--- /dev/null
+// -*- 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) 2021 Red Hat, Inc.
+ *
+ * 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 <boost/smart_ptr/intrusive_ptr.hpp>
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <iomanip>
+#include <iostream>
+#include <regex>
+#include <sstream>
+#include <string_view>
+
+#include <limits.h>
+#include <string.h>
+
+#include "include/ceph_assert.h"
+#include "include/rados/librados.hpp"
+
+#include "cls/lock/cls_lock_client.h"
+
+#include "common/ceph_argparse.h"
+#include "common/ceph_mutex.h"
+#include "common/common_init.h"
+#include "common/config.h"
+#include "common/debug.h"
+#include "common/errno.h"
+#include "common/version.h"
+
+#include "SimpleRADOSStriper.h"
+
+using ceph::bufferlist;
+
+#define dout_subsys ceph_subsys_client
+#undef dout_prefix
+#define dout_prefix *_dout << "client." << ioctx.get_instance_id() << ": SimpleRADOSStriper: " << __func__ << ": " << oid << ": "
+#define d(lvl) ldout((CephContext*)ioctx.cct(), (lvl))
+
+enum {
+ P_FIRST = 0xe0000,
+ P_UPDATE_METADATA,
+ P_UPDATE_ALLOCATED,
+ P_UPDATE_SIZE,
+ P_UPDATE_VERSION,
+ P_SHRINK,
+ P_SHRINK_BYTES,
+ P_LOCK,
+ P_UNLOCK,
+ P_LAST,
+};
+
+int SimpleRADOSStriper::config_logger(CephContext* cct, std::string_view name, std::shared_ptr<PerfCounters>* l)
+{
+ PerfCountersBuilder plb(cct, name.data(), P_FIRST, P_LAST);
+ plb.add_u64_counter(P_UPDATE_METADATA, "update_metadata", "Number of metadata updates");
+ plb.add_u64_counter(P_UPDATE_ALLOCATED, "update_allocated", "Number of allocated updates");
+ plb.add_u64_counter(P_UPDATE_SIZE, "update_size", "Number of size updates");
+ plb.add_u64_counter(P_UPDATE_VERSION, "update_version", "Number of version updates");
+ plb.add_u64_counter(P_SHRINK, "shrink", "Number of allocation shrinks");
+ plb.add_u64_counter(P_SHRINK_BYTES, "shrink_bytes", "Bytes shrunk");
+ plb.add_u64_counter(P_LOCK, "lock", "Number of locks");
+ plb.add_u64_counter(P_UNLOCK, "unlock", "Number of unlocks");
+ l->reset(plb.create_perf_counters());
+ return 0;
+}
+
+SimpleRADOSStriper::~SimpleRADOSStriper()
+{
+ if (lock_keeper.joinable()) {
+ shutdown = true;
+ lock_keeper_cvar.notify_all();
+ lock_keeper.join();
+ }
+
+ if (ioctx.is_valid()) {
+ d(5) << dendl;
+
+ if (is_locked()) {
+ unlock();
+ }
+ }
+}
+
+SimpleRADOSStriper::extent SimpleRADOSStriper::get_next_extent(uint64_t off, size_t len) const
+{
+ extent e;
+ {
+ uint64_t stripe = (off>>object_size);
+ CachedStackStringStream css;
+ *css << oid;
+ *css << ".";
+ *css << std::setw(16) << std::setfill('0') << std::hex << stripe;
+ e.soid = css->str();
+ }
+ e.off = off & ((1<<object_size)-1);
+ e.len = std::min<size_t>(len, (1<<object_size)-e.off);
+ return e;
+}
+
+int SimpleRADOSStriper::remove()
+{
+ d(5) << dendl;
+
+ if (blocklisted.load()) {
+ return -EBLOCKLISTED;
+ }
+
+ if (int rc = wait_for_aios(true); rc < 0) {
+ aios_failure = 0;
