The function max_name_len_cde() in reiser4/plugin/item/cde40.c in my
opinion limits the file name length too strict.
One finds:
return
tree_by_inode(dir)->nplug->max_item_size() -
sizeof(directory_entry_format) - sizeof(cde_item_format) -
sizeof(cde_unit_header) - 2;
I think the -2 can be safely changed to -1 since the only extra byte
that has to be taken into account is the terminating zero of the file
name in case a longname key is encountered.
The maximum file name length in the original case is 3976 bytes if the
filesystem uses 4096 byte blocks. In this case the node header of the
node containing the cde40 item reports 1 byte of free space.
4096 block size
-28 sizeof(node40_header)
-38 sizeof(item_header40)
-2 sizeof(cde_item_format)
-26 sizeof(cde_unit_header)
-24 sizeof(directory_entry_format)
-1 terminating zero of file name
-1 ?
-----
3976
I changed the -2 to -1 and recompiled the kernel. Then I was able to
create a file with a 3977 byte name. In this case the node header
reports 0 bytes of free space.
Best regards, Peter.
