DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(media_state, MediaState);
+static int dvd_ram_media_update_state(Context *c) {
+ struct scsi_cmd sc;
+ unsigned char dvdstruct[8];
+ unsigned char format[12];
+ unsigned char len;
+ int r;
+
+ assert(c);
+
+ /* Return 1 if media state is determined. */
+
+ if (c->media_feature != FEATURE_DVD_RAM)
+ return 0;
+
+ /* a write protected dvd-ram may report "complete" status */
+ scsi_cmd_init(&sc);
+ scsi_cmd_set(&sc, 0, GPCMD_READ_DVD_STRUCTURE);
+ scsi_cmd_set(&sc, 7, 0xC0);
+ scsi_cmd_set(&sc, 9, sizeof(dvdstruct));
+ scsi_cmd_set(&sc, 11, 0);
+ r = scsi_cmd_run_and_log(&sc, c->fd, dvdstruct, sizeof(dvdstruct), "read DVD structure");
+ if (r < 0)
+ return r;
+
+ if (dvdstruct[4] & 0x02) {
+ c->media_state = MEDIA_STATE_COMPLETE;
+ log_debug("write-protected DVD-RAM media inserted");
+ return 1;
+ }
+
+ /* let's make sure we don't try to read unformatted media */
+ scsi_cmd_init(&sc);
+ scsi_cmd_set(&sc, 0, GPCMD_READ_FORMAT_CAPACITIES);
+ scsi_cmd_set(&sc, 8, sizeof(format));
+ scsi_cmd_set(&sc, 9, 0);
+ r = scsi_cmd_run_and_log(&sc, c->fd, format, sizeof(format), "read DVD format capacities");
+ if (r < 0)
+ return r;
+
+ len = format[3];
+ if (len & 7 || len < 16)
+ return log_debug_errno(SYNTHETIC_ERRNO(EINVAL),
+ "invalid format capacities length");
+
+ switch(format[8] & 3) {
+ case 1:
+ /* This means that last format was interrupted or failed, blank dvd-ram discs are
+ * factory formatted. Take no action here as it takes quite a while to reformat a
+ * dvd-ram and it's not automatically started. */
+ log_debug("unformatted DVD-RAM media inserted");
+ return 1;
+
+ case 2:
+ log_debug("formatted DVD-RAM media inserted");
+ return 0;
+
+ case 3:
+ c->has_media = false;
+ return log_debug_errno(SYNTHETIC_ERRNO(ENOMEDIUM),
+ "format capacities returned no media");
+ }
+
+ return 0;
+}
+
+static int dvd_media_update_state(Context *c) {
+ struct scsi_cmd sc;
+ unsigned char buffer[32 * 2048];
+ int offset, r;
+
+ r = dvd_ram_media_update_state(c);
+ if (r != 0)
+ return r;
+
+ /* Take a closer look at formatted media (unformatted DVD+RW
+ * has "blank" status", DVD-RAM was examined earlier) and check
+ * for ISO and UDF PVDs or a fs superblock presence and do it
+ * in one ioctl (we need just sectors 0 and 16) */
+
+ scsi_cmd_init(&sc);
+ scsi_cmd_set(&sc, 0, GPCMD_READ_10);
+ scsi_cmd_set(&sc, 5, 0);
+ scsi_cmd_set(&sc, 8, sizeof(buffer)/2048);
+ scsi_cmd_set(&sc, 9, 0);
+ r = scsi_cmd_run_and_log(&sc, c->fd, buffer, sizeof(buffer), "read first 32 blocks");
+ if (r < 0) {
+ c->has_media = false;
+ return r;
+ }
+
+ /* if any non-zero data is found in sector 16 (iso and udf) or
+ * eventually 0 (fat32 boot sector, ext2 superblock, etc), disc
+ * is assumed non-blank */
+
+ for (offset = 32768; offset < 32768 + 2048; offset++)
+ if (buffer[offset] != 0) {
+ log_debug("data in block 16, assuming complete");
+ return 0;
+ }
+
+ for (offset = 0; offset < 2048; offset++)
+ if (buffer[offset] != 0) {
+ log_debug("data in block 0, assuming complete");
+ return 0;
+ }
+
+ log_debug("no data in blocks 0 or 16, assuming blank");
+ c->media_state = MEDIA_STATE_BLANK;
+ return 0;
+}
+
static int cd_media_info(Context *c) {
struct scsi_cmd sc;
unsigned char header[32];
* write protected; we need to check the contents if it is blank */
