linux-ext4 - Re: Maximum filename length

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Message-ID: <87abbqhywo.fsf@basil.nowhere.org>
Date:	Sun, 23 Nov 2008 23:15:35 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Andreas Dilger <adilger@....com>
Cc:	Alexey Salmin <alexey.salmin@...il.com>,
	Theodore Tso <tytso@....edu>, linux-ext4@...r.kernel.org
Subject: Re: Maximum filename length

Andreas Dilger <adilger@....com> 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];

-Andi

-- 
ak@...ux.intel.com
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