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| -rw-r--r-- | storage/innobase/include/fil0fil.h | 1799 |
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diff --git a/storage/innobase/include/fil0fil.h b/storage/innobase/include/fil0fil.h new file mode 100644 index 00000000..57b10351 --- /dev/null +++ b/storage/innobase/include/fil0fil.h @@ -0,0 +1,1799 @@ +/***************************************************************************** + +Copyright (c) 1995, 2017, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 2013, 2021, MariaDB Corporation. + +This program is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free Software +Foundation; version 2 of the License. + +This program is distributed in the hope that it will be useful, but WITHOUT +ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. + +You should have received a copy of the GNU General Public License along with +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA + +*****************************************************************************/ + +/**************************************************//** +@file include/fil0fil.h +The low-level file system + +Created 10/25/1995 Heikki Tuuri +*******************************************************/ + +#ifndef fil0fil_h +#define fil0fil_h + +#include "fsp0types.h" +#include "mach0data.h" +#include "assume_aligned.h" + +#ifndef UNIV_INNOCHECKSUM + +#include "buf0dblwr.h" +#include "hash0hash.h" +#include "log0recv.h" +#include "dict0types.h" +#include "ilist.h" +#include <set> +#include <mutex> + +struct unflushed_spaces_tag_t; +struct rotation_list_tag_t; + +// Forward declaration +extern my_bool srv_use_doublewrite_buf; + +/** Possible values of innodb_flush_method */ +enum srv_flush_t +{ + /** fsync, the default */ + SRV_FSYNC= 0, + /** open log files in O_DSYNC mode */ + SRV_O_DSYNC, + /** do not call os_file_flush() when writing data files, but do flush + after writing to log files */ + SRV_LITTLESYNC, + /** do not flush after writing */ + SRV_NOSYNC, + /** invoke os_file_set_nocache() on data files. This implies using + non-buffered IO but still using fsync, the reason for which is that + some FS do not flush meta-data when unbuffered IO happens */ + SRV_O_DIRECT, + /** do not use fsync() when using direct IO i.e.: it can be set to + avoid the fsync() call that we make when using SRV_UNIX_O_DIRECT. + However, in this case user/DBA should be sure about the integrity of + the meta-data */ + SRV_O_DIRECT_NO_FSYNC +#ifdef _WIN32 + /** Traditional Windows appoach to open all files without caching, + and do FileFlushBuffers() */ + ,SRV_ALL_O_DIRECT_FSYNC +#endif +}; + +/** innodb_flush_method */ +extern ulong srv_file_flush_method; + +/** Undo tablespaces starts with space_id. */ +extern ulint srv_undo_space_id_start; +/** The number of UNDO tablespaces that are open and ready to use. */ +extern ulint srv_undo_tablespaces_open; + +/** Check whether given space id is undo tablespace id +@param[in] space_id space id to check +@return true if it is undo tablespace else false. */ +inline bool srv_is_undo_tablespace(ulint space_id) +{ + return srv_undo_space_id_start > 0 && + space_id >= srv_undo_space_id_start && + space_id < srv_undo_space_id_start + srv_undo_tablespaces_open; +} + +class page_id_t; + +/** Structure containing encryption specification */ +struct fil_space_crypt_t; + +/** File types */ +enum fil_type_t { + /** temporary tablespace (temporary undo log or tables) */ + FIL_TYPE_TEMPORARY, + /** a tablespace that is being imported (no logging until finished) */ + FIL_TYPE_IMPORT, + /** persistent tablespace (for system, undo log or tables) */ + FIL_TYPE_TABLESPACE, +}; + +struct fil_node_t; + +/** Structure to store first and last value of range */ +struct range_t +{ + uint32_t first; + uint32_t last; +}; + +/** Sort the range based on first value of the range */ +struct range_compare +{ + bool operator() (const range_t lhs, const range_t rhs) const + { + return lhs.first < rhs.first; + } +}; + +using range_set_t= std::set<range_t, range_compare>; +/** Range to store the set of ranges of integers */ +class range_set +{ +private: + range_set_t ranges; + + range_set_t::iterator find(uint32_t value) const + { + auto r_offset= ranges.lower_bound({value, value}); + const auto r_end= ranges.end(); + if (r_offset != r_end); + else if (empty()) + return r_end; + else + r_offset= std::prev(r_end); + if (r_offset->first <= value && r_offset->last >= value) + return r_offset; + return r_end; + } +public: + /** Merge the current range with previous range. + @param[in] range range to be merged + @param[in] prev_range range to be merged with next */ + void merge_range(range_set_t::iterator range, + range_set_t::iterator prev_range) + { + if (range->first != prev_range->last + 1) + return; + + /* Merge the current range with previous range */ + range_t new_range {prev_range->first, range->last}; + ranges.erase(prev_range); + ranges.erase(range); + ranges.emplace(new_range); + } + + /** Split the range and add two more ranges + @param[in] range range to be split + @param[in] value Value to be removed from range */ + void split_range(range_set_t::iterator range, uint32_t value) + { + range_t split1{range->first, value - 1}; + range_t split2{value + 1, range->last}; + + /* Remove the existing element */ + ranges.erase(range); + + /* Insert the two elements */ + ranges.emplace(split1); + ranges.emplace(split2); + } + + /** Remove the value with the given range + @param[in,out] range range to be changed + @param[in] value value to be removed */ + void remove_within_range(range_set_t::iterator range, uint32_t value) + { + range_t new_range{range->first, range->last}; + if (value == range->first) + { + if (range->first == range->last) + { + ranges.erase(range); + return; + } + else + new_range.first++; + } + else if (value == range->last) + new_range.last--; + else if (range->first < value && range->last > value) + return split_range(range, value); + + ranges.erase(range); + ranges.emplace(new_range); + } + + /** Remove the value from the ranges. + @param[in] value Value to be removed. */ + void remove_value(uint32_t value) + { + if (empty()) + return; + range_t new_range {value, value}; + range_set_t::iterator range= ranges.lower_bound(new_range); + if (range == ranges.end()) + return remove_within_range(std::prev(range), value); + + if (range->first > value && range != ranges.begin()) + /* Iterate the previous ranges to delete */ + return remove_within_range(std::prev(range), value); + return remove_within_range(range, value); + } + /** Add the value within the existing range + @param[in] range range to be modified + @param[in] value value to be added */ + range_set_t::iterator add_within_range(range_set_t::iterator range, + uint32_t value) + { + if (range->first <= value && range->last >= value) + return range; + + range_t new_range{range->first, range->last}; + if (range->last + 1 == value) + new_range.last++; + else if (range->first - 1 == value) + new_range.first--; + else return ranges.end(); + ranges.erase(range); + return ranges.emplace(new_range).first; + } + /** Add the range in the ranges set + @param[in] new_range range to be added */ + void add_range(range_t new_range) + { + auto r_offset= ranges.lower_bound(new_range); + auto r_begin= ranges.begin(); + auto r_end= ranges.end(); + if (!ranges.size()) + { +new_range: + ranges.emplace(new_range); + return; + } + + if (r_offset == r_end) + { + /* last range */ + if (add_within_range(std::prev(r_offset), new_range.first) == r_end) + goto new_range; + } + else if (r_offset == r_begin) + { + /* First range */ + if (add_within_range(r_offset, new_range.first) == r_end) + goto new_range; + } + else if (r_offset->first - 1 == new_range.first) + { + /* Change starting of the existing range */ + auto r_value= add_within_range(r_offset, new_range.first); + if (r_value != ranges.begin()) + merge_range(r_value, std::prev(r_value)); + } + else + { + /* previous range last_value alone */ + if (add_within_range(std::prev(r_offset), new_range.first) == r_end) + goto new_range; + } + } + + /** Add the value in the ranges + @param[in] value value to be added */ + void add_value(uint32_t value) + { + range_t new_range{value, value}; + add_range(new_range); + } + + bool remove_if_exists(uint32_t value) + { + auto r_offset= find(value); + if (r_offset != ranges.end()) + { + remove_within_range(r_offset, value); + return true; + } + return false; + } + + bool contains(uint32_t value) const + { + return find(value) != ranges.end(); + } + + ulint size() { return ranges.size(); } + void clear() { ranges.clear(); } + bool empty() const { return ranges.empty(); } + typename range_set_t::iterator begin() { return ranges.begin(); } + typename range_set_t::iterator end() { return ranges.end(); } +}; +#endif + +/** Tablespace or log data space */ +#ifndef UNIV_INNOCHECKSUM +struct fil_io_t +{ + /** error code */ + dberr_t err; + /** file; node->space->release() must follow IORequestRead call */ + fil_node_t *node; +}; + +/** Tablespace encryption mode */ +enum fil_encryption_t +{ + /** Encrypted if innodb_encrypt_tables=ON (srv_encrypt_tables) */ + FIL_ENCRYPTION_DEFAULT, + /** Encrypted */ + FIL_ENCRYPTION_ON, + /** Not encrypted */ + FIL_ENCRYPTION_OFF +}; + +struct fil_space_t final : + ilist_node<unflushed_spaces_tag_t>, ilist_node<rotation_list_tag_t> +#else +struct fil_space_t final +#endif +{ +#ifndef UNIV_INNOCHECKSUM + friend fil_node_t; + ulint id; /*!< space id */ + hash_node_t hash; /*!< hash chain node */ + char* name; /*!< Tablespace name */ + lsn_t max_lsn; + /*!< LSN of the most recent + fil_names_write_if_was_clean(). + Reset to 0 by fil_names_clear(). + Protected by log_sys.mutex. + If and only if this is nonzero, the + tablespace will be in named_spaces. */ + /** whether undo tablespace truncation is in progress */ + bool is_being_truncated; + fil_type_t purpose;/*!< purpose */ + UT_LIST_BASE_NODE_T(fil_node_t) chain; + /*!< base node for the file chain */ + uint32_t size; /*!< tablespace file size in pages; + 0 if not known yet */ + uint32_t size_in_header; + /* FSP_SIZE in the tablespace header; + 0 if not known yet */ + uint32_t free_len; + /*!< length of the FSP_FREE list */ + uint32_t free_limit; + /*!< contents of FSP_FREE_LIMIT */ + uint32_t recv_size; + /*!< recovered tablespace size in pages; + 0 if no size change was read from the redo log, + or if the size change was implemented */ + uint32_t n_reserved_extents; + /*!< number of reserved free extents for + ongoing operations like B-tree page split */ +private: + /** the committed size of the tablespace in pages */ + Atomic_relaxed<uint32_t> committed_size; + /** Number of pending operations on the file. + The tablespace cannot be freed while (n_pending & PENDING) != 0. */ + std::atomic<uint32_t> n_pending; + /** Flag in n_pending that indicates that the tablespace is being + deleted, and no further operations should be performed */ + static constexpr uint32_t STOPPING= 1U << 31; + /** Flag in n_pending that indicates that the tablespace is a candidate + for being closed, and fil_node_t::is_open() can only be trusted after + acquiring fil_system.mutex and resetting the flag */ + static constexpr uint32_t CLOSING= 1U << 30; + /** Flag in n_pending that indicates that the tablespace needs fsync(). + This must be the least significant flag bit; @see release_flush() */ + static constexpr uint32_t NEEDS_FSYNC= 1U << 29; + /** The reference count */ + static constexpr uint32_t PENDING= ~(STOPPING | CLOSING | NEEDS_FSYNC); +public: + rw_lock_t latch; /*!< latch protecting the file space storage + allocation */ + UT_LIST_NODE_T(fil_space_t) named_spaces; + /*!< list of spaces for which FILE_MODIFY + records have been issued */ + UT_LIST_NODE_T(fil_space_t) space_list; + /*!< list of all spaces */ + + /** MariaDB encryption data */ + fil_space_crypt_t* crypt_data; + + /** Checks that this tablespace in a list of unflushed tablespaces. */ + bool is_in_unflushed_spaces; + + /** Checks that this tablespace needs key rotation. */ + bool is_in_default_encrypt; + + /** True if the device this filespace is on supports atomic writes */ + bool atomic_write_supported; + + /** True if file system storing this tablespace supports + punch hole */ + bool punch_hole; + + /** mutex to protect freed ranges */ + std::mutex freed_range_mutex; + + /** Variables to store freed ranges. This can be used to write + zeroes/punch the hole in files. Protected by freed_mutex */ + range_set freed_ranges; + + /** Stores last page freed lsn. Protected by freed_mutex */ + lsn_t last_freed_lsn; + + ulint magic_n;/*!< FIL_SPACE_MAGIC_N */ + + /** @return whether doublewrite buffering is needed */ + bool use_doublewrite() const + { + return !atomic_write_supported && srv_use_doublewrite_buf && + buf_dblwr.is_initialised(); + } + + /** Append a file to the chain of files of a space. + @param[in] name file name of a file that is not open + @param[in] handle file handle, or OS_FILE_CLOSED + @param[in] size file size in entire database pages + @param[in] is_raw whether this is a raw device + @param[in] atomic_write true if atomic write could be enabled + @param[in] max_pages maximum number of pages in file, + or UINT32_MAX for unlimited + @return file object */ + fil_node_t* add(const char* name, pfs_os_file_t handle, + uint32_t size, bool is_raw, bool atomic_write, + uint32_t max_pages = UINT32_MAX); +#ifdef UNIV_DEBUG + /** Assert that the mini-transaction is compatible with + updating an allocation bitmap page. + @param[in] mtr mini-transaction */ + void modify_check(const mtr_t& mtr) const; +#endif /* UNIV_DEBUG */ + + /** Try to reserve free extents. + @param[in] n_free_now current number of free extents + @param[in] n_to_reserve number of extents to reserve + @return whether the reservation succeeded */ + bool reserve_free_extents(uint32_t n_free_now, uint32_t n_to_reserve) + { + ut_ad(rw_lock_own(&latch, RW_LOCK_X)); + if (n_reserved_extents + n_to_reserve > n_free_now) { + return false; + } + + n_reserved_extents += n_to_reserve; + return true; + } + + /** Release the reserved free extents. + @param[in] n_reserved number of reserved extents */ + void release_free_extents(uint32_t n_reserved) + { + if (!n_reserved) return; + ut_ad(rw_lock_own(&latch, RW_LOCK_X)); + ut_a(n_reserved_extents >= n_reserved); + n_reserved_extents -= n_reserved; + } + + /** Rename a file. + @param[in] name table name after renaming + @param[in] path tablespace file name after renaming + @param[in] log whether to write redo log + @param[in] replace