622 lines
16 KiB
C
622 lines
16 KiB
C
/*
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* GPL HEADER START
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 only,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License version 2 for more details (a copy is included
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* in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU General Public License
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* version 2 along with this program; If not, see
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* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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* GPL HEADER END
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*/
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/*
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* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
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* Use is subject to license terms.
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*
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* Copyright (c) 2011, 2012, Intel Corporation.
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*/
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/*
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* This file is part of Lustre, http://www.lustre.org/
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* Lustre is a trademark of Sun Microsystems, Inc.
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*/
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#include <linux/fs.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/selinux.h>
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#define DEBUG_SUBSYSTEM S_LLITE
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#include "../include/obd_support.h"
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#include "../include/lustre_lite.h"
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#include "../include/lustre_dlm.h"
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#include "../include/lustre_ver.h"
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#include "../include/lustre_eacl.h"
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#include "llite_internal.h"
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#define XATTR_USER_T (1)
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#define XATTR_TRUSTED_T (2)
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#define XATTR_SECURITY_T (3)
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#define XATTR_ACL_ACCESS_T (4)
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#define XATTR_ACL_DEFAULT_T (5)
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#define XATTR_LUSTRE_T (6)
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#define XATTR_OTHER_T (7)
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static
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int get_xattr_type(const char *name)
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{
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if (!strcmp(name, POSIX_ACL_XATTR_ACCESS))
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return XATTR_ACL_ACCESS_T;
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if (!strcmp(name, POSIX_ACL_XATTR_DEFAULT))
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return XATTR_ACL_DEFAULT_T;
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if (!strncmp(name, XATTR_USER_PREFIX,
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sizeof(XATTR_USER_PREFIX) - 1))
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return XATTR_USER_T;
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if (!strncmp(name, XATTR_TRUSTED_PREFIX,
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sizeof(XATTR_TRUSTED_PREFIX) - 1))
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return XATTR_TRUSTED_T;
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if (!strncmp(name, XATTR_SECURITY_PREFIX,
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sizeof(XATTR_SECURITY_PREFIX) - 1))
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return XATTR_SECURITY_T;
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if (!strncmp(name, XATTR_LUSTRE_PREFIX,
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sizeof(XATTR_LUSTRE_PREFIX) - 1))
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return XATTR_LUSTRE_T;
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return XATTR_OTHER_T;
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}
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static
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int xattr_type_filter(struct ll_sb_info *sbi, int xattr_type)
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{
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if ((xattr_type == XATTR_ACL_ACCESS_T ||
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xattr_type == XATTR_ACL_DEFAULT_T) &&
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!(sbi->ll_flags & LL_SBI_ACL))
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return -EOPNOTSUPP;
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if (xattr_type == XATTR_USER_T && !(sbi->ll_flags & LL_SBI_USER_XATTR))
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return -EOPNOTSUPP;
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if (xattr_type == XATTR_TRUSTED_T && !capable(CFS_CAP_SYS_ADMIN))
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return -EPERM;
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if (xattr_type == XATTR_OTHER_T)
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return -EOPNOTSUPP;
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return 0;
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}
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static
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int ll_setxattr_common(struct inode *inode, const char *name,
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const void *value, size_t size,
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int flags, __u64 valid)
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{
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struct ll_sb_info *sbi = ll_i2sbi(inode);
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struct ptlrpc_request *req = NULL;
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int xattr_type, rc;
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struct obd_capa *oc;
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#ifdef CONFIG_FS_POSIX_ACL
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struct rmtacl_ctl_entry *rce = NULL;
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posix_acl_xattr_header *new_value = NULL;
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ext_acl_xattr_header *acl = NULL;
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#endif
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const char *pv = value;
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xattr_type = get_xattr_type(name);
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rc = xattr_type_filter(sbi, xattr_type);
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if (rc)
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return rc;
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if ((xattr_type == XATTR_ACL_ACCESS_T ||
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xattr_type == XATTR_ACL_DEFAULT_T) &&
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!inode_owner_or_capable(inode))
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return -EPERM;
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/* b10667: ignore lustre special xattr for now */
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if ((xattr_type == XATTR_TRUSTED_T && strcmp(name, "trusted.lov") == 0) ||
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(xattr_type == XATTR_LUSTRE_T && strcmp(name, "lustre.lov") == 0))
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return 0;
