1 /* 2 * f2fs sysfs interface 3 * 4 * Copyright (c) 2012 Samsung Electronics Co., Ltd. 5 * http://www.samsung.com/ 6 * Copyright (c) 2017 Chao Yu <chao@kernel.org> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 #include <linux/compiler.h> 13 #include <linux/proc_fs.h> 14 #include <linux/f2fs_fs.h> 15 #include <linux/seq_file.h> 16 17 #include "f2fs.h" 18 #include "segment.h" 19 #include "gc.h" 20 21 static struct proc_dir_entry *f2fs_proc_root; 22 23 /* Sysfs support for f2fs */ 24 enum { 25 GC_THREAD, /* struct f2fs_gc_thread */ 26 SM_INFO, /* struct f2fs_sm_info */ 27 DCC_INFO, /* struct discard_cmd_control */ 28 NM_INFO, /* struct f2fs_nm_info */ 29 F2FS_SBI, /* struct f2fs_sb_info */ 30 #ifdef CONFIG_F2FS_FAULT_INJECTION 31 FAULT_INFO_RATE, /* struct f2fs_fault_info */ 32 FAULT_INFO_TYPE, /* struct f2fs_fault_info */ 33 #endif 34 RESERVED_BLOCKS, /* struct f2fs_sb_info */ 35 }; 36 37 struct f2fs_attr { 38 struct attribute attr; 39 ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *); 40 ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *, 41 const char *, size_t); 42 int struct_type; 43 int offset; 44 int id; 45 }; 46 47 static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type) 48 { 49 if (struct_type == GC_THREAD) 50 return (unsigned char *)sbi->gc_thread; 51 else if (struct_type == SM_INFO) 52 return (unsigned char *)SM_I(sbi); 53 else if (struct_type == DCC_INFO) 54 return (unsigned char *)SM_I(sbi)->dcc_info; 55 else if (struct_type == NM_INFO) 56 return (unsigned char *)NM_I(sbi); 57 else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS) 58 return (unsigned char *)sbi; 59 #ifdef CONFIG_F2FS_FAULT_INJECTION 60 else if (struct_type == FAULT_INFO_RATE || 61 struct_type == FAULT_INFO_TYPE) 62 return (unsigned char *)&F2FS_OPTION(sbi).fault_info; 63 #endif 64 return NULL; 65 } 66 67 static ssize_t dirty_segments_show(struct f2fs_attr *a, 68 struct f2fs_sb_info *sbi, char *buf) 69 { 70 return snprintf(buf, PAGE_SIZE, "%llu\n", 71 (unsigned long long)(dirty_segments(sbi))); 72 } 73 74 static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a, 75 struct f2fs_sb_info *sbi, char *buf) 76 { 77 struct super_block *sb = sbi->sb; 78 79 if (!sb->s_bdev->bd_part) 80 return snprintf(buf, PAGE_SIZE, "0\n"); 81 82 return snprintf(buf, PAGE_SIZE, "%llu\n", 83 (unsigned long long)(sbi->kbytes_written + 84 BD_PART_WRITTEN(sbi))); 85 } 86 87 static ssize_t features_show(struct f2fs_attr *a, 88 struct f2fs_sb_info *sbi, char *buf) 89 { 90 struct super_block *sb = sbi->sb; 91 int len = 0; 92 93 if (!sb->s_bdev->bd_part) 94 return snprintf(buf, PAGE_SIZE, "0\n"); 95 96 if (f2fs_sb_has_encrypt(sb)) 97 len += snprintf(buf, PAGE_SIZE - len, "%s", 98 "encryption"); 99 if (f2fs_sb_has_blkzoned(sb)) 100 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 101 len ? ", " : "", "blkzoned"); 102 if (f2fs_sb_has_extra_attr(sb)) 103 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 104 len ? ", " : "", "extra_attr"); 105 if (f2fs_sb_has_project_quota(sb)) 106 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 107 len ? ", " : "", "projquota"); 108 if (f2fs_sb_has_inode_chksum(sb)) 109 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 110 len ? ", " : "", "inode_checksum"); 111 if (f2fs_sb_has_flexible_inline_xattr(sb)) 112 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 113 len ? ", " : "", "flexible_inline_xattr"); 114 if (f2fs_sb_has_quota_ino(sb)) 115 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 116 len ? ", " : "", "quota_ino"); 117 if (f2fs_sb_has_inode_crtime(sb)) 118 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 119 len ? ", " : "", "inode_crtime"); 120 if (f2fs_sb_has_lost_found(sb)) 121 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 122 len ? ", " : "", "lost_found"); 123 len += snprintf(buf + len, PAGE_SIZE - len, "\n"); 124 return len; 125 } 126 127 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a, 128 struct f2fs_sb_info *sbi, char *buf) 129 { 130 return snprintf(buf, PAGE_SIZE, "%u\n", sbi->current_reserved_blocks); 131 } 132 133 static ssize_t f2fs_sbi_show(struct f2fs_attr *a, 134 struct f2fs_sb_info *sbi, char *buf) 135 { 136 unsigned char *ptr = NULL; 137 unsigned int *ui; 138 139 ptr = __struct_ptr(sbi, a->struct_type); 140 if (!ptr) 141 return -EINVAL; 142 143 if (!strcmp(a->attr.name, "extension_list")) { 144 __u8 (*extlist)[F2FS_EXTENSION_LEN] = 145 sbi->raw_super->extension_list; 146 int cold_count = le32_to_cpu(sbi->raw_super->extension_count); 147 int hot_count = sbi->raw_super->hot_ext_count; 148 int len = 0, i; 149 150 len += snprintf(buf + len, PAGE_SIZE - len, 151 "cold file extension:\n"); 152 for (i = 0; i < cold_count; i++) 153 len += snprintf(buf + len, PAGE_SIZE - len, "%s\n", 154 extlist[i]); 155 156 len += snprintf(buf + len, PAGE_SIZE - len, 157 "hot file extension:\n"); 158 for (i = cold_count; i < cold_count + hot_count; i++) 159 len += snprintf(buf + len, PAGE_SIZE - len, "%s\n", 160 extlist[i]); 161 return len; 162 } 163 164 ui = (unsigned int *)(ptr + a->offset); 165 166 return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 167 } 168 169 static ssize_t __sbi_store(struct f2fs_attr *a, 170 struct f2fs_sb_info *sbi, 171 const char *buf, size_t count) 172 { 173 unsigned char *ptr; 174 unsigned long t; 175 unsigned int *ui; 176 ssize_t ret; 177 178 ptr = __struct_ptr(sbi, a->struct_type); 179 if (!ptr) 180 return -EINVAL; 181 182 if (!strcmp(a->attr.name, "extension_list")) { 183 const char *name = strim((char *)buf); 184 bool set = true, hot; 185 186 if (!strncmp(name, "[h]", 3)) 187 hot = true; 188 else if (!strncmp(name, "[c]", 3)) 189 hot = false; 190 else 191 return -EINVAL; 192 193 name += 3; 194 195 if (*name == '!') { 196 name++; 197 set = false; 198 } 199 200 if (strlen(name) >= F2FS_EXTENSION_LEN) 201 return -EINVAL; 202 203 down_write(&sbi->sb_lock); 204 205 ret = f2fs_update_extension_list(sbi, name, hot, set); 206 if (ret) 207 goto out; 208 209 ret = f2fs_commit_super(sbi, false); 210 if (ret) 211 f2fs_update_extension_list(sbi, name, hot, !set); 212 out: 213 up_write(&sbi->sb_lock); 214 return ret ? ret : count; 215 } 216 217 ui = (unsigned int *)(ptr + a->offset); 218 219 ret = kstrtoul(skip_spaces(buf), 0, &t); 220 if (ret < 0) 221 return ret; 222 #ifdef CONFIG_F2FS_FAULT_INJECTION 223 if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX)) 224 return -EINVAL; 225 #endif 226 if (a->struct_type == RESERVED_BLOCKS) { 227 spin_lock(&sbi->stat_lock); 228 if (t > (unsigned long)(sbi->user_block_count - 229 F2FS_OPTION(sbi).root_reserved_blocks)) { 230 spin_unlock(&sbi->stat_lock); 231 return -EINVAL; 232 } 233 *ui = t; 234 sbi->current_reserved_blocks = min(sbi->reserved_blocks, 235 sbi->user_block_count - valid_user_blocks(sbi)); 236 spin_unlock(&sbi->stat_lock); 237 return count; 238 } 239 240 if (!strcmp(a->attr.name, "discard_granularity")) { 241 if (t == 0 || t > MAX_PLIST_NUM) 242 return -EINVAL; 243 if (t == *ui) 244 return count; 245 *ui = t; 246 return count; 247 } 248 249 if (!strcmp(a->attr.name, "trim_sections")) 250 return -EINVAL; 251 