201 lines
6.1 KiB
C
201 lines
6.1 KiB
C
/*
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* GPL HEADER START
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 only,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License version 2 for more details (a copy is included
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* in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU General Public License
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* version 2 along with this program; If not, see
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* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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* GPL HEADER END
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*/
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/*
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* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
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* Use is subject to license terms.
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*
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* Copyright (c) 2012, 2015, Intel Corporation.
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*/
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/*
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* This file is part of Lustre, http://www.lustre.org/
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* Lustre is a trademark of Sun Microsystems, Inc.
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*
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* cl_object implementation for VVP layer.
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*
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* Author: Nikita Danilov <nikita.danilov@sun.com>
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*/
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#define DEBUG_SUBSYSTEM S_LLITE
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#include "../../include/linux/libcfs/libcfs.h"
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#include "../include/obd.h"
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#include "../include/lustre_lite.h"
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#include "vvp_internal.h"
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/*****************************************************************************
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*
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* Object operations.
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*
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*/
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static int vvp_object_print(const struct lu_env *env, void *cookie,
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lu_printer_t p, const struct lu_object *o)
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{
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struct ccc_object *obj = lu2ccc(o);
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struct inode *inode = obj->cob_inode;
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struct ll_inode_info *lli;
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(*p)(env, cookie, "(%s %d %d) inode: %p ",
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list_empty(&obj->cob_pending_list) ? "-" : "+",
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obj->cob_transient_pages, atomic_read(&obj->cob_mmap_cnt),
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inode);
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if (inode) {
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lli = ll_i2info(inode);
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(*p)(env, cookie, "%lu/%u %o %u %d %p "DFID,
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inode->i_ino, inode->i_generation, inode->i_mode,
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inode->i_nlink, atomic_read(&inode->i_count),
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lli->lli_clob, PFID(&lli->lli_fid));
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}
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return 0;
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}
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static int vvp_attr_get(const struct lu_env *env, struct cl_object *obj,
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struct cl_attr *attr)
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{
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struct inode *inode = ccc_object_inode(obj);
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/*
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* lov overwrites most of these fields in
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* lov_attr_get()->...lov_merge_lvb_kms(), except when inode
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* attributes are newer.
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*/
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attr->cat_size = i_size_read(inode);
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attr->cat_mtime = inode->i_mtime.tv_sec;
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attr->cat_atime = inode->i_atime.tv_sec;
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attr->cat_ctime = inode->i_ctime.tv_sec;
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attr->cat_blocks = inode->i_blocks;
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attr->cat_uid = from_kuid(&init_user_ns, inode->i_uid);
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attr->cat_gid = from_kgid(&init_user_ns, inode->i_gid);
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/* KMS is not known by this layer */
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return 0; /* layers below have to fill in the rest */
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}
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static int vvp_attr_set(const struct lu_env *env, struct cl_object *obj,
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const struct cl_attr *attr, unsigned valid)
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{
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struct inode *inode = ccc_object_inode(obj);
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if (valid & CAT_UID)
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inode->i_uid = make_kuid(&init_user_ns, attr->cat_uid);
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if (valid & CAT_GID)
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inode->i_gid = make_kgid(&init_user_ns, attr->cat_gid);
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if (valid & CAT_ATIME)
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inode->i_atime.tv_sec = attr->cat_atime;
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if (valid & CAT_MTIME)
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inode->i_mtime.tv_sec = attr->cat_mtime;
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if (valid & CAT_CTIME)
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inode->i_ctime.tv_sec = attr->cat_ctime;
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if (0 && valid & CAT_SIZE)
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cl_isize_write_nolock(inode, attr->cat_size);
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/* not currently necessary */
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if (0 && valid & (CAT_UID|CAT_GID|CAT_SIZE))
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mark_inode_dirty(inode);
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return 0;
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}
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static int vvp_conf_set(const struct lu_env *env, struct cl_object *obj,
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const struct cl_object_conf *conf)
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{
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struct ll_inode_info *lli = ll_i2info(conf->coc_inode);
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if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
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CDEBUG(D_VFSTRACE, DFID ": losing layout lock\n",
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PFID(&lli->lli_fid));
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ll_layout_version_set(lli, LL_LAYOUT_GEN_NONE);
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/* Clean up page mmap for this inode.
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* The reason for us to do this is that if the page has
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* already been installed into memory space, the process
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* can access it without interacting with lustre, so this
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* page may be stale due to layout change, and the process
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* will never be notified.
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* This operation is expensive but mmap processes have to pay
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* a price themselves. */
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unmap_mapping_range(conf->coc_inode->i_mapping,
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0, OBD_OBJECT_EOF, 0);
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return 0;
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}
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if (conf->coc_opc != OBJECT_CONF_SET)
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return 0;
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if (conf->u.coc_md != NULL && conf->u.coc_md->lsm != NULL) {
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CDEBUG(D_VFSTRACE, DFID ": layout version change: %u -> %u\n",
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PFID(&lli->lli_fid), lli->lli_layout_gen,
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conf->u.coc_md->lsm->lsm_layout_gen);
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lli->lli_has_smd = lsm_has_objects(conf->u.coc_md->lsm);
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ll_layout_version_set(lli, conf->u.coc_md->lsm->lsm_layout_gen);
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} else {
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CDEBUG(D_VFSTRACE, DFID ": layout nuked: %u.\n",
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PFID(&lli->lli_fid), lli->lli_layout_gen);
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lli->lli_has_smd = false;
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ll_layout_version_set(lli, LL_LAYOUT_GEN_EMPTY);
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}
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return 0;
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}
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static const struct cl_object_operations vvp_ops = {
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.coo_page_init = vvp_page_init,
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.coo_lock_init = vvp_lock_init,
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.coo_io_init = vvp_io_init,
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.coo_attr_get = vvp_attr_get,
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.coo_attr_set = vvp_attr_set,
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.coo_conf_set = vvp_conf_set,
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.coo_glimpse = ccc_object_glimpse
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};
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static const struct lu_object_operations vvp_lu_obj_ops = {
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.loo_object_init = ccc_object_init,
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.loo_object_free = ccc_object_free,
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.loo_object_print = vvp_object_print
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};
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struct ccc_object *cl_inode2ccc(struct inode *inode)
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{
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struct cl_inode_info *lli = cl_i2info(inode);
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struct cl_object *obj = lli->lli_clob;
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struct lu_object *lu;
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LASSERT(obj != NULL);
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lu = lu_object_locate(obj->co_lu.lo_header, &vvp_device_type);
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LASSERT(lu != NULL);
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return lu2ccc(lu);
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}
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struct lu_object *vvp_object_alloc(const struct lu_env *env,
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const struct lu_object_header *hdr,
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struct lu_device *dev)
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{
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return ccc_object_alloc(env, hdr, dev, &vvp_ops, &vvp_lu_obj_ops);
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}
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