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https://github.com/systemd/systemd.git
synced 2025-03-28 02:50:16 +03:00
cdrom_id: Don't ignore profiles when there is no media available
Just because the GET CONFIGURATION MMC-2 command returns the current profile as 0 does not mean that we can ignore the profiles describing the capabilities of the drive - it only means that there currently is no recognized media in the drive. Therefore, do process the returned profiles even when cur_profile is 0. This fixes a bug where only ID_CDROM=1 ID_CDROM_CD_R=1 ID_CDROM_CD_RW=1 ID_CDROM_DVD=1 ID_CDROM_DVD_R=1 ID_CDROM_DVD_RAM=1 was returned when there is no media in the drive instead of ID_CDROM=1 ID_CDROM_CD=1 ID_CDROM_CD_R=1 ID_CDROM_CD_RW=1 ID_CDROM_DVD=1 ID_CDROM_DVD_R=1 ID_CDROM_DVD_RW=1 ID_CDROM_DVD_RAM=1 ID_CDROM_DVD_PLUS_R=1 ID_CDROM_DVD_PLUS_RW=1 ID_CDROM_DVD_PLUS_R_DL=1 ID_CDROM_BD=1 ID_CDROM_BD_R=1 ID_CDROM_BD_RE=1 ID_CDROM_HDDVD=1 as is returned now. Signed-off-by: David Zeuthen <davidz@redhat.com>
This commit is contained in:
David Zeuthen
parent
5f59fa0900
commit
98ab6a3772
@ -261,168 +261,8 @@ static int cd_inquiry(struct udev *udev, int fd) {
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return 0;
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}
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static int feature_profiles(struct udev *udev, const unsigned char *profiles, size_t size)
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static void feature_profile_media(struct udev *udev, int cur_profile)
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{
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unsigned int i;
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for (i = 0; i+4 <= size; i += 4) {
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int profile;
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profile = profiles[i] << 8 | profiles[i+1];
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switch (profile) {
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case 0x03:
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case 0x04:
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case 0x05:
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info(udev, "profile 0x%02x mo\n", profile);
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cd_mo = 1;
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break;
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case 0x08:
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info(udev, "profile 0x%02x cd_rom\n", profile);
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cd_cd_rom = 1;
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break;
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case 0x09:
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info(udev, "profile 0x%02x cd_r\n", profile);
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cd_cd_r = 1;
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break;
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case 0x0A:
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info(udev, "profile 0x%02x cd_rw\n", profile);
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cd_cd_rw = 1;
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break;
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case 0x10:
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info(udev, "profile 0x%02x dvd_rom\n", profile);
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cd_dvd_rom = 1;
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break;
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case 0x12:
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info(udev, "profile 0x%02x dvd_ram\n", profile);
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cd_dvd_ram = 1;
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break;
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case 0x13:
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case 0x14:
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info(udev, "profile 0x%02x dvd_rw\n", profile);
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cd_dvd_rw = 1;
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break;
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case 0x1B:
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info(udev, "profile 0x%02x dvd_plus_r\n", profile);
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cd_dvd_plus_r = 1;
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break;
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case 0x1A:
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info(udev, "profile 0x%02x dvd_plus_rw\n", profile);
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cd_dvd_plus_rw = 1;
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break;
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case 0x2A:
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info(udev, "profile 0x%02x dvd_plus_rw_dl\n", profile);
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cd_dvd_plus_rw_dl = 1;
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break;
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case 0x2B:
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info(udev, "profile 0x%02x dvd_plus_r_dl\n", profile);
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cd_dvd_plus_r_dl = 1;
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break;
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case 0x40:
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cd_bd = 1;
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info(udev, "profile 0x%02x bd\n", profile);
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break;
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case 0x41:
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case 0x42:
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cd_bd_r = 1;
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info(udev, "profile 0x%02x bd_r\n", profile);
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break;
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case 0x43:
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cd_bd_re = 1;
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info(udev, "profile 0x%02x bd_re\n", profile);
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break;
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case 0x50:
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cd_hddvd = 1;
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info(udev, "profile 0x%02x hddvd\n", profile);
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break;
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case 0x51:
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cd_hddvd_r = 1;
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info(udev, "profile 0x%02x hddvd_r\n", profile);
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break;
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case 0x52:
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cd_hddvd_rw = 1;
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info(udev, "profile 0x%02x hddvd_rw\n", profile);
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break;
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default:
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info(udev, "profile 0x%02x <ignored>\n", profile);
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break;
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}
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}
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return 0;
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}
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static int cd_profiles_old_mmc(struct udev *udev, int fd)
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{
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struct scsi_cmd sc;
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int err;
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unsigned char header[32];
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scsi_cmd_init(udev, &sc, header, sizeof(header));
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scsi_cmd_set(udev, &sc, 0, 0x51);
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scsi_cmd_set(udev, &sc, 8, sizeof(header));
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scsi_cmd_set(udev, &sc, 9, 0);
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err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
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if ((err != 0)) {
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info_scsi_cmd_err(udev, "READ DISC INFORMATION", err);
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if (cd_media == 1) {
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info(udev, "no current profile, but disc is present; assuming CD-ROM\n");
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cd_media_cd_rom = 1;
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return 0;
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} else {
