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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.
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).
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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2015, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * cl_object implementation for VVP layer.
34 * Author: Nikita Danilov <nikita.danilov@sun.com>
37 #define DEBUG_SUBSYSTEM S_LLITE
39 #include "../../include/linux/libcfs/libcfs.h"
41 #include "../include/obd.h"
43 #include "llite_internal.h"
44 #include "vvp_internal.h"
46 /*****************************************************************************
52 int vvp_object_invariant(const struct cl_object *obj)
54 struct inode *inode = vvp_object_inode(obj);
55 struct ll_inode_info *lli = ll_i2info(inode);
57 return (S_ISREG(inode->i_mode) || inode->i_mode == 0) &&
61 static int vvp_object_print(const struct lu_env *env, void *cookie,
62 lu_printer_t p, const struct lu_object *o)
64 struct vvp_object *obj = lu2vvp(o);
65 struct inode *inode = obj->vob_inode;
66 struct ll_inode_info *lli;
68 (*p)(env, cookie, "(%s %d %d) inode: %p ",
69 list_empty(&obj->vob_pending_list) ? "-" : "+",
70 atomic_read(&obj->vob_transient_pages),
71 atomic_read(&obj->vob_mmap_cnt), inode);
73 lli = ll_i2info(inode);
74 (*p)(env, cookie, "%lu/%u %o %u %d %p "DFID,
75 inode->i_ino, inode->i_generation, inode->i_mode,
76 inode->i_nlink, atomic_read(&inode->i_count),
77 lli->lli_clob, PFID(&lli->lli_fid));
82 static int vvp_attr_get(const struct lu_env *env, struct cl_object *obj,
85 struct inode *inode = vvp_object_inode(obj);
88 * lov overwrites most of these fields in
89 * lov_attr_get()->...lov_merge_lvb_kms(), except when inode
90 * attributes are newer.
93 attr->cat_size = i_size_read(inode);
94 attr->cat_mtime = inode->i_mtime.tv_sec;
95 attr->cat_atime = inode->i_atime.tv_sec;
96 attr->cat_ctime = inode->i_ctime.tv_sec;
97 attr->cat_blocks = inode->i_blocks;
98 attr->cat_uid = from_kuid(&init_user_ns, inode->i_uid);
99 attr->cat_gid = from_kgid(&init_user_ns, inode->i_gid);
100 /* KMS is not known by this layer */
101 return 0; /* layers below have to fill in the rest */
104 static int vvp_attr_update(const struct lu_env *env, struct cl_object *obj,
105 const struct cl_attr *attr, unsigned int valid)
107 struct inode *inode = vvp_object_inode(obj);
110 inode->i_uid = make_kuid(&init_user_ns, attr->cat_uid);
112 inode->i_gid = make_kgid(&init_user_ns, attr->cat_gid);
113 if (valid & CAT_ATIME)
114 inode->i_atime.tv_sec = attr->cat_atime;
115 if (valid & CAT_MTIME)
116 inode->i_mtime.tv_sec = attr->cat_mtime;
117 if (valid & CAT_CTIME)
118 inode->i_ctime.tv_sec = attr->cat_ctime;
119 if (0 && valid & CAT_SIZE)
120 i_size_write(inode, attr->cat_size);
121 /* not currently necessary */
122 if (0 && valid & (CAT_UID | CAT_GID | CAT_SIZE))
123 mark_inode_dirty(inode);
127 static int vvp_conf_set(const struct lu_env *env, struct cl_object *obj,
128 const struct cl_object_conf *conf)
130 struct ll_inode_info *lli = ll_i2info(conf->coc_inode);
132 if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
133 CDEBUG(D_VFSTRACE, DFID ": losing layout lock\n",
134 PFID(&lli->lli_fid));
136 ll_layout_version_set(lli, LL_LAYOUT_GEN_NONE);
138 /* Clean up page mmap for this inode.
139 * The reason for us to do this is that if the page has
140 * already been installed into memory space, the process
141 * can access it without interacting with lustre, so this
142 * page may be stale due to layout change, and the process
143 * will never be notified.
144 * This operation is expensive but mmap processes have to pay
145 * a price themselves.
