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>
45 #define DEBUG_SUBSYSTEM S_LNET
47 #include <libcfs/libcfs.h>
50 * Implementation of cfs_curproc API (see portals/include/libcfs/curproc.h)
54 uid_t cfs_curproc_uid(void)
59 gid_t cfs_curproc_gid(void)
64 uid_t cfs_curproc_fsuid(void)
66 return current->fsuid;
69 gid_t cfs_curproc_fsgid(void)
71 return current->fsgid;
74 pid_t cfs_curproc_pid(void)
79 int cfs_curproc_groups_nr(void)
83 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,4)
85 nr = current->group_info->ngroups;
88 nr = current->ngroups;
93 void cfs_curproc_groups_dump(gid_t *array, int size)
95 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,4)
97 size = min_t(int, size, current->group_info->ngroups);
98 memcpy(array, current->group_info->blocks[0], size * sizeof(__u32));
101 LASSERT(size <= NGROUPS);
102 size = min_t(int, size, current->ngroups);
103 memcpy(array, current->groups, size * sizeof(__u32));
108 int cfs_curproc_is_in_groups(gid_t gid)
110 return in_group_p(gid);
113 mode_t cfs_curproc_umask(void)
115 return current->fs->umask;
118 char *cfs_curproc_comm(void)
120 return current->comm;
123 /* Currently all the CFS_CAP_* defines match CAP_* ones. */
124 #define cfs_cap_pack(cap) (cap)
125 #define cfs_cap_unpack(cap) (cap)
127 void cfs_cap_raise(cfs_cap_t cap)
129 cap_raise(cfs_current()->cap_effective, cfs_cap_unpack(cap));
132 void cfs_cap_lower(cfs_cap_t cap)
134 cap_lower(cfs_current()->cap_effective, cfs_cap_unpack(cap));
137 int cfs_cap_raised(cfs_cap_t cap)
139 return cap_raised(cfs_current()->cap_effective, cfs_cap_unpack(cap));
142 cfs_cap_t cfs_curproc_cap_pack(void)
144 #if defined (_LINUX_CAPABILITY_VERSION) && _LINUX_CAPABILITY_VERSION == 0x19980330
145 return cfs_cap_pack(current->cap_effective);
146 #elif defined (_LINUX_CAPABILITY_VERSION) && _LINUX_CAPABILITY_VERSION == 0x20071026
147 return cfs_cap_pack(current->cap_effective[0]);
148 #elif defined(_KERNEL_CAPABILITY_VERSION) && _KERNEL_CAPABILITY_VERSION == 0x20080522
149 /* XXX lost high byte */
150 return cfs_cap_pack(current->cap_effective.cap[0]);
152 #error "need correct _KERNEL_CAPABILITY_VERSION "
156 void cfs_curproc_cap_unpack(cfs_cap_t cap)
158 #if defined (_LINUX_CAPABILITY_VERSION) && _LINUX_CAPABILITY_VERSION == 0x19980330
159 current->cap_effective = cfs_cap_unpack(cap);
160 #elif defined (_LINUX_CAPABILITY_VERSION) && _LINUX_CAPABILITY_VERSION == 0x20071026
161 current->cap_effective[0] = cfs_cap_unpack(cap);
162 #elif defined(_KERNEL_CAPABILITY_VERSION) && _KERNEL_CAPABILITY_VERSION == 0x20080522
163 current->cap_effective.cap[0] = cfs_cap_unpack(cap);
165 #error "need correct _KERNEL_CAPABILITY_VERSION "
169 int cfs_capable(cfs_cap_t cap)
171 return capable(cfs_cap_unpack(cap));
174 EXPORT_SYMBOL(cfs_curproc_uid);
175 EXPORT_SYMBOL(cfs_curproc_pid);
176 EXPORT_SYMBOL(cfs_curproc_gid);
177 EXPORT_SYMBOL(cfs_curproc_fsuid);
178 EXPORT_SYMBOL(cfs_curproc_fsgid);
179 EXPORT_SYMBOL(cfs_curproc_umask);
180 EXPORT_SYMBOL(cfs_curproc_comm);
181 EXPORT_SYMBOL(cfs_curproc_groups_nr);
182 EXPORT_SYMBOL(cfs_curproc_groups_dump);
183 EXPORT_SYMBOL(cfs_curproc_is_in_groups);
184 EXPORT_SYMBOL(cfs_cap_raise);
185 EXPORT_SYMBOL(cfs_cap_lower);
186 EXPORT_SYMBOL(cfs_cap_raised);
187 EXPORT_SYMBOL(cfs_curproc_cap_pack);
188 EXPORT_SYMBOL(cfs_curproc_cap_unpack);
189 EXPORT_SYMBOL(cfs_capable);
193 * c-indentation-style: "K&R"