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btrfs: zoned: factor out per-zone logic from btrfs_load_block_group_zone_info
Split out a helper for the body of the per-zone loop in btrfs_load_block_group_zone_info to make the function easier to read and modify. Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Christoph Hellwig
David Sterba
parent
15c12fcc50
commit
09a46725cc
184
fs/btrfs/zoned.c
184
fs/btrfs/zoned.c
@ -1288,19 +1288,103 @@ struct zone_info {
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u64 alloc_offset;
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};
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static int btrfs_load_zone_info(struct btrfs_fs_info *fs_info, int zone_idx,
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struct zone_info *info, unsigned long *active,
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struct map_lookup *map)
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{
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struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;
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struct btrfs_device *device = map->stripes[zone_idx].dev;
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int dev_replace_is_ongoing = 0;
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unsigned int nofs_flag;
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struct blk_zone zone;
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int ret;
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info->physical = map->stripes[zone_idx].physical;
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if (!device->bdev) {
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info->alloc_offset = WP_MISSING_DEV;
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return 0;
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}
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/* Consider a zone as active if we can allow any number of active zones. */
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if (!device->zone_info->max_active_zones)
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__set_bit(zone_idx, active);
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if (!btrfs_dev_is_sequential(device, info->physical)) {
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info->alloc_offset = WP_CONVENTIONAL;
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return 0;
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}
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/* This zone will be used for allocation, so mark this zone non-empty. */
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btrfs_dev_clear_zone_empty(device, info->physical);
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down_read(&dev_replace->rwsem);
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dev_replace_is_ongoing = btrfs_dev_replace_is_ongoing(dev_replace);
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if (dev_replace_is_ongoing && dev_replace->tgtdev != NULL)
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btrfs_dev_clear_zone_empty(dev_replace->tgtdev, info->physical);
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up_read(&dev_replace->rwsem);
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/*
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* The group is mapped to a sequential zone. Get the zone write pointer
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* to determine the allocation offset within the zone.
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*/
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WARN_ON(!IS_ALIGNED(info->physical, fs_info->zone_size));
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nofs_flag = memalloc_nofs_save();
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ret = btrfs_get_dev_zone(device, info->physical, &zone);
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memalloc_nofs_restore(nofs_flag);
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if (ret) {
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if (ret != -EIO && ret != -EOPNOTSUPP)
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return ret;
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info->alloc_offset = WP_MISSING_DEV;
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return 0;
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}
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if (zone.type == BLK_ZONE_TYPE_CONVENTIONAL) {
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btrfs_err_in_rcu(fs_info,
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"zoned: unexpected conventional zone %llu on device %s (devid %llu)",
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zone.start << SECTOR_SHIFT, rcu_str_deref(device->name),
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device->devid);
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return -EIO;
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}
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info->capacity = (zone.capacity << SECTOR_SHIFT);
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switch (zone.cond) {
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case BLK_ZONE_COND_OFFLINE:
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case BLK_ZONE_COND_READONLY:
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btrfs_err(fs_info,
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"zoned: offline/readonly zone %llu on device %s (devid %llu)",
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(info->physical >> device->zone_info->zone_size_shift),
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rcu_str_deref(device->name), device->devid);
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info->alloc_offset = WP_MISSING_DEV;
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break;
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case BLK_ZONE_COND_EMPTY:
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info->alloc_offset = 0;
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break;
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case BLK_ZONE_COND_FULL:
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info->alloc_offset = info->capacity;
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break;
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default:
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/* Partially used zone. */
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info->alloc_offset = ((zone.wp - zone.start) << SECTOR_SHIFT);
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__set_bit(zone_idx, active);
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break;
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}
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return 0;
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}
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int btrfs_load_block_group_zone_info(struct btrfs_block_group *cache, bool new)
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{
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struct btrfs_fs_info *fs_info = cache->fs_info;
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struct extent_map_tree *em_tree = &fs_info->mapping_tree;
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struct extent_map *em;
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struct map_lookup *map;
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struct btrfs_device *device;
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u64 logical = cache->start;
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u64 length = cache->length;
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struct zone_info *zone_info = NULL;
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int ret;
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int i;
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unsigned int nofs_flag;
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unsigned long *active = NULL;
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u64 last_alloc = 0;
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u32 num_sequential = 0, num_conventional = 0;
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@ -1345,98 +1429,14 @@ int btrfs_load_block_group_zone_info(struct btrfs_block_group *cache, bool new)
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}
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for (i = 0; i < map->num_stripes; i++) {
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struct zone_info *info = &zone_info[i];
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bool is_sequential;
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struct blk_zone zone;
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struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;
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int dev_replace_is_ongoing = 0;
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ret = btrfs_load_zone_info(fs_info, i, &zone_info[i], active, map);
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if (ret)
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goto out;
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device = map->stripes[i].dev;
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info->physical = map->stripes[i].physical;
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if (device->bdev == NULL) {
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info->alloc_offset = WP_MISSING_DEV;
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continue;
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}
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is_sequential = btrfs_dev_is_sequential(device, info->physical);
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if (is_sequential)
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num_sequential++;
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else
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if (zone_info[i].alloc_offset == WP_CONVENTIONAL)
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num_conventional++;
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/*
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* Consider a zone as active if we can allow any number of
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* active zones.
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*/
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if (!device->zone_info->max_active_zones)
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__set_bit(i, active);
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if (!is_sequential) {
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info->alloc_offset = WP_CONVENTIONAL;
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continue;
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}
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/*
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* This zone will be used for allocation, so mark this zone
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* non-empty.
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*/
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btrfs_dev_clear_zone_empty(device, info->physical);
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down_read(&dev_replace->rwsem);
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dev_replace_is_ongoing = btrfs_dev_replace_is_ongoing(dev_replace);
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if (dev_replace_is_ongoing && dev_replace->tgtdev != NULL)
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btrfs_dev_clear_zone_empty(dev_replace->tgtdev, info->physical);
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up_read(&dev_replace->rwsem);
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/*
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* The group is mapped to a sequential zone. Get the zone write
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* pointer to determine the allocation offset within the zone.
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*/
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WARN_ON(!IS_ALIGNED(info->physical, fs_info->zone_size));
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nofs_flag = memalloc_nofs_save();
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ret = btrfs_get_dev_zone(device, info->physical, &zone);
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memalloc_nofs_restore(nofs_flag);
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if (ret == -EIO || ret == -EOPNOTSUPP) {
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ret = 0;
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info->alloc_offset = WP_MISSING_DEV;
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continue;
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} else if (ret) {
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goto out;
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}
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if (zone.type == BLK_ZONE_TYPE_CONVENTIONAL) {
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btrfs_err_in_rcu(fs_info,
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"zoned: unexpected conventional zone %llu on device %s (devid %llu)",
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zone.start << SECTOR_SHIFT,
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rcu_str_deref(device->name), device->devid);
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ret = -EIO;
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goto out;
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}
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info->capacity = (zone.capacity << SECTOR_SHIFT);
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switch (zone.cond) {
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case BLK_ZONE_COND_OFFLINE:
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case BLK_ZONE_COND_READONLY:
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btrfs_err(fs_info,
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"zoned: offline/readonly zone %llu on device %s (devid %llu)",
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info->physical >> device->zone_info->zone_size_shift,
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rcu_str_deref(device->name), device->devid);
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info->alloc_offset = WP_MISSING_DEV;
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break;
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case BLK_ZONE_COND_EMPTY:
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info->alloc_offset = 0;
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break;
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case BLK_ZONE_COND_FULL:
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info->alloc_offset = info->capacity;
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break;
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default:
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/* Partially used zone */
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info->alloc_offset = ((zone.wp - zone.start) << SECTOR_SHIFT);
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__set_bit(i, active);
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break;
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}
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else
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num_sequential++;
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}
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if (num_sequential > 0)
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