From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E09CB125A0; Thu, 25 Sep 2025 17:15:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758820559; cv=none; b=KV+MGs+KECVEfIrjSR8Btf1IV9bAbxG5r3kjRfCOEOlef2ISAkM9wbqz3pGRNRG9DW7scZXrC9qcnPdffGxKBzXLK4L5QO4UyXMTRSadsT9d47ZZxhAY8fx3Zscg7V26pgwpPO9dH7ZtqO3lhDskNtKoKSUlMGQ3TWjokFUsk1w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758820559; c=relaxed/simple; bh=9E/YarR1AvErY3Hcy0HXVAIjT+5GipGA6Rrdw49owKc=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=SWgBvQVjwXj1o8m6Xo8JvPaCubi9fBzQguMx/E25fSKrGyOZpnbUd681E/Wzm4IlTW4sUHdTl6qUtE9CUUK8Wnbg1VXhBnkcAxO+/zkwiYSn7UU1WjckMbPY0Pvt59OqoOWW2jIhb7AXkLPEotpjU12mav75hXCyv2miMXoUBUU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=kdU0ZkTf; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="kdU0ZkTf" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 615F9C4CEF4; Thu, 25 Sep 2025 17:15:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1758820558; bh=9E/YarR1AvErY3Hcy0HXVAIjT+5GipGA6Rrdw49owKc=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=kdU0ZkTfzaBQHMEcB5lcNWndfks/mhZyClmDQxA0ck71wvhUJH23AukGvLIGCbcsX hcTqui5pg5CqWDBaQqaKz7AgrAnmBdyYpLYBgiv/HuJalzQdYxU7ECtQEOCOLldaUG 0LLyWKCYMG6cYdu8Yje3H8W7RbbFLe+19Fa6vBayDMxXLEvPbKrQ5LE+KXwwx1hVjl mW3Wck0PNt5MjP77YOC9exxU/96M6ziYLwfFcaIgY18LTnYWrVDDMnNSqexdVycl+Z e5+HLgXixc1vQs+ACWvh2VJ32muj4xmPcDL9TQ8gsM6jwOrf41G8PS0CWxDxx9Ztqt OkI8QEK0Mlk5w== Message-ID: <8e5d91125e171f8ee3cd6a10dfb47a6d25fb83c9.camel@kernel.org> Subject: Re: [PATCH v3 27/38] nfsd: add notification handlers for dir events From: Jeff Layton To: Alexander Viro , Christian Brauner , Jan Kara , Chuck Lever , Alexander Aring , Trond Myklebust , Anna Schumaker , Steve French , Ronnie Sahlberg , Shyam Prasad N , Tom Talpey , Bharath SM , NeilBrown , Olga Kornievskaia , Dai Ngo , Jonathan Corbet , Amir Goldstein , Miklos Szeredi , Paulo Alcantara , Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich , David Howells , Tyler Hicks , Namjae Jeon , Steve French , Sergey Senozhatsky , Carlos Maiolino , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers Cc: Rick Macklem , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, samba-technical@lists.samba.org, linux-doc@vger.kernel.org, netfs@lists.linux.dev, ecryptfs@vger.kernel.org, linux-unionfs@vger.kernel.org, linux-xfs@vger.kernel.org, linux-trace-kernel@vger.kernel.org Date: Thu, 25 Sep 2025 13:15:54 -0400 In-Reply-To: <20250924-dir-deleg-v3-27-9f3af8bc5c40@kernel.org> References: <20250924-dir-deleg-v3-0-9f3af8bc5c40@kernel.org> <20250924-dir-deleg-v3-27-9f3af8bc5c40@kernel.org> Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; keydata=mQINBE6V0TwBEADXhJg7s8wFDwBMEvn0qyhAnzFLTOCHooMZyx7XO7dAiIhDSi7G1NPxw n8jdFUQMCR/GlpozMFlSFiZXiObE7sef9rTtM68ukUyZM4pJ9l0KjQNgDJ6Fr342Htkjxu/kFV1Wv 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linux-cifs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Wed, 2025-09-24 at 14:06 -0400, Jeff Layton wrote: > Add the necessary parts to accept a fsnotify callback for directory > change event and create a CB_NOTIFY request for it. When a dir nfsd_file > is created set a handle_event callback to handle the notification. >=20 > Use that to allocate a nfsd_notify_event object and then hand off a > reference to each delegation's CB_NOTIFY. If anything fails along the > way, recall any affected delegations. >=20 > Signed-off-by: Jeff Layton > --- > fs/nfsd/filecache.c | 51 ++++++++++---- > fs/nfsd/nfs4callback.c | 19 +++-- > fs/nfsd/nfs4state.c | 185 +++++++++++++++++++++++++++++++++++++++++++= ++++++ > fs/nfsd/nfs4xdr.c | 95 +++++++++++++++++++++++++ > fs/nfsd/state.h | 2 + > fs/nfsd/xdr4.h | 2 + > 6 files changed, 337 insertions(+), 17 deletions(-) >=20 [...] > + > +int > +nfsd_handle_dir_event(u32 mask, const struct inode *dir, const void *dat= a, > + int data_type, const struct qstr *name) > +{ > + struct dentry *dentry =3D fsnotify_data_dentry(data, data_type); > + struct file_lock_context *ctx; > + struct file_lock_core *flc; > + struct nfsd_notify_event *evt; > + > + ctx =3D locks_inode_context(dir); > + if (!ctx || list_empty(&ctx->flc_lease)) > + return 0; > + > + evt =3D alloc_nfsd_notify_event(mask, name, dentry); > + if (!evt) { > + nfsd_recall_all_dir_delegs(dir); > + return 0; > + } > + > + spin_lock(&ctx->flc_lock); > + list_for_each_entry(flc, &ctx->flc_lease, flc_list) { > + struct file_lease *fl =3D container_of(flc, struct file_lease, c); > + struct nfs4_delegation *dp =3D flc->flc_owner; > + struct nfsd4_cb_notify *ncn =3D &dp->dl_cb_notify; > + > + if (!should_notify_deleg(mask, fl)) > + continue; > + > + spin_lock(&ncn->ncn_lock); > + if (ncn->ncn_evt_cnt >=3D NOTIFY4_EVENT_QUEUE_SIZE) { > + /* We're generating notifications too fast. Recall. */ > + spin_unlock(&ncn->ncn_lock); > + nfsd_break_deleg_cb(fl); > + continue; > + } > + ncn->ncn_evt[ncn->ncn_evt_cnt++] =3D nfsd_notify_event_get(evt); The above nfsd_notify_event_get() causes a refcount leak. Fixed in tree. --=20 Jeff Layton