Merge tag '5.15-rc-ksmbd-part2' of git://git.samba.org/ksmbd

Pull ksmbd fixes from Steve French:

 - various fixes pointed out by coverity, and a minor cleanup patch

 - id mapping and ownership fixes

 - an smbdirect fix

* tag '5.15-rc-ksmbd-part2' of git://git.samba.org/ksmbd:
  ksmbd: fix control flow issues in sid_to_id()
  ksmbd: fix read of uninitialized variable ret in set_file_basic_info
  ksmbd: add missing assignments to ret on ndr_read_int64 read calls
  ksmbd: add validation for ndr read/write functions
  ksmbd: remove unused ksmbd_file_table_flush function
  ksmbd: smbd: fix dma mapping error in smb_direct_post_send_data
  ksmbd: Reduce error log 'speed is unknown' to debug
  ksmbd: defer notify_change() call
  ksmbd: remove setattr preparations in set_file_basic_info()
  ksmbd: ensure error is surfaced in set_file_basic_info()
  ndr: fix translation in ndr_encode_posix_acl()
  ksmbd: fix translation in sid_to_id()
  ksmbd: fix subauth 0 handling in sid_to_id()
  ksmbd: fix translation in acl entries
  ksmbd: fix translation in ksmbd_acls_fattr()
  ksmbd: fix translation in create_posix_rsp_buf()
  ksmbd: fix translation in smb2_populate_readdir_entry()
  ksmbd: fix lookup on idmapped mounts

fs/ksmbd/oplock.c

@@ -1614,9 +1614,11 @@ 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(user_ns, inode->i_uid),
+	id_to_sid(from_kuid_munged(&init_user_ns,
+				   i_uid_into_mnt(user_ns, inode)),
 		  SIDNFS_USER, (struct smb_sid *)&buf->SidBuffer[0]);
-	id_to_sid(from_kgid(user_ns, inode->i_gid),
+	id_to_sid(from_kgid_munged(&init_user_ns,
+				   i_gid_into_mnt(user_ns, inode)),
 		  SIDNFS_GROUP, (struct smb_sid *)&buf->SidBuffer[20]);
 }
 

fs/ksmbd/smb2pdu.c

@@ -2381,10 +2381,12 @@ static int smb2_create_sd_buffer(struct ksmbd_work *work,
 			    le32_to_cpu(sd_buf->ccontext.DataLength), true);
 }
 
-static void ksmbd_acls_fattr(struct smb_fattr *fattr, struct inode *inode)
+static void ksmbd_acls_fattr(struct smb_fattr *fattr,
+			     struct user_namespace *mnt_userns,
+			     struct inode *inode)
 {
-	fattr->cf_uid = inode->i_uid;
-	fattr->cf_gid = inode->i_gid;
+	fattr->cf_uid = i_uid_into_mnt(mnt_userns, inode);
+	fattr->cf_gid = i_gid_into_mnt(mnt_userns, inode);
 	fattr->cf_mode = inode->i_mode;
 	fattr->cf_acls = NULL;
 	fattr->cf_dacls = NULL;
@@ -2893,7 +2895,7 @@ int smb2_open(struct ksmbd_work *work)
 					struct smb_ntsd *pntsd;
 					int pntsd_size, ace_num = 0;
 
-					ksmbd_acls_fattr(&fattr, inode);
+					ksmbd_acls_fattr(&fattr, user_ns, inode);
 					if (fattr.cf_acls)
 						ace_num = fattr.cf_acls->a_count;
 					if (fattr.cf_dacls)
@@ -3324,7 +3326,6 @@ 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;
@@ -3478,9 +3479,9 @@ 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(user_ns, ksmbd_kstat->kstat->uid),
+		id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
 			  SIDNFS_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
-		id_to_sid(from_kgid(user_ns, ksmbd_kstat->kstat->gid),
+		id_to_sid(from_kgid_munged(&init_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);
@@ -3543,9 +3544,9 @@ static int process_query_dir_entries(struct smb2_query_dir_private *priv)
 			return -EINVAL;
 
