linux-user: Translate errno in IP_RECVERR and IPV6_RECVERR

[PATCH] linux-user: Translate errno in IP_RECVERR and IPV6_RECVERR

Helge Deller posted 1 patch 1 month ago

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git fetch https://github.com/patchew-project/qemu tags/patchew/20260429173923.3402-1-deller@kernel.org

Maintainers: Laurent Vivier <laurent@vivier.eu>, Helge Deller <deller@gmx.de>, Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>

linux-user/syscall.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

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[PATCH] linux-user: Translate errno in IP_RECVERR and IPV6_RECVERR

Posted by Helge Deller 1 month ago

From: Helge Deller <deller@gmx.de>

Translate host error codes of IP_RECVERR and IPV6_RECVERR control messages to
target error codes before returning to the caller.
For example, this is important for architectures (e.g. hppa, alpha, sparc,
mips) on which the value of ECONNREFUSED is different to the value on a x86_64
host.

Resolves: https://gitlab.com/qemu-project/qemu/-/work_items/602
Signed-off-by: Helge Deller <deller@gmx.de>
---
 linux-user/syscall.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index d68edb7afd..d3d9fffb54 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -2008,7 +2008,8 @@ static inline abi_long host_to_target_cmsg(struct target_msghdr *target_msgh,
                     tgt_len != sizeof(struct errhdr_t)) {
                     goto unimplemented;
                 }
-                __put_user(errh->ee.ee_errno, &target_errh->ee.ee_errno);
+                __put_user(host_to_target_errno(errh->ee.ee_errno),
+                           &target_errh->ee.ee_errno);
                 __put_user(errh->ee.ee_origin, &target_errh->ee.ee_origin);
                 __put_user(errh->ee.ee_type,  &target_errh->ee.ee_type);
                 __put_user(errh->ee.ee_code, &target_errh->ee.ee_code);
@@ -2062,7 +2063,8 @@ static inline abi_long host_to_target_cmsg(struct target_msghdr *target_msgh,
                     tgt_len != sizeof(struct errhdr6_t)) {
                     goto unimplemented;
                 }
-                __put_user(errh->ee.ee_errno, &target_errh->ee.ee_errno);
+                __put_user(host_to_target_errno(errh->ee.ee_errno),
+                           &target_errh->ee.ee_errno);
                 __put_user(errh->ee.ee_origin, &target_errh->ee.ee_origin);
                 __put_user(errh->ee.ee_type,  &target_errh->ee.ee_type);
                 __put_user(errh->ee.ee_code, &target_errh->ee.ee_code);
-- 
2.53.0