2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
16 #include <afsconfig.h>
17 #include "afs/param.h"
22 #include "afs/sysincludes.h"
23 #include "afsincludes.h"
24 #include "afs/afs_stats.h" /* statistics */
25 #ifdef AFS_LINUX22_ENV
26 #include "h/smp_lock.h"
29 #if defined(AFS_LINUX26_ENV)
31 afs_setgroups(cred_t **cr, struct group_info *group_info, int change_parent)
33 struct group_info *old_info;
35 AFS_STATCNT(afs_setgroups);
37 old_info = (*cr)->cr_group_info;
38 get_group_info(group_info);
39 (*cr)->cr_group_info = group_info;
40 put_group_info(old_info);
45 old_info = current->parent->group_info;
46 get_group_info(group_info);
47 current->parent->group_info = group_info;
48 put_group_info(old_info);
55 afs_setgroups(cred_t **cr, int ngroups, gid_t * gidset, int change_parent)
61 AFS_STATCNT(afs_setgroups);
63 if (ngroups > NGROUPS)
66 gp = (*cr)->cr_groups;
67 if (ngroups < NGROUPS)
68 gp[ngroups] = (gid_t) NOGROUP;
70 for (i = ngroups; i > 0; i--) {
74 (*cr)->cr_ngroups = ngroups;
80 #if defined(AFS_LINUX26_ENV)
81 static struct group_info *
82 afs_getgroups(cred_t * cr)
84 AFS_STATCNT(afs_getgroups);
86 get_group_info(cr->cr_group_info);
87 return cr->cr_group_info;
90 /* Returns number of groups. And we trust groups to be large enough to
91 * hold all the groups.
94 afs_getgroups(cred_t *cr, gid_t *groups)
100 AFS_STATCNT(afs_getgroups);
105 for (i = 0; (i < n) && (*gp != (gid_t) NOGROUP); i++)
111 #if !defined(AFS_LINUX26_ENV)
112 /* Only propogate the PAG to the parent process. Unix's propogate to
113 * all processes sharing the cred.
116 set_pag_in_parent(int pag, int g0, int g1)
119 #ifdef STRUCT_TASK_STRUCT_HAS_PARENT
120 gid_t *gp = current->parent->groups;
121 int ngroups = current->parent->ngroups;
123 gid_t *gp = current->p_pptr->groups;
124 int ngroups = current->p_pptr->ngroups;
127 if ((ngroups < 2) || (afs_get_pag_from_groups(gp[0], gp[1]) == NOPAG)) {
128 /* We will have to shift grouplist to make room for pag */
129 if (ngroups + 2 > NGROUPS) {
132 for (i = ngroups - 1; i >= 0; i--) {
139 if (ngroups < NGROUPS)
140 gp[ngroups] = NOGROUP;
142 #ifdef STRUCT_TASK_STRUCT_HAS_PARENT
143 current->parent->ngroups = ngroups;
145 current->p_pptr->ngroups = ngroups;
152 setpag(cred_t ** cr, afs_uint32 pagvalue, afs_uint32 * newpag,
155 #if defined(AFS_LINUX26_ENV)
156 struct group_info *group_info;
158 struct group_info *tmp;
164 group_info = afs_getgroups(*cr);
165 if (group_info->ngroups < 2
166 || afs_get_pag_from_groups(GROUP_AT(group_info, 0),
167 GROUP_AT(group_info, 1)) == NOPAG)
168 /* We will have to make sure group_info is big enough for pag */
171 tmp = groups_alloc(group_info->ngroups + need_space);
173 for (i = 0; i < group_info->ngroups; ++i)
174 GROUP_AT(tmp, i + need_space) = GROUP_AT(group_info, i);
177 *newpag = (pagvalue == -1 ? genpag() : pagvalue);
178 afs_get_groups_from_pag(*newpag, &g0, &g1);
179 GROUP_AT(group_info, 0) = g0;
180 GROUP_AT(group_info, 1) = g1;
182 afs_setgroups(cr, group_info, change_parent);
184 put_group_info(group_info);
189 afs_int32 ngroups, code = 0;
194 gidset = (gid_t *) osi_Alloc(NGROUPS * sizeof(gidset[0]));
195 ngroups = afs_getgroups(*cr, gidset);
197 if (afs_get_pag_from_groups(gidset[0], gidset[1]) == NOPAG) {
198 /* We will have to shift grouplist to make room for pag */
199 if (ngroups + 2 > NGROUPS) {
200 osi_Free((char *)gidset, NGROUPS * sizeof(int));
203 for (j = ngroups - 1; j >= 0; j--) {
204 gidset[j + 2] = gidset[j];
208 *newpag = (pagvalue == -1 ? genpag() : pagvalue);
209 afs_get_groups_from_pag(*newpag, &gidset[0], &gidset[1]);
210 code = afs_setgroups(cr, ngroups, gidset, change_parent);
212 /* If change_parent is set, then we should set the pag in the parent as
215 if (change_parent && !code) {
216 code = set_pag_in_parent(*newpag, gidset[0], gidset[1]);
219 osi_Free((char *)gidset, NGROUPS * sizeof(int));
225 /* Intercept the standard system call. */
226 extern asmlinkage long (*sys_setgroupsp) (int gidsetsize, gid_t * grouplist);
228 afs_xsetgroups(int gidsetsize, gid_t * grouplist)
231 cred_t *cr = crref();
236 old_pag = PagInCred(cr);
240 code = (*sys_setgroupsp) (gidsetsize, grouplist);
247 if (old_pag != NOPAG && PagInCred(cr) == NOPAG) {
248 /* re-install old pag if there's room. */
249 code = setpag(&cr, old_pag, &junk, 0);
254 /* Linux syscall ABI returns errno as negative */
258 #if defined(AFS_LINUX24_ENV)
259 /* Intercept the standard uid32 system call. */
260 extern asmlinkage long (*sys_setgroups32p) (int gidsetsize, gid_t * grouplist);
262 afs_xsetgroups32(int gidsetsize, gid_t * grouplist)
265 cred_t *cr = crref();
270 old_pag = PagInCred(cr);
274 code = (*sys_setgroups32p) (gidsetsize, grouplist);
282 if (old_pag != NOPAG && PagInCred(cr) == NOPAG) {
283 /* re-install old pag if there's room. */
284 code = setpag(&cr, old_pag, &junk, 0);
289 /* Linux syscall ABI returns errno as negative */
294 #if defined(AFS_PPC64_LINUX20_ENV)
295 /* Intercept the uid16 system call as used by 32bit programs. */
296 extern long (*sys32_setgroupsp)(int gidsetsize, gid_t *grouplist);
297 asmlinkage long afs32_xsetgroups(int gidsetsize, gid_t *grouplist)
300 cred_t *cr = crref();
305 old_pag = PagInCred(cr);
309 code = (*sys32_setgroupsp)(gidsetsize, grouplist);
316 if (old_pag != NOPAG && PagInCred(cr) == NOPAG) {
317 /* re-install old pag if there's room. */
318 code = setpag(&cr, old_pag, &junk, 0);
323 /* Linux syscall ABI returns errno as negative */
328 #if defined(AFS_SPARC64_LINUX20_ENV) || defined(AFS_AMD64_LINUX20_ENV)
329 /* Intercept the uid16 system call as used by 32bit programs. */
330 extern long (*sys32_setgroupsp) (int gidsetsize, u16 * grouplist);
332 afs32_xsetgroups(int gidsetsize, u16 * grouplist)
335 cred_t *cr = crref();
340 old_pag = PagInCred(cr);
344 code = (*sys32_setgroupsp) (gidsetsize, grouplist);
351 if (old_pag != NOPAG && PagInCred(cr) == NOPAG) {
352 /* re-install old pag if there's room. */
353 code = setpag(&cr, old_pag, &junk, 0);
358 /* Linux syscall ABI returns errno as negative */
362 #ifdef AFS_LINUX24_ENV
363 /* Intercept the uid32 system call as used by 32bit programs. */
364 extern long (*sys32_setgroups32p) (int gidsetsize, gid_t * grouplist);
366 afs32_xsetgroups32(int gidsetsize, gid_t * grouplist)
369 cred_t *cr = crref();
374 old_pag = PagInCred(cr);
378 code = (*sys32_setgroups32p) (gidsetsize, grouplist);
385 if (old_pag != NOPAG && PagInCred(cr) == NOPAG) {
386 /* re-install old pag if there's room. */
387 code = setpag(&cr, old_pag, &junk, 0);
392 /* Linux syscall ABI returns errno as negative */