net: move procfs code to net/core/net-procfs.c

Similar to net/core/net-sysfs.c, group procfs code to
a single unit.

Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 414 insertions, 0 deletions

diff --git a/net/core/net-procfs.c b/net/core/net-procfs.c
new file mode 100644
index 000000000000..ac87066491e9
--- /dev/null
+++ b/net/core/net-procfs.c
@@ -0,0 +1,414 @@
+#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_node *p;
+        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, p, 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;
+
+        seq_printf(seq, "%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 */
+                   sd->cpu_collision, sd->received_rps);
+        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 = {
+        .owner   = THIS_MODULE,
+        .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 = {
+        .owner   = THIS_MODULE,
+        .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 = {
+        .owner   = THIS_MODULE,
+        .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", S_IRUGO, net->proc_net, &dev_seq_fops))
+                goto out;
+        if (!proc_create("softnet_stat", S_IRUGO, net->proc_net,
+                         &softnet_seq_fops))
+                goto out_dev;
+        if (!proc_create("ptype", S_IRUGO, 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,
+};
+
+int __init dev_proc_init(void)
+{
+        return register_pernet_subsys(&dev_proc_ops);
+}
+
+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) {
+                int i;
+
+                seq_printf(seq, "%-4d %-15s %-5d %-5d ", dev->ifindex,
+                           dev->name, ha->refcount, ha->global_use);
+
+                for (i = 0; i < dev->addr_len; i++)
+                        seq_printf(seq, "%02x", ha->addr[i]);
+
+                seq_putc(seq, '\n');
+        }
+        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 = {
+        .owner   = THIS_MODULE,
+        .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,
+};
+
+void __init dev_mcast_init(void)
+{
+        register_pernet_subsys(&dev_mc_net_ops);
+}