1 /* 2 * linux/fs/nfs/nfs4sysctl.c 3 * 4 * Sysctl interface to NFS v4 parameters 5 * 6 * Copyright (c) 2006 Trond Myklebust <Trond.Myklebust@netapp.com> 7 */ 8 #include <linux/sysctl.h> 9 #include <linux/nfs_fs.h> 10 11 #include "nfs4_fs.h" 12 #include "nfs4idmap.h" 13 #include "callback.h" 14 15 static const int nfs_set_port_min; 16 static const int nfs_set_port_max = 65535; 17 static struct ctl_table_header *nfs4_callback_sysctl_table; 18 19 static struct ctl_table nfs4_cb_sysctls[] = { 20 { 21 .procname = "nfs_callback_tcpport", 22 .data = &nfs_callback_set_tcpport, 23 .maxlen = sizeof(int), 24 .mode = 0644, 25 .proc_handler = proc_dointvec_minmax, 26 .extra1 = (int *)&nfs_set_port_min, 27 .extra2 = (int *)&nfs_set_port_max, 28 }, 29 { 30 .procname = "idmap_cache_timeout", 31 .data = &nfs_idmap_cache_timeout, 32 .maxlen = sizeof(int), 33 .mode = 0644, 34 .proc_handler = proc_dointvec_jiffies, 35 }, 36 { } 37 }; 38 39 static struct ctl_table nfs4_cb_sysctl_dir[] = { 40 { 41 .procname = "nfs", 42 .mode = 0555, 43 .child = nfs4_cb_sysctls, 44 }, 45 { } 46 }; 47 48 static struct ctl_table nfs4_cb_sysctl_root[] = { 49 { 50 .procname = "fs", 51 .mode = 0555, 52 .child = nfs4_cb_sysctl_dir, 53 }, 54 { } 55 }; 56 57 int nfs4_register_sysctl(void) 58 { 59 nfs4_callback_sysctl_table = register_sysctl_table(nfs4_cb_sysctl_root); 60 if (nfs4_callback_sysctl_table == NULL) 61 return -ENOMEM; 62 return 0; 63 } 64 65 void nfs4_unregister_sysctl(void) 66 { 67 unregister_sysctl_table(nfs4_callback_sysctl_table); 68 nfs4_callback_sysctl_table = NULL; 69 } 70