Signed-off-by: Daniel Rosenberg <drosen@xxxxxxxxxx>
Signed-off-by: Paul Lawrence <paullawrence@xxxxxxxxxx>
---
fs/fuse/backing.c | 48 +++++++++++++++++++++++++++++++++++++++++++++++
fs/fuse/file.c | 10 ++++++++++
fs/fuse/fuse_i.h | 11 +++++++++++
3 files changed, 69 insertions(+)
diff --git a/fs/fuse/backing.c b/fs/fuse/backing.c
index 97e92c633cfd..95c60d6d7597 100644
--- a/fs/fuse/backing.c
+++ b/fs/fuse/backing.c
@@ -188,6 +188,54 @@ ssize_t fuse_backing_mmap(struct file *file, struct vm_area_struct *vma)
return ret;
}
+int fuse_file_fallocate_initialize_in(struct bpf_fuse_args *fa,
+ struct fuse_fallocate_in *ffi,
+ struct file *file, int mode, loff_t offset, loff_t length)
+{
+ struct fuse_file *ff = file->private_data;
+
+ *ffi = (struct fuse_fallocate_in) {
+ .fh = ff->fh,
+ .offset = offset,
+ .length = length,
+ .mode = mode,
+ };
+
+ *fa = (struct bpf_fuse_args) {
+ .opcode = FUSE_FALLOCATE,
+ .nodeid = ff->nodeid,
+ .in_numargs = 1,
+ .in_args[0].size = sizeof(*ffi),
+ .in_args[0].value = ffi,
+ };
+
+ return 0;
+}
+
+int fuse_file_fallocate_initialize_out(struct bpf_fuse_args *fa,
+ struct fuse_fallocate_in *ffi,
+ struct file *file, int mode, loff_t offset, loff_t length)
+{
+ return 0;
+}
+
+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;
+}
+
+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;
+}
+
/*******************************************************************************
* Directory operations after here *
******************************************************************************/
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index dd4485261cc7..ef6f6b0b3b59 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -3002,6 +3002,16 @@ static long fuse_file_fallocate(struct file *file, int mode, loff_t offset,
bool block_faults = FUSE_IS_DAX(inode) && lock_inode;
+#ifdef CONFIG_FUSE_BPF
+ if (fuse_bpf_backing(inode, struct fuse_fallocate_in, err,
+ fuse_file_fallocate_initialize_in,
+ fuse_file_fallocate_initialize_out,
+ fuse_file_fallocate_backing,
+ fuse_file_fallocate_finalize,
+ file, mode, offset, length))
+ return err;
+#endif
+
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 fc3e8adf0422..0e4996766c6c 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -1422,6 +1422,17 @@ int fuse_lseek_finalize(struct bpf_fuse_args *fa, loff_t *out, struct file *file
ssize_t fuse_backing_mmap(struct file *file, struct vm_area_struct *vma);
+int fuse_file_fallocate_initialize_in(struct bpf_fuse_args *fa,
+ struct fuse_fallocate_in *ffi,
+ struct file *file, int mode, loff_t offset, loff_t length);
+int fuse_file_fallocate_initialize_out(struct bpf_fuse_args *fa,
+ struct fuse_fallocate_in *ffi,
+ struct file *file, int mode, loff_t offset, loff_t length);
+int fuse_file_fallocate_backing(struct bpf_fuse_args *fa, int *out,
+ struct file *file, int mode, loff_t offset, loff_t length);
+int fuse_file_fallocate_finalize(struct bpf_fuse_args *fa, int *out,
+ struct file *file, int mode, loff_t offset, loff_t length);
+
struct fuse_lookup_io {
struct fuse_entry_out feo;
struct fuse_entry_bpf feb;
--
2.37.3.998.g577e59143f-goog
