/******************************************************************
* NAME: scan_for_free_blocks
*
* FUNCTION: For each block on the sequential list of bad blocks,
* Attempt to allocate the block to the JFS Bad Block inode.
*
* If this succeeds, the block was not already allocated to
* and so no relocate was/is necessary. Remove the
* block from the sequential list. Notify the LVM
* that the bad LV blocks in this file system block
* can be removed from its list.
*
* Otherwise, the block is allocated to some inode. Leave
* it on the sequential list for relocation in a later
* step.
*
* PARAMETERS: none
*
* NOTES:
*
* RETURNS:
* success: 0
* failure: something else
*/
int32 scan_for_free_blocks()
{
int32 sffb_rc = 0;
int32 atb_rc = 0;
cbbl_bdblk_recptr bdblk_recptr, next_bdblk_recptr;
bdblk_recptr = agg_recptr->bdblk_baltree.seq_list;
while( bdblk_recptr != NULL ) {
next_bdblk_recptr = bdblk_recptr->next;
atb_rc = alloc_to_BBInode( bdblk_recptr );
if( atb_rc == 0 ) { /* the block is safely locked to the
* bad block inode
*/
sffb_rc = tell_LVM( bdblk_recptr );
if( sffb_rc == 0 ) {
sffb_rc = seqlist_remove( bdblk_recptr );
if( sffb_rc == 0 ) {
sffb_rc = freelist_insert( bdblk_recptr );
}
}
} /* end the block is safely locked to the bad block inode */
bdblk_recptr = next_bdblk_recptr;
}
return( sffb_rc );
} /* end scan_for_free_blocks() */
/****************************************************************************
* NAME: we_DidntTryTo_Relocate
*
* FUNCTION: For each entry (on the sequential list of bad blocks)
* which describes a block in the specified extent, remove
* the entry from the sequential list and tell the LVM to
* remove applicable entries from its bad block list
*
* PARAMETERS:
* ext_firstblk the first block in the extent
*
* ext_lastblk the last block in the extent
*
* bdblk_recptr ptr to the first record in the sequential list
* which describes a block in the extent
*
* NOTES: Since we weren't asked to relocate this extent, it
* must be allocated to the Bad Block Inode already.
*
* RETURNS:
* success: 0
* failure: something else
*/
int32 we_DidntTryTo_Relocate( int64 ext_firstblk,
int64 ext_lastblk,
cbbl_bdblk_recptr bdblk_recptr
)
{
int32 fnr_rc = 0;
int64 idx, block_limit;
int8 done;
cbbl_bdblk_recptr thisrec, nextrec;
done = 0;
block_limit = ext_lastblk + 1;
thisrec = bdblk_recptr;
for( idx = ext_firstblk;
((idx < block_limit) && (fnr_rc == 0) && (!done));
idx++ ) { /* process each fs block in the extent */
if( thisrec == NULL ) { /*
* no more in sequential list
*/
done = -1;
} /* end no more in sequential list */
else if( thisrec->fs_blkno > block_limit ) { /*
* no more in this extent
*/
done = -1;
} /* end no more in this extent */
else { /* there may be more bad blocks in this extent */
/*
* locate next on sequential list of bad blocks
*/
nextrec = thisrec->next;
if( thisrec->fs_blkno == idx ) { /* this is a bad block */
fnr_rc = tell_LVM( thisrec );
/*
* take the record off the sequential list and
* put it into the resolved blocks list.
*
* N.B. this record is STILL in the tree
*/
fnr_rc = seqlist_remove( thisrec );
fnr_rc = rslvdlist_insert( thisrec );
/*
* move on to next in sequential list
*/
thisrec = nextrec;
} /* end this is a bad block */
} /* end else there may be more bad blocks in this extent */
} /* end for idx = ... */
return( fnr_rc );
} /* end we_DidntTryTo_Relocate() */
/****************************************************************************
* NAME: we_Did_Relocate
*
* FUNCTION: For each entry (on the sequential list of bad blocks)
* which describes a block in the specified extent, attempt
* to allocate the block to the JFS Bad Block inode.
*
* If able to allocate the block to the Bad Block inode,
* remove the entry from the sequential list and tell the
* LVM to remove applicable entries from its bad block list
*
* If unable to allocate the block to the Bad Block inode,
* remove the entry from the sequential list and add it to
* the retry list. Increment counters as appropriate.
*
* PARAMETERS:
* ext_firstblk the first block in the extent which the caller
* has relocated
*
* ext_lastblk the last block in the extent which the caller
* has relocated
*
* bdblk_recptr ptr to the first record in the sequential list
* which describes a block in the extent which the
* caller has relocated
*
* NOTES:
*
* RETURNS:
* success: 0
* failure: something else
*/
int32 we_Did_Relocate( int64 ext_firstblk,
int64 ext_lastblk,
cbbl_bdblk_recptr bdblk_recptr
)
{
int32 fdr_rc = 0;
int64 idx, block_limit;
int8 done;
cbbl_bdblk_recptr thisrec, nextrec;
/*
* Increment # of relocated extents
*/
agg_recptr->reloc_extents += 1;
agg_recptr->reloc_blocks += ext_lastblk - ext_firstblk + 1;
done = 0;
block_limit = ext_lastblk + 1;
thisrec = bdblk_recptr;
for( idx = ext_firstblk;
((idx < block_limit) && (fdr_rc == 0) && (!done));
idx++ ) { /* process each fs block in the extent */
if( thisrec == NULL ) { /*
* no more in sequential list
*/
done = -1;
} /* end no more in sequential list */
else if( thisrec->fs_blkno > block_limit ) { /*
* no more in this extent
*/
done = -1;
} /* end no more in this extent */
else { /* there may be more bad blocks in this extent */
/*
* locate next on sequential list of bad blocks
*/
nextrec = thisrec->next;
if( thisrec->fs_blkno == idx ) { /* this is a bad block */
/*
* increment # times data relocated from this block
*/
thisrec->relocated_count += 1;
/*
* attempt to allocate the block to the
* JFS Bad Block inode
*/
fdr_rc = alloc_to_BBInode( thisrec );
if( fdr_rc != 0 ) { /*
* couldn't allocate the block
*/
fdr_rc = seqlist_remove( thisrec );
fdr_rc = retrylist_insert( thisrec );
thisrec->retry_list_count += 1;
thisrec->tooslow_count += 1;
} /* end couldn't allocate the block */
else { /*
* the block is allocated to the bad block inode
*/
fdr_rc = tell_LVM( thisrec );
/*
* take the record off the sequential list and
* put it into the resolved blocks list.
*
* N.B. this record is STILL in the tree
*/
fdr_rc = seqlist_remove( thisrec );
fdr_rc = rslvdlist_insert( thisrec );
} /* end else the block is allocated to the bad ... */
/*
* move on to next in sequential list
*/
thisrec = nextrec;
} /* end this is a bad block */
} /* end else there may be more bad blocks in this extent */
} /* end for idx = ... */
return( fdr_rc );
} /* end we_Did_Relocate() */