+ return rc;
+ }
+
+ if (int rc = set_metadata(0, true); rc < 0) {
+ return rc;
+ }
+
+ auto ext = get_first_extent();
+ if (int rc = ioctx.remove(ext.soid); rc < 0) {
+ d(5) << " remove failed: " << cpp_strerror(rc) << dendl;
+ return rc;
+ }
+
+ locked = false;
+
+ return 0;
+}
+
+int SimpleRADOSStriper::truncate(uint64_t size)
+{
+ d(5) << size << dendl;
+
+ if (blocklisted.load()) {
+ return -EBLOCKLISTED;
+ }
+
+ /* TODO: (not currently used by SQLite) handle growth + sparse */
+ if (int rc = set_metadata(size, true); rc < 0) {
+ return rc;
+ }
+
+ return 0;
+}
+
+int SimpleRADOSStriper::wait_for_aios(bool block)
+{
+ while (!aios.empty()) {
+ auto& aiocp = aios.front();
+ int rc;
+ if (block) {
+ rc = aiocp->wait_for_complete();
+ } else {
+ if (aiocp->is_complete()) {
+ rc = aiocp->get_return_value();
+ } else {
+ return 0;
+ }
+ }
+ if (rc) {
+ d(5) << " aio failed: " << cpp_strerror(rc) << dendl;
+ if (aios_failure == 0) {
+ aios_failure = rc;
+ }
+ }
+ aios.pop();
+ }
+ return aios_failure;
+}
+
+int SimpleRADOSStriper::flush()
+{
+ d(5) << dendl;
+
+ if (blocklisted.load()) {
+ return -EBLOCKLISTED;
+ }
+
+ if (size_dirty) {
+ if (int rc = set_metadata(size, true); rc < 0) {
+ return rc;
+ }
+ }
+
+ if (int rc = wait_for_aios(true); rc < 0) {
+ aios_failure = 0;
+ return rc;
+ }
+
+ return 0;
+}
+
+int SimpleRADOSStriper::stat(uint64_t* s)
+{
+ d(5) << dendl;
+
+ if (blocklisted.load()) {
+ return -EBLOCKLISTED;
+ }
+
+ *s = size;
+ return 0;
+}
+
+int SimpleRADOSStriper::create()
+{
+ d(5) << dendl;
+
+ if (blocklisted.load()) {
+ return -EBLOCKLISTED;
+ }
+
+ auto ext = get_first_extent();
+ auto op = librados::ObjectWriteOperation();
+ /* exclusive create ensures we do none of these setxattrs happen if it fails */
+ op.create(1);
+ op.setxattr(XATTR_VERSION, uint2bl(0));
+ op.setxattr(XATTR_EXCL, bufferlist());
+ op.setxattr(XATTR_SIZE, uint2bl(0));
+ op.setxattr(XATTR_ALLOCATED, uint2bl(0));
+ op.setxattr(XATTR_LAYOUT_STRIPE_UNIT, uint2bl(1));
+ op.setxattr(XATTR_LAYOUT_STRIPE_COUNT, uint2bl(1));
+ op.setxattr(XATTR_LAYOUT_OBJECT_SIZE, uint2bl(1<<object_size));
+ if (int rc = ioctx.operate(ext.soid, &op); rc < 0) {
+ return rc; /* including EEXIST */
+ }
+ return 0;
+}
+
+int SimpleRADOSStriper::open()
+{
+ d(5) << oid << dendl;
+
+ if (blocklisted.load()) {
+ return -EBLOCKLISTED;
+ }
+
+ auto ext = get_first_extent();
+ auto op = librados::ObjectReadOperation();
+ bufferlist bl_excl, bl_size, bl_alloc, bl_version, pbl;
+ int prval_excl, prval_size, prval_alloc, prval_version;
+ op.getxattr(XATTR_EXCL, &bl_excl, &prval_excl);
+ op.getxattr(XATTR_SIZE, &bl_size, &prval_size);
+ op.getxattr(XATTR_ALLOCATED, &bl_alloc, &prval_alloc);
+ op.getxattr(XATTR_VERSION, &bl_version, &prval_version);
+ if (int rc = ioctx.operate(ext.soid, &op, &pbl); rc < 0) {
+ d(5) << " getxattr failed: " << cpp_strerror(rc) << dendl;
+ return rc;
+ }
