1*7a286c47SDai Ngo /*
2*7a286c47SDai Ngo * CDDL HEADER START
3*7a286c47SDai Ngo *
4*7a286c47SDai Ngo * The contents of this file are subject to the terms of the
5*7a286c47SDai Ngo * Common Development and Distribution License (the "License").
6*7a286c47SDai Ngo * You may not use this file except in compliance with the License.
7*7a286c47SDai Ngo *
8*7a286c47SDai Ngo * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9*7a286c47SDai Ngo * or http://www.opensolaris.org/os/licensing.
10*7a286c47SDai Ngo * See the License for the specific language governing permissions
11*7a286c47SDai Ngo * and limitations under the License.
12*7a286c47SDai Ngo *
13*7a286c47SDai Ngo * When distributing Covered Code, include this CDDL HEADER in each
14*7a286c47SDai Ngo * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15*7a286c47SDai Ngo * If applicable, add the following below this CDDL HEADER, with the
16*7a286c47SDai Ngo * fields enclosed by brackets "[]" replaced with your own identifying
17*7a286c47SDai Ngo * information: Portions Copyright [yyyy] [name of copyright owner]
18*7a286c47SDai Ngo *
19*7a286c47SDai Ngo * CDDL HEADER END
20*7a286c47SDai Ngo */
21*7a286c47SDai Ngo /*
22*7a286c47SDai Ngo * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
23*7a286c47SDai Ngo * Use is subject to license terms.
24*7a286c47SDai Ngo */
25*7a286c47SDai Ngo
26*7a286c47SDai Ngo #include <sys/types.h>
27*7a286c47SDai Ngo #include <sys/param.h>
28*7a286c47SDai Ngo #include <sys/errno.h>
29*7a286c47SDai Ngo
30*7a286c47SDai Ngo #ifdef _KERNEL
31*7a286c47SDai Ngo #include <sys/sunddi.h>
32*7a286c47SDai Ngo #include <fs/fs_reparse.h>
33*7a286c47SDai Ngo #else
34*7a286c47SDai Ngo #include <string.h>
35*7a286c47SDai Ngo #include <limits.h>
36*7a286c47SDai Ngo #include <sys/fs_reparse.h>
37*7a286c47SDai Ngo
38*7a286c47SDai Ngo #define strfree(str) free((str))
39*7a286c47SDai Ngo #endif
40*7a286c47SDai Ngo
41*7a286c47SDai Ngo static char *reparse_skipspace(char *cp);
42*7a286c47SDai Ngo static int reparse_create_nvlist(const char *string, nvlist_t *nvl);
43*7a286c47SDai Ngo static int reparse_add_nvpair(char *token, nvlist_t *nvl);
44*7a286c47SDai Ngo static boolean_t reparse_validate_svctype(char *svc_str);
45*7a286c47SDai Ngo static int reparse_validate_create_nvlist(const char *string, nvlist_t *nvl);
46*7a286c47SDai Ngo
47*7a286c47SDai Ngo /* array of characters not allowed in service type string */
48*7a286c47SDai Ngo static char svctype_invalid_chars[] = { '{', '}', 0 };
49*7a286c47SDai Ngo
50*7a286c47SDai Ngo /*
51*7a286c47SDai Ngo * reparse_init()
52*7a286c47SDai Ngo *
53*7a286c47SDai Ngo * Function to allocate a new name-value pair list.
54*7a286c47SDai Ngo * Caller needs to call reparse_free() to free memory
55*7a286c47SDai Ngo * used by the list when done.
56*7a286c47SDai Ngo *
57*7a286c47SDai Ngo * Return pointer to new list else return NULL.
