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Diffstat (limited to '')
| -rw-r--r-- | fs/btrfs/zoned.h | 403 |
1 files changed, 403 insertions, 0 deletions
diff --git a/fs/btrfs/zoned.h b/fs/btrfs/zoned.h new file mode 100644 index 0000000000..b9cec523b7 --- /dev/null +++ b/fs/btrfs/zoned.h @@ -0,0 +1,403 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef BTRFS_ZONED_H +#define BTRFS_ZONED_H + +#include <linux/types.h> +#include <linux/blkdev.h> +#include "messages.h" +#include "volumes.h" +#include "disk-io.h" +#include "block-group.h" +#include "btrfs_inode.h" + +#define BTRFS_DEFAULT_RECLAIM_THRESH (75) + +struct btrfs_zoned_device_info { + /* + * Number of zones, zone size and types of zones if bdev is a + * zoned block device. + */ + u64 zone_size; + u8 zone_size_shift; + u32 nr_zones; + unsigned int max_active_zones; + /* + * Reserved active zones for one metadata and one system block group. + * It can vary per-device depending on the allocation status. + */ + int reserved_active_zones; + atomic_t active_zones_left; + unsigned long *seq_zones; + unsigned long *empty_zones; + unsigned long *active_zones; + struct blk_zone *zone_cache; + struct blk_zone sb_zones[2 * BTRFS_SUPER_MIRROR_MAX]; +}; + +void btrfs_finish_ordered_zoned(struct btrfs_ordered_extent *ordered); + +#ifdef CONFIG_BLK_DEV_ZONED +int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, + struct blk_zone *zone); +int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info); +int btrfs_get_dev_zone_info(struct btrfs_device *device, bool populate_cache); +void btrfs_destroy_dev_zone_info(struct btrfs_device *device); +struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info(struct btrfs_device *orig_dev); +int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info); +int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info); +int btrfs_sb_log_location_bdev(struct block_device *bdev, int mirror, int rw, + u64 *bytenr_ret); +int btrfs_sb_log_location(struct btrfs_device *device, int mirror, int rw, + u64 *bytenr_ret); +int btrfs_advance_sb_log(struct btrfs_device *device, int mirror); +int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror); +u64 btrfs_find_allocatable_zones(struct btrfs_device *device, u64 hole_start, + u64 hole_end, u64 num_bytes); +int btrfs_reset_device_zone(struct btrfs_device *device, u64 physical, + u64 length, u64 *bytes); +int btrfs_ensure_empty_zones(struct btrfs_device *device, u64 start, u64 size); +int btrfs_load_block_group_zone_info(struct btrfs_block_group *cache, bool new); +void btrfs_calc_zone_unusable(struct btrfs_block_group *cache); +void btrfs_redirty_list_add(struct btrfs_transaction *trans, + struct extent_buffer *eb); +bool btrfs_use_zone_append(struct btrfs_bio *bbio); +void btrfs_record_physical_zoned(struct btrfs_bio *bbio); +int btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info, + struct btrfs_eb_write_context *ctx); +int btrfs_zoned_issue_zeroout(struct btrfs_device *device, u64 physical, u64 length); +int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, u64 logical, + u64 physical_start, u64 physical_pos); +bool btrfs_zone_activate(struct btrfs_block_group *block_group); +int btrfs_zone_finish(struct btrfs_block_group *block_group); +bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, u64 flags); +void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, u64 logical, + u64 length); +void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg, + struct extent_buffer *eb); +void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg); +void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info); +bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info); +void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info, u64 logical, + u64 length); +int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info); +int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info, + struct btrfs_space_info *space_info, bool do_finish); +void