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 *)&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_crypto(sb)) 96 len += snprintf(buf, PAGE_SIZE - len, "%s", 97 "encryption"); 98 if (f2fs_sb_mounted_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 len += snprintf(buf + len, PAGE_SIZE - len, "\n"); 117 return len; 118 } 119 120 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a, 121 struct f2fs_sb_info *sbi, char *buf) 122 { 123 return snprintf(buf, PAGE_SIZE, "%u\n", sbi->current_reserved_blocks); 124 } 125 126 static ssize_t f2fs_sbi_show(struct f2fs_attr *a, 127 struct f2fs_sb_info *sbi, char *buf) 128 { 129 unsigned char *ptr = NULL; 130 unsigned int *ui; 131 132 ptr = __struct_ptr(sbi, a->struct_type); 133 if (!ptr) 134 return -EINVAL; 135 136 ui = (unsigned int *)(ptr + a->offset); 137 138 return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 139 } 140 141 static ssize_t f2fs_sbi_store(struct f2fs_attr *a, 142 struct f2fs_sb_info *sbi, 143 const char *buf, size_t count) 144 { 145 unsigned char *ptr; 146 unsigned long t; 147 unsigned int *ui; 148 ssize_t ret; 149 150 ptr = __struct_ptr(sbi, a->struct_type); 151 if (!ptr) 152 return -EINVAL; 153 154 ui = (unsigned int *)(ptr + a->offset); 155 156 ret = kstrtoul(skip_spaces(buf), 0, &t); 157 if (ret < 0) 158 return ret; 159 #ifdef CONFIG_F2FS_FAULT_INJECTION 160 if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX)) 161 return -EINVAL; 162 #endif 163 if (a->struct_type == RESERVED_BLOCKS) { 164 spin_lock(&sbi->stat_lock); 165 if (t > (unsigned long)sbi->user_block_count) { 166 spin_unlock(&sbi->stat_lock); 167 return -EINVAL; 168 } 169 *ui = t; 170 sbi->current_reserved_blocks = min(sbi->reserved_blocks, 171 sbi->user_block_count - valid_user_blocks(sbi)); 172 spin_unlock(&sbi->stat_lock); 173 return count; 174 } 175 176 if (!strcmp(a->attr.name, "discard_granularity")) { 177 if (t == 0 || t > MAX_PLIST_NUM) 178 return -EINVAL; 179 if (t == *ui) 180 return count; 181 *ui = t; 182 return count; 183 } 184 185 *ui = t; 186 187 if (!strcmp(a->attr.name, "iostat_enable") && *ui == 0) 188 f2fs_reset_iostat(sbi); 189 if (!strcmp(a->attr.name, "gc_urgent") && t == 1 && sbi->gc_thread) { 190 sbi->gc_thread->gc_wake = 1; 191 wake_up_interruptible_all(&sbi->gc_thread->gc_wait_queue_head); 192 wake_up_discard_thread(sbi, true); 193 } 194 195 return count; 196 } 197 198 static ssize_t f2fs_attr_show(struct kobject *kobj, 199 struct attribute *attr, char *buf) 200 { 201 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, 202 s_kobj); 203 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); 204 205 return a->show ? a->show(a, sbi, buf) : 0; 206 } 207 208 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr, 209 const char *buf, size_t len) 210 { 211 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, 212 s_kobj); 213 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); 214 215 return a->store ? a->store(a, sbi, buf, len) : 0; 216 } 217 218 static void f2fs_sb_release(struct kobject *kobj) 219 { 220 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, 221 s_kobj); 222 complete(&sbi->s_kobj_unregister); 223 } 224 225 enum feat_id { 226 FEAT_CRYPTO = 0, 227 FEAT_BLKZONED, 228 FEAT_ATOMIC_WRITE, 229 FEAT_EXTRA_ATTR, 230 FEAT_PROJECT_QUOTA, 231 FEAT_INODE_CHECKSUM, 232 FEAT_FLEXIBLE_INLINE_XATTR, 233 FEAT_QUOTA_INO, 234 }; 235 236 static ssize_t f2fs_feature_show(struct f2fs_attr *a, 237 struct f2fs_sb_info *sbi, char *buf) 238 { 239 switch (a->id) { 240 case FEAT_CRYPTO: 241 case FEAT_BLKZONED: 242 case FEAT_ATOMIC_WRITE: 243 case FEAT_EXTRA_ATTR: 244 case