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iscsi_target_nodeattrib.c
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1 /*******************************************************************************
2  * This file contains the main functions related to Initiator Node Attributes.
3  *
4  * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
5  *
6  * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
7  *
8  * Author: Nicholas A. Bellinger <[email protected]>
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or
13  * (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18  * GNU General Public License for more details.
19  ******************************************************************************/
20 
21 #include <target/target_core_base.h>
22 
23 #include "iscsi_target_core.h"
24 #include "iscsi_target_device.h"
25 #include "iscsi_target_tpg.h"
26 #include "iscsi_target_util.h"
27 #include "iscsi_target_nodeattrib.h"
28 
29 static inline char *iscsit_na_get_initiatorname(
30  struct iscsi_node_acl *nacl)
31 {
32  struct se_node_acl *se_nacl = &nacl->se_node_acl;
33 
34  return &se_nacl->initiatorname[0];
35 }
36 
37 void iscsit_set_default_node_attribues(
38  struct iscsi_node_acl *acl)
39 {
40  struct iscsi_node_attrib *a = &acl->node_attrib;
41 
42  a->dataout_timeout = NA_DATAOUT_TIMEOUT;
43  a->dataout_timeout_retries = NA_DATAOUT_TIMEOUT_RETRIES;
44  a->nopin_timeout = NA_NOPIN_TIMEOUT;
45  a->nopin_response_timeout = NA_NOPIN_RESPONSE_TIMEOUT;
46  a->random_datain_pdu_offsets = NA_RANDOM_DATAIN_PDU_OFFSETS;
47  a->random_datain_seq_offsets = NA_RANDOM_DATAIN_SEQ_OFFSETS;
48  a->random_r2t_offsets = NA_RANDOM_R2T_OFFSETS;
49  a->default_erl = NA_DEFAULT_ERL;
50 }
51 
52 int iscsit_na_dataout_timeout(
53  struct iscsi_node_acl *acl,
54  u32 dataout_timeout)
55 {
56  struct iscsi_node_attrib *a = &acl->node_attrib;
57 
58  if (dataout_timeout > NA_DATAOUT_TIMEOUT_MAX) {
59  pr_err("Requested DataOut Timeout %u larger than"
60  " maximum %u\n", dataout_timeout,
61  NA_DATAOUT_TIMEOUT_MAX);
62  return -EINVAL;
63  } else if (dataout_timeout < NA_DATAOUT_TIMEOUT_MIX) {
64  pr_err("Requested DataOut Timeout %u smaller than"
65  " minimum %u\n", dataout_timeout,
66  NA_DATAOUT_TIMEOUT_MIX);
67  return -EINVAL;
68  }
69 
70  a->dataout_timeout = dataout_timeout;
71  pr_debug("Set DataOut Timeout to %u for Initiator Node"
72  " %s\n", a->dataout_timeout, iscsit_na_get_initiatorname(acl));
73 
74  return 0;
75 }
76 
77 int iscsit_na_dataout_timeout_retries(
78  struct iscsi_node_acl *acl,
79  u32 dataout_timeout_retries)
80 {
81  struct iscsi_node_attrib *a = &acl->node_attrib;
82 
83  if (dataout_timeout_retries > NA_DATAOUT_TIMEOUT_RETRIES_MAX) {
84  pr_err("Requested DataOut Timeout Retries %u larger"
85  " than maximum %u", dataout_timeout_retries,
86  NA_DATAOUT_TIMEOUT_RETRIES_MAX);
87  return -EINVAL;
88  } else if (dataout_timeout_retries < NA_DATAOUT_TIMEOUT_RETRIES_MIN) {
89  pr_err("Requested DataOut Timeout Retries %u smaller"
90  " than minimum %u", dataout_timeout_retries,
91  NA_DATAOUT_TIMEOUT_RETRIES_MIN);
92  return -EINVAL;
93  }
94 
95  a->dataout_timeout_retries = dataout_timeout_retries;
96  pr_debug("Set DataOut Timeout Retries to %u for"
97  " Initiator Node %s\n", a->dataout_timeout_retries,
98  iscsit_na_get_initiatorname(acl));
99 
100  return 0;
101 }
102 
103 int iscsit_na_nopin_timeout(
104  struct iscsi_node_acl *acl,
105  u32 nopin_timeout)
106 {
107  struct iscsi_node_attrib *a = &acl->node_attrib;
108  struct iscsi_session *sess;
109  struct iscsi_conn *conn;
110  struct se_node_acl *se_nacl = &a->nacl->se_node_acl;
111  struct se_session *se_sess;
112  u32 orig_nopin_timeout = a->nopin_timeout;
113 
114  if (nopin_timeout > NA_NOPIN_TIMEOUT_MAX) {
115  pr_err("Requested NopIn Timeout %u larger than maximum"
116  " %u\n", nopin_timeout, NA_NOPIN_TIMEOUT_MAX);
117  return -EINVAL;
118  } else if ((nopin_timeout < NA_NOPIN_TIMEOUT_MIN) &&
119  (nopin_timeout != 0)) {
120  pr_err("Requested NopIn Timeout %u smaller than"
121  " minimum %u and not 0\n", nopin_timeout,
122  NA_NOPIN_TIMEOUT_MIN);
123  return -EINVAL;
124  }
125 
126  a->nopin_timeout = nopin_timeout;
127  pr_debug("Set NopIn Timeout to %u for Initiator"
128  " Node %s\n", a->nopin_timeout,
129  iscsit_na_get_initiatorname(acl));
130  /*
131  * Reenable disabled nopin_timeout timer for all iSCSI connections.
