-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
*
- * lustre/obdclass/capa.c
- * Lustre Capability Hash Management
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * Copyright (c) 2005 Cluster File Systems, Inc.
- * Author: Lai Siyao<lsy@clusterfs.com>
+ * 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 file is part of Lustre, http://www.lustre.org.
+ * 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).
*
- * 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.
+ * 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
*
- * 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.
+ * 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.
*
- * 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.
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 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/obdclass/capa.c
+ *
+ * Lustre Capability Hash Management
+ *
+ * Author: Lai Siyao<lsy@clusterfs.com>
*/
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
#define DEBUG_SUBSYSTEM S_SEC
#define NR_CAPAHASH 32
#define CAPA_HASH_SIZE 3000 /* for MDS & OSS */
-cfs_mem_cache_t *capa_cachep = NULL;
+struct kmem_cache *capa_cachep;
#ifdef __KERNEL__
/* lock for capa hash/capa_list/fo_capa_keys */
-spinlock_t capa_lock = SPIN_LOCK_UNLOCKED;
+DEFINE_SPINLOCK(capa_lock);
struct list_head capa_list[CAPA_SITE_MAX];
struct hlist_head *init_capa_hash(void)
{
- struct hlist_head *hash;
- int nr_hash, i;
+ struct hlist_head *hash;
+ int nr_hash, i;
- OBD_ALLOC(hash, CFS_PAGE_SIZE);
- if (!hash)
- return NULL;
+ OBD_ALLOC(hash, PAGE_CACHE_SIZE);
+ if (!hash)
+ return NULL;
- nr_hash = CFS_PAGE_SIZE / sizeof(struct hlist_head);
- LASSERT(nr_hash > NR_CAPAHASH);
+ nr_hash = PAGE_CACHE_SIZE / sizeof(struct hlist_head);
+ LASSERT(nr_hash > NR_CAPAHASH);
- for (i = 0; i < NR_CAPAHASH; i++)
- INIT_HLIST_HEAD(hash + i);
- return hash;
+ for (i = 0; i < NR_CAPAHASH; i++)
+ INIT_HLIST_HEAD(hash + i);
+ return hash;
}
+EXPORT_SYMBOL(init_capa_hash);
#ifdef __KERNEL__
static inline int capa_on_server(struct obd_capa *ocapa)
static inline void capa_delete(struct obd_capa *ocapa)
{
- LASSERT(capa_on_server(ocapa));
- hlist_del(&ocapa->u.tgt.c_hash);
- list_del(&ocapa->c_list);
- capa_count[ocapa->c_site]--;
- free_capa(ocapa);
+ LASSERT(capa_on_server(ocapa));
+ hlist_del_init(&ocapa->u.tgt.c_hash);
+ list_del_init(&ocapa->c_list);
+ capa_count[ocapa->c_site]--;
+ /* release the ref when alloc */
+ capa_put(ocapa);
}
void cleanup_capa_hash(struct hlist_head *hash)
{
- int i;
- struct hlist_node *pos, *next;
- struct obd_capa *oc;
-
- spin_lock(&capa_lock);
- for (i = 0; i < NR_CAPAHASH; i++) {
- hlist_for_each_entry_safe(oc, pos, next, hash + i, u.tgt.c_hash)
- capa_delete(oc);
- }
- spin_unlock(&capa_lock);
-
- OBD_FREE(hash, CFS_PAGE_SIZE);
+ int i;
+ struct hlist_node *pos, *next;
+ struct obd_capa *oc;
+
+ spin_lock(&capa_lock);
+ for (i = 0; i < NR_CAPAHASH; i++) {
+ cfs_hlist_for_each_entry_safe(oc, pos, next, hash + i,
+ u.tgt.c_hash)
+ capa_delete(oc);
+ }
+ spin_unlock(&capa_lock);
+
+ OBD_FREE(hash, PAGE_CACHE_SIZE);