FEAT_PROJECT_QUOTA: 245 case FEAT_INODE_CHECKSUM: 246 case FEAT_FLEXIBLE_INLINE_XATTR: 247 case FEAT_QUOTA_INO: 248 return snprintf(buf, PAGE_SIZE, "supported\n"); 249 } 250 return 0; 251 } 252 253 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \ 254 static struct f2fs_attr f2fs_attr_##_name = { \ 255 .attr = {.name = __stringify(_name), .mode = _mode }, \ 256 .show = _show, \ 257 .store = _store, \ 258 .struct_type = _struct_type, \ 259 .offset = _offset \ 260 } 261 262 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \ 263 F2FS_ATTR_OFFSET(struct_type, name, 0644, \ 264 f2fs_sbi_show, f2fs_sbi_store, \ 265 offsetof(struct struct_name, elname)) 266 267 #define F2FS_GENERAL_RO_ATTR(name) \ 268 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL) 269 270 #define F2FS_FEATURE_RO_ATTR(_name, _id) \ 271 static struct f2fs_attr f2fs_attr_##_name = { \ 272 .attr = {.name = __stringify(_name), .mode = 0444 }, \ 273 .show = f2fs_feature_show, \ 274 .id = _id, \ 275 } 276 277 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time, 278 urgent_sleep_time); 279 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time); 280 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time); 281 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time); 282 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle); 283 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent, gc_urgent); 284 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); 285 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards); 286 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity); 287 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks); 288 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections); 289 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy); 290 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util); 291 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks); 292 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks); 293 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections); 294 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh); 295 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages); 296 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio); 297 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search); 298 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level); 299 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]); 300 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]); 301 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable); 302 #ifdef CONFIG_F2FS_FAULT_INJECTION 303 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate); 304 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type); 305 #endif 306 F2FS_GENERAL_RO_ATTR(dirty_segments); 307 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes); 308 F2FS_GENERAL_RO_ATTR(features); 309 F2FS_GENERAL_RO_ATTR(current_reserved_blocks); 310 311 #ifdef CONFIG_F2FS_FS_ENCRYPTION 312 F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO); 313 #endif 314 #ifdef CONFIG_BLK_DEV_ZONED 315 F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED); 316 #endif 317 F2FS_FEATURE_RO_ATTR(atomic_write, FEAT_ATOMIC_WRITE); 318 F2FS_FEATURE_RO_ATTR(extra_attr, FEAT_EXTRA_ATTR); 319 F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA); 320 F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM); 321 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr, FEAT_FLEXIBLE_INLINE_XATTR); 322 F2FS_FEATURE_RO_ATTR(quota_ino, FEAT_QUOTA_INO); 323 324 #define ATTR_LIST(name) (&f2fs_attr_##name.attr) 325 static struct attribute *f2fs_attrs[] = { 326 ATTR_LIST(gc_urgent_sleep_time), 327 ATTR_LIST(gc_min_sleep_time), 328 ATTR_LIST(gc_max_sleep_time), 329 ATTR_LIST(gc_no_gc_sleep_time), 330 ATTR_LIST(gc_idle), 331 ATTR_LIST(gc_urgent), 332 ATTR_LIST(reclaim_segments), 333 ATTR_LIST(max_small_discards), 334 ATTR_LIST(discard_granularity), 335 ATTR_LIST(batched_trim_sections), 336 ATTR_LIST(ipu_policy), 337 ATTR_LIST(min_ipu_util), 338 ATTR_LIST(min_fsync_blocks), 339 ATTR_LIST(min_hot_blocks), 340 ATTR_LIST(min_ssr_sections), 341 ATTR_LIST(max_victim_search), 342 ATTR_LIST(dir_level), 343 ATTR_LIST(ram_thresh), 344 ATTR_LIST(ra_nid_pages), 345 ATTR_LIST(dirty_nats_ratio), 346 ATTR_LIST(cp_interval), 347 ATTR_LIST(idle_interval), 348 ATTR_LIST(iostat_enable), 349 #ifdef CONFIG_F2FS_FAULT_INJECTION 350 ATTR_LIST(inject_rate), 351 ATTR_LIST(inject_type), 352 #endif 353 ATTR_LIST(dirty_segments), 354 ATTR_LIST(lifetime_write_kbytes), 355 ATTR_LIST(features), 356 ATTR_LIST(reserved_blocks), 357 ATTR_LIST(current_reserved_blocks), 358 NULL, 359 }; 360 361 static struct attribute *f2fs_feat_attrs[] = { 362 #ifdef CONFIG_F2FS_FS_ENCRYPTION 363 ATTR_LIST(encryption), 364 #endif 365 #ifdef CONFIG_BLK_DEV_ZONED 366 ATTR_LIST(block_zoned), 367 #endif 368 ATTR_LIST(atomic_write), 369 ATTR_LIST(extra_attr), 370 ATTR_LIST(project_quota), 371 ATTR_LIST(inode_checksum), 372 ATTR_LIST(flexible_inline_xattr), 373 ATTR_LIST(quota_ino), 374 NULL, 375 }; 376 377 static const struct sysfs_ops f2fs_attr_ops = { 378 .show = f2fs_attr_show, 379 .store = f2fs_attr_store, 380 }; 381 382 static struct kobj_type f2fs_sb_ktype = { 383 .default_attrs = f2fs_attrs, 384 .sysfs_ops = &f2fs_attr_ops, 385 .release = f2fs_sb_release, 386 }; 387 388 static struct kobj_type f2fs_ktype = { 389 .sysfs_ops = &f2fs_attr_ops, 390 }; 391 392 static struct kset f2fs_kset = { 393 .kobj = {.ktype = &f2fs_ktype}, 394 }; 395 396 static struct kobj_type f2fs_feat_ktype = { 397 .default_attrs = f2fs_feat_attrs, 398 .sysfs_ops = &f2fs_attr_ops, 399 }; 400 401 static struct kobject f2fs_feat = { 402 .kset = &f2fs_kset, 403 }; 404 405 static int segment_info_seq_show(struct seq_file *seq, void *offset) 406 { 407 struct super_block *sb = seq->private; 408 struct f2fs_sb_info *sbi = F2FS_SB(sb); 409 unsigned int total_segs = 410 le32_to_cpu(sbi->raw_super->segment_count_main); 411 int i; 412 413 seq_puts(seq, "format: segment_type|valid_blocks\n" 414 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); 415 416 for (i = 0; i < total_segs; i++) { 417 struct seg_entry *se = get_seg_entry(sbi, i); 418 419 if ((i % 10) == 0) 420 seq_printf(seq, "%-10d", i); 421 seq_printf(seq, "%d|%-3u", se->type, 422 get_valid_blocks(sbi, i, false)); 423 if ((i % 10) == 9 || i == (total_segs - 1)) 424 seq_putc(seq, '\n'); 425 else 426 seq_putc(seq, ' '); 427 } 428 429 return 0; 430 } 431 432 static int segment_bits_seq_show(struct seq_file *seq, void *offset) 433 { 434 struct super_block *sb = seq->private; 435 struct f2fs_sb_info *sbi = F2FS_SB(sb); 436 unsigned int total_segs = 437 le32_to_cpu(sbi->raw_super->segment_count_main); 438 int i, j; 439 440 seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n" 441 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); 442 443 for (i = 0; i < total_segs; i++) { 444 struct seg_entry *se = get_seg_entry(sbi, i); 445 446 seq_printf(seq, "%-10d", i); 447 seq_printf(seq, "%d|%-3u|", se->type, 448 get_valid_blocks(sbi, i, false)); 449 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++) 450 seq_printf(seq, " %.2x", se->cur_valid_map[j]); 451 seq_putc(seq, '\n'); 452 } 453 return 0; 454 } 455 456 