[deliverable/linux.git] / drivers / staging / lustre / lustre / obdclass / linux / linux-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.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) 2007, 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/linux/linux-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/module.h>
#include "../../include/obd_class.h"
#include "../../include/lustre/lustre_idl.h"

#include <linux/fs.h>
#include <linux/pagemap.h> /* for PAGE_CACHE_SIZE */

/*FIXME: Just copy from obdo_from_inode*/
void obdo_from_la(struct obdo *dst, struct lu_attr *la, __u64 valid)
{
	obd_flag newvalid = 0;

	if (valid & LA_ATIME) {
		dst->o_atime = la->la_atime;
		newvalid |= OBD_MD_FLATIME;
	}
	if (valid & LA_MTIME) {
		dst->o_mtime = la->la_mtime;
		newvalid |= OBD_MD_FLMTIME;
	}
	if (valid & LA_CTIME) {
		dst->o_ctime = la->la_ctime;
		newvalid |= OBD_MD_FLCTIME;
	}
	if (valid & LA_SIZE) {
		dst->o_size = la->la_size;
		newvalid |= OBD_MD_FLSIZE;
	}
	if (valid & LA_BLOCKS) {  /* allocation of space (x512 bytes) */
		dst->o_blocks = la->la_blocks;
		newvalid |= OBD_MD_FLBLOCKS;
	}
	if (valid & LA_TYPE) {
		dst->o_mode = (dst->o_mode & S_IALLUGO) |
			      (la->la_mode & S_IFMT);
		newvalid |= OBD_MD_FLTYPE;
	}
	if (valid & LA_MODE) {
		dst->o_mode = (dst->o_mode & S_IFMT) |
			      (la->la_mode & S_IALLUGO);
		newvalid |= OBD_MD_FLMODE;
	}
	if (valid & LA_UID) {
		dst->o_uid = la->la_uid;
		newvalid |= OBD_MD_FLUID;
	}
	if (valid & LA_GID) {
		dst->o_gid = la->la_gid;
		newvalid |= OBD_MD_FLGID;
	}
	dst->o_valid |= newvalid;
}
EXPORT_SYMBOL(obdo_from_la);

/*FIXME: Just copy from obdo_from_inode*/
void la_from_obdo(struct lu_attr *dst, struct obdo *obdo, obd_flag valid)
{
	__u64 newvalid = 0;

	valid &= obdo->o_valid;

	if (valid & OBD_MD_FLATIME) {
		dst->la_atime = obdo->o_atime;
		newvalid |= LA_ATIME;
	}
	if (valid & OBD_MD_FLMTIME) {
		dst->la_mtime = obdo->o_mtime;
		newvalid |= LA_MTIME;
	}
	if (valid & OBD_MD_FLCTIME) {
		dst->la_ctime = obdo->o_ctime;
		newvalid |= LA_CTIME;
	}
	if (valid & OBD_MD_FLSIZE) {
		dst->la_size = obdo->o_size;
		newvalid |= LA_SIZE;
	}
	if (valid & OBD_MD_FLBLOCKS) {
		dst->la_blocks = obdo->o_blocks;
		newvalid |= LA_BLOCKS;
	}
	if (valid & OBD_MD_FLTYPE) {
		dst->la_mode = (dst->la_mode & S_IALLUGO) |
			       (obdo->o_mode & S_IFMT);
		newvalid |= LA_TYPE;
	}
	if (valid & OBD_MD_FLMODE) {
		dst->la_mode = (dst->la_mode & S_IFMT) |
			       (obdo->o_mode & S_IALLUGO);
		newvalid |= LA_MODE;
	}
	if (valid & OBD_MD_FLUID) {
		dst->la_uid = obdo->o_uid;
		newvalid |= LA_UID;
	}
	if (valid & OBD_MD_FLGID) {
		dst->la_gid = obdo->o_gid;
		newvalid |= LA_GID;
	}
	dst->la_valid = newvalid;
}
EXPORT_SYMBOL(la_from_obdo);

void obdo_refresh_inode(struct inode *dst, struct obdo *src, obd_flag valid)
{
	valid &= src->o_valid;

	if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
		CDEBUG(D_INODE,
		       "valid %#llx, cur time %lu/%lu, new %llu/%llu\n",
		       src->o_valid, LTIME_S(dst->i_mtime),
		       LTIME_S(dst->i_ctime), src->o_mtime, src->o_ctime);

