#include <linux/hrtimer.h>
#include <linux/list.h>
#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
#include <linux/uio.h>
#include <linux/net.h>
#include <linux/netdevice.h>
MODULE_DESCRIPTION("PF_CAN broadcast manager protocol");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Oliver Hartkopp <oliver.hartkopp@volkswagen.de>");
+MODULE_ALIAS("can-proto-2");
/* easy access to can_frame payload */
static inline u64 GET_U64(const struct can_frame *cp)
/*
* procfs functions
*/
-static char *bcm_proc_getifname(int ifindex)
+static char *bcm_proc_getifname(char *result, int ifindex)
{
struct net_device *dev;
if (!ifindex)
return "any";
- /* no usage counting */
- dev = __dev_get_by_index(&init_net, ifindex);
+ rcu_read_lock();
+ dev = dev_get_by_index_rcu(&init_net, ifindex);
if (dev)
- return dev->name;
+ strcpy(result, dev->name);
+ else
+ strcpy(result, "???");
+ rcu_read_unlock();
- return "???";
+ return result;
}
-static int bcm_read_proc(char *page, char **start, off_t off,
- int count, int *eof, void *data)
+static int bcm_proc_show(struct seq_file *m, void *v)
{
- int len = 0;
- struct sock *sk = (struct sock *)data;
+ char ifname[IFNAMSIZ];
+ struct sock *sk = (struct sock *)m->private;
struct bcm_sock *bo = bcm_sk(sk);
struct bcm_op *op;
- len += snprintf(page + len, PAGE_SIZE - len, ">>> socket %p",
- sk->sk_socket);
- len += snprintf(page + len, PAGE_SIZE - len, " / sk %p", sk);
- len += snprintf(page + len, PAGE_SIZE - len, " / bo %p", bo);
- len += snprintf(page + len, PAGE_SIZE - len, " / dropped %lu",
- bo->dropped_usr_msgs);
- len += snprintf(page + len, PAGE_SIZE - len, " / bound %s",
- bcm_proc_getifname(bo->ifindex));
- len += snprintf(page + len, PAGE_SIZE - len, " <<<\n");
+ seq_printf(m, ">>> socket %p", sk->sk_socket);
+ seq_printf(m, " / sk %p", sk);
+ seq_printf(m, " / bo %p", bo);
+ seq_printf(m, " / dropped %lu", bo->dropped_usr_msgs);
+ seq_printf(m, " / bound %s", bcm_proc_getifname(ifname, bo->ifindex));
+ seq_printf(m, " <<<\n");
list_for_each_entry(op, &bo->rx_ops, list) {
if (!op->frames_abs)
continue;
- len += snprintf(page + len, PAGE_SIZE - len,
- "rx_op: %03X %-5s ",
- op->can_id, bcm_proc_getifname(op->ifindex));
- len += snprintf(page + len, PAGE_SIZE - len, "[%d]%c ",
- op->nframes,
+ seq_printf(m, "rx_op: %03X %-5s ",
+ op->can_id, bcm_proc_getifname(ifname, op->ifindex));
+ seq_printf(m, "[%d]%c ", op->nframes,
(op->flags & RX_CHECK_DLC)?'d':' ');
if (op->kt_ival1.tv64)
- len += snprintf(page + len, PAGE_SIZE - len,
- "timeo=%lld ",
+ seq_printf(m, "timeo=%lld ",
(long long)
ktime_to_us(op->kt_ival1));
if (op->kt_ival2.tv64)
- len += snprintf(page + len, PAGE_SIZE - len,
- "thr=%lld ",
+ seq_printf(m, "thr=%lld ",
(long long)
ktime_to_us(op->kt_ival2));
- len += snprintf(page + len, PAGE_SIZE - len,
- "# recv %ld (%ld) => reduction: ",
+ seq_printf(m, "# recv %ld (%ld) => reduction: ",
op->frames_filtered, op->frames_abs);
reduction = 100 - (op->frames_filtered * 100) / op->frames_abs;
- len += snprintf(page + len, PAGE_SIZE - len, "%s%ld%%\n",
+ seq_printf(m, "%s%ld%%\n",
(reduction == 100)?"near ":"", reduction);
-
- if (len > PAGE_SIZE - 200) {
- /* mark output cut off */
- len += snprintf(page + len, PAGE_SIZE - len, "(..)\n");
- break;
- }
}
list_for_each_entry(op, &bo->tx_ops, list) {
- len += snprintf(page + len, PAGE_SIZE - len,
- "tx_op: %03X %s [%d] ",
- op->can_id, bcm_proc_getifname(op->ifindex),
+ seq_printf(m, "tx_op: %03X %s [%d] ",
+ op->can_id,
+ bcm_proc_getifname(ifname, op->ifindex),
op->nframes);
if (op->kt_ival1.tv64)
- len += snprintf(page + len, PAGE_SIZE - len, "t1=%lld ",
+ seq_printf(m, "t1=%lld ",
(long long) ktime_to_us(op->kt_ival1));
if (op->kt_ival2.tv64)
- len += snprintf(page + len, PAGE_SIZE - len, "t2=%lld ",
+ seq_printf(m, "t2=%lld ",
(long long) ktime_to_us(op->kt_ival2));
- len += snprintf(page + len, PAGE_SIZE - len, "# sent %ld\n",
- op->frames_abs);
-
- if (len > PAGE_SIZE - 100) {
- /* mark output cut off */
- len += snprintf(page + len, PAGE_SIZE - len, "(..)\n");
- break;
- }
+ seq_printf(m, "# sent %ld\n", op->frames_abs);
}
+ seq_putc(m, '\n');
+ return 0;
+}
- len += snprintf(page + len, PAGE_SIZE - len, "\n");
-
- *eof = 1;
- return len;
+static int bcm_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, bcm_proc_show, PDE(inode)->data);
}
+static const struct file_operations bcm_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = bcm_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
/*
* bcm_can_tx - send the (next) CAN frame to the appropriate CAN interface
* of the given bcm tx op
bo->ifindex = 0;
}
+ sock_orphan(sk);
+ sock->sk = NULL;
+
release_sock(sk);
sock_put(sk);
if (proc_dir) {
/* unique socket address as filename */
sprintf(bo->procname, "%p", sock);
- bo->bcm_proc_read = create_proc_read_entry(bo->procname, 0644,
- proc_dir,
- bcm_read_proc, sk);
+ bo->bcm_proc_read = proc_create_data(bo->procname, 0644,
+ proc_dir,
+ &bcm_proc_fops, sk);
}
return 0;
return err;
}
- sock_recv_timestamp(msg, sk, skb);
+ sock_recv_ts_and_drops(msg, sk, skb);
if (msg->msg_name) {
msg->msg_namelen = sizeof(struct sockaddr_can);
static struct can_proto bcm_can_proto __read_mostly = {
.type = SOCK_DGRAM,
.protocol = CAN_BCM,
- .capability = -1,
.ops = &bcm_ops,
.prot = &bcm_proto,
};