fs/f2fs/sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * f2fs sysfs interface
   4  *
   5  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
   6  *             http://www.samsung.com/
   7  * Copyright (c) 2017 Chao Yu <chao@kernel.org>
   8  */
   9 #include <linux/compiler.h>
  10 #include <linux/proc_fs.h>
  11 #include <linux/f2fs_fs.h>
  12 #include <linux/seq_file.h>
  13 #include <linux/unicode.h>
  14 #include <linux/ioprio.h>
  15 #include <linux/sysfs.h>
  16
  17 #include "f2fs.h"
  18 #include "segment.h"
  19 #include "gc.h"
  20 #include "iostat.h"
  21 #include <trace/events/f2fs.h>
  22
  23 static struct proc_dir_entry *f2fs_proc_root;
  24
  25 /* Sysfs support for f2fs */
  26 enum {
  27         GC_THREAD,      /* struct f2fs_gc_thread */
  28         SM_INFO,        /* struct f2fs_sm_info */
  29         DCC_INFO,       /* struct discard_cmd_control */
  30         NM_INFO,        /* struct f2fs_nm_info */
  31         F2FS_SBI,       /* struct f2fs_sb_info */
  32 #ifdef CONFIG_F2FS_STAT_FS
  33         STAT_INFO,      /* struct f2fs_stat_info */
  34 #endif
  35 #ifdef CONFIG_F2FS_FAULT_INJECTION
  36         FAULT_INFO_RATE,        /* struct f2fs_fault_info */
  37         FAULT_INFO_TYPE,        /* struct f2fs_fault_info */
  38 #endif
  39         RESERVED_BLOCKS,        /* struct f2fs_sb_info */
  40         CPRC_INFO,      /* struct ckpt_req_control */
  41         ATGC_INFO,      /* struct atgc_management */
  42 };
  43
  44 struct f2fs_attr {
  45         struct attribute attr;
  46         ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
  47         ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
  48                          const char *, size_t);
  49         int struct_type;
  50         int offset;
  51         int id;
  52 };
  53
  54 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
  55                              struct f2fs_sb_info *sbi, char *buf);
  56
  57 static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
  58 {
  59         if (struct_type == GC_THREAD)
  60                 return (unsigned char *)sbi->gc_thread;
  61         else if (struct_type == SM_INFO)
  62                 return (unsigned char *)SM_I(sbi);
  63         else if (struct_type == DCC_INFO)
  64                 return (unsigned char *)SM_I(sbi)->dcc_info;
  65         else if (struct_type == NM_INFO)
  66                 return (unsigned char *)NM_I(sbi);
  67         else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS)
  68                 return (unsigned char *)sbi;
  69 #ifdef CONFIG_F2FS_FAULT_INJECTION
  70         else if (struct_type == FAULT_INFO_RATE ||
  71                                         struct_type == FAULT_INFO_TYPE)
  72                 return (unsigned char *)&F2FS_OPTION(sbi).fault_info;
  73 #endif
  74 #ifdef CONFIG_F2FS_STAT_FS
  75         else if (struct_type == STAT_INFO)
  76                 return (unsigned char *)F2FS_STAT(sbi);
  77 #endif
  78         else if (struct_type == CPRC_INFO)
  79                 return (unsigned char *)&sbi->cprc_info;
  80         else if (struct_type == ATGC_INFO)
  81                 return (unsigned char *)&sbi->am;
  82         return NULL;
  83 }
  84
  85 static ssize_t dirty_segments_show(struct f2fs_attr *a,
  86                 struct f2fs_sb_info *sbi, char *buf)
  87 {
  88         return sprintf(buf, "%llu\n",
  89                         (unsigned long long)(dirty_segments(sbi)));
  90 }
  91
  92 static ssize_t free_segments_show(struct f2fs_attr *a,
  93                 struct f2fs_sb_info *sbi, char *buf)
  94 {
  95         return sprintf(buf, "%llu\n",
  96                         (unsigned long long)(free_segments(sbi)));
  97 }
  98
  99 static ssize_t ovp_segments_show(struct f2fs_attr *a,
 100                 struct f2fs_sb_info *sbi, char *buf)
 101 {
 102         return sprintf(buf, "%llu\n",
 103                         (unsigned long long)(overprovision_segments(sbi)));
 104 }
 105
 106 static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
 107                 struct f2fs_sb_info *sbi, char *buf)
 108 {
 109         return sprintf(buf, "%llu\n",
 110                         (unsigned long long)(sbi->kbytes_written +
 111                         ((f2fs_get_sectors_written(sbi) -
 112                                 sbi->sectors_written_start) >> 1)));
 113 }
 114
 115 static ssize_t sb_status_show(struct f2fs_attr *a,
 116                 struct f2fs_sb_info *sbi, char *buf)
 117 {
 118         return sprintf(buf, "%lx\n", sbi->s_flag);
 119 }
 120
 121 static ssize_t pending_discard_show(struct f2fs_attr *a,
 122                 struct f2fs_sb_info *sbi, char *buf)
 123 {
 124         if (!SM_I(sbi)->dcc_info)
 125                 return -EINVAL;
 126         return sprintf(buf, "%llu\n", (unsigned long long)atomic_read(
 127                                 &SM_I(sbi)->dcc_info->discard_cmd_cnt));
 128 }
 129
 130 static ssize_t features_show(struct f2fs_attr *a,
 131                 struct f2fs_sb_info *sbi, char *buf)
 132 {
 133         int len = 0;
 134
 135         if (f2fs_sb_has_encrypt(sbi))
 136                 len += scnprintf(buf, PAGE_SIZE - len, "%s",
 137                                                 "encryption");
 138         if (f2fs_sb_has_blkzoned(sbi))
 139                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 140                                 len ? ", " : "", "blkzoned");
 141         if (f2fs_sb_has_extra_attr(sbi))
 142                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 143                                 len ? ", " : "", "extra_attr");
 144         if (f2fs_sb_has_project_quota(sbi))
 145                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 146                                 len ? ", " : "", "projquota");
 147         if (f2fs_sb_has_inode_chksum(sbi))
 148                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 149                                 len ? ", " : "", "inode_checksum");
 150         if (f2fs_sb_has_flexible_inline_xattr(sbi))
 151                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 152                                 len ? ", " : "", "flexible_inline_xattr");
 153         if (f2fs_sb_has_quota_ino(sbi))
 154                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 155                                 len ? ", " : "", "quota_ino");
 156         if (f2fs_sb_has_inode_crtime(sbi))
 157                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 158                                 len ? ", " : "", "inode_crtime");
 159         if (f2fs_sb_has_lost_found(sbi))
