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/nfs_fs.h> 13 14 static struct ctl_table_header *nfs_callback_sysctl_table; 15 16 static struct ctl_table nfs_cb_sysctls[] = { 17 { 18 .procname = "nfs_mountpoint_timeout", 19 .data = &nfs_mountpoint_expiry_timeout, 20 .maxlen = sizeof(nfs_mountpoint_expiry_timeout), 21 .mode = 0644, 22 .proc_handler = proc_dointvec_jiffies, 23 }, 24 { 25 .procname = "nfs_congestion_kb", 26 .data = &nfs_congestion_kb, 27 .maxlen = sizeof(nfs_congestion_kb), 28 .mode = 0644, 29 .proc_handler = proc_dointvec, 30 }, 31 { } 32 }; 33 34 static struct ctl_table nfs_cb_sysctl_dir[] = { 35 { 36 .procname = "nfs", 37 .mode = 0555, 38 .child = nfs_cb_sysctls, 39 }, 40 { } 41 }; 42 43 static struct ctl_table nfs_cb_sysctl_root[] = { 44 { 45 .procname = "fs", 46 .mode = 0555, 47 .child = nfs_cb_sysctl_dir, 48 }, 49 { } 50 }; 51 52 int nfs_register_sysctl(void) 53 { 54 nfs_callback_sysctl_table = register_sysctl_table(nfs_cb_sysctl_root); 55 if (nfs_callback_sysctl_table == NULL) 56 return -ENOMEM; 57 return 0; 58 } 59 60 void nfs_unregister_sysctl(void) 61 { 62 unregister_sysctl_table(nfs_callback_sysctl_table); 63 nfs_callback_sysctl_table = NULL; 64 } 65