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/*
* Copyright 2017 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* Authors: Jérôme Glisse <jglisse@redhat.com>
*/
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <strings.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <stdio.h>
#include <fcntl.h>
#include "compote.h"
#include "compote-uapi.h"
int compote_context_new(compote_context_t **ctxp)
{
compote_context_t *ctx;
int fd;
fd = open("/dev/compote", O_RDWR, 0);
if (fd < 0) {
fprintf(stderr, "could not open compote device\n");
return -ENODEV;
}
ctx = calloc(1, sizeof(*ctx));
if (ctx == NULL) {
close(fd);
return -ENOMEM;
}
ctx->fd = fd;
*ctxp = ctx;
return 0;
}
void compote_context_del(compote_context_t **ctxp)
{
compote_context_t *ctx = *ctxp;
*ctxp = NULL;
close(ctx->fd);
free(ctx);
}
int compote_context_ioctl(compote_context_t *ctx, int command, void *arg)
{
do {
int ret;
ret = ioctl(ctx->fd, command, arg);
if (ret && errno != EINTR) {
printf("ret %d errno %d\n", ret, errno);
return ret;
}
} while (errno == EINTR);
return 0;
}
int compote_mo_new(compote_context_t *ctx, compote_mo_t **mop, uint64_t nbytes)
{
struct compote_ioctl_mem_alloc arg;
compote_mo_t *mo;
int ret;
*mop = NULL;
mo = calloc(1, sizeof(*mo));
if (mo == NULL) {
return -ENOMEM;
}
arg.nbytes = nbytes;
ret = compote_context_ioctl(ctx, COMPOTE_IOCTL_MEM_ALLOC, &arg);
if (ret) {
free(mo);
return ret;
}
mo->foffset = arg.foffset;
mo->nbytes = nbytes;
*mop = mo;
return 0;
}
void compote_mo_del(compote_context_t *ctx, compote_mo_t **mop)
{
struct compote_ioctl_mem_free arg;
compote_mo_t *mo = *mop;
*mop = NULL;
if (mo == NULL) {
return;
}
arg.foffset = mo->foffset;
compote_context_ioctl(ctx, COMPOTE_IOCTL_MEM_FREE, &arg);
free(mo);
}
int main(int argc, char *argv[])
{
compote_context_t *ctx;
compote_mo_t *mo;
int ret;
ret = compote_context_new(&ctx);
if (ret) {
return ret;
}
ret = compote_mo_new(ctx, &mo, 64 << 10);
if (ret) {
return ret;
}
printf("La compote c'est bon !\n");
compote_mo_del(ctx, &mo);
compote_context_del(&ctx);
return 0;
}
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