platform/kernel/linux-exynos.git
7 years agocrypto: testmgr - Allow ecb(cipher_null) in FIPS mode
Milan Broz [Fri, 21 Apr 2017 11:03:06 +0000 (13:03 +0200)]
crypto: testmgr - Allow ecb(cipher_null) in FIPS mode

The cipher_null is not a real cipher, FIPS mode should not restrict its use.

It is used for several tests (for example in cryptsetup testsuite) and also
temporarily for reencryption of not yet encrypted device in cryptsetup-reencrypt tool.

Problem is easily reproducible with
  cryptsetup benchmark -c null

Signed-off-by: Milan Broz <gmazyland@gmail.com>
Acked-by: Stephan Müller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agoRevert "crypto: arm64/sha - Add constant operand modifier to ASM_EXPORT"
Herbert Xu [Mon, 24 Apr 2017 08:09:50 +0000 (16:09 +0800)]
Revert "crypto: arm64/sha - Add constant operand modifier to ASM_EXPORT"

This reverts commit 42ae2922a68ac8d68927ccb052b486f34e5fba71.  It
causes a regression with older versions of gcc.  The consensus is
that this should instead be fixed in clang.

Reported-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: ccp - Disable interrupts early on unload
Gary R Hook [Thu, 20 Apr 2017 20:24:22 +0000 (15:24 -0500)]
crypto: ccp - Disable interrupts early on unload

Ensure that we disable interrupts first when shutting down
the driver.

Cc: <stable@vger.kernel.org> # 4.9.x+
Signed-off-by: Gary R Hook <ghook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: ccp - Use only the relevant interrupt bits
Gary R Hook [Thu, 20 Apr 2017 20:24:09 +0000 (15:24 -0500)]
crypto: ccp - Use only the relevant interrupt bits

Each CCP queue can product interrupts for 4 conditions:
operation complete, queue empty, error, and queue stopped.
This driver only works with completion and error events.

Cc: <stable@vger.kernel.org> # 4.9.x+
Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agohwrng: mtk - Add driver for hardware random generator on MT7623 SoC
Sean Wang [Thu, 20 Apr 2017 16:24:26 +0000 (00:24 +0800)]
hwrng: mtk - Add driver for hardware random generator on MT7623 SoC

This patch adds support for hardware random generator on MT7623 SoC
and should also work on other similar Mediatek SoCs. Currently,
the driver is already tested successfully with rng-tools.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Reviewed-by: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agodt-bindings: hwrng: Add Mediatek hardware random generator bindings
Sean Wang [Thu, 20 Apr 2017 16:24:25 +0000 (00:24 +0800)]
dt-bindings: hwrng: Add Mediatek hardware random generator bindings

Document the devicetree bindings for Mediatek random number
generator which could be found on MT7623 SoC or other similar
Mediatek SoCs.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: crct10dif-vpmsum - Fix missing preempt_disable()
Michael Ellerman [Thu, 20 Apr 2017 05:35:09 +0000 (15:35 +1000)]
crypto: crct10dif-vpmsum - Fix missing preempt_disable()

In crct10dif_vpmsum() we call enable_kernel_altivec() without first
disabling preemption, which is not allowed.

It used to be sufficient just to call pagefault_disable(), because that
also disabled preemption. But the two were decoupled in commit 8222dbe21e79
("sched/preempt, mm/fault: Decouple preemption from the page fault
logic") in mid 2015.

The crct10dif-vpmsum code inherited this bug from the crc32c-vpmsum code
on which it was modelled.

So add the missing preempt_disable/enable(). We should also call
disable_kernel_fp(), although it does nothing by default, there is a
debug switch to make it active and all enables should be paired with
disables.

Fixes: b01df1c16c9a ("crypto: powerpc - Add CRC-T10DIF acceleration")
Acked-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: testmgr - replace compression known answer test
Giovanni Cabiddu [Wed, 19 Apr 2017 13:27:18 +0000 (14:27 +0100)]
crypto: testmgr - replace compression known answer test

Compression implementations might return valid outputs that
do not match what specified in the test vectors.
For this reason, the testmgr might report that a compression
implementation failed the test even if the data produced
by the compressor is correct.
This implements a decompress-and-verify test for acomp
compression tests rather than a known answer test.

Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: acomp - allow registration of multiple acomps
Giovanni Cabiddu [Wed, 19 Apr 2017 13:23:05 +0000 (14:23 +0100)]
crypto: acomp - allow registration of multiple acomps

Add crypto_register_acomps and crypto_unregister_acomps to allow
the registration of multiple implementations with one call.

Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agohwrng: n2 - Use devm_kcalloc() in n2rng_probe()
Markus Elfring [Wed, 19 Apr 2017 08:30:47 +0000 (10:30 +0200)]
hwrng: n2 - Use devm_kcalloc() in n2rng_probe()

* A multiplication for the size determination of a memory allocation
  indicated that an array data structure should be processed.
  Thus use the corresponding function "devm_kcalloc".

* Replace the specification of a data structure by a pointer dereference
  to make the corresponding size determination a bit safer according to
  the Linux coding style convention.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: chcr - Fix error handling related to 'chcr_alloc_shash'
Christophe Jaillet [Thu, 13 Apr 2017 18:25:15 +0000 (20:25 +0200)]
crypto: chcr - Fix error handling related to 'chcr_alloc_shash'

Up to now, 'crypto_alloc_shash()' may return a valid pointer, an error
pointer or NULL (in case of invalid parameter)
Update it to always return an error pointer in case of error. It now
returns ERR_PTR(-EINVAL) instead of NULL in case of invalid parameter.

This simplifies error handling.

Also fix a crash in 'chcr_authenc_setkey()' if 'chcr_alloc_shash()'
returns an error pointer and the "goto out" path is taken.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agopadata: get_next is never NULL
Jason A. Donenfeld [Wed, 12 Apr 2017 08:40:19 +0000 (10:40 +0200)]
padata: get_next is never NULL

Per Dan's static checker warning, the code that returns NULL was removed
in 2010, so this patch updates the comments and fixes the code
assumptions.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: exynos - Add new Exynos RNG driver
Krzysztof Kozlowski [Tue, 11 Apr 2017 18:08:35 +0000 (20:08 +0200)]
crypto: exynos - Add new Exynos RNG driver

Replace existing hw_ranndom/exynos-rng driver with a new, reworked one.
This is a driver for pseudo random number generator block which on
Exynos4 chipsets must be seeded with some value.  On newer Exynos5420
chipsets it might seed itself from true random number generator block
but this is not implemented yet.

New driver is a complete rework to use the crypto ALGAPI instead of
hw_random API.  Rationale for the change:
1. hw_random interface is for true RNG devices.
2. The old driver was seeding itself with jiffies which is not a
   reliable source for randomness.
3. Device generates five random 32-bit numbers in each pass but old
   driver was returning only one 32-bit number thus its performance was
   reduced.

Compatibility with DeviceTree bindings is preserved.

New driver does not use runtime power management but manually enables
and disables the clock when needed.  This is preferred approach because
using runtime PM just to toggle clock is huge overhead.

Another difference is reseeding itself with generated random data
periodically and during resuming from system suspend (previously driver
was re-seeding itself again with jiffies).

