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