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 14 #include "f2fs.h" 15 #include "segment.h" 16 #include "gc.h" 17 18 static struct proc_dir_entry *f2fs_proc_root; 19 20 /* Sysfs support for f2fs */ 21 enum { 22 GC_THREAD, /* struct f2fs_gc_thread */ 23 SM_INFO, /* struct f2fs_sm_info */ 24 DCC_INFO, /* struct discard_cmd_control */ 25 NM_INFO, /* struct f2fs_nm_info */ 26 F2FS_SBI, /* struct f2fs_sb_info */ 27 #ifdef CONFIG_F2FS_FAULT_INJECTION 28 FAULT_INFO_RATE, /* struct f2fs_fault_info */ 29 FAULT_INFO_TYPE, /* struct f2fs_fault_info */ 30 #endif 31 RESERVED_BLOCKS, /* struct f2fs_sb_info */ 32 }; 33 34 struct f2fs_attr { 35 struct attribute attr; 36 ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *); 37 ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *, 38 const char *, size_t); 39 int struct_type; 40 int offset; 41 int id; 42 }; 43 44 static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type) 45 { 46 if (struct_type == GC_THREAD) 47 return (unsigned char *)sbi->gc_thread; 48 else if (struct_type == SM_INFO) 49 return (unsigned char *)SM_I(sbi); 50 else if (struct_type == DCC_INFO) 51 return (unsigned char *)SM_I(sbi)->dcc_info; 52 else if (struct_type == NM_INFO) 53 return (unsigned char *)NM_I(sbi); 54 else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS) 55 return (unsigned char *)sbi; 56 #ifdef CONFIG_F2FS_FAULT_INJECTION 57 else if (struct_type == FAULT_INFO_RATE || 58 struct_type == FAULT_INFO_TYPE) 59 return (unsigned char *)&F2FS_OPTION(sbi).fault_info; 60 #endif 61 return NULL; 62 } 63 64 static ssize_t dirty_segments_show(struct f2fs_attr *a, 65 struct f2fs_sb_info *sbi, char *buf) 66 { 67 return snprintf(buf, PAGE_SIZE, "%llu\n", 68 (unsigned long long)(dirty_segments(sbi))); 69 } 70 71 static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a, 72 struct f2fs_sb_info *sbi, char *buf) 73 { 74 struct super_block *sb = sbi->sb; 75 76 if (!sb->s_bdev->bd_part) 77 return snprintf(buf, PAGE_SIZE, "0\n"); 78 79 return snprintf(buf, PAGE_SIZE, "%llu\n", 80 (unsigned long long)(sbi->kbytes_written + 81 BD_PART_WRITTEN(sbi))); 82 } 83 84 static ssize_t features_show(struct f2fs_attr *a, 85 struct f2fs_sb_info *sbi, char *buf) 86 { 87 struct super_block *sb = sbi->sb; 88 int len = 0; 89 90 if (!sb->s_bdev->bd_part) 91 return snprintf(buf, PAGE_SIZE, "0\n"); 92 93 if (f2fs_sb_has_encrypt(sbi)) 94 len += snprintf(buf, PAGE_SIZE - len, "%s", 95 "encryption"); 96 if (f2fs_sb_has_blkzoned(sbi)) 97 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 98 len ? ", " : "", "blkzoned"); 99 if (f2fs_sb_has_extra_attr(sbi)) 100 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 101 len ? ", " : "", "extra_attr"); 102 if (f2fs_sb_has_project_quota(sbi)) 103 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 104 len ? ", " : "", "projquota"); 105 if (f2fs_sb_has_inode_chksum(sbi)) 106 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 107 len ? ", " : "", "inode_checksum"); 108 if (f2fs_sb_has_flexible_inline_xattr(sbi)) 109 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 110 len ? ", " : "", "flexible_inline_xattr"); 111 if (f2fs_sb_has_quota_ino(sbi)) 112 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 113 len ? ", " : "", "quota_ino"); 114 if (f2fs_sb_has_inode_crtime(sbi)) 115 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 116 len ? ", " : "", "inode_crtime"); 117 if (f2fs_sb_has_lost_found(sbi)) 118 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 119 len ? ", " : "", "lost_found"); 120 if (f2fs_sb_has_sb_chksum(sbi)) 121 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 122 len ? ", " : "", "sb_checksum"); 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, "migration_granularity")) { 