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[PATCH] bhyve: implement virtio-9p support

Roman Bogorodskiy posted 1 patch 3 years, 6 months ago
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Patches applied successfully (tree, apply log)
git fetch https://github.com/patchew-project/libvirt tags/patchew/20201008130616.92236-1-bogorodskiy@gmail.com
src/bhyve/bhyve_capabilities.c                | 14 ++++
src/bhyve/bhyve_capabilities.h                |  1 +
src/bhyve/bhyve_command.c                     | 72 +++++++++++++++++++
src/bhyve/bhyve_device.c                      | 10 +++
src/libvirt_private.syms                      |  1 +
.../bhyvexml2argv-fs-9p-readonly.args         | 10 +++
.../bhyvexml2argv-fs-9p-readonly.ldargs       |  3 +
.../bhyvexml2argv-fs-9p-readonly.xml          | 28 ++++++++
...exml2argv-fs-9p-unsupported-accessmode.xml | 27 +++++++
...bhyvexml2argv-fs-9p-unsupported-driver.xml | 28 ++++++++
.../bhyvexml2argv-fs-9p.args                  | 10 +++
.../bhyvexml2argv-fs-9p.ldargs                |  3 +
.../bhyvexml2argvdata/bhyvexml2argv-fs-9p.xml | 27 +++++++
tests/bhyvexml2argvtest.c                     |  9 ++-
.../bhyvexml2xmlout-fs-9p.xml                 | 38 ++++++++++
tests/bhyvexml2xmltest.c                      |  1 +
16 files changed, 281 insertions(+), 1 deletion(-)
create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.args
create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.ldargs
create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.xml
create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-unsupported-accessmode.xml
create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-unsupported-driver.xml
create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p.args
create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p.ldargs
create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p.xml
create mode 100644 tests/bhyvexml2xmloutdata/bhyvexml2xmlout-fs-9p.xml
[PATCH] bhyve: implement virtio-9p support
Posted by Roman Bogorodskiy 3 years, 6 months ago 
Recently virtio-9p support was added to bhyve.

On the host side it looks this way:

  bhyve .... -s 25:0,virtio-9p,sharename=/path/to/shared/dir

It could also have ",ro" suffix to make share read-only.

In the Linux guest, this share is mounted with:

  mount -t 9p sharename /mnt/sharename

In the guest user will see the same permissions and ownership
information for this directory as on the host. No uid/gid remapping is
supported, so those could resolve to wrong user or group names.

The same applies to the other side: chowning/chmodding in the guest will
set specified ownership and permissions on the host.

In libvirt domain XML it's modeled using the 'filesystem' element:

  <filesystem type='mount'>
    <source dir='/path/to/shared/dir'/>
    <target dir='sharename'/>
  </filesystem>

Optional 'readonly' sub-element enables read-only mode.

Signed-off-by: Roman Bogorodskiy <bogorodskiy@gmail.com>
---
 src/bhyve/bhyve_capabilities.c                | 14 ++++
 src/bhyve/bhyve_capabilities.h                |  1 +
 src/bhyve/bhyve_command.c                     | 72 +++++++++++++++++++
 src/bhyve/bhyve_device.c                      | 10 +++
 src/libvirt_private.syms                      |  1 +
 .../bhyvexml2argv-fs-9p-readonly.args         | 10 +++
 .../bhyvexml2argv-fs-9p-readonly.ldargs       |  3 +
 .../bhyvexml2argv-fs-9p-readonly.xml          | 28 ++++++++
 ...exml2argv-fs-9p-unsupported-accessmode.xml | 27 +++++++
 ...bhyvexml2argv-fs-9p-unsupported-driver.xml | 28 ++++++++
 .../bhyvexml2argv-fs-9p.args                  | 10 +++
 .../bhyvexml2argv-fs-9p.ldargs                |  3 +
 .../bhyvexml2argvdata/bhyvexml2argv-fs-9p.xml | 27 +++++++
 tests/bhyvexml2argvtest.c                     |  9 ++-
 .../bhyvexml2xmlout-fs-9p.xml                 | 38 ++++++++++
 tests/bhyvexml2xmltest.c                      |  1 +
 16 files changed, 281 insertions(+), 1 deletion(-)
 create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.args
 create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.ldargs
 create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.xml
 create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-unsupported-accessmode.xml
 create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-unsupported-driver.xml
 create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p.args
 create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p.ldargs
 create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p.xml
 create mode 100644 tests/bhyvexml2xmloutdata/bhyvexml2xmlout-fs-9p.xml

diff --git a/src/bhyve/bhyve_capabilities.c b/src/bhyve/bhyve_capabilities.c
index 96cfe8357a..8a9acf52b0 100644
--- a/src/bhyve/bhyve_capabilities.c
+++ b/src/bhyve/bhyve_capabilities.c
@@ -344,6 +344,17 @@ bhyveProbeCapsVNCPassword(unsigned int *caps, char *binary)
 }
 
