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Message-Id: <20250924-dir-deleg-v3-24-9f3af8bc5c40@kernel.org>
Date: Wed, 24 Sep 2025 14:06:10 -0400
From: Jeff Layton <jlayton@...nel.org>
To: Alexander Viro <viro@...iv.linux.org.uk>,
Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>,
Chuck Lever <chuck.lever@...cle.com>,
Alexander Aring <alex.aring@...il.com>,
Trond Myklebust <trondmy@...nel.org>, Anna Schumaker <anna@...nel.org>,
Steve French <sfrench@...ba.org>,
Ronnie Sahlberg <ronniesahlberg@...il.com>,
Shyam Prasad N <sprasad@...rosoft.com>, Tom Talpey <tom@...pey.com>,
Bharath SM <bharathsm@...rosoft.com>, NeilBrown <neil@...wn.name>,
Olga Kornievskaia <okorniev@...hat.com>, Dai Ngo <Dai.Ngo@...cle.com>,
Jonathan Corbet <corbet@....net>, Amir Goldstein <amir73il@...il.com>,
Miklos Szeredi <miklos@...redi.hu>, Paulo Alcantara <pc@...guebit.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
"Rafael J. Wysocki" <rafael@...nel.org>, Danilo Krummrich <dakr@...nel.org>,
David Howells <dhowells@...hat.com>, Tyler Hicks <code@...icks.com>,
Namjae Jeon <linkinjeon@...nel.org>, Steve French <smfrench@...il.com>,
Sergey Senozhatsky <senozhatsky@...omium.org>,
Carlos Maiolino <cem@...nel.org>, Steven Rostedt <rostedt@...dmis.org>,
Masami Hiramatsu <mhiramat@...nel.org>,
Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
Paulo Alcantara <pc@...guebit.org>
Cc: Rick Macklem <rick.macklem@...il.com>, linux-fsdevel@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-nfs@...r.kernel.org,
linux-cifs@...r.kernel.org, samba-technical@...ts.samba.org,
linux-doc@...r.kernel.org, netfs@...ts.linux.dev, ecryptfs@...r.kernel.org,
linux-unionfs@...r.kernel.org, linux-xfs@...r.kernel.org,
linux-trace-kernel@...r.kernel.org, Jeff Layton <jlayton@...nel.org>
Subject: [PATCH v3 24/38] nfsd: make nfsd4_callback_ops->prepare operation
bool return
For a CB_NOTIFY operation, we need to stop processing the callback
if an allocation fails. Change the ->prepare callback operation to
return true if processing should continue, and false otherwise.
Signed-off-by: Jeff Layton <jlayton@...nel.org>
---
fs/nfsd/nfs4callback.c | 5 ++++-
fs/nfsd/nfs4layouts.c | 3 ++-
fs/nfsd/nfs4state.c | 6 ++++--
fs/nfsd/state.h | 6 +++---
4 files changed, 13 insertions(+), 7 deletions(-)
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index e00b2aea8da2b93f366d88888f404734953f1942..d13a4819d764269338f2b05a05f975c037e589af 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -1739,7 +1739,10 @@ nfsd4_run_cb_work(struct work_struct *work)
if (!test_and_clear_bit(NFSD4_CALLBACK_REQUEUE, &cb->cb_flags)) {
if (cb->cb_ops && cb->cb_ops->prepare)
- cb->cb_ops->prepare(cb);
+ if (!cb->cb_ops->prepare(cb)) {
+ nfsd41_destroy_cb(cb);
+ return;
+ }
}
cb->cb_msg.rpc_cred = clp->cl_cb_cred;
diff --git a/fs/nfsd/nfs4layouts.c b/fs/nfsd/nfs4layouts.c
index 683bd1130afe298f9df774684192c89f68102b72..1916e5541153126edc357cfeeff9ce30461b69c0 100644
--- a/fs/nfsd/nfs4layouts.c
+++ b/fs/nfsd/nfs4layouts.c
@@ -652,7 +652,7 @@ nfsd4_cb_layout_fail(struct nfs4_layout_stateid *ls, struct nfsd_file *file)
}
}
-static void
+static bool
nfsd4_cb_layout_prepare(struct nfsd4_callback *cb)
{
struct nfs4_layout_stateid *ls =
@@ -661,6 +661,7 @@ nfsd4_cb_layout_prepare(struct nfsd4_callback *cb)
mutex_lock(&ls->ls_mutex);
nfs4_inc_and_copy_stateid(&ls->ls_recall_sid, &ls->ls_stid);
mutex_unlock(&ls->ls_mutex);
+ return true;
}
static int
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index eac9e9360e568caf1f615d230cff39e022107f12..517ba5595da3be5e130e1978ba30235496efbe01 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -361,12 +361,13 @@ remove_blocked_locks(struct nfs4_lockowner *lo)
}
}
-static void
+static bool
nfsd4_cb_notify_lock_prepare(struct nfsd4_callback *cb)
{
struct nfsd4_blocked_lock *nbl = container_of(cb,
struct nfsd4_blocked_lock, nbl_cb);
locks_delete_block(&nbl->nbl_lock);
+ return true;
}
static int
@@ -5450,7 +5451,7 @@ bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, struct inode *inode)
return timeo > 0;
}
-static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb)
+static bool nfsd4_cb_recall_prepare(struct nfsd4_callback *cb)
{
struct nfs4_delegation *dp = cb_to_delegation(cb);
struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net,
@@ -5471,6 +5472,7 @@ static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb)
list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru);
}
spin_unlock(&state_lock);
+ return true;
}
static int nfsd4_cb_recall_done(struct nfsd4_callback *cb,
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index b052c1effdc5356487c610db9728df8ecfe851d4..bacb9f9eff3aaf7076d53f06826026569a567bd9 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -98,9 +98,9 @@ struct nfsd4_callback {
};
struct nfsd4_callback_ops {
- void (*prepare)(struct nfsd4_callback *);
- int (*done)(struct nfsd4_callback *, struct rpc_task *);
- void (*release)(struct nfsd4_callback *);
+ bool (*prepare)(struct nfsd4_callback *cb);
+ int (*done)(struct nfsd4_callback *cb, struct rpc_task *task);
+ void (*release)(struct nfsd4_callback *cb);
uint32_t opcode;
};
--
2.51.0
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