1 files changed, 118 insertions, 0 deletions
diff --git a/disk-utils/minix_programs.h b/disk-utils/minix_programs.h
new file mode 100644
index 0000000..7ad308d
--- /dev/null
+++ b/disk-utils/minix_programs.h
@@ -0,0 +1,118 @@
+#ifndef UTIL_LINUX_MINIX_PROGRAMS_H
+#define UTIL_LINUX_MINIX_PROGRAMS_H
+
+#include "minix.h"
+
+/*
+ * Global variables.
+ */
+extern int fs_version;
+extern char *super_block_buffer;
+
+#define Super (*(struct minix_super_block *) super_block_buffer)
+#define Super3 (*(struct minix3_super_block *) super_block_buffer)
+
+#define INODE_SIZE (sizeof(struct minix_inode))
+#define INODE2_SIZE (sizeof(struct minix2_inode))
+
+#define BITS_PER_BLOCK (MINIX_BLOCK_SIZE << 3)
+
+#define UPPER(size,n) ((size+((n)-1))/(n))
+
+/*
+ * Inline functions.
+ */
+static inline unsigned long get_ninodes(void)
+{
+	switch (fs_version) {
+	case 3:
+		return Super3.s_ninodes;
+	default:
+		return Super.s_ninodes;
+	}
+}
+
+static inline unsigned long get_nzones(void)
+{
+	switch (fs_version) {
+	case 3:
+		return Super3.s_zones;
+	case 2:
+		return Super.s_zones;
+	default:
+		return Super.s_nzones;
+	}
+}
+
+static inline unsigned long get_nimaps(void)
+{
+	switch (fs_version) {
+	case 3:
+		return Super3.s_imap_blocks;
+	default:
+		return Super.s_imap_blocks;
+	}
+}
+
+static inline unsigned long get_nzmaps(void)
+{
+	switch (fs_version) {
+	case 3:
+		return Super3.s_zmap_blocks;
+	default:
+		return Super.s_zmap_blocks;
+	}
+}
+
+static inline off_t get_first_zone(void)
+{
+	switch (fs_version) {
+	case 3:
+		return Super3.s_firstdatazone;
+	default:
+		return Super.s_firstdatazone;
+	}
+}
+
+static inline size_t get_zone_size(void)
+{
+	switch (fs_version) {
+	case 3:
+		return Super3.s_log_zone_size;
+	default:
+		return Super.s_log_zone_size;
+	}
+}
+
+static inline size_t get_max_size(void)
+{
+	switch (fs_version) {
+	case 3:
+		return Super3.s_max_size;
+	default:
+		return Super.s_max_size;
+	}
+}
+
+static inline unsigned long inode_blocks(void)
+{
+	switch (fs_version) {
+	case 3:
+	case 2:
+		return UPPER(get_ninodes(), MINIX2_INODES_PER_BLOCK);
+	default:
+		return UPPER(get_ninodes(), MINIX_INODES_PER_BLOCK);
+	}
+}
+
+static inline off_t first_zone_data(void)
+{
+	return 2 + get_nimaps() + get_nzmaps() + inode_blocks();
+}
+
+static inline size_t get_inode_buffer_size(void)
+{
+	return inode_blocks() * MINIX_BLOCK_SIZE;
+}
+
+#endif				/* UTIL_LINUX_MINIX_PROGRAMS_H */