cregit-Linux how code gets into the kernel

Release 4.11 net/atm/lec.c

Directory: net/atm
/*
 * lec.c: Lan Emulation driver
 *
 * Marko Kiiskila <mkiiskila@yahoo.com>
 */


#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__

#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/bitops.h>
#include <linux/capability.h>

/* We are ethernet device */
#include <linux/if_ether.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <net/sock.h>
#include <linux/skbuff.h>
#include <linux/ip.h>
#include <asm/byteorder.h>
#include <linux/uaccess.h>
#include <net/arp.h>
#include <net/dst.h>
#include <linux/proc_fs.h>
#include <linux/spinlock.h>
#include <linux/seq_file.h>

/* And atm device */
#include <linux/atmdev.h>
#include <linux/atmlec.h>

/* Proxy LEC knows about bridging */
#if IS_ENABLED(CONFIG_BRIDGE)
#include "../bridge/br_private.h"


static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 };
#endif

/* Modular too */
#include <linux/module.h>
#include <linux/init.h>

#include "lec.h"
#include "lec_arpc.h"
#include "resources.h"


#define DUMP_PACKETS 0		
/*
                                 * 0 = None,
                                 * 1 = 30 first bytes
                                 * 2 = Whole packet
                                 */


#define LEC_UNRES_QUE_LEN 8	
/*
                                 * number of tx packets to queue for a
                                 * single destination while waiting for SVC
                                 */

static int lec_open(struct net_device *dev);
static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
				  struct net_device *dev);
static int lec_close(struct net_device *dev);
static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
					  const unsigned char *mac_addr);
static int lec_arp_remove(struct lec_priv *priv,
			  struct lec_arp_table *to_remove);
/* LANE2 functions */
static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address,
				const u8 *tlvs, u32 sizeoftlvs);
static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
			 u8 **tlvs, u32 *sizeoftlvs);
static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
			       const u8 *tlvs, u32 sizeoftlvs);

static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
			   unsigned long permanent);
static void lec_arp_check_empties(struct lec_priv *priv,
				  struct atm_vcc *vcc, struct sk_buff *skb);
static void lec_arp_destroy(struct lec_priv *priv);
static void lec_arp_init(struct lec_priv *priv);
static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
				       const unsigned char *mac_to_find,
				       int is_rdesc,
				       struct lec_arp_table **ret_entry);
static void lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
			   const unsigned char *atm_addr,
			   unsigned long remoteflag,
			   unsigned int targetless_le_arp);
static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
static void lec_set_flush_tran_id(struct lec_priv *priv,
				  const unsigned char *atm_addr,
				  unsigned long tran_id);
static void lec_vcc_added(struct lec_priv *priv,
			  const struct atmlec_ioc *ioc_data,
			  struct atm_vcc *vcc,
			  void (*old_push)(struct atm_vcc *vcc,
					   struct sk_buff *skb));
static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);

/* must be done under lec_arp_lock */

static inline void lec_arp_hold(struct lec_arp_table *entry) { atomic_inc(&entry->usage); }

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Chas Williams20100.00%1100.00%
Total20100.00%1100.00%


static inline void lec_arp_put(struct lec_arp_table *entry) { if (atomic_dec_and_test(&entry->usage)) kfree(entry); }

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Chas Williams27100.00%1100.00%
Total27100.00%1100.00%

static struct lane2_ops lane2_ops = { .resolve = lane2_resolve, /* spec 3.1.3 */ .associate_req = lane2_associate_req, /* spec 3.1.4 */ .associate_indicator = NULL /* spec 3.1.5 */ }; static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; /* Device structures */ static struct net_device *dev_lec[MAX_LEC_ITF]; #if IS_ENABLED(CONFIG_BRIDGE)
static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev) { char *buff; struct lec_priv *priv; /* * Check if this is a BPDU. If so, ask zeppelin to send * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit * as the Config BPDU has */ buff = skb->data + skb->dev->hard_header_len; if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) { struct sock *sk; struct sk_buff *skb2; struct atmlec_msg *mesg; skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); if (skb2 == NULL) return; skb2->len = sizeof(struct atmlec_msg); mesg = (struct atmlec_msg *)skb2->data; mesg->type = l_topology_change; buff += 4; mesg->content.normal.flag = *buff & 0x01; /* 0x01 is topology change */ priv = netdev_priv(dev); atm_force_charge(priv->lecd, skb2->truesize); sk = sk_atm(priv->lecd); skb_queue_tail(&sk->sk_receive_queue, skb2); sk->sk_data_ready(sk); } }

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Linus Torvalds (pre-git)16086.96%330.00%
Arnaldo Carvalho de Melo147.61%220.00%
Chas Williams73.80%440.00%
Wang Chen31.63%110.00%
Total184100.00%10100.00%

#endif /* IS_ENABLED(CONFIG_BRIDGE) */ /* * Open/initialize the netdevice. This is called (in the current kernel) * sometime after booting when the 'ifconfig' program is run. * * This routine should set everything up anew at each open, even * registers that "should" only need to be set once at boot, so that * there is non-reboot way to recover if something goes wrong. */
static int lec_open(struct net_device *dev) { netif_start_queue(dev); return 0; }

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Linus Torvalds (pre-git)19100.00%2100.00%
Total19100.00%2100.00%


static void lec_send(struct atm_vcc *vcc, struct sk_buff *skb) { struct net_device *dev = skb->dev; ATM_SKB(skb)->vcc = vcc; ATM_SKB(skb)->atm_options = vcc->atm_options; atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); if (vcc->send(vcc, skb) < 0) { dev->stats.tx_dropped++; return; } dev->stats.tx_packets++; dev->stats.tx_bytes += skb->len; }

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Chas Williams8383.00%342.86%
Stephen Hemminger1212.00%114.29%
Arnaldo Carvalho de Melo44.00%228.57%
Linus Torvalds (pre-git)11.00%114.29%
Total100100.00%7100.00%


static void lec_tx_timeout(struct net_device *dev) { pr_info("%s\n", dev->name); netif_trans_update(dev); netif_wake_queue(dev); }

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Chas Williams2583.33%250.00%
Florian Westphal310.00%125.00%
Joe Perches26.67%125.00%
Total30100.00%4100.00%


static netdev_tx_t lec_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct sk_buff *skb2; struct lec_priv *priv = netdev_priv(dev); struct lecdatahdr_8023 *lec_h; struct atm_vcc *vcc; struct lec_arp_table *entry; unsigned char *dst; int min_frame_size; int is_rdesc; pr_debug("called\n"); if (!priv->lecd) { pr_info("%s:No lecd attached\n", dev->name); dev->stats.tx_errors++; netif_stop_queue(dev); kfree_skb(skb); return NETDEV_TX_OK; } pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n", (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb), (long)skb_end_pointer(skb)); #if IS_ENABLED(CONFIG_BRIDGE) if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0) lec_handle_bridge(skb, dev); #endif /* Make sure we have room for lec_id */ if (skb_headroom(skb) < 2) { pr_debug("reallocating skb\n"); skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN); if (unlikely(!skb2)) { kfree_skb(skb); return NETDEV_TX_OK; } consume_skb(skb); skb = skb2; } skb_push(skb, 2); /* Put le header to place */ lec_h = (struct lecdatahdr_8023 *)skb->data; lec_h->le_header = htons(priv->lecid); #if DUMP_PACKETS >= 2 #define MAX_DUMP_SKB 99 #elif DUMP_PACKETS >= 1 #define MAX_DUMP_SKB 30 #endif #if DUMP_PACKETS >= 1 printk(KERN_DEBUG "%s: send datalen:%ld lecid:%4.4x\n", dev->name, skb->len, priv->lecid); print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1, skb->data, min(skb->len, MAX_DUMP_SKB), true); #endif /* DUMP_PACKETS >= 1 */ /* Minimum ethernet-frame size */ min_frame_size = LEC_MINIMUM_8023_SIZE; if (skb->len < min_frame_size) { if ((skb->len + skb_tailroom(skb)) < min_frame_size) { skb2 = skb_copy_expand(skb, 0, min_frame_size - skb->truesize, GFP_ATOMIC); dev_kfree_skb(skb); if (skb2 == NULL) { dev->stats.tx_dropped++; return NETDEV_TX_OK; } skb = skb2; } skb_put(skb, min_frame_size - skb->len); } /* Send to right vcc */ is_rdesc = 0; dst = lec_h->h_dest; entry = NULL; vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry); pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n", dev->name, vcc, vcc ? vcc->flags : 0, entry); if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) { if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) { pr_debug("%s:queuing packet, MAC address %pM\n", dev->name, lec_h->h_dest); skb_queue_tail(&entry->tx_wait, skb); } else { pr_debug("%s:tx queue full or no arp entry, dropping, MAC address: %pM\n", dev->name, lec_h->h_dest); dev->stats.tx_dropped++; dev_kfree_skb(skb); } goto out; } #if DUMP_PACKETS > 0 printk(KERN_DEBUG "%s:sending to vpi:%d vci:%d\n", dev->name, vcc->vpi, vcc->vci); #endif /* DUMP_PACKETS > 0 */ while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) { pr_debug("emptying tx queue, MAC address %pM\n", lec_h->h_dest); lec_send(vcc, skb2); } lec_send(vcc, skb); if (!atm_may_send(vcc, 0)) { struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); vpriv->xoff = 1; netif_stop_queue(dev); /* * vcc->pop() might have occurred in between, making * the vcc usuable again. Since xmit is serialized, * this is the only situation we have to re-test. */ if (atm_may_send(vcc, 0)) netif_wake_queue(dev); } out: if (entry) lec_arp_put(entry); netif_trans_update(dev); return NETDEV_TX_OK; }

