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378 lines
8.8 KiB
378 lines
8.8 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/netdevice.h> |
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#include <linux/proc_fs.h> |
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#include <linux/seq_file.h> |
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#include <net/wext.h> |
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#define BUCKET_SPACE (32 - NETDEV_HASHBITS - 1) |
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#define get_bucket(x) ((x) >> BUCKET_SPACE) |
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#define get_offset(x) ((x) & ((1 << BUCKET_SPACE) - 1)) |
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#define set_bucket_offset(b, o) ((b) << BUCKET_SPACE | (o)) |
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extern struct list_head ptype_all __read_mostly; |
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extern struct list_head ptype_base[PTYPE_HASH_SIZE] __read_mostly; |
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static inline struct net_device *dev_from_same_bucket(struct seq_file *seq, loff_t *pos) |
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{ |
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struct net *net = seq_file_net(seq); |
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struct net_device *dev; |
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struct hlist_head *h; |
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unsigned int count = 0, offset = get_offset(*pos); |
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h = &net->dev_index_head[get_bucket(*pos)]; |
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hlist_for_each_entry_rcu(dev, h, index_hlist) { |
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if (++count == offset) |
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return dev; |
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} |
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return NULL; |
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} |
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static inline struct net_device *dev_from_bucket(struct seq_file *seq, loff_t *pos) |
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{ |
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struct net_device *dev; |
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unsigned int bucket; |
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do { |
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dev = dev_from_same_bucket(seq, pos); |
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if (dev) |
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return dev; |
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bucket = get_bucket(*pos) + 1; |
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*pos = set_bucket_offset(bucket, 1); |
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} while (bucket < NETDEV_HASHENTRIES); |
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return NULL; |
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} |
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/* |
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* This is invoked by the /proc filesystem handler to display a device |
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* in detail. |
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*/ |
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static void *dev_seq_start(struct seq_file *seq, loff_t *pos) |
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__acquires(RCU) |
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{ |
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rcu_read_lock(); |
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if (!*pos) |
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return SEQ_START_TOKEN; |
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if (get_bucket(*pos) >= NETDEV_HASHENTRIES) |
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return NULL; |
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return dev_from_bucket(seq, pos); |
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} |
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static void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
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{ |
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++*pos; |
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return dev_from_bucket(seq, pos); |
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} |
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static void dev_seq_stop(struct seq_file *seq, void *v) |
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__releases(RCU) |
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{ |
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rcu_read_unlock(); |
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} |
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static void dev_seq_printf_stats(struct seq_file *seq, struct net_device *dev) |
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{ |
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struct rtnl_link_stats64 temp; |
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const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); |
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seq_printf(seq, "%6s: %7llu %7llu %4llu %4llu %4llu %5llu %10llu %9llu " |
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"%8llu %7llu %4llu %4llu %4llu %5llu %7llu %10llu\n", |
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dev->name, stats->rx_bytes, stats->rx_packets, |
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stats->rx_errors, |
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stats->rx_dropped + stats->rx_missed_errors, |
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stats->rx_fifo_errors, |
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stats->rx_length_errors + stats->rx_over_errors + |
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stats->rx_crc_errors + stats->rx_frame_errors, |
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stats->rx_compressed, stats->multicast, |
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stats->tx_bytes, stats->tx_packets, |
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stats->tx_errors, stats->tx_dropped, |
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stats->tx_fifo_errors, stats->collisions, |
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stats->tx_carrier_errors + |
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stats->tx_aborted_errors + |
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stats->tx_window_errors + |
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stats->tx_heartbeat_errors, |
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stats->tx_compressed); |
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} |
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/* |
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* Called from the PROCfs module. This now uses the new arbitrary sized |
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* /proc/net interface to create /proc/net/dev |
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*/ |
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static int dev_seq_show(struct seq_file *seq, void *v) |
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{ |
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if (v == SEQ_START_TOKEN) |
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seq_puts(seq, "Inter-| Receive " |
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" | Transmit\n" |
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" face |bytes packets errs drop fifo frame " |
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"compressed multicast|bytes packets errs " |
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"drop fifo colls carrier compressed\n"); |
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else |
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dev_seq_printf_stats(seq, v); |
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return 0; |
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} |
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static u32 softnet_backlog_len(struct softnet_data *sd) |
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{ |
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return skb_queue_len_lockless(&sd->input_pkt_queue) + |
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skb_queue_len_lockless(&sd->process_queue); |
