Btrfs: improve the performance of the csums lookup

[deliverable/linux.git] / fs / btrfs / ordered-data.h

diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h
index f29d4bf5fbe70dee3990874be8d9975c937f3477..58b0e3b0ebadb633b22916f3a50015c64c24a109 100644 (file)
--- a/fs/btrfs/ordered-data.h
+++ b/fs/btrfs/ordered-data.h
@@ -79,6 +79,8 @@ struct btrfs_ordered_sum {
 #define BTRFS_ORDERED_UPDATED_ISIZE 7 /* indicates whether this ordered extent
                                       * has done its due diligence in updating
                                       * the isize. */
+#define BTRFS_ORDERED_LOGGED_CSUM 8 /* We've logged the csums on this ordered
+                                      ordered extent */
 
 struct btrfs_ordered_extent {
        /* logical offset in the file */
@@ -96,6 +98,9 @@ struct btrfs_ordered_extent {
        /* number of bytes that still need writing */
        u64 bytes_left;
 
+       /* number of bytes that still need csumming */
+       u64 csum_bytes_left;
+
        /*
         * the end of the ordered extent which is behind it but
         * didn't update disk_i_size. Please see the comment of
@@ -118,6 +123,9 @@ struct btrfs_ordered_extent {
        /* list of checksums for insertion when the extent io is done */
        struct list_head list;
 
+       /* If we need to wait on this to be done */
+       struct list_head log_list;
+
        /* used to wait for the BTRFS_ORDERED_COMPLETE bit */
        wait_queue_head_t wait;
 
@@ -188,12 +196,17 @@ struct btrfs_ordered_extent *btrfs_lookup_ordered_range(struct inode *inode,
                                                        u64 len);
 int btrfs_ordered_update_i_size(struct inode *inode, u64 offset,
                                struct btrfs_ordered_extent *ordered);
-int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr, u32 *sum);
-int btrfs_run_ordered_operations(struct btrfs_root *root, int wait);
+int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr,
+                          u32 *sum, int len);
+int btrfs_run_ordered_operations(struct btrfs_trans_handle *trans,
+                                struct btrfs_root *root, int wait);
 void btrfs_add_ordered_operation(struct btrfs_trans_handle *trans,
                                 struct btrfs_root *root,
                                 struct inode *inode);
 void btrfs_wait_ordered_extents(struct btrfs_root *root, int delay_iput);
+void btrfs_get_logged_extents(struct btrfs_root *log, struct inode *inode);
+void btrfs_wait_logged_extents(struct btrfs_root *log, u64 transid);
+void btrfs_free_logged_extents(struct btrfs_root *log, u64 transid);
 int __init ordered_data_init(void);
 void ordered_data_exit(void);
 #endif