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,
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13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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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.
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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;
59 spinlock_t lut_flags_lock;
60 unsigned int lut_mds_capa:1,
63 lut_sync_lock_cancel:2;
65 /* LAST_RCVD parameters */
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 * Additional fail id that can be set by handler.
111 int tsi_reply_fail_id;
112 int tsi_request_fail_id;
114 int tsi_has_trans:1; /* has txn already? */
119 static inline struct tgt_session_info *tgt_ses_info(const struct lu_env *env)
121 struct tgt_session_info *tsi;
123 LASSERT(env->le_ses != NULL);
124 tsi = lu_context_key_get(env->le_ses, &tgt_session_key);
130 * Generic unified target support.
132 enum tgt_handler_flags {
134 * struct *_body is passed in the incoming message, and object
135 * identified by this fid exists on disk.
137 * "habeo corpus" == "I have a body"
139 HABEO_CORPUS = (1 << 0),
141 * struct ldlm_request is passed in the incoming message.
143 * "habeo clavis" == "I have a key"
145 HABEO_CLAVIS = (1 << 1),
147 * this request has fixed reply format, so that reply message can be
148 * packed by generic code.
150 * "habeo refero" == "I have a reply"
152 HABEO_REFERO = (1 << 2),
154 * this request will modify something, so check whether the file system
155 * is readonly or not, then return -EROFS to client asap if necessary.
157 * "mutabor" == "I shall modify"
163 /* The name of this handler. */
165 /* Fail id, check at the beginning */
169 /* Flags in enum tgt_handler_flags */
171 /* Request version for this opcode */
173 /* Handler function */
174 int (*th_act)(struct tgt_session_info *tti);
175 /* Handler function for high priority requests */
176 int (*th_hp)(struct tgt_session_info *tti);
177 /* Request format for this request */
178 const struct req_format *th_fmt;
181 struct tgt_opc_slice {
182 __u32 tos_opc_start; /* First op code */
183 __u32 tos_opc_end; /* Last op code */
184 struct tgt_handler *tos_hs; /* Registered handler */
187 static inline struct ptlrpc_request *tgt_ses_req(struct tgt_session_info *tsi)
189 return tsi->tsi_pill ? tsi->tsi_pill->rc_req : NULL;
192 static inline __u64 tgt_conn_flags(struct tgt_session_info *tsi)
194 LASSERT(tsi->tsi_exp);
195 return exp_connect_flags(tsi->tsi_exp);
198 static inline int req_is_replay(struct ptlrpc_request *req)
200 LASSERT(req->rq_reqmsg);
201 return !!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY);
204 /* target/tgt_handler.c */
205 int tgt_request_handle(struct ptlrpc_request *req);
206 char *tgt_name(struct lu_target *tgt);
207 void tgt_counter_incr(struct obd_export *exp, int opcode);
208 int tgt_connect_check_sptlrpc(struct ptlrpc_request *req,
209 struct obd_export *exp);
210 int tgt_adapt_sptlrpc_conf(struct lu_target *tgt, int initial);
211 int tgt_connect(struct tgt_session_info *tsi);
212 int tgt_disconnect(struct tgt_session_info *uti);
213 int tgt_obd_ping(struct tgt_session_info *tsi);
214 int tgt_enqueue(struct tgt_session_info *tsi);
215 int tgt_convert(struct tgt_session_info *tsi);
216 int tgt_bl_callback(struct tgt_session_info *tsi);
217 int tgt_cp_callback(struct tgt_session_info *tsi);
218 int tgt_llog_open(struct tgt_session_info *tsi);
219 int tgt_llog_close(struct tgt_session_info *tsi);
220 int tgt_llog_destroy(struct tgt_session_info *tsi);
221 int tgt_llog_read_header(struct tgt_session_info *tsi);
222 int tgt_llog_next_block(struct tgt_session_info *tsi);
223 int tgt_llog_prev_block(struct tgt_session_info *tsi);
224 int tgt_sec_ctx_init(struct tgt_session_info *tsi);
225 int tgt_sec_ctx_init_cont(struct tgt_session_info *tsi);
