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-rw-r--r--xlators/features/glupy/src/glupy.c405
1 files changed, 405 insertions, 0 deletions
diff --git a/xlators/features/glupy/src/glupy.c b/xlators/features/glupy/src/glupy.c
new file mode 100644
index 00000000000..9c06085b938
--- /dev/null
+++ b/xlators/features/glupy/src/glupy.c
@@ -0,0 +1,405 @@
+/*
+ Copyright (c) 2012 Red Hat, Inc. <http://www.redhat.com>
+ This file is part of GlusterFS.
+
+ GlusterFS is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3 of the License,
+ or (at your option) any later version.
+
+ GlusterFS 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
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see
+ <http://www.gnu.org/licenses/>.
+*/
+
+#include <ctype.h>
+#include <sys/uio.h>
+#include <python2.6/Python.h>
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "glusterfs.h"
+#include "xlator.h"
+#include "logging.h"
+#include "defaults.h"
+
+#include "glupy.h"
+
+/* UTILITY FUNCTIONS FOR FOP-SPECIFIC CODE */
+
+pthread_key_t gil_init_key;
+
+PyGILState_STATE
+glupy_enter (void)
+{
+#if 0
+ if (!pthread_getspecific(gil_init_key)) {
+ PyEval_ReleaseLock();
+ (void)pthread_setspecific(gil_init_key,(void *)1);
+ }
+#endif
+
+ return PyGILState_Ensure();
+}
+
+void
+glupy_leave (PyGILState_STATE gstate)
+{
+ PyGILState_Release(gstate);
+}
+
+/* FOP: LOOKUP */
+
+int32_t
+glupy_lookup_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, inode_t *inode,
+ struct iatt *buf, dict_t *xdata, struct iatt *postparent)
+{
+ glupy_private_t *priv = this->private;
+ PyGILState_STATE gstate;
+ int32_t ret;
+
+ if (!priv->cbks[GLUPY_LOOKUP]) {
+ goto unwind;
+ }
+
+ gstate = glupy_enter();
+ ret = ((fop_lookup_cbk_t)(priv->cbks[GLUPY_LOOKUP]))(
+ frame, cookie, this, op_ret, op_errno,
+ inode, buf, xdata, postparent);
+ glupy_leave(gstate);
+
+ return ret;
+
+unwind:
+ frame->local = NULL;
+ STACK_UNWIND_STRICT (lookup, frame, op_ret, op_errno, inode, buf,
+ xdata, postparent);
+ return 0;
+}
+
+int32_t
+glupy_lookup (call_frame_t *frame, xlator_t *this, loc_t *loc,
+ dict_t *xdata)
+{
+ glupy_private_t *priv = this->private;
+ PyGILState_STATE gstate;
+ int32_t ret;
+ static long next_id = 0;
+
+ if (!priv->fops[GLUPY_LOOKUP]) {
+ goto wind;
+ }
+
+ gstate = glupy_enter();
+ frame->local = (void *)++next_id;
+ ret = ((fop_lookup_t)(priv->fops[GLUPY_LOOKUP]))(
+ frame, this, loc, xdata);
+ glupy_leave(gstate);
+
+ return ret;
+
+wind:
+ STACK_WIND (frame, glupy_lookup_cbk, FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->lookup, loc, xdata);
+ return 0;
+}
+
+void
+wind_lookup (call_frame_t *frame, xlator_t *xl, loc_t *loc, dict_t *xdata)
+{
+
+ xlator_t *this = THIS;
+
+ if (!xl || (xl == this)) {
+ xl = FIRST_CHILD(this);
+ }
+
+ STACK_WIND(frame,glupy_lookup_cbk,xl,xl->fops->lookup,loc,xdata);
+}
+
+void
+unwind_lookup (call_frame_t *frame, long cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, inode_t *inode,
+ struct iatt *buf, dict_t *xdata, struct iatt *postparent)
+{
+ frame->local = NULL;
