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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 /*
     23  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     28 
     29 /*
     30  * Device allocation related work.
     31  */
     32 
     33 #include <stdio.h>
     34 #include <stdlib.h>
     35 #include <errno.h>
     36 #include <string.h>
     37 #include <strings.h>
     38 #include <unistd.h>
     39 #include <fcntl.h>
     40 #include <sys/types.h>
     41 #include <sys/stat.h>
     42 #include <sys/dkio.h>
     43 #include <sys/wait.h>
     44 #include <bsm/devalloc.h>
     45 
     46 #define	DEALLOCATE	 "/usr/sbin/deallocate"
     47 #define	MKDEVALLOC	"/usr/sbin/mkdevalloc"
     48 
     49 static void _update_dev(deventry_t *, int, char *);
     50 static int _make_db();
     51 
     52 
     53 /*
     54  * _da_check_for_usb
     55  *	returns 1 if device pointed by 'link' is a removable hotplugged disk,
     56  *	else returns 0.
     57  */
     58 int
     59 _da_check_for_usb(char *link, char *root_dir)
     60 {
     61 	int		fd = -1;
     62 	int		len, dstsize;
     63 	int		removable = 0;
     64 	int		hotpluggable = 0;
     65 	char		*p = NULL;
     66 	char		path[MAXPATHLEN + 4];
     67 	char		rpath[MAXPATHLEN + 4];		/* for ",raw" */
     68 
     69 	dstsize = sizeof (path);
     70 	if (strcmp(root_dir, "") != 0) {
     71 		if (strlcat(path, root_dir, dstsize) >= dstsize)
     72 			return (0);
     73 		len = strlen(path);
     74 	} else {
     75 		len = 0;
     76 	}
     77 	(void) snprintf(path, dstsize - len, "%s", link);
     78 	if ((p = realpath(path, rpath)) == NULL) {
     79 		p = path;
     80 	} else {
     81 		if (strstr(link, "rdsk")) {
     82 			p = rpath;
     83 		} else {
     84 			(void) snprintf(path, dstsize, "%s%s", rpath, ",raw");
     85 			p = path;
     86 		}
     87 	}
     88 	if ((fd = open(p, O_RDONLY | O_NONBLOCK)) < 0)
     89 		return (0);
     90 	(void) ioctl(fd, DKIOCREMOVABLE, &removable);
     91 	(void) ioctl(fd, DKIOCHOTPLUGGABLE, &hotpluggable);
     92 	(void) close(fd);
     93 
     94 	if (removable && hotpluggable)
     95 		return (1);
     96 
     97 	return (0);
     98 }
     99 
    100 /*
    101  * _reset_devalloc
    102  *	If device allocation is being turned on, creates device_allocate
    103  *	device_maps if they do not exist.
    104  *	Puts DEVICE_ALLOCATION=ON/OFF in device_allocate to indicate if
    105  *	device allocation is on/off.
    106  */
    107 void
    108 _reset_devalloc(int action)
    109 {
    110 	da_args	dargs;
    111 
    112 	if (action == DA_ON)
    113 		(void) _make_db();
    114 	else if ((action == DA_OFF) && (open(DEVALLOC, O_RDONLY) == -1))
    115 		return;
    116 
    117 	if (action == DA_ON)
    118 		dargs.optflag = DA_ON;
    119 	else if (action == DA_OFF)
    120 		dargs.optflag = DA_OFF | DA_ALLOC_ONLY;
    121 
    122 	dargs.rootdir = NULL;
    123 	dargs.devnames = NULL;
    124 	dargs.devinfo = NULL;
    125 
    126 	(void) da_update_device(&dargs);
    127 }
    128 
    129 /*
    130  * _make_db
    131  *	execs /usr/sbin/mkdevalloc to create device_allocate and
    132  *	device_maps.