+ exclusive_holder = bl_excl.to_str();
+ {
+ auto sstr = bl_size.to_str();
+ std::string err;
+ size = strict_strtoll(sstr.c_str(), 10, &err);
+ ceph_assert(err.empty());
+ }
+ {
+ auto sstr = bl_alloc.to_str();
+ std::string err;
+ allocated = strict_strtoll(sstr.c_str(), 10, &err);
+ ceph_assert(err.empty());
+ }
+ {
+ auto sstr = bl_version.to_str();
+ std::string err;
+ version = strict_strtoll(sstr.c_str(), 10, &err);
+ ceph_assert(err.empty());
+ }
+ d(15) << " size: " << size << " allocated: " << allocated << " version: " << version << dendl;
+ return 0;
+}
+
+int SimpleRADOSStriper::shrink_alloc(uint64_t a)
+{
+ d(5) << dendl;
+ std::vector<aiocompletionptr> removes;
+
+ ceph_assert(a <= allocated);
+ uint64_t prune = std::max<uint64_t>(a, (1u << object_size)); /* never delete first extent here */
+ uint64_t len = allocated - prune;
+ const uint64_t bytes_removed = len;
+ uint64_t offset = prune;
+ while (len > 0) {
+ auto ext = get_next_extent(offset, len);
+ auto aiocp = aiocompletionptr(librados::Rados::aio_create_completion());
+ if (int rc = ioctx.aio_remove(ext.soid, aiocp.get()); rc < 0) {
+ d(5) << " aio_remove failed: " << cpp_strerror(rc) << dendl;
+ return rc;
+ }
+ removes.emplace_back(std::move(aiocp));
+ len -= ext.len;
+ offset += ext.len;
+ }
+
+ for (auto& aiocp : removes) {
+ if (int rc = aiocp->wait_for_complete(); rc < 0 && rc != -ENOENT) {
+ d(5) << " aio_remove failed: " << cpp_strerror(rc) << dendl;
+ return rc;
+ }
+ }
+
+ auto ext = get_first_extent();
+ auto op = librados::ObjectWriteOperation();
+ auto aiocp = aiocompletionptr(librados::Rados::aio_create_completion());
+ op.setxattr(XATTR_ALLOCATED, uint2bl(a));
+ d(15) << " updating allocated to " << a << dendl;
+ op.setxattr(XATTR_VERSION, uint2bl(version+1));
+ d(15) << " updating version to " << (version+1) << dendl;
+ if (int rc = ioctx.aio_operate(ext.soid, aiocp.get(), &op); rc < 0) {
+ d(5) << " update failed: " << cpp_strerror(rc) << dendl;
+ return rc;
+ }
+ /* we need to wait so we don't have dangling extents */
+ d(10) << " waiting for allocated update" << dendl;
+ if (int rc = aiocp->wait_for_complete(); rc < 0) {
+ d(1) << " update failure: " << cpp_strerror(rc) << dendl;
+ return rc;
+ }
+ if (logger) {
+ logger->inc(P_UPDATE_METADATA);
+ logger->inc(P_UPDATE_ALLOCATED);
+ logger->inc(P_UPDATE_VERSION);
+ logger->inc(P_SHRINK);
+ logger->inc(P_SHRINK_BYTES, bytes_removed);
+ }
+
+ version += 1;
+ allocated = a;
+ return 0;
+}
+
+int SimpleRADOSStriper::maybe_shrink_alloc()
+{
+ d(15) << dendl;
+
+ if (size == 0) {
+ if (allocated > 0) {
+ d(10) << "allocation shrink to 0" << dendl;
+ return shrink_alloc(0);
+ } else {
+ return 0;
+ }
+ }
+
+ uint64_t mask = (1<<object_size)-1;
+ uint64_t new_allocated = min_growth + ((size + mask) & ~mask); /* round up base 2 */
+ if (allocated > new_allocated && ((allocated-new_allocated) > min_growth)) {
+ d(10) << "allocation shrink to " << new_allocated << dendl;
