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/*
* Copyright (C) 2018 Facebook
*
* This file is part of libbtrfsutil.
*
* libbtrfsutil is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* libbtrfsutil is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with libbtrfsutil. If not, see <http://www.gnu.org/licenses/>.
*/
#include "btrfsutilpy.h"
PyObject *is_subvolume(PyObject *self, PyObject *args, PyObject *kwds)
{
static char *keywords[] = {"path", NULL};
struct path_arg path = {.allow_fd = true};
enum btrfs_util_error err;
if (!PyArg_ParseTupleAndKeywords(args, kwds, "O&:is_subvolume",
keywords, &path_converter, &path))
return NULL;
if (path.path)
err = btrfs_util_is_subvolume(path.path);
else
err = btrfs_util_is_subvolume_fd(path.fd);
if (err == BTRFS_UTIL_OK) {
path_cleanup(&path);
Py_RETURN_TRUE;
} else if (err == BTRFS_UTIL_ERROR_NOT_BTRFS ||
err == BTRFS_UTIL_ERROR_NOT_SUBVOLUME) {
path_cleanup(&path);
Py_RETURN_FALSE;
} else {
SetFromBtrfsUtilErrorWithPath(err, &path);
path_cleanup(&path);
return NULL;
}
}
PyObject *subvolume_id(PyObject *self, PyObject *args, PyObject *kwds)
{
static char *keywords[] = {"path", NULL};
struct path_arg path = {.allow_fd = true};
enum btrfs_util_error err;
uint64_t id;
if (!PyArg_ParseTupleAndKeywords(args, kwds, "O&:subvolume_id",
keywords, &path_converter, &path))
return NULL;
if (path.path)
err = btrfs_util_subvolume_id(path.path, &id);
else
err = btrfs_util_subvolume_id_fd(path.fd, &id);
if (err) {
SetFromBtrfsUtilErrorWithPath(err, &path);
path_cleanup(&path);
return NULL;
}
path_cleanup(&path);
return PyLong_FromUnsignedLongLong(id);
}
PyObject *subvolume_path(PyObject *self, PyObject *args, PyObject *kwds)
{
static char *keywords[] = {"path", "id", NULL};
struct path_arg path = {.allow_fd = true};
enum btrfs_util_error err;
uint64_t id = 0;
char *subvol_path;
PyObject *ret;
if (!PyArg_ParseTupleAndKeywords(args, kwds, "O&|K:subvolume_path",
keywords, &path_converter, &path, &id))
return NULL;
if (path.path)
err = btrfs_util_subvolume_path(path.path, id, &subvol_path);
else
err = btrfs_util_subvolume_path_fd(path.fd, id, &subvol_path);
if (err) {
SetFromBtrfsUtilErrorWithPath(err, &path);
path_cleanup(&path);
return NULL;
}
path_cleanup(&path);
ret = PyUnicode_DecodeFSDefault(subvol_path);
free(subvol_path);
return ret;
}
static PyObject *subvolume_info_to_object(const struct btrfs_util_subvolume_info *subvol)
{
PyObject *ret, *tmp;
ret = PyStructSequence_New(&SubvolumeInfo_type);
if (ret == NULL)
return NULL;
#define SET_UINT64(i, field) \
tmp = PyLong_FromUnsignedLongLong(subvol->field); \
if (tmp == NULL) { \
Py_DECREF(ret); \
return ret; \
} \
PyStructSequence_SET_ITEM(ret, i, tmp);
#define SET_UUID(i, field) \
tmp = PyBytes_FromStringAndSize((char *)subvol->field, 16); \
if (tmp == NULL) { \
Py_DECREF(ret); \
return ret; \
} \
PyStructSequence_SET_ITEM(ret, i, tmp);
#define SET_TIME(i, field) \
tmp = PyFloat_FromDouble(subvol->field.tv_sec + \
subvol->field.tv_nsec / 1000000000); \
if (tmp == NULL) { \
Py_DECREF(ret); \
return ret; \
} \
PyStructSequence_SET_ITEM(ret, i, tmp);
