| // SPDX-License-Identifier: GPL-2.0 |
| #include <linux/netdevice.h> |
| #include <linux/proc_fs.h> |
| #include <linux/seq_file.h> |
| #include <net/wext.h> |
| |
| #define BUCKET_SPACE (32 - NETDEV_HASHBITS - 1) |
| |
| #define get_bucket(x) ((x) >> BUCKET_SPACE) |
| #define get_offset(x) ((x) & ((1 << BUCKET_SPACE) - 1)) |
| #define set_bucket_offset(b, o) ((b) << BUCKET_SPACE | (o)) |
| |
| extern struct list_head ptype_all __read_mostly; |
| extern struct list_head ptype_base[PTYPE_HASH_SIZE] __read_mostly; |
| |
| static inline struct net_device *dev_from_same_bucket(struct seq_file *seq, loff_t *pos) |
| { |
| struct net *net = seq_file_net(seq); |
| struct net_device *dev; |
| struct hlist_head *h; |
| unsigned int count = 0, offset = get_offset(*pos); |
| |
| h = &net->dev_name_head[get_bucket(*pos)]; |
| hlist_for_each_entry_rcu(dev, h, name_hlist) { |
| if (++count == offset) |
| return dev; |
| } |
| |
| return NULL; |
| } |
| |
| static inline struct net_device *dev_from_bucket(struct seq_file *seq, loff_t *pos) |
| { |
| struct net_device *dev; |
| unsigned int bucket; |
| |
| do { |
| dev = dev_from_same_bucket(seq, pos); |
| if (dev) |
| return dev; |
| |
| bucket = get_bucket(*pos) + 1; |
| *pos = set_bucket_offset(bucket, 1); |
| } while (bucket < NETDEV_HASHENTRIES); |
| |
| return NULL; |
| } |
| |
| /* |
| * This is invoked by the /proc filesystem handler to display a device |
| * in detail. |
| */ |
| static void *dev_seq_start(struct seq_file *seq, loff_t *pos) |
| __acquires(RCU) |
| { |
| rcu_read_lock(); |
| if (!*pos) |
| return SEQ_START_TOKEN; |
| |
| if (get_bucket(*pos) >= NETDEV_HASHENTRIES) |
| return NULL; |
| |
| return dev_from_bucket(seq, pos); |
| } |
| |
| static void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| { |
| ++*pos; |
| return dev_from_bucket(seq, pos); |
| } |
| |
| static void dev_seq_stop(struct seq_file *seq, void *v) |
| __releases(RCU) |
| { |
| rcu_read_unlock(); |
| } |
| |
| static void dev_seq_printf_stats(struct seq_file *seq, struct net_device *dev) |
| { |
| struct rtnl_link_stats64 temp; |
| const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); |
| |
| seq_printf(seq, "%6s: %7llu %7llu %4llu %4llu %4llu %5llu %10llu %9llu " |
| "%8llu %7llu %4llu %4llu %4llu %5llu %7llu %10llu\n", |
| dev->name, stats->rx_bytes, stats->rx_packets, |
| stats->rx_errors, |
| stats->rx_dropped + stats->rx_missed_errors, |
| stats->rx_fifo_errors, |
| stats->rx_length_errors + stats->rx_over_errors + |
| stats->rx_crc_errors + stats->rx_frame_errors, |
| stats->rx_compressed, stats->multicast, |
| stats->tx_bytes, stats->tx_packets, |
| stats->tx_errors, stats->tx_dropped, |
| stats->tx_fifo_errors, stats->collisions, |
| stats->tx_carrier_errors + |
| stats->tx_aborted_errors + |
| stats->tx_window_errors + |
| stats->tx_heartbeat_errors, |
| stats->tx_compressed); |
| } |
| |
| /* |
| * Called from the PROCfs module. This now uses the new arbitrary sized |
| * /proc/net interface to create /proc/net/dev |
| */ |
| static int dev_seq_show(struct seq_file *seq, void *v) |
| { |
| if (v == SEQ_START_TOKEN) |
| seq_puts(seq, "Inter-| Receive " |
| " | Transmit\n" |
| " face |bytes packets errs drop fifo frame " |
| "compressed multicast|bytes packets errs " |
| "drop fifo colls carrier compressed\n"); |
| else |
| dev_seq_printf_stats(seq, v); |
| return 0; |
| } |
| |
| static struct softnet_data *softnet_get_online(loff_t *pos) |
| { |
| struct softnet_data *sd = NULL; |
| |
| while (*pos < nr_cpu_ids) |
| if (cpu_online(*pos)) { |
