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nodedev: add ability to list defined mdevs

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This adds an internal API to query for persistent mediated devices
that are defined by mdevctl. Upcoming commits will make use of this
information.

Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
This commit is contained in:
Jonathon Jongsma 2020-07-10 17:12:18 -05:00
parent 58d093a55f
commit 066c13de66
4 changed files with 66 additions and 0 deletions
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20
src/node_device/node_device_driver.c
View File

@ -861,6 +861,26 @@ virMdevctlStop(virNodeDeviceDefPtr def, char **errmsg)
}
virCommand*
nodeDeviceGetMdevctlListCommand(bool defined,
char **output,
char **errmsg)
{
virCommand *cmd = virCommandNewArgList(MDEVCTL,
"list",
"--dumpjson",
NULL);
if (defined)
virCommandAddArg(cmd, "--defined");
virCommandSetOutputBuffer(cmd, output);
virCommandSetErrorBuffer(cmd, errmsg);
return cmd;
}
static void mdevGenerateDeviceName(virNodeDeviceDef *dev)
{
nodeDeviceGenerateName(dev, "mdev", dev->caps->data.mdev.uuid, NULL);

5
src/node_device/node_device_driver.h
View File

@ -121,6 +121,11 @@ virCommandPtr
nodeDeviceGetMdevctlStopCommand(const char *uuid,
char **errmsg);
virCommandPtr
nodeDeviceGetMdevctlListCommand(bool defined,
char **output,
char **errmsg);
int
nodeDeviceParseMdevctlJSON(const char *jsonstring,
virNodeDeviceDef ***devs);

1
tests/nodedevmdevctldata/mdevctl-list-defined.argv Normal file
View File

@ -0,0 +1 @@
$MDEVCTL_BINARY$ list --dumpjson --defined

40
tests/nodedevmdevctltest.c
View File

@ -145,6 +145,41 @@ testMdevctlStop(const void *data)
return ret;
}
static int
testMdevctlListDefined(const void *data G_GNUC_UNUSED)
{
virBuffer buf = VIR_BUFFER_INITIALIZER;
const char *actualCmdline = NULL;
int ret = -1;
g_autoptr(virCommand) cmd = NULL;
g_autofree char *output = NULL;
g_autofree char *errmsg = NULL;
g_autofree char *cmdlinefile =
g_strdup_printf("%s/nodedevmdevctldata/mdevctl-list-defined.argv",
abs_srcdir);
cmd = nodeDeviceGetMdevctlListCommand(true, &output, &errmsg);
if (!cmd)
goto cleanup;
virCommandSetDryRun(&buf, NULL, NULL);
if (virCommandRun(cmd, NULL) < 0)
goto cleanup;
if (!(actualCmdline = virBufferCurrentContent(&buf)))
goto cleanup;
if (nodedevCompareToFile(actualCmdline, cmdlinefile) < 0)
goto cleanup;
ret = 0;
cleanup:
virBufferFreeAndReset(&buf);
virCommandSetDryRun(NULL, NULL, NULL);
return ret;
}
static int
testMdevctlParse(const void *data)
@ -328,6 +363,9 @@ mymain(void)
#define DO_TEST_STOP(uuid) \
DO_TEST_FULL("mdevctl stop " uuid, testMdevctlStop, uuid)
#define DO_TEST_LIST_DEFINED() \
DO_TEST_FULL("mdevctl list --defined", testMdevctlListDefined, NULL)
#define DO_TEST_PARSE_JSON(filename) \
DO_TEST_FULL("parse mdevctl json " filename, testMdevctlParse, filename)
@ -339,6 +377,8 @@ mymain(void)
/* Test mdevctl stop command, pass an arbitrary uuid */
DO_TEST_STOP("e2451f73-c95b-4124-b900-e008af37c576");
DO_TEST_LIST_DEFINED();
DO_TEST_PARSE_JSON("mdevctl-list-multiple");
done: