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linux/fs/afs/misc.c
Gustavo A. R. Silva e690c9e3f4 afs: Mark expected switch fall-throughs 
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Notice that in many cases I placed a /* Fall through */ comment
at the bottom of the case, which what GCC is expecting to find.

In other cases I had to tweak a bit the format of the comments.

This patch suppresses ALL missing-break-in-switch false positives
in fs/afs

Addresses-Coverity-ID: 115042 ("Missing break in switch")
Addresses-Coverity-ID: 115043 ("Missing break in switch")
Addresses-Coverity-ID: 115045 ("Missing break in switch")
Addresses-Coverity-ID: 1357430 ("Missing break in switch")
Addresses-Coverity-ID: 115047 ("Missing break in switch")
Addresses-Coverity-ID: 115050 ("Missing break in switch")
Addresses-Coverity-ID: 115051 ("Missing break in switch")
Addresses-Coverity-ID: 1467806 ("Missing break in switch")
Addresses-Coverity-ID: 1467807 ("Missing break in switch")
Addresses-Coverity-ID: 1467811 ("Missing break in switch")
Addresses-Coverity-ID: 115041 ("Missing break in switch")
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
2019-04-08 18:35:56 -05:00

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5.1 KiB
C
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/* miscellaneous bits
*
* Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/errno.h>
#include "internal.h"
#include "afs_fs.h"
/*
* convert an AFS abort code to a Linux error number
*/
int afs_abort_to_error(u32 abort_code)
{
switch (abort_code) {
/* Low errno codes inserted into abort namespace */
case 13: return -EACCES;
case 27: return -EFBIG;
case 30: return -EROFS;
/* VICE "special error" codes; 101 - 111 */
case VSALVAGE: return -EIO;
case VNOVNODE: return -ENOENT;
case VNOVOL: return -ENOMEDIUM;
case VVOLEXISTS: return -EEXIST;
case VNOSERVICE: return -EIO;
case VOFFLINE: return -ENOENT;
case VONLINE: return -EEXIST;
case VDISKFULL: return -ENOSPC;
case VOVERQUOTA: return -EDQUOT;
case VBUSY: return -EBUSY;
case VMOVED: return -ENXIO;
/* Volume Location server errors */
case AFSVL_IDEXIST: return -EEXIST;
case AFSVL_IO: return -EREMOTEIO;
case AFSVL_NAMEEXIST: return -EEXIST;
case AFSVL_CREATEFAIL: return -EREMOTEIO;
case AFSVL_NOENT: return -ENOMEDIUM;
case AFSVL_EMPTY: return -ENOMEDIUM;
case AFSVL_ENTDELETED: return -ENOMEDIUM;
case AFSVL_BADNAME: return -EINVAL;
case AFSVL_BADINDEX: return -EINVAL;
case AFSVL_BADVOLTYPE: return -EINVAL;
case AFSVL_BADSERVER: return -EINVAL;
case AFSVL_BADPARTITION: return -EINVAL;
case AFSVL_REPSFULL: return -EFBIG;
case AFSVL_NOREPSERVER: return -ENOENT;
case AFSVL_DUPREPSERVER: return -EEXIST;
case AFSVL_RWNOTFOUND: return -ENOENT;
case AFSVL_BADREFCOUNT: return -EINVAL;
case AFSVL_SIZEEXCEEDED: return -EINVAL;
case AFSVL_BADENTRY: return -EINVAL;
case AFSVL_BADVOLIDBUMP: return -EINVAL;
case AFSVL_IDALREADYHASHED: return -EINVAL;
case AFSVL_ENTRYLOCKED: return -EBUSY;
case AFSVL_BADVOLOPER: return -EBADRQC;
case AFSVL_BADRELLOCKTYPE: return -EINVAL;
case AFSVL_RERELEASE: return -EREMOTEIO;
case AFSVL_BADSERVERFLAG: return -EINVAL;
case AFSVL_PERM: return -EACCES;
case AFSVL_NOMEM: return -EREMOTEIO;
/* Unified AFS error table; ET "uae" == 0x2f6df00 */
case 0x2f6df00: return -EPERM;
case 0x2f6df01: return -ENOENT;
case 0x2f6df04: return -EIO;
case 0x2f6df0a: return -EAGAIN;
case 0x2f6df0b: return -ENOMEM;
case 0x2f6df0c: return -EACCES;
case 0x2f6df0f: return -EBUSY;
case 0x2f6df10: return -EEXIST;
case 0x2f6df11: return -EXDEV;
case 0x2f6df12: return -ENODEV;
case 0x2f6df13: return -ENOTDIR;
case 0x2f6df14: return -EISDIR;
case 0x2f6df15: return -EINVAL;
case 0x2f6df1a: return -EFBIG;
case 0x2f6df1b: return -ENOSPC;
case 0x2f6df1d: return -EROFS;
case 0x2f6df1e: return -EMLINK;
case 0x2f6df20: return -EDOM;
case 0x2f6df21: return -ERANGE;
case 0x2f6df22: return -EDEADLK;
case 0x2f6df23: return -ENAMETOOLONG;
case 0x2f6df24: return -ENOLCK;
case 0x2f6df26: return -ENOTEMPTY;
case 0x2f6df28: return -EWOULDBLOCK;
case 0x2f6df69: return -ENOTCONN;
case 0x2f6df6c: return -ETIMEDOUT;
case 0x2f6df78: return -EDQUOT;
/* RXKAD abort codes; from include/rxrpc/packet.h. ET "RXK" == 0x1260B00 */
case RXKADINCONSISTENCY: return -EPROTO;
case RXKADPACKETSHORT: return -EPROTO;
case RXKADLEVELFAIL: return -EKEYREJECTED;
case RXKADTICKETLEN: return -EKEYREJECTED;
case RXKADOUTOFSEQUENCE: return -EPROTO;
case RXKADNOAUTH: return -EKEYREJECTED;
case RXKADBADKEY: return -EKEYREJECTED;
case RXKADBADTICKET: return -EKEYREJECTED;
case RXKADUNKNOWNKEY: return -EKEYREJECTED;
case RXKADEXPIRED: return -EKEYEXPIRED;
case RXKADSEALEDINCON: return -EKEYREJECTED;
case RXKADDATALEN: return -EKEYREJECTED;
case RXKADILLEGALLEVEL: return -EKEYREJECTED;
case RXGEN_OPCODE: return -ENOTSUPP;
default: return -EREMOTEIO;
}
}
/*
* Select the error to report from a set of errors.
*/
void afs_prioritise_error(struct afs_error *e, int error, u32 abort_code)
{
switch (error) {
case 0:
return;
default:
if (e->error == -ETIMEDOUT ||
e->error == -ETIME)
return;
/* Fall through */
case -ETIMEDOUT:
case -ETIME:
if (e->error == -ENOMEM ||
e->error == -ENONET)
return;
/* Fall through */
case -ENOMEM:
case -ENONET:
if (e->error == -ERFKILL)
return;
/* Fall through */
case -ERFKILL:
if (e->error == -EADDRNOTAVAIL)
return;
/* Fall through */
case -EADDRNOTAVAIL:
if (e->error == -ENETUNREACH)
return;
/* Fall through */
case -ENETUNREACH:
if (e->error == -EHOSTUNREACH)
return;
/* Fall through */
case -EHOSTUNREACH:
if (e->error == -EHOSTDOWN)
return;
/* Fall through */
case -EHOSTDOWN:
if (e->error == -ECONNREFUSED)
return;
/* Fall through */
case -ECONNREFUSED:
if (e->error == -ECONNRESET)
return;
/* Fall through */
case -ECONNRESET: /* Responded, but call expired. */
if (e->responded)
return;
e->error = error;
return;
case -ECONNABORTED:
e->responded = true;
e->error = afs_abort_to_error(abort_code);
return;
}
}
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