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      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 }
    242