cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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misc.c (4840B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/* miscellaneous bits
      3 *
      4 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
      5 * Written by David Howells (dhowells@redhat.com)
      6 */
      7
      8#include <linux/kernel.h>
      9#include <linux/module.h>
     10#include <linux/errno.h>
     11#include "internal.h"
     12#include "afs_fs.h"
     13#include "protocol_uae.h"
     14
     15/*
     16 * convert an AFS abort code to a Linux error number
     17 */
     18int afs_abort_to_error(u32 abort_code)
     19{
     20	switch (abort_code) {
     21		/* Low errno codes inserted into abort namespace */
     22	case 13:		return -EACCES;
     23	case 27:		return -EFBIG;
     24	case 30:		return -EROFS;
     25
     26		/* VICE "special error" codes; 101 - 111 */
     27	case VSALVAGE:		return -EIO;
     28	case VNOVNODE:		return -ENOENT;
     29	case VNOVOL:		return -ENOMEDIUM;
     30	case VVOLEXISTS:	return -EEXIST;
     31	case VNOSERVICE:	return -EIO;
     32	case VOFFLINE:		return -ENOENT;
     33	case VONLINE:		return -EEXIST;
     34	case VDISKFULL:		return -ENOSPC;
     35	case VOVERQUOTA:	return -EDQUOT;
     36	case VBUSY:		return -EBUSY;
     37	case VMOVED:		return -ENXIO;
     38
     39		/* Volume Location server errors */
     40	case AFSVL_IDEXIST:		return -EEXIST;
     41	case AFSVL_IO:			return -EREMOTEIO;
     42	case AFSVL_NAMEEXIST:		return -EEXIST;
     43	case AFSVL_CREATEFAIL:		return -EREMOTEIO;
     44	case AFSVL_NOENT:		return -ENOMEDIUM;
     45	case AFSVL_EMPTY:		return -ENOMEDIUM;
     46	case AFSVL_ENTDELETED:		return -ENOMEDIUM;
     47	case AFSVL_BADNAME:		return -EINVAL;
     48	case AFSVL_BADINDEX:		return -EINVAL;
     49	case AFSVL_BADVOLTYPE:		return -EINVAL;
     50	case AFSVL_BADSERVER:		return -EINVAL;
     51	case AFSVL_BADPARTITION:	return -EINVAL;
     52	case AFSVL_REPSFULL:		return -EFBIG;
     53	case AFSVL_NOREPSERVER:		return -ENOENT;
     54	case AFSVL_DUPREPSERVER:	return -EEXIST;
     55	case AFSVL_RWNOTFOUND:		return -ENOENT;
     56	case AFSVL_BADREFCOUNT:		return -EINVAL;
     57	case AFSVL_SIZEEXCEEDED:	return -EINVAL;
     58	case AFSVL_BADENTRY:		return -EINVAL;
     59	case AFSVL_BADVOLIDBUMP:	return -EINVAL;
     60	case AFSVL_IDALREADYHASHED:	return -EINVAL;
     61	case AFSVL_ENTRYLOCKED:		return -EBUSY;
     62	case AFSVL_BADVOLOPER:		return -EBADRQC;
     63	case AFSVL_BADRELLOCKTYPE:	return -EINVAL;
     64	case AFSVL_RERELEASE:		return -EREMOTEIO;
     65	case AFSVL_BADSERVERFLAG:	return -EINVAL;
     66	case AFSVL_PERM:		return -EACCES;
     67	case AFSVL_NOMEM:		return -EREMOTEIO;
     68
     69		/* Unified AFS error table */
     70	case UAEPERM:			return -EPERM;
     71	case UAENOENT:			return -ENOENT;
     72	case UAEACCES:			return -EACCES;
     73	case UAEBUSY:			return -EBUSY;
     74	case UAEEXIST:			return -EEXIST;
     75	case UAENOTDIR:			return -ENOTDIR;
     76	case UAEISDIR:			return -EISDIR;
