linux-ext4 - Re: [PATCH] ext4: don't hardcode bit values in EXT4_FL_USER

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 5 Aug 2020 16:25:01 +0200
From:   Jan Kara <jack@...e.cz>
To:     Eric Biggers <ebiggers@...nel.org>
Cc:     linux-ext4@...r.kernel.org
Subject: Re: [PATCH] ext4: don't hardcode bit values in EXT4_FL_USER_*

On Sun 12-07-20 20:10:12, Eric Biggers wrote:
> From: Eric Biggers <ebiggers@...gle.com>
> 
> Define the EXT4_FL_USER_* constants by OR-ing together the appropriate
> flags, rather than hard-coding a numeric value.  This makes it much
> easier to see which flags are listed.
> 
> No change in the actual values.
> 
> Signed-off-by: Eric Biggers <ebiggers@...gle.com>

The patch looks good to me. You can add:

Reviewed-by: Jan Kara <jack@...e.cz>

								Honza


> ---
>  fs/ext4/ext4.h | 30 ++++++++++++++++++++++++++++--
>  1 file changed, 28 insertions(+), 2 deletions(-)
> 
> diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
> index 42f5060f3cdf..b603a28a3696 100644
> --- a/fs/ext4/ext4.h
> +++ b/fs/ext4/ext4.h
> @@ -434,8 +434,34 @@ struct flex_groups {
>  #define EXT4_CASEFOLD_FL		0x40000000 /* Casefolded directory */
>  #define EXT4_RESERVED_FL		0x80000000 /* reserved for ext4 lib */
>  
> -#define EXT4_FL_USER_VISIBLE		0x725BDFFF /* User visible flags */
> -#define EXT4_FL_USER_MODIFIABLE		0x624BC0FF /* User modifiable flags */
> +/* User modifiable flags */
> +#define EXT4_FL_USER_MODIFIABLE		(EXT4_SECRM_FL | \
> +					 EXT4_UNRM_FL | \
> +					 EXT4_COMPR_FL | \
> +					 EXT4_SYNC_FL | \
> +					 EXT4_IMMUTABLE_FL | \
> +					 EXT4_APPEND_FL | \
> +					 EXT4_NODUMP_FL | \
> +					 EXT4_NOATIME_FL | \
> +					 EXT4_JOURNAL_DATA_FL | \
> +					 EXT4_NOTAIL_FL | \
> +					 EXT4_DIRSYNC_FL | \
> +					 EXT4_TOPDIR_FL | \
> +					 EXT4_EXTENTS_FL | \
> +					 0x00400000 /* EXT4_EOFBLOCKS_FL */ | \
> +					 EXT4_DAX_FL | \
> +					 EXT4_PROJINHERIT_FL | \
> +					 EXT4_CASEFOLD_FL)
> +
> +/* User visible flags */
> +#define EXT4_FL_USER_VISIBLE		(EXT4_FL_USER_MODIFIABLE | \
> +					 EXT4_DIRTY_FL | \
> +					 EXT4_COMPRBLK_FL | \
> +					 EXT4_NOCOMPR_FL | \
> +					 EXT4_ENCRYPT_FL | \
> +					 EXT4_INDEX_FL | \
> +					 EXT4_VERITY_FL | \
> +					 EXT4_INLINE_DATA_FL)
>  
>  /* Flags we can manipulate with through EXT4_IOC_FSSETXATTR */
>  #define EXT4_FL_XFLAG_VISIBLE		(EXT4_SYNC_FL | \
> -- 
> 2.27.0
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR