4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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.sun.com/software/products/lustre/docs/GPLv2.pdf
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
27 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #ifndef _LUSTRE_LU_TARGET_H
38 #define _LUSTRE_LU_TARGET_H
40 #include <dt_object.h>
41 #include <lustre_export.h>
42 #include <lustre_update.h>
43 #include <lustre_disk.h>
46 struct obd_device *lut_obd;
47 struct dt_device *lut_bottom;
49 /* supported opcodes and handlers for this target */
50 struct tgt_opc_slice *lut_slice;
51 __u32 lut_reply_fail_id;
52 __u32 lut_request_fail_id;
55 rwlock_t lut_sptlrpc_lock;
56 struct sptlrpc_rule_set lut_sptlrpc_rset;
57 spinlock_t lut_flags_lock;
59 unsigned int lut_mds_capa:1,
62 lut_sync_lock_cancel:2,
66 struct dt_object *lut_last_rcvd;
67 /* transaction callbacks */
68 struct dt_txn_callback lut_txn_cb;
69 /** server data in last_rcvd file */
70 struct lr_server_data lut_lsd;
71 /** Server last transaction number */
72 __u64 lut_last_transno;
73 /** Lock protecting last transaction number */
74 spinlock_t lut_translock;
75 /** Lock protecting client bitmap */
76 spinlock_t lut_client_bitmap_lock;
77 /** Bitmap of known clients */
78 unsigned long *lut_client_bitmap;
81 extern struct lu_context_key tgt_session_key;
83 struct tgt_session_info {
85 * The following members will be filled explicitly
86 * with specific data in tgt_ses_init().
88 struct req_capsule *tsi_pill;
91 * Lock request for "habeo clavis" operations.
93 struct ldlm_request *tsi_dlm_req;
95 /* although we have export in req, there are cases when it is not
96 * available, e.g. closing files upon export destroy */
97 struct obd_export *tsi_exp;
98 const struct lu_env *tsi_env;
99 struct lu_target *tsi_tgt;
101 const struct mdt_body *tsi_mdt_body;
102 struct ost_body *tsi_ost_body;
103 struct lu_object *tsi_corpus;
105 struct lu_fid tsi_fid;
106 struct ldlm_res_id tsi_resid;
108 /* object affected by VBR, for last_rcvd_update */
109 struct dt_object *tsi_vbr_obj;
110 /* opdata for mdt_reint_open(), has the same value as
111 * ldlm_reply:lock_policy_res1. The tgt_update_last_rcvd() stores
112 * this value onto disk for recovery when tgt_txn_stop_cb() is called.
117 * Additional fail id that can be set by handler.
119 int tsi_reply_fail_id;
124 static inline struct tgt_session_info *tgt_ses_info(const struct lu_env *env)
126 struct tgt_session_info *tsi;
128 LASSERT(env->le_ses != NULL);
129 tsi = lu_context_key_get(env->le_ses, &tgt_session_key);
134 static inline void tgt_vbr_obj_set(const struct lu_env *env,
135 struct dt_object *obj)
137 struct tgt_session_info *tsi;
139 if (env->le_ses != NULL) {
140 tsi = tgt_ses_info(env);
141 tsi->tsi_vbr_obj = obj;
145 static inline void tgt_opdata_set(const struct lu_env *env, __u64 flags)
147 struct tgt_session_info *tsi;
149 if (env->le_ses != NULL) {
150 tsi = tgt_ses_info(env);
151 tsi->tsi_opdata |= flags;
155 static inline void tgt_opdata_clear(const struct lu_env *env, __u64 flags)
157 struct tgt_session_info *tsi;
159 if (env->le_ses != NULL) {
160 tsi = tgt_ses_info(env);
161 tsi->tsi_opdata &= ~flags;
166 * Generic unified target support.
168 enum tgt_handler_flags {
170 * struct *_body is passed in the incoming message, and object
171 * identified by this fid exists on disk.
173 * "habeo corpus" == "I have a body"
175 HABEO_CORPUS = (1 << 0),
177 * struct ldlm_request is passed in the incoming message.
179 * "habeo clavis" == "I have a key"
181 HABEO_CLAVIS = (1 << 1),
183 * this request has fixed reply format, so that reply message can be
184 * packed by generic code.
186 * "habeo refero" == "I have a reply"
188 HABEO_REFERO = (1 << 2),
190 * this request will modify something, so check whether the file system
191 * is readonly or not, then return -EROFS to client asap if necessary.
