LVM2/tools vgrename.c

LVM2/tools vgrename.c

[wysochanski]

CVSROOT:	/cvs/lvm2
Module name:	LVM2
Changes by:	wysochanski@sourceware.org	2009-09-02 21:29:23

Modified files:
	tools          : vgrename.c 

Log message:
	Refactor vgrename into vg_rename_old and vg_rename_new.
	
	Should be no functional change.
	Will allow us to reorder lock obtaining if needed.
	
	Author: Dave Wysochanski <dwysocha@redhat.com>

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/tools/vgrename.c.diff?cvsroot=lvm2&r1=1.65&r2=1.66

--- LVM2/tools/vgrename.c	2009/07/07 01:18:35	1.65
+++ LVM2/tools/vgrename.c	2009/09/02 21:29:23	1.66
@@ -1,6 +1,6 @@
 /*
  * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
- * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2004-2009 Red Hat, Inc. All rights reserved.
  *
  * This file is part of LVM2.
  *
@@ -15,6 +15,52 @@
 
 #include "tools.h"
 
+static struct volume_group *vg_rename_old(struct cmd_context *cmd,
+					  const char *vg_name_old,
+					  const char *vgid)
+{
+	struct volume_group *vg;
+
+	/* FIXME we used to print an error about EXPORTED, but proceeded
+	   nevertheless. */
+	vg = vg_read_for_update(cmd, vg_name_old, vgid, READ_ALLOW_EXPORTED);
+	if (vg_read_error(vg)) {
+		vg_release(vg);
+		return_NULL;
+	}
+
+	if (lvs_in_vg_activated_by_uuid_only(vg)) {
+		unlock_and_release_vg(cmd, vg, vg_name_old);
+		log_error("Volume group \"%s\" still has active LVs",
+			  vg_name_old);
+		/* FIXME Remove this restriction */
+		return NULL;
+	}
+	return vg;
+}
+
+static int vg_rename_new(struct cmd_context *cmd,
+			 const char *vg_name_new)
+{
+	int rc;
+
+	log_verbose("Checking for new volume group \"%s\"", vg_name_new);
+
+	rc = vg_lock_newname(cmd, vg_name_new);
+
+	if (rc == FAILED_LOCKING) {
+		log_error("Can't get lock for %s", vg_name_new);
+		return 0;
+	}
+
+	if (rc == FAILED_EXIST) {
+		log_error("New volume group \"%s\" already exists",
+			  vg_name_new);
+		return 0;
+	}
+	return 1;
+}
+
 static int vg_rename_path(struct cmd_context *cmd, const char *old_vg_path,
 			  const char *new_vg_path)
 {
@@ -70,35 +116,11 @@
 	} else
 		vgid = NULL;
 
-	/* FIXME we used to print an error about EXPORTED, but proceeded
-	   nevertheless. */
-	vg = vg_read_for_update(cmd, vg_name_old, vgid, READ_ALLOW_EXPORTED);
-	if (vg_read_error(vg)) {
-		vg_release(vg);
-		return_0;
-	}
-
-	if (lvs_in_vg_activated_by_uuid_only(vg)) {
-		unlock_and_release_vg(cmd, vg, vg_name_old);
-		log_error("Volume group \"%s\" still has active LVs",
-			  vg_name_old);
-		/* FIXME Remove this restriction */
+	vg = vg_rename_old(cmd, vg_name_old, vgid);
+	if (!vg)
 		return 0;
-	}
-
-	log_verbose("Checking for new volume group \"%s\"", vg_name_new);
-
-	rc = vg_lock_newname(cmd, vg_name_new);
 
-	if (rc == FAILED_LOCKING) {
-		unlock_and_release_vg(cmd, vg, vg_name_old);
-		log_error("Can't get lock for %s", vg_name_new);
-		return 0;
-	}
-
-	if (rc == FAILED_EXIST) {
-		log_error("New volume group \"%s\" already exists",
-			  vg_name_new);
+	if (!vg_rename_new(cmd, vg_name_new)) {
 		unlock_and_release_vg(cmd, vg, vg_name_old);
 		return 0;
 	}
@@ -168,7 +190,7 @@
 
 	if (!vg_rename_path(cmd, argv[0], argv[1]))
 		return ECMD_FAILED;
-	
+
 	return ECMD_PROCESSED;
 }
 

LVM2/tools vgrename.c

[wysochanski]

CVSROOT:	/cvs/lvm2
Module name:	LVM2
Changes by:	wysochanski@sourceware.org	2009-09-02 21:29:40

Modified files:
	tools          : vgrename.c 

Log message:
	Update vgrename to take into account vgname lock ordering.
	
