hw/virtio-9p.h

   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>
   8
   9 #include "file-op-9p.h"
  10
  11 /* The feature bitmap for virtio 9P */
  12 /* The mount point is specified in a config variable */
  13 #define VIRTIO_9P_MOUNT_TAG 0
  14
  15 enum {
  16     P9_TLERROR = 6,
  17     P9_RLERROR,
  18     P9_TSTATFS = 8,
  19     P9_RSTATFS,
  20     P9_TLOPEN = 12,
  21     P9_RLOPEN,
  22     P9_TLCREATE = 14,
  23     P9_RLCREATE,
  24     P9_TSYMLINK = 16,
  25     P9_RSYMLINK,
  26     P9_TMKNOD = 18,
  27     P9_RMKNOD,
  28     P9_TRENAME = 20,
  29     P9_RRENAME,
  30     P9_TGETATTR = 24,
  31     P9_RGETATTR,
  32     P9_TSETATTR = 26,
  33     P9_RSETATTR,
  34     P9_TXATTRWALK = 30,
  35     P9_RXATTRWALK,
  36     P9_TXATTRCREATE = 32,
  37     P9_RXATTRCREATE,
  38     P9_TREADDIR = 40,
  39     P9_RREADDIR,
  40     P9_TLOCK = 52,
  41     P9_RLOCK,
  42     P9_TGETLOCK = 54,
  43     P9_RGETLOCK,
  44     P9_TLINK = 70,
  45     P9_RLINK,
  46     P9_TMKDIR = 72,
  47     P9_RMKDIR,
  48     P9_TVERSION = 100,
  49     P9_RVERSION,
  50     P9_TAUTH = 102,
  51     P9_RAUTH,
  52     P9_TATTACH = 104,
  53     P9_RATTACH,
  54     P9_TERROR = 106,
  55     P9_RERROR,
  56     P9_TFLUSH = 108,
  57     P9_RFLUSH,
  58     P9_TWALK = 110,
  59     P9_RWALK,
  60     P9_TOPEN = 112,
  61     P9_ROPEN,
  62     P9_TCREATE = 114,
  63     P9_RCREATE,
  64     P9_TREAD = 116,
  65     P9_RREAD,
  66     P9_TWRITE = 118,
  67     P9_RWRITE,
  68     P9_TCLUNK = 120,
  69     P9_RCLUNK,
  70     P9_TREMOVE = 122,
  71     P9_RREMOVE,
  72     P9_TSTAT = 124,
  73     P9_RSTAT,
  74     P9_TWSTAT = 126,
  75     P9_RWSTAT,
  76 };
  77
  78
  79 /* qid.types */
  80 enum {
  81     P9_QTDIR = 0x80,
  82     P9_QTAPPEND = 0x40,
  83     P9_QTEXCL = 0x20,
  84     P9_QTMOUNT = 0x10,
  85     P9_QTAUTH = 0x08,
  86     P9_QTTMP = 0x04,
  87     P9_QTSYMLINK = 0x02,
  88     P9_QTLINK = 0x01,
  89     P9_QTFILE = 0x00,
  90 };
  91
  92 enum p9_proto_version {
  93     V9FS_PROTO_2000U = 0x01,
  94     V9FS_PROTO_2000L = 0x02,
  95 };
  96
  97 #define P9_NOTAG    (u16)(~0)
  98 #define P9_NOFID    (u32)(~0)
  99 #define P9_MAXWELEM 16
 100
 101 /*
 102  * ample room for Twrite/Rread header
 103  * size[4] Tread/Twrite tag[2] fid[4] offset[8] count[4]
 104  */
 105 #define P9_IOHDRSZ 24
 106
 107 typedef struct V9fsPDU V9fsPDU;
 108
 109 struct V9fsPDU
 110 {
 111     uint32_t size;
 112     uint16_t tag;
 113     uint8_t id;
 114     VirtQueueElement elem;
 115     QLIST_ENTRY(V9fsPDU) next;
 116 };
 117
 118
 119 /* FIXME
 120  * 1) change user needs to set groups and stuff
 121  */
 122
 123 /* from Linux's linux/virtio_9p.h */
 124
 125 /* The ID for virtio console */
 126 #define VIRTIO_ID_9P    9
 127 #define MAX_REQ         128
 128 #define MAX_TAG_LEN     32
 129
 130 #define BUG_ON(cond) assert(!(cond))
 131
 132 typedef struct V9fsFidState V9fsFidState;
