btrfs-progs: factor out profile parsing to common utils

There are some duplicate parsers of the profile names, factor out the
one from balance to the common code.

Signed-off-by: David Sterba <dsterba@suse.com>

cmds/balance.c

@@ -32,6 +32,7 @@
 #include "common/open-utils.h"
 #include "cmds/commands.h"
 #include "common/utils.h"
+#include "common/parse-utils.h"
 #include "common/help.h"
 
 static const char * const balance_cmd_group_usage[] = {
@@ -42,21 +43,18 @@ static const char * const balance_cmd_group_usage[] = {
 
 static int parse_one_profile(const char *profile, u64 *flags)
 {
-	int i;
+	int ret;
+	u64 tmp = 0;
 
-	for (i = 0; i < BTRFS_NR_RAID_TYPES; i++) {
+	ret = parse_bg_profile(profile, &tmp);
-		if (strcasecmp(btrfs_raid_array[i].raid_name, profile) == 0) {
+	if (ret) {
-			u64 tmp;
+		error("unknown profile: %s", profile);
-
+		return 1;
-			tmp = btrfs_raid_array[i].bg_flag;
-			if (tmp == 0)
-				tmp = BTRFS_AVAIL_ALLOC_BIT_SINGLE;
-			*flags |= tmp;
-			return 0;
-		}
 	}
-	error("unknown profile: %s", profile);
+	if (tmp == 0)
-	return 1;
+		tmp = BTRFS_AVAIL_ALLOC_BIT_SINGLE;
+	*flags |= tmp;
+	return ret;
 }
 
 static int parse_profiles(char *profiles, u64 *flags)

common/parse-utils.c

@@ -19,6 +19,7 @@
 #include <ctype.h>
 #include "common/parse-utils.h"
 #include "common/messages.h"
+#include "kernel-shared/volumes.h"
 
 int parse_u64(const char *str, u64 *result)
 {
@@ -241,3 +242,21 @@ int fls64(u64 x)
 	return 64 - i;
 }
 
+/*
+ * Parse string description of block group profile and set that bit in @flags.
+ * Return 1 if the profile is not valid, otherwise 0.
+ *
+ * String matched against btrfs_raid_array, case insensitive.
+ */
+int parse_bg_profile(const char *profile, u64 *flags)
+{
+	int i;
+
+	for (i = 0; i < BTRFS_NR_RAID_TYPES; i++) {
+		if (strcasecmp(btrfs_raid_array[i].raid_name, profile) == 0) {
+			*flags |= btrfs_raid_array[i].bg_flag;
+			return 0;
+		}
+	}
+	return 1;
+}

common/parse-utils.h

@@ -27,6 +27,7 @@ int parse_u64(const char *str, u64 *result);
 int parse_range_u32(const char *range, u32 *start, u32 *end);
 int parse_range(const char *range, u64 *start, u64 *end);
 int parse_range_strict(const char *range, u64 *start, u64 *end);
+int parse_bg_profile(const char *profile, u64 *flags);
 int fls64(u64 x);
 
 #endif