From patchwork Mon Sep 26 23:18:13 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Rosenberg X-Patchwork-Id: 12989544 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D202CC32771 for ; Mon, 26 Sep 2022 23:21:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231374AbiIZXU7 (ORCPT ); Mon, 26 Sep 2022 19:20:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36696 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231153AbiIZXTc (ORCPT ); Mon, 26 Sep 2022 19:19:32 -0400 Received: from mail-pj1-x1049.google.com (mail-pj1-x1049.google.com [IPv6:2607:f8b0:4864:20::1049]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 97511EBD6B for ; Mon, 26 Sep 2022 16:19:15 -0700 (PDT) Received: by mail-pj1-x1049.google.com with SMTP id pv6-20020a17090b3c8600b0020596077a91so2785087pjb.8 for ; Mon, 26 Sep 2022 16:19:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date; bh=kEarMH2WfphhfcixiUioZfkeGDc7VISdu5Tdeqb4x7c=; b=AtpxV+bkSVPVBumpFA8NL3O5PdL4P2ugp9l2yKdDoH6Eh9aj5TRzQlagKazNsSDUTv f061wC6lkKahu/896JKL9vcoUIuCa5QWVclYiesoHq04oaUL1fqA6haevUQOnnOjC2ga A4RUm3tYkCoPpaZ3x4sszS1aIKuHL0K2vwCxC3zFqBprGu1J5Ked5iVqtDDSm0rcUIuH SQ6V83DEmrUuZHVpz4M+hgMtaMFOWjQb8HELRU4KuAVpHm44JfjY+8VmbgrbQGRd8rTc Us2bHH6IP2/L3N6LKvZRpu6sSUYa5YCeQVjf4/RHGDr+QKp0DADEmC6wsu6GgYp1jjOX rOHA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date; bh=kEarMH2WfphhfcixiUioZfkeGDc7VISdu5Tdeqb4x7c=; b=kbPfnqOHFMYcSeSVGpnks1OifBAgrxmRkiRAndp/nC0xF25kC4nX4sCy+nGzR1U/K+ GU58mTOIaU1riZRpFqM1P3PzT4Hu8ABHK6ZocB8E1HYjMZNgw6OYlThFyrrgNZ2zS0PV eemto7U/Ut7owt6wh6qm5Z5PuX+Ug9bng0fOSTDWWaU4wDNnWXQhQfD2C/k2XiK/m6Xr hBWlWUYzfJIfuQccf+hvzLRzSZxOip1Y0QqQ4fLqnIYoaMbKhh8LJVMxvR9nMtlkSr9L t0W3E6VFywEqTSRQY0IuKvGAiNWLDH94Y3+Okuh1LTtrCfWptFs0zuPXbqYBQbCC0EGm h6Mg== X-Gm-Message-State: ACrzQf0VTozQ/oihWs9efoOBm0t2KGEKWQdkzkcD6luhjzw9rpuOEcEC wZG+gNCe/ASl8aoO/XcRzIt2ClfLJJ4= X-Google-Smtp-Source: AMsMyM5/oyD0bCiBdDXDpgXSCvKMRAmdu33hy9rbdcT2L4rxi8lIxmO9pBBG+gtLhahpwNgnT1nJrCJF9qM= X-Received: from drosen.mtv.corp.google.com ([2620:15c:211:200:4643:a68e:2b7:f873]) (user=drosen job=sendgmr) by 2002:a17:90a:4607:b0:202:e22d:489c with SMTP id w7-20020a17090a460700b00202e22d489cmr1229712pjg.80.1664234355074; Mon, 26 Sep 2022 16:19:15 -0700 (PDT) Date: Mon, 26 Sep 2022 16:18:13 -0700 In-Reply-To: <20220926231822.994383-1-drosen@google.com> Mime-Version: 1.0 References: <20220926231822.994383-1-drosen@google.com> X-Mailer: git-send-email 2.37.3.998.g577e59143f-goog Message-ID: <20220926231822.994383-18-drosen@google.com> Subject: [PATCH 17/26] fuse-bpf: Add support for sync operations From: Daniel Rosenberg To: Miklos Szeredi , Alexei Starovoitov , Daniel Borkmann , John Fastabend Cc: Andrii Nakryiko , Martin KaFai Lau , Song Liu , Yonghong Song , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Daniel Rosenberg , Paul Lawrence , Alessio Balsini , David Anderson , Sandeep Patil , linux-fsdevel@vger.kernel.org, bpf@vger.kernel.org, kernel-team@android.com Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Signed-off-by: Daniel Rosenberg Signed-off-by: Paul Lawrence --- fs/fuse/backing.c | 117 ++++++++++++++++++++++++++++++++++++++++++++++ fs/fuse/dir.c | 8 ++++ fs/fuse/file.c | 17 +++++++ fs/fuse/fuse_i.h | 21 +++++++++ 4 files changed, 163 insertions(+) diff --git a/fs/fuse/backing.c b/fs/fuse/backing.c index a31199064dc7..4fd7442c94a1 100644 --- a/fs/fuse/backing.c +++ b/fs/fuse/backing.c @@ -436,6 +436,49 @@ int