/*
 * 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, 2013, 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

#ifndef __KERNEL__
#include "../liblustre/llite_lib.h"
#else
#include <obd_class.h>
#include <lustre/lustre_idl.h>
#endif

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, obd_flag valid)
{
        obd_flag newvalid = 0;

        if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
                CDEBUG(D_INODE, "valid %x, 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 = ll_inode_blksize(src);
                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 = src->i_uid;
                newvalid |= OBD_MD_FLUID;
        }
        if (valid & OBD_MD_FLGID) {
                dst->o_gid = src->i_gid;
                newvalid |= OBD_MD_FLGID;
        }
        if (valid & OBD_MD_FLFLAGS) {
                dst->o_flags = ll_inode_flags(src);
                newvalid |= OBD_MD_FLFLAGS;
        }
        dst->o_valid |= newvalid;
}
EXPORT_SYMBOL(obdo_from_inode);

void obdo_cpy_md(struct obdo *dst, struct obdo *src, obd_flag valid)
{
#ifdef __KERNEL__
        CDEBUG(D_INODE, "src obdo "DOSTID" valid "LPX64", dst obdo "DOSTID"\n",
               POSTID(&src->o_oi), src->o_valid, POSTID(&dst->o_oi));
#endif
        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;
        if (valid & OBD_MD_FLCOOKIE)
                dst->o_lcookie = src->o_lcookie;

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

/* returns FALSE if comparison (by flags) is same, TRUE if changed */
int obdo_cmp_md(struct obdo *dst, struct obdo *src, obd_flag compare)
{
        int res = 0;

        if ( compare & OBD_MD_FLATIME )
                res = (res || (dst->o_atime != src->o_atime));
        if ( compare & OBD_MD_FLMTIME )
                res = (res || (dst->o_mtime != src->o_mtime));
        if ( compare & OBD_MD_FLCTIME )
                res = (res || (dst->o_ctime != src->o_ctime));
        if ( compare & OBD_MD_FLSIZE )
                res = (res || (dst->o_size != src->o_size));
        if ( compare & OBD_MD_FLBLOCKS ) /* allocation of space */
                res = (res || (dst->o_blocks != src->o_blocks));
        if ( compare & OBD_MD_FLBLKSZ )
                res = (res || (dst->o_blksize != src->o_blksize));
        if ( compare & OBD_MD_FLTYPE )
                res = (res || (((dst->o_mode ^ src->o_mode) & S_IFMT) != 0));
        if ( compare & OBD_MD_FLMODE )
                res = (res || (((dst->o_mode ^ src->o_mode) & ~S_IFMT) != 0));
        if ( compare & OBD_MD_FLUID )
                res = (res || (dst->o_uid != src->o_uid));
        if ( compare & OBD_MD_FLGID )
                res = (res || (dst->o_gid != src->o_gid));
        if ( compare & OBD_MD_FLFLAGS )
                res = (res || (dst->o_flags != src->o_flags));
        if ( compare & OBD_MD_FLNLINK )
                res = (res || (dst->o_nlink != src->o_nlink));
        if ( compare & OBD_MD_FLFID ) {
                res = (res || (dst->o_parent_seq != src->o_parent_seq));
                res = (res || (dst->o_parent_ver != src->o_parent_ver));
        }
        if ( compare & OBD_MD_FLGENER )
                res = (res || (dst->o_parent_oid != src->o_parent_oid));
        /* XXX Don't know if thses should be included here - wasn't previously
        if ( compare & OBD_MD_FLINLINE )
                res = (res || memcmp(dst->o_inline, src->o_inline));
        */
        return res;
}
EXPORT_SYMBOL(obdo_cmp_md);

void obdo_to_ioobj(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);

void obdo_from_iattr(struct obdo *oa, struct iattr *attr, unsigned int ia_valid)
{
        if (ia_valid & ATTR_ATIME) {
                oa->o_atime = LTIME_S(attr->ia_atime);
                oa->o_valid |= OBD_MD_FLATIME;
        }
        if (ia_valid & ATTR_MTIME) {
                oa->o_mtime = LTIME_S(attr->ia_mtime);
                oa->o_valid |= OBD_MD_FLMTIME;
        }
        if (ia_valid & ATTR_CTIME) {
                oa->o_ctime = LTIME_S(attr->ia_ctime);
                oa->o_valid |= OBD_MD_FLCTIME;
        }
        if (ia_valid & ATTR_SIZE) {
                oa->o_size = attr->ia_size;
                oa->o_valid |= OBD_MD_FLSIZE;
        }
	if (ia_valid & ATTR_MODE) {
		oa->o_mode = attr->ia_mode;
		oa->o_valid |= OBD_MD_FLTYPE | OBD_MD_FLMODE;
		if (!in_group_p(oa->o_gid) &&
		    !cfs_capable(CFS_CAP_FSETID))
			oa->o_mode &= ~S_ISGID;
	}
        if (ia_valid & ATTR_UID) {
                oa->o_uid = attr->ia_uid;
                oa->o_valid |= OBD_MD_FLUID;
        }
        if (ia_valid & ATTR_GID) {
                oa->o_gid = attr->ia_gid;
                oa->o_valid |= OBD_MD_FLGID;
        }
}
EXPORT_SYMBOL(obdo_from_iattr);

void iattr_from_obdo(struct iattr *attr, struct obdo *oa, obd_flag valid)
{
        valid &= oa->o_valid;

