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