/
librbd.cc
1811 lines (1618 loc) · 62.1 KB
/
librbd.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) 2011 New Dream Network
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#include "include/int_types.h"
#include <errno.h>
#include "common/Cond.h"
#include "common/dout.h"
#include "common/errno.h"
#include "common/snap_types.h"
#include "common/perf_counters.h"
#include "common/WorkQueue.h"
#include "include/Context.h"
#include "include/rbd/librbd.hpp"
#include "osdc/ObjectCacher.h"
#include "librbd/AioCompletion.h"
#include "cls/rbd/cls_rbd_client.h"
#include "librbd/ImageCtx.h"
#include "librbd/internal.h"
#include "librbd/LibrbdWriteback.h"
#include <algorithm>
#include <string>
#include <vector>
#ifdef WITH_LTTNG
#include "tracing/librbd.h"
#else
#define tracepoint(...)
#endif
#define dout_subsys ceph_subsys_rbd
#undef dout_prefix
#define dout_prefix *_dout << "librbd: "
using std::string;
using std::vector;
using ceph::bufferlist;
using librados::snap_t;
using librados::IoCtx;
namespace {
class C_AioReadWQ : public Context {
public:
C_AioReadWQ(librbd::ImageCtx *ictx, uint64_t off, size_t len,
char *buf, bufferlist *pbl, librbd::AioCompletion *c,
int op_flags)
: m_ictx(ictx), m_off(off), m_len(len), m_buf(buf), m_pbl(pbl), m_comp(c),
m_op_flags(op_flags) {
}
protected:
virtual void finish(int r) {
librbd::aio_read(m_ictx, m_off, m_len, m_buf, m_pbl, m_comp, m_op_flags);
}
private:
librbd::ImageCtx *m_ictx;
uint64_t m_off;
uint64_t m_len;
char *m_buf;
bufferlist *m_pbl;
librbd::AioCompletion *m_comp;
int m_op_flags;
};
class C_AioWriteWQ : public Context {
public:
C_AioWriteWQ(librbd::ImageCtx *ictx, uint64_t off, size_t len,
const char *buf, librbd::AioCompletion *c, int op_flags)
: m_ictx(ictx), m_off(off), m_len(len), m_buf(buf), m_comp(c),
m_op_flags(op_flags) {
}
protected:
virtual void finish(int r) {
aio_write(m_ictx, m_off, m_len, m_buf, m_comp, m_op_flags);
}
private:
librbd::ImageCtx *m_ictx;
uint64_t m_off;
uint64_t m_len;
const char *m_buf;
librbd::AioCompletion *m_comp;
int m_op_flags;
};
class C_AioDiscardWQ : public Context {
public:
C_AioDiscardWQ(librbd::ImageCtx *ictx, uint64_t off, uint64_t len,
librbd::AioCompletion *c)
: m_ictx(ictx), m_off(off), m_len(len), m_comp(c) {
}
protected:
virtual void finish(int r) {
aio_discard(m_ictx, m_off, m_len, m_comp);
}
private:
librbd::ImageCtx *m_ictx;
uint64_t m_off;
uint64_t m_len;
librbd::AioCompletion *m_comp;
};
class C_AioFlushWQ : public Context {
public:
C_AioFlushWQ(librbd::ImageCtx *ictx, librbd::AioCompletion *c)
: m_ictx(ictx), m_comp(c) {
}
protected:
virtual void finish(int r) {
aio_flush(m_ictx, m_comp);
}
private:
librbd::ImageCtx *m_ictx;
librbd::AioCompletion *m_comp;
};
librbd::AioCompletion* get_aio_completion(librbd::RBD::AioCompletion *comp) {
return reinterpret_cast<librbd::AioCompletion *>(comp->pc);
}
} // anonymous namespace
namespace librbd {
ProgressContext::~ProgressContext()
{
}
class CProgressContext : public ProgressContext
{
public:
CProgressContext(librbd_progress_fn_t fn, void *data)
: m_fn(fn), m_data(data)
{
}
int update_progress(uint64_t offset, uint64_t src_size)
{
return m_fn(offset, src_size, m_data);
}
private:
librbd_progress_fn_t m_fn;
void *m_data;
};
/*
RBD
*/
RBD::RBD()
{
}
RBD::~RBD()
{
}
void RBD::version(int *major, int *minor, int *extra)
{
rbd_version(major, minor, extra);
}
int RBD::open(IoCtx& io_ctx, Image& image, const char *name)
{
return open(io_ctx, image, name, NULL);
}
int RBD::open(IoCtx& io_ctx, Image& image, const char *name,
const char *snap_name)
{
ImageCtx *ictx = new ImageCtx(name, "", snap_name, io_ctx, false);
tracepoint(librbd, open_image_enter, ictx, ictx->name.c_str(), ictx->id.c_str(), ictx->snap_name.c_str(), ictx->read_only);
