1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>Functions</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux Filesystems API"><link rel="up" href="LinuxJDBAPI.html" title="Chapter 6. The Linux Journalling API"><link rel="prev" href="API-struct-journal-s.html" title="struct journal_s"><link rel="next" href="API-journal-init-dev.html" title="journal_init_dev"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Functions</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-struct-journal-s.html">Prev</a> </td><th width="60%" align="center">Chapter 6. The Linux Journalling API</th><td width="20%" align="right"> <a accesskey="n" href="API-journal-init-dev.html">Next</a></td></tr></table><hr></div><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="functions"></a>Functions</h2></div></div></div><div class="toc"><dl class="toc"><dt><span class="sect2"><a href="functions.html#journal_level">Journal Level</a></span></dt><dt><span class="sect2"><a href="functions.html#transaction_level">Transasction Level</a></span></dt></dl></div><p> 2 The functions here are split into two groups those that 3 affect a journal as a whole, and those which are used to 4 manage transactions 5 </p><div class="sect2"><div class="titlepage"><div><div><h3 class="title"><a name="journal_level"></a>Journal Level</h3></div></div></div><div class="toc"><dl class="toc"><dt><span class="refentrytitle"><a href="API-journal-init-dev.html"><span class="phrase">journal_init_dev</span></a></span><span class="refpurpose"> — 6 creates and initialises a journal structure 7 </span></dt><dt><span class="refentrytitle"><a href="API-journal-init-inode.html"><span class="phrase">journal_init_inode</span></a></span><span class="refpurpose"> — 8 creates a journal which maps to a inode. 9 </span></dt><dt><span class="refentrytitle"><a href="API-journal-create.html"><span class="phrase">journal_create</span></a></span><span class="refpurpose"> — 10 Initialise the new journal file 11 </span></dt><dt><span class="refentrytitle"><a href="API-journal-load.html"><span class="phrase">journal_load</span></a></span><span class="refpurpose"> — 12 Read journal from disk. 13 </span></dt><dt><span class="refentrytitle"><a href="API-journal-destroy.html"><span class="phrase">journal_destroy</span></a></span><span class="refpurpose"> — 14 Release a journal_t structure. 15 </span></dt><dt><span class="refentrytitle"><a href="API-journal-check-used-features.html"><span class="phrase">journal_check_used_features</span></a></span><span class="refpurpose"> — 16 Check if features specified are used. 17 </span></dt><dt><span class="refentrytitle"><a href="API-journal-check-available-features.html"><span class="phrase">journal_check_available_features</span></a></span><span class="refpurpose"> — 18 Check feature set in journalling layer 19 </span></dt><dt><span class="refentrytitle"><a href="API-journal-set-features.html"><span class="phrase">journal_set_features</span></a></span><span class="refpurpose"> — 20 Mark a given journal feature in the superblock 21 </span></dt><dt><span class="refentrytitle"><a href="API-journal-update-format.html"><span class="phrase">journal_update_format</span></a></span><span class="refpurpose"> — 22 Update on-disk journal structure. 23 </span></dt><dt><span class="refentrytitle"><a href="API-journal-flush.html"><span class="phrase">journal_flush</span></a></span><span class="refpurpose"> — 24 Flush journal 25 </span></dt><dt><span class="refentrytitle"><a href="API-journal-wipe.html"><span class="phrase">journal_wipe</span></a></span><span class="refpurpose"> — 26 Wipe journal contents 27 </span></dt><dt><span class="refentrytitle"><a href="API-journal-abort.html"><span class="phrase">journal_abort</span></a></span><span class="refpurpose"> — 28 Shutdown the journal immediately. 29 </span></dt><dt><span class="refentrytitle"><a href="API-journal-errno.html"><span class="phrase">journal_errno</span></a></span><span class="refpurpose"> — 30 returns the journal's error state. 