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