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/proc_fs.h> 13 #include <linux/f2fs_fs.h> 14 #include <linux/seq_file.h> 15 16 #include "f2fs.h" 17 #include "segment.h" 18 #include "gc.h" 19 20 static struct proc_dir_entry *f2fs_proc_root; 21 22 /* Sysfs support for f2fs */ 23 enum { 24 GC_THREAD, /* struct f2fs_gc_thread */ 25 SM_INFO, /* struct f2fs_sm_info */ 26 DCC_INFO, /* struct discard_cmd_control */ 27 NM_INFO, /* struct f2fs_nm_info */ 28 F2FS_SBI, /* struct f2fs_sb_info */ 29 #ifdef CONFIG_F2FS_FAULT_INJECTION 30 FAULT_INFO_RATE, /* struct f2fs_fault_info */ 31 FAULT_INFO_TYPE, /* struct f2fs_fault_info */ 32 #endif 33 RESERVED_BLOCKS, /* struct f2fs_sb_info */ 34 }; 35 36 struct f2fs_attr { 37 struct attribute attr; 38 ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *); 39 ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *, 40 const char *, size_t); 41 int struct_type; 42 int offset; 43 int id; 44 }; 45 46 static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type) 47 { 48 if (struct_type == GC_THREAD) 49 return (unsigned char *)sbi->gc_thread; 50 else if (struct_type == SM_INFO) 51 return (unsigned char *)SM_I(sbi); 52 else if (struct_type == DCC_INFO) 53 return (unsigned char *)SM_I(sbi)->dcc_info; 54 else if (struct_type == NM_INFO) 55 return (unsigned char *)NM_I(sbi); 56 else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS) 57 return (unsigned char *)sbi; 58 #ifdef CONFIG_F2FS_FAULT_INJECTION 59 else if (struct_type == FAULT_INFO_RATE || 60 struct_type == FAULT_INFO_TYPE) 61 return (unsigned char *)&F2FS_OPTION(sbi).fault_info; 62 #endif 63 return NULL; 64 } 65 66 static ssize_t dirty_segments_show(struct f2fs_attr *a, 67 struct f2fs_sb_info *sbi, char *buf) 68 { 69 return snprintf(buf, PAGE_SIZE, "%llu\n", 70 (unsigned long long)(dirty_segments(sbi))); 71 } 72 73 static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a, 74 struct f2fs_sb_info *sbi, char *buf) 75 { 76 struct super_block *sb = sbi->sb; 77 78 if (!sb->s_bdev->bd_part) 79 return snprintf(buf, PAGE_SIZE, "0\n"); 80 81 return snprintf(buf, PAGE_SIZE, "%llu\n", 82 (unsigned long long)(sbi->kbytes_written + 83 BD_PART_WRITTEN(sbi))); 84 } 85 86 static ssize_t features_show(struct f2fs_attr *a, 87 struct f2fs_sb_info *sbi, char *buf) 88 { 89 struct super_block *sb = sbi->sb; 90 int len = 0; 91 92 if (!sb->s_bdev->bd_part) 93 return snprintf(buf, PAGE_SIZE, "0\n"); 94 95 if (f2fs_sb_has_encrypt(sb)) 96 len += snprintf(buf, PAGE_SIZE - len, "%s", 97 "encryption"); 98 if (f2fs_sb_has_blkzoned(sb)) 99 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 100 len ? ", " : "", "blkzoned"); 101 if (f2fs_sb_has_extra_attr(sb)) 102 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 103 len ? ", " : "", "extra_attr"); 104 if (f2fs_sb_has_project_quota(sb)) 105 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 106 len ? ", " : "", "projquota"); 107 if (f2fs_sb_has_inode_chksum(sb)) 108 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 109 len ? ", " : "", "inode_checksum"); 110 if (f2fs_sb_has_flexible_inline_xattr(sb)) 111 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 112 len ? ", " : "", "flexible_inline_xattr"); 113 if (f2fs_sb_has_quota_ino(sb)) 114 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 115 len ? ", " : "", "quota_ino"); 116 if (f2fs_sb_has_inode_crtime(sb)) 117 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 118 len ? ", " : "", "inode_crtime"); 119 if (f2fs_sb_has_lost_found(sb)) 120 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s", 121 len ? ", " : "", "lost_found"); 122 len += snprintf(buf + len, PAGE_SIZE - len, "\n"); 123 return len; 124 } 125 126 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a, 127 struct f2fs_sb_info *sbi, char *buf) 128 { 129 return snprintf(buf, PAGE_SIZE, "%u\n", sbi->current_reserved_blocks); 130 } 131 132 static ssize_t f2fs_sbi_show(struct f2fs_attr *a, 133 struct f2fs_sb_info *sbi, char *buf) 134 { 135 unsigned char *ptr = NULL; 136 unsigned int *ui; 137 138 ptr = __struct_ptr(sbi, a->struct_type); 139 if (!ptr) 140 return -EINVAL; 141 142 if (!strcmp(a->attr.name, "extension_list")) { 143 __u8 (*extlist)[F2FS_EXTENSION_LEN] = 144 sbi->raw_super->extension_list; 145 int cold_count = le32_to_cpu(sbi->raw_super->extension_count); 146 int hot_count = sbi->raw_super->hot_ext_count; 147 int len = 0, i; 148 149 len += snprintf(buf + len, PAGE_SIZE - len, 150 "cold file extenstion:\n"); 151 for (i = 0; i < cold_count; i++) 152 len += snprintf(buf + len, PAGE_SIZE - len, "%s\n", 153 extlist[i]); 154 155 len += snprintf(buf + len, PAGE_SIZE - len, 156 "hot file extenstion:\n"); 157 for (i = cold_count; i < cold_count + hot_count; i++) 158 len += snprintf(buf + len, PAGE_SIZE - len, "%s\n", 159 extlist[i]); 160 return len; 161 } 162 163 ui = (unsigned int *)(ptr + a->offset); 164 165 return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 166 } 167 168 static ssize_t f2fs_sbi_store(struct f2fs_attr *a, 169 struct f2fs_sb_info *sbi, 170 const char *buf, size_t count) 171 { 172 unsigned char *ptr; 173 unsigned long t; 174 unsigned int *ui; 175 ssize_t ret; 176 177 ptr = __struct_ptr(sbi, a->struct_type); 178 if (!ptr) 179 return -EINVAL; 180 181 if (!strcmp(a->attr.name, "extension_list")) { 182 const char *name = strim((char *)buf); 183 bool set = true, hot; 184 185 if (!strncmp(name, "[h]", 3)) 186 hot = true; 187 else if (!strncmp(name, "[c]", 3)) 188 hot = false; 189 else 190 return -EINVAL; 191 192 name += 3; 193 194 if (*name == '!') { 195 name++; 196 set = false; 197 } 198 199 if (strlen(name) >= F2FS_EXTENSION_LEN) 200 return -EINVAL; 201 202 down_write(&sbi->sb_lock); 203 204 ret = update_extension_list(sbi, name, hot, set); 205 if (ret) 206 goto out; 207 208 ret = f2fs_commit_super(sbi, false); 209 if (ret) 210 update_extension_list(sbi, name, hot, !set); 211 out: 212 up_write(&sbi->sb_lock); 213 return ret ? ret : count; 214 } 215 216 ui = (unsigned int *)(ptr + a->offset); 217 218 ret = kstrtoul(skip_spaces(buf), 0, &t); 219 if (ret < 0) 220 return ret; 221 #ifdef CONFIG_F2FS_FAULT_INJECTION 222 if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX)) 223 return -EINVAL; 224 #endif 225 if (a->struct_type == RESERVED_BLOCKS) { 226 spin_lock(&sbi->stat_lock); 227 if (t > (unsigned long)(sbi->user_block_count - 228 F2FS_OPTION(sbi).root_reserved_blocks)) { 229 spin_unlock(&sbi->stat_lock); 230 return -EINVAL; 231 } 232 *ui = t; 233 sbi->current_reserved_blocks = min(sbi->reserved_blocks, 234 sbi->user_block_count - valid_user_blocks(sbi)); 235 spin_unlock(&sbi->stat_lock); 