Commit af34983e authored by Hyunchul Lee's avatar Hyunchul Lee Committed by Namjae Jeon
Browse files

ksmbd: add user namespace support 

For user namespace support, call vfs functions
with struct user_namespace got from struct path.

This patch have been tested mannually as below.

Create an id-mapped mount using the mount-idmapped utility
(https://github.com/brauner/mount-idmapped

).
$ mount-idmapped --map-mount b:1003:1002:1 /home/foo <EXPORT DIR>/foo
(the user, "foo" is 1003, and the user "bar" is 1002).

And  mount the export directory using cifs with the user, "bar".
succeed to create/delete/stat/read/write files and directory in
the <EXPORT DIR>/foo. But fail with a bind mount for /home/foo.

Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarHyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: default avatarNamjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
parent ef24c962

fs/ksmbd/ndr.c

+5 −3
Original line number Diff line number Diff line
@@ -222,7 +222,9 @@ static int ndr_encode_posix_acl_entry(struct ndr *n, struct xattr_smb_acl *acl) 
	return 0;

}



int ndr_encode_posix_acl(struct ndr *n, struct inode *inode,

int ndr_encode_posix_acl(struct ndr *n,

			 struct user_namespace *user_ns,

			 struct inode *inode,

			 struct xattr_smb_acl *acl,

			 struct xattr_smb_acl *def_acl)

{
@@ -250,8 +252,8 @@ int ndr_encode_posix_acl(struct ndr *n, struct inode *inode, 
		ndr_write_int32(n, 0);

	}



	ndr_write_int64(n, from_kuid(&init_user_ns, inode->i_uid));

	ndr_write_int64(n, from_kgid(&init_user_ns, inode->i_gid));

	ndr_write_int64(n, from_kuid(user_ns, inode->i_uid));

	ndr_write_int64(n, from_kgid(user_ns, inode->i_gid));

	ndr_write_int32(n, inode->i_mode);



	if (acl) {

fs/ksmbd/ndr.h

+2 −2
Original line number Diff line number Diff line
@@ -14,8 +14,8 @@ struct ndr { 


int ndr_encode_dos_attr(struct ndr *n, struct xattr_dos_attrib *da);

int ndr_decode_dos_attr(struct ndr *n, struct xattr_dos_attrib *da);

int ndr_encode_posix_acl(struct ndr *n, struct inode *inode,

			 struct xattr_smb_acl *acl,

int ndr_encode_posix_acl(struct ndr *n, struct user_namespace *user_ns,

			 struct inode *inode, struct xattr_smb_acl *acl,

			 struct xattr_smb_acl *def_acl);

int ndr_encode_v4_ntacl(struct ndr *n, struct xattr_ntacl *acl);

int ndr_encode_v3_ntacl(struct ndr *n, struct xattr_ntacl *acl);

fs/ksmbd/oplock.c

+2 −2
Original line number Diff line number Diff line
@@ -1612,9 +1612,9 @@ void create_posix_rsp_buf(char *cc, struct ksmbd_file *fp) 
	buf->nlink = cpu_to_le32(inode->i_nlink);

	buf->reparse_tag = cpu_to_le32(fp->volatile_id);

	buf->mode = cpu_to_le32(inode->i_mode);

	id_to_sid(from_kuid(&init_user_ns, inode->i_uid),

	id_to_sid(from_kuid(file_mnt_user_ns(fp->filp), inode->i_uid),

		  SIDNFS_USER, (struct smb_sid *)&buf->SidBuffer[0]);

	id_to_sid(from_kgid(&init_user_ns, inode->i_gid),

	id_to_sid(from_kgid(file_mnt_user_ns(fp->filp), inode->i_gid),

		  SIDNFS_GROUP, (struct smb_sid *)&buf->SidBuffer[20]);

