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Viewing changes to storage/innobase/fil/fil0fil.c

  • Committer: Clint Byrum
  • Date: 2012-02-15 01:24:19 UTC
  • mto: This revision was merged to the branch mainline in revision 10.
  • Revision ID: clint@ubuntu.com-20120215012419-upaezkp5ynk787ki
Import upstream version 5.5.20

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storage/innobase/fil/fil0fil.c
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}
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/*******************************************************************//**
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Reads the flushed lsn and arch no fields from a data file at database
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startup. */
 
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Reads the flushed lsn, arch no, and tablespace flag fields from a data
 
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file at database startup. */
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UNIV_INTERN
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void
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fil_read_flushed_lsn_and_arch_log_no(
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/*=================================*/
 
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fil_read_first_page(
 
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/*================*/
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        os_file_t       data_file,              /*!< in: open data file */
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        ibool           one_read_already,       /*!< in: TRUE if min and max
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                                                parameters below already
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                                                contain sensible data */
 
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        ulint*          flags,                  /*!< out: tablespace flags */
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#ifdef UNIV_LOG_ARCHIVE
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        ulint*          min_arch_log_no,        /*!< in/out: */
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        ulint*          max_arch_log_no,        /*!< in/out: */
 
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        ulint*          min_arch_log_no,        /*!< out: min of archived
 
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                                                log numbers in data files */
 
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        ulint*          max_arch_log_no,        /*!< out: max of archived
 
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                                                log numbers in data files */
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#endif /* UNIV_LOG_ARCHIVE */
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        ib_uint64_t*    min_flushed_lsn,        /*!< in/out: */
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        ib_uint64_t*    max_flushed_lsn)        /*!< in/out: */
 
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        ib_uint64_t*    min_flushed_lsn,        /*!< out: min of flushed
 
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                                                lsn values in data files */
 
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        ib_uint64_t*    max_flushed_lsn)        /*!< out: max of flushed
 
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                                                lsn values in data files */
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{
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        byte*           buf;
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        byte*           buf2;
 
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        page_t*         page;
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        ib_uint64_t     flushed_lsn;
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        buf2 = ut_malloc(2 * UNIV_PAGE_SIZE);
 
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        buf = ut_malloc(2 * UNIV_PAGE_SIZE);
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        /* Align the memory for a possible read from a raw device */
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        buf = ut_align(buf2, UNIV_PAGE_SIZE);
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        os_file_read(data_file, buf, 0, 0, UNIV_PAGE_SIZE);
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        flushed_lsn = mach_read_from_8(buf + FIL_PAGE_FILE_FLUSH_LSN);
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        ut_free(buf2);
 
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        page = ut_align(buf, UNIV_PAGE_SIZE);
 
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        os_file_read(data_file, page, 0, 0, UNIV_PAGE_SIZE);
 
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        *flags = mach_read_from_4(page +
 
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                FSP_HEADER_OFFSET + FSP_SPACE_FLAGS);
 
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        flushed_lsn = mach_read_from_8(page + FIL_PAGE_FILE_FLUSH_LSN);
 
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        ut_free(buf);
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        if (!one_read_already) {
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                *min_flushed_lsn = flushed_lsn;