Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

5 files changed, 761 insertions, 0 deletions

diff --git a/linux-user/generic/fcntl.h b/linux-user/generic/fcntl.h
new file mode 100644
index 000000000..4568d1f42
--- /dev/null
+++ b/linux-user/generic/fcntl.h
@@ -0,0 +1,152 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation, or (at your option) any
+ * later version. See the COPYING file in the top-level directory.
+ */
+
+#ifndef GENERIC_FCNTL_H
+#define GENERIC_FCNTL_H
+
+/* <asm-generic/fcntl.h> values follow.  */
+#define TARGET_O_ACCMODE          0003
+#define TARGET_O_RDONLY             00
+#define TARGET_O_WRONLY             01
+#define TARGET_O_RDWR               02
+#ifndef TARGET_O_CREAT
+#define TARGET_O_CREAT            0100 /* not fcntl */
+#endif
+#ifndef TARGET_O_EXCL
+#define TARGET_O_EXCL             0200 /* not fcntl */
+#endif
+#ifndef TARGET_O_NOCTTY
+#define TARGET_O_NOCTTY           0400 /* not fcntl */
+#endif
+#ifndef TARGET_O_TRUNC
+#define TARGET_O_TRUNC           01000 /* not fcntl */
+#endif
+#ifndef TARGET_O_APPEND
+#define TARGET_O_APPEND          02000
+#endif
+#ifndef TARGET_O_NONBLOCK
+#define TARGET_O_NONBLOCK        04000
+#endif
+#ifndef TARGET_O_DSYNC
+#define TARGET_O_DSYNC          010000
+#endif
+#ifndef TARGET_FASYNC
+#define TARGET_FASYNC           020000 /* fcntl, for BSD compatibility */
+#endif
+#ifndef TARGET_O_DIRECT
+#define TARGET_O_DIRECT         040000 /* direct disk access hint */
+#endif
+#ifndef TARGET_O_LARGEFILE
+#define TARGET_O_LARGEFILE     0100000
+#endif
+#ifndef TARGET_O_DIRECTORY
+#define TARGET_O_DIRECTORY     0200000 /* must be a directory */
+#endif
+#ifndef TARGET_O_NOFOLLOW
+#define TARGET_O_NOFOLLOW      0400000 /* don't follow links */
+#endif
+#ifndef TARGET_O_NOATIME
+#define TARGET_O_NOATIME      01000000
+#endif
+#ifndef TARGET_O_CLOEXEC
+#define TARGET_O_CLOEXEC      02000000
+#endif
+#ifndef TARGET___O_SYNC
+#define TARGET___O_SYNC       04000000
+#endif
+#ifndef TARGET_O_PATH
+#define TARGET_O_PATH        010000000
+#endif
+#ifndef TARGET___O_TMPFILE
+#define TARGET___O_TMPFILE   020000000
+#endif
+#ifndef TARGET_O_TMPFILE
+#define TARGET_O_TMPFILE     (TARGET___O_TMPFILE | TARGET_O_DIRECTORY)
+#endif
+#ifndef TARGET_O_NDELAY
+#define TARGET_O_NDELAY  TARGET_O_NONBLOCK
+#endif
+#ifndef TARGET_O_SYNC
+#define TARGET_O_SYNC    (TARGET___O_SYNC | TARGET_O_DSYNC)
+#endif
+
+#define TARGET_F_DUPFD         0       /* dup */
+#define TARGET_F_GETFD         1       /* get close_on_exec */
+#define TARGET_F_SETFD         2       /* set/clear close_on_exec */
+#define TARGET_F_GETFL         3       /* get file->f_flags */
+#define TARGET_F_SETFL         4       /* set file->f_flags */
+#ifndef TARGET_F_GETLK
+#define TARGET_F_GETLK         5
+#define TARGET_F_SETLK         6
+#define TARGET_F_SETLKW        7
+#endif
+#ifndef TARGET_F_SETOWN
+#define TARGET_F_SETOWN        8       /*  for sockets. */
+#define TARGET_F_GETOWN        9       /*  for sockets. */
+#endif
+#ifndef TARGET_F_SETSIG
+#define TARGET_F_SETSIG        10      /*  for sockets. */
+#define TARGET_F_GETSIG        11      /*  for sockets. */
+#endif
+
+#ifndef TARGET_F_GETLK64
+#define TARGET_F_GETLK64       12      /*  using 'struct flock64' */
+#define TARGET_F_SETLK64       13
+#define TARGET_F_SETLKW64      14
+#endif
+
+#define TARGET_F_OFD_GETLK     36
+#define TARGET_F_OFD_SETLK     37
+#define TARGET_F_OFD_SETLKW    38
+
+#ifndef TARGET_F_SETOWN_EX
+#define TARGET_F_SETOWN_EX     15
+#define TARGET_F_GETOWN_EX     16
+#endif
+
