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Client.cc
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Client.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) 2004-2006 Sage Weil <sage@newdream.net>
*
* 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.
*
*/
// unix-ey fs stuff
#include <unistd.h>
#include <sys/types.h>
#include <time.h>
#include <utime.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <fcntl.h>
#include <sys/file.h>
#ifndef _WIN32
#include <sys/utsname.h>
#endif
#include <sys/uio.h>
#include <boost/lexical_cast.hpp>
#include <boost/fusion/include/std_pair.hpp>
#include "common/async/waiter.h"
#if defined(__FreeBSD__) || defined(_WIN32)
#define XATTR_CREATE 0x1
#define XATTR_REPLACE 0x2
#else
#include <sys/xattr.h>
#endif
#if defined(__linux__)
#include <linux/falloc.h>
#endif
#include <sys/statvfs.h>
#include "common/config.h"
#include "common/version.h"
#include "common/async/blocked_completion.h"
#include "mon/MonClient.h"
#include "messages/MClientCaps.h"
#include "messages/MClientLease.h"
#include "messages/MClientQuota.h"
#include "messages/MClientReclaim.h"
#include "messages/MClientReclaimReply.h"
#include "messages/MClientReconnect.h"
#include "messages/MClientReply.h"
#include "messages/MClientRequest.h"
#include "messages/MClientRequestForward.h"
#include "messages/MClientSession.h"
#include "messages/MClientSnap.h"
#include "messages/MClientMetrics.h"
#include "messages/MCommandReply.h"
#include "messages/MFSMap.h"
#include "messages/MFSMapUser.h"
#include "messages/MMDSMap.h"
#include "messages/MOSDMap.h"
#include "mds/flock.h"
#include "mds/cephfs_features.h"
#include "osd/OSDMap.h"
#include "osdc/Filer.h"
#include "common/Cond.h"
#include "common/perf_counters.h"
#include "common/admin_socket.h"
#include "common/errno.h"
#include "include/str_list.h"
#define dout_subsys ceph_subsys_client
#include "include/lru.h"
#include "include/compat.h"
#include "include/stringify.h"
#include "include/random.h"
#include "Client.h"
#include "Inode.h"
#include "Dentry.h"
#include "Delegation.h"
#include "Dir.h"
#include "ClientSnapRealm.h"
#include "Fh.h"
#include "MetaSession.h"
#include "MetaRequest.h"
#include "ObjecterWriteback.h"
#include "posix_acl.h"
#include "include/ceph_assert.h"
#include "include/stat.h"
#include "include/cephfs/ceph_ll_client.h"
#if HAVE_GETGROUPLIST
#include <grp.h>
#include <pwd.h>
#include <unistd.h>
#endif
#undef dout_prefix
#define dout_prefix *_dout << "client." << whoami << " "
#define tout(cct) if (!cct->_conf->client_trace.empty()) traceout
// FreeBSD fails to define this
#ifndef O_DSYNC
#define O_DSYNC 0x0
#endif
// Darwin fails to define this
#ifndef O_RSYNC
#define O_RSYNC 0x0
#endif
#ifndef O_DIRECT
#define O_DIRECT 0x0
#endif
// Windows doesn't define those values. While the Posix compatibilty layer
// doesn't support those values, the Windows native functions do provide
// similar flags. Special care should be taken if we're going to use those
// flags in ceph-dokan. The current values are no-ops, while propagating
// them to the rest of the code might cause the Windows functions to reject
// them as invalid.
