Use plain git hash for VERSION when there is no exact tag.
[dcpomatic.git] / src / lib / ext.cc
index b88a88726b99c6f79fc5b91398b2a54487ec8281..25946df73234c027f4ffa5552e4608b7aa908157 100644 (file)
@@ -27,6 +27,8 @@
 #include "exceptions.h"
 #include "ext.h"
 #include "nanomsg.h"
+#include <dcp/file.h>
+#include <dcp/filesystem.h>
 
 #ifdef DCPOMATIC_LINUX
 #include <linux/fs.h>
@@ -57,6 +59,7 @@ extern "C" {
 #include <lwext4/ext4_mkfs.h>
 }
 #include <boost/filesystem.hpp>
+#include <chrono>
 #include <string>
 
 
@@ -71,23 +74,39 @@ using std::vector;
 
 
 /* Use quite a big block size here, as ext4's fwrite() has quite a bit of overhead */
-static uint64_t const block_size = 4096 * 4096;
+uint64_t constexpr block_size = 4096 * 4096;
 
 
 static
 void
-count (boost::filesystem::path dir, uint64_t& total_bytes)
+count (std::vector<boost::filesystem::path> dirs, uint64_t& total_bytes)
 {
        using namespace boost::filesystem;
-       for (directory_iterator i = directory_iterator(dir); i != directory_iterator(); ++i) {
-               if (is_directory(*i)) {
-                       count (*i, total_bytes);
-               } else {
-                       total_bytes += file_size (*i);
+
+       for (auto dir: dirs) {
+               dir = dcp::filesystem::fix_long_path(dir);
+               for (auto path: directory_iterator(dir)) {
+                       if (is_directory(path)) {
+                               count({path}, total_bytes);
+                       } else {
+                               total_bytes += file_size(path);
+                       }
                }
        }
 }
 
+
+static
+void
+set_timestamps_to_now (boost::filesystem::path path)
+{
+       auto const now = std::chrono::duration_cast<std::chrono::seconds>(std::chrono::system_clock::now().time_since_epoch()).count();
+       ext4_mtime_set (path.generic_string().c_str(), now);
+       ext4_ctime_set (path.generic_string().c_str(), now);
+       ext4_atime_set (path.generic_string().c_str(), now);
+}
+
+
 static
 string
 write (boost::filesystem::path from, boost::filesystem::path to, uint64_t& total_remaining, uint64_t total, Nanomsg* nanomsg)
@@ -95,16 +114,16 @@ write (boost::filesystem::path from, boost::filesystem::path to, uint64_t& total
        ext4_file out;
        int r = ext4_fopen(&out, to.generic_string().c_str(), "wb");
        if (r != EOK) {
-               throw CopyError (String::compose("Failed to open file %1", to.generic_string()), r);
+               throw CopyError(String::compose("Failed to open file %1", to.generic_string()), r, ext4_blockdev_errno);
        }
 
-       FILE* in = fopen_boost (from, "rb");
+       dcp::File in(from, "rb");
        if (!in) {
                ext4_fclose (&out);
-               throw CopyError (String::compose("Failed to open file %1", from.string()), 0);
+               throw CopyError(String::compose("Failed to open file %1", from.string()), 0);
        }
 
-       uint8_t* buffer = new uint8_t[block_size];
+       std::vector<uint8_t> buffer(block_size);
        Digester digester;
 
        int progress_frequency = 1;
@@ -112,42 +131,36 @@ write (boost::filesystem::path from, boost::filesystem::path to, uint64_t& total
        uint64_t remaining = file_size (from);
        while (remaining > 0) {
                uint64_t const this_time = min(remaining, block_size);
-               size_t read = fread (buffer, 1, this_time, in);
+               size_t read = in.read(buffer.data(), 1, this_time);
                if (read != this_time) {
-                       fclose (in);
                        ext4_fclose (&out);
-                       delete[] buffer;
-                       throw CopyError (String::compose("Short read; expected %1 but read %2", this_time, read), 0);
+                       throw CopyError(String::compose("Short read; expected %1 but read %2", this_time, read), 0, ext4_blockdev_errno);
                }
 
