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pNFS: Ignore non-recalled layouts in pnfs_layout_need_return()

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If a layout has been recalled, then we should fire off a layoutreturn as
soon as all the layout segments that match the recall have been retired.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2018-06-23 16:55:37 -04:00
parent 00bcbe119f
commit f0b429819b
1 changed files with 10 additions and 1 deletions
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11
fs/nfs/pnfs.c
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@ -1160,12 +1160,21 @@ static bool
pnfs_layout_need_return(struct pnfs_layout_hdr *lo)
{
struct pnfs_layout_segment *s;
enum pnfs_iomode iomode;
u32 seq;
if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags))
return false;
/* Defer layoutreturn until all lsegs are done */
seq = lo->plh_return_seq;
iomode = lo->plh_return_iomode;
/* Defer layoutreturn until all recalled lsegs are done */
list_for_each_entry(s, &lo->plh_segs, pls_list) {
if (seq && pnfs_seqid_is_newer(s->pls_seq, seq))
continue;
if (iomode != IOMODE_ANY && s->pls_range.iomode != iomode)
continue;
if (test_bit(NFS_LSEG_LAYOUTRETURN, &s->pls_flags))
return false;
}