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[people/arne_f/kernel.git] / fs / f2fs / sysfs.c
1 /*
2 * f2fs sysfs interface
3 *
4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
6 * Copyright (c) 2017 Chao Yu <chao@kernel.org>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12 #include <linux/proc_fs.h>
13 #include <linux/f2fs_fs.h>
14 #include <linux/seq_file.h>
15
16 #include "f2fs.h"
17 #include "segment.h"
18 #include "gc.h"
19
20 static struct proc_dir_entry *f2fs_proc_root;
21
22 /* Sysfs support for f2fs */
23 enum {
24 GC_THREAD, /* struct f2fs_gc_thread */
25 SM_INFO, /* struct f2fs_sm_info */
26 DCC_INFO, /* struct discard_cmd_control */
27 NM_INFO, /* struct f2fs_nm_info */
28 F2FS_SBI, /* struct f2fs_sb_info */
29 #ifdef CONFIG_F2FS_FAULT_INJECTION
30 FAULT_INFO_RATE, /* struct f2fs_fault_info */
31 FAULT_INFO_TYPE, /* struct f2fs_fault_info */
32 #endif
33 RESERVED_BLOCKS,
34 };
35
36 struct f2fs_attr {
37 struct attribute attr;
38 ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
39 ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
40 const char *, size_t);
41 int struct_type;
42 int offset;
43 int id;
44 };
45
46 static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
47 {
48 if (struct_type == GC_THREAD)
49 return (unsigned char *)sbi->gc_thread;
50 else if (struct_type == SM_INFO)
51 return (unsigned char *)SM_I(sbi);
52 else if (struct_type == DCC_INFO)
53 return (unsigned char *)SM_I(sbi)->dcc_info;
54 else if (struct_type == NM_INFO)
55 return (unsigned char *)NM_I(sbi);
56 else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS)
57 return (unsigned char *)sbi;
58 #ifdef CONFIG_F2FS_FAULT_INJECTION
59 else if (struct_type == FAULT_INFO_RATE ||
60 struct_type == FAULT_INFO_TYPE)
61 return (unsigned char *)&sbi->fault_info;
62 #endif
63 return NULL;
64 }
65
66 static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
67 struct f2fs_sb_info *sbi, char *buf)
68 {
69 struct super_block *sb = sbi->sb;
70
71 if (!sb->s_bdev->bd_part)
72 return snprintf(buf, PAGE_SIZE, "0\n");
73
74 return snprintf(buf, PAGE_SIZE, "%llu\n",
75 (unsigned long long)(sbi->kbytes_written +
76 BD_PART_WRITTEN(sbi)));
77 }
78
79 static ssize_t features_show(struct f2fs_attr *a,
80 struct f2fs_sb_info *sbi, char *buf)
81 {
82 struct super_block *sb = sbi->sb;
83 int len = 0;
84
85 if (!sb->s_bdev->bd_part)
86 return snprintf(buf, PAGE_SIZE, "0\n");
87
88 if (f2fs_sb_has_crypto(sb))
89 len += snprintf(buf, PAGE_SIZE - len, "%s",
90 "encryption");
91 if (f2fs_sb_mounted_blkzoned(sb))
92 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
93 len ? ", " : "", "blkzoned");
94 if (f2fs_sb_has_extra_attr(sb))
95 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
96 len ? ", " : "", "extra_attr");
97 if (f2fs_sb_has_project_quota(sb))
98 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
99 len ? ", " : "", "projquota");
100 if (f2fs_sb_has_inode_chksum(sb))
101 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
102 len ? ", " : "", "inode_checksum");
103 len += snprintf(buf + len, PAGE_SIZE - len, "\n");
104 return len;
105 }
106
107 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
108 struct f2fs_sb_info *sbi, char *buf)
109 {
110 unsigned char *ptr = NULL;
111 unsigned int *ui;
112
113 ptr = __struct_ptr(sbi, a->struct_type);
114 if (!ptr)
115 return -EINVAL;
116
117 ui = (unsigned int *)(ptr + a->offset);
118
119 return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
120 }
121
122 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
123 struct f2fs_sb_info *sbi,
124 const char *buf, size_t count)
125 {
126 unsigned char *ptr;
127 unsigned long t;
128 unsigned int *ui;
129 ssize_t ret;
130
131 ptr = __struct_ptr(sbi, a->struct_type);
132 if (!ptr)
133 return -EINVAL;
134
135 ui = (unsigned int *)(ptr + a->offset);
136
137 ret = kstrtoul(skip_spaces(buf), 0, &t);
138 if (ret < 0)
139 return ret;
140 #ifdef CONFIG_F2FS_FAULT_INJECTION
141 if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
142 return -EINVAL;
143 #endif
144 if (a->struct_type == RESERVED_BLOCKS) {
145 spin_lock(&sbi->stat_lock);