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Linus Torvalds (pre-git)45065.79%518.52%
Chas Williams12017.54%518.52%
Joe Perches436.29%27.41%
Eric Dumazet152.19%13.70%
Stephen Hemminger111.61%311.11%
David S. Miller111.61%13.70%
Linus Torvalds101.46%13.70%
Patrick McHardy91.32%27.41%
Arnaldo Carvalho de Melo60.88%27.41%
Wang Chen30.44%13.70%
Florian Westphal30.44%13.70%
Andrew Morton10.15%13.70%
Javier Martinez Canillas10.15%13.70%
Paul Gortmaker10.15%13.70%
Total684100.00%27100.00%

/* The inverse routine to net_open(). */
static int lec_close(struct net_device *dev) { netif_stop_queue(dev); return 0; }

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Linus Torvalds (pre-git)19100.00%2100.00%
Total19100.00%2100.00%


static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb) { unsigned long flags; struct net_device *dev = (struct net_device *)vcc->proto_data; struct lec_priv *priv = netdev_priv(dev); struct atmlec_msg *mesg; struct lec_arp_table *entry; int i; char *tmp; /* FIXME */ atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); mesg = (struct atmlec_msg *)skb->data; tmp = skb->data; tmp += sizeof(struct atmlec_msg); pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type); switch (mesg->type) { case l_set_mac_addr: for (i = 0; i < 6; i++) dev->dev_addr[i] = mesg->content.normal.mac_addr[i]; break; case l_del_mac_addr: for (i = 0; i < 6; i++) dev->dev_addr[i] = 0; break; case l_addr_delete: lec_addr_delete(priv, mesg->content.normal.atm_addr, mesg->content.normal.flag); break; case l_topology_change: priv->topology_change = mesg->content.normal.flag; break; case l_flush_complete: lec_flush_complete(priv, mesg->content.normal.flag); break; case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */ spin_lock_irqsave(&priv->lec_arp_lock, flags); entry = lec_arp_find(priv, mesg->content.normal.mac_addr); lec_arp_remove(priv, entry); spin_unlock_irqrestore(&priv->lec_arp_lock, flags); if (mesg->content.normal.no_source_le_narp) break; /* FALL THROUGH */ case l_arp_update: lec_arp_update(priv, mesg->content.normal.mac_addr, mesg->content.normal.atm_addr, mesg->content.normal.flag, mesg->content.normal.targetless_le_arp); pr_debug("in l_arp_update\n"); if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */ pr_debug("LANE2 3.1.5, got tlvs, size %d\n", mesg->sizeoftlvs); lane2_associate_ind(dev, mesg->content.normal.mac_addr, tmp, mesg->sizeoftlvs); } break; case l_config: priv->maximum_unknown_frame_count = mesg->content.config.maximum_unknown_frame_count; priv->max_unknown_frame_time = (mesg->content.config.max_unknown_frame_time * HZ); priv->max_retry_count = mesg->content.config.max_retry_count; priv->aging_time = (mesg->content.config.aging_time * HZ); priv->forward_delay_time = (mesg->content.config.forward_delay_time * HZ); priv->arp_response_time = (mesg->content.config.arp_response_time * HZ); priv->flush_timeout = (mesg->content.config.flush_timeout * HZ); priv->path_switching_delay = (mesg->content.config.path_switching_delay * HZ); priv->lane_version = mesg->content.config.lane_version; /* LANE2 */ priv->lane2_ops = NULL; if (priv->lane_version > 1) priv->lane2_ops = &lane2_ops; rtnl_lock(); if (dev_set_mtu(dev, mesg->content.config.mtu)) pr_info("%s: change_mtu to %d failed\n", dev->name, mesg->content.config.mtu); rtnl_unlock(); priv->is_proxy = mesg->content.config.is_proxy; break; case l_flush_tran_id: lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr, mesg->content.normal.flag); break; case l_set_lecid: priv->lecid = (unsigned short)(0xffff & mesg->content.normal.flag); break; case l_should_bridge: #if IS_ENABLED(CONFIG_BRIDGE) { pr_debug("%s: bridge zeppelin asks about %pM\n", dev->name, mesg->content.proxy.mac_addr); if (br_fdb_test_addr_hook == NULL) break; if (br_fdb_test_addr_hook(dev, mesg->content.proxy.mac_addr)) { /* hit from bridge table, send LE_ARP_RESPONSE */ struct sk_buff *skb2; struct sock *sk; pr_debug("%s: entry found, responding to zeppelin\n", dev->name); skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); if (skb2 == NULL) break; skb2->len = sizeof(struct atmlec_msg); skb_copy_to_linear_data(skb2, mesg, sizeof(*mesg)); atm_force_charge(priv->lecd, skb2->truesize); sk = sk_atm(priv->lecd); skb_queue_tail(&sk->sk_receive_queue, skb2); sk->sk_data_ready(sk); } } #endif /* IS_ENABLED(CONFIG_BRIDGE) */ break; default: pr_info("%s: Unknown message type %d\n", dev->name, mesg->type); dev_kfree_skb(skb); return -EINVAL; } dev_kfree_skb(skb); return 0; }

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Linus Torvalds (pre-git)74289.51%314.29%
Chas Williams394.70%628.57%
Arnaldo Carvalho de Melo212.53%314.29%
David S. Miller70.84%14.76%
Stephen Hemminger60.72%29.52%
Joe Perches40.48%29.52%
Michał Mirosław40.48%14.76%
Wang Chen30.36%14.76%
Javier Martinez Canillas20.24%14.76%
Johannes Berg10.12%14.76%
Total829100.00%21100.00%


static void lec_atm_close(struct atm_vcc *vcc) { struct sk_buff *skb; struct net_device *dev = (struct net_device *)vcc->proto_data; struct lec_priv *priv = netdev_priv(dev); priv->lecd = NULL; /* Do something needful? */ netif_stop_queue(dev); lec_arp_destroy(priv); if (skb_peek(&sk_atm(vcc)->sk_receive_queue)) pr_info("%s closing with messages pending\n", dev->name); while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) { atm_return(vcc, skb->truesize); dev_kfree_skb(skb); } pr_info("%s: Shut down!\n", dev->name); module_put(THIS_MODULE); }

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Linus Torvalds (pre-git)10684.13%225.00%
Arnaldo Carvalho de Melo86.35%225.00%
Chas Williams64.76%225.00%
Wang Chen32.38%112.50%
Joe Perches32.38%112.50%
Total126100.00%8100.00%

static struct atmdev_ops lecdev_ops = { .close = lec_atm_close, .send = lec_atm_send }; static struct atm_dev lecatm_dev = { .ops = &lecdev_ops, .type = "lec", .number = 999, /* dummy device number */ .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock) }; /* * LANE2: new argument struct sk_buff *data contains * the LE_ARP based TLVs introduced in the LANE2 spec */
static int send_to_lecd(struct lec_priv *priv, atmlec_msg_type type, const unsigned char *mac_addr, const unsigned char *atm_addr, struct sk_buff *data) { struct sock *sk; struct sk_buff *skb; struct atmlec_msg *mesg; if (!priv || !priv->lecd) return -1; skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); if (!skb) return -1; skb->len = sizeof(struct atmlec_msg); mesg = (struct atmlec_msg *)skb->data; memset(mesg, 0, sizeof(struct atmlec_msg)); mesg->type = type; if (data != NULL) mesg->sizeoftlvs = data->len; if (mac_addr) ether_addr_copy(mesg->content.normal.mac_addr, mac_addr); else mesg->content.normal.targetless_le_arp = 1; if (atm_addr) memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN); atm_force_charge(priv->lecd, skb->truesize); sk = sk_atm(priv->lecd); skb_queue_tail(&sk->sk_receive_queue, skb); sk->sk_data_ready(sk); if (data != NULL) { pr_debug("about to send %d bytes of data\n", data->len); atm_force_charge(priv->lecd, data->truesize); skb_queue_tail(&sk->sk_receive_queue, data); sk->sk_data_ready(sk); } return 0; }

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Linus Torvalds (pre-git)23687.73%19.09%
Arnaldo Carvalho de Melo155.58%218.18%
Chas Williams134.83%436.36%
Mitchell Blank Jr.20.74%19.09%
Joe Perches20.74%218.18%
Stephen Hemminger10.37%19.09%
Total269100.00%11100.00%


static void lec_set_multicast_list(struct net_device *dev) { /* * by default, all multicast frames arrive over the bus. * eventually support selective multicast service */ }

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Chas Williams12100.00%2100.00%
Total12100.00%2100.00%

static const struct net_device_ops lec_netdev_ops = { .ndo_open = lec_open, .ndo_stop = lec_close, .ndo_start_xmit = lec_start_xmit, .ndo_tx_timeout = lec_tx_timeout, .ndo_set_rx_mode = lec_set_multicast_list, }; static const unsigned char lec_ctrl_magic[] = { 0xff, 0x00, 0x01, 0x01 }; #define LEC_DATA_DIRECT_8023 2 #define LEC_DATA_DIRECT_8025 3
static int lec_is_data_direct(struct atm_vcc *vcc) { return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) || (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025)); }

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Scott Talbert58100.00%1100.00%
Total58100.00%1100.00%


static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb) { unsigned long flags; struct net_device *dev = (struct net_device *)vcc->proto_data; struct lec_priv *priv = netdev_priv(dev); #if DUMP_PACKETS > 0 printk(KERN_DEBUG "%s: vcc vpi:%d vci:%d\n", dev->name, vcc->vpi, vcc->vci); #endif if (!skb) { pr_debug("%s: null skb\n", dev->name); lec_vcc_close(priv, vcc); return; } #if DUMP_PACKETS >= 2 #define MAX_SKB_DUMP 99 #elif DUMP_PACKETS >= 1 #define MAX_SKB_DUMP 30 #endif #if DUMP_PACKETS > 0 printk(KERN_DEBUG "%s: rcv datalen:%ld lecid:%4.4x\n", dev->name, skb->len, priv->lecid); print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1, skb->data, min(MAX_SKB_DUMP, skb->len), true); #endif /* DUMP_PACKETS > 0 */ if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) { /* Control frame, to daemon */ struct sock *sk = sk_atm(vcc); pr_debug("%s: To daemon\n", dev->name); skb_queue_tail(&sk->sk_receive_queue, skb); sk->sk_data_ready(sk); } else { /* Data frame, queue to protocol handlers */ struct lec_arp_table *entry; unsigned char *src, *dst; atm_return(vcc, skb->truesize); if (*(__be16 *) skb->data == htons(priv->lecid) || !priv->lecd || !(dev->flags & IFF_UP)) { /* * Probably looping back, or if lecd is missing, * lecd has gone down */ pr_debug("Ignoring frame...\n"); dev_kfree_skb(skb); return; } dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest; /* * If this is a Data Direct VCC, and the VCC does not match * the LE_ARP cache entry, delete the LE_ARP cache entry. */ spin_lock_irqsave(&priv->lec_arp_lock, flags); if (lec_is_data_direct(vcc)) { src = ((struct lecdatahdr_8023 *)skb->data)->h_source; entry = lec_arp_find(priv, src); if (entry && entry->vcc != vcc) { lec_arp_remove(priv, entry); lec_arp_put(entry); } } spin_unlock_irqrestore(&priv->lec_arp_lock, flags); if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */ !priv->is_proxy && /* Proxy wants all the packets */ memcmp(dst, dev->dev_addr, dev->addr_len)) { dev_kfree_skb(skb); return; } if (!hlist_empty(&priv->lec_arp_empty_ones)) lec_arp_check_empties(priv, vcc, skb); skb_pull(skb, 2); /* skip lec_id */ skb->protocol = eth_type_trans(skb, dev); dev->stats.rx_packets++; dev->stats.rx_bytes += skb->len; memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); netif_rx(skb); } }

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Linus Torvalds (pre-git)31362.23%418.18%
Scott Talbert8817.50%14.55%
Chas Williams469.15%1045.45%
Joe Perches367.16%14.55%
Arnaldo Carvalho de Melo112.19%29.09%
Stephen Hemminger50.99%29.09%
Wang Chen30.60%14.55%
Al Viro10.20%14.55%
Total503100.00%22100.00%


static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb) { struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); struct net_device *dev = skb->dev; if (vpriv == NULL) { pr_info("vpriv = NULL!?!?!?\n"); return; } vpriv->old_pop(vcc, skb); if (vpriv->xoff && atm_may_send(vcc, 0)) { vpriv->xoff = 0; if (netif_running(dev) && netif_queue_stopped(dev)) netif_wake_queue(dev); } }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams9497.92%266.67%
Joe Perches22.08%133.33%
Total96100.00%3100.00%


static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg) { struct lec_vcc_priv *vpriv; int bytes_left; struct atmlec_ioc ioc_data; /* Lecd must be up in this case */ bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc)); if (bytes_left != 0) pr_info("copy from user failed for %d bytes\n", bytes_left); if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF || !dev_lec[ioc_data.dev_num]) return -EINVAL; vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL); if (!vpriv) return -ENOMEM; vpriv->xoff = 0; vpriv->old_pop = vcc->pop; vcc->user_back = vpriv; vcc->pop = lec_pop; lec_vcc_added(netdev_priv(dev_lec[ioc_data.dev_num]), &ioc_data, vcc, vcc->push); vcc->proto_data = dev_lec[ioc_data.dev_num]; vcc->push = lec_push; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)10862.07%111.11%
Chas Williams5330.46%333.33%
Joe Perches74.02%222.22%
Wang Chen31.72%111.11%
Andrew Morton21.15%111.11%
Al Viro10.57%111.11%
Total174100.00%9100.00%


static int lec_mcast_attach(struct atm_vcc *vcc, int arg) { if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg]) return -EINVAL; vcc->proto_data = dev_lec[arg]; return lec_mcast_make(netdev_priv(dev_lec[arg]), vcc); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)5392.98%133.33%
Wang Chen35.26%133.33%
Chas Williams11.75%133.33%
Total57100.00%3100.00%

/* Initialize device. */
static int lecd_attach(struct atm_vcc *vcc, int arg) { int i; struct lec_priv *priv; if (arg < 0) i = 0; else i = arg; if (arg >= MAX_LEC_ITF) return -EINVAL; if (!dev_lec[i]) { int size; size = sizeof(struct lec_priv); dev_lec[i] = alloc_etherdev(size); if (!dev_lec[i]) return -ENOMEM; dev_lec[i]->netdev_ops = &lec_netdev_ops; dev_lec[i]->max_mtu = 18190; snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i); if (register_netdev(dev_lec[i])) { free_netdev(dev_lec[i]); return -EINVAL; } priv = netdev_priv(dev_lec[i]); } else { priv = netdev_priv(dev_lec[i]); if (priv->lecd) return -EADDRINUSE; } lec_arp_init(priv); priv->itfnum = i; /* LANE2 addition */ priv->lecd = vcc; vcc->dev = &lecatm_dev; vcc_insert_socket(sk_atm(vcc)); vcc->proto_data = dev_lec[i]; set_bit(ATM_VF_META, &vcc->flags); set_bit(ATM_VF_READY, &vcc->flags); /* Set default values to these variables */ priv->maximum_unknown_frame_count = 1; priv->max_unknown_frame_time = (1 * HZ); priv->vcc_timeout_period = (1200 * HZ); priv->max_retry_count = 1; priv->aging_time = (300 * HZ); priv->forward_delay_time = (15 * HZ); priv->topology_change = 0; priv->arp_response_time = (1 * HZ); priv->flush_timeout = (4 * HZ); priv->path_switching_delay = (6 * HZ); if (dev_lec[i]->flags & IFF_UP) netif_start_queue(dev_lec[i]); __module_get(THIS_MODULE); return i; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)27977.50%430.77%
Chas Williams6217.22%538.46%
Jarod Wilson92.50%17.69%
Wang Chen61.67%17.69%
Arnaldo Carvalho de Melo30.83%17.69%
Al Viro10.28%17.69%
Total360100.00%13100.00%

#ifdef CONFIG_PROC_FS
static const char *lec_arp_get_status_string(unsigned char status) { static const char *const lec_arp_status_string[] = { "ESI_UNKNOWN ", "ESI_ARP_PENDING ", "ESI_VC_PENDING ", "<Undefined> ", "ESI_FLUSH_PENDING ", "ESI_FORWARD_DIRECT" }; if (status > ESI_FORWARD_DIRECT) status = 3; /* ESI_UNDEFINED */ return lec_arp_status_string[status]; }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams4690.20%125.00%
Jan Engelhardt35.88%125.00%
Linus Torvalds (pre-git)23.92%250.00%
Total51100.00%4100.00%


static void lec_info(struct seq_file *seq, struct lec_arp_table *entry) { int i; for (i = 0; i < ETH_ALEN; i++) seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff); seq_printf(seq, " "); for (i = 0; i < ATM_ESA_LEN; i++) seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff); seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status), entry->flags & 0xffff); if (entry->vcc) seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci); else seq_printf(seq, " "); if (entry->recv_vcc) { seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi, entry->recv_vcc->vci); } seq_putc(seq, '\n'); }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams16294.74%266.67%
Linus Torvalds (pre-git)95.26%133.33%
Total171100.00%3100.00%

