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27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
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30 * Copyright (c) 2011, 2014, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * Implementation of cl_object for OSC layer.
38 * Author: Nikita Danilov <nikita.danilov@sun.com>
39 * Author: Jinshan Xiong <jinshan.xiong@intel.com>
42 #define DEBUG_SUBSYSTEM S_OSC
44 #include "osc_cl_internal.h"
50 /*****************************************************************************
56 static struct lu_object *osc2lu(struct osc_object *osc)
58 return &osc->oo_cl.co_lu;
61 static struct osc_object *lu2osc(const struct lu_object *obj)
63 LINVRNT(osc_is_object(obj));
64 return container_of0(obj, struct osc_object, oo_cl.co_lu);
67 /*****************************************************************************
73 static int osc_object_init(const struct lu_env *env, struct lu_object *obj,
74 const struct lu_object_conf *conf)
76 struct osc_object *osc = lu2osc(obj);
77 const struct cl_object_conf *cconf = lu2cl_conf(conf);
79 osc->oo_oinfo = cconf->u.coc_oinfo;
80 #ifdef CONFIG_LUSTRE_DEBUG_EXPENSIVE_CHECK
81 mutex_init(&osc->oo_debug_mutex);
83 INIT_LIST_HEAD(&osc->oo_ready_item);
84 INIT_LIST_HEAD(&osc->oo_hp_ready_item);
85 INIT_LIST_HEAD(&osc->oo_write_item);
86 INIT_LIST_HEAD(&osc->oo_read_item);
88 osc->oo_root.rb_node = NULL;
89 INIT_LIST_HEAD(&osc->oo_hp_exts);
90 INIT_LIST_HEAD(&osc->oo_urgent_exts);
91 INIT_LIST_HEAD(&osc->oo_rpc_exts);
92 INIT_LIST_HEAD(&osc->oo_reading_exts);
93 atomic_set(&osc->oo_nr_reads, 0);
94 atomic_set(&osc->oo_nr_writes, 0);
95 spin_lock_init(&osc->oo_lock);
96 spin_lock_init(&osc->oo_tree_lock);
97 spin_lock_init(&osc->oo_ol_spin);
98 INIT_LIST_HEAD(&osc->oo_ol_list);
100 cl_object_page_init(lu2cl(obj), sizeof(struct osc_page));
105 static void osc_object_free(const struct lu_env *env, struct lu_object *obj)
107 struct osc_object *osc = lu2osc(obj);
109 LASSERT(list_empty(&osc->oo_ready_item));
110 LASSERT(list_empty(&osc->oo_hp_ready_item));
111 LASSERT(list_empty(&osc->oo_write_item));
112 LASSERT(list_empty(&osc->oo_read_item));
114 LASSERT(osc->oo_root.rb_node == NULL);
115 LASSERT(list_empty(&osc->oo_hp_exts));
116 LASSERT(list_empty(&osc->oo_urgent_exts));
117 LASSERT(list_empty(&osc->oo_rpc_exts));
118 LASSERT(list_empty(&osc->oo_reading_exts));
119 LASSERT(atomic_read(&osc->oo_nr_reads) == 0);
120 LASSERT(atomic_read(&osc->oo_nr_writes) == 0);
121 LASSERT(list_empty(&osc->oo_ol_list));
124 OBD_SLAB_FREE_PTR(osc, osc_object_kmem);
127 int osc_lvb_print(const struct lu_env *env, void *cookie,
128 lu_printer_t p, const struct ost_lvb *lvb)
130 return (*p)(env, cookie, "size: "LPU64" mtime: "LPU64" atime: "LPU64" "
131 "ctime: "LPU64" blocks: "LPU64,
132 lvb->lvb_size, lvb->lvb_mtime, lvb->lvb_atime,
133 lvb->lvb_ctime, lvb->lvb_blocks);
136 static int osc_object_print(const struct lu_env *env, void *cookie,
137 lu_printer_t p, const struct lu_object *obj)
139 struct osc_object *osc = lu2osc(obj);
140 struct lov_oinfo *oinfo = osc->oo_oinfo;
141 struct osc_async_rc *ar = &oinfo->loi_ar;
143 (*p)(env, cookie, "id: "DOSTID" "
144 "idx: %d gen: %d kms_valid: %u kms "LPU64" "
145 "rc: %d force_sync: %d min_xid: "LPU64" ",
146 POSTID(&oinfo->loi_oi), oinfo->loi_ost_idx,
147 oinfo->loi_ost_gen, oinfo->loi_kms_valid, oinfo->loi_kms,
