[cache_writeback] stub cache_writeback
This commit is contained in:
Joe Thornber
parent
4c0d5c96a0
commit
b8659853bb
@ -41,6 +41,7 @@ SOURCE=\
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caching/cache_metadata_size.cc \
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caching/cache_repair.cc \
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caching/cache_restore.cc \
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caching/cache_writeback.cc \
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caching/commands.cc \
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caching/hint_array.cc \
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caching/mapping_array.cc \
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@ -216,6 +217,7 @@ install: bin/pdata_tools
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ln -s -f pdata_tools $(BINDIR)/cache_metadata_size
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ln -s -f pdata_tools $(BINDIR)/cache_repair
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ln -s -f pdata_tools $(BINDIR)/cache_restore
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ln -s -f pdata_tools $(BINDIR)/cache_writeback
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ln -s -f pdata_tools $(BINDIR)/thin_check
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ln -s -f pdata_tools $(BINDIR)/thin_delta
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ln -s -f pdata_tools $(BINDIR)/thin_dump
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@ -235,6 +237,7 @@ install: bin/pdata_tools
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$(INSTALL_DATA) man8/cache_dump.8 $(MANPATH)/man8
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$(INSTALL_DATA) man8/cache_repair.8 $(MANPATH)/man8
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$(INSTALL_DATA) man8/cache_restore.8 $(MANPATH)/man8
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$(INSTALL_DATA) man8/cache_writeback.8 $(MANPATH)/man8
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$(INSTALL_DATA) man8/thin_check.8 $(MANPATH)/man8
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$(INSTALL_DATA) man8/thin_delta.8 $(MANPATH)/man8
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$(INSTALL_DATA) man8/thin_dump.8 $(MANPATH)/man8
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122
caching/cache_writeback.cc
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122
caching/cache_writeback.cc
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@ -0,0 +1,122 @@
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#ifndef CACHING_CACHE_WRITEBACK_H
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#define CACHING_CACHE_WRITEBACK_H
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#include "caching/commands.h"
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#include "version.h"
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#include <boost/optional.hpp>
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#include <getopt.h>
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#include <string>
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using namespace caching;
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using namespace boost;
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using namespace std;
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//----------------------------------------------------------------
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namespace {
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struct flags {
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using maybe_string = boost::optional<string>;
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maybe_string metadata_dev;
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maybe_string origin_dev;
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maybe_string fast_dev;
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};
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int writeback(flags const &f) {
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return 1;
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}
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}
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//----------------------------------------------------------------
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cache_writeback_cmd::cache_writeback_cmd()
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: command("cache_writeback")
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{
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}
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void
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cache_writeback_cmd::usage(std::ostream &out) const
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{
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out << "Usage: " << get_name() << " [options]\n"
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<< "\t\t--metadata-device <dev>\n"
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<< "\t\t--origin-device <dev>\n"
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<< "\t\t--fast-device <dev>\n"
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<< "Options:\n"
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<< " {-h|--help}\n"
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<< " {-V|--version}" << endl;
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}
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int
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cache_writeback_cmd::run(int argc, char **argv)
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{
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int c;
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flags fs;
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char const *short_opts = "hV";
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option const long_opts[] = {
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{ "metadata-device", required_argument, NULL, 0 },
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{ "origin-device", required_argument, NULL, 1 },
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{ "fast-device", required_argument, NULL, 2 },
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{ "help", no_argument, NULL, 'h'},
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{ "version", no_argument, NULL, 'V'},
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{ NULL, no_argument, NULL, 0 }
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};
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while ((c = getopt_long(argc, argv, short_opts, long_opts, NULL)) != -1) {
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switch(c) {
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case 0:
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fs.metadata_dev = optarg;
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break;
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case 1:
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fs.origin_dev = optarg;
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break;
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case 2:
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fs.fast_dev = optarg;
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break;
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case 'h':
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usage(cout);
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return 0;
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case 'V':
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cout << THIN_PROVISIONING_TOOLS_VERSION << endl;
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return 0;
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default:
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usage(cerr);
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return 1;
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}
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}
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if (argc != optind) {
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usage(cerr);
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return 1;
