[deliverable/linux.git] / drivers / staging / lustre / lustre / llite / vvp_object.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) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
 * Use is subject to license terms.
 *
 * Copyright (c) 2012, Intel Corporation.
 */
/*
 * This file is part of Lustre, http://www.lustre.org/
 * Lustre is a trademark of Sun Microsystems, Inc.
 *
 * cl_object implementation for VVP layer.
 *
 *   Author: Nikita Danilov <nikita.danilov@sun.com>
 */

#define DEBUG_SUBSYSTEM S_LLITE


#include "../../include/linux/libcfs/libcfs.h"

#include <obd.h>
#include <lustre_lite.h>

#include "vvp_internal.h"

/*****************************************************************************
 *
 * Object operations.
 *
 */

static int vvp_object_print(const struct lu_env *env, void *cookie,
			    lu_printer_t p, const struct lu_object *o)
{
	struct ccc_object    *obj   = lu2ccc(o);
	struct inode	 *inode = obj->cob_inode;
	struct ll_inode_info *lli;

	(*p)(env, cookie, "(%s %d %d) inode: %p ",
	     list_empty(&obj->cob_pending_list) ? "-" : "+",
	     obj->cob_transient_pages, atomic_read(&obj->cob_mmap_cnt),
	     inode);
	if (inode) {
		lli = ll_i2info(inode);
		(*p)(env, cookie, "%lu/%u %o %u %d %p "DFID,
		     inode->i_ino, inode->i_generation, inode->i_mode,
		     inode->i_nlink, atomic_read(&inode->i_count),
		     lli->lli_clob, PFID(&lli->lli_fid));
	}
	return 0;
}

static int vvp_attr_get(const struct lu_env *env, struct cl_object *obj,
			struct cl_attr *attr)
{
	struct inode *inode = ccc_object_inode(obj);

	/*
	 * lov overwrites most of these fields in
	 * lov_attr_get()->...lov_merge_lvb_kms(), except when inode
	 * attributes are newer.
	 */

	attr->cat_size = i_size_read(inode);
	attr->cat_mtime = LTIME_S(inode->i_mtime);
	attr->cat_atime = LTIME_S(inode->i_atime);
	attr->cat_ctime = LTIME_S(inode->i_ctime);
	attr->cat_blocks = inode->i_blocks;
	attr->cat_uid = from_kuid(&init_user_ns, inode->i_uid);
	attr->cat_gid = from_kgid(&init_user_ns, inode->i_gid);
	/* KMS is not known by this layer */
	return 0; /* layers below have to fill in the rest */
}

static int vvp_attr_set(const struct lu_env *env, struct cl_object *obj,
			const struct cl_attr *attr, unsigned valid)
{
	struct inode *inode = ccc_object_inode(obj);

	if (valid & CAT_UID)
		inode->i_uid = make_kuid(&init_user_ns, attr->cat_uid);
	if (valid & CAT_GID)
		inode->i_gid = make_kgid(&init_user_ns, attr->cat_gid);
	if (valid & CAT_ATIME)
		LTIME_S(inode->i_atime) = attr->cat_atime;
	if (valid & CAT_MTIME)
		LTIME_S(inode->i_mtime) = attr->cat_mtime;
	if (valid & CAT_CTIME)
		LTIME_S(inode->i_ctime) = attr->cat_ctime;
	if (0 && valid & CAT_SIZE)
		cl_isize_write_nolock(inode, attr->cat_size);
	/* not currently necessary */
	if (0 && valid & (CAT_UID|CAT_GID|CAT_SIZE))
		mark_inode_dirty(inode);
	return 0;
}

static int vvp_conf_set(const struct lu_env *env, struct cl_object *obj,
			const struct cl_object_conf *conf)
{
	struct ll_inode_info *lli = ll_i2info(conf->coc_inode);

	if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
		CDEBUG(D_VFSTRACE, DFID ": losing layout lock\n",
		       PFID(&lli->lli_fid));

		ll_layout_version_set(lli, LL_LAYOUT_GEN_NONE);

		/* Clean up page mmap for this inode.
		 * The reason for us to do this is that if the page has
		 * already been installed into memory space, the process
		 * can access it without interacting with lustre, so this
		 * page may be stale due to layout change, and the process
		 * will never be notified.
		 * This operation is expensive but mmap processes have to pay
		 * a price themselves. */
		unmap_mapping_range(conf->coc_inode->i_mapping,
				    0, OBD_OBJECT_EOF, 0);

		return 0;
	}

	if (conf->coc_opc != OBJECT_CONF_SET)
		return 0;

	if (conf->u.coc_md != NULL && conf->u.coc_md->lsm != NULL) {
		CDEBUG(D_VFSTRACE, DFID ": layout version change: %u -> %u\n",
		       PFID(&lli->lli_fid), lli->lli_layout_gen,
		       conf->u.coc_md->lsm->lsm_layout_gen);

