X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Flov%2Flov_merge.c;h=f13ec670cd237daffd1c3e2ab3932b34e0a17021;hp=97123f836fb445a51e4f4760edd5d8da50b44e42;hb=f3f651556282469e9675e5d16e20949e48b8c84a;hpb=22a1b359cb17a8e812bbda8d344f808369740f2e diff --git a/lustre/lov/lov_merge.c b/lustre/lov/lov_merge.c index 97123f8..f13ec67 100644 --- a/lustre/lov/lov_merge.c +++ b/lustre/lov/lov_merge.c @@ -1,71 +1,70 @@ -/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- - * vim:expandtab:shiftwidth=8:tabstop=8: +/* + * GPL HEADER START * - * Copyright (C) 2002, 2003 Cluster File Systems, Inc. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * - * 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 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. * - * 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. + * 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). * - * 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. + * 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 * - * 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 + */ +/* + * 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. */ -#ifndef EXPORT_SYMTAB -# define EXPORT_SYMTAB -#endif #define DEBUG_SUBSYSTEM S_LOV -#ifdef __KERNEL__ #include -#else -#include -#endif #include -#include - #include "lov_internal.h" -/* Merge the lock value block(&lvb) attributes 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. - * - * If @kms_only is set then we do not consider the recently seen size (rss) - * when updating the known minimum size (kms). Even when merging RSS, we will - * take the KMS value if it's larger. This prevents getattr from stomping on - * dirty cached pages which extend the file size. */ -int lov_merge_lvb(struct obd_export *exp, struct lov_stripe_md *lsm, - struct ost_lvb *lvb, int kms_only) +/** 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 blocks = 0; - __u64 current_mtime = lvb->lvb_mtime; - __u64 current_atime = lvb->lvb_atime; - __u64 current_ctime = lvb->lvb_ctime; - int i; - int rc = 0; - - LASSERT_SPIN_LOCKED(&lsm->lsm_lock); -#ifdef __KERNEL__ - LASSERT(lsm->lsm_lock_owner == cfs_curproc_pid()); -#endif - - for (i = 0; i < lsm->lsm_stripe_count; i++) { - struct lov_oinfo *loi = lsm->lsm_oinfo[i]; - obd_size lov_size, tmpsize; + 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_entries[0]->lsme_stripe_count; i++) { + struct lov_oinfo *loi = lsm->lsm_entries[0]->lsme_oinfo[i]; + u64 lov_size; + u64 tmpsize; if (OST_LVB_IS_ERR(loi->loi_lvb.lvb_blocks)) { rc = OST_LVB_GET_ERR(loi->loi_lvb.lvb_blocks); @@ -73,7 +72,11 @@ int lov_merge_lvb(struct obd_export *exp, struct lov_stripe_md *lsm, } tmpsize = loi->loi_kms; - if (kms_only == 0 && loi->loi_lvb.lvb_size > tmpsize) + 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); @@ -81,19 +84,21 @@ int lov_merge_lvb(struct obd_export *exp, struct lov_stripe_md *lsm, 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; - - /* mtime is always updated with ctime, but can be set in past. - As write and utime(2) may happen within 1 second, and utime's - mtime has a priority over write's one, leave mtime from mds - for the same ctimes. */ - if (loi->loi_lvb.lvb_ctime > current_ctime) { + if (loi->loi_lvb.lvb_ctime > current_ctime) current_ctime = loi->loi_lvb.lvb_ctime; - current_mtime = loi->loi_lvb.lvb_mtime; - } + + 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; @@ -101,76 +106,3 @@ int lov_merge_lvb(struct obd_export *exp, struct lov_stripe_md *lsm, 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, - obd_off size, int shrink) -{ - struct lov_oinfo *loi; - int stripe = 0; - __u64 kms; - ENTRY; - - LASSERT_SPIN_LOCKED(&lsm->lsm_lock); -#ifdef __KERNEL__ - LASSERT(lsm->lsm_lock_owner == cfs_curproc_pid()); -#endif - - 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 "LPU64"->"LPU64"\n", - stripe, kms > loi->loi_kms ? "increas":"shrink", - loi->loi_kms, kms); - loi->loi_kms = 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 "LPU64"->"LPU64"\n", - stripe, kms > loi->loi_kms ? "" : "not ", loi->loi_kms, kms); - if (kms > loi->loi_kms) - loi->loi_kms = kms; - - RETURN(0); -} - -void lov_merge_attrs(struct obdo *tgt, struct obdo *src, obd_flag 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 */ - obd_size 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; - /* Only mtime from OSTs are merged here, as they cannot be set - in past (only MDS's mtime can) do not look at ctime. */ - if (valid & OBD_MD_FLMTIME && tgt->o_mtime < src->o_mtime) - tgt->o_mtime = src->o_mtime; - } else { - memcpy(tgt, src, sizeof(*tgt)); - tgt->o_id = lsm->lsm_object_id; - if (valid & OBD_MD_FLSIZE) - tgt->o_size = lov_stripe_size(lsm,src->o_size,stripeno); - *set = 1; - } -}