/*
* __split_ovfl_key_cleanup --
* Handle cleanup for on-page row-store overflow keys.
*/
static int
__split_ovfl_key_cleanup(WT_SESSION_IMPL *session, WT_PAGE *page, WT_REF *ref)
{
WT_CELL *cell;
WT_CELL_UNPACK kpack;
WT_IKEY *ikey;
uint32_t cell_offset;
/*
* A key being discarded (page split) or moved to a different page (page
* deepening) may be an on-page overflow key. Clear any reference to an
* underlying disk image, and, if the key hasn't been deleted, delete it
* along with any backing blocks.
*/
if ((ikey = __wt_ref_key_instantiated(ref)) == NULL)
return (0);
if ((cell_offset = ikey->cell_offset) == 0)
return (0);
/* Leak blocks rather than try this twice. */
ikey->cell_offset = 0;
cell = WT_PAGE_REF_OFFSET(page, cell_offset);
__wt_cell_unpack(cell, &kpack);
if (kpack.ovfl && kpack.raw != WT_CELL_KEY_OVFL_RM)
WT_RET(__wt_ovfl_discard(session, cell));
return (0);
}
/*
* __split_ovfl_key_cleanup --
* Handle cleanup for on-page row-store overflow keys.
*/
static int
__split_ovfl_key_cleanup(WT_SESSION_IMPL *session, WT_PAGE *page, WT_REF *ref)
{
WT_CELL *cell;
WT_CELL_UNPACK kpack;
WT_IKEY *ikey;
uint32_t cell_offset;
/* There's a per-page flag if there are any overflow keys at all. */
if (!F_ISSET_ATOMIC(page, WT_PAGE_OVERFLOW_KEYS))
return (0);
/*
* A key being discarded (page split) or moved to a different page (page
* deepening) may be an on-page overflow key. Clear any reference to an
* underlying disk image, and, if the key hasn't been deleted, delete it
* along with any backing blocks.
*/
if ((ikey = __wt_ref_key_instantiated(ref)) == NULL)
return (0);
if ((cell_offset = ikey->cell_offset) == 0)
return (0);
/* Leak blocks rather than try this twice. */
ikey->cell_offset = 0;
cell = WT_PAGE_REF_OFFSET(page, cell_offset);
__wt_cell_unpack(cell, &kpack);
if (kpack.ovfl && kpack.raw != WT_CELL_KEY_OVFL_RM) {
/*
* Eviction cannot free overflow items once a checkpoint is
* running in a tree: that can corrupt the checkpoint's block
* management. Assert that checkpoints aren't running to make
* sure we're catching all paths and to avoid regressions.
*/
WT_ASSERT(session,
S2BT(session)->checkpointing != WT_CKPT_RUNNING);
WT_RET(__wt_ovfl_discard(session, cell));
}
return (0);
}
/*
* __ovfl_discard_wrapup --
* Resolve the page's overflow discard list after a page is written.
*/
static int
__ovfl_discard_wrapup(WT_SESSION_IMPL *session, WT_PAGE *page)
{
WT_CELL **cellp;
WT_DECL_RET;
WT_OVFL_TRACK *track;
uint32_t i;
track = page->modify->ovfl_track;
for (i = 0, cellp = track->discard;
i < track->discard_entries; ++i, ++cellp) {
if (WT_VERBOSE_ISSET(session, WT_VERB_OVERFLOW))
WT_RET(__ovfl_discard_verbose(
session, page, *cellp, "free"));
/* Discard each cell's overflow item. */
WT_RET(__wt_ovfl_discard(session, *cellp));
}
__wt_free(session, track->discard);
track->discard_entries = track->discard_allocated = 0;
return (ret);
}