236 return count; 237 } 238 239 if (!strcmp(a->attr.name, "discard_granularity")) { 240 if (t == 0 || t > MAX_PLIST_NUM) 241 return -EINVAL; 242 if (t == *ui) 243 return count; 244 *ui = t; 245 return count; 246 } 247 248 *ui = t; 249 250 if (!strcmp(a->attr.name, "iostat_enable") && *ui == 0) 251 f2fs_reset_iostat(sbi); 252 if (!strcmp(a->attr.name, "gc_urgent") && t == 1 && sbi->gc_thread) { 253 sbi->gc_thread->gc_wake = 1; 254 wake_up_interruptible_all(&sbi->gc_thread->gc_wait_queue_head); 255 wake_up_discard_thread(sbi, true); 256 } 257 258 return count; 259 } 260 261 static ssize_t f2fs_attr_show(struct kobject *kobj, 262 struct attribute *attr, char *buf) 263 { 264 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, 265 s_kobj); 266 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); 267 268 return a->show ? a->show(a, sbi, buf) : 0; 269 } 270 271 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr, 272 const char *buf, size_t len) 273 { 274 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, 275 s_kobj); 276 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); 277 278 return a->store ? a->store(a, sbi, buf, len) : 0; 279 } 280 281 static void f2fs_sb_release(struct kobject *kobj) 282 { 283 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, 284 s_kobj); 285 complete(&sbi->s_kobj_unregister); 286 } 287 288 enum feat_id { 289 FEAT_CRYPTO = 0, 290 FEAT_BLKZONED, 291 FEAT_ATOMIC_WRITE, 292 FEAT_EXTRA_ATTR, 293 FEAT_PROJECT_QUOTA, 294 FEAT_INODE_CHECKSUM, 295 FEAT_FLEXIBLE_INLINE_XATTR, 296 FEAT_QUOTA_INO, 297 FEAT_INODE_CRTIME, 298 FEAT_LOST_FOUND, 299 }; 300 301 static ssize_t f2fs_feature_show(struct f2fs_attr *a, 302 struct f2fs_sb_info *sbi, char *buf) 303 { 304 switch (a->id) { 305 case FEAT_CRYPTO: 306 case FEAT_BLKZONED: 307 case FEAT_ATOMIC_WRITE: 308 case FEAT_EXTRA_ATTR: 309 case FEAT_PROJECT_QUOTA: 310 case FEAT_INODE_CHECKSUM: 311 case FEAT_FLEXIBLE_INLINE_XATTR: 312 case FEAT_QUOTA_INO: 313 case FEAT_INODE_CRTIME: 314 case FEAT_LOST_FOUND: 315 return snprintf(buf, PAGE_SIZE, "supported\n"); 316 } 317 return 0; 318 } 319 320 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \ 321 static struct f2fs_attr f2fs_attr_##_name = { \ 322 .attr = {.name = __stringify(_name), .mode = _mode }, \ 323 .show = _show, \ 324 .store = _store, \ 325 .struct_type = _struct_type, \ 326 .offset = _offset \ 327 } 328 329 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \ 330 F2FS_ATTR_OFFSET(struct_type, name, 0644, \ 331 f2fs_sbi_show, f2fs_sbi_store, \ 332 offsetof(struct struct_name, elname)) 333 334 #define F2FS_GENERAL_RO_ATTR(name) \ 335 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL) 336 337 #define F2FS_FEATURE_RO_ATTR(_name, _id) \ 338 static struct f2fs_attr f2fs_attr_##_name = { \ 339 .attr = {.name = __stringify(_name), .mode = 0444 }, \ 340 .show = f2fs_feature_show, \ 341 .id = _id, \ 342 } 343 344 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time, 345 urgent_sleep_time); 346 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time); 347 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time); 348 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time); 349 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle); 350 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent, gc_urgent); 