support case ignored suffix for sizes

doc/lxc.container.conf.sgml.in

@@ -819,15 +819,16 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
             ringbuffer. Note that ringbuffer must be at least as big as a
             standard page size. When passed a value smaller than a single page
             size liblxc will allocate a ringbuffer of a single page size. A page
-            size is usually 4kB.
+            size is usually 4KB.
 
             The keyword 'auto' will cause liblxc to allocate a ringbuffer of
-            128kB.
+            128KB.
 
             When manually specifying a size for the ringbuffer the value should
             be a power of 2 when converted to bytes. Valid size prefixes are
-            'kB', 'MB', 'GB'. (Note that all conversions are based on multiples
-            of 1024. That means 'kb' == 'KiB', 'MB' == 'MiB', 'GB' == 'GiB'.)
+            'KB', 'MB', 'GB'. (Note that all conversions are based on multiples
+            of 1024. That means 'KB' == 'KiB', 'MB' == 'MiB', 'GB' == 'GiB'.
+			And ignored case, for example 'kB', 'KB' and 'Kb' is same.)
             </para>
           </listitem>
         </varlistentry>
@@ -843,15 +844,16 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
             <option>lxc.console.logfile</option>. Note that size of the log file
             must be at least as big as a standard page size. When passed a value
             smaller than a single page size liblxc will set the size of log file
-            to a single page size. A page size is usually 4kB.
+            to a single page size. A page size is usually 4KB.
 
-            The keyword 'auto' will cause liblxc to place a limit of 128kB on
+            The keyword 'auto' will cause liblxc to place a limit of 128KB on
             the log file.
 
             When manually specifying a size for the log file the value should
             be a power of 2 when converted to bytes. Valid size prefixes are
-            'kB', 'MB', 'GB'. (Note that all conversions are based on multiples
-            of 1024. That means 'kb' == 'KiB', 'MB' == 'MiB', 'GB' == 'GiB'.)
+            'KB', 'MB', 'GB'. (Note that all conversions are based on multiples
+            of 1024. That means 'KB' == 'KiB', 'MB' == 'MiB', 'GB' == 'GiB'. 
+			And ignored case, for example 'kB', 'KB' and 'Kb' is same.)
 
             If users want to mirror the console ringbuffer on disk they should set
             <option>lxc.console.size</option> equal to

src/lxc/utils.c

@@ -2450,11 +2450,11 @@ int parse_byte_size_string(const char *s, int64_t *converted)
 		return 0;
 	}
 
-	if (!strcmp(suffix, "kB"))
+	if (!strcasecmp(suffix, "KB"))
 		mltpl = 1024;
-	else if (!strcmp(suffix, "MB"))
+	else if (!strcasecmp(suffix, "MB"))
 		mltpl = 1024 * 1024;
-	else if (!strcmp(suffix, "GB"))
+	else if (!strcasecmp(suffix, "GB"))
 		mltpl = 1024 * 1024 * 1024;
 	else
 		return -EINVAL;