+struct target_f_owner_ex {
+        int type;       /* Owner type of ID.  */
+        int pid;        /* ID of owner.  */
+};
+
+#ifndef TARGET_F_RDLCK
+#define TARGET_F_RDLCK         0
+#define TARGET_F_WRLCK         1
+#define TARGET_F_UNLCK         2
+#endif
+
+#ifndef TARGET_HAVE_ARCH_STRUCT_FLOCK
+#ifndef TARGET_ARCH_FLOCK_PAD
+#define TARGET_ARCH_FLOCK_PAD
+#endif
+
+struct target_flock {
+    short l_type;
+    short l_whence;
+    abi_long l_start;
+    abi_long l_len;
+    int l_pid;
+    TARGET_ARCH_FLOCK_PAD
+};
+#endif
+
+#ifndef TARGET_HAVE_ARCH_STRUCT_FLOCK64
+#ifndef TARGET_ARCH_FLOCK64_PAD
+#define TARGET_ARCH_FLOCK64_PAD
+#endif
+
+struct target_flock64 {
+    abi_short l_type;
+    abi_short l_whence;
+    abi_llong l_start;
+    abi_llong l_len;
+    abi_int   l_pid;
+    TARGET_ARCH_FLOCK64_PAD
+};
+#endif
+
+#endif
diff --git a/linux-user/generic/signal.h b/linux-user/generic/signal.h
new file mode 100644
index 000000000..943bc1a1e
--- /dev/null
+++ b/linux-user/generic/signal.h
@@ -0,0 +1,63 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation, or (at your option) any
+ * later version. See the COPYING file in the top-level directory.
+ */
+
+#ifndef GENERIC_SIGNAL_H
+#define GENERIC_SIGNAL_H
+
+#define TARGET_SA_NOCLDSTOP     0x00000001
+#define TARGET_SA_NOCLDWAIT     0x00000002 /* not supported yet */
+#define TARGET_SA_SIGINFO       0x00000004
+#define TARGET_SA_ONSTACK       0x08000000
+#define TARGET_SA_RESTART       0x10000000
+#define TARGET_SA_NODEFER       0x40000000
+#define TARGET_SA_RESETHAND     0x80000000
+#define TARGET_SA_RESTORER      0x04000000
+
+#define TARGET_SIGHUP            1
+#define TARGET_SIGINT            2
+#define TARGET_SIGQUIT           3
+#define TARGET_SIGILL            4
+#define TARGET_SIGTRAP           5
+#define TARGET_SIGABRT           6
+#define TARGET_SIGIOT            6
+#define TARGET_SIGBUS            7
+#define TARGET_SIGFPE            8
+#define TARGET_SIGKILL           9
+#define TARGET_SIGUSR1          10
+#define TARGET_SIGSEGV          11
+#define TARGET_SIGUSR2          12
+#define TARGET_SIGPIPE          13
+#define TARGET_SIGALRM          14
+#define TARGET_SIGTERM          15
+#define TARGET_SIGSTKFLT        16
+#define TARGET_SIGCHLD          17
+#define TARGET_SIGCONT          18
+#define TARGET_SIGSTOP          19
+#define TARGET_SIGTSTP          20
+#define TARGET_SIGTTIN          21
+#define TARGET_SIGTTOU          22
+#define TARGET_SIGURG           23
+#define TARGET_SIGXCPU          24
+#define TARGET_SIGXFSZ          25
+#define TARGET_SIGVTALRM        26
+#define TARGET_SIGPROF          27
+#define TARGET_SIGWINCH         28
+#define TARGET_SIGIO            29
+#define TARGET_SIGPWR           30
+#define TARGET_SIGSYS           31
+#define TARGET_SIGRTMIN         32
+
+#define TARGET_SIG_BLOCK          0    /* for blocking signals */
+#define TARGET_SIG_UNBLOCK        1    /* for unblocking signals */
+#define TARGET_SIG_SETMASK        2    /* for setting the signal mask */
+
+/* bit-flags */
+#define TARGET_SS_AUTODISARM (1U << 31) /* disable sas during sighandling */
+/* mask for all SS_xxx flags */
+#define TARGET_SS_FLAG_BITS  TARGET_SS_AUTODISARM
+
+#endif
diff --git a/linux-user/generic/sockbits.h b/linux-user/generic/sockbits.h
new file mode 100644
index 000000000..b3b4a8e44
--- /dev/null
+++ b/linux-user/generic/sockbits.h
@@ -0,0 +1,61 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation, or (at your option) any
+ * later version. See the COPYING file in the top-level directory.
