[PATCH] qemu: use a fixed directory for saving qmp capabilities process

From: Bihong Yu <yubihong(a)huawei.com&gt; Date: Tue, 14 Jul 2020 11:17:46 +0800 Subject: [PATCH] qemu: use a fixed directory for saving qmp capabilities process In some case, the qmp capabilities process possible residues. So we need to cleanup the residual process during start libvirt. For this reason, we should use a fixed directory for saving qmp capabilities process. Change-Id: I6a74a046e192eee169a0e2677ce3aed9ded5e0ed Signed-off-by:Bihong Yu <yubihong(a)huawei.com&gt; --- src/qemu/qemu_process.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c index 70fc24b..eba14ed 100644 --- a/src/qemu/qemu_process.c +++ b/src/qemu/qemu_process.c @@ -8450,21 +8450,24 @@ static int qemuProcessQMPInit(qemuProcessQMPPtr proc) { g_autofree char *template = NULL; + virErrorPtr orig_err; VIR_DEBUG("proc=%p, emulator=%s", proc, proc->binary); - template = g_strdup_printf("%s/qmp-XXXXXX", proc->libDir); + template = g_strdup_printf("%s/qmp-capabilities", proc->libDir); - if (!(proc->uniqDir = g_mkdtemp(template))) { + if (g_mkdir_with_parents(template, 0700) < 0) { virReportSystemError(errno, _("Failed to create unique directory with " "template '%s' for probing QEMU"), template); return -1; } - /* if g_mkdtemp succeeds, proc->uniqDir is now the owner of - * the string. Set template to NULL to avoid freeing - * the memory in this case */ + /* + * if g_mkdir_with_parents succeeds, assign the template to proc->uniqDir. + * Then set template to NULL to avoid freeing the memory in this case. + */ + proc->uniqDir = template; template = NULL; if (qemuProcessQEMULabelUniqPath(proc) < 0) @@ -8481,6 +8484,10 @@ qemuProcessQMPInit(qemuProcessQMPPtr proc) */ proc->pidfile = g_strdup_printf("%s/%s", proc->uniqDir, "qmp.pid"); + virErrorPreserveLast(&orig_err); + if (virPidFileForceCleanupPath(proc->pidfile) < 0) + VIR_WARN("Unable to kill qemu QMP process"); + virErrorRestore(&orig_err); return 0; } -- 1.8.3.1