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Subject: Re: [PATCH 1/4] fs/ntfs3: In function ntfs_set_acl_ex do not change
 inode->i_mode if called from function ntfs_init_acl
From:   Joe Perches <joe@perches.com>
To:     Konstantin Komarov <almaz.alexandrovich@paragon-software.com>,
        ntfs3@lists.linux.dev
Cc:     linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Date:   Mon, 25 Oct 2021 10:13:03 -0700
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         <67d0c9ca-2531-8a8a-ea0b-270dc921e271@paragon-software.com>
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On Mon, 2021-10-25 at 19:58 +0300, Konstantin Komarov wrote:
> ntfs_init_acl sets mode. ntfs_init_acl calls ntfs_set_acl_ex.
> ntfs_set_acl_ex must not change this mode.
> Fixes xfstest generic/444
> Fixes: 83e8f5032e2d ("fs/ntfs3: Add attrib operations")

trivia:

> diff --git a/fs/ntfs3/xattr.c b/fs/ntfs3/xattr.c
[]
> @@ -538,7 +538,7 @@ struct posix_acl *ntfs_get_acl(struct inode *inode, int type)
>  
>  static noinline int ntfs_set_acl_ex(struct user_namespace *mnt_userns,
>  				    struct inode *inode, struct posix_acl *acl,
> -				    int type)
> +				    int type, int init_acl)

bool init_acl?

> @@ -613,7 +614,7 @@ static noinline int ntfs_set_acl_ex(struct user_namespace *mnt_userns,
>  int ntfs_set_acl(struct user_namespace *mnt_userns, struct inode *inode,
>  		 struct posix_acl *acl, int type)
>  {
> -	return ntfs_set_acl_ex(mnt_userns, inode, acl, type);
> +	return ntfs_set_acl_ex(mnt_userns, inode, acl, type, 0);

false

>  }
>  
>  /*
> @@ -633,7 +634,7 @@ int ntfs_init_acl(struct user_namespace *mnt_userns, struct inode *inode,
>  
>  	if (default_acl) {
>  		err = ntfs_set_acl_ex(mnt_userns, inode, default_acl,
> -				      ACL_TYPE_DEFAULT);
> +				      ACL_TYPE_DEFAULT, 1);

true, etc...