}

fs/ksmbd/smb2pdu.c

+73 −40
Original line number Diff line number Diff line
@@ -2081,14 +2081,16 @@ static int smb2_set_ea(struct smb2_ea_info *eabuf, struct path *path) 
		value = (char *)&eabuf->name + eabuf->EaNameLength + 1;



		if (!eabuf->EaValueLength) {

			rc = ksmbd_vfs_casexattr_len(path->dentry,

			rc = ksmbd_vfs_casexattr_len(mnt_user_ns(path->mnt),

						     path->dentry,

						     attr_name,

						     XATTR_USER_PREFIX_LEN +

						     eabuf->EaNameLength);



			/* delete the EA only when it exits */

			if (rc > 0) {

				rc = ksmbd_vfs_remove_xattr(path->dentry,

				rc = ksmbd_vfs_remove_xattr(mnt_user_ns(path->mnt),

							    path->dentry,

							    attr_name);



				if (rc < 0) {
@@ -2102,7 +2104,8 @@ static int smb2_set_ea(struct smb2_ea_info *eabuf, struct path *path) 
			/* if the EA doesn't exist, just do nothing. */

			rc = 0;

		} else {

			rc = ksmbd_vfs_setxattr(path->dentry, attr_name, value,

			rc = ksmbd_vfs_setxattr(mnt_user_ns(path->mnt),

						path->dentry, attr_name, value,

						le16_to_cpu(eabuf->EaValueLength), 0);

			if (rc < 0) {

				ksmbd_debug(SMB,
@@ -2155,7 +2158,8 @@ static noinline int smb2_set_stream_name_xattr(struct path *path, 
	fp->stream.size = xattr_stream_size;



	/* Check if there is stream prefix in xattr space */

	rc = ksmbd_vfs_casexattr_len(path->dentry,

	rc = ksmbd_vfs_casexattr_len(mnt_user_ns(path->mnt),

				     path->dentry,

				     xattr_stream_name,

				     xattr_stream_size);

	if (rc >= 0)
@@ -2166,7 +2170,8 @@ static noinline int smb2_set_stream_name_xattr(struct path *path, 
		return -EBADF;

	}



	rc = ksmbd_vfs_setxattr(path->dentry, xattr_stream_name, NULL, 0, 0);

	rc = ksmbd_vfs_setxattr(mnt_user_ns(path->mnt),

				path->dentry, xattr_stream_name, NULL, 0, 0);

	if (rc < 0)

		pr_err("Failed to store XATTR stream name :%d\n", rc);

	return 0;
@@ -2196,7 +2201,8 @@ static int smb2_remove_smb_xattrs(struct path *path) 
		    strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, STREAM_PREFIX_LEN))

			continue;



		err = ksmbd_vfs_remove_xattr(path->dentry, name);

		err = ksmbd_vfs_remove_xattr(mnt_user_ns(path->mnt),

					     path->dentry, name);

		if (err)

			ksmbd_debug(SMB, "remove xattr failed : %s\n", name);

	}
@@ -2240,7 +2246,8 @@ static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, struct path *path, 
	da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |

		XATTR_DOSINFO_ITIME;



	rc = ksmbd_vfs_set_dos_attrib_xattr(path->dentry, &da);

	rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_user_ns(path->mnt),

					    path->dentry, &da);

	if (rc)

		ksmbd_debug(SMB, "failed to store file attribute into xattr\n");

}
@@ -2258,7 +2265,8 @@ static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon, 
				    KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))

		return;



	rc = ksmbd_vfs_get_dos_attrib_xattr(path->dentry, &da);

	rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_user_ns(path->mnt),

					    path->dentry, &da);

	if (rc > 0) {

		fp->f_ci->m_fattr = cpu_to_le32(da.attr);

		fp->create_time = da.create_time;
@@ -2634,7 +2642,7 @@ int smb2_open(struct ksmbd_work *work) 
		rc = 0;

	} else {

		file_present = true;

		generic_fillattr(&init_user_ns, d_inode(path.dentry), &stat);

		generic_fillattr(mnt_user_ns(path.mnt), d_inode(path.dentry), &stat);

