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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:30:35 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:30:35 +0000
commit378c18e5f024ac5a8aef4cb40d7c9aa9633d144c (patch)
tree44dfb6ca500d32cabd450649b322a42e70a30683 /disk-utils/minix_programs.h
parentInitial commit. (diff)
downloadutil-linux-378c18e5f024ac5a8aef4cb40d7c9aa9633d144c.tar.xz
util-linux-378c18e5f024ac5a8aef4cb40d7c9aa9633d144c.zip
Adding upstream version 2.38.1.upstream/2.38.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'disk-utils/minix_programs.h')
-rw-r--r--disk-utils/minix_programs.h118
1 files changed, 118 insertions, 0 deletions
diff --git a/disk-utils/minix_programs.h b/disk-utils/minix_programs.h
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+++ b/disk-utils/minix_programs.h
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+#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 */