| sd = &per_cpu(softnet_data, *pos); |
| break; |
| } else |
| ++*pos; |
| return sd; |
| } |
| |
| static void *softnet_seq_start(struct seq_file *seq, loff_t *pos) |
| { |
| return softnet_get_online(pos); |
| } |
| |
| static void *softnet_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| { |
| ++*pos; |
| return softnet_get_online(pos); |
| } |
| |
| static void softnet_seq_stop(struct seq_file *seq, void *v) |
| { |
| } |
| |
| static int softnet_seq_show(struct seq_file *seq, void *v) |
| { |
| struct softnet_data *sd = v; |
| unsigned int flow_limit_count = 0; |
| |
| #ifdef CONFIG_NET_FLOW_LIMIT |
| struct sd_flow_limit *fl; |
| |
| rcu_read_lock(); |
| fl = rcu_dereference(sd->flow_limit); |
| if (fl) |
| flow_limit_count = fl->count; |
| rcu_read_unlock(); |
| #endif |
| |
| seq_printf(seq, |
| "%08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x\n", |
| sd->processed, sd->dropped, sd->time_squeeze, 0, |
| 0, 0, 0, 0, /* was fastroute */ |
| 0, /* was cpu_collision */ |
| sd->received_rps, flow_limit_count); |
| return 0; |
| } |
| |
| static const struct seq_operations dev_seq_ops = { |
| .start = dev_seq_start, |
| .next = dev_seq_next, |
| .stop = dev_seq_stop, |
| .show = dev_seq_show, |
| }; |
| |
| static int dev_seq_open(struct inode *inode, struct file *file) |
| { |
| return seq_open_net(inode, file, &dev_seq_ops, |
| sizeof(struct seq_net_private)); |
| } |
| |
| static const struct file_operations dev_seq_fops = { |
| .open = dev_seq_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = seq_release_net, |
| }; |
| |
| static const struct seq_operations softnet_seq_ops = { |
| .start = softnet_seq_start, |
| .next = softnet_seq_next, |
| .stop = softnet_seq_stop, |
| .show = softnet_seq_show, |
| }; |
| |
| static int softnet_seq_open(struct inode *inode, struct file *file) |
| { |
| return seq_open(file, &softnet_seq_ops); |
| } |
| |
| static const struct file_operations softnet_seq_fops = { |
| .open = softnet_seq_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = seq_release, |
| }; |
| |
| static void *ptype_get_idx(loff_t pos) |
| { |
| struct packet_type *pt = NULL; |
| loff_t i = 0; |
| int t; |
| |
| list_for_each_entry_rcu(pt, &ptype_all, list) { |
| if (i == pos) |
| return pt; |
| ++i; |
| } |
| |
| for (t = 0; t < PTYPE_HASH_SIZE; t++) { |
| list_for_each_entry_rcu(pt, &ptype_base[t], list) { |
| if (i == pos) |
| return pt; |
| ++i; |
| } |
| } |
| return NULL; |
| } |
| |
| static void *ptype_seq_start(struct seq_file *seq, loff_t *pos) |
| __acquires(RCU) |
| { |
| rcu_read_lock(); |
| return *pos ? ptype_get_idx(*pos - 1) : SEQ_START_TOKEN; |
| } |
| |
| static void *ptype_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| { |
| struct packet_type *pt; |
| struct list_head *nxt; |
| int hash; |
| |
| ++*pos; |
| if (v == SEQ_START_TOKEN) |
| return ptype_get_idx(0); |
| |
| pt = v; |
| nxt = pt->list.next; |
| if (pt->type == htons(ETH_P_ALL)) { |
| if (nxt != &ptype_all) |
| goto found; |
| hash = 0; |
| nxt = ptype_base[0].next; |
| } else |
| hash = ntohs(pt->type) & PTYPE_HASH_MASK; |
| |
| while (nxt == &ptype_base[hash]) { |
| if (++hash >= PTYPE_HASH_SIZE) |
| return NULL; |
| nxt = ptype_base[hash].next; |
| } |
| found: |
| return list_entry(nxt, struct packet_type, list); |
| } |
| |
| static void ptype_seq_stop(struct seq_file *seq, void *v) |
| __releases(RCU) |
| { |
| rcu_read_unlock(); |
| } |
| |
| static int ptype_seq_show(struct seq_file *seq, void *v) |
| { |
| struct packet_type *pt = v; |
| |
| if (v == SEQ_START_TOKEN) |
