| /* |
| * 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.gnu.org/licenses/gpl-2.0.html |
| * |
| * GPL HEADER END |
| */ |
| /* |
| * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
| * Use is subject to license terms. |
| * |
| * Copyright (c) 2012, 2015, Intel Corporation. |
| */ |
| /* |
| * This file is part of Lustre, http://www.lustre.org/ |
| * Lustre is a trademark of Sun Microsystems, Inc. |
| */ |
| |
| #define DEBUG_SUBSYSTEM S_LOV |
| |
| #include <linux/libcfs/libcfs.h> |
| |
| #include <obd_class.h> |
| #include "lov_internal.h" |
| |
| /** Merge the lock value block(&lvb) attributes and KMS from each of the |
| * stripes in a file into a single lvb. It is expected that the caller |
| * initializes the current atime, mtime, ctime to avoid regressing a more |
| * uptodate time on the local client. |
| */ |
| int lov_merge_lvb_kms(struct lov_stripe_md *lsm, |
| struct ost_lvb *lvb, __u64 *kms_place) |
| { |
| __u64 size = 0; |
| __u64 kms = 0; |
| __u64 blocks = 0; |
| s64 current_mtime = lvb->lvb_mtime; |
| s64 current_atime = lvb->lvb_atime; |
| s64 current_ctime = lvb->lvb_ctime; |
| int i; |
| int rc = 0; |
| |
| assert_spin_locked(&lsm->lsm_lock); |
| LASSERT(lsm->lsm_lock_owner == current_pid()); |
| |
| CDEBUG(D_INODE, "MDT ID " DOSTID " initial value: s=%llu m=%llu a=%llu c=%llu b=%llu\n", |
| POSTID(&lsm->lsm_oi), lvb->lvb_size, lvb->lvb_mtime, |
| lvb->lvb_atime, lvb->lvb_ctime, lvb->lvb_blocks); |
| for (i = 0; i < lsm->lsm_stripe_count; i++) { |
| struct lov_oinfo *loi = lsm->lsm_oinfo[i]; |
| u64 lov_size, tmpsize; |
| |
| if (OST_LVB_IS_ERR(loi->loi_lvb.lvb_blocks)) { |
| rc = OST_LVB_GET_ERR(loi->loi_lvb.lvb_blocks); |
| continue; |
| } |
| |
| tmpsize = loi->loi_kms; |
| lov_size = lov_stripe_size(lsm, tmpsize, i); |
| if (lov_size > kms) |
| kms = lov_size; |
| |
| if (loi->loi_lvb.lvb_size > tmpsize) |
| tmpsize = loi->loi_lvb.lvb_size; |
| |
| lov_size = lov_stripe_size(lsm, tmpsize, i); |
| if (lov_size > size) |
| size = lov_size; |
| /* merge blocks, mtime, atime */ |
| blocks += loi->loi_lvb.lvb_blocks; |
| if (loi->loi_lvb.lvb_mtime > current_mtime) |
| current_mtime = loi->loi_lvb.lvb_mtime; |
| if (loi->loi_lvb.lvb_atime > current_atime) |
| current_atime = loi->loi_lvb.lvb_atime; |
| if (loi->loi_lvb.lvb_ctime > current_ctime) |
| current_ctime = loi->loi_lvb.lvb_ctime; |
| |
| CDEBUG(D_INODE, "MDT ID " DOSTID " on OST[%u]: s=%llu m=%llu a=%llu c=%llu b=%llu\n", |
| POSTID(&lsm->lsm_oi), loi->loi_ost_idx, |
| loi->loi_lvb.lvb_size, loi->loi_lvb.lvb_mtime, |
| loi->loi_lvb.lvb_atime, loi->loi_lvb.lvb_ctime, |
| loi->loi_lvb.lvb_blocks); |
| } |
| |
| *kms_place = kms; |
| lvb->lvb_size = size; |
| lvb->lvb_blocks = blocks; |
| lvb->lvb_mtime = current_mtime; |
| lvb->lvb_atime = current_atime; |
| lvb->lvb_ctime = current_ctime; |
| return rc; |
| } |