1 /* 2 * linux/fs/nfs/sysctl.c 3 * 4 * Sysctl interface to NFS parameters 5 */ 6 #include <linux/types.h> 7 #include <linux/linkage.h> 8 #include <linux/ctype.h> 9 #include <linux/fs.h> 10 #include <linux/sysctl.h> 11 #include <linux/module.h> 12 #include <linux/nfs4.h> 13 #include <linux/nfs_idmap.h> 14 #include <linux/nfs_fs.h> 15 16 #include "callback.h" 17 18 static const int nfs_set_port_min = 0; 19 static const int nfs_set_port_max = 65535; 20 static struct ctl_table_header *nfs_callback_sysctl_table; 21 22 static ctl_table nfs_cb_sysctls[] = { 23 #ifdef CONFIG_NFS_V4 24 { 25 .ctl_name = CTL_UNNUMBERED, 26 .procname = "nfs_callback_tcpport", 27 .data = &nfs_callback_set_tcpport, 28 .maxlen = sizeof(int), 29 .mode = 0644, 30 .proc_handler = &proc_dointvec_minmax, 31 .extra1 = (int *)&nfs_set_port_min, 32 .extra2 = (int *)&nfs_set_port_max, 33 }, 34 { 35 .ctl_name = CTL_UNNUMBERED, 36 .procname = "idmap_cache_timeout", 37 .data = &nfs_idmap_cache_timeout, 38 .maxlen = sizeof(int), 39 .mode = 0644, 40 .proc_handler = &proc_dointvec_jiffies, 41 .strategy = &sysctl_jiffies, 42 }, 43 #endif 44 { 45 .ctl_name = CTL_UNNUMBERED, 46 .procname = "nfs_mountpoint_timeout", 47 .data = &nfs_mountpoint_expiry_timeout, 48 .maxlen = sizeof(nfs_mountpoint_expiry_timeout), 49 .mode = 0644, 50 .proc_handler = &proc_dointvec_jiffies, 51 .strategy = &sysctl_jiffies, 52 }, 53 { 54 .ctl_name = CTL_UNNUMBERED, 55 .procname = "nfs_congestion_kb", 56 .data = &nfs_congestion_kb, 57 .maxlen = sizeof(nfs_congestion_kb), 58 .mode = 0644, 59 .proc_handler = &proc_dointvec, 60 }, 61 { .ctl_name = 0 } 62 }; 63 64 static ctl_table nfs_cb_sysctl_dir[] = { 65 { 66 .ctl_name = CTL_UNNUMBERED, 67 .procname = "nfs", 68 .mode = 0555, 69 .child = nfs_cb_sysctls, 70 }, 71 { .ctl_name = 0 } 72 }; 73 74 static ctl_table nfs_cb_sysctl_root[] = { 75 { 76 .ctl_name = CTL_FS, 77 .procname = "fs", 78 .mode = 0555, 79 .child = nfs_cb_sysctl_dir, 80 }, 81 { .ctl_name = 0 } 82 }; 83 84 int nfs_register_sysctl(void) 85 { 86 nfs_callback_sysctl_table = register_sysctl_table(nfs_cb_sysctl_root); 87 if (nfs_callback_sysctl_table == NULL) 88 return -ENOMEM; 89 return 0; 90 } 91 92 void nfs_unregister_sysctl(void) 93 { 94 unregister_sysctl_table(nfs_callback_sysctl_table); 95 nfs_callback_sysctl_table = NULL; 96 } 97