 
+static int
+bhyveProbeCapsVirtio9p(unsigned int *caps, char *binary)
+{
+    return bhyveProbeCapsDeviceHelper(caps, binary,
+                                      "-s",
+                                      "0,virtio-9p",
+                                      "pci slot 0:0: unknown device \"hda\"",
+                                      BHYVE_CAP_VIRTIO_9P);
+}
+
+
 int
 virBhyveProbeCaps(unsigned int *caps)
 {
@@ -378,6 +389,9 @@ virBhyveProbeCaps(unsigned int *caps)
     if ((ret = bhyveProbeCapsVNCPassword(caps, binary)))
         goto out;
 
+    if ((ret = bhyveProbeCapsVirtio9p(caps, binary)))
+        goto out;
+
  out:
     VIR_FREE(binary);
     return ret;
diff --git a/src/bhyve/bhyve_capabilities.h b/src/bhyve/bhyve_capabilities.h
index b2a16b0189..1b25c000b5 100644
--- a/src/bhyve/bhyve_capabilities.h
+++ b/src/bhyve/bhyve_capabilities.h
@@ -51,6 +51,7 @@ typedef enum {
     BHYVE_CAP_CPUTOPOLOGY = 1 << 6,
     BHYVE_CAP_SOUND_HDA = 1 << 7,
     BHYVE_CAP_VNC_PASSWORD = 1 << 8,
+    BHYVE_CAP_VIRTIO_9P = 1 << 9,
 } virBhyveCapsFlags;
 
 int virBhyveProbeGrubCaps(virBhyveGrubCapsFlags *caps);
diff --git a/src/bhyve/bhyve_command.c b/src/bhyve/bhyve_command.c
index 7526f10fb1..7606840f45 100644
--- a/src/bhyve/bhyve_command.c
+++ b/src/bhyve/bhyve_command.c
@@ -547,6 +547,73 @@ bhyveBuildSoundArgStr(const virDomainDef *def G_GNUC_UNUSED,
     return 0;
 }
 
+static int
+bhyveBuildFSArgStr(const virDomainDef *def G_GNUC_UNUSED,
+                   virDomainFSDefPtr fs,
+                   virCommandPtr cmd)
+{
+    g_auto(virBuffer) params = VIR_BUFFER_INITIALIZER;
+
+    switch ((virDomainFSType) fs->type) {
+    case VIR_DOMAIN_FS_TYPE_MOUNT:
+        break;
+    case VIR_DOMAIN_FS_TYPE_BLOCK:
+    case VIR_DOMAIN_FS_TYPE_FILE:
+    case VIR_DOMAIN_FS_TYPE_TEMPLATE:
+    case VIR_DOMAIN_FS_TYPE_RAM:
+    case VIR_DOMAIN_FS_TYPE_BIND:
+    case VIR_DOMAIN_FS_TYPE_VOLUME:
+    case VIR_DOMAIN_FS_TYPE_LAST:
+        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+                       _("unsupported filesystem type '%s'"),
+                       virDomainFSTypeToString(fs->type));
+        return -1;
+    }
+
+    switch (fs->fsdriver) {
+    case VIR_DOMAIN_FS_DRIVER_TYPE_DEFAULT:
+        /* The only supported driver by bhyve currently */
+        break;
+    case VIR_DOMAIN_FS_DRIVER_TYPE_VIRTIOFS:
+    case VIR_DOMAIN_FS_DRIVER_TYPE_PATH:
+    case VIR_DOMAIN_FS_DRIVER_TYPE_HANDLE:
+    case VIR_DOMAIN_FS_DRIVER_TYPE_LOOP:
+    case VIR_DOMAIN_FS_DRIVER_TYPE_NBD:
+    case VIR_DOMAIN_FS_DRIVER_TYPE_PLOOP:
+    case VIR_DOMAIN_FS_DRIVER_TYPE_LAST:
+        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+                       _("unsupported filesystem driver '%s'"),
+                       virDomainFSDriverTypeToString(fs->fsdriver));
+        return -1;
+    }
+
+    switch (fs->accessmode) {
+    case VIR_DOMAIN_FS_ACCESSMODE_PASSTHROUGH:
+        /* This is the only supported mode for now, does not need specific configuration */
+        break;
+    case VIR_DOMAIN_FS_ACCESSMODE_MAPPED:
+    case VIR_DOMAIN_FS_ACCESSMODE_SQUASH:
+    case VIR_DOMAIN_FS_ACCESSMODE_LAST:
+        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+                       _("unsupported filesystem accessmode '%s'"),
+                       virDomainFSAccessModeTypeToString(fs->accessmode));
+        return -1;
+    }
+
+    if (fs->readonly)
+        virBufferAddLit(&params, ",ro");
+
+    virCommandAddArg(cmd, "-s");
+    virCommandAddArgFormat(cmd, "%d:%d,virtio-9p,%s=%s%s",
+                           fs->info.addr.pci.slot,
+                           fs->info.addr.pci.function,
+                           fs->src->path,
+                           fs->dst,
+                           virBufferCurrentContent(&params));
+
+    return 0;
+}
+
 virCommandPtr
 virBhyveProcessBuildBhyveCmd(bhyveConnPtr driver, virDomainDefPtr def,
                              bool dryRun)
@@ -699,6 +766,11 @@ virBhyveProcessBuildBhyveCmd(bhyveConnPtr driver, virDomainDefPtr def,
             goto error;
     }
 
