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rbd.cc
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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2004-2012 Sage Weil <[email protected]> and others
*
* LGPL2. See file COPYING.
*
*/
#include "mon/MonClient.h"
#include "mon/MonMap.h"
#include "common/config.h"
#include "auth/KeyRing.h"
#include "common/errno.h"
#include "common/ceph_argparse.h"
#include "common/strtol.h"
#include "global/global_init.h"
#include "common/safe_io.h"
#include "common/secret.h"
#include "include/stringify.h"
#include "include/rados/librados.hpp"
#include "include/rbd/librbd.hpp"
#include "include/byteorder.h"
#include "include/intarith.h"
#include "include/compat.h"
#include "common/blkdev.h"
#include <boost/scoped_ptr.hpp>
#include <dirent.h>
#include <errno.h>
#include <inttypes.h>
#include <iostream>
#include <memory>
#include <sstream>
#include <stdlib.h>
#include <sys/types.h>
#include <time.h>
#include <tr1/memory>
#include <sys/ioctl.h>
#include "include/rbd_types.h"
#include "common/TextTable.h"
#include "include/util.h"
#include "common/Formatter.h"
#if defined(__linux__)
#include <linux/fs.h>
#endif
#if defined(__FreeBSD__)
#include <sys/param.h>
#endif
#define MAX_SECRET_LEN 1000
#define MAX_POOL_NAME_SIZE 128
#define RBD_DIFF_BANNER "rbd diff v1\n"
static string dir_oid = RBD_DIRECTORY;
static string dir_info_oid = RBD_INFO;
bool udevadm_settle = true;
bool progress = true;
bool resize_allow_shrink = false;
#define dout_subsys ceph_subsys_rbd
void usage()
{
cout <<
"usage: rbd [-n <auth user>] [OPTIONS] <cmd> ...\n"
"where 'pool' is a rados pool name (default is 'rbd') and 'cmd' is one of:\n"
" (ls | list) [-l | --long ] [pool-name] list rbd images\n"
" (-l includes snapshots/clones)\n"
" info <image-name> show information about image size,\n"
" striping, etc.\n"
" create [--order <bits>] --size <MB> <name> create an empty image\n"
" clone [--order <bits>] <parentsnap> <clonename>\n"
" clone a snapshot into a COW\n"
" child image\n"
" children <snap-name> display children of snapshot\n"
" flatten <image-name> fill clone with parent data\n"
" (make it independent)\n"
" resize --size <MB> <image-name> resize (expand or contract) image\n"
" rm <image-name> delete an image\n"
" export <image-name> <path> export image to file\n"
" \"-\" for stdout\n"
" import <path> <image-name> import image from file\n"
" (dest defaults\n"
" as the filename part of file)\n"
" \"-\" for stdin\n"
" diff <image-name> [--from-snap <snap-name>] print extents that differ since\n"
" a previous snap, or image creation\n"
" export-diff <image-name> [--from-snap <snap-name>] <path>\n"
" export an incremental diff to\n"
" path, or \"-\" for stdout\n"
" import-diff <path> <image-name> import an incremental diff from\n"
" path or \"-\" for stdin\n"
" (cp | copy) <src> <dest> copy src image to dest\n"
" (mv | rename) <src> <dest> rename src image to dest\n"
" snap ls <image-name> dump list of image snapshots\n"
" snap create <snap-name> create a snapshot\n"
" snap rollback <snap-name> rollback image to snapshot\n"
" snap rm <snap-name> deletes a snapshot\n"
" snap purge <image-name> deletes all snapshots\n"
" snap protect <snap-name> prevent a snapshot from being deleted\n"
" snap unprotect <snap-name> allow a snapshot to be deleted\n"