#ifndef O_NOFOLLOW
#define O_NOFOLLOW 0x0
#endif
#ifndef O_SYNC
#define O_SYNC 0x0
#endif
#define DEBUG_GETATTR_CAPS (CEPH_CAP_XATTR_SHARED)
#ifndef S_IXUGO
#define S_IXUGO (S_IXUSR|S_IXGRP|S_IXOTH)
#endif
using namespace TOPNSPC::common;
namespace bs = boost::system;
namespace ca = ceph::async;
void client_flush_set_callback(void *p, ObjectCacher::ObjectSet *oset)
{
Client *client = static_cast<Client*>(p);
client->flush_set_callback(oset);
}
bool Client::is_reserved_vino(vinodeno_t &vino) {
if (MDS_IS_PRIVATE_INO(vino.ino)) {
ldout(cct, -1) << __func__ << " attempt to access reserved inode number " << vino << dendl;
return true;
}
return false;
}
// running average and standard deviation -- presented in
// Donald Knuth's TAoCP, Volume II.
double calc_average(double old_avg, double value, uint64_t count) {
double new_avg;
if (count == 1) {
new_avg = value;
} else {
new_avg = old_avg + ((value - old_avg) / count);
}
return new_avg;
}
double calc_sq_sum(double old_sq_sum, double old_mean, double new_mean,
double value, uint64_t count) {
double new_sq_sum;
if (count == 1) {
new_sq_sum = 0.0;
} else {
new_sq_sum = old_sq_sum + (value - old_mean)*(value - new_mean);
}
return new_sq_sum;
}
// -------------
Client::CommandHook::CommandHook(Client *client) :
m_client(client)
{
}
int Client::CommandHook::call(
std::string_view command,
const cmdmap_t& cmdmap,
Formatter *f,
std::ostream& errss,
bufferlist& out)
{
f->open_object_section("result");
{
std::scoped_lock l{m_client->client_lock};
if (command == "mds_requests")
m_client->dump_mds_requests(f);
else if (command == "mds_sessions") {
bool cap_dump = false;
cmd_getval(cmdmap, "cap_dump", cap_dump);
m_client->dump_mds_sessions(f, cap_dump);
} else if (command == "dump_cache")
m_client->dump_cache(f);
else if (command == "kick_stale_sessions")
m_client->_kick_stale_sessions();
else if (command == "status")
m_client->dump_status(f);
else
ceph_abort_msg("bad command registered");
}
f->close_section();
return 0;
}
// -------------
int Client::get_fd_inode(int fd, InodeRef *in) {
int r = 0;
if (fd == CEPHFS_AT_FDCWD) {
*in = cwd;
} else {
Fh *f = get_filehandle(fd);
if (!f) {
r = -CEPHFS_EBADF;
} else {
*in = f->inode;
}
}
return r;
}
dir_result_t::dir_result_t(Inode *in, const UserPerm& perms)
: inode(in), offset(0), next_offset(2),
release_count(0), ordered_count(0), cache_index(0), start_shared_gen(0),
perms(perms)
{ }
void Client::_reset_faked_inos()
{
ino_t start = 1024;
free_faked_inos.clear();
free_faked_inos.insert(start, (uint32_t)-1 - start + 1);
last_used_faked_ino = 0;
last_used_faked_root = 0;
#ifdef _WIN32
// On Windows, sizeof(ino_t) is just 2. Despite that, most "native"
// Windows structures, including Dokan ones, are using 64B identifiers.
_use_faked_inos = false;
#else
_use_faked_inos = sizeof(ino_t) < 8 || cct->_conf->client_use_faked_inos;
#endif
}
void Client::_assign_faked_ino(Inode *in)
{
if (0 == last_used_faked_ino)
last_used_faked_ino = last_used_faked_ino + 2048; // start(1024)~2048 reserved for _assign_faked_root
interval_set<ino_t>::const_iterator it = free_faked_inos.lower_bound(last_used_faked_ino + 1);
if (it == free_faked_inos.end() && last_used_faked_ino > 0) {
last_used_faked_ino = 2048;
it = free_faked_inos.lower_bound(last_used_faked_ino + 1);
}
ceph_assert(it != free_faked_inos.end());
if (last_used_faked_ino < it.get_start()) {
ceph_assert(it.get_len() > 0);
last_used_faked_ino = it.get_start();
} else {
++last_used_faked_ino;
ceph_assert(it.get_start() + it.get_len() > last_used_faked_ino);
}
in->faked_ino = last_used_faked_ino;
free_faked_inos.erase(in->faked_ino);
faked_ino_map[in->faked_ino] = in->vino();
}
/*
* In the faked mode, if you export multiple subdirectories,
* you will see that the inode numbers of the exported subdirectories
* are the same. so we distinguish the mount point by reserving
* the "fake ids" between "1024~2048" and combining the last
* 10bits(0x3ff) of the "root inodes".
