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authorTrond Myklebust <trondmy@gmail.com>2019-04-07 20:58:44 +0300
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2019-04-25 21:18:12 +0300
commitae67bd3821bb0a54d97e7883d211196637d487a9 (patch)
tree351a54fd10a71f6c76d5e8d8a8ce323c9252192e /fs/nfsd/nfs4callback.c
parent085b7755808aa11f78ab9377257e1dad2e6fa4bb (diff)
downloadlinux-ae67bd3821bb0a54d97e7883d211196637d487a9.tar.xz
SUNRPC: Fix up task signalling
The RPC_TASK_KILLED flag should really not be set from another context because it can clobber data in the struct task when task->tk_flags is changed non-atomically. Let's therefore swap out RPC_TASK_KILLED with an atomic flag, and add a function to set that flag and safely wake up the task. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'fs/nfsd/nfs4callback.c')
-rw-r--r--fs/nfsd/nfs4callback.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index d219159b98af..f7494be8dbe2 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -1032,7 +1032,7 @@ static bool nfsd4_cb_sequence_done(struct rpc_task *task, struct nfsd4_callback
* the submission code will error out, so we don't need to
* handle that case here.
*/
- if (task->tk_flags & RPC_TASK_KILLED)
+ if (RPC_SIGNALLED(task))
goto need_restart;
return true;
@@ -1081,7 +1081,7 @@ static bool nfsd4_cb_sequence_done(struct rpc_task *task, struct nfsd4_callback
dprintk("%s: freed slot, new seqid=%d\n", __func__,
clp->cl_cb_session->se_cb_seq_nr);
- if (task->tk_flags & RPC_TASK_KILLED)
+ if (RPC_SIGNALLED(task))
goto need_restart;
out:
return ret;