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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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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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;
58 unsigned int lut_mds_capa:1,
61 /* LAST_RCVD parameters */
63 struct dt_object *lut_last_rcvd;
64 /* transaction callbacks */
65 struct dt_txn_callback lut_txn_cb;
66 /** server data in last_rcvd file */
67 struct lr_server_data lut_lsd;
68 /** Server last transaction number */
69 __u64 lut_last_transno;
70 /** Lock protecting last transaction number */
71 spinlock_t lut_translock;
72 /** Lock protecting client bitmap */
73 spinlock_t lut_client_bitmap_lock;
74 /** Bitmap of known clients */
75 unsigned long *lut_client_bitmap;
78 extern struct lu_context_key tgt_session_key;
80 struct tgt_session_info {
82 * The following members will be filled explicitly
83 * with specific data in tgt_ses_init().
85 struct req_capsule *tsi_pill;
88 * Lock request for "habeo clavis" operations.
90 struct ldlm_request *tsi_dlm_req;
92 /* although we have export in req, there are cases when it is not
93 * available, e.g. closing files upon export destroy */
94 struct obd_export *tsi_exp;
95 const struct lu_env *tsi_env;
96 struct lu_target *tsi_tgt;
98 * Additional fail id that can be set by handler.
100 int tsi_reply_fail_id;
101 int tsi_request_fail_id;
104 static inline struct tgt_session_info *tgt_ses_info(const struct lu_env *env)
106 struct tgt_session_info *tsi;
108 LASSERT(env->le_ses != NULL);
109 tsi = lu_context_key_get(env->le_ses, &tgt_session_key);
115 * Generic unified target support.
117 enum tgt_handler_flags {
119 * struct *_body is passed in the incoming message, and object
120 * identified by this fid exists on disk.
122 * "habeo corpus" == "I have a body"
124 HABEO_CORPUS = (1 << 0),
126 * struct ldlm_request is passed in the incoming message.
128 * "habeo clavis" == "I have a key"
130 HABEO_CLAVIS = (1 << 1),
132 * this request has fixed reply format, so that reply message can be
133 * packed by generic code.
135 * "habeo refero" == "I have a reply"
137 HABEO_REFERO = (1 << 2),
139 * this request will modify something, so check whether the file system
140 * is readonly or not, then return -EROFS to client asap if necessary.
142 * "mutabor" == "I shall modify"
148 /* The name of this handler. */
150 /* Fail id, check at the beginning */
154 /* Flags in enum tgt_handler_flags */
156 /* Request version for this opcode */
158 /* Handler function */
159 int (*th_act)(struct tgt_session_info *tti);
160 /* Request format for this request */
161 const struct req_format *th_fmt;
164 struct tgt_opc_slice {
165 __u32 tos_opc_start; /* First op code */
166 __u32 tos_opc_end; /* Last op code */
167 struct tgt_handler *tos_hs; /* Registered handler */
170 static inline struct ptlrpc_request *tgt_ses_req(struct tgt_session_info *tsi)
172 return tsi->tsi_pill ? tsi->tsi_pill->rc_req : NULL;
175 static inline __u64 tgt_conn_flags(struct tgt_session_info *tsi)
177 LASSERT(tsi->tsi_exp);
178 return exp_connect_flags(tsi->tsi_exp);
181 static inline int req_is_replay(struct ptlrpc_request *req)
183 LASSERT(req->rq_reqmsg);
184 return !!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY);
187 /* target/tgt_handler.c */
188 int tgt_request_handle(struct ptlrpc_request *req);
189 char *tgt_name(struct lu_target *tgt);
190 void tgt_counter_incr(struct obd_export *exp, int opcode);
191 int tgt_connect_check_sptlrpc(struct ptlrpc_request *req,
192 struct obd_export *exp);
193 int tgt_connect(struct tgt_session_info *tsi);
194 int tgt_disconnect(struct tgt_session_info *uti);
195 int tgt_obd_ping(struct tgt_session_info *tsi);
196 int tgt_enqueue(struct tgt_session_info *tsi);
197 int tgt_convert(struct tgt_session_info *tsi);
198 int tgt_bl_callback(struct tgt_session_info *tsi);
199 int tgt_cp_callback(struct tgt_session_info *tsi);
200 int tgt_llog_open(struct tgt_session_info *tsi);
201 int tgt_llog_close(struct tgt_session_info *tsi);
202 int tgt_llog_destroy(struct tgt_session_info *tsi);
203 int tgt_llog_read_header(struct tgt_session_info *tsi);
204 int tgt_llog_next_block(struct tgt_session_info *tsi);
205 int tgt_llog_prev_block(struct tgt_session_info *tsi);
206 int tgt_sec_ctx_init(struct tgt_session_info *tsi);
207 int tgt_sec_ctx_init_cont(struct tgt_session_info *tsi);
208 int tgt_sec_ctx_fini(struct tgt_session_info *tsi);
210 extern struct tgt_handler tgt_sec_ctx_handlers[];
211 extern struct tgt_handler tgt_obd_handlers[];