	Should be no functional change.
	
	Author: Dave Wysochanski <dwysocha@redhat.com>

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/tools/vgrename.c.diff?cvsroot=lvm2&r1=1.66&r2=1.67

--- LVM2/tools/vgrename.c	2009/09/02 21:29:23	1.66
+++ LVM2/tools/vgrename.c	2009/09/02 21:29:40	1.67
@@ -74,7 +74,7 @@
 	const char *vgid = NULL, *vg_name, *vg_name_old;
 	char old_path[NAME_LEN], new_path[NAME_LEN];
 	struct volume_group *vg = NULL;
-	uint32_t rc;
+	int lock_vg_old_first = 1;
 
 	vg_name_old = skip_dev_dir(cmd, old_vg_path, NULL);
 	vg_name_new = skip_dev_dir(cmd, new_vg_path, NULL);
@@ -116,13 +116,26 @@
 	} else
 		vgid = NULL;
 
-	vg = vg_rename_old(cmd, vg_name_old, vgid);
-	if (!vg)
-		return 0;
+	if (strcmp(vg_name_new, vg_name_old) < 0)
+		lock_vg_old_first = 0;
 
-	if (!vg_rename_new(cmd, vg_name_new)) {
-		unlock_and_release_vg(cmd, vg, vg_name_old);
-		return 0;
+	if (lock_vg_old_first) {
+		vg = vg_rename_old(cmd, vg_name_old, vgid);
+		if (!vg)
+			return 0;
+
+		if (!vg_rename_new(cmd, vg_name_new)) {
+			unlock_and_release_vg(cmd, vg, vg_name_old);
+			return 0;
+		}
+	} else {
+		if (!vg_rename_new(cmd, vg_name_new)) {
+			return 0;
+		}
+
+		vg = vg_rename_old(cmd, vg_name_old, vgid);
+		if (!vg)
+			return 0;
 	}
 
 	if (!archive(vg))
@@ -176,8 +189,13 @@
 	return 1;
 
       error:
-	unlock_vg(cmd, vg_name_new);
-	unlock_and_release_vg(cmd, vg, vg_name_old);
+	if (lock_vg_old_first) {
+		unlock_vg(cmd, vg_name_new);
+		unlock_and_release_vg(cmd, vg, vg_name_old);
+	} else {
+		unlock_and_release_vg(cmd, vg, vg_name_old);
+		unlock_vg(cmd, vg_name_new);
+	}
 	return 0;
 }
 

LVM2/tools vgrename.c

[wysochanski]

CVSROOT:	/cvs/lvm2
Module name:	LVM2
Changes by:	wysochanski@sourceware.org	2009-07-01 17:02:18

Modified files:
	tools          : vgrename.c 

Log message:
	Convert vgrename to vg_read_for_update.
	
	Sun May  3 12:54:28 CEST 2009  Petr Rockai <me@mornfall.net>
	* Convert vgrename to vg_read_for_update.
	
	Rebased 6/26/2009 - Dave W.
	
	Author: Petr Rockai <prockai@redhat.com>
	Committer: Dave Wysochanski <dwysocha@redhat.com>

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/tools/vgrename.c.diff?cvsroot=lvm2&r1=1.63&r2=1.64

--- LVM2/tools/vgrename.c	2009/06/09 14:30:16	1.63
+++ LVM2/tools/vgrename.c	2009/07/01 17:02:18	1.64
@@ -20,7 +20,6 @@
 {
 	char *dev_dir;
 	struct id id;
-	int consistent = 1;
 	int match = 0;
 	int found_id = 0;
 	struct dm_list *vgids;
@@ -71,25 +70,11 @@
 	} else
 		vgid = NULL;
 