struct lec_state { unsigned long flags; struct lec_priv *locked; struct hlist_node *node; struct net_device *dev; int itf; int arp_table; int misc_table; };
static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl, loff_t *l) { struct hlist_node *e = state->node; if (!e) e = tbl->first; if (e == SEQ_START_TOKEN) { e = tbl->first; --*l; } for (; e; e = e->next) { if (--*l < 0) break; } state->node = e; return (*l < 0) ? state : NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams8888.89%342.86%
Linus Torvalds (pre-git)77.07%228.57%
Sasha Levin33.03%114.29%
Joe Perches11.01%114.29%
Total99100.00%7100.00%


static void *lec_arp_walk(struct lec_state *state, loff_t *l, struct lec_priv *priv) { void *v = NULL; int p; for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) { v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l); if (v) break; } state->arp_table = p; return v; }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams78100.00%2100.00%
Total78100.00%2100.00%


static void *lec_misc_walk(struct lec_state *state, loff_t *l, struct lec_priv *priv) { struct hlist_head *lec_misc_tables[] = { &priv->lec_arp_empty_ones, &priv->lec_no_forward, &priv->mcast_fwds }; void *v = NULL; int q; for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) { v = lec_tbl_walk(state, lec_misc_tables[q], l); if (v) break; } state->misc_table = q; return v; }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams101100.00%2100.00%
Total101100.00%2100.00%


static void *lec_priv_walk(struct lec_state *state, loff_t *l, struct lec_priv *priv) { if (!state->locked) { state->locked = priv; spin_lock_irqsave(&priv->lec_arp_lock, state->flags); } if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) { spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags); state->locked = NULL; /* Partial state reset for the next time we get called */ state->arp_table = state->misc_table = 0; } return state->locked; }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams106100.00%1100.00%
Total106100.00%1100.00%


static void *lec_itf_walk(struct lec_state *state, loff_t *l) { struct net_device *dev; void *v; dev = state->dev ? state->dev : dev_lec[state->itf]; v = (dev && netdev_priv(dev)) ? lec_priv_walk(state, l, netdev_priv(dev)) : NULL; if (!v && dev) { dev_put(dev); /* Partial state reset for the next time we get called */ dev = NULL; } state->dev = dev; return v; }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams8993.68%150.00%
Wang Chen66.32%150.00%
Total95100.00%2100.00%


static void *lec_get_idx(struct lec_state *state, loff_t l) { void *v = NULL; for (; state->itf < MAX_LEC_ITF; state->itf++) { v = lec_itf_walk(state, &l); if (v) break; } return v; }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams55100.00%1100.00%
Total55100.00%1100.00%


static void *lec_seq_start(struct seq_file *seq, loff_t *pos) { struct lec_state *state = seq->private; state->itf = 0; state->dev = NULL; state->locked = NULL; state->arp_table = 0; state->misc_table = 0; state->node = SEQ_START_TOKEN; return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN; }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams7397.33%266.67%
Joe Perches22.67%133.33%
Total75100.00%3100.00%


static void lec_seq_stop(struct seq_file *seq, void *v) { struct lec_state *state = seq->private; if (state->dev) { spin_unlock_irqrestore(&state->locked->lec_arp_lock, state->flags); dev_put(state->dev); } }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams53100.00%1100.00%
Total53100.00%1100.00%


static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos) { struct lec_state *state = seq->private; v = lec_get_idx(state, 1); *pos += !!PTR_ERR(v); return v; }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams51100.00%1100.00%
Total51100.00%1100.00%


static int lec_seq_show(struct seq_file *seq, void *v) { static const char lec_banner[] = "Itf MAC ATM destination" " Status Flags " "VPI/VCI Recv VPI/VCI\n"; if (v == SEQ_START_TOKEN) seq_puts(seq, lec_banner); else { struct lec_state *state = seq->private; struct net_device *dev = state->dev; struct lec_arp_table *entry = hlist_entry(state->node, struct lec_arp_table, next); seq_printf(seq, "%s ", dev->name); lec_info(seq, entry); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams9597.94%250.00%
Jan Engelhardt11.03%125.00%
Joe Perches11.03%125.00%
Total97100.00%4100.00%

static const struct seq_operations lec_seq_ops = { .start = lec_seq_start, .next = lec_seq_next, .stop = lec_seq_stop, .show = lec_seq_show, };
static int lec_seq_open(struct inode *inode, struct file *file) { return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state)); }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams2580.65%150.00%
Pavel Emelyanov619.35%150.00%
Total31100.00%2100.00%

static const struct file_operations lec_seq_fops = { .owner = THIS_MODULE, .open = lec_seq_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release_private, }; #endif
static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) { struct atm_vcc *vcc = ATM_SD(sock); int err = 0; switch (cmd) { case ATMLEC_CTRL: case ATMLEC_MCAST: case ATMLEC_DATA: if (!capable(CAP_NET_ADMIN)) return -EPERM; break; default: return -ENOIOCTLCMD; } switch (cmd) { case ATMLEC_CTRL: err = lecd_attach(vcc, (int)arg); if (err >= 0) sock->state = SS_CONNECTED; break; case ATMLEC_MCAST: err = lec_mcast_attach(vcc, (int)arg); break; case ATMLEC_DATA: err = lec_vcc_attach(vcc, (void __user *)arg); break; } return err; }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams13799.28%150.00%
Al Viro10.72%150.00%
Total138100.00%2100.00%

static struct atm_ioctl lane_ioctl_ops = { .owner = THIS_MODULE, .ioctl = lane_ioctl, };
static int __init lane_module_init(void) { #ifdef CONFIG_PROC_FS struct proc_dir_entry *p; p = proc_create("lec", S_IRUGO, atm_proc_root, &lec_seq_fops); if (!p) { pr_err("Unable to initialize /proc/net/atm/lec\n"); return -ENOMEM; } #endif register_atm_ioctl(&lane_ioctl_ops); pr_info("lec.c: initialized\n"); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams4266.67%228.57%
Wang Chen1828.57%228.57%
Joe Perches23.17%228.57%
Michal Marek11.59%114.29%
Total63100.00%7100.00%


static void __exit lane_module_cleanup(void) { int i; #ifdef CONFIG_PROC_FS remove_proc_entry("lec", atm_proc_root); #endif deregister_atm_ioctl(&lane_ioctl_ops); for (i = 0; i < MAX_LEC_ITF; i++) { if (dev_lec[i] != NULL) { unregister_netdev(dev_lec[i]); free_netdev(dev_lec[i]); dev_lec[i] = NULL; } } }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)4253.16%114.29%
Chas Williams2329.11%342.86%
Linus Torvalds810.13%114.29%
Augusto Mecking Caringi56.33%114.29%
Stephen Hemminger11.27%114.29%
Total79100.00%7100.00%

module_init(lane_module_init); module_exit(lane_module_cleanup); /* * LANE2: 3.1.3, LE_RESOLVE.request * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs. * If sizeoftlvs == NULL the default TLVs associated with with this * lec will be used. * If dst_mac == NULL, targetless LE_ARP will be sent */
static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force, u8 **tlvs, u32 *sizeoftlvs) { unsigned long flags; struct lec_priv *priv = netdev_priv(dev); struct lec_arp_table *table; struct sk_buff *skb; int retval; if (force == 0) { spin_lock_irqsave(&priv->lec_arp_lock, flags); table = lec_arp_find(priv, dst_mac); spin_unlock_irqrestore(&priv->lec_arp_lock, flags); if (table == NULL) return -1; *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC); if (*tlvs == NULL) return -1; *sizeoftlvs = table->sizeoftlvs; return 0; } if (sizeoftlvs == NULL) retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL); else { skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC); if (skb == NULL) return -1; skb->len = *sizeoftlvs; skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs); retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb); } return retval; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)18484.02%116.67%
Chas Williams2511.42%116.67%
Arnaldo Carvalho de Melo62.74%233.33%
Wang Chen31.37%116.67%
Mitchell Blank Jr.10.46%116.67%
Total219100.00%6100.00%

/* * LANE2: 3.1.4, LE_ASSOCIATE.request * Associate the *tlvs with the *lan_dst address. * Will overwrite any previous association * Returns 1 for success, 0 for failure (out of memory) * */
static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst, const u8 *tlvs, u32 sizeoftlvs) { int retval; struct sk_buff *skb; struct lec_priv *priv = netdev_priv(dev); if (!ether_addr_equal(lan_dst, dev->dev_addr)) return 0; /* not our mac address */ kfree(priv->tlvs); /* NULL if there was no previous association */ priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); if (priv->tlvs == NULL) return 0; priv->sizeoftlvs = sizeoftlvs; skb = alloc_skb(sizeoftlvs, GFP_ATOMIC); if (skb == NULL) return 0; skb->len = sizeoftlvs; skb_copy_to_linear_data(skb, tlvs, sizeoftlvs); retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb); if (retval != 0) pr_info("lec.c: lane2_associate_req() failed\n"); /* * If the previous association has changed we must * somehow notify other LANE entities about the change */ return 1; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)14691.82%112.50%
Arnaldo Carvalho de Melo42.52%225.00%
Wang Chen31.89%112.50%
Joe Perches31.89%225.00%
Mitchell Blank Jr.21.26%112.50%
Chas Williams10.63%112.50%
Total159100.00%8100.00%

