--- /dev/null
+/*
+ * 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);
+}
Code Review / kvmfornfv.git / blobdiff