fs/f2fs/sysfs.c

   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 int __init f2fs_init_sysfs(void)
 576 {
 577         int ret;
 578
 579         kobject_set_name(&f2fs_kset.kobj, "f2fs");
 580         f2fs_kset.kobj.parent = fs_kobj;
 581         ret = kset_register(&f2fs_kset);
 582         if (ret)
 583                 return ret;
 584
 585         ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
 586                                    NULL, "features");
 587         if (ret)
 588                 kset_unregister(&f2fs_kset);
 589         else
 590                 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
 591         return ret;
 592 }
 593
 594 void f2fs_exit_sysfs(void)
 595 {
 596         kobject_put(&f2fs_feat);
 597         kset_unregister(&f2fs_kset);
 598         remove_proc_entry("fs/f2fs", NULL);
 599         f2fs_proc_root = NULL;
 600 }
 601
 602 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
 603 {
 604         struct super_block *sb = sbi->sb;
 605         int err;
 606
 607         sbi->s_kobj.kset = &f2fs_kset;
 608         init_completion(&sbi->s_kobj_unregister);
 609         err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
 610                                 "%s", sb->s_id);
 611         if (err)
 612                 return err;
 613
 614         if (f2fs_proc_root)
 615                 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
 616
 617         if (sbi->s_proc) {
 618                 proc_create_single_data("segment_info", S_IRUGO, sbi->s_proc,
 619                                 segment_info_seq_show, sb);
 620                 proc_create_single_data("segment_bits", S_IRUGO, sbi->s_proc,
 621                                 segment_bits_seq_show, sb);
 622                 proc_create_single_data("iostat_info", S_IRUGO, sbi->s_proc,
 623                                 iostat_info_seq_show, sb);
 624         }
 625         return 0;
 626 }
 627
 628 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
 629 {
 630         if (sbi->s_proc) {
 631                 remove_proc_entry("iostat_info", sbi->s_proc);
 632                 remove_proc_entry("segment_info", sbi->s_proc);
 633                 remove_proc_entry("segment_bits", sbi->s_proc);
 634                 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
 635         }
 636         kobject_del(&sbi->s_kobj);
 637 }