[RFC,v4,33/36] fuse-bpf: Add default filter op

Message ID	20240329015351.624249-34-drosen@google.com (mailing list archive)
State	New
Headers	show Received: from mail-yw1-f201.google.com (mail-yw1-f201.google.com [209.85.128.201]) (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 3EF2013AD29 for <linux-fsdevel@vger.kernel.org>; Fri, 29 Mar 2024 01:55:14 +0000 (UTC) Date: Thu, 28 Mar 2024 18:53:48 -0700 In-Reply-To: <20240329015351.624249-1-drosen@google.com> Precedence: bulk Mime-Version: 1.0 References: <20240329015351.624249-1-drosen@google.com> Message-ID: <20240329015351.624249-34-drosen@google.com> Subject: [RFC PATCH v4 33/36] fuse-bpf: Add default filter op From: Daniel Rosenberg <drosen@google.com> To: Miklos Szeredi <miklos@szeredi.hu>, bpf@vger.kernel.org, Alexei Starovoitov <ast@kernel.org> Cc: Amir Goldstein <amir73il@gmail.com>, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-unionfs@vger.kernel.org, Daniel Borkmann <daniel@iogearbox.net>, John Fastabend <john.fastabend@gmail.com>, Andrii Nakryiko <andrii@kernel.org>, Martin KaFai Lau <martin.lau@linux.dev>, Song Liu <song@kernel.org>, Eduard Zingerman <eddyz87@gmail.com>, Yonghong Song <yonghong.song@linux.dev>, KP Singh <kpsingh@kernel.org>, Stanislav Fomichev <sdf@google.com>, Hao Luo <haoluo@google.com>, Jiri Olsa <jolsa@kernel.org>, Shuah Khan <shuah@kernel.org>, Jonathan Corbet <corbet@lwn.net>, Joanne Koong <joannelkoong@gmail.com>, Mykola Lysenko <mykolal@fb.com>, Christian Brauner <brauner@kernel.org>, kernel-team@android.com, Daniel Rosenberg <drosen@google.com> Content-Type: text/plain; charset="UTF-8"
Series	Fuse-BPF and plans on merging with Fuse Passthrough \| expand [RFC,v4,00/36] Fuse-BPF and plans on merging with Fuse Passthrough [RFC,v4,01/36] fuse-bpf: Update fuse side uapi [RFC,v4,02/36] fuse-bpf: Add data structures for fuse-bpf [RFC,v4,03/36] fuse-bpf: Prepare for fuse-bpf patch [RFC,v4,04/36] fuse: Add fuse-bpf, a stacked fs extension for FUSE [RFC,v4,05/36] fuse-bpf: Add ioctl interface for /dev/fuse [RFC,v4,06/36] fuse-bpf: Don't support export_operations [RFC,v4,07/36] fuse-bpf: Add support for access [RFC,v4,08/36] fuse-bpf: Partially add mapping support [RFC,v4,09/36] fuse-bpf: Add lseek support [RFC,v4,10/36] fuse-bpf: Add support for fallocate [RFC,v4,11/36] fuse-bpf: Support file/dir open/close [RFC,v4,12/36] fuse-bpf: Support mknod/unlink/mkdir/rmdir [RFC,v4,13/36] fuse-bpf: Add support for read/write iter [RFC,v4,14/36] fuse-bpf: support readdir [RFC,v4,15/36] fuse-bpf: Add support for sync operations [RFC,v4,16/36] fuse-bpf: Add Rename support [RFC,v4,17/36] fuse-bpf: Add attr support [RFC,v4,18/36] fuse-bpf: Add support for FUSE_COPY_FILE_RANGE [RFC,v4,19/36] fuse-bpf: Add xattr support [RFC,v4,20/36] fuse-bpf: Add symlink/link support [RFC,v4,21/36] fuse-bpf: Add partial flock support [RFC,v4,22/36] fuse-bpf: Add partial ioctl support [RFC,v4,23/36] fuse-bpf: allow mounting with no userspace daemon [RFC,v4,24/36] fuse-bpf: Add fuse-bpf constants [RFC,v4,25/36] bpf: Increase struct_op max members [RFC,v4,26/36] WIP: bpf: Add fuse_ops struct_op programs [RFC,v4,27/36] fuse-bpf: Export Functions [RFC,v4,28/36] fuse: Provide registration functions for fuse-bpf [RFC,v4,29/36] fuse-bpf: Set fuse_ops at mount or lookup time [RFC,v4,30/36] fuse-bpf: Call bpf for pre/post filters [RFC,v4,31/36] fuse-bpf: Add userspace pre/post filters [RFC,v4,32/36] WIP: fuse-bpf: add error_out [RFC,v4,33/36] fuse-bpf: Add default filter op [RFC,v4,34/36] tools: Add FUSE, update bpf includes [RFC,v4,35/36] fuse-bpf: Add selftests [RFC,v4,36/36] fuse: Provide easy way to test fuse struct_op call

diff --git a/fs/fuse/backing.c b/fs/fuse/backing.c index 9227e62b8734..ec554a2bc93f 100644 --- a/fs/fuse/backing.c +++ b/fs/fuse/backing.c @@ -244,6 +244,12 @@ static inline void bpf_fuse_free_alloced(struct bpf_fuse_args *fa) &fa.info, &feo); \ else \ bpf_next = BPF_FUSE_CONTINUE; \ + if (bpf_next == BPF_FUSE_CALL_DEFAULT) { \ + if (fuse_ops->default_filter) \ + bpf_next = fuse_ops->default_filter(&fa.info); \ + else \ + bpf_next = BPF_FUSE_CONTINUE; \ + } \ if (bpf_next < 0) { \ error = bpf_next; \ break; \ @@ -283,6 +289,12 @@ static inline void bpf_fuse_free_alloced(struct bpf_fuse_args *fa) fa.info.opcode |= FUSE_POSTFILTER; \ if (bpf_next == BPF_FUSE_POSTFILTER) \ bpf_next = call_postfilter(fuse_ops, &fa.info, &feo);\ + if (bpf_next == BPF_FUSE_CALL_DEFAULT) { \ + if (fuse_ops->default_filter) \ + bpf_next = fuse_ops->default_filter(&fa.info); \ + else \ + bpf_next = BPF_FUSE_CONTINUE; \ + } \ if (bpf_next < 0) { \ error = bpf_next; \ break; \ @@ -611,7 +623,7 @@ static int fuse_open_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_info * if (ops->opendir_prefilter) return ops->opendir_prefilter(meta, &open->in); } - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_open_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -625,7 +637,7 @@ static int fuse_open_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info if (ops->opendir_postfilter) return ops->opendir_postfilter(meta, &open->in, &open->out); } - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_open_backing(struct bpf_fuse_args *fa, int *out, @@ -767,7 +779,7 @@ static int fuse_create_open_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta { if (ops->create_open_prefilter) return ops->create_open_prefilter(meta, &args->in, &args->name); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_create_open_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -775,7 +787,7 @@ static int fuse_create_open_postfilter(struct fuse_ops *ops, struct bpf_fuse_met { if (ops->create_open_postfilter) return ops->create_open_postfilter(meta, &args->in, &args->name, &args->entry_out, &args->open_out); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_open_file_backing(struct inode *inode, struct file *file) @@ -931,7 +943,7 @@ static int fuse_release_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_inf { if (ops->release_prefilter) return ops->release_prefilter(meta, args); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_release_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -939,7 +951,7 @@ static int fuse_release_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_in { if (ops->release_postfilter) return ops->release_postfilter(meta, args); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_releasedir_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -947,7 +959,7 @@ static int fuse_releasedir_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_ { if (ops->releasedir_prefilter) return ops->releasedir_prefilter(meta, args); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_releasedir_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -955,7 +967,7 @@ static int fuse_releasedir_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta { if (ops->releasedir_postfilter) return ops->releasedir_postfilter(meta, args); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_release_backing(struct bpf_fuse_args *fa, int *out, @@ -1022,7 +1034,7 @@ static int fuse_flush_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_info { if (ops->flush_prefilter) return ops->flush_prefilter(meta, args); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_flush_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -1030,7 +1042,7 @@ static int fuse_flush_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info { if (ops->flush_postfilter) return ops->flush_postfilter(meta, args); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_flush_backing(struct bpf_fuse_args *fa, int *out, struct file *file, fl_owner_t id) @@ -1102,7 +1114,7 @@ static int fuse_lseek_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_info { if (ops->lseek_prefilter) return ops->lseek_prefilter(meta, &args->in); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_lseek_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -1110,7 +1122,7 @@ static int fuse_lseek_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info { if (ops->lseek_postfilter) return ops->lseek_postfilter(meta, &args->in, &args->out); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_lseek_backing(struct bpf_fuse_args *fa, loff_t *out, @@ -1217,7 +1229,7 @@ static int fuse_copy_file_range_prefilter(struct fuse_ops *ops, struct bpf_fuse_ { if (ops->copy_file_range_prefilter) return ops->copy_file_range_prefilter(meta, &args->in); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_copy_file_range_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -1225,7 +1237,7 @@ static int fuse_copy_file_range_postfilter(struct fuse_ops *ops, struct bpf_fuse { if (ops->copy_file_range_postfilter) return ops->copy_file_range_postfilter(meta, &args->in, &args->out); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_copy_file_range_backing(struct bpf_fuse_args *fa, ssize_t *out, struct file *file_in, @@ -1303,7 +1315,7 @@ static int fuse_fsync_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_info { if (ops->fsync_prefilter) return ops->fsync_prefilter(meta, in); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_fsync_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -1311,7 +1323,7 @@ static int fuse_fsync_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info { if (ops->fsync_postfilter) return ops->fsync_postfilter(meta, in); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_fsync_backing(struct bpf_fuse_args *fa, int *out, @@ -1376,7 +1388,7 @@ static int fuse_dir_fsync_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_i { if (ops->dir_fsync_prefilter) return ops->fsync_prefilter(meta, in); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_dir_fsync_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -1384,7 +1396,7 @@ static int fuse_dir_fsync_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_ { if (ops->dir_fsync_postfilter) return ops->dir_fsync_postfilter(meta, in); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } int fuse_bpf_dir_fsync(int *out, struct inode *inode, struct file *file, loff_t start, loff_t end, int datasync) @@ -1466,7 +1478,7 @@ static int fuse_getxattr_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_in { if (ops->getxattr_prefilter) return ops->getxattr_prefilter(meta, &args->in, &args->name); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_getxattr_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -1474,7 +1486,7 @@ static int fuse_getxattr_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_i { if (ops->getxattr_postfilter) return ops->getxattr_postfilter(meta, &args->in, &args->name, &args->value, &args->out); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_getxattr_backing(struct bpf_fuse_args *fa, int *out, @@ -1580,7 +1592,7 @@ static int fuse_listxattr_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_i { if (ops->listxattr_prefilter) return ops->listxattr_prefilter(meta, &args->in); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_listxattr_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -1588,7 +1600,7 @@ static int fuse_listxattr_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_ { if (ops->listxattr_postfilter) return ops->listxattr_postfilter(meta, &args->in, &args->value, &args->out); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_listxattr_backing(struct bpf_fuse_args *fa, ssize_t *out, struct dentry *dentry, @@ -1701,7 +1713,7 @@ static int fuse_setxattr_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_in { if (ops->setxattr_prefilter) return ops->setxattr_prefilter(meta, &args->in, &args->name, &args->value); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_setxattr_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -1709,7 +1721,7 @@ static int fuse_setxattr_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_i { if (ops->setxattr_postfilter) return ops->setxattr_postfilter(meta, &args->in, &args->name, &args->value); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_setxattr_backing(struct bpf_fuse_args *fa, int *out, struct dentry *dentry, @@ -1777,7 +1789,7 @@ static int fuse_removexattr_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta { if (ops->removexattr_prefilter) return ops->removexattr_prefilter(meta, in); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_removexattr_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -1785,7 +1797,7 @@ static int fuse_removexattr_postfilter(struct fuse_ops *ops, struct bpf_fuse_met { if (ops->removexattr_postfilter) return ops->removexattr_postfilter(meta, in); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_removexattr_backing(struct bpf_fuse_args *fa, int *out, @@ -1904,7 +1916,7 @@ static int fuse_file_read_iter_prefilter(struct fuse_ops *ops, struct bpf_fuse_m { if (ops->read_iter_prefilter) return ops->read_iter_prefilter(meta, &args->in); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_file_read_iter_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -1912,7 +1924,7 @@ static int fuse_file_read_iter_postfilter(struct fuse_ops *ops, struct bpf_fuse_ { if (ops->read_iter_postfilter) return ops->read_iter_postfilter(meta, &args->in, &args->out); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } // TODO: use backing-file.c @@ -2044,7 +2056,7 @@ static int fuse_write_iter_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_ { if (ops->write_iter_prefilter) return ops->write_iter_prefilter(meta, &args->in); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_write_iter_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -2052,7 +2064,7 @@ static int fuse_write_iter_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta { if (ops->write_iter_postfilter) return ops->write_iter_postfilter(meta, &args->in, &args->out); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_file_write_iter_backing(struct bpf_fuse_args *fa, ssize_t *out, @@ -2232,7 +2244,7 @@ static int fuse_file_fallocate_prefilter(struct fuse_ops *ops, struct bpf_fuse_m { if (ops->file_fallocate_prefilter) return ops->file_fallocate_prefilter(meta, in); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_file_fallocate_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -2240,7 +2252,7 @@ static int fuse_file_fallocate_postfilter(struct fuse_ops *ops, struct bpf_fuse_ { if (ops->file_fallocate_postfilter) return ops->file_fallocate_postfilter(meta, in); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_file_fallocate_backing(struct bpf_fuse_args *fa, int *out, @@ -2339,7 +2351,7 @@ static int fuse_lookup_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_info { if (ops->lookup_prefilter) return ops->lookup_prefilter(meta, &args->name); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_lookup_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -2347,7 +2359,7 @@ static int fuse_lookup_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_inf { if (ops->lookup_postfilter) return ops->lookup_postfilter(meta, &args->name, &args->out, &args->bpf_entries); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_lookup_backing(struct bpf_fuse_args *fa, struct dentry **out, struct inode *dir, @@ -2603,7 +2615,7 @@ static int fuse_mknod_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_info { if (ops->mknod_prefilter) return ops->mknod_prefilter(meta, &args->in, &args->name); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_mknod_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -2611,7 +2623,7 @@ static int fuse_mknod_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info { if (ops->mknod_postfilter) return ops->mknod_postfilter(meta, &args->in, &args->name); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_mknod_backing(struct bpf_fuse_args *fa, int *out, @@ -2773,7 +2785,7 @@ static int fuse_mkdir_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_info { if (ops->mkdir_prefilter) return ops->mkdir_prefilter(meta, &args->in, &args->name); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_mkdir_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -2781,7 +2793,7 @@ static int fuse_mkdir_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info { if (ops->mkdir_prefilter) return ops->mkdir_postfilter(meta, &args->in, &args->name); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } int fuse_bpf_mkdir(int *out, struct inode *dir, struct dentry *entry, umode_t mode) @@ -2827,7 +2839,7 @@ static int fuse_rmdir_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_info { if (ops->rmdir_prefilter) return ops->rmdir_prefilter(meta, name); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_rmdir_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -2835,7 +2847,7 @@ static int fuse_rmdir_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info { if (ops->rmdir_postfilter) return ops->rmdir_postfilter(meta, name); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_rmdir_backing(struct bpf_fuse_args *fa, int *out, @@ -3020,7 +3032,7 @@ static int fuse_rename2_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_inf { if (ops->rename2_prefilter) return ops->rename2_prefilter(meta, &args->in, &args->old_name, &args->new_name); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_rename2_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -3028,7 +3040,7 @@ static int fuse_rename2_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_in { if (ops->rename2_postfilter) return ops->rename2_postfilter(meta, &args->in, &args->old_name, &args->new_name); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_rename2_backing(struct bpf_fuse_args *fa, int *out, @@ -3124,7 +3136,7 @@ static int fuse_rename_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_info { if (ops->rename_prefilter) return ops->rename_prefilter(meta, &args->in, &args->old_name, &args->new_name); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_rename_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -3132,7 +3144,7 @@ static int fuse_rename_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_inf { if (ops->rename_postfilter) return ops->rename_postfilter(meta, &args->in, &args->old_name, &args->new_name); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_rename_backing(struct bpf_fuse_args *fa, int *out, @@ -3195,7 +3207,7 @@ static int fuse_unlink_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_info { if (ops->unlink_prefilter) return ops->unlink_prefilter(meta, name); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_unlink_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -3203,7 +3215,7 @@ static int fuse_unlink_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_inf { if (ops->unlink_postfilter) return ops->unlink_postfilter(meta, name); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_unlink_backing(struct bpf_fuse_args *fa, int *out, struct inode *dir, struct dentry *entry) @@ -3300,7 +3312,7 @@ static int fuse_link_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_info * { if (ops->link_prefilter) return ops->link_prefilter(meta, &args->in, &args->name); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_link_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -3308,7 +3320,7 @@ static int fuse_link_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info { if (ops->link_postfilter) return ops->link_postfilter(meta, &args->in, &args->name); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } @@ -3433,7 +3445,7 @@ static int fuse_getattr_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_inf { if (ops->getattr_prefilter) return ops->getattr_prefilter(meta, &args->in); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_getattr_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -3441,7 +3453,7 @@ static int fuse_getattr_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_in { if (ops->getattr_postfilter) return ops->getattr_postfilter(meta, &args->in, &args->out); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } /* TODO: unify with overlayfs */ @@ -3597,7 +3609,7 @@ static int fuse_setattr_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_inf { if (ops->setattr_prefilter) return ops->setattr_prefilter(meta, &args->in); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_setattr_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -3605,7 +3617,7 @@ static int fuse_setattr_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_in { if (ops->setattr_postfilter) return ops->setattr_postfilter(meta, &args->in, &args->out); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_setattr_backing(struct bpf_fuse_args *fa, int *out, @@ -3680,7 +3692,7 @@ static int fuse_statfs_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_info { if (ops->statfs_prefilter) return ops->statfs_prefilter(meta); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_statfs_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -3688,7 +3700,7 @@ static int fuse_statfs_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_inf { if (ops->statfs_postfilter) return ops->statfs_postfilter(meta, out); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_statfs_backing(struct bpf_fuse_args *fa, int *out, @@ -3801,7 +3813,7 @@ static int fuse_get_link_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_in { if (ops->get_link_prefilter) return ops->get_link_prefilter(meta, &args->name); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_get_link_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -3809,7 +3821,7 @@ static int fuse_get_link_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_i { if (ops->get_link_postfilter) return ops->get_link_postfilter(meta, &args->name); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_get_link_backing(struct bpf_fuse_args *fa, const char **out, @@ -3907,7 +3919,7 @@ static int fuse_symlink_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_inf { if (ops->symlink_prefilter) return ops->symlink_prefilter(meta, &args->name, &args->path); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_symlink_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -3915,7 +3927,7 @@ static int fuse_symlink_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_in { if (ops->symlink_postfilter) return ops->symlink_postfilter(meta, &args->name, &args->path); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_symlink_backing(struct bpf_fuse_args *fa, int *out, @@ -4047,7 +4059,7 @@ static int fuse_readdir_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_inf { if (ops->readdir_prefilter) return ops->readdir_prefilter(meta, &args->in); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_readdir_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -4055,7 +4067,7 @@ static int fuse_readdir_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_in { if (ops->readdir_postfilter) return ops->readdir_postfilter(meta, &args->in, &args->out, &args->buffer); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } struct fusebpf_ctx { @@ -4223,7 +4235,7 @@ static int fuse_access_prefilter(struct fuse_ops *ops, struct bpf_fuse_meta_info { if (ops->access_prefilter) return ops->access_prefilter(meta, in); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_access_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_info *meta, @@ -4231,7 +4243,7 @@ static int fuse_access_postfilter(struct fuse_ops *ops, struct bpf_fuse_meta_inf { if (ops->access_postfilter) return ops->access_postfilter(meta, in); - return BPF_FUSE_CONTINUE; + return BPF_FUSE_CALL_DEFAULT; } static int fuse_access_backing(struct bpf_fuse_args *fa, int *out, struct inode *inode, int mask) diff --git a/include/linux/bpf_fuse.h b/include/linux/bpf_fuse.h index 15646ba59c41..0747790c47ec 100644 --- a/include/linux/bpf_fuse.h +++ b/include/linux/bpf_fuse.h @@ -86,6 +86,8 @@ static inline unsigned bpf_fuse_arg_size(const struct bpf_fuse_arg *arg) } struct fuse_ops { + uint32_t (*default_filter)(const struct bpf_fuse_meta_info *meta); + uint32_t (*open_prefilter)(const struct bpf_fuse_meta_info *meta, struct fuse_open_in *in); uint32_t (*open_postfilter)(const struct bpf_fuse_meta_info *meta, diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index 46c1a3e3166d..fe8b485c9335 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -7467,6 +7467,7 @@ struct bpf_iter_num { #define BPF_FUSE_USER_PREFILTER 2 #define BPF_FUSE_POSTFILTER 3 #define BPF_FUSE_USER_POSTFILTER 4 +#define BPF_FUSE_CALL_DEFAULT 5 /* Op Code Filter values for BPF Programs */ #define FUSE_OPCODE_FILTER 0x0ffff

[RFC,v4,33/36] fuse-bpf: Add default filter op

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Patch