193 * "mutabor" == "I shall modify"
199 /* The name of this handler. */
201 /* Fail id, check at the beginning */
205 /* Flags in enum tgt_handler_flags */
207 /* Request version for this opcode */
209 /* Handler function */
210 int (*th_act)(struct tgt_session_info *tti);
211 /* Handler function for high priority requests */
212 int (*th_hp)(struct tgt_session_info *tti);
213 /* Request format for this request */
214 const struct req_format *th_fmt;
217 struct tgt_opc_slice {
218 __u32 tos_opc_start; /* First op code */
219 __u32 tos_opc_end; /* Last op code */
220 struct tgt_handler *tos_hs; /* Registered handler */
223 static inline struct ptlrpc_request *tgt_ses_req(struct tgt_session_info *tsi)
225 return tsi->tsi_pill ? tsi->tsi_pill->rc_req : NULL;
228 static inline __u64 tgt_conn_flags(struct tgt_session_info *tsi)
230 LASSERT(tsi->tsi_exp);
231 return exp_connect_flags(tsi->tsi_exp);
234 static inline int req_is_replay(struct ptlrpc_request *req)
236 LASSERT(req->rq_reqmsg);
237 return !!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY);
240 /* target/tgt_handler.c */
241 int tgt_request_handle(struct ptlrpc_request *req);
242 char *tgt_name(struct lu_target *tgt);
243 void tgt_counter_incr(struct obd_export *exp, int opcode);
244 int tgt_connect_check_sptlrpc(struct ptlrpc_request *req,
245 struct obd_export *exp);
246 int tgt_adapt_sptlrpc_conf(struct lu_target *tgt, int initial);
247 int tgt_connect(struct tgt_session_info *tsi);
248 int tgt_disconnect(struct tgt_session_info *uti);
249 int tgt_obd_ping(struct tgt_session_info *tsi);
250 int tgt_enqueue(struct tgt_session_info *tsi);
251 int tgt_convert(struct tgt_session_info *tsi);
252 int tgt_bl_callback(struct tgt_session_info *tsi);
253 int tgt_cp_callback(struct tgt_session_info *tsi);
254 int tgt_llog_open(struct tgt_session_info *tsi);
255 int tgt_llog_close(struct tgt_session_info *tsi);
256 int tgt_llog_destroy(struct tgt_session_info *tsi);
257 int tgt_llog_read_header(struct tgt_session_info *tsi);
258 int tgt_llog_next_block(struct tgt_session_info *tsi);
259 int tgt_llog_prev_block(struct tgt_session_info *tsi);
260 int tgt_sec_ctx_init(struct tgt_session_info *tsi);
261 int tgt_sec_ctx_init_cont(struct tgt_session_info *tsi);
262 int tgt_sec_ctx_fini(struct tgt_session_info *tsi);
263 int tgt_sendpage(struct tgt_session_info *tsi, struct lu_rdpg *rdpg, int nob);
264 int tgt_validate_obdo(struct tgt_session_info *tsi, struct obdo *oa);
265 int tgt_sync(const struct lu_env *env, struct lu_target *tgt,
266 struct dt_object *obj);
268 int tgt_io_thread_init(struct ptlrpc_thread *thread);
269 void tgt_io_thread_done(struct ptlrpc_thread *thread);
271 int tgt_extent_lock(struct ldlm_namespace *ns, struct ldlm_res_id *res_id,
272 __u64 start, __u64 end, struct lustre_handle *lh,
273 int mode, __u64 *flags);
274 void tgt_extent_unlock(struct lustre_handle *lh, ldlm_mode_t mode);
275 int tgt_brw_lock(struct ldlm_namespace *ns, struct ldlm_res_id *res_id,
276 struct obd_ioobj *obj, struct niobuf_remote *nb,
277 struct lustre_handle *lh, int mode);
278 void tgt_brw_unlock(struct obd_ioobj *obj, struct niobuf_remote *niob,
279 struct lustre_handle *lh, int mode);
280 int tgt_brw_read(struct tgt_session_info *tsi);
281 int tgt_brw_write(struct tgt_session_info *tsi);
282 int tgt_hpreq_handler(struct ptlrpc_request *req);
284 extern struct tgt_handler tgt_sec_ctx_handlers[];
285 extern struct tgt_handler tgt_obd_handlers[];
286 extern struct tgt_handler tgt_dlm_handlers[];
287 extern struct tgt_handler tgt_llog_handlers[];
288 extern struct tgt_handler tgt_out_handlers[];
289 extern struct tgt_handler fld_handlers[];
290 extern struct tgt_handler seq_handlers[];
292 typedef void (*tgt_cb_t)(struct lu_target *lut, __u64 transno,
293 void *data, int err);
294 struct tgt_commit_cb {
295 tgt_cb_t tgt_cb_func;
299 /* target/tgt_main.c */
300 void tgt_boot_epoch_update(struct lu_target *lut);
301 int tgt_last_commit_cb_add(struct thandle *th, struct lu_target *lut,
302 struct obd_export *exp, __u64 transno);
303 int tgt_new_client_cb_add(struct thandle *th, struct obd_export *exp);
304 int tgt_init(const struct lu_env *env, struct lu_target *lut,
