fs/fuse/sysctl.c

   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 }