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comparison usr/src/cmd/iscsi/iscsitgtd/iscsi_conn.h @ 0:c9caec207d52 b86

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Initial porting based on b86
author Koji Uno <koji.uno@sun.com>
date Tue, 02 Jun 2009 18:56:50 +0900
parents
children 1a15d5aaf794
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-1:000000000000 0:c9caec207d52
1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #ifndef _TARGET_CONN_H
28 #define _TARGET_CONN_H
29
30 #pragma ident "@(#)iscsi_conn.h 1.1 06/06/20 SMI"
31
32 /*
33 * Block comment which describes the contents of this file.
34 */
35
36 #ifdef __cplusplus
37 extern "C" {
38 #endif
39
40 #include <sys/iscsi_protocol.h>
41 #include <sys/socket.h>
42 #include "queue.h"
43 #include "iscsi_sess.h"
44 #include "iscsi_cmd.h"
45
46 #define LBUFSIZE 80
47
48 #define TARGET_LOCATION "targets"
49 /*
50 * Currently I'm having some problems with network reads/write when the
51 * data size is larger than 8k. To work around this problem I set the
52 * various negotiation parameters during login to limit things to 8k.
53 */
54
55 #define NETWORK_SNDRCV 65536
56 #define NETWORK_SNDRCV_STR "65536"
57
58 typedef enum iscsi_state {
59 S1_FREE,
60 /* S2_XPT_WAIT, Not possible for target */
61 S3_XPT_UP,
62 S4_IN_LOGIN,
63 S5_LOGGED_IN,
64 S6_IN_LOGOUT,
65 S7_LOGOUT_REQUESTED,
66 S8_CLEANUP_WAIT
67 } iscsi_state_t;
68
69 typedef enum iscsi_transition {
70 T3, T4, T5, T6, T7, T8,
71 T9, T10, T11, T12, T13, T15,
72 T16, T17, T18
73 } iscsi_transition_t;
74
75 /*
76 * When grabbing mutex's make sure to grab c_mutex before c_mutex_state
77 * if you need to grab both.
78 */
79 typedef struct iscsi_conn {
80 int c_fd;
81
82 /*
83 * This is a linked list of all connections. Not just the connections
84 * associated with a particular session.
85 */
86 struct iscsi_conn *c_next,
87 *c_prev;
88
89 target_queue_t *c_mgmtq;
90
91 /*
92 * Time as reported by time(2) when this connection was started.
93 */
94 time_t c_up_at;
95
96 /*
97 * This queue is used to accept notification that incoming packets
98 * are available and command completion status from Session.
99 */
100 target_queue_t *c_dataq;
101
102 /*
103 * Messages are sent to Session, and from there onto STE, using
104 * this queue.
105 */
106 target_queue_t *c_sessq;
107
108 iscsi_sess_t *c_sess;
109
110 pthread_mutex_t c_state_mutex;
111 iscsi_state_t c_state;
112
113 /*
114 * Protected by c_mutex
115 */
116 int c_statsn;
117
118 int c_cid;
119
120 /*
121 * Pointer to data buffer used to store text messages which have
122 * the 'C' bit set. Since the text data separates name/value pairs
123 * with a '\0' strlen can't be used to determine the amount of space
124 * used so we keep the length in c_text_len;
125 */
126 char *c_text_area;
127 int c_text_len;
128 int c_text_sent;
129
130 sema_t c_datain;
131 pthread_t c_thr_id_poller,
132 c_thr_id_process;
133
134 pthread_mutex_t c_mutex;
135 iscsi_cmd_t *c_cmd_head;
136 iscsi_cmd_t *c_cmd_tail;
137
138 struct sockaddr_storage c_initiator_sockaddr;
139 struct sockaddr_storage c_target_sockaddr;
140
141 int c_num;
142
143 int c_auth_pass : 1;
144
145 int c_cmds_active;
146
147 /*
148 * A performance issue has been found when the backing store
149 * is UFS. Because of the indirect blocks used by UFS large files
150 * (many GBs in size) perform poorly. This in turn can cause the
151 * initiator to issue commands which don't complete in time. So,
152 * we'll monitor the completion times for commands if if it's
153 * increasing the command window will be reduced.
154 * The avg_sum is in nanoseconds. This will wrap once every 584
155 * years.
156 */
157 uint64_t c_cmds_avg_cnt;
158 hrtime_t c_cmds_avg_sum;
159
160 /*
161 * During an orderly shutdown the logout response is created when
162 * we receive the logout request. We must however wait for all I/O
163 * to complete before processing the data else we'll loose data
164 * which the initiator believes was successfully transferred.
165 * Once the STE and sessions have closed they will send a shutdown
166 * complete message. At that point the transmit side of the connection
167 * will set the state to T13 which pushes this message out.
168 * Unfortunately we need information from the Logout Request PDU
169 * to create the Logout Response PDU. Otherwise the response could
170 * be generated on the fly in the T13 state handler. By creating
171 * the response PDU and saving a pointer gives us some flexibility
172 * in the future if the final outgoing packet needs to change.
173 * Otherwise, storing that one bit of information from the request
174 * PDU might become dated.
175 */
176 iscsi_hdr_t *c_last_pkg;
177
178 /*
179 * Connection parameters
180 */
181 Boolean_t c_header_digest,
182 c_data_digest,
183 c_ifmarker,
184 c_ofmarker,
185 c_initialR2T,
186 c_immediate_data,
187 c_data_pdu_in_order,
188 c_data_sequence_in_order;
189 int c_tpgt,
190 c_maxcmdsn,
191 c_max_recv_data,
192 c_default_time_2_wait,
193 c_default_time_2_retain,
194 c_erl,
195 c_max_burst_len,
196 c_first_burst_len,
197 c_max_outstanding_r2t,
198 c_max_connections;
199 char *c_targ_alias,
200 *auth_text;
201 int auth_text_length;
202
203 } iscsi_conn_t;
204
205 void *conn_process(void *v);
206 void conn_state(iscsi_conn_t *c, iscsi_transition_t t);
207 void send_iscsi_pkt(iscsi_conn_t *c, iscsi_hdr_t *h, char *opt_text);
208 int read_retry(int fd, char *buf, int count);
209 void iscsi_inventory_change(char *targ_name);
210 void iscsi_capacity_change(char *targ_name, int lun);
211
212 #ifdef __cplusplus
213 }
214 #endif
215
216 #endif /* _TARGET_CONN_H */