| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | #include "ebpf_filesystem.h" |
| 4 | #include "libbpf_api/ebpf_library.h" |
| 5 | |
| 6 | struct config fs_config = APPCONFIG_INITIALIZER; |
| 7 | |
| 8 | ebpf_local_maps_t ext4_maps[] = { |
| 9 | {.name = "tbl_ext4", |
| 10 | .internal_input = NETDATA_KEY_CALLS_SYNC, |
| 11 | .user_input = 0, |
| 12 | .type = NETDATA_EBPF_MAP_STATIC, |
| 13 | .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, |
| 14 | #ifdef LIBBPF_MAJOR_VERSION |
| 15 | .map_type = BPF_MAP_TYPE_PERCPU_ARRAY |
| 16 | #endif |
| 17 | }, |
| 18 | {.name = "tmp_ext4", |
| 19 | .internal_input = NETDATA_FS_TEMP_MAP_SIZE, |
| 20 | .user_input = NETDATA_FS_TEMP_MAP_SIZE, |
| 21 | .type = NETDATA_EBPF_MAP_CONTROLLER, |
| 22 | .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, |
| 23 | #ifdef LIBBPF_MAJOR_VERSION |
| 24 | .map_type = BPF_MAP_TYPE_PERCPU_HASH |
| 25 | #endif |
| 26 | }, |
| 27 | {.name = NULL, |
| 28 | .internal_input = 0, |
| 29 | .user_input = 0, |
| 30 | .type = NETDATA_EBPF_MAP_CONTROLLER, |
| 31 | .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, |
| 32 | #ifdef LIBBPF_MAJOR_VERSION |
| 33 | .map_type = BPF_MAP_TYPE_PERCPU_HASH |
| 34 | #endif |
| 35 | }}; |
| 36 | |
| 37 | ebpf_local_maps_t xfs_maps[] = { |
| 38 | {.name = "tbl_xfs", |
| 39 | .internal_input = NETDATA_KEY_CALLS_SYNC, |
| 40 | .user_input = 0, |
| 41 | .type = NETDATA_EBPF_MAP_STATIC, |
| 42 | .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, |
| 43 | #ifdef LIBBPF_MAJOR_VERSION |
| 44 | .map_type = BPF_MAP_TYPE_PERCPU_ARRAY |
| 45 | #endif |
| 46 | }, |
| 47 | {.name = "tmp_xfs", |
| 48 | .internal_input = NETDATA_FS_TEMP_MAP_SIZE, |
| 49 | .user_input = NETDATA_FS_TEMP_MAP_SIZE, |
| 50 | .type = NETDATA_EBPF_MAP_CONTROLLER, |
| 51 | .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, |
| 52 | #ifdef LIBBPF_MAJOR_VERSION |
| 53 | .map_type = BPF_MAP_TYPE_PERCPU_HASH |
| 54 | #endif |
| 55 | }, |
| 56 | {.name = NULL, |
| 57 | .internal_input = 0, |
| 58 | .user_input = 0, |
| 59 | .type = NETDATA_EBPF_MAP_CONTROLLER, |
| 60 | .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, |
| 61 | #ifdef LIBBPF_MAJOR_VERSION |
| 62 | .map_type = BPF_MAP_TYPE_PERCPU_HASH |
| 63 | #endif |
| 64 | }}; |
| 65 | |
| 66 | ebpf_local_maps_t nfs_maps[] = { |
| 67 | {.name = "tbl_nfs", |
| 68 | .internal_input = NETDATA_KEY_CALLS_SYNC, |
| 69 | .user_input = 0, |
| 70 | .type = NETDATA_EBPF_MAP_STATIC, |
| 71 | .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, |
| 72 | #ifdef LIBBPF_MAJOR_VERSION |
| 73 | .map_type = BPF_MAP_TYPE_PERCPU_ARRAY |
| 74 | #endif |
| 75 | }, |
| 76 | {.name = "tmp_nfs", |
| 77 | .internal_input = NETDATA_FS_TEMP_MAP_SIZE, |
| 78 | .user_input = NETDATA_FS_TEMP_MAP_SIZE, |
| 79 | .type = NETDATA_EBPF_MAP_CONTROLLER, |
| 80 | .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, |
| 81 | #ifdef LIBBPF_MAJOR_VERSION |
| 82 | .map_type = BPF_MAP_TYPE_PERCPU_HASH |
| 83 | #endif |
| 84 | }, |
| 85 | {.name = NULL, |
| 86 | .internal_input = 0, |
| 87 | .user_input = 0, |
| 88 | .type = NETDATA_EBPF_MAP_CONTROLLER, |
| 89 | .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, |
| 90 | #ifdef LIBBPF_MAJOR_VERSION |
| 91 | .map_type = BPF_MAP_TYPE_PERCPU_HASH |
| 92 | #endif |
| 93 | }}; |
| 94 | |
| 95 | ebpf_local_maps_t zfs_maps[] = { |
| 96 | {.name = "tbl_zfs", |
| 97 | .internal_input = NETDATA_KEY_CALLS_SYNC, |
| 98 | .user_input = 0, |
| 99 | .type = NETDATA_EBPF_MAP_STATIC, |
| 100 | .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, |
| 101 | #ifdef LIBBPF_MAJOR_VERSION |
| 102 | .map_type = BPF_MAP_TYPE_PERCPU_ARRAY |
| 103 | #endif |
| 104 | }, |
| 105 | {.name = "tmp_zfs", |
| 106 | .internal_input = NETDATA_FS_TEMP_MAP_SIZE, |
| 107 | .user_input = NETDATA_FS_TEMP_MAP_SIZE, |
| 108 | .type = NETDATA_EBPF_MAP_CONTROLLER, |
| 109 | .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, |
| 110 | #ifdef LIBBPF_MAJOR_VERSION |
| 111 | .map_type = BPF_MAP_TYPE_PERCPU_HASH |
| 112 | #endif |
| 113 | }, |
| 114 | {.name = NULL, |
| 115 | .internal_input = 0, |
| 116 | .user_input = 0, |
| 117 | .type = NETDATA_EBPF_MAP_CONTROLLER, |
| 118 | .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, |
| 119 | #ifdef LIBBPF_MAJOR_VERSION |
| 120 | .map_type = BPF_MAP_TYPE_PERCPU_HASH |
| 121 | #endif |
| 122 | }}; |
| 123 | |
| 124 | ebpf_local_maps_t btrfs_maps[] = { |
| 125 | {.name = "tbl_btrfs", |
| 126 | .internal_input = NETDATA_KEY_CALLS_SYNC, |
| 127 | .user_input = 0, |
| 128 | .type = NETDATA_EBPF_MAP_STATIC, |
| 129 | .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, |
| 130 | #ifdef LIBBPF_MAJOR_VERSION |
| 131 | .map_type = BPF_MAP_TYPE_PERCPU_ARRAY |
| 132 | #endif |
| 133 | }, |
| 134 | {.name = "tbl_ext_addr", |
| 135 | .internal_input = 1, |
| 136 | .user_input = 1, |
| 137 | .type = NETDATA_EBPF_MAP_CONTROLLER, |
| 138 | .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, |
| 139 | #ifdef LIBBPF_MAJOR_VERSION |
| 140 | .map_type = BPF_MAP_TYPE_PERCPU_HASH |
| 141 | #endif |
| 142 | }, |
| 143 | {.name = "tmp_btrfs", |
| 144 | .internal_input = NETDATA_FS_TEMP_MAP_SIZE, |
| 145 | .user_input = NETDATA_FS_TEMP_MAP_SIZE, |
| 146 | .type = NETDATA_EBPF_MAP_CONTROLLER, |
| 147 | .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, |
| 148 | #ifdef LIBBPF_MAJOR_VERSION |
| 149 | .map_type = BPF_MAP_TYPE_PERCPU_HASH |
| 150 | #endif |
| 151 | }, |
| 152 | {.name = NULL, |
| 153 | .internal_input = 0, |
| 154 | .user_input = 0, |
| 155 | .type = NETDATA_EBPF_MAP_CONTROLLER, |
| 156 | .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, |
| 157 | #ifdef LIBBPF_MAJOR_VERSION |
| 158 | .map_type = BPF_MAP_TYPE_PERCPU_HASH |
| 159 | #endif |
| 160 | }}; |
| 161 | |
| 162 | static netdata_syscall_stat_t filesystem_aggregated_data[NETDATA_EBPF_HIST_MAX_BINS]; |
| 163 | static netdata_publish_syscall_t filesystem_publish_aggregated[NETDATA_EBPF_HIST_MAX_BINS]; |
| 164 | |
| 165 | char **dimensions = NULL; |
| 166 | static netdata_idx_t *filesystem_hash_values = NULL; |
| 167 | |
| 168 | #ifdef LIBBPF_MAJOR_VERSION |
| 169 | /** |
| 170 | * FS disable kprobe |
| 171 | * |
| 172 | * Disable kprobes, because system will use trampolines. |
| 173 | * We are not calling this function for while, because we are prioritizing kprobes. We opted by this road, because |
| 174 | * distribution are still not deliverying necessary btf files per FS. |
| 175 | * |
| 176 | * @param obj FS object loaded. |
| 177 | */ |
| 178 | static void ebpf_fs_disable_kprobe(struct filesystem_bpf *obj) |
| 179 | { |
| 180 | // kprobe |
| 181 | bpf_program__set_autoload(obj->progs.netdata_fs_file_read_probe, false); |
| 182 | bpf_program__set_autoload(obj->progs.netdata_fs_file_write_probe, false); |
| 183 | bpf_program__set_autoload(obj->progs.netdata_fs_file_open_probe, false); |
| 184 | bpf_program__set_autoload(obj->progs.netdata_fs_2nd_file_open_probe, false); |
| 185 | bpf_program__set_autoload(obj->progs.netdata_fs_getattr_probe, false); |
| 186 | // kretprobe |
| 187 | bpf_program__set_autoload(obj->progs.netdata_fs_file_read_retprobe, false); |
| 188 | bpf_program__set_autoload(obj->progs.netdata_fs_file_write_retprobe, false); |
| 189 | bpf_program__set_autoload(obj->progs.netdata_fs_file_open_retprobe, false); |
| 190 | bpf_program__set_autoload(obj->progs.netdata_fs_2nd_file_open_retprobe, false); |
| 191 | bpf_program__set_autoload(obj->progs.netdata_fs_getattr_retprobe, false); |
| 192 | } |
| 193 | |
| 194 | /** |
| 195 | * Disable trampoline |
| 196 | * |
| 197 | * Disable trampolines to use kprobes. |
| 198 | * |
| 199 | * @param obj FS object loaded. |
| 200 | */ |
| 201 | static void ebpf_fs_disable_trampoline(struct filesystem_bpf *obj) |
| 202 | { |
| 203 | // entry |
| 204 | bpf_program__set_autoload(obj->progs.netdata_fs_file_read_entry, false); |
| 205 | bpf_program__set_autoload(obj->progs.netdata_fs_file_write_entry, false); |
| 206 | bpf_program__set_autoload(obj->progs.netdata_fs_file_open_entry, false); |
| 207 | bpf_program__set_autoload(obj->progs.netdata_fs_getattr_entry, false); |
| 208 | bpf_program__set_autoload(obj->progs.netdata_fs_2nd_file_open_entry, false); |
| 209 | |
| 210 | // exit |
| 211 | bpf_program__set_autoload(obj->progs.netdata_fs_file_read_exit, false); |
| 212 | bpf_program__set_autoload(obj->progs.netdata_fs_file_write_exit, false); |
| 213 | bpf_program__set_autoload(obj->progs.netdata_fs_file_open_exit, false); |
| 214 | bpf_program__set_autoload(obj->progs.netdata_fs_getattr_exit, false); |
| 215 | bpf_program__set_autoload(obj->progs.netdata_fs_2nd_file_open_exit, false); |
| 216 | } |
| 217 | |
| 218 | /** |
| 219 | * Set targets |
| 220 | * |
| 221 | * Set targets for each objects. |
| 222 | * |
| 223 | * @param obj FS object loaded. |
| 224 | * @param functions array with function names. |
| 225 | */ |
| 226 | static void ebpf_fs_set_target(struct filesystem_bpf *obj, const char **functions) |
| 227 | { |
| 228 | // entry |
| 229 | bpf_program__set_attach_target(obj->progs.netdata_fs_file_read_entry, 0, functions[NETDATA_KEY_BTF_READ]); |
| 230 | bpf_program__set_attach_target(obj->progs.netdata_fs_file_write_entry, 0, functions[NETDATA_KEY_BTF_WRITE]); |
| 231 | bpf_program__set_attach_target(obj->progs.netdata_fs_file_open_entry, 0, functions[NETDATA_KEY_BTF_OPEN]); |
| 232 | bpf_program__set_attach_target(obj->progs.netdata_fs_getattr_entry, 0, functions[NETDATA_KEY_BTF_SYNC_ATTR]); |
| 233 | |
| 234 | // exit |
| 235 | bpf_program__set_attach_target(obj->progs.netdata_fs_file_read_exit, 0, functions[NETDATA_KEY_BTF_READ]); |
| 236 | bpf_program__set_attach_target(obj->progs.netdata_fs_file_write_exit, 0, functions[NETDATA_KEY_BTF_WRITE]); |
| 237 | bpf_program__set_attach_target(obj->progs.netdata_fs_file_open_exit, 0, functions[NETDATA_KEY_BTF_OPEN]); |
| 238 | bpf_program__set_attach_target(obj->progs.netdata_fs_getattr_exit, 0, functions[NETDATA_KEY_BTF_SYNC_ATTR]); |
| 239 | |
| 240 | if (functions[NETDATA_KEY_BTF_OPEN2]) { |
| 241 | bpf_program__set_attach_target(obj->progs.netdata_fs_2nd_file_open_entry, 0, functions[NETDATA_KEY_BTF_OPEN2]); |
| 242 | bpf_program__set_attach_target(obj->progs.netdata_fs_2nd_file_open_exit, 0, functions[NETDATA_KEY_BTF_OPEN2]); |
| 243 | } else { |
| 244 | bpf_program__set_autoload(obj->progs.netdata_fs_2nd_file_open_entry, false); |
| 245 | bpf_program__set_autoload(obj->progs.netdata_fs_2nd_file_open_exit, false); |
| 246 | } |
| 247 | } |
| 248 | |
| 249 | /** |
| 250 | * Attach Kprobe |
| 251 | * |
| 252 | * Attach kprobe on targets |
| 253 | * |
| 254 | * @param obj FS object loaded. |
| 255 | * @param functions array with function names. |
| 256 | */ |
| 257 | static int ebpf_fs_attach_kprobe(struct filesystem_bpf *obj, const char **functions) |
| 258 | { |
| 259 | // kprobe |
| 260 | obj->links.netdata_fs_file_read_probe = |
| 261 | bpf_program__attach_kprobe(obj->progs.netdata_fs_file_read_probe, false, functions[NETDATA_KEY_BTF_READ]); |
| 262 | if (libbpf_get_error(obj->links.netdata_fs_file_read_probe)) |
| 263 | return -1; |
| 264 | |
| 265 | obj->links.netdata_fs_file_write_probe = |
| 266 | bpf_program__attach_kprobe(obj->progs.netdata_fs_file_write_probe, false, functions[NETDATA_KEY_BTF_WRITE]); |
| 267 | if (libbpf_get_error(obj->links.netdata_fs_file_write_probe)) |
| 268 | goto cleanup_file_read; |
| 269 | |
| 270 | obj->links.netdata_fs_file_open_probe = |
| 271 | bpf_program__attach_kprobe(obj->progs.netdata_fs_file_open_probe, false, functions[NETDATA_KEY_BTF_OPEN]); |
