static unsigned int cd_media_dvd_rom = 0;
static unsigned int cd_media_dvd_r = 0;
static unsigned int cd_media_dvd_rw = 0;
+static unsigned int cd_media_dvd_rw_ro = 0; /* restricted overwrite mode */
+static unsigned int cd_media_dvd_rw_seq = 0; /* sequential mode */
static unsigned int cd_media_dvd_ram = 0;
static unsigned int cd_media_dvd_plus_r = 0;
static unsigned int cd_media_dvd_plus_rw = 0;
return 0;
}
+static int cd_profiles_old_mmc(struct udev *udev, int fd)
+{
+ struct scsi_cmd sc;
+ int err;
+
+ unsigned char header[32];
+
+ scsi_cmd_init(udev, &sc, header, sizeof(header));
+ scsi_cmd_set(udev, &sc, 0, 0x51);
+ scsi_cmd_set(udev, &sc, 8, sizeof(header));
+ scsi_cmd_set(udev, &sc, 9, 0);
+ err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
+ if ((err != 0)) {
+ info_scsi_cmd_err(udev, "READ DISC INFORMATION", err);
+ if (cd_media == 1) {
+ info(udev, "no current profile, but disc is present; assuming CD-ROM\n");
+ cd_media_cd_rom = 1;
+ return 0;
+ } else {
+ info(udev, "no current profile, assuming no media\n");
+ return -1;
+ }
+ };
+
+ cd_media = 1;
+
+ if (header[2] & 16) {
+ cd_media_cd_rw = 1;
+ info(udev, "profile 0x0a media_cd_rw\n");
+ } else if ((header[2] & 3) < 2 && cd_cd_r) {
+ cd_media_cd_r = 1;
+ info(udev, "profile 0x09 media_cd_r\n");
+ } else {
+ cd_media_cd_rom = 1;
+ info(udev, "profile 0x08 media_cd_rom\n");
+ }
+ return 0;
+}
+
static int cd_profiles(struct udev *udev, int fd)
{
struct scsi_cmd sc;
err = scsi_cmd_run(udev, &sc, fd, features, sizeof(features));
if ((err != 0)) {
info_scsi_cmd_err(udev, "GET CONFIGURATION", err);
+ /* handle pre-MMC2 drives which do not support GET CONFIGURATION */
+ if (SK(err) == 0x5 && ASC(err) == 0x20) {
+ info(udev, "drive is pre-MMC2 and does not support 46h get configuration command\n");
+ info(udev, "trying to work around the problem\n");
+ return cd_profiles_old_mmc(udev, fd);
+ }
return -1;
}
cd_media_dvd_ram = 1;
break;
case 0x13:
+ info(udev, "profile 0x%02x media_dvd_rw_ro\n", cur_profile);
+ cd_media = 1;
+ cd_media_dvd_rw = 1;
+ cd_media_dvd_rw_ro = 1;
+ break;
case 0x14:
- info(udev, "profile 0x%02x media_dvd_rw\n", cur_profile);
+ info(udev, "profile 0x%02x media_dvd_rw_seq\n", cur_profile);
cd_media = 1;
cd_media_dvd_rw = 1;
+ cd_media_dvd_rw_seq = 1;
break;
case 0x1B:
info(udev, "profile 0x%02x media_dvd_plus_r\n", cur_profile);
cd_media = 1;
info(udev, "disk type %02x\n", header[8]);
+ info(udev, "hardware reported media status: %s\n", media_status[header[2] & 3]);
/* exclude plain CDROM, some fake cdroms return 0 for "blank" media here */
if (!cd_media_cd_rom)
cd_media_state = media_status[header[2] & 3];
- /* DVD+RW discs once formatted are always "complete", DVD-RAM are
- * "other" or "complete" if the disc is write protected; we need to
- * check the contents if it is blank */
- if ((cd_media_dvd_plus_rw || cd_media_dvd_plus_rw_dl || cd_media_dvd_ram) && (header[2] & 3) > 1) {
- unsigned char buffer[17 * 2048];
+ /* fresh DVD-RW in restricted overwite mode reports itself as
+ * "appendable"; change it to "blank" to make it consistent with what
+ * gets reported after blanking, and what userspace expects */
+ if (cd_media_dvd_rw_ro && (header[2] & 3) == 1)
+ cd_media_state = media_status[0];
+
+ /* DVD+RW discs (and DVD-RW in restricted mode) once formatted are
+ * always "complete", DVD-RAM are "other" or "complete" if the disc is
+ * write protected; we need to check the contents if it is blank */
+ if ((cd_media_dvd_rw_ro || cd_media_dvd_plus_rw || cd_media_dvd_plus_rw_dl || cd_media_dvd_ram) && (header[2] & 3) > 1) {
+ unsigned char buffer[32 * 2048];
unsigned char result, len;
int block, offset;
scsi_cmd_init(udev, &sc, buffer, sizeof(buffer));
scsi_cmd_set(udev, &sc, 0, 0x28);
scsi_cmd_set(udev, &sc, 5, 0);
- scsi_cmd_set(udev, &sc, 8, 17);
+ scsi_cmd_set(udev, &sc, 8, 32);
scsi_cmd_set(udev, &sc, 9, 0);
err = scsi_cmd_run(udev, &sc, fd, buffer, sizeof(buffer));
if ((err != 0)) {
}
determined:
- if ((header[2] & 3) != 2)
+ /* "other" is e. g. DVD-RAM, can't append sessions there; DVDs in
+ * restricted overwrite mode can never append, only in sequential mode */
+ if ((header[2] & 3) < 2 && !cd_media_dvd_rw_ro)
cd_media_session_next = header[10] << 8 | header[5];
cd_media_session_count = header[9] << 8 | header[4];
cd_media_track_count = header[11] << 8 | header[6];
struct scsi_cmd sc;
unsigned char header[12];
unsigned char toc[2048];
- unsigned int len, i;
+ unsigned int len, i, num_tracks;
unsigned char *p;
int err;
}
len = (header[0] << 8 | header[1]) + 2;
- info(udev, "READ TOC: len: %d\n", len);
+ info(udev, "READ TOC: len: %d, start track: %d, end track: %d\n", len, header[2], header[3]);
if (len > sizeof(toc))
return -1;
if (len < 2)
return -1;
+ /* 2: first track, 3: last track */
+ num_tracks = header[3] - header[2] + 1;
/* empty media has no tracks */
if (len < 8)
return -1;
}
- for (p = toc+4, i = 4; i < len-8; i += 8, p += 8) {
+ /* Take care to not iterate beyond the last valid track as specified in
+ * the TOC, but also avoid going beyond the TOC length, just in case
+ * the last track number is invalidly large */
+ for (p = toc+4, i = 4; i < len-8 && num_tracks > 0; i += 8, p += 8, --num_tracks) {
unsigned int block;
unsigned int is_data_track;
if (cd_profiles(udev, fd) < 0)
goto print;
- /* get writable media state */
- if (cd_media_info(udev, fd) < 0)
- goto print;
-
/* get session/track info */
- if (cd_media_toc(udev, fd) < 0)
- goto print;
+ cd_media_toc(udev, fd);
+
+ /* get writable media state */
+ cd_media_info(udev, fd);
print:
printf("ID_CDROM=1\n");
~ianmdlvl / elogind.git / blobdiff