148 ar->ar_rc, ar->ar_force_sync, ar->ar_min_xid);
149 osc_lvb_print(env, cookie, p, &oinfo->loi_lvb);
154 static int osc_attr_get(const struct lu_env *env, struct cl_object *obj,
155 struct cl_attr *attr)
157 struct lov_oinfo *oinfo = cl2osc(obj)->oo_oinfo;
159 cl_lvb2attr(attr, &oinfo->loi_lvb);
160 attr->cat_kms = oinfo->loi_kms_valid ? oinfo->loi_kms : 0;
164 static int osc_attr_update(const struct lu_env *env, struct cl_object *obj,
165 const struct cl_attr *attr, unsigned valid)
167 struct lov_oinfo *oinfo = cl2osc(obj)->oo_oinfo;
168 struct ost_lvb *lvb = &oinfo->loi_lvb;
170 if (valid & CAT_SIZE)
171 lvb->lvb_size = attr->cat_size;
172 if (valid & CAT_MTIME)
173 lvb->lvb_mtime = attr->cat_mtime;
174 if (valid & CAT_ATIME)
175 lvb->lvb_atime = attr->cat_atime;
176 if (valid & CAT_CTIME)
177 lvb->lvb_ctime = attr->cat_ctime;
178 if (valid & CAT_BLOCKS)
179 lvb->lvb_blocks = attr->cat_blocks;
180 if (valid & CAT_KMS) {
181 CDEBUG(D_CACHE, "set kms from "LPU64"to "LPU64"\n",
182 oinfo->loi_kms, (__u64)attr->cat_kms);
183 loi_kms_set(oinfo, attr->cat_kms);
188 static int osc_object_glimpse(const struct lu_env *env,
189 const struct cl_object *obj, struct ost_lvb *lvb)
191 struct lov_oinfo *oinfo = cl2osc(obj)->oo_oinfo;
194 lvb->lvb_size = oinfo->loi_kms;
195 lvb->lvb_blocks = oinfo->loi_lvb.lvb_blocks;
199 static int osc_object_ast_clear(struct ldlm_lock *lock, void *data)
203 if (lock->l_ast_data == data)
204 lock->l_ast_data = NULL;
205 RETURN(LDLM_ITER_CONTINUE);
208 static int osc_object_prune(const struct lu_env *env, struct cl_object *obj)
210 struct osc_object *osc = cl2osc(obj);
211 struct ldlm_res_id *resname = &osc_env_info(env)->oti_resname;
213 LASSERTF(osc->oo_npages == 0,
214 DFID "still have %lu pages, obj: %p, osc: %p\n",
215 PFID(lu_object_fid(&obj->co_lu)), osc->oo_npages, obj, osc);
217 /* DLM locks don't hold a reference of osc_object so we have to
218 * clear it before the object is being destroyed. */
219 ostid_build_res_name(&osc->oo_oinfo->loi_oi, resname);
220 ldlm_resource_iterate(osc_export(osc)->exp_obd->obd_namespace, resname,
221 osc_object_ast_clear, osc);
225 * Find any ldlm lock covers the osc object.
226 * \retval 0 not found
230 static int osc_object_find_cbdata(const struct lu_env *env,
231 struct cl_object *obj, ldlm_iterator_t iter,
234 struct ldlm_res_id res_id;
235 struct obd_device *obd;
238 ostid_build_res_name(&cl2osc(obj)->oo_oinfo->loi_oi, &res_id);
239 obd = obj->co_lu.lo_dev->ld_obd;
240 rc = ldlm_resource_iterate(obd->obd_namespace, &res_id, iter, data);
241 if (rc == LDLM_ITER_STOP)
244 if (rc == LDLM_ITER_CONTINUE)
250 static int osc_object_fiemap(const struct lu_env *env, struct cl_object *obj,
251 struct ll_fiemap_info_key *fmkey,
252 struct fiemap *fiemap, size_t *buflen)
254 struct obd_export *exp = osc_export(cl2osc(obj));
255 struct ldlm_res_id resid;
256 union ldlm_policy_data policy;
257 struct lustre_handle lockh;
258 enum ldlm_mode mode = LCK_MINMODE;
259 struct ptlrpc_request *req;
260 struct fiemap *reply;
265 fmkey->lfik_oa.o_oi = cl2osc(obj)->oo_oinfo->loi_oi;
266 if (!(fmkey->lfik_fiemap.fm_flags & FIEMAP_FLAG_SYNC))
269 policy.l_extent.start = fmkey->lfik_fiemap.fm_start & PAGE_CACHE_MASK;
271 if (OBD_OBJECT_EOF - fmkey->lfik_fiemap.fm_length <=
272 fmkey->lfik_fiemap.fm_start + PAGE_CACHE_SIZE - 1)
273 policy.l_extent.end = OBD_OBJECT_EOF;
275 policy.l_extent.end = (fmkey->lfik_fiemap.fm_start +