int r = librbd::open_image(ictx);
if (r < 0) {
tracepoint(librbd, open_image_exit, r);
return r;
}
image.ctx = (image_ctx_t) ictx;
tracepoint(librbd, open_image_exit, 0);
return 0;
}
int RBD::open_read_only(IoCtx& io_ctx, Image& image, const char *name,
const char *snap_name)
{
ImageCtx *ictx = new ImageCtx(name, "", snap_name, io_ctx, true);
tracepoint(librbd, open_image_enter, ictx, ictx->name.c_str(), ictx->id.c_str(), ictx->snap_name.c_str(), ictx->read_only);
int r = librbd::open_image(ictx);
if (r < 0) {
tracepoint(librbd, open_image_exit, r);
return r;
}
image.ctx = (image_ctx_t) ictx;
tracepoint(librbd, open_image_exit, 0);
return 0;
}
int RBD::create(IoCtx& io_ctx, const char *name, uint64_t size, int *order)
{
tracepoint(librbd, create_enter, io_ctx.get_pool_name().c_str(), io_ctx.get_id(), name, size, *order);
int r = librbd::create(io_ctx, name, size, order);
tracepoint(librbd, create_exit, r, *order);
return r;
}
int RBD::create2(IoCtx& io_ctx, const char *name, uint64_t size,
uint64_t features, int *order)
{
tracepoint(librbd, create2_enter, io_ctx.get_pool_name().c_str(), io_ctx.get_id(), name, size, features, *order);
int r = librbd::create(io_ctx, name, size, false, features, order, 0, 0);
tracepoint(librbd, create2_exit, r, *order);
return r;
}
int RBD::create3(IoCtx& io_ctx, const char *name, uint64_t size,
uint64_t features, int *order, uint64_t stripe_unit,
uint64_t stripe_count)
{
tracepoint(librbd, create3_enter, io_ctx.get_pool_name().c_str(), io_ctx.get_id(), name, size, features, *order, stripe_unit, stripe_count);
int r = librbd::create(io_ctx, name, size, false, features, order,
stripe_unit, stripe_count);
tracepoint(librbd, create3_exit, r, *order);
return r;
}
int RBD::clone(IoCtx& p_ioctx, const char *p_name, const char *p_snap_name,
IoCtx& c_ioctx, const char *c_name, uint64_t features,
int *c_order)
{
tracepoint(librbd, clone_enter, p_ioctx.get_pool_name().c_str(), p_ioctx.get_id(), p_name, p_snap_name, c_ioctx.get_pool_name().c_str(), c_ioctx.get_id(), c_name, features);
int r = librbd::clone(p_ioctx, p_name, p_snap_name, c_ioctx, c_name,
features, c_order, 0, 0);
tracepoint(librbd, clone_exit, r, *c_order);
return r;
}
int RBD::clone2(IoCtx& p_ioctx, const char *p_name, const char *p_snap_name,
IoCtx& c_ioctx, const char *c_name, uint64_t features,
int *c_order, uint64_t stripe_unit, int stripe_count)
{
tracepoint(librbd, clone2_enter, p_ioctx.get_pool_name().c_str(), p_ioctx.get_id(), p_name, p_snap_name, c_ioctx.get_pool_name().c_str(), c_ioctx.get_id(), c_name, features, stripe_unit, stripe_count);
int r = librbd::clone(p_ioctx, p_name, p_snap_name, c_ioctx, c_name,
features, c_order, stripe_unit, stripe_count);
tracepoint(librbd, clone_exit, r, *c_order);
return r;
}
int RBD::remove(IoCtx& io_ctx, const char *name)
{
tracepoint(librbd, remove_enter, io_ctx.get_pool_name().c_str(), io_ctx.get_id(), name);
librbd::NoOpProgressContext prog_ctx;
int r = librbd::remove(io_ctx, name, prog_ctx);
tracepoint(librbd, remove_exit, r);
return r;
}
int RBD::remove_with_progress(IoCtx& io_ctx, const char *name,
ProgressContext& pctx)
{
tracepoint(librbd, remove_enter, io_ctx.get_pool_name().c_str(), io_ctx.get_id(), name);
int r = librbd::remove(io_ctx, name, pctx);
tracepoint(librbd, remove_exit, r);
return r;
}
int RBD::list(IoCtx& io_ctx, vector<string>& names)
{
tracepoint(librbd, list_enter, io_ctx.get_pool_name().c_str(), io_ctx.get_id());
int r = librbd::list(io_ctx, names);
if (r >= 0) {
for (vector<string>::iterator itr = names.begin(), end = names.end(); itr != end; ++itr) {
tracepoint(librbd, list_entry, itr->c_str());
}
}
tracepoint(librbd, list_exit, r, r);
return r;
}
int RBD::rename(IoCtx& src_io_ctx, const char *srcname, const char *destname)
