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libvhost-user: Factor out removing all mem regions

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Let's factor it out. Note that the check for MAP_FAILED was wrong as
we never set mmap_addr if mmap() failed. We'll remove the NULL check
separately.

Reviewed-by: Raphael Norwitz <raphael@enfabrica.net>
Acked-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20240214151701.29906-4-david@redhat.com>
Tested-by: Mario Casquero <mcasquer@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
David Hildenbrand 2024-02-14 16:16:50 +01:00 committed by Michael S. Tsirkin
parent 0fa6344c90
commit bec5820908
1 changed files with 18 additions and 16 deletions
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34
subprojects/libvhost-user/libvhost-user.c
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@ -240,6 +240,22 @@ qva_to_va(VuDev *dev, uint64_t qemu_addr)
return NULL;
}
static void
vu_remove_all_mem_regs(VuDev *dev)
{
unsigned int i;
for (i = 0; i < dev->nregions; i++) {
VuDevRegion *r = &dev->regions[i];
void *ma = (void *)(uintptr_t)r->mmap_addr;
if (ma) {
munmap(ma, r->size + r->mmap_offset);
}
}
dev->nregions = 0;
}
static void
vmsg_close_fds(VhostUserMsg *vmsg)
{
@ -1003,14 +1019,7 @@ vu_set_mem_table_exec(VuDev *dev, VhostUserMsg *vmsg)
unsigned int i;
VhostUserMemory m = vmsg->payload.memory, *memory = &m;
for (i = 0; i < dev->nregions; i++) {
VuDevRegion *r = &dev->regions[i];
void *ma = (void *) (uintptr_t) r->mmap_addr;
if (ma) {
munmap(ma, r->size + r->mmap_offset);
}
}
vu_remove_all_mem_regs(dev);
dev->nregions = memory->nregions;
if (dev->postcopy_listening) {
@ -2112,14 +2121,7 @@ vu_deinit(VuDev *dev)
{
unsigned int i;
for (i = 0; i < dev->nregions; i++) {
VuDevRegion *r = &dev->regions[i];
void *m = (void *) (uintptr_t) r->mmap_addr;
if (m != MAP_FAILED) {
munmap(m, r->size + r->mmap_offset);
}
}
dev->nregions = 0;
vu_remove_all_mem_regs(dev);
for (i = 0; i < dev->max_queues; i++) {
VuVirtq *vq = &dev->vq[i];