+    for (i = 0; i < def->nfss; i++) {
+        if (bhyveBuildFSArgStr(def, def->fss[i], cmd) < 0)
+            goto error;
+    }
+
     if (bhyveBuildConsoleArgStr(def, cmd) < 0)
         goto error;
 
diff --git a/src/bhyve/bhyve_device.c b/src/bhyve/bhyve_device.c
index e2e1efd97e..f8c7522d26 100644
--- a/src/bhyve/bhyve_device.c
+++ b/src/bhyve/bhyve_device.c
@@ -175,6 +175,16 @@ bhyveAssignDevicePCISlots(virDomainDefPtr def,
             return -1;
     }
 
+    for (i = 0; i < def->nfss; i++) {
+        if (!virDeviceInfoPCIAddressIsWanted(&def->fss[i]->info))
+            continue;
+        if (virDomainPCIAddressReserveNextAddr(addrs,
+                                               &def->fss[i]->info,
+                                               VIR_PCI_CONNECT_TYPE_PCI_DEVICE,
+                                               -1) < 0)
+            return -1;
+    }
+
     return 0;
 }
 
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 7cf8bea962..ae82172b90 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -402,6 +402,7 @@ virDomainDiskSourceFormat;
 virDomainDiskTranslateSourcePool;
 virDomainFeatureTypeFromString;
 virDomainFeatureTypeToString;
+virDomainFSAccessModeTypeToString;
 virDomainFSCacheModeTypeToString;
 virDomainFSDefFree;
 virDomainFSDefNew;
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.args b/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.args
new file mode 100644
index 0000000000..193895574d
--- /dev/null
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.args
@@ -0,0 +1,10 @@
+/usr/sbin/bhyve \
+-c 1 \
+-m 214 \
+-u \
+-H \
+-P \
+-s 0:0,hostbridge \
+-s 2:0,ahci,hd:/tmp/freebsd.img \
+-s 3:0,virtio-net,faketapdev,mac=52:54:00:b9:94:02 \
+-s 4:0,virtio-9p,/shared/dir=shared_dir,ro bhyve
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.ldargs b/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.ldargs
new file mode 100644
index 0000000000..32538b558e
--- /dev/null
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.ldargs
@@ -0,0 +1,3 @@
+/usr/sbin/bhyveload \
+-m 214 \
+-d /tmp/freebsd.img bhyve
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.xml b/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.xml
new file mode 100644
index 0000000000..6341236654
--- /dev/null
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.xml
@@ -0,0 +1,28 @@
+<domain type='bhyve'>
+  <name>bhyve</name>
+  <uuid>df3be7e7-a104-11e3-aeb0-50e5492bd3dc</uuid>
+  <memory>219136</memory>
+  <vcpu>1</vcpu>
+  <os>
+    <type>hvm</type>
+  </os>
+  <devices>
+    <disk type='file'>
+      <driver name='file' type='raw'/>
+      <source file='/tmp/freebsd.img'/>
+      <target dev='hda' bus='sata'/>
+      <address type='drive' controller='0' bus='0' target='2' unit='0'/>
+    </disk>
+    <interface type='bridge'>
+      <mac address='52:54:00:b9:94:02'/>
+      <model type='virtio'/>
+      <source bridge="virbr0"/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
+    </interface>
+    <filesystem>
+      <source dir='/shared/dir'/>
+      <target dir='shared_dir'/>
+      <readonly/>
+    </filesystem>
+  </devices>
+</domain>
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-unsupported-accessmode.xml b/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-unsupported-accessmode.xml
new file mode 100644
index 0000000000..f7d8ce5712
--- /dev/null
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-unsupported-accessmode.xml
@@ -0,0 +1,27 @@
+<domain type='bhyve'>
+  <name>bhyve</name>
+  <uuid>df3be7e7-a104-11e3-aeb0-50e5492bd3dc</uuid>
+  <memory>219136</memory>
+  <vcpu>1</vcpu>
+  <os>
+    <type>hvm</type>
+  </os>
+  <devices>
+    <disk type='file'>
+      <driver name='file' type='raw'/>
+      <source file='/tmp/freebsd.img'/>
+      <target dev='hda' bus='sata'/>
+      <address type='drive' controller='0' bus='0' target='2' unit='0'/>
