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BACKPORT: ANDROID: fuse-bpf v1

Browse source 
Bug: 202785178
Test: test_fuse passes on linux, feature works on cuttlefish
Signed-off-by: Paul Lawrence <paullawrence@google.com>
Signed-off-by: Daniel Rosenberg <drosen@google.com>
Change-Id: I987684b799b07391ccde350e98fde7976f5601aa
This commit is contained in:
Daniel Rosenberg 2021-12-02 14:38:56 -08:00 • committed by Alexander Martinz
commit b3fbcd3ca5
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GPG key ID: CF15BDD9A321A9B2
16 changed files with 3213 additions and 70 deletions
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1
include/uapi/linux/bpf.h
View file

@ -199,6 +199,7 @@ enum bpf_prog_type {
BPF_PROG_TYPE_EXT,
BPF_PROG_TYPE_LSM,
BPF_PROG_TYPE_SK_LOOKUP,
BPF_PROG_TYPE_FUSE,
};
enum bpf_attach_type {

25
include/uapi/linux/fuse.h
View file

@ -516,6 +516,17 @@ struct fuse_entry_out {
struct fuse_attr attr;
};
#define FUSE_ACTION_KEEP 0
#define FUSE_ACTION_REMOVE 1
#define FUSE_ACTION_REPLACE 2
struct fuse_entry_bpf_out {
uint64_t backing_action;
uint64_t backing_fd;
uint64_t bpf_action;
uint64_t bpf_fd;
};
struct fuse_forget_in {
uint64_t nlookup;
};
@ -813,7 +824,7 @@ struct fuse_in_header {
uint32_t uid;
uint32_t gid;
uint32_t pid;
uint32_t padding;
uint32_t error_in;
};
struct fuse_out_header {
@ -978,12 +989,20 @@ struct fuse_args {
bool page_zeroing:1;
bool page_replace:1;
bool may_block:1;
struct fuse_in_arg in_args[3];
struct fuse_arg out_args[2];
struct fuse_in_arg in_args[5];
struct fuse_arg out_args[3];
void (*end)(struct fuse_mount *fm, struct fuse_args *args, int error);
/* Path used for completing d_canonical_path */
struct path *canonical_path;
};
#define FUSE_BPF_USER_FILTER 1
#define FUSE_BPF_BACKING 2
#define FUSE_BPF_POST_FILTER 4
#define FUSE_OPCODE_FILTER 0x0ffff
#define FUSE_PREFILTER 0x10000
#define FUSE_POSTFILTER 0x20000
#endif /* _LINUX_FUSE_H */