+++ /dev/null
-/*-
- * Linux port done by David McCullough <david_mccullough@mcafee.com>
- * Copyright (C) 2006-2010 David McCullough
- * Copyright (C) 2004-2005 Intel Corporation.
- * The license and original author are listed below.
- *
- * Redistribution and use in source and binary forms, with or without
- * Copyright (c) 2002-2006 Sam Leffler. All rights reserved.
- *
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#if 0
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/sys/opencrypto/crypto.c,v 1.27 2007/03/21 03:42:51 sam Exp $");
-#endif
-
-/*
- * Cryptographic Subsystem.
- *
- * This code is derived from the Openbsd Cryptographic Framework (OCF)
- * that has the copyright shown below. Very little of the original
- * code remains.
- */
-/*-
- * The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu)
- *
- * This code was written by Angelos D. Keromytis in Athens, Greece, in
- * February 2000. Network Security Technologies Inc. (NSTI) kindly
- * supported the development of this code.
- *
- * Copyright (c) 2000, 2001 Angelos D. Keromytis
- *
- * Permission to use, copy, and modify this software with or without fee
- * is hereby granted, provided that this entire notice is included in
- * all source code copies of any software which is or includes a copy or
- * modification of this software.
- *
- * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
- * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
- * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
- * PURPOSE.
- *
-__FBSDID("$FreeBSD: src/sys/opencrypto/crypto.c,v 1.16 2005/01/07 02:29:16 imp Exp $");
- */
-
-
-#ifndef AUTOCONF_INCLUDED
-#include <linux/config.h>
-#endif
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/list.h>
-#include <linux/slab.h>
-#include <linux/wait.h>
-#include <linux/sched.h>
-#include <linux/spinlock.h>
-#include <linux/version.h>
-#include <cryptodev.h>
-
-/*
- * keep track of whether or not we have been initialised, a big
- * issue if we are linked into the kernel and a driver gets started before
- * us
- */
-static int crypto_initted = 0;
-
-/*
- * Crypto drivers register themselves by allocating a slot in the
- * crypto_drivers table with crypto_get_driverid() and then registering
- * each algorithm they support with crypto_register() and crypto_kregister().
- */
-
-/*
- * lock on driver table
- * we track its state as spin_is_locked does not do anything on non-SMP boxes
- */
-static spinlock_t crypto_drivers_lock;
-static int crypto_drivers_locked; /* for non-SMP boxes */
-
-#define CRYPTO_DRIVER_LOCK() \
- ({ \
- spin_lock_irqsave(&crypto_drivers_lock, d_flags); \
- crypto_drivers_locked = 1; \
- dprintk("%s,%d: DRIVER_LOCK()\n", __FILE__, __LINE__); \
- })
-#define CRYPTO_DRIVER_UNLOCK() \
- ({ \
- dprintk("%s,%d: DRIVER_UNLOCK()\n", __FILE__, __LINE__); \
- crypto_drivers_locked = 0; \
- spin_unlock_irqrestore(&crypto_drivers_lock, d_flags); \
- })
-#define CRYPTO_DRIVER_ASSERT() \
- ({ \
- if (!crypto_drivers_locked) { \
- dprintk("%s,%d: DRIVER_ASSERT!\n", __FILE__, __LINE__); \
- } \
- })
-
-/*
- * Crypto device/driver capabilities structure.
- *
- * Synchronization:
- * (d) - protected by CRYPTO_DRIVER_LOCK()
- * (q) - protected by CRYPTO_Q_LOCK()
- * Not tagged fields are read-only.
- */
-struct cryptocap {
- device_t cc_dev; /* (d) device/driver */
- u_int32_t cc_sessions; /* (d) # of sessions */
- u_int32_t cc_koperations; /* (d) # os asym operations */
- /*
- * Largest possible operator length (in bits) for each type of
- * encryption algorithm. XXX not used
- */
- u_int16_t cc_max_op_len[CRYPTO_ALGORITHM_MAX + 1];
- u_int8_t cc_alg[CRYPTO_ALGORITHM_MAX + 1];
- u_int8_t cc_kalg[CRK_ALGORITHM_MAX + 1];
-
- int cc_flags; /* (d) flags */
-#define CRYPTOCAP_F_CLEANUP 0x80000000 /* needs resource cleanup */
- int cc_qblocked; /* (q) symmetric q blocked */
- int cc_kqblocked; /* (q) asymmetric q blocked */
-
- int cc_unqblocked; /* (q) symmetric q blocked */
- int cc_unkqblocked; /* (q) asymmetric q blocked */
-};
-static struct cryptocap *crypto_drivers = NULL;
-static int crypto_drivers_num = 0;
-
-/*
- * There are two queues for crypto requests; one for symmetric (e.g.
- * cipher) operations and one for asymmetric (e.g. MOD)operations.
- * A single mutex is used to lock access to both queues. We could
- * have one per-queue but having one simplifies handling of block/unblock
- * operations.
- */
-static int crp_sleep = 0;
-static LIST_HEAD(crp_q); /* request queues */
-static LIST_HEAD(crp_kq);
-
-static spinlock_t crypto_q_lock;
-
-int crypto_all_qblocked = 0; /* protect with Q_LOCK */
-module_param(crypto_all_qblocked, int, 0444);
-MODULE_PARM_DESC(crypto_all_qblocked, "Are all crypto queues blocked");
-
-int crypto_all_kqblocked = 0; /* protect with Q_LOCK */
-module_param(crypto_all_kqblocked, int, 0444);
-MODULE_PARM_DESC(crypto_all_kqblocked, "Are all asym crypto queues blocked");
-
-#define CRYPTO_Q_LOCK() \
- ({ \
- spin_lock_irqsave(&crypto_q_lock, q_flags); \
- dprintk("%s,%d: Q_LOCK()\n", __FILE__, __LINE__); \
- })
-#define CRYPTO_Q_UNLOCK() \
- ({ \
- dprintk("%s,%d: Q_UNLOCK()\n", __FILE__, __LINE__); \
- spin_unlock_irqrestore(&crypto_q_lock, q_flags); \
- })
-
-/*
- * There are two queues for processing completed crypto requests; one
- * for the symmetric and one for the asymmetric ops. We only need one
- * but have two to avoid type futzing (cryptop vs. cryptkop). A single
- * mutex is used to lock access to both queues. Note that this lock
- * must be separate from the lock on request queues to insure driver
- * callbacks don't generate lock order reversals.
- */
-static LIST_HEAD(crp_ret_q); /* callback queues */
-static LIST_HEAD(crp_ret_kq);
-
-static spinlock_t crypto_ret_q_lock;
-#define CRYPTO_RETQ_LOCK() \
- ({ \
- spin_lock_irqsave(&crypto_ret_q_lock, r_flags); \
- dprintk("%s,%d: RETQ_LOCK\n", __FILE__, __LINE__); \
- })
-#define CRYPTO_RETQ_UNLOCK() \
- ({ \
- dprintk("%s,%d: RETQ_UNLOCK\n", __FILE__, __LINE__); \
- spin_unlock_irqrestore(&crypto_ret_q_lock, r_flags); \
- })
-#define CRYPTO_RETQ_EMPTY() (list_empty(&crp_ret_q) && list_empty(&crp_ret_kq))
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
-static kmem_cache_t *cryptop_zone;
-static kmem_cache_t *cryptodesc_zone;
-#else
-static struct kmem_cache *cryptop_zone;
-static struct kmem_cache *cryptodesc_zone;
-#endif
-
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
-#include <linux/sched.h>
-#define kill_proc(p,s,v) send_sig(s,find_task_by_vpid(p),0)
-#endif
-
-#define debug crypto_debug
-int crypto_debug = 0;
-module_param(crypto_debug, int, 0644);
-MODULE_PARM_DESC(crypto_debug, "Enable debug");
-EXPORT_SYMBOL(crypto_debug);
-
-/*
- * Maximum number of outstanding crypto requests before we start
- * failing requests. We need this to prevent DOS when too many
- * requests are arriving for us to keep up. Otherwise we will
- * run the system out of memory. Since crypto is slow, we are
- * usually the bottleneck that needs to say, enough is enough.