212 extern struct tgt_handler tgt_dlm_handlers[];
213 extern struct tgt_handler tgt_llog_handlers[];
214 extern struct tgt_handler tgt_out_handlers[];
215 extern struct tgt_handler fld_handlers[];
217 typedef void (*tgt_cb_t)(struct lu_target *lut, __u64 transno,
218 void *data, int err);
219 struct tgt_commit_cb {
220 tgt_cb_t tgt_cb_func;
224 /* target/tgt_main.c */
225 void tgt_boot_epoch_update(struct lu_target *lut);
226 int tgt_last_commit_cb_add(struct thandle *th, struct lu_target *lut,
227 struct obd_export *exp, __u64 transno);
228 int tgt_new_client_cb_add(struct thandle *th, struct obd_export *exp);
229 int tgt_init(const struct lu_env *env, struct lu_target *lut,
230 struct obd_device *obd, struct dt_device *dt,
231 struct tgt_opc_slice *slice,
232 int request_fail_id, int reply_fail_id);
233 void tgt_fini(const struct lu_env *env, struct lu_target *lut);
234 int tgt_client_alloc(struct obd_export *exp);
235 void tgt_client_free(struct obd_export *exp);
236 int tgt_client_del(const struct lu_env *env, struct obd_export *exp);
237 int tgt_client_add(const struct lu_env *env, struct obd_export *exp, int);
238 int tgt_client_new(const struct lu_env *env, struct obd_export *exp);
239 int tgt_client_data_read(const struct lu_env *env, struct lu_target *tg,
240 struct lsd_client_data *lcd, loff_t *off, int index);
241 int tgt_client_data_write(const struct lu_env *env, struct lu_target *tg,
242 struct lsd_client_data *lcd, loff_t *off, struct thandle *th);
243 int tgt_server_data_read(const struct lu_env *env, struct lu_target *tg);
244 int tgt_server_data_write(const struct lu_env *env, struct lu_target *tg,
246 int tgt_server_data_update(const struct lu_env *env, struct lu_target *tg,
248 int tgt_truncate_last_rcvd(const struct lu_env *env, struct lu_target *tg,
250 int tgt_last_rcvd_update(const struct lu_env *env, struct lu_target *tgt,
251 struct dt_object *obj, __u64 opdata,
252 struct thandle *th, struct ptlrpc_request *req);
258 static inline int err_serious(int rc)
261 return -(-rc | ESERIOUS);
264 static inline int clear_serious(int rc)
267 rc = -(-rc & ~ESERIOUS);
271 static inline int is_serious(int rc)
273 return (rc < 0 && -rc & ESERIOUS);
277 * Unified target generic handers macros and generic functions.
279 #define TGT_RPC_HANDLER(base, flags, opc, fn, fmt, version) \
282 .th_fail_id = OBD_FAIL_ ## opc ## _NET, \
287 .th_version = version \
290 /* MDT Request with a format known in advance */
291 #define TGT_MDT_HDL(flags, name, fn) \
292 TGT_RPC_HANDLER(MDS_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
294 /* Request with a format we do not yet know */
295 #define TGT_MDT_HDL_VAR(flags, name, fn) \
296 TGT_RPC_HANDLER(MDS_FIRST_OPC, flags, name, fn, NULL, \
299 /* MGS request with a format known in advance */
300 #define TGT_MGS_HDL(flags, name, fn) \
301 TGT_RPC_HANDLER(MGS_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
303 #define TGT_MGS_HDL_VAR(flags, name, fn) \
304 TGT_RPC_HANDLER(MGS_FIRST_OPC, flags, name, fn, NULL, \
308 * OBD handler macros and generic functions.
310 #define TGT_OBD_HDL(flags, name, fn) \
311 TGT_RPC_HANDLER(OBD_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
313 #define TGT_OBD_HDL_VAR(flags, name, fn) \
314 TGT_RPC_HANDLER(OBD_FIRST_OPC, flags, name, fn, NULL, \
318 * DLM handler macros and generic functions.
320 #define TGT_DLM_HDL_VAR(flags, name, fn) \
321 TGT_RPC_HANDLER(LDLM_FIRST_OPC, flags, name, fn, NULL, \
323 #define TGT_DLM_HDL(flags, name, fn) \
324 TGT_RPC_HANDLER(LDLM_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
328 * LLOG handler macros and generic functions.
330 #define TGT_LLOG_HDL_VAR(flags, name, fn) \
331 TGT_RPC_HANDLER(LLOG_FIRST_OPC, flags, name, fn, NULL, \
333 #define TGT_LLOG_HDL(flags, name, fn) \
334 TGT_RPC_HANDLER(LLOG_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
338 * Sec context handler macros and generic functions.
340 #define TGT_SEC_HDL_VAR(flags, name, fn) \
341 TGT_RPC_HANDLER(SEC_FIRST_OPC, flags, name, fn, NULL, \
344 #define TGT_QUOTA_HDL(flags, name, fn) \
345 TGT_RPC_HANDLER(QUOTA_DQACQ, flags, name, fn, &RQF_ ## name, \
348 /* Sequence service handlers */
349 #define TGT_SEQ_HDL(flags, name, fn) \
350 TGT_RPC_HANDLER(SEQ_QUERY, flags, name, fn, &RQF_ ## name, \
353 /* FID Location Database handlers */
354 #define TGT_FLD_HDL(flags, name, fn) \
355 TGT_RPC_HANDLER(FLD_QUERY, flags, name, fn, &RQF_ ## name, \
358 /* Request with a format known in advance */
359 #define TGT_UPDATE_HDL(flags, name, fn) \
360 TGT_RPC_HANDLER(UPDATE_OBJ, flags, name, fn, &RQF_ ## name, \
363 #endif /* __LUSTRE_LU_TARGET_H */