* git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86:
alpha: fix x86.git merge build error
ia64: on UP percpu variables are not small memory model
x86: fix arch/x86/kernel/test_nx.c modular build bug
s390: use generic percpu linux-2.6.git
POWERPC: use generic per cpu
ia64: use generic percpu
SPARC64: use generic percpu
percpu: change Kconfig to HAVE_SETUP_PER_CPU_AREA
modules: fold percpu_modcopy into module.c
x86: export copy_from_user_ll_nocache[_nozero]
x86: fix duplicated TIF on 64-bit
Linus Torvalds [Thu, 31 Jan 2008 00:40:18 +0000 (11:40 +1100)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6: (26 commits)
firewire: fw-sbp2: Use sbp2 device-provided mgt orb timeout for logins
firewire: fw-sbp2: increase login orb reply timeout, fix "failed to login"
firewire: replace subtraction with bitwise and
firewire: fw-core: react on bus resets while the config ROM is being fetched
firewire: enforce access order between generation and node ID, fix "giving up on config rom"
firewire: fw-cdev: use device generation, not card generation
firewire: fw-sbp2: use device generation, not card generation
firewire: fw-sbp2: try to increase reconnect_hold (speed up reconnection)
firewire: fw-sbp2: skip unnecessary logout
firewire vs. ieee1394: clarify MAINTAINERS
firewire: fw-ohci: Dynamically allocate buffers for DMA descriptors
firewire: fw-ohci: CycleTooLong interrupt management
firewire: Fix extraction of source node id
firewire: fw-ohci: Bug fixes for packet-per-buffer support
firewire: fw-ohci: Fix for dualbuffer three-or-more buffers
firewire: fw-sbp2: remove unused misleading macro
firewire: fw-sbp2: prepare for s/g chaining
firewire: fw-sbp2: refactor workq and kref handling
ieee1394: ohci1394: don't schedule IT tasklets on IR events
ieee1394: sbp2: raise default transfer size limit
...
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: (27 commits)
lguest: use __PAGE_KERNEL instead of _PAGE_KERNEL
lguest: Use explicit includes rateher than indirect
lguest: get rid of lg variable assignments
lguest: change gpte_addr header
lguest: move changed bitmap to lg_cpu
lguest: move last_pages to lg_cpu
lguest: change last_guest to last_cpu
lguest: change spte_addr header
lguest: per-vcpu lguest pgdir management
lguest: make pending notifications per-vcpu
lguest: makes special fields be per-vcpu
lguest: per-vcpu lguest task management
lguest: replace lguest_arch with lg_cpu_arch.
lguest: make registers per-vcpu
lguest: make emulate_insn receive a vcpu struct.
lguest: map_switcher_in_guest() per-vcpu
lguest: per-vcpu interrupt processing.
lguest: per-vcpu lguest timers
lguest: make hypercalls use the vcpu struct
lguest: make write() operation smp aware
...
Manual conflict resolved (maybe even correctly, who knows) in
drivers/lguest/x86/core.c
Linus Torvalds [Wed, 30 Jan 2008 22:32:24 +0000 (09:32 +1100)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/selinux-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/selinux-2.6:
security: compile capabilities by default
selinux: make selinux_set_mnt_opts() static
SELinux: Add warning messages on network denial due to error
SELinux: Add network ingress and egress control permission checks
NetLabel: Add auditing to the static labeling mechanism
NetLabel: Introduce static network labels for unlabeled connections
SELinux: Allow NetLabel to directly cache SIDs
SELinux: Enable dynamic enable/disable of the network access checks
SELinux: Better integration between peer labeling subsystems
SELinux: Add a new peer class and permissions to the Flask definitions
SELinux: Add a capabilities bitmap to SELinux policy version 22
SELinux: Add a network node caching mechanism similar to the sel_netif_*() functions
SELinux: Only store the network interface's ifindex
SELinux: Convert the netif code to use ifindex values
NetLabel: Add IP address family information to the netlbl_skbuff_getattr() function
NetLabel: Add secid token support to the NetLabel secattr struct
NetLabel: Consolidate the LSM domain mapping/hashing locks
NetLabel: Cleanup the LSM domain hash functions
NetLabel: Remove unneeded RCU read locks
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-2.6:
PPC: Fix powerpc vio_find_name to not use devices_subsys
Driver core: add bus_find_device_by_name function
Module: check to see if we have a built in module with the same name
x86: fix runtime error in arch/x86/kernel/cpu/mcheck/mce_amd_64.c
Driver core: Fix up build when CONFIG_BLOCK=N
Linus Torvalds [Wed, 30 Jan 2008 22:29:31 +0000 (09:29 +1100)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm: (21 commits)
dlm: static initialization improvements
dlm: clean ups
dlm: Sanity check namelen before copying it
dlm: keep cached master rsbs during recovery
dlm: change error message to debug
dlm: fix possible use-after-free
dlm: limit dir lookup loop
dlm: reject normal unlock when lock is waiting for lookup
dlm: validate messages before processing
dlm: reject messages from non-members
dlm: another call to confirm_master in receive_request_reply
dlm: recover locks waiting for overlap replies
dlm: clear ast_type when removing from astqueue
dlm: use fixed errno values in messages
dlm: swap bytes for rcom lock reply
dlm: align midcomms message buffer
dlm: close othercons
dlm: use dlm prefix on alloc and free functions
dlm: don't print common non-errors
dlm: proper prototypes
...
