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a073aeb060
For small objects the Linux slab allocator has several advantages
over its counterpart in the SPL. These include:
1) It is more memory-efficient and packs objects more tightly.
2) It is continually tuned to maximize performance.
Therefore it makes sense to layer the SPLs slab allocator on top
of the Linux slab allocator. This allows us to leverage the
advantages above while preserving the Illumos semantics we depend
on. However, there are some things we need to be careful of:
1) The Linux slab allocator was never designed to work well with
large objects. Because the SPL slab must still handle this use
case a cut off limit was added to transition from Linux slab
backed objects to kmem or vmem backed slabs.
spl_kmem_cache_slab_limit - Objects less than or equal to this
size in bytes will be backed by the Linux slab. By default
this value is zero which disables the Linux slab functionality.
Reasonable values for this cut off limit are in the range of
4096-16386 bytes.
spl_kmem_cache_kmem_limit - Objects less than or equal to this
size in bytes will be backed by a kmem slab. Objects over this
size will be vmem backed instead. This value defaults to
1/8 a page, or 512 bytes on an x86_64 architecture.
2) Be aware that using the Linux slab may inadvertently introduce
new deadlocks. Care has been taken previously to ensure that
all allocations which occur in the write path use GFP_NOIO.
However, there may be internal allocations performed in the
Linux slab which do not honor these flags. If this is the case
a deadlock may occur.
The path forward is definitely to start relying on the Linux slab.
But for that to happen we need to start building confidence that
there aren't any unexpected surprises lurking for us. And ideally
need to move completely away from using the SPLs slab for large
memory allocations. This patch is a first step.
NOTES:
1) The KMC_NOMAGAZINE flag was leveraged to support the Linux slab
backed caches but it is not supported for kmem/vmem backed caches.
2) Regardless of the spl_kmem_cache_*_limit settings a cache may
be explicitly set to a given type by passed the KMC_KMEM,
KMC_VMEM, or KMC_SLAB flags during cache creation.
3) The constructors, destructors, and reclaim callbacks are all
functional and will be called regardless of the cache type.
4) KMC_SLAB caches will not appear in /proc/spl/kmem/slab due to
the issues involved in presenting correct object accounting.
Instead they will appear in /proc/slabinfo under the same names.
5) Several kmem SPLAT tests needed to be fixed because they relied
incorrectly on internal kmem slab accounting. With the updated
test cases all the SPLAT tests pass as expected.
6) An autoconf test was added to ensure that the __GFP_COMP flag
was correctly added to the default flags used when allocating
a slab. This is required to ensure all pages in higher order
slabs are properly refcounted, see ae16ed9.
7) When using the SLUB allocator there is no need to attempt to
set the __GFP_COMP flag. This has been the default behavior
for the SLUB since Linux 2.6.25.
8) When using the SLUB it may be desirable to set the slub_nomerge
kernel parameter to prevent caches from being merged.
Original-patch-by: DHE <git@dehacked.net>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Prakash Surya <surya1@llnl.gov>
Signed-off-by: Tim Chase <tim@chase2k.com>
Signed-off-by: DHE <git@dehacked.net>
Signed-off-by: Chunwei Chen <tuxoko@gmail.com>
Closes #356
2573 lines
66 KiB
Plaintext
2573 lines
66 KiB
Plaintext
###############################################################################
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# Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
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# Copyright (C) 2007 The Regents of the University of California.
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# Written by Brian Behlendorf <behlendorf1@llnl.gov>.
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###############################################################################
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# SPL_AC_CONFIG_KERNEL: Default SPL kernel configuration.