}
+EXPORT_SYMBOL(cleanup_capa_hash);
static inline int capa_hashfn(struct lu_fid *fid)
{
}
static struct obd_capa *find_capa(struct lustre_capa *capa,
- struct hlist_head *head, int alive)
+ struct hlist_head *head, int alive)
{
- struct hlist_node *pos;
+ struct hlist_node *pos;
struct obd_capa *ocapa;
int len = alive ? offsetof(struct lustre_capa, lc_keyid):sizeof(*capa);
- hlist_for_each_entry(ocapa, pos, head, u.tgt.c_hash) {
+ cfs_hlist_for_each_entry(ocapa, pos, head, u.tgt.c_hash) {
if (memcmp(&ocapa->c_capa, capa, len))
continue;
/* don't return one that will expire soon in this case */
#define LRU_CAPA_DELETE_COUNT 12
static inline void capa_delete_lru(struct list_head *head)
{
- struct obd_capa *ocapa;
- struct list_head *node = head->next;
- int count = 0;
-
- /* free LRU_CAPA_DELETE_COUNT unused capa from head */
- while (count++ < LRU_CAPA_DELETE_COUNT) {
- ocapa = list_entry(node, struct obd_capa, c_list);
- node = node->next;
- if (atomic_read(&ocapa->c_refc))
- continue;
-
- DEBUG_CAPA(D_SEC, &ocapa->c_capa, "free lru");
- capa_delete(ocapa);
- }
+ struct obd_capa *ocapa;
+ struct list_head *node = head->next;
+ int count = 0;
+
+ /* free LRU_CAPA_DELETE_COUNT unused capa from head */
+ while (count++ < LRU_CAPA_DELETE_COUNT) {
+ ocapa = list_entry(node, struct obd_capa, c_list);
+ node = node->next;
+ if (atomic_read(&ocapa->c_refc))
+ continue;
+
+ DEBUG_CAPA(D_SEC, &ocapa->c_capa, "free lru");
+ capa_delete(ocapa);
+ }
}
/* add or update */
struct obd_capa *capa_add(struct hlist_head *hash, struct lustre_capa *capa)
{
- struct hlist_head *head = hash + capa_hashfn(&capa->lc_fid);
+ struct hlist_head *head = hash + capa_hashfn(&capa->lc_fid);
struct obd_capa *ocapa, *old = NULL;
- struct list_head *list = &capa_list[CAPA_SITE_SERVER];
+ struct list_head *list = &capa_list[CAPA_SITE_SERVER];
ocapa = alloc_capa(CAPA_SITE_SERVER);
- if (!ocapa)
+ if (IS_ERR(ocapa))
return NULL;
- spin_lock(&capa_lock);
+ spin_lock(&capa_lock);
old = find_capa(capa, head, 0);
if (!old) {
ocapa->c_capa = *capa;
set_capa_expiry(ocapa);
- hlist_add_head(&ocapa->u.tgt.c_hash, head);
- list_add_tail(&ocapa->c_list, list);
- capa_count[CAPA_SITE_SERVER]++;
+ hlist_add_head(&ocapa->u.tgt.c_hash, head);
+ list_add_tail(&ocapa->c_list, list);
capa_get(ocapa);
-
+ capa_count[CAPA_SITE_SERVER]++;
if (capa_count[CAPA_SITE_SERVER] > CAPA_HASH_SIZE)
capa_delete_lru(list);
-
- DEBUG_CAPA(D_SEC, &ocapa->c_capa, "new");
-
- spin_unlock(&capa_lock);
- return ocapa;
- }
-
- capa_get(old);
- spin_unlock(&capa_lock);
-
- DEBUG_CAPA(D_SEC, &old->c_capa, "update");
-
- free_capa(ocapa);
- return old;
+ spin_unlock(&capa_lock);
+ return ocapa;
+ } else {
+ capa_get(old);
+ spin_unlock(&capa_lock);
+ capa_put(ocapa);
+ return old;
+ }
}
+EXPORT_SYMBOL(capa_add);
struct obd_capa *capa_lookup(struct hlist_head *hash, struct lustre_capa *capa,
- int alive)
+ int alive)
{
- struct obd_capa *ocapa;
+ struct obd_capa *ocapa;
- spin_lock(&capa_lock);
- ocapa = find_capa(capa, hash + capa_hashfn(&capa->lc_fid), alive);
- if (ocapa) {
