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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.
+ *
+ */
+
+#ifndef CEPH_MDS_EMETABLOB_H
+#define CEPH_MDS_EMETABLOB_H
+
+#include <string_view>
+
+#include "../CInode.h"
+#include "../CDir.h"
+#include "../CDentry.h"
+#include "../LogSegment.h"
+
+#include "include/interval_set.h"
+#include "common/strescape.h"
+
+class MDSRank;
+class MDLog;
+class LogSegment;
+struct MDPeerUpdate;
+
+/*
+ * a bunch of metadata in the journal
+ */
+
+/* notes:
+ *
+ * - make sure you adjust the inode.version for any modified inode you
+ * journal. CDir and CDentry maintain a projected_version, but CInode
+ * doesn't, since the journaled inode usually has to be modified
+ * manually anyway (to delay the change in the MDS's cache until after
+ * it is journaled).
+ *
+ */
+
+
+class EMetaBlob {
+
+public:
+ /* fullbit - a regular dentry + inode
+ *
+ * We encode this one a bit weirdly, just because (also, it's marginally faster
+ * on multiple encodes, which I think can happen):
+ * Encode a bufferlist on struct creation with all data members, without a struct_v.
+ * When encode is called, encode struct_v and then append the bufferlist.
+ * Decode straight into the appropriate variables.
+ *
+ * So, if you add members, encode them in the constructor and then change
+ * the struct_v in the encode function!
+ */
+ struct fullbit {
+ static const int STATE_DIRTY = (1<<0);
+ static const int STATE_DIRTYPARENT = (1<<1);
+ static const int STATE_DIRTYPOOL = (1<<2);
+ static const int STATE_NEED_SNAPFLUSH = (1<<3);
+ static const int STATE_EPHEMERAL_RANDOM = (1<<4);
+ std::string dn; // dentry
+ std::string alternate_name;
+ snapid_t dnfirst, dnlast;
+ version_t dnv{0};
+ CInode::inode_const_ptr inode; // if it's not XXX should not be part of mempool; wait for std::pmr to simplify
+ CInode::xattr_map_const_ptr xattrs;
+ fragtree_t dirfragtree;
+ std::string symlink;
+ snapid_t oldest_snap;
+ bufferlist snapbl;
+ __u8 state{0};
+ CInode::old_inode_map_const_ptr old_inodes; // XXX should not be part of mempool; wait for std::pmr to simplify
+
+ fullbit(std::string_view d, std::string_view an, snapid_t df, snapid_t dl,
+ version_t v, const CInode::inode_const_ptr& i, const fragtree_t &dft,
+ const CInode::xattr_map_const_ptr& xa, std::string_view sym,
+ snapid_t os, const bufferlist &sbl, __u8 st,
+ const CInode::old_inode_map_const_ptr& oi) :
+ dn(d), alternate_name(an), dnfirst(df), dnlast(dl), dnv(v), inode(i), xattrs(xa),
+ oldest_snap(os), state(st), old_inodes(oi)
+ {
+ if (i->is_symlink())
+ symlink = sym;
+ if (i->is_dir())
+ dirfragtree = dft;
+ snapbl = sbl;
+ }
+ explicit fullbit(bufferlist::const_iterator &p) {
+ decode(p);
+ }
+ fullbit() = default;
+ fullbit(const fullbit&) = delete;
+ ~fullbit() {}
+ fullbit& operator=(const fullbit&) = delete;
+
+ void encode(bufferlist& bl, uint64_t features) const;
+ void decode(bufferlist::const_iterator &bl);
+ void dump(Formatter *f) const;
+ static void generate_test_instances(std::list<EMetaBlob::fullbit*>& ls);
+
+ void update_inode(MDSRank *mds, CInode *in);
+ bool is_dirty() const { return (state & STATE_DIRTY); }