SET_UINT64(0, id);
SET_UINT64(1, parent_id);
SET_UINT64(2, dir_id);
SET_UINT64(3, flags);
SET_UUID(4, uuid);
SET_UUID(5, parent_uuid);
SET_UUID(6, received_uuid);
SET_UINT64(7, generation);
SET_UINT64(8, ctransid);
SET_UINT64(9, otransid);
SET_UINT64(10, stransid);
SET_UINT64(11, rtransid);
SET_TIME(12, ctime);
SET_TIME(13, otime);
SET_TIME(14, stime);
SET_TIME(15, rtime);
#undef SET_TIME
#undef SET_UUID
#undef SET_UINT64
return ret;
}
PyObject *subvolume_info(PyObject *self, PyObject *args, PyObject *kwds)
{
static char *keywords[] = {"path", "id", NULL};
struct path_arg path = {.allow_fd = true};
struct btrfs_util_subvolume_info subvol;
enum btrfs_util_error err;
uint64_t id = 0;
if (!PyArg_ParseTupleAndKeywords(args, kwds, "O&|K:subvolume_info",
keywords, &path_converter, &path, &id))
return NULL;
if (path.path)
err = btrfs_util_subvolume_info(path.path, id, &subvol);
else
err = btrfs_util_subvolume_info_fd(path.fd, id, &subvol);
if (err) {
SetFromBtrfsUtilErrorWithPath(err, &path);
path_cleanup(&path);
return NULL;
}
path_cleanup(&path);
return subvolume_info_to_object(&subvol);
}
static PyStructSequence_Field SubvolumeInfo_fields[] = {
{"id", "int ID of this subvolume"},
{"parent_id", "int ID of the subvolume containing this subvolume"},
{"dir_id", "int inode number of the directory containing this subvolume"},
{"flags", "int root item flags"},
{"uuid", "bytes UUID of this subvolume"},
{"parent_uuid", "bytes UUID of the subvolume this is a snapshot of"},
{"received_uuid", "bytes UUID of the subvolume this was received from"},
{"generation", "int transaction ID of the subvolume root"},
{"ctransid", "int transaction ID when an inode was last changed"},
{"otransid", "int transaction ID when this subvolume was created"},
{"stransid", "int transaction ID of the sent subvolume this subvolume was received from"},
{"rtransid", "int transaction ID when this subvolume was received"},
{"ctime", "float time when an inode was last changed"},
{"otime", "float time when this subvolume was created"},
{"stime", "float time, usually zero"},
{"rtime", "float time when this subvolume was received"},
{},
};
PyStructSequence_Desc SubvolumeInfo_desc = {
"btrfsutil.SubvolumeInfo",
"Information about a Btrfs subvolume.",
SubvolumeInfo_fields,
14,
};
PyTypeObject SubvolumeInfo_type;
PyObject *create_subvolume(PyObject *self, PyObject *args, PyObject *kwds)
{
static char *keywords[] = {"path", "async", "qgroup_inherit", NULL};
struct path_arg path = {.allow_fd = false};
enum btrfs_util_error err;
int async = 0;
QgroupInherit *inherit = NULL;
uint64_t transid;
if (!PyArg_ParseTupleAndKeywords(args, kwds, "O&|pO!:create_subvolume",
keywords, &path_converter, &path,
&async, &QgroupInherit_type, &inherit))
return NULL;
err = btrfs_util_create_subvolume(path.path, 0, async ? &transid : NULL,
inherit ? inherit->inherit : NULL);
if (err) {
SetFromBtrfsUtilErrorWithPath(err, &path);
path_cleanup(&path);
return NULL;
}
path_cleanup(&path);
if (async)
return PyLong_FromUnsignedLongLong(transid);
else
Py_RETURN_NONE;
}
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