| /* |
| * CDDL HEADER START |
| * |
| * The contents of this file are subject to the terms of the |
| * Common Development and Distribution License (the "License"). |
| * You may not use this file except in compliance with the License. |
| * |
| * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
| * or http://www.opensolaris.org/os/licensing. |
| * See the License for the specific language governing permissions |
| * and limitations under the License. |
| * |
| * When distributing Covered Code, include this CDDL HEADER in each |
| * file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
| * If applicable, add the following below this CDDL HEADER, with the |
| * fields enclosed by brackets "[]" replaced with your own identifying |
| * information: Portions Copyright [yyyy] [name of copyright owner] |
| * |
| * CDDL HEADER END |
| */ |
| /* |
| * Copyright 2008 Sun Microsystems, Inc. All rights reserved. |
| * Use is subject to license terms. |
| */ |
| |
| #include <sys/zfs_context.h> |
| #include <sys/crypto/common.h> |
| #include <sys/crypto/api.h> |
| #include <sys/crypto/impl.h> |
| #include <sys/crypto/sched_impl.h> |
| |
| /* |
| * All event subscribers are put on a list. kcf_notify_list_lock |
| * protects changes to this list. |
| * |
| * The following locking order is maintained in the code - The |
| * global kcf_notify_list_lock followed by the individual lock |
| * in a kcf_ntfy_elem structure (kn_lock). |
| */ |
| kmutex_t ntfy_list_lock; |
| kcondvar_t ntfy_list_cv; /* cv the service thread waits on */ |
| static kcf_ntfy_elem_t *ntfy_list_head; |
| |
| /* |
| * crypto_mech2id() |
| * |
| * Arguments: |
| * . mechname: A null-terminated string identifying the mechanism name. |
| * |
| * Description: |
| * Walks the mechanisms tables, looking for an entry that matches the |
| * mechname. Once it find it, it builds the 64-bit mech_type and returns |
| * it. If there are no hardware or software providers for the mechanism, |
| * but there is an unloaded software provider, this routine will attempt |
| * to load it. |
| * |
| * Context: |
| * Process and interruption. |
| * |
| * Returns: |
| * The unique mechanism identified by 'mechname', if found. |
| * CRYPTO_MECH_INVALID otherwise. |
| */ |
| crypto_mech_type_t |
| crypto_mech2id(char *mechname) |
| { |
| return (crypto_mech2id_common(mechname, B_TRUE)); |
| } |
| |
| /* |
| * We walk the notification list and do the callbacks. |
| */ |
| void |
| kcf_walk_ntfylist(uint32_t event, void *event_arg) |
| { |
| kcf_ntfy_elem_t *nep; |
| int nelem = 0; |
| |
| mutex_enter(&ntfy_list_lock); |
| |
| /* |
| * Count how many clients are on the notification list. We need |
| * this count to ensure that clients which joined the list after we |
| * have started this walk, are not wrongly notified. |
| */ |
| for (nep = ntfy_list_head; nep != NULL; nep = nep->kn_next) |
| nelem++; |
| |
| for (nep = ntfy_list_head; (nep != NULL && nelem); nep = nep->kn_next) { |
| nelem--; |
| |
| /* |
| * Check if this client is interested in the |
| * event. |
| */ |
| if (!(nep->kn_event_mask & event)) |
| continue; |
| |
| mutex_enter(&nep->kn_lock); |
| nep->kn_state = NTFY_RUNNING; |
| mutex_exit(&nep->kn_lock); |
| mutex_exit(&ntfy_list_lock); |
| |
| /* |
| * We invoke the callback routine with no locks held. Another |
| * client could have joined the list meanwhile. This is fine |
| * as we maintain nelem as stated above. The NULL check in the |
| * for loop guards against shrinkage. Also, any callers of |
| * crypto_unnotify_events() at this point cv_wait till kn_state |
| * changes to NTFY_WAITING. Hence, nep is assured to be valid. |
| */ |
| (*nep->kn_func)(event, event_arg); |
| |
| mutex_enter(&nep->kn_lock); |
| nep->kn_state = NTFY_WAITING; |
| cv_broadcast(&nep->kn_cv); |
| mutex_exit(&nep->kn_lock); |
| |
| mutex_enter(&ntfy_list_lock); |
| } |
| |
| mutex_exit(&ntfy_list_lock); |
| } |
| |
| #if defined(_KERNEL) |
| EXPORT_SYMBOL(crypto_mech2id); |
| #endif |