 		lock_dir(priv->dir_fp);
-		dent = lookup_one_len(priv->d_info->name,
-				      priv->dir_fp->filp->f_path.dentry,
-				      priv->d_info->name_len);
+		dent = lookup_one(user_ns, priv->d_info->name,
+				  priv->dir_fp->filp->f_path.dentry,
+				  priv->d_info->name_len);
 		unlock_dir(priv->dir_fp);
 
 		if (IS_ERR(dent)) {
@@ -3571,7 +3572,6 @@ static int process_query_dir_entries(struct smb2_query_dir_private *priv)
 		rc = smb2_populate_readdir_entry(priv->work->conn,
 						 priv->info_level,
 						 priv->d_info,
-						 user_ns,
 						 &ksmbd_kstat);
 		dput(dent);
 		if (rc)
@@ -5008,7 +5008,7 @@ static int smb2_get_info_sec(struct ksmbd_work *work,
 
 	user_ns = file_mnt_user_ns(fp->filp);
 	inode = file_inode(fp->filp);
-	ksmbd_acls_fattr(&fattr, inode);
+	ksmbd_acls_fattr(&fattr, user_ns, inode);
 
 	if (test_share_config_flag(work->tcon->share_conf,
 				   KSMBD_SHARE_FLAG_ACL_XATTR))
@@ -5246,7 +5246,9 @@ int smb2_echo(struct ksmbd_work *work)
 	return 0;
 }
 
-static int smb2_rename(struct ksmbd_work *work, struct ksmbd_file *fp,
+static int smb2_rename(struct ksmbd_work *work,
+		       struct ksmbd_file *fp,
+		       struct user_namespace *user_ns,
 		       struct smb2_file_rename_info *file_info,
 		       struct nls_table *local_nls)
 {
@@ -5310,7 +5312,7 @@ static int smb2_rename(struct ksmbd_work *work, struct ksmbd_file *fp,
 		if (rc)
 			goto out;
 
-		rc = ksmbd_vfs_setxattr(file_mnt_user_ns(fp->filp),
+		rc = ksmbd_vfs_setxattr(user_ns,
 					fp->filp->f_path.dentry,
 					xattr_stream_name,
 					NULL, 0, 0);
@@ -5438,11 +5440,11 @@ static int set_file_basic_info(struct ksmbd_file *fp, char *buf,
 {
 	struct smb2_file_all_info *file_info;
 	struct iattr attrs;
-	struct iattr temp_attrs;
+	struct timespec64 ctime;
 	struct file *filp;
 	struct inode *inode;
 	struct user_namespace *user_ns;
-	int rc;
+	int rc = 0;
 
 	if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
 		return -EACCES;
@@ -5462,11 +5464,11 @@ static int set_file_basic_info(struct ksmbd_file *fp, char *buf,
 	}
 
 	if (file_info->ChangeTime) {
-		temp_attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
-		attrs.ia_ctime = temp_attrs.ia_ctime;
+		attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
+		ctime = attrs.ia_ctime;
 		attrs.ia_valid |= ATTR_CTIME;
 	} else {
-		temp_attrs.ia_ctime = inode->i_ctime;
+		ctime = inode->i_ctime;
 	}
 
 	if (file_info->LastWriteTime) {
@@ -5505,13 +5507,6 @@ static int set_file_basic_info(struct ksmbd_file *fp, char *buf,
 		rc = 0;
 	}
 
-	/*
-	 * HACK : set ctime here to avoid ctime changed
-	 * when file_info->ChangeTime is zero.
-	 */
-	attrs.ia_ctime = temp_attrs.ia_ctime;
-	attrs.ia_valid |= ATTR_CTIME;
-
 	if (attrs.ia_valid) {
 		struct dentry *dentry = filp->f_path.dentry;
 		struct inode *inode = d_inode(dentry);
@@ -5519,17 +5514,15 @@ static int set_file_basic_info(struct ksmbd_file *fp, char *buf,
 		if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
 			return -EACCES;
 
