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71df088c1c
The btrfs zoned completion code currently needs an ordered_extent and extent_map per bio so that it can account for the non-predictable write location from Zone Append. To archive that it currently splits the ordered_extent and extent_map at I/O submission time, and then records the actual physical address in the ->physical field of the ordered_extent. This patch instead switches to record the "original" physical address that the btrfs allocator assigned in spare space in the btrfs_bio, and then rewrites the logical address in the btrfs_ordered_sum structure at I/O completion time. This allows the ordered extent completion handler to simply walk the list of ordered csums and split the ordered extent as needed. This removes an extra ordered extent and extent_map lookup and manipulation during the I/O submission path, and instead batches it in the I/O completion path where we need to touch these anyway. Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David Sterba <dsterba@suse.com>
405 lines
11 KiB
C
405 lines
11 KiB
C
/* 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 "messages.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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#include "btrfs_inode.h"
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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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u32 nr_zones;
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unsigned int max_active_zones;
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atomic_t active_zones_left;
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unsigned long *seq_zones;
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unsigned long *empty_zones;
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unsigned long *active_zones;
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struct blk_zone *zone_cache;
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struct blk_zone sb_zones[2 * BTRFS_SUPER_MIRROR_MAX];
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};
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void btrfs_finish_ordered_zoned(struct btrfs_ordered_extent *ordered);
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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, bool populate_cache);
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void btrfs_destroy_dev_zone_info(struct btrfs_device *device);
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struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info(struct btrfs_device *orig_dev);
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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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int 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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bool btrfs_use_zone_append(struct btrfs_bio *bbio);
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void btrfs_record_physical_zoned(struct btrfs_bio *bbio);
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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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bool btrfs_zone_activate(struct btrfs_block_group *block_group);
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int btrfs_zone_finish(struct btrfs_block_group *block_group);
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bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, u64 flags);
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void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, u64 logical,
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u64 length);
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void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg,
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struct extent_buffer *eb);
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void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg);
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void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info);
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bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info);
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void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info, u64 logical,
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u64 length);
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int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info);
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int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info,
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struct btrfs_space_info *space_info, bool do_finish);
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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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bool populate_cache)
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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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/*
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* In case the kernel is compiled without CONFIG_BLK_DEV_ZONED we'll never call
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* into btrfs_clone_dev_zone_info() so it's safe to return NULL here.
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*/
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static inline struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info(
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struct btrfs_device *orig_dev)
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{
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return NULL;
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}
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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 int btrfs_advance_sb_log(struct btrfs_device *device, int mirror)
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{
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return 0;
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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 bool btrfs_use_zone_append(struct btrfs_bio *bbio)
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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 btrfs_bio *bbio)
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{
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}
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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 bool btrfs_zone_activate(struct btrfs_block_group *block_group)
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{
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return true;
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}
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static inline int btrfs_zone_finish(struct btrfs_block_group *block_group)
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{
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return 0;
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}
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static inline bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices,
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u64 flags)
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{
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return true;
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}
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static inline void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info,
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u64 logical, u64 length) { }
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static inline void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg,
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struct extent_buffer *eb) { }
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static inline void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg) { }
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static inline void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info) { }
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static inline bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info)
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{
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return false;
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}
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static inline void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info,
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u64 logical, u64 length) { }
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static inline int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info)
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{
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return 1;
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}
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static inline int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info,
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struct btrfs_space_info *space_info,
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bool do_finish)
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{
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/* Consider all the block groups are active */
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return 0;
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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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static inline void btrfs_zoned_data_reloc_lock(struct btrfs_inode *inode)
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{
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struct btrfs_root *root = inode->root;
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if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info))
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mutex_lock(&root->fs_info->zoned_data_reloc_io_lock);
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}
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static inline void btrfs_zoned_data_reloc_unlock(struct btrfs_inode *inode)
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{
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struct btrfs_root *root = inode->root;
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if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info))
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mutex_unlock(&root->fs_info->zoned_data_reloc_io_lock);
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}
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static inline bool btrfs_zoned_bg_is_full(const struct btrfs_block_group *bg)
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{
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ASSERT(btrfs_is_zoned(bg->fs_info));
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return (bg->alloc_offset == bg->zone_capacity);
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}
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#endif
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