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/* b15587: ignore security.capability xattr for now */
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if ((xattr_type == XATTR_SECURITY_T &&
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strcmp(name, "security.capability") == 0))
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return 0;
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/* LU-549: Disable security.selinux when selinux is disabled */
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if (xattr_type == XATTR_SECURITY_T && !selinux_is_enabled() &&
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strcmp(name, "security.selinux") == 0)
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return -EOPNOTSUPP;
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#ifdef CONFIG_FS_POSIX_ACL
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if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
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(xattr_type == XATTR_ACL_ACCESS_T ||
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xattr_type == XATTR_ACL_DEFAULT_T)) {
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rce = rct_search(&sbi->ll_rct, current_pid());
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if (rce == NULL ||
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(rce->rce_ops != RMT_LSETFACL &&
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rce->rce_ops != RMT_RSETFACL))
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return -EOPNOTSUPP;
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if (rce->rce_ops == RMT_LSETFACL) {
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struct eacl_entry *ee;
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ee = et_search_del(&sbi->ll_et, current_pid(),
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ll_inode2fid(inode), xattr_type);
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LASSERT(ee != NULL);
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if (valid & OBD_MD_FLXATTR) {
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acl = lustre_acl_xattr_merge2ext(
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(posix_acl_xattr_header *)value,
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size, ee->ee_acl);
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if (IS_ERR(acl)) {
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ee_free(ee);
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return PTR_ERR(acl);
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}
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size = CFS_ACL_XATTR_SIZE(\
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le32_to_cpu(acl->a_count), \
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ext_acl_xattr);
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pv = (const char *)acl;
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}
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ee_free(ee);
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} else if (rce->rce_ops == RMT_RSETFACL) {
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size = lustre_posix_acl_xattr_filter(
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(posix_acl_xattr_header *)value,
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size, &new_value);
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if (unlikely(size < 0))
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return size;
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pv = (const char *)new_value;
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} else
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return -EOPNOTSUPP;
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valid |= rce_ops2valid(rce->rce_ops);
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}
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#endif
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oc = ll_mdscapa_get(inode);
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rc = md_setxattr(sbi->ll_md_exp, ll_inode2fid(inode), oc,
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valid, name, pv, size, 0, flags,
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ll_i2suppgid(inode), &req);
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capa_put(oc);
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#ifdef CONFIG_FS_POSIX_ACL
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if (new_value != NULL)
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lustre_posix_acl_xattr_free(new_value, size);
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if (acl != NULL)
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lustre_ext_acl_xattr_free(acl);
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#endif
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if (rc) {
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if (rc == -EOPNOTSUPP && xattr_type == XATTR_USER_T) {
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LCONSOLE_INFO("Disabling user_xattr feature because it is not supported on the server\n");
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sbi->ll_flags &= ~LL_SBI_USER_XATTR;
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}
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return rc;
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}
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ptlrpc_req_finished(req);
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return 0;
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}
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int ll_setxattr(struct dentry *dentry, const char *name,
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const void *value, size_t size, int flags)
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{
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struct inode *inode = d_inode(dentry);
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LASSERT(inode);
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LASSERT(name);
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CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), xattr %s\n",
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inode->i_ino, inode->i_generation, inode, name);
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ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_SETXATTR, 1);
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if ((strncmp(name, XATTR_TRUSTED_PREFIX,
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sizeof(XATTR_TRUSTED_PREFIX) - 1) == 0 &&
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strcmp(name + sizeof(XATTR_TRUSTED_PREFIX) - 1, "lov") == 0) ||
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(strncmp(name, XATTR_LUSTRE_PREFIX,
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sizeof(XATTR_LUSTRE_PREFIX) - 1) == 0 &&
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strcmp(name + sizeof(XATTR_LUSTRE_PREFIX) - 1, "lov") == 0)) {
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struct lov_user_md *lump = (struct lov_user_md *)value;
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int rc = 0;
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if (size != 0 && size < sizeof(struct lov_user_md))
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return -EINVAL;
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/* Attributes that are saved via getxattr will always have
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* the stripe_offset as 0. Instead, the MDS should be
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* allowed to pick the starting OST index. b=17846 */
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if (lump != NULL && lump->lmm_stripe_offset == 0)
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lump->lmm_stripe_offset = -1;
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if (lump != NULL && S_ISREG(inode->i_mode)) {
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int flags = FMODE_WRITE;
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int lum_size = (lump->lmm_magic == LOV_USER_MAGIC_V1) ?
