qemu: Fix detection of drive readonly option

So far, readonly=on option is used when qemu supports -device. However,
there are qemu versions which support readonly option with -drive
although they don't have support for -device.

src/qemu/qemu_conf.c

@@ -1187,6 +1187,8 @@ static unsigned long long qemudComputeCmdFlags(const char *help,
             flags |= QEMUD_CMD_FLAG_DRIVE_CACHE_V2;
         if (strstr(help, "format="))
             flags |= QEMUD_CMD_FLAG_DRIVE_FORMAT;
+        if (strstr(help, "readonly="))
+            flags |= QEMUD_CMD_FLAG_DRIVE_READONLY;
     }
     if (strstr(help, "-vga") && !strstr(help, "-std-vga"))
         flags |= QEMUD_CMD_FLAG_VGA;
@@ -1202,8 +1204,14 @@ static unsigned long long qemudComputeCmdFlags(const char *help,
         flags |= QEMUD_CMD_FLAG_CHARDEV;
     if (strstr(help, "-balloon"))
         flags |= QEMUD_CMD_FLAG_BALLOON;
-    if (strstr(help, "-device"))
+    if (strstr(help, "-device")) {
         flags |= QEMUD_CMD_FLAG_DEVICE;
+        /*
+         * When -device was introduced, qemu already supported drive's
+         * readonly option but didn't advertise that.
+         */
+        flags |= QEMUD_CMD_FLAG_DRIVE_READONLY;
+    }
     if (strstr(help, "-nodefconfig"))
         flags |= QEMUD_CMD_FLAG_NODEFCONFIG;
     /* The trailing ' ' is important to avoid a bogus match */
@@ -2688,7 +2696,7 @@ qemuBuildDriveStr(virDomainDiskDefPtr disk,
         disk->bus != VIR_DOMAIN_DISK_BUS_IDE)
         virBufferAddLit(&opt, ",boot=on");
     if (disk->readonly &&
-        qemuCmdFlags & QEMUD_CMD_FLAG_DEVICE)
+        qemuCmdFlags & QEMUD_CMD_FLAG_DRIVE_READONLY)
         virBufferAddLit(&opt, ",readonly=on");
     if (disk->driverType && *disk->driverType != '\0' &&
         disk->type != VIR_DOMAIN_DISK_TYPE_DIR &&

src/qemu/qemu_conf.h

@@ -96,6 +96,7 @@ enum qemud_cmd_flags {
     QEMUD_CMD_FLAG_FSDEV         = (1LL << 40), /* -fstype filesystem passthrough */
     QEMUD_CMD_FLAG_NESTING       = (1LL << 41), /* -enable-nesting (SVM/VMX) */
     QEMUD_CMD_FLAG_NAME_PROCESS  = (1LL << 42), /* Is -name process= available */
+    QEMUD_CMD_FLAG_DRIVE_READONLY    = (1LL << 43), /* -drive readonly=on|off */
 };
 
