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;
120 bool tsi_preprocessed;
125 static inline struct tgt_session_info *tgt_ses_info(const struct lu_env *env)
127 struct tgt_session_info *tsi;
129 LASSERT(env->le_ses != NULL);
130 tsi = lu_context_key_get(env->le_ses, &tgt_session_key);
135 static inline void tgt_vbr_obj_set(const struct lu_env *env,
136 struct dt_object *obj)
138 struct tgt_session_info *tsi;
140 if (env->le_ses != NULL) {
141 tsi = tgt_ses_info(env);
142 tsi->tsi_vbr_obj = obj;
146 static inline void tgt_opdata_set(const struct lu_env *env, __u64 flags)
148 struct tgt_session_info *tsi;
150 if (env->le_ses != NULL) {
151 tsi = tgt_ses_info(env);
152 tsi->tsi_opdata |= flags;
156 static inline void tgt_opdata_clear(const struct lu_env *env, __u64 flags)
158 struct tgt_session_info *tsi;
160 if (env->le_ses != NULL) {
161 tsi = tgt_ses_info(env);
162 tsi->tsi_opdata &= ~flags;
167 * Generic unified target support.
169 enum tgt_handler_flags {
171 * struct *_body is passed in the incoming message, and object
172 * identified by this fid exists on disk.
174 * "habeo corpus" == "I have a body"
176 HABEO_CORPUS = (1 << 0),
178 * struct ldlm_request is passed in the incoming message.
180 * "habeo clavis" == "I have a key"
182 HABEO_CLAVIS = (1 << 1),
184 * this request has fixed reply format, so that reply message can be
185 * packed by generic code.
187 * "habeo refero" == "I have a reply"
189 HABEO_REFERO = (1 << 2),
191 * this request will modify something, so check whether the file system
192 * is readonly or not, then return -EROFS to client asap if necessary.
194 * "mutabor" == "I shall modify"
200 /* The name of this handler. */
202 /* Fail id, check at the beginning */
206 /* Flags in enum tgt_handler_flags */
208 /* Request version for this opcode */
210 /* Handler function */
211 int (*th_act)(struct tgt_session_info *tsi);
212 /* Handler function for high priority requests */
213 void (*th_hp)(struct tgt_session_info *tsi);
214 /* Request format for this request */
215 const struct req_format *th_fmt;
218 struct tgt_opc_slice {
219 __u32 tos_opc_start; /* First op code */
220 __u32 tos_opc_end; /* Last op code */
221 struct tgt_handler *tos_hs; /* Registered handler */
224 static inline struct ptlrpc_request *tgt_ses_req(struct tgt_session_info *tsi)
226 return tsi->tsi_pill ? tsi->tsi_pill->rc_req : NULL;
229 static inline __u64 tgt_conn_flags(struct tgt_session_info *tsi)
231 LASSERT(tsi->tsi_exp);
232 return exp_connect_flags(tsi->tsi_exp);
235 static inline int req_is_replay(struct ptlrpc_request *req)
237 LASSERT(req->rq_reqmsg);
238 return !!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY);
241 /* target/tgt_handler.c */
242 int tgt_request_handle(struct ptlrpc_request *req);
243 char *tgt_name(struct lu_target *tgt);
244 void tgt_counter_incr(struct obd_export *exp, int opcode);
245 int tgt_connect_check_sptlrpc(struct ptlrpc_request *req,
246 struct obd_export *exp);
247 int tgt_adapt_sptlrpc_conf(struct lu_target *tgt, int initial);
248 int tgt_connect(struct tgt_session_info *tsi);
249 int tgt_disconnect(struct tgt_session_info *uti);
250 int tgt_obd_ping(struct tgt_session_info *tsi);
251 int tgt_enqueue(struct tgt_session_info *tsi);
252 int tgt_convert(struct tgt_session_info *tsi);
253 int tgt_bl_callback(struct tgt_session_info *tsi);
254 int tgt_cp_callback(struct tgt_session_info *tsi);
255 int tgt_llog_open(struct tgt_session_info *tsi);
256 int tgt_llog_close(struct tgt_session_info *tsi);
257 int tgt_llog_destroy(struct tgt_session_info *tsi);
258 int tgt_llog_read_header(struct tgt_session_info *tsi);
259 int tgt_llog_next_block(struct tgt_session_info *tsi);
260 int tgt_llog_prev_block(struct tgt_session_info *tsi);
