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test_driver: extract image loading code into a separate function

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Extracting the code logic for opening and parsing a test image from
testDomainRestoreFlags into a separate function, allows us to reuse this
code in other functions such as testDomainSaveImageGetXMLDesc.

Signed-off-by: Ilias Stamatis <stamatis.iliass@gmail.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
This commit is contained in:
Ilias Stamatis 2019-06-10 11:04:59 +02:00 committed by Erik Skultety
parent 1dfa29f806
commit d6650b2620
1 changed files with 73 additions and 43 deletions
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116
src/test/test_driver.c
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@ -2075,6 +2075,78 @@ testDomainSaveImageWrite(testDriverPtr driver,
}
/**
* testDomainSaveImageOpen:
* @driver: test driver data
* @path: path of the saved image
* @ret_def: returns domain definition created from the XML stored in the image
*
* Returns the opened fd of the save image file and fills ret_def on success.
* Returns -1, on error.
*/
static int ATTRIBUTE_NONNULL(3)
testDomainSaveImageOpen(testDriverPtr driver,
const char *path,
virDomainDefPtr *ret_def)
{
char magic[15];
int fd = -1;
int len;
virDomainDefPtr def = NULL;
VIR_AUTOFREE(char *) xml = NULL;
if ((fd = open(path, O_RDONLY)) < 0) {
virReportSystemError(errno, _("cannot read domain image '%s'"), path);
goto error;
}
if (saferead(fd, magic, sizeof(magic)) != sizeof(magic)) {
virReportSystemError(errno, _("incomplete save header in '%s'"), path);
goto error;
}
if (memcmp(magic, TEST_SAVE_MAGIC, sizeof(magic))) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("mismatched header magic"));
goto error;
}
if (saferead(fd, (char*)&len, sizeof(len)) != sizeof(len)) {
virReportSystemError(errno,
_("failed to read metadata length in '%s'"),
path);
goto error;
}
if (len < 1 || len > 8192) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("length of metadata out of range"));
goto error;
}
if (VIR_ALLOC_N(xml, len+1) < 0)
goto error;
if (saferead(fd, xml, len) != len) {
virReportSystemError(errno, _("incomplete metadata in '%s'"), path);
goto error;
}
xml[len] = '\0';
if (!(def = virDomainDefParseString(xml, driver->caps, driver->xmlopt, NULL,
VIR_DOMAIN_DEF_PARSE_INACTIVE |
VIR_DOMAIN_DEF_PARSE_SKIP_VALIDATE)))
goto error;
VIR_STEAL_PTR(*ret_def, def);
return fd;
error:
virDomainDefFree(def);
VIR_FORCE_CLOSE(fd);
return -1;
}
static int
testDomainSaveFlags(virDomainPtr domain, const char *path,
const char *dxml, unsigned int flags)
@ -2130,14 +2202,11 @@ testDomainRestoreFlags(virConnectPtr conn,
unsigned int flags)
{
testDriverPtr privconn = conn->privateData;
char magic[15];
int fd = -1;
int len;
virDomainDefPtr def = NULL;
virDomainObjPtr dom = NULL;
virObjectEventPtr event = NULL;
int ret = -1;
VIR_AUTOFREE(char *) xml = NULL;
virCheckFlags(0, -1);
if (dxml) {
@ -2146,46 +2215,7 @@ testDomainRestoreFlags(virConnectPtr conn,
return -1;
}
if ((fd = open(path, O_RDONLY)) < 0) {
virReportSystemError(errno,
_("cannot read domain image '%s'"),
path);
goto cleanup;
}
if (saferead(fd, magic, sizeof(magic)) != sizeof(magic)) {
virReportSystemError(errno,
_("incomplete save header in '%s'"),
path);
goto cleanup;
}
if (memcmp(magic, TEST_SAVE_MAGIC, sizeof(magic))) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("mismatched header magic"));
goto cleanup;
}
if (saferead(fd, (char*)&len, sizeof(len)) != sizeof(len)) {
virReportSystemError(errno,
_("failed to read metadata length in '%s'"),
path);
goto cleanup;
}
if (len < 1 || len > 8192) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("length of metadata out of range"));
goto cleanup;
}
if (VIR_ALLOC_N(xml, len+1) < 0)
goto cleanup;
if (saferead(fd, xml, len) != len) {
virReportSystemError(errno,
_("incomplete metadata in '%s'"), path);
goto cleanup;
}
xml[len] = '\0';
def = virDomainDefParseString(xml, privconn->caps, privconn->xmlopt,
NULL, VIR_DOMAIN_DEF_PARSE_INACTIVE);
if (!def)
if ((fd = testDomainSaveImageOpen(privconn, path, &def)) < 0)
goto cleanup;
if (testDomainGenerateIfnames(def) < 0)