/*
* Increment the pin count of the given dquot.
* This value is protected by pinlock spinlock in the xQM structure.
*/
STATIC void
xfs_qm_dquot_logitem_pin(
xfs_dq_logitem_t *logitem)
{
unsigned long s;
xfs_dquot_t *dqp;
dqp = logitem->qli_dquot;
ASSERT(XFS_DQ_IS_LOCKED(dqp));
s = XFS_DQ_PINLOCK(dqp);
dqp->q_pincount++;
XFS_DQ_PINUNLOCK(dqp, s);
}
/*
* Decrement the pin count of the given dquot, and wake up
* anyone in xfs_dqwait_unpin() if the count goes to 0. The
* dquot must have been previously pinned with a call to xfs_dqpin().
*/
STATIC void
xfs_qm_dquot_logitem_unpin(
xfs_dq_logitem_t *logitem)
{
int s;
xfs_dquot_t *dqp;
dqp = logitem->qli_dquot;
ASSERT(dqp->q_pincount > 0);
s = XFS_DQ_PINLOCK(dqp);
dqp->q_pincount--;
if (dqp->q_pincount == 0) {
sv_broadcast(&dqp->q_pinwait);
}
XFS_DQ_PINUNLOCK(dqp, s);
}
/*
* This is called to wait for the given dquot to be unpinned.
* Most of these pin/unpin routines are plagiarized from inode code.
*/
void
xfs_qm_dqunpin_wait(
xfs_dquot_t *dqp)
{
SPLDECL(s);
ASSERT(XFS_DQ_IS_LOCKED(dqp));
if (dqp->q_pincount == 0) {
return;
}
/*
* Give the log a push so we don't wait here too long.
*/
xfs_log_force(dqp->q_mount, (xfs_lsn_t)0, XFS_LOG_FORCE);
s = XFS_DQ_PINLOCK(dqp);
if (dqp->q_pincount == 0) {
XFS_DQ_PINUNLOCK(dqp, s);
return;
}
sv_wait(&(dqp->q_pinwait), PINOD,
&(XFS_DQ_TO_QINF(dqp)->qi_pinlock), s);
}