| 272 | if (libbpf_get_error(obj->links.netdata_fs_file_open_probe)) |
| 273 | goto cleanup_file_write; |
| 274 | |
| 275 | obj->links.netdata_fs_getattr_probe = |
| 276 | bpf_program__attach_kprobe(obj->progs.netdata_fs_getattr_probe, false, functions[NETDATA_KEY_BTF_SYNC_ATTR]); |
| 277 | if (libbpf_get_error(obj->links.netdata_fs_getattr_probe)) |
| 278 | goto cleanup_file_open; |
| 279 | |
| 280 | // kretprobe |
| 281 | obj->links.netdata_fs_file_read_retprobe = |
| 282 | bpf_program__attach_kprobe(obj->progs.netdata_fs_file_read_retprobe, false, functions[NETDATA_KEY_BTF_READ]); |
| 283 | if (libbpf_get_error(obj->links.netdata_fs_file_read_retprobe)) |
| 284 | goto cleanup_getattr; |
| 285 | |
| 286 | obj->links.netdata_fs_file_write_retprobe = |
| 287 | bpf_program__attach_kprobe(obj->progs.netdata_fs_file_write_retprobe, false, functions[NETDATA_KEY_BTF_WRITE]); |
| 288 | if (libbpf_get_error(obj->links.netdata_fs_file_write_retprobe)) |
| 289 | goto cleanup_file_read_ret; |
| 290 | |
| 291 | obj->links.netdata_fs_file_open_retprobe = |
| 292 | bpf_program__attach_kprobe(obj->progs.netdata_fs_file_open_retprobe, false, functions[NETDATA_KEY_BTF_OPEN]); |
| 293 | if (libbpf_get_error(obj->links.netdata_fs_file_open_retprobe)) |
| 294 | goto cleanup_file_write_ret; |
| 295 | |
| 296 | obj->links.netdata_fs_getattr_retprobe = |
| 297 | bpf_program__attach_kprobe(obj->progs.netdata_fs_getattr_retprobe, false, functions[NETDATA_KEY_BTF_SYNC_ATTR]); |
| 298 | if (libbpf_get_error(obj->links.netdata_fs_getattr_retprobe)) |
| 299 | goto cleanup_file_open_ret; |
| 300 | |
| 301 | if (functions[NETDATA_KEY_BTF_OPEN2]) { |
| 302 | obj->links.netdata_fs_2nd_file_open_probe = bpf_program__attach_kprobe( |
| 303 | obj->progs.netdata_fs_2nd_file_open_probe, false, functions[NETDATA_KEY_BTF_OPEN2]); |
| 304 | if (libbpf_get_error(obj->links.netdata_fs_2nd_file_open_probe)) |
| 305 | goto cleanup_getattr_ret; |
| 306 | |
| 307 | obj->links.netdata_fs_2nd_file_open_retprobe = bpf_program__attach_kprobe( |
| 308 | obj->progs.netdata_fs_2nd_file_open_retprobe, false, functions[NETDATA_KEY_BTF_OPEN2]); |
| 309 | if (libbpf_get_error(obj->links.netdata_fs_2nd_file_open_retprobe)) |
| 310 | goto cleanup_2nd_open_probe; |
| 311 | } |
| 312 | |
| 313 | return 0; |
| 314 | |
| 315 | cleanup_2nd_open_probe: |
| 316 | if (obj->links.netdata_fs_2nd_file_open_probe) |
| 317 | bpf_link__destroy(obj->links.netdata_fs_2nd_file_open_probe); |
| 318 | |
| 319 | cleanup_getattr_ret: |
| 320 | if (obj->links.netdata_fs_getattr_retprobe) |
| 321 | bpf_link__destroy(obj->links.netdata_fs_getattr_retprobe); |
| 322 | |
| 323 | cleanup_file_open_ret: |
| 324 | if (obj->links.netdata_fs_file_open_retprobe) |
| 325 | bpf_link__destroy(obj->links.netdata_fs_file_open_retprobe); |
| 326 | |
| 327 | cleanup_file_write_ret: |
| 328 | if (obj->links.netdata_fs_file_write_retprobe) |
| 329 | bpf_link__destroy(obj->links.netdata_fs_file_write_retprobe); |
| 330 | |
| 331 | cleanup_file_read_ret: |
| 332 | if (obj->links.netdata_fs_file_read_retprobe) |
| 333 | bpf_link__destroy(obj->links.netdata_fs_file_read_retprobe); |
| 334 | |
| 335 | cleanup_getattr: |
| 336 | if (obj->links.netdata_fs_getattr_probe) |
| 337 | bpf_link__destroy(obj->links.netdata_fs_getattr_probe); |
| 338 | |
| 339 | cleanup_file_open: |
| 340 | if (obj->links.netdata_fs_file_open_probe) |
| 341 | bpf_link__destroy(obj->links.netdata_fs_file_open_probe); |
| 342 | |
| 343 | cleanup_file_write: |
| 344 | if (obj->links.netdata_fs_file_write_probe) |
| 345 | bpf_link__destroy(obj->links.netdata_fs_file_write_probe); |
| 346 | |
| 347 | cleanup_file_read: |
| 348 | if (obj->links.netdata_fs_file_read_probe) |
| 349 | bpf_link__destroy(obj->links.netdata_fs_file_read_probe); |
| 350 | |
| 351 | return -1; |
| 352 | } |
| 353 | |
| 354 | /** |
| 355 | * Load and Attach |
| 356 | * |
| 357 | * Load binary and attach to targets. |
| 358 | * |
| 359 | * @param map Structure with information about maps. |
| 360 | * @param obj FS object loaded. |
| 361 | * @param functions array with function names. |
| 362 | * @param bf sttruct with btf file loaded. |
| 363 | */ |
| 364 | static inline int |
| 365 | ebpf_fs_load_and_attach(ebpf_local_maps_t *map, struct filesystem_bpf *obj, const char **functions, struct btf *bf) |
| 366 | { |
| 367 | if (bf) { |
| 368 | ebpf_fs_disable_kprobe(obj); |
| 369 | ebpf_fs_set_target(obj, functions); |
| 370 | } else { |
| 371 | ebpf_fs_disable_trampoline(obj); |
| 372 | } |
| 373 | |
| 374 | int ret = filesystem_bpf__load(obj); |
| 375 | if (ret) { |
| 376 | fprintf(stderr, "failed to load BPF object: %d\n", ret); |
| 377 | return -1; |
| 378 | } |
| 379 | |
| 380 | if (bf) |
| 381 | ret = filesystem_bpf__attach(obj); |
| 382 | else |
| 383 | ret = ebpf_fs_attach_kprobe(obj, functions); |
| 384 | |
| 385 | if (!ret) |
| 386 | map->map_fd = bpf_map__fd(obj->maps.tbl_fs); |
| 387 | |
| 388 | return ret; |
| 389 | } |
| 390 | #endif |
| 391 | |
| 392 | /***************************************************************** |
| 393 | * |
| 394 | * COMMON FUNCTIONS |
| 395 | * |
| 396 | *****************************************************************/ |
| 397 | |
| 398 | static void ebpf_cleanup_fs_histogram(netdata_ebpf_histogram_t *hist) |
| 399 | { |
| 400 | freez(hist->name); |
| 401 | hist->name = NULL; |
| 402 | freez(hist->title); |
| 403 | hist->title = NULL; |
| 404 | freez(hist->ctx); |
| 405 | hist->ctx = NULL; |
| 406 | } |
| 407 | |
| 408 | static void ebpf_cleanup_fs_partition(ebpf_filesystem_partitions_t *efp) |
| 409 | { |
| 410 | ebpf_cleanup_fs_histogram(&efp->hread); |
| 411 | ebpf_cleanup_fs_histogram(&efp->hwrite); |
| 412 | ebpf_cleanup_fs_histogram(&efp->hopen); |
