diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2009-11-07 07:52:32 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-11-07 07:52:32 +0100 |
| commit | 50857e2a59d8beddc6bb76137df026d67f30d5ca (patch) | |
| tree | 7b6d244ad6fa07ff199c7d1436750d535b6b8dcd /fs | |
| parent | compat: add struct compat_ifreq etc to compat.h (diff) | |
| download | linux-50857e2a59d8beddc6bb76137df026d67f30d5ca.tar.xz linux-50857e2a59d8beddc6bb76137df026d67f30d5ca.zip | |
net/tun: handle compat_ioctl directly
The tun driver is the only code in the kernel that operates
on a character device with struct ifreq. Change the driver
to handle the conversion itself so we can contain the
remaining ifreq handling in the socket layer.
This also fixes a bug in the handling of invalid ioctl
numbers on an unbound tun device. The driver treats this
as a TUNSETIFF in native mode, but there is no way for
the generic compat_ioctl() function to emulate this
behaviour. Possibly the driver was only doing this
accidentally anyway, but if any code relies on this
misfeature, it now also works in compat mode.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/compat_ioctl.c | 20 |
1 files changed, 0 insertions, 20 deletions
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c index f91fd51b32e3..c562e9a4da70 100644 --- a/fs/compat_ioctl.c +++ b/fs/compat_ioctl.c @@ -539,12 +539,6 @@ static int dev_ifsioc(unsigned int fd, unsigned int cmd, unsigned long arg) set_fs (old_fs); if (!err) { switch (cmd) { - /* TUNSETIFF is defined as _IOW, it should be _IORW - * as the data is copied back to user space, but that - * cannot be fixed without breaking all existing apps. - */ - case TUNSETIFF: - case TUNGETIFF: case SIOCGIFFLAGS: case SIOCGIFMETRIC: case SIOCGIFMTU: @@ -1979,18 +1973,6 @@ COMPATIBLE_IOCTL(SCSI_IOCTL_SEND_COMMAND) COMPATIBLE_IOCTL(SCSI_IOCTL_PROBE_HOST) COMPATIBLE_IOCTL(SCSI_IOCTL_GET_PCI) #endif -/* Big T */ -COMPATIBLE_IOCTL(TUNSETNOCSUM) -COMPATIBLE_IOCTL(TUNSETDEBUG) -COMPATIBLE_IOCTL(TUNSETPERSIST) -COMPATIBLE_IOCTL(TUNSETOWNER) -COMPATIBLE_IOCTL(TUNSETLINK) -COMPATIBLE_IOCTL(TUNSETGROUP) -COMPATIBLE_IOCTL(TUNGETFEATURES) -COMPATIBLE_IOCTL(TUNSETOFFLOAD) -COMPATIBLE_IOCTL(TUNSETTXFILTER) -COMPATIBLE_IOCTL(TUNGETSNDBUF) -COMPATIBLE_IOCTL(TUNSETSNDBUF) /* Big V */ COMPATIBLE_IOCTL(VT_SETMODE) COMPATIBLE_IOCTL(VT_GETMODE) @@ -2571,8 +2553,6 @@ HANDLE_IOCTL(SIOCSIFPFLAGS, dev_ifsioc) HANDLE_IOCTL(SIOCGIFPFLAGS, dev_ifsioc) HANDLE_IOCTL(SIOCGIFTXQLEN, dev_ifsioc) HANDLE_IOCTL(SIOCSIFTXQLEN, dev_ifsioc) -HANDLE_IOCTL(TUNSETIFF, dev_ifsioc) -HANDLE_IOCTL(TUNGETIFF, dev_ifsioc) HANDLE_IOCTL(SIOCETHTOOL, ethtool_ioctl) HANDLE_IOCTL(SIOCBONDENSLAVE, bond_ioctl) HANDLE_IOCTL(SIOCBONDRELEASE, bond_ioctl) |