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-rw-r--r--fs/btrfs/zoned.h403
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