- list_move_tail(&ocapa->c_list, &capa_list[CAPA_SITE_SERVER]);
- capa_get(ocapa);
- }
- spin_unlock(&capa_lock);
+ spin_lock(&capa_lock);
+ ocapa = find_capa(capa, hash + capa_hashfn(&capa->lc_fid), alive);
+ if (ocapa) {
+ list_move_tail(&ocapa->c_list, &capa_list[CAPA_SITE_SERVER]);
+ capa_get(ocapa);
+ }
+ spin_unlock(&capa_lock);
- return ocapa;
+ return ocapa;
}
+EXPORT_SYMBOL(capa_lookup);
int capa_hmac(__u8 *hmac, struct lustre_capa *capa, __u8 *key)
{
- struct ll_crypto_hash *tfm;
+ struct crypto_hash *tfm;
struct capa_hmac_alg *alg;
int keylen;
- struct scatterlist sl = {
- .page = virt_to_page(capa),
- .offset = (unsigned long)(capa) % CFS_PAGE_SIZE,
- .length = offsetof(struct lustre_capa, lc_hmac),
- };
+ struct scatterlist sl;
if (capa_alg(capa) != CAPA_HMAC_ALG_SHA1) {
CERROR("unknown capability hmac algorithm!\n");
alg = &capa_hmac_algs[capa_alg(capa)];
- tfm = ll_crypto_alloc_hash(alg->ha_name, 0, 0);
- if (!tfm) {
+ tfm = crypto_alloc_hash(alg->ha_name, 0, 0);
+ if (IS_ERR(tfm)) {
CERROR("crypto_alloc_tfm failed, check whether your kernel"
"has crypto support!\n");
- return -ENOMEM;
+ return PTR_ERR(tfm);
}
keylen = alg->ha_keylen;
+ sg_init_table(&sl, 1);
+ sg_set_page(&sl, virt_to_page(capa),
+ offsetof(struct lustre_capa, lc_hmac),
+ (unsigned long)(capa) % PAGE_CACHE_SIZE);
+
ll_crypto_hmac(tfm, key, &keylen, &sl, sl.length, hmac);
- ll_crypto_free_hash(tfm);
+ crypto_free_hash(tfm);
return 0;
}
+EXPORT_SYMBOL(capa_hmac);
+
+int capa_encrypt_id(__u32 *d, __u32 *s, __u8 *key, int keylen)
+{
+ struct crypto_blkcipher *tfm;
+ struct scatterlist sd;
+ struct scatterlist ss;
+ struct blkcipher_desc desc;
+ unsigned int min;
+ int rc;
+ char alg[CRYPTO_MAX_ALG_NAME+1] = "aes";
+ ENTRY;
+
+ /* passing "aes" in a variable instead of a constant string keeps gcc
+ * 4.3.2 happy */
+ tfm = crypto_alloc_blkcipher(alg, 0, 0 );
+ if (IS_ERR(tfm)) {
+ CERROR("failed to load transform for aes\n");
+ RETURN(PTR_ERR(tfm));
+ }
+
+ min = ll_crypto_tfm_alg_min_keysize(tfm);
+ if (keylen < min) {
+ CERROR("keylen at least %d bits for aes\n", min * 8);
+ GOTO(out, rc = -EINVAL);
+ }
+
+ rc = crypto_blkcipher_setkey(tfm, key, min);
+ if (rc) {
+ CERROR("failed to setting key for aes\n");
+ GOTO(out, rc);
+ }
+
+ sg_init_table(&sd, 1);
+ sg_set_page(&sd, virt_to_page(d), 16,
+ (unsigned long)(d) % PAGE_CACHE_SIZE);
+
+ sg_init_table(&ss, 1);
+ sg_set_page(&ss, virt_to_page(s), 16,
+ (unsigned long)(s) % PAGE_CACHE_SIZE);
+ desc.tfm = tfm;
+ desc.info = NULL;
+ desc.flags = 0;
+ rc = crypto_blkcipher_encrypt(&desc, &sd, &ss, 16);
+ if (rc) {
+ CERROR("failed to encrypt for aes\n");
+ GOTO(out, rc);
+ }
+
+ EXIT;
+
+out:
+ crypto_free_blkcipher(tfm);
+ return rc;
+}
+EXPORT_SYMBOL(capa_encrypt_id);
+
+int capa_decrypt_id(__u32 *d, __u32 *s, __u8 *key, int keylen)
+{
+ struct crypto_blkcipher *tfm;
+ struct scatterlist sd;
+ struct scatterlist ss;
+ struct blkcipher_desc desc;
+ unsigned int min;
+ int rc;
+ char alg[CRYPTO_MAX_ALG_NAME+1] = "aes";
+ ENTRY;
+
+ /* passing "aes" in a variable instead of a constant string keeps gcc
