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Pull XFS updates from Darrick Wong:
"For this release, we changed quite a few things.
Highlights:
- Fixed some long tail latency problems in the block allocator
- Removed some long deprecated (and for the past several years no-op)
mount options and ioctls
- Strengthened the extended attribute and directory verifiers
- Audited and fixed all the places where we could return EFSCORRUPTED
without logging anything
- Refactored the old SGI space allocation ioctls to make the
equivalent fallocate calls
- Fixed a race between fallocate and directio
- Fixed an integer overflow when files have more than a few
billion(!) extents
- Fixed a longstanding bug where quota accounting could be incorrect
when performing unwritten extent conversion on a freshly mounted fs
- Fixed various complaints in scrub about soft lockups and
unresponsiveness to signals
- De-vtable'd the directory handling code, which should make it
faster
- Converted to the new mount api, for better or for worse
- Cleaned up some memory leaks
and quite a lot of other smaller fixes and cleanups.
A more detailed summary:
- Fill out the build string
- Prevent inode fork extent count overflows
- Refactor the allocator to reduce long tail latency
- Rework incore log locking a little to reduce spinning
- Break up the xfs_iomap_begin functions into smaller more cohesive
parts
- Fix allocation alignment being dropped too early when the
allocation request is for more blocks than an AG is large
- Other small cleanups
- Clean up file buftarg retrieval helpers
- Hoist the resvsp and unresvsp ioctls to the vfs
- Remove the undocumented biosize mount option, since it has never
been mentioned as existing or supported on linux
- Clean up some of the mount option printing and parsing
- Enhance attr leaf verifier to check block structure
- Check dirent and attr names for invalid characters before passing
them to the vfs
- Refactor open-coded bmbt walking
- Fix a few places where we return EIO instead of EFSCORRUPTED after
failing metadata sanity checks
- Fix a synchronization problem between fallocate and aio dio
corrupting the file length
- Clean up various loose ends in the iomap and bmap code
- Convert to the new mount api
- Make sure we always log something when returning EFSCORRUPTED
- Fix some problems where long running scrub loops could trigger soft
lockup warnings and/or fail to exit due to fatal signals pending
- Fix various Coverity complaints
- Remove most of the function pointers from the directory code to
reduce indirection penalties
- Ensure that dquots are attached to the inode when performing
unwritten extent conversion after io
- Deuglify incore projid and crtime types
- Fix another AGI/AGF locking order deadlock when renaming
- Clean up some quota typedefs
- Remove the FSSETDM ioctls which haven't done anything in 20 years
- Fix some memory leaks when mounting the log fails
- Fix an underflow when updating an xattr leaf freemap
- Remove some trivial wrappers
- Report metadata corruption as an error, not a (potentially) fatal
assertion
- Clean up the dir/attr buffer mapping code
- Allow fatal signals to kill scrub during parent pointer checks"
* tag 'xfs-5.5-merge-16' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: (198 commits)
xfs: allow parent directory scans to be interrupted with fatal signals
xfs: remove the mappedbno argument to xfs_da_get_buf
xfs: remove the mappedbno argument to xfs_da_read_buf
xfs: split xfs_da3_node_read
xfs: remove the mappedbno argument to xfs_dir3_leafn_read
xfs: remove the mappedbno argument to xfs_dir3_leaf_read
xfs: remove the mappedbno argument to xfs_attr3_leaf_read
xfs: remove the mappedbno argument to xfs_da_reada_buf
xfs: improve the xfs_dabuf_map calling conventions
xfs: refactor xfs_dabuf_map
xfs: simplify mappedbno handling in xfs_da_{get,read}_buf
xfs: report corruption only as a regular error
xfs: Remove kmem_zone_free() wrapper
xfs: Remove kmem_zone_destroy() wrapper
xfs: Remove slab init wrappers
xfs: fix attr leaf header freemap.size underflow
xfs: fix some memory leaks in log recovery
xfs: fix another missing include
xfs: remove XFS_IOC_FSSETDM and XFS_IOC_FSSETDM_BY_HANDLE
xfs: remove duplicated include from xfs_dir2_data.c
...
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These use the same scheme as the pre-existing mapping of the XFS
RESVP ioctls to ->falloc, so just extend it and remove the XFS
implementation.
Signed-off-by: Christoph Hellwig <hch@lst.de>
[darrick: fix compile error on s390]
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
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SG_GET_REQUEST_TABLE is now the last ioctl command that needs a conversion
handler. This is only used in a single file, so the implementation should
be there.
