From nobody Mon Feb 9 07:07:47 2026 Received: from mail-ot1-f51.google.com (mail-ot1-f51.google.com [209.85.210.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 572B819F116; Mon, 21 Apr 2025 01:34:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745199267; cv=none; b=rya9oprqGFSSgE3Wd6NUunNu76LFT/TXak5iKxXbNnnsiLZ8JH4C6SBSDJDQQdq2wGpJzGFfLb1E6FNCGZbS13ATRSMYyiatNsO7i32KaC6gvdUhdMqPSOJQlopnHmYodH+WHETzNy6BktUmcP/J8jpt+JNWbhd4jfYcWSCe7wM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745199267; c=relaxed/simple; bh=oeJWVqoXTfM85DPBtFlVkuLxvj/f4i/x+rX/RZYjhZ8=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=m1FD6gETJqGiwoLqu3D654YXW3QVAHGk44kasHvE+cJBZuUlxhhPaI9C5Vc20YqGNZmjhwxrT/f9FYBvKXH9w5kLDLyALtR68cHEwCM+iqEAY0Kym7JGBWcZstu3qs0iHBfV1o7kGeEmEIc+7WBnOuvTepf/QWLomAYucmtW8GU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=Groves.net; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=kLR0akHF; arc=none smtp.client-ip=209.85.210.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=Groves.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="kLR0akHF" Received: by mail-ot1-f51.google.com with SMTP id 46e09a7af769-72ec58e45baso2259251a34.2; Sun, 20 Apr 2025 18:34:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1745199265; x=1745804065; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=zJTUPxCr5iXCtHx04L7AsNg2Bv7yPa69NQGQVSsPk1Y=; b=kLR0akHFQ0+52RWtD4lRShBqEAribyBdAVWv9fQh8vE8WLC3g8vyBWpHt/Gwgvow0M JXCQ0IAplJDmHQsxk4CViP7Nxu7GnaQnd7SPcrksJ1lEwlCmmF3y79RaZMc1BDeEKbPl 8gM4pFIXZjnraJ7DzswdoOOF9KiCclYAv12hUbiRw7jgLZ3ErgVDuhlpVT8izq5XnKhU Nv6fcMV3F/cdGWuv8a2s4+7WlR22vX5YAm4cdLB0ejmhczagnAuZZ0eFvhg8IuSW3tHk 5wdTJZb3vIB60R3jh8Y5/bDiRhRddQY6wh6tK30gWa8aNb/RXe0NnZTyvsEbqL5zOott gZOg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1745199265; x=1745804065; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=zJTUPxCr5iXCtHx04L7AsNg2Bv7yPa69NQGQVSsPk1Y=; b=BIaKNY3XZkyUNh03DkddMDPSsOsZdY2Lz4ga7TU8NJGGseP+wUWNxwyPp0ps1kpQ7l 3UQ2hHaL6I/F9v+VSkKt/n4GWagGKJ4zrzgC15LH7BDVtgfzkH05NAohSPJyXyh3LtUo rrsHZXURfD17EJw295fVIuF8k+g+upRNfN7yNuATQAT/jRi0oNo6/wy2pV0eJqy+h5ok rYAS1g8DUpL1CB6fPKiG/dfGzhTYRTSB+pGqtApaUYX7UhegTPkEk5z02188xCtjbpWz neaq9p0aoxC9pIe1p/Q6zlTO/ig+9ewheMioZyuctkauzT1QZVkS2ovdSgHIU9lzutXV 4UYw== X-Forwarded-Encrypted: i=1; AJvYcCUaDypVcEPor3eaiXKin36XuB7YpQu3mk6P0/NbxesnG/jvJGkxoISdC+z7Rw2JiYftRUVgAYll8egE@vger.kernel.org, AJvYcCVhz3ltE3McIFcdtpaPSVTT2F5q3iDMg0YYgbLY58TSx3A7NhKpncmcYm+cpxgRacmCEFe0uJOyaNs=@vger.kernel.org, AJvYcCW1cjoH0dafsGopPfW/2ei4Iu13OZiV1gSFR1bRO385K85uLy5rNHYmOU5c/okAV/EjHYnGZBkzDa6xrFwLtQ==@vger.kernel.org, AJvYcCWeOOBYyNLY09Q61Mi8Gui+PG68MiyiogWva3npDsbg0TzepGe/aIovNJmI8L8Sua1u9v1bbA+s70w3v2u9@vger.kernel.org X-Gm-Message-State: AOJu0YwBnlCudrXOZcKVG2UIkM6r/IOdCRW74245EBeEfcNALz+P5mQs onnJD/AxBbz7W4N9TEEReKM8+RNkSL7FyLOtoOGuTC15TCidjFZK X-Gm-Gg: ASbGncvCOGML/ZECNPXmTh/jx9sSlAnbPTNH8uwg8Y2vNonlebGwsTthW863gcOjtPt g0TgP1NK1deVtdJEsAnZR2Ks3NldzG9h/TLyNjmgd5QbmhrCPgRZe4FS3JxKXnVs9toAh7BTl+5 toxbFtScIWF/CApHs0hlrRHjzMFAKJdME5iBaOTYDaQB1bd4XDoKydWd0yFmCPTdftSL0yCjOrc 6nkylPIdeQh7xcet5US+RHcqF3kWQwkL4EoQKQoVhD6iMCaba6GSEeg8kSs2hKwbnK0udtrKu1K LylOvldc6u5gge+ADBeSFKFOPFCuPl2l6Dju6jOjXrF/HFBU6PCaITihuFId1uj7TYIRbw== X-Google-Smtp-Source: AGHT+IEeWI/ZWY1Oz4SEkKzVLnxG9+3nSwWecNs4VxQIfI4WYWMi4G/PZMw2CRTN5C5Uzp8choe8BQ== X-Received: by 2002:a05:6830:3902:b0:727:3e60:b44b with SMTP id 46e09a7af769-7300622c63dmr5997735a34.14.1745199265163; Sun, 20 Apr 2025 18:34:25 -0700 (PDT) Received: from localhost.localdomain ([2603:8080:1500:3d89:a8f7:1b36:93ce:8dbf]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-7300489cd44sm1267588a34.66.2025.04.20.18.34.23 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Sun, 20 Apr 2025 18:34:24 -0700 (PDT) Sender: John Groves From: John Groves X-Google-Original-From: John Groves To: John Groves , Dan Williams , Miklos Szeredi , Bernd Schubert Cc: John Groves , Jonathan Corbet , Vishal Verma , Dave Jiang , Matthew Wilcox , Jan Kara , Alexander Viro , Christian Brauner , "Darrick J . Wong" , Luis Henriques , Randy Dunlap , Jeff Layton , Kent Overstreet , Petr Vorel , Brian Foster , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, nvdimm@lists.linux.dev, linux-cxl@vger.kernel.org, linux-fsdevel@vger.kernel.org, Amir Goldstein , Jonathan Cameron , Stefan Hajnoczi , Joanne Koong , Josef Bacik , Aravind Ramesh , Ajay Joshi , John Groves Subject: [RFC PATCH 10/19] famfs_fuse: Basic fuse kernel ABI enablement for famfs Date: Sun, 20 Apr 2025 20:33:37 -0500 Message-Id: <20250421013346.32530-11-john@groves.net> X-Mailer: git-send-email 2.39.5 (Apple Git-154) In-Reply-To: <20250421013346.32530-1-john@groves.net> References: <20250421013346.32530-1-john@groves.net> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" * FUSE_DAX_FMAP flag in INIT request/reply * fuse_conn->famfs_iomap (enable famfs-mapped files) to denote a famfs-enabled connection Signed-off-by: John Groves --- fs/fuse/fuse_i.h | 3 +++ fs/fuse/inode.c | 5 +++++ include/uapi/linux/fuse.h | 2 ++ 3 files changed, 10 insertions(+) diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index e04d160fa995..b2c563b1a1c8 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -870,6 +870,9 @@ struct fuse_conn { /* Use io_uring for communication */ unsigned int io_uring; =20 + /* dev_dax_iomap support for famfs */ + unsigned int famfs_iomap:1; + /** Maximum stack depth for passthrough backing files */ int max_stack_depth; =20 diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index 29147657a99f..5c6947b12503 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -1392,6 +1392,9 @@ static void process_init_reply(struct fuse_mount *fm,= struct fuse_args *args, } if (flags & FUSE_OVER_IO_URING && fuse_uring_enabled()) fc->io_uring =3D 1; + if (IS_ENABLED(CONFIG_FUSE_FAMFS_DAX) && + flags & FUSE_DAX_FMAP) + fc->famfs_iomap =3D 1; } else { ra_pages =3D fc->max_read / PAGE_SIZE; fc->no_lock =3D 1; @@ -1450,6 +1453,8 @@ void fuse_send_init(struct fuse_mount *fm) flags |=3D FUSE_SUBMOUNTS; if (IS_ENABLED(CONFIG_FUSE_PASSTHROUGH)) flags |=3D FUSE_PASSTHROUGH; + if (IS_ENABLED(CONFIG_FUSE_FAMFS_DAX)) + flags |=3D FUSE_DAX_FMAP; =20 /* * This is just an information flag for fuse server. No need to check diff --git a/include/uapi/linux/fuse.h b/include/uapi/linux/fuse.h index 5e0eb41d967e..f9e14180367a 100644 --- a/include/uapi/linux/fuse.h +++ b/include/uapi/linux/fuse.h @@ -435,6 +435,7 @@ struct fuse_file_lock { * of the request ID indicates resend requests * FUSE_ALLOW_IDMAP: allow creation of idmapped mounts * FUSE_OVER_IO_URING: Indicate that client supports io-uring + * FUSE_DAX_FMAP: kernel supports dev_dax_iomap (aka famfs) fmaps */ #define FUSE_ASYNC_READ (1 << 0) #define FUSE_POSIX_LOCKS (1 << 1) @@ -482,6 +483,7 @@ struct fuse_file_lock { #define FUSE_DIRECT_IO_RELAX FUSE_DIRECT_IO_ALLOW_MMAP #define FUSE_ALLOW_IDMAP (1ULL << 40) #define FUSE_OVER_IO_URING (1ULL << 41) +#define FUSE_DAX_FMAP (1ULL << 42) =20 /** * CUSE INIT request/reply flags --=20 2.49.0