cregit-Linux how code gets into the kernel

Release 4.11 net/sunrpc/sysctl.c

Directory: net/sunrpc
/*
 * linux/net/sunrpc/sysctl.c
 *
 * Sysctl interface to sunrpc module.
 *
 * I would prefer to register the sunrpc table below sys/net, but that's
 * impossible at the moment.
 */

#include <linux/types.h>
#include <linux/linkage.h>
#include <linux/ctype.h>
#include <linux/fs.h>
#include <linux/sysctl.h>
#include <linux/module.h>

#include <linux/uaccess.h>
#include <linux/sunrpc/types.h>
#include <linux/sunrpc/sched.h>
#include <linux/sunrpc/stats.h>
#include <linux/sunrpc/svc_xprt.h>

#include "netns.h"

/*
 * Declare the debug flags here
 */

unsigned int	rpc_debug;

EXPORT_SYMBOL_GPL(rpc_debug);


unsigned int	nfs_debug;

EXPORT_SYMBOL_GPL(nfs_debug);


unsigned int	nfsd_debug;

EXPORT_SYMBOL_GPL(nfsd_debug);


unsigned int	nlm_debug;

EXPORT_SYMBOL_GPL(nlm_debug);

#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)


static struct ctl_table_header *sunrpc_table_header;

static struct ctl_table sunrpc_table[];


void rpc_register_sysctl(void) { if (!sunrpc_table_header) sunrpc_table_header = register_sysctl_table(sunrpc_table); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)19100.00%2100.00%
Total19100.00%2100.00%


void rpc_unregister_sysctl(void) { if (sunrpc_table_header) { unregister_sysctl_table(sunrpc_table_header); sunrpc_table_header = NULL; } }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)22100.00%2100.00%
Total22100.00%2100.00%


static int proc_do_xprt(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { char tmpbuf[256]; size_t len; if ((*ppos && !write) || !*lenp) { *lenp = 0; return 0; } len = svc_print_xprts(tmpbuf, sizeof(tmpbuf)); return simple_read_from_buffer(buffer, *lenp, ppos, tmpbuf, len); }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker7990.80%133.33%
Cyrill V. Gorcunov78.05%133.33%
Joe Perches11.15%133.33%
Total87100.00%3100.00%


static int proc_dodebug(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { char tmpbuf[20], c, *s = NULL; char __user *p; unsigned int value; size_t left, len; if ((*ppos && !write) || !*lenp) { *lenp = 0; return 0; } left = *lenp; if (write) { if (!access_ok(VERIFY_READ, buffer, left)) return -EFAULT; p = buffer; while (left && __get_user(c, p) >= 0 && isspace(c)) left--, p++; if (!left) goto done; if (left > sizeof(tmpbuf) - 1) return -EINVAL; if (copy_from_user(tmpbuf, p, left)) return -EFAULT; tmpbuf[left] = '\0'; value = simple_strtol(tmpbuf, &s, 0); if (s) { left -= (s - tmpbuf); if (left && !isspace(*s)) return -EINVAL; while (left && isspace(*s)) left--, s++; } else left = 0; *(unsigned int *) table->data = value; /* Display the RPC tasks on writing to rpc_debug */ if (strcmp(table->procname, "rpc_debug") == 0) rpc_show_tasks(&init_net); } else { len = sprintf(tmpbuf, "0x%04x", *(unsigned int *) table->data); if (len > left) len = left; if (copy_to_user(buffer, tmpbuf, len)) return -EFAULT; if ((left -= len) > 0) { if (put_user('\n', (char __user *)buffer + len)) return -EFAULT; left--; } } done: *lenp -= left; *ppos += *lenp; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)28777.57%327.27%
Kinglong Mee267.03%19.09%
Eugene Teo215.68%19.09%
Al Viro154.05%19.09%
Linus Torvalds92.43%218.18%
J. Bruce Fields71.89%19.09%
Stanislav Kinsbursky41.08%19.09%
Joe Perches10.27%19.09%
Total370100.00%11100.00%

static struct ctl_table debug_table[] = { { .procname = "rpc_debug", .data = &rpc_debug, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dodebug }, { .procname = "nfs_debug", .data = &nfs_debug, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dodebug }, { .procname = "nfsd_debug", .data = &nfsd_debug, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dodebug }, { .procname = "nlm_debug", .data = &nlm_debug, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dodebug }, { .procname = "transports", .maxlen = 256, .mode = 0444, .proc_handler = proc_do_xprt, }, { } }; static struct ctl_table sunrpc_table[] = { { .procname = "sunrpc", .mode = 0555, .child = debug_table }, { } }; #endif

Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)41853.94%522.73%
Art Haas12816.52%14.55%
Tom Tucker10213.16%14.55%
Kinglong Mee263.35%14.55%
Eugene Teo212.71%14.55%
Trond Myklebust212.71%313.64%
Al Viro151.94%14.55%
Linus Torvalds101.29%313.64%
Cyrill V. Gorcunov70.90%14.55%
J. Bruce Fields70.90%14.55%
Stanislav Kinsbursky70.90%14.55%
Jeff Layton60.77%14.55%
Joe Perches50.65%14.55%
Eric W. Biedermann20.26%14.55%
Total775100.00%22100.00%
Directory: net/sunrpc
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