diff options
Diffstat (limited to 'storage/innobase/include/fil0pagecompress.h')
| -rw-r--r-- | storage/innobase/include/fil0pagecompress.h | 58 |
1 files changed, 42 insertions, 16 deletions
diff --git a/storage/innobase/include/fil0pagecompress.h b/storage/innobase/include/fil0pagecompress.h index 03e16699ce3..bd1395b4835 100644 --- a/storage/innobase/include/fil0pagecompress.h +++ b/storage/innobase/include/fil0pagecompress.h @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (C) 2013, 2017 MariaDB Corporation. All Rights Reserved. +Copyright (C) 2013, 2018 MariaDB Corporation. All Rights Reserved. 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 @@ -19,6 +19,8 @@ this program; if not, write to the Free Software Foundation, Inc., #ifndef fil0pagecompress_h #define fil0pagecompress_h +#ifndef UNIV_INNOCHECKSUM + #include "fsp0fsp.h" #include "fsp0pagecompress.h" @@ -68,23 +70,26 @@ fil_compress_page( ulint* out_len); /*!< out: actual length of compressed page */ -/****************************************************************//** +/** For page compressed pages decompress the page after actual read -operation. */ +operation. +@param[in,out] page_buf Preallocated temporal buffer where + compression is done and then copied + to the buffer. +@param[in,out] buf Compressed page and after suggesful + decompression operation uncompressed page + is copied here. +@param[in] len Length of output buffer. +@param[out] write_size Actual payload size of the compressed data. +@return true when operation succeeded or false when failed */ UNIV_INTERN -void +bool fil_decompress_page( -/*================*/ - byte* page_buf, /*!< in: preallocated buffer or NULL */ - byte* buf, /*!< out: buffer from which to read; in aio - this must be appropriately aligned */ - ulong len, /*!< in: length of output buffer.*/ - ulint* write_size, /*!< in/out: Actual payload size of - the compressed data. */ - bool return_error=false); - /*!< in: true if only an error should - be produced when decompression fails. - By default this parameter is false. */ + byte* page_buf, + byte* buf, + ulong len, + ulint* write_size) + MY_ATTRIBUTE((warn_unused_result)); /****************************************************************//** Get space id from fil node @@ -129,4 +134,25 @@ ibool fil_page_is_lzo_compressed( /*=======================*/ byte* buf); /*!< in: page */ -#endif +#endif /* !UNIV_INNOCHECKSUM */ + +/** +Verify that stored post compression checksum matches calculated +checksum. Note that old format did not have a checksum and +in that case either original pre-compression page checksum will +fail after decompression or page decompression fails. + +@param[in,out] page page frame +@param[in] space_id Tablespace identifier +@param[in] offset Page offset +@return true if post compression checksum matches, false otherwise */ +UNIV_INTERN +bool +fil_verify_compression_checksum( + const byte* page, + ulint space_id, + ulint offset) + MY_ATTRIBUTE((warn_unused_result)); + +#endif /* fil0pagecompress_h */ + |