276 fmkey->lfik_fiemap.fm_length +
277 PAGE_CACHE_SIZE - 1) & PAGE_CACHE_MASK;
279 ostid_build_res_name(&fmkey->lfik_oa.o_oi, &resid);
280 mode = ldlm_lock_match(exp->exp_obd->obd_namespace,
281 LDLM_FL_BLOCK_GRANTED | LDLM_FL_LVB_READY,
282 &resid, LDLM_EXTENT, &policy,
283 LCK_PR | LCK_PW, &lockh, 0);
284 if (mode) { /* lock is cached on client */
285 if (mode != LCK_PR) {
286 ldlm_lock_addref(&lockh, LCK_PR);
287 ldlm_lock_decref(&lockh, LCK_PW);
289 } else { /* no cached lock, needs acquire lock on server side */
290 fmkey->lfik_oa.o_valid |= OBD_MD_FLFLAGS;
291 fmkey->lfik_oa.o_flags |= OBD_FL_SRVLOCK;
295 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
296 &RQF_OST_GET_INFO_FIEMAP);
298 GOTO(drop_lock, rc = -ENOMEM);
300 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_KEY, RCL_CLIENT,
302 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL, RCL_CLIENT,
304 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL, RCL_SERVER,
307 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
309 ptlrpc_request_free(req);
312 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_KEY);
313 memcpy(tmp, fmkey, sizeof(*fmkey));
314 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_VAL);
315 memcpy(tmp, fiemap, *buflen);
316 ptlrpc_request_set_replen(req);
318 rc = ptlrpc_queue_wait(req);
322 reply = req_capsule_server_get(&req->rq_pill, &RMF_FIEMAP_VAL);
324 GOTO(fini_req, rc = -EPROTO);
326 memcpy(fiemap, reply, *buflen);
328 ptlrpc_req_finished(req);
331 ldlm_lock_decref(&lockh, LCK_PR);
335 void osc_object_set_contended(struct osc_object *obj)
337 obj->oo_contention_time = cfs_time_current();
339 obj->oo_contended = 1;
342 void osc_object_clear_contended(struct osc_object *obj)
344 obj->oo_contended = 0;
347 int osc_object_is_contended(struct osc_object *obj)
349 struct osc_device *dev = lu2osc_dev(obj->oo_cl.co_lu.lo_dev);
350 int osc_contention_time = dev->od_contention_time;
351 cfs_time_t cur_time = cfs_time_current();
352 cfs_time_t retry_time;
354 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_OBJECT_CONTENTION))
357 if (!obj->oo_contended)
361 * I like copy-paste. the code is copied from
362 * ll_file_is_contended.
364 retry_time = cfs_time_add(obj->oo_contention_time,
365 cfs_time_seconds(osc_contention_time));
366 if (cfs_time_after(cur_time, retry_time)) {
367 osc_object_clear_contended(obj);
373 static const struct cl_object_operations osc_ops = {
374 .coo_page_init = osc_page_init,
375 .coo_lock_init = osc_lock_init,
376 .coo_io_init = osc_io_init,
377 .coo_attr_get = osc_attr_get,
378 .coo_attr_update = osc_attr_update,
379 .coo_glimpse = osc_object_glimpse,
380 .coo_prune = osc_object_prune,
381 .coo_find_cbdata = osc_object_find_cbdata,
382 .coo_fiemap = osc_object_fiemap,
385 static const struct lu_object_operations osc_lu_obj_ops = {
386 .loo_object_init = osc_object_init,
387 .loo_object_release = NULL,
388 .loo_object_free = osc_object_free,
389 .loo_object_print = osc_object_print,
390 .loo_object_invariant = NULL
393 struct lu_object *osc_object_alloc(const struct lu_env *env,
394 const struct lu_object_header *unused,
395 struct lu_device *dev)
397 struct osc_object *osc;
398 struct lu_object *obj;
400 OBD_SLAB_ALLOC_PTR_GFP(osc, osc_object_kmem, GFP_NOFS);
403 lu_object_init(obj, NULL, dev);
404 osc->oo_cl.co_ops = &osc_ops;
405 obj->lo_ops = &osc_lu_obj_ops;