-		rc = setattr_prepare(user_ns, dentry, &attrs);
-		if (rc)
-			return -EINVAL;
-
 		inode_lock(inode);
-		setattr_copy(user_ns, inode, &attrs);
-		attrs.ia_valid &= ~ATTR_CTIME;
 		rc = notify_change(user_ns, dentry, &attrs, NULL);
+		if (!rc) {
+			inode->i_ctime = ctime;
+			mark_inode_dirty(inode);
+		}
 		inode_unlock(inode);
 	}
-	return 0;
+	return rc;
 }
 
 static int set_file_allocation_info(struct ksmbd_work *work,
@@ -5624,6 +5617,7 @@ static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
 			   char *buf)
 {
+	struct user_namespace *user_ns;
 	struct ksmbd_file *parent_fp;
 	struct dentry *parent;
 	struct dentry *dentry = fp->filp->f_path.dentry;
@@ -5634,11 +5628,12 @@ static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
 		return -EACCES;
 	}
 
+	user_ns = file_mnt_user_ns(fp->filp);
 	if (ksmbd_stream_fd(fp))
 		goto next;
 
 	parent = dget_parent(dentry);
-	ret = ksmbd_vfs_lock_parent(parent, dentry);
+	ret = ksmbd_vfs_lock_parent(user_ns, parent, dentry);
 	if (ret) {
 		dput(parent);
 		return ret;
@@ -5655,7 +5650,7 @@ static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
 		}
 	}
 next:
-	return smb2_rename(work, fp,
+	return smb2_rename(work, fp, user_ns,
 			   (struct smb2_file_rename_info *)buf,
 			   work->sess->conn->local_nls);
 }
@@ -7116,8 +7111,8 @@ static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
 			netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
 			speed = cmd.base.speed;
 		} else {
-			pr_err("%s %s\n", netdev->name,
-			       "speed is unknown, defaulting to 1Gb/sec");
+			ksmbd_debug(SMB, "%s %s\n", netdev->name,
+				    "speed is unknown, defaulting to 1Gb/sec");
 			speed = SPEED_1000;
 		}
 

fs/ksmbd/smb_common.c

@@ -291,7 +291,6 @@ 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;
@@ -322,8 +321,7 @@ int ksmbd_populate_dot_dotdot_entries(struct ksmbd_work *work, int info_level,
 						    user_ns,
 						    dir->filp->f_path.dentry->d_parent,
 						    &ksmbd_kstat);
-			rc = fn(conn, info_level, d_info,
-				user_ns, &ksmbd_kstat);
+			rc = fn(conn, info_level, d_info, &ksmbd_kstat);
 			if (rc)
 				break;
 			if (d_info->out_buf_len <= 0)

fs/ksmbd/smb_common.h

@@ -511,7 +511,6 @@ int ksmbd_populate_dot_dotdot_entries(struct ksmbd_work *work,
 				      int (*fn)(struct ksmbd_conn *,
 						int,
 						struct ksmbd_dir_info *,
-						struct user_namespace *,
 						struct ksmbd_kstat *));
 
 int ksmbd_extract_shortname(struct ksmbd_conn *conn,

fs/ksmbd/smbacl.c

@@ -274,24 +274,34 @@ static int sid_to_id(struct user_namespace *user_ns,
 		uid_t id;
 
 		id = le32_to_cpu(psid->sub_auth[psid->num_subauth - 1]);
-		if (id > 0) {
-			uid = make_kuid(user_ns, id);
-			if (uid_valid(uid) && kuid_has_mapping(user_ns, uid)) {
-				fattr->cf_uid = uid;
-				rc = 0;
-			}
+		/*
+		 * Translate raw sid into kuid in the server's user
+		 * namespace.
+		 */
+		uid = make_kuid(&init_user_ns, id);
+
+		/* If this is an idmapped mount, apply the idmapping. */
+		uid = kuid_from_mnt(user_ns, uid);
+		if (uid_valid(uid)) {
+			fattr->cf_uid = uid;
+			rc = 0;
 		}
 	} else {
 		kgid_t gid;
 		gid_t id;
 
