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Message-ID: <20230418014037.2412394-15-drosen@google.com>
Date: Mon, 17 Apr 2023 18:40:14 -0700
From: Daniel Rosenberg <drosen@...gle.com>
To: Miklos Szeredi <miklos@...redi.hu>, bpf@...r.kernel.org,
Alexei Starovoitov <ast@...nel.org>
Cc: Amir Goldstein <amir73il@...il.com>, linux-kernel@...r.kernel.org,
linux-fsdevel@...r.kernel.org, linux-unionfs@...r.kernel.org,
Daniel Borkmann <daniel@...earbox.net>,
John Fastabend <john.fastabend@...il.com>,
Andrii Nakryiko <andrii@...nel.org>,
Martin KaFai Lau <martin.lau@...ux.dev>,
Song Liu <song@...nel.org>, Yonghong Song <yhs@...com>,
KP Singh <kpsingh@...nel.org>,
Stanislav Fomichev <sdf@...gle.com>,
Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
Shuah Khan <shuah@...nel.org>,
Jonathan Corbet <corbet@....net>,
Joanne Koong <joannelkoong@...il.com>,
Mykola Lysenko <mykolal@...com>, kernel-team@...roid.com,
Daniel Rosenberg <drosen@...gle.com>,
Paul Lawrence <paullawrence@...gle.com>
Subject: [RFC PATCH v3 14/37] fuse-bpf: Add support for fallocate
This adds backing support for FUSE_FALLOCATE
Signed-off-by: Daniel Rosenberg <drosen@...gle.com>
Signed-off-by: Paul Lawrence <paullawrence@...gle.com>
---
fs/fuse/backing.c | 60 +++++++++++++++++++++++++++++++++++++++++++++++
fs/fuse/file.c | 3 +++
fs/fuse/fuse_i.h | 6 +++++
3 files changed, 69 insertions(+)
diff --git a/fs/fuse/backing.c b/fs/fuse/backing.c
index c4916dde48c8..ee315598bc3f 100644
--- a/fs/fuse/backing.c
+++ b/fs/fuse/backing.c
@@ -333,6 +333,66 @@ ssize_t fuse_backing_mmap(struct file *file, struct vm_area_struct *vma)
return ret;
}
+static int fuse_file_fallocate_initialize_in(struct bpf_fuse_args *fa,
+ struct fuse_fallocate_in *in,
+ struct file *file, int mode, loff_t offset, loff_t length)
+{
+ struct fuse_file *ff = file->private_data;
+
+ *in = (struct fuse_fallocate_in) {
+ .fh = ff->fh,
+ .offset = offset,
+ .length = length,
+ .mode = mode,
+ };
+
+ *fa = (struct bpf_fuse_args) {
+ .info = (struct bpf_fuse_meta_info) {
+ .opcode = FUSE_FALLOCATE,
+ .nodeid = ff->nodeid,
+ },
+ .in_numargs = 1,
+ .in_args[0].size = sizeof(*in),
+ .in_args[0].value = in,
+ };
+
+ return 0;
+}
+
+static int fuse_file_fallocate_initialize_out(struct bpf_fuse_args *fa,
+ struct fuse_fallocate_in *in,
+ struct file *file, int mode, loff_t offset, loff_t length)
+{
+ return 0;
+}
+
+static int fuse_file_fallocate_backing(struct bpf_fuse_args *fa, int *out,
+ struct file *file, int mode, loff_t offset, loff_t length)
+{
+ const struct fuse_fallocate_in *ffi = fa->in_args[0].value;
+ struct fuse_file *ff = file->private_data;
+
+ *out = vfs_fallocate(ff->backing_file, ffi->mode, ffi->offset,
+ ffi->length);
+ return 0;
+}
+
+static int fuse_file_fallocate_finalize(struct bpf_fuse_args *fa, int *out,
+ struct file *file, int mode, loff_t offset, loff_t length)
+{
+ return 0;
+}
+
+int fuse_bpf_file_fallocate(int *out, struct inode *inode, struct file *file, int mode, loff_t offset, loff_t length)
+{
+ return bpf_fuse_backing(inode, struct fuse_fallocate_in, out,
+ fuse_file_fallocate_initialize_in,
+ fuse_file_fallocate_initialize_out,
+ fuse_file_fallocate_backing,
+ fuse_file_fallocate_finalize,
+ file, mode, offset, length);
+}
+
/*******************************************************************************
* Directory operations after here *
******************************************************************************/
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 9758bd1665a6..58cff04660db 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -3071,6 +3071,9 @@ static long fuse_file_fallocate(struct file *file, int mode, loff_t offset,
(!(mode & FALLOC_FL_KEEP_SIZE) ||
(mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_ZERO_RANGE)));
+ if (fuse_bpf_file_fallocate(&err, inode, file, mode, offset, length))
+ return err;
+
if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
FALLOC_FL_ZERO_RANGE))
return -EOPNOTSUPP;
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 624d0cebd287..1dd9cc9720df 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -1406,6 +1406,7 @@ int parse_fuse_bpf_entry(struct fuse_bpf_entry *fbe, int num_entries);
#ifdef CONFIG_FUSE_BPF
int fuse_bpf_lseek(loff_t *out, struct inode *inode, struct file *file, loff_t offset, int whence);
+int fuse_bpf_file_fallocate(int *out, struct inode *inode, struct file *file, int mode, loff_t offset, loff_t length);
int fuse_bpf_lookup(struct dentry **out, struct inode *dir, struct dentry *entry, unsigned int flags);
int fuse_bpf_access(int *out, struct inode *inode, int mask);
@@ -1416,6 +1417,11 @@ static inline int fuse_bpf_lseek(loff_t *out, struct inode *inode, struct file *
return 0;
}
+static inline int fuse_bpf_file_fallocate(int *out, struct inode *inode, struct file *file, int mode, loff_t offset, loff_t length)
+{
+ return 0;
+}
+
static inline int fuse_bpf_lookup(struct dentry **out, struct inode *dir, struct dentry *entry, unsigned int flags)
{
return 0;
--
2.40.0.634.g4ca3ef3211-goog
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