whether to ignore the existence of path + @return error code + @retval DB_SUCCESS on success */ + dberr_t rename(const char* name, const char* path, bool log, + bool replace = false); + + /** Note that the tablespace has been imported. + Initially, purpose=FIL_TYPE_IMPORT so that no redo log is + written while the space ID is being updated in each page. */ + inline void set_imported(); + + /** @return whether the storage device is rotational (HDD, not SSD) */ + inline bool is_rotational() const; + + /** Open each file. Never invoked on .ibd files. + @param create_new_db whether to skip the call to fil_node_t::read_page0() + @return whether all files were opened */ + bool open(bool create_new_db); + /** Close each file. Only invoked on fil_system.temp_space. */ + void close(); + + /** Note that operations on the tablespace must stop or can resume */ + inline void set_stopping(bool stopping); + +private: + MY_ATTRIBUTE((warn_unused_result)) + /** Try to acquire a tablespace reference. + @return the old reference count (if STOPPING is set, it was not acquired) */ + uint32_t acquire_low() + { + uint32_t n= 0; + while (!n_pending.compare_exchange_strong(n, n + 1, + std::memory_order_acquire, + std::memory_order_relaxed) && + !(n & STOPPING)); + return n; + } +public: + MY_ATTRIBUTE((warn_unused_result)) + /** Acquire a tablespace reference. + @return whether a tablespace reference was successfully acquired */ + inline bool acquire_if_not_stopped(); + + MY_ATTRIBUTE((warn_unused_result)) + /** Acquire a tablespace reference for I/O. + @return whether the file is usable */ + bool acquire() + { + uint32_t n= acquire_low(); + if (UNIV_LIKELY(!(n & (STOPPING | CLOSING)))) + return true; + return UNIV_LIKELY(!(n & STOPPING)) && prepare(); + } + + /** Acquire another tablespace reference for I/O. */ + inline void reacquire(); + + /** Release a tablespace reference. + @return whether this was the last reference */ + bool release() + { + uint32_t n= n_pending.fetch_sub(1, std::memory_order_release); + ut_ad(n & PENDING); + return (n & PENDING) == 1; + } + + /** Clear the NEEDS_FSYNC flag */ + void clear_flush() + { n_pending.fetch_and(~NEEDS_FSYNC, std::memory_order_release); } + +private: + /** @return pending operations (and flags) */ + uint32_t pending()const { return n_pending.load(std::memory_order_acquire); } +public: + /** @return whether close() of the file handle has been requested */ + bool is_closing() const { return pending() & CLOSING; } + /** @return whether the tablespace is going to be dropped */ + bool is_stopping() const { return pending() & STOPPING; } + /** @return number of pending operations */ + bool is_ready_to_close() const + { return (pending() & (PENDING | CLOSING)) == CLOSING; } + /** @return whether fsync() or similar is needed */ + bool needs_flush() const { return pending() & NEEDS_FSYNC; } + /** @return whether fsync() or similar is needed, and the tablespace is + not being dropped */ + bool needs_flush_not_stopping() const + { return (pending() & (NEEDS_FSYNC | STOPPING)) == NEEDS_FSYNC; } + + uint32_t referenced() const { return pending() & PENDING; } +private: + MY_ATTRIBUTE((warn_unused_result)) + /** Prepare to close the file handle. + @return number of pending operations, possibly with NEEDS_FSYNC flag */ + uint32_t set_closing() + { + return n_pending.fetch_or(CLOSING, std::memory_order_acquire) & + (PENDING | NEEDS_FSYNC); + } + +public: + /** Try to close a file to adhere to the innodb_open_files limit. + @param print_info whether to diagnose why a file cannot be closed + @return whether a file was closed */ + static bool try_to_close(bool print_info); + + /** Close all tablespace files at shutdown */ + static void close_all(); + + /** @return last_freed_lsn */ + lsn_t get_last_freed_lsn() { return last_freed_lsn; } + /** Update last_freed_lsn */ + void update_last_freed_lsn(lsn_t lsn) + { + std::lock_guard<std::mutex> freed_lock(freed_range_mutex); + last_freed_lsn= lsn; + } + + /** Note that the file will need fsync(). + @return whether this needs to be added to fil_system.unflushed_spaces */ + bool set_needs_flush() + { + uint32_t n= 1; + while (!n_pending.compare_exchange_strong(n, n | NEEDS_FSYNC, + std::memory_order_acquire, + std::memory_order_relaxed)) + { + ut_ad(n & PENDING); + if (n & (NEEDS_FSYNC | STOPPING)) + return false; + } + + return true; + } + + /** Clear all freed ranges for undo tablespace when InnoDB + encounters TRIM redo log record */ + void clear_freed_ranges() + { + std::lock_guard<std::mutex> freed_lock(freed_range_mutex); + freed_ranges.clear(); + } +#endif /* !UNIV_INNOCHECKSUM */ + /** FSP_SPACE_FLAGS and FSP_FLAGS_MEM_ flags; + check fsp0types.h to more info about flags. */ + ulint flags; + + /** Determine if full_crc32 is used for a data file + @param[in] flags tablespace flags (FSP_SPACE_FLAGS) + @return whether the full_crc32 algorithm is active */ + static bool full_crc32(ulint flags) { + return flags & FSP_FLAGS_FCRC32_MASK_MARKER; + } + /** @return whether innodb_checksum_algorithm=full_crc32 is active */ + bool full_crc32() const { return full_crc32(flags); } + /** Determine the logical page size. + @param flags tablespace flags (FSP_FLAGS) + @return the logical page size + @retval 0 if the flags are invalid */ + static unsigned logical_size(ulint flags) { + + ulint page_ssize = 0; + + if (full_crc32(flags)) { + page_ssize = FSP_FLAGS_FCRC32_GET_PAGE_SSIZE(flags); + } else { + page_ssize = FSP_FLAGS_GET_PAGE_SSIZE(flags); + } + + switch (page_ssize) { + case 3: return 4096; + case 4: return 8192; + case 5: + { ut_ad(full_crc32(flags)); return 16384; } + case 0: + { ut_ad(!full_crc32(flags)); return 16384; } + case 6: return 32768; + case 7: return 65536; + default: return 0; + } + } + /** Determine the ROW_FORMAT=COMPRESSED page size. + @param flags tablespace flags (FSP_FLAGS) + @return the ROW_FORMAT=COMPRESSED page size + @retval 0 if ROW_FORMAT=COMPRESSED is not used */ + static unsigned zip_size(ulint flags) { + + if (full_crc32(flags)) { + return 0; + } + + ulint zip_ssize = FSP_FLAGS_GET_ZIP_SSIZE(flags); + return zip_ssize + ? (UNIV_ZIP_SIZE_MIN >> 1) << zip_ssize : 0; + } + /** Determine the physical page size. + @param flags tablespace flags (FSP_FLAGS) + @return the physical page size */ + static unsigned physical_size(ulint flags) { + + if (full_crc32(flags)) { + return logical_size(flags); + } + + ulint zip_ssize = FSP_FLAGS_GET_ZIP_SSIZE(flags); + return zip_ssize + ? (UNIV_ZIP_SIZE_MIN >> 1) << zip_ssize + : unsigned(srv_page_size); + } + /** @return the ROW_FORMAT=COMPRESSED page size + @retval 0 if ROW_FORMAT=COMPRESSED is not used */ + unsigned zip_size() const { return zip_size(flags); } + /** @return the physical page size */ + unsigned physical_size() const { return physical_size(flags); } + /** Check whether the compression enabled in tablespace. + @param[in] flags tablespace flags */ + static bool is_compressed(ulint flags) { + + if (full_crc32(flags)) { + ulint algo = FSP_FLAGS_FCRC32_GET_COMPRESSED_ALGO( + flags); + DBUG_ASSERT(algo <= PAGE_ALGORITHM_LAST); + return algo > 0; + } + + return FSP_FLAGS_HAS_PAGE_COMPRESSION(flags); + } + /** @return whether the compression enabled for the tablespace. */ + bool is_compressed() const { return is_compressed(flags); } + + /** Get