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#ifndef _QEMU_VIRTIO_9P_H

#define _QEMU_VIRTIO_9P_H

#include <sys/types.h>

#include <dirent.h>

#include <sys/time.h>

#include <utime.h>

#include "hw/virtio.h"

#include "fsdev/file-op-9p.h"

/* The feature bitmap for virtio 9P */

/* The mount point is specified in a config variable */

#define VIRTIO_9P_MOUNT_TAG 0

enum {

    P9_TLERROR = 6,

    P9_RLERROR,

    P9_TSTATFS = 8,

    P9_RSTATFS,

    P9_TLOPEN = 12,

    P9_RLOPEN,

    P9_TLCREATE = 14,

    P9_RLCREATE,

    P9_TSYMLINK = 16,

    P9_RSYMLINK,

    P9_TMKNOD = 18,

    P9_RMKNOD,

    P9_TRENAME = 20,

    P9_RRENAME,

    P9_TREADLINK = 22,

    P9_RREADLINK,

    P9_TGETATTR = 24,

    P9_RGETATTR,

    P9_TSETATTR = 26,

    P9_RSETATTR,

    P9_TXATTRWALK = 30,

    P9_RXATTRWALK,

    P9_TXATTRCREATE = 32,

    P9_RXATTRCREATE,

    P9_TREADDIR = 40,

    P9_RREADDIR,

    P9_TFSYNC = 50,

    P9_RFSYNC,

    P9_TLOCK = 52,

    P9_RLOCK,

    P9_TGETLOCK = 54,

    P9_RGETLOCK,

    P9_TLINK = 70,

    P9_RLINK,

    P9_TMKDIR = 72,

    P9_RMKDIR,

    P9_TVERSION = 100,

    P9_RVERSION,

    P9_TAUTH = 102,

    P9_RAUTH,

    P9_TATTACH = 104,

    P9_RATTACH,

    P9_TERROR = 106,

    P9_RERROR,

    P9_TFLUSH = 108,

    P9_RFLUSH,

    P9_TWALK = 110,

    P9_RWALK,

    P9_TOPEN = 112,

    P9_ROPEN,

    P9_TCREATE = 114,

    P9_RCREATE,

    P9_TREAD = 116,

    P9_RREAD,

    P9_TWRITE = 118,

    P9_RWRITE,

    P9_TCLUNK = 120,

    P9_RCLUNK,

    P9_TREMOVE = 122,

    P9_RREMOVE,

    P9_TSTAT = 124,

    P9_RSTAT,

    P9_TWSTAT = 126,

    P9_RWSTAT,

};

/* qid.types */

enum {

    P9_QTDIR = 0x80,

    P9_QTAPPEND = 0x40,

    P9_QTEXCL = 0x20,

    P9_QTMOUNT = 0x10,

    P9_QTAUTH = 0x08,

    P9_QTTMP = 0x04,

    P9_QTSYMLINK = 0x02,

    P9_QTLINK = 0x01,

    P9_QTFILE = 0x00,

};

enum p9_proto_version {

    V9FS_PROTO_2000U = 0x01,

    V9FS_PROTO_2000L = 0x02,

};

#define P9_NOTAG    (u16)(~0)

#define P9_NOFID    (u32)(~0)

#define P9_MAXWELEM 16

static inline const char *rpath(FsContext *ctx, const char *path, char *buffer)

{

    snprintf(buffer, PATH_MAX, "%s/%s", ctx->fs_root, path);

    return buffer;

}

/*

 * ample room for Twrite/Rread header

 * size[4] Tread/Twrite tag[2] fid[4] offset[8] count[4]

 */

#define P9_IOHDRSZ 24

typedef struct V9fsPDU V9fsPDU;

struct V9fsState;

struct V9fsPDU

{

    uint32_t size;

    uint16_t tag;

    uint8_t id;

    VirtQueueElement elem;

    struct V9fsState *s;

    QLIST_ENTRY(V9fsPDU) next;

};

/* FIXME

 * 1) change user needs to set groups and stuff

 */

/* from Linux's linux/virtio_9p.h */

/* The ID for virtio console */

#define VIRTIO_ID_9P    9

#define MAX_REQ         128

#define MAX_TAG_LEN     32

#define BUG_ON(cond) assert(!(cond))

typedef struct V9fsFidState V9fsFidState;

typedef struct V9fsString

{

    int16_t size;

    char *data;

