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/compiler.h>
  13 #include <linux/proc_fs.h>
  14 #include <linux/f2fs_fs.h>
  15 #include <linux/seq_file.h>
  16
  17 #include "f2fs.h"
  18 #include "segment.h"
  19 #include "gc.h"
  20
  21 static struct proc_dir_entry *f2fs_proc_root;
  22
  23 /* Sysfs support for f2fs */
  24 enum {
  25         GC_THREAD,      /* struct f2fs_gc_thread */
  26         SM_INFO,        /* struct f2fs_sm_info */
  27         DCC_INFO,       /* struct discard_cmd_control */
  28         NM_INFO,        /* struct f2fs_nm_info */
  29         F2FS_SBI,       /* struct f2fs_sb_info */
  30 #ifdef CONFIG_F2FS_FAULT_INJECTION
  31         FAULT_INFO_RATE,        /* struct f2fs_fault_info */
  32         FAULT_INFO_TYPE,        /* struct f2fs_fault_info */
  33 #endif
  34         RESERVED_BLOCKS,        /* struct f2fs_sb_info */
  35 };
  36
  37 struct f2fs_attr {
  38         struct attribute attr;
  39         ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
  40         ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
  41                          const char *, size_t);
  42         int struct_type;
  43         int offset;
  44         int id;
  45 };
  46
  47 static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
  48 {
  49         if (struct_type == GC_THREAD)
  50                 return (unsigned char *)sbi->gc_thread;
  51         else if (struct_type == SM_INFO)
  52                 return (unsigned char *)SM_I(sbi);
  53         else if (struct_type == DCC_INFO)
  54                 return (unsigned char *)SM_I(sbi)->dcc_info;
  55         else if (struct_type == NM_INFO)
  56                 return (unsigned char *)NM_I(sbi);
  57         else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS)
  58                 return (unsigned char *)sbi;
  59 #ifdef CONFIG_F2FS_FAULT_INJECTION
  60         else if (struct_type == FAULT_INFO_RATE ||
  61                                         struct_type == FAULT_INFO_TYPE)
  62                 return (unsigned char *)&F2FS_OPTION(sbi).fault_info;
  63 #endif
  64         return NULL;
  65 }
  66
  67 static ssize_t dirty_segments_show(struct f2fs_attr *a,
  68                 struct f2fs_sb_info *sbi, char *buf)
  69 {
  70         return snprintf(buf, PAGE_SIZE, "%llu\n",
  71                 (unsigned long long)(dirty_segments(sbi)));
  72 }
  73
  74 static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
  75                 struct f2fs_sb_info *sbi, char *buf)
  76 {
  77         struct super_block *sb = sbi->sb;
  78
  79         if (!sb->s_bdev->bd_part)
  80                 return snprintf(buf, PAGE_SIZE, "0\n");
  81
  82         return snprintf(buf, PAGE_SIZE, "%llu\n",
  83                 (unsigned long long)(sbi->kbytes_written +
  84                         BD_PART_WRITTEN(sbi)));
  85 }
  86
  87 static ssize_t features_show(struct f2fs_attr *a,
  88                 struct f2fs_sb_info *sbi, char *buf)
  89 {
  90         struct super_block *sb = sbi->sb;
  91         int len = 0;
  92
  93         if (!sb->s_bdev->bd_part)
  94                 return snprintf(buf, PAGE_SIZE, "0\n");
  95
  96         if (f2fs_sb_has_encrypt(sb))
  97                 len += snprintf(buf, PAGE_SIZE - len, "%s",
  98                                                 "encryption");
  99         if (f2fs_sb_has_blkzoned(sb))
 100                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 101                                 len ? ", " : "", "blkzoned");
 102         if (f2fs_sb_has_extra_attr(sb))
 103                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 104                                 len ? ", " : "", "extra_attr");
 105         if (f2fs_sb_has_project_quota(sb))
 106                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 107                                 len ? ", " : "", "projquota");
 108         if (f2fs_sb_has_inode_chksum(sb))
 109                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 110                                 len ? ", " : "", "inode_checksum");
 111         if (f2fs_sb_has_flexible_inline_xattr(sb))
 112                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 113                                 len ? ", " : "", "flexible_inline_xattr");
 114         if (f2fs_sb_has_quota_ino(sb))
 115                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 116                                 len ? ", " : "", "quota_ino");
 117         if (f2fs_sb_has_inode_crtime(sb))
 118                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 119                                 len ? ", " : "", "inode_crtime");
 120         if (f2fs_sb_has_lost_found(sb))
 121                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 122                                 len ? ", " : "", "lost_found");
 123         len += snprintf(buf + len, PAGE_SIZE - len, "\n");
 124         return len;
 125 }
 126
 127 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
 128                                         struct f2fs_sb_info *sbi, char *buf)
 129 {
 130         return snprintf(buf, PAGE_SIZE, "%u\n", sbi->current_reserved_blocks);
 131 }
 132
 133 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
 134                         struct f2fs_sb_info *sbi, char *buf)
 135 {
 136         unsigned char *ptr = NULL;
 137         unsigned int *ui;
 138
 139         ptr = __struct_ptr(sbi, a->struct_type);
 140         if (!ptr)
 141                 return -EINVAL;
 142
 143         if (!strcmp(a->attr.name, "extension_list")) {
 144                 __u8 (*extlist)[F2FS_EXTENSION_LEN] =
 145                                         sbi->raw_super->extension_list;
 146                 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
 147                 int hot_count = sbi->raw_super->hot_ext_count;
 148                 int len = 0, i;
 149
 150                 len += snprintf(buf + len, PAGE_SIZE - len,
 151                                                 "cold file extension:\n");
 152                 for (i = 0; i < cold_count; i++)
 153                         len += snprintf(buf + len, PAGE_SIZE - len, "%s\n",
 154                                                                 extlist[i]);
 155
 156                 len += snprintf(buf + len, PAGE_SIZE - len,
 157                                                 "hot file extension:\n");
 158                 for (i = cold_count; i < cold_count + hot_count; i++)
 159                         len += snprintf(buf + len, PAGE_SIZE - len, "%s\n",
 160                                                                 extlist[i]);
 161                 return len;
 162         }
 163
 164         ui = (unsigned int *)(ptr + a->offset);
 165
 166         return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
 167 }
 168
 169 static ssize_t __sbi_store(struct f2fs_attr *a,
 170                         struct f2fs_sb_info *sbi,
 171                         const char *buf, size_t count)
 172 {
 173         unsigned char *ptr;
 174         unsigned long t;
 175         unsigned int *ui;
 176         ssize_t ret;
 177
 178         ptr = __struct_ptr(sbi, a->struct_type);
 179         if (!ptr)
 180                 return -EINVAL;
 181
 182         if (!strcmp(a->attr.name, "extension_list")) {
 183                 const char *name = strim((char *)buf);
 184                 bool set = true, hot;
 185
 186                 if (!strncmp(name, "[h]", 3))
 187                         hot = true;
 188                 else if (!strncmp(name, "[c]", 3))
 189                         hot = false;
 190                 else
 191                         return -EINVAL;
 192
 193                 name += 3;
 194
 195                 if (*name == '!') {
 196                         name++;
 197                         set = false;
 198                 }
 199
 200                 if (strlen(name) >= F2FS_EXTENSION_LEN)
 201                         return -EINVAL;
 202
 203                 down_write(&sbi->sb_lock);
 204
 205                 ret = f2fs_update_extension_list(sbi, name, hot, set);
 206                 if (ret)
 207                         goto out;
 208
 209                 ret = f2fs_commit_super(sbi, false);
 210                 if (ret)
 211                         f2fs_update_extension_list(sbi, name, hot, !set);
 212 out:
 213                 up_write(&sbi->sb_lock);
 214                 return ret ? ret : count;
 215         }
 216
 217         ui = (unsigned int *)(ptr + a->offset);
 218
 219         ret = kstrtoul(skip_spaces(buf), 0, &t);
 220         if (ret < 0)
 221                 return ret;
 222 #ifdef CONFIG_F2FS_FAULT_INJECTION
 223         if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
 224                 return -EINVAL;
 225 #endif
 226         if (a->struct_type == RESERVED_BLOCKS) {
 227                 spin_lock(&sbi->stat_lock);
 228                 if (t > (unsigned long)(sbi->user_block_count -
 229                                 F2FS_OPTION(sbi).root_reserved_blocks)) {
 230                         spin_unlock(&sbi->stat_lock);
 231                         return -EINVAL;
 232                 }
 233                 *ui = t;
 234                 sbi->current_reserved_blocks = min(sbi->reserved_blocks,
 235                                 sbi->user_block_count - valid_user_blocks(sbi));
 236                 spin_unlock(&sbi->stat_lock);
 237                 return count;
 238         }
 239
 240         if (!strcmp(a->attr.name, "discard_granularity")) {
 241                 if (t == 0 || t > MAX_PLIST_NUM)
 242                         return -EINVAL;
 243                 if (t == *ui)