-               digester.add (buffer, this_time);
+               digester.add (buffer.data(), this_time);
 
                size_t written;
-               r = ext4_fwrite (&out, buffer, this_time, &written);
+               r = ext4_fwrite (&out, buffer.data(), this_time, &written);
                if (r != EOK) {
-                       fclose (in);
                        ext4_fclose (&out);
-                       delete[] buffer;
-                       throw CopyError ("Write failed", r);
+                       throw CopyError("Write failed", r, ext4_blockdev_errno);
                }
                if (written != this_time) {
-                       fclose (in);
                        ext4_fclose (&out);
-                       delete[] buffer;
-                       throw CopyError (String::compose("Short write; expected %1 but wrote %2", this_time, written), 0);
+                       throw CopyError(String::compose("Short write; expected %1 but wrote %2", this_time, written), 0, ext4_blockdev_errno);
                }
                remaining -= this_time;
                total_remaining -= this_time;
 
                ++progress_count;
                if ((progress_count % progress_frequency) == 0 && nanomsg) {
-                       nanomsg->send(String::compose(DISK_WRITER_COPY_PROGRESS "\n%1\n", (1 - float(total_remaining) / total)), SHORT_TIMEOUT);
+                       DiskWriterBackEndResponse::copy_progress(1 - float(total_remaining) / total).write_to_nanomsg(*nanomsg, SHORT_TIMEOUT);
                }
        }
 
-       fclose (in);
        ext4_fclose (&out);
-       delete[] buffer;
+
+       set_timestamps_to_now (to);
 
        return digester.get ();
 }
@@ -165,30 +178,28 @@ read (boost::filesystem::path from, boost::filesystem::path to, uint64_t& total_
        }
        LOG_DISK("Opened %1 for read", to.generic_string());
 
-       uint8_t* buffer = new uint8_t[block_size];
+       std::vector<uint8_t> buffer(block_size);
        Digester digester;
 
        uint64_t remaining = file_size (from);
        while (remaining > 0) {
                uint64_t const this_time = min(remaining, block_size);
                size_t read;
-               r = ext4_fread (&in, buffer, this_time, &read);
+               r = ext4_fread (&in, buffer.data(), this_time, &read);
                if (read != this_time) {
                        ext4_fclose (&in);
-                       delete[] buffer;
                        throw VerifyError (String::compose("Short read; expected %1 but read %2", this_time, read), 0);
                }
 
-               digester.add (buffer, this_time);
+               digester.add (buffer.data(), this_time);
                remaining -= this_time;
                total_remaining -= this_time;
                if (nanomsg) {
-                       nanomsg->send(String::compose(DISK_WRITER_VERIFY_PROGRESS "\n%1\n", (1 - float(total_remaining) / total)), SHORT_TIMEOUT);
+                       DiskWriterBackEndResponse::verify_progress(1 - float(total_remaining) / total).write_to_nanomsg(*nanomsg, SHORT_TIMEOUT);
                }
        }
 
        ext4_fclose (&in);
-       delete[] buffer;
 
        return digester.get ();
 }
@@ -218,6 +229,7 @@ void
 copy (boost::filesystem::path from, boost::filesystem::path to, uint64_t& total_remaining, uint64_t total, vector<CopiedFile>& copied_files, Nanomsg* nanomsg)
 {
        LOG_DISK ("Copy %1 -> %2", from.string(), to.generic_string());
+       from = dcp::filesystem::fix_long_path(from);
 
        using namespace boost::filesystem;
 
@@ -226,11 +238,12 @@ copy (boost::filesystem::path from, boost::filesystem::path to, uint64_t& total_
        if (is_directory(from)) {
                int r = ext4_dir_mk (cr.generic_string().c_str());
                if (r != EOK) {
-                       throw CopyError (String::compose("Failed to create directory %1", cr.generic_string()), r);
+                       throw CopyError(String::compose("Failed to create directory %1", cr.generic_string()), r, ext4_blockdev_errno);
                }
+               set_timestamps_to_now (cr);
 
