1 files changed, 101 insertions, 0 deletions
diff --git a/ioreplay/src/generate/gprocess.c b/ioreplay/src/generate/gprocess.c
new file mode 100644
index 0000000..6a0b37a
--- /dev/null
+++ b/ioreplay/src/generate/gprocess.c
@@ -0,0 +1,101 @@
+// Copyright 2018 Mimecast Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "gprocess.h"
+
+#include "../vfd.h"
+#include "gioop.h"
+
+void _gprocess_vfd_map_destroy_cb(void *data)
+{
+    vfd_destroy(data);
+}
+
+gprocess_s* gprocess_new(const long pid, const long mapped_pid)
+{
+    gprocess_s* gp = Malloc(gprocess_s);
+
+    gp->pid = pid;
+    gp->mapped_pid = mapped_pid;
+    gp->max_mapped_fd = 0;
+    gp->fd_map = hmap_new_l(1024);
+    gp->vfd_map = hmap_new_l(1024);
+    gp->vfd_map->data_destroy = _gprocess_vfd_map_destroy_cb;
+
+    return gp;
+}
+
+void gprocess_destroy(gprocess_s *gp)
+{
+    hmap_destroy(gp->vfd_map);
+    hmap_destroy(gp->fd_map);
+    free(gp);
+}
+
+void gprocess_create_vfd_by_realfd(gprocess_s *gp, gtask_s *t, generate_s *g)
+{
+    if (t->fd < 0)
+        return;
+
+    // Check whether the real FD is still open according to the .capture log
+    long old_mapped = (long) hmap_get_l(gp->fd_map, t->fd);
+    if (old_mapped) {
+
+        // That real file descriptor is already with a mapping to a virtual
+        // file descriptor.  This may happen when SystemTap missed to trace a
+        // 'close' syscall. We are inserting a close now...
+
+        t->vfd = hmap_get_l(gp->vfd_map, old_mapped);
+
+        hmap_remove_l(gp->fd_map, t->fd);
+        hmap_remove_l(gp->vfd_map, old_mapped);
+
+        if (t->vfd) {
+            generate_vsize_by_path(g, t, t->vfd->path);
+            Gioop_write(CLOSE, "%ld|%d|close inserted", old_mapped, 0);
+            vsize_close(t->vsize, t->vfd);
+            if (!(rbuffer_insert(g->vfd_buffer, t->vfd)))
+                vfd_destroy(t->vfd);
+        }
+    }
+
+    t->vfd = rbuffer_get_next(g->vfd_buffer);
+    t->mapped_fd = ++g->num_mapped_fds;
+    if (!t->vfd)
+        t->vfd = vfd_new(t->fd, t->mapped_fd, t->path);
+    else
+        vfd_update(t->vfd, t->fd, t->mapped_fd, t->path);
+    t->vfd->free_path = t->path_r != NULL;
+
+    hmap_insert_l(gp->vfd_map, t->mapped_fd, t->vfd);
+    hmap_insert_l(gp->fd_map, t->fd, (void*)t->mapped_fd);
+}
+
+status_e gprocess_vfd_by_realfd(gprocess_s *gp, gtask_s *t)
+{
+    t->mapped_fd = (long) hmap_get_l(gp->fd_map, t->fd);
+    if (t->mapped_fd == 0) {
+        // No corresponding virtual fd number mapping
+        t->has_fd = false;
+
+    } else {
+        t->vfd = hmap_get_l(gp->vfd_map, t->mapped_fd);
+        if (!t->vfd) {
+            return ERROR;
+        }
+        t->mapped_fd = t->vfd->mapped_fd;
+    }
+
+    return SUCCESS;
+}