add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/dlm/lockspace.c
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@@ -1,12 +1,10 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /******************************************************************************
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 *******************************************************************************
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 **
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 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
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 **  Copyright (C) 2004-2011 Red Hat, Inc.  All rights reserved.
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 **
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-**  This copyrighted material is made available to anyone wishing to use,
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-**  modify, copy, or redistribute it subject to the terms and conditions
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-**  of the GNU General Public License v.2.
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 **
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 *******************************************************************************
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 ******************************************************************************/
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@@ -160,6 +158,7 @@
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 	&dlm_attr_recover_nodeid.attr,
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 	NULL,
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 };
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+ATTRIBUTE_GROUPS(dlm);
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 static ssize_t dlm_attr_show(struct kobject *kobj, struct attribute *attr,
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 			     char *buf)
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@@ -189,7 +188,7 @@
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 };
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 static struct kobj_type dlm_ktype = {
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-	.default_attrs = dlm_attrs,
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+	.default_groups = dlm_groups,
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 	.sysfs_ops     = &dlm_attr_ops,
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 	.release       = lockspace_kobj_release,
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 };
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@@ -198,8 +197,6 @@
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 static int do_uevent(struct dlm_ls *ls, int in)
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 {
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-	int error;
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-
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 	if (in)
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 		kobject_uevent(&ls->ls_kobj, KOBJ_ONLINE);
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 	else
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@@ -210,20 +207,12 @@
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 	/* dlm_controld will see the uevent, do the necessary group management
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 	   and then write to sysfs to wake us */
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-	error = wait_event_interruptible(ls->ls_uevent_wait,
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-			test_and_clear_bit(LSFL_UEVENT_WAIT, &ls->ls_flags));
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+	wait_event(ls->ls_uevent_wait,
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+		   test_and_clear_bit(LSFL_UEVENT_WAIT, &ls->ls_flags));
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-	log_rinfo(ls, "group event done %d %d", error, ls->ls_uevent_result);
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+	log_rinfo(ls, "group event done %d", ls->ls_uevent_result);
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-	if (error)
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-		goto out;
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-
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-	error = ls->ls_uevent_result;
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- out:
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-	if (error)
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-		log_error(ls, "group %s failed %d %d", in ? "join" : "leave",
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-			  error, ls->ls_uevent_result);
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-	return error;
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+	return ls->ls_uevent_result;
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 }
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 static int dlm_uevent(struct kset *kset, struct kobject *kobj,
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@@ -431,7 +420,7 @@
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 	int do_unreg = 0;
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 	int namelen = strlen(name);
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-	if (namelen > DLM_LOCKSPACE_LEN)
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+	if (namelen > DLM_LOCKSPACE_LEN || namelen == 0)
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 		return -EINVAL;
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 	if (!lvblen || (lvblen % 8))
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@@ -681,10 +670,8 @@
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  out_lkbidr:
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 	idr_destroy(&ls->ls_lkbidr);
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  out_rsbtbl:
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-	for (i = 0; i < DLM_REMOVE_NAMES_MAX; i++) {
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-		if (ls->ls_remove_names[i])
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-			kfree(ls->ls_remove_names[i]);
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-	}
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+	for (i = 0; i < DLM_REMOVE_NAMES_MAX; i++)
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+		kfree(ls->ls_remove_names[i]);
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 	vfree(ls->ls_rsbtbl);
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  out_lsfree:
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 	if (do_unreg)