1+ #include "riscv.h"
2+ #include "virtio.h"
3+
4+ #define FUSE_REC_ALIGN (x ) \
5+ (((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1))
6+ #define FUSE_DIRENT_ALIGN (x ) FUSE_REC_ALIGN(x)
7+
8+ struct fuse_in_header {
9+ uint32_t len ;
10+ uint32_t opcode ;
11+ uint64_t unique ;
12+ uint64_t nodeid ;
13+ uint32_t uid ;
14+ uint32_t gid ;
15+ uint32_t pid ;
16+ uint32_t padding ;
17+ };
18+
19+ struct fuse_out_header {
20+ uint32_t len ;
21+ int32_t error ;
22+ uint64_t unique ;
23+ };
24+
25+ struct vfs_req_header {
26+ struct fuse_in_header in ;
27+ };
28+
29+ struct vfs_resp_header {
30+ struct fuse_out_header out ;
31+ };
32+
33+ struct fuse_init_in {
34+ /* FUSE major version supported by the guest (typically 7) */
35+ uint32_t major ;
36+ /* FUSE minor version supported by the guest (e.g., 31, 26) */
37+ uint32_t minor ;
38+ uint32_t max_readahead ; /* Maximum readahead size supported by the guest */
39+ uint32_t flags ; /* Flags requested by the guest */
40+ };
41+
42+ struct fuse_init_out {
43+ uint32_t major ; /* FUSE major version supported by the device */
44+ uint32_t minor ; /* FUSE minor version supported by the device */
45+ uint32_t max_readahead ; /* Maximum readahead size accepted by the device */
46+ /* Flags supported by the device (negotiated with the guest) */
47+ uint32_t flags ;
48+ uint16_t max_background ; /* Maximum number of background requests */
49+ uint16_t congestion_threshold ;
50+ uint32_t max_write ; /* Maximum write size the device can handle */
51+ uint32_t time_gran ; /* Time granularity (in nanoseconds) */
52+ uint32_t unused [11 ]; /* Reserved */
53+ };
54+
55+ struct fuse_getattr_in {
56+ /* bitmask for valid fields (e.g. FUSE_GETATTR_FH) */
57+ uint32_t getattr_flags ;
58+ uint32_t padding ; /* unused, reserved for alignment */
59+ uint64_t fh ; /* optional: file handle (used when getattr_flags has */
60+ };
61+
62+ struct fuse_attr {
63+ uint64_t ino ; /* inode number */
64+ uint64_t size ; /* file size in bytes */
65+ uint64_t blocks ; /* number of 512B blocks allocated */
66+ uint64_t atime ; /* last access time (UNIX time) */
67+ uint64_t mtime ; /* last modification time */
68+ uint64_t ctime ; /* last status change time */
69+ uint32_t atimensec ; /* nanoseconds part */
70+ uint32_t mtimensec ;
71+ uint32_t ctimensec ;
72+ uint32_t mode ; /* file mode (e.g. S_IFDIR | 0755) */
73+ uint32_t nlink ; /* number of hard links */
74+ uint32_t uid ; /* owner uid */
75+ uint32_t gid ; /* owner gid */
76+ uint32_t rdev ; /* device ID (if special file) */
77+ uint32_t blksize ; /* block size */
78+ uint32_t flags ; /* reserved */
79+ };
80+
81+ struct fuse_attr_out {
82+ uint64_t attr_valid ; /* seconds the attributes are valid */
83+ uint32_t attr_valid_nsec ; /* nanoseconds part of attr_valid */
84+ uint32_t dummy ; /* padding for alignment */
85+ struct fuse_attr attr ; /* actual attributes */
86+ };
87+
88+ struct fuse_open_in {
89+ uint32_t flags ;
90+ uint32_t open_flags ;
91+ };
92+
93+ struct fuse_open_out {
94+ uint64_t fh ;
95+ uint32_t open_flags ;
96+ int32_t backing_id ;
97+ };
98+
99+ struct fuse_read_in {
100+ uint64_t fh ;
101+ uint64_t offset ;
102+ uint32_t size ;
103+ uint32_t read_flags ;
104+ uint64_t lock_owner ;
105+ uint32_t flags ;
106+ uint32_t padding ;
107+ };
108+
109+ struct fuse_entry_out {
110+ uint64_t nodeid ; /* inode number */
111+ uint64_t generation ; /* inode generation */
112+ uint64_t entry_valid ; /* cache timeout (sec) */
113+ uint64_t attr_valid ; /* attr cache timeout (sec) */
114+ uint32_t entry_valid_nsec ; /* cache timeout (nsec) */
115+ uint32_t attr_valid_nsec ; /* attr cache timeout (nsec) */
116+ struct fuse_attr attr ; /* file attributes */
117+ };
118+
119+ struct fuse_dirent {
120+ uint64_t ino ; /* inode number */
121+ uint64_t off ; /* offset to next entry */
122+ uint32_t namelen ; /* length of the entry name */
123+ uint32_t type ; /* file type (DT_REG, DT_DIR, etc.) */
124+ char name []; /* name (not null-terminated) */
125+ };
126+
127+ struct fuse_direntplus {
128+ struct fuse_entry_out entry_out ;
129+ struct fuse_dirent dirent ;
130+ };
131+
132+ struct fuse_lookup_in {
133+ uint64_t parent ; /* inode of parent dir */
134+ };
135+
136+ struct fuse_forget_in {
137+ uint64_t nlookup ;
138+ };
139+
140+ struct fuse_create_in {
141+ uint32_t flags ;
142+ uint32_t mode ;
143+ uint32_t umask ;
144+ uint32_t open_flags ;
145+ };
146+
147+ struct fuse_release_in {
148+ uint64_t fh ;
149+ uint32_t flags ;
150+ uint32_t release_flags ;
151+ uint64_t lock_owner ;
152+ };
153+
154+ struct fuse_flush_in {
155+ uint64_t fh ;
156+ uint32_t unused ;
157+ uint32_t padding ;
158+ uint64_t lock_owner ;
159+ };
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