 244                         return count;
 245                 *ui = t;
 246                 return count;
 247         }
 248
 249         if (!strcmp(a->attr.name, "trim_sections"))
 250                 return -EINVAL;
 251
 252         if (!strcmp(a->attr.name, "gc_urgent")) {
 253                 if (t >= 1) {
 254                         sbi->gc_mode = GC_URGENT;
 255                         if (sbi->gc_thread) {
 256                                 sbi->gc_thread->gc_wake = 1;
 257                                 wake_up_interruptible_all(
 258                                         &sbi->gc_thread->gc_wait_queue_head);
 259                                 wake_up_discard_thread(sbi, true);
 260                         }
 261                 } else {
 262                         sbi->gc_mode = GC_NORMAL;
 263                 }
 264                 return count;
 265         }
 266         if (!strcmp(a->attr.name, "gc_idle")) {
 267                 if (t == GC_IDLE_CB)
 268                         sbi->gc_mode = GC_IDLE_CB;
 269                 else if (t == GC_IDLE_GREEDY)
 270                         sbi->gc_mode = GC_IDLE_GREEDY;
 271                 else
 272                         sbi->gc_mode = GC_NORMAL;
 273                 return count;
 274         }
 275
 276
 277         if (!strcmp(a->attr.name, "iostat_enable")) {
 278                 sbi->iostat_enable = !!t;
 279                 if (!sbi->iostat_enable)
 280                         f2fs_reset_iostat(sbi);
 281                 return count;
 282         }
 283
 284         *ui = (unsigned int)t;
 285
 286         return count;
 287 }
 288
 289 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
 290                         struct f2fs_sb_info *sbi,
 291                         const char *buf, size_t count)
 292 {
 293         ssize_t ret;
 294         bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
 295                                         a->struct_type == GC_THREAD);
 296
 297         if (gc_entry) {
 298                 if (!down_read_trylock(&sbi->sb->s_umount))
 299                         return -EAGAIN;
 300         }
 301         ret = __sbi_store(a, sbi, buf, count);
 302         if (gc_entry)
 303                 up_read(&sbi->sb->s_umount);
 304
 305         return ret;
 306 }
 307
 308 static ssize_t f2fs_attr_show(struct kobject *kobj,
 309                                 struct attribute *attr, char *buf)
 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->show ? a->show(a, sbi, buf) : 0;
 316 }
 317
 318 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
 319                                                 const char *buf, size_t len)
 320 {
 321         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 322                                                                         s_kobj);
 323         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 324
 325         return a->store ? a->store(a, sbi, buf, len) : 0;
 326 }
 327
 328 static void f2fs_sb_release(struct kobject *kobj)
 329 {
 330         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 331                                                                 s_kobj);
 332         complete(&sbi->s_kobj_unregister);
 333 }
 334
 335 enum feat_id {
 336         FEAT_CRYPTO = 0,
 337         FEAT_BLKZONED,
 338         FEAT_ATOMIC_WRITE,
 339         FEAT_EXTRA_ATTR,
 340         FEAT_PROJECT_QUOTA,
 341         FEAT_INODE_CHECKSUM,
 342         FEAT_FLEXIBLE_INLINE_XATTR,
 343         FEAT_QUOTA_INO,
 344         FEAT_INODE_CRTIME,
 345         FEAT_LOST_FOUND,
 346 };
 347
 348 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
 349                 struct f2fs_sb_info *sbi, char *buf)
 350 {
 351         switch (a->id) {
 352         case FEAT_CRYPTO:
 353         case FEAT_BLKZONED:
 354         case FEAT_ATOMIC_WRITE:
 355         case FEAT_EXTRA_ATTR:
 356         case FEAT_PROJECT_QUOTA:
 357         case FEAT_INODE_CHECKSUM:
 358         case FEAT_FLEXIBLE_INLINE_XATTR:
 359         case FEAT_QUOTA_INO:
 360         case FEAT_INODE_CRTIME:
 361         case FEAT_LOST_FOUND:
 362                 return snprintf(buf, PAGE_SIZE, "supported\n");
 363         }
 364         return 0;
 365 }
 366
 367 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
 368 static struct f2fs_attr f2fs_attr_##_name = {                   \
 369         .attr = {.name = __stringify(_name), .mode = _mode },   \
 370         .show   = _show,                                        \
 371         .store  = _store,                                       \
 372         .struct_type = _struct_type,                            \
 373         .offset = _offset                                       \
 374 }
 375
 376 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname)    \
 377         F2FS_ATTR_OFFSET(struct_type, name, 0644,               \
 378                 f2fs_sbi_show, f2fs_sbi_store,                  \
 379                 offsetof(struct struct_name, elname))
 380
 381 #define F2FS_GENERAL_RO_ATTR(name) \
 382 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
 383
 384 #define F2FS_FEATURE_RO_ATTR(_name, _id)                        \
 385 static struct f2fs_attr f2fs_attr_##_name = {                   \
 386         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 387         .show   = f2fs_feature_show,                            \
 388         .id     = _id,                                          \
 389 }
 390
 391 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
 392                                                         urgent_sleep_time);
 393 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
 394 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
 395 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
 396 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle, gc_mode);
 397 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent, gc_mode);
 398 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
 399 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
 400 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
 401 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
 402 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
 403 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
 404 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
 405 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
 406 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_seq_blocks, min_seq_blocks);
 407 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
 408 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections);
 409 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
 410 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
 411 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
 412 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
 413 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
 414 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
 415 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
 416 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
 417 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
 418 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
 419 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
 420 #ifdef CONFIG_F2FS_FAULT_INJECTION
 421 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
 422 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
 423 #endif
 424 F2FS_GENERAL_RO_ATTR(dirty_segments);
 425 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
 426 F2FS_GENERAL_RO_ATTR(features);
 427 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
 428
 429 #ifdef CONFIG_F2FS_FS_ENCRYPTION
 430 F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO);
 431 #endif
 432 #ifdef CONFIG_BLK_DEV_ZONED
 433 F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED);
 434 #endif
 435 F2FS_FEATURE_RO_ATTR(atomic_write, FEAT_ATOMIC_WRITE);
 436 F2FS_FEATURE_RO_ATTR(extra_attr, FEAT_EXTRA_ATTR);
 437 F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA);
 438 F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM);
 439 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr, FEAT_FLEXIBLE_INLINE_XATTR);
 440 F2FS_FEATURE_RO_ATTR(quota_ino, FEAT_QUOTA_INO);
 441 F2FS_FEATURE_RO_ATTR(inode_crtime, FEAT_INODE_CRTIME);
 442 F2FS_FEATURE_RO_ATTR(lost_found, FEAT_LOST_FOUND);
 443
 444 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
 445 static struct attribute *f2fs_attrs[] = {
 446         ATTR_LIST(gc_urgent_sleep_time),
 447         ATTR_LIST(gc_min_sleep_time),
 448         ATTR_LIST(gc_max_sleep_time),
 449         ATTR_LIST(gc_no_gc_sleep_time),
 450         ATTR_LIST(gc_idle),
 451         ATTR_LIST(gc_urgent),
 452         ATTR_LIST(reclaim_segments),
 453         ATTR_LIST(max_small_discards),
 454         ATTR_LIST(discard_granularity),
 455         ATTR_LIST(batched_trim_sections),
 456         ATTR_LIST(ipu_policy),
 457         ATTR_LIST(min_ipu_util),
 458         ATTR_LIST(min_fsync_blocks),
 459         ATTR_LIST(min_seq_blocks),
 460         ATTR_LIST(min_hot_blocks),
 461         ATTR_LIST(min_ssr_sections),
 462         ATTR_LIST(max_victim_search),
 463         ATTR_LIST(dir_level),
 464         ATTR_LIST(ram_thresh),
 465         ATTR_LIST(ra_nid_pages),
 466         ATTR_LIST(dirty_nats_ratio),
 467         ATTR_LIST(cp_interval),
 468         ATTR_LIST(idle_interval),
 469         ATTR_LIST(iostat_enable),
 470         ATTR_LIST(readdir_ra),
 471         ATTR_LIST(gc_pin_file_thresh),
 472         ATTR_LIST(extension_list),
 473 #ifdef CONFIG_F2FS_FAULT_INJECTION
 474         ATTR_LIST(inject_rate),
 475         ATTR_LIST(inject_type),
 476 #endif
 477         ATTR_LIST(dirty_segments),
 478         ATTR_LIST(lifetime_write_kbytes),
 479         ATTR_LIST(features),
 480         ATTR_LIST(reserved_blocks),
 481         ATTR_LIST(current_reserved_blocks),
 482         NULL,
 483 };
 484
 485 static struct attribute *f2fs_feat_attrs[] = {
 486 #ifdef CONFIG_F2FS_FS_ENCRYPTION
 487         ATTR_LIST(encryption),
 488 #endif
 489 #ifdef CONFIG_BLK_DEV_ZONED
 490         ATTR_LIST(block_zoned),
 491 #endif
 492         ATTR_LIST(atomic_write),
 493         ATTR_LIST(extra_attr),
 494         ATTR_LIST(project_quota),
 495         ATTR_LIST(inode_checksum),
 496         ATTR_LIST(flexible_inline_xattr),
 497         ATTR_LIST(quota_ino),
 498         ATTR_LIST(inode_crtime),
 499         ATTR_LIST(lost_found),
 500         NULL,
 501 };
 502
 503 static const struct sysfs_ops f2fs_attr_ops = {
 504         .show   = f2fs_attr_show,
 505         .store  = f2fs_attr_store,
 506 };
 507
 508 static struct kobj_type f2fs_sb_ktype = {
 509         .default_attrs  = f2fs_attrs,
 510         .sysfs_ops      = &f2fs_attr_ops,
 511         .release        = f2fs_sb_release,
 512 };
 513
 514 static struct kobj_type f2fs_ktype = {
 515         .sysfs_ops      = &f2fs_attr_ops,
 516 };
 517
 518 static struct kset f2fs_kset = {
 519         .kobj   = {.ktype = &f2fs_ktype},
 520 };
 521
 522 static struct kobj_type f2fs_feat_ktype = {
 523         .default_attrs  = f2fs_feat_attrs,
 524         .sysfs_ops      = &f2fs_attr_ops,
 525 };
 526
 527 static struct kobject f2fs_feat = {
 528         .kset   = &f2fs_kset,
 529 };
 530
 531 static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
 532                                                 void *offset)
 533 {
 534         struct super_block *sb = seq->private;
 535         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 536         unsigned int total_segs =
 537                         le32_to_cpu(sbi->raw_super->segment_count_main);
 538         int i;
 539
 540         seq_puts(seq, "format: segment_type|valid_blocks\n"
 541                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
 542
 543         for (i = 0; i < total_segs; i++) {
 544                 struct seg_entry *se = get_seg_entry(sbi, i);
 545
 546                 if ((i % 10) == 0)
 547                         seq_printf(seq, "%-10d", i);
 548                 seq_printf(seq, "%d|%-3u", se->type,
 549                                         get_valid_blocks(sbi, i, false));
 550                 if ((i % 10) == 9 || i == (total_segs - 1))
 551                         seq_putc(seq, '\n');
 552                 else
 553                         seq_putc(seq, ' ');
 554         }
 555
 556         return 0;
 557 }
 558
 559 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
 560                                                 void *offset)
 561 {
 562         struct super_block *sb = seq->private;
 563         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 564         unsigned int total_segs =
 565                         le32_to_cpu(sbi->raw_super->segment_count_main);
 566         int i, j;
 567
 568         seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
 569                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
 570
 571         for (i = 0; i < total_segs; i++) {
 572                 struct seg_entry *se = get_seg_entry(sbi, i);
 573
 574                 seq_printf(seq, "%-10d", i);
 575                 seq_printf(seq, "%d|%-3u|", se->type,
 576                                         get_valid_blocks(sbi, i, false));
 577                 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
 578                         seq_printf(seq, " %.2x", se->cur_valid_map[j]);
 579                 seq_putc(seq, '\n');
 580         }
 581         return 0;
 582 }
 583
 584 static int __maybe_unused iostat_info_seq_show(struct seq_file *seq,
 585                                                void *offset)
 586 {
 587         struct super_block *sb = seq->private;
 588         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 589         time64_t now = ktime_get_real_seconds();
 590
 591         if (!sbi->iostat_enable)
 592                 return 0;
 593
 594         seq_printf(seq, "time:          %-16llu\n", now);
 595
 596         /* print app IOs */
 597         seq_printf(seq, "app buffered:  %-16llu\n",
 598                                 sbi->write_iostat[APP_BUFFERED_IO]);
 599         seq_printf(seq, "app direct:    %-16llu\n",
 600                                 sbi->write_iostat[APP_DIRECT_IO]);
 601         seq_printf(seq, "app mapped:    %-16llu\n",
 602                                 sbi->write_iostat[APP_MAPPED_IO]);
 603
 604         /* print fs IOs */
 605         seq_printf(seq, "fs data:       %-16llu\n",