58*7a286c47SDai Ngo */
59*7a286c47SDai Ngo nvlist_t *
reparse_init(void)60*7a286c47SDai Ngo reparse_init(void)
61*7a286c47SDai Ngo {
62*7a286c47SDai Ngo nvlist_t *nvl;
63*7a286c47SDai Ngo
64*7a286c47SDai Ngo /*
65*7a286c47SDai Ngo * Service type is unique, only one entry
66*7a286c47SDai Ngo * of each service type is allowed
67*7a286c47SDai Ngo */
68*7a286c47SDai Ngo if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0))
69*7a286c47SDai Ngo return (NULL);
70*7a286c47SDai Ngo
71*7a286c47SDai Ngo return (nvl);
72*7a286c47SDai Ngo }
73*7a286c47SDai Ngo
74*7a286c47SDai Ngo /*
75*7a286c47SDai Ngo * reparse_free()
76*7a286c47SDai Ngo *
77*7a286c47SDai Ngo * Function to free memory of a nvlist allocated previously
78*7a286c47SDai Ngo * by reparse_init().
79*7a286c47SDai Ngo */
80*7a286c47SDai Ngo void
reparse_free(nvlist_t * nvl)81*7a286c47SDai Ngo reparse_free(nvlist_t *nvl)
82*7a286c47SDai Ngo {
83*7a286c47SDai Ngo nvlist_free(nvl);
84*7a286c47SDai Ngo }
85*7a286c47SDai Ngo
86*7a286c47SDai Ngo /*
87*7a286c47SDai Ngo * reparse_parse()
88*7a286c47SDai Ngo *
89*7a286c47SDai Ngo * Parse the specified string and populate the nvlist with the svc_types
90*7a286c47SDai Ngo * and data from the 'string'. The string could be read from the reparse
91*7a286c47SDai Ngo * point symlink body. This routine will allocate memory that must be
92*7a286c47SDai Ngo * freed by reparse_free().
93*7a286c47SDai Ngo *
94*7a286c47SDai Ngo * If ok return 0 and the nvlist is populated, otherwise return error code.
95*7a286c47SDai Ngo */
96*7a286c47SDai Ngo int
reparse_parse(const char * string,nvlist_t * nvl)97*7a286c47SDai Ngo reparse_parse(const char *string, nvlist_t *nvl)
98*7a286c47SDai Ngo {
99*7a286c47SDai Ngo int err;
100*7a286c47SDai Ngo
101*7a286c47SDai Ngo if (string == NULL || nvl == NULL)
102*7a286c47SDai Ngo return (EINVAL);
103*7a286c47SDai Ngo
104*7a286c47SDai Ngo if ((err = reparse_validate(string)) != 0)
105*7a286c47SDai Ngo return (err);
106*7a286c47SDai Ngo
107*7a286c47SDai Ngo if ((err = reparse_create_nvlist(string, nvl)) != 0)
108*7a286c47SDai Ngo return (err);
109*7a286c47SDai Ngo
110*7a286c47SDai Ngo return (0);
111*7a286c47SDai Ngo }
112*7a286c47SDai Ngo
113*7a286c47SDai Ngo static char *
reparse_skipspace(char * cp)114*7a286c47SDai Ngo reparse_skipspace(char *cp)
115*7a286c47SDai Ngo {
116*7a286c47SDai Ngo while ((*cp) && (*cp == ' ' || *cp == '\t'))
117*7a286c47SDai Ngo cp++;
118*7a286c47SDai Ngo return (cp);
119*7a286c47SDai Ngo }
120*7a286c47SDai Ngo
121*7a286c47SDai Ngo static boolean_t
reparse_validate_svctype(char * svc_str)122*7a286c47SDai Ngo reparse_validate_svctype(char *svc_str)
123*7a286c47SDai Ngo {
124*7a286c47SDai Ngo int nx, ix, len;
125*7a286c47SDai Ngo
126*7a286c47SDai Ngo if (svc_str == NULL)
127*7a286c47SDai Ngo return (B_FALSE);
128*7a286c47SDai Ngo
129*7a286c47SDai Ngo len = strlen(svc_str);
130*7a286c47SDai Ngo for (ix = 0; ix < len; ix++) {
131*7a286c47SDai Ngo for (nx = 0; nx < sizeof (svctype_invalid_chars); nx++) {
132*7a286c47SDai Ngo if (svc_str[ix] == svctype_invalid_chars[nx])
133*7a286c47SDai Ngo return (B_FALSE);
134*7a286c47SDai Ngo }
135*7a286c47SDai Ngo }
136*7a286c47SDai Ngo return (B_TRUE);
137*7a286c47SDai Ngo }
138*7a286c47SDai Ngo
139*7a286c47SDai Ngo static boolean_t
reparse_validate_svc_token(char * svc_token)140*7a286c47SDai Ngo reparse_validate_svc_token(char *svc_token)
141*7a286c47SDai Ngo {
142*7a286c47SDai Ngo char save_c, *cp;
143*7a286c47SDai Ngo
144*7a286c47SDai Ngo if (svc_token == NULL)
145*7a286c47SDai Ngo return (B_FALSE);
146*7a286c47SDai Ngo if ((cp = strchr(svc_token, ':')) == NULL)
147*7a286c47SDai Ngo return (B_FALSE);
148*7a286c47SDai Ngo
149*7a286c47SDai Ngo save_c = *cp;
150*7a286c47SDai Ngo *cp = '\0';
151*7a286c47SDai Ngo
152*7a286c47SDai Ngo /*
153*7a286c47SDai Ngo * make sure service type and service data are non-empty string.