-	if (!lock_vol(cmd, vg_name_old, LCK_VG_WRITE)) {
-		log_error("Can't get lock for %s", vg_name_old);
-		return 0;
-	}
-
-	if (!(vg = vg_read_internal(cmd, vg_name_old, vgid, &consistent)) || !consistent) {
-		log_error("Volume group %s %s%s%snot found.", vg_name_old,
-		vgid ? "(" : "", vgid ? vgid : "", vgid ? ") " : "");
-		unlock_vg(cmd, vg_name_old);
-		return 0;
-	}
-
-	if (!vg_check_status(vg, CLUSTERED | LVM_WRITE)) {
-		unlock_and_release_vg(cmd, vg, vg_name_old);
-		return 0;
-	}
-
-	/* Don't return failure for EXPORTED_VG */
-	vg_check_status(vg, EXPORTED_VG);
+	/* FIXME we used to print an error about EXPORTED, but proceeded
+	   nevertheless. */
+	vg = vg_read_for_update(cmd, vg_name_old, vgid, READ_ALLOW_EXPORTED);
+	if (vg_read_error(vg))
+		return_0;
 
 	if (lvs_in_vg_activated_by_uuid_only(vg)) {
 		unlock_and_release_vg(cmd, vg, vg_name_old);

LVM2/tools vgrename.c

[wysochanski]

CVSROOT:	/cvs/lvm2
Module name:	LVM2
Changes by:	wysochanski@sourceware.org	2009-06-09 14:30:16

Modified files:
	tools          : vgrename.c 

Log message:
	Update vgrename to use vg_lock_newname.

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/tools/vgrename.c.diff?cvsroot=lvm2&r1=1.62&r2=1.63

--- LVM2/tools/vgrename.c	2009/05/21 03:04:54	1.62
+++ LVM2/tools/vgrename.c	2009/06/09 14:30:16	1.63
@@ -28,7 +28,8 @@
 	char *vg_name_new;
 	const char *vgid = NULL, *vg_name, *vg_name_old;
 	char old_path[NAME_LEN], new_path[NAME_LEN];
-	struct volume_group *vg = NULL, *vg_new = NULL;
+	struct volume_group *vg = NULL;
+	uint32_t rc;
 
 	vg_name_old = skip_dev_dir(cmd, old_vg_path, NULL);
 	vg_name_new = skip_dev_dir(cmd, new_vg_path, NULL);
@@ -100,17 +101,19 @@
 
 	log_verbose("Checking for new volume group \"%s\"", vg_name_new);
 
-	if (!lock_vol(cmd, vg_name_new, LCK_VG_WRITE)) {
+	rc = vg_lock_newname(cmd, vg_name_new);
+
+	if (rc == FAILED_LOCKING) {
 		unlock_and_release_vg(cmd, vg, vg_name_old);
 		log_error("Can't get lock for %s", vg_name_new);
 		return 0;
 	}
 
-	consistent = 0;
-	if ((vg_new = vg_read_internal(cmd, vg_name_new, NULL, &consistent))) {
+	if (rc == FAILED_EXIST) {
 		log_error("New volume group \"%s\" already exists",
 			  vg_name_new);
-		goto error;
+		unlock_and_release_vg(cmd, vg, vg_name_old);
+		return 0;
 	}
 
 	if (!archive(vg))
@@ -151,7 +154,7 @@
 	backup(vg);
 	backup_remove(cmd, vg_name_old);
 
-	unlock_and_release_vg(cmd, vg_new, vg_name_new);
+	unlock_vg(cmd, vg_name_new);
 	unlock_and_release_vg(cmd, vg, vg_name_old);
 
 	log_print("Volume group \"%s\" successfully renamed to \"%s\"",
@@ -164,7 +167,7 @@
 	return 1;
 
       error:
-	unlock_and_release_vg(cmd, vg_new, vg_name_new);
+	unlock_vg(cmd, vg_name_new);
 	unlock_and_release_vg(cmd, vg, vg_name_old);
 	return 0;
 }

LVM2/tools vgrename.c

[agk]

CVSROOT:	/cvs/lvm2
Module name:	LVM2
Changes by:	agk@sourceware.org	2008-06-06 16:13:40

Modified files:
	tools          : vgrename.c 

Log message:
	cache dropping needs to use old name not new
	rename variable to reduce confusion

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/tools/vgrename.c.diff?cvsroot=lvm2&r1=1.53&r2=1.54

