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
44 #include "../../include/linux/libcfs/libcfs.h"
45
46 #include "../include/obd.h"
47 #include "../include/lustre_lite.h"
48
49 #include "vvp_internal.h"
50
51 /*****************************************************************************
52 *
53 * Object operations.
54 *
55 */
56
vvp_object_print(const struct lu_env * env,void * cookie,lu_printer_t p,const struct lu_object * o)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
vvp_attr_get(const struct lu_env * env,struct cl_object * obj,struct cl_attr * attr)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;
94 attr->cat_uid = from_kuid(&init_user_ns, inode->i_uid);
95 attr->cat_gid = from_kgid(&init_user_ns, inode->i_gid);
96 /* KMS is not known by this layer */
97 return 0; /* layers below have to fill in the rest */
98 }
99
vvp_attr_set(const struct lu_env * env,struct cl_object * obj,const struct cl_attr * attr,unsigned valid)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)
106 inode->i_uid = make_kuid(&init_user_ns, attr->cat_uid);
107 if (valid & CAT_GID)
108 inode->i_gid = make_kgid(&init_user_ns, attr->cat_gid);
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
vvp_conf_set(const struct lu_env * env,struct cl_object * obj,const struct cl_object_conf * conf)123 static int vvp_conf_set(const struct lu_env *env, struct cl_object *obj,
124 const struct cl_object_conf *conf)
125 {
126 struct ll_inode_info *lli = ll_i2info(conf->coc_inode);
127
128 if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
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
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) {
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);
155
156 lli->lli_has_smd = lsm_has_objects(conf->u.coc_md->lsm);
157 ll_layout_version_set(lli, conf->u.coc_md->lsm->lsm_layout_gen);
158 } else {
159 CDEBUG(D_VFSTRACE, DFID ": layout nuked: %u.\n",
160 PFID(&lli->lli_fid), lli->lli_layout_gen);
161
162 lli->lli_has_smd = false;
163 ll_layout_version_set(lli, LL_LAYOUT_GEN_EMPTY);
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
cl_inode2ccc(struct inode * inode)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
vvp_object_alloc(const struct lu_env * env,const struct lu_object_header * hdr,struct lu_device * dev)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 }
202