the compression algorithm for full crc32 format. + @param[in] flags tablespace flags + @return algorithm type of tablespace */ + static ulint get_compression_algo(ulint flags) + { + return full_crc32(flags) + ? FSP_FLAGS_FCRC32_GET_COMPRESSED_ALGO(flags) + : 0; + } + /** @return the page_compressed algorithm + @retval 0 if not page_compressed */ + ulint get_compression_algo() const { + return fil_space_t::get_compression_algo(flags); + } + /** Determine if the page_compressed page contains an extra byte + for exact compressed stream length + @param[in] flags tablespace flags + @return whether the extra byte is needed */ + static bool full_crc32_page_compressed_len(ulint flags) + { + DBUG_ASSERT(full_crc32(flags)); + switch (get_compression_algo(flags)) { + case PAGE_LZ4_ALGORITHM: + case PAGE_LZO_ALGORITHM: + case PAGE_SNAPPY_ALGORITHM: + return true; + } + return false; + } + + /** Whether the full checksum matches with non full checksum flags. + @param[in] flags flags present + @param[in] expected expected flags + @return true if it is equivalent */ + static bool is_flags_full_crc32_equal(ulint flags, ulint expected) + { + ut_ad(full_crc32(flags)); + ulint fcrc32_psize = FSP_FLAGS_FCRC32_GET_PAGE_SSIZE(flags); + + if (full_crc32(expected)) { + /* The data file may have been created with a + different innodb_compression_algorithm. But + we only support one innodb_page_size for all files. */ + return fcrc32_psize + == FSP_FLAGS_FCRC32_GET_PAGE_SSIZE(expected); + } + + ulint non_fcrc32_psize = FSP_FLAGS_GET_PAGE_SSIZE(expected); + + if (!non_fcrc32_psize) { + if (fcrc32_psize != 5) { + return false; + } + } else if (fcrc32_psize != non_fcrc32_psize) { + return false; + } + + return true; + } + /** Whether old tablespace flags match full_crc32 flags. + @param[in] flags flags present + @param[in] expected expected flags + @return true if it is equivalent */ + static bool is_flags_non_full_crc32_equal(ulint flags, ulint expected) + { + ut_ad(!full_crc32(flags)); + + if (!full_crc32(expected)) { + return false; + } + + ulint non_fcrc32_psize = FSP_FLAGS_GET_PAGE_SSIZE(flags); + ulint fcrc32_psize = FSP_FLAGS_FCRC32_GET_PAGE_SSIZE( + expected); + + if (!non_fcrc32_psize) { + if (fcrc32_psize != 5) { + return false; + } + } else if (fcrc32_psize != non_fcrc32_psize) { + return false; + } + + return true; + } + /** Whether both fsp flags are equivalent */ + static bool is_flags_equal(ulint flags, ulint expected) + { + if (!((flags ^ expected) & ~(1U << FSP_FLAGS_POS_RESERVED))) { + return true; + } + + return full_crc32(flags) + ? is_flags_full_crc32_equal(flags, expected) + : is_flags_non_full_crc32_equal(flags, expected); + } + /** Validate the tablespace flags for full crc32 format. + @param[in] flags the content of FSP_SPACE_FLAGS + @return whether the flags are correct in full crc32 format */ + static bool is_fcrc32_valid_flags(ulint flags) + { + ut_ad(flags & FSP_FLAGS_FCRC32_MASK_MARKER); + const ulint page_ssize = physical_size(flags); + if (page_ssize < 3 || page_ssize & 8) { + return false; + } + + flags >>= FSP_FLAGS_FCRC32_POS_COMPRESSED_ALGO; + + return flags <= PAGE_ALGORITHM_LAST; + } + /** Validate the tablespace flags. + @param[in] flags content of FSP_SPACE_FLAGS + @param[in] is_ibd whether this is an .ibd file + (not system tablespace) + @return whether the flags are correct. */ + static bool is_valid_flags(ulint flags, bool is_ibd) + { + DBUG_EXECUTE_IF("fsp_flags_is_valid_failure", + return false;); + + if (full_crc32(flags)) { + return is_fcrc32_valid_flags(flags); + } + + if (flags == 0) { + return true; + } + + if (flags & ~FSP_FLAGS_MASK) { + return false; + } + + if ((flags & (FSP_FLAGS_MASK_POST_ANTELOPE + | FSP_FLAGS_MASK_ATOMIC_BLOBS)) + == FSP_FLAGS_MASK_ATOMIC_BLOBS) { + /* If the "atomic blobs" flag (indicating + ROW_FORMAT=DYNAMIC or ROW_FORMAT=COMPRESSED) flag + is set, then the "post Antelope" + (ROW_FORMAT!=REDUNDANT) flag must also be set. */ + return false; + } + + /* Bits 10..14 should be 0b0000d where d is the DATA_DIR flag + of MySQL 5.6 and MariaDB 10.0, which we ignore. + In the buggy FSP_SPACE_FLAGS written by MariaDB 10.1.0 to 10.1.20, + bits 10..14 would be nonzero 0bsssaa where sss is + nonzero PAGE_SSIZE (3, 4, 6, or 7) + and aa is ATOMIC_WRITES (not 0b11). */ + if (FSP_FLAGS_GET_RESERVED(flags) & ~1U) { + return false; + } + + const ulint ssize = FSP_FLAGS_GET_PAGE_SSIZE(flags); + if (ssize == 1 || ssize == 2 || ssize == 5 || ssize & 8) { + /* the page_size is not between 4k and 64k; + 16k should be encoded as 0, not 5 */ + return false; + } + + const ulint zssize = FSP_FLAGS_GET_ZIP_SSIZE(flags); + if (zssize == 0) { + /* not ROW_FORMAT=COMPRESSED */ + } else if (zssize > (ssize ? ssize : 5)) { + /* Invalid KEY_BLOCK_SIZE */ + return false; + } else if (~flags & (FSP_FLAGS_MASK_POST_ANTELOPE + | FSP_FLAGS_MASK_ATOMIC_BLOBS)) { + /* both these flags should be set for + ROW_FORMAT=COMPRESSED */ + return false; + } + + /* The flags do look valid. But, avoid misinterpreting + buggy MariaDB 10.1 format flags for + PAGE_COMPRESSED=1 PAGE_COMPRESSION_LEVEL={0,2,3} + as valid-looking PAGE_SSIZE if this is known to be + an .ibd file and we are using the default innodb_page_size=16k. */ + return(ssize == 0 || !is_ibd + || srv_page_size != UNIV_PAGE_SIZE_ORIG); + } + +#ifndef UNIV_INNOCHECKSUM + MY_ATTRIBUTE((warn_unused_result)) + /** Create a tablespace in fil_system. + @param name tablespace name + @param id tablespace identifier + @param flags tablespace flags + @param purpose tablespace purpose + @param crypt_data encryption information + @param mode encryption mode + @return pointer to created tablespace, to be filled in with add() + @retval nullptr on failure (such as when the same tablespace exists) */ + static fil_space_t *create(const char *name, ulint id, ulint flags, + fil_type_t purpose, fil_space_crypt_t *crypt_data, + fil_encryption_t mode= FIL_ENCRYPTION_DEFAULT); + + MY_ATTRIBUTE((warn_unused_result)) + /** Acquire a tablespace reference. + @param id tablespace identifier + @return tablespace + @retval nullptr if the tablespace is missing or inaccessible */ + static fil_space_t *get(ulint id); + + /** Add/remove the free page in the freed ranges list. + @param[in] offset page number to be added + @param[in] free true if page to be freed */ + void free_page(uint32_t offset, bool add=true) + { + std::lock_guard<std::mutex> freed_lock(freed_range_mutex); + if (add) + return freed_ranges.add_value(offset); + + if (freed_ranges.empty()) + return; + + return freed_ranges.remove_value(offset); + } + + /** Add the range of freed pages */ + void add_free_ranges(range_set ranges) + { + std::lock_guard<std::mutex> freed_lock(freed_range_mutex); + freed_ranges= std::move(ranges); + } + + /** Add the set of freed page ranges */ + void add_free_range(const range_t range) + { + std::lock_guard<std::mutex> freed_lock(freed_range_mutex); + freed_ranges.add_range(range); + } + + /** Set the tablespace size in pages */ + void set_sizes(uint32_t s) + { + ut_ad(id ? !size : (size >= s)); + size= s; committed_size= s; + } + + /** Update committed_size in mtr_t::commit() */ + void set_committed_size() + { + ut_ad(rw_lock_own(&latch, RW_LOCK_X)); + committed_size= size; + } + + /** @return the last persisted page