226 int tgt_sec_ctx_fini(struct tgt_session_info *tsi);
227 int tgt_sendpage(struct tgt_session_info *tsi, struct lu_rdpg *rdpg, int nob);
228 int tgt_validate_obdo(struct tgt_session_info *tsi, struct obdo *oa);
229 int tgt_sync(const struct lu_env *env, struct lu_target *tgt,
230 struct dt_object *obj);
232 int tgt_io_thread_init(struct ptlrpc_thread *thread);
233 void tgt_io_thread_done(struct ptlrpc_thread *thread);
235 int tgt_extent_lock(struct ldlm_namespace *ns, struct ldlm_res_id *res_id,
236 __u64 start, __u64 end, struct lustre_handle *lh,
237 int mode, __u64 *flags);
238 void tgt_extent_unlock(struct lustre_handle *lh, ldlm_mode_t mode);
239 int tgt_brw_lock(struct ldlm_namespace *ns, struct ldlm_res_id *res_id,
240 struct obd_ioobj *obj, struct niobuf_remote *nb,
241 struct lustre_handle *lh, int mode);
242 void tgt_brw_unlock(struct obd_ioobj *obj, struct niobuf_remote *niob,
243 struct lustre_handle *lh, int mode);
244 int tgt_brw_read(struct tgt_session_info *tsi);
245 int tgt_brw_write(struct tgt_session_info *tsi);
246 int tgt_hpreq_handler(struct ptlrpc_request *req);
248 extern struct tgt_handler tgt_sec_ctx_handlers[];
249 extern struct tgt_handler tgt_obd_handlers[];
250 extern struct tgt_handler tgt_dlm_handlers[];
251 extern struct tgt_handler tgt_llog_handlers[];
252 extern struct tgt_handler tgt_out_handlers[];
253 extern struct tgt_handler fld_handlers[];
254 extern struct tgt_handler seq_handlers[];
256 typedef void (*tgt_cb_t)(struct lu_target *lut, __u64 transno,
257 void *data, int err);
258 struct tgt_commit_cb {
259 tgt_cb_t tgt_cb_func;
263 /* target/tgt_main.c */
264 void tgt_boot_epoch_update(struct lu_target *lut);
265 int tgt_last_commit_cb_add(struct thandle *th, struct lu_target *lut,
266 struct obd_export *exp, __u64 transno);
267 int tgt_new_client_cb_add(struct thandle *th, struct obd_export *exp);
268 int tgt_init(const struct lu_env *env, struct lu_target *lut,
269 struct obd_device *obd, struct dt_device *dt,
270 struct tgt_opc_slice *slice,
271 int request_fail_id, int reply_fail_id);
272 void tgt_fini(const struct lu_env *env, struct lu_target *lut);
273 int tgt_client_alloc(struct obd_export *exp);
274 void tgt_client_free(struct obd_export *exp);
275 int tgt_client_del(const struct lu_env *env, struct obd_export *exp);
276 int tgt_client_add(const struct lu_env *env, struct obd_export *exp, int);
277 int tgt_client_new(const struct lu_env *env, struct obd_export *exp);
278 int tgt_client_data_read(const struct lu_env *env, struct lu_target *tg,
279 struct lsd_client_data *lcd, loff_t *off, int index);
280 int tgt_client_data_write(const struct lu_env *env, struct lu_target *tg,
281 struct lsd_client_data *lcd, loff_t *off, struct thandle *th);
282 int tgt_server_data_read(const struct lu_env *env, struct lu_target *tg);
283 int tgt_server_data_write(const struct lu_env *env, struct lu_target *tg,
285 int tgt_server_data_update(const struct lu_env *env, struct lu_target *tg,
287 int tgt_truncate_last_rcvd(const struct lu_env *env, struct lu_target *tg,
289 int tgt_last_rcvd_update(const struct lu_env *env, struct lu_target *tgt,
290 struct dt_object *obj, __u64 opdata,
291 struct thandle *th, struct ptlrpc_request *req);
292 int tgt_last_rcvd_update_echo(const struct lu_env *env, struct lu_target *tgt,
293 struct dt_object *obj, struct thandle *th,
294 struct obd_export *exp);
300 static inline int err_serious(int rc)
303 return -(-rc | ESERIOUS);
306 static inline int clear_serious(int rc)
309 rc = -(-rc & ~ESERIOUS);
313 static inline int is_serious(int rc)
315 return (rc < 0 && -rc & ESERIOUS);
319 * Do not return server-side uid/gid to remote client
321 static inline void tgt_drop_id(struct obd_export *exp, struct obdo *oa)
323 if (unlikely(exp_connect_rmtclient(exp))) {
326 oa->o_valid &= ~(OBD_MD_FLUID | OBD_MD_FLGID);
331 * Unified target generic handers macros and generic functions.
333 #define TGT_RPC_HANDLER(base, flags, opc, fn, fmt, version) \
336 .th_fail_id = OBD_FAIL_ ## opc ## _NET, \
341 .th_version = version \
344 /* MDT Request with a format known in advance */
345 #define TGT_MDT_HDL(flags, name, fn) \
346 TGT_RPC_HANDLER(MDS_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
348 /* Request with a format we do not yet know */
349 #define TGT_MDT_HDL_VAR(flags, name, fn) \
350 TGT_RPC_HANDLER(MDS_FIRST_OPC, flags, name, fn, NULL, \
353 /* MDT Request with a format known in advance */
354 #define TGT_OST_HDL(flags, name, fn) \
355 TGT_RPC_HANDLER(OST_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
358 /* MGS request with a format known in advance */
359 #define TGT_MGS_HDL(flags, name, fn) \
360 TGT_RPC_HANDLER(MGS_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
362 #define TGT_MGS_HDL_VAR(flags, name, fn) \
363 TGT_RPC_HANDLER(MGS_FIRST_OPC, flags, name, fn, NULL, \
367 * OBD handler macros and generic functions.
369 #define TGT_OBD_HDL(flags, name, fn) \
370 TGT_RPC_HANDLER(OBD_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
372 #define TGT_OBD_HDL_VAR(flags, name, fn) \
373 TGT_RPC_HANDLER(OBD_FIRST_OPC, flags, name, fn, NULL, \
377 * DLM handler macros and generic functions.
379 #define TGT_DLM_HDL_VAR(flags, name, fn) \
380 TGT_RPC_HANDLER(LDLM_FIRST_OPC, flags, name, fn, NULL, \
382 #define TGT_DLM_HDL(flags, name, fn) \
383 TGT_RPC_HANDLER(LDLM_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
387 * LLOG handler macros and generic functions.
389 #define TGT_LLOG_HDL_VAR(flags, name, fn) \
390 TGT_RPC_HANDLER(LLOG_FIRST_OPC, flags, name, fn, NULL, \
392 #define TGT_LLOG_HDL(flags, name, fn) \
393 TGT_RPC_HANDLER(LLOG_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
397 * Sec context handler macros and generic functions.
399 #define TGT_SEC_HDL_VAR(flags, name, fn) \
400 TGT_RPC_HANDLER(SEC_FIRST_OPC, flags, name, fn, NULL, \
403 #define TGT_QUOTA_HDL(flags, name, fn) \
404 TGT_RPC_HANDLER(QUOTA_DQACQ, flags, name, fn, &RQF_ ## name, \
407 /* Sequence service handlers */
408 #define TGT_SEQ_HDL(flags, name, fn) \
409 TGT_RPC_HANDLER(SEQ_QUERY, flags, name, fn, &RQF_ ## name, \
412 /* FID Location Database handlers */
413 #define TGT_FLD_HDL(flags, name, fn) \
414 TGT_RPC_HANDLER(FLD_QUERY, flags, name, fn, &RQF_ ## name, \
417 /* Request with a format known in advance */
418 #define TGT_UPDATE_HDL(flags, name, fn) \
419 TGT_RPC_HANDLER(UPDATE_OBJ, flags, name, fn, &RQF_ ## name, \
422 #endif /* __LUSTRE_LU_TARGET_H */