1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * linux/fs/nfs/sysctl.c 4 * 5 * Sysctl interface to NFS parameters 6 */ 7 #include <linux/types.h> 8 #include <linux/linkage.h> 9 #include <linux/ctype.h> 10 #include <linux/fs.h> 11 #include <linux/sysctl.h> 12 #include <linux/module.h> 13 #include <linux/nfs_fs.h> 14 15 static struct ctl_table_header *nfs_callback_sysctl_table; 16 17 static struct ctl_table nfs_cb_sysctls[] = { 18 { 19 .procname = "nfs_mountpoint_timeout", 20 .data = &nfs_mountpoint_expiry_timeout, 21 .maxlen = sizeof(nfs_mountpoint_expiry_timeout), 22 .mode = 0644, 23 .proc_handler = proc_dointvec_jiffies, 24 }, 25 { 26 .procname = "nfs_congestion_kb", 27 .data = &nfs_congestion_kb, 28 .maxlen = sizeof(nfs_congestion_kb), 29 .mode = 0644, 30 .proc_handler = proc_dointvec, 31 }, 32 { } 33 }; 34 35 int nfs_register_sysctl(void) 36 { 37 nfs_callback_sysctl_table = register_sysctl("fs/nfs", nfs_cb_sysctls); 38 if (nfs_callback_sysctl_table == NULL) 39 return -ENOMEM; 40 return 0; 41 } 42 43 void nfs_unregister_sysctl(void) 44 { 45 unregister_sysctl_table(nfs_callback_sysctl_table); 46 nfs_callback_sysctl_table = NULL; 47 } 48