154*7a286c47SDai Ngo */
155*7a286c47SDai Ngo if (strlen(svc_token) == 0 || strlen(cp + 1) == 0) {
156*7a286c47SDai Ngo *cp = save_c;
157*7a286c47SDai Ngo return (B_FALSE);
158*7a286c47SDai Ngo }
159*7a286c47SDai Ngo
160*7a286c47SDai Ngo *cp = save_c;
161*7a286c47SDai Ngo return (B_TRUE);
162*7a286c47SDai Ngo }
163*7a286c47SDai Ngo
164*7a286c47SDai Ngo /*
165*7a286c47SDai Ngo * Format of reparse data:
166*7a286c47SDai Ngo * @{REPARSE@{servicetype:data} [@{servicetype:data}] ...}
167*7a286c47SDai Ngo * REPARSE_TAG_STR@{REPARSE_TOKEN} [@{REPARSE_TOKEN}] ... REPARSE_TAG_END
168*7a286c47SDai Ngo *
169*7a286c47SDai Ngo * Validating reparse data:
170*7a286c47SDai Ngo * . check for valid length of reparse data
171*7a286c47SDai Ngo * . check for valid reparse data format
172*7a286c47SDai Ngo * Return 0 if OK else return error code.
173*7a286c47SDai Ngo */
174*7a286c47SDai Ngo int
reparse_validate(const char * string)175*7a286c47SDai Ngo reparse_validate(const char *string)
176*7a286c47SDai Ngo {
177*7a286c47SDai Ngo return (reparse_validate_create_nvlist(string, NULL));
178*7a286c47SDai Ngo }
179*7a286c47SDai Ngo
180*7a286c47SDai Ngo /*
181*7a286c47SDai Ngo * reparse_validate_create_nvlist
182*7a286c47SDai Ngo *
183*7a286c47SDai Ngo * dual-purpose function:
184*7a286c47SDai Ngo * . Validate a reparse data string.
185*7a286c47SDai Ngo * . Validate a reparse data string and parse the data
186*7a286c47SDai Ngo * into a nvlist.
