minix: move globals and inline functions to minix_programs.h

Global variables and inline functions are moved from minix.h to
minix_programs.h which is included in mkfs.minix and fsck.minix.
The minix.h will have only struct definitions etc generic
contents which is reasonable to share with utilities and
libraries.

Signed-off-by: Sami Kerola <kerolasa@iki.fi>

1 files changed, 113 insertions, 0 deletions

diff --git a/disk-utils/minix_programs.h b/disk-utils/minix_programs.h
new file mode 100644
index 000000000..3e6c649ac
--- /dev/null
+++ b/disk-utils/minix_programs.h
@@ -0,0 +1,113 @@
+#ifndef UTIL_LINUX_MINIX_PROGRAMS_H
+#define UTIL_LINUX_MINIX_PROGRAMS_H
+
+#include "minix.h"
+
+/*
+ * Global variables.
+ */
+static int fs_version = 1;	/* this default value needs to change in a near future */
+
+static char *super_block_buffer;
+static char *inode_buffer = NULL;
+
+static char *inode_map;
+static char *zone_map;
+
+/*
+ * Inline functions.
+ */
+static inline unsigned long get_ninodes(void)
+{
+	switch (fs_version) {
+	case 3:
+		return Super3.s_ninodes;
+	default:
+		return (unsigned long)Super.s_ninodes;
+	}
+}
+
+static inline unsigned long get_nzones(void)
+{
+	switch (fs_version) {
+	case 3:
+		return (unsigned long)Super3.s_zones;
+	case 2:
+		return (unsigned long)Super.s_zones;
+	default:
+		return (unsigned long)Super.s_nzones;
+	}
+}
+
+static inline unsigned long get_nimaps(void)
+{
+	switch (fs_version) {
+	case 3:
+		return (unsigned long)Super3.s_imap_blocks;
+	default:
+		return (unsigned long)Super.s_imap_blocks;
+	}
+}
+
+static inline unsigned long get_nzmaps(void)
+{
+	switch (fs_version) {
+	case 3:
+		return (unsigned long)Super3.s_zmap_blocks;
+	default:
+		return (unsigned long)Super.s_zmap_blocks;
+	}
+}
+
+static inline unsigned long get_first_zone(void)
+{
+	switch (fs_version) {
+	case 3:
+		return (unsigned long)Super3.s_firstdatazone;
+	default:
+		return (unsigned long)Super.s_firstdatazone;
+	}
+}
+
+static inline unsigned long get_zone_size(void)
+{
+	switch (fs_version) {
+	case 3:
+		return (unsigned long)Super3.s_log_zone_size;
+	default:
+		return (unsigned long)Super.s_log_zone_size;
+	}
+}
+
+static inline unsigned long get_max_size(void)
+{
+	switch (fs_version) {
+	case 3:
+		return (unsigned long)Super3.s_max_size;
+	default:
+		return (unsigned long)Super.s_max_size;
+	}
+}
+
+static 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 unsigned long first_zone_data(void)
+{
+	return 2 + get_nimaps() + get_nzmaps() + inode_blocks();
+}
+
+static inline unsigned long get_inode_buffer_size(void)
+{
+	return inode_blocks() * MINIX_BLOCK_SIZE;
+}
+
+#endif				/* UTIL_LINUX_MINIX_PROGRAMS_H */