1*3c4226f9Spjha /*
2*3c4226f9Spjha  * CDDL HEADER START
3*3c4226f9Spjha  *
4*3c4226f9Spjha  * The contents of this file are subject to the terms of the
5*3c4226f9Spjha  * Common Development and Distribution License (the "License").
6*3c4226f9Spjha  * You may not use this file except in compliance with the License.
7*3c4226f9Spjha  *
8*3c4226f9Spjha  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9*3c4226f9Spjha  * or http://www.opensolaris.org/os/licensing.
10*3c4226f9Spjha  * See the License for the specific language governing permissions
11*3c4226f9Spjha  * and limitations under the License.
12*3c4226f9Spjha  *
13*3c4226f9Spjha  * When distributing Covered Code, include this CDDL HEADER in each
14*3c4226f9Spjha  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15*3c4226f9Spjha  * If applicable, add the following below this CDDL HEADER, with the
16*3c4226f9Spjha  * fields enclosed by brackets "[]" replaced with your own identifying
17*3c4226f9Spjha  * information: Portions Copyright [yyyy] [name of copyright owner]
18*3c4226f9Spjha  *
19*3c4226f9Spjha  * CDDL HEADER END
20*3c4226f9Spjha  */
21*3c4226f9Spjha 
22*3c4226f9Spjha /*
23*3c4226f9Spjha  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
24*3c4226f9Spjha  * Use is subject to license terms.
25*3c4226f9Spjha  */
26*3c4226f9Spjha 
27*3c4226f9Spjha #pragma ident	"%Z%%M%	%I%	%E% SMI"
28*3c4226f9Spjha 
29*3c4226f9Spjha /*
30*3c4226f9Spjha  * Interfaces for getting device configuration data from kernel
31*3c4226f9Spjha  * through the devinfo driver.
32*3c4226f9Spjha  */
33*3c4226f9Spjha 
34*3c4226f9Spjha #include <stdio.h>
35*3c4226f9Spjha #include <stdlib.h>
36*3c4226f9Spjha #include <string.h>
37*3c4226f9Spjha #include <strings.h>
38*3c4226f9Spjha #include <fcntl.h>
39*3c4226f9Spjha #include <unistd.h>
40*3c4226f9Spjha #include <sys/stat.h>
41*3c4226f9Spjha #include <sys/types.h>
42*3c4226f9Spjha #include <stdarg.h>
43*3c4226f9Spjha #include <unistd.h>
44*3c4226f9Spjha #include <libgen.h>
45*3c4226f9Spjha #include "libdevinfo.h"
46*3c4226f9Spjha 
47*3c4226f9Spjha /* Function Prototypes */
48*3c4226f9Spjha static int di_dli_open(char *, int, short, int);
49*3c4226f9Spjha 
50*3c4226f9Spjha #define	DLI_NAME	0x1
51*3c4226f9Spjha 
52*3c4226f9Spjha /*
53*3c4226f9Spjha  * Private hotplug interfaces to be used between cfgadm pci plugin and
54*3c4226f9Spjha  * devfsadm link generator.
55*3c4226f9Spjha  */
56*3c4226f9Spjha 
57*3c4226f9Spjha 
58*3c4226f9Spjha /*
59*3c4226f9Spjha  * returns a devlink info file name derived from <path>
60*3c4226f9Spjha  * callers need to free the returned string
61*3c4226f9Spjha  */
62*3c4226f9Spjha char *
di_dli_name(char * path)63*3c4226f9Spjha di_dli_name(char *path)
64*3c4226f9Spjha {
65*3c4226f9Spjha #define	dliroot		"/etc/devices/dli/info."
66*3c4226f9Spjha #define	dliroot_len	(sizeof (dliroot) - 1)
67*3c4226f9Spjha 
68*3c4226f9Spjha 	char *dlipath;
69*3c4226f9Spjha 	int dlipathsz;
70*3c4226f9Spjha 	char *basep;
71*3c4226f9Spjha 
72*3c4226f9Spjha 	basep = basename(path);
73*3c4226f9Spjha 	dlipathsz = strlen(basep) + dliroot_len + 1;
74*3c4226f9Spjha 	dlipath = malloc(sizeof (char) * dlipathsz);
75*3c4226f9Spjha 
76*3c4226f9Spjha 	(void) snprintf(dlipath, dlipathsz, "%s%s", dliroot, basep);
77*3c4226f9Spjha 	dlipath[dlipathsz - 1] = '\0';
78*3c4226f9Spjha 	return (dlipath);
79*3c4226f9Spjha 
80*3c4226f9Spjha #undef	dlipre
81*3c4226f9Spjha #undef	dlipre_len
82*3c4226f9Spjha #undef	dliroot
83*3c4226f9Spjha #undef	dliroot_len
84*3c4226f9Spjha }
85*3c4226f9Spjha 
86*3c4226f9Spjha 
87*3c4226f9Spjha static int
di_dli_open(char * path,int oflag,short l_type,int flags)88*3c4226f9Spjha di_dli_open(char *path, int oflag, short l_type, int flags)
89*3c4226f9Spjha {
90*3c4226f9Spjha 	int fd;
91*3c4226f9Spjha 	char *dlipath, *dlipath_dir, *dlipath_dup;
92*3c4226f9Spjha 	struct stat statbuf;
93*3c4226f9Spjha 	int mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
94*3c4226f9Spjha 	flock_t lock;
95*3c4226f9Spjha 
96*3c4226f9Spjha 	dlipath = (flags & DLI_NAME) ? di_dli_name(path) : (char *)path;
97*3c4226f9Spjha 	dlipath_dup = strdup(dlipath);
98*3c4226f9Spjha 	dlipath_dir = dirname(dlipath_dup);
99*3c4226f9Spjha 
100*3c4226f9Spjha 	if (stat(dlipath_dir, &statbuf) < 0) {
101*3c4226f9Spjha 		if (mkdirp(dlipath_dir,
102*3c4226f9Spjha 		    S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) < 0) {
103*3c4226f9Spjha 			fd = -1;
104*3c4226f9Spjha 			goto OUT;
105*3c4226f9Spjha 		}
106*3c4226f9Spjha 	}
107*3c4226f9Spjha 
108*3c4226f9Spjha 	fd = open(dlipath, oflag, mode);
109*3c4226f9Spjha 	if (fd < 0)
110*3c4226f9Spjha 		goto OUT;
111*3c4226f9Spjha 
112*3c4226f9Spjha 	if (fchmod(fd, mode) < 0) {
113*3c4226f9Spjha 		(void) close(fd);
114*3c4226f9Spjha 		fd = -1;
115*3c4226f9Spjha 		goto OUT;
116*3c4226f9Spjha 	}
117*3c4226f9Spjha 
118*3c4226f9Spjha 	bzero(&lock, sizeof (lock));
119*3c4226f9Spjha 	lock.l_type = l_type;
120*3c4226f9Spjha 	if (fcntl(fd, F_SETLKW, &lock) < 0) {
121*3c4226f9Spjha 		(void) close(fd);
122*3c4226f9Spjha 		fd = -1;
123*3c4226f9Spjha 	}
124*3c4226f9Spjha OUT:
125*3c4226f9Spjha 	free(dlipath_dup);
126*3c4226f9Spjha 	if (flags & DLI_NAME)
127*3c4226f9Spjha 		free(dlipath);
128*3c4226f9Spjha 	return (fd);
129*3c4226f9Spjha }
130*3c4226f9Spjha 
131*3c4226f9Spjha 
132*3c4226f9Spjha int
di_dli_openr(char * path)133*3c4226f9Spjha di_dli_openr(char *path)
134*3c4226f9Spjha {
135*3c4226f9Spjha 	return (di_dli_open(path, O_RDONLY, F_RDLCK, DLI_NAME));
136*3c4226f9Spjha }
137*3c4226f9Spjha 
138*3c4226f9Spjha 
139*3c4226f9Spjha int
di_dli_openw(char * path)140*3c4226f9Spjha di_dli_openw(char *path)
141*3c4226f9Spjha {
142*3c4226f9Spjha 	return (di_dli_open(path, O_RDWR | O_SYNC | O_TRUNC | O_CREAT,
143*3c4226f9Spjha 	    F_WRLCK, DLI_NAME));
144*3c4226f9Spjha }
145*3c4226f9Spjha 
146*3c4226f9Spjha 
147*3c4226f9Spjha void
di_dli_close(int fd)148*3c4226f9Spjha di_dli_close(int fd)
149*3c4226f9Spjha {
150*3c4226f9Spjha 	flock_t lock;
151*3c4226f9Spjha 	if (fd < 0)
152*3c4226f9Spjha 		return;
153*3c4226f9Spjha 
154*3c4226f9Spjha 	bzero(&lock, sizeof (lock));
155*3c4226f9Spjha 	lock.l_type = F_UNLCK;
156*3c4226f9Spjha 	(void) fcntl(fd, F_SETLK, &lock);
157*3c4226f9Spjha 	(void) close(fd);
158*3c4226f9Spjha }
159