| seq_puts(seq, "Type Device Function\n"); |
| else if (pt->dev == NULL || dev_net(pt->dev) == seq_file_net(seq)) { |
| if (pt->type == htons(ETH_P_ALL)) |
| seq_puts(seq, "ALL "); |
| else |
| seq_printf(seq, "%04x", ntohs(pt->type)); |
| |
| seq_printf(seq, " %-8s %pf\n", |
| pt->dev ? pt->dev->name : "", pt->func); |
| } |
| |
| return 0; |
| } |
| |
| static const struct seq_operations ptype_seq_ops = { |
| .start = ptype_seq_start, |
| .next = ptype_seq_next, |
| .stop = ptype_seq_stop, |
| .show = ptype_seq_show, |
| }; |
| |
| static int ptype_seq_open(struct inode *inode, struct file *file) |
| { |
| return seq_open_net(inode, file, &ptype_seq_ops, |
| sizeof(struct seq_net_private)); |
| } |
| |
| static const struct file_operations ptype_seq_fops = { |
| .open = ptype_seq_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = seq_release_net, |
| }; |
| |
| |
| static int __net_init dev_proc_net_init(struct net *net) |
| { |
| int rc = -ENOMEM; |
| |
| if (!proc_create("dev", 0444, net->proc_net, &dev_seq_fops)) |
| goto out; |
| if (!proc_create("softnet_stat", 0444, net->proc_net, |
| &softnet_seq_fops)) |
| goto out_dev; |
| if (!proc_create("ptype", 0444, net->proc_net, &ptype_seq_fops)) |
| goto out_softnet; |
| |
| if (wext_proc_init(net)) |
| goto out_ptype; |
| rc = 0; |
| out: |
| return rc; |
| out_ptype: |
| remove_proc_entry("ptype", net->proc_net); |
| out_softnet: |
| remove_proc_entry("softnet_stat", net->proc_net); |
| out_dev: |
| remove_proc_entry("dev", net->proc_net); |
| goto out; |
| } |
| |
| static void __net_exit dev_proc_net_exit(struct net *net) |
| { |
| wext_proc_exit(net); |
| |
| remove_proc_entry("ptype", net->proc_net); |
| remove_proc_entry("softnet_stat", net->proc_net); |
| remove_proc_entry("dev", net->proc_net); |
| } |
| |
| static struct pernet_operations __net_initdata dev_proc_ops = { |
| .init = dev_proc_net_init, |
| .exit = dev_proc_net_exit, |
| }; |
| |
| static int dev_mc_seq_show(struct seq_file *seq, void *v) |
| { |
| struct netdev_hw_addr *ha; |
| struct net_device *dev = v; |
| |
| if (v == SEQ_START_TOKEN) |
| return 0; |
| |
| netif_addr_lock_bh(dev); |
| netdev_for_each_mc_addr(ha, dev) { |
| seq_printf(seq, "%-4d %-15s %-5d %-5d %*phN\n", |
| dev->ifindex, dev->name, |
| ha->refcount, ha->global_use, |
| (int)dev->addr_len, ha->addr); |
| } |
| netif_addr_unlock_bh(dev); |
| return 0; |
| } |
| |
| static const struct seq_operations dev_mc_seq_ops = { |
| .start = dev_seq_start, |
| .next = dev_seq_next, |
| .stop = dev_seq_stop, |
| .show = dev_mc_seq_show, |
| }; |
| |
| static int dev_mc_seq_open(struct inode *inode, struct file *file) |
| { |
| return seq_open_net(inode, file, &dev_mc_seq_ops, |
| sizeof(struct seq_net_private)); |
| } |
| |
| static const struct file_operations dev_mc_seq_fops = { |
| .open = dev_mc_seq_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = seq_release_net, |
| }; |
| |
| static int __net_init dev_mc_net_init(struct net *net) |
| { |
| if (!proc_create("dev_mcast", 0, net->proc_net, &dev_mc_seq_fops)) |
| return -ENOMEM; |
| return 0; |
| } |
| |
| static void __net_exit dev_mc_net_exit(struct net *net) |
| { |
| remove_proc_entry("dev_mcast", net->proc_net); |
| } |
| |
| static struct pernet_operations __net_initdata dev_mc_net_ops = { |
| .init = dev_mc_net_init, |
| .exit = dev_mc_net_exit, |
| }; |
| |
| int __init dev_proc_init(void) |
| { |
| int ret = register_pernet_subsys(&dev_proc_ops); |
| if (!ret) |
| return register_pernet_subsys(&dev_mc_net_ops); |
| return ret; |
| } |