250 if (t == 0 || t > sbi->segs_per_sec) 251 return -EINVAL; 252 } 253 254 if (!strcmp(a->attr.name, "trim_sections")) 255 return -EINVAL; 256 257 if (!strcmp(a->attr.name, "gc_urgent")) { 258 if (t >= 1) { 259 sbi->gc_mode = GC_URGENT; 260 if (sbi->gc_thread) { 261 sbi->gc_thread->gc_wake = 1; 262 wake_up_interruptible_all( 263 &sbi->gc_thread->gc_wait_queue_head); 264 wake_up_discard_thread(sbi, true); 265 } 266 } else { 267 sbi->gc_mode = GC_NORMAL; 268 } 269 return count; 270 } 271 if (!strcmp(a->attr.name, "gc_idle")) { 272 if (t == GC_IDLE_CB) 273 sbi->gc_mode = GC_IDLE_CB; 274 else if (t == GC_IDLE_GREEDY) 275 sbi->gc_mode = GC_IDLE_GREEDY; 276 else 277 sbi->gc_mode = GC_NORMAL; 278 return count; 279 } 280 281 *ui = t; 282 283 if (!strcmp(a->attr.name, "iostat_enable") && *ui == 0) 284 f2fs_reset_iostat(sbi); 285 return count; 286 } 287 288 static ssize_t f2fs_sbi_store(struct f2fs_attr *a, 289 struct f2fs_sb_info *sbi, 290 const char *buf, size_t count) 291 { 292 ssize_t ret; 293 bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") || 294 a->struct_type == GC_THREAD); 295 296 if (gc_entry) { 297 if (!down_read_trylock(&sbi->sb->s_umount)) 298 return -EAGAIN; 299 } 300 ret = __sbi_store(a, sbi, buf, count); 301 if (gc_entry) 302 up_read(&sbi->sb->s_umount); 303 304 return ret; 305 } 306 307 static ssize_t f2fs_attr_show(struct kobject *kobj, 308 struct attribute *attr, char *buf) 309 { 310 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, 311 s_kobj); 312 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); 313 314 return a->show ? a->show(a, sbi, buf) : 0; 315 } 316 317 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr, 318 const char *buf, size_t len) 319 { 320 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, 321 s_kobj); 322 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); 323 324 return a->store ? a->store(a, sbi, buf, len) : 0; 325 } 326 327 static void f2fs_sb_release(struct kobject *kobj) 328 { 329 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, 330 s_kobj); 331 complete(&sbi->s_kobj_unregister); 332 } 333 334 enum feat_id { 335 FEAT_CRYPTO = 0, 336 FEAT_BLKZONED, 337 FEAT_ATOMIC_WRITE, 338 FEAT_EXTRA_ATTR, 339 FEAT_PROJECT_QUOTA, 340 FEAT_INODE_CHECKSUM, 341 FEAT_FLEXIBLE_INLINE_XATTR, 342 FEAT_QUOTA_INO, 343 FEAT_INODE_CRTIME, 344 FEAT_LOST_FOUND, 345 FEAT_SB_CHECKSUM, 346 }; 347 348 static ssize_t f2fs_feature_show(struct f2fs_attr *a, 349 struct f2fs_sb_info *sbi, char *buf) 350 { 351 switch (a->id) { 352 case FEAT_CRYPTO: 353 case FEAT_BLKZONED: 354 case FEAT_ATOMIC_WRITE: 355 case FEAT_EXTRA_ATTR: 356 case FEAT_PROJECT_QUOTA: 357 case FEAT_INODE_CHECKSUM: 358 case FEAT_FLEXIBLE_INLINE_XATTR: 359 case FEAT_QUOTA_INO: 360 case FEAT_INODE_CRTIME: 361 case FEAT_LOST_FOUND: 362 case FEAT_SB_CHECKSUM: 363 return snprintf(buf, PAGE_SIZE, "supported\n"); 364 } 365 return 0; 366 } 367 368 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \ 369 static struct f2fs_attr f2fs_attr_##_name = { \ 370 .attr = {.name = __stringify(_name), .mode = _mode }, \ 371 .show = _show, \ 372 .store = _store, \ 373 .struct_type = _struct_type, \ 374 .offset = _offset \ 375 } 376 377 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \ 378 F2FS_ATTR_OFFSET(struct_type, name, 0644, \ 379 f2fs_sbi_show, f2fs_sbi_store, \ 380 offsetof(struct struct_name, elname)) 381 382 #define F2FS_GENERAL_RO_ATTR(name) \ 383 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL) 384 385 #define F2FS_FEATURE_RO_ATTR(_name, _id) \ 386 static struct f2fs_attr f2fs_attr_##_name = { \ 387 .attr = {.name = __stringify(_name), .mode = 0444 }, \ 388 .show = f2fs_feature_show, \ 389 .id = _id, \ 390 } 391 392 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time, 