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sizeof(*lump) : sizeof(struct lov_user_md_v3);
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rc = ll_lov_setstripe_ea_info(inode, dentry, flags, lump,
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lum_size);
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/* b10667: rc always be 0 here for now */
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rc = 0;
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} else if (S_ISDIR(inode->i_mode)) {
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rc = ll_dir_setstripe(inode, lump, 0);
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}
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return rc;
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} else if (strcmp(name, XATTR_NAME_LMA) == 0 ||
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strcmp(name, XATTR_NAME_LINK) == 0)
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return 0;
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return ll_setxattr_common(inode, name, value, size, flags,
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OBD_MD_FLXATTR);
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}
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int ll_removexattr(struct dentry *dentry, const char *name)
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{
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struct inode *inode = d_inode(dentry);
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LASSERT(inode);
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LASSERT(name);
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CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), xattr %s\n",
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inode->i_ino, inode->i_generation, inode, name);
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ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_REMOVEXATTR, 1);
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return ll_setxattr_common(inode, name, NULL, 0, 0,
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OBD_MD_FLXATTRRM);
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}
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static
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int ll_getxattr_common(struct inode *inode, const char *name,
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void *buffer, size_t size, __u64 valid)
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{
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struct ll_sb_info *sbi = ll_i2sbi(inode);
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struct ptlrpc_request *req = NULL;
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struct mdt_body *body;
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int xattr_type, rc;
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void *xdata;
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struct obd_capa *oc;
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struct rmtacl_ctl_entry *rce = NULL;
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struct ll_inode_info *lli = ll_i2info(inode);
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CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n",
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inode->i_ino, inode->i_generation, inode);
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/* listxattr have slightly different behavior from of ext3:
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* without 'user_xattr' ext3 will list all xattr names but
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* filtered out "^user..*"; we list them all for simplicity.
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*/
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if (!name) {
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xattr_type = XATTR_OTHER_T;
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goto do_getxattr;
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}
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xattr_type = get_xattr_type(name);
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rc = xattr_type_filter(sbi, xattr_type);
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if (rc)
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return rc;
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/* b15587: ignore security.capability xattr for now */
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if ((xattr_type == XATTR_SECURITY_T &&
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strcmp(name, "security.capability") == 0))
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return -ENODATA;
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/* LU-549: Disable security.selinux when selinux is disabled */
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if (xattr_type == XATTR_SECURITY_T && !selinux_is_enabled() &&
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strcmp(name, "security.selinux") == 0)
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return -EOPNOTSUPP;
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#ifdef CONFIG_FS_POSIX_ACL
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if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
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(xattr_type == XATTR_ACL_ACCESS_T ||
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xattr_type == XATTR_ACL_DEFAULT_T)) {
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rce = rct_search(&sbi->ll_rct, current_pid());
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if (rce == NULL ||
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(rce->rce_ops != RMT_LSETFACL &&
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rce->rce_ops != RMT_LGETFACL &&
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rce->rce_ops != RMT_RSETFACL &&
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rce->rce_ops != RMT_RGETFACL))
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return -EOPNOTSUPP;
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}
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/* posix acl is under protection of LOOKUP lock. when calling to this,
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* we just have path resolution to the target inode, so we have great
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* chance that cached ACL is uptodate.
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*/
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if (xattr_type == XATTR_ACL_ACCESS_T &&
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!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
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struct posix_acl *acl;
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spin_lock(&lli->lli_lock);
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acl = posix_acl_dup(lli->lli_posix_acl);
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spin_unlock(&lli->lli_lock);
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if (!acl)
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return -ENODATA;
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rc = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
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posix_acl_release(acl);
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return rc;
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}
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if (xattr_type == XATTR_ACL_DEFAULT_T && !S_ISDIR(inode->i_mode))
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return -ENODATA;
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#endif
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do_getxattr:
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if (sbi->ll_xattr_cache_enabled && xattr_type != XATTR_ACL_ACCESS_T) {
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rc = ll_xattr_cache_get(inode, name, buffer, size, valid);
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if (rc == -EAGAIN)
