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>
44 #include <lustre_lfsck.h>
47 struct obd_device *lut_obd;
48 struct dt_device *lut_bottom;
50 /* supported opcodes and handlers for this target */
51 struct tgt_opc_slice *lut_slice;
52 __u32 lut_reply_fail_id;
53 __u32 lut_request_fail_id;
56 rwlock_t lut_sptlrpc_lock;
57 struct sptlrpc_rule_set lut_sptlrpc_rset;
58 spinlock_t lut_flags_lock;
60 unsigned int lut_mds_capa:1,
63 lut_sync_lock_cancel:2,
67 struct dt_object *lut_last_rcvd;
68 /* transaction callbacks */
69 struct dt_txn_callback lut_txn_cb;
70 /** server data in last_rcvd file */
71 struct lr_server_data lut_lsd;
72 /** Server last transaction number */
73 __u64 lut_last_transno;
74 /** Lock protecting last transaction number */
75 spinlock_t lut_translock;
76 /** Lock protecting client bitmap */
77 spinlock_t lut_client_bitmap_lock;
78 /** Bitmap of known clients */
79 unsigned long *lut_client_bitmap;
82 extern struct lu_context_key tgt_session_key;
84 struct tgt_session_info {
86 * The following members will be filled explicitly
87 * with specific data in tgt_ses_init().
89 struct req_capsule *tsi_pill;
92 * Lock request for "habeo clavis" operations.
94 struct ldlm_request *tsi_dlm_req;
96 /* although we have export in req, there are cases when it is not
97 * available, e.g. closing files upon export destroy */
98 struct obd_export *tsi_exp;
99 const struct lu_env *tsi_env;
100 struct lu_target *tsi_tgt;
102 const struct mdt_body *tsi_mdt_body;
103 struct ost_body *tsi_ost_body;
104 struct lu_object *tsi_corpus;
106 struct lu_fid tsi_fid;
107 struct ldlm_res_id tsi_resid;
109 /* object affected by VBR, for last_rcvd_update */
110 struct dt_object *tsi_vbr_obj;
111 /* opdata for mdt_reint_open(), has the same value as
112 * ldlm_reply:lock_policy_res1. The tgt_update_last_rcvd() stores
113 * this value onto disk for recovery when tgt_txn_stop_cb() is called.
118 * Additional fail id that can be set by handler.
120 int tsi_reply_fail_id;
121 bool tsi_preprocessed;
126 static inline struct tgt_session_info *tgt_ses_info(const struct lu_env *env)
128 struct tgt_session_info *tsi;
130 LASSERT(env->le_ses != NULL);
131 tsi = lu_context_key_get(env->le_ses, &tgt_session_key);
136 static inline void tgt_vbr_obj_set(const struct lu_env *env,
137 struct dt_object *obj)
139 struct tgt_session_info *tsi;
141 if (env->le_ses != NULL) {
142 tsi = tgt_ses_info(env);
143 tsi->tsi_vbr_obj = obj;
147 static inline void tgt_opdata_set(const struct lu_env *env, __u64 flags)
149 struct tgt_session_info *tsi;
151 if (env->le_ses != NULL) {
152 tsi = tgt_ses_info(env);
153 tsi->tsi_opdata |= flags;
157 static inline void tgt_opdata_clear(const struct lu_env *env, __u64 flags)
159 struct tgt_session_info *tsi;
161 if (env->le_ses != NULL) {
162 tsi = tgt_ses_info(env);
163 tsi->tsi_opdata &= ~flags;
168 * Generic unified target support.
170 enum tgt_handler_flags {
172 * struct *_body is passed in the incoming message, and object
173 * identified by this fid exists on disk.
175 * "habeo corpus" == "I have a body"
177 HABEO_CORPUS = (1 << 0),
179 * struct ldlm_request is passed in the incoming message.
181 * "habeo clavis" == "I have a key"
183 HABEO_CLAVIS = (1 << 1),
185 * this request has fixed reply format, so that reply message can be
186 * packed by generic code.
188 * "habeo refero" == "I have a reply"
190 HABEO_REFERO = (1 << 2),
192 * this request will modify something, so check whether the file system
193 * is readonly or not, then return -EROFS to client asap if necessary.