 		id = le32_to_cpu(psid->sub_auth[psid->num_subauth - 1]);
-		if (id > 0) {
-			gid = make_kgid(user_ns, id);
-			if (gid_valid(gid) && kgid_has_mapping(user_ns, gid)) {
-				fattr->cf_gid = gid;
-				rc = 0;
-			}
+		/*
+		 * Translate raw sid into kgid in the server's user
+		 * namespace.
+		 */
+		gid = make_kgid(&init_user_ns, id);
+
+		/* If this is an idmapped mount, apply the idmapping. */
+		gid = kgid_from_mnt(user_ns, gid);
+		if (gid_valid(gid)) {
+			fattr->cf_gid = gid;
+			rc = 0;
 		}
 	}
 
@@ -587,14 +597,14 @@ static void set_posix_acl_entries_dacl(struct user_namespace *user_ns,
 			uid_t uid;
 			unsigned int sid_type = SIDOWNER;
 
-			uid = from_kuid(user_ns, pace->e_uid);
+			uid = posix_acl_uid_translate(user_ns, pace);
 			if (!uid)
 				sid_type = SIDUNIX_USER;
 			id_to_sid(uid, sid_type, sid);
 		} else if (pace->e_tag == ACL_GROUP) {
 			gid_t gid;
 
-			gid = from_kgid(user_ns, pace->e_gid);
+			gid = posix_acl_gid_translate(user_ns, pace);
 			id_to_sid(gid, SIDUNIX_GROUP, sid);
 		} else if (pace->e_tag == ACL_OTHER && !nt_aces_num) {
 			smb_copy_sid(sid, &sid_everyone);
@@ -653,12 +663,12 @@ static void set_posix_acl_entries_dacl(struct user_namespace *user_ns,
 		if (pace->e_tag == ACL_USER) {
 			uid_t uid;
 
-			uid = from_kuid(user_ns, pace->e_uid);
+			uid = posix_acl_uid_translate(user_ns, pace);
 			id_to_sid(uid, SIDCREATOR_OWNER, sid);
 		} else if (pace->e_tag == ACL_GROUP) {
 			gid_t gid;
 
-			gid = from_kgid(user_ns, pace->e_gid);
+			gid = posix_acl_gid_translate(user_ns, pace);
 			id_to_sid(gid, SIDCREATOR_GROUP, sid);
 		} else {
 			kfree(sid);
@@ -723,7 +733,7 @@ static void set_mode_dacl(struct user_namespace *user_ns,
 	}
 
 	/* owner RID */
-	uid = from_kuid(user_ns, fattr->cf_uid);
+	uid = from_kuid(&init_user_ns, fattr->cf_uid);
 	if (uid)
 		sid = &server_conf.domain_sid;
 	else
@@ -739,7 +749,7 @@ static void set_mode_dacl(struct user_namespace *user_ns,
 	ace_size = fill_ace_for_sid(pace, &sid_unix_groups,
 				    ACCESS_ALLOWED, 0, fattr->cf_mode, 0070);
 	pace->sid.sub_auth[pace->sid.num_subauth++] =
-		cpu_to_le32(from_kgid(user_ns, fattr->cf_gid));
+		cpu_to_le32(from_kgid(&init_user_ns, fattr->cf_gid));
 	pace->size = cpu_to_le16(ace_size + 4);
 	size += le16_to_cpu(pace->size);
 	pace = (struct smb_ace *)((char *)pndace + size);
@@ -880,7 +890,7 @@ int build_sec_desc(struct user_namespace *user_ns,
 	if (!nowner_sid_ptr)
 		return -ENOMEM;
 
