Avoiding drive scan if single drive is given
This commit is contained in:
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332a92ac78
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98d742a4ef
@ -1 +1 @@
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#define Cdrskin_timestamP "2008.07.16.090816"
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#define Cdrskin_timestamP "2008.08.01.101053"
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@ -1166,6 +1166,20 @@ int burn_drive_is_banned(char *device_address)
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}
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/* ts A80731 */
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int burn_drive_whitelist_count(void)
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{
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return enumeration_whitelist_top + 1;
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}
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char *burn_drive_whitelist_item(int idx, int flag)
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{
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if (idx < 0 || idx > enumeration_whitelist_top)
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return NULL;
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return enumeration_whitelist[idx];
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}
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/* ts A70924 */
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int burn_drive__fd_from_special_adr(char *adr)
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{
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@ -125,4 +125,10 @@ int burn_drive__fd_from_special_adr(char *adr);
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int burn_drive_find_by_thread_pid(struct burn_drive **d, pid_t pid);
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/* ts A51221 - A80731 : Whitelist inquiry functions */
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int burn_drive_is_banned(char *device_address);
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int burn_drive_whitelist_count(void);
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char *burn_drive_whitelist_item(int idx, int flag);
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#endif /* __DRIVE */
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@ -644,12 +644,195 @@ failed:;
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}
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#define Libburn_drive_new_deaL 1
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#ifdef Libburn_drive_new_deaL
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/* ts A80731 */
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static int is_ata_drive(char *fname)
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{
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int fd;
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struct hd_driveid tm;
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fd = sg_open_drive_fd(fname, 1);
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if (fd == -1) {
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if (linux_ata_enumerate_verbous)
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fprintf(stderr,"open failed, errno=%d '%s'\n",
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errno, strerror(errno));
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return 0;
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}
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memset(&tm, 0, sizeof(tm));
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ioctl(fd, HDIO_GET_IDENTITY, &tm);
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/* not atapi */
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if (!(tm.config & 0x8000) || (tm.config & 0x4000)) {
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if (linux_ata_enumerate_verbous)
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fprintf(stderr, "not marked as ATAPI\n");
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sg_close_drive_fd(fname, -1, &fd, 0);
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return 0;
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}
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/* if SG_IO fails on an atapi device, we should stop trying to
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use hd* devices */
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if (sgio_test(fd) == -1) {
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if (linux_ata_enumerate_verbous)
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fprintf(stderr,
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"FATAL: sgio_test() failed: errno=%d '%s'\n",
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errno, strerror(errno));
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sg_close_drive_fd(fname, -1, &fd, 0);
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return 0;
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}
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if (sg_close_drive_fd(fname, -1, &fd, 1) <= 0) {
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if (linux_ata_enumerate_verbous)
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fprintf(stderr,
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"cannot close properly, errno=%d '%s'\n",
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errno, strerror(errno));
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return 0;
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}
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return 1;
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}
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static int is_scsi_drive(char *fname, int *bus_no, int *host_no,
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int *channel_no, int *target_no, int *lun_no)
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{
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int fd, sid_ret = 0, ret;
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struct sg_scsi_id sid;
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int sibling_fds[BURN_OS_SG_MAX_SIBLINGS], sibling_count= 0;
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char sibling_fnames[BURN_OS_SG_MAX_SIBLINGS][BURN_OS_SG_MAX_NAMELEN];
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fd = sg_open_drive_fd(fname, 1);
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if (fd == -1) {
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if (linux_sg_enumerate_debug)
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fprintf(stderr, "open failed, errno=%d '%s'\n",
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errno, strerror(errno));
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return 0;
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}
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sid_ret = ioctl(fd, SG_GET_SCSI_ID, &sid);
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if (sid_ret == -1) {
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sid.scsi_id = -1; /* mark SCSI address as invalid */
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if(linux_sg_enumerate_debug)
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fprintf(stderr,
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"ioctl(SG_GET_SCSI_ID) failed, errno=%d '%s' , ",
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errno, strerror(errno));
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if (sgio_test(fd) == -1) {
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if (linux_sg_enumerate_debug)
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fprintf(stderr,
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"FATAL: sgio_test() failed: errno=%d '%s'",
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errno, strerror(errno));
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sg_close_drive_fd(fname, -1, &fd, 0);
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return 0;
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}
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#ifdef CDROM_DRIVE_STATUS
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if (strcmp(linux_sg_device_family,"/dev/sg%d") != 0) {
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/* http://developer.osdl.org/dev/robustmutexes/
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src/fusyn.hg/Documentation/ioctl/cdrom.txt */
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sid_ret = ioctl(fd, CDROM_DRIVE_STATUS, 0);
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if(linux_sg_enumerate_debug)
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fprintf(stderr,
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"ioctl(CDROM_DRIVE_STATUS) = %d , ",
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sid_ret);
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if (sid_ret != -1 && sid_ret != CDS_NO_INFO)
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sid.scsi_type = TYPE_ROM;
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else
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sid_ret = -1;
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}
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#endif /* CDROM_DRIVE_STATUS */
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}
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#ifdef SCSI_IOCTL_GET_BUS_NUMBER
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/* Hearsay A61005 */
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if (ioctl(fd, SCSI_IOCTL_GET_BUS_NUMBER, bus_no) == -1)
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*bus_no = -1;
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#endif
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if (sg_close_drive_fd(fname, -1, &fd,
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sid.scsi_type == TYPE_ROM ) <= 0) {
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if (linux_sg_enumerate_debug)
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fprintf(stderr,
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"cannot close properly, errno=%d '%s'\n",
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errno, strerror(errno));
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return 0;
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}
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if ( (sid_ret == -1 || sid.scsi_type != TYPE_ROM)
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&& !linux_sg_accept_any_type) {
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if (linux_sg_enumerate_debug)
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fprintf(stderr, "sid.scsi_type = %d (!= TYPE_ROM)\n",
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sid.scsi_type);
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return 0;
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}
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if (sid_ret == -1 || sid.scsi_id < 0) {
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/* ts A61211 : employ a more general ioctl */
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ret = sg_obtain_scsi_adr(fname, bus_no, host_no,
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channel_no, target_no, lun_no);
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if (ret>0) {
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sid.host_no = *host_no;
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sid.channel = *channel_no;
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sid.scsi_id = *target_no;
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sid.lun = *lun_no;
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} else {
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if (linux_sg_enumerate_debug)
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fprintf(stderr,
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"sg_obtain_scsi_adr() failed\n");
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return 0;
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}
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}
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/* ts A60927 : trying to do locking with growisofs */
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if(burn_sg_open_o_excl>1) {
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ret = sg_open_scsi_siblings(
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fname, -1, sibling_fds, sibling_fnames,
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&sibling_count,
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sid.host_no, sid.channel,
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sid.scsi_id, sid.lun);
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if (ret<=0) {
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if (linux_sg_enumerate_debug)
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fprintf(stderr, "cannot lock siblings\n");
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sg_handle_busy_device(fname, 0);
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return 0;
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}
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/* the final occupation will be done in sg_grab() */
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sg_release_siblings(sibling_fds, sibling_fnames,
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&sibling_count);
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}
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#ifdef SCSI_IOCTL_GET_BUS_NUMBER
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if(*bus_no == -1)
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*bus_no = 1000 * (sid.host_no + 1) + sid.channel;
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#else
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*bus_no = sid.host_no;
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#endif
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*host_no= sid.host_no;
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*channel_no= sid.channel;
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*target_no= sid.scsi_id;
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*lun_no= sid.lun;
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return 1;
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}
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#endif /* Libburn_drive_new_deaL */
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/** Speciality of Linux: detect non-SCSI ATAPI (EIDE) which will from
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then on used used via generic SCSI as is done with (emulated) SCSI drives */
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static void ata_enumerate(void)
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{
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#ifdef Libburn_drive_new_deaL
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int ret;
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#else
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struct hd_driveid tm;
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int i, fd;
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int fd;
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#endif
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int i;
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char fname[10];
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if (linux_ata_enumerate_verbous)
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@ -670,6 +853,17 @@ static void ata_enumerate(void)
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fprintf(stderr, "not in whitelist\n");
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continue;
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}
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#ifdef Libburn_drive_new_deaL
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ret = is_ata_drive(fname);
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if (ret < 0)
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break;
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if (ret == 0)
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continue;
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#else /* Libburn_drive_new_deaL */
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fd = sg_open_drive_fd(fname, 1);
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if (fd == -1) {
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if (linux_ata_enumerate_verbous)
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@ -706,6 +900,10 @@ static void ata_enumerate(void)
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errno, strerror(errno));
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continue;
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}
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#endif /* Libburn_drive_new_deaL */
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if (linux_ata_enumerate_verbous)
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fprintf(stderr, "accepting as drive without SCSI address\n");
