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2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/afs/misc.c
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@@ -1,12 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /* miscellaneous bits
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  *
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  * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
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  * Written by David Howells (dhowells@redhat.com)
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License
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- * as published by the Free Software Foundation; either version
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- * 2 of the License, or (at your option) any later version.
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  */
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 #include <linux/kernel.h>
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@@ -14,6 +10,7 @@
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 #include <linux/errno.h>
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 #include "internal.h"
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 #include "afs_fs.h"
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+#include "protocol_uae.h"
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14
 
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 /*
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  * convert an AFS abort code to a Linux error number
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@@ -69,34 +66,27 @@
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 	case AFSVL_PERM:		return -EACCES;
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 	case AFSVL_NOMEM:		return -EREMOTEIO;
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-		/* Unified AFS error table; ET "uae" == 0x2f6df00 */
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-	case 0x2f6df00:		return -EPERM;
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-	case 0x2f6df01:		return -ENOENT;
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-	case 0x2f6df04:		return -EIO;
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-	case 0x2f6df0a:		return -EAGAIN;
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-	case 0x2f6df0b:		return -ENOMEM;
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-	case 0x2f6df0c:		return -EACCES;
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-	case 0x2f6df0f:		return -EBUSY;
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-	case 0x2f6df10:		return -EEXIST;
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-	case 0x2f6df11:		return -EXDEV;
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-	case 0x2f6df12:		return -ENODEV;
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-	case 0x2f6df13:		return -ENOTDIR;
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-	case 0x2f6df14:		return -EISDIR;
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-	case 0x2f6df15:		return -EINVAL;
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-	case 0x2f6df1a:		return -EFBIG;
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-	case 0x2f6df1b:		return -ENOSPC;
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-	case 0x2f6df1d:		return -EROFS;
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-	case 0x2f6df1e:		return -EMLINK;
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-	case 0x2f6df20:		return -EDOM;
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-	case 0x2f6df21:		return -ERANGE;
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-	case 0x2f6df22:		return -EDEADLK;
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-	case 0x2f6df23:		return -ENAMETOOLONG;
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-	case 0x2f6df24:		return -ENOLCK;
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-	case 0x2f6df26:		return -ENOTEMPTY;
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-	case 0x2f6df28:		return -EWOULDBLOCK;
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-	case 0x2f6df69:		return -ENOTCONN;
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-	case 0x2f6df6c:		return -ETIMEDOUT;
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-	case 0x2f6df78:		return -EDQUOT;
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+		/* Unified AFS error table */
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+	case UAEPERM:			return -EPERM;
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+	case UAENOENT:			return -ENOENT;
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+	case UAEAGAIN:			return -EAGAIN;
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+	case UAEACCES:			return -EACCES;
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+	case UAEBUSY:			return -EBUSY;
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+	case UAEEXIST:			return -EEXIST;
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+	case UAENOTDIR:			return -ENOTDIR;
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+	case UAEISDIR:			return -EISDIR;
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+	case UAEFBIG:			return -EFBIG;
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+	case UAENOSPC:			return -ENOSPC;
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+	case UAEROFS:			return -EROFS;
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+	case UAEMLINK:			return -EMLINK;
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+	case UAEDEADLK:			return -EDEADLK;
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+	case UAENAMETOOLONG:		return -ENAMETOOLONG;
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+	case UAENOLCK:			return -ENOLCK;
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+	case UAENOTEMPTY:		return -ENOTEMPTY;
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+	case UAELOOP:			return -ELOOP;
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+	case UAEOVERFLOW:		return -EOVERFLOW;
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+	case UAENOMEDIUM:		return -ENOMEDIUM;
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+	case UAEDQUOT:			return -EDQUOT;
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 		/* RXKAD abort codes; from include/rxrpc/packet.h.  ET "RXK" == 0x1260B00 */
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 	case RXKADINCONSISTENCY: return -EPROTO;
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@@ -118,3 +108,64 @@
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 	default:		return -EREMOTEIO;
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 	}
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 }
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+
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+/*
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+ * Select the error to report from a set of errors.
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+ */
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+void afs_prioritise_error(struct afs_error *e, int error, u32 abort_code)
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+{
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+	switch (error) {
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+	case 0:
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+		return;
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+	default:
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+		if (e->error == -ETIMEDOUT ||
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+		    e->error == -ETIME)
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+			return;
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+		fallthrough;
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+	case -ETIMEDOUT:
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+	case -ETIME:
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+		if (e->error == -ENOMEM ||
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+		    e->error == -ENONET)
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+			return;
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+		fallthrough;
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+	case -ENOMEM:
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+	case -ENONET:
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+		if (e->error == -ERFKILL)
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+			return;
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+		fallthrough;
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+	case -ERFKILL:
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+		if (e->error == -EADDRNOTAVAIL)
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+			return;
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+		fallthrough;
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+	case -EADDRNOTAVAIL:
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+		if (e->error == -ENETUNREACH)
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+			return;
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+		fallthrough;
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+	case -ENETUNREACH:
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+		if (e->error == -EHOSTUNREACH)
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+			return;
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+		fallthrough;
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+	case -EHOSTUNREACH:
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+		if (e->error == -EHOSTDOWN)
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+			return;
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+		fallthrough;
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+	case -EHOSTDOWN:
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+		if (e->error == -ECONNREFUSED)
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+			return;
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+		fallthrough;
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+	case -ECONNREFUSED:
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+		if (e->error == -ECONNRESET)
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+			return;
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+		fallthrough;
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+	case -ECONNRESET: /* Responded, but call expired. */
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+		if (e->responded)
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+			return;
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+		e->error = error;
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+		return;
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+
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+	case -ECONNABORTED:
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+		e->responded = true;
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+		e->error = afs_abort_to_error(abort_code);
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+		return;
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+	}
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+}