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27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
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30 * Copyright (c) 2012, 2014, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * cl_object implementation for VVP layer.
38 * Author: Nikita Danilov <nikita.danilov@sun.com>
41 #define DEBUG_SUBSYSTEM S_LLITE
44 #include <libcfs/libcfs.h>
47 #include "llite_internal.h"
48 #include "vvp_internal.h"
50 /*****************************************************************************
56 int vvp_object_invariant(const struct cl_object *obj)
58 struct inode *inode = vvp_object_inode(obj);
59 struct ll_inode_info *lli = ll_i2info(inode);
61 return (S_ISREG(inode->i_mode) || inode->i_mode == 0) &&
65 static int vvp_object_print(const struct lu_env *env, void *cookie,
66 lu_printer_t p, const struct lu_object *o)
68 struct vvp_object *obj = lu2vvp(o);
69 struct inode *inode = obj->vob_inode;
70 struct ll_inode_info *lli;
72 (*p)(env, cookie, "(%d %d) inode: %p ",
73 atomic_read(&obj->vob_transient_pages),
74 atomic_read(&obj->vob_mmap_cnt),
77 lli = ll_i2info(inode);
78 (*p)(env, cookie, "%lu/%u %o %u %d %p "DFID,
79 inode->i_ino, inode->i_generation, inode->i_mode,
80 inode->i_nlink, atomic_read(&inode->i_count),
81 lli->lli_clob, PFID(&lli->lli_fid));
86 static int vvp_attr_get(const struct lu_env *env, struct cl_object *obj,
89 struct inode *inode = vvp_object_inode(obj);
92 * lov overwrites most of these fields in
93 * lov_attr_get()->...lov_merge_lvb_kms(), except when inode
94 * attributes are newer.
97 attr->cat_size = i_size_read(inode);
98 attr->cat_mtime = LTIME_S(inode->i_mtime);
99 attr->cat_atime = LTIME_S(inode->i_atime);
100 attr->cat_ctime = LTIME_S(inode->i_ctime);
101 attr->cat_blocks = inode->i_blocks;
102 attr->cat_uid = from_kuid(&init_user_ns, inode->i_uid);
103 attr->cat_gid = from_kgid(&init_user_ns, inode->i_gid);
104 /* KMS is not known by this layer */
105 return 0; /* layers below have to fill in the rest */
108 static int vvp_attr_update(const struct lu_env *env, struct cl_object *obj,
109 const struct cl_attr *attr, unsigned valid)
111 struct inode *inode = vvp_object_inode(obj);
114 inode->i_uid = make_kuid(&init_user_ns, attr->cat_uid);
116 inode->i_gid = make_kgid(&init_user_ns, attr->cat_gid);
117 if (valid & CAT_ATIME)
118 LTIME_S(inode->i_atime) = attr->cat_atime;
119 if (valid & CAT_MTIME)
120 LTIME_S(inode->i_mtime) = attr->cat_mtime;
121 if (valid & CAT_CTIME)
122 LTIME_S(inode->i_ctime) = attr->cat_ctime;
123 if (0 && valid & CAT_SIZE)
124 i_size_write(inode, attr->cat_size);
125 /* not currently necessary */
126 if (0 && valid & (CAT_UID|CAT_GID|CAT_SIZE))
127 mark_inode_dirty(inode);
131 static int vvp_conf_set(const struct lu_env *env, struct cl_object *obj,
132 const struct cl_object_conf *conf)
134 struct ll_inode_info *lli = ll_i2info(conf->coc_inode);
136 if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
137 CDEBUG(D_VFSTRACE, DFID ": losing layout lock\n",
138 PFID(&lli->lli_fid));
140 ll_layout_version_set(lli, CL_LAYOUT_GEN_NONE);
142 /* Clean up page mmap for this inode.
143 * The reason for us to do this is that if the page has
144 * already been installed into memory space, the process
145 * can access it without interacting with lustre, so this
146 * page may be stale due to layout change, and the process
147 * will never be notified.
148 * This operation is expensive but mmap processes have to pay
149 * a price themselves. */
150 unmap_mapping_range(conf->coc_inode->i_mapping,
151 0, OBD_OBJECT_EOF, 0);
156 static int vvp_prune(const struct lu_env *env, struct cl_object *obj)
158 struct inode *inode = vvp_object_inode(obj);
162 rc = cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_LOCAL, 1);
164 CDEBUG(D_VFSTRACE, DFID ": writeback failed: %d\n",
165 PFID(lu_object_fid(&obj->co_lu)), rc);
169 truncate_inode_pages(inode->i_mapping, 0);
173 static int vvp_object_glimpse(const struct lu_env *env,
174 const struct cl_object *obj, struct ost_lvb *lvb)
176 struct inode *inode = vvp_object_inode(obj);
179 lvb->lvb_mtime = LTIME_S(inode->i_mtime);
180 lvb->lvb_atime = LTIME_S(inode->i_atime);
181 lvb->lvb_ctime = LTIME_S(inode->i_ctime);
184 * LU-417: Add dirty pages block count lest i_blocks reports 0, some
185 * "cp" or "tar" on remote node may think it's a completely sparse file
188 if (lvb->lvb_size > 0 && lvb->lvb_blocks == 0)
189 lvb->lvb_blocks = dirty_cnt(inode);
194 static const struct cl_object_operations vvp_ops = {
195 .coo_page_init = vvp_page_init,
196 .coo_lock_init = vvp_lock_init,
197 .coo_io_init = vvp_io_init,
198 .coo_attr_get = vvp_attr_get,
199 .coo_attr_update = vvp_attr_update,
200 .coo_conf_set = vvp_conf_set,
201 .coo_prune = vvp_prune,
202 .coo_glimpse = vvp_object_glimpse
205 static int vvp_object_init0(const struct lu_env *env,
206 struct vvp_object *vob,
207 const struct cl_object_conf *conf)
209 vob->vob_inode = conf->coc_inode;
210 atomic_set(&vob->vob_transient_pages, 0);
211 cl_object_page_init(&vob->vob_cl, sizeof(struct vvp_page));
215 static int vvp_object_init(const struct lu_env *env, struct lu_object *obj,
216 const struct lu_object_conf *conf)
218 struct vvp_device *dev = lu2vvp_dev(obj->lo_dev);
219 struct vvp_object *vob = lu2vvp(obj);
220 struct lu_object *below;
221 struct lu_device *under;
224 under = &dev->vdv_next->cd_lu_dev;
225 below = under->ld_ops->ldo_object_alloc(env, obj->lo_header, under);
227 const struct cl_object_conf *cconf;
229 cconf = lu2cl_conf(conf);
230 lu_object_add(obj, below);
231 result = vvp_object_init0(env, vob, cconf);
238 static void vvp_object_free(const struct lu_env *env, struct lu_object *obj)
240 struct vvp_object *vob = lu2vvp(obj);
243 lu_object_header_fini(obj->lo_header);
244 OBD_SLAB_FREE_PTR(vob, vvp_object_kmem);
247 static const struct lu_object_operations vvp_lu_obj_ops = {
248 .loo_object_init = vvp_object_init,
249 .loo_object_free = vvp_object_free,
250 .loo_object_print = vvp_object_print,
253 struct vvp_object *cl_inode2vvp(struct inode *inode)
255 struct ll_inode_info *lli = ll_i2info(inode);
256 struct cl_object *obj = lli->lli_clob;
257 struct lu_object *lu;
259 LASSERT(obj != NULL);
260 lu = lu_object_locate(obj->co_lu.lo_header, &vvp_device_type);
266 struct lu_object *vvp_object_alloc(const struct lu_env *env,
267 const struct lu_object_header *unused,
268 struct lu_device *dev)
270 struct vvp_object *vob;
271 struct lu_object *obj;
273 OBD_SLAB_ALLOC_PTR_GFP(vob, vvp_object_kmem, GFP_NOFS);
275 struct cl_object_header *hdr;
277 obj = &vob->vob_cl.co_lu;
278 hdr = &vob->vob_header;
279 cl_object_header_init(hdr);
280 hdr->coh_page_bufsize = cfs_size_round(sizeof(struct cl_page));
282 lu_object_init(obj, &hdr->coh_lu, dev);
283 lu_object_add_top(&hdr->coh_lu, obj);
285 vob->vob_cl.co_ops = &vvp_ops;
286 obj->lo_ops = &vvp_lu_obj_ops;