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 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26
27 /*
28 * Blacklist special file
29 */
30
31 #include <sys/types.h>
32 #include <sys/conf.h>
33 #include <sys/stat.h>
34 #include <sys/modctl.h>
35 #include <sys/kmem.h>
36 #include <sys/ddi.h>
37 #include <sys/sunddi.h>
38 #include <sys/open.h>
39 #include <sys/policy.h>
40 #include <sys/fm/protocol.h>
41 #include <sys/bl.h>
42
43 static dev_info_t *bl_dip; /* private copy of devinfo pointer */
44
45 static int
46 bl_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
47 {
48 switch (cmd) {
49 case DDI_ATTACH:
50 break;
51 case DDI_RESUME:
52 return (DDI_SUCCESS);
53 default:
54 return (DDI_FAILURE);
55 }
56
57 if (ddi_create_minor_node(dip, ddi_get_name(dip), S_IFCHR,
58 ddi_get_instance(dip), DDI_PSEUDO, 0) != DDI_SUCCESS)
59 return (DDI_FAILURE);
60
61 bl_dip = dip;
62 return (DDI_SUCCESS);
63 }
64
65 /*ARGSUSED*/
66 static int
67 bl_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
68 {
69 switch (cmd) {
70 case DDI_DETACH:
71 break;
72 case DDI_SUSPEND:
73 return (DDI_SUCCESS);
74 default:
75 return (DDI_FAILURE);
76 }
77
78 ddi_remove_minor_node(bl_dip, NULL);
79 return (DDI_SUCCESS);
80 }
81
82 /*ARGSUSED*/
83 static int
84 bl_getinfo(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
85 {
86 int rc = DDI_SUCCESS;
87
88 switch (infocmd) {
89 case DDI_INFO_DEVT2DEVINFO:
90 *result = bl_dip;
91 break;
92
93 case DDI_INFO_DEVT2INSTANCE:
94 *result = (void *)(uintptr_t)getminor((dev_t)arg);
95 break;
96
97 default:
98 *result = NULL;
99 rc = DDI_FAILURE;
100 }
101
102 return (rc);
103 }
104
105 /*ARGSUSED*/
106 static int
107 bl_open(dev_t *devp, int flag, int otyp, struct cred *credp)
108 {
109 if (otyp != OTYP_CHR)
110 return (EINVAL);
111
112 if (secpolicy_blacklist(credp) != 0)
113 return (EPERM);
114
115 return (0);
116 }
117
118 /*ARGSUSED*/
119 static int
120 bl_ioctl(dev_t dev, int cmd, intptr_t data, int flag, cred_t *cred, int *rvalp)
121 {
122 bl_req_t blr;
123 nvlist_t *fmri;
124 const char *scheme;
125 char class[128];
126 char *buf;
127 int err;
128
129 #ifdef _SYSCALL32
130 if (get_udatamodel() != DATAMODEL_NATIVE) {
131 bl_req32_t blr32;
132
133 if (copyin((void *)data, &blr32, sizeof (bl_req32_t)) != 0)
134 return (EFAULT);
135
136 blr.bl_fmri = (caddr_t)(uintptr_t)blr32.bl_fmri;
137 blr.bl_fmrisz = blr32.bl_fmrisz;
138
139 blr.bl_class = (caddr_t)(uintptr_t)blr32.bl_class;
140 } else
141 #endif
142 {
143 if (copyin((void *)data, &blr, sizeof (bl_req_t)) != 0)
144 return (EFAULT);
145 }
146
147 if (blr.bl_fmri == NULL || blr.bl_fmrisz > BL_FMRI_MAX_BUFSIZE ||
148 blr.bl_class == NULL)
149 return (EINVAL);
150
151 if (copyinstr(blr.bl_class, class, sizeof (class), NULL) != 0)
152 return (EFAULT);
153
154 buf = kmem_zalloc(blr.bl_fmrisz, KM_SLEEP);
155 if (copyin(blr.bl_fmri, buf, blr.bl_fmrisz) != 0) {
156 kmem_free(buf, blr.bl_fmrisz);
157 return (EFAULT);
158 }
159
160 err = nvlist_unpack(buf, blr.bl_fmrisz, &fmri, KM_SLEEP);
161 kmem_free(buf, blr.bl_fmrisz);
162 if (err != 0)
163 return (err);
164
165 if (nvlist_lookup_string(fmri, FM_FMRI_SCHEME, (char **)&scheme) != 0) {
166 nvlist_free(fmri);
167 return (EINVAL);
168 }
169
170 switch (cmd) {
171 case BLIOC_INSERT:
172 case BLIOC_DELETE:
173 err = blacklist(cmd, scheme, fmri, class);
174 break;
175 default:
176 err = ENOTSUP;
177 }
178
179 nvlist_free(fmri);
180 return (err);
181
182 }
183
184 static struct cb_ops bl_cb_ops = {
185 bl_open, /* open */
186 nulldev, /* close */
187 nodev, /* strategy */
188 nodev, /* print */
189 nodev, /* dump */
190 nodev, /* read */
191 nodev, /* write */
192 bl_ioctl, /* ioctl */
193 nodev, /* devmap */
194 nodev, /* mmap */
195 nodev, /* segmap */
196 nochpoll, /* poll */
197 ddi_prop_op, /* cb_prop_op */
198 0, /* streamtab */
199 D_NEW | D_MP | D_64BIT /* Driver compatibility flag */
200 };
201
202 static struct dev_ops bl_ops = {
203 DEVO_REV, /* devo_rev */
204 0, /* devo_refcnt */
205 bl_getinfo, /* devo_getinfo */
206 nulldev, /* devo_identify */
207 nulldev, /* devo_probe */
208 bl_attach, /* devo_attach */
209 bl_detach, /* devo_detach */
210 nodev, /* devo_reset */
211 &bl_cb_ops, /* devo_cb_ops */
212 (struct bus_ops *)0, /* devo_bus_ops */
213 NULL, /* devo_power */
214 ddi_quiesce_not_needed, /* devo_quiesce */
215 };
216
217 static struct modldrv modldrv = {
218 &mod_driverops, "blacklist driver", &bl_ops,
219 };
220
221 static struct modlinkage modlinkage = {
222 MODREV_1, &modldrv, NULL
223 };
224
225 int
226 _init(void)
227 {
228 return (mod_install(&modlinkage));
229 }
230
231 int
232 _info(struct modinfo *modinfop)
233 {
234 return (mod_info(&modlinkage, modinfop));
235 }
236
237 int
238 _fini(void)
239 {
240 return (mod_remove(&modlinkage));
241 }