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7c1a000d | 1 | // SPDX-License-Identifier: GPL-2.0 |
0a8165d7 | 2 | /* |
7bc09003 JK |
3 | * fs/f2fs/gc.c |
4 | * | |
5 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
6 | * http://www.samsung.com/ | |
7bc09003 JK |
7 | */ |
8 | #include <linux/fs.h> | |
9 | #include <linux/module.h> | |
10 | #include <linux/backing-dev.h> | |
7bc09003 JK |
11 | #include <linux/init.h> |
12 | #include <linux/f2fs_fs.h> | |
13 | #include <linux/kthread.h> | |
14 | #include <linux/delay.h> | |
15 | #include <linux/freezer.h> | |
b4b10061 | 16 | #include <linux/sched/signal.h> |
6691d940 | 17 | #include <linux/random.h> |
7bc09003 JK |
18 | |
19 | #include "f2fs.h" | |
20 | #include "node.h" | |
21 | #include "segment.h" | |
22 | #include "gc.h" | |
52118743 | 23 | #include "iostat.h" |
8e46b3ed | 24 | #include <trace/events/f2fs.h> |
7bc09003 | 25 | |
093749e2 CY |
26 | static struct kmem_cache *victim_entry_slab; |
27 | ||
da52f8ad JQ |
28 | static unsigned int count_bits(const unsigned long *addr, |
29 | unsigned int offset, unsigned int len); | |
30 | ||
7bc09003 JK |
31 | static int gc_thread_func(void *data) |
32 | { | |
33 | struct f2fs_sb_info *sbi = data; | |
b59d0bae | 34 | struct f2fs_gc_kthread *gc_th = sbi->gc_thread; |
7bc09003 | 35 | wait_queue_head_t *wq = &sbi->gc_thread->gc_wait_queue_head; |
5911d2d1 | 36 | wait_queue_head_t *fggc_wq = &sbi->gc_thread->fggc_wq; |
b8c502b8 | 37 | unsigned int wait_ms; |
7bc09003 | 38 | |
b59d0bae | 39 | wait_ms = gc_th->min_sleep_time; |
7bc09003 | 40 | |
1d7be270 | 41 | set_freezable(); |
7bc09003 | 42 | do { |
5911d2d1 | 43 | bool sync_mode, foreground = false; |
bbbc34fd | 44 | |
1d7be270 | 45 | wait_event_interruptible_timeout(*wq, |
d9872a69 | 46 | kthread_should_stop() || freezing(current) || |
5911d2d1 | 47 | waitqueue_active(fggc_wq) || |
d9872a69 | 48 | gc_th->gc_wake, |
1d7be270 JK |
49 | msecs_to_jiffies(wait_ms)); |
50 | ||
5911d2d1 CY |
51 | if (test_opt(sbi, GC_MERGE) && waitqueue_active(fggc_wq)) |
52 | foreground = true; | |
53 | ||
d9872a69 JK |
54 | /* give it a try one time */ |
55 | if (gc_th->gc_wake) | |
56 | gc_th->gc_wake = 0; | |
57 | ||
274bd9ba CY |
58 | if (try_to_freeze()) { |
59 | stat_other_skip_bggc_count(sbi); | |
7bc09003 | 60 | continue; |
274bd9ba | 61 | } |
7bc09003 JK |
62 | if (kthread_should_stop()) |
63 | break; | |
64 | ||
d6212a5f | 65 | if (sbi->sb->s_writers.frozen >= SB_FREEZE_WRITE) { |
88dd8934 | 66 | increase_sleep_time(gc_th, &wait_ms); |
274bd9ba | 67 | stat_other_skip_bggc_count(sbi); |
d6212a5f CL |
68 | continue; |
69 | } | |
70 | ||
55523519 | 71 | if (time_to_inject(sbi, FAULT_CHECKPOINT)) { |
c45d6002 | 72 | f2fs_show_injection_info(sbi, FAULT_CHECKPOINT); |
0f348028 | 73 | f2fs_stop_checkpoint(sbi, false); |
55523519 | 74 | } |
0f348028 | 75 | |
274bd9ba CY |
76 | if (!sb_start_write_trylock(sbi->sb)) { |
77 | stat_other_skip_bggc_count(sbi); | |
dc6febb6 | 78 | continue; |
274bd9ba | 79 | } |
dc6febb6 | 80 | |
7bc09003 JK |
81 | /* |
82 | * [GC triggering condition] | |
83 | * 0. GC is not conducted currently. | |
84 | * 1. There are enough dirty segments. | |
85 | * 2. IO subsystem is idle by checking the # of writeback pages. | |
86 | * 3. IO subsystem is idle by checking the # of requests in | |
87 | * bdev's request list. | |
88 | * | |
e1c42045 | 89 | * Note) We have to avoid triggering GCs frequently. |
7bc09003 JK |
90 | * Because it is possible that some segments can be |
91 | * invalidated soon after by user update or deletion. | |
92 | * So, I'd like to wait some time to collect dirty segments. | |
93 | */ | |
0e5e8111 | 94 | if (sbi->gc_mode == GC_URGENT_HIGH) { |
d9872a69 | 95 | wait_ms = gc_th->urgent_sleep_time; |
fb24fea7 | 96 | down_write(&sbi->gc_lock); |
d9872a69 JK |
97 | goto do_gc; |
98 | } | |
99 | ||
5911d2d1 CY |
100 | if (foreground) { |
101 | down_write(&sbi->gc_lock); | |
102 | goto do_gc; | |
103 | } else if (!down_write_trylock(&sbi->gc_lock)) { | |
274bd9ba | 104 | stat_other_skip_bggc_count(sbi); |
69babac0 | 105 | goto next; |
274bd9ba | 106 | } |
69babac0 | 107 | |
a7d10cf3 | 108 | if (!is_idle(sbi, GC_TIME)) { |
88dd8934 | 109 | increase_sleep_time(gc_th, &wait_ms); |
fb24fea7 | 110 | up_write(&sbi->gc_lock); |
274bd9ba | 111 | stat_io_skip_bggc_count(sbi); |
dc6febb6 | 112 | goto next; |
7bc09003 JK |
113 | } |
114 | ||
115 | if (has_enough_invalid_blocks(sbi)) | |
88dd8934 | 116 | decrease_sleep_time(gc_th, &wait_ms); |
7bc09003 | 117 | else |
88dd8934 | 118 | increase_sleep_time(gc_th, &wait_ms); |
d9872a69 | 119 | do_gc: |
5911d2d1 CY |
120 | if (!foreground) |
121 | stat_inc_bggc_count(sbi->stat_info); | |
7bc09003 | 122 | |
bbbc34fd CY |
123 | sync_mode = F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC; |
124 | ||
5911d2d1 CY |
125 | /* foreground GC was been triggered via f2fs_balance_fs() */ |
126 | if (foreground) | |
127 | sync_mode = false; | |
128 | ||
43727527 | 129 | /* if return value is not zero, no victim was selected */ |
5911d2d1 | 130 | if (f2fs_gc(sbi, sync_mode, !foreground, false, NULL_SEGNO)) |
b59d0bae | 131 | wait_ms = gc_th->no_gc_sleep_time; |
81eb8d6e | 132 | |
5911d2d1 CY |
133 | if (foreground) |
134 | wake_up_all(&gc_th->fggc_wq); | |
135 | ||
84e4214f JK |
136 | trace_f2fs_background_gc(sbi->sb, wait_ms, |
137 | prefree_segments(sbi), free_segments(sbi)); | |
138 | ||
4660f9c0 | 139 | /* balancing f2fs's metadata periodically */ |
7bcd0cfa | 140 | f2fs_balance_fs_bg(sbi, true); |
dc6febb6 CY |
141 | next: |
142 | sb_end_write(sbi->sb); | |
81eb8d6e | 143 | |
7bc09003 JK |
144 | } while (!kthread_should_stop()); |
145 | return 0; | |
146 | } | |
147 | ||
4d57b86d | 148 | int f2fs_start_gc_thread(struct f2fs_sb_info *sbi) |
7bc09003 | 149 | { |
1042d60f | 150 | struct f2fs_gc_kthread *gc_th; |
ec7b1f2d | 151 | dev_t dev = sbi->sb->s_bdev->bd_dev; |
7a267f8d | 152 | int err = 0; |
7bc09003 | 153 | |
1ecc0c5c | 154 | gc_th = f2fs_kmalloc(sbi, sizeof(struct f2fs_gc_kthread), GFP_KERNEL); |
7a267f8d NJ |
155 | if (!gc_th) { |
156 | err = -ENOMEM; | |
157 | goto out; | |
158 | } | |
7bc09003 | 159 | |
d9872a69 | 160 | gc_th->urgent_sleep_time = DEF_GC_THREAD_URGENT_SLEEP_TIME; |
b59d0bae NJ |
161 | gc_th->min_sleep_time = DEF_GC_THREAD_MIN_SLEEP_TIME; |
162 | gc_th->max_sleep_time = DEF_GC_THREAD_MAX_SLEEP_TIME; | |
163 | gc_th->no_gc_sleep_time = DEF_GC_THREAD_NOGC_SLEEP_TIME; | |
164 | ||
5f029c04 | 165 | gc_th->gc_wake = 0; |
d2dc095f | 166 | |
7bc09003 JK |
167 | sbi->gc_thread = gc_th; |
168 | init_waitqueue_head(&sbi->gc_thread->gc_wait_queue_head); | |
5911d2d1 | 169 | init_waitqueue_head(&sbi->gc_thread->fggc_wq); |
7bc09003 | 170 | sbi->gc_thread->f2fs_gc_task = kthread_run(gc_thread_func, sbi, |
ec7b1f2d | 171 | "f2fs_gc-%u:%u", MAJOR(dev), MINOR(dev)); |
7bc09003 | 172 | if (IS_ERR(gc_th->f2fs_gc_task)) { |
7a267f8d | 173 | err = PTR_ERR(gc_th->f2fs_gc_task); |
c8eb7024 | 174 | kfree(gc_th); |
25718423 | 175 | sbi->gc_thread = NULL; |
7bc09003 | 176 | } |
7a267f8d NJ |
177 | out: |
178 | return err; | |
7bc09003 JK |
179 | } |
180 | ||
4d57b86d | 181 | void f2fs_stop_gc_thread(struct f2fs_sb_info *sbi) |
7bc09003 JK |
182 | { |
183 | struct f2fs_gc_kthread *gc_th = sbi->gc_thread; | |
5f029c04 | 184 | |
7bc09003 JK |
185 | if (!gc_th) |
186 | return; | |
187 | kthread_stop(gc_th->f2fs_gc_task); | |
5911d2d1 | 188 | wake_up_all(&gc_th->fggc_wq); |
c8eb7024 | 189 | kfree(gc_th); |
7bc09003 JK |
190 | sbi->gc_thread = NULL; |
191 | } | |
192 | ||
5b0e9539 | 193 | static int select_gc_type(struct f2fs_sb_info *sbi, int gc_type) |
7bc09003 | 194 | { |
093749e2 CY |
195 | int gc_mode; |
196 | ||
197 | if (gc_type == BG_GC) { | |
198 | if (sbi->am.atgc_enabled) | |
199 | gc_mode = GC_AT; | |
200 | else | |
201 | gc_mode = GC_CB; | |
202 | } else { | |
203 | gc_mode = GC_GREEDY; | |
204 | } | |
d2dc095f | 205 | |
5b0e9539 JK |
206 | switch (sbi->gc_mode) { |
207 | case GC_IDLE_CB: | |
208 | gc_mode = GC_CB; | |
209 | break; | |
210 | case GC_IDLE_GREEDY: | |
0e5e8111 | 211 | case GC_URGENT_HIGH: |
b27bc809 | 212 | gc_mode = GC_GREEDY; |
5b0e9539 | 213 | break; |
093749e2 CY |
214 | case GC_IDLE_AT: |
215 | gc_mode = GC_AT; | |
216 | break; | |
5b0e9539 | 217 | } |
093749e2 | 218 | |
d2dc095f | 219 | return gc_mode; |
7bc09003 JK |
220 | } |
221 | ||
222 | static void select_policy(struct f2fs_sb_info *sbi, int gc_type, | |
223 | int type, struct victim_sel_policy *p) | |
224 | { | |
225 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
226 | ||
4ebefc44 | 227 | if (p->alloc_mode == SSR) { |
7bc09003 | 228 | p->gc_mode = GC_GREEDY; |
da52f8ad | 229 | p->dirty_bitmap = dirty_i->dirty_segmap[type]; |
a26b7c8a | 230 | p->max_search = dirty_i->nr_dirty[type]; |
7bc09003 | 231 | p->ofs_unit = 1; |
093749e2 CY |
232 | } else if (p->alloc_mode == AT_SSR) { |
233 | p->gc_mode = GC_GREEDY; | |
234 | p->dirty_bitmap = dirty_i->dirty_segmap[type]; | |
235 | p->max_search = dirty_i->nr_dirty[type]; | |
236 | p->ofs_unit = 1; | |
7bc09003 | 237 | } else { |
5b0e9539 | 238 | p->gc_mode = select_gc_type(sbi, gc_type); |
7bc09003 | 239 | p->ofs_unit = sbi->segs_per_sec; |
da52f8ad JQ |
240 | if (__is_large_section(sbi)) { |
241 | p->dirty_bitmap = dirty_i->dirty_secmap; | |
242 | p->max_search = count_bits(p->dirty_bitmap, | |
243 | 0, MAIN_SECS(sbi)); | |
244 | } else { | |
245 | p->dirty_bitmap = dirty_i->dirty_segmap[DIRTY]; | |
246 | p->max_search = dirty_i->nr_dirty[DIRTY]; | |
247 | } | |
7bc09003 | 248 | } |
a26b7c8a | 249 | |
7a88ddb5 CY |
250 | /* |
251 | * adjust candidates range, should select all dirty segments for | |
252 | * foreground GC and urgent GC cases. | |
253 | */ | |
b27bc809 | 254 | if (gc_type != FG_GC && |
0e5e8111 | 255 | (sbi->gc_mode != GC_URGENT_HIGH) && |
093749e2 | 256 | (p->gc_mode != GC_AT && p->alloc_mode != AT_SSR) && |
b27bc809 | 257 | p->max_search > sbi->max_victim_search) |
b1c57c1c | 258 | p->max_search = sbi->max_victim_search; |
a26b7c8a | 259 | |
b94929d9 | 260 | /* let's select beginning hot/small space first in no_heap mode*/ |
6691d940 DJ |
261 | if (f2fs_need_rand_seg(sbi)) |
262 | p->offset = prandom_u32() % (MAIN_SECS(sbi) * sbi->segs_per_sec); | |
263 | else if (test_opt(sbi, NOHEAP) && | |
b94929d9 | 264 | (type == CURSEG_HOT_DATA || IS_NODESEG(type))) |
7a20b8a6 JK |
265 | p->offset = 0; |
266 | else | |
e066b83c | 267 | p->offset = SIT_I(sbi)->last_victim[p->gc_mode]; |
7bc09003 JK |
268 | } |
269 | ||
270 | static unsigned int get_max_cost(struct f2fs_sb_info *sbi, | |
271 | struct victim_sel_policy *p) | |
272 | { | |
b7250d2d JK |
273 | /* SSR allocates in a segment unit */ |
274 | if (p->alloc_mode == SSR) | |
3519e3f9 | 275 | return sbi->blocks_per_seg; |
093749e2 CY |
276 | else if (p->alloc_mode == AT_SSR) |
277 | return UINT_MAX; | |
278 | ||
279 | /* LFS */ | |
7bc09003 | 280 | if (p->gc_mode == GC_GREEDY) |
c541a51b | 281 | return 2 * sbi->blocks_per_seg * p->ofs_unit; |
7bc09003 JK |
282 | else if (p->gc_mode == GC_CB) |
283 | return UINT_MAX; | |
093749e2 CY |
284 | else if (p->gc_mode == GC_AT) |
285 | return UINT_MAX; | |
7bc09003 JK |
286 | else /* No other gc_mode */ |
287 | return 0; | |
288 | } | |
289 | ||
290 | static unsigned int check_bg_victims(struct f2fs_sb_info *sbi) | |
291 | { | |
292 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
5ec4e49f | 293 | unsigned int secno; |
7bc09003 JK |
294 | |
295 | /* | |
296 | * If the gc_type is FG_GC, we can select victim segments | |
297 | * selected by background GC before. | |
298 | * Those segments guarantee they have small valid blocks. | |
299 | */ | |
7cd8558b | 300 | for_each_set_bit(secno, dirty_i->victim_secmap, MAIN_SECS(sbi)) { |
5ec4e49f | 301 | if (sec_usage_check(sbi, secno)) |
b65ee148 | 302 | continue; |
5ec4e49f | 303 | clear_bit(secno, dirty_i->victim_secmap); |
4ddb1a4d | 304 | return GET_SEG_FROM_SEC(sbi, secno); |
7bc09003 JK |
305 | } |
306 | return NULL_SEGNO; | |
307 | } | |
308 | ||
309 | static unsigned int get_cb_cost(struct f2fs_sb_info *sbi, unsigned int segno) | |
310 | { | |
311 | struct sit_info *sit_i = SIT_I(sbi); | |
4ddb1a4d JK |
312 | unsigned int secno = GET_SEC_FROM_SEG(sbi, segno); |
313 | unsigned int start = GET_SEG_FROM_SEC(sbi, secno); | |
7bc09003 JK |
314 | unsigned long long mtime = 0; |
315 | unsigned int vblocks; | |
316 | unsigned char age = 0; | |
317 | unsigned char u; | |
318 | unsigned int i; | |
de881df9 | 319 | unsigned int usable_segs_per_sec = f2fs_usable_segs_in_sec(sbi, segno); |
7bc09003 | 320 | |
de881df9 | 321 | for (i = 0; i < usable_segs_per_sec; i++) |
7bc09003 | 322 | mtime += get_seg_entry(sbi, start + i)->mtime; |
302bd348 | 323 | vblocks = get_valid_blocks(sbi, segno, true); |
7bc09003 | 324 | |
de881df9 AR |
325 | mtime = div_u64(mtime, usable_segs_per_sec); |
326 | vblocks = div_u64(vblocks, usable_segs_per_sec); | |
7bc09003 JK |
327 | |
328 | u = (vblocks * 100) >> sbi->log_blocks_per_seg; | |
329 | ||
e1c42045 | 330 | /* Handle if the system time has changed by the user */ |
7bc09003 JK |
331 | if (mtime < sit_i->min_mtime) |
332 | sit_i->min_mtime = mtime; | |
333 | if (mtime > sit_i->max_mtime) | |
334 | sit_i->max_mtime = mtime; | |
335 | if (sit_i->max_mtime != sit_i->min_mtime) | |
336 | age = 100 - div64_u64(100 * (mtime - sit_i->min_mtime), | |
337 | sit_i->max_mtime - sit_i->min_mtime); | |
338 | ||
339 | return UINT_MAX - ((100 * (100 - u) * age) / (100 + u)); | |
340 | } | |
341 | ||
a57e564d JX |
342 | static inline unsigned int get_gc_cost(struct f2fs_sb_info *sbi, |
343 | unsigned int segno, struct victim_sel_policy *p) | |
7bc09003 JK |
344 | { |
345 | if (p->alloc_mode == SSR) | |
2afce76a | 346 | return get_seg_entry(sbi, segno)->ckpt_valid_blocks; |
7bc09003 JK |
347 | |
348 | /* alloc_mode == LFS */ | |
349 | if (p->gc_mode == GC_GREEDY) | |
91f4382b | 350 | return get_valid_blocks(sbi, segno, true); |
093749e2 | 351 | else if (p->gc_mode == GC_CB) |
7bc09003 | 352 | return get_cb_cost(sbi, segno); |
093749e2 CY |
353 | |
354 | f2fs_bug_on(sbi, 1); | |
355 | return 0; | |
7bc09003 JK |
356 | } |
357 | ||
688159b6 FL |
358 | static unsigned int count_bits(const unsigned long *addr, |
359 | unsigned int offset, unsigned int len) | |
360 | { | |
361 | unsigned int end = offset + len, sum = 0; | |
362 | ||
363 | while (offset < end) { | |
364 | if (test_bit(offset++, addr)) | |
365 | ++sum; | |
366 | } | |
367 | return sum; | |
368 | } | |
369 | ||
093749e2 CY |
370 | static struct victim_entry *attach_victim_entry(struct f2fs_sb_info *sbi, |
371 | unsigned long long mtime, unsigned int segno, | |
372 | struct rb_node *parent, struct rb_node **p, | |
373 | bool left_most) | |
374 | { | |
375 | struct atgc_management *am = &sbi->am; | |
376 | struct victim_entry *ve; | |
377 | ||
32410577 CY |
378 | ve = f2fs_kmem_cache_alloc(victim_entry_slab, |
379 | GFP_NOFS, true, NULL); | |
093749e2 CY |
380 | |
381 | ve->mtime = mtime; | |
382 | ve->segno = segno; | |
383 | ||
384 | rb_link_node(&ve->rb_node, parent, p); | |
385 | rb_insert_color_cached(&ve->rb_node, &am->root, left_most); | |
386 | ||
387 | list_add_tail(&ve->list, &am->victim_list); | |
388 | ||
389 | am->victim_count++; | |
390 | ||
391 | return ve; | |
392 | } | |
393 | ||
394 | static void insert_victim_entry(struct f2fs_sb_info *sbi, | |
395 | unsigned long long mtime, unsigned int segno) | |
396 | { | |
397 | struct atgc_management *am = &sbi->am; | |
398 | struct rb_node **p; | |
399 | struct rb_node *parent = NULL; | |
400 | bool left_most = true; | |
401 | ||
402 | p = f2fs_lookup_rb_tree_ext(sbi, &am->root, &parent, mtime, &left_most); | |
403 | attach_victim_entry(sbi, mtime, segno, parent, p, left_most); | |
404 | } | |
405 | ||
406 | static void add_victim_entry(struct f2fs_sb_info *sbi, | |
407 | struct victim_sel_policy *p, unsigned int segno) | |
408 | { | |
409 | struct sit_info *sit_i = SIT_I(sbi); | |
410 | unsigned int secno = GET_SEC_FROM_SEG(sbi, segno); | |
411 | unsigned int start = GET_SEG_FROM_SEC(sbi, secno); | |
412 | unsigned long long mtime = 0; | |
413 | unsigned int i; | |
414 | ||
415 | if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) { | |
416 | if (p->gc_mode == GC_AT && | |
417 | get_valid_blocks(sbi, segno, true) == 0) | |
418 | return; | |
093749e2 CY |
419 | } |
420 | ||
421 | for (i = 0; i < sbi->segs_per_sec; i++) | |
422 | mtime += get_seg_entry(sbi, start + i)->mtime; | |
423 | mtime = div_u64(mtime, sbi->segs_per_sec); | |
424 | ||
425 | /* Handle if the system time has changed by the user */ | |
426 | if (mtime < sit_i->min_mtime) | |
427 | sit_i->min_mtime = mtime; | |
428 | if (mtime > sit_i->max_mtime) | |
429 | sit_i->max_mtime = mtime; | |
430 | if (mtime < sit_i->dirty_min_mtime) | |
431 | sit_i->dirty_min_mtime = mtime; | |
432 | if (mtime > sit_i->dirty_max_mtime) | |
433 | sit_i->dirty_max_mtime = mtime; | |
434 | ||
435 | /* don't choose young section as candidate */ | |
436 | if (sit_i->dirty_max_mtime - mtime < p->age_threshold) | |
437 | return; | |
438 | ||
439 | insert_victim_entry(sbi, mtime, segno); | |
440 | } | |
441 | ||
442 | static struct rb_node *lookup_central_victim(struct f2fs_sb_info *sbi, | |
443 | struct victim_sel_policy *p) | |
444 | { | |
445 | struct atgc_management *am = &sbi->am; | |
446 | struct rb_node *parent = NULL; | |
447 | bool left_most; | |
448 | ||
449 | f2fs_lookup_rb_tree_ext(sbi, &am->root, &parent, p->age, &left_most); | |
450 | ||
451 | return parent; | |
452 | } | |
453 | ||
454 | static void atgc_lookup_victim(struct f2fs_sb_info *sbi, | |
455 | struct victim_sel_policy *p) | |
456 | { | |
457 | struct sit_info *sit_i = SIT_I(sbi); | |
458 | struct atgc_management *am = &sbi->am; | |
459 | struct rb_root_cached *root = &am->root; | |
460 | struct rb_node *node; | |
461 | struct rb_entry *re; | |
462 | struct victim_entry *ve; | |
463 | unsigned long long total_time; | |
464 | unsigned long long age, u, accu; | |
465 | unsigned long long max_mtime = sit_i->dirty_max_mtime; | |
466 | unsigned long long min_mtime = sit_i->dirty_min_mtime; | |
467 | unsigned int sec_blocks = BLKS_PER_SEC(sbi); | |
468 | unsigned int vblocks; | |
469 | unsigned int dirty_threshold = max(am->max_candidate_count, | |
470 | am->candidate_ratio * | |
471 | am->victim_count / 100); | |
472 | unsigned int age_weight = am->age_weight; | |
473 | unsigned int cost; | |
474 | unsigned int iter = 0; | |
475 | ||
476 | if (max_mtime < min_mtime) | |
477 | return; | |
478 | ||
479 | max_mtime += 1; | |
480 | total_time = max_mtime - min_mtime; | |
481 | ||
482 | accu = div64_u64(ULLONG_MAX, total_time); | |
483 | accu = min_t(unsigned long long, div_u64(accu, 100), | |
484 | DEFAULT_ACCURACY_CLASS); | |
485 | ||
486 | node = rb_first_cached(root); | |
487 | next: | |
488 | re = rb_entry_safe(node, struct rb_entry, rb_node); | |
489 | if (!re) | |
490 | return; | |
491 | ||
492 | ve = (struct victim_entry *)re; | |
493 | ||
494 | if (ve->mtime >= max_mtime || ve->mtime < min_mtime) | |
495 | goto skip; | |
496 | ||
497 | /* age = 10000 * x% * 60 */ | |
498 | age = div64_u64(accu * (max_mtime - ve->mtime), total_time) * | |
499 | age_weight; | |
500 | ||
501 | vblocks = get_valid_blocks(sbi, ve->segno, true); | |
502 | f2fs_bug_on(sbi, !vblocks || vblocks == sec_blocks); | |
503 | ||
504 | /* u = 10000 * x% * 40 */ | |
505 | u = div64_u64(accu * (sec_blocks - vblocks), sec_blocks) * | |
506 | (100 - age_weight); | |
507 | ||
508 | f2fs_bug_on(sbi, age + u >= UINT_MAX); | |
509 | ||
510 | cost = UINT_MAX - (age + u); | |
511 | iter++; | |
512 | ||
513 | if (cost < p->min_cost || | |
514 | (cost == p->min_cost && age > p->oldest_age)) { | |
515 | p->min_cost = cost; | |
516 | p->oldest_age = age; | |
517 | p->min_segno = ve->segno; | |
518 | } | |
519 | skip: | |
520 | if (iter < dirty_threshold) { | |
521 | node = rb_next(node); | |
522 | goto next; | |
523 | } | |
524 | } | |
525 | ||
526 | /* | |
527 | * select candidates around source section in range of | |
528 | * [target - dirty_threshold, target + dirty_threshold] | |
529 | */ | |