		lli->lli_has_smd = lsm_has_objects(conf->u.coc_md->lsm);
		ll_layout_version_set(lli, conf->u.coc_md->lsm->lsm_layout_gen);
	} else {
		CDEBUG(D_VFSTRACE, DFID ": layout nuked: %u.\n",
		       PFID(&lli->lli_fid), lli->lli_layout_gen);

		lli->lli_has_smd = false;
		ll_layout_version_set(lli, LL_LAYOUT_GEN_EMPTY);
	}
	return 0;
}

static const struct cl_object_operations vvp_ops = {
	.coo_page_init = vvp_page_init,
	.coo_lock_init = vvp_lock_init,
	.coo_io_init   = vvp_io_init,
	.coo_attr_get  = vvp_attr_get,
	.coo_attr_set  = vvp_attr_set,
	.coo_conf_set  = vvp_conf_set,
	.coo_glimpse   = ccc_object_glimpse
};

static const struct lu_object_operations vvp_lu_obj_ops = {
	.loo_object_init  = ccc_object_init,
	.loo_object_free  = ccc_object_free,
	.loo_object_print = vvp_object_print
};

struct ccc_object *cl_inode2ccc(struct inode *inode)
{
	struct cl_inode_info *lli = cl_i2info(inode);
	struct cl_object     *obj = lli->lli_clob;
	struct lu_object     *lu;

	LASSERT(obj != NULL);
	lu = lu_object_locate(obj->co_lu.lo_header, &vvp_device_type);
	LASSERT(lu != NULL);
	return lu2ccc(lu);
}