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info(udev, "no current profile, assuming no media\n");
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return -1;
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}
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};
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cd_media = 1;
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if (header[2] & 16) {
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cd_media_cd_rw = 1;
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info(udev, "profile 0x0a media_cd_rw\n");
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} else if ((header[2] & 3) < 2 && cd_cd_r) {
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cd_media_cd_r = 1;
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info(udev, "profile 0x09 media_cd_r\n");
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} else {
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cd_media_cd_rom = 1;
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info(udev, "profile 0x08 media_cd_rom\n");
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}
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return 0;
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}
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static int cd_profiles(struct udev *udev, int fd)
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{
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struct scsi_cmd sc;
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unsigned char features[65530];
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unsigned int cur_profile = 0;
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unsigned int len;
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unsigned int i;
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int err;
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/* First query the current profile */
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scsi_cmd_init(udev, &sc, features, sizeof(features));
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scsi_cmd_set(udev, &sc, 0, 0x46);
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scsi_cmd_set(udev, &sc, 8, 8);
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scsi_cmd_set(udev, &sc, 9, 0);
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err = scsi_cmd_run(udev, &sc, fd, features, 8);
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if ((err != 0)) {
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info_scsi_cmd_err(udev, "GET CONFIGURATION", err);
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/* handle pre-MMC2 drives which do not support GET CONFIGURATION */
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if (SK(err) == 0x5 && ASC(err) == 0x20) {
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info(udev, "drive is pre-MMC2 and does not support 46h get configuration command\n");
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info(udev, "trying to work around the problem\n");
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return cd_profiles_old_mmc(udev, fd);
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}
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return -1;
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}
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cur_profile = features[6] << 8 | features[7];
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if (cur_profile > 0) {
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info(udev, "current profile 0x%02x\n", cur_profile);
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} else {
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info(udev, "no current profile, assuming no media\n");
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return -1;
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}
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switch (cur_profile) {
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case 0x03:
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case 0x04:
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@ -528,7 +368,175 @@ static int cd_profiles(struct udev *udev, int fd)
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info(udev, "profile 0x%02x <ignored>\n", cur_profile);
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break;
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}
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}
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static int feature_profiles(struct udev *udev, const unsigned char *profiles, size_t size)
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{
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unsigned int i;
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for (i = 0; i+4 <= size; i += 4) {
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int profile;
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profile = profiles[i] << 8 | profiles[i+1];
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switch (profile) {
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case 0x03:
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case 0x04:
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case 0x05:
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info(udev, "profile 0x%02x mo\n", profile);
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cd_mo = 1;
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break;
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case 0x08:
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info(udev, "profile 0x%02x cd_rom\n", profile);
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cd_cd_rom = 1;
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break;
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case 0x09:
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info(udev, "profile 0x%02x cd_r\n", profile);
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cd_cd_r = 1;
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break;
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case 0x0A:
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info(udev, "profile 0x%02x cd_rw\n", profile);
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cd_cd_rw = 1;
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break;
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case 0x10:
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info(udev, "profile 0x%02x dvd_rom\n", profile);
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cd_dvd_rom = 1;
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break;
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case 0x12:
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info(udev, "profile 0x%02x dvd_ram\n", profile);
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cd_dvd_ram = 1;
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break;
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case 0x13:
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case 0x14:
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info(udev, "profile 0x%02x dvd_rw\n", profile);
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cd_dvd_rw = 1;
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break;
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case 0x1B:
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info(udev, "profile 0x%02x dvd_plus_r\n", profile);
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cd_dvd_plus_r = 1;
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break;
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case 0x1A:
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info(udev, "profile 0x%02x dvd_plus_rw\n", profile);
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cd_dvd_plus_rw = 1;
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break;
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case 0x2A:
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info(udev, "profile 0x%02x dvd_plus_rw_dl\n", profile);
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cd_dvd_plus_rw_dl = 1;
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break;
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case 0x2B:
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info(udev, "profile 0x%02x dvd_plus_r_dl\n", profile);
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cd_dvd_plus_r_dl = 1;
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break;
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case 0x40:
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cd_bd = 1;
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info(udev, "profile 0x%02x bd\n", profile);
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break;
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case 0x41:
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case 0x42:
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cd_bd_r = 1;
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info(udev, "profile 0x%02x bd_r\n", profile);
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break;
