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