static int iostat_info_seq_show(struct seq_file *seq, void *offset) 457 { 458 struct super_block *sb = seq->private; 459 struct f2fs_sb_info *sbi = F2FS_SB(sb); 460 time64_t now = ktime_get_real_seconds(); 461 462 if (!sbi->iostat_enable) 463 return 0; 464 465 seq_printf(seq, "time: %-16llu\n", now); 466 467 /* print app IOs */ 468 seq_printf(seq, "app buffered: %-16llu\n", 469 sbi->write_iostat[APP_BUFFERED_IO]); 470 seq_printf(seq, "app direct: %-16llu\n", 471 sbi->write_iostat[APP_DIRECT_IO]); 472 seq_printf(seq, "app mapped: %-16llu\n", 473 sbi->write_iostat[APP_MAPPED_IO]); 474 475 /* print fs IOs */ 476 seq_printf(seq, "fs data: %-16llu\n", 477 sbi->write_iostat[FS_DATA_IO]); 478 seq_printf(seq, "fs node: %-16llu\n", 479 sbi->write_iostat[FS_NODE_IO]); 480 seq_printf(seq, "fs meta: %-16llu\n", 481 sbi->write_iostat[FS_META_IO]); 482 seq_printf(seq, "fs gc data: %-16llu\n", 483 sbi->write_iostat[FS_GC_DATA_IO]); 484 seq_printf(seq, "fs gc node: %-16llu\n", 485 sbi->write_iostat[FS_GC_NODE_IO]); 486 seq_printf(seq, "fs cp data: %-16llu\n", 487 sbi->write_iostat[FS_CP_DATA_IO]); 488 seq_printf(seq, "fs cp node: %-16llu\n", 489 sbi->write_iostat[FS_CP_NODE_IO]); 490 seq_printf(seq, "fs cp meta: %-16llu\n", 491 sbi->write_iostat[FS_CP_META_IO]); 492 seq_printf(seq, "fs discard: %-16llu\n", 493 sbi->write_iostat[FS_DISCARD]); 494 495 return 0; 496 } 497 498 #define F2FS_PROC_FILE_DEF(_name) \ 499 static int _name##_open_fs(struct inode *inode, struct file *file) \ 500 { \ 501 return single_open(file, _name##_seq_show, PDE_DATA(inode)); \ 502 } \ 503 \ 504 static const struct file_operations f2fs_seq_##_name##_fops = { \ 505 .open = _name##_open_fs, \ 506 .read = seq_read, \ 507 .llseek = seq_lseek, \ 508 .release = single_release, \ 509 }; 510 511 F2FS_PROC_FILE_DEF(segment_info); 512 F2FS_PROC_FILE_DEF(segment_bits); 513 F2FS_PROC_FILE_DEF(iostat_info); 514 515 int __init f2fs_init_sysfs(void) 516 { 517 int ret; 518 519 kobject_set_name(&f2fs_kset.kobj, "f2fs"); 520 f2fs_kset.kobj.parent = fs_kobj; 521 ret = kset_register(&f2fs_kset); 522 if (ret) 523 return ret; 524 525 ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype, 526 NULL, "features"); 527 if (ret) 528 kset_unregister(&f2fs_kset); 529 else 530 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); 531 return ret; 532 } 533 534 void f2fs_exit_sysfs(void) 535 { 536 kobject_put(&f2fs_feat); 537 kset_unregister(&f2fs_kset); 538 remove_proc_entry("fs/f2fs", NULL); 539 f2fs_proc_root = NULL; 540 } 541 542 int f2fs_register_sysfs(struct f2fs_sb_info *sbi) 543 { 544 struct super_block *sb = sbi->sb; 545 int err; 546 547 sbi->s_kobj.kset = &f2fs_kset; 548 init_completion(&sbi->s_kobj_unregister); 549 err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL, 550 "%s", sb->s_id); 551 if (err) 552 return err; 553 554 if (f2fs_proc_root) 555 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); 556 557 if (sbi->s_proc) { 558 proc_create_data("segment_info", S_IRUGO, sbi->s_proc, 559 &f2fs_seq_segment_info_fops, sb); 560 proc_create_data("segment_bits", S_IRUGO, sbi->s_proc, 561 &f2fs_seq_segment_bits_fops, sb); 562 proc_create_data("iostat_info", S_IRUGO, sbi->s_proc, 563 &f2fs_seq_iostat_info_fops, sb); 564 } 565 return 0; 566 } 567 568 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi) 569 { 570 if (sbi->s_proc) { 571 remove_proc_entry("iostat_info", sbi->s_proc); 572 remove_proc_entry("segment_info", sbi->s_proc); 573 remove_proc_entry("segment_bits", sbi->s_proc); 574 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root); 575 } 576 kobject_del(&sbi->s_kobj); 577 } 578