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* 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
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
* GPL HEADER END
*/
/*
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2012, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*
* lustre/include/lustre_capa.h
*
* Author: Lai Siyao <lsy@clusterfs.com>
*/
#ifndef __LINUX_CAPA_H_
#define __LINUX_CAPA_H_
/** \defgroup capa capa
*
* @{
*/
/*
* capability
*/
#include <linux/crypto.h>
#include "lustre/lustre_idl.h"
#define CAPA_TIMEOUT 1800 /* sec, == 30 min */
#define CAPA_KEY_TIMEOUT (24 * 60 * 60) /* sec, == 1 days */
struct capa_hmac_alg {
const char *ha_name;
int ha_len;
int ha_keylen;
};
#define DEF_CAPA_HMAC_ALG(name, type, len, keylen) \
[CAPA_HMAC_ALG_ ## type] = { \
.ha_name = name, \
.ha_len = len, \
.ha_keylen = keylen, \
}
struct client_capa {
struct inode *inode;
struct list_head lli_list; /* link to lli_oss_capas */
};
struct target_capa {
struct hlist_node c_hash; /* link to capa hash */
};
struct obd_capa {
struct list_head c_list; /* link to capa_list */
struct lustre_capa c_capa; /* capa */
atomic_t c_refc; /* ref count */
unsigned long c_expiry; /* jiffies */
spinlock_t c_lock; /* protect capa content */
int c_site;
union {
struct client_capa cli;
struct target_capa tgt;
} u;
};
enum {
CAPA_SITE_CLIENT = 0,
CAPA_SITE_SERVER,
CAPA_SITE_MAX
};
static inline struct lu_fid *capa_fid(struct lustre_capa *capa)
{
return &capa->lc_fid;
}
static inline __u64 capa_opc(struct lustre_capa *capa)
{
return capa->lc_opc;
}
static inline __u64 capa_uid(struct lustre_capa *capa)
{
return capa->lc_uid;
}
static inline __u64 capa_gid(struct lustre_capa *capa)
{
return capa->lc_gid;
}
static inline __u32 capa_flags(struct lustre_capa *capa)
{
return capa->lc_flags & 0xffffff;
}
static inline __u32 capa_alg(struct lustre_capa *capa)
{
return (capa->lc_flags >> 24);
}
static inline __u32 capa_keyid(struct lustre_capa *capa)
{
return capa->lc_keyid;
}
static inline __u64 capa_key_seq(struct lustre_capa_key *key)
{
return key->lk_seq;
}
static inline __u32 capa_key_keyid(struct lustre_capa_key *key)
{
return key->lk_keyid;
}
static inline __u32 capa_timeout(struct lustre_capa *capa)
{
return capa->lc_timeout;
}
static inline __u32 capa_expiry(struct lustre_capa *capa)
{
return capa->lc_expiry;
}
void _debug_capa(struct lustre_capa *, struct libcfs_debug_msg_data *,
const char *fmt, ...);
#define DEBUG_CAPA(level, capa, fmt, args...) \
do { \
if (((level) & D_CANTMASK) != 0 || \
((libcfs_debug & (level)) != 0 && \
(libcfs_subsystem_debug & DEBUG_SUBSYSTEM) != 0)) { \
LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, level, NULL); \
_debug_capa((capa), &msgdata, fmt, ##args); \
} \
} while (0)
#define DEBUG_CAPA_KEY(level, k, fmt, args...) \
do { \
CDEBUG(level, fmt " capability key@%p seq %llu keyid %u\n", \
##args, k, capa_key_seq(k), capa_key_keyid(k)); \
} while (0)
typedef int (* renew_capa_cb_t)(struct obd_capa *, struct lustre_capa *);
/* obdclass/capa.c */
extern struct list_head capa_list[];
extern spinlock_t capa_lock;
extern int capa_count[];
extern struct kmem_cache *capa_cachep;
struct hlist_head *init_capa_hash(void);
void cleanup_capa_hash(struct hlist_head *hash);
struct obd_capa *capa_add(struct hlist_head *hash,
struct lustre_capa *capa);
struct obd_capa *capa_lookup(struct hlist_head *hash,
struct lustre_capa *capa, int alive);
int capa_hmac(__u8 *hmac, struct lustre_capa *capa, __u8 *key);
int capa_encrypt_id(__u32 *d, __u32 *s, __u8 *key, int keylen);
int capa_decrypt_id(__u32 *d, __u32 *s, __u8 *key, int keylen);
void capa_cpy(void *dst, struct obd_capa *ocapa);
static inline struct obd_capa *alloc_capa(int site)
{
struct obd_capa *ocapa;
if (unlikely(site != CAPA_SITE_CLIENT && site != CAPA_SITE_SERVER))
return ERR_PTR(-EINVAL);
OBD_SLAB_ALLOC_PTR(ocapa, capa_cachep);
if (unlikely(!ocapa))
return ERR_PTR(-ENOMEM);
INIT_LIST_HEAD(&ocapa->c_list);
atomic_set(&ocapa->c_refc, 1);
spin_lock_init(&ocapa->c_lock);
ocapa->c_site = site;
if (ocapa->c_site == CAPA_SITE_CLIENT)
INIT_LIST_HEAD(&ocapa->u.cli.lli_list);
else
INIT_HLIST_NODE(&ocapa->u.tgt.c_hash);
return ocapa;
}
static inline struct obd_capa *capa_get(struct obd_capa *ocapa)
{
if (!ocapa)
return NULL;
atomic_inc(&ocapa->c_refc);
return ocapa;
}
static inline void capa_put(struct obd_capa *ocapa)
{
if (!ocapa)
return;
if (atomic_read(&ocapa->c_refc) == 0) {
DEBUG_CAPA(D_ERROR, &ocapa->c_capa, "refc is 0 for");
LBUG();
}
if (atomic_dec_and_test(&ocapa->c_refc)) {
LASSERT(list_empty(&ocapa->c_list));
if (ocapa->c_site == CAPA_SITE_CLIENT) {
LASSERT(list_empty(&ocapa->u.cli.lli_list));
} else {
struct hlist_node *hnode;
hnode = &ocapa->u.tgt.c_hash;
LASSERT(!hnode->next && !hnode->pprev);
}
OBD_SLAB_FREE(ocapa, capa_cachep, sizeof(*ocapa));
}
}
static inline int open_flags_to_accmode(int flags)
{
int mode = flags;
if ((mode + 1) & O_ACCMODE)
mode++;
if (mode & O_TRUNC)
mode |= 2;
return mode;
}
static inline __u64 capa_open_opc(int mode)
{
return mode & FMODE_WRITE ? CAPA_OPC_OSS_WRITE : CAPA_OPC_OSS_READ;
}
static inline void set_capa_expiry(struct obd_capa *ocapa)
{
unsigned long expiry = cfs_time_sub((unsigned long)ocapa->c_capa.lc_expiry,
get_seconds());
ocapa->c_expiry = cfs_time_add(cfs_time_current(),
cfs_time_seconds(expiry));
}
static inline int capa_is_expired_sec(struct lustre_capa *capa)
{
return (capa->lc_expiry - get_seconds() <= 0);
}
static inline int capa_is_expired(struct obd_capa *ocapa)
{
return time_before_eq(ocapa->c_expiry, cfs_time_current());
}
static inline int capa_opc_supported(struct lustre_capa *capa, __u64 opc)
{
return (capa_opc(capa) & opc) == opc;
}
struct filter_capa_key {
struct list_head k_list;
struct lustre_capa_key k_key;
};
enum {
LC_ID_NONE = 0,
LC_ID_PLAIN = 1,
LC_ID_CONVERT = 2
};
#define BYPASS_CAPA (struct lustre_capa *)ERR_PTR(-ENOENT)
/** @} capa */
#endif /* __LINUX_CAPA_H_ */
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