393 urgent_sleep_time); 394 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time); 395 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time); 396 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time); 397 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle, gc_mode); 398 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent, gc_mode); 399 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); 400 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards); 401 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity); 402 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks); 403 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections); 404 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy); 405 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util); 406 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks); 407 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_seq_blocks, min_seq_blocks); 408 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks); 409 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections); 410 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh); 411 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages); 412 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio); 413 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search); 414 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, migration_granularity, migration_granularity); 415 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level); 416 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]); 417 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]); 418 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, discard_idle_interval, 419 interval_time[DISCARD_TIME]); 420 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle_interval, interval_time[GC_TIME]); 421 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable); 422 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra); 423 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold); 424 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list); 425 #ifdef CONFIG_F2FS_FAULT_INJECTION 426 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate); 427 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type); 428 #endif 429 F2FS_GENERAL_RO_ATTR(dirty_segments); 430 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes); 431 F2FS_GENERAL_RO_ATTR(features); 432 F2FS_GENERAL_RO_ATTR(current_reserved_blocks); 433 434 #ifdef CONFIG_F2FS_FS_ENCRYPTION 435 F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO); 436 #endif 437 #ifdef CONFIG_BLK_DEV_ZONED 438 F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED); 439 #endif 440 F2FS_FEATURE_RO_ATTR(atomic_write, FEAT_ATOMIC_WRITE); 441 F2FS_FEATURE_RO_ATTR(extra_attr, FEAT_EXTRA_ATTR); 442 F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA); 443 F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM); 444 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr, FEAT_FLEXIBLE_INLINE_XATTR); 445 F2FS_FEATURE_RO_ATTR(quota_ino, FEAT_QUOTA_INO); 446 F2FS_FEATURE_RO_ATTR(inode_crtime, FEAT_INODE_CRTIME); 447 F2FS_FEATURE_RO_ATTR(lost_found, FEAT_LOST_FOUND); 448 F2FS_FEATURE_RO_ATTR(sb_checksum, FEAT_SB_CHECKSUM); 449 450 #define ATTR_LIST(name) (&f2fs_attr_##name.attr) 451 static struct attribute *f2fs_attrs[] = { 452 ATTR_LIST(gc_urgent_sleep_time), 453 ATTR_LIST(gc_min_sleep_time), 454 ATTR_LIST(gc_max_sleep_time), 455 ATTR_LIST(gc_no_gc_sleep_time), 456 ATTR_LIST(gc_idle), 457 ATTR_LIST(gc_urgent), 458 ATTR_LIST(reclaim_segments), 459 ATTR_LIST(max_small_discards), 460 ATTR_LIST(discard_granularity), 461 ATTR_LIST(batched_trim_sections), 462 ATTR_LIST(ipu_policy), 463 