Contributors: 12
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Chris Mason |
276 |
62.87% |
9 |
28.12% |
| Josef Bacik |
47 |
10.71% |
7 |
21.88% |
| Filipe David Borba Manana |
45 |
10.25% |
2 |
6.25% |
| Liu Bo |
27 |
6.15% |
2 |
6.25% |
| Jeff Mahoney |
10 |
2.28% |
1 |
3.12% |
| David Sterba |
9 |
2.05% |
4 |
12.50% |
| Zheng Yan |
8 |
1.82% |
2 |
6.25% |
| Shilong Wang |
5 |
1.14% |
1 |
3.12% |
| Elena Reshetova |
4 |
0.91% |
1 |
3.12% |
| Dulshani Gunawardhana |
4 |
0.91% |
1 |
3.12% |
| Li Zefan |
3 |
0.68% |
1 |
3.12% |
| Greg Kroah-Hartman |
1 |
0.23% |
1 |
3.12% |
| Total |
439 |
|
32 |
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef BTRFS_EXTENT_MAP_H
#define BTRFS_EXTENT_MAP_H
#include <linux/rbtree.h>
#include <linux/refcount.h>
#define EXTENT_MAP_LAST_BYTE ((u64)-4)
#define EXTENT_MAP_HOLE ((u64)-3)
#define EXTENT_MAP_INLINE ((u64)-2)
#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 */
struct extent_map {
struct rb_node rb_node;
/* all of these are in bytes */
u64 start;
u64 len;
u64 mod_start;
u64 mod_len;
u64 orig_start;
u64 orig_block_len;
u64 ram_bytes;
u64 block_start;
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;
};
refcount_t refs;
unsigned int compress_type;
struct list_head list;
};
struct extent_map_tree {
struct rb_root map;
struct list_head modified_extents;
rwlock_t lock;
};
static inline int extent_map_in_tree(const struct extent_map *em)
{
return !RB_EMPTY_NODE(&em->rb_node);
}
static inline u64 extent_map_end(struct extent_map *em)
{
if (em->start + em->len < em->start)
return (u64)-1;
return em->start + em->len;
}
static inline u64 extent_map_block_end(struct extent_map *em)
{
if (em->block_start + em->block_len < em->block_start)
return (u64)-1;
return em->block_start + em->block_len;
}
void extent_map_tree_init(struct extent_map_tree *tree);
struct extent_map *lookup_extent_mapping(struct extent_map_tree *tree,
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 replace_extent_mapping(struct extent_map_tree *tree,
struct extent_map *cur,
struct extent_map *new,
int modified);
struct extent_map *alloc_extent_map(void);
void free_extent_map(struct extent_map *em);
int __init extent_map_init(void);
void __cold extent_map_exit(void);
int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len, u64 gen);
void clear_em_logging(struct extent_map_tree *tree, struct extent_map *em);
struct extent_map *search_extent_mapping(struct extent_map_tree *tree,
u64 start, u64 len);
int btrfs_add_extent_mapping(struct btrfs_fs_info *fs_info,
struct extent_map_tree *em_tree,
struct extent_map **em_in, u64 start, u64 len);
#endif