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1 | // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
2 | // vim: ts=8 sw=2 smarttab | |
3 | ||
4 | #ifndef CEPH_LIBRBD_CACHE_PWL_SSD_WRITE_LOG | |
5 | #define CEPH_LIBRBD_CACHE_PWL_SSD_WRITE_LOG | |
6 | ||
7 | #include "blk/BlockDevice.h" | |
8 | #include "common/AsyncOpTracker.h" | |
9 | #include "common/Checksummer.h" | |
10 | #include "common/environment.h" | |
11 | #include "common/RWLock.h" | |
12 | #include "common/WorkQueue.h" | |
13 | #include "librbd/BlockGuard.h" | |
14 | #include "librbd/Utils.h" | |
15 | #include "librbd/cache/ImageWriteback.h" | |
16 | #include "librbd/cache/Types.h" | |
17 | #include "librbd/cache/pwl/AbstractWriteLog.h" | |
18 | #include "librbd/cache/pwl/LogMap.h" | |
19 | #include "librbd/cache/pwl/LogOperation.h" | |
20 | #include "librbd/cache/pwl/Request.h" | |
21 | #include "librbd/cache/pwl/ssd/Builder.h" | |
22 | #include "librbd/cache/pwl/ssd/Types.h" | |
23 | #include <functional> | |
24 | #include <list> | |
25 | ||
26 | namespace librbd { | |
27 | ||
28 | struct ImageCtx; | |
29 | ||
30 | namespace cache { | |
31 | namespace pwl { | |
32 | namespace ssd { | |
33 | ||
34 | template <typename ImageCtxT> | |
35 | class WriteLog : public AbstractWriteLog<ImageCtxT> { | |
36 | public: | |
37 | WriteLog(ImageCtxT &image_ctx, | |
38 | librbd::cache::pwl::ImageCacheState<ImageCtxT>* cache_state, | |
39 | cache::ImageWritebackInterface& image_writeback, | |
40 | plugin::Api<ImageCtxT>& plugin_api); | |
41 | ~WriteLog(); | |
42 | WriteLog(const WriteLog&) = delete; | |
43 | WriteLog &operator=(const WriteLog&) = delete; | |
44 | ||
45 | typedef io::Extent Extent; | |
46 | using This = AbstractWriteLog<ImageCtxT>; | |
47 | using C_BlockIORequestT = pwl::C_BlockIORequest<This>; | |
48 | using C_WriteRequestT = pwl::C_WriteRequest<This>; | |
49 | using C_WriteSameRequestT = pwl::C_WriteSameRequest<This>; | |
50 | ||
51 | bool alloc_resources(C_BlockIORequestT *req) override; | |
52 | void setup_schedule_append( | |
53 | pwl::GenericLogOperationsVector &ops, bool do_early_flush, | |
54 | C_BlockIORequestT *req) override; | |
55 | void complete_user_request(Context *&user_req, int r) override; | |
56 | ||
57 | protected: | |
58 | using AbstractWriteLog<ImageCtxT>::m_lock; | |
59 | using AbstractWriteLog<ImageCtxT>::m_log_entries; | |
60 | using AbstractWriteLog<ImageCtxT>::m_image_ctx; | |
61 | using AbstractWriteLog<ImageCtxT>::m_cache_state; | |
62 | using AbstractWriteLog<ImageCtxT>::m_first_free_entry; | |
63 | using AbstractWriteLog<ImageCtxT>::m_first_valid_entry; | |
64 | using AbstractWriteLog<ImageCtxT>::m_bytes_allocated; | |
65 | ||
a4b75251 | 66 | bool initialize_pool(Context *on_finish, |
f67539c2 TL |
67 | pwl::DeferredContexts &later) override; |
68 | void process_work() override; | |
69 | void append_scheduled_ops(void) override; | |
a4b75251 | 70 | void schedule_append_ops(pwl::GenericLogOperations &ops, C_BlockIORequestT *req) override; |
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71 | void remove_pool_file() override; |
72 | void release_ram(std::shared_ptr<GenericLogEntry> log_entry) override; | |
73 | ||
74 | private: | |
75 | class AioTransContext { | |
76 | public: | |
77 | Context *on_finish; | |
78 | ::IOContext ioc; | |
79 | explicit AioTransContext(CephContext* cct, Context *cb) | |
80 | : on_finish(cb), ioc(cct, this) {} | |
81 | ||
82 | ~AioTransContext(){} | |
83 | ||
84 | void aio_finish() { | |
85 | on_finish->complete(ioc.get_return_value()); | |
86 | delete this; | |
87 | } | |
88 | }; //class AioTransContext | |
89 | ||
90 | struct WriteLogPoolRootUpdate { | |
91 | std::shared_ptr<pwl::WriteLogPoolRoot> root; | |
92 | Context *ctx; | |