*/
void Client::_assign_faked_root(Inode *in)
{
interval_set<ino_t>::const_iterator it = free_faked_inos.lower_bound(last_used_faked_root + 1);
if (it == free_faked_inos.end() && last_used_faked_root > 0) {
last_used_faked_root = 0;
it = free_faked_inos.lower_bound(last_used_faked_root + 1);
}
assert(it != free_faked_inos.end());
vinodeno_t inode_info = in->vino();
uint64_t inode_num = (uint64_t)inode_info.ino;
ldout(cct, 10) << "inode_num " << inode_num << "inode_num & 0x3ff=" << (inode_num & 0x3ff)<< dendl;
last_used_faked_root = it.get_start() + (inode_num & 0x3ff); // 0x3ff mask and get_start will not exceed 2048
assert(it.get_start() + it.get_len() > last_used_faked_root);
in->faked_ino = last_used_faked_root;
free_faked_inos.erase(in->faked_ino);
faked_ino_map[in->faked_ino] = in->vino();
}
void Client::_release_faked_ino(Inode *in)
{
free_faked_inos.insert(in->faked_ino);
faked_ino_map.erase(in->faked_ino);
}
vinodeno_t Client::_map_faked_ino(ino_t ino)
{
vinodeno_t vino;
if (ino == 1)
vino = root->vino();
else if (faked_ino_map.count(ino))
vino = faked_ino_map[ino];
else
vino = vinodeno_t(0, CEPH_NOSNAP);
ldout(cct, 10) << __func__ << " " << ino << " -> " << vino << dendl;
return vino;
}
vinodeno_t Client::map_faked_ino(ino_t ino)
{
std::scoped_lock lock(client_lock);
return _map_faked_ino(ino);
}
// cons/des
Client::Client(Messenger *m, MonClient *mc, Objecter *objecter_)
: Dispatcher(m->cct->get()),
timer(m->cct, timer_lock, false),
messenger(m),
monclient(mc),
objecter(objecter_),
whoami(mc->get_global_id()),
mount_state(CLIENT_UNMOUNTED, "Client::mountstate_lock"),
initialize_state(CLIENT_NEW, "Client::initstate_lock"),
cct_deleter{m->cct, [](CephContext *p) {p->put();}},
async_ino_invalidator(m->cct),
async_dentry_invalidator(m->cct),
interrupt_finisher(m->cct),
remount_finisher(m->cct),
async_ino_releasor(m->cct),
objecter_finisher(m->cct),
m_command_hook(this),
fscid(0)
{
_reset_faked_inos();
user_id = cct->_conf->client_mount_uid;
group_id = cct->_conf->client_mount_gid;
fuse_default_permissions = cct->_conf.get_val<bool>(
"fuse_default_permissions");
_collect_and_send_global_metrics = cct->_conf.get_val<bool>(
"client_collect_and_send_global_metrics");
mount_timeout = cct->_conf.get_val<std::chrono::seconds>(
"client_mount_timeout");
caps_release_delay = cct->_conf.get_val<std::chrono::seconds>(
"client_caps_release_delay");
if (cct->_conf->client_acl_type == "posix_acl")
acl_type = POSIX_ACL;
lru.lru_set_midpoint(cct->_conf->client_cache_mid);
// file handles
free_fd_set.insert(10, 1<<30);
mdsmap.reset(new MDSMap);
// osd interfaces
writeback_handler.reset(new ObjecterWriteback(objecter, &objecter_finisher,
&client_lock));
objectcacher.reset(new ObjectCacher(cct, "libcephfs", *writeback_handler, client_lock,
client_flush_set_callback, // all commit callback
(void*)this,
cct->_conf->client_oc_size,
cct->_conf->client_oc_max_objects,
cct->_conf->client_oc_max_dirty,
cct->_conf->client_oc_target_dirty,
cct->_conf->client_oc_max_dirty_age,
true));
}
Client::~Client()
{
ceph_assert(ceph_mutex_is_not_locked(client_lock));
// If the task is crashed or aborted and doesn't
// get any chance to run the umount and shutdow.
{
std::scoped_lock l{client_lock};
tick_thread_stopped = true;
upkeep_cond.notify_one();
}
if (upkeeper.joinable())
upkeeper.join();
// It is necessary to hold client_lock, because any inode destruction
// may call into ObjectCacher, which asserts that it's lock (which is
// client_lock) is held.
std::scoped_lock l{client_lock};
tear_down_cache();
}
void Client::tear_down_cache()
{
// fd's
for (auto &[fd, fh] : fd_map) {
ldout(cct, 1) << __func__ << " forcing close of fh " << fd << " ino " << fh->inode->ino << dendl;
_release_fh(fh);
}
fd_map.clear();
while (!opened_dirs.empty()) {
dir_result_t *dirp = *opened_dirs.begin();
ldout(cct, 1) << __func__ << " forcing close of dir " << dirp << " ino " << dirp->inode->ino << dendl;
_closedir(dirp);
}
// caps!
// *** FIXME ***
// empty lru
trim_cache();
ceph_assert(lru.lru_get_size() == 0);
// close root ino
ceph_assert(inode_map.size() <= 1 + root_parents.size());
if (root && inode_map.size() == 1 + root_parents.size()) {
root.reset();
}
ceph_assert(inode_map.empty());
}
inodeno_t Client::get_root_ino()
{
std::scoped_lock l(client_lock);
if (use_faked_inos())
return root->faked_ino;
else
return root->ino;
}
Inode *Client::get_root()
{
std::scoped_lock l(client_lock);
root->ll_get();
return root.get();
}
// debug crapola
void Client::dump_inode(Formatter *f, Inode *in, set<Inode*>& did, bool disconnected)
{
filepath path;
in->make_long_path(path);
ldout(cct, 1) << "dump_inode: "
<< (disconnected ? "DISCONNECTED ":"")
<< "inode " << in->ino
<< " " << path
<< " ref " << in->get_nref()
<< " " << *in << dendl;
if (f) {
f->open_object_section("inode");
f->dump_stream("path") << path;
if (disconnected)
f->dump_int("disconnected", 1);
in->dump(f);
f->close_section();
}
did.insert(in);
if (in->dir) {
ldout(cct, 1) << " dir " << in->dir << " size " << in->dir->dentries.size() << dendl;
for (ceph::unordered_map<string, Dentry*>::iterator it = in->dir->dentries.begin();
it != in->dir->dentries.end();
++it) {
ldout(cct, 1) << " " << in->ino << " dn " << it->first << " " << it->second << " ref " << it->second->ref << dendl;
if (f) {
f->open_object_section("dentry");
it->second->dump(f);
f->close_section();
}
if (it->second->inode)
dump_inode(f, it->second->inode.get(), did, false);
}
}
}
void Client::dump_cache(Formatter *f)
{
set<Inode*> did;
ldout(cct, 1) << __func__ << dendl;
if (f)
f->open_array_section("cache");
if (root)
dump_inode(f, root.get(), did, true);
// make a second pass to catch anything disconnected
for (ceph::unordered_map<vinodeno_t, Inode*>::iterator it = inode_map.begin();
it != inode_map.end();
++it) {
if (did.count(it->second))
continue;
dump_inode(f, it->second, did, true);
}
if (f)
f->close_section();
}
void Client::dump_status(Formatter *f)
{
ceph_assert(ceph_mutex_is_locked_by_me(client_lock));
ldout(cct, 1) << __func__ << dendl;
const epoch_t osd_epoch
= objecter->with_osdmap(std::mem_fn(&OSDMap::get_epoch));
if (f) {
f->open_object_section("metadata");
for (const auto& kv : metadata)
f->dump_string(kv.first.c_str(), kv.second);
f->close_section();
f->dump_int("dentry_count", lru.lru_get_size());
f->dump_int("dentry_pinned_count", lru.lru_get_num_pinned());
f->dump_int("id", get_nodeid().v);
entity_inst_t inst(messenger->get_myname(), messenger->get_myaddr_legacy());
f->dump_object("inst", inst);
f->dump_object("addr", inst.addr);
f->dump_stream("inst_str") << inst.name << " " << inst.addr.get_legacy_str();
f->dump_string("addr_str", inst.addr.get_legacy_str());
f->dump_int("inode_count", inode_map.size());