" watch <image-name> watch events on image\n"
" map <image-name> map image to a block device\n"
" using the kernel\n"
" unmap <device> unmap a rbd device that was\n"
" mapped by the kernel\n"
" showmapped show the rbd images mapped\n"
" by the kernel\n"
" lock list <image-name> show locks held on an image\n"
" lock add <image-name> <id> [--shared <tag>] take a lock called id on an image\n"
" lock remove <image-name> <id> <locker> release a lock on an image\n"
" bench-write <image-name> simple write benchmark\n"
" --io-size <bytes> write size\n"
" --io-threads <num> ios in flight\n"
" --io-total <bytes> total bytes to write\n"
" --io-pattern <seq|rand> write pattern\n"
"\n"
"<image-name>, <snap-name> are [pool/]name[@snap], or you may specify\n"
"individual pieces of names with -p/--pool, --image, and/or --snap.\n"
"\n"
"Other input options:\n"
" -p, --pool <pool> source pool name\n"
" --image <image-name> image name\n"
" --dest <image-name> destination [pool and] image name\n"
" --snap <snap-name> snapshot name\n"
" --dest-pool <name> destination pool name\n"
" --path <path-name> path name for import/export\n"
" --size <size in MB> size of image for create and resize\n"
" --order <bits> the object size in bits; object size will be\n"
" (1 << order) bytes. Default is 22 (4 MB).\n"
" --image-format <format-number> format to use when creating an image\n"
" format 1 is the original format (default)\n"
" format 2 supports cloning\n"
" --id <username> rados user (without 'client.'prefix) to\n"
" authenticate as\n"
" --keyfile <path> file containing secret key for use with cephx\n"
" --shared <tag> take a shared (rather than exclusive) lock\n"
" --format <output-format> output format (default: plain, json, xml)\n"
" --pretty-format make json or xml output more readable\n"
" --no-settle do not wait for udevadm to settle on map/unmap\n"
" --no-progress do not show progress for long-running commands\n"
" --allow-shrink allow shrinking of an image when resizing\n";
}
static string feature_str(uint64_t feature)
{
switch (feature) {
case RBD_FEATURE_LAYERING:
return "layering";
case RBD_FEATURE_STRIPINGV2:
return "striping";
default:
return "";
}
}
static string features_str(uint64_t features)
{
string s = "";
for (uint64_t feature = 1; feature <= RBD_FEATURE_STRIPINGV2;
feature <<= 1) {
if (feature & features) {
if (s.size())
s += ", ";
s += feature_str(feature);
}
}
return s;
}
static void format_features(Formatter *f, uint64_t features)
{
f->open_array_section("features");
for (uint64_t feature = 1; feature <= RBD_FEATURE_STRIPINGV2;
feature <<= 1) {
f->dump_string("feature", feature_str(feature));
}
f->close_section();
}
struct MyProgressContext : public librbd::ProgressContext {
const char *operation;
int last_pc;
MyProgressContext(const char *o) : operation(o), last_pc(0) {
}
int update_progress(uint64_t offset, uint64_t total) {
if (progress) {
int pc = total ? (offset * 100ull / total) : 0;
if (pc != last_pc) {
cerr << "\r" << operation << ": "
// << offset << " / " << total << " "
<< pc << "% complete...";
cerr.flush();
last_pc = pc;
}
}
return 0;
}
void finish() {
if (progress) {
cerr << "\r" << operation << ": 100% complete...done." << std::endl;
}
}
void fail() {
if (progress) {
cerr << "\r" << operation << ": " << last_pc << "% complete...failed."
