^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * James Leu (jleu@mindspring.net).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2001 by various other people who didn't put their name here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/memblock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/etherdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/ethtool.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/inetdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/rtnetlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <irq_kern.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <irq_user.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include "mconsole_kern.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <net_kern.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <net_user.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define DRIVER_NAME "uml-netdev"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static DEFINE_SPINLOCK(opened_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static LIST_HEAD(opened);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * The drop_skb is used when we can't allocate an skb. The
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * packet is read into drop_skb in order to get the data off the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * connection to the host.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * It is reallocated whenever a maximum packet size is seen which is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * larger than any seen before. update_drop_skb is called from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * eth_configure when a new interface is added.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static DEFINE_SPINLOCK(drop_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) static struct sk_buff *drop_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static int drop_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static int update_drop_skb(int max)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct sk_buff *new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) spin_lock_irqsave(&drop_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) if (max <= drop_max)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) new = dev_alloc_skb(max);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) if (new == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) skb_put(new, max);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) kfree_skb(drop_skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) drop_skb = new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) drop_max = max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) spin_unlock_irqrestore(&drop_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) static int uml_net_rx(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) struct uml_net_private *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) int pkt_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) /* If we can't allocate memory, try again next round. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) skb = dev_alloc_skb(lp->max_packet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) if (skb == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) drop_skb->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) /* Read a packet into drop_skb and don't do anything with it. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) (*lp->read)(lp->fd, drop_skb, lp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) dev->stats.rx_dropped++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) skb->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) skb_put(skb, lp->max_packet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) skb_reset_mac_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) pkt_len = (*lp->read)(lp->fd, skb, lp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (pkt_len > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) skb_trim(skb, pkt_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) skb->protocol = (*lp->protocol)(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) dev->stats.rx_bytes += skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) dev->stats.rx_packets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) netif_rx(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return pkt_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return pkt_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static void uml_dev_close(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) struct uml_net_private *lp =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) container_of(work, struct uml_net_private, work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) dev_close(lp->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static irqreturn_t uml_net_interrupt(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) struct net_device *dev = dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) struct uml_net_private *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (!netif_running(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) return IRQ_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) spin_lock(&lp->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) while ((err = uml_net_rx(dev)) > 0) ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) "Device '%s' read returned %d, shutting it down\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) dev->name, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) /* dev_close can't be called in interrupt context, and takes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) * again lp->lock.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) * And dev_close() can be safely called multiple times on the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) * same device, since it tests for (dev->flags & IFF_UP). So
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) * there's no harm in delaying the device shutdown.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) * Furthermore, the workqueue will not re-enqueue an already
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) * enqueued work item. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) schedule_work(&lp->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) spin_unlock(&lp->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) static int uml_net_open(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) struct uml_net_private *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) if (lp->fd >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) err = -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) lp->fd = (*lp->open)(&lp->user);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if (lp->fd < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) err = lp->fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) err = um_request_irq(dev->irq, lp->fd, IRQ_READ, uml_net_interrupt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) IRQF_SHARED, dev->name, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) if (err != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) printk(KERN_ERR "uml_net_open: failed to get irq(%d)\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) err = -ENETUNREACH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) goto out_close;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) netif_start_queue(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) /* clear buffer - it can happen that the host side of the interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) * is full when we get here. In this case, new data is never queued,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) * SIGIOs never arrive, and the net never works.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) while ((err = uml_net_rx(dev)) > 0) ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) spin_lock(&opened_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) list_add(&lp->list, &opened);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) spin_unlock(&opened_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) out_close:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) if (lp->close != NULL) (*lp->close)(lp->fd, &lp->user);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) lp->fd = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) static int uml_net_close(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) struct uml_net_private *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) netif_stop_queue(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) um_free_irq(dev->irq, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) if (lp->close != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) (*lp->close)(lp->fd, &lp->user);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) lp->fd = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) spin_lock(&opened_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) list_del(&lp->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) spin_unlock(&opened_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) static int uml_net_start_xmit(struct sk_buff *skb, struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) struct uml_net_private *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) netif_stop_queue(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) spin_lock_irqsave(&lp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) len = (*lp->write)(lp->fd, skb, lp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) skb_tx_timestamp(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) if (len == skb->len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) dev->stats.tx_packets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) dev->stats.tx_bytes += skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) netif_trans_update(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) netif_start_queue(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) /* this is normally done in the interrupt when tx finishes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) netif_wake_queue(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) else if (len == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) netif_start_queue(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) dev->stats.tx_dropped++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) netif_start_queue(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) printk(KERN_ERR "uml_net_start_xmit: failed(%d)\n", len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) spin_unlock_irqrestore(&lp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) dev_consume_skb_any(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) return NETDEV_TX_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) static void uml_net_set_multicast_list(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) static void uml_net_tx_timeout(struct net_device *dev, unsigned int txqueue)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) netif_trans_update(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) netif_wake_queue(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) #ifdef CONFIG_NET_POLL_CONTROLLER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) static void uml_net_poll_controller(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) disable_irq(dev->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) uml_net_interrupt(dev->irq, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) enable_irq(dev->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) static void uml_net_get_drvinfo(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) struct ethtool_drvinfo *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) strlcpy(info->driver, DRIVER_NAME, sizeof(info->driver));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) static const struct ethtool_ops uml_net_ethtool_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) .get_drvinfo = uml_net_get_drvinfo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) .get_link = ethtool_op_get_link,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) .get_ts_info = ethtool_op_get_ts_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) void uml_net_setup_etheraddr(struct net_device *dev, char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) unsigned char *addr = dev->dev_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) char *end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) if (str == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) goto random;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) for (i = 0; i < 6; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) addr[i] = simple_strtoul(str, &end, 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) if ((end == str) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) ((*end != ':') && (*end != ',') && (*end != '\0'))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) "setup_etheraddr: failed to parse '%s' "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) "as an ethernet address\n", str);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) goto random;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) str = end + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) if (is_multicast_ether_addr(addr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) "Attempt to assign a multicast ethernet address to a "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) "device disallowed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) goto random;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) if (!is_valid_ether_addr(addr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) "Attempt to assign an invalid ethernet address to a "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) "device disallowed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) goto random;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) if (!is_local_ether_addr(addr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) printk(KERN_WARNING
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) "Warning: Assigning a globally valid ethernet "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) "address to a device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) printk(KERN_WARNING "You should set the 2nd rightmost bit in "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) "the first byte of the MAC,\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) printk(KERN_WARNING "i.e. %02x:%02x:%02x:%02x:%02x:%02x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) addr[0] | 0x02, addr[1], addr[2], addr[3], addr[4],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) addr[5]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) random:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) printk(KERN_INFO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) "Choosing a random ethernet address for device %s\n", dev->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) eth_hw_addr_random(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) static DEFINE_SPINLOCK(devices_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) static LIST_HEAD(devices);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) static struct platform_driver uml_net_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) .name = DRIVER_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) static void net_device_release(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) struct uml_net *device = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) struct net_device *netdev = device->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) struct uml_net_private *lp = netdev_priv(netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) if (lp->remove != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) (*lp->remove)(&lp->user);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) list_del(&device->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) kfree(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) free_netdev(netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) static const struct net_device_ops uml_netdev_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) .ndo_open = uml_net_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) .ndo_stop = uml_net_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) .ndo_start_xmit = uml_net_start_xmit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) .ndo_set_rx_mode = uml_net_set_multicast_list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) .ndo_tx_timeout = uml_net_tx_timeout,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) .ndo_set_mac_address = eth_mac_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) .ndo_validate_addr = eth_validate_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) #ifdef CONFIG_NET_POLL_CONTROLLER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) .ndo_poll_controller = uml_net_poll_controller,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) * Ensures that platform_driver_register is called only once by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) * eth_configure. Will be set in an initcall.