Add an element to configure the rlimit nofile size: ... <binary> <rlimit_nofile size='122333'/> </binary> ... Non-positive values are forbidden in 'domaincommon.rng'. Added separate test file, created by modifying the 'vhost-user-fs-fd-memory.xml'. Resolves: https://gitlab.com/libvirt/libvirt/-/issues/485 Signed-off-by: Adam Julis <ajulis@xxxxxxxxxx> --- docs/formatdomain.rst | 4 ++ src/conf/domain_conf.c | 12 +++++ src/conf/domain_conf.h | 1 + src/conf/schemas/domaincommon.rng | 9 ++++ ...vhost-user-fs-fd-rlimit.x86_64-latest.args | 34 +++++++++++++ .../vhost-user-fs-fd-rlimit.x86_64-latest.xml | 50 +++++++++++++++++++ .../vhost-user-fs-fd-rlimit.xml | 50 +++++++++++++++++++ tests/qemuxmlconftest.c | 1 + 8 files changed, 161 insertions(+) create mode 100644 tests/qemuxmlconfdata/vhost-user-fs-fd-rlimit.x86_64-latest.args create mode 100644 tests/qemuxmlconfdata/vhost-user-fs-fd-rlimit.x86_64-latest.xml create mode 100644 tests/qemuxmlconfdata/vhost-user-fs-fd-rlimit.xml diff --git a/docs/formatdomain.rst b/docs/formatdomain.rst index ca33a2a570..10584dfe83 100644 --- a/docs/formatdomain.rst +++ b/docs/formatdomain.rst @@ -3734,6 +3734,10 @@ A directory on the host that can be accessed directly from the guest. The thread pool helps increase the number of requests in flight when used with storage that has a higher latency. However, it has an overhead, and so for fast, low latency filesystems, it may be best to turn it off. ( :since:`Since 8.5.0` ) + Element ``rlimit_profile`` accepts one attribute ``size`` which defines the + maximum number of file descriptors. Non-positive values are forbidden. + Although numbers greater than 1M are allowed, the virtiofsd documentation + states that in this case its set by virtiofsd to the 1M. ( :since:`Since 10.6.0` ) ``source`` The resource on the host that is being accessed in the guest. The ``name`` attribute must be used with ``type='template'``, and the ``dir`` attribute diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index 32df908d95..6733857a3a 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -8868,6 +8868,7 @@ virDomainFSDefParseXML(virDomainXMLOption *xmlopt, g_autofree char *queue_size = virXPathString("string(./driver/@queue)", ctxt); g_autofree char *binary = virXPathString("string(./binary/@path)", ctxt); g_autofree char *thread_pool_size = virXPathString("string(./binary/thread_pool/@size)", ctxt); + g_autofree char *rlimit_nofile = virXPathString("string(./binary/rlimit_nofile/@size)", ctxt); xmlNodePtr binary_node = virXPathNode("./binary", ctxt); xmlNodePtr binary_lock_node = virXPathNode("./binary/lock", ctxt); xmlNodePtr binary_cache_node = virXPathNode("./binary/cache", ctxt); @@ -8891,6 +8892,14 @@ virDomainFSDefParseXML(virDomainXMLOption *xmlopt, goto error; } + if (rlimit_nofile && + virStrToLong_ull(rlimit_nofile, NULL, 10, &def->rlimit_nofile) < 0) { + virReportError(VIR_ERR_XML_ERROR, + _("cannot parse rlimit_nofile '%1$s' for virtiofs"), + rlimit_nofile); + goto error; + } + if (binary) def->binary = virFileSanitizePath(binary); @@ -23415,6 +23424,9 @@ virDomainFSDefFormat(virBuffer *buf, if (def->thread_pool_size >= 0) virBufferAsprintf(&binaryBuf, "<thread_pool size='%d'/>\n", def->thread_pool_size); + if (def->rlimit_nofile > 