struct lu_object *vvp_object_alloc(const struct lu_env *env,
				   const struct lu_object_header *hdr,
				   struct lu_device *dev)
{
	return ccc_object_alloc(env, hdr, dev, &vvp_ops, &vvp_lu_obj_ops);
}
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) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
	28	* Use is subject to license terms.
	29	*
	30	* Copyright (c) 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	* cl_object implementation for VVP layer.
	37	*
	38	* Author: Nikita Danilov <nikita.danilov@sun.com>
	39	*/
	40
	41	#define DEBUG_SUBSYSTEM S_LLITE
	42
	43
9fdaf8c0	44	#include "../../include/linux/libcfs/libcfs.h"
d7e09d03 PT	45
	46	#include <obd.h>
	47	#include <lustre_lite.h>
	48
	49	#include "vvp_internal.h"
	50
	51	/*****************************************************************************
	52	*
	53	* Object operations.
	54	*
	55	*/
	56
	57	static int vvp_object_print(const struct lu_env env, void cookie,
	58	lu_printer_t p, const struct lu_object *o)
	59	{
	60	struct ccc_object *obj = lu2ccc(o);
	61	struct inode *inode = obj->cob_inode;
	62	struct ll_inode_info *lli;
	63
	64	(*p)(env, cookie, "(%s %d %d) inode: %p ",
	65	list_empty(&obj->cob_pending_list) ? "-" : "+",
	66	obj->cob_transient_pages, atomic_read(&obj->cob_mmap_cnt),
	67	inode);
	68	if (inode) {
	69	lli = ll_i2info(inode);
	70	(*p)(env, cookie, "%lu/%u %o %u %d %p "DFID,
	71	inode->i_ino, inode->i_generation, inode->i_mode,
	72	inode->i_nlink, atomic_read(&inode->i_count),
	73	lli->lli_clob, PFID(&lli->lli_fid));
	74	}
	75	return 0;
	76	}
	77
	78	static int vvp_attr_get(const struct lu_env env, struct cl_object obj,
	79	struct cl_attr *attr)
	80	{
	81	struct inode *inode = ccc_object_inode(obj);
	82
	83	/*
	84	* lov overwrites most of these fields in
	85	* lov_attr_get()->...lov_merge_lvb_kms(), except when inode
	86	* attributes are newer.
	87	*/
	88
	89	attr->cat_size = i_size_read(inode);
	90	attr->cat_mtime = LTIME_S(inode->i_mtime);
	91	attr->cat_atime = LTIME_S(inode->i_atime);
	92	attr->cat_ctime = LTIME_S(inode->i_ctime);
	93	attr->cat_blocks = inode->i_blocks;
4b1a25f0 PT	94	attr->cat_uid = from_kuid(&init_user_ns, inode->i_uid);
4b1a25f0 PT	95	attr->cat_gid = from_kgid(&init_user_ns, inode->i_gid);
d7e09d03 PT	96	/* KMS is not known by this layer */
	97	return 0; /* layers below have to fill in the rest */
	98	}
	99
	100	static int vvp_attr_set(const struct lu_env env, struct cl_object obj,
	101	const struct cl_attr *attr, unsigned valid)
	102	{
	103	struct inode *inode = ccc_object_inode(obj);
	104
	105	if (valid & CAT_UID)
4b1a25f0	106	inode->i_uid = make_kuid(&init_user_ns, attr->cat_uid);
d7e09d03	107	if (valid & CAT_GID)
4b1a25f0	108	inode->i_gid = make_kgid(&init_user_ns, attr->cat_gid);
d7e09d03 PT	109	if (valid & CAT_ATIME)
	110	LTIME_S(inode->i_atime) = attr->cat_atime;
	111	if (valid & CAT_MTIME)
	112	LTIME_S(inode->i_mtime) = attr->cat_mtime;
	113	if (valid & CAT_CTIME)
	114	LTIME_S(inode->i_ctime) = attr->cat_ctime;
	115	if (0 && valid & CAT_SIZE)
	116	cl_isize_write_nolock(inode, attr->cat_size);
	117	/* not currently necessary */
	118	if (0 && valid & (CAT_UID\|CAT_GID\|CAT_SIZE))
	119	mark_inode_dirty(inode);
	120	return 0;
	121	}
	122
2d95f10e JH	123	static int vvp_conf_set(const struct lu_env env, struct cl_object obj,
2d95f10e JH	124	const struct cl_object_conf *conf)
d7e09d03 PT	125	{
	126	struct ll_inode_info *lli = ll_i2info(conf->coc_inode);
	127
	128	if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
09aed8a5 JX	129	CDEBUG(D_VFSTRACE, DFID ": losing layout lock\n",
	130	PFID(&lli->lli_fid));
	131
	132	ll_layout_version_set(lli, LL_LAYOUT_GEN_NONE);
	133
	134	/* Clean up page mmap for this inode.
	135	* The reason for us to do this is that if the page has
	136	* already been installed into memory space, the process
	137	* can access it without interacting with lustre, so this
	138	* page may be stale due to layout change, and the process
	139	* will never be notified.
	140	* This operation is expensive but mmap processes have to pay
	141	* a price themselves. */
	142	unmap_mapping_range(conf->coc_inode->i_mapping,
	143	0, OBD_OBJECT_EOF, 0);
	144
d7e09d03 PT	145	return 0;
	146	}
	147
	148	if (conf->coc_opc != OBJECT_CONF_SET)
	149	return 0;
	150
	151	if (conf->u.coc_md != NULL && conf->u.coc_md->lsm != NULL) {
09aed8a5 JX	152	CDEBUG(D_VFSTRACE, DFID ": layout version change: %u -> %u\n",
	153	PFID(&lli->lli_fid), lli->lli_layout_gen,
	154	conf->u.coc_md->lsm->lsm_layout_gen);
d7e09d03	155
48d23e61	156	lli->lli_has_smd = lsm_has_objects(conf->u.coc_md->lsm);
09aed8a5	157	ll_layout_version_set(lli, conf->u.coc_md->lsm->lsm_layout_gen);
d7e09d03	158	} else {
09aed8a5 JX	159	CDEBUG(D_VFSTRACE, DFID ": layout nuked: %u.\n",
09aed8a5 JX	160	PFID(&lli->lli_fid), lli->lli_layout_gen);
d7e09d03 PT	161
d7e09d03 PT	162	lli->lli_has_smd = false;
09aed8a5	163	ll_layout_version_set(lli, LL_LAYOUT_GEN_EMPTY);
d7e09d03 PT	164	}
	165	return 0;
	166	}
	167
	168	static const struct cl_object_operations vvp_ops = {
	169	.coo_page_init = vvp_page_init,
	170	.coo_lock_init = vvp_lock_init,
	171	.coo_io_init = vvp_io_init,
	172	.coo_attr_get = vvp_attr_get,
	173	.coo_attr_set = vvp_attr_set,
	174	.coo_conf_set = vvp_conf_set,
	175	.coo_glimpse = ccc_object_glimpse
	176	};
	177
	178	static const struct lu_object_operations vvp_lu_obj_ops = {
	179	.loo_object_init = ccc_object_init,
	180	.loo_object_free = ccc_object_free,
	181	.loo_object_print = vvp_object_print
	182	};
	183
	184	struct ccc_object cl_inode2ccc(struct inode inode)
	185	{
	186	struct cl_inode_info *lli = cl_i2info(inode);
	187	struct cl_object *obj = lli->lli_clob;
	188	struct lu_object *lu;
	189
	190	LASSERT(obj != NULL);
	191	lu = lu_object_locate(obj->co_lu.lo_header, &vvp_device_type);
	192	LASSERT(lu != NULL);
	193	return lu2ccc(lu);
	194	}
	195
	196	struct lu_object vvp_object_alloc(const struct lu_env env,
	197	const struct lu_object_header *hdr,
	198	struct lu_device *dev)
	199	{
	200	return ccc_object_alloc(env, hdr, dev, &vvp_ops, &vvp_lu_obj_ops);
	201	}