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} |
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static struct softnet_data *softnet_get_online(loff_t *pos) |
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{ |
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struct softnet_data *sd = NULL; |
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while (*pos < nr_cpu_ids) |
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if (cpu_online(*pos)) { |
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sd = &per_cpu(softnet_data, *pos); |
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break; |
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} else |
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++*pos; |
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return sd; |
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} |
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static void *softnet_seq_start(struct seq_file *seq, loff_t *pos) |
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{ |
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return softnet_get_online(pos); |
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} |
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static void *softnet_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
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{ |
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++*pos; |
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return softnet_get_online(pos); |
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} |
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static void softnet_seq_stop(struct seq_file *seq, void *v) |
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{ |
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} |
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static int softnet_seq_show(struct seq_file *seq, void *v) |
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{ |
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struct softnet_data *sd = v; |
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unsigned int flow_limit_count = 0; |
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#ifdef CONFIG_NET_FLOW_LIMIT |
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struct sd_flow_limit *fl; |
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rcu_read_lock(); |
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fl = rcu_dereference(sd->flow_limit); |
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if (fl) |
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flow_limit_count = fl->count; |
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rcu_read_unlock(); |
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#endif |
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/* the index is the CPU id owing this sd. Since offline CPUs are not |
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* displayed, it would be othrwise not trivial for the user-space |
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* mapping the data a specific CPU |
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*/ |
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seq_printf(seq, |
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"%08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x\n", |
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sd->processed, sd->dropped, sd->time_squeeze, 0, |
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0, 0, 0, 0, /* was fastroute */ |
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0, /* was cpu_collision */ |
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sd->received_rps, flow_limit_count, |
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softnet_backlog_len(sd), (int)seq->index); |
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return 0; |
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} |
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static const struct seq_operations dev_seq_ops = { |
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.start = dev_seq_start, |
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.next = dev_seq_next, |
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.stop = dev_seq_stop, |
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.show = dev_seq_show, |
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}; |
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static const struct seq_operations softnet_seq_ops = { |
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.start = softnet_seq_start, |
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.next = softnet_seq_next, |
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.stop = softnet_seq_stop, |
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.show = softnet_seq_show, |
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}; |
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static void *ptype_get_idx(loff_t pos) |
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{ |
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struct packet_type *pt = NULL; |
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loff_t i = 0; |
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int t; |
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list_for_each_entry_rcu(pt, &ptype_all, list) { |
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if (i == pos) |
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return pt; |
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++i; |
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} |
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for (t = 0; t < PTYPE_HASH_SIZE; t++) { |
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list_for_each_entry_rcu(pt, &ptype_base[t], list) { |
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if (i == pos) |
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return pt; |
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++i; |
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} |
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} |
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return NULL; |
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} |
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static void *ptype_seq_start(struct seq_file *seq, loff_t *pos) |
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__acquires(RCU) |
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{ |
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rcu_read_lock(); |
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return *pos ? ptype_get_idx(*pos - 1) : SEQ_START_TOKEN; |
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} |
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static void *ptype_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
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{ |
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struct packet_type *pt; |
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struct list_head *nxt; |
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int hash; |
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++*pos; |
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if (v == SEQ_START_TOKEN) |
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return ptype_get_idx(0); |
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pt = v; |
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nxt = pt->list.next; |
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if (pt->type == htons(ETH_P_ALL)) { |
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if (nxt != &ptype_all) |
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goto found; |
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hash = 0; |
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nxt = ptype_base[0].next; |
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} else |
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hash = ntohs(pt->type) & PTYPE_HASH_MASK; |
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while (nxt == &ptype_base[hash]) { |
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if (++hash >= PTYPE_HASH_SIZE) |
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return NULL; |
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nxt = ptype_base[hash].next; |
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} |
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found: |
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return list_entry(nxt, struct packet_type, list); |