number */ + uint32_t last_page_number() const { return committed_size - 1; } + + /** @return the size in pages (0 if unreadable) */ + inline uint32_t get_size(); + + /** Read or write data. + @param type I/O context + @param offset offset in bytes + @param len number of bytes + @param buf the data to be read or written + @param bpage buffer block (for type.is_async() completion callback) + @return status and file descriptor */ + fil_io_t io(const IORequest &type, os_offset_t offset, size_t len, + void *buf, buf_page_t *bpage= nullptr); + /** Flush pending writes from the file system cache to the file. */ + template<bool have_reference> inline void flush(); + /** Flush pending writes from the file system cache to the file. */ + void flush_low(); + + /** Read the first page of a data file. + @return whether the page was found valid */ + bool read_page0(); + + /** Determine the next tablespace for encryption key rotation. + @param space current tablespace (nullptr to start from the beginning) + @param recheck whether the removal condition needs to be rechecked after + encryption parameters were changed + @param encrypt expected state of innodb_encrypt_tables + @return the next tablespace + @retval nullptr upon reaching the end of the iteration */ + static inline fil_space_t *next(fil_space_t *space, bool recheck, + bool encrypt); + +private: + /** @return whether the file is usable for io() */ + ATTRIBUTE_COLD bool prepare(bool have_mutex= false); +#endif /*!UNIV_INNOCHECKSUM */ +}; + +#ifndef UNIV_INNOCHECKSUM +/** Value of fil_space_t::magic_n */ +#define FIL_SPACE_MAGIC_N 89472 + +/** File node of a tablespace or the log data space */ +struct fil_node_t final +{ + /** tablespace containing this file */ + fil_space_t* space; + /** file name; protected by fil_system.mutex and log_sys.mutex. */ + char* name; + /** file handle (valid if is_open) */ + pfs_os_file_t handle; + /** whether the file actually is a raw device or disk partition */ + bool is_raw_disk; + /** whether the file is on non-rotational media (SSD) */ + bool on_ssd; + /** size of the file in database pages (0 if not known yet); + the possible last incomplete megabyte may be ignored + if space->id == 0 */ + uint32_t size; + /** initial size of the file in database pages; + FIL_IBD_FILE_INITIAL_SIZE by default */ + uint32_t init_size; + /** maximum size of the file in database pages (0 if unlimited) */ + uint32_t max_size; + /** whether the file is currently being extended */ + Atomic_relaxed<bool> being_extended; + /** link to other files in this tablespace */ + UT_LIST_NODE_T(fil_node_t) chain; + + /** whether this file could use atomic write (data file) */ + bool atomic_write; + + /** Filesystem block size */ + ulint block_size; + + /** FIL_NODE_MAGIC_N */ + ulint magic_n; + + /** @return whether this file is open */ + bool is_open() const + { + return(handle != OS_FILE_CLOSED); + } + + /** Read the first page of a data file. + @return whether the page was found valid */ + bool read_page0(); + + /** Determine some file metadata when creating or reading the file. + @param file the file that is being created, or OS_FILE_CLOSED */ + void find_metadata(os_file_t file = OS_FILE_CLOSED +#ifndef _WIN32 + , struct stat* statbuf = NULL +#endif + ); + + /** Close the file handle. */ + void close(); + /** Same as close() but returns file handle instead of closing it. */ + pfs_os_file_t detach() MY_ATTRIBUTE((warn_unused_result)); + /** Prepare to free a file from fil_system. + @param detach_handle whether to detach instead of closing a handle + @return detached handle or OS_FILE_CLOSED */ + inline pfs_os_file_t close_to_free(bool detach_handle= false); + + /** Update the data structures on write completion */ + inline void complete_write(); + +private: + /** Does stuff common for close() and detach() */ + void prepare_to_close_or_detach(); +}; + +/** Value of fil_node_t::magic_n */ +#define FIL_NODE_MAGIC_N 89389 + +inline void fil_space_t::set_imported() +{ + ut_ad(purpose == FIL_TYPE_IMPORT); + purpose= FIL_TYPE_TABLESPACE; + UT_LIST_GET_FIRST(chain)->find_metadata(); +} + +inline bool fil_space_t::is_rotational() const +{ + for (const fil_node_t *node= UT_LIST_GET_FIRST(chain); node; + node= UT_LIST_GET_NEXT(chain, node)) + if (!node->on_ssd) + return true; + return false; +} + +/** Common InnoDB file extensions */ +enum ib_extention { + NO_EXT = 0, + IBD = 1, + ISL = 2, + CFG = 3 +}; +extern const char* dot_ext[]; +#define DOT_IBD dot_ext[IBD] +#define DOT_ISL dot_ext[ISL] +#define DOT_CFG dot_ext[CFG] + +/** When mysqld is run, the default directory "." is the mysqld datadir, +but in the MySQL Embedded Server Library and mysqlbackup it is not the default +directory, and we must set the base file path explicitly */ +extern const char* fil_path_to_mysql_datadir; +#else +# include "univ.i" +#endif /* !UNIV_INNOCHECKSUM */ + +/** Initial size of a single-table tablespace in pages */ +#define FIL_IBD_FILE_INITIAL_SIZE 4U + +/** 'null' (undefined) page offset in the context of file spaces */ +#define FIL_NULL ULINT32_UNDEFINED + + +#define FIL_ADDR_PAGE 0U /* first in address is the page offset */ +#define FIL_ADDR_BYTE 4U /* then comes 2-byte byte offset within page*/ +#define FIL_ADDR_SIZE 6U /* address size is 6 bytes */ + +/** File space address */ +struct fil_addr_t { + /** page number within a tablespace */ + uint32_t page; + /** byte offset within the page */ + uint16_t boffset; +}; + +/** The byte offsets on a file page for various variables @{ */ +#define FIL_PAGE_SPACE_OR_CHKSUM 0 /*!< in < MySQL-4.0.14 space id the + page belongs to (== 0) but in later + versions the 'new' checksum of the + page */ +#define FIL_PAGE_OFFSET 4U /*!< page offset inside space */ +#define FIL_PAGE_PREV 8U /*!< if there is a 'natural' + predecessor of the page, its + offset. Otherwise FIL_NULL. + This field is not set on BLOB + pages, which are stored as a + singly-linked list. See also + FIL_PAGE_NEXT. */ +#define FIL_PAGE_NEXT 12U /*!< if there is a 'natural' successor + of the page, its offset. + Otherwise FIL_NULL. + B-tree index pages + (FIL_PAGE_TYPE contains FIL_PAGE_INDEX) + on the same PAGE_LEVEL are maintained + as a doubly linked list via + FIL_PAGE_PREV and FIL_PAGE_NEXT + in the collation order of the + smallest user record on each page. */ +#define FIL_PAGE_LSN 16U /*!< lsn of the end of the newest + modification log record to the page */ +#define FIL_PAGE_TYPE 24U /*!< file page type: FIL_PAGE_INDEX,..., + 2 bytes. + + The contents of this field can only + be trusted in the following case: + if the page is an uncompressed + B-tree index page, then it is + guaranteed that the value is + FIL_PAGE_INDEX. + The opposite does not hold. + + In tablespaces created by + MySQL/InnoDB 5.1.7 or later, the + contents of this field is valid + for all uncompressed pages. */ + +/** For the first page in a system tablespace data file(ibdata*, not *.ibd): +the file has been flushed to disk at least up to this lsn +For other pages: 32-bit key version used to encrypt the page + 32-bit checksum +or 64 bites of zero if no encryption */ +#define FIL_PAGE_FILE_FLUSH_LSN_OR_KEY_VERSION 26U + +/** This overloads FIL_PAGE_FILE_FLUSH_LSN for RTREE Split Sequence Number */ +#define FIL_RTREE_SPLIT_SEQ_NUM FIL_PAGE_FILE_FLUSH_LSN_OR_KEY_VERSION + +/** Start of the page_compressed content */ +#define FIL_PAGE_COMP_ALGO FIL_PAGE_FILE_FLUSH_LSN_OR_KEY_VERSION + +/** starting from 4.1.x this contains the space id of the page */ +#define FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID 34U + +#define FIL_PAGE_SPACE_ID FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID + +#define FIL_PAGE_DATA 38U /*!