{
tracepoint(librbd, rename_enter, src_io_ctx.get_pool_name().c_str(), src_io_ctx.get_id(), srcname, destname);
int r = librbd::rename(src_io_ctx, srcname, destname);
tracepoint(librbd, rename_exit, r);
return r;
}
RBD::AioCompletion::AioCompletion(void *cb_arg, callback_t complete_cb)
{
librbd::AioCompletion *c = librbd::aio_create_completion(cb_arg,
complete_cb);
pc = (void *)c;
c->rbd_comp = this;
}
bool RBD::AioCompletion::is_complete()
{
librbd::AioCompletion *c = (librbd::AioCompletion *)pc;
return c->is_complete();
}
int RBD::AioCompletion::wait_for_complete()
{
librbd::AioCompletion *c = (librbd::AioCompletion *)pc;
return c->wait_for_complete();
}
ssize_t RBD::AioCompletion::get_return_value()
{
librbd::AioCompletion *c = (librbd::AioCompletion *)pc;
return c->get_return_value();
}
void RBD::AioCompletion::release()
{
librbd::AioCompletion *c = (librbd::AioCompletion *)pc;
c->release();
delete this;
}
/*
Image
*/
Image::Image() : ctx(NULL)
{
}
Image::~Image()
{
if (ctx) {
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, close_image_enter, ictx, ictx->name.c_str(), ictx->id.c_str());
close_image(ictx);
tracepoint(librbd, close_image_exit);
}
}
int Image::resize(uint64_t size)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, resize_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, size);
librbd::NoOpProgressContext prog_ctx;
int r = librbd::resize(ictx, size, prog_ctx);
tracepoint(librbd, resize_exit, r);
return r;
}
int Image::resize_with_progress(uint64_t size, librbd::ProgressContext& pctx)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, resize_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, size);
int r = librbd::resize(ictx, size, pctx);
tracepoint(librbd, resize_exit, r);
return r;
}
int Image::stat(image_info_t& info, size_t infosize)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, stat_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only);
int r = librbd::info(ictx, info, infosize);
tracepoint(librbd, stat_exit, r, &info);
return r;
}
int Image::old_format(uint8_t *old)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, get_old_format_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only);
int r = librbd::get_old_format(ictx, old);
tracepoint(librbd, get_old_format_exit, r, *old);
return r;
}
int Image::size(uint64_t *size)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, get_size_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only);
int r = librbd::get_size(ictx, size);
tracepoint(librbd, get_size_exit, r, *size);
return r;
}
int Image::features(uint64_t *features)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, get_features_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only);
int r = librbd::get_features(ictx, features);
tracepoint(librbd, get_features_exit, r, *features);
return r;
}
uint64_t Image::get_stripe_unit() const
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, get_stripe_unit_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only);
uint64_t stripe_unit = ictx->get_stripe_unit();
tracepoint(librbd, get_stripe_unit_exit, 0, stripe_unit);
return stripe_unit;
}
uint64_t Image::get_stripe_count() const
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, get_stripe_count_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only);
uint64_t stripe_count = ictx->get_stripe_count();
tracepoint(librbd, get_stripe_count_exit, 0, stripe_count);
return stripe_count;
}
int Image::overlap(uint64_t *overlap)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, get_overlap_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only);
int r = librbd::get_overlap(ictx, overlap);
tracepoint(librbd, get_overlap_exit, r, *overlap);
return r;
}
