cregit-Linux how code gets into the kernel

Release 4.15 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) { return &current->nsproxy->net_ns->sysctls; }

Contributors

PersonTokensPropCommitsCommitProp
Eric W. Biedermann1982.61%266.67%
Al Viro417.39%133.33%
Total23100.00%3100.00%


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

Contributors

PersonTokensPropCommitsCommitProp
Al Viro2191.30%150.00%
Eric W. Biedermann28.70%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); /* Allow network administrator to have same access as root. */ if (ns_capable_noaudit(net->user_ns, CAP_NET_ADMIN)) { int mode = (table->mode >> 6) & 7; return (mode << 6) | (mode << 3) | mode; } return table->mode; }

Contributors

PersonTokensPropCommitsCommitProp
Stephen Hemminger5062.50%120.00%
Eric W. Biedermann2835.00%240.00%
Dmitry Torokhov11.25%120.00%
Tyler Hicks11.25%120.00%
Total80100.00%5100.00%


static void net_ctl_set_ownership(struct ctl_table_header *head, struct ctl_table *table, kuid_t *uid, kgid_t *gid) { struct net *net = container_of(head->set, struct net, sysctls); kuid_t ns_root_uid; kgid_t ns_root_gid; ns_root_uid = make_kuid(net->user_ns, 0); if (uid_valid(ns_root_uid)) *uid = ns_root_uid; ns_root_gid = make_kgid(net->user_ns, 0); if (gid_valid(ns_root_gid)) *gid = ns_root_gid; }

Contributors

PersonTokensPropCommitsCommitProp
Dmitry Torokhov9096.77%150.00%
Stephen Hemminger33.23%150.00%
Total93100.00%2100.00%

static struct ctl_table_root net_sysctl_root = { .lookup = net_ctl_header_lookup, .permissions = net_ctl_permissions, .set_ownership = net_ctl_set_ownership, };
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. Biedermann2382.14%250.00%
Al Viro414.29%125.00%
Alexey 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. Biedermann1890.00%250.00%
Alexey Dobriyan15.00%125.00%
Al 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; out: return ret; out1: unregister_sysctl_table(net_header); net_header = NULL; goto out; }

Contributors

PersonTokensPropCommitsCommitProp
Eric W. Biedermann5979.73%375.00%
Li RongQing1520.27%125.00%
Total74100.00%4100.00%


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. Biedermann35100.00%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. Biedermann1493.33%150.00%
Harvey Harrison16.67%150.00%
Total15100.00%2100.00%

EXPORT_SYMBOL_GPL(unregister_net_sysctl_table);

Overall Contributors

PersonTokensPropCommitsCommitProp
Eric W. Biedermann24651.36%939.13%
Dmitry Torokhov9620.04%14.35%
Stephen Hemminger5912.32%14.35%
Al Viro306.26%14.35%
Linus Torvalds (pre-git)163.34%313.04%
Li RongQing153.13%14.35%
Arnaldo Carvalho de Melo61.25%14.35%
Paul Gortmaker30.63%14.35%
Russell King30.63%14.35%
Alexey Dobriyan20.42%14.35%
Adrian Bunk10.21%14.35%
Tyler Hicks10.21%14.35%
Harvey Harrison10.21%14.35%
Total479100.00%23100.00%
Directory: net
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