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 <[email protected]>
   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 extension:\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 extension:\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 __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 = f2fs_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                         f2fs_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         if (!strcmp(a->attr.name, "trim_sections"))
 249                 return -EINVAL;
 250
 251         if (!strcmp(a->attr.name, "gc_urgent")) {
 252                 if (t >= 1) {
 253                         sbi->gc_mode = GC_URGENT;
 254                         if (sbi->gc_thread) {
 255                                 wake_up_interruptible_all(
 256                                         &sbi->gc_thread->gc_wait_queue_head);
 257                                 wake_up_discard_thread(sbi, true);
 258                         }
 259                 } else {
 260                         sbi->gc_mode = GC_NORMAL;
 261                 }
 262                 return count;
 263         }
 264         if (!strcmp(a->attr.name, "gc_idle")) {
 265                 if (t == GC_IDLE_CB)
 266                         sbi->gc_mode = GC_IDLE_CB;
 267                 else if (t == GC_IDLE_GREEDY)
 268                         sbi->gc_mode = GC_IDLE_GREEDY;
 269                 else
 270                         sbi->gc_mode = GC_NORMAL;
 271                 return count;
 272         }
 273
 274         *ui = t;
 275
 276         if (!strcmp(a->attr.name, "iostat_enable") && *ui == 0)
 277                 f2fs_reset_iostat(sbi);
 278         return count;
 279 }
 280
 281 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
 282                         struct f2fs_sb_info *sbi,
 283                         const char *buf, size_t count)
 284 {
 285         ssize_t ret;
 286         bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
 287                                         a->struct_type == GC_THREAD);
 288
 289         if (gc_entry)
 290                 down_read(&sbi->sb->s_umount);
 291         ret = __sbi_store(a, sbi, buf, count);
 292         if (gc_entry)
 293                 up_read(&sbi->sb->s_umount);
 294
 295         return ret;
 296 }
 297
 298 static ssize_t f2fs_attr_show(struct kobject *kobj,
 299                                 struct attribute *attr, char *buf)
 300 {
 301         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 302                                                                 s_kobj);
 303         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 304
 305         return a->show ? a->show(a, sbi, buf) : 0;
 306 }
 307
 308 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
 309                                                 const char *buf, size_t len)
 310 {
 311         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 312                                                                         s_kobj);
 313         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 314
 315         return a->store ? a->store(a, sbi, buf, len) : 0;
 316 }
 317
 318 static void f2fs_sb_release(struct kobject *kobj)
 319 {
 320         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 321                                                                 s_kobj);
 322         complete(&sbi->s_kobj_unregister);
 323 }
 324
 325 enum feat_id {
 326         FEAT_CRYPTO = 0,
 327         FEAT_BLKZONED,
 328         FEAT_ATOMIC_WRITE,
 329         FEAT_EXTRA_ATTR,
 330         FEAT_PROJECT_QUOTA,
 331         FEAT_INODE_CHECKSUM,
 332         FEAT_FLEXIBLE_INLINE_XATTR,
 333         FEAT_QUOTA_INO,
 334         FEAT_INODE_CRTIME,
 335         FEAT_LOST_FOUND,
 336 };
 337
 338 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
 339                 struct f2fs_sb_info *sbi, char *buf)
 340 {
 341         switch (a->id) {
 342         case FEAT_CRYPTO:
 343         case FEAT_BLKZONED:
 344         case FEAT_ATOMIC_WRITE:
 345         case FEAT_EXTRA_ATTR:
 346         case FEAT_PROJECT_QUOTA:
 347         case FEAT_INODE_CHECKSUM:
 348         case FEAT_FLEXIBLE_INLINE_XATTR:
 349         case FEAT_QUOTA_INO:
 350         case FEAT_INODE_CRTIME:
 351         case FEAT_LOST_FOUND:
 352                 return snprintf(buf, PAGE_SIZE, "supported\n");
 353         }
 354         return 0;
 355 }
 356
