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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright IBM Corp. 2001, 2018
- * Author(s): Robert Burroughs
- * Eric Rossman (edrossma@us.ibm.com)
- * Cornelia Huck <cornelia.huck@de.ibm.com>
- *
- * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
- * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
- * Ralph Wuerthner <rwuerthn@de.ibm.com>
- * MSGTYPE restruct: Holger Dengler <hd@linux.vnet.ibm.com>
- * Multiple device nodes: Harald Freudenberger <freude@linux.ibm.com>
- */
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/interrupt.h>
- #include <linux/miscdevice.h>
- #include <linux/fs.h>
- #include <linux/compat.h>
- #include <linux/slab.h>
- #include <linux/atomic.h>
- #include <linux/uaccess.h>
- #include <linux/hw_random.h>
- #include <linux/debugfs.h>
- #include <linux/cdev.h>
- #include <linux/ctype.h>
- #include <linux/capability.h>
- #include <asm/debug.h>
- #define CREATE_TRACE_POINTS
- #include <asm/trace/zcrypt.h>
- #include "zcrypt_api.h"
- #include "zcrypt_debug.h"
- #include "zcrypt_msgtype6.h"
- #include "zcrypt_msgtype50.h"
- #include "zcrypt_ccamisc.h"
- #include "zcrypt_ep11misc.h"
- /*
- * Module description.
- */
- MODULE_AUTHOR("IBM Corporation");
- MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \
- "Copyright IBM Corp. 2001, 2012");
- MODULE_LICENSE("GPL");
- /*
- * zcrypt tracepoint functions
- */
- EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req);
- EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep);
- static int zcrypt_hwrng_seed = 1;
- module_param_named(hwrng_seed, zcrypt_hwrng_seed, int, 0440);
- MODULE_PARM_DESC(hwrng_seed, "Turn on/off hwrng auto seed, default is 1 (on).");
- DEFINE_SPINLOCK(zcrypt_list_lock);
- LIST_HEAD(zcrypt_card_list);
- int zcrypt_device_count;
- static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
- static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0);
- atomic_t zcrypt_rescan_req = ATOMIC_INIT(0);
- EXPORT_SYMBOL(zcrypt_rescan_req);
- static LIST_HEAD(zcrypt_ops_list);
- /* Zcrypt related debug feature stuff. */
- debug_info_t *zcrypt_dbf_info;
- /**
- * Process a rescan of the transport layer.
- *
- * Returns 1, if the rescan has been processed, otherwise 0.
- */
- static inline int zcrypt_process_rescan(void)
- {
- if (atomic_read(&zcrypt_rescan_req)) {
- atomic_set(&zcrypt_rescan_req, 0);
- atomic_inc(&zcrypt_rescan_count);
- ap_bus_force_rescan();
- ZCRYPT_DBF(DBF_INFO, "rescan count=%07d\n",
- atomic_inc_return(&zcrypt_rescan_count));
- return 1;
- }
- return 0;
- }
- void zcrypt_msgtype_register(struct zcrypt_ops *zops)
- {
- list_add_tail(&zops->list, &zcrypt_ops_list);
- }
- void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
- {
- list_del_init(&zops->list);
- }
- struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
- {
- struct zcrypt_ops *zops;
- list_for_each_entry(zops, &zcrypt_ops_list, list)
- if ((zops->variant == variant) &&
- (!strncmp(zops->name, name, sizeof(zops->name))))
- return zops;
- return NULL;
- }
- EXPORT_SYMBOL(zcrypt_msgtype);
- /*
- * Multi device nodes extension functions.
- */
- #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
- struct zcdn_device;
- static struct class *zcrypt_class;
- static dev_t zcrypt_devt;
- static struct cdev zcrypt_cdev;
- struct zcdn_device {
- struct device device;
- struct ap_perms perms;
- };
- #define to_zcdn_dev(x) container_of((x), struct zcdn_device, device)
- #define ZCDN_MAX_NAME 32
- static int zcdn_create(const char *name);
- static int zcdn_destroy(const char *name);
- /*
- * Find zcdn device by name.
- * Returns reference to the zcdn device which needs to be released
- * with put_device() after use.
- */
- static inline struct zcdn_device *find_zcdndev_by_name(const char *name)
- {
- struct device *dev = class_find_device_by_name(zcrypt_class, name);
- return dev ? to_zcdn_dev(dev) : NULL;
- }
- /*
- * Find zcdn device by devt value.
- * Returns reference to the zcdn device which needs to be released
- * with put_device() after use.
- */
- static inline struct zcdn_device *find_zcdndev_by_devt(dev_t devt)
- {
- struct device *dev = class_find_device_by_devt(zcrypt_class, devt);
- return dev ? to_zcdn_dev(dev) : NULL;
- }
- static ssize_t ioctlmask_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
- {
- int i, rc;
- struct zcdn_device *zcdndev = to_zcdn_dev(dev);
- if (mutex_lock_interruptible(&ap_perms_mutex))
- return -ERESTARTSYS;
- buf[0] = '0';
- buf[1] = 'x';
- for (i = 0; i < sizeof(zcdndev->perms.ioctlm) / sizeof(long); i++)
- snprintf(buf + 2 + 2 * i * sizeof(long),
- PAGE_SIZE - 2 - 2 * i * sizeof(long),
- "%016lx", zcdndev->perms.ioctlm[i]);
- buf[2 + 2 * i * sizeof(long)] = '\n';
- buf[2 + 2 * i * sizeof(long) + 1] = '\0';
- rc = 2 + 2 * i * sizeof(long) + 1;
- mutex_unlock(&ap_perms_mutex);
- return rc;
- }
- static ssize_t ioctlmask_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
- {
- int rc;
- struct zcdn_device *zcdndev = to_zcdn_dev(dev);
- rc = ap_parse_mask_str(buf, zcdndev->perms.ioctlm,
- AP_IOCTLS, &ap_perms_mutex);
- if (rc)
- return rc;
- return count;
- }
- static DEVICE_ATTR_RW(ioctlmask);
- static ssize_t apmask_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
- {
- int i, rc;
- struct zcdn_device *zcdndev = to_zcdn_dev(dev);
- if (mutex_lock_interruptible(&ap_perms_mutex))
- return -ERESTARTSYS;
- buf[0] = '0';
- buf[1] = 'x';
- for (i = 0; i < sizeof(zcdndev->perms.apm) / sizeof(long); i++)
- snprintf(buf + 2 + 2 * i * sizeof(long),
- PAGE_SIZE - 2 - 2 * i * sizeof(long),
- "%016lx", zcdndev->perms.apm[i]);
- buf[2 + 2 * i * sizeof(long)] = '\n';
- buf[2 + 2 * i * sizeof(long) + 1] = '\0';
- rc = 2 + 2 * i * sizeof(long) + 1;
- mutex_unlock(&ap_perms_mutex);
- return rc;
- }
- static ssize_t apmask_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
- {
- int rc;
- struct zcdn_device *zcdndev = to_zcdn_dev(dev);
- rc = ap_parse_mask_str(buf, zcdndev->perms.apm,
- AP_DEVICES, &ap_perms_mutex);
- if (rc)
- return rc;
- return count;
- }
- static DEVICE_ATTR_RW(apmask);
- static ssize_t aqmask_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
- {
- int i, rc;
- struct zcdn_device *zcdndev = to_zcdn_dev(dev);
- if (mutex_lock_interruptible(&ap_perms_mutex))
- return -ERESTARTSYS;
- buf[0] = '0';
- buf[1] = 'x';
- for (i = 0; i < sizeof(zcdndev->perms.aqm) / sizeof(long); i++)
- snprintf(buf + 2 + 2 * i * sizeof(long),
- PAGE_SIZE - 2 - 2 * i * sizeof(long),
- "%016lx", zcdndev->perms.aqm[i]);
- buf[2 + 2 * i * sizeof(long)] = '\n';
- buf[2 + 2 * i * sizeof(long) + 1] = '\0';
- rc = 2 + 2 * i * sizeof(long) + 1;
- mutex_unlock(&ap_perms_mutex);
- return rc;
- }
- static ssize_t aqmask_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
- {
- int rc;
- struct zcdn_device *zcdndev = to_zcdn_dev(dev);
- rc = ap_parse_mask_str(buf, zcdndev->perms.aqm,
- AP_DOMAINS, &ap_perms_mutex);
- if (rc)
- return rc;
- return count;
- }
- static DEVICE_ATTR_RW(aqmask);
- static struct attribute *zcdn_dev_attrs[] = {
- &dev_attr_ioctlmask.attr,
- &dev_attr_apmask.attr,
- &dev_attr_aqmask.attr,
- NULL
- };
- static struct attribute_group zcdn_dev_attr_group = {
- .attrs = zcdn_dev_attrs
- };
- static const struct attribute_group *zcdn_dev_attr_groups[] = {
- &zcdn_dev_attr_group,
- NULL
- };
- static ssize_t zcdn_create_store(struct class *class,
- struct class_attribute *attr,
- const char *buf, size_t count)
- {
- int rc;
- char name[ZCDN_MAX_NAME];
- strncpy(name, skip_spaces(buf), sizeof(name));
- name[sizeof(name) - 1] = '\0';
- rc = zcdn_create(strim(name));
- return rc ? rc : count;
- }
- static const struct class_attribute class_attr_zcdn_create =
- __ATTR(create, 0600, NULL, zcdn_create_store);
- static ssize_t zcdn_destroy_store(struct class *class,
- struct class_attribute *attr,
- const char *buf, size_t count)
- {
- int rc;
- char name[ZCDN_MAX_NAME];
- strncpy(name, skip_spaces(buf), sizeof(name));
- name[sizeof(name) - 1] = '\0';
- rc = zcdn_destroy(strim(name));
- return rc ? rc : count;
- }
- static const struct class_attribute class_attr_zcdn_destroy =
- __ATTR(destroy, 0600, NULL, zcdn_destroy_store);
- static void zcdn_device_release(struct device *dev)
- {
- struct zcdn_device *zcdndev = to_zcdn_dev(dev);
- ZCRYPT_DBF(DBF_INFO, "releasing zcdn device %d:%d\n",
- MAJOR(dev->devt), MINOR(dev->devt));
- kfree(zcdndev);
- }
- static int zcdn_create(const char *name)
- {
- dev_t devt;
- int i, rc = 0;
- char nodename[ZCDN_MAX_NAME];
- struct zcdn_device *zcdndev;
- if (mutex_lock_interruptible(&ap_perms_mutex))
- return -ERESTARTSYS;
- /* check if device node with this name already exists */
- if (name[0]) {
- zcdndev = find_zcdndev_by_name(name);
- if (zcdndev) {
- put_device(&zcdndev->device);
- rc = -EEXIST;
- goto unlockout;
- }
- }
- /* find an unused minor number */
- for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
- devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
- zcdndev = find_zcdndev_by_devt(devt);
- if (zcdndev)
- put_device(&zcdndev->device);
- else
- break;
- }
- if (i == ZCRYPT_MAX_MINOR_NODES) {
- rc = -ENOSPC;
- goto unlockout;
- }
- /* alloc and prepare a new zcdn device */
- zcdndev = kzalloc(sizeof(*zcdndev), GFP_KERNEL);
- if (!zcdndev) {
- rc = -ENOMEM;
- goto unlockout;
- }
- zcdndev->device.release = zcdn_device_release;
- zcdndev->device.class = zcrypt_class;
- zcdndev->device.devt = devt;
- zcdndev->device.groups = zcdn_dev_attr_groups;
- if (name[0])
- strncpy(nodename, name, sizeof(nodename));
- else
- snprintf(nodename, sizeof(nodename),
- ZCRYPT_NAME "_%d", (int) MINOR(devt));
- nodename[sizeof(nodename)-1] = '\0';
- if (dev_set_name(&zcdndev->device, nodename)) {
- rc = -EINVAL;
- goto unlockout;
- }
- rc = device_register(&zcdndev->device);
- if (rc) {
- put_device(&zcdndev->device);
- goto unlockout;
- }
- ZCRYPT_DBF(DBF_INFO, "created zcdn device %d:%d\n",
- MAJOR(devt), MINOR(devt));
- unlockout:
- mutex_unlock(&ap_perms_mutex);
- return rc;
- }
- static int zcdn_destroy(const char *name)
- {
- int rc = 0;
- struct zcdn_device *zcdndev;
- if (mutex_lock_interruptible(&ap_perms_mutex))
- return -ERESTARTSYS;
- /* try to find this zcdn device */
- zcdndev = find_zcdndev_by_name(name);
- if (!zcdndev) {
- rc = -ENOENT;
- goto unlockout;
- }
- /*
- * The zcdn device is not hard destroyed. It is subject to
- * reference counting and thus just needs to be unregistered.
- */
- put_device(&zcdndev->device);
- device_unregister(&zcdndev->device);
- unlockout:
- mutex_unlock(&ap_perms_mutex);
- return rc;
- }
- static void zcdn_destroy_all(void)
- {
- int i;
- dev_t devt;
- struct zcdn_device *zcdndev;
- mutex_lock(&ap_perms_mutex);
- for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
- devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
- zcdndev = find_zcdndev_by_devt(devt);
- if (zcdndev) {
- put_device(&zcdndev->device);
- device_unregister(&zcdndev->device);
- }
- }
- mutex_unlock(&ap_perms_mutex);
- }
- #endif
- /**
- * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
- *
- * This function is not supported beyond zcrypt 1.3.1.
- */
- static ssize_t zcrypt_read(struct file *filp, char __user *buf,
- size_t count, loff_t *f_pos)
- {
- return -EPERM;
- }
- /**
- * zcrypt_write(): Not allowed.
- *
- * Write is is not allowed
- */
- static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
- size_t count, loff_t *f_pos)
- {
- return -EPERM;
- }
- /**
- * zcrypt_open(): Count number of users.
- *
- * Device open function to count number of users.
- */
- static int zcrypt_open(struct inode *inode, struct file *filp)
- {
- struct ap_perms *perms = &ap_perms;
- #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
- if (filp->f_inode->i_cdev == &zcrypt_cdev) {
- struct zcdn_device *zcdndev;
- if (mutex_lock_interruptible(&ap_perms_mutex))
- return -ERESTARTSYS;
- zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
- /* find returns a reference, no get_device() needed */
- mutex_unlock(&ap_perms_mutex);
- if (zcdndev)
- perms = &zcdndev->perms;
- }
- #endif
- filp->private_data = (void *) perms;
- atomic_inc(&zcrypt_open_count);
- return stream_open(inode, filp);
- }
- /**
- * zcrypt_release(): Count number of users.
- *
- * Device close function to count number of users.
- */
- static int zcrypt_release(struct inode *inode, struct file *filp)
- {
- #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
- if (filp->f_inode->i_cdev == &zcrypt_cdev) {
- struct zcdn_device *zcdndev;
- mutex_lock(&ap_perms_mutex);
- zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
- mutex_unlock(&ap_perms_mutex);
- if (zcdndev) {
- /* 2 puts here: one for find, one for open */
- put_device(&zcdndev->device);
- put_device(&zcdndev->device);
- }
- }
- #endif
- atomic_dec(&zcrypt_open_count);
- return 0;
- }
- static inline int zcrypt_check_ioctl(struct ap_perms *perms,
- unsigned int cmd)
- {
- int rc = -EPERM;
- int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT;
- if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) {
- if (test_bit_inv(ioctlnr, perms->ioctlm))
- rc = 0;
- }
- if (rc)
- ZCRYPT_DBF(DBF_WARN,
- "ioctl check failed: ioctlnr=0x%04x rc=%d\n",
- ioctlnr, rc);
- return rc;
- }
- static inline bool zcrypt_check_card(struct ap_perms *perms, int card)
- {
- return test_bit_inv(card, perms->apm) ? true : false;
- }
- static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue)
- {
- return test_bit_inv(queue, perms->aqm) ? true : false;
- }
- static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
- struct zcrypt_queue *zq,
- struct module **pmod,
- unsigned int weight)
- {
- if (!zq || !try_module_get(zq->queue->ap_dev.drv->driver.owner))
- return NULL;
- zcrypt_queue_get(zq);
- get_device(&zq->queue->ap_dev.device);
- atomic_add(weight, &zc->load);
- atomic_add(weight, &zq->load);
- zq->request_count++;
- *pmod = zq->queue->ap_dev.drv->driver.owner;
- return zq;
- }
- static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
- struct zcrypt_queue *zq,
- struct module *mod,
- unsigned int weight)
- {
- zq->request_count--;
- atomic_sub(weight, &zc->load);
- atomic_sub(weight, &zq->load);
- put_device(&zq->queue->ap_dev.device);
- zcrypt_queue_put(zq);
- module_put(mod);
- }
- static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
- struct zcrypt_card *pref_zc,
- unsigned int weight,
- unsigned int pref_weight)
- {
- if (!pref_zc)
- return true;
- weight += atomic_read(&zc->load);
- pref_weight += atomic_read(&pref_zc->load);
- if (weight == pref_weight)
- return atomic64_read(&zc->card->total_request_count) <
- atomic64_read(&pref_zc->card->total_request_count);
- return weight < pref_weight;
- }
- static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
- struct zcrypt_queue *pref_zq,
- unsigned int weight,
- unsigned int pref_weight)
- {
- if (!pref_zq)
- return true;
- weight += atomic_read(&zq->load);
- pref_weight += atomic_read(&pref_zq->load);
- if (weight == pref_weight)
- return zq->queue->total_request_count <
- pref_zq->queue->total_request_count;
- return weight < pref_weight;
- }
- /*
- * zcrypt ioctls.
- */
- static long zcrypt_rsa_modexpo(struct ap_perms *perms,
- struct zcrypt_track *tr,
- struct ica_rsa_modexpo *mex)
- {
- struct zcrypt_card *zc, *pref_zc;
- struct zcrypt_queue *zq, *pref_zq;
- struct ap_message ap_msg;
- unsigned int wgt = 0, pref_wgt = 0;
- unsigned int func_code;
- int cpen, qpen, qid = 0, rc = -ENODEV;
- struct module *mod;
- trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
- ap_init_message(&ap_msg);
- #ifdef CONFIG_ZCRYPT_DEBUG
- if (tr && tr->fi.cmd)
- ap_msg.fi.cmd = tr->fi.cmd;
- #endif
- if (mex->outputdatalength < mex->inputdatalength) {
- func_code = 0;
- rc = -EINVAL;
- goto out;
- }
- /*
- * As long as outputdatalength is big enough, we can set the
- * outputdatalength equal to the inputdatalength, since that is the
- * number of bytes we will copy in any case
- */
- mex->outputdatalength = mex->inputdatalength;
- rc = get_rsa_modex_fc(mex, &func_code);
- if (rc)
- goto out;
- pref_zc = NULL;
- pref_zq = NULL;
- spin_lock(&zcrypt_list_lock);
- for_each_zcrypt_card(zc) {
- /* Check for useable accelarator or CCA card */
- if (!zc->online || !zc->card->config ||
- !(zc->card->functions & 0x18000000))
- continue;
- /* Check for size limits */
- if (zc->min_mod_size > mex->inputdatalength ||
- zc->max_mod_size < mex->inputdatalength)
- continue;
- /* check if device node has admission for this card */
- if (!zcrypt_check_card(perms, zc->card->id))
- continue;
- /* get weight index of the card device */
- wgt = zc->speed_rating[func_code];
- /* penalty if this msg was previously sent via this card */
- cpen = (tr && tr->again_counter && tr->last_qid &&
- AP_QID_CARD(tr->last_qid) == zc->card->id) ?
- TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
- if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
- continue;
- for_each_zcrypt_queue(zq, zc) {
- /* check if device is useable and eligible */
- if (!zq->online || !zq->ops->rsa_modexpo ||
- !zq->queue->config)
- continue;
- /* check if device node has admission for this queue */
- if (!zcrypt_check_queue(perms,
- AP_QID_QUEUE(zq->queue->qid)))
- continue;
- /* penalty if the msg was previously sent at this qid */
- qpen = (tr && tr->again_counter && tr->last_qid &&
- tr->last_qid == zq->queue->qid) ?
- TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
- if (!zcrypt_queue_compare(zq, pref_zq,
- wgt + cpen + qpen, pref_wgt))
- continue;
- pref_zc = zc;
- pref_zq = zq;
- pref_wgt = wgt + cpen + qpen;
- }
- }
- pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
- spin_unlock(&zcrypt_list_lock);
- if (!pref_zq) {
- rc = -ENODEV;
- goto out;
- }
- qid = pref_zq->queue->qid;
- rc = pref_zq->ops->rsa_modexpo(pref_zq, mex, &ap_msg);
- spin_lock(&zcrypt_list_lock);
- zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
- spin_unlock(&zcrypt_list_lock);
- out:
- ap_release_message(&ap_msg);
- if (tr) {
- tr->last_rc = rc;
- tr->last_qid = qid;
- }
- trace_s390_zcrypt_rep(mex, func_code, rc,
- AP_QID_CARD(qid), AP_QID_QUEUE(qid));
- return rc;
- }
- static long zcrypt_rsa_crt(struct ap_perms *perms,
- struct zcrypt_track *tr,
- struct ica_rsa_modexpo_crt *crt)
- {
- struct zcrypt_card *zc, *pref_zc;
- struct zcrypt_queue *zq, *pref_zq;
- struct ap_message ap_msg;
- unsigned int wgt = 0, pref_wgt = 0;
- unsigned int func_code;
- int cpen, qpen, qid = 0, rc = -ENODEV;
- struct module *mod;
- trace_s390_zcrypt_req(crt, TP_ICARSACRT);
- ap_init_message(&ap_msg);
- #ifdef CONFIG_ZCRYPT_DEBUG
- if (tr && tr->fi.cmd)
- ap_msg.fi.cmd = tr->fi.cmd;
- #endif
- if (crt->outputdatalength < crt->inputdatalength) {
- func_code = 0;
- rc = -EINVAL;
- goto out;
- }
- /*
- * As long as outputdatalength is big enough, we can set the
- * outputdatalength equal to the inputdatalength, since that is the
- * number of bytes we will copy in any case
- */
- crt->outputdatalength = crt->inputdatalength;
- rc = get_rsa_crt_fc(crt, &func_code);
- if (rc)
- goto out;
- pref_zc = NULL;
- pref_zq = NULL;
- spin_lock(&zcrypt_list_lock);
- for_each_zcrypt_card(zc) {
- /* Check for useable accelarator or CCA card */
- if (!zc->online || !zc->card->config ||
- !(zc->card->functions & 0x18000000))
- continue;
- /* Check for size limits */
- if (zc->min_mod_size > crt->inputdatalength ||
- zc->max_mod_size < crt->inputdatalength)
- continue;
- /* check if device node has admission for this card */
- if (!zcrypt_check_card(perms, zc->card->id))
- continue;
- /* get weight index of the card device */
- wgt = zc->speed_rating[func_code];
- /* penalty if this msg was previously sent via this card */
- cpen = (tr && tr->again_counter && tr->last_qid &&
- AP_QID_CARD(tr->last_qid) == zc->card->id) ?
- TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
- if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
- continue;
- for_each_zcrypt_queue(zq, zc) {
- /* check if device is useable and eligible */
- if (!zq->online || !zq->ops->rsa_modexpo_crt ||
- !zq->queue->config)
- continue;
- /* check if device node has admission for this queue */
- if (!zcrypt_check_queue(perms,
- AP_QID_QUEUE(zq->queue->qid)))
- continue;
- /* penalty if the msg was previously sent at this qid */
- qpen = (tr && tr->again_counter && tr->last_qid &&
- tr->last_qid == zq->queue->qid) ?
- TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
- if (!zcrypt_queue_compare(zq, pref_zq,
- wgt + cpen + qpen, pref_wgt))
- continue;
- pref_zc = zc;
- pref_zq = zq;
- pref_wgt = wgt + cpen + qpen;
- }
- }
- pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
- spin_unlock(&zcrypt_list_lock);
- if (!pref_zq) {
- rc = -ENODEV;
- goto out;
- }
- qid = pref_zq->queue->qid;
- rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt, &ap_msg);
- spin_lock(&zcrypt_list_lock);
- zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
- spin_unlock(&zcrypt_list_lock);
- out:
- ap_release_message(&ap_msg);
- if (tr) {
- tr->last_rc = rc;
- tr->last_qid = qid;
- }
- trace_s390_zcrypt_rep(crt, func_code, rc,
- AP_QID_CARD(qid), AP_QID_QUEUE(qid));
- return rc;
- }
- static long _zcrypt_send_cprb(bool userspace, struct ap_perms *perms,
- struct zcrypt_track *tr,
- struct ica_xcRB *xcRB)
- {
- struct zcrypt_card *zc, *pref_zc;
- struct zcrypt_queue *zq, *pref_zq;
- struct ap_message ap_msg;
- unsigned int wgt = 0, pref_wgt = 0;
- unsigned int func_code;
- unsigned short *domain, tdom;
- int cpen, qpen, qid = 0, rc = -ENODEV;
- struct module *mod;
- trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
- xcRB->status = 0;
- ap_init_message(&ap_msg);
- #ifdef CONFIG_ZCRYPT_DEBUG
- if (tr && tr->fi.cmd)
- ap_msg.fi.cmd = tr->fi.cmd;
- if (tr && tr->fi.action == AP_FI_ACTION_CCA_AGENT_FF) {
- ZCRYPT_DBF_WARN("%s fi cmd 0x%04x: forcing invalid agent_ID 'FF'\n",
- __func__, tr->fi.cmd);
- xcRB->agent_ID = 0x4646;
- }
- #endif
- rc = get_cprb_fc(userspace, xcRB, &ap_msg, &func_code, &domain);
- if (rc)
- goto out;
- /*
- * If a valid target domain is set and this domain is NOT a usage
- * domain but a control only domain, use the default domain as target.
- */
- tdom = *domain;
- if (tdom < AP_DOMAINS &&
- !ap_test_config_usage_domain(tdom) &&
- ap_test_config_ctrl_domain(tdom) &&
- ap_domain_index >= 0)
- tdom = ap_domain_index;
- pref_zc = NULL;
- pref_zq = NULL;
- spin_lock(&zcrypt_list_lock);
- for_each_zcrypt_card(zc) {
- /* Check for useable CCA card */
- if (!zc->online || !zc->card->config ||
- !(zc->card->functions & 0x10000000))
- continue;
- /* Check for user selected CCA card */
- if (xcRB->user_defined != AUTOSELECT &&
- xcRB->user_defined != zc->card->id)
- continue;
- /* check if device node has admission for this card */
- if (!zcrypt_check_card(perms, zc->card->id))
- continue;
- /* get weight index of the card device */
- wgt = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
- /* penalty if this msg was previously sent via this card */
- cpen = (tr && tr->again_counter && tr->last_qid &&
- AP_QID_CARD(tr->last_qid) == zc->card->id) ?
- TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
- if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
- continue;
- for_each_zcrypt_queue(zq, zc) {
- /* check for device useable and eligible */
- if (!zq->online ||
- !zq->ops->send_cprb ||
- !zq->queue->config ||
- (tdom != AUTOSEL_DOM &&
- tdom != AP_QID_QUEUE(zq->queue->qid)))
- continue;
- /* check if device node has admission for this queue */
- if (!zcrypt_check_queue(perms,
- AP_QID_QUEUE(zq->queue->qid)))
- continue;
- /* penalty if the msg was previously sent at this qid */
- qpen = (tr && tr->again_counter && tr->last_qid &&
- tr->last_qid == zq->queue->qid) ?
- TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
- if (!zcrypt_queue_compare(zq, pref_zq,
- wgt + cpen + qpen, pref_wgt))
- continue;
- pref_zc = zc;
- pref_zq = zq;
- pref_wgt = wgt + cpen + qpen;
- }
- }
- pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
- spin_unlock(&zcrypt_list_lock);
- if (!pref_zq) {
- rc = -ENODEV;
- goto out;
- }
- /* in case of auto select, provide the correct domain */
- qid = pref_zq->queue->qid;
- if (*domain == AUTOSEL_DOM)
- *domain = AP_QID_QUEUE(qid);
- #ifdef CONFIG_ZCRYPT_DEBUG
- if (tr && tr->fi.action == AP_FI_ACTION_CCA_DOM_INVAL) {
- ZCRYPT_DBF_WARN("%s fi cmd 0x%04x: forcing invalid domain\n",
- __func__, tr->fi.cmd);
- *domain = 99;
- }
- #endif
- rc = pref_zq->ops->send_cprb(userspace, pref_zq, xcRB, &ap_msg);
- spin_lock(&zcrypt_list_lock);
- zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
- spin_unlock(&zcrypt_list_lock);
- out:
- ap_release_message(&ap_msg);
- if (tr) {
- tr->last_rc = rc;
- tr->last_qid = qid;
- }
- trace_s390_zcrypt_rep(xcRB, func_code, rc,
- AP_QID_CARD(qid), AP_QID_QUEUE(qid));
- return rc;
- }
- long zcrypt_send_cprb(struct ica_xcRB *xcRB)
- {
- return _zcrypt_send_cprb(false, &ap_perms, NULL, xcRB);
- }
- EXPORT_SYMBOL(zcrypt_send_cprb);
- static bool is_desired_ep11_card(unsigned int dev_id,
- unsigned short target_num,
- struct ep11_target_dev *targets)
- {
- while (target_num-- > 0) {
- if (targets->ap_id == dev_id || targets->ap_id == AUTOSEL_AP)
- return true;
- targets++;
- }
- return false;
- }
- static bool is_desired_ep11_queue(unsigned int dev_qid,
- unsigned short target_num,
- struct ep11_target_dev *targets)
- {
- int card = AP_QID_CARD(dev_qid), dom = AP_QID_QUEUE(dev_qid);
- while (target_num-- > 0) {
- if ((targets->ap_id == card || targets->ap_id == AUTOSEL_AP) &&
- (targets->dom_id == dom || targets->dom_id == AUTOSEL_DOM))
- return true;
- targets++;
- }
- return false;
- }
- static long _zcrypt_send_ep11_cprb(bool userspace, struct ap_perms *perms,
- struct zcrypt_track *tr,
- struct ep11_urb *xcrb)
- {
- struct zcrypt_card *zc, *pref_zc;
- struct zcrypt_queue *zq, *pref_zq;
- struct ep11_target_dev *targets;
- unsigned short target_num;
- unsigned int wgt = 0, pref_wgt = 0;
- unsigned int func_code;
- struct ap_message ap_msg;
- int cpen, qpen, qid = 0, rc = -ENODEV;
- struct module *mod;
- trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
- ap_init_message(&ap_msg);
- #ifdef CONFIG_ZCRYPT_DEBUG
- if (tr && tr->fi.cmd)
- ap_msg.fi.cmd = tr->fi.cmd;
- #endif
- target_num = (unsigned short) xcrb->targets_num;
- /* empty list indicates autoselect (all available targets) */
- targets = NULL;
- if (target_num != 0) {
- struct ep11_target_dev __user *uptr;
- targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
- if (!targets) {
- func_code = 0;
- rc = -ENOMEM;
- goto out;
- }
- uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
- if (z_copy_from_user(userspace, targets, uptr,
- target_num * sizeof(*targets))) {
- func_code = 0;
- rc = -EFAULT;
- goto out_free;
- }
- }
- rc = get_ep11cprb_fc(userspace, xcrb, &ap_msg, &func_code);
- if (rc)
- goto out_free;
- pref_zc = NULL;
- pref_zq = NULL;
- spin_lock(&zcrypt_list_lock);
- for_each_zcrypt_card(zc) {
- /* Check for useable EP11 card */
- if (!zc->online || !zc->card->config ||
- !(zc->card->functions & 0x04000000))
- continue;
- /* Check for user selected EP11 card */
- if (targets &&
- !is_desired_ep11_card(zc->card->id, target_num, targets))
- continue;
- /* check if device node has admission for this card */
- if (!zcrypt_check_card(perms, zc->card->id))
- continue;
- /* get weight index of the card device */
- wgt = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
- /* penalty if this msg was previously sent via this card */
- cpen = (tr && tr->again_counter && tr->last_qid &&
- AP_QID_CARD(tr->last_qid) == zc->card->id) ?
- TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
- if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
- continue;
- for_each_zcrypt_queue(zq, zc) {
- /* check if device is useable and eligible */
- if (!zq->online ||
- !zq->ops->send_ep11_cprb ||
- !zq->queue->config ||
- (targets &&
- !is_desired_ep11_queue(zq->queue->qid,
- target_num, targets)))
- continue;
- /* check if device node has admission for this queue */
- if (!zcrypt_check_queue(perms,
- AP_QID_QUEUE(zq->queue->qid)))
- continue;
- /* penalty if the msg was previously sent at this qid */
- qpen = (tr && tr->again_counter && tr->last_qid &&
- tr->last_qid == zq->queue->qid) ?
- TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
- if (!zcrypt_queue_compare(zq, pref_zq,
- wgt + cpen + qpen, pref_wgt))
- continue;
- pref_zc = zc;
- pref_zq = zq;
- pref_wgt = wgt + cpen + qpen;
- }
- }
- pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
- spin_unlock(&zcrypt_list_lock);
- if (!pref_zq) {
- rc = -ENODEV;
- goto out_free;
- }
- qid = pref_zq->queue->qid;
- rc = pref_zq->ops->send_ep11_cprb(userspace, pref_zq, xcrb, &ap_msg);
- spin_lock(&zcrypt_list_lock);
- zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
- spin_unlock(&zcrypt_list_lock);
- out_free:
- kfree(targets);
- out:
- ap_release_message(&ap_msg);
- if (tr) {
- tr->last_rc = rc;
- tr->last_qid = qid;
- }
- trace_s390_zcrypt_rep(xcrb, func_code, rc,
- AP_QID_CARD(qid), AP_QID_QUEUE(qid));
- return rc;
- }
- long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
- {
- return _zcrypt_send_ep11_cprb(false, &ap_perms, NULL, xcrb);
- }
- EXPORT_SYMBOL(zcrypt_send_ep11_cprb);
- static long zcrypt_rng(char *buffer)
- {
- struct zcrypt_card *zc, *pref_zc;
- struct zcrypt_queue *zq, *pref_zq;
- unsigned int wgt = 0, pref_wgt = 0;
- unsigned int func_code;
- struct ap_message ap_msg;
- unsigned int domain;
- int qid = 0, rc = -ENODEV;
- struct module *mod;
- trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
- ap_init_message(&ap_msg);
- rc = get_rng_fc(&ap_msg, &func_code, &domain);
- if (rc)
- goto out;
- pref_zc = NULL;
- pref_zq = NULL;
- spin_lock(&zcrypt_list_lock);
- for_each_zcrypt_card(zc) {
- /* Check for useable CCA card */
- if (!zc->online || !zc->card->config ||
- !(zc->card->functions & 0x10000000))
- continue;
- /* get weight index of the card device */
- wgt = zc->speed_rating[func_code];
- if (!zcrypt_card_compare(zc, pref_zc, wgt, pref_wgt))
- continue;
- for_each_zcrypt_queue(zq, zc) {
- /* check if device is useable and eligible */
- if (!zq->online || !zq->ops->rng ||
- !zq->queue->config)
- continue;
- if (!zcrypt_queue_compare(zq, pref_zq, wgt, pref_wgt))
- continue;
- pref_zc = zc;
- pref_zq = zq;
- pref_wgt = wgt;
- }
- }
- pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
- spin_unlock(&zcrypt_list_lock);
- if (!pref_zq) {
- rc = -ENODEV;
- goto out;
- }
- qid = pref_zq->queue->qid;
- rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
- spin_lock(&zcrypt_list_lock);
- zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
- spin_unlock(&zcrypt_list_lock);
- out:
- ap_release_message(&ap_msg);
- trace_s390_zcrypt_rep(buffer, func_code, rc,
- AP_QID_CARD(qid), AP_QID_QUEUE(qid));
- return rc;
- }
- static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
- {
- struct zcrypt_card *zc;
- struct zcrypt_queue *zq;
- struct zcrypt_device_status *stat;
- int card, queue;
- memset(devstatus, 0, MAX_ZDEV_ENTRIES
- * sizeof(struct zcrypt_device_status));
- spin_lock(&zcrypt_list_lock);
- for_each_zcrypt_card(zc) {
- for_each_zcrypt_queue(zq, zc) {
- card = AP_QID_CARD(zq->queue->qid);
- if (card >= MAX_ZDEV_CARDIDS)
- continue;
- queue = AP_QID_QUEUE(zq->queue->qid);
- stat = &devstatus[card * AP_DOMAINS + queue];
- stat->hwtype = zc->card->ap_dev.device_type;
- stat->functions = zc->card->functions >> 26;
- stat->qid = zq->queue->qid;
- stat->online = zq->online ? 0x01 : 0x00;
- }
- }
- spin_unlock(&zcrypt_list_lock);
- }
- void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
- {
- struct zcrypt_card *zc;
- struct zcrypt_queue *zq;
- struct zcrypt_device_status_ext *stat;
- int card, queue;
- memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
- * sizeof(struct zcrypt_device_status_ext));
- spin_lock(&zcrypt_list_lock);
- for_each_zcrypt_card(zc) {
- for_each_zcrypt_queue(zq, zc) {
- card = AP_QID_CARD(zq->queue->qid);
- queue = AP_QID_QUEUE(zq->queue->qid);
- stat = &devstatus[card * AP_DOMAINS + queue];
- stat->hwtype = zc->card->ap_dev.device_type;
- stat->functions = zc->card->functions >> 26;
- stat->qid = zq->queue->qid;
- stat->online = zq->online ? 0x01 : 0x00;
- }
- }
- spin_unlock(&zcrypt_list_lock);
- }
- EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
- int zcrypt_device_status_ext(int card, int queue,
- struct zcrypt_device_status_ext *devstat)
- {
- struct zcrypt_card *zc;
- struct zcrypt_queue *zq;
- memset(devstat, 0, sizeof(*devstat));
- spin_lock(&zcrypt_list_lock);
- for_each_zcrypt_card(zc) {
- for_each_zcrypt_queue(zq, zc) {
- if (card == AP_QID_CARD(zq->queue->qid) &&
- queue == AP_QID_QUEUE(zq->queue->qid)) {
- devstat->hwtype = zc->card->ap_dev.device_type;
- devstat->functions = zc->card->functions >> 26;
- devstat->qid = zq->queue->qid;
- devstat->online = zq->online ? 0x01 : 0x00;
- spin_unlock(&zcrypt_list_lock);
- return 0;
- }
- }
- }
- spin_unlock(&zcrypt_list_lock);
- return -ENODEV;
- }
- EXPORT_SYMBOL(zcrypt_device_status_ext);
- static void zcrypt_status_mask(char status[], size_t max_adapters)
- {
- struct zcrypt_card *zc;
- struct zcrypt_queue *zq;
- int card;
- memset(status, 0, max_adapters);
- spin_lock(&zcrypt_list_lock);
- for_each_zcrypt_card(zc) {
- for_each_zcrypt_queue(zq, zc) {
- card = AP_QID_CARD(zq->queue->qid);
- if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
- || card >= max_adapters)
- continue;
- status[card] = zc->online ? zc->user_space_type : 0x0d;
- }
- }
- spin_unlock(&zcrypt_list_lock);
- }
- static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
- {
- struct zcrypt_card *zc;
- struct zcrypt_queue *zq;
- int card;
- memset(qdepth, 0, max_adapters);
- spin_lock(&zcrypt_list_lock);
- local_bh_disable();
- for_each_zcrypt_card(zc) {
- for_each_zcrypt_queue(zq, zc) {
- card = AP_QID_CARD(zq->queue->qid);
- if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
- || card >= max_adapters)
- continue;
- spin_lock(&zq->queue->lock);
- qdepth[card] =
- zq->queue->pendingq_count +
- zq->queue->requestq_count;
- spin_unlock(&zq->queue->lock);
- }
- }
- local_bh_enable();
- spin_unlock(&zcrypt_list_lock);
- }
- static void zcrypt_perdev_reqcnt(u32 reqcnt[], size_t max_adapters)
- {
- struct zcrypt_card *zc;
- struct zcrypt_queue *zq;
- int card;
- u64 cnt;
- memset(reqcnt, 0, sizeof(int) * max_adapters);
- spin_lock(&zcrypt_list_lock);
- local_bh_disable();
- for_each_zcrypt_card(zc) {
- for_each_zcrypt_queue(zq, zc) {
- card = AP_QID_CARD(zq->queue->qid);
- if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
- || card >= max_adapters)
- continue;
- spin_lock(&zq->queue->lock);
- cnt = zq->queue->total_request_count;
- spin_unlock(&zq->queue->lock);
- reqcnt[card] = (cnt < UINT_MAX) ? (u32) cnt : UINT_MAX;
- }
- }
- local_bh_enable();
- spin_unlock(&zcrypt_list_lock);
- }
- static int zcrypt_pendingq_count(void)
- {
- struct zcrypt_card *zc;
- struct zcrypt_queue *zq;
- int pendingq_count;
- pendingq_count = 0;
- spin_lock(&zcrypt_list_lock);
- local_bh_disable();
- for_each_zcrypt_card(zc) {
- for_each_zcrypt_queue(zq, zc) {
- if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
- continue;
- spin_lock(&zq->queue->lock);
- pendingq_count += zq->queue->pendingq_count;
- spin_unlock(&zq->queue->lock);
- }
- }
- local_bh_enable();
- spin_unlock(&zcrypt_list_lock);
- return pendingq_count;
- }
- static int zcrypt_requestq_count(void)
- {
- struct zcrypt_card *zc;
- struct zcrypt_queue *zq;
- int requestq_count;
- requestq_count = 0;
- spin_lock(&zcrypt_list_lock);
- local_bh_disable();
- for_each_zcrypt_card(zc) {
- for_each_zcrypt_queue(zq, zc) {
- if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
- continue;
- spin_lock(&zq->queue->lock);
- requestq_count += zq->queue->requestq_count;
- spin_unlock(&zq->queue->lock);
- }
- }
- local_bh_enable();
- spin_unlock(&zcrypt_list_lock);
- return requestq_count;
- }
- static int icarsamodexpo_ioctl(struct ap_perms *perms, unsigned long arg)
- {
- int rc;
- struct zcrypt_track tr;
- struct ica_rsa_modexpo mex;
- struct ica_rsa_modexpo __user *umex = (void __user *) arg;
- memset(&tr, 0, sizeof(tr));
- if (copy_from_user(&mex, umex, sizeof(mex)))
- return -EFAULT;
- #ifdef CONFIG_ZCRYPT_DEBUG
- if (mex.inputdatalength & (1U << 31)) {
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
- tr.fi.cmd = (u16)(mex.inputdatalength >> 16);
- }
- mex.inputdatalength &= 0x0000FFFF;
- #endif
- do {
- rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
- if (rc == -EAGAIN)
- tr.again_counter++;
- #ifdef CONFIG_ZCRYPT_DEBUG
- if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
- break;
- #endif
- } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
- /* on failure: retry once again after a requested rescan */
- if ((rc == -ENODEV) && (zcrypt_process_rescan()))
- do {
- rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
- if (rc == -EAGAIN)
- tr.again_counter++;
- } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
- if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
- rc = -EIO;
- if (rc) {
- ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc);
- return rc;
- }
- return put_user(mex.outputdatalength, &umex->outputdatalength);
- }
- static int icarsacrt_ioctl(struct ap_perms *perms, unsigned long arg)
- {
- int rc;
- struct zcrypt_track tr;
- struct ica_rsa_modexpo_crt crt;
- struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
- memset(&tr, 0, sizeof(tr));
- if (copy_from_user(&crt, ucrt, sizeof(crt)))
- return -EFAULT;
- #ifdef CONFIG_ZCRYPT_DEBUG
- if (crt.inputdatalength & (1U << 31)) {
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
- tr.fi.cmd = (u16)(crt.inputdatalength >> 16);
- }
- crt.inputdatalength &= 0x0000FFFF;
- #endif
- do {
- rc = zcrypt_rsa_crt(perms, &tr, &crt);
- if (rc == -EAGAIN)
- tr.again_counter++;
- #ifdef CONFIG_ZCRYPT_DEBUG
- if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
- break;
- #endif
- } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
- /* on failure: retry once again after a requested rescan */
- if ((rc == -ENODEV) && (zcrypt_process_rescan()))
- do {
- rc = zcrypt_rsa_crt(perms, &tr, &crt);
- if (rc == -EAGAIN)
- tr.again_counter++;
- } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
- if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
- rc = -EIO;
- if (rc) {
- ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc);
- return rc;
- }
- return put_user(crt.outputdatalength, &ucrt->outputdatalength);
- }
- static int zsecsendcprb_ioctl(struct ap_perms *perms, unsigned long arg)
- {
- int rc;
- struct ica_xcRB xcRB;
- struct zcrypt_track tr;
- struct ica_xcRB __user *uxcRB = (void __user *) arg;
- memset(&tr, 0, sizeof(tr));
- if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
- return -EFAULT;
- #ifdef CONFIG_ZCRYPT_DEBUG
- if (xcRB.status & (1U << 31)) {
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
- tr.fi.cmd = (u16)(xcRB.status >> 16);
- }
- xcRB.status &= 0x0000FFFF;
- #endif
- do {
- rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB);
- if (rc == -EAGAIN)
- tr.again_counter++;
- #ifdef CONFIG_ZCRYPT_DEBUG
- if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
- break;
- #endif
- } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
- /* on failure: retry once again after a requested rescan */
- if ((rc == -ENODEV) && (zcrypt_process_rescan()))
- do {
- rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB);
- if (rc == -EAGAIN)
- tr.again_counter++;
- } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
- if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
- rc = -EIO;
- if (rc)
- ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d status=0x%x\n",
- rc, xcRB.status);
- if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
- return -EFAULT;
- return rc;
- }
- static int zsendep11cprb_ioctl(struct ap_perms *perms, unsigned long arg)
- {
- int rc;
- struct ep11_urb xcrb;
- struct zcrypt_track tr;
- struct ep11_urb __user *uxcrb = (void __user *)arg;
- memset(&tr, 0, sizeof(tr));
- if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
- return -EFAULT;
- #ifdef CONFIG_ZCRYPT_DEBUG
- if (xcrb.req_len & (1ULL << 63)) {
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
- tr.fi.cmd = (u16)(xcrb.req_len >> 48);
- }
- xcrb.req_len &= 0x0000FFFFFFFFFFFFULL;
- #endif
- do {
- rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
- if (rc == -EAGAIN)
- tr.again_counter++;
- #ifdef CONFIG_ZCRYPT_DEBUG
- if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
- break;
- #endif
- } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
- /* on failure: retry once again after a requested rescan */
- if ((rc == -ENODEV) && (zcrypt_process_rescan()))
- do {
- rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
- if (rc == -EAGAIN)
- tr.again_counter++;
- } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
- if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
- rc = -EIO;
- if (rc)
- ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc);
- if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
- return -EFAULT;
- return rc;
- }
- static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
- unsigned long arg)
- {
- int rc;
- struct ap_perms *perms =
- (struct ap_perms *) filp->private_data;
- rc = zcrypt_check_ioctl(perms, cmd);
- if (rc)
- return rc;
- switch (cmd) {
- case ICARSAMODEXPO:
- return icarsamodexpo_ioctl(perms, arg);
- case ICARSACRT:
- return icarsacrt_ioctl(perms, arg);
- case ZSECSENDCPRB:
- return zsecsendcprb_ioctl(perms, arg);
- case ZSENDEP11CPRB:
- return zsendep11cprb_ioctl(perms, arg);
- case ZCRYPT_DEVICE_STATUS: {
- struct zcrypt_device_status_ext *device_status;
- size_t total_size = MAX_ZDEV_ENTRIES_EXT
- * sizeof(struct zcrypt_device_status_ext);
- device_status = kzalloc(total_size, GFP_KERNEL);
- if (!device_status)
- return -ENOMEM;
- zcrypt_device_status_mask_ext(device_status);
- if (copy_to_user((char __user *) arg, device_status,
- total_size))
- rc = -EFAULT;
- kfree(device_status);
- return rc;
- }
- case ZCRYPT_STATUS_MASK: {
- char status[AP_DEVICES];
- zcrypt_status_mask(status, AP_DEVICES);
- if (copy_to_user((char __user *) arg, status, sizeof(status)))
- return -EFAULT;
- return 0;
- }
- case ZCRYPT_QDEPTH_MASK: {
- char qdepth[AP_DEVICES];
- zcrypt_qdepth_mask(qdepth, AP_DEVICES);
- if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
- return -EFAULT;
- return 0;
- }
- case ZCRYPT_PERDEV_REQCNT: {
- u32 *reqcnt;
- reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL);
- if (!reqcnt)
- return -ENOMEM;
- zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
- if (copy_to_user((int __user *) arg, reqcnt,
- sizeof(u32) * AP_DEVICES))
- rc = -EFAULT;
- kfree(reqcnt);
- return rc;
- }
- case Z90STAT_REQUESTQ_COUNT:
- return put_user(zcrypt_requestq_count(), (int __user *) arg);
- case Z90STAT_PENDINGQ_COUNT:
- return put_user(zcrypt_pendingq_count(), (int __user *) arg);
- case Z90STAT_TOTALOPEN_COUNT:
- return put_user(atomic_read(&zcrypt_open_count),
- (int __user *) arg);
- case Z90STAT_DOMAIN_INDEX:
- return put_user(ap_domain_index, (int __user *) arg);
- /*
- * Deprecated ioctls
- */
- case ZDEVICESTATUS: {
- /* the old ioctl supports only 64 adapters */
- struct zcrypt_device_status *device_status;
- size_t total_size = MAX_ZDEV_ENTRIES
- * sizeof(struct zcrypt_device_status);
- device_status = kzalloc(total_size, GFP_KERNEL);
- if (!device_status)
- return -ENOMEM;
- zcrypt_device_status_mask(device_status);
- if (copy_to_user((char __user *) arg, device_status,
- total_size))
- rc = -EFAULT;
- kfree(device_status);
- return rc;
- }
- case Z90STAT_STATUS_MASK: {
- /* the old ioctl supports only 64 adapters */
- char status[MAX_ZDEV_CARDIDS];
- zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
- if (copy_to_user((char __user *) arg, status, sizeof(status)))
- return -EFAULT;
- return 0;
- }
- case Z90STAT_QDEPTH_MASK: {
- /* the old ioctl supports only 64 adapters */
- char qdepth[MAX_ZDEV_CARDIDS];
- zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
- if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
- return -EFAULT;
- return 0;
- }
- case Z90STAT_PERDEV_REQCNT: {
- /* the old ioctl supports only 64 adapters */
- u32 reqcnt[MAX_ZDEV_CARDIDS];
- zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
- if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
- return -EFAULT;
- return 0;
- }
- /* unknown ioctl number */
- default:
- ZCRYPT_DBF(DBF_DEBUG, "unknown ioctl 0x%08x\n", cmd);
- return -ENOIOCTLCMD;
- }
- }
- #ifdef CONFIG_COMPAT
- /*
- * ioctl32 conversion routines
- */
- struct compat_ica_rsa_modexpo {
- compat_uptr_t inputdata;
- unsigned int inputdatalength;
- compat_uptr_t outputdata;
- unsigned int outputdatalength;
- compat_uptr_t b_key;
- compat_uptr_t n_modulus;
- };
- static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
- unsigned int cmd, unsigned long arg)
- {
- struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
- struct compat_ica_rsa_modexpo mex32;
- struct ica_rsa_modexpo mex64;
- struct zcrypt_track tr;
- long rc;
- memset(&tr, 0, sizeof(tr));
- if (copy_from_user(&mex32, umex32, sizeof(mex32)))
- return -EFAULT;
- mex64.inputdata = compat_ptr(mex32.inputdata);
- mex64.inputdatalength = mex32.inputdatalength;
- mex64.outputdata = compat_ptr(mex32.outputdata);
- mex64.outputdatalength = mex32.outputdatalength;
- mex64.b_key = compat_ptr(mex32.b_key);
- mex64.n_modulus = compat_ptr(mex32.n_modulus);
- do {
- rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
- if (rc == -EAGAIN)
- tr.again_counter++;
- } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
- /* on failure: retry once again after a requested rescan */
- if ((rc == -ENODEV) && (zcrypt_process_rescan()))
- do {
- rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
- if (rc == -EAGAIN)
- tr.again_counter++;
- } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
- if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
- rc = -EIO;
- if (rc)
- return rc;
- return put_user(mex64.outputdatalength,
- &umex32->outputdatalength);
- }
- struct compat_ica_rsa_modexpo_crt {
- compat_uptr_t inputdata;
- unsigned int inputdatalength;
- compat_uptr_t outputdata;
- unsigned int outputdatalength;
- compat_uptr_t bp_key;
- compat_uptr_t bq_key;
- compat_uptr_t np_prime;
- compat_uptr_t nq_prime;
- compat_uptr_t u_mult_inv;
- };
- static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
- unsigned int cmd, unsigned long arg)
- {
- struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
- struct compat_ica_rsa_modexpo_crt crt32;
- struct ica_rsa_modexpo_crt crt64;
- struct zcrypt_track tr;
- long rc;
- memset(&tr, 0, sizeof(tr));
- if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
- return -EFAULT;
- crt64.inputdata = compat_ptr(crt32.inputdata);
- crt64.inputdatalength = crt32.inputdatalength;
- crt64.outputdata = compat_ptr(crt32.outputdata);
- crt64.outputdatalength = crt32.outputdatalength;
- crt64.bp_key = compat_ptr(crt32.bp_key);
- crt64.bq_key = compat_ptr(crt32.bq_key);
- crt64.np_prime = compat_ptr(crt32.np_prime);
- crt64.nq_prime = compat_ptr(crt32.nq_prime);
- crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
- do {
- rc = zcrypt_rsa_crt(perms, &tr, &crt64);
- if (rc == -EAGAIN)
- tr.again_counter++;
- } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
- /* on failure: retry once again after a requested rescan */
- if ((rc == -ENODEV) && (zcrypt_process_rescan()))
- do {
- rc = zcrypt_rsa_crt(perms, &tr, &crt64);
- if (rc == -EAGAIN)
- tr.again_counter++;
- } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
- if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
- rc = -EIO;
- if (rc)
- return rc;
- return put_user(crt64.outputdatalength,
- &ucrt32->outputdatalength);
- }
- struct compat_ica_xcRB {
- unsigned short agent_ID;
- unsigned int user_defined;
- unsigned short request_ID;
- unsigned int request_control_blk_length;
- unsigned char padding1[16 - sizeof(compat_uptr_t)];
- compat_uptr_t request_control_blk_addr;
- unsigned int request_data_length;
- char padding2[16 - sizeof(compat_uptr_t)];
- compat_uptr_t request_data_address;
- unsigned int reply_control_blk_length;
- char padding3[16 - sizeof(compat_uptr_t)];
- compat_uptr_t reply_control_blk_addr;
- unsigned int reply_data_length;
- char padding4[16 - sizeof(compat_uptr_t)];
- compat_uptr_t reply_data_addr;
- unsigned short priority_window;
- unsigned int status;
- } __packed;
- static long trans_xcRB32(struct ap_perms *perms, struct file *filp,
- unsigned int cmd, unsigned long arg)
- {
- struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
- struct compat_ica_xcRB xcRB32;
- struct zcrypt_track tr;
- struct ica_xcRB xcRB64;
- long rc;
- memset(&tr, 0, sizeof(tr));
- if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
- return -EFAULT;
- xcRB64.agent_ID = xcRB32.agent_ID;
- xcRB64.user_defined = xcRB32.user_defined;
- xcRB64.request_ID = xcRB32.request_ID;
- xcRB64.request_control_blk_length =
- xcRB32.request_control_blk_length;
- xcRB64.request_control_blk_addr =
- compat_ptr(xcRB32.request_control_blk_addr);
- xcRB64.request_data_length =
- xcRB32.request_data_length;
- xcRB64.request_data_address =
- compat_ptr(xcRB32.request_data_address);
- xcRB64.reply_control_blk_length =
- xcRB32.reply_control_blk_length;
- xcRB64.reply_control_blk_addr =
- compat_ptr(xcRB32.reply_control_blk_addr);
- xcRB64.reply_data_length = xcRB32.reply_data_length;
- xcRB64.reply_data_addr =
- compat_ptr(xcRB32.reply_data_addr);
- xcRB64.priority_window = xcRB32.priority_window;
- xcRB64.status = xcRB32.status;
- do {
- rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB64);
- if (rc == -EAGAIN)
- tr.again_counter++;
- } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
- /* on failure: retry once again after a requested rescan */
- if ((rc == -ENODEV) && (zcrypt_process_rescan()))
- do {
- rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB64);
- if (rc == -EAGAIN)
- tr.again_counter++;
- } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
- if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
- rc = -EIO;
- xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
- xcRB32.reply_data_length = xcRB64.reply_data_length;
- xcRB32.status = xcRB64.status;
- if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
- return -EFAULT;
- return rc;
- }
- static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
- unsigned long arg)
- {
- int rc;
- struct ap_perms *perms =
- (struct ap_perms *) filp->private_data;
- rc = zcrypt_check_ioctl(perms, cmd);
- if (rc)
- return rc;
- if (cmd == ICARSAMODEXPO)
- return trans_modexpo32(perms, filp, cmd, arg);
- if (cmd == ICARSACRT)
- return trans_modexpo_crt32(perms, filp, cmd, arg);
- if (cmd == ZSECSENDCPRB)
- return trans_xcRB32(perms, filp, cmd, arg);
- return zcrypt_unlocked_ioctl(filp, cmd, arg);
- }
- #endif
- /*
- * Misc device file operations.
