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