recovery.c File Reference

#include "jfs_user.h"

Go to the source code of this file.

Data Structures
struct	recovery_info

Macros
#define	wrap(journal, var)

Enumerations
enum	passtype {   PASS_SCAN, PASS_REVOKE, PASS_REPLAY, PASS_SCAN,   PASS_REVOKE, PASS_REPLAY }

Functions
int	journal_recover (journal_t *journal)
int	journal_skip_recovery (journal_t *journal)

Macro Definition Documentation

#define wrap	(		journal,
			var
	)

Value:

do {                                    \
    if (var >= (journal)->j_last)                   \
        var -= ((journal)->j_last - (journal)->j_first);    \
} while (0)

Definition at line 206 of file recovery.c.

Enumeration Type Documentation

enum passtype

Enumerator:

PASS_SCAN
PASS_REVOKE
PASS_REPLAY
PASS_SCAN
PASS_REVOKE
PASS_REPLAY

Definition at line 40 of file recovery.c.

Function Documentation

int journal_recover

(

journal_t *

journal

)

journal_recover - recovers a on-disk journal : the journal to recover

The primary function for recovering the log contents when mounting a journaled device.

Recovery is done in three passes. In the first pass, we look for the end of the log. In the second, we assemble the list of revoke blocks. In the third and final pass, we replay any un-revoked blocks in the log.

Definition at line 224 of file recovery.c.

int journal_skip_recovery

(

journal_t *

journal

)

journal_skip_recovery - Start journal and wipe exiting records : journal to startup

Locate any valid recovery information from the journal and set up the journal structures in memory to ignore it (presumably because the caller has evidence that it is out of date). This function does'nt appear to be exorted..

We perform one pass over the journal to allow us to tell the user how much recovery information is being erased, and to let us initialise the journal transaction sequence numbers to the next unused ID.

Definition at line 290 of file recovery.c.