+ bool is_dirty_parent() const { return (state & STATE_DIRTYPARENT); }
+ bool is_dirty_pool() const { return (state & STATE_DIRTYPOOL); }
+ bool need_snapflush() const { return (state & STATE_NEED_SNAPFLUSH); }
+ bool is_export_ephemeral_random() const { return (state & STATE_EPHEMERAL_RANDOM); }
+
+ void print(ostream& out) const {
+ out << " fullbit dn " << dn << " [" << dnfirst << "," << dnlast << "] dnv " << dnv
+ << " inode " << inode->ino
+ << " state=" << state;
+ if (!alternate_name.empty()) {
+ out << " altn " << binstrprint(alternate_name, 8);
+ }
+ out << std::endl;
+ }
+ string state_string() const {
+ string state_string;
+ bool marked_already = false;
+ if (is_dirty()) {
+ state_string.append("dirty");
+ marked_already = true;
+ }
+ if (is_dirty_parent()) {
+ state_string.append(marked_already ? "+dirty_parent" : "dirty_parent");
+ if (is_dirty_pool())
+ state_string.append("+dirty_pool");
+ }
+ return state_string;
+ }
+ };
+ WRITE_CLASS_ENCODER_FEATURES(fullbit)
+
+ /* remotebit - a dentry + remote inode link (i.e. just an ino)
+ */
+ struct remotebit {
+ std::string dn;
+ std::string alternate_name;
+ snapid_t dnfirst = 0, dnlast = 0;
+ version_t dnv = 0;
+ inodeno_t ino = 0;
+ unsigned char d_type = '\0';
+ bool dirty = false;
+
+ remotebit(std::string_view d, std::string_view an, snapid_t df, snapid_t dl, version_t v, inodeno_t i, unsigned char dt, bool dr) :
+ dn(d), alternate_name(an), dnfirst(df), dnlast(dl), dnv(v), ino(i), d_type(dt), dirty(dr) { }
+ explicit remotebit(bufferlist::const_iterator &p) { decode(p); }
+ remotebit() = default;
+
+ void encode(bufferlist& bl) const;
+ void decode(bufferlist::const_iterator &bl);
+ void print(ostream& out) const {
+ out << " remotebit dn " << dn << " [" << dnfirst << "," << dnlast << "] dnv " << dnv
+ << " ino " << ino
+ << " dirty=" << dirty;
+ if (!alternate_name.empty()) {
+ out << " altn " << binstrprint(alternate_name, 8);
+ }
+ out << std::endl;
+ }
+ void dump(Formatter *f) const;
+ static void generate_test_instances(std::list<remotebit*>& ls);
+ };
+ WRITE_CLASS_ENCODER(remotebit)
+
+ /*
+ * nullbit - a null dentry
+ */
+ struct nullbit {
+ std::string dn;
+ snapid_t dnfirst, dnlast;
+ version_t dnv;
+ bool dirty;
+
+ nullbit(std::string_view d, snapid_t df, snapid_t dl, version_t v, bool dr) :
+ dn(d), dnfirst(df), dnlast(dl), dnv(v), dirty(dr) { }
+ explicit nullbit(bufferlist::const_iterator &p) { decode(p); }
+ nullbit(): dnfirst(0), dnlast(0), dnv(0), dirty(false) {}
+
+ void encode(bufferlist& bl) const;
+ void decode(bufferlist::const_iterator &bl);
+ void dump(Formatter *f) const;
+ static void generate_test_instances(std::list<nullbit*>& ls);
+ void print(ostream& out) const {
+ out << " nullbit dn " << dn << " [" << dnfirst << "," << dnlast << "] dnv " << dnv
+ << " dirty=" << dirty << std::endl;
+ }
+ };
+ WRITE_CLASS_ENCODER(nullbit)
+
+
+ /* dirlump - contains metadata for any dir we have contents for.
+ */
+public:
+ struct dirlump {
+ static const int STATE_COMPLETE = (1<<1);
+ static const int STATE_DIRTY = (1<<2); // dirty due to THIS journal item, that is!
