zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/fs/btrfs/extent_io.h b/ap/os/linux/linux-3.4.x/fs/btrfs/extent_io.h
new file mode 100644
index 0000000..2edf912
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/fs/btrfs/extent_io.h
@@ -0,0 +1,333 @@
+#ifndef __EXTENTIO__
+#define __EXTENTIO__
+
+#include <linux/rbtree.h>
+
+/* bits for the extent state */
+#define EXTENT_DIRTY 1
+#define EXTENT_WRITEBACK (1 << 1)
+#define EXTENT_UPTODATE (1 << 2)
+#define EXTENT_LOCKED (1 << 3)
+#define EXTENT_NEW (1 << 4)
+#define EXTENT_DELALLOC (1 << 5)
+#define EXTENT_DEFRAG (1 << 6)
+#define EXTENT_DEFRAG_DONE (1 << 7)
+#define EXTENT_BUFFER_FILLED (1 << 8)
+#define EXTENT_BOUNDARY (1 << 9)
+#define EXTENT_NODATASUM (1 << 10)
+#define EXTENT_DO_ACCOUNTING (1 << 11)
+#define EXTENT_FIRST_DELALLOC (1 << 12)
+#define EXTENT_NEED_WAIT (1 << 13)
+#define EXTENT_DAMAGED (1 << 14)
+#define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK)
+#define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING | EXTENT_FIRST_DELALLOC)
+
+/*
+ * flags for bio submission. The high bits indicate the compression
+ * type for this bio
+ */
+#define EXTENT_BIO_COMPRESSED 1
+#define EXTENT_BIO_FLAG_SHIFT 16
+
+/* these are bit numbers for test/set bit */
+#define EXTENT_BUFFER_UPTODATE 0
+#define EXTENT_BUFFER_BLOCKING 1
+#define EXTENT_BUFFER_DIRTY 2
+#define EXTENT_BUFFER_CORRUPT 3
+#define EXTENT_BUFFER_READAHEAD 4 /* this got triggered by readahead */
+#define EXTENT_BUFFER_TREE_REF 5
+#define EXTENT_BUFFER_STALE 6
+#define EXTENT_BUFFER_WRITEBACK 7
+#define EXTENT_BUFFER_IOERR 8
+
+/* these are flags for extent_clear_unlock_delalloc */
+#define EXTENT_CLEAR_UNLOCK_PAGE 0x1
+#define EXTENT_CLEAR_UNLOCK 0x2
+#define EXTENT_CLEAR_DELALLOC 0x4
+#define EXTENT_CLEAR_DIRTY 0x8
+#define EXTENT_SET_WRITEBACK 0x10
+#define EXTENT_END_WRITEBACK 0x20
+#define EXTENT_SET_PRIVATE2 0x40
+#define EXTENT_CLEAR_ACCOUNTING 0x80
+
+/*
+ * page->private values. Every page that is controlled by the extent
+ * map has page->private set to one.
+ */
+#define EXTENT_PAGE_PRIVATE 1
+#define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3
+
+struct extent_state;
+struct btrfs_root;
+
+typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw,
+ struct bio *bio, int mirror_num,
+ unsigned long bio_flags, u64 bio_offset);
+struct extent_io_ops {
+ int (*fill_delalloc)(struct inode *inode, struct page *locked_page,
+ u64 start, u64 end, int *page_started,
+ unsigned long *nr_written);
+ int (*writepage_start_hook)(struct page *page, u64 start, u64 end);
+ int (*writepage_io_hook)(struct page *page, u64 start, u64 end);
+ extent_submit_bio_hook_t *submit_bio_hook;
+ int (*merge_bio_hook)(struct page *page, unsigned long offset,
+ size_t size, struct bio *bio,
+ unsigned long bio_flags);
+ int (*readpage_io_hook)(struct page *page, u64 start, u64 end);
+ int (*readpage_io_failed_hook)(struct page *page, int failed_mirror);
+ int (*writepage_io_failed_hook)(struct bio *bio, struct page *page,
+ u64 start, u64 end,
+ struct extent_state *state);
+ int (*readpage_end_io_hook)(struct page *page, u64 start, u64 end,
+ struct extent_state *state, int mirror);
+ int (*writepage_end_io_hook)(struct page *page, u64 start, u64 end,
+ struct extent_state *state, int uptodate);
+ void (*set_bit_hook)(struct inode *inode, struct extent_state *state,
+ int *bits);
+ void (*clear_bit_hook)(struct inode *inode, struct extent_state *state,
+ int *bits);
+ void (*merge_extent_hook)(struct inode *inode,
+ struct extent_state *new,
+ struct extent_state *other);
+ void (*split_extent_hook)(struct inode *inode,
+ struct extent_state *orig, u64 split);
+ int (*write_cache_pages_lock_hook)(struct page *page, void *data,
+ void (*flush_fn)(void *));
+};
+
+struct extent_io_tree {
+ struct rb_root state;
+ struct radix_tree_root buffer;
+ struct address_space *mapping;
+ u64 dirty_bytes;
+ int track_uptodate;
+ spinlock_t lock;
+ spinlock_t buffer_lock;
+ struct extent_io_ops *ops;
+};
+
+struct extent_state {
+ u64 start;
+ u64 end; /* inclusive */
+ struct rb_node rb_node;
+
+ /* ADD NEW ELEMENTS AFTER THIS */
+ struct extent_io_tree *tree;
+ wait_queue_head_t wq;
+ atomic_t refs;
+ unsigned long state;
+
+ /* for use by the FS */
+ u64 private;
+
+ struct list_head leak_list;
+};
+
+#define INLINE_EXTENT_BUFFER_PAGES 16
+#define MAX_INLINE_EXTENT_BUFFER_SIZE (INLINE_EXTENT_BUFFER_PAGES * PAGE_CACHE_SIZE)
+struct extent_buffer {
+ u64 start;
+ unsigned long len;
+ unsigned long map_start;
+ unsigned long map_len;
+ unsigned long bflags;
+ struct extent_io_tree *tree;
+ spinlock_t refs_lock;
+ atomic_t refs;
+ atomic_t io_pages;
+ int read_mirror;
+ struct list_head leak_list;
+ struct rcu_head rcu_head;
+ pid_t lock_owner;
+
+ /* count of read lock holders on the extent buffer */
+ atomic_t write_locks;
+ atomic_t read_locks;
+ atomic_t blocking_writers;
+ atomic_t blocking_readers;
+ atomic_t spinning_readers;
+ atomic_t spinning_writers;
+ int lock_nested;
+
+ /* protects write locks */
+ rwlock_t lock;
+
+ /* readers use lock_wq while they wait for the write
+ * lock holders to unlock
+ */
+ wait_queue_head_t write_lock_wq;
+
+ /* writers use read_lock_wq while they wait for readers
+ * to unlock
+ */
+ wait_queue_head_t read_lock_wq;
+ wait_queue_head_t lock_wq;
+ struct page *inline_pages[INLINE_EXTENT_BUFFER_PAGES];
+ struct page **pages;
+};
+
+static inline void extent_set_compress_type(unsigned long *bio_flags,
+ int compress_type)
+{
+ *bio_flags |= compress_type << EXTENT_BIO_FLAG_SHIFT;
+}
+
+static inline int extent_compress_type(unsigned long bio_flags)
+{
+ return bio_flags >> EXTENT_BIO_FLAG_SHIFT;
+}
+
+struct extent_map_tree;
+
+typedef struct extent_map *(get_extent_t)(struct inode *inode,
+ struct page *page,
+ size_t pg_offset,
+ u64 start, u64 len,
+ int create);
+
+void extent_io_tree_init(struct extent_io_tree *tree,
+ struct address_space *mapping);
+int try_release_extent_mapping(struct extent_map_tree *map,
+ struct extent_io_tree *tree, struct page *page,
+ gfp_t mask);
+int try_release_extent_buffer(struct page *page, gfp_t mask);
+int try_release_extent_state(struct extent_map_tree *map,
+ struct extent_io_tree *tree, struct page *page,
+ gfp_t mask);
+int lock_extent(struct extent_io_tree *tree, u64 start, u64 end);
+int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
+ int bits, struct extent_state **cached);
+int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end);
+int unlock_extent_cached(struct extent_io_tree *tree, u64 start, u64 end,
+ struct extent_state **cached, gfp_t mask);
+int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end);
+int extent_read_full_page(struct extent_io_tree *tree, struct page *page,
+ get_extent_t *get_extent, int mirror_num);
+int __init extent_io_init(void);
+void extent_io_exit(void);
+
+u64 count_range_bits(struct extent_io_tree *tree,
+ u64 *start, u64 search_end,
+ u64 max_bytes, unsigned long bits, int contig);
+
+void free_extent_state(struct extent_state *state);
+int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
+ int bits, int filled, struct extent_state *cached_state);
+int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
+ int bits, gfp_t mask);
+int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
+ int bits, int wake, int delete, struct extent_state **cached,
+ gfp_t mask);
+int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
+ int bits, gfp_t mask);
+int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
+ int bits, u64 *failed_start,
+ struct extent_state **cached_state, gfp_t mask);
+int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end,
+ struct extent_state **cached_state, gfp_t mask);
+int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end,
+ gfp_t mask);
+int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
+ gfp_t mask);
+int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
+ gfp_t mask);
+int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
+ int bits, int clear_bits, gfp_t mask);
+int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end,
+ struct extent_state **cached_state, gfp_t mask);
+int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
+ u64 *start_ret, u64 *end_ret, int bits);
+struct extent_state *find_first_extent_bit_state(struct extent_io_tree *tree,
+ u64 start, int bits);
+int extent_invalidatepage(struct extent_io_tree *tree,
+ struct page *page, unsigned long offset);
+int extent_write_full_page(struct extent_io_tree *tree, struct page *page,
+ get_extent_t *get_extent,
+ struct writeback_control *wbc);
+int extent_write_locked_range(struct extent_io_tree *tree, struct inode *inode,
+ u64 start, u64 end, get_extent_t *get_extent,
+ int mode);
+int extent_writepages(struct extent_io_tree *tree,
+ struct address_space *mapping,
+ get_extent_t *get_extent,
+ struct writeback_control *wbc);
+int btree_write_cache_pages(struct address_space *mapping,
+ struct writeback_control *wbc);
+int extent_readpages(struct extent_io_tree *tree,
+ struct address_space *mapping,
+ struct list_head *pages, unsigned nr_pages,
+ get_extent_t get_extent);
+int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
+ __u64 start, __u64 len, get_extent_t *get_extent);
+int set_state_private(struct extent_io_tree *tree, u64 start, u64 private);
+int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private);
+void set_page_extent_mapped(struct page *page);
+
+struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree,
+ u64 start, unsigned long len);
+struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree,
+ u64 start, unsigned long len);
+void free_extent_buffer(struct extent_buffer *eb);
+void free_extent_buffer_stale(struct extent_buffer *eb);
+#define WAIT_NONE 0
+#define WAIT_COMPLETE 1
+#define WAIT_PAGE_LOCK 2
+int read_extent_buffer_pages(struct extent_io_tree *tree,
+ struct extent_buffer *eb, u64 start, int wait,
+ get_extent_t *get_extent, int mirror_num);
+unsigned long num_extent_pages(u64 start, u64 len);
+struct page *extent_buffer_page(struct extent_buffer *eb, unsigned long i);
+
+static inline void extent_buffer_get(struct extent_buffer *eb)
+{
+ atomic_inc(&eb->refs);
+}
+
+int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv,
+ unsigned long start,
+ unsigned long len);
+void read_extent_buffer(struct extent_buffer *eb, void *dst,
+ unsigned long start,
+ unsigned long len);
+void write_extent_buffer(struct extent_buffer *eb, const void *src,
+ unsigned long start, unsigned long len);
+void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src,
+ unsigned long dst_offset, unsigned long src_offset,
+ unsigned long len);
+void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
+ unsigned long src_offset, unsigned long len);
+void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
+ unsigned long src_offset, unsigned long len);
+void memset_extent_buffer(struct extent_buffer *eb, char c,
+ unsigned long start, unsigned long len);
+void wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits);
+void clear_extent_buffer_dirty(struct extent_buffer *eb);
+int set_extent_buffer_dirty(struct extent_buffer *eb);
+int set_extent_buffer_uptodate(struct extent_buffer *eb);
+int clear_extent_buffer_uptodate(struct extent_buffer *eb);
+int extent_buffer_uptodate(struct extent_buffer *eb);
+int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset,
+ unsigned long min_len, char **map,
+ unsigned long *map_start,
+ unsigned long *map_len);
+int extent_range_uptodate(struct extent_io_tree *tree,
+ u64 start, u64 end);
+int extent_range_clear_dirty_for_io(struct inode *inode, u64 start, u64 end);
+int extent_range_redirty_for_io(struct inode *inode, u64 start, u64 end);
+int extent_clear_unlock_delalloc(struct inode *inode,
+ struct extent_io_tree *tree,
+ u64 start, u64 end, struct page *locked_page,
+ unsigned long op);
+struct bio *
+btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs,
+ gfp_t gfp_flags);
+
+struct btrfs_mapping_tree;
+
+int repair_io_failure(struct btrfs_mapping_tree *map_tree, u64 start,
+ u64 length, u64 logical, struct page *page,
+ int mirror_num);
+int end_extent_writepage(struct page *page, int err, u64 start, u64 end);
+int repair_eb_io_failure(struct btrfs_root *root, struct extent_buffer *eb,
+ int mirror_num);
+#endif