        if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
                CDEBUG(D_INODE, "valid "LPX64", new time "LPU64"/"LPU64"\n",
                       oa->o_valid, oa->o_mtime, oa->o_ctime);

        attr->ia_valid = 0;
        if (valid & OBD_MD_FLATIME) {
                LTIME_S(attr->ia_atime) = oa->o_atime;
                attr->ia_valid |= ATTR_ATIME;
        }
        if (valid & OBD_MD_FLMTIME) {
                LTIME_S(attr->ia_mtime) = oa->o_mtime;
                attr->ia_valid |= ATTR_MTIME;
        }
        if (valid & OBD_MD_FLCTIME) {
                LTIME_S(attr->ia_ctime) = oa->o_ctime;
                attr->ia_valid |= ATTR_CTIME;
        }
        if (valid & OBD_MD_FLSIZE) {
                attr->ia_size = oa->o_size;
                attr->ia_valid |= ATTR_SIZE;
        }
#if 0   /* you shouldn't be able to change a file's type with setattr */
        if (valid & OBD_MD_FLTYPE) {
                attr->ia_mode = (attr->ia_mode & ~S_IFMT)|(oa->o_mode & S_IFMT);
                attr->ia_valid |= ATTR_MODE;
        }
#endif
        if (valid & OBD_MD_FLMODE) {
		attr->ia_mode = (attr->ia_mode & S_IFMT)|(oa->o_mode & ~S_IFMT);
		attr->ia_valid |= ATTR_MODE;
		if (!in_group_p(oa->o_gid) &&
		    !cfs_capable(CFS_CAP_FSETID))
			attr->ia_mode &= ~S_ISGID;
        }
        if (valid & OBD_MD_FLUID) {
                attr->ia_uid = oa->o_uid;
                attr->ia_valid |= ATTR_UID;
        }
        if (valid & OBD_MD_FLGID) {
                attr->ia_gid = oa->o_gid;
                attr->ia_valid |= ATTR_GID;
        }
}
EXPORT_SYMBOL(iattr_from_obdo);

void md_from_obdo(struct md_op_data *op_data, struct obdo *oa, obd_flag valid)
{
        iattr_from_obdo(&op_data->op_attr, oa, valid);
        if (valid & OBD_MD_FLBLOCKS) {
                op_data->op_attr_blocks = oa->o_blocks;
                op_data->op_attr.ia_valid |= ATTR_BLOCKS;
        }
        if (valid & OBD_MD_FLFLAGS) {
                ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags =
                        oa->o_flags;
                op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
        }
}
EXPORT_SYMBOL(md_from_obdo);

void obdo_from_md(struct obdo *oa, struct md_op_data *op_data,
                  unsigned int valid)
{
        obdo_from_iattr(oa, &op_data->op_attr, valid);
        if (valid & ATTR_BLOCKS) {
                oa->o_blocks = op_data->op_attr_blocks;
                oa->o_valid |= OBD_MD_FLBLOCKS;
        }
        if (valid & ATTR_ATTR_FLAG) {
                oa->o_flags = 
                        ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags;
                oa->o_valid |= OBD_MD_FLFLAGS;
        }
}
EXPORT_SYMBOL(obdo_from_md);

void obdo_cpu_to_le(struct obdo *dobdo, struct obdo *sobdo)
{
	dobdo->o_size = cpu_to_le64(sobdo->o_size);
	dobdo->o_mtime = cpu_to_le64(sobdo->o_mtime);
	dobdo->o_atime = cpu_to_le64(sobdo->o_atime);
	dobdo->o_ctime = cpu_to_le64(sobdo->o_ctime);
	dobdo->o_blocks = cpu_to_le64(sobdo->o_blocks);
	dobdo->o_mode = cpu_to_le32(sobdo->o_mode);
	dobdo->o_uid = cpu_to_le32(sobdo->o_uid);
	dobdo->o_gid = cpu_to_le32(sobdo->o_gid);
	dobdo->o_flags = cpu_to_le32(sobdo->o_flags);
	dobdo->o_nlink = cpu_to_le32(sobdo->o_nlink);
	dobdo->o_blksize = cpu_to_le32(sobdo->o_blksize);
	dobdo->o_valid = cpu_to_le64(sobdo->o_valid);
}
EXPORT_SYMBOL(obdo_cpu_to_le);

void obdo_le_to_cpu(struct obdo *dobdo, struct obdo *sobdo)
{
	dobdo->o_size = le64_to_cpu(sobdo->o_size);
	dobdo->o_mtime = le64_to_cpu(sobdo->o_mtime);
	dobdo->o_atime = le64_to_cpu(sobdo->o_atime);
	dobdo->o_ctime = le64_to_cpu(sobdo->o_ctime);
	dobdo->o_blocks = le64_to_cpu(sobdo->o_blocks);
	dobdo->o_mode = le32_to_cpu(sobdo->o_mode);
	dobdo->o_uid = le32_to_cpu(sobdo->o_uid);
	dobdo->o_gid = le32_to_cpu(sobdo->o_gid);
	dobdo->o_flags = le32_to_cpu(sobdo->o_flags);
	dobdo->o_nlink = le32_to_cpu(sobdo->o_nlink);
	dobdo->o_blksize = le32_to_cpu(sobdo->o_blksize);
	dobdo->o_valid = le64_to_cpu(sobdo->o_valid);
}
EXPORT_SYMBOL(obdo_le_to_cpu);