f->dump_int("mds_epoch", mdsmap->get_epoch());
f->dump_int("osd_epoch", osd_epoch);
f->dump_int("osd_epoch_barrier", cap_epoch_barrier);
f->dump_bool("blocklisted", blocklisted);
f->dump_string("fs_name", mdsmap->get_fs_name());
}
}
void Client::_pre_init()
{
timer.init();
objecter_finisher.start();
filer.reset(new Filer(objecter, &objecter_finisher));
objectcacher->start();
}
int Client::init()
{
RWRef_t iref_writer(initialize_state, CLIENT_INITIALIZING, false);
ceph_assert(iref_writer.is_first_writer());
_pre_init();
{
std::scoped_lock l{client_lock};
messenger->add_dispatcher_tail(this);
}
_finish_init();
iref_writer.update_state(CLIENT_INITIALIZED);
return 0;
}
void Client::_finish_init()
{
{
std::scoped_lock l{client_lock};
// logger
PerfCountersBuilder plb(cct, "client", l_c_first, l_c_last);
plb.add_time_avg(l_c_reply, "reply", "Latency of receiving a reply on metadata request");
plb.add_time_avg(l_c_lat, "lat", "Latency of processing a metadata request");
plb.add_time_avg(l_c_wrlat, "wrlat", "Latency of a file data write operation");
plb.add_time_avg(l_c_read, "rdlat", "Latency of a file data read operation");
plb.add_time_avg(l_c_fsync, "fsync", "Latency of a file sync operation");
// average, standard deviation mds/r/w/ latencies
plb.add_time(l_c_md_avg, "mdavg", "Average latency for processing metadata requests");
plb.add_u64(l_c_md_sqsum, "mdsqsum", "Sum of squares (to calculate variability/stdev) for metadata requests");
plb.add_u64(l_c_md_ops, "mdops", "Total metadata IO operations");
plb.add_time(l_c_rd_avg, "readavg", "Average latency for processing read requests");
plb.add_u64(l_c_rd_sqsum, "readsqsum", "Sum of squares ((to calculate variability/stdev) for read requests");
plb.add_u64(l_c_rd_ops, "rdops", "Total read IO operations");
plb.add_time(l_c_wr_avg, "writeavg", "Average latency for processing write requests");
plb.add_u64(l_c_wr_sqsum, "writesqsum", "Sum of squares ((to calculate variability/stdev) for write requests");
plb.add_u64(l_c_wr_ops, "rdops", "Total write IO operations");
logger.reset(plb.create_perf_counters());
cct->get_perfcounters_collection()->add(logger.get());
}
cct->_conf.add_observer(this);
AdminSocket* admin_socket = cct->get_admin_socket();
int ret = admin_socket->register_command("mds_requests",
&m_command_hook,
"show in-progress mds requests");
if (ret < 0) {
lderr(cct) << "error registering admin socket command: "
<< cpp_strerror(-ret) << dendl;
}
ret = admin_socket->register_command("mds_sessions "
"name=cap_dump,type=CephBool,req=false",
&m_command_hook,
"show mds session state");
if (ret < 0) {
lderr(cct) << "error registering admin socket command: "
<< cpp_strerror(-ret) << dendl;
}
ret = admin_socket->register_command("dump_cache",
&m_command_hook,
"show in-memory metadata cache contents");
if (ret < 0) {
lderr(cct) << "error registering admin socket command: "
<< cpp_strerror(-ret) << dendl;
}
ret = admin_socket->register_command("kick_stale_sessions",
&m_command_hook,
"kick sessions that were remote reset");
if (ret < 0) {
lderr(cct) << "error registering admin socket command: "
<< cpp_strerror(-ret) << dendl;
}
ret = admin_socket->register_command("status",
&m_command_hook,
"show overall client status");
if (ret < 0) {
lderr(cct) << "error registering admin socket command: "
<< cpp_strerror(-ret) << dendl;
}
}
void Client::shutdown()
{
ldout(cct, 1) << __func__ << dendl;
// If we were not mounted, but were being used for sending
// MDS commands, we may have sessions that need closing.