530 | static void atssr_lookup_victim(struct f2fs_sb_info *sbi, | |
531 | struct victim_sel_policy *p) | |
532 | { | |
533 | struct sit_info *sit_i = SIT_I(sbi); | |
534 | struct atgc_management *am = &sbi->am; | |
535 | struct rb_node *node; | |
536 | struct rb_entry *re; | |
537 | struct victim_entry *ve; | |
538 | unsigned long long age; | |
539 | unsigned long long max_mtime = sit_i->dirty_max_mtime; | |
540 | unsigned long long min_mtime = sit_i->dirty_min_mtime; | |
541 | unsigned int seg_blocks = sbi->blocks_per_seg; | |
542 | unsigned int vblocks; | |
543 | unsigned int dirty_threshold = max(am->max_candidate_count, | |
544 | am->candidate_ratio * | |
545 | am->victim_count / 100); | |
546 | unsigned int cost; | |
547 | unsigned int iter = 0; | |
548 | int stage = 0; | |
549 | ||
550 | if (max_mtime < min_mtime) | |
551 | return; | |
552 | max_mtime += 1; | |
553 | next_stage: | |
554 | node = lookup_central_victim(sbi, p); | |
555 | next_node: | |
556 | re = rb_entry_safe(node, struct rb_entry, rb_node); | |
557 | if (!re) { | |
558 | if (stage == 0) | |
559 | goto skip_stage; | |
560 | return; | |
561 | } | |
562 | ||
563 | ve = (struct victim_entry *)re; | |
564 | ||
565 | if (ve->mtime >= max_mtime || ve->mtime < min_mtime) | |
566 | goto skip_node; | |
567 | ||
568 | age = max_mtime - ve->mtime; | |
569 | ||
570 | vblocks = get_seg_entry(sbi, ve->segno)->ckpt_valid_blocks; | |
571 | f2fs_bug_on(sbi, !vblocks); | |
572 | ||
573 | /* rare case */ | |
574 | if (vblocks == seg_blocks) | |
575 | goto skip_node; | |
576 | ||
577 | iter++; | |
578 | ||
579 | age = max_mtime - abs(p->age - age); | |
580 | cost = UINT_MAX - vblocks; | |
581 | ||
582 | if (cost < p->min_cost || | |
583 | (cost == p->min_cost && age > p->oldest_age)) { | |
584 | p->min_cost = cost; | |
585 | p->oldest_age = age; | |
586 | p->min_segno = ve->segno; | |
587 | } | |
588 | skip_node: | |
589 | if (iter < dirty_threshold) { | |
590 | if (stage == 0) | |
591 | node = rb_prev(node); | |
592 | else if (stage == 1) | |
593 | node = rb_next(node); | |
594 | goto next_node; | |
595 | } | |
596 | skip_stage: | |
597 | if (stage < 1) { | |
598 | stage++; | |
599 | iter = 0; | |
600 | goto next_stage; | |
601 | } | |
602 | } | |
603 | static void lookup_victim_by_age(struct f2fs_sb_info *sbi, | |
604 | struct victim_sel_policy *p) | |
605 | { | |
606 | f2fs_bug_on(sbi, !f2fs_check_rb_tree_consistence(sbi, | |
607 | &sbi->am.root, true)); | |
608 | ||
609 | if (p->gc_mode == GC_AT) | |
610 | atgc_lookup_victim(sbi, p); | |
611 | else if (p->alloc_mode == AT_SSR) | |
612 | atssr_lookup_victim(sbi, p); | |
613 | else | |
614 | f2fs_bug_on(sbi, 1); | |
615 | } | |
616 | ||
617 | static void release_victim_entry(struct f2fs_sb_info *sbi) | |
618 | { | |
619 | struct atgc_management *am = &sbi->am; | |
620 | struct victim_entry *ve, *tmp; | |
621 | ||
622 | list_for_each_entry_safe(ve, tmp, &am->victim_list, list) { | |
623 | list_del(&ve->list); | |
624 | kmem_cache_free(victim_entry_slab, ve); | |
625 | am->victim_count--; | |
626 | } | |
627 | ||
628 | am->root = RB_ROOT_CACHED; | |
629 | ||
630 | f2fs_bug_on(sbi, am->victim_count); | |
631 | f2fs_bug_on(sbi, !list_empty(&am->victim_list)); | |
632 | } | |
633 | ||
0a8165d7 | 634 | /* |
111d2495 | 635 | * This function is called from two paths. |
7bc09003 JK |
636 | * One is garbage collection and the other is SSR segment selection. |
637 | * When it is called during GC, it just gets a victim segment | |
638 | * and it does not remove it from dirty seglist. | |
639 | * When it is called from SSR segment selection, it finds a segment | |
640 | * which has minimum valid blocks and removes it from dirty seglist. | |
641 | */ | |
642 | static int get_victim_by_default(struct f2fs_sb_info *sbi, | |
093749e2 CY |
643 | unsigned int *result, int gc_type, int type, |
644 | char alloc_mode, unsigned long long age) | |
7bc09003 JK |
645 | { |
646 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
e066b83c | 647 | struct sit_info *sm = SIT_I(sbi); |
7bc09003 | 648 | struct victim_sel_policy p; |
3fa56503 | 649 | unsigned int secno, last_victim; |
04f0b2ea | 650 | unsigned int last_segment; |
093749e2 CY |
651 | unsigned int nsearched; |
652 | bool is_atgc; | |
97767500 | 653 | int ret = 0; |
7bc09003 | 654 | |
210f41bc | 655 | mutex_lock(&dirty_i->seglist_lock); |
04f0b2ea | 656 | last_segment = MAIN_SECS(sbi) * sbi->segs_per_sec; |
210f41bc | 657 | |
7bc09003 | 658 | p.alloc_mode = alloc_mode; |
093749e2 CY |
659 | p.age = age; |
660 | p.age_threshold = sbi->am.age_threshold; | |
7bc09003 | 661 | |
093749e2 CY |
662 | retry: |
663 | select_policy(sbi, gc_type, type, &p); | |
7bc09003 | 664 | p.min_segno = NULL_SEGNO; |
093749e2 | 665 | p.oldest_age = 0; |
3fa56503 | 666 | p.min_cost = get_max_cost(sbi, &p); |
7bc09003 | 667 | |
093749e2 CY |
668 | is_atgc = (p.gc_mode == GC_AT || p.alloc_mode == AT_SSR); |
669 | nsearched = 0; | |
670 | ||
671 | if (is_atgc) | |
672 | SIT_I(sbi)->dirty_min_mtime = ULLONG_MAX; | |
673 | ||
e066b83c | 674 | if (*result != NULL_SEGNO) { |
97767500 QZ |
675 | if (!get_valid_blocks(sbi, *result, false)) { |
676 | ret = -ENODATA; | |
677 | goto out; | |
678 | } | |
679 | ||
680 | if (sec_usage_check(sbi, GET_SEC_FROM_SEG(sbi, *result))) | |
681 | ret = -EBUSY; | |
682 | else | |
e066b83c JK |
683 | p.min_segno = *result; |
684 | goto out; | |
685 | } | |
686 | ||
97767500 | 687 | ret = -ENODATA; |
3342bb30 CY |
688 | if (p.max_search == 0) |
689 | goto out; | |
690 | ||
e3080b01 CY |
691 | if (__is_large_section(sbi) && p.alloc_mode == LFS) { |
692 | if (sbi->next_victim_seg[BG_GC] != NULL_SEGNO) { | |
693 | p.min_segno = sbi->next_victim_seg[BG_GC]; | |
694 | *result = p.min_segno; | |
695 | sbi->next_victim_seg[BG_GC] = NULL_SEGNO; | |
696 | goto got_result; | |
697 | } | |
698 | if (gc_type == FG_GC && | |
699 | sbi->next_victim_seg[FG_GC] != NULL_SEGNO) { | |
700 | p.min_segno = sbi->next_victim_seg[FG_GC]; | |
701 | *result = p.min_segno; | |
702 | sbi->next_victim_seg[FG_GC] = NULL_SEGNO; | |
703 | goto got_result; | |
704 | } | |
705 | } | |
706 | ||
e066b83c | 707 | last_victim = sm->last_victim[p.gc_mode]; |
7bc09003 JK |
708 | if (p.alloc_mode == LFS && gc_type == FG_GC) { |
709 | p.min_segno = check_bg_victims(sbi); | |
710 | if (p.min_segno != NULL_SEGNO) | |
711 | goto got_it; | |
712 | } | |
713 | ||
714 | while (1) { | |
da52f8ad JQ |
715 | unsigned long cost, *dirty_bitmap; |
716 | unsigned int unit_no, segno; | |
717 | ||
718 | dirty_bitmap = p.dirty_bitmap; | |
719 | unit_no = find_next_bit(dirty_bitmap, | |
720 | last_segment / p.ofs_unit, | |
721 | p.offset / p.ofs_unit); | |
722 | segno = unit_no * p.ofs_unit; | |
a43f7ec3 | 723 | if (segno >= last_segment) { |
e066b83c JK |
724 | if (sm->last_victim[p.gc_mode]) { |
725 | last_segment = | |
726 | sm->last_victim[p.gc_mode]; | |
727 | sm->last_victim[p.gc_mode] = 0; | |
7bc09003 JK |
728 | p.offset = 0; |
729 | continue; | |
730 | } | |
731 | break; | |
732 | } | |
a57e564d JX |
733 | |
734 | p.offset = segno + p.ofs_unit; | |
da52f8ad | 735 | nsearched++; |
688159b6 | 736 | |
bbf9f7d9 ST |
737 | #ifdef CONFIG_F2FS_CHECK_FS |
738 | /* | |
739 | * skip selecting the invalid segno (that is failed due to block | |
740 | * validity check failure during GC) to avoid endless GC loop in | |
741 | * such cases. | |
742 | */ | |
743 | if (test_bit(segno, sm->invalid_segmap)) | |
744 | goto next; | |
745 | #endif | |
746 | ||
4ddb1a4d | 747 | secno = GET_SEC_FROM_SEG(sbi, segno); |
7bc09003 | 748 | |
5ec4e49f | 749 | if (sec_usage_check(sbi, secno)) |
688159b6 | 750 | goto next; |
61461fc9 | 751 | |
4354994f | 752 | /* Don't touch checkpointed data */ |
61461fc9 CY |
753 | if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) { |
754 | if (p.alloc_mode == LFS) { | |
755 | /* | |
756 | * LFS is set to find source section during GC. | |
757 | * The victim should have no checkpointed data. | |
758 | */ | |
759 | if (get_ckpt_valid_blocks(sbi, segno, true)) | |
760 | goto next; | |
761 | } else { | |
762 | /* | |
763 | * SSR | AT_SSR are set to find target segment | |
764 | * for writes which can be full by checkpointed | |
765 | * and newly written blocks. | |
766 | */ | |
767 | if (!f2fs_segment_has_free_slot(sbi, segno)) | |
768 | goto next; | |
769 | } | |
770 | } | |
771 | ||
5ec4e49f | 772 | if (gc_type == BG_GC && test_bit(secno, dirty_i->victim_secmap)) |
688159b6 | 773 | goto next; |
7bc09003 | 774 | |
093749e2 CY |
775 | if (is_atgc) { |
776 | add_victim_entry(sbi, &p, segno); | |
777 | goto next; | |
778 | } | |
779 | ||
7bc09003 JK |
780 | cost = get_gc_cost(sbi, segno, &p); |
781 | ||
782 | if (p.min_cost > cost) { | |
783 | p.min_segno = segno; | |
784 | p.min_cost = cost; | |
a57e564d | 785 | } |
688159b6 FL |
786 | next: |
787 | if (nsearched >= p.max_search) { | |
e066b83c | 788 | if (!sm->last_victim[p.gc_mode] && segno <= last_victim) |
da52f8ad JQ |
789 | sm->last_victim[p.gc_mode] = |
790 | last_victim + p.ofs_unit; | |
4ce53776 | 791 | else |
da52f8ad | 792 | sm->last_victim[p.gc_mode] = segno + p.ofs_unit; |
04f0b2ea QS |
793 | sm->last_victim[p.gc_mode] %= |
794 | (MAIN_SECS(sbi) * sbi->segs_per_sec); | |
7bc09003 JK |
795 | break; |
796 | } | |
797 | } | |
093749e2 CY |
798 | |
799 | /* get victim for GC_AT/AT_SSR */ | |
800 | if (is_atgc) { | |
801 | lookup_victim_by_age(sbi, &p); | |
802 | release_victim_entry(sbi); | |
803 | } | |
804 | ||
805 | if (is_atgc && p.min_segno == NULL_SEGNO && | |
806 | sm->elapsed_time < p.age_threshold) { | |
807 | p.age_threshold = 0; | |
808 | goto retry; | |
809 | } | |
810 | ||
7bc09003 | 811 | if (p.min_segno != NULL_SEGNO) { |
b2b3460a | 812 | got_it: |
e3080b01 CY |
813 | *result = (p.min_segno / p.ofs_unit) * p.ofs_unit; |
814 | got_result: | |
7bc09003 | 815 | if (p.alloc_mode == LFS) { |
4ddb1a4d | 816 | secno = GET_SEC_FROM_SEG(sbi, p.min_segno); |
5ec4e49f JK |
817 | if (gc_type == FG_GC) |
818 | sbi->cur_victim_sec = secno; | |
819 | else | |
820 | set_bit(secno, dirty_i->victim_secmap); | |
7bc09003 | 821 | } |
97767500 | 822 | ret = 0; |
8e46b3ed | 823 | |
e3c59108 ST |
824 | } |
825 | out: | |
826 | if (p.min_segno != NULL_SEGNO) | |
8e46b3ed NJ |
827 | trace_f2fs_get_victim(sbi->sb, type, gc_type, &p, |
828 | sbi->cur_victim_sec, | |
829 | prefree_segments(sbi), free_segments(sbi)); | |
7bc09003 JK |
830 | mutex_unlock(&dirty_i->seglist_lock); |
831 | ||
97767500 | 832 | return ret; |
7bc09003 JK |
833 | } |
834 | ||
835 | static const struct victim_selection default_v_ops = { | |
836 | .get_victim = get_victim_by_default, | |
837 | }; | |
838 | ||
7dda2af8 | 839 | static struct inode *find_gc_inode(struct gc_inode_list *gc_list, nid_t ino) |
7bc09003 | 840 | { |
7bc09003 JK |
841 | struct inode_entry *ie; |
842 | ||
7dda2af8 CL |
843 | ie = radix_tree_lookup(&gc_list->iroot, ino); |
844 | if (ie) | |
845 | return ie->inode; | |
7bc09003 JK |
846 | return NULL; |
847 | } | |
848 | ||
7dda2af8 | 849 | static void add_gc_inode(struct gc_inode_list *gc_list, struct inode *inode) |
7bc09003 | 850 | { |
6cc4af56 GZ |
851 | struct inode_entry *new_ie; |
852 | ||
7dda2af8 | 853 | if (inode == find_gc_inode(gc_list, inode->i_ino)) { |
6cc4af56 GZ |
854 | iput(inode); |
855 | return; | |
7bc09003 | 856 | } |
32410577 CY |
857 | new_ie = f2fs_kmem_cache_alloc(f2fs_inode_entry_slab, |
858 | GFP_NOFS, true, NULL); | |
7bc09003 | 859 | new_ie->inode = inode; |
f28e5034 CY |
860 | |
861 | f2fs_radix_tree_insert(&gc_list->iroot, inode->i_ino, new_ie); | |
7dda2af8 | 862 | list_add_tail(&new_ie->list, &gc_list->ilist); |
7bc09003 JK |
863 | } |
864 | ||
7dda2af8 | 865 | static void put_gc_inode(struct gc_inode_list *gc_list) |
7bc09003 JK |
866 | { |
867 | struct inode_entry *ie, *next_ie; | |
5f029c04 | 868 | |
7dda2af8 CL |
869 | list_for_each_entry_safe(ie, next_ie, &gc_list->ilist, list) { |
870 | radix_tree_delete(&gc_list->iroot, ie->inode->i_ino); | |
7bc09003 JK |
871 | iput(ie->inode); |
872 | list_del(&ie->list); | |
4d57b86d | 873 | kmem_cache_free(f2fs_inode_entry_slab, ie); |
7bc09003 JK |
874 | } |
875 | } | |
876 | ||
877 | static int check_valid_map(struct f2fs_sb_info *sbi, | |
878 | unsigned int segno, int offset) | |
879 | { | |
880 | struct sit_info *sit_i = SIT_I(sbi); | |
881 | struct seg_entry *sentry; | |
882 | int ret; | |
883 | ||
3d26fa6b | 884 | down_read(&sit_i->sentry_lock); |
7bc09003 JK |
885 | sentry = get_seg_entry(sbi, segno); |
886 | ret = f2fs_test_bit(offset, sentry->cur_valid_map); | |
3d26fa6b | 887 | up_read(&sit_i->sentry_lock); |
43727527 | 888 | return ret; |
7bc09003 JK |
889 | } |
890 | ||
0a8165d7 | 891 | /* |
7bc09003 JK |
892 | * This function compares node address got in summary with that in NAT. |
893 | * On validity, copy that node with cold status, otherwise (invalid node) | |
894 | * ignore that. | |
895 | */ | |
48018b4c | 896 | static int gc_node_segment(struct f2fs_sb_info *sbi, |
7bc09003 JK |
897 | struct f2fs_summary *sum, unsigned int segno, int gc_type) |
898 | { | |
7bc09003 | 899 | struct f2fs_summary *entry; |
26d58599 | 900 | block_t start_addr; |
7bc09003 | 901 | int off; |
7ea984b0 | 902 | int phase = 0; |
c29fd0c0 | 903 | bool fggc = (gc_type == FG_GC); |
48018b4c | 904 | int submitted = 0; |
de881df9 | 905 | unsigned int usable_blks_in_seg = f2fs_usable_blks_in_seg(sbi, segno); |
7bc09003 | 906 | |
26d58599 JK |
907 | start_addr = START_BLOCK(sbi, segno); |
908 | ||
7bc09003 JK |
909 | next_step: |
910 | entry = sum; | |
c718379b | 911 | |
c29fd0c0 CY |
912 | if (fggc && phase == 2) |
913 | atomic_inc(&sbi->wb_sync_req[NODE]); | |
914 | ||
de881df9 | 915 | for (off = 0; off < usable_blks_in_seg; off++, entry++) { |
7bc09003 JK |
916 | nid_t nid = le32_to_cpu(entry->nid); |
917 | struct page *node_page; | |
26d58599 | 918 | struct node_info ni; |
48018b4c | 919 | int err; |
7bc09003 | 920 | |
43727527 | 921 | /* stop BG_GC if there is not enough free sections. */ |
7f3037a5 | 922 | if (gc_type == BG_GC && has_not_enough_free_secs(sbi, 0, 0)) |
48018b4c | 923 | return submitted; |
7bc09003 | 924 | |
43727527 | 925 | if (check_valid_map(sbi, segno, off) == 0) |
7bc09003 JK |
926 | continue; |
927 | ||
7ea984b0 | 928 | if (phase == 0) { |
4d57b86d | 929 | f2fs_ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), 1, |
7ea984b0 CY |
930 | META_NAT, true); |
931 | continue; | |
932 | } | |
933 | ||
934 | if (phase == 1) { | |
4d57b86d | 935 | f2fs_ra_node_page(sbi, nid); |
7bc09003 JK |
936 | continue; |
937 | } | |
7ea984b0 CY |
938 | |
939 | /* phase == 2 */ | |
4d57b86d | 940 | node_page = f2fs_get_node_page(sbi, nid); |
7bc09003 JK |
941 | if (IS_ERR(node_page)) |
942 | continue; | |
943 | ||
4d57b86d | 944 | /* block may become invalid during f2fs_get_node_page */ |
9a01b56b HY |
945 | if (check_valid_map(sbi, segno, off) == 0) { |
946 | f2fs_put_page(node_page, 1); | |
947 | continue; | |
26d58599 JK |
948 | } |
949 | ||
7735730d CY |
950 | if (f2fs_get_node_info(sbi, nid, &ni)) { |
951 | f2fs_put_page(node_page, 1); | |
952 | continue; | |
953 | } | |
954 | ||
26d58599 JK |
955 | if (ni.blk_addr != start_addr + off) { |
956 | f2fs_put_page(node_page, 1); | |
957 | continue; | |
9a01b56b HY |
958 | } |
959 | ||
48018b4c CY |
960 | err = f2fs_move_node_page(node_page, gc_type); |
961 | if (!err && gc_type == FG_GC) | |
962 | submitted++; | |
e1235983 | 963 | stat_inc_node_blk_count(sbi, 1, gc_type); |
7bc09003 | 964 | } |
c718379b | 965 | |
7ea984b0 | 966 | if (++phase < 3) |
7bc09003 | 967 | goto next_step; |
c29fd0c0 CY |
968 | |
969 | if (fggc) | |
970 | atomic_dec(&sbi->wb_sync_req[NODE]); | |
48018b4c | 971 | return submitted; |
7bc09003 JK |
972 | } |
973 | ||
0a8165d7 | 974 | /* |
9af45ef5 JK |
975 | * Calculate start block index indicating the given node offset. |
976 | * Be careful, caller should give this node offset only indicating direct node | |
977 | * blocks. If any node offsets, which point the other types of node blocks such | |
978 | * as indirect or double indirect node blocks, are given, it must be a caller's | |
979 | * bug. | |
7bc09003 | 980 | */ |
4d57b86d | 981 | block_t f2fs_start_bidx_of_node(unsigned int node_ofs, struct inode *inode) |
7bc09003 | 982 | { |
ce19a5d4 JK |
983 | unsigned int indirect_blks = 2 * NIDS_PER_BLOCK + 4; |
984 | unsigned int bidx; | |
7bc09003 | 985 | |
ce19a5d4 JK |
986 | if (node_ofs == 0) |
987 | return 0; | |
7bc09003 | 988 | |
ce19a5d4 | 989 | if (node_ofs <= 2) { |
7bc09003 JK |
990 | bidx = node_ofs - 1; |
991 | } else if (node_ofs <= indirect_blks) { | |
ce19a5d4 | 992 | int dec = (node_ofs - 4) / (NIDS_PER_BLOCK + 1); |
5f029c04 | 993 | |
7bc09003 JK |
994 | bidx = node_ofs - 2 - dec; |
995 | } else { | |
ce19a5d4 | 996 | int dec = (node_ofs - indirect_blks - 3) / (NIDS_PER_BLOCK + 1); |
5f029c04 | 997 | |
7bc09003 JK |
998 | bidx = node_ofs - 5 - dec; |
999 | } | |
d02a6e61 | 1000 | return bidx * ADDRS_PER_BLOCK(inode) + ADDRS_PER_INODE(inode); |
7bc09003 JK |
1001 | } |
1002 | ||
c1079892 | 1003 | static bool is_alive(struct f2fs_sb_info *sbi, struct f2fs_summary *sum, |
7bc09003 JK |
1004 | struct node_info *dni, block_t blkaddr, unsigned int *nofs) |
1005 | { | |
1006 | struct page *node_page; | |
1007 | nid_t nid; | |
1008 | unsigned int ofs_in_node; | |
1009 | block_t source_blkaddr; | |
1010 | ||
1011 | nid = le32_to_cpu(sum->nid); | |
1012 | ofs_in_node = le16_to_cpu(sum->ofs_in_node); | |
1013 | ||
4d57b86d | 1014 | node_page = f2fs_get_node_page(sbi, nid); |
7bc09003 | 1015 | if (IS_ERR(node_page)) |
c1079892 | 1016 | return false; |
7bc09003 | 1017 | |
7735730d CY |
1018 | if (f2fs_get_node_info(sbi, nid, dni)) { |
1019 | f2fs_put_page(node_page, 1); | |
1020 | return false; | |
1021 | } | |
7bc09003 JK |
1022 | |
1023 | if (sum->version != dni->version) { | |
dcbb4c10 JP |
1024 | f2fs_warn(sbi, "%s: valid data with mismatched node version.", |
1025 | __func__); | |
c13ff37e | 1026 | set_sbi_flag(sbi, SBI_NEED_FSCK); |
7bc09003 JK |
1027 | } |
1028 | ||
1029 | *nofs = ofs_of_node(node_page); | |
a2ced1ce | 1030 | source_blkaddr = data_blkaddr(NULL, node_page, ofs_in_node); |
7bc09003 JK |
1031 | f2fs_put_page(node_page, 1); |
1032 | ||
bbf9f7d9 ST |
1033 | if (source_blkaddr != blkaddr) { |
1034 | #ifdef CONFIG_F2FS_CHECK_FS | |
1035 | unsigned int segno = GET_SEGNO(sbi, blkaddr); | |
1036 | unsigned long offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr); | |
1037 | ||
1038 | if (unlikely(check_valid_map(sbi, segno, offset))) { | |
1039 | if (!test_and_set_bit(segno, SIT_I(sbi)->invalid_segmap)) { | |
833dcd35 JP |
1040 | f2fs_err(sbi, "mismatched blkaddr %u (source_blkaddr %u) in seg %u", |
1041 | blkaddr, source_blkaddr, segno); | |
f6db4307 | 1042 | set_sbi_flag(sbi, SBI_NEED_FSCK); |
bbf9f7d9 ST |
1043 | } |
1044 | } | |
1045 | #endif | |
c1079892 | 1046 | return false; |
bbf9f7d9 | 1047 | } |
c1079892 | 1048 | return true; |
7bc09003 JK |
1049 | } |
1050 | ||
6aa58d8a CY |
1051 | static int ra_data_block(struct inode *inode, pgoff_t index) |
1052 | { | |
1053 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1054 | struct address_space *mapping = inode->i_mapping; | |
1055 | struct dnode_of_data dn; | |
1056 | struct page *page; | |
1057 | struct extent_info ei = {0, 0, 0}; | |
1058 | struct f2fs_io_info fio = { | |
1059 | .sbi = sbi, | |
1060 | .ino = inode->i_ino, | |
1061 | .type = DATA, | |
1062 | .temp = COLD, | |
1063 | .op = REQ_OP_READ, | |
1064 | .op_flags = 0, | |
1065 | .encrypted_page = NULL, | |
1066 | .in_list = false, | |
1067 | .retry = false, | |
1068 | }; | |
1069 | int err; | |
1070 | ||
1071 | page = f2fs_grab_cache_page(mapping, index, true); | |
1072 | if (!page) | |
1073 | return -ENOMEM; | |
1074 | ||
1075 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { | |
1076 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
93770ab7 CY |
1077 | if (unlikely(!f2fs_is_valid_blkaddr(sbi, dn.data_blkaddr, |
1078 | DATA_GENERIC_ENHANCE_READ))) { | |
10f966bb | 1079 | err = -EFSCORRUPTED; |
93770ab7 CY |
1080 | goto put_page; |
1081 | } | |
6aa58d8a CY |
1082 | goto got_it; |
1083 | } | |
1084 | ||
1085 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
1086 | err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE); | |
1087 | if (err) | |
1088 | goto put_page; | |
1089 | f2fs_put_dnode(&dn); | |
1090 | ||
93770ab7 CY |
1091 | if (!__is_valid_data_blkaddr(dn.data_blkaddr)) { |
1092 | err = -ENOENT; | |
1093 | goto put_page; | |
1094 | } | |
6aa58d8a | 1095 | if (unlikely(!f2fs_is_valid_blkaddr(sbi, dn.data_blkaddr, |
93770ab7 | 1096 | DATA_GENERIC_ENHANCE))) { |
10f966bb | 1097 | err = -EFSCORRUPTED; |
6aa58d8a CY |
1098 | goto put_page; |
1099 | } | |
1100 | got_it: | |
1101 | /* read page */ | |
1102 | fio.page = page; | |
1103 | fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr; | |
1104 | ||
9bf1a3f7 YS |
1105 | /* |
1106 | * don't cache encrypted data into meta inode until previous dirty | |
1107 | * data were writebacked to avoid racing between GC and flush. | |
1108 | */ | |
bae0ee7a | 1109 | f2fs_wait_on_page_writeback(page, DATA, true, true); |
9bf1a3f7 YS |
1110 | |
1111 | f2fs_wait_on_block_writeback(inode, dn.data_blkaddr); | |
1112 | ||
6aa58d8a CY |
1113 | fio.encrypted_page = f2fs_pagecache_get_page(META_MAPPING(sbi), |
1114 | dn.data_blkaddr, | |
1115 | FGP_LOCK | FGP_CREAT, GFP_NOFS); | |
1116 | if (!fio.encrypted_page) { | |
1117 | err = -ENOMEM; | |
1118 | goto put_page; | |
1119 | } | |
1120 | ||
1121 | err = f2fs_submit_page_bio(&fio); | |
1122 | if (err) | |
1123 | goto put_encrypted_page; | |
1124 | f2fs_put_page(fio.encrypted_page, 0); | |
1125 | f2fs_put_page(page, 1); | |
8b83ac81 CY |
1126 | |
1127 | f2fs_update_iostat(sbi, FS_DATA_READ_IO, F2FS_BLKSIZE); | |
9c122384 | 1128 | f2fs_update_iostat(sbi, FS_GDATA_READ_IO, F2FS_BLKSIZE); |
8b83ac81 | 1129 | |
6aa58d8a CY |
1130 | return 0; |
1131 | put_encrypted_page: | |
1132 | f2fs_put_page(fio.encrypted_page, 1); | |
1133 | put_page: | |
1134 | f2fs_put_page(page, 1); | |
1135 | return err; | |
1136 | } | |
1137 | ||
d4c759ee JK |
1138 | /* |
1139 | * Move data block via META_MAPPING while keeping locked data page. | |
1140 | * This can be used to move blocks, aka LBAs, directly on disk. | |
1141 | */ | |
48018b4c | 1142 | static int move_data_block(struct inode *inode, block_t bidx, |
2ef79ecb | 1143 | int gc_type, unsigned int segno, int off) |
4375a336 JK |
1144 | { |
1145 | struct f2fs_io_info fio = { | |
1146 | .sbi = F2FS_I_SB(inode), | |
39d787be | 1147 | .ino = inode->i_ino, |
4375a336 | 1148 | .type = DATA, |
a912b54d | 1149 | .temp = COLD, |
04d328de | 1150 | .op = REQ_OP_READ, |
70fd7614 | 1151 | .op_flags = 0, |
4375a336 | 1152 | .encrypted_page = NULL, |
fb830fc5 | 1153 | .in_list = false, |
fe16efe6 | 1154 | .retry = false, |
4375a336 JK |
1155 | }; |
1156 | struct dnode_of_data dn; | |
1157 | struct f2fs_summary sum; | |
1158 | struct node_info ni; | |
6aa58d8a | 1159 | struct page *page, *mpage; |
4356e48e | 1160 | block_t newaddr; |
48018b4c | 1161 | int err = 0; |
b0332a0f | 1162 | bool lfs_mode = f2fs_lfs_mode(fio.sbi); |
ac2d750b WG |
1163 | int type = fio.sbi->am.atgc_enabled && (gc_type == BG_GC) && |
1164 | (fio.sbi->gc_mode != GC_URGENT_HIGH) ? | |
093749e2 | 1165 | CURSEG_ALL_DATA_ATGC : CURSEG_COLD_DATA; |
4375a336 JK |
1166 | |
1167 | /* do not read out */ | |
a56c7c6f | 1168 | page = f2fs_grab_cache_page(inode->i_mapping, bidx, false); |
4375a336 | 1169 | if (!page) |
48018b4c | 1170 | return -ENOMEM; |
4375a336 | 1171 | |
48018b4c CY |
1172 | if (!check_valid_map(F2FS_I_SB(inode), segno, off)) { |
1173 | err = -ENOENT; | |
20614711 | 1174 | goto out; |
48018b4c | 1175 | } |
20614711 | 1176 | |
2ef79ecb CY |
1177 | if (f2fs_is_atomic_file(inode)) { |
1178 | F2FS_I(inode)->i_gc_failures[GC_FAILURE_ATOMIC]++; | |
1179 | F2FS_I_SB(inode)->skipped_atomic_files[gc_type]++; | |
48018b4c | 1180 | err = -EAGAIN; |
5fe45743 | 1181 | goto out; |
2ef79ecb | 1182 | } |
5fe45743 | 1183 | |
1ad71a27 JK |
1184 | if (f2fs_is_pinned_file(inode)) { |
1185 | f2fs_pin_file_control(inode, true); | |
48018b4c | 1186 | err = -EAGAIN; |
1ad71a27 JK |
1187 | goto out; |
1188 | } | |
1189 | ||
4375a336 | 1190 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
4d57b86d | 1191 | err = f2fs_get_dnode_of_data(&dn, bidx, LOOKUP_NODE); |
4375a336 JK |
1192 | if (err) |
1193 | goto out; | |
1194 | ||
08b39fbd CY |
1195 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
1196 | ClearPageUptodate(page); | |
48018b4c | 1197 | err = -ENOENT; |
4375a336 | 1198 | goto put_out; |
08b39fbd CY |
1199 | } |
1200 | ||
1201 | /* | |
1202 | * don't cache encrypted data into meta inode until previous dirty | |
1203 | * data were writebacked to avoid racing between GC and flush. | |
1204 | */ | |
bae0ee7a | 1205 | f2fs_wait_on_page_writeback(page, DATA, true, true); |
4375a336 | 1206 | |
9bf1a3f7 YS |
1207 | f2fs_wait_on_block_writeback(inode, dn.data_blkaddr); |
1208 | ||
7735730d CY |
1209 | err = f2fs_get_node_info(fio.sbi, dn.nid, &ni); |
1210 | if (err) | |
1211 | goto put_out; | |
1212 | ||
4375a336 JK |
1213 | /* read page */ |
1214 | fio.page = page; | |
7a9d7548 | 1215 | fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr; |
4375a336 | 1216 | |
107a805d CY |
1217 | if (lfs_mode) |
1218 | down_write(&fio.sbi->io_order_lock); | |
1219 | ||
543b8c46 JK |
1220 | mpage = f2fs_grab_cache_page(META_MAPPING(fio.sbi), |
1221 | fio.old_blkaddr, false); | |
d7cd3702 CY |
1222 | if (!mpage) { |
1223 | err = -ENOMEM; | |
543b8c46 | 1224 | goto up_out; |
d7cd3702 | 1225 | } |
543b8c46 JK |
1226 | |
1227 | fio.encrypted_page = mpage; | |
1228 | ||
1229 | /* read source block in mpage */ | |
1230 | if (!PageUptodate(mpage)) { | |
1231 | err = f2fs_submit_page_bio(&fio); | |
1232 | if (err) { | |
1233 | f2fs_put_page(mpage, 1); | |
1234 | goto up_out; | |
1235 | } | |
8b83ac81 CY |
1236 | |
1237 | f2fs_update_iostat(fio.sbi, FS_DATA_READ_IO, F2FS_BLKSIZE); | |
9c122384 | 1238 | f2fs_update_iostat(fio.sbi, FS_GDATA_READ_IO, F2FS_BLKSIZE); |
8b83ac81 | 1239 | |
543b8c46 JK |
1240 | lock_page(mpage); |
1241 | if (unlikely(mpage->mapping != META_MAPPING(fio.sbi) || | |
1242 | !PageUptodate(mpage))) { | |
1243 | err = -EIO; | |
1244 | f2fs_put_page(mpage, 1); | |
1245 | goto up_out; | |
1246 | } | |
1247 | } | |
1248 | ||
cf740403 CY |
1249 | set_summary(&sum, dn.nid, dn.ofs_in_node, ni.version); |
1250 | ||
1251 | /* allocate block address */ | |
4d57b86d | 1252 | f2fs_allocate_data_block(fio.sbi, NULL, fio.old_blkaddr, &newaddr, |
093749e2 | 1253 | &sum, type, NULL); |
4356e48e | 1254 | |
01eccef7 CY |
1255 | fio.encrypted_page = f2fs_pagecache_get_page(META_MAPPING(fio.sbi), |
1256 | newaddr, FGP_LOCK | FGP_CREAT, GFP_NOFS); | |
4356e48e CY |
1257 | if (!fio.encrypted_page) { |
1258 | err = -ENOMEM; | |
6aa58d8a | 1259 | f2fs_put_page(mpage, 1); |
543b8c46 | 1260 | goto recover_block; |
4356e48e | 1261 | } |
548aedac | 1262 | |
543b8c46 | 1263 | /* write target block */ |
bae0ee7a | 1264 | f2fs_wait_on_page_writeback(fio.encrypted_page, DATA, true, true); |
543b8c46 JK |
1265 | memcpy(page_address(fio.encrypted_page), |
1266 | page_address(mpage), PAGE_SIZE); | |
1267 | f2fs_put_page(mpage, 1); | |
1268 | invalidate_mapping_pages(META_MAPPING(fio.sbi), | |
1269 | fio.old_blkaddr, fio.old_blkaddr); | |
6ce19aff | 1270 | f2fs_invalidate_compress_page(fio.sbi, fio.old_blkaddr); |
543b8c46 | 1271 | |
8d64d365 | 1272 | set_page_dirty(fio.encrypted_page); |
6282adbf JK |
1273 | if (clear_page_dirty_for_io(fio.encrypted_page)) |
1274 | dec_page_count(fio.sbi, F2FS_DIRTY_META); | |
1275 | ||
548aedac | 1276 | set_page_writeback(fio.encrypted_page); |
17c50035 | 1277 | ClearPageError(page); |
4375a336 | 1278 | |
04d328de | 1279 | fio.op = REQ_OP_WRITE; |
70fd7614 | 1280 | fio.op_flags = REQ_SYNC; |
4356e48e | 1281 | fio.new_blkaddr = newaddr; |
fe16efe6 CY |
1282 | f2fs_submit_page_write(&fio); |
1283 | if (fio.retry) { | |
48018b4c | 1284 | err = -EAGAIN; |
a9d572c7 SY |
1285 | if (PageWriteback(fio.encrypted_page)) |
1286 | end_page_writeback(fio.encrypted_page); | |
1287 | goto put_page_out; | |
1288 | } | |
4375a336 | 1289 | |
b0af6d49 CY |
1290 | f2fs_update_iostat(fio.sbi, FS_GC_DATA_IO, F2FS_BLKSIZE); |
1291 | ||
f28b3434 | 1292 | f2fs_update_data_blkaddr(&dn, newaddr); |
91942321 | 1293 | set_inode_flag(inode, FI_APPEND_WRITE); |
4375a336 | 1294 | if (page->index == 0) |
91942321 | 1295 | set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN); |
548aedac | 1296 | put_page_out: |
4375a336 | 1297 | f2fs_put_page(fio.encrypted_page, 1); |
4356e48e CY |
1298 | recover_block: |
1299 | if (err) | |
4d57b86d | 1300 | f2fs_do_replace_block(fio.sbi, &sum, newaddr, fio.old_blkaddr, |
c5d02785 | 1301 | true, true, true); |
543b8c46 JK |
1302 | up_out: |
1303 | if (lfs_mode) | |
1304 | up_write(&fio.sbi->io_order_lock); | |
4375a336 JK |
1305 | put_out: |
1306 | f2fs_put_dnode(&dn); | |
1307 | out: | |
1308 | f2fs_put_page(page, 1); | |
48018b4c | 1309 | return err; |
4375a336 JK |
1310 | } |
1311 | ||
48018b4c | 1312 | static int move_data_page(struct inode *inode, block_t bidx, int gc_type, |
20614711 | 1313 | unsigned int segno, int off) |
7bc09003 | 1314 | { |
c879f90d | 1315 | struct page *page; |
48018b4c | 1316 | int err = 0; |
c879f90d | 1317 | |
4d57b86d | 1318 | page = f2fs_get_lock_data_page(inode, bidx, true); |
c879f90d | 1319 | if (IS_ERR(page)) |
48018b4c | 1320 | return PTR_ERR(page); |
63a0b7cb | 1321 | |
48018b4c CY |
1322 | if (!check_valid_map(F2FS_I_SB(inode), segno, off)) { |
1323 | err = -ENOENT; | |
20614711 | 1324 | goto out; |
48018b4c | 1325 | } |
20614711 | 1326 | |
2ef79ecb CY |
1327 | if (f2fs_is_atomic_file(inode)) { |
1328 | F2FS_I(inode)->i_gc_failures[GC_FAILURE_ATOMIC]++; | |
1329 | F2FS_I_SB(inode)->skipped_atomic_files[gc_type]++; | |
48018b4c | 1330 | err = -EAGAIN; |
5fe45743 | 1331 | goto out; |
2ef79ecb | 1332 | } |
1ad71a27 JK |
1333 | if (f2fs_is_pinned_file(inode)) { |
1334 | if (gc_type == FG_GC) | |
1335 | f2fs_pin_file_control(inode, true); | |
48018b4c | 1336 | err = -EAGAIN; |
1ad71a27 JK |
1337 | goto out; |
1338 | } | |
5fe45743 | 1339 | |
7bc09003 | 1340 | if (gc_type == BG_GC) { |
48018b4c CY |
1341 | if (PageWriteback(page)) { |
1342 | err = -EAGAIN; | |
4ebefc44 | 1343 | goto out; |
48018b4c | 1344 | } |
7bc09003 | 1345 | set_page_dirty(page); |
b763f3be | 1346 | set_page_private_gcing(page); |
7bc09003 | 1347 | } else { |
c879f90d JK |
1348 | struct f2fs_io_info fio = { |
1349 | .sbi = F2FS_I_SB(inode), | |
39d787be | 1350 | .ino = inode->i_ino, |
c879f90d | 1351 | .type = DATA, |
a912b54d | 1352 | .temp = COLD, |
04d328de | 1353 | .op = REQ_OP_WRITE, |
70fd7614 | 1354 | .op_flags = REQ_SYNC, |
e959c8f5 | 1355 | .old_blkaddr = NULL_ADDR, |
c879f90d | 1356 | .page = page, |
4375a336 | 1357 | .encrypted_page = NULL, |
cc15620b | 1358 | .need_lock = LOCK_REQ, |
b0af6d49 | 1359 | .io_type = FS_GC_DATA_IO, |
c879f90d | 1360 | }; |
72e1c797 | 1361 | bool is_dirty = PageDirty(page); |
72e1c797 CY |
1362 | |
1363 | retry: | |
bae0ee7a | 1364 | f2fs_wait_on_page_writeback(page, DATA, true, true); |
8d64d365 CY |
1365 | |
1366 | set_page_dirty(page); | |
933439c8 | 1367 | if (clear_page_dirty_for_io(page)) { |
a7ffdbe2 | 1368 | inode_dec_dirty_pages(inode); |
4d57b86d | 1369 | f2fs_remove_dirty_inode(inode); |
933439c8 | 1370 | } |
72e1c797 | 1371 | |
b763f3be | 1372 | set_page_private_gcing(page); |
72e1c797 | 1373 | |
4d57b86d | 1374 | err = f2fs_do_write_data_page(&fio); |
14a28559 | 1375 | if (err) { |
b763f3be | 1376 | clear_page_private_gcing(page); |
14a28559 | 1377 | if (err == -ENOMEM) { |
5df7731f CY |
1378 | congestion_wait(BLK_RW_ASYNC, |
1379 | DEFAULT_IO_TIMEOUT); | |
14a28559 CY |
1380 | goto retry; |
1381 | } | |
1382 | if (is_dirty) | |
1383 | set_page_dirty(page); | |
72e1c797 | 1384 | } |
7bc09003 JK |
1385 | } |
1386 | out: | |
1387 | f2fs_put_page(page, 1); | |
48018b4c | 1388 | return err; |
7bc09003 JK |
1389 | } |
1390 | ||
0a8165d7 | 1391 | /* |
7bc09003 JK |
1392 | * This function tries to get parent node of victim data block, and identifies |
1393 | * data block validity. If the block is valid, copy that with cold status and | |
1394 | * modify parent node. | |
1395 | * If the parent node is not valid or the data block address is different, | |
1396 | * the victim data block is ignored. | |
1397 | */ | |
48018b4c | 1398 | static int gc_data_segment(struct f2fs_sb_info *sbi, struct f2fs_summary *sum, |
7dede886 CY |
1399 | struct gc_inode_list *gc_list, unsigned int segno, int gc_type, |
1400 | bool force_migrate) | |
7bc09003 JK |
1401 | { |
1402 | struct super_block *sb = sbi->sb; | |
1403 | struct f2fs_summary *entry; | |
1404 | block_t start_addr; | |
43727527 | 1405 | int off; |
7bc09003 | 1406 | int phase = 0; |
48018b4c | 1407 | int submitted = 0; |
de881df9 | 1408 | unsigned int usable_blks_in_seg = f2fs_usable_blks_in_seg(sbi, segno); |
7bc09003 JK |
1409 | |
1410 | start_addr = START_BLOCK(sbi, segno); | |
1411 | ||
1412 | next_step: | |
1413 | entry = sum; | |
c718379b | 1414 | |
de881df9 | 1415 | for (off = 0; off < usable_blks_in_seg; off++, entry++) { |
7bc09003 JK |
1416 | struct page *data_page; |
1417 | struct inode *inode; | |
1418 | struct node_info dni; /* dnode info for the data */ | |
1419 | unsigned int ofs_in_node, nofs; | |
1420 | block_t start_bidx; | |
7ea984b0 | 1421 | nid_t nid = le32_to_cpu(entry->nid); |
7bc09003 | 1422 | |
803e74be JK |
1423 | /* |
1424 | * stop BG_GC if there is not enough free sections. | |
1425 | * Or, stop GC if the segment becomes fully valid caused by | |
1426 | * race condition along with SSR block allocation. | |
1427 | */ | |
1428 | if ((gc_type == BG_GC && has_not_enough_free_secs(sbi, 0, 0)) || | |
7dede886 CY |
1429 | (!force_migrate && get_valid_blocks(sbi, segno, true) == |
1430 | BLKS_PER_SEC(sbi))) | |
48018b4c | 1431 | return submitted; |
7bc09003 | 1432 | |
43727527 | 1433 | if (check_valid_map(sbi, segno, off) == 0) |
7bc09003 JK |
1434 | continue; |
1435 | ||
1436 | if (phase == 0) { | |
4d57b86d | 1437 | f2fs_ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), 1, |
7ea984b0 CY |
1438 | META_NAT, true); |
1439 | continue; | |
1440 | } | |
1441 | ||
1442 | if (phase == 1) { | |
4d57b86d | 1443 | f2fs_ra_node_page(sbi, nid); |
7bc09003 JK |
1444 | continue; |
1445 | } | |
1446 | ||
1447 | /* Get an inode by ino with checking validity */ | |
c1079892 | 1448 | if (!is_alive(sbi, entry, &dni, start_addr + off, &nofs)) |
7bc09003 JK |
1449 | continue; |
1450 | ||
7ea984b0 | 1451 | if (phase == 2) { |
4d57b86d | 1452 | f2fs_ra_node_page(sbi, dni.ino); |
7bc09003 JK |
1453 | continue; |
1454 | } | |
1455 | ||
7bc09003 JK |
1456 | ofs_in_node = le16_to_cpu(entry->ofs_in_node); |
1457 | ||
7ea984b0 | 1458 | if (phase == 3) { |
d4686d56 | 1459 | inode = f2fs_iget(sb, dni.ino); |
9056d648 CY |
1460 | if (IS_ERR(inode) || is_bad_inode(inode) || |
1461 | special_file(inode->i_mode)) | |
7bc09003 JK |
1462 | continue; |
1463 | ||
bb06664a | 1464 | if (!down_write_trylock( |
b2532c69 | 1465 | &F2FS_I(inode)->i_gc_rwsem[WRITE])) { |
bb06664a | 1466 | iput(inode); |
6f8d4455 | 1467 | sbi->skipped_gc_rwsem++; |
bb06664a CY |
1468 | continue; |
1469 | } | |
1470 | ||
6aa58d8a CY |
1471 | start_bidx = f2fs_start_bidx_of_node(nofs, inode) + |
1472 | ofs_in_node; | |
1473 | ||
1474 | if (f2fs_post_read_required(inode)) { | |
1475 | int err = ra_data_block(inode, start_bidx); | |
1476 | ||
1477 | up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); | |
1478 | if (err) { | |
1479 | iput(inode); | |
1480 | continue; | |
1481 | } | |
1482 | add_gc_inode(gc_list, inode); | |
1483 | continue; | |
1484 | } | |
1485 | ||
4d57b86d | 1486 | data_page = f2fs_get_read_data_page(inode, |
6aa58d8a | 1487 | start_bidx, REQ_RAHEAD, true); |
b2532c69 | 1488 | up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); |
31a32688 CL |
1489 | if (IS_ERR(data_page)) { |
1490 | iput(inode); | |
1491 | continue; | |
1492 | } | |
7bc09003 JK |
1493 | |
1494 | f2fs_put_page(data_page, 0); | |
7dda2af8 | 1495 | add_gc_inode(gc_list, inode); |
31a32688 CL |
1496 | continue; |
1497 | } | |
1498 | ||
7ea984b0 | 1499 | /* phase 4 */ |
7dda2af8 | 1500 | inode = find_gc_inode(gc_list, dni.ino); |
31a32688 | 1501 | if (inode) { |
82e0a5aa CY |
1502 | struct f2fs_inode_info *fi = F2FS_I(inode); |
1503 | bool locked = false; | |
48018b4c | 1504 | int err; |
82e0a5aa CY |
1505 | |
1506 | if (S_ISREG(inode->i_mode)) { | |
ad126ebd CY |
1507 | if (!down_write_trylock(&fi->i_gc_rwsem[READ])) { |
1508 | sbi->skipped_gc_rwsem++; | |
82e0a5aa | 1509 | continue; |
ad126ebd | 1510 | } |
82e0a5aa | 1511 | if (!down_write_trylock( |
b2532c69 | 1512 | &fi->i_gc_rwsem[WRITE])) { |
6f8d4455 | 1513 | sbi->skipped_gc_rwsem++; |
b2532c69 | 1514 | up_write(&fi->i_gc_rwsem[READ]); |
82e0a5aa CY |
1515 | continue; |
1516 | } | |
1517 | locked = true; | |
73ac2f4e CY |
1518 | |
1519 | /* wait for all inflight aio data */ | |
1520 | inode_dio_wait(inode); | |
82e0a5aa CY |
1521 | } |
1522 | ||
4d57b86d | 1523 | start_bidx = f2fs_start_bidx_of_node(nofs, inode) |
c879f90d | 1524 | + ofs_in_node; |
6dbb1796 | 1525 | if (f2fs_post_read_required(inode)) |
48018b4c CY |
1526 | err = move_data_block(inode, start_bidx, |
1527 | gc_type, segno, off); | |
4375a336 | 1528 | else |
48018b4c | 1529 | err = move_data_page(inode, start_bidx, gc_type, |
d4c759ee | 1530 | segno, off); |
82e0a5aa | 1531 | |
48018b4c CY |
1532 | if (!err && (gc_type == FG_GC || |
1533 | f2fs_post_read_required(inode))) | |
1534 | submitted++; | |
1535 | ||
82e0a5aa | 1536 | if (locked) { |
b2532c69 CY |
1537 | up_write(&fi->i_gc_rwsem[WRITE]); |
1538 | up_write(&fi->i_gc_rwsem[READ]); | |
82e0a5aa CY |
1539 | } |
1540 | ||
e1235983 | 1541 | stat_inc_data_blk_count(sbi, 1, gc_type); |
7bc09003 | 1542 | } |
7bc09003 | 1543 | } |
c718379b | 1544 | |
7ea984b0 | 1545 | if (++phase < 5) |
7bc09003 | 1546 | goto next_step; |
48018b4c CY |
1547 | |
1548 | return submitted; | |
7bc09003 JK |
1549 | } |
1550 | ||
1551 | static int __get_victim(struct f2fs_sb_info *sbi, unsigned int *victim, | |
8a2d0ace | 1552 | int gc_type) |
7bc09003 JK |
1553 | { |
1554 | struct sit_info *sit_i = SIT_I(sbi); | |
1555 | int ret; | |
8a2d0ace | 1556 | |
3d26fa6b | 1557 | down_write(&sit_i->sentry_lock); |
8a2d0ace | 1558 | ret = DIRTY_I(sbi)->v_ops->get_victim(sbi, victim, gc_type, |
093749e2 | 1559 | NO_CHECK_TYPE, LFS, 0); |
3d26fa6b | 1560 | up_write(&sit_i->sentry_lock); |
7bc09003 JK |
1561 | return ret; |
1562 | } | |
1563 | ||
718e53fa CY |
1564 | static int do_garbage_collect(struct f2fs_sb_info *sbi, |
1565 | unsigned int start_segno, | |
7dede886 CY |
1566 | struct gc_inode_list *gc_list, int gc_type, |
1567 | bool force_migrate) | |
7bc09003 JK |
1568 | { |
1569 | struct page *sum_page; | |
1570 | struct f2fs_summary_block *sum; | |
c718379b | 1571 | struct blk_plug plug; |
718e53fa CY |
1572 | unsigned int segno = start_segno; |
1573 | unsigned int end_segno = start_segno + sbi->segs_per_sec; | |
e3080b01 | 1574 | int seg_freed = 0, migrated = 0; |
718e53fa CY |
1575 | unsigned char type = IS_DATASEG(get_seg_entry(sbi, segno)->type) ? |
1576 | SUM_TYPE_DATA : SUM_TYPE_NODE; | |
48018b4c | 1577 | int submitted = 0; |
7bc09003 | 1578 | |
e3080b01 CY |
1579 | if (__is_large_section(sbi)) |
1580 | end_segno = rounddown(end_segno, sbi->segs_per_sec); | |
1581 | ||
de881df9 AR |
1582 | /* |
1583 | * zone-capacity can be less than zone-size in zoned devices, | |
1584 | * resulting in less than expected usable segments in the zone, | |
1585 | * calculate the end segno in the zone which can be garbage collected | |
1586 | */ | |
1587 | if (f2fs_sb_has_blkzoned(sbi)) | |
1588 | end_segno -= sbi->segs_per_sec - | |
1589 | f2fs_usable_segs_in_sec(sbi, segno); | |
1590 | ||
093749e2 CY |
1591 | sanity_check_seg_type(sbi, get_seg_entry(sbi, segno)->type); |
1592 | ||
718e53fa | 1593 | /* readahead multi ssa blocks those have contiguous address */ |
2c70c5e3 | 1594 | if (__is_large_section(sbi)) |
4d57b86d | 1595 | f2fs_ra_meta_pages(sbi, GET_SUM_BLOCK(sbi, segno), |
e3080b01 | 1596 | end_segno - segno, META_SSA, true); |
718e53fa CY |
1597 | |
1598 | /* reference all summary page */ | |
1599 | while (segno < end_segno) { | |
4d57b86d | 1600 | sum_page = f2fs_get_sum_page(sbi, segno++); |
edc55aaf JK |
1601 | if (IS_ERR(sum_page)) { |
1602 | int err = PTR_ERR(sum_page); | |
1603 | ||
1604 | end_segno = segno - 1; | |
1605 | for (segno = start_segno; segno < end_segno; segno++) { | |
1606 | sum_page = find_get_page(META_MAPPING(sbi), | |
1607 | GET_SUM_BLOCK(sbi, segno)); | |
1608 | f2fs_put_page(sum_page, 0); | |
1609 | f2fs_put_page(sum_page, 0); | |
1610 | } | |
1611 | return err; | |
1612 | } | |
718e53fa CY |
1613 | unlock_page(sum_page); |
1614 | } | |
7bc09003 | 1615 | |
c718379b JK |
1616 | blk_start_plug(&plug); |
1617 | ||
718e53fa | 1618 | for (segno = start_segno; segno < end_segno; segno++) { |
aa987273 | 1619 | |
718e53fa CY |
1620 | /* find segment summary of victim */ |
1621 | sum_page = find_get_page(META_MAPPING(sbi), | |
1622 | GET_SUM_BLOCK(sbi, segno)); | |
718e53fa | 1623 | f2fs_put_page(sum_page, 0); |
7bc09003 | 1624 | |
d6c66cd1 YS |
1625 | if (get_valid_blocks(sbi, segno, false) == 0) |
1626 | goto freed; | |
dabfbbc8 | 1627 | if (gc_type == BG_GC && __is_large_section(sbi) && |
e3080b01 CY |
1628 | migrated >= sbi->migration_granularity) |
1629 | goto skip; | |
d6c66cd1 | 1630 | if (!PageUptodate(sum_page) || unlikely(f2fs_cp_error(sbi))) |
e3080b01 | 1631 | goto skip; |
de0dcc40 | 1632 | |
718e53fa | 1633 | sum = page_address(sum_page); |
10d255c3 | 1634 | if (type != GET_SUM_TYPE((&sum->footer))) { |
dcbb4c10 JP |
1635 | f2fs_err(sbi, "Inconsistent segment (%u) type [%d, %d] in SSA and SIT", |
1636 | segno, type, GET_SUM_TYPE((&sum->footer))); | |
10d255c3 | 1637 | set_sbi_flag(sbi, SBI_NEED_FSCK); |
793ab1c8 | 1638 | f2fs_stop_checkpoint(sbi, false); |
e3080b01 | 1639 | goto skip; |
10d255c3 | 1640 | } |
718e53fa CY |
1641 | |
1642 | /* | |
1643 | * this is to avoid deadlock: | |
1644 | * - lock_page(sum_page) - f2fs_replace_block | |
3d26fa6b CY |
1645 | * - check_valid_map() - down_write(sentry_lock) |
1646 | * - down_read(sentry_lock) - change_curseg() | |
718e53fa CY |
1647 | * - lock_page(sum_page) |
1648 | */ | |
718e53fa | 1649 | if (type == SUM_TYPE_NODE) |
48018b4c | 1650 | submitted += gc_node_segment(sbi, sum->entries, segno, |
718e53fa | 1651 | gc_type); |
48018b4c CY |
1652 | else |
1653 | submitted += gc_data_segment(sbi, sum->entries, gc_list, | |
7dede886 CY |
1654 | segno, gc_type, |
1655 | force_migrate); | |
718e53fa CY |
1656 | |
1657 | stat_inc_seg_count(sbi, type, gc_type); | |
07c6b593 | 1658 | sbi->gc_reclaimed_segs[sbi->gc_mode]++; |
8c7b9ac1 | 1659 | migrated++; |
c56f16da | 1660 | |
d6c66cd1 | 1661 | freed: |
c56f16da CY |
1662 | if (gc_type == FG_GC && |
1663 | get_valid_blocks(sbi, segno, false) == 0) | |
1664 | seg_freed++; | |
e3080b01 CY |
1665 | |
1666 | if (__is_large_section(sbi) && segno + 1 < end_segno) | |
1667 | sbi->next_victim_seg[gc_type] = segno + 1; | |
1668 | skip: | |
718e53fa CY |
1669 | f2fs_put_page(sum_page, 0); |
1670 | } | |
1671 | ||
48018b4c | 1672 | if (submitted) |
b9109b0e JK |
1673 | f2fs_submit_merged_write(sbi, |
1674 | (type == SUM_TYPE_NODE) ? NODE : DATA); | |
c718379b | 1675 | |
718e53fa | 1676 | blk_finish_plug(&plug); |
7bc09003 | 1677 | |
17d899df CY |
1678 | stat_inc_call_count(sbi->stat_info); |
1679 | ||
c56f16da | 1680 | return seg_freed; |
7bc09003 JK |
1681 | } |
1682 | ||
e066b83c | 1683 | int f2fs_gc(struct f2fs_sb_info *sbi, bool sync, |
7dede886 | 1684 | bool background, bool force, unsigned int segno) |
7bc09003 | 1685 | { |
d530d4d8 | 1686 | int gc_type = sync ? FG_GC : BG_GC; |
c56f16da CY |
1687 | int sec_freed = 0, seg_freed = 0, total_freed = 0; |
1688 | int ret = 0; | |
d5053a34 | 1689 | struct cp_control cpc; |
e066b83c | 1690 | unsigned int init_segno = segno; |
7dda2af8 CL |
1691 | struct gc_inode_list gc_list = { |
1692 | .ilist = LIST_HEAD_INIT(gc_list.ilist), | |
f6bb2a2c | 1693 | .iroot = RADIX_TREE_INIT(gc_list.iroot, GFP_NOFS), |
7dda2af8 | 1694 | }; |
2ef79ecb | 1695 | unsigned long long last_skipped = sbi->skipped_atomic_files[FG_GC]; |
6f8d4455 | 1696 | unsigned long long first_skipped; |
2ef79ecb | 1697 | unsigned int skipped_round = 0, round = 0; |
d5053a34 | 1698 | |
c56f16da CY |
1699 | trace_f2fs_gc_begin(sbi->sb, sync, background, |
1700 | get_pages(sbi, F2FS_DIRTY_NODES), | |
1701 | get_pages(sbi, F2FS_DIRTY_DENTS), | |
1702 | get_pages(sbi, F2FS_DIRTY_IMETA), | |
1703 | free_sections(sbi), | |
1704 | free_segments(sbi), | |
1705 | reserved_segments(sbi), | |
1706 | prefree_segments(sbi)); | |
1707 | ||
119ee914 | 1708 | cpc.reason = __get_cp_reason(sbi); |
6f8d4455 JK |
1709 | sbi->skipped_gc_rwsem = 0; |
1710 | first_skipped = last_skipped; | |
7bc09003 | 1711 | gc_more: |
1751e8a6 | 1712 | if (unlikely(!(sbi->sb->s_flags & SB_ACTIVE))) { |
e5dbd956 | 1713 | ret = -EINVAL; |
408e9375 | 1714 | goto stop; |
e5dbd956 | 1715 | } |
6d5a1495 CY |
1716 | if (unlikely(f2fs_cp_error(sbi))) { |
1717 | ret = -EIO; | |
203681f6 | 1718 | goto stop; |
6d5a1495 | 1719 | } |
7bc09003 | 1720 | |
19f4e688 | 1721 | if (gc_type == BG_GC && has_not_enough_free_secs(sbi, 0, 0)) { |
6e17bfbc | 1722 | /* |
19f4e688 HP |
1723 | * For example, if there are many prefree_segments below given |
1724 | * threshold, we can make them free by checkpoint. Then, we | |
1725 | * secure free segments which doesn't need fggc any more. | |
6e17bfbc | 1726 | */ |
4354994f DR |
1727 | if (prefree_segments(sbi) && |
1728 | !is_sbi_flag_set(sbi, SBI_CP_DISABLED)) { | |
4d57b86d | 1729 | ret = f2fs_write_checkpoint(sbi, &cpc); |
8fd5a37e JK |
1730 | if (ret) |
1731 | goto stop; | |
1732 | } | |
19f4e688 HP |
1733 | if (has_not_enough_free_secs(sbi, 0, 0)) |
1734 | gc_type = FG_GC; | |
d64f8047 | 1735 | } |
7bc09003 | 1736 | |
19f4e688 | 1737 | /* f2fs_balance_fs doesn't need to do BG_GC in critical path. */ |
c56f16da CY |
1738 | if (gc_type == BG_GC && !background) { |
1739 | ret = -EINVAL; | |
19f4e688 | 1740 | goto stop; |
c56f16da | 1741 | } |
97767500 QZ |
1742 | ret = __get_victim(sbi, &segno, gc_type); |
1743 | if (ret) | |
408e9375 | 1744 | goto stop; |
7bc09003 | 1745 | |
7dede886 | 1746 | seg_freed = do_garbage_collect(sbi, segno, &gc_list, gc_type, force); |
de881df9 AR |
1747 | if (gc_type == FG_GC && |
1748 | seg_freed == f2fs_usable_segs_in_sec(sbi, segno)) | |
45fe8492 | 1749 | sec_freed++; |
c56f16da | 1750 | total_freed += seg_freed; |
43727527 | 1751 | |
2ef79ecb | 1752 | if (gc_type == FG_GC) { |
6f8d4455 JK |
1753 | if (sbi->skipped_atomic_files[FG_GC] > last_skipped || |
1754 | sbi->skipped_gc_rwsem) | |
2ef79ecb CY |
1755 | skipped_round++; |
1756 | last_skipped = sbi->skipped_atomic_files[FG_GC]; | |
1757 | round++; | |
1758 | } | |
1759 | ||
10d0786b | 1760 | if (gc_type == FG_GC) |
5ec4e49f | 1761 | sbi->cur_victim_sec = NULL_SEGNO; |
43727527 | 1762 | |
6f8d4455 JK |
1763 | if (sync) |
1764 | goto stop; | |
1765 | ||
1766 | if (has_not_enough_free_secs(sbi, sec_freed, 0)) { | |
1767 | if (skipped_round <= MAX_SKIP_GC_COUNT || | |
1768 | skipped_round * 2 < round) { | |
e066b83c | 1769 | segno = NULL_SEGNO; |
d530d4d8 | 1770 | goto gc_more; |
e066b83c | 1771 | } |
43727527 | 1772 | |
6f8d4455 JK |
1773 | if (first_skipped < last_skipped && |
1774 | (last_skipped - first_skipped) > | |
1775 | sbi->skipped_gc_rwsem) { | |
1776 | f2fs_drop_inmem_pages_all(sbi, true); | |
1777 | segno = NULL_SEGNO; | |
1778 | goto gc_more; | |
1779 | } | |
4354994f | 1780 | if (gc_type == FG_GC && !is_sbi_flag_set(sbi, SBI_CP_DISABLED)) |
4d57b86d | 1781 | ret = f2fs_write_checkpoint(sbi, &cpc); |
d530d4d8 | 1782 | } |
408e9375 | 1783 | stop: |
e066b83c JK |
1784 | SIT_I(sbi)->last_victim[ALLOC_NEXT] = 0; |
1785 | SIT_I(sbi)->last_victim[FLUSH_DEVICE] = init_segno; | |
c56f16da CY |
1786 | |
1787 | trace_f2fs_gc_end(sbi->sb, ret, total_freed, sec_freed, | |
1788 | get_pages(sbi, F2FS_DIRTY_NODES), | |
1789 | get_pages(sbi, F2FS_DIRTY_DENTS), | |
1790 | get_pages(sbi, F2FS_DIRTY_IMETA), | |
1791 | free_sections(sbi), | |
1792 | free_segments(sbi), | |
1793 | reserved_segments(sbi), | |
1794 | prefree_segments(sbi)); | |
1795 | ||
fb24fea7 | 1796 | up_write(&sbi->gc_lock); |
7bc09003 | 1797 | |
7dda2af8 | 1798 | put_gc_inode(&gc_list); |
d530d4d8 | 1799 | |
61f7725a | 1800 | if (sync && !ret) |
d530d4d8 | 1801 | ret = sec_freed ? 0 : -EAGAIN; |
43727527 | 1802 | return ret; |
7bc09003 JK |
1803 | } |
1804 | ||
093749e2 CY |
1805 | int __init f2fs_create_garbage_collection_cache(void) |
1806 | { | |
1807 | victim_entry_slab = f2fs_kmem_cache_create("f2fs_victim_entry", | |
1808 | sizeof(struct victim_entry)); | |
1809 | if (!victim_entry_slab) | |
1810 | return -ENOMEM; | |
1811 | return 0; | |
1812 | } | |
1813 | ||
1814 | void f2fs_destroy_garbage_collection_cache(void) | |
1815 | { | |
1816 | kmem_cache_destroy(victim_entry_slab); | |
1817 | } | |
1818 | ||
1819 | static void init_atgc_management(struct f2fs_sb_info *sbi) | |
1820 | { | |
1821 | struct atgc_management *am = &sbi->am; | |
1822 | ||
1823 | if (test_opt(sbi, ATGC) && | |
1824 | SIT_I(sbi)->elapsed_time >= DEF_GC_THREAD_AGE_THRESHOLD) | |
1825 | am->atgc_enabled = true; | |
1826 | ||
1827 | am->root = RB_ROOT_CACHED; | |
1828 | INIT_LIST_HEAD(&am->victim_list); | |
1829 | am->victim_count = 0; | |
1830 | ||
1831 | am->candidate_ratio = DEF_GC_THREAD_CANDIDATE_RATIO; | |
1832 | am->max_candidate_count = DEF_GC_THREAD_MAX_CANDIDATE_COUNT; | |
1833 | am->age_weight = DEF_GC_THREAD_AGE_WEIGHT; | |
89e53ff1 | 1834 | am->age_threshold = DEF_GC_THREAD_AGE_THRESHOLD; |
093749e2 CY |
1835 | } |
1836 | ||
4d57b86d | 1837 | void f2fs_build_gc_manager(struct f2fs_sb_info *sbi) |
7bc09003 JK |
1838 | { |
1839 | DIRTY_I(sbi)->v_ops = &default_v_ops; | |
e93b9865 | 1840 | |
1ad71a27 | 1841 | sbi->gc_pin_file_threshold = DEF_GC_FAILED_PINNED_FILES; |
d5793249 JK |
1842 | |
1843 | /* give warm/cold data area from slower device */ | |
0916878d | 1844 | if (f2fs_is_multi_device(sbi) && !__is_large_section(sbi)) |
d5793249 JK |
1845 | SIT_I(sbi)->last_victim[ALLOC_NEXT] = |
