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5b316468 NA |
1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | ||
3 | #ifndef BTRFS_ZONED_H | |
4 | #define BTRFS_ZONED_H | |
5 | ||
6 | #include <linux/types.h> | |
b70f5097 | 7 | #include <linux/blkdev.h> |
12659251 NA |
8 | #include "volumes.h" |
9 | #include "disk-io.h" | |
5b316468 NA |
10 | |
11 | struct btrfs_zoned_device_info { | |
12 | /* | |
13 | * Number of zones, zone size and types of zones if bdev is a | |
14 | * zoned block device. | |
15 | */ | |
16 | u64 zone_size; | |
17 | u8 zone_size_shift; | |
862931c7 | 18 | u64 max_zone_append_size; |
5b316468 NA |
19 | u32 nr_zones; |
20 | unsigned long *seq_zones; | |
21 | unsigned long *empty_zones; | |
12659251 | 22 | struct blk_zone sb_zones[2 * BTRFS_SUPER_MIRROR_MAX]; |
5b316468 NA |
23 | }; |
24 | ||
25 | #ifdef CONFIG_BLK_DEV_ZONED | |
26 | int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, | |
27 | struct blk_zone *zone); | |
28 | int btrfs_get_dev_zone_info(struct btrfs_device *device); | |
29 | void btrfs_destroy_dev_zone_info(struct btrfs_device *device); | |
b70f5097 | 30 | int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info); |
5d1ab66c | 31 | int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info); |
12659251 NA |
32 | int btrfs_sb_log_location_bdev(struct block_device *bdev, int mirror, int rw, |
33 | u64 *bytenr_ret); | |
34 | int btrfs_sb_log_location(struct btrfs_device *device, int mirror, int rw, | |
35 | u64 *bytenr_ret); | |
36 | void btrfs_advance_sb_log(struct btrfs_device *device, int mirror); | |
37 | int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror); | |
5b316468 NA |
38 | #else /* CONFIG_BLK_DEV_ZONED */ |
39 | static inline int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, | |
40 | struct blk_zone *zone) | |
41 | { | |
42 | return 0; | |
43 | } | |
44 | ||
45 | static inline int btrfs_get_dev_zone_info(struct btrfs_device *device) | |
46 | { | |
47 | return 0; | |
48 | } | |
49 | ||
50 | static inline void btrfs_destroy_dev_zone_info(struct btrfs_device *device) { } | |
51 | ||
b70f5097 NA |
52 | static inline int btrfs_check_zoned_mode(const struct btrfs_fs_info *fs_info) |
53 | { | |
54 | if (!btrfs_is_zoned(fs_info)) | |
55 | return 0; | |
56 | ||
57 | btrfs_err(fs_info, "zoned block devices support is not enabled"); | |
58 | return -EOPNOTSUPP; | |
59 | } | |
60 | ||
5d1ab66c NA |
61 | static inline int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info) |
62 | { | |
63 | return 0; | |
64 | } | |
65 | ||
12659251 NA |
66 | static inline int btrfs_sb_log_location_bdev(struct block_device *bdev, |
67 | int mirror, int rw, u64 *bytenr_ret) | |
68 | { | |
69 | *bytenr_ret = btrfs_sb_offset(mirror); | |
70 | return 0; | |
71 | } | |
72 | ||
73 | static inline int btrfs_sb_log_location(struct btrfs_device *device, int mirror, | |
74 | int rw, u64 *bytenr_ret) | |
75 | { | |
76 | *bytenr_ret = btrfs_sb_offset(mirror); | |
77 | return 0; | |
78 | } | |
79 | ||
80 | static inline void btrfs_advance_sb_log(struct btrfs_device *device, int mirror) | |
81 | { } | |
82 | ||
83 | static inline int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror) | |
84 | { | |
85 | return 0; | |
86 | } | |
87 | ||
5b316468 NA |
88 | #endif |
89 | ||
90 | static inline bool btrfs_dev_is_sequential(struct btrfs_device *device, u64 pos) | |
91 | { | |
92 | struct btrfs_zoned_device_info *zone_info = device->zone_info; | |
93 | ||
94 | if (!zone_info) | |
95 | return false; | |
96 | ||
97 | return test_bit(pos >> zone_info->zone_size_shift, zone_info->seq_zones); | |
98 | } | |
99 | ||
100 | static inline bool btrfs_dev_is_empty_zone(struct btrfs_device *device, u64 pos) | |
101 | { | |
102 | struct btrfs_zoned_device_info *zone_info = device->zone_info; | |
103 | ||
104 | if (!zone_info) | |
105 | return true; | |
106 | ||
107 | return test_bit(pos >> zone_info->zone_size_shift, zone_info->empty_zones); | |
108 | } | |
109 | ||
110 | static inline void btrfs_dev_set_empty_zone_bit(struct btrfs_device *device, | |
111 | u64 pos, bool set) | |
112 | { | |
113 | struct btrfs_zoned_device_info *zone_info = device->zone_info; | |
114 | unsigned int zno; | |
115 | ||
116 | if (!zone_info) | |
117 | return; | |
118 | ||
119 | zno = pos >> zone_info->zone_size_shift; | |
120 | if (set) | |
121 | set_bit(zno, zone_info->empty_zones); | |
122 | else | |
123 | clear_bit(zno, zone_info->empty_zones); | |
124 | } | |
125 | ||
126 | static inline void btrfs_dev_set_zone_empty(struct btrfs_device *device, u64 pos) | |
127 | { | |
128 | btrfs_dev_set_empty_zone_bit(device, pos, true); | |
129 | } | |
130 | ||
131 | static inline void btrfs_dev_clear_zone_empty(struct btrfs_device *device, u64 pos) | |
132 | { | |
133 | btrfs_dev_set_empty_zone_bit(device, pos, false); | |
134 | } | |
135 | ||
b70f5097 NA |
136 | static inline bool btrfs_check_device_zone_type(const struct btrfs_fs_info *fs_info, |
137 | struct block_device *bdev) | |
138 | { | |
139 | u64 zone_size; | |
140 | ||
141 | if (btrfs_is_zoned(fs_info)) { | |
142 | zone_size = bdev_zone_sectors(bdev) << SECTOR_SHIFT; | |
143 | /* Do not allow non-zoned device */ | |
144 | return bdev_is_zoned(bdev) && fs_info->zone_size == zone_size; | |
145 | } | |
146 | ||
147 | /* Do not allow Host Manged zoned device */ | |
148 | return bdev_zoned_model(bdev) != BLK_ZONED_HM; | |
149 | } | |
150 | ||
12659251 NA |
151 | static inline bool btrfs_check_super_location(struct btrfs_device *device, u64 pos) |
152 | { | |
153 | /* | |
154 | * On a non-zoned device, any address is OK. On a zoned device, | |
155 | * non-SEQUENTIAL WRITE REQUIRED zones are capable. | |
156 | */ | |
157 | return device->zone_info == NULL || !btrfs_dev_is_sequential(device, pos); | |
158 | } | |
159 | ||
5b316468 | 160 | #endif |