/*
* THIS SHOULD BE REWRITTEN TO USE xfs_trans_next_item().
*
* This is typically called by the LM when a transaction has been fully
* committed to disk. It needs to unpin the items which have
* been logged by the transaction and update their positions
* in the AIL if necessary.
* This also gets called when the transactions didn't get written out
* because of an I/O error. Abortflag & XFS_LI_ABORTED is set then.
*
* Call xfs_trans_chunk_committed() to process the items in
* each chunk.
*/
STATIC void
xfs_trans_committed(
xfs_trans_t *tp,
int abortflag)
{
xfs_log_item_chunk_t *licp;
xfs_log_item_chunk_t *next_licp;
xfs_log_busy_chunk_t *lbcp;
xfs_log_busy_slot_t *lbsp;
int i;
/*
* Call the transaction's completion callback if there
* is one.
*/
if (tp->t_callback != NULL) {
tp->t_callback(tp, tp->t_callarg);
}
/*
* Special case the chunk embedded in the transaction.
*/
licp = &(tp->t_items);
if (!(XFS_LIC_ARE_ALL_FREE(licp))) {
xfs_trans_chunk_committed(licp, tp->t_lsn, abortflag);
}
/*
* Process the items in each chunk in turn.
*/
licp = licp->lic_next;
while (licp != NULL) {
ASSERT(!XFS_LIC_ARE_ALL_FREE(licp));
xfs_trans_chunk_committed(licp, tp->t_lsn, abortflag);
next_licp = licp->lic_next;
kmem_free(licp, sizeof(xfs_log_item_chunk_t));
licp = next_licp;
}
/*
* Clear all the per-AG busy list items listed in this transaction
*/
lbcp = &tp->t_busy;
while (lbcp != NULL) {
for (i = 0, lbsp = lbcp->lbc_busy; i < lbcp->lbc_unused; i++, lbsp++) {
if (!XFS_LBC_ISFREE(lbcp, i)) {
xfs_alloc_clear_busy(tp, lbsp->lbc_ag,
lbsp->lbc_idx);
}
}
lbcp = lbcp->lbc_next;
}
xfs_trans_free_busy(tp);
/*
* That's it for the transaction structure. Free it.
*/
xfs_trans_free(tp);
}
/*
* This is called to unlock the items associated with a transaction.
* Items which were not logged should be freed.
* Those which were logged must still be tracked so they can be unpinned
* when the transaction commits.
*/
void
xfs_trans_unlock_items(xfs_trans_t *tp, xfs_lsn_t commit_lsn)
{
xfs_log_item_chunk_t *licp;
xfs_log_item_chunk_t *next_licp;
xfs_log_item_chunk_t **licpp;
int freed;
freed = 0;
licp = &tp->t_items;
/*
* Special case the embedded chunk so we don't free.
*/
if (!XFS_LIC_ARE_ALL_FREE(licp)) {
freed = xfs_trans_unlock_chunk(licp, 0, 0, commit_lsn);
}
licpp = &(tp->t_items.lic_next);
licp = licp->lic_next;
/*
* Unlock each item in each chunk, free non-dirty descriptors,
* and free empty chunks.
*/
while (licp != NULL) {
ASSERT(!XFS_LIC_ARE_ALL_FREE(licp));
freed += xfs_trans_unlock_chunk(licp, 0, 0, commit_lsn);
next_licp = licp->lic_next;
if (XFS_LIC_ARE_ALL_FREE(licp)) {
*licpp = next_licp;
kmem_free(licp, sizeof(xfs_log_item_chunk_t));
freed -= XFS_LIC_NUM_SLOTS;
} else {
licpp = &(licp->lic_next);
}
ASSERT(*licpp == next_licp);
licp = next_licp;
}
/*
* Fix the free descriptor count in the transaction.
*/
tp->t_items_free += freed;
}
/*
* This is called to unlock all of the items of a transaction and to free
* all the descriptors of that transaction.
*
* It walks the list of descriptors and unlocks each item. It frees
* each chunk except that embedded in the transaction as it goes along.