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###############################################################################
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AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
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SPL_AC_KERNEL
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if test "${LINUX_OBJ}" != "${LINUX}"; then
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KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
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fi
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AC_SUBST(KERNELMAKE_PARAMS)
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KERNELCPPFLAGS="$KERNELCPPFLAGS -Wstrict-prototypes"
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AC_SUBST(KERNELCPPFLAGS)
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SPL_AC_DEBUG
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SPL_AC_DEBUG_LOG
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SPL_AC_DEBUG_KMEM
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SPL_AC_DEBUG_KMEM_TRACKING
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SPL_AC_TEST_MODULE
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SPL_AC_ATOMIC_SPINLOCK
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SPL_AC_TYPE_ATOMIC64_CMPXCHG
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SPL_AC_TYPE_ATOMIC64_XCHG
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SPL_AC_TYPE_UINTPTR_T
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SPL_AC_2ARGS_REGISTER_SYSCTL
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SPL_AC_SHRINKER_CALLBACK
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SPL_AC_PATH_IN_NAMEIDATA
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SPL_AC_TASK_CURR
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SPL_AC_CTL_UNNUMBERED
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SPL_AC_CTL_NAME
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SPL_AC_VMALLOC_INFO
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SPL_AC_PDE_DATA
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SPL_AC_FLS64
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SPL_AC_DEVICE_CREATE
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SPL_AC_5ARGS_DEVICE_CREATE
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SPL_AC_CLASS_DEVICE_CREATE
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SPL_AC_SET_NORMALIZED_TIMESPEC_EXPORT
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SPL_AC_SET_NORMALIZED_TIMESPEC_INLINE
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SPL_AC_TIMESPEC_SUB
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SPL_AC_INIT_UTSNAME
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SPL_AC_UACCESS_HEADER
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SPL_AC_KMALLOC_NODE
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SPL_AC_MONOTONIC_CLOCK
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SPL_AC_INODE_I_MUTEX
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SPL_AC_MUTEX_OWNER
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SPL_AC_MUTEX_OWNER_TASK_STRUCT
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SPL_AC_MUTEX_LOCK_NESTED
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SPL_AC_3ARGS_ON_EACH_CPU
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SPL_AC_KALLSYMS_LOOKUP_NAME
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SPL_AC_GET_VMALLOC_INFO
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SPL_AC_PGDAT_HELPERS
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SPL_AC_FIRST_ONLINE_PGDAT
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SPL_AC_NEXT_ONLINE_PGDAT
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SPL_AC_NEXT_ZONE
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SPL_AC_PGDAT_LIST
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SPL_AC_GLOBAL_PAGE_STATE
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SPL_AC_ZONE_STAT_ITEM_FREE
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SPL_AC_ZONE_STAT_ITEM_INACTIVE
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SPL_AC_ZONE_STAT_ITEM_ACTIVE
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SPL_AC_GET_ZONE_COUNTS
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SPL_AC_USER_PATH_DIR
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SPL_AC_SET_FS_PWD
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SPL_AC_SET_FS_PWD_WITH_CONST
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SPL_AC_2ARGS_VFS_UNLINK
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SPL_AC_4ARGS_VFS_RENAME
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SPL_AC_VFS_FSYNC
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SPL_AC_2ARGS_VFS_FSYNC
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SPL_AC_INODE_TRUNCATE_RANGE
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SPL_AC_FS_STRUCT_SPINLOCK
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SPL_AC_CRED_STRUCT
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SPL_AC_KUIDGID_T
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SPL_AC_GROUPS_SEARCH
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SPL_AC_PUT_TASK_STRUCT
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SPL_AC_5ARGS_PROC_HANDLER
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SPL_AC_KVASPRINTF
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SPL_AC_EXPORTED_RWSEM_IS_LOCKED
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SPL_AC_KERNEL_FALLOCATE
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SPL_AC_SHRINK_DCACHE_MEMORY
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SPL_AC_SHRINK_ICACHE_MEMORY
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SPL_AC_KERN_PATH_PARENT_HEADER
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SPL_AC_KERN_PATH_PARENT_SYMBOL
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SPL_AC_KERN_PATH_LOCKED
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SPL_AC_CONFIG_KALLSYMS
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SPL_AC_CONFIG_ZLIB_INFLATE
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SPL_AC_CONFIG_ZLIB_DEFLATE
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SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE
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SPL_AC_SHRINK_CONTROL_STRUCT
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SPL_AC_RWSEM_SPINLOCK_IS_RAW
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SPL_AC_SCHED_RT_HEADER
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SPL_AC_2ARGS_VFS_GETATTR
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SPL_AC_USLEEP_RANGE
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SPL_AC_KMEM_CACHE_ALLOCFLAGS
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])
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AC_DEFUN([SPL_AC_MODULE_SYMVERS], [
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modpost=$LINUX/scripts/Makefile.modpost
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AC_MSG_CHECKING([kernel file name for module symbols])
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if test "x$enable_linux_builtin" != xyes -a -f "$modpost"; then
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if grep -q Modules.symvers $modpost; then
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LINUX_SYMBOLS=Modules.symvers
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else
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LINUX_SYMBOLS=Module.symvers
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fi
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if ! test -f "$LINUX_OBJ/$LINUX_SYMBOLS"; then
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AC_MSG_ERROR([
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*** Please make sure the kernel devel package for your distribution
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*** is installed. If you are building with a custom kernel, make sure the
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*** kernel is configured, built, and the '--with-linux=PATH' configure
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*** option refers to the location of the kernel source.])
