linux-kernel - [PATCH v3 21/38] nfsd: allow nfsd to get a dir lease with an ignore mask

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Message-Id: <20250924-dir-deleg-v3-21-9f3af8bc5c40@kernel.org>
Date: Wed, 24 Sep 2025 14:06:07 -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 21/38] nfsd: allow nfsd to get a dir lease with an
 ignore mask

When requesting a directory lease, enable the FL_IGN_DIR_* bits that
correspond to the requested notification types.

Signed-off-by: Jeff Layton <jlayton@...nel.org>
---
 fs/nfsd/nfs4state.c | 27 +++++++++++++++++++++------
 1 file changed, 21 insertions(+), 6 deletions(-)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index d1d586ec0e4e2bef908dc0671c34edab9cad5ba2..e219556e0959dbf0a8147d5edbb725da125a978f 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -5937,14 +5937,30 @@ static bool nfsd4_cb_channel_good(struct nfs4_client *clp)
 	return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN;
 }

-static struct file_lease *nfs4_alloc_init_lease(struct nfs4_delegation *dp)
+static unsigned int
+nfsd_notify_to_ignore(u32 notify)
+{
+	unsigned int mask = 0;
+
+	if (notify & BIT(NOTIFY4_REMOVE_ENTRY))
+		mask |= FL_IGN_DIR_DELETE;
+	if (notify & BIT(NOTIFY4_ADD_ENTRY))
+		mask |= FL_IGN_DIR_CREATE;
+	if (notify & BIT(NOTIFY4_RENAME_ENTRY))
+		mask |= FL_IGN_DIR_RENAME;
+
+	return mask;
+}
+
+static struct file_lease *nfs4_alloc_init_lease(struct nfs4_delegation *dp, u32 notify)
 {
 	struct file_lease *fl;

 	fl = locks_alloc_lease();
 	if (!fl)
 		return NULL;
-	fl->c.flc_flags = FL_DELEG;
+
+	fl->c.flc_flags = FL_DELEG | nfsd_notify_to_ignore(notify);
 	fl->c.flc_type = deleg_is_read(dp->dl_type) ? F_RDLCK : F_WRLCK;
 	fl->c.flc_owner = (fl_owner_t)dp;
 	fl->c.flc_pid = current->tgid;
@@ -6161,7 +6177,7 @@ nfs4_set_delegation(struct nfsd4_open *open, struct nfs4_ol_stateid *stp,
 	if (!dp)
 		goto out_delegees;

-	fl = nfs4_alloc_init_lease(dp);
+	fl = nfs4_alloc_init_lease(dp, 0);
 	if (!fl)
 		goto out_clnt_odstate;

@@ -9468,12 +9484,11 @@ nfsd_get_dir_deleg(struct nfsd4_compound_state *cstate,
 	if (!dp)
 		goto out_delegees;

-	fl = nfs4_alloc_init_lease(dp);
+	fl = nfs4_alloc_init_lease(dp, gdd->gddr_notification[0]);
 	if (!fl)
 		goto out_put_stid;

-	status = kernel_setlease(nf->nf_file,
-				 fl->c.flc_type, &fl, NULL);
+	status = kernel_setlease(nf->nf_file, fl->c.flc_type, &fl, NULL);
 	if (fl)
 		locks_free_lease(fl);
 	if (status)

-- 
2.51.0