btrfs: remove zoned statistics from sysfs

Remove the newly introduced zoned statistics from sysfs, as sysfs can
only show a single page this will truncate the output on a busy
filesystem.

Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

Author: morbidrsa

fs/btrfs/sysfs.c

@@ -26,7 +26,6 @@
 #include "misc.h"
 #include "fs.h"
 #include "accessors.h"
-#include "zoned.h"
 
 /*
  * Structure name                       Path
@@ -1189,56 +1188,6 @@ static ssize_t btrfs_commit_stats_store(struct kobject *kobj,
 }
 BTRFS_ATTR_RW(, commit_stats, btrfs_commit_stats_show, btrfs_commit_stats_store);
 
-static ssize_t btrfs_zoned_stats_show(struct kobject *kobj,
-				      struct kobj_attribute *a, char *buf)
-{
-	struct btrfs_fs_info *fs_info = to_fs_info(kobj);
-	struct btrfs_block_group *bg;
-	size_t ret = 0;
-
-
-	if (!btrfs_is_zoned(fs_info))
-		return ret;
-
-	spin_lock(&fs_info->zone_active_bgs_lock);
-	ret += sysfs_emit_at(buf, ret, "active block-groups: %zu\n",
-			     list_count_nodes(&fs_info->zone_active_bgs));
-	spin_unlock(&fs_info->zone_active_bgs_lock);
-
-	mutex_lock(&fs_info->reclaim_bgs_lock);
-	spin_lock(&fs_info->unused_bgs_lock);
-	ret += sysfs_emit_at(buf, ret, "\treclaimable: %zu\n",
-			     list_count_nodes(&fs_info->reclaim_bgs));
-	ret += sysfs_emit_at(buf, ret, "\tunused: %zu\n",
-			     list_count_nodes(&fs_info->unused_bgs));
-	spin_unlock(&fs_info->unused_bgs_lock);
-	mutex_unlock(&fs_info->reclaim_bgs_lock);
-
-	ret += sysfs_emit_at(buf, ret, "\tneed reclaim: %s\n",
-			     str_true_false(btrfs_zoned_should_reclaim(fs_info)));
-
-	if (fs_info->data_reloc_bg)
-		ret += sysfs_emit_at(buf, ret,
-				     "data relocation block-group: %llu\n",
-				     fs_info->data_reloc_bg);
-	if (fs_info->treelog_bg)
-		ret += sysfs_emit_at(buf, ret,
-				     "tree-log block-group: %llu\n",
-				     fs_info->treelog_bg);
-
-	spin_lock(&fs_info->zone_active_bgs_lock);
-	ret += sysfs_emit_at(buf, ret, "active zones:\n");
-	list_for_each_entry(bg, &fs_info->zone_active_bgs, active_bg_list) {
-		ret += sysfs_emit_at(buf, ret,
-				     "\tstart: %llu, wp: %llu used: %llu, reserved: %llu, unusable: %llu\n",
-				     bg->start, bg->alloc_offset, bg->used,
-				     bg->reserved, bg->zone_unusable);
-	}
-	spin_unlock(&fs_info->zone_active_bgs_lock);
-	return ret;
-}
-BTRFS_ATTR(, zoned_stats, btrfs_zoned_stats_show);
-
 static ssize_t btrfs_clone_alignment_show(struct kobject *kobj,
 				struct kobj_attribute *a, char *buf)
 {
@@ -1651,7 +1600,6 @@ static const struct attribute *btrfs_attrs[] = {
 	BTRFS_ATTR_PTR(, bg_reclaim_threshold),
 	BTRFS_ATTR_PTR(, commit_stats),
 	BTRFS_ATTR_PTR(, temp_fsid),
-	BTRFS_ATTR_PTR(, zoned_stats),
 #ifdef CONFIG_BTRFS_EXPERIMENTAL
 	BTRFS_ATTR_PTR(, offload_csum),
 #endif