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goto getxattr_nocache;
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if (rc < 0)
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goto out_xattr;
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/* Add "system.posix_acl_access" to the list */
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if (lli->lli_posix_acl != NULL && valid & OBD_MD_FLXATTRLS) {
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if (size == 0) {
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rc += sizeof(XATTR_NAME_ACL_ACCESS);
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} else if (size - rc >= sizeof(XATTR_NAME_ACL_ACCESS)) {
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memcpy(buffer + rc, XATTR_NAME_ACL_ACCESS,
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sizeof(XATTR_NAME_ACL_ACCESS));
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rc += sizeof(XATTR_NAME_ACL_ACCESS);
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} else {
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rc = -ERANGE;
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goto out_xattr;
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}
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}
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} else {
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getxattr_nocache:
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oc = ll_mdscapa_get(inode);
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rc = md_getxattr(sbi->ll_md_exp, ll_inode2fid(inode), oc,
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valid | (rce ? rce_ops2valid(rce->rce_ops) : 0),
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name, NULL, 0, size, 0, &req);
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capa_put(oc);
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if (rc < 0)
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goto out_xattr;
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body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
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LASSERT(body);
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/* only detect the xattr size */
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if (size == 0) {
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rc = body->eadatasize;
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goto out;
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}
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if (size < body->eadatasize) {
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CERROR("server bug: replied size %u > %u\n",
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body->eadatasize, (int)size);
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rc = -ERANGE;
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goto out;
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}
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if (body->eadatasize == 0) {
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rc = -ENODATA;
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goto out;
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}
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/* do not need swab xattr data */
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xdata = req_capsule_server_sized_get(&req->rq_pill, &RMF_EADATA,
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body->eadatasize);
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if (!xdata) {
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rc = -EFAULT;
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goto out;
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}
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memcpy(buffer, xdata, body->eadatasize);
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rc = body->eadatasize;
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}
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#ifdef CONFIG_FS_POSIX_ACL
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if (rce && rce->rce_ops == RMT_LSETFACL) {
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ext_acl_xattr_header *acl;
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acl = lustre_posix_acl_xattr_2ext(
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(posix_acl_xattr_header *)buffer, rc);
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if (IS_ERR(acl)) {
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rc = PTR_ERR(acl);
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goto out;
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}
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rc = ee_add(&sbi->ll_et, current_pid(), ll_inode2fid(inode),
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xattr_type, acl);
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if (unlikely(rc < 0)) {
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lustre_ext_acl_xattr_free(acl);
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goto out;
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}
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}
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#endif
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out_xattr:
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if (rc == -EOPNOTSUPP && xattr_type == XATTR_USER_T) {
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LCONSOLE_INFO(
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"%s: disabling user_xattr feature because it is not supported on the server: rc = %d\n",
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ll_get_fsname(inode->i_sb, NULL, 0), rc);
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sbi->ll_flags &= ~LL_SBI_USER_XATTR;
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}
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out:
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ptlrpc_req_finished(req);
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return rc;
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}
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ssize_t ll_getxattr(struct dentry *dentry, const char *name,
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void *buffer, size_t size)
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{
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struct inode *inode = d_inode(dentry);
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LASSERT(inode);
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LASSERT(name);
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CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), xattr %s\n",
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inode->i_ino, inode->i_generation, inode, name);
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ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_GETXATTR, 1);
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if ((strncmp(name, XATTR_TRUSTED_PREFIX,
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sizeof(XATTR_TRUSTED_PREFIX) - 1) == 0 &&
|
|
strcmp(name + sizeof(XATTR_TRUSTED_PREFIX) - 1, "lov") == 0) ||
|
|
(strncmp(name, XATTR_LUSTRE_PREFIX,
|
|
sizeof(XATTR_LUSTRE_PREFIX) - 1) == 0 &&
|
|
strcmp(name + sizeof(XATTR_LUSTRE_PREFIX) - 1, "lov") == 0)) {
|
|
struct lov_stripe_md *lsm;
|
|
struct lov_user_md *lump;
|
|
struct lov_mds_md *lmm = NULL;
|
|
struct ptlrpc_request *request = NULL;
|
|
int rc = 0, lmmsize = 0;
|
|
|
|
if (!S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode))
|
|
return -ENODATA;
|
|
|
|
if (size == 0 && S_ISDIR(inode->i_mode)) {
|
|
/* XXX directory EA is fix for now, optimize to save
|
|
* RPC transfer */
|
|
rc = sizeof(struct lov_user_md);
|
|
goto out;
|
|
}
|
|
|
|
lsm = ccc_inode_lsm_get(inode);
|
|
if (lsm == NULL) {
|
|
if (S_ISDIR(inode->i_mode)) {
|
|
rc = ll_dir_getstripe(inode, &lmm,
|
|
&lmmsize, &request);
|
|
} else {
|
|
rc = -ENODATA;
|
|
}
|
|
} else {
|
|
/* LSM is present already after lookup/getattr call.
