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#ifndef _QEMU_VIRTIO_9P_H
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#define _QEMU_VIRTIO_9P_H
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#include <sys/types.h>
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#include <dirent.h>
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#include <sys/time.h>
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#include <utime.h>
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#include "file-op-9p.h"
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/* The feature bitmap for virtio 9P */
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/* The mount point is specified in a config variable */
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#define VIRTIO_9P_MOUNT_TAG 0
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enum {
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    P9_TLERROR = 6,
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    P9_RLERROR,
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    P9_TSTATFS = 8,
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    P9_RSTATFS,
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    P9_TLOPEN = 12,
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    P9_RLOPEN,
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    P9_TLCREATE = 14,
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    P9_RLCREATE,
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    P9_TSYMLINK = 16,
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    P9_RSYMLINK,
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    P9_TMKNOD = 18,
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    P9_RMKNOD,
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    P9_TRENAME = 20,
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    P9_RRENAME,
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    P9_TGETATTR = 24,
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    P9_RGETATTR,
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    P9_TSETATTR = 26,
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    P9_RSETATTR,
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    P9_TXATTRWALK = 30,
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    P9_RXATTRWALK,
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    P9_TXATTRCREATE = 32,
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    P9_RXATTRCREATE,
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    P9_TREADDIR = 40,
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    P9_RREADDIR,
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    P9_TLOCK = 52,
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    P9_RLOCK,
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    P9_TGETLOCK = 54,
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    P9_RGETLOCK,
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    P9_TLINK = 70,
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    P9_RLINK,
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    P9_TMKDIR = 72,
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    P9_RMKDIR,
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    P9_TVERSION = 100,
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    P9_RVERSION,
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    P9_TAUTH = 102,
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    P9_RAUTH,
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    P9_TATTACH = 104,
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    P9_RATTACH,
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    P9_TERROR = 106,
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    P9_RERROR,
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    P9_TFLUSH = 108,
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    P9_RFLUSH,
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    P9_TWALK = 110,
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    P9_RWALK,
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    P9_TOPEN = 112,
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    P9_ROPEN,
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    P9_TCREATE = 114,
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    P9_RCREATE,
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    P9_TREAD = 116,
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    P9_RREAD,
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    P9_TWRITE = 118,
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    P9_RWRITE,
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    P9_TCLUNK = 120,
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    P9_RCLUNK,
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    P9_TREMOVE = 122,
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    P9_RREMOVE,
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    P9_TSTAT = 124,
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    P9_RSTAT,
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    P9_TWSTAT = 126,
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    P9_RWSTAT,
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};
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/* qid.types */
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enum {
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    P9_QTDIR = 0x80,
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    P9_QTAPPEND = 0x40,
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    P9_QTEXCL = 0x20,
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    P9_QTMOUNT = 0x10,
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    P9_QTAUTH = 0x08,
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    P9_QTTMP = 0x04,
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    P9_QTSYMLINK = 0x02,
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    P9_QTLINK = 0x01,
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    P9_QTFILE = 0x00,
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};
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enum p9_proto_version {
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    V9FS_PROTO_2000U = 0x01,
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    V9FS_PROTO_2000L = 0x02,
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};
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#define P9_NOTAG    (u16)(~0)
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#define P9_NOFID    (u32)(~0)
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#define P9_MAXWELEM 16
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/*
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 * ample room for Twrite/Rread header
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 * size[4] Tread/Twrite tag[2] fid[4] offset[8] count[4]
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 */
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#define P9_IOHDRSZ 24
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typedef struct V9fsPDU V9fsPDU;
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struct V9fsPDU
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{
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    uint32_t size;
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    uint16_t tag;
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    uint8_t id;
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    VirtQueueElement elem;
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    QLIST_ENTRY(V9fsPDU) next;
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};
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/* FIXME
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 * 1) change user needs to set groups and stuff
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 */
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/* from Linux's linux/virtio_9p.h */
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/* The ID for virtio console */
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#define VIRTIO_ID_9P    9
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#define MAX_REQ         128
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#define MAX_TAG_LEN     32
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#define BUG_ON(cond) assert(!(cond))
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typedef struct V9fsFidState V9fsFidState;
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typedef struct V9fsString
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{
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    int16_t size;
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    char *data;
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} V9fsString;
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typedef struct V9fsQID
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{
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    int8_t type;
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    int32_t version;
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    int64_t path;
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} V9fsQID;
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typedef struct V9fsStat
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{
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    int16_t size;
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    int16_t type;
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    int32_t dev;
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    V9fsQID qid;
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    int32_t mode;
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    int32_t atime;
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    int32_t mtime;
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    int64_t length;
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    V9fsString name;
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    V9fsString uid;
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    V9fsString gid;
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    V9fsString muid;
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    /* 9p2000.u */
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    V9fsString extension;
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   int32_t n_uid;
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    int32_t n_gid;
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    int32_t n_muid;
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} V9fsStat;
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enum {
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    P9_FID_NONE = 0,
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    P9_FID_FILE,
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    P9_FID_DIR,
