pvs: replace 'unknown device' with [unknown]

A config setting can restore the old string.

lib/commands/toolcontext.c

@@ -675,6 +675,9 @@ static int _process_config(struct cmd_context *cmd)
 	if (!process_profilable_config(cmd))
 		return_0;
 
+	if (find_config_tree_bool(cmd, report_two_word_unknown_device_CFG, NULL))
+		init_unknown_device_name("unknown device");
+
 	init_detect_internal_vg_cache_corruption
 		(find_config_tree_bool(cmd, global_detect_internal_vg_cache_corruption_CFG, NULL));
 

lib/config/config_settings.h

@@ -1682,6 +1682,10 @@ cfg(report_pvsegs_cols_verbose_CFG, "pvsegs_cols_verbose", report_CFG_SECTION, C
 cfg(report_mark_hidden_devices_CFG, "mark_hidden_devices", report_CFG_SECTION, CFG_PROFILABLE | CFG_DEFAULT_COMMENTED, CFG_TYPE_BOOL, 1, vsn(2, 2, 140), NULL, 0, NULL,
 	"Use brackets [] to mark hidden devices.\n")
 
+cfg(report_two_word_unknown_device_CFG, "two_word_unknown_device", report_CFG_SECTION, CFG_DEFAULT_COMMENTED, CFG_TYPE_BOOL, 0, vsn(2, 2, 146), NULL, 0, NULL,
+	"Use the two words 'unknown device' in place of '[unknown]'.\n"
+	"This is displayed when the device for a PV is not known.\n")
+
 cfg(dmeventd_mirror_library_CFG, "mirror_library", dmeventd_CFG_SECTION, 0, CFG_TYPE_STRING, DEFAULT_DMEVENTD_MIRROR_LIB, vsn(1, 2, 3), NULL, 0, NULL,
 	"The library dmeventd uses when monitoring a mirror device.\n"
 	"libdevmapper-event-lvm2mirror.so attempts to recover from\n"

lib/config/defaults.h

@@ -56,6 +56,7 @@
 #define DEFAULT_USE_MLOCKALL 0
 #define DEFAULT_METADATA_READ_ONLY 0
 #define DEFAULT_LVDISPLAY_SHOWS_FULL_DEVICE_PATH 0
+#define DEFAULT_UNKNOWN_DEVICE_NAME "[unknown]"
 
 #define DEFAULT_SANLOCK_LV_EXTEND_MB 256
 

lib/device/dev-cache.c

@@ -1108,5 +1108,5 @@ int dev_fd(struct device *dev)
 const char *dev_name(const struct device *dev)
 {
 	return (dev && dev->aliases.n) ? dm_list_item(dev->aliases.n, struct dm_str_list)->str :
-	    "unknown device";
+	    unknown_device_name();
 }

lib/misc/lvm-globals.c

@@ -55,6 +55,7 @@ static int _dev_disable_after_error_count = DEFAULT_DISABLE_AFTER_ERROR_COUNT;
 static uint64_t _pv_min_size = (DEFAULT_PV_MIN_SIZE_KB * 1024L >> SECTOR_SHIFT);
 static int _detect_internal_vg_cache_corruption =
 	DEFAULT_DETECT_INTERNAL_VG_CACHE_CORRUPTION;
+static const char *_unknown_device_name = DEFAULT_UNKNOWN_DEVICE_NAME;
 
 void init_verbose(int level)
 {
@@ -379,3 +380,14 @@ int detect_internal_vg_cache_corruption(void)
 {
 	return _detect_internal_vg_cache_corruption;
 }
+
+const char *unknown_device_name(void)
+{
+	return _unknown_device_name;
+}
+
+void init_unknown_device_name(const char *name)
+{
+	_unknown_device_name = name;
+}
+

lib/misc/lvm-globals.h

@@ -52,6 +52,7 @@ void init_pv_min_size(uint64_t sectors);
 void init_activation_checks(int checks);
 void init_detect_internal_vg_cache_corruption(int detect);
 void init_retry_deactivation(int retry);
+void init_unknown_device_name(const char *name);
 
 void set_cmd_name(const char *cmd_name);
 const char *get_cmd_name(void);
@@ -84,6 +85,7 @@ uint64_t pv_min_size(void);
 int activation_checks(void);
 int detect_internal_vg_cache_corruption(void);
 int retry_deactivation(void);
+const char *unknown_device_name(void);
 
 #define DMEVENTD_MONITOR_IGNORE -1
 int dmeventd_monitor_mode(void);