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| author | Anthony Harivel <aharivel@redhat.com> | 2024-05-22 17:34:50 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2024-07-22 13:47:41 +0200 |
| commit | 95fa0c79a04f3ebebb9f3b68cc05b4b8082b5444 (patch) | |
| tree | 5d3aad1d136fa89c45036b626434832fba82c120 /io | |
| parent | 13be929aff804581b21e69087a9caf3698fd5c3c (diff) | |
| download | qemu-95fa0c79a04f3ebebb9f3b68cc05b4b8082b5444.zip qemu-95fa0c79a04f3ebebb9f3b68cc05b4b8082b5444.tar.gz qemu-95fa0c79a04f3ebebb9f3b68cc05b4b8082b5444.tar.bz2 | |
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')
| -rw-r--r-- | io/channel-socket.c | 28 | ||||
| -rw-r--r-- | io/channel.c | 13 |
2 files changed, 41 insertions, 0 deletions
diff --git a/io/channel-socket.c b/io/channel-socket.c index 3a899b0..608bcf0 100644 --- a/io/channel-socket.c +++ b/io/channel-socket.c @@ -841,6 +841,33 @@ qio_channel_socket_set_cork(QIOChannel *ioc, socket_set_cork(sioc->fd, v); } +static int +qio_channel_socket_get_peerpid(QIOChannel *ioc, + unsigned int *pid, + Error **errp) +{ +#ifdef CONFIG_LINUX + QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc); + Error *err = NULL; + socklen_t len = sizeof(struct ucred); + + struct ucred cred; + if (getsockopt(sioc->fd, + SOL_SOCKET, SO_PEERCRED, + &cred, &len) == -1) { + error_setg_errno(&err, errno, "Unable to get peer credentials"); + error_propagate(errp, err); + *pid = -1; + return -1; + } + *pid = (unsigned int)cred.pid; + return 0; +#else + error_setg(errp, "Unsupported feature"); + *pid = -1; + return -1; +#endif +} static int qio_channel_socket_close(QIOChannel *ioc, @@ -938,6 +965,7 @@ static void qio_channel_socket_class_init(ObjectClass *klass, #ifdef QEMU_MSG_ZEROCOPY ioc_klass->io_flush = qio_channel_socket_flush; #endif + ioc_klass->io_peerpid = qio_channel_socket_get_peerpid; } static const TypeInfo qio_channel_socket_info = { diff --git a/io/channel.c b/io/channel.c index a1f12f8..e3f17c2 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, |