+ static const int STATE_NEW = (1<<3); // new directory
+ static const int STATE_IMPORTING = (1<<4); // importing directory
+ static const int STATE_DIRTYDFT = (1<<5); // dirty dirfragtree
+
+ //version_t dirv;
+ CDir::fnode_const_ptr fnode;
+ __u32 state;
+ __u32 nfull, nremote, nnull;
+
+ private:
+ mutable bufferlist dnbl;
+ mutable bool dn_decoded;
+ mutable list<fullbit> dfull;
+ mutable vector<remotebit> dremote;
+ mutable vector<nullbit> dnull;
+
+ public:
+ dirlump() : state(0), nfull(0), nremote(0), nnull(0), dn_decoded(true) { }
+ dirlump(const dirlump&) = delete;
+ dirlump& operator=(const dirlump&) = delete;
+
+ bool is_complete() const { return state & STATE_COMPLETE; }
+ void mark_complete() { state |= STATE_COMPLETE; }
+ bool is_dirty() const { return state & STATE_DIRTY; }
+ void mark_dirty() { state |= STATE_DIRTY; }
+ bool is_new() const { return state & STATE_NEW; }
+ void mark_new() { state |= STATE_NEW; }
+ bool is_importing() { return state & STATE_IMPORTING; }
+ void mark_importing() { state |= STATE_IMPORTING; }
+ bool is_dirty_dft() { return state & STATE_DIRTYDFT; }
+ void mark_dirty_dft() { state |= STATE_DIRTYDFT; }
+
+ const list<fullbit> &get_dfull() const { return dfull; }
+ list<fullbit> &_get_dfull() { return dfull; }
+ const vector<remotebit> &get_dremote() const { return dremote; }
+ const vector<nullbit> &get_dnull() const { return dnull; }
+
+ template< class... Args>
+ void add_dfull(Args&&... args) {
+ dfull.emplace_back(std::forward<Args>(args)...);
+ }
+ template< class... Args>
+ void add_dremote(Args&&... args) {
+ dremote.emplace_back(std::forward<Args>(args)...);
+ }
+ template< class... Args>
+ void add_dnull(Args&&... args) {
+ dnull.emplace_back(std::forward<Args>(args)...);
+ }
+
+ void print(dirfrag_t dirfrag, ostream& out) const {
+ out << "dirlump " << dirfrag << " v " << fnode->version
+ << " state " << state
+ << " num " << nfull << "/" << nremote << "/" << nnull
+ << std::endl;
+ _decode_bits();
+ for (const auto& p : dfull)
+ p.print(out);
+ for (const auto& p : dremote)
+ p.print(out);
+ for (const auto& p : dnull)
+ p.print(out);
+ }
+
+ string state_string() const {
+ string state_string;
+ bool marked_already = false;
+ if (is_complete()) {
+ state_string.append("complete");
+ marked_already = true;
+ }
+ if (is_dirty()) {
+ state_string.append(marked_already ? "+dirty" : "dirty");
+ marked_already = true;
+ }
+ if (is_new()) {
+ state_string.append(marked_already ? "+new" : "new");
+ }
+ return state_string;
+ }
+
+ // if this changes, update the versioning in encode for it!
+ void _encode_bits(uint64_t features) const {
+ using ceph::encode;
+ if (!dn_decoded) return;
+ encode(dfull, dnbl, features);
+ encode(dremote, dnbl);
+ encode(dnull, dnbl);
+ }
+ void _decode_bits() const {
+ using ceph::decode;
+ if (dn_decoded) return;
+ auto p = dnbl.cbegin();
+ decode(dfull, p);
+ decode(dremote, p);
+ decode(dnull, p);
+ dn_decoded = true;
+ }
+
+ void encode(bufferlist& bl, uint64_t features) const;
+ void decode(bufferlist::const_iterator &bl);
+ void dump(Formatter *f) const;
+ static void generate_test_instances(std::list<dirlump*>& ls);
+ };
+ WRITE_CLASS_ENCODER_FEATURES(dirlump)
+
+ // my lumps. preserve the order we added them in a list.
+ vector<dirfrag_t> lump_order;
+ map<dirfrag_t, dirlump> lump_map;
+ list<fullbit> roots;
+public:
+ vector<pair<__u8,version_t> > table_tids; // tableclient transactions
+
+ inodeno_t opened_ino;
+public:
+ inodeno_t renamed_dirino;
+ vector<frag_t> renamed_dir_frags;
+private:
+
+ // ino (pre)allocation. may involve both inotable AND session state.