/* * LANE2: 3.1.5, LE_ASSOCIATE.indication * */
static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr, const u8 *tlvs, u32 sizeoftlvs) { #if 0 int i = 0; #endif struct lec_priv *priv = netdev_priv(dev); #if 0 /* * Why have the TLVs in LE_ARP entries * since we do not use them? When you * uncomment this code, make sure the * TLVs get freed when entry is killed */ struct lec_arp_table *entry = lec_arp_find(priv, mac_addr); if (entry == NULL) return; /* should not happen */ kfree(entry->tlvs); entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); if (entry->tlvs == NULL) return; entry->sizeoftlvs = sizeoftlvs; #endif #if 0 pr_info("\n"); pr_info("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs); while (i < sizeoftlvs) pr_cont("%02x ", tlvs[i++]); pr_cont("\n"); #endif /* tell MPOA about the TLVs we saw */ if (priv->lane2_ops && priv->lane2_ops->associate_indicator) { priv->lane2_ops->associate_indicator(dev, mac_addr, tlvs, sizeoftlvs); } }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)7689.41%116.67%
Wang Chen33.53%116.67%
Chas Williams22.35%116.67%
Mitchell Blank Jr.22.35%116.67%
Joe Perches11.18%116.67%
Arnaldo Carvalho de Melo11.18%116.67%
Total85100.00%6100.00%

/* * Here starts what used to lec_arpc.c * * lec_arpc.c was added here when making * lane client modular. October 1997 */ #include <linux/types.h> #include <linux/timer.h> #include <linux/param.h> #include <linux/atomic.h> #include <linux/inetdevice.h> #include <net/route.h> #if 0 #define pr_debug(format, args...) /* #define pr_debug printk */ #endif #define DEBUG_ARP_TABLE 0 #define LEC_ARP_REFRESH_INTERVAL (3*HZ) static void lec_arp_check_expire(struct work_struct *work); static void lec_arp_expire_arp(unsigned long data); /* * Arp table funcs */ #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE - 1)) /* * Initialization of arp-cache */
static void lec_arp_init(struct lec_priv *priv) { unsigned short i; for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); INIT_HLIST_HEAD(&priv->lec_no_forward); INIT_HLIST_HEAD(&priv->mcast_fwds); spin_lock_init(&priv->lec_arp_lock); INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire); schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)4650.55%116.67%
Chas Williams4448.35%466.67%
David Howells11.10%116.67%
Total91100.00%6100.00%


static void lec_arp_clear_vccs(struct lec_arp_table *entry) { if (entry->vcc) { struct atm_vcc *vcc = entry->vcc; struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); struct net_device *dev = (struct net_device *)vcc->proto_data; vcc->pop = vpriv->old_pop; if (vpriv->xoff) netif_wake_queue(dev); kfree(vpriv); vcc->user_back = NULL; vcc->push = entry->old_push; vcc_release_async(vcc, -EPIPE); entry->vcc = NULL; } if (entry->recv_vcc) { entry->recv_vcc->push = entry->old_recv_push; vcc_release_async(entry->recv_vcc, -EPIPE); entry->recv_vcc = NULL; } }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)7252.17%116.67%
Chas Williams6446.38%466.67%
Andrew Morton21.45%116.67%
Total138100.00%6100.00%

/* * Insert entry to lec_arp_table * LANE2: Add to the end of the list to satisfy 8.1.13 */
static inline void lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry) { struct hlist_head *tmp; tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])]; hlist_add_head(&entry->next, tmp); pr_debug("Added entry:%pM\n", entry->mac_addr); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)3963.93%116.67%
Chas Williams2032.79%350.00%
Stephen Hemminger11.64%116.67%
Joe Perches11.64%116.67%
Total61100.00%6100.00%

/* * Remove entry from lec_arp_table */
static int lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove) { struct lec_arp_table *entry; int i, remove_vcc = 1; if (!to_remove) return -1; hlist_del(&to_remove->next); del_timer(&to_remove->timer); /* * If this is the only MAC connected to this VCC, * also tear down the VCC */ if (to_remove->status >= ESI_FLUSH_PENDING) { /* * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT */ for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { hlist_for_each_entry(entry, &priv->lec_arp_tables[i], next) { if (memcmp(to_remove->atm_addr, entry->atm_addr, ATM_ESA_LEN) == 0) { remove_vcc = 0; break; } } } if (remove_vcc) lec_arp_clear_vccs(to_remove); } skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */ pr_debug("Removed entry:%pM\n", to_remove->mac_addr); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)11881.94%114.29%
Chas Williams2315.97%342.86%
Joe Perches21.39%228.57%
Stephen Hemminger10.69%114.29%
Total144100.00%7100.00%

#if DEBUG_ARP_TABLE
static const char *get_status_string(unsigned char st) { switch (st) { case ESI_UNKNOWN: return "ESI_UNKNOWN"; case ESI_ARP_PENDING: return "ESI_ARP_PENDING"; case ESI_VC_PENDING: return "ESI_VC_PENDING"; case ESI_FLUSH_PENDING: return "ESI_FLUSH_PENDING"; case ESI_FORWARD_DIRECT: return "ESI_FORWARD_DIRECT"; } return "<UNKNOWN>"; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)4996.08%133.33%
Jan Engelhardt11.96%133.33%
Joe Perches11.96%133.33%
Total51100.00%3100.00%


static void dump_arp_table(struct lec_priv *priv) { struct lec_arp_table *rulla; char buf[256]; int i, j, offset; pr_info("Dump %p:\n", priv); for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { hlist_for_each_entry(rulla, &priv->lec_arp_tables[i], next) { offset = 0; offset += sprintf(buf, "%d: %p\n", i, rulla); offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr); offset += sprintf(buf + offset, " Atm:"); for (j = 0; j < ATM_ESA_LEN; j++) { offset += sprintf(buf + offset, "%2.2x ", rulla->atm_addr[j] & 0xff); } offset += sprintf(buf + offset, "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", rulla->vcc ? rulla->vcc->vpi : 0, rulla->vcc ? rulla->vcc->vci : 0, rulla->recv_vcc ? rulla->recv_vcc-> vpi : 0, rulla->recv_vcc ? rulla->recv_vcc-> vci : 0, rulla->last_used, rulla->timestamp, rulla->no_tries); offset += sprintf(buf + offset, "Flags:%x, Packets_flooded:%x, Status: %s ", rulla->flags, rulla->packets_flooded, get_status_string(rulla->status)); pr_info("%s\n", buf); } } if (!hlist_empty(&priv->lec_no_forward)) pr_info("No forward\n"); hlist_for_each_entry(rulla, &priv->lec_no_forward, next) { offset = 0; offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr); offset += sprintf(buf + offset, " Atm:"); for (j = 0; j < ATM_ESA_LEN; j++) { offset += sprintf(buf + offset, "%2.2x ", rulla->atm_addr[j] & 0xff); } offset += sprintf(buf + offset, "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", rulla->vcc ? rulla->vcc->vpi : 0, rulla->vcc ? rulla->vcc->vci : 0, rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, rulla->recv_vcc ? rulla->recv_vcc->vci : 0, rulla->last_used, rulla->timestamp, rulla->no_tries); offset += sprintf(buf + offset, "Flags:%x, Packets_flooded:%x, Status: %s ", rulla->flags, rulla->packets_flooded, get_status_string(rulla->status)); pr_info("%s\n", buf); } if (!hlist_empty(&priv->lec_arp_empty_ones)) pr_info("Empty ones\n"); hlist_for_each_entry(rulla, &priv->lec_arp_empty_ones, next) { offset = 0; offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr); offset += sprintf(buf + offset, " Atm:"); for (j = 0; j < ATM_ESA_LEN; j++) { offset += sprintf(buf + offset, "%2.2x ", rulla->atm_addr[j] & 0xff); } offset += sprintf(buf + offset, "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", rulla->vcc ? rulla->vcc->vpi : 0, rulla->vcc ? rulla->vcc->vci : 0, rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, rulla->recv_vcc ? rulla->recv_vcc->vci : 0, rulla->last_used, rulla->timestamp, rulla->no_tries); offset += sprintf(buf + offset, "Flags:%x, Packets_flooded:%x, Status: %s ", rulla->flags, rulla->packets_flooded, get_status_string(rulla->status)); pr_info("%s", buf); } if (!hlist_empty(&priv->mcast_fwds)) pr_info("Multicast Forward VCCs\n"); hlist_for_each_entry(rulla, &priv->mcast_fwds, next) { offset = 0; offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr); offset += sprintf(buf + offset, " Atm:"); for (j = 0; j < ATM_ESA_LEN; j++) { offset += sprintf(buf + offset, "%2.2x ", rulla->atm_addr[j] & 0xff); } offset += sprintf(buf + offset, "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", rulla->vcc ? rulla->vcc->vpi : 0, rulla->vcc ? rulla->vcc->vci : 0, rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, rulla->recv_vcc ? rulla->recv_vcc->vci : 0, rulla->last_used, rulla->timestamp, rulla->no_tries); offset += sprintf(buf + offset, "Flags:%x, Packets_flooded:%x, Status: %s ", rulla->flags, rulla->packets_flooded, get_status_string(rulla->status)); pr_info("%s\n", buf); } }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)74289.61%125.00%
Chas Williams708.45%250.00%
Joe Perches161.93%125.00%
Total828100.00%4100.00%

#else #define dump_arp_table(priv) do { } while (0) #endif /* * Destruction of arp-cache */
static void lec_arp_destroy(struct lec_priv *priv) { unsigned long flags; struct hlist_node *next; struct lec_arp_table *entry; int i; cancel_delayed_work_sync(&priv->lec_arp_work); /* * Remove all entries */ spin_lock_irqsave(&priv->lec_arp_lock, flags); for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { hlist_for_each_entry_safe(entry, next, &priv->lec_arp_tables[i], next) { lec_arp_remove(priv, entry); lec_arp_put(entry); } INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); } hlist_for_each_entry_safe(entry, next, &priv->lec_arp_empty_ones, next) { del_timer_sync(&entry->timer); lec_arp_clear_vccs(entry); hlist_del(&entry->next); lec_arp_put(entry); } INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); hlist_for_each_entry_safe(entry, next, &priv->lec_no_forward, next) { del_timer_sync(&entry->timer); lec_arp_clear_vccs(entry); hlist_del(&entry->next); lec_arp_put(entry); } INIT_HLIST_HEAD(&priv->lec_no_forward); hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) { /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ lec_arp_clear_vccs(entry); hlist_del(&entry->next); lec_arp_put(entry); } INIT_HLIST_HEAD(&priv->mcast_fwds); priv->mcast_vcc = NULL; spin_unlock_irqrestore(&priv->lec_arp_lock, flags); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)12450.82%111.11%
Chas Williams11948.77%777.78%
Tejun Heo10.41%111.11%
Total244100.00%9100.00%

/* * Find entry by mac_address */
static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, const unsigned char *mac_addr) { struct hlist_head *head; struct lec_arp_table *entry; pr_debug("%pM\n", mac_addr); head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])]; hlist_for_each_entry(entry, head, next) { if (ether_addr_equal(mac_addr, entry->mac_addr)) return entry; } return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams4150.62%228.57%
Linus Torvalds (pre-git)3644.44%114.29%
Joe Perches22.47%228.57%
Mitchell Blank Jr.11.23%114.29%
Stephen Hemminger11.23%114.29%
Total81100.00%7100.00%


static struct lec_arp_table *make_entry(struct lec_priv *priv, const unsigned char *mac_addr) { struct lec_arp_table *to_return; to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC); if (!to_return) { pr_info("LEC: Arp entry kmalloc failed\n"); return NULL; } ether_addr_copy(to_return->mac_addr, mac_addr); INIT_HLIST_NODE(&to_return->next); setup_timer(&to_return->timer, lec_arp_expire_arp, (unsigned long)to_return); to_return->last_used = jiffies; to_return->priv = priv; skb_queue_head_init(&to_return->tx_wait); atomic_set(&to_return->usage, 1); return to_return; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)9177.12%111.11%
Chas Williams1916.10%333.33%
Pavel Emelyanov43.39%111.11%
Joe Perches21.69%222.22%
Mitchell Blank Jr.10.85%111.11%
Panagiotis Issaris10.85%111.11%
Total118100.00%9100.00%

/* Arp sent timer expired */
static void lec_arp_expire_arp(unsigned long data) { struct lec_arp_table *entry; entry = (struct lec_arp_table *)data; pr_debug("\n"); if (entry->status == ESI_ARP_PENDING) { if (entry->no_tries <= entry->priv->max_retry_count) { if (entry->is_rdesc) send_to_lecd(entry->priv, l_rdesc_arp_xmt, entry->mac_addr, NULL, NULL); else send_to_lecd(entry->priv, l_arp_xmt, entry->mac_addr, NULL, NULL); entry->no_tries++; } mod_timer(&entry->timer, jiffies + (1 * HZ)); } }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)10994.78%125.00%
Chas Williams43.48%125.00%
Stephen Hemminger10.87%125.00%
Joe Perches10.87%125.00%
Total115100.00%4100.00%

/* Unknown/unused vcc expire, remove associated entry */
static void lec_arp_expire_vcc(unsigned long data) { unsigned long flags; struct lec_arp_table *to_remove = (struct lec_arp_table *)data; struct lec_priv *priv = to_remove->priv; del_timer(&to_remove->timer); pr_debug("%p %p: vpi:%d vci:%d\n", to_remove, priv, to_remove->vcc ? to_remove->recv_vcc->vpi : 0, to_remove->vcc ? to_remove->recv_vcc->vci : 0); spin_lock_irqsave(&priv->lec_arp_lock, flags); hlist_del(&to_remove->next); spin_unlock_irqrestore(&priv->lec_arp_lock, flags); lec_arp_clear_vccs(to_remove); lec_arp_put(to_remove); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)8372.81%114.29%
Chas Williams2824.56%342.86%
Stephen Hemminger10.88%114.29%
Herbert Xu10.88%114.29%
Joe Perches10.88%114.29%
Total114100.00%7100.00%


static bool __lec_arp_check_expire(struct lec_arp_table *entry, unsigned long now, struct lec_priv *priv) { unsigned long time_to_check; if ((entry->flags) & LEC_REMOTE_FLAG && priv->topology_change) time_to_check = priv->forward_delay_time; else time_to_check = priv->aging_time; pr_debug("About to expire: %lx - %lx > %lx\n", now, entry->last_used, time_to_check); if (time_after(now, entry->last_used + time_to_check) && !(entry->flags & LEC_PERMANENT_FLAG) && !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */ /* Remove entry */ pr_debug("Entry timed out\n"); lec_arp_remove(priv, entry); lec_arp_put(entry); } else { /* Something else */ if ((entry->status == ESI_VC_PENDING || entry->status == ESI_ARP_PENDING) && time_after_eq(now, entry->timestamp + priv->max_unknown_frame_time)) { entry->timestamp = jiffies; entry->packets_flooded = 0; if (entry->status == ESI_VC_PENDING) send_to_lecd(priv, l_svc_setup, entry->mac_addr, entry->atm_addr, NULL); } if (entry->status == ESI_FLUSH_PENDING && time_after_eq(now, entry->timestamp + priv->path_switching_delay)) { lec_arp_hold(entry); return true; } } return false; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)19385.78%111.11%
Joe Perches2410.67%222.22%
Chas Williams52.22%444.44%
Stephen Hemminger20.89%111.11%
David Howells10.44%111.11%
Total225100.00%9100.00%

/* * Expire entries. * 1. Re-set timer * 2. For each entry, delete entries that have aged past the age limit. * 3. For each entry, depending on the status of the entry, perform * the following maintenance. * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the * tick_count is above the max_unknown_frame_time, clear * the tick_count to zero and clear the packets_flooded counter * to zero. This supports the packet rate limit per address * while flooding unknowns. * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater * than or equal to the path_switching_delay, change the status * to ESI_FORWARD_DIRECT. This causes the flush period to end * regardless of the progress of the flush protocol. */
static void lec_arp_check_expire(struct work_struct *work) { unsigned long flags; struct lec_priv *priv = container_of(work, struct lec_priv, lec_arp_work.work); struct hlist_node *next; struct lec_arp_table *entry; unsigned long now; int i; pr_debug("%p\n", priv); now = jiffies; restart: spin_lock_irqsave(&priv->lec_arp_lock, flags); for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { hlist_for_each_entry_safe(entry, next, &priv->lec_arp_tables[i], next) { if (__lec_arp_check_expire(entry, now, priv)) { struct sk_buff *skb; struct atm_vcc *vcc = entry->vcc; spin_unlock_irqrestore(&priv->lec_arp_lock, flags); while ((skb = skb_dequeue(&entry->tx_wait))) lec_send(vcc, skb); entry->last_used = jiffies; entry->status = ESI_FORWARD_DIRECT; lec_arp_put(entry); goto restart; } } } spin_unlock_irqrestore(&priv->lec_arp_lock, flags); schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); }

Contributors

PersonTokensPropCommitsCommitProp
Joe Perches10854.82%114.29%
Chas Williams6432.49%571.43%
Linus Torvalds (pre-git)2512.69%114.29%
Total197100.00%7100.00%