	if (valid & OBD_MD_FLATIME && src->o_atime > LTIME_S(dst->i_atime))
		LTIME_S(dst->i_atime) = src->o_atime;
	if (valid & OBD_MD_FLMTIME && src->o_mtime > LTIME_S(dst->i_mtime))
		LTIME_S(dst->i_mtime) = src->o_mtime;
	if (valid & OBD_MD_FLCTIME && src->o_ctime > LTIME_S(dst->i_ctime))
		LTIME_S(dst->i_ctime) = src->o_ctime;
	if (valid & OBD_MD_FLSIZE)
		i_size_write(dst, src->o_size);
	/* optimum IO size */
	if (valid & OBD_MD_FLBLKSZ && src->o_blksize > (1 << dst->i_blkbits))
		dst->i_blkbits = ffs(src->o_blksize) - 1;

	if (dst->i_blkbits < PAGE_CACHE_SHIFT)
		dst->i_blkbits = PAGE_CACHE_SHIFT;

	/* allocation of space */
	if (valid & OBD_MD_FLBLOCKS && src->o_blocks > dst->i_blocks)
		/*
		 * XXX shouldn't overflow be checked here like in
		 * obdo_to_inode().
		 */
		dst->i_blocks = src->o_blocks;
}
EXPORT_SYMBOL(obdo_refresh_inode);

void obdo_to_inode(struct inode *dst, struct obdo *src, obd_flag valid)
{
	valid &= src->o_valid;

	LASSERTF(!(valid & (OBD_MD_FLTYPE | OBD_MD_FLGENER | OBD_MD_FLFID |
			    OBD_MD_FLID | OBD_MD_FLGROUP)),
		 "object "DOSTID", valid %x\n", POSTID(&src->o_oi), valid);

	if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
		CDEBUG(D_INODE,
		       "valid %#llx, cur time %lu/%lu, new %llu/%llu\n",
		       src->o_valid, LTIME_S(dst->i_mtime),
		       LTIME_S(dst->i_ctime), src->o_mtime, src->o_ctime);

	if (valid & OBD_MD_FLATIME)
		LTIME_S(dst->i_atime) = src->o_atime;
	if (valid & OBD_MD_FLMTIME)
		LTIME_S(dst->i_mtime) = src->o_mtime;
	if (valid & OBD_MD_FLCTIME && src->o_ctime > LTIME_S(dst->i_ctime))
		LTIME_S(dst->i_ctime) = src->o_ctime;
	if (valid & OBD_MD_FLSIZE)
		i_size_write(dst, src->o_size);
	if (valid & OBD_MD_FLBLOCKS) { /* allocation of space */
		dst->i_blocks = src->o_blocks;
		if (dst->i_blocks < src->o_blocks) /* overflow */
			dst->i_blocks = -1;