| 413 | ebpf_cleanup_fs_histogram(&efp->hadditional); |
| 414 | freez(efp->family_name); |
| 415 | efp->family_name = NULL; |
| 416 | } |
| 417 | |
| 418 | /** |
| 419 | * Create Filesystem chart |
| 420 | * |
| 421 | * Create latency charts |
| 422 | * |
| 423 | * @param update_every value to overwrite the update frequency set by the server. |
| 424 | */ |
| 425 | static void ebpf_obsolete_fs_charts(int update_every) |
| 426 | { |
| 427 | int i; |
| 428 | uint32_t test = NETDATA_FILESYSTEM_FLAG_CHART_CREATED | NETDATA_FILESYSTEM_REMOVE_CHARTS; |
| 429 | for (i = 0; localfs[i].filesystem; i++) { |
| 430 | ebpf_filesystem_partitions_t *efp = &localfs[i]; |
| 431 | uint32_t flags = efp->flags; |
| 432 | if ((flags & test) == test) { |
| 433 | flags &= ~test; |
| 434 | |
| 435 | ebpf_write_chart_obsolete( |
| 436 | NETDATA_FILESYSTEM_FAMILY, |
| 437 | efp->hread.name, |
| 438 | "", |
| 439 | efp->hread.title, |
| 440 | EBPF_COMMON_UNITS_CALLS_PER_SEC, |
| 441 | efp->family_name, |
| 442 | NULL, |
| 443 | NETDATA_EBPF_CHART_TYPE_STACKED, |
| 444 | efp->hread.order, |
| 445 | update_every); |
| 446 | |
| 447 | ebpf_write_chart_obsolete( |
| 448 | NETDATA_FILESYSTEM_FAMILY, |
| 449 | efp->hwrite.name, |
| 450 | "", |
| 451 | efp->hwrite.title, |
| 452 | EBPF_COMMON_UNITS_CALLS_PER_SEC, |
| 453 | efp->family_name, |
| 454 | NULL, |
| 455 | NETDATA_EBPF_CHART_TYPE_STACKED, |
| 456 | efp->hwrite.order, |
| 457 | update_every); |
| 458 | |
| 459 | ebpf_write_chart_obsolete( |
| 460 | NETDATA_FILESYSTEM_FAMILY, |
| 461 | efp->hopen.name, |
| 462 | "", |
| 463 | efp->hopen.title, |
| 464 | EBPF_COMMON_UNITS_CALLS_PER_SEC, |
| 465 | efp->family_name, |
| 466 | NULL, |
| 467 | NETDATA_EBPF_CHART_TYPE_STACKED, |
| 468 | efp->hopen.order, |
| 469 | update_every); |
| 470 | |
| 471 | ebpf_write_chart_obsolete( |
| 472 | NETDATA_FILESYSTEM_FAMILY, |
| 473 | efp->hadditional.name, |
| 474 | "", |
| 475 | efp->hadditional.title, |
| 476 | EBPF_COMMON_UNITS_CALLS_PER_SEC, |
| 477 | efp->family_name, |
| 478 | NULL, |
| 479 | NETDATA_EBPF_CHART_TYPE_STACKED, |
| 480 | efp->hadditional.order, |
| 481 | update_every); |
| 482 | |
| 483 | ebpf_cleanup_fs_partition(efp); |
| 484 | } |
| 485 | efp->flags = flags; |
| 486 | } |
| 487 | } |
| 488 | |
| 489 | /** |
| 490 | * Create Filesystem chart |
| 491 | * |
| 492 | * Create latency charts |
| 493 | * |
| 494 | * @param update_every value to overwrite the update frequency set by the server. |
| 495 | */ |
| 496 | static void ebpf_create_fs_charts(int update_every) |
| 497 | { |
| 498 | static int order = NETDATA_CHART_PRIO_EBPF_FILESYSTEM_CHARTS; |
| 499 | char chart_name[64], title[256], family[64], ctx[64]; |
| 500 | int i; |
| 501 | uint32_t test = NETDATA_FILESYSTEM_FLAG_CHART_CREATED | NETDATA_FILESYSTEM_REMOVE_CHARTS; |
| 502 | for (i = 0; localfs[i].filesystem; i++) { |
| 503 | ebpf_filesystem_partitions_t *efp = &localfs[i]; |
| 504 | uint32_t flags = efp->flags; |
| 505 | if (flags & NETDATA_FILESYSTEM_FLAG_HAS_PARTITION && !(flags & test)) { |
| 506 | snprintfz(title, sizeof(title) - 1, "%s latency for each read request.", efp->filesystem); |
| 507 | snprintfz(family, sizeof(family) - 1, "%s_latency", efp->family); |
| 508 | snprintfz(chart_name, sizeof(chart_name) - 1, "%s_read_latency", efp->filesystem); |
| 509 | snprintfz(ctx, sizeof(ctx) - 1, "filesystem.read_latency"); |
| 510 | efp->hread.name = strdupz(chart_name); |
| 511 | efp->hread.title = strdupz(title); |
| 512 | efp->hread.ctx = strdupz(ctx); |
| 513 | efp->hread.order = order; |
| 514 | efp->family_name = strdupz(family); |
| 515 | |
| 516 | ebpf_create_chart( |
| 517 | NETDATA_FILESYSTEM_FAMILY, |
| 518 | efp->hread.name, |
| 519 | efp->hread.title, |
| 520 | EBPF_COMMON_UNITS_CALLS_PER_SEC, |
| 521 | efp->family_name, |
| 522 | "filesystem.read_latency", |
| 523 | NETDATA_EBPF_CHART_TYPE_STACKED, |
| 524 | order, |
| 525 | ebpf_create_global_dimension, |
| 526 | filesystem_publish_aggregated, |
| 527 | NETDATA_EBPF_HIST_MAX_BINS, |
| 528 | update_every, |
| 529 | NETDATA_EBPF_MODULE_NAME_FILESYSTEM); |
| 530 | order++; |
| 531 | |
| 532 | snprintfz(title, sizeof(title) - 1, "%s latency for each write request.", efp->filesystem); |
| 533 | snprintfz(chart_name, sizeof(chart_name) - 1, "%s_write_latency", efp->filesystem); |
| 534 | snprintfz(ctx, sizeof(ctx) - 1, "filesystem.write_latency"); |
| 535 | efp->hwrite.name = strdupz(chart_name); |
| 536 | efp->hwrite.title = strdupz(title); |
| 537 | efp->hwrite.ctx = strdupz(ctx); |
| 538 | efp->hwrite.order = order; |
| 539 | ebpf_create_chart( |
| 540 | NETDATA_FILESYSTEM_FAMILY, |
| 541 | efp->hwrite.name, |
| 542 | efp->hwrite.title, |
| 543 | EBPF_COMMON_UNITS_CALLS_PER_SEC, |
| 544 | efp->family_name, |
| 545 | "filesystem.write_latency", |
| 546 | NETDATA_EBPF_CHART_TYPE_STACKED, |
| 547 | order, |
| 548 | ebpf_create_global_dimension, |
| 549 | filesystem_publish_aggregated, |
| 550 | NETDATA_EBPF_HIST_MAX_BINS, |
| 551 | update_every, |
| 552 | NETDATA_EBPF_MODULE_NAME_FILESYSTEM); |
| 553 | order++; |
| 554 | |
| 555 | snprintfz(title, sizeof(title) - 1, "%s latency for each open request.", efp->filesystem); |
| 556 | snprintfz(chart_name, sizeof(chart_name) - 1, "%s_open_latency", efp->filesystem); |
| 557 | snprintfz(ctx, sizeof(ctx) - 1, "filesystem.open_latency"); |
| 558 | efp->hopen.name = strdupz(chart_name); |
| 559 | efp->hopen.title = strdupz(title); |
| 560 | efp->hopen.ctx = strdupz(ctx); |
| 561 | efp->hopen.order = order; |
| 562 | ebpf_create_chart( |
| 563 | NETDATA_FILESYSTEM_FAMILY, |
| 564 | efp->hopen.name, |
| 565 | efp->hopen.title, |
| 566 | EBPF_COMMON_UNITS_CALLS_PER_SEC, |
| 567 | efp->family_name, |
| 568 | "filesystem.open_latency", |
| 569 | NETDATA_EBPF_CHART_TYPE_STACKED, |
