lustre_idmap.h 3.27 KiB
/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 only,
* as published by the Free Software Foundation.
*
* This program 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 version 2 for more details (a copy is included
* in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
*
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* CA 95054 USA or visit www.sun.com if you need additional information or
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/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved
* Use is subject to license terms.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*
* lustre/lustre/include/lustre_idmap.h
*
* MDS data structures.
* See also lustre_idl.h for wire formats of requests.
*/
#ifndef _LUSTRE_IDMAP_H
#define _LUSTRE_IDMAP_H
#include <md_object.h>
#define CFS_NGROUPS_PER_BLOCK ((int)(CFS_PAGE_SIZE / sizeof(gid_t)))
#define CFS_GROUP_AT(gi, i) \
((gi)->blocks[(i) / CFS_NGROUPS_PER_BLOCK][(i) % CFS_NGROUPS_PER_BLOCK])
enum {
CFS_IC_NOTHING = 0, /* convert nothing */
CFS_IC_ALL = 1, /* convert all items */
CFS_IC_MAPPED = 2, /* convert mapped uid/gid */
CFS_IC_UNMAPPED = 3 /* convert unmapped uid/gid */
};
#define CFS_IDMAP_NOTFOUND (-1)
#define CFS_IDMAP_HASHSIZE 32
enum lustre_idmap_idx {
RMT_UIDMAP_IDX,
LCL_UIDMAP_IDX,
RMT_GIDMAP_IDX,
LCL_GIDMAP_IDX,
CFS_IDMAP_N_HASHES
};
struct lustre_idmap_table {
spinlock_t lit_lock;
struct list_head lit_idmaps[CFS_IDMAP_N_HASHES][CFS_IDMAP_HASHSIZE];
};
extern void lustre_groups_from_list(struct group_info *ginfo, gid_t *glist);
extern void lustre_groups_sort(struct group_info *group_info);
extern int lustre_in_group_p(struct md_ucred *mu, gid_t grp);
extern int lustre_idmap_add(struct lustre_idmap_table *t,
uid_t ruid, uid_t luid,
gid_t rgid, gid_t lgid);
extern int lustre_idmap_del(struct lustre_idmap_table *t,
uid_t ruid, uid_t luid,
gid_t rgid, gid_t lgid);
extern int lustre_idmap_lookup_uid(struct md_ucred *mu,
struct lustre_idmap_table *t,
int reverse, uid_t uid);
extern int lustre_idmap_lookup_gid(struct md_ucred *mu,
struct lustre_idmap_table *t,
int reverse, gid_t gid);
extern struct lustre_idmap_table *lustre_idmap_init(void);
extern void lustre_idmap_fini(struct lustre_idmap_table *t);
#endif