351 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); 352 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards); 353 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity); 354 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks); 355 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections); 356 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy); 357 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util); 358 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks); 359 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks); 360 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections); 361 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh); 362 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages); 363 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio); 364 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search); 365 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level); 366 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]); 367 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]); 368 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable); 369 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra); 370 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold); 371 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list); 372 #ifdef CONFIG_F2FS_FAULT_INJECTION 373 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate); 374 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type); 375 #endif 376 F2FS_GENERAL_RO_ATTR(dirty_segments); 377 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes); 378 F2FS_GENERAL_RO_ATTR(features); 379 F2FS_GENERAL_RO_ATTR(current_reserved_blocks); 380 381 #ifdef CONFIG_F2FS_FS_ENCRYPTION 382 F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO); 383 #endif 384 #ifdef CONFIG_BLK_DEV_ZONED 385 F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED); 386 #endif 387 F2FS_FEATURE_RO_ATTR(atomic_write, FEAT_ATOMIC_WRITE); 388 F2FS_FEATURE_RO_ATTR(extra_attr, FEAT_EXTRA_ATTR); 389 F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA); 390 F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM); 391 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr, FEAT_FLEXIBLE_INLINE_XATTR); 392 F2FS_FEATURE_RO_ATTR(quota_ino, FEAT_QUOTA_INO); 393 F2FS_FEATURE_RO_ATTR(inode_crtime, FEAT_INODE_CRTIME); 394 F2FS_FEATURE_RO_ATTR(lost_found, FEAT_LOST_FOUND); 395 396 #define ATTR_LIST(name) (&f2fs_attr_##name.attr) 397 static struct attribute *f2fs_attrs[] = { 398 ATTR_LIST(gc_urgent_sleep_time), 399 ATTR_LIST(gc_min_sleep_time), 400 ATTR_LIST(gc_max_sleep_time), 401 ATTR_LIST(gc_no_gc_sleep_time), 402 ATTR_LIST(gc_idle), 403 ATTR_LIST(gc_urgent), 404 ATTR_LIST(reclaim_segments), 405 ATTR_LIST(max_small_discards), 406 ATTR_LIST(discard_granularity), 407 ATTR_LIST(batched_trim_sections), 408 ATTR_LIST(ipu_policy), 409 ATTR_LIST(min_ipu_util), 410 ATTR_LIST(min_fsync_blocks), 411 ATTR_LIST(min_hot_blocks), 412 ATTR_LIST(min_ssr_sections), 413 ATTR_LIST(max_victim_search), 414 ATTR_LIST(dir_level), 415 ATTR_LIST(ram_thresh), 416 ATTR_LIST(ra_nid_pages), 417 ATTR_LIST(dirty_nats_ratio), 418 ATTR_LIST(cp_interval), 419 ATTR_LIST(idle_interval), 420 ATTR_LIST(iostat_enable), 421 ATTR_LIST(readdir_ra), 422 