cregit-Linux how code gets into the kernel

Release 4.8 net/8021q/vlanproc.c

Directory: net/8021q
 * vlanproc.c   VLAN Module. /proc filesystem interface.
 *              This module is completely hardware-independent and provides
 *              access to the router using Linux /proc filesystem.
 * Author:      Ben Greear, <> coppied from wanproc.c
 *               by: Gene Kozin <>
 * Copyright:   (c) 1998 Ben Greear
 *              This program is free software; you can redistribute it and/or
 *              modify it under the terms of the GNU General Public License
 *              as published by the Free Software Foundation; either version
 *              2 of the License, or (at your option) any later version.
 * ============================================================================
 * Jan 20, 1998        Ben Greear     Initial Version

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/fs.h>
#include <linux/netdevice.h>
#include <linux/if_vlan.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
#include "vlanproc.h"
#include "vlan.h"

/****** Function Prototypes *************************************************/

/* Methods for preparing data for reading proc entries */
static int vlan_seq_show(struct seq_file *seq, void *v);
static void *vlan_seq_start(struct seq_file *seq, loff_t *pos);
static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos);
static void vlan_seq_stop(struct seq_file *seq, void *);
static int vlandev_seq_show(struct seq_file *seq, void *v);

 *      Global Data

 *      Names of the proc directory entries

static const char name_root[]	 = "vlan";

static const char name_conf[]	 = "config";

 *      Structures for interfacing with the /proc filesystem.
 *      VLAN creates its own directory /proc/net/vlan with the following
 *      entries:
 *      config          device status/configuration
 *      <device>        entry for each  device

 *      Generic /proc/net/vlan/<file> file and inode operations

static const struct seq_operations vlan_seq_ops = {
	.start = vlan_seq_start,
	.next = vlan_seq_next,
	.stop = vlan_seq_stop,
	.show = vlan_seq_show,

static int vlan_seq_open(struct inode *inode, struct file *file) { return seq_open_net(inode, file, &vlan_seq_ops, sizeof(struct seq_net_private)); }


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pavel emelianovpavel emelianov927.27%150.00%

static const struct file_operations vlan_fops = { .owner = THIS_MODULE, .open = vlan_seq_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release_net, }; /* * /proc/net/vlan/<device> file and inode operations */
static int vlandev_seq_open(struct inode *inode, struct file *file) { return single_open(file, vlandev_seq_show, PDE_DATA(inode)); }


stephen hemmingerstephen hemminger2896.55%150.00%
al viroal viro13.45%150.00%

static const struct file_operations vlandev_fops = { .owner = THIS_MODULE, .open = vlandev_seq_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; /* * Proc filesystem directory entries. */ /* Strings */ static const char *const vlan_name_type_str[VLAN_NAME_TYPE_HIGHEST] = { [VLAN_NAME_TYPE_RAW_PLUS_VID] = "VLAN_NAME_TYPE_RAW_PLUS_VID", [VLAN_NAME_TYPE_PLUS_VID_NO_PAD] = "VLAN_NAME_TYPE_PLUS_VID_NO_PAD", [VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD] = "VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD", [VLAN_NAME_TYPE_PLUS_VID] = "VLAN_NAME_TYPE_PLUS_VID", }; /* * Interface functions */ /* * Clean up /proc/net/vlan entries */
void vlan_proc_cleanup(struct net *net) { struct vlan_net *vn = net_generic(net, vlan_net_id); if (vn->proc_vlan_conf) remove_proc_entry(name_conf, vn->proc_vlan_dir); if (vn->proc_vlan_dir) remove_proc_entry(name_root, net->proc_net); /* Dynamically added entries should be cleaned up as their vlan_device * is removed, so we should not have to take care of it here... */ }


pavel emelianovpavel emelianov2445.28%250.00%
linus torvaldslinus torvalds2445.28%125.00%
gao fenggao feng59.43%125.00%