146 if ((unsigned long)sbi->total_valid_block_count + t >
147 (unsigned long)sbi->user_block_count) {
148 spin_unlock(&sbi->stat_lock);
149 return -EINVAL;
150 }
151 *ui = t;
152 spin_unlock(&sbi->stat_lock);
153 return count;
154 }
155
156 if (!strcmp(a->attr.name, "discard_granularity")) {
157 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
158 int i;
159
160 if (t == 0 || t > MAX_PLIST_NUM)
161 return -EINVAL;
162 if (t == *ui)
163 return count;
164
165 mutex_lock(&dcc->cmd_lock);
166 for (i = 0; i < MAX_PLIST_NUM; i++) {
167 if (i >= t - 1)
168 dcc->pend_list_tag[i] |= P_ACTIVE;
169 else
170 dcc->pend_list_tag[i] &= (~P_ACTIVE);
171 }
172 mutex_unlock(&dcc->cmd_lock);
173
174 *ui = t;
175 return count;
176 }
177
178 *ui = t;
179
180 if (!strcmp(a->attr.name, "iostat_enable") && *ui == 0)
181 f2fs_reset_iostat(sbi);
182 if (!strcmp(a->attr.name, "gc_urgent") && t == 1 && sbi->gc_thread) {
183 sbi->gc_thread->gc_wake = 1;
184 wake_up_interruptible_all(&sbi->gc_thread->gc_wait_queue_head);
185 wake_up_discard_thread(sbi, true);
186 }
187
188 return count;
189 }
190
191 static ssize_t f2fs_attr_show(struct kobject *kobj,
192 struct attribute *attr, char *buf)
193 {
194 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
195 s_kobj);
196 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
197
198 return a->show ? a->show(a, sbi, buf) : 0;
199 }
200
201 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
202 const char *buf, size_t len)
203 {
204 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
205 s_kobj);
206 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
207
208 return a->store ? a->store(a, sbi, buf, len) : 0;
209 }
210
211 static void f2fs_sb_release(struct kobject *kobj)
212 {
213 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
214 s_kobj);
215 complete(&sbi->s_kobj_unregister);
216 }
217
218 enum feat_id {
219 FEAT_CRYPTO = 0,
220 FEAT_BLKZONED,
221 FEAT_ATOMIC_WRITE,
222 FEAT_EXTRA_ATTR,
223 FEAT_PROJECT_QUOTA,
224 FEAT_INODE_CHECKSUM,
225 };
226
227 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
228 struct f2fs_sb_info *sbi, char *buf)
229 {
230 switch (a->id) {
231 case FEAT_CRYPTO:
232 case FEAT_BLKZONED:
233 case FEAT_ATOMIC_WRITE:
234 case FEAT_EXTRA_ATTR:
235 case FEAT_PROJECT_QUOTA:
236 case FEAT_INODE_CHECKSUM:
237 return snprintf(buf, PAGE_SIZE, "supported\n");
238 }
239 return 0;
240 }
241
242 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
243 static struct f2fs_attr f2fs_attr_##_name = { \
244 .attr = {.name = __stringify(_name), .mode = _mode }, \
245 .show = _show, \
246 .store = _store, \
247 .struct_type = _struct_type, \
248 .offset = _offset \
249 }
250
251 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \
252 F2FS_ATTR_OFFSET(struct_type, name, 0644, \
253 f2fs_sbi_show, f2fs_sbi_store, \
254 offsetof(struct struct_name, elname))
255
256 #define F2FS_GENERAL_RO_ATTR(name) \
257 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
258
259 #define F2FS_FEATURE_RO_ATTR(_name, _id) \
260 static struct f2fs_attr f2fs_attr_##_name = { \
261 .attr = {.name = __stringify(_name), .mode = 0444 }, \
262 .show = f2fs_feature_show, \
263 .id = _id, \
264 }
265
266 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
267 urgent_sleep_time);
268 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
269 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
270 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
271 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle);
272 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent, gc_urgent);
273 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
274 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
275 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
276 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
277 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
278 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
279 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
280 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
281 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
282 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
283 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
284 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
285 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
286 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
287 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
288 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
289 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
290 #ifdef CONFIG_F2FS_FAULT_INJECTION
291 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
292 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
293 #endif
294 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
295 F2FS_GENERAL_RO_ATTR(features);
296
297 #ifdef CONFIG_F2FS_FS_ENCRYPTION
298 F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO);
299 #endif
300 #ifdef CONFIG_BLK_DEV_ZONED
301 F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED);
302 #endif
303 F2FS_FEATURE_RO_ATTR(atomic_write, FEAT_ATOMIC_WRITE);
304 F2FS_FEATURE_RO_ATTR(extra_attr, FEAT_EXTRA_ATTR);
305 F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA);
306 F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM);
307
308 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
309 static struct attribute *f2fs_attrs[] = {
310 ATTR_LIST(gc_urgent_sleep_time),
311 ATTR_LIST(gc_min_sleep_time),
312 ATTR_LIST(gc_max_sleep_time),
313 ATTR_LIST(gc_no_gc_sleep_time),
314 ATTR_LIST(gc_idle),
315 ATTR_LIST(gc_urgent),
316 ATTR_LIST(reclaim_segments),
317 ATTR_LIST(max_small_discards),
318 ATTR_LIST(discard_granularity),
319 ATTR_LIST(batched_trim_sections),
320 ATTR_LIST(ipu_policy),
321 ATTR_LIST(min_ipu_util),
322 ATTR_LIST(min_fsync_blocks),
323 ATTR_LIST(min_hot_blocks),
324 ATTR_LIST(max_victim_search),
325 ATTR_LIST(dir_level),
326 ATTR_LIST(ram_thresh),
327 ATTR_LIST(ra_nid_pages),
328 ATTR_LIST(dirty_nats_ratio),
329 ATTR_LIST(cp_interval),
330 ATTR_LIST(idle_interval),
331 ATTR_LIST(iostat_enable),
332 #ifdef CONFIG_F2FS_FAULT_INJECTION
333 ATTR_LIST(inject_rate),
334 ATTR_LIST(inject_type),
335 #endif
336 ATTR_LIST(lifetime_write_kbytes),
337 ATTR_LIST(features),
338 ATTR_LIST(reserved_blocks),
339 NULL,
340 };
341
342 static struct attribute *f2fs_feat_attrs[] = {
343 #ifdef CONFIG_F2FS_FS_ENCRYPTION
344 ATTR_LIST(encryption),
345 #endif
346 #ifdef CONFIG_BLK_DEV_ZONED
347 ATTR_LIST(block_zoned),
348 #endif
349 ATTR_LIST(atomic_write),
350 ATTR_LIST(extra_attr),
351 ATTR_LIST(project_quota),
352 ATTR_LIST(inode_checksum),
353 NULL,
354 };
355
356 static const struct sysfs_ops f2fs_attr_ops = {
357 .show = f2fs_attr_show,
358 .store = f2fs_attr_store,
359 };
360
361 static struct kobj_type f2fs_sb_ktype = {
362 .default_attrs = f2fs_attrs,
363 .sysfs_ops = &f2fs_attr_ops,
364 .release = f2fs_sb_release,
365 };
366
367 static struct kobj_type f2fs_ktype = {
368 .sysfs_ops = &f2fs_attr_ops,
369 };
370
371 static struct kset f2fs_kset = {
372 .kobj = {.ktype = &f2fs_ktype},
373 };
374
375 static struct kobj_type f2fs_feat_ktype = {
376 .default_attrs = f2fs_feat_attrs,
377 .sysfs_ops = &f2fs_attr_ops,
378 };
379
380 static struct kobject f2fs_feat = {
381 .kset = &f2fs_kset,
382 };
383
384 static int segment_info_seq_show(struct seq_file *seq, void *offset)
385 {
386 struct super_block *sb = seq->private;
387 struct f2fs_sb_info *sbi = F2FS_SB(sb);
388 unsigned int total_segs =
389 le32_to_cpu(sbi->raw_super->segment_count_main);
390 int i;
391
392 seq_puts(seq, "format: segment_type|valid_blocks\n"
393 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
394
395 for (i = 0; i < total_segs; i++) {
396 struct seg_entry *se = get_seg_entry(sbi, i);
397
398 if ((i % 10) == 0)
399 seq_printf(seq, "%-10d", i);
400 seq_printf(seq, "%d|%-3u", se->type,
401 get_valid_blocks(sbi, i, false));
402 if ((i % 10) == 9 || i == (total_segs - 1))
403 seq_putc(seq, '\n');
404 else
405 seq_putc(seq, ' ');
406 }
407
408 return 0;
409 }
410
411 static int segment_bits_seq_show(struct seq_file *seq, void *offset)
412 {
413 struct super_block *sb = seq->private;
414 struct f2fs_sb_info *sbi = F2FS_SB(sb);
415 unsigned int total_segs =
416 le32_to_cpu(sbi->raw_super->segment_count_main);
417 int i, j;
418