int Image::parent_info(string *parent_pool_name, string *parent_name,
string *parent_snap_name)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, get_parent_info_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only);
int r = librbd::get_parent_info(ictx, parent_pool_name, parent_name,
parent_snap_name);
tracepoint(librbd, get_parent_info_exit, r, parent_pool_name ? parent_pool_name->c_str() : NULL, parent_name ? parent_name->c_str() : NULL, parent_snap_name ? parent_snap_name->c_str() : NULL);
return r;
}
int Image::get_flags(uint64_t *flags)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, get_flags_enter, ictx);
int r = librbd::get_flags(ictx, flags);
tracepoint(librbd, get_flags_exit, ictx, r, *flags);
return r;
}
int Image::is_exclusive_lock_owner(bool *is_owner)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, is_exclusive_lock_owner_enter, ictx);
int r = librbd::is_exclusive_lock_owner(ictx, is_owner);
tracepoint(librbd, is_exclusive_lock_owner_exit, ictx, r, *is_owner);
return r;
}
int Image::copy(IoCtx& dest_io_ctx, const char *destname)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, copy_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, dest_io_ctx.get_pool_name().c_str(), dest_io_ctx.get_id(), destname);
librbd::NoOpProgressContext prog_ctx;
int r = librbd::copy(ictx, dest_io_ctx, destname, prog_ctx);
tracepoint(librbd, copy_exit, r);
return r;
}
int Image::copy2(Image& dest)
{
ImageCtx *srcctx = (ImageCtx *)ctx;
ImageCtx *destctx = (ImageCtx *)dest.ctx;
tracepoint(librbd, copy2_enter, srcctx, srcctx->name.c_str(), srcctx->snap_name.c_str(), srcctx->read_only, destctx, destctx->name.c_str(), destctx->snap_name.c_str(), destctx->read_only);
librbd::NoOpProgressContext prog_ctx;
int r = librbd::copy(srcctx, destctx, prog_ctx);
tracepoint(librbd, copy2_exit, r);
return r;
}
int Image::copy_with_progress(IoCtx& dest_io_ctx, const char *destname,
librbd::ProgressContext &pctx)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, copy_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, dest_io_ctx.get_pool_name().c_str(), dest_io_ctx.get_id(), destname);
int r = librbd::copy(ictx, dest_io_ctx, destname, pctx);
tracepoint(librbd, copy_exit, r);
return r;
}
int Image::copy_with_progress2(Image& dest, librbd::ProgressContext &pctx)
{
ImageCtx *srcctx = (ImageCtx *)ctx;
ImageCtx *destctx = (ImageCtx *)dest.ctx;
tracepoint(librbd, copy2_enter, srcctx, srcctx->name.c_str(), srcctx->snap_name.c_str(), srcctx->read_only, destctx, destctx->name.c_str(), destctx->snap_name.c_str(), destctx->read_only);
int r = librbd::copy(srcctx, destctx, pctx);
tracepoint(librbd, copy2_exit, r);
return r;
}
int Image::flatten()
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, flatten_enter, ictx, ictx->name.c_str(), ictx->id.c_str());
librbd::NoOpProgressContext prog_ctx;
int r = librbd::flatten(ictx, prog_ctx);
tracepoint(librbd, flatten_exit, r);
return r;
}
int Image::flatten_with_progress(librbd::ProgressContext& prog_ctx)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, flatten_enter, ictx, ictx->name.c_str(), ictx->id.c_str());
int r = librbd::flatten(ictx, prog_ctx);
tracepoint(librbd, flatten_exit, r);
return r;
}
int Image::list_children(set<pair<string, string> > *children)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, list_children_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only);
int r = librbd::list_children(ictx, *children);
if (r >= 0) {
for (set<pair<string, string> >::const_iterator it = children->begin();
it != children->end(); ++it) {
tracepoint(librbd, list_children_entry, it->first.c_str(), it->second.c_str());
}
}
tracepoint(librbd, list_children_exit, r);
return r;
}
int Image::list_lockers(std::list<librbd::locker_t> *lockers,
bool *exclusive, string *tag)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, list_lockers_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only);
int r = librbd::list_lockers(ictx, lockers, exclusive, tag);
if (r >= 0) {
for (std::list<librbd::locker_t>::const_iterator it = lockers->begin();
it != lockers->end(); ++it) {
tracepoint(librbd, list_lockers_entry, it->client.c_str(), it->cookie.c_str(), it->address.c_str());
}
}
tracepoint(librbd, list_lockers_exit, r);
return r;
}
int Image::lock_exclusive(const string& cookie)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, lock_exclusive_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, cookie.c_str());
int r = librbd::lock(ictx, true, cookie, "");
tracepoint(librbd, lock_exclusive_exit, r);
return r;
}
int Image::lock_shared(const string& cookie, const std::string& tag)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, lock_shared_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, cookie.c_str(), tag.c_str());
int r = librbd::lock(ictx, false, cookie, tag);
tracepoint(librbd, lock_shared_exit, r);
return r;
}
int Image::unlock(const string& cookie)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, unlock_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, cookie.c_str());
int r = librbd::unlock(ictx, cookie);
tracepoint(librbd, unlock_exit, r);
return r;
}
int Image::break_lock(const string& client, const string& cookie)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, break_lock_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, client.c_str(), cookie.c_str());
int r = librbd::break_lock(ictx, client, cookie);
tracepoint(librbd, break_lock_exit, r);
return r;
}
int Image::snap_create(const char *snap_name)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, snap_create_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, snap_name);
int r = librbd::snap_create(ictx, snap_name);
tracepoint(librbd, snap_create_exit, r);
return r;
}
int Image::snap_remove(const char *snap_name)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, snap_remove_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, snap_name);
int r = librbd::snap_remove(ictx, snap_name);
tracepoint(librbd, snap_remove_exit, r);
return r;
}
int Image::snap_rollback(const char *snap_name)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, snap_rollback_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, snap_name);
librbd::NoOpProgressContext prog_ctx;
int r = librbd::snap_rollback(ictx, snap_name, prog_ctx);
tracepoint(librbd, snap_rollback_exit, r);
return r;
}
int Image::snap_rollback_with_progress(const char *snap_name,
ProgressContext& prog_ctx)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, snap_rollback_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, snap_name);
int r = librbd::snap_rollback(ictx, snap_name, prog_ctx);
tracepoint(librbd, snap_rollback_exit, r);
return r;
}
int Image::snap_protect(const char *snap_name)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, snap_protect_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, snap_name);
int r = librbd::snap_protect(ictx, snap_name);
tracepoint(librbd, snap_protect_exit, r);
return r;
}
int Image::snap_unprotect(const char *snap_name)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, snap_unprotect_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, snap_name);
int r = librbd::snap_unprotect(ictx, snap_name);
tracepoint(librbd, snap_unprotect_exit, r);
return r;
}
int Image::snap_is_protected(const char *snap_name, bool *is_protected)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, snap_is_protected_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, snap_name);
int r = librbd::snap_is_protected(ictx, snap_name, is_protected);