+ */
+
+#ifndef GENERIC_SOCKBITS_H
+#define GENERIC_SOCKBITS_H
+
+#define TARGET_SO_PASSSEC        34
+
+/* For setsockopt(2) */
+#define TARGET_SOL_SOCKET      1
+
+#define TARGET_SO_DEBUG        1
+#define TARGET_SO_REUSEADDR    2
+#define TARGET_SO_TYPE         3
+#define TARGET_SO_ERROR        4
+#define TARGET_SO_DONTROUTE    5
+#define TARGET_SO_BROADCAST    6
+#define TARGET_SO_SNDBUF       7
+#define TARGET_SO_RCVBUF       8
+#define TARGET_SO_SNDBUFFORCE  32
+#define TARGET_SO_RCVBUFFORCE  33
+#define TARGET_SO_KEEPALIVE    9
+#define TARGET_SO_OOBINLINE    10
+#define TARGET_SO_NO_CHECK     11
+#define TARGET_SO_PRIORITY     12
+#define TARGET_SO_LINGER       13
+#define TARGET_SO_BSDCOMPAT    14
+#define TARGET_SO_REUSEPORT    15
+#define TARGET_SO_PASSCRED     16
+#define TARGET_SO_PEERCRED     17
+#define TARGET_SO_RCVLOWAT     18
+#define TARGET_SO_SNDLOWAT     19
+#define TARGET_SO_RCVTIMEO     20
+#define TARGET_SO_SNDTIMEO     21
+
+/* Security levels - as per NRL IPv6 - don't actually do anything */
+#define TARGET_SO_SECURITY_AUTHENTICATION              22
+#define TARGET_SO_SECURITY_ENCRYPTION_TRANSPORT        23
+#define TARGET_SO_SECURITY_ENCRYPTION_NETWORK          24
+
+#define TARGET_SO_BINDTODEVICE 25
+
+/* Socket filtering */
+#define TARGET_SO_ATTACH_FILTER        26
+#define TARGET_SO_DETACH_FILTER        27
+
+#define TARGET_SO_PEERNAME             28
+#define TARGET_SO_TIMESTAMP            29
+#define TARGET_SCM_TIMESTAMP           TARGET_SO_TIMESTAMP
+
+#define TARGET_SO_ACCEPTCONN           30
+
+#define TARGET_SO_PEERSEC              31
+
+#define TARGET_SO_PROTOCOL             38
+#define TARGET_SO_DOMAIN               39
+#endif
diff --git a/linux-user/generic/target_errno_defs.h b/linux-user/generic/target_errno_defs.h
new file mode 100644
index 000000000..17d85e0b6
--- /dev/null
+++ b/linux-user/generic/target_errno_defs.h
@@ -0,0 +1,167 @@
+/*
+ * Target definitions of errnos. These may be overridden by an
+ * architecture specific header if needed.
+ *
+ * Taken from asm-generic/errno-base.h and asm-generic/errno.h
+ */
+
+#ifndef GENERIC_TARGET_ERRNO_DEFS_H
+#define GENERIC_TARGET_ERRNO_DEFS_H
+
+#define TARGET_EPERM            1      /* Operation not permitted */
+#define TARGET_ENOENT           2      /* No such file or directory */
+#define TARGET_ESRCH            3      /* No such process */
+#define TARGET_EINTR            4      /* Interrupted system call */
+#define TARGET_EIO              5      /* I/O error */
+#define TARGET_ENXIO            6      /* No such device or address */
+#define TARGET_E2BIG            7      /* Argument list too long */
+#define TARGET_ENOEXEC          8      /* TARGET_Exec format error */
+#define TARGET_EBADF            9      /* Bad file number */
+#define TARGET_ECHILD          10      /* No child processes */
+#define TARGET_EAGAIN          11      /* Try again */
+#define TARGET_ENOMEM          12      /* Out of memory */
+#define TARGET_EACCES          13      /* Permission denied */
+#define TARGET_EFAULT          14      /* Bad address */
+#define TARGET_ENOTBLK         15      /* Block device required */
+#define TARGET_EBUSY           16      /* Device or resource busy */
+#define TARGET_EEXIST          17      /* File exists */
+#define TARGET_EXDEV           18      /* Cross-device link */
+#define TARGET_ENODEV          19      /* No such device */
+#define TARGET_ENOTDIR         20      /* Not a directory */
+#define TARGET_EISDIR          21      /* Is a directory */
+#define TARGET_EINVAL          22      /* Invalid argument */
+#define TARGET_ENFILE          23      /* File table overflow */
+#define TARGET_EMFILE          24      /* Too many open files */
+#define TARGET_ENOTTY          25      /* Not a typewriter */
+#define TARGET_ETXTBSY         26      /* Text file busy */
+#define TARGET_EFBIG           27      /* File too large */
+#define TARGET_ENOSPC          28      /* No space left on device */
+#define TARGET_ESPIPE          29      /* Illegal seek */
