| /* |
| * 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) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
| * Use is subject to license terms. |
| * |
| * Copyright (c) 2012, 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 "../../include/linux/libcfs/libcfs.h" |
| |
| #include "../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; |
| } |
| |
| /* Must be called under the lov_stripe_lock() */ |
| int lov_adjust_kms(struct obd_export *exp, struct lov_stripe_md *lsm, |
| u64 size, int shrink) |
| { |
| struct lov_oinfo *loi; |
| int stripe = 0; |
| __u64 kms; |
| |
| assert_spin_locked(&lsm->lsm_lock); |
| LASSERT(lsm->lsm_lock_owner == current_pid()); |
| |
| if (shrink) { |
| for (; stripe < lsm->lsm_stripe_count; stripe++) { |
| struct lov_oinfo *loi = lsm->lsm_oinfo[stripe]; |
| kms = lov_size_to_stripe(lsm, size, stripe); |
| CDEBUG(D_INODE, |
| "stripe %d KMS %sing %llu->%llu\n", |
| stripe, kms > loi->loi_kms ? "increase":"shrink", |
| loi->loi_kms, kms); |
| loi_kms_set(loi, loi->loi_lvb.lvb_size = kms); |
| } |
| return 0; |
| } |
| |
| if (size > 0) |
| stripe = lov_stripe_number(lsm, size - 1); |
| kms = lov_size_to_stripe(lsm, size, stripe); |
| loi = lsm->lsm_oinfo[stripe]; |
| |
| CDEBUG(D_INODE, "stripe %d KMS %sincreasing %llu->%llu\n", |
| stripe, kms > loi->loi_kms ? "" : "not ", loi->loi_kms, kms); |
| if (kms > loi->loi_kms) |
| loi_kms_set(loi, kms); |
| |
| return 0; |
| } |
| |
| void lov_merge_attrs(struct obdo *tgt, struct obdo *src, u64 valid, |
| struct lov_stripe_md *lsm, int stripeno, int *set) |
| { |
| valid &= src->o_valid; |
| |
| if (*set) { |
| if (valid & OBD_MD_FLSIZE) { |
| /* this handles sparse files properly */ |
| u64 lov_size; |
| |
| lov_size = lov_stripe_size(lsm, src->o_size, stripeno); |
| if (lov_size > tgt->o_size) |
| tgt->o_size = lov_size; |
| } |
| if (valid & OBD_MD_FLBLOCKS) |
| tgt->o_blocks += src->o_blocks; |
| if (valid & OBD_MD_FLBLKSZ) |
| tgt->o_blksize += src->o_blksize; |
| if (valid & OBD_MD_FLCTIME && tgt->o_ctime < src->o_ctime) |
| tgt->o_ctime = src->o_ctime; |
| if (valid & OBD_MD_FLMTIME && tgt->o_mtime < src->o_mtime) |
| tgt->o_mtime = src->o_mtime; |
| if (valid & OBD_MD_FLDATAVERSION) |
| tgt->o_data_version += src->o_data_version; |
| } else { |
| memcpy(tgt, src, sizeof(*tgt)); |
| tgt->o_oi = lsm->lsm_oi; |
| if (valid & OBD_MD_FLSIZE) |
| tgt->o_size = lov_stripe_size(lsm, src->o_size, |
| stripeno); |
| } |
| |
| /* data_version needs to be valid on all stripes to be correct! */ |
| if (!(valid & OBD_MD_FLDATAVERSION)) |
| tgt->o_valid &= ~OBD_MD_FLDATAVERSION; |
| |
| *set += 1; |
| } |