enhance tar/zfile checking

src/overlaybd/lsmt/file.cpp

@@ -1528,7 +1528,7 @@ void *do_parallel_load_index(void *param) {
             return nullptr;
         }
         auto file = job->get_file();
-        LOG_INFO("check file if normalfile or LSMTFile");
+        LOG_INFO("check `-th file is normal file or LSMT file", job->i);
         IMemoryIndex *pi = nullptr;
         LSMT::SegmentMapping *p = nullptr;
         auto type = file->ioctl(IFileRO::GetType);
@@ -1560,6 +1560,7 @@ void *do_parallel_load_index(void *param) {
             LOG_ERROR_RETURN(0, nullptr, "failed to create memory index!");
         }
         job->set_index(pi);
+        LOG_INFO("load index from `-th file done", job->i);
     }
     return NULL;
 }

src/overlaybd/registryfs/registryfs.cpp

@@ -425,7 +425,7 @@ class RegistryFileImpl : public photon::fs::VirtualReadOnlyFile {
                 LOG_WARN("failed to perform HTTP GET, going to retry ", VALUE(code), VALUE(offset),
                          VALUE(count), VALUE(ret_len), eno);
 
-                photon::thread_usleep(1000);
+                photon::thread_usleep(10000);
                 goto again;
             } else {
                 LOG_ERROR_RETURN(ENOENT, -1, "failed to perform HTTP GET ", VALUE(m_url),

src/overlaybd/tar/tar_file.cpp

@@ -301,20 +301,23 @@ class TarFs : public ForwardFS_Ownership {
 
 int is_tar_file(IFile *file) {
     TarHeader th_buf;
-    if (file->pread(&th_buf, T_BLOCKSIZE, 0) != T_BLOCKSIZE) {
-        LOG_DEBUG("error read tar file header");
+    auto ret = file->pread(&th_buf, T_BLOCKSIZE, 0);
+    if (ret < 0) {
+        LOG_ERROR_RETURN(0, -1, "read tar file header failed");
+    } else if (ret != T_BLOCKSIZE) {
+        LOG_WARN("read tar file header error, expect `, ret `", T_BLOCKSIZE, ret);
         return 0;
     }
     if (strncmp(th_buf.magic, TMAGIC, TMAGLEN - 1) != 0) {
-        LOG_DEBUG("unknown magic value in tar header");
+        LOG_INFO("unknown magic value in tar header");
         return 0;
     }
     if (strncmp(th_buf.version, TVERSION, TVERSLEN) != 0) {
-        LOG_DEBUG("unknown version value in tar header");
+        LOG_INFO("unknown version value in tar header");
         return 0;
     }
     if (!th_buf.crc_ok()) {
-        LOG_DEBUG("tar header checksum error");
+        LOG_INFO("tar header checksum error");
         return 0;
     }
     return 1;
@@ -329,11 +332,16 @@ IFile *new_tar_file(IFile *file, bool create) {
 }
 
 IFile *open_tar_file(IFile *file) {
-    if (is_tar_file(file) == 1) {
+    auto ret = is_tar_file(file);
+    if (ret == 1) {
+        LOG_INFO("open file as tar file");
         return new_tar_file(file);
+    } else if (ret == 0) {
+        LOG_INFO("open file as normal file");
+        return file;
+    } else {
+        LOG_ERROR_RETURN(0, nullptr, "open tar file failed");
     }
-    LOG_DEBUG("not tar file, open as normal file");
-    return file; // open as normal file
 }
 
 IFileSystem *new_tar_fs_adaptor(IFileSystem *fs) {

src/overlaybd/zfile/zfile.cpp

@@ -938,6 +938,9 @@ int zfile_validation_check(IFile *src) {
 }
 
 int is_zfile(IFile *file) {
+    if (!file) {
+        LOG_ERROR_RETURN(0, -1, "file is nullptr.");
+    }
     char buf[CompressionFile::HeaderTrailer::SPACE];
     auto ret = file->pread(buf, CompressionFile::HeaderTrailer::SPACE, 0);
     if (ret < (ssize_t)CompressionFile::HeaderTrailer::SPACE)

src/switch_file.cpp

@@ -49,8 +49,10 @@ static IFile *try_open_zfile(IFile *file, bool verify, const char *file_path) {
             LOG_ERROR_RETURN(0, nullptr, "zfile_open_ro failed, path: `: error: `(`)", file_path,
                              errno, strerror(errno));
         }
+        LOG_INFO("open file as zfile");
         return zf;
     }
+    LOG_INFO("file is not zfile format");
     return file;
 }
 
@@ -83,6 +85,10 @@ class SwitchFile : public ISwitchFile {
         }
 
         file = try_open_zfile(new_tar_file_adaptor(file), false, m_filepath.c_str());
+        if (file == nullptr) {
+            LOG_ERROR("failed to open commit file as zfile, path: `", m_filepath);
+            return;
+        }
         LOG_INFO("switch to localfile '`' success.", m_filepath);
         m_local_file = file;
     }

src/tools/overlaybd-zfile.cpp

@@ -41,7 +41,7 @@ IFileSystem *lfs = nullptr;
 
 int verify_crc(IFile* src_file) {
 
-    if (!is_zfile(src_file)) {
+    if (is_zfile(src_file) != 1) {
         fprintf(stderr, "format error! <source_file> should be a zfile.\n");
         exit(-1);
     }