252 if (!strcmp(a->attr.name, "gc_urgent")) { 253 if (t >= 1) { 254 sbi->gc_mode = GC_URGENT; 255 if (sbi->gc_thread) { 256 sbi->gc_thread->gc_wake = 1; 257 wake_up_interruptible_all( 258 &sbi->gc_thread->gc_wait_queue_head); 259 wake_up_discard_thread(sbi, true); 260 } 261 } else { 262 sbi->gc_mode = GC_NORMAL; 263 } 264 return count; 265 } 266 if (!strcmp(a->attr.name, "gc_idle")) { 267 if (t == GC_IDLE_CB) 268 sbi->gc_mode = GC_IDLE_CB; 269 else if (t == GC_IDLE_GREEDY) 270 sbi->gc_mode = GC_IDLE_GREEDY; 271 else 272 sbi->gc_mode = GC_NORMAL; 273 return count; 274 } 275 276 *ui = t; 277 278 if (!strcmp(a->attr.name, "iostat_enable") && *ui == 0) 279 f2fs_reset_iostat(sbi); 280 return count; 281 } 282 283 static ssize_t f2fs_sbi_store(struct f2fs_attr *a, 284 struct f2fs_sb_info *sbi, 285 const char *buf, size_t count) 286 { 287 ssize_t ret; 288 bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") || 289 a->struct_type == GC_THREAD); 290 291 if (gc_entry) { 292 if (!down_read_trylock(&sbi->sb->s_umount)) 293 return -EAGAIN; 294 } 295 ret = __sbi_store(a, sbi, buf, count); 296 if (gc_entry) 297 up_read(&sbi->sb->s_umount); 298 299 return ret; 300 } 301 302 static ssize_t f2fs_attr_show(struct kobject *kobj, 303 struct attribute *attr, char *buf) 304 { 305 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, 306 s_kobj); 307 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); 308 309 return a->show ? a->show(a, sbi, buf) : 0; 310 } 311 312 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr, 313 const char *buf, size_t len) 314 { 315 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, 316 s_kobj); 317 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); 318 319 return a->store ? a->store(a, sbi, buf, len) : 0; 320 } 321 322 static void f2fs_sb_release(struct kobject *kobj) 323 { 324 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, 325 s_kobj); 326 complete(&sbi->s_kobj_unregister); 327 } 328 329 enum feat_id { 330 FEAT_CRYPTO = 0, 331 FEAT_BLKZONED, 332 FEAT_ATOMIC_WRITE, 333 FEAT_EXTRA_ATTR, 334 FEAT_PROJECT_QUOTA, 335 FEAT_INODE_CHECKSUM, 336 FEAT_FLEXIBLE_INLINE_XATTR, 337 FEAT_QUOTA_INO, 338 FEAT_INODE_CRTIME, 339 FEAT_LOST_FOUND, 340 }; 341 342 static ssize_t f2fs_feature_show(struct f2fs_attr *a, 343 struct f2fs_sb_info *sbi, char *buf) 344 { 345 switch (a->id) { 346 case FEAT_CRYPTO: 347 case FEAT_BLKZONED: 348 case FEAT_ATOMIC_WRITE: 349 case FEAT_EXTRA_ATTR: 350 case FEAT_PROJECT_QUOTA: 351 case FEAT_INODE_CHECKSUM: 352 case FEAT_FLEXIBLE_INLINE_XATTR: 353 case FEAT_QUOTA_INO: 354 case FEAT_INODE_CRTIME: 355 case FEAT_LOST_FOUND: 356 return snprintf(buf, PAGE_SIZE, "supported\n"); 357 } 358 return 0; 359 } 360 361 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \ 362 static struct f2fs_attr f2fs_attr_##_name = { \ 363 .attr = {.name = __stringify(_name), .mode = _mode }, \ 364 .show = _show, \ 365 .store = _store, \ 366 .struct_type = _struct_type, \ 367 .offset = _offset \ 368 } 369 370 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \ 371 F2FS_ATTR_OFFSET(struct_type, name, 0644, \ 372 f2fs_sbi_show, f2fs_sbi_store, \ 373 offsetof(struct struct_name, elname)) 374 375 #define F2FS_GENERAL_RO_ATTR(name) \ 376 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL) 377 378 #define F2FS_FEATURE_RO_ATTR(_name, _id) \ 379 static struct f2fs_attr f2fs_attr_##_name = { \ 380 .attr = {.name = __stringify(_name), .mode = 0444 }, \ 381 .show = f2fs_feature_show, \ 382 .id = _id, \ 383 } 384 385 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time, 