 133
 134 typedef struct V9fsString
 135 {
 136     int16_t size;
 137     char *data;
 138 } V9fsString;
 139
 140 typedef struct V9fsQID
 141 {
 142     int8_t type;
 143     int32_t version;
 144     int64_t path;
 145 } V9fsQID;
 146
 147 typedef struct V9fsStat
 148 {
 149     int16_t size;
 150     int16_t type;
 151     int32_t dev;
 152     V9fsQID qid;
 153     int32_t mode;
 154     int32_t atime;
 155     int32_t mtime;
 156     int64_t length;
 157     V9fsString name;
 158     V9fsString uid;
 159     V9fsString gid;
 160     V9fsString muid;
 161     /* 9p2000.u */
 162     V9fsString extension;
 163    int32_t n_uid;
 164     int32_t n_gid;
 165     int32_t n_muid;
 166 } V9fsStat;
 167
 168 enum {
 169     P9_FID_NONE = 0,
 170     P9_FID_FILE,
 171     P9_FID_DIR,
 172     P9_FID_XATTR,
 173 };
 174
 175 typedef struct V9fsXattr
 176 {
 177     int64_t copied_len;
 178     int64_t len;
 179     void *value;
 180     V9fsString name;
 181     int flags;
 182 } V9fsXattr;
 183
 184 struct V9fsFidState
 185 {
 186     int fid_type;
 187     int32_t fid;
 188     V9fsString path;
 189     union {
 190         int fd;
 191         DIR *dir;
 192         V9fsXattr xattr;
 193     } fs;
 194     uid_t uid;
 195     V9fsFidState *next;
 196 };
 197
 198 typedef struct V9fsState
 199 {
 200     VirtIODevice vdev;
 201     VirtQueue *vq;
 202     V9fsPDU pdus[MAX_REQ];
 203     QLIST_HEAD(, V9fsPDU) free_list;
 204     V9fsFidState *fid_list;
 205     FileOperations *ops;
 206     FsContext ctx;
 207     uint16_t tag_len;
 208     uint8_t *tag;
 209     size_t config_size;
 210     enum p9_proto_version proto_version;
 211     int32_t msize;
 212 } V9fsState;
 213
 214 typedef struct V9fsCreateState {
 215     V9fsPDU *pdu;
 216     size_t offset;
 217     V9fsFidState *fidp;
 218     V9fsQID qid;
 219     int32_t perm;
 220     int8_t mode;
 221     struct stat stbuf;
 222     V9fsString name;
 223     V9fsString extension;
 224     V9fsString fullname;
 225     int iounit;
 226 } V9fsCreateState;
 227
 228 typedef struct V9fsLcreateState {
 229     V9fsPDU *pdu;
 230     size_t offset;
 231     V9fsFidState *fidp;
 232     V9fsQID qid;
 233     int32_t iounit;
 234     struct stat stbuf;
 235     V9fsString name;
 236     V9fsString fullname;
 237 } V9fsLcreateState;
 238
 239 typedef struct V9fsStatState {
 240     V9fsPDU *pdu;
 241     size_t offset;
 242     V9fsStat v9stat;
 243     V9fsFidState *fidp;
 244     struct stat stbuf;
 245 } V9fsStatState;
 246
 247 typedef struct V9fsStatDotl {
 248     uint64_t st_result_mask;
 249     V9fsQID qid;
 250     uint32_t st_mode;
 251     uint32_t st_uid;
 252     uint32_t st_gid;
 253     uint64_t st_nlink;
 254     uint64_t st_rdev;
 255     uint64_t st_size;
 256     uint64_t st_blksize;
 257     uint64_t st_blocks;
 258     uint64_t st_atime_sec;
 259     uint64_t st_atime_nsec;
 260     uint64_t st_mtime_sec;
