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alistair23-linux/fs/afs/misc.c
Linus Torvalds 8dda9957e3 AFS development 
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Merge tag 'afs-next-20190628' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

Pull afs updates from David Howells:
 "A set of minor changes for AFS:

   - Remove an unnecessary check in afs_unlink()

   - Add a tracepoint for tracking callback management

   - Add a tracepoint for afs_server object usage

   - Use struct_size()

   - Add mappings for AFS UAE abort codes to Linux error codes, using
     symbolic names rather than hex numbers in the .c file"

* tag 'afs-next-20190628' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
  afs: Add support for the UAE error table
  fs/afs: use struct_size() in kzalloc()
  afs: Trace afs_server usage
  afs: Add some callback management tracepoints
  afs: afs_unlink() doesn't need to check dentry->d_inode
2019-07-10 20:55:33 -07:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/* miscellaneous bits
*
* Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/errno.h>
#include "internal.h"
#include "afs_fs.h"
#include "protocol_uae.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 */
case UAEPERM: return -EPERM;
case UAENOENT: return -ENOENT;
case UAEACCES: return -EACCES;
case UAEBUSY: return -EBUSY;
case UAEEXIST: return -EEXIST;
case UAENOTDIR: return -ENOTDIR;
case UAEISDIR: return -EISDIR;
case UAEFBIG: return -EFBIG;
case UAENOSPC: return -ENOSPC;
case UAEROFS: return -EROFS;
case UAEMLINK: return -EMLINK;
case UAEDEADLK: return -EDEADLK;
case UAENAMETOOLONG: return -ENAMETOOLONG;
case UAENOLCK: return -ENOLCK;
case UAENOTEMPTY: return -ENOTEMPTY;
case UAELOOP: return -ELOOP;
case UAENOMEDIUM: return -ENOMEDIUM;
case UAEDQUOT: 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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