386 urgent_sleep_time); 387 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time); 388 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time); 389 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time); 390 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle, gc_mode); 391 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent, gc_mode); 392 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); 393 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards); 394 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity); 395 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks); 396 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections); 397 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy); 398 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util); 399 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks); 400 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_seq_blocks, min_seq_blocks); 401 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks); 402 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections); 403 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh); 404 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages); 405 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio); 406 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search); 407 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level); 408 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]); 409 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]); 410 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable); 411 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra); 412 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold); 413 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list); 414 #ifdef CONFIG_F2FS_FAULT_INJECTION 415 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate); 416 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type); 417 #endif 418 F2FS_GENERAL_RO_ATTR(dirty_segments); 419 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes); 420 F2FS_GENERAL_RO_ATTR(features); 421 F2FS_GENERAL_RO_ATTR(current_reserved_blocks); 422 423 #ifdef CONFIG_F2FS_FS_ENCRYPTION 424 F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO); 425 #endif 426 #ifdef CONFIG_BLK_DEV_ZONED 427 F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED); 428 #endif 429 F2FS_FEATURE_RO_ATTR(atomic_write, FEAT_ATOMIC_WRITE); 430 F2FS_FEATURE_RO_ATTR(extra_attr, FEAT_EXTRA_ATTR); 431 F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA); 432 F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM); 433 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr, FEAT_FLEXIBLE_INLINE_XATTR); 434 F2FS_FEATURE_RO_ATTR(quota_ino, FEAT_QUOTA_INO); 435 F2FS_FEATURE_RO_ATTR(inode_crtime, FEAT_INODE_CRTIME); 436 F2FS_FEATURE_RO_ATTR(lost_found, FEAT_LOST_FOUND); 437 438 #define ATTR_LIST(name) (&f2fs_attr_##name.attr) 439 static struct attribute *f2fs_attrs[] = { 440 ATTR_LIST(gc_urgent_sleep_time), 441 ATTR_LIST(gc_min_sleep_time), 442 ATTR_LIST(gc_max_sleep_time), 443 ATTR_LIST(gc_no_gc_sleep_time), 444 ATTR_LIST(gc_idle), 445 ATTR_LIST(gc_urgent), 446 ATTR_LIST(reclaim_segments), 447 ATTR_LIST(max_small_discards), 448 ATTR_LIST(discard_granularity), 449 ATTR_LIST(batched_trim_sections), 450 ATTR_LIST(ipu_policy), 451 ATTR_LIST(min_ipu_util), 452 ATTR_LIST(min_fsync_blocks), 453 ATTR_LIST(min_seq_blocks), 454 ATTR_LIST(min_hot_blocks), 455 ATTR_LIST(min_ssr_sections), 456 ATTR_LIST(max_victim_search), 457 ATTR_LIST(dir_level), 