--- LVM2/tools/vgrename.c	2008/06/06 13:04:43	1.53
+++ LVM2/tools/vgrename.c	2008/06/06 16:13:35	1.54
@@ -28,7 +28,7 @@
 	char *vg_name_new;
 	const char *vgid = NULL, *vg_name, *vg_name_old;
 	char old_path[NAME_LEN], new_path[NAME_LEN];
-	struct volume_group *vg_old, *vg_new;
+	struct volume_group *vg, *vg_new;
 
 	vg_name_old = skip_dev_dir(cmd, old_vg_path, NULL);
 	vg_name_new = skip_dev_dir(cmd, new_vg_path, NULL);
@@ -75,22 +75,22 @@
 		return 0;
 	}
 
-	if (!(vg_old = vg_read(cmd, vg_name_old, vgid, &consistent)) || !consistent) {
+	if (!(vg = vg_read(cmd, vg_name_old, vgid, &consistent)) || !consistent) {
 		log_error("Volume group %s %s%s%snot found.", vg_name_old,
 		vgid ? "(" : "", vgid ? vgid : "", vgid ? ") " : "");
 		unlock_vg(cmd, vg_name_old);
 		return 0;
 	}
 
-	if (!vg_check_status(vg_old, CLUSTERED | LVM_WRITE)) {
+	if (!vg_check_status(vg, CLUSTERED | LVM_WRITE)) {
 		unlock_vg(cmd, vg_name_old);
 		return 0;
 	}
 
 	/* Don't return failure for EXPORTED_VG */
-	vg_check_status(vg_old, EXPORTED_VG);
+	vg_check_status(vg, EXPORTED_VG);
 
-	if (lvs_in_vg_activated_by_uuid_only(vg_old)) {
+	if (lvs_in_vg_activated_by_uuid_only(vg)) {
 		unlock_vg(cmd, vg_name_old);
 		log_error("Volume group \"%s\" still has active LVs",
 			  vg_name_old);
@@ -113,11 +113,14 @@
 		goto error;
 	}
 
-	if (!archive(vg_old))
+	if (!archive(vg))
 		goto error;
 
+	/* Remove references based on old name */
+	drop_cached_metadata(vg);
+
 	/* Change the volume group name */
-	vg_rename(cmd, vg_old, vg_name_new);
+	vg_rename(cmd, vg, vg_name_new);
 
 	sprintf(old_path, "%s%s", dev_dir, vg_name_old);
 	sprintf(new_path, "%s%s", dev_dir, vg_name_new);
@@ -133,17 +136,15 @@
 		}
 	}
 
-	drop_cached_metadata(vg_old);
-
 	/* store it on disks */
 	log_verbose("Writing out updated volume group");
-	if (!vg_write(vg_old) || !vg_commit(vg_old)) {
+	if (!vg_write(vg) || !vg_commit(vg)) {
 		goto error;
 	}
 
 /******* FIXME Rename any active LVs! *****/
 
-	backup(vg_old);
+	backup(vg);
 
 	unlock_vg(cmd, vg_name_new);
 	unlock_vg(cmd, vg_name_old);

LVM2/tools vgrename.c

[wysochanski]

CVSROOT:	/cvs/lvm2
Module name:	LVM2
Changes by:	wysochanski@sourceware.org	2007-08-31 19:09:50

Modified files:
	tools          : vgrename.c 

Log message:
	prepare to move guts of vgrename into library function

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/tools/vgrename.c.diff?cvsroot=lvm2&r1=1.45&r2=1.46

--- LVM2/tools/vgrename.c	2007/08/20 20:55:30	1.45
+++ LVM2/tools/vgrename.c	2007/08/31 19:09:49	1.46
@@ -15,7 +15,8 @@
 
 #include "tools.h"
 
-int vgrename(struct cmd_context *cmd, int argc, char **argv)
+static int vg_rename_path(struct cmd_context *cmd, const char *old_vg_path,
+			  const char *new_vg_path)
 {
 	char *dev_dir;
 	unsigned length;
@@ -30,13 +31,8 @@
 	char old_path[NAME_LEN], new_path[NAME_LEN];
 	struct volume_group *vg_old, *vg_new;
 
