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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 const struct mdt_body *tsi_mdt_body;
99 struct lu_object *tsi_corpus;
102 * Additional fail id that can be set by handler.
104 int tsi_reply_fail_id;
105 int tsi_request_fail_id;
107 __u32 tsi_has_trans:1; /* has txn already? */
110 static inline struct tgt_session_info *tgt_ses_info(const struct lu_env *env)
112 struct tgt_session_info *tsi;
114 LASSERT(env->le_ses != NULL);
115 tsi = lu_context_key_get(env->le_ses, &tgt_session_key);
121 * Generic unified target support.
123 enum tgt_handler_flags {
125 * struct *_body is passed in the incoming message, and object
126 * identified by this fid exists on disk.
128 * "habeo corpus" == "I have a body"
130 HABEO_CORPUS = (1 << 0),
132 * struct ldlm_request is passed in the incoming message.
134 * "habeo clavis" == "I have a key"
136 HABEO_CLAVIS = (1 << 1),
138 * this request has fixed reply format, so that reply message can be
139 * packed by generic code.
141 * "habeo refero" == "I have a reply"
143 HABEO_REFERO = (1 << 2),
145 * this request will modify something, so check whether the file system
146 * is readonly or not, then return -EROFS to client asap if necessary.
148 * "mutabor" == "I shall modify"
154 /* The name of this handler. */
156 /* Fail id, check at the beginning */
160 /* Flags in enum tgt_handler_flags */
162 /* Request version for this opcode */
164 /* Handler function */
165 int (*th_act)(struct tgt_session_info *tti);
166 /* Request format for this request */
167 const struct req_format *th_fmt;
170 struct tgt_opc_slice {
171 __u32 tos_opc_start; /* First op code */
172 __u32 tos_opc_end; /* Last op code */
173 struct tgt_handler *tos_hs; /* Registered handler */
176 static inline struct ptlrpc_request *tgt_ses_req(struct tgt_session_info *tsi)
178 return tsi->tsi_pill ? tsi->tsi_pill->rc_req : NULL;
181 static inline __u64 tgt_conn_flags(struct tgt_session_info *tsi)
183 LASSERT(tsi->tsi_exp);
184 return exp_connect_flags(tsi->tsi_exp);
187 static inline int req_is_replay(struct ptlrpc_request *req)
189 LASSERT(req->rq_reqmsg);
190 return !!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY);
193 /* target/tgt_handler.c */
194 int tgt_request_handle(struct ptlrpc_request *req);
195 char *tgt_name(struct lu_target *tgt);
196 void tgt_counter_incr(struct obd_export *exp, int opcode);
197 int tgt_connect_check_sptlrpc(struct ptlrpc_request *req,
198 struct obd_export *exp);
199 int tgt_connect(struct tgt_session_info *tsi);
200 int tgt_disconnect(struct tgt_session_info *uti);
201 int tgt_obd_ping(struct tgt_session_info *tsi);
202 int tgt_enqueue(struct tgt_session_info *tsi);
203 int tgt_convert(struct tgt_session_info *tsi);
204 int tgt_bl_callback(struct tgt_session_info *tsi);
205 int tgt_cp_callback(struct tgt_session_info *tsi);
206 int tgt_llog_open(struct tgt_session_info *tsi);
207 int tgt_llog_close(struct tgt_session_info *tsi);
208 int tgt_llog_destroy(struct tgt_session_info *tsi);
209 int tgt_llog_read_header(struct tgt_session_info *tsi);
210 int tgt_llog_next_block(struct tgt_session_info *tsi);
211 int tgt_llog_prev_block(struct tgt_session_info *tsi);
212 int tgt_sec_ctx_init(struct tgt_session_info *tsi);
213 int tgt_sec_ctx_init_cont(struct tgt_session_info *tsi);
214 int tgt_sec_ctx_fini(struct tgt_session_info *tsi);
215 int tgt_sendpage(struct tgt_session_info *tsi, struct lu_rdpg *rdpg, int nob);
217 extern struct tgt_handler tgt_sec_ctx_handlers[];
218 extern struct tgt_handler tgt_obd_handlers[];
219 extern struct tgt_handler tgt_dlm_handlers[];
220 extern struct tgt_handler tgt_llog_handlers[];
221 extern struct tgt_handler tgt_out_handlers[];
222 extern struct tgt_handler fld_handlers[];
223 extern struct tgt_handler seq_handlers[];
225 typedef void (*tgt_cb_t)(struct lu_target *lut, __u64 transno,
226 void *data, int err);
227 struct tgt_commit_cb {
228 tgt_cb_t tgt_cb_func;
232 /* target/tgt_main.c */
233 void tgt_boot_epoch_update(struct lu_target *lut);
234 int tgt_last_commit_cb_add(struct thandle *th, struct lu_target *lut,