 160                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 161                                 len ? ", " : "", "lost_found");
 162         if (f2fs_sb_has_verity(sbi))
 163                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 164                                 len ? ", " : "", "verity");
 165         if (f2fs_sb_has_sb_chksum(sbi))
 166                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 167                                 len ? ", " : "", "sb_checksum");
 168         if (f2fs_sb_has_casefold(sbi))
 169                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 170                                 len ? ", " : "", "casefold");
 171         if (f2fs_sb_has_readonly(sbi))
 172                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 173                                 len ? ", " : "", "readonly");
 174         if (f2fs_sb_has_compression(sbi))
 175                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 176                                 len ? ", " : "", "compression");
 177         len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 178                                 len ? ", " : "", "pin_file");
 179         len += scnprintf(buf + len, PAGE_SIZE - len, "\n");
 180         return len;
 181 }
 182
 183 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
 184                                         struct f2fs_sb_info *sbi, char *buf)
 185 {
 186         return sprintf(buf, "%u\n", sbi->current_reserved_blocks);
 187 }
 188
 189 static ssize_t unusable_show(struct f2fs_attr *a,
 190                 struct f2fs_sb_info *sbi, char *buf)
 191 {
 192         block_t unusable;
 193
 194         if (test_opt(sbi, DISABLE_CHECKPOINT))
 195                 unusable = sbi->unusable_block_count;
 196         else
 197                 unusable = f2fs_get_unusable_blocks(sbi);
 198         return sprintf(buf, "%llu\n", (unsigned long long)unusable);
 199 }
 200
 201 static ssize_t encoding_show(struct f2fs_attr *a,
 202                 struct f2fs_sb_info *sbi, char *buf)
 203 {
 204 #ifdef CONFIG_UNICODE
 205         struct super_block *sb = sbi->sb;
 206
 207         if (f2fs_sb_has_casefold(sbi))
 208                 return sysfs_emit(buf, "%s (%d.%d.%d)\n",
 209                         sb->s_encoding->charset,
 210                         (sb->s_encoding->version >> 16) & 0xff,
 211                         (sb->s_encoding->version >> 8) & 0xff,
 212                         sb->s_encoding->version & 0xff);
 213 #endif
 214         return sprintf(buf, "(none)");
 215 }
 216
 217 static ssize_t mounted_time_sec_show(struct f2fs_attr *a,
 218                 struct f2fs_sb_info *sbi, char *buf)
 219 {
 220         return sprintf(buf, "%llu", SIT_I(sbi)->mounted_time);
 221 }
 222
 223 #ifdef CONFIG_F2FS_STAT_FS
 224 static ssize_t moved_blocks_foreground_show(struct f2fs_attr *a,
 225                                 struct f2fs_sb_info *sbi, char *buf)
 226 {
 227         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 228
 229         return sprintf(buf, "%llu\n",
 230                 (unsigned long long)(si->tot_blks -
 231                         (si->bg_data_blks + si->bg_node_blks)));
 232 }
 233
 234 static ssize_t moved_blocks_background_show(struct f2fs_attr *a,
 235                                 struct f2fs_sb_info *sbi, char *buf)
 236 {
 237         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 238
 239         return sprintf(buf, "%llu\n",
 240                 (unsigned long long)(si->bg_data_blks + si->bg_node_blks));
 241 }
 242
 243 static ssize_t avg_vblocks_show(struct f2fs_attr *a,
 244                 struct f2fs_sb_info *sbi, char *buf)
 245 {
 246         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 247
 248         si->dirty_count = dirty_segments(sbi);
 249         f2fs_update_sit_info(sbi);
 250         return sprintf(buf, "%llu\n", (unsigned long long)(si->avg_vblocks));
 251 }
 252 #endif
 253
 254 static ssize_t main_blkaddr_show(struct f2fs_attr *a,
 255                                 struct f2fs_sb_info *sbi, char *buf)
 256 {
 257         return sysfs_emit(buf, "%llu\n",
 258                         (unsigned long long)MAIN_BLKADDR(sbi));
 259 }
 260
 261 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
 262                         struct f2fs_sb_info *sbi, char *buf)
 263 {
 264         unsigned char *ptr = NULL;
 265         unsigned int *ui;
 266
 267         ptr = __struct_ptr(sbi, a->struct_type);
 268         if (!ptr)
 269                 return -EINVAL;
 270
 271         if (!strcmp(a->attr.name, "extension_list")) {
 272                 __u8 (*extlist)[F2FS_EXTENSION_LEN] =
 273                                         sbi->raw_super->extension_list;
 274                 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
 275                 int hot_count = sbi->raw_super->hot_ext_count;
 276                 int len = 0, i;
 277
 278                 len += scnprintf(buf + len, PAGE_SIZE - len,
 279                                                 "cold file extension:\n");
 280                 for (i = 0; i < cold_count; i++)
 281                         len += scnprintf(buf + len, PAGE_SIZE - len, "%s\n",
 282                                                                 extlist[i]);
 283
 284                 len += scnprintf(buf + len, PAGE_SIZE - len,
 285                                                 "hot file extension:\n");
 286                 for (i = cold_count; i < cold_count + hot_count; i++)
 287                         len += scnprintf(buf + len, PAGE_SIZE - len, "%s\n",
 288                                                                 extlist[i]);
 289                 return len;
 290         }
 291
 292         if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
 293                 struct ckpt_req_control *cprc = &sbi->cprc_info;
 294                 int len = 0;
 295                 int class = IOPRIO_PRIO_CLASS(cprc->ckpt_thread_ioprio);
 296                 int data = IOPRIO_PRIO_DATA(cprc->ckpt_thread_ioprio);
 297
 298                 if (class == IOPRIO_CLASS_RT)
 299                         len += scnprintf(buf + len, PAGE_SIZE - len, "rt,");
 300                 else if (class == IOPRIO_CLASS_BE)
 301                         len += scnprintf(buf + len, PAGE_SIZE - len, "be,");
 302                 else
 303                         return -EINVAL;
 304
 305                 len += scnprintf(buf + len, PAGE_SIZE - len, "%d\n", data);
 306                 return len;
 307         }
 308
 309 #ifdef CONFIG_F2FS_FS_COMPRESSION
 310         if (!strcmp(a->attr.name, "compr_written_block"))
 311                 return sysfs_emit(buf, "%llu\n", sbi->compr_written_block);
 312
 313         if (!strcmp(a->attr.name, "compr_saved_block"))
 314                 return sysfs_emit(buf, "%llu\n", sbi->compr_saved_block);
 315
 316         if (!strcmp(a->attr.name, "compr_new_inode"))
 317                 return sysfs_emit(buf, "%u\n", sbi->compr_new_inode);
 318 #endif
 319
 320         if (!strcmp(a->attr.name, "gc_segment_mode"))
 321                 return sysfs_emit(buf, "%u\n", sbi->gc_segment_mode);
 322
 323         if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
 324                 return sysfs_emit(buf, "%u\n",
 325                         sbi->gc_reclaimed_segs[sbi->gc_segment_mode]);
 326         }
 327
 328         ui = (unsigned int *)(ptr + a->offset);
 329
 330         return sprintf(buf, "%u\n", *ui);
 331 }
 332
 333 static ssize_t __sbi_store(struct f2fs_attr *a,
 334                         struct f2fs_sb_info *sbi,
 335                         const char *buf, size_t count)
 336 {
 337         unsigned char *ptr;
 338         unsigned long t;
 339         unsigned int *ui;
 340         ssize_t ret;
 341
 342         ptr = __struct_ptr(sbi, a->struct_type);
 343         if (!ptr)
 344                 return -EINVAL;
 345
 346         if (!strcmp(a->attr.name, "extension_list")) {
 347                 const char *name = strim((char *)buf);
 348                 bool set = true, hot;
 349
 350                 if (!strncmp(name, "[h]", 3))
 351                         hot = true;
 352                 else if (!strncmp(name, "[c]", 3))
 353                         hot = false;
 354                 else
 355                         return -EINVAL;
 356
 357                 name += 3;
 358
 359                 if (*name == '!') {
 360                         name++;
 361                         set = false;
 362                 }
 363
 364                 if (!strlen(name) || strlen(name) >= F2FS_EXTENSION_LEN)
 365                         return -EINVAL;
 366
 367                 down_write(&sbi->sb_lock);
 368
 369                 ret = f2fs_update_extension_list(sbi, name, hot, set);
 370                 if (ret)
 371                         goto out;
 372
 373                 ret = f2fs_commit_super(sbi, false);
 374                 if (ret)
 375                         f2fs_update_extension_list(sbi, name, hot, !set);
 376 out:
 377                 up_write(&sbi->sb_lock);
 378                 return ret ? ret : count;
 379         }
 380
 381         if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
 382                 const char *name = strim((char *)buf);
 383                 struct ckpt_req_control *cprc = &sbi->cprc_info;
 384                 int class;
 385                 long data;
 386                 int ret;
 387
 388                 if (!strncmp(name, "rt,", 3))
 389                         class = IOPRIO_CLASS_RT;
 390                 else if (!strncmp(name, "be,", 3))
 391                         class = IOPRIO_CLASS_BE;
 392                 else
 393                         return -EINVAL;
 394
 395                 name += 3;
 396                 ret = kstrtol(name, 10, &data);
 397                 if (ret)
 398                         return ret;
 399                 if (data >= IOPRIO_NR_LEVELS || data < 0)
 400                         return -EINVAL;
 401
 402                 cprc->ckpt_thread_ioprio = IOPRIO_PRIO_VALUE(class, data);
 403                 if (test_opt(sbi, MERGE_CHECKPOINT)) {
 404                         ret = set_task_ioprio(cprc->f2fs_issue_ckpt,
 405                                         cprc->ckpt_thread_ioprio);
 406                         if (ret)
 407                                 return ret;
 408                 }
 409
 410                 return count;
 411         }
 412
 413         ui = (unsigned int *)(ptr + a->offset);
 414
 415         ret = kstrtoul(skip_spaces(buf), 0, &t);
 416         if (ret < 0)
 417                 return ret;
 418 #ifdef CONFIG_F2FS_FAULT_INJECTION
 419         if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
 420                 return -EINVAL;
 421         if (a->struct_type == FAULT_INFO_RATE && t >= UINT_MAX)
 422                 return -EINVAL;
 423 #endif
 424         if (a->struct_type == RESERVED_BLOCKS) {
 425                 spin_lock(&sbi->stat_lock);
 426                 if (t > (unsigned long)(sbi->user_block_count -
 427                                 F2FS_OPTION(sbi).root_reserved_blocks -
 428                                 sbi->blocks_per_seg *
 429                                 SM_I(sbi)->additional_reserved_segments)) {
 430                         spin_unlock(&sbi->stat_lock);
 431                         return -EINVAL;
 432                 }
 433                 *ui = t;
 434                 sbi->current_reserved_blocks = min(sbi->reserved_blocks,
 435                                 sbi->user_block_count - valid_user_blocks(sbi));
 436                 spin_unlock(&sbi->stat_lock);
 437                 return count;
 438         }
 439
 440         if (!strcmp(a->attr.name, "discard_granularity")) {
 441                 if (t == 0 || t > MAX_PLIST_NUM)
 442                         return -EINVAL;
 443                 if (!f2fs_block_unit_discard(sbi))
 444                         return -EINVAL;
 445                 if (t == *ui)
 446                         return count;
 447                 *ui = t;
 448                 return count;
 449         }
 450
 451         if (!strcmp(a->attr.name, "migration_granularity")) {
 452                 if (t == 0 || t > sbi->segs_per_sec)
 453                         return -EINVAL;
 454         }
 455
 456         if (!strcmp(a->attr.name, "trim_sections"))
 457                 return -EINVAL;
 458
 459         if (!strcmp(a->attr.name, "gc_urgent")) {
 460                 if (t == 0) {
 461                         sbi->gc_mode = GC_NORMAL;
 462                 } else if (t == 1) {
 463                         sbi->gc_mode = GC_URGENT_HIGH;
 464                         if (sbi->gc_thread) {
 465                                 sbi->gc_thread->gc_wake = 1;
 466                                 wake_up_interruptible_all(
 467                                         &sbi->gc_thread->gc_wait_queue_head);
 468                                 wake_up_discard_thread(sbi, true);
 469                         }
 470                 } else if (t == 2) {
 471                         sbi->gc_mode = GC_URGENT_LOW;
 472                 } else {
 473                         return -EINVAL;
 474                 }
 475                 return count;
 476         }
 477         if (!strcmp(a->attr.name, "gc_idle")) {
 478                 if (t == GC_IDLE_CB) {
 479                         sbi->gc_mode = GC_IDLE_CB;
 480                 } else if (t == GC_IDLE_GREEDY) {
 481                         sbi->gc_mode = GC_IDLE_GREEDY;
 482                 } else if (t == GC_IDLE_AT) {
 483                         if (!sbi->am.atgc_enabled)
 484                                 return -EINVAL;
 485                         sbi->gc_mode = GC_AT;
 486                 } else {
 487                         sbi->gc_mode = GC_NORMAL;
 488                 }
 489                 return count;
 490         }
 491
 492         if (!strcmp(a->attr.name, "gc_urgent_high_remaining")) {
 493                 spin_lock(&sbi->gc_urgent_high_lock);
 494                 sbi->gc_urgent_high_limited = t != 0;
 495                 sbi->gc_urgent_high_remaining = t;
 496                 spin_unlock(&sbi->gc_urgent_high_lock);
 497
 498                 return count;
 499         }
 500
 501 #ifdef CONFIG_F2FS_IOSTAT
 502         if (!strcmp(a->attr.name, "iostat_enable")) {
 503                 sbi->iostat_enable = !!t;
 504                 if (!sbi->iostat_enable)
 505                         f2fs_reset_iostat(sbi);
 506                 return count;
 507         }
 508
 509         if (!strcmp(a->attr.name, "iostat_period_ms")) {
 510                 if (t < MIN_IOSTAT_PERIOD_MS || t > MAX_IOSTAT_PERIOD_MS)
 511                         return -EINVAL;
 512                 spin_lock(&sbi->iostat_lock);
 513                 sbi->iostat_period_ms = (unsigned int)t;
 514                 spin_unlock(&sbi->iostat_lock);
 515                 return count;
 516         }
 517 #endif
 518
 519 #ifdef CONFIG_F2FS_FS_COMPRESSION
 520         if (!strcmp(a->attr.name, "compr_written_block") ||
 521                 !strcmp(a->attr.name, "compr_saved_block")) {
 522                 if (t != 0)
 523                         return -EINVAL;
 524                 sbi->compr_written_block = 0;
 525                 sbi->compr_saved_block = 0;
 526                 return count;
 527         }
 528
 529         if (!strcmp(a->attr.name, "compr_new_inode")) {
 530                 if (t != 0)
 531                         return -EINVAL;
 532                 sbi->compr_new_inode = 0;
 533                 return count;
 534         }
 535 #endif
 536
 537         if (!strcmp(a->attr.name, "atgc_candidate_ratio")) {
 538                 if (t > 100)
 539                         return -EINVAL;
 540                 sbi->am.candidate_ratio = t;
 541                 return count;
 542         }
 543
 544         if (!strcmp(a->attr.name, "atgc_age_weight")) {
 545                 if (t > 100)
 546                         return -EINVAL;
 547                 sbi->am.age_weight = t;
 548                 return count;
 549         }
 550
 551         if (!strcmp(a->attr.name, "gc_segment_mode")) {
 552                 if (t < MAX_GC_MODE)
 553                         sbi->gc_segment_mode = t;
 554                 else
 555                         return -EINVAL;
 556                 return count;
 557         }
 558
 559         if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
 560                 if (t != 0)
 561                         return -EINVAL;
 562                 sbi->gc_reclaimed_segs[sbi->gc_segment_mode] = 0;
 563                 return count;
 564         }
 565
 566         if (!strcmp(a->attr.name, "seq_file_ra_mul")) {
 567                 if (t >= MIN_RA_MUL && t <= MAX_RA_MUL)
 568                         sbi->seq_file_ra_mul = t;
 569                 else
 570                         return -EINVAL;
 571                 return count;
 572         }
 573
 574         if (!strcmp(a->attr.name, "max_fragment_chunk")) {
 575                 if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE)
 576                         sbi->max_fragment_chunk = t;
 577                 else
 578                         return -EINVAL;
 579                 return count;
 580         }
 581
 582         if (!strcmp(a->attr.name, "max_fragment_hole")) {
 583                 if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE)
 584                         sbi->max_fragment_hole = t;
 585                 else
 586                         return -EINVAL;
 587                 return count;
 588         }
 589
 590         *ui = (unsigned int)t;
 591
 592         return count;
 593 }
 594
 595 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
 596                         struct f2fs_sb_info *sbi,
 597                         const char *buf, size_t count)
 598 {
 599         ssize_t ret;
 600         bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
 601                                         a->struct_type == GC_THREAD);
 602
 603         if (gc_entry) {
 604                 if (!down_read_trylock(&sbi->sb->s_umount))
 605                         return -EAGAIN;
 606         }
 607         ret = __sbi_store(a, sbi, buf, count);
 608         if (gc_entry)
 609                 up_read(&sbi->sb->s_umount);
 610
 611         return ret;
 612 }
 613
 614 static ssize_t f2fs_attr_show(struct kobject *kobj,
 615                                 struct attribute *attr, char *buf)
 616 {
 617         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 618                                                                 s_kobj);
 619         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 620
 621         return a->show ? a->show(a, sbi, buf) : 0;
 622 }
 623
 624 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
 625                                                 const char *buf, size_t len)
 626 {
 627         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 628                                                                         s_kobj);
 629         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 630
 631         return a->store ? a->store(a, sbi, buf, len) : 0;
 632 }
 633
 634 static void f2fs_sb_release(struct kobject *kobj)
 635 {
 636         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 637                                                                 s_kobj);
 638         complete(&sbi->s_kobj_unregister);
 639 }
 640
 641 /*
 642  * Note that there are three feature list entries:
 643  * 1) /sys/fs/f2fs/features
 644  *   : shows runtime features supported by in-kernel f2fs along with Kconfig.
 645  *     - ref. F2FS_FEATURE_RO_ATTR()
 646  *
 647  * 2) /sys/fs/f2fs/$s_id/features <deprecated>
 648  *   : shows on-disk features enabled by mkfs.f2fs, used for old kernels. This
 649  *     won't add new feature anymore, and thus, users should check entries in 3)
 650  *     instead of this 2).
 651  *
 652  * 3) /sys/fs/f2fs/$s_id/feature_list
 653  *   : shows on-disk features enabled by mkfs.f2fs per instance, which follows
 654  *     sysfs entry rule where each entry should expose single value.
 655  *     This list covers old feature list provided by 2) and beyond. Therefore,
 656  *     please add new on-disk feature in this list only.
 657  *     - ref. F2FS_SB_FEATURE_RO_ATTR()
 658  */
 659 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
 660                 struct f2fs_sb_info *sbi, char *buf)
 661 {
 662         return sprintf(buf, "supported\n");
 663 }
 664
 665 #define F2FS_FEATURE_RO_ATTR(_name)                             \
 666 static struct f2fs_attr f2fs_attr_##_name = {                   \
 667         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 668         .show   = f2fs_feature_show,                            \
 669 }
 670
 671 static ssize_t f2fs_sb_feature_show(struct f2fs_attr *a,
 672                 struct f2fs_sb_info *sbi, char *buf)
 673 {
 674         if (F2FS_HAS_FEATURE(sbi, a->id))
 675                 return sprintf(buf, "supported\n");
 676         return sprintf(buf, "unsupported\n");
 677 }
 678
 679 #define F2FS_SB_FEATURE_RO_ATTR(_name, _feat)                   \
 680 static struct f2fs_attr f2fs_attr_sb_##_name = {                \
 681         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 682         .show   = f2fs_sb_feature_show,                         \
 683         .id     = F2FS_FEATURE_##_feat,                         \
 684 }
 685
 686 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
 687 static struct f2fs_attr f2fs_attr_##_name = {                   \
 688         .attr = {.name = __stringify(_name), .mode = _mode },   \
 689         .show   = _show,                                        \
 690         .store  = _store,                                       \
 691         .struct_type = _struct_type,                            \
 692         .offset = _offset                                       \
 693 }
 694
 695 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname)    \
 696         F2FS_ATTR_OFFSET(struct_type, name, 0644,               \
 697                 f2fs_sbi_show, f2fs_sbi_store,                  \
 698                 offsetof(struct struct_name, elname))
 699
 700 #define F2FS_GENERAL_RO_ATTR(name) \
 701 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
 702
 703 #define F2FS_STAT_ATTR(_struct_type, _struct_name, _name, _elname)      \
 704 static struct f2fs_attr f2fs_attr_##_name = {                   \
 705         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 706         .show = f2fs_sbi_show,                                  \
 707         .struct_type = _struct_type,                            \
 708         .offset = offsetof(struct _struct_name, _elname),       \
 709 }
 710
 711 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
 712                                                         urgent_sleep_time);
 713 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
 714 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
 715 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
 716 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle, gc_mode);
 717 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent, gc_mode);
 718 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
 719 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
 720 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
 721 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
 722 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
 723 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
 724 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
 725 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
 726 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_seq_blocks, min_seq_blocks);
 727 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
 728 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections);
 729 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
 730 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
 731 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
 732 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
 733 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, migration_granularity, migration_granularity);
 734 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
 735 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
 736 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
 737 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, discard_idle_interval,
 738                                         interval_time[DISCARD_TIME]);
 739 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle_interval, interval_time[GC_TIME]);
 740 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info,
 741                 umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]);
 742 #ifdef CONFIG_F2FS_IOSTAT
 743 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
 744 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_period_ms, iostat_period_ms);
 745 #endif
 746 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
 747 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_io_bytes, max_io_bytes);
 748 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
 749 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
 750 #ifdef CONFIG_F2FS_FAULT_INJECTION
 751 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
 752 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
 753 #endif
 754 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, data_io_flag, data_io_flag);
 755 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, node_io_flag, node_io_flag);
 756 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent_high_remaining, gc_urgent_high_remaining);
 757 F2FS_RW_ATTR(CPRC_INFO, ckpt_req_control, ckpt_thread_ioprio, ckpt_thread_ioprio);
 758 F2FS_GENERAL_RO_ATTR(dirty_segments);
 759 F2FS_GENERAL_RO_ATTR(free_segments);
 760 F2FS_GENERAL_RO_ATTR(ovp_segments);
 761 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
 762 F2FS_GENERAL_RO_ATTR(features);
 763 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
 764 F2FS_GENERAL_RO_ATTR(unusable);
 765 F2FS_GENERAL_RO_ATTR(encoding);
 766 F2FS_GENERAL_RO_ATTR(mounted_time_sec);
 767 F2FS_GENERAL_RO_ATTR(main_blkaddr);
 768 F2FS_GENERAL_RO_ATTR(pending_discard);
 769 #ifdef CONFIG_F2FS_STAT_FS
 770 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_foreground_calls, cp_count);
 771 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_background_calls, bg_cp_count);
