OvmfPkg/VirtioFsDxe: map "errno" values to EFI_STATUS

The VirtioFsFuseCheckResponse() function dedicates the EFI_DEVICE_ERROR
status code to the case when the Virtio Filesystem device explicitly
returns an error via the "VIRTIO_FS_FUSE_RESPONSE.Error" field.

Said field effectively carries a Linux "errno" value. Introduce a helper
function for mapping "errno" values to (hopefully) reasonable EFI_STATUS
codes. This way we'll be able to propagate "errno" values as EFI_STATUS
return codes along the UEFI call stack -- in some detail anyway.

Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3097
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20201216211125.19496-8-lersek@redhat.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@arm.com>

1 files changed, 200 insertions, 0 deletions

diff --git a/OvmfPkg/VirtioFsDxe/Helpers.c b/OvmfPkg/VirtioFsDxe/Helpers.c
index 8444891907..b408913186 100644
--- a/OvmfPkg/VirtioFsDxe/Helpers.c
+++ b/OvmfPkg/VirtioFsDxe/Helpers.c
@@ -914,3 +914,203 @@ VirtioFsFuseCheckResponse (
 

   return EFI_SUCCESS;

 }

+

+/**

+  An ad-hoc function for mapping FUSE (well, Linux) "errno" values to

+  EFI_STATUS.

+

+  @param[in] Errno  The "VIRTIO_FS_FUSE_RESPONSE.Error" value, returned by the

+                    Virtio Filesystem device. The value is expected to be

+                    negative.

+

+  @return                   An EFI_STATUS error code that's deemed a passable

+                            mapping for the Errno value.

+

+  @retval EFI_DEVICE_ERROR  Fallback EFI_STATUS code for unrecognized Errno

+                            values.

+**/

+EFI_STATUS

+VirtioFsErrnoToEfiStatus (

+  IN INT32 Errno

+  )

+{

+  switch (Errno) {

+  case   -1: // EPERM               Operation not permitted

+    return EFI_SECURITY_VIOLATION;

+

+  case   -2: // ENOENT              No such file or directory

+  case   -3: // ESRCH               No such process

+  case   -6: // ENXIO               No such device or address

+  case  -10: // ECHILD              No child processes

+  case  -19: // ENODEV              No such device

+  case  -49: // EUNATCH             Protocol driver not attached

+  case  -65: // ENOPKG              Package not installed

+  case  -79: // ELIBACC             Can not access a needed shared library

+  case -126: // ENOKEY              Required key not available

+    return EFI_NOT_FOUND;

+

+  case   -4: // EINTR               Interrupted system call

+  case  -11: // EAGAIN, EWOULDBLOCK Resource temporarily unavailable

+  case  -16: // EBUSY               Device or resource busy

+  case  -26: // ETXTBSY             Text file busy

+  case  -35: // EDEADLK, EDEADLOCK  Resource deadlock avoided

+  case  -39: // ENOTEMPTY           Directory not empty

+  case  -42: // ENOMSG              No message of desired type

+  case  -61: // ENODATA             No data available

+  case  -85: // ERESTART            Interrupted system call should be restarted

+    return EFI_NOT_READY;

+

+  case   -5: // EIO                 Input/output error

+  case  -45: // EL2NSYNC            Level 2 not synchronized

+  case  -46: // EL3HLT              Level 3 halted

+  case  -47: // EL3RST              Level 3 reset

+  case  -51: // EL2HLT              Level 2 halted

+  case -121: // EREMOTEIO           Remote I/O error

+  case -133: // EHWPOISON           Memory page has hardware error

+    return EFI_DEVICE_ERROR;

+

+  case   -7: // E2BIG               Argument list too long

+  case  -36: // ENAMETOOLONG        File name too long

+  case  -90: // EMSGSIZE            Message too long

+    return EFI_BAD_BUFFER_SIZE;

+

+  case   -8: // ENOEXEC             Exec format error

+  case  -15: // ENOTBLK             Block device required

+  case  -18: // EXDEV               Invalid cross-device link

+  case  -20: // ENOTDIR             Not a directory

+  case  -21: // EISDIR              Is a directory

+  case  -25: // ENOTTY              Inappropriate ioctl for device

+  case  -27: // EFBIG               File too large

+  case  -29: // ESPIPE              Illegal seek

+  case  -38: // ENOSYS              Function not implemented

+  case  -59: // EBFONT              Bad font file format

+  case  -60: // ENOSTR              Device not a stream

+  case  -83: // ELIBEXEC            Cannot exec a shared library directly

+  case  -88: // ENOTSOCK            Socket operation on non-socket

+  case  -91: // EPROTOTYPE          Protocol wrong type for socket

+  case  -92: // ENOPROTOOPT         Protocol not available

+  case  -93: // EPROTONOSUPPORT     Protocol not supported

+  case  -94: // ESOCKTNOSUPPORT     Socket type not supported

+  case  -95: // ENOTSUP, EOPNOTSUPP Operation not supported

+  case  -96: // EPFNOSUPPORT        Protocol family not supported

+  case  -97: // EAFNOSUPPORT        Address family not supported by protocol

+  case  -99: // EADDRNOTAVAIL       Cannot assign requested address

+  case -118: // ENOTNAM             Not a XENIX named type file

+  case -120: // EISNAM              Is a named type file

+  case -124: // EMEDIUMTYPE         Wrong medium type

+    return EFI_UNSUPPORTED;

+

+  case   -9: // EBADF               Bad file descriptor

+  case  -14: // EFAULT              Bad address

+  case  -44: // ECHRNG              Channel number out of range

+  case  -48: // ELNRNG              Link number out of range

+  case  -53: // EBADR               Invalid request descriptor

+  case  -56: // EBADRQC             Invalid request code

+  case  -57: // EBADSLT             Invalid slot

+  case  -76: // ENOTUNIQ            Name not unique on network

+  case  -84: // EILSEQ        Invalid or incomplete multibyte or wide character

+    return EFI_NO_MAPPING;

+

+  case  -12: // ENOMEM              Cannot allocate memory

+  case  -23: // ENFILE              Too many open files in system

+  case  -24: // EMFILE              Too many open files

+  case  -31: // EMLINK              Too many links

+  case  -37: // ENOLCK              No locks available

+  case  -40: // ELOOP               Too many levels of symbolic links

+  case  -50: // ENOCSI              No CSI structure available

+  case  -55: // ENOANO              No anode

+  case  -63: // ENOSR               Out of streams resources

+  case  -82: // ELIBMAX         Attempting to link in too many shared libraries

+  case  -87: // EUSERS              Too many users

+  case -105: // ENOBUFS             No buffer space available

+  case -109: // ETOOMANYREFS        Too many references: cannot splice

+  case -119: // ENAVAIL             No XENIX semaphores available

+  case -122: // EDQUOT              Disk quota exceeded

+    return EFI_OUT_OF_RESOURCES;

+

+  case  -13: // EACCES              Permission denied

+    return EFI_ACCESS_DENIED;

+

+  case  -17: // EEXIST              File exists

+  case  -98: // EADDRINUSE          Address already in use

+  case -106: // EISCONN             Transport endpoint is already connected

+  case -114: // EALREADY            Operation already in progress

+  case -115: // EINPROGRESS         Operation now in progress

+    return EFI_ALREADY_STARTED;

+

+  case  -22: // EINVAL              Invalid argument

+  case  -33: // EDOM                Numerical argument out of domain

+    return EFI_INVALID_PARAMETER;

+

+  case  -28: // ENOSPC              No space left on device

+  case  -54: // EXFULL              Exchange full

+    return EFI_VOLUME_FULL;

+

+  case  -30: // EROFS               Read-only file system

+    return EFI_WRITE_PROTECTED;

+

+  case  -32: // EPIPE               Broken pipe

+  case  -43: // EIDRM               Identifier removed

+  case  -67: // ENOLINK             Link has been severed

+  case  -68: // EADV                Advertise error

+  case  -69: // ESRMNT              Srmount error

+  case  -70: // ECOMM               Communication error on send

+  case  -73: // EDOTDOT             RFS specific error

+  case  -78: // EREMCHG             Remote address changed

+  case  -86: // ESTRPIPE            Streams pipe error

+  case -102: // ENETRESET           Network dropped connection on reset

+  case -103: // ECONNABORTED        Software caused connection abort

+  case -104: // ECONNRESET          Connection reset by peer

+  case -116: // ESTALE              Stale file handle

+  case -125: // ECANCELED           Operation canceled

+  case -128: // EKEYREVOKED         Key has been revoked

+  case -129: // EKEYREJECTED        Key was rejected by service

+  case -130: // EOWNERDEAD          Owner died

+  case -131: // ENOTRECOVERABLE     State not recoverable

+    return EFI_ABORTED;

+

+  case  -34: // ERANGE              Numerical result out of range

+  case  -75: // EOVERFLOW           Value too large for defined data type

+    return EFI_BUFFER_TOO_SMALL;

+

+  case  -52: // EBADE               Invalid exchange

+  case -108: // ESHUTDOWN         Cannot send after transport endpoint shutdown

+  case -111: // ECONNREFUSED        Connection refused

+    return EFI_END_OF_FILE;

+

+  case  -62: // ETIME               Timer expired

+  case -110: // ETIMEDOUT           Connection timed out

+  case -127: // EKEYEXPIRED         Key has expired

+    return EFI_TIMEOUT;

+

+  case  -64: // ENONET              Machine is not on the network

+  case  -66: // EREMOTE             Object is remote

+  case  -72: // EMULTIHOP           Multihop attempted

+  case -100: // ENETDOWN            Network is down

+  case -101: // ENETUNREACH         Network is unreachable

+  case -112: // EHOSTDOWN           Host is down

+  case -113: // EHOSTUNREACH        No route to host

+  case -123: // ENOMEDIUM           No medium found

+  case -132: // ERFKILL             Operation not possible due to RF-kill

+    return EFI_NO_MEDIA;

+

+  case  -71: // EPROTO              Protocol error

+    return EFI_PROTOCOL_ERROR;

+

+  case  -74: // EBADMSG             Bad message

+  case  -77: // EBADFD              File descriptor in bad state

+  case  -80: // ELIBBAD             Accessing a corrupted shared library

+  case  -81: // ELIBSCN             .lib section in a.out corrupted

+  case -117: // EUCLEAN             Structure needs cleaning

+    return EFI_VOLUME_CORRUPTED;

+

+  case  -89: // EDESTADDRREQ        Destination address required

+  case -107: // ENOTCONN            Transport endpoint is not connected

+    return EFI_NOT_STARTED;

+

+  default:

+    break;

+  }

+

+  return EFI_DEVICE_ERROR;

+}