/* UseMetaRevision
* opens indicated revision of metadata
* all non-zero revisions are read-only
*/
LIB_EXPORT rc_t CC SRATableUseMetaRevision ( const SRATable *cself, uint32_t revision )
{
rc_t rc;
if ( cself == NULL )
rc = RC ( rcSRA, rcTable, rcUpdating, rcSelf, rcNull );
else if ( cself -> read_only == false )
rc = RC ( rcSRA, rcTable, rcUpdating, rcMetadata, rcBusy );
else
{
uint32_t cur;
rc = KMetadataRevision ( cself -> meta, & cur );
if ( rc == 0 && cur != revision )
{
SRATable *self = ( SRATable* ) cself;
const KMetadata *meta;
rc = KMetadataOpenRevision ( self -> meta, & meta, revision );
if ( rc == 0 )
{
KMetadataRelease ( self -> meta );
self -> meta = meta;
}
}
}
return rc;
}
static rc_t copy_back_revisions ( const KMetadata *src_meta, VTable *dst_table,
const bool show_meta )
{
uint32_t max_revision, revision;
rc_t rc = KMetadataMaxRevision ( src_meta, &max_revision );
DISP_RC( rc, "copy_back_revisions:KMetadataMaxRevision() failed" );
if ( rc != 0 ) return rc;
if ( max_revision == 0 ) return rc;
for ( revision = 1; revision <= max_revision && rc == 0; ++revision )
{
const KMetadata *src_rev_meta;
if ( show_meta )
KOutMsg( "+++copy metadata rev. #%u:\n", revision );
rc = KMetadataOpenRevision ( src_meta, &src_rev_meta, revision );
DISP_RC( rc, "copy_back_revisions:KMetadataOpenRevision() failed" );
if ( rc == 0 )
{
KMetadata *dst_meta;
rc = VTableOpenMetadataUpdate ( dst_table, & dst_meta );
DISP_RC( rc, "copy_table_meta:VTableOpenMetadataUpdate() failed" );
if ( rc == 0 )
{
rc = copy_stray_metadata ( src_rev_meta, dst_meta, NULL, show_meta );
if ( rc == 0 )
{
rc = KMetadataCommit ( dst_meta );
DISP_RC( rc, "copy_back_revisions:KMetadataCommit() failed" );
if ( rc == 0 )
{
rc = KMetadataFreeze ( dst_meta );
DISP_RC( rc, "copy_back_revisions:KMetadataFreeze() failed" );
}
}
KMetadataRelease ( dst_meta );
}
KMetadataRelease ( src_rev_meta );
}
}
return rc;
}
/* OpenRevision
* opens a read-only indexed revision of metadata
*/
inline rc_t OpenRevision ( const KMetadata **meta, uint32_t revision ) const throw()
{ return KMetadataOpenRevision ( this, meta, revision ); }