{
std::scoped_lock l{client_lock};
// To make sure the tick thread will be stoppped before
// destructing the Client, just in case like the _mount()
// failed but didn't not get a chance to stop the tick
// thread
tick_thread_stopped = true;
upkeep_cond.notify_one();
_close_sessions();
}
cct->_conf.remove_observer(this);
cct->get_admin_socket()->unregister_commands(&m_command_hook);
if (ino_invalidate_cb) {
ldout(cct, 10) << "shutdown stopping cache invalidator finisher" << dendl;
async_ino_invalidator.wait_for_empty();
async_ino_invalidator.stop();
}
if (dentry_invalidate_cb) {
ldout(cct, 10) << "shutdown stopping dentry invalidator finisher" << dendl;
async_dentry_invalidator.wait_for_empty();
async_dentry_invalidator.stop();
}
if (switch_interrupt_cb) {
ldout(cct, 10) << "shutdown stopping interrupt finisher" << dendl;
interrupt_finisher.wait_for_empty();
interrupt_finisher.stop();
}
if (remount_cb) {
ldout(cct, 10) << "shutdown stopping remount finisher" << dendl;
remount_finisher.wait_for_empty();
remount_finisher.stop();
}
if (ino_release_cb) {
ldout(cct, 10) << "shutdown stopping inode release finisher" << dendl;
async_ino_releasor.wait_for_empty();
async_ino_releasor.stop();
}
objectcacher->stop(); // outside of client_lock! this does a join.
/*
* We are shuting down the client.
*
* Just declare the state to CLIENT_NEW to block and fail any
* new comming "reader" and then try to wait all the in-flight
* "readers" to finish.
*/
RWRef_t iref_writer(initialize_state, CLIENT_NEW, false);
if (!iref_writer.is_first_writer())
return;
iref_writer.wait_readers_done();
{
std::scoped_lock l(timer_lock);
timer.shutdown();
}
objecter_finisher.wait_for_empty();
objecter_finisher.stop();
if (logger) {
cct->get_perfcounters_collection()->remove(logger.get());
logger.reset();
}
}
void Client::update_io_stat_metadata(utime_t latency) {
auto lat_nsec = latency.to_nsec();
// old values are used to compute new ones
auto o_avg = logger->tget(l_c_md_avg).to_nsec();
auto o_sqsum = logger->get(l_c_md_sqsum);
auto n_avg = calc_average(o_avg, lat_nsec, nr_metadata_request);
auto n_sqsum = calc_sq_sum(o_sqsum, o_avg, n_avg, lat_nsec,
nr_metadata_request);
logger->tinc(l_c_lat, latency);
logger->tinc(l_c_reply, latency);
utime_t avg;
avg.set_from_double(n_avg / 1000000000);
logger->tset(l_c_md_avg, avg);
logger->set(l_c_md_sqsum, n_sqsum);
logger->set(l_c_md_ops, nr_metadata_request);
}
void Client::update_io_stat_read(utime_t latency) {
auto lat_nsec = latency.to_nsec();
// old values are used to compute new ones
auto o_avg = logger->tget(l_c_rd_avg).to_nsec();
auto o_sqsum = logger->get(l_c_rd_sqsum);
auto n_avg = calc_average(o_avg, lat_nsec, nr_read_request);
auto n_sqsum = calc_sq_sum(o_sqsum, o_avg, n_avg, lat_nsec,
nr_read_request);
logger->tinc(l_c_read, latency);
utime_t avg;
avg.set_from_double(n_avg / 1000000000);
logger->tset(l_c_rd_avg, avg);
logger->set(l_c_rd_sqsum, n_sqsum);
logger->set(l_c_rd_ops, nr_read_request);
}
void Client::update_io_stat_write(utime_t latency) {
auto lat_nsec = latency.to_nsec();
// old values are used to compute new ones
auto o_avg = logger->tget(l_c_wr_avg).to_nsec();
auto o_sqsum = logger->get(l_c_wr_sqsum);
auto n_avg = calc_average(o_avg, lat_nsec, nr_write_request);
auto n_sqsum = calc_sq_sum(o_sqsum, o_avg, n_avg, lat_nsec,
nr_write_request);
logger->tinc(l_c_wrlat, latency);
utime_t avg;
avg.set_from_double(n_avg / 1000000000);
logger->tset(l_c_wr_avg, avg);
logger->set(l_c_wr_sqsum, n_sqsum);
logger->set(l_c_wr_ops, nr_write_request);
}
// ===================
// metadata cache stuff
void Client::trim_cache(bool trim_kernel_dcache)
{
uint64_t max = cct->_conf->client_cache_size;
ldout(cct, 20) << "trim_cache size " << lru.lru_get_size() << " max " << max << dendl;
unsigned last = 0;
while (lru.lru_get_size() != last) {
last = lru.lru_get_size();
if (!is_unmounting() && lru.lru_get_size() <= max) break;
// trim!
Dentry *dn = static_cast<Dentry*>(lru.lru_get_next_expire());
if (!dn)
break; // done
trim_dentry(dn);
}
if (trim_kernel_dcache && lru.lru_get_size() > max)
_invalidate_kernel_dcache();
// hose root?
if (lru.lru_get_size() == 0 && root && root->get_nref() == 1 && inode_map.size() == 1 + root_parents.size()) {
ldout(cct, 15) << "trim_cache trimmed root " << root << dendl;
root.reset();
}
}
void Client::trim_cache_for_reconnect(MetaSession *s)
{
mds_rank_t mds = s->mds_num;
ldout(cct, 20) << __func__ << " mds." << mds << dendl;
int trimmed = 0;
list<Dentry*> skipped;
while (lru.lru_get_size() > 0) {
Dentry *dn = static_cast<Dentry*>(lru.lru_expire());
if (!dn)
break;
if ((dn->inode && dn->inode->caps.count(mds)) ||
dn->dir->parent_inode->caps.count(mds)) {
trim_dentry(dn);
trimmed++;
} else
skipped.push_back(dn);
}
for(list<Dentry*>::iterator p = skipped.begin(); p != skipped.end(); ++p)
lru.lru_insert_mid(*p);
ldout(cct, 20) << __func__ << " mds." << mds
<< " trimmed " << trimmed << " dentries" << dendl;
if (s->caps.size() > 0)
_invalidate_kernel_dcache();
}
void Client::trim_dentry(Dentry *dn)
{
ldout(cct, 15) << "trim_dentry unlinking dn " << dn->name
<< " in dir "
<< std::hex << dn->dir->parent_inode->ino << std::dec
<< dendl;
if (dn->inode) {
Inode *diri = dn->dir->parent_inode;
clear_dir_complete_and_ordered(diri, true);
}
unlink(dn, false, false); // drop dir, drop dentry
}
void Client::update_inode_file_size(Inode *in, int issued, uint64_t size,
uint64_t truncate_seq, uint64_t truncate_size)
{
uint64_t prior_size = in->size;
if (truncate_seq > in->truncate_seq ||
(truncate_seq == in->truncate_seq && size > in->size)) {
ldout(cct, 10) << "size " << in->size << " -> " << size << dendl;
in->size = size;
in->reported_size = size;
if (truncate_seq != in->truncate_seq) {
ldout(cct, 10) << "truncate_seq " << in->truncate_seq << " -> "
<< truncate_seq << dendl;
in->truncate_seq = truncate_seq;
in->oset.truncate_seq = truncate_seq;
// truncate cached file data
