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[Qemu-devel] [PATCH v4 41/47] ivshmem: do not keep shm_fd open
From: |
marcandre . lureau |
Subject: |
[Qemu-devel] [PATCH v4 41/47] ivshmem: do not keep shm_fd open |
Date: |
Thu, 24 Sep 2015 13:37:43 +0200 |
From: Marc-André Lureau <address@hidden>
Remove shm_fd from device state, closing it as early as possible to avoid leaks.
Signed-off-by: Marc-André Lureau <address@hidden>
---
hw/misc/ivshmem.c | 16 +++++-----------
1 file changed, 5 insertions(+), 11 deletions(-)
diff --git a/hw/misc/ivshmem.c b/hw/misc/ivshmem.c
index fc1de8d..273db36 100644
--- a/hw/misc/ivshmem.c
+++ b/hw/misc/ivshmem.c
@@ -88,7 +88,6 @@ typedef struct IVShmemState {
MemoryRegion ivshmem;
uint64_t ivshmem_size; /* size of shared memory region */
uint32_t ivshmem_64bit;
- int shm_fd; /* shared memory file descriptor */
Peer *peers;
int nb_peers; /* how many peers we have space for */
@@ -235,7 +234,7 @@ static uint64_t ivshmem_io_read(void *opaque, hwaddr addr,
case IVPOSITION:
/* return my VM ID if the memory is mapped */
- if (s->shm_fd >= 0) {
+ if (memory_region_is_mapped(&s->ivshmem)) {
ret = s->vm_id;
} else {
ret = -1;
@@ -356,8 +355,6 @@ static int create_shared_memory_BAR(IVShmemState *s, int
fd, uint8_t attr,
return -1;
}
- s->shm_fd = fd;
-
memory_region_init_ram_ptr(&s->ivshmem, OBJECT(s), "ivshmem.bar2",
s->ivshmem_size, ptr);
vmstate_register_ram(&s->ivshmem, DEVICE(s));
@@ -535,7 +532,7 @@ static void ivshmem_read(void *opaque, const uint8_t *buf,
int size)
if (incoming_posn == -1) {
void * map_ptr;
- if (s->shm_fd >= 0) {
+ if (memory_region_is_mapped(&s->ivshmem)) {
error_report("shm already initialized");
close(incoming_fd);
return;
@@ -564,9 +561,7 @@ static void ivshmem_read(void *opaque, const uint8_t *buf,
int size)
memory_region_add_subregion(&s->bar, 0, &s->ivshmem);
- /* only store the fd if it is successfully mapped */
- s->shm_fd = incoming_fd;
-
+ close(incoming_fd);
return;
}
@@ -707,8 +702,6 @@ static void pci_ivshmem_realize(PCIDevice *dev, Error
**errp)
PCI_BASE_ADDRESS_MEM_PREFETCH;
Error *local_err = NULL;
- s->shm_fd = -1;
-
if (s->sizearg == NULL) {
s->ivshmem_size = 4 << 20; /* 4 MB default */
} else {
@@ -830,6 +823,7 @@ static void pci_ivshmem_realize(PCIDevice *dev, Error
**errp)
}
create_shared_memory_BAR(s, fd, attr, errp);
+ close(fd);
}
}
@@ -845,7 +839,7 @@ static void pci_ivshmem_exit(PCIDevice *dev)
error_free(s->migration_blocker);
}
- if (s->shm_fd >= 0) {
+ if (memory_region_is_mapped(&s->ivshmem)) {
void *addr = memory_region_get_ram_ptr(&s->ivshmem);
vmstate_unregister_ram(&s->ivshmem, DEVICE(dev));
--
2.4.3
- [Qemu-devel] [PATCH v4 32/47] ivshmem-client: check the number of vectors, (continued)
- [Qemu-devel] [PATCH v4 32/47] ivshmem-client: check the number of vectors, marcandre . lureau, 2015/09/24
- [Qemu-devel] [PATCH v4 33/47] ivshmem-server: use a uint16 for client ID, marcandre . lureau, 2015/09/24
- [Qemu-devel] [PATCH v4 34/47] ivshmem-server: fix hugetlbfs support, marcandre . lureau, 2015/09/24
- [Qemu-devel] [PATCH v4 31/47] contrib: add ivshmem client and server, marcandre . lureau, 2015/09/24
- [Qemu-devel] [PATCH v4 35/47] docs: update ivshmem device spec, marcandre . lureau, 2015/09/24
- [Qemu-devel] [PATCH v4 37/47] contrib: remove unnecessary strdup(), marcandre . lureau, 2015/09/24
- [Qemu-devel] [PATCH v4 38/47] msix: implement pba write (but read-only), marcandre . lureau, 2015/09/24
- [Qemu-devel] [PATCH v4 36/47] ivshmem: add check on protocol version in QEMU, marcandre . lureau, 2015/09/24
- [Qemu-devel] [PATCH v4 39/47] qtest: add qtest_add_abrt_handler(), marcandre . lureau, 2015/09/24
- [Qemu-devel] [PATCH v4 40/47] tests: add ivshmem qtest, marcandre . lureau, 2015/09/24
- [Qemu-devel] [PATCH v4 41/47] ivshmem: do not keep shm_fd open,
marcandre . lureau <=
- [Qemu-devel] [PATCH v4 42/47] ivshmem: use strtosz(), marcandre . lureau, 2015/09/24
- [Qemu-devel] [PATCH v4 44/47] ivshmem: remove EventfdEntry.vector, marcandre . lureau, 2015/09/24
- [Qemu-devel] [PATCH v4 43/47] ivshmem: add hostmem backend, marcandre . lureau, 2015/09/24
- [Qemu-devel] [PATCH v4 45/47] ivshmem: rename MSI eventfd_table, marcandre . lureau, 2015/09/24
- [Qemu-devel] [PATCH v4 46/47] ivshmem: use kvm irqfd for msi notifications, marcandre . lureau, 2015/09/24
- [Qemu-devel] [PATCH v4 47/47] ivshmem: use little-endian int64_t for the protocol, marcandre . lureau, 2015/09/24