aboutsummaryrefslogtreecommitdiff
path: root/fs/f2fs/f2fs.h
blob: e2d302ae3a46db435a2d1b38b05c1a968d32c541 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
/* SPDX-License-Identifier: GPL-2.0 */
/*
 * fs/f2fs/f2fs.h
 *
 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
 *             http://www.samsung.com/
 */
#ifndef _LINUX_F2FS_H
#define _LINUX_F2FS_H

#include <linux/uio.h>
#include <linux/types.h>
#include <linux/page-flags.h>
#include <linux/buffer_head.h>
#include <linux/slab.h>
#include <linux/crc32.h>
#include <linux/magic.h>
#include <linux/kobject.h>
#include <linux/sched.h>
#include <linux/cred.h>
#include <linux/vmalloc.h>
#include <linux/bio.h>
#include <linux/blkdev.h>
#include <linux/quotaops.h>
#include <linux/part_stat.h>
#include <crypto/hash.h>

#include <linux/fscrypt.h>
#include <linux/fsverity.h>

#ifdef CONFIG_F2FS_CHECK_FS
#define f2fs_bug_on(sbi, condition)	BUG_ON(condition)
#else
#define f2fs_bug_on(sbi, condition)					\
	do {								\
		if (WARN_ON(condition))					\
			set_sbi_flag(sbi, SBI_NEED_FSCK);		\
	} while (0)
#endif

enum {
	FAULT_KMALLOC,
	FAULT_KVMALLOC,
	FAULT_PAGE_ALLOC,
	FAULT_PAGE_GET,
	FAULT_ALLOC_NID,
	FAULT_ORPHAN,
	FAULT_BLOCK,
	FAULT_DIR_DEPTH,
	FAULT_EVICT_INODE,
	FAULT_TRUNCATE,
	FAULT_READ_IO,
	FAULT_CHECKPOINT,
	FAULT_DISCARD,
	FAULT_WRITE_IO,
	FAULT_MAX,
};

#ifdef CONFIG_F2FS_FAULT_INJECTION
#define F2FS_ALL_FAULT_TYPE		((1 << FAULT_MAX) - 1)

struct f2fs_fault_info {
	atomic_t inject_ops;
	unsigned int inject_rate;
	unsigned int inject_type;
};

extern const char *f2fs_fault_name[FAULT_MAX];
#define IS_FAULT_SET(fi, type) ((fi)->inject_type & (1 << (type)))
#endif

/*
 * For mount options
 */
#define F2FS_MOUNT_DISABLE_ROLL_FORWARD	0x00000002
#define F2FS_MOUNT_DISCARD		0x00000004
#define F2FS_MOUNT_NOHEAP		0x00000008
#define F2FS_MOUNT_XATTR_USER		0x00000010
#define F2FS_MOUNT_POSIX_ACL		0x00000020
#define F2FS_MOUNT_DISABLE_EXT_IDENTIFY	0x00000040
#define F2FS_MOUNT_INLINE_XATTR		0x00000080
#define F2FS_MOUNT_INLINE_DATA		0x00000100
#define F2FS_MOUNT_INLINE_DENTRY	0x00000200
#define F2FS_MOUNT_FLUSH_MERGE		0x00000400
#define F2FS_MOUNT_NOBARRIER		0x00000800
#define F2FS_MOUNT_FASTBOOT		0x00001000
#define F2FS_MOUNT_EXTENT_CACHE		0x00002000
#define F2FS_MOUNT_DATA_FLUSH		0x00008000
#define F2FS_MOUNT_FAULT_INJECTION	0x00010000
#define F2FS_MOUNT_USRQUOTA		0x00080000
#define F2FS_MOUNT_GRPQUOTA		0x00100000
#define F2FS_MOUNT_PRJQUOTA		0x00200000
#define F2FS_MOUNT_QUOTA		0x00400000
#define F2FS_MOUNT_INLINE_XATTR_SIZE	0x00800000
#define F2FS_MOUNT_RESERVE_ROOT		0x01000000
#define F2FS_MOUNT_DISABLE_CHECKPOINT	0x02000000
#define F2FS_MOUNT_NORECOVERY		0x04000000
#define F2FS_MOUNT_ATGC			0x08000000
#define F2FS_MOUNT_MERGE_CHECKPOINT	0x10000000

#define F2FS_OPTION(sbi)	((sbi)->mount_opt)
#define clear_opt(sbi, option)	(F2FS_OPTION(sbi).opt &= ~F2FS_MOUNT_##option)
#define set_opt(sbi, option)	(F2FS_OPTION(sbi).opt |= F2FS_MOUNT_##option)
#define test_opt(sbi, option)	(F2FS_OPTION(sbi).opt & F2FS_MOUNT_##option)

#define ver_after(a, b)	(typecheck(unsigned long long, a) &&		\
		typecheck(unsigned long long, b) &&			\
		((long long)((a) - (b)) > 0))

typedef u32 block_t;	/*
			 * should not change u32, since it is the on-disk block
			 * address format, __le32.
			 */
typedef u32 nid_t;

#define COMPRESS_EXT_NUM		16

struct f2fs_mount_info {
	unsigned int opt;
	int write_io_size_bits;		/* Write IO size bits */
	block_t root_reserved_blocks;	/* root reserved blocks */
	kuid_t s_resuid;		/* reserved blocks for uid */
	kgid_t s_resgid;		/* reserved blocks for gid */
	int active_logs;		/* # of active logs */
	int inline_xattr_size;		/* inline xattr size */
#ifdef CONFIG_F2FS_FAULT_INJECTION
	struct f2fs_fault_info fault_info;	/* For fault injection */
#endif
#ifdef CONFIG_QUOTA
	/* Names of quota files with journalled quota */
	char *s_qf_names[MAXQUOTAS];
	int s_jquota_fmt;			/* Format of quota to use */
#endif
	/* For which write hints are passed down to block layer */
	int whint_mode;
	int alloc_mode;			/* segment allocation policy */
	int fsync_mode;			/* fsync policy */
	int fs_mode;			/* fs mode: LFS or ADAPTIVE */
	int bggc_mode;			/* bggc mode: off, on or sync */
	struct fscrypt_dummy_policy dummy_enc_policy; /* test dummy encryption */
	block_t unusable_cap_perc;	/* percentage for cap */
	block_t unusable_cap;		/* Amount of space allowed to be
					 * unusable when disabling checkpoint
					 */

	/* For compression */
	unsigned char compress_algorithm;	/* algorithm type */
	unsigned char compress_log_size;	/* cluster log size */
	unsigned char compress_level;		/* compress level */
	bool compress_chksum;			/* compressed data chksum */
	unsigned char compress_ext_cnt;		/* extension count */
	int compress_mode;			/* compression mode */
	unsigned char extensions[COMPRESS_EXT_NUM][F2FS_EXTENSION_LEN];	/* extensions */
};

#define F2FS_FEATURE_ENCRYPT		0x0001
#define F2FS_FEATURE_BLKZONED		0x0002
#define F2FS_FEATURE_ATOMIC_WRITE	0x0004
#define F2FS_FEATURE_EXTRA_ATTR		0x0008
#define F2FS_FEATURE_PRJQUOTA		0x0010
#define F2FS_FEATURE_INODE_CHKSUM	0x0020
#define F2FS_FEATURE_FLEXIBLE_INLINE_XATTR	0x0040
#define F2FS_FEATURE_QUOTA_INO		0x0080
#define F2FS_FEATURE_INODE_CRTIME	0x0100
#define F2FS_FEATURE_LOST_FOUND		0x0200
#define F2FS_FEATURE_VERITY		0x0400
#define F2FS_FEATURE_SB_CHKSUM		0x0800
#define F2FS_FEATURE_CASEFOLD		0x1000
#define F2FS_FEATURE_COMPRESSION	0x2000

#define __F2FS_HAS_FEATURE(raw_super, mask)				\
	((raw_super->feature & cpu_to_le32(mask)) != 0)
#define F2FS_HAS_FEATURE(sbi, mask)	__F2FS_HAS_FEATURE(sbi->raw_super, mask)
#define F2FS_SET_FEATURE(sbi, mask)					\
	(sbi->raw_super->feature |= cpu_to_le32(mask))
#define F2FS_CLEAR_FEATURE(sbi, mask)					\
	(sbi->raw_super->feature &= ~cpu_to_le32(mask))

/*
 * Default values for user and/or group using reserved blocks
 */
#define	F2FS_DEF_RESUID		0
#define	F2FS_DEF_RESGID		0

/*
 * For checkpoint manager
 */
enum {
	NAT_BITMAP,
	SIT_BITMAP
};

#define	CP_UMOUNT	0x00000001
#define	CP_FASTBOOT	0x00000002
#define	CP_SYNC		0x00000004
#define	CP_RECOVERY	0x00000008
#define	CP_DISCARD	0x00000010
#define CP_TRIMMED	0x00000020
#define CP_PAUSE	0x00000040
#define CP_RESIZE 	0x00000080

#define MAX_DISCARD_BLOCKS(sbi)		BLKS_PER_SEC(sbi)
#define DEF_MAX_DISCARD_REQUEST		8	/* issue 8 discards per round */
#define DEF_MIN_DISCARD_ISSUE_TIME	50	/* 50 ms, if exists */
#define DEF_MID_DISCARD_ISSUE_TIME	500	/* 500 ms, if device busy */
#define DEF_MAX_DISCARD_ISSUE_TIME	60000	/* 60 s, if no candidates */
#define DEF_DISCARD_URGENT_UTIL		80	/* do more discard over 80% */
#define DEF_CP_INTERVAL			60	/* 60 secs */
#define DEF_IDLE_INTERVAL		5	/* 5 secs */
#define DEF_DISABLE_INTERVAL		5	/* 5 secs */
#define DEF_DISABLE_QUICK_INTERVAL	1	/* 1 secs */
#define DEF_UMOUNT_DISCARD_TIMEOUT	5	/* 5 secs */

struct cp_control {
	int reason;
	__u64 trim_start;
	__u64 trim_end;
	__u64 trim_minlen;
};

/*
 * indicate meta/data type
 */
enum {
	META_CP,
	META_NAT,
	META_SIT,
	META_SSA,
	META_MAX,
	META_POR,
	DATA_GENERIC,		/* check range only */
	DATA_GENERIC_ENHANCE,	/* strong check on range and segment bitmap */
	DATA_GENERIC_ENHANCE_READ,	/*
					 * strong check on range and segment
					 * bitmap but no warning due to race
					 * condition of read on truncated area
					 * by extent_cache
					 */
	META_GENERIC,
};

/* for the list of ino */
enum {
	ORPHAN_INO,		/* for orphan ino list */
	APPEND_INO,		/* for append ino list */
	UPDATE_INO,		/* for update ino list */
	TRANS_DIR_INO,		/* for trasactions dir ino list */
	FLUSH_INO,		/* for multiple device flushing */
	MAX_INO_ENTRY,		/* max. list */
};

struct ino_entry {
	struct list_head list;		/* list head */
	nid_t ino;			/* inode number */
	unsigned int dirty_device;	/* dirty device bitmap */
};

/* for the list of inodes to be GCed */
struct inode_entry {
	struct list_head list;	/* list head */
	struct inode *inode;	/* vfs inode pointer */
};

struct fsync_node_entry {
	struct list_head list;	/* list head */
	struct page *page;	/* warm node page pointer */
	unsigned int seq_id;	/* sequence id */
};

struct ckpt_req {
	struct completion wait;		/* completion for checkpoint done */
	struct llist_node llnode;	/* llist_node to be linked in wait queue */
	int ret;			/* return code of checkpoint */
	ktime_t queue_time;		/* request queued time */
};

struct ckpt_req_control {
	struct task_struct *f2fs_issue_ckpt;	/* checkpoint task */
	int ckpt_thread_ioprio;			/* checkpoint merge thread ioprio */
	wait_queue_head_t ckpt_wait_queue;	/* waiting queue for wake-up */
	atomic_t issued_ckpt;		/* # of actually issued ckpts */
	atomic_t total_ckpt;		/* # of total ckpts */
	atomic_t queued_ckpt;		/* # of queued ckpts */
	struct llist_head issue_list;	/* list for command issue */
	spinlock_t stat_lock;		/* lock for below checkpoint time stats */
	unsigned int cur_time;		/* cur wait time in msec for currently issued checkpoint */
	unsigned int peak_time;		/* peak wait time in msec until now */
};

/* for the bitmap indicate blocks to be discarded */
struct discard_entry {
	struct list_head list;	/* list head */
	block_t start_blkaddr;	/* start blockaddr of current segment */
	unsigned char discard_map[SIT_VBLOCK_MAP_SIZE];	/* segment discard bitmap */
};

/* default discard granularity of inner discard thread, unit: block count */
#define DEFAULT_DISCARD_GRANULARITY		16

/* max discard pend list number */
#define MAX_PLIST_NUM		512
#define plist_idx(blk_num)	((blk_num) >= MAX_PLIST_NUM ?		\
					(MAX_PLIST_NUM - 1) : ((blk_num) - 1))

enum {
	D_PREP,			/* initial */
	D_PARTIAL,		/* partially submitted */
	D_SUBMIT,		/* all submitted */
	D_DONE,			/* finished */
};

struct discard_info {
	block_t lstart;			/* logical start address */
	block_t len;			/* length */
	block_t start;			/* actual start address in dev */
};

struct discard_cmd {
	struct rb_node rb_node;		/* rb node located in rb-tree */
	union {
		struct {
			block_t lstart;	/* logical start address */
			block_t len;	/* length */
			block_t start;	/* actual start address in dev */
		};
		struct discard_info di;	/* discard info */

	};
	struct list_head list;		/* command list */
	struct completion wait;		/* compleation */
	struct block_device *bdev;	/* bdev */
	unsigned short ref;		/* reference count */
	unsigned char state;		/* state */
	unsigned char queued;		/* queued discard */
	int error;			/* bio error */
	spinlock_t lock;		/* for state/bio_ref updating */
	unsigned short bio_ref;		/* bio reference count */
};

enum {
	DPOLICY_BG,
	DPOLICY_FORCE,
	DPOLICY_FSTRIM,
	DPOLICY_UMOUNT,
	MAX_DPOLICY,
};

struct discard_policy {
	int type;			/* type of discard */
	unsigned int min_interval;	/* used for candidates exist */
	unsigned int mid_interval;	/* used for device busy */
	unsigned int max_interval;	/* used for candidates not exist */
	unsigned int max_requests;	/* # of discards issued per round */
	unsigned int io_aware_gran;	/* minimum granularity discard not be aware of I/O */
	bool io_aware;			/* issue discard in idle time */
	bool sync;			/* submit discard with REQ_SYNC flag */
	bool ordered;			/* issue discard by lba order */
	bool timeout;			/* discard timeout for put_super */
	unsigned int granularity;	/* discard granularity */
};

struct discard_cmd_control {
	struct task_struct *f2fs_issue_discard;	/* discard thread */
	struct list_head entry_list;		/* 4KB discard entry list */
	struct list_head pend_list[MAX_PLIST_NUM];/* store pending entries */
	struct list_head wait_list;		/* store on-flushing entries */
	struct list_head fstrim_list;		/* in-flight discard from fstrim */
	wait_queue_head_t discard_wait_queue;	/* waiting queue for wake-up */
	unsigned int discard_wake;		/* to wake up discard thread */
	struct mutex cmd_lock;
	unsigned int nr_discards;		/* # of discards in the list */
	unsigned int max_discards;		/* max. discards to be issued */
	unsigned int discard_granularity;	/* discard granularity */
	unsigned int undiscard_blks;		/* # of undiscard blocks */
	unsigned int next_pos;			/* next discard position */
	atomic_t issued_discard;		/* # of issued discard */
	atomic_t queued_discard;		/* # of queued discard */
	atomic_t discard_cmd_cnt;		/* # of cached cmd count */
	struct rb_root_cached root;		/* root of discard rb-tree */
	bool rbtree_check;			/* config for consistence check */
};

/* for the list of fsync inodes, used only during recovery */
struct fsync_inode_entry {
	struct list_head list;	/* list head */
	struct inode *inode;	/* vfs inode pointer */
	block_t blkaddr;	/* block address locating the last fsync */
	block_t last_dentry;	/* block address locating the last dentry */
};

#define nats_in_cursum(jnl)		(le16_to_cpu((jnl)->n_nats))
#define sits_in_cursum(jnl)		(le16_to_cpu((jnl)->n_sits))

#define nat_in_journal(jnl, i)		((jnl)->nat_j.entries[i].ne)
#define nid_in_journal(jnl, i)		((jnl)->nat_j.entries[i].nid)
#define sit_in_journal(jnl, i)		((jnl)->sit_j.entries[i].se)
#define segno_in_journal(jnl, i)	((jnl)->sit_j.entries[i].segno)

#define MAX_NAT_JENTRIES(jnl)	(NAT_JOURNAL_ENTRIES - nats_in_cursum(jnl))
#define MAX_SIT_JENTRIES(jnl)	(SIT_JOURNAL_ENTRIES - sits_in_cursum(jnl))

static inline int update_nats_in_cursum(struct f2fs_journal *journal, int i)
{
	int before = nats_in_cursum(journal);

	journal->n_nats = cpu_to_le16(before + i);
	return before;
}

static inline int update_sits_in_cursum(struct f2fs_journal *journal, int i)
{
	int before = sits_in_cursum(journal);

	journal->n_sits = cpu_to_le16(before + i);
	return before;
}

static inline bool __has_cursum_space(struct f2fs_journal *journal,
							int size, int type)
{
	if (type == NAT_JOURNAL)
		return size <= MAX_NAT_JENTRIES(journal);
	return size <= MAX_SIT_JENTRIES(journal);
}

/* for inline stuff */
#define DEF_INLINE_RESERVED_SIZE	1
static inline int get_extra_isize(struct inode *inode);
static inline int get_inline_xattr_addrs(struct inode *inode);
#define MAX_INLINE_DATA(inode)	(sizeof(__le32) *			\
				(CUR_ADDRS_PER_INODE(inode) -		\
				get_inline_xattr_addrs(inode) -	\
				DEF_INLINE_RESERVED_SIZE))

/* for inline dir */
#define NR_INLINE_DENTRY(inode)	(MAX_INLINE_DATA(inode) * BITS_PER_BYTE / \
				((SIZE_OF_DIR_ENTRY + F2FS_SLOT_LEN) * \
				BITS_PER_BYTE + 1))
#define INLINE_DENTRY_BITMAP_SIZE(inode) \
	DIV_ROUND_UP(NR_INLINE_DENTRY(inode), BITS_PER_BYTE)
#define INLINE_RESERVED_SIZE(inode)	(MAX_INLINE_DATA(inode) - \
				((SIZE_OF_DIR_ENTRY + F2FS_SLOT_LEN) * \
				NR_INLINE_DENTRY(inode) + \
				INLINE_DENTRY_BITMAP_SIZE(inode)))

/*
 * For INODE and NODE manager
 */
/* for directory operations */

struct f2fs_filename {
	/*
	 * The filename the user specified.  This is NULL for some
	 * filesystem-internal operations, e.g. converting an inline directory
	 * to a non-inline one, or roll-forward recovering an encrypted dentry.
	 */
	const struct qstr *usr_fname;

	/*
	 * The on-disk filename.  For encrypted directories, this is encrypted.
	 * This may be NULL for lookups in an encrypted dir without the key.
	 */
	struct fscrypt_str disk_name;

	/* The dirhash of this filename */
	f2fs_hash_t hash;

#ifdef CONFIG_FS_ENCRYPTION
	/*
	 * For lookups in encrypted directories: either the buffer backing
	 * disk_name, or a buffer that holds the decoded no-key name.
	 */
	struct fscrypt_str crypto_buf;
#endif
#ifdef CONFIG_UNICODE
	/*
	 * For casefolded directories: the casefolded name, but it's left NULL
	 * if the original name is not valid Unicode, if the directory is both
	 * casefolded and encrypted and its encryption key is unavailable, or if
	 * the filesystem is doing an internal operation where usr_fname is also
	 * NULL.  In all these cases we fall back to treating the name as an
	 * opaque byte sequence.
	 */
	struct fscrypt_str cf_name;
#endif
};

struct f2fs_dentry_ptr {
	struct inode *inode;
	void *bitmap;
	struct f2fs_dir_entry *dentry;
	__u8 (*filename)[F2FS_SLOT_LEN];
	int max;
	int nr_bitmap;
};

static inline void make_dentry_ptr_block(struct inode *inode,
		struct f2fs_dentry_ptr *d, struct f2fs_dentry_block *t)
{
	d->inode = inode;
	d->max = NR_DENTRY_IN_BLOCK;
	d->nr_bitmap = SIZE_OF_DENTRY_BITMAP;
	d->bitmap = t->dentry_bitmap;
	d->dentry = t->dentry;
	d->filename = t->filename;
}

static inline void make_dentry_ptr_inline(struct inode *inode,
					struct f2fs_dentry_ptr *d, void *t)
{
	int entry_cnt = NR_INLINE_DENTRY(inode);
	int bitmap_size = INLINE_DENTRY_BITMAP_SIZE(inode);
	int reserved_size = INLINE_RESERVED_SIZE(inode);

	d->inode = inode;
	d->max = entry_cnt;
	d->nr_bitmap = bitmap_size;
	d->bitmap = t;
	d->dentry = t + bitmap_size + reserved_size;
	d->filename = t + bitmap_size + reserved_size +
					SIZE_OF_DIR_ENTRY * entry_cnt;
}