/* * Create /proc/net/vlan entries */
int __net_init vlan_proc_init(struct net *net) { struct vlan_net *vn = net_generic(net, vlan_net_id); vn->proc_vlan_dir = proc_net_mkdir(net, name_root, net->proc_net); if (!vn->proc_vlan_dir) goto err; vn->proc_vlan_conf = proc_create(name_conf, S_IFREG|S_IRUSR|S_IWUSR, vn->proc_vlan_dir, &vlan_fops); if (!vn->proc_vlan_conf) goto err; return 0; err: pr_err("can't create entry in proc filesystem!\n"); vlan_proc_cleanup(net); return -ENOBUFS; }


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pavel emelianovpavel emelianov3434.34%228.57%
patrick mchardypatrick mchardy1414.14%114.29%
wang chenwang chen44.04%114.29%
joe perchesjoe perches11.01%114.29%
alexey dobriyanalexey dobriyan11.01%114.29%

/* * Add directory entry for VLAN device. */
int vlan_proc_add_dev(struct net_device *vlandev) { struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id); if (!strcmp(vlandev->name, name_conf)) return -EINVAL; vlan->dent = proc_create_data(vlandev->name, S_IFREG|S_IRUSR|S_IWUSR, vn->proc_vlan_dir, &vlandev_fops, vlandev); if (!vlan->dent) return -ENOBUFS; return 0; }


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pavel emelianovpavel emelianov1718.68%116.67%
americo wangamerico wang1617.58%116.67%
jiri pirkojiri pirko55.49%116.67%
denis v. lunevdenis v. lunev33.30%116.67%
wang chenwang chen33.30%116.67%

/* * Delete directory entry for VLAN device. */
void vlan_proc_rem_dev(struct net_device *vlandev) { /** NOTE: This will consume the memory pointed to by dent, it seems. */ proc_remove(vlan_dev_priv(vlandev)->dent); vlan_dev_priv(vlandev)->dent = NULL; }


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jiri pirkojiri pirko26.67%125.00%
david howellsdavid howells13.33%125.00%
zhang shengjuzhang shengju13.33%125.00%

/****** Proc filesystem entry points ****************************************/ /* * The following few functions build the content of /proc/net/vlan/config */ /* start read of /proc/net/vlan/config */
static void *vlan_seq_start(struct seq_file *seq, loff_t *pos) __acquires (rcu) { struct net_device *dev; struct net *net = seq_file_net(seq); loff_t i = 1; rcu_read_lock(); if (*pos == 0) return SEQ_START_TOKEN; for_each_netdev_rcu(net, dev) { if (!is_vlan_dev(dev)) continue; if (i++ == *pos) return dev; } return NULL; }


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pavel emelianovpavel emelianov2732.14%228.57%
linus torvaldslinus torvalds2226.19%114.29%
eric w. biedermaneric w. biederman11.19%114.29%

static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos) { struct net_device *dev; struct net *net = seq_file_net(seq); ++*pos; dev = v; if (v == SEQ_START_TOKEN) dev = net_device_entry(&net->dev_base_head); for_each_netdev_continue_rcu(net, dev) { if (!is_vlan_dev(dev)) continue; return dev; } return NULL; }


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stephen hemmingerstephen hemminger2226.83%228.57%
linus torvaldslinus torvalds44.88%114.29%
oleg drokinoleg drokin22.44%114.29%
eric w. biedermaneric w. biederman11.22%114.29%

static void vlan_seq_stop(struct seq_file *seq, void *v) __releases (rcu) { rcu_read_unlock(); }


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linus torvaldslinus torvalds313.64%125.00%

static int vlan_seq_show(struct seq_file *seq, void *v) { struct net *net = seq_file_net(seq); struct vlan_net *vn = net_generic(net, vlan_net_id); if (v == SEQ_START_TOKEN) { const char *nmtype = NULL; seq_puts(seq, "VLAN Dev name | VLAN ID\n"); if (vn->name_type < ARRAY_SIZE(vlan_name_type_str)) nmtype = vlan_name_type_str[vn->name_type]; seq_printf(seq, "Name-Type: %s\n", nmtype ? nmtype : "UNKNOWN"); } else { const struct net_device *vlandev = v; const struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); seq_printf(seq, "%-15s| %d | %s\n", vlandev->name, vlan->vlan_id, vlan->real_dev->name); } return 0; }


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stephen hemmingerstephen hemminger5136.96%120.00%
pavel emelianovpavel emelianov2820.29%120.00%
jiri pirkojiri pirko53.62%120.00%
david s. millerdavid s. miller10.72%120.00%

static int vlandev_seq_show(struct seq_file *seq, void *offset) { struct net_device *vlandev = (struct net_device *) seq->private; const struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); struct rtnl_link_stats64 temp; const struct rtnl_link_stats64 *stats; static const char fmt64[] = "%30s %12llu\n"; int i; if (!is_vlan_dev(vlandev)) return 0; stats = dev_get_stats(vlandev, &temp); seq_printf(seq, "%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n", vlandev->name, vlan->vlan_id, (int)(vlan->flags & 1), vlandev->priv_flags); seq_printf(seq, fmt64, "total frames received", stats->rx_packets); seq_printf(seq, fmt64, "total bytes received", stats->rx_bytes); seq_printf(seq, fmt64, "Broadcast/Multicast Rcvd", stats->multicast); seq_puts(seq, "\n"); seq_printf(seq, fmt64, "total frames transmitted", stats->tx_packets); seq_printf(seq, fmt64, "total bytes transmitted", stats->tx_bytes); seq_printf(seq, "Device: %s", vlan->real_dev->name); /* now show all PRIORITY mappings relating to this VLAN */ seq_printf(seq, "\nINGRESS priority mappings: " "0:%u 1:%u 2:%u 3:%u 4:%u 5:%u 6:%u 7:%u\n", vlan->ingress_priority_map[0], vlan->ingress_priority_map[1], vlan->ingress_priority_map[2], vlan->ingress_priority_map[3], vlan->ingress_priority_map[4], vlan->ingress_priority_map[5], vlan->ingress_priority_map[6], vlan->ingress_priority_map[7]); seq_printf(seq, " EGRESS priority mappings: "); for (i = 0; i < 16; i++) { const struct vlan_priority_tci_mapping *mp = vlan->egress_priority_map[i]; while (mp) { seq_printf(seq, "%u:%hu ", mp->priority, ((mp->vlan_qos >> 13) & 0x7)); mp = mp->next; } } seq_puts(seq, "\n"); return 0; }


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stephen hemmingerstephen hemminger5516.08%110.00%
eric dumazeteric dumazet154.39%220.00%
jiri pirkojiri pirko154.39%110.00%
ben hutchingsben hutchings113.22%110.00%
joonwoo parkjoonwoo park30.88%110.00%
patrick mchardypatrick mchardy30.88%220.00%
wagner ferencwagner ferenc10.29%110.00%

Overall Contributors

linus torvaldslinus torvalds56744.02%12.50%
stephen hemmingerstephen hemminger37128.80%37.50%
pavel emelianovpavel emelianov19615.22%512.50%
jiri pirkojiri pirko272.10%12.50%
patrick mchardypatrick mchardy171.32%37.50%
americo wangamerico wang161.24%12.50%
eric dumazeteric dumazet151.16%25.00%
hideaki yoshifujihideaki yoshifuji120.93%25.00%
ben hutchingsben hutchings110.85%12.50%
rusty russellrusty russell80.62%12.50%
joe perchesjoe perches80.62%12.50%
wang chenwang chen70.54%12.50%
eric w. biedermaneric w. biederman50.39%25.00%
gao fenggao feng50.39%12.50%
david s. millerdavid s. miller40.31%25.00%
denis v. lunevdenis v. lunev30.23%12.50%
joonwoo parkjoonwoo park30.23%12.50%
arjan van de venarjan van de ven20.16%12.50%
oleg drokinoleg drokin20.16%12.50%
anatol pomozovanatol pomozov10.08%12.50%
lucas de marchilucas de marchi10.08%12.50%
alexey dobriyanalexey dobriyan10.08%12.50%
david howellsdavid howells10.08%12.50%
zhang shengjuzhang shengju10.08%12.50%
wagner ferencwagner ferenc10.08%12.50%
al viroal viro10.08%12.50%
jan engelhardtjan engelhardt10.08%12.50%
philippe de muyterphilippe de muyter10.08%12.50%
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