+ * 4.3.2 happy */
+ tfm = crypto_alloc_blkcipher(alg, 0, 0 );
+ if (IS_ERR(tfm)) {
+ CERROR("failed to load transform for aes\n");
+ RETURN(PTR_ERR(tfm));
+ }
+
+ min = ll_crypto_tfm_alg_min_keysize(tfm);
+ if (keylen < min) {
+ CERROR("keylen at least %d bits for aes\n", min * 8);
+ GOTO(out, rc = -EINVAL);
+ }
+
+ rc = crypto_blkcipher_setkey(tfm, key, min);
+ if (rc) {
+ CERROR("failed to setting key for aes\n");
+ GOTO(out, rc);
+ }
+
+ sg_init_table(&sd, 1);
+ sg_set_page(&sd, virt_to_page(d), 16,
+ (unsigned long)(d) % PAGE_CACHE_SIZE);
+
+ sg_init_table(&ss, 1);
+ sg_set_page(&ss, virt_to_page(s), 16,
+ (unsigned long)(s) % PAGE_CACHE_SIZE);
+
+ desc.tfm = tfm;
+ desc.info = NULL;
+ desc.flags = 0;
+ rc = crypto_blkcipher_decrypt(&desc, &sd, &ss, 16);
+ if (rc) {
+ CERROR("failed to decrypt for aes\n");
+ GOTO(out, rc);
+ }
+
+ EXIT;
+
+out:
+ crypto_free_blkcipher(tfm);
+ return rc;
+}
+EXPORT_SYMBOL(capa_decrypt_id);
#endif
void capa_cpy(void *capa, struct obd_capa *ocapa)
{
- spin_lock(&ocapa->c_lock);
- *(struct lustre_capa *)capa = ocapa->c_capa;
- spin_unlock(&ocapa->c_lock);
+ spin_lock(&ocapa->c_lock);
+ *(struct lustre_capa *)capa = ocapa->c_capa;
+ spin_unlock(&ocapa->c_lock);
}
+EXPORT_SYMBOL(capa_cpy);
-char *dump_capa_content(char *buf, char *key, int len)
+void _debug_capa(struct lustre_capa *c,
+ struct libcfs_debug_msg_data *msgdata,
+ const char *fmt, ... )
{
- int i, n = 0;
-
- for (i = 0; i < len; i++)
- n += sprintf(buf + n, "%02x", (unsigned char) key[i]);
- return buf;
+ va_list args;
+ va_start(args, fmt);
+ libcfs_debug_vmsg2(msgdata, fmt, args,
+ " capability@%p fid "DFID" opc "LPX64" uid "LPU64
+ " gid "LPU64" flags %u alg %d keyid %u timeout %u "
+ "expiry %u\n", c, PFID(capa_fid(c)), capa_opc(c),
+ capa_uid(c), capa_gid(c), capa_flags(c),
+ capa_alg(c), capa_keyid(c), capa_timeout(c),
+ capa_expiry(c));
+ va_end(args);
}
+EXPORT_SYMBOL(_debug_capa);
-EXPORT_SYMBOL(init_capa_hash);
-EXPORT_SYMBOL(cleanup_capa_hash);
+/*
+ * context key constructor/destructor:
+ * lu_capainfo_key_init, lu_capainfo_key_fini
+ */
+LU_KEY_INIT_FINI(lu_capainfo, struct lu_capainfo);
-EXPORT_SYMBOL(capa_add);
-EXPORT_SYMBOL(capa_lookup);
+struct lu_context_key lu_capainfo_key = {
+ .lct_tags = LCT_SERVER_SESSION,
+ .lct_init = lu_capainfo_key_init,
+ .lct_fini = lu_capainfo_key_fini
+};
-EXPORT_SYMBOL(capa_hmac);
-EXPORT_SYMBOL(capa_cpy);
+struct lu_capainfo *lu_capainfo_get(const struct lu_env *env)
+{
+ /* NB, in mdt_init0 */
+ if (env->le_ses == NULL)
+ return NULL;
+ return lu_context_key_get(env->le_ses, &lu_capainfo_key);
+}
+EXPORT_SYMBOL(lu_capainfo_get);
-EXPORT_SYMBOL(dump_capa_content);
+/**
+ * Initialization of lu_capainfo_key data.
+ */
+int lu_capainfo_init(void)
+{
+ int rc;
+
+ LU_CONTEXT_KEY_INIT(&lu_capainfo_key);
+ rc = lu_context_key_register(&lu_capainfo_key);
+ return rc;
+}
+
+/**
+ * Dual to lu_capainfo_init().
+ */
+void lu_capainfo_fini(void)
+{
+ lu_context_key_degister(&lu_capainfo_key);
+}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff