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36 * lustre/osp/osp_object.c
38 * Lustre OST Proxy Device
40 * Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
41 * Author: Mikhail Pershin <mike.tappro@intel.com>
45 # define EXPORT_SYMTAB
47 #define DEBUG_SUBSYSTEM S_MDS
49 #include "osp_internal.h"
51 static __u64 osp_object_assign_id(const struct lu_env *env,
52 struct osp_device *d, struct osp_object *o)
54 struct osp_thread_info *osi = osp_env_info(env);
55 const struct lu_fid *f = lu_object_fid(&o->opo_obj.do_lu);
57 LASSERT(fid_is_zero(f));
58 LASSERT(o->opo_reserved);
61 /* assign fid to anonymous object */
62 osi->osi_oi.oi_id = osp_precreate_get_id(d);
63 osi->osi_oi.oi_seq = FID_SEQ_OST_MDT0;
64 fid_ostid_unpack(&osi->osi_fid, &osi->osi_oi, d->opd_index);
65 lu_object_assign_fid(env, &o->opo_obj.do_lu, &osi->osi_fid);
67 return osi->osi_oi.oi_id;
70 static int osp_declare_attr_set(const struct lu_env *env, struct dt_object *dt,
71 const struct lu_attr *attr, struct thandle *th)
73 struct osp_device *d = lu2osp_dev(dt->do_lu.lo_dev);
74 struct osp_object *o = dt2osp_obj(dt);
80 * Usually we don't allow server stack to manipulate size
81 * but there is a special case when striping is created
82 * late, after stripless file got truncated to non-zero.
84 * In this case we do the following:
86 * 1) grab id in declare - this can lead to leaked OST objects
87 * but we don't currently have proper mechanism and the only
88 * options we have are to do truncate RPC holding transaction
89 * open (very bad) or to grab id in declare at cost of leaked
90 * OST object in same very rare unfortunate case (just bad)
91 * notice 1.6-2.0 do assignment outside of running transaction
92 * all the time, meaning many more chances for leaked objects.
94 * 2) send synchronous truncate RPC with just assigned id
96 LASSERT(attr != NULL);
97 if (attr->la_valid & LA_SIZE && attr->la_size > 0) {
98 LASSERT(!dt_object_exists(dt));
99 osp_object_assign_id(env, d, o);
100 rc = osp_object_truncate(env, dt, attr->la_size);
105 if (!(attr->la_valid & (LA_UID | LA_GID)))
109 * track all UID/GID changes via llog
111 rc = osp_sync_declare_add(env, o, MDS_SETATTR64_REC, th);
116 static int osp_attr_set(const struct lu_env *env, struct dt_object *dt,
117 const struct lu_attr *attr, struct thandle *th,
118 struct lustre_capa *capa)
120 struct osp_object *o = dt2osp_obj(dt);
125 /* we're interested in uid/gid changes only */
126 if (!(attr->la_valid & (LA_UID | LA_GID)))
130 * once transaction is committed put proper command on
131 * the queue going to our OST
133 rc = osp_sync_add(env, o, MDS_SETATTR64_REC, th, attr);
135 /* XXX: send new uid/gid to OST ASAP? */
140 static int osp_declare_object_create(const struct lu_env *env,
141 struct dt_object *dt,
142 struct lu_attr *attr,
143 struct dt_allocation_hint *hint,
144 struct dt_object_format *dof,
147 struct osp_thread_info *osi = osp_env_info(env);
148 struct osp_device *d = lu2osp_dev(dt->do_lu.lo_dev);
149 struct osp_object *o = dt2osp_obj(dt);
150 const struct lu_fid *fid;
155 LASSERT(d->opd_last_used_file);
156 fid = lu_object_fid(&dt->do_lu);
159 * There can be gaps in precreated ids and record to unlink llog
161 rc = osp_sync_declare_add(env, o, MDS_UNLINK64_REC, th);
163 if (unlikely(!fid_is_zero(fid))) {
164 /* replay case: caller knows fid */
165 osi->osi_off = sizeof(osi->osi_id) * d->opd_index;
166 rc = dt_declare_record_write(env, d->opd_last_used_file,
167 sizeof(osi->osi_id), osi->osi_off,
173 * in declaration we need to reserve object so that we don't block
174 * awaiting precreation RPC to complete
176 rc = osp_precreate_reserve(env, d);
178 * we also need to declare update to local "last used id" file for
179 * recovery if object isn't used for a reason, we need to release
180 * reservation, this can be made in osd_object_release()
183 /* mark id is reserved: in create we don't want to talk
185 LASSERT(o->opo_reserved == 0);
188 /* common for all OSPs file hystorically */
189 osi->osi_off = sizeof(osi->osi_id) * d->opd_index;
190 rc = dt_declare_record_write(env, d->opd_last_used_file,
191 sizeof(osi->osi_id), osi->osi_off,
194 /* not needed in the cache anymore */
195 cfs_set_bit(LU_OBJECT_HEARD_BANSHEE,
196 &dt->do_lu.lo_header->loh_flags);
201 static int osp_object_create(const struct lu_env *env, struct dt_object *dt,
