On Wed, Oct 29, 2014 at 08:33:32PM +0800, Chen Fan wrote:
For memnode in numatune element, the range of attribute 'nodeset' was not validated. on my host maxnodes was 1, but when setting nodeset to '0-2' or more, guest also started succuss. there probably was qemu's bug too.
How about rewording this as: There was no check for 'nodeset' attribute in numatune-related elements. This patch adds validation that any nodeset specified does not exceed maximum host node.
Signed-off-by: Chen Fan <chen.fan.f...@cn.fujitsu.com>
---
src/conf/numatune_conf.c | 28 +++++++++++++
src/conf/numatune_conf.h | 1 +
src/libvirt_private.syms | 2 +
src/qemu/qemu_command.c | 3 ++
src/qemu/qemu_command.h | 1 +
src/util/virbitmap.c | 49 ++++++++++++++++++++++
src/util/virbitmap.h | 3 ++
src/util/virnuma.c | 33 +++++++++++++++
src/util/virnuma.h | 2 +
...rgv-numatune-static-nodeset-exceed-hostnode.xml | 35 ++++++++++++++++
tests/qemuxml2argvmock.c | 9 ++++
tests/qemuxml2argvtest.c | 1 +
tests/virbitmaptest.c | 26 +++++++++++-
13 files changed, 192 insertions(+), 1 deletion(-)
create mode 100644
tests/qemuxml2argvdata/qemuxml2argv-numatune-static-nodeset-exceed-hostnode.xml
diff --git a/src/conf/numatune_conf.c b/src/conf/numatune_conf.c
index 21d9a64..54f309a 100644
--- a/src/conf/numatune_conf.c
+++ b/src/conf/numatune_conf.c
@@ -612,3 +612,31 @@ virDomainNumatuneHasPerNodeBinding(virDomainNumatunePtr
numatune)
return false;
}
+
+int
+virDomainNumatuneSpecifiedMaxNode(virDomainNumatunePtr numatune)
+{
+ int ret = -1;
+ virBitmapPtr nodemask = NULL;
+ size_t i;
+
+ if (!numatune)
+ return ret;
+
+ nodemask = virDomainNumatuneGetNodeset(numatune, NULL, -1);
+ if (nodemask) {
+ ret = virBitmapLastSetBit(nodemask, -1);
+ }
+ for (i = 0; i < numatune->nmem_nodes; i++) {
Well, you're using the advantage of accessible structure members here (numatune->nmem_nodes), but using accessors around. These particular ones are useless here when you don't need any of the logic they provide.
+ int bit = -1;
+ nodemask = virDomainNumatuneGetNodeset(numatune, NULL, i);
+ if (!nodemask)
+ continue;
+
+ bit = virBitmapLastSetBit(nodemask, -1);
+ if (bit > ret)
+ ret = bit;
+ }
+
+ return ret;
+}
diff --git a/src/conf/numatune_conf.h b/src/conf/numatune_conf.h
index 5254629..15dc0d6 100644
--- a/src/conf/numatune_conf.h
+++ b/src/conf/numatune_conf.h
@@ -102,4 +102,5 @@ bool virDomainNumatuneHasPlacementAuto(virDomainNumatunePtr
numatune);
bool virDomainNumatuneHasPerNodeBinding(virDomainNumatunePtr numatune);
+int virDomainNumatuneSpecifiedMaxNode(virDomainNumatunePtr numatune);
#endif /* __NUMATUNE_CONF_H__ */
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index d63a8f0..4a30ad7 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -1011,6 +1011,7 @@ virBitmapFree;
virBitmapGetBit;
virBitmapIsAllClear;
virBitmapIsAllSet;
+virBitmapLastSetBit;
virBitmapNew;
virBitmapNewCopy;
virBitmapNewData;
@@ -1728,6 +1729,7 @@ virNumaGetPageInfo;
virNumaGetPages;
virNumaIsAvailable;
virNumaNodeIsAvailable;
+virNumaNodesetIsAvailable;
virNumaSetPagePoolSize;
virNumaSetupMemoryPolicy;
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 2e5af4f..9757d3e 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -6663,6 +6663,9 @@ qemuBuildNumaArgStr(virQEMUDriverConfigPtr cfg,
goto cleanup;
}
+ if (!virNumaNodesetIsAvailable(def->numatune))
+ goto cleanup;
+
for (i = 0; i < def->mem.nhugepages; i++) {
ssize_t next_bit, pos = 0;
diff --git a/src/qemu/qemu_command.h b/src/qemu/qemu_command.h
index aa40c9e..f263665 100644
--- a/src/qemu/qemu_command.h
+++ b/src/qemu/qemu_command.h
@@ -27,6 +27,7 @@
# include "domain_addr.h"
# include "domain_conf.h"
# include "vircommand.h"
+# include "virnuma.h"
# include "capabilities.h"
# include "qemu_conf.h"
# include "qemu_domain.h"
diff --git a/src/util/virbitmap.c b/src/util/virbitmap.c
index b6bd074..aed525a 100644
--- a/src/util/virbitmap.c
+++ b/src/util/virbitmap.c
@@ -651,6 +651,55 @@ virBitmapNextSetBit(virBitmapPtr bitmap, ssize_t pos)
}
/**
+ * virBitmapLastSetBit:
+ * @bitmap: the bitmap
+ * @pos: the position after which to search for a set bit
+ *
+ * Search for the last set bit before position @pos in bitmap @bitmap.
+ * @pos can be -1 to search for the last set bit. Position starts
+ * at max_bit.
+ *
+ * Returns the position of the found bit, or -1 if no bit found.
+ */
+ssize_t
+virBitmapLastSetBit(virBitmapPtr bitmap, ssize_t pos)
+{
+ size_t nl;
+ size_t nb;
+ unsigned long bits;
+ size_t i;
+
+ if (pos < 0)
+ pos = bitmap->max_bit;
+
+ pos--;
+
+ if (pos >= bitmap->max_bit)
+ return -1;
+
+ nl = pos / VIR_BITMAP_BITS_PER_UNIT;
+ nb = pos % VIR_BITMAP_BITS_PER_UNIT;
+
You can use VIR_BITMAP_UNIT_OFFSET and VIR_BITMAP_BIT_OFFSET macros here.
+ bits = bitmap->map[nl] & ((1UL << (nb + 1)) - 1); +
VIR_BITMAP_BIT(nb + 1) - 1
+ while (bits == 0 && --nl < bitmap->map_len) {
+ bits = bitmap->map[nl];
+ }
+
Reading this is weird, especially when you're using underflowing of size_t, eww. I think you made this unnecessarily complicated by keeping "pos" attribute there. If (and only if) you really need to have @pos there, I rather suggest making this a wrapper using virBitmapNextSetBit(), but I hope you don't.
+ if (bits == 0)
+ return -1;
+
+ i = VIR_BITMAP_BITS_PER_UNIT - 1;
+ for (; i < VIR_BITMAP_BITS_PER_UNIT; i--) {
+ if (bits & 1UL << i) {
+ return i + nl * VIR_BITMAP_BITS_PER_UNIT;
+ }
+ }
+
+ return -1;
+}
+
+/**
* virBitmapNextClearBit:
* @bitmap: the bitmap
* @pos: the position after which to search for a clear bit
diff --git a/src/util/virbitmap.h b/src/util/virbitmap.h
index 4493cc9..c0fad55 100644
--- a/src/util/virbitmap.h
+++ b/src/util/virbitmap.h
@@ -105,6 +105,9 @@ bool virBitmapIsAllClear(virBitmapPtr bitmap)
ssize_t virBitmapNextSetBit(virBitmapPtr bitmap, ssize_t pos)
ATTRIBUTE_NONNULL(1);
+ssize_t virBitmapLastSetBit(virBitmapPtr bitmap, ssize_t pos)
+ ATTRIBUTE_NONNULL(1);
+
ssize_t virBitmapNextClearBit(virBitmapPtr bitmap, ssize_t pos)
ATTRIBUTE_NONNULL(1);
Could you separate these virbitmap.* hunks and the tests for them into their own patch, please?
diff --git a/src/util/virnuma.c b/src/util/virnuma.c
index 690615f..fbe8fd1 100644
--- a/src/util/virnuma.c
+++ b/src/util/virnuma.c
@@ -312,6 +312,33 @@ virNumaGetNodeCPUs(int node,
return ret;
}
+
+bool
+virNumaNodesetIsAvailable(virDomainNumatunePtr numatune)
+{
+ int maxnode;
+ int bit;
+
+ if (!numatune)
+ return true;
+
+ if ((maxnode = virNumaGetMaxNode()) < 0)
+ return false;
+
+ maxnode = maxnode < NUMA_NUM_NODES ? maxnode : NUMA_NUM_NODES;
+
+ bit = virDomainNumatuneSpecifiedMaxNode(numatune);
+ if (bit > maxnode)
+ goto error;
+
+ return true;
+
+ error:
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("NUMA node %d is out of range"), bit);
+ return false;
+}
+
# undef MASK_CPU_ISSET
# undef n_bits
@@ -373,6 +400,12 @@ virNumaGetNodeCPUs(int node ATTRIBUTE_UNUSED,
_("NUMA isn't available on this host"));
return -1;
}
+
+bool
+virNumaNodesetIsAvailable(virDomainNumatunePtr numatune)
+{
+ return true;
+}
#endif
In what case would you like this to return true?