 357 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
 358 static struct f2fs_attr f2fs_attr_##_name = {                   \
 359         .attr = {.name = __stringify(_name), .mode = _mode },   \
 360         .show   = _show,                                        \
 361         .store  = _store,                                       \
 362         .struct_type = _struct_type,                            \
 363         .offset = _offset                                       \
 364 }
 365
 366 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname)    \
 367         F2FS_ATTR_OFFSET(struct_type, name, 0644,               \
 368                 f2fs_sbi_show, f2fs_sbi_store,                  \
 369                 offsetof(struct struct_name, elname))
 370
 371 #define F2FS_GENERAL_RO_ATTR(name) \
 372 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
 373
 374 #define F2FS_FEATURE_RO_ATTR(_name, _id)                        \
 375 static struct f2fs_attr f2fs_attr_##_name = {                   \
 376         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 377         .show   = f2fs_feature_show,                            \
 378         .id     = _id,                                          \
 379 }
 380
 381 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
 382                                                         urgent_sleep_time);
 383 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
 384 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
 385 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
 386 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle, gc_mode);
 387 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent, gc_mode);
 388 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
 389 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
 390 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
 391 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
 392 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
 393 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
 394 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
 395 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
 396 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
 397 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections);
 398 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
 399 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
 400 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
 401 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
 402 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
 403 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
 404 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
 405 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
 406 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
 407 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
 408 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
 409 #ifdef CONFIG_F2FS_FAULT_INJECTION
 410 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
 411 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
 412 #endif
 413 F2FS_GENERAL_RO_ATTR(dirty_segments);
 414 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
 415 F2FS_GENERAL_RO_ATTR(features);
 416 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
 417
 418 #ifdef CONFIG_F2FS_FS_ENCRYPTION
 419 F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO);
 420 #endif
 421 #ifdef CONFIG_BLK_DEV_ZONED
 422 F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED);
 423 #endif
 424 F2FS_FEATURE_RO_ATTR(atomic_write, FEAT_ATOMIC_WRITE);
 425 F2FS_FEATURE_RO_ATTR(extra_attr, FEAT_EXTRA_ATTR);
 426 F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA);
 427 F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM);
 428 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr, FEAT_FLEXIBLE_INLINE_XATTR);
 429 F2FS_FEATURE_RO_ATTR(quota_ino, FEAT_QUOTA_INO);
 430 F2FS_FEATURE_RO_ATTR(inode_crtime, FEAT_INODE_CRTIME);
 431 F2FS_FEATURE_RO_ATTR(lost_found, FEAT_LOST_FOUND);
 432
 433 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
 434 static struct attribute *f2fs_attrs[] = {
 435         ATTR_LIST(gc_urgent_sleep_time),
 436         ATTR_LIST(gc_min_sleep_time),
 437         ATTR_LIST(gc_max_sleep_time),
 438         ATTR_LIST(gc_no_gc_sleep_time),
 439         ATTR_LIST(gc_idle),
 440         ATTR_LIST(gc_urgent),
 441         ATTR_LIST(reclaim_segments),
 442         ATTR_LIST(max_small_discards),
 443         ATTR_LIST(discard_granularity),
 444         ATTR_LIST(batched_trim_sections),
 445         ATTR_LIST(ipu_policy),
 446         ATTR_LIST(min_ipu_util),
 447         ATTR_LIST(min_fsync_blocks),
 448         ATTR_LIST(min_hot_blocks),
 449         ATTR_LIST(min_ssr_sections),
 450         ATTR_LIST(max_victim_search),
 451         ATTR_LIST(dir_level),
 452         ATTR_LIST(ram_thresh),
 453         ATTR_LIST(ra_nid_pages),
 454         ATTR_LIST(dirty_nats_ratio),
 455         ATTR_LIST(cp_interval),
 456         ATTR_LIST(idle_interval),
 457         ATTR_LIST(iostat_enable),
 458         ATTR_LIST(readdir_ra),
 459         ATTR_LIST(gc_pin_file_thresh),
 460         ATTR_LIST(extension_list),
 461 #ifdef CONFIG_F2FS_FAULT_INJECTION
 462         ATTR_LIST(inject_rate),
 463         ATTR_LIST(inject_type),
 464 #endif
 465         ATTR_LIST(dirty_segments),
 466         ATTR_LIST(lifetime_write_kbytes),
 467         ATTR_LIST(features),
 468         ATTR_LIST(reserved_blocks),
 469         ATTR_LIST(current_reserved_blocks),
 470         NULL,
 471 };
 472
 473 static struct attribute *f2fs_feat_attrs[] = {
 474 #ifdef CONFIG_F2FS_FS_ENCRYPTION
 475         ATTR_LIST(encryption),
 476 #endif
 477 #ifdef CONFIG_BLK_DEV_ZONED
 478         ATTR_LIST(block_zoned),
 479 #endif
 480         ATTR_LIST(atomic_write),
 481         ATTR_LIST(extra_attr),
 482         ATTR_LIST(project_quota),
 483         ATTR_LIST(inode_checksum),
 484         ATTR_LIST(flexible_inline_xattr),
 485         ATTR_LIST(quota_ino),
 486         ATTR_LIST(inode_crtime),
 487         ATTR_LIST(lost_found),
 488         NULL,
 489 };
 490
 491 static const struct sysfs_ops f2fs_attr_ops = {
 492         .show   = f2fs_attr_show,
 493         .store  = f2fs_attr_store,
 494 };
 495
 496 static struct kobj_type f2fs_sb_ktype = {
 497         .default_attrs  = f2fs_attrs,
 498         .sysfs_ops      = &f2fs_attr_ops,
 499         .release        = f2fs_sb_release,
 500 };
 501
 502 static struct kobj_type f2fs_ktype = {
 503         .sysfs_ops      = &f2fs_attr_ops,
 504 };
 505
 506 static struct kset f2fs_kset = {
 507         .kobj   = {.ktype = &f2fs_ktype},
 508 };
 509
 510 static struct kobj_type f2fs_feat_ktype = {
 511         .default_attrs  = f2fs_feat_attrs,
 512         .sysfs_ops      = &f2fs_attr_ops,
 513 };
 514
 515 static struct kobject f2fs_feat = {
 516         .kset   = &f2fs_kset,
 517 };
 518
 519 static int segment_info_seq_show(struct seq_file *seq, void *offset)
 520 {
 521         struct super_block *sb = seq->private;
 522         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 523         unsigned int total_segs =
 524                         le32_to_cpu(sbi->raw_super->segment_count_main);
 525         int i;
 526
 527         seq_puts(seq, "format: segment_type|valid_blocks\n"
 528                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
 529
 530         for (i = 0; i < total_segs; i++) {
 531                 struct seg_entry *se = get_seg_entry(sbi, i);
 532
 533                 if ((i % 10) == 0)
 534                         seq_printf(seq, "%-10d", i);
 535                 seq_printf(seq, "%d|%-3u", se->type,
 536                                         get_valid_blocks(sbi, i, false));
 537                 if ((i % 10) == 9 || i == (total_segs - 1))
 538                         seq_putc(seq, '\n');
 539                 else
 540                         seq_putc(seq, ' ');
 541         }
 542
 543         return 0;
 544 }
 545
 546 static int segment_bits_seq_show(struct seq_file *seq, void *offset)
 547 {
 548         struct super_block *sb = seq->private;
 549         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 550         unsigned int total_segs =
 551                         le32_to_cpu(sbi->raw_super->segment_count_main);
 552         int i, j;
 553
 554         seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
 555                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
 556
 557         for (i = 0; i < total_segs; i++) {
 558                 struct seg_entry *se = get_seg_entry(sbi, i);
 559
 560                 seq_printf(seq, "%-10d", i);
 561                 seq_printf(seq, "%d|%-3u|", se->type,
 562                                         get_valid_blocks(sbi, i, false));
 563                 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
 564                         seq_printf(seq, " %.2x", se->cur_valid_map[j]);
