-/* -*- 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.
*
- * mdd/mdd_handler.c
- * Lustre Metadata Server (mdd) routines
+ * 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.
*
- * Copyright (C) 2006 Cluster File Systems, Inc.
- * Author: fangyong@clusterfs.com
- * lsy@clusterfs.com
- * This file is part of the Lustre file system, http://www.lustre.org
- * Lustre is a trademark of Cluster File Systems, Inc.
+ * 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 may have signed or agreed to another license before downloading
- * this software. If so, you are bound by the terms and conditions
- * of that agreement, and the following does not apply to you. See the
- * LICENSE file included with this distribution for more information.
+ * 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
*
- * If you did not agree to a different license, then this copy of Lustre
- * is open source software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
+ * 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.
*
- * In either case, Lustre 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
- * license text for more details.
+ * GPL HEADER END
*/
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
+/*
+ * 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/mdd/mdd_permission.c
+ *
+ * Lustre Metadata Server (mdd) routines
+ *
+ * Author: fangyong@clusterfs.com
+ * Author: lsy@clusterfs.com
+ */
+
#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>
-
-#ifdef CONFIG_FS_POSIX_ACL
-# include <linux/posix_acl_xattr.h>
-# include <linux/posix_acl.h>
-#endif
-
+#include <lustre_idmap.h>
#include "mdd_internal.h"
-#define mdd_get_group_info(group_info) do { \
- atomic_inc(&(group_info)->usage); \
-} while (0)
-
-#define mdd_put_group_info(group_info) do { \
- if (atomic_dec_and_test(&(group_info)->usage)) \
- groups_free(group_info); \
-} while (0)
-
-#define MDD_NGROUPS_PER_BLOCK ((int)(CFS_PAGE_SIZE / sizeof(gid_t)))
-
-#define MDD_GROUP_AT(gi, i) \
- ((gi)->blocks[(i) / MDD_NGROUPS_PER_BLOCK][(i) % MDD_NGROUPS_PER_BLOCK])
-
-/*
- * groups_search() is copied from linux kernel!
- * A simple bsearch.
- */
-static int mdd_groups_search(struct group_info *group_info, gid_t grp)
-{
- int left, right;
-
- if (!group_info)
- return 0;
-
- left = 0;
- right = group_info->ngroups;
- while (left < right) {
- int mid = (left + right) / 2;
- int cmp = grp - MDD_GROUP_AT(group_info, mid);
-
- if (cmp > 0)
- left = mid + 1;
- else if (cmp < 0)
- right = mid;
- else
- return 1;
- }
- return 0;
-}
-
-int mdd_in_group_p(struct md_ucred *uc, gid_t grp)
-{
- int rc = 1;
-
- if (grp != uc->mu_fsgid) {
- struct group_info *group_info = NULL;
-
- if (uc->mu_ginfo || !uc->mu_identity ||
- uc->mu_valid == UCRED_OLD)
- if (grp == uc->mu_suppgids[0] ||
- grp == uc->mu_suppgids[1])
- return 1;
-
- if (uc->mu_ginfo)
- group_info = uc->mu_ginfo;
- else if (uc->mu_identity)
- group_info = uc->mu_identity->mi_ginfo;
-
- if (!group_info)
- return 0;
-
- mdd_get_group_info(group_info);
- rc = mdd_groups_search(group_info, grp);
- mdd_put_group_info(group_info);
- }
- return rc;
-}
-
#ifdef CONFIG_FS_POSIX_ACL
-static inline void mdd_acl_le_to_cpu(posix_acl_xattr_entry *p)
-{
- p->e_tag = le16_to_cpu(p->e_tag);
- p->e_perm = le16_to_cpu(p->e_perm);
- p->e_id = le32_to_cpu(p->e_id);
-}
-
-static inline void mdd_acl_cpu_to_le(posix_acl_xattr_entry *p)
-{
- p->e_tag = cpu_to_le16(p->e_tag);
- p->e_perm = cpu_to_le16(p->e_perm);
- p->e_id = cpu_to_le32(p->e_id);
-}
-
-/*
- * Check permission based on POSIX ACL.
- */
-static int mdd_posix_acl_permission(struct md_ucred *uc, struct lu_attr *la,
- int want, posix_acl_xattr_entry *entry,
- int count)
-{
- posix_acl_xattr_entry *pa, *pe, *mask_obj;
- int found = 0;
- ENTRY;
-
- if (count <= 0)
- RETURN(-EACCES);
-
- for (pa = &entry[0], pe = &entry[count - 1]; pa <= pe; pa++) {
- mdd_acl_le_to_cpu(pa);
- switch(pa->e_tag) {
- case ACL_USER_OBJ:
- /* (May have been checked already) */
- if (la->la_uid == uc->mu_fsuid)
- goto check_perm;
- break;
- case ACL_USER:
- if (pa->e_id == uc->mu_fsuid)
- goto mask;
- break;
- case ACL_GROUP_OBJ:
- if (mdd_in_group_p(uc, la->la_gid)) {
- found = 1;
- if ((pa->e_perm & want) == want)
- goto mask;
- }
- break;
- case ACL_GROUP:
- if (mdd_in_group_p(uc, pa->e_id)) {
- found = 1;
- if ((pa->e_perm & want) == want)
- goto mask;
- }
- break;
- case ACL_MASK:
- break;
- case ACL_OTHER:
- if (found)
- RETURN(-EACCES);
- else
- goto check_perm;
- default:
- RETURN(-EIO);
- }
- }
- RETURN(-EIO);
-
-mask:
- for (mask_obj = pa + 1; mask_obj <= pe; mask_obj++) {
- mdd_acl_le_to_cpu(mask_obj);
- if (mask_obj->e_tag == ACL_MASK) {
- if ((pa->e_perm & mask_obj->e_perm & want) == want)
- RETURN(0);
-
- RETURN(-EACCES);
- }
- }
-
-check_perm:
- if ((pa->e_perm & want) == want)
- RETURN(0);
-
- RETURN(-EACCES);
-}
-
-/*
- * Get default acl EA only.
- * Hold read_lock for mdd_obj.
- */
-int mdd_acl_def_get(const struct lu_env *env, struct mdd_object *mdd_obj,
- struct md_attr *ma)
-{
- 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);
-}
-
-/*
- * Modify the ACL for the chmod.
- */
-static int mdd_posix_acl_chmod_masq(posix_acl_xattr_entry *entry,
- __u32 mode, int count)
-{
- posix_acl_xattr_entry *group_obj = NULL, *mask_obj = NULL, *pa, *pe;
-
- for (pa = &entry[0], pe = &entry[count - 1]; pa <= pe; pa++) {
- mdd_acl_le_to_cpu(pa);
- switch(pa->e_tag) {
- case ACL_USER_OBJ:
- pa->e_perm = (mode & S_IRWXU) >> 6;
- break;
-
- case ACL_USER:
- case ACL_GROUP:
- break;
-
- case ACL_GROUP_OBJ:
- group_obj = pa;
- break;
-
- case ACL_MASK:
- mask_obj = pa;
- break;
-
- case ACL_OTHER:
- pa->e_perm = (mode & S_IRWXO);
- break;
-
- default:
- return -EIO;
- }
- mdd_acl_cpu_to_le(pa);
- }
-
- if (mask_obj) {
- mask_obj->e_perm = cpu_to_le16((mode & S_IRWXG) >> 3);
- } else {
- if (!group_obj)
- return -EIO;
- group_obj->e_perm = cpu_to_le16((mode & S_IRWXG) >> 3);
- }
-
- return 0;
-}
/*
* 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_chmod(const struct lu_env *env, struct mdd_object *o, __u32 mode,
+ struct thandle *handle)
{
- 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 = mdd_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 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);
}
-/*
- * Modify acl when creating a new obj.
