cregit-Linux how code gets into the kernel

Release 4.8 net/sysctl_net.c

Directory: net
/* -*- linux-c -*-
 * sysctl_net.c: sysctl interface to net subsystem.
 *
 * Begun April 1, 1996, Mike Shaver.
 * Added /proc/sys/net directories for each protocol family. [MS]
 *
 * Revision 1.2  1996/05/08  20:24:40  shaver
 * Added bits for NET_BRIDGE and the NET_IPV4_ARP stuff and
 * NET_IPV4_IP_FORWARD.
 *
 *
 */

#include <linux/mm.h>
#include <linux/export.h>
#include <linux/sysctl.h>
#include <linux/nsproxy.h>

#include <net/sock.h>

#ifdef CONFIG_INET
#include <net/ip.h>
#endif

#ifdef CONFIG_NET
#include <linux/if_ether.h>
#endif


static struct ctl_table_set * net_ctl_header_lookup(struct ctl_table_root *root, struct nsproxy *namespaces) { return &namespaces->net_ns->sysctls; }

Contributors

PersonTokensPropCommitsCommitProp
eric w. biedermaneric w. biederman2284.62%150.00%
al viroal viro415.38%150.00%
Total26100.00%2100.00%


static int is_seen(struct ctl_table_set *set) { return &current->nsproxy->net_ns->sysctls == set; }

Contributors

PersonTokensPropCommitsCommitProp
al viroal viro2191.30%150.00%
eric w. biedermaneric w. biederman28.70%150.00%
Total23100.00%2100.00%

/* Return standard mode bits for table entry. */
static int net_ctl_permissions(struct ctl_table_header *head, struct ctl_table *table) { struct net *net = container_of(head->set, struct net, sysctls); kuid_t root_uid = make_kuid(net->user_ns, 0); kgid_t root_gid = make_kgid(net->user_ns, 0); /* Allow network administrator to have same access as root. */ if (ns_capable_noaudit(net->user_ns, CAP_NET_ADMIN) || uid_eq(root_uid, current_euid())) { int mode = (table->mode >> 6) & 7; return (mode << 6) | (mode << 3) | mode; } /* Allow netns root group to have the same access as the root group */ if (in_egroup_p(root_gid)) { int mode = (table->mode >> 3) & 7; return (mode << 3) | mode; } return table->mode; }

Contributors

PersonTokensPropCommitsCommitProp
eric w. biedermaneric w. biederman8659.72%350.00%
stephen hemmingerstephen hemminger5638.89%116.67%
tyler hickstyler hicks10.69%116.67%
zhao hongjiangzhao hongjiang10.69%116.67%
Total144100.00%6100.00%

static struct ctl_table_root net_sysctl_root = { .lookup = net_ctl_header_lookup, .permissions = net_ctl_permissions, };
static int __net_init sysctl_net_init(struct net *net) { setup_sysctl_set(&net->sysctls, &net_sysctl_root, is_seen); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
eric w. biedermaneric w. biederman2382.14%250.00%
al viroal viro414.29%125.00%
alexey dobriyanalexey dobriyan13.57%125.00%
Total28100.00%4100.00%


static void __net_exit sysctl_net_exit(struct net *net) { retire_sysctl_set(&net->sysctls); }

Contributors

PersonTokensPropCommitsCommitProp
eric w. biedermaneric w. biederman1890.00%250.00%
alexey dobriyanalexey dobriyan15.00%125.00%
al viroal viro15.00%125.00%
Total20100.00%4100.00%

static struct pernet_operations sysctl_pernet_ops = { .init = sysctl_net_init, .exit = sysctl_net_exit, }; static struct ctl_table_header *net_header;
__init int net_sysctl_init(void) { static struct ctl_table empty[1]; int ret = -ENOMEM; /* Avoid limitations in the sysctl implementation by * registering "/proc/sys/net" as an empty directory not in a * network namespace. */ net_header = register_sysctl("net", empty); if (!net_header) goto out; ret = register_pernet_subsys(&sysctl_pernet_ops); if (ret) goto out1; register_sysctl_root(&net_sysctl_root); out: return ret; out1: unregister_sysctl_table(net_header); net_header = NULL; goto out; }

Contributors

PersonTokensPropCommitsCommitProp
eric w. biedermaneric w. biederman6581.25%480.00%
li rongqingli rongqing1518.75%120.00%
Total80100.00%5100.00%


struct ctl_table_header *register_net_sysctl(struct net *net, const char *path, struct ctl_table *table) { return __register_sysctl_table(&net->sysctls, path, table); }

Contributors

PersonTokensPropCommitsCommitProp
eric w. biedermaneric w. biederman35100.00%1100.00%
Total35100.00%1100.00%

EXPORT_SYMBOL_GPL(register_net_sysctl);
void unregister_net_sysctl_table(struct ctl_table_header *header) { unregister_sysctl_table(header); }

Contributors

PersonTokensPropCommitsCommitProp
eric w. biedermaneric w. biederman1493.33%150.00%
harvey harrisonharvey harrison16.67%150.00%
Total15100.00%2100.00%

EXPORT_SYMBOL_GPL(unregister_net_sysctl_table);

Overall Contributors

PersonTokensPropCommitsCommitProp
eric w. biedermaneric w. biederman31368.94%1041.67%
stephen hemmingerstephen hemminger6213.66%14.17%
al viroal viro306.61%14.17%
pre-gitpre-git163.52%312.50%
li rongqingli rongqing153.30%14.17%
arnaldo carvalho de meloarnaldo carvalho de melo61.32%14.17%
russell kingrussell king30.66%14.17%
paul gortmakerpaul gortmaker30.66%14.17%
alexey dobriyanalexey dobriyan20.44%14.17%
adrian bunkadrian bunk10.22%14.17%
harvey harrisonharvey harrison10.22%14.17%
tyler hickstyler hicks10.22%14.17%
zhao hongjiangzhao hongjiang10.22%14.17%
Total454100.00%24100.00%
Directory: net
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