+    </disk>
+    <interface type='bridge'>
+      <mac address='52:54:00:b9:94:02'/>
+      <model type='virtio'/>
+      <source bridge="virbr0"/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
+    </interface>
+    <filesystem accessmode='mapped'>
+      <source dir='/shared/dir'/>
+      <target dir='shared_dir'/>
+    </filesystem>
+  </devices>
+</domain>
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-unsupported-driver.xml b/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-unsupported-driver.xml
new file mode 100644
index 0000000000..3072e6a687
--- /dev/null
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-unsupported-driver.xml
@@ -0,0 +1,28 @@
+<domain type='bhyve'>
+  <name>bhyve</name>
+  <uuid>df3be7e7-a104-11e3-aeb0-50e5492bd3dc</uuid>
+  <memory>219136</memory>
+  <vcpu>1</vcpu>
+  <os>
+    <type>hvm</type>
+  </os>
+  <devices>
+    <disk type='file'>
+      <driver name='file' type='raw'/>
+      <source file='/tmp/freebsd.img'/>
+      <target dev='hda' bus='sata'/>
+      <address type='drive' controller='0' bus='0' target='2' unit='0'/>
+    </disk>
+    <interface type='bridge'>
+      <mac address='52:54:00:b9:94:02'/>
+      <model type='virtio'/>
+      <source bridge="virbr0"/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
+    </interface>
+    <filesystem>
+      <driver type='loop'/>
+      <source dir='/shared/dir'/>
+      <target dir='shared_dir'/>
+    </filesystem>
+  </devices>
+</domain>
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p.args b/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p.args
new file mode 100644
index 0000000000..0d27954432
--- /dev/null
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p.args
@@ -0,0 +1,10 @@
+/usr/sbin/bhyve \
+-c 1 \
+-m 214 \
+-u \
+-H \
+-P \
+-s 0:0,hostbridge \
+-s 2:0,ahci,hd:/tmp/freebsd.img \
+-s 3:0,virtio-net,faketapdev,mac=52:54:00:b9:94:02 \
+-s 4:0,virtio-9p,/shared/dir=shared_dir bhyve
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p.ldargs b/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p.ldargs
new file mode 100644
index 0000000000..32538b558e
--- /dev/null
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p.ldargs
@@ -0,0 +1,3 @@
+/usr/sbin/bhyveload \
+-m 214 \
+-d /tmp/freebsd.img bhyve
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p.xml b/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p.xml
new file mode 100644
index 0000000000..22b8edc69f
--- /dev/null
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p.xml
@@ -0,0 +1,27 @@
+<domain type='bhyve'>
+  <name>bhyve</name>
+  <uuid>df3be7e7-a104-11e3-aeb0-50e5492bd3dc</uuid>
+  <memory>219136</memory>
+  <vcpu>1</vcpu>
+  <os>
+    <type>hvm</type>
+  </os>
+  <devices>
+    <disk type='file'>
+      <driver name='file' type='raw'/>
+      <source file='/tmp/freebsd.img'/>
+      <target dev='hda' bus='sata'/>
+      <address type='drive' controller='0' bus='0' target='2' unit='0'/>
+    </disk>
+    <interface type='bridge'>
+      <mac address='52:54:00:b9:94:02'/>
+      <model type='virtio'/>
+      <source bridge="virbr0"/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
+    </interface>
+    <filesystem>
+      <source dir='/shared/dir'/>
+      <target dir='shared_dir'/>
+    </filesystem>
+  </devices>
+</domain>
diff --git a/tests/bhyvexml2argvtest.c b/tests/bhyvexml2argvtest.c
index def2acc15c..be816e554f 100644
--- a/tests/bhyvexml2argvtest.c
+++ b/tests/bhyvexml2argvtest.c
@@ -167,7 +167,7 @@ mymain(void)
                        BHYVE_CAP_NET_E1000 | BHYVE_CAP_LPC_BOOTROM | \
                        BHYVE_CAP_FBUF | BHYVE_CAP_XHCI | \
                        BHYVE_CAP_CPUTOPOLOGY | BHYVE_CAP_SOUND_HDA | \
-                       BHYVE_CAP_VNC_PASSWORD;
+                       BHYVE_CAP_VNC_PASSWORD | BHYVE_CAP_VIRTIO_9P;
 