 772 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, gc_foreground_calls, call_count);
 773 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, gc_background_calls, bg_gc);
 774 F2FS_GENERAL_RO_ATTR(moved_blocks_background);
 775 F2FS_GENERAL_RO_ATTR(moved_blocks_foreground);
 776 F2FS_GENERAL_RO_ATTR(avg_vblocks);
 777 #endif
 778
 779 #ifdef CONFIG_FS_ENCRYPTION
 780 F2FS_FEATURE_RO_ATTR(encryption);
 781 F2FS_FEATURE_RO_ATTR(test_dummy_encryption_v2);
 782 #ifdef CONFIG_UNICODE
 783 F2FS_FEATURE_RO_ATTR(encrypted_casefold);
 784 #endif
 785 #endif /* CONFIG_FS_ENCRYPTION */
 786 #ifdef CONFIG_BLK_DEV_ZONED
 787 F2FS_FEATURE_RO_ATTR(block_zoned);
 788 #endif
 789 F2FS_FEATURE_RO_ATTR(atomic_write);
 790 F2FS_FEATURE_RO_ATTR(extra_attr);
 791 F2FS_FEATURE_RO_ATTR(project_quota);
 792 F2FS_FEATURE_RO_ATTR(inode_checksum);
 793 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr);
 794 F2FS_FEATURE_RO_ATTR(quota_ino);
 795 F2FS_FEATURE_RO_ATTR(inode_crtime);
 796 F2FS_FEATURE_RO_ATTR(lost_found);
 797 #ifdef CONFIG_FS_VERITY
 798 F2FS_FEATURE_RO_ATTR(verity);
 799 #endif
 800 F2FS_FEATURE_RO_ATTR(sb_checksum);
 801 #ifdef CONFIG_UNICODE
 802 F2FS_FEATURE_RO_ATTR(casefold);
 803 #endif
 804 F2FS_FEATURE_RO_ATTR(readonly);
 805 #ifdef CONFIG_F2FS_FS_COMPRESSION
 806 F2FS_FEATURE_RO_ATTR(compression);
 807 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_written_block, compr_written_block);
 808 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_saved_block, compr_saved_block);
 809 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_new_inode, compr_new_inode);
 810 #endif
 811 F2FS_FEATURE_RO_ATTR(pin_file);
 812
 813 /* For ATGC */
 814 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_candidate_ratio, candidate_ratio);
 815 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_candidate_count, max_candidate_count);
 816 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_age_weight, age_weight);
 817 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_age_threshold, age_threshold);
 818
 819 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, seq_file_ra_mul, seq_file_ra_mul);
 820 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_segment_mode, gc_segment_mode);
 821 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_reclaimed_segments, gc_reclaimed_segs);
 822 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_fragment_chunk, max_fragment_chunk);
 823 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_fragment_hole, max_fragment_hole);
 824
 825 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
 826 static struct attribute *f2fs_attrs[] = {
 827         ATTR_LIST(gc_urgent_sleep_time),
 828         ATTR_LIST(gc_min_sleep_time),
 829         ATTR_LIST(gc_max_sleep_time),
 830         ATTR_LIST(gc_no_gc_sleep_time),
 831         ATTR_LIST(gc_idle),
 832         ATTR_LIST(gc_urgent),
 833         ATTR_LIST(reclaim_segments),
 834         ATTR_LIST(main_blkaddr),
 835         ATTR_LIST(max_small_discards),
 836         ATTR_LIST(discard_granularity),
 837         ATTR_LIST(pending_discard),
 838         ATTR_LIST(batched_trim_sections),
 839         ATTR_LIST(ipu_policy),
 840         ATTR_LIST(min_ipu_util),
 841         ATTR_LIST(min_fsync_blocks),
 842         ATTR_LIST(min_seq_blocks),
 843         ATTR_LIST(min_hot_blocks),
 844         ATTR_LIST(min_ssr_sections),
 845         ATTR_LIST(max_victim_search),
 846         ATTR_LIST(migration_granularity),
 847         ATTR_LIST(dir_level),
 848         ATTR_LIST(ram_thresh),
 849         ATTR_LIST(ra_nid_pages),
 850         ATTR_LIST(dirty_nats_ratio),
 851         ATTR_LIST(cp_interval),
 852         ATTR_LIST(idle_interval),
 853         ATTR_LIST(discard_idle_interval),
 854         ATTR_LIST(gc_idle_interval),
 855         ATTR_LIST(umount_discard_timeout),
 856 #ifdef CONFIG_F2FS_IOSTAT
 857         ATTR_LIST(iostat_enable),
 858         ATTR_LIST(iostat_period_ms),
 859 #endif
 860         ATTR_LIST(readdir_ra),
 861         ATTR_LIST(max_io_bytes),
 862         ATTR_LIST(gc_pin_file_thresh),
 863         ATTR_LIST(extension_list),
 864 #ifdef CONFIG_F2FS_FAULT_INJECTION
 865         ATTR_LIST(inject_rate),
 866         ATTR_LIST(inject_type),
 867 #endif
 868         ATTR_LIST(data_io_flag),
 869         ATTR_LIST(node_io_flag),
 870         ATTR_LIST(gc_urgent_high_remaining),
 871         ATTR_LIST(ckpt_thread_ioprio),
 872         ATTR_LIST(dirty_segments),
 873         ATTR_LIST(free_segments),
 874         ATTR_LIST(ovp_segments),
 875         ATTR_LIST(unusable),
 876         ATTR_LIST(lifetime_write_kbytes),
 877         ATTR_LIST(features),
 878         ATTR_LIST(reserved_blocks),
 879         ATTR_LIST(current_reserved_blocks),
 880         ATTR_LIST(encoding),
 881         ATTR_LIST(mounted_time_sec),
 882 #ifdef CONFIG_F2FS_STAT_FS
 883         ATTR_LIST(cp_foreground_calls),
 884         ATTR_LIST(cp_background_calls),
 885         ATTR_LIST(gc_foreground_calls),
 886         ATTR_LIST(gc_background_calls),
 887         ATTR_LIST(moved_blocks_foreground),
 888         ATTR_LIST(moved_blocks_background),
 889         ATTR_LIST(avg_vblocks),
 890 #endif
 891 #ifdef CONFIG_F2FS_FS_COMPRESSION
 892         ATTR_LIST(compr_written_block),
 893         ATTR_LIST(compr_saved_block),
 894         ATTR_LIST(compr_new_inode),
 895 #endif
 896         /* For ATGC */
 897         ATTR_LIST(atgc_candidate_ratio),
 898         ATTR_LIST(atgc_candidate_count),
 899         ATTR_LIST(atgc_age_weight),
 900         ATTR_LIST(atgc_age_threshold),
 901         ATTR_LIST(seq_file_ra_mul),
 902         ATTR_LIST(gc_segment_mode),
 903         ATTR_LIST(gc_reclaimed_segments),
 904         ATTR_LIST(max_fragment_chunk),
 905         ATTR_LIST(max_fragment_hole),
 906         NULL,
 907 };
 908 ATTRIBUTE_GROUPS(f2fs);
 909
 910 static struct attribute *f2fs_feat_attrs[] = {
 911 #ifdef CONFIG_FS_ENCRYPTION
 912         ATTR_LIST(encryption),
 913         ATTR_LIST(test_dummy_encryption_v2),
 914 #ifdef CONFIG_UNICODE
 915         ATTR_LIST(encrypted_casefold),
 916 #endif
 917 #endif /* CONFIG_FS_ENCRYPTION */
 918 #ifdef CONFIG_BLK_DEV_ZONED
 919         ATTR_LIST(block_zoned),
 920 #endif
 921         ATTR_LIST(atomic_write),
 922         ATTR_LIST(extra_attr),
 923         ATTR_LIST(project_quota),
 924         ATTR_LIST(inode_checksum),
 925         ATTR_LIST(flexible_inline_xattr),
 926         ATTR_LIST(quota_ino),
