1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * f2fs sysfs interface 4 * 5 * Copyright (c) 2012 Samsung Electronics Co., Ltd. 6 * http://www.samsung.com/ 7 * Copyright (c) 2017 Chao Yu <chao@kernel.org> 8 */ 9 #include <linux/compiler.h> 10 #include <linux/proc_fs.h> 11 #include <linux/f2fs_fs.h> 12 #include <linux/seq_file.h> 13 #include <linux/unicode.h> 14 #include <linux/ioprio.h> 15 #include <linux/sysfs.h> 16 17 #include "f2fs.h" 18 #include "segment.h" 19 #include "gc.h" 20 #include "iostat.h" 21 #include <trace/events/f2fs.h> 22 23 static struct proc_dir_entry *f2fs_proc_root; 24 25 /* Sysfs support for f2fs */ 26 enum { 27 GC_THREAD, /* struct f2fs_gc_thread */ 28 SM_INFO, /* struct f2fs_sm_info */ 29 DCC_INFO, /* struct discard_cmd_control */ 30 NM_INFO, /* struct f2fs_nm_info */ 31 F2FS_SBI, /* struct f2fs_sb_info */ 32 #ifdef CONFIG_F2FS_STAT_FS 33 STAT_INFO, /* struct f2fs_stat_info */ 34 #endif 35 #ifdef CONFIG_F2FS_FAULT_INJECTION 36 FAULT_INFO_RATE, /* struct f2fs_fault_info */ 37 FAULT_INFO_TYPE, /* struct f2fs_fault_info */ 38 #endif 39 RESERVED_BLOCKS, /* struct f2fs_sb_info */ 40 CPRC_INFO, /* struct ckpt_req_control */ 41 ATGC_INFO, /* struct atgc_management */ 42 }; 43 44 static const char *gc_mode_names[MAX_GC_MODE] = { 45 "GC_NORMAL", 46 "GC_IDLE_CB", 47 "GC_IDLE_GREEDY", 48 "GC_IDLE_AT", 49 "GC_URGENT_HIGH", 50 "GC_URGENT_LOW", 51 "GC_URGENT_MID" 52 }; 53 54 struct f2fs_attr { 55 struct attribute attr; 56 ssize_t (*show)(struct f2fs_attr *a, struct f2fs_sb_info *sbi, char *buf); 57 ssize_t (*store)(struct f2fs_attr *a, struct f2fs_sb_info *sbi, 58 const char *buf, size_t len); 59 int struct_type; 60 int offset; 61 int id; 62 }; 63 64 static ssize_t f2fs_sbi_show(struct f2fs_attr *a, 65 struct f2fs_sb_info *sbi, char *buf); 66 67 static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type) 68 { 69 if (struct_type == GC_THREAD) 70 return (unsigned char *)sbi->gc_thread; 71 else if (struct_type == SM_INFO) 72 return (unsigned char *)SM_I(sbi); 73 else if (struct_type == DCC_INFO) 74 return (unsigned char *)SM_I(sbi)->dcc_info; 75 else if (struct_type == NM_INFO) 76 return (unsigned char *)NM_I(sbi); 77 else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS) 78 return (unsigned char *)sbi; 79 #ifdef CONFIG_F2FS_FAULT_INJECTION 80 else if (struct_type == FAULT_INFO_RATE || 81 struct_type == FAULT_INFO_TYPE) 82 return (unsigned char *)&F2FS_OPTION(sbi).fault_info; 83 #endif 84 #ifdef CONFIG_F2FS_STAT_FS 85 else if (struct_type == STAT_INFO) 86 return (unsigned char *)F2FS_STAT(sbi); 87 #endif 88 else if (struct_type == CPRC_INFO) 89 return (unsigned char *)&sbi->cprc_info; 90 else if (struct_type == ATGC_INFO) 91 return (unsigned char *)&sbi->am; 92 return NULL; 93 } 94 95 static ssize_t dirty_segments_show(struct f2fs_attr *a, 96 struct f2fs_sb_info *sbi, char *buf) 97 { 98 return sysfs_emit(buf, "%llu\n", 99 (unsigned long long)(dirty_segments(sbi))); 100 } 101 102 static ssize_t free_segments_show(struct f2fs_attr *a, 103 struct f2fs_sb_info *sbi, char *buf) 104 { 105 return sysfs_emit(buf, "%llu\n", 106 (unsigned long long)(free_segments(sbi))); 107 } 108 109 static ssize_t ovp_segments_show(struct f2fs_attr *a, 110 struct f2fs_sb_info *sbi, char *buf) 111 { 112 return sysfs_emit(buf, "%llu\n", 113 (unsigned long long)(overprovision_segments(sbi))); 114 } 115 116 static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a, 117 struct f2fs_sb_info *sbi, char *buf) 118 { 119 return sysfs_emit(buf, "%llu\n", 120 (unsigned long long)(sbi->kbytes_written + 121 ((f2fs_get_sectors_written(sbi) - 122 sbi->sectors_written_start) >> 1))); 123 } 124 125 static ssize_t sb_status_show(struct f2fs_attr *a, 126 struct f2fs_sb_info *sbi, char *buf) 127 { 128 return sysfs_emit(buf, "%lx\n", sbi->s_flag); 129 } 130 131 static ssize_t cp_status_show(struct f2fs_attr *a, 132 struct f2fs_sb_info *sbi, char *buf) 133 { 134 return sysfs_emit(buf, "%x\n", le32_to_cpu(F2FS_CKPT(sbi)->ckpt_flags)); 135 } 136 137 static ssize_t pending_discard_show(struct f2fs_attr *a, 138 struct f2fs_sb_info *sbi, char *buf) 139 { 140 if (!SM_I(sbi)->dcc_info) 141 return -EINVAL; 142 return sysfs_emit(buf, "%llu\n", (unsigned long long)atomic_read( 143 &SM_I(sbi)->dcc_info->discard_cmd_cnt)); 144 } 145 146 static ssize_t gc_mode_show(struct f2fs_attr *a, 147 struct f2fs_sb_info *sbi, char *buf) 148 { 149 return sysfs_emit(buf, "%s\n", gc_mode_names[sbi->gc_mode]); 150 } 151 152 static ssize_t features_show(struct f2fs_attr *a, 153 struct f2fs_sb_info *sbi, char *buf) 154 { 155 int len = 0; 156 157 if (f2fs_sb_has_encrypt(sbi)) 158 len += scnprintf(buf, PAGE_SIZE - len, "%s", 159 "encryption"); 160 if (f2fs_sb_has_blkzoned(sbi)) 161 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s", 162 len ? ", " : "", "blkzoned"); 163 if (f2fs_sb_has_extra_attr(sbi)) 164 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s", 165 len ? ", " : "", "extra_attr"); 166 if (f2fs_sb_has_project_quota(sbi)) 167 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s", 168 len ? ", " : "", "projquota"); 169 if (f2fs_sb_has_inode_chksum(sbi)) 170 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s", 171 len ? ", " : "", "inode_checksum"); 172 if (f2fs_sb_has_flexible_inline_xattr(sbi)) 173 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s", 174 len ? ", " : "", "flexible_inline_xattr"); 175 if (f2fs_sb_has_quota_ino(sbi)) 176 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s", 177 len ? ", " : "", "quota_ino"); 178 if (f2fs_sb_has_inode_crtime(sbi)) 179 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s", 180 len ? ", " : "", "inode_crtime"); 181 if (f2fs_sb_has_lost_found(sbi)) 182 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s", 183 len ? ", " : "", "lost_found"); 184 if (f2fs_sb_has_verity(sbi)) 185 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s", 186 len ? ", " : "", "verity"); 187 if (f2fs_sb_has_sb_chksum(sbi)) 188 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s", 189 len ? ", " : "", "sb_checksum"); 190 if (f2fs_sb_has_casefold(sbi)) 191 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s", 192 len ? ", " : "", "casefold"); 193 if (f2fs_sb_has_readonly(sbi)) 194 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s", 195 len ? ", " : "", "readonly"); 196 if (f2fs_sb_has_compression(sbi)) 197 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s", 198 len ? ", " : "", "compression"); 199 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s", 200 len ? ", " : "", "pin_file"); 201 len += scnprintf(buf + len, PAGE_SIZE - len, "\n"); 202 return len; 203 } 204 205 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a, 206 struct f2fs_sb_info *sbi, char *buf) 207 { 208 return sysfs_emit(buf, "%u\n", sbi->current_reserved_blocks); 209 } 210 211 static ssize_t unusable_show(struct f2fs_attr *a, 212 struct f2fs_sb_info *sbi, char *buf) 213 { 214 block_t unusable; 215 216 if (test_opt(sbi, DISABLE_CHECKPOINT)) 217 unusable = sbi->unusable_block_count; 218 else 219 unusable = f2fs_get_unusable_blocks(sbi); 220 return sysfs_emit(buf, "%llu\n", (unsigned long long)unusable); 221 } 222 223 static ssize_t encoding_show(struct f2fs_attr *a, 224 struct f2fs_sb_info *sbi, char *buf) 225 { 226 #if IS_ENABLED(CONFIG_UNICODE) 227 struct super_block *sb = sbi->sb; 228 229 if (f2fs_sb_has_casefold(sbi)) 230 return sysfs_emit(buf, "UTF-8 (%d.%d.%d)\n", 231 (sb->s_encoding->version >> 16) & 0xff, 232 (sb->s_encoding->version >> 8) & 0xff, 233 sb->s_encoding->version & 0xff); 234 #endif 235 return sysfs_emit(buf, "(none)\n"); 236 } 237 238 static ssize_t mounted_time_sec_show(struct f2fs_attr *a, 239 struct f2fs_sb_info *sbi, char *buf) 240 { 241 return sysfs_emit(buf, "%llu\n", SIT_I(sbi)->mounted_time); 242 } 243 244 #ifdef CONFIG_F2FS_STAT_FS 245 static ssize_t moved_blocks_foreground_show(struct f2fs_attr *a, 246 struct f2fs_sb_info *sbi, char *buf) 247 { 248 struct f2fs_stat_info *si = F2FS_STAT(sbi); 249 250 return sysfs_emit(buf, "%llu\n", 251 (unsigned long long)(si->tot_blks - 252 (si->bg_data_blks + si->bg_node_blks))); 253 } 254 255 static ssize_t moved_blocks_background_show(struct f2fs_attr *a, 256 struct f2fs_sb_info *sbi, char *buf) 257 { 258 struct f2fs_stat_info *si = F2FS_STAT(sbi); 259 260 return sysfs_emit(buf, "%llu\n", 261 (unsigned long long)(si->bg_data_blks + si->bg_node_blks)); 262 } 263 264 static ssize_t avg_vblocks_show(struct f2fs_attr *a, 265 struct f2fs_sb_info *sbi, char *buf) 266 { 267 struct f2fs_stat_info *si = F2FS_STAT(sbi); 268 269 si->dirty_count = dirty_segments(sbi); 270 f2fs_update_sit_info(sbi); 271 return sysfs_emit(buf, "%llu\n", (unsigned long long)(si->avg_vblocks)); 272 } 273 #endif 274 275 static ssize_t main_blkaddr_show(struct f2fs_attr *a, 276 struct f2fs_sb_info *sbi, char *buf) 277 { 278 return sysfs_emit(buf, "%llu\n", 279 (unsigned long long)MAIN_BLKADDR(sbi)); 280 } 281 282 static ssize_t f2fs_sbi_show(struct f2fs_attr *a, 283 struct f2fs_sb_info *sbi, char *buf) 284 { 285 unsigned char *ptr = NULL; 286 unsigned int *ui; 287 288 ptr = __struct_ptr(sbi, a->struct_type); 289 if (!ptr) 290 return -EINVAL; 291 292 if (!strcmp(a->attr.name, "extension_list")) { 293 __u8 (*extlist)[F2FS_EXTENSION_LEN] = 294 sbi->raw_super->extension_list; 295 int cold_count = le32_to_cpu(sbi->raw_super->extension_count); 296 int hot_count = sbi->raw_super->hot_ext_count; 297 int len = 0, i; 298 299 len += scnprintf(buf + len, PAGE_SIZE - len, 300 "cold file extension:\n"); 301 for (i = 0; i < cold_count; i++) 302 len += scnprintf(buf + len, PAGE_SIZE - len, "%s\n", 303 extlist[i]); 304 305 len += scnprintf(buf + len, PAGE_SIZE - len, 306 "hot file extension:\n"); 307 for (i = cold_count; i < cold_count + hot_count; i++) 308 len += scnprintf(buf + len, PAGE_SIZE - len, "%s\n", 309 extlist[i]); 310 return len; 311 } 312 313 if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) { 314 struct ckpt_req_control *cprc = &sbi->cprc_info; 315 int class = IOPRIO_PRIO_CLASS(cprc->ckpt_thread_ioprio); 316 int data = IOPRIO_PRIO_DATA(cprc->ckpt_thread_ioprio); 317 318 if (class != IOPRIO_CLASS_RT && class != IOPRIO_CLASS_BE) 319 return -EINVAL; 320 321 return sysfs_emit(buf, "%s,%d\n", 322 class == IOPRIO_CLASS_RT ? "rt" : "be", data); 323 } 324 325 #ifdef CONFIG_F2FS_FS_COMPRESSION 326 if (!strcmp(a->attr.name, "compr_written_block")) 327 return sysfs_emit(buf, "%llu\n", sbi->compr_written_block); 328 329 if (!strcmp(a->attr.name, "compr_saved_block")) 330 return sysfs_emit(buf, "%llu\n", sbi->compr_saved_block); 331 332 if (!strcmp(a->attr.name, "compr_new_inode")) 333 return sysfs_emit(buf, "%u\n", sbi->compr_new_inode); 334 #endif 335 336 if (!strcmp(a->attr.name, "gc_segment_mode")) 337 return sysfs_emit(buf, "%u\n", sbi->gc_segment_mode); 338 339 if (!strcmp(a->attr.name, "gc_reclaimed_segments")) { 340 return sysfs_emit(buf, "%u\n", 341 sbi->gc_reclaimed_segs[sbi->gc_segment_mode]); 342 } 343 344 if (!strcmp(a->attr.name, "current_atomic_write")) { 345 s64 current_write = atomic64_read(&sbi->current_atomic_write); 346 347 return sysfs_emit(buf, "%lld\n", current_write); 348 } 349 350 if (!strcmp(a->attr.name, "peak_atomic_write")) 351 return sysfs_emit(buf, "%lld\n", sbi->peak_atomic_write); 352 353 if (!strcmp(a->attr.name, "committed_atomic_block")) 354 return sysfs_emit(buf, "%llu\n", sbi->committed_atomic_block); 355 356 if (!strcmp(a->attr.name, "revoked_atomic_block")) 357 return sysfs_emit(buf, "%llu\n", sbi->revoked_atomic_block); 358 359 ui = (unsigned int *)(ptr + a->offset); 360 361 return sysfs_emit(buf, "%u\n", *ui); 362 } 363 364 static ssize_t __sbi_store(struct f2fs_attr *a, 365 struct f2fs_sb_info *sbi, 366 const char *buf, size_t count) 367 { 368 unsigned char *ptr; 369 unsigned long t; 370 unsigned int *ui; 371 ssize_t ret; 372 373 ptr = __struct_ptr(sbi, a->struct_type); 374 if (!ptr) 375 return -EINVAL; 376 377 if (!strcmp(a->attr.name, "extension_list")) { 378 const char *name = strim((char *)buf); 379 bool set = true, hot; 380 381 if (!strncmp(name, "[h]", 3)) 382 hot = true; 383 else if (!strncmp(name, "[c]", 3)) 384 hot = false; 385 else 386 return -EINVAL; 387 388 name += 3; 389 390 if (*name == '!') { 391 name++; 392 set = false; 393 } 394 395 if (!strlen(name) || strlen(name) >= F2FS_EXTENSION_LEN) 396 return -EINVAL; 397 398 f2fs_down_write(&sbi->sb_lock); 399 400 ret = f2fs_update_extension_list(sbi, name, hot, set); 401 if (ret) 402 goto out; 403 404 ret = f2fs_commit_super(sbi, false); 405 if (ret) 406 f2fs_update_extension_list(sbi, name, hot, !set); 407 out: 408 f2fs_up_write(&sbi->sb_lock); 409 return ret ? ret : count; 410 } 411 412 if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) { 413 const char *name = strim((char *)buf); 414 struct ckpt_req_control *cprc = &sbi->cprc_info; 415 int class; 416 long data; 417 int ret; 418 419 if (!strncmp(name, "rt,", 3)) 420 class = IOPRIO_CLASS_RT; 421 else if (!strncmp(name, "be,", 3)) 422 class = IOPRIO_CLASS_BE; 423 else 424 return -EINVAL; 425 426 name += 3; 427 ret = kstrtol(name, 10, &data); 428 if (ret) 429 return ret; 430 if (data >= IOPRIO_NR_LEVELS || data < 0) 431 return -EINVAL; 432 433 cprc->ckpt_thread_ioprio = IOPRIO_PRIO_VALUE(class, data); 434 if (test_opt(sbi, MERGE_CHECKPOINT)) { 435 ret = set_task_ioprio(cprc->f2fs_issue_ckpt, 436 cprc->ckpt_thread_ioprio); 437 if (ret) 438 return ret; 439 } 440 441 return count; 442 } 443 444 ui = (unsigned int *)(ptr + a->offset); 445 446 ret = kstrtoul(skip_spaces(buf), 0, &t); 447 if (ret < 0) 448 return ret; 449 #ifdef CONFIG_F2FS_FAULT_INJECTION 450 if (a->struct_type == FAULT_INFO_TYPE && t >= BIT(FAULT_MAX)) 451 return -EINVAL; 452 if (a->struct_type == FAULT_INFO_RATE && t >= UINT_MAX) 453 return -EINVAL; 454 #endif 455 if (a->struct_type == RESERVED_BLOCKS) { 456 spin_lock(&sbi->stat_lock); 457 if (t > (unsigned long)(sbi->user_block_count - 458 F2FS_OPTION(sbi).root_reserved_blocks - 459 sbi->blocks_per_seg * 460 SM_I(sbi)->additional_reserved_segments)) { 461 spin_unlock(&sbi->stat_lock); 462 return -EINVAL; 463 } 464 *ui = t; 465 sbi->current_reserved_blocks = min(sbi->reserved_blocks, 466 sbi->user_block_count - valid_user_blocks(sbi)); 467 spin_unlock(&sbi->stat_lock); 468 return count; 469 } 470 471 if (!strcmp(a->attr.name, "discard_io_aware_gran")) { 472 if (t > MAX_PLIST_NUM) 473 return -EINVAL; 474 if (!f2fs_block_unit_discard(sbi)) 475 return -EINVAL; 476 if (t == *ui) 477 return count; 478 *ui = t; 479 return count; 480 } 481 482 if (!strcmp(a->attr.name, "discard_granularity")) { 483 if (t == 0 || t > MAX_PLIST_NUM) 484 return -EINVAL; 485 if (!f2fs_block_unit_discard(sbi)) 486 return -EINVAL; 487 if (t == *ui) 488 return count; 489 *ui = t; 490 return count; 491 } 492 493 if (!strcmp(a->attr.name, "max_ordered_discard")) { 494 if (t == 0 || t > MAX_PLIST_NUM) 495 return -EINVAL; 496 if (!f2fs_block_unit_discard(sbi)) 497 return -EINVAL; 498 *ui = t; 499 return count; 500 } 501 502 if (!strcmp(a->attr.name, "discard_urgent_util")) { 503 if (t > 100) 504 return -EINVAL; 505 *ui = t; 506 return count; 507 } 508 509 if (!strcmp(a->attr.name, "migration_granularity")) { 510 if (t == 0 || t > sbi->segs_per_sec) 511 return -EINVAL; 512 } 513 514 if (!strcmp(a->attr.name, "gc_urgent")) { 515 if (t == 0) { 516 sbi->gc_mode = GC_NORMAL; 517 } else if (t == 1) { 518 sbi->gc_mode = GC_URGENT_HIGH; 519 if (sbi->gc_thread) { 520 sbi->gc_thread->gc_wake = true; 521 wake_up_interruptible_all( 522 &sbi->gc_thread->gc_wait_queue_head); 523 wake_up_discard_thread(sbi, true); 524 } 525 } else if (t == 2) { 526 sbi->gc_mode = GC_URGENT_LOW; 527 } else if (t == 3) { 528 sbi->gc_mode = GC_URGENT_MID; 529 if (sbi->gc_thread) { 530 sbi->gc_thread->gc_wake = true; 531 wake_up_interruptible_all( 532 &sbi->gc_thread->gc_wait_queue_head); 533 } 534 } else { 535 return -EINVAL; 536 } 537 return count; 538 } 539 if (!strcmp(a->attr.name, "gc_idle")) { 540 if (t == GC_IDLE_CB) { 541 sbi->gc_mode = GC_IDLE_CB; 542 } else if (t == GC_IDLE_GREEDY) { 543 sbi->gc_mode = GC_IDLE_GREEDY; 544 } else if (t == GC_IDLE_AT) { 545 if (!sbi->am.atgc_enabled) 546 return -EINVAL; 547 sbi->gc_mode = GC_IDLE_AT; 548 } else { 549 sbi->gc_mode = GC_NORMAL; 550 } 551 return count; 552 } 553 554 if (!strcmp(a->attr.name, "gc_remaining_trials")) { 555 spin_lock(&sbi->gc_remaining_trials_lock); 556 sbi->gc_remaining_trials = t; 557 spin_unlock(&sbi->gc_remaining_trials_lock); 558 559 return count; 560 } 561 562 #ifdef CONFIG_F2FS_IOSTAT 563 if (!strcmp(a->attr.name, "iostat_enable")) { 564 sbi->iostat_enable = !!t; 565 if (!sbi->iostat_enable) 566 f2fs_reset_iostat(sbi); 567 return count; 568 } 569 570 if (!strcmp(a->attr.name, "iostat_period_ms")) { 571 if (t < MIN_IOSTAT_PERIOD_MS || t > MAX_IOSTAT_PERIOD_MS) 572 return -EINVAL; 573 spin_lock_irq(&sbi->iostat_lock); 574 sbi->iostat_period_ms = (unsigned int)t; 575 spin_unlock_irq(&sbi->iostat_lock); 576 return count; 577 } 578 #endif 579 580 #ifdef CONFIG_F2FS_FS_COMPRESSION 581 if (!strcmp(a->attr.name, "compr_written_block") || 582 !strcmp(a->attr.name, "compr_saved_block")) { 583 if (t != 0) 584 return -EINVAL; 585 sbi->compr_written_block = 0; 586 sbi->compr_saved_block = 0; 587 return count; 588 } 589 590 if (!strcmp(a->attr.name, "compr_new_inode")) { 591 if (t != 0) 592 return -EINVAL; 593 sbi->compr_new_inode = 0; 594 return count; 595 } 596 597 if (!strcmp(a->attr.name, "compress_percent")) { 598 if (t == 0 || t > 100) 599 return -EINVAL; 600 *ui = t; 601 return count; 602 } 603 604 if (!strcmp(a->attr.name, "compress_watermark")) { 605 if (t == 0 || t > 100) 606 return -EINVAL; 607 *ui = t; 608 return count; 609 } 610 #endif 611 612 if (!strcmp(a->attr.name, "atgc_candidate_ratio")) { 613 if (t > 100) 614 return -EINVAL; 615 sbi->am.candidate_ratio = t; 616 return count; 617 } 618 619 if (!strcmp(a->attr.name, "atgc_age_weight")) { 620 if (t > 100) 621 return -EINVAL; 622 sbi->am.age_weight = t; 623 return count; 624 } 625 626 if (!strcmp(a->attr.name, "gc_segment_mode")) { 627 if (t < MAX_GC_MODE) 628 sbi->gc_segment_mode = t; 629 else 630 return -EINVAL; 631 return count; 632 } 633 634 if (!strcmp(a->attr.name, "gc_reclaimed_segments")) { 635 if (t != 0) 636 return -EINVAL; 637 sbi->gc_reclaimed_segs[sbi->gc_segment_mode] = 0; 638 return count; 639 } 640 641 if (!strcmp(a->attr.name, "seq_file_ra_mul")) { 642 if (t >= MIN_RA_MUL && t <= MAX_RA_MUL) 643 sbi->seq_file_ra_mul = t; 644 else 645 return -EINVAL; 646 return count; 647 } 648 649 if (!strcmp(a->attr.name, "max_fragment_chunk")) { 650 if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE) 651 sbi->max_fragment_chunk = t; 652 else 653 return -EINVAL; 654 return count; 655 } 656 657 if (!strcmp(a->attr.name, "max_fragment_hole")) { 658 if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE) 659 sbi->max_fragment_hole = t; 660 else 661 return -EINVAL; 662 return count; 663 } 664 665 if (!strcmp(a->attr.name, "peak_atomic_write")) { 666 if (t != 0) 667 return -EINVAL; 668 sbi->peak_atomic_write = 0; 669 return count; 670 } 671 672 if (!strcmp(a->attr.name, "committed_atomic_block")) { 673 if (t != 0) 674 return -EINVAL; 675 sbi->committed_atomic_block = 0; 676 return count; 677 } 678 679 if (!strcmp(a->attr.name, "revoked_atomic_block")) { 680 if (t != 0) 681 return -EINVAL; 682 sbi->revoked_atomic_block = 0; 683 return count; 684 } 685 686 if (!strcmp(a->attr.name, "readdir_ra")) { 687 sbi->readdir_ra = !!t; 688 return count; 689 } 690 691 if (!strcmp(a->attr.name, "hot_data_age_threshold")) { 692 if (t == 0 || t >= sbi->warm_data_age_threshold) 693 return -EINVAL; 694 if (t == *ui) 695 return count; 696 *ui = (unsigned int)t; 697 return count; 698 } 699 700 if (!strcmp(a->attr.name, "warm_data_age_threshold")) { 701 if (t <= sbi->hot_data_age_threshold) 702 return -EINVAL; 703 if (t == *ui) 704 return count; 705 *ui = (unsigned int)t; 706 return count; 707 } 708 709 if (!strcmp(a->attr.name, "last_age_weight")) { 710 if (t > 100) 711 return -EINVAL; 712 if (t == *ui) 713 return count; 714 *ui = (unsigned int)t; 715 return count; 716 } 717 718 if (!strcmp(a->attr.name, "ipu_policy")) { 719 if (t >= BIT(F2FS_IPU_MAX)) 720 return -EINVAL; 721 if (t && f2fs_lfs_mode(sbi)) 722 return -EINVAL; 723 SM_I(sbi)->ipu_policy = (unsigned int)t; 724 return count; 725 } 726 727 *ui = (unsigned int)t; 728 729 return count; 730 } 731 732 static ssize_t f2fs_sbi_store(struct f2fs_attr *a, 733 struct f2fs_sb_info *sbi, 734 const char *buf, size_t count) 735 { 736 ssize_t ret; 737 bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") || 738 a->struct_type == GC_THREAD); 739 740 if (gc_entry) { 741 if (!down_read_trylock(&sbi->sb->s_umount)) 742 return -EAGAIN; 743 } 744 ret = __sbi_store(a, sbi, buf, count); 745 if (gc_entry) 746 up_read(&sbi->sb->s_umount); 747 748 return ret; 749 } 750 751 static ssize_t f2fs_attr_show(struct kobject *kobj, 752 struct attribute *attr, char *buf) 753 { 754 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, 755 s_kobj); 756 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); 757 758 return a->show ? a->show(a, sbi, buf) : 0; 759 } 760 761 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr, 762 const char *buf, size_t len) 763 { 764 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, 765 s_kobj); 766 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); 767 768 return a->store ? a->store(a, sbi, buf, len) : 0; 769 } 770 771 static void f2fs_sb_release(struct kobject *kobj) 772 { 773 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, 774 s_kobj); 775 complete(&sbi->s_kobj_unregister); 776 } 777 778 /* 779 * Note that there are three feature list entries: 780 * 1) /sys/fs/f2fs/features 781 * : shows runtime features supported by in-kernel f2fs along with Kconfig. 782 * - ref. F2FS_FEATURE_RO_ATTR() 783 * 784 * 2) /sys/fs/f2fs/$s_id/features <deprecated> 785 * : shows on-disk features enabled by mkfs.f2fs, used for old kernels. This 786 * won't add new feature anymore, and thus, users should check entries in 3) 787 * instead of this 2). 788 * 789 * 3) /sys/fs/f2fs/$s_id/feature_list 790 * : shows on-disk features enabled by mkfs.f2fs per instance, which follows 791 * sysfs entry rule where each entry should expose single value. 792 * This list covers old feature list provided by 2) and beyond. Therefore, 793 * please add new on-disk feature in this list only. 794 * - ref. F2FS_SB_FEATURE_RO_ATTR() 795 */ 796 static ssize_t f2fs_feature_show(struct f2fs_attr *a, 797 struct f2fs_sb_info *sbi, char *buf) 798 { 799 return sysfs_emit(buf, "supported\n"); 800 } 801 802 #define F2FS_FEATURE_RO_ATTR(_name) \ 803 static struct f2fs_attr f2fs_attr_##_name = { \ 804 .attr = {.name = __stringify(_name), .mode = 0444 }, \ 805 .show = f2fs_feature_show, \ 806 } 807 808 static ssize_t f2fs_sb_feature_show(struct f2fs_attr *a, 809 struct f2fs_sb_info *sbi, char *buf) 810 { 811 if (F2FS_HAS_FEATURE(sbi, a->id)) 812 return sysfs_emit(buf, "supported\n"); 813 return sysfs_emit(buf, "unsupported\n"); 814 } 815 816 #define F2FS_SB_FEATURE_RO_ATTR(_name, _feat) \ 817 static struct f2fs_attr f2fs_attr_sb_##_name = { \ 818 .attr = {.name = __stringify(_name), .mode = 0444 }, \ 819 .show = f2fs_sb_feature_show, \ 820 .id = F2FS_FEATURE_##_feat, \ 821 } 822 823 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \ 824 static struct f2fs_attr f2fs_attr_##_name = { \ 825 .attr = {.name = __stringify(_name), .mode = _mode }, \ 826 .show = _show, \ 827 .store = _store, \ 828 .struct_type = _struct_type, \ 829 .offset = _offset \ 830 } 831 832 #define F2FS_RO_ATTR(struct_type, struct_name, name, elname) \ 833 F2FS_ATTR_OFFSET(struct_type, name, 0444, \ 834 f2fs_sbi_show, NULL, \ 835 offsetof(struct struct_name, elname)) 836 837 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \ 838 F2FS_ATTR_OFFSET(struct_type, name, 0644, \ 839 f2fs_sbi_show, f2fs_sbi_store, \ 840 offsetof(struct struct_name, elname)) 841 842 #define F2FS_GENERAL_RO_ATTR(name) \ 843 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL) 844 845 #define F2FS_STAT_ATTR(_struct_type, _struct_name, _name, _elname) \ 846 static struct f2fs_attr f2fs_attr_##_name = { \ 847 .attr = {.name = __stringify(_name), .mode = 0444 }, \ 848 .show = f2fs_sbi_show, \ 849 .struct_type = _struct_type, \ 850 .offset = offsetof(struct _struct_name, _elname), \ 851 } 852 853 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time, 854 urgent_sleep_time); 855 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time); 856 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time); 857 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time); 858 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle, gc_mode); 859 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent, gc_mode); 860 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); 861 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards); 862 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_discard_request, max_discard_request); 863 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, min_discard_issue_time, min_discard_issue_time); 864 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, mid_discard_issue_time, mid_discard_issue_time); 865 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_discard_issue_time, max_discard_issue_time); 866 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_io_aware_gran, discard_io_aware_gran); 867 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_urgent_util, discard_urgent_util); 868 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity); 869 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_ordered_discard, max_ordered_discard); 870 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks); 871 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy); 872 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util); 873 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks); 874 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_seq_blocks, min_seq_blocks); 875 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks); 876 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections); 877 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh); 878 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages); 879 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio); 880 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, max_roll_forward_node_blocks, max_rf_node_blocks); 881 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search); 882 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, migration_granularity, migration_granularity); 883 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level); 884 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]); 885 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]); 886 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, discard_idle_interval, 887 interval_time[DISCARD_TIME]); 888 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle_interval, interval_time[GC_TIME]); 889 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, 890 umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]); 891 #ifdef CONFIG_F2FS_IOSTAT 892 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable); 893 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_period_ms, iostat_period_ms); 894 #endif 895 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra); 896 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_io_bytes, max_io_bytes); 897 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold); 898 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list); 899 #ifdef CONFIG_F2FS_FAULT_INJECTION 900 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate); 901 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type); 902 #endif 903 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, data_io_flag, data_io_flag); 904 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, node_io_flag, node_io_flag); 905 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_remaining_trials, gc_remaining_trials); 906 F2FS_RW_ATTR(CPRC_INFO, ckpt_req_control, ckpt_thread_ioprio, ckpt_thread_ioprio); 907 F2FS_GENERAL_RO_ATTR(dirty_segments); 908 F2FS_GENERAL_RO_ATTR(free_segments); 909 F2FS_GENERAL_RO_ATTR(ovp_segments); 910 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes); 911 F2FS_GENERAL_RO_ATTR(features); 912 F2FS_GENERAL_RO_ATTR(current_reserved_blocks); 913 F2FS_GENERAL_RO_ATTR(unusable); 914 F2FS_GENERAL_RO_ATTR(encoding); 915 F2FS_GENERAL_RO_ATTR(mounted_time_sec); 916 F2FS_GENERAL_RO_ATTR(main_blkaddr); 917 F2FS_GENERAL_RO_ATTR(pending_discard); 918 F2FS_GENERAL_RO_ATTR(gc_mode); 919 #ifdef CONFIG_F2FS_STAT_FS 920 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_foreground_calls, cp_count); 921 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_background_calls, bg_cp_count); 922 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, gc_foreground_calls, call_count); 923 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, gc_background_calls, bg_gc); 924 F2FS_GENERAL_RO_ATTR(moved_blocks_background); 925 F2FS_GENERAL_RO_ATTR(moved_blocks_foreground); 926 F2FS_GENERAL_RO_ATTR(avg_vblocks); 927 #endif 928 929 #ifdef CONFIG_FS_ENCRYPTION 930 F2FS_FEATURE_RO_ATTR(encryption); 931 F2FS_FEATURE_RO_ATTR(test_dummy_encryption_v2); 932 #if IS_ENABLED(CONFIG_UNICODE) 933 F2FS_FEATURE_RO_ATTR(encrypted_casefold); 934 #endif 935 #endif /* CONFIG_FS_ENCRYPTION */ 936 #ifdef CONFIG_BLK_DEV_ZONED 937 F2FS_FEATURE_RO_ATTR(block_zoned); 938 F2FS_RO_ATTR(F2FS_SBI, f2fs_sb_info, unusable_blocks_per_sec, 939 unusable_blocks_per_sec); 940 #endif 941 F2FS_FEATURE_RO_ATTR(atomic_write); 942 F2FS_FEATURE_RO_ATTR(extra_attr); 943 F2FS_FEATURE_RO_ATTR(project_quota); 944 F2FS_FEATURE_RO_ATTR(inode_checksum); 945 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr); 946 F2FS_FEATURE_RO_ATTR(quota_ino); 947 F2FS_FEATURE_RO_ATTR(inode_crtime); 948 F2FS_FEATURE_RO_ATTR(lost_found); 949 #ifdef CONFIG_FS_VERITY 950 F2FS_FEATURE_RO_ATTR(verity); 951 #endif 952 F2FS_FEATURE_RO_ATTR(sb_checksum); 953 #if IS_ENABLED(CONFIG_UNICODE) 954 F2FS_FEATURE_RO_ATTR(casefold); 955 #endif 956 F2FS_FEATURE_RO_ATTR(readonly); 957 #ifdef CONFIG_F2FS_FS_COMPRESSION 958 F2FS_FEATURE_RO_ATTR(compression); 959 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_written_block, compr_written_block); 960 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_saved_block, compr_saved_block); 961 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_new_inode, compr_new_inode); 962 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compress_percent, compress_percent); 963 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compress_watermark, compress_watermark); 964 #endif 965 F2FS_FEATURE_RO_ATTR(pin_file); 966 967 /* For ATGC */ 968 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_candidate_ratio, candidate_ratio); 969 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_candidate_count, max_candidate_count); 970 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_age_weight, age_weight); 971 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_age_threshold, age_threshold); 972 973 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, seq_file_ra_mul, seq_file_ra_mul); 974 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_segment_mode, gc_segment_mode); 975 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_reclaimed_segments, gc_reclaimed_segs); 976 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_fragment_chunk, max_fragment_chunk); 977 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_fragment_hole, max_fragment_hole); 978 979 /* For atomic write */ 980 F2FS_RO_ATTR(F2FS_SBI, f2fs_sb_info, current_atomic_write, current_atomic_write); 981 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, peak_atomic_write, peak_atomic_write); 982 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, committed_atomic_block, committed_atomic_block); 983 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, revoked_atomic_block, revoked_atomic_block); 984 985 /* For block age extent cache */ 986 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, hot_data_age_threshold, hot_data_age_threshold); 987 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, warm_data_age_threshold, warm_data_age_threshold); 988 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, last_age_weight, last_age_weight); 989 990 #define ATTR_LIST(name) (&f2fs_attr_##name.attr) 991 static struct attribute *f2fs_attrs[] = { 992 ATTR_LIST(gc_urgent_sleep_time), 993 ATTR_LIST(gc_min_sleep_time), 994 ATTR_LIST(gc_max_sleep_time), 995 ATTR_LIST(gc_no_gc_sleep_time), 996 ATTR_LIST(gc_idle), 997 ATTR_LIST(gc_urgent), 998 ATTR_LIST(reclaim_segments), 999 ATTR_LIST(main_blkaddr), 1000 ATTR_LIST(max_small_discards), 1001 ATTR_LIST(max_discard_request), 1002 ATTR_LIST(min_discard_issue_time), 1003 ATTR_LIST(mid_discard_issue_time), 1004 ATTR_LIST(max_discard_issue_time), 1005 ATTR_LIST(discard_io_aware_gran), 1006 ATTR_LIST(discard_urgent_util), 1007 ATTR_LIST(discard_granularity), 1008 ATTR_LIST(max_ordered_discard), 1009 ATTR_LIST(pending_discard), 1010 ATTR_LIST(gc_mode), 1011 ATTR_LIST(ipu_policy), 1012 ATTR_LIST(min_ipu_util), 1013 ATTR_LIST(min_fsync_blocks), 1014 ATTR_LIST(min_seq_blocks), 1015 ATTR_LIST(min_hot_blocks), 1016 ATTR_LIST(min_ssr_sections), 1017 ATTR_LIST(max_victim_search), 1018 ATTR_LIST(migration_granularity), 1019 ATTR_LIST(dir_level), 1020 ATTR_LIST(ram_thresh), 1021 ATTR_LIST(ra_nid_pages), 1022 ATTR_LIST(dirty_nats_ratio), 1023 ATTR_LIST(max_roll_forward_node_blocks), 1024 ATTR_LIST(cp_interval), 1025 ATTR_LIST(idle_interval), 1026 ATTR_LIST(discard_idle_interval), 1027 ATTR_LIST(gc_idle_interval), 1028 ATTR_LIST(umount_discard_timeout), 1029 #ifdef CONFIG_F2FS_IOSTAT 1030 ATTR_LIST(iostat_enable), 1031 ATTR_LIST(iostat_period_ms), 1032 #endif 1033 ATTR_LIST(readdir_ra), 1034 ATTR_LIST(max_io_bytes), 1035 ATTR_LIST(gc_pin_file_thresh), 1036 ATTR_LIST(extension_list), 1037 #ifdef CONFIG_F2FS_FAULT_INJECTION 1038 ATTR_LIST(inject_rate), 1039 ATTR_LIST(inject_type), 1040 #endif 1041 ATTR_LIST(data_io_flag), 1042 ATTR_LIST(node_io_flag), 1043 ATTR_LIST(gc_remaining_trials), 1044 ATTR_LIST(ckpt_thread_ioprio), 1045 ATTR_LIST(dirty_segments), 1046 ATTR_LIST(free_segments), 1047 ATTR_LIST(ovp_segments), 1048 ATTR_LIST(unusable), 1049 ATTR_LIST(lifetime_write_kbytes), 1050 ATTR_LIST(features), 1051 ATTR_LIST(reserved_blocks), 1052 ATTR_LIST(current_reserved_blocks), 1053 ATTR_LIST(encoding), 1054 ATTR_LIST(mounted_time_sec), 1055 #ifdef CONFIG_F2FS_STAT_FS 1056 ATTR_LIST(cp_foreground_calls), 1057 ATTR_LIST(cp_background_calls), 1058 ATTR_LIST(gc_foreground_calls), 1059 ATTR_LIST(gc_background_calls), 1060 ATTR_LIST(moved_blocks_foreground), 1061 ATTR_LIST(moved_blocks_background), 1062 ATTR_LIST(avg_vblocks), 1063 #endif 1064 #ifdef CONFIG_BLK_DEV_ZONED 1065 ATTR_LIST(unusable_blocks_per_sec), 1066 #endif 1067 #ifdef CONFIG_F2FS_FS_COMPRESSION 1068 ATTR_LIST(compr_written_block), 1069 ATTR_LIST(compr_saved_block), 1070 ATTR_LIST(compr_new_inode), 1071 ATTR_LIST(compress_percent), 1072 ATTR_LIST(compress_watermark), 1073 #endif 1074 /* For ATGC */ 1075 ATTR_LIST(atgc_candidate_ratio), 1076 ATTR_LIST(atgc_candidate_count), 1077 ATTR_LIST(atgc_age_weight), 1078 ATTR_LIST(atgc_age_threshold), 1079 ATTR_LIST(seq_file_ra_mul), 1080 ATTR_LIST(gc_segment_mode), 1081 ATTR_LIST(gc_reclaimed_segments), 1082 ATTR_LIST(max_fragment_chunk), 1083 ATTR_LIST(max_fragment_hole), 1084 ATTR_LIST(current_atomic_write), 1085 ATTR_LIST(peak_atomic_write), 1086 ATTR_LIST(committed_atomic_block), 1087 ATTR_LIST(revoked_atomic_block), 1088 ATTR_LIST(hot_data_age_threshold), 1089 ATTR_LIST(warm_data_age_threshold), 1090 ATTR_LIST(last_age_weight), 1091 NULL, 1092 }; 1093 ATTRIBUTE_GROUPS(f2fs); 1094 1095 static struct attribute *f2fs_feat_attrs[] = { 1096 #ifdef CONFIG_FS_ENCRYPTION 1097 ATTR_LIST(encryption), 1098 ATTR_LIST(test_dummy_encryption_v2), 1099 #if IS_ENABLED(CONFIG_UNICODE) 1100 ATTR_LIST(encrypted_casefold), 1101 #endif 1102 #endif /* CONFIG_FS_ENCRYPTION */ 1103 #ifdef CONFIG_BLK_DEV_ZONED 1104 ATTR_LIST(block_zoned), 1105 #endif 1106 ATTR_LIST(atomic_write), 1107 ATTR_LIST(extra_attr), 1108 ATTR_LIST(project_quota), 1109 ATTR_LIST(inode_checksum), 1110 ATTR_LIST(flexible_inline_xattr), 1111 ATTR_LIST(quota_ino), 1112 ATTR_LIST(inode_crtime), 1113 ATTR_LIST(lost_found), 1114 #ifdef CONFIG_FS_VERITY 1115 ATTR_LIST(verity), 1116 #endif 1117 ATTR_LIST(sb_checksum), 1118 #if IS_ENABLED(CONFIG_UNICODE) 1119 ATTR_LIST(casefold), 1120 #endif 1121 ATTR_LIST(readonly), 1122 #ifdef CONFIG_F2FS_FS_COMPRESSION 1123 ATTR_LIST(compression), 1124 #endif 1125 ATTR_LIST(pin_file), 1126 NULL, 1127 }; 1128 ATTRIBUTE_GROUPS(f2fs_feat); 1129 1130 F2FS_GENERAL_RO_ATTR(sb_status); 1131 F2FS_GENERAL_RO_ATTR(cp_status); 1132 static struct attribute *f2fs_stat_attrs[] = { 1133 ATTR_LIST(sb_status), 1134 ATTR_LIST(cp_status), 1135 NULL, 1136 }; 1137 ATTRIBUTE_GROUPS(f2fs_stat); 1138 1139 F2FS_SB_FEATURE_RO_ATTR(encryption, ENCRYPT); 1140 F2FS_SB_FEATURE_RO_ATTR(block_zoned, BLKZONED); 1141 F2FS_SB_FEATURE_RO_ATTR(extra_attr, EXTRA_ATTR); 1142 F2FS_SB_FEATURE_RO_ATTR(project_quota, PRJQUOTA); 1143 F2FS_SB_FEATURE_RO_ATTR(inode_checksum, INODE_CHKSUM); 1144 F2FS_SB_FEATURE_RO_ATTR(flexible_inline_xattr, FLEXIBLE_INLINE_XATTR); 1145 F2FS_SB_FEATURE_RO_ATTR(quota_ino, QUOTA_INO); 1146 F2FS_SB_FEATURE_RO_ATTR(inode_crtime, INODE_CRTIME); 1147 F2FS_SB_FEATURE_RO_ATTR(lost_found, LOST_FOUND); 1148 F2FS_SB_FEATURE_RO_ATTR(verity, VERITY); 1149 F2FS_SB_FEATURE_RO_ATTR(sb_checksum, SB_CHKSUM); 1150 F2FS_SB_FEATURE_RO_ATTR(casefold, CASEFOLD); 1151 F2FS_SB_FEATURE_RO_ATTR(compression, COMPRESSION); 1152 F2FS_SB_FEATURE_RO_ATTR(readonly, RO); 1153 1154 static struct attribute *f2fs_sb_feat_attrs[] = { 1155 ATTR_LIST(sb_encryption), 1156 ATTR_LIST(sb_block_zoned), 1157 ATTR_LIST(sb_extra_attr), 1158 ATTR_LIST(sb_project_quota), 1159 ATTR_LIST(sb_inode_checksum), 1160 ATTR_LIST(sb_flexible_inline_xattr), 1161 ATTR_LIST(sb_quota_ino), 1162 ATTR_LIST(sb_inode_crtime), 1163 ATTR_LIST(sb_lost_found), 1164 ATTR_LIST(sb_verity), 1165 ATTR_LIST(sb_sb_checksum), 1166 ATTR_LIST(sb_casefold), 1167 ATTR_LIST(sb_compression), 1168 ATTR_LIST(sb_readonly), 1169 NULL, 1170 }; 1171 ATTRIBUTE_GROUPS(f2fs_sb_feat); 1172 1173 static const struct sysfs_ops f2fs_attr_ops = { 1174 .show = f2fs_attr_show, 1175 .store = f2fs_attr_store, 1176 }; 1177 1178 static const struct kobj_type f2fs_sb_ktype = { 1179 .default_groups = f2fs_groups, 1180 .sysfs_ops = &f2fs_attr_ops, 1181 .release = f2fs_sb_release, 1182 }; 1183 1184 static const struct kobj_type f2fs_ktype = { 1185 .sysfs_ops = &f2fs_attr_ops, 1186 }; 1187 1188 static struct kset f2fs_kset = { 1189 .kobj = {.ktype = &f2fs_ktype}, 1190 }; 1191 1192 static const struct kobj_type f2fs_feat_ktype = { 1193 .default_groups = f2fs_feat_groups, 1194 .sysfs_ops = &f2fs_attr_ops, 1195 }; 1196 1197 static struct kobject f2fs_feat = { 1198 .kset = &f2fs_kset, 1199 }; 1200 1201 static ssize_t f2fs_stat_attr_show(struct kobject *kobj, 1202 struct attribute *attr, char *buf) 1203 { 1204 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, 1205 s_stat_kobj); 1206 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); 1207 1208 return a->show ? a->show(a, sbi, buf) : 0; 1209 } 1210 1211 static ssize_t f2fs_stat_attr_store(struct kobject *kobj, struct attribute *attr, 1212 const char *buf, size_t len) 1213 { 1214 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, 1215 s_stat_kobj); 1216 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); 1217 1218 return a->store ? a->store(a, sbi, buf, len) : 0; 1219 } 1220 1221 static void f2fs_stat_kobj_release(struct kobject *kobj) 1222 { 1223 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, 1224 s_stat_kobj); 1225 complete(&sbi->s_stat_kobj_unregister); 1226 } 1227 1228 static const struct sysfs_ops f2fs_stat_attr_ops = { 1229 .show = f2fs_stat_attr_show, 1230 .store = f2fs_stat_attr_store, 1231 }; 1232 1233 static const struct kobj_type f2fs_stat_ktype = { 1234 .default_groups = f2fs_stat_groups, 1235 .sysfs_ops = &f2fs_stat_attr_ops, 1236 .release = f2fs_stat_kobj_release, 1237 }; 1238 1239 static ssize_t f2fs_sb_feat_attr_show(struct kobject *kobj, 1240 struct attribute *attr, char *buf) 1241 { 1242 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, 1243 s_feature_list_kobj); 1244 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); 1245 1246 return a->show ? a->show(a, sbi, buf) : 0; 1247 } 1248 1249 static void f2fs_feature_list_kobj_release(struct kobject *kobj) 1250 { 1251 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, 1252 s_feature_list_kobj); 1253 complete(&sbi->s_feature_list_kobj_unregister); 1254 } 1255 1256 static const struct sysfs_ops f2fs_feature_list_attr_ops = { 1257 .show = f2fs_sb_feat_attr_show, 1258 }; 1259 1260 static const struct kobj_type f2fs_feature_list_ktype = { 1261 .default_groups = f2fs_sb_feat_groups, 1262 .sysfs_ops = &f2fs_feature_list_attr_ops, 1263 .release = f2fs_feature_list_kobj_release, 1264 }; 1265 1266 static int __maybe_unused segment_info_seq_show(struct seq_file *seq, 1267 void *offset) 1268 { 1269 struct super_block *sb = seq->private; 1270 struct f2fs_sb_info *sbi = F2FS_SB(sb); 1271 unsigned int total_segs = 1272 le32_to_cpu(sbi->raw_super->segment_count_main); 1273 int i; 1274 1275 seq_puts(seq, "format: segment_type|valid_blocks\n" 1276 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); 1277 1278 for (i = 0; i < total_segs; i++) { 1279 struct seg_entry *se = get_seg_entry(sbi, i); 1280 1281 if ((i % 10) == 0) 1282 seq_printf(seq, "%-10d", i); 1283 seq_printf(seq, "%d|%-3u", se->type, se->valid_blocks); 1284 if ((i % 10) == 9 || i == (total_segs - 1)) 1285 seq_putc(seq, '\n'); 1286 else 1287 seq_putc(seq, ' '); 1288 } 1289 1290 return 0; 1291 } 1292 1293 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq, 1294 void *offset) 1295 { 1296 struct super_block *sb = seq->private; 1297 struct f2fs_sb_info *sbi = F2FS_SB(sb); 1298 unsigned int total_segs = 1299 le32_to_cpu(sbi->raw_super->segment_count_main); 1300 int i, j; 1301 1302 seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n" 1303 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); 1304 1305 for (i = 0; i < total_segs; i++) { 1306 struct seg_entry *se = get_seg_entry(sbi, i); 1307 1308 seq_printf(seq, "%-10d", i); 1309 seq_printf(seq, "%d|%-3u|", se->type, se->valid_blocks); 1310 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++) 1311 seq_printf(seq, " %.2x", se->cur_valid_map[j]); 1312 seq_putc(seq, '\n'); 1313 } 1314 return 0; 1315 } 1316 1317 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq, 1318 void *offset) 1319 { 1320 struct super_block *sb = seq->private; 1321 struct f2fs_sb_info *sbi = F2FS_SB(sb); 1322 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); 1323 int i; 1324 1325 seq_puts(seq, "format: victim_secmap bitmaps\n"); 1326 1327 for (i = 0; i < MAIN_SECS(sbi); i++) { 1328 if ((i % 10) == 0) 1329 seq_printf(seq, "%-10d", i); 1330 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0); 1331 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1)) 1332 seq_putc(seq, '\n'); 1333 else 1334 seq_putc(seq, ' '); 1335 } 1336 return 0; 1337 } 1338 1339 static int __maybe_unused discard_plist_seq_show(struct seq_file *seq, 1340 void *offset) 1341 { 1342 struct super_block *sb = seq->private; 1343 struct f2fs_sb_info *sbi = F2FS_SB(sb); 1344 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; 1345 int i, count; 1346 1347 seq_puts(seq, "Discard pend list(Show diacrd_cmd count on each entry, .:not exist):\n"); 1348 if (!f2fs_realtime_discard_enable(sbi)) 1349 return 0; 1350 1351 if (dcc) { 1352 mutex_lock(&dcc->cmd_lock); 1353 for (i = 0; i < MAX_PLIST_NUM; i++) { 1354 struct list_head *pend_list; 1355 struct discard_cmd *dc, *tmp; 1356 1357 if (i % 8 == 0) 1358 seq_printf(seq, " %-3d", i); 1359 count = 0; 1360 pend_list = &dcc->pend_list[i]; 1361 list_for_each_entry_safe(dc, tmp, pend_list, list) 1362 count++; 1363 if (count) 1364 seq_printf(seq, " %7d", count); 1365 else 1366 seq_puts(seq, " ."); 1367 if (i % 8 == 7) 1368 seq_putc(seq, '\n'); 1369 } 1370 seq_putc(seq, '\n'); 1371 mutex_unlock(&dcc->cmd_lock); 1372 } 1373 1374 return 0; 1375 } 1376 1377 int __init f2fs_init_sysfs(void) 1378 { 1379 int ret; 1380 1381 kobject_set_name(&f2fs_kset.kobj, "f2fs"); 1382 f2fs_kset.kobj.parent = fs_kobj; 1383 ret = kset_register(&f2fs_kset); 1384 if (ret) 1385 return ret; 1386 1387 ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype, 1388 NULL, "features"); 1389 if (ret) { 1390 kobject_put(&f2fs_feat); 1391 kset_unregister(&f2fs_kset); 1392 } else { 1393 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); 1394 } 1395 return ret; 1396 } 1397 1398 void f2fs_exit_sysfs(void) 1399 { 1400 kobject_put(&f2fs_feat); 1401 kset_unregister(&f2fs_kset); 1402 remove_proc_entry("fs/f2fs", NULL); 1403 f2fs_proc_root = NULL; 1404 } 1405 1406 int f2fs_register_sysfs(struct f2fs_sb_info *sbi) 1407 { 1408 struct super_block *sb = sbi->sb; 1409 int err; 1410 1411 sbi->s_kobj.kset = &f2fs_kset; 1412 init_completion(&sbi->s_kobj_unregister); 1413 err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL, 1414 "%s", sb->s_id); 1415 if (err) 1416 goto put_sb_kobj; 1417 1418 sbi->s_stat_kobj.kset = &f2fs_kset; 1419 init_completion(&sbi->s_stat_kobj_unregister); 1420 err = kobject_init_and_add(&sbi->s_stat_kobj, &f2fs_stat_ktype, 1421 &sbi->s_kobj, "stat"); 1422 if (err) 1423 goto put_stat_kobj; 1424 1425 sbi->s_feature_list_kobj.kset = &f2fs_kset; 1426 init_completion(&sbi->s_feature_list_kobj_unregister); 1427 err = kobject_init_and_add(&sbi->s_feature_list_kobj, 1428 &f2fs_feature_list_ktype, 1429 &sbi->s_kobj, "feature_list"); 1430 if (err) 1431 goto put_feature_list_kobj; 1432 1433 if (f2fs_proc_root) 1434 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); 1435 1436 if (sbi->s_proc) { 1437 proc_create_single_data("segment_info", 0444, sbi->s_proc, 1438 segment_info_seq_show, sb); 1439 proc_create_single_data("segment_bits", 0444, sbi->s_proc, 1440 segment_bits_seq_show, sb); 1441 #ifdef CONFIG_F2FS_IOSTAT 1442 proc_create_single_data("iostat_info", 0444, sbi->s_proc, 1443 iostat_info_seq_show, sb); 1444 #endif 1445 proc_create_single_data("victim_bits", 0444, sbi->s_proc, 1446 victim_bits_seq_show, sb); 1447 proc_create_single_data("discard_plist_info", 0444, sbi->s_proc, 1448 discard_plist_seq_show, sb); 1449 } 1450 return 0; 1451 put_feature_list_kobj: 1452 kobject_put(&sbi->s_feature_list_kobj); 1453 wait_for_completion(&sbi->s_feature_list_kobj_unregister); 1454 put_stat_kobj: 1455 kobject_put(&sbi->s_stat_kobj); 1456 wait_for_completion(&sbi->s_stat_kobj_unregister); 1457 put_sb_kobj: 1458 kobject_put(&sbi->s_kobj); 1459 wait_for_completion(&sbi->s_kobj_unregister); 1460 return err; 1461 } 1462 1463 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi) 1464 { 1465 if (sbi->s_proc) 1466 remove_proc_subtree(sbi->sb->s_id, f2fs_proc_root); 1467 1468 kobject_put(&sbi->s_stat_kobj); 1469 wait_for_completion(&sbi->s_stat_kobj_unregister); 1470 kobject_put(&sbi->s_feature_list_kobj); 1471 wait_for_completion(&sbi->s_feature_list_kobj_unregister); 1472 1473 kobject_put(&sbi->s_kobj); 1474 wait_for_completion(&sbi->s_kobj_unregister); 1475 } 1476