235 struct obd_export *exp, __u64 transno);
236 int tgt_new_client_cb_add(struct thandle *th, struct obd_export *exp);
237 int tgt_init(const struct lu_env *env, struct lu_target *lut,
238 struct obd_device *obd, struct dt_device *dt,
239 struct tgt_opc_slice *slice,
240 int request_fail_id, int reply_fail_id);
241 void tgt_fini(const struct lu_env *env, struct lu_target *lut);
242 int tgt_client_alloc(struct obd_export *exp);
243 void tgt_client_free(struct obd_export *exp);
244 int tgt_client_del(const struct lu_env *env, struct obd_export *exp);
245 int tgt_client_add(const struct lu_env *env, struct obd_export *exp, int);
246 int tgt_client_new(const struct lu_env *env, struct obd_export *exp);
247 int tgt_client_data_read(const struct lu_env *env, struct lu_target *tg,
248 struct lsd_client_data *lcd, loff_t *off, int index);
249 int tgt_client_data_write(const struct lu_env *env, struct lu_target *tg,
250 struct lsd_client_data *lcd, loff_t *off, struct thandle *th);
251 int tgt_server_data_read(const struct lu_env *env, struct lu_target *tg);
252 int tgt_server_data_write(const struct lu_env *env, struct lu_target *tg,
254 int tgt_server_data_update(const struct lu_env *env, struct lu_target *tg,
256 int tgt_truncate_last_rcvd(const struct lu_env *env, struct lu_target *tg,
258 int tgt_last_rcvd_update(const struct lu_env *env, struct lu_target *tgt,
259 struct dt_object *obj, __u64 opdata,
260 struct thandle *th, struct ptlrpc_request *req);
265 static inline int err_serious(int rc)
268 return -(-rc | ESERIOUS);
271 static inline int clear_serious(int rc)
274 rc = -(-rc & ~ESERIOUS);
278 static inline int is_serious(int rc)
280 return (rc < 0 && -rc & ESERIOUS);
284 * Unified target generic handers macros and generic functions.
286 #define TGT_RPC_HANDLER(base, flags, opc, fn, fmt, version) \
289 .th_fail_id = OBD_FAIL_ ## opc ## _NET, \
294 .th_version = version \
297 /* MDT Request with a format known in advance */
298 #define TGT_MDT_HDL(flags, name, fn) \
299 TGT_RPC_HANDLER(MDS_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
301 /* Request with a format we do not yet know */
302 #define TGT_MDT_HDL_VAR(flags, name, fn) \
303 TGT_RPC_HANDLER(MDS_FIRST_OPC, flags, name, fn, NULL, \
306 /* MGS request with a format known in advance */
307 #define TGT_MGS_HDL(flags, name, fn) \
308 TGT_RPC_HANDLER(MGS_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
310 #define TGT_MGS_HDL_VAR(flags, name, fn) \
311 TGT_RPC_HANDLER(MGS_FIRST_OPC, flags, name, fn, NULL, \
315 * OBD handler macros and generic functions.
317 #define TGT_OBD_HDL(flags, name, fn) \
318 TGT_RPC_HANDLER(OBD_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
320 #define TGT_OBD_HDL_VAR(flags, name, fn) \
321 TGT_RPC_HANDLER(OBD_FIRST_OPC, flags, name, fn, NULL, \
325 * DLM handler macros and generic functions.
327 #define TGT_DLM_HDL_VAR(flags, name, fn) \
328 TGT_RPC_HANDLER(LDLM_FIRST_OPC, flags, name, fn, NULL, \
330 #define TGT_DLM_HDL(flags, name, fn) \
331 TGT_RPC_HANDLER(LDLM_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
335 * LLOG handler macros and generic functions.
337 #define TGT_LLOG_HDL_VAR(flags, name, fn) \
338 TGT_RPC_HANDLER(LLOG_FIRST_OPC, flags, name, fn, NULL, \
340 #define TGT_LLOG_HDL(flags, name, fn) \
341 TGT_RPC_HANDLER(LLOG_FIRST_OPC, flags, name, fn, &RQF_ ## name, \
345 * Sec context handler macros and generic functions.
347 #define TGT_SEC_HDL_VAR(flags, name, fn) \
348 TGT_RPC_HANDLER(SEC_FIRST_OPC, flags, name, fn, NULL, \
351 #define TGT_QUOTA_HDL(flags, name, fn) \
352 TGT_RPC_HANDLER(QUOTA_DQACQ, flags, name, fn, &RQF_ ## name, \
355 /* Sequence service handlers */
356 #define TGT_SEQ_HDL(flags, name, fn) \
357 TGT_RPC_HANDLER(SEQ_QUERY, flags, name, fn, &RQF_ ## name, \
360 /* FID Location Database handlers */
361 #define TGT_FLD_HDL(flags, name, fn) \
362 TGT_RPC_HANDLER(FLD_QUERY, flags, name, fn, &RQF_ ## name, \
365 /* Request with a format known in advance */
366 #define TGT_UPDATE_HDL(flags, name, fn) \
367 TGT_RPC_HANDLER(UPDATE_OBJ, flags, name, fn, &RQF_ ## name, \
370 #endif /* __LUSTRE_LU_TARGET_H */