 565                 seq_putc(seq, '\n');
 566         }
 567         return 0;
 568 }
 569
 570 static int iostat_info_seq_show(struct seq_file *seq, void *offset)
 571 {
 572         struct super_block *sb = seq->private;
 573         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 574         time64_t now = ktime_get_real_seconds();
 575
 576         if (!sbi->iostat_enable)
 577                 return 0;
 578
 579         seq_printf(seq, "time:          %-16llu\n", now);
 580
 581         /* print app IOs */
 582         seq_printf(seq, "app buffered:  %-16llu\n",
 583                                 sbi->write_iostat[APP_BUFFERED_IO]);
 584         seq_printf(seq, "app direct:    %-16llu\n",
 585                                 sbi->write_iostat[APP_DIRECT_IO]);
 586         seq_printf(seq, "app mapped:    %-16llu\n",
 587                                 sbi->write_iostat[APP_MAPPED_IO]);
 588
 589         /* print fs IOs */
 590         seq_printf(seq, "fs data:       %-16llu\n",
 591                                 sbi->write_iostat[FS_DATA_IO]);
 592         seq_printf(seq, "fs node:       %-16llu\n",
 593                                 sbi->write_iostat[FS_NODE_IO]);
 594         seq_printf(seq, "fs meta:       %-16llu\n",
 595                                 sbi->write_iostat[FS_META_IO]);
 596         seq_printf(seq, "fs gc data:    %-16llu\n",
 597                                 sbi->write_iostat[FS_GC_DATA_IO]);
 598         seq_printf(seq, "fs gc node:    %-16llu\n",
 599                                 sbi->write_iostat[FS_GC_NODE_IO]);
 600         seq_printf(seq, "fs cp data:    %-16llu\n",
 601                                 sbi->write_iostat[FS_CP_DATA_IO]);
 602         seq_printf(seq, "fs cp node:    %-16llu\n",
 603                                 sbi->write_iostat[FS_CP_NODE_IO]);
 604         seq_printf(seq, "fs cp meta:    %-16llu\n",
 605                                 sbi->write_iostat[FS_CP_META_IO]);
 606         seq_printf(seq, "fs discard:    %-16llu\n",
 607                                 sbi->write_iostat[FS_DISCARD]);
 608
 609         return 0;
 610 }
 611
 612 int __init f2fs_init_sysfs(void)
 613 {
 614         int ret;
 615
 616         kobject_set_name(&f2fs_kset.kobj, "f2fs");
 617         f2fs_kset.kobj.parent = fs_kobj;
 618         ret = kset_register(&f2fs_kset);
 619         if (ret)
 620                 return ret;
 621
 622         ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
 623                                    NULL, "features");
 624         if (ret)
 625                 kset_unregister(&f2fs_kset);
 626         else
 627                 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
 628         return ret;
 629 }
 630
 631 void f2fs_exit_sysfs(void)
 632 {
 633         kobject_put(&f2fs_feat);
 634         kset_unregister(&f2fs_kset);
 635         remove_proc_entry("fs/f2fs", NULL);
 636         f2fs_proc_root = NULL;
 637 }
 638
 639 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
 640 {
 641         struct super_block *sb = sbi->sb;
 642         int err;
 643
 644         sbi->s_kobj.kset = &f2fs_kset;
 645         init_completion(&sbi->s_kobj_unregister);
 646         err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
 647                                 "%s", sb->s_id);
 648         if (err)
 649                 return err;
 650
 651         if (f2fs_proc_root)
 652                 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
 653
 654         if (sbi->s_proc) {
 655                 proc_create_single_data("segment_info", S_IRUGO, sbi->s_proc,
 656                                 segment_info_seq_show, sb);
 657                 proc_create_single_data("segment_bits", S_IRUGO, sbi->s_proc,
 658                                 segment_bits_seq_show, sb);
 659                 proc_create_single_data("iostat_info", S_IRUGO, sbi->s_proc,
 660                                 iostat_info_seq_show, sb);
 661         }
 662         return 0;
 663 }
 664
 665 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
 666 {
 667         if (sbi->s_proc) {
 668                 remove_proc_entry("iostat_info", sbi->s_proc);
 669                 remove_proc_entry("segment_info", sbi->s_proc);
 670                 remove_proc_entry("segment_bits", sbi->s_proc);
 671                 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
 672         }
 673         kobject_del(&sbi->s_kobj);
 674 }