<< std::endl;
}
}
};
static int get_outfmt(const char *output_format,
bool pretty,
boost::scoped_ptr<Formatter> *f)
{
if (!strcmp(output_format, "json")) {
f->reset(new JSONFormatter(pretty));
} else if (!strcmp(output_format, "xml")) {
f->reset(new XMLFormatter(pretty));
} else if (strcmp(output_format, "plain")) {
cerr << "rbd: unknown format '" << output_format << "'" << std::endl;
return -EINVAL;
}
return 0;
}
static int do_list(librbd::RBD &rbd, librados::IoCtx& io_ctx, bool lflag,
Formatter *f)
{
std::vector<string> names;
int r = rbd.list(io_ctx, names);
if (r < 0)
return r;
if (!lflag) {
if (f)
f->open_array_section("images");
for (std::vector<string>::const_iterator i = names.begin();
i != names.end(); ++i) {
if (f)
f->dump_string("name", *i);
else
cout << *i << std::endl;
}
if (f) {
f->close_section();
f->flush(cout);
}
return 0;
}
TextTable tbl;
if (f) {
f->open_array_section("images");
} else {
tbl.define_column("NAME", TextTable::LEFT, TextTable::LEFT);
tbl.define_column("SIZE", TextTable::RIGHT, TextTable::RIGHT);
tbl.define_column("PARENT", TextTable::LEFT, TextTable::LEFT);
tbl.define_column("FMT", TextTable::RIGHT, TextTable::RIGHT);
tbl.define_column("PROT", TextTable::LEFT, TextTable::LEFT);
tbl.define_column("LOCK", TextTable::LEFT, TextTable::LEFT);
}
string pool, image, snap, parent;
for (std::vector<string>::const_iterator i = names.begin();
i != names.end(); ++i) {
librbd::image_info_t info;
librbd::Image im;
r = rbd.open_read_only(io_ctx, im, i->c_str(), NULL);
// image might disappear between rbd.list() and rbd.open(); ignore
// that, warn about other possible errors (EPERM, say, for opening
// an old-format image, because you need execute permission for the
// class method)
if (r < 0) {
if (r != -ENOENT) {
cerr << "rbd: error opening " << *i << ": " << cpp_strerror(r)
<< std::endl;
}
// in any event, continue to next image
continue;
}
// handle second-nth trips through loop
parent.clear();
r = im.parent_info(&pool, &image, &snap);
if (r < 0 && r != -ENOENT)
return r;
bool has_parent = false;
if (r != -ENOENT) {
parent = pool + "/" + image + "@" + snap;
has_parent = true;
}
if (im.stat(info, sizeof(info)) < 0)
return -EINVAL;
uint8_t old_format;
im.old_format(&old_format);
list<librbd::locker_t> lockers;
bool exclusive;
r = im.list_lockers(&lockers, &exclusive, NULL);
if (r < 0)
return r;
string lockstr;
if (!lockers.empty()) {
lockstr = (exclusive) ? "excl" : "shr";
}
if (f) {
f->open_object_section("image");
f->dump_string("image", *i);
f->dump_unsigned("size", info.size);
if (has_parent) {
f->open_object_section("parent");
f->dump_string("pool", pool);
f->dump_string("image", image);
f->dump_string("snapshot", snap);
f->close_section();
}
f->dump_int("format", old_format ? 1 : 2);
if (!lockers.empty())
f->dump_string("lock_type", exclusive ? "exclusive" : "shared");
f->close_section();
} else {
tbl << *i
<< stringify(si_t(info.size))
<< parent
<< ((old_format) ? '1' : '2')
<< "" // protect doesn't apply to images
<< lockstr
<< TextTable::endrow;
}
vector<librbd::snap_info_t> snaplist;
if (im.snap_list(snaplist) >= 0 && !snaplist.empty()) {
for (std::vector<librbd::snap_info_t>::iterator s = snaplist.begin();
s != snaplist.end(); ++s) {
bool is_protected;
bool has_parent = false;
parent.clear();
im.snap_set(s->name.c_str());
r = im.snap_is_protected(s->name.c_str(), &is_protected);
if (r < 0)
return r;
if (im.parent_info(&pool, &image, &snap) >= 0) {
parent = pool + "/" + image + "@" + snap;
has_parent = true;
}
if (f) {
f->open_object_section("snapshot");
f->dump_string("image", *i);
f->dump_string("snapshot", s->name);
f->dump_unsigned("size", s->size);
if (has_parent) {
f->open_object_section("parent");
f->dump_string("pool", pool);
f->dump_string("image", image);
f->dump_string("snapshot", snap);
f->close_section();
}
f->dump_int("format", old_format ? 1 : 2);
f->dump_string("protected", is_protected ? "true" : "false");
f->close_section();
} else {
tbl << *i + "@" + s->name
<< stringify(si_t(s->size))
<< parent
<< ((old_format) ? '1' : '2')
<< (is_protected ? "yes" : "")
<< "" // locks don't apply to snaps
<< TextTable::endrow;
}
}
}
}
if (f) {
f->close_section();
f->flush(cout);
} else if (!names.empty()) {
cout << tbl;
}
return 0;
}
static int do_create(librbd::RBD &rbd, librados::IoCtx& io_ctx,
const char *imgname, uint64_t size, int *order,
int format, uint64_t features,
uint64_t stripe_unit, uint64_t stripe_count)
{
int r;
if (format == 1) {
// weird striping not allowed with format 1!