     DO_TEST("base");
     DO_TEST("wired");
@@ -208,6 +208,13 @@ mymain(void)
     DO_TEST("sound");
     DO_TEST("isa-controller");
     DO_TEST_FAILURE("isa-multiple-controllers");
+    DO_TEST("fs-9p");
+    DO_TEST("fs-9p-readonly");
+    DO_TEST_FAILURE("fs-9p-unsupported-type");
+    DO_TEST_FAILURE("fs-9p-unsupported-driver");
+    DO_TEST_FAILURE("fs-9p-unsupported-accessmode");
+    driver.bhyvecaps &= ~BHYVE_CAP_VIRTIO_9P;
+    DO_TEST_FAILURE("fs-9p");
 
     /* Address allocation tests */
     DO_TEST("addr-single-sata-disk");
diff --git a/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-fs-9p.xml b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-fs-9p.xml
new file mode 100644
index 0000000000..db3faf29ef
--- /dev/null
+++ b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-fs-9p.xml
@@ -0,0 +1,38 @@
+<domain type='bhyve'>
+  <name>bhyve</name>
+  <uuid>df3be7e7-a104-11e3-aeb0-50e5492bd3dc</uuid>
+  <memory unit='KiB'>219136</memory>
+  <currentMemory unit='KiB'>219136</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='x86_64'>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>
+    <disk type='file' device='disk'>
+      <driver name='file' type='raw'/>
+      <source file='/tmp/freebsd.img'/>
+      <target dev='hda' bus='sata'/>
+      <address type='drive' controller='0' bus='0' target='2' unit='0'/>
+    </disk>
+    <controller type='pci' index='0' model='pci-root'/>
+    <controller type='sata' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
+    </controller>
+    <filesystem type='mount' accessmode='passthrough'>
+      <source dir='/shared/dir'/>
+      <target dir='shared_dir'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
+    </filesystem>
+    <interface type='bridge'>
+      <mac address='52:54:00:b9:94:02'/>
+      <source bridge='virbr0'/>
+      <model type='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
+    </interface>
+  </devices>
+</domain>
diff --git a/tests/bhyvexml2xmltest.c b/tests/bhyvexml2xmltest.c
index 8808d5a8fa..eb9b108704 100644
--- a/tests/bhyvexml2xmltest.c
+++ b/tests/bhyvexml2xmltest.c
@@ -112,6 +112,7 @@ mymain(void)
     DO_TEST_DIFFERENT("msrs");
     DO_TEST_DIFFERENT("sound");
     DO_TEST_DIFFERENT("isa-controller");
+    DO_TEST_DIFFERENT("fs-9p");
 
     /* Address allocation tests */
     DO_TEST_DIFFERENT("addr-single-sata-disk");
-- 
2.28.0
Re: [PATCH] bhyve: implement virtio-9p support
Posted by Roman Bogorodskiy 3 years, 6 months ago 
  Roman Bogorodskiy wrote:

> Recently virtio-9p support was added to bhyve.
> 
> On the host side it looks this way:
> 
>   bhyve .... -s 25:0,virtio-9p,sharename=/path/to/shared/dir
> 
> It could also have ",ro" suffix to make share read-only.
> 
> In the Linux guest, this share is mounted with:
> 
>   mount -t 9p sharename /mnt/sharename
> 
> In the guest user will see the same permissions and ownership
> information for this directory as on the host. No uid/gid remapping is
> supported, so those could resolve to wrong user or group names.
> 
> The same applies to the other side: chowning/chmodding in the guest will
> set specified ownership and permissions on the host.
> 
> In libvirt domain XML it's modeled using the 'filesystem' element:
> 
>   <filesystem type='mount'>
>     <source dir='/path/to/shared/dir'/>
>     <target dir='sharename'/>
>   </filesystem>
> 
> Optional 'readonly' sub-element enables read-only mode.
> 
> Signed-off-by: Roman Bogorodskiy <bogorodskiy@gmail.com>
> ---
>  src/bhyve/bhyve_capabilities.c                | 14 ++++
>  src/bhyve/bhyve_capabilities.h                |  1 +
>  src/bhyve/bhyve_command.c                     | 72 +++++++++++++++++++
>  src/bhyve/bhyve_device.c                      | 10 +++
>  src/libvirt_private.syms                      |  1 +
>  .../bhyvexml2argv-fs-9p-readonly.args         | 10 +++
>  .../bhyvexml2argv-fs-9p-readonly.ldargs       |  3 +
>  .../bhyvexml2argv-fs-9p-readonly.xml          | 28 ++++++++
>  ...exml2argv-fs-9p-unsupported-accessmode.xml | 27 +++++++
>  ...bhyvexml2argv-fs-9p-unsupported-driver.xml | 28 ++++++++
>  .../bhyvexml2argv-fs-9p.args                  | 10 +++
>  .../bhyvexml2argv-fs-9p.ldargs                |  3 +
>  .../bhyvexml2argvdata/bhyvexml2argv-fs-9p.xml | 27 +++++++
>  tests/bhyvexml2argvtest.c                     |  9 ++-
>  .../bhyvexml2xmlout-fs-9p.xml                 | 38 ++++++++++
>  tests/bhyvexml2xmltest.c                      |  1 +
>  16 files changed, 281 insertions(+), 1 deletion(-)
>  create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.args
>  create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.ldargs
>  create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.xml
>  create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-unsupported-accessmode.xml
>  create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-unsupported-driver.xml
>  create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p.args
>  create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p.ldargs
>  create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p.xml
>  create mode 100644 tests/bhyvexml2xmloutdata/bhyvexml2xmlout-fs-9p.xml

