struct btrfs_key_ptr ptrs[];
} __attribute__ ((__packed__));
+/* Read ahead values for struct btrfs_path.reada */
+enum {
+ READA_NONE,
+ READA_BACK,
+ READA_FORWARD,
+ /*
+ * Similar to READA_FORWARD but unlike it:
+ *
+ * 1) It will trigger readahead even for leaves that are not close to
+ * each other on disk;
+ * 2) It also triggers readahead for nodes;
+ * 3) During a search, even when a node or leaf is already in memory, it
+ * will still trigger readahead for other nodes and leaves that follow
+ * it.
+ *
+ * This is meant to be used only when we know we are iterating over the
+ * entire tree or a very large part of it.
+ */
+ READA_FORWARD_ALWAYS,
+};
+
/*
* btrfs_paths remember the path taken from the root down to the leaf.
* level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
* The slots array records the index of the item or block pointer
* used while walking the tree.
*/
-enum { READA_NONE, READA_BACK, READA_FORWARD };
struct btrfs_path {
struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
int slots[BTRFS_MAX_LEVEL];
atomic64_t discard_bytes_saved;
};
-/* delayed seq elem */
-struct seq_list {
- struct list_head list;
- u64 seq;
-};
-
-#define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
-
-#define SEQ_LAST ((u64)-1)
-
enum btrfs_orphan_cleanup_state {
ORPHAN_CLEANUP_STARTED = 1,
ORPHAN_CLEANUP_DONE = 2,
/* Indicate that we can't trust the free space tree for caching yet */
BTRFS_FS_FREE_SPACE_TREE_UNTRUSTED,
+
+ /* Indicate whether there are any tree modification log users */
+ BTRFS_FS_TREE_MOD_LOG_USERS,
+
+#if BITS_PER_LONG == 32
+ /* Indicate if we have error/warn message printed on 32bit systems */
+ BTRFS_FS_32BIT_ERROR,
+ BTRFS_FS_32BIT_WARN,
+#endif
};
/*
struct work_struct async_data_reclaim_work;
struct work_struct preempt_reclaim_work;
+ /* Reclaim partially filled block groups in the background */
+ struct work_struct reclaim_bgs_work;
+ struct list_head reclaim_bgs;
+ int bg_reclaim_threshold;
+
spinlock_t unused_bgs_lock;
struct list_head unused_bgs;
struct mutex unused_bg_unpin_mutex;
- struct mutex delete_unused_bgs_mutex;
+ /* Protect block groups that are going to be deleted */
+ struct mutex reclaim_bgs_lock;
/* Cached block sizes */
u32 nodesize;
int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
struct btrfs_ref *generic_ref);
-int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
/*
clear_bit(BTRFS_FS_STATE_RO, &btrfs_sb(sb)->fs_state);
}
-/* tree mod log functions from ctree.c */
-u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
- struct seq_list *elem);
-void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
- struct seq_list *elem);
-int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
-
/* root-item.c */
int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
u64 ref_id, u64 dirid, u64 sequence, const char *name,
blk_status_t btrfs_submit_data_bio(struct inode *inode, struct bio *bio,
int mirror_num, unsigned long bio_flags);
int btrfs_verify_data_csum(struct btrfs_io_bio *io_bio, u32 bio_offset,
- struct page *page, u64 start, u64 end, int mirror);
+ struct page *page, u64 start, u64 end);
struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
u64 start, u64 len);
noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
/* Inode locking type flags, by default the exclusive lock is taken */
#define BTRFS_ILOCK_SHARED (1U << 0)
#define BTRFS_ILOCK_TRY (1U << 1)
+#define BTRFS_ILOCK_MMAP (1U << 2)
int btrfs_inode_lock(struct inode *inode, unsigned int ilock_flags);
void btrfs_inode_unlock(struct inode *inode, unsigned int ilock_flags);
int btrfs_drop_extents(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct btrfs_inode *inode,
struct btrfs_drop_extents_args *args);
-int btrfs_replace_file_extents(struct inode *inode, struct btrfs_path *path,
- const u64 start, const u64 end,
+int btrfs_replace_file_extents(struct btrfs_inode *inode,
+ struct btrfs_path *path, const u64 start,
+ const u64 end,
struct btrfs_replace_extent_info *extent_info,
struct btrfs_trans_handle **trans_out);
int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
#define ASSERT(expr) (void)(expr)
#endif
+#if BITS_PER_LONG == 32
+#define BTRFS_32BIT_MAX_FILE_SIZE (((u64)ULONG_MAX + 1) << PAGE_SHIFT)
+/*
+ * The warning threshold is 5/8th of the MAX_LFS_FILESIZE that limits the logical
+ * addresses of extents.
+ *
+ * For 4K page size it's about 10T, for 64K it's 160T.
+ */
+#define BTRFS_32BIT_EARLY_WARN_THRESHOLD (BTRFS_32BIT_MAX_FILE_SIZE * 5 / 8)
+void btrfs_warn_32bit_limit(struct btrfs_fs_info *fs_info);
+void btrfs_err_32bit_limit(struct btrfs_fs_info *fs_info);
+#endif
+
/*
* Get the correct offset inside the page of extent buffer.
*
return signal_pending(current);
}
-#define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
-
/* Sanity test specific functions */
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
void btrfs_test_destroy_inode(struct inode *inode);
projects / linux-2.6-microblaze.git / blobdiff