| 570 | order, |
| 571 | ebpf_create_global_dimension, |
| 572 | filesystem_publish_aggregated, |
| 573 | NETDATA_EBPF_HIST_MAX_BINS, |
| 574 | update_every, |
| 575 | NETDATA_EBPF_MODULE_NAME_FILESYSTEM); |
| 576 | order++; |
| 577 | |
| 578 | char *type = (efp->flags & NETDATA_FILESYSTEM_ATTR_CHARTS) ? "attribute" : "sync"; |
| 579 | snprintfz(title, sizeof(title) - 1, "%s latency for each %s request.", efp->filesystem, type); |
| 580 | snprintfz(chart_name, sizeof(chart_name) - 1, "%s_%s_latency", efp->filesystem, type); |
| 581 | snprintfz(ctx, sizeof(ctx) - 1, "filesystem.%s_latency", efp->filesystem); |
| 582 | efp->hadditional.name = strdupz(chart_name); |
| 583 | efp->hadditional.title = strdupz(title); |
| 584 | efp->hadditional.ctx = strdupz(ctx); |
| 585 | efp->hadditional.order = order; |
| 586 | ebpf_create_chart( |
| 587 | NETDATA_FILESYSTEM_FAMILY, |
| 588 | efp->hadditional.name, |
| 589 | efp->hadditional.title, |
| 590 | EBPF_COMMON_UNITS_CALLS_PER_SEC, |
| 591 | efp->family_name, |
| 592 | ctx, |
| 593 | NETDATA_EBPF_CHART_TYPE_STACKED, |
| 594 | order, |
| 595 | ebpf_create_global_dimension, |
| 596 | filesystem_publish_aggregated, |
| 597 | NETDATA_EBPF_HIST_MAX_BINS, |
| 598 | update_every, |
| 599 | NETDATA_EBPF_MODULE_NAME_FILESYSTEM); |
| 600 | order++; |
| 601 | efp->flags |= NETDATA_FILESYSTEM_FLAG_CHART_CREATED; |
| 602 | } |
| 603 | } |
| 604 | |
| 605 | fflush(stdout); |
| 606 | } |
| 607 | |
| 608 | /** |
| 609 | * Initialize eBPF data |
| 610 | * |
| 611 | * @param em main thread structure. |
| 612 | * |
| 613 | * @return it returns 0 on success and -1 otherwise. |
| 614 | */ |
| 615 | int ebpf_filesystem_initialize_ebpf_data(ebpf_module_t *em) |
| 616 | { |
| 617 | netdata_mutex_lock(&lock); |
| 618 | int i; |
| 619 | const char *saved_name = em->info.thread_name; |
| 620 | uint64_t kernels = em->kernels; |
| 621 | bool loaded_any = false; |
| 622 | for (i = 0; localfs[i].filesystem; i++) { |
| 623 | ebpf_filesystem_partitions_t *efp = &localfs[i]; |
| 624 | if (efp->flags & NETDATA_FILESYSTEM_FLAG_HAS_PARTITION) |
| 625 | loaded_any = true; |
| 626 | |
| 627 | if (efp->load_failed) |
| 628 | continue; |
| 629 | |
| 630 | if (!efp->probe_links && efp->flags & NETDATA_FILESYSTEM_LOAD_EBPF_PROGRAM) { |
| 631 | em->info.thread_name = efp->filesystem; |
| 632 | em->kernels = efp->kernels; |
| 633 | em->maps = efp->fs_maps; |
| 634 | #ifdef LIBBPF_MAJOR_VERSION |
| 635 | ebpf_define_map_type(em->maps, em->maps_per_core, running_on_kernel); |
| 636 | #endif |
| 637 | if (em->load & EBPF_LOAD_LEGACY) { |
| 638 | efp->probe_links = ebpf_load_program(ebpf_plugin_dir, em, running_on_kernel, isrh, &efp->objects); |
| 639 | if (!efp->probe_links) { |
| 640 | efp->load_failed = true; |
| 641 | em->info.thread_name = saved_name; |
| 642 | em->kernels = kernels; |
| 643 | em->maps = NULL; |
| 644 | continue; |
| 645 | } |
| 646 | } |
| 647 | #ifdef LIBBPF_MAJOR_VERSION |
| 648 | else { |
| 649 | efp->fs_obj = filesystem_bpf__open(); |
| 650 | if (!efp->fs_obj) { |
| 651 | efp->load_failed = true; |
| 652 | em->info.thread_name = saved_name; |
| 653 | em->kernels = kernels; |
| 654 | em->maps = NULL; |
| 655 | continue; |
| 656 | } else if (ebpf_fs_load_and_attach(em->maps, efp->fs_obj, efp->functions, NULL)) { |
| 657 | efp->load_failed = true; |
| 658 | filesystem_bpf__destroy(efp->fs_obj); |
| 659 | efp->fs_obj = NULL; |
| 660 | em->info.thread_name = saved_name; |
| 661 | em->kernels = kernels; |
| 662 | em->maps = NULL; |
| 663 | continue; |
| 664 | } |
| 665 | } |
| 666 | #endif |
| 667 | efp->flags |= NETDATA_FILESYSTEM_FLAG_HAS_PARTITION; |
| 668 | loaded_any = true; |
| 669 | ebpf_mark_program_loaded(); |
| 670 | ebpf_update_kernel_memory(&plugin_statistics, efp->fs_maps, EBPF_ACTION_STAT_ADD); |
| 671 | |
| 672 | // Needed for filesystems like btrfs |
| 673 | if ((efp->flags & NETDATA_FILESYSTEM_FILL_ADDRESS_TABLE) && (efp->addresses.function)) { |
| 674 | if (efp->fs_maps && efp->fs_maps[NETDATA_ADDR_FS_TABLE].map_fd >= 0) |
| 675 | ebpf_load_addresses(&efp->addresses, efp->fs_maps[NETDATA_ADDR_FS_TABLE].map_fd); |
| 676 | } |
| 677 | } |
| 678 | efp->flags &= ~NETDATA_FILESYSTEM_LOAD_EBPF_PROGRAM; |
| 679 | } |
| 680 | em->info.thread_name = saved_name; |
| 681 | netdata_mutex_unlock(&lock); |
| 682 | em->kernels = kernels; |
| 683 | em->maps = NULL; |
| 684 | |
| 685 | if (!dimensions) { |
| 686 | dimensions = ebpf_fill_histogram_dimension(NETDATA_EBPF_HIST_MAX_BINS); |
| 687 | |
| 688 | memset(filesystem_aggregated_data, 0, NETDATA_EBPF_HIST_MAX_BINS * sizeof(netdata_syscall_stat_t)); |
| 689 | memset(filesystem_publish_aggregated, 0, NETDATA_EBPF_HIST_MAX_BINS * sizeof(netdata_publish_syscall_t)); |
| 690 | |
| 691 | filesystem_hash_values = callocz(ebpf_nprocs, sizeof(netdata_idx_t)); |
| 692 | } |
| 693 | |
| 694 | return loaded_any ? 0 : -1; |
| 695 | } |
| 696 | |
| 697 | /** |
| 698 | * Read Local partitions |
| 699 | * |
| 700 | * @return the total of partitions that will be monitored |
| 701 | */ |
| 702 | static int ebpf_read_local_partitions(void) |
| 703 | { |
| 704 | char filename[FILENAME_MAX + 1]; |
| 705 | snprintfz(filename, FILENAME_MAX, "%s/proc/self/mountinfo", netdata_configured_host_prefix); |
| 706 | procfile *ff = procfile_open(filename, " \t", PROCFILE_FLAG_DEFAULT); |
| 707 | if (unlikely(!ff)) { |
| 708 | snprintfz(filename, FILENAME_MAX, "%s/proc/1/mountinfo", netdata_configured_host_prefix); |
| 709 | ff = procfile_open(filename, " \t", PROCFILE_FLAG_DEFAULT); |
| 710 | if (unlikely(!ff)) |
| 711 | return 0; |
| 712 | } |
| 713 | |
| 714 | ff = procfile_readall(ff); |
| 715 | if (unlikely(!ff)) |
| 716 | return 0; |
| 717 | |
| 718 | int count = 0; |
| 719 | unsigned long l, i, lines = procfile_lines(ff); |
