/* * 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 #ifdef __KERNEL__ #include #else #include #endif #include #include #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; obd_time current_mtime = lvb->lvb_mtime; obd_time current_atime = lvb->lvb_atime; obd_time 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 CDEBUG(D_INODE, "MDT ID "DOSTID" initial value: s="LPU64" m="LPU64 " a="LPU64" c="LPU64" b="LPU64"\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]; obd_size 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="LPU64" m="LPU64 " a="LPU64" c="LPU64" b="LPU64"\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); } /** 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 \a 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) { int rc; __u64 kms; ENTRY; lov_stripe_lock(lsm); rc = lov_merge_lvb_kms(lsm, lvb, &kms); lov_stripe_unlock(lsm); if (kms_only) lvb->lvb_size = kms; CDEBUG(D_INODE, "merged for ID "DOSTID" s="LPU64" m="LPU64" a="LPU64 " c="LPU64" b="LPU64"\n", POSTID(&lsm->lsm_oi), lvb->lvb_size, lvb->lvb_mtime, lvb->lvb_atime, lvb->lvb_ctime, lvb->lvb_blocks); 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_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 "LPU64"->"LPU64"\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, obd_valid 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; 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; }