- */
-static int mdd_posix_acl_create_masq(posix_acl_xattr_entry *entry,
- __u32 *mode_p, int count)
+int mdd_acl_set(const struct lu_env *env, struct mdd_object *obj,
+ struct lu_attr *la, const struct lu_buf *buf, int fl)
{
- posix_acl_xattr_entry *group_obj = NULL, *mask_obj = NULL, *pa, *pe;
- __u32 mode = *mode_p;
- int not_equiv = 0;
-
- for (pa = &entry[0], pe = &entry[count - 1]; pa <= pe; pa++) {
- mdd_acl_le_to_cpu(pa);
- switch(pa->e_tag) {
- case ACL_USER_OBJ:
- pa->e_perm &= (mode >> 6) | ~S_IRWXO;
- mode &= (pa->e_perm << 6) | ~S_IRWXU;
- break;
-
- case ACL_USER:
- case ACL_GROUP:
- not_equiv = 1;
- break;
-
- case ACL_GROUP_OBJ:
- group_obj = pa;
- break;
-
- case ACL_OTHER:
- pa->e_perm &= mode | ~S_IRWXO;
- mode &= pa->e_perm | ~S_IRWXO;
- break;
-
- case ACL_MASK:
- mask_obj = pa;
- not_equiv = 1;
- break;
-
- default:
- return -EIO;
- }
- mdd_acl_cpu_to_le(pa);
- }
-
- if (mask_obj) {
- mask_obj->e_perm = le16_to_cpu(mask_obj->e_perm) &
- ((mode >> 3) | ~S_IRWXO);
- mode &= (mask_obj->e_perm << 3) | ~S_IRWXG;
- mask_obj->e_perm = cpu_to_le16(mask_obj->e_perm);
- } else {
- if (!group_obj)
- return -EIO;
- group_obj->e_perm = le16_to_cpu(group_obj->e_perm) &
- ((mode >> 3) | ~S_IRWXO);
- mode &= (group_obj->e_perm << 3) | ~S_IRWXG;
- group_obj->e_perm = cpu_to_le16(group_obj->e_perm);
+ struct mdd_device *mdd = mdd_obj2mdd_dev(obj);
+ struct thandle *handle;
+ posix_acl_xattr_header *head;
+ posix_acl_xattr_entry *entry;
+ int rc, entry_count;
+ bool not_equiv, mode_change;
+ mode_t mode;
+ 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);
+
+ 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;
+ rc = mdo_declare_attr_set(env, obj, la, handle);
}
- *mode_p = (*mode_p & ~S_IRWXUGO) | mode;
- return not_equiv;
+ rc = mdd_trans_start(env, mdd, handle);
+ if (rc)
+ GOTO(stop, rc);
+
+ mdd_write_lock(env, obj, MOR_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, mdd_object_capa(env, obj));
+ else
+ rc = mdo_xattr_del(env, obj, XATTR_NAME_ACL_ACCESS, handle,
+ mdd_object_capa(env, obj));
+ if (rc)
+ GOTO(unlock, rc);
+
+ if (mode_change)
+ rc = mdo_attr_set(env, obj, la, handle,
+ mdd_object_capa(env, obj));
+
+ /* 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:
+ 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;
+ posix_acl_xattr_header *head;
+ posix_acl_xattr_entry *entry;
+ int entry_count;
+ int rc;
- ENTRY;
+ 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);
- }
+ 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 = mdd_posix_acl_create_masq(entry, mode, entry_count);
- if (rc <= 0)
- RETURN(rc);
+ rc = lustre_posix_acl_create_masq(entry, mode, entry_count);
- rc = mdo_xattr_set(env, obj, buf, XATTR_NAME_ACL_ACCESS, 0, handle,
- BYPASS_CAPA);
- RETURN(rc);
+ RETURN(rc);
}
-/*
- * Hold read_lock for pobj.
- * Hold write_lock for cobj.
