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9f107513 AL |
1 | #ifndef _QEMU_VIRTIO_9P_H |
2 | #define _QEMU_VIRTIO_9P_H | |
3 | ||
4 | #include <sys/types.h> | |
5 | #include <dirent.h> | |
6 | #include <sys/time.h> | |
7 | #include <utime.h> | |
7a462745 | 8 | #include <sys/resource.h> |
ff06030f | 9 | #include "hw/virtio.h" |
353ac78d | 10 | #include "fsdev/file-op-9p.h" |
02cb7f3a AK |
11 | #include "qemu-thread.h" |
12 | #include "qemu-coroutine.h" | |
9f107513 AL |
13 | |
14 | /* The feature bitmap for virtio 9P */ | |
15 | /* The mount point is specified in a config variable */ | |
16 | #define VIRTIO_9P_MOUNT_TAG 0 | |
17 | ||
18 | enum { | |
8f4d1ca5 AB |
19 | P9_TLERROR = 6, |
20 | P9_RLERROR, | |
be940c87 MK |
21 | P9_TSTATFS = 8, |
22 | P9_RSTATFS, | |
771e9d4c MK |
23 | P9_TLOPEN = 12, |
24 | P9_RLOPEN, | |
c1568af5 VJ |
25 | P9_TLCREATE = 14, |
26 | P9_RLCREATE, | |
08c60fc9 VJ |
27 | P9_TSYMLINK = 16, |
28 | P9_RSYMLINK, | |
5268cecc MK |
29 | P9_TMKNOD = 18, |
30 | P9_RMKNOD, | |
c7b4b0b3 MK |
31 | P9_TRENAME = 20, |
32 | P9_RRENAME, | |
df0973a4 MK |
33 | P9_TREADLINK = 22, |
34 | P9_RREADLINK, | |
00ede4c2 SK |
35 | P9_TGETATTR = 24, |
36 | P9_RGETATTR, | |
c79ce737 SK |
37 | P9_TSETATTR = 26, |
38 | P9_RSETATTR, | |
fa32ef88 AK |
39 | P9_TXATTRWALK = 30, |
40 | P9_RXATTRWALK, | |
10b468bd AK |
41 | P9_TXATTRCREATE = 32, |
42 | P9_RXATTRCREATE, | |
c18e2f94 SK |
43 | P9_TREADDIR = 40, |
44 | P9_RREADDIR, | |
b41e95d3 VJ |
45 | P9_TFSYNC = 50, |
46 | P9_RFSYNC, | |
82cc3ee8 MK |
47 | P9_TLOCK = 52, |
48 | P9_RLOCK, | |
8f354003 MK |
49 | P9_TGETLOCK = 54, |
50 | P9_RGETLOCK, | |
b2c224be VJ |
51 | P9_TLINK = 70, |
52 | P9_RLINK, | |
b67592ea MK |
53 | P9_TMKDIR = 72, |
54 | P9_RMKDIR, | |
89bf6593 AK |
55 | P9_TRENAMEAT = 74, |
56 | P9_RRENAMEAT, | |
7834cf77 AK |
57 | P9_TUNLINKAT = 76, |
58 | P9_RUNLINKAT, | |
9f107513 AL |
59 | P9_TVERSION = 100, |
60 | P9_RVERSION, | |
61 | P9_TAUTH = 102, | |
62 | P9_RAUTH, | |
63 | P9_TATTACH = 104, | |
64 | P9_RATTACH, | |
65 | P9_TERROR = 106, | |
66 | P9_RERROR, | |
67 | P9_TFLUSH = 108, | |
68 | P9_RFLUSH, | |
69 | P9_TWALK = 110, | |
70 | P9_RWALK, | |
71 | P9_TOPEN = 112, | |
72 | P9_ROPEN, | |
73 | P9_TCREATE = 114, | |
74 | P9_RCREATE, | |
75 | P9_TREAD = 116, | |
76 | P9_RREAD, | |
77 | P9_TWRITE = 118, | |
78 | P9_RWRITE, | |
79 | P9_TCLUNK = 120, | |
80 | P9_RCLUNK, | |
81 | P9_TREMOVE = 122, | |
82 | P9_RREMOVE, | |
83 | P9_TSTAT = 124, | |
84 | P9_RSTAT, | |
85 | P9_TWSTAT = 126, | |
86 | P9_RWSTAT, | |
87 | }; | |
88 | ||
89 | ||
90 | /* qid.types */ | |
91 | enum { | |
92 | P9_QTDIR = 0x80, | |
93 | P9_QTAPPEND = 0x40, | |
94 | P9_QTEXCL = 0x20, | |
95 | P9_QTMOUNT = 0x10, | |
96 | P9_QTAUTH = 0x08, | |
97 | P9_QTTMP = 0x04, | |
98 | P9_QTSYMLINK = 0x02, | |
99 | P9_QTLINK = 0x01, | |
100 | P9_QTFILE = 0x00, | |
101 | }; | |
102 | ||
84151514 MK |
103 | enum p9_proto_version { |
104 | V9FS_PROTO_2000U = 0x01, | |
105 | V9FS_PROTO_2000L = 0x02, | |
106 | }; | |
107 | ||
9f107513 AL |
108 | #define P9_NOTAG (u16)(~0) |
109 | #define P9_NOFID (u32)(~0) | |
110 | #define P9_MAXWELEM 16 | |
7a462745 AK |
111 | |
112 | #define FID_REFERENCED 0x1 | |
113 | #define FID_NON_RECLAIMABLE 0x2 | |
faa44e3d VJ |
114 | static inline const char *rpath(FsContext *ctx, const char *path, char *buffer) |
115 | { | |
116 | snprintf(buffer, PATH_MAX, "%s/%s", ctx->fs_root, path); | |
117 | return buffer; | |
118 | } | |
9f107513 | 119 | |
5e94c103 MK |
120 | /* |
121 | * ample room for Twrite/Rread header | |
122 | * size[4] Tread/Twrite tag[2] fid[4] offset[8] count[4] | |
123 | */ | |
124 | #define P9_IOHDRSZ 24 | |
125 | ||
9f107513 | 126 | typedef struct V9fsPDU V9fsPDU; |
ff06030f | 127 | struct V9fsState; |
9f107513 AL |
128 | |
129 | struct V9fsPDU | |
130 | { | |
131 | uint32_t size; | |
132 | uint16_t tag; | |
133 | uint8_t id; | |
bccacf6c AK |
134 | uint8_t cancelled; |
135 | CoQueue complete; | |
9f107513 | 136 | VirtQueueElement elem; |
ff06030f | 137 | struct V9fsState *s; |
9f107513 AL |
138 | QLIST_ENTRY(V9fsPDU) next; |
139 | }; | |
140 | ||
141 | ||
142 | /* FIXME | |
143 | * 1) change user needs to set groups and stuff | |
144 | */ | |
145 | ||
146 | /* from Linux's linux/virtio_9p.h */ | |
147 | ||
148 | /* The ID for virtio console */ | |
149 | #define VIRTIO_ID_9P 9 | |
150 | #define MAX_REQ 128 | |
151 | #define MAX_TAG_LEN 32 | |
152 | ||
153 | #define BUG_ON(cond) assert(!(cond)) | |
154 | ||
155 | typedef struct V9fsFidState V9fsFidState; | |
156 | ||
157 | typedef struct V9fsString | |
158 | { | |
159 | int16_t size; | |
160 | char *data; | |
161 | } V9fsString; | |
162 | ||
163 | typedef struct V9fsQID | |
164 | { | |
165 | int8_t type; | |
166 | int32_t version; | |
167 | int64_t path; | |
168 | } V9fsQID; | |
169 | ||
170 | typedef struct V9fsStat | |
171 | { | |
172 | int16_t size; | |
173 | int16_t type; | |
174 | int32_t dev; | |
175 | V9fsQID qid; | |
176 | int32_t mode; | |
177 | int32_t atime; | |
178 | int32_t mtime; | |
179 | int64_t length; | |
180 | V9fsString name; | |
181 | V9fsString uid; | |
182 | V9fsString gid; | |
183 | V9fsString muid; | |
184 | /* 9p2000.u */ | |
185 | V9fsString extension; | |
186 | int32_t n_uid; | |
187 | int32_t n_gid; | |
188 | int32_t n_muid; | |
189 | } V9fsStat; | |
190 | ||
d62dbb51 AK |
191 | enum { |
192 | P9_FID_NONE = 0, | |
193 | P9_FID_FILE, | |
194 | P9_FID_DIR, | |
195 | P9_FID_XATTR, | |
196 | }; | |
197 | ||
198 | typedef struct V9fsXattr | |
199 | { | |
200 | int64_t copied_len; | |
201 | int64_t len; | |
202 | void *value; | |
203 | V9fsString name; | |
204 | int flags; | |
205 | } V9fsXattr; | |
206 | ||
cc720ddb AK |
207 | /* |
208 | * Filled by fs driver on open and other | |
209 | * calls. | |
210 | */ | |
211 | union V9fsFidOpenState { | |
212 | int fd; | |
213 | DIR *dir; | |
214 | V9fsXattr xattr; | |
9db221ae AK |
215 | /* |
216 | * private pointer for fs drivers, that | |
217 | * have its own internal representation of | |
218 | * open files. | |
219 | */ | |
220 | void *private; | |
cc720ddb AK |
221 | }; |
222 | ||
9f107513 AL |
223 | struct V9fsFidState |
224 | { | |
d62dbb51 | 225 | int fid_type; |
9f107513 | 226 | int32_t fid; |
2289be19 | 227 | V9fsPath path; |
cc720ddb AK |
228 | V9fsFidOpenState fs; |
229 | V9fsFidOpenState fs_reclaim; | |
7a462745 AK |
230 | int flags; |
231 | int open_flags; | |
9f107513 | 232 | uid_t uid; |
84dfb926 AK |
233 | int ref; |
234 | int clunked; | |
9f107513 | 235 | V9fsFidState *next; |
7a462745 | 236 | V9fsFidState *rclm_lst; |
9f107513 AL |
237 | }; |
238 | ||
239 | typedef struct V9fsState | |
240 | { | |
241 | VirtIODevice vdev; | |
242 | VirtQueue *vq; | |
243 | V9fsPDU pdus[MAX_REQ]; | |
244 | QLIST_HEAD(, V9fsPDU) free_list; | |
bccacf6c | 245 | QLIST_HEAD(, V9fsPDU) active_list; |
9f107513 AL |
246 | V9fsFidState *fid_list; |
247 | FileOperations *ops; | |
248 | FsContext ctx; | |
e9a0152b | 249 | char *tag; |
9f107513 | 250 | size_t config_size; |
84151514 | 251 | enum p9_proto_version proto_version; |
5e94c103 | 252 | int32_t msize; |
02cb7f3a AK |
253 | /* |
254 | * lock ensuring atomic path update | |
255 | * on rename. | |
256 | */ | |
257 | CoRwlock rename_lock; | |
e9a0152b AK |
258 | int32_t root_fid; |
259 | Error *migration_blocker; | |
9f107513 AL |
260 | } V9fsState; |
261 | ||
fac4f111 VJ |
262 | typedef struct V9fsStatState { |
263 | V9fsPDU *pdu; | |
264 | size_t offset; | |
265 | V9fsStat v9stat; | |
266 | V9fsFidState *fidp; | |
267 | struct stat stbuf; | |
268 | } V9fsStatState; | |
269 | ||
00ede4c2 SK |
270 | typedef struct V9fsStatDotl { |
271 | uint64_t st_result_mask; | |
272 | V9fsQID qid; | |
273 | uint32_t st_mode; | |
274 | uint32_t st_uid; | |
275 | uint32_t st_gid; | |
276 | uint64_t st_nlink; | |
277 | uint64_t st_rdev; | |
278 | uint64_t st_size; | |
279 | uint64_t st_blksize; | |
280 | uint64_t st_blocks; | |
281 | uint64_t st_atime_sec; | |
282 | uint64_t st_atime_nsec; | |
283 | uint64_t st_mtime_sec; | |
284 | uint64_t st_mtime_nsec; | |
285 | uint64_t st_ctime_sec; | |
286 | uint64_t st_ctime_nsec; | |
287 | uint64_t st_btime_sec; | |
288 | uint64_t st_btime_nsec; | |
289 | uint64_t st_gen; | |
290 | uint64_t st_data_version; | |
291 | } V9fsStatDotl; | |
292 | ||
fac4f111 VJ |
293 | typedef struct V9fsOpenState { |
294 | V9fsPDU *pdu; | |
295 | size_t offset; | |
771e9d4c | 296 | int32_t mode; |
fac4f111 VJ |
297 | V9fsFidState *fidp; |
298 | V9fsQID qid; | |
299 | struct stat stbuf; | |
5e94c103 | 300 | int iounit; |
fac4f111 VJ |
301 | } V9fsOpenState; |
302 | ||
303 | typedef struct V9fsReadState { | |
304 | V9fsPDU *pdu; | |
305 | size_t offset; | |
