linux-ext4 - Re: [PATCH] ext4: Reserve FEATURE_RO

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Message-Id: <2B5199BA-39D5-4118-B4FC-96C8B800507B@dilger.ca>
Date:	Fri, 26 Apr 2013 05:47:58 -0600
From:	Andreas Dilger <adilger@...ger.ca>
To:	Lukas Czerner <lczerner@...hat.com>
Cc:	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
	Lukas Czerner <lczerner@...hat.com>
Subject: Re: [PATCH] ext4: Reserve FEATURE_RO_COMPAT and INO flag

I was looking in the maint and master branches, but I don't see these flags anywhere?

Cheers, Andreas

On 2013-04-25, at 8:39, Lukas Czerner <lczerner@...hat.com> wrote:

> EXT4_FEATURE_RO_COMPAT_REPLICA and EXT4_REPLICA_INO are reserved in
> e2fsprogs for non-upstream feature. However it has never been reserved
> in kernel, fix this. Thanks to Radek Pazdera to pointing it out.
> 
> Signed-off-by: Lukas Czerner <lczerner@...hat.com>
> ---
> fs/ext4/ext4.h |    3 +++
> 1 files changed, 3 insertions(+), 0 deletions(-)
> 
> diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
> index 3b83cd6..6369c28 100644
> --- a/fs/ext4/ext4.h
> +++ b/fs/ext4/ext4.h
> @@ -241,6 +241,7 @@ struct ext4_io_submit {
> #define EXT4_UNDEL_DIR_INO     6    /* Undelete directory inode */
> #define EXT4_RESIZE_INO         7    /* Reserved group descriptors inode */
> #define EXT4_JOURNAL_INO     8    /* Journal inode */
> +#define EXT4_REPLICA_INO     10    /* Used by non-upstream feature */
> 
> /* First non-reserved inode for old ext4 filesystems */
> #define EXT4_GOOD_OLD_FIRST_INO    11
> @@ -1481,6 +1482,8 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
>  * GDT_CSUM bits are mutually exclusive.
>  */
> #define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM    0x0400
> +/* Reserved for non-upstream feature */
> +#define EXT4_FEATURE_RO_COMPAT_REPLICA        0x0800
> 
> #define EXT4_FEATURE_INCOMPAT_COMPRESSION    0x0001
> #define EXT4_FEATURE_INCOMPAT_FILETYPE        0x0002
> -- 
> 1.7.7.6
> 
> --
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