-	if (argc != 2) {
-		log_error("Old and new volume group names need specifying");
-		return EINVALID_CMD_LINE;
-	}
-
-	vg_name_old = skip_dev_dir(cmd, argv[0], NULL);
-	vg_name_new = skip_dev_dir(cmd, argv[1], NULL);
+	vg_name_old = skip_dev_dir(cmd, old_vg_path, NULL);
+	vg_name_new = skip_dev_dir(cmd, new_vg_path, NULL);
 
 	dev_dir = cmd->dev_dir;
 	length = strlen(dev_dir);
@@ -45,18 +41,18 @@
 	if (strlen(vg_name_new) > NAME_LEN - length - 2) {
 		log_error("New volume group path exceeds maximum length "
 			  "of %d!", NAME_LEN - length - 2);
-		return ECMD_FAILED;
+		return 0;
 	}
 
 	if (!validate_vg_name(cmd, vg_name_new)) {
 		log_error("New volume group name \"%s\" is invalid",
 			  vg_name_new);
-		return ECMD_FAILED;
+		return 0;
 	}
 
 	if (!strcmp(vg_name_old, vg_name_new)) {
 		log_error("Old and new volume group names must differ");
-		return ECMD_FAILED;
+		return 0;
 	}
 
 	log_verbose("Checking for existing volume group \"%s\"", vg_name_old);
@@ -64,7 +60,7 @@
 	/* Avoid duplicates */
 	if (!(vgids = get_vgids(cmd, 0)) || list_empty(vgids)) {
 		log_error("No complete volume groups found");
-		return ECMD_FAILED;
+		return 0;
 	}
 
 	list_iterate_items(sl, vgids) {
@@ -75,7 +71,7 @@
 			if (match) {
 				log_error("Found more than one VG called %s. "
 					  "Please supply VG uuid.", vg_name_old);
-				return ECMD_FAILED;
+				return 0;
 			}
 			match = 1;
 		}
@@ -92,19 +88,19 @@
 
 	if (!lock_vol(cmd, vg_name_old, LCK_VG_WRITE)) {
 		log_error("Can't get lock for %s", vg_name_old);
-		return ECMD_FAILED;
+		return 0;
 	}
 
 	if (!(vg_old = vg_read(cmd, vg_name_old, vgid, &consistent)) || !consistent) {
 		log_error("Volume group %s %s%s%snot found.", vg_name_old,
 		vgid ? "(" : "", vgid ? vgid : "", vgid ? ") " : "");
 		unlock_vg(cmd, vg_name_old);
-		return ECMD_FAILED;
+		return 0;
 	}
 
 	if (!vg_check_status(vg_old, CLUSTERED | LVM_WRITE)) {
 		unlock_vg(cmd, vg_name_old);
-		return ECMD_FAILED;
+		return 0;
 	}
 
 	/* Don't return failure for EXPORTED_VG */
@@ -115,7 +111,7 @@
 		log_error("Volume group \"%s\" still has active LVs",
 			  vg_name_old);
 		/* FIXME Remove this restriction */
-		return ECMD_FAILED;
+		return 0;
 	}
 
 	log_verbose("Checking for new volume group \"%s\"", vg_name_new);
@@ -123,7 +119,7 @@
 	if (!lock_vol(cmd, vg_name_new, LCK_VG_WRITE | LCK_NONBLOCK)) {
 		unlock_vg(cmd, vg_name_old);
 		log_error("Can't get lock for %s", vg_name_new);
-		return ECMD_FAILED;
+		return 0;
 	}
 
 	consistent = 0;
@@ -173,11 +169,24 @@
         persistent_filter_wipe(cmd->filter);
         lvmcache_destroy();
 
-	return ECMD_PROCESSED;
+	return 1;
 
       error:
 	unlock_vg(cmd, vg_name_new);
 	unlock_vg(cmd, vg_name_old);
-	return ECMD_FAILED;
+	return 0;
+}
+
+int vgrename(struct cmd_context *cmd, int argc, char **argv)
+{
+	if (argc != 2) {
+		log_error("Old and new volume group names need specifying");
+		return EINVALID_CMD_LINE;
+	}
+
+	if (!vg_rename_path(cmd, argv[0], argv[1]))
+		return ECMD_FAILED;
+	
+	return ECMD_PROCESSED;
 }