- */
-int mdd_acl_init(const struct lu_env *env, struct mdd_object *pobj,
- struct mdd_object *cobj, __u32 *mode, struct thandle *handle)
-{
- struct lu_buf *buf;
- int rc;
- ENTRY;
-
- if (S_ISLNK(*mode))
- RETURN(0);
-
- 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, pobj, buf, XATTR_NAME_ACL_DEFAULT, BYPASS_CAPA);
- if ((rc == -EOPNOTSUPP) || (rc == -ENODATA))
- RETURN(0);
- else if (rc <= 0)
- RETURN(rc);
-
- buf->lb_len = rc;
- rc = __mdd_acl_init(env, cobj, buf, mode, handle);
- 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);
+ struct lu_ucred *uc = lu_ucred_assert(env);
posix_acl_xattr_header *head;
posix_acl_xattr_entry *entry;
struct lu_buf *buf;
int rc;
ENTRY;
- buf = mdd_buf_get(env, mdd_env_info(env)->mti_xattr_buf,
+ 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));
entry_count = (buf->lb_len - sizeof(head->a_version)) /
sizeof(posix_acl_xattr_entry);
- rc = mdd_posix_acl_permission(uc, la, mask, entry, entry_count);
+ rc = lustre_posix_acl_permission(uc, la, mask, entry, entry_count);
RETURN(rc);
#else
ENTRY;
}
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);
+ struct lu_ucred *uc = lu_ucred(env);
__u32 mode;
int rc;
ENTRY;
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);
+ /* Invalid user credit */
+ if (uc->uc_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);
- }
+ LASSERT(la != NULL);
mode = la->la_mode;
- if (uc->mu_fsuid == la->la_uid) {
- mode >>= 6;
+ 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;
(rc != -ENODATA))
RETURN(rc);
}
- if (mdd_in_group_p(uc, la->la_gid))
+ if (lustre_in_group_p(uc, la->la_gid))
mode >>= 3;
}
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);
+ RETURN(-EACCES);
}
-int mdd_permission(const struct lu_env *env,
+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 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 rc = 0;
- ENTRY;
-
- LASSERT(cobj);
- mdd_cobj = md2mdd_obj(cobj);
+ 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);
+ bool check_create;
+ bool 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);
+ if (pobj != NULL) {
+ mdd_pobj = md2mdd_obj(pobj);
+ pattr = MDD_ENV_VAR(env, pattr);
+ rc = mdd_la_get(env, mdd_pobj, pattr, BYPASS_CAPA);
+ if (rc)
+ RETURN(rc);
+ }
- /* 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);
+ mdd_cobj = md2mdd_obj(cobj);
+ rc = mdd_la_get(env, mdd_cobj, cattr, BYPASS_CAPA);
+ if (rc)
+ RETURN(rc);
- mask = accmode(env, la, mask & ~MDS_OPEN_CROSS);
- }
+ /* 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))
+ mask = accmode(env, cattr, mask & ~MDS_OPEN_CROSS);
- check_create = mask & MAY_CREATE;
- check_link = mask & MAY_LINK;
+ 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_VTX_PART | MAY_VTX_FULL |
+ MAY_RGETFACL);
- rc = mdd_permission_internal_locked(env, mdd_cobj, NULL, mask);
+ rc = mdd_permission_internal_locked(env, mdd_cobj, cattr, mask,
+ MOR_TGT_CHILD);
- if (!rc && (check_create || check_link))
- rc = mdd_may_create(env, mdd_cobj, NULL, 1, check_link);
+ if (!rc && check_create)
+ rc = mdd_may_create(env, mdd_pobj, pattr, mdd_cobj, true);
- if (!rc && check_unlink) {
- LASSERT(ma);
- rc = mdd_may_unlink(env, mdd_cobj, ma);
- }
+ if (!rc && check_unlink)
+ rc = mdd_may_unlink(env, mdd_pobj, pattr, cattr);
- 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_rename_src || check_rename_tar))
+ rc = mdd_may_delete(env, mdd_pobj, pattr, mdd_cobj, cattr, NULL,
+ 1, check_rename_tar);
if (!rc && (check_vtx_part || check_vtx_full)) {
- struct md_ucred *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);
- }
+ uc = lu_ucred_assert(env);
- 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;
+ if (!(cattr->la_mode & S_ISVTX) ||
+ (cattr->la_uid == uc->uc_fsuid) ||
+ (check_vtx_full && (ma->ma_attr.la_valid & LA_UID) &&
+ (ma->ma_attr.la_uid == uc->uc_fsuid))) {
+ ma->ma_attr_flags |= MDS_VTX_BYPASS;
} else {
ma->ma_attr_flags &= ~MDS_VTX_BYPASS;
if (check_vtx_full)
}
}
+ if (unlikely(!rc && check_rgetfacl)) {
+ if (likely(!uc))
+ uc = lu_ucred_assert(env);
+
+ if (cattr->la_uid != uc->uc_fsuid &&
+ !md_capable(uc, CFS_CAP_FOWNER))
+ rc = -EPERM;
+ }
+
RETURN(rc);
}
capa->lc_opc);
if (IS_ERR(oc)) {
rc = PTR_ERR(oc);
- } else {
+ } else if (likely(oc != NULL)) {
capa_cpy(capa, oc);
capa_put(oc);
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff