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/*
* This code lifted from:
* Simple `echo' pseudo-device KLD
* Murray Stokely
* Converted to 5.X by Søren (Xride) Straarup
*/
/*
* /bin/echo "server,port=9999,addr=192.168.69.142,validate" > /dev/krping
* /bin/echo "client,port=9999,addr=192.168.69.142,validate" > /dev/krping
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/module.h>
#include <sys/systm.h> /* uprintf */
#include <sys/errno.h>
#include <sys/param.h> /* defines used in kernel.h */
#include <sys/kernel.h> /* types used in module initialization */
#include <sys/conf.h> /* cdevsw struct */
#include <sys/uio.h> /* uio struct */
#include <sys/malloc.h>
#include "krping.h"
#define BUFFERSIZE 512
/* Function prototypes */
static d_open_t krping_open;
static d_close_t krping_close;
static d_read_t krping_read;
static d_write_t krping_write;
/* Character device entry points */
static struct cdevsw krping_cdevsw = {
.d_version = D_VERSION,
.d_open = krping_open,
.d_close = krping_close,
.d_read = krping_read,
.d_write = krping_write,
.d_name = "krping",
};
typedef struct s_krping {
char msg[BUFFERSIZE];
int len;
} krping_t;
/* vars */
static struct cdev *krping_dev;
static int
krping_loader(struct module *m, int what, void *arg)
{
int err = 0;
switch (what) {
case MOD_LOAD: /* kldload */
krping_init();
krping_dev = make_dev(&krping_cdevsw, 0, UID_ROOT, GID_WHEEL,
0600, "krping");
printf("Krping device loaded.\n");
break;
case MOD_UNLOAD:
destroy_dev(krping_dev);
printf("Krping device unloaded.\n");
break;
default:
err = EOPNOTSUPP;
break;
}
return err;
}
static int
krping_open(struct cdev *dev, int oflags, int devtype, struct thread *p)
{
int err = 0;
return err;
}
static int
krping_close(struct cdev *dev, int fflag, int devtype, struct thread *p)
{
return 0;
}
static int
krping_read(struct cdev *dev, struct uio *uio, int ioflag)
{
struct krping_cb *cb, *cb2;
int num=1;
struct krping_cb_list copy_cbs;
uprintf("krping: %4s %10s %10s %10s %10s %10s %10s %10s %10s %10s\n",
"num", "device", "snd bytes", "snd msgs", "rcv bytes",
"rcv msgs", "wr bytes", "wr msgs", "rd bytes", "rd msgs");
TAILQ_INIT(©_cbs);
mtx_lock(&krping_mutex);
TAILQ_FOREACH(cb, &krping_cbs, list) {
cb2 = malloc(sizeof(*cb), M_DEVBUF, M_NOWAIT|M_ZERO);
if (!cb2)
break;
bcopy(cb, cb2, sizeof(*cb));
TAILQ_INSERT_TAIL(©_cbs, cb2, list);
}
mtx_unlock(&krping_mutex);
while (!TAILQ_EMPTY(©_cbs)) {
cb = TAILQ_FIRST(©_cbs);
TAILQ_REMOVE(©_cbs, cb, list);
if (cb->pd) {
uprintf("krping: %4d %10s %10u %10u %10u %10u %10u %10u %10u %10u\n",
num++, cb->pd->device->name, cb->stats.send_bytes,
cb->stats.send_msgs, cb->stats.recv_bytes,
cb->stats.recv_msgs, cb->stats.write_bytes,
cb->stats.write_msgs,
cb->stats.read_bytes,
cb->stats.read_msgs);
} else {
uprintf("krping: %d listen\n", num++);
}
free(cb, M_DEVBUF);
}
return 0;
}
static int
krping_write(struct cdev *dev, struct uio *uio, int ioflag)
{
int err = 0;
int amt;
int remain = BUFFERSIZE;
char *cp;
krping_t *krpingmsg;
krpingmsg = malloc(sizeof *krpingmsg, M_DEVBUF, M_WAITOK|M_ZERO);
if (!krpingmsg) {
uprintf("Could not malloc mem!\n");
return ENOMEM;
}
cp = krpingmsg->msg;
while (uio->uio_resid) {
amt = MIN(uio->uio_resid, remain);
if (amt == 0)
break;
/* Copy the string in from user memory to kernel memory */
err = uiomove(cp, amt, uio);
if (err) {
uprintf("Write failed: bad address!\n");
return err;
}
cp += amt;
remain -= amt;
}
if (uio->uio_resid != 0) {
uprintf("Message too big. max size is %d!\n", BUFFERSIZE);
return EMSGSIZE;
}
/* null terminate and remove the \n */
cp--;
*cp = 0;
krpingmsg->len = (unsigned long)(cp - krpingmsg->msg);
uprintf("krping: write string = |%s|\n", krpingmsg->msg);
err = krping_doit(krpingmsg->msg);
free(krpingmsg, M_DEVBUF);
return(err);
}
MODULE_DEPEND(krping, rdma_core, 1, 1, 1);
MODULE_DEPEND(krping, rdma_cma, 1, 1, 1);
DEV_MODULE(krping,krping_loader,NULL);
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