[PATCH v2 14/19] hw/9pfs: Add Linux error number definition

[Bin Meng <bin.meng@windriver.com>]

From: Guohuai Shi <guohuai.shi@windriver.com>

When using 9p2000.L protocol, the errno should use the Linux errno.
Currently magic numbers with comments are used. Replace these with
macros for future expansion.

Signed-off-by: Guohuai Shi <guohuai.shi@windriver.com>
Signed-off-by: Bin Meng <bin.meng@windriver.com>

---

Changes in v2:
- Use a more compact solution in the switch..case.. block

 hw/9pfs/9p-linux-errno.h | 151 +++++++++++++++++++++++++++++++++++++++
 hw/9pfs/9p-util.h        |  25 ++++---
 2 files changed, 163 insertions(+), 13 deletions(-)
 create mode 100644 hw/9pfs/9p-linux-errno.h

diff --git a/hw/9pfs/9p-linux-errno.h b/hw/9pfs/9p-linux-errno.h
new file mode 100644
index 0000000000..56c37fa293
--- /dev/null
+++ b/hw/9pfs/9p-linux-errno.h
@@ -0,0 +1,151 @@
+/*
+ * 9p Linux errno translation definition
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include <errno.h>
+
+#ifndef QEMU_9P_LINUX_ERRNO_H
+#define QEMU_9P_LINUX_ERRNO_H
+
+/*
+ * This file contains the Linux errno definitions to translate errnos set by
+ * the 9P server (running on non-Linux hosts) to a corresponding errno value.
+ *
+ * This list should be periodically reviewed and updated; particularly for
+ * errnos that might be set as a result of a file system operation.
+ */
+
+#define L_EPERM             1   /* Operation not permitted */
+#define L_ENOENT            2   /* No such file or directory */
+#define L_ESRCH             3   /* No such process */
+#define L_EINTR             4   /* Interrupted system call */
+#define L_EIO               5   /* I/O error */
+#define L_ENXIO             6   /* No such device or address */
+#define L_E2BIG             7   /* Argument list too long */
+#define L_ENOEXEC           8   /* Exec format error */
+#define L_EBADF             9   /* Bad file number */
+#define L_ECHILD            10  /* No child processes */
+#define L_EAGAIN            11  /* Try again */
+#define L_ENOMEM            12  /* Out of memory */
+#define L_EACCES            13  /* Permission denied */
+#define L_EFAULT            14  /* Bad address */
+#define L_ENOTBLK           15  /* Block device required */
+#define L_EBUSY             16  /* Device or resource busy */
+#define L_EEXIST            17  /* File exists */
+#define L_EXDEV             18  /* Cross-device link */
+#define L_ENODEV            19  /* No such device */
+#define L_ENOTDIR           20  /* Not a directory */
+#define L_EISDIR            21  /* Is a directory */
+#define L_EINVAL            22  /* Invalid argument */
+#define L_ENFILE            23  /* File table overflow */
+#define L_EMFILE            24  /* Too many open files */
+#define L_ENOTTY            25  /* Not a typewriter */
+#define L_ETXTBSY           26  /* Text file busy */
+#define L_EFBIG             27  /* File too large */
+#define L_ENOSPC            28  /* No space left on device */
+#define L_ESPIPE            29  /* Illegal seek */
+#define L_EROFS             30  /* Read-only file system */
+#define L_EMLINK            31  /* Too many links */
+#define L_EPIPE             32  /* Broken pipe */
+#define L_EDOM              33  /* Math argument out of domain of func */
+#define L_ERANGE            34  /* Math result not representable */
+#define L_EDEADLK           35  /* Resource deadlock would occur */
+#define L_ENAMETOOLONG      36  /* File name too long */
+#define L_ENOLCK            37  /* No record locks available */
+#define L_ENOSYS            38  /* Function not implemented */
+#define L_ENOTEMPTY         39  /* Directory not empty */
+#define L_ELOOP             40  /* Too many symbolic links encountered */
+#define L_ENOMSG            42  /* No message of desired type */
+#define L_EIDRM             43  /* Identifier removed */
+#define L_ECHRNG            44  /* Channel number out of range */
+#define L_EL2NSYNC          45  /* Level 2 not synchronized */
+#define L_EL3HLT            46  /* Level 3 halted */
+#define L_EL3RST            47  /* Level 3 reset */
+#define L_ELNRNG            48  /* Link number out of range */
+#define L_EUNATCH           49  /* Protocol driver not attached */
+#define L_ENOCSI            50  /* No CSI structure available */
+#define L_EL2HLT            51  /* Level 2 halted */
+#define L_EBADE             52  /* Invalid exchange */
+#define L_EBADR             53  /* Invalid request descriptor */
+#define L_EXFULL            54  /* Exchange full */
+#define L_ENOANO            55  /* No anode */
+#define L_EBADRQC           56  /* Invalid request code */
+#define L_EBADSLT           57  /* Invalid slot */
+#define L_EBFONT            58  /* Bad font file format */
+#define L_ENOSTR            59  /* Device not a stream */
+#define L_ENODATA           61  /* No data available */
+#define L_ETIME             62  /* Timer expired */
+#define L_ENOSR             63  /* Out of streams resources */
+#define L_ENONET            64  /* Machine is not on the network */
+#define L_ENOPKG            65  /* Package not installed */
+#define L_EREMOTE           66  /* Object is remote */
+#define L_ENOLINK           67  /* Link has been severed */
+#define L_EADV              68  /* Advertise error */
+#define L_ESRMNT            69  /* Srmount error */
+#define L_ECOMM             70  /* Communication error on send */
+#define L_EPROTO            71  /* Protocol error */
+#define L_EMULTIHOP         72  /* Multihop attempted */
+#define L_EDOTDOT           73  /* RFS specific error */
+#define L_EBADMSG           74  /* Not a data message */
+#define L_EOVERFLOW         75  /* Value too large for defined data type */
+#define L_ENOTUNIQ          76  /* Name not unique on network */
+#define L_EBADFD            77  /* File descriptor in bad state */
+#define L_EREMCHG           78  /* Remote address changed */
+#define L_ELIBACC           79  /* Can not access a needed shared library */
+#define L_ELIBBAD           80  /* Accessing a corrupted shared library */
+#define L_ELIBSCN           81  /* .lib section in a.out corrupted */
+#define L_ELIBMAX           82  /* Attempting to link in too many shared libs */
+#define L_ELIBEXEC          83  /* Cannot exec a shared library directly */
+#define L_EILSEQ            84  /* Illegal byte sequence */
+#define L_ERESTART          85  /* Interrupted system call should be restarted */
+#define L_ESTRPIPE          86  /* Streams pipe error */
+#define L_EUSERS            87  /* Too many users */
+#define L_ENOTSOCK          88  /* Socket operation on non-socket */
+#define L_EDESTADDRREQ      89  /* Destination address required */
+#define L_EMSGSIZE          90  /* Message too long */
+#define L_EPROTOTYPE        91  /* Protocol wrong type for socket */
+#define L_ENOPROTOOPT       92  /* Protocol not available */
+#define L_EPROTONOSUPPORT   93  /* Protocol not supported */
+#define L_ESOCKTNOSUPPORT   94  /* Socket type not supported */
+#define L_EOPNOTSUPP        95  /* Operation not supported on transport endpoint */
+#define L_EPFNOSUPPORT      96  /* Protocol family not supported */
+#define L_EAFNOSUPPORT      97  /* Address family not supported by protocol */
+#define L_EADDRINUSE        98  /* Address already in use */
+#define L_EADDRNOTAVAIL     99  /* Cannot assign requested address */
+#define L_ENETDOWN          100 /* Network is down */
+#define L_ENETUNREACH       101 /* Network is unreachable */
+#define L_ENETRESET         102 /* Network dropped connection because of reset */
+#define L_ECONNABORTED      103 /* Software caused connection abort */
+#define L_ECONNRESET        104 /* Connection reset by peer */
+#define L_ENOBUFS           105 /* No buffer space available */
+#define L_EISCONN           106 /* Transport endpoint is already connected */
+#define L_ENOTCONN          107 /* Transport endpoint is not connected */
+#define L_ESHUTDOWN         108 /* Cannot send after transport endpoint shutdown */
+#define L_ETOOMANYREFS      109 /* Too many references: cannot splice */
+#define L_ETIMEDOUT         110 /* Connection timed out */
+#define L_ECONNREFUSED      111 /* Connection refused */
+#define L_EHOSTDOWN         112 /* Host is down */
+#define L_EHOSTUNREACH      113 /* No route to host */
+#define L_EALREADY          114 /* Operation already in progress */
+#define L_EINPROGRESS       115 /* Operation now in progress */
+#define L_ESTALE            116 /* Stale NFS file handle */
+#define L_EUCLEAN           117 /* Structure needs cleaning */
+#define L_ENOTNAM           118 /* Not a XENIX named type file */
+#define L_ENAVAIL           119 /* No XENIX semaphores available */
+#define L_EISNAM            120 /* Is a named type file */
+#define L_EREMOTEIO         121 /* Remote I/O error */
+#define L_EDQUOT            122 /* Quota exceeded */
+#define L_ENOMEDIUM         123 /* No medium found */
+#define L_EMEDIUMTYPE       124 /* Wrong medium type */
+#define L_ECANCELED         125 /* Operation Canceled */
+#define L_ENOKEY            126 /* Required key not available */
+#define L_EKEYEXPIRED       127 /* Key has expired */
+#define L_EKEYREVOKED       128 /* Key has been revoked */
+#define L_EKEYREJECTED      129 /* Key was rejected by service */
+#define L_EOWNERDEAD        130 /* Owner died */
+#define L_ENOTRECOVERABLE   131 /* State not recoverable */
+
+#endif /* QEMU_9P_LINUX_ERRNO_H */
diff --git a/hw/9pfs/9p-util.h b/hw/9pfs/9p-util.h
index df84374b78..c76a53f2a8 100644
--- a/hw/9pfs/9p-util.h
+++ b/hw/9pfs/9p-util.h
@@ -60,8 +60,11 @@ static inline uint64_t host_dev_to_dotl_dev(dev_t dev)
 #endif
 }
 