	}
	if (valid & OBD_MD_FLBLKSZ)
		dst->i_blkbits = ffs(src->o_blksize)-1;
	if (valid & OBD_MD_FLMODE)
		dst->i_mode = (dst->i_mode & S_IFMT) | (src->o_mode & ~S_IFMT);
	if (valid & OBD_MD_FLUID)
		dst->i_uid = make_kuid(&init_user_ns, src->o_uid);
	if (valid & OBD_MD_FLGID)
		dst->i_gid = make_kgid(&init_user_ns, src->o_gid);
	if (valid & OBD_MD_FLFLAGS)
		dst->i_flags = src->o_flags;
}
EXPORT_SYMBOL(obdo_to_inode);
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
	18	* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
	19	*
	20	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
	21	* CA 95054 USA or visit www.sun.com if you need additional information or
	22	* have any questions.
	23	*
	24	* GPL HEADER END
	25	*/
	26	/*
	27	* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
	28	* Use is subject to license terms.
	29	*
	30	* Copyright (c) 2011, 2012, Intel Corporation.
	31	*/
	32	/*
	33	* This file is part of Lustre, http://www.lustre.org/
	34	* Lustre is a trademark of Sun Microsystems, Inc.
	35	*
	36	* lustre/obdclass/linux/linux-obdo.c
	37	*
	38	* Object Devices Class Driver
	39	* These are the only exported functions, they provide some generic
	40	* infrastructure for managing object devices
	41	*/
	42
	43	#define DEBUG_SUBSYSTEM S_CLASS
	44
	45	#include <linux/module.h>
610f7377 GKH	46	#include "../../include/obd_class.h"
610f7377 GKH	47	#include "../../include/lustre/lustre_idl.h"
d7e09d03 PT	48
	49	#include <linux/fs.h>
	50	#include <linux/pagemap.h> /* for PAGE_CACHE_SIZE */
	51
	52	/FIXME: Just copy from obdo_from_inode/
	53	void obdo_from_la(struct obdo dst, struct lu_attr la, __u64 valid)
	54	{
	55	obd_flag newvalid = 0;
	56
	57	if (valid & LA_ATIME) {
	58	dst->o_atime = la->la_atime;
	59	newvalid \|= OBD_MD_FLATIME;
	60	}
	61	if (valid & LA_MTIME) {
	62	dst->o_mtime = la->la_mtime;
	63	newvalid \|= OBD_MD_FLMTIME;
	64	}
	65	if (valid & LA_CTIME) {
	66	dst->o_ctime = la->la_ctime;
	67	newvalid \|= OBD_MD_FLCTIME;
	68	}
	69	if (valid & LA_SIZE) {
	70	dst->o_size = la->la_size;
	71	newvalid \|= OBD_MD_FLSIZE;
	72	}
	73	if (valid & LA_BLOCKS) { /* allocation of space (x512 bytes) */
	74	dst->o_blocks = la->la_blocks;
	75	newvalid \|= OBD_MD_FLBLOCKS;
	76	}
	77	if (valid & LA_TYPE) {
	78	dst->o_mode = (dst->o_mode & S_IALLUGO) \|
	79	(la->la_mode & S_IFMT);
	80	newvalid \|= OBD_MD_FLTYPE;
	81	}
	82	if (valid & LA_MODE) {
	83	dst->o_mode = (dst->o_mode & S_IFMT) \|
	84	(la->la_mode & S_IALLUGO);
	85	newvalid \|= OBD_MD_FLMODE;
	86	}
	87	if (valid & LA_UID) {
	88	dst->o_uid = la->la_uid;
	89	newvalid \|= OBD_MD_FLUID;
	90	}
	91	if (valid & LA_GID) {
	92	dst->o_gid = la->la_gid;
	93	newvalid \|= OBD_MD_FLGID;
	94	}
	95	dst->o_valid \|= newvalid;
	96	}
	97	EXPORT_SYMBOL(obdo_from_la);
	98
	99	/FIXME: Just copy from obdo_from_inode/
	100	void la_from_obdo(struct lu_attr dst, struct obdo obdo, obd_flag valid)
	101	{
	102	__u64 newvalid = 0;
	103
	104	valid &= obdo->o_valid;
	105
	106	if (valid & OBD_MD_FLATIME) {
	107	dst->la_atime = obdo->o_atime;
	108	newvalid \|= LA_ATIME;
	109	}
	110	if (valid & OBD_MD_FLMTIME) {
	111	dst->la_mtime = obdo->o_mtime;
112	newvalid \|= LA_MTIME;
113	}
114	if (valid & OBD_MD_FLCTIME) {
115	dst->la_ctime = obdo->o_ctime;
116	newvalid \|= LA_CTIME;
117	}
118	if (valid & OBD_MD_FLSIZE) {
119	dst->la_size = obdo->o_size;
120	newvalid \|= LA_SIZE;
121	}
122	if (valid & OBD_MD_FLBLOCKS) {
123	dst->la_blocks = obdo->o_blocks;
124	newvalid \|= LA_BLOCKS;
125	}
126	if (valid & OBD_MD_FLTYPE) {
127	dst->la_mode = (dst->la_mode & S_IALLUGO) \|
128	(obdo->o_mode & S_IFMT);
129	newvalid \|= LA_TYPE;
130	}
131	if (valid & OBD_MD_FLMODE) {
132	dst->la_mode = (dst->la_mode & S_IFMT) \|
133	(obdo->o_mode & S_IALLUGO);
134	newvalid \|= LA_MODE;
135	}
136	if (valid & OBD_MD_FLUID) {
137	dst->la_uid = obdo->o_uid;
138	newvalid \|= LA_UID;
139	}
140	if (valid & OBD_MD_FLGID) {
141	dst->la_gid = obdo->o_gid;
142	newvalid \|= LA_GID;
143	}
144	dst->la_valid = newvalid;
145	}
146	EXPORT_SYMBOL(la_from_obdo);
147
148	void obdo_refresh_inode(struct inode dst, struct obdo src, obd_flag valid)
149	{
150	valid &= src->o_valid;
151
152	if (valid & (OBD_MD_FLCTIME \| OBD_MD_FLMTIME))
153	CDEBUG(D_INODE,
55f5a824	154	"valid %#llx, cur time %lu/%lu, new %llu/%llu\n",
d7e09d03 PT	155	src->o_valid, LTIME_S(dst->i_mtime),
	156	LTIME_S(dst->i_ctime), src->o_mtime, src->o_ctime);
	157
	158	if (valid & OBD_MD_FLATIME && src->o_atime > LTIME_S(dst->i_atime))
	159	LTIME_S(dst->i_atime) = src->o_atime;
	160	if (valid & OBD_MD_FLMTIME && src->o_mtime > LTIME_S(dst->i_mtime))
	161	LTIME_S(dst->i_mtime) = src->o_mtime;
	162	if (valid & OBD_MD_FLCTIME && src->o_ctime > LTIME_S(dst->i_ctime))
	163	LTIME_S(dst->i_ctime) = src->o_ctime;
	164	if (valid & OBD_MD_FLSIZE)
	165	i_size_write(dst, src->o_size);
	166	/* optimum IO size */
	167	if (valid & OBD_MD_FLBLKSZ && src->o_blksize > (1 << dst->i_blkbits))
	168	dst->i_blkbits = ffs(src->o_blksize) - 1;
	169
	170	if (dst->i_blkbits < PAGE_CACHE_SHIFT)
	171	dst->i_blkbits = PAGE_CACHE_SHIFT;
	172
	173	/* allocation of space */
	174	if (valid & OBD_MD_FLBLOCKS && src->o_blocks > dst->i_blocks)
	175	/*
	176	* XXX shouldn't overflow be checked here like in
	177	* obdo_to_inode().
	178	*/
	179	dst->i_blocks = src->o_blocks;
	180	}
	181	EXPORT_SYMBOL(obdo_refresh_inode);
	182
	183	void obdo_to_inode(struct inode dst, struct obdo src, obd_flag valid)
	184	{
	185	valid &= src->o_valid;
	186
	187	LASSERTF(!(valid & (OBD_MD_FLTYPE \| OBD_MD_FLGENER \| OBD_MD_FLFID \|
	188	OBD_MD_FLID \| OBD_MD_FLGROUP)),
	189	"object "DOSTID", valid %x\n", POSTID(&src->o_oi), valid);
	190
	191	if (valid & (OBD_MD_FLCTIME \| OBD_MD_FLMTIME))
	192	CDEBUG(D_INODE,
55f5a824	193	"valid %#llx, cur time %lu/%lu, new %llu/%llu\n",
d7e09d03 PT	194	src->o_valid, LTIME_S(dst->i_mtime),
	195	LTIME_S(dst->i_ctime), src->o_mtime, src->o_ctime);
	196
	197	if (valid & OBD_MD_FLATIME)
	198	LTIME_S(dst->i_atime) = src->o_atime;
	199	if (valid & OBD_MD_FLMTIME)
	200	LTIME_S(dst->i_mtime) = src->o_mtime;
	201	if (valid & OBD_MD_FLCTIME && src->o_ctime > LTIME_S(dst->i_ctime))
	202	LTIME_S(dst->i_ctime) = src->o_ctime;
	203	if (valid & OBD_MD_FLSIZE)
	204	i_size_write(dst, src->o_size);
	205	if (valid & OBD_MD_FLBLOCKS) { /* allocation of space */
	206	dst->i_blocks = src->o_blocks;
	207	if (dst->i_blocks < src->o_blocks) /* overflow */
	208	dst->i_blocks = -1;
	209
	210	}
	211	if (valid & OBD_MD_FLBLKSZ)
	212	dst->i_blkbits = ffs(src->o_blksize)-1;
	213	if (valid & OBD_MD_FLMODE)
	214	dst->i_mode = (dst->i_mode & S_IFMT) \| (src->o_mode & ~S_IFMT);
	215	if (valid & OBD_MD_FLUID)
4b1a25f0	216	dst->i_uid = make_kuid(&init_user_ns, src->o_uid);
d7e09d03	217	if (valid & OBD_MD_FLGID)
4b1a25f0	218	dst->i_gid = make_kgid(&init_user_ns, src->o_gid);
d7e09d03 PT	219	if (valid & OBD_MD_FLFLAGS)
	220	dst->i_flags = src->o_flags;
	221	}
	222	EXPORT_SYMBOL(obdo_to_inode);