ATTR_LIST(gc_pin_file_thresh), 423 ATTR_LIST(extension_list), 424 #ifdef CONFIG_F2FS_FAULT_INJECTION 425 ATTR_LIST(inject_rate), 426 ATTR_LIST(inject_type), 427 #endif 428 ATTR_LIST(dirty_segments), 429 ATTR_LIST(lifetime_write_kbytes), 430 ATTR_LIST(features), 431 ATTR_LIST(reserved_blocks), 432 ATTR_LIST(current_reserved_blocks), 433 NULL, 434 }; 435 436 static struct attribute *f2fs_feat_attrs[] = { 437 #ifdef CONFIG_F2FS_FS_ENCRYPTION 438 ATTR_LIST(encryption), 439 #endif 440 #ifdef CONFIG_BLK_DEV_ZONED 441 ATTR_LIST(block_zoned), 442 #endif 443 ATTR_LIST(atomic_write), 444 ATTR_LIST(extra_attr), 445 ATTR_LIST(project_quota), 446 ATTR_LIST(inode_checksum), 447 ATTR_LIST(flexible_inline_xattr), 448 ATTR_LIST(quota_ino), 449 ATTR_LIST(inode_crtime), 450 ATTR_LIST(lost_found), 451 NULL, 452 }; 453 454 static const struct sysfs_ops f2fs_attr_ops = { 455 .show = f2fs_attr_show, 456 .store = f2fs_attr_store, 457 }; 458 459 static struct kobj_type f2fs_sb_ktype = { 460 .default_attrs = f2fs_attrs, 461 .sysfs_ops = &f2fs_attr_ops, 462 .release = f2fs_sb_release, 463 }; 464 465 static struct kobj_type f2fs_ktype = { 466 .sysfs_ops = &f2fs_attr_ops, 467 }; 468 469 static struct kset f2fs_kset = { 470 .kobj = {.ktype = &f2fs_ktype}, 471 }; 472 473 static struct kobj_type f2fs_feat_ktype = { 474 .default_attrs = f2fs_feat_attrs, 475 .sysfs_ops = &f2fs_attr_ops, 476 }; 477 478 static struct kobject f2fs_feat = { 479 .kset = &f2fs_kset, 480 }; 481 482 static int segment_info_seq_show(struct seq_file *seq, void *offset) 483 { 484 struct super_block *sb = seq->private; 485 struct f2fs_sb_info *sbi = F2FS_SB(sb); 486 unsigned int total_segs = 487 le32_to_cpu(sbi->raw_super->segment_count_main); 488 int i; 489 490 seq_puts(seq, "format: segment_type|valid_blocks\n" 491 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); 492 493 for (i = 0; i < total_segs; i++) { 494 struct seg_entry *se = get_seg_entry(sbi, i); 495 496 if ((i % 10) == 0) 497 seq_printf(seq, "%-10d", i); 498 seq_printf(seq, "%d|%-3u", se->type, 499 get_valid_blocks(sbi, i, false)); 500 if ((i % 10) == 9 || i == (total_segs - 1)) 501 seq_putc(seq, '\n'); 502 else 503 seq_putc(seq, ' '); 504 } 505 506 return 0; 507 } 508 509 static int segment_bits_seq_show(struct seq_file *seq, void *offset) 510 { 511 struct super_block *sb = seq->private; 512 struct f2fs_sb_info *sbi = F2FS_SB(sb); 513 unsigned int total_segs = 514 le32_to_cpu(sbi->raw_super->segment_count_main); 515 int i, j; 516 517 seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n" 518 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); 519 520 for (i = 0; i < total_segs; i++) { 521 struct seg_entry *se = get_seg_entry(sbi, i); 522 523 seq_printf(seq, "%-10d", i); 524 seq_printf(seq, "%d|%-3u|", se->type, 525 get_valid_blocks(sbi, i, false)); 526 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++) 527 seq_printf(seq, " %.2x", se->cur_valid_map[j]); 528 seq_putc(seq, '\n'); 529 } 530 return 0; 531 } 532 533 static int iostat_info_seq_show(struct seq_file *seq, void *offset) 534 { 535 struct super_block *sb = seq->private; 536 struct f2fs_sb_info *sbi = F2FS_SB(sb); 537 time64_t now = ktime_get_real_seconds(); 538 539 if (!sbi->iostat_enable) 540 return 0; 541 542 seq_printf(seq, "time: %-16llu\n", now); 543 544 /* print app IOs */ 545 seq_printf(seq, "app buffered: %-16llu\n", 546 sbi->write_iostat[APP_BUFFERED_IO]); 547 seq_printf(seq, "app direct: %-16llu\n", 548 sbi->write_iostat[APP_DIRECT_IO]); 549 seq_printf(seq, "app mapped: %-16llu\n", 550 sbi->write_iostat[APP_MAPPED_IO]); 551 552 /* print fs IOs */ 553 seq_printf(seq, "fs data: %-16llu\n", 554 sbi->write_iostat[FS_DATA_IO]); 555 seq_printf(seq, "fs node: %-16llu\n", 556 sbi->write_iostat[FS_NODE_IO]); 557 seq_printf(seq, "fs meta: %-16llu\n", 558 sbi->write_iostat[FS_META_IO]); 559 seq_printf(seq, "fs gc data: %-16llu\n", 560 sbi->write_iostat[FS_GC_DATA_IO]); 561 seq_printf(seq, "fs gc node: %-16llu\n", 562 sbi->write_iostat[FS_GC_NODE_IO]); 563 seq_printf(seq, "fs cp data: %-16llu\n", 564 sbi->write_iostat[FS_CP_DATA_IO]); 565 seq_printf(seq, "fs cp node: %-16llu\n", 566 sbi->write_iostat[FS_CP_NODE_IO]); 567 seq_printf(seq, "fs cp meta: %-16llu\n", 568 sbi->write_iostat[FS_CP_META_IO]); 569 seq_printf(seq, "fs discard: %-16llu\n", 570 sbi->write_iostat[FS_DISCARD]); 571 572 return 0; 573 } 574 575 #define F2FS_PROC_FILE_DEF(_name) \ 576 static int _name##_open_fs(struct inode *inode, struct file *file) \ 577 { \ 578 return single_open(file, _name##_seq_show, PDE_DATA(inode)); \ 579 } \ 580 \ 581 static const struct file_operations f2fs_seq_##_name##_fops = { \ 582 .open = _name##_open_fs, \ 583 .read = seq_read, \ 584 .llseek = seq_lseek, \ 585 .release = single_release, \ 586 }; 587 588 F2FS_PROC_FILE_DEF(segment_info); 589 F2FS_PROC_FILE_DEF(segment_bits); 590 F2FS_PROC_FILE_DEF(iostat_info); 591 592 int __init f2fs_init_sysfs(void) 593 { 594 int ret; 595 596 kobject_set_name(&f2fs_kset.kobj, "f2fs"); 597 f2fs_kset.kobj.parent = fs_kobj; 598 ret = kset_register(&f2fs_kset); 599 if (ret) 600 return ret; 601 602 ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype, 603 NULL, "features"); 604 if (ret) 605 kset_unregister(&f2fs_kset); 606 else 607 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); 608 return ret; 609 } 610 611 void f2fs_exit_sysfs(void) 612 { 613 kobject_put(&f2fs_feat); 614 kset_unregister(&f2fs_kset); 615 remove_proc_entry("fs/f2fs", NULL); 616 f2fs_proc_root = NULL; 617 } 618 619 int f2fs_register_sysfs(struct f2fs_sb_info *sbi) 620 { 621 struct super_block *sb = sbi->sb; 622 int err; 623 624 sbi->s_kobj.kset = &f2fs_kset; 625 init_completion(&sbi->s_kobj_unregister); 626 err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL, 627 "%s", sb->s_id); 628 if (err) 629 return err; 630 631 if (f2fs_proc_root) 632 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); 633 634 if (sbi->s_proc) { 635 proc_create_data("segment_info", S_IRUGO, sbi->s_proc, 636 &f2fs_seq_segment_info_fops, sb); 637 proc_create_data("segment_bits", S_IRUGO, sbi->s_proc, 638 &f2fs_seq_segment_bits_fops, sb); 639 proc_create_data("iostat_info", S_IRUGO, sbi->s_proc, 640 &f2fs_seq_iostat_info_fops, sb); 641 } 642 return 0; 643 } 644 645 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi) 646 { 647 if (sbi->s_proc) { 648 remove_proc_entry("iostat_info", sbi->s_proc); 649 remove_proc_entry("segment_info", sbi->s_proc); 650 remove_proc_entry("segment_bits", sbi->s_proc); 651 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root); 652 } 653 kobject_del(&sbi->s_kobj); 654 } 655