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    P9_FID_XATTR,
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};
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typedef struct V9fsXattr
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{
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    int64_t copied_len;
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    int64_t len;
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    void *value;
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    V9fsString name;
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    int flags;
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} V9fsXattr;
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struct V9fsFidState
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{
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    int fid_type;
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    int32_t fid;
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    V9fsString path;
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    union {
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        int fd;
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        DIR *dir;
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        V9fsXattr xattr;
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    } fs;
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    uid_t uid;
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    V9fsFidState *next;
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};
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typedef struct V9fsState
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{
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    VirtIODevice vdev;
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    VirtQueue *vq;
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    V9fsPDU pdus[MAX_REQ];
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    QLIST_HEAD(, V9fsPDU) free_list;
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    V9fsFidState *fid_list;
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    FileOperations *ops;
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    FsContext ctx;
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    uint16_t tag_len;
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    uint8_t *tag;
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    size_t config_size;
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    enum p9_proto_version proto_version;
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    int32_t msize;
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} V9fsState;
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typedef struct V9fsCreateState {
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    V9fsPDU *pdu;
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    size_t offset;
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    V9fsFidState *fidp;
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    V9fsQID qid;
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    int32_t perm;
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    int8_t mode;
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    struct stat stbuf;
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    V9fsString name;
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    V9fsString extension;
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    V9fsString fullname;
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    int iounit;
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} V9fsCreateState;
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typedef struct V9fsLcreateState {
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    V9fsPDU *pdu;
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    size_t offset;
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    V9fsFidState *fidp;
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    V9fsQID qid;
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    int32_t iounit;
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    struct stat stbuf;
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    V9fsString name;
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    V9fsString fullname;
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} V9fsLcreateState;
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typedef struct V9fsStatState {
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    V9fsPDU *pdu;
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    size_t offset;
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    V9fsStat v9stat;
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    V9fsFidState *fidp;
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    struct stat stbuf;
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} V9fsStatState;
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typedef struct V9fsStatDotl {
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    uint64_t st_result_mask;
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    V9fsQID qid;
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    uint32_t st_mode;
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    uint32_t st_uid;
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    uint32_t st_gid;
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    uint64_t st_nlink;
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    uint64_t st_rdev;
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    uint64_t st_size;
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    uint64_t st_blksize;
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    uint64_t st_blocks;
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    uint64_t st_atime_sec;
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    uint64_t st_atime_nsec;
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    uint64_t st_mtime_sec;
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    uint64_t st_mtime_nsec;
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    uint64_t st_ctime_sec;
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    uint64_t st_ctime_nsec;
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    uint64_t st_btime_sec;
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    uint64_t st_btime_nsec;
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    uint64_t st_gen;
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    uint64_t st_data_version;
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} V9fsStatDotl;
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typedef struct V9fsStatStateDotl {
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    V9fsPDU *pdu;
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    size_t offset;
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    V9fsStatDotl v9stat_dotl;
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    struct stat stbuf;
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} V9fsStatStateDotl;
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typedef struct V9fsWalkState {
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    V9fsPDU *pdu;
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    size_t offset;
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    int16_t nwnames;
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    int name_idx;
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    V9fsQID *qids;
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    V9fsFidState *fidp;
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    V9fsFidState *newfidp;
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    V9fsString path;
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    V9fsString *wnames;
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    struct stat stbuf;
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} V9fsWalkState;
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typedef struct V9fsOpenState {
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    V9fsPDU *pdu;
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    size_t offset;
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    int32_t mode;
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    V9fsFidState *fidp;
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    V9fsQID qid;
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    struct stat stbuf;
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    int iounit;
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} V9fsOpenState;
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typedef struct V9fsReadState {
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    V9fsPDU *pdu;
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    size_t offset;
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    int32_t count;
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    int32_t total;
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    int64_t off;
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    V9fsFidState *fidp;
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    struct iovec iov[128]; /* FIXME: bad, bad, bad */
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    struct iovec *sg;
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    off_t dir_pos;
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    struct dirent *dent;
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    struct stat stbuf;
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    V9fsString name;
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    V9fsStat v9stat;
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    int32_t len;
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    int32_t cnt;
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    int32_t max_count;
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} V9fsReadState;
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typedef struct V9fsWriteState {
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    V9fsPDU *pdu;
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    size_t offset;
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    int32_t len;
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    int32_t count;
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    int32_t total;
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    int64_t off;
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    V9fsFidState *fidp;
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    struct iovec iov[128]; /* FIXME: bad, bad, bad */
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    struct iovec *sg;
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    int cnt;
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} V9fsWriteState;
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typedef struct V9fsRemoveState {
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    V9fsPDU *pdu;
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    size_t offset;
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    V9fsFidState *fidp;
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} V9fsRemoveState;
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typedef struct V9fsWstatState
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{
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    V9fsPDU *pdu;
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    size_t offset;
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    int16_t unused;
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    V9fsStat v9stat;
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    V9fsFidState *fidp;
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    struct stat stbuf;
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} V9fsWstatState;
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typedef struct V9fsSymlinkState
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{
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    V9fsPDU *pdu;
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    size_t offset;
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    V9fsString name;
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    V9fsString symname;
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    V9fsString fullname;
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    V9fsFidState *dfidp;
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    V9fsQID qid;
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    struct stat stbuf;
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} V9fsSymlinkState;
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typedef struct V9fsIattr
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{
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    int32_t valid;
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    int32_t mode;
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    int32_t uid;
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    int32_t gid;
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    int64_t size;
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    int64_t atime_sec;
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    int64_t atime_nsec;
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    int64_t mtime_sec;
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    int64_t mtime_nsec;
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} V9fsIattr;
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typedef struct V9fsSetattrState
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{
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    V9fsPDU *pdu;
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    size_t offset;
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    V9fsIattr v9iattr;
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    V9fsFidState *fidp;
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} V9fsSetattrState;
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struct virtio_9p_config
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{
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    /* number of characters in tag */
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    uint16_t tag_len;
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    /* Variable size tag name */
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    uint8_t tag[0];
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} __attribute__((packed));
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typedef struct V9fsStatfs
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{
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    uint32_t f_type;
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    uint32_t f_bsize;
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    uint64_t f_blocks;
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    uint64_t f_bfree;
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    uint64_t f_bavail;
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    uint64_t f_files;
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    uint64_t f_ffree;
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    uint64_t fsid_val;
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    uint32_t f_namelen;
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} V9fsStatfs;
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typedef struct V9fsStatfsState {
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    V9fsPDU *pdu;
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    size_t offset;
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    int32_t fid;
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    V9fsStatfs v9statfs;
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    V9fsFidState *fidp;
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    struct statfs stbuf;
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} V9fsStatfsState;
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typedef struct V9fsMkState {
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    V9fsPDU *pdu;
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    size_t offset;
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    V9fsQID qid;
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    struct stat stbuf;
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    V9fsString name;
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    V9fsString fullname;
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} V9fsMkState;
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typedef struct V9fsRenameState {
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    V9fsPDU *pdu;
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    V9fsFidState *fidp;
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    size_t offset;
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    int32_t newdirfid;
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    V9fsString name;
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} V9fsRenameState;
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typedef struct V9fsXattrState
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{
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    V9fsPDU *pdu;
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    size_t offset;
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    V9fsFidState *file_fidp;
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    V9fsFidState *xattr_fidp;
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    V9fsString name;
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    int64_t size;
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    int flags;
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    void *value;
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} V9fsXattrState;
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#define P9_LOCK_SUCCESS 0
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#define P9_LOCK_BLOCKED 1
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#define P9_LOCK_ERROR 2
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#define P9_LOCK_GRACE 3
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#define P9_LOCK_FLAGS_BLOCK 1
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#define P9_LOCK_FLAGS_RECLAIM 2
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typedef struct V9fsFlock
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{
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    uint8_t type;
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    uint32_t flags;
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    uint64_t start; /* absolute offset */
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    uint64_t length;
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    uint32_t proc_id;
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    V9fsString client_id;
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} V9fsFlock;
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typedef struct V9fsLockState
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{
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    V9fsPDU *pdu;
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    size_t offset;
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    int8_t status;
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    struct stat stbuf;
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    V9fsFidState *fidp;
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    V9fsFlock *flock;
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} V9fsLockState;
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typedef struct V9fsGetlock
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{
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    uint8_t type;
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    uint64_t start; /* absolute offset */
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    uint64_t length;
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    uint32_t proc_id;
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    V9fsString client_id;
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} V9fsGetlock;
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typedef struct V9fsGetlockState
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{
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    V9fsPDU *pdu;
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    size_t offset;
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    struct stat stbuf;
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    V9fsFidState *fidp;
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    V9fsGetlock *glock;
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} V9fsGetlockState;
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extern size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count,
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                            size_t offset, size_t size, int pack);
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static inline size_t do_pdu_unpack(void *dst, struct iovec *sg, int sg_count,
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                        size_t offset, size_t size)
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{
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    return pdu_packunpack(dst, sg, sg_count, offset, size, 0);
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}
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#endif