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https://github.com/systemd/systemd.git
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cdrom_id: rework feature/profiles buffer parsing
This commit is contained in:
Kay Sievers
parent
c1b7f60dea
commit
0413a47ebf
@ -154,10 +154,10 @@ struct scsi_cmd {
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struct sg_io_hdr sg_io;
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};
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static void scsi_cmd_set(struct udev *udev, struct scsi_cmd *cmd, size_t i, int arg)
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static void scsi_cmd_init(struct udev *udev, struct scsi_cmd *cmd, unsigned char *buf, size_t bufsize)
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{
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if (i == 0) {
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memset(cmd, 0, sizeof(struct scsi_cmd));
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memset(cmd, 0x00, sizeof(struct scsi_cmd));
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memset(buf, 0x00, bufsize);
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cmd->cgc.quiet = 1;
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cmd->cgc.sense = &cmd->_sense.s;
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memset(&cmd->sg_io, 0, sizeof(cmd->sg_io));
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@ -167,6 +167,9 @@ static void scsi_cmd_set(struct udev *udev, struct scsi_cmd *cmd, size_t i, int
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cmd->sg_io.sbp = cmd->_sense.u;
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cmd->sg_io.flags = SG_FLAG_LUN_INHIBIT | SG_FLAG_DIRECT_IO;
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}
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static void scsi_cmd_set(struct udev *udev, struct scsi_cmd *cmd, size_t i, unsigned char arg)
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{
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cmd->sg_io.cmd_len = i + 1;
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cmd->cgc.cmd[i] = arg;
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}
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@ -237,7 +240,7 @@ static int cd_inquiry(struct udev *udev, int fd) {
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unsigned char inq[128];
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int err;
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memset(inq, 0, sizeof(inq));
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scsi_cmd_init(udev, &sc, inq, sizeof(inq));
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scsi_cmd_set(udev, &sc, 0, 0x12);
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scsi_cmd_set(udev, &sc, 4, 36);
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scsi_cmd_set(udev, &sc, 5, 0);
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@ -256,109 +259,132 @@ 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 cd_profiles(struct udev *udev, int fd)
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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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struct scsi_cmd sc;
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unsigned char header[8];
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unsigned char profiles[512];
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unsigned int cur_profile;
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unsigned int len;
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unsigned int i;
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int err;
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memset(header, 0, sizeof(header));
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scsi_cmd_set(udev, &sc, 0, 0x46);
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scsi_cmd_set(udev, &sc, 1, 0);
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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, "GET CONFIGURATION", err);
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return -1;
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}
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len = 4 + (header[0] << 24 | header[1] << 16 | header[2] << 8 | header[3]);
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info(udev, "GET CONFIGURATION: number of profiles %i\n", len);
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if (len > sizeof(profiles)) {
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info(udev, "invalid number of profiles\n");
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return -1;
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}
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memset(profiles, 0, sizeof(profiles));
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scsi_cmd_set(udev, &sc, 0, 0x46);
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scsi_cmd_set(udev, &sc, 1, 1);
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scsi_cmd_set(udev, &sc, 6, len >> 16);
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scsi_cmd_set(udev, &sc, 7, len >> 8);
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scsi_cmd_set(udev, &sc, 8, len);
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scsi_cmd_set(udev, &sc, 9, 0);
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err = scsi_cmd_run(udev, &sc, fd, profiles, len);
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if ((err < 0)) {
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info_scsi_cmd_err(udev, "GET CONFIGURATION", err);
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return -1;
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}
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/* device profiles */
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for (i = 12; i < profiles[11]; i += 4) {
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unsigned int profile = (profiles[i] << 8 | profiles[i + 1]);
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if (profile == 0)
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continue;
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info(udev, "profile 0x%02x\n", profile);
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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 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(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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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, 7, (sizeof(features) >> 8) & 0xff);
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scsi_cmd_set(udev, &sc, 8, sizeof(features) & 0xff);
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scsi_cmd_set(udev, &sc, 9, 0);
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err = scsi_cmd_run(udev, &sc, fd, features, sizeof(features));
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if ((err < 0)) {
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info_scsi_cmd_err(udev, "GET CONFIGURATION", err);
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return -1;
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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 %i\n", len);
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if (len > sizeof(features)) {
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info(udev, "can not get features in a single query, truncating\n");
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len = sizeof(features);
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}
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/* device features */
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for (i = 8; i+4 < len; i += (4 + features[i+3])) {
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unsigned int feature;
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feature = features[i] << 8 | features[i+1];
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switch (feature) {
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case 0x00:
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info(udev, "GET CONFIGURATION: feature 'profiles', with %i entries\n", features[i+3] / 4);
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feature_profiles(udev, &features[i]+4, features[i+3]);
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/* set current profile, if we got a profiles section */
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cur_profile = features[6] << 8 | features[7];
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info(udev, "current profile 0x%02x\n", cur_profile);
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break;
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default:
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info(udev, "GET CONFIGURATION: feature %i <ignored>, with %i bytes\n", feature, features[i+3]);
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break;
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}
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}
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/* current media profile */
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cur_profile = header[6] << 8 | header[7];
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info(udev, "current profile 0x%02x\n", cur_profile);
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if (cur_profile == 0) {
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info(udev, "no current profile, assuming no media\n");
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return -1;
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@ -443,7 +469,7 @@ static int cd_media_info(struct udev *udev, int fd)
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};
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int err;
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memset(header, 0, sizeof(header));
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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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@ -476,7 +502,7 @@ static int cd_media_toc(struct udev *udev, int fd)
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unsigned char *p;
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int err;
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memset(header, 0, sizeof(header));
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scsi_cmd_init(udev, &sc, header, sizeof(header));
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scsi_cmd_set(udev, &sc, 0, 0x43);
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scsi_cmd_set(udev, &sc, 6, 1);
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scsi_cmd_set(udev, &sc, 8, sizeof(header));
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@ -498,7 +524,7 @@ static int cd_media_toc(struct udev *udev, int fd)
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if (len < 8)
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return 0;
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memset(toc, 0, sizeof(toc));
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scsi_cmd_init(udev, &sc, toc, sizeof(toc));
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scsi_cmd_set(udev, &sc, 0, 0x43);
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scsi_cmd_set(udev, &sc, 6, header[2]); /* First Track/Session Number */
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scsi_cmd_set(udev, &sc, 7, len >> 8);
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@ -526,7 +552,7 @@ static int cd_media_toc(struct udev *udev, int fd)
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cd_media_track_count_audio++;
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}
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memset(header, 0, sizeof (header));
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scsi_cmd_init(udev, &sc, header, sizeof(header));
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scsi_cmd_set(udev, &sc, 0, 0x43);
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scsi_cmd_set(udev, &sc, 2, 1); /* Session Info */
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scsi_cmd_set(udev, &sc, 8, 12);
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