/core/10.5/fusefs/fuse_sysctl.c
C | 308 lines | 253 code | 41 blank | 14 comment | 30 complexity | ac2e17a9af13284f272aca12ee9586e1 MD5 | raw file
1/* 2 * Copyright (C) 2006-2008 Google. All Rights Reserved. 3 * Amit Singh <singh@> 4 */ 5 6#include <sys/systm.h> 7#include <sys/types.h> 8#include <sys/sysctl.h> 9 10#include "fuse.h" 11#include "fuse_device.h" 12#include "fuse_sysctl.h" 13#include <fuse_param.h> 14#include <fuse_version.h> 15 16/* NB: none of these are bigger than unsigned 32-bit. */ 17 18int32_t fuse_admin_group = 0; // rw 19int32_t fuse_allow_other = 0; // rw 20uint32_t fuse_api_major = FUSE_KERNEL_VERSION; // r 21uint32_t fuse_api_minor = FUSE_KERNEL_MINOR_VERSION; // r 22int32_t fuse_fh_current = 0; // r 23uint32_t fuse_fh_reuse_count = 0; // r 24uint32_t fuse_fh_upcall_count = 0; // r 25uint32_t fuse_fh_zombies = 0; // r 26int32_t fuse_iov_credit = FUSE_DEFAULT_IOV_CREDIT; // rw 27int32_t fuse_iov_current = 0; // r 28uint32_t fuse_iov_permanent_bufsize = FUSE_DEFAULT_IOV_PERMANENT_BUFSIZE; // rw 29int32_t fuse_kill = -1; // w 30int32_t fuse_print_vnodes = -1; // w 31uint32_t fuse_lookup_cache_hits = 0; // r 32uint32_t fuse_lookup_cache_misses = 0; // r 33uint32_t fuse_lookup_cache_overrides = 0; // r 34uint32_t fuse_max_freetickets = FUSE_DEFAULT_MAX_FREE_TICKETS; // rw 35uint32_t fuse_max_tickets = 0; // rw 36int32_t fuse_mount_count = 0; // r 37int32_t fuse_memory_allocated = 0; // r 38int32_t fuse_realloc_count = 0; // r 39int32_t fuse_tickets_current = 0; // r 40uint32_t fuse_userkernel_bufsize = FUSE_DEFAULT_USERKERNEL_BUFSIZE; // rw 41int32_t fuse_vnodes_current = 0; // r 42 43SYSCTL_DECL(_macfuse); 44SYSCTL_NODE(, OID_AUTO, macfuse, CTLFLAG_RW, 0, 45 "MacFUSE Sysctl Interface"); 46SYSCTL_NODE(_macfuse, OID_AUTO, control, CTLFLAG_RW, 0, 47 "MacFUSE Controls"); 48SYSCTL_NODE(_macfuse, OID_AUTO, counters, CTLFLAG_RW, 0, 49 "MacFUSE Monotonic Counters"); 50SYSCTL_NODE(_macfuse, OID_AUTO, resourceusage, CTLFLAG_RW, 0, 51 "MacFUSE Resource Usage"); 52SYSCTL_NODE(_macfuse, OID_AUTO, tunables, CTLFLAG_RW, 0, 53 "MacFUSE Tunables"); 54SYSCTL_NODE(_macfuse, OID_AUTO, version, CTLFLAG_RW, 0, 55 "MacFUSE Version Information"); 56 57/* fuse.control */ 58 59int sysctl_macfuse_control_kill_handler SYSCTL_HANDLER_ARGS; 60int sysctl_macfuse_control_print_vnodes_handler SYSCTL_HANDLER_ARGS; 61int sysctl_macfuse_tunables_userkernel_bufsize_handler SYSCTL_HANDLER_ARGS; 62 63int 64sysctl_macfuse_control_kill_handler SYSCTL_HANDLER_ARGS 65{ 66 int error = 0; 67 (void)oidp; 68 69 if (arg1) { 70 error = SYSCTL_OUT(req, arg1, sizeof(int)); 71 } else { 72 error = SYSCTL_OUT(req, &arg2, sizeof(int)); 73 } 74 75 if (error || !req->newptr) { 76 return error; 77 } 78 79 if (!arg1) { 80 error = EPERM; 81 } else { 82 error = SYSCTL_IN(req, arg1, sizeof(int)); 83 if (error == 0) { 84 error = fuse_device_kill(*(int *)arg1, req->p); 85 } 86 fuse_kill = -1; /* set it back */ 87 } 88 89 return error; 90} 91 92int 93sysctl_macfuse_control_print_vnodes_handler SYSCTL_HANDLER_ARGS 94{ 95 int error = 0; 96 (void)oidp; 97 98 if (arg1) { 99 error = SYSCTL_OUT(req, arg1, sizeof(uint32_t)); 100 } else { 101 error = SYSCTL_OUT(req, &arg2, sizeof(uint32_t)); 102 } 103 104 if (error || !req->newptr) { 105 return error; 106 } 107 108 if (!arg1) { 109 error = EPERM; 110 } else { 111 error = SYSCTL_IN(req, arg1, sizeof(int)); 112 if (error == 0) { 113 error = fuse_device_print_vnodes(*(int *)arg1, req->p); 114 } 115 fuse_print_vnodes = -1; /* set it back */ 116 } 117 118 return error; 119} 120 121int 122sysctl_macfuse_tunables_userkernel_bufsize_handler SYSCTL_HANDLER_ARGS 123{ 124 int error = 0; 125 (void)oidp; 126 127 if (arg1) { 128 error = SYSCTL_OUT(req, arg1, sizeof(int)); 129 } else { 130 error = SYSCTL_OUT(req, &arg2, sizeof(int)); 131 } 132 133 if (error || !req->newptr) { 134 return error; 135 } 136 137 if (!arg1) { 138 error = EPERM; 139 } else { 140 error = SYSCTL_IN(req, arg1, sizeof(uint32_t)); 141 if (error == 0) { 142 uint32_t incoming = *(uint32_t *)arg1; 143 incoming = fuse_round_page_32(incoming); 144 if (incoming > FUSE_MAX_USERKERNEL_BUFSIZE) { 145 error = E2BIG; 146 } else if (incoming < FUSE_MIN_USERKERNEL_BUFSIZE) { 147 error = EINVAL; 148 } else { 149 fuse_userkernel_bufsize = incoming; 150 } 151 } 152 } 153 154 return error; 155} 156 157SYSCTL_PROC(_macfuse_control, // our parent 158 OID_AUTO, // automatically assign object ID 159 kill, // our name 160 161 // type flag/access flag 162 (CTLTYPE_INT | CTLFLAG_WR | CTLFLAG_ANYBODY), 163 164 &fuse_kill, // location of our data 165 0, // argument passed to our handler 166 167 // our handler function 168 sysctl_macfuse_control_kill_handler, 169 170 "I", // our data type (integer) 171 "MacFUSE Controls: Kill the Given File System"); 172 173SYSCTL_PROC(_macfuse_control, // our parent 174 OID_AUTO, // automatically assign object ID 175 print_vnodes, // our name 176 177 // type flag/access flag 178 (CTLTYPE_INT | CTLFLAG_WR), 179 180 &fuse_print_vnodes, // location of our data 181 0, // argument passed to our handler 182 183 // our handler function 184 sysctl_macfuse_control_print_vnodes_handler, 185 186 "I", // our data type (integer) 187 "MacFUSE Controls: Print Vnodes for the Given File System"); 188 189/* fuse.counters */ 190SYSCTL_INT(_macfuse_counters, OID_AUTO, filehandle_reuse, CTLFLAG_RD, 191 &fuse_fh_reuse_count, 0, ""); 192SYSCTL_INT(_macfuse_counters, OID_AUTO, filehandle_upcalls, CTLFLAG_RD, 193 &fuse_fh_upcall_count, 0, ""); 194SYSCTL_INT(_macfuse_counters, OID_AUTO, lookup_cache_hits, CTLFLAG_RD, 195 &fuse_lookup_cache_hits, 0, ""); 196SYSCTL_INT(_macfuse_counters, OID_AUTO, lookup_cache_misses, CTLFLAG_RD, 197 &fuse_lookup_cache_misses, 0, ""); 198SYSCTL_INT(_macfuse_counters, OID_AUTO, lookup_cache_overrides, 199 CTLFLAG_RD, &fuse_lookup_cache_overrides, 0, ""); 200SYSCTL_INT(_macfuse_counters, OID_AUTO, memory_reallocs, CTLFLAG_RD, 201 &fuse_realloc_count, 0, ""); 202 203/* fuse.resourceusage */ 204SYSCTL_INT(_macfuse_resourceusage, OID_AUTO, filehandles, CTLFLAG_RD, 205 &fuse_fh_current, 0, ""); 206SYSCTL_INT(_macfuse_resourceusage, OID_AUTO, filehandles_zombies, CTLFLAG_RD, 207 &fuse_fh_zombies, 0, ""); 208SYSCTL_INT(_macfuse_resourceusage, OID_AUTO, ipc_iovs, CTLFLAG_RD, 209 &fuse_iov_current, 0, ""); 210SYSCTL_INT(_macfuse_resourceusage, OID_AUTO, ipc_tickets, CTLFLAG_RD, 211 &fuse_tickets_current, 0, ""); 212SYSCTL_INT(_macfuse_resourceusage, OID_AUTO, memory_bytes, CTLFLAG_RD, 213 &fuse_memory_allocated, 0, ""); 214SYSCTL_INT(_macfuse_resourceusage, OID_AUTO, mounts, CTLFLAG_RD, 215 &fuse_mount_count, 0, ""); 216SYSCTL_INT(_macfuse_resourceusage, OID_AUTO, vnodes, CTLFLAG_RD, 217 &fuse_vnodes_current, 0, ""); 218 219/* fuse.tunables */ 220SYSCTL_INT(_macfuse_tunables, OID_AUTO, admin_group, CTLFLAG_RW, 221 &fuse_admin_group, 0, ""); 222SYSCTL_INT(_macfuse_tunables, OID_AUTO, allow_other, CTLFLAG_RW, 223 &fuse_allow_other, 0, ""); 224SYSCTL_INT(_macfuse_tunables, OID_AUTO, iov_credit, CTLFLAG_RW, 225 &fuse_iov_credit, 0, ""); 226SYSCTL_INT(_macfuse_tunables, OID_AUTO, iov_permanent_bufsize, CTLFLAG_RW, 227 &fuse_iov_permanent_bufsize, 0, ""); 228SYSCTL_INT(_macfuse_tunables, OID_AUTO, max_freetickets, CTLFLAG_RW, 229 &fuse_max_freetickets, 0, ""); 230SYSCTL_INT(_macfuse_tunables, OID_AUTO, max_tickets, CTLFLAG_RW, 231 &fuse_max_tickets, 0, ""); 232SYSCTL_PROC(_macfuse_tunables, // our parent 233 OID_AUTO, // automatically assign object ID 234 userkernel_bufsize, // our name 235 (CTLTYPE_INT | CTLFLAG_WR), // type flag/access flag 236 &fuse_userkernel_bufsize, // location of our data 237 0, // argument passed to our handler 238 sysctl_macfuse_tunables_userkernel_bufsize_handler, 239 "I", // our data type (integer) 240 "MacFUSE Tunables"); // our description 241 242/* fuse.version */ 243SYSCTL_INT(_macfuse_version, OID_AUTO, api_major, CTLFLAG_RD, 244 &fuse_api_major, 0, ""); 245SYSCTL_INT(_macfuse_version, OID_AUTO, api_minor, CTLFLAG_RD, 246 &fuse_api_minor, 0, ""); 247SYSCTL_STRING(_macfuse_version, OID_AUTO, number, CTLFLAG_RD, 248 MACFUSE_VERSION, 0, ""); 249SYSCTL_STRING(_macfuse_version, OID_AUTO, string, CTLFLAG_RD, 250 MACFUSE_VERSION ", " MACFUSE_TIMESTAMP, 0, ""); 251 252static struct sysctl_oid *fuse_sysctl_list[] = 253{ 254 &sysctl__macfuse_control, 255 &sysctl__macfuse_counters, 256 &sysctl__macfuse_resourceusage, 257 &sysctl__macfuse_tunables, 258 &sysctl__macfuse_version, 259 &sysctl__macfuse_control_kill, 260 &sysctl__macfuse_control_print_vnodes, 261 &sysctl__macfuse_counters_filehandle_reuse, 262 &sysctl__macfuse_counters_filehandle_upcalls, 263 &sysctl__macfuse_counters_lookup_cache_hits, 264 &sysctl__macfuse_counters_lookup_cache_misses, 265 &sysctl__macfuse_counters_lookup_cache_overrides, 266 &sysctl__macfuse_counters_memory_reallocs, 267 &sysctl__macfuse_resourceusage_filehandles, 268 &sysctl__macfuse_resourceusage_filehandles_zombies, 269 &sysctl__macfuse_resourceusage_ipc_iovs, 270 &sysctl__macfuse_resourceusage_ipc_tickets, 271 &sysctl__macfuse_resourceusage_memory_bytes, 272 &sysctl__macfuse_resourceusage_mounts, 273 &sysctl__macfuse_resourceusage_vnodes, 274 &sysctl__macfuse_tunables_admin_group, 275 &sysctl__macfuse_tunables_allow_other, 276 &sysctl__macfuse_tunables_iov_credit, 277 &sysctl__macfuse_tunables_iov_permanent_bufsize, 278 &sysctl__macfuse_tunables_max_freetickets, 279 &sysctl__macfuse_tunables_max_tickets, 280 &sysctl__macfuse_tunables_userkernel_bufsize, 281 &sysctl__macfuse_version_api_major, 282 &sysctl__macfuse_version_api_minor, 283 &sysctl__macfuse_version_number, 284 &sysctl__macfuse_version_string, 285 (struct sysctl_oid *)0 286}; 287 288void 289fuse_sysctl_start(void) 290{ 291 int i; 292 293 sysctl_register_oid(&sysctl__macfuse); 294 for (i = 0; fuse_sysctl_list[i]; i++) { 295 sysctl_register_oid(fuse_sysctl_list[i]); 296 } 297} 298 299void 300fuse_sysctl_stop(void) 301{ 302 int i; 303 304 for (i = 0; fuse_sysctl_list[i]; i++) { 305 sysctl_unregister_oid(fuse_sysctl_list[i]); 306 } 307 sysctl_unregister_oid(&sysctl__macfuse); 308}