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 171da177e4SLinus Torvalds #include <asm/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 231da177e4SLinus Torvalds /* 241da177e4SLinus Torvalds * Declare the debug flags here 251da177e4SLinus Torvalds */ 261da177e4SLinus Torvalds unsigned int rpc_debug; 27e8914c65STrond Myklebust EXPORT_SYMBOL_GPL(rpc_debug); 28a6eaf8bdSTrond Myklebust 291da177e4SLinus Torvalds unsigned int nfs_debug; 30e8914c65STrond Myklebust EXPORT_SYMBOL_GPL(nfs_debug); 31a6eaf8bdSTrond Myklebust 321da177e4SLinus Torvalds unsigned int nfsd_debug; 33e8914c65STrond Myklebust EXPORT_SYMBOL_GPL(nfsd_debug); 34a6eaf8bdSTrond Myklebust 351da177e4SLinus Torvalds unsigned int nlm_debug; 36e8914c65STrond Myklebust EXPORT_SYMBOL_GPL(nlm_debug); 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds #ifdef RPC_DEBUG 391da177e4SLinus Torvalds 401da177e4SLinus Torvalds static struct ctl_table_header *sunrpc_table_header; 411da177e4SLinus Torvalds static ctl_table sunrpc_table[]; 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds void 441da177e4SLinus Torvalds rpc_register_sysctl(void) 451da177e4SLinus Torvalds { 462b1bec5fSEric W. Biederman if (!sunrpc_table_header) 470b4d4147SEric W. Biederman sunrpc_table_header = register_sysctl_table(sunrpc_table); 481da177e4SLinus Torvalds } 491da177e4SLinus Torvalds 501da177e4SLinus Torvalds void 511da177e4SLinus Torvalds rpc_unregister_sysctl(void) 521da177e4SLinus Torvalds { 531da177e4SLinus Torvalds if (sunrpc_table_header) { 541da177e4SLinus Torvalds unregister_sysctl_table(sunrpc_table_header); 551da177e4SLinus Torvalds sunrpc_table_header = NULL; 561da177e4SLinus Torvalds } 571da177e4SLinus Torvalds } 581da177e4SLinus Torvalds 598d65af78SAlexey Dobriyan static int proc_do_xprt(ctl_table *table, int write, 60dc9a16e4STom Tucker void __user *buffer, size_t *lenp, loff_t *ppos) 61dc9a16e4STom Tucker { 62dc9a16e4STom Tucker char tmpbuf[256]; 6327df6f25SCyrill Gorcunov size_t len; 6427df6f25SCyrill Gorcunov 65dc9a16e4STom Tucker if ((*ppos && !write) || !*lenp) { 66dc9a16e4STom Tucker *lenp = 0; 67dc9a16e4STom Tucker return 0; 68dc9a16e4STom Tucker } 69dc9a16e4STom Tucker len = svc_print_xprts(tmpbuf, sizeof(tmpbuf)); 7027df6f25SCyrill Gorcunov return simple_read_from_buffer(buffer, *lenp, ppos, tmpbuf, len); 71dc9a16e4STom Tucker } 72dc9a16e4STom Tucker 731da177e4SLinus Torvalds static int 748d65af78SAlexey Dobriyan proc_dodebug(ctl_table *table, int write, 751da177e4SLinus Torvalds void __user *buffer, size_t *lenp, loff_t *ppos) 761da177e4SLinus Torvalds { 771da177e4SLinus Torvalds char tmpbuf[20], c, *s; 781da177e4SLinus Torvalds char __user *p; 791da177e4SLinus Torvalds unsigned int value; 801da177e4SLinus Torvalds size_t left, len; 811da177e4SLinus Torvalds 821da177e4SLinus Torvalds if ((*ppos && !write) || !*lenp) { 831da177e4SLinus Torvalds *lenp = 0; 841da177e4SLinus Torvalds return 0; 851da177e4SLinus Torvalds } 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds left = *lenp; 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds if (write) { 901da177e4SLinus Torvalds if (!access_ok(VERIFY_READ, buffer, left)) 911da177e4SLinus Torvalds return -EFAULT; 921da177e4SLinus Torvalds p = buffer; 931da177e4SLinus Torvalds while (left && __get_user(c, p) >= 0 && isspace(c)) 941da177e4SLinus Torvalds left--, p++; 951da177e4SLinus Torvalds if (!left) 961da177e4SLinus Torvalds goto done; 971da177e4SLinus Torvalds 981da177e4SLinus Torvalds if (left > sizeof(tmpbuf) - 1) 991da177e4SLinus Torvalds return -EINVAL; 1001da177e4SLinus Torvalds if (copy_from_user(tmpbuf, p, left)) 1011da177e4SLinus Torvalds return -EFAULT; 