261 int tgt_sec_ctx_init(struct tgt_session_info *tsi);
262 int tgt_sec_ctx_init_cont(struct tgt_session_info *tsi);
263 int tgt_sec_ctx_fini(struct tgt_session_info *tsi);
264 int tgt_sendpage(struct tgt_session_info *tsi, struct lu_rdpg *rdpg, int nob);
265 int tgt_validate_obdo(struct tgt_session_info *tsi, struct obdo *oa);
266 int tgt_sync(const struct lu_env *env, struct lu_target *tgt,
267 struct dt_object *obj);
269 int tgt_io_thread_init(struct ptlrpc_thread *thread);
270 void tgt_io_thread_done(struct ptlrpc_thread *thread);
272 int tgt_extent_lock(struct ldlm_namespace *ns, struct ldlm_res_id *res_id,
273 __u64 start, __u64 end, struct lustre_handle *lh,
274 int mode, __u64 *flags);
275 void tgt_extent_unlock(struct lustre_handle *lh, ldlm_mode_t mode);
276 int tgt_brw_lock(struct ldlm_namespace *ns, struct ldlm_res_id *res_id,
277 struct obd_ioobj *obj, struct niobuf_remote *nb,
278 struct lustre_handle *lh, int mode);
279 void tgt_brw_unlock(struct obd_ioobj *obj, struct niobuf_remote *niob,
280 struct lustre_handle *lh, int mode);
281 int tgt_brw_read(struct tgt_session_info *tsi);
282 int tgt_brw_write(struct tgt_session_info *tsi);
283 int tgt_hpreq_handler(struct ptlrpc_request *req);
285 extern struct tgt_handler tgt_sec_ctx_handlers[];
286 extern struct tgt_handler tgt_obd_handlers[];
287 extern struct tgt_handler tgt_dlm_handlers[];
288 extern struct tgt_handler tgt_llog_handlers[];
289 extern struct tgt_handler tgt_out_handlers[];
290 extern struct tgt_handler fld_handlers[];
291 extern struct tgt_handler seq_handlers[];
293 typedef void (*tgt_cb_t)(struct lu_target *lut, __u64 transno,
294 void *data, int err);
295 struct tgt_commit_cb {
296 tgt_cb_t tgt_cb_func;
300 int tgt_hpreq_handler(struct ptlrpc_request *req);
302 /* target/tgt_main.c */
303 void tgt_boot_epoch_update(struct lu_target *lut);
304 int tgt_last_commit_cb_add(struct thandle *th, struct lu_target *lut,
305 struct obd_export *exp, __u64 transno);
306 int tgt_new_client_cb_add(struct thandle *th, struct obd_export *exp);
307 int tgt_init(const struct lu_env *env, struct lu_target *lut,
308 struct obd_device *obd, struct dt_device *dt,
309 struct tgt_opc_slice *slice,
310 int request_fail_id, int reply_fail_id);
311 void tgt_fini(const struct lu_env *env, struct lu_target *lut);
312 int tgt_client_alloc(struct obd_export *exp);
313 void tgt_client_free(struct obd_export *exp);
314 int tgt_client_del(const struct lu_env *env, struct obd_export *exp);
315 int tgt_client_add(const struct lu_env *env, struct obd_export *exp, int);
316 int tgt_client_new(const struct lu_env *env, struct obd_export *exp);
317 int tgt_client_data_read(const struct lu_env *env, struct lu_target *tg,
318 struct lsd_client_data *lcd, loff_t *off, int index);
319 int tgt_client_data_write(const struct lu_env *env, struct lu_target *tg,
320 struct lsd_client_data *lcd, loff_t *off, struct thandle *th);
321 int tgt_server_data_read(const struct lu_env *env, struct lu_target *tg);
322 int tgt_server_data_write(const struct lu_env *env, struct lu_target *tg,
324 int tgt_server_data_update(const struct lu_env *env, struct lu_target *tg,
326 int tgt_truncate_last_rcvd(const struct lu_env *env, struct lu_target *tg,
333 static inline int err_serious(int rc)
336 return -(-rc | ESERIOUS);
339 static inline int clear_serious(int rc)
342 rc = -(-rc & ~ESERIOUS);
346 static inline int is_serious(int rc)
348 return (rc < 0 && -rc & ESERIOUS);
352 * Do not return server-side uid/gid to remote client
354 static inline void tgt_drop_id(struct obd_export *exp, struct obdo *oa)
356 if (unlikely(exp_connect_rmtclient(exp))) {
359 oa->o_valid &= ~(OBD_MD_FLUID | OBD_MD_FLGID);
364 * Unified target generic handers macros and generic functions.