} V9fsString;

typedef struct V9fsQID

{

    int8_t type;

    int32_t version;

    int64_t path;

} V9fsQID;

typedef struct V9fsStat

{

    int16_t size;

    int16_t type;

    int32_t dev;

    V9fsQID qid;

    int32_t mode;

    int32_t atime;

    int32_t mtime;

    int64_t length;

    V9fsString name;

    V9fsString uid;

    V9fsString gid;

    V9fsString muid;

    /* 9p2000.u */

    V9fsString extension;

   int32_t n_uid;

    int32_t n_gid;

    int32_t n_muid;

} V9fsStat;

enum {

    P9_FID_NONE = 0,

    P9_FID_FILE,

    P9_FID_DIR,

    P9_FID_XATTR,

};

typedef struct V9fsXattr

{

    int64_t copied_len;

    int64_t len;

    void *value;

    V9fsString name;

    int flags;

} V9fsXattr;

struct V9fsFidState

{

    int fid_type;

    int32_t fid;

    V9fsString path;

    union {

        int fd;

        DIR *dir;

        V9fsXattr xattr;

    } fs;

    uid_t uid;

    V9fsFidState *next;

};

typedef struct V9fsState

{

    VirtIODevice vdev;

    VirtQueue *vq;

    V9fsPDU pdus[MAX_REQ];

    QLIST_HEAD(, V9fsPDU) free_list;

    V9fsFidState *fid_list;

    FileOperations *ops;

    FsContext ctx;

    uint16_t tag_len;

    uint8_t *tag;

    size_t config_size;

    enum p9_proto_version proto_version;

    int32_t msize;

} V9fsState;

typedef struct V9fsCreateState {

    V9fsPDU *pdu;

    size_t offset;

    V9fsFidState *fidp;

    V9fsQID qid;

    int32_t perm;

    int8_t mode;

    struct stat stbuf;

    V9fsString name;

    V9fsString extension;

    V9fsString fullname;

    int iounit;

} V9fsCreateState;

typedef struct V9fsLcreateState {

    V9fsPDU *pdu;

    size_t offset;

    V9fsFidState *fidp;

    V9fsQID qid;

    int32_t iounit;

    struct stat stbuf;

    V9fsString name;

    V9fsString fullname;

} V9fsLcreateState;

typedef struct V9fsStatState {

    V9fsPDU *pdu;

    size_t offset;

    V9fsStat v9stat;

    V9fsFidState *fidp;

    struct stat stbuf;

} V9fsStatState;

typedef struct V9fsStatDotl {

    uint64_t st_result_mask;

    V9fsQID qid;

    uint32_t st_mode;

    uint32_t st_uid;

    uint32_t st_gid;

    uint64_t st_nlink;

    uint64_t st_rdev;

    uint64_t st_size;

    uint64_t st_blksize;

    uint64_t st_blocks;

    uint64_t st_atime_sec;

    uint64_t st_atime_nsec;

    uint64_t st_mtime_sec;

    uint64_t st_mtime_nsec;

    uint64_t st_ctime_sec;

    uint64_t st_ctime_nsec;

    uint64_t st_btime_sec;

    uint64_t st_btime_nsec;

    uint64_t st_gen;

    uint64_t st_data_version;

} V9fsStatDotl;

typedef struct V9fsWalkState {

    V9fsPDU *pdu;

    size_t offset;

    uint16_t nwnames;

    int name_idx;

    V9fsQID *qids;

    V9fsFidState *fidp;

    V9fsFidState *newfidp;

    V9fsString path;

    V9fsString *wnames;

    struct stat stbuf;

} V9fsWalkState;

typedef struct V9fsOpenState {

    V9fsPDU *pdu;

    size_t offset;

    int32_t mode;

    V9fsFidState *fidp;

    V9fsQID qid;

    struct stat stbuf;

    int iounit;

} V9fsOpenState;

typedef struct V9fsReadState {

    V9fsPDU *pdu;

    size_t offset;

    int32_t count;

    int32_t total;

    int64_t off;

    V9fsFidState *fidp;

    struct iovec iov[128]; /* FIXME: bad, bad, bad */

    struct iovec *sg;

    off_t dir_pos;

    struct dirent *dent;

    struct stat stbuf;

    V9fsString name;

    V9fsStat v9stat;

    int32_t len;

    int32_t cnt;

    int32_t max_count;

} V9fsReadState;

typedef struct V9fsWriteState {

    V9fsPDU *pdu;

    size_t offset;

    int32_t len;

    int32_t count;

    int32_t total;

    int64_t off;

    V9fsFidState *fidp;

    struct iovec iov[128]; /* FIXME: bad, bad, bad */

    struct iovec *sg;

    int cnt;

} V9fsWriteState;

typedef struct V9fsRemoveState {

    V9fsPDU *pdu;

    size_t offset;

    V9fsFidState *fidp;

} V9fsRemoveState;

typedef struct V9fsWstatState

{

    V9fsPDU *pdu;

    size_t offset;

    int16_t unused;

    V9fsStat v9stat;

    V9fsFidState *fidp;

    struct stat stbuf;

} V9fsWstatState;

typedef struct V9fsSymlinkState

{

    V9fsPDU *pdu;

    size_t offset;

    V9fsString name;

    V9fsString symname;

    V9fsString fullname;

    V9fsFidState *dfidp;

    V9fsQID qid;

    struct stat stbuf;

} V9fsSymlinkState;

typedef struct V9fsIattr

{

    int32_t valid;

    int32_t mode;

    int32_t uid;

    int32_t gid;

    int64_t size;

    int64_t atime_sec;

    int64_t atime_nsec;

    int64_t mtime_sec;

    int64_t mtime_nsec;

} V9fsIattr;

struct virtio_9p_config

{

    /* number of characters in tag */

    uint16_t tag_len;

    /* Variable size tag name */

    uint8_t tag[0];

} __attribute__((packed));

typedef struct V9fsMkState {

    V9fsPDU *pdu;

    size_t offset;

    V9fsQID qid;

    struct stat stbuf;

    V9fsString name;

    V9fsString fullname;

} V9fsMkState;

typedef struct V9fsRenameState {

    V9fsPDU *pdu;

    V9fsFidState *fidp;

    size_t offset;

    int32_t newdirfid;

    V9fsString name;

} V9fsRenameState;

typedef struct V9fsXattrState

{

    V9fsPDU *pdu;

    size_t offset;

    V9fsFidState *file_fidp;

    V9fsFidState *xattr_fidp;

    V9fsString name;

    int64_t size;

    int flags;

    void *value;

} V9fsXattrState;

#define P9_LOCK_SUCCESS 0

#define P9_LOCK_BLOCKED 1

#define P9_LOCK_ERROR 2

#define P9_LOCK_GRACE 3

#define P9_LOCK_FLAGS_BLOCK 1

#define P9_LOCK_FLAGS_RECLAIM 2

typedef struct V9fsFlock

{

    uint8_t type;

    uint32_t flags;

    uint64_t start; /* absolute offset */

    uint64_t length;

    uint32_t proc_id;

    V9fsString client_id;

} V9fsFlock;

typedef struct V9fsLockState

{

    V9fsPDU *pdu;

    size_t offset;

    int8_t status;

    struct stat stbuf;

    V9fsFidState *fidp;

    V9fsFlock *flock;

} V9fsLockState;

typedef struct V9fsGetlock

{

    uint8_t type;

    uint64_t start; /* absolute offset */

    uint64_t length;

    uint32_t proc_id;

    V9fsString client_id;

} V9fsGetlock;

typedef struct V9fsGetlockState

{

    V9fsPDU *pdu;

    size_t offset;

    struct stat stbuf;

    V9fsFidState *fidp;

    V9fsGetlock *glock;

} V9fsGetlockState;

size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count,

                      size_t offset, size_t size, int pack);

static inline size_t do_pdu_unpack(void *dst, struct iovec *sg, int sg_count,

                        size_t offset, size_t size)

{

    return pdu_packunpack(dst, sg, sg_count, offset, size, 0);

}

extern void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq);

#endif