1 files changed, 243 insertions, 0 deletions
diff --git a/fuse/fuse_session.c b/fuse/fuse_session.c
new file mode 100644
index 000000000..18c8c4249
--- /dev/null
+++ b/fuse/fuse_session.c
@@ -0,0 +1,243 @@
+/*
+  FUSE: Filesystem in Userspace
+  Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
+
+  This program can be distributed under the terms of the GNU LGPLv2.
+  See the file COPYING.LIB
+*/
+
+#include "fuse_i.h"
+#include "fuse_misc.h"
+#include "fuse_common_compat.h"
+#include "fuse_lowlevel_compat.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <errno.h>
+
+struct fuse_chan {
+	struct fuse_chan_ops op;
+
+	struct fuse_session *se;
+
+	int fd;
+
+	size_t bufsize;
+
+	void *data;
+
+	int compat;
+};
+
+struct fuse_session *fuse_session_new(struct fuse_session_ops *op, void *data)
+{
+	struct fuse_session *se = (struct fuse_session *) malloc(sizeof(*se));
+	if (se == NULL) {
+		fprintf(stderr, "fuse: failed to allocate session\n");
+		return NULL;
+	}
+
+	memset(se, 0, sizeof(*se));
+	se->op = *op;
+	se->data = data;
+
+	return se;
+}
+
+void fuse_session_add_chan(struct fuse_session *se, struct fuse_chan *ch)
+{
+	assert(se->ch == NULL);
+	assert(ch->se == NULL);
+	se->ch = ch;
+	ch->se = se;
+}
+
+void fuse_session_remove_chan(struct fuse_chan *ch)
+{
+	struct fuse_session *se = ch->se;
+	if (se) {
+		assert(se->ch == ch);
+		se->ch = NULL;
+		ch->se = NULL;
+	}
+}
+
+struct fuse_chan *fuse_session_next_chan(struct fuse_session *se,
+					 struct fuse_chan *ch)
+{
+	assert(ch == NULL || ch == se->ch);
+	if (ch == NULL)
+		return se->ch;
+	else
+		return NULL;
+}
+
+void fuse_session_process(struct fuse_session *se, const char *buf, size_t len,
+			  struct fuse_chan *ch)
+{
+	se->op.process(se->data, buf, len, ch);
+}
+
+void fuse_session_process_buf(struct fuse_session *se,
+			      const struct fuse_buf *buf, struct fuse_chan *ch)
+{
+	if (se->process_buf) {
+		se->process_buf(se->data, buf, ch);
+	} else {
+		assert(!(buf->flags & FUSE_BUF_IS_FD));
+		fuse_session_process(se->data, buf->mem, buf->size, ch);
+	}
+}
+
+int fuse_session_receive_buf(struct fuse_session *se, struct fuse_buf *buf,
+			     struct fuse_chan **chp)
+{
+	int res;
+
+	if (se->receive_buf) {
+		res = se->receive_buf(se, buf, chp);
+	} else {
+		res = fuse_chan_recv(chp, buf->mem, buf->size);
+		if (res > 0)
+			buf->size = res;
+	}
+
+	return res;
+}
+
+
+void fuse_session_destroy(struct fuse_session *se)
+{
+	if (se->op.destroy)
+		se->op.destroy(se->data);
+	if (se->ch != NULL)
+		fuse_chan_destroy(se->ch);
+	free(se);
+}
+
+void fuse_session_exit(struct fuse_session *se)
+{
+	if (se->op.exit)
+		se->op.exit(se->data, 1);
+	se->exited = 1;
+}
+
+void fuse_session_reset(struct fuse_session *se)
+{
+	if (se->op.exit)
+		se->op.exit(se->data, 0);
+	se->exited = 0;
+}
+
+int fuse_session_exited(struct fuse_session *se)
+{
+	if (se->op.exited)
+		return se->op.exited(se->data);
+	else
+		return se->exited;
+}
+
+void *fuse_session_data(struct fuse_session *se)
+{
+	return se->data;
+}
+
+static struct fuse_chan *fuse_chan_new_common(struct fuse_chan_ops *op, int fd,
+					      size_t bufsize, void *data,
+					      int compat)
+{
+	struct fuse_chan *ch = (struct fuse_chan *) malloc(sizeof(*ch));
+	if (ch == NULL) {
+		fprintf(stderr, "fuse: failed to allocate channel\n");
+		return NULL;
+	}
+
+	memset(ch, 0, sizeof(*ch));
+	ch->op = *op;
+	ch->fd = fd;
+	ch->bufsize = bufsize;
+	ch->data = data;
+	ch->compat = compat;
+
+	return ch;
+}
+
+struct fuse_chan *fuse_chan_new(struct fuse_chan_ops *op, int fd,
+				size_t bufsize, void *data)
+{
+	return fuse_chan_new_common(op, fd, bufsize, data, 0);
+}
+
+struct fuse_chan *fuse_chan_new_compat24(struct fuse_chan_ops_compat24 *op,
+					 int fd, size_t bufsize, void *data)
+{
+	return fuse_chan_new_common((struct fuse_chan_ops *) op, fd, bufsize,
+				    data, 24);
+}
+
+int fuse_chan_fd(struct fuse_chan *ch)
+{
+	return ch->fd;
+}
+
+int fuse_chan_clearfd(struct fuse_chan *ch)
+{
+	if (ch == NULL)
+		return -1;
+
+	int fd = ch->fd;
+	ch->fd = -1;
+	return fd;
+}
+
+size_t fuse_chan_bufsize(struct fuse_chan *ch)
+{
+	return ch->bufsize;
+}
+
+void *fuse_chan_data(struct fuse_chan *ch)
+{
+	return ch->data;
+}
+
+struct fuse_session *fuse_chan_session(struct fuse_chan *ch)
+{
+	return ch->se;
+}
+
+int fuse_chan_recv(struct fuse_chan **chp, char *buf, size_t size)
+{
+	struct fuse_chan *ch = *chp;
+	if (ch->compat)
+		return ((struct fuse_chan_ops_compat24 *) &ch->op)
+			->receive(ch, buf, size);
+	else
+		return ch->op.receive(chp, buf, size);
+}
+
+int fuse_chan_receive(struct fuse_chan *ch, char *buf, size_t size)
+{
+	int res;
+
+	res = fuse_chan_recv(&ch, buf, size);
+	return res >= 0 ? res : (res != -EINTR && res != -EAGAIN) ? -1 : 0;
+}
+
+int fuse_chan_send(struct fuse_chan *ch, const struct iovec iov[], size_t count)
+{
+	return ch->op.send(ch, iov, count);
+}
+
+void fuse_chan_destroy(struct fuse_chan *ch)
+{
+	fuse_session_remove_chan(ch);
+	if (ch->op.destroy)
+		ch->op.destroy(ch);
+	free(ch);
+}
+
+#ifndef __FreeBSD__
+FUSE_SYMVER(".symver fuse_chan_new_compat24,fuse_chan_new@FUSE_2.4");
+#endif