419 seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
420 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
421
422 for (i = 0; i < total_segs; i++) {
423 struct seg_entry *se = get_seg_entry(sbi, i);
424
425 seq_printf(seq, "%-10d", i);
426 seq_printf(seq, "%d|%-3u|", se->type,
427 get_valid_blocks(sbi, i, false));
428 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
429 seq_printf(seq, " %.2x", se->cur_valid_map[j]);
430 seq_putc(seq, '\n');
431 }
432 return 0;
433 }
434
435 static int iostat_info_seq_show(struct seq_file *seq, void *offset)
436 {
437 struct super_block *sb = seq->private;
438 struct f2fs_sb_info *sbi = F2FS_SB(sb);
439 time64_t now = ktime_get_real_seconds();
440
441 if (!sbi->iostat_enable)
442 return 0;
443
444 seq_printf(seq, "time: %-16llu\n", now);
445
446 /* print app IOs */
447 seq_printf(seq, "app buffered: %-16llu\n",
448 sbi->write_iostat[APP_BUFFERED_IO]);
449 seq_printf(seq, "app direct: %-16llu\n",
450 sbi->write_iostat[APP_DIRECT_IO]);
451 seq_printf(seq, "app mapped: %-16llu\n",
452 sbi->write_iostat[APP_MAPPED_IO]);
453
454 /* print fs IOs */
455 seq_printf(seq, "fs data: %-16llu\n",
456 sbi->write_iostat[FS_DATA_IO]);
457 seq_printf(seq, "fs node: %-16llu\n",
458 sbi->write_iostat[FS_NODE_IO]);
459 seq_printf(seq, "fs meta: %-16llu\n",
460 sbi->write_iostat[FS_META_IO]);
461 seq_printf(seq, "fs gc data: %-16llu\n",
462 sbi->write_iostat[FS_GC_DATA_IO]);
463 seq_printf(seq, "fs gc node: %-16llu\n",
464 sbi->write_iostat[FS_GC_NODE_IO]);
465 seq_printf(seq, "fs cp data: %-16llu\n",
466 sbi->write_iostat[FS_CP_DATA_IO]);
467 seq_printf(seq, "fs cp node: %-16llu\n",
468 sbi->write_iostat[FS_CP_NODE_IO]);
469 seq_printf(seq, "fs cp meta: %-16llu\n",
470 sbi->write_iostat[FS_CP_META_IO]);
471 seq_printf(seq, "fs discard: %-16llu\n",
472 sbi->write_iostat[FS_DISCARD]);
473
474 return 0;
475 }
476
477 #define F2FS_PROC_FILE_DEF(_name) \
478 static int _name##_open_fs(struct inode *inode, struct file *file) \
479 { \
480 return single_open(file, _name##_seq_show, PDE_DATA(inode)); \
481 } \
482 \
483 static const struct file_operations f2fs_seq_##_name##_fops = { \
484 .open = _name##_open_fs, \
485 .read = seq_read, \
486 .llseek = seq_lseek, \
487 .release = single_release, \
488 };
489
490 F2FS_PROC_FILE_DEF(segment_info);
491 F2FS_PROC_FILE_DEF(segment_bits);
492 F2FS_PROC_FILE_DEF(iostat_info);
493
494 int __init f2fs_init_sysfs(void)
495 {
496 int ret;
497
498 kobject_set_name(&f2fs_kset.kobj, "f2fs");
499 f2fs_kset.kobj.parent = fs_kobj;
500 ret = kset_register(&f2fs_kset);
501 if (ret)
502 return ret;
503
504 ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
505 NULL, "features");
506 if (ret)
507 kset_unregister(&f2fs_kset);
508 else
509 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
510 return ret;
511 }
512
513 void f2fs_exit_sysfs(void)
514 {
515 kobject_put(&f2fs_feat);
516 kset_unregister(&f2fs_kset);
517 remove_proc_entry("fs/f2fs", NULL);
518 f2fs_proc_root = NULL;
519 }
520
521 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
522 {
523 struct super_block *sb = sbi->sb;
524 int err;
525
526 sbi->s_kobj.kset = &f2fs_kset;
527 init_completion(&sbi->s_kobj_unregister);
528 err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
529 "%s", sb->s_id);
530 if (err)
531 return err;
532
533 if (f2fs_proc_root)
534 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
535
536 if (sbi->s_proc) {
537 proc_create_data("segment_info", S_IRUGO, sbi->s_proc,
538 &f2fs_seq_segment_info_fops, sb);
539 proc_create_data("segment_bits", S_IRUGO, sbi->s_proc,
540 &f2fs_seq_segment_bits_fops, sb);
541 proc_create_data("iostat_info", S_IRUGO, sbi->s_proc,
542 &f2fs_seq_iostat_info_fops, sb);
543 }
544 return 0;
545 }
546
547 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
548 {
549 if (sbi->s_proc) {
550 remove_proc_entry("iostat_info", sbi->s_proc);
551 remove_proc_entry("segment_info", sbi->s_proc);
552 remove_proc_entry("segment_bits", sbi->s_proc);
553 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
554 }
555 kobject_del(&sbi->s_kobj);
556 }
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