- */
- static const struct file_operations zcrypt_fops = {
- .owner = THIS_MODULE,
- .read = zcrypt_read,
- .write = zcrypt_write,
- .unlocked_ioctl = zcrypt_unlocked_ioctl,
- #ifdef CONFIG_COMPAT
- .compat_ioctl = zcrypt_compat_ioctl,
- #endif
- .open = zcrypt_open,
- .release = zcrypt_release,
- .llseek = no_llseek,
- };
- /*
- * Misc device.
- */
- static struct miscdevice zcrypt_misc_device = {
- .minor = MISC_DYNAMIC_MINOR,
- .name = "z90crypt",
- .fops = &zcrypt_fops,
- };
- static int zcrypt_rng_device_count;
- static u32 *zcrypt_rng_buffer;
- static int zcrypt_rng_buffer_index;
- static DEFINE_MUTEX(zcrypt_rng_mutex);
- static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
- {
- int rc;
- /*
- * We don't need locking here because the RNG API guarantees serialized
- * read method calls.
- */
- if (zcrypt_rng_buffer_index == 0) {
- rc = zcrypt_rng((char *) zcrypt_rng_buffer);
- /* on failure: retry once again after a requested rescan */
- if ((rc == -ENODEV) && (zcrypt_process_rescan()))
- rc = zcrypt_rng((char *) zcrypt_rng_buffer);
- if (rc < 0)
- return -EIO;
- zcrypt_rng_buffer_index = rc / sizeof(*data);
- }
- *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
- return sizeof(*data);
- }
- static struct hwrng zcrypt_rng_dev = {
- .name = "zcrypt",
- .data_read = zcrypt_rng_data_read,
- .quality = 990,
- };
- int zcrypt_rng_device_add(void)
- {
- int rc = 0;
- mutex_lock(&zcrypt_rng_mutex);
- if (zcrypt_rng_device_count == 0) {
- zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
- if (!zcrypt_rng_buffer) {
- rc = -ENOMEM;
- goto out;
- }
- zcrypt_rng_buffer_index = 0;
- if (!zcrypt_hwrng_seed)
- zcrypt_rng_dev.quality = 0;
- rc = hwrng_register(&zcrypt_rng_dev);
- if (rc)
- goto out_free;
- zcrypt_rng_device_count = 1;
- } else
- zcrypt_rng_device_count++;
- mutex_unlock(&zcrypt_rng_mutex);
- return 0;
- out_free:
- free_page((unsigned long) zcrypt_rng_buffer);
- out:
- mutex_unlock(&zcrypt_rng_mutex);
- return rc;
- }
- void zcrypt_rng_device_remove(void)
- {
- mutex_lock(&zcrypt_rng_mutex);
- zcrypt_rng_device_count--;
- if (zcrypt_rng_device_count == 0) {
- hwrng_unregister(&zcrypt_rng_dev);
- free_page((unsigned long) zcrypt_rng_buffer);
- }
- mutex_unlock(&zcrypt_rng_mutex);
- }
- int __init zcrypt_debug_init(void)
- {
- zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
- DBF_MAX_SPRINTF_ARGS * sizeof(long));
- debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
- debug_set_level(zcrypt_dbf_info, DBF_ERR);
- return 0;
- }
- void zcrypt_debug_exit(void)
- {
- debug_unregister(zcrypt_dbf_info);
- }
- #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
- static int __init zcdn_init(void)
- {
- int rc;
- /* create a new class 'zcrypt' */
- zcrypt_class = class_create(THIS_MODULE, ZCRYPT_NAME);
- if (IS_ERR(zcrypt_class)) {
- rc = PTR_ERR(zcrypt_class);
- goto out_class_create_failed;
- }
- zcrypt_class->dev_release = zcdn_device_release;
- /* alloc device minor range */
- rc = alloc_chrdev_region(&zcrypt_devt,
- 0, ZCRYPT_MAX_MINOR_NODES,
- ZCRYPT_NAME);
- if (rc)
- goto out_alloc_chrdev_failed;
- cdev_init(&zcrypt_cdev, &zcrypt_fops);
- zcrypt_cdev.owner = THIS_MODULE;
- rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
- if (rc)
- goto out_cdev_add_failed;
- /* need some class specific sysfs attributes */
- rc = class_create_file(zcrypt_class, &class_attr_zcdn_create);
- if (rc)
- goto out_class_create_file_1_failed;
- rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy);
- if (rc)
- goto out_class_create_file_2_failed;
- return 0;
- out_class_create_file_2_failed:
- class_remove_file(zcrypt_class, &class_attr_zcdn_create);
- out_class_create_file_1_failed:
- cdev_del(&zcrypt_cdev);
- out_cdev_add_failed:
- unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
- out_alloc_chrdev_failed:
- class_destroy(zcrypt_class);
- out_class_create_failed:
- return rc;
- }
- static void zcdn_exit(void)
- {
- class_remove_file(zcrypt_class, &class_attr_zcdn_create);
- class_remove_file(zcrypt_class, &class_attr_zcdn_destroy);
- zcdn_destroy_all();
- cdev_del(&zcrypt_cdev);
- unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
- class_destroy(zcrypt_class);
- }
- #endif
- /**
- * zcrypt_api_init(): Module initialization.
- *
- * The module initialization code.
- */
- int __init zcrypt_api_init(void)
- {
- int rc;
- rc = zcrypt_debug_init();
- if (rc)
- goto out;
- #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
- rc = zcdn_init();
- if (rc)
- goto out;
- #endif
- /* Register the request sprayer. */
- rc = misc_register(&zcrypt_misc_device);
- if (rc < 0)
- goto out_misc_register_failed;
- zcrypt_msgtype6_init();
- zcrypt_msgtype50_init();
- return 0;
- out_misc_register_failed:
- #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
- zcdn_exit();
- #endif
- zcrypt_debug_exit();
- out:
- return rc;
- }
- /**
- * zcrypt_api_exit(): Module termination.
- *
- * The module termination code.
- */
- void __exit zcrypt_api_exit(void)
- {
- #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
- zcdn_exit();
- #endif
- misc_deregister(&zcrypt_misc_device);
- zcrypt_msgtype6_exit();
- zcrypt_msgtype50_exit();
- zcrypt_ccamisc_exit();
- zcrypt_ep11misc_exit();
- zcrypt_debug_exit();
- }
- module_init(zcrypt_api_init);
- module_exit(zcrypt_api_exit);
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