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memfd: improve error messages

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This gives more information about the failure.
Additionally 'ENOSYS' returned for a non-Linux platforms instead of
'errno', which is not initilaized in this case.

Signed-off-by: Ilya Maximets <i.maximets@samsung.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20190311135850.6537-5-i.maximets@samsung.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Ilya Maximets 2019-03-11 16:58:50 +03:00 committed by Eduardo Habkost
parent df20819328
commit edaed6c711
1 changed files with 6 additions and 1 deletions
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7
util/memfd.c
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@ -71,14 +71,18 @@ int qemu_memfd_create(const char *name, size_t size, bool hugetlb,
}
mfd = memfd_create(name, flags);
if (mfd < 0) {
error_setg_errno(errp, errno,
"failed to create memfd with flags 0x%x", flags);
goto err;
}
if (ftruncate(mfd, size) == -1) {
error_setg_errno(errp, errno, "failed to resize memfd to %zu", size);
goto err;
}
if (seals && fcntl(mfd, F_ADD_SEALS, seals) == -1) {
error_setg_errno(errp, errno, "failed to add seals 0x%x", seals);
goto err;
}
@ -88,8 +92,9 @@ err:
if (mfd >= 0) {
close(mfd);
}
#else
error_setg_errno(errp, ENOSYS, "failed to create memfd");
#endif
error_setg_errno(errp, errno, "failed to create memfd");
return -1;
}