*/
void
xfs_trans_free_items(
xfs_trans_t *tp,
int flags)
{
xfs_log_item_chunk_t *licp;
xfs_log_item_chunk_t *next_licp;
int abort;
abort = flags & XFS_TRANS_ABORT;
licp = &tp->t_items;
/*
* Special case the embedded chunk so we don't free it below.
*/
if (!XFS_LIC_ARE_ALL_FREE(licp)) {
(void) xfs_trans_unlock_chunk(licp, 1, abort, NULLCOMMITLSN);
XFS_LIC_ALL_FREE(licp);
licp->lic_unused = 0;
}
licp = licp->lic_next;
/*
* Unlock each item in each chunk and free the chunks.
*/
while (licp != NULL) {
ASSERT(!XFS_LIC_ARE_ALL_FREE(licp));
(void) xfs_trans_unlock_chunk(licp, 1, abort, NULLCOMMITLSN);
next_licp = licp->lic_next;
kmem_free(licp, sizeof(xfs_log_item_chunk_t));
licp = next_licp;
}
/*
* Reset the transaction structure's free item count.
*/
tp->t_items_free = XFS_LIC_NUM_SLOTS;
tp->t_items.lic_next = NULL;
}
/*ARGSUSED*/
xfs_log_item_desc_t *
xfs_trans_next_item(xfs_trans_t *tp, xfs_log_item_desc_t *lidp)
{
xfs_log_item_chunk_t *licp;
int i;
licp = XFS_LIC_DESC_TO_CHUNK(lidp);
/*
* First search the rest of the chunk. The for loop keeps us
* from referencing things beyond the end of the chunk.
*/
for (i = (int)XFS_LIC_DESC_TO_SLOT(lidp) + 1; i < licp->lic_unused; i++) {
if (XFS_LIC_ISFREE(licp, i)) {
continue;
}
return XFS_LIC_SLOT(licp, i);
}
/*
* Now search the next chunk. It must be there, because the
* next chunk would have been freed if it were empty.
* If there is no next chunk, return NULL.
*/
if (licp->lic_next == NULL) {
return NULL;
}
licp = licp->lic_next;
ASSERT(!XFS_LIC_ARE_ALL_FREE(licp));
for (i = 0; i < licp->lic_unused; i++) {
if (XFS_LIC_ISFREE(licp, i)) {
continue;
}
return XFS_LIC_SLOT(licp, i);
}
ASSERT(0);
/* NOTREACHED */
return NULL; /* keep gcc quite */
}
/*
* Free the given descriptor.
*
* This requires setting the bit in the chunk's free mask corresponding
* to the given slot.
*/
void
xfs_trans_free_item(xfs_trans_t *tp, xfs_log_item_desc_t *lidp)
{
uint slot;
xfs_log_item_chunk_t *licp;
xfs_log_item_chunk_t **licpp;
slot = XFS_LIC_DESC_TO_SLOT(lidp);
licp = XFS_LIC_DESC_TO_CHUNK(lidp);
XFS_LIC_RELSE(licp, slot);
lidp->lid_item->li_desc = NULL;
tp->t_items_free++;
/*
* If there are no more used items in the chunk and this is not
* the chunk embedded in the transaction structure, then free
* the chunk. First pull it from the chunk list and then
* free it back to the heap. We didn't bother with a doubly
* linked list here because the lists should be very short
* and this is not a performance path. It's better to save
* the memory of the extra pointer.
*
* Also decrement the transaction structure's count of free items
* by the number in a chunk since we are freeing an empty chunk.
*/
if (XFS_LIC_ARE_ALL_FREE(licp) && (licp != &(tp->t_items))) {
licpp = &(tp->t_items.lic_next);
while (*licpp != licp) {
ASSERT(*licpp != NULL);
licpp = &((*licpp)->lic_next);
}
*licpp = licp->lic_next;
kmem_free(licp, sizeof(xfs_log_item_chunk_t));
tp->t_items_free -= XFS_LIC_NUM_SLOTS;
}
}
int
xfs_lic_are_all_free(xfs_log_item_chunk_t *cp)
{
return XFS_LIC_ARE_ALL_FREE(cp);
}