    133  */
    134 static int
    135 _make_db()
    136 {
    137 	int	status;
    138 	pid_t	pid, wpid;
    139 
    140 	pid = vfork();
    141 	switch (pid) {
    142 	case -1:
    143 		return (1);
    144 	case 0:
    145 		if (execl(MKDEVALLOC, MKDEVALLOC, DA_IS_LABELED, NULL) == -1)
    146 			exit((errno == ENOENT) ? 0 : 1);
    147 	default:
    148 		for (;;) {
    149 			wpid = waitpid(pid, &status, 0);
    150 			if (wpid == (pid_t)-1) {
    151 				if (errno == EINTR)
    152 					continue;
    153 				else
    154 					return (1);
    155 			} else {
    156 				break;
    157 			}
    158 		}
    159 		break;
    160 	}
    161 
    162 	return ((WIFEXITED(status) == 0) ? 1 : WEXITSTATUS(status));
    163 }
    164 
    165 
    166 /*
    167  * _update_devalloc_db
    168  * 	Forms allocatable device entries to be written to device_allocate and
    169  *	device_maps.
    170  */
    171 /* ARGSUSED */
    172 void
    173 _update_devalloc_db(devlist_t *devlist, int devflag, int action, char *devname,
    174     char *root_dir)
    175 {
    176 	int		i;
    177 	deventry_t	*entry = NULL, *dentry = NULL;
    178 
    179 	if (action == DA_ADD) {
    180 		for (i = 0; i < DA_COUNT; i++) {
    181 			switch (i) {
    182 			case 0:
    183 				dentry = devlist->audio;
    184 				break;
    185 			case 1:
    186 				dentry = devlist->cd;
    187 				break;
    188 			case 2:
    189 				dentry = devlist->floppy;
    190 				break;
    191 			case 3:
    192 				dentry = devlist->tape;
    193 				break;
    194 			case 4:
    195 				dentry = devlist->rmdisk;
    196 				break;
    197 			default:
    198 				return;
    199 			}
    200 			if (dentry)
    201 				_update_dev(dentry, action, NULL);
    202 		}
    203 	} else if (action == DA_REMOVE) {
    204 		if (devflag & DA_AUDIO)
    205 			dentry = devlist->audio;
    206 		else if (devflag & DA_CD)
    207 			dentry = devlist->cd;
    208 		else if (devflag & DA_FLOPPY)
    209 			dentry = devlist->floppy;
    210 		else if (devflag & DA_TAPE)
    211 			dentry = devlist->tape;
    212 		else if (devflag & DA_RMDISK)
    213 			dentry = devlist->rmdisk;
    214 		else
    215 			return;
    216 
    217 		for (entry = dentry; entry != NULL; entry = entry->next) {
    218 			if (strcmp(entry->devinfo.devname, devname) == 0)
    219 				break;
    220 		}
    221 		_update_dev(entry, action, devname);
    222 	}
    223 }
    224 
    225 static void
    226 _update_dev(deventry_t *dentry, int action, char *devname)
    227 {
    228 	da_args		dargs;
    229 	deventry_t	newentry, *entry;
    230 
    231 	dargs.rootdir = NULL;
    232 	dargs.devnames = NULL;
    233 
    234 	if (action == DA_ADD) {
    235 		dargs.optflag = DA_ADD | DA_FORCE;
    236 		for (entry = dentry; entry != NULL; entry = entry->next) {
    237 			dargs.devinfo = &(entry->devinfo);
    238 			(void) da_update_device(&dargs);
    239 		}
    240 	} else if (action == DA_REMOVE) {
    241 		dargs.optflag = DA_REMOVE;
    242 		if (dentry) {
    243 			entry = dentry;
    244 		} else {
    245 			newentry.devinfo.devname = strdup(devname);
    246 			newentry.devinfo.devtype =
    247 			newentry.devinfo.devauths =
    248 			newentry.devinfo.devexec =
    249 			newentry.devinfo.devopts =
    250 			newentry.devinfo.devlist = NULL;
    251 			newentry.devinfo.instance = 0;
    252 			newentry.next = NULL;
    253 			entry = &newentry;
    254 		}
    255 		dargs.devinfo = &(entry->devinfo);
    256 		(void) da_update_device(&dargs);
    257 	}
    258 }
    259