- *
- * We cannot print errors when this condition occurs, we are already too
- * slow, printing anything will just kill us
- */
-
-static int crypto_q_cnt = 0;
-module_param(crypto_q_cnt, int, 0444);
-MODULE_PARM_DESC(crypto_q_cnt,
- "Current number of outstanding crypto requests");
-
-static int crypto_q_max = 1000;
-module_param(crypto_q_max, int, 0644);
-MODULE_PARM_DESC(crypto_q_max,
- "Maximum number of outstanding crypto requests");
-
-#define bootverbose crypto_verbose
-static int crypto_verbose = 0;
-module_param(crypto_verbose, int, 0644);
-MODULE_PARM_DESC(crypto_verbose,
- "Enable verbose crypto startup");
-
-int crypto_usercrypto = 1; /* userland may do crypto reqs */
-module_param(crypto_usercrypto, int, 0644);
-MODULE_PARM_DESC(crypto_usercrypto,
- "Enable/disable user-mode access to crypto support");
-
-int crypto_userasymcrypto = 1; /* userland may do asym crypto reqs */
-module_param(crypto_userasymcrypto, int, 0644);
-MODULE_PARM_DESC(crypto_userasymcrypto,
- "Enable/disable user-mode access to asymmetric crypto support");
-
-int crypto_devallowsoft = 0; /* only use hardware crypto */
-module_param(crypto_devallowsoft, int, 0644);
-MODULE_PARM_DESC(crypto_devallowsoft,
- "Enable/disable use of software crypto support");
-
-/*
- * This parameter controls the maximum number of crypto operations to
- * do consecutively in the crypto kernel thread before scheduling to allow
- * other processes to run. Without it, it is possible to get into a
- * situation where the crypto thread never allows any other processes to run.
- * Default to 1000 which should be less than one second.
- */
-static int crypto_max_loopcount = 1000;
-module_param(crypto_max_loopcount, int, 0644);
-MODULE_PARM_DESC(crypto_max_loopcount,
- "Maximum number of crypto ops to do before yielding to other processes");
-
-static pid_t cryptoproc = (pid_t) -1;
-static struct completion cryptoproc_exited;
-static DECLARE_WAIT_QUEUE_HEAD(cryptoproc_wait);
-static pid_t cryptoretproc = (pid_t) -1;
-static struct completion cryptoretproc_exited;
-static DECLARE_WAIT_QUEUE_HEAD(cryptoretproc_wait);
-
-static int crypto_proc(void *arg);
-static int crypto_ret_proc(void *arg);
-static int crypto_invoke(struct cryptocap *cap, struct cryptop *crp, int hint);
-static int crypto_kinvoke(struct cryptkop *krp, int flags);
-static void crypto_exit(void);
-static int crypto_init(void);
-
-static struct cryptostats cryptostats;
-
-static struct cryptocap *
-crypto_checkdriver(u_int32_t hid)
-{
- if (crypto_drivers == NULL)
- return NULL;
- return (hid >= crypto_drivers_num ? NULL : &crypto_drivers[hid]);
-}
-
-/*
- * Compare a driver's list of supported algorithms against another
- * list; return non-zero if all algorithms are supported.
- */
-static int
-driver_suitable(const struct cryptocap *cap, const struct cryptoini *cri)
-{
- const struct cryptoini *cr;
-
- /* See if all the algorithms are supported. */
- for (cr = cri; cr; cr = cr->cri_next)
- if (cap->cc_alg[cr->cri_alg] == 0)
- return 0;
- return 1;
-}
-
-/*
- * Select a driver for a new session that supports the specified
- * algorithms and, optionally, is constrained according to the flags.
- * The algorithm we use here is pretty stupid; just use the
- * first driver that supports all the algorithms we need. If there
- * are multiple drivers we choose the driver with the fewest active
- * sessions. We prefer hardware-backed drivers to software ones.
- *
- * XXX We need more smarts here (in real life too, but that's
- * XXX another story altogether).
- */
-static struct cryptocap *
-crypto_select_driver(const struct cryptoini *cri, int flags)
-{
- struct cryptocap *cap, *best;
- int match, hid;
-
- CRYPTO_DRIVER_ASSERT();
-
- /*
- * Look first for hardware crypto devices if permitted.
- */
- if (flags & CRYPTOCAP_F_HARDWARE)
- match = CRYPTOCAP_F_HARDWARE;
- else
- match = CRYPTOCAP_F_SOFTWARE;
- best = NULL;
-again:
- for (hid = 0; hid < crypto_drivers_num; hid++) {
- cap = &crypto_drivers[hid];
- /*
- * If it's not initialized, is in the process of
- * going away, or is not appropriate (hardware
- * or software based on match), then skip.
- */
- if (cap->cc_dev == NULL ||
- (cap->cc_flags & CRYPTOCAP_F_CLEANUP) ||
- (cap->cc_flags & match) == 0)
- continue;
-
- /* verify all the algorithms are supported. */
- if (driver_suitable(cap, cri)) {
- if (best == NULL ||
- cap->cc_sessions < best->cc_sessions)
- best = cap;
- }
- }
- if (best != NULL)
- return best;
- if (match == CRYPTOCAP_F_HARDWARE && (flags & CRYPTOCAP_F_SOFTWARE)) {
- /* sort of an Algol 68-style for loop */
- match = CRYPTOCAP_F_SOFTWARE;
- goto again;
- }
- return best;
-}
-
-/*
- * Create a new session. The crid argument specifies a crypto
- * driver to use or constraints on a driver to select (hardware
- * only, software only, either). Whatever driver is selected
- * must be capable of the requested crypto algorithms.
- */
-int
-crypto_newsession(u_int64_t *sid, struct cryptoini *cri, int crid)
-{
- struct cryptocap *cap;
- u_int32_t hid, lid;
- int err;
- unsigned long d_flags;
-
- CRYPTO_DRIVER_LOCK();
- if ((crid & (CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE)) == 0) {
- /*
- * Use specified driver; verify it is capable.
- */
- cap = crypto_checkdriver(crid);
- if (cap != NULL && !driver_suitable(cap, cri))
- cap = NULL;
- } else {
- /*
- * No requested driver; select based on crid flags.
- */
- cap = crypto_select_driver(cri, crid);
- /*
- * if NULL then can't do everything in one session.
- * XXX Fix this. We need to inject a "virtual" session
- * XXX layer right about here.
- */
- }
- if (cap != NULL) {
- /* Call the driver initialization routine. */
- hid = cap - crypto_drivers;
- lid = hid; /* Pass the driver ID. */
- cap->cc_sessions++;
- CRYPTO_DRIVER_UNLOCK();
- err = CRYPTODEV_NEWSESSION(cap->cc_dev, &lid, cri);
- CRYPTO_DRIVER_LOCK();
- if (err == 0) {
- (*sid) = (cap->cc_flags & 0xff000000)
- | (hid & 0x00ffffff);
- (*sid) <<= 32;
- (*sid) |= (lid & 0xffffffff);
- } else
- cap->cc_sessions--;
- } else
- err = EINVAL;
- CRYPTO_DRIVER_UNLOCK();
- return err;
-}
-
-static void
-crypto_remove(struct cryptocap *cap)
-{
- CRYPTO_DRIVER_ASSERT();
- if (cap->cc_sessions == 0 && cap->cc_koperations == 0)
- bzero(cap, sizeof(*cap));
-}
-
-/*
- * Delete an existing session (or a reserved session on an unregistered
- * driver).
- */
-int
-crypto_freesession(u_int64_t sid)
-{
- struct cryptocap *cap;
- u_int32_t hid;
- int err = 0;
- unsigned long d_flags;
-
- dprintk("%s()\n", __FUNCTION__);
- CRYPTO_DRIVER_LOCK();
-
- if (crypto_drivers == NULL) {
- err = EINVAL;
- goto done;
- }
-
- /* Determine two IDs. */
- hid = CRYPTO_SESID2HID(sid);
-
- if (hid >= crypto_drivers_num) {
- dprintk("%s - INVALID DRIVER NUM %d\n", __FUNCTION__, hid);
- err = ENOENT;
- goto done;
- }
- cap = &crypto_drivers[hid];
-
- if (cap->cc_dev) {
- CRYPTO_DRIVER_UNLOCK();
- /* Call the driver cleanup routine, if available, unlocked. */
- err = CRYPTODEV_FREESESSION(cap->cc_dev, sid);
- CRYPTO_DRIVER_LOCK();
- }
-
- if (cap->cc_sessions)
- cap->cc_sessions--;
-
- if (cap->cc_flags & CRYPTOCAP_F_CLEANUP)
- crypto_remove(cap);
-
-done:
- CRYPTO_DRIVER_UNLOCK();
- return err;
-}
-
-/*
- * Return an unused driver id. Used by drivers prior to registering
- * support for the algorithms they handle.
- */
-int32_t
-crypto_get_driverid(device_t dev, int flags)
-{
- struct cryptocap *newdrv;
- int i;
- unsigned long d_flags;
-
- if ((flags & (CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE)) == 0) {
- printf("%s: no flags specified when registering driver\n",
- device_get_nameunit(dev));
- return -1;
- }
-
- CRYPTO_DRIVER_LOCK();
-
- for (i = 0; i < crypto_drivers_num; i++) {
- if (crypto_drivers[i].cc_dev == NULL &&
- (crypto_drivers[i].cc_flags & CRYPTOCAP_F_CLEANUP) == 0) {
- break;
- }
- }
-
- /* Out of entries, allocate some more. */
- if (i == crypto_drivers_num) {
- /* Be careful about wrap-around. */
- if (2 * crypto_drivers_num <= crypto_drivers_num) {
- CRYPTO_DRIVER_UNLOCK();
- printk("crypto: driver count wraparound!\n");
- return -1;
- }
-
- newdrv = kmalloc(2 * crypto_drivers_num * sizeof(struct cryptocap),
- GFP_KERNEL);
- if (newdrv == NULL) {
- CRYPTO_DRIVER_UNLOCK();
- printk("crypto: no space to expand driver table!\n");
- return -1;
- }
-
- memcpy(newdrv, crypto_drivers,
- crypto_drivers_num * sizeof(struct cryptocap));
- memset(&newdrv[crypto_drivers_num], 0,
- crypto_drivers_num * sizeof(struct cryptocap));
-
- crypto_drivers_num *= 2;
-
- kfree(crypto_drivers);
- crypto_drivers = newdrv;
- }
-
- /* NB: state is zero'd on free */
- crypto_drivers[i].cc_sessions = 1; /* Mark */
- crypto_drivers[i].cc_dev = dev;
- crypto_drivers[i].cc_flags = flags;
- if (bootverbose)
- printf("crypto: assign %s driver id %u, flags %u\n",
- device_get_nameunit(dev), i, flags);
-
- CRYPTO_DRIVER_UNLOCK();
-
- return i;
-}
-
-/*
- * Lookup a driver by name. We match against the full device
- * name and unit, and against just the name. The latter gives
- * us a simple widlcarding by device name. On success return the
- * driver/hardware identifier; otherwise return -1.
- */
-int
-crypto_find_driver(const char *match)
-{
- int i, len = strlen(match);
- unsigned long d_flags;
-
- CRYPTO_DRIVER_LOCK();
- for (i = 0; i < crypto_drivers_num; i++) {
- device_t dev = crypto_drivers[i].cc_dev;
- if (dev == NULL ||
- (crypto_drivers[i].cc_flags & CRYPTOCAP_F_CLEANUP))
- continue;
- if (strncmp(match, device_get_nameunit(dev), len) == 0 ||
- strncmp(match, device_get_name(dev), len) == 0)
- break;
- }
- CRYPTO_DRIVER_UNLOCK();
- return i < crypto_drivers_num ? i : -1;
-}
-
-/*
- * Return the device_t for the specified driver or NULL
- * if the driver identifier is invalid.
- */
-device_t
-crypto_find_device_byhid(int hid)
-{
- struct cryptocap *cap = crypto_checkdriver(hid);
- return cap != NULL ? cap->cc_dev : NULL;
-}
-
-/*
- * Return the device/driver capabilities.
- */
-int
-crypto_getcaps(int hid)
-{
- struct cryptocap *cap = crypto_checkdriver(hid);
- return cap != NULL ? cap->cc_flags : 0;
-}
-
-/*
- * Register support for a key-related algorithm. This routine
- * is called once for each algorithm supported a driver.
- */
-int
-crypto_kregister(u_int32_t driverid, int kalg, u_int32_t flags)
-{
- struct cryptocap *cap;
- int err;
- unsigned long d_flags;
-
- dprintk("%s()\n", __FUNCTION__);
- CRYPTO_DRIVER_LOCK();
-
- cap = crypto_checkdriver(driverid);
- if (cap != NULL &&
- (CRK_ALGORITM_MIN <= kalg && kalg <= CRK_ALGORITHM_MAX)) {
- /*
- * XXX Do some performance testing to determine placing.
- * XXX We probably need an auxiliary data structure that
- * XXX describes relative performances.
- */
-
- cap->cc_kalg[kalg] = flags | CRYPTO_ALG_FLAG_SUPPORTED;
- if (bootverbose)
- printf("crypto: %s registers key alg %u flags %u\n"
- , device_get_nameunit(cap->cc_dev)
- , kalg
- , flags
- );
- err = 0;
- } else
- err = EINVAL;
-
- CRYPTO_DRIVER_UNLOCK();
- return err;
-}
-
-/*
- * Register support for a non-key-related algorithm. This routine
- * is called once for each such algorithm supported by a driver.
- */
-int
-crypto_register(u_int32_t driverid, int alg, u_int16_t maxoplen,
- u_int32_t flags)
-{
- struct cryptocap *cap;
- int err;
- unsigned long d_flags;
-
- dprintk("%s(id=0x%x, alg=%d, maxoplen=%d, flags=0x%x)\n", __FUNCTION__,
- driverid, alg, maxoplen, flags);
-
- CRYPTO_DRIVER_LOCK();
-
- cap = crypto_checkdriver(driverid);
- /* NB: algorithms are in the range [1..max] */
- if (cap != NULL &&
- (CRYPTO_ALGORITHM_MIN <= alg && alg <= CRYPTO_ALGORITHM_MAX)) {
- /*
- * XXX Do some performance testing to determine placing.
- * XXX We probably need an auxiliary data structure that
- * XXX describes relative performances.