187*7a286c47SDai Ngo */
188*7a286c47SDai Ngo static int
reparse_validate_create_nvlist(const char * string,nvlist_t * nvl)189*7a286c47SDai Ngo reparse_validate_create_nvlist(const char *string, nvlist_t *nvl)
190*7a286c47SDai Ngo {
191*7a286c47SDai Ngo int err, tcnt;
192*7a286c47SDai Ngo char *reparse_data, save_c, save_e, *save_e_ptr, *cp, *s_str, *e_str;
193*7a286c47SDai Ngo
194*7a286c47SDai Ngo if (string == NULL)
195*7a286c47SDai Ngo return (EINVAL);
196*7a286c47SDai Ngo
197*7a286c47SDai Ngo if (strlen(string) >= MAXREPARSELEN)
198*7a286c47SDai Ngo return (ENAMETOOLONG);
199*7a286c47SDai Ngo
200*7a286c47SDai Ngo if ((reparse_data = strdup(string)) == NULL)
201*7a286c47SDai Ngo return (ENOMEM);
202*7a286c47SDai Ngo
203*7a286c47SDai Ngo /* check FS_REPARSE_TAG_STR */
204*7a286c47SDai Ngo if (strncmp(reparse_data, FS_REPARSE_TAG_STR,
205*7a286c47SDai Ngo strlen(FS_REPARSE_TAG_STR))) {
206*7a286c47SDai Ngo strfree(reparse_data);
207*7a286c47SDai Ngo return (EINVAL);
208*7a286c47SDai Ngo }
209*7a286c47SDai Ngo
210*7a286c47SDai Ngo /* locate FS_REPARSE_TAG_END_CHAR */
211*7a286c47SDai Ngo if ((cp = strrchr(reparse_data, FS_REPARSE_TAG_END_CHAR)) == NULL) {
212*7a286c47SDai Ngo strfree(reparse_data);
213*7a286c47SDai Ngo return (EINVAL);
214*7a286c47SDai Ngo }
215*7a286c47SDai Ngo save_e = *cp;
216*7a286c47SDai Ngo save_e_ptr = cp;
217*7a286c47SDai Ngo *cp = '\0';
218*7a286c47SDai Ngo
219*7a286c47SDai Ngo e_str = cp;
220*7a286c47SDai Ngo cp++; /* should point to NULL, or spaces */
221*7a286c47SDai Ngo
222*7a286c47SDai Ngo cp = reparse_skipspace(cp);
223*7a286c47SDai Ngo if (*cp) {
224*7a286c47SDai Ngo *save_e_ptr = save_e;
225*7a286c47SDai Ngo strfree(reparse_data);
226*7a286c47SDai Ngo return (EINVAL);
227*7a286c47SDai Ngo }
228*7a286c47SDai Ngo
229*7a286c47SDai Ngo /* skip FS_REPARSE_TAG_STR */
230*7a286c47SDai Ngo s_str = reparse_data + strlen(FS_REPARSE_TAG_STR);
231*7a286c47SDai Ngo
232*7a286c47SDai Ngo /* skip spaces after FS_REPARSE_TAG_STR */
233*7a286c47SDai Ngo s_str = reparse_skipspace(s_str);
234*7a286c47SDai Ngo
235*7a286c47SDai Ngo tcnt = 0;
236*7a286c47SDai Ngo while (s_str < e_str) {
237*7a286c47SDai Ngo /* check FS_TOKEN_START_STR */
238*7a286c47SDai Ngo if (strncmp(s_str, FS_TOKEN_START_STR,
239*7a286c47SDai Ngo strlen(FS_TOKEN_START_STR))) {
240*7a286c47SDai Ngo *save_e_ptr = save_e;
241*7a286c47SDai Ngo strfree(reparse_data);
242*7a286c47SDai Ngo return (EINVAL);
243*7a286c47SDai Ngo }
244*7a286c47SDai Ngo
245*7a286c47SDai Ngo /* skip over FS_TOKEN_START_STR */
246*7a286c47SDai Ngo s_str += strlen(FS_TOKEN_START_STR);
247*7a286c47SDai Ngo
248*7a286c47SDai Ngo /* locate FS_TOKEN_END_STR */
249*7a286c47SDai Ngo if ((cp = strstr(s_str, FS_TOKEN_END_STR)) == NULL) {
250*7a286c47SDai Ngo *save_e_ptr = save_e;
251*7a286c47SDai Ngo strfree(reparse_data);
252*7a286c47SDai Ngo return (EINVAL);
253*7a286c47SDai Ngo }
