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memory: add error propagation to file-based RAM allocation

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Right now, -mem-path will fall back to RAM-based allocation in some
cases.  This should never happen with "-object memory-file", prepare
the code by adding correct error propagation.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

MST: drop \n at end of error messages
This commit is contained in:
Paolo Bonzini 2014-05-14 17:43:20 +08:00 • committed by Michael S. Tsirkin
parent 0b183fc871
commit 7f56e740a6
5 changed files with 44 additions and 17 deletions
Download patch file Download diff file Expand all files Collapse all files

36
exec.c
View file

@ -1016,7 +1016,8 @@ static long gethugepagesize(const char *path)
static void *file_ram_alloc(RAMBlock *block,
ram_addr_t memory,
const char *path)
const char *path,
Error **errp)
{
char *filename;
char *sanitized_name;
@ -1035,7 +1036,8 @@ static void *file_ram_alloc(RAMBlock *block,
}
if (kvm_enabled() && !kvm_has_sync_mmu()) {
fprintf(stderr, "host lacks kvm mmu notifiers, -mem-path unsupported\n");
error_setg(errp,
"host lacks kvm mmu notifiers, -mem-path unsupported");
goto error;
}
@ -1052,7 +1054,8 @@ static void *file_ram_alloc(RAMBlock *block,
fd = mkstemp(filename);
if (fd < 0) {
perror("unable to create backing store for hugepages");
error_setg_errno(errp, errno,
"unable to create backing store for hugepages");
g_free(filename);
goto error;
}
@ -1067,12 +1070,14 @@ static void *file_ram_alloc(RAMBlock *block,
* If anything goes wrong with it under other filesystems,
* mmap will fail.
*/
if (ftruncate(fd, memory))
if (ftruncate(fd, memory)) {
perror("ftruncate");
}
area = mmap(0, memory, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
if (area == MAP_FAILED) {
perror("file_ram_alloc: can't mmap RAM pages");
error_setg_errno(errp, errno,
"unable to map backing store for hugepages");
close(fd);
goto error;
}
@ -1281,13 +1286,14 @@ static ram_addr_t ram_block_add(RAMBlock *new_block)
#ifdef __linux__
ram_addr_t qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion *mr,
const char *mem_path)
const char *mem_path,
Error **errp)
{
RAMBlock *new_block;
if (xen_enabled()) {
fprintf(stderr, "-mem-path not supported with Xen\n");
exit(1);
error_setg(errp, "-mem-path not supported with Xen");
return -1;
}
if (phys_mem_alloc != qemu_anon_ram_alloc) {
@ -1296,16 +1302,22 @@ ram_addr_t qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion *mr,
* phys_mem_alloc, but we haven't bothered to provide
* a hook there.
*/
fprintf(stderr,
"-mem-path not supported with this accelerator\n");
exit(1);
error_setg(errp,
"-mem-path not supported with this accelerator");
return -1;
}
size = TARGET_PAGE_ALIGN(size);
new_block = g_malloc0(sizeof(*new_block));
new_block->mr = mr;
new_block->length = size;
new_block->host = file_ram_alloc(new_block, size, mem_path);
new_block->host = file_ram_alloc(new_block, size,
mem_path, errp);
if (!new_block->host) {
g_free(new_block);
return -1;
}
return ram_block_add(new_block);
}
#endif