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_TVERSION = 100,
  17     P9_RVERSION,
  18     P9_TAUTH = 102,
  19     P9_RAUTH,
  20     P9_TATTACH = 104,
  21     P9_RATTACH,
  22     P9_TERROR = 106,
  23     P9_RERROR,
  24     P9_TFLUSH = 108,
  25     P9_RFLUSH,
  26     P9_TWALK = 110,
  27     P9_RWALK,
  28     P9_TOPEN = 112,
  29     P9_ROPEN,
  30     P9_TCREATE = 114,
  31     P9_RCREATE,
  32     P9_TREAD = 116,
  33     P9_RREAD,
  34     P9_TWRITE = 118,
  35     P9_RWRITE,
  36     P9_TCLUNK = 120,
  37     P9_RCLUNK,
  38     P9_TREMOVE = 122,
  39     P9_RREMOVE,
  40     P9_TSTAT = 124,
  41     P9_RSTAT,
  42     P9_TWSTAT = 126,
  43     P9_RWSTAT,
  44 };
  45
  46
  47 /* qid.types */
  48 enum {
  49     P9_QTDIR = 0x80,
  50     P9_QTAPPEND = 0x40,
  51     P9_QTEXCL = 0x20,
  52     P9_QTMOUNT = 0x10,
  53     P9_QTAUTH = 0x08,
  54     P9_QTTMP = 0x04,
  55     P9_QTSYMLINK = 0x02,
  56     P9_QTLINK = 0x01,
  57     P9_QTFILE = 0x00,
  58 };
  59
  60 #define P9_NOTAG    (u16)(~0)
  61 #define P9_NOFID    (u32)(~0)
  62 #define P9_MAXWELEM 16
  63
  64 typedef struct V9fsPDU V9fsPDU;
  65
  66 struct V9fsPDU
  67 {
  68     uint32_t size;
  69     uint16_t tag;
  70     uint8_t id;
  71     VirtQueueElement elem;
  72     QLIST_ENTRY(V9fsPDU) next;
  73 };
  74
  75
  76 /* FIXME
  77  * 1) change user needs to set groups and stuff
  78  */
  79
  80 /* from Linux's linux/virtio_9p.h */
  81
  82 /* The ID for virtio console */
  83 #define VIRTIO_ID_9P    9
  84 #define MAX_REQ         128
  85 #define MAX_TAG_LEN     32
  86
  87 #define BUG_ON(cond) assert(!(cond))
  88
  89 typedef struct V9fsFidState V9fsFidState;
  90
  91 typedef struct V9fsString
  92 {
  93     int16_t size;
  94     char *data;
  95 } V9fsString;
  96
  97 typedef struct V9fsQID
  98 {
  99     int8_t type;
 100     int32_t version;
 101     int64_t path;
 102 } V9fsQID;
 103
 104 typedef struct V9fsStat
 105 {
 106     int16_t size;
 107     int16_t type;
 108     int32_t dev;
 109     V9fsQID qid;
 110     int32_t mode;
 111     int32_t atime;
 112     int32_t mtime;
 113     int64_t length;
 114     V9fsString name;
 115     V9fsString uid;
 116     V9fsString gid;
 117     V9fsString muid;
 118     /* 9p2000.u */
 119     V9fsString extension;
 120    int32_t n_uid;
 121     int32_t n_gid;
 122     int32_t n_muid;
 123 } V9fsStat;
 124
 125 struct V9fsFidState
 126 {
 127     int32_t fid;
 128     V9fsString path;
 129     int fd;
 130     DIR *dir;
 131     uid_t uid;
 132     V9fsFidState *next;
 133 };
 134
 135 typedef struct V9fsState
 136 {
 137     VirtIODevice vdev;
 138     VirtQueue *vq;
 139     V9fsPDU pdus[MAX_REQ];
 140     QLIST_HEAD(, V9fsPDU) free_list;
 141     V9fsFidState *fid_list;
 142     FileOperations *ops;
 143     FsContext ctx;
 144     uint16_t tag_len;
 145     uint8_t *tag;
 146     size_t config_size;
 147 } V9fsState;
 148
 149 typedef struct V9fsCreateState {
 150     V9fsPDU *pdu;
 151     size_t offset;
 152     V9fsFidState *fidp;
 153     V9fsQID qid;
 154     int32_t perm;
 155     int8_t mode;
 156     struct stat stbuf;
 157     V9fsString name;
 158     V9fsString extension;
 159     V9fsString fullname;
 160 } V9fsCreateState;
 161
 162 typedef struct V9fsStatState {
 163     V9fsPDU *pdu;
 164     size_t offset;
 165     V9fsStat v9stat;
 166     V9fsFidState *fidp;
 167     struct stat stbuf;
 168 } V9fsStatState;
 169
 170 typedef struct V9fsWalkState {
 171     V9fsPDU *pdu;
 172     size_t offset;
 173     int16_t nwnames;
 174     int name_idx;
 175     V9fsQID *qids;
 176     V9fsFidState *fidp;
 177     V9fsFidState *newfidp;
 178     V9fsString path;
 179     V9fsString *wnames;
 180     struct stat stbuf;
 181 } V9fsWalkState;
 182
 183 typedef struct V9fsOpenState {
 184     V9fsPDU *pdu;
 185     size_t offset;
 186     int8_t mode;
 187     V9fsFidState *fidp;
 188     V9fsQID qid;
 189     struct stat stbuf;
 190 } V9fsOpenState;
 191
 192 typedef struct V9fsReadState {
 193     V9fsPDU *pdu;
 194     size_t offset;
 195     int32_t count;
 196     int32_t total;
 197     int64_t off;
 198     V9fsFidState *fidp;
 199     struct iovec iov[128]; /* FIXME: bad, bad, bad */
 200     struct iovec *sg;
 201     off_t dir_pos;
 202     struct dirent *dent;
 203     struct stat stbuf;
 204     V9fsString name;
 205     V9fsStat v9stat;
 206     int32_t len;
 207     int32_t cnt;
 208     int32_t max_count;
 209 } V9fsReadState;
 210
 211 typedef struct V9fsWriteState {
 212     V9fsPDU *pdu;
 213     size_t offset;
 214     int32_t len;
 215     int32_t count;
 216     int32_t total;
 217     int64_t off;
 218     V9fsFidState *fidp;
 219     struct iovec iov[128]; /* FIXME: bad, bad, bad */
 220     struct iovec *sg;
 221     int cnt;
 222 } V9fsWriteState;
 223
 224 typedef struct V9fsRemoveState {
 225     V9fsPDU *pdu;
 226     size_t offset;
 227     V9fsFidState *fidp;
 228 } V9fsRemoveState;
 229
 230 typedef struct V9fsWstatState
 231 {
 232     V9fsPDU *pdu;
 233     size_t offset;
 234     int16_t unused;
 235     V9fsStat v9stat;
 236     V9fsFidState *fidp;
 237     struct stat stbuf;
 238     V9fsString nname;
 239 } V9fsWstatState;
 240
 241 struct virtio_9p_config
 242 {
 243     /* number of characters in tag */
 244     uint16_t tag_len;
 245     /* Variable size tag name */
 246     uint8_t tag[0];
 247 } __attribute__((packed));
 248
 249 extern size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count,
 250                             size_t offset, size_t size, int pack);
 251
 252 static inline size_t do_pdu_unpack(void *dst, struct iovec *sg, int sg_count,
 253                         size_t offset, size_t size)
 254 {
 255     return pdu_packunpack(dst, sg, sg_count, offset, size, 0);
 256 }
 257
 258 #endif