-               for (directory_iterator i = directory_iterator(from); i != directory_iterator(); ++i) {
-                       copy (i->path(), cr, total_remaining, total, copied_files, nanomsg);
+               for (auto i: directory_iterator(from)) {
+                       copy (i.path(), cr, total_remaining, total, copied_files, nanomsg);
                }
        } else {
                string const write_digest = write (from, cr, total_remaining, total, nanomsg);
@@ -260,27 +273,41 @@ void
 format_progress (void* context, float progress)
 {
        if (context) {
-               reinterpret_cast<Nanomsg*>(context)->send(String::compose(DISK_WRITER_FORMAT_PROGRESS "\n%1\n", progress), SHORT_TIMEOUT);
+               DiskWriterBackEndResponse::format_progress(progress).write_to_nanomsg(*reinterpret_cast<Nanomsg*>(context), SHORT_TIMEOUT);
        }
 }
 
 
 void
 #ifdef DCPOMATIC_WINDOWS
-dcpomatic::write (boost::filesystem::path dcp_path, string device, string, Nanomsg* nanomsg)
+dcpomatic::write (vector<boost::filesystem::path> dcp_paths, string device, string, Nanomsg* nanomsg)
 #else
-dcpomatic::write (boost::filesystem::path dcp_path, string device, string posix_partition, Nanomsg* nanomsg)
+dcpomatic::write (vector<boost::filesystem::path> dcp_paths, string device, string posix_partition, Nanomsg* nanomsg)
 #endif
 try
 {
        ext4_dmask_set (DEBUG_ALL);
 
-       /* We rely on static initialization for these */
-       static struct ext4_fs fs;
-       static struct ext4_mkfs_info info;
+       struct ext4_fs fs;
+       fs.read_only = false;
+       fs.bdev = nullptr;
+       fs.last_inode_bg_id = 0;
+       fs.jbd_fs = nullptr;
+       fs.jbd_journal = nullptr;
+       fs.curr_trans = nullptr;
+       struct ext4_mkfs_info info;
+       info.len = 0;
        info.block_size = 4096;
+       info.blocks_per_group = 0;
        info.inode_size = 128;
+       info.inodes = 0;
+       info.journal_blocks = 0;
+       info.dsc_size = 0;
+       for (int i = 0; i < UUID_SIZE; ++i) {
+               info.uuid[i] = rand() & 0xff;
+       }
        info.journal = false;
+       info.label = nullptr;
 
 #ifdef WIN32
        file_windows_name_set(device.c_str());
@@ -291,7 +318,7 @@ try
 #endif
 
        if (!bd) {
-               throw CopyError ("Failed to open drive", 0);
+               throw CopyError("Failed to open drive", 0, ext4_blockdev_errno);
        }
        LOG_DISK_NC ("Opened drive");
 
@@ -301,21 +328,17 @@ try
        parts.division[2] = 0;
        parts.division[3] = 0;
 
-#ifdef DCPOMATIC_LINUX
-       PrivilegeEscalator e;
-#endif
-
        /* XXX: not sure if disk_id matters */
        int r = ext4_mbr_write (bd, &parts, 0);
        if (r) {
-               throw CopyError ("Failed to write MBR", r);
+               throw CopyError("Failed to write MBR", r, ext4_blockdev_errno);
        }
        LOG_DISK_NC ("Wrote MBR");
 
        struct ext4_mbr_bdevs bdevs;
        r = ext4_mbr_scan (bd, &bdevs);
        if (r != EOK) {
-               throw CopyError ("Failed to read MBR", r);
+               throw CopyError("Failed to read MBR", r, ext4_blockdev_errno);
        }
 
 #ifdef DCPOMATIC_LINUX
@@ -331,47 +354,61 @@ try
        file_windows_partition_set (bdevs.partitions[0].part_offset, bdevs.partitions[0].part_size);
 #else
        file_dev_name_set (posix_partition.c_str());
+
+       /* On macOS (at least) if you try to write to a drive that is sleeping the ext4_mkfs call
+        * below is liable to return EIO because it can't open the device.  Try to work around that
+        * here by opening and closing the device, waiting 5 seconds if it fails.
+        */
+       int wake = open(posix_partition.c_str(), O_RDWR);
+       if (wake == -1) {
+               dcpomatic_sleep_seconds (5);
+       } else {
+               close(wake);
+       }
+
        bd = file_dev_get ();
 #endif
 
        if (!bd) {
-               throw CopyError ("Failed to open partition", 0);
+               throw CopyError("Failed to open partition", 0, ext4_blockdev_errno);
        }
        LOG_DISK_NC ("Opened partition");
 