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fi
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else
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LINUX_SYMBOLS=NONE
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fi
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AC_MSG_RESULT($LINUX_SYMBOLS)
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AC_SUBST(LINUX_SYMBOLS)
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])
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AC_DEFUN([SPL_AC_KERNEL], [
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AC_ARG_WITH([linux],
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AS_HELP_STRING([--with-linux=PATH],
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[Path to kernel source]),
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[kernelsrc="$withval"])
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AC_ARG_WITH([linux-obj],
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AS_HELP_STRING([--with-linux-obj=PATH],
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[Path to kernel build objects]),
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[kernelbuild="$withval"])
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AC_MSG_CHECKING([kernel source directory])
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if test -z "$kernelsrc"; then
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if test -e "/lib/modules/$(uname -r)/source"; then
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headersdir="/lib/modules/$(uname -r)/source"
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sourcelink=$(readlink -f "$headersdir")
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elif test -e "/lib/modules/$(uname -r)/build"; then
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headersdir="/lib/modules/$(uname -r)/build"
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sourcelink=$(readlink -f "$headersdir")
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else
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sourcelink=$(ls -1d /usr/src/kernels/* \
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/usr/src/linux-* \
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2>/dev/null | grep -v obj | tail -1)
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fi
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if test -n "$sourcelink" && test -e ${sourcelink}; then
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kernelsrc=`readlink -f ${sourcelink}`
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else
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kernelsrc="[Not found]"
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fi
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else
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if test "$kernelsrc" = "NONE"; then
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kernsrcver=NONE
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fi
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fi
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AC_MSG_RESULT([$kernelsrc])
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if test ! -d "$kernelsrc"; then
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AC_MSG_ERROR([
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*** Please make sure the kernel devel package for your distribution
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*** is installed and then try again. If that fails, you can specify the
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*** location of the kernel source with the '--with-linux=PATH' option.])
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fi
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AC_MSG_CHECKING([kernel build directory])
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if test -z "$kernelbuild"; then
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if test -e "/lib/modules/$(uname -r)/build"; then
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kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
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elif test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}; then
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kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
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elif test -d ${kernelsrc}-obj/${target_cpu}/default; then
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kernelbuild=${kernelsrc}-obj/${target_cpu}/default
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elif test -d `dirname ${kernelsrc}`/build-${target_cpu}; then
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kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
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else
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kernelbuild=${kernelsrc}
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fi
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fi
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AC_MSG_RESULT([$kernelbuild])
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AC_MSG_CHECKING([kernel source version])
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utsrelease1=$kernelbuild/include/linux/version.h
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utsrelease2=$kernelbuild/include/linux/utsrelease.h
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utsrelease3=$kernelbuild/include/generated/utsrelease.h
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if test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1; then
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utsrelease=linux/version.h
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elif test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2; then
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utsrelease=linux/utsrelease.h
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elif test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3; then
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utsrelease=generated/utsrelease.h
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fi
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if test "$utsrelease"; then
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kernsrcver=`(echo "#include <$utsrelease>";
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echo "kernsrcver=UTS_RELEASE") |
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cpp -I $kernelbuild/include |
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grep "^kernsrcver=" | cut -d \" -f 2`
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if test -z "$kernsrcver"; then
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AC_MSG_RESULT([Not found])
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AC_MSG_ERROR([*** Cannot determine kernel version.])
