if (!max_to_defrag)
max_to_defrag = last_index - 1;
- while (i <= last_index && defrag_count < max_to_defrag) {
+ /*
+ * make writeback starts from i, so the defrag range can be
+ * written sequentially.
+ */
+ if (i < inode->i_mapping->writeback_index)
+ inode->i_mapping->writeback_index = i;
+
+ while (i <= last_index && defrag_count < max_to_defrag &&
+ (i < (i_size_read(inode) + PAGE_CACHE_SIZE - 1) >>
+ PAGE_CACHE_SHIFT)) {
/*
* make sure we stop running if someone unmounts
* the FS
if (!(src_file->f_mode & FMODE_READ))
goto out_fput;
+ /* don't make the dst file partly checksummed */
+ if ((BTRFS_I(src)->flags & BTRFS_INODE_NODATASUM) !=
+ (BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM))
+ goto out_fput;
+
ret = -EISDIR;
if (S_ISDIR(src->i_mode) || S_ISDIR(inode->i_mode))
goto out_fput;
goto out_unlock;
}
+ /* truncate page cache pages from target inode range */
+ truncate_inode_pages_range(&inode->i_data, destoff,
+ PAGE_CACHE_ALIGN(destoff + len) - 1);
+
/* do any pending delalloc/csum calc on src, one way or
another, and lock file content */
while (1) {
btrfs_wait_ordered_range(src, off, len);
}
- /* truncate page cache pages from target inode range */
- truncate_inode_pages_range(&inode->i_data, off,
- ALIGN(off + len, PAGE_CACHE_SIZE) - 1);
-
/* clone data */
key.objectid = btrfs_ino(src);
key.type = BTRFS_EXTENT_DATA_KEY;
else
new_key.offset = destoff;
- trans = btrfs_start_transaction(root, 1);
+ /*
+ * 1 - adjusting old extent (we may have to split it)
+ * 1 - add new extent
+ * 1 - inode update
+ */
+ trans = btrfs_start_transaction(root, 3);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
goto out;
if (endoff > inode->i_size)
btrfs_i_size_write(inode, endoff);
- BTRFS_I(inode)->flags = BTRFS_I(src)->flags;
ret = btrfs_update_inode(trans, root, inode);
BUG_ON(ret);
btrfs_end_transaction(trans, root);