-	uid = from_kuid(user_ns, fattr->cf_uid);
+	uid = from_kuid(&init_user_ns, fattr->cf_uid);
 	if (!uid)
 		sid_type = SIDUNIX_USER;
 	id_to_sid(uid, sid_type, nowner_sid_ptr);
@@ -891,7 +901,7 @@ int build_sec_desc(struct user_namespace *user_ns,
 		return -ENOMEM;
 	}
 
-	gid = from_kgid(user_ns, fattr->cf_gid);
+	gid = from_kgid(&init_user_ns, fattr->cf_gid);
 	id_to_sid(gid, SIDUNIX_GROUP, ngroup_sid_ptr);
 
 	offset = sizeof(struct smb_ntsd);
@@ -1234,11 +1244,9 @@ int smb_check_perm_dacl(struct ksmbd_conn *conn, struct path *path,
 			pa_entry = posix_acls->a_entries;
 			for (i = 0; i < posix_acls->a_count; i++, pa_entry++) {
 				if (pa_entry->e_tag == ACL_USER)
-					id = from_kuid(user_ns,
-						       pa_entry->e_uid);
+					id = posix_acl_uid_translate(user_ns, pa_entry);
 				else if (pa_entry->e_tag == ACL_GROUP)
-					id = from_kgid(user_ns,
-						       pa_entry->e_gid);
+					id = posix_acl_gid_translate(user_ns, pa_entry);
 				else
 					continue;
 
@@ -1322,22 +1330,31 @@ int set_info_sec(struct ksmbd_conn *conn, struct ksmbd_tree_connect *tcon,
 	newattrs.ia_valid |= ATTR_MODE;
 	newattrs.ia_mode = (inode->i_mode & ~0777) | (fattr.cf_mode & 0777);
 
-	inode_lock(inode);
-	rc = notify_change(user_ns, path->dentry, &newattrs, NULL);
-	inode_unlock(inode);
-	if (rc)
-		goto out;
-
 	ksmbd_vfs_remove_acl_xattrs(user_ns, path->dentry);
 	/* Update posix acls */
 	if (IS_ENABLED(CONFIG_FS_POSIX_ACL) && fattr.cf_dacls) {
 		rc = set_posix_acl(user_ns, inode,
 				   ACL_TYPE_ACCESS, fattr.cf_acls);
-		if (S_ISDIR(inode->i_mode) && fattr.cf_dacls)
+		if (rc < 0)
+			ksmbd_debug(SMB,
+				    "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n",
+				    rc);
+		if (S_ISDIR(inode->i_mode) && fattr.cf_dacls) {
 			rc = set_posix_acl(user_ns, inode,
 					   ACL_TYPE_DEFAULT, fattr.cf_dacls);
+			if (rc)
+				ksmbd_debug(SMB,
+					    "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n",
+					    rc);
+		}
 	}
 
+	inode_lock(inode);
+	rc = notify_change(user_ns, path->dentry, &newattrs, NULL);
+	inode_unlock(inode);
+	if (rc)
+		goto out;
+
 	/* Check it only calling from SD BUFFER context */
 	if (type_check && !(le16_to_cpu(pntsd->type) & DACL_PRESENT))
 		goto out;

