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