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skip LAYOUTRETURN if layout is invalid

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[ Upstream commit 93b7f7ad20 ]

Currently, when IO to DS fails, client returns the layout and
retries against the MDS. However, then on umounting (inode eviction)
it returns the layout again.

This is because pnfs_return_layout() was changed in
commit d78471d32b ("pnfs/blocklayout: set PNFS_LAYOUTRETURN_ON_ERROR")
to always set NFS_LAYOUT_RETURN_REQUESTED so even if we returned
the layout, it will be returned again. Instead, let's also check
if we have already marked the layout invalid.

Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Olga Kornievskaia 2018-06-11 15:32:06 -04:00 committed by Greg Kroah-Hartman
parent 0a84c912f5
commit 44a78f7d17
1 changed files with 4 additions and 2 deletions
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6
fs/nfs/pnfs.c
View file

@ -1126,7 +1126,7 @@ _pnfs_return_layout(struct inode *ino)
LIST_HEAD(tmp_list);
nfs4_stateid stateid;
int status = 0;
bool send;
bool send, valid_layout;
dprintk("NFS: %s for inode %lu\n", __func__, ino->i_ino);
@ -1147,6 +1147,7 @@ _pnfs_return_layout(struct inode *ino)
goto out_put_layout_hdr;
spin_lock(&ino->i_lock);
}
valid_layout = pnfs_layout_is_valid(lo);
pnfs_clear_layoutcommit(ino, &tmp_list);
pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL, 0);
@ -1160,7 +1161,8 @@ _pnfs_return_layout(struct inode *ino)
}
/* Don't send a LAYOUTRETURN if list was initially empty */
if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) {
if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags) ||
!valid_layout) {
spin_unlock(&ino->i_lock);
dprintk("NFS: %s no layout segments to return\n", __func__);
goto out_put_layout_hdr;