/* * Try to find vcc where mac_address is attached. * */
static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, const unsigned char *mac_to_find, int is_rdesc, struct lec_arp_table **ret_entry) { unsigned long flags; struct lec_arp_table *entry; struct atm_vcc *found; if (mac_to_find[0] & 0x01) { switch (priv->lane_version) { case 1: return priv->mcast_vcc; case 2: /* LANE2 wants arp for multicast addresses */ if (ether_addr_equal(mac_to_find, bus_mac)) return priv->mcast_vcc; break; default: break; } } spin_lock_irqsave(&priv->lec_arp_lock, flags); entry = lec_arp_find(priv, mac_to_find); if (entry) { if (entry->status == ESI_FORWARD_DIRECT) { /* Connection Ok */ entry->last_used = jiffies; lec_arp_hold(entry); *ret_entry = entry; found = entry->vcc; goto out; } /* * If the LE_ARP cache entry is still pending, reset count to 0 * so another LE_ARP request can be made for this frame. */ if (entry->status == ESI_ARP_PENDING) entry->no_tries = 0; /* * Data direct VC not yet set up, check to see if the unknown * frame count is greater than the limit. If the limit has * not been reached, allow the caller to send packet to * BUS. */ if (entry->status != ESI_FLUSH_PENDING && entry->packets_flooded < priv->maximum_unknown_frame_count) { entry->packets_flooded++; pr_debug("Flooding..\n"); found = priv->mcast_vcc; goto out; } /* * We got here because entry->status == ESI_FLUSH_PENDING * or BUS flood limit was reached for an entry which is * in ESI_ARP_PENDING or ESI_VC_PENDING state. */ lec_arp_hold(entry); *ret_entry = entry; pr_debug("entry->status %d entry->vcc %p\n", entry->status, entry->vcc); found = NULL; } else { /* No matching entry was found */ entry = make_entry(priv, mac_to_find); pr_debug("Making entry\n"); if (!entry) { found = priv->mcast_vcc; goto out; } lec_arp_add(priv, entry); /* We want arp-request(s) to be sent */ entry->packets_flooded = 1; entry->status = ESI_ARP_PENDING; entry->no_tries = 1; entry->last_used = entry->timestamp = jiffies; entry->is_rdesc = is_rdesc; if (entry->is_rdesc) send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL, NULL); else send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL); entry->timer.expires = jiffies + (1 * HZ); entry->timer.function = lec_arp_expire_arp; add_timer(&entry->timer); found = priv->mcast_vcc; } out: spin_unlock_irqrestore(&priv->lec_arp_lock, flags); return found; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)29775.77%19.09%
Chas Williams7318.62%545.45%
Scott Talbert143.57%19.09%
Joe Perches41.02%218.18%
Stephen Hemminger30.77%19.09%
Mitchell Blank Jr.10.26%19.09%
Total392100.00%11100.00%


static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr, unsigned long permanent) { unsigned long flags; struct hlist_node *next; struct lec_arp_table *entry; int i; pr_debug("\n"); spin_lock_irqsave(&priv->lec_arp_lock, flags); for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { hlist_for_each_entry_safe(entry, next, &priv->lec_arp_tables[i], next) { if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) && (permanent || !(entry->flags & LEC_PERMANENT_FLAG))) { lec_arp_remove(priv, entry); lec_arp_put(entry); } spin_unlock_irqrestore(&priv->lec_arp_lock, flags); return 0; } } spin_unlock_irqrestore(&priv->lec_arp_lock, flags); return -1; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)10470.27%112.50%
Chas Williams4127.70%450.00%
Joe Perches10.68%112.50%
Mitchell Blank Jr.10.68%112.50%
Stephen Hemminger10.68%112.50%
Total148100.00%8100.00%

/* * Notifies: Response to arp_request (atm_addr != NULL) */
static void lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr, const unsigned char *atm_addr, unsigned long remoteflag, unsigned int targetless_le_arp) { unsigned long flags; struct hlist_node *next; struct lec_arp_table *entry, *tmp; int i; pr_debug("%smac:%pM\n", (targetless_le_arp) ? "targetless " : "", mac_addr); spin_lock_irqsave(&priv->lec_arp_lock, flags); entry = lec_arp_find(priv, mac_addr); if (entry == NULL && targetless_le_arp) goto out; /* * LANE2: ignore targetless LE_ARPs for which * we have no entry in the cache. 7.1.30 */ if (!hlist_empty(&priv->lec_arp_empty_ones)) { hlist_for_each_entry_safe(entry, next, &priv->lec_arp_empty_ones, next) { if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) { hlist_del(&entry->next); del_timer(&entry->timer); tmp = lec_arp_find(priv, mac_addr); if (tmp) { del_timer(&tmp->timer); tmp->status = ESI_FORWARD_DIRECT; memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN); tmp->vcc = entry->vcc; tmp->old_push = entry->old_push; tmp->last_used = jiffies; del_timer(&entry->timer); lec_arp_put(entry); entry = tmp; } else { entry->status = ESI_FORWARD_DIRECT; ether_addr_copy(entry->mac_addr, mac_addr); entry->last_used = jiffies; lec_arp_add(priv, entry); } if (remoteflag) entry->flags |= LEC_REMOTE_FLAG; else entry->flags &= ~LEC_REMOTE_FLAG; pr_debug("After update\n"); dump_arp_table(priv); goto out; } } } entry = lec_arp_find(priv, mac_addr); if (!entry) { entry = make_entry(priv, mac_addr); if (!entry) goto out; entry->status = ESI_UNKNOWN; lec_arp_add(priv, entry); /* Temporary, changes before end of function */ } memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN); del_timer(&entry->timer); for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { hlist_for_each_entry(tmp, &priv->lec_arp_tables[i], next) { if (entry != tmp && !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) { /* Vcc to this host exists */ if (tmp->status > ESI_VC_PENDING) { /* * ESI_FLUSH_PENDING, * ESI_FORWARD_DIRECT */ entry->vcc = tmp->vcc; entry->old_push = tmp->old_push; } entry->status = tmp->status; break; } } } if (remoteflag) entry->flags |= LEC_REMOTE_FLAG; else entry->flags &= ~LEC_REMOTE_FLAG; if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) { entry->status = ESI_VC_PENDING; send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL); } pr_debug("After update2\n"); dump_arp_table(priv); out: spin_unlock_irqrestore(&priv->lec_arp_lock, flags); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)43683.69%18.33%
Chas Williams7213.82%650.00%
Linus Torvalds50.96%18.33%
Joe Perches30.58%216.67%
Stephen Hemminger30.58%18.33%
Mitchell Blank Jr.20.38%18.33%
Total521100.00%12100.00%

/* * Notifies: Vcc setup ready */
static void lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data, struct atm_vcc *vcc, void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb)) { unsigned long flags; struct lec_arp_table *entry; int i, found_entry = 0; spin_lock_irqsave(&priv->lec_arp_lock, flags); /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */ if (ioc_data->receive == 2) { pr_debug("LEC_ARP: Attaching mcast forward\n"); #if 0 entry = lec_arp_find(priv, bus_mac); if (!entry) { pr_info("LEC_ARP: Multicast entry not found!\n"); goto out; } memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); entry->recv_vcc = vcc; entry->old_recv_push = old_push; #endif entry = make_entry(priv, bus_mac); if (entry == NULL) goto out; del_timer(&entry->timer); memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); entry->recv_vcc = vcc; entry->old_recv_push = old_push; hlist_add_head(&entry->next, &priv->mcast_fwds); goto out; } else if (ioc_data->receive == 1) { /* * Vcc which we don't want to make default vcc, * attach it anyway. */ pr_debug("LEC_ARP:Attaching data direct, not default: %2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", ioc_data->atm_addr[0], ioc_data->atm_addr[1], ioc_data->atm_addr[2], ioc_data->atm_addr[3], ioc_data->atm_addr[4], ioc_data->atm_addr[5], ioc_data->atm_addr[6], ioc_data->atm_addr[7], ioc_data->atm_addr[8], ioc_data->atm_addr[9], ioc_data->atm_addr[10], ioc_data->atm_addr[11], ioc_data->atm_addr[12], ioc_data->atm_addr[13], ioc_data->atm_addr[14], ioc_data->atm_addr[15], ioc_data->atm_addr[16], ioc_data->atm_addr[17], ioc_data->atm_addr[18], ioc_data->atm_addr[19]); entry = make_entry(priv, bus_mac); if (entry == NULL) goto out; memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); eth_zero_addr(entry->mac_addr); entry->recv_vcc = vcc; entry->old_recv_push = old_push; entry->status = ESI_UNKNOWN; entry->timer.expires = jiffies + priv->vcc_timeout_period; entry->timer.function = lec_arp_expire_vcc; hlist_add_head(&entry->next, &priv->lec_no_forward); add_timer(&entry->timer); dump_arp_table(priv); goto out; } pr_debug("LEC_ARP:Attaching data direct, default: %2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", ioc_data->atm_addr[0], ioc_data->atm_addr[1], ioc_data->atm_addr[2], ioc_data->atm_addr[3], ioc_data->atm_addr[4], ioc_data->atm_addr[5], ioc_data->atm_addr[6], ioc_data->atm_addr[7], ioc_data->atm_addr[8], ioc_data->atm_addr[9], ioc_data->atm_addr[10], ioc_data->atm_addr[11], ioc_data->atm_addr[12], ioc_data->atm_addr[13], ioc_data->atm_addr[14], ioc_data->atm_addr[15], ioc_data->atm_addr[16], ioc_data->atm_addr[17], ioc_data->atm_addr[18], ioc_data->atm_addr[19]); for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { hlist_for_each_entry(entry, &priv->lec_arp_tables[i], next) { if (memcmp (ioc_data->atm_addr, entry->atm_addr, ATM_ESA_LEN) == 0) { pr_debug("LEC_ARP: Attaching data direct\n"); pr_debug("Currently -> Vcc: %d, Rvcc:%d\n", entry->vcc ? entry->vcc->vci : 0, entry->recv_vcc ? entry->recv_vcc-> vci : 0); found_entry = 1; del_timer(&entry->timer); entry->vcc = vcc; entry->old_push = old_push; if (entry->status == ESI_VC_PENDING) { if (priv->maximum_unknown_frame_count == 0) entry->status = ESI_FORWARD_DIRECT; else { entry->timestamp = jiffies; entry->status = ESI_FLUSH_PENDING; #if 0 send_to_lecd(priv, l_flush_xmt, NULL, entry->atm_addr, NULL); #endif } } else { /* * They were forming a connection * to us, and we to them. Our * ATM address is numerically lower * than theirs, so we make connection * we formed into default VCC (8.1.11). * Connection they made gets torn * down. This might confuse some * clients. Can be changed if * someone reports trouble... */ ; } } } } if (found_entry) { pr_debug("After vcc was added\n"); dump_arp_table(priv); goto out; } /* * Not found, snatch address from first data packet that arrives * from this vcc */ entry = make_entry(priv, bus_mac); if (!entry) goto out; entry->vcc = vcc; entry->old_push = old_push; memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); eth_zero_addr(entry->mac_addr); entry->status = ESI_UNKNOWN; hlist_add_head(&entry->next, &priv->lec_arp_empty_ones); entry->timer.expires = jiffies + priv->vcc_timeout_period; entry->timer.function = lec_arp_expire_vcc; add_timer(&entry->timer); pr_debug("After vcc was added\n"); dump_arp_table(priv); out: spin_unlock_irqrestore(&priv->lec_arp_lock, flags); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)75188.25%19.09%
Chas Williams758.81%436.36%
Linus Torvalds111.29%19.09%
Stephen Hemminger70.82%19.09%
Joe Perches60.71%327.27%
Mitchell Blank Jr.10.12%19.09%
Total851100.00%11100.00%


