/*
* Does the given AG have enough space to rebuild a btree? Neither AG
* reservation can be critical, and we must have enough space (factoring
* in AG reservations) to construct a whole btree.
*/
bool
xrep_ag_has_space(
struct xfs_perag *pag,
xfs_extlen_t nr_blocks,
enum xfs_ag_resv_type type)
{
return !xfs_ag_resv_critical(pag, XFS_AG_RESV_RMAPBT) &&
!xfs_ag_resv_critical(pag, XFS_AG_RESV_METADATA) &&
pag->pagf_freeblks > xfs_ag_resv_needed(pag, type) + nr_blocks;
}
/*
* Do we have enough reserve in this AG to handle a reflink? The refcount
* btree already reserved all the space it needs, but the rmap btree can grow
* infinitely, so we won't allow more reflinks when the AG is down to the
* btree reserves.
*/
static int
xfs_reflink_ag_has_free_space(
struct xfs_mount *mp,
xfs_agnumber_t agno)
{
struct xfs_perag *pag;
int error = 0;
if (!xfs_sb_version_hasrmapbt(&mp->m_sb))
return 0;
pag = xfs_perag_get(mp, agno);
if (xfs_ag_resv_critical(pag, XFS_AG_RESV_AGFL) ||
xfs_ag_resv_critical(pag, XFS_AG_RESV_METADATA))
error = -ENOSPC;
xfs_perag_put(pag);
return error;
}