306 | int32_t count; | |
307 | int32_t total; | |
308 | int64_t off; | |
309 | V9fsFidState *fidp; | |
310 | struct iovec iov[128]; /* FIXME: bad, bad, bad */ | |
311 | struct iovec *sg; | |
312 | off_t dir_pos; | |
313 | struct dirent *dent; | |
314 | struct stat stbuf; | |
315 | V9fsString name; | |
316 | V9fsStat v9stat; | |
317 | int32_t len; | |
318 | int32_t cnt; | |
319 | int32_t max_count; | |
320 | } V9fsReadState; | |
321 | ||
322 | typedef struct V9fsWriteState { | |
323 | V9fsPDU *pdu; | |
324 | size_t offset; | |
325 | int32_t len; | |
326 | int32_t count; | |
327 | int32_t total; | |
328 | int64_t off; | |
329 | V9fsFidState *fidp; | |
330 | struct iovec iov[128]; /* FIXME: bad, bad, bad */ | |
331 | struct iovec *sg; | |
332 | int cnt; | |
333 | } V9fsWriteState; | |
334 | ||
c79ce737 SK |
335 | typedef struct V9fsIattr |
336 | { | |
337 | int32_t valid; | |
338 | int32_t mode; | |
339 | int32_t uid; | |
340 | int32_t gid; | |
341 | int64_t size; | |
342 | int64_t atime_sec; | |
343 | int64_t atime_nsec; | |
344 | int64_t mtime_sec; | |
345 | int64_t mtime_nsec; | |
346 | } V9fsIattr; | |
347 | ||
9f107513 AL |
348 | struct virtio_9p_config |
349 | { | |
350 | /* number of characters in tag */ | |
351 | uint16_t tag_len; | |
352 | /* Variable size tag name */ | |
353 | uint8_t tag[0]; | |
541dc0d4 | 354 | } QEMU_PACKED; |
9f107513 | 355 | |
5268cecc MK |
356 | typedef struct V9fsMkState { |
357 | V9fsPDU *pdu; | |
358 | size_t offset; | |
359 | V9fsQID qid; | |
360 | struct stat stbuf; | |
361 | V9fsString name; | |
362 | V9fsString fullname; | |
363 | } V9fsMkState; | |
364 | ||
9844081b MK |
365 | /* 9p2000.L open flags */ |
366 | #define P9_DOTL_RDONLY 00000000 | |
367 | #define P9_DOTL_WRONLY 00000001 | |
368 | #define P9_DOTL_RDWR 00000002 | |
369 | #define P9_DOTL_NOACCESS 00000003 | |
370 | #define P9_DOTL_CREATE 00000100 | |
371 | #define P9_DOTL_EXCL 00000200 | |
372 | #define P9_DOTL_NOCTTY 00000400 | |
373 | #define P9_DOTL_TRUNC 00001000 | |
374 | #define P9_DOTL_APPEND 00002000 | |
375 | #define P9_DOTL_NONBLOCK 00004000 | |
376 | #define P9_DOTL_DSYNC 00010000 | |
377 | #define P9_DOTL_FASYNC 00020000 | |
378 | #define P9_DOTL_DIRECT 00040000 | |
379 | #define P9_DOTL_LARGEFILE 00100000 | |
380 | #define P9_DOTL_DIRECTORY 00200000 | |
381 | #define P9_DOTL_NOFOLLOW 00400000 | |
382 | #define P9_DOTL_NOATIME 01000000 | |
383 | #define P9_DOTL_CLOEXEC 02000000 | |
384 | #define P9_DOTL_SYNC 04000000 | |
385 | ||
386 | /* 9p2000.L at flags */ | |
387 | #define P9_DOTL_AT_REMOVEDIR 0x200 | |
388 | ||
ea60f315 MK |
389 | /* 9P2000.L lock type */ |
390 | #define P9_LOCK_TYPE_RDLCK 0 | |
391 | #define P9_LOCK_TYPE_WRLCK 1 | |
392 | #define P9_LOCK_TYPE_UNLCK 2 | |
393 | ||
82cc3ee8 MK |
394 | #define P9_LOCK_SUCCESS 0 |
395 | #define P9_LOCK_BLOCKED 1 | |
396 | #define P9_LOCK_ERROR 2 | |
397 | #define P9_LOCK_GRACE 3 | |
398 | ||
399 | #define P9_LOCK_FLAGS_BLOCK 1 | |
400 | #define P9_LOCK_FLAGS_RECLAIM 2 | |
401 | ||
402 | typedef struct V9fsFlock | |
403 | { | |
404 | uint8_t type; | |
405 | uint32_t flags; | |
406 | uint64_t start; /* absolute offset */ | |
407 | uint64_t length; | |
408 | uint32_t proc_id; | |
409 | V9fsString client_id; | |
410 | } V9fsFlock; | |
411 | ||
8f354003 MK |
412 | typedef struct V9fsGetlock |
413 | { | |
414 | uint8_t type; | |
415 | uint64_t start; /* absolute offset */ | |
416 | uint64_t length; | |
417 | uint32_t proc_id; | |
418 | V9fsString client_id; | |
419 | } V9fsGetlock; | |
420 | ||
7a462745 AK |
421 | extern int open_fd_hw; |
422 | extern int total_open_fd; | |
423 | ||
64b85a8f BS |
424 | size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count, |
425 | size_t offset, size_t size, int pack); | |
9f107513 AL |
426 | |
427 | static inline size_t do_pdu_unpack(void *dst, struct iovec *sg, int sg_count, | |
428 | size_t offset, size_t size) | |
429 | { | |
430 | return pdu_packunpack(dst, sg, sg_count, offset, size, 0); | |
431 | } | |
432 | ||
532decb7 AK |
433 | static inline void v9fs_path_write_lock(V9fsState *s) |
434 | { | |
c98f1d4a | 435 | if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) { |
532decb7 AK |
436 | qemu_co_rwlock_wrlock(&s->rename_lock); |
437 | } | |
438 | } | |
439 | ||
440 | static inline void v9fs_path_read_lock(V9fsState *s) | |
441 | { | |
c98f1d4a | 442 | if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) { |
532decb7 AK |
443 | qemu_co_rwlock_rdlock(&s->rename_lock); |
444 | } | |
445 | } | |
446 | ||
447 | static inline void v9fs_path_unlock(V9fsState *s) | |
448 | { | |
c98f1d4a | 449 | if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) { |
532decb7 AK |
450 | qemu_co_rwlock_unlock(&s->rename_lock); |
451 | } | |
452 | } | |
453 | ||
bccacf6c AK |
454 | static inline uint8_t v9fs_request_cancelled(V9fsPDU *pdu) |
455 | { | |
456 | return pdu->cancelled; | |
457 | } | |
458 | ||
f4f61d27 | 459 | extern void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq); |
7a462745 | 460 | extern void virtio_9p_set_fd_limit(void); |
bccacf6c | 461 | extern void v9fs_reclaim_fd(V9fsPDU *pdu); |
70c18fc0 AK |
462 | extern void v9fs_string_init(V9fsString *str); |
463 | extern void v9fs_string_free(V9fsString *str); | |
464 | extern void v9fs_string_null(V9fsString *str); | |
465 | extern void v9fs_string_sprintf(V9fsString *str, const char *fmt, ...); | |
466 | extern void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs); | |
2289be19 AK |
467 | extern void v9fs_path_init(V9fsPath *path); |
468 | extern void v9fs_path_free(V9fsPath *path); | |
469 | extern void v9fs_path_copy(V9fsPath *lhs, V9fsPath *rhs); | |
470 | extern int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath, | |
471 | const char *name, V9fsPath *path); | |
9f107513 | 472 | #endif |