- */
-
- cap->cc_alg[alg] = flags | CRYPTO_ALG_FLAG_SUPPORTED;
- cap->cc_max_op_len[alg] = maxoplen;
- if (bootverbose)
- printf("crypto: %s registers alg %u flags %u maxoplen %u\n"
- , device_get_nameunit(cap->cc_dev)
- , alg
- , flags
- , maxoplen
- );
- cap->cc_sessions = 0; /* Unmark */
- err = 0;
- } else
- err = EINVAL;
-
- CRYPTO_DRIVER_UNLOCK();
- return err;
-}
-
-static void
-driver_finis(struct cryptocap *cap)
-{
- u_int32_t ses, kops;
-
- CRYPTO_DRIVER_ASSERT();
-
- ses = cap->cc_sessions;
- kops = cap->cc_koperations;
- bzero(cap, sizeof(*cap));
- if (ses != 0 || kops != 0) {
- /*
- * If there are pending sessions,
- * just mark as invalid.
- */
- cap->cc_flags |= CRYPTOCAP_F_CLEANUP;
- cap->cc_sessions = ses;
- cap->cc_koperations = kops;
- }
-}
-
-/*
- * Unregister a crypto driver. If there are pending sessions using it,
- * leave enough information around so that subsequent calls using those
- * sessions will correctly detect the driver has been unregistered and
- * reroute requests.
- */
-int
-crypto_unregister(u_int32_t driverid, int alg)
-{
- struct cryptocap *cap;
- int i, err;
- unsigned long d_flags;
-
- dprintk("%s()\n", __FUNCTION__);
- CRYPTO_DRIVER_LOCK();
-
- cap = crypto_checkdriver(driverid);
- if (cap != NULL &&
- (CRYPTO_ALGORITHM_MIN <= alg && alg <= CRYPTO_ALGORITHM_MAX) &&
- cap->cc_alg[alg] != 0) {
- cap->cc_alg[alg] = 0;
- cap->cc_max_op_len[alg] = 0;
-
- /* Was this the last algorithm ? */
- for (i = 1; i <= CRYPTO_ALGORITHM_MAX; i++)
- if (cap->cc_alg[i] != 0)
- break;
-
- if (i == CRYPTO_ALGORITHM_MAX + 1)
- driver_finis(cap);
- err = 0;
- } else
- err = EINVAL;
- CRYPTO_DRIVER_UNLOCK();
- return err;
-}
-
-/*
- * Unregister all algorithms associated with a crypto driver.
- * If there are pending sessions using it, leave enough information
- * around so that subsequent calls using those sessions will
- * correctly detect the driver has been unregistered and reroute
- * requests.
- */
-int
-crypto_unregister_all(u_int32_t driverid)
-{
- struct cryptocap *cap;
- int err;
- unsigned long d_flags;
-
- dprintk("%s()\n", __FUNCTION__);
- CRYPTO_DRIVER_LOCK();
- cap = crypto_checkdriver(driverid);
- if (cap != NULL) {
- driver_finis(cap);
- err = 0;
- } else
- err = EINVAL;
- CRYPTO_DRIVER_UNLOCK();
-
- return err;
-}
-
-/*
- * Clear blockage on a driver. The what parameter indicates whether
- * the driver is now ready for cryptop's and/or cryptokop's.
- */
-int
-crypto_unblock(u_int32_t driverid, int what)
-{
- struct cryptocap *cap;
- int err;
- unsigned long q_flags;
-
- CRYPTO_Q_LOCK();
- cap = crypto_checkdriver(driverid);
- if (cap != NULL) {
- if (what & CRYPTO_SYMQ) {
- cap->cc_qblocked = 0;
- cap->cc_unqblocked = 0;
- crypto_all_qblocked = 0;
- }
- if (what & CRYPTO_ASYMQ) {
- cap->cc_kqblocked = 0;
- cap->cc_unkqblocked = 0;
- crypto_all_kqblocked = 0;
- }
- if (crp_sleep)
- wake_up_interruptible(&cryptoproc_wait);
- err = 0;
- } else
- err = EINVAL;
- CRYPTO_Q_UNLOCK(); //DAVIDM should this be a driver lock
-
- return err;
-}
-
-/*
- * Add a crypto request to a queue, to be processed by the kernel thread.
- */
-int
-crypto_dispatch(struct cryptop *crp)
-{
- struct cryptocap *cap;
- int result = -1;
- unsigned long q_flags;
-
- dprintk("%s()\n", __FUNCTION__);
-
- cryptostats.cs_ops++;
-
- CRYPTO_Q_LOCK();
- if (crypto_q_cnt >= crypto_q_max) {
- CRYPTO_Q_UNLOCK();
- cryptostats.cs_drops++;
- return ENOMEM;
- }
- crypto_q_cnt++;
-
- /* make sure we are starting a fresh run on this crp. */
- crp->crp_flags &= ~CRYPTO_F_DONE;
- crp->crp_etype = 0;
-
- /*
- * Caller marked the request to be processed immediately; dispatch
- * it directly to the driver unless the driver is currently blocked.
- */
- if ((crp->crp_flags & CRYPTO_F_BATCH) == 0) {
- int hid = CRYPTO_SESID2HID(crp->crp_sid);
- cap = crypto_checkdriver(hid);
- /* Driver cannot disappear when there is an active session. */
- KASSERT(cap != NULL, ("%s: Driver disappeared.", __func__));
- if (!cap->cc_qblocked) {
- crypto_all_qblocked = 0;
- crypto_drivers[hid].cc_unqblocked = 1;
- CRYPTO_Q_UNLOCK();
- result = crypto_invoke(cap, crp, 0);
- CRYPTO_Q_LOCK();
- if (result == ERESTART)
- if (crypto_drivers[hid].cc_unqblocked)
- crypto_drivers[hid].cc_qblocked = 1;
- crypto_drivers[hid].cc_unqblocked = 0;
- }
- }
- if (result == ERESTART) {
- /*
- * The driver ran out of resources, mark the
- * driver ``blocked'' for cryptop's and put
- * the request back in the queue. It would
- * best to put the request back where we got
- * it but that's hard so for now we put it
- * at the front. This should be ok; putting
- * it at the end does not work.
- */
- list_add(&crp->crp_next, &crp_q);
- cryptostats.cs_blocks++;
- result = 0;
- } else if (result == -1) {
- TAILQ_INSERT_TAIL(&crp_q, crp, crp_next);
- result = 0;
- }
- if (crp_sleep)
- wake_up_interruptible(&cryptoproc_wait);
- CRYPTO_Q_UNLOCK();
- return result;
-}
-
-/*
- * Add an asymetric crypto request to a queue,
- * to be processed by the kernel thread.
- */
-int
-crypto_kdispatch(struct cryptkop *krp)
-{
- int error;
- unsigned long q_flags;
-
- cryptostats.cs_kops++;
-
- error = crypto_kinvoke(krp, krp->krp_crid);
- if (error == ERESTART) {
- CRYPTO_Q_LOCK();
- TAILQ_INSERT_TAIL(&crp_kq, krp, krp_next);
- if (crp_sleep)
- wake_up_interruptible(&cryptoproc_wait);
- CRYPTO_Q_UNLOCK();
- error = 0;
- }
- return error;
-}
-
-/*
- * Verify a driver is suitable for the specified operation.
