Thank you for your quick review. On 2020/08/27 12:19, Namjae Jeon wrote:
+ i = ES_INDEX_NAME; + while ((ep = exfat_get_validated_dentry(es, i++, TYPE_NAME))) {Please find the way to access name entries like ep_file, ep_stream without calling exfat_get_validated_dentry().
Hmm, it's a hard order. I can't separate length/type validation and extraction. Sorry, I have no good idea.
@@ -590,17 +587,16 @@ int exfat_remove_entries(struct inode *inode, struct exfat_chain *p_dir, void exfat_update_dir_chksum_with_entry_set(struct exfat_entry_set_cache *es) { int chksum_type = CS_DIR_ENTRY, i; - unsigned short chksum = 0; + u16 chksum = 0; struct exfat_dentry *ep; for (i = 0; i < es->num_entries; i++) { - ep = exfat_get_dentry_cached(es, i); + ep = exfat_get_validated_dentry(es, i, TYPE_ALL);Ditto, You do not need to repeatedly call exfat_get_validated_dentry() for the entries which got from exfat_get_dentry_set().
Even if I could do that, it would be very difficult to implement a checksum patch. It is also difficult to use for rename, move, delete. (these also have no verification of neme-length and set-checksum)
/* validiate cached dentries */ - for (i = 1; i < num_entries; i++) { - ep = exfat_get_dentry_cached(es, i); - if (!exfat_validate_entry(exfat_get_entry_type(ep), &mode)) - goto free_es; + es->ep_stream = exfat_get_validated_dentry(es, ES_INDEX_STREAM, TYPE_STREAM); + if (!es->ep_stream) + goto free_es; + + if (max_entries == ES_ALL_ENTRIES) { + for (i = 0; i < ES_FILE(es).num_ext; i++) + if (!exfat_get_validated_dentry(es, ES_INDEX_STREAM + i, TYPE_SECONDARY)) + goto free_es; + for (i = 0; i * EXFAT_FILE_NAME_LEN < ES_STREAM(es).name_len; i++) + if (!exfat_get_validated_dentry(es, ES_INDEX_NAME + i, TYPE_NAME)) + goto free_es;Why do you unnecessarily check entries with two loops? Please refer to the patch I sent.
This order is possible. However, TYPE_SECONDARY loop will be back as checksum loop. In the next patch, I can fix the 'TYPE_SECONDARY loop' order. do you need it? BR --- Tetsuhiro Kohada <kohada.t2@xxxxxxxxx>