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fi
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else
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AC_MSG_RESULT([Not found])
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if test "x$enable_linux_builtin" != xyes; then
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AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
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else
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AC_MSG_ERROR([
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*** Cannot find UTS_RELEASE definition.
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*** Please run 'make prepare' inside the kernel source tree.])
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fi
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fi
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AC_MSG_RESULT([$kernsrcver])
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LINUX=${kernelsrc}
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LINUX_OBJ=${kernelbuild}
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LINUX_VERSION=${kernsrcver}
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AC_SUBST(LINUX)
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AC_SUBST(LINUX_OBJ)
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AC_SUBST(LINUX_VERSION)
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SPL_AC_MODULE_SYMVERS
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])
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dnl #
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dnl # Default SPL user configuration
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dnl #
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AC_DEFUN([SPL_AC_CONFIG_USER], [])
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dnl #
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dnl # Check for rpm+rpmbuild to build RPM packages. If these tools
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dnl # are missing, it is non-fatal, but you will not be able to build
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dnl # RPM packages and will be warned if you try too.
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dnl #
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dnl # By default, the generic spec file will be used because it requires
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dnl # minimal dependencies. Distribution specific spec files can be
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dnl # placed under the 'rpm/<distribution>' directory and enabled using
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dnl # the --with-spec=<distribution> configure option.
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dnl #
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AC_DEFUN([SPL_AC_RPM], [
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RPM=rpm
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RPMBUILD=rpmbuild
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AC_MSG_CHECKING([whether $RPM is available])
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AS_IF([tmp=$($RPM --version 2>/dev/null)], [
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RPM_VERSION=$(echo $tmp | $AWK '/RPM/ { print $[3] }')
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HAVE_RPM=yes
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AC_MSG_RESULT([$HAVE_RPM ($RPM_VERSION)])
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],[
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HAVE_RPM=no
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AC_MSG_RESULT([$HAVE_RPM])
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])
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AC_MSG_CHECKING([whether $RPMBUILD is available])
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AS_IF([tmp=$($RPMBUILD --version 2>/dev/null)], [
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RPMBUILD_VERSION=$(echo $tmp | $AWK '/RPM/ { print $[3] }')
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HAVE_RPMBUILD=yes
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AC_MSG_RESULT([$HAVE_RPMBUILD ($RPMBUILD_VERSION)])
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],[
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HAVE_RPMBUILD=no
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AC_MSG_RESULT([$HAVE_RPMBUILD])
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])
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RPM_DEFINE_COMMON='--define "$(DEBUG_SPL) 1" --define "$(DEBUG_LOG) 1" --define "$(DEBUG_KMEM) 1" --define "$(DEBUG_KMEM_TRACKING) 1"'
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RPM_DEFINE_UTIL=
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RPM_DEFINE_KMOD='--define "kernels $(LINUX_VERSION)"'
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RPM_DEFINE_DKMS=
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SRPM_DEFINE_COMMON='--define "build_src_rpm 1"'
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SRPM_DEFINE_UTIL=
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SRPM_DEFINE_KMOD=
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SRPM_DEFINE_DKMS=
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RPM_SPEC_DIR="rpm/generic"
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AC_ARG_WITH([spec],
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AS_HELP_STRING([--with-spec=SPEC],
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[Spec files 'generic|fedora']),
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[RPM_SPEC_DIR="rpm/$withval"])
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AC_MSG_CHECKING([whether spec files are available])
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AC_MSG_RESULT([yes ($RPM_SPEC_DIR/*.spec.in)])
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AC_SUBST(HAVE_RPM)
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AC_SUBST(RPM)
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AC_SUBST(RPM_VERSION)
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AC_SUBST(HAVE_RPMBUILD)
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AC_SUBST(RPMBUILD)
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AC_SUBST(RPMBUILD_VERSION)
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AC_SUBST(RPM_SPEC_DIR)
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AC_SUBST(RPM_DEFINE_UTIL)
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AC_SUBST(RPM_DEFINE_KMOD)
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AC_SUBST(RPM_DEFINE_DKMS)
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AC_SUBST(RPM_DEFINE_COMMON)
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AC_SUBST(SRPM_DEFINE_UTIL)
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AC_SUBST(SRPM_DEFINE_KMOD)
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AC_SUBST(SRPM_DEFINE_DKMS)
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AC_SUBST(SRPM_DEFINE_COMMON)
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])
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dnl #
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dnl # Check for dpkg+dpkg-buildpackage to build DEB packages. If these
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dnl # tools are missing it is non-fatal but you will not be able to build
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dnl # DEB packages and will be warned if you try too.