+ STACK_UNWIND_STRICT(lookup,frame,op_ret,op_errno,
+ inode,buf,xdata,postparent);
+}
+
+void
+set_lookup_fop (long py_this, fop_lookup_t fop)
+{
+ glupy_private_t *priv = ((xlator_t *)py_this)->private;
+
+ priv->fops[GLUPY_LOOKUP] = (long)fop;
+}
+
+void
+set_lookup_cbk (long py_this, fop_lookup_cbk_t cbk)
+{
+ glupy_private_t *priv = ((xlator_t *)py_this)->private;
+
+ priv->cbks[GLUPY_LOOKUP] = (long)cbk;
+}
+
+/* FOP: CREATE */
+
+int32_t
+glupy_create_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, fd_t *fd, inode_t *inode,
+ struct iatt *buf, struct iatt *preparent,
+ struct iatt *postparent, dict_t *xdata)
+{
+ glupy_private_t *priv = this->private;
+ PyGILState_STATE gstate;
+ int32_t ret;
+
+ if (!priv->cbks[GLUPY_CREATE]) {
+ goto unwind;
+ }
+
+ gstate = glupy_enter();
+ ret = ((fop_create_cbk_t)(priv->cbks[GLUPY_CREATE]))(
+ frame, cookie, this, op_ret, op_errno,
+ fd, inode, buf, preparent, postparent, xdata);
+ glupy_leave(gstate);
+
+ return ret;
+
+unwind:
+ frame->local = NULL;
+ STACK_UNWIND_STRICT (create, frame, op_ret, op_errno, fd, inode, buf,
+ preparent, postparent, xdata);
+ return 0;
+}
+
+int32_t
+glupy_create (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags,
+ mode_t mode, mode_t umask, fd_t *fd, dict_t *xdata)
+{
+ glupy_private_t *priv = this->private;
+ PyGILState_STATE gstate;
+ int32_t ret;
+ static long next_id = 0;
+
+ if (!priv->fops[GLUPY_CREATE]) {
+ goto wind;
+ }
+
+ gstate = glupy_enter();
+ frame->local = (void *)++next_id;
+ ret = ((fop_create_t)(priv->fops[GLUPY_CREATE]))(
+ frame, this, loc, flags, mode, umask, fd, xdata);
+ glupy_leave(gstate);
+
+ return ret;
+
+wind:
+ STACK_WIND (frame, glupy_create_cbk, FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->create, loc, flags, mode, umask,
+ fd, xdata);
+ return 0;
+}
+
+void
+wind_create (call_frame_t *frame, xlator_t *xl, loc_t *loc, int32_t flags,
+ mode_t mode, mode_t umask, fd_t *fd, dict_t *xdata)
+{
+
+ xlator_t *this = THIS;
+
+ if (!xl || (xl == this)) {
+ xl = FIRST_CHILD(this);
+ }
+
+ STACK_WIND (frame, glupy_create_cbk,xl, xl->fops->create,
+ loc, flags, mode, umask, fd, xdata);
+}
+
+void
+unwind_create (call_frame_t *frame, long cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, fd_t *fd, inode_t *inode,
+ struct iatt *buf, struct iatt *preparent,
+ struct iatt *postparent, dict_t *xdata)
+{
+ frame->local = NULL;
+ STACK_UNWIND_STRICT (create, frame, op_ret, op_errno, fd, inode, buf,
+ preparent, postparent, xdata);
+}
+
+void
+set_create_fop (long py_this, fop_create_t fop)
+{
+ glupy_private_t *priv = ((xlator_t *)py_this)->private;
+
+ priv->fops[GLUPY_CREATE] = (long)fop;
+}
+
+void
+set_create_cbk (long py_this, fop_create_cbk_t cbk)
+{
+ glupy_private_t *priv = ((xlator_t *)py_this)->private;
+
+ priv->cbks[GLUPY_CREATE] = (long)cbk;
+}
+
+/* NON-FOP-SPECIFIC CODE */
+
+long
+get_id (call_frame_t *frame)
+{
+ return (long)(frame->local);
+}
+
+int32_t
+init (xlator_t *this)
+{
+ glupy_private_t *priv = NULL;
+ char *module_name = NULL;
+ PyObject *py_mod_name = NULL;