tracepoint(librbd, snap_is_protected_exit, r, *is_protected ? 1 : 0);
return r;
}
int Image::snap_list(vector<librbd::snap_info_t>& snaps)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, snap_list_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, &snaps);
int r = librbd::snap_list(ictx, snaps);
if (r >= 0) {
for (int i = 0, n = snaps.size(); i < n; i++) {
tracepoint(librbd, snap_list_entry, snaps[i].id, snaps[i].size, snaps[i].name.c_str());
}
}
tracepoint(librbd, snap_list_exit, r, snaps.size());
if (r >= 0) {
// A little ugly, but the C++ API doesn't need a Image::snap_list_end,
// and we want the tracepoints to mirror the C API
tracepoint(librbd, snap_list_end_enter, &snaps);
tracepoint(librbd, snap_list_end_exit);
}
return r;
}
bool Image::snap_exists(const char *snap_name)
{
ImageCtx *ictx = (ImageCtx *)ctx;
return librbd::snap_exists(ictx, snap_name);
}
int Image::snap_set(const char *snap_name)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, snap_set_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, snap_name);
int r = librbd::snap_set(ictx, snap_name);
tracepoint(librbd, snap_set_exit, r);
return r;
}
ssize_t Image::read(uint64_t ofs, size_t len, bufferlist& bl)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, read_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, ofs, len);
bufferptr ptr(len);
bl.push_back(ptr);
int r = librbd::read(ictx, ofs, len, bl.c_str(), 0);
tracepoint(librbd, read_exit, r);
return r;
}
ssize_t Image::read2(uint64_t ofs, size_t len, bufferlist& bl, int op_flags)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, read2_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(),
ictx->read_only, ofs, len, op_flags);
bufferptr ptr(len);
bl.push_back(ptr);
int r = librbd::read(ictx, ofs, len, bl.c_str(), op_flags);
tracepoint(librbd, read_exit, r);
return r;
}
int64_t Image::read_iterate(uint64_t ofs, size_t len,
int (*cb)(uint64_t, size_t, const char *, void *),
void *arg)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, read_iterate_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, ofs, len);
int64_t r = librbd::read_iterate(ictx, ofs, len, cb, arg);
tracepoint(librbd, read_iterate_exit, r);
return r;
}
int Image::read_iterate2(uint64_t ofs, uint64_t len,
int (*cb)(uint64_t, size_t, const char *, void *),
void *arg)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, read_iterate2_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, ofs, len);
int64_t r = librbd::read_iterate(ictx, ofs, len, cb, arg);
if (r > 0)
r = 0;
tracepoint(librbd, read_iterate2_exit, r);
return (int)r;
}
int Image::diff_iterate(const char *fromsnapname,
uint64_t ofs, uint64_t len,
int (*cb)(uint64_t, size_t, int, void *),
void *arg)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, diff_iterate_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, fromsnapname, ofs, len);
int r = librbd::diff_iterate(ictx, fromsnapname, ofs, len, cb, arg);
tracepoint(librbd, diff_iterate_exit, r);
return r;
}
ssize_t Image::write(uint64_t ofs, size_t len, bufferlist& bl)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, write_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, ofs, len, bl.length() < len ? NULL : bl.c_str());
if (bl.length() < len) {
tracepoint(librbd, write_exit, -EINVAL);
return -EINVAL;
}
int r = librbd::write(ictx, ofs, len, bl.c_str(), 0);
tracepoint(librbd, write_exit, r);
return r;
}
ssize_t Image::write2(uint64_t ofs, size_t len, bufferlist& bl, int op_flags)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, write2_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only,
ofs, len, bl.length() < len ? NULL : bl.c_str(), op_flags);
if (bl.length() < len) {
tracepoint(librbd, write_exit, -EINVAL);
