From 9a9a0d900ed17ebab94121291c58891d2d5b975a Mon Sep 17 00:00:00 2001 From: Marc Dionne Date: Fri, 12 Apr 2019 16:34:02 +0100 Subject: [PATCH] afs: Check for rxrpc call completion in wait loop Check the state of the rxrpc call backing an afs call in each iteration of the call wait loop in case the rxrpc call has already been terminated at the rxrpc layer. Interrupt the wait loop and mark the afs call as complete if the rxrpc layer call is complete. There were cases where rxrpc errors were not passed up to afs, which could result in this loop waiting forever for an afs call to transition to AFS_CALL_COMPLETE while the rx call was already complete. Signed-off-by: Marc Dionne Signed-off-by: David Howells Signed-off-by: David S. Miller --- fs/afs/rxrpc.c | 22 ++++++++++++++++------ 1 file changed, 16 insertions(+), 6 deletions(-) diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c index 5cb11aff92980..c14001b42d200 100644 --- a/fs/afs/rxrpc.c +++ b/fs/afs/rxrpc.c @@ -610,6 +610,7 @@ static long afs_wait_for_call_to_complete(struct afs_call *call, bool stalled = false; u64 rtt; u32 life, last_life; + bool rxrpc_complete = false; DECLARE_WAITQUEUE(myself, current); @@ -639,7 +640,12 @@ static long afs_wait_for_call_to_complete(struct afs_call *call, if (afs_check_call_state(call, AFS_CALL_COMPLETE)) break; - rxrpc_kernel_check_life(call->net->socket, call->rxcall, &life); + if (!rxrpc_kernel_check_life(call->net->socket, call->rxcall, &life)) { + /* rxrpc terminated the call. */ + rxrpc_complete = true; + break; + } + if (timeout == 0 && life == last_life && signal_pending(current)) { if (stalled) @@ -663,12 +669,16 @@ static long afs_wait_for_call_to_complete(struct afs_call *call, remove_wait_queue(&call->waitq, &myself); __set_current_state(TASK_RUNNING); - /* Kill off the call if it's still live. */ if (!afs_check_call_state(call, AFS_CALL_COMPLETE)) { - _debug("call interrupted"); - if (rxrpc_kernel_abort_call(call->net->socket, call->rxcall, - RX_USER_ABORT, -EINTR, "KWI")) - afs_set_call_complete(call, -EINTR, 0); + if (rxrpc_complete) { + afs_set_call_complete(call, call->error, call->abort_code); + } else { + /* Kill off the call if it's still live. */ + _debug("call interrupted"); + if (rxrpc_kernel_abort_call(call->net->socket, call->rxcall, + RX_USER_ABORT, -EINTR, "KWI")) + afs_set_call_complete(call, -EINTR, 0); + } } spin_lock_bh(&call->state_lock); -- 2.39.5