I'm trying to simplify it in the process, to get rid of
the compat_alloc_user_space() and extra copy, by adding a
put_compat_request_table() function instead, which copies the data in
the right format to user space.
Cc: linux-scsi@vger.kernel.org
Cc: Doug Gilbert <dgilbert@interlog.com>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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All ppp commands that are not already handled in ppp_compat_ioctl()
are compatible, so they can now handled by calling the native
ppp_ioctl() directly.
Without CONFIG_BLOCK, the generic compat_ioctl table is now empty,
so add a check to avoid a build failure in the looking function for
that configuration.
Cc: netdev@vger.kernel.org
Cc: linux-ppp@vger.kernel.org
Cc: Paul Mackerras <paulus@samba.org>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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The ppp_idle structure is defined in terms of __kernel_time_t, which is
defined as 'long' on all architectures, and this usage is not affected
by the y2038 problem since it transports a time interval rather than an
absolute time.
However, the ppp user space defines the same structure as time_t, which
may be 64-bit wide on new libc versions even on 32-bit architectures.
It's easy enough to just handle both possible structure layouts on
all architectures, to deal with the possibility that a user space ppp
implementation comes with its own ppp_idle structure definition, as well
as to document the fact that the driver is y2038-safe.
Doing this also avoids the need for a special compat mode translation,
since 32-bit and 64-bit kernels now support the same interfaces. The old
32-bit structure is also available on native 64-bit architectures now,
but this is harmless.
Cc: netdev@vger.kernel.org
Cc: linux-ppp@vger.kernel.org
Cc: Paul Mackerras <paulus@samba.org>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Rather than using a compat_alloc_user_space() buffer, moving
this next to the native handler allows sharing most of
the code, leaving only the user copy portion distinct.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: netdev@vger.kernel.org
Cc: linux-ppp@vger.kernel.org
Cc: Paul Mackerras <paulus@samba.org>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Now that isdn4linux is gone, the is only one implementation of PPPIOCSPASS
and PPPIOCSACTIVE in ppp_generic.c, so this is where the compat_ioctl
support should be implemented.
The two commands are implemented in very similar ways, so introduce
new helpers to allow sharing between the two and between native and
compat mode.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
[arnd: rebased, and added changelog text]
Cc: netdev@vger.kernel.org
Cc: linux-ppp@vger.kernel.org
Cc: Paul Mackerras <paulus@samba.org>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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All users of this call are in socket or tty code, so handling
it there means we can avoid the table entry in fs/compat_ioctl.c.
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Eric Dumazet <edumazet@google.com>
Cc: netdev@vger.kernel.org
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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There are two code locations that implement the SG_IO ioctl: the old
sg.c driver, and the generic scsi_ioctl helper that is in turn used by
multiple drivers.
To eradicate the old compat_ioctl conversion handler for the SG_IO
command, I implement a readable pair of put_sg_io_hdr() /get_sg_io_hdr()
helper functions that can be used for both compat and native mode,
and then I call this from both drivers.
For the iovec handling, there is already a compat_import_iovec() function
that can simply be called in place of import_iovec().
To avoid having to pass the compat/native state through multiple
indirections, I mark the SG_IO command itself as compatible in
fs/compat_ioctl.c and use in_compat_syscall() to figure out where
we are called from.
As a side-effect of this, the sg.c driver now also accepts the 32-bit
sg_io_hdr format in compat mode using the read/write interface, not
just ioctl. This should improve compatiblity with old 32-bit binaries,
but it would break if any application intentionally passes the 64-bit
data structure in compat mode here.
Steffen Maier helped debug an issue in an earlier version of this patch.
Cc: Steffen Maier <maier@linux.ibm.com>
Cc: linux-scsi@vger.kernel.org
Cc: Doug Gilbert <dgilbert@interlog.com>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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All watchdog drivers implement the same set of ioctl commands, and
fortunately all of them are compatible between 32-bit and 64-bit
architectures.
Modern drivers always go through drivers/watchdog/wdt.c as an abstraction
layer, but older ones implement their own file_operations on a character
device for this.
Move the handling from fs/compat_ioctl.c into the individual drivers.
Note that most of the legacy drivers will never be used on 64-bit
hardware, because they are for an old 32-bit SoC implementation, but
doing them all at once is safer than trying to guess which ones do
or do not need the compat_ioctl handling.
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Remove the special case for FITRIM, and make file systems
handle that like all other ioctl commands with their own
handlers.