return -EINVAL;
}
int r = librbd::write(ictx, ofs, len, bl.c_str(), op_flags);
tracepoint(librbd, write_exit, r);
return r;
}
int Image::discard(uint64_t ofs, uint64_t len)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, discard_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, ofs, len);
int r = librbd::discard(ictx, ofs, len);
tracepoint(librbd, discard_exit, r);
return r;
}
int Image::aio_write(uint64_t off, size_t len, bufferlist& bl,
RBD::AioCompletion *c)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, aio_write_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, off, len, bl.length() < len ? NULL : bl.c_str(), c->pc);
if (bl.length() < len) {
tracepoint(librbd, aio_write_exit, -EINVAL);
return -EINVAL;
}
ictx->aio_work_queue->queue(new C_AioWriteWQ(ictx, off, len, bl.c_str(),
get_aio_completion(c), 0));
tracepoint(librbd, aio_write_exit, 0);
return 0;
}
int Image::aio_write2(uint64_t off, size_t len, bufferlist& bl,
RBD::AioCompletion *c, int op_flags)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, aio_write2_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(),
ictx->read_only, off, len, bl.length() < len ? NULL : bl.c_str(), c->pc, op_flags);
if (bl.length() < len) {
tracepoint(librbd, aio_write_exit, -EINVAL);
return -EINVAL;
}
ictx->aio_work_queue->queue(new C_AioWriteWQ(ictx, off, len, bl.c_str(),
get_aio_completion(c),
op_flags));
tracepoint(librbd, aio_write_exit, 0);
return 0;
}
int Image::aio_discard(uint64_t off, uint64_t len, RBD::AioCompletion *c)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, aio_discard_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, off, len, c->pc);
ictx->aio_work_queue->queue(new C_AioDiscardWQ(ictx, off, len,
get_aio_completion(c)));
tracepoint(librbd, aio_discard_exit, 0);
return 0;
}
int Image::aio_read(uint64_t off, size_t len, bufferlist& bl,
RBD::AioCompletion *c)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, aio_read_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, off, len, bl.c_str(), c->pc);
ldout(ictx->cct, 10) << "Image::aio_read() buf=" << (void *)bl.c_str() << "~"
<< (void *)(bl.c_str() + len - 1) << dendl;
ictx->aio_work_queue->queue(new C_AioReadWQ(ictx, off, len, NULL, &bl,
get_aio_completion(c), 0));
tracepoint(librbd, aio_read_exit, 0);
return 0;
}
int Image::aio_read2(uint64_t off, size_t len, bufferlist& bl,
RBD::AioCompletion *c, int op_flags)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, aio_read2_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(),
ictx->read_only, off, len, bl.c_str(), c->pc, op_flags);
ldout(ictx->cct, 10) << "Image::aio_read() buf=" << (void *)bl.c_str() << "~"
<< (void *)(bl.c_str() + len - 1) << dendl;
ictx->aio_work_queue->queue(new C_AioReadWQ(ictx, off, len, NULL, &bl,
get_aio_completion(c),
op_flags));
tracepoint(librbd, aio_read_exit, 0);
return 0;
}
int Image::flush()
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, flush_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only);
int r = librbd::flush(ictx);
tracepoint(librbd, flush_exit, r);
return r;
}
int Image::aio_flush(RBD::AioCompletion *c)
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, aio_flush_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only, c->pc);
ictx->aio_work_queue->queue(new C_AioFlushWQ(ictx, get_aio_completion(c)));
tracepoint(librbd, aio_flush_exit, 0);
return 0;
}
int Image::invalidate_cache()
{
ImageCtx *ictx = (ImageCtx *)ctx;
tracepoint(librbd, invalidate_cache_enter, ictx, ictx->name.c_str(), ictx->snap_name.c_str(), ictx->read_only);
int r = librbd::invalidate_cache(ictx);
tracepoint(librbd, invalidate_cache_exit, r);
return r;
}
} // namespace librbd
extern "C" void rbd_version(int *major, int *minor, int *extra)
