From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/fs/btrfs/extent_map.h | 37 +++++++++++++++++++------------------
1 files changed, 19 insertions(+), 18 deletions(-)
diff --git a/kernel/fs/btrfs/extent_map.h b/kernel/fs/btrfs/extent_map.h
index 25d985e..8e21733 100644
--- a/kernel/fs/btrfs/extent_map.h
+++ b/kernel/fs/btrfs/extent_map.h
@@ -9,15 +9,23 @@
#define EXTENT_MAP_LAST_BYTE ((u64)-4)
#define EXTENT_MAP_HOLE ((u64)-3)
#define EXTENT_MAP_INLINE ((u64)-2)
+/* used only during fiemap calls */
#define EXTENT_MAP_DELALLOC ((u64)-1)
-/* bits for the flags field */
-#define EXTENT_FLAG_PINNED 0 /* this entry not yet on disk, don't free it */
-#define EXTENT_FLAG_COMPRESSED 1
-#define EXTENT_FLAG_PREALLOC 3 /* pre-allocated extent */
-#define EXTENT_FLAG_LOGGING 4 /* Logging this extent */
-#define EXTENT_FLAG_FILLING 5 /* Filling in a preallocated extent */
-#define EXTENT_FLAG_FS_MAPPING 6 /* filesystem extent mapping type */
+/* bits for the extent_map::flags field */
+enum {
+ /* this entry not yet on disk, don't free it */
+ EXTENT_FLAG_PINNED,
+ EXTENT_FLAG_COMPRESSED,
+ /* pre-allocated extent */
+ EXTENT_FLAG_PREALLOC,
+ /* Logging this extent */
+ EXTENT_FLAG_LOGGING,
+ /* Filling in a preallocated extent */
+ EXTENT_FLAG_FILLING,
+ /* filesystem extent mapping type */
+ EXTENT_FLAG_FS_MAPPING,
+};
struct extent_map {
struct rb_node rb_node;
@@ -34,22 +42,15 @@
u64 block_len;
u64 generation;
unsigned long flags;
- union {
- struct block_device *bdev;
-
- /*
- * used for chunk mappings
- * flags & EXTENT_FLAG_FS_MAPPING must be set
- */
- struct map_lookup *map_lookup;
- };
+ /* Used for chunk mappings, flag EXTENT_FLAG_FS_MAPPING must be set */
+ struct map_lookup *map_lookup;
refcount_t refs;
unsigned int compress_type;
struct list_head list;
};
struct extent_map_tree {
- struct rb_root map;
+ struct rb_root_cached map;
struct list_head modified_extents;
rwlock_t lock;
};
@@ -78,7 +79,7 @@
u64 start, u64 len);
int add_extent_mapping(struct extent_map_tree *tree,
struct extent_map *em, int modified);
-int remove_extent_mapping(struct extent_map_tree *tree, struct extent_map *em);
+void remove_extent_mapping(struct extent_map_tree *tree, struct extent_map *em);
void replace_extent_mapping(struct extent_map_tree *tree,
struct extent_map *cur,
struct extent_map *new,
--
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