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} |
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static void ptype_seq_stop(struct seq_file *seq, void *v) |
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__releases(RCU) |
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{ |
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rcu_read_unlock(); |
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} |
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static int ptype_seq_show(struct seq_file *seq, void *v) |
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{ |
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struct packet_type *pt = v; |
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if (v == SEQ_START_TOKEN) |
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seq_puts(seq, "Type Device Function\n"); |
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else if (pt->dev == NULL || dev_net(pt->dev) == seq_file_net(seq)) { |
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if (pt->type == htons(ETH_P_ALL)) |
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seq_puts(seq, "ALL "); |
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else |
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seq_printf(seq, "%04x", ntohs(pt->type)); |
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seq_printf(seq, " %-8s %ps\n", |
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pt->dev ? pt->dev->name : "", pt->func); |
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} |
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return 0; |
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} |
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static const struct seq_operations ptype_seq_ops = { |
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.start = ptype_seq_start, |
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.next = ptype_seq_next, |
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.stop = ptype_seq_stop, |
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.show = ptype_seq_show, |
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}; |
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static int __net_init dev_proc_net_init(struct net *net) |
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{ |
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int rc = -ENOMEM; |
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if (!proc_create_net("dev", 0444, net->proc_net, &dev_seq_ops, |
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sizeof(struct seq_net_private))) |
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goto out; |
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if (!proc_create_seq("softnet_stat", 0444, net->proc_net, |
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&softnet_seq_ops)) |
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goto out_dev; |
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if (!proc_create_net("ptype", 0444, net->proc_net, &ptype_seq_ops, |
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sizeof(struct seq_net_private))) |
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goto out_softnet; |
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if (wext_proc_init(net)) |
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goto out_ptype; |
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rc = 0; |
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out: |
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return rc; |
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out_ptype: |
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remove_proc_entry("ptype", net->proc_net); |
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out_softnet: |
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remove_proc_entry("softnet_stat", net->proc_net); |
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out_dev: |
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remove_proc_entry("dev", net->proc_net); |
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goto out; |
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} |
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static void __net_exit dev_proc_net_exit(struct net *net) |
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{ |
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wext_proc_exit(net); |
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remove_proc_entry("ptype", net->proc_net); |
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remove_proc_entry("softnet_stat", net->proc_net); |
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remove_proc_entry("dev", net->proc_net); |
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} |
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static struct pernet_operations __net_initdata dev_proc_ops = { |
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.init = dev_proc_net_init, |
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.exit = dev_proc_net_exit, |
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}; |
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static int dev_mc_seq_show(struct seq_file *seq, void *v) |
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{ |
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struct netdev_hw_addr *ha; |
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struct net_device *dev = v; |
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if (v == SEQ_START_TOKEN) |
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return 0; |
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netif_addr_lock_bh(dev); |
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netdev_for_each_mc_addr(ha, dev) { |
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seq_printf(seq, "%-4d %-15s %-5d %-5d %*phN\n", |
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dev->ifindex, dev->name, |
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ha->refcount, ha->global_use, |
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(int)dev->addr_len, ha->addr); |
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} |
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netif_addr_unlock_bh(dev); |
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return 0; |
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} |
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static const struct seq_operations dev_mc_seq_ops = { |
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.start = dev_seq_start, |
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.next = dev_seq_next, |
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.stop = dev_seq_stop, |
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.show = dev_mc_seq_show, |
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}; |
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static int __net_init dev_mc_net_init(struct net *net) |
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{ |
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if (!proc_create_net("dev_mcast", 0, net->proc_net, &dev_mc_seq_ops, |
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sizeof(struct seq_net_private))) |
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return -ENOMEM; |
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return 0; |
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} |
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static void __net_exit dev_mc_net_exit(struct net *net) |
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{ |
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remove_proc_entry("dev_mcast", net->proc_net); |
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} |
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static struct pernet_operations __net_initdata dev_mc_net_ops = { |
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.init = dev_mc_net_init, |
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.exit = dev_mc_net_exit, |
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}; |
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int __init dev_proc_init(void) |
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{ |
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int ret = register_pernet_subsys(&dev_proc_ops); |
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if (!ret) |
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return register_pernet_subsys(&dev_mc_net_ops); |
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return ret; |
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}
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