254*7a286c47SDai Ngo
255*7a286c47SDai Ngo tcnt++;
256*7a286c47SDai Ngo save_c = *cp;
257*7a286c47SDai Ngo *cp = '\0';
258*7a286c47SDai Ngo
259*7a286c47SDai Ngo /* check for valid characters in service type */
260*7a286c47SDai Ngo if (reparse_validate_svctype(s_str) == B_FALSE) {
261*7a286c47SDai Ngo *cp = save_c;
262*7a286c47SDai Ngo *save_e_ptr = save_e;
263*7a286c47SDai Ngo strfree(reparse_data);
264*7a286c47SDai Ngo return (EINVAL);
265*7a286c47SDai Ngo }
266*7a286c47SDai Ngo
267*7a286c47SDai Ngo if (strlen(s_str) == 0) {
268*7a286c47SDai Ngo *cp = save_c;
269*7a286c47SDai Ngo *save_e_ptr = save_e;
270*7a286c47SDai Ngo strfree(reparse_data);
271*7a286c47SDai Ngo return (EINVAL);
272*7a286c47SDai Ngo }
273*7a286c47SDai Ngo
274*7a286c47SDai Ngo if (reparse_validate_svc_token(s_str) == B_FALSE) {
275*7a286c47SDai Ngo *cp = save_c;
276*7a286c47SDai Ngo *save_e_ptr = save_e;
277*7a286c47SDai Ngo strfree(reparse_data);
278*7a286c47SDai Ngo return (EINVAL);
279*7a286c47SDai Ngo }
280*7a286c47SDai Ngo
281*7a286c47SDai Ngo /* create a nvpair entry */
282*7a286c47SDai Ngo if (nvl != NULL &&
283*7a286c47SDai Ngo (err = reparse_add_nvpair(s_str, nvl)) != 0) {
284*7a286c47SDai Ngo *cp = save_c;
285*7a286c47SDai Ngo *save_e_ptr = save_e;
286*7a286c47SDai Ngo strfree(reparse_data);
287*7a286c47SDai Ngo return (err);
288*7a286c47SDai Ngo }
289*7a286c47SDai Ngo
290*7a286c47SDai Ngo *cp = save_c;
291*7a286c47SDai Ngo
292*7a286c47SDai Ngo /* skip over FS_TOKEN_END_STR */
293*7a286c47SDai Ngo cp += strlen(FS_TOKEN_END_STR);
294*7a286c47SDai Ngo cp = reparse_skipspace(cp);
295*7a286c47SDai Ngo s_str = cp;
296*7a286c47SDai Ngo }
297*7a286c47SDai Ngo *save_e_ptr = save_e;
298*7a286c47SDai Ngo strfree(reparse_data);
299*7a286c47SDai Ngo
300*7a286c47SDai Ngo return (tcnt ? 0 : EINVAL);
301*7a286c47SDai Ngo }
302*7a286c47SDai Ngo
303*7a286c47SDai Ngo static int
reparse_add_nvpair(char * token,nvlist_t * nvl)304*7a286c47SDai Ngo reparse_add_nvpair(char *token, nvlist_t *nvl)
305*7a286c47SDai Ngo {
306*7a286c47SDai Ngo int err;
307*7a286c47SDai Ngo char save_c, *cp;
308*7a286c47SDai Ngo
309*7a286c47SDai Ngo if ((cp = strchr(token, ':')) == NULL)
310*7a286c47SDai Ngo return (EINVAL);
311*7a286c47SDai Ngo
312*7a286c47SDai Ngo save_c = *cp;
313*7a286c47SDai Ngo *cp = '\0';
314*7a286c47SDai Ngo err = nvlist_add_string(nvl, token, cp + 1);
315*7a286c47SDai Ngo *cp = save_c;
316*7a286c47SDai Ngo
317*7a286c47SDai Ngo return (err);
318*7a286c47SDai Ngo }
319*7a286c47SDai Ngo
320*7a286c47SDai Ngo static int
reparse_create_nvlist(const char * string,nvlist_t * nvl)321*7a286c47SDai Ngo reparse_create_nvlist(const char *string, nvlist_t *nvl)
322*7a286c47SDai Ngo {
323*7a286c47SDai Ngo if (nvl == NULL)
324*7a286c47SDai Ngo return (EINVAL);
325*7a286c47SDai Ngo
326*7a286c47SDai Ngo return (reparse_validate_create_nvlist(string, nvl));
327*7a286c47SDai Ngo }
328