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321 lines
8.8 KiB
321 lines
8.8 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef BTRFS_ZONED_H |
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#define BTRFS_ZONED_H |
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#include <linux/types.h> |
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#include <linux/blkdev.h> |
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#include "volumes.h" |
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#include "disk-io.h" |
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#include "block-group.h" |
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/* |
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* Block groups with more than this value (percents) of unusable space will be |
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* scheduled for background reclaim. |
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*/ |
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#define BTRFS_DEFAULT_RECLAIM_THRESH 75 |
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struct btrfs_zoned_device_info { |
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/* |
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* Number of zones, zone size and types of zones if bdev is a |
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* zoned block device. |
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*/ |
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u64 zone_size; |
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u8 zone_size_shift; |
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u64 max_zone_append_size; |
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u32 nr_zones; |
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unsigned long *seq_zones; |
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unsigned long *empty_zones; |
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struct blk_zone sb_zones[2 * BTRFS_SUPER_MIRROR_MAX]; |
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}; |
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#ifdef CONFIG_BLK_DEV_ZONED |
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int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, |
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struct blk_zone *zone); |
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int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info); |
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int btrfs_get_dev_zone_info(struct btrfs_device *device); |
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void btrfs_destroy_dev_zone_info(struct btrfs_device *device); |
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int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info); |
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int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info); |
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int btrfs_sb_log_location_bdev(struct block_device *bdev, int mirror, int rw, |
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u64 *bytenr_ret); |
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int btrfs_sb_log_location(struct btrfs_device *device, int mirror, int rw, |
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u64 *bytenr_ret); |
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void btrfs_advance_sb_log(struct btrfs_device *device, int mirror); |
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int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror); |
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u64 btrfs_find_allocatable_zones(struct btrfs_device *device, u64 hole_start, |
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u64 hole_end, u64 num_bytes); |
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int btrfs_reset_device_zone(struct btrfs_device *device, u64 physical, |
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u64 length, u64 *bytes); |
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int btrfs_ensure_empty_zones(struct btrfs_device *device, u64 start, u64 size); |
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int btrfs_load_block_group_zone_info(struct btrfs_block_group *cache, bool new); |
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void btrfs_calc_zone_unusable(struct btrfs_block_group *cache); |
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void btrfs_redirty_list_add(struct btrfs_transaction *trans, |
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struct extent_buffer *eb); |
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void btrfs_free_redirty_list(struct btrfs_transaction *trans); |
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bool btrfs_use_zone_append(struct btrfs_inode *inode, u64 start); |
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void btrfs_record_physical_zoned(struct inode *inode, u64 file_offset, |
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struct bio *bio); |
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void btrfs_rewrite_logical_zoned(struct btrfs_ordered_extent *ordered); |
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bool btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info, |
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struct extent_buffer *eb, |
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struct btrfs_block_group **cache_ret); |
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void btrfs_revert_meta_write_pointer(struct btrfs_block_group *cache, |
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struct extent_buffer *eb); |
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int btrfs_zoned_issue_zeroout(struct btrfs_device *device, u64 physical, u64 length); |
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int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, u64 logical, |
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u64 physical_start, u64 physical_pos); |
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struct btrfs_device *btrfs_zoned_get_device(struct btrfs_fs_info *fs_info, |
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u64 logical, u64 length); |
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#else /* CONFIG_BLK_DEV_ZONED */ |
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static inline int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, |
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struct blk_zone *zone) |
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{ |
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return 0; |
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} |
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static inline int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info) |
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{ |
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return 0; |
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} |
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static inline int btrfs_get_dev_zone_info(struct btrfs_device *device) |
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{ |
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return 0; |
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} |
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static inline void btrfs_destroy_dev_zone_info(struct btrfs_device *device) { } |
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static inline int btrfs_check_zoned_mode(const struct btrfs_fs_info *fs_info) |
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{ |
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if (!btrfs_is_zoned(fs_info)) |
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return 0; |
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btrfs_err(fs_info, "zoned block devices support is not enabled"); |
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return -EOPNOTSUPP; |
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} |
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static inline int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info) |
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{ |
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return 0; |
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} |
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static inline int btrfs_sb_log_location_bdev(struct block_device *bdev, |
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int mirror, int rw, u64 *bytenr_ret) |
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{ |
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*bytenr_ret = btrfs_sb_offset(mirror); |
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return 0; |
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} |
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static inline int btrfs_sb_log_location(struct btrfs_device *device, int mirror, |
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int rw, u64 *bytenr_ret) |
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{ |
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*bytenr_ret = btrfs_sb_offset(mirror); |
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return 0; |
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} |
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static inline void btrfs_advance_sb_log(struct btrfs_device *device, int mirror) |
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{ } |
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static inline int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror) |
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{ |
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return 0; |
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} |
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static inline u64 btrfs_find_allocatable_zones(struct btrfs_device *device, |
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u64 hole_start, u64 hole_end, |
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u64 num_bytes) |
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{ |
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return hole_start; |
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} |
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static inline int btrfs_reset_device_zone(struct btrfs_device *device, |
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u64 physical, u64 length, u64 *bytes) |
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{ |
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*bytes = 0; |
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return 0; |
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} |
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static inline int btrfs_ensure_empty_zones(struct btrfs_device *device, |
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u64 start, u64 size) |
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{ |
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return 0; |
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} |
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static inline int btrfs_load_block_group_zone_info( |
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struct btrfs_block_group *cache, bool new) |
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{ |
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return 0; |
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} |
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static inline void btrfs_calc_zone_unusable(struct btrfs_block_group *cache) { } |
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static inline void btrfs_redirty_list_add(struct btrfs_transaction *trans, |
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struct extent_buffer *eb) { } |
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static inline void btrfs_free_redirty_list(struct btrfs_transaction *trans) { } |
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static inline bool btrfs_use_zone_append(struct btrfs_inode *inode, u64 start) |
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{ |
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return false; |
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} |
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static inline void btrfs_record_physical_zoned(struct inode *inode, |
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u64 file_offset, struct bio *bio) |
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{ |
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} |
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static inline void btrfs_rewrite_logical_zoned( |
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struct btrfs_ordered_extent *ordered) { } |
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static inline bool btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info, |
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struct extent_buffer *eb, |
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struct btrfs_block_group **cache_ret) |
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{ |
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return true; |
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} |
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static inline void btrfs_revert_meta_write_pointer( |
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struct btrfs_block_group *cache, |
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struct extent_buffer *eb) |
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{ |
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} |
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static inline int btrfs_zoned_issue_zeroout(struct btrfs_device *device, |
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u64 physical, u64 length) |
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{ |
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return -EOPNOTSUPP; |
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} |
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static inline int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, |
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u64 logical, u64 physical_start, |
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u64 physical_pos) |
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{ |
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return -EOPNOTSUPP; |
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} |
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static inline struct btrfs_device *btrfs_zoned_get_device( |
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struct btrfs_fs_info *fs_info, |
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u64 logical, u64 length) |
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{ |
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return ERR_PTR(-EOPNOTSUPP); |
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} |
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#endif |
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static inline bool btrfs_dev_is_sequential(struct btrfs_device *device, u64 pos) |
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{ |
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struct btrfs_zoned_device_info *zone_info = device->zone_info; |
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if (!zone_info) |
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return false; |
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return test_bit(pos >> zone_info->zone_size_shift, zone_info->seq_zones); |
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} |
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static inline bool btrfs_dev_is_empty_zone(struct btrfs_device *device, u64 pos) |
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{ |
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struct btrfs_zoned_device_info *zone_info = device->zone_info; |
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if (!zone_info) |
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return true; |
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return test_bit(pos >> zone_info->zone_size_shift, zone_info->empty_zones); |
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} |
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static inline void btrfs_dev_set_empty_zone_bit(struct btrfs_device *device, |
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u64 pos, bool set) |
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{ |
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struct btrfs_zoned_device_info *zone_info = device->zone_info; |
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unsigned int zno; |
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if (!zone_info) |
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return; |
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zno = pos >> zone_info->zone_size_shift; |
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if (set) |
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set_bit(zno, zone_info->empty_zones); |
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else |
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clear_bit(zno, zone_info->empty_zones); |
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} |
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static inline void btrfs_dev_set_zone_empty(struct btrfs_device *device, u64 pos) |
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{ |
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btrfs_dev_set_empty_zone_bit(device, pos, true); |
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} |
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static inline void btrfs_dev_clear_zone_empty(struct btrfs_device *device, u64 pos) |
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{ |
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btrfs_dev_set_empty_zone_bit(device, pos, false); |
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} |
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static inline bool btrfs_check_device_zone_type(const struct btrfs_fs_info *fs_info, |
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struct block_device *bdev) |
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{ |
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if (btrfs_is_zoned(fs_info)) { |
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/* |
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* We can allow a regular device on a zoned filesystem, because |
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* we will emulate the zoned capabilities. |
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*/ |
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if (!bdev_is_zoned(bdev)) |
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return true; |
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return fs_info->zone_size == |
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(bdev_zone_sectors(bdev) << SECTOR_SHIFT); |
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} |
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/* Do not allow Host Manged zoned device */ |
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return bdev_zoned_model(bdev) != BLK_ZONED_HM; |
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} |
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static inline bool btrfs_check_super_location(struct btrfs_device *device, u64 pos) |
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{ |
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/* |
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* On a non-zoned device, any address is OK. On a zoned device, |
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* non-SEQUENTIAL WRITE REQUIRED zones are capable. |
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*/ |
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return device->zone_info == NULL || !btrfs_dev_is_sequential(device, pos); |
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} |
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static inline bool btrfs_can_zone_reset(struct btrfs_device *device, |
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u64 physical, u64 length) |
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{ |
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u64 zone_size; |
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if (!btrfs_dev_is_sequential(device, physical)) |
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return false; |
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zone_size = device->zone_info->zone_size; |
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if (!IS_ALIGNED(physical, zone_size) || !IS_ALIGNED(length, zone_size)) |
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return false; |
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return true; |
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} |
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static inline void btrfs_zoned_meta_io_lock(struct btrfs_fs_info *fs_info) |
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{ |
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if (!btrfs_is_zoned(fs_info)) |
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return; |
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mutex_lock(&fs_info->zoned_meta_io_lock); |
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} |
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static inline void btrfs_zoned_meta_io_unlock(struct btrfs_fs_info *fs_info) |
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{ |
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if (!btrfs_is_zoned(fs_info)) |
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return; |
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mutex_unlock(&fs_info->zoned_meta_io_lock); |
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} |
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static inline void btrfs_clear_treelog_bg(struct btrfs_block_group *bg) |
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{ |
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struct btrfs_fs_info *fs_info = bg->fs_info; |
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if (!btrfs_is_zoned(fs_info)) |
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return; |
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spin_lock(&fs_info->treelog_bg_lock); |
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if (fs_info->treelog_bg == bg->start) |
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fs_info->treelog_bg = 0; |
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spin_unlock(&fs_info->treelog_bg_lock); |
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} |
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#endif
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