diff --git a/src/util/virnuma.h b/src/util/virnuma.h
index 04b6b8c..e129bb2 100644
--- a/src/util/virnuma.h
+++ b/src/util/virnuma.h
@@ -34,6 +34,8 @@ char *virNumaGetAutoPlacementAdvice(unsigned short vcups,
int virNumaSetupMemoryPolicy(virDomainNumatunePtr numatune,
virBitmapPtr nodemask);
+bool virNumaNodesetIsAvailable(virDomainNumatunePtr numatune);
+
bool virNumaIsAvailable(void);
int virNumaGetMaxNode(void);
bool virNumaNodeIsAvailable(int node);
diff --git
a/tests/qemuxml2argvdata/qemuxml2argv-numatune-static-nodeset-exceed-hostnode.xml
b/tests/qemuxml2argvdata/qemuxml2argv-numatune-static-nodeset-exceed-hostnode.xml
new file mode 100644
index 0000000..84a560a
--- /dev/null
+++
b/tests/qemuxml2argvdata/qemuxml2argv-numatune-static-nodeset-exceed-hostnode.xml
@@ -0,0 +1,35 @@
+<domain type='qemu'>
+ <name>QEMUGuest1</name>
+ <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+ <memory unit='KiB'>1048576</memory>
+ <currentMemory unit='KiB'>1048576</currentMemory>
+ <vcpu placement='static'>4</vcpu>
+ <numatune>
+ <memnode cellid='0' mode='strict' nodeset='0-8'/>
+ <memnode cellid='1' mode='strict' nodeset='0'/>
+ </numatune>
+ <os>
+ <type arch='i686' machine='pc'>hvm</type>
+ <boot dev='hd'/>
+ </os>
+ <cpu>
+ <numa>
+ <cell id='0' cpus='0-1' memory='524288'/>
+ <cell id='1' cpus='2-3' memory='524288'/>
+ </numa>
+ </cpu>
+ <clock offset='utc'/>
+ <on_poweroff>destroy</on_poweroff>
+ <on_reboot>restart</on_reboot>
+ <on_crash>destroy</on_crash>
+ <devices>
+ <emulator>/usr/bin/qemu-system-x86_64</emulator>
+ <disk type='block' device='disk'>
+ <source dev='/dev/HostVG/QEMUGuest1'/>
+ <target dev='hda' bus='ide'/>
+ <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+ </disk>
+ <controller type='ide' index='0'/>
+ <memballoon model='virtio'/>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2argvmock.c b/tests/qemuxml2argvmock.c
index bff3b0f..316bf0b 100644
--- a/tests/qemuxml2argvmock.c
+++ b/tests/qemuxml2argvmock.c
@@ -21,6 +21,7 @@
#include <config.h>
#include "internal.h"
+#include "virnuma.h"
#include <time.h>
time_t time(time_t *t)
@@ -30,3 +31,11 @@ time_t time(time_t *t)
*t = ret;
return ret;
}
+
+int
+virNumaGetMaxNode(void)
+{
+ const int maxnodes = 7;
+
+ return maxnodes;
+}
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index 0e9fab9..bab6d0d 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -1250,6 +1250,7 @@ mymain(void)
DO_TEST_FAILURE("numatune-memnode-no-memory", NONE);
DO_TEST("numatune-auto-nodeset-invalid", NONE);
+ DO_TEST_FAILURE("numatune-static-nodeset-exceed-hostnode",
QEMU_CAPS_OBJECT_MEMORY_RAM);
DO_TEST_PARSE_ERROR("numatune-memnode-nocpu", NONE);
DO_TEST_PARSE_ERROR("numatune-memnodes-problematic", NONE);
DO_TEST("numad", NONE);
diff --git a/tests/virbitmaptest.c b/tests/virbitmaptest.c
index ea832ad..21e8611 100644
--- a/tests/virbitmaptest.c
+++ b/tests/virbitmaptest.c
@@ -171,7 +171,7 @@ test3(const void *data ATTRIBUTE_UNUSED)
return ret;
}
-/* test for virBitmapNextSetBit, virBitmapNextClearBit */
+/* test for virBitmapNextSetBit, virBitmapLastSetBit, virBitmapNextClearBit */
static int
test4(const void *data ATTRIBUTE_UNUSED)
{
@@ -200,6 +200,9 @@ test4(const void *data ATTRIBUTE_UNUSED)
if (virBitmapNextSetBit(bitmap, -1) != -1)
goto error;
+ if (virBitmapLastSetBit(bitmap, -1) != -1)
+ goto error;
+
for (i = 0; i < size; i++) {
if (virBitmapNextClearBit(bitmap, i - 1) != i)
goto error;
@@ -232,6 +235,18 @@ test4(const void *data ATTRIBUTE_UNUSED)
if (virBitmapNextSetBit(bitmap, i) != -1)
goto error;
+ j = sizeof(bitsPos)/sizeof(int) - 1;
+ i = -1;
+
+ while (j < ARRAY_CARDINALITY(bitsPos)) {
+ i = virBitmapLastSetBit(bitmap, i);
+ if (i != bitsPos[j--])
+ goto error;
+ }
+
+ if (virBitmapLastSetBit(bitmap, i) != -1)
+ goto error;
+
j = 0;
i = -1;
@@ -255,6 +270,15 @@ test4(const void *data ATTRIBUTE_UNUSED)
if (virBitmapNextSetBit(bitmap, i) != -1)
goto error;
+ for (i = size; i > 0; i--) {
+ if (virBitmapLastSetBit(bitmap, i) != i - 1)
+ goto error;
+ }
+
+ if (virBitmapLastSetBit(bitmap, i) != -1)
+ goto error;
+
+
if (virBitmapNextClearBit(bitmap, -1) != -1)
goto error;
--
1.9.3
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