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, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 021110-1307, USA
24 * Copyright (c) 2012, 2014, Intel Corporation.
27 * lustre/target/tgt_main.c
29 * Lustre Unified Target main initialization code
31 * Author: Mikhail Pershin <mike.pershin@intel.com>
34 #define DEBUG_SUBSYSTEM S_CLASS
37 #include "tgt_internal.h"
38 #include "../ptlrpc/ptlrpc_internal.h"
40 int tgt_init(const struct lu_env *env, struct lu_target *lut,
41 struct obd_device *obd, struct dt_device *dt,
42 struct tgt_opc_slice *slice, int request_fail_id,
45 struct dt_object_format dof;
57 lut->lut_last_rcvd = NULL;
58 lut->lut_client_bitmap = NULL;
59 atomic_set(&lut->lut_num_clients, 0);
60 atomic_set(&lut->lut_client_generation, 0);
61 lut->lut_reply_data = NULL;
62 lut->lut_reply_bitmap = NULL;
63 obd->u.obt.obt_lut = lut;
64 obd->u.obt.obt_magic = OBT_MAGIC;
66 /* set request handler slice and parameters */
67 lut->lut_slice = slice;
68 lut->lut_reply_fail_id = reply_fail_id;
69 lut->lut_request_fail_id = request_fail_id;
71 /* sptlrcp variables init */
72 rwlock_init(&lut->lut_sptlrpc_lock);
73 sptlrpc_rule_set_init(&lut->lut_sptlrpc_rset);
75 spin_lock_init(&lut->lut_flags_lock);
76 lut->lut_sync_lock_cancel = NEVER_SYNC_ON_CANCEL;
78 /* last_rcvd initialization is needed by replayable targets only */
79 if (!obd->obd_replayable)
82 spin_lock_init(&lut->lut_translock);
84 OBD_ALLOC(lut->lut_client_bitmap, LR_MAX_CLIENTS >> 3);
85 if (lut->lut_client_bitmap == NULL)
88 memset(&attr, 0, sizeof(attr));
89 attr.la_valid = LA_MODE;
90 attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
91 dof.dof_type = dt_mode_to_dft(S_IFREG);
93 lu_local_obj_fid(&fid, LAST_RECV_OID);
95 o = dt_find_or_create(env, lut->lut_bottom, &fid, &dof, &attr);
98 CERROR("%s: cannot open LAST_RCVD: rc = %d\n", tgt_name(lut),
103 lut->lut_last_rcvd = o;
104 rc = tgt_server_data_init(env, lut);
108 /* prepare transactions callbacks */
109 lut->lut_txn_cb.dtc_txn_start = tgt_txn_start_cb;
110 lut->lut_txn_cb.dtc_txn_stop = tgt_txn_stop_cb;
111 lut->lut_txn_cb.dtc_txn_commit = NULL;
112 lut->lut_txn_cb.dtc_cookie = lut;
113 lut->lut_txn_cb.dtc_tag = LCT_DT_THREAD | LCT_MD_THREAD;
114 INIT_LIST_HEAD(&lut->lut_txn_cb.dtc_linkage);
116 dt_txn_callback_add(lut->lut_bottom, &lut->lut_txn_cb);
117 lut->lut_bottom->dd_lu_dev.ld_site->ls_tgt = lut;
119 /* reply_data is supported by MDT targets only for now */
120 if (strncmp(obd->obd_type->typ_name, LUSTRE_MDT_NAME, 3) != 0)
123 OBD_ALLOC(lut->lut_reply_bitmap,
124 LUT_REPLY_SLOTS_MAX_CHUNKS * sizeof(unsigned long *));
125 if (lut->lut_reply_bitmap == NULL)
128 memset(&attr, 0, sizeof(attr));
129 attr.la_valid = LA_MODE;
130 attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
131 dof.dof_type = dt_mode_to_dft(S_IFREG);
133 lu_local_obj_fid(&fid, REPLY_DATA_OID);
135 o = dt_find_or_create(env, lut->lut_bottom, &fid, &dof, &attr);
138 CERROR("%s: cannot open REPLY_DATA: rc = %d\n", tgt_name(lut),
142 lut->lut_reply_data = o;
144 rc = tgt_reply_data_init(env, lut);
150 if (lut->lut_last_rcvd != NULL) {
151 lu_object_put(env, &lut->lut_last_rcvd->do_lu);
152 dt_txn_callback_del(lut->lut_bottom, &lut->lut_txn_cb);
154 lut->lut_last_rcvd = NULL;
155 if (lut->lut_client_bitmap != NULL)
156 OBD_FREE(lut->lut_client_bitmap, LR_MAX_CLIENTS >> 3);
157 lut->lut_client_bitmap = NULL;
158 if (lut->lut_reply_data != NULL)
159 lu_object_put(env, &lut->lut_reply_data->do_lu);
160 lut->lut_reply_data = NULL;
161 if (lut->lut_reply_bitmap != NULL)
162 OBD_FREE(lut->lut_reply_bitmap,
163 LUT_REPLY_SLOTS_MAX_CHUNKS * sizeof(unsigned long *));
164 lut->lut_reply_bitmap = NULL;
