11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * linux/net/sunrpc/sysctl.c 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Sysctl interface to sunrpc module. 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * I would prefer to register the sunrpc table below sys/net, but that's 71da177e4SLinus Torvalds * impossible at the moment. 81da177e4SLinus Torvalds */ 91da177e4SLinus Torvalds 101da177e4SLinus Torvalds #include <linux/types.h> 111da177e4SLinus Torvalds #include <linux/linkage.h> 121da177e4SLinus Torvalds #include <linux/ctype.h> 131da177e4SLinus Torvalds #include <linux/fs.h> 141da177e4SLinus Torvalds #include <linux/sysctl.h> 151da177e4SLinus Torvalds #include <linux/module.h> 161da177e4SLinus Torvalds 177c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 181da177e4SLinus Torvalds #include <linux/sunrpc/types.h> 191da177e4SLinus Torvalds #include <linux/sunrpc/sched.h> 201da177e4SLinus Torvalds #include <linux/sunrpc/stats.h> 21dc9a16e4STom Tucker #include <linux/sunrpc/svc_xprt.h> 221da177e4SLinus Torvalds 2370abc49bSStanislav Kinsbursky #include "netns.h" 2470abc49bSStanislav Kinsbursky 251da177e4SLinus Torvalds /* 261da177e4SLinus Torvalds * Declare the debug flags here 271da177e4SLinus Torvalds */ 281da177e4SLinus Torvalds unsigned int rpc_debug; 29e8914c65STrond Myklebust EXPORT_SYMBOL_GPL(rpc_debug); 30a6eaf8bdSTrond Myklebust 311da177e4SLinus Torvalds unsigned int nfs_debug; 32e8914c65STrond Myklebust EXPORT_SYMBOL_GPL(nfs_debug); 33a6eaf8bdSTrond Myklebust 341da177e4SLinus Torvalds unsigned int nfsd_debug; 35e8914c65STrond Myklebust EXPORT_SYMBOL_GPL(nfsd_debug); 36a6eaf8bdSTrond Myklebust 371da177e4SLinus Torvalds unsigned int nlm_debug; 38e8914c65STrond Myklebust EXPORT_SYMBOL_GPL(nlm_debug); 391da177e4SLinus Torvalds 40f895b252SJeff Layton #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) 411da177e4SLinus Torvalds 421da177e4SLinus Torvalds static struct ctl_table_header *sunrpc_table_header; 43fe2c6338SJoe Perches static struct ctl_table sunrpc_table[]; 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds void 461da177e4SLinus Torvalds rpc_register_sysctl(void) 471da177e4SLinus Torvalds { 482b1bec5fSEric W. Biederman if (!sunrpc_table_header) 490b4d4147SEric W. Biederman sunrpc_table_header = register_sysctl_table(sunrpc_table); 501da177e4SLinus Torvalds } 511da177e4SLinus Torvalds 521da177e4SLinus Torvalds void 531da177e4SLinus Torvalds rpc_unregister_sysctl(void) 541da177e4SLinus Torvalds { 551da177e4SLinus Torvalds if (sunrpc_table_header) { 561da177e4SLinus Torvalds unregister_sysctl_table(sunrpc_table_header); 571da177e4SLinus Torvalds sunrpc_table_header = NULL; 581da177e4SLinus Torvalds } 591da177e4SLinus Torvalds } 601da177e4SLinus Torvalds 61fe2c6338SJoe Perches static int proc_do_xprt(struct ctl_table *table, int write, 62dc9a16e4STom Tucker void __user *buffer, size_t *lenp, loff_t *ppos) 63dc9a16e4STom Tucker { 64dc9a16e4STom Tucker char tmpbuf[256]; 6527df6f25SCyrill Gorcunov size_t len; 6627df6f25SCyrill Gorcunov 67dc9a16e4STom Tucker if ((*ppos && !write) || !*lenp) { 68dc9a16e4STom Tucker *lenp = 0; 69dc9a16e4STom Tucker return 0; 70dc9a16e4STom Tucker } 71dc9a16e4STom Tucker len = svc_print_xprts(tmpbuf, sizeof(tmpbuf)); 7227df6f25SCyrill Gorcunov return simple_read_from_buffer(buffer, *lenp, ppos, tmpbuf, len); 73dc9a16e4STom Tucker } 74dc9a16e4STom Tucker 751da177e4SLinus Torvalds static int 76fe2c6338SJoe Perches proc_dodebug(struct ctl_table *table, int write, 771da177e4SLinus Torvalds void __user *buffer, size_t *lenp, loff_t *ppos) 781da177e4SLinus Torvalds { 79941c3ff3SKinglong Mee char tmpbuf[20], c, *s = NULL; 801da177e4SLinus Torvalds char __user *p; 811da177e4SLinus Torvalds unsigned int value; 821da177e4SLinus Torvalds size_t left, len; 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds if ((*ppos && !write) || !