 /* Main driver state */

tests/qemuhelpdata/kvm-83-rhel56

@@ -0,0 +1,141 @@
+QEMU PC emulator version 0.9.1 (kvm-83-maint-snapshot-20090205), Copyright (c) 2003-2008 Fabrice Bellard
+usage: qemu [options] [disk_image]
+
+'disk_image' is a raw hard image image for IDE hard disk 0
+
+Standard options:
+-M machine      select emulated machine (-M ? for list)
+-cpu cpu        select CPU (-cpu ? for list)
+-fda/-fdb file  use 'file' as floppy disk 0/1 image
+-hda/-hdb file  use 'file' as IDE hard disk 0/1 image
+-hdc/-hdd file  use 'file' as IDE hard disk 2/3 image
+-cdrom file     use 'file' as IDE cdrom image (cdrom is ide1 master)
+-drive [file=file][,if=type][,bus=n][,unit=m][,media=d][,index=i]
+       [,cyls=c,heads=h,secs=s[,trans=t]][,snapshot=on|off]
+       [,cache=writethrough|writeback|none|unsafe][,format=f][,serial=s]
+       [,boot=on|off][,readonly=on|off]
+                use 'file' as a drive image
+-mtdblock file  use 'file' as on-board Flash memory image
+-sd file        use 'file' as SecureDigital card image
+-pflash file    use 'file' as a parallel flash image
+-boot [a|c|d|n] boot on floppy (a), hard disk (c), CD-ROM (d), or network (n)
+-snapshot       write to temporary files instead of disk image files
+-no-frame       open SDL window without a frame and window decorations
+-alt-grab       use Ctrl-Alt-Shift to grab mouse (instead of Ctrl-Alt)
+-no-quit        disable SDL window close capability
+-no-fd-bootchk  disable boot signature checking for floppy disks
+-m megs         set virtual RAM size to megs MB [default=128]
+-smp n          set the number of CPUs to 'n' [default=1]
+-nographic      disable graphical output and redirect serial I/Os to console
+-portrait       rotate graphical output 90 deg left (only PXA LCD)
+-k language     use keyboard layout (for example "fr" for French)
+-audio-help     print list of audio drivers and their options
+-soundhw c1,... enable audio support
+                and only specified sound cards (comma separated list)
+                use -soundhw ? to get the list of supported cards
+                use -soundhw all to enable all of them
+-vga [std|cirrus]
+                select video card type
+-localtime      set the real time clock to local time [default=utc]
+-full-screen    start in full screen
+-win2k-hack     use it when installing Windows 2000 to avoid a disk full bug
+-rtc-td-hack    use it to fix time drift in Windows ACPI HAL
+-usb            enable the USB driver (will be the default soon)
+-usbdevice name add the host or guest USB device 'name'
+-name string    set the name of the guest
+-uuid %08x-%04x-%04x-%04x-%012x specify machine UUID
+-notify event   enable async-notifications for event
+-qxl <num>[,ram=megs]
+                use 'num' qxl display devices, each with RAM size of 'megs' MB
+                [default=64]
+-spice <args>   use spice
+-spice-help     show spice usage
+
+Network options:
+-net nic[,vlan=n][,macaddr=addr][,model=type][,name=str]
+                create a new Network Interface Card and connect it to VLAN 'n'
+-net user[,vlan=n][,name=str][,hostname=host]
+                connect the user mode network stack to VLAN 'n' and send
+                hostname 'host' to DHCP clients
+-net tap[,vlan=n][,name=str][,fd=h][,ifname=name][,script=file][,downscript=dfile]
+                connect the host TAP network interface to VLAN 'n' and use the
+                network scripts 'file' (default=/etc/qemu-ifup)
+                and 'dfile' (default=/etc/qemu-ifdown);
+                use '[down]script=no' to disable script execution;
+                use 'fd=h' to connect to an already opened TAP interface
+-net socket[,vlan=n][,name=str][,fd=h][,listen=[host]:port][,connect=host:port]
+                connect the vlan 'n' to another VLAN using a socket connection
+-net socket[,vlan=n][,name=str][,fd=h][,mcast=maddr:port]
+                connect the vlan 'n' to multicast maddr and port
+-net none       use it alone to have zero network devices; if no -net option
+                is provided, the default is '-net nic -net user'
+
+-tftp dir       allow tftp access to files in dir [-net user]
+-bootp file     advertise file in BOOTP replies
+-redir [tcp|udp]:host-port:[guest-host]:guest-port
+                redirect TCP or UDP connections from host to guest [-net user]
+
+Linux boot specific:
+-kernel bzImage use 'bzImage' as kernel image
+-append cmdline use 'cmdline' as kernel command line
+-initrd file    use 'file' as initial ram disk
+
+Debug/Expert options:
+-monitor dev    redirect the monitor to char device 'dev'
+-vmchannel di:DI,dev  redirect the hypercall device with device id DI, to char device 'dev'
+-serial dev     redirect the serial port to char device 'dev'
+-parallel dev   redirect the parallel port to char device 'dev'
+-pidfile file   Write PID to 'file'
+-S              freeze CPU at startup (use 'c' to start execution)
+-s              wait gdb connection to port
+-p port         set gdb connection port [default=1234]
+-d item1,...    output log to /tmp/qemu.log (use -d ? for a list of log items)
+-hdachs c,h,s[,t]  force hard disk 0 physical geometry and the optional BIOS
+                translation (t=none or lba) (usually qemu can guess them)
+-L path         set the directory for the BIOS, VGA BIOS and keymaps
+-no-kvm         disable KVM hardware virtualization
+-no-kvm-irqchip disable KVM kernel mode PIC/IOAPIC/LAPIC
+-no-kvm-pit	    disable KVM kernel mode PIT
+-no-kvm-pit-reinjection disable KVM kernel mode PIT interrupt reinjection
+-pcidevice host=bus:dev.func[,dma=none][,name=string]
+                expose a PCI device to the guest OS.
+                dma=none: don't perform any dma translations (default is to use an iommu)
+                'string' is used in log output.
+-no-acpi        disable ACPI
+-no-hpet        disable HPET
+-balloon none   disable balloon device
+-balloon virtio
+                enable virtio balloon device (default)
+-acpitable [sig=str][,rev=n][,oem_id=str][,oem_table_id=str][,oem_rev=n][,asl_compiler_id=str][,asl_compiler_rev=n][,data=file1[:file2]...]
+                ACPI table description
+-smbios file=binary
+                Load SMBIOS entry from binary file
+-smbios type=0[,vendor=str][,version=str][,date=str][,release=%d.%d]
+                Specify SMBIOS type 0 fields
+-smbios type=1[,manufacturer=str][,product=str][,version=str][,serial=str]
+              [,uuid=uuid][,sku=str][,family=str]
+                Specify SMBIOS type 1 fields
+-no-reboot      exit instead of rebooting
+-no-shutdown    stop before shutdown
+-loadvm [tag|id]  start right away with a saved state (loadvm in monitor)
+-vnc display    start a VNC server on display
+-daemonize      daemonize QEMU after initializing
+-tdf            inject timer interrupts that got lost
+-kvm-shadow-memory megs set the amount of shadow pages to be allocated
+-mem-path       set the path to hugetlbfs/tmpfs mounted directory, also
+                enables allocation of guest memory with huge pages
+-mem-prealloc   toggles preallocation of -mem-path backed physical memory
+                at startup.  Default is enabled.
+-option-rom rom load a file, rom, into the option ROM space
+-clock          force the use of the given methods for timer alarm.
+                To see what timers are available use -clock ?
+-startdate      select initial date of the clock
+-icount [N|auto]
+                Enable virtual instruction counter with 2^N clock ticks per instruction
+
+During emulation, the following keys are useful:
+ctrl-alt-f      toggle full screen
+ctrl-alt-n      switch to virtual console 'n'
+ctrl-alt        toggle mouse and keyboard grab
+
+When using -nographic, press 'ctrl-a h' to get some help.

tests/qemuhelptest.c

@@ -130,6 +130,30 @@ mymain(int argc, char **argv)
             QEMUD_CMD_FLAG_MEM_PATH |
             QEMUD_CMD_FLAG_TDF,
             9001,  1, 74);
+    DO_TEST("kvm-83-rhel56",
+            QEMUD_CMD_FLAG_VNC_COLON |
+            QEMUD_CMD_FLAG_NO_REBOOT |
+            QEMUD_CMD_FLAG_DRIVE |
+            QEMUD_CMD_FLAG_DRIVE_BOOT |
+            QEMUD_CMD_FLAG_NAME |
+            QEMUD_CMD_FLAG_UUID |
+            QEMUD_CMD_FLAG_VNET_HDR |
+            QEMUD_CMD_FLAG_MIGRATE_QEMU_TCP |
+            QEMUD_CMD_FLAG_MIGRATE_QEMU_EXEC |
+            QEMUD_CMD_FLAG_DRIVE_CACHE_V2 |
+            QEMUD_CMD_FLAG_KVM |
+            QEMUD_CMD_FLAG_DRIVE_FORMAT |
+            QEMUD_CMD_FLAG_DRIVE_SERIAL |
+            QEMUD_CMD_FLAG_VGA |
+            QEMUD_CMD_FLAG_PCIDEVICE |
+            QEMUD_CMD_FLAG_MEM_PATH |
+            QEMUD_CMD_FLAG_BALLOON |
+            QEMUD_CMD_FLAG_RTC_TD_HACK |
+            QEMUD_CMD_FLAG_NO_HPET |
+            QEMUD_CMD_FLAG_NO_KVM_PIT |
+            QEMUD_CMD_FLAG_TDF |
+            QEMUD_CMD_FLAG_DRIVE_READONLY,
+            9001, 1,  83);
     DO_TEST("qemu-0.10.5",
             QEMUD_CMD_FLAG_KQEMU |
             QEMUD_CMD_FLAG_VNC_COLON |
@@ -238,6 +262,7 @@ mymain(int argc, char **argv)
             QEMUD_CMD_FLAG_DRIVE_CACHE_V2 |
             QEMUD_CMD_FLAG_DRIVE_FORMAT |
             QEMUD_CMD_FLAG_DRIVE_SERIAL |
+            QEMUD_CMD_FLAG_DRIVE_READONLY |
             QEMUD_CMD_FLAG_VGA |
             QEMUD_CMD_FLAG_0_10 |
             QEMUD_CMD_FLAG_ENABLE_KVM |
@@ -267,6 +292,7 @@ mymain(int argc, char **argv)
             QEMUD_CMD_FLAG_KVM |
             QEMUD_CMD_FLAG_DRIVE_FORMAT |
             QEMUD_CMD_FLAG_DRIVE_SERIAL |
+            QEMUD_CMD_FLAG_DRIVE_READONLY |
             QEMUD_CMD_FLAG_VGA |
             QEMUD_CMD_FLAG_0_10 |
             QEMUD_CMD_FLAG_PCIDEVICE |

tests/qemuxml2argvdata/qemuxml2argv-disk-drive-readonly-no-device.args

@@ -0,0 +1 @@
+LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M pc -m 214 -smp 1 -nographic -monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -drive file=/dev/HostVG/QEMUGuest1,if=ide,bus=0,unit=0 -drive file=/dev/sr0,if=ide,media=cdrom,bus=1,unit=0,readonly=on -net none -serial none -parallel none -usb

tests/qemuxml2argvdata/qemuxml2argv-disk-drive-readonly-no-device.xml

@@ -0,0 +1,31 @@
+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory>219200</memory>
+  <currentMemory>219200</currentMemory>
+  <vcpu>1</vcpu>
+  <os>
+    <type arch='i686' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu</emulator>
+    <disk type='block' device='disk'>
+      <source dev='/dev/HostVG/QEMUGuest1'/>
+      <target dev='hda' bus='ide'/>
+      <address type='drive' controller='0' bus='0' unit='0'/>
+    </disk>
+    <disk type='block' device='cdrom'>
+       <source dev='/dev/sr0'/>
+       <target dev='hdc' bus='ide'/>
+       <readonly/>
+       <address type='drive' controller='0' bus='1' unit='0'/>
+    </disk>
+    <controller type='ide' index='0'/>
+    <memballoon model='virtio'/>
+  </devices>
+</domain>

tests/qemuxml2argvtest.c

@@ -276,7 +276,10 @@ mymain(int argc, char **argv)
     DO_TEST("disk-drive-fat", QEMUD_CMD_FLAG_DRIVE |
             QEMUD_CMD_FLAG_DRIVE_BOOT | QEMUD_CMD_FLAG_DRIVE_FORMAT, false);
     DO_TEST("disk-drive-readonly-disk", QEMUD_CMD_FLAG_DRIVE |
-            QEMUD_CMD_FLAG_DEVICE | QEMUD_CMD_FLAG_NODEFCONFIG, false);
+            QEMUD_CMD_FLAG_DRIVE_READONLY | QEMUD_CMD_FLAG_DEVICE |
+            QEMUD_CMD_FLAG_NODEFCONFIG, false);
+    DO_TEST("disk-drive-readonly-no-device", QEMUD_CMD_FLAG_DRIVE |
+            QEMUD_CMD_FLAG_DRIVE_READONLY | QEMUD_CMD_FLAG_NODEFCONFIG, false);
     DO_TEST("disk-drive-fmt-qcow", QEMUD_CMD_FLAG_DRIVE |
             QEMUD_CMD_FLAG_DRIVE_BOOT | QEMUD_CMD_FLAG_DRIVE_FORMAT, false);
     DO_TEST("disk-drive-shared", QEMUD_CMD_FLAG_DRIVE |