167 EXPORT_SYMBOL(tgt_init);
169 void tgt_fini(const struct lu_env *env, struct lu_target *lut)
175 if (lut->lut_lsd.lsd_feature_incompat & OBD_INCOMPAT_MULTI_RPCS &&
176 atomic_read(&lut->lut_num_clients) == 0) {
177 /* Clear MULTI RPCS incompatibility flag that prevents previous
178 * Lustre versions to mount a target with reply_data file */
179 lut->lut_lsd.lsd_feature_incompat &= ~OBD_INCOMPAT_MULTI_RPCS;
180 rc = tgt_server_data_update(env, lut, 1);
182 CERROR("%s: unable to clear MULTI RPCS "
183 "incompatibility flag\n",
184 lut->lut_obd->obd_name);
187 sptlrpc_rule_set_free(&lut->lut_sptlrpc_rset);
189 if (lut->lut_reply_data != NULL)
190 lu_object_put(env, &lut->lut_reply_data->do_lu);
191 lut->lut_reply_data = NULL;
192 if (lut->lut_reply_bitmap != NULL) {
193 for (i = 0; i < LUT_REPLY_SLOTS_MAX_CHUNKS; i++) {
194 if (lut->lut_reply_bitmap[i] != NULL)
195 OBD_FREE(lut->lut_reply_bitmap[i],
196 BITS_TO_LONGS(LUT_REPLY_SLOTS_PER_CHUNK) *
198 lut->lut_reply_bitmap[i] = NULL;
200 OBD_FREE(lut->lut_reply_bitmap,
201 LUT_REPLY_SLOTS_MAX_CHUNKS * sizeof(unsigned long *));
203 lut->lut_reply_bitmap = NULL;
204 if (lut->lut_client_bitmap) {
205 OBD_FREE(lut->lut_client_bitmap, LR_MAX_CLIENTS >> 3);
206 lut->lut_client_bitmap = NULL;
208 if (lut->lut_last_rcvd) {
209 dt_txn_callback_del(lut->lut_bottom, &lut->lut_txn_cb);
210 lu_object_put(env, &lut->lut_last_rcvd->do_lu);
211 lut->lut_last_rcvd = NULL;
215 EXPORT_SYMBOL(tgt_fini);
217 /* context key constructor/destructor: tg_key_init, tg_key_fini */
218 LU_KEY_INIT(tgt, struct tgt_thread_info);
220 static void tgt_key_fini(const struct lu_context *ctx,
221 struct lu_context_key *key, void *data)
223 struct tgt_thread_info *info = data;
224 struct thandle_exec_args *args = &info->tti_tea;
227 for (i = 0; i < args->ta_alloc_args; i++) {
228 if (args->ta_args[i] != NULL)
229 OBD_FREE_PTR(args->ta_args[i]);
232 if (args->ta_args != NULL)
233 OBD_FREE(args->ta_args, sizeof(args->ta_args[0]) *
234 args->ta_alloc_args);
238 static void tgt_key_exit(const struct lu_context *ctx,
239 struct lu_context_key *key, void *data)
241 struct tgt_thread_info *tti = data;
243 tti->tti_has_trans = 0;
244 tti->tti_mult_trans = 0;
247 /* context key: tg_thread_key */
248 struct lu_context_key tgt_thread_key = {
249 .lct_tags = LCT_MD_THREAD | LCT_DT_THREAD,
250 .lct_init = tgt_key_init,
251 .lct_fini = tgt_key_fini,
252 .lct_exit = tgt_key_exit,
255 LU_KEY_INIT_GENERIC(tgt);
257 /* context key constructor/destructor: tgt_ses_key_init, tgt_ses_key_fini */
258 LU_KEY_INIT_FINI(tgt_ses, struct tgt_session_info);
260 /* context key: tgt_session_key */
261 struct lu_context_key tgt_session_key = {
262 .lct_tags = LCT_SERVER_SESSION,
263 .lct_init = tgt_ses_key_init,
264 .lct_fini = tgt_ses_key_fini,
266 EXPORT_SYMBOL(tgt_session_key);
268 LU_KEY_INIT_GENERIC(tgt_ses);
271 * this page is allocated statically when module is initializing
272 * it is used to simulate data corruptions, see ost_checksum_bulk()
273 * for details. as the original pages provided by the layers below
274 * can be remain in the internal cache, we do not want to modify
277 struct page *tgt_page_to_corrupt;
279 int tgt_mod_init(void)
283 tgt_page_to_corrupt = alloc_page(GFP_IOFS);
285 tgt_key_init_generic(&tgt_thread_key, NULL);
286 lu_context_key_register_many(&tgt_thread_key, NULL);
288 tgt_ses_key_init_generic(&tgt_session_key, NULL);
289 lu_context_key_register_many(&tgt_session_key, NULL);
296 void tgt_mod_exit(void)
298 if (tgt_page_to_corrupt != NULL)
299 page_cache_release(tgt_page_to_corrupt);
301 lu_context_key_degister(&tgt_thread_key);
302 lu_context_key_degister(&tgt_session_key);