fs/ksmbd/smbacl.h

@@ -209,4 +209,29 @@ int set_info_sec(struct ksmbd_conn *conn, struct ksmbd_tree_connect *tcon,
 		 bool type_check);
 void id_to_sid(unsigned int cid, uint sidtype, struct smb_sid *ssid);
 void ksmbd_init_domain(u32 *sub_auth);
+
+static inline uid_t posix_acl_uid_translate(struct user_namespace *mnt_userns,
+					    struct posix_acl_entry *pace)
+{
+	kuid_t kuid;
+
+	/* If this is an idmapped mount, apply the idmapping. */
+	kuid = kuid_into_mnt(mnt_userns, pace->e_uid);
+
+	/* Translate the kuid into a userspace id ksmbd would see. */
+	return from_kuid(&init_user_ns, kuid);
+}
+
+static inline gid_t posix_acl_gid_translate(struct user_namespace *mnt_userns,
+					    struct posix_acl_entry *pace)
+{
+	kgid_t kgid;
+
+	/* If this is an idmapped mount, apply the idmapping. */
+	kgid = kgid_into_mnt(mnt_userns, pace->e_gid);
+
+	/* Translate the kgid into a userspace id ksmbd would see. */
+	return from_kgid(&init_user_ns, kgid);
+}
+
 #endif /* _SMBACL_H */

fs/ksmbd/transport_rdma.c

@@ -1168,7 +1168,7 @@ static int smb_direct_post_send_data(struct smb_direct_transport *t,
 			pr_err("failed to map buffer\n");
 			ret = -ENOMEM;
 			goto err;
-		} else if (sg_cnt + msg->num_sge > SMB_DIRECT_MAX_SEND_SGES - 1) {
+		} else if (sg_cnt + msg->num_sge > SMB_DIRECT_MAX_SEND_SGES) {
 			pr_err("buffer not fitted into sges\n");
 			ret = -E2BIG;
 			ib_dma_unmap_sg(t->cm_id->device, sg, sg_cnt,

fs/ksmbd/vfs.c

@@ -69,14 +69,15 @@ static void ksmbd_vfs_inherit_owner(struct ksmbd_work *work,
  *
  * the reference count of @parent isn't incremented.
  */
-int ksmbd_vfs_lock_parent(struct dentry *parent, struct dentry *child)
+int ksmbd_vfs_lock_parent(struct user_namespace *user_ns, struct dentry *parent,
+			  struct dentry *child)
 {
 	struct dentry *dentry;
 	int ret = 0;
 
 	inode_lock_nested(d_inode(parent), I_MUTEX_PARENT);
-	dentry = lookup_one_len(child->d_name.name, parent,
-				child->d_name.len);
+	dentry = lookup_one(user_ns, child->d_name.name, parent,
+			    child->d_name.len);
 	if (IS_ERR(dentry)) {
 		ret = PTR_ERR(dentry);
 		goto out_err;
@@ -102,7 +103,7 @@ int ksmbd_vfs_may_delete(struct user_namespace *user_ns,
 	int ret;
 
 	parent = dget_parent(dentry);
-	ret = ksmbd_vfs_lock_parent(parent, dentry);
+	ret = ksmbd_vfs_lock_parent(user_ns, parent, dentry);
 	if (ret) {
 		dput(parent);
 		return ret;
@@ -137,7 +138,7 @@ int ksmbd_vfs_query_maximal_access(struct user_namespace *user_ns,
 		*daccess |= FILE_EXECUTE_LE;
 
 	parent = dget_parent(dentry);
-	ret = ksmbd_vfs_lock_parent(parent, dentry);
+	ret = ksmbd_vfs_lock_parent(user_ns, parent, dentry);
 	if (ret) {
 		dput(parent);
 		return ret;
@@ -197,6 +198,7 @@ int ksmbd_vfs_create(struct ksmbd_work *work, const char *name, umode_t mode)
  */
 int ksmbd_vfs_mkdir(struct ksmbd_work *work, const char *name, umode_t mode)
 {
+	struct user_namespace *user_ns;
 	struct path path;
 	struct dentry *dentry;
 	int err;
@@ -210,16 +212,16 @@ int ksmbd_vfs_mkdir(struct ksmbd_work *work, const char *name, umode_t mode)
 		return err;
 	}
 
+	user_ns = mnt_user_ns(path.mnt);
 	mode |= S_IFDIR;
-	err = vfs_mkdir(mnt_user_ns(path.mnt), d_inode(path.dentry),
-			dentry, mode);
+	err = vfs_mkdir(user_ns, d_inode(path.dentry), dentry, mode);
 	if (err) {
 		goto out;
 	} else if (d_unhashed(dentry)) {
 		struct dentry *d;
 