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) static int driver_registered;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) static void eth_configure(int n, void *init, char *mac,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) struct transport *transport, gfp_t gfp_mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) struct uml_net *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) struct uml_net_private *lp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) int err, size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) size = transport->private_size + sizeof(struct uml_net_private);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) device = kzalloc(sizeof(*device), gfp_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) if (device == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) printk(KERN_ERR "eth_configure failed to allocate struct "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) "uml_net\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) dev = alloc_etherdev(size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) if (dev == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) printk(KERN_ERR "eth_configure: failed to allocate struct "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) "net_device for eth%d\n", n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) goto out_free_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) INIT_LIST_HEAD(&device->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) device->index = n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) /* If this name ends up conflicting with an existing registered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) * netdevice, that is OK, register_netdev{,ice}() will notice this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) * and fail.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) snprintf(dev->name, sizeof(dev->name), "eth%d", n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) uml_net_setup_etheraddr(dev, mac);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) printk(KERN_INFO "Netdevice %d (%pM) : ", n, dev->dev_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) /* This points to the transport private data. It's still clear, but we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) * must memset it to 0 *now*. Let's help the drivers. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) memset(lp, 0, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) INIT_WORK(&lp->work, uml_dev_close);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) /* sysfs register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) if (!driver_registered) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) platform_driver_register(¨_net_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) driver_registered = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) device->pdev.id = n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) device->pdev.name = DRIVER_NAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) device->pdev.dev.release = net_device_release;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) dev_set_drvdata(&device->pdev.dev, device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) if (platform_device_register(&device->pdev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) goto out_free_netdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) SET_NETDEV_DEV(dev,&device->pdev.dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) device->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) * These just fill in a data structure, so there's no failure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) * to be worried about.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) (*transport->kern->init)(dev, init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) *lp = ((struct uml_net_private)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) { .list = LIST_HEAD_INIT(lp->list),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) .dev = dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) .fd = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) .mac = { 0xfe, 0xfd, 0x0, 0x0, 0x0, 0x0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) .max_packet = transport->user->max_packet,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) .protocol = transport->kern->protocol,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) .open = transport->user->open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) .close = transport->user->close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) .remove = transport->user->remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) .read = transport->kern->read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) .write = transport->kern->write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) .add_address = transport->user->add_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) .delete_address = transport->user->delete_address });
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) spin_lock_init(&lp->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) memcpy(lp->mac, dev->dev_addr, sizeof(lp->mac));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) if ((transport->user->init != NULL) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) ((*transport->user->init)(&lp->user, dev) != 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) goto out_unregister;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) dev->mtu = transport->user->mtu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) dev->netdev_ops = ¨_netdev_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) dev->ethtool_ops = ¨_net_ethtool_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) dev->watchdog_timeo = (HZ >> 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) dev->irq = UM_ETH_IRQ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) err = update_drop_skb(lp->max_packet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) goto out_undo_user_init;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) rtnl_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) err = register_netdevice(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) rtnl_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) goto out_undo_user_init;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) spin_lock(&devices_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) list_add(&device->list, &devices);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) spin_unlock(&devices_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) out_undo_user_init:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) if (transport->user->remove != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) (*transport->user->remove)(&lp->user);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) out_unregister:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) platform_device_unregister(&device->pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) return; /* platform_device_unregister frees dev and device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) out_free_netdev:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) free_netdev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) out_free_device:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) kfree(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) static struct uml_net *find_device(int n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) struct uml_net *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) struct list_head *ele;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) spin_lock(&devices_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) list_for_each(ele, &devices) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) device = list_entry(ele, struct uml_net, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) if (device->index == n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) device = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) spin_unlock(&devices_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) return device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) static int eth_parse(char *str, int *index_out, char **str_out,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) char **error_out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) char *end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) int n, err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) n = simple_strtoul(str, &end, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) if (end == str) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) *error_out = "Bad device number";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) str = end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) if (*str != '=') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) *error_out = "Expected '=' after device