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dnl #
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AC_DEFUN([SPL_AC_DPKG], [
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DPKG=dpkg
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DPKGBUILD=dpkg-buildpackage
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AC_MSG_CHECKING([whether $DPKG is available])
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AS_IF([tmp=$($DPKG --version 2>/dev/null)], [
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DPKG_VERSION=$(echo $tmp | $AWK '/Debian/ { print $[7] }')
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HAVE_DPKG=yes
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AC_MSG_RESULT([$HAVE_DPKG ($DPKG_VERSION)])
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],[
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HAVE_DPKG=no
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AC_MSG_RESULT([$HAVE_DPKG])
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])
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AC_MSG_CHECKING([whether $DPKGBUILD is available])
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AS_IF([tmp=$($DPKGBUILD --version 2>/dev/null)], [
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DPKGBUILD_VERSION=$(echo $tmp | \
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$AWK '/Debian/ { print $[4] }' | cut -f-4 -d'.')
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HAVE_DPKGBUILD=yes
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AC_MSG_RESULT([$HAVE_DPKGBUILD ($DPKGBUILD_VERSION)])
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],[
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HAVE_DPKGBUILD=no
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AC_MSG_RESULT([$HAVE_DPKGBUILD])
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])
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AC_SUBST(HAVE_DPKG)
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AC_SUBST(DPKG)
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AC_SUBST(DPKG_VERSION)
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AC_SUBST(HAVE_DPKGBUILD)
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AC_SUBST(DPKGBUILD)
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AC_SUBST(DPKGBUILD_VERSION)
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])
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dnl #
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dnl # Until native packaging for various different packing systems
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dnl # can be added the least we can do is attempt to use alien to
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dnl # convert the RPM packages to the needed package type. This is
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dnl # a hack but so far it has worked reasonable well.
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dnl #
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AC_DEFUN([SPL_AC_ALIEN], [
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ALIEN=alien
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AC_MSG_CHECKING([whether $ALIEN is available])
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AS_IF([tmp=$($ALIEN --version 2>/dev/null)], [
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ALIEN_VERSION=$(echo $tmp | $AWK '{ print $[3] }')
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HAVE_ALIEN=yes
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AC_MSG_RESULT([$HAVE_ALIEN ($ALIEN_VERSION)])
|
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],[
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HAVE_ALIEN=no
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AC_MSG_RESULT([$HAVE_ALIEN])
|
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])
|
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|
