btrfs: make find_desired_extent take btrfs_inode

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/file.c

@@ -3495,13 +3495,13 @@ static long btrfs_fallocate(struct file *file, int mode,
 	return ret;
 }
 
-static loff_t find_desired_extent(struct inode *inode, loff_t offset,
+static loff_t find_desired_extent(struct btrfs_inode *inode, loff_t offset,
 				  int whence)
 {
-	struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
+	struct btrfs_fs_info *fs_info = inode->root->fs_info;
 	struct extent_map *em = NULL;
 	struct extent_state *cached_state = NULL;
-	loff_t i_size = inode->i_size;
+	loff_t i_size = inode->vfs_inode.i_size;
 	u64 lockstart;
 	u64 lockend;
 	u64 start;
@@ -3524,11 +3524,10 @@ static loff_t find_desired_extent(struct inode *inode, loff_t offset,
 	lockend--;
 	len = lockend - lockstart + 1;
 
-	lock_extent_bits(&BTRFS_I(inode)->io_tree, lockstart, lockend,
-			 &cached_state);
+	lock_extent_bits(&inode->io_tree, lockstart, lockend, &cached_state);
 
 	while (start < i_size) {
-		em = btrfs_get_extent_fiemap(BTRFS_I(inode), start, len);
+		em = btrfs_get_extent_fiemap(inode, start, len);
 		if (IS_ERR(em)) {
 			ret = PTR_ERR(em);
 			em = NULL;
@@ -3550,7 +3549,7 @@ static loff_t find_desired_extent(struct inode *inode, loff_t offset,
 		cond_resched();
 	}
 	free_extent_map(em);
-	unlock_extent_cached(&BTRFS_I(inode)->io_tree, lockstart, lockend,
+	unlock_extent_cached(&inode->io_tree, lockstart, lockend,
 			     &cached_state);
 	if (ret) {
 		offset = ret;
@@ -3574,7 +3573,7 @@ static loff_t btrfs_file_llseek(struct file *file, loff_t offset, int whence)
 	case SEEK_DATA:
 	case SEEK_HOLE:
 		btrfs_inode_lock(inode, BTRFS_ILOCK_SHARED);
-		offset = find_desired_extent(inode, offset, whence);
+		offset = find_desired_extent(BTRFS_I(inode), offset, whence);
 		btrfs_inode_unlock(inode, BTRFS_ILOCK_SHARED);
 		break;
 	}