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bh=CEmc8hWH0N3MbdgZGlp8+ITWi7wqdjs4A+FtzR//oQE=; b=A8tl+7aNuD5cNX/om+22VFXL7xdIF/fSoFCNqny5jES9cc9MBNt9DiWW2zoWf9X1+9 CSSdUhbRJD8kSD9HvGcbnUvd+LgvDuNShhmRfcPgAeNAaw7cfb+r097YAuUvf68QnAPw NIdoIRa8IxF5/h3E4DJgvqxNQcCqycQPPRt62dck6Tzw8cH8LV8TjGpqCR1O1cH2JrJ5 0epWi0g+AIRk6+D2eeBbBEjRQGQ3tMkHACa0eGgo5ZBzofcMOf76KHDpNwaIhYYUPEPc rgprWolbtqfaHjAmWfxdJ5DB8M3Ey9l4Q0eAlWmhFBit/Zp26i+g2ldTX4UqrtjU+Km2 Innw== X-Gm-Message-State: AOJu0YyyVU/Ya1KG/7ciJJSc59iyGGsrhf0Eh/B9xio2praheRKYmgz2 n667QbFsZEzyStauKMdkoms= X-Google-Smtp-Source: AGHT+IEwddlt4vXhbOyCpmM4UXHfG9e1JA0DMDHbJj9WBsJkc/HEvrmM3MsvsjowOLJqRO+ElDAmng== X-Received: by 2002:a05:6a20:6aa6:b0:18f:f310:5bad with SMTP id bi38-20020a056a206aa600b0018ff3105badmr865418pzb.32.1703253101755; Fri, 22 Dec 2023 05:51:41 -0800 (PST) Received: from wheely.local0.net ([203.220.145.68]) by smtp.gmail.com with ESMTPSA id n12-20020a17090ac68c00b0028ae54d988esm3629280pjt.48.2023.12.22.05.51.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 Dec 2023 05:51:41 -0800 (PST) From: Nicholas Piggin To: Thomas Huth Subject: [kvm-unit-tests PATCH 5/9] migration: Support multiple migrations Date: Fri, 22 Dec 2023 23:50:44 +1000 Message-ID: <20231222135048.1924672-6-npiggin@gmail.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231222135048.1924672-1-npiggin@gmail.com> References: <20231222135048.1924672-1-npiggin@gmail.com> MIME-Version: 1.0 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Laurent Vivier , linux-s390@vger.kernel.org, Nico Boehr , Janosch Frank , kvm@vger.kernel.org, David Hildenbrand , linuxppc-dev@lists.ozlabs.org, Shaoqin Huang , Nicholas Piggin , Andrew Jones , Eric Auger , kvmarm@lists.linux.dev, Paolo Bonzini , Claudio Imbrenda , Alexandru Elisei Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Support multiple migrations by flipping dest file/socket variables to source after the migration is complete, ready to start again. A new destination is created if the test outputs the migrate line again. Test cases may now switch to calling migrate() one or more times. Signed-off-by: Nicholas Piggin --- lib/migrate.c | 8 ++-- lib/migrate.h | 1 + scripts/arch-run.bash | 93 +++++++++++++++++++++++++++++++++++++------ 3 files changed, 85 insertions(+), 17 deletions(-) diff --git a/lib/migrate.c b/lib/migrate.c index 527e63ae..b7721659 100644 --- a/lib/migrate.c +++ b/lib/migrate.c @@ -8,8 +8,10 @@ #include #include "migrate.h" -/* static for now since we only support migrating exactly once per test. */ -static void migrate(void) +/* + * Initiate migration and wait for it to complete. + */ +void migrate(void) { puts("Now migrate the VM, then press a key to continue...\n"); (void)getchar(); @@ -19,8 +21,6 @@ static void migrate(void) /* * Initiate migration and wait for it to complete. * If this function is called more than once, it is a no-op. - * Since migrate_cmd can only migrate exactly once this function can - * simplify the control flow, especially when skipping tests. */ void migrate_once(void) { diff --git a/lib/migrate.h b/lib/migrate.h index 3c94e6af..2af06a72 100644 --- a/lib/migrate.h +++ b/lib/migrate.h @@ -6,4 +6,5 @@ * Author: Nico Boehr */ +void migrate(void); void migrate_once(void); diff --git a/scripts/arch-run.bash b/scripts/arch-run.bash index 8fbfc50c..1ea0f8bc 100644 --- a/scripts/arch-run.bash +++ b/scripts/arch-run.bash @@ -132,29 +132,76 @@ run_migration () migsock=$(mktemp -u -t mig-helper-socket.XXXXXXXXXX) migout1=$(mktemp -t mig-helper-stdout1.XXXXXXXXXX) migout_fifo1=$(mktemp -u -t mig-helper-fifo-stdout1.XXXXXXXXXX) + migout2=$(mktemp -t mig-helper-stdout2.XXXXXXXXXX) + migout_fifo2=$(mktemp -u -t mig-helper-fifo-stdout2.XXXXXXXXXX) qmp1=$(mktemp -u -t mig-helper-qmp1.XXXXXXXXXX) qmp2=$(mktemp -u -t