number";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) str++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) if (find_device(n)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) *error_out = "Device already configured";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) *index_out = n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) *str_out = str;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) struct eth_init {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) char *init;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) int index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) static DEFINE_SPINLOCK(transports_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) static LIST_HEAD(transports);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) /* Filled in during early boot */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) static LIST_HEAD(eth_cmd_line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) static int check_transport(struct transport *transport, char *eth, int n,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) void **init_out, char **mac_out, gfp_t gfp_mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) len = strlen(transport->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) if (strncmp(eth, transport->name, len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) eth += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) if (*eth == ',')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) eth++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) else if (*eth != '\0')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) *init_out = kmalloc(transport->setup_size, gfp_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) if (*init_out == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) if (!transport->setup(eth, mac_out, *init_out)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) kfree(*init_out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) *init_out = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) void register_transport(struct transport *new)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) struct list_head *ele, *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) struct eth_init *eth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) void *init;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) char *mac = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) int match;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) spin_lock(&transports_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) BUG_ON(!list_empty(&new->list));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) list_add(&new->list, &transports);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) spin_unlock(&transports_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) list_for_each_safe(ele, next, ð_cmd_line) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) eth = list_entry(ele, struct eth_init, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) match = check_transport(new, eth->init, eth->index, &init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) &mac, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) if (!match)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) else if (init != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) eth_configure(eth->index, init, mac, new, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) kfree(init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) list_del(ð->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) static int eth_setup_common(char *str, int index)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) struct list_head *ele;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) struct transport *transport;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) void *init;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) char *mac = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) int found = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) spin_lock(&transports_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) list_for_each(ele, &transports) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) transport = list_entry(ele, struct transport, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) if (!check_transport(transport, str, index, &init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) &mac, GFP_ATOMIC))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) if (init != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) eth_configure(index, init, mac, transport, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) kfree(init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) found = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) spin_unlock(&transports_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) return found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) static int __init eth_setup(char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) struct eth_init *new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) char *error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) int n, err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) err = eth_parse(str, &n, &str, &error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) printk(KERN_ERR "eth_setup - Couldn't parse '%s' : %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) str, error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) new = memblock_alloc(sizeof(*new), SMP_CACHE_BYTES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) if (!new)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) panic("%s: Failed to allocate %zu bytes\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) sizeof(*new));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) INIT_LIST_HEAD(&new->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) new->index = n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) new->init = str;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) list_add_tail(&new->list, ð_cmd_line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) __setup("eth", eth_setup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) __uml_help(eth_setup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) "eth[0-9]+=<transport>,<options>\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) " Configure a network device.\n\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) static int net_config(char *str, char **error_out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) int n, err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) err = eth_parse(str, &n, &str, error_out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) /* This string is broken up and the pieces used by the underlying
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) * driver. So, it is freed only if eth_setup_common fails.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) str = kstrdup(str, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) if (str == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) *error_out = "net_config failed to strdup string";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) err = !eth_setup_common(str, n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) kfree(str);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) static int net_id(char **str, int *start_out, int *end_out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) char *end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) int n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) n = simple_strtoul(*str, &end, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) if ((*end != '\0') || (end == *str))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) *start_out = n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) *end_out = n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) *str = end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) return n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) static int net_remove(int n, char **error_out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) struct uml_net *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) struct uml_net_private *lp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) device = find_device(n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) if (device == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) dev = device->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) if (lp->fd > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) unregister_netdev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) platform_device_unregister(&device->pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) static struct mc_device net_mc = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) .list = LIST_HEAD_INIT(net_mc.list),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) .name = "eth",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) .config = net_config,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) .get_config = NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) .id = net_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) .remove = net_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) #ifdef CONFIG_INET
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) static int uml_inetaddr_event(struct notifier_block *this, unsigned long event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) void *ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) struct in_ifaddr *ifa = ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) struct net_device *dev = ifa->ifa_dev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) struct uml_net_private *lp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) void (*proc)(unsigned char *, unsigned char *, void *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) unsigned char addr_buf[4], netmask_buf[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) if (dev->netdev_ops->ndo_open != uml_net_open)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) proc = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) switch (event) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) case NETDEV_UP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) proc = lp->add_address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) case NETDEV_DOWN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) proc = lp->delete_address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) if (proc != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) memcpy(addr_buf, &ifa->ifa_address, sizeof(addr_buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) memcpy(netmask_buf, &ifa->ifa_mask, sizeof(netmask_buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) (*proc)(addr_buf, netmask_buf, &lp->user);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) /* uml_net_init shouldn't be called twice on two CPUs at the same time */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) static struct notifier_block uml_inetaddr_notifier = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) .notifier_call = uml_inetaddr_event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) static void inet_register(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) struct list_head *ele;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) struct uml_net_private *lp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) struct in_device *ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) struct in_ifaddr *in;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) register_inetaddr_notifier(¨_inetaddr_notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) /* Devices may have been opened already, so the uml_inetaddr_notifier
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) * didn't get a chance to run for them. This fakes it so that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) * addresses which have already been set up get handled properly.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) spin_lock(&opened_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) list_for_each(ele, &opened) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) lp = list_entry(ele, struct uml_net_private, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) ip = lp->dev->ip_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) if (ip == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) in = ip->ifa_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) while (in != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) uml_inetaddr_event(NULL, NETDEV_UP, in);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) in = in->ifa_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) spin_unlock(&opened_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) static inline void inet_register(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) static int uml_net_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) mconsole_register_dev(&net_mc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) inet_register();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) __initcall(uml_net_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) static void close_devices(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) struct list_head *ele;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) struct uml_net_private *lp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) spin_lock(&opened_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) list_for_each(ele, &opened) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) lp = list_entry(ele, struct uml_net_private, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) um_free_irq(lp->dev->irq, lp->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) if ((lp->close != NULL) && (lp->fd >= 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) (*lp->close)(lp->fd, &lp->user);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) if (lp->remove != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) (*lp->remove)(&lp->user);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) spin_unlock(&opened_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) __uml_exitcall(close_devices);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) void iter_addresses(void *d, void (*cb)(unsigned char *, unsigned char *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) void *),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) void *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) struct net_device *dev = d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) struct in_device *ip = dev->ip_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) struct in_ifaddr *in;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) unsigned char address[4], netmask[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) if (ip == NULL) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) in = ip->ifa_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) while (in != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) memcpy(address, &in->ifa_address, sizeof(address));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) memcpy(netmask, &in->ifa_mask, sizeof(netmask));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) (*cb)(address, netmask, arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) in = in->ifa_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) int dev_netmask(void *d, void *m)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) struct net_device *dev = d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) struct in_device *ip = dev->ip_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) struct in_ifaddr *in;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) __be32 *mask_out = m;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) if (ip == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) in = ip->ifa_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) if (in == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) *mask_out = in->ifa_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) void *get_output_buffer(int *len_out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) void *ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) ret = (void *) __get_free_pages(GFP_KERNEL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) if (ret) *len_out = PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) else *len_out = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) void free_output_buffer(void *buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) free_pages((unsigned long) buffer, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) int tap_setup_common(char *str, char *type, char **dev_name, char **mac_out,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) char **gate_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) char *remain;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) remain = split_if_spec(str, dev_name, mac_out, gate_addr, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) if (remain != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) printk(KERN_ERR "tap_setup_common - Extra garbage on "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) "specification : '%s'\n", remain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) unsigned short eth_protocol(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) return eth_type_trans(skb, skb->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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