[linux-2.6-block.git] / drivers / staging / lustre / lustre / obdclass / obdo.c

/*
 * 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.gnu.org/licenses/gpl-2.0.html
 *
 * GPL HEADER END
 */
/*
 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
 * Use is subject to license terms.
 *
 * Copyright (c) 2011, 2012, 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 "../include/obd_class.h"
#include "../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, u32 valid)
{
	u32 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 = 1 << 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_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);

static void iattr_from_obdo(struct iattr *attr, struct obdo *oa, u32 valid)
{
	valid &= oa->o_valid;

	if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
		CDEBUG(D_INODE, "valid %#llx, new time %llu/%llu\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(make_kgid(&init_user_ns, oa->o_gid)) &&
		    !capable(CFS_CAP_FSETID))
			attr->ia_mode &= ~S_ISGID;
	}
	if (valid & OBD_MD_FLUID) {
		attr->ia_uid = make_kuid(&init_user_ns, oa->o_uid);
		attr->ia_valid |= ATTR_UID;
	}
	if (valid & OBD_MD_FLGID) {
		attr->ia_gid = make_kgid(&init_user_ns, oa->o_gid);
		attr->ia_valid |= ATTR_GID;
	}
}

void md_from_obdo(struct md_op_data *op_data, struct obdo *oa, u32 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) {
		op_data->op_attr_flags = oa->o_flags;
		op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
	}
}
EXPORT_SYMBOL(md_from_obdo);
Commit	Line	Data
d7e09d03 PT	1	/*
	2	* GPL HEADER START
	3	*
	4	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 only,
	8	* as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful, but
	11	* WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	* General Public License version 2 for more details (a copy is included
	14	* in the LICENSE file that accompanied this code).
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* version 2 along with this program; If not, see
6a5b99a4	18	* http://www.gnu.org/licenses/gpl-2.0.html
d7e09d03	19	*
d7e09d03 PT	20	* GPL HEADER END
	21	*/
	22	/*
	23	* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
	24	* Use is subject to license terms.
	25	*
	26	* Copyright (c) 2011, 2012, Intel Corporation.
	27	*/
	28	/*
	29	* This file is part of Lustre, http://www.lustre.org/
	30	* Lustre is a trademark of Sun Microsystems, Inc.
	31	*
	32	* lustre/obdclass/obdo.c
	33	*
	34	* Object Devices Class Driver
	35	* These are the only exported functions, they provide some generic
	36	* infrastructure for managing object devices
	37	*/
	38
	39	#define DEBUG_SUBSYSTEM S_CLASS
	40
610f7377 GKH	41	#include "../include/obd_class.h"
610f7377 GKH	42	#include "../include/lustre/lustre_idl.h"
d7e09d03 PT	43
	44	void obdo_set_parent_fid(struct obdo dst, const struct lu_fid parent)
	45	{
	46	dst->o_parent_oid = fid_oid(parent);
	47	dst->o_parent_seq = fid_seq(parent);
	48	dst->o_parent_ver = fid_ver(parent);
	49	dst->o_valid \|= OBD_MD_FLGENER \| OBD_MD_FLFID;
	50	}
	51	EXPORT_SYMBOL(obdo_set_parent_fid);
	52
	53	/* WARNING: the file systems must take care not to tinker with
6ba59179 OD	54	* attributes they don't manage (such as blocks).
6ba59179 OD	55	*/
21aef7d9	56	void obdo_from_inode(struct obdo dst, struct inode src, u32 valid)
d7e09d03	57	{
21aef7d9	58	u32 newvalid = 0;
d7e09d03 PT	59
	60	if (valid & (OBD_MD_FLCTIME \| OBD_MD_FLMTIME))
	61	CDEBUG(D_INODE, "valid %x, new time %lu/%lu\n",
	62	valid, LTIME_S(src->i_mtime),
	63	LTIME_S(src->i_ctime));
	64
	65	if (valid & OBD_MD_FLATIME) {
	66	dst->o_atime = LTIME_S(src->i_atime);
	67	newvalid \|= OBD_MD_FLATIME;
	68	}
	69	if (valid & OBD_MD_FLMTIME) {
	70	dst->o_mtime = LTIME_S(src->i_mtime);
	71	newvalid \|= OBD_MD_FLMTIME;
	72	}
	73	if (valid & OBD_MD_FLCTIME) {
	74	dst->o_ctime = LTIME_S(src->i_ctime);
	75	newvalid \|= OBD_MD_FLCTIME;