if ((stripe_unit || stripe_count) &&
(stripe_unit != (1ull << *order) && stripe_count != 1)) {
cerr << "non-default striping not allowed with format 1; use --format 2"
<< std::endl;
return -EINVAL;
}
r = rbd.create(io_ctx, imgname, size, order);
} else {
if (features == 0) {
features = RBD_FEATURE_LAYERING;
}
if ((stripe_unit || stripe_count) &&
(stripe_unit != (1ull << *order) && stripe_count != 1)) {
features |= RBD_FEATURE_STRIPINGV2;
}
r = rbd.create3(io_ctx, imgname, size, features, order,
stripe_unit, stripe_count);
}
if (r < 0)
return r;
return 0;
}
static int do_clone(librbd::RBD &rbd, librados::IoCtx &p_ioctx,
const char *p_name, const char *p_snapname,
librados::IoCtx &c_ioctx, const char *c_name,
uint64_t features, int *c_order)
{
if (features == 0)
features = RBD_FEATURES_ALL;
else if ((features & RBD_FEATURE_LAYERING) != RBD_FEATURE_LAYERING)
return -EINVAL;
return rbd.clone(p_ioctx, p_name, p_snapname, c_ioctx, c_name, features,
c_order);
}
static int do_flatten(librbd::Image& image)
{
MyProgressContext pc("Image flatten");
int r = image.flatten_with_progress(pc);
if (r < 0) {
pc.fail();
return r;
}
pc.finish();
return 0;
}
static int do_rename(librbd::RBD &rbd, librados::IoCtx& io_ctx,
const char *imgname, const char *destname)
{
int r = rbd.rename(io_ctx, imgname, destname);
if (r < 0)
return r;
return 0;
}
static int do_show_info(const char *imgname, librbd::Image& image,
const char *snapname, Formatter *f)
{
librbd::image_info_t info;
string parent_pool, parent_name, parent_snapname;
uint8_t old_format;
uint64_t overlap, features;
bool snap_protected;
int r;
r = image.stat(info, sizeof(info));
if (r < 0)
return r;
r = image.old_format(&old_format);
if (r < 0)
return r;
r = image.overlap(&overlap);
if (r < 0)
return r;
r = image.features(&features);
if (r < 0)
return r;
if (snapname) {
r = image.snap_is_protected(snapname, &snap_protected);
if (r < 0)
return r;
}
if (f) {
f->open_object_section("image");
f->dump_string("name", imgname);
f->dump_unsigned("size", info.size);
f->dump_unsigned("objects", info.num_objs);
f->dump_int("order", info.order);
f->dump_unsigned("object_size", info.obj_size);
f->dump_string("block_name_prefix", info.block_name_prefix);
f->dump_int("format", (old_format ? 1 : 2));
} else {
cout << "rbd image '" << imgname << "':\n"
<< "\tsize " << prettybyte_t(info.size) << " in "
<< info.num_objs << " objects"
<< std::endl
<< "\torder " << info.order
<< " (" << prettybyte_t(info.obj_size) << " objects)"
<< std::endl
<< "\tblock_name_prefix: " << info.block_name_prefix
<< std::endl
<< "\tformat: " << (old_format ? "1" : "2")
<< std::endl;
}
if (!old_format) {
if (f)
format_features(f, features);
else
cout << "\tfeatures: " << features_str(features) << std::endl;
}
// snapshot info, if present
if (snapname) {
if (f) {
f->dump_string("protected", snap_protected ? "true" : "false");
} else {
cout << "\tprotected: " << (snap_protected ? "True" : "False")
<< std::endl;
}
}
// parent info, if present
if ((image.parent_info(&parent_pool, &parent_name, &parent_snapname) == 0) &&