+#include "9p-linux-errno.h"
+
 /* Translates errno from host -> Linux if needed */
-static inline int errno_to_dotl(int err) {
+static inline int errno_to_dotl(int err)
+{
 #if defined(CONFIG_LINUX)
     /* nothing to translate (Linux -> Linux) */
 #elif defined(CONFIG_DARWIN)
@@ -71,18 +74,14 @@ static inline int errno_to_dotl(int err) {
      * FIXME: Only most important errnos translated here yet, this should be
      * extended to as many errnos being translated as possible in future.
      */
-    if (err == ENAMETOOLONG) {
-        err = 36; /* ==ENAMETOOLONG on Linux */
-    } else if (err == ENOTEMPTY) {
-        err = 39; /* ==ENOTEMPTY on Linux */
-    } else if (err == ELOOP) {
-        err = 40; /* ==ELOOP on Linux */
-    } else if (err == ENOATTR) {
-        err = 61; /* ==ENODATA on Linux */
-    } else if (err == ENOTSUP) {
-        err = 95; /* ==EOPNOTSUPP on Linux */
-    } else if (err == EOPNOTSUPP) {
-        err = 95; /* ==EOPNOTSUPP on Linux */
+    switch (err) {
+    case ENAMETOOLONG:  return L_ENAMETOOLONG;
+    case ENOTEMPTY:     return L_ENOTEMPTY;
+    case ELOOP:         return L_ELOOP;
+    case ENOATTR:       return L_ENODATA;
+    case ENOTSUP        return L_EOPNOTSUPP;
+    case EOPNOTSUPP:    return L_EOPNOTSUPP;
+    default:            g_assert_not_reached();
     }
 #else
 #error Missing errno translation to Linux for this host system
-- 
2.25.1