 927         ATTR_LIST(inode_crtime),
 928         ATTR_LIST(lost_found),
 929 #ifdef CONFIG_FS_VERITY
 930         ATTR_LIST(verity),
 931 #endif
 932         ATTR_LIST(sb_checksum),
 933 #ifdef CONFIG_UNICODE
 934         ATTR_LIST(casefold),
 935 #endif
 936         ATTR_LIST(readonly),
 937 #ifdef CONFIG_F2FS_FS_COMPRESSION
 938         ATTR_LIST(compression),
 939 #endif
 940         ATTR_LIST(pin_file),
 941         NULL,
 942 };
 943 ATTRIBUTE_GROUPS(f2fs_feat);
 944
 945 F2FS_GENERAL_RO_ATTR(sb_status);
 946 static struct attribute *f2fs_stat_attrs[] = {
 947         ATTR_LIST(sb_status),
 948         NULL,
 949 };
 950 ATTRIBUTE_GROUPS(f2fs_stat);
 951
 952 F2FS_SB_FEATURE_RO_ATTR(encryption, ENCRYPT);
 953 F2FS_SB_FEATURE_RO_ATTR(block_zoned, BLKZONED);
 954 F2FS_SB_FEATURE_RO_ATTR(extra_attr, EXTRA_ATTR);
 955 F2FS_SB_FEATURE_RO_ATTR(project_quota, PRJQUOTA);
 956 F2FS_SB_FEATURE_RO_ATTR(inode_checksum, INODE_CHKSUM);
 957 F2FS_SB_FEATURE_RO_ATTR(flexible_inline_xattr, FLEXIBLE_INLINE_XATTR);
 958 F2FS_SB_FEATURE_RO_ATTR(quota_ino, QUOTA_INO);
 959 F2FS_SB_FEATURE_RO_ATTR(inode_crtime, INODE_CRTIME);
 960 F2FS_SB_FEATURE_RO_ATTR(lost_found, LOST_FOUND);
 961 F2FS_SB_FEATURE_RO_ATTR(verity, VERITY);
 962 F2FS_SB_FEATURE_RO_ATTR(sb_checksum, SB_CHKSUM);
 963 F2FS_SB_FEATURE_RO_ATTR(casefold, CASEFOLD);
 964 F2FS_SB_FEATURE_RO_ATTR(compression, COMPRESSION);
 965 F2FS_SB_FEATURE_RO_ATTR(readonly, RO);
 966
 967 static struct attribute *f2fs_sb_feat_attrs[] = {
 968         ATTR_LIST(sb_encryption),
 969         ATTR_LIST(sb_block_zoned),
 970         ATTR_LIST(sb_extra_attr),
 971         ATTR_LIST(sb_project_quota),
 972         ATTR_LIST(sb_inode_checksum),
 973         ATTR_LIST(sb_flexible_inline_xattr),
 974         ATTR_LIST(sb_quota_ino),
 975         ATTR_LIST(sb_inode_crtime),
 976         ATTR_LIST(sb_lost_found),
 977         ATTR_LIST(sb_verity),
 978         ATTR_LIST(sb_sb_checksum),
 979         ATTR_LIST(sb_casefold),
 980         ATTR_LIST(sb_compression),
 981         ATTR_LIST(sb_readonly),
 982         NULL,
 983 };
 984 ATTRIBUTE_GROUPS(f2fs_sb_feat);
 985
 986 static const struct sysfs_ops f2fs_attr_ops = {
 987         .show   = f2fs_attr_show,
 988         .store  = f2fs_attr_store,
 989 };
 990
 991 static struct kobj_type f2fs_sb_ktype = {
 992         .default_groups = f2fs_groups,
 993         .sysfs_ops      = &f2fs_attr_ops,
 994         .release        = f2fs_sb_release,
 995 };
 996
 997 static struct kobj_type f2fs_ktype = {
 998         .sysfs_ops      = &f2fs_attr_ops,
 999 };
1000
1001 static struct kset f2fs_kset = {
1002         .kobj   = {.ktype = &f2fs_ktype},
1003 };
1004
1005 static struct kobj_type f2fs_feat_ktype = {
1006         .default_groups = f2fs_feat_groups,
1007         .sysfs_ops      = &f2fs_attr_ops,
1008 };
1009
1010 static struct kobject f2fs_feat = {
1011         .kset   = &f2fs_kset,
1012 };
1013
1014 static ssize_t f2fs_stat_attr_show(struct kobject *kobj,
1015                                 struct attribute *attr, char *buf)
1016 {
1017         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1018                                                                 s_stat_kobj);
1019         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1020
1021         return a->show ? a->show(a, sbi, buf) : 0;
1022 }
1023
1024 static ssize_t f2fs_stat_attr_store(struct kobject *kobj, struct attribute *attr,
1025                                                 const char *buf, size_t len)
1026 {
1027         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1028                                                                 s_stat_kobj);
1029         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1030
1031         return a->store ? a->store(a, sbi, buf, len) : 0;
1032 }
1033
1034 static void f2fs_stat_kobj_release(struct kobject *kobj)
1035 {
1036         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1037                                                                 s_stat_kobj);
1038         complete(&sbi->s_stat_kobj_unregister);
1039 }
1040
1041 static const struct sysfs_ops f2fs_stat_attr_ops = {
1042         .show   = f2fs_stat_attr_show,
1043         .store  = f2fs_stat_attr_store,
1044 };
1045
1046 static struct kobj_type f2fs_stat_ktype = {
1047         .default_groups = f2fs_stat_groups,
1048         .sysfs_ops      = &f2fs_stat_attr_ops,
1049         .release        = f2fs_stat_kobj_release,
1050 };
1051
1052 static ssize_t f2fs_sb_feat_attr_show(struct kobject *kobj,
1053                                 struct attribute *attr, char *buf)
1054 {
1055         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1056                                                         s_feature_list_kobj);
1057         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1058
1059         return a->show ? a->show(a, sbi, buf) : 0;
1060 }
1061
1062 static void f2fs_feature_list_kobj_release(struct kobject *kobj)
1063 {
1064         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1065                                                         s_feature_list_kobj);
1066         complete(&sbi->s_feature_list_kobj_unregister);
1067 }
1068
1069 static const struct sysfs_ops f2fs_feature_list_attr_ops = {
1070         .show   = f2fs_sb_feat_attr_show,
1071 };
1072
1073 static struct kobj_type f2fs_feature_list_ktype = {
1074         .default_groups = f2fs_sb_feat_groups,
1075         .sysfs_ops      = &f2fs_feature_list_attr_ops,
1076         .release        = f2fs_feature_list_kobj_release,
1077 };
1078
1079 static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
1080                                                 void *offset)
1081 {
1082         struct super_block *sb = seq->private;
1083         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1084         unsigned int total_segs =
1085                         le32_to_cpu(sbi->raw_super->segment_count_main);
1086         int i;
1087
1088         seq_puts(seq, "format: segment_type|valid_blocks\n"
1089                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1090
1091         for (i = 0; i < total_segs; i++) {
1092                 struct seg_entry *se = get_seg_entry(sbi, i);
1093
1094                 if ((i % 10) == 0)
1095                         seq_printf(seq, "%-10d", i);
1096                 seq_printf(seq, "%d|%-3u", se->type, se->valid_blocks);