- */
-static __inline int
-kdriver_suitable(const struct cryptocap *cap, const struct cryptkop *krp)
-{
- return (cap->cc_kalg[krp->krp_op] & CRYPTO_ALG_FLAG_SUPPORTED) != 0;
-}
-
-/*
- * Select a driver for an asym operation. The driver must
- * support the necessary algorithm. The caller can constrain
- * which device is selected with the flags parameter. The
- * algorithm we use here is pretty stupid; just use the first
- * driver that supports the algorithms we need. If there are
- * multiple suitable drivers we choose the driver with the
- * fewest active operations. We prefer hardware-backed
- * drivers to software ones when either may be used.
- */
-static struct cryptocap *
-crypto_select_kdriver(const struct cryptkop *krp, int flags)
-{
- struct cryptocap *cap, *best, *blocked;
- int match, hid;
-
- CRYPTO_DRIVER_ASSERT();
-
- /*
- * Look first for hardware crypto devices if permitted.
- */
- if (flags & CRYPTOCAP_F_HARDWARE)
- match = CRYPTOCAP_F_HARDWARE;
- else
- match = CRYPTOCAP_F_SOFTWARE;
- best = NULL;
- blocked = NULL;
-again:
- for (hid = 0; hid < crypto_drivers_num; hid++) {
- cap = &crypto_drivers[hid];
- /*
- * If it's not initialized, is in the process of
- * going away, or is not appropriate (hardware
- * or software based on match), then skip.
- */
- if (cap->cc_dev == NULL ||
- (cap->cc_flags & CRYPTOCAP_F_CLEANUP) ||
- (cap->cc_flags & match) == 0)
- continue;
-
- /* verify all the algorithms are supported. */
- if (kdriver_suitable(cap, krp)) {
- if (best == NULL ||
- cap->cc_koperations < best->cc_koperations)
- best = cap;
- }
- }
- if (best != NULL)
- return best;
- if (match == CRYPTOCAP_F_HARDWARE && (flags & CRYPTOCAP_F_SOFTWARE)) {
- /* sort of an Algol 68-style for loop */
- match = CRYPTOCAP_F_SOFTWARE;
- goto again;
- }
- return best;
-}
-
-/*
- * Dispatch an assymetric crypto request.
- */
-static int
-crypto_kinvoke(struct cryptkop *krp, int crid)
-{
- struct cryptocap *cap = NULL;
- int error;
- unsigned long d_flags;
-
- KASSERT(krp != NULL, ("%s: krp == NULL", __func__));
- KASSERT(krp->krp_callback != NULL,
- ("%s: krp->crp_callback == NULL", __func__));
-
- CRYPTO_DRIVER_LOCK();
- if ((crid & (CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE)) == 0) {
- cap = crypto_checkdriver(crid);
- if (cap != NULL) {
- /*
- * Driver present, it must support the necessary
- * algorithm and, if s/w drivers are excluded,
- * it must be registered as hardware-backed.
- */
- if (!kdriver_suitable(cap, krp) ||
- (!crypto_devallowsoft &&
- (cap->cc_flags & CRYPTOCAP_F_HARDWARE) == 0))
- cap = NULL;
- }
- } else {
- /*
- * No requested driver; select based on crid flags.
- */
- if (!crypto_devallowsoft) /* NB: disallow s/w drivers */
- crid &= ~CRYPTOCAP_F_SOFTWARE;
- cap = crypto_select_kdriver(krp, crid);
- }
- if (cap != NULL && !cap->cc_kqblocked) {
- krp->krp_hid = cap - crypto_drivers;
- cap->cc_koperations++;
- CRYPTO_DRIVER_UNLOCK();
- error = CRYPTODEV_KPROCESS(cap->cc_dev, krp, 0);
- CRYPTO_DRIVER_LOCK();
- if (error == ERESTART) {
- cap->cc_koperations--;
- CRYPTO_DRIVER_UNLOCK();
- return (error);
- }
- /* return the actual device used */
- krp->krp_crid = krp->krp_hid;
- } else {
- /*
- * NB: cap is !NULL if device is blocked; in
- * that case return ERESTART so the operation
- * is resubmitted if possible.
- */
- error = (cap == NULL) ? ENODEV : ERESTART;
- }
- CRYPTO_DRIVER_UNLOCK();
-
- if (error) {
- krp->krp_status = error;
- crypto_kdone(krp);
- }
- return 0;
-}
-
-
-/*
- * Dispatch a crypto request to the appropriate crypto devices.
- */
-static int
-crypto_invoke(struct cryptocap *cap, struct cryptop *crp, int hint)
-{
- KASSERT(crp != NULL, ("%s: crp == NULL", __func__));
- KASSERT(crp->crp_callback != NULL,
- ("%s: crp->crp_callback == NULL", __func__));
- KASSERT(crp->crp_desc != NULL, ("%s: crp->crp_desc == NULL", __func__));
-
- dprintk("%s()\n", __FUNCTION__);
-
-#ifdef CRYPTO_TIMING
- if (crypto_timing)
- crypto_tstat(&cryptostats.cs_invoke, &crp->crp_tstamp);
-#endif
- if (cap->cc_flags & CRYPTOCAP_F_CLEANUP) {
- struct cryptodesc *crd;
- u_int64_t nid;
-
- /*
- * Driver has unregistered; migrate the session and return
- * an error to the caller so they'll resubmit the op.
- *
- * XXX: What if there are more already queued requests for this
- * session?
- */
- crypto_freesession(crp->crp_sid);
-
- for (crd = crp->crp_desc; crd->crd_next; crd = crd->crd_next)
- crd->CRD_INI.cri_next = &(crd->crd_next->CRD_INI);
-
- /* XXX propagate flags from initial session? */
- if (crypto_newsession(&nid, &(crp->crp_desc->CRD_INI),
- CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE) == 0)
- crp->crp_sid = nid;
-
- crp->crp_etype = EAGAIN;
- crypto_done(crp);
- return 0;
- } else {
- /*
- * Invoke the driver to process the request.
- */
- return CRYPTODEV_PROCESS(cap->cc_dev, crp, hint);
- }
-}
-
-/*
- * Release a set of crypto descriptors.
- */
-void
-crypto_freereq(struct cryptop *crp)
-{
- struct cryptodesc *crd;
-
- if (crp == NULL)
- return;
-
-#ifdef DIAGNOSTIC
- {
- struct cryptop *crp2;
- unsigned long q_flags;
-
- CRYPTO_Q_LOCK();
- TAILQ_FOREACH(crp2, &crp_q, crp_next) {
- KASSERT(crp2 != crp,
- ("Freeing cryptop from the crypto queue (%p).",
- crp));
- }
- CRYPTO_Q_UNLOCK();
- CRYPTO_RETQ_LOCK();
- TAILQ_FOREACH(crp2, &crp_ret_q, crp_next) {
- KASSERT(crp2 != crp,
- ("Freeing cryptop from the return queue (%p).",
- crp));
- }
- CRYPTO_RETQ_UNLOCK();
- }
-#endif
-
- while ((crd = crp->crp_desc) != NULL) {
- crp->crp_desc = crd->crd_next;
- kmem_cache_free(cryptodesc_zone, crd);
- }
- kmem_cache_free(cryptop_zone, crp);
-}
-
-/*
- * Acquire a set of crypto descriptors.
- */
-struct cryptop *
-crypto_getreq(int num)
-{
- struct cryptodesc *crd;
- struct cryptop *crp;
-
- crp = kmem_cache_alloc(cryptop_zone, SLAB_ATOMIC);
- if (crp != NULL) {
- memset(crp, 0, sizeof(*crp));
- INIT_LIST_HEAD(&crp->crp_next);
- init_waitqueue_head(&crp->crp_waitq);
- while (num--) {
- crd = kmem_cache_alloc(cryptodesc_zone, SLAB_ATOMIC);
- if (crd == NULL) {
- crypto_freereq(crp);
- return NULL;
- }
- memset(crd, 0, sizeof(*crd));
- crd->crd_next = crp->crp_desc;
- crp->crp_desc = crd;
- }
- }
- return crp;
-}
-
-/*
- * Invoke the callback on behalf of the driver.
- */
-void
-crypto_done(struct cryptop *crp)
-{
- unsigned long q_flags;
-
- dprintk("%s()\n", __FUNCTION__);
- if ((crp->crp_flags & CRYPTO_F_DONE) == 0) {
- crp->crp_flags |= CRYPTO_F_DONE;
- CRYPTO_Q_LOCK();
- crypto_q_cnt--;
- CRYPTO_Q_UNLOCK();
- } else
- printk("crypto: crypto_done op already done, flags 0x%x",
- crp->crp_flags);
- if (crp->crp_etype != 0)
- cryptostats.cs_errs++;
- /*
- * CBIMM means unconditionally do the callback immediately;
- * CBIFSYNC means do the callback immediately only if the
- * operation was done synchronously. Both are used to avoid
- * doing extraneous context switches; the latter is mostly
- * used with the software crypto driver.
- */
- if ((crp->crp_flags & CRYPTO_F_CBIMM) ||
- ((crp->crp_flags & CRYPTO_F_CBIFSYNC) &&
- (CRYPTO_SESID2CAPS(crp->crp_sid) & CRYPTOCAP_F_SYNC))) {
- /*
- * Do the callback directly. This is ok when the
- * callback routine does very little (e.g. the
- * /dev/crypto callback method just does a wakeup).
- */
- crp->crp_callback(crp);
- } else {
- unsigned long r_flags;
- /*
- * Normal case; queue the callback for the thread.
- */
- CRYPTO_RETQ_LOCK();
- if (CRYPTO_RETQ_EMPTY())
- wake_up_interruptible(&cryptoretproc_wait);/* shared wait channel */
- TAILQ_INSERT_TAIL(&crp_ret_q, crp, crp_next);
- CRYPTO_RETQ_UNLOCK();
- }
-}
-
-/*
- * Invoke the callback on behalf of the driver.
- */
-void
-crypto_kdone(struct cryptkop *krp)
-{
- struct cryptocap *cap;
- unsigned long d_flags;
-
- if ((krp->krp_flags & CRYPTO_KF_DONE) != 0)
- printk("crypto: crypto_kdone op already done, flags 0x%x",
- krp->krp_flags);
- krp->krp_flags |= CRYPTO_KF_DONE;
- if (krp->krp_status != 0)
- cryptostats.cs_kerrs++;
-
- CRYPTO_DRIVER_LOCK();
- /* XXX: What if driver is loaded in the meantime? */
- if (krp->krp_hid < crypto_drivers_num) {
- cap = &crypto_drivers[krp->krp_hid];
- cap->cc_koperations--;
- KASSERT(cap->cc_koperations >= 0, ("cc_koperations < 0"));
- if (cap->cc_flags & CRYPTOCAP_F_CLEANUP)
- crypto_remove(cap);
- }
- CRYPTO_DRIVER_UNLOCK();
-
- /*
- * CBIMM means unconditionally do the callback immediately;
- * This is used to avoid doing extraneous context switches
- */
- if ((krp->krp_flags & CRYPTO_KF_CBIMM)) {
- /*
- * Do the callback directly. This is ok when the
- * callback routine does very little (e.g. the
- * /dev/crypto callback method just does a wakeup).
- */
- krp->krp_callback(krp);
- } else {
- unsigned long r_flags;
- /*
- * Normal case; queue the callback for the thread.
- */
- CRYPTO_RETQ_LOCK();
- if (CRYPTO_RETQ_EMPTY())
- wake_up_interruptible(&cryptoretproc_wait);/* shared wait channel */
- TAILQ_INSERT_TAIL(&crp_ret_kq, krp, krp_next);
- CRYPTO_RETQ_UNLOCK();
- }
-}
-
-int
-crypto_getfeat(int *featp)
-{
- int hid, kalg, feat = 0;
- unsigned long d_flags;
-
- CRYPTO_DRIVER_LOCK();
- for (hid = 0; hid < crypto_drivers_num; hid++) {
- const struct cryptocap *cap = &crypto_drivers[hid];
-
- if ((cap->cc_flags & CRYPTOCAP_F_SOFTWARE) &&
- !crypto_devallowsoft) {
- continue;
- }
- for (kalg = 0; kalg < CRK_ALGORITHM_MAX; kalg++)
- if (cap->cc_kalg[kalg] & CRYPTO_ALG_FLAG_SUPPORTED)
- feat |= 1 << kalg;
- }
- CRYPTO_DRIVER_UNLOCK();
- *featp = feat;
- return (0);
-}
-
-/*
- * Crypto thread, dispatches crypto requests.
- */
-static int
-crypto_proc(void *arg)
-{
- struct cryptop *crp, *submit;
- struct cryptkop *krp, *krpp;
- struct cryptocap *cap;
- u_int32_t hid;
- int result, hint;
- unsigned long q_flags;
- int loopcount = 0;
-
- ocf_daemonize("crypto");
-
- CRYPTO_Q_LOCK();
- for (;;) {
- /*
- * we need to make sure we don't get into a busy loop with nothing
- * to do, the two crypto_all_*blocked vars help us find out when
- * we are all full and can do nothing on any driver or Q. If so we
- * wait for an unblock.
- */
- crypto_all_qblocked = !list_empty(&crp_q);
-
- /*
- * Find the first element in the queue that can be
- * processed and look-ahead to see if multiple ops
- * are ready for the same driver.
- */
- submit = NULL;
- hint = 0;
- list_for_each_entry(crp, &crp_q, crp_next) {
- hid = CRYPTO_SESID2HID(crp->crp_sid);
- cap = crypto_checkdriver(hid);
- /*
- * Driver cannot disappear when there is an active
- * session.
- */
- KASSERT(cap != NULL, ("%s:%u Driver disappeared.",
- __func__, __LINE__));
- if (cap == NULL || cap->cc_dev == NULL) {
- /* Op needs to be migrated, process it. */
- if (submit == NULL)
- submit = crp;
- break;
- }
- if (!cap->cc_qblocked) {
- if (submit != NULL) {
- /*
- * We stop on finding another op,
- * regardless whether its for the same
- * driver or not. We could keep
- * searching the queue but it might be
- * better to just use a per-driver
- * queue instead.
- */
- if (CRYPTO_SESID2HID(submit->crp_sid) == hid)
- hint = CRYPTO_HINT_MORE;
- break;
- } else {
- submit = crp;
- if ((submit->crp_flags & CRYPTO_F_BATCH) == 0)
- break;
- /* keep scanning for more are q'd */
- }
- }
- }
- if (submit != NULL) {
- hid = CRYPTO_SESID2HID(submit->crp_sid);
- crypto_all_qblocked = 0;
- list_del(&submit->crp_next);
- crypto_drivers[hid].cc_unqblocked = 1;
- cap = crypto_checkdriver(hid);
- CRYPTO_Q_UNLOCK();
- KASSERT(cap != NULL, ("%s:%u Driver disappeared.",
- __func__, __LINE__));
- result = crypto_invoke(cap, submit, hint);
- CRYPTO_Q_LOCK();
- if (result == ERESTART) {
- /*
- * The driver ran out of resources, mark the
- * driver ``blocked'' for cryptop's and put
- * the request back in the queue. It would
- * best to put the request back where we got
- * it but that's hard so for now we put it
- * at the front. This should be ok; putting
- * it at the end does not work.
- */
- /* XXX validate sid again? */
- list_add(&submit->crp_next, &crp_q);
- cryptostats.cs_blocks++;
- if (crypto_drivers[hid].cc_unqblocked)
- crypto_drivers[hid].cc_qblocked=0;
- crypto_drivers[hid].cc_unqblocked=0;
- }
- crypto_drivers[hid].cc_unqblocked = 0;
- }
-
- crypto_all_kqblocked = !list_empty(&crp_kq);
-
- /* As above, but for key ops */
- krp = NULL;
- list_for_each_entry(krpp, &crp_kq, krp_next) {
- cap = crypto_checkdriver(krpp->krp_hid);
- if (cap == NULL || cap->cc_dev == NULL) {
- /*
- * Operation needs to be migrated, invalidate
- * the assigned device so it will reselect a
- * new one below. Propagate the original
- * crid selection flags if supplied.
- */
- krp->krp_hid = krp->krp_crid &
- (CRYPTOCAP_F_SOFTWARE|CRYPTOCAP_F_HARDWARE);
- if (krp->krp_hid == 0)
- krp->krp_hid =
- CRYPTOCAP_F_SOFTWARE|CRYPTOCAP_F_HARDWARE;
- break;
- }
- if (!cap->cc_kqblocked) {
- krp = krpp;
- break;
- }
- }
- if (krp != NULL) {
- crypto_all_kqblocked = 0;
- list_del(&krp->krp_next);
- crypto_drivers[krp->krp_hid].cc_kqblocked = 1;
- CRYPTO_Q_UNLOCK();
- result = crypto_kinvoke(krp, krp->krp_hid);
- CRYPTO_Q_LOCK();
- if (result == ERESTART) {
- /*
- * The driver ran out of resources, mark the
- * driver ``blocked'' for cryptkop's and put
- * the request back in the queue. It would
- * best to put the request back where we got
- * it but that's hard so for now we put it
- * at the front. This should be ok; putting
- * it at the end does not work.
- */
- /* XXX validate sid again? */
- list_add(&krp->krp_next, &crp_kq);
- cryptostats.cs_kblocks++;
- } else
- crypto_drivers[krp->krp_hid].cc_kqblocked = 0;
- }
-
- if (submit == NULL && krp == NULL) {
- /*
- * Nothing more to be processed. Sleep until we're
- * woken because there are more ops to process.
- * This happens either by submission or by a driver
- * becoming unblocked and notifying us through
- * crypto_unblock. Note that when we wakeup we
- * start processing each queue again from the
- * front. It's not clear that it's important to
- * preserve this ordering since ops may finish
- * out of order if dispatched to different devices
- * and some become blocked while others do not.
- */
- dprintk("%s - sleeping (qe=%d qb=%d kqe=%d kqb=%d)\n",
- __FUNCTION__,
- list_empty(&crp_q), crypto_all_qblocked,
- list_empty(&crp_kq), crypto_all_kqblocked);
- loopcount = 0;
- CRYPTO_Q_UNLOCK();
- crp_sleep = 1;
- wait_event_interruptible(cryptoproc_wait,
- !(list_empty(&crp_q) || crypto_all_qblocked) ||
- !(list_empty(&crp_kq) || crypto_all_kqblocked) ||
- cryptoproc == (pid_t) -1);
- crp_sleep = 0;
- if (signal_pending (current)) {
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
- spin_lock_irq(¤t->sigmask_lock);
-#endif
- flush_signals(current);
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
- spin_unlock_irq(¤t->sigmask_lock);
-#endif
- }
- CRYPTO_Q_LOCK();
- dprintk("%s - awake\n", __FUNCTION__);
- if (cryptoproc == (pid_t) -1)
- break;
- cryptostats.cs_intrs++;
- } else if (loopcount > crypto_max_loopcount) {
- /*
- * Give other processes a chance to run if we've
- * been using the CPU exclusively for a while.
- */
- loopcount = 0;
- schedule();
- }
- loopcount++;
- }
- CRYPTO_Q_UNLOCK();
- complete_and_exit(&cryptoproc_exited, 0);
-}
-
-/*
- * Crypto returns thread, does callbacks for processed crypto requests.
- * Callbacks are done here, rather than in the crypto drivers, because
- * callbacks typically are expensive and would slow interrupt handling.
- */
-static int
-crypto_ret_proc(void *arg)
-{
- struct cryptop *crpt;
- struct cryptkop *krpt;
- unsigned long r_flags;
-
- ocf_daemonize("crypto_ret");
-
- CRYPTO_RETQ_LOCK();
- for (;;) {
- /* Harvest return q's for completed ops */
- crpt = NULL;
- if (!list_empty(&crp_ret_q))
- crpt = list_entry(crp_ret_q.next, typeof(*crpt), crp_next);
- if (crpt != NULL)
- list_del(&crpt->crp_next);
-
- krpt = NULL;
- if (!list_empty(&crp_ret_kq))
- krpt = list_entry(crp_ret_kq.next, typeof(*krpt), krp_next);
- if (krpt != NULL)
- list_del(&krpt->krp_next);
-
- if (crpt != NULL || krpt != NULL) {
- CRYPTO_RETQ_UNLOCK();
- /*
- * Run callbacks unlocked.
- */
- if (crpt != NULL)
- crpt->crp_callback(crpt);
- if (krpt != NULL)
- krpt->krp_callback(krpt);
- CRYPTO_RETQ_LOCK();
- } else {
- /*
- * Nothing more to be processed. Sleep until we're
- * woken because there are more returns to process.