mig-helper-qmp2.XXXXXXXXXX) fifo=$(mktemp -u -t mig-helper-fifo.XXXXXXXXXX) # race here between file creation and trap trap "trap - TERM ; kill 0 ; exit 2" INT TERM - trap "rm -f ${migout1} ${migsock} ${qmp1} ${qmp2} ${fifo}" RETURN EXIT + trap "rm -f ${migout1} ${migout2} ${migout_fifo1} ${migout_fifo2} ${migsock} ${qmp1} ${qmp2} ${fifo}" RETURN EXIT qmpout1=/dev/null qmpout2=/dev/null + migcmdline=$@ - eval "$@" -chardev socket,id=mon1,path=${qmp1},server=on,wait=off \ + mkfifo ${migout_fifo1} + mkfifo ${migout_fifo2} + + eval "$migcmdline" \ + -chardev socket,id=mon1,path=${qmp1},server=on,wait=off \ -mon chardev=mon1,mode=control > ${migout_fifo1} & live_pid=$! cat ${migout_fifo1} | tee ${migout1} & - # We have to use cat to open the named FIFO, because named FIFO's, unlike - # pipes, will block on open() until the other end is also opened, and that - # totally breaks QEMU... + # The test must prompt the user to migrate, so wait for the "migrate" + # keyword + while ! grep -q -i "Now migrate the VM" < ${migout1} ; do + if ! ps -p ${live_pid} > /dev/null ; then + echo "ERROR: Test exit before migration point." >&2 + qmp ${qmp1} '"quit"'> ${qmpout1} 2>/dev/null + return 3 + fi + sleep 0.1 + done + + # This starts the first source QEMU in advance of the test reaching the + # migration point, since we expect at least one migration. Subsequent + # sources are started as the test hits migrate keywords. + do_migration || return $? + + while ps -p ${live_pid} > /dev/null ; do + # Wait for EXIT or further migrations + if ! grep -q -i "Now migrate the VM" < ${migout1} ; then + sleep 0.1 + else + do_migration || return $? + fi + done + + wait ${live_pid} + ret=$? + + while (( $(jobs -r | wc -l) > 0 )); do + sleep 0.1 + done + + return $ret +} + +do_migration () +{ + # We have to use cat to open the named FIFO, because named FIFO's, + # unlike pipes, will block on open() until the other end is also + # opened, and that totally breaks QEMU... mkfifo ${fifo} - eval "$@" -chardev socket,id=mon2,path=${qmp2},server=on,wait=off \ - -mon chardev=mon2,mode=control -incoming unix:${migsock} < <(cat ${fifo}) & + eval "$migcmdline" \ + -chardev socket,id=mon2,path=${qmp2},server=on,wait=off \ + -mon chardev=mon2,mode=control -incoming unix:${migsock} \ + < <(cat ${fifo}) > ${migout_fifo2} & incoming_pid=$! + cat ${migout_fifo2} | tee ${migout2} & # The test must prompt the user to migrate, so wait for the "migrate" keyword while ! grep -q -i "Now migrate the VM" < ${migout1} ; do @@ -165,7 +212,7 @@ run_migration () qmp ${qmp2} '"quit"'> ${qmpout2} 2>/dev/null return 3 fi - sleep 1 + sleep 0.1 done # Wait until the destination has created the incoming and qmp sockets @@ -177,7 +224,7 @@ run_migration () # Wait for the migration to complete migstatus=`qmp ${qmp1} '"query-migrate"' | grep return` while ! grep -q '"completed"' <<<"$migstatus" ; do - sleep 1 + sleep 0.1 if ! migstatus=`qmp ${qmp1} '"query-migrate"'`; then echo "ERROR: Querying migration state failed." >&2 echo > ${fifo} @@ -193,14 +240,34 @@ run_migration () return 2 fi done + qmp ${qmp1} '"quit"'> ${qmpout1} 2>/dev/null + + # keypress to dst so getchar completes and test continues echo > ${fifo} - wait $incoming_pid + rm ${fifo} + + # Ensure the incoming socket is removed, ready for next destination + if [ -S ${migsock} ] ; then + echo "ERROR: Incoming migration socket not removed after migration." >& 2 + qmp ${qmp2} '"quit"'> ${qmpout2} 2>/dev/null + return 2 + fi + + wait ${live_pid} ret=$? - while (( $(jobs -r | wc -l) > 0 )); do - sleep 0.5 - done + # Now flip the variables because dest becomes source + live_pid=${incoming_pid} + tmp=${migout1} + migout1=${migout2} + migout2=${tmp} + tmp=${migout_fifo1} + migout_fifo1=${migout_fifo2} + migout_fifo2=${tmp} + tmp=${qmp1} + qmp1=${qmp2} + qmp2=${tmp} return $ret }