fuse_release_finalize(struct bpf_fuse_args *fa, int *out, return 0; } +int fuse_flush_initialize_in(struct bpf_fuse_args *fa, struct fuse_flush_in *ffi, + struct file *file, fl_owner_t id) +{ + struct fuse_file *fuse_file = file->private_data; + + *ffi = (struct fuse_flush_in) { + .fh = fuse_file->fh, + }; + + *fa = (struct bpf_fuse_args) { + .nodeid = get_node_id(file->f_inode), + .opcode = FUSE_FLUSH, + .in_numargs = 1, + .in_args[0].size = sizeof(*ffi), + .in_args[0].value = ffi, + .flags = FUSE_BPF_FORCE, + }; + + return 0; +} + +int fuse_flush_initialize_out(struct bpf_fuse_args *fa, struct fuse_flush_in *ffi, + struct file *file, fl_owner_t id) +{ + return 0; +} + +int fuse_flush_backing(struct bpf_fuse_args *fa, int *out, struct file *file, fl_owner_t id) +{ + struct fuse_file *fuse_file = file->private_data; + struct file *backing_file = fuse_file->backing_file; + + *out = 0; + if (backing_file->f_op->flush) + *out = backing_file->f_op->flush(backing_file, id); + return *out; +} + +int fuse_flush_finalize(struct bpf_fuse_args *fa, int *out, struct file *file, fl_owner_t id) +{ + return 0; +} + int fuse_lseek_initialize_in(struct bpf_fuse_args *fa, struct fuse_lseek_io *flio, struct file *file, loff_t offset, int whence) { @@ -510,6 +553,80 @@ int fuse_lseek_finalize(struct bpf_fuse_args *fa, loff_t *out, return 0; } +int fuse_fsync_initialize_in(struct bpf_fuse_args *fa, struct fuse_fsync_in *ffi, + struct file *file, loff_t start, loff_t end, int datasync) +{ + struct fuse_file *fuse_file = file->private_data; + + *ffi = (struct fuse_fsync_in) { + .fh = fuse_file->fh, + .fsync_flags = datasync ? FUSE_FSYNC_FDATASYNC : 0, + }; + + *fa = (struct bpf_fuse_args) { + .nodeid = get_fuse_inode(file->f_inode)->nodeid, + .opcode = FUSE_FSYNC, + .in_numargs = 1, + .in_args[0].size = sizeof(*ffi), + .in_args[0].value = ffi, + .flags = FUSE_BPF_FORCE, + }; + + return 0; +} + +int fuse_fsync_initialize_out(struct bpf_fuse_args *fa, struct fuse_fsync_in *ffi, + struct file *file, loff_t start, loff_t end, int datasync) +{ + return 0; +} + +int fuse_fsync_backing(struct bpf_fuse_args *fa, int *out, + struct file *file, loff_t start, loff_t end, int datasync) +{ + struct fuse_file *fuse_file = file->private_data; + struct file *backing_file = fuse_file->backing_file; + const struct fuse_fsync_in *ffi = fa->in_args[0].value; + int new_datasync = (ffi->fsync_flags & FUSE_FSYNC_FDATASYNC) ? 1 : 0; + + *out = vfs_fsync(backing_file, new_datasync); + return 0; +} + +int fuse_fsync_finalize(struct bpf_fuse_args *fa, int *out, + struct file *file, loff_t start, loff_t end, int datasync) +{ + return 0; +} + +int fuse_dir_fsync_initialize_in(struct bpf_fuse_args *fa, struct fuse_fsync_in *ffi, + struct file *file, loff_t start, loff_t end, int datasync) +{ + struct fuse_file *fuse_file = file->private_data; + + *ffi = (struct fuse_fsync_in) { + .fh = fuse_file->fh, + .fsync_flags = datasync ? FUSE_FSYNC_FDATASYNC : 0, + }; + + *fa = (struct bpf_fuse_args) { + .nodeid = get_fuse_inode(file->f_inode)->nodeid, + .opcode = FUSE_FSYNCDIR, + .in_numargs = 1, + .in_args[0].size = sizeof(*ffi), + .in_args[0].value = ffi, + .flags = FUSE_BPF_FORCE, + }; + + return 0; +} + +int fuse_dir_fsync_initialize_out(struct bpf_fuse_args *fa, struct fuse_fsync_in *ffi, + struct file *file, loff_t start, loff_t end, int datasync) +{ + return 0; +} + static inline void fuse_bpf_aio_put(struct fuse_bpf_aio_req *aio_req) { if (refcount_dec_and_test(&aio_req->ref)) diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index d8237b7a23f2..f159b9a6d305 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -1638,6 +1638,14 @@ static int fuse_dir_fsync(struct file *file, loff_t start, loff_t end, if (fuse_is_bad(inode)) return -EIO; +#ifdef CONFIG_FUSE_BPF + if (fuse_bpf_backing(inode, struct fuse_fsync_in, err, + fuse_dir_fsync_initialize_in, fuse_dir_fsync_initialize_out, + fuse_fsync_backing, fuse_fsync_finalize, + file, start, end, datasync)) + return err; +#endif + if (fc->no_fsyncdir) return 0; diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 443f1af8a431..fc8f8e3a06b3 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -513,6 +513,15 @@ static int fuse_flush(struct file *file, fl_owner_t id) FUSE_ARGS(args); int err; +#ifdef CONFIG_FUSE_BPF + if (fuse_bpf_backing(file->f_inode, struct fuse_flush_in, err, + fuse_flush_initialize_in, fuse_flush_initialize_out, + fuse_flush_backing, + fuse_flush_finalize, + file, id)) + return err; +#endif + if (fuse_is_bad(inode)) return -EIO; @@ -588,6 +597,14 @@ static int fuse_fsync(struct file *file, loff_t start, loff_t end, struct fuse_conn *fc = get_fuse_conn(inode); int err; +#ifdef CONFIG_FUSE_BPF + if (fuse_bpf_backing(inode, struct fuse_fsync_in, err, + fuse_fsync_initialize_in, fuse_fsync_initialize_out, + fuse_fsync_backing, fuse_fsync_finalize, + file, start, end, datasync)) + return err; +#endif + if (fuse_is_bad(inode)) return -EIO; diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index 8780a50be244..db769dd0a2e4 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -1489,6 +1489,14 @@ int fuse_release_backing(struct bpf_fuse_args *fa, int *out, int fuse_release_finalize(struct bpf_fuse_args *fa, int *out, struct inode *inode, struct file *file); +int fuse_flush_initialize_in(struct bpf_fuse_args *fa, struct fuse_flush_in *ffi, + struct file *file, fl_owner_t id); +int fuse_flush_initialize_out(struct bpf_fuse_args *fa, struct fuse_flush_in *ffi, + struct file *file, fl_owner_t id); +int fuse_flush_backing(struct bpf_fuse_args *fa, int *out, struct file *file, fl_owner_t id); +int fuse_flush_finalize(struct bpf_fuse_args *fa, int *out, + struct file *file, fl_owner_t id); + struct fuse_lseek_io { struct fuse_lseek_in fli; struct fuse_lseek_out flo; @@ -1503,6 +1511,19 @@ int fuse_lseek_backing(struct bpf_fuse_args *fa, loff_t *out, struct file *file, int fuse_lseek_finalize(struct bpf_fuse_args *fa, loff_t *out, struct file *file, loff_t offset, int whence); +int fuse_fsync_initialize_in(struct bpf_fuse_args *fa, struct fuse_fsync_in *ffi, + struct file *file, loff_t start, loff_t end, int datasync); +int fuse_fsync_initialize_out(struct bpf_fuse_args *fa, struct fuse_fsync_in *ffi, + struct file *file, loff_t start, loff_t end, int datasync); +int fuse_fsync_backing(struct bpf_fuse_args *fa, int *out, + struct file *file, loff_t start, loff_t end, int datasync); +int fuse_fsync_finalize(struct bpf_fuse_args *fa, int *out, + struct file *file, loff_t start, loff_t end, int datasync); +int fuse_dir_fsync_initialize_in(struct bpf_fuse_args *fa, struct fuse_fsync_in *ffi, + struct file *file, loff_t start, loff_t end, int datasync); +int fuse_dir_fsync_initialize_out(struct bpf_fuse_args *fa, struct fuse_fsync_in *ffi, + struct file *file, loff_t start, loff_t end, int datasync); + struct fuse_read_iter_out { uint64_t ret; };