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/*
* 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 "../include/obd.h"
#include "../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);
}
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