1846 | GET_SEGNO(sbi, FDEV(0).end_blk) + 1; | |
093749e2 CY |
1847 | |
1848 | init_atgc_management(sbi); | |
7bc09003 | 1849 | } |
04f0b2ea | 1850 | |
b4b10061 JK |
1851 | static int free_segment_range(struct f2fs_sb_info *sbi, |
1852 | unsigned int secs, bool gc_only) | |
04f0b2ea | 1853 | { |
b4b10061 JK |
1854 | unsigned int segno, next_inuse, start, end; |
1855 | struct cp_control cpc = { CP_RESIZE, 0, 0, 0 }; | |
1856 | int gc_mode, gc_type; | |
04f0b2ea | 1857 | int err = 0; |
b4b10061 JK |
1858 | int type; |
1859 | ||
1860 | /* Force block allocation for GC */ | |
1861 | MAIN_SECS(sbi) -= secs; | |
1862 | start = MAIN_SECS(sbi) * sbi->segs_per_sec; | |
1863 | end = MAIN_SEGS(sbi) - 1; | |
1864 | ||
1865 | mutex_lock(&DIRTY_I(sbi)->seglist_lock); | |
1866 | for (gc_mode = 0; gc_mode < MAX_GC_POLICY; gc_mode++) | |
1867 | if (SIT_I(sbi)->last_victim[gc_mode] >= start) | |
1868 | SIT_I(sbi)->last_victim[gc_mode] = 0; | |
1869 | ||
1870 | for (gc_type = BG_GC; gc_type <= FG_GC; gc_type++) | |
1871 | if (sbi->next_victim_seg[gc_type] >= start) | |
1872 | sbi->next_victim_seg[gc_type] = NULL_SEGNO; | |
1873 | mutex_unlock(&DIRTY_I(sbi)->seglist_lock); | |
04f0b2ea QS |
1874 | |
1875 | /* Move out cursegs from the target range */ | |
d0b9e42a | 1876 | for (type = CURSEG_HOT_DATA; type < NR_CURSEG_PERSIST_TYPE; type++) |
0ef81833 | 1877 | f2fs_allocate_segment_for_resize(sbi, type, start, end); |
04f0b2ea QS |
1878 | |
1879 | /* do GC to move out valid blocks in the range */ | |
1880 | for (segno = start; segno <= end; segno += sbi->segs_per_sec) { | |
1881 | struct gc_inode_list gc_list = { | |
1882 | .ilist = LIST_HEAD_INIT(gc_list.ilist), | |
1883 | .iroot = RADIX_TREE_INIT(gc_list.iroot, GFP_NOFS), | |
1884 | }; | |
1885 | ||
7dede886 | 1886 | do_garbage_collect(sbi, segno, &gc_list, FG_GC, true); |
04f0b2ea QS |
1887 | put_gc_inode(&gc_list); |
1888 | ||
b4b10061 JK |
1889 | if (!gc_only && get_valid_blocks(sbi, segno, true)) { |
1890 | err = -EAGAIN; | |
1891 | goto out; | |
1892 | } | |
1893 | if (fatal_signal_pending(current)) { | |
1894 | err = -ERESTARTSYS; | |
1895 | goto out; | |
1896 | } | |
04f0b2ea | 1897 | } |
b4b10061 JK |
1898 | if (gc_only) |
1899 | goto out; | |
04f0b2ea | 1900 | |
b4b10061 | 1901 | err = f2fs_write_checkpoint(sbi, &cpc); |
04f0b2ea | 1902 | if (err) |
b4b10061 | 1903 | goto out; |
04f0b2ea QS |
1904 | |
1905 | next_inuse = find_next_inuse(FREE_I(sbi), end + 1, start); | |
1906 | if (next_inuse <= end) { | |
dcbb4c10 JP |
1907 | f2fs_err(sbi, "segno %u should be free but still inuse!", |
1908 | next_inuse); | |
04f0b2ea QS |
1909 | f2fs_bug_on(sbi, 1); |
1910 | } | |
b4b10061 JK |
1911 | out: |
1912 | MAIN_SECS(sbi) += secs; | |
04f0b2ea QS |
1913 | return err; |
1914 | } | |
1915 | ||
1916 | static void update_sb_metadata(struct f2fs_sb_info *sbi, int secs) | |
1917 | { | |
1918 | struct f2fs_super_block *raw_sb = F2FS_RAW_SUPER(sbi); | |
a4ba5dfc CY |
1919 | int section_count; |
1920 | int segment_count; | |
1921 | int segment_count_main; | |
1922 | long long block_count; | |
04f0b2ea QS |
1923 | int segs = secs * sbi->segs_per_sec; |
1924 | ||
a4ba5dfc CY |
1925 | down_write(&sbi->sb_lock); |
1926 | ||
1927 | section_count = le32_to_cpu(raw_sb->section_count); | |
1928 | segment_count = le32_to_cpu(raw_sb->segment_count); | |
1929 | segment_count_main = le32_to_cpu(raw_sb->segment_count_main); | |
1930 | block_count = le64_to_cpu(raw_sb->block_count); | |
1931 | ||
04f0b2ea QS |
1932 | raw_sb->section_count = cpu_to_le32(section_count + secs); |
1933 | raw_sb->segment_count = cpu_to_le32(segment_count + segs); | |
1934 | raw_sb->segment_count_main = cpu_to_le32(segment_count_main + segs); | |
1935 | raw_sb->block_count = cpu_to_le64(block_count + | |
1936 | (long long)segs * sbi->blocks_per_seg); | |
46d9ce19 QS |
1937 | if (f2fs_is_multi_device(sbi)) { |
1938 | int last_dev = sbi->s_ndevs - 1; | |
1939 | int dev_segs = | |
1940 | le32_to_cpu(raw_sb->devs[last_dev].total_segments); | |
1941 | ||
1942 | raw_sb->devs[last_dev].total_segments = | |
1943 | cpu_to_le32(dev_segs + segs); | |
1944 | } | |
a4ba5dfc CY |
1945 | |
1946 | up_write(&sbi->sb_lock); | |
04f0b2ea QS |
1947 | } |
1948 | ||
1949 | static void update_fs_metadata(struct f2fs_sb_info *sbi, int secs) | |
1950 | { | |
1951 | int segs = secs * sbi->segs_per_sec; | |
46d9ce19 | 1952 | long long blks = (long long)segs * sbi->blocks_per_seg; |
04f0b2ea QS |
1953 | long long user_block_count = |
1954 | le64_to_cpu(F2FS_CKPT(sbi)->user_block_count); | |
1955 | ||
1956 | SM_I(sbi)->segment_count = (int)SM_I(sbi)->segment_count + segs; | |
1957 | MAIN_SEGS(sbi) = (int)MAIN_SEGS(sbi) + segs; | |
b4b10061 | 1958 | MAIN_SECS(sbi) += secs; |
04f0b2ea QS |
1959 | FREE_I(sbi)->free_sections = (int)FREE_I(sbi)->free_sections + secs; |
1960 | FREE_I(sbi)->free_segments = (int)FREE_I(sbi)->free_segments + segs; | |
46d9ce19 QS |
1961 | F2FS_CKPT(sbi)->user_block_count = cpu_to_le64(user_block_count + blks); |
1962 | ||
1963 | if (f2fs_is_multi_device(sbi)) { | |
1964 | int last_dev = sbi->s_ndevs - 1; | |
1965 | ||
1966 | FDEV(last_dev).total_segments = | |
1967 | (int)FDEV(last_dev).total_segments + segs; | |
1968 | FDEV(last_dev).end_blk = | |
1969 | (long long)FDEV(last_dev).end_blk + blks; | |
1970 | #ifdef CONFIG_BLK_DEV_ZONED | |
1971 | FDEV(last_dev).nr_blkz = (int)FDEV(last_dev).nr_blkz + | |
1972 | (int)(blks >> sbi->log_blocks_per_blkz); | |
1973 | #endif | |
1974 | } | |
04f0b2ea QS |
1975 | } |
1976 | ||
1977 | int f2fs_resize_fs(struct f2fs_sb_info *sbi, __u64 block_count) | |
1978 | { | |
1979 | __u64 old_block_count, shrunk_blocks; | |
b4b10061 | 1980 | struct cp_control cpc = { CP_RESIZE, 0, 0, 0 }; |
04f0b2ea | 1981 | unsigned int secs; |
04f0b2ea QS |
1982 | int err = 0; |
1983 | __u32 rem; | |
1984 | ||
1985 | old_block_count = le64_to_cpu(F2FS_RAW_SUPER(sbi)->block_count); | |
1986 | if (block_count > old_block_count) | |
1987 | return -EINVAL; | |
1988 | ||
46d9ce19 QS |
1989 | if (f2fs_is_multi_device(sbi)) { |
1990 | int last_dev = sbi->s_ndevs - 1; | |
1991 | __u64 last_segs = FDEV(last_dev).total_segments; | |
1992 | ||
1993 | if (block_count + last_segs * sbi->blocks_per_seg <= | |
1994 | old_block_count) | |
1995 | return -EINVAL; | |
1996 | } | |
1997 | ||
04f0b2ea QS |
1998 | /* new fs size should align to section size */ |
1999 | div_u64_rem(block_count, BLKS_PER_SEC(sbi), &rem); | |
2000 | if (rem) | |
2001 | return -EINVAL; | |
2002 | ||
2003 | if (block_count == old_block_count) | |
2004 | return 0; | |
2005 | ||
2006 | if (is_sbi_flag_set(sbi, SBI_NEED_FSCK)) { | |
dcbb4c10 | 2007 | f2fs_err(sbi, "Should run fsck to repair first."); |
10f966bb | 2008 | return -EFSCORRUPTED; |
04f0b2ea QS |
2009 | } |
2010 | ||
2011 | if (test_opt(sbi, DISABLE_CHECKPOINT)) { | |
dcbb4c10 | 2012 | f2fs_err(sbi, "Checkpoint should be enabled."); |
04f0b2ea QS |
2013 | return -EINVAL; |
2014 | } | |
2015 | ||
04f0b2ea QS |
2016 | shrunk_blocks = old_block_count - block_count; |
2017 | secs = div_u64(shrunk_blocks, BLKS_PER_SEC(sbi)); | |
b4b10061 JK |
2018 | |
2019 | /* stop other GC */ | |
2020 | if (!down_write_trylock(&sbi->gc_lock)) | |
2021 | return -EAGAIN; | |
2022 | ||
2023 | /* stop CP to protect MAIN_SEC in free_segment_range */ | |
2024 | f2fs_lock_op(sbi); | |
3ab0598e CY |
2025 | |
2026 | spin_lock(&sbi->stat_lock); | |
2027 | if (shrunk_blocks + valid_user_blocks(sbi) + | |
2028 | sbi->current_reserved_blocks + sbi->unusable_block_count + | |
2029 | F2FS_OPTION(sbi).root_reserved_blocks > sbi->user_block_count) | |
2030 | err = -ENOSPC; | |
2031 | spin_unlock(&sbi->stat_lock); | |
2032 | ||
2033 | if (err) | |
2034 | goto out_unlock; | |
2035 | ||
b4b10061 | 2036 | err = free_segment_range(sbi, secs, true); |
3ab0598e CY |
2037 | |
2038 | out_unlock: | |
b4b10061 JK |
2039 | f2fs_unlock_op(sbi); |
2040 | up_write(&sbi->gc_lock); | |
2041 | if (err) | |
2042 | return err; | |
2043 | ||
2044 | set_sbi_flag(sbi, SBI_IS_RESIZEFS); | |
2045 | ||
2046 | freeze_super(sbi->sb); | |
2047 | down_write(&sbi->gc_lock); | |
8769918b | 2048 | down_write(&sbi->cp_global_sem); |
b4b10061 | 2049 | |
04f0b2ea QS |
2050 | spin_lock(&sbi->stat_lock); |
2051 | if (shrunk_blocks + valid_user_blocks(sbi) + | |
2052 | sbi->current_reserved_blocks + sbi->unusable_block_count + | |
2053 | F2FS_OPTION(sbi).root_reserved_blocks > sbi->user_block_count) | |
2054 | err = -ENOSPC; | |
2055 | else | |
2056 | sbi->user_block_count -= shrunk_blocks; | |
2057 | spin_unlock(&sbi->stat_lock); | |
b4b10061 JK |
2058 | if (err) |
2059 | goto out_err; | |
04f0b2ea | 2060 | |
b4b10061 | 2061 | err = free_segment_range(sbi, secs, false); |
04f0b2ea | 2062 | if (err) |
b4b10061 | 2063 | goto recover_out; |
04f0b2ea QS |
2064 | |
2065 | update_sb_metadata(sbi, -secs); | |
2066 | ||
2067 | err = f2fs_commit_super(sbi, false); | |
2068 | if (err) { | |
2069 | update_sb_metadata(sbi, secs); | |
b4b10061 | 2070 | goto recover_out; |
04f0b2ea QS |
2071 | } |
2072 | ||
2073 | update_fs_metadata(sbi, -secs); | |
2074 | clear_sbi_flag(sbi, SBI_IS_RESIZEFS); | |
68275682 | 2075 | set_sbi_flag(sbi, SBI_IS_DIRTY); |
68275682 | 2076 | |
b4b10061 | 2077 | err = f2fs_write_checkpoint(sbi, &cpc); |
04f0b2ea QS |
2078 | if (err) { |
2079 | update_fs_metadata(sbi, secs); | |
2080 | update_sb_metadata(sbi, secs); | |
2081 | f2fs_commit_super(sbi, false); | |
2082 | } | |
b4b10061 | 2083 | recover_out: |
04f0b2ea QS |
2084 | if (err) { |
2085 | set_sbi_flag(sbi, SBI_NEED_FSCK); | |
dcbb4c10 | 2086 | f2fs_err(sbi, "resize_fs failed, should run fsck to repair!"); |
04f0b2ea | 2087 | |
04f0b2ea QS |
2088 | spin_lock(&sbi->stat_lock); |
2089 | sbi->user_block_count += shrunk_blocks; | |
2090 | spin_unlock(&sbi->stat_lock); | |
2091 | } | |
b4b10061 | 2092 | out_err: |
8769918b | 2093 | up_write(&sbi->cp_global_sem); |
b4b10061 JK |
2094 | up_write(&sbi->gc_lock); |
2095 | thaw_super(sbi->sb); | |
04f0b2ea | 2096 | clear_sbi_flag(sbi, SBI_IS_RESIZEFS); |
04f0b2ea QS |
2097 | return err; |
2098 | } |