31 </span></dt><dt><span class="refentrytitle"><a href="API-journal-clear-err.html"><span class="phrase">journal_clear_err</span></a></span><span class="refpurpose"> — 32 clears the journal's error state 33 </span></dt><dt><span class="refentrytitle"><a href="API-journal-ack-err.html"><span class="phrase">journal_ack_err</span></a></span><span class="refpurpose"> — 34 Ack journal err. 35 </span></dt><dt><span class="refentrytitle"><a href="API-journal-recover.html"><span class="phrase">journal_recover</span></a></span><span class="refpurpose"> — 36 recovers a on-disk journal 37 </span></dt><dt><span class="refentrytitle"><a href="API-journal-skip-recovery.html"><span class="phrase">journal_skip_recovery</span></a></span><span class="refpurpose"> — 38 Start journal and wipe exiting records 39 </span></dt></dl></div></div><div class="sect2"><div class="titlepage"><div><div><h3 class="title"><a name="transaction_level"></a>Transasction Level</h3></div></div></div><div class="toc"><dl class="toc"><dt><span class="refentrytitle"><a href="API-journal-start.html"><span class="phrase">journal_start</span></a></span><span class="refpurpose"> — 40 Obtain a new handle. 41 </span></dt><dt><span class="refentrytitle"><a href="API-journal-extend.html"><span class="phrase">journal_extend</span></a></span><span class="refpurpose"> — 42 extend buffer credits. 43 </span></dt><dt><span class="refentrytitle"><a href="API-journal-restart.html"><span class="phrase">journal_restart</span></a></span><span class="refpurpose"> — 44 restart a handle. 45 </span></dt><dt><span class="refentrytitle"><a href="API-journal-lock-updates.html"><span class="phrase">journal_lock_updates</span></a></span><span class="refpurpose"> — 46 establish a transaction barrier. 47 </span></dt><dt><span class="refentrytitle"><a href="API-journal-unlock-updates.html"><span class="phrase">journal_unlock_updates</span></a></span><span class="refpurpose"> — 48 release barrier 49 </span></dt><dt><span class="refentrytitle"><a href="API-journal-get-write-access.html"><span class="phrase">journal_get_write_access</span></a></span><span class="refpurpose"> — 50 notify intent to modify a buffer for metadata (not data) update. 51 </span></dt><dt><span class="refentrytitle"><a href="API-journal-get-create-access.html"><span class="phrase">journal_get_create_access</span></a></span><span class="refpurpose"> — 52 notify intent to use newly created bh 53 </span></dt><dt><span class="refentrytitle"><a href="API-journal-get-undo-access.html"><span class="phrase">journal_get_undo_access</span></a></span><span class="refpurpose"> — 54 Notify intent to modify metadata with non-rewindable consequences 55 </span></dt><dt><span class="refentrytitle"><a href="API-journal-dirty-data.html"><span class="phrase">journal_dirty_data</span></a></span><span class="refpurpose"> — 56 mark a buffer as containing dirty data to be flushed 57 </span></dt><dt><span class="refentrytitle"><a href="API-journal-dirty-metadata.html"><span class="phrase">journal_dirty_metadata</span></a></span><span class="refpurpose"> — 58 mark a buffer as containing dirty metadata 59 </span></dt><dt><span class="refentrytitle"><a href="API-journal-forget.html"><span class="phrase">journal_forget</span></a></span><span class="refpurpose"> — 60 <code class="function">bforget</code> for potentially-journaled buffers. 61 </span></dt><dt><span class="refentrytitle"><a href="API-journal-stop.html"><span class="phrase">journal_stop</span></a></span><span class="refpurpose"> — 62 complete a transaction 63 </span></dt><dt><span class="refentrytitle"><a href="API-journal-force-commit.html"><span class="phrase">journal_force_commit</span></a></span><span class="refpurpose"> — 64 force any uncommitted transactions 65 </span></dt><dt><span class="refentrytitle"><a href="API-journal-try-to-free-buffers.html"><span class="phrase">journal_try_to_free_buffers</span></a></span><span class="refpurpose"> — 66 try to free page buffers. 67 </span></dt><dt><span class="refentrytitle"><a href="API-journal-invalidatepage.html"><span class="phrase">journal_invalidatepage</span></a></span><span class="refpurpose"> — 68 invalidate a journal page 69 </span></dt></dl></div></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-struct-journal-s.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="LinuxJDBAPI.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" 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