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enumerate_common(fname, -1, -1, -1, -1, -1);
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@ -716,12 +914,18 @@ static void ata_enumerate(void)
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/** Detects (probably emulated) SCSI drives */
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static void sg_enumerate(void)
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{
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#ifdef Libburn_drive_new_deaL
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#else
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struct sg_scsi_id sid;
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int i, fd, sibling_fds[BURN_OS_SG_MAX_SIBLINGS], sibling_count= 0, ret;
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int fd, sibling_fds[BURN_OS_SG_MAX_SIBLINGS], sibling_count= 0;
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char sibling_fnames[BURN_OS_SG_MAX_SIBLINGS][BURN_OS_SG_MAX_NAMELEN];
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int sid_ret = 0;
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#endif
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int i, ret;
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int bus_no= -1, host_no= -1, channel_no= -1, target_no= -1, lun_no= -1;
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char fname[17];
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char sibling_fnames[BURN_OS_SG_MAX_SIBLINGS][BURN_OS_SG_MAX_NAMELEN];
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sg_select_device_family();
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@ -748,6 +952,23 @@ static void sg_enumerate(void)
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continue;
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}
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#ifdef Libburn_drive_new_deaL
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ret = is_scsi_drive(fname, &bus_no, &host_no, &channel_no,
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&target_no, &lun_no);
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if (ret < 0)
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break;
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if (ret == 0)
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continue;
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if (linux_sg_enumerate_debug)
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fprintf(stderr, "accepting as SCSI %d,%d,%d,%d bus=%d\n",
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host_no, channel_no, target_no, lun_no, bus_no);
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enumerate_common(fname, bus_no, host_no, channel_no,
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target_no, lun_no);
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#else /* Libburn_drive_new_deaL */
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/* ts A60927 */
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fd = sg_open_drive_fd(fname, 1);
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if (fd == -1) {
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@ -857,16 +1078,57 @@ static void sg_enumerate(void)
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#else
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bus_no = sid.host_no;
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#endif
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if (linux_sg_enumerate_debug)
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fprintf(stderr, "accepting as SCSI %d,%d,%d,%d bus=%d\n",
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sid.host_no, sid.channel, sid.scsi_id, sid.lun,
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bus_no);
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enumerate_common(fname, bus_no, sid.host_no, sid.channel,
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sid.scsi_id, sid.lun);
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#endif /* Libburn_drive_new_deaL */
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}
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}
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#ifdef Libburn_drive_new_deaL
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/* ts A80731 : Directly open the given address from a single-item whitlist */
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int single_enumerate(int flag)
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{
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int wl_count, is_ata= 0, is_scsi= 0;
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int bus_no= -1, host_no= -1, channel_no= -1, target_no= -1, lun_no= -1;
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char *fname;
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wl_count= burn_drive_whitelist_count();
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if (wl_count != 1)
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return 0;
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fname= burn_drive_whitelist_item(0, 0);
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if (fname == NULL)
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return 0;
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is_ata = is_ata_drive(fname);
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if (is_ata < 0)
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return -1;
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if (!is_ata)
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is_scsi = is_scsi_drive(fname, &bus_no, &host_no, &channel_no,
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&target_no, &lun_no);
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if (is_scsi < 0)
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return -1;
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if (is_ata == 0 && is_scsi == 0)
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return 0;
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if (linux_sg_enumerate_debug)
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fprintf(stderr,
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"(single) accepting as SCSI %d,%d,%d,%d bus=%d\n",
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host_no, channel_no, target_no, lun_no, bus_no);
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enumerate_common(fname, bus_no, host_no, channel_no,
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target_no, lun_no);
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return 1;
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}
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#endif /* Libburn_drive_new_deaL */
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/* ts A61115 */
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/* ----------------------------------------------------------------------- */
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/* PORTING: Private functions which contain publicly needed functionality. */
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@ -1007,6 +1269,23 @@ next_nothing:;
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/* ts A61115: replacing call to sg-implementation internals from drive.c */
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int scsi_enumerate_drives(void)
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{
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#ifdef Libburn_drive_new_deaL
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int ret;
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#endif
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#ifdef Libburn_drive_new_deaL
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/* Direct examination of eventually single whitelisted name */
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ret = single_enumerate(0);
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if (ret < 0)
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return -1;
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if (ret > 0)
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return 1;
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/* >>> ??? should one rather use /proc/sys/dev/cdrom/info ? */
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#endif /* Libburn_drive_new_deaL */
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sg_enumerate();
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ata_enumerate();
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return 1;
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