| 720 | for (i = 0; localfs[i].filesystem; i++) { |
| 721 | localfs[i].flags |= NETDATA_FILESYSTEM_REMOVE_CHARTS; |
| 722 | } |
| 723 | |
| 724 | for (l = 0; l < lines; l++) { |
| 725 | // In "normal" situation the expected value is at column 7 |
| 726 | // When `shared` options is added to mount information, the filesystem is at column 8 |
| 727 | // Finally when we have systemd starting netdata, it will be at column 9 |
| 728 | unsigned long index = procfile_linewords(ff, l) - 3; |
| 729 | |
| 730 | char *fs = procfile_lineword(ff, l, index); |
| 731 | |
| 732 | for (i = 0; localfs[i].filesystem; i++) { |
| 733 | ebpf_filesystem_partitions_t *w = &localfs[i]; |
| 734 | if (w->enabled && |
| 735 | (!strcmp(fs, w->filesystem) || (w->optional_filesystem && !strcmp(fs, w->optional_filesystem)))) { |
| 736 | if (!(localfs[i].flags & NETDATA_FILESYSTEM_FLAG_CHART_CREATED)) |
| 737 | localfs[i].flags |= NETDATA_FILESYSTEM_LOAD_EBPF_PROGRAM; |
| 738 | |
| 739 | localfs[i].flags &= ~NETDATA_FILESYSTEM_REMOVE_CHARTS; |
| 740 | count++; |
| 741 | break; |
| 742 | } |
| 743 | } |
| 744 | } |
| 745 | procfile_close(ff); |
| 746 | |
| 747 | return count; |
| 748 | } |
| 749 | |
| 750 | /** |
| 751 | * Update partition |
| 752 | * |
| 753 | * Update the partition structures before to plot |
| 754 | * |
| 755 | * @param em main thread structure |
| 756 | * |
| 757 | * @return 0 on success and -1 otherwise. |
| 758 | */ |
| 759 | static int ebpf_update_partitions(ebpf_module_t *em) |
| 760 | { |
| 761 | static time_t update_every = 0; |
| 762 | time_t curr = now_realtime_sec(); |
| 763 | if (curr < update_every) |
| 764 | return 0; |
| 765 | |
| 766 | update_every = curr + (NETDATA_PARTITION_UPDATE_INTERVAL_MULTIPLIER * em->update_every); |
| 767 | if (!ebpf_read_local_partitions()) { |
| 768 | em->optional = -1; |
| 769 | return -1; |
| 770 | } |
| 771 | |
| 772 | if (ebpf_filesystem_initialize_ebpf_data(em)) { |
| 773 | return -1; |
| 774 | } |
| 775 | |
| 776 | return 0; |
| 777 | } |
| 778 | |
| 779 | /***************************************************************** |
| 780 | * |
| 781 | * CLEANUP FUNCTIONS |
| 782 | * |
| 783 | *****************************************************************/ |
| 784 | |
| 785 | /* |
| 786 | * Cleanup eBPF data |
| 787 | */ |
| 788 | void ebpf_filesystem_cleanup_ebpf_data(void) |
| 789 | { |
| 790 | int i; |
| 791 | for (i = 0; localfs[i].filesystem; i++) { |
| 792 | ebpf_filesystem_partitions_t *efp = &localfs[i]; |
| 793 | if (efp->probe_links) |
| 794 | ebpf_cleanup_fs_partition(efp); |
| 795 | } |
| 796 | } |
| 797 | |
| 798 | /** |
| 799 | * Obsolete global |
| 800 | * |
| 801 | * Obsolete global charts created by thread. |
| 802 | * |
| 803 | * @param em a pointer to `struct ebpf_module` |
| 804 | */ |
| 805 | static void ebpf_obsolete_filesystem_global(ebpf_module_t *em) |
| 806 | { |
| 807 | int i; |
| 808 | for (i = 0; localfs[i].filesystem; i++) { |
| 809 | ebpf_filesystem_partitions_t *efp = &localfs[i]; |
| 810 | if (!efp->objects) |
| 811 | continue; |
| 812 | |
| 813 | if (!(efp->flags & NETDATA_FILESYSTEM_FLAG_CHART_CREATED)) |
| 814 | continue; |
| 815 | |
| 816 | ebpf_write_chart_obsolete( |
| 817 | NETDATA_FILESYSTEM_FAMILY, |
| 818 | efp->hread.name, |
| 819 | "", |
| 820 | efp->hread.title, |
| 821 | EBPF_COMMON_UNITS_CALLS_PER_SEC, |
| 822 | efp->family_name, |
| 823 | NETDATA_EBPF_CHART_TYPE_STACKED, |
| 824 | "filesystem.read_latency", |
| 825 | efp->hread.order, |
| 826 | em->update_every); |
| 827 | ebpf_cleanup_fs_histogram(&efp->hread); |
| 828 | |
| 829 | ebpf_write_chart_obsolete( |
| 830 | NETDATA_FILESYSTEM_FAMILY, |
| 831 | efp->hwrite.name, |
| 832 | "", |
| 833 | efp->hwrite.title, |
| 834 | EBPF_COMMON_UNITS_CALLS_PER_SEC, |
| 835 | efp->family_name, |
| 836 | NETDATA_EBPF_CHART_TYPE_STACKED, |
| 837 | "filesystem.write_latency", |
| 838 | efp->hwrite.order, |
| 839 | em->update_every); |
| 840 | ebpf_cleanup_fs_histogram(&efp->hwrite); |
| 841 | |
| 842 | ebpf_write_chart_obsolete( |
| 843 | NETDATA_FILESYSTEM_FAMILY, |
| 844 | efp->hopen.name, |
| 845 | "", |
| 846 | efp->hopen.title, |
| 847 | EBPF_COMMON_UNITS_CALLS_PER_SEC, |
| 848 | efp->family_name, |
| 849 | NETDATA_EBPF_CHART_TYPE_STACKED, |
| 850 | "filesystem.open_latency", |
| 851 | efp->hopen.order, |
| 852 | em->update_every); |
| 853 | ebpf_cleanup_fs_histogram(&efp->hopen); |
| 854 | |
| 855 | ebpf_write_chart_obsolete( |
| 856 | NETDATA_FILESYSTEM_FAMILY, |
| 857 | efp->hadditional.name, |
| 858 | "", |
| 859 | efp->hadditional.title, |
| 860 | EBPF_COMMON_UNITS_CALLS_PER_SEC, |
| 861 | efp->family_name, |
| 862 | NETDATA_EBPF_CHART_TYPE_STACKED, |
| 863 | efp->hadditional.ctx, |
| 864 | efp->hadditional.order, |
| 865 | em->update_every); |
| 866 | ebpf_cleanup_fs_histogram(&efp->hadditional); |
| 867 | |
| 868 | efp->flags = NETDATA_FILESYSTEM_FLAG_NO_PARTITION; |
| 869 | } |
| 870 | } |
| 871 | |
| 872 | /** |
| 873 | * Filesystem exit |
| 874 | * |
| 875 | * Cancel child thread. |
| 876 | * |
| 877 | * @param ptr thread data. |
| 878 | */ |
| 879 | void ebpf_filesystem_unload_bpf(ebpf_module_t *em) |
| 880 | { |
| 881 | int i; |
| 882 | for (i = 0; localfs[i].filesystem; i++) { |
| 883 | ebpf_filesystem_partitions_t *efp = &localfs[i]; |
| 884 | #ifdef LIBBPF_MAJOR_VERSION |
| 885 | if (efp->fs_obj) { |
| 886 | filesystem_bpf__destroy(efp->fs_obj); |
| 887 | efp->fs_obj = NULL; |
| 888 | efp->flags = NETDATA_FILESYSTEM_FLAG_NO_PARTITION; |
| 889 | } |
| 890 | #endif |
| 891 | if ((em->load & EBPF_LOAD_LEGACY) && efp->probe_links) { |
| 892 | ebpf_unload_legacy_code(efp->objects, efp->probe_links); |
| 893 | efp->objects = NULL; |
| 894 | efp->probe_links = NULL; |
| 895 | efp->flags = NETDATA_FILESYSTEM_FLAG_NO_PARTITION; |
