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