static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id) { unsigned long flags; struct lec_arp_table *entry; int i; pr_debug("%lx\n", tran_id); restart: spin_lock_irqsave(&priv->lec_arp_lock, flags); for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { hlist_for_each_entry(entry, &priv->lec_arp_tables[i], next) { if (entry->flush_tran_id == tran_id && entry->status == ESI_FLUSH_PENDING) { struct sk_buff *skb; struct atm_vcc *vcc = entry->vcc; lec_arp_hold(entry); spin_unlock_irqrestore(&priv->lec_arp_lock, flags); while ((skb = skb_dequeue(&entry->tx_wait))) lec_send(vcc, skb); entry->last_used = jiffies; entry->status = ESI_FORWARD_DIRECT; lec_arp_put(entry); pr_debug("LEC_ARP: Flushed\n"); goto restart; } } } spin_unlock_irqrestore(&priv->lec_arp_lock, flags); dump_arp_table(priv); }

Contributors

PersonTokensPropCommitsCommitProp
Chas Williams9955.93%562.50%
Linus Torvalds (pre-git)7542.37%112.50%
Stephen Hemminger21.13%112.50%
Joe Perches10.56%112.50%
Total177100.00%8100.00%


static void lec_set_flush_tran_id(struct lec_priv *priv, const unsigned char *atm_addr, unsigned long tran_id) { unsigned long flags; struct lec_arp_table *entry; int i; spin_lock_irqsave(&priv->lec_arp_lock, flags); for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) hlist_for_each_entry(entry, &priv->lec_arp_tables[i], next) { if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) { entry->flush_tran_id = tran_id; pr_debug("Set flush transaction id to %lx for %p\n", tran_id, entry); } } spin_unlock_irqrestore(&priv->lec_arp_lock, flags); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)7065.42%116.67%
Chas Williams3532.71%350.00%
Mitchell Blank Jr.10.93%116.67%
Stephen Hemminger10.93%116.67%
Total107100.00%6100.00%


static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc) { unsigned long flags; unsigned char mac_addr[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; struct lec_arp_table *to_add; struct lec_vcc_priv *vpriv; int err = 0; vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL); if (!vpriv) return -ENOMEM; vpriv->xoff = 0; vpriv->old_pop = vcc->pop; vcc->user_back = vpriv; vcc->pop = lec_pop; spin_lock_irqsave(&priv->lec_arp_lock, flags); to_add = make_entry(priv, mac_addr); if (!to_add) { vcc->pop = vpriv->old_pop; kfree(vpriv); err = -ENOMEM; goto out; } memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN); to_add->status = ESI_FORWARD_DIRECT; to_add->flags |= LEC_PERMANENT_FLAG; to_add->vcc = vcc; to_add->old_push = vcc->push; vcc->push = lec_push; priv->mcast_vcc = vcc; lec_arp_add(priv, to_add); out: spin_unlock_irqrestore(&priv->lec_arp_lock, flags); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)12856.64%114.29%
Chas Williams9140.27%457.14%
Joe Perches52.21%114.29%
Andrew Morton20.88%114.29%
Total226100.00%7100.00%


static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc) { unsigned long flags; struct hlist_node *next; struct lec_arp_table *entry; int i; pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci); dump_arp_table(priv); spin_lock_irqsave(&priv->lec_arp_lock, flags); for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { hlist_for_each_entry_safe(entry, next, &priv->lec_arp_tables[i], next) { if (vcc == entry->vcc) { lec_arp_remove(priv, entry); lec_arp_put(entry); if (priv->mcast_vcc == vcc) priv->mcast_vcc = NULL; } } } hlist_for_each_entry_safe(entry, next, &priv->lec_arp_empty_ones, next) { if (entry->vcc == vcc) { lec_arp_clear_vccs(entry); del_timer(&entry->timer); hlist_del(&entry->next); lec_arp_put(entry); } } hlist_for_each_entry_safe(entry, next, &priv->lec_no_forward, next) { if (entry->recv_vcc == vcc) { lec_arp_clear_vccs(entry); del_timer(&entry->timer); hlist_del(&entry->next); lec_arp_put(entry); } } hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) { if (entry->recv_vcc == vcc) { lec_arp_clear_vccs(entry); /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ hlist_del(&entry->next); lec_arp_put(entry); } } spin_unlock_irqrestore(&priv->lec_arp_lock, flags); dump_arp_table(priv); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)19369.93%116.67%
Chas Williams8229.71%466.67%
Stephen Hemminger10.36%116.67%
Total276100.00%6100.00%


static void lec_arp_check_empties(struct lec_priv *priv, struct atm_vcc *vcc, struct sk_buff *skb) { unsigned long flags; struct hlist_node *next; struct lec_arp_table *entry, *tmp; struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data; unsigned char *src = hdr->h_source; spin_lock_irqsave(&priv->lec_arp_lock, flags); hlist_for_each_entry_safe(entry, next, &priv->lec_arp_empty_ones, next) { if (vcc == entry->vcc) { del_timer(&entry->timer); ether_addr_copy(entry->mac_addr, src); entry->status = ESI_FORWARD_DIRECT; entry->last_used = jiffies; /* We might have got an entry */ tmp = lec_arp_find(priv, src); if (tmp) { lec_arp_remove(priv, tmp); lec_arp_put(tmp); } hlist_del(&entry->next); lec_arp_add(priv, entry); goto out; } } pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n"); out: spin_unlock_irqrestore(&priv->lec_arp_lock, flags); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)12668.11%110.00%
Chas Williams5228.11%550.00%
Joe Perches52.70%220.00%
Stephen Hemminger10.54%110.00%
Paul Gortmaker10.54%110.00%
Total185100.00%10100.00%

MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)726462.88%98.57%
Chas Williams335329.02%3230.48%
Joe Perches3042.63%76.67%
Scott Talbert1681.45%21.90%
Arnaldo Carvalho de Melo1030.89%76.67%
Stephen Hemminger840.73%65.71%
Wang Chen600.52%32.86%
Linus Torvalds390.34%32.86%
Mitchell Blank Jr.280.24%10.95%
David S. Miller180.16%10.95%
Eric Dumazet150.13%10.95%
Kees Cook120.10%10.95%
Pavel Emelyanov110.10%21.90%
Jarod Wilson90.08%10.95%
Patrick McHardy90.08%21.90%
Andrew Morton70.06%21.90%
Hideaki Yoshifuji / 吉藤英明60.05%10.95%
Javier Martinez Canillas60.05%10.95%
Florian Westphal60.05%10.95%
Jan Engelhardt50.04%10.95%
David Howells50.04%10.95%
Augusto Mecking Caringi50.04%10.95%
Milind Arun Choudhary40.03%10.95%
Michał Mirosław40.03%10.95%
Art Haas40.03%10.95%
Tejun Heo40.03%21.90%
Al Viro40.03%32.86%
Sasha Levin30.03%10.95%
Randy Dunlap30.03%10.95%
Paul Gortmaker20.02%10.95%
Johannes Berg10.01%10.95%
Jiri Pirko10.01%10.95%
Herbert Xu10.01%10.95%
Arun Sharma10.01%10.95%
Michal Marek10.01%10.95%
Panagiotis Issaris10.01%10.95%
Arjan van de Ven10.01%10.95%
Philippe De Muyter10.01%10.95%
Total11553100.00%105100.00%
Directory: net/atm
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