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pnfs: Use byte-range for cb_layoutrecall

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Use recalled range to invalidate particular layout segments in the layout cache.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
This commit is contained in:
Benny Halevy
2011-05-22 19:48:02 +03:00
committed by Boaz Harrosh
parent 707ed5fdb5
commit 778b5502fd
3 changed files with 12 additions and 9 deletions
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15
fs/nfs/pnfs.c
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@@ -321,10 +321,12 @@ lo_seg_intersecting(struct pnfs_layout_range *l1,
}
static bool
should_free_lseg(u32 lseg_iomode, u32 recall_iomode)
should_free_lseg(struct pnfs_layout_range *lseg_range,
struct pnfs_layout_range *recall_range)
{
return (recall_iomode == IOMODE_ANY ||
lseg_iomode == recall_iomode);
return (recall_range->iomode == IOMODE_ANY ||
lseg_range->iomode == recall_range->iomode) &&
lo_seg_intersecting(lseg_range, recall_range);
}
/* Returns 1 if lseg is removed from list, 0 otherwise */
@@ -355,7 +357,7 @@ static int mark_lseg_invalid(struct pnfs_layout_segment *lseg,
int
mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
struct list_head *tmp_list,
u32 iomode)
struct pnfs_layout_range *recall_range)
{
struct pnfs_layout_segment *lseg, *next;
int invalid = 0, removed = 0;
@@ -368,7 +370,8 @@ mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
return 0;
}
list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list)
if (should_free_lseg(lseg->pls_range.iomode, iomode)) {
if (!recall_range ||
should_free_lseg(&lseg->pls_range, recall_range)) {
dprintk("%s: freeing lseg %p iomode %d "
"offset %llu length %llu\n", __func__,
lseg, lseg->pls_range.iomode, lseg->pls_range.offset,
@@ -417,7 +420,7 @@ pnfs_destroy_layout(struct nfs_inode *nfsi)
lo = nfsi->layout;
if (lo) {
lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */
mark_matching_lsegs_invalid(lo, &tmp_list, IOMODE_ANY);
mark_matching_lsegs_invalid(lo, &tmp_list, NULL);
}
spin_unlock(&nfsi->vfs_inode.i_lock);
pnfs_free_lseg_list(&tmp_list);