This is a note to let you know that I've just added the patch titled NFSv4/pnfs: Fix layoutget behaviour after invalidation to the 5.13-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: nfsv4-pnfs-fix-layoutget-behaviour-after-invalidatio.patch and it can be found in the queue-5.13 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 9d0cd6fa01cd0f2e78ab9887c1db093b07e446a7 Author: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx> Date: Fri Jul 2 19:48:41 2021 -0400 NFSv4/pnfs: Fix layoutget behaviour after invalidation [ Upstream commit 0b77f97a7e42adc72bd566ff8cb733ea426f74f6 ] If the layout gets invalidated, we should wait for any outstanding layoutget requests for that layout to complete, and we should resend them only after re-establishing the layout stateid. Fixes: d29b468da4f9 ("pNFS/NFSv4: Improve rejection of out-of-order layouts") Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index ffe02e43f8c0..be960e47d7f6 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -2014,7 +2014,7 @@ lookup_again: * If the layout segment list is empty, but there are outstanding * layoutget calls, then they might be subject to a layoutrecall. */ - if (list_empty(&lo->plh_segs) && + if ((list_empty(&lo->plh_segs) || !pnfs_layout_is_valid(lo)) && atomic_read(&lo->plh_outstanding) != 0) { spin_unlock(&ino->i_lock); lseg = ERR_PTR(wait_var_event_killable(&lo->plh_outstanding, @@ -2390,11 +2390,13 @@ pnfs_layout_process(struct nfs4_layoutget *lgp) goto out_forget; } + if (!pnfs_layout_is_valid(lo) && !pnfs_is_first_layoutget(lo)) + goto out_forget; + if (nfs4_stateid_match_other(&lo->plh_stateid, &res->stateid)) { /* existing state ID, make sure the sequence number matches. */ if (pnfs_layout_stateid_blocked(lo, &res->stateid)) { - if (!pnfs_layout_is_valid(lo) && - pnfs_is_first_layoutget(lo)) + if (!pnfs_layout_is_valid(lo)) lo->plh_barrier = 0; dprintk("%s forget reply due to sequence\n", __func__); goto out_forget; @@ -2413,8 +2415,6 @@ pnfs_layout_process(struct nfs4_layoutget *lgp) goto out_forget; } else { /* We have a completely new layout */ - if (!pnfs_is_first_layoutget(lo)) - goto out_forget; pnfs_set_layout_stateid(lo, &res->stateid, lgp->cred, true); }