0) + virBufferAsprintf(&binaryBuf, "<rlimit_nofile size='%lld'/>\n", def->rlimit_nofile); + } virDomainVirtioOptionsFormat(&driverAttrBuf, def->virtio); diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h index 0fcc4f1f9b..8283493dfc 100644 --- a/src/conf/domain_conf.h +++ b/src/conf/domain_conf.h @@ -890,6 +890,7 @@ struct _virDomainFSDef { bool symlinksResolved; char *binary; unsigned long long queue_size; + unsigned long long rlimit_nofile; virTristateSwitch xattr; virDomainFSCacheMode cache; virTristateSwitch posix_lock; diff --git a/src/conf/schemas/domaincommon.rng b/src/conf/schemas/domaincommon.rng index 2d23fcf123..ab5374d5f0 100644 --- a/src/conf/schemas/domaincommon.rng +++ b/src/conf/schemas/domaincommon.rng @@ -3380,6 +3380,15 @@ </optional> </element> </optional> + <optional> + <element name="rlimit_nofile"> + <optional> + <attribute name="size"> + <data type="positiveInteger"/> + </attribute> + </optional> + </element> + </optional> </interleave> </element> </define> diff --git a/tests/qemuxmlconfdata/vhost-user-fs-fd-rlimit.x86_64-latest.args b/tests/qemuxmlconfdata/vhost-user-fs-fd-rlimit.x86_64-latest.args new file mode 100644 index 0000000000..b4c2e3fe98 --- /dev/null +++ b/tests/qemuxmlconfdata/vhost-user-fs-fd-rlimit.x86_64-latest.args @@ -0,0 +1,34 @@ +LC_ALL=C \ +PATH=/bin \ +HOME=/var/lib/libvirt/qemu/domain--1-guest \ +USER=test \ +LOGNAME=test \ +XDG_DATA_HOME=/var/lib/libvirt/qemu/domain--1-guest/.local/share \ +XDG_CACHE_HOME=/var/lib/libvirt/qemu/domain--1-guest/.cache \ +XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-guest/.config \ +/usr/bin/qemu-system-x86_64 \ +-name guest=guest,debug-threads=on \ +-S \ +-object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/var/lib/libvirt/qemu/domain--1-guest/master-key.aes"}' \ +-machine pc,usb=off,dump-guest-core=off,acpi=off \ +-accel kvm \ +-cpu qemu64 \ +-m size=14680064k \ +-overcommit mem-lock=off \ +-smp 2,sockets=2,cores=1,threads=1 \ +-object '{"qom-type":"memory-backend-file","id":"ram-node0","mem-path":"/var/lib/libvirt/qemu/ram/-1-guest/ram-node0","share":true,"size":15032385536}' \ +-numa node,nodeid=0,cpus=0-1,memdev=ram-node0 \ +-uuid 126f2720-6f8e-45ab-a886-ec9277079a67 \ +-display none \ +-no-user-config \ +-nodefaults \ +-chardev socket,id=charmonitor,fd=1729,server=on,wait=off \ +-mon chardev=charmonitor,id=monitor,mode=control \ +-rtc base=utc \ +-no-shutdown \ +-boot strict=on \ +-chardev socket,id=chr-vu-fs0,path=/var/lib/libvirt/qemu/domain--1-guest/fs0-fs.sock \ +-device '{"driver":"vhost-user-fs-pci","id":"fs0","chardev":"chr-vu-fs0","queue-size":1027,"tag":"mount_tag","bus":"pci.0","addr":"0x2"}' \ +-audiodev '{"id":"audio1","driver":"none"}' \ +-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \ +-msg timestamp=on diff --git a/tests/qemuxmlconfdata/vhost-user-fs-fd-rlimit.x86_64-latest.xml b/tests/qemuxmlconfdata/vhost-user-fs-fd-rlimit.x86_64-latest.xml new file mode 100644 index 0000000000..2983d3f275 --- /dev/null +++ b/tests/qemuxmlconfdata/vhost-user-fs-fd-rlimit.x86_64-latest.xml @@ -0,0 +1,50 @@ +<domain type='kvm'> + <name>guest</name> + <uuid>126f2720-6f8e-45ab-a886-ec9277079a67</uuid> + <memory unit='KiB'>14680064</memory> + <currentMemory unit='KiB'>14680064</currentMemory> + <memoryBacking> + <source