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