86 lines
2.8 KiB
C
86 lines
2.8 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 "../../include/obd_class.h"
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#include "../../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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void obdo_refresh_inode(struct inode *dst, struct obdo *src, u32 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 %#llx, cur time %lu/%lu, new %llu/%llu\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_SHIFT)
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dst->i_blkbits = PAGE_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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