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Commit f7db0b28 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

pNFS: Fix LAYOUTGET handling of NFS4ERR_BAD_STATEID and NFS4ERR_EXPIRED 



We want to recover the open stateid if there is no layout stateid
and/or the stateid argument matches an open stateid.
Otherwise throw out the existing layout and recover from scratch, as
the layout stateid is bad.

Fixes: 183d9e7b ("pnfs: rework LAYOUTGET retry handling")
Cc: stable@vger.kernel.org # 4.7
Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
Reviewed-by: default avatarJeff Layton <jlayton@redhat.com>
parent 66b53f32

fs/nfs/nfs4proc.c

+15 −19
Original line number Diff line number Diff line
@@ -7886,6 +7886,7 @@ nfs4_layoutget_handle_exception(struct rpc_task *task, 
	struct pnfs_layout_hdr *lo;

	int nfs4err = task->tk_status;

	int err, status = 0;

	LIST_HEAD(head);



	dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
@@ -7930,21 +7931,18 @@ nfs4_layoutget_handle_exception(struct rpc_task *task, 
	case -NFS4ERR_BAD_STATEID:

		exception->timeout = 0;

		spin_lock(&inode->i_lock);

		if (nfs4_stateid_match(&lgp->args.stateid,

		lo = NFS_I(inode)->layout;

		/* If the open stateid was bad, then recover it. */

		if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||

		    nfs4_stateid_match_other(&lgp->args.stateid,

					&lgp->args.ctx->state->stateid)) {

			spin_unlock(&inode->i_lock);

			/* If the open stateid was bad, then recover it. */

			exception->state = lgp->args.ctx->state;

			break;

		}

		lo = NFS_I(inode)->layout;

		if (lo && !test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) &&

		    nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) {

			LIST_HEAD(head);



		/*

		 * Mark the bad layout state as invalid, then retry

			 * with the current stateid.

		 */

		set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);

		pnfs_mark_matching_lsegs_invalid(lo, &head, NULL, 0);
@@ -7952,8 +7950,6 @@ nfs4_layoutget_handle_exception(struct rpc_task *task, 
		pnfs_free_lseg_list(&head);

		status = -EAGAIN;

		goto out;

		} else

			spin_unlock(&inode->i_lock);

	}



	err = nfs4_handle_exception(server, nfs4err, exception);