--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+
+#include "acconfig.h"
+
+#include <unistd.h>
+#include "dumb_backend.h"
+
+string DumbBackend::get_full_path(const string &oid)
+{
+ return path + "/" + oid;
+}
+
+void DumbBackend::_write(
+ const string &oid,
+ uint64_t offset,
+ const bufferlist &bl,
+ Context *on_applied,
+ Context *on_commit)
+{
+ string full_path(get_full_path(oid));
+ int fd = ::open(
+ full_path.c_str(), O_CREAT|O_WRONLY, 0777);
+ if (fd < 0) {
+ std::cout << full_path << ": errno is " << errno << std::endl;
+ ceph_abort();
+ }
+
+ int r = ::lseek(fd, offset, SEEK_SET);
+ if (r < 0) {
+ r = errno;
+ std::cout << "lseek failed, errno is: " << r << std::endl;
+ ::close(fd);
+ return;
+ }
+ bl.write_fd(fd);
+ on_applied->complete(0);
+ if (do_fsync)
+ ::fsync(fd);
+#ifdef HAVE_SYNC_FILE_RANGE
+ if (do_sync_file_range)
+ ::sync_file_range(fd, offset, bl.length(),
+ SYNC_FILE_RANGE_WAIT_AFTER);
+#else
+# warning "sync_file_range not supported!"
+#endif
+#ifdef HAVE_POSIX_FADVISE
+ if (do_fadvise) {
+ int fa_r = ::posix_fadvise(fd, offset, bl.length(), POSIX_FADV_DONTNEED);
+ if (fa_r) {
+ std::cout << "posix_fadvise failed, errno is: " << fa_r << std::endl;
+ }
+ }
+#else
+# warning "posix_fadvise not supported!"
+#endif
+ ::close(fd);
+ {
+ Mutex::Locker l(pending_commit_mutex);
+ pending_commits.insert(on_commit);
+ }
+ sem.Put();
+}
+
+void DumbBackend::read(
+ const string &oid,
+ uint64_t offset,
+ uint64_t length,
+ bufferlist *bl,
+ Context *on_complete)
+{
+ string full_path(get_full_path(oid));
+ int fd = ::open(
+ full_path.c_str(), 0, O_RDONLY);
+ if (fd < 0) return;
+
+ int r = ::lseek(fd, offset, SEEK_SET);
+ if (r < 0) {
+ r = errno;
+ std::cout << "lseek failed, errno is: " << r << std::endl;
+ ::close(fd);
+ return;
+ }
+
+ bl->read_fd(fd, length);
+ ::close(fd);
+ on_complete->complete(0);
+}
+
+void DumbBackend::sync_loop()
+{
+ while (1) {
+ sleep(sync_interval);
+ {
+ Mutex::Locker l(sync_loop_mutex);
+ if (sync_loop_stop != 0) {
+ sync_loop_stop = 2;
+ sync_loop_cond.Signal();
+ break;
+ }
+ }
+ tp.pause();
+#ifdef HAVE_SYS_SYNCFS
+ ::syncfs(sync_fd);
+#else
+ ::sync();
+#endif
+ {
+ Mutex::Locker l(pending_commit_mutex);
+ for (set<Context*>::iterator i = pending_commits.begin();
+ i != pending_commits.end();
+ pending_commits.erase(i++)) {
+ (*i)->complete(0);
+ }
+ }
+ tp.unpause();
+ }
+}