| 896 | } |
| 897 | } |
| 898 | } |
| 899 | |
| 900 | static void ebpf_filesystem_exit(void *pptr) |
| 901 | { |
| 902 | ebpf_module_t *em = CLEANUP_FUNCTION_GET_PTR(pptr); |
| 903 | if (!em) |
| 904 | return; |
| 905 | |
| 906 | int i; |
| 907 | bool has_resources = false; |
| 908 | for (i = 0; localfs[i].filesystem; i++) { |
| 909 | ebpf_filesystem_partitions_t *efp = &localfs[i]; |
| 910 | if (efp->probe_links || efp->objects || efp->fs_obj) { |
| 911 | has_resources = true; |
| 912 | break; |
| 913 | } |
| 914 | } |
| 915 | if (!dimensions && !filesystem_hash_values && !has_resources) { |
| 916 | netdata_mutex_lock(&ebpf_exit_cleanup); |
| 917 | ebpf_module_enabled_set(em, NETDATA_THREAD_EBPF_STOPPED); |
| 918 | netdata_mutex_unlock(&ebpf_exit_cleanup); |
| 919 | return; |
| 920 | } |
| 921 | |
| 922 | if (ebpf_module_enabled_get(em) == NETDATA_THREAD_EBPF_FUNCTION_RUNNING && !ebpf_plugin_stop()) { |
| 923 | netdata_mutex_lock(&lock); |
| 924 | ebpf_obsolete_filesystem_global(em); |
| 925 | |
| 926 | fflush(stdout); |
| 927 | netdata_mutex_unlock(&lock); |
| 928 | } |
| 929 | |
| 930 | ebpf_filesystem_cleanup_ebpf_data(); |
| 931 | if (dimensions) { |
| 932 | ebpf_histogram_dimension_cleanup(dimensions, NETDATA_EBPF_HIST_MAX_BINS); |
| 933 | dimensions = NULL; |
| 934 | } |
| 935 | |
| 936 | freez(filesystem_hash_values); |
| 937 | |
| 938 | if (!ebpf_plugin_stop() && em->functions.bpf_unload) |
| 939 | em->functions.bpf_unload(em); |
| 940 | |
| 941 | netdata_mutex_lock(&ebpf_exit_cleanup); |
| 942 | ebpf_module_enabled_set(em, NETDATA_THREAD_EBPF_STOPPED); |
| 943 | netdata_mutex_unlock(&ebpf_exit_cleanup); |
| 944 | } |
| 945 | |
| 946 | /***************************************************************** |
| 947 | * |
| 948 | * MAIN THREAD |
| 949 | * |
| 950 | *****************************************************************/ |
| 951 | |
| 952 | /** |
| 953 | * Select histogram |
| 954 | * |
| 955 | * Select histogram based on operation type |
| 956 | * |
| 957 | * @param efp pointer to filesystem partition |
| 958 | * @param id histogram selector |
| 959 | * |
| 960 | * @return pointer to histogram and sets idx |
| 961 | */ |
| 962 | static inline netdata_ebpf_histogram_t *select_hist(ebpf_filesystem_partitions_t *efp, uint32_t *idx, uint32_t id) |
| 963 | { |
| 964 | uint32_t hist_idx = id / NETDATA_FS_HISTOGRAM_BINS; |
| 965 | if (hist_idx >= 4) |
| 966 | return NULL; |
| 967 | |
| 968 | *idx = id % NETDATA_FS_HISTOGRAM_BINS; |
| 969 | |
| 970 | switch (hist_idx) { |
| 971 | case 0: |
| 972 | return &efp->hread; |
| 973 | case 1: |
| 974 | return &efp->hwrite; |
| 975 | case 2: |
| 976 | return &efp->hopen; |
| 977 | default: |
| 978 | return &efp->hadditional; |
| 979 | } |
| 980 | } |
| 981 | |
| 982 | /** |
| 983 | * Read filesystem table |
| 984 | * |
| 985 | * @param efp structure with filesystem monitored |
| 986 | * @param fd file descriptor to get data. |
| 987 | * @param maps_per_core do I need to read all cores? |
| 988 | * |
| 989 | * Read the table with number of calls for all functions |
| 990 | */ |
| 991 | static void read_filesystem_table(ebpf_filesystem_partitions_t *efp, int fd, int maps_per_core) |
| 992 | { |
| 993 | if (!efp || !efp->fs_maps) |
| 994 | return; |
| 995 | |
| 996 | netdata_idx_t *values = filesystem_hash_values; |
| 997 | uint32_t key; |
| 998 | uint32_t idx; |
| 999 | for (key = 0; key < NETDATA_KEY_CALLS_SYNC; key++) { |
| 1000 | netdata_ebpf_histogram_t *w = select_hist(efp, &idx, key); |
| 1001 | if (!w) { |
| 1002 | continue; |
| 1003 | } |
| 1004 | |
| 1005 | int test = bpf_map_lookup_elem(fd, &key, values); |
| 1006 | if (test < 0) { |
| 1007 | continue; |
| 1008 | } |
| 1009 | |
| 1010 | uint64_t total = 0; |
| 1011 | int i; |
| 1012 | int end = (maps_per_core) ? ebpf_nprocs : 1; |
| 1013 | for (i = 0; i < end; i++) { |
| 1014 | total += values[i]; |
| 1015 | } |
| 1016 | |
| 1017 | if (idx >= NETDATA_EBPF_HIST_MAX_BINS) |
| 1018 | idx = NETDATA_EBPF_HIST_MAX_BINS - 1; |
| 1019 | w->histogram[idx] = total; |
| 1020 | } |
| 1021 | } |
| 1022 | |
| 1023 | /** |
| 1024 | * Read filesystem table |
| 1025 | * |
| 1026 | * Read the table with number of calls for all functions |
| 1027 | * |
| 1028 | * @param maps_per_core do I need to read all cores? |
| 1029 | */ |
| 1030 | static void read_filesystem_tables(int maps_per_core) |
| 1031 | { |
| 1032 | int i; |
| 1033 | for (i = 0; localfs[i].filesystem; i++) { |
| 1034 | ebpf_filesystem_partitions_t *efp = &localfs[i]; |
| 1035 | if (efp->flags & NETDATA_FILESYSTEM_FLAG_HAS_PARTITION && efp->fs_maps) { |
| 1036 | read_filesystem_table(efp, efp->fs_maps[NETDATA_MAIN_FS_TABLE].map_fd, maps_per_core); |
| 1037 | } |
| 1038 | } |
| 1039 | } |
| 1040 | |
| 1041 | /** |
| 1042 | * Filesystem read hash |
| 1043 | * |
| 1044 | * This is the thread callback. |
| 1045 | * This thread is necessary, because we cannot freeze the whole plugin to read the data on very busy filesystem. |
| 1046 | * |
| 1047 | * @param ptr It is a NULL value for this thread. |
| 1048 | * |
| 1049 | * @return It always returns NULL. |
| 1050 | */ |
| 1051 | void ebpf_filesystem_read_hash(ebpf_module_t *em) |
| 1052 | { |
| 1053 | (void)ebpf_update_partitions(em); |
| 1054 | |
| 1055 | ebpf_obsolete_fs_charts(em->update_every); |
| 1056 | |
| 1057 | if (em->optional) |
| 1058 | return; |
| 1059 | |
| 1060 | read_filesystem_tables(em->maps_per_core); |
| 1061 | } |
| 1062 | |
| 1063 | /** |
| 1064 | * Send Hard disk data |
| 1065 | * |
| 1066 | * Send hard disk information to Netdata. |
| 1067 | */ |
| 1068 | static void ebpf_histogram_send_data(void) |
| 1069 | { |
| 1070 | uint32_t i; |
| 1071 | uint32_t test = NETDATA_FILESYSTEM_FLAG_HAS_PARTITION | NETDATA_FILESYSTEM_REMOVE_CHARTS; |
| 1072 | for (i = 0; localfs[i].filesystem; i++) { |
| 1073 | ebpf_filesystem_partitions_t *efp = &localfs[i]; |
| 1074 | if ((efp->flags & test) == NETDATA_FILESYSTEM_FLAG_HAS_PARTITION) { |
| 1075 | write_histogram_chart( |
| 1076 | NETDATA_FILESYSTEM_FAMILY, |
| 1077 | efp->hread.name, |
| 1078 | efp->hread.histogram, |
| 1079 | dimensions, |
| 1080 | NETDATA_EBPF_HIST_MAX_BINS); |
| 1081 | |
| 1082 | write_histogram_chart( |
| 1083 | NETDATA_FILESYSTEM_FAMILY, |
| 1084 | efp->hwrite.name, |
| 1085 | efp->hwrite.histogram, |
| 1086 | dimensions, |
| 1087 | NETDATA_EBPF_HIST_MAX_BINS); |
| 1088 | |
| 1089 | write_histogram_chart( |
| 1090 | NETDATA_FILESYSTEM_FAMILY, |
| 1091 | efp->hopen.name, |
| 1092 | efp->hopen.histogram, |
| 1093 | dimensions, |
| 1094 | NETDATA_EBPF_HIST_MAX_BINS); |
| 1095 | |
| 1096 | write_histogram_chart( |
| 1097 | NETDATA_FILESYSTEM_FAMILY, |
| 1098 | efp->hadditional.name, |
| 1099 | efp->hadditional.histogram, |
| 1100 | dimensions, |
| 1101 | NETDATA_EBPF_HIST_MAX_BINS); |
| 1102 | } |
| 1103 | } |
| 1104 | } |
| 1105 | |
| 1106 | /** |
| 1107 | * Main loop for this collector. |
| 1108 | * |
| 1109 | * @param em main structure for this thread |
| 1110 | */ |
| 1111 | static void filesystem_collector(ebpf_module_t *em) |
| 1112 | { |
| 1113 | int update_every = em->update_every; |
| 1114 | int counter = update_every - 1; |
| 1115 | uint32_t running_time = 0; |
| 1116 | uint32_t lifetime = em->lifetime; |
| 1117 | heartbeat_t hb; |
| 1118 | heartbeat_init(&hb, USEC_PER_SEC); |
| 1119 | while (!ebpf_plugin_stop() && running_time < lifetime) { |
| 1120 | if (ebpf_plugin_stop()) |
| 1121 | break; |
| 1122 | |
| 1123 | heartbeat_next(&hb); |
| 1124 | if (ebpf_plugin_stop()) |
| 1125 | break; |
| 1126 | |
| 1127 | if (++counter != update_every) |
| 1128 | continue; |
| 1129 | |
| 1130 | counter = 0; |
| 1131 | ebpf_filesystem_read_hash(em); |
| 1132 | netdata_mutex_lock(&lock); |
| 1133 | |
| 1134 | ebpf_create_fs_charts(update_every); |
| 1135 | ebpf_histogram_send_data(); |
| 1136 | |
| 1137 | netdata_mutex_unlock(&lock); |
| 1138 | |
| 1139 | if (ebpf_plugin_stop()) |
| 1140 | break; |
| 1141 | |
| 1142 | netdata_mutex_lock(&ebpf_exit_cleanup); |
| 1143 | if (running_time) |
| 1144 | running_time += update_every; |
| 1145 | else |
| 1146 | running_time = update_every; |
| 1147 | |
| 1148 | em->running_time = running_time; |
| 1149 | netdata_mutex_unlock(&ebpf_exit_cleanup); |
| 1150 | } |
| 1151 | } |
| 1152 | |
| 1153 | /***************************************************************** |
| 1154 | * |
| 1155 | * ENTRY THREAD |
| 1156 | * |
| 1157 | *****************************************************************/ |
| 1158 | |
| 1159 | /** |
| 1160 | * Update Filesystem |
| 1161 | * |
| 1162 | * Update file system structure using values read from configuration file. |
| 1163 | */ |
| 1164 | static void ebpf_update_filesystem(void) |
| 1165 | { |
| 1166 | char dist[NETDATA_FS_MAX_DIST_NAME + 1]; |
| 1167 | int i; |
| 1168 | for (i = 0; localfs[i].filesystem; i++) { |
| 1169 | snprintfz(dist, NETDATA_FS_MAX_DIST_NAME, "%sdist", localfs[i].filesystem); |
| 1170 | |
| 1171 | localfs[i].enabled = inicfg_get_boolean(&fs_config, NETDATA_FILESYSTEM_CONFIG_NAME, dist, CONFIG_BOOLEAN_YES); |
| 1172 | } |
| 1173 | } |
| 1174 | |
| 1175 | /** |
| 1176 | * Set maps |
| 1177 | * |
| 1178 | * When thread is initialized the variable fs_maps is set as null, |
| 1179 | * this function fills the variable before to use. |
| 1180 | */ |
| 1181 | static void ebpf_set_maps(void) |
| 1182 | { |
| 1183 | localfs[NETDATA_FS_LOCALFS_EXT4].fs_maps = ext4_maps; |
| 1184 | localfs[NETDATA_FS_LOCALFS_XFS].fs_maps = xfs_maps; |
| 1185 | localfs[NETDATA_FS_LOCALFS_NFS].fs_maps = nfs_maps; |
| 1186 | localfs[NETDATA_FS_LOCALFS_ZFS].fs_maps = zfs_maps; |
| 1187 | localfs[NETDATA_FS_LOCALFS_BTRFS].fs_maps = btrfs_maps; |
| 1188 | } |
| 1189 | |
| 1190 | /** |
| 1191 | * Filesystem thread |
| 1192 | * |
| 1193 | * Thread used to generate filesystem charts. |
| 1194 | * |
| 1195 | * @param ptr a pointer to `struct ebpf_module` |
| 1196 | * |
| 1197 | * @return It always return NULL |
| 1198 | */ |
| 1199 | void ebpf_filesystem_thread(void *ptr) |
| 1200 | { |
| 1201 | ebpf_module_t *em = (ebpf_module_t *)ptr; |
| 1202 | |
| 1203 | CLEANUP_FUNCTION_REGISTER(ebpf_filesystem_exit) cleanup_ptr = em; |
| 1204 | |
| 1205 | if (!ebpf_module_thread_has_valid_state(em)) { |
| 1206 | goto endfilesystem; |
| 1207 | } |
| 1208 | |
| 1209 | ebpf_set_maps(); |
| 1210 | ebpf_update_filesystem(); |
| 1211 | |
| 1212 | // Initialize optional as zero, to identify when there are not partitions to monitor |
| 1213 | em->optional = 0; |
| 1214 | |
| 1215 | #ifdef LIBBPF_MAJOR_VERSION |
| 1216 | ebpf_adjust_thread_load(em, default_btf); |
| 1217 | #endif |
| 1218 | if (ebpf_update_partitions(em)) { |
| 1219 | if (em->optional) |
| 1220 | netdata_log_info("Netdata cannot monitor the filesystems used on this host."); |
| 1221 | |
| 1222 | goto endfilesystem; |
| 1223 | } |
| 1224 | |
| 1225 | int algorithms[NETDATA_EBPF_HIST_MAX_BINS]; |
| 1226 | ebpf_fill_algorithms(algorithms, NETDATA_EBPF_HIST_MAX_BINS, NETDATA_EBPF_INCREMENTAL_IDX); |
| 1227 | ebpf_global_labels( |
| 1228 | filesystem_aggregated_data, |
| 1229 | filesystem_publish_aggregated, |
| 1230 | dimensions, |
| 1231 | dimensions, |
| 1232 | algorithms, |
| 1233 | NETDATA_EBPF_HIST_MAX_BINS); |
| 1234 | |
| 1235 | netdata_mutex_lock(&lock); |
| 1236 | ebpf_create_fs_charts(em->update_every); |
| 1237 | ebpf_update_stats(&plugin_statistics, em); |
| 1238 | netdata_mutex_unlock(&lock); |
| 1239 | |
| 1240 | filesystem_collector(em); |
| 1241 | |
| 1242 | endfilesystem: |
| 1243 | ebpf_update_disabled_plugin_stats(em); |
| 1244 | } |