1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * linux/fs/fuse/fuse_sysctl.c 4 * 5 * Sysctl interface to fuse parameters 6 */ 7 #include <linux/sysctl.h> 8 9 #include "fuse_i.h" 10 11 static struct ctl_table_header *fuse_table_header; 12 13 /* Bound by fuse_init_out max_pages, which is a u16 */ 14 static unsigned int sysctl_fuse_max_pages_limit = 65535; 15 16 static struct ctl_table fuse_sysctl_table[] = { 17 { 18 .procname = "max_pages_limit", 19 .data = &fuse_max_pages_limit, 20 .maxlen = sizeof(fuse_max_pages_limit), 21 .mode = 0644, 22 .proc_handler = proc_douintvec_minmax, 23 .extra1 = SYSCTL_ONE, 24 .extra2 = &sysctl_fuse_max_pages_limit, 25 }, 26 }; 27 28 int fuse_sysctl_register(void) 29 { 30 fuse_table_header = register_sysctl("fs/fuse", fuse_sysctl_table); 31 if (!fuse_table_header) 32 return -ENOMEM; 33 return 0; 34 } 35 36 void fuse_sysctl_unregister(void) 37 { 38 unregister_sysctl_table(fuse_table_header); 39 fuse_table_header = NULL; 40 } 41