ATTR_LIST(min_ipu_util), 464 ATTR_LIST(min_fsync_blocks), 465 ATTR_LIST(min_seq_blocks), 466 ATTR_LIST(min_hot_blocks), 467 ATTR_LIST(min_ssr_sections), 468 ATTR_LIST(max_victim_search), 469 ATTR_LIST(migration_granularity), 470 ATTR_LIST(dir_level), 471 ATTR_LIST(ram_thresh), 472 ATTR_LIST(ra_nid_pages), 473 ATTR_LIST(dirty_nats_ratio), 474 ATTR_LIST(cp_interval), 475 ATTR_LIST(idle_interval), 476 ATTR_LIST(discard_idle_interval), 477 ATTR_LIST(gc_idle_interval), 478 ATTR_LIST(iostat_enable), 479 ATTR_LIST(readdir_ra), 480 ATTR_LIST(gc_pin_file_thresh), 481 ATTR_LIST(extension_list), 482 #ifdef CONFIG_F2FS_FAULT_INJECTION 483 ATTR_LIST(inject_rate), 484 ATTR_LIST(inject_type), 485 #endif 486 ATTR_LIST(dirty_segments), 487 ATTR_LIST(lifetime_write_kbytes), 488 ATTR_LIST(features), 489 ATTR_LIST(reserved_blocks), 490 ATTR_LIST(current_reserved_blocks), 491 NULL, 492 }; 493 494 static struct attribute *f2fs_feat_attrs[] = { 495 #ifdef CONFIG_F2FS_FS_ENCRYPTION 496 ATTR_LIST(encryption), 497 #endif 498 #ifdef CONFIG_BLK_DEV_ZONED 499 ATTR_LIST(block_zoned), 500 #endif 501 ATTR_LIST(atomic_write), 502 ATTR_LIST(extra_attr), 503 ATTR_LIST(project_quota), 504 ATTR_LIST(inode_checksum), 505 ATTR_LIST(flexible_inline_xattr), 506 ATTR_LIST(quota_ino), 507 ATTR_LIST(inode_crtime), 508 ATTR_LIST(lost_found), 509 ATTR_LIST(sb_checksum), 510 NULL, 511 }; 512 513 static const struct sysfs_ops f2fs_attr_ops = { 514 .show = f2fs_attr_show, 515 .store = f2fs_attr_store, 516 }; 517 518 static struct kobj_type f2fs_sb_ktype = { 519 .default_attrs = f2fs_attrs, 520 .sysfs_ops = &f2fs_attr_ops, 521 .release = f2fs_sb_release, 522 }; 523 524 static struct kobj_type f2fs_ktype = { 525 .sysfs_ops = &f2fs_attr_ops, 526 }; 527 528 static struct kset f2fs_kset = { 529 .kobj = {.ktype = &f2fs_ktype}, 530 }; 531 532 static struct kobj_type f2fs_feat_ktype = { 533 .default_attrs = f2fs_feat_attrs, 534 .sysfs_ops = &f2fs_attr_ops, 535 }; 536 537 static struct kobject f2fs_feat = { 538 .kset = &f2fs_kset, 539 }; 540 541 static int __maybe_unused segment_info_seq_show(struct seq_file *seq, 542 void *offset) 543 { 544 struct super_block *sb = seq->private; 545 struct f2fs_sb_info *sbi = F2FS_SB(sb); 546 unsigned int total_segs = 547 le32_to_cpu(sbi->raw_super->segment_count_main); 548 int i; 549 550 seq_puts(seq, "format: segment_type|valid_blocks\n" 551 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); 552 553 for (i = 0; i < total_segs; i++) { 554 struct seg_entry *se = get_seg_entry(sbi, i); 555 556 if ((i % 10) == 0) 557 seq_printf(seq, "%-10d", i); 558 seq_printf(seq, "%d|%-3u", se->type, 559 get_valid_blocks(sbi, i, false)); 560 if ((i % 10) == 9 || i == (total_segs - 1)) 561 seq_putc(seq, '\n'); 562 else 563 seq_putc(seq, ' '); 564 } 565 566 return 0; 567 } 568 569 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq, 570 void *offset) 571 { 572 struct super_block *sb = seq->private; 573 struct f2fs_sb_info *sbi = F2FS_SB(sb); 574 unsigned int total_segs = 575 le32_to_cpu(sbi->raw_super->segment_count_main); 576 int i, j; 577 578 seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n" 579 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); 580 581 for (i = 0; i < total_segs; i++) { 582 struct seg_entry *se = get_seg_entry(sbi, i); 583 584 seq_printf(seq, "%-10d", i); 585 seq_printf(seq, "%d|%-3u|", se->type, 586 get_valid_blocks(sbi, i, false)); 587 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++) 588 seq_printf(seq, " %.2x", se->cur_valid_map[j]); 589 seq_putc(seq, '\n'); 590 } 591 return 0; 592 } 593 594 static int __maybe_unused iostat_info_seq_show(struct seq_file *seq, 595 void *offset) 596 { 597 struct super_block *sb = seq->private; 598 struct