     77	case UAEFBIG:			return -EFBIG;
     78	case UAENOSPC:			return -ENOSPC;
     79	case UAEROFS:			return -EROFS;
     80	case UAEMLINK:			return -EMLINK;
     81	case UAEDEADLK:			return -EDEADLK;
     82	case UAENAMETOOLONG:		return -ENAMETOOLONG;
     83	case UAENOLCK:			return -ENOLCK;
     84	case UAENOTEMPTY:		return -ENOTEMPTY;
     85	case UAELOOP:			return -ELOOP;
     86	case UAEOVERFLOW:		return -EOVERFLOW;
     87	case UAENOMEDIUM:		return -ENOMEDIUM;
     88	case UAEDQUOT:			return -EDQUOT;
     89
     90		/* RXKAD abort codes; from include/rxrpc/packet.h.  ET "RXK" == 0x1260B00 */
     91	case RXKADINCONSISTENCY: return -EPROTO;
     92	case RXKADPACKETSHORT:	return -EPROTO;
     93	case RXKADLEVELFAIL:	return -EKEYREJECTED;
     94	case RXKADTICKETLEN:	return -EKEYREJECTED;
     95	case RXKADOUTOFSEQUENCE: return -EPROTO;
     96	case RXKADNOAUTH:	return -EKEYREJECTED;
     97	case RXKADBADKEY:	return -EKEYREJECTED;
     98	case RXKADBADTICKET:	return -EKEYREJECTED;
     99	case RXKADUNKNOWNKEY:	return -EKEYREJECTED;
    100	case RXKADEXPIRED:	return -EKEYEXPIRED;
    101	case RXKADSEALEDINCON:	return -EKEYREJECTED;
    102	case RXKADDATALEN:	return -EKEYREJECTED;
    103	case RXKADILLEGALLEVEL:	return -EKEYREJECTED;
    104
    105	case RXGEN_OPCODE:	return -ENOTSUPP;
    106
    107	default:		return -EREMOTEIO;
    108	}
    109}
    110
    111/*
    112 * Select the error to report from a set of errors.
    113 */
    114void afs_prioritise_error(struct afs_error *e, int error, u32 abort_code)
    115{
    116	switch (error) {
    117	case 0:
    118		return;
    119	default:
    120		if (e->error == -ETIMEDOUT ||
    121		    e->error == -ETIME)
    122			return;
    123		fallthrough;
    124	case -ETIMEDOUT:
    125	case -ETIME:
    126		if (e->error == -ENOMEM ||
    127		    e->error == -ENONET)
    128			return;
    129		fallthrough;
    130	case -ENOMEM:
    131	case -ENONET:
    132		if (e->error == -ERFKILL)
    133			return;
    134		fallthrough;
    135	case -ERFKILL:
    136		if (e->error == -EADDRNOTAVAIL)
    137			return;
    138		fallthrough;
    139	case -EADDRNOTAVAIL:
    140		if (e->error == -ENETUNREACH)
    141			return;
    142		fallthrough;
    143	case -ENETUNREACH:
    144		if (e->error == -EHOSTUNREACH)
    145			return;
    146		fallthrough;
    147	case -EHOSTUNREACH:
    148		if (e->error == -EHOSTDOWN)
    149			return;
    150		fallthrough;
    151	case -EHOSTDOWN:
    152		if (e->error == -ECONNREFUSED)
    153			return;
    154		fallthrough;
    155	case -ECONNREFUSED:
    156		if (e->error == -ECONNRESET)
    157			return;
    158		fallthrough;
    159	case -ECONNRESET: /* Responded, but call expired. */
    160		if (e->responded)
    161			return;
    162		e->error = error;
    163		return;
    164
    165	case -ECONNABORTED:
    166		error = afs_abort_to_error(abort_code);
    167		fallthrough;
    168	case -ENETRESET: /* Responded, but we seem to have changed address */
    169		e->responded = true;
    170		e->error = error;
    171		return;
    172	}
    173}