+ PyObject *py_init_func = NULL;
+ PyObject *py_args = NULL;
+ PyObject *syspath = NULL;
+ PyObject *path = NULL;
+ static gf_boolean_t py_inited = _gf_false;
+ void * err_cleanup = &&err_return;
+
+ if (dict_get_str(this->options,"module-name",&module_name) != 0) {
+ gf_log (this->name, GF_LOG_ERROR, "missing module-name");
+ return -1;
+ }
+
+ priv = GF_CALLOC (1, sizeof (glupy_private_t), gf_glupy_mt_priv);
+ if (!priv) {
+ goto *err_cleanup;
+ }
+ this->private = priv;
+ err_cleanup = &&err_free_priv;
+
+ if (!py_inited) {
+ Py_Initialize();
+ PyEval_InitThreads();
+#if 0
+ (void)pthread_key_create(&gil_init_key,NULL);
+ (void)pthread_setspecific(gil_init_key,(void *)1);
+#endif
+ /* PyEval_InitThreads takes this "for" us. No thanks. */
+ PyEval_ReleaseLock();
+ py_inited = _gf_true;
+ }
+
+ /* Adjust python's path */
+ syspath = PySys_GetObject("path");
+ path = PyString_FromString(GLUSTER_PYTHON_PATH);
+ PyList_Append(syspath, path);
+ Py_DECREF(path);
+
+ py_mod_name = PyString_FromString(module_name);
+ if (!py_mod_name) {
+ gf_log (this->name, GF_LOG_ERROR, "could not create name");
+ if (PyErr_Occurred()) {
+ PyErr_Print();
+ }
+ goto *err_cleanup;
+ }
+
+ priv->py_module = PyImport_Import(py_mod_name);
+ Py_DECREF(py_mod_name);
+ if (!priv->py_module) {
+ gf_log (this->name, GF_LOG_ERROR, "Python import failed");
+ if (PyErr_Occurred()) {
+ PyErr_Print();
+ }
+ goto *err_cleanup;
+ }
+ err_cleanup = &&err_deref_module;
+
+ py_init_func = PyObject_GetAttrString(priv->py_module, "xlator");
+ if (!py_init_func || !PyCallable_Check(py_init_func)) {
+ gf_log (this->name, GF_LOG_ERROR, "missing init func");
+ if (PyErr_Occurred()) {
+ PyErr_Print();
+ }
+ goto *err_cleanup;
+ }
+ err_cleanup = &&err_deref_init;
+
+ py_args = PyTuple_New(1);
+ if (!py_args) {
+ gf_log (this->name, GF_LOG_ERROR, "could not create args");
+ if (PyErr_Occurred()) {
+ PyErr_Print();
+ }
+ goto *err_cleanup;
+ }
+ PyTuple_SetItem(py_args,0,PyLong_FromLong((long)this));
+
+ /* TBD: pass in list of children */
+ priv->py_xlator = PyObject_CallObject(py_init_func, py_args);
+ Py_DECREF(py_args);
+ if (!priv->py_xlator) {
+ gf_log (this->name, GF_LOG_ERROR, "Python init failed");
+ if (PyErr_Occurred()) {
+ PyErr_Print();
+ }
+ goto *err_cleanup;
+ }
+ gf_log (this->name, GF_LOG_INFO, "init returned %p", priv->py_xlator);
+
+ return 0;
+
+err_deref_init:
+ Py_DECREF(py_init_func);
+err_deref_module:
+ Py_DECREF(priv->py_module);
+err_free_priv:
+ GF_FREE(priv);
+err_return:
+ return -1;
+}
+
+void
+fini (xlator_t *this)
+{
+ int i = 0;
+ glupy_private_t *priv = this->private;
+
+ if (!priv)
+ return;
+ for (i = 0; i < GLUPY_N_FUNCS; ++i) {
+ if (priv->fops[i]) {
+ Py_DECREF(priv->fops[i]);
+ }
+ if (priv->cbks[i]) {
+ Py_DECREF(priv->fops[i]);
+ }
+ }
+ Py_DECREF(priv->py_xlator);
+ Py_DECREF(priv->py_module);
+ this->private = NULL;
+ GF_FREE (priv);
+
+ return;
+}
+
+struct xlator_fops fops = {
+ .lookup = glupy_lookup,
+ .create = glupy_create,
+};
+
+struct xlator_cbks cbks = {
+};
+
+struct volume_options options[] = {
+ { .key = {NULL} },
+};