linux-curproc.c

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/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
 * vim:expandtab:shiftwidth=8:tabstop=8:
 *
 * Lustre curproc API implementation for Linux kernel
 *
 * Copyright (C) 2004 Cluster File Systems, Inc.
 * Author: Nikita Danilov <[e-mail]>
 *
 * This file is part of Lustre, http://www.lustre.org.
 *
 * Lustre is free software; you can redistribute it and/or modify it under the
 * terms of version 2 of the GNU General Public License as published by the
 * Free Software Foundation. Lustre is distributed in the hope that it will be
 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
 * Public License for more details. You should have received a copy of the GNU
 * General Public License along with Lustre; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/sched.h>

#define DEBUG_SUBSYSTEM S_LNET

#include <libcfs/libcfs.h>
#include <libcfs/kp30.h>

/*
 * Implementation of cfs_curproc API (see portals/include/libcfs/curproc.h)
 * for Linux kernel.
 */

uid_t  cfs_curproc_uid(void)
{
        return current->uid;
}

gid_t  cfs_curproc_gid(void)
{
        return current->gid;
}

uid_t  cfs_curproc_fsuid(void)
{
        return current->fsuid;
}

gid_t  cfs_curproc_fsgid(void)
{
        return current->fsgid;
}

pid_t  cfs_curproc_pid(void)
{
        return current->pid;
}

int    cfs_curproc_groups_nr(void)
{
        int nr;

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,4)
        task_lock(current);
        nr = current->group_info->ngroups;
        task_unlock(current);
#else
        nr = current->ngroups;
#endif
        return nr;
}

void   cfs_curproc_groups_dump(gid_t *array, int size)
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,4)
        task_lock(current);
        size = min_t(int, size, current->group_info->ngroups);
        memcpy(array, current->group_info->blocks[0], size * sizeof(__u32));
        task_unlock(current);
#else
        LASSERT(size <= NGROUPS);
        size = min_t(int, size, current->ngroups);
        memcpy(array, current->groups, size * sizeof(__u32));
#endif
}


int    cfs_curproc_is_in_groups(gid_t gid)
{
        return in_group_p(gid);
}

mode_t cfs_curproc_umask(void)
{
        return current->fs->umask;
}

char  *cfs_curproc_comm(void)
{
        return current->comm;
}

cfs_kernel_cap_t cfs_curproc_cap_get(void)
{
        return current->cap_effective;
}

void cfs_curproc_cap_set(cfs_kernel_cap_t cap)
{
        current->cap_effective = cap;
}

EXPORT_SYMBOL(cfs_curproc_uid);
EXPORT_SYMBOL(cfs_curproc_pid);
EXPORT_SYMBOL(cfs_curproc_gid);
EXPORT_SYMBOL(cfs_curproc_fsuid);
EXPORT_SYMBOL(cfs_curproc_fsgid);
EXPORT_SYMBOL(cfs_curproc_umask);
EXPORT_SYMBOL(cfs_curproc_comm);
EXPORT_SYMBOL(cfs_curproc_groups_nr);
EXPORT_SYMBOL(cfs_curproc_groups_dump);
EXPORT_SYMBOL(cfs_curproc_is_in_groups);
EXPORT_SYMBOL(cfs_curproc_cap_get);
EXPORT_SYMBOL(cfs_curproc_cap_set);

/*
 * Local variables:
 * c-indentation-style: "K&R"
 * c-basic-offset: 8
 * tab-width: 8
 * fill-column: 80
 * scroll-step: 1
 * End:
 */