f2fs_sb_info *sbi = F2FS_SB(sb); 599 time64_t now = ktime_get_real_seconds(); 600 601 if (!sbi->iostat_enable) 602 return 0; 603 604 seq_printf(seq, "time: %-16llu\n", now); 605 606 /* print app IOs */ 607 seq_printf(seq, "app buffered: %-16llu\n", 608 sbi->write_iostat[APP_BUFFERED_IO]); 609 seq_printf(seq, "app direct: %-16llu\n", 610 sbi->write_iostat[APP_DIRECT_IO]); 611 seq_printf(seq, "app mapped: %-16llu\n", 612 sbi->write_iostat[APP_MAPPED_IO]); 613 614 /* print fs IOs */ 615 seq_printf(seq, "fs data: %-16llu\n", 616 sbi->write_iostat[FS_DATA_IO]); 617 seq_printf(seq, "fs node: %-16llu\n", 618 sbi->write_iostat[FS_NODE_IO]); 619 seq_printf(seq, "fs meta: %-16llu\n", 620 sbi->write_iostat[FS_META_IO]); 621 seq_printf(seq, "fs gc data: %-16llu\n", 622 sbi->write_iostat[FS_GC_DATA_IO]); 623 seq_printf(seq, "fs gc node: %-16llu\n", 624 sbi->write_iostat[FS_GC_NODE_IO]); 625 seq_printf(seq, "fs cp data: %-16llu\n", 626 sbi->write_iostat[FS_CP_DATA_IO]); 627 seq_printf(seq, "fs cp node: %-16llu\n", 628 sbi->write_iostat[FS_CP_NODE_IO]); 629 seq_printf(seq, "fs cp meta: %-16llu\n", 630 sbi->write_iostat[FS_CP_META_IO]); 631 seq_printf(seq, "fs discard: %-16llu\n", 632 sbi->write_iostat[FS_DISCARD]); 633 634 return 0; 635 } 636 637 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq, 638 void *offset) 639 { 640 struct super_block *sb = seq->private; 641 struct f2fs_sb_info *sbi = F2FS_SB(sb); 642 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); 643 int i; 644 645 seq_puts(seq, "format: victim_secmap bitmaps\n"); 646 647 for (i = 0; i < MAIN_SECS(sbi); i++) { 648 if ((i % 10) == 0) 649 seq_printf(seq, "%-10d", i); 650 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0); 651 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1)) 652 seq_putc(seq, '\n'); 653 else 654 seq_putc(seq, ' '); 655 } 656 return 0; 657 } 658 659 int __init f2fs_init_sysfs(void) 660 { 661 int ret; 662 663 kobject_set_name(&f2fs_kset.kobj, "f2fs"); 664 f2fs_kset.kobj.parent = fs_kobj; 665 ret = kset_register(&f2fs_kset); 666 if (ret) 667 return ret; 668 669 ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype, 670 NULL, "features"); 671 if (ret) 672 kset_unregister(&f2fs_kset); 673 else 674 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); 675 return ret; 676 } 677 678 void f2fs_exit_sysfs(void) 679 { 680 kobject_put(&f2fs_feat); 681 kset_unregister(&f2fs_kset); 682 remove_proc_entry("fs/f2fs", NULL); 683 f2fs_proc_root = NULL; 684 } 685 686 int f2fs_register_sysfs(struct f2fs_sb_info *sbi) 687 { 688 struct super_block *sb = sbi->sb; 689 int err; 690 691 sbi->s_kobj.kset = &f2fs_kset; 692 init_completion(&sbi->s_kobj_unregister); 693 err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL, 694 "%s", sb->s_id); 695 if (err) 696 return err; 697 698 if (f2fs_proc_root) 699 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); 700 701 if (sbi->s_proc) { 702 proc_create_single_data("segment_info", S_IRUGO, sbi->s_proc, 703 segment_info_seq_show, sb); 704 proc_create_single_data("segment_bits", S_IRUGO, sbi->s_proc, 705 segment_bits_seq_show, sb); 706 proc_create_single_data("iostat_info", S_IRUGO, sbi->s_proc, 707 iostat_info_seq_show, sb); 708 proc_create_single_data("victim_bits", S_IRUGO, sbi->s_proc, 709 victim_bits_seq_show, sb); 710 } 711 return 0; 712 } 713 714 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi) 715 { 716 if (sbi->s_proc) { 717 remove_proc_entry("iostat_info", sbi->s_proc); 718 remove_proc_entry("segment_info", sbi->s_proc); 719 remove_proc_entry("segment_bits", sbi->s_proc); 720 remove_proc_entry("victim_bits", sbi->s_proc); 721 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root); 722 } 723 kobject_del(&sbi->s_kobj); 724 } 725