< start of the data on the page */ + +/** 32-bit key version used to encrypt the page in full_crc32 format. +For non-encrypted page, it contains 0. */ +#define FIL_PAGE_FCRC32_KEY_VERSION 0 + +/** page_compressed without innodb_checksum_algorithm=full_crc32 @{ */ +/** Number of bytes used to store actual payload data size on +page_compressed pages when not using full_crc32. */ +#define FIL_PAGE_COMP_SIZE 0 + +/** Number of bytes for FIL_PAGE_COMP_SIZE */ +#define FIL_PAGE_COMP_METADATA_LEN 2 + +/** Number of bytes used to store actual compression method +for encrypted tables when not using full_crc32. */ +#define FIL_PAGE_ENCRYPT_COMP_ALGO 2 + +/** Extra header size for encrypted page_compressed pages when +not using full_crc32 */ +#define FIL_PAGE_ENCRYPT_COMP_METADATA_LEN 4 +/* @} */ + +/** File page trailer @{ */ +#define FIL_PAGE_END_LSN_OLD_CHKSUM 8 /*!< the low 4 bytes of this are used + to store the page checksum, the + last 4 bytes should be identical + to the last 4 bytes of FIL_PAGE_LSN */ +#define FIL_PAGE_DATA_END 8 /*!< size of the page trailer */ + +/** Store the last 4 bytes of FIL_PAGE_LSN */ +#define FIL_PAGE_FCRC32_END_LSN 8 + +/** Store crc32 checksum at the end of the page */ +#define FIL_PAGE_FCRC32_CHECKSUM 4 +/* @} */ + +/** File page types (values of FIL_PAGE_TYPE) @{ */ +/** page_compressed, encrypted=YES (not used for full_crc32) */ +constexpr uint16_t FIL_PAGE_PAGE_COMPRESSED_ENCRYPTED= 37401; +/** page_compressed (not used for full_crc32) */ +constexpr uint16_t FIL_PAGE_PAGE_COMPRESSED= 34354; +/** B-tree index page */ +constexpr uint16_t FIL_PAGE_INDEX= 17855; +/** R-tree index page (SPATIAL INDEX) */ +constexpr uint16_t FIL_PAGE_RTREE= 17854; +/** Undo log page */ +constexpr uint16_t FIL_PAGE_UNDO_LOG= 2; +/** Index node (of file-in-file metadata) */ +constexpr uint16_t FIL_PAGE_INODE= 3; +/** Insert buffer free list */ +constexpr uint16_t FIL_PAGE_IBUF_FREE_LIST= 4; +/** Freshly allocated page */ +constexpr uint16_t FIL_PAGE_TYPE_ALLOCATED= 0; +/** Change buffer bitmap (pages n*innodb_page_size+1) */ +constexpr uint16_t FIL_PAGE_IBUF_BITMAP= 5; +/** System page */ +constexpr uint16_t FIL_PAGE_TYPE_SYS= 6; +/** Transaction system data */ +constexpr uint16_t FIL_PAGE_TYPE_TRX_SYS= 7; +/** Tablespace header (page 0) */ +constexpr uint16_t FIL_PAGE_TYPE_FSP_HDR= 8; +/** Extent descriptor page (pages n*innodb_page_size, except 0) */ +constexpr uint16_t FIL_PAGE_TYPE_XDES= 9; +/** Uncompressed BLOB page */ +constexpr uint16_t FIL_PAGE_TYPE_BLOB= 10; +/** First ROW_FORMAT=COMPRESSED BLOB page */ +constexpr uint16_t FIL_PAGE_TYPE_ZBLOB= 11; +/** Subsequent ROW_FORMAT=COMPRESSED BLOB page */ +constexpr uint16_t FIL_PAGE_TYPE_ZBLOB2= 12; +/** In old tablespaces, garbage in FIL_PAGE_TYPE is replaced with this +value when flushing pages. */ +constexpr uint16_t FIL_PAGE_TYPE_UNKNOWN= 13; + +/* File page types introduced in MySQL 5.7, not supported in MariaDB */ +//constexpr uint16_t FIL_PAGE_COMPRESSED = 14; +//constexpr uint16_t FIL_PAGE_ENCRYPTED = 15; +//constexpr uint16_t FIL_PAGE_COMPRESSED_AND_ENCRYPTED = 16; +//constexpr FIL_PAGE_ENCRYPTED_RTREE = 17; +/** Clustered index root page after instant ADD COLUMN */ +constexpr uint16_t FIL_PAGE_TYPE_INSTANT= 18; + +/** Used by i_s.cc to index into the text description. +Note: FIL_PAGE_TYPE_INSTANT maps to the same as FIL_PAGE_INDEX. */ +constexpr uint16_t FIL_PAGE_TYPE_LAST= FIL_PAGE_TYPE_UNKNOWN; + +/** Set in FIL_PAGE_TYPE for full_crc32 pages in page_compressed format. +If the flag is set, then the following holds for the remaining bits +of FIL_PAGE_TYPE: +Bits 0..7 will contain the compressed page size in bytes. +Bits 8..14 are reserved and must be 0. */ +constexpr uint16_t FIL_PAGE_COMPRESS_FCRC32_MARKER= 15; +/* @} */ + +/** @return whether the page type is B-tree or R-tree index */ +inline bool fil_page_type_is_index(uint16_t page_type) +{ + switch (page_type) { + case FIL_PAGE_TYPE_INSTANT: + case FIL_PAGE_INDEX: + case FIL_PAGE_RTREE: + return(true); + } + return(false); +} + +/** Check whether the page is index page (either regular Btree index or Rtree +index */ +#define fil_page_index_page_check(page) \ + fil_page_type_is_index(fil_page_get_type(page)) + +/** Get the file page type. +@param[in] page file page +@return page type */ +inline uint16_t fil_page_get_type(const byte *page) +{ + return mach_read_from_2(my_assume_aligned<2>(page + FIL_PAGE_TYPE)); +} + +#ifndef UNIV_INNOCHECKSUM + +/** Number of pending tablespace flushes */ +extern Atomic_counter<ulint> fil_n_pending_tablespace_flushes; + +/** Look up a tablespace. +The caller should hold an InnoDB table lock or a MDL that prevents +the tablespace from being dropped during the operation, +or the caller should be in single-threaded crash recovery mode +(no user connections that could drop tablespaces). +Normally, fil_space_t::get() should be used instead. +@param[in] id tablespace ID +@return tablespace, or NULL if not found */ +fil_space_t* +fil_space_get( + ulint id) + MY_ATTRIBUTE((warn_unused_result)); + +/** The tablespace memory cache; also the totality of logs (the log +data space) is stored here; below we talk about tablespaces */ +struct fil_system_t { + /** + Constructor. + + Some members may require late initialisation, thus we just mark object as + uninitialised. Real initialisation happens in create(). + */ + fil_system_t(): m_initialised(false) + { + UT_LIST_INIT(space_list, &fil_space_t::space_list); + UT_LIST_INIT(named_spaces, &fil_space_t::named_spaces); + } + + bool is_initialised() const { return m_initialised; } + + /** + Create the file system interface at database start. + + @param[in] hash_size hash table size + */ + void create(ulint hash_size); + + /** Close the file system interface at shutdown */ + void close(); + +private: + bool m_initialised; +#ifdef UNIV_LINUX + /** available block devices that reside on non-rotational storage */ + std::vector<dev_t> ssd; +public: + /** @return whether a file system device is on non-rotational storage */ + bool is_ssd(dev_t dev) const + { + /* Linux seems to allow up to 15 partitions per block device. + If the detected ssd carries "partition number 0" (it is the whole device), + compare the candidate file system number without the partition number. */ + for (const auto s : ssd) + if (dev == s || (dev & ~15U) == s) + return true; + return false; + } +#endif +public: + /** Detach a tablespace from the cache and close the files. + @param space tablespace + @param detach_handle whether to detach or close handles + @return detached handles or empty vector */ + std::vector<pfs_os_file_t> detach(fil_space_t *space, + bool detach_handle= false); + + ib_mutex_t mutex; /*!< The mutex protecting the cache */ + fil_space_t* sys_space; /*!< The innodb_system tablespace */ + fil_space_t* temp_space; /*!