hfsplus: add support of manipulation by attributes file

Add support of manipulation by attributes file.

Signed-off-by: Vyacheslav Dubeyko <slava@dubeyko.com>
Reported-by: Hin-Tak Leung <htl10@users.sourceforge.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/hfsplus/unicode.c b/fs/hfsplus/unicode.c
index a32998f2..2c2e47d 100644
--- a/fs/hfsplus/unicode.c
+++ b/fs/hfsplus/unicode.c
@@ -295,7 +295,8 @@
 	return hfsplus_decompose_table + (off / 4);
 }
 
-int hfsplus_asc2uni(struct super_block *sb, struct hfsplus_unistr *ustr,
+int hfsplus_asc2uni(struct super_block *sb,
+		    struct hfsplus_unistr *ustr, int max_unistr_len,
 		    const char *astr, int len)
 {
 	int size, dsize, decompose;
@@ -303,7 +304,7 @@
 	wchar_t c;
 
 	decompose = !test_bit(HFSPLUS_SB_NODECOMPOSE, &HFSPLUS_SB(sb)->flags);
-	while (outlen < HFSPLUS_MAX_STRLEN && len > 0) {
+	while (outlen < max_unistr_len && len > 0) {
 		size = asc2unichar(sb, astr, len, &c);
 
 		if (decompose)
@@ -311,7 +312,7 @@
 		else
 			dstr = NULL;
 		if (dstr) {
-			if (outlen + dsize > HFSPLUS_MAX_STRLEN)
+			if (outlen + dsize > max_unistr_len)
 				break;
 			do {
 				ustr->unicode[outlen++] = cpu_to_be16(*dstr++);