From: Trond Myklebust Date: Fri, 2 Jul 2021 23:48:41 +0000 (-0400) Subject: NFSv4/pnfs: Fix layoutget behaviour after invalidation X-Git-Tag: v5.14-rc1~38^2~4 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=0b77f97a7e42adc72bd566ff8cb733ea426f74f6;p=thirdparty%2Flinux.git NFSv4/pnfs: Fix layoutget behaviour after invalidation 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 --- diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index ffe02e43f8c08..be960e47d7f61 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); }