147 unmap_mapping_range(conf->coc_inode->i_mapping,
148 0, OBD_OBJECT_EOF, 0);
153 if (conf->coc_opc != OBJECT_CONF_SET)
156 if (conf->u.coc_md && conf->u.coc_md->lsm) {
157 CDEBUG(D_VFSTRACE, DFID ": layout version change: %u -> %u\n",
158 PFID(&lli->lli_fid), lli->lli_layout_gen,
159 conf->u.coc_md->lsm->lsm_layout_gen);
161 lli->lli_has_smd = lsm_has_objects(conf->u.coc_md->lsm);
162 ll_layout_version_set(lli, conf->u.coc_md->lsm->lsm_layout_gen);
164 CDEBUG(D_VFSTRACE, DFID ": layout nuked: %u.\n",
165 PFID(&lli->lli_fid), lli->lli_layout_gen);
167 lli->lli_has_smd = false;
168 ll_layout_version_set(lli, LL_LAYOUT_GEN_EMPTY);
173 static int vvp_prune(const struct lu_env *env, struct cl_object *obj)
175 struct inode *inode = vvp_object_inode(obj);
178 rc = cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_LOCAL, 1);
180 CDEBUG(D_VFSTRACE, DFID ": writeback failed: %d\n",
181 PFID(lu_object_fid(&obj->co_lu)), rc);
185 truncate_inode_pages(inode->i_mapping, 0);
189 static int vvp_object_glimpse(const struct lu_env *env,
190 const struct cl_object *obj, struct ost_lvb *lvb)
192 struct inode *inode = vvp_object_inode(obj);
194 lvb->lvb_mtime = LTIME_S(inode->i_mtime);
195 lvb->lvb_atime = LTIME_S(inode->i_atime);
196 lvb->lvb_ctime = LTIME_S(inode->i_ctime);
198 * LU-417: Add dirty pages block count lest i_blocks reports 0, some
199 * "cp" or "tar" on remote node may think it's a completely sparse file
202 if (lvb->lvb_size > 0 && lvb->lvb_blocks == 0)
203 lvb->lvb_blocks = dirty_cnt(inode);
207 static const struct cl_object_operations vvp_ops = {
208 .coo_page_init = vvp_page_init,
209 .coo_lock_init = vvp_lock_init,
210 .coo_io_init = vvp_io_init,
211 .coo_attr_get = vvp_attr_get,
212 .coo_attr_update = vvp_attr_update,
213 .coo_conf_set = vvp_conf_set,
214 .coo_prune = vvp_prune,
215 .coo_glimpse = vvp_object_glimpse
218 static int vvp_object_init0(const struct lu_env *env,
219 struct vvp_object *vob,
220 const struct cl_object_conf *conf)
222 vob->vob_inode = conf->coc_inode;
223 atomic_set(&vob->vob_transient_pages, 0);
224 cl_object_page_init(&vob->vob_cl, sizeof(struct vvp_page));
228 static int vvp_object_init(const struct lu_env *env, struct lu_object *obj,
229 const struct lu_object_conf *conf)
231 struct vvp_device *dev = lu2vvp_dev(obj->lo_dev);
232 struct vvp_object *vob = lu2vvp(obj);
233 struct lu_object *below;
234 struct lu_device *under;
237 under = &dev->vdv_next->cd_lu_dev;
238 below = under->ld_ops->ldo_object_alloc(env, obj->lo_header, under);
240 const struct cl_object_conf *cconf;
242 cconf = lu2cl_conf(conf);
243 INIT_LIST_HEAD(&vob->vob_pending_list);
244 lu_object_add(obj, below);
245 result = vvp_object_init0(env, vob, cconf);
253 static void vvp_object_free(const struct lu_env *env, struct lu_object *obj)
255 struct vvp_object *vob = lu2vvp(obj);
258 lu_object_header_fini(obj->lo_header);
259 kmem_cache_free(vvp_object_kmem, vob);
262 static const struct lu_object_operations vvp_lu_obj_ops = {
263 .loo_object_init = vvp_object_init,
264 .loo_object_free = vvp_object_free,
265 .loo_object_print = vvp_object_print,
268 struct vvp_object *cl_inode2vvp(struct inode *inode)
270 struct ll_inode_info *lli = ll_i2info(inode);
271 struct cl_object *obj = lli->lli_clob;
272 struct lu_object *lu;
274 lu = lu_object_locate(obj->co_lu.lo_header, &vvp_device_type);
279 struct lu_object *vvp_object_alloc(const struct lu_env *env,
280 const struct lu_object_header *unused,
281 struct lu_device *dev)
283 struct vvp_object *vob;
284 struct lu_object *obj;
286 vob = kmem_cache_zalloc(vvp_object_kmem, GFP_NOFS);
288 struct cl_object_header *hdr;
290 obj = &vob->vob_cl.co_lu;
291 hdr = &vob->vob_header;
292 cl_object_header_init(hdr);
293 hdr->coh_page_bufsize = cfs_size_round(sizeof(struct cl_page));
295 lu_object_init(obj, &hdr->coh_lu, dev);
296 lu_object_add_top(&hdr->coh_lu, obj);
298 vob->vob_cl.co_ops = &vvp_ops;
299 obj->lo_ops = &vvp_lu_obj_ops;