[libvirt] [PATCH v3 1/9] qemu: Add helper to assign RNG device aliases

This function is used to assign an alias for a RNG device. It will be later reused when hotplugging RNGs. Signed-off-by: Luyao Huang <lhuang(a)redhat.com&gt; --- src/qemu/qemu_command.c | 25 ++++++++++++++++++++++++- src/qemu/qemu_command.h | 1 + 2 files changed, 25 insertions(+), 1 deletion(-) diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index c041ee7..52741fe 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -910,6 +910,29 @@ qemuGetNextChrDevIndex(virDomainDefPtr def, return idx; } +int +qemuAssignDeviceRNGAlias(virDomainDefPtr def, virDomainRNGDefPtr rng, int idx) +{ + if (idx == -1) { + size_t i; + idx = 0; + for (i = 0; i < def->nrngs; i++) { + int thisidx; + if ((thisidx = qemuDomainDeviceAliasIndex(&def->rngs[i]->info, "rng")) < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("Unable to determine device index for RNG device")); + return -1; + } + if (thisidx >= idx) + idx = thisidx + 1; + } + } + + if (virAsprintf(&rng->info.alias, "rng%d", idx) < 0) + return -1; + + return 0; +} int qemuAssignDeviceChrAlias(virDomainDefPtr def, @@ -1036,7 +1059,7 @@ qemuAssignDeviceAliases(virDomainDefPtr def, virQEMUCapsPtr qemuCaps) return -1; } for (i = 0; i < def->nrngs; i++) { - if (virAsprintf(&def->rngs[i]->info.alias, "rng%zu", i) < 0) + if (qemuAssignDeviceRNGAlias(def, def->rngs[i], i) < 0) return -1; } if (def->tpm) { diff --git a/src/qemu/qemu_command.h b/src/qemu/qemu_command.h index dcc7127..fc5f50a 100644 --- a/src/qemu/qemu_command.h +++ b/src/qemu/qemu_command.h @@ -264,6 +264,7 @@ int qemuAssignDeviceRedirdevAlias(virDomainDefPtr def, virDomainRedirdevDefPtr r int qemuAssignDeviceChrAlias(virDomainDefPtr def, virDomainChrDefPtr chr, ssize_t idx); +int qemuAssignDeviceRNGAlias(virDomainDefPtr def, virDomainRNGDefPtr rng, int idx); int qemuParseKeywords(const char *str, -- 1.8.3.1