-		d = lookup_one_len(dentry->d_name.name, dentry->d_parent,
-				   dentry->d_name.len);
+		d = lookup_one(user_ns, dentry->d_name.name, dentry->d_parent,
+			       dentry->d_name.len);
 		if (IS_ERR(d)) {
 			err = PTR_ERR(d);
 			goto out;
@@ -582,6 +584,7 @@ int ksmbd_vfs_fsync(struct ksmbd_work *work, u64 fid, u64 p_id)
  */
 int ksmbd_vfs_remove_file(struct ksmbd_work *work, char *name)
 {
+	struct user_namespace *user_ns;
 	struct path path;
 	struct dentry *parent;
 	int err;
@@ -601,8 +604,9 @@ int ksmbd_vfs_remove_file(struct ksmbd_work *work, char *name)
 		return err;
 	}
 
+	user_ns = mnt_user_ns(path.mnt);
 	parent = dget_parent(path.dentry);
-	err = ksmbd_vfs_lock_parent(parent, path.dentry);
+	err = ksmbd_vfs_lock_parent(user_ns, parent, path.dentry);
 	if (err) {
 		dput(parent);
 		path_put(&path);
@@ -616,14 +620,12 @@ int ksmbd_vfs_remove_file(struct ksmbd_work *work, char *name)
 	}
 
 	if (S_ISDIR(d_inode(path.dentry)->i_mode)) {
-		err = vfs_rmdir(mnt_user_ns(path.mnt), d_inode(parent),
-				path.dentry);
+		err = vfs_rmdir(user_ns, d_inode(parent), path.dentry);
 		if (err && err != -ENOTEMPTY)
 			ksmbd_debug(VFS, "%s: rmdir failed, err %d\n", name,
 				    err);
 	} else {
-		err = vfs_unlink(mnt_user_ns(path.mnt), d_inode(parent),
-				 path.dentry, NULL);
+		err = vfs_unlink(user_ns, d_inode(parent), path.dentry, NULL);
 		if (err)
 			ksmbd_debug(VFS, "%s: unlink failed, err %d\n", name,
 				    err);
@@ -748,7 +750,8 @@ static int __ksmbd_vfs_rename(struct ksmbd_work *work,
 	if (ksmbd_override_fsids(work))
 		return -ENOMEM;
 
-	dst_dent = lookup_one_len(dst_name, dst_dent_parent, strlen(dst_name));
+	dst_dent = lookup_one(dst_user_ns, dst_name, dst_dent_parent,
+			      strlen(dst_name));
 	err = PTR_ERR(dst_dent);
 	if (IS_ERR(dst_dent)) {
 		pr_err("lookup failed %s [%d]\n", dst_name, err);
@@ -779,6 +782,7 @@ static int __ksmbd_vfs_rename(struct ksmbd_work *work,
 int ksmbd_vfs_fp_rename(struct ksmbd_work *work, struct ksmbd_file *fp,
 			char *newname)
 {
+	struct user_namespace *user_ns;
 	struct path dst_path;
 	struct dentry *src_dent_parent, *dst_dent_parent;
 	struct dentry *src_dent, *trap_dent, *src_child;
@@ -808,8 +812,9 @@ int ksmbd_vfs_fp_rename(struct ksmbd_work *work, struct ksmbd_file *fp,
 	trap_dent = lock_rename(src_dent_parent, dst_dent_parent);
 	dget(src_dent);
 	dget(dst_dent_parent);
-	src_child = lookup_one_len(src_dent->d_name.name, src_dent_parent,
-				   src_dent->d_name.len);
+	user_ns = file_mnt_user_ns(fp->filp);
+	src_child = lookup_one(user_ns, src_dent->d_name.name, src_dent_parent,
+			       src_dent->d_name.len);
 	if (IS_ERR(src_child)) {
 		err = PTR_ERR(src_child);
 		goto out_lock;
@@ -823,7 +828,7 @@ int ksmbd_vfs_fp_rename(struct ksmbd_work *work, struct ksmbd_file *fp,
 	dput(src_child);
 
 	err = __ksmbd_vfs_rename(work,
-				 file_mnt_user_ns(fp->filp),
+				 user_ns,
 				 src_dent_parent,
 				 src_dent,
 				 mnt_user_ns(dst_path.mnt),
@@ -1109,7 +1114,7 @@ int ksmbd_vfs_unlink(struct user_namespace *user_ns,
 {
 	int err = 0;
 
-	err = ksmbd_vfs_lock_parent(dir, dentry);
+	err = ksmbd_vfs_lock_parent(user_ns, dir, dentry);
 	if (err)
 		return err;
 	dget(dentry);
@@ -1385,14 +1390,14 @@ static struct xattr_smb_acl *ksmbd_vfs_make_xattr_posix_acl(struct user_namespac
 		switch (pa_entry->e_tag) {
 		case ACL_USER:
 			xa_entry->type = SMB_ACL_USER;
-			xa_entry->uid = from_kuid(user_ns, pa_entry->e_uid);
+			xa_entry->uid = posix_acl_uid_translate(user_ns, pa_entry);
 			break;
 		case ACL_USER_OBJ:
 			xa_entry->type = SMB_ACL_USER_OBJ;
 			break;
 		case ACL_GROUP:
 			xa_entry->type = SMB_ACL_GROUP;
-			xa_entry->gid = from_kgid(user_ns, pa_entry->e_gid);
+			xa_entry->gid = posix_acl_gid_translate(user_ns, pa_entry);
 			break;
 		case ACL_GROUP_OBJ:
 			xa_entry->type = SMB_ACL_GROUP_OBJ;

fs/ksmbd/vfs.h

@@ -107,7 +107,8 @@ struct ksmbd_kstat {
 	__le32			file_attributes;
 };
 
-int ksmbd_vfs_lock_parent(struct dentry *parent, struct dentry *child);
+int ksmbd_vfs_lock_parent(struct user_namespace *user_ns, struct dentry *parent,
+			  struct dentry *child);
 int ksmbd_vfs_may_delete(struct user_namespace *user_ns, struct dentry *dentry);
 int ksmbd_vfs_query_maximal_access(struct user_namespace *user_ns,
 				   struct dentry *dentry, __le32 *daccess);

fs/ksmbd/vfs_cache.c

@@ -666,22 +666,6 @@ void ksmbd_free_global_file_table(void)
 	ksmbd_destroy_file_table(&global_ft);
 }
 
-int ksmbd_file_table_flush(struct ksmbd_work *work)
-{
-	struct ksmbd_file	*fp = NULL;
-	unsigned int		id;
-	int			ret;
-
-	read_lock(&work->sess->file_table.lock);
-	idr_for_each_entry(work->sess->file_table.idr, fp, id) {
-		ret = ksmbd_vfs_fsync(work, fp->volatile_id, KSMBD_NO_FID);
-		if (ret)
-			break;
-	}
-	read_unlock(&work->sess->file_table.lock);
-	return ret;
-}
-
 int ksmbd_init_file_table(struct ksmbd_file_table *ft)
 {
 	ft->idr = kzalloc(sizeof(struct idr), GFP_KERNEL);

fs/ksmbd/vfs_cache.h

@@ -152,7 +152,6 @@ void ksmbd_close_session_fds(struct ksmbd_work *work);
 int ksmbd_close_inode_fds(struct ksmbd_work *work, struct inode *inode);
 int ksmbd_init_global_file_table(void);
 void ksmbd_free_global_file_table(void);
-int ksmbd_file_table_flush(struct ksmbd_work *work);
 void ksmbd_set_fd_limit(unsigned long limit);
 
 /*