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 sbi->root_reserved_blocks)) { 167 spin_unlock(&sbi->stat_lock); 168 return -EINVAL; 169 } 170 *ui = t; 171 sbi->current_reserved_blocks = min(sbi->reserved_blocks, 172 sbi->user_block_count - valid_user_blocks(sbi)); 173 spin_unlock(&sbi->stat_lock); 174 return count; 175 } 176 177 if (!strcmp(a->attr.name, "discard_granularity")) { 178 if (t == 0 || t > MAX_PLIST_NUM) 179 return -EINVAL; 180 if (t == *ui) 181 return count; 182 *ui = t; 183 return count; 184 } 185 186 *ui = t; 187 188 if (!strcmp(a->attr.name, "iostat_enable") && *ui == 0) 189 f2fs_reset_iostat(sbi); 190 if (!strcmp(a->attr.name, "gc_urgent") && t == 1 && sbi->gc_thread) { 191 sbi->gc_thread->gc_wake = 1; 192 wake_up_interruptible_all(&sbi->gc_thread->gc_wait_queue_head); 193 wake_up_discard_thread(sbi, true); 194 } 195 196 return count; 197 } 198 199 static ssize_t f2fs_attr_show(struct kobject *kobj, 200 struct attribute *attr, char *buf) 201 { 202 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, 203 s_kobj); 204 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); 205 206 return a->show ? a->show(a, sbi, buf) : 0; 207 } 208 209 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr, 210 const char *buf, size_t len) 211 { 212 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, 213 s_kobj); 214 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); 215 216 return a->store ? a->store(a, sbi, buf, len) : 0; 217 } 218 219 static void f2fs_sb_release(struct kobject *kobj) 220 { 221 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, 222 s_kobj); 223 complete(&sbi->s_kobj_unregister); 224 } 225 226 enum feat_id { 227 FEAT_CRYPTO = 0, 228 FEAT_BLKZONED, 229 FEAT_ATOMIC_WRITE, 230 FEAT_EXTRA_ATTR, 231 FEAT_PROJECT_QUOTA, 232 FEAT_INODE_CHECKSUM, 233 FEAT_FLEXIBLE_INLINE_XATTR, 234 FEAT_QUOTA_INO, 235 }; 236 237 static ssize_t f2fs_feature_show(struct f2fs_attr *a, 238 struct f2fs_sb_info *sbi, char *buf) 239 { 240 switch (a->id) { 241 case FEAT_CRYPTO: 242 case FEAT_BLKZONED: 243 case FEAT_ATOMIC_WRITE: 244 case FEAT_EXTRA_ATTR: 245 case FEAT_PROJECT_QUOTA: 246 case FEAT_INODE_CHECKSUM: 247 case FEAT_FLEXIBLE_INLINE_XATTR: 248 case FEAT_QUOTA_INO: 249 return snprintf(buf, PAGE_SIZE, "supported\n"); 250 } 251 return 0; 252 } 253 254 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \ 255 static struct f2fs_attr f2fs_attr_##_name = { \ 256 .attr = {.name = __stringify(_name), .mode = _mode }, \ 257 .show = _show, \ 258 .store = _store, \ 259 .struct_type = _struct_type, \ 260 .offset = _offset \ 261 } 262 263 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \ 264 F2FS_ATTR_OFFSET(struct_type, name, 0644, \ 265 f2fs_sbi_show, f2fs_sbi_store, \ 266 offsetof(struct struct_name, elname)) 267 268 #define F2FS_GENERAL_RO_ATTR(name) \ 269 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL) 270 271 #define F2FS_FEATURE_RO_ATTR(_name, _id) \ 272 static struct f2fs_attr f2fs_attr_##_name = { \ 273 .attr = {.name = __stringify(_name), .mode = 0444 }, \ 274 .show = f2fs_feature_show, \ 275 .id = _id, \ 276 } 277 278 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time, 279 urgent_sleep_time); 280 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time); 281 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time); 282 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time); 283 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle); 284 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent, gc_urgent); 285 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); 286 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards); 287 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity); 288 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks); 289 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections); 290 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy); 291 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util); 292 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks); 293 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks); 294 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections); 295 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh); 296 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages); 297 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio); 298 