 606                                 sbi->write_iostat[FS_DATA_IO]);
 607         seq_printf(seq, "fs node:       %-16llu\n",
 608                                 sbi->write_iostat[FS_NODE_IO]);
 609         seq_printf(seq, "fs meta:       %-16llu\n",
 610                                 sbi->write_iostat[FS_META_IO]);
 611         seq_printf(seq, "fs gc data:    %-16llu\n",
 612                                 sbi->write_iostat[FS_GC_DATA_IO]);
 613         seq_printf(seq, "fs gc node:    %-16llu\n",
 614                                 sbi->write_iostat[FS_GC_NODE_IO]);
 615         seq_printf(seq, "fs cp data:    %-16llu\n",
 616                                 sbi->write_iostat[FS_CP_DATA_IO]);
 617         seq_printf(seq, "fs cp node:    %-16llu\n",
 618                                 sbi->write_iostat[FS_CP_NODE_IO]);
 619         seq_printf(seq, "fs cp meta:    %-16llu\n",
 620                                 sbi->write_iostat[FS_CP_META_IO]);
 621         seq_printf(seq, "fs discard:    %-16llu\n",
 622                                 sbi->write_iostat[FS_DISCARD]);
 623
 624         return 0;
 625 }
 626
 627 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
 628                                                 void *offset)
 629 {
 630         struct super_block *sb = seq->private;
 631         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 632         struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
 633         int i;
 634
 635         seq_puts(seq, "format: victim_secmap bitmaps\n");
 636
 637         for (i = 0; i < MAIN_SECS(sbi); i++) {
 638                 if ((i % 10) == 0)
 639                         seq_printf(seq, "%-10d", i);
 640                 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
 641                 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
 642                         seq_putc(seq, '\n');
 643                 else
 644                         seq_putc(seq, ' ');
 645         }
 646         return 0;
 647 }
 648
 649 int __init f2fs_init_sysfs(void)
 650 {
 651         int ret;
 652
 653         kobject_set_name(&f2fs_kset.kobj, "f2fs");
 654         f2fs_kset.kobj.parent = fs_kobj;
 655         ret = kset_register(&f2fs_kset);
 656         if (ret)
 657                 return ret;
 658
 659         ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
 660                                    NULL, "features");
 661         if (ret) {
 662                 kobject_put(&f2fs_feat);
 663                 kset_unregister(&f2fs_kset);
 664         } else {
 665                 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
 666         }
 667         return ret;
 668 }
 669
 670 void f2fs_exit_sysfs(void)
 671 {
 672         kobject_put(&f2fs_feat);
 673         kset_unregister(&f2fs_kset);
 674         remove_proc_entry("fs/f2fs", NULL);
 675         f2fs_proc_root = NULL;
 676 }
 677
 678 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
 679 {
 680         struct super_block *sb = sbi->sb;
 681         int err;
 682
 683         sbi->s_kobj.kset = &f2fs_kset;
 684         init_completion(&sbi->s_kobj_unregister);
 685         err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
 686                                 "%s", sb->s_id);
 687         if (err) {
 688                 kobject_put(&sbi->s_kobj);
 689                 wait_for_completion(&sbi->s_kobj_unregister);
 690                 return err;
 691         }
 692
 693         if (f2fs_proc_root)
 694                 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
 695
 696         if (sbi->s_proc) {
 697                 proc_create_single_data("segment_info", S_IRUGO, sbi->s_proc,
 698                                 segment_info_seq_show, sb);
 699                 proc_create_single_data("segment_bits", S_IRUGO, sbi->s_proc,
 700                                 segment_bits_seq_show, sb);
 701                 proc_create_single_data("iostat_info", S_IRUGO, sbi->s_proc,
 702                                 iostat_info_seq_show, sb);
 703                 proc_create_single_data("victim_bits", S_IRUGO, sbi->s_proc,
 704                                 victim_bits_seq_show, sb);
 705         }
 706         return 0;
 707 }
 708
 709 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
 710 {
 711         if (sbi->s_proc) {
 712                 remove_proc_entry("iostat_info", sbi->s_proc);
 713                 remove_proc_entry("segment_info", sbi->s_proc);
 714                 remove_proc_entry("segment_bits", sbi->s_proc);
 715                 remove_proc_entry("victim_bits", sbi->s_proc);
 716                 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
 717         }
 718         kobject_del(&sbi->s_kobj);
 719         kobject_put(&sbi->s_kobj);
 720         wait_for_completion(&sbi->s_kobj_unregister);
 721 }