linux-ext4 - Re: [PATCH] fs: apply umask if POSIX ACL support is disabled

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Date:   Tue, 3 Oct 2023 10:32:07 -0500
From:   Dave Kleikamp <dave.kleikamp@...cle.com>
To:     Max Kellermann <max.kellermann@...os.com>,
        Xiubo Li <xiubli@...hat.com>,
        Ilya Dryomov <idryomov@...il.com>,
        Jeff Layton <jlayton@...nel.org>, Jan Kara <jack@...e.com>
Cc:     ceph-devel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-ext4@...r.kernel.org, jfs-discussion@...ts.sourceforge.net
Subject: Re: [PATCH] fs: apply umask if POSIX ACL support is disabled

I think this is sane, but the patch needs a description of why this is 
necessary for these specific file systems.

Thanks,
Shaggy

On 9/19/23 3:18AM, Max Kellermann wrote:
> Signed-off-by: Max Kellermann <max.kellermann@...os.com>
> ---
>   fs/ceph/super.h           | 1 +
>   fs/ext2/acl.h             | 1 +
>   fs/jfs/jfs_acl.h          | 1 +
>   include/linux/posix_acl.h | 1 +
>   4 files changed, 4 insertions(+)
> 
> diff --git a/fs/ceph/super.h b/fs/ceph/super.h
> index 51c7f2b14f6f..e7e2f264acf4 100644
> --- a/fs/ceph/super.h
> +++ b/fs/ceph/super.h
> @@ -1194,6 +1194,7 @@ static inline void ceph_forget_all_cached_acls(struct inode *inode)
>   static inline int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
>   				     struct ceph_acl_sec_ctx *as_ctx)
>   {
> +	*mode &= ~current_umask();
>   	return 0;
>   }
>   static inline void ceph_init_inode_acls(struct inode *inode,
> diff --git a/fs/ext2/acl.h b/fs/ext2/acl.h
> index 4a8443a2b8ec..694af789c614 100644
> --- a/fs/ext2/acl.h
> +++ b/fs/ext2/acl.h
> @@ -67,6 +67,7 @@ extern int ext2_init_acl (struct inode *, struct inode *);
>   
>   static inline int ext2_init_acl (struct inode *inode, struct inode *dir)
>   {
> +	inode->i_mode &= ~current_umask();
>   	return 0;
>   }
>   #endif
> diff --git a/fs/jfs/jfs_acl.h b/fs/jfs/jfs_acl.h
> index f892e54d0fcd..10791e97a46f 100644
> --- a/fs/jfs/jfs_acl.h
> +++ b/fs/jfs/jfs_acl.h
> @@ -17,6 +17,7 @@ int jfs_init_acl(tid_t, struct inode *, struct inode *);
>   static inline int jfs_init_acl(tid_t tid, struct inode *inode,
>   			       struct inode *dir)
>   {
> +	inode->i_mode &= ~current_umask();
>   	return 0;
>   }
>   
> diff --git a/include/linux/posix_acl.h b/include/linux/posix_acl.h
> index 0e65b3d634d9..54bc9b1061ca 100644
> --- a/include/linux/posix_acl.h
> +++ b/include/linux/posix_acl.h
> @@ -128,6 +128,7 @@ static inline void cache_no_acl(struct inode *inode)
>   static inline int posix_acl_create(struct inode *inode, umode_t *mode,
>   		struct posix_acl **default_acl, struct posix_acl **acl)
>   {
> +	*mode &= ~current_umask();
>   	*default_acl = *acl = NULL;
>   	return 0;
>   }