1021da177e4SLinus Torvalds tmpbuf[left] = '\0'; 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds for (s = tmpbuf, value = 0; '0' <= *s && *s <= '9'; s++, left--) 1051da177e4SLinus Torvalds value = 10 * value + (*s - '0'); 1061da177e4SLinus Torvalds if (*s && !isspace(*s)) 1071da177e4SLinus Torvalds return -EINVAL; 1081da177e4SLinus Torvalds while (left && isspace(*s)) 1091da177e4SLinus Torvalds left--, s++; 1101da177e4SLinus Torvalds *(unsigned int *) table->data = value; 1111da177e4SLinus Torvalds /* Display the RPC tasks on writing to rpc_debug */ 112bc2a3f86SJ. Bruce Fields if (strcmp(table->procname, "rpc_debug") == 0) 1131da177e4SLinus Torvalds rpc_show_tasks(); 1141da177e4SLinus Torvalds } else { 1151da177e4SLinus Torvalds if (!access_ok(VERIFY_WRITE, buffer, left)) 1161da177e4SLinus Torvalds return -EFAULT; 1171da177e4SLinus Torvalds len = sprintf(tmpbuf, "%d", *(unsigned int *) table->data); 1181da177e4SLinus Torvalds if (len > left) 1191da177e4SLinus Torvalds len = left; 1201da177e4SLinus Torvalds if (__copy_to_user(buffer, tmpbuf, len)) 1211da177e4SLinus Torvalds return -EFAULT; 1221da177e4SLinus Torvalds if ((left -= len) > 0) { 1231da177e4SLinus Torvalds if (put_user('\n', (char __user *)buffer + len)) 1241da177e4SLinus Torvalds return -EFAULT; 1251da177e4SLinus Torvalds left--; 1261da177e4SLinus Torvalds } 1271da177e4SLinus Torvalds } 1281da177e4SLinus Torvalds 1291da177e4SLinus Torvalds done: 1301da177e4SLinus Torvalds *lenp -= left; 1311da177e4SLinus Torvalds *ppos += *lenp; 1321da177e4SLinus Torvalds return 0; 1331da177e4SLinus Torvalds } 1341da177e4SLinus Torvalds 135a246b010SChuck Lever 1361da177e4SLinus Torvalds static ctl_table debug_table[] = { 1371da177e4SLinus Torvalds { 1381da177e4SLinus Torvalds .procname = "rpc_debug", 1391da177e4SLinus Torvalds .data = &rpc_debug, 1401da177e4SLinus Torvalds .maxlen = sizeof(int), 1411da177e4SLinus Torvalds .mode = 0644, 1426d456111SEric W. Biederman .proc_handler = proc_dodebug 1431da177e4SLinus Torvalds }, 1441da177e4SLinus Torvalds { 1451da177e4SLinus Torvalds .procname = "nfs_debug", 1461da177e4SLinus Torvalds .data = &nfs_debug, 1471da177e4SLinus Torvalds .maxlen = sizeof(int), 1481da177e4SLinus Torvalds .mode = 0644, 1496d456111SEric W. Biederman .proc_handler = proc_dodebug 1501da177e4SLinus Torvalds }, 1511da177e4SLinus Torvalds { 1521da177e4SLinus Torvalds .procname = "nfsd_debug", 1531da177e4SLinus Torvalds .data = &nfsd_debug, 1541da177e4SLinus Torvalds .maxlen = sizeof(int), 1551da177e4SLinus Torvalds .mode = 0644, 1566d456111SEric W. Biederman .proc_handler = proc_dodebug 1571da177e4SLinus Torvalds }, 1581da177e4SLinus Torvalds { 1591da177e4SLinus Torvalds .procname = "nlm_debug", 1601da177e4SLinus Torvalds .data = &nlm_debug, 1611da177e4SLinus Torvalds .maxlen = sizeof(int), 1621da177e4SLinus Torvalds .mode = 0644, 1636d456111SEric W. Biederman .proc_handler = proc_dodebug 1641da177e4SLinus Torvalds }, 165dc9a16e4STom Tucker { 166dc9a16e4STom Tucker .procname = "transports", 167dc9a16e4STom Tucker .maxlen = 256, 168dc9a16e4STom Tucker .mode = 0444, 1696d456111SEric W. Biederman .proc_handler = proc_do_xprt, 170dc9a16e4STom Tucker }, 171f8572d8fSEric W. Biederman { } 1721da177e4SLinus Torvalds }; 1731da177e4SLinus Torvalds 1741da177e4SLinus Torvalds static ctl_table sunrpc_table[] = { 1751da177e4SLinus Torvalds { 1761da177e4SLinus Torvalds .procname = "sunrpc", 1771da177e4SLinus Torvalds .mode = 0555, 1781da177e4SLinus Torvalds .child = debug_table 1791da177e4SLinus Torvalds }, 180f8572d8fSEric W. Biederman { } 1811da177e4SLinus Torvalds }; 1821da177e4SLinus Torvalds 1831da177e4SLinus Torvalds #endif 184