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exec: add parameter errp to gethugepagesize

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Add parameter errp to gethugepagesize thus callers can handle errors.

If user adds a memory-backend-file object using object_add command,
specifying a non-existing directory for property mem-path, qemu will
core dump with message:

  /nonexistingdir: No such file or directory
  Bad ram offset fffffffffffff000
  Aborted (core dumped)

This patch fixes the problem. With this patch, qemu reports an error
message like:

  qemu-system-x86_64: -object memory-backend-file,mem-path=/nonexistingdir,id=mem-file0,size=128M:
  failed to get page size of file /nonexistingdir: No such file or directory

Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Hu Tao 2014-09-09 13:28:01 +08:00 committed by Paolo Bonzini
parent 557529dd60
commit fc7a5800ad
1 changed files with 7 additions and 4 deletions
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11
exec.c
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@ -1031,7 +1031,7 @@ void qemu_mutex_unlock_ramlist(void)
#define HUGETLBFS_MAGIC 0x958458f6
static long gethugepagesize(const char *path)
static long gethugepagesize(const char *path, Error **errp)
{
struct statfs fs;
int ret;
@ -1041,7 +1041,8 @@ static long gethugepagesize(const char *path)
} while (ret != 0 && errno == EINTR);
if (ret != 0) {
perror(path);
error_setg_errno(errp, errno, "failed to get page size of file %s",
path);
return 0;
}
@ -1062,9 +1063,11 @@ static void *file_ram_alloc(RAMBlock *block,
void *area = NULL;
int fd;
uint64_t hpagesize;
Error *local_err = NULL;
hpagesize = gethugepagesize(path);
if (!hpagesize) {
hpagesize = gethugepagesize(path, &local_err);
if (local_err) {
error_propagate(errp, local_err);
goto error;
}