This is missing
tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-unsupported-type.xml

It doesn't seem to be important enough to justify sending v2 just
because of it, so it's here:

https://gitlab.com/rbogorodskiy/libvirt/-/blob/bhyve-9p/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-unsupported-type.xml

Roman Bogorodskiy
Re: [PATCH] bhyve: implement virtio-9p support
Posted by Michal Privoznik 3 years, 6 months ago 
On 10/8/20 3:18 PM, Roman Bogorodskiy wrote:
>    Roman Bogorodskiy wrote:
> 
>> Recently virtio-9p support was added to bhyve.
>>
>> On the host side it looks this way:
>>
>>    bhyve .... -s 25:0,virtio-9p,sharename=/path/to/shared/dir
>>
>> It could also have ",ro" suffix to make share read-only.
>>
>> In the Linux guest, this share is mounted with:
>>
>>    mount -t 9p sharename /mnt/sharename
>>
>> In the guest user will see the same permissions and ownership
>> information for this directory as on the host. No uid/gid remapping is
>> supported, so those could resolve to wrong user or group names.
>>
>> The same applies to the other side: chowning/chmodding in the guest will
>> set specified ownership and permissions on the host.
>>
>> In libvirt domain XML it's modeled using the 'filesystem' element:
>>
>>    <filesystem type='mount'>
>>      <source dir='/path/to/shared/dir'/>
>>      <target dir='sharename'/>
>>    </filesystem>
>>
>> Optional 'readonly' sub-element enables read-only mode.
>>
>> Signed-off-by: Roman Bogorodskiy <bogorodskiy@gmail.com>
>> ---
>>   src/bhyve/bhyve_capabilities.c                | 14 ++++
>>   src/bhyve/bhyve_capabilities.h                |  1 +
>>   src/bhyve/bhyve_command.c                     | 72 +++++++++++++++++++
>>   src/bhyve/bhyve_device.c                      | 10 +++
>>   src/libvirt_private.syms                      |  1 +
>>   .../bhyvexml2argv-fs-9p-readonly.args         | 10 +++
>>   .../bhyvexml2argv-fs-9p-readonly.ldargs       |  3 +
>>   .../bhyvexml2argv-fs-9p-readonly.xml          | 28 ++++++++
>>   ...exml2argv-fs-9p-unsupported-accessmode.xml | 27 +++++++
>>   ...bhyvexml2argv-fs-9p-unsupported-driver.xml | 28 ++++++++
>>   .../bhyvexml2argv-fs-9p.args                  | 10 +++
>>   .../bhyvexml2argv-fs-9p.ldargs                |  3 +
>>   .../bhyvexml2argvdata/bhyvexml2argv-fs-9p.xml | 27 +++++++
>>   tests/bhyvexml2argvtest.c                     |  9 ++-
>>   .../bhyvexml2xmlout-fs-9p.xml                 | 38 ++++++++++
>>   tests/bhyvexml2xmltest.c                      |  1 +
>>   16 files changed, 281 insertions(+), 1 deletion(-)
>>   create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.args
>>   create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.ldargs
>>   create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.xml
>>   create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-unsupported-accessmode.xml
>>   create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-unsupported-driver.xml
>>   create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p.args
>>   create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p.ldargs
>>   create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p.xml
>>   create mode 100644 tests/bhyvexml2xmloutdata/bhyvexml2xmlout-fs-9p.xml
> 
> This is missing
> tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-unsupported-type.xml
> 
> It doesn't seem to be important enough to justify sending v2 just
> because of it, so it's here:
> 
> https://gitlab.com/rbogorodskiy/libvirt/-/blob/bhyve-9p/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-unsupported-type.xml

Yep, with this squashed in:

Reviewed-by: Michal Privoznik <mprivozn@redhat.com>

Michal
Re: [PATCH] bhyve: implement virtio-9p support
Posted by Daniel P. Berrangé 3 years, 6 months ago 
On Thu, Oct 08, 2020 at 05:06:16PM +0400, Roman Bogorodskiy wrote:
> Recently virtio-9p support was added to bhyve.
> 
> On the host side it looks this way:
> 
>   bhyve .... -s 25:0,virtio-9p,sharename=/path/to/shared/dir
> 
> It could also have ",ro" suffix to make share read-only.
> 
> In the Linux guest, this share is mounted with:
> 
>   mount -t 9p sharename /mnt/sharename
> 
> In the guest user will see the same permissions and ownership
> information for this directory as on the host. No uid/gid remapping is
> supported, so those could resolve to wrong user or group names.
> 
> The same applies to the other side: chowning/chmodding in the guest will
> set specified ownership and permissions on the host.
> 
> In libvirt domain XML it's modeled using the 'filesystem' element:
> 
>   <filesystem type='mount'>
>     <source dir='/path/to/shared/dir'/>
>     <target dir='sharename'/>
>   </filesystem>


> diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.xml b/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.xml
> new file mode 100644
> index 0000000000..6341236654
> --- /dev/null
> +++ b/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.xml
> @@ -0,0 +1,28 @@
> +<domain type='bhyve'>
> +  <name>bhyve</name>
> +  <uuid>df3be7e7-a104-11e3-aeb0-50e5492bd3dc</uuid>
> +  <memory>219136</memory>
> +  <vcpu>1</vcpu>
> +  <os>
> +    <type>hvm</type>
> +  </os>
> +  <devices>
> +    <disk type='file'>
> +      <driver name='file' type='raw'/>
> +      <source file='/tmp/freebsd.img'/>
> +      <target dev='hda' bus='sata'/>
> +      <address type='drive' controller='0' bus='0' target='2' unit='0'/>
> +    </disk>
> +    <interface type='bridge'>
> +      <mac address='52:54:00:b9:94:02'/>
> +      <model type='virtio'/>
> +      <source bridge="virbr0"/>
> +      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
> +    </interface>
> +    <filesystem>

This is missing the  type="mount"  attribute which should be mandatory.
It suggests we're not validating the type in the driver, before accessing
the <source> element, which is dangerous.

> +      <source dir='/shared/dir'/>
> +      <target dir='shared_dir'/>
> +      <readonly/>
> +    </filesystem>
> +  </devices>
> +</domain>

The other demo XML files are the same.

Regards,
Daniel
-- 
|: https://berrange.com      -o-    https://www.flickr.com/photos/dberrange :|
|: https://libvirt.org         -o-            https://fstop138.berrange.com :|
|: https://entangle-photo.org    -o-    https://www.instagram.com/dberrange :|
Re: [PATCH] bhyve: implement virtio-9p support
Posted by Roman Bogorodskiy 3 years, 6 months ago 
  Daniel P. Berrangé wrote:

> On Thu, Oct 08, 2020 at 05:06:16PM +0400, Roman Bogorodskiy wrote:
> > Recently virtio-9p support was added to bhyve.
> > 
> > On the host side it looks this way:
> > 
> >   bhyve .... -s 25:0,virtio-9p,sharename=/path/to/shared/dir
> > 
> > It could also have ",ro" suffix to make share read-only.
> > 
> > In the Linux guest, this share is mounted with:
> > 
> >   mount -t 9p sharename /mnt/sharename
> > 
> > In the guest user will see the same permissions and ownership
> > information for this directory as on the host. No uid/gid remapping is
> > supported, so those could resolve to wrong user or group names.
> > 
> > The same applies to the other side: chowning/chmodding in the guest will
> > set specified ownership and permissions on the host.
> > 
> > In libvirt domain XML it's modeled using the 'filesystem' element:
> > 
> >   <filesystem type='mount'>
> >     <source dir='/path/to/shared/dir'/>
> >     <target dir='sharename'/>
> >   </filesystem>
> 
> 
> > diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.xml b/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.xml
> > new file mode 100644
> > index 0000000000..6341236654
> > --- /dev/null
> > +++ b/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.xml
> > @@ -0,0 +1,28 @@
> > +<domain type='bhyve'>
> > +  <name>bhyve</name>
> > +  <uuid>df3be7e7-a104-11e3-aeb0-50e5492bd3dc</uuid>
> > +  <memory>219136</memory>
> > +  <vcpu>1</vcpu>
> > +  <os>
> > +    <type>hvm</type>
> > +  </os>
> > +  <devices>
> > +    <disk type='file'>
> > +      <driver name='file' type='raw'/>
> > +      <source file='/tmp/freebsd.img'/>
> > +      <target dev='hda' bus='sata'/>
> > +      <address type='drive' controller='0' bus='0' target='2' unit='0'/>
> > +    </disk>
> > +    <interface type='bridge'>
> > +      <mac address='52:54:00:b9:94:02'/>
> > +      <model type='virtio'/>
> > +      <source bridge="virbr0"/>
> > +      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
> > +    </interface>
> > +    <filesystem>
> 
> This is missing the  type="mount"  attribute which should be mandatory.
> It suggests we're not validating the type in the driver, before accessing
> the <source> element, which is dangerous.
> 
> > +      <source dir='/shared/dir'/>
> > +      <target dir='shared_dir'/>
> > +      <readonly/>
> > +    </filesystem>
> > +  </devices>
> > +</domain>
> 
> The other demo XML files are the same.

