4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
51 #include <libcfs/libcfs.h>
52 #include <lustre/lustre_user.h>
53 #include <lustre/lustre_idl.h>
55 #define PERM_PATHNAME "/etc/lustre/perm.conf"
58 * permission file format is like this:
61 * '*' nid means any nid
62 * '*' uid means any uid
63 * the valid values for perms are:
64 * setuid/setgid/setgrp/rmtacl -- enable corresponding perm
65 * nosetuid/nosetgid/nosetgrp/normtacl -- disable corresponding perm
66 * they can be listed together, seperated by ',',
67 * when perm and noperm are in the same line (item), noperm is preferential,
68 * when they are in different lines (items), the latter is preferential,
69 * '*' nid is as default perm, and is not preferential.
72 static char *progname;
74 static void usage(void)
77 "\nusage: %s {mdtname} {uid}\n"
78 "Normally invoked as an upcall from Lustre, set via:\n"
79 "/proc/fs/lustre/mdt/${mdtname}/identity_upcall\n",
83 static int compare_u32(const void *v1, const void *v2)
85 return (*(__u32 *)v1 - *(__u32 *)v2);
88 static void errlog(const char *fmt, ...)
92 openlog(progname, LOG_PERROR | LOG_PID, LOG_AUTHPRIV);
95 vsyslog(LOG_NOTICE, fmt, args);
101 int get_groups_local(struct identity_downcall_data *data,
102 unsigned int maxgroups)
104 gid_t *groups, *groups_tmp = NULL;
105 unsigned int ngroups = 0;
112 pw = getpwuid(data->idd_uid);
114 errlog("no such user %u\n", data->idd_uid);
115 data->idd_err = errno ? errno : EIDRM;
119 data->idd_gid = pw->pw_gid;
120 namelen = sysconf(_SC_LOGIN_NAME_MAX);
121 if (namelen < _POSIX_LOGIN_NAME_MAX)
122 namelen = _POSIX_LOGIN_NAME_MAX;
124 pw_name = malloc(namelen);
126 errlog("malloc error\n");
127 data->idd_err = errno;
131 strlcpy(pw_name, pw->pw_name, namelen);
132 groups = data->idd_groups;
134 /* Allocate array of size maxgroups instead of handling two
135 * consecutive and potentially racy getgrouplist() calls. */
136 groups_tmp = malloc(maxgroups * sizeof(gid_t));
137 if (groups_tmp == NULL) {
139 data->idd_err = errno ? errno : ENOMEM;
140 errlog("malloc error=%u\n",data->idd_err);
144 ngroups_tmp = maxgroups;
145 if (getgrouplist(pw->pw_name, pw->pw_gid, groups_tmp, &ngroups_tmp) <
149 data->idd_err = errno ? errno : EIDRM;
150 errlog("getgrouplist() error for uid %u: error=%u\n",
151 data->idd_uid, data->idd_err);
155 /* Do not place user's group ID in to the resulting groups list */
156 for (i = 0; i < ngroups_tmp; i++)
157 if (pw->pw_gid != groups_tmp[i])
158 groups[ngroups++] = groups_tmp[i];
161 qsort(groups, ngroups, sizeof(*groups), compare_u32);
162 data->idd_ngroups = ngroups;
169 static inline int comment_line(char *line)
173 while (*p && (*p == ' ' || *p == '\t')) p++;
175 if (!*p || *p == '\n' || *p == '#')
180 static inline int match_uid(uid_t uid, const char *str)
185 if(!strcmp(str, "*"))
188 uid2 = strtoul(str, &end, 0);
191 return (uid == uid2);
199 static perm_type_t perm_types[] = {
200 { "setuid", CFS_SETUID_PERM },
201 { "setgid", CFS_SETGID_PERM },
202 { "setgrp", CFS_SETGRP_PERM },
203 { "rmtacl", CFS_RMTACL_PERM },
204 { "rmtown", CFS_RMTOWN_PERM },
208 static perm_type_t noperm_types[] = {
209 { "nosetuid", CFS_SETUID_PERM },
210 { "nosetgid", CFS_SETGID_PERM },
211 { "nosetgrp", CFS_SETGRP_PERM },
212 { "normtacl", CFS_RMTACL_PERM },
213 { "normtown", CFS_RMTOWN_PERM },
217 int parse_perm(__u32 *perm, __u32 *noperm, char *str)
228 memset(name, 0, sizeof(name));
229 end = strchr(start, ',');
231 end = str + strlen(str);
235 if (len >= sizeof(name))
237 strncpy(name, start, len);
239 for (pt = perm_types; pt->name; pt++) {
240 if (!strcasecmp(name, pt->name)) {
247 for (pt = noperm_types; pt->name; pt++) {
248 if (!strcasecmp(name, pt->name)) {
255 printf("unkown type: %s\n", name);
265 int parse_perm_line(struct identity_downcall_data *data, char *line)
267 char uid_str[256], nid_str[256], perm_str[256];
272 if (data->idd_nperms >= N_PERMS_MAX) {
273 errlog("permission count %d > max %d\n",
274 data->idd_nperms, N_PERMS_MAX);
278 rc = sscanf(line, "%s %s %s", nid_str, uid_str, perm_str);
280 errlog("can't parse line %s\n", line);
284 if (!match_uid(data->idd_uid, uid_str))
287 if (!strcmp(nid_str, "*")) {
290 nid = libcfs_str2nid(nid_str);
291 if (nid == LNET_NID_ANY) {
292 errlog("can't parse nid %s\n", nid_str);
297 if (parse_perm(&perm, &noperm, perm_str)) {
298 errlog("invalid perm %s\n", perm_str);
302 /* merge the perms with the same nid.
304 * If there is LNET_NID_ANY in data->idd_perms[i].pdd_nid,
305 * it must be data->idd_perms[0].pdd_nid, and act as default perm.
307 if (nid != LNET_NID_ANY) {
310 /* search for the same nid */
311 for (i = data->idd_nperms - 1; i >= 0; i--) {
312 if (data->idd_perms[i].pdd_nid == nid) {
313 data->idd_perms[i].pdd_perm =
314 (data->idd_perms[i].pdd_perm | perm) &
321 /* NOT found, add to tail */
323 data->idd_perms[data->idd_nperms].pdd_nid = nid;
324 data->idd_perms[data->idd_nperms].pdd_perm =
329 if (data->idd_nperms > 0) {
330 /* the first one isn't LNET_NID_ANY, need exchange */
331 if (data->idd_perms[0].pdd_nid != LNET_NID_ANY) {
332 data->idd_perms[data->idd_nperms].pdd_nid =
333 data->idd_perms[0].pdd_nid;
334 data->idd_perms[data->idd_nperms].pdd_perm =
335 data->idd_perms[0].pdd_perm;
336 data->idd_perms[0].pdd_nid = LNET_NID_ANY;
337 data->idd_perms[0].pdd_perm = perm & ~noperm;
340 /* only fix LNET_NID_ANY item */
341 data->idd_perms[0].pdd_perm =
342 (data->idd_perms[0].pdd_perm | perm) &
346 /* it is the first one, only add to head */
347 data->idd_perms[0].pdd_nid = LNET_NID_ANY;
348 data->idd_perms[0].pdd_perm = perm & ~noperm;
349 data->idd_nperms = 1;
356 int get_perms(struct identity_downcall_data *data)
361 fp = fopen(PERM_PATHNAME, "r");
363 if (errno == ENOENT) {
366 errlog("open %s failed: %s\n",
367 PERM_PATHNAME, strerror(errno));
368 data->idd_err = errno;
373 while (fgets(line, 1024, fp)) {
374 if (comment_line(line))
377 if (parse_perm_line(data, line)) {
378 errlog("parse line %s failed!\n", line);
379 data->idd_err = EINVAL;
389 static void show_result(struct identity_downcall_data *data)
394 errlog("failed to get identity for uid %d: %s\n",
395 data->idd_uid, strerror(data->idd_err));
399 printf("uid=%d gid=%d", data->idd_uid, data->idd_gid);
400 for (i = 0; i < data->idd_ngroups; i++)
401 printf(",%u", data->idd_groups[i]);
403 printf("permissions:\n"
405 for (i = 0; i < data->idd_nperms; i++) {
406 struct perm_downcall_data *pdd;
408 pdd = &data->idd_perms[i];
410 printf(" "LPX64"\t0x%x\n", pdd->pdd_nid, pdd->pdd_perm);
415 int main(int argc, char **argv)
418 struct identity_downcall_data *data = NULL;
421 int fd, rc = -EINVAL, size, maxgroups;
423 progname = basename(argv[0]);
429 uid = strtoul(argv[2], &end, 0);
431 errlog("%s: invalid uid '%s'\n", progname, argv[2]);
435 maxgroups = sysconf(_SC_NGROUPS_MAX);
436 if (maxgroups > NGROUPS_MAX)
437 maxgroups = NGROUPS_MAX;
438 if (maxgroups == -1) {
443 size = offsetof(struct identity_downcall_data, idd_groups[maxgroups]);
446 errlog("malloc identity downcall data(%d) failed!\n", size);
451 memset(data, 0, size);
452 data->idd_magic = IDENTITY_DOWNCALL_MAGIC;
454 /* get groups for uid */
455 rc = get_groups_local(data, maxgroups);
459 size = offsetof(struct identity_downcall_data,
460 idd_groups[data->idd_ngroups]);
461 /* read permission database */
462 rc = get_perms(data);
465 if (getenv("L_GETIDENTITY_TEST")) {
471 snprintf(procname, sizeof(procname),
472 "/proc/fs/lustre/mdt/%s/identity_info", argv[1]);
473 fd = open(procname, O_WRONLY);
475 errlog("can't open file %s: %s\n", procname, strerror(errno));
480 rc = write(fd, data, size);
483 errlog("partial write ret %d: %s\n", rc, strerror(errno));