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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 18:24:20 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 18:24:20 +0000 |
commit | 483eb2f56657e8e7f419ab1a4fab8dce9ade8609 (patch) | |
tree | e5d88d25d870d5dedacb6bbdbe2a966086a0a5cf /src/mds/JournalPointer.cc | |
parent | Initial commit. (diff) | |
download | ceph-483eb2f56657e8e7f419ab1a4fab8dce9ade8609.tar.xz ceph-483eb2f56657e8e7f419ab1a4fab8dce9ade8609.zip |
Adding upstream version 14.2.21.upstream/14.2.21upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/mds/JournalPointer.cc')
-rw-r--r-- | src/mds/JournalPointer.cc | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/src/mds/JournalPointer.cc b/src/mds/JournalPointer.cc new file mode 100644 index 00000000..797798aa --- /dev/null +++ b/src/mds/JournalPointer.cc @@ -0,0 +1,122 @@ +// -*- 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. + * + */ + + +#include "common/debug.h" +#include "common/errno.h" +#include "common/Cond.h" +#include "osdc/Objecter.h" +#include "mds/mdstypes.h" +#include "msg/Messenger.h" + +#include "mds/JournalPointer.h" + + +#define dout_context g_ceph_context +#define dout_subsys ceph_subsys_journaler +#undef dout_prefix +#define dout_prefix *_dout << objecter->messenger->get_myname() << ".journalpointer " + + +std::string JournalPointer::get_object_id() const +{ + inodeno_t const pointer_ino = MDS_INO_LOG_POINTER_OFFSET + node_id; + char buf[32]; + snprintf(buf, sizeof(buf), "%llx.%08llx", (long long unsigned)pointer_ino, (long long unsigned)0); + + return std::string(buf); +} + + +/** + * Blocking read of JournalPointer for this MDS + */ +int JournalPointer::load(Objecter *objecter) +{ + ceph_assert(objecter != NULL); + + // Blocking read of data + std::string const object_id = get_object_id(); + dout(4) << "Reading journal pointer '" << object_id << "'" << dendl; + bufferlist data; + C_SaferCond waiter; + objecter->read_full(object_t(object_id), object_locator_t(pool_id), + CEPH_NOSNAP, &data, 0, &waiter); + int r = waiter.wait(); + + // Construct JournalPointer result, null or decoded data + if (r == 0) { + auto q = data.cbegin(); + try { + decode(q); + } catch (const buffer::error &e) { + return -EINVAL; + } + } else { + dout(1) << "Journal pointer '" << object_id << "' read failed: " << cpp_strerror(r) << dendl; + } + return r; +} + + +/** + * Blocking write of JournalPointer for this MDS + * + * @return objecter write op status code + */ +int JournalPointer::save(Objecter *objecter) const +{ + ceph_assert(objecter != NULL); + // It is not valid to persist a null pointer + ceph_assert(!is_null()); + + // Serialize JournalPointer object + bufferlist data; + encode(data); + + // Write to RADOS and wait for durability + std::string const object_id = get_object_id(); + dout(4) << "Writing pointer object '" << object_id << "': 0x" + << std::hex << front << ":0x" << back << std::dec << dendl; + + C_SaferCond waiter; + objecter->write_full(object_t(object_id), object_locator_t(pool_id), + SnapContext(), data, + ceph::real_clock::now(), 0, + &waiter); + int write_result = waiter.wait(); + if (write_result < 0) { + derr << "Error writing pointer object '" << object_id << "': " << cpp_strerror(write_result) << dendl; + } + return write_result; +} + + +/** + * Non-blocking variant of save() that assumes objecter lock already held by + * caller + */ +void JournalPointer::save(Objecter *objecter, Context *completion) const +{ + ceph_assert(objecter != NULL); + + bufferlist data; + encode(data); + + objecter->write_full(object_t(get_object_id()), object_locator_t(pool_id), + SnapContext(), data, + ceph::real_clock::now(), 0, + completion); +} + |