195 * "mutabor" == "I shall modify"
201 /* The name of this handler. */
203 /* Fail id, check at the beginning */
207 /* Flags in enum tgt_handler_flags */
209 /* Request version for this opcode */
211 /* Handler function */
212 int (*th_act)(struct tgt_session_info *tsi);
213 /* Handler function for high priority requests */
214 void (*th_hp)(struct tgt_session_info *tsi);
215 /* Request format for this request */
216 const struct req_format *th_fmt;
219 struct tgt_opc_slice {
220 __u32 tos_opc_start; /* First op code */
221 __u32 tos_opc_end; /* Last op code */
222 struct tgt_handler *tos_hs; /* Registered handler */
225 static inline struct ptlrpc_request *tgt_ses_req(struct tgt_session_info *tsi)
227 return tsi->tsi_pill ? tsi->tsi_pill->rc_req : NULL;
230 static inline __u64 tgt_conn_flags(struct tgt_session_info *tsi)
232 LASSERT(tsi->tsi_exp);
233 return exp_connect_flags(tsi->tsi_exp);
236 static inline int req_is_replay(struct ptlrpc_request *req)
238 LASSERT(req->rq_reqmsg);
239 return !!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY);
242 /* target/tgt_handler.c */
243 int tgt_request_handle(struct ptlrpc_request *req);
244 char *tgt_name(struct lu_target *tgt);
245 void tgt_counter_incr(struct obd_export *exp, int opcode);
246 int tgt_connect_check_sptlrpc(struct ptlrpc_request *req,
247 struct obd_export *exp);
248 int tgt_adapt_sptlrpc_conf(struct lu_target *tgt, int initial);
249 int tgt_connect(struct tgt_session_info *tsi);
250 int tgt_disconnect(struct tgt_session_info *uti);
251 int tgt_obd_ping(struct tgt_session_info *tsi);
252 int tgt_enqueue(struct tgt_session_info *tsi);
253 int tgt_convert(struct tgt_session_info *tsi);
254 int tgt_bl_callback(struct tgt_session_info *tsi);
255 int tgt_cp_callback(struct tgt_session_info *tsi);
256 int tgt_llog_open(struct tgt_session_info *tsi);
257 int tgt_llog_close(struct tgt_session_info *tsi);
258 int tgt_llog_destroy(struct tgt_session_info *tsi);
259 int tgt_llog_read_header(struct tgt_session_info *tsi);
260 int tgt_llog_next_block(struct tgt_session_info *tsi);
261 int tgt_llog_prev_block(struct tgt_session_info *tsi);
262 int tgt_sec_ctx_init(struct tgt_session_info *tsi);
263 int tgt_sec_ctx_init_cont(struct tgt_session_info *tsi);
264 int tgt_sec_ctx_fini(struct tgt_session_info *tsi);
265 int tgt_sendpage(struct tgt_session_info *tsi, struct lu_rdpg *rdpg, int nob);
266 int tgt_validate_obdo(struct tgt_session_info *tsi, struct obdo *oa);
267 int tgt_sync(const struct lu_env *env, struct lu_target *tgt,
268 struct dt_object *obj, __u64 start, __u64 end);
270 int tgt_io_thread_init(struct ptlrpc_thread *thread);
271 void tgt_io_thread_done(struct ptlrpc_thread *thread);
273 int tgt_extent_lock(struct ldlm_namespace *ns, struct ldlm_res_id *res_id,
274 __u64 start, __u64 end, struct lustre_handle *lh,
275 int mode, __u64 *flags);
276 void tgt_extent_unlock(struct lustre_handle *lh, ldlm_mode_t mode);
277 int tgt_brw_lock(struct ldlm_namespace *ns, struct ldlm_res_id *res_id,
278 struct obd_ioobj *obj, struct niobuf_remote *nb,
279 struct lustre_handle *lh, int mode);
280 void tgt_brw_unlock(struct obd_ioobj *obj, struct niobuf_remote *niob,
281 struct lustre_handle *lh, int mode);
282 int tgt_brw_read(struct tgt_session_info *tsi);
283 int tgt_brw_write(struct tgt_session_info *tsi);
284 int tgt_hpreq_handler(struct ptlrpc_request *req);
285 void tgt_register_lfsck_in_notify(int (*notify)(const struct lu_env *,
287 struct lfsck_request *));
288 void tgt_register_lfsck_query(int (*query)(const struct lu_env *,
290 struct lfsck_request *));
292 extern struct tgt_handler tgt_sec_ctx_handlers[];
293 extern struct tgt_handler tgt_lfsck_handlers[];
294 extern struct tgt_handler tgt_obd_handlers[];
295 extern struct tgt_handler tgt_dlm_handlers[];
296 extern struct tgt_handler tgt_llog_handlers[];
297 extern struct tgt_handler tgt_out_handlers[];
298 extern struct tgt_handler fld_handlers[];
299 extern struct tgt_handler seq_handlers[];
301 typedef void (*tgt_cb_t)(struct lu_target *lut, __u64 transno,
302 void *data, int err);
303 struct tgt_commit_cb {
304 tgt_cb_t tgt_cb_func;
308 int tgt_hpreq_handler(struct ptlrpc_request *req);
310 /* target/tgt_main.c */
311 void tgt_boot_epoch_update(struct lu_target *lut);
312 int tgt_last_commit_cb_add(struct thandle *th, struct lu_target *lut,
313 struct obd_export *exp, __u64 transno);
314 int tgt_new_client_cb_add(struct thandle *th, struct obd_export *exp);
315 int tgt_init(const struct lu_env *env, struct lu_target *lut,
316 struct obd_device *obd, struct dt_device *dt,
317 struct tgt_opc_slice *slice,
318 int request_fail_id, int reply_fail_id);
319 void tgt_fini(const struct lu_env *env, struct lu_target *lut);
320 int tgt_client_alloc(struct obd_export *exp);
321 void tgt_client_free(struct obd_export *exp);
322 int tgt_client_del(const struct lu_env *env, struct obd_export *exp);
323 int tgt_client_add(const struct lu_env *env, struct obd_export *exp, int);
324 int tgt_client_new(const struct lu_env *env, struct obd_export *exp);
325 int tgt_client_data_read(const struct lu_env *env, struct lu_target *tg,
326 struct lsd_client_data *lcd, loff_t *off, int index);
327 int tgt_client_data_write(const struct lu_env *env, struct lu_target *tg,
328 struct lsd_client_data *lcd, loff_t *off, struct thandle *th);
329 int tgt_server_data_read(const struct lu_env *env, struct lu_target *tg);
330 int tgt_server_data_write(const struct lu_env *env, struct lu_target *tg,
332 int tgt_server_data_update(const struct lu_env *env, struct lu_target *tg,
334 int tgt_truncate_last_rcvd(const struct lu_env *env, struct lu_target *tg,
337 /* target/out_lib.c */
338 struct dt_update_request *
339 out_find_update(struct thandle_update *tu, struct dt_device *dt_dev);
340 void out_destroy_update_req(struct dt_update_request *update);
341 struct dt_update_request *out_create_update_req(struct dt_device *dt);
342 struct dt_update_request *out_find_create_update_loc(struct thandle *th,
343 struct dt_object *dt);
344 int out_prep_update_req(const struct lu_env *env, struct obd_import *imp,
345 const struct object_update_request *ureq,
346 struct ptlrpc_request **reqp);
347 int out_remote_sync(const struct lu_env *env, struct obd_import *imp,
348 struct dt_update_request *update,
349 struct ptlrpc_request **reqp);
350 int out_insert_update(const struct lu_env *env,
351 struct dt_update_request *update,
352 int op, const struct lu_fid *fid, int count,
353 int *lens, const char **bufs);
359 static inline int err_serious(int rc)
362 return -(-rc | ESERIOUS);
365 static inline int clear_serious(int rc)
368 rc = -(-rc & ~ESERIOUS);
372 static inline int is_serious(int rc)
374 return (rc < 0 && -rc & ESERIOUS);
378 * Do not return server-side uid/gid to remote client
380 static inline void tgt_drop_id(struct obd_export *exp, struct obdo *oa)
382 if (unlikely(exp_connect_rmtclient(exp))) {
385 oa->o_valid &= ~(OBD_MD_FLUID | OBD_MD_FLGID);
390 * Unified target generic handers macros and generic functions.