	}

	if (stream_name) {

		if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
@@ -2695,7 +2703,8 @@ int smb2_open(struct ksmbd_work *work) 
		if (!file_present) {

			daccess = cpu_to_le32(GENERIC_ALL_FLAGS);

		} else {

			rc = ksmbd_vfs_query_maximal_access(path.dentry,

			rc = ksmbd_vfs_query_maximal_access(mnt_user_ns(path.mnt),

							    path.dentry,

							    &daccess);

			if (rc)

				goto err_out;
@@ -2738,7 +2747,7 @@ int smb2_open(struct ksmbd_work *work) 
		 * is already granted.

		 */

		if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {

			rc = inode_permission(&init_user_ns,

			rc = inode_permission(mnt_user_ns(path.mnt),

					      d_inode(path.dentry),

					      may_flags);

			if (rc)
@@ -2746,7 +2755,8 @@ int smb2_open(struct ksmbd_work *work) 


			if ((daccess & FILE_DELETE_LE) ||

			    (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {

				rc = ksmbd_vfs_may_delete(path.dentry);

				rc = ksmbd_vfs_may_delete(mnt_user_ns(path.mnt),

							  path.dentry);

				if (rc)

					goto err_out;

			}
@@ -2809,7 +2819,9 @@ int smb2_open(struct ksmbd_work *work) 
		int posix_acl_rc;

		struct inode *inode = d_inode(path.dentry);



		posix_acl_rc = ksmbd_vfs_inherit_posix_acl(inode, d_inode(path.dentry->d_parent));

		posix_acl_rc = ksmbd_vfs_inherit_posix_acl(mnt_user_ns(path.mnt),

							   inode,

							   d_inode(path.dentry->d_parent));

		if (posix_acl_rc)

			ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
@@ -2823,7 +2835,8 @@ int smb2_open(struct ksmbd_work *work) 
			rc = smb2_create_sd_buffer(work, req, &path);

			if (rc) {

				if (posix_acl_rc)

					ksmbd_vfs_set_init_posix_acl(inode);

					ksmbd_vfs_set_init_posix_acl(mnt_user_ns(path.mnt),

								     inode);



				if (test_share_config_flag(work->tcon->share_conf,

							   KSMBD_SHARE_FLAG_ACL_XATTR)) {
@@ -2845,7 +2858,8 @@ int smb2_open(struct ksmbd_work *work) 
					if (!pntsd)

						goto err_out;



					rc = build_sec_desc(pntsd, NULL,

					rc = build_sec_desc(mnt_user_ns(path.mnt),

							    pntsd, NULL,

							    OWNER_SECINFO |

							    GROUP_SECINFO |

							    DACL_SECINFO,
@@ -2854,6 +2868,7 @@ int smb2_open(struct ksmbd_work *work) 
					posix_acl_release(fattr.cf_dacls);



					rc = ksmbd_vfs_set_sd_xattr(conn,

								    mnt_user_ns(path.mnt),

								    path.dentry,

								    pntsd,

								    pntsd_size);
@@ -2895,7 +2910,7 @@ int smb2_open(struct ksmbd_work *work) 


	rc = ksmbd_vfs_getattr(&path, &stat);

	if (rc) {

		generic_fillattr(&init_user_ns, d_inode(path.dentry), &stat);

		generic_fillattr(mnt_user_ns(path.mnt), d_inode(path.dentry), &stat);

		rc = 0;