1097                 if ((i % 10) == 9 || i == (total_segs - 1))
1098                         seq_putc(seq, '\n');
1099                 else
1100                         seq_putc(seq, ' ');
1101         }
1102
1103         return 0;
1104 }
1105
1106 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
1107                                                 void *offset)
1108 {
1109         struct super_block *sb = seq->private;
1110         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1111         unsigned int total_segs =
1112                         le32_to_cpu(sbi->raw_super->segment_count_main);
1113         int i, j;
1114
1115         seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
1116                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1117
1118         for (i = 0; i < total_segs; i++) {
1119                 struct seg_entry *se = get_seg_entry(sbi, i);
1120
1121                 seq_printf(seq, "%-10d", i);
1122                 seq_printf(seq, "%d|%-3u|", se->type, se->valid_blocks);
1123                 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
1124                         seq_printf(seq, " %.2x", se->cur_valid_map[j]);
1125                 seq_putc(seq, '\n');
1126         }
1127         return 0;
1128 }
1129
1130 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
1131                                                 void *offset)
1132 {
1133         struct super_block *sb = seq->private;
1134         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1135         struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1136         int i;
1137
1138         seq_puts(seq, "format: victim_secmap bitmaps\n");
1139
1140         for (i = 0; i < MAIN_SECS(sbi); i++) {
1141                 if ((i % 10) == 0)
1142                         seq_printf(seq, "%-10d", i);
1143                 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
1144                 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
1145                         seq_putc(seq, '\n');
1146                 else
1147                         seq_putc(seq, ' ');
1148         }
1149         return 0;
1150 }
1151
1152 int __init f2fs_init_sysfs(void)
1153 {
1154         int ret;
1155
1156         kobject_set_name(&f2fs_kset.kobj, "f2fs");
1157         f2fs_kset.kobj.parent = fs_kobj;
1158         ret = kset_register(&f2fs_kset);
1159         if (ret)
1160                 return ret;
1161
1162         ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
1163                                    NULL, "features");
1164         if (ret) {
1165                 kobject_put(&f2fs_feat);
1166                 kset_unregister(&f2fs_kset);
1167         } else {
1168                 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
1169         }
1170         return ret;
1171 }
1172
1173 void f2fs_exit_sysfs(void)
1174 {
1175         kobject_put(&f2fs_feat);
1176         kset_unregister(&f2fs_kset);
1177         remove_proc_entry("fs/f2fs", NULL);
1178         f2fs_proc_root = NULL;
1179 }
1180
1181 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
1182 {
1183         struct super_block *sb = sbi->sb;
1184         int err;
1185
1186         sbi->s_kobj.kset = &f2fs_kset;
1187         init_completion(&sbi->s_kobj_unregister);
1188         err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
1189                                 "%s", sb->s_id);
1190         if (err)
1191                 goto put_sb_kobj;
1192
1193         sbi->s_stat_kobj.kset = &f2fs_kset;
1194         init_completion(&sbi->s_stat_kobj_unregister);
1195         err = kobject_init_and_add(&sbi->s_stat_kobj, &f2fs_stat_ktype,
1196                                                 &sbi->s_kobj, "stat");
1197         if (err)
1198                 goto put_stat_kobj;
1199
1200         sbi->s_feature_list_kobj.kset = &f2fs_kset;
1201         init_completion(&sbi->s_feature_list_kobj_unregister);
1202         err = kobject_init_and_add(&sbi->s_feature_list_kobj,
1203                                         &f2fs_feature_list_ktype,
1204                                         &sbi->s_kobj, "feature_list");
1205         if (err)
1206                 goto put_feature_list_kobj;
1207
1208         if (f2fs_proc_root)
1209                 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
1210
1211         if (sbi->s_proc) {
1212                 proc_create_single_data("segment_info", 0444, sbi->s_proc,
1213                                 segment_info_seq_show, sb);
1214                 proc_create_single_data("segment_bits", 0444, sbi->s_proc,
1215                                 segment_bits_seq_show, sb);
1216 #ifdef CONFIG_F2FS_IOSTAT
1217                 proc_create_single_data("iostat_info", 0444, sbi->s_proc,
1218                                 iostat_info_seq_show, sb);
1219 #endif
1220                 proc_create_single_data("victim_bits", 0444, sbi->s_proc,
1221                                 victim_bits_seq_show, sb);
1222         }
1223         return 0;
1224 put_feature_list_kobj:
1225         kobject_put(&sbi->s_feature_list_kobj);
1226         wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1227 put_stat_kobj:
1228         kobject_put(&sbi->s_stat_kobj);
1229         wait_for_completion(&sbi->s_stat_kobj_unregister);
1230 put_sb_kobj:
1231         kobject_put(&sbi->s_kobj);
1232         wait_for_completion(&sbi->s_kobj_unregister);
1233         return err;
1234 }
1235
1236 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
1237 {
1238         if (sbi->s_proc) {
1239 #ifdef CONFIG_F2FS_IOSTAT
1240                 remove_proc_entry("iostat_info", sbi->s_proc);
1241 #endif
1242                 remove_proc_entry("segment_info", sbi->s_proc);
1243                 remove_proc_entry("segment_bits", sbi->s_proc);
1244                 remove_proc_entry("victim_bits", sbi->s_proc);
1245                 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
1246         }
1247
1248         kobject_del(&sbi->s_stat_kobj);
1249         kobject_put(&sbi->s_stat_kobj);
1250         wait_for_completion(&sbi->s_stat_kobj_unregister);
1251         kobject_del(&sbi->s_feature_list_kobj);
1252         kobject_put(&sbi->s_feature_list_kobj);
1253         wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1254
1255         kobject_del(&sbi->s_kobj);
1256         kobject_put(&sbi->s_kobj);
1257         wait_for_completion(&sbi->s_kobj_unregister);
1258 }