[sanlock] 09/18: python: Use PyBytes converter for rem_lockspace API

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nsoffer pushed a commit to branch master
in repository sanlock.

commit 0a130d251ee01ae1c062a92a534d008216c8c619
Author: Amit Bawer 
AuthorDate: Sun Jun 2 16:42:04 2019 +0300

python: Use PyBytes converter for rem_lockspace API

Implications:

- Py2 : no difference
    - Py3 : if used, only accept bytes for lockspace name.
---
 python/sanlock.c | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/python/sanlock.c b/python/sanlock.c
index 1fdb143..28146df 100644
--- a/python/sanlock.c
+++ b/python/sanlock.c
@@ -855,8 +855,9 @@ successful termination these leases will be released.");
 static PyObject *
 py_rem_lockspace(PyObject *self __unused, PyObject *args, PyObject *keywds)
 {
-    int rv, async = 0, unused = 0, flags = 0;
-    const char *lockspace, *path;
+    int rv = -1, async = 0, unused = 0, flags = 0;
+    PyObject *lockspace = NULL;
+    const char *path;
     struct sanlk_lockspace ls;

static char *kwlist[] = {"lockspace", "host_id", "path", "offset",
@@ -866,14 +867,14 @@ py_rem_lockspace(PyObject *self __unused, PyObject *args, PyObject *keywds)
     memset(&ls, 0, sizeof(struct sanlk_lockspace));

/* parse python tuple */
-    if (!PyArg_ParseTupleAndKeywords(args, keywds, "sks|kii", kwlist,
-        &lockspace, &ls.host_id, &path, &ls.host_id_disk.offset, &async,
-        &unused)) {
-        return NULL;
+    if (!PyArg_ParseTupleAndKeywords(args, keywds, "O&ks|kii", kwlist,
+        convert_to_pybytes, &lockspace, &ls.host_id, &path, &ls.host_id_disk.offset,
+        &async, &unused)) {
+        goto finally;
     }

/* prepare sanlock names */
-    strncpy(ls.name, lockspace, SANLK_NAME_LEN);
+    strncpy(ls.name, PyBytes_AsString(lockspace), SANLK_NAME_LEN);
     strncpy(ls.host_id_disk.path, path, SANLK_PATH_LEN - 1);

/* prepare sanlock_rem_lockspace flags */
@@ -892,9 +893,13 @@ py_rem_lockspace(PyObject *self __unused, PyObject *args, PyObject *keywds)

if (rv != 0) {
         __set_exception(rv, "Sanlock lockspace remove failure");
-        return NULL;
+        goto finally;
     }

+finally:
+    Py_XDECREF(lockspace);
+    if (rv != 0)
+        return NULL;
     Py_RETURN_NONE;
 }