btrfs_check_active_zone_reservation(struct btrfs_fs_info *fs_info); +#else /* CONFIG_BLK_DEV_ZONED */ +static inline int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, + struct blk_zone *zone) +{ + return 0; +} + +static inline int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info) +{ + return 0; +} + +static inline int btrfs_get_dev_zone_info(struct btrfs_device *device, + bool populate_cache) +{ + return 0; +} + +static inline void btrfs_destroy_dev_zone_info(struct btrfs_device *device) { } + +/* + * In case the kernel is compiled without CONFIG_BLK_DEV_ZONED we'll never call + * into btrfs_clone_dev_zone_info() so it's safe to return NULL here. + */ +static inline struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info( + struct btrfs_device *orig_dev) +{ + return NULL; +} + +static inline int btrfs_check_zoned_mode(const struct btrfs_fs_info *fs_info) +{ + if (!btrfs_is_zoned(fs_info)) + return 0; + + btrfs_err(fs_info, "zoned block devices support is not enabled"); + return -EOPNOTSUPP; +} + +static inline int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info) +{ + return 0; +} + +static inline int btrfs_sb_log_location_bdev(struct block_device *bdev, + int mirror, int rw, u64 *bytenr_ret) +{ + *bytenr_ret = btrfs_sb_offset(mirror); + return 0; +} + +static inline int btrfs_sb_log_location(struct btrfs_device *device, int mirror, + int rw, u64 *bytenr_ret) +{ + *bytenr_ret = btrfs_sb_offset(mirror); + return 0; +} + +static inline int btrfs_advance_sb_log(struct btrfs_device *device, int mirror) +{ + return 0; +} + +static inline int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror) +{ + return 0; +} + +static inline u64 btrfs_find_allocatable_zones(struct btrfs_device *device, + u64 hole_start, u64 hole_end, + u64 num_bytes) +{ + return hole_start; +} + +static inline int btrfs_reset_device_zone(struct btrfs_device *device, + u64 physical, u64 length, u64 *bytes) +{ + *bytes = 0; + return 0; +} + +static inline int btrfs_ensure_empty_zones(struct btrfs_device *device, + u64 start, u64 size) +{ + return 0; +} + +static inline int btrfs_load_block_group_zone_info( + struct btrfs_block_group *cache, bool new) +{ + return 0; +} + +static inline void btrfs_calc_zone_unusable(struct btrfs_block_group *cache) { } + +static inline void btrfs_redirty_list_add(struct btrfs_transaction *trans, + struct extent_buffer *eb) { } + +static inline bool btrfs_use_zone_append(struct btrfs_bio *bbio) +{ + return false; +} + +static inline void btrfs_record_physical_zoned(struct btrfs_bio *bbio) +{ +} + +static inline int btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info, + struct btrfs_eb_write_context *ctx) +{ + return 0; +} + +static inline int btrfs_zoned_issue_zeroout(struct btrfs_device *device, + u64 physical, u64 length) +{ + return -EOPNOTSUPP; +} + +static inline int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, + u64 logical, u64 physical_start, + u64 physical_pos) +{ + return -EOPNOTSUPP; +} + +static inline bool btrfs_zone_activate(struct btrfs_block_group *block_group) +{ + return true; +} + +static inline int btrfs_zone_finish(struct btrfs_block_group *block_group) +{ + return 0; +} + +static inline bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, + u64 flags) +{ + return true; +} + +static inline void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, + u64 logical, u64 length) { } + +static inline void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg, + struct extent_buffer *eb) { } + +static inline void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg) { } + +static inline void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info) { } + +static inline bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info) +{ + return false; +} + +static inline void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info, + u64 logical, u64 length) { } + +static inline int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info) +{ + return 1; +} + +static inline int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info, + struct btrfs_space_info *space_info, + bool do_finish) +{ + /* Consider all the block groups are active */ + return 0; +} + +static inline void btrfs_check_active_zone_reservation(struct btrfs_fs_info *fs_info) { } + +#endif + +static inline bool btrfs_dev_is_sequential(struct btrfs_device *device, u64 pos) +{ + struct btrfs_zoned_device_info *zone_info = device->zone_info; + + if (!zone_info) + return false; + + return test_bit(pos >> zone_info->zone_size_shift, zone_info->seq_zones); +} + +static inline bool btrfs_dev_is_empty_zone(struct btrfs_device *device, u64 pos) +{ + struct btrfs_zoned_device_info *zone_info = device->zone_info; + + if (!zone_info) + return true; + + return test_bit(pos >> zone_info->zone_size_shift, zone_info->empty_zones); +} + +static inline void btrfs_dev_set_empty_zone_bit(struct btrfs_device *device, + u64 pos, bool set) +{ + struct btrfs_zoned_device_info *zone_info = device->zone_info; + unsigned int zno; + + if (!zone_info) + return; + + zno = pos >> zone_info->zone_size_shift; + if (set) + set_bit(zno, zone_info->empty_zones); + else + clear_bit(zno, zone_info->empty_zones); +} + +static inline void btrfs_dev_set_zone_empty(struct btrfs_device *device, u64 pos) +{ + btrfs_dev_set_empty_zone_bit(device, pos, true); +} + +static inline void btrfs_dev_clear_zone_empty(struct btrfs_device *device, u64 pos) +{ + btrfs_dev_set_empty_zone_bit(device, pos, false); +} + +static inline bool btrfs_check_device_zone_type(const struct btrfs_fs_info *fs_info, + struct block_device *bdev) +{ + if (btrfs_is_zoned(fs_info)) { + /* + * We can allow a regular device on a zoned filesystem, because + * we will emulate the zoned capabilities. + */ + if (!bdev_is_zoned(bdev)) + return true; + + return fs_info->zone_size == + (bdev_zone_sectors(bdev) << SECTOR_SHIFT); + } + + /* Do not allow Host Manged zoned device */ + return bdev_zoned_model(bdev) != BLK_ZONED_HM; +} + +static inline bool btrfs_check_super_location(struct btrfs_device *device, u64 pos) +{ + /* + * On a non-zoned device, any address is OK. On a zoned device, + * non-SEQUENTIAL WRITE REQUIRED zones are capable. + */ + return device->zone_info == NULL || !btrfs_dev_is_sequential(device, pos); +} + +static inline bool btrfs_can_zone_reset(struct btrfs_device *device, + u64 physical, u64 length) +{ + u64 zone_size; + + if (!btrfs_dev_is_sequential(device, physical)) + return false; + + zone_size = device->zone_info->zone_size; + if (!IS_ALIGNED(physical, zone_size) || !IS_ALIGNED(length, zone_size)) + return false; + + return true; +} + +static inline void btrfs_zoned_meta_io_lock(struct btrfs_fs_info *fs_info) +{ + if (!btrfs_is_zoned(fs_info)) + return; + mutex_lock(&fs_info->zoned_meta_io_lock); +} + +static inline void btrfs_zoned_meta_io_unlock(struct btrfs_fs_info *fs_info) +{ + if (!btrfs_is_zoned(fs_info)) + return; + mutex_unlock(&fs_info->zoned_meta_io_lock); +} + +static inline void btrfs_clear_treelog_bg(struct btrfs_block_group *bg) +{ + struct btrfs_fs_info *fs_info = bg->fs_info; + + if (!btrfs_is_zoned(fs_info)) + return; + + spin_lock(&fs_info->treelog_bg_lock); + if (fs_info->treelog_bg == bg->start) + fs_info->treelog_bg = 0; + spin_unlock(&fs_info->treelog_bg_lock); +} + +static inline void btrfs_zoned_data_reloc_lock(struct btrfs_inode *inode) +{ + struct btrfs_root *root = inode->root; + + if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info)) + mutex_lock(&root->fs_info->zoned_data_reloc_io_lock); +} + +static inline void btrfs_zoned_data_reloc_unlock(struct btrfs_inode *inode) +{ + struct btrfs_root *root = inode->root; + + if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info)) + mutex_unlock(&root->fs_info->zoned_data_reloc_io_lock); +} + +static inline bool btrfs_zoned_bg_is_full(const struct btrfs_block_group *bg) +{ + ASSERT(btrfs_is_zoned(bg->fs_info)); + return (bg->alloc_offset == bg->zone_capacity); +} + +#endif |