{
if (major)
*major = LIBRBD_VER_MAJOR;
if (minor)
*minor = LIBRBD_VER_MINOR;
if (extra)
*extra = LIBRBD_VER_EXTRA;
}
/* images */
extern "C" int rbd_list(rados_ioctx_t p, char *names, size_t *size)
{
librados::IoCtx io_ctx;
librados::IoCtx::from_rados_ioctx_t(p, io_ctx);
tracepoint(librbd, list_enter, io_ctx.get_pool_name().c_str(), io_ctx.get_id());
vector<string> cpp_names;
int r = librbd::list(io_ctx, cpp_names);
if (r == -ENOENT) {
tracepoint(librbd, list_exit, 0, *size);
return 0;
}
if (r < 0) {
tracepoint(librbd, list_exit, r, *size);
return r;
}
size_t expected_size = 0;
for (size_t i = 0; i < cpp_names.size(); i++) {
expected_size += cpp_names[i].size() + 1;
}
if (*size < expected_size) {
*size = expected_size;
tracepoint(librbd, list_exit, -ERANGE, *size);
return -ERANGE;
}
if (!names)
return -EINVAL;
for (int i = 0; i < (int)cpp_names.size(); i++) {
const char* name = cpp_names[i].c_str();
tracepoint(librbd, list_entry, name);
strcpy(names, name);
names += strlen(names) + 1;
}
tracepoint(librbd, list_exit, (int)expected_size, *size);
return (int)expected_size;
}
extern "C" int rbd_create(rados_ioctx_t p, const char *name, uint64_t size, int *order)
{
librados::IoCtx io_ctx;
librados::IoCtx::from_rados_ioctx_t(p, io_ctx);
tracepoint(librbd, create_enter, io_ctx.get_pool_name().c_str(), io_ctx.get_id(), name, size, *order);
int r = librbd::create(io_ctx, name, size, order);
tracepoint(librbd, create_exit, r, *order);
return r;
}
extern "C" int rbd_create2(rados_ioctx_t p, const char *name,
uint64_t size, uint64_t features,
int *order)
{
librados::IoCtx io_ctx;
librados::IoCtx::from_rados_ioctx_t(p, io_ctx);
tracepoint(librbd, create2_enter, io_ctx.get_pool_name().c_str(), io_ctx.get_id(), name, size, features, *order);
int r = librbd::create(io_ctx, name, size, false, features, order, 0, 0);
tracepoint(librbd, create2_exit, r, *order);
return r;
}
extern "C" int rbd_create3(rados_ioctx_t p, const char *name,
uint64_t size, uint64_t features,
int *order,
uint64_t stripe_unit, uint64_t stripe_count)
{
librados::IoCtx io_ctx;
librados::IoCtx::from_rados_ioctx_t(p, io_ctx);
tracepoint(librbd, create3_enter, io_ctx.get_pool_name().c_str(), io_ctx.get_id(), name, size, features, *order, stripe_unit, stripe_count);
int r = librbd::create(io_ctx, name, size, false, features, order,
stripe_unit, stripe_count);
tracepoint(librbd, create3_exit, r, *order);
return r;
}
extern "C" int rbd_clone(rados_ioctx_t p_ioctx, const char *p_name,
const char *p_snap_name, rados_ioctx_t c_ioctx,
const char *c_name, uint64_t features, int *c_order)
{
librados::IoCtx p_ioc, c_ioc;
librados::IoCtx::from_rados_ioctx_t(p_ioctx, p_ioc);
librados::IoCtx::from_rados_ioctx_t(c_ioctx, c_ioc);
tracepoint(librbd, clone_enter, p_ioc.get_pool_name().c_str(), p_ioc.get_id(), p_name, p_snap_name, c_ioc.get_pool_name().c_str(), c_ioc.get_id(), c_name, features);
int r = librbd::clone(p_ioc, p_name, p_snap_name, c_ioc, c_name,
features, c_order, 0, 0);
tracepoint(librbd, clone_exit, r, *c_order);
return r;
}
extern "C" int rbd_clone2(rados_ioctx_t p_ioctx, const char *p_name,
const char *p_snap_name, rados_ioctx_t c_ioctx,
const char *c_name, uint64_t features, int *c_order,
uint64_t stripe_unit, int stripe_count)
{
librados::IoCtx p_ioc, c_ioc;
librados::IoCtx::from_rados_ioctx_t(p_ioctx, p_ioc);
librados::IoCtx::from_rados_ioctx_t(c_ioctx, c_ioc);
tracepoint(librbd, clone2_enter, p_ioc.get_pool_name().c_str(), p_ioc.get_id(), p_name, p_snap_name, c_ioc.get_pool_name().c_str(), c_ioc.get_id(), c_name, features, stripe_unit, stripe_count);
int r = librbd::clone(p_ioc, p_name, p_snap_name, c_ioc, c_name,
features, c_order, stripe_unit, stripe_count);
tracepoint(librbd, clone2_exit, r, *c_order);
return r;
}