	76	}
	77	if (valid & OBD_MD_FLSIZE) {
	78	dst->o_size = i_size_read(src);
	79	newvalid \|= OBD_MD_FLSIZE;
	80	}
	81	if (valid & OBD_MD_FLBLOCKS) { /* allocation of space (x512 bytes) */
	82	dst->o_blocks = src->i_blocks;
	83	newvalid \|= OBD_MD_FLBLOCKS;
	84	}
	85	if (valid & OBD_MD_FLBLKSZ) { /* optimal block size */
16e0631d	86	dst->o_blksize = 1 << src->i_blkbits;
d7e09d03 PT	87	newvalid \|= OBD_MD_FLBLKSZ;
	88	}
	89	if (valid & OBD_MD_FLTYPE) {
	90	dst->o_mode = (dst->o_mode & S_IALLUGO) \|
	91	(src->i_mode & S_IFMT);
	92	newvalid \|= OBD_MD_FLTYPE;
	93	}
	94	if (valid & OBD_MD_FLMODE) {
	95	dst->o_mode = (dst->o_mode & S_IFMT) \|
	96	(src->i_mode & S_IALLUGO);
	97	newvalid \|= OBD_MD_FLMODE;
	98	}
	99	if (valid & OBD_MD_FLUID) {
4b1a25f0	100	dst->o_uid = from_kuid(&init_user_ns, src->i_uid);
d7e09d03 PT	101	newvalid \|= OBD_MD_FLUID;
	102	}
	103	if (valid & OBD_MD_FLGID) {
4b1a25f0	104	dst->o_gid = from_kgid(&init_user_ns, src->i_gid);
d7e09d03 PT	105	newvalid \|= OBD_MD_FLGID;
	106	}
	107	if (valid & OBD_MD_FLFLAGS) {
616331c3	108	dst->o_flags = src->i_flags;
d7e09d03 PT	109	newvalid \|= OBD_MD_FLFLAGS;
	110	}
	111	dst->o_valid \|= newvalid;
	112	}
	113	EXPORT_SYMBOL(obdo_from_inode);
	114
d7e09d03 PT	115	void obdo_to_ioobj(struct obdo oa, struct obd_ioobj ioobj)
	116	{
	117	ioobj->ioo_oid = oa->o_oi;
	118	if (unlikely(!(oa->o_valid & OBD_MD_FLGROUP)))
	119	ostid_set_seq_mdt0(&ioobj->ioo_oid);
	120
	121	/* Since 2.4 this does not contain o_mode in the low 16 bits.
6ba59179 OD	122	* Instead, it holds (bd_md_max_brw - 1) for multi-bulk BRW RPCs
6ba59179 OD	123	*/
d7e09d03 PT	124	ioobj->ioo_max_brw = 0;
	125	}
	126	EXPORT_SYMBOL(obdo_to_ioobj);
	127
b4380006	128	static void iattr_from_obdo(struct iattr attr, struct obdo oa, u32 valid)
d7e09d03 PT	129	{
	130	valid &= oa->o_valid;
	131
	132	if (valid & (OBD_MD_FLCTIME \| OBD_MD_FLMTIME))
55f5a824	133	CDEBUG(D_INODE, "valid %#llx, new time %llu/%llu\n",
d7e09d03 PT	134	oa->o_valid, oa->o_mtime, oa->o_ctime);
	135
	136	attr->ia_valid = 0;
	137	if (valid & OBD_MD_FLATIME) {
	138	LTIME_S(attr->ia_atime) = oa->o_atime;
	139	attr->ia_valid \|= ATTR_ATIME;
	140	}
	141	if (valid & OBD_MD_FLMTIME) {
	142	LTIME_S(attr->ia_mtime) = oa->o_mtime;
	143	attr->ia_valid \|= ATTR_MTIME;
	144	}
	145	if (valid & OBD_MD_FLCTIME) {
	146	LTIME_S(attr->ia_ctime) = oa->o_ctime;
	147	attr->ia_valid \|= ATTR_CTIME;
	148	}
	149	if (valid & OBD_MD_FLSIZE) {
	150	attr->ia_size = oa->o_size;
	151	attr->ia_valid \|= ATTR_SIZE;
	152	}
	153	#if 0 /* you shouldn't be able to change a file's type with setattr */
	154	if (valid & OBD_MD_FLTYPE) {
	155	attr->ia_mode = (attr->ia_mode & ~S_IFMT)\|(oa->o_mode & S_IFMT);
	156	attr->ia_valid \|= ATTR_MODE;
	157	}
	158	#endif
	159	if (valid & OBD_MD_FLMODE) {
	160	attr->ia_mode = (attr->ia_mode & S_IFMT)\|(oa->o_mode & ~S_IFMT);
	161	attr->ia_valid \|= ATTR_MODE;
4b1a25f0	162	if (!in_group_p(make_kgid(&init_user_ns, oa->o_gid)) &&
2eb90a75	163	!capable(CFS_CAP_FSETID))
d7e09d03 PT	164	attr->ia_mode &= ~S_ISGID;
	165	}
	166	if (valid & OBD_MD_FLUID) {
4b1a25f0	167	attr->ia_uid = make_kuid(&init_user_ns, oa->o_uid);
d7e09d03 PT	168	attr->ia_valid \|= ATTR_UID;
	169	}
	170	if (valid & OBD_MD_FLGID) {
4b1a25f0	171	attr->ia_gid = make_kgid(&init_user_ns, oa->o_gid);
d7e09d03 PT	172	attr->ia_valid \|= ATTR_GID;
	173	}
	174	}
d7e09d03	175
21aef7d9	176	void md_from_obdo(struct md_op_data op_data, struct obdo oa, u32 valid)
d7e09d03 PT	177	{
	178	iattr_from_obdo(&op_data->op_attr, oa, valid);
	179	if (valid & OBD_MD_FLBLOCKS) {
	180	op_data->op_attr_blocks = oa->o_blocks;
	181	op_data->op_attr.ia_valid \|= ATTR_BLOCKS;
	182	}
	183	if (valid & OBD_MD_FLFLAGS) {
bb41292b	184	op_data->op_attr_flags = oa->o_flags;
d7e09d03 PT	185	op_data->op_attr.ia_valid \|= ATTR_ATTR_FLAG;
	186	}
	187	}
	188	EXPORT_SYMBOL(md_from_obdo);