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Stephan Müller <smueller@chronox.de>
Reviewed-by: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agolinux/kernel.h: Add ALIGN_DOWN macro
Krzysztof Kozlowski [Tue, 11 Apr 2017 18:08:34 +0000 (20:08 +0200)]
linux/kernel.h: Add ALIGN_DOWN macro

Few parts of kernel define their own macro for aligning down so provide
a common define for this, with the same usage and assumptions as existing
ALIGN.

Convert also three existing implementations to this one.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: caam - fix error return code in caam_qi_init()
Wei Yongjun [Tue, 11 Apr 2017 16:04:09 +0000 (16:04 +0000)]
crypto: caam - fix error return code in caam_qi_init()

Fix to return error code -ENOMEM from the kmem_cache_create() error
handling case instead of 0(err is 0 here), as done elsewhere in this
function.

Fixes: 67c2315def06 ("crypto: caam - add Queue Interface (QI) backend support")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: chcr - Add fallback for AEAD algos
Harsh Jain [Mon, 10 Apr 2017 12:54:01 +0000 (18:24 +0530)]
crypto: chcr - Add fallback for AEAD algos

Fallback to sw when
    I AAD length greater than 511
    II Zero length payload
    II No of sg entries exceeds Request size.

Signed-off-by: Harsh Jain <harsh@chelsio.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: chcr - Fix txq ids.
Harsh Jain [Mon, 10 Apr 2017 12:54:00 +0000 (18:24 +0530)]
crypto: chcr - Fix txq ids.

The patch fixes a critical issue to map txqid with flows on the hardware appropriately,
if tx queues created are more than flows configured then  txqid shall map within
the range of hardware flows configured. This ensure that un-mapped txqid does not remain un-handled.
The patch also segregated the rxqid and txqid for clarity.

Signed-off-by: Atul Gupta <atul.gupta@chelsio.com>
Reviewed-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: chcr - Set hmac_ctrl bit to use HW register HMAC_CFG[456]
Harsh Jain [Mon, 10 Apr 2017 12:53:59 +0000 (18:23 +0530)]
crypto: chcr - Set hmac_ctrl bit to use HW register HMAC_CFG[456]

Use hmac_ctrl bit value saved in setauthsize callback.

Signed-off-by: Harsh Jain <harsh@chelsio.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: chcr - Increase priority of AEAD algos.
Harsh Jain [Mon, 10 Apr 2017 12:53:58 +0000 (18:23 +0530)]
crypto: chcr - Increase priority of AEAD algos.

templates(gcm,ccm etc) inherit priority value of driver to
calculate its priority. In some cases template priority becomes
 more than driver priority for same algo.
Without this patch we will not be able to use driver authenc algos. It will
be good if it pushed in stable kernel.

Signed-off-by: Harsh Jain <harsh@chelsio.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: lz4 - fixed decompress function to return error code
Myungho Jung [Mon, 10 Apr 2017 00:34:22 +0000 (17:34 -0700)]
crypto: lz4 - fixed decompress function to return error code

Decompress function in LZ4 library is supposed to return an error code or
negative result. But, it returns -1 when any error is detected. Return
error code when the library returns negative value.

Signed-off-by: Myungho Jung <mhjungk@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agopadata: free correct variable
Jason A. Donenfeld [Fri, 7 Apr 2017 00:33:30 +0000 (02:33 +0200)]
padata: free correct variable

The author meant to free the variable that was just allocated, instead
of the one that failed to be allocated, but made a simple typo. This
patch rectifies that.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: stable@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: api - Extend algorithm name limit to 128 bytes
Herbert Xu [Thu, 6 Apr 2017 08:16:11 +0000 (16:16 +0800)]
crypto: api - Extend algorithm name limit to 128 bytes

With the new explicit IV generators, we may now exceed the 64-byte
length limit on the algorithm name, e.g., with

echainiv(authencesn(hmac(sha256-generic),cbc(des3_ede-generic)))

This patch extends the length limit to 128 bytes.

Reported-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Tested-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
7 years agoxfrm: Prepare for CRYPTO_MAX_ALG_NAME expansion
Herbert Xu [Thu, 6 Apr 2017 08:16:10 +0000 (16:16 +0800)]
xfrm: Prepare for CRYPTO_MAX_ALG_NAME expansion

This patch fixes the xfrm_user code to use the actual array size
rather than the hard-coded CRYPTO_MAX_ALG_NAME length.  This is
because the array size is fixed at 64 bytes while we want to increase
the in-kernel CRYPTO_MAX_ALG_NAME value.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Tested-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
7 years agocrypto: af_alg - Allow arbitrarily long algorithm names
Herbert Xu [Thu, 6 Apr 2017 08:16:09 +0000 (16:16 +0800)]
crypto: af_alg - Allow arbitrarily long algorithm names

This patch removes the hard-coded 64-byte limit on the length
of the algorithm name through bind(2).  The address length can
now exceed that.  The user-space structure remains unchanged.
In order to use a longer name simply extend the salg_name array
beyond its defined 64 bytes length.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: user - Prepare for CRYPTO_MAX_ALG_NAME expansion
Herbert Xu [Thu, 6 Apr 2017 08:16:08 +0000 (16:16 +0800)]
crypto: user - Prepare for CRYPTO_MAX_ALG_NAME expansion

This patch hard-codes CRYPTO_MAX_NAME in the user-space API to
64, which is the current value of CRYPTO_MAX_ALG_NAME.  This patch
also replaces all remaining occurences of CRYPTO_MAX_ALG_NAME
in the user-space API with CRYPTO_MAX_NAME.

This way the user-space API will not be modified when we raise
the value of CRYPTO_MAX_ALG_NAME.

Furthermore, the code has been updated to handle names longer than
the user-space API.  They will be truncated.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Tested-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
7 years agohwrng: timeriomem - Improve performance for sub-jiffie update periods
Rick Altherr [Wed, 5 Apr 2017 23:21:00 +0000 (16:21 -0700)]
hwrng: timeriomem - Improve performance for sub-jiffie update periods

Some hardware RNGs provide a single register for obtaining random data.
Instead of signaling when new data is available, the reader must wait a
fixed amount of time between reads for new data to be generated.
timeriomem_rng implements this scheme with the period specified in
platform data or device tree.  While the period is specified in
microseconds, the implementation used a standard timer which has a
minimum delay of 1 jiffie and caused a significant bottleneck for
devices that can update at 1us.  By switching to an hrtimer, 1us periods
now only delay at most 2us per read.

Signed-off-by: Rick Altherr <raltherr@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agohwrng: timeriomem - Shorten verbose type and variable names
Rick Altherr [Wed, 5 Apr 2017 23:20:59 +0000 (16:20 -0700)]
hwrng: timeriomem - Shorten verbose type and variable names

No functional changes.

Signed-off-by: Rick Altherr <raltherr@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agohwrng: timeriomem - Migrate to new API
Rick Altherr [Wed, 5 Apr 2017 23:20:58 +0000 (16:20 -0700)]
hwrng: timeriomem - Migrate to new API

Preserves the existing behavior of only returning 32-bits per call.

Signed-off-by: Rick Altherr <raltherr@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: arm64/sha - Add constant operand modifier to ASM_EXPORT
Matthias Kaehlcke [Wed, 5 Apr 2017 18:34:58 +0000 (11:34 -0700)]
crypto: arm64/sha - Add constant operand modifier to ASM_EXPORT

The operand is an integer constant, make the constness explicit by
adding the modifier. This is needed for clang to generate valid code
and also works with gcc.