93 | WriteLogPoolRootUpdate(std::shared_ptr<pwl::WriteLogPoolRoot> r, | |
94 | Context* c) | |
95 | : root(r), ctx(c) {} | |
96 | }; | |
97 | ||
98 | using WriteLogPoolRootUpdateList = std::list<std::shared_ptr<WriteLogPoolRootUpdate>>; | |
99 | WriteLogPoolRootUpdateList m_poolroot_to_update; /* pool root list to update to SSD */ | |
100 | bool m_updating_pool_root = false; | |
101 | ||
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102 | std::atomic<int> m_async_update_superblock = {0}; |
103 | BlockDevice *bdev = nullptr; | |
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104 | pwl::WriteLogPoolRoot pool_root; |
105 | Builder<This> *m_builderobj; | |
106 | ||
107 | Builder<This>* create_builder(); | |
a4b75251 | 108 | int create_and_open_bdev(); |
f67539c2 | 109 | void load_existing_entries(pwl::DeferredContexts &later); |
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110 | void inc_allocated_cached_bytes( |
111 | std::shared_ptr<pwl::GenericLogEntry> log_entry) override; | |
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112 | void collect_read_extents( |
113 | uint64_t read_buffer_offset, LogMapEntry<GenericWriteLogEntry> map_entry, | |
a4b75251 | 114 | std::vector<std::shared_ptr<GenericWriteLogEntry>> &log_entries_to_read, |
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115 | std::vector<bufferlist*> &bls_to_read, uint64_t entry_hit_length, |
116 | Extent hit_extent, pwl::C_ReadRequest *read_ctx) override; | |
117 | void complete_read( | |
a4b75251 | 118 | std::vector<std::shared_ptr<GenericWriteLogEntry>> &log_entries_to_read, |
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119 | std::vector<bufferlist*> &bls_to_read, Context *ctx) override; |
120 | void enlist_op_appender(); | |
121 | bool retire_entries(const unsigned long int frees_per_tx); | |
122 | bool has_sync_point_logs(GenericLogOperations &ops); | |
123 | void append_op_log_entries(GenericLogOperations &ops); | |
124 | void alloc_op_log_entries(GenericLogOperations &ops); | |
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125 | void construct_flush_entries(pwl::GenericLogEntries entires_to_flush, |
126 | DeferredContexts &post_unlock, | |
127 | bool has_write_entry) override; | |
f67539c2 | 128 | void append_ops(GenericLogOperations &ops, Context *ctx, |
a4b75251 | 129 | uint64_t* new_first_free_entry); |
f67539c2 | 130 | void write_log_entries(GenericLogEntriesVector log_entries, |
a4b75251 | 131 | AioTransContext *aio, uint64_t *pos); |
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132 | void schedule_update_root(std::shared_ptr<WriteLogPoolRoot> root, |
133 | Context *ctx); | |
134 | void enlist_op_update_root(); | |
135 | void update_root_scheduled_ops(); | |
136 | int update_pool_root_sync(std::shared_ptr<pwl::WriteLogPoolRoot> root); | |
137 | void update_pool_root(std::shared_ptr<WriteLogPoolRoot> root, | |
138 | AioTransContext *aio); | |
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139 | void aio_read_data_block(std::shared_ptr<GenericWriteLogEntry> log_entry, |
140 | bufferlist *bl, Context *ctx); | |
141 | void aio_read_data_blocks(std::vector<std::shared_ptr<GenericWriteLogEntry>> &log_entries, | |
142 | std::vector<bufferlist *> &bls, Context *ctx); | |
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143 | static void aio_cache_cb(void *priv, void *priv2) { |
144 | AioTransContext *c = static_cast<AioTransContext*>(priv2); | |
145 | c->aio_finish(); | |
146 | } | |
147 | };//class WriteLog | |
148 | ||
149 | } // namespace ssd | |
150 | } // namespace pwl | |
151 | } // namespace cache | |
152 | } // namespace librbd | |
153 | ||
154 | extern template class librbd::cache::pwl::ssd::WriteLog<librbd::ImageCtx>; | |
155 | ||
156 | #endif // CEPH_LIBRBD_CACHE_PWL_SSD_WRITE_LOG |