mk-rootfs.sh

hc

2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376

 kernel/fs/btrfs/extent_map.h
..
..
@@ -9,15 +9,23 @@
9
9
 #define EXTENT_MAP_LAST_BYTE ((u64)-4)
10
10
 #define EXTENT_MAP_HOLE ((u64)-3)
11
11
 #define EXTENT_MAP_INLINE ((u64)-2)
12
+/* used only during fiemap calls */
12
13
 #define EXTENT_MAP_DELALLOC ((u64)-1)
13
14
 
14
-/* bits for the flags field */
15
-#define EXTENT_FLAG_PINNED 0 /* this entry not yet on disk, don't free it */
16
-#define EXTENT_FLAG_COMPRESSED 1
17
-#define EXTENT_FLAG_PREALLOC 3 /* pre-allocated extent */
18
-#define EXTENT_FLAG_LOGGING 4 /* Logging this extent */
19
-#define EXTENT_FLAG_FILLING 5 /* Filling in a preallocated extent */
20
-#define EXTENT_FLAG_FS_MAPPING 6 /* filesystem extent mapping type */
15
+/* bits for the extent_map::flags field */
16
+enum {
17
+	/* this entry not yet on disk, don't free it */
18
+	EXTENT_FLAG_PINNED,
19
+	EXTENT_FLAG_COMPRESSED,
20
+	/* pre-allocated extent */
21
+	EXTENT_FLAG_PREALLOC,
22
+	/* Logging this extent */
23
+	EXTENT_FLAG_LOGGING,
24
+	/* Filling in a preallocated extent */
25
+	EXTENT_FLAG_FILLING,
26
+	/* filesystem extent mapping type */
27
+	EXTENT_FLAG_FS_MAPPING,
28
+};
21
29
 
22
30
 struct extent_map {
23
31
 	struct rb_node rb_node;
..
..
@@ -34,22 +42,15 @@
34
42
 	u64 block_len;
35
43
 	u64 generation;
36
44
 	unsigned long flags;
37
-	union {
38
-		struct block_device *bdev;
39
-
40
-		/*
41
-		 * used for chunk mappings
42
-		 * flags & EXTENT_FLAG_FS_MAPPING must be set
43
-		 */
44
-		struct map_lookup *map_lookup;
45
-	};
45
+	/* Used for chunk mappings, flag EXTENT_FLAG_FS_MAPPING must be set */
46
+	struct map_lookup *map_lookup;
46
47
 	refcount_t refs;
47
48
 	unsigned int compress_type;
48
49
 	struct list_head list;
49
50
 };
50
51
 
51
52
 struct extent_map_tree {
52
-	struct rb_root map;
53
+	struct rb_root_cached map;
53
54
 	struct list_head modified_extents;
54
55
 	rwlock_t lock;
55
56
 };
..
..
@@ -78,7 +79,7 @@
78
79
 					 u64 start, u64 len);
79
80
 int add_extent_mapping(struct extent_map_tree *tree,
80
81
 		       struct extent_map *em, int modified);
81
-int remove_extent_mapping(struct extent_map_tree *tree, struct extent_map *em);
82
+void remove_extent_mapping(struct extent_map_tree *tree, struct extent_map *em);
82
83
 void replace_extent_mapping(struct extent_map_tree *tree,
83
84
 			    struct extent_map *cur,
84
85
 			    struct extent_map *new,