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, 2014, 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 <lnet/nidstr.h>
53 #include <lustre/lustre_user.h>
54 #include <lustre/lustre_idl.h>
56 #define PERM_PATHNAME "/etc/lustre/perm.conf"
59 * permission file format is like this:
62 * '*' nid means any nid
63 * '*' uid means any uid
64 * the valid values for perms are:
65 * setuid/setgid/setgrp/rmtacl -- enable corresponding perm
66 * nosetuid/nosetgid/nosetgrp/normtacl -- disable corresponding perm
67 * they can be listed together, seperated by ',',
68 * when perm and noperm are in the same line (item), noperm is preferential,
69 * when they are in different lines (items), the latter is preferential,
70 * '*' nid is as default perm, and is not preferential.
73 static char *progname;
75 static void usage(void)
78 "\nusage: %s {mdtname} {uid}\n"
79 "Normally invoked as an upcall from Lustre, set via:\n"
80 "/proc/fs/lustre/mdt/${mdtname}/identity_upcall\n",
84 static int compare_u32(const void *v1, const void *v2)
86 return (*(__u32 *)v1 - *(__u32 *)v2);
89 static void errlog(const char *fmt, ...)
93 openlog(progname, LOG_PERROR | LOG_PID, LOG_AUTHPRIV);
96 vsyslog(LOG_NOTICE, fmt, args);
102 int get_groups_local(struct identity_downcall_data *data,
103 unsigned int maxgroups)
105 gid_t *groups, *groups_tmp = NULL;
106 unsigned int ngroups = 0;
113 pw = getpwuid(data->idd_uid);
115 errlog("no such user %u\n", data->idd_uid);
116 data->idd_err = errno ? errno : EIDRM;
120 data->idd_gid = pw->pw_gid;
121 namelen = sysconf(_SC_LOGIN_NAME_MAX);
122 if (namelen < _POSIX_LOGIN_NAME_MAX)
123 namelen = _POSIX_LOGIN_NAME_MAX;
125 pw_name = malloc(namelen);
127 errlog("malloc error\n");
128 data->idd_err = errno;
132 strlcpy(pw_name, pw->pw_name, namelen);
133 groups = data->idd_groups;
135 /* Allocate array of size maxgroups instead of handling two
136 * consecutive and potentially racy getgrouplist() calls. */
137 groups_tmp = malloc(maxgroups * sizeof(gid_t));
138 if (groups_tmp == NULL) {
140 data->idd_err = errno ? errno : ENOMEM;
141 errlog("malloc error=%u\n",data->idd_err);
145 ngroups_tmp = maxgroups;
146 if (getgrouplist(pw->pw_name, pw->pw_gid, groups_tmp, &ngroups_tmp) <
150 data->idd_err = errno ? errno : EIDRM;
151 errlog("getgrouplist() error for uid %u: error=%u\n",
152 data->idd_uid, data->idd_err);
156 /* Do not place user's group ID in to the resulting groups list */
157 for (i = 0; i < ngroups_tmp; i++)
158 if (pw->pw_gid != groups_tmp[i])
159 groups[ngroups++] = groups_tmp[i];
162 qsort(groups, ngroups, sizeof(*groups), compare_u32);
163 data->idd_ngroups = ngroups;
170 static inline int comment_line(char *line)
174 while (*p && (*p == ' ' || *p == '\t')) p++;
176 if (!*p || *p == '\n' || *p == '#')
181 static inline int match_uid(uid_t uid, const char *str)
186 if(!strcmp(str, "*"))
189 uid2 = strtoul(str, &end, 0);
192 return (uid == uid2);
200 static perm_type_t perm_types[] = {
201 { "setuid", CFS_SETUID_PERM },
202 { "setgid", CFS_SETGID_PERM },
203 { "setgrp", CFS_SETGRP_PERM },
204 { "rmtacl", CFS_RMTACL_PERM },
205 { "rmtown", CFS_RMTOWN_PERM },
209 static perm_type_t noperm_types[] = {
210 { "nosetuid", CFS_SETUID_PERM },
211 { "nosetgid", CFS_SETGID_PERM },
212 { "nosetgrp", CFS_SETGRP_PERM },
213 { "normtacl", CFS_RMTACL_PERM },
214 { "normtown", CFS_RMTOWN_PERM },
218 int parse_perm(__u32 *perm, __u32 *noperm, char *str)
229 memset(name, 0, sizeof(name));
230 end = strchr(start, ',');
232 end = str + strlen(str);
236 if (len >= sizeof(name))
238 strncpy(name, start, len);
240 for (pt = perm_types; pt->name; pt++) {
241 if (!strcasecmp(name, pt->name)) {
248 for (pt = noperm_types; pt->name; pt++) {
249 if (!strcasecmp(name, pt->name)) {
256 printf("unkown type: %s\n", name);
267 parse_perm_line(struct identity_downcall_data *data, char *line, size_t size)
276 if (data->idd_nperms >= N_PERMS_MAX) {
277 errlog("permission count %d > max %d\n",
278 data->idd_nperms, N_PERMS_MAX);
282 rc = sscanf(line, "%s %s %s", nid_str, uid_str, perm_str);
284 errlog("can't parse line %s\n", line);
288 if (!match_uid(data->idd_uid, uid_str))
291 if (!strcmp(nid_str, "*")) {
294 nid = libcfs_str2nid(nid_str);
295 if (nid == LNET_NID_ANY) {
296 errlog("can't parse nid %s\n", nid_str);
301 if (parse_perm(&perm, &noperm, perm_str)) {
302 errlog("invalid perm %s\n", perm_str);
306 /* merge the perms with the same nid.