Cc: linux-ext4@vger.kernel.org
Cc: linux-f2fs-devel@lists.sourceforge.net
Cc: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Cc: linux-nilfs@vger.kernel.org
Cc: ocfs2-devel@oss.oracle.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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The last users are all gone, so let's remove the macro as well.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Commit aa98aa31987a ("md: move compat_ioctl handling into md.c")
already removed the COMPATIBLE_IOCTL() table entries and added
a complete implementation, but a few lines got left behind and
should also be removed here.
Cc: linux-raid@vger.kernel.org
Cc: Song Liu <song@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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The /dev/rawX implementation already handles these just fine, so
the entries in the table are not needed any more.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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The /proc/pci/ implementation already handles these just fine, so
the entries in the table are not needed any more.
Cc: linux-pci@vger.kernel.org
Cc: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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The joystick driver already handles these just fine, so
the entries in the table are not needed any more.
Cc: linux-input@vger.kernel.org
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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These are all handled by the random driver, so instead of listing
each ioctl, we can use the generic compat_ptr_ioctl() helper.
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Since commit 07d106d0a33d ("vfs: fix up ENOIOCTLCMD error handling"),
we don't warn about unhandled compat-ioctl command code any more, but
just return the same error that a native file descriptor returns when
there is no handler.
This means the IGNORE_IOCTL() annotations are completely useless and
can all be removed. TIOCSTART/TIOCSTOP and KDGHWCLK/KDSHWCLK fall into
the same category, but for some reason were listed as COMPATIBLE_IOCTL().
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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The SNDCTL_* and SOUND_* commands are the old OSS user interface.
I checked all the sound ioctl commands listed in fs/compat_ioctl.c
to see if we still need the translation handlers. Here is what I
found:
- sound/oss/ is (almost) gone from the kernel, this is what actually
needed all the translations
- The ALSA emulation for OSS correctly handles all compat_ioctl
commands already.
- sound/oss/dmasound/ is the last holdout of the original OSS code,
this is only used on arch/m68k, which has no 64-bit mode and
hence needs no compat handlers
- arch/um/drivers/hostaudio_kern.c may run in 64-bit mode with
32-bit x86 user space underneath it. This rare corner case is
the only one that still needs the compat handlers.
By adding a simple redirect of .compat_ioctl to .unlocked_ioctl in the
UML driver, we can remove all the COMPATIBLE_IOCTL() annotations without
a change in functionality. For completeness, I'm adding the same thing
to the dmasound file, knowing that it makes no difference.
The compat_ioctl list contains one comment about SNDCTL_DSP_MAPINBUF and
SNDCTL_DSP_MAPOUTBUF, which actually would need a translation handler
if implemented. However, the native implementation just returns -EINVAL,
so we don't care.
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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The two drivers implementing these both gained proper compat_ioctl()
handlers a long time ago with commits bb6c8d8fa9b5 ("HID: hiddev:
Add 32bit ioctl compatibilty") and ae5e49c79c05 ("HID: hidraw: add
compatibility ioctl() for 32-bit applications."), so the lists in
fs/compat_ioctl.c are no longer used.
It appears that the lists were also incomplete, so the translation
didn't actually work correctly when it was still in use.
Remove them as cleanup.
Cc: linux-bluetooth@vger.kernel.org
Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: Johan Hedberg <johan.hedberg@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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As of commit f0193d3ea73b ("change semantics of ldisc ->compat_ioctl()"),
all hciuart ioctl commands are handled correctly in the driver, and we
never need to go through the table here.
Cc: linux-bluetooth@vger.kernel.org
Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: Johan Hedberg <johan.hedberg@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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All these ioctl commands are compatible, so we can handle
them with a trivial wrapper in hci_sock.c and remove
the listing in fs/compat_ioctl.c.
A few of the commands pass integer arguments instead of
pointers, so for correctness skip the compat_ptr() conversion
here.
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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All these ioctl commands are compatible, so we can handle
them with a trivial wrapper in rfcomm/sock.c and remove
the listing in fs/compat_ioctl.c.
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Neither the old isdn4linux interface nor the newer mISDN stack
ever had working 32-bit compat mode as far as I can tell.
However, the CAPI stack has some ioctl commands that are
correctly listed in fs/compat_ioctl.c.
We can trivially move all of those into the corresponding
file that implement the native handlers by adding a compat_ioctl
redirect to that.
I did notice that treating CAPI_MANUFACTURER_CMD() as compatible
is broken, so I'm also adding a handler for that, realizing that
in all likelyhood, nobody is ever going to call it.
Cc: Karsten Keil <isdn@linux-pingi.de>
Cc: netdev@vger.kernel.org
Cc: isdn4linux@listserv.isdn4linux.de
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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These are two obscure ioctl commands, in a driver that only
has compatible commands, so just let the driver handle this
itself.
Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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MTIOCPOS and MTIOCGET are incompatible between 32-bit and 64-bit user
space, and traditionally have been translated in fs/compat_ioctl.c.
To get rid of that translation handler, move a corresponding
implementation into each of the four drivers implementing those commands.
The interesting part of that is now in a new linux/mtio.h header that
wraps the existing uapi/linux/mtio.h header and provides an abstraction
to let drivers handle both cases easily. Using an in_compat_syscall()
check, the caller does not have to keep track of whether this was
called through .unlocked_ioctl() or .compat_ioctl().
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: "Kai Mäkisara" <Kai.Makisara@kolumbus.fi>
Cc: linux-scsi@vger.kernel.org
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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We no longer need the rtc compat handling to be in common code, now that
all drivers are either moved to the rtc-class framework, or (rarely)
exist in drivers/char for architectures without compat mode (m68k,
alpha and ia64, respectively).
I checked the list of ioctl commands in drivers, and the ones that are
not already handled are all compatible, again with the one exception of
m68k driver, which implements RTC_PLL_GET and RTC_PLL_SET, but has no
compat mode.
Unlike earlier versions of this patch, I'm now adding a separate
compat_ioctl handler that takes care of RTC_IRQP_READ32/RTC_IRQP_SET32
and treats all other commands as compatible, leaving the native
behavior unchanged.
The old conversion handler also deals with RTC_EPOCH_READ and
RTC_EPOCH_SET, which are not handled in rtc-dev.c but only in a single
device driver (rtc-vr41xx), so I'm adding the compat version in the same
place. I don't expect other drivers to need those commands in the future.
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
v4: handle RTC_EPOCH_SET32 in rtc_dev_compat_ioctl
v3: handle RTC_IRQP_READ32/RTC_IRQP_SET32 in rtc_dev_compat_ioctl
v2: merge compat handler into ioctl function to avoid the
compat_alloc_user_space() roundtrip, based on feedback
from Al Viro.
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Handle ioctls that might be handled without reaching ->ioctl() in
native case on the top level there. The counterpart of vfs_ioctl()
(i.e. calling ->unlock_ioctl(), etc.) left as-is; eventually
that would turn simply into the call of ->compat_ioctl(), but
that'll take more work. Once that is done, we can move the
remains of compat_sys_ioctl() into fs/ioctl.c and finally bury
fs/compat_ioctl.c.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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... and lose the ridiculous games with compat_alloc_user_space()
there.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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... and hadn't for a long time.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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it takes a pointer argument, regular file or no regular file
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Unlike FICLONE, all of those take a pointer argument; they do need
compat_ptr() applied to arg.
Fixes: d79bdd52d8be ("vfs: wire up compat ioctl for CLONE/CLONE_RANGE")
Fixes: 54dbc1517237 ("vfs: hoist the btrfs deduplication ioctl to the vfs")
Fixes: ceac204e1da9 ("fs: make fiemap work from compat_ioctl")
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Support for handling the PPPOEIOCSFWD ioctl in compat mode was added in
linux-2.5.69 along with hundreds of other commands, but was always broken
sincen only the structure is compatible, but the command number is not,
due to the size being sizeof(size_t), or at first sizeof(sizeof((struct
sockaddr_pppox)), which is different on 64-bit architectures.
Guillaume Nault adds:
And the implementation was broken until 2016 (see 29e73269aa4d ("pppoe:
fix reference counting in PPPoE proxy")), and nobody ever noticed. I
should probably have removed this ioctl entirely instead of fixing it.
Clearly, it has never been used.
Fix it by adding a compat_ioctl handler for all pppoe variants that
translates the command number and then calls the regular ioctl function.
All other ioctl commands handled by pppoe are compatible between 32-bit
and 64-bit, and require compat_ptr() conversion.
This should apply to all stable kernels.
Acked-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media updates from Mauro Carvalho Chehab:
- new dvb frontend driver: lnbh29
- new sensor drivers: imx319 and imx 355
- some old soc_camera driver renames to avoid conflict with new
drivers
- new i.MX Pixel Pipeline (PXP) mem-to-mem platform driver
- a new V4L2 frontend for the FWHT codec
- several other improvements, bug fixes, code cleanups, etc
* tag 'media/v4.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (289 commits)
media: rename soc_camera I2C drivers
media: cec: forgot to cancel delayed work
media: vivid: Support 480p for webcam capture
media: v4l2-tpg: fix kernel oops when enabling HFLIP and OSD
media: vivid: Add 16-bit bayer to format list
media: v4l2-tpg-core: Add 16-bit bayer
media: pvrusb2: replace `printk` with `pr_*`
media: venus: vdec: fix decoded data size
media: cx231xx: fix potential sign-extension overflow on large shift
media: dt-bindings: media: rcar_vin: add device tree support for r8a7744
media: isif: fix a NULL pointer dereference bug
media: exynos4-is: make const array config_ids static
media: cx23885: make const array addr_list static
media: ivtv: make const array addr_list static
media: bttv-input: make const array addr_list static
media: cx18: Don't check for address of video_dev
media: dw9807-vcm: Fix probe error handling
media: dw9714: Remove useless error message
media: dw9714: Fix error handling in probe function
media: cec: name for RC passthrough device does not need 'RC for'
...
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull compat_ioctl fixes from Al Viro:
"A bunch of compat_ioctl fixes, mostly in bluetooth.
Hopefully, most of fs/compat_ioctl.c will get killed off over the next
few cycles; between this, tty series already merged and Arnd's work
this cycle ought to take a good chunk out of the damn thing..."
* 'work.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
hidp: fix compat_ioctl
hidp: constify hidp_connection_add()
cmtp: fix compat_ioctl
bnep: fix compat_ioctl
compat_ioctl: trim the pointless includes
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all of those are provided only by vt and s390 tty3270; both have
proper ->compat_ioctl()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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... and get rid of COMPAT_IOCTL() for its private ioctls
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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TIOCLINUX is handled by ->compat_ioctl() in the only place that has
native ->ioctl() recognizing it, TIOC{START,STOP} are simply useless
these days - unrecognized compat ioctl won't spew into syslog
anymore.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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ioctls that are
* callable only via tty_ioctl()
* not driver-specific
* not demand data structure conversions
* either always need passing arg as is or always demand compat_ptr()
get intercepted in tty_compat_ioctl() from the very beginning and
redirecter to tty_ioctl(). As the result, their entries in fs/compat_ioctl.c
(some of those had been missing, BTW) got removed, as well as
n_tty_compat_ioctl_helper() (now it's never called with any cmd it would accept).
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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The VIDEO_STILLPICTURE is only implemented by one driver, while
VIDEO_GET_EVENT has two users in tree. In both cases, it is fairly
easy to handle the compat ioctls in the native handler rather
than relying on translation in fs/compat_ioctls.
In effect, this means that now the drivers implement both structure
layouts in both native and compat mode, but I don't see anything
wrong with that.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
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Most DVB audio and video ioctl commands are completely compatible,
and are implemented by just two drivers: ttpci and ivtv. In both
cases, we can use the same ioctl handler for both native and
compat ioctl handling, and remove the entries from the global
lookup table.
In case of ttpci, this directly hooks into the file_operations
structure, and for ivtv, we have to set the compat_ioctl32
method in v4l2_file_operations. For all I can tell, setting it
to video_ioctl2 will still do the right thing for all commands.
Note that for the VIDEO_STILLPICTURE and VIDEO_GET_EVENT commands,
a translation handler in fs/compat_ioctl.c is still used. This
works because the command numbers are different on 32-bit
systems.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
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All the CEC ioctls are compatible, and they are only implemented
in one driver, so we can simply let this driver handle them
natively.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
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All dmx ioctls are compatible, and they are only implemented
in one file, so we can replace the list of commands in
fs/compat_ioctl.c with a single line in dmxdev.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
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The VIDEO_GET_EVENT and VIDEO_STILLPICTURE was added back in 2005 but
it never worked because the command number is wrong.
Using the right command number means we have a better chance of them
actually doing the right thing, though clearly nobody has ever tried
it successfully.
I noticed these while auditing the remaining users of compat_time_t
for y2038 bugs. This one is fine in that regard, it just never did
anything.
Fixes: 6e87abd0b8cb ("[DVB]: Add compat ioctl handling.")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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1) no point putting it into fs/compat_ioctl.c when you handle it in
your ->compat_ioctl() anyway.
2) HIDPCONNADD is *not* COMPATIBLE_IOCTL() stuff at all - it does
layout massage (pointer-chasing there)
3) use compat_ptr()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Use compat_ptr(). And don't mess with fs/compat_ioctl.c
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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use compat_ptr() properly and don't bother with fs/compat_ioctl.c -
it's all handled in ->compat_ioctl() anyway.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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