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* Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linusLinus Torvalds2008-02-04
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: (25 commits) virtio: balloon driver virtio: Use PCI revision field to indicate virtio PCI ABI version virtio: PCI device virtio_blk: implement naming for vda-vdz,vdaa-vdzz,vdaaa-vdzzz virtio_blk: Dont waste major numbers virtio_blk: provide getgeo virtio_net: parametrize the napi_weight for virtio receive queue. virtio: free transmit skbs when notified, not on next xmit. virtio: flush buffers on open virtnet: remove double ether_setup virtio: Allow virtio to be modular and used by modules virtio: Use the sg_phys convenience function. virtio: Put the virtio under the virtualization menu virtio: handle interrupts after callbacks turned off virtio: reset function virtio: populate network rings in the probe routine, not open virtio: Tweak virtio_net defines virtio: Net header needs hdr_len virtio: remove unused id field from struct virtio_blk_outhdr virtio: clarify NO_NOTIFY flag usage ...
| * virtio: balloon driverRusty Russell2008-02-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | After discussions with Anthony Liguori, it seems that the virtio balloon can be made even simpler. Here's my attempt. The device configuration tells the driver how much memory it should take from the guest (ie. balloon size). The guest feeds the page numbers it has taken via one virtqueue. A second virtqueue feeds the page numbers the driver wants back: if the device has the VIRTIO_BALLOON_F_MUST_TELL_HOST bit, then this queue is compulsory, otherwise it's advisory (and the guest can simply fault the pages back in). This driver can be enhanced later to deflate the balloon via a shrinker, oom callback or we could even go for a complete set of in-guest regulators. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio: Use PCI revision field to indicate virtio PCI ABI versionAnthony Liguori2008-02-04
| | | | | | | | | | | | | | | | | | | | | | | | As Avi pointed out, as we continue to massage the virtio PCI ABI, we can make things a little more friendly to users by utilizing the PCI revision field to indicate which version of the ABI we're using. This is a hard ABI version and incrementing it will cause the guest driver to break. This is the necessary changes to virtio_pci to support this. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio: PCI deviceAnthony Liguori2008-02-04
| | | | | | | | | | | | | | | | This is a PCI device that implements a transport for virtio. It allows virtio devices to be used by QEMU based VMMs like KVM or Xen. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio_blk: implement naming for vda-vdz,vdaa-vdzz,vdaaa-vdzzzChristian Borntraeger2008-02-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Am Freitag, 1. Februar 2008 schrieb Christian Borntraeger: > Right. I will fix that with an additional patch. This patch goes on top of the minor number patch. Please let me know if you want a merged patch: Currently virtio_blk creates the disk name combinging "vd" with 'a'++. This will give strange names after vdz. I have implemented names up to vdzzz - inspired by the sd.c code. That should be sufficient for now. There is one driver in the kernel (driver/s390/block/dasd_genhd.c) that implements names from dasda-dasdzzzz allowing even more disks. Maybe a janitor can come up with a common implementation usable for all kind of block device drivers. I have tested this patch with 100 disks - seems to work. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio_blk: Dont waste major numbersChristian Borntraeger2008-02-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Rusty, currently virtio_blk uses one major number per device. While this works quite well on most systems it is wasteful and will exhaust major numbers on larger installations. This patch allocates a major number on init and will use 16 minor numbers for each disk. That will allow ~64k virtio_blk disks. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio_blk: provide getgeoChristian Borntraeger2008-02-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rusty, I currently try to make my guest boot from an virtio root device without having an external kernel. Some of the tools that I tried expect HDIO_GETGEO to work. The most interesting value is likely the geo.start value to get the offset of a partition. This value is filled by block/ioctl.c if fops->getgeo is set. This patch also fills in some standard values for heads, sectors and cylinders. Makes sense? Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio_net: parametrize the napi_weight for virtio receive queue.Dor Laor2008-02-04
| | | | | | | | | | | | | | It is done in order to improve performance. Signed-off-by: Dor Laor <dor.laor@qumranet.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio: free transmit skbs when notified, not on next xmit.Rusty Russell2008-02-04
| | | | | | | | | | | | | | | | This fixes a potential dangling xmit problem. We also suppress refill interrupts until we need them. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio: flush buffers on openRusty Russell2008-02-04
| | | | | | | | | | | | | | | | | | Fix bug found by Christian Borntraeger: if the other side fills all the registered network buffers before we enable NAPI, we will never get an interrupt. The simplest fix is to process the input queue once on open. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtnet: remove double ether_setupChristian Borntraeger2008-02-04
| | | | | | | | | | | | | | | | | | | | Hello Rusty, virtnet_probe already calls alloc_etherdev, which calls ether_setup. There is no need to do that again. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio: Allow virtio to be modular and used by modulesRusty Russell2008-02-04
| | | | | | | | | | | | | | This is needed for the virtio PCI device to be compiled as a module. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio: Use the sg_phys convenience function.Rusty Russell2008-02-04
| | | | | | | | | | | | Simple cleanup. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio: Put the virtio under the virtualization menuAnthony Liguori2008-02-04
| | | | | | | | | | | | | | | | This patch moves virtio under the virtualization menu and changes virtio devices to not claim to only be for lguest. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio: handle interrupts after callbacks turned offRusty Russell2008-02-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Anthony Liguori found double interrupt suppression in the virtio_net driver, triggered by two skb_recv_done's in a row. This is because virtio_ring's interrupt suppression is a best-effort optimization: it contains no synchronization so the host can miss it and still send interrupts. But it's certainly nicer for virtio users if calling disable_cb actually disables callbacks, so we check for the race in the interrupt routine. Note: SMP guests might require syncronization here, but since disable_cb is actually called from interrupt context, there has to be some form of synchronization before the next same interrupt handler is called (Linux guarantees that the same device's irq handler will never run simultanously on multiple CPUs). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio: reset functionRusty Russell2008-02-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A reset function solves three problems: 1) It allows us to renegotiate features, eg. if we want to upgrade a guest driver without rebooting the guest. 2) It gives us a clean way of shutting down virtqueues: after a reset, we know that the buffers won't be used by the host, and 3) It helps the guest recover from messed-up drivers. So we remove the ->shutdown hook, and the only way we now remove feature bits is via reset. We leave it to the driver to do the reset before it deletes queues: the balloon driver, for example, needs to chat to the host in its remove function. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio: populate network rings in the probe routine, not openRusty Russell2008-02-04
| | | | | | | | | | | | | | Since we want to reset the device to remove them, this is simpler (device is reset for us on driver remove). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio: Tweak virtio_net definesRusty Russell2008-02-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1) Turn GSO on virtio net into an all-or-nothing (keep checksumming separate). Having multiple bits is a pain: if you can't support something you should handle it in software, which is still a performance win. 2) Make VIRTIO_NET_HDR_GSO_ECN a flag in the header, so it can apply to IPv6 or v4. 3) Rename VIRTIO_NET_F_NO_CSUM to VIRTIO_NET_F_CSUM (ie. means we do checksumming). 4) Add csum and gso params to virtio_net to allow more testing. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio: Net header needs hdr_lenRusty Russell2008-02-04
| | | | | | | | | | | | | | | | | | It's far easier to deal with packets if we don't have to parse the packet to figure out the header length to know how much to pull into the skb data. Add the field to the virtio_net_hdr struct (and fix the spaces that somehow crept in there). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio: remove unused id field from struct virtio_blk_outhdrRusty Russell2008-02-04
| | | | | | | | | | | | | | This field has been unused since an older version of virtio. Remove it now before we freeze the ABI. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au.
| * virtio: clarify NO_NOTIFY flag usageRusty Russell2008-02-04
| | | | | | | | | | | | | | | | | | The other side (host) can set the NO_NOTIFY flag as an optimization, to say "no need to kick me when you add things". Make it clear that this is advisory only; especially that we should always notify when the ring is full. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio: Fix vring_init/vring_size to take unsigned longAnthony Liguori2008-02-04
| | | | | | | | | | | | | | | | | | | | | | | | | | Using unsigned int resulted in silent truncation of the upper 32-bit on x86_64 resulting in an OOPS since the ring was being initialized wrong. Please reconsider my previous patch to just use PAGE_ALIGN(). Open coding this sort of stuff, no matter how simple it seems, is just asking for this sort of trouble. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio: configuration change callbackRusty Russell2008-02-04
| | | | | | | | | | | | | | | | | | | | Various drivers want to know when their configuration information changes: the balloon driver is the immediate user, but the network driver may one day have a "carrier" status as well. This introduces that callback (lguest doesn't use it yet). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio: explicit enable_cb/disable_cb rather than callback return.Rusty Russell2008-02-04
| | | | | | | | | | | | | | | | | | | | It seems that virtio_net wants to disable callbacks (interrupts) before calling netif_rx_schedule(), so we can't use the return value to do so. Rename "restart" to "cb_enable" and introduce "cb_disable" hook: callback now returns void, rather than a boolean. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio: simplify config mechanism.Rusty Russell2008-02-04
| | | | | | | | | | | | | | | | | | | | | | | | | | Previously we used a type/len pair within the config space, but this seems overkill. We now simply define a structure which represents the layout in the config space: the config space can now only be extended at the end. The main driver-visible changes: 1) We indicate what fields are present with an explicit feature bit. 2) Virtqueues are explicitly numbered, and not in the config space. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio: Implement skb_partial_csum_set, for setting partial csums on ↵Rusty Russell2008-02-04
| | | | | | | | | | | | | | | | | | | | untrusted packets. Use it in virtio_net (replacing buggy version there), it's also going to be used by TAP for partial csum support. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: David S. Miller <davem@davemloft.net>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivialLinus Torvalds2008-02-04
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial: (79 commits) Jesper Juhl is the new trivial patches maintainer Documentation: mention email-clients.txt in SubmittingPatches fs/binfmt_elf.c: spello fix do_invalidatepage() comment typo fix Documentation/filesystems/porting fixes typo fixes in net/core/net_namespace.c typo fix in net/rfkill/rfkill.c typo fixes in net/sctp/sm_statefuns.c lib/: Spelling fixes kernel/: Spelling fixes include/scsi/: Spelling fixes include/linux/: Spelling fixes include/asm-m68knommu/: Spelling fixes include/asm-frv/: Spelling fixes fs/: Spelling fixes drivers/watchdog/: Spelling fixes drivers/video/: Spelling fixes drivers/ssb/: Spelling fixes drivers/serial/: Spelling fixes drivers/scsi/: Spelling fixes ...
| * | Jesper Juhl is the new trivial patches maintainerAdrian Bunk2008-02-03
| | | | | | | | | | | | | | | | | | | | | | | | Jesper has agreed to take over maintainership for the trivial patches. Thanks, Jesper! Signed-off-by: Adrian Bunk <bunk@kernel.org>
| * | Documentation: mention email-clients.txt in SubmittingPatchesMichael Opdenacker2008-02-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I was struggling to get my email-client no to mangle my patch files, and I didn't find enough information in the SubmittingPatches file. By looking for more information on the web, I eventually found the email-clients.txt file, and it answered all my needs This patch adds a reference to email-clients.txt in SubmittingPatches, and Mozilla related information which is no longer accurate (as opposed to the details found in email-clients.txt). This should be helpful for people sending their first patches, or not sending patches on a frequent basis. Signed-off-by: Michael Opdenacker <michael@free-electrons.com> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Acked-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: Adrian Bunk <bunk@kernel.org>
| * | fs/binfmt_elf.c: spello fixOhad Ben-Cohen2008-02-03
| | | | | | | | | | | | | | | | | | | | | s/litle/little Signed-off-by: Ohad Ben-Cohen <ohad@bencohen.org> Signed-off-by: Adrian Bunk <bunk@kernel.org>
| * | do_invalidatepage() comment typo fixFengguang Wu2008-02-03
| | | | | | | | | | | | | | | | | | | | | Fix a typo in the comment for do_invalidatepage(). Signed-off-by: Fengguang Wu <wfg@mail.ustc.edu.cn> Signed-off-by: Adrian Bunk <bunk@kernel.org>
| * | Documentation/filesystems/porting fixesOliver Pinter2008-02-03
| | | | | | | | | | | | | | | | | | | | | typo fix and whitespace cleanup Signed-off-by: Oliver Pinter <oliver.pntr@gmail.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
| * | typo fixes in net/core/net_namespace.cOliver Pinter2008-02-03
| | | | | | | | | | | | | | | Signed-off-by: Oliver Pinter <oliver.pntr@gmail.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
| * | typo fix in net/rfkill/rfkill.cOliver Pinter2008-02-03
| | | | | | | | | | | | | | | Signed-off-by: Oliver Pinter <oliver.pntr@gmail.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
| * | typo fixes in net/sctp/sm_statefuns.cOliver Pinter2008-02-03
| | | | | | | | | | | | | | | Signed-off-by: Oliver Pinter <oliver.pntr@gmail.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
| * | lib/: Spelling fixesJoe Perches2008-02-03
| | | | | | | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
| * | kernel/: Spelling fixesJoe Perches2008-02-03
| | | | | | | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
| * | include/scsi/: Spelling fixesJoe Perches2008-02-03
| | | | | | | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
| * | include/linux/: Spelling fixesJoe Perches2008-02-03
| | | | | | | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
| * | include/asm-m68knommu/: Spelling fixesJoe Perches2008-02-03
| | | | | | | | | | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Adrian Bunk <bunk@kernel.org>
| * | include/asm-frv/: Spelling fixesJoe Perches2008-02-03
| | | | | | | | | | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Acked-by: David Howells <dhowells@redhat.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
| * | fs/: Spelling fixesJoe Perches2008-02-03
| | | | | | | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
| * | drivers/watchdog/: Spelling fixesJoe Perches2008-02-03
| | | | | | | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
| * | drivers/video/: Spelling fixesJoe Perches2008-02-03
| | | | | | | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
| * | drivers/ssb/: Spelling fixesJoe Perches2008-02-03
| | | | | | | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
| * | drivers/serial/: Spelling fixesJoe Perches2008-02-03
| | | | | | | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
| * | drivers/scsi/: Spelling fixesJoe Perches2008-02-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Andrew Vasquez <andrew.vasquez@qlogic.com> Acked-by: James Smart <james.smart@emulex.com> Acked-by: Darrick J. Wong <djwong@us.ibm.com> Acked-by: David Somayajulu <david.somayajulu@qlogic.com> Acked-by: Mark Salyzyn <mark_salyzyn@adaptec.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
| * | drivers/pcmcia/: Spelling fixesJoe Perches2008-02-03
| | | | | | | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
| * | drivers/parisc/: Spelling fixesJoe Perches2008-02-03
| | | | | | | | | | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Grant Grundler <grundler@parisc-linux.org> Signed-off-by: Adrian Bunk <bunk@kernel.org>
| * | drivers/nubus/: Spelling fixesJoe Perches2008-02-03
| | | | | | | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
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