Hm, as I can see in the schema, type="mount" is default. That's what I
see in virDomainFSDefParseXML() @ src/conf/domain_conf.c as well.

I also check that in the driver, and there's a test for it:

tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-unsupported-type.xml

Are you referring to something different?

> Regards,
> Daniel
> -- 
> |: https://berrange.com      -o-    https://www.flickr.com/photos/dberrange :|
> |: https://libvirt.org         -o-            https://fstop138.berrange.com :|
> |: https://entangle-photo.org    -o-    https://www.instagram.com/dberrange :|
> 

Roman Bogorodskiy
Re: [PATCH] bhyve: implement virtio-9p support
Posted by Daniel P. Berrangé 3 years, 6 months ago 
On Tue, Oct 13, 2020 at 05:40:28PM +0400, Roman Bogorodskiy wrote:
>   Daniel P. Berrangé wrote:
> 
> > On Thu, Oct 08, 2020 at 05:06:16PM +0400, Roman Bogorodskiy wrote:
> > > Recently virtio-9p support was added to bhyve.
> > > 
> > > On the host side it looks this way:
> > > 
> > >   bhyve .... -s 25:0,virtio-9p,sharename=/path/to/shared/dir
> > > 
> > > It could also have ",ro" suffix to make share read-only.
> > > 
> > > In the Linux guest, this share is mounted with:
> > > 
> > >   mount -t 9p sharename /mnt/sharename
> > > 
> > > In the guest user will see the same permissions and ownership
> > > information for this directory as on the host. No uid/gid remapping is
> > > supported, so those could resolve to wrong user or group names.
> > > 
> > > The same applies to the other side: chowning/chmodding in the guest will
> > > set specified ownership and permissions on the host.
> > > 
> > > In libvirt domain XML it's modeled using the 'filesystem' element:
> > > 
> > >   <filesystem type='mount'>
> > >     <source dir='/path/to/shared/dir'/>
> > >     <target dir='sharename'/>
> > >   </filesystem>
> > 
> > 
> > > diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.xml b/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.xml
> > > new file mode 100644
> > > index 0000000000..6341236654
> > > --- /dev/null
> > > +++ b/tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.xml
> > > @@ -0,0 +1,28 @@
> > > +<domain type='bhyve'>
> > > +  <name>bhyve</name>
> > > +  <uuid>df3be7e7-a104-11e3-aeb0-50e5492bd3dc</uuid>
> > > +  <memory>219136</memory>
> > > +  <vcpu>1</vcpu>
> > > +  <os>
> > > +    <type>hvm</type>
> > > +  </os>
> > > +  <devices>
> > > +    <disk type='file'>
> > > +      <driver name='file' type='raw'/>
> > > +      <source file='/tmp/freebsd.img'/>
> > > +      <target dev='hda' bus='sata'/>
> > > +      <address type='drive' controller='0' bus='0' target='2' unit='0'/>
> > > +    </disk>
> > > +    <interface type='bridge'>
> > > +      <mac address='52:54:00:b9:94:02'/>
> > > +      <model type='virtio'/>
> > > +      <source bridge="virbr0"/>
> > > +      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
> > > +    </interface>
> > > +    <filesystem>
> > 
> > This is missing the  type="mount"  attribute which should be mandatory.
> > It suggests we're not validating the type in the driver, before accessing
> > the <source> element, which is dangerous.
> > 
> > > +      <source dir='/shared/dir'/>
> > > +      <target dir='shared_dir'/>
> > > +      <readonly/>
> > > +    </filesystem>
> > > +  </devices>
> > > +</domain>
> > 
> > The other demo XML files are the same.
> 
> Hm, as I can see in the schema, type="mount" is default. That's what I
> see in virDomainFSDefParseXML() @ src/conf/domain_conf.c as well.
> 
> I also check that in the driver, and there's a test for it:
> 
> tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-unsupported-type.xml
> 
> Are you referring to something different?

No, you are in fact correct. I was mis-remembering about the default
value, and the bug I hit is actually in the GO XML bindings not handling
the default correctly.


Regards,
Daniel
-- 
|: https://berrange.com      -o-    https://www.flickr.com/photos/dberrange :|
|: https://libvirt.org         -o-            https://fstop138.berrange.com :|
|: https://entangle-photo.org    -o-    https://www.instagram.com/dberrange :|

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