parent_name.length() > 0) {
if (f) {
f->open_object_section("parent");
f->dump_string("pool", parent_pool);
f->dump_string("image", parent_name);
f->dump_string("snapshot", parent_snapname);
f->dump_unsigned("overlap", overlap);
f->close_section();
} else {
cout << "\tparent: " << parent_pool << "/" << parent_name
<< "@" << parent_snapname << std::endl;
cout << "\toverlap: " << prettybyte_t(overlap) << std::endl;
}
}
// striping info, if feature is set
if (features & RBD_FEATURE_STRIPINGV2) {
if (f) {
f->dump_unsigned("stripe_unit", image.get_stripe_unit());
f->dump_unsigned("stripe_count", image.get_stripe_count());
} else {
cout << "\tstripe unit: " << prettybyte_t(image.get_stripe_unit())
<< std::endl
<< "\tstripe count: " << image.get_stripe_count() << std::endl;
}
}
if (f) {
f->close_section();
f->flush(cout);
}
return 0;
}
static int do_delete(librbd::RBD &rbd, librados::IoCtx& io_ctx,
const char *imgname)
{
MyProgressContext pc("Removing image");
int r = rbd.remove_with_progress(io_ctx, imgname, pc);
if (r < 0) {
pc.fail();
return r;
}
pc.finish();
return 0;
}
static int do_resize(librbd::Image& image, uint64_t size)
{
MyProgressContext pc("Resizing image");
int r = image.resize_with_progress(size, pc);
if (r < 0) {
pc.fail();
return r;
}
pc.finish();
return 0;
}
static int do_list_snaps(librbd::Image& image, Formatter *f)
{
std::vector<librbd::snap_info_t> snaps;
TextTable t;
int r;
r = image.snap_list(snaps);
if (r < 0)
return r;
if (f) {
f->open_array_section("snapshots");
} else {
t.define_column("SNAPID", TextTable::RIGHT, TextTable::RIGHT);
t.define_column("NAME", TextTable::LEFT, TextTable::LEFT);
t.define_column("SIZE", TextTable::RIGHT, TextTable::RIGHT);
}
for (std::vector<librbd::snap_info_t>::iterator s = snaps.begin();
s != snaps.end(); ++s) {
if (f) {
f->open_object_section("snapshot");
f->dump_unsigned("id", s->id);
f->dump_string("name", s->name);
f->dump_unsigned("size", s->size);
f->close_section();
} else {
t << s->id << s->name << stringify(prettybyte_t(s->size))
<< TextTable::endrow;
}
}
if (f) {
f->close_section();
f->flush(cout);
} else if (snaps.size()) {
cout << t;
}
return 0;
}
static int do_add_snap(librbd::Image& image, const char *snapname)
{
int r = image.snap_create(snapname);
if (r < 0)
return r;
return 0;
}
static int do_remove_snap(librbd::Image& image, const char *snapname)
{
int r = image.snap_remove(snapname);
if (r < 0)
return r;
return 0;
}
static int do_rollback_snap(librbd::Image& image, const char *snapname)
{
MyProgressContext pc("Rolling back to snapshot");
int r = image.snap_rollback_with_progress(snapname, pc);
if (r < 0) {
pc.fail();
return r;
}
pc.finish();
return 0;
}
static int do_purge_snaps(librbd::Image& image)
{
MyProgressContext pc("Removing all snapshots");
std::vector<librbd::snap_info_t> snaps;
int r = image.snap_list(snaps);
if (r < 0) {
pc.fail();
return r;
}
for (size_t i = 0; i < snaps.size(); ++i) {
r = image.snap_remove(snaps[i].name.c_str());
if (r < 0) {
pc.fail();
return r;
}
pc.update_progress(i + 1, snaps.size());
}
pc.finish();
return 0;