458 ATTR_LIST(ram_thresh), 459 ATTR_LIST(ra_nid_pages), 460 ATTR_LIST(dirty_nats_ratio), 461 ATTR_LIST(cp_interval), 462 ATTR_LIST(idle_interval), 463 ATTR_LIST(iostat_enable), 464 ATTR_LIST(readdir_ra), 465 ATTR_LIST(gc_pin_file_thresh), 466 ATTR_LIST(extension_list), 467 #ifdef CONFIG_F2FS_FAULT_INJECTION 468 ATTR_LIST(inject_rate), 469 ATTR_LIST(inject_type), 470 #endif 471 ATTR_LIST(dirty_segments), 472 ATTR_LIST(lifetime_write_kbytes), 473 ATTR_LIST(features), 474 ATTR_LIST(reserved_blocks), 475 ATTR_LIST(current_reserved_blocks), 476 NULL, 477 }; 478 479 static struct attribute *f2fs_feat_attrs[] = { 480 #ifdef CONFIG_F2FS_FS_ENCRYPTION 481 ATTR_LIST(encryption), 482 #endif 483 #ifdef CONFIG_BLK_DEV_ZONED 484 ATTR_LIST(block_zoned), 485 #endif 486 ATTR_LIST(atomic_write), 487 ATTR_LIST(extra_attr), 488 ATTR_LIST(project_quota), 489 ATTR_LIST(inode_checksum), 490 ATTR_LIST(flexible_inline_xattr), 491 ATTR_LIST(quota_ino), 492 ATTR_LIST(inode_crtime), 493 ATTR_LIST(lost_found), 494 NULL, 495 }; 496 497 static const struct sysfs_ops f2fs_attr_ops = { 498 .show = f2fs_attr_show, 499 .store = f2fs_attr_store, 500 }; 501 502 static struct kobj_type f2fs_sb_ktype = { 503 .default_attrs = f2fs_attrs, 504 .sysfs_ops = &f2fs_attr_ops, 505 .release = f2fs_sb_release, 506 }; 507 508 static struct kobj_type f2fs_ktype = { 509 .sysfs_ops = &f2fs_attr_ops, 510 }; 511 512 static struct kset f2fs_kset = { 513 .kobj = {.ktype = &f2fs_ktype}, 514 }; 515 516 static struct kobj_type f2fs_feat_ktype = { 517 .default_attrs = f2fs_feat_attrs, 518 .sysfs_ops = &f2fs_attr_ops, 519 }; 520 521 static struct kobject f2fs_feat = { 522 .kset = &f2fs_kset, 523 }; 524 525 static int __maybe_unused segment_info_seq_show(struct seq_file *seq, 526 void *offset) 527 { 528 struct super_block *sb = seq->private; 529 struct f2fs_sb_info *sbi = F2FS_SB(sb); 530 unsigned int total_segs = 531 le32_to_cpu(sbi->raw_super->segment_count_main); 532 int i; 533 534 seq_puts(seq, "format: segment_type|valid_blocks\n" 535 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); 536 537 for (i = 0; i < total_segs; i++) { 538 struct seg_entry *se = get_seg_entry(sbi, i); 539 540 if ((i % 10) == 0) 541 seq_printf(seq, "%-10d", i); 542 seq_printf(seq, "%d|%-3u", se->type, 543 get_valid_blocks(sbi, i, false)); 544 if ((i % 10) == 9 || i == (total_segs - 1)) 545 seq_putc(seq, '\n'); 546 else 547 seq_putc(seq, ' '); 548 } 549 550 return 0; 551 } 552 553 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq, 554 void *offset) 555 { 556 struct super_block *sb = seq->private; 557 struct f2fs_sb_info *sbi = F2FS_SB(sb); 558 unsigned int total_segs = 559 le32_to_cpu(sbi->raw_super->segment_count_main); 560 int i, j; 561 562 seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n" 563 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); 564 565 for (i = 0; i < total_segs; i++) { 566 struct seg_entry *se = get_seg_entry(sbi, i); 567 568 seq_printf(seq, "%-10d", i); 569 seq_printf(seq, "%d|%-3u|", se->type, 570 get_valid_blocks(sbi, i, false)); 571 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++) 572 seq_printf(seq, " %.2x", se->cur_valid_map[j]); 573 seq_putc(seq, '\n'); 574 } 575 return 0; 576 } 577 578 static int __maybe_unused iostat_info_seq_show(struct seq_file *seq, 579 void *offset) 580 { 581 struct super_block *sb = seq->private; 582 struct f2fs_sb_info *sbi = F2FS_SB(sb); 583 time64_t now = ktime_get_real_seconds(); 584 585 if (!sbi->iostat_enable) 586 return 0; 587 588 seq_printf(seq, "time: %-16llu\n", now); 589 590 /* print app IOs */ 591 seq_printf(seq, "app buffered: %-16llu\n", 592 sbi->write_iostat[APP_BUFFERED_IO]); 593 seq_printf(seq, "app direct: %-16llu\n", 594 sbi->write_iostat[APP_DIRECT_IO]); 595 seq_printf(seq, "app mapped: %-16llu\n", 596 sbi->write_iostat[APP_MAPPED_IO]); 597 598 /* print fs IOs */ 599 seq_printf(seq, "fs data: %-16llu\n", 600 sbi->write_iostat[FS_DATA_IO]); 601 seq_printf(seq, "fs node: %-16llu\n", 602 sbi->write_iostat[FS_NODE_IO]); 603 seq_printf(seq, "fs meta: %-16llu\n", 604 sbi->write_iostat[FS_META_IO]); 605 seq_printf(seq, "fs gc data: %-16llu\n", 606 sbi->write_iostat[FS_GC_DATA_IO]); 607 seq_printf(seq, "fs gc node: %-16llu\n", 608 sbi->write_iostat[FS_GC_NODE_IO]); 609 seq_printf(seq, "fs cp data: %-16llu\n", 610 sbi->write_iostat[FS_CP_DATA_IO]); 611 seq_printf(seq, "fs cp node: %-16llu\n", 612 sbi->write_iostat[FS_CP_NODE_IO]); 613 seq_printf(seq, "fs cp meta: %-16llu\n", 614 sbi->write_iostat[FS_CP_META_IO]); 615 seq_printf(seq, "fs discard: %-16llu\n", 616 sbi->write_iostat[FS_DISCARD]); 617 618 return 0; 619 } 620 621 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq, 622 void *offset) 623 { 624 struct super_block *sb = seq->private; 625 struct f2fs_sb_info *sbi = F2FS_SB(sb); 626 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); 627 int i; 628 629 seq_puts(seq, "format: victim_secmap bitmaps\n"); 630 631 for (i = 0; i < MAIN_SECS(sbi); i++) { 632 if ((i % 10) == 0) 633 seq_printf(seq, "%-10d", i); 634 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0); 635 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1)) 636 seq_putc(seq, '\n'); 637 else 638 seq_putc(seq, ' '); 639 } 640 return 0; 641 } 642 643 int __init f2fs_init_sysfs(void) 644 { 645 int ret; 646 647 kobject_set_name(&f2fs_kset.kobj, "f2fs"); 648 f2fs_kset.kobj.parent = fs_kobj; 649 ret = kset_register(&f2fs_kset); 650 if (ret) 651 return ret; 652 653 ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype, 654 NULL, "features"); 655 if (ret) 656 kset_unregister(&f2fs_kset); 657 else 658 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); 659 return ret; 660 } 661 662 void f2fs_exit_sysfs(void) 663 { 664 kobject_put(&f2fs_feat); 665 kset_unregister(&f2fs_kset); 666 remove_proc_entry("fs/f2fs", NULL); 667 f2fs_proc_root = NULL; 668 } 669 670 int f2fs_register_sysfs(struct f2fs_sb_info *sbi) 671 { 672 struct super_block *sb = sbi->sb; 673 int err; 674 675 sbi->s_kobj.kset = &f2fs_kset; 676 init_completion(&sbi->s_kobj_unregister); 677 err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL, 678 "%s", sb->s_id); 679 if (err) 680 return err; 681 682 if (f2fs_proc_root) 683 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); 684 685 if (sbi->s_proc) { 686 proc_create_single_data("segment_info", S_IRUGO, sbi->s_proc, 687 segment_info_seq_show, sb); 688 proc_create_single_data("segment_bits", S_IRUGO, sbi->s_proc, 689 segment_bits_seq_show, sb); 690 proc_create_single_data("iostat_info", S_IRUGO, sbi->s_proc, 691 iostat_info_seq_show, sb); 692 proc_create_single_data("victim_bits", S_IRUGO, sbi->s_proc, 693 victim_bits_seq_show, sb); 694 } 695 return 0; 696 } 697 698 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi) 699 { 700 if (sbi->s_proc) { 701 remove_proc_entry("iostat_info", sbi->s_proc); 702 remove_proc_entry("segment_info", sbi->s_proc); 703 remove_proc_entry("segment_bits", sbi->s_proc); 704 remove_proc_entry("victim_bits", sbi->s_proc); 705 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root); 706 } 707 kobject_del(&sbi->s_kobj); 708 } 709