        r = ext4_mkfs(&fs, bd, &info, F_SET_EXT2, format_progress, nanomsg);
        if (r != EOK) {
-               throw CopyError ("Failed to make filesystem", r);
+               throw CopyError("Failed to make filesystem", r, ext4_blockdev_errno);
        }
        LOG_DISK_NC ("Made filesystem");
 
        r = ext4_device_register(bd, "ext4_fs");
        if (r != EOK) {
-               throw CopyError ("Failed to register device", r);
+               throw CopyError("Failed to register device", r, ext4_blockdev_errno);
        }
        LOG_DISK_NC ("Registered device");
 
        r = ext4_mount("ext4_fs", "/mp/", false);
        if (r != EOK) {
-               throw CopyError ("Failed to mount device", r);
+               throw CopyError("Failed to mount device", r, ext4_blockdev_errno);
        }
        LOG_DISK_NC ("Mounted device");
 
        uint64_t total_bytes = 0;
-       count (dcp_path, total_bytes);
+       count (dcp_paths, total_bytes);
 
        uint64_t total_remaining = total_bytes;
        vector<CopiedFile> copied_files;
-       copy (dcp_path, "/mp", total_remaining, total_bytes, copied_files, nanomsg);
+       for (auto dcp_path: dcp_paths) {
+               copy (dcp_path, "/mp", total_remaining, total_bytes, copied_files, nanomsg);
+       }
 
        /* Unmount and re-mount to make sure the write has finished */
        r = ext4_umount("/mp/");
        if (r != EOK) {
-               throw CopyError ("Failed to unmount device", r);
+               throw CopyError("Failed to unmount device", r, ext4_blockdev_errno);
        }
        r = ext4_mount("ext4_fs", "/mp/", false);
        if (r != EOK) {
-               throw CopyError ("Failed to mount device", r);
+               throw CopyError("Failed to mount device", r, ext4_blockdev_errno);
        }
        LOG_DISK_NC ("Re-mounted device");
 
@@ -379,29 +416,29 @@ try
 
        r = ext4_umount("/mp/");
        if (r != EOK) {
-               throw CopyError ("Failed to unmount device", r);
+               throw CopyError("Failed to unmount device", r, ext4_blockdev_errno);
        }
 
        ext4_device_unregister("ext4_fs");
-       if (nanomsg && !nanomsg->send(DISK_WRITER_OK "\n", LONG_TIMEOUT)) {
+       if (nanomsg && !DiskWriterBackEndResponse::ok().write_to_nanomsg(*nanomsg, LONG_TIMEOUT)) {
                throw CommunicationFailedError ();
        }
 
        disk_write_finished ();
 } catch (CopyError& e) {
-       LOG_DISK("CopyError (from write): %1 %2", e.message(), e.number().get_value_or(0));
+       LOG_DISK("CopyError (from write): %1 %2 %3", e.message(), e.ext4_number().get_value_or(0), e.platform_number().get_value_or(0));
        if (nanomsg) {
-               nanomsg->send(String::compose(DISK_WRITER_ERROR "\n%1\n%2\n", e.message(), e.number().get_value_or(0)), LONG_TIMEOUT);
+               DiskWriterBackEndResponse::error(e.message(), e.ext4_number().get_value_or(0), e.platform_number().get_value_or(0)).write_to_nanomsg(*nanomsg, LONG_TIMEOUT);
        }
 } catch (VerifyError& e) {
        LOG_DISK("VerifyError (from write): %1 %2", e.message(), e.number());
        if (nanomsg) {
-               nanomsg->send(String::compose(DISK_WRITER_ERROR "\n%1\n%2\n", e.message(), e.number()), LONG_TIMEOUT);
+               DiskWriterBackEndResponse::error(e.message(), e.number(), 0).write_to_nanomsg(*nanomsg, LONG_TIMEOUT);
        }
 } catch (exception& e) {
        LOG_DISK("Exception (from write): %1", e.what());
        if (nanomsg) {
-               nanomsg->send(String::compose(DISK_WRITER_ERROR "\n%1\n0\n", e.what()), LONG_TIMEOUT);
+               DiskWriterBackEndResponse::error(e.what(), 0, 0).write_to_nanomsg(*nanomsg, LONG_TIMEOUT);
        }
 }