mirror of
https://github.com/ceph/ceph
synced 2025-01-07 03:31:36 +00:00
551d7eae12
IO is fully flushed before releasing the exclusive lock so holding the owner_lock isn't required. Signed-off-by: Jason Dillaman <dillaman@redhat.com>
71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
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// vim: ts=8 sw=2 smarttab
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#ifndef CEPH_LIBRBD_LIBRBDWRITEBACKHANDLER_H
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#define CEPH_LIBRBD_LIBRBDWRITEBACKHANDLER_H
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#include <queue>
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#include "common/snap_types.h"
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#include "osd/osd_types.h"
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#include "osdc/WritebackHandler.h"
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class Mutex;
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class Context;
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namespace librbd {
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struct ImageCtx;
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class LibrbdWriteback : public WritebackHandler {
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public:
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LibrbdWriteback(ImageCtx *ictx, Mutex& lock);
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// Note that oloc, trunc_size, and trunc_seq are ignored
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virtual void read(const object_t& oid, uint64_t object_no,
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const object_locator_t& oloc, uint64_t off, uint64_t len,
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snapid_t snapid, bufferlist *pbl, uint64_t trunc_size,
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__u32 trunc_seq, int op_flags, Context *onfinish);
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// Determine whether a read to this extent could be affected by a
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// write-triggered copy-on-write
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virtual bool may_copy_on_write(const object_t& oid, uint64_t read_off,
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uint64_t read_len, snapid_t snapid);
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// Note that oloc, trunc_size, and trunc_seq are ignored
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virtual ceph_tid_t write(const object_t& oid, const object_locator_t& oloc,
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uint64_t off, uint64_t len,
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const SnapContext& snapc, const bufferlist &bl,
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ceph::real_time mtime, uint64_t trunc_size,
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__u32 trunc_seq, ceph_tid_t journal_tid,
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Context *oncommit);
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using WritebackHandler::write;
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virtual void overwrite_extent(const object_t& oid, uint64_t off,
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uint64_t len, ceph_tid_t original_journal_tid,
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ceph_tid_t new_journal_tid);
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struct write_result_d {
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bool done;
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int ret;
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std::string oid;
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Context *oncommit;
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write_result_d(const std::string& oid, Context *oncommit) :
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done(false), ret(0), oid(oid), oncommit(oncommit) {}
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private:
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write_result_d(const write_result_d& rhs);
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const write_result_d& operator=(const write_result_d& rhs);
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};
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private:
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void complete_writes(const std::string& oid);
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ceph_tid_t m_tid;
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Mutex& m_lock;
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librbd::ImageCtx *m_ictx;
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ceph::unordered_map<std::string, std::queue<write_result_d*> > m_writes;
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friend class C_OrderedWrite;
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};
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}
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#endif
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