xref: /titanic_44/usr/src/uts/common/ktli/t_kfree.c (revision 18c2aff776a775d34a4c9893a4c72e0434d68e36)
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, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
28 /*	  All Rights Reserved  	*/
29 
30 /*
31  * University Copyright- Copyright (c) 1982, 1986, 1988
32  * The Regents of the University of California
33  * All Rights Reserved
34  *
35  * University Acknowledgment- Portions of this document are derived from
36  * software developed by the University of California, Berkeley, and its
37  * contributors.
38  */
39 
40 #pragma ident	"%Z%%M%	%I%	%E% SMI"
41 
42 /*
43  * Free the specified kernel tli data structure.
44  *
45  * Returns:
46  * 	0 on success or
47  * 	positive error code.
48  */
49 
50 #include <sys/param.h>
51 #include <sys/types.h>
52 #include <sys/user.h>
53 #include <sys/stream.h>
54 #include <sys/ioctl.h>
55 #include <sys/file.h>
56 #include <sys/stropts.h>
57 #include <sys/tihdr.h>
58 #include <sys/timod.h>
59 #include <sys/tiuser.h>
60 #include <sys/errno.h>
61 #include <sys/t_kuser.h>
62 #include <sys/kmem.h>
63 
64 
65 /*ARGSUSED*/
66 int
67 t_kfree(TIUSER *tiptr, char *ptr, int struct_type)
68 {
69 	union structptrs {
70 		struct t_bind		*bind;
71 		struct t_call		*call;
72 		struct t_discon		*dis;
73 		struct t_optmgmt	*opt;
74 		struct t_kunitdata	*udata;
75 		struct t_uderr		*uderr;
76 	} p;
77 	int error = 0;
78 
79 	/*
80 	 * Free all the buffers associated with the appropriate
81 	 * fields of each structure.
82 	 */
83 
84 	switch (struct_type) {
85 	case T_BIND:
86 		/* LINTED pointer alignment */
87 		p.bind = (struct t_bind *)ptr;
88 		if (p.bind->addr.buf != NULL)
89 			kmem_free(p.bind->addr.buf, p.bind->addr.maxlen);
90 		kmem_free(ptr, sizeof (struct t_bind));
91 		break;
92 
93 	case T_CALL:
94 		/* LINTED pointer alignment */
95 		p.call = (struct t_call *)ptr;
96 		if (p.call->addr.buf != NULL)
97 			kmem_free(p.call->addr.buf, p.call->addr.maxlen);
98 		if (p.call->opt.buf != NULL)
99 			kmem_free(p.call->opt.buf, p.call->opt.maxlen);
100 		if (p.call->udata.buf != NULL)
101 			kmem_free(p.call->udata.buf, p.call->udata.maxlen);
102 		kmem_free(ptr, sizeof (struct t_call));
103 		break;
104 
105 	case T_OPTMGMT:
106 		/* LINTED pointer alignment */
107 		p.opt = (struct t_optmgmt *)ptr;
108 		if (p.opt->opt.buf != NULL)
109 			kmem_free(p.opt->opt.buf, p.opt->opt.maxlen);
110 		kmem_free(ptr, sizeof (struct t_optmgmt));
111 		break;
112 
113 	case T_DIS:
114 		/* LINTED pointer alignment */
115 		p.dis = (struct t_discon *)ptr;
116 		if (p.dis->udata.buf != NULL)
117 			kmem_free(p.dis->udata.buf, p.dis->udata.maxlen);
118 		kmem_free(ptr, sizeof (struct t_discon));
119 		break;
120 
121 	case T_UNITDATA:
122 		/* LINTED pointer alignment */
123 		p.udata = (struct t_kunitdata *)ptr;
124 
125 		if (p.udata->udata.udata_mp) {
126 			KTLILOG(2, "t_kfree: freeing mblk_t %x, ",
127 			    p.udata->udata.udata_mp);
128 			KTLILOG(2, "ref %d\n",
129 			    p.udata->udata.udata_mp->b_datap->db_ref);
130 			freemsg(p.udata->udata.udata_mp);
131 		}
132 		if (p.udata->opt.buf != NULL)
133 			kmem_free(p.udata->opt.buf, p.udata->opt.maxlen);
134 		if (p.udata->addr.buf != NULL) {
135 			KTLILOG(2, "t_kfree: freeing address %x, ",
136 			    p.udata->addr.buf);
137 			KTLILOG(2, "len %d\n", p.udata->addr.maxlen);
138 			kmem_free(p.udata->addr.buf, p.udata->addr.maxlen);
139 		}
140 		KTLILOG(2, "t_kfree: freeing t_kunitdata\n", 0);
141 		kmem_free(ptr, sizeof (struct t_kunitdata));
142 		break;
143 
144 	case T_UDERROR:
145 		/* LINTED pointer alignment */
146 		p.uderr = (struct t_uderr *)ptr;
147 		if (p.uderr->addr.buf != NULL)
148 			kmem_free(p.uderr->addr.buf, p.uderr->addr.maxlen);
149 		if (p.uderr->opt.buf != NULL)
150 			kmem_free(p.uderr->opt.buf, p.uderr->opt.maxlen);
151 		kmem_free(ptr, sizeof (struct t_uderr));
152 		break;
153 
154 	case T_INFO:
155 		break;
156 
157 	default:
158 		error = EINVAL;
159 		break;
160 	}
161 
162 	return (error);
163 }
164