+ return shrink_alloc(new_allocated);
+ }
+
+ return 0;
+}
+
+bufferlist SimpleRADOSStriper::str2bl(std::string_view sv)
+{
+ bufferlist bl;
+ bl.append(sv);
+ return bl;
+}
+
+bufferlist SimpleRADOSStriper::uint2bl(uint64_t v)
+{
+ CachedStackStringStream css;
+ *css << std::dec << std::setw(16) << std::setfill('0') << v;
+ bufferlist bl;
+ bl.append(css->strv());
+ return bl;
+}
+
+int SimpleRADOSStriper::set_metadata(uint64_t new_size, bool update_size)
+{
+ d(10) << " new_size: " << new_size
+ << " update_size: " << update_size
+ << " allocated: " << allocated
+ << " size: " << size
+ << " version: " << version
+ << dendl;
+
+ bool do_op = false;
+ auto new_allocated = allocated;
+ auto ext = get_first_extent();
+ auto op = librados::ObjectWriteOperation();
+ if (new_size > allocated) {
+ uint64_t mask = (1<<object_size)-1;
+ new_allocated = min_growth + ((size + mask) & ~mask); /* round up base 2 */
+ op.setxattr(XATTR_ALLOCATED, uint2bl(new_allocated));
+ do_op = true;
+ if (logger) logger->inc(P_UPDATE_ALLOCATED);
+ d(15) << " updating allocated to " << new_allocated << dendl;
+ }
+ if (update_size) {
+ op.setxattr(XATTR_SIZE, uint2bl(new_size));
+ do_op = true;
+ if (logger) logger->inc(P_UPDATE_SIZE);
+ d(15) << " updating size to " << new_size << dendl;
+ }
+ if (do_op) {
+ if (logger) logger->inc(P_UPDATE_METADATA);
+ if (logger) logger->inc(P_UPDATE_VERSION);
+ op.setxattr(XATTR_VERSION, uint2bl(version+1));
+ d(15) << " updating version to " << (version+1) << dendl;
+ auto aiocp = aiocompletionptr(librados::Rados::aio_create_completion());
+ if (int rc = ioctx.aio_operate(ext.soid, aiocp.get(), &op); rc < 0) {
+ d(1) << " update failure: " << cpp_strerror(rc) << dendl;
+ return rc;
+ }
+ version += 1;
+ if (allocated != new_allocated) {
+ /* we need to wait so we don't have dangling extents */
+ d(10) << "waiting for allocated update" << dendl;
+ if (int rc = aiocp->wait_for_complete(); rc < 0) {
+ d(1) << " update failure: " << cpp_strerror(rc) << dendl;
+ return rc;
+ }
+ aiocp.reset();
+ allocated = new_allocated;
+ }
+ if (aiocp) {
+ aios.emplace(std::move(aiocp));
+ }
+ if (update_size) {
+ size = new_size;
+ size_dirty = false;
+ return maybe_shrink_alloc();
+ }
+ }
+ return 0;
+}
+
+ssize_t SimpleRADOSStriper::write(const void* data, size_t len, uint64_t off)
+{
+ d(5) << off << "~" << len << dendl;
+
+ if (blocklisted.load()) {
+ return -EBLOCKLISTED;
+ }
+
+ if (allocated < (len+off)) {
+ if (int rc = set_metadata(len+off, false); rc < 0) {
+ return rc;
+ }
+ }
+
+ size_t w = 0;
+ while ((len-w) > 0) {
+ auto ext = get_next_extent(off+w, len-w);
+ auto aiocp = aiocompletionptr(librados::Rados::aio_create_completion());
+ bufferlist bl;
+ bl.append((const char*)data+w, ext.len);
+ if (int rc = ioctx.aio_write(ext.soid, aiocp.get(), bl, ext.len, ext.off); rc < 0) {
+ break;
+ }
+ aios.emplace(std::move(aiocp));
