Signed-off-by: Daniel Rosenberg <drosen@xxxxxxxxxx>
Signed-off-by: Paul Lawrence <paullawrence@xxxxxxxxxx>
---
fs/fuse/backing.c | 68 +++++++++++++++++++++++++++++++++++++++++++++++
fs/fuse/file.c | 10 +++++++
fs/fuse/fuse_i.h | 24 +++++++++++++++++
3 files changed, 102 insertions(+)
diff --git a/fs/fuse/backing.c b/fs/fuse/backing.c
index 13075eddeb7e..8fd5cbfdd4fa 100644
--- a/fs/fuse/backing.c
+++ b/fs/fuse/backing.c
@@ -553,6 +553,74 @@ int fuse_lseek_finalize(struct bpf_fuse_args *fa, loff_t *out,
return 0;
}
+int fuse_copy_file_range_initialize_in(struct bpf_fuse_args *fa,
+ struct fuse_copy_file_range_io *fcf,
+ struct file *file_in, loff_t pos_in, struct file *file_out,
+ loff_t pos_out, size_t len, unsigned int flags)
+{
+ struct fuse_file *fuse_file_in = file_in->private_data;
+ struct fuse_file *fuse_file_out = file_out->private_data;
+
+ fcf->fci = (struct fuse_copy_file_range_in) {
+ .fh_in = fuse_file_in->fh,
+ .off_in = pos_in,
+ .nodeid_out = fuse_file_out->nodeid,
+ .fh_out = fuse_file_out->fh,
+ .off_out = pos_out,
+ .len = len,
+ .flags = flags,
+ };
+
+ *fa = (struct bpf_fuse_args) {
+ .nodeid = get_node_id(file_in->f_inode),
+ .opcode = FUSE_COPY_FILE_RANGE,
+ .in_numargs = 1,
+ .in_args[0].size = sizeof(fcf->fci),
+ .in_args[0].value = &fcf->fci,
+ };
+
+ return 0;
+}
+
+int fuse_copy_file_range_initialize_out(struct bpf_fuse_args *fa,
+ struct fuse_copy_file_range_io *fcf,
+ struct file *file_in, loff_t pos_in, struct file *file_out,
+ loff_t pos_out, size_t len, unsigned int flags)
+{
+ fa->out_numargs = 1;
+ fa->out_args[0].size = sizeof(fcf->fwo);
+ fa->out_args[0].value = &fcf->fwo;
+
+ return 0;
+}
+
+int fuse_copy_file_range_backing(struct bpf_fuse_args *fa, ssize_t *out, struct file *file_in,
+ loff_t pos_in, struct file *file_out, loff_t pos_out, size_t len,
+ unsigned int flags)
+{
+ const struct fuse_copy_file_range_in *fci = fa->in_args[0].value;
+ struct fuse_file *fuse_file_in = file_in->private_data;
+ struct file *backing_file_in = fuse_file_in->backing_file;
+ struct fuse_file *fuse_file_out = file_out->private_data;
+ struct file *backing_file_out = fuse_file_out->backing_file;
+
+ /* TODO: Handle changing of in/out files */
+ if (backing_file_out)
+ *out = vfs_copy_file_range(backing_file_in, fci->off_in, backing_file_out,
+ fci->off_out, fci->len, fci->flags);
+ else
+ *out = generic_copy_file_range(file_in, pos_in, file_out, pos_out, len,
+ flags);
+ return 0;
+}
+
+int fuse_copy_file_range_finalize(struct bpf_fuse_args *fa, ssize_t *out, struct file *file_in,
+ loff_t pos_in, struct file *file_out, loff_t pos_out, size_t len,
+ unsigned int flags)
+{
+ 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)
{
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index fc8f8e3a06b3..85aeb6ade085 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -3180,6 +3180,16 @@ static ssize_t __fuse_copy_file_range(struct file *file_in, loff_t pos_in,
bool is_unstable = (!fc->writeback_cache) &&
((pos_out + len) > inode_out->i_size);
+#ifdef CONFIG_FUSE_BPF
+ if (fuse_bpf_backing(file_in->f_inode, struct fuse_copy_file_range_io, err,
+ fuse_copy_file_range_initialize_in,
+ fuse_copy_file_range_initialize_out,
+ fuse_copy_file_range_backing,
+ fuse_copy_file_range_finalize,
+ file_in, pos_in, file_out, pos_out, len, flags))
+ return err;
+#endif
+
if (fc->no_copy_file_range)
return -EOPNOTSUPP;
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index f8eddcb24137..370fe944387e 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -1541,6 +1541,30 @@ 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);
+struct fuse_copy_file_range_io {
+ struct fuse_copy_file_range_in fci;
+ struct fuse_write_out fwo;
+};
+
+int fuse_copy_file_range_initialize_in(struct bpf_fuse_args *fa,
+ struct fuse_copy_file_range_io *fcf,
+ struct file *file_in, loff_t pos_in,
+ struct file *file_out, loff_t pos_out,
+ size_t len, unsigned int flags);
+int fuse_copy_file_range_initialize_out(struct bpf_fuse_args *fa,
+ struct fuse_copy_file_range_io *fcf,
+ struct file *file_in, loff_t pos_in,
+ struct file *file_out, loff_t pos_out,
+ size_t len, unsigned int flags);
+int fuse_copy_file_range_backing(struct bpf_fuse_args *fa, ssize_t *out,
+ struct file *file_in, loff_t pos_in,
+ struct file *file_out, loff_t pos_out,
+ size_t len, unsigned int flags);
+int fuse_copy_file_range_finalize(struct bpf_fuse_args *fa, ssize_t *out,
+ struct file *file_in, loff_t pos_in,
+ struct file *file_out, loff_t pos_out,
+ size_t len, unsigned int flags);
+
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,
--
2.37.3.998.g577e59143f-goog