 261     uint64_t st_mtime_nsec;
 262     uint64_t st_ctime_sec;
 263     uint64_t st_ctime_nsec;
 264     uint64_t st_btime_sec;
 265     uint64_t st_btime_nsec;
 266     uint64_t st_gen;
 267     uint64_t st_data_version;
 268 } V9fsStatDotl;
 269
 270 typedef struct V9fsStatStateDotl {
 271     V9fsPDU *pdu;
 272     size_t offset;
 273     V9fsStatDotl v9stat_dotl;
 274     struct stat stbuf;
 275 } V9fsStatStateDotl;
 276
 277
 278 typedef struct V9fsWalkState {
 279     V9fsPDU *pdu;
 280     size_t offset;
 281     int16_t nwnames;
 282     int name_idx;
 283     V9fsQID *qids;
 284     V9fsFidState *fidp;
 285     V9fsFidState *newfidp;
 286     V9fsString path;
 287     V9fsString *wnames;
 288     struct stat stbuf;
 289 } V9fsWalkState;
 290
 291 typedef struct V9fsOpenState {
 292     V9fsPDU *pdu;
 293     size_t offset;
 294     int32_t mode;
 295     V9fsFidState *fidp;
 296     V9fsQID qid;
 297     struct stat stbuf;
 298     int iounit;
 299 } V9fsOpenState;
 300
 301 typedef struct V9fsReadState {
 302     V9fsPDU *pdu;
 303     size_t offset;
 304     int32_t count;
 305     int32_t total;
 306     int64_t off;
 307     V9fsFidState *fidp;
 308     struct iovec iov[128]; /* FIXME: bad, bad, bad */
 309     struct iovec *sg;
 310     off_t dir_pos;
 311     struct dirent *dent;
 312     struct stat stbuf;
 313     V9fsString name;
 314     V9fsStat v9stat;
 315     int32_t len;
 316     int32_t cnt;
 317     int32_t max_count;
 318 } V9fsReadState;
 319
 320 typedef struct V9fsWriteState {
 321     V9fsPDU *pdu;
 322     size_t offset;
 323     int32_t len;
 324     int32_t count;
 325     int32_t total;
 326     int64_t off;
 327     V9fsFidState *fidp;
 328     struct iovec iov[128]; /* FIXME: bad, bad, bad */
 329     struct iovec *sg;
 330     int cnt;
 331 } V9fsWriteState;
 332
 333 typedef struct V9fsRemoveState {
 334     V9fsPDU *pdu;
 335     size_t offset;
 336     V9fsFidState *fidp;
 337 } V9fsRemoveState;
 338
 339 typedef struct V9fsWstatState
 340 {
 341     V9fsPDU *pdu;
 342     size_t offset;
 343     int16_t unused;
 344     V9fsStat v9stat;
 345     V9fsFidState *fidp;
 346     struct stat stbuf;
 347 } V9fsWstatState;
 348
 349 typedef struct V9fsSymlinkState
 350 {
 351     V9fsPDU *pdu;
 352     size_t offset;
 353     V9fsString name;
 354     V9fsString symname;
 355     V9fsString fullname;
 356     V9fsFidState *dfidp;
 357     V9fsQID qid;
 358     struct stat stbuf;
 359 } V9fsSymlinkState;
 360
 361 typedef struct V9fsIattr
 362 {
 363     int32_t valid;
 364     int32_t mode;
 365     int32_t uid;
 366     int32_t gid;
 367     int64_t size;
 368     int64_t atime_sec;
 369     int64_t atime_nsec;
 370     int64_t mtime_sec;
 371     int64_t mtime_nsec;
 372 } V9fsIattr;
 373
 374 typedef struct V9fsSetattrState
 375 {
 376     V9fsPDU *pdu;
 377     size_t offset;
 378     V9fsIattr v9iattr;
 379     V9fsFidState *fidp;
 380 } V9fsSetattrState;
 381
 382 struct virtio_9p_config
 383 {
 384     /* number of characters in tag */
 385     uint16_t tag_len;
 386     /* Variable size tag name */
 387     uint8_t tag[0];
 388 } __attribute__((packed));
 389
 390 typedef struct V9fsStatfs
 391 {
 392     uint32_t f_type;
 393     uint32_t f_bsize;
 394     uint64_t f_blocks;
 395     uint64_t f_bfree;
 396     uint64_t f_bavail;
 397     uint64_t f_files;
 398     uint64_t f_ffree;
 399     uint64_t fsid_val;
 400     uint32_t f_namelen;
 401 } V9fsStatfs;
 402
 403 typedef struct V9fsStatfsState {
 404     V9fsPDU *pdu;
 405     size_t offset;
 406     int32_t fid;
 407     V9fsStatfs v9statfs;
 408     V9fsFidState *fidp;
 409     struct statfs stbuf;
 410 } V9fsStatfsState;
 411
 412 typedef struct V9fsMkState {
 413     V9fsPDU *pdu;
 414     size_t offset;
 415     V9fsQID qid;
 416     struct stat stbuf;
 417     V9fsString name;
 418     V9fsString fullname;
 419 } V9fsMkState;
 420
 421 typedef struct V9fsRenameState {
 422     V9fsPDU *pdu;
 423     V9fsFidState *fidp;
 424     size_t offset;
 425     int32_t newdirfid;
 426     V9fsString name;
 427 } V9fsRenameState;
 428
 429 typedef struct V9fsXattrState
 430 {
 431     V9fsPDU *pdu;
 432     size_t offset;
 433     V9fsFidState *file_fidp;
 434     V9fsFidState *xattr_fidp;
 435     V9fsString name;
 436     int64_t size;
 437     int flags;
 438     void *value;
 439 } V9fsXattrState;
 440
 441 #define P9_LOCK_SUCCESS 0
 442 #define P9_LOCK_BLOCKED 1
 443 #define P9_LOCK_ERROR 2
 444 #define P9_LOCK_GRACE 3
 445
 446 #define P9_LOCK_FLAGS_BLOCK 1
 447 #define P9_LOCK_FLAGS_RECLAIM 2
 448
 449 typedef struct V9fsFlock
 450 {
 451     uint8_t type;
 452     uint32_t flags;
 453     uint64_t start; /* absolute offset */
 454     uint64_t length;
 455     uint32_t proc_id;
 456     V9fsString client_id;
 457 } V9fsFlock;
 458
 459 typedef struct V9fsLockState
 460 {
 461     V9fsPDU *pdu;
 462     size_t offset;
 463     int8_t status;
 464     struct stat stbuf;
 465     V9fsFidState *fidp;
 466     V9fsFlock *flock;
 467 } V9fsLockState;
 468
 469 typedef struct V9fsGetlock
 470 {
 471     uint8_t type;
 472     uint64_t start; /* absolute offset */
 473     uint64_t length;
 474     uint32_t proc_id;
 475     V9fsString client_id;
 476 } V9fsGetlock;
 477
 478 typedef struct V9fsGetlockState
 479 {
 480     V9fsPDU *pdu;
 481     size_t offset;
 482     struct stat stbuf;
 483     V9fsFidState *fidp;
 484     V9fsGetlock *glock;
 485 } V9fsGetlockState;
 486
 487
 488 extern size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count,
 489                             size_t offset, size_t size, int pack);
 490
 491 static inline size_t do_pdu_unpack(void *dst, struct iovec *sg, int sg_count,
 492                         size_t offset, size_t size)
 493 {
 494     return pdu_packunpack(dst, sg, sg_count, offset, size, 0);
 495 }
 496
 497 #endif