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This patchset is a medium scale rewrite of the export operations interface.
The goal is to make the interface less complex, and easier to understand from
the filesystem side, aswell as preparing generic support for exporting of
64bit inode numbers.
This touches all nfs exporting filesystems, and I've done testing on all of
the filesystems I have here locally (xfs, ext2, ext3, reiserfs, jfs)
This patch:
Add a structured fid type so that we don't have to pass an array of u32 values
around everywhere. It's a union of possible layouts.
As a start there's only the u32 array and the traditional 32bit inode format,
but there will be more in one of my next patchset when I start to document the
various filehandle formats we have in lowlevel filesystems better.
Also add an enum that gives the various filehandle types human- readable
names.
Note: Some people might think the struct containing an anonymous union is
ugly, but I didn't want to pass around a raw union type.
Signed-off-by: Christoph Hellwig <[email protected]>
Cc: Neil Brown <[email protected]>
Cc: "J. Bruce Fields" <[email protected]>
Cc: <[email protected]>
Cc: Dave Kleikamp <[email protected]>
Cc: Anton Altaparmakov <[email protected]>
Cc: David Chinner <[email protected]>
Cc: Timothy Shimmin <[email protected]>
Cc: OGAWA Hirofumi <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Chris Mason <[email protected]>
Cc: Jeff Mahoney <[email protected]>
Cc: "Vladimir V. Saveliev" <[email protected]>
Cc: Steven Whitehouse <[email protected]>
Cc: Mark Fasheh <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Add the BSS to the resource tree just as kernel text and kernel data are in
the resource tree. The main reason behind this is to avoid crashkernel
reservation in that area.
While it's not strictly necessary to have the BSS in the resource tree (the
actual collision detection is done in the reserve_bootmem() function before),
the usage of the BSS resource should be presented to the user in /proc/iomem
just as Kernel data and Kernel code.
Note: The patch currently is only implemented for x86 and ia64 (because
efi_initialize_iomem_resources() has the same signature on i386 and ia64).
[[email protected]: coding-style fixes]
Signed-off-by: Bernhard Walle <[email protected]>
Cc: "Eric W. Biederman" <[email protected]>
Cc: Vivek Goyal <[email protected]>
Cc: <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Ingo Molnar <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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MSI interrupt handler registrations and fault handling support for Intel-IOMMU
hadrware.
This patch enables the MSI interrupts for the DMA remapping units and in the
interrupt handler read the fault cause and outputs the same on to the console.
Signed-off-by: Anil S Keshavamurthy <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Muli Ben-Yehuda <[email protected]>
Cc: "Siddha, Suresh B" <[email protected]>
Cc: Arjan van de Ven <[email protected]>
Cc: Ashok Raj <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Greg KH <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Actual intel IOMMU driver. Hardware spec can be found at:
http://www.intel.com/technology/virtualization
This driver sets X86_64 'dma_ops', so hook into standard DMA APIs. In this
way, PCI driver will get virtual DMA address. This change is transparent to
PCI drivers.
[[email protected]: remove unneeded cast]
[[email protected]: build fix]
[[email protected]: fix duplicate CONFIG_DMAR Makefile line]
Signed-off-by: Anil S Keshavamurthy <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Muli Ben-Yehuda <[email protected]>
Cc: "Siddha, Suresh B" <[email protected]>
Cc: Arjan van de Ven <[email protected]>
Cc: Ashok Raj <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Greg KH <[email protected]>
Signed-off-by: Adrian Bunk <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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When devices are under a p2p bridge, upstream transactions get replaced by the
device id of the bridge as it owns the PCIE transaction. Hence its necessary
to setup translations on behalf of the bridge as well. Due to this limitation
all devices under a p2p share the same domain in a DMAR.
We just cache the type of device, if its a native PCIe device
or not for later use.
