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Date:	Sun, 23 Nov 2008 23:15:35 +0100
From:	Andi Kleen <>
To:	Andreas Dilger <>
Cc:	Alexey Salmin <>,
	Theodore Tso <>,
Subject: Re: Maximum filename length

Andreas Dilger <> writes:
> #define EXT4_FT_ENTRY_3 0x80			/* file_type for dir_entry_3 */
> #define EXT4_FT_MASK    0x0f			/* EXT4_FT_* mask */
> #define EXT4_INODE_MASK 0x00ffffffffffffff	/* 48-bit inode number mask */
> #define EXT4_NAME_LEN3  1012
> struct ext4_dir_entry_3 {
> 	__le64 inode;		/* High byte holds file_type */
> 	__le16 rec_len;
> 	__le16 name_len;

The new format should also reserve space for a checksum. Adding that
would be actually a reasonable practical improvement for everyone.

> 	char   name[EXT4_NAME_LEN3];


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