Merge branch 'syscall-interface' into 'develop-BA-FS26'

Add fs syscall handler

See merge request teachos/kernel!23

1 files changed, 64 insertions, 0 deletions

diff --git a/kernel/kapi/filesystem.cpp b/kernel/kapi/filesystem.cpp
new file mode 100644
index 0000000..30201b7
--- /dev/null
+++ b/kernel/kapi/filesystem.cpp
@@ -0,0 +1,64 @@
+#include "kapi/filesystem.hpp"
+
+#include "kernel/filesystem/file_descriptor_table.hpp"
+#include "kernel/filesystem/vfs.hpp"
+
+#include <cstddef>
+#include <string_view>
+#include <sys/types.h>
+
+namespace kapi::filesystem
+{
+  auto mount(std::string_view source, std::string_view target) -> int
+  {
+    if (kernel::filesystem::vfs::get().do_mount(source, target) == kernel::filesystem::vfs::operation_result::success)
+    {
+      return 0;
+    }
+    return -1;
+  }
+
+  auto umount(std::string_view target) -> int
+  {
+    if (kernel::filesystem::vfs::get().unmount(target) == kernel::filesystem::vfs::operation_result::success)
+    {
+      return 0;
+    }
+    return -1;
+  }
+
+  auto open(std::string_view path) -> int
+  {
+    if (auto open_file_description = kernel::filesystem::vfs::get().open(path))
+    {
+      return kernel::filesystem::file_descriptor_table::get().add_file(open_file_description);
+    }
+
+    return -1;
+  }
+
+  auto close(int fd) -> int
+  {
+    return kernel::filesystem::file_descriptor_table::get().remove_file(fd);
+  }
+
+  auto read(int fd, void * buffer, size_t size) -> ssize_t
+  {
+    if (auto open_file_description = kernel::filesystem::file_descriptor_table::get().get_file(fd))
+    {
+      return open_file_description->read(buffer, size);
+    }
+
+    return -1;
+  }
+
+  auto write(int fd, void const * buffer, size_t size) -> ssize_t
+  {
+    if (auto open_file_description = kernel::filesystem::file_descriptor_table::get().get_file(fd))
+    {
+      return open_file_description->write(buffer, size);
+    }
+
+    return -1;
+  }
+}  // namespace kapi::filesystem
\ No newline at end of file