xref: /titanic_51/usr/src/lib/libsmbfs/smb/iod_wk.c (revision 25c28e83beb90e7c80452a7c818c5e6f73a07dc8)
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 2012 Nexenta Systems, Inc.  All rights reserved.
24  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
25  * Use is subject to license terms.
26  */
27 
28 /*
29  * Functions called by the IO deamon (IOD).
30  * Here in the library to simplify testing.
31  */
32 
33 #include <errno.h>
34 #include <fcntl.h>
35 #include <stdio.h>
36 #include <string.h>
37 #include <stdlib.h>
38 #include <unistd.h>
39 #include <libintl.h>
40 
41 #include <sys/byteorder.h>
42 #include <sys/types.h>
43 #include <sys/fcntl.h>
44 #include <sys/ioctl.h>
45 #include <sys/time.h>
46 #include <sys/socket.h>
47 
48 #include <netinet/in.h>
49 #include <netinet/tcp.h>
50 #include <arpa/inet.h>
51 
52 #include <netsmb/smb.h>
53 #include <netsmb/smb_lib.h>
54 #include <netsmb/netbios.h>
55 #include <netsmb/nb_lib.h>
56 #include <netsmb/smb_dev.h>
57 
58 #include "charsets.h"
59 #include "private.h"
60 
61 /*
62  * Be the reader thread for this VC.
63  */
64 int
65 smb_iod_work(smb_ctx_t *ctx)
66 {
67 	smbioc_ssn_work_t *work = &ctx->ct_work;
68 	int	vcst, err = 0;
69 
70 	DPRINT("server: %s", ctx->ct_srvname);
71 
72 	/* Calle should have opened these */
73 	if (ctx->ct_tran_fd == -1 || ctx->ct_dev_fd == -1) {
74 		err = EINVAL;
75 		goto out;
76 	}
77 
78 	/*
79 	 * This is the reader / reconnect loop.
80 	 *
81 	 * We could start with state "idle", but
82 	 * we know someone wants a connection to
83 	 * this server, so start in "vcactive".
84 	 *
85 	 * XXX: Add some syslog calls in here?
86 	 */
87 	vcst = SMBIOD_ST_VCACTIVE;
88 
89 	for (;;) {
90 
91 		switch (vcst) {
92 		case SMBIOD_ST_IDLE:
93 			/*
94 			 * Wait for driver requests to arrive
95 			 * for this VC, then return here.
96 			 * Next state is normally RECONNECT.
97 			 */
98 			DPRINT("state: idle");
99 			if (ioctl(ctx->ct_dev_fd,
100 			    SMBIOC_IOD_IDLE, &vcst) == -1) {
101 				err = errno;
102 				DPRINT("ioc_idle: err %d", err);
103 				goto out;
104 			}
105 			continue;
106 
107 		case SMBIOD_ST_RECONNECT:
108 			DPRINT("state: reconnect");
109 			err = smb_iod_connect(ctx);
110 			if (err == 0) {
111 				vcst = SMBIOD_ST_VCACTIVE;
112 				continue;
113 			}
114 			DPRINT("_iod_connect: err %d", err);
115 			/*
116 			 * If the error was EAUTH, retry is
117 			 * not likely to succeed either, so
118 			 * just exit this thread.  The user
119 			 * will need to run smbutil to get
120 			 * a new thread with new auth info.
121 			 */
122 			if (err == EAUTH)
123 				goto out;
124 			vcst = SMBIOD_ST_RCFAILED;
125 			continue;
126 
127 		case SMBIOD_ST_RCFAILED:
128 			DPRINT("state: rcfailed");
129 			/*
130 			 * Reconnect failed.  Kill off any
131 			 * requests waiting in the driver,
132 			 * then get ready to try again.
133 			 * Next state is normally IDLE.
134 			 */
135 			if (ioctl(ctx->ct_dev_fd,
136 			    SMBIOC_IOD_RCFAIL, &vcst) == -1) {
137 				err = errno;
138 				DPRINT("ioc_rcfail: err %d", err);
139 				goto out;
140 			}
141 			continue;
142 
143 		case SMBIOD_ST_VCACTIVE:
144 			DPRINT("state: active");
145 			if (ioctl(ctx->ct_dev_fd,
146 			    SMBIOC_IOD_WORK, work) == -1) {
147 				err = errno;
148 				DPRINT("ioc_work: err %d", err);
149 				goto out;
150 			}
151 			vcst = work->wk_out_state;
152 			/*
153 			 * Go ahead and close the transport now,
154 			 * rather than wait until reconnect to
155 			 * this server.
156 			 */
157 			close(ctx->ct_tran_fd);
158 			ctx->ct_tran_fd = -1;
159 			continue;
160 
161 		case SMBIOD_ST_DEAD:
162 			DPRINT("state: dead");
163 			err = 0;
164 			goto out;
165 
166 		default:
167 			DPRINT("state: BAD(%d)", vcst);
168 			err = EFAULT;
169 			goto out;
170 		}
171 	}
172 
173 out:
174 	if (ctx->ct_tran_fd != -1) {
175 		close(ctx->ct_tran_fd);
176 		ctx->ct_tran_fd = -1;
177 	}
178 	if (ctx->ct_dev_fd != -1) {
179 		close(ctx->ct_dev_fd);
180 		ctx->ct_dev_fd = -1;
181 	}
182 
183 	return (err);
184 }
185