*lenp) { 851da177e4SLinus Torvalds *lenp = 0; 861da177e4SLinus Torvalds return 0; 871da177e4SLinus Torvalds } 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds left = *lenp; 901da177e4SLinus Torvalds 911da177e4SLinus Torvalds if (write) { 921da177e4SLinus Torvalds if (!access_ok(VERIFY_READ, buffer, left)) 931da177e4SLinus Torvalds return -EFAULT; 941da177e4SLinus Torvalds p = buffer; 951da177e4SLinus Torvalds while (left && __get_user(c, p) >= 0 && isspace(c)) 961da177e4SLinus Torvalds left--, p++; 971da177e4SLinus Torvalds if (!left) 981da177e4SLinus Torvalds goto done; 991da177e4SLinus Torvalds 1001da177e4SLinus Torvalds if (left > sizeof(tmpbuf) - 1) 1011da177e4SLinus Torvalds return -EINVAL; 1021da177e4SLinus Torvalds if (copy_from_user(tmpbuf, p, left)) 1031da177e4SLinus Torvalds return -EFAULT; 1041da177e4SLinus Torvalds tmpbuf[left] = '\0'; 1051da177e4SLinus Torvalds 106941c3ff3SKinglong Mee value = simple_strtol(tmpbuf, &s, 0); 107941c3ff3SKinglong Mee if (s) { 108941c3ff3SKinglong Mee left -= (s - tmpbuf); 109941c3ff3SKinglong Mee if (left && !isspace(*s)) 1101da177e4SLinus Torvalds return -EINVAL; 1111da177e4SLinus Torvalds while (left && isspace(*s)) 1121da177e4SLinus Torvalds left--, s++; 113941c3ff3SKinglong Mee } else 114941c3ff3SKinglong Mee left = 0; 1151da177e4SLinus Torvalds *(unsigned int *) table->data = value; 1161da177e4SLinus Torvalds /* Display the RPC tasks on writing to rpc_debug */ 117bc2a3f86SJ. Bruce Fields if (strcmp(table->procname, "rpc_debug") == 0) 11870abc49bSStanislav Kinsbursky rpc_show_tasks(&init_net); 1191da177e4SLinus Torvalds } else { 120941c3ff3SKinglong Mee len = sprintf(tmpbuf, "0x%04x", *(unsigned int *) table->data); 1211da177e4SLinus Torvalds if (len > left) 1221da177e4SLinus Torvalds len = left; 123941c3ff3SKinglong Mee if (copy_to_user(buffer, tmpbuf, len)) 1241da177e4SLinus Torvalds return -EFAULT; 1251da177e4SLinus Torvalds if ((left -= len) > 0) { 1261da177e4SLinus Torvalds if (put_user('\n', (char __user *)buffer + len)) 1271da177e4SLinus Torvalds return -EFAULT; 1281da177e4SLinus Torvalds left--; 1291da177e4SLinus Torvalds } 1301da177e4SLinus Torvalds } 1311da177e4SLinus Torvalds 1321da177e4SLinus Torvalds done: 1331da177e4SLinus Torvalds *lenp -= left; 1341da177e4SLinus Torvalds *ppos += *lenp; 1351da177e4SLinus Torvalds return 0; 1361da177e4SLinus Torvalds } 1371da177e4SLinus Torvalds 138a246b010SChuck Lever 139fe2c6338SJoe Perches static struct ctl_table debug_table[] = { 1401da177e4SLinus Torvalds { 1411da177e4SLinus Torvalds .procname = "rpc_debug", 1421da177e4SLinus Torvalds .data = &rpc_debug, 1431da177e4SLinus Torvalds .maxlen = sizeof(int), 1441da177e4SLinus Torvalds .mode = 0644, 1456d456111SEric W. Biederman .proc_handler = proc_dodebug 1461da177e4SLinus Torvalds }, 1471da177e4SLinus Torvalds { 1481da177e4SLinus Torvalds .procname = "nfs_debug", 1491da177e4SLinus Torvalds .data = &nfs_debug, 1501da177e4SLinus Torvalds .maxlen = sizeof(int), 1511da177e4SLinus Torvalds .mode = 0644, 1526d456111SEric W. Biederman .proc_handler = proc_dodebug 1531da177e4SLinus Torvalds }, 1541da177e4SLinus Torvalds { 1551da177e4SLinus Torvalds .procname = "nfsd_debug", 1561da177e4SLinus Torvalds .data = &nfsd_debug, 1571da177e4SLinus Torvalds .maxlen = sizeof(int), 1581da177e4SLinus Torvalds .mode = 0644, 1596d456111SEric W. Biederman .proc_handler = proc_dodebug 1601da177e4SLinus Torvalds }, 1611da177e4SLinus Torvalds { 1621da177e4SLinus Torvalds .procname = "nlm_debug", 1631da177e4SLinus Torvalds .data = &nlm_debug, 1641da177e4SLinus Torvalds .maxlen = sizeof(int), 1651da177e4SLinus Torvalds .mode = 0644, 1666d456111SEric W. Biederman .proc_handler = proc_dodebug 1671da177e4SLinus Torvalds }, 168dc9a16e4STom Tucker { 169dc9a16e4STom Tucker .procname = "transports", 170dc9a16e4STom Tucker .maxlen = 256, 171dc9a16e4STom Tucker .mode = 0444, 1726d456111SEric W. Biederman .proc_handler = proc_do_xprt, 173dc9a16e4STom Tucker }, 174f8572d8fSEric W. Biederman { } 1751da177e4SLinus Torvalds }; 1761da177e4SLinus Torvalds 177fe2c6338SJoe Perches static struct ctl_table sunrpc_table[] = { 1781da177e4SLinus Torvalds { 1791da177e4SLinus Torvalds .procname = "sunrpc", 1801da177e4SLinus Torvalds .mode = 0555, 1811da177e4SLinus Torvalds .child = debug_table 1821da177e4SLinus Torvalds }, 183f8572d8fSEric W. Biederman { } 1841da177e4SLinus Torvalds }; 1851da177e4SLinus Torvalds 1861da177e4SLinus Torvalds #endif 187