if (prior_size > size) {
_invalidate_inode_cache(in, truncate_size, prior_size - truncate_size);
}
}
// truncate inline data
if (in->inline_version < CEPH_INLINE_NONE) {
uint32_t len = in->inline_data.length();
if (size < len)
in->inline_data.splice(size, len - size);
}
}
if (truncate_seq >= in->truncate_seq &&
in->truncate_size != truncate_size) {
if (in->is_file()) {
ldout(cct, 10) << "truncate_size " << in->truncate_size << " -> "
<< truncate_size << dendl;
in->truncate_size = truncate_size;
in->oset.truncate_size = truncate_size;
} else {
ldout(cct, 0) << "Hmmm, truncate_seq && truncate_size changed on non-file inode!" << dendl;
}
}
}
void Client::update_inode_file_time(Inode *in, int issued, uint64_t time_warp_seq,
utime_t ctime, utime_t mtime, utime_t atime)
{
ldout(cct, 10) << __func__ << " " << *in << " " << ccap_string(issued)
<< " ctime " << ctime << " mtime " << mtime << dendl;
if (time_warp_seq > in->time_warp_seq)
ldout(cct, 10) << " mds time_warp_seq " << time_warp_seq
<< " is higher than local time_warp_seq "
<< in->time_warp_seq << dendl;
int warn = false;
// be careful with size, mtime, atime
if (issued & (CEPH_CAP_FILE_EXCL|
CEPH_CAP_FILE_WR|
CEPH_CAP_FILE_BUFFER|
CEPH_CAP_AUTH_EXCL|
CEPH_CAP_XATTR_EXCL)) {
ldout(cct, 30) << "Yay have enough caps to look at our times" << dendl;
if (ctime > in->ctime)
in->ctime = ctime;
if (time_warp_seq > in->time_warp_seq) {
//the mds updated times, so take those!
in->mtime = mtime;
in->atime = atime;
in->time_warp_seq = time_warp_seq;
} else if (time_warp_seq == in->time_warp_seq) {
//take max times
if (mtime > in->mtime)
in->mtime = mtime;
if (atime > in->atime)
in->atime = atime;
} else if (issued & CEPH_CAP_FILE_EXCL) {
//ignore mds values as we have a higher seq
} else warn = true;
} else {
ldout(cct, 30) << "Don't have enough caps, just taking mds' time values" << dendl;
if (time_warp_seq >= in->time_warp_seq) {
in->ctime = ctime;
in->mtime = mtime;
in->atime = atime;
in->time_warp_seq = time_warp_seq;
} else warn = true;
}
if (warn) {
ldout(cct, 0) << "WARNING: " << *in << " mds time_warp_seq "
<< time_warp_seq << " is lower than local time_warp_seq "
<< in->time_warp_seq
<< dendl;
}
}
void Client::_fragmap_remove_non_leaves(Inode *in)
{
for (map<frag_t,int>::iterator p = in->fragmap.begin(); p != in->fragmap.end(); )
if (!in->dirfragtree.is_leaf(p->first))
in->fragmap.erase(p++);
else
++p;
}
void Client::_fragmap_remove_stopped_mds(Inode *in, mds_rank_t mds)
{
for (auto p = in->fragmap.begin(); p != in->fragmap.end(); )
if (p->second == mds)
in->fragmap.erase(p++);
else
++p;
}
Inode * Client::add_update_inode(InodeStat *st, utime_t from,
MetaSession *session,
const UserPerm& request_perms)
{
Inode *in;
bool was_new = false;
if (inode_map.count(st->vino)) {
in = inode_map[st->vino];
ldout(cct, 12) << __func__ << " had " << *in << " caps " << ccap_string(st->cap.caps) << dendl;
} else {
in = new Inode(this, st->vino, &st->layout);