305 struct obd_device *obd, struct dt_device *dt,
306 struct tgt_opc_slice *slice,
307 int request_fail_id, int reply_fail_id);
308 void tgt_fini(const struct lu_env *env, struct lu_target *lut);
309 int tgt_client_alloc(struct obd_export *exp);
310 void tgt_client_free(struct obd_export *exp);
311 int tgt_client_del(const struct lu_env *env, struct obd_export *exp);
312 int tgt_client_add(const struct lu_env *env, struct obd_export *exp, int);
313 int tgt_client_new(const struct lu_env *env, struct obd_export *exp);
314 int tgt_client_data_read(const struct lu_env *env, struct lu_target *tg,
315 struct lsd_client_data *lcd, loff_t *off, int index);
316 int tgt_client_data_write(const struct lu_env *env, struct lu_target *tg,
317 struct lsd_client_data *lcd, loff_t *off, struct thandle *th);
318 int tgt_server_data_read(const struct lu_env *env, struct lu_target *tg);
319 int tgt_server_data_write(const struct lu_env *env, struct lu_target *tg,
321 int tgt_server_data_update(const struct lu_env *env, struct lu_target *tg,
323 int tgt_truncate_last_rcvd(const struct lu_env *env, struct lu_target *tg,
330 static inline int err_serious(int rc)
333 return -(-rc | ESERIOUS);
336 static inline int clear_serious(int rc)
339 rc = -(-rc & ~ESERIOUS);
343 static inline int is_serious(int rc)
345 return (rc < 0 && -rc & ESERIOUS);
349 * Do not return server-side uid/gid to remote client
351 static inline void tgt_drop_id(struct obd_export *exp, struct obdo *oa)
353 if (unlikely(exp_connect_rmtclient(exp))) {
356 oa->o_valid &= ~(OBD_MD_FLUID | OBD_MD_FLGID);
361 * Unified target generic handers macros and generic functions.
363 #define TGT_RPC_HANDLER(base, flags, opc, fn, fmt, version) \
366 .th_fail_id = OBD_FAIL_ ## opc ## _NET, \
371 .th_version = version \
374 /* MDT Request with a format known in advance */
375 #define TGT_MDT_HDL(flags, name, fn) \
376 TGT_RPC_HANDLER(MDS_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
378 /* Request with a format we do not yet know */
379 #define TGT_MDT_HDL_VAR(flags, name, fn) \
380 TGT_RPC_HANDLER(MDS_FIRST_OPC, flags, name, fn, NULL, \
383 /* MDT Request with a format known in advance */
384 #define TGT_OST_HDL(flags, name, fn) \
385 TGT_RPC_HANDLER(OST_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
388 /* MGS request with a format known in advance */
389 #define TGT_MGS_HDL(flags, name, fn) \
390 TGT_RPC_HANDLER(MGS_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
392 #define TGT_MGS_HDL_VAR(flags, name, fn) \
393 TGT_RPC_HANDLER(MGS_FIRST_OPC, flags, name, fn, NULL, \
397 * OBD handler macros and generic functions.
399 #define TGT_OBD_HDL(flags, name, fn) \
400 TGT_RPC_HANDLER(OBD_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
402 #define TGT_OBD_HDL_VAR(flags, name, fn) \
403 TGT_RPC_HANDLER(OBD_FIRST_OPC, flags, name, fn, NULL, \
407 * DLM handler macros and generic functions.
409 #define TGT_DLM_HDL_VAR(flags, name, fn) \
410 TGT_RPC_HANDLER(LDLM_FIRST_OPC, flags, name, fn, NULL, \
412 #define TGT_DLM_HDL(flags, name, fn) \
413 TGT_RPC_HANDLER(LDLM_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
417 * LLOG handler macros and generic functions.
419 #define TGT_LLOG_HDL_VAR(flags, name, fn) \
420 TGT_RPC_HANDLER(LLOG_FIRST_OPC, flags, name, fn, NULL, \
422 #define TGT_LLOG_HDL(flags, name, fn) \
423 TGT_RPC_HANDLER(LLOG_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
427 * Sec context handler macros and generic functions.
429 #define TGT_SEC_HDL_VAR(flags, name, fn) \
430 TGT_RPC_HANDLER(SEC_FIRST_OPC, flags, name, fn, NULL, \
433 #define TGT_QUOTA_HDL(flags, name, fn) \
434 TGT_RPC_HANDLER(QUOTA_DQACQ, flags, name, fn, &RQF_ ## name, \
437 /* Sequence service handlers */
438 #define TGT_SEQ_HDL(flags, name, fn) \
439 TGT_RPC_HANDLER(SEQ_QUERY, flags, name, fn, &RQF_ ## name, \
442 /* FID Location Database handlers */
443 #define TGT_FLD_HDL_VAR(flags, name, fn) \
444 TGT_RPC_HANDLER(FLD_QUERY, flags, name, fn, NULL, \
447 /* Request with a format known in advance */
448 #define TGT_UPDATE_HDL(flags, name, fn) \
449 TGT_RPC_HANDLER(UPDATE_OBJ, flags, name, fn, &RQF_ ## name, \
452 #endif /* __LUSTRE_LU_TARGET_H */