- */
- dprintk("%s - sleeping\n", __FUNCTION__);
- CRYPTO_RETQ_UNLOCK();
- wait_event_interruptible(cryptoretproc_wait,
- cryptoretproc == (pid_t) -1 ||
- !list_empty(&crp_ret_q) ||
- !list_empty(&crp_ret_kq));
- if (signal_pending (current)) {
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
- spin_lock_irq(¤t->sigmask_lock);
-#endif
- flush_signals(current);
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
- spin_unlock_irq(¤t->sigmask_lock);
-#endif
- }
- CRYPTO_RETQ_LOCK();
- dprintk("%s - awake\n", __FUNCTION__);
- if (cryptoretproc == (pid_t) -1) {
- dprintk("%s - EXITING!\n", __FUNCTION__);
- break;
- }
- cryptostats.cs_rets++;
- }
- }
- CRYPTO_RETQ_UNLOCK();
- complete_and_exit(&cryptoretproc_exited, 0);
-}
-
-
-#if 0 /* should put this into /proc or something */
-static void
-db_show_drivers(void)
-{
- int hid;
-
- db_printf("%12s %4s %4s %8s %2s %2s\n"
- , "Device"
- , "Ses"
- , "Kops"
- , "Flags"
- , "QB"
- , "KB"
- );
- for (hid = 0; hid < crypto_drivers_num; hid++) {
- const struct cryptocap *cap = &crypto_drivers[hid];
- if (cap->cc_dev == NULL)
- continue;
- db_printf("%-12s %4u %4u %08x %2u %2u\n"
- , device_get_nameunit(cap->cc_dev)
- , cap->cc_sessions
- , cap->cc_koperations
- , cap->cc_flags
- , cap->cc_qblocked
- , cap->cc_kqblocked
- );
- }
-}
-
-DB_SHOW_COMMAND(crypto, db_show_crypto)
-{
- struct cryptop *crp;
-
- db_show_drivers();
- db_printf("\n");
-
- db_printf("%4s %8s %4s %4s %4s %4s %8s %8s\n",
- "HID", "Caps", "Ilen", "Olen", "Etype", "Flags",
- "Desc", "Callback");
- TAILQ_FOREACH(crp, &crp_q, crp_next) {
- db_printf("%4u %08x %4u %4u %4u %04x %8p %8p\n"
- , (int) CRYPTO_SESID2HID(crp->crp_sid)
- , (int) CRYPTO_SESID2CAPS(crp->crp_sid)
- , crp->crp_ilen, crp->crp_olen
- , crp->crp_etype
- , crp->crp_flags
- , crp->crp_desc
- , crp->crp_callback
- );
- }
- if (!TAILQ_EMPTY(&crp_ret_q)) {
- db_printf("\n%4s %4s %4s %8s\n",
- "HID", "Etype", "Flags", "Callback");
- TAILQ_FOREACH(crp, &crp_ret_q, crp_next) {
- db_printf("%4u %4u %04x %8p\n"
- , (int) CRYPTO_SESID2HID(crp->crp_sid)
- , crp->crp_etype
- , crp->crp_flags
- , crp->crp_callback
- );
- }
- }
-}
-
-DB_SHOW_COMMAND(kcrypto, db_show_kcrypto)
-{
- struct cryptkop *krp;
-
- db_show_drivers();
- db_printf("\n");
-
- db_printf("%4s %5s %4s %4s %8s %4s %8s\n",
- "Op", "Status", "#IP", "#OP", "CRID", "HID", "Callback");
- TAILQ_FOREACH(krp, &crp_kq, krp_next) {
- db_printf("%4u %5u %4u %4u %08x %4u %8p\n"
- , krp->krp_op
- , krp->krp_status
- , krp->krp_iparams, krp->krp_oparams
- , krp->krp_crid, krp->krp_hid
- , krp->krp_callback
- );
- }
- if (!TAILQ_EMPTY(&crp_ret_q)) {
- db_printf("%4s %5s %8s %4s %8s\n",
- "Op", "Status", "CRID", "HID", "Callback");
- TAILQ_FOREACH(krp, &crp_ret_kq, krp_next) {
- db_printf("%4u %5u %08x %4u %8p\n"
- , krp->krp_op
- , krp->krp_status
- , krp->krp_crid, krp->krp_hid
- , krp->krp_callback
- );
- }
- }
-}
-#endif
-
-
-static int
-crypto_init(void)
-{
- int error;
-
- dprintk("%s(%p)\n", __FUNCTION__, (void *) crypto_init);
-
- if (crypto_initted)
- return 0;
- crypto_initted = 1;
-
- spin_lock_init(&crypto_drivers_lock);
- spin_lock_init(&crypto_q_lock);
- spin_lock_init(&crypto_ret_q_lock);
-
- cryptop_zone = kmem_cache_create("cryptop", sizeof(struct cryptop),
- 0, SLAB_HWCACHE_ALIGN, NULL
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
- , NULL
-#endif
- );
-
- cryptodesc_zone = kmem_cache_create("cryptodesc", sizeof(struct cryptodesc),
- 0, SLAB_HWCACHE_ALIGN, NULL
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
- , NULL
-#endif
- );
-
- if (cryptodesc_zone == NULL || cryptop_zone == NULL) {
- printk("crypto: crypto_init cannot setup crypto zones\n");
- error = ENOMEM;
- goto bad;
- }
-
- crypto_drivers_num = CRYPTO_DRIVERS_INITIAL;
- crypto_drivers = kmalloc(crypto_drivers_num * sizeof(struct cryptocap),
- GFP_KERNEL);
- if (crypto_drivers == NULL) {
- printk("crypto: crypto_init cannot setup crypto drivers\n");
- error = ENOMEM;
- goto bad;
- }
-
- memset(crypto_drivers, 0, crypto_drivers_num * sizeof(struct cryptocap));
-
- init_completion(&cryptoproc_exited);
- init_completion(&cryptoretproc_exited);
-
- cryptoproc = 0; /* to avoid race condition where proc runs first */
- cryptoproc = kernel_thread(crypto_proc, NULL, CLONE_FS|CLONE_FILES);
- if (cryptoproc < 0) {
- error = cryptoproc;
- printk("crypto: crypto_init cannot start crypto thread; error %d",
- error);
- goto bad;
- }
-
- cryptoretproc = 0; /* to avoid race condition where proc runs first */
- cryptoretproc = kernel_thread(crypto_ret_proc, NULL, CLONE_FS|CLONE_FILES);
- if (cryptoretproc < 0) {
- error = cryptoretproc;
- printk("crypto: crypto_init cannot start cryptoret thread; error %d",
- error);
- goto bad;
- }
-
- return 0;
-bad:
- crypto_exit();
- return error;
-}
-
-
-static void
-crypto_exit(void)
-{
- pid_t p;
- unsigned long d_flags;
-
- dprintk("%s()\n", __FUNCTION__);
-
- /*
- * Terminate any crypto threads.
- */
-
- CRYPTO_DRIVER_LOCK();
- p = cryptoproc;
- cryptoproc = (pid_t) -1;
- kill_proc(p, SIGTERM, 1);
- wake_up_interruptible(&cryptoproc_wait);
- CRYPTO_DRIVER_UNLOCK();
-
- wait_for_completion(&cryptoproc_exited);
-
- CRYPTO_DRIVER_LOCK();
- p = cryptoretproc;
- cryptoretproc = (pid_t) -1;
- kill_proc(p, SIGTERM, 1);
- wake_up_interruptible(&cryptoretproc_wait);
- CRYPTO_DRIVER_UNLOCK();
-
- wait_for_completion(&cryptoretproc_exited);
-
- /* XXX flush queues??? */
-
- /*
- * Reclaim dynamically allocated resources.
- */
- if (crypto_drivers != NULL)
- kfree(crypto_drivers);
-
- if (cryptodesc_zone != NULL)
- kmem_cache_destroy(cryptodesc_zone);
- if (cryptop_zone != NULL)
- kmem_cache_destroy(cryptop_zone);
-}
-
-
-EXPORT_SYMBOL(crypto_newsession);
-EXPORT_SYMBOL(crypto_freesession);
-EXPORT_SYMBOL(crypto_get_driverid);
-EXPORT_SYMBOL(crypto_kregister);
-EXPORT_SYMBOL(crypto_register);
-EXPORT_SYMBOL(crypto_unregister);
-EXPORT_SYMBOL(crypto_unregister_all);
-EXPORT_SYMBOL(crypto_unblock);
-EXPORT_SYMBOL(crypto_dispatch);
-EXPORT_SYMBOL(crypto_kdispatch);
-EXPORT_SYMBOL(crypto_freereq);
-EXPORT_SYMBOL(crypto_getreq);
-EXPORT_SYMBOL(crypto_done);
-EXPORT_SYMBOL(crypto_kdone);
-EXPORT_SYMBOL(crypto_getfeat);
-EXPORT_SYMBOL(crypto_userasymcrypto);
-EXPORT_SYMBOL(crypto_getcaps);
-EXPORT_SYMBOL(crypto_find_driver);
-EXPORT_SYMBOL(crypto_find_device_byhid);
-
-module_init(crypto_init);
-module_exit(crypto_exit);
-
-MODULE_LICENSE("BSD");
-MODULE_AUTHOR("David McCullough <david_mccullough@mcafee.com>");
-MODULE_DESCRIPTION("OCF (OpenBSD Cryptographic Framework)");
projects / openwrt / openwrt.git / blobdiff