+ w += ext.len;
+ }
+
+ wait_for_aios(false); // clean up finished completions
+
+ if (size < (len+off)) {
+ size = len+off;
+ size_dirty = true;
+ d(10) << " dirty size: " << size << dendl;
+ }
+
+ return (ssize_t)w;
+}
+
+ssize_t SimpleRADOSStriper::read(void* data, size_t len, uint64_t off)
+{
+ d(5) << off << "~" << len << dendl;
+
+ if (blocklisted.load()) {
+ return -EBLOCKLISTED;
+ }
+
+ size_t r = 0;
+ std::vector<std::pair<bufferlist, aiocompletionptr>> reads;
+ while ((len-r) > 0) {
+ auto ext = get_next_extent(off+r, len-r);
+ auto& [bl, aiocp] = reads.emplace_back();
+ aiocp = aiocompletionptr(librados::Rados::aio_create_completion());
+ if (int rc = ioctx.aio_read(ext.soid, aiocp.get(), &bl, ext.len, ext.off); rc < 0) {
+ d(1) << " read failure: " << cpp_strerror(rc) << dendl;
+ return rc;
+ }
+ r += ext.len;
+ }
+
+ r = 0;
+ for (auto& [bl, aiocp] : reads) {
+ if (int rc = aiocp->wait_for_complete(); rc < 0) {
+ d(1) << " read failure: " << cpp_strerror(rc) << dendl;
+ return rc;
+ }
+ bl.begin().copy(bl.length(), ((char*)data)+r);
+ r += bl.length();
+ }
+ ceph_assert(r <= len);
+
+ return r;
+}
+
+int SimpleRADOSStriper::print_lockers(std::ostream& out)
+{
+ int exclusive;
+ std::string tag;
+ std::list<librados::locker_t> lockers;
+ auto ext = get_first_extent();
+ if (int rc = ioctx.list_lockers(ext.soid, biglock, &exclusive, &tag, &lockers); rc < 0) {
+ d(1) << " list_lockers failure: " << cpp_strerror(rc) << dendl;
+ return rc;
+ }
+ if (lockers.empty()) {
+ out << " lockers none";
+ } else {
+ out << " lockers exclusive=" << exclusive << " tag=" << tag << " lockers=[";
+ bool first = true;
+ for (const auto& l : lockers) {
+ if (!first) out << ",";
+ out << l.client << ":" << l.cookie << ":" << l.address;
+ }
+ out << "]";
+ }
+ return 0;
+}
+
+/* Do lock renewal in a separate thread: while it's unlikely sqlite chews on
+ * something for multiple seconds without calling into the VFS (where we could
+ * initiate a lock renewal), it's not impossible with complex queries. Also, we
+ * want to allow "PRAGMA locking_mode = exclusive" where the application may
+ * not use the sqlite3 database connection for an indeterminate amount of time.
+ */
+void SimpleRADOSStriper::lock_keeper_main(void)
+{
+ d(20) << dendl;
+ const auto ext = get_first_extent();
+ while (!shutdown) {
+ d(20) << "tick" << dendl;
+ std::unique_lock lock(lock_keeper_mutex);
+ auto now = clock::now();
+ auto since = now-last_renewal;
+
+ if (since >= lock_keeper_interval && locked) {
+ d(10) << "renewing lock" << dendl;
+ auto tv = ceph::to_timeval(lock_keeper_timeout);
+ int rc = ioctx.lock_exclusive(ext.soid, biglock, cookie.to_string(), lockdesc, &tv, LIBRADOS_LOCK_FLAG_MUST_RENEW);
+ if (rc) {
+ /* If lock renewal fails, we cannot continue the application. Return
+ * -EBLOCKLISTED for all calls into the striper for this instance, even
+ * if we're not actually blocklisted.
