On Tue, Oct 26, 2021 at 07:41:27PM +0300, Konstantin Komarov wrote:
> Apparently we need to maintain these functions with
> ntfs_get_acl_ex and ntfs_set_acl_ex.
> This commit fixes xfstest generic/099
I like how you phrase this in one other patch
Fixes generic/099
but no need to change
> Fixes: 95dd8b2c1ed0 ("fs/ntfs3: Remove unnecessary functions")
>
> Signed-off-by: Konstantin Komarov <almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx>
Reviewed-by: Kari Argillander <kari.argillander@xxxxxxxxx>
> ---
> fs/ntfs3/xattr.c | 96 +++++++++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 95 insertions(+), 1 deletion(-)
>
> diff --git a/fs/ntfs3/xattr.c b/fs/ntfs3/xattr.c
> index 2143099cffdf..3ccdb8c2ac0b 100644
> --- a/fs/ntfs3/xattr.c
> +++ b/fs/ntfs3/xattr.c
> @@ -112,7 +112,7 @@ static int ntfs_read_ea(struct ntfs_inode *ni, struct EA_FULL **ea,
> return -ENOMEM;
>
> if (!size) {
> - ;
> + /* EA info persists, but xattr is empty. Looks like EA problem. */
> } else if (attr_ea->non_res) {
> struct runs_tree run;
>
> @@ -616,6 +616,67 @@ int ntfs_set_acl(struct user_namespace *mnt_userns, struct inode *inode,
> return ntfs_set_acl_ex(mnt_userns, inode, acl, type);
> }
>
> +static int ntfs_xattr_get_acl(struct user_namespace *mnt_userns,
> + struct inode *inode, int type, void *buffer,
> + size_t size)
> +{
> + struct posix_acl *acl;
> + int err;
> +
> + if (!(inode->i_sb->s_flags & SB_POSIXACL)) {
> + ntfs_inode_warn(inode, "add mount option \"acl\" to use acl");
> + return -EOPNOTSUPP;
> + }
> +
> + acl = ntfs_get_acl(inode, type);
> + if (IS_ERR(acl))
> + return PTR_ERR(acl);
> +
> + if (!acl)
> + return -ENODATA;
> +
> + err = posix_acl_to_xattr(mnt_userns, acl, buffer, size);
> + posix_acl_release(acl);
> +
> + return err;
> +}
> +
> +static int ntfs_xattr_set_acl(struct user_namespace *mnt_userns,
> + struct inode *inode, int type, const void *value,
> + size_t size)
> +{
> + struct posix_acl *acl;
> + int err;
> +
> + if (!(inode->i_sb->s_flags & SB_POSIXACL)) {
> + ntfs_inode_warn(inode, "add mount option \"acl\" to use acl");
> + return -EOPNOTSUPP;
> + }
> +
> + if (!inode_owner_or_capable(mnt_userns, inode))
> + return -EPERM;
> +
> + if (!value) {
> + acl = NULL;
> + } else {
> + acl = posix_acl_from_xattr(mnt_userns, value, size);
> + if (IS_ERR(acl))
> + return PTR_ERR(acl);
> +
> + if (acl) {
> + err = posix_acl_valid(mnt_userns, acl);
> + if (err)
> + goto release_and_out;
> + }
> + }
> +
> + err = ntfs_set_acl(mnt_userns, inode, acl, type);
> +
> +release_and_out:
> + posix_acl_release(acl);
> + return err;
> +}
> +
> /*
> * ntfs_init_acl - Initialize the ACLs of a new inode.
> *
> @@ -782,6 +843,23 @@ static int ntfs_getxattr(const struct xattr_handler *handler, struct dentry *de,
> goto out;
> }
>
> +#ifdef CONFIG_NTFS3_FS_POSIX_ACL
> + if ((name_len == sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1 &&
> + !memcmp(name, XATTR_NAME_POSIX_ACL_ACCESS,
> + sizeof(XATTR_NAME_POSIX_ACL_ACCESS))) ||
> + (name_len == sizeof(XATTR_NAME_POSIX_ACL_DEFAULT) - 1 &&
> + !memcmp(name, XATTR_NAME_POSIX_ACL_DEFAULT,
> + sizeof(XATTR_NAME_POSIX_ACL_DEFAULT)))) {
> + /* TODO: init_user_ns? */
> + err = ntfs_xattr_get_acl(
> + &init_user_ns, inode,
> + name_len == sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1
> + ? ACL_TYPE_ACCESS
> + : ACL_TYPE_DEFAULT,
> + buffer, size);
> + goto out;
> + }
> +#endif
> /* Deal with NTFS extended attribute. */
> err = ntfs_get_ea(inode, name, name_len, buffer, size, NULL);
>
> @@ -894,6 +972,22 @@ static noinline int ntfs_setxattr(const struct xattr_handler *handler,
> goto out;
> }
>
> +#ifdef CONFIG_NTFS3_FS_POSIX_ACL
> + if ((name_len == sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1 &&
> + !memcmp(name, XATTR_NAME_POSIX_ACL_ACCESS,
> + sizeof(XATTR_NAME_POSIX_ACL_ACCESS))) ||
> + (name_len == sizeof(XATTR_NAME_POSIX_ACL_DEFAULT) - 1 &&
> + !memcmp(name, XATTR_NAME_POSIX_ACL_DEFAULT,
> + sizeof(XATTR_NAME_POSIX_ACL_DEFAULT)))) {
> + err = ntfs_xattr_set_acl(
> + mnt_userns, inode,
> + name_len == sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1
> + ? ACL_TYPE_ACCESS
> + : ACL_TYPE_DEFAULT,
> + value, size);
> + goto out;
> + }
> +#endif
> /* Deal with NTFS extended attribute. */
> err = ntfs_set_ea(inode, name, name_len, value, size, flags);
>
> --
> 2.33.0
>