132  */
133  if (!orig_nopin_timeout) {
134  spin_lock_bh(&se_nacl->nacl_sess_lock);
135  se_sess = se_nacl->nacl_sess;
136  if (se_sess) {
137  sess = se_sess->fabric_sess_ptr;
138 
139  spin_lock(&sess->conn_lock);
140  list_for_each_entry(conn, &sess->sess_conn_list,
141  conn_list) {
142  if (conn->conn_state !=
143  TARG_CONN_STATE_LOGGED_IN)
144  continue;
145 
146  spin_lock(&conn->nopin_timer_lock);
147  __iscsit_start_nopin_timer(conn);
148  spin_unlock(&conn->nopin_timer_lock);
149  }
150  spin_unlock(&sess->conn_lock);
151  }
152  spin_unlock_bh(&se_nacl->nacl_sess_lock);
153  }
154 
155  return 0;
156 }
157 
158 int iscsit_na_nopin_response_timeout(
159  struct iscsi_node_acl *acl,
160  u32 nopin_response_timeout)
161 {
162  struct iscsi_node_attrib *a = &acl->node_attrib;
163 
164  if (nopin_response_timeout > NA_NOPIN_RESPONSE_TIMEOUT_MAX) {
165  pr_err("Requested NopIn Response Timeout %u larger"
166  " than maximum %u\n", nopin_response_timeout,
167  NA_NOPIN_RESPONSE_TIMEOUT_MAX);
168  return -EINVAL;
169  } else if (nopin_response_timeout < NA_NOPIN_RESPONSE_TIMEOUT_MIN) {
170  pr_err("Requested NopIn Response Timeout %u smaller"
171  " than minimum %u\n", nopin_response_timeout,
172  NA_NOPIN_RESPONSE_TIMEOUT_MIN);
173  return -EINVAL;
174  }
175 
176  a->nopin_response_timeout = nopin_response_timeout;
177  pr_debug("Set NopIn Response Timeout to %u for"
178  " Initiator Node %s\n", a->nopin_timeout,
179  iscsit_na_get_initiatorname(acl));
180 
181  return 0;
182 }
183 
184 int iscsit_na_random_datain_pdu_offsets(
185  struct iscsi_node_acl *acl,
186  u32 random_datain_pdu_offsets)
187 {
188  struct iscsi_node_attrib *a = &acl->node_attrib;
189 
190  if (random_datain_pdu_offsets != 0 && random_datain_pdu_offsets != 1) {
191  pr_err("Requested Random DataIN PDU Offsets: %u not"
192  " 0 or 1\n", random_datain_pdu_offsets);
193  return -EINVAL;
194  }
195 
196  a->random_datain_pdu_offsets = random_datain_pdu_offsets;
197  pr_debug("Set Random DataIN PDU Offsets to %u for"
198  " Initiator Node %s\n", a->random_datain_pdu_offsets,
199  iscsit_na_get_initiatorname(acl));
200 
201  return 0;
202 }
203 
204 int iscsit_na_random_datain_seq_offsets(
205  struct iscsi_node_acl *acl,
206  u32 random_datain_seq_offsets)
207 {
208  struct iscsi_node_attrib *a = &acl->node_attrib;
209 
210  if (random_datain_seq_offsets != 0 && random_datain_seq_offsets != 1) {
211  pr_err("Requested Random DataIN Sequence Offsets: %u"
212  " not 0 or 1\n", random_datain_seq_offsets);
213  return -EINVAL;
214  }
215 
216  a->random_datain_seq_offsets = random_datain_seq_offsets;
217  pr_debug("Set Random DataIN Sequence Offsets to %u for"
218  " Initiator Node %s\n", a->random_datain_seq_offsets,
219  iscsit_na_get_initiatorname(acl));
220 
221  return 0;
222 }
223 
224 int iscsit_na_random_r2t_offsets(
225  struct iscsi_node_acl *acl,
226  u32 random_r2t_offsets)
227 {
228  struct iscsi_node_attrib *a = &acl->node_attrib;
229 
230  if (random_r2t_offsets != 0 && random_r2t_offsets != 1) {
231  pr_err("Requested Random R2T Offsets: %u not"
232  " 0 or 1\n", random_r2t_offsets);
233  return -EINVAL;
234  }
235 
236  a->random_r2t_offsets = random_r2t_offsets;
237  pr_debug("Set Random R2T Offsets to %u for"
238  " Initiator Node %s\n", a->random_r2t_offsets,
239  iscsit_na_get_initiatorname(acl));
240 
241  return 0;
242 }
243 
244 int iscsit_na_default_erl(
245  struct iscsi_node_acl *acl,
246  u32 default_erl)
247 {
248  struct iscsi_node_attrib *a = &acl->node_attrib;
249 
250  if (default_erl != 0 && default_erl != 1 && default_erl != 2) {
251  pr_err("Requested default ERL: %u not 0, 1, or 2\n",
252  default_erl);
253  return -EINVAL;
254  }
255 
256  a->default_erl = default_erl;
257  pr_debug("Set use ERL0 flag to %u for Initiator"
258  " Node %s\n", a->default_erl,
259  iscsit_na_get_initiatorname(acl));
260 
261  return 0;
262 }
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