+ */
+ d(-1) << "lock renewal failed: " << cpp_strerror(rc) << dendl;
+ blocklisted = true;
+ break;
+ }
+ last_renewal = clock::now();
+ }
+
+ lock_keeper_cvar.wait_for(lock, lock_keeper_interval);
+ }
+}
+
+int SimpleRADOSStriper::recover_lock()
+{
+ d(5) << "attempting to recover lock" << dendl;
+
+ std::string addrs;
+ const auto ext = get_first_extent();
+
+ {
+ auto tv = ceph::to_timeval(lock_keeper_timeout);
+ if (int rc = ioctx.lock_exclusive(ext.soid, biglock, cookie.to_string(), lockdesc, &tv, 0); rc < 0) {
+ return rc;
+ }
+ locked = true;
+ last_renewal = clock::now();
+ }
+
+ d(5) << "acquired lock, fetching last owner" << dendl;
+
+ {
+ bufferlist bl_excl;
+ if (int rc = ioctx.getxattr(ext.soid, XATTR_EXCL, bl_excl); rc < 0) {
+ if (rc == -ENOENT) {
+ /* someone removed it? ok... */
+ goto setowner;
+ } else {
+ d(-1) << "could not recover exclusive locker" << dendl;
+ locked = false; /* it will drop eventually */
+ return -EIO;
+ }
+ }
+ addrs = bl_excl.to_str();
+ }
+
+ if (addrs.empty()) {
+ d(5) << "someone else cleaned up" << dendl;
+ goto setowner;
+ } else {
+ d(5) << "exclusive lock holder was " << addrs << dendl;
+ }
+
+ if (blocklist_the_dead) {
+ entity_addrvec_t addrv;
+ addrv.parse(addrs.c_str());
+ auto R = librados::Rados(ioctx);
+ auto b = "blocklist"sv;
+retry:
+ for (auto& a : addrv.v) {
+ CachedStackStringStream css;
+ *css << "{\"prefix\":\"osd " << b << "\", \"" << b << "op\":\"add\",";
+ *css << "\"addr\":\"";
+ *css << a;
+ *css << "\"}";
+ std::vector<std::string> cmd = {css->str()};
+ d(5) << "sending blocklist command: " << cmd << dendl;
+ std::string out;
+ if (int rc = R.mon_command(css->str(), bufferlist(), nullptr, &out); rc < 0) {
+ if (rc == -EINVAL && b == "blocklist"sv) {
+ b = "blacklist"sv;
+ goto retry;
+ }
+ d(-1) << "Cannot proceed with recovery because I have failed to blocklist the old client: " << cpp_strerror(rc) << ", out = " << out << dendl;
+ locked = false; /* it will drop eventually */
+ return -EIO;
+ }
+ }
+ /* Ensure our osd_op requests have the latest epoch. */
+ R.wait_for_latest_osdmap();
+ }
+
+setowner:
+ d(5) << "setting new owner to myself, " << myaddrs << dendl;
+ {
+ auto myaddrbl = str2bl(myaddrs);
+ if (int rc = ioctx.setxattr(ext.soid, XATTR_EXCL, myaddrbl); rc < 0) {
+ d(-1) << "could not set lock owner" << dendl;
+ locked = false; /* it will drop eventually */
+ return -EIO;
+ }
+ }
+ return 0;
+}
+
+int SimpleRADOSStriper::lock(uint64_t timeoutms)
+{
+ /* XXX: timeoutms is unused */
+ d(5) << "timeout=" << timeoutms << dendl;
+
+ if (blocklisted.load()) {
+ return -EBLOCKLISTED;
+ }
+
+ std::scoped_lock lock(lock_keeper_mutex);
+
+ ceph_assert(!is_locked());
+
+ /* We're going to be very lazy here in implementation: only exclusive locks
+ * are allowed. That even ensures a single reader.
