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2024-05-10 9999e48639b3cecb08ffb37358bcba3b48161b29 
 kernel/fs/btrfs/free-space-tree.c
....@@ -10,24 +10,28 @@
1010 #include "locking.h"
1111 #include "free-space-tree.h"
1212 #include "transaction.h"
13
+#include "block-group.h"
1314 
1415 static int __add_block_group_free_space(struct btrfs_trans_handle *trans,
15
-					struct btrfs_block_group_cache *block_group,
16
+					struct btrfs_block_group *block_group,
1617 					struct btrfs_path *path);
1718 
18
-void set_free_space_tree_thresholds(struct btrfs_block_group_cache *cache)
19
+void set_free_space_tree_thresholds(struct btrfs_block_group *cache)
1920 {
2021 	u32 bitmap_range;
2122 	size_t bitmap_size;
2223 	u64 num_bitmaps, total_bitmap_size;
24
+
25
+	if (WARN_ON(cache->length == 0))
26
+		btrfs_warn(cache->fs_info, "block group %llu length is zero",
27
+			   cache->start);
2328 
2429 	/*
2530 	 * We convert to bitmaps when the disk space required for using extents
2631 	 * exceeds that required for using bitmaps.
2732 	 */
2833 	bitmap_range = cache->fs_info->sectorsize * BTRFS_FREE_SPACE_BITMAP_BITS;
29
-	num_bitmaps = div_u64(cache->key.offset + bitmap_range - 1,
30
-			      bitmap_range);
34
+	num_bitmaps = div_u64(cache->length + bitmap_range - 1, bitmap_range);
3135 	bitmap_size = sizeof(struct btrfs_item) + BTRFS_FREE_SPACE_BITMAP_SIZE;
3236 	total_bitmap_size = num_bitmaps * bitmap_size;
3337 	cache->bitmap_high_thresh = div_u64(total_bitmap_size,
....@@ -44,7 +48,7 @@
4448 }
4549 
4650 static int add_new_free_space_info(struct btrfs_trans_handle *trans,
47
-				   struct btrfs_block_group_cache *block_group,
51
+				   struct btrfs_block_group *block_group,
4852 				   struct btrfs_path *path)
4953 {
5054 	struct btrfs_root *root = trans->fs_info->free_space_root;
....@@ -53,9 +57,9 @@
5357 	struct extent_buffer *leaf;
5458 	int ret;
5559 
56
-	key.objectid = block_group->key.objectid;
60
+	key.objectid = block_group->start;
5761 	key.type = BTRFS_FREE_SPACE_INFO_KEY;
58
-	key.offset = block_group->key.offset;
62
+	key.offset = block_group->length;
5963 
6064 	ret = btrfs_insert_empty_item(trans, root, path, &key, sizeof(*info));
6165 	if (ret)
....@@ -74,26 +78,27 @@
7478 	return ret;
7579 }
7680 
77
-struct btrfs_free_space_info *
78
-search_free_space_info(struct btrfs_trans_handle *trans,
79
-		       struct btrfs_fs_info *fs_info,
80
-		       struct btrfs_block_group_cache *block_group,
81
-		       struct btrfs_path *path, int cow)
81
+EXPORT_FOR_TESTS
82
+struct btrfs_free_space_info *search_free_space_info(
83
+		struct btrfs_trans_handle *trans,
84
+		struct btrfs_block_group *block_group,
85
+		struct btrfs_path *path, int cow)
8286 {
87
+	struct btrfs_fs_info *fs_info = block_group->fs_info;
8388 	struct btrfs_root *root = fs_info->free_space_root;
8489 	struct btrfs_key key;
8590 	int ret;
8691 
87
-	key.objectid = block_group->key.objectid;
92
+	key.objectid = block_group->start;
8893 	key.type = BTRFS_FREE_SPACE_INFO_KEY;
89
-	key.offset = block_group->key.offset;
94
+	key.offset = block_group->length;
9095 
9196 	ret = btrfs_search_slot(trans, root, &key, path, 0, cow);
9297 	if (ret < 0)
9398 		return ERR_PTR(ret);
9499 	if (ret != 0) {
95100 		btrfs_warn(fs_info, "missing free space info for %llu",
96
-			   block_group->key.objectid);
101
+			   block_group->start);
97102 		ASSERT(0);
98103 		return ERR_PTR(-ENOENT);
99104 	}
....@@ -176,8 +181,9 @@
176181 	}
177182 }
178183 
184
+EXPORT_FOR_TESTS
179185 int convert_free_space_to_bitmaps(struct btrfs_trans_handle *trans,
180
-				  struct btrfs_block_group_cache *block_group,
186
+				  struct btrfs_block_group *block_group,
181187 				  struct btrfs_path *path)
182188 {
183189 	struct btrfs_fs_info *fs_info = trans->fs_info;
....@@ -194,7 +200,7 @@
194200 	int done = 0, nr;
195201 	int ret;
196202 
197
-	bitmap_size = free_space_bitmap_size(block_group->key.offset,
203
+	bitmap_size = free_space_bitmap_size(block_group->length,
198204 					     fs_info->sectorsize);
199205 	bitmap = alloc_bitmap(bitmap_size);
200206 	if (!bitmap) {
....@@ -202,8 +208,8 @@
202208 		goto out;
203209 	}
204210 
205
-	start = block_group->key.objectid;
206
-	end = block_group->key.objectid + block_group->key.offset;
211
+	start = block_group->start;
212
+	end = block_group->start + block_group->length;
207213 
208214 	key.objectid = end - 1;
209215 	key.type = (u8)-1;
....@@ -221,8 +227,8 @@
221227 			btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0] - 1);
222228 
223229 			if (found_key.type == BTRFS_FREE_SPACE_INFO_KEY) {
224
-				ASSERT(found_key.objectid == block_group->key.objectid);
225
-				ASSERT(found_key.offset == block_group->key.offset);
230
+				ASSERT(found_key.objectid == block_group->start);
231
+				ASSERT(found_key.offset == block_group->length);
226232 				done = 1;
227233 				break;
228234 			} else if (found_key.type == BTRFS_FREE_SPACE_EXTENT_KEY) {
....@@ -252,7 +258,7 @@
252258 		btrfs_release_path(path);
253259 	}
254260 
255
-	info = search_free_space_info(trans, fs_info, block_group, path, 1);
261
+	info = search_free_space_info(trans, block_group, path, 1);
256262 	if (IS_ERR(info)) {
257263 		ret = PTR_ERR(info);
258264 		goto out;
....@@ -268,7 +274,7 @@
268274 	if (extent_count != expected_extent_count) {
269275 		btrfs_err(fs_info,
270276 			  "incorrect extent count for %llu; counted %u, expected %u",
271
-			  block_group->key.objectid, extent_count,
277
+			  block_group->start, extent_count,
272278 			  expected_extent_count);
273279 		ASSERT(0);
274280 		ret = -EIO;
....@@ -315,8 +321,9 @@
315321 	return ret;
316322 }
317323 
324
+EXPORT_FOR_TESTS
318325 int convert_free_space_to_extents(struct btrfs_trans_handle *trans,
319
-				  struct btrfs_block_group_cache *block_group,
326
+				  struct btrfs_block_group *block_group,
320327 				  struct btrfs_path *path)
321328 {
322329 	struct btrfs_fs_info *fs_info = trans->fs_info;
....@@ -332,7 +339,7 @@
332339 	int done = 0, nr;
333340 	int ret;
334341 
335
-	bitmap_size = free_space_bitmap_size(block_group->key.offset,
342
+	bitmap_size = free_space_bitmap_size(block_group->length,
336343 					     fs_info->sectorsize);
337344 	bitmap = alloc_bitmap(bitmap_size);
338345 	if (!bitmap) {
....@@ -340,8 +347,8 @@
340347 		goto out;
341348 	}
342349 
343
-	start = block_group->key.objectid;
344
-	end = block_group->key.objectid + block_group->key.offset;
350
+	start = block_group->start;
351
+	end = block_group->start + block_group->length;
345352 
346353 	key.objectid = end - 1;
347354 	key.type = (u8)-1;
....@@ -359,8 +366,8 @@
359366 			btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0] - 1);
360367 
361368 			if (found_key.type == BTRFS_FREE_SPACE_INFO_KEY) {
362
-				ASSERT(found_key.objectid == block_group->key.objectid);
363
-				ASSERT(found_key.offset == block_group->key.offset);
369
+				ASSERT(found_key.objectid == block_group->start);
370
+				ASSERT(found_key.offset == block_group->length);
364371 				done = 1;
365372 				break;
366373 			} else if (found_key.type == BTRFS_FREE_SPACE_BITMAP_KEY) {
....@@ -396,7 +403,7 @@
396403 		btrfs_release_path(path);
397404 	}
398405 
399
-	info = search_free_space_info(trans, fs_info, block_group, path, 1);
406
+	info = search_free_space_info(trans, block_group, path, 1);
400407 	if (IS_ERR(info)) {
401408 		ret = PTR_ERR(info);
402409 		goto out;
....@@ -409,7 +416,7 @@
409416 	btrfs_mark_buffer_dirty(leaf);
410417 	btrfs_release_path(path);
411418 
412
-	nrbits = div_u64(block_group->key.offset, block_group->fs_info->sectorsize);
419
+	nrbits = div_u64(block_group->length, block_group->fs_info->sectorsize);
413420 	start_bit = find_next_bit_le(bitmap, nrbits, 0);
414421 
415422 	while (start_bit < nrbits) {
....@@ -433,7 +440,7 @@
433440 	if (extent_count != expected_extent_count) {
434441 		btrfs_err(fs_info,
435442 			  "incorrect extent count for %llu; counted %u, expected %u",
436
-			  block_group->key.objectid, extent_count,
443
+			  block_group->start, extent_count,
437444 			  expected_extent_count);
438445 		ASSERT(0);
439446 		ret = -EIO;
....@@ -449,7 +456,7 @@
449456 }
450457 
451458 static int update_free_space_extent_count(struct btrfs_trans_handle *trans,
452
-					  struct btrfs_block_group_cache *block_group,
459
+					  struct btrfs_block_group *block_group,
453460 					  struct btrfs_path *path,
454461 					  int new_extents)
455462 {
....@@ -461,8 +468,7 @@
461468 	if (new_extents == 0)
462469 		return 0;
463470 
464
-	info = search_free_space_info(trans, trans->fs_info, block_group, path,
465
-				      1);
471
+	info = search_free_space_info(trans, block_group, path, 1);
466472 	if (IS_ERR(info)) {
467473 		ret = PTR_ERR(info);
468474 		goto out;
....@@ -487,7 +493,8 @@
487493 	return ret;
488494 }
489495 
490
-int free_space_test_bit(struct btrfs_block_group_cache *block_group,
496
+EXPORT_FOR_TESTS
497
+int free_space_test_bit(struct btrfs_block_group *block_group,
491498 			struct btrfs_path *path, u64 offset)
492499 {
493500 	struct extent_buffer *leaf;
....@@ -509,7 +516,7 @@
509516 	return !!extent_buffer_test_bit(leaf, ptr, i);
510517 }
511518 
512
-static void free_space_set_bits(struct btrfs_block_group_cache *block_group,
519
+static void free_space_set_bits(struct btrfs_block_group *block_group,
513520 				struct btrfs_path *path, u64 *start, u64 *size,
514521 				int bit)
515522 {
....@@ -577,7 +584,7 @@
577584  * the bitmap.
578585  */
579586 static int modify_free_space_bitmap(struct btrfs_trans_handle *trans,
580
-				    struct btrfs_block_group_cache *block_group,
587
+				    struct btrfs_block_group *block_group,
581588 				    struct btrfs_path *path,
582589 				    u64 start, u64 size, int remove)
583590 {
....@@ -593,7 +600,7 @@
593600 	 * Read the bit for the block immediately before the extent of space if
594601 	 * that block is within the block group.
595602 	 */
596
-	if (start > block_group->key.objectid) {
603
+	if (start > block_group->start) {
597604 		u64 prev_block = start - block_group->fs_info->sectorsize;
598605 
599606 		key.objectid = prev_block;
....@@ -645,7 +652,7 @@
645652 	 * Read the bit for the block immediately after the extent of space if
646653 	 * that block is within the block group.
647654 	 */
648
-	if (end < block_group->key.objectid + block_group->key.offset) {
655
+	if (end < block_group->start + block_group->length) {
649656 		/* The next block may be in the next bitmap. */
650657 		btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
651658 		if (end >= key.objectid + key.offset) {
....@@ -690,7 +697,7 @@
690697 }
691698 
692699 static int remove_free_space_extent(struct btrfs_trans_handle *trans,
693
-				    struct btrfs_block_group_cache *block_group,
700
+				    struct btrfs_block_group *block_group,
694701 				    struct btrfs_path *path,
695702 				    u64 start, u64 size)
696703 {
....@@ -775,8 +782,9 @@
775782 	return ret;
776783 }
777784 
785
+EXPORT_FOR_TESTS
778786 int __remove_from_free_space_tree(struct btrfs_trans_handle *trans,
779
-				  struct btrfs_block_group_cache *block_group,
787
+				  struct btrfs_block_group *block_group,
780788 				  struct btrfs_path *path, u64 start, u64 size)
781789 {
782790 	struct btrfs_free_space_info *info;
....@@ -789,8 +797,7 @@
789797 			return ret;
790798 	}
791799 
792
-	info = search_free_space_info(NULL, trans->fs_info, block_group, path,
793
-				      0);
800
+	info = search_free_space_info(NULL, block_group, path, 0);
794801 	if (IS_ERR(info))
795802 		return PTR_ERR(info);
796803 	flags = btrfs_free_space_flags(path->nodes[0], info);
....@@ -808,7 +815,7 @@
808815 int remove_from_free_space_tree(struct btrfs_trans_handle *trans,
809816 				u64 start, u64 size)
810817 {
811
-	struct btrfs_block_group_cache *block_group;
818
+	struct btrfs_block_group *block_group;
812819 	struct btrfs_path *path;
813820 	int ret;
814821 
....@@ -842,7 +849,7 @@
842849 }
843850 
844851 static int add_free_space_extent(struct btrfs_trans_handle *trans,
845
-				 struct btrfs_block_group_cache *block_group,
852
+				 struct btrfs_block_group *block_group,
846853 				 struct btrfs_path *path,
847854 				 u64 start, u64 size)
848855 {
....@@ -876,7 +883,7 @@
876883 	new_key.offset = size;
877884 
878885 	/* Search for a neighbor on the left. */
879
-	if (start == block_group->key.objectid)
886
+	if (start == block_group->start)
880887 		goto right;
881888 	key.objectid = start - 1;
882889 	key.type = (u8)-1;
....@@ -896,8 +903,8 @@
896903 
897904 	found_start = key.objectid;
898905 	found_end = key.objectid + key.offset;
899
-	ASSERT(found_start >= block_group->key.objectid &&
900
-	       found_end > block_group->key.objectid);
906
+	ASSERT(found_start >= block_group->start &&
907
+	       found_end > block_group->start);
901908 	ASSERT(found_start < start && found_end <= start);
902909 
903910 	/*
....@@ -916,7 +923,7 @@
916923 
917924 right:
918925 	/* Search for a neighbor on the right. */
919
-	if (end == block_group->key.objectid + block_group->key.offset)
926
+	if (end == block_group->start + block_group->length)
920927 		goto insert;
921928 	key.objectid = end;
922929 	key.type = (u8)-1;
....@@ -936,8 +943,8 @@
936943 
937944 	found_start = key.objectid;
938945 	found_end = key.objectid + key.offset;
939
-	ASSERT(found_start >= block_group->key.objectid &&
940
-	       found_end > block_group->key.objectid);
946
+	ASSERT(found_start >= block_group->start &&
947
+	       found_end > block_group->start);
941948 	ASSERT((found_start < start && found_end <= start) ||
942949 	       (found_start >= end && found_end > end));
943950 
....@@ -968,11 +975,11 @@
968975 	return ret;
969976 }
970977 
978
+EXPORT_FOR_TESTS
971979 int __add_to_free_space_tree(struct btrfs_trans_handle *trans,
972
-			     struct btrfs_block_group_cache *block_group,
980
+			     struct btrfs_block_group *block_group,
973981 			     struct btrfs_path *path, u64 start, u64 size)
974982 {
975
-	struct btrfs_fs_info *fs_info = trans->fs_info;
976983 	struct btrfs_free_space_info *info;
977984 	u32 flags;
978985 	int ret;
....@@ -983,7 +990,7 @@
983990 			return ret;
984991 	}
985992 
986
-	info = search_free_space_info(NULL, fs_info, block_group, path, 0);
993
+	info = search_free_space_info(NULL, block_group, path, 0);
987994 	if (IS_ERR(info))
988995 		return PTR_ERR(info);
989996 	flags = btrfs_free_space_flags(path->nodes[0], info);
....@@ -1001,7 +1008,7 @@
10011008 int add_to_free_space_tree(struct btrfs_trans_handle *trans,
10021009 			   u64 start, u64 size)
10031010 {
1004
-	struct btrfs_block_group_cache *block_group;
1011
+	struct btrfs_block_group *block_group;
10051012 	struct btrfs_path *path;
10061013 	int ret;
10071014 
....@@ -1039,7 +1046,7 @@
10391046  * through the normal add/remove hooks.
10401047  */
10411048 static int populate_free_space_tree(struct btrfs_trans_handle *trans,
1042
-				    struct btrfs_block_group_cache *block_group)
1049
+				    struct btrfs_block_group *block_group)
10431050 {
10441051 	struct btrfs_root *extent_root = trans->fs_info->extent_root;
10451052 	struct btrfs_path *path, *path2;
....@@ -1071,7 +1078,7 @@
10711078 	 * BLOCK_GROUP_ITEM, so an extent may precede the block group that it's
10721079 	 * contained in.
10731080 	 */
1074
-	key.objectid = block_group->key.objectid;
1081
+	key.objectid = block_group->start;
10751082 	key.type = BTRFS_EXTENT_ITEM_KEY;
10761083 	key.offset = 0;
10771084 
....@@ -1080,8 +1087,8 @@
10801087 		goto out_locked;
10811088 	ASSERT(ret == 0);
10821089 
1083
-	start = block_group->key.objectid;
1084
-	end = block_group->key.objectid + block_group->key.offset;
1090
+	start = block_group->start;
1091
+	end = block_group->start + block_group->length;
10851092 	while (1) {
10861093 		btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
10871094 
....@@ -1105,7 +1112,7 @@
11051112 			else
11061113 				start += key.offset;
11071114 		} else if (key.type == BTRFS_BLOCK_GROUP_ITEM_KEY) {
1108
-			if (key.objectid != block_group->key.objectid)
1115
+			if (key.objectid != block_group->start)
11091116 				break;
11101117 		}
11111118 
....@@ -1136,7 +1143,7 @@
11361143 	struct btrfs_trans_handle *trans;
11371144 	struct btrfs_root *tree_root = fs_info->tree_root;
11381145 	struct btrfs_root *free_space_root;
1139
-	struct btrfs_block_group_cache *block_group;
1146
+	struct btrfs_block_group *block_group;
11401147 	struct rb_node *node;
11411148 	int ret;
11421149 
....@@ -1145,7 +1152,8 @@
11451152 		return PTR_ERR(trans);
11461153 
11471154 	set_bit(BTRFS_FS_CREATING_FREE_SPACE_TREE, &fs_info->flags);
1148
-	free_space_root = btrfs_create_tree(trans, fs_info,
1155
+	set_bit(BTRFS_FS_FREE_SPACE_TREE_UNTRUSTED, &fs_info->flags);
1156
+	free_space_root = btrfs_create_tree(trans,
11491157 					    BTRFS_FREE_SPACE_TREE_OBJECTID);
11501158 	if (IS_ERR(free_space_root)) {
11511159 		ret = PTR_ERR(free_space_root);
....@@ -1155,7 +1163,7 @@
11551163 
11561164 	node = rb_first(&fs_info->block_group_cache_tree);
11571165 	while (node) {
1158
-		block_group = rb_entry(node, struct btrfs_block_group_cache,
1166
+		block_group = rb_entry(node, struct btrfs_block_group,
11591167 				       cache_node);
11601168 		ret = populate_free_space_tree(trans, block_group);
11611169 		if (ret)
....@@ -1166,11 +1174,18 @@
11661174 	btrfs_set_fs_compat_ro(fs_info, FREE_SPACE_TREE);
11671175 	btrfs_set_fs_compat_ro(fs_info, FREE_SPACE_TREE_VALID);
11681176 	clear_bit(BTRFS_FS_CREATING_FREE_SPACE_TREE, &fs_info->flags);
1177
+	ret = btrfs_commit_transaction(trans);
11691178 
1170
-	return btrfs_commit_transaction(trans);
1179
+	/*
1180
+	 * Now that we've committed the transaction any reading of our commit
1181
+	 * root will be safe, so we can cache from the free space tree now.
1182
+	 */
1183
+	clear_bit(BTRFS_FS_FREE_SPACE_TREE_UNTRUSTED, &fs_info->flags);
1184
+	return ret;
11711185 
11721186 abort:
11731187 	clear_bit(BTRFS_FS_CREATING_FREE_SPACE_TREE, &fs_info->flags);
1188
+	clear_bit(BTRFS_FS_FREE_SPACE_TREE_UNTRUSTED, &fs_info->flags);
11741189 	btrfs_abort_transaction(trans, ret);
11751190 	btrfs_end_transaction(trans);
11761191 	return ret;
....@@ -1243,14 +1258,12 @@
12431258 	list_del(&free_space_root->dirty_list);
12441259 
12451260 	btrfs_tree_lock(free_space_root->node);
1246
-	clean_tree_block(fs_info, free_space_root->node);
1261
+	btrfs_clean_tree_block(free_space_root->node);
12471262 	btrfs_tree_unlock(free_space_root->node);
12481263 	btrfs_free_tree_block(trans, free_space_root, free_space_root->node,
12491264 			      0, 1);
12501265 
1251
-	free_extent_buffer(free_space_root->node);
1252
-	free_extent_buffer(free_space_root->commit_root);
1253
-	kfree(free_space_root);
1266
+	btrfs_put_root(free_space_root);
12541267 
12551268 	return btrfs_commit_transaction(trans);
12561269 
....@@ -1261,7 +1274,7 @@
12611274 }
12621275 
12631276 static int __add_block_group_free_space(struct btrfs_trans_handle *trans,
1264
-					struct btrfs_block_group_cache *block_group,
1277
+					struct btrfs_block_group *block_group,
12651278 					struct btrfs_path *path)
12661279 {
12671280 	int ret;
....@@ -1273,12 +1286,12 @@
12731286 		return ret;
12741287 
12751288 	return __add_to_free_space_tree(trans, block_group, path,
1276
-					block_group->key.objectid,
1277
-					block_group->key.offset);
1289
+					block_group->start,
1290
+					block_group->length);
12781291 }
12791292 
12801293 int add_block_group_free_space(struct btrfs_trans_handle *trans,
1281
-			       struct btrfs_block_group_cache *block_group)
1294
+			       struct btrfs_block_group *block_group)
12821295 {
12831296 	struct btrfs_fs_info *fs_info = trans->fs_info;
12841297 	struct btrfs_path *path = NULL;
....@@ -1308,7 +1321,7 @@
13081321 }
13091322 
13101323 int remove_block_group_free_space(struct btrfs_trans_handle *trans,
1311
-				  struct btrfs_block_group_cache *block_group)
1324
+				  struct btrfs_block_group *block_group)
13121325 {
13131326 	struct btrfs_root *root = trans->fs_info->free_space_root;
13141327 	struct btrfs_path *path;
....@@ -1332,8 +1345,8 @@
13321345 		goto out;
13331346 	}
13341347 
1335
-	start = block_group->key.objectid;
1336
-	end = block_group->key.objectid + block_group->key.offset;
1348
+	start = block_group->start;
1349
+	end = block_group->start + block_group->length;
13371350 
13381351 	key.objectid = end - 1;
13391352 	key.type = (u8)-1;
....@@ -1351,8 +1364,8 @@
13511364 			btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0] - 1);
13521365 
13531366 			if (found_key.type == BTRFS_FREE_SPACE_INFO_KEY) {
1354
-				ASSERT(found_key.objectid == block_group->key.objectid);
1355
-				ASSERT(found_key.offset == block_group->key.offset);
1367
+				ASSERT(found_key.objectid == block_group->start);
1368
+				ASSERT(found_key.offset == block_group->length);