< The innodb_temporary tablespace */ + /** Map of fil_space_t::id to fil_space_t* */ + hash_table_t spaces; + /** tablespaces for which fil_space_t::needs_flush() holds */ + sized_ilist<fil_space_t, unflushed_spaces_tag_t> unflushed_spaces; + /** number of currently open files; protected by mutex */ + ulint n_open; + ulint max_assigned_id;/*!< maximum space id in the existing + tables, or assigned during the time + mysqld has been up; at an InnoDB + startup we scan the data dictionary + and set here the maximum of the + space id's of the tables there */ + /** nonzero if fil_node_open_file_low() should avoid moving the tablespace + to the end of space_list, for FIFO policy of try_to_close() */ + ulint freeze_space_list; + UT_LIST_BASE_NODE_T(fil_space_t) space_list; + /*!< list of all file spaces */ + UT_LIST_BASE_NODE_T(fil_space_t) named_spaces; + /*!< list of all file spaces + for which a FILE_MODIFY + record has been written since + the latest redo log checkpoint. + Protected only by log_sys.mutex. */ + + /** List of all file spaces need key rotation */ + ilist<fil_space_t, rotation_list_tag_t> default_encrypt_tables; + + bool space_id_reuse_warned; + /*!< whether fil_space_t::create() + has issued a warning about + potential space_id reuse */ + + /** Return the next tablespace from default_encrypt_tables list. + @param space previous tablespace (nullptr to start from the start) + @param recheck whether the removal condition needs to be rechecked after + the encryption parameters were changed + @param encrypt expected state of innodb_encrypt_tables + @return the next tablespace to process (n_pending_ops incremented) + @retval fil_system.temp_space if there is no work to do + @retval nullptr upon reaching the end of the iteration */ + inline fil_space_t* default_encrypt_next(fil_space_t *space, bool recheck, + bool encrypt); + + /** Extend all open data files to the recovered size */ + ATTRIBUTE_COLD void extend_to_recv_size(); +}; + +/** The tablespace memory cache. */ +extern fil_system_t fil_system; + +inline void fil_space_t::reacquire() +{ + ut_d(uint32_t n=) n_pending.fetch_add(1, std::memory_order_relaxed); + ut_d(if (mutex_own(&fil_system.mutex)) return); + ut_ad(n & PENDING); + ut_ad(UT_LIST_GET_FIRST(chain)->is_open()); +} + +/** Note that operations on the tablespace must stop or can resume */ +inline void fil_space_t::set_stopping(bool stopping) +{ + ut_ad(mutex_own(&fil_system.mutex)); + ut_d(auto n=) n_pending.fetch_xor(STOPPING, std::memory_order_relaxed); + ut_ad(!(n & STOPPING) == stopping); +} + +/** Flush pending writes from the file system cache to the file. */ +template<bool have_reference> inline void fil_space_t::flush() +{ + ut_ad(!mutex_own(&fil_system.mutex)); + ut_ad(!have_reference || (pending() & PENDING)); + ut_ad(purpose == FIL_TYPE_TABLESPACE || purpose == FIL_TYPE_IMPORT); + if (srv_file_flush_method == SRV_O_DIRECT_NO_FSYNC) + { + ut_ad(!is_in_unflushed_spaces); + ut_ad(!needs_flush()); + } + else if (have_reference) + flush_low(); + else if (!(acquire_low() & STOPPING)) + { + flush_low(); + release(); + } +} + +/** @return the size in pages (0 if unreadable) */ +inline uint32_t fil_space_t::get_size() +{ + if (!size) + { + mutex_enter(&fil_system.mutex); + read_page0(); + mutex_exit(&fil_system.mutex); + } + return size; +} + +#include "fil0crypt.h" + +/*******************************************************************//** +Assigns a new space id for a new single-table tablespace. This works simply by +incrementing the global counter. If 4 billion id's is not enough, we may need +to recycle id's. +@return true if assigned, false if not */ +bool +fil_assign_new_space_id( +/*====================*/ + ulint* space_id); /*!< in/out: space id */ + +/** Frees a space object from the tablespace memory cache. +Closes the files in the chain but does not delete them. +There must not be any pending i/o's or flushes on the files. +@param[in] id tablespace identifier +@param[in] x_latched whether the caller holds X-mode space->latch +@return true if success */ +bool +fil_space_free( + ulint id, + bool x_latched); + +/** Set the recovered size of a tablespace in pages. +@param id tablespace ID +@param size recovered size in pages +@param flags tablespace flags */ +void fil_space_set_recv_size_and_flags(ulint id, uint32_t size, + uint32_t flags); + +/*******************************************************************//** +Sets the max tablespace id counter if the given number is bigger than the +previous value. */ +void +fil_set_max_space_id_if_bigger( +/*===========================*/ + ulint max_id);/*!< in: maximum known id */ + +/** Write the flushed LSN to the page header of the first page in the +system tablespace. +@param[in] lsn flushed LSN +@return DB_SUCCESS or error number */ +dberr_t +fil_write_flushed_lsn( + lsn_t lsn) +MY_ATTRIBUTE((warn_unused_result)); + +/** Delete a tablespace and associated .ibd file. +@param[in] id tablespace identifier +@param[in] if_exists whether to ignore missing tablespace +@param[out] leaked_handles return detached handles here +@return DB_SUCCESS or error */ +dberr_t +fil_delete_tablespace(ulint id, bool if_exists= false, + std::vector<pfs_os_file_t> *detached_handles= nullptr); + +/** Prepare to truncate an undo tablespace. +@param[in] space_id undo tablespace id +@return the tablespace +@retval NULL if the tablespace does not exist */ +fil_space_t* fil_truncate_prepare(ulint space_id); + +/** Close a single-table tablespace on failed IMPORT TABLESPACE. +The tablespace must be cached in the memory cache. +Free all pages used by the tablespace. */ +void fil_close_tablespace(ulint id); + +/*******************************************************************//** +Allocates and builds a file name from a path, a table or tablespace name +and a suffix. The string must be freed by caller with ut_free(). +@param[in] path NULL or the directory path or the full path and filename. +@param[in] name NULL if path is full, or Table/Tablespace name +@param[in] suffix NULL or the file extention to use. +@return own: file name */ +char* +fil_make_filepath( + const char* path, + const char* name, + ib_extention suffix, + bool strip_name); + +/** Create a tablespace file. +@param[in] space_id Tablespace ID +@param[in] name Tablespace name in dbname/tablename format. +@param[in] path Path and filename of the datafile to create. +@param[in] flags Tablespace flags +@param[in] size Initial size of the tablespace file in pages, +must be >= FIL_IBD_FILE_INITIAL_SIZE +@param[in] mode MariaDB encryption mode +@param[in] key_id MariaDB encryption key_id +@param[out] err DB_SUCCESS or error code +@return the created tablespace +@retval NULL on error */ +fil_space_t* +fil_ibd_create( + ulint space_id, + const char* name, + const char* path, + ulint flags, + uint32_t size, + fil_encryption_t mode, + uint32_t key_id, + dberr_t* err) + MY_ATTRIBUTE((nonnull(2,8), warn_unused_result)); + +/** Try to adjust FSP_SPACE_FLAGS if they differ from the expectations. +(Typically when upgrading from MariaDB 10.1.0..10.1.20.) +@param[in,out] space tablespace +@param[in] flags desired tablespace flags */ +void fsp_flags_try_adjust(fil_space_t* space, ulint flags); + +/********************************************************************//** +Tries to open a single-table tablespace and optionally checks the space id