+ version_t inotablev, sessionmapv;
+ inodeno_t allocated_ino; // inotable
+ interval_set<inodeno_t> preallocated_inos; // inotable + session
+ inodeno_t used_preallocated_ino; // session
+ entity_name_t client_name; // session
+
+ // inodes i've truncated
+ vector<inodeno_t> truncate_start; // start truncate
+ map<inodeno_t, LogSegment::seq_t> truncate_finish; // finished truncate (started in segment blah)
+
+public:
+ vector<inodeno_t> destroyed_inodes;
+private:
+
+ // idempotent op(s)
+ vector<pair<metareqid_t,uint64_t> > client_reqs;
+ vector<pair<metareqid_t,uint64_t> > client_flushes;
+
+ public:
+ void encode(bufferlist& bl, uint64_t features) const;
+ void decode(bufferlist::const_iterator& bl);
+ void get_inodes(std::set<inodeno_t> &inodes) const;
+ void get_paths(std::vector<std::string> &paths) const;
+ void get_dentries(std::map<dirfrag_t, std::set<std::string> > &dentries) const;
+ entity_name_t get_client_name() const {return client_name;}
+
+ void dump(Formatter *f) const;
+ static void generate_test_instances(std::list<EMetaBlob*>& ls);
+ // soft stateadd
+ uint64_t last_subtree_map;
+ uint64_t event_seq;
+
+ // for replay, in certain cases
+ //LogSegment *_segment;
+
+ EMetaBlob() : opened_ino(0), renamed_dirino(0),
+ inotablev(0), sessionmapv(0), allocated_ino(0),
+ last_subtree_map(0), event_seq(0)
+ {}
+ EMetaBlob(const EMetaBlob&) = delete;
+ ~EMetaBlob() { }
+ EMetaBlob& operator=(const EMetaBlob&) = delete;
+
+ void print(ostream& out) {
+ for (const auto &p : lump_order)
+ lump_map[p].print(p, out);
+ }
+
+ void add_client_req(metareqid_t r, uint64_t tid=0) {
+ client_reqs.push_back(pair<metareqid_t,uint64_t>(r, tid));
+ }
+ void add_client_flush(metareqid_t r, uint64_t tid=0) {
+ client_flushes.push_back(pair<metareqid_t,uint64_t>(r, tid));
+ }
+
+ void add_table_transaction(int table, version_t tid) {
+ table_tids.push_back(pair<__u8, version_t>(table, tid));
+ }
+
+ void add_opened_ino(inodeno_t ino) {
+ ceph_assert(!opened_ino);
+ opened_ino = ino;
+ }
+
+ void set_ino_alloc(inodeno_t alloc,
+ inodeno_t used_prealloc,
+ interval_set<inodeno_t>& prealloc,
+ entity_name_t client,
+ version_t sv, version_t iv) {
+ allocated_ino = alloc;
+ used_preallocated_ino = used_prealloc;
+ preallocated_inos = prealloc;
+ client_name = client;
+ sessionmapv = sv;
+ inotablev = iv;
+ }
+
+ void add_truncate_start(inodeno_t ino) {
+ truncate_start.push_back(ino);
+ }
+ void add_truncate_finish(inodeno_t ino, uint64_t segoff) {
+ truncate_finish[ino] = segoff;
+ }
+
+ bool rewrite_truncate_finish(MDSRank const *mds, std::map<uint64_t, uint64_t> const &old_to_new);
+
+ void add_destroyed_inode(inodeno_t ino) {
+ destroyed_inodes.push_back(ino);
+ }
+
+ void add_null_dentry(CDentry *dn, bool dirty) {
+ add_null_dentry(add_dir(dn->get_dir(), false), dn, dirty);
+ }
+ void add_null_dentry(dirlump& lump, CDentry *dn, bool dirty) {
+ // add the dir
+ lump.nnull++;
+ lump.add_dnull(dn->get_name(), dn->first, dn->last,
+ dn->get_projected_version(), dirty);
+ }
+
+ void add_remote_dentry(CDentry *dn, bool dirty) {
+ add_remote_dentry(add_dir(dn->get_dir(), false), dn, dirty, 0, 0);
+ }