if (IN_SET(c->media_feature, FEATURE_DVD_RW_RO, FEATURE_DVD_PLUS_RW, FEATURE_DVD_PLUS_RW_DL, FEATURE_DVD_RAM) &&
IN_SET(state, MEDIA_STATE_COMPLETE, MEDIA_STATE_OTHER)) {
- unsigned char buffer[32 * 2048];
- unsigned char len;
- int offset;
-
- if (c->media_feature == FEATURE_DVD_RAM) {
- /* a write protected dvd-ram may report "complete" status */
-
- unsigned char dvdstruct[8];
- unsigned char format[12];
-
- scsi_cmd_init(&sc);
- scsi_cmd_set(&sc, 0, GPCMD_READ_DVD_STRUCTURE);
- scsi_cmd_set(&sc, 7, 0xC0);
- scsi_cmd_set(&sc, 9, sizeof(dvdstruct));
- scsi_cmd_set(&sc, 11, 0);
- r = scsi_cmd_run_and_log(&sc, c->fd, dvdstruct, sizeof(dvdstruct), "read DVD structure");
- if (r < 0)
- return r;
-
- if (dvdstruct[4] & 0x02) {
- c->media_state = MEDIA_STATE_COMPLETE;
- log_debug("write-protected DVD-RAM media inserted");
- goto determined;
- }
-
- /* let's make sure we don't try to read unformatted media */
- scsi_cmd_init(&sc);
- scsi_cmd_set(&sc, 0, GPCMD_READ_FORMAT_CAPACITIES);
- scsi_cmd_set(&sc, 8, sizeof(format));
- scsi_cmd_set(&sc, 9, 0);
- r = scsi_cmd_run_and_log(&sc, c->fd, format, sizeof(format), "read DVD format capacities");
- if (r < 0)
- return r;
-
- len = format[3];
- if (len & 7 || len < 16)
- return log_debug_errno(SYNTHETIC_ERRNO(EINVAL),
- "invalid format capacities length");
-
- switch(format[8] & 3) {
- case 1:
- log_debug("unformatted DVD-RAM media inserted");
- /* This means that last format was interrupted
- * or failed, blank dvd-ram discs are factory
- * formatted. Take no action here as it takes
- * quite a while to reformat a dvd-ram and it's
- * not automatically started */
- goto determined;
-
- case 2:
- log_debug("formatted DVD-RAM media inserted");
- break;
-
- case 3:
- c->has_media = false;
- return log_debug_errno(SYNTHETIC_ERRNO(ENOMEDIUM),
- "format capacities returned no media");
- }
- }
-
- /* Take a closer look at formatted media (unformatted DVD+RW
- * has "blank" status", DVD-RAM was examined earlier) and check
- * for ISO and UDF PVDs or a fs superblock presence and do it
- * in one ioctl (we need just sectors 0 and 16) */
- scsi_cmd_init(&sc);
- scsi_cmd_set(&sc, 0, GPCMD_READ_10);
- scsi_cmd_set(&sc, 5, 0);
- scsi_cmd_set(&sc, 8, sizeof(buffer)/2048);
- scsi_cmd_set(&sc, 9, 0);
- r = scsi_cmd_run_and_log(&sc, c->fd, buffer, sizeof(buffer), "read first 32 blocks");
- if (r < 0) {
- c->has_media = false;
+ r = dvd_media_update_state(c);
+ if (r < 0)
return r;
- }
-
- /* if any non-zero data is found in sector 16 (iso and udf) or
- * eventually 0 (fat32 boot sector, ext2 superblock, etc), disc
- * is assumed non-blank */
-
- for (offset = 32768; offset < (32768 + 2048); offset++) {
- if (buffer [offset]) {
- log_debug("data in block 16, assuming complete");
- goto determined;
- }
- }
-
- for (offset = 0; offset < 2048; offset++) {
- if (buffer [offset]) {
- log_debug("data in block 0, assuming complete");
- goto determined;
- }
- }
-
- c->media_state = MEDIA_STATE_BLANK;
- log_debug("no data in blocks 0 or 16, assuming blank");
}
-determined:
/* "other" is e. g. DVD-RAM, can't append sessions there; DVDs in
* restricted overwrite mode can never append, only in sequential mode */
if (c->media_feature != FEATURE_DVD_RW_RO && IN_SET(state, MEDIA_STATE_BLANK, MEDIA_STATE_APPENDABLE))
projects / thirdparty / systemd.git / commitdiff
