qemu/hw/9pfs
Christian Schoenebeck e5c88e2264 9pfs: fix wrong encoding of rdev field in Rgetattr on macOS
The 'rdev' field in 9p reponse 'Rgetattr' is of type dev_t,
which is actually a system dependant type and therefore both the
size and encoding of dev_t differ between macOS and Linux.

So far we have sent 'rdev' to guest in host's dev_t format as-is,
which caused devices to appear with wrong device numbers on
guests running on macOS hosts, eventually leading to various
misbehaviours on guest in conjunction with device files.

This patch fixes this issue by converting the device number from
host's dev_t format to Linux dev_t format. As 9p request
'Tgettattr' is exclusive to protocol version 9p2000.L, it should
be fair to assume that 'rdev' field is assumed to be in Linux dev_t
format by client as well.

Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Link: https://lore.kernel.org/qemu-devel/20220421093056.5ab1e7ed@bahia/
Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Akihiko Odaki <akihiko.odaki@gmail.com>
Message-Id: <b3a430c2c382ba69a7405e04c0b090ab0d86f17e.1651228001.git.qemu_oss@crudebyte.com>
2022-05-01 14:07:03 +02:00
..
9p-local.c 9p: darwin: Implement compatibility for mknodat 2022-03-07 11:49:31 +01:00
9p-local.h 9pfs: local: open/opendir: don't follow symlinks 2017-02-28 11:21:15 +01:00
9p-posix-acl.c 9pfs: add link to 9p developer docs 2021-07-05 13:03:16 +02:00
9p-proxy.c Remove qemu-common.h include from most units 2022-04-06 14:31:55 +02:00
9p-proxy.h Clean up ill-advised or unusual header guards 2016-07-12 16:20:46 +02:00
9p-synth.c 9pfs: fix inode sequencing in 'synth' driver 2022-04-30 13:11:47 +02:00
9p-synth.h 9pfs: Fix segfault in do_readdir_many caused by struct dirent overread 2022-02-17 16:57:58 +01:00
9p-util-darwin.c 9pfs: fix qemu_mknodat(S_IFSOCK) on macOS 2022-05-01 14:02:08 +02:00
9p-util-linux.c 9p: darwin: Implement compatibility for mknodat 2022-03-07 11:49:31 +01:00
9p-util.h 9pfs: fix wrong encoding of rdev field in Rgetattr on macOS 2022-05-01 14:07:03 +02:00
9p-xattr-user.c 9pfs: add link to 9p developer docs 2021-07-05 13:03:16 +02:00
9p-xattr.c 9pfs: add link to 9p developer docs 2021-07-05 13:03:16 +02:00
9p-xattr.h 9pfs: fix XattrOperations typedef 2018-01-08 11:18:22 +01:00
9p.c 9pfs: fix wrong encoding of rdev field in Rgetattr on macOS 2022-05-01 14:07:03 +02:00
9p.h 9p: move P9_XATTR_SIZE_MAX from 9p.h to 9p.c 2022-04-01 13:06:07 +02:00
codir.c 9pfs: Use g_new() & friends where that makes obvious sense 2022-03-21 15:44:44 +01:00
cofile.c 9pfs: add link to 9p developer docs 2021-07-05 13:03:16 +02:00
cofs.c 9pfs: add link to 9p developer docs 2021-07-05 13:03:16 +02:00
coth.c 9pfs: add link to 9p developer docs 2021-07-05 13:03:16 +02:00
coth.h 9pfs/coth.h: drop Doxygen format on v9fs_co_run_in_worker() 2022-03-07 11:49:31 +01:00
coxattr.c 9pfs: add link to 9p developer docs 2021-07-05 13:03:16 +02:00
Kconfig hw/9pfs: Fix Kconfig dependency problem between 9pfs and Xen 2020-11-05 15:21:11 +01:00
meson.build 9p: darwin: *xattr_nofollow implementations 2022-03-07 11:49:31 +01:00
trace-events docs: fix references to docs/devel/tracing.rst 2021-06-02 06:51:09 +02:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
virtio-9p-device.c 9pfs: add link to 9p developer docs 2021-07-05 13:03:16 +02:00
virtio-9p.h Use OBJECT_DECLARE_SIMPLE_TYPE when possible 2020-09-18 14:12:32 -04:00
xen-9p-backend.c 9pfs: add link to 9p developer docs 2021-07-05 13:03:16 +02:00
xen-9pfs.h xen: Import other xen/io/*.h 2019-06-24 10:42:30 +01:00