223 lines
6.4 KiB
C
223 lines
6.4 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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* lustre/obdclass/linux/linux-obdo.c
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*
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* Object Devices Class Driver
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* These are the only exported functions, they provide some generic
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* infrastructure for managing object devices
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*/
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#define DEBUG_SUBSYSTEM S_CLASS
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#include <linux/module.h>
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#include <obd_class.h>
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#include <lustre/lustre_idl.h>
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#include <linux/fs.h>
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#include <linux/pagemap.h> /* for PAGE_CACHE_SIZE */
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/*FIXME: Just copy from obdo_from_inode*/
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void obdo_from_la(struct obdo *dst, struct lu_attr *la, __u64 valid)
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{
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obd_flag newvalid = 0;
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if (valid & LA_ATIME) {
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dst->o_atime = la->la_atime;
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newvalid |= OBD_MD_FLATIME;
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}
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if (valid & LA_MTIME) {
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dst->o_mtime = la->la_mtime;
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newvalid |= OBD_MD_FLMTIME;
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}
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if (valid & LA_CTIME) {
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dst->o_ctime = la->la_ctime;
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newvalid |= OBD_MD_FLCTIME;
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}
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if (valid & LA_SIZE) {
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dst->o_size = la->la_size;
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newvalid |= OBD_MD_FLSIZE;
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}
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if (valid & LA_BLOCKS) { /* allocation of space (x512 bytes) */
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dst->o_blocks = la->la_blocks;
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newvalid |= OBD_MD_FLBLOCKS;
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}
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if (valid & LA_TYPE) {
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dst->o_mode = (dst->o_mode & S_IALLUGO) |
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(la->la_mode & S_IFMT);
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newvalid |= OBD_MD_FLTYPE;
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}
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if (valid & LA_MODE) {
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dst->o_mode = (dst->o_mode & S_IFMT) |
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(la->la_mode & S_IALLUGO);
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newvalid |= OBD_MD_FLMODE;
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}
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if (valid & LA_UID) {
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dst->o_uid = la->la_uid;
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newvalid |= OBD_MD_FLUID;
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}
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if (valid & LA_GID) {
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dst->o_gid = la->la_gid;
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newvalid |= OBD_MD_FLGID;
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}
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dst->o_valid |= newvalid;
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}
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EXPORT_SYMBOL(obdo_from_la);
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/*FIXME: Just copy from obdo_from_inode*/
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void la_from_obdo(struct lu_attr *dst, struct obdo *obdo, obd_flag valid)
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{
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__u64 newvalid = 0;
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valid &= obdo->o_valid;
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if (valid & OBD_MD_FLATIME) {
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dst->la_atime = obdo->o_atime;
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newvalid |= LA_ATIME;
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}
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if (valid & OBD_MD_FLMTIME) {
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dst->la_mtime = obdo->o_mtime;
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newvalid |= LA_MTIME;
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}
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if (valid & OBD_MD_FLCTIME) {
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dst->la_ctime = obdo->o_ctime;
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newvalid |= LA_CTIME;
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}
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if (valid & OBD_MD_FLSIZE) {
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dst->la_size = obdo->o_size;
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newvalid |= LA_SIZE;
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}
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if (valid & OBD_MD_FLBLOCKS) {
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dst->la_blocks = obdo->o_blocks;
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newvalid |= LA_BLOCKS;
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}
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if (valid & OBD_MD_FLTYPE) {
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dst->la_mode = (dst->la_mode & S_IALLUGO) |
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(obdo->o_mode & S_IFMT);
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newvalid |= LA_TYPE;
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}
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if (valid & OBD_MD_FLMODE) {
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dst->la_mode = (dst->la_mode & S_IFMT) |
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(obdo->o_mode & S_IALLUGO);
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newvalid |= LA_MODE;
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}
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if (valid & OBD_MD_FLUID) {
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dst->la_uid = obdo->o_uid;
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newvalid |= LA_UID;
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}
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if (valid & OBD_MD_FLGID) {
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dst->la_gid = obdo->o_gid;
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newvalid |= LA_GID;
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}
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dst->la_valid = newvalid;
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}
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EXPORT_SYMBOL(la_from_obdo);
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void obdo_refresh_inode(struct inode *dst, struct obdo *src, obd_flag valid)
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{
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valid &= src->o_valid;
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if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
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CDEBUG(D_INODE,
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"valid "LPX64", cur time %lu/%lu, new "LPU64"/"LPU64"\n",
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src->o_valid, LTIME_S(dst->i_mtime),
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LTIME_S(dst->i_ctime), src->o_mtime, src->o_ctime);
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if (valid & OBD_MD_FLATIME && src->o_atime > LTIME_S(dst->i_atime))
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LTIME_S(dst->i_atime) = src->o_atime;
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if (valid & OBD_MD_FLMTIME && src->o_mtime > LTIME_S(dst->i_mtime))
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LTIME_S(dst->i_mtime) = src->o_mtime;
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if (valid & OBD_MD_FLCTIME && src->o_ctime > LTIME_S(dst->i_ctime))
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LTIME_S(dst->i_ctime) = src->o_ctime;
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if (valid & OBD_MD_FLSIZE)
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i_size_write(dst, src->o_size);
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/* optimum IO size */
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if (valid & OBD_MD_FLBLKSZ && src->o_blksize > (1 << dst->i_blkbits))
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dst->i_blkbits = ffs(src->o_blksize) - 1;
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if (dst->i_blkbits < PAGE_CACHE_SHIFT)
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dst->i_blkbits = PAGE_CACHE_SHIFT;
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/* allocation of space */
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if (valid & OBD_MD_FLBLOCKS && src->o_blocks > dst->i_blocks)
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/*
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* XXX shouldn't overflow be checked here like in
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* obdo_to_inode().
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*/
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dst->i_blocks = src->o_blocks;
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}
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EXPORT_SYMBOL(obdo_refresh_inode);
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void obdo_to_inode(struct inode *dst, struct obdo *src, obd_flag valid)
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{
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valid &= src->o_valid;
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LASSERTF(!(valid & (OBD_MD_FLTYPE | OBD_MD_FLGENER | OBD_MD_FLFID |
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OBD_MD_FLID | OBD_MD_FLGROUP)),
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"object "DOSTID", valid %x\n", POSTID(&src->o_oi), valid);
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if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
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CDEBUG(D_INODE,
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"valid "LPX64", cur time %lu/%lu, new "LPU64"/"LPU64"\n",
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src->o_valid, LTIME_S(dst->i_mtime),
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LTIME_S(dst->i_ctime), src->o_mtime, src->o_ctime);
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if (valid & OBD_MD_FLATIME)
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LTIME_S(dst->i_atime) = src->o_atime;
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if (valid & OBD_MD_FLMTIME)
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LTIME_S(dst->i_mtime) = src->o_mtime;
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if (valid & OBD_MD_FLCTIME && src->o_ctime > LTIME_S(dst->i_ctime))
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LTIME_S(dst->i_ctime) = src->o_ctime;
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if (valid & OBD_MD_FLSIZE)
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i_size_write(dst, src->o_size);
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if (valid & OBD_MD_FLBLOCKS) { /* allocation of space */
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dst->i_blocks = src->o_blocks;
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if (dst->i_blocks < src->o_blocks) /* overflow */
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dst->i_blocks = -1;
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}
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if (valid & OBD_MD_FLBLKSZ)
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dst->i_blkbits = ffs(src->o_blksize)-1;
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if (valid & OBD_MD_FLMODE)
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dst->i_mode = (dst->i_mode & S_IFMT) | (src->o_mode & ~S_IFMT);
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if (valid & OBD_MD_FLUID)
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dst->i_uid = make_kuid(&init_user_ns, src->o_uid);
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if (valid & OBD_MD_FLGID)
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dst->i_gid = make_kgid(&init_user_ns, src->o_gid);
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if (valid & OBD_MD_FLFLAGS)
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dst->i_flags = src->o_flags;
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}
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EXPORT_SYMBOL(obdo_to_inode);
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