Also change the constraint of the operand from 'I' ("Integer constant
that is valid as an immediate operand in an ADD instruction", AArch64)
to 'i' ("An immediate integer operand").

Based-on-patch-from: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: xts - drop gf128mul dependency
Ondrej Mosnáček [Sun, 2 Apr 2017 19:19:16 +0000 (21:19 +0200)]
crypto: xts - drop gf128mul dependency

Since the gf128mul_x_ble function used by xts.c is now defined inline
in the header file, the XTS module no longer depends on gf128mul.
Therefore, the 'select CRYPTO_GF128MUL' line can be safely removed.

Signed-off-by: Ondrej Mosnacek <omosnacek@gmail.com>
Reviewd-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: glue_helper - remove the le128_gf128mul_x_ble function
Ondrej Mosnáček [Sun, 2 Apr 2017 19:19:15 +0000 (21:19 +0200)]
crypto: glue_helper - remove the le128_gf128mul_x_ble function

The le128_gf128mul_x_ble function in glue_helper.h is now obsolete and
can be replaced with the gf128mul_x_ble function from gf128mul.h.

Signed-off-by: Ondrej Mosnacek <omosnacek@gmail.com>
Reviewd-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: gf128mul - switch gf128mul_x_ble to le128
Ondrej Mosnáček [Sun, 2 Apr 2017 19:19:14 +0000 (21:19 +0200)]
crypto: gf128mul - switch gf128mul_x_ble to le128

Currently, gf128mul_x_ble works with pointers to be128, even though it
actually interprets the words as little-endian. Consequently, it uses
cpu_to_le64/le64_to_cpu on fields of type __be64, which is incorrect.

This patch fixes that by changing the function to accept pointers to
le128 and updating all users accordingly.

Signed-off-by: Ondrej Mosnacek <omosnacek@gmail.com>
Reviewd-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: gf128mul - define gf128mul_x_* in gf128mul.h
Ondrej Mosnáček [Sun, 2 Apr 2017 19:19:13 +0000 (21:19 +0200)]
crypto: gf128mul - define gf128mul_x_* in gf128mul.h

The gf128mul_x_ble function is currently defined in gf128mul.c, because
it depends on the gf128mul_table_be multiplication table.

However, since the function is very small and only uses two values from
the table, it is better for it to be defined as inline function in
gf128mul.h. That way, the function can be inlined by the compiler for
better performance.

For consistency, the other gf128mul_x_* functions are also moved to the
header file. In addition, the code is rewritten to be constant-time.

After this change, the speed of the generic 'xts(aes)' implementation
increased from ~225 MiB/s to ~235 MiB/s (measured using 'cryptsetup
benchmark -c aes-xts-plain64' on an Intel system with CRYPTO_AES_X86_64
and CRYPTO_AES_NI_INTEL disabled).

Signed-off-by: Ondrej Mosnacek <omosnacek@gmail.com>
Reviewd-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: nx - Update MAINTAINERS entry for 842 compression
Haren Myneni [Sat, 1 Apr 2017 17:25:40 +0000 (10:25 -0700)]
crypto: nx - Update MAINTAINERS entry for 842 compression

Signed-off-by: Haren Myneni <haren@us.ibm.com>
Acked-by: Dan Streetman <ddstreet@ieee.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: ccp - Rearrange structure members to minimize size
Gary R Hook [Tue, 28 Mar 2017 15:57:26 +0000 (10:57 -0500)]
crypto: ccp - Rearrange structure members to minimize size

The AES GCM function (in ccp-ops) requires a fair amount of
stack space, which elicits a complaint when KASAN is enabled.
Rearranging and packing a few structures eliminates the
warning.

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: ccp - Remove redundant cpu-to-le32 macros
Gary R Hook [Tue, 28 Mar 2017 13:58:28 +0000 (08:58 -0500)]
crypto: ccp - Remove redundant cpu-to-le32 macros

Endianness is dealt with when the command descriptor is
copied into the command queue. Remove any occurrences of
cpu_to_le32() found elsewhere.

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agoARM: configs: stm32: Add crypto support
Fabien DESSENNE [Tue, 21 Mar 2017 15:13:31 +0000 (16:13 +0100)]
ARM: configs: stm32: Add crypto support

Add STM32 crypto support in stm32_defconfig file.

Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agoARM: dts: stm32: enable CRC on stm32746g-eval board
Fabien DESSENNE [Tue, 21 Mar 2017 15:13:30 +0000 (16:13 +0100)]
ARM: dts: stm32: enable CRC on stm32746g-eval board

Enable the CRC (CRC32 crypto) on stm32746g-eval board

Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agoARM: dts: stm32: Add CRC support to stm32f746
Fabien DESSENNE [Tue, 21 Mar 2017 15:13:29 +0000 (16:13 +0100)]
ARM: dts: stm32: Add CRC support to stm32f746

Add CRC (CRC32 crypto) support to stm32f746.

Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: stm32 - Support for STM32 CRC32 crypto module
Fabien DESSENNE [Tue, 21 Mar 2017 15:13:28 +0000 (16:13 +0100)]
crypto: stm32 - Support for STM32 CRC32 crypto module

This module registers a CRC32 ("Ethernet") and a CRC32C (Castagnoli)
algorithm that make use of the STMicroelectronics STM32 crypto hardware.

Theses algorithms are compatible with the little-endian generic ones.
Both algorithms use ~0 as default seed (key).
With CRC32C the output is xored with ~0.

Using TCRYPT CRC32C speed test, this shows up to 900% speedup compared
to the crc32c-generic algorithm.

Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agodt-bindings: Document STM32 CRC bindings
Fabien DESSENNE [Tue, 21 Mar 2017 15:13:27 +0000 (16:13 +0100)]
dt-bindings: Document STM32 CRC bindings

Document device tree bindings for the STM32 CRC (crypto CRC32)

Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Herbert Xu [Wed, 5 Apr 2017 13:57:07 +0000 (21:57 +0800)]
Merge git://git./linux/kernel/git/herbert/crypto-2.6

Merge the crypto tree to resolve conflict between caam changes.

7 years agocrypto: caam - fix RNG deinstantiation error checking
Horia Geantă [Wed, 5 Apr 2017 08:41:03 +0000 (11:41 +0300)]
crypto: caam - fix RNG deinstantiation error checking

RNG instantiation was previously fixed by
commit 62743a4145bb9 ("crypto: caam - fix RNG init descriptor ret. code checking")
while deinstantiation was not addressed.

Since the descriptors used are similar, in the sense that they both end
with a JUMP HALT command, checking for errors should be similar too,
i.e. status code 7000_0000h should be considered successful.

Cc: <stable@vger.kernel.org> # 3.13+
Fixes: 1005bccd7a4a6 ("crypto: caam - enable instantiation of all RNG4 state handles")
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: caam - fix invalid dereference in caam_rsa_init_tfm()
Horia Geantă [Mon, 3 Apr 2017 15:30:07 +0000 (18:30 +0300)]
crypto: caam - fix invalid dereference in caam_rsa_init_tfm()

In case caam_jr_alloc() fails, ctx->dev carries the error code,
thus accessing it with dev_err() is incorrect.

Cc: <stable@vger.kernel.org> # 4.8+
Fixes: 8c419778ab57e ("crypto: caam - add support for RSA algorithm")
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: caam - fix JR platform device subsequent (re)creations
Horia Geantă [Mon, 3 Apr 2017 15:12:04 +0000 (18:12 +0300)]
crypto: caam - fix JR platform device subsequent (re)creations

The way Job Ring platform devices are created and released does not
allow for multiple create-release cycles.

