Re: [Qemu-devel] enh req: Allow ATAPI CD-ROM to be attached other than sec/master

["Leonardo E. Reiter" <lreiter@win4lin.com>]

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Jim,

thanks for the patch, it seems to work great.  However, I'm attaching an 
updated version that fixes the following [minor] problems:

1. qemu was not correctly aborting [with help] if no arguments/disk 
images were specified
2. using the method "qemu [options] <disk-image>" no longer worked... 
you had to specify -hda explicitly.

1 and 2 are fixed in this patch that I attached.  It's also diff'ed 
against today's CVS, so it applies without fuzz or hunks.

Like I said, these fixes are minor more than anything else - otherwise 
the patch works great for me so far.  I've been able to do a Windows XP 
install with 2 CDROM images attached.  That's the extent of my testing 
so far, but I don't see any reason why there would be any problems 
otherwise.

Regards,

Leo Reiter

Jim C. Brown wrote:
> On Fri, Apr 14, 2006 at 02:41:12PM -0400, Jim C. Brown wrote:
> 
>>Attached is a patch that does just that.
>>
>>The default -cdrom still works, but you can also use -cdrom-a, -cdrom-b, -cdrom-c, and -cdrom-d to specify if the cdrom should be plugged in place over hda, hdb, hdc, or hdd respectively.
>>
>>Also includes a few tests to make sure you don't clobber a hard disk with a cdrom, or use the same -hdX or -cdrom-X option multiple times.
>

-- 
Leonardo E. Reiter
Vice President of Product Development, CTO

Win4Lin, Inc.
Virtual Computing from Desktop to Data Center
Main: +1 512 339 7979
Fax: +1 512 532 6501
http://www.win4lin.com

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Index: vl.c
===================================================================
RCS file: /cvsroot/qemu/qemu/vl.c,v
retrieving revision 1.171
diff -a -u -r1.171 vl.c
--- vl.c	16 Apr 2006 11:06:58 -0000	1.171
+++ vl.c	17 Apr 2006 16:22:45 -0000
@@ -4572,6 +4572,7 @@
            "-hda/-hdb file  use 'file' as IDE hard disk 0/1 image\n"
            "-hdc/-hdd file  use 'file' as IDE hard disk 2/3 image\n"
            "-cdrom file     use 'file' as IDE cdrom image (cdrom is ide1 master)\n"
+           "-cdrom-[n] file use 'file' as IDE cdrom image (n is a, b, c, or d)\n"
            "-boot [a|c|d]   boot on floppy (a), hard disk (c) or CD-ROM (d)\n"
 	   "-snapshot       write to temporary files instead of disk image files\n"
            "-m megs         set virtual RAM size to megs MB [default=%d]\n"
@@ -4700,6 +4701,10 @@
     QEMU_OPTION_hdc,
     QEMU_OPTION_hdd,
     QEMU_OPTION_cdrom,
+    QEMU_OPTION_cdrom_a,
+    QEMU_OPTION_cdrom_b,
+    QEMU_OPTION_cdrom_c,
+    QEMU_OPTION_cdrom_d,
     QEMU_OPTION_boot,
     QEMU_OPTION_snapshot,
     QEMU_OPTION_m,
@@ -4761,6 +4766,10 @@
     { "hdc", HAS_ARG, QEMU_OPTION_hdc },
     { "hdd", HAS_ARG, QEMU_OPTION_hdd },
     { "cdrom", HAS_ARG, QEMU_OPTION_cdrom },
+    { "cdrom-a", HAS_ARG, QEMU_OPTION_cdrom_a },
+    { "cdrom-b", HAS_ARG, QEMU_OPTION_cdrom_b },
+    { "cdrom-c", HAS_ARG, QEMU_OPTION_cdrom_c },
+    { "cdrom-d", HAS_ARG, QEMU_OPTION_cdrom_d },
     { "boot", HAS_ARG, QEMU_OPTION_boot },
     { "snapshot", 0, QEMU_OPTION_snapshot },
     { "m", HAS_ARG, QEMU_OPTION_m },
@@ -5004,6 +5013,7 @@
     int snapshot, linux_boot;
     const char *initrd_filename;
     const char *hd_filename[MAX_DISKS], *fd_filename[MAX_FD];
+    int hd_is_cdrom[MAX_DISKS];
     const char *kernel_filename, *kernel_cmdline;
     DisplayState *ds = &display_state;
     int cyls, heads, secs, translation;
@@ -5034,7 +5044,10 @@
     for(i = 0; i < MAX_FD; i++)
         fd_filename[i] = NULL;
     for(i = 0; i < MAX_DISKS; i++)
+    {
         hd_filename[i] = NULL;
+        hd_is_cdrom[i] = 0;
+    }
     ram_size = DEFAULT_RAM_SIZE * 1024 * 1024;
     vga_ram_size = VGA_RAM_SIZE;
     bios_size = BIOS_SIZE;
@@ -5046,11 +5059,7 @@
     nographic = 0;
     kernel_filename = NULL;
     kernel_cmdline = "";
-#ifdef TARGET_PPC
-    cdrom_index = 1;
-#else
-    cdrom_index = 2;
-#endif
+    cdrom_index = -1; //disable by default
     cyls = heads = secs = 0;
     translation = BIOS_ATA_TRANSLATION_AUTO;
     pstrcpy(monitor_device, sizeof(monitor_device), "vc");
@@ -5129,9 +5138,12 @@
                 {
                     int hd_index;
                     hd_index = popt->index - QEMU_OPTION_hda;
+                    if (hd_filename[hd_index] != NULL) {
+                        fprintf(stderr, "qemu: can't share multiple disks\n");
+                        exit(1);
+                    }
                     hd_filename[hd_index] = optarg;
-                    if (hd_index == cdrom_index)
-                        cdrom_index = -1;
+                    hd_is_cdrom[hd_index] = 0;
                 }
                 break;
             case QEMU_OPTION_snapshot:
@@ -5185,9 +5197,26 @@
                 kernel_cmdline = optarg;
                 break;
             case QEMU_OPTION_cdrom:
-                if (cdrom_index >= 0) {
-                    hd_filename[cdrom_index] = optarg;
+            case QEMU_OPTION_cdrom_a:
+            case QEMU_OPTION_cdrom_b:
+            case QEMU_OPTION_cdrom_c:
+            case QEMU_OPTION_cdrom_d:
+              if (popt->index == QEMU_OPTION_cdrom)
+/* use a sensible default */
+#ifdef TARGET_PPC
+                cdrom_index = 1;
+#else
+                cdrom_index = 2;
+#endif
+                else
+                    cdrom_index = popt->index - QEMU_OPTION_cdrom_a;
+
+                if (hd_filename[cdrom_index] != NULL) {
+                    fprintf(stderr, "qemu: can't share multiple disks\n");
+                    exit(1);
                 }
+                hd_filename[cdrom_index] = optarg;
+                hd_is_cdrom[cdrom_index] = 1;
                 break;
             case QEMU_OPTION_boot:
                 boot_device = optarg[0];
@@ -5407,7 +5436,8 @@
         
     if (!linux_boot && 
         hd_filename[0] == '\0' && 
-        (cdrom_index >= 0 && hd_filename[cdrom_index] == '\0') &&
+        ((cdrom_index >= 0 && hd_filename[cdrom_index] == '\0') || 
+	 (cdrom_index < 0)) &&
         fd_filename[0] == '\0')
         help();
     
@@ -5493,9 +5523,21 @@
 
     /* we always create the cdrom drive, even if no disk is there */
     bdrv_init();
+    int ci = 0;
+    char cdrom_name[7];
+    strcpy(cdrom_name, "cdrom");
+    cdrom_name[6] = '\0';
     if (cdrom_index >= 0) {
-        bs_table[cdrom_index] = bdrv_new("cdrom");
-        bdrv_set_type_hint(bs_table[cdrom_index], BDRV_TYPE_CDROM);
+        for (i = 0; i < MAX_DISKS; i++)
+        {
+            if (hd_is_cdrom[i])
+            {
+                bs_table[i] = bdrv_new(cdrom_name);
+                ci++;
+                cdrom_name[5] = '0' + (char)ci;
+                bdrv_set_type_hint(bs_table[i], BDRV_TYPE_CDROM);
+            }
+        }
     }
 
     /* open the virtual block devices */