From 24311f884189d42d40354a6f38ca218eb9aeb811 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sun, 20 Sep 2015 10:50:17 -0400 Subject: NFSv4: Recovery of recalled read delegations is broken When a read delegation is being recalled, and we're reclaiming the cached opens, we need to make sure that we only reclaim read-only modes. A previous attempt to do this, relied on retrieving the delegation type from the nfs4_opendata structure. Unfortunately, as Kinglong pointed out, this field can only be set when performing reboot recovery. Furthermore, if we call nfs4_open_recover(), then we end up clobbering the state->flags for all modes that we're not recovering... The fix is to have the delegation recall code pass this information to the recovery call, and then refactor the recovery code so that nfs4_open_delegation_recall() does not need to call nfs4_open_recover(). Reported-by: Kinglong Mee Fixes: 39f897fdbd46 ("NFSv4: When returning a delegation, don't...") Tested-by: Kinglong Mee Cc: NeilBrown Cc: stable@vger.kernel.org # v4.2+ Signed-off-by: Trond Myklebust --- fs/nfs/delegation.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/nfs/delegation.h') diff --git a/fs/nfs/delegation.h b/fs/nfs/delegation.h index a44829173e57..333063e032f0 100644 --- a/fs/nfs/delegation.h +++ b/fs/nfs/delegation.h @@ -54,7 +54,7 @@ void nfs_delegation_reap_unclaimed(struct nfs_client *clp); /* NFSv4 delegation-related procedures */ int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync); -int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid); +int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid, fmode_t type); int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid); bool nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode, fmode_t flags); -- cgit v1.2.3