308 * If there is LNET_NID_ANY in data->idd_perms[i].pdd_nid,
309 * it must be data->idd_perms[0].pdd_nid, and act as default perm.
311 if (nid != LNET_NID_ANY) {
314 /* search for the same nid */
315 for (i = data->idd_nperms - 1; i >= 0; i--) {
316 if (data->idd_perms[i].pdd_nid == nid) {
317 data->idd_perms[i].pdd_perm =
318 (data->idd_perms[i].pdd_perm | perm) &
325 /* NOT found, add to tail */
327 data->idd_perms[data->idd_nperms].pdd_nid = nid;
328 data->idd_perms[data->idd_nperms].pdd_perm =
333 if (data->idd_nperms > 0) {
334 /* the first one isn't LNET_NID_ANY, need exchange */
335 if (data->idd_perms[0].pdd_nid != LNET_NID_ANY) {
336 data->idd_perms[data->idd_nperms].pdd_nid =
337 data->idd_perms[0].pdd_nid;
338 data->idd_perms[data->idd_nperms].pdd_perm =
339 data->idd_perms[0].pdd_perm;
340 data->idd_perms[0].pdd_nid = LNET_NID_ANY;
341 data->idd_perms[0].pdd_perm = perm & ~noperm;
344 /* only fix LNET_NID_ANY item */
345 data->idd_perms[0].pdd_perm =
346 (data->idd_perms[0].pdd_perm | perm) &
350 /* it is the first one, only add to head */
351 data->idd_perms[0].pdd_nid = LNET_NID_ANY;
352 data->idd_perms[0].pdd_perm = perm & ~noperm;
353 data->idd_nperms = 1;
360 int get_perms(struct identity_downcall_data *data)
365 fp = fopen(PERM_PATHNAME, "r");
367 if (errno == ENOENT) {
370 errlog("open %s failed: %s\n",
371 PERM_PATHNAME, strerror(errno));
372 data->idd_err = errno;
377 while (fgets(line, sizeof(line), fp)) {
378 if (comment_line(line))
381 if (parse_perm_line(data, line, sizeof(line))) {
382 errlog("parse line %s failed!\n", line);
383 data->idd_err = EINVAL;
393 static void show_result(struct identity_downcall_data *data)
398 errlog("failed to get identity for uid %d: %s\n",
399 data->idd_uid, strerror(data->idd_err));
403 printf("uid=%d gid=%d", data->idd_uid, data->idd_gid);
404 for (i = 0; i < data->idd_ngroups; i++)
405 printf(",%u", data->idd_groups[i]);
407 printf("permissions:\n"
409 for (i = 0; i < data->idd_nperms; i++) {
410 struct perm_downcall_data *pdd;
412 pdd = &data->idd_perms[i];
414 printf(" "LPX64"\t0x%x\n", pdd->pdd_nid, pdd->pdd_perm);
419 int main(int argc, char **argv)
422 struct identity_downcall_data *data = NULL;
425 int fd, rc = -EINVAL, size, maxgroups;
427 progname = basename(argv[0]);
433 uid = strtoul(argv[2], &end, 0);
435 errlog("%s: invalid uid '%s'\n", progname, argv[2]);
439 maxgroups = sysconf(_SC_NGROUPS_MAX);
440 if (maxgroups > NGROUPS_MAX)
441 maxgroups = NGROUPS_MAX;
442 if (maxgroups == -1) {
447 size = offsetof(struct identity_downcall_data, idd_groups[maxgroups]);
450 errlog("malloc identity downcall data(%d) failed!\n", size);
455 memset(data, 0, size);
456 data->idd_magic = IDENTITY_DOWNCALL_MAGIC;
458 /* get groups for uid */
459 rc = get_groups_local(data, maxgroups);
463 size = offsetof(struct identity_downcall_data,
464 idd_groups[data->idd_ngroups]);
465 /* read permission database */
466 rc = get_perms(data);
469 if (getenv("L_GETIDENTITY_TEST")) {
475 snprintf(procname, sizeof(procname),
476 "/proc/fs/lustre/mdt/%s/identity_info", argv[1]);
477 fd = open(procname, O_WRONLY);
479 errlog("can't open file %s: %s\n", procname, strerror(errno));
484 rc = write(fd, data, size);
487 errlog("partial write ret %d: %s\n", rc, strerror(errno));