392 #define TGT_RPC_HANDLER_HP(base, flags, opc, fn, hp, fmt, version) \
395 .th_fail_id = OBD_FAIL_ ## opc ## _NET, \
400 .th_version = version, \
403 #define TGT_RPC_HANDLER(base, flags, opc, fn, fmt, version) \
404 TGT_RPC_HANDLER_HP(base, flags, opc, fn, NULL, fmt, version)
406 /* MDT Request with a format known in advance */
407 #define TGT_MDT_HDL(flags, name, fn) \
408 TGT_RPC_HANDLER(MDS_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
410 /* Request with a format we do not yet know */
411 #define TGT_MDT_HDL_VAR(flags, name, fn) \
412 TGT_RPC_HANDLER(MDS_FIRST_OPC, flags, name, fn, NULL, \
415 /* OST Request with a format known in advance */
416 #define TGT_OST_HDL(flags, name, fn) \
417 TGT_RPC_HANDLER(OST_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
419 #define TGT_OST_HDL_HP(flags, name, fn, hp) \
420 TGT_RPC_HANDLER_HP(OST_FIRST_OPC, flags, name, fn, hp, \
421 &RQF_ ## name, LUSTRE_OST_VERSION)
423 /* MGS request with a format known in advance */
424 #define TGT_MGS_HDL(flags, name, fn) \
425 TGT_RPC_HANDLER(MGS_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
427 #define TGT_MGS_HDL_VAR(flags, name, fn) \
428 TGT_RPC_HANDLER(MGS_FIRST_OPC, flags, name, fn, NULL, \
432 * OBD handler macros and generic functions.
434 #define TGT_OBD_HDL(flags, name, fn) \
435 TGT_RPC_HANDLER(OBD_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
437 #define TGT_OBD_HDL_VAR(flags, name, fn) \
438 TGT_RPC_HANDLER(OBD_FIRST_OPC, flags, name, fn, NULL, \
442 * DLM handler macros and generic functions.
444 #define TGT_DLM_HDL_VAR(flags, name, fn) \
445 TGT_RPC_HANDLER(LDLM_FIRST_OPC, flags, name, fn, NULL, \
447 #define TGT_DLM_HDL(flags, name, fn) \
448 TGT_RPC_HANDLER(LDLM_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
452 * LLOG handler macros and generic functions.
454 #define TGT_LLOG_HDL_VAR(flags, name, fn) \
455 TGT_RPC_HANDLER(LLOG_FIRST_OPC, flags, name, fn, NULL, \
457 #define TGT_LLOG_HDL(flags, name, fn) \
458 TGT_RPC_HANDLER(LLOG_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
462 * Sec context handler macros and generic functions.
464 #define TGT_SEC_HDL_VAR(flags, name, fn) \
465 TGT_RPC_HANDLER(SEC_FIRST_OPC, flags, name, fn, NULL, \
468 #define TGT_QUOTA_HDL(flags, name, fn) \
469 TGT_RPC_HANDLER(QUOTA_DQACQ, flags, name, fn, &RQF_ ## name, \
472 /* Sequence service handlers */
473 #define TGT_SEQ_HDL(flags, name, fn) \
474 TGT_RPC_HANDLER(SEQ_QUERY, flags, name, fn, &RQF_ ## name, \
477 /* FID Location Database handlers */
478 #define TGT_FLD_HDL_VAR(flags, name, fn) \
479 TGT_RPC_HANDLER(FLD_QUERY, flags, name, fn, NULL, \
483 #define TGT_LFSCK_HDL(flags, name, fn) \
484 TGT_RPC_HANDLER(LFSCK_FIRST_OPC, flags, name, fn, \
485 &RQF_ ## name, LUSTRE_OBD_VERSION)
487 /* Request with a format known in advance */
488 #define TGT_UPDATE_HDL(flags, name, fn) \
489 TGT_RPC_HANDLER(OUT_UPDATE, flags, name, fn, &RQF_ ## name, \
492 #endif /* __LUSTRE_LU_TARGET_H */