+ void add_remote_dentry(CDentry *dn, bool dirty, inodeno_t rino, int rdt) {
+ add_remote_dentry(add_dir(dn->get_dir(), false), dn, dirty, rino, rdt);
+ }
+ void add_remote_dentry(dirlump& lump, CDentry *dn, bool dirty,
+ inodeno_t rino=0, unsigned char rdt=0) {
+ if (!rino) {
+ rino = dn->get_projected_linkage()->get_remote_ino();
+ rdt = dn->get_projected_linkage()->get_remote_d_type();
+ }
+ lump.nremote++;
+ lump.add_dremote(dn->get_name(), dn->get_alternate_name(), dn->first, dn->last,
+ dn->get_projected_version(), rino, rdt, dirty);
+ }
+
+ // return remote pointer to to-be-journaled inode
+ void add_primary_dentry(CDentry *dn, CInode *in, bool dirty,
+ bool dirty_parent=false, bool dirty_pool=false,
+ bool need_snapflush=false) {
+ __u8 state = 0;
+ if (dirty) state |= fullbit::STATE_DIRTY;
+ if (dirty_parent) state |= fullbit::STATE_DIRTYPARENT;
+ if (dirty_pool) state |= fullbit::STATE_DIRTYPOOL;
+ if (need_snapflush) state |= fullbit::STATE_NEED_SNAPFLUSH;
+ add_primary_dentry(add_dir(dn->get_dir(), false), dn, in, state);
+ }
+ void add_primary_dentry(dirlump& lump, CDentry *dn, CInode *in, __u8 state) {
+ if (!in)
+ in = dn->get_projected_linkage()->get_inode();
+
+ if (in->is_ephemeral_rand()) {
+ state |= fullbit::STATE_EPHEMERAL_RANDOM;
+ }
+
+ const auto& pi = in->get_projected_inode();
+ ceph_assert(pi->version > 0);
+
+ if ((state & fullbit::STATE_DIRTY) && pi->is_backtrace_updated())
+ state |= fullbit::STATE_DIRTYPARENT;
+
+ bufferlist snapbl;
+ const sr_t *sr = in->get_projected_srnode();
+ if (sr)
+ sr->encode(snapbl);
+
+ lump.nfull++;
+ lump.add_dfull(dn->get_name(), dn->get_alternate_name(), dn->first, dn->last, dn->get_projected_version(),
+ pi, in->dirfragtree, in->get_projected_xattrs(), in->symlink,
+ in->oldest_snap, snapbl, state, in->get_old_inodes());
+
+ // make note of where this inode was last journaled
+ in->last_journaled = event_seq;
+ //cout << "journaling " << in->inode.ino << " at " << my_offset << std::endl;
+ }
+
+ // convenience: primary or remote? figure it out.
+ void add_dentry(CDentry *dn, bool dirty) {
+ dirlump& lump = add_dir(dn->get_dir(), false);
+ add_dentry(lump, dn, dirty, false, false);
+ }
+ void add_import_dentry(CDentry *dn) {
+ bool dirty_parent = false;
+ bool dirty_pool = false;
+ if (dn->get_linkage()->is_primary()) {
+ dirty_parent = dn->get_linkage()->get_inode()->is_dirty_parent();
+ dirty_pool = dn->get_linkage()->get_inode()->is_dirty_pool();
+ }
+ dirlump& lump = add_dir(dn->get_dir(), false);
+ add_dentry(lump, dn, dn->is_dirty(), dirty_parent, dirty_pool);
+ }
+ void add_dentry(dirlump& lump, CDentry *dn, bool dirty, bool dirty_parent, bool dirty_pool) {
+ // primary or remote
+ if (dn->get_projected_linkage()->is_remote()) {
+ add_remote_dentry(dn, dirty);
+ return;
+ } else if (dn->get_projected_linkage()->is_null()) {
+ add_null_dentry(dn, dirty);
+ return;
+ }
+ ceph_assert(dn->get_projected_linkage()->is_primary());
+ add_primary_dentry(dn, 0, dirty, dirty_parent, dirty_pool);
+ }
+
+ void add_root(bool dirty, CInode *in) {
+ in->last_journaled = event_seq;
+ //cout << "journaling " << in->inode.ino << " at " << my_offset << std::endl;
+
+ const auto& pi = in->get_projected_inode();
