virtio-9p.h 8.2 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
#ifndef _QEMU_VIRTIO_9P_H
#define _QEMU_VIRTIO_9P_H

#include <sys/types.h>
#include <dirent.h>
#include <sys/time.h>
#include <utime.h>

#include "file-op-9p.h"

/* The feature bitmap for virtio 9P */
/* The mount point is specified in a config variable */
#define VIRTIO_9P_MOUNT_TAG 0

enum {
16 17
    P9_TLERROR = 6,
    P9_RLERROR,
18 19
    P9_TSTATFS = 8,
    P9_RSTATFS,
20 21
    P9_TLOPEN = 12,
    P9_RLOPEN,
22 23
    P9_TLCREATE = 14,
    P9_RLCREATE,
24 25
    P9_TSYMLINK = 16,
    P9_RSYMLINK,
26 27
    P9_TMKNOD = 18,
    P9_RMKNOD,
28 29
    P9_TRENAME = 20,
    P9_RRENAME,
30 31
    P9_TGETATTR = 24,
    P9_RGETATTR,
32 33
    P9_TSETATTR = 26,
    P9_RSETATTR,
34 35
    P9_TXATTRWALK = 30,
    P9_RXATTRWALK,
36 37
    P9_TXATTRCREATE = 32,
    P9_RXATTRCREATE,
38 39
    P9_TREADDIR = 40,
    P9_RREADDIR,
40 41
    P9_TLINK = 70,
    P9_RLINK,
42 43
    P9_TMKDIR = 72,
    P9_RMKDIR,
44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87
    P9_TVERSION = 100,
    P9_RVERSION,
    P9_TAUTH = 102,
    P9_RAUTH,
    P9_TATTACH = 104,
    P9_RATTACH,
    P9_TERROR = 106,
    P9_RERROR,
    P9_TFLUSH = 108,
    P9_RFLUSH,
    P9_TWALK = 110,
    P9_RWALK,
    P9_TOPEN = 112,
    P9_ROPEN,
    P9_TCREATE = 114,
    P9_RCREATE,
    P9_TREAD = 116,
    P9_RREAD,
    P9_TWRITE = 118,
    P9_RWRITE,
    P9_TCLUNK = 120,
    P9_RCLUNK,
    P9_TREMOVE = 122,
    P9_RREMOVE,
    P9_TSTAT = 124,
    P9_RSTAT,
    P9_TWSTAT = 126,
    P9_RWSTAT,
};


/* qid.types */
enum {
    P9_QTDIR = 0x80,
    P9_QTAPPEND = 0x40,
    P9_QTEXCL = 0x20,
    P9_QTMOUNT = 0x10,
    P9_QTAUTH = 0x08,
    P9_QTTMP = 0x04,
    P9_QTSYMLINK = 0x02,
    P9_QTLINK = 0x01,
    P9_QTFILE = 0x00,
};

88 89 90 91 92
enum p9_proto_version {
    V9FS_PROTO_2000U = 0x01,
    V9FS_PROTO_2000L = 0x02,
};

93 94 95 96
#define P9_NOTAG    (u16)(~0)
#define P9_NOFID    (u32)(~0)
#define P9_MAXWELEM 16

97 98 99 100 101 102
/*
 * ample room for Twrite/Rread header
 * size[4] Tread/Twrite tag[2] fid[4] offset[8] count[4]
 */
#define P9_IOHDRSZ 24

103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163
typedef struct V9fsPDU V9fsPDU;

struct V9fsPDU
{
    uint32_t size;
    uint16_t tag;
    uint8_t id;
    VirtQueueElement elem;
    QLIST_ENTRY(V9fsPDU) next;
};


/* FIXME
 * 1) change user needs to set groups and stuff
 */

/* from Linux's linux/virtio_9p.h */

/* The ID for virtio console */
#define VIRTIO_ID_9P    9
#define MAX_REQ         128
#define MAX_TAG_LEN     32