is +right in it. If does not succeed, prints an error message to the .err log. This +function is used to open a tablespace when we start up mysqld, and also in +IMPORT TABLESPACE. +NOTE that we assume this operation is used either at the database startup +or under the protection of the dictionary mutex, so that two users cannot +race here. This operation does not leave the file associated with the +tablespace open, but closes it after we have looked at the space id in it. + +If the validate boolean is set, we read the first page of the file and +check that the space id in the file is what we expect. We assume that +this function runs much faster if no check is made, since accessing the +file inode probably is much faster (the OS caches them) than accessing +the first page of the file. This boolean may be initially false, but if +a remote tablespace is found it will be changed to true. + +If the fix_dict boolean is set, then it is safe to use an internal SQL +statement to update the dictionary tables if they are incorrect. + +@param[in] validate true if we should validate the tablespace +@param[in] fix_dict true if the dictionary is available to be fixed +@param[in] purpose FIL_TYPE_TABLESPACE or FIL_TYPE_TEMPORARY +@param[in] id tablespace ID +@param[in] flags expected FSP_SPACE_FLAGS +@param[in] tablename table name +If file-per-table, it is the table name in the databasename/tablename format +@param[in] path_in expected filepath, usually read from dictionary +@param[out] err DB_SUCCESS or error code +@return tablespace +@retval NULL if the tablespace could not be opened */ +fil_space_t* +fil_ibd_open( + bool validate, + bool fix_dict, + fil_type_t purpose, + ulint id, + ulint flags, + const table_name_t& tablename, + const char* path_in, + dberr_t* err = NULL) + MY_ATTRIBUTE((warn_unused_result)); + +enum fil_load_status { + /** The tablespace file(s) were found and valid. */ + FIL_LOAD_OK, + /** The name no longer matches space_id */ + FIL_LOAD_ID_CHANGED, + /** The file(s) were not found */ + FIL_LOAD_NOT_FOUND, + /** The file(s) were not valid */ + FIL_LOAD_INVALID +}; + +/** Open a single-file tablespace and add it to the InnoDB data structures. +@param[in] space_id tablespace ID +@param[in] filename path/to/databasename/tablename.ibd +@param[out] space the tablespace, or NULL on error +@return status of the operation */ +enum fil_load_status +fil_ibd_load( + ulint space_id, + const char* filename, + fil_space_t*& space) + MY_ATTRIBUTE((warn_unused_result)); + + +/** Determine if a matching tablespace exists in the InnoDB tablespace +memory cache. Note that if we have not done a crash recovery at the database +startup, there may be many tablespaces which are not yet in the memory cache. +@param[in] id Tablespace ID +@param[in] name Tablespace name used in fil_space_t::create(). +@param[in] table_flags table flags +@return the tablespace +@retval NULL if no matching tablespace exists in the memory cache */ +fil_space_t* +fil_space_for_table_exists_in_mem( + ulint id, + const char* name, + ulint table_flags); + +/** Try to extend a tablespace if it is smaller than the specified size. +@param[in,out] space tablespace +@param[in] size desired size in pages +@return whether the tablespace is at least as big as requested */ +bool fil_space_extend(fil_space_t *space, uint32_t size); + +/** Flush to disk the writes in file spaces of the given type +possibly cached by the OS. */ +void fil_flush_file_spaces(); +/******************************************************************//** +Checks the consistency of the tablespace cache. +@return true if ok */ +bool fil_validate(); +/*********************************************************************//** +Sets the file page type. */ +void +fil_page_set_type( +/*==============*/ + byte* page, /*!< in/out: file page */ + ulint type); /*!< in: type */ + +/********************************************************************//** +Delete the tablespace file and any related files like .cfg. +This should not be called for temporary tables. */ +void +fil_delete_file( +/*============*/ + const char* path); /*!< in: filepath of the ibd tablespace */ + +/********************************************************************//** +Looks for a pre-existing fil_space_t with the given tablespace ID +and, if found, returns the name and filepath in newly allocated buffers that the caller must free. +@param[in] space_id The tablespace ID to search for. +@param[out] name Name of the tablespace found. +@param[out] fileapth The filepath of the first datafile for thtablespace found. +@return true if tablespace is found, false if not. */ +bool +fil_space_read_name_and_filepath( + ulint space_id, + char** name, + char** filepath); + +/** Convert a file name to a tablespace name. +@param[in] filename directory/databasename/tablename.ibd +@return database/tablename string, to be freed with ut_free() */ +char* +fil_path_to_space_name( + const char* filename); + +/** Acquire the fil_system mutex. */ +#define fil_system_enter() mutex_enter(&fil_system.mutex) +/** Release the fil_system mutex. */ +#define fil_system_exit() mutex_exit(&fil_system.mutex) + +/*******************************************************************//** +Returns the table space by a given id, NULL if not found. */ +fil_space_t* +fil_space_get_by_id( +/*================*/ + ulint id); /*!< in: space id */ + +/** Note that a non-predefined persistent tablespace has been modified +by redo log. +@param[in,out] space tablespace */ +void +fil_names_dirty( + fil_space_t* space); + +/** Write FILE_MODIFY records when a non-predefined persistent +tablespace was modified for the first time since the latest +fil_names_clear(). +@param[in,out] space tablespace */ +void fil_names_dirty_and_write(fil_space_t* space); + +/** Write FILE_MODIFY records if a persistent tablespace was modified +for the first time since the latest fil_names_clear(). +@param[in,out] space tablespace +@param[in,out] mtr mini-transaction +@return whether any FILE_MODIFY record was written */ +inline bool fil_names_write_if_was_clean(fil_space_t* space) +{ + mysql_mutex_assert_owner(&log_sys.mutex); + + if (space == NULL) { + return(false); + } + + const bool was_clean = space->max_lsn == 0; + ut_ad(space->max_lsn <= log_sys.get_lsn()); + space->max_lsn = log_sys.get_lsn(); + + if (was_clean) { + fil_names_dirty_and_write(space); + } + + return(was_clean); +} + +/** On a log checkpoint, reset fil_names_dirty_and_write() flags +and write out FILE_MODIFY and FILE_CHECKPOINT if needed. +@param[in] lsn checkpoint LSN +@param[in] do_write whether to always write FILE_CHECKPOINT +@return whether anything was written to the redo log +@retval false if no flags were set and nothing written +@retval true if anything was written to the redo log */ +bool +fil_names_clear( + lsn_t lsn, + bool do_write); + +#ifdef UNIV_ENABLE_UNIT_TEST_MAKE_FILEPATH +void test_make_filepath(); +#endif /* UNIV_ENABLE_UNIT_TEST_MAKE_FILEPATH */ + +/** Determine the block size of the data file. +@param[in] space tablespace +@param[in] offset page number +@return block size */ +UNIV_INTERN +ulint +fil_space_get_block_size(const fil_space_t* space, unsigned offset); + +#include "fil0fil.ic" +#endif /* UNIV_INNOCHECKSUM */ + +#endif /* fil0fil_h */ |