|
|
* we need to grab layout lock once it is implemented */
|
|
rc = obd_packmd(ll_i2dtexp(inode), &lmm, lsm);
|
|
lmmsize = rc;
|
|
}
|
|
ccc_inode_lsm_put(inode, lsm);
|
|
|
|
if (rc < 0)
|
|
goto out;
|
|
|
|
if (size == 0) {
|
|
/* used to call ll_get_max_mdsize() forward to get
|
|
* the maximum buffer size, while some apps (such as
|
|
* rsync 3.0.x) care much about the exact xattr value
|
|
* size */
|
|
rc = lmmsize;
|
|
goto out;
|
|
}
|
|
|
|
if (size < lmmsize) {
|
|
CERROR("server bug: replied size %d > %d for %pd (%s)\n",
|
|
lmmsize, (int)size, dentry, name);
|
|
rc = -ERANGE;
|
|
goto out;
|
|
}
|
|
|
|
lump = (struct lov_user_md *)buffer;
|
|
memcpy(lump, lmm, lmmsize);
|
|
/* do not return layout gen for getxattr otherwise it would
|
|
* confuse tar --xattr by recognizing layout gen as stripe
|
|
* offset when the file is restored. See LU-2809. */
|
|
lump->lmm_layout_gen = 0;
|
|
|
|
rc = lmmsize;
|
|
out:
|
|
if (request)
|
|
ptlrpc_req_finished(request);
|
|
else if (lmm)
|
|
obd_free_diskmd(ll_i2dtexp(inode), &lmm);
|
|
return rc;
|
|
}
|
|
|
|
return ll_getxattr_common(inode, name, buffer, size, OBD_MD_FLXATTR);
|
|
}
|
|
|
|
ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size)
|
|
{
|
|
struct inode *inode = d_inode(dentry);
|
|
int rc = 0, rc2 = 0;
|
|
struct lov_mds_md *lmm = NULL;
|
|
struct ptlrpc_request *request = NULL;
|
|
int lmmsize;
|
|
|
|
LASSERT(inode);
|
|
|
|
CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n",
|
|
inode->i_ino, inode->i_generation, inode);
|
|
|
|
ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_LISTXATTR, 1);
|
|
|
|
rc = ll_getxattr_common(inode, NULL, buffer, size, OBD_MD_FLXATTRLS);
|
|
if (rc < 0)
|
|
goto out;
|
|
|
|
if (buffer != NULL) {
|
|
struct ll_sb_info *sbi = ll_i2sbi(inode);
|
|
char *xattr_name = buffer;
|
|
int xlen, rem = rc;
|
|
|
|
while (rem > 0) {
|
|
xlen = strnlen(xattr_name, rem - 1) + 1;
|
|
rem -= xlen;
|
|
if (xattr_type_filter(sbi,
|
|
get_xattr_type(xattr_name)) == 0) {
|
|
/* skip OK xattr type
|
|
* leave it in buffer
|
|
*/
|
|
xattr_name += xlen;
|
|
continue;
|
|
}
|
|
/* move up remaining xattrs in buffer
|
|
* removing the xattr that is not OK
|
|
*/
|
|
memmove(xattr_name, xattr_name + xlen, rem);
|
|
rc -= xlen;
|
|
}
|
|
}
|
|
if (S_ISREG(inode->i_mode)) {
|
|
if (!ll_i2info(inode)->lli_has_smd)
|
|
rc2 = -1;
|
|
} else if (S_ISDIR(inode->i_mode)) {
|
|
rc2 = ll_dir_getstripe(inode, &lmm, &lmmsize, &request);
|
|
}
|
|
|
|
if (rc2 < 0) {
|
|
rc2 = 0;
|
|
goto out;
|
|
} else if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) {
|
|
const int prefix_len = sizeof(XATTR_LUSTRE_PREFIX) - 1;
|
|
const size_t name_len = sizeof("lov") - 1;
|
|
const size_t total_len = prefix_len + name_len + 1;
|
|
|
|
if (((rc + total_len) > size) && (buffer != NULL)) {
|
|
ptlrpc_req_finished(request);
|
|
return -ERANGE;
|
|
}
|
|
|
|
if (buffer != NULL) {
|
|
buffer += rc;
|
|
memcpy(buffer, XATTR_LUSTRE_PREFIX, prefix_len);
|
|
memcpy(buffer + prefix_len, "lov", name_len);
|
|
buffer[prefix_len + name_len] = '\0';
|
|
}
|
|
rc2 = total_len;
|
|
}
|
|
out:
|
|
ptlrpc_req_finished(request);
|
|
rc = rc + rc2;
|
|
|
|
return rc;
|
|
}
|