366 #define TGT_RPC_HANDLER_HP(base, flags, opc, fn, hp, fmt, version) \
369 .th_fail_id = OBD_FAIL_ ## opc ## _NET, \
374 .th_version = version, \
377 #define TGT_RPC_HANDLER(base, flags, opc, fn, fmt, version) \
378 TGT_RPC_HANDLER_HP(base, flags, opc, fn, NULL, fmt, version)
380 /* MDT Request with a format known in advance */
381 #define TGT_MDT_HDL(flags, name, fn) \
382 TGT_RPC_HANDLER(MDS_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
384 /* Request with a format we do not yet know */
385 #define TGT_MDT_HDL_VAR(flags, name, fn) \
386 TGT_RPC_HANDLER(MDS_FIRST_OPC, flags, name, fn, NULL, \
389 /* OST Request with a format known in advance */
390 #define TGT_OST_HDL(flags, name, fn) \
391 TGT_RPC_HANDLER(OST_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
393 #define TGT_OST_HDL_HP(flags, name, fn, hp) \
394 TGT_RPC_HANDLER_HP(OST_FIRST_OPC, flags, name, fn, hp, \
395 &RQF_ ## name, LUSTRE_OST_VERSION)
397 /* MGS request with a format known in advance */
398 #define TGT_MGS_HDL(flags, name, fn) \
399 TGT_RPC_HANDLER(MGS_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
401 #define TGT_MGS_HDL_VAR(flags, name, fn) \
402 TGT_RPC_HANDLER(MGS_FIRST_OPC, flags, name, fn, NULL, \
406 * OBD handler macros and generic functions.
408 #define TGT_OBD_HDL(flags, name, fn) \
409 TGT_RPC_HANDLER(OBD_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
411 #define TGT_OBD_HDL_VAR(flags, name, fn) \
412 TGT_RPC_HANDLER(OBD_FIRST_OPC, flags, name, fn, NULL, \
416 * DLM handler macros and generic functions.
418 #define TGT_DLM_HDL_VAR(flags, name, fn) \
419 TGT_RPC_HANDLER(LDLM_FIRST_OPC, flags, name, fn, NULL, \
421 #define TGT_DLM_HDL(flags, name, fn) \
422 TGT_RPC_HANDLER(LDLM_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
426 * LLOG handler macros and generic functions.
428 #define TGT_LLOG_HDL_VAR(flags, name, fn) \
429 TGT_RPC_HANDLER(LLOG_FIRST_OPC, flags, name, fn, NULL, \
431 #define TGT_LLOG_HDL(flags, name, fn) \
432 TGT_RPC_HANDLER(LLOG_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
436 * Sec context handler macros and generic functions.
438 #define TGT_SEC_HDL_VAR(flags, name, fn) \
439 TGT_RPC_HANDLER(SEC_FIRST_OPC, flags, name, fn, NULL, \
442 #define TGT_QUOTA_HDL(flags, name, fn) \
443 TGT_RPC_HANDLER(QUOTA_DQACQ, flags, name, fn, &RQF_ ## name, \
446 /* Sequence service handlers */
447 #define TGT_SEQ_HDL(flags, name, fn) \
448 TGT_RPC_HANDLER(SEQ_QUERY, flags, name, fn, &RQF_ ## name, \
451 /* FID Location Database handlers */
452 #define TGT_FLD_HDL_VAR(flags, name, fn) \
453 TGT_RPC_HANDLER(FLD_QUERY, flags, name, fn, NULL, \
456 /* Request with a format known in advance */
457 #define TGT_UPDATE_HDL(flags, name, fn) \
458 TGT_RPC_HANDLER(UPDATE_OBJ, flags, name, fn, &RQF_ ## name, \
461 #endif /* __LUSTRE_LU_TARGET_H */