// SPDX-License-Identifier: GPL-2.0 /* * linux/fs/fuse/fuse_sysctl.c * * Sysctl interface to fuse parameters */ #include <linux/sysctl.h> #include "fuse_i.h" static struct ctl_table_header *fuse_table_header; /* Bound by fuse_init_out max_pages, which is a u16 */ static unsigned int sysctl_fuse_max_pages_limit = 65535; /* * fuse_init_out request timeouts are u16. * This goes up to ~18 hours, which is plenty for a timeout. */ static unsigned int sysctl_fuse_req_timeout_limit = 65535; static const struct ctl_table fuse_sysctl_table[] = { { .procname = "max_pages_limit", .data = &fuse_max_pages_limit, .maxlen = sizeof(fuse_max_pages_limit), .mode = 0644, .proc_handler = proc_douintvec_minmax, .extra1 = SYSCTL_ONE, .extra2 = &sysctl_fuse_max_pages_limit, }, { .procname = "default_request_timeout", .data = &fuse_default_req_timeout, .maxlen = sizeof(fuse_default_req_timeout), .mode = 0644, .proc_handler = proc_douintvec_minmax, .extra1 = SYSCTL_ZERO, .extra2 = &sysctl_fuse_req_timeout_limit, }, { .procname = "max_request_timeout", .data = &fuse_max_req_timeout, .maxlen = sizeof(fuse_max_req_timeout), .mode = 0644, .proc_handler = proc_douintvec_minmax, .extra1 = SYSCTL_ZERO, .extra2 = &sysctl_fuse_req_timeout_limit, }, }; int fuse_sysctl_register(void) { fuse_table_header = register_sysctl("fs/fuse", fuse_sysctl_table); if (!fuse_table_header) return -ENOMEM; return 0; } void fuse_sysctl_unregister(void) { unregister_sysctl_table(fuse_table_header); fuse_table_header = NULL; }