/*
* like unpin only we have to also clear the xaction descriptor
* pointing the log item if we free the item. This routine duplicates
* unpin because efi_flags is protected by the AIL lock. Freeing
* the descriptor and then calling unpin would force us to drop the AIL
* lock which would open up a race condition.
*/
STATIC void
xfs_efi_item_unpin_remove(xfs_efi_log_item_t *efip, xfs_trans_t *tp)
{
xfs_mount_t *mp;
xfs_log_item_desc_t *lidp;
SPLDECL(s);
mp = efip->efi_item.li_mountp;
AIL_LOCK(mp, s);
if (efip->efi_flags & XFS_EFI_CANCELED) {
/*
* free the xaction descriptor pointing to this item
*/
lidp = xfs_trans_find_item(tp, (xfs_log_item_t *) efip);
xfs_trans_free_item(tp, lidp);
/*
* pull the item off the AIL.
* xfs_trans_delete_ail() drops the AIL lock.
*/
xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s);
xfs_efi_item_free(efip);
} else {
efip->efi_flags |= XFS_EFI_COMMITTED;
AIL_UNLOCK(mp, s);
}
}
/*
* like unpin only we have to also clear the xaction descriptor
* pointing the log item if we free the item. This routine duplicates
* unpin because efi_flags is protected by the AIL lock. Freeing
* the descriptor and then calling unpin would force us to drop the AIL
* lock which would open up a race condition.
*/
STATIC void
xfs_efi_item_unpin_remove(xfs_efi_log_item_t *efip, xfs_trans_t *tp)
{
int nexts;
int size;
xfs_mount_t *mp;
xfs_log_item_desc_t *lidp;
SPLDECL(s);
mp = efip->efi_item.li_mountp;
AIL_LOCK(mp, s);
if (efip->efi_flags & XFS_EFI_CANCELED) {
/*
* free the xaction descriptor pointing to this item
*/
lidp = xfs_trans_find_item(tp, (xfs_log_item_t *) efip);
xfs_trans_free_item(tp, lidp);
/*
* pull the item off the AIL.
* xfs_trans_delete_ail() drops the AIL lock.
*/
xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s);
/*
* now free the item itself
*/
nexts = efip->efi_format.efi_nextents;
if (nexts > XFS_EFI_MAX_FAST_EXTENTS) {
size = sizeof(xfs_efi_log_item_t);
size += (nexts - 1) * sizeof(xfs_extent_t);
kmem_free(efip, size);
} else {
kmem_zone_free(xfs_efi_zone, efip);
}
} else {
efip->efi_flags |= XFS_EFI_COMMITTED;
AIL_UNLOCK(mp, s);
}
return;
}
/*
* like unpin only we have to also clear the xaction descriptor
* pointing the log item if we free the item. This routine duplicates
* unpin because efi_flags is protected by the AIL lock. Freeing
* the descriptor and then calling unpin would force us to drop the AIL
* lock which would open up a race condition.
*/
STATIC void
xfs_efi_item_unpin_remove(xfs_efi_log_item_t *efip, xfs_trans_t *tp)
{
struct xfs_ail *ailp = efip->efi_item.li_ailp;
xfs_log_item_desc_t *lidp;
spin_lock(&ailp->xa_lock);
if (efip->efi_flags & XFS_EFI_CANCELED) {
/*
* free the xaction descriptor pointing to this item
*/
lidp = xfs_trans_find_item(tp, (xfs_log_item_t *) efip);
xfs_trans_free_item(tp, lidp);
/* xfs_trans_ail_delete() drops the AIL lock. */
xfs_trans_ail_delete(ailp, (xfs_log_item_t *)efip);
xfs_efi_item_free(efip);
} else {
efip->efi_flags |= XFS_EFI_COMMITTED;
spin_unlock(&ailp->xa_lock);
}
}
/*
* Release the inode ip which was previously acquired with xfs_trans_iget()
* or added with xfs_trans_ijoin(). This will decrement the lock
* recursion count of the inode item. If the count goes to less than 0,
* the inode will be unlocked and disassociated from the transaction.
*
* If the inode has been modified within the transaction, it will not be
* unlocked until the transaction commits.
*/
void
xfs_trans_iput(
xfs_trans_t *tp,
xfs_inode_t *ip,
uint lock_flags)
{
xfs_inode_log_item_t *iip;
xfs_log_item_desc_t *lidp;
/*
* If the transaction pointer is NULL, just call xfs_iput().
*/
if (tp == NULL) {
xfs_iput(ip, lock_flags);
}
ASSERT(ip->i_transp == tp);
iip = ip->i_itemp;
ASSERT(iip != NULL);
/*
* Find the item descriptor pointing to this inode's
* log item. It must be there.
*/
lidp = xfs_trans_find_item(tp, (xfs_log_item_t*)iip);
ASSERT(lidp != NULL);
ASSERT(lidp->lid_item == (xfs_log_item_t*)iip);
/*
* Be consistent about the bookkeeping for the inode's
* io lock, but it doesn't mean much really.
*/
ASSERT((iip->ili_flags & XFS_ILI_IOLOCKED_ANY) != XFS_ILI_IOLOCKED_ANY);
if (lock_flags & (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED)) {
ASSERT(iip->ili_flags & XFS_ILI_IOLOCKED_ANY);
ASSERT((!(lock_flags & XFS_IOLOCK_EXCL)) ||
(iip->ili_flags & XFS_ILI_IOLOCKED_EXCL));
ASSERT((!(lock_flags & XFS_IOLOCK_SHARED)) ||
(iip->ili_flags &
(XFS_ILI_IOLOCKED_EXCL | XFS_ILI_IOLOCKED_SHARED)));
if (iip->ili_iolock_recur > 0) {
iip->ili_iolock_recur--;
}
}
/*
* If the release is just for a recursive lock on the inode lock,
* then decrement the count and return. We can assert that
* the caller is dropping an EXCL lock on the inode, because
* inode must be locked EXCL within transactions.
*/
ASSERT(lock_flags & XFS_ILOCK_EXCL);
if (iip->ili_ilock_recur > 0) {
iip->ili_ilock_recur--;
return;
}
ASSERT(iip->ili_iolock_recur == 0);
/*
* If the inode was dirtied within this transaction, it cannot
* be released until the transaction commits.
*/
if (lidp->lid_flags & XFS_LID_DIRTY) {
return;
}
xfs_trans_free_item(tp, lidp);
/*
* Clear the hold and iolocked flags in the inode log item.
* We wouldn't want the next user of the inode to
* get confused. Assert that if the iolocked flag is set
* in the item then we are unlocking it in the call to xfs_iput()
* below.
*/
ASSERT((!(iip->ili_flags & XFS_ILI_IOLOCKED_ANY)) ||
(lock_flags & (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED)));
if (iip->ili_flags & (XFS_ILI_HOLD | XFS_ILI_IOLOCKED_ANY)) {
iip->ili_flags &= ~(XFS_ILI_HOLD | XFS_ILI_IOLOCKED_ANY);
}
/*
* Unlike xfs_brelse() the inode log item cannot be
* freed, because it is embedded within the inode.
* All we have to do is release the inode.
*/
xfs_iput(ip, lock_flags);
return;
}
