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pNFS: Don't clear the layout return info if there are segments to return

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In pnfs_clear_layoutreturn_info, ensure that we don't clear the layout
return info if there are new segments queued for return due to, for
instance, a race between a LAYOUTRETURN and a failed I/O attempt.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust 2017-05-01 17:03:44 -04:00
parent 1f18b82c34
commit 5466d21411
1 changed files with 7 additions and 1 deletions
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8
fs/nfs/pnfs.c
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@ -322,9 +322,15 @@ pnfs_set_plh_return_info(struct pnfs_layout_hdr *lo, enum pnfs_iomode iomode,
static void
pnfs_clear_layoutreturn_info(struct pnfs_layout_hdr *lo)
{
struct pnfs_layout_segment *lseg;
lo->plh_return_iomode = 0;
lo->plh_return_seq = 0;
clear_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags);
list_for_each_entry(lseg, &lo->plh_segs, pls_list) {
if (!test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags))
continue;
pnfs_set_plh_return_info(lo, lseg->pls_range.iomode, 0);
}
}
static void pnfs_clear_layoutreturn_waitbit(struct pnfs_layout_hdr *lo)
@ -367,9 +373,9 @@ pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo,
struct pnfs_layout_segment *lseg, *next;
set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
pnfs_clear_layoutreturn_info(lo);
list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list)
pnfs_clear_lseg_state(lseg, lseg_list);
pnfs_clear_layoutreturn_info(lo);
pnfs_free_returned_lsegs(lo, lseg_list, &range, 0);
if (test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags) &&
!test_and_set_bit(NFS_LAYOUT_RETURN_LOCK, &lo->plh_flags))