}
static int do_protect_snap(librbd::Image& image, const char *snapname)
{
int r = image.snap_protect(snapname);
if (r < 0)
return r;
return 0;
}
static int do_unprotect_snap(librbd::Image& image, const char *snapname)
{
int r = image.snap_unprotect(snapname);
if (r < 0)
return r;
return 0;
}
static int do_list_children(librbd::Image &image, Formatter *f)
{
set<pair<string, string> > children;
int r;
r = image.list_children(&children);
if (r < 0)
return r;
if (f)
f->open_array_section("children");
for (set<pair<string, string> >::const_iterator child_it = children.begin();
child_it != children.end(); child_it++) {
if (f) {
f->open_object_section("child");
f->dump_string("pool", child_it->first);
f->dump_string("image", child_it->second);
f->close_section();
} else {
cout << child_it->first << "/" << child_it->second << std::endl;
}
}
if (f) {
f->close_section();
f->flush(cout);
}
return 0;
}
static int do_lock_list(librbd::Image& image, Formatter *f)
{
list<librbd::locker_t> lockers;
bool exclusive;
string tag;
TextTable tbl;
int r;
r = image.list_lockers(&lockers, &exclusive, &tag);
if (r < 0)
return r;
if (f) {
f->open_object_section("locks");
} else {
tbl.define_column("Locker", TextTable::LEFT, TextTable::LEFT);
tbl.define_column("ID", TextTable::LEFT, TextTable::LEFT);
tbl.define_column("Address", TextTable::LEFT, TextTable::LEFT);
}
if (lockers.size()) {
bool one = (lockers.size() == 1);
if (!f) {
cout << "There " << (one ? "is " : "are ") << lockers.size()
<< (exclusive ? " exclusive" : " shared")
<< " lock" << (one ? "" : "s") << " on this image.\n";
if (!exclusive)
cout << "Lock tag: " << tag << "\n";
}
for (list<librbd::locker_t>::const_iterator it = lockers.begin();
it != lockers.end(); ++it) {
if (f) {
f->open_object_section(it->cookie.c_str());
f->dump_string("locker", it->client);
f->dump_string("address", it->address);
f->close_section();
} else {
tbl << it->client << it->cookie << it->address << TextTable::endrow;
}
}
if (!f)
cout << tbl;
}
if (f) {
f->close_section();
f->flush(cout);
}
return 0;
}
static int do_lock_add(librbd::Image& image, const char *cookie,
const char *tag)
{
if (tag)
return image.lock_shared(cookie, tag);
else
return image.lock_exclusive(cookie);
}
static int do_lock_remove(librbd::Image& image, const char *client,
const char *cookie)
{
return image.break_lock(client, cookie);
}
static void rbd_bencher_completion(void *c, void *pc);
struct rbd_bencher;
struct rbd_bencher {
librbd::Image *image;
Mutex lock;
Cond cond;
int in_flight;
rbd_bencher(librbd::Image *i)
: image(i),
lock("rbd_bencher::lock"),
in_flight(0)
{ }
bool start_write(int max, uint64_t off, uint64_t len, bufferlist& bl)
{
{
Mutex::Locker l(lock);
if (in_flight >= max)
return false;
in_flight++;
}
librbd::RBD::AioCompletion *c =
new librbd::RBD::AioCompletion((void *)this, rbd_bencher_completion);
image->aio_write(off, len, bl, c);
//cout << "start " << c << " at " << off << "~" << len << std::endl;
return true;
}
void wait_for(int max) {
Mutex::Locker l(lock);
while (in_flight > max) {
utime_t dur;