[[email protected]: BUG_ON -> WARN_ON+recover]
Signed-off-by: Anil S Keshavamurthy <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Muli Ben-Yehuda <[email protected]>
Cc: "Siddha, Suresh B" <[email protected]>
Cc: Arjan van de Ven <[email protected]>
Cc: Ashok Raj <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Greg KH <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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This patch supports the upcomming Intel IOMMU hardware a.k.a. Intel(R)
Virtualization Technology for Directed I/O Architecture and the hardware spec
for the same can be found here
http://www.intel.com/technology/virtualization/index.htm
FAQ! (questions from akpm, answers from ak)
> So... what's all this code for?
>
> I assume that the intent here is to speed things up under Xen, etc?
Yes in some cases, but not this code. That would be the Xen version of this
code that could potentially assign whole devices to guests. I expect this to
be only useful in some special cases though because most hardware is not
virtualizable and you typically want an own instance for each guest.
Ok at some point KVM might implement this too; i likely would use this code
for this.
> Do we
> have any benchmark results to help us to decide whether a merge would be
> justified?
The main advantage for doing it in the normal kernel is not performance, but
more safety. Broken devices won't be able to corrupt memory by doing random
DMA.
Unfortunately that doesn't work for graphics yet, for that need user space
interfaces for the X server are needed.
There are some potential performance benefits too:
- When you have a device that cannot address the complete address range an
IOMMU can remap its memory instead of bounce buffering. Remapping is likely
cheaper than copying.
- The IOMMU can merge sg lists into a single virtual block. This could
potentially speed up SG IO when the device is slow walking SG lists. [I
long ago benchmarked 5% on some block benchmark with an old MPT Fusion; but
it probably depends a lot on the HBA]
And you get better driver debugging because unexpected memory accesses from
the devices will cause a trappable event.
>
> Does it slow anything down?
It adds more overhead to each IO so yes.
This patch:
Add support for early detection and parsing of DMAR's (DMA Remapping) reported
to OS via ACPI tables.
DMA remapping(DMAR) devices support enables independent address translations
for Direct Memory Access(DMA) from Devices. These DMA remapping devices are
reported via ACPI tables and includes pci device scope covered by these DMA
remapping device.
For detailed info on the specification of "Intel(R) Virtualization Technology
for Directed I/O Architecture" please see
http://www.intel.com/technology/virtualization/index.htm
Signed-off-by: Anil S Keshavamurthy <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Muli Ben-Yehuda <[email protected]>
Cc: "Siddha, Suresh B" <[email protected]>
Cc: Arjan van de Ven <[email protected]>
Cc: Ashok Raj <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Greg KH <[email protected]>
Cc: Len Brown <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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With 64KB blocksize, a directory entry can have size 64KB which does not
fit into 16 bits we have for entry length. So we store 0xffff instead and
convert the value when read from / written to disk.
[[email protected]: coding-style fixes]
Signed-off-by: Jan Kara <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Simplify the vfs_cap_data structure.
Also fix get_file_caps which was declaring
__le32 v1caps[XATTR_CAPS_SZ] on the stack, but
XATTR_CAPS_SZ is already * sizeof(__le32).
[[email protected]: coding-style fixes]
Signed-off-by: Serge E. Hallyn <[email protected]>
Cc: Andrew Morgan <[email protected]>
Cc: Chris Wright <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Fix a panic due to access NULL pointer of kmem_cache_node at discard_slab()
after memory online.
When memory online is called, kmem_cache_nodes are created for all SLUBs
for new node whose memory are available.
slab_mem_going_online_callback() is called to make kmem_cache_node() in
callback of memory online event. If it (or other callbacks) fails, then
slab_mem_offline_callback() is called for rollback.
In memory offline, slab_mem_going_offline_callback() is called to shrink
all slub cache, then slab_mem_offline_callback() is called later.
[[email protected]: coding-style fixes]
[[email protected]: locking fix]
[[email protected]: build fix]
Signed-off-by: Yasunori Goto <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Current memory notifier has some defects yet. (Fortunately, nothing uses
it.) This patch is to fix and rearrange for them.
- Add information of start_pfn, nr_pages, and node id if node status is
changes from/to memoryless node for callback functions.
Callbacks can't do anything without those information.
- Add notification going-online status.
It is necessary for creating per node structure before the node's
pages are available.
- Move GOING_OFFLINE status notification after page isolation.
