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