+#define TARGET_EROFS           30      /* Read-only file system */
+#define TARGET_EMLINK          31      /* Too many links */
+#define TARGET_EPIPE           32      /* Broken pipe */
+#define TARGET_EDOM            33      /* Math argument out of domain of func */
+#define TARGET_ERANGE          34      /* Math result not representable */
+
+#define TARGET_EDEADLK         35      /* Resource deadlock would occur */
+#define TARGET_ENAMETOOLONG    36      /* File name too long */
+#define TARGET_ENOLCK          37      /* No record locks available */
+#define TARGET_ENOSYS          38      /* Function not implemented */
+#define TARGET_ENOTEMPTY       39      /* Directory not empty */
+#define TARGET_ELOOP           40      /* Too many symbolic links encountered */
+
+#define TARGET_ENOMSG          42      /* No message of desired type */
+#define TARGET_EIDRM           43      /* Identifier removed */
+#define TARGET_ECHRNG          44      /* Channel number out of range */
+#define TARGET_EL2NSYNC        45      /* Level 2 not synchronized */
+#define TARGET_EL3HLT          46      /* Level 3 halted */
+#define TARGET_EL3RST          47      /* Level 3 reset */
+#define TARGET_ELNRNG          48      /* Link number out of range */
+#define TARGET_EUNATCH         49      /* Protocol driver not attached */
+#define TARGET_ENOCSI          50      /* No CSI structure available */
+#define TARGET_EL2HLT          51      /* Level 2 halted */
+#define TARGET_EBADE           52      /* Invalid exchange */
+#define TARGET_EBADR           53      /* Invalid request descriptor */
+#define TARGET_EXFULL          54      /* TARGET_Exchange full */
+#define TARGET_ENOANO          55      /* No anode */
+#define TARGET_EBADRQC         56      /* Invalid request code */
+#define TARGET_EBADSLT         57      /* Invalid slot */
+
+#define TARGET_EBFONT          59      /* Bad font file format */
+#define TARGET_ENOSTR          60      /* Device not a stream */
+#define TARGET_ENODATA         61      /* No data available */
+#define TARGET_ETIME           62      /* Timer expired */
+#define TARGET_ENOSR           63      /* Out of streams resources */
+#define TARGET_ENONET          64      /* Machine is not on the network */
+#define TARGET_ENOPKG          65      /* Package not installed */
+#define TARGET_EREMOTE         66      /* Object is remote */
+#define TARGET_ENOLINK         67      /* Link has been severed */
+#define TARGET_EADV            68      /* Advertise error */
+#define TARGET_ESRMNT          69      /* Srmount error */
+#define TARGET_ECOMM           70      /* Communication error on send */
+#define TARGET_EPROTO          71      /* Protocol error */
+#define TARGET_EMULTIHOP       72      /* Multihop attempted */
+#define TARGET_EDOTDOT         73      /* RFS specific error */
+#define TARGET_EBADMSG         74      /* Not a data message */
+#define TARGET_EOVERFLOW       75      /* Value too large for defined data type */
+#define TARGET_ENOTUNIQ        76      /* Name not unique on network */
+#define TARGET_EBADFD          77      /* File descriptor in bad state */
+#define TARGET_EREMCHG         78      /* Remote address changed */
+#define TARGET_ELIBACC         79      /* Can not access a needed shared library */
+#define TARGET_ELIBBAD         80      /* Accessing a corrupted shared library */
+#define TARGET_ELIBSCN         81      /* .lib section in a.out corrupted */
+#define TARGET_ELIBMAX         82      /* Attempting to link in too many shared libraries */
+#define TARGET_ELIBEXEC        83      /* Cannot exec a shared library directly */
+#define TARGET_EILSEQ          84      /* Illegal byte sequence */
+#define TARGET_ERESTART        85      /* Interrupted system call should be restarted */
+#define TARGET_ESTRPIPE        86      /* Streams pipe error */
+#define TARGET_EUSERS          87      /* Too many users */
+#define TARGET_ENOTSOCK        88      /* Socket operation on non-socket */
+#define TARGET_EDESTADDRREQ    89      /* Destination address required */