/*
 * XATTR_NODE_OFFSET stores xattrs to one node block per file keeping -1
 * as its node offset to distinguish from index node blocks.
 * But some bits are used to mark the node block.
 */
#define XATTR_NODE_OFFSET	((((unsigned int)-1) << OFFSET_BIT_SHIFT) \
				>> OFFSET_BIT_SHIFT)
enum {
	ALLOC_NODE,			/* allocate a new node page if needed */
	LOOKUP_NODE,			/* look up a node without readahead */
	LOOKUP_NODE_RA,			/*
					 * look up a node with readahead called
					 * by get_data_block.
					 */
};

#define DEFAULT_RETRY_IO_COUNT	8	/* maximum retry read IO count */

/* congestion wait timeout value, default: 20ms */
#define	DEFAULT_IO_TIMEOUT	(msecs_to_jiffies(20))

/* maximum retry quota flush count */
#define DEFAULT_RETRY_QUOTA_FLUSH_COUNT		8

#define F2FS_LINK_MAX	0xffffffff	/* maximum link count per file */

#define MAX_DIR_RA_PAGES	4	/* maximum ra pages of dir */

/* for in-memory extent cache entry */
#define F2FS_MIN_EXTENT_LEN	64	/* minimum extent length */

/* number of extent info in extent cache we try to shrink */
#define EXTENT_CACHE_SHRINK_NUMBER	128

struct rb_entry {
	struct rb_node rb_node;		/* rb node located in rb-tree */
	union {
		struct {
			unsigned int ofs;	/* start offset of the entry */
			unsigned int len;	/* length of the entry */
		};
		unsigned long long key;		/* 64-bits key */
	} __packed;
};

struct extent_info {
	unsigned int fofs;		/* start offset in a file */
	unsigned int len;		/* length of the extent */
	u32 blk;			/* start block address of the extent */
};

struct extent_node {
	struct rb_node rb_node;		/* rb node located in rb-tree */
	struct extent_info ei;		/* extent info */
	struct list_head list;		/* node in global extent list of sbi */
	struct extent_tree *et;		/* extent tree pointer */
};

struct extent_tree {
	nid_t ino;			/* inode number */
	struct rb_root_cached root;	/* root of extent info rb-tree */
	struct extent_node *cached_en;	/* recently accessed extent node */
	struct extent_info largest;	/* largested extent info */
	struct list_head list;		/* to be used by sbi->zombie_list */
	rwlock_t lock;			/* protect extent info rb-tree */
	atomic_t node_cnt;		/* # of extent node in rb-tree*/
	bool largest_updated;		/* largest extent updated */
};

/*
 * This structure is taken from ext4_map_blocks.
 *
 * Note that, however, f2fs uses NEW and MAPPED flags for f2fs_map_blocks().
 */
#define F2FS_MAP_NEW		(1 << BH_New)
#define F2FS_MAP_MAPPED		(1 << BH_Mapped)
#define F2FS_MAP_UNWRITTEN	(1 << BH_Unwritten)
#define F2FS_MAP_FLAGS		(F2FS_MAP_NEW | F2FS_MAP_MAPPED |\
				F2FS_MAP_UNWRITTEN)

struct f2fs_map_blocks {
	block_t m_pblk;
	block_t m_lblk;
	unsigned int m_len;
	unsigned int m_flags;
	pgoff_t *m_next_pgofs;		/* point next possible non-hole pgofs */
	pgoff_t *m_next_extent;		/* point to next possible extent */
	int m_seg_type;
	bool m_may_create;		/* indicate it is from write path */
};

/* for flag in get_data_block */
enum {
	F2FS_GET_BLOCK_DEFAULT,
	F2FS_GET_BLOCK_FIEMAP,
	F2FS_GET_BLOCK_BMAP,
	F2FS_GET_BLOCK_DIO,
	F2FS_GET_BLOCK_PRE_DIO,
	F2FS_GET_BLOCK_PRE_AIO,
	F2FS_GET_BLOCK_PRECACHE,
};

/*
 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
 */
#define FADVISE_COLD_BIT	0x01
#define FADVISE_LOST_PINO_BIT	0x02
#define FADVISE_ENCRYPT_BIT	0x04
#define FADVISE_ENC_NAME_BIT	0x08
#define FADVISE_KEEP_SIZE_BIT	0x10
#define FADVISE_HOT_BIT		0x20
#define FADVISE_VERITY_BIT	0x40

#define FADVISE_MODIFIABLE_BITS	(FADVISE_COLD_BIT | FADVISE_HOT_BIT)

#define file_is_cold(inode)	is_file(inode, FADVISE_COLD_BIT)
#define file_wrong_pino(inode)	is_file(inode, FADVISE_LOST_PINO_BIT)
#define file_set_cold(inode)	set_file(inode, FADVISE_COLD_BIT)
#define file_lost_pino(inode)	set_file(inode, FADVISE_LOST_PINO_BIT)
#define file_clear_cold(inode)	clear_file(inode, FADVISE_COLD_BIT)
#define file_got_pino(inode)	clear_file(inode, FADVISE_LOST_PINO_BIT)
#define file_is_encrypt(inode)	is_file(inode, FADVISE_ENCRYPT_BIT)
#define file_set_encrypt(inode)	set_file(inode, FADVISE_ENCRYPT_BIT)
#define file_clear_encrypt(inode) clear_file(inode, FADVISE_ENCRYPT_BIT)
#define file_enc_name(inode)	is_file(inode, FADVISE_ENC_NAME_BIT)
#define file_set_enc_name(inode) set_file(inode, FADVISE_ENC_NAME_BIT)
#define file_keep_isize(inode)	is_file(inode, FADVISE_KEEP_SIZE_BIT)
#define file_set_keep_isize(inode) set_file(inode, FADVISE_KEEP_SIZE_BIT)
#define file_is_hot(inode)	is_file(inode, FADVISE_HOT_BIT)
#define file_set_hot(inode)	set_file(inode, FADVISE_HOT_BIT)
#define file_clear_hot(inode)	clear_file(inode, FADVISE_HOT_BIT)
#define file_is_verity(inode)	is_file(inode, FADVISE_VERITY_BIT)
#define file_set_verity(inode)	set_file(inode, FADVISE_VERITY_BIT)

#define DEF_DIR_LEVEL		0

enum {
	GC_FAILURE_PIN,
	GC_FAILURE_ATOMIC,
	MAX_GC_FAILURE
};

/* used for f2fs_inode_info->flags */
enum {
	FI_NEW_INODE,		/* indicate newly allocated inode */
	FI_DIRTY_INODE,		/* indicate inode is dirty or not */
	FI_AUTO_RECOVER,	/* indicate inode is recoverable */
	FI_DIRTY_DIR,		/* indicate directory has dirty pages */
	FI_INC_LINK,		/* need to increment i_nlink */
	FI_ACL_MODE,		/* indicate acl mode */
	FI_NO_ALLOC,		/* should not allocate any blocks */
	FI_FREE_NID,		/* free allocated nide */
	FI_NO_EXTENT,		/* not to use the extent cache */
	FI_INLINE_XATTR,	/* used for inline xattr */
	FI_INLINE_DATA,		/* used for inline data*/
	FI_INLINE_DENTRY,	/* used for inline dentry */
	FI_APPEND_WRITE,	/* inode has appended data */
	FI_UPDATE_WRITE,	/* inode has in-place-update data */
	FI_NEED_IPU,		/* used for ipu per file */
	FI_ATOMIC_FILE,		/* indicate atomic file */
	FI_ATOMIC_COMMIT,	/* indicate the state of atomical committing */
	FI_VOLATILE_FILE,	/* indicate volatile file */
	FI_FIRST_BLOCK_WRITTEN,	/* indicate #0 data block was written */
	FI_DROP_CACHE,		/* drop dirty page cache */
	FI_DATA_EXIST,		/* indicate data exists */
	FI_INLINE_DOTS,		/* indicate inline dot dentries */
	FI_DO_DEFRAG,		/* indicate defragment is running */
	FI_DIRTY_FILE,		/* indicate regular/symlink has dirty pages */
	FI_NO_PREALLOC,		/* indicate skipped preallocated blocks */
	FI_HOT_DATA,		/* indicate file is hot */
	FI_EXTRA_ATTR,		/* indicate file has extra attribute */
	FI_PROJ_INHERIT,	/* indicate file inherits projectid */
	FI_PIN_FILE,		/* indicate file should not be gced */
	FI_ATOMIC_REVOKE_REQUEST, /* request to drop atomic data */
	FI_VERITY_IN_PROGRESS,	/* building fs-verity Merkle tree */
	FI_COMPRESSED_FILE,	/* indicate file's data can be compressed */
	FI_COMPRESS_CORRUPT,	/* indicate compressed cluster is corrupted */
	FI_MMAP_FILE,		/* indicate file was mmapped */
	FI_ENABLE_COMPRESS,	/* enable compression in "user" compression mode */
	FI_MAX,			/* max flag, never be used */
};

struct f2fs_inode_info {
	struct inode vfs_inode;		/* serve a vfs inode */
	unsigned long i_flags;		/* keep an inode flags for ioctl */
	unsigned char i_advise;		/* use to give file attribute hints */
	unsigned char i_dir_level;	/* use for dentry level for large dir */
	unsigned int i_current_depth;	/* only for directory depth */
	/* for gc failure statistic */
	unsigned int i_gc_failures[MAX_GC_FAILURE];
	unsigned int i_pino;		/* parent inode number */
	umode_t i_acl_mode;		/* keep file acl mode temporarily */

	/* Use below internally in f2fs*/
	unsigned long flags[BITS_TO_LONGS(FI_MAX)];	/* use to pass per-file flags */
	struct rw_semaphore i_sem;	/* protect fi info */
	atomic_t dirty_pages;		/* # of dirty pages */
	f2fs_hash_t chash;		/* hash value of given file name */
	unsigned int clevel;		/* maximum level of given file name */
	struct task_struct *task;	/* lookup and create consistency */
	struct task_struct *cp_task;	/* separate cp/wb IO stats*/
	nid_t i_xattr_nid;		/* node id that contains xattrs */
	loff_t	last_disk_size;		/* lastly written file size */
	spinlock_t i_size_lock;		/* protect last_disk_size */

#ifdef CONFIG_QUOTA
	struct dquot *i_dquot[MAXQUOTAS];

	/* quota space reservation, managed internally by quota code */
	qsize_t i_reserved_quota;
#endif
	struct list_head dirty_list;	/* dirty list for dirs and files */
	struct list_head gdirty_list;	/* linked in global dirty list */
	struct list_head inmem_ilist;	/* list for inmem inodes */
	struct list_head inmem_pages;	/* inmemory pages managed by f2fs */
	struct task_struct *inmem_task;	/* store inmemory task */
	struct mutex inmem_lock;	/* lock for inmemory pages */
	struct extent_tree *extent_tree;	/* cached extent_tree entry */

	/* avoid racing between foreground op and gc */
	struct rw_semaphore i_gc_rwsem[2];
	struct rw_semaphore i_mmap_sem;
	struct rw_semaphore i_xattr_sem; /* avoid racing between reading and changing EAs */

	int i_extra_isize;		/* size of extra space located in i_addr */
	kprojid_t i_projid;		/* id for project quota */
	int i_inline_xattr_size;	/* inline xattr size */
	struct timespec64 i_crtime;	/* inode creation time */
	struct timespec64 i_disk_time[4];/* inode disk times */

	/* for file compress */
	atomic_t i_compr_blocks;		/* # of compressed blocks */
	unsigned char i_compress_algorithm;	/* algorithm type */
	unsigned char i_log_cluster_size;	/* log of cluster size */
	unsigned char i_compress_level;		/* compress level (lz4hc,zstd) */
	unsigned short i_compress_flag;		/* compress flag */
	unsigned int i_cluster_size;		/* cluster size */
};

static inline void get_extent_info(struct extent_info *ext,
					struct f2fs_extent *i_ext)
{
	ext->fofs = le32_to_cpu(i_ext->fofs);
	ext->blk = le32_to_cpu(i_ext->blk);
	ext->len = le32_to_cpu(i_ext->len);
}

static inline void set_raw_extent(struct extent_info *ext,
					struct f2fs_extent *i_ext)
{
	i_ext->fofs = cpu_to_le32(ext->fofs);
	i_ext->blk = cpu_to_le32(ext->blk);
	i_ext->len = cpu_to_le32(ext->len);
}

static inline void set_extent_info(struct extent_info *ei, unsigned int fofs,
						u32 blk, unsigned int len)
{
	ei->fofs = fofs;
	ei->blk = blk;
	ei->len = len;
}

static inline bool __is_discard_mergeable(struct discard_info *back,
			struct discard_info *front, unsigned int max_len)
{
	return (back->lstart + back->len == front->lstart) &&
		(back->len + front->len <= max_len);
}

static inline bool __is_discard_back_mergeable(struct discard_info *cur,
			struct discard_info *back, unsigned int max_len)
{
	return __is_discard_mergeable(back, cur, max_len);
}

static inline bool __is_discard_front_mergeable(struct discard_info *cur,
			struct discard_info *front, unsigned int max_len)
{
	return __is_discard_mergeable(cur, front, max_len);
}

static inline bool __is_extent_mergeable(struct extent_info *back,
						struct extent_info *front)
{
	return (back->fofs + back->len == front->fofs &&
			back->blk + back->len == front->blk);
}

static inline bool __is_back_mergeable(struct extent_info *cur,
						struct extent_info *back)
{
	return __is_extent_mergeable(back, cur);
}

static inline bool __is_front_mergeable(struct extent_info *cur,
						struct extent_info *front)
{
	return __is_extent_mergeable(cur, front);
}

extern void f2fs_mark_inode_dirty_sync(struct inode *inode, bool sync);
static inline void __try_update_largest_extent(struct extent_tree *et,
						struct extent_node *en)
{
	if (en->ei.len > et->largest.len) {
		et->largest = en->ei;
		et->largest_updated = true;
	}
}

/*
 * For free nid management
 */
enum nid_state {
	FREE_NID,		/* newly added to free nid list */
	PREALLOC_NID,		/* it is preallocated */
	MAX_NID_STATE,
};

enum nat_state {
	TOTAL_NAT,
	DIRTY_NAT,
	RECLAIMABLE_NAT,
	MAX_NAT_STATE,
};

struct f2fs_nm_info {
	block_t nat_blkaddr;		/* base disk address of NAT */
	nid_t max_nid;			/* maximum possible node ids */
	nid_t available_nids;		/* # of available node ids */
	nid_t next_scan_nid;		/* the next nid to be scanned */
	unsigned int ram_thresh;	/* control the memory footprint */
	unsigned int ra_nid_pages;	/* # of nid pages to be readaheaded */
	unsigned int dirty_nats_ratio;	/* control dirty nats ratio threshold */

	/* NAT cache management */
	struct radix_tree_root nat_root;/* root of the nat entry cache */
	struct radix_tree_root nat_set_root;/* root of the nat set cache */
	struct rw_semaphore nat_tree_lock;	/* protect nat_tree_lock */
	struct list_head nat_entries;	/* cached nat entry list (clean) */
	spinlock_t nat_list_lock;	/* protect clean nat entry list */
	unsigned int nat_cnt[MAX_NAT_STATE]; /* the # of cached nat entries */
	unsigned int nat_blocks;	/* # of nat blocks */

	/* free node ids management */
	struct radix_tree_root free_nid_root;/* root of the free_nid cache */
	struct list_head free_nid_list;		/* list for free nids excluding preallocated nids */
	unsigned int nid_cnt[MAX_NID_STATE];	/* the number of free node id */
	spinlock_t nid_list_lock;	/* protect nid lists ops */
	struct mutex build_lock;	/* lock for build free nids */
	unsigned char **free_nid_bitmap;
	unsigned char *nat_block_bitmap;
	unsigned short *free_nid_count;	/* free nid count of NAT block */

	/* for checkpoint */
	char *nat_bitmap;		/* NAT bitmap pointer */

	unsigned int nat_bits_blocks;	/* # of nat bits blocks */
	unsigned char *nat_bits;	/* NAT bits blocks */
	unsigned char *full_nat_bits;	/* full NAT pages */
	unsigned char *empty_nat_bits;	/* empty NAT pages */
#ifdef CONFIG_F2FS_CHECK_FS
	char *nat_bitmap_mir;		/* NAT bitmap mirror */
#endif
	int bitmap_size;		/* bitmap size */
};

/*
 * this structure is used as one of function parameters.
 * all the information are dedicated to a given direct node block determined
 * by the data offset in a file.
 */
struct dnode_of_data {
	struct inode *inode;		/* vfs inode pointer */
	struct page *inode_page;	/* its inode page, NULL is possible */
	struct page *node_page;		/* cached direct node page */
	nid_t nid;			/* node id of the direct node block */
	unsigned int ofs_in_node;	/* data offset in the node page */
	bool inode_page_locked;		/* inode page is locked or not */
	bool node_changed;		/* is node block changed */
	char cur_level;			/* level of hole node page */
	char max_level;			/* level of current page located */
	block_t	data_blkaddr;		/* block address of the node block */
};

static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
		struct page *ipage, struct page *npage, nid_t nid)
{
	memset(dn, 0, sizeof(*dn));
	dn->inode = inode;
	dn->inode_page = ipage;
	dn->node_page = npage;
	dn->nid = nid;
}

/*
 * For SIT manager
 *
 * By default, there are 6 active log areas across the whole main area.
 * When considering hot and cold data separation to reduce cleaning overhead,
 * we split 3 for data logs and 3 for node logs as hot, warm, and cold types,
 * respectively.
 * In the current design, you should not change the numbers intentionally.
 * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6
 * logs individually according to the underlying devices. (default: 6)
 * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for
 * data and 8 for node logs.
 */
#define	NR_CURSEG_DATA_TYPE	(3)
#define NR_CURSEG_NODE_TYPE	(3)
#define NR_CURSEG_INMEM_TYPE	(2)
#define NR_CURSEG_PERSIST_TYPE	(NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)
#define NR_CURSEG_TYPE		(NR_CURSEG_INMEM_TYPE + NR_CURSEG_PERSIST_TYPE)

enum {
	CURSEG_HOT_DATA	= 0,	/* directory entry blocks */
	CURSEG_WARM_DATA,	/* data blocks */
	CURSEG_COLD_DATA,	/* multimedia or GCed data blocks */
	CURSEG_HOT_NODE,	/* direct node blocks of directory files */
	CURSEG_WARM_NODE,	/* direct node blocks of normal files */
	CURSEG_COLD_NODE,	/* indirect node blocks */
	NR_PERSISTENT_LOG,	/* number of persistent log */
	CURSEG_COLD_DATA_PINNED = NR_PERSISTENT_LOG,
				/* pinned file that needs consecutive block address */
	CURSEG_ALL_DATA_ATGC,	/* SSR alloctor in hot/warm/cold data area */
	NO_CHECK_TYPE,		/* number of persistent & inmem log */
};

struct flush_cmd {
	struct completion wait;
	struct llist_node llnode;
	nid_t ino;
	int ret;
};

struct flush_cmd_control {
	struct task_struct *f2fs_issue_flush;	/* flush thread */
	wait_queue_head_t flush_wait_queue;	/* waiting queue for wake-up */
	atomic_t issued_flush;			/* # of issued flushes */
	atomic_t queued_flush;			/* # of queued flushes */
	struct llist_head issue_list;		/* list for command issue */
	struct llist_node *dispatch_list;	/* list for command dispatch */
};

struct f2fs_sm_info {
	struct sit_info *sit_info;		/* whole segment information */
	struct free_segmap_info *free_info;	/* free segment information */
	struct dirty_seglist_info *dirty_info;	/* dirty segment information */
	struct curseg_info *curseg_array;	/* active segment information */

	struct rw_semaphore curseg_lock;	/* for preventing curseg change */

	block_t seg0_blkaddr;		/* block address of 0'th segment */
	block_t main_blkaddr;		/* start block address of main area */
	block_t ssa_blkaddr;		/* start block address of SSA area */

	unsigned int segment_count;	/* total # of segments */
	unsigned int main_segments;	/* # of segments in main area */
	unsigned int reserved_segments;	/* # of reserved segments */
	unsigned int ovp_segments;	/* # of overprovision segments */

	/* a threshold to reclaim prefree segments */
	unsigned int rec_prefree_segments;

	/* for batched trimming */
	unsigned int trim_sections;		/* # of sections to trim */

	struct list_head sit_entry_set;	/* sit entry set list */

	unsigned int ipu_policy;	/* in-place-update policy */
	unsigned int min_ipu_util;	/* in-place-update threshold */
	unsigned int min_fsync_blocks;	/* threshold for fsync */
	unsigned int min_seq_blocks;	/* threshold for sequential blocks */
	unsigned int min_hot_blocks;	/* threshold for hot block allocation */
	unsigned int min_ssr_sections;	/* threshold to trigger SSR allocation */

	/* for flush command control */
	struct flush_cmd_control *fcc_info;

	/* for discard command control */
	struct discard_cmd_control *dcc_info;
};

/*
 * For superblock
 */
/*
 * COUNT_TYPE for monitoring
 *
 * f2fs monitors the number of several block types such as on-writeback,
 * dirty dentry blocks, dirty node blocks, and dirty meta blocks.
 */
#define WB_DATA_TYPE(p)	(__is_cp_guaranteed(p) ? F2FS_WB_CP_DATA : F2FS_WB_DATA)
enum count_type {
	F2FS_DIRTY_DENTS,
	F2FS_DIRTY_DATA,
	F2FS_DIRTY_QDATA,
	F2FS_DIRTY_NODES,
	F2FS_DIRTY_META,
	F2FS_INMEM_PAGES,
	F2FS_DIRTY_IMETA,
	F2FS_WB_CP_DATA,
	F2FS_WB_DATA,
	F2FS_RD_DATA,
	F2FS_RD_NODE,
	F2FS_RD_META,
	F2FS_DIO_WRITE,
	F2FS_DIO_READ,
	NR_COUNT_TYPE,
};

/*
 * The below are the page types of bios used in submit_bio().
 * The available types are:
 * DATA			User data pages. It operates as async mode.
 * NODE			Node pages. It operates as async mode.
 * META			FS metadata pages such as SIT, NAT, CP.
 * NR_PAGE_TYPE		The number of page types.
 * META_FLUSH		Make sure the previous pages are written
 *			with waiting the bio's completion
 * ...			Only can be used with META.
 */
#define PAGE_TYPE_OF_BIO(type)	((type) > META ? META : (type))
enum page_type {
	DATA,
	NODE,
	META,
	NR_PAGE_TYPE,
	META_FLUSH,
	INMEM,		/* the below types are used by tracepoints only. */
	INMEM_DROP,
	INMEM_INVALIDATE,
	INMEM_REVOKE,
	IPU,
	OPU,
};

enum temp_type {
	HOT = 0,	/* must be zero for meta bio */
	WARM,
	COLD,
	NR_TEMP_TYPE,
};

enum need_lock_type {
	LOCK_REQ = 0,
	LOCK_DONE,
	LOCK_RETRY,
};

enum cp_reason_type {
	CP_NO_NEEDED,
	CP_NON_REGULAR,
	CP_COMPRESSED,
	CP_HARDLINK,
	CP_SB_NEED_CP,
	CP_WRONG_PINO,
	CP_NO_SPC_ROLL,
	CP_NODE_NEED_CP,
	CP_FASTBOOT_MODE,
	CP_SPEC_LOG_NUM,
	CP_RECOVER_DIR,
};

enum iostat_type {
	/* WRITE IO */
	APP_DIRECT_IO,			/* app direct write IOs */
	APP_BUFFERED_IO,		/* app buffered write IOs */
	APP_WRITE_IO,			/* app write IOs */
	APP_MAPPED_IO,			/* app mapped IOs */
	FS_DATA_IO,			/* data IOs from kworker/fsync/reclaimer */
	FS_NODE_IO,			/* node IOs from kworker/fsync/reclaimer */
	FS_META_IO,			/* meta IOs from kworker/reclaimer */
	FS_GC_DATA_IO,			/* data IOs from forground gc */
	FS_GC_NODE_IO,			/* node IOs from forground gc */
	FS_CP_DATA_IO,			/* data IOs from checkpoint */
	FS_CP_NODE_IO,			/* node IOs from checkpoint */
	FS_CP_META_IO,			/* meta IOs from checkpoint */

	/* READ IO */
	APP_DIRECT_READ_IO,		/* app direct read IOs */
	APP_BUFFERED_READ_IO,		/* app buffered read IOs */
	APP_READ_IO,			/* app read IOs */
	APP_MAPPED_READ_IO,		/* app mapped read IOs */
	FS_DATA_READ_IO,		/* data read IOs */
	FS_GDATA_READ_IO,		/* data read IOs from background gc */
	FS_CDATA_READ_IO,		/* compressed data read IOs */
	FS_NODE_READ_IO,		/* node read IOs */
	FS_META_READ_IO,		/* meta read IOs */

	/* other */
	FS_DISCARD,			/* discard */
	NR_IO_TYPE,
};

struct f2fs_io_info {
	struct f2fs_sb_info *sbi;	/* f2fs_sb_info pointer */
	nid_t ino;		/* inode number */
	enum page_type type;	/* contains DATA/NODE/META/META_FLUSH */
	enum temp_type temp;	/* contains HOT/WARM/COLD */
	int op;			/* contains REQ_OP_ */
	int op_flags;		/* req_flag_bits */
	block_t new_blkaddr;	/* new block address to be written */
	block_t old_blkaddr;	/* old block address before Cow */
	struct page *page;	/* page to be written */
	struct page *encrypted_page;	/* encrypted page */
	struct page *compressed_page;	/* compressed page */
	struct list_head list;		/* serialize IOs */
	bool submitted;		/* indicate IO submission */
	int need_lock;		/* indicate we need to lock cp_rwsem */
	bool in_list;		/* indicate fio is in io_list */
	bool is_por;		/* indicate IO is from recovery or not */
	bool retry;		/* need to reallocate block address */
	int compr_blocks;	/* # of compressed block addresses */
	bool encrypted;		/* indicate file is encrypted */
	enum iostat_type io_type;	/* io type */
	struct writeback_control *io_wbc; /* writeback control */
	struct bio **bio;		/* bio for ipu */
	sector_t *last_block;		/* last block number in bio */
	unsigned char version;		/* version of the node */
};

struct bio_entry {
	struct bio *bio;
	struct list_head list;
};

#define is_read_io(rw) ((rw) == READ)
struct f2fs_bio_info {
	struct f2fs_sb_info *sbi;	/* f2fs superblock */
	struct bio *bio;		/* bios to merge */
	sector_t last_block_in_bio;	/* last block number */
	struct f2fs_io_info fio;	/* store buffered io info. */
	struct rw_semaphore io_rwsem;	/* blocking op for bio */
	spinlock_t io_lock;		/* serialize DATA/NODE IOs */
	struct list_head io_list;	/* track fios */
	struct list_head bio_list;	/* bio entry list head */
	struct rw_semaphore bio_list_lock;	/* lock to protect bio entry list */
};

#define FDEV(i)				(sbi->devs[i])
#define RDEV(i)				(raw_super->devs[i])
struct f2fs_dev_info {
	struct block_device *bdev;
	char path[MAX_PATH_LEN];
	unsigned int total_segments;
	block_t start_blk;
	block_t end_blk;
#ifdef CONFIG_BLK_DEV_ZONED
	unsigned int nr_blkz;		/* Total number of zones */
	unsigned long *blkz_seq;	/* Bitmap indicating sequential zones */
	block_t *zone_capacity_blocks;  /* Array of zone capacity in blks */
#endif
};

enum inode_type {
	DIR_INODE,			/* for dirty dir inode */
	FILE_INODE,			/* for dirty regular/symlink inode */
	DIRTY_META,			/* for all dirtied inode metadata */
	ATOMIC_FILE,			/* for all atomic files */
	NR_INODE_TYPE,
};

/* for inner inode cache management */
struct inode_management {
	struct radix_tree_root ino_root;	/* ino entry array */
	spinlock_t ino_lock;			/* for ino entry lock */
	struct list_head ino_list;		/* inode list head */
	unsigned long ino_num;			/* number of entries */
};

/* for GC_AT */
struct atgc_management {
	bool atgc_enabled;			/* ATGC is enabled or not */
	struct rb_root_cached root;		/* root of victim rb-tree */
	struct list_head victim_list;		/* linked with all victim entries */
	unsigned int victim_count;		/* victim count in rb-tree */
	unsigned int candidate_ratio;		/* candidate ratio */
	unsigned int max_candidate_count;	/* max candidate count */
	unsigned int age_weight;		/* age weight, vblock_weight = 100 - age_weight */
	unsigned long long age_threshold;	/* age threshold */
};

/* For s_flag in struct f2fs_sb_info */
enum {
	SBI_IS_DIRTY,				/* dirty flag for checkpoint */
	SBI_IS_CLOSE,				/* specify unmounting */
	SBI_NEED_FSCK,				/* need fsck.f2fs to fix */
	SBI_POR_DOING,				/* recovery is doing or not */
	SBI_NEED_SB_WRITE,			/* need to recover superblock */
	SBI_NEED_CP,				/* need to checkpoint */
	SBI_IS_SHUTDOWN,			/* shutdown by ioctl */
	SBI_IS_RECOVERED,			/* recovered orphan/data */
	SBI_CP_DISABLED,			/* CP was disabled last mount */
	SBI_CP_DISABLED_QUICK,			/* CP was disabled quickly */
	SBI_QUOTA_NEED_FLUSH,			/* need to flush quota info in CP */
	SBI_QUOTA_SKIP_FLUSH,			/* skip flushing quota in current CP */
	SBI_QUOTA_NEED_REPAIR,			/* quota file may be corrupted */
	SBI_IS_RESIZEFS,			/* resizefs is in process */
};

enum {
	CP_TIME,
	REQ_TIME,
	DISCARD_TIME,
	GC_TIME,
	DISABLE_TIME,
	UMOUNT_DISCARD_TIMEOUT,
	MAX_TIME,
};

enum {
	GC_NORMAL,
	GC_IDLE_CB,
	GC_IDLE_GREEDY,
	GC_IDLE_AT,
	GC_URGENT_HIGH,
	GC_URGENT_LOW,
};

enum {
	BGGC_MODE_ON,		/* background gc is on */
	BGGC_MODE_OFF,		/* background gc is off */
	BGGC_MODE_SYNC,		/*
				 * background gc is on, migrating blocks
				 * like foreground gc
				 */
};

enum {
	FS_MODE_ADAPTIVE,	/* use both lfs/ssr allocation */
	FS_MODE_LFS,		/* use lfs allocation only */
};

enum {
	WHINT_MODE_OFF,		/* not pass down write hints */
	WHINT_MODE_USER,	/* try to pass down hints given by users */
	WHINT_MODE_FS,		/* pass down hints with F2FS policy */
};

enum {
	ALLOC_MODE_DEFAULT,	/* stay default */
	ALLOC_MODE_REUSE,	/* reuse segments as much as possible */
};

enum fsync_mode {
	FSYNC_MODE_POSIX,	/* fsync follows posix semantics */
	FSYNC_MODE_STRICT,	/* fsync behaves in line with ext4 */
	FSYNC_MODE_NOBARRIER,	/* fsync behaves nobarrier based on posix */
};

enum {
	COMPR_MODE_FS,		/*
				 * automatically compress compression
				 * enabled files
				 */
	COMPR_MODE_USER,	/*
				 * automatical compression is disabled.
				 * user can control the file compression
				 * using ioctls
				 */
};

/*
 * this value is set in page as a private data which indicate that
 * the page is atomically written, and it is in inmem_pages list.
 */
#define ATOMIC_WRITTEN_PAGE		((unsigned long)-1)
#define DUMMY_WRITTEN_PAGE		((unsigned long)-2)

#define IS_ATOMIC_WRITTEN_PAGE(page)			\
		(page_private(page) == ATOMIC_WRITTEN_PAGE)
#define IS_DUMMY_WRITTEN_PAGE(page)			\
		(page_private(page) == DUMMY_WRITTEN_PAGE)

#ifdef CONFIG_F2FS_IO_TRACE
#define IS_IO_TRACED_PAGE(page)			\
		(page_private(page) > 0 &&		\
		 page_private(page) < (unsigned long)PID_MAX_LIMIT)
#else
#define IS_IO_TRACED_PAGE(page) (0)
#endif

/* For compression */
enum compress_algorithm_type {
	COMPRESS_LZO,
	COMPRESS_LZ4,
	COMPRESS_ZSTD,
	COMPRESS_LZORLE,
	COMPRESS_MAX,
};

enum compress_flag {
	COMPRESS_CHKSUM,
	COMPRESS_MAX_FLAG,
};

#define COMPRESS_DATA_RESERVED_SIZE		4
struct compress_data {
	__le32 clen;			/* compressed data size */
	__le32 chksum;			/* compressed data chksum */
	__le32 reserved[COMPRESS_DATA_RESERVED_SIZE];	/* reserved */
	u8 cdata[];			/* compressed data */
};

#define COMPRESS_HEADER_SIZE	(sizeof(struct compress_data))

#define F2FS_COMPRESSED_PAGE_MAGIC	0xF5F2C000

#define	COMPRESS_LEVEL_OFFSET	8

/* compress context */
struct compress_ctx {
	struct inode *inode;		/* inode the context belong to */
	pgoff_t cluster_idx;		/* cluster index number */
	unsigned int cluster_size;	/* page count in cluster */
	unsigned int log_cluster_size;	/* log of cluster size */
	struct page **rpages;		/* pages store raw data in cluster */
	unsigned int nr_rpages;		/* total page number in rpages */
	struct page **cpages;		/* pages store compressed data in cluster */
	unsigned int nr_cpages;		/* total page number in cpages */
	void *rbuf;			/* virtual mapped address on rpages */
	struct compress_data *cbuf;	/* virtual mapped address on cpages */
	size_t rlen;			/* valid data length in rbuf */
	size_t clen;			/* valid data length in cbuf */
	void *private;			/* payload buffer for specified compression algorithm */
	void *private2;			/* extra payload buffer */
};

/* compress context for write IO path */
struct compress_io_ctx {
	u32 magic;			/* magic number to indicate page is compressed */
	struct inode *inode;		/* inode the context belong to */
	struct page **rpages;		/* pages store raw data in cluster */
	unsigned int nr_rpages;		/* total page number in rpages */
	atomic_t pending_pages;		/* in-flight compressed page count */
};

/* Context for decompressing one cluster on the read IO path */
struct decompress_io_ctx {
	u32 magic;			/* magic number to indicate page is compressed */
	struct inode *inode;		/* inode the context belong to */
	pgoff_t cluster_idx;		/* cluster index number */
	unsigned int cluster_size;	/* page count in cluster */
	unsigned int log_cluster_size;	/* log of cluster size */
	struct page **rpages;		/* pages store raw data in cluster */
	unsigned int nr_rpages;		/* total page number in rpages */
	struct page **cpages;		/* pages store compressed data in cluster */
	unsigned int nr_cpages;		/* total page number in cpages */
	struct page **tpages;		/* temp pages to pad holes in cluster */
	void *rbuf;			/* virtual mapped address on rpages */
	struct compress_data *cbuf;	/* virtual mapped address on cpages */
	size_t rlen;			/* valid data length in rbuf */
	size_t clen;			/* valid data length in cbuf */

	/*
	 * The number of compressed pages remaining to be read in this cluster.
	 * This is initially nr_cpages.  It is decremented by 1 each time a page
	 * has been read (or failed to be read).  When it reaches 0, the cluster
	 * is decompressed (or an error is reported).
	 *
	 * If an error occurs before all the pages have been submitted for I/O,
	 * then this will never reach 0.  In this case the I/O submitter is
	 * responsible for calling f2fs_decompress_end_io() instead.
	 */
	atomic_t remaining_pages;

	/*
	 * Number of references to this decompress_io_ctx.
	 *
	 * One reference is held for I/O completion.  This reference is dropped
	 * after the pagecache pages are updated and unlocked -- either after
	 * decompression (and verity if enabled), or after an error.
	 *
	 * In addition, each compressed page holds a reference while it is in a
	 * bio.  These references are necessary prevent compressed pages from
	 * being freed while they are still in a bio.
	 */
	refcount_t refcnt;

	bool failed;			/* IO error occurred before decompression? */
	bool need_verity;		/* need fs-verity verification after decompression? */
	void *private;			/* payload buffer for specified decompression algorithm */
	void *private2;			/* extra payload buffer */
	struct work_struct verity_work;	/* work to verify the decompressed pages */
};

#define NULL_CLUSTER			((unsigned int)(~0))
#define MIN_COMPRESS_LOG_SIZE		2
#define MAX_COMPRESS_LOG_SIZE		8
#define MAX_COMPRESS_WINDOW_SIZE(log_size)	((PAGE_SIZE) << (log_size))

struct f2fs_sb_info {
	struct super_block *sb;			/* pointer to VFS super block */
	struct proc_dir_entry *s_proc;		/* proc entry */
	struct f2fs_super_block *raw_super;	/* raw super block pointer */
	struct rw_semaphore sb_lock;		/* lock for raw super block */
	int valid_super_block;			/* valid super block no */
	unsigned long s_flag;				/* flags for sbi */
	struct mutex writepages;		/* mutex for writepages() */

#ifdef CONFIG_BLK_DEV_ZONED
	unsigned int blocks_per_blkz;		/* F2FS blocks per zone */
	unsigned int log_blocks_per_blkz;	/* log2 F2FS blocks per zone */
#endif

	/* for node-related operations */
	struct f2fs_nm_info *nm_info;		/* node manager */
	struct inode *node_inode;		/* cache node blocks */

	/* for segment-related operations */
	struct f2fs_sm_info *sm_info;		/* segment manager */

	/* for bio operations */
	struct f2fs_bio_info *write_io[NR_PAGE_TYPE];	/* for write bios */
	/* keep migration IO order for LFS mode */
	struct rw_semaphore io_order_lock;
	mempool_t *write_io_dummy;		/* Dummy pages */

	/* for checkpoint */
	struct f2fs_checkpoint *ckpt;		/* raw checkpoint pointer */
	int cur_cp_pack;			/* remain current cp pack */
	spinlock_t cp_lock;			/* for flag in ckpt */
	struct inode *meta_inode;		/* cache meta blocks */
	struct rw_semaphore cp_global_sem;	/* checkpoint procedure lock */
	struct rw_semaphore cp_rwsem;		/* blocking FS operations */
	struct rw_semaphore node_write;		/* locking node writes */
	struct rw_semaphore node_change;	/* locking node change */
	wait_queue_head_t cp_wait;
	unsigned long last_time[MAX_TIME];	/* to store time in jiffies */
	long interval_time[MAX_TIME];		/* to store thresholds */
	struct ckpt_req_control cprc_info;	/* for checkpoint request control */

	struct inode_management im[MAX_INO_ENTRY];	/* manage inode cache */

	spinlock_t fsync_node_lock;		/* for node entry lock */
	struct list_head fsync_node_list;	/* node list head */
	unsigned int fsync_seg_id;		/* sequence id */
	unsigned int fsync_node_num;		/* number of node entries */

	/* for orphan inode, use 0'th array */
	unsigned int max_orphans;		/* max orphan inodes */

	/* for inode management */
	struct list_head inode_list[NR_INODE_TYPE];	/* dirty inode list */
	spinlock_t inode_lock[NR_INODE_TYPE];	/* for dirty inode list lock */
	struct mutex flush_lock;		/* for flush exclusion */

	/* for extent tree cache */
	struct radix_tree_root extent_tree_root;/* cache extent cache entries */
	struct mutex extent_tree_lock;	/* locking extent radix tree */
	struct list_head extent_list;		/* lru list for shrinker */
	spinlock_t extent_lock;			/* locking extent lru list */
	atomic_t total_ext_tree;		/* extent tree count */
	struct list_head zombie_list;		/* extent zombie tree list */
	atomic_t total_zombie_tree;		/* extent zombie tree count */
	atomic_t total_ext_node;		/* extent info count */

	/* basic filesystem units */
	unsigned int log_sectors_per_block;	/* log2 sectors per block */
	unsigned int log_blocksize;		/* log2 block size */
	unsigned int blocksize;			/* block size */
	unsigned int root_ino_num;		/* root inode number*/
	unsigned int node_ino_num;		/* node inode number*/
	unsigned int meta_ino_num;		/* meta inode number*/
	unsigned int log_blocks_per_seg;	/* log2 blocks per segment */
	unsigned int blocks_per_seg;		/* blocks per segment */
	unsigned int segs_per_sec;		/* segments per section */
	unsigned int secs_per_zone;		/* sections per zone */
	unsigned int total_sections;		/* total section count */
	unsigned int total_node_count;		/* total node block count */
	unsigned int total_valid_node_count;	/* valid node block count */
	int dir_level;				/* directory level */
	int readdir_ra;				/* readahead inode in readdir */
	u64 max_io_bytes;			/* max io bytes to merge IOs */

	block_t user_block_count;		/* # of user blocks */
	block_t total_valid_block_count;	/* # of valid blocks */
	block_t discard_blks;			/* discard command candidats */
	block_t last_valid_block_count;		/* for recovery */
	block_t reserved_blocks;		/* configurable reserved blocks */
	block_t current_reserved_blocks;	/* current reserved blocks */

	/* Additional tracking for no checkpoint mode */
	block_t unusable_block_count;		/* # of blocks saved by last cp */

	unsigned int nquota_files;		/* # of quota sysfile */
	struct rw_semaphore quota_sem;		/* blocking cp for flags */

	/* # of pages, see count_type */
	atomic_t nr_pages[NR_COUNT_TYPE];
	/* # of allocated blocks */
	struct percpu_counter alloc_valid_block_count;

	/* writeback control */
	atomic_t wb_sync_req[META];	/* count # of WB_SYNC threads */

	/* valid inode count */
	struct percpu_counter total_valid_inode_count;

	struct f2fs_mount_info mount_opt;	/* mount options */

	/* for cleaning operations */
	struct rw_semaphore gc_lock;		/*
						 * semaphore for GC, avoid
						 * race between GC and GC or CP
						 */
	struct f2fs_gc_kthread	*gc_thread;	/* GC thread */
	struct atgc_management am;		/* atgc management */
	unsigned int cur_victim_sec;		/* current victim section num */
	unsigned int gc_mode;			/* current GC state */
	unsigned int next_victim_seg[2];	/* next segment in victim section */

	/* for skip statistic */
	unsigned int atomic_files;		/* # of opened atomic file */
	unsigned long long skipped_atomic_files[2];	/* FG_GC and BG_GC */
	unsigned long long skipped_gc_rwsem;		/* FG_GC only */

	/* threshold for gc trials on pinned files */
	u64 gc_pin_file_threshold;
	struct rw_semaphore pin_sem;

	/* maximum # of trials to find a victim segment for SSR and GC */
	unsigned int max_victim_search;
	/* migration granularity of garbage collection, unit: segment */
	unsigned int migration_granularity;

	/*
	 * for stat information.
	 * one is for the LFS mode, and the other is for the SSR mode.
	 */
#ifdef CONFIG_F2FS_STAT_FS
	struct f2fs_stat_info *stat_info;	/* FS status information */
	atomic_t meta_count[META_MAX];		/* # of meta blocks */
	unsigned int segment_count[2];		/* # of allocated segments */
	unsigned int block_count[2];		/* # of allocated blocks */
	atomic_t inplace_count;		/* # of inplace update */
	atomic64_t total_hit_ext;		/* # of lookup extent cache */
	atomic64_t read_hit_rbtree;		/* # of hit rbtree extent node */
	atomic64_t read_hit_largest;		/* # of hit largest extent node */
	atomic64_t read_hit_cached;		/* # of hit cached extent node */
	atomic_t inline_xattr;			/* # of inline_xattr inodes */
	atomic_t inline_inode;			/* # of inline_data inodes */
	atomic_t inline_dir;			/* # of inline_dentry inodes */
	atomic_t compr_inode;			/* # of compressed inodes */
	atomic64_t compr_blocks;		/* # of compressed blocks */
	atomic_t vw_cnt;			/* # of volatile writes */
	atomic_t max_aw_cnt;			/* max # of atomic writes */
	atomic_t max_vw_cnt;			/* max # of volatile writes */
	unsigned int io_skip_bggc;		/* skip background gc for in-flight IO */
	unsigned int other_skip_bggc;		/* skip background gc for other reasons */
	unsigned int ndirty_inode[NR_INODE_TYPE];	/* # of dirty inodes */
#endif
	spinlock_t stat_lock;			/* lock for stat operations */

	/* For app/fs IO statistics */
	spinlock_t iostat_lock;
	unsigned long long rw_iostat[NR_IO_TYPE];
	unsigned long long prev_rw_iostat[NR_IO_TYPE];
	bool iostat_enable;
	unsigned long iostat_next_period;
	unsigned int iostat_period_ms;

	/* to attach REQ_META|REQ_FUA flags */
	unsigned int data_io_flag;
	unsigned int node_io_flag;

	/* For sysfs suppport */
	struct kobject s_kobj;			/* /sys/fs/f2fs/<devname> */
	struct completion s_kobj_unregister;

	struct kobject s_stat_kobj;		/* /sys/fs/f2fs/<devname>/stat */
	struct completion s_stat_kobj_unregister;

	/* For shrinker support */
	struct list_head s_list;
	int s_ndevs;				/* number of devices */
	struct f2fs_dev_info *devs;		/* for device list */
	unsigned int dirty_device;		/* for checkpoint data flush */
	spinlock_t dev_lock;			/* protect dirty_device */
	struct mutex umount_mutex;
	unsigned int shrinker_run_no;

	/* For write statistics */
	u64 sectors_written_start;
	u64 kbytes_written;

	/* Reference to checksum algorithm driver via cryptoapi */
	struct crypto_shash *s_chksum_driver;

	/* Precomputed FS UUID checksum for seeding other checksums */
	__u32 s_chksum_seed;

	struct workqueue_struct *post_read_wq;	/* post read workqueue */

	struct kmem_cache *inline_xattr_slab;	/* inline xattr entry */
	unsigned int inline_xattr_slab_size;	/* default inline xattr slab size */

#ifdef CONFIG_F2FS_FS_COMPRESSION
	struct kmem_cache *page_array_slab;	/* page array entry */
	unsigned int page_array_slab_size;	/* default page array slab size */
#endif
};

struct f2fs_private_dio {
	struct inode *inode;
	void *orig_private;
	bio_end_io_t *orig_end_io;
	bool write;
};

#ifdef CONFIG_F2FS_FAULT_INJECTION
#define f2fs_show_injection_info(sbi, type)					\
	printk_ratelimited("%sF2FS-fs (%s) : inject %s in %s of %pS\n",	\
		KERN_INFO, sbi->sb->s_id,				\
		f2fs_fault_name[type],					\
		__func__, __builtin_return_address(0))
static inline bool time_to_inject(struct f2fs_sb_info *sbi, int type)
{
	struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;

	if (!ffi->inject_rate)
		return false;

	if (!IS_FAULT_SET(ffi, type))
		return false;

	atomic_inc(&ffi->inject_ops);
	if (atomic_read(&ffi->inject_ops) >= ffi->inject_rate) {
		atomic_set(&ffi->inject_ops, 0);
		return true;
	}
	return false;
}
#else
#define f2fs_show_injection_info(sbi, type) do { } while (0)
static inline bool time_to_inject(struct f2fs_sb_info *sbi, int type)
{
	return false;
}
#endif

/*
 * Test if the mounted volume is a multi-device volume.
 *   - For a single regular disk volume, sbi->s_ndevs is 0.
 *   - For a single zoned disk volume, sbi->s_ndevs is 1.
 *   - For a multi-device volume, sbi->s_ndevs is always 2 or more.
 */
static inline bool f2fs_is_multi_device(struct f2fs_sb_info *sbi)
{
	return sbi->s_ndevs > 1;
}

static inline void f2fs_update_time(struct f2fs_sb_info *sbi, int type)
{
	unsigned long now = jiffies;

	sbi->last_time[type] = now;

	/* DISCARD_TIME and GC_TIME are based on REQ_TIME */
	if (type == REQ_TIME) {
		sbi->last_time[DISCARD_TIME] = now;
		sbi->last_time[GC_TIME] = now;
	}
}

static inline bool f2fs_time_over(struct f2fs_sb_info *sbi, int type)
{
	unsigned long interval = sbi->interval_time[type] * HZ;

	return time_after(jiffies, sbi->last_time[type] + interval);
}

static inline unsigned int f2fs_time_to_wait(struct f2fs_sb_info *sbi,
						int type)
{
	unsigned long interval = sbi->interval_time[type] * HZ;
	unsigned int wait_ms = 0;
	long delta;

	delta = (sbi->last_time[type] + interval) - jiffies;
	if (delta > 0)
		wait_ms = jiffies_to_msecs(delta);

	return wait_ms;
}

/*
 * Inline functions
 */
static inline u32 __f2fs_crc32(struct f2fs_sb_info *sbi, u32 crc,
			      const void *address, unsigned int length)
{
	struct {
		struct shash_desc shash;
		char ctx[4];
	} desc;
	int err;

	BUG_ON(crypto_shash_descsize(sbi->s_chksum_driver) != sizeof(desc.ctx));

	desc.shash.tfm = sbi->s_chksum_driver;
	*(u32 *)desc.ctx = crc;

	err = crypto_shash_update(&desc.shash, address, length);
	BUG_ON(err);

	return *(u32 *)desc.ctx;
}

static inline u32 f2fs_crc32(struct f2fs_sb_info *sbi, const void *address,
			   unsigned int length)
{
	return __f2fs_crc32(sbi, F2FS_SUPER_MAGIC, address, length);
}

static inline bool f2fs_crc_valid(struct f2fs_sb_info *sbi, __u32 blk_crc,
				  void *buf, size_t buf_size)
{
	return f2fs_crc32(sbi, buf, buf_size) == blk_crc;
}

static inline u32 f2fs_chksum(struct f2fs_sb_info *sbi, u32 crc,
			      const void *address, unsigned int length)
{
	return __f2fs_crc32(sbi, crc, address, length);
}

static inline struct f2fs_inode_info *F2FS_I(struct inode *inode)
{
	return container_of(inode, struct f2fs_inode_info, vfs_inode);
}

static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb)
{
	return sb->s_fs_info;
}

static inline struct f2fs_sb_info *F2FS_I_SB(struct inode *inode)
{
	return F2FS_SB(inode->i_sb);
}

static inline struct f2fs_sb_info *F2FS_M_SB(struct address_space *mapping)
{
	return F2FS_I_SB(mapping->host);
}

static inline struct f2fs_sb_info *F2FS_P_SB(struct page *page)
{
	return F2FS_M_SB(page_file_mapping(page));
}

static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
{
	return (struct f2fs_super_block *)(sbi->raw_super);
}

static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
{
	return (struct f2fs_checkpoint *)(sbi->ckpt);
}

static inline struct f2fs_node *F2FS_NODE(struct page *page)
{
	return (struct f2fs_node *)page_address(page);
}

static inline struct f2fs_inode *F2FS_INODE(struct page *page)
{
	return &((struct f2fs_node *)page_address(page))->i;
}

static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi)
{
	return (struct f2fs_nm_info *)(sbi->nm_info);
}

static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi)
{
	return (struct f2fs_sm_info *)(sbi->sm_info);
}

static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi)
{
	return (struct sit_info *)(SM_I(sbi)->sit_info);
}

static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi)
{
	return (struct free_segmap_info *)(SM_I(sbi)->free_info);
}

static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi)
{
	return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info);
}

static inline struct address_space *META_MAPPING(struct f2fs_sb_info *sbi)
{
	return sbi->meta_inode->i_mapping;
}

static inline struct address_space *NODE_MAPPING(struct f2fs_sb_info *sbi)
{
	return sbi->node_inode->i_mapping;
}

static inline bool is_sbi_flag_set(struct f2fs_sb_info *sbi, unsigned int type)
{
	return test_bit(type, &sbi->s_flag);
}

static inline void set_sbi_flag(struct f2fs_sb_info *sbi, unsigned int type)
{
	set_bit(type, &sbi->s_flag);
}

static inline void clear_sbi_flag(struct f2fs_sb_info *sbi, unsigned int type)
{
	clear_bit(type, &sbi->s_flag);
}

static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp)
{
	return le64_to_cpu(cp->checkpoint_ver);
}

static inline unsigned long f2fs_qf_ino(struct super_block *sb, int type)
{
	if (type < F2FS_MAX_QUOTAS)
		return le32_to_cpu(F2FS_SB(sb)->raw_super->qf_ino[type]);
	return 0;
}

static inline __u64 cur_cp_crc(struct f2fs_checkpoint *cp)
{
	size_t crc_offset = le32_to_cpu(cp->checksum_offset);
	return le32_to_cpu(*((__le32 *)((unsigned char *)cp + crc_offset)));
}

static inline bool __is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
{
	unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);

	return ckpt_flags & f;
}

static inline bool is_set_ckpt_flags(struct f2fs_sb_info *sbi, unsigned int f)
{
	return __is_set_ckpt_flags(F2FS_CKPT(sbi), f);
}

static inline void __set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
{
	unsigned int ckpt_flags;

	ckpt_flags = le32_to_cpu(cp->ckpt_flags);
	ckpt_flags |= f;
	cp->ckpt_flags = cpu_to_le32(ckpt_flags);
}

static inline void set_ckpt_flags(struct f2fs_sb_info *sbi, unsigned int f)
{
	unsigned long flags;

	spin_lock_irqsave(&sbi->cp_lock, flags);
	__set_ckpt_flags(F2FS_CKPT(sbi), f);
	spin_unlock_irqrestore(&sbi->cp_lock, flags);
}

static inline void __clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
{
	unsigned int ckpt_flags;

	ckpt_flags = le32_to_cpu(cp->ckpt_flags);
	ckpt_flags &= (~f);
	cp->ckpt_flags = cpu_to_le32(ckpt_flags);
}

static inline void clear_ckpt_flags(struct f2fs_sb_info *sbi, unsigned int f)
{
	unsigned long flags;

	spin_lock_irqsave(&sbi->cp_lock, flags);
	__clear_ckpt_flags(F2FS_CKPT(sbi), f);
	spin_unlock_irqrestore(&sbi->cp_lock, flags);
}

static inline void disable_nat_bits(struct f2fs_sb_info *sbi, bool lock)
{
	unsigned long flags;
	unsigned char *nat_bits;

	/*
	 * In order to re-enable nat_bits we need to call fsck.f2fs by
	 * set_sbi_flag(sbi, SBI_NEED_FSCK). But it may give huge cost,
	 * so let's rely on regular fsck or unclean shutdown.
	 */

	if (lock)
		spin_lock_irqsave(&sbi->cp_lock, flags);
	__clear_ckpt_flags(F2FS_CKPT(sbi), CP_NAT_BITS_FLAG);
	nat_bits = NM_I(sbi)->nat_bits;
	NM_I(sbi)->nat_bits = NULL;
	if (lock)
		spin_unlock_irqrestore(&sbi->cp_lock, flags);

	kvfree(nat_bits);
}

static inline bool enabled_nat_bits(struct f2fs_sb_info *sbi,
					struct cp_control *cpc)
{
	bool set = is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG);

	return (cpc) ? (cpc->reason & CP_UMOUNT) && set : set;
}

static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
{
	down_read(&sbi->cp_rwsem);
}

static inline int f2fs_trylock_op(struct f2fs_sb_info *sbi)
{
	return down_read_trylock(&sbi->cp_rwsem);
}

static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi)
{
	up_read(&sbi->cp_rwsem);
}

static inline void f2fs_lock_all(struct f2fs_sb_info *sbi)
{
	down_write(&sbi->cp_rwsem);
}

static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi)
{
	up_write(&sbi->cp_rwsem);
}

static inline int __get_cp_reason(struct f2fs_sb_info *sbi)
{
	int reason = CP_SYNC;

	if (test_opt(sbi, FASTBOOT))
		reason = CP_FASTBOOT;
	if (is_sbi_flag_set(sbi, SBI_IS_CLOSE))
		reason = CP_UMOUNT;
	return reason;
}

static inline bool __remain_node_summaries(int reason)
{
	return (reason & (CP_UMOUNT | CP_FASTBOOT));
}

static inline bool __exist_node_summaries(struct f2fs_sb_info *sbi)
{
	return (is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG) ||
			is_set_ckpt_flags(sbi, CP_FASTBOOT_FLAG));
}

/*
 * Check whether the inode has blocks or not
 */
static inline int F2FS_HAS_BLOCKS(struct inode *inode)
{
	block_t xattr_block = F2FS_I(inode)->i_xattr_nid ? 1 : 0;

	return (inode->i_blocks >> F2FS_LOG_SECTORS_PER_BLOCK) > xattr_block;
}

static inline bool f2fs_has_xattr_block(unsigned int ofs)
{
	return ofs == XATTR_NODE_OFFSET;
}

static inline bool __allow_reserved_blocks(struct f2fs_sb_info *sbi,
					struct inode *inode, bool cap)
{
	if (!inode)
		return true;
	if (!test_opt(sbi, RESERVE_ROOT))
		return false;
	if (IS_NOQUOTA(inode))
		return true;
	if (uid_eq(F2FS_OPTION(sbi).s_resuid, current_fsuid()))
		return true;
	if (!gid_eq(F2FS_OPTION(sbi).s_resgid, GLOBAL_ROOT_GID) &&
					in_group_p(F2FS_OPTION(sbi).s_resgid))
		return true;
	if (cap && capable(CAP_SYS_RESOURCE))
		return true;
	return false;
}

static inline void f2fs_i_blocks_write(struct inode *, block_t, bool, bool);
static inline int inc_valid_block_count(struct f2fs_sb_info *sbi,
				 struct inode *inode, blkcnt_t *count)
{
	blkcnt_t diff = 0, release = 0;
	block_t avail_user_block_count;
	int ret;

	ret = dquot_reserve_block(inode, *count);
	if (ret)
		return ret;

	if (time_to_inject(sbi, FAULT_BLOCK)) {
		f2fs_show_injection_info(sbi, FAULT_BLOCK);
		release = *count;
		goto release_quota;
	}

	/*
	 * let's increase this in prior to actual block count change in order
	 * for f2fs_sync_file to avoid data races when deciding checkpoint.
	 */
	percpu_counter_add(&sbi->alloc_valid_block_count, (*count));

	spin_lock(&sbi->stat_lock);
	sbi->total_valid_block_count += (block_t)(*count);
	avail_user_block_count = sbi->user_block_count -
					sbi->current_reserved_blocks;

	if (!__allow_reserved_blocks(sbi, inode, true))
		avail_user_block_count -= F2FS_OPTION(sbi).root_reserved_blocks;
	if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
		if (avail_user_block_count > sbi->unusable_block_count)
			avail_user_block_count -= sbi->unusable_block_count;
		else
			avail_user_block_count = 0;
	}
	if (unlikely(sbi->total_valid_block_count > avail_user_block_count)) {
		diff = sbi->total_valid_block_count - avail_user_block_count;
		if (diff > *count)
			diff = *count;
		*count -= diff;
		release = diff;
		sbi->total_valid_block_count -= diff;
		if (!*count) {
			spin_unlock(&sbi->stat_lock);
			goto enospc;
		}
	}
	spin_unlock(&sbi->stat_lock);

	if (unlikely(release)) {
		percpu_counter_sub(&sbi->alloc_valid_block_count, release);
		dquot_release_reservation_block(inode, release);
	}
	f2fs_i_blocks_write(inode, *count, true, true);
	return 0;

enospc:
	percpu_counter_sub(&sbi->alloc_valid_block_count, release);
release_quota:
	dquot_release_reservation_block(inode, release);
	return -ENOSPC;
}

__printf(2, 3)
void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...);

#define f2fs_err(sbi, fmt, ...)						\
	f2fs_printk(sbi, KERN_ERR fmt, ##__VA_ARGS__)
#define f2fs_warn(sbi, fmt, ...)					\
	f2fs_printk(sbi, KERN_WARNING fmt, ##__VA_ARGS__)
#define f2fs_notice(sbi, fmt, ...)					\
	f2fs_printk(sbi, KERN_NOTICE fmt, ##__VA_ARGS__)
#define f2fs_info(sbi, fmt, ...)					\
	f2fs_printk(sbi, KERN_INFO fmt, ##__VA_ARGS__)
#define f2fs_debug(sbi, fmt, ...)					\
	f2fs_printk(sbi, KERN_DEBUG fmt, ##__VA_ARGS__)

static inline void dec_valid_block_count(struct f2fs_sb_info *sbi,
						struct inode *inode,
						block_t count)
{
	blkcnt_t sectors = count << F2FS_LOG_SECTORS_PER_BLOCK;

	spin_lock(&sbi->stat_lock);
	f2fs_bug_on(sbi, sbi->total_valid_block_count < (block_t) count);
	sbi->total_valid_block_count -= (block_t)count;
	if (sbi->reserved_blocks &&
		sbi->current_reserved_blocks < sbi->reserved_blocks)
		sbi->current_reserved_blocks = min(sbi->reserved_blocks,
					sbi->current_reserved_blocks + count);
	spin_unlock(&sbi->stat_lock);
	if (unlikely(inode->i_blocks < sectors)) {
		f2fs_warn(sbi, "Inconsistent i_blocks, ino:%lu, iblocks:%llu, sectors:%llu",
			  inode->i_ino,
			  (unsigned long long)inode->i_blocks,
			  (unsigned long long)sectors);
		set_sbi_flag(sbi, SBI_NEED_FSCK);
		return;
	}
	f2fs_i_blocks_write(inode, count, false, true);
}

static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
{
	atomic_inc(&sbi->nr_pages[count_type]);

	if (count_type == F2FS_DIRTY_DENTS ||
			count_type == F2FS_DIRTY_NODES ||
			count_type == F2FS_DIRTY_META ||
			count_type == F2FS_DIRTY_QDATA ||
			count_type == F2FS_DIRTY_IMETA)
		set_sbi_flag(sbi, SBI_IS_DIRTY);
}

static inline void inode_inc_dirty_pages(struct inode *inode)
{
	atomic_inc(&F2FS_I(inode)->dirty_pages);
	inc_page_count(F2FS_I_SB(inode), S_ISDIR(inode->i_mode) ?
				F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA);
	if (IS_NOQUOTA(inode))
		inc_page_count(F2FS_I_SB(inode), F2FS_DIRTY_QDATA);
}

static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
{
	atomic_dec(&sbi->nr_pages[count_type]);
}

static inline void inode_dec_dirty_pages(struct inode *inode)
{
	if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
			!S_ISLNK(inode->i_mode))
		return;

	atomic_dec(&F2FS_I(inode)->dirty_pages);
	dec_page_count(F2FS_I_SB(inode), S_ISDIR(inode->i_mode) ?
				F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA);
	if (IS_NOQUOTA(inode))
		dec_page_count(F2FS_I_SB(inode), F2FS_DIRTY_QDATA);
}

static inline s64 get_pages(struct f2fs_sb_info *sbi, int count_type)
{
	return atomic_read(&sbi->nr_pages[count_type]);
}

static inline int get_dirty_pages(struct inode *inode)
{
	return atomic_read(&F2FS_I(inode)->dirty_pages);
}

static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type)
{
	unsigned int pages_per_sec = sbi->segs_per_sec * sbi->blocks_per_seg;
	unsigned int segs = (get_pages(sbi, block_type) + pages_per_sec - 1) >>
						sbi->log_blocks_per_seg;

	return segs / sbi->segs_per_sec;
}

static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
{
	return sbi->total_valid_block_count;
}

static inline block_t discard_blocks(struct f2fs_sb_info *sbi)
{
	return sbi->discard_blks;
}

static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
{
	struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);

	/* return NAT or SIT bitmap */
	if (flag == NAT_BITMAP)
		return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
	else if (flag == SIT_BITMAP)
		return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);

	return 0;
}

static inline block_t __cp_payload(struct f2fs_sb_info *sbi)
{
	return le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
}

static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
{
	struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
	int offset;

	if (is_set_ckpt_flags(sbi, CP_LARGE_NAT_BITMAP_FLAG)) {
		offset = (flag == SIT_BITMAP) ?
			le32_to_cpu(ckpt->nat_ver_bitmap_bytesize) : 0;
		/*
		 * if large_nat_bitmap feature is enabled, leave checksum
		 * protection for all nat/sit bitmaps.
		 */
		return &ckpt->sit_nat_version_bitmap + offset + sizeof(__le32);
	}

	if (__cp_payload(sbi) > 0) {
		if (flag == NAT_BITMAP)
			return &ckpt->sit_nat_version_bitmap;
		else
			return (unsigned char *)ckpt + F2FS_BLKSIZE;
	} else {
		offset = (flag == NAT_BITMAP) ?
			le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0;
		return &ckpt->sit_nat_version_bitmap + offset;
	}
}

static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
{
	block_t start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);

	if (sbi->cur_cp_pack == 2)
		start_addr += sbi->blocks_per_seg;
	return start_addr;
}

static inline block_t __start_cp_next_addr(struct f2fs_sb_info *sbi)
{
	block_t start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);

	if (sbi->cur_cp_pack == 1)
		start_addr += sbi->blocks_per_seg;
	return start_addr;
}

static inline void __set_cp_next_pack(struct f2fs_sb_info *sbi)
{
	sbi->cur_cp_pack = (sbi->cur_cp_pack == 1) ? 2 : 1;
}

static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
{
	return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
}

static inline int inc_valid_node_count(struct f2fs_sb_info *sbi,
					struct inode *inode, bool is_inode)
{
	block_t	valid_block_count;
	unsigned int valid_node_count, user_block_count;
	int err;

	if (is_inode) {
		if (inode) {
			err = dquot_alloc_inode(inode);
			if (err)
				return err;
		}
	} else {
		err = dquot_reserve_block(inode, 1);
		if (err)
			return err;
	}

	if (time_to_inject(sbi, FAULT_BLOCK)) {
		f2fs_show_injection_info(sbi, FAULT_BLOCK);
		goto enospc;
	}

	spin_lock(&sbi->stat_lock);

	valid_block_count = sbi->total_valid_block_count +
					sbi->current_reserved_blocks + 1;

	if (!__allow_reserved_blocks(sbi, inode, false))
		valid_block_count += F2FS_OPTION(sbi).root_reserved_blocks;
	user_block_count = sbi->user_block_count;
	if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
		user_block_count -= sbi->unusable_block_count;

	if (unlikely(valid_block_count > user_block_count)) {
		spin_unlock(&sbi->stat_lock);
		goto enospc;
	}

	valid_node_count = sbi->total_valid_node_count + 1;
	if (unlikely(valid_node_count > sbi->total_node_count)) {
		spin_unlock(&sbi->stat_lock);
		goto enospc;
	}

	sbi->total_valid_node_count++;
	sbi->total_valid_block_count++;
	spin_unlock(&sbi->stat_lock);

	if (inode) {
		if (is_inode)
			f2fs_mark_inode_dirty_sync(inode, true);
		else
			f2fs_i_blocks_write(inode, 1, true, true);
	}

	percpu_counter_inc(&sbi->alloc_valid_block_count);
	return 0;

enospc:
	if (is_inode) {
		if (inode)
			dquot_free_inode(inode);
	} else {
		dquot_release_reservation_block(inode, 1);
	}
	return -ENOSPC;
}

static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
					struct inode *inode, bool is_inode)
{
	spin_lock(&sbi->stat_lock);

	f2fs_bug_on(sbi, !sbi->total_valid_block_count);
	f2fs_bug_on(sbi, !sbi->total_valid_node_count);

	sbi->total_valid_node_count--;
	sbi->total_valid_block_count--;
	if (sbi->reserved_blocks &&
		sbi->current_reserved_blocks < sbi->reserved_blocks)
		sbi->current_reserved_blocks++;

	spin_unlock(&sbi->stat_lock);

	if (is_inode) {
		dquot_free_inode(inode);
	} else {
		if (unlikely(inode->i_blocks == 0)) {
			f2fs_warn(sbi, "dec_valid_node_count: inconsistent i_blocks, ino:%lu, iblocks:%llu",
				  inode->i_ino,
				  (unsigned long long)inode->i_blocks);
			set_sbi_flag(sbi, SBI_NEED_FSCK);
			return;
		}
		f2fs_i_blocks_write(inode, 1, false, true);
	}
}

static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
{
	return sbi->total_valid_node_count;
}

static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
{
	percpu_counter_inc(&sbi->total_valid_inode_count);
}

static inline void dec_valid_inode_count(struct f2fs_sb_info *sbi)
{
	percpu_counter_dec(&sbi->total_valid_inode_count);
}

static inline s64 valid_inode_count(struct f2fs_sb_info *sbi)
{
	return percpu_counter_sum_positive(&sbi->total_valid_inode_count);
}

static inline struct page *f2fs_grab_cache_page(struct address_space *mapping,
						pgoff_t index, bool for_write)
{
	struct page *page;

	if (IS_ENABLED(CONFIG_F2FS_FAULT_INJECTION)) {
		if (!for_write)
			page = find_get_page_flags(mapping, index,
							FGP_LOCK | FGP_ACCESSED);
		else
			page = find_lock_page(mapping, index);
		if (page)
			return page;

		if (time_to_inject(F2FS_M_SB(mapping), FAULT_PAGE_ALLOC)) {
			f2fs_show_injection_info(F2FS_M_SB(mapping),
							FAULT_PAGE_ALLOC);
			return NULL;
		}
	}

	if (!for_write)
		return grab_cache_page(mapping, index);
	return grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS);
}

static inline struct page *f2fs_pagecache_get_page(
				struct address_space *mapping, pgoff_t index,
				int fgp_flags, gfp_t gfp_mask)
{
	if (time_to_inject(F2FS_M_SB(mapping), FAULT_PAGE_GET)) {
		f2fs_show_injection_info(F2FS_M_SB(mapping), FAULT_PAGE_GET);
		return NULL;
	}

	return pagecache_get_page(mapping, index, fgp_flags, gfp_mask);
}

static inline void f2fs_copy_page(struct page *src, struct page *dst)
{
	char *src_kaddr = kmap(src);
	char *dst_kaddr = kmap(dst);

	memcpy(dst_kaddr, src_kaddr, PAGE_SIZE);
	kunmap(dst);
	kunmap(src);
}

static inline void f2fs_put_page(struct page *page, int unlock)
{
	if (!page)
		return;

	if (unlock) {
		f2fs_bug_on(F2FS_P_SB(page), !PageLocked(page));
		unlock_page(page);
	}
	put_page(page);
}

static inline void f2fs_put_dnode(struct dnode_of_data *dn)
{
	if (dn->node_page)
		f2fs_put_page(dn->node_page, 1);
	if (dn->inode_page && dn->node_page != dn->inode_page)
		f2fs_put_page(dn->inode_page, 0);
	dn->node_page = NULL;
	dn->inode_page = NULL;
}

static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
					size_t size)
{
	return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, NULL);
}

static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep,
						gfp_t flags)
{
	void *entry;

	entry = kmem_cache_alloc(cachep, flags);
	if (!entry)
		entry = kmem_cache_alloc(cachep, flags | __GFP_NOFAIL);
	return entry;
}

static inline bool is_inflight_io(struct f2fs_sb_info *sbi, int type)
{
	if (get_pages(sbi, F2FS_RD_DATA) || get_pages(sbi, F2FS_RD_NODE) ||
		get_pages(sbi, F2FS_RD_META) || get_pages(sbi, F2FS_WB_DATA) ||
		get_pages(sbi, F2FS_WB_CP_DATA) ||
		get_pages(sbi, F2FS_DIO_READ) ||
		get_pages(sbi, F2FS_DIO_WRITE))
		return true;

	if (type != DISCARD_TIME && SM_I(sbi) && SM_I(sbi)->dcc_info &&
			atomic_read(&SM_I(sbi)->dcc_info->queued_discard))
		return true;

	if (SM_I(sbi) && SM_I(sbi)->fcc_info &&
			atomic_read(&SM_I(sbi)->fcc_info->queued_flush))
		return true;
	return false;
}

static inline bool is_idle(struct f2fs_sb_info *sbi, int type)
{
	if (sbi->gc_mode == GC_URGENT_HIGH)
		return true;

	if (is_inflight_io(sbi, type))
		return false;

	if (sbi->gc_mode == GC_URGENT_LOW &&
			(type == DISCARD_TIME || type == GC_TIME))
		return true;

	return f2fs_time_over(sbi, type);
}

static inline void f2fs_radix_tree_insert(struct radix_tree_root *root,
				unsigned long index, void *item)
{
	while (radix_tree_insert(root, index, item))
		cond_resched();
}

#define RAW_IS_INODE(p)	((p)->footer.nid == (p)->footer.ino)

static inline bool IS_INODE(struct page *page)
{
	struct f2fs_node *p = F2FS_NODE(page);

	return RAW_IS_INODE(p);
}

static inline int offset_in_addr(struct f2fs_inode *i)
{
	return (i->i_inline & F2FS_EXTRA_ATTR) ?
			(le16_to_cpu(i->i_extra_isize) / sizeof(__le32)) : 0;
}

static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
{
	return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr;
}

static inline int f2fs_has_extra_attr(struct inode *inode);
static inline block_t data_blkaddr(struct inode *inode,
			struct page *node_page, unsigned int offset)
{
	struct f2fs_node *raw_node;
	__le32 *addr_array;
	int base = 0;
	bool is_inode = IS_INODE(node_page);

	raw_node = F2FS_NODE(node_page);

	if (is_inode) {
		if (!inode)
			/* from GC path only */
			base = offset_in_addr(&raw_node->i);
		else if (f2fs_has_extra_attr(inode))
			base = get_extra_isize(inode);
	}

	addr_array = blkaddr_in_node(raw_node);
	return le32_to_cpu(addr_array[base + offset]);
}

static inline block_t f2fs_data_blkaddr(struct dnode_of_data *dn)
{
	return data_blkaddr(dn->inode, dn->node_page, dn->ofs_in_node);
}

static inline int f2fs_test_bit(unsigned int nr, char *addr)
{
	int mask;

	addr += (nr >> 3);
	mask = 1 << (7 - (nr & 0x07));
	return mask & *addr;
}

static inline void f2fs_set_bit(unsigned int nr, char *addr)
{
	int mask;

	addr += (nr >> 3);
	mask = 1 << (7 - (nr & 0x07));
	*addr |= mask;
}

static inline void f2fs_clear_bit(unsigned int nr, char *addr)
{
	int mask;

	addr += (nr >> 3);
	mask = 1 << (7 - (nr & 0x07));
	*addr &= ~mask;
}

static inline int f2fs_test_and_set_bit(unsigned int nr, char *addr)
{
	int mask;
	int ret;

	addr += (nr >> 3);
	mask = 1 << (7 - (nr & 0x07));
	ret = mask & *addr;
	*addr |= mask;
	return ret;
}

static inline int f2fs_test_and_clear_bit(unsigned int nr, char *addr)
{
	int mask;
	int ret;

	addr += (nr >> 3);
	mask = 1 << (7 - (nr & 0x07));
	ret = mask & *addr;
	*addr &= ~mask;
	return ret;
}

static inline void f2fs_change_bit(unsigned int nr, char *addr)
{
	int mask;

	addr += (nr >> 3);
	mask = 1 << (7 - (nr & 0x07));
	*addr ^= mask;
}

/*
 * On-disk inode flags (f2fs_inode::i_flags)
 */
#define F2FS_COMPR_FL			0x00000004 /* Compress file */
#define F2FS_SYNC_FL			0x00000008 /* Synchronous updates */
#define F2FS_IMMUTABLE_FL		0x00000010 /* Immutable file */
#define F2FS_APPEND_FL			0x00000020 /* writes to file may only append */
#define F2FS_NODUMP_FL			0x00000040 /* do not dump file */
#define F2FS_NOATIME_FL			0x00000080 /* do not update atime */
#define F2FS_NOCOMP_FL			0x00000400 /* Don't compress */
#define F2FS_INDEX_FL			0x00001000 /* hash-indexed directory */
#define F2FS_DIRSYNC_FL			0x00010000 /* dirsync behaviour (directories only) */
#define F2FS_PROJINHERIT_FL		0x20000000 /* Create with parents projid */
#define F2FS_CASEFOLD_FL		0x40000000 /* Casefolded file */

/* Flags that should be inherited by new inodes from their parent. */
#define F2FS_FL_INHERITED (F2FS_SYNC_FL | F2FS_NODUMP_FL | F2FS_NOATIME_FL | \
			   F2FS_DIRSYNC_FL | F2FS_PROJINHERIT_FL | \
			   F2FS_CASEFOLD_FL | F2FS_COMPR_FL | F2FS_NOCOMP_FL)

/* Flags that are appropriate for regular files (all but dir-specific ones). */
#define F2FS_REG_FLMASK		(~(F2FS_DIRSYNC_FL | F2FS_PROJINHERIT_FL | \
				F2FS_CASEFOLD_FL))

/* Flags that are appropriate for non-directories/regular files. */
#define F2FS_OTHER_FLMASK	(F2FS_NODUMP_FL | F2FS_NOATIME_FL)

static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags)
{
	if (S_ISDIR(mode))
		return flags;
	else if (S_ISREG(mode))
		return flags & F2FS_REG_FLMASK;
	else
		return flags & F2FS_OTHER_FLMASK;
}

static inline void __mark_inode_dirty_flag(struct inode *inode,
						int flag, bool set)
{
	switch (flag) {
	case FI_INLINE_XATTR:
	case FI_INLINE_DATA:
	case FI_INLINE_DENTRY:
	case FI_NEW_INODE:
		if (set)
			return;
		fallthrough;
	case FI_DATA_EXIST:
	case FI_INLINE_DOTS:
	case FI_PIN_FILE:
		f2fs_mark_inode_dirty_sync(inode, true);
	}
}

static inline void set_inode_flag(struct inode *inode, int flag)
{
	set_bit(flag, F2FS_I(inode)->flags);
	__mark_inode_dirty_flag(inode, flag, true);
}

static inline int is_inode_flag_set(struct inode *inode, int flag)
{
	return test_bit(flag, F2FS_I(inode)->flags);
}

static inline void clear_inode_flag(struct inode *inode, int flag)
{
	clear_bit(flag, F2FS_I(inode)->flags);
	__mark_inode_dirty_flag(inode, flag, false);
}

static inline bool f2fs_verity_in_progress(struct inode *inode)
{
	return IS_ENABLED(CONFIG_FS_VERITY) &&
	       is_inode_flag_set(inode, FI_VERITY_IN_PROGRESS);
}

static inline void set_acl_inode(struct inode *inode, umode_t mode)
{
	F2FS_I(inode)->i_acl_mode = mode;
	set_inode_flag(inode, FI_ACL_MODE);
	f2fs_mark_inode_dirty_sync(inode, false);
}

static inline void f2fs_i_links_write(struct inode *inode, bool inc)
{
	if (inc)
		inc_nlink(inode);
	else
		drop_nlink(inode);
	f2fs_mark_inode_dirty_sync(inode, true);
}

static inline void f2fs_i_blocks_write(struct inode *inode,
					block_t diff, bool add, bool claim)
{
	bool clean = !is_inode_flag_set(inode, FI_DIRTY_INODE);
	bool recover = is_inode_flag_set(inode, FI_AUTO_RECOVER);

	/* add = 1, claim = 1 should be dquot_reserve_block in pair */
	if (add) {
		if (claim)
			dquot_claim_block(inode, diff);
		else
			dquot_alloc_block_nofail(inode, diff);
	} else {
		dquot_free_block(inode, diff);
	}

	f2fs_mark_inode_dirty_sync(inode, true);
	if (clean || recover)
		set_inode_flag(inode, FI_AUTO_RECOVER);
}

static inline void f2fs_i_size_write(struct inode *inode, loff_t i_size)
{
	bool clean = !is_inode_flag_set(inode, FI_DIRTY_INODE);
	bool recover = is_inode_flag_set(inode, FI_AUTO_RECOVER);

	if (i_size_read(inode) == i_size)
		return;

	i_size_write(inode, i_size);
	f2fs_mark_inode_dirty_sync(inode, true);
	if (clean || recover)
		set_inode_flag(inode, FI_AUTO_RECOVER);
}

static inline void f2fs_i_depth_write(struct inode *inode, unsigned int depth)
{
	F2FS_I(inode)->i_current_depth = depth;
	f2fs_mark_inode_dirty_sync(inode, true);
}

static inline void f2fs_i_gc_failures_write(struct inode *inode,
					unsigned int count)
{
	F2FS_I(inode)->i_gc_failures[GC_FAILURE_PIN] = count;
	f2fs_mark_inode_dirty_sync(inode, true);
}

static inline void f2fs_i_xnid_write(struct inode *inode, nid_t xnid)
{
	F2FS_I(inode)->i_xattr_nid = xnid;
	f2fs_mark_inode_dirty_sync(inode, true);
}

static inline void f2fs_i_pino_write(struct inode *inode, nid_t pino)
{
	F2FS_I(inode)->i_pino = pino;
	f2fs_mark_inode_dirty_sync(inode, true);
}

static inline void get_inline_info(struct inode *inode, struct f2fs_inode *ri)
{
	struct f2fs_inode_info *fi = F2FS_I(inode);

	if (ri->i_inline & F2FS_INLINE_XATTR)
		set_bit(FI_INLINE_XATTR, fi->flags);
	if (ri->i_inline & F2FS_INLINE_DATA)
		set_bit(FI_INLINE_DATA, fi->flags);
	if (ri->i_inline & F2FS_INLINE_DENTRY)
		set_bit(FI_INLINE_DENTRY, fi->flags);
	if (ri->i_inline & F2FS_DATA_EXIST)
		set_bit(FI_DATA_EXIST, fi->flags);
	if (ri->i_inline & F2FS_INLINE_DOTS)
		set_bit(FI_INLINE_DOTS, fi->flags);
	if (ri->i_inline & F2FS_EXTRA_ATTR)
		set_bit(FI_EXTRA_ATTR, fi->flags);
	if (ri->i_inline & F2FS_PIN_FILE)
		set_bit(FI_PIN_FILE, fi->flags);
}

static inline void set_raw_inline(struct inode *inode, struct f2fs_inode *ri)
{
	ri->i_inline = 0;

	if (is_inode_flag_set(inode, FI_INLINE_XATTR))
		ri->i_inline |= F2FS_INLINE_XATTR;
	if (is_inode_flag_set(inode, FI_INLINE_DATA))
		ri->i_inline |= F2FS_INLINE_DATA;
	if (is_inode_flag_set(inode, FI_INLINE_DENTRY))
		ri->i_inline |= F2FS_INLINE_DENTRY;
	if (is_inode_flag_set(inode, FI_DATA_EXIST))
		ri->i_inline |= F2FS_DATA_EXIST;
	if (is_inode_flag_set(inode, FI_INLINE_DOTS))
		ri->i_inline |= F2FS_INLINE_DOTS;
	if (is_inode_flag_set(inode, FI_EXTRA_ATTR))
		ri->i_inline |= F2FS_EXTRA_ATTR;
	if (is_inode_flag_set(inode, FI_PIN_FILE))
		ri->i_inline |= F2FS_PIN_FILE;
}

static inline int f2fs_has_extra_attr(struct inode *inode)
{
	return is_inode_flag_set(inode, FI_EXTRA_ATTR);
}

static inline int f2fs_has_inline_xattr(struct inode *inode)
{
	return is_inode_flag_set(inode, FI_INLINE_XATTR);
}

static inline int f2fs_compressed_file(struct inode *inode)
{
	return S_ISREG(inode->i_mode) &&
		is_inode_flag_set(inode, FI_COMPRESSED_FILE);
}

static inline bool f2fs_need_compress_data(struct inode *inode)
{
	int compress_mode = F2FS_OPTION(F2FS_I_SB(inode)).compress_mode;

	if (!f2fs_compressed_file(inode))
		return false;

	if (compress_mode == COMPR_MODE_FS)
		return true;
	else if (compress_mode == COMPR_MODE_USER &&
			is_inode_flag_set(inode, FI_ENABLE_COMPRESS))
		return true;

	return false;
}

static inline unsigned int addrs_per_inode(struct inode *inode)
{
	unsigned int addrs = CUR_ADDRS_PER_INODE(inode) -
				get_inline_xattr_addrs(inode);

	if (!f2fs_compressed_file(inode))
		return addrs;
	return ALIGN_DOWN(addrs, F2FS_I(inode)->i_cluster_size);
}

static inline unsigned int addrs_per_block(struct inode *inode)
{
	if (!f2fs_compressed_file(inode))
		return DEF_ADDRS_PER_BLOCK;
	return ALIGN_DOWN(DEF_ADDRS_PER_BLOCK, F2FS_I(inode)->i_cluster_size);
}

static inline void *inline_xattr_addr(struct inode *inode, struct page *page)
{
	struct f2fs_inode *ri = F2FS_INODE(page);

	return (void *)&(ri->i_addr[DEF_ADDRS_PER_INODE -
					get_inline_xattr_addrs(inode)]);
}

static inline int inline_xattr_size(struct inode *inode)
{
	if (f2fs_has_inline_xattr(inode))
		return get_inline_xattr_addrs(inode) * sizeof(__le32);
	return 0;
}

static inline int f2fs_has_inline_data(struct inode *inode)
{
	return is_inode_flag_set(inode, FI_INLINE_DATA);
}

static inline int f2fs_exist_data(struct inode *inode)
{
	return is_inode_flag_set(inode, FI_DATA_EXIST);
}

static inline int f2fs_has_inline_dots(struct inode *inode)
{
	return is_inode_flag_set(inode, FI_INLINE_DOTS);
}

static inline int f2fs_is_mmap_file(struct inode *inode)
{
	return is_inode_flag_set(inode, FI_MMAP_FILE);
}

static inline bool f2fs_is_pinned_file(struct inode *inode)
{
	return is_inode_flag_set(inode, FI_PIN_FILE);
}

static inline bool f2fs_is_atomic_file(struct inode *inode)
{
	return is_inode_flag_set(inode, FI_ATOMIC_FILE);
}

static inline bool f2fs_is_commit_atomic_write(struct inode *inode)
{
	return is_inode_flag_set(inode, FI_ATOMIC_COMMIT);
}

static inline bool f2fs_is_volatile_file(struct inode *inode)
{
	return is_inode_flag_set(inode, FI_VOLATILE_FILE);
}

static inline bool f2fs_is_first_block_written(struct inode *inode)
{
	return is_inode_flag_set(inode, FI_FIRST_BLOCK_WRITTEN);
}

static inline bool f2fs_is_drop_cache(struct inode *inode)
{
	return is_inode_flag_set(inode, FI_DROP_CACHE);
}

static inline void *inline_data_addr(struct inode *inode, struct page *page)
{
	struct f2fs_inode *ri = F2FS_INODE(page);
	int extra_size = get_extra_isize(inode);

	return (void *)&(ri->i_addr[extra_size + DEF_INLINE_RESERVED_SIZE]);
}

static inline int f2fs_has_inline_dentry(struct inode *inode)
{
	return is_inode_flag_set(inode, FI_INLINE_DENTRY);
}

static inline int is_file(struct inode *inode, int type)
{
	return F2FS_I(inode)->i_advise & type;
}

static inline void set_file(struct inode *inode, int type)
{
	F2FS_I(inode)->i_advise |= type;
	f2fs_mark_inode_dirty_sync(inode, true);
}

static inline void clear_file(struct inode *inode, int type)
{
	F2FS_I(inode)->i_advise &= ~type;
	f2fs_mark_inode_dirty_sync(inode, true);
}

static inline bool f2fs_is_time_consistent(struct inode *inode)
{
	if (!timespec64_equal(F2FS_I(inode)->i_disk_time, &inode->i_atime))
		return false;
	if (!timespec64_equal(F2FS_I(inode)->i_disk_time + 1, &inode->i_ctime))
		return false;
	if (!timespec64_equal(F2FS_I(inode)->i_disk_time + 2, &inode->i_mtime))
		return false;
	if (!timespec64_equal(F2FS_I(inode)->i_disk_time + 3,
						&F2FS_I(inode)->i_crtime))
		return false;
	return true;
}

static inline bool f2fs_skip_inode_update(struct inode *inode, int dsync)
{
	bool ret;

	if (dsync) {
		struct f2fs_sb_info *sbi = F2FS_I_SB(inode);

		spin_lock(&sbi->inode_lock[DIRTY_META]);
		ret = list_empty(&F2FS_I(inode)->gdirty_list);
		spin_unlock(&sbi->inode_lock[DIRTY_META]);
		return ret;
	}
	if (!is_inode_flag_set(inode, FI_AUTO_RECOVER) ||
			file_keep_isize(inode) ||
			i_size_read(inode) & ~PAGE_MASK)
		return false;

	if (!f2fs_is_time_consistent(inode))
		return false;

	spin_lock(&F2FS_I(inode)->i_size_lock);
	ret = F2FS_I(inode)->last_disk_size == i_size_read(inode);
	spin_unlock(&F2FS_I(inode)->i_size_lock);

	return ret;
}

static inline bool f2fs_readonly(struct super_block *sb)
{
	return sb_rdonly(sb);
}

static inline bool f2fs_cp_error(struct f2fs_sb_info *sbi)
{
	return is_set_ckpt_flags(sbi, CP_ERROR_FLAG);
}

static inline bool is_dot_dotdot(const u8 *name, size_t len)
{
	if (len == 1 && name[0] == '.')
		return true;

	if (len == 2 && name[0] == '.' && name[1] == '.')
		return true;

	return false;
}

static inline bool f2fs_may_extent_tree(struct inode *inode)
{
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);

	if (!test_opt(sbi, EXTENT_CACHE) ||
			is_inode_flag_set(inode, FI_NO_EXTENT) ||
			is_inode_flag_set(inode, FI_COMPRESSED_FILE))
		return false;

	/*
	 * for recovered files during mount do not create extents
	 * if shrinker is not registered.
	 */
	if (list_empty(&sbi->s_list))
		return false;

	return S_ISREG(inode->i_mode);
}

static inline void *f2fs_kmalloc(struct f2fs_sb_info *sbi,
					size_t size, gfp_t flags)
{
	if (time_to_inject(sbi, FAULT_KMALLOC)) {
		f2fs_show_injection_info(sbi, FAULT_KMALLOC);
		return NULL;
	}

	return kmalloc(size, flags);
}

static inline void *f2fs_kzalloc(struct f2fs_sb_info *sbi,
					size_t size, gfp_t flags)
{
	return f2fs_kmalloc(sbi, size, flags | __GFP_ZERO);
}

static inline void *f2fs_kvmalloc(struct f2fs_sb_info *sbi,
					size_t size, gfp_t flags)
{
	if (time_to_inject(sbi, FAULT_KVMALLOC)) {
		f2fs_show_injection_info(sbi, FAULT_KVMALLOC);
		return NULL;
	}

	return kvmalloc(size, flags);
}

static inline void *f2fs_kvzalloc(struct f2fs_sb_info *sbi,
					size_t size, gfp_t flags)
{
	return f2fs_kvmalloc(sbi, size, flags | __GFP_ZERO);
}

static inline int get_extra_isize(struct inode *inode)
{
	return F2FS_I(inode)->i_extra_isize / sizeof(__le32);
}

static inline int get_inline_xattr_addrs(struct inode *inode)
{
	return F2FS_I(inode)->i_inline_xattr_size;
}

#define f2fs_get_inode_mode(i) \
	((is_inode_flag_set(i, FI_ACL_MODE)) ? \
	 (F2FS_I(i)->i_acl_mode) : ((i)->i_mode))

#define F2FS_TOTAL_EXTRA_ATTR_SIZE			\
	(offsetof(struct f2fs_inode, i_extra_end) -	\
	offsetof(struct f2fs_inode, i_extra_isize))	\

#define F2FS_OLD_ATTRIBUTE_SIZE	(offsetof(struct f2fs_inode, i_addr))
#define F2FS_FITS_IN_INODE(f2fs_inode, extra_isize, field)		\
		((offsetof(typeof(*(f2fs_inode)), field) +	\
		sizeof((f2fs_inode)->field))			\
		<= (F2FS_OLD_ATTRIBUTE_SIZE + (extra_isize)))	\

#define DEFAULT_IOSTAT_PERIOD_MS	3000
#define MIN_IOSTAT_PERIOD_MS		100
/* maximum period of iostat tracing is 1 day */
#define MAX_IOSTAT_PERIOD_MS		8640000

static inline void f2fs_reset_iostat(struct f2fs_sb_info *sbi)
{
	int i;

	spin_lock(&sbi->iostat_lock);
	for (i = 0; i < NR_IO_TYPE; i++) {
		sbi->rw_iostat[i] = 0;
		sbi->prev_rw_iostat[i] = 0;
	}
	spin_unlock(&sbi->iostat_lock);
}

extern void f2fs_record_iostat(struct f2fs_sb_info *sbi);

static inline void f2fs_update_iostat(struct f2fs_sb_info *sbi,
			enum iostat_type type, unsigned long long io_bytes)
{
	if (!sbi->iostat_enable)
		return;
	spin_lock(&sbi->iostat_lock);
	sbi->rw_iostat[type] += io_bytes;

	if (type == APP_WRITE_IO || type == APP_DIRECT_IO)
		sbi->rw_iostat[APP_BUFFERED_IO] =
			sbi->rw_iostat[APP_WRITE_IO] -
			sbi->rw_iostat[APP_DIRECT_IO];

	if (type == APP_READ_IO || type == APP_DIRECT_READ_IO)
		sbi->rw_iostat[APP_BUFFERED_READ_IO] =
			sbi->rw_iostat[APP_READ_IO] -
			sbi->rw_iostat[APP_DIRECT_READ_IO];
	spin_unlock(&sbi->iostat_lock);

	f2fs_record_iostat(sbi);
}

#define __is_large_section(sbi)		((sbi)->segs_per_sec > 1)

#define __is_meta_io(fio) (PAGE_TYPE_OF_BIO((fio)->type) == META)

bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
					block_t blkaddr, int type);
static inline void verify_blkaddr(struct f2fs_sb_info *sbi,
					block_t blkaddr, int type)
{
	if (!f2fs_is_valid_blkaddr(sbi, blkaddr, type)) {
		f2fs_err(sbi, "invalid blkaddr: %u, type: %d, run fsck to fix.",
			 blkaddr, type);
		f2fs_bug_on(sbi, 1);
	}
}

static inline bool __is_valid_data_blkaddr(block_t blkaddr)
{
	if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR ||
			blkaddr == COMPRESS_ADDR)
		return false;
	return true;
}

static inline void f2fs_set_page_private(struct page *page,
						unsigned long data)
{
	if (PagePrivate(page))
		return;

	attach_page_private(page, (void *)data);
}

static inline void f2fs_clear_page_private(struct page *page)
{
	detach_page_private(page);
}

/*
 * file.c
 */
int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
void f2fs_truncate_data_blocks(struct dnode_of_data *dn);
int f2fs_do_truncate_blocks(struct inode *inode, u64 from, bool lock);
int f2fs_truncate_blocks(struct inode *inode, u64 from, bool lock);
int f2fs_truncate(struct inode *inode);
int f2fs_getattr(struct user_namespace *mnt_userns, const struct path *path,
		 struct kstat *stat, u32 request_mask, unsigned int flags);
int f2fs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
		 struct iattr *attr);
int f2fs_truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end);
void f2fs_truncate_data_blocks_range(struct dnode_of_data *dn, int count);
int f2fs_precache_extents(struct inode *inode);
long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
int f2fs_transfer_project_quota(struct inode *inode, kprojid_t kprojid);
int f2fs_pin_file_control(struct inode *inode, bool inc);

/*
 * inode.c
 */
void f2fs_set_inode_flags(struct inode *inode);
bool f2fs_inode_chksum_verify(struct f2fs_sb_info *sbi, struct page *page);
void f2fs_inode_chksum_set(struct f2fs_sb_info *sbi, struct page *page);
struct inode *f2fs_iget(struct super_block *sb, unsigned long ino);
struct inode *f2fs_iget_retry(struct super_block *sb, unsigned long ino);
int f2fs_try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink);
void f2fs_update_inode(struct inode *inode, struct page *node_page);
void f2fs_update_inode_page(struct inode *inode);
int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc);
void f2fs_evict_inode(struct inode *inode);
void f2fs_handle_failed_inode(struct inode *inode);

/*
 * namei.c
 */
int f2fs_update_extension_list(struct f2fs_sb_info *sbi, const char *name,
							bool hot, bool set);
struct dentry *f2fs_get_parent(struct dentry *child);

/*
 * dir.c
 */
unsigned char f2fs_get_de_type(struct f2fs_dir_entry *de);
int f2fs_init_casefolded_name(const struct inode *dir,
			      struct f2fs_filename *fname);
int f2fs_setup_filename(struct inode *dir, const struct qstr *iname,
			int lookup, struct f2fs_filename *fname);
int f2fs_prepare_lookup(struct inode *dir, struct dentry *dentry,
			struct f2fs_filename *fname);
void f2fs_free_filename(struct f2fs_filename *fname);
struct f2fs_dir_entry *f2fs_find_target_dentry(const struct f2fs_dentry_ptr *d,
			const struct f2fs_filename *fname, int *max_slots);
int f2fs_fill_dentries(struct dir_context *ctx, struct f2fs_dentry_ptr *d,
			unsigned int start_pos, struct fscrypt_str *fstr);
void f2fs_do_make_empty_dir(struct inode *inode, struct inode *parent,
			struct f2fs_dentry_ptr *d);
struct page *f2fs_init_inode_metadata(struct inode *inode, struct inode *dir,
			const struct f2fs_filename *fname, struct page *dpage);
void f2fs_update_parent_metadata(struct inode *dir, struct inode *inode,
			unsigned int current_depth);
int f2fs_room_for_filename(const void *bitmap, int slots, int max_slots);
void f2fs_drop_nlink(struct inode *dir, struct inode *inode);
struct f2fs_dir_entry *__f2fs_find_entry(struct inode *dir,
					 const struct f2fs_filename *fname,
					 struct page **res_page);
struct f2fs_dir_entry *f2fs_find_entry(struct inode *dir,
			const struct qstr *child, struct page **res_page);
struct f2fs_dir_entry *f2fs_parent_dir(struct inode *dir, struct page **p);
ino_t f2fs_inode_by_name(struct inode *dir, const struct qstr *qstr,
			struct page **page);
void f2fs_set_link(struct inode *dir, struct f2fs_dir_entry *de,
			struct page *page, struct inode *inode);
bool f2fs_has_enough_room(struct inode *dir, struct page *ipage,
			  const struct f2fs_filename *fname);
void f2fs_update_dentry(nid_t ino, umode_t mode, struct f2fs_dentry_ptr *d,
			const struct fscrypt_str *name, f2fs_hash_t name_hash,
			unsigned int bit_pos);
int f2fs_add_regular_entry(struct inode *dir, const struct f2fs_filename *fname,
			struct inode *inode, nid_t ino, umode_t mode);
int f2fs_add_dentry(struct inode *dir, const struct f2fs_filename *fname,
			struct inode *inode, nid_t ino, umode_t mode);
int f2fs_do_add_link(struct inode *dir, const struct qstr *name,
			struct inode *inode, nid_t ino, umode_t mode);
void f2fs_delete_entry(struct f2fs_dir_entry *dentry, struct page *page,
			struct inode *dir, struct inode *inode);
int f2fs_do_tmpfile(struct inode *inode, struct inode *dir);
bool f2fs_empty_dir(struct inode *dir);

static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode)
{
	if (fscrypt_is_nokey_name(dentry))
		return -ENOKEY;
	return f2fs_do_add_link(d_inode(dentry->d_parent), &dentry->d_name,
				inode, inode->i_ino, inode->i_mode);
}

/*
 * super.c
 */
int f2fs_inode_dirtied(struct inode *inode, bool sync);
void f2fs_inode_synced(struct inode *inode);
int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly);
int f2fs_quota_sync(struct super_block *sb, int type);
loff_t max_file_blocks(struct inode *inode);
void f2fs_quota_off_umount(struct super_block *sb);
int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover);
int f2fs_sync_fs(struct super_block *sb, int sync);
int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi);

/*
 * hash.c
 */
void f2fs_hash_filename(const struct inode *dir, struct f2fs_filename *fname);

/*
 * node.c
 */
struct dnode_of_data;
struct node_info;

int f2fs_check_nid_range(struct f2fs_sb_info *sbi, nid_t nid);
bool f2fs_available_free_memory(struct f2fs_sb_info *sbi, int type);
bool f2fs_in_warm_node_list(struct f2fs_sb_info *sbi, struct page *page);
void f2fs_init_fsync_node_info(struct f2fs_sb_info *sbi);
void f2fs_del_fsync_node_entry(struct f2fs_sb_info *sbi, struct page *page);
void f2fs_reset_fsync_node_info(struct f2fs_sb_info *sbi);
int f2fs_need_dentry_mark(struct f2fs_sb_info *sbi, nid_t nid);
bool f2fs_is_checkpointed_node(struct f2fs_sb_info *sbi, nid_t nid);
bool f2fs_need_inode_block_update(struct f2fs_sb_info *sbi, nid_t ino);
int f2fs_get_node_info(struct f2fs_sb_info *sbi, nid_t nid,
						struct node_info *ni);
pgoff_t f2fs_get_next_page_offset(struct dnode_of_data *dn, pgoff_t pgofs);
int f2fs_get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode);
int f2fs_truncate_inode_blocks(struct inode *inode, pgoff_t from);
int f2fs_truncate_xattr_node(struct inode *inode);
int f2fs_wait_on_node_pages_writeback(struct f2fs_sb_info *sbi,
					unsigned int seq_id);
int f2fs_remove_inode_page(struct inode *inode);
struct page *f2fs_new_inode_page(struct inode *inode);
struct page *f2fs_new_node_page(struct dnode_of_data *dn, unsigned int ofs);
void f2fs_ra_node_page(struct f2fs_sb_info *sbi, nid_t nid);
struct page *f2fs_get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid);
struct page *f2fs_get_node_page_ra(struct page *parent, int start);
int f2fs_move_node_page(struct page *node_page, int gc_type);
void f2fs_flush_inline_data(struct f2fs_sb_info *sbi);
int f2fs_fsync_node_pages(struct f2fs_sb_info *sbi, struct inode *inode,
			struct writeback_control *wbc, bool atomic,
			unsigned int *seq_id);
int f2fs_sync_node_pages(struct f2fs_sb_info *sbi,
			struct writeback_control *wbc,
			bool do_balance, enum iostat_type io_type);
int f2fs_build_free_nids(struct f2fs_sb_info *sbi, bool sync, bool mount);
bool f2fs_alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid);
void f2fs_alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid);
void f2fs_alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid);
int f2fs_try_to_free_nids(struct f2fs_sb_info *sbi, int nr_shrink);
int f2fs_recover_inline_xattr(struct inode *inode, struct page *page);
int f2fs_recover_xattr_data(struct inode *inode, struct page *page);
int f2fs_recover_inode_page(struct f2fs_sb_info *sbi, struct page *page);
int f2fs_restore_node_summary(struct f2fs_sb_info *sbi,
			unsigned int segno, struct f2fs_summary_block *sum);
int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc);
int f2fs_build_node_manager(struct f2fs_sb_info *sbi);
void f2fs_destroy_node_manager(struct f2fs_sb_info *sbi);
int __init f2fs_create_node_manager_caches(void);
void f2fs_destroy_node_manager_caches(void);

/*
 * segment.c
 */
bool f2fs_need_SSR(struct f2fs_sb_info *sbi);
void f2fs_register_inmem_page(struct inode *inode, struct page *page);
void f2fs_drop_inmem_pages_all(struct f2fs_sb_info *sbi, bool gc_failure);
void f2fs_drop_inmem_pages(struct inode *inode);
void f2fs_drop_inmem_page(struct inode *inode, struct page *page);
int f2fs_commit_inmem_pages(struct inode *inode);
void f2fs_balance_fs(struct f2fs_sb_info *sbi, bool need);
void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi, bool from_bg);
int f2fs_issue_flush(struct f2fs_sb_info *sbi, nid_t ino);
int f2fs_create_flush_cmd_control(struct f2fs_sb_info *sbi);
int f2fs_flush_device_cache(struct f2fs_sb_info *sbi);
void f2fs_destroy_flush_cmd_control(struct f2fs_sb_info *sbi, bool free);
void f2fs_invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr);
bool f2fs_is_checkpointed_data(struct f2fs_sb_info *sbi, block_t blkaddr);
void f2fs_drop_discard_cmd(struct f2fs_sb_info *sbi);
void f2fs_stop_discard_thread(struct f2fs_sb_info *sbi);
bool f2fs_issue_discard_timeout(struct f2fs_sb_info *sbi);
void f2fs_clear_prefree_segments(struct f2fs_sb_info *sbi,
					struct cp_control *cpc);
void f2fs_dirty_to_prefree(struct f2fs_sb_info *sbi);
block_t f2fs_get_unusable_blocks(struct f2fs_sb_info *sbi);
int f2fs_disable_cp_again(struct f2fs_sb_info *sbi, block_t unusable);
void f2fs_release_discard_addrs(struct f2fs_sb_info *sbi);
int f2fs_npages_for_summary_flush(struct f2fs_sb_info *sbi, bool for_ra);
void f2fs_init_inmem_curseg(struct f2fs_sb_info *sbi);
void f2fs_save_inmem_curseg(struct f2fs_sb_info *sbi);
void f2fs_restore_inmem_curseg(struct f2fs_sb_info *sbi);
void f2fs_get_new_segment(struct f2fs_sb_info *sbi,
			unsigned int *newseg, bool new_sec, int dir);
void f2fs_allocate_segment_for_resize(struct f2fs_sb_info *sbi, int type,
					unsigned int start, unsigned int end);
void f2fs_allocate_new_segment(struct f2fs_sb_info *sbi, int type);
void f2fs_allocate_new_segments(struct f2fs_sb_info *sbi);
int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range);
bool f2fs_exist_trim_candidates(struct f2fs_sb_info *sbi,
					struct cp_control *cpc);
struct page *f2fs_get_sum_page(struct f2fs_sb_info *sbi, unsigned int segno);
void f2fs_update_meta_page(struct f2fs_sb_info *sbi, void *src,
					block_t blk_addr);
void f2fs_do_write_meta_page(struct f2fs_sb_info *sbi, struct page *page,
						enum iostat_type io_type);
void f2fs_do_write_node_page(unsigned int nid, struct f2fs_io_info *fio);
void f2fs_outplace_write_data(struct dnode_of_data *dn,
			struct f2fs_io_info *fio);
int f2fs_inplace_write_data(struct f2fs_io_info *fio);
void f2fs_do_replace_block(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
			block_t old_blkaddr, block_t new_blkaddr,
			bool recover_curseg, bool recover_newaddr,
			bool from_gc);
void f2fs_replace_block(struct f2fs_sb_info *sbi, struct dnode_of_data *dn,
			block_t old_addr, block_t new_addr,
			unsigned char version, bool recover_curseg,
			bool recover_newaddr);
void f2fs_allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
			block_t old_blkaddr, block_t *new_blkaddr,
			struct f2fs_summary *sum, int type,
			struct f2fs_io_info *fio);
void f2fs_wait_on_page_writeback(struct page *page,
			enum page_type type, bool ordered, bool locked);
void f2fs_wait_on_block_writeback(struct inode *inode, block_t blkaddr);
void f2fs_wait_on_block_writeback_range(struct inode *inode, block_t blkaddr,
								block_t len);
void f2fs_write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk);
void f2fs_write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk);
int f2fs_lookup_journal_in_cursum(struct f2fs_journal *journal, int type,
			unsigned int val, int alloc);
void f2fs_flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc);
int f2fs_fix_curseg_write_pointer(struct f2fs_sb_info *sbi);
int f2fs_check_write_pointer(struct f2fs_sb_info *sbi);
int f2fs_build_segment_manager(struct f2fs_sb_info *sbi);
void f2fs_destroy_segment_manager(struct f2fs_sb_info *sbi);
int __init f2fs_create_segment_manager_caches(void);
void f2fs_destroy_segment_manager_caches(void);
int f2fs_rw_hint_to_seg_type(enum rw_hint hint);
enum rw_hint f2fs_io_type_to_rw_hint(struct f2fs_sb_info *sbi,
			enum page_type type, enum temp_type temp);
unsigned int f2fs_usable_segs_in_sec(struct f2fs_sb_info *sbi,
			unsigned int segno);
unsigned int f2fs_usable_blks_in_seg(struct f2fs_sb_info *sbi,
			unsigned int segno);

/*
 * checkpoint.c
 */
void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi, bool end_io);
struct page *f2fs_grab_meta_page(struct f2fs_sb_info *sbi, pgoff_t index);
struct page *f2fs_get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index);
struct page *f2fs_get_meta_page_retry(struct f2fs_sb_info *sbi, pgoff_t index);
struct page *f2fs_get_tmp_page(struct f2fs_sb_info *sbi, pgoff_t index);
bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
					block_t blkaddr, int type);
int f2fs_ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
			int type, bool sync);
void f2fs_ra_meta_pages_cond(struct f2fs_sb_info *sbi, pgoff_t index);
long f2fs_sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
			long nr_to_write, enum iostat_type io_type);
void f2fs_add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type);
void f2fs_remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type);
void f2fs_release_ino_entry(struct f2fs_sb_info *sbi, bool all);
bool f2fs_exist_written_data(struct f2fs_sb_info *sbi, nid_t ino, int mode);
void f2fs_set_dirty_device(struct f2fs_sb_info *sbi, nid_t ino,
					unsigned int devidx, int type);
bool f2fs_is_dirty_device(struct f2fs_sb_info *sbi, nid_t ino,
					unsigned int devidx, int type);
int f2fs_sync_inode_meta(struct f2fs_sb_info *sbi);
int f2fs_acquire_orphan_inode(struct f2fs_sb_info *sbi);
void f2fs_release_orphan_inode(struct f2fs_sb_info *sbi);
void f2fs_add_orphan_inode(struct inode *inode);
void f2fs_remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino);
int f2fs_recover_orphan_inodes(struct f2fs_sb_info *sbi);
int f2fs_get_valid_checkpoint(struct f2fs_sb_info *sbi);
void f2fs_update_dirty_page(struct inode *inode, struct page *page);
void f2fs_remove_dirty_inode(struct inode *inode);
int f2fs_sync_dirty_inodes(struct f2fs_sb_info *sbi, enum inode_type type);
void f2fs_wait_on_all_pages(struct f2fs_sb_info *sbi, int type);
u64 f2fs_get_sectors_written(struct f2fs_sb_info *sbi);
int f2fs_write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc);
void f2fs_init_ino_entry_info(struct f2fs_sb_info *sbi);
int __init f2fs_create_checkpoint_caches(void);
void f2fs_destroy_checkpoint_caches(void);
int f2fs_issue_checkpoint(struct f2fs_sb_info *sbi);
int f2fs_start_ckpt_thread(struct f2fs_sb_info *sbi);
void f2fs_stop_ckpt_thread(struct f2fs_sb_info *sbi);
void f2fs_init_ckpt_req_control(struct f2fs_sb_info *sbi);

/*
 * data.c
 */
int __init f2fs_init_bioset(void);
void f2fs_destroy_bioset(void);
int f2fs_init_bio_entry_cache(void);
void f2fs_destroy_bio_entry_cache(void);
void f2fs_submit_bio(struct f2fs_sb_info *sbi,
				struct bio *bio, enum page_type type);
void f2fs_submit_merged_write(struct f2fs_sb_info *sbi, enum page_type type);
void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi,
				struct inode *inode, struct page *page,
				nid_t ino, enum page_type type);
void f2fs_submit_merged_ipu_write(struct f2fs_sb_info *sbi,
					struct bio **bio, struct page *page);
void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi);
int f2fs_submit_page_bio(struct f2fs_io_info *fio);
int f2fs_merge_page_bio(struct f2fs_io_info *fio);
void f2fs_submit_page_write(struct f2fs_io_info *fio);
struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi,
			block_t blk_addr, struct bio *bio);
int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr);
void f2fs_set_data_blkaddr(struct dnode_of_data *dn);
void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr);
int f2fs_reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count);
int f2fs_reserve_new_block(struct dnode_of_data *dn);
int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index);
int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from);
int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index);
struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index,
			int op_flags, bool for_write);
struct page *f2fs_find_data_page(struct inode *inode, pgoff_t index);
struct page *f2fs_get_lock_data_page(struct inode *inode, pgoff_t index,
			bool for_write);
struct page *f2fs_get_new_data_page(struct inode *inode,
			struct page *ipage, pgoff_t index, bool new_i_size);
int f2fs_do_write_data_page(struct f2fs_io_info *fio);
void f2fs_do_map_lock(struct f2fs_sb_info *sbi, int flag, bool lock);
int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
			int create, int flag);
int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
			u64 start, u64 len);
int f2fs_encrypt_one_page(struct f2fs_io_info *fio);
bool f2fs_should_update_inplace(struct inode *inode, struct f2fs_io_info *fio);
bool f2fs_should_update_outplace(struct inode *inode, struct f2fs_io_info *fio);
int f2fs_write_single_data_page(struct page *page, int *submitted,
				struct bio **bio, sector_t *last_block,
				struct writeback_control *wbc,
				enum iostat_type io_type,
				int compr_blocks, bool allow_balance);
void f2fs_invalidate_page(struct page *page, unsigned int offset,
			unsigned int length);
int f2fs_release_page(struct page *page, gfp_t wait);
#ifdef CONFIG_MIGRATION
int f2fs_migrate_page(struct address_space *mapping, struct page *newpage,
			struct page *page, enum migrate_mode mode);
#endif
bool f2fs_overwrite_io(struct inode *inode, loff_t pos, size_t len);
void f2fs_clear_page_cache_dirty_tag(struct page *page);
int f2fs_init_post_read_processing(void);
void f2fs_destroy_post_read_processing(void);
int f2fs_init_post_read_wq(struct f2fs_sb_info *sbi);
void f2fs_destroy_post_read_wq(struct f2fs_sb_info *sbi);

/*
 * gc.c
 */
int f2fs_start_gc_thread(struct f2fs_sb_info *sbi);
void f2fs_stop_gc_thread(struct f2fs_sb_info *sbi);
block_t f2fs_start_bidx_of_node(unsigned int node_ofs, struct inode *inode);
int f2fs_gc(struct f2fs_sb_info *sbi, bool sync, bool background,
			unsigned int segno);
void f2fs_build_gc_manager(struct f2fs_sb_info *sbi);
int f2fs_resize_fs(struct f2fs_sb_info *sbi, __u64 block_count);
int __init f2fs_create_garbage_collection_cache(void);
void f2fs_destroy_garbage_collection_cache(void);

/*
 * recovery.c
 */
int f2fs_recover_fsync_data(struct f2fs_sb_info *sbi, bool check_only);
bool f2fs_space_for_roll_forward(struct f2fs_sb_info *sbi);

/*
 * debug.c
 */
#ifdef CONFIG_F2FS_STAT_FS
struct f2fs_stat_info {
	struct list_head stat_list;
	struct f2fs_sb_info *sbi;
	int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;
	int main_area_segs, main_area_sections, main_area_zones;
	unsigned long long hit_largest, hit_cached, hit_rbtree;
	unsigned long long hit_total, total_ext;
	int ext_tree, zombie_tree, ext_node;
	int ndirty_node, ndirty_dent, ndirty_meta, ndirty_imeta;
	int ndirty_data, ndirty_qdata;
	int inmem_pages;
	unsigned int ndirty_dirs, ndirty_files, nquota_files, ndirty_all;
	int nats, dirty_nats, sits, dirty_sits;
	int free_nids, avail_nids, alloc_nids;
	int total_count, utilization;
	int bg_gc, nr_wb_cp_data, nr_wb_data;
	int nr_rd_data, nr_rd_node, nr_rd_meta;
	int nr_dio_read, nr_dio_write;
	unsigned int io_skip_bggc, other_skip_bggc;
	int nr_flushing, nr_flushed, flush_list_empty;
	int nr_discarding, nr_discarded;
	int nr_discard_cmd;
	unsigned int undiscard_blks;
	int nr_issued_ckpt, nr_total_ckpt, nr_queued_ckpt;
	unsigned int cur_ckpt_time, peak_ckpt_time;
	int inline_xattr, inline_inode, inline_dir, append, update, orphans;
	int compr_inode;
	unsigned long long compr_blocks;
	int aw_cnt, max_aw_cnt, vw_cnt, max_vw_cnt;
	unsigned int valid_count, valid_node_count, valid_inode_count, discard_blks;
	unsigned int bimodal, avg_vblocks;
	int util_free, util_valid, util_invalid;
	int rsvd_segs, overp_segs;
	int dirty_count, node_pages, meta_pages;
	int prefree_count, call_count, cp_count, bg_cp_count;
	int tot_segs, node_segs, data_segs, free_segs, free_secs;
	int bg_node_segs, bg_data_segs;
	int tot_blks, data_blks, node_blks;
	int bg_data_blks, bg_node_blks;
	unsigned long long skipped_atomic_files[2];
	int curseg[NR_CURSEG_TYPE];
	int cursec[NR_CURSEG_TYPE];
	int curzone[NR_CURSEG_TYPE];
	unsigned int dirty_seg[NR_CURSEG_TYPE];
	unsigned int full_seg[NR_CURSEG_TYPE];
	unsigned int valid_blks[NR_CURSEG_TYPE];

	unsigned int meta_count[META_MAX];
	unsigned int segment_count[2];
	unsigned int block_count[2];
	unsigned int inplace_count;
	unsigned long long base_mem, cache_mem, page_mem;
};

static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi)
{
	return (struct f2fs_stat_info *)sbi->stat_info;
}

#define stat_inc_cp_count(si)		((si)->cp_count++)
#define stat_inc_bg_cp_count(si)	((si)->bg_cp_count++)
#define stat_inc_call_count(si)		((si)->call_count++)
#define stat_inc_bggc_count(si)		((si)->bg_gc++)
#define stat_io_skip_bggc_count(sbi)	((sbi)->io_skip_bggc++)
#define stat_other_skip_bggc_count(sbi)	((sbi)->other_skip_bggc++)
#define stat_inc_dirty_inode(sbi, type)	((sbi)->ndirty_inode[type]++)
#define stat_dec_dirty_inode(sbi, type)	((sbi)->ndirty_inode[type]--)
#define stat_inc_total_hit(sbi)		(atomic64_inc(&(sbi)->total_hit_ext))
#define stat_inc_rbtree_node_hit(sbi)	(atomic64_inc(&(sbi)->read_hit_rbtree))
#define stat_inc_largest_node_hit(sbi)	(atomic64_inc(&(sbi)->read_hit_largest))
#define stat_inc_cached_node_hit(sbi)	(atomic64_inc(&(sbi)->read_hit_cached))
#define stat_inc_inline_xattr(inode)					\
	do {								\
		if (f2fs_has_inline_xattr(inode))			\
			(atomic_inc(&F2FS_I_SB(inode)->inline_xattr));	\
	} while (0)
#define stat_dec_inline_xattr(inode)					\
	do {								\
		if (f2fs_has_inline_xattr(inode))			\
			(atomic_dec(&F2FS_I_SB(inode)->inline_xattr));	\
	} while (0)
#define stat_inc_inline_inode(inode)					\
	do {								\
		if (f2fs_has_inline_data(inode))			\
			(atomic_inc(&F2FS_I_SB(inode)->inline_inode));	\
	} while (0)
#define stat_dec_inline_inode(inode)					\
	do {								\
		if (f2fs_has_inline_data(inode))			\
			(atomic_dec(&F2FS_I_SB(inode)->inline_inode));	\
	} while (0)
#define stat_inc_inline_dir(inode)					\
	do {								\
		if (f2fs_has_inline_dentry(inode))			\
			(atomic_inc(&F2FS_I_SB(inode)->inline_dir));	\
	} while (0)
#define stat_dec_inline_dir(inode)					\
	do {								\
		if (f2fs_has_inline_dentry(inode))			\
			(atomic_dec(&F2FS_I_SB(inode)->inline_dir));	\
	} while (0)
#define stat_inc_compr_inode(inode)					\
	do {								\
		if (f2fs_compressed_file(inode))			\
			(atomic_inc(&F2FS_I_SB(inode)->compr_inode));	\
	} while (0)
#define stat_dec_compr_inode(inode)					\
	do {								\
		if (f2fs_compressed_file(inode))			\
			(atomic_dec(&F2FS_I_SB(inode)->compr_inode));	\
	} while (0)
#define stat_add_compr_blocks(inode, blocks)				\
		(atomic64_add(blocks, &F2FS_I_SB(inode)->compr_blocks))
#define stat_sub_compr_blocks(inode, blocks)				\
		(atomic64_sub(blocks, &F2FS_I_SB(inode)->compr_blocks))
#define stat_inc_meta_count(sbi, blkaddr)				\
	do {								\
		if (blkaddr < SIT_I(sbi)->sit_base_addr)		\
			atomic_inc(&(sbi)->meta_count[META_CP]);	\
		else if (blkaddr < NM_I(sbi)->nat_blkaddr)		\
			atomic_inc(&(sbi)->meta_count[META_SIT]);	\
		else if (blkaddr < SM_I(sbi)->ssa_blkaddr)		\
			atomic_inc(&(sbi)->meta_count[META_NAT]);	\
		else if (blkaddr < SM_I(sbi)->main_blkaddr)		\
			atomic_inc(&(sbi)->meta_count[META_SSA]);	\
	} while (0)
#define stat_inc_seg_type(sbi, curseg)					\
		((sbi)->segment_count[(curseg)->alloc_type]++)
#define stat_inc_block_count(sbi, curseg)				\
		((sbi)->block_count[(curseg)->alloc_type]++)
#define stat_inc_inplace_blocks(sbi)					\
		(atomic_inc(&(sbi)->inplace_count))
#define stat_update_max_atomic_write(inode)				\
	do {								\
		int cur = F2FS_I_SB(inode)->atomic_files;	\
		int max = atomic_read(&F2FS_I_SB(inode)->max_aw_cnt);	\
		if (cur > max)						\
			atomic_set(&F2FS_I_SB(inode)->max_aw_cnt, cur);	\
	} while (0)
#define stat_inc_volatile_write(inode)					\
		(atomic_inc(&F2FS_I_SB(inode)->vw_cnt))
#define stat_dec_volatile_write(inode)					\
		(atomic_dec(&F2FS_I_SB(inode)->vw_cnt))
#define stat_update_max_volatile_write(inode)				\
	do {								\
		int cur = atomic_read(&F2FS_I_SB(inode)->vw_cnt);	\
		int max = atomic_read(&F2FS_I_SB(inode)->max_vw_cnt);	\
		if (cur > max)						\
			atomic_set(&F2FS_I_SB(inode)->max_vw_cnt, cur);	\
	} while (0)
#define stat_inc_seg_count(sbi, type, gc_type)				\
	do {								\
		struct f2fs_stat_info *si = F2FS_STAT(sbi);		\
		si->tot_segs++;						\
		if ((type) == SUM_TYPE_DATA) {				\
			si->data_segs++;				\
			si->bg_data_segs += (gc_type == BG_GC) ? 1 : 0;	\
		} else {						\
			si->node_segs++;				\
			si->bg_node_segs += (gc_type == BG_GC) ? 1 : 0;	\
		}							\
	} while (0)

