More preparation for iso9660

3 files changed, 126 insertions, 5 deletions

diff --git a/src/kernel/dev/pciide.c b/src/kernel/dev/pciide.c
index 58bccfd..5d79470 100644
--- a/src/kernel/dev/pciide.c
+++ b/src/kernel/dev/pciide.c
@@ -742,8 +742,7 @@ size_t ide_vfs_write(fs_handle_ptr f, size_t offset, size_t len, const char* buf
 
 	if (offset % d->block_size != 0) return 0;
 	if (len % d->block_size != 0) return 0;
-
-	uint8_t err = ide_write_sectors(d->c, d->device,
+uint8_t err = ide_write_sectors(d->c, d->device,
 		offset / d->block_size, len / d->block_size, (char*)buf);
 	if (err != 0) return 0;
 
@@ -751,7 +750,13 @@ size_t ide_vfs_write(fs_handle_ptr f, size_t offset, size_t len, const char* buf
 }
 
 int ide_vfs_ioctl(fs_handle_ptr f, int command, void* data) {
-	// TODO
+	ide_vfs_dev_t *d = (ide_vfs_dev_t*)f;
+
+	if (command == IOCTL_BLOCKDEV_GET_BLOCK_SIZE)
+		return d->block_size;
+	if (command == IOCTL_BLOCKDEV_GET_BLOCK_COUNT) 
+		return d->c->devices[d->device].size;
+	
 	return 0;
 }
 
diff --git a/src/kernel/fs/iso9660.c b/src/kernel/fs/iso9660.c
index 8780c32..60e9a81 100644
--- a/src/kernel/fs/iso9660.c
+++ b/src/kernel/fs/iso9660.c
@@ -2,9 +2,38 @@
 
 #include <fs/iso9660.h>
 
+static bool iso9660_make(fs_handle_t *source, const char* opts, fs_t *t);
+static bool iso9660_detect(fs_handle_t *source);
+
+static fs_driver_ops_t iso9660_driver_ops = {
+	.make = iso9660_make,
+	.detect = iso9660_detect,
+};
+
 void register_iso9660_driver() {
-	dbg_printf("Not implemented ISO9660.\n");
-	// TODO
+	ASSERT(sizeof(iso9660_vdt_entry_t) == 2048);
+	ASSERT(sizeof(iso9660_dr_t) == 34);
+
+	register_fs_driver("iso9660", &iso9660_driver_ops);
+}
+
+// ============================== //
+// FILESYSTEM DETECTION AND SETUP //
+// ============================== //
+
+static bool iso9660_detect(fs_handle_t *source) {
+	stat_t st;
+	if (!file_stat(source, &st)) return false;
+	if ((st.type & FT_BLOCKDEV) != 0) return false;
+
+	uint32_t block_size = file_ioctl(source, IOCTL_BLOCKDEV_GET_BLOCK_SIZE, 0);
+	if (block_size != 2048) return false;
+
+	return false;	// TODO
+}
+
+static bool iso9660_make(fs_handle_t *source, const char* opts, fs_t *t) {
+	return false; // TODO
 }
 
 /* vim: set ts=4 sw=4 tw=0 noet :*/
diff --git a/src/kernel/include/fs/iso9660.h b/src/kernel/include/fs/iso9660.h
index 227a8da..fcaec1a 100644
--- a/src/kernel/include/fs/iso9660.h
+++ b/src/kernel/include/fs/iso9660.h
@@ -1,5 +1,92 @@
 #pragma once
 
+#include <vfs.h>
+
+#define ISO9660_VDT_BOOT	0
+#define ISO9660_VDT_PRIMARY 1
+#define ISO9660_VDT_SUPPLEMENTARY 2
+#define ISO9660_VDT_PARTITION 3
+#define ISO9660_VDT_TERMINATOR 255
+
+typedef struct {
+	uint32_t lsb, msb;
+} uint32_lsb_msb_t;
+
+typedef struct {
+	uint16_t lsb, msb;
+} uint16_lsb_msb_t;
+
+typedef struct {
+	uint8_t years_since_1990;
+	uint8_t month;
+	uint8_t day;
+	uint8_t hour;
+	uint8_t minute;
+	uint8_t second;
+	uint8_t gmt_offset;
+} iso9660_dr_date_t;
+
+typedef struct {		// Directory record
+	uint8_t len;		// length of the record
+	uint8_t ear_len;	// length of extended attribute record
+	uint32_lsb_msb_t lba_loc;	// location of extent
+	uint32_lsb_msb_t size;		// size of extent
+	iso9660_dr_date_t date;
+	uint8_t flags;
+	uint8_t interleave_unit_size;
+	uint8_t interleave_gap_size;
+	uint16_lsb_msb_t vol_seq_num;
+	uint8_t name_len;
+	char name[2];		// we want sizeof(iso9660_dr_t) == 34
+} iso9660_dr_t;
+
+typedef struct {		// Boot record
+	uint8_t type;
+	char ident[5];
+	uint8_t version;	// always 1
+	char sys_ident[32];
+	char boot_ident[32];
+	char reserved[1977];
+} iso9660_bootrecord_t;
+
+typedef struct {		// Primary volume descriptor
+	uint8_t type;
+	char ident[5];
+	uint8_t version;	// always 1
+
+	uint8_t unused0;
+
+	char sys_ident[32];
+	char vol_ident[32];
+
+	uint8_t unused1[8];
+
+	uint32_lsb_msb_t volume_size;
+	uint8_t unused2[32];
+
+	uint16_lsb_msb_t volume_set_size, volume_seq_number;
+	uint16_lsb_msb_t block_size;
+	uint32_lsb_msb_t path_table_size;
+	uint32_t lpt_loc, olpt_loc, mpt_loc, ompt_loc;	// location of path tables
+
+	iso9660_dr_t root_directory;
+
+	// more fields (not interesting...)
+} iso9660_pvd_t;
+
+typedef struct {
+	uint8_t type;
+	char ident[5];
+	uint8_t version;	// always 1
+} iso9660_vdt_terminator_t;		// volume descriptor table terminator
+
+typedef union {
+	iso9660_bootrecord_t boot;
+	iso9660_pvd_t prim;
+	iso9660_vdt_terminator_t term;
+	char buf[2048];
+} iso9660_vdt_entry_t;
+
 void register_iso9660_driver();
 
 /* vim: set ts=4 sw=4 tw=0 noet :*/