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authorAnthony Harivel <aharivel@redhat.com>2024-05-22 17:34:50 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2024-07-22 13:47:41 +0200
commit95fa0c79a04f3ebebb9f3b68cc05b4b8082b5444 (patch)
tree5d3aad1d136fa89c45036b626434832fba82c120 /io/channel.c
parent13be929aff804581b21e69087a9caf3698fd5c3c (diff)
downloadfocaccia-qemu-95fa0c79a04f3ebebb9f3b68cc05b4b8082b5444.tar.gz
focaccia-qemu-95fa0c79a04f3ebebb9f3b68cc05b4b8082b5444.zip
qio: add support for SO_PEERCRED for socket channel
The function qio_channel_get_peercred() returns a pointer to the
credentials of the peer process connected to this socket.

This credentials structure is defined in <sys/socket.h> as follows:

struct ucred {
	pid_t pid;    /* Process ID of the sending process */
	uid_t uid;    /* User ID of the sending process */
	gid_t gid;    /* Group ID of the sending process */
};

The use of this function is possible only for connected AF_UNIX stream
sockets and for AF_UNIX stream and datagram socket pairs.

On platform other than Linux, the function return 0.

Signed-off-by: Anthony Harivel <aharivel@redhat.com>
Link: https://lore.kernel.org/r/20240522153453.1230389-2-aharivel@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'io/channel.c')
-rw-r--r--io/channel.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/io/channel.c b/io/channel.c
index a1f12f8e90..e3f17c24a0 100644
--- a/io/channel.c
+++ b/io/channel.c
@@ -548,6 +548,19 @@ void qio_channel_set_cork(QIOChannel *ioc,
     }
 }
 
+int qio_channel_get_peerpid(QIOChannel *ioc,
+                             unsigned int *pid,
+                             Error **errp)
+{
+    QIOChannelClass *klass = QIO_CHANNEL_GET_CLASS(ioc);
+
+    if (!klass->io_peerpid) {
+        error_setg(errp, "Channel does not support peer pid");
+        return -1;
+    }
+    klass->io_peerpid(ioc, pid, errp);
+    return 0;
+}
 
 off_t qio_channel_io_seek(QIOChannel *ioc,
                           off_t offset,