dur.set_from_double(.2);
cond.WaitInterval(g_ceph_context, lock, dur);
}
}
};
void rbd_bencher_completion(void *vc, void *pc)
{
librbd::RBD::AioCompletion *c = (librbd::RBD::AioCompletion *)vc;
rbd_bencher *b = static_cast<rbd_bencher *>(pc);
//cout << "complete " << c << std::endl;
b->lock.Lock();
b->in_flight--;
b->cond.Signal();
b->lock.Unlock();
c->release();
}
static int do_bench_write(librbd::Image& image, uint64_t io_size,
uint64_t io_threads, uint64_t io_bytes,
string pattern)
{
rbd_bencher b(&image);
cout << "bench-write "
<< " io_size " << io_size
<< " io_threads " << io_threads
<< " bytes " << io_bytes
<< " pattern " << pattern
<< std::endl;
if (pattern != "rand" && pattern != "seq")
return -EINVAL;
srand(time(NULL) % (unsigned long) -1);
bufferptr bp(io_size);
memset(bp.c_str(), rand() & 0xff, io_size);
bufferlist bl;
bl.push_back(bp);
utime_t start = ceph_clock_now(NULL);
utime_t last;
unsigned ios = 0;
uint64_t size = 0;
image.size(&size);
printf(" SEC OPS OPS/SEC BYTES/SEC\n");
uint64_t off;
for (off = 0; off < io_bytes; off += io_size) {
b.wait_for(io_threads - 1);
uint64_t i = 0;
uint64_t real_off = off;
if (pattern == "rand") {
real_off = (rand() % (size / io_size)) * io_size;
}
while (i < io_threads &&
b.start_write(io_threads, real_off, io_size, bl)) {
++i;
++ios;
}
utime_t now = ceph_clock_now(NULL);
utime_t elapsed = now - start;
if (elapsed.sec() != last.sec()) {
printf("%5d %8d %8.2lf %8.2lf\n",
(int)elapsed,
(int)(ios - io_threads),
(double)(ios - io_threads) / elapsed,
(double)(off - io_threads * io_size) / elapsed);
last = elapsed;
}
}
b.wait_for(0);
int r = image.flush();
if (r < 0) {
cerr << "Error flushing data at the end: " << cpp_strerror(r) << std::endl;
}
utime_t now = ceph_clock_now(NULL);
double elapsed = now - start;
printf("elapsed: %5d ops: %8d ops/sec: %8.2lf bytes/sec: %8.2lf\n",
(int)elapsed, ios, (double)ios / elapsed, (double)off / elapsed);
return 0;
}
struct ExportContext {
librbd::Image *image;
int fd;
uint64_t totalsize;
MyProgressContext pc;
ExportContext(librbd::Image *i, int f, uint64_t t) :
image(i),
fd(f),
totalsize(t),
pc("Exporting image")
{}
};
static int export_read_cb(uint64_t ofs, size_t len, const char *buf, void *arg)
{
ssize_t ret;
ExportContext *ec = static_cast<ExportContext *>(arg);
int fd = ec->fd;
static char *localbuf = NULL;
static size_t maplen = 0;
if (fd == 1) {
if (!buf) {
// can't seek stdout; need actual data to write
if (maplen < len) {
// never mapped, or need to map larger
int r;
if (localbuf != NULL){
if ((r = munmap(localbuf, len)) < 0) {
cerr << "rbd: error " << r << "munmap'ing buffer" << std::endl;
return errno;
}
}
maplen = len;
localbuf = (char *)mmap(NULL, maplen, PROT_READ,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
if (localbuf == MAP_FAILED) {
cerr << "rbd: MAP_FAILED mmap'ing buffer for zero writes"
<< std::endl;
return -ENOMEM;
}
}
ret = write(fd, localbuf, len);
} else {
ret = write(fd, buf, len);
}
} else { // not stdout
if (!buf || buf_is_zero(buf, len)) {
/* a hole */
return 0;
}
ret = lseek64(fd, ofs, SEEK_SET);