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/*
* Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
* 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 Hyra 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/errno.h>
#include <sys/syscall.h>
#include <sys/disk.h>
/*
* Disk I/O multiplexer system call which routes
* various disk operations via a single call.
*
* @id: The ID of the disk to be operated on
* @op: Operation code
* @param: Operation parameters
*
* Returns the number of bytes operated on upon success,
* otherwise a less than zero value is returned.
*/
ssize_t
__disk_io(diskid_t id, diskop_t op, const struct disk_param *param)
{
if (param == NULL) {
return -EINVAL;
}
return syscall(
SYS_disk,
id,
op,
(uintptr_t)param
);
}
/*
* Performs a write operation on a specific disk
*
* @id: ID of disk to operate on
* @blk: Block offset to operate on
* @buf: Data to write
* @len: Number of bytes to write
*
* Returns the number of bytes written upon success, otherwise
* a less than zero value is returned on error.
*/
ssize_t
disk_write(diskid_t id, blkoff_t blk, const void *buf, size_t len)
{
struct disk_param param;
if (buf == NULL || len == 0) {
return -EINVAL;
}
disk_param_init(buf, blk, len, ¶m);
return __disk_io(id, DISK_IO_WRITE, ¶m);
}
/*
* Performs a read operation on a specific disk
*
* @id: ID of disk to operate on
* @blk: Block offset to operate on
* @buf: Buffer to read data into
* @len: Number of bytes to read
*
* Returns the number of bytes read upon success, otherwise
* a less than zero value is returned on error.
*/
ssize_t
disk_read(diskid_t id, blkoff_t blk, void *buf, size_t len)
{
struct disk_param param;
if (buf == NULL || len == 0) {
return -EINVAL;
}
disk_param_init(buf, blk, len, ¶m);
return __disk_io(id, DISK_IO_READ, ¶m);
}
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