+#define TARGET_EMSGSIZE        90      /* Message too long */
+#define TARGET_EPROTOTYPE      91      /* Protocol wrong type for socket */
+#define TARGET_ENOPROTOOPT     92      /* Protocol not available */
+#define TARGET_EPROTONOSUPPORT 93      /* Protocol not supported */
+#define TARGET_ESOCKTNOSUPPORT 94      /* Socket type not supported */
+#define TARGET_EOPNOTSUPP      95      /* Operation not supported on transport endpoint */
+#define TARGET_EPFNOSUPPORT    96      /* Protocol family not supported */
+#define TARGET_EAFNOSUPPORT    97      /* Address family not supported by protocol */
+#define TARGET_EADDRINUSE      98      /* Address already in use */
+#define TARGET_EADDRNOTAVAIL   99      /* Cannot assign requested address */
+#define TARGET_ENETDOWN        100     /* Network is down */
+#define TARGET_ENETUNREACH     101     /* Network is unreachable */
+#define TARGET_ENETRESET       102     /* Network dropped connection because of reset */
+#define TARGET_ECONNABORTED    103     /* Software caused connection abort */
+#define TARGET_ECONNRESET      104     /* Connection reset by peer */
+#define TARGET_ENOBUFS         105     /* No buffer space available */
+#define TARGET_EISCONN         106     /* Transport endpoint is already connected */
+#define TARGET_ENOTCONN        107     /* Transport endpoint is not connected */
+#define TARGET_ESHUTDOWN       108     /* Cannot send after transport endpoint shutdown */
+#define TARGET_ETOOMANYREFS    109     /* Too many references: cannot splice */
+#define TARGET_ETIMEDOUT       110     /* Connection timed out */
+#define TARGET_ECONNREFUSED    111     /* Connection refused */
+#define TARGET_EHOSTDOWN       112     /* Host is down */
+#define TARGET_EHOSTUNREACH    113     /* No route to host */
+#define TARGET_EALREADY        114     /* Operation already in progress */
+#define TARGET_EINPROGRESS     115     /* Operation now in progress */
+#define TARGET_ESTALE          116     /* Stale NFS file handle */
+#define TARGET_EUCLEAN         117     /* Structure needs cleaning */
+#define TARGET_ENOTNAM         118     /* Not a XENIX named type file */
+#define TARGET_ENAVAIL         119     /* No XENIX semaphores available */
+#define TARGET_EISNAM          120     /* Is a named type file */
+#define TARGET_EREMOTEIO       121     /* Remote I/O error */
+#define TARGET_EDQUOT          122     /* Quota exceeded */
+
+#define TARGET_ENOMEDIUM       123     /* No medium found */
+#define TARGET_EMEDIUMTYPE     124     /* Wrong medium type */
+#define TARGET_ECANCELED       125     /* Operation Canceled */
+#define TARGET_ENOKEY          126     /* Required key not available */
+#define TARGET_EKEYEXPIRED     127     /* Key has expired */
+#define TARGET_EKEYREVOKED     128     /* Key has been revoked */
+#define TARGET_EKEYREJECTED    129     /* Key was rejected by service */
+
+/* for robust mutexes */
+#define TARGET_EOWNERDEAD      130     /* Owner died */
+#define TARGET_ENOTRECOVERABLE 131     /* State not recoverable */
+
+#define TARGET_ERFKILL         132     /* Operation not possible due to RF-kill */
+#define TARGET_EHWPOISON       133     /* Memory page has hardware error */
+
+/* QEMU internal, not visible to the guest. This is returned when a
+ * system call should be restarted, to tell the main loop that it
+ * should wind the guest PC backwards so it will re-execute the syscall
+ * after handling any pending signals. They match with the ones the guest
+ * kernel uses for the same purpose.
+ */
+#define TARGET_ERESTARTSYS     512     /* Restart system call (if SA_RESTART) */
+
+/* QEMU internal, not visible to the guest. This is returned by the
+ * do_sigreturn() code after a successful sigreturn syscall, to indicate
+ * that it has correctly set the guest registers and so the main loop
+ * should not touch them. We use the value the guest would use for
+ * ERESTART_NOINTR (which is kernel internal) to guarantee that we won't
+ * clash with a valid guest errno now or in the future.
+ */
+#define TARGET_QEMU_ESIGRETURN 513     /* Return from signal */
+
+#endif
diff --git a/linux-user/generic/termbits.h b/linux-user/generic/termbits.h
new file mode 100644
index 000000000..6675e0d1a
--- /dev/null
+++ b/linux-user/generic/termbits.h
@@ -0,0 +1,318 @@
+/* Derived from asm-generic/termbits.h */
+
+#ifndef GENERIC_TERMBITS_H
+#define GENERIC_TERMBITS_H
+
+typedef unsigned char   target_cc_t;        /* cc_t */
+typedef unsigned int    target_speed_t;     /* speed_t */
+typedef unsigned int    target_tcflag_t;    /* tcflag_t */
+
+#define TARGET_NCCS 19
+
+struct target_termios {
+    target_tcflag_t c_iflag;         /* input mode flags */
+    target_tcflag_t c_oflag;         /* output mode flags */
+    target_tcflag_t c_cflag;         /* control mode flags */
+    target_tcflag_t c_lflag;         /* local mode flags */
+    target_cc_t c_line;              /* line discipline */
+    target_cc_t c_cc[TARGET_NCCS];   /* control characters */
+};
+
+struct target_termios2 {
+    target_tcflag_t c_iflag;       /* input mode flags */
+    target_tcflag_t c_oflag;       /* output mode flags */
+    target_tcflag_t c_cflag;       /* control mode flags */
+    target_tcflag_t c_lflag;       /* local mode flags */
+    target_cc_t c_line;            /* line discipline */
+    target_cc_t c_cc[TARGET_NCCS]; /* control characters */
+    target_speed_t c_ispeed;       /* input speed */
+    target_speed_t c_ospeed;       /* output speed */
+};
+
+struct target_ktermios {
+    target_tcflag_t c_iflag;       /* input mode flags */
+    target_tcflag_t c_oflag;       /* output mode flags */
+    target_tcflag_t c_cflag;       /* control mode flags */
+    target_tcflag_t c_lflag;       /* local mode flags */
+    target_cc_t c_line;            /* line discipline */
+    target_cc_t c_cc[TARGET_NCCS]; /* control characters */
+    target_speed_t c_ispeed;       /* input speed */
+    target_speed_t c_ospeed;       /* output speed */
+};
+
+/* c_cc character offsets */
+#define TARGET_VINTR    0
+#define TARGET_VQUIT    1
+#define TARGET_VERASE   2
+#define TARGET_VKILL    3
+#define TARGET_VEOF     4
+#define TARGET_VTIME    5
+#define TARGET_VMIN     6
+#define TARGET_VSWTC    7
+#define TARGET_VSTART   8
+#define TARGET_VSTOP    9
+#define TARGET_VSUSP    10
+#define TARGET_VEOL     11
+#define TARGET_VREPRINT 12
+#define TARGET_VDISCARD 13
+#define TARGET_VWERASE  14
+#define TARGET_VLNEXT   15
+#define TARGET_VEOL2    16
+
+/* c_iflag bits */
+#define TARGET_IGNBRK   0000001
+#define TARGET_BRKINT   0000002
+#define TARGET_IGNPAR   0000004
+#define TARGET_PARMRK   0000010
+#define TARGET_INPCK    0000020
+#define TARGET_ISTRIP   0000040
+#define TARGET_INLCR    0000100
+#define TARGET_IGNCR    0000200
+#define TARGET_ICRNL    0000400
+#define TARGET_IUCLC    0001000
+#define TARGET_IXON     0002000
+#define TARGET_IXANY    0004000
+#define TARGET_IXOFF    0010000
+#define TARGET_IMAXBEL  0020000
+#define TARGET_IUTF8    0040000
+
+/* c_oflag bits */
+#define TARGET_OPOST    0000001
+#define TARGET_OLCUC    0000002
+#define TARGET_ONLCR    0000004
+#define TARGET_OCRNL    0000010
+#define TARGET_ONOCR    0000020
+#define TARGET_ONLRET   0000040
+#define TARGET_OFILL    0000100
+#define TARGET_OFDEL    0000200
+#define TARGET_NLDLY    0000400
+#define  TARGET_NL0     0000000
+#define  TARGET_NL1     0000400
+#define TARGET_CRDLY    0003000
+#define  TARGET_CR0     0000000
+#define  TARGET_CR1     0001000
+#define  TARGET_CR2     0002000
+#define  TARGET_CR3     0003000
+#define TARGET_TABDLY   0014000
+#define  TARGET_TAB0    0000000
+#define  TARGET_TAB1    0004000
+#define  TARGET_TAB2    0010000
+#define  TARGET_TAB3    0014000
+#define  TARGET_XTABS   0014000
+#define TARGET_BSDLY    0020000
+#define  TARGET_BS0     0000000
+#define  TARGET_BS1     0020000
+#define TARGET_VTDLY    0040000
+#define  TARGET_VT0     0000000
+#define  TARGET_VT1     0040000
+#define TARGET_FFDLY    0100000
+#define  TARGET_FF0     0000000
+#define  TARGET_FF1     0100000
+
+/* c_cflag bit meaning */
+#define TARGET_CBAUD      0010017
+#define  TARGET_B0        0000000  /* hang up */
+#define  TARGET_B50       0000001
+#define  TARGET_B75       0000002
+#define  TARGET_B110      0000003
+#define  TARGET_B134      0000004
+#define  TARGET_B150      0000005
+#define  TARGET_B200      0000006
+#define  TARGET_B300      0000007
+#define  TARGET_B600      0000010
+#define  TARGET_B1200     0000011
+#define  TARGET_B1800     0000012
+#define  TARGET_B2400     0000013
+#define  TARGET_B4800     0000014
+#define  TARGET_B9600     0000015
+#define  TARGET_B19200    0000016
+#define  TARGET_B38400    0000017
+#define  TARGET_EXTA      TARGET_B19200
+#define  TARGET_EXTB      TARGET_B38400
+#define TARGET_CSIZE      0000060
+#define  TARGET_CS5       0000000
+#define  TARGET_CS6       0000020
+#define  TARGET_CS7       0000040
+#define  TARGET_CS8       0000060
+#define TARGET_CSTOPB     0000100
+#define TARGET_CREAD      0000200
+#define TARGET_PARENB     0000400
+#define TARGET_PARODD     0001000
+#define TARGET_HUPCL      0002000
+#define TARGET_CLOCAL     0004000
+#define TARGET_CBAUDEX    0010000
+#define  TARGET_BOTHER    0010000
+#define  TARGET_B57600    0010001
+#define  TARGET_B115200   0010002
+#define  TARGET_B230400   0010003
+#define  TARGET_B460800   0010004
+#define  TARGET_B500000   0010005
+#define  TARGET_B576000   0010006
+#define  TARGET_B921600   0010007
+#define  TARGET_B1000000  0010010
+#define  TARGET_B1152000  0010011
+#define  TARGET_B1500000  0010012
+#define  TARGET_B2000000  0010013
+#define  TARGET_B2500000  0010014
+#define  TARGET_B3000000  0010015
+#define  TARGET_B3500000  0010016
+#define  TARGET_B4000000  0010017
+#define TARGET_CIBAUD     002003600000  /* input baud rate (not used) */
+#define TARGET_CMSPAR     010000000000  /* mark or space (stick) parity */
+#define TARGET_CRTSCTS    020000000000  /* flow control */
+
+#define TARGET_IBSHIFT    16            /* Shift from CBAUD to CIBAUD */
+
+/* c_lflag bits */
+#define TARGET_ISIG       0000001
+#define TARGET_ICANON     0000002
+#define TARGET_XCASE      0000004
+#define TARGET_ECHO       0000010
+#define TARGET_ECHOE      0000020
+#define TARGET_ECHOK      0000040
+#define TARGET_ECHONL     0000100
+#define TARGET_NOFLSH     0000200
+#define TARGET_TOSTOP     0000400
+#define TARGET_ECHOCTL    0001000
+#define TARGET_ECHOPRT    0002000
+#define TARGET_ECHOKE     0004000
+#define TARGET_FLUSHO     0010000
+#define TARGET_PENDIN     0040000
+#define TARGET_IEXTEN     0100000
+#define TARGET_EXTPROC    0200000
+
+/* tcflow() and TCXONC use these */
+#define TARGET_TCOOFF          0
+#define TARGET_TCOON           1
+#define TARGET_TCIOFF          2
+#define TARGET_TCION           3
+
+/* tcflush() and TCFLSH use these */
+#define TARGET_TCIFLUSH        0
+#define TARGET_TCOFLUSH        1
+#define TARGET_TCIOFLUSH       2
+
+/* tcsetattr uses these */
+#define TARGET_TCSANOW         0
+#define TARGET_TCSADRAIN       1
+#define TARGET_TCSAFLUSH       2
+
+/* Derived from include/uapi/asm-generic/ioctls.h */
+
+#define TARGET_TCGETS           0x5401
+#define TARGET_TCSETS           0x5402
+#define TARGET_TCSETSW          0x5403
+#define TARGET_TCSETSF          0x5404
+#define TARGET_TCGETA           0x5405
+#define TARGET_TCSETA           0x5406
+#define TARGET_TCSETAW          0x5407
+#define TARGET_TCSETAF          0x5408
+#define TARGET_TCSBRK           0x5409
+#define TARGET_TCXONC           0x540A
+#define TARGET_TCFLSH           0x540B
+
+#define TARGET_TIOCEXCL         0x540C
+#define TARGET_TIOCNXCL         0x540D
+#define TARGET_TIOCSCTTY        0x540E
+#define TARGET_TIOCGPGRP        0x540F
+#define TARGET_TIOCSPGRP        0x5410
+#define TARGET_TIOCOUTQ         0x5411
+#define TARGET_TIOCSTI          0x5412
+#define TARGET_TIOCGWINSZ       0x5413
+#define TARGET_TIOCSWINSZ       0x5414
+#define TARGET_TIOCMGET         0x5415
+#define TARGET_TIOCMBIS         0x5416
+#define TARGET_TIOCMBIC         0x5417
+#define TARGET_TIOCMSET         0x5418
+#define TARGET_TIOCGSOFTCAR     0x5419
+#define TARGET_TIOCSSOFTCAR     0x541A
+#define TARGET_FIONREAD         0x541B
+#define TARGET_TIOCINQ          TARGET_FIONREAD
+#define TARGET_TIOCLINUX        0x541C
+#define TARGET_TIOCCONS         0x541D
+#define TARGET_TIOCGSERIAL      0x541E
+#define TARGET_TIOCSSERIAL      0x541F
+#define TARGET_TIOCPKT          0x5420
+#define TARGET_FIONBIO          0x5421
+#define TARGET_TIOCNOTTY        0x5422
+#define TARGET_TIOCSETD         0x5423
+#define TARGET_TIOCGETD         0x5424
+#define TARGET_TCSBRKP          0x5425 /* Needed for POSIX tcsendbreak() */
+#define TARGET_TIOCTTYGSTRUCT   0x5426 /* For debugging only */
+#define TARGET_TIOCSBRK         0x5427 /* BSD compatibility */
+#define TARGET_TIOCCBRK         0x5428 /* BSD compatibility */
+#define TARGET_TIOCGSID         0x5429 /* Return the session ID of FD */
+#define TARGET_TCGETS2          TARGET_IOR('T', 0x2A, struct target_termios2)
+#define TARGET_TCSETS2          TARGET_IOW('T', 0x2B, struct target_termios2)
+#define TARGET_TCSETSW2         TARGET_IOW('T', 0x2C, struct target_termios2)
+#define TARGET_TCSETSF2         TARGET_IOW('T', 0x2D, struct target_termios2)
+#define TARGET_TIOCGRS485       0x542E
+#ifndef TARGET_TIOCSRS485
+#define TARGET_TIOCSRS485       0x542F
+#endif
+/* Get Pty Number (of pty-mux device) */
+#define TARGET_TIOCGPTN         TARGET_IOR('T', 0x30, unsigned int)
+/* Lock/unlock Pty */
+#define TARGET_TIOCSPTLCK       TARGET_IOW('T', 0x31, int)
+
+/* Get primary device node of /dev/console */
+#define TARGET_TIOCGDEV        TARGET_IOR('T', 0x32, unsigned int)
+#define TARGET_TCGETX          0x5432 /* SYS5 TCGETX compatibility */
+#define TARGET_TCSETX          0x5433
+#define TARGET_TCSETXF         0x5434
+#define TARGET_TCSETXW         0x5435
+/* pty: generate signal */
+#define TARGET_TIOCSIG         TARGET_IOW('T', 0x36, int)
+#define TARGET_TIOCVHANGUP     0x5437
+/* Get packet mode state */
+#define TARGET_TIOCGPKT        TARGET_IOR('T', 0x38, int)
+/* Get Pty lock state */
+#define TARGET_TIOCGPTLCK      TARGET_IOR('T', 0x39, int)
+/* Get exclusive mode state */
+#define TARGET_TIOCGEXCL       TARGET_IOR('T', 0x40, int)
+/* Safely open the slave */
+#define TARGET_TIOCGPTPEER     TARGET_IO('T', 0x41)
+#define TARGET_TIOCGISO7816    TARGET_IOR('T', 0x42, struct serial_iso7816)
+#define TARGET_TIOCSISO7816    TARGET_IOWR('T', 0x43, struct serial_iso7816)
+
+#define TARGET_FIONCLEX         0x5450 /* these numbers need to be adjusted */
+#define TARGET_FIOCLEX          0x5451
+#define TARGET_FIOASYNC         0x5452
+#define TARGET_TIOCSERCONFIG    0x5453
+#define TARGET_TIOCSERGWILD     0x5454
+#define TARGET_TIOCSERSWILD     0x5455
+#define TARGET_TIOCGLCKTRMIOS   0x5456
+#define TARGET_TIOCSLCKTRMIOS   0x5457
+#define TARGET_TIOCSERGSTRUCT   0x5458 /* For debugging only */
+#define TARGET_TIOCSERGETLSR    0x5459 /* Get line status register */
+#define TARGET_TIOCSERGETMULTI  0x545A /* Get multiport config  */
+#define TARGET_TIOCSERSETMULTI  0x545B /* Set multiport config */
+
+/* wait for a change on serial input line(s) */
+#define TARGET_TIOCMIWAIT       0x545C
+/* read serial port inline interrupt counts */
+#define TARGET_TIOCGICOUNT      0x545D
+#define TARGET_TIOCGHAYESESP    0x545E  /* Get Hayes ESP configuration */
+#define TARGET_TIOCSHAYESESP    0x545F  /* Set Hayes ESP configuration */
+
+/*
+ * Some arches already define TARGET_FIOQSIZE due to a historical
+ * conflict with a Hayes modem-specific ioctl value.
+ */
+#ifndef TARGET_FIOQSIZE
+# define TARGET_FIOQSIZE        0x5460
+#endif
+
+/* Used for packet mode */
+#define TARGET_TIOCPKT_DATA              0
+#define TARGET_TIOCPKT_FLUSHREAD         1
+#define TARGET_TIOCPKT_FLUSHWRITE        2
+#define TARGET_TIOCPKT_STOP              4
+#define TARGET_TIOCPKT_START             8
+#define TARGET_TIOCPKT_NOSTOP            16
+#define TARGET_TIOCPKT_DOSTOP            32
+#define TARGET_TIOCPKT_IOCTL             64
+
+#define TARGET_TIOCSER_TEMT     0x01 /* Transmitter physically empty */
+
+#endif