13561369 				done = 1;
13571370 				nr++;
13581371 				path->slots[0]--;
....@@ -1387,7 +1400,7 @@
13871400 				   struct btrfs_path *path,
13881401 				   u32 expected_extent_count)
13891402 {
1390
-	struct btrfs_block_group_cache *block_group;
1403
+	struct btrfs_block_group *block_group;
13911404 	struct btrfs_fs_info *fs_info;
13921405 	struct btrfs_root *root;
13931406 	struct btrfs_key key;
....@@ -1403,7 +1416,7 @@
14031416 	fs_info = block_group->fs_info;
14041417 	root = fs_info->free_space_root;
14051418 
1406
-	end = block_group->key.objectid + block_group->key.offset;
1419
+	end = block_group->start + block_group->length;
14071420 
14081421 	while (1) {
14091422 		ret = btrfs_next_item(root, path);
....@@ -1450,7 +1463,7 @@
14501463 	if (extent_count != expected_extent_count) {
14511464 		btrfs_err(fs_info,
14521465 			  "incorrect extent count for %llu; counted %u, expected %u",
1453
-			  block_group->key.objectid, extent_count,
1466
+			  block_group->start, extent_count,
14541467 			  expected_extent_count);
14551468 		ASSERT(0);
14561469 		ret = -EIO;
....@@ -1468,7 +1481,7 @@
14681481 				   struct btrfs_path *path,
14691482 				   u32 expected_extent_count)
14701483 {
1471
-	struct btrfs_block_group_cache *block_group;
1484
+	struct btrfs_block_group *block_group;
14721485 	struct btrfs_fs_info *fs_info;
14731486 	struct btrfs_root *root;
14741487 	struct btrfs_key key;
....@@ -1481,7 +1494,7 @@
14811494 	fs_info = block_group->fs_info;
14821495 	root = fs_info->free_space_root;
14831496 
1484
-	end = block_group->key.objectid + block_group->key.offset;
1497
+	end = block_group->start + block_group->length;
14851498 
14861499 	while (1) {
14871500 		ret = btrfs_next_item(root, path);
....@@ -1512,7 +1525,7 @@
15121525 	if (extent_count != expected_extent_count) {
15131526 		btrfs_err(fs_info,
15141527 			  "incorrect extent count for %llu; counted %u, expected %u",
1515
-			  block_group->key.objectid, extent_count,
1528
+			  block_group->start, extent_count,
15161529 			  expected_extent_count);
15171530 		ASSERT(0);
15181531 		ret = -EIO;
....@@ -1528,15 +1541,13 @@
15281541 
15291542 int load_free_space_tree(struct btrfs_caching_control *caching_ctl)
15301543 {
1531
-	struct btrfs_block_group_cache *block_group;
1532
-	struct btrfs_fs_info *fs_info;
1544
+	struct btrfs_block_group *block_group;
15331545 	struct btrfs_free_space_info *info;
15341546 	struct btrfs_path *path;
15351547 	u32 extent_count, flags;
15361548 	int ret;
15371549 
15381550 	block_group = caching_ctl->block_group;
1539
-	fs_info = block_group->fs_info;
15401551 
15411552 	path = btrfs_alloc_path();
15421553 	if (!path)
....@@ -1550,7 +1561,7 @@
15501561 	path->search_commit_root = 1;
15511562 	path->reada = READA_FORWARD;
15521563 
1553
-	info = search_free_space_info(NULL, fs_info, block_group, path, 0);
1564
+	info = search_free_space_info(NULL, block_group, path, 0);
15541565 	if (IS_ERR(info)) {
15551566 		ret = PTR_ERR(info);
15561567 		goto out;