type='file'/> + <access mode='shared'/> + </memoryBacking> + <vcpu placement='static'>2</vcpu> + <os> + <type arch='x86_64' machine='pc'>hvm</type> + <boot dev='hd'/> + </os> + <cpu mode='custom' match='exact' check='none'> + <model fallback='forbid'>qemu64</model> + <numa> + <cell id='0' cpus='0-1' memory='14680064' unit='KiB' memAccess='shared'/> + </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> + <controller type='usb' index='0' model='none'/> + <controller type='pci' index='0' model='pci-root'/> + <filesystem type='mount' accessmode='passthrough'> + <driver type='virtiofs' queue='1027'/> + <binary xattr='on'> + <cache mode='always'/> + <sandbox mode='chroot'/> + <thread_pool size='16'/> + <rlimit_nofile size='122333'/> + </binary> + <idmap> + <uid start='0' target='100000' count='65535'/> + <gid start='0' target='100000' count='65535'/> + </idmap> + <source dir='/path'/> + <target dir='mount_tag'/> + <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> + </filesystem> + <input type='mouse' bus='ps2'/> + <input type='keyboard' bus='ps2'/> + <audio id='1' type='none'/> + <memballoon model='none'/> + </devices> +</domain> diff --git a/tests/qemuxmlconfdata/vhost-user-fs-fd-rlimit.xml b/tests/qemuxmlconfdata/vhost-user-fs-fd-rlimit.xml new file mode 100644 index 0000000000..2983d3f275 --- /dev/null +++ b/tests/qemuxmlconfdata/vhost-user-fs-fd-rlimit.xml @@ -0,0 +1,50 @@ +<domain type='kvm'> + <name>guest</name> + <uuid>126f2720-6f8e-45ab-a886-ec9277079a67</uuid> + <memory unit='KiB'>14680064</memory> + <currentMemory unit='KiB'>14680064</currentMemory> + <memoryBacking> + <source type='file'/> + <access mode='shared'/> + </memoryBacking> + <vcpu placement='static'>2</vcpu> + <os> + <type arch='x86_64' machine='pc'>hvm</type> + <boot dev='hd'/> + </os> + <cpu mode='custom' match='exact' check='none'> + <model fallback='forbid'>qemu64</model> + <numa> + <cell id='0' cpus='0-1' memory='14680064' unit='KiB' memAccess='shared'/> + </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> + <controller type='usb' index='0' model='none'/> + <controller type='pci' index='0' model='pci-root'/> + <filesystem type='mount' accessmode='passthrough'> + <driver type='virtiofs' queue='1027'/> + <binary xattr='on'> + <cache mode='always'/> + <sandbox mode='chroot'/> + <thread_pool size='16'/> + <rlimit_nofile size='122333'/> + </binary> + <idmap> + <uid start='0' target='100000' count='65535'/> + <gid start='0' target='100000' count='65535'/> + </idmap> + <source dir='/path'/> + <target dir='mount_tag'/> + <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> + </filesystem> + <input type='mouse' bus='ps2'/> + <input type='keyboard' bus='ps2'/> + <audio id='1' type='none'/> + <memballoon model='none'/> + </devices> +</domain> diff --git a/tests/qemuxmlconftest.c b/tests/qemuxmlconftest.c index 389d31800b..2aaf6103db 100644 --- a/tests/qemuxmlconftest.c +++ b/tests/qemuxmlconftest.c @@ -2814,6 +2814,7 @@ mymain(void) DO_TEST_CAPS_ARCH_LATEST("launch-security-s390-pv", "s390x"); DO_TEST_CAPS_LATEST("vhost-user-fs-fd-memory"); + DO_TEST_CAPS_LATEST("vhost-user-fs-fd-rlimit"); DO_TEST_CAPS_LATEST("vhost-user-fs-hugepages"); DO_TEST_CAPS_LATEST_PARSE_ERROR("vhost-user-fs-readonly"); -- 2.45.2