	}
@@ -2996,7 +3011,8 @@ int smb2_open(struct ksmbd_work *work) 


	memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);



	generic_fillattr(&init_user_ns, file_inode(fp->filp), &stat);

	generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),

			 &stat);



	rsp->StructureSize = cpu_to_le16(89);

	rcu_read_lock();
@@ -3048,7 +3064,8 @@ int smb2_open(struct ksmbd_work *work) 
		struct create_context *mxac_ccontext;



		if (maximal_access == 0)

			ksmbd_vfs_query_maximal_access(path.dentry,

			ksmbd_vfs_query_maximal_access(mnt_user_ns(path.mnt),

						       path.dentry,

						       &maximal_access);

		mxac_ccontext = (struct create_context *)(rsp->Buffer +

				le32_to_cpu(rsp->CreateContextsLength));
@@ -3251,6 +3268,7 @@ static int dentry_name(struct ksmbd_dir_info *d_info, int info_level) 
 * @conn:	connection instance

 * @info_level:	smb information level

 * @d_info:	structure included variables for query dir

 * @user_ns:	user namespace

 * @ksmbd_kstat:	ksmbd wrapper of dirent stat information

 *

 * if directory has many entries, find first can't read it fully.
@@ -3260,6 +3278,7 @@ static int dentry_name(struct ksmbd_dir_info *d_info, int info_level) 
 */

static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,

				       struct ksmbd_dir_info *d_info,

				       struct user_namespace *user_ns,

				       struct ksmbd_kstat *ksmbd_kstat)

{

	int next_entry_offset = 0;
@@ -3412,9 +3431,9 @@ static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level, 
			S_ISDIR(ksmbd_kstat->kstat->mode) ? ATTR_DIRECTORY_LE : ATTR_ARCHIVE_LE;

		if (d_info->hide_dot_file && d_info->name[0] == '.')

			posix_info->DosAttributes |= ATTR_HIDDEN_LE;

		id_to_sid(from_kuid(&init_user_ns, ksmbd_kstat->kstat->uid),

		id_to_sid(from_kuid(user_ns, ksmbd_kstat->kstat->uid),

			  SIDNFS_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);

		id_to_sid(from_kgid(&init_user_ns, ksmbd_kstat->kstat->gid),

		id_to_sid(from_kgid(user_ns, ksmbd_kstat->kstat->gid),

			  SIDNFS_GROUP, (struct smb_sid *)&posix_info->SidBuffer[20]);

		memcpy(posix_info->name, conv_name, conv_len);

		posix_info->name_len = cpu_to_le32(conv_len);
@@ -3496,12 +3515,14 @@ static int process_query_dir_entries(struct smb2_query_dir_private *priv) 
		ksmbd_kstat.kstat = &kstat;

		if (priv->info_level != FILE_NAMES_INFORMATION)

			ksmbd_vfs_fill_dentry_attrs(priv->work,

						    file_mnt_user_ns(priv->dir_fp->filp),

						    dent,

						    &ksmbd_kstat);



		rc = smb2_populate_readdir_entry(priv->work->conn,

						 priv->info_level,

						 priv->d_info,

						 file_mnt_user_ns(priv->dir_fp->filp),

						 &ksmbd_kstat);

		dput(dent);

		if (rc)
@@ -3710,7 +3731,8 @@ int smb2_query_dir(struct ksmbd_work *work) 
	}



	if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||

	    inode_permission(&init_user_ns, file_inode(dir_fp->filp),

	    inode_permission(file_mnt_user_ns(dir_fp->filp),

			     file_inode(dir_fp->filp),

			     MAY_READ | MAY_EXEC)) {

		pr_err("no right to enumerate directory (%pd)\n",

		       dir_fp->filp->f_path.dentry);
@@ -4035,7 +4057,8 @@ static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp, 
		buf_free_len -= (offsetof(struct smb2_ea_info, name) +

				name_len + 1);