JR0 Platform device creation error
JR0 Platform device creation error
caam 2100000.caam: no queues configured, terminating
caam: probe of 2100000.caam failed with error -12

The reason is that platform devices are created for each job ring:

        for_each_available_child_of_node(nprop, np)
                if (of_device_is_compatible(np, "fsl,sec-v4.0-job-ring") ||
                    of_device_is_compatible(np, "fsl,sec4.0-job-ring")) {
                        ctrlpriv->jrpdev[ring] =
                                of_platform_device_create(np, NULL, dev);

which sets OF_POPULATED on the device node, but then it cleans these up:

        /* Remove platform devices for JobRs */
        for (ring = 0; ring < ctrlpriv->total_jobrs; ring++) {
                if (ctrlpriv->jrpdev[ring])
                        of_device_unregister(ctrlpriv->jrpdev[ring]);
        }

which leaves OF_POPULATED set.

Use of_platform_populate / of_platform_depopulate instead.
This allows for a bit of driver clean-up, jrpdev is no longer needed.

Logic changes a bit too:
-exit in case of_platform_populate fails, since currently even QI backend
depends on JR; true, we no longer support the case when "some" of the JR
DT nodes are incorrect
-when cleaning up, caam_remove() would also depopulate RTIC in case
it would have been populated somewhere else - not the case for now

Cc: <stable@vger.kernel.org>
Fixes: 313ea293e9c4d ("crypto: caam - Add Platform driver for Job Ring")
Reported-by: Russell King <rmk+kernel@armlinux.org.uk>
Suggested-by: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: ixp4xx - Use sg_virt()
Geliang Tang [Thu, 23 Mar 2017 13:16:30 +0000 (21:16 +0800)]
crypto: ixp4xx - Use sg_virt()

Use sg_virt() instead of open-coding it.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: DRBG - initialize SGL only once
Stephan Mueller [Wed, 22 Mar 2017 14:26:36 +0000 (15:26 +0100)]
crypto: DRBG - initialize SGL only once

An SGL to be initialized only once even when its buffers are written
to several times.

Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: testmgr - mark ctr(des3_ede) as fips_allowed
Marcelo Cerri [Mon, 20 Mar 2017 20:28:05 +0000 (17:28 -0300)]
crypto: testmgr - mark ctr(des3_ede) as fips_allowed

3DES is missing the fips_allowed flag for CTR mode.

Signed-off-by: Marcelo Henrique Cerri <marcelo.cerri@canonical.com>
Acked-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: zip - add a cast for printing atomic64_t values
Arnd Bergmann [Mon, 20 Mar 2017 12:39:16 +0000 (13:39 +0100)]
crypto: zip - add a cast for printing atomic64_t values

kernelci.org reports a build-time regression on linux-next, with a harmless
warning in x86 allmodconfig:

drivers/crypto/cavium/zip/zip_main.c:489:18: warning: format '%ld' expects argument of type 'long int', but argument 7 has type 'long long int' [-Wformat=]
drivers/crypto/cavium/zip/zip_main.c:489:18: warning: format '%ld' expects argument of type 'long int', but argument 6 has type 'long long int' [-Wformat=]
drivers/crypto/cavium/zip/zip_main.c:489:18: warning: format '%ld' expects argument of type 'long int', but argument 5 has type 'long long int' [-Wformat=]

The return type for atomic64_read() unfortunately differs between
architectures, with some defining it as atomic_long_read() and others
returning a 64-bit type explicitly. Fixing this in general would be nice,
but also require changing other users of these functions, so the simpler
workaround is to add a cast here that avoids the warnings on the default
build.

Fixes: 09ae5d37e093 ("crypto: zip - Add Compression/Decompression statistics")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: zip - Memory corruption in zip_clear_stats()
Dan Carpenter [Fri, 17 Mar 2017 20:46:21 +0000 (23:46 +0300)]
crypto: zip - Memory corruption in zip_clear_stats()

There is a typo here.  It should be "stats" instead of "state".  The
impact is that we clear 224 bytes instead of 80 and we zero out memory
that we shouldn't.

Fixes: 09ae5d37e093 ("crypto: zip - Add Compression/Decompression statistics")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: s5p-sss - Document the struct s5p_aes_dev
Krzysztof Kozlowski [Fri, 17 Mar 2017 14:49:21 +0000 (16:49 +0200)]
crypto: s5p-sss - Document the struct s5p_aes_dev

Add kernel-doc to s5p_aes_dev structure.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: s5p-sss - Remove unused variant field from state container
Krzysztof Kozlowski [Fri, 17 Mar 2017 14:49:20 +0000 (16:49 +0200)]
crypto: s5p-sss - Remove unused variant field from state container

The driver uses type of device (variant) only during probe so there is
no need to store it for later.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: s5p-sss - Close possible race for completed requests
Krzysztof Kozlowski [Fri, 17 Mar 2017 14:49:19 +0000 (16:49 +0200)]
crypto: s5p-sss - Close possible race for completed requests

Driver is capable of handling only one request at a time and it stores
it in its state container struct s5p_aes_dev.  This stored request must be
protected between concurrent invocations (e.g. completing current
request and scheduling new one).  Combination of lock and "busy" field
is used for that purpose.

When "busy" field is true, the driver will not accept new request thus
it will not overwrite currently handled data.

However commit 28b62b145868 ("crypto: s5p-sss - Fix spinlock recursion
on LRW(AES)") moved some of the write to "busy" field out of a lock
protected critical section.  This might lead to potential race between
completing current request and scheduling a new one.  Effectively the
request completion might try to operate on new crypto request.

Cc: <stable@vger.kernel.org> # v4.10.x
Fixes: 28b62b145868 ("crypto: s5p-sss - Fix spinlock recursion on LRW(AES)")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: caam/qi - add ablkcipher and authenc algorithms
Horia Geantă [Fri, 17 Mar 2017 10:06:02 +0000 (12:06 +0200)]
crypto: caam/qi - add ablkcipher and authenc algorithms

Add support to submit ablkcipher and authenc algorithms
via the QI backend:
-ablkcipher:
cbc({aes,des,des3_ede})
ctr(aes), rfc3686(ctr(aes))
xts(aes)
-authenc:
authenc(hmac(md5),cbc({aes,des,des3_ede}))
authenc(hmac(sha*),cbc({aes,des,des3_ede}))

caam/qi being a new driver, let's wait some time to settle down without
interfering with existing caam/jr driver.
Accordingly, for now all caam/qi algorithms (caamalg_qi module) are
marked to be of lower priority than caam/jr ones (caamalg module).

Signed-off-by: Vakul Garg <vakul.garg@nxp.com>
Signed-off-by: Alex Porosanu <alexandru.porosanu@nxp.com>
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: caam - add Queue Interface (QI) backend support
Horia Geantă [Fri, 17 Mar 2017 10:06:01 +0000 (12:06 +0200)]
crypto: caam - add Queue Interface (QI) backend support

CAAM engine supports two interfaces for crypto job submission:
-job ring interface - already existing caam/jr driver
-Queue Interface (QI) - caam/qi driver added in current patch

QI is present in CAAM engines found on DPAA platforms.
QI gets its I/O (frame descriptors) from QMan (Queue Manager) queues.

This patch adds a platform device for accessing CAAM's queue interface.
The requests are submitted to CAAM using one frame queue per
cryptographic context. Each crypto context has one shared descriptor.
This shared descriptor is attached to frame queue associated with
corresponding driver context using context_a.

The driver hides the mechanics of FQ creation, initialisation from its
applications. Each cryptographic context needs to be associated with
driver context which houses the FQ to be used to transport the job to
CAAM. The driver provides API for:
(a) Context creation
(b) Job submission
(c) Context deletion
(d) Congestion indication - whether path to/from CAAM is congested

The driver supports affining its context to a particular CPU.
This means that any responses from CAAM for the context in question
would arrive at the given CPU. This helps in implementing one CPU
per packet round trip in IPsec application.

The driver processes CAAM responses under NAPI contexts.
NAPI contexts are instantiated only on cores with affined portals since
only cores having their own portal can receive responses from DQRR.

The responses from CAAM for all cryptographic contexts ride on a fixed
set of FQs. We use one response FQ per portal owning core. The response
FQ is configured in each core's and thus portal's dedicated channel.
This gives the flexibility to direct CAAM's responses for a crypto
context on a given core.

Signed-off-by: Vakul Garg <vakul.garg@nxp.com>
Signed-off-by: Alex Porosanu <alexandru.porosanu@nxp.com>
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: caam - avoid double inclusion in desc_constr.h
Horia Geantă [Fri, 17 Mar 2017 10:06:00 +0000 (12:06 +0200)]
crypto: caam - avoid double inclusion in desc_constr.h

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agosoc/qman: add macros needed by caam/qi driver
Horia Geantă [Fri, 17 Mar 2017 10:05:59 +0000 (12:05 +0200)]
soc/qman: add macros needed by caam/qi driver

A few other things need to be added in soc/qman, such that
caam/qi won't open-code them.

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agosoc/qman: export non-programmable FQD fields query
Horia Geantă [Fri, 17 Mar 2017 10:05:58 +0000 (12:05 +0200)]
soc/qman: export non-programmable FQD fields query

Export qman_query_fq_np() function and related structures.
This will be needed in the caam/qi driver, where "queue empty"
condition will be decided based on the frm_cnt.

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agosoc/qman: add dedicated channel ID for CAAM
Horia Geantă [Fri, 17 Mar 2017 10:05:57 +0000 (12:05 +0200)]
soc/qman: add dedicated channel ID for CAAM

Add and export the ID of the channel serviced by the
CAAM (Cryptographic Acceleration and Assurance Module) DCP.

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agosoc/qman: export volatile dequeue related structs
Horia Geantă [Fri, 17 Mar 2017 10:05:56 +0000 (12:05 +0200)]
soc/qman: export volatile dequeue related structs

Since qman_volatile_dequeue() is already exported, move the related
structures into the public header too.

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agomd5: remove from lib and only live in crypto
Jason A. Donenfeld [Thu, 16 Mar 2017 14:18:57 +0000 (15:18 +0100)]
md5: remove from lib and only live in crypto

The md5_transform function is no longer used any where in the tree,
except for the crypto api's actual implementation of md5, so we can drop
the function from lib and put it as a static function of the crypto
file, where it belongs. There should be no new users of md5_transform,
anyway, since there are more modern ways of doing what it once achieved.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto, x86: aesni - fix token pasting for clang
Michael Davidson [Wed, 15 Mar 2017 22:36:00 +0000 (15:36 -0700)]
crypto, x86: aesni - fix token pasting for clang

aes_ctrby8_avx-x86_64.S uses the C preprocessor for token pasting
of character sequences that are not valid preprocessor tokens.
While this is allowed when preprocessing assembler files it exposes
an incompatibilty between the clang and gcc preprocessors where
clang does not strip leading white space from macro parameters,
leading to the CONCAT(%xmm, i) macro expansion on line 96 resulting
in a token with a space character embedded in it.

While this could be resolved by deleting the offending space character,
the assembler is perfectly capable of doing the token pasting correctly
for itself so we can just get rid of the preprocessor macros.

Signed-off-by: Michael Davidson <md@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: ccp - Enable support for AES GCM on v5 CCPs
Gary R Hook [Wed, 15 Mar 2017 18:21:01 +0000 (13:21 -0500)]
crypto: ccp - Enable support for AES GCM on v5 CCPs

A version 5 device provides the primitive commands
required for AES GCM. This patch adds support for
en/decryption.

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: ccp - Enable 3DES function on v5 CCPs
Gary R Hook [Wed, 15 Mar 2017 18:20:52 +0000 (13:20 -0500)]
crypto: ccp - Enable 3DES function on v5 CCPs

Wire up support for Triple DES in ECB mode.

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: ccp - Add SHA-2 384- and 512-bit support
Gary R Hook [Wed, 15 Mar 2017 18:20:43 +0000 (13:20 -0500)]
crypto: ccp - Add SHA-2 384- and 512-bit support

Incorporate 384-bit and 512-bit hashing for a version 5 CCP
device

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: powerpc - Stress test for vpmsum implementations
Daniel Axtens [Wed, 15 Mar 2017 12:37:37 +0000 (23:37 +1100)]
crypto: powerpc - Stress test for vpmsum implementations

vpmsum implementations often don't kick in for short test vectors.
This is a simple test module that does a configurable number of
random tests, each up to 64kB and each with random offsets.

Both CRC-T10DIF and CRC32C are tested.

Cc: Anton Blanchard <anton@samba.org>
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: powerpc - Add CRC-T10DIF acceleration
Daniel Axtens [Wed, 15 Mar 2017 12:37:36 +0000 (23:37 +1100)]
crypto: powerpc - Add CRC-T10DIF acceleration

T10DIF is a CRC16 used heavily in NVMe.

It turns out we can accelerate it with a CRC32 library and a few
little tricks.

Provide the accelerator based the refactored CRC32 code.

Cc: Anton Blanchard <anton@samba.org>
Thanks-to: Hong Bo Peng <penghb@cn.ibm.com>
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: powerpc - Re-enable non-REFLECTed CRCs
Daniel Axtens [Wed, 15 Mar 2017 12:37:35 +0000 (23:37 +1100)]
crypto: powerpc - Re-enable non-REFLECTed CRCs

When CRC32c was included in the kernel, Anton ripped out
the #ifdefs around reflected polynomials, because CRC32c
is always reflected. However, not all CRCs use reflection
so we'd like to make it optional.

Restore the REFLECT parts from Anton's original CRC32
implementation (https://github.com/antonblanchard/crc32-vpmsum)

That implementation is available under GPLv2+, so we're OK
from a licensing point of view:
https://github.com/antonblanchard/crc32-vpmsum/blob/master/LICENSE.TXT

As CRC32c requires REFLECT, add that #define.

Cc: Anton Blanchard <anton@samba.org>
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: powerpc - Factor out the core CRC vpmsum algorithm
Daniel Axtens [Wed, 15 Mar 2017 12:37:34 +0000 (23:37 +1100)]
crypto: powerpc - Factor out the core CRC vpmsum algorithm

The core nuts and bolts of the crc32c vpmsum algorithm will
also work for a number of other CRC algorithms with different
polynomials. Factor out the function into a new asm file.

To handle multiple users of the function, a user simply
provides constants, defines the name of their CRC function,
and then #includes the core algorithm file.

Cc: Anton Blanchard <anton@samba.org>
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux
Herbert Xu [Fri, 24 Mar 2017 13:58:58 +0000 (21:58 +0800)]
Merge git://git./linux/kernel/git/torvalds/linux

Merging 4.11-rc3 to pick up md5 removal from /dev/random.

7 years agocrypto: xts,lrw - fix out-of-bounds write after kmalloc failure
Eric Biggers [Thu, 23 Mar 2017 20:39:46 +0000 (13:39 -0700)]
crypto: xts,lrw - fix out-of-bounds write after kmalloc failure

In the generic XTS and LRW algorithms, for input data > 128 bytes, a
temporary buffer is allocated to hold the values to be XOR'ed with the
data before and after encryption or decryption.  If the allocation
fails, the fixed-size buffer embedded in the request buffer is meant to
be used as a fallback --- resulting in more calls to the ECB algorithm,
but still producing the correct result.  However, we weren't correctly
limiting subreq->cryptlen in this case, resulting in pre_crypt()
overrunning the embedded buffer.  Fix this by setting subreq->cryptlen
correctly.

Fixes: f1c131b45410 ("crypto: xts - Convert to skcipher")
Fixes: 700cb3f5fe75 ("crypto: lrw - Convert to skcipher")
Cc: stable@vger.kernel.org # v4.10+
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: ccp - Make some CCP DMA channels private
Gary R Hook [Thu, 23 Mar 2017 17:53:30 +0000 (12:53 -0500)]
crypto: ccp - Make some CCP DMA channels private

The CCP registers its queues as channels capable of handling
general DMA operations. The NTB driver will use DMA if
directed, but as public channels can be reserved for use in
asynchronous operations some channels should be held back
as private. Since the public/private determination is
handled at a device level, reserve the "other" (secondary)
CCP channels as private.

Add a module parameter that allows for override, to be
applied to all channels on all devices.

CC: <stable@vger.kernel.org> # 4.10.x-
Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agopadata: avoid race in reordering
Jason A. Donenfeld [Thu, 23 Mar 2017 11:24:43 +0000 (12:24 +0100)]
padata: avoid race in reordering

Under extremely heavy uses of padata, crashes occur, and with list
debugging turned on, this happens instead:

[87487.298728] WARNING: CPU: 1 PID: 882 at lib/list_debug.c:33
__list_add+0xae/0x130
[87487.301868] list_add corruption. prev->next should be next
(ffffb17abfc043d0), but was ffff8dba70872c80. (prev=ffff8dba70872b00).
[87487.339011]  [<ffffffff9a53d075>] dump_stack+0x68/0xa3
[87487.342198]  [<ffffffff99e119a1>] ? console_unlock+0x281/0x6d0
[87487.345364]  [<ffffffff99d6b91f>] __warn+0xff/0x140
[87487.348513]  [<ffffffff99d6b9aa>] warn_slowpath_fmt+0x4a/0x50
[87487.351659]  [<ffffffff9a58b5de>] __list_add+0xae/0x130
[87487.354772]  [<ffffffff9add5094>] ? _raw_spin_lock+0x64/0x70
[87487.357915]  [<ffffffff99eefd66>] padata_reorder+0x1e6/0x420
[87487.361084]  [<ffffffff99ef0055>] padata_do_serial+0xa5/0x120

padata_reorder calls list_add_tail with the list to which its adding
locked, which seems correct:

spin_lock(&squeue->serial.lock);
list_add_tail(&padata->list, &squeue->serial.list);
spin_unlock(&squeue->serial.lock);

This therefore leaves only place where such inconsistency could occur:
if padata->list is added at the same time on two different threads.
This pdata pointer comes from the function call to
padata_get_next(pd), which has in it the following block:

next_queue = per_cpu_ptr(pd->pqueue, cpu);
padata = NULL;
reorder = &next_queue->reorder;
if (!list_empty(&reorder->list)) {
       padata = list_entry(reorder->list.next,
                           struct padata_priv, list);
       spin_lock(&reorder->lock);
       list_del_init(&padata->list);
       atomic_dec(&pd->reorder_objects);
       spin_unlock(&reorder->lock);

       pd->processed++;

       goto out;
}
out:
return padata;

I strongly suspect that the problem here is that two threads can race
on reorder list. Even though the deletion is locked, call to
list_entry is not locked, which means it's feasible that two threads
pick up the same padata object and subsequently call list_add_tail on
them at the same time. The fix is thus be hoist that lock outside of
that block.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agodt-bindings: rng: clocks property on omap_rng not always mandatory
Thomas Petazzoni [Fri, 17 Mar 2017 12:58:39 +0000 (13:58 +0100)]
dt-bindings: rng: clocks property on omap_rng not always mandatory

Commit 52060836f79 ("dt-bindings: omap-rng: Document SafeXcel IP-76
device variant") update the omap_rng Device Tree binding to add support
for the IP-76 variation of the IP. As part of this change, a "clocks"
property was added, but is indicated as "Required", without indicated
it's actually only required for some compatible strings.

This commit fixes that, by explicitly stating that the clocks property
is only required with the inside-secure,safexcel-eip76 compatible
string.

Fixes: 52060836f79 ("dt-bindings: omap-rng: Document SafeXcel IP-76 device variant")
Cc: <stable@vger.kernel.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agoLinux 4.11-rc3 v4.11-rc3
Linus Torvalds [Mon, 20 Mar 2017 02:09:39 +0000 (19:09 -0700)]
Linux 4.11-rc3

7 years agomm/swap: don't BUG_ON() due to uninitialized swap slot cache
Linus Torvalds [Mon, 20 Mar 2017 02:00:47 +0000 (19:00 -0700)]
mm/swap: don't BUG_ON() due to uninitialized swap slot cache

This BUG_ON() triggered for me once at shutdown, and I don't see a
reason for the check.  The code correctly checks whether the swap slot
cache is usable or not, so an uninitialized swap slot cache is not
actually problematic afaik.

I've temporarily just switched the BUG_ON() to a WARN_ON_ONCE(), since
I'm not sure why that seemingly pointless check was there.  I suspect
the real fix is to just remove it entirely, but for now we'll warn about
it but not bring the machine down.

Cc: "Huang, Ying" <ying.huang@intel.com>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agoMerge tag 'powerpc-4.11-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
Linus Torvalds [Mon, 20 Mar 2017 01:49:28 +0000 (18:49 -0700)]
Merge tag 'powerpc-4.11-5' of git://git./linux/kernel/git/powerpc/linux

Pull more powerpc fixes from Michael Ellerman:
 "A couple of minor powerpc fixes for 4.11:

   - wire up statx() syscall

   - don't print a warning on memory hotplug when HPT resizing isn't
     available

  Thanks to: David Gibson, Chandan Rajendra"

* tag 'powerpc-4.11-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/pseries: Don't give a warning when HPT resizing isn't available
  powerpc: Wire up statx() syscall

7 years agoMerge branch 'parisc-4.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller...
Linus Torvalds [Mon, 20 Mar 2017 01:11:13 +0000 (18:11 -0700)]
Merge branch 'parisc-4.11-2' of git://git./linux/kernel/git/deller/parisc-linux

Pull parisc fixes from Helge Deller:

 - Mikulas Patocka added support for R_PARISC_SECREL32 relocations in
   modules with CONFIG_MODVERSIONS.

 - Dave Anglin optimized the cache flushing for vmap ranges.

 - Arvind Yadav provided a fix for a potential NULL pointer dereference
   in the parisc perf code (and some code cleanups).

 - I wired up the new statx system call, fixed some compiler warnings
   with the access_ok() macro and fixed shutdown code to really halt a
   system at shutdown instead of crashing & rebooting.

* 'parisc-4.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Fix system shutdown halt
  parisc: perf: Fix potential NULL pointer dereference
  parisc: Avoid compiler warnings with access_ok()
  parisc: Wire up statx system call
  parisc: Optimize flush_kernel_vmap_range and invalidate_kernel_vmap_range
  parisc: support R_PARISC_SECREL32 relocation in modules

7 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
Linus Torvalds [Mon, 20 Mar 2017 01:06:31 +0000 (18:06 -0700)]
Merge git://git./linux/kernel/git/nab/target-pending

Pull SCSI target fixes from Nicholas Bellinger:
 "The bulk of the changes are in qla2xxx target driver code to address
  various issues found during Cavium/QLogic's internal testing (stable
  CC's included), along with a few other stability and smaller
  miscellaneous improvements.

  There are also a couple of different patch sets from Mike Christie,
  which have been a result of his work to use target-core ALUA logic
  together with tcm-user backend driver.

  Finally, a patch to address some long standing issues with
  pass-through SCSI export of TYPE_TAPE + TYPE_MEDIUM_CHANGER devices,
  which will make folks using physical (or virtual) magnetic tape happy"

* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (28 commits)
  qla2xxx: Update driver version to 9.00.00.00-k
  qla2xxx: Fix delayed response to command for loop mode/direct connect.
  qla2xxx: Change scsi host lookup method.
  qla2xxx: Add DebugFS node to display Port Database
  qla2xxx: Use IOCB interface to submit non-critical MBX.
  qla2xxx: Add async new target notification
  qla2xxx: Export DIF stats via debugfs
  qla2xxx: Improve T10-DIF/PI handling in driver.
  qla2xxx: Allow relogin to proceed if remote login did not finish
  qla2xxx: Fix sess_lock & hardware_lock lock order problem.
  qla2xxx: Fix inadequate lock protection for ABTS.
  qla2xxx: Fix request queue corruption.
  qla2xxx: Fix memory leak for abts processing
  qla2xxx: Allow vref count to timeout on vport delete.
  tcmu: Convert cmd_time_out into backend device attribute
  tcmu: make cmd timeout configurable
  tcmu: add helper to check if dev was configured
  target: fix race during implicit transition work flushes
  target: allow userspace to set state to transitioning
  target: fix ALUA transition timeout handling
  ...

7 years agoMerge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdim...
Linus Torvalds [Sun, 19 Mar 2017 22:45:02 +0000 (15:45 -0700)]
Merge branch 'libnvdimm-fixes' of git://git./linux/kernel/git/nvdimm/nvdimm

Pull device-dax fixes from Dan Williams:
 "The device-dax driver was not being careful to handle falling back to
  smaller fault-granularity sizes.

  The driver already fails fault attempts that are smaller than the
  device's alignment, but it also needs to handle the cases where a
  larger page mapping could be established. For simplicity of the
  immediate fix the implementation just signals VM_FAULT_FALLBACK until
  fault-size == device-alignment.

  One fix is for -stable to address pmd-to-pte fallback from the
  original implementation, another fix is for the new (introduced in
  4.11-rc1) pud-to-pmd regression, and a typo fix comes along for the
  ride.

  These have received a build success notification from the kbuild
  robot"

* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  device-dax: fix debug output typo
  device-dax: fix pud fault fallback handling
  device-dax: fix pmd/pte fault fallback handling

7 years agoqla2xxx: Update driver version to 9.00.00.00-k
Himanshu Madhani [Wed, 15 Mar 2017 16:48:56 +0000 (09:48 -0700)]
qla2xxx: Update driver version to 9.00.00.00-k

Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
signed-off-by: Giridhar Malavali <giridhar.malavali@cavium.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
7 years agoqla2xxx: Fix delayed response to command for loop mode/direct connect.
Quinn Tran [Wed, 15 Mar 2017 16:48:55 +0000 (09:48 -0700)]
qla2xxx: Fix delayed response to command for loop mode/direct connect.

Current driver wait for FW to be in the ready state before
processing in-coming commands. For Arbitrated Loop or
Point-to- Point (not switch), FW Ready state can take a while.
FW will transition to ready state after all Nports have been
logged in. In the mean time, certain initiators have completed
the login and starts IO. Driver needs to start processing all
queues if FW is already started.

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
7 years agoqla2xxx: Change scsi host lookup method.
Quinn Tran [Wed, 15 Mar 2017 16:48:54 +0000 (09:48 -0700)]
qla2xxx: Change scsi host lookup method.

For target mode, when new scsi command arrive, driver first performs
a look up of the SCSI Host. The current look up method is based on
the ALPA portion of the NPort ID. For Cisco switch, the ALPA can
not be used as the index. Instead, the new search method is based
on the full value of the Nport_ID via btree lib.

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
7 years agoqla2xxx: Add DebugFS node to display Port Database
Himanshu Madhani [Wed, 15 Mar 2017 16:48:53 +0000 (09:48 -0700)]
qla2xxx: Add DebugFS node to display Port Database

Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@cavium.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
7 years agoqla2xxx: Use IOCB interface to submit non-critical MBX.
Quinn Tran [Wed, 15 Mar 2017 16:48:52 +0000 (09:48 -0700)]
qla2xxx: Use IOCB interface to submit non-critical MBX.

The Mailbox interface is currently over subscribed. We like
to reserve the Mailbox interface for the chip managment and
link initialization. Any non essential Mailbox command will
be routed through the IOCB interface. The IOCB interface is
able to absorb more commands.

Following commands are being routed through IOCB interface

- Get ID List (007Ch)
- Get Port DB (0064h)
- Get Link Priv Stats (006Dh)

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
7 years agoqla2xxx: Add async new target notification
Quinn Tran [Wed, 15 Mar 2017 16:48:51 +0000 (09:48 -0700)]
qla2xxx: Add async new target notification

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
7 years agoqla2xxx: Export DIF stats via debugfs
Anil Gurumurthy [Wed, 15 Mar 2017 16:48:50 +0000 (09:48 -0700)]
qla2xxx: Export DIF stats via debugfs

Signed-off-by: Anil Gurumurthy <anil.gurumurthy@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
7 years agoqla2xxx: Improve T10-DIF/PI handling in driver.
Quinn Tran [Wed, 15 Mar 2017 16:48:49 +0000 (09:48 -0700)]
qla2xxx: Improve T10-DIF/PI handling in driver.

Add routines to support T10 DIF tag.

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Anil Gurumurthy <anil.gurumurthy@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
7 years agoqla2xxx: Allow relogin to proceed if remote login did not finish
Quinn Tran [Wed, 15 Mar 2017 16:48:48 +0000 (09:48 -0700)]
qla2xxx: Allow relogin to proceed if remote login did not finish

If the remote port have started the login process, then the
PLOGI and PRLI should be back to back. Driver will allow
the remote port to complete the process. For the case where
the remote port decide to back off from sending PRLI, this
local port sets an expiration timer for the PRLI. Once the
expiration time passes, the relogin retry logic is allowed
to go through and perform login with the remote port.

Signed-off-by: Quinn Tran <quinn.tran@qlogic.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
7 years agoqla2xxx: Fix sess_lock & hardware_lock lock order problem.
Quinn Tran [Wed, 15 Mar 2017 16:48:47 +0000 (09:48 -0700)]
qla2xxx: Fix sess_lock & hardware_lock lock order problem.

The main lock that needs to be held for CMD or TMR submission
to upper layer is the sess_lock. The sess_lock is used to
serialize cmd submission and session deletion. The addition
of hardware_lock being held is not necessary. This patch removes
hardware_lock dependency from CMD/TMR submission.

Use hardware_lock only for error response in this case.

Path1
       CPU0                    CPU1
       ----                    ----
  lock(&(&ha->tgt.sess_lock)->rlock);
                               lock(&(&ha->hardware_lock)->rlock);
                               lock(&(&ha->tgt.sess_lock)->rlock);
  lock(&(&ha->hardware_lock)->rlock);

Path2/deadlock
*** DEADLOCK ***
Call Trace:
dump_stack+0x85/0xc2
print_circular_bug+0x1e3/0x250
__lock_acquire+0x1425/0x1620
lock_acquire+0xbf/0x210
_raw_spin_lock_irqsave+0x53/0x70
qlt_sess_work_fn+0x21d/0x480 [qla2xxx]
process_one_work+0x1f4/0x6e0

Cc: <stable@vger.kernel.org>
Cc: Bart Van Assche <Bart.VanAssche@sandisk.com>
Reported-by: Bart Van Assche <Bart.VanAssche@sandisk.com>
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
7 years agoqla2xxx: Fix inadequate lock protection for ABTS.
Quinn Tran [Wed, 15 Mar 2017 16:48:46 +0000 (09:48 -0700)]
qla2xxx: Fix inadequate lock protection for ABTS.

Normally, ABTS is sent to Target Core as Task MGMT command.
In the case of error, qla2xxx needs to send response, hardware_lock
is required to prevent request queue corruption.

Cc: <stable@vger.kernel.org>
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
7 years agoqla2xxx: Fix request queue corruption.
Quinn Tran [Wed, 15 Mar 2017 16:48:45 +0000 (09:48 -0700)]
qla2xxx: Fix request queue corruption.

When FW notify driver or driver detects low FW resource,
driver tries to send out Busy SCSI Status to tell Initiator
side to back off. During the send process, the lock was not held.

Cc: <stable@vger.kernel.org>
Signed-off-by: Quinn Tran <quinn.tran@qlogic.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
7 years agoqla2xxx: Fix memory leak for abts processing
Quinn Tran [Wed, 15 Mar 2017 16:48:44 +0000 (09:48 -0700)]
qla2xxx: Fix memory leak for abts processing

Cc: <stable@vger.kernel.org>
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
7 years agoqla2xxx: Allow vref count to timeout on vport delete.
Joe Carnuccio [Wed, 15 Mar 2017 16:48:43 +0000 (09:48 -0700)]
qla2xxx: Allow vref count to timeout on vport delete.

Cc: <stable@vger.kernel.org>
Signed-off-by: Joe Carnuccio <joe.carnuccio@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
7 years agotcmu: Convert cmd_time_out into backend device attribute
Nicholas Bellinger [Sat, 18 Mar 2017 22:04:13 +0000 (15:04 -0700)]
tcmu: Convert cmd_time_out into backend device attribute

Instead of putting cmd_time_out under ../target/core/user_0/foo/control,
which has historically been used by parameters needed for initial
backend device configuration, go ahead and move cmd_time_out into
a backend device attribute.

In order to do this, tcmu_module_init() has been updated to create
a local struct configfs_attribute **tcmu_attrs, that is based upon
the existing passthrough_attrib_attrs along with the new cmd_time_out
attribute.  Once **tcm_attrs has been setup, go ahead and point
it at tcmu_ops->tb_dev_attrib_attrs so it's picked up by target-core.

Also following MNC's previous change, ->cmd_time_out is stored in
milliseconds but exposed via configfs in seconds.  Also, note this
patch restricts the modification of ->cmd_time_out to before +
after the TCMU device has been configured, but not while it has
active fabric exports.

Cc: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
7 years agotcmu: make cmd timeout configurable
Mike Christie [Thu, 9 Mar 2017 08:42:09 +0000 (02:42 -0600)]
tcmu: make cmd timeout configurable

A single daemon could implement multiple types of devices
using multuple types of real devices that may not support
restarting from crashes and/or handling tcmu timeouts. This
makes the cmd timeout configurable, so handlers that do not
support it can turn if off for now.

Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
7 years agotcmu: add helper to check if dev was configured
Mike Christie [Thu, 9 Mar 2017 08:42:08 +0000 (02:42 -0600)]
tcmu: add helper to check if dev was configured

This adds a helper to check if the dev was configured. It
will be used in the next patch to prevent updates to some
config settings after the device has been setup.

Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
7 years agoMerge tag 'openrisc-for-linus' of git://github.com/openrisc/linux
Linus Torvalds [Sat, 18 Mar 2017 22:50:39 +0000 (15:50 -0700)]
Merge tag 'openrisc-for-linus' of git://github.com/openrisc/linux

Pull OpenRISC fixes from Stafford Horne:
 "OpenRISC fixes for build issues that were exposed by kbuild robots
  after 4.11 merge. All from allmodconfig builds. This includes:

   - bug in the handling of 8-byte get_user() calls

   - module build failure due to multile missing symbol exports"

* tag 'openrisc-for-linus' of git://github.com/openrisc/linux:
  openrisc: Export symbols needed by modules
  openrisc: fix issue handling 8 byte get_user calls
  openrisc: xchg: fix `computed is not used` warning

7 years agotarget: fix race during implicit transition work flushes
Mike Christie [Thu, 2 Mar 2017 10:59:50 +0000 (04:59 -0600)]
target: fix race during implicit transition work flushes

This fixes the following races:

1. core_alua_do_transition_tg_pt could have read
tg_pt_gp_alua_access_state and gone into this if chunk:

if (!explicit &&
        atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state) ==
           ALUA_ACCESS_STATE_TRANSITION) {

and then core_alua_do_transition_tg_pt_work could update the
state. core_alua_do_transition_tg_pt would then only set
tg_pt_gp_alua_pending_state and the tg_pt_gp_alua_access_state would
not get updated with the second calls state.

2. core_alua_do_transition_tg_pt could be setting
tg_pt_gp_transition_complete while the tg_pt_gp_transition_work
is already completing. core_alua_do_transition_tg_pt then waits on the
completion that will never be called.

To handle these issues, we just call flush_work which will return when
core_alua_do_transition_tg_pt_work has completed so there is no need
to do the complete/wait. And, if core_alua_do_transition_tg_pt_work
was running, instead of trying to sneak in the state change, we just
schedule up another core_alua_do_transition_tg_pt_work call.

Note that this does not handle a possible race where there are multiple
threads call core_alua_do_transition_tg_pt at the same time. I think
we need a mutex in target_tg_pt_gp_alua_access_state_store.

Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
7 years agotarget: allow userspace to set state to transitioning
Mike Christie [Thu, 2 Mar 2017 10:59:49 +0000 (04:59 -0600)]
target: allow userspace to set state to transitioning

Userspace target_core_user handlers like tcmu-runner may want to set the
ALUA state to transitioning while it does implicit transitions. This
patch allows that state when set from configfs.

Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>