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AC_SUBST(HAVE_ALIEN)
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AC_SUBST(ALIEN)
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AC_SUBST(ALIEN_VERSION)
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])
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dnl #
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dnl # Using the VENDOR tag from config.guess set the default
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dnl # package type for 'make pkg': (rpm | deb | tgz)
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dnl #
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AC_DEFUN([SPL_AC_DEFAULT_PACKAGE], [
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AC_MSG_CHECKING([linux distribution])
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if test -f /etc/toss-release ; then
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VENDOR=toss ;
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elif test -f /etc/fedora-release ; then
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|
VENDOR=fedora ;
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|
elif test -f /etc/redhat-release ; then
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|
VENDOR=redhat ;
|
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elif test -f /etc/gentoo-release ; then
|
|
VENDOR=gentoo ;
|
|
elif test -f /etc/arch-release ; then
|
|
VENDOR=arch ;
|
|
elif test -f /etc/SuSE-release ; then
|
|
VENDOR=sles ;
|
|
elif test -f /etc/slackware-version ; then
|
|
VENDOR=slackware ;
|
|
elif test -f /etc/lunar.release ; then
|
|
VENDOR=lunar ;
|
|
elif test -f /etc/lsb-release ; then
|
|
VENDOR=ubuntu ;
|
|
elif test -f /etc/debian_version ; then
|
|
VENDOR=debian ;
|
|
else
|
|
VENDOR= ;
|
|
fi
|
|
AC_MSG_RESULT([$VENDOR])
|
|
AC_SUBST(VENDOR)
|
|
|
|
AC_MSG_CHECKING([default package type])
|
|
case "$VENDOR" in
|
|
toss) DEFAULT_PACKAGE=rpm ;;
|
|
redhat) DEFAULT_PACKAGE=rpm ;;
|
|
fedora) DEFAULT_PACKAGE=rpm ;;
|
|
gentoo) DEFAULT_PACKAGE=tgz ;;
|
|
arch) DEFAULT_PACKAGE=tgz ;;
|
|
sles) DEFAULT_PACKAGE=rpm ;;
|
|
slackware) DEFAULT_PACKAGE=tgz ;;
|
|
lunar) DEFAULT_PACKAGE=tgz ;;
|
|
ubuntu) DEFAULT_PACKAGE=deb ;;
|
|
debian) DEFAULT_PACKAGE=deb ;;
|
|
*) DEFAULT_PACKAGE=rpm ;;
|
|
esac
|
|
|
|
AC_MSG_RESULT([$DEFAULT_PACKAGE])
|
|
AC_SUBST(DEFAULT_PACKAGE)
|
|
])
|
|
|
|
dnl #
|
|
dnl # Default SPL user configuration
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_PACKAGE], [
|
|
SPL_AC_DEFAULT_PACKAGE
|
|
SPL_AC_RPM
|
|
SPL_AC_DPKG
|
|
SPL_AC_ALIEN
|
|
])
|
|
|
|
AC_DEFUN([SPL_AC_LICENSE], [
|
|
AC_MSG_CHECKING([spl license])
|
|
LICENSE=GPL
|
|
AC_MSG_RESULT([$LICENSE])
|
|
KERNELCPPFLAGS="${KERNELCPPFLAGS} -DHAVE_GPL_ONLY_SYMBOLS"
|
|
AC_SUBST(LICENSE)
|
|
])
|
|
|
|
AC_DEFUN([SPL_AC_CONFIG], [
|
|
SPL_CONFIG=all
|
|
AC_ARG_WITH([config],
|
|
AS_HELP_STRING([--with-config=CONFIG],
|
|
[Config file 'kernel|user|all|srpm']),
|
|
[SPL_CONFIG="$withval"])
|
|
AC_ARG_ENABLE([linux-builtin],
|
|
[AC_HELP_STRING([--enable-linux-builtin],
|
|
[Configure for builtin in-tree kernel modules @<:@default=no@:>@])],
|
|
[],
|
|
[enable_linux_builtin=no])
|
|
|
|
AC_MSG_CHECKING([spl config])
|
|
AC_MSG_RESULT([$SPL_CONFIG]);
|
|
AC_SUBST(SPL_CONFIG)
|
|
|
|
case "$SPL_CONFIG" in
|
|
kernel) SPL_AC_CONFIG_KERNEL ;;
|
|
user) SPL_AC_CONFIG_USER ;;
|
|
all) SPL_AC_CONFIG_KERNEL
|
|
SPL_AC_CONFIG_USER ;;
|
|
srpm) ;;
|
|
*)
|
|
AC_MSG_RESULT([Error!])
|
|
AC_MSG_ERROR([Bad value "$SPL_CONFIG" for --with-config,
|
|
user kernel|user|all|srpm]) ;;
|
|
esac
|
|
|
|
AM_CONDITIONAL([CONFIG_USER],
|
|
[test "$SPL_CONFIG" = user -o "$SPL_CONFIG" = all])
|
|
AM_CONDITIONAL([CONFIG_KERNEL],
|
|
[test "$SPL_CONFIG" = kernel -o "$SPL_CONFIG" = all] &&
|
|
[test "x$enable_linux_builtin" != xyes ])
|
|
])
|
|
|
|
dnl #
|
|
dnl # Enable if the SPL should be compiled with internal debugging enabled.