+ */
+ uint64_t slept = 0;
+
+ auto ext = get_first_extent();
+ while (true) {
+ /* The general fast path in one compound operation: obtain the lock,
+ * confirm the past locker cleaned up after themselves (set XATTR_EXCL to
+ * ""), then finally set XATTR_EXCL to our address vector as the new
+ * exclusive locker.
+ */
+
+ auto op = librados::ObjectWriteOperation();
+ auto tv = ceph::to_timeval(lock_keeper_timeout);
+ utime_t duration;
+ duration.set_from_timeval(&tv);
+ rados::cls::lock::lock(&op, biglock, ClsLockType::EXCLUSIVE, cookie.to_string(), "", lockdesc, duration, 0);
+ op.cmpxattr(XATTR_EXCL, LIBRADOS_CMPXATTR_OP_EQ, bufferlist());
+ op.setxattr(XATTR_EXCL, str2bl(myaddrs));
+ int rc = ioctx.operate(ext.soid, &op);
+ if (rc == 0) {
+ locked = true;
+ last_renewal = clock::now();
+ break;
+ } else if (rc == -EBUSY) {
+ if ((slept % 500000) == 0) {
+ d(-1) << "waiting for locks: ";
+ print_lockers(*_dout);
+ *_dout << dendl;
+ }
+ usleep(5000);
+ slept += 5000;
+ continue;
+ } else if (rc == -ECANCELED) {
+ /* CMPXATTR failed, a locker didn't cleanup. Try to recover! */
+ if (rc = recover_lock(); rc < 0) {
+ if (rc == -EBUSY) {
+ continue; /* try again */
+ }
+ return rc;
+ }
+ break;
+ } else {
+ d(-1) << " lock failed: " << cpp_strerror(rc) << dendl;
+ return rc;
+ }
+ }
+
+ if (!lock_keeper.joinable()) {
+ lock_keeper = std::thread(&SimpleRADOSStriper::lock_keeper_main, this);
+ }
+
+ if (int rc = open(); rc < 0) {
+ d(5) << " open failed: " << cpp_strerror(rc) << dendl;
+ return rc;
+ }
+
+ d(5) << " = 0" << dendl;
+ if (logger) {
+ logger->inc(P_LOCK);
+ }
+
+ return 0;
+}
+
+int SimpleRADOSStriper::unlock()
+{
+ d(5) << dendl;
+
+ if (blocklisted.load()) {
+ return -EBLOCKLISTED;
+ }
+
+ std::scoped_lock lock(lock_keeper_mutex);
+
+ ceph_assert(is_locked());
+
+ /* wait for flush of metadata */
+ if (int rc = flush(); rc < 0) {
+ return rc;
+ }
+
+ const auto ext = get_first_extent();
+ auto op = librados::ObjectWriteOperation();
+ op.cmpxattr(XATTR_EXCL, LIBRADOS_CMPXATTR_OP_EQ, str2bl(myaddrs));
+ op.setxattr(XATTR_EXCL, bufferlist());
+ rados::cls::lock::unlock(&op, biglock, cookie.to_string());
+ if (int rc = ioctx.operate(ext.soid, &op); rc < 0) {
+ d(-1) << " unlock failed: " << cpp_strerror(rc) << dendl;
+ return rc;
+ }
+ locked = false;
+
+ d(5) << " = 0" << dendl;
+ if (logger) {
+ logger->inc(P_UNLOCK);
+ }
+
+ return 0;
+}
projects / ceph.git / blobdiff