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case 0x43:
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cd_bd_re = 1;
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info(udev, "profile 0x%02x bd_re\n", profile);
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break;
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case 0x50:
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cd_hddvd = 1;
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info(udev, "profile 0x%02x hddvd\n", profile);
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break;
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case 0x51:
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cd_hddvd_r = 1;
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info(udev, "profile 0x%02x hddvd_r\n", profile);
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break;
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case 0x52:
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cd_hddvd_rw = 1;
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info(udev, "profile 0x%02x hddvd_rw\n", profile);
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break;
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default:
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info(udev, "profile 0x%02x <ignored>\n", profile);
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break;
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}
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}
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return 0;
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}
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/* returns 0 if media was detected */
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static int cd_profiles_old_mmc(struct udev *udev, int fd)
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{
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struct scsi_cmd sc;
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int err;
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unsigned char header[32];
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scsi_cmd_init(udev, &sc, header, sizeof(header));
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scsi_cmd_set(udev, &sc, 0, 0x51);
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scsi_cmd_set(udev, &sc, 8, sizeof(header));
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scsi_cmd_set(udev, &sc, 9, 0);
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err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
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if ((err != 0)) {
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info_scsi_cmd_err(udev, "READ DISC INFORMATION", err);
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if (cd_media == 1) {
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info(udev, "no current profile, but disc is present; assuming CD-ROM\n");
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cd_media_cd_rom = 1;
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return 0;
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} else {
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info(udev, "no current profile, assuming no media\n");
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return -1;
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}
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};
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cd_media = 1;
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if (header[2] & 16) {
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cd_media_cd_rw = 1;
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info(udev, "profile 0x0a media_cd_rw\n");
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} else if ((header[2] & 3) < 2 && cd_cd_r) {
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cd_media_cd_r = 1;
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info(udev, "profile 0x09 media_cd_r\n");
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} else {
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cd_media_cd_rom = 1;
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info(udev, "profile 0x08 media_cd_rom\n");
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}
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return 0;
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}
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/* returns 0 if media was detected */
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static int cd_profiles(struct udev *udev, int fd)
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{
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struct scsi_cmd sc;
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unsigned char features[65530];
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unsigned int cur_profile = 0;
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unsigned int len;
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unsigned int i;
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int err;
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int ret;
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ret = -1;
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/* First query the current profile */
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scsi_cmd_init(udev, &sc, features, sizeof(features));
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scsi_cmd_set(udev, &sc, 0, 0x46);
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scsi_cmd_set(udev, &sc, 8, 8);
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scsi_cmd_set(udev, &sc, 9, 0);
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err = scsi_cmd_run(udev, &sc, fd, features, 8);
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if ((err != 0)) {
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info_scsi_cmd_err(udev, "GET CONFIGURATION", err);
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/* handle pre-MMC2 drives which do not support GET CONFIGURATION */
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if (SK(err) == 0x5 && ASC(err) == 0x20) {
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info(udev, "drive is pre-MMC2 and does not support 46h get configuration command\n");
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info(udev, "trying to work around the problem\n");
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ret = cd_profiles_old_mmc(udev, fd);
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}
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goto out;
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}
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cur_profile = features[6] << 8 | features[7];
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if (cur_profile > 0) {
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info(udev, "current profile 0x%02x\n", cur_profile);
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feature_profile_media (udev, cur_profile);
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ret = 0; /* we have media */
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} else {
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info(udev, "no current profile, assuming no media\n");
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}
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len = features[0] << 24 | features[1] << 16 | features[2] << 8 | features[3];
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info(udev, "GET CONFIGURATION: size of features buffer 0x%04x\n", len);
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@ -577,8 +585,8 @@ static int cd_profiles(struct udev *udev, int fd)
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break;
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}
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}
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return 0;
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out:
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return ret;
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}
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static int cd_media_info(struct udev *udev, int fd)
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@ -905,9 +913,12 @@ int main(int argc, char *argv[])
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goto print;
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/* read drive and possibly current profile */
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if (cd_profiles(udev, fd) < 0)
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if (cd_profiles(udev, fd) != 0)
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goto print;
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/* at this point we are guaranteed to have media in the
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* drive - find out more about it */
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/* get session/track info */
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cd_media_toc(udev, fd);
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