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}
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if (!fs.metadata_dev) {
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cerr << "No metadata device provided.\n\n";
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usage(cerr);
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return 1;
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}
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if (!fs.origin_dev) {
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cerr << "No origin device provided.\n\n";
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usage(cerr);
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return 1;
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}
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if (!fs.fast_dev) {
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cerr << "No fast device provided.\n\n";
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usage(cerr);
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return 1;
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}
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return writeback(fs);
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}
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//----------------------------------------------------------------
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#endif
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@ -13,6 +13,7 @@ caching::register_cache_commands(application &app)
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app.add_cmd(command::ptr(new cache_metadata_size_cmd));
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app.add_cmd(command::ptr(new cache_restore_cmd));
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app.add_cmd(command::ptr(new cache_repair_cmd));
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app.add_cmd(command::ptr(new cache_writeback_cmd));
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}
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//----------------------------------------------------------------
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@ -63,6 +63,13 @@ namespace caching {
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virtual int run(int argc, char **argv);
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};
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class cache_writeback_cmd : public base::command {
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public:
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cache_writeback_cmd();
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virtual void usage(std::ostream &out) const;
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virtual int run(int argc, char **argv);
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};
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void register_cache_commands(base::application &app);
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}
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53
man8/cache_writeback.8
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53
man8/cache_writeback.8
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@ -0,0 +1,53 @@
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.TH CACHE_WRITEBACK 8 "Thin Provisioning Tools" "Red Hat, Inc." \" -*- nroff -*-
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.SH NAME
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cache_writeback \- writeback dirty blocks to the origin device.
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.SH SYNOPSIS
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.B cache_writeback
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.RB [ options ]
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.RB --metadata-device
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.I {device|file}
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.RB --origin-device
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.I {device|file}
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.RB --fast-device
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.I {device|file}
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.SH DESCRIPTION
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.B cache_writeback
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An offline tool that writesback dirty data to the data device
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(origin). Intended for use in recovery scenarios when the SSD is
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giving IO errors.
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This tool cannot be run on a live cache.
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.SH OPTIONS
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.IP "\fB\\-\-metadata\-device\fP \fI{device|file}\fP"
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Location of cache metadata.
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.IP "\fB\-\-origin\-device\fP \fI{device|file}\fP"
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Slow device being cached.
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.IP "\fB\-\-fast\-device\fP \fI{device|file}\fP"
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Fast device containing the data that needs to be written back.
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.IP "\fB\-\-skip\-metadata\-update\fP"
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Do not update the metadata to clear the dirty flags for written back
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data. You may not want to do this if you're decommissioning the
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cache.
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.IP "\fB\-h, \-\-help\fP"
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Print help and exit.
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.IP "\fB\-V, \-\-version\fP"
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Output version information and exit.
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.SH SEE ALSO
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.B cache_dump(8)
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.B cache_check(8)
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.B cache_repair(8)
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.B cache_restore(8)
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.SH AUTHOR
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Joe Thornber <ejt@redhat.com>
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@ -77,17 +77,17 @@ namespace thin_provisioning {
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virtual int run(int argc, char **argv);
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};
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#ifdef DEV_TOOLS
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class thin_scan_cmd : public base::command {
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class thin_trim_cmd : public base::command {
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public:
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thin_scan_cmd();
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thin_trim_cmd();
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virtual void usage(std::ostream &out) const;
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virtual int run(int argc, char **argv);
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};
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class thin_trim_cmd : public base::command {
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#ifdef DEV_TOOLS
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class thin_scan_cmd : public base::command {
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public:
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thin_trim_cmd();
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thin_scan_cmd();
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virtual void usage(std::ostream &out) const;
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virtual int run(int argc, char **argv);
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};
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