		/* bailout if xattr can't fit in buf_free_len */

		value_len = ksmbd_vfs_getxattr(path->dentry, name, &buf);

		value_len = ksmbd_vfs_getxattr(mnt_user_ns(path->mnt),

					       path->dentry, name, &buf);

		if (value_len <= 0) {

			rc = -ENOENT;

			rsp->hdr.Status = STATUS_INVALID_HANDLE;
@@ -4124,7 +4147,8 @@ static int get_file_basic_info(struct smb2_query_info_rsp *rsp, 
	}



	basic_info = (struct smb2_file_all_info *)rsp->Buffer;

	generic_fillattr(&init_user_ns, file_inode(fp->filp), &stat);

	generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),

			 &stat);

	basic_info->CreationTime = cpu_to_le64(fp->create_time);

	time = ksmbd_UnixTimeToNT(stat.atime);

	basic_info->LastAccessTime = cpu_to_le64(time);
@@ -4165,7 +4189,7 @@ static void get_file_standard_info(struct smb2_query_info_rsp *rsp, 
	struct kstat stat;



	inode = file_inode(fp->filp);

	generic_fillattr(&init_user_ns, inode, &stat);

	generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);



	sinfo = (struct smb2_file_standard_info *)rsp->Buffer;

	delete_pending = ksmbd_inode_pending_delete(fp);
@@ -4220,7 +4244,7 @@ static int get_file_all_info(struct ksmbd_work *work, 
		return -ENOMEM;



	inode = file_inode(fp->filp);

	generic_fillattr(&init_user_ns, inode, &stat);

	generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);



	ksmbd_debug(SMB, "filename = %s\n", filename);

	delete_pending = ksmbd_inode_pending_delete(fp);
@@ -4295,7 +4319,8 @@ static void get_file_stream_info(struct ksmbd_work *work, 
	ssize_t xattr_list_len;

	int nbytes = 0, streamlen, stream_name_len, next, idx = 0;



	generic_fillattr(&init_user_ns, file_inode(fp->filp), &stat);

	generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),

			 &stat);

	file_info = (struct smb2_file_stream_info *)rsp->Buffer;



	xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
@@ -4374,7 +4399,8 @@ static void get_file_internal_info(struct smb2_query_info_rsp *rsp, 
	struct smb2_file_internal_info *file_info;

	struct kstat stat;



	generic_fillattr(&init_user_ns, file_inode(fp->filp), &stat);

	generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),

			 &stat);

	file_info = (struct smb2_file_internal_info *)rsp->Buffer;

	file_info->IndexNumber = cpu_to_le64(stat.ino);

	rsp->OutputBufferLength =
@@ -4399,7 +4425,7 @@ static int get_file_network_open_info(struct smb2_query_info_rsp *rsp, 
	file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;



	inode = file_inode(fp->filp);

	generic_fillattr(&init_user_ns, inode, &stat);

	generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);



	file_info->CreationTime = cpu_to_le64(fp->create_time);

	time = ksmbd_UnixTimeToNT(stat.atime);
@@ -4460,7 +4486,8 @@ static void get_file_compression_info(struct smb2_query_info_rsp *rsp, 
	struct smb2_file_comp_info *file_info;

	struct kstat stat;



	generic_fillattr(&init_user_ns, file_inode(fp->filp), &stat);

	generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),

			 &stat);



	file_info = (struct smb2_file_comp_info *)rsp->Buffer;

	file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
@@ -4933,9 +4960,11 @@ static int smb2_get_info_sec(struct ksmbd_work *work, 


	if (test_share_config_flag(work->tcon->share_conf,

				   KSMBD_SHARE_FLAG_ACL_XATTR))

		ksmbd_vfs_get_sd_xattr(work->conn, fp->filp->f_path.dentry, &ppntsd);

		ksmbd_vfs_get_sd_xattr(work->conn, file_mnt_user_ns(fp->filp),

				       fp->filp->f_path.dentry, &ppntsd);



	rc = build_sec_desc(pntsd, ppntsd, addition_info, &secdesclen, &fattr);

	rc = build_sec_desc(file_mnt_user_ns(fp->filp),

			    pntsd, ppntsd, addition_info, &secdesclen, &fattr);

	posix_acl_release(fattr.cf_acls);

	posix_acl_release(fattr.cf_dacls);

