dmstats: replace --force with new stats-specific --alldevices

The '--force' switch is only used by dmstats to allow either
creation or deletion of one or more regions on all devices.

These operations do not carry any risk: just a possible mess of
region IDs to be cleaned up.

Remove the use of '--force' for stats commands and change current
uses to a new '--alldevices' switch.

WHATS_NEW_DM

@@ -1,6 +1,7 @@
 Version 1.02.105 - 
 ===================================
   Add more arg validation for dm_tree_node_add_cache_target().
+  Add --alldevices switch to replace use of --force for stats create / delete.
 
 Version 1.02.104 - 10th August 2015
 ===================================

man/dmstats.8.in

@@ -27,6 +27,7 @@ dmstats \(em device-mapper statistics management
 .br
 .B dmstats create
 .I device_name
+.RB [ \-\-alldevices ]
 .RB [[ \-\-areas
 .IR nr_areas ]
 .RB |[ \-\-areasize
@@ -43,7 +44,7 @@ dmstats \(em device-mapper statistics management
 .br
 .B dmstats delete
 .I device_name
-.RB [ \-\-force ]
+.RB [ \-\-alldevices ]
 .RB [ \-\-allregions
 .RB | \-\-regionid
 .IR id ]
@@ -115,10 +116,14 @@ when run as 'dmsetup stats'.
 
 When no device argument is given dmstats will by default operate on all
 device-mapper devices present. The \fBcreate\fP and \fBdelete\fP
-commands require the use of \fB--force\fP when used in this way.
+commands require the use of \fB--alldevices\fP when used in this way.
 
 .SH OPTIONS
 .TP
+.B \-\-alldevices
+If no device arguments are given allow operation on all devices when
+creating or deleting regions.
+.TP
 .B \-\-allprograms
 Include regions from all program IDs for list and report operations.
 .TP
@@ -267,7 +272,7 @@ stdout.
 .TP
 .B delete
 .I [ device_name ]
-.RB [ \-\-force ]
+.RB [ \-\-alldevices ]
 .RB [ \-\-allregions
 .RB | \-\-regionid
 .IR id ]
@@ -282,7 +287,8 @@ of subsequent list, print, or report operations.
 All regions registered on a device may be removed using
 \fB\-\-allregions\fP.
 
-To remove all regions on all devices \fB\-\-force\fP must be used.
+To remove all regions on all devices both \fB--allregions\fP and
+\fB\-\-alldevices\fP must be used.
 .br
 .TP
 .B help
@@ -601,7 +607,7 @@ Created region: 0
 Delete all regions on all devices
 .br
 .br
-# dmstats delete --allregions --force
+# dmstats delete --alldevices --allregions
 .br
 .br
 

tools/dmsetup.c

@@ -120,6 +120,7 @@ enum {
 	READ_ONLY = 0,
 	ADD_NODE_ON_CREATE_ARG,
 	ADD_NODE_ON_RESUME_ARG,
+	ALL_DEVICES_ARG,
 	ALL_PROGRAMS_ARG,
 	ALL_REGIONS_ARG,
 	AREAS_ARG,
@@ -4418,9 +4419,9 @@ static int _stats_create(CMD_ARGS)
 		name = names->name;
 	else {
 		if (argc == 1 && !_switches[UUID_ARG] && !_switches[MAJOR_ARG]) {
-			if (!_switches[FORCE_ARG]) {
+			if (!_switches[ALL_DEVICES_ARG]) {
-				log_error("Creating regions on all devices "
+				log_error("Please specify device(s) or use "
-					  "requires --force.");
+					  "--alldevices.");
 				return 0;
 			}
 			return _process_all(cmd, subcommand, argc, argv, 0, _stats_create);
@@ -4506,9 +4507,9 @@ static int _stats_delete(CMD_ARGS)
 		name = names->name;
 	else {
 		if (argc == 1 && !_switches[UUID_ARG] && !_switches[MAJOR_ARG]) {
-			if (!_switches[FORCE_ARG]) {
+			if (!_switches[ALL_DEVICES_ARG]) {
-				log_error("Deleting regions from all devices "
+				log_error("Please specify device(s) or use "
-					  "requires --force.");
+					  "--alldevices.");
 				return 0;
 			}
 			return _process_all(cmd, subcommand, argc, argv, 0, _stats_delete);
@@ -5355,6 +5356,7 @@ static int _process_switches(int *argcp, char ***argvp, const char *dev_dir)
 #ifdef HAVE_GETOPTLONG
 	static struct option long_options[] = {
 		{"readonly", 0, &ind, READ_ONLY},
+		{"alldevices", 0, &ind, ALL_DEVICES_ARG},
 		{"allprograms", 0, &ind, ALL_PROGRAMS_ARG},
 		{"allregions", 0, &ind, ALL_REGIONS_ARG},
 		{"areas", 1, &ind, AREAS_ARG},
@@ -5479,6 +5481,8 @@ static int _process_switches(int *argcp, char ***argvp, const char *dev_dir)
 	optind = OPTIND_INIT;
 	while ((ind = -1, c = GETOPTLONG_FN(*argcp, *argvp, "cCfG:hj:m:M:no:O:rS:u:U:vy",
 					    long_options, NULL)) != -1) {
+		if (ind == ALL_DEVICES_ARG)
+			_switches[ALL_DEVICES_ARG]++;
 		if (ind == ALL_PROGRAMS_ARG)
 			_switches[ALL_PROGRAMS_ARG]++;
 		if (ind == ALL_REGIONS_ARG)