202 struct lu_attr *attr,
203 struct dt_allocation_hint *hint,
204 struct dt_object_format *dof, struct thandle *th)
206 struct osp_thread_info *osi = osp_env_info(env);
207 struct osp_device *d = lu2osp_dev(dt->do_lu.lo_dev);
208 struct osp_object *o = dt2osp_obj(dt);
213 if (o->opo_reserved) {
214 /* regular case, id is assigned holding transaction open */
215 osi->osi_id = osp_object_assign_id(env, d, o);
217 /* special case, id was assigned outside of transaction
218 * see comments in osp_declare_attr_set */
219 rc = fid_ostid_pack(lu_object_fid(&dt->do_lu), &osi->osi_oi);
221 osi->osi_id = ostid_id(&osi->osi_oi);
222 cfs_spin_lock(&d->opd_pre_lock);
223 osp_update_last_id(d, osi->osi_id);
224 cfs_spin_unlock(&d->opd_pre_lock);
227 LASSERT(osi->osi_id);
230 * it's OK if the import is inactive by this moment - id was created
231 * by OST earlier, we just need to maintain it consistently on the disk
232 * once import is reconnected, OSP will claim this and other objects
233 * used and OST either keep them, if they exist or recreate
236 /* we might have lost precreated objects */
237 if (unlikely(d->opd_gap_count) > 0) {
238 cfs_spin_lock(&d->opd_pre_lock);
239 if (d->opd_gap_count > 0) {
240 int count = d->opd_gap_count;
242 osi->osi_oi.oi_id = d->opd_gap_start;
243 d->opd_gap_count = 0;
244 cfs_spin_unlock(&d->opd_pre_lock);
246 CDEBUG(D_HA, "Found gap "LPU64"+%d in objids\n",
247 d->opd_gap_start, count);
248 /* real gap handling is disabled intil ORI-692 will be
249 * fixed, now we only report gaps */
251 cfs_spin_unlock(&d->opd_pre_lock);
255 osp_objid_buf_prep(osi, d, d->opd_index);
256 rc = dt_record_write(env, d->opd_last_used_file, &osi->osi_lb,
262 static int osp_declare_object_destroy(const struct lu_env *env,
263 struct dt_object *dt, struct thandle *th)
265 struct osp_object *o = dt2osp_obj(dt);
271 * track objects to be destroyed via llog
273 rc = osp_sync_declare_add(env, o, MDS_UNLINK64_REC, th);
278 static int osp_object_destroy(const struct lu_env *env, struct dt_object *dt,
281 struct osp_object *o = dt2osp_obj(dt);
287 * once transaction is committed put proper command on
288 * the queue going to our OST
290 rc = osp_sync_add(env, o, MDS_UNLINK64_REC, th, NULL);
292 /* not needed in cache any more */
293 cfs_set_bit(LU_OBJECT_HEARD_BANSHEE, &dt->do_lu.lo_header->loh_flags);
298 struct dt_object_operations osp_obj_ops = {
299 .do_declare_attr_set = osp_declare_attr_set,
300 .do_attr_set = osp_attr_set,
301 .do_declare_create = osp_declare_object_create,
302 .do_create = osp_object_create,
303 .do_declare_destroy = osp_declare_object_destroy,
304 .do_destroy = osp_object_destroy,
307 static int osp_object_init(const struct lu_env *env, struct lu_object *o,
308 const struct lu_object_conf *unused)
310 struct osp_object *po = lu2osp_obj(o);
312 po->opo_obj.do_ops = &osp_obj_ops;
317 static void osp_object_free(const struct lu_env *env, struct lu_object *o)
319 struct osp_object *obj = lu2osp_obj(o);
320 struct lu_object_header *h = o->lo_header;
322 dt_object_fini(&obj->opo_obj);
323 lu_object_header_fini(h);
324 OBD_SLAB_FREE_PTR(obj, osp_object_kmem);
327 static void osp_object_release(const struct lu_env *env, struct lu_object *o)
329 struct osp_object *po = lu2osp_obj(o);
330 struct osp_device *d = lu2osp_dev(o->lo_dev);
335 * release reservation if object was declared but not created
336 * this may require lu_object_put() in LOD
338 if (unlikely(po->opo_reserved)) {
339 LASSERT(d->opd_pre_reserved > 0);
340 cfs_spin_lock(&d->opd_pre_lock);
341 d->opd_pre_reserved--;
342 cfs_spin_unlock(&d->opd_pre_lock);
344 /* not needed in cache any more */
345 cfs_set_bit(LU_OBJECT_HEARD_BANSHEE, &o->lo_header->loh_flags);
350 static int osp_object_print(const struct lu_env *env, void *cookie,
351 lu_printer_t p, const struct lu_object *l)
353 const struct osp_object *o = lu2osp_obj((struct lu_object *)l);
355 return (*p)(env, cookie, LUSTRE_OSP_NAME"-object@%p", o);
358 static int osp_object_invariant(const struct lu_object *o)
363 struct lu_object_operations osp_lu_obj_ops = {
364 .loo_object_init = osp_object_init,
365 .loo_object_free = osp_object_free,
366 .loo_object_release = osp_object_release,
367 .loo_object_print = osp_object_print,
368 .loo_object_invariant = osp_object_invariant