diff options
| author | Christian Schoenebeck <qemu_oss@crudebyte.com> | 2022-04-29 12:25:15 +0200 |
|---|---|---|
| committer | Christian Schoenebeck <qemu_oss@crudebyte.com> | 2022-05-01 14:07:03 +0200 |
| commit | e5c88e2264ebd0bfe35b347b8cdca1e3af784d84 (patch) | |
| tree | 343ac4ec0ca40c0cab19b32c0abc1c16ce1bb5f0 /hw/9pfs/9p.c | |
| parent | 055ab89327bab83f1bd07e9de07f7628643d3d8d (diff) | |
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>
Diffstat (limited to 'hw/9pfs/9p.c')
| -rw-r--r-- | hw/9pfs/9p.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/9pfs/9p.c b/hw/9pfs/9p.c index 225f31fc31..4a296a0b94 100644 --- a/hw/9pfs/9p.c +++ b/hw/9pfs/9p.c @@ -1327,7 +1327,7 @@ static int stat_to_v9stat_dotl(V9fsPDU *pdu, const struct stat *stbuf, v9lstat->st_nlink = stbuf->st_nlink; v9lstat->st_uid = stbuf->st_uid; v9lstat->st_gid = stbuf->st_gid; - v9lstat->st_rdev = stbuf->st_rdev; + v9lstat->st_rdev = host_dev_to_dotl_dev(stbuf->st_rdev); v9lstat->st_size = stbuf->st_size; v9lstat->st_blksize = stat_to_iounit(pdu, stbuf); v9lstat->st_blocks = stbuf->st_blocks; |