#define BUG_ON(cond) assert(!(cond))

typedef struct V9fsFidState V9fsFidState;

typedef struct V9fsString
{
    int16_t size;
    char *data;
} V9fsString;

typedef struct V9fsQID
{
    int8_t type;
    int32_t version;
    int64_t path;
} V9fsQID;

typedef struct V9fsStat
{
    int16_t size;
    int16_t type;
    int32_t dev;
    V9fsQID qid;
    int32_t mode;
    int32_t atime;
    int32_t mtime;
    int64_t length;
    V9fsString name;
    V9fsString uid;
    V9fsString gid;
    V9fsString muid;
    /* 9p2000.u */
    V9fsString extension;
   int32_t n_uid;
    int32_t n_gid;
    int32_t n_muid;
} V9fsStat;

164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179
enum {
    P9_FID_NONE = 0,
    P9_FID_FILE,
    P9_FID_DIR,
    P9_FID_XATTR,
};

typedef struct V9fsXattr
{
    int64_t copied_len;
    int64_t len;
    void *value;
    V9fsString name;
    int flags;
} V9fsXattr;

180 181
struct V9fsFidState
{
182
    int fid_type;
183 184
    int32_t fid;
    V9fsString path;
185 186 187 188 189
    union {
	int fd;
	DIR *dir;
	V9fsXattr xattr;
    } fs;
190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205
    uid_t uid;
    V9fsFidState *next;
};

typedef struct V9fsState
{
    VirtIODevice vdev;
    VirtQueue *vq;
    V9fsPDU pdus[MAX_REQ];
    QLIST_HEAD(, V9fsPDU) free_list;
    V9fsFidState *fid_list;
    FileOperations *ops;
    FsContext ctx;
    uint16_t tag_len;
    uint8_t *tag;
    size_t config_size;
206
    enum p9_proto_version proto_version;
207
    int32_t msize;
208 209
} V9fsState;

210 211 212 213 214 215 216 217 218 219 220
typedef struct V9fsCreateState {
    V9fsPDU *pdu;
    size_t offset;
    V9fsFidState *fidp;
    V9fsQID qid;
    int32_t perm;
    int8_t mode;
    struct stat stbuf;
    V9fsString name;
    V9fsString extension;
    V9fsString fullname;
221
    int iounit;
222 223
} V9fsCreateState;

224 225 226 227 228 229 230 231 232 233 234
typedef struct V9fsLcreateState {
    V9fsPDU *pdu;
    size_t offset;
    V9fsFidState *fidp;
    V9fsQID qid;
    int32_t iounit;
    struct stat stbuf;
    V9fsString name;
    V9fsString fullname;
} V9fsLcreateState;

235 236 237 238 239 240 241 242
typedef struct V9fsStatState {
    V9fsPDU *pdu;
    size_t offset;
    V9fsStat v9stat;
    V9fsFidState *fidp;
    struct stat stbuf;
} V9fsStatState;

243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273
typedef struct V9fsStatDotl {
    uint64_t st_result_mask;
    V9fsQID qid;
    uint32_t st_mode;
    uint32_t st_uid;
    uint32_t st_gid;
    uint64_t st_nlink;
    uint64_t st_rdev;
    uint64_t st_size;
    uint64_t st_blksize;
    uint64_t st_blocks;
    uint64_t st_atime_sec;
    uint64_t st_atime_nsec;
    uint64_t st_mtime_sec;
    uint64_t st_mtime_nsec;
    uint64_t st_ctime_sec;
    uint64_t st_ctime_nsec;
    uint64_t st_btime_sec;
    uint64_t st_btime_nsec;
    uint64_t st_gen;
    uint64_t st_data_version;
} V9fsStatDotl;

typedef struct V9fsStatStateDotl {
    V9fsPDU *pdu;
    size_t offset;
    V9fsStatDotl v9stat_dotl;
    struct stat stbuf;
} V9fsStatStateDotl;


274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289
typedef struct V9fsWalkState {
    V9fsPDU *pdu;
    size_t offset;
    int16_t nwnames;
    int name_idx;
    V9fsQID *qids;
    V9fsFidState *fidp;
    V9fsFidState *newfidp;
    V9fsString path;
    V9fsString *wnames;
    struct stat stbuf;
} V9fsWalkState;

typedef struct V9fsOpenState {
    V9fsPDU *pdu;
    size_t offset;
290
    int32_t mode;
291 292 293
    V9fsFidState *fidp;
    V9fsQID qid;
    struct stat stbuf;
294
    int iounit;
295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344
} V9fsOpenState;

typedef struct V9fsReadState {
    V9fsPDU *pdu;
    size_t offset;
    int32_t count;
    int32_t total;
    int64_t off;
    V9fsFidState *fidp;
    struct iovec iov[128]; /* FIXME: bad, bad, bad */
    struct iovec *sg;
    off_t dir_pos;
    struct dirent *dent;
    struct stat stbuf;
    V9fsString name;
    V9fsStat v9stat;
    int32_t len;
    int32_t cnt;
    int32_t max_count;
} V9fsReadState;

typedef struct V9fsWriteState {
    V9fsPDU *pdu;
    size_t offset;
    int32_t len;
    int32_t count;
    int32_t total;
    int64_t off;
    V9fsFidState *fidp;
    struct iovec iov[128]; /* FIXME: bad, bad, bad */
    struct iovec *sg;
    int cnt;
} V9fsWriteState;

typedef struct V9fsRemoveState {
    V9fsPDU *pdu;
    size_t offset;
    V9fsFidState *fidp;
} V9fsRemoveState;

typedef struct V9fsWstatState
{
    V9fsPDU *pdu;
    size_t offset;
    int16_t unused;
    V9fsStat v9stat;
    V9fsFidState *fidp;
    struct stat stbuf;
} V9fsWstatState;

345 346 347 348 349 350 351 352 353 354 355 356
typedef struct V9fsSymlinkState
{
    V9fsPDU *pdu;
    size_t offset;
    V9fsString name;
    V9fsString symname;
    V9fsString fullname;
    V9fsFidState *dfidp;
    V9fsQID qid;
    struct stat stbuf;
} V9fsSymlinkState;

357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377
typedef struct V9fsIattr
{
    int32_t valid;
    int32_t mode;
    int32_t uid;
    int32_t gid;
    int64_t size;
    int64_t atime_sec;
    int64_t atime_nsec;
    int64_t mtime_sec;
    int64_t mtime_nsec;
} V9fsIattr;

typedef struct V9fsSetattrState
{
    V9fsPDU *pdu;
    size_t offset;
    V9fsIattr v9iattr;
    V9fsFidState *fidp;
} V9fsSetattrState;

378 379 380 381 382 383 384 385
struct virtio_9p_config
{
    /* number of characters in tag */
    uint16_t tag_len;
    /* Variable size tag name */
    uint8_t tag[0];
} __attribute__((packed));

386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407
typedef struct V9fsStatfs
{
    uint32_t f_type;
    uint32_t f_bsize;
    uint64_t f_blocks;
    uint64_t f_bfree;
    uint64_t f_bavail;
    uint64_t f_files;
    uint64_t f_ffree;
    uint64_t fsid_val;
    uint32_t f_namelen;
} V9fsStatfs;

typedef struct V9fsStatfsState {
    V9fsPDU *pdu;
    size_t offset;
    int32_t fid;
    V9fsStatfs v9statfs;
    V9fsFidState *fidp;
    struct statfs stbuf;
} V9fsStatfsState;

408 409 410 411 412 413 414 415 416
typedef struct V9fsMkState {
    V9fsPDU *pdu;
    size_t offset;
    V9fsQID qid;
    struct stat stbuf;
    V9fsString name;
    V9fsString fullname;
} V9fsMkState;

417 418 419 420 421 422 423 424
typedef struct V9fsRenameState {
    V9fsPDU *pdu;
    V9fsFidState *fidp;
    size_t offset;
    int32_t newdirfid;
    V9fsString name;
} V9fsRenameState;

425 426 427 428 429 430 431 432 433 434 435 436
typedef struct V9fsXattrState
{
    V9fsPDU *pdu;
    size_t offset;
    V9fsFidState *file_fidp;
    V9fsFidState *xattr_fidp;
    V9fsString name;
    int64_t size;
    int flags;
    void *value;
} V9fsXattrState;

437 438 439 440 441 442 443 444 445 446
extern size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count,
                            size_t offset, size_t size, int pack);

static inline size_t do_pdu_unpack(void *dst, struct iovec *sg, int sg_count,
                        size_t offset, size_t size)
{
    return pdu_packunpack(dst, sg, sg_count, offset, size, 0);
}

#endif