Ingo Molnar [Wed, 30 Jan 2008 22:27:58 +0000 (23:27 +0100)]
ia64: on UP percpu variables are not small memory model
Tony says:
| The CONFIG_SMP=n path in ia64 makes quite radical changes ... rather
| than putting all the per-cpu stuff into the top 64K of address space
| and providing a per-cpu TLB mapping for that range to a different
| physical address ... it just makes all the per-cpu stuff link as ordinary
| variables in .data.
the new generic percpu code got confused about this as PER_CPU_ATTRIBUTES
was defined even on UP, so it picked up that small memory model - which
was not possible to get linked. The right fix is to only define that
on SMP. This resolved the build failures in my cross-compiling environment.
also link these variables into the .percpu section even on UP - some
assembly code has offset dependencies. (such as GET_IA64_MCA_DATA() in
arch/ia64/kernel/mca_asm.S)
Signed-off-by: Ingo Molnar <mingo@elte.hu> Acked-by: Tony Luck <tony.luck@intel.com>
travis@sgi.com [Wed, 30 Jan 2008 22:27:58 +0000 (23:27 +0100)]
POWERPC: use generic per cpu
Powerpc has a way to determine the address of the per cpu area of the
currently executing processor via the paca and the array of per cpu
offsets is avoided by looking up the per cpu area from the remote
paca's (copying x86_64).
Cc: Paul Mackerras <paulus@samba.org> Cc: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Acked-by: Olof Johansson <olof@lixom.net> Tested-by: Geoff Levand <geoffrey.levand@am.sony.com>
travis@sgi.com [Wed, 30 Jan 2008 22:27:58 +0000 (23:27 +0100)]
modules: fold percpu_modcopy into module.c
percpu_modcopy() is defined multiple times in arch files. However, the only
user is module.c. Put a static definition into module.c and remove
the definitions from the arch files.
Jarod Wilson [Sat, 26 Jan 2008 04:31:12 +0000 (23:31 -0500)]
firewire: fw-sbp2: Use sbp2 device-provided mgt orb timeout for logins
To be more compliant with section 7.4.8 of the SBP-2 specification,
use the mgt_ORB_timeout specified in the SBP-2 device's config rom
for login ORB attempts (though with some sanity checks). A happy
side-effect is that certain device and controller combinations that
sometimes take more than 20 seconds to get synced up (like my laptop
with just about any SBP-2 device) now function more reliably.
Signed-off-by: Jarod Wilson <jwilson@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (silenced sparse)
Increase (and rename) the login orb reply timeout value to 20s
to match that of the old firewire stack. 2s simply didn't give
many devices enough time to spin up and reply.
Fixes inability to recognize some devices.
Failure mode was "orb reply timed out"/"failed to login".
Signed-off-by: Jarod Wilson <jwilson@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (style, comments, changelog)
Jarod Wilson [Wed, 23 Jan 2008 21:05:45 +0000 (16:05 -0500)]
firewire: replace subtraction with bitwise and
Replace an unnecessary subtraction with a bitwise AND when determining the
value of ext_tcode in fw_fill_transaction() to save a cpu cycle or two in a
somewhat critical path.
Signed-off-by: Jarod Wilson <jwilson@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Stefan Richter [Fri, 25 Jan 2008 16:53:49 +0000 (17:53 +0100)]
firewire: fw-core: react on bus resets while the config ROM is being fetched
read_rom() obtained a fresh new fw_device.generation for each read
transaction. Hence it was able to continue reading in the middle of the
ROM even if a bus reset happened. However the device may have modified
the ROM during the reset. We would end up with a corrupt fetched ROM
image then.
Although all of this is quite unlikely, it is not impossible.
Therefore we now restart reading the ROM if the bus generation changed.
Note, the memory barrier in read_rom() is still necessary according to
tests by Jarod Wilson, despite of the ->generation access being moved up
in the call chain.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This is essentially what I've been beating on locally, and I've yet to hit
another config rom read failure with it.
Stefan Richter [Fri, 25 Jan 2008 17:57:41 +0000 (18:57 +0100)]
firewire: enforce access order between generation and node ID, fix "giving up on config rom"
fw_device.node_id and fw_device.generation are accessed without mutexes.
We have to ensure that all readers will get to see node_id updates
before generation updates.
Fixes an inability to recognize devices after "giving up on config rom",
https://bugzilla.redhat.com/show_bug.cgi?id=429950
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Reviewed by Nick Piggin <nickpiggin@yahoo.com.au>.
Verified to fix 'giving up on config rom' issues on multiple system and
drive combinations that were previously affected.
Signed-off-by: Jarod Wilson <jwilson@redhat.com> Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Stefan Richter [Thu, 24 Jan 2008 00:53:51 +0000 (01:53 +0100)]
firewire: fw-cdev: use device generation, not card generation
We have to use the fw_device.generation here, not the fw_card.generation,
because the generation must never be newer than the node ID when we emit
a transaction. This cannot be guaranteed with fw_card.generation.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Verified in concert with subsequent memory barriers patch to fix 'giving
up on config rom' issues on multiple system and drive combinations that
were previously affected.
Stefan Richter [Thu, 24 Jan 2008 00:53:19 +0000 (01:53 +0100)]
firewire: fw-sbp2: use device generation, not card generation
There was a small window where a login or reconnect job could use an
already updated card generation with an outdated node ID. We have to
use the fw_device.generation here, not the fw_card.generation, because
the generation must never be newer than the node ID when we emit a
transaction. This cannot be guaranteed with fw_card.generation.
Furthermore, the target's and initiator's node IDs can be obtained from
fw_device and fw_card. Dereferencing their underlying topology objects
is not necessary.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Verified in concert with subsequent memory barriers patch to fix 'giving
up on config rom' issues on multiple system and drive combinations that
were previously affected.
Stefan Richter [Sun, 20 Jan 2008 00:25:31 +0000 (01:25 +0100)]
firewire: fw-sbp2: try to increase reconnect_hold (speed up reconnection)
Ask the target to grant 4 seconds instead of the standard and minimum of
1 second window after bus reset for reconnection. This accelerates
reconnection if there are more than one targets on the bus: If a login
and inquiry to one target blocks the fw-sbp2 workqueue for more than 1s
after bus reset, we now still can reconnect to the other target.
Before that, fw-sbp2's reconnect attempts would be rejected with "error
status: 0:9" (function rejected), and fw-sbp2 would finally re-login.
All those futile reconnect attemps cost extra time until the target
which needs re-login is ready for I/O again.
The reconnect timeout field in the login ORB doesn't have to be honored
by the target though. I found that we could get up to
- allegedly 32768s from an old OXFW911 firmware
- 256s from LSI bridges
- 4s from OXUF922 and OXFW912 bridges,
- 2s from TI bridges,
- only the standard 1s from Initio and Prolific bridges and from
Apple OpenFirmware in target mode.
We just try to get 4 seconds which already covers the case of a few
HDDs on the same bus quite nicely.
A minor drawback occurs in the following (rare and impractical) border
case:
- two initiators are there, initiator 1 holds an exclusive login to
a target,
- initiator 1 goes off the bus,
- target refuses login attempts from initiator 2 until reconnect_hold
seconds after bus reset.
An alternative approach to the issue at hand would be to parallelize
fw-sbp2's reconnect and login work.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Acked-by: Jarod Wilson <jwilson@redhat.com>
Stefan Richter [Sun, 20 Jan 2008 00:24:26 +0000 (01:24 +0100)]
firewire: fw-sbp2: skip unnecessary logout
Don't attempt to send a logout ORB if the target was already unplugged
or had its link switched off. If two targets are attached, this
enhances the chance to quickly reconnect to the remaining target when
one target is plugged out.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Acked-by: Jarod Wilson <jwilson@redhat.com>
David Moore [Sun, 6 Jan 2008 22:21:41 +0000 (17:21 -0500)]
firewire: fw-ohci: Dynamically allocate buffers for DMA descriptors
Previously, the fw-ohci driver used fixed-length buffers for storing
descriptors for isochronous receive DMA programs. If an application
(such as libdc1394) generated a DMA program that was too large, fw-ohci
would reach the limit of its fixed-sized buffer and return an error to
userspace.
This patch replaces the fixed-length ring-buffer with a linked-list of
page-sized buffers. Additional buffers can be dynamically allocated and
appended to the list when necessary. For a particular context, buffers
are kept around after use and reused as necessary, so there is no
allocation taking place after the DMA program is generated for the first
time.
In addition, the buffers it uses are coherent for DMA so there is no
syncing required before and after writes. This syncing wasn't properly
done in the previous version of the code.
-
This is the fourth version of my patch that replaces a fixed-length
buffer for DMA descriptors with a dynamically allocated linked-list of
buffers.
As we discovered with the last attempt, new context programs are
sometimes queued from interrupt context, making it unacceptable to call
tasklet_disable() from context_get_descriptors().
This version of the patch uses ohci->lock for all locking needs instead
of tasklet_disable/enable. There is a new requirement that
context_get_descriptors() be called while holding ohci->lock. It was
already held for the AT context, so adding the requirement for the iso
context did not seem particularly onerous. In addition, this has the
side benefit of allowing iso queue to be safely called from concurrent
user-space threads, which previously was not safe.
Signed-off-by: David Moore <dcm@acm.org> Signed-off-by: Kristian Høgsberg <krh@redhat.com> Signed-off-by: Jarod Wilson <jwilson@redhat.com>
-
Fixes the following issues:
- Isochronous reception stopped prematurely if an application used a
larger buffer. (Reproduced with coriander.)
- Isochronous reception stopped after one or a few frames on VT630x
in OHCI 1.0 mode. (Fixes reception in coriander, but dvgrab still
doesn't work with these chips.)
Patch update: struct member alignment, whitespace nits
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
The firewire-ohci driver so far lacked the ability to resume cycle
master duty after that condition happened, as added to ohci1394 in Linux
2.6.18 by commit 57fdb58fa5a140bdd52cf4c4ffc30df73676f0a5. This ports
this patch to fw-ohci.
The "cycle too long" condition has been seen in practice
- with IIDC cameras if a mode with packets too large for a speed is
chosen,
- sporadically when capturing DV on a VIA VT6306 card with ohci1394/
ieee1394/ raw1394/ dvgrab 2.
https://bugzilla.redhat.com/show_bug.cgi?id=415841#c7
(This does not fix Fedora bug 415841.)
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
David Moore [Wed, 19 Dec 2007 20:26:38 +0000 (15:26 -0500)]
firewire: fw-ohci: Bug fixes for packet-per-buffer support
This patch corrects a number of bugs in the current OHCI 1.0
packet-per-buffer support:
1. Correctly deal with payloads that cross a page boundary. The
previous version would not split the descriptor at such a boundary,
potentially corrupting unrelated memory.
2. Allow user-space to specify multiple packets per struct
fw_cdev_iso_packet in the same way that dual-buffer allows. This is
signaled by header_length being a multiple of header_size. This
multiple determines the number of packets. The payload size allocated
per packet is determined by dividing the total payload size by the
number of packets.
3. Make sync support work properly for packet-per-buffer.
I have tested this patch with libdc1394 by forcing my OHCI 1.1
controller to use the packet-per-buffer support instead of dual-buffer.
I would greatly appreciate testing by those who have a DV devices and
other types of iso streamers to make sure I didn't cause any
regressions.
Stefan, with this patch, I'm hoping that libdc1394 will work with all
your OHCI 1.0 controllers now.
The one bit of future work that remains for packet-per-buffer support is
the automatic compaction of short payloads that I discussed with
Kristian.
Signed-off-by: David Moore <dcm@acm.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
David Moore [Wed, 19 Dec 2007 08:09:18 +0000 (03:09 -0500)]
firewire: fw-ohci: Fix for dualbuffer three-or-more buffers
This patch fixes the problem where different OHCI 1.1 controllers behave
differently when a received iso packet straddles three or more buffers
when using the dual-buffer receive mode. Two changes are made in order
to handle this situation:
1. The packet sync DMA descriptor is given a non-zero header length and
non-zero payload length. This is because zero-payload descriptors are
not discussed in the OHCI 1.1 specs and their behavior is thus
undefined. Instead we use a header size just large enough for a single
header and a payload length of 4 bytes for this first descriptor.
2. As we process received packets in the context's tasklet, read the
packet length out of the headers. Keep track of the running total of
the packet length as "excess_bytes", so we can ignore any descriptors
where no packet starts or ends. These descriptors may not have had
their first_res_count or second_res_count fields updated by the
controller so we cannot rely on those values.
The main drawback of this patch is that the excess_bytes value might get
"out of sync" with the packet descriptors if something strange happens
to the DMA program. I'm not if such a thing could ever happen, but I
appreciate any suggestions in making it more robust.
Also, the packet-per-buffer support may need a similar fix to deal with
issue 1, but I haven't done any work on that yet.
Stefan, I'm hoping that with this patch, all your OHCI 1.1 controllers
will work properly with an unmodified version of libdc1394.
Signed-off-by: David Moore <dcm@acm.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Stefan Richter [Sun, 16 Dec 2007 19:53:13 +0000 (20:53 +0100)]
ieee1394: ohci1394: don't schedule IT tasklets on IR events
Bug noted by Pieter Palmers: Isochronous transmit tasklets were
scheduled on isochronous receive events, in addition to the proper
isochronous receive tasklets.
Stefan Richter [Sun, 16 Dec 2007 16:31:26 +0000 (17:31 +0100)]
ieee1394: sbp2: raise default transfer size limit
This patch speeds up sbp2 a little bit --- but more importantly, it
brings the behavior of sbp2 and fw-sbp2 closer to each other. Like
fw-sbp2, sbp2 now does not limit the size of single transfers to 255
sectors anymore, unless told so by a blacklist flag or by module load
parameters.
Only very old bridge chips have been known to need the 255 sectors
limit, and we have got one such chip in our hardwired blacklist. There
certainly is a danger that more bridges need that limit; but I prefer to
have this issue present in both fw-sbp2 and sbp2 rather than just one of
them.
An OXUF922 with 400GB 7200RPM disk on an S400 controller is sped up by
this patch from 22.9 to 23.5 MB/s according to hdparm. The same effect
could be achieved before by setting a higher max_sectors module
parameter. On buses which use 1394b beta mode, sbp2 and fw-sbp2 will
now achieve virtually the same bandwidth. Fw-sbp2 only remains faster
on 1394a buses due to fw-core's gap count optimization.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Nick Piggin [Wed, 5 Dec 2007 07:15:53 +0000 (18:15 +1100)]
ieee1394: nopage
Convert ieee1394 from nopage to fault.
Remove redundant vma range checks (correct resource range check is retained).
Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
James Bottomley [Tue, 15 Jan 2008 17:11:46 +0000 (11:11 -0600)]
[SCSI] remove use_sg_chaining
With the sg table code, every SCSI driver is now either chain capable
or broken (or has sg_tablesize set so chaining is never activated), so
there's no need to have a check in the host template.
Also tidy up the code by moving the scatterlist size defines into the
SCSI includes and permit the last entry of the scatterlist pools not
to be a power of two. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Boaz Harrosh [Thu, 13 Dec 2007 11:50:53 +0000 (13:50 +0200)]
[SCSI] bidirectional command support
At the block level bidi request uses req->next_rq pointer for a second
bidi_read request.
At Scsi-midlayer a second scsi_data_buffer structure is used for the
bidi_read part. This bidi scsi_data_buffer is put on
request->next_rq->special. Struct scsi_cmnd is not changed.
- Define scsi_bidi_cmnd() to return true if it is a bidi request and a
second sgtable was allocated.
- Define scsi_in()/scsi_out() to return the in or out scsi_data_buffer
from this command This API is to isolate users from the mechanics of
bidi.
- Define scsi_end_bidi_request() to do what scsi_end_request() does but
for a bidi request. This is necessary because bidi commands are a bit
tricky here. (See comments in body)
- scsi_release_buffers() will also release the bidi_read scsi_data_buffer
- scsi_io_completion() on bidi commands will now call
scsi_end_bidi_request() and return.
- The previous work done in scsi_init_io() is now done in a new
scsi_init_sgtable() (which is 99% identical to old scsi_init_io())
The new scsi_init_io() will call the above twice if needed also for
the bidi_read command. Only at this point is a command bidi.
- In scsi_error.c at scsi_eh_prep/restore_cmnd() make sure bidi-lld is not
confused by a get-sense command that looks like bidi. This is done
by puting NULL at request->next_rq, and restoring.
[jejb: update to sg_table and resolve conflicts
also update to blk-end-request and resolve conflicts]
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Boaz Harrosh [Thu, 13 Dec 2007 11:47:40 +0000 (13:47 +0200)]
[SCSI] implement scsi_data_buffer
In preparation for bidi we abstract all IO members of scsi_cmnd,
that will need to duplicate, into a substructure.
- Group all IO members of scsi_cmnd into a scsi_data_buffer
structure.
- Adjust accessors to new members.
- scsi_{alloc,free}_sgtable receive a scsi_data_buffer instead of
scsi_cmnd. And work on it.
- Adjust scsi_init_io() and scsi_release_buffers() for above
change.
- Fix other parts of scsi_lib/scsi.c to members migration. Use
accessors where appropriate.
- fix Documentation about scsi_cmnd in scsi_host.h
- scsi_error.c
* Changed needed members of struct scsi_eh_save.
* Careful considerations in scsi_eh_prep/restore_cmnd.
- sd.c and sr.c
* sd and sr would adjust IO size to align on device's block
size so code needs to change once we move to scsi_data_buff
implementation.
* Convert code to use scsi_for_each_sg
* Use data accessors where appropriate.
- tgt: convert libsrp to use scsi_data_buffer
- isd200: This driver still bangs on scsi_cmnd IO members,
so need changing
[jejb: rebased on top of sg_table patches fixed up conflicts
and used the synergy to eliminate use_sg and sg_count]
Boaz Harrosh [Fri, 14 Dec 2007 00:14:27 +0000 (16:14 -0800)]
[SCSI] tgt: use scsi_init_io instead of scsi_alloc_sgtable
If we export scsi_init_io()/scsi_release_buffers() instead of
scsi_{alloc,free}_sgtable() from scsi_lib than tgt code is much more
insulated from scsi_lib changes. As a bonus it will also gain bidi
capability when it comes.
[jejb: rebase on to sg_table and fix up rejections]
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
FUJITA Tomonori [Sat, 26 Jan 2008 15:08:19 +0000 (00:08 +0900)]
[SCSI] aic7xxx: fix warnings with CONFIG_PM disabled
CC [M] drivers/scsi/aic7xxx/aic7xxx_osm_pci.o
drivers/scsi/aic7xxx/aic7xxx_osm_pci.c:148: warning: 'ahc_linux_pci_dev_suspend' defined but not used
drivers/scsi/aic7xxx/aic7xxx_osm_pci.c:166: warning: 'ahc_linux_pci_dev_resume' defined but not used
This moves aic7xxx_pci_driver struct, removes some forward declarations,
and adds some ifdef CONFIG_PM.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
FUJITA Tomonori [Sat, 26 Jan 2008 15:08:18 +0000 (00:08 +0900)]
[SCSI] aic79xx: fix warnings with CONFIG_PM disabled
CC [M] drivers/scsi/aic7xxx/aic79xx_osm_pci.o
drivers/scsi/aic7xxx/aic79xx_osm_pci.c:101: warning: 'ahd_linux_pci_dev_suspend' defined but not used
drivers/scsi/aic7xxx/aic79xx_osm_pci.c:121: warning: 'ahd_linux_pci_dev_resume' defined but not used
This moves aic79xx_pci_driver struct, removes some forward
declarations, and adds some ifdef CONFIG_PM.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
[SCSI] sgiwd93: use cached memory access to make driver work on IP28
SGI IP28 machines would need special treatment (enable adding addtional
wait states) when accessing memory uncached. To avoid this pain I
changed the driver to use only cached access to memory.
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
FUJITA Tomonori [Sun, 27 Jan 2008 03:41:50 +0000 (12:41 +0900)]
[SCSI] zfcp: fix sense_buffer access bug
The commit de25deb18016f66dcdede165d07654559bb332bc changed
scsi_cmnd.sense_buffer from a static array to a dynamically allocated
buffer. We can't access to sense_buffer in '&cmd->sense_buffer' way.
FUJITA Tomonori [Sun, 27 Jan 2008 03:41:51 +0000 (12:41 +0900)]
[SCSI] ncr53c8xx: fix sense_buffer access bug
The commit de25deb18016f66dcdede165d07654559bb332bc changed
scsi_cmnd.sense_buffer from a static array to a dynamically allocated
buffer. We can't access to sense_buffer in '&cmd->sense_buffer' way.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
FUJITA Tomonori [Sun, 27 Jan 2008 03:41:09 +0000 (12:41 +0900)]
[SCSI] aic79xx: fix sense_buffer access bug
The commit de25deb18016f66dcdede165d07654559bb332bc changed
scsi_cmnd.sense_buffer from a static array to a dynamically allocated
buffer. We can't access to sense_buffer in '&cmd->sense_buffer' way.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Patrick Caulfeld [Thu, 17 Jan 2008 10:25:28 +0000 (10:25 +0000)]
dlm: Sanity check namelen before copying it
The 32/64 compatibility code in the DLM does not check the validity of
the lock name length passed into it, so it can easily overwrite memory
if the value is rubbish (as early versions of libdlm can cause with
unlock calls, it doesn't zero the field).
This patch restricts the length of the name to the amount of data
actually passed into the call.
Signed-off-by: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: David Teigland <teigland@redhat.com>
David Teigland [Wed, 16 Jan 2008 19:02:31 +0000 (13:02 -0600)]
dlm: keep cached master rsbs during recovery
To prevent the master of an rsb from changing rapidly, an unused rsb is kept
on the "toss list" for a period of time to be reused. The toss list was
being cleared completely for each recovery, which is unnecessary. Much of
the benefit of the toss list can be maintained if nodes keep rsb's in their
toss list that they are the master of. These rsb's need to be included
when the resource directory is rebuilt during recovery.
Signed-off-by: David Teigland <teigland@redhat.com>
David Teigland [Wed, 9 Jan 2008 16:37:39 +0000 (10:37 -0600)]
dlm: limit dir lookup loop
In a rare case we may need to repeat a local resource directory lookup
due to a race with removing the rsb and removing the resdir record.
We'll never need to do more than a single additional lookup, though,
so the infinite loop around the lookup can be removed. In addition
to being unnecessary, the infinite loop is dangerous since some other
unknown condition may appear causing the loop to never break.
Signed-off-by: David Teigland <teigland@redhat.com>
David Teigland [Wed, 9 Jan 2008 15:59:41 +0000 (09:59 -0600)]
dlm: validate messages before processing
There was some hit and miss validation of messages that has now been
cleaned up and unified. Before processing a message, the new
validate_message() function checks that the lkb is the appropriate type,
process-copy or master-copy, and that the message is from the correct
nodeid for the the given lkb. Other checks and assertions on the
lkb type and nodeid have been removed. The assertions were particularly
bad since they would panic the machine instead of just ignoring the bad
message.
Although other recent patches have made processing old message unlikely,
it still may be possible for an old message to be processed and caught
by these checks.
Signed-off-by: David Teigland <teigland@redhat.com>
David Teigland [Tue, 8 Jan 2008 22:24:00 +0000 (16:24 -0600)]
dlm: reject messages from non-members
Messages from nodes that are no longer members of the lockspace should be
ignored. When nodes are removed from the lockspace, recovery can
sometimes complete quickly enough that messages arrive from a removed node
after recovery has completed. When processed, these messages would often
cause an error message, and could in some cases change some state, causing
problems.
Signed-off-by: David Teigland <teigland@redhat.com>
David Teigland [Tue, 8 Jan 2008 21:37:47 +0000 (15:37 -0600)]
dlm: another call to confirm_master in receive_request_reply
When a failed request (EBADR or ENOTBLK) is unlocked/canceled instead of
retried, there may be other lkb's waiting on the rsb_lookup list for it
to complete. A call to confirm_master() is needed to move on to the next
waiting lkb since the current one won't be retried.
Signed-off-by: David Teigland <teigland@redhat.com>
David Teigland [Mon, 7 Jan 2008 22:15:05 +0000 (16:15 -0600)]
dlm: recover locks waiting for overlap replies
When recovery looks at locks waiting for replies, it fails to consider
locks that have already received a reply for their first remote operation,
but not received a reply for secondary, overlapping unlock/cancel. The
appropriate stub reply needs to be called for these waiters.
Appears when we start doing recovery in the presence of a many overlapping
unlock/cancel ops.
Signed-off-by: David Teigland <teigland@redhat.com>
David Teigland [Mon, 7 Jan 2008 21:55:18 +0000 (15:55 -0600)]
dlm: clear ast_type when removing from astqueue
The lkb_ast_type field indicates whether the lkb is on the astqueue list.
When clearing locks for a process, lkb's were being removed from the astqueue
list without clearing the field. If release_lockspace then happened
immediately afterward, it could try to remove the lkb from the list a second
time.
Appears when process calls libdlm dlm_release_lockspace() which first
closes the ls dev triggering clear_proc_locks, and then removes the ls
(a write to control dev) causing release_lockspace().
Signed-off-by: David Teigland <teigland@redhat.com>
David Teigland [Tue, 15 Jan 2008 21:43:24 +0000 (15:43 -0600)]
dlm: use fixed errno values in messages
Some errno values differ across platforms. So if we return things like
-EINPROGRESS from one node it can get misinterpreted or rejected on
another one.
This patch fixes up the errno values passed on the wire so that they
match the x86 ones (so as not to break the protocol), and re-instates
the platform-specific ones at the other end.
Many thanks to Fabio for testing this patch.
Initial patch from Patrick.
Signed-off-by: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Fabio M. Di Nitto <fabbione@ubuntu.com> Signed-off-by: David Teigland <teigland@redhat.com>
Avi Kivity [Wed, 16 Jan 2008 10:49:30 +0000 (12:49 +0200)]
KVM: Move apic timer migration away from critical section
Migrating the apic timer in the critical section is not very nice, and is
absolutely horrible with the real-time port. Move migration to the regular
vcpu execution path, triggered by a new bitflag.
Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Avi Kivity <avi@qumranet.com>
kvm_para.h potentially contains definitions that are to be used by userspace,
so it should not be included inside the __KERNEL__ block. To protect its own
data structures, kvm_para.h already includes its own __KERNEL__ block.
Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Acked-by: Amit Shah <amit.shah@qumranet.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
Avi Kivity [Tue, 15 Jan 2008 16:27:32 +0000 (18:27 +0200)]
KVM: Fix unbounded preemption latency
When preparing to enter the guest, if an interrupt comes in while
preemption is disabled but interrupts are still enabled, we miss a
preemption point. Fix by explicitly checking whether we need to
reschedule.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Avi Kivity <avi@qumranet.com>
Izik Eidus [Sat, 12 Jan 2008 21:49:09 +0000 (23:49 +0200)]
KVM: MMU: Fix dirty page setting for pages removed from rmap
Right now rmap_remove won't set the page as dirty if the shadow pte
pointed to this page had write access and then it became readonly.
This patches fixes that, by setting the page as dirty for spte changes from
write to readonly access.
Signed-off-by: Izik Eidus <izike@qumranet.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
Sheng Yang [Wed, 2 Jan 2008 06:49:22 +0000 (14:49 +0800)]
KVM: x86 emulator: Only allow VMCALL/VMMCALL trapped by #UD
When executing a test program called "crashme", we found the KVM guest cannot
survive more than ten seconds, then encounterd kernel panic. The basic concept
of "crashme" is generating random assembly code and trying to execute it.
After some fixes on emulator insn validity judgment, we found it's hard to
get the current emulator handle the invalid instructions correctly, for the
#UD trap for hypercall patching caused troubles. The problem is, if the opcode
itself was OK, but combination of opcode and modrm_reg was invalid, and one
operand of the opcode was memory (SrcMem or DstMem), the emulator will fetch
the memory operand first rather than checking the validity, and may encounter
an error there. For example, ".byte 0xfe, 0x34, 0xcd" has this problem.
In the patch, we simply check that if the invalid opcode wasn't vmcall/vmmcall,
then return from emulate_instruction() and inject a #UD to guest. With the
patch, the guest had been running for more than 12 hours.
Signed-off-by: Feng (Eric) Liu <eric.e.liu@intel.com> Signed-off-by: Sheng Yang <sheng.yang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
Avi Kivity [Mon, 31 Dec 2007 13:27:49 +0000 (15:27 +0200)]
KVM: MMU: Move kvm_free_some_pages() into critical section
If some other cpu steals mmu pages between our check and an attempt to
allocate, we can run out of mmu pages. Fix by moving the check into the
same critical section as the allocation.
Avi Kivity [Sun, 30 Dec 2007 10:29:05 +0000 (12:29 +0200)]
KVM: MMU: Avoid calling gfn_to_page() in mmu_set_spte()
Since gfn_to_page() is a sleeping function, and we want to make the core mmu
spinlocked, we need to pass the page from the walker context (which can sleep)
to the shadow context (which cannot).
Marcelo Tosatti [Fri, 21 Dec 2007 00:18:22 +0000 (19:18 -0500)]
KVM: MMU: Concurrent guest walkers
Do not hold kvm->lock mutex across the entire pagefault code,
only acquire it in places where it is necessary, such as mmu
hash list, active list, rmap and parent pte handling.
Allow concurrent guest walkers by switching walk_addr() to use
mmap_sem in read-mode.
And get rid of the lockless __gfn_to_page.
[avi: move kvm_mmu_pte_write() locking inside the function]
[avi: add locking for real mode]
[avi: fix cmpxchg locking]
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
Avi Kivity [Thu, 25 Oct 2007 14:52:32 +0000 (16:52 +0200)]
KVM: Accelerated apic support
This adds a mechanism for exposing the virtual apic tpr to the guest, and a
protocol for letting the guest update the tpr without causing a vmexit if
conditions allow (e.g. there is no interrupt pending with a higher priority
than the new tpr).
projects / linux-2.6 / log