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, 2013, 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"
39 int tgt_init(const struct lu_env *env, struct lu_target *lut,
40 struct obd_device *obd, struct dt_device *dt,
41 struct tgt_opc_slice *slice, int request_fail_id,
44 struct dt_object_format dof;
56 lut->lut_last_rcvd = NULL;
57 lut->lut_client_bitmap = NULL;
58 obd->u.obt.obt_lut = lut;
59 obd->u.obt.obt_magic = OBT_MAGIC;
61 /* set request handler slice and parameters */
62 lut->lut_slice = slice;
63 lut->lut_reply_fail_id = reply_fail_id;
64 lut->lut_request_fail_id = request_fail_id;
66 /* sptlrcp variables init */
67 rwlock_init(&lut->lut_sptlrpc_lock);
68 sptlrpc_rule_set_init(&lut->lut_sptlrpc_rset);
69 lut->lut_mds_capa = 1;
70 lut->lut_oss_capa = 1;
72 spin_lock_init(&lut->lut_flags_lock);
73 lut->lut_sync_lock_cancel = NEVER_SYNC_ON_CANCEL;
75 /* last_rcvd initialization is needed by replayable targets only */
76 if (!obd->obd_replayable)
79 spin_lock_init(&lut->lut_translock);
81 OBD_ALLOC(lut->lut_client_bitmap, LR_MAX_CLIENTS >> 3);
82 if (lut->lut_client_bitmap == NULL)
85 memset(&attr, 0, sizeof(attr));
86 attr.la_valid = LA_MODE;
87 attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
88 dof.dof_type = dt_mode_to_dft(S_IFREG);
90 lu_local_obj_fid(&fid, LAST_RECV_OID);
92 o = dt_find_or_create(env, lut->lut_bottom, &fid, &dof, &attr);
95 CERROR("%s: cannot open LAST_RCVD: rc = %d\n", tgt_name(lut),
100 lut->lut_last_rcvd = o;
101 rc = tgt_server_data_init(env, lut);
105 /* prepare transactions callbacks */
106 lut->lut_txn_cb.dtc_txn_start = tgt_txn_start_cb;
107 lut->lut_txn_cb.dtc_txn_stop = tgt_txn_stop_cb;
108 lut->lut_txn_cb.dtc_txn_commit = NULL;
109 lut->lut_txn_cb.dtc_cookie = lut;
110 lut->lut_txn_cb.dtc_tag = LCT_DT_THREAD | LCT_MD_THREAD;
111 CFS_INIT_LIST_HEAD(&lut->lut_txn_cb.dtc_linkage);
113 dt_txn_callback_add(lut->lut_bottom, &lut->lut_txn_cb);
117 lu_object_put(env, &lut->lut_last_rcvd->do_lu);
118 lut->lut_last_rcvd = NULL;
120 OBD_FREE(lut->lut_client_bitmap, LR_MAX_CLIENTS >> 3);
121 lut->lut_client_bitmap = NULL;
124 EXPORT_SYMBOL(tgt_init);
126 void tgt_fini(const struct lu_env *env, struct lu_target *lut)
130 sptlrpc_rule_set_free(&lut->lut_sptlrpc_rset);
132 if (lut->lut_client_bitmap) {
133 OBD_FREE(lut->lut_client_bitmap, LR_MAX_CLIENTS >> 3);
134 lut->lut_client_bitmap = NULL;
136 if (lut->lut_last_rcvd) {
137 dt_txn_callback_del(lut->lut_bottom, &lut->lut_txn_cb);
138 lu_object_put(env, &lut->lut_last_rcvd->do_lu);
139 lut->lut_last_rcvd = NULL;
143 EXPORT_SYMBOL(tgt_fini);
145 /* context key constructor/destructor: tg_key_init, tg_key_fini */
146 LU_KEY_INIT(tgt, struct tgt_thread_info);
148 static void tgt_key_fini(const struct lu_context *ctx,
149 struct lu_context_key *key, void *data)
151 struct tgt_thread_info *info = data;
152 struct thandle_exec_args *args = &info->tti_tea;
155 for (i = 0; i < args->ta_alloc_args; i++) {
156 if (args->ta_args[i] != NULL)
157 OBD_FREE_PTR(args->ta_args[i]);
160 if (args->ta_args != NULL)
161 OBD_FREE(args->ta_args, sizeof(args->ta_args[0]) *
162 args->ta_alloc_args);
166 static void tgt_key_exit(const struct lu_context *ctx,
167 struct lu_context_key *key, void *data)
169 struct tgt_thread_info *tti = data;
171 tti->tti_has_trans = 0;
172 tti->tti_mult_trans = 0;
175 /* context key: tg_thread_key */
176 struct lu_context_key tgt_thread_key = {
177 .lct_tags = LCT_MD_THREAD | LCT_DT_THREAD,
178 .lct_init = tgt_key_init,
179 .lct_fini = tgt_key_fini,
180 .lct_exit = tgt_key_exit,
182 EXPORT_SYMBOL(tgt_thread_key);
184 LU_KEY_INIT_GENERIC(tgt);
186 /* context key constructor/destructor: tgt_ses_key_init, tgt_ses_key_fini */
187 LU_KEY_INIT_FINI(tgt_ses, struct tgt_session_info);
189 /* context key: tgt_session_key */
190 struct lu_context_key tgt_session_key = {
191 .lct_tags = LCT_SERVER_SESSION,
192 .lct_init = tgt_ses_key_init,
193 .lct_fini = tgt_ses_key_fini,
195 EXPORT_SYMBOL(tgt_session_key);
197 LU_KEY_INIT_GENERIC(tgt_ses);
200 * this page is allocated statically when module is initializing
201 * it is used to simulate data corruptions, see ost_checksum_bulk()
202 * for details. as the original pages provided by the layers below
203 * can be remain in the internal cache, we do not want to modify
206 struct page *tgt_page_to_corrupt;
208 int tgt_mod_init(void)
212 tgt_page_to_corrupt = alloc_page(GFP_IOFS);
214 tgt_key_init_generic(&tgt_thread_key, NULL);
215 lu_context_key_register_many(&tgt_thread_key, NULL);
217 tgt_ses_key_init_generic(&tgt_session_key, NULL);
218 lu_context_key_register_many(&tgt_session_key, NULL);
223 void tgt_mod_exit(void)
225 if (tgt_page_to_corrupt != NULL)
226 page_cache_release(tgt_page_to_corrupt);
228 lu_context_key_degister(&tgt_thread_key);
229 lu_context_key_degister(&tgt_session_key);