int mdd_permission(const struct lu_env *env,
- struct md_object *pobj, struct md_object *cobj,
- struct md_attr *ma, int mask)
+int mdd_permission(const struct lu_env *env, struct md_object *pobj,
+ struct md_object *cobj, struct md_attr *ma, int mask)
{
- struct mdd_object *mdd_pobj, *mdd_cobj;
- struct md_ucred *uc = NULL;
- struct lu_attr *la = NULL;
- int check_create, check_link;
- int check_unlink;
- int check_rename_src, check_rename_tar;
- int check_vtx_part, check_vtx_full;
- int check_rgetfacl;
- int rc = 0;
- ENTRY;
-
- LASSERT(cobj);
- mdd_cobj = md2mdd_obj(cobj);
-
- /* For cross_open case, the "mask" is open flags,
- * so convert it to permission mask first.
- * XXX: MDS_OPEN_CROSS must be NOT equal to permission mask MAY_*. */
- if (unlikely(mask & MDS_OPEN_CROSS)) {
- la = &mdd_env_info(env)->mti_la;
- rc = mdd_la_get(env, mdd_cobj, la, BYPASS_CAPA);
- if (rc)
- RETURN(rc);
-
- mask = accmode(env, la, mask & ~MDS_OPEN_CROSS);
- }
-
- check_create = mask & MAY_CREATE;
- check_link = mask & MAY_LINK;
- check_unlink = mask & MAY_UNLINK;
- check_rename_src = mask & MAY_RENAME_SRC;
- check_rename_tar = mask & MAY_RENAME_TAR;
- check_vtx_part = mask & MAY_VTX_PART;
- check_vtx_full = mask & MAY_VTX_FULL;
- check_rgetfacl = mask & MAY_RGETFACL;
-
- mask &= ~(MAY_CREATE | MAY_LINK |
- MAY_UNLINK |
- MAY_RENAME_SRC | MAY_RENAME_TAR |
- MAY_VTX_PART | MAY_VTX_FULL |
- MAY_RGETFACL);
-
- rc = mdd_permission_internal_locked(env, mdd_cobj, NULL, mask);
-
- if (!rc && (check_create || check_link))
- rc = mdd_may_create(env, mdd_cobj, NULL, 1, check_link);
-
- if (!rc && check_unlink) {
- LASSERT(ma);
- rc = mdd_may_unlink(env, mdd_cobj, ma);
- }
-
- if (!rc && (check_rename_src || check_rename_tar)) {
- LASSERT(pobj);
- LASSERT(ma);
- mdd_pobj = md2mdd_obj(pobj);
- rc = mdd_may_delete(env, mdd_pobj, mdd_cobj, ma, 1,
- check_rename_tar);
- }
-
- if (!rc && (check_vtx_part || check_vtx_full)) {
- uc = md_ucred(env);
- LASSERT(ma);
- if (likely(!la)) {
- la = &mdd_env_info(env)->mti_la;
- rc = mdd_la_get(env, mdd_cobj, la, BYPASS_CAPA);
- if (rc)
- RETURN(rc);
- }
+ struct mdd_object *mdd_pobj = NULL;
+ struct mdd_object *mdd_cobj;
+ struct lu_ucred *uc = NULL;
+ struct lu_attr *pattr = NULL;
+ struct lu_attr *cattr = MDD_ENV_VAR(env, cattr);
+ int rc = 0;
+ ENTRY;
+
+ LASSERT(cobj);
+ if (pobj != NULL) {
+ mdd_pobj = md2mdd_obj(pobj);
+ pattr = MDD_ENV_VAR(env, pattr);
+ rc = mdd_la_get(env, mdd_pobj, pattr);
+ if (rc)
+ RETURN(rc);
+ }
- if (!(la->la_mode & S_ISVTX) || (la->la_uid == uc->mu_fsuid) ||
- (check_vtx_full && (ma->ma_attr.la_valid & LA_UID) &&
- (ma->ma_attr.la_uid == uc->mu_fsuid))) {
- ma->ma_attr_flags |= MDS_VTX_BYPASS;
- } else {
- ma->ma_attr_flags &= ~MDS_VTX_BYPASS;
- if (check_vtx_full)
- rc = -EPERM;
- }
- }
+ mdd_cobj = md2mdd_obj(cobj);
+ rc = mdd_la_get(env, mdd_cobj, cattr);
+ if (rc)
+ RETURN(rc);
- if (unlikely(!rc && check_rgetfacl)) {
- if (likely(!uc))
- uc = md_ucred(env);
+ rc = mdd_permission_internal_locked(env, mdd_cobj, cattr,
+ mask & ~MAY_RGETFACL,
+ DT_TGT_CHILD);
- if (likely(!la)) {
- la = &mdd_env_info(env)->mti_la;
- rc = mdd_la_get(env, mdd_cobj, la, BYPASS_CAPA);
- if (rc)
- RETURN(rc);
- }
-
- if (la->la_uid != uc->mu_fsuid && !mdd_capable(uc, CAP_FOWNER))
- rc = -EPERM;
- }
+ if (unlikely(rc == 0 && (mask & MAY_RGETFACL))) {
+ if (likely(!uc))
+ uc = lu_ucred_assert(env);
- RETURN(rc);
-}
-
-int mdd_capa_get(const struct lu_env *env, struct md_object *obj,
- struct lustre_capa *capa, int renewal)
-{
- struct mdd_object *mdd_obj = md2mdd_obj(obj);
- struct obd_capa *oc;
- int rc = 0;
- ENTRY;
-
- oc = mdo_capa_get(env, mdd_obj, renewal ? capa : NULL,
- capa->lc_opc);
- if (IS_ERR(oc)) {
- rc = PTR_ERR(oc);
- } else {
- capa_cpy(capa, oc);
- capa_put(oc);
- }
+ if (cattr->la_uid != uc->uc_fsuid &&
+ !md_capable(uc, CFS_CAP_FOWNER))
+ rc = -EPERM;
+ }
- RETURN(rc);
+ RETURN(rc);
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff