/*
 * 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) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
 * Use is subject to license terms.
 *
 * Copyright (c) 2012, 2014, Intel Corporation.
 */
/*
 * This file is part of Lustre, http://www.lustre.org/
 * Lustre is a trademark of Sun Microsystems, Inc.
 *
 * lustre/obdclass/obdo.c
 *
 * Object Devices Class Driver
 * These are the only exported functions, they provide some generic
 * infrastructure for managing object devices
 */

#define DEBUG_SUBSYSTEM S_CLASS

#include <linux/user_namespace.h>
#ifdef HAVE_UIDGID_HEADER
# include <linux/uidgid.h>
#endif
#include <obd_class.h>
#include <lustre/lustre_idl.h>

void obdo_set_parent_fid(struct obdo *dst, const struct lu_fid *parent)
{
        dst->o_parent_oid = fid_oid(parent);
        dst->o_parent_seq = fid_seq(parent);
        dst->o_parent_ver = fid_ver(parent);
        dst->o_valid |= OBD_MD_FLGENER | OBD_MD_FLFID;
}
EXPORT_SYMBOL(obdo_set_parent_fid);

/* WARNING: the file systems must take care not to tinker with
   attributes they don't manage (such as blocks). */
void obdo_from_inode(struct obdo *dst, struct inode *src, u64 valid)
{
	u64 newvalid = 0;

	if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
		CDEBUG(D_INODE, "valid "LPX64", new time %lu/%lu\n",
			valid, LTIME_S(src->i_mtime),
			LTIME_S(src->i_ctime));

        if (valid & OBD_MD_FLATIME) {
                dst->o_atime = LTIME_S(src->i_atime);
                newvalid |= OBD_MD_FLATIME;
        }
        if (valid & OBD_MD_FLMTIME) {
                dst->o_mtime = LTIME_S(src->i_mtime);
                newvalid |= OBD_MD_FLMTIME;
        }
        if (valid & OBD_MD_FLCTIME) {
                dst->o_ctime = LTIME_S(src->i_ctime);
                newvalid |= OBD_MD_FLCTIME;
        }
        if (valid & OBD_MD_FLSIZE) {
                dst->o_size = i_size_read(src);
                newvalid |= OBD_MD_FLSIZE;
        }
        if (valid & OBD_MD_FLBLOCKS) {  /* allocation of space (x512 bytes) */
                dst->o_blocks = src->i_blocks;
                newvalid |= OBD_MD_FLBLOCKS;
        }
        if (valid & OBD_MD_FLBLKSZ) {   /* optimal block size */
		dst->o_blksize = 1U << src->i_blkbits;
                newvalid |= OBD_MD_FLBLKSZ;
        }
        if (valid & OBD_MD_FLTYPE) {
                dst->o_mode = (dst->o_mode & S_IALLUGO) |
                              (src->i_mode & S_IFMT);
                newvalid |= OBD_MD_FLTYPE;
        }
        if (valid & OBD_MD_FLMODE) {
                dst->o_mode = (dst->o_mode & S_IFMT) |
                              (src->i_mode & S_IALLUGO);
                newvalid |= OBD_MD_FLMODE;
        }
	if (valid & OBD_MD_FLUID) {
		dst->o_uid = from_kuid(&init_user_ns, src->i_uid);
		newvalid |= OBD_MD_FLUID;
	}
	if (valid & OBD_MD_FLGID) {
		dst->o_gid = from_kgid(&init_user_ns, src->i_gid);
		newvalid |= OBD_MD_FLGID;
	}
	if (valid & OBD_MD_FLFLAGS) {
		dst->o_flags = src->i_flags;
		newvalid |= OBD_MD_FLFLAGS;
	}
	dst->o_valid |= newvalid;
}
EXPORT_SYMBOL(obdo_from_inode);

void obdo_cpy_md(struct obdo *dst, const struct obdo *src, u64 valid)
{
        CDEBUG(D_INODE, "src obdo "DOSTID" valid "LPX64", dst obdo "DOSTID"\n",
               POSTID(&src->o_oi), src->o_valid, POSTID(&dst->o_oi));
        if (valid & OBD_MD_FLATIME)
                dst->o_atime = src->o_atime;
        if (valid & OBD_MD_FLMTIME)
                dst->o_mtime = src->o_mtime;
        if (valid & OBD_MD_FLCTIME)
                dst->o_ctime = src->o_ctime;
        if (valid & OBD_MD_FLSIZE)
                dst->o_size = src->o_size;
        if (valid & OBD_MD_FLBLOCKS) /* allocation of space */
                dst->o_blocks = src->o_blocks;
        if (valid & OBD_MD_FLBLKSZ)
                dst->o_blksize = src->o_blksize;
        if (valid & OBD_MD_FLTYPE)
                dst->o_mode = (dst->o_mode & ~S_IFMT) | (src->o_mode & S_IFMT);
        if (valid & OBD_MD_FLMODE)
                dst->o_mode = (dst->o_mode & S_IFMT) | (src->o_mode & ~S_IFMT);
        if (valid & OBD_MD_FLUID)
                dst->o_uid = src->o_uid;
        if (valid & OBD_MD_FLGID)
                dst->o_gid = src->o_gid;
        if (valid & OBD_MD_FLFLAGS)
                dst->o_flags = src->o_flags;
        if (valid & OBD_MD_FLFID) {
                dst->o_parent_seq = src->o_parent_seq;
                dst->o_parent_ver = src->o_parent_ver;
        }
        if (valid & OBD_MD_FLGENER)
                dst->o_parent_oid = src->o_parent_oid;
        if (valid & OBD_MD_FLHANDLE)
                dst->o_handle = src->o_handle;

        dst->o_valid |= valid;
}
EXPORT_SYMBOL(obdo_cpy_md);

void obdo_to_ioobj(const struct obdo *oa, struct obd_ioobj *ioobj)
{
	ioobj->ioo_oid = oa->o_oi;
	if (unlikely(!(oa->o_valid & OBD_MD_FLGROUP)))
		ostid_set_seq_mdt0(&ioobj->ioo_oid);

	/* Since 2.4 this does not contain o_mode in the low 16 bits.
	 * Instead, it holds (bd_md_max_brw - 1) for multi-bulk BRW RPCs */
	ioobj->ioo_max_brw = 0;
}
EXPORT_SYMBOL(obdo_to_ioobj);