	kfree(ppntsd);
@@ -5228,7 +5257,8 @@ static int smb2_rename(struct ksmbd_work *work, struct ksmbd_file *fp, 
		if (rc)

			goto out;



		rc = ksmbd_vfs_setxattr(fp->filp->f_path.dentry,

		rc = ksmbd_vfs_setxattr(file_mnt_user_ns(fp->filp),

					fp->filp->f_path.dentry,

					xattr_stream_name,

					NULL, 0, 0);

		if (rc < 0) {
@@ -5412,7 +5442,8 @@ static int set_file_basic_info(struct ksmbd_file *fp, char *buf, 
		da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |

			XATTR_DOSINFO_ITIME;



		rc = ksmbd_vfs_set_dos_attrib_xattr(filp->f_path.dentry, &da);

		rc = ksmbd_vfs_set_dos_attrib_xattr(file_mnt_user_ns(filp),

						    filp->f_path.dentry, &da);

		if (rc)

			ksmbd_debug(SMB,

				    "failed to restore file attribute in EA\n");
@@ -5433,14 +5464,14 @@ static int set_file_basic_info(struct ksmbd_file *fp, char *buf, 
		if (IS_IMMUTABLE(inode) || IS_APPEND(inode))

			return -EACCES;



		rc = setattr_prepare(&init_user_ns, dentry, &attrs);

		rc = setattr_prepare(file_mnt_user_ns(filp), dentry, &attrs);

		if (rc)

			return -EINVAL;



		inode_lock(inode);

		setattr_copy(&init_user_ns, inode, &attrs);

		setattr_copy(file_mnt_user_ns(filp), inode, &attrs);

		attrs.ia_valid &= ~ATTR_CTIME;

		rc = notify_change(&init_user_ns, dentry, &attrs, NULL);

		rc = notify_change(file_mnt_user_ns(filp), dentry, &attrs, NULL);

		inode_unlock(inode);

	}

	return 0;
@@ -7188,12 +7219,14 @@ static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id, 
				   KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {

		struct xattr_dos_attrib da;



		ret = ksmbd_vfs_get_dos_attrib_xattr(fp->filp->f_path.dentry, &da);

		ret = ksmbd_vfs_get_dos_attrib_xattr(file_mnt_user_ns(fp->filp),

						     fp->filp->f_path.dentry, &da);

		if (ret <= 0)

			goto out;



		da.attr = le32_to_cpu(fp->f_ci->m_fattr);

		ret = ksmbd_vfs_set_dos_attrib_xattr(fp->filp->f_path.dentry, &da);

		ret = ksmbd_vfs_set_dos_attrib_xattr(file_mnt_user_ns(fp->filp),

						     fp->filp->f_path.dentry, &da);

		if (ret)

			fp->f_ci->m_fattr = old_fattr;

	}

fs/ksmbd/smb_common.c

+4 −1
Original line number Diff line number Diff line
@@ -274,6 +274,7 @@ int ksmbd_populate_dot_dotdot_entries(struct ksmbd_work *work, int info_level, 
				      char *search_pattern,

				      int (*fn)(struct ksmbd_conn *, int,

						struct ksmbd_dir_info *,

						struct user_namespace *,

						struct ksmbd_kstat *))

{

	int i, rc = 0;
@@ -300,9 +301,11 @@ int ksmbd_populate_dot_dotdot_entries(struct ksmbd_work *work, int info_level, 


			ksmbd_kstat.kstat = &kstat;

			ksmbd_vfs_fill_dentry_attrs(work,

						    file_mnt_user_ns(dir->filp),

						    dir->filp->f_path.dentry->d_parent,

						    &ksmbd_kstat);

			rc = fn(conn, info_level, d_info, &ksmbd_kstat);

			rc = fn(conn, info_level, d_info,

				file_mnt_user_ns(dir->filp), &ksmbd_kstat);

			if (rc)

				break;

			if (d_info->out_buf_len <= 0)