+ const auto& px = in->get_projected_xattrs();
+ const auto& pdft = in->dirfragtree;
+
+ bufferlist snapbl;
+ const sr_t *sr = in->get_projected_srnode();
+ if (sr)
+ sr->encode(snapbl);
+
+ for (auto p = roots.begin(); p != roots.end(); ++p) {
+ if (p->inode->ino == in->ino()) {
+ roots.erase(p);
+ break;
+ }
+ }
+
+ string empty;
+ roots.emplace_back(empty, "", in->first, in->last, 0, pi, pdft, px, in->symlink,
+ in->oldest_snap, snapbl, (dirty ? fullbit::STATE_DIRTY : 0),
+ in->get_old_inodes());
+ }
+
+ dirlump& add_dir(CDir *dir, bool dirty, bool complete=false) {
+ return add_dir(dir->dirfrag(), dir->get_projected_fnode(),
+ dirty, complete);
+ }
+ dirlump& add_new_dir(CDir *dir) {
+ return add_dir(dir->dirfrag(), dir->get_projected_fnode(),
+ true, true, true); // dirty AND complete AND new
+ }
+ dirlump& add_import_dir(CDir *dir) {
+ // dirty=false would be okay in some cases
+ return add_dir(dir->dirfrag(), dir->get_projected_fnode(),
+ dir->is_dirty(), dir->is_complete(), false, true, dir->is_dirty_dft());
+ }
+ dirlump& add_fragmented_dir(CDir *dir, bool dirty, bool dirtydft) {
+ return add_dir(dir->dirfrag(), dir->get_projected_fnode(),
+ dirty, false, false, false, dirtydft);
+ }
+ dirlump& add_dir(dirfrag_t df, const CDir::fnode_const_ptr& pf, bool dirty,
+ bool complete=false, bool isnew=false,
+ bool importing=false, bool dirty_dft=false) {
+ if (lump_map.count(df) == 0)
+ lump_order.push_back(df);
+
+ dirlump& l = lump_map[df];
+ l.fnode = pf;
+ if (complete) l.mark_complete();
+ if (dirty) l.mark_dirty();
+ if (isnew) l.mark_new();
+ if (importing) l.mark_importing();
+ if (dirty_dft) l.mark_dirty_dft();
+ return l;
+ }
+
+ static const int TO_AUTH_SUBTREE_ROOT = 0; // default.
+ static const int TO_ROOT = 1;
+
+ void add_dir_context(CDir *dir, int mode = TO_AUTH_SUBTREE_ROOT);
+
+ bool empty() {
+ return roots.empty() && lump_order.empty() && table_tids.empty() &&
+ truncate_start.empty() && truncate_finish.empty() &&
+ destroyed_inodes.empty() && client_reqs.empty() &&
+ opened_ino == 0 && inotablev == 0 && sessionmapv == 0;
+ }
+
+ void print(ostream& out) const {
+ out << "[metablob";
+ if (!lump_order.empty())
+ out << " " << lump_order.front() << ", " << lump_map.size() << " dirs";
+ if (!table_tids.empty())
+ out << " table_tids=" << table_tids;
+ if (allocated_ino || preallocated_inos.size()) {
+ if (allocated_ino)
+ out << " alloc_ino=" << allocated_ino;
+ if (preallocated_inos.size())
+ out << " prealloc_ino=" << preallocated_inos;
+ if (used_preallocated_ino)
+ out << " used_prealloc_ino=" << used_preallocated_ino;
+ out << " v" << inotablev;
+ }
+ out << "]";
+ }
+
+ void update_segment(LogSegment *ls);
+ void replay(MDSRank *mds, LogSegment *ls, MDPeerUpdate *su=NULL);
+};
+WRITE_CLASS_ENCODER_FEATURES(EMetaBlob)
+WRITE_CLASS_ENCODER_FEATURES(EMetaBlob::fullbit)
+WRITE_CLASS_ENCODER(EMetaBlob::remotebit)
+WRITE_CLASS_ENCODER(EMetaBlob::nullbit)
+WRITE_CLASS_ENCODER_FEATURES(EMetaBlob::dirlump)
+
+inline ostream& operator<<(ostream& out, const EMetaBlob& t) {
+ t.print(out);
+ return out;
+}
+
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-29 07:38:35 +0000