#define stat_inc_tot_blk_count(si, blks)				\
	((si)->tot_blks += (blks))

#define stat_inc_data_blk_count(sbi, blks, gc_type)			\
	do {								\
		struct f2fs_stat_info *si = F2FS_STAT(sbi);		\
		stat_inc_tot_blk_count(si, blks);			\
		si->data_blks += (blks);				\
		si->bg_data_blks += ((gc_type) == BG_GC) ? (blks) : 0;	\
	} while (0)

#define stat_inc_node_blk_count(sbi, blks, gc_type)			\
	do {								\
		struct f2fs_stat_info *si = F2FS_STAT(sbi);		\
		stat_inc_tot_blk_count(si, blks);			\
		si->node_blks += (blks);				\
		si->bg_node_blks += ((gc_type) == BG_GC) ? (blks) : 0;	\
	} while (0)

int f2fs_build_stats(struct f2fs_sb_info *sbi);
void f2fs_destroy_stats(struct f2fs_sb_info *sbi);
void __init f2fs_create_root_stats(void);
void f2fs_destroy_root_stats(void);
void f2fs_update_sit_info(struct f2fs_sb_info *sbi);
#else
#define stat_inc_cp_count(si)				do { } while (0)
#define stat_inc_bg_cp_count(si)			do { } while (0)
#define stat_inc_call_count(si)				do { } while (0)
#define stat_inc_bggc_count(si)				do { } while (0)
#define stat_io_skip_bggc_count(sbi)			do { } while (0)
#define stat_other_skip_bggc_count(sbi)			do { } while (0)
#define stat_inc_dirty_inode(sbi, type)			do { } while (0)
#define stat_dec_dirty_inode(sbi, type)			do { } while (0)
#define stat_inc_total_hit(sbi)				do { } while (0)
#define stat_inc_rbtree_node_hit(sbi)			do { } while (0)
#define stat_inc_largest_node_hit(sbi)			do { } while (0)
#define stat_inc_cached_node_hit(sbi)			do { } while (0)
#define stat_inc_inline_xattr(inode)			do { } while (0)
#define stat_dec_inline_xattr(inode)			do { } while (0)
#define stat_inc_inline_inode(inode)			do { } while (0)
#define stat_dec_inline_inode(inode)			do { } while (0)
#define stat_inc_inline_dir(inode)			do { } while (0)
#define stat_dec_inline_dir(inode)			do { } while (0)
#define stat_inc_compr_inode(inode)			do { } while (0)
#define stat_dec_compr_inode(inode)			do { } while (0)
#define stat_add_compr_blocks(inode, blocks)		do { } while (0)
#define stat_sub_compr_blocks(inode, blocks)		do { } while (0)
#define stat_update_max_atomic_write(inode)		do { } while (0)
#define stat_inc_volatile_write(inode)			do { } while (0)
#define stat_dec_volatile_write(inode)			do { } while (0)
#define stat_update_max_volatile_write(inode)		do { } while (0)
#define stat_inc_meta_count(sbi, blkaddr)		do { } while (0)
#define stat_inc_seg_type(sbi, curseg)			do { } while (0)
#define stat_inc_block_count(sbi, curseg)		do { } while (0)
#define stat_inc_inplace_blocks(sbi)			do { } while (0)
#define stat_inc_seg_count(sbi, type, gc_type)		do { } while (0)
#define stat_inc_tot_blk_count(si, blks)		do { } while (0)
#define stat_inc_data_blk_count(sbi, blks, gc_type)	do { } while (0)
#define stat_inc_node_blk_count(sbi, blks, gc_type)	do { } while (0)

static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
static inline void __init f2fs_create_root_stats(void) { }
static inline void f2fs_destroy_root_stats(void) { }
static inline void f2fs_update_sit_info(struct f2fs_sb_info *sbi) {}
#endif

extern const struct file_operations f2fs_dir_operations;
extern const struct file_operations f2fs_file_operations;
extern const struct inode_operations f2fs_file_inode_operations;
extern const struct address_space_operations f2fs_dblock_aops;
extern const struct address_space_operations f2fs_node_aops;
extern const struct address_space_operations f2fs_meta_aops;
extern const struct inode_operations f2fs_dir_inode_operations;
extern const struct inode_operations f2fs_symlink_inode_operations;
extern const struct inode_operations f2fs_encrypted_symlink_inode_operations;
extern const struct inode_operations f2fs_special_inode_operations;
extern struct kmem_cache *f2fs_inode_entry_slab;

/*
 * inline.c
 */
bool f2fs_may_inline_data(struct inode *inode);
bool f2fs_may_inline_dentry(struct inode *inode);
void f2fs_do_read_inline_data(struct page *page, struct page *ipage);
void f2fs_truncate_inline_inode(struct inode *inode,
						struct page *ipage, u64 from);
int f2fs_read_inline_data(struct inode *inode, struct page *page);
int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page);
int f2fs_convert_inline_inode(struct inode *inode);
int f2fs_try_convert_inline_dir(struct inode *dir, struct dentry *dentry);
int f2fs_write_inline_data(struct inode *inode, struct page *page);
int f2fs_recover_inline_data(struct inode *inode, struct page *npage);
struct f2fs_dir_entry *f2fs_find_in_inline_dir(struct inode *dir,
					const struct f2fs_filename *fname,
					struct page **res_page);
int f2fs_make_empty_inline_dir(struct inode *inode, struct inode *parent,
			struct page *ipage);
int f2fs_add_inline_entry(struct inode *dir, const struct f2fs_filename *fname,
			struct inode *inode, nid_t ino, umode_t mode);
void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry,
				struct page *page, struct inode *dir,
				struct inode *inode);
bool f2fs_empty_inline_dir(struct inode *dir);
int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx,
			struct fscrypt_str *fstr);
int f2fs_inline_data_fiemap(struct inode *inode,
			struct fiemap_extent_info *fieinfo,
			__u64 start, __u64 len);

/*
 * shrinker.c
 */
unsigned long f2fs_shrink_count(struct shrinker *shrink,
			struct shrink_control *sc);
unsigned long f2fs_shrink_scan(struct shrinker *shrink,
			struct shrink_control *sc);
void f2fs_join_shrinker(struct f2fs_sb_info *sbi);
void f2fs_leave_shrinker(struct f2fs_sb_info *sbi);

/*
 * extent_cache.c
 */
struct rb_entry *f2fs_lookup_rb_tree(struct rb_root_cached *root,
				struct rb_entry *cached_re, unsigned int ofs);
struct rb_node **f2fs_lookup_rb_tree_ext(struct f2fs_sb_info *sbi,
				struct rb_root_cached *root,
				struct rb_node **parent,
				unsigned long long key, bool *left_most);
struct rb_node **f2fs_lookup_rb_tree_for_insert(struct f2fs_sb_info *sbi,
				struct rb_root_cached *root,
				struct rb_node **parent,
				unsigned int ofs, bool *leftmost);
struct rb_entry *f2fs_lookup_rb_tree_ret(struct rb_root_cached *root,
		struct rb_entry *cached_re, unsigned int ofs,
		struct rb_entry **prev_entry, struct rb_entry **next_entry,
		struct rb_node ***insert_p, struct rb_node **insert_parent,
		bool force, bool *leftmost);
bool f2fs_check_rb_tree_consistence(struct f2fs_sb_info *sbi,
				struct rb_root_cached *root, bool check_key);
unsigned int f2fs_shrink_extent_tree(struct f2fs_sb_info *sbi, int nr_shrink);
void f2fs_init_extent_tree(struct inode *inode, struct page *ipage);
void f2fs_drop_extent_tree(struct inode *inode);
unsigned int f2fs_destroy_extent_node(struct inode *inode);
void f2fs_destroy_extent_tree(struct inode *inode);
bool f2fs_lookup_extent_cache(struct inode *inode, pgoff_t pgofs,
			struct extent_info *ei);
void f2fs_update_extent_cache(struct dnode_of_data *dn);
void f2fs_update_extent_cache_range(struct dnode_of_data *dn,
			pgoff_t fofs, block_t blkaddr, unsigned int len);
void f2fs_init_extent_cache_info(struct f2fs_sb_info *sbi);
int __init f2fs_create_extent_cache(void);
void f2fs_destroy_extent_cache(void);

/*
 * sysfs.c
 */
int __init f2fs_init_sysfs(void);
void f2fs_exit_sysfs(void);
int f2fs_register_sysfs(struct f2fs_sb_info *sbi);
void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi);

/* verity.c */
extern const struct fsverity_operations f2fs_verityops;

/*
 * crypto support
 */
static inline bool f2fs_encrypted_file(struct inode *inode)
{
	return IS_ENCRYPTED(inode) && S_ISREG(inode->i_mode);
}

static inline void f2fs_set_encrypted_inode(struct inode *inode)
{
#ifdef CONFIG_FS_ENCRYPTION
	file_set_encrypt(inode);
	f2fs_set_inode_flags(inode);
#endif
}

/*
 * Returns true if the reads of the inode's data need to undergo some
 * postprocessing step, like decryption or authenticity verification.
 */
static inline bool f2fs_post_read_required(struct inode *inode)
{
	return f2fs_encrypted_file(inode) || fsverity_active(inode) ||
		f2fs_compressed_file(inode);
}

/*
 * compress.c
 */
#ifdef CONFIG_F2FS_FS_COMPRESSION
bool f2fs_is_compressed_page(struct page *page);
struct page *f2fs_compress_control_page(struct page *page);
int f2fs_prepare_compress_overwrite(struct inode *inode,
			struct page **pagep, pgoff_t index, void **fsdata);
bool f2fs_compress_write_end(struct inode *inode, void *fsdata,
					pgoff_t index, unsigned copied);
int f2fs_truncate_partial_cluster(struct inode *inode, u64 from, bool lock);
void f2fs_compress_write_end_io(struct bio *bio, struct page *page);
bool f2fs_is_compress_backend_ready(struct inode *inode);
int f2fs_init_compress_mempool(void);
void f2fs_destroy_compress_mempool(void);
void f2fs_end_read_compressed_page(struct page *page, bool failed);
bool f2fs_cluster_is_empty(struct compress_ctx *cc);
bool f2fs_cluster_can_merge_page(struct compress_ctx *cc, pgoff_t index);
void f2fs_compress_ctx_add_page(struct compress_ctx *cc, struct page *page);
int f2fs_write_multi_pages(struct compress_ctx *cc,
						int *submitted,
						struct writeback_control *wbc,
						enum iostat_type io_type);
int f2fs_is_compressed_cluster(struct inode *inode, pgoff_t index);
int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,
				unsigned nr_pages, sector_t *last_block_in_bio,
				bool is_readahead, bool for_write);
struct decompress_io_ctx *f2fs_alloc_dic(struct compress_ctx *cc);
void f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed);
void f2fs_put_page_dic(struct page *page);
int f2fs_init_compress_ctx(struct compress_ctx *cc);
void f2fs_destroy_compress_ctx(struct compress_ctx *cc);
void f2fs_init_compress_info(struct f2fs_sb_info *sbi);
int f2fs_init_page_array_cache(struct f2fs_sb_info *sbi);
void f2fs_destroy_page_array_cache(struct f2fs_sb_info *sbi);
int __init f2fs_init_compress_cache(void);
void f2fs_destroy_compress_cache(void);
#else
static inline bool f2fs_is_compressed_page(struct page *page) { return false; }
static inline bool f2fs_is_compress_backend_ready(struct inode *inode)
{
	if (!f2fs_compressed_file(inode))
		return true;
	/* not support compression */
	return false;
}
static inline struct page *f2fs_compress_control_page(struct page *page)
{
	WARN_ON_ONCE(1);
	return ERR_PTR(-EINVAL);
}
static inline int f2fs_init_compress_mempool(void) { return 0; }
static inline void f2fs_destroy_compress_mempool(void) { }
static inline void f2fs_end_read_compressed_page(struct page *page, bool failed)
{
	WARN_ON_ONCE(1);
}
static inline void f2fs_put_page_dic(struct page *page)
{
	WARN_ON_ONCE(1);
}
static inline int f2fs_init_page_array_cache(struct f2fs_sb_info *sbi) { return 0; }
static inline void f2fs_destroy_page_array_cache(struct f2fs_sb_info *sbi) { }
static inline int __init f2fs_init_compress_cache(void) { return 0; }
static inline void f2fs_destroy_compress_cache(void) { }
#endif

static inline void set_compress_context(struct inode *inode)
{
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);

	F2FS_I(inode)->i_compress_algorithm =
			F2FS_OPTION(sbi).compress_algorithm;
	F2FS_I(inode)->i_log_cluster_size =
			F2FS_OPTION(sbi).compress_log_size;
	F2FS_I(inode)->i_compress_flag =
			F2FS_OPTION(sbi).compress_chksum ?
				1 << COMPRESS_CHKSUM : 0;
	F2FS_I(inode)->i_cluster_size =
			1 << F2FS_I(inode)->i_log_cluster_size;
	if (F2FS_I(inode)->i_compress_algorithm == COMPRESS_LZ4 &&
			F2FS_OPTION(sbi).compress_level)
		F2FS_I(inode)->i_compress_flag |=
				F2FS_OPTION(sbi).compress_level <<
				COMPRESS_LEVEL_OFFSET;
	F2FS_I(inode)->i_flags |= F2FS_COMPR_FL;
	set_inode_flag(inode, FI_COMPRESSED_FILE);
	stat_inc_compr_inode(inode);
	f2fs_mark_inode_dirty_sync(inode, true);
}

static inline bool f2fs_disable_compressed_file(struct inode *inode)
{
	struct f2fs_inode_info *fi = F2FS_I(inode);

	if (!f2fs_compressed_file(inode))
		return true;
	if (S_ISREG(inode->i_mode) &&
		(get_dirty_pages(inode) || atomic_read(&fi->i_compr_blocks)))
		return false;

	fi->i_flags &= ~F2FS_COMPR_FL;
	stat_dec_compr_inode(inode);
	clear_inode_flag(inode, FI_COMPRESSED_FILE);
	f2fs_mark_inode_dirty_sync(inode, true);
	return true;
}

#define F2FS_FEATURE_FUNCS(name, flagname) \
static inline int f2fs_sb_has_##name(struct f2fs_sb_info *sbi) \
{ \
	return F2FS_HAS_FEATURE(sbi, F2FS_FEATURE_##flagname); \
}

F2FS_FEATURE_FUNCS(encrypt, ENCRYPT);
F2FS_FEATURE_FUNCS(blkzoned, BLKZONED);
F2FS_FEATURE_FUNCS(extra_attr, EXTRA_ATTR);
F2FS_FEATURE_FUNCS(project_quota, PRJQUOTA);
F2FS_FEATURE_FUNCS(inode_chksum, INODE_CHKSUM);
F2FS_FEATURE_FUNCS(flexible_inline_xattr, FLEXIBLE_INLINE_XATTR);
F2FS_FEATURE_FUNCS(quota_ino, QUOTA_INO);
F2FS_FEATURE_FUNCS(inode_crtime, INODE_CRTIME);
F2FS_FEATURE_FUNCS(lost_found, LOST_FOUND);
F2FS_FEATURE_FUNCS(verity, VERITY);
F2FS_FEATURE_FUNCS(sb_chksum, SB_CHKSUM);
F2FS_FEATURE_FUNCS(casefold, CASEFOLD);
F2FS_FEATURE_FUNCS(compression, COMPRESSION);

#ifdef CONFIG_BLK_DEV_ZONED
static inline bool f2fs_blkz_is_seq(struct f2fs_sb_info *sbi, int devi,
				    block_t blkaddr)
{
	unsigned int zno = blkaddr >> sbi->log_blocks_per_blkz;

	return test_bit(zno, FDEV(devi).blkz_seq);
}
#endif

static inline bool f2fs_hw_should_discard(struct f2fs_sb_info *sbi)
{
	return f2fs_sb_has_blkzoned(sbi);
}

static inline bool f2fs_bdev_support_discard(struct block_device *bdev)
{
	return blk_queue_discard(bdev_get_queue(bdev)) ||
	       bdev_is_zoned(bdev);
}

static inline bool f2fs_hw_support_discard(struct f2fs_sb_info *sbi)
{
	int i;

	if (!f2fs_is_multi_device(sbi))
		return f2fs_bdev_support_discard(sbi->sb->s_bdev);

	for (i = 0; i < sbi->s_ndevs; i++)
		if (f2fs_bdev_support_discard(FDEV(i).bdev))
			return true;
	return false;
}

static inline bool f2fs_realtime_discard_enable(struct f2fs_sb_info *sbi)
{
	return (test_opt(sbi, DISCARD) && f2fs_hw_support_discard(sbi)) ||
					f2fs_hw_should_discard(sbi);
}

static inline bool f2fs_hw_is_readonly(struct f2fs_sb_info *sbi)
{
	int i;

	if (!f2fs_is_multi_device(sbi))
		return bdev_read_only(sbi->sb->s_bdev);

	for (i = 0; i < sbi->s_ndevs; i++)
		if (bdev_read_only(FDEV(i).bdev))
			return true;
	return false;
}

static inline bool f2fs_lfs_mode(struct f2fs_sb_info *sbi)
{
	return F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS;
}

static inline bool f2fs_may_compress(struct inode *inode)
{
	if (IS_SWAPFILE(inode) || f2fs_is_pinned_file(inode) ||
				f2fs_is_atomic_file(inode) ||
				f2fs_is_volatile_file(inode))
		return false;
	return S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode);
}

static inline void f2fs_i_compr_blocks_update(struct inode *inode,
						u64 blocks, bool add)
{
	int diff = F2FS_I(inode)->i_cluster_size - blocks;
	struct f2fs_inode_info *fi = F2FS_I(inode);

	/* don't update i_compr_blocks if saved blocks were released */
	if (!add && !atomic_read(&fi->i_compr_blocks))
		return;

	if (add) {
		atomic_add(diff, &fi->i_compr_blocks);
		stat_add_compr_blocks(inode, diff);
	} else {
		atomic_sub(diff, &fi->i_compr_blocks);
		stat_sub_compr_blocks(inode, diff);
	}
	f2fs_mark_inode_dirty_sync(inode, true);
}

static inline int block_unaligned_IO(struct inode *inode,
				struct kiocb *iocb, struct iov_iter *iter)
{
	unsigned int i_blkbits = READ_ONCE(inode->i_blkbits);
	unsigned int blocksize_mask = (1 << i_blkbits) - 1;
	loff_t offset = iocb->ki_pos;
	unsigned long align = offset | iov_iter_alignment(iter);

	return align & blocksize_mask;
}

static inline int allow_outplace_dio(struct inode *inode,
				struct kiocb *iocb, struct iov_iter *iter)
{
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
	int rw = iov_iter_rw(iter);

	return (f2fs_lfs_mode(sbi) && (rw == WRITE) &&
				!block_unaligned_IO(inode, iocb, iter));
}

static inline bool f2fs_force_buffered_io(struct inode *inode,
				struct kiocb *iocb, struct iov_iter *iter)
{
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
	int rw = iov_iter_rw(iter);

	if (f2fs_post_read_required(inode))
		return true;
	if (f2fs_is_multi_device(sbi))
		return true;
	/*
	 * for blkzoned device, fallback direct IO to buffered IO, so
	 * all IOs can be serialized by log-structured write.
	 */
	if (f2fs_sb_has_blkzoned(sbi))
		return true;
	if (f2fs_lfs_mode(sbi) && (rw == WRITE)) {
		if (block_unaligned_IO(inode, iocb, iter))
			return true;
		if (F2FS_IO_ALIGNED(sbi))
			return true;
	}
	if (is_sbi_flag_set(F2FS_I_SB(inode), SBI_CP_DISABLED) &&
					!IS_SWAPFILE(inode))
		return true;

	return false;
}

static inline bool f2fs_need_verity(const struct inode *inode, pgoff_t idx)
{
	return fsverity_active(inode) &&
	       idx < DIV_ROUND_UP(inode->i_size, PAGE_SIZE);
}

#ifdef CONFIG_F2FS_FAULT_INJECTION
extern void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
							unsigned int type);
#else
#define f2fs_build_fault_attr(sbi, rate, type)		do { } while (0)
#endif

static inline bool is_journalled_quota(struct f2fs_sb_info *sbi)
{
#ifdef CONFIG_QUOTA
	if (f2fs_sb_has_quota_ino(sbi))
		return true;
	if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
		F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
		F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
		return true;
#endif
	return false;
}

#define EFSBADCRC	EBADMSG		/* Bad CRC detected */
#define EFSCORRUPTED	EUCLEAN		/* Filesystem is corrupted */

#endif /* _LINUX_F2FS_H */