1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
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15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
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23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * libcfs/libcfs/linux/linux-curproc.c
38 * Lustre curproc API implementation for Linux kernel
40 * Author: Nikita Danilov <nikita@clusterfs.com>
43 #include <linux/sched.h>
44 #include <linux/fs_struct.h>
46 #define DEBUG_SUBSYSTEM S_LNET
48 #include <libcfs/libcfs.h>
51 * Implementation of cfs_curproc API (see portals/include/libcfs/curproc.h)
55 uid_t cfs_curproc_uid(void)
60 gid_t cfs_curproc_gid(void)
65 uid_t cfs_curproc_fsuid(void)
67 return current_fsuid();
70 uid_t cfs_curproc_euid(void)
72 return current_egid();
75 uid_t cfs_curproc_egid(void)
77 return current_egid();
80 gid_t cfs_curproc_fsgid(void)
82 return current_fsgid();
85 pid_t cfs_curproc_pid(void)
90 int cfs_curproc_groups_nr(void)
94 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,4)
96 nr = current_cred()->group_info->ngroups;
99 nr = current->ngroups;
104 void cfs_curproc_groups_dump(gid_t *array, int size)
106 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,4)
108 size = min_t(int, size, current_cred()->group_info->ngroups);
109 memcpy(array, current_cred()->group_info->blocks[0], size * sizeof(__u32));
110 task_unlock(current);
112 LASSERT(size <= NGROUPS);
113 size = min_t(int, size, current->ngroups);
114 memcpy(array, current->groups, size * sizeof(__u32));
119 int cfs_curproc_is_in_groups(gid_t gid)
121 return in_group_p(gid);
124 mode_t cfs_curproc_umask(void)
126 return current->fs->umask;
129 char *cfs_curproc_comm(void)
131 return current->comm;
134 /* Currently all the CFS_CAP_* defines match CAP_* ones. */
135 #define cfs_cap_pack(cap) (cap)
136 #define cfs_cap_unpack(cap) (cap)
138 void cfs_cap_raise(cfs_cap_t cap)
141 if ((cred = prepare_creds())) {
142 cap_raise(cred->cap_effective, cfs_cap_unpack(cap));
147 void cfs_cap_lower(cfs_cap_t cap)
150 if ((cred = prepare_creds())) {
151 cap_lower(cred->cap_effective, cfs_cap_unpack(cap));
156 int cfs_cap_raised(cfs_cap_t cap)
158 return cap_raised(current_cap(), cfs_cap_unpack(cap));
161 void cfs_kernel_cap_pack(cfs_kernel_cap_t kcap, cfs_cap_t *cap)
163 #if defined (_LINUX_CAPABILITY_VERSION) && _LINUX_CAPABILITY_VERSION == 0x19980330
164 *cap = cfs_cap_pack(kcap);
165 #elif defined (_LINUX_CAPABILITY_VERSION) && _LINUX_CAPABILITY_VERSION == 0x20071026
166 *cap = cfs_cap_pack(kcap[0]);
167 #elif defined(_KERNEL_CAPABILITY_VERSION) && _KERNEL_CAPABILITY_VERSION == 0x20080522
168 /* XXX lost high byte */
169 *cap = cfs_cap_pack(kcap.cap[0]);
171 #error "need correct _KERNEL_CAPABILITY_VERSION "
175 void cfs_kernel_cap_unpack(cfs_kernel_cap_t *kcap, cfs_cap_t cap)
177 #if defined (_LINUX_CAPABILITY_VERSION) && _LINUX_CAPABILITY_VERSION == 0x19980330
178 *kcap = cfs_cap_unpack(cap);
179 #elif defined (_LINUX_CAPABILITY_VERSION) && _LINUX_CAPABILITY_VERSION == 0x20071026
180 (*kcap)[0] = cfs_cap_unpack(cap);
181 #elif defined(_KERNEL_CAPABILITY_VERSION) && _KERNEL_CAPABILITY_VERSION == 0x20080522
182 kcap->cap[0] = cfs_cap_unpack(cap);
184 #error "need correct _KERNEL_CAPABILITY_VERSION "
188 cfs_cap_t cfs_curproc_cap_pack(void)
191 cfs_kernel_cap_pack(current_cap(), &cap);
195 void cfs_curproc_cap_unpack(cfs_cap_t cap)
198 if ((cred = prepare_creds())) {
199 cfs_kernel_cap_unpack(&cred->cap_effective, cap);
204 int cfs_capable(cfs_cap_t cap)
206 return capable(cfs_cap_unpack(cap));
209 EXPORT_SYMBOL(cfs_curproc_uid);
210 EXPORT_SYMBOL(cfs_curproc_pid);
211 EXPORT_SYMBOL(cfs_curproc_euid);
212 EXPORT_SYMBOL(cfs_curproc_gid);
213 EXPORT_SYMBOL(cfs_curproc_egid);
214 EXPORT_SYMBOL(cfs_curproc_fsuid);
215 EXPORT_SYMBOL(cfs_curproc_fsgid);
216 EXPORT_SYMBOL(cfs_curproc_umask);
217 EXPORT_SYMBOL(cfs_curproc_comm);
218 EXPORT_SYMBOL(cfs_curproc_groups_nr);
219 EXPORT_SYMBOL(cfs_curproc_groups_dump);
220 EXPORT_SYMBOL(cfs_curproc_is_in_groups);
221 EXPORT_SYMBOL(cfs_cap_raise);
222 EXPORT_SYMBOL(cfs_cap_lower);
223 EXPORT_SYMBOL(cfs_cap_raised);
224 EXPORT_SYMBOL(cfs_curproc_cap_pack);
225 EXPORT_SYMBOL(cfs_curproc_cap_unpack);
226 EXPORT_SYMBOL(cfs_capable);
230 * c-indentation-style: "K&R"