It is good place for return memory like cache for callback,
because returned page is not used again.
- Make CANCEL events for rollingback when error occurs.
- Delete MEM_MAPPING_INVALID notification. It will be not used.
- Fix compile error of (un)register_memory_notifier().
Signed-off-by: Yasunori Goto <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Signed-off-by: Jeremy Fitzhardinge <[email protected]>
Signed-off-by: Rusty Russell <[email protected]>
Acked-by: H. Peter Anvin <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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We can then transition drivers without changing the generated code.
Signed-off-by: Jens Axboe <[email protected]>
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Remove the obsolete VIDIOC_G_MPEGCOMP and VIDIOC_S_MPEGCOMP ioctls from
the V4L2 API as per the removal schedule (October 2007).
Signed-off-by: Hans Verkuil <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
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struct video_device used to define a .hardware field. While
initialized on severl drivers, this field is never used inside V4L.
However, drivers using it need to include the old V4L1 header.
This seems to cause compilation troubles with some random configs.
Better just to remove it from all drivers.
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
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Just hide it behind the #ifdef, because nobody wants
it now.
Signed-off-by: Pavel Emelyanov <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Many places get the queue_mapping field from skb to pass it to the
netif_subqueue_stopped() which will be 0 in any case.
Make the helper that works with sk_buff
Signed-off-by: Pavel Emelyanov <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Make the helper for getting the field, symmetrical to
the "set" one. Return 0 if CONFIG_NETDEVICES_MULTIQUEUE=n
Signed-off-by: Pavel Emelyanov <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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By adding module aliases to inet_diag, tcp_diag and dccp_diag, we let
them load automatically as needed. This makes tools like "ss" run
faster.
Signed-off-by: Jean Delvare <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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The calculation in SKB_WITH_OVERHEAD is incorrect in that it can cause
an overflow across a page boundary which is what it's meant to prevent.
In particular, the header length (X) should not be lumped together with
skb_shared_info. The latter needs to be aligned properly while the header
has no choice but to sit in front of wherever the payload is.
Therefore the correct calculation is to take away the aligned size of
skb_shared_info, and then subtract the header length. The resulting
quantity L satisfies the following inequality:
SKB_DATA_ALIGN(L + X) + sizeof(struct skb_shared_info) <= PAGE_SIZE
This is the quantity used by alloc_skb to do the actual allocation.
Signed-off-by: Herbert Xu <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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This patch adds support for upcoming 5723 devices.
Signed-off-by: Matt Carlson <[email protected]>
Signed-off-by: Michael Chan <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Assign the next free socket options level to be used by the Bluetooth
protocol and address family.
Signed-off-by: Marcel Holtmann <[email protected]>
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Export the i8042_command() function which manages the mutual
exclusion with the help of the i8042_lock spinlock. This allows
to access i8042 safely from other parts of the kernel.
Signed-off-by: Márton Németh <[email protected]>
Signed-off-by: Dmitry Torokhov <[email protected]>
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New kind of audit rule predicates: "object is visible in given subtree".
The part that can be sanely implemented, that is. Limitations:
* if you have hardlink from outside of tree, you'd better watch
it too (or just watch the object itself, obviously)
* if you mount something under a watched tree, tell audit
that new chunk should be added to watched subtrees
* if you umount something in a watched tree and it's still mounted
elsewhere, you will get matches on events happening there. New command
tells audit to recalculate the trees, trimming such sources of false
positives.
Note that it's _not_ about path - if something mounted in several places
(multiple mount, bindings, different namespaces, etc.), the match does
_not_ depend on which one we are using for access.
Signed-off-by: Al Viro <[email protected]>
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Kicks the watch out without dropping it. Called under ->inotify_mutex
Signed-off-by: Al Viro <[email protected]>
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Signed-off-by: Al Viro <[email protected]>
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Get a snapshot of a subtree, creating private clones of vfsmounts
for all its components and release such snapshot resp.
Signed-off-by: Al Viro <[email protected]>
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makes caller simpler *and* allows to scan ancestors
Signed-off-by: Al Viro <[email protected]>
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* git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial: (74 commits)
fix do_sys_open() prototype
sysfs: trivial: fix sysfs_create_file kerneldoc spelling mistake
Documentation: Fix typo in SubmitChecklist.
Typo: depricated -> deprecated
Add missing profile=kvm option to Documentation/kernel-parameters.txt
fix typo about TBI in e1000 comment
proc.txt: Add /proc/stat field
small documentation fixes
Fix compiler warning in smount example program from sharedsubtree.txt
docs/sysfs: add missing word to sysfs attribute explanation
documentation/ext3: grammar fixes
Documentation/java.txt: typo and grammar fixes
Documentation/filesystems/vfs.txt: typo fix
include/asm-*/system.h: remove unused set_rmb(), set_wmb() macros
trivial copy_data_pages() tidy up
Fix typo in arch/x86/kernel/tsc_32.c
file link fix for Pegasus USB net driver help
remove unused return within void return function
Typo fixes retrun -> return
x86 hpet.h: remove broken links
...
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* master.kernel.org:/pub/scm/linux/kernel/git/bart/ide-2.6: (50 commits)
ide: remove inclusion of non-existent io_trace.h
ide-disk: add get_smart_data() helper
ide: fix ->data_phase in taskfile_load_raw()
ide: check drive->using_dma in flagged_taskfile()
ide: check ->dma_setup() return value in flagged_taskfile()
dtc2278: note on docs
qd65xx: remove pointless qd_{read,write}_reg() (take 2)
ide: PCI BMDMA initialization fixes (take 2)
ide: remove stale comments from ide-taskfile.c
ide: remove dead code from ide_driveid_update()
ide: use __ide_end_request() in ide_end_dequeued_request()
ide: enhance ide_setup_pci_noise()
cs5530: remove needless ide_lock taking
ide: take ide_lock for prefetch disable/enable in do_special()
ht6560b: fix deadlock on error handling
cmd640: fix deadlock on error handling
slc90e66: fix deadlock on error handling
opti621: fix deadlock on error handling
qd65xx: fix deadlock on error handling
dtc2278: fix deadlock on error handling
...
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Fix an argument name in do_sys_open()'s prototype.
Signed-off-by: Jason Uhlenkott <[email protected]>
Signed-off-by: Adrian Bunk <[email protected]>
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Typo: depricated -> deprecated
Signed-off-by: Rolf Eike Beer <[email protected]>
Signed-off-by: Adrian Bunk <[email protected]>
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This patch adds support for the dm_path_event dm_send_event functions which
create and send udev events.
Signed-off-by: Mike Anderson <[email protected]>
Signed-off-by: Alasdair G Kergon <[email protected]>
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This patch adds a function to obtain a copy of a mapped device's name and uuid.
Signed-off-by: Mike Anderson <[email protected]>
Signed-off-by: Alasdair G Kergon <[email protected]>
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Make size of dm_ioctl struct always 312 bytes on all supported
architectures.
This change retains compatibility with already-compiled code because
it uses an embedded offset to locate the payload that follows the
structure.
On 64-bit architectures there is no change at all; on 32-bit
we are increasing the size of dm-ioctl from 308 to 312 bytes.
Currently with 32-bit userspace / 64-bit kernel on x86_64
some ioctls (including rename, message) are incorrectly rejected
by the comparison against 'param + 1'. This breaks userspace
lvrename and multipath 'fail_if_no_path' changes, for example.
(BTW Device-mapper uses its own versioning and ignores the ioctl
size bits. Only the generic ioctl compat code on mixed arches
checks them, and that will continue to accept both sizes for now,
but we intend to list 308 as deprecated and eventually remove it.)
Signed-off-by: Milan Broz <[email protected]>
Signed-off-by: Alasdair G Kergon <[email protected]>
Cc: Guido Guenther <[email protected]>
Cc: Kevin Corry <[email protected]>
Cc: [email protected]
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Update the security_socket_peersec documentation in
include/linux/security.h. security_socket_peersec has been split
into two functions - _stream and _dgram, with new capabilities.
Signed-off-by: Serge Hallyn <[email protected]>
Signed-off-by: Adrian Bunk <[email protected]>
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Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
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* Rename struct ide_pci_device_s to struct ide_port_info.
* Remove ide_pci_device_t typedef.
While at it:
* Fix __ide_pci_register_driver() comment.
* Fix aec62xx_init_one() comment.
* Remove unused 'cds' field from ide_hwgroup_t.
Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
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Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
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* Add hwif->ack_intr hook and use it instead of hwif->hw.ack_intr.
* Add missing brackets to cris-v32 and powerpc ide_ack_intr() macros.
Cc: Roman Zippel <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Andrew Morton <[email protected]>
Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
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* hwif->hwif_data contains pointer to struct expansion_card so use ec->dma
directly instead of caching it in hwif->hw.dma.
* Remove no longer needed hw_regs_t.dma and NO_DMA define.
Cc: Russell King <[email protected]>
Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
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Add CONFIG_IDE_ARCH_OBSOLETE_INIT to drivers/ide/Kconfig and use it instead
of defining IDE_ARCH_OBSOLETE_INIT in <arch/ide.h>.
Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
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There is better documentation for these functions in drivers/ide/.
Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
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* Add ide_find_port() helper.
* Convert icside, rapide and ide_platform host drivers to use it.
Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
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* Add ide_device_add() helper and convert host drivers to use it
instead of open-coded variants.
* Make ide_pci_setup_ports() and do_ide_setup_pci_device()
take 'u8 *idx' argument instead of 'ata_index_t *index'.
* Remove no longer needed ata_index_t.
* Unexport probe_hwif_init() and make it static.
* Unexport ide_proc_register_port().
There should be no functionality changes caused by this patch
(sgiioc4.c: ide_proc_register_port() requires hwif->present
to be set and it won't be set if probe_hwif_init() fails).
Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
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* Add ->fixup method to ide_hwif_t.
* Set hwif->fixup in ide_pci_setup_ports() to d->fixup.
* Use hwif->fixup in probe_hwif().
* Use probe_hwif_init() instead of probe_hwif_init_with_fixup() in
ide_setup_pci_device().
* Add 'fixup' argument to ide_register_hw() and use it to set hwif->fixup,
update all ide_register_hw() users accordingly.
* Convert ide-cs/delkin_cb host drivers to use ide_register_hw().
* Restore hwif->fixup in ide_hwif_restore().
* Remove ide_register_hw_with_fixup(), probe_hwif_init_with_fixup()
and 'fixup' argument from probe_hwif().
Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
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Add IDE_HFLAG_{IO_32BIT,UNMASK_IRQS} host flag to tell ide_pci_setup_ports()
to set drive->{io_32bit,unmask} for both drives on the interface. Convert
amd74xx, sl82c105 and via82cxxx host drivers to use these new host flags.
While at it:
* Add IDE_HFLAGS_AMD define (amd74xx host driver).
* Add IDE_HFLAGS_VIA define (via82cxxx host driver).
Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
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Add IDE_HFLAG_RQSIZE_256 host flag to tell ide_pci_setup_ports() to set
hwif->rqsize to 256 sectors. Convert pdc202xx_old host driver to use it.
Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
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Add IDE_HFLAG_FORCE_LEGACY_IRQS host flag to tell ide_pci_setup_ports()
to always set hwif->irq to legacy IRQ 14/15 and convert generic IDE PCI
and via82cxxx host drivers to use it.
While at it:
* Add IDE_HFLAGS_UMC define (generic IDE PCI host driver).
* Remove no longer needed init_hwif_generic() (generic IDE PCI host driver).
* Set d->udma_mask instead of hwif->ultra_mask (via82cxxx host driver).
Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
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Add ->chipset field to ide_pci_device_t and use it in ide_hwif_configure()
to set hwif->chipset. Convert cmd64x, cy82c693, rz1000 and trm290 host
drivers to use this new ability.
While at it define hwif_chipset_t as u8 to save some space in hw_regs_t,
ide_hwif_t and ide_pci_device_t instances.
Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
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Acked-by: Sergei Shtylyov <[email protected]>
Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
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