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/*
* Copyright (c) 2025 Ian Marco Moffett and L5 engineers
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* 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.
* 3. Neither the name of the project nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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.
*/
#include <sys/types.h>
#include <sys/errno.h>
#include <sys/queue.h>
#include <sys/atomic.h>
#include <os/kalloc.h>
#include <os/iotap.h>
#include <os/nsvar.h>
#include <os/ns.h>
#include <stdbool.h>
#include <string.h>
#include <sys/syslog.h>
static size_t next_id = 0;
iotap_t
iotap_register(const struct iotap_desc *iotap)
{
struct iotap_desc *tap;
struct ns_obj *obj;
int error;
if (iotap->name == NULL) {
return -EINVAL;
}
tap = kalloc(sizeof(*tap));
if (tap == NULL) {
return -EINVAL;
}
obj = kalloc(sizeof(*obj));
if (obj == NULL) {
kfree(tap);
return -EINVAL;
}
memcpy(tap, iotap, sizeof(*tap));
tap->id = atomic_inc_64(&next_id);
/* Copy the name */
tap->name = strdup(iotap->name);
/* Initialize and store */
ns_obj_init(obj);
obj->data = tap;
error = ns_obj_enter(NS_IOTAP, obj, iotap->name);
if (error < 0) {
kfree(tap);
kfree(obj);
return error;
}
return tap->id;
}
int
iotap_lookup(const char *name, struct iotap_desc *dp_res)
{
struct iotap_desc *tap;
int error;
if (name == NULL || dp_res == NULL) {
return -EINVAL;
}
/* Look up the object in the namespace */
error = ns_obj_lookup(NS_IOTAP, name, (void *)&tap);
if (error < 0) {
return error;
}
/* Copy it out to the result store */
*dp_res = *tap;
return 0;
}
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