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search); 299 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level); 300 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]); 301 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]); 302 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable); 303 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra); 304 #ifdef CONFIG_F2FS_FAULT_INJECTION 305 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate); 306 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type); 307 #endif 308 F2FS_GENERAL_RO_ATTR(dirty_segments); 309 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes); 310 F2FS_GENERAL_RO_ATTR(features); 311 F2FS_GENERAL_RO_ATTR(current_reserved_blocks); 312 313 #ifdef CONFIG_F2FS_FS_ENCRYPTION 314 F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO); 315 #endif 316 #ifdef CONFIG_BLK_DEV_ZONED 317 F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED); 318 #endif 319 F2FS_FEATURE_RO_ATTR(atomic_write, FEAT_ATOMIC_WRITE); 320 F2FS_FEATURE_RO_ATTR(extra_attr, FEAT_EXTRA_ATTR); 321 F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA); 322 F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM); 323 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr, FEAT_FLEXIBLE_INLINE_XATTR); 324 F2FS_FEATURE_RO_ATTR(quota_ino, FEAT_QUOTA_INO); 325 326 #define ATTR_LIST(name) (&f2fs_attr_##name.attr) 327 static struct attribute *f2fs_attrs[] = { 328 ATTR_LIST(gc_urgent_sleep_time), 329 ATTR_LIST(gc_min_sleep_time), 330 ATTR_LIST(gc_max_sleep_time), 331 ATTR_LIST(gc_no_gc_sleep_time), 332 ATTR_LIST(gc_idle), 333 ATTR_LIST(gc_urgent), 334 ATTR_LIST(reclaim_segments), 335 ATTR_LIST(max_small_discards), 336 ATTR_LIST(discard_granularity), 337 ATTR_LIST(batched_trim_sections), 338 ATTR_LIST(ipu_policy), 339 ATTR_LIST(min_ipu_util), 340 ATTR_LIST(min_fsync_blocks), 341 ATTR_LIST(min_hot_blocks), 342 ATTR_LIST(min_ssr_sections), 343 ATTR_LIST(max_victim_search), 344 ATTR_LIST(dir_level), 345 ATTR_LIST(ram_thresh), 346 ATTR_LIST(ra_nid_pages), 347 ATTR_LIST(dirty_nats_ratio), 348 ATTR_LIST(cp_interval), 349 ATTR_LIST(idle_interval), 350 ATTR_LIST(iostat_enable), 351 ATTR_LIST(readdir_ra), 352 #ifdef CONFIG_F2FS_FAULT_INJECTION 353 ATTR_LIST(inject_rate), 354 ATTR_LIST(inject_type), 355 #endif 356 ATTR_LIST(dirty_segments), 357 ATTR_LIST(lifetime_write_kbytes), 358 ATTR_LIST(features), 359 ATTR_LIST(reserved_blocks), 360 ATTR_LIST(current_reserved_blocks), 361 NULL, 362 }; 363 364 static struct attribute *f2fs_feat_attrs[] = { 365 #ifdef CONFIG_F2FS_FS_ENCRYPTION 366 ATTR_LIST(encryption), 367 #endif 368 #ifdef CONFIG_BLK_DEV_ZONED 369 ATTR_LIST(block_zoned), 370 #endif 371 ATTR_LIST(atomic_write), 372 ATTR_LIST(extra_attr), 373 ATTR_LIST(project_quota), 374 ATTR_LIST(inode_checksum), 375 ATTR_LIST(flexible_inline_xattr), 376 ATTR_LIST(quota_ino), 377 NULL, 378 }; 379 380 static const struct sysfs_ops f2fs_attr_ops = { 381 .show = f2fs_attr_show, 382 .store = f2fs_attr_store, 383 }; 384 385 static struct kobj_type f2fs_sb_ktype = { 386 .default_attrs = f2fs_attrs, 387 .sysfs_ops = &f2fs_attr_ops, 388 .release = f2fs_sb_release, 389 }; 390 391 static struct kobj_type f2fs_ktype = { 392 .sysfs_ops = &f2fs_attr_ops, 393 }; 394 395 static struct kset f2fs_kset = { 396 .kobj = {.ktype = &f2fs_ktype}, 397 }; 398 399 static struct kobj_type f2fs_feat_ktype = { 400 .default_attrs = f2fs_feat_attrs, 401 .sysfs_ops = &f2fs_attr_ops, 402 }; 403 404 static struct kobject f2fs_feat = { 405 .kset = &f2fs_kset, 406 }; 407 408 static int segment_info_seq_show(struct seq_file *seq, void *offset) 409 { 410 struct super_block *sb = seq->private; 411 struct f2fs_sb_info *sbi = F2FS_SB(sb); 412 unsigned int total_segs = 413 le32_to_cpu(sbi->raw_super->segment_count_main); 414 int i; 415 416 seq_puts(seq, "format: segment_type|valid_blocks\n" 417 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); 418 419 for (i = 0; i < total_segs; i++) { 420 struct seg_entry *se = get_seg_entry(sbi, i); 421 422 if ((i % 10) == 0) 423 seq_printf(seq, "%-10d", i); 424 seq_printf(seq, "%d|%-3u", se->type, 425 get_valid_blocks(sbi, i, false)); 426 if ((i % 10) == 9 || i == (total_segs - 1)) 427 seq_putc(seq, '\n'); 428 else 429 seq_putc(seq, ' '); 430 } 431 432 return 0; 433 } 434 435 static int segment_bits_seq_show(struct seq_file *seq, void *offset) 436 { 437 struct super_block *sb = seq->private; 438 struct f2fs_sb_info *sbi = F2FS_SB(sb); 439 unsigned int total_segs = 440 le32_to_cpu(sbi->raw_super->segment_count_main); 441 int i, j; 442 443 seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n" 444 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); 445 446 for (i = 0; i < total_segs; i++) { 447 struct seg_entry *se = get_seg_entry(sbi, i); 448 449 seq_printf(seq, "%-10d", i); 450 seq_printf(seq, "%d|%-3u|", se->type, 451 get_valid_blocks(sbi, i, false)); 452 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++) 453 seq_printf(seq, " %.2x", se->cur_valid_map[j]); 454 seq_putc(seq, '\n'); 455 } 456 return 0; 457 } 458 459 static int iostat_info_seq_show(struct seq_file *seq, void *offset) 460 { 461 struct super_block *sb = seq->private; 462 struct f2fs_sb_info *sbi = F2FS_SB(sb); 463 time64_t now = ktime_get_real_seconds(); 464 465 if (!sbi->iostat_enable) 466 return 0; 467 468 seq_printf(seq, "time: %-16llu\n", now); 469 470 /* print app IOs */ 471 seq_printf(seq, "app buffered: %-16llu\n", 472 sbi->write_iostat[APP_BUFFERED_IO]); 473 seq_printf(seq, "app direct: %-16llu\n", 474 sbi->write_iostat[APP_DIRECT_IO]); 475 seq_printf(seq, "app mapped: %-16llu\n", 476 sbi->write_iostat[APP_MAPPED_IO]); 477 478 /* print fs IOs */ 479 seq_printf(seq, "fs data: %-16llu\n", 480 sbi->write_iostat[FS_DATA_IO]); 481 seq_printf(seq, "fs node: %-16llu\n", 482 sbi->write_iostat[FS_NODE_IO]); 483 seq_printf(seq, "fs meta: %-16llu\n", 484 sbi->write_iostat[FS_META_IO]); 485 seq_printf(seq, "fs gc data: %-16llu\n", 486 sbi->write_iostat[FS_GC_DATA_IO]); 487 seq_printf(seq, "fs gc node: %-16llu\n", 488 sbi->write_iostat[FS_GC_NODE_IO]); 489 seq_printf(seq, "fs cp data: %-16llu\n", 490 sbi->write_iostat[FS_CP_DATA_IO]); 491 seq_printf(seq, "fs cp node: %-16llu\n", 492 sbi->write_iostat[FS_CP_NODE_IO]); 493 seq_printf(seq, "fs cp meta: %-16llu\n", 494 sbi->write_iostat[FS_CP_META_IO]); 495 seq_printf(seq, "fs discard: %-16llu\n", 496 sbi->write_iostat[FS_DISCARD]); 497 498 return 0; 499 } 500 501 #define F2FS_PROC_FILE_DEF(_name) \ 502 static int _name##_open_fs(struct inode *inode, struct file *file) \ 503 { \ 504 return single_open(file, _name##_seq_show, PDE_DATA(inode)); \ 505 } \ 506 \ 507 static const struct file_operations f2fs_seq_##_name##_fops = { \ 508 .open = _name##_open_fs, \ 509 .read = seq_read, \ 510 .llseek = seq_lseek, \ 511 .release = single_release, \ 512 }; 513 514 F2FS_PROC_FILE_DEF(segment_info); 515 F2FS_PROC_FILE_DEF(segment_bits); 516 F2FS_PROC_FILE_DEF(iostat_info); 517 518 int __init f2fs_init_sysfs(void) 519 { 520 int ret; 521 522 kobject_set_name(&f2fs_kset.kobj, "f2fs"); 523 f2fs_kset.kobj.parent = fs_kobj; 524 ret = kset_register(&f2fs_kset); 525 if (ret) 526 return ret; 527 528 ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype, 529 NULL, "features"); 530 if (ret) 531 kset_unregister(&f2fs_kset); 532 else 533 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); 534 return ret; 535 } 536 537 void f2fs_exit_sysfs(void) 538 { 539 kobject_put(&f2fs_feat); 540 kset_unregister(&f2fs_kset); 541 remove_proc_entry("fs/f2fs", NULL); 542 f2fs_proc_root = NULL; 543 } 544 545 int f2fs_register_sysfs(struct f2fs_sb_info *sbi) 546 { 547 struct super_block *sb = sbi->sb; 548 int err; 549 550 sbi->s_kobj.kset = &f2fs_kset; 551 init_completion(&sbi->s_kobj_unregister); 552 err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL, 553 "%s", sb->s_id); 554 if (err) 555 return err; 556 557 if (f2fs_proc_root) 558 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); 559 560 if (sbi->s_proc) { 561 proc_create_data("segment_info", S_IRUGO, sbi->s_proc, 562 &f2fs_seq_segment_info_fops, sb); 563 proc_create_data("segment_bits", S_IRUGO, sbi->s_proc, 564 &f2fs_seq_segment_bits_fops, sb); 565 proc_create_data("iostat_info", S_IRUGO, sbi->s_proc, 566 &f2fs_seq_iostat_info_fops, sb); 567 } 568 return 0; 569 } 570 571 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi) 572 { 573 if (sbi->s_proc) { 574 remove_proc_entry("iostat_info", sbi->s_proc); 575 remove_proc_entry("segment_info", sbi->s_proc); 576 remove_proc_entry("segment_bits", sbi->s_proc); 577 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root); 578 } 579 kobject_del(&sbi->s_kobj); 580 } 581