|
|
dnl # By default this support is disabled.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_DEBUG], [
|
|
AC_MSG_CHECKING([whether debugging is enabled])
|
|
AC_ARG_ENABLE([debug],
|
|
[AS_HELP_STRING([--enable-debug],
|
|
[Enable generic debug support @<:@default=no@:>@])],
|
|
[],
|
|
[enable_debug=no])
|
|
|
|
AS_IF([test "x$enable_debug" = xyes],
|
|
[
|
|
KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG -Werror"
|
|
DEBUG_CFLAGS="-DDEBUG -Werror"
|
|
DEBUG_SPL="_with_debug"
|
|
], [
|
|
KERNELCPPFLAGS="${KERNELCPPFLAGS} -DNDEBUG"
|
|
DEBUG_CFLAGS="-DNDEBUG"
|
|
DEBUG_SPL="_without_debug"
|
|
])
|
|
|
|
AC_SUBST(DEBUG_CFLAGS)
|
|
AC_SUBST(DEBUG_SPL)
|
|
AC_MSG_RESULT([$enable_debug])
|
|
])
|
|
|
|
dnl #
|
|
dnl # Enabled by default it provides a basic debug log infrastructure.
|
|
dnl # Each subsystem registers itself with a name and logs messages
|
|
dnl # using predefined types. If the debug mask it set to allow the
|
|
dnl # message type it will be written to the internal log. The log
|
|
dnl # can be dumped to a file by echoing 1 to the 'dump' proc entry,
|
|
dnl # after dumping the log it must be decoded using the spl utility.
|
|
dnl #
|
|
dnl # echo 1 >/proc/sys/kernel/spl/debug/dump
|
|
dnl # spl /tmp/spl-log.xxx.yyy /tmp/spl-log.xxx.yyy.txt
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_DEBUG_LOG], [
|
|
AC_ARG_ENABLE([debug-log],
|
|
[AS_HELP_STRING([--enable-debug-log],
|
|
[Enable basic debug logging @<:@default=yes@:>@])],
|
|
[],
|
|
[enable_debug_log=yes])
|
|
|
|
AS_IF([test "x$enable_debug_log" = xyes],
|
|
[
|
|
KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_LOG"
|
|
DEBUG_LOG="_with_debug_log"
|
|
AC_DEFINE([DEBUG_LOG], [1],
|
|
[Define to 1 to enable basic debug logging])
|
|
], [
|
|
DEBUG_LOG="_without_debug_log"
|
|
])
|
|
|
|
AC_SUBST(DEBUG_LOG)
|
|
AC_MSG_CHECKING([whether basic debug logging is enabled])
|
|
AC_MSG_RESULT([$enable_debug_log])
|
|
])
|
|
|
|
dnl #
|
|
dnl # Enabled by default it provides a minimal level of memory tracking.
|
|
dnl # A total count of bytes allocated is kept for each alloc and free.
|
|
dnl # Then at module unload time a report to the console will be printed
|
|
dnl # if memory was leaked. Additionally, /proc/spl/kmem/slab will exist
|
|
dnl # and provide an easy way to inspect the kmem based slab.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_DEBUG_KMEM], [
|
|
AC_ARG_ENABLE([debug-kmem],
|
|
[AS_HELP_STRING([--enable-debug-kmem],
|
|
[Enable basic kmem accounting @<:@default=yes@:>@])],
|
|
[],
|
|
[enable_debug_kmem=yes])
|
|
|
|
AS_IF([test "x$enable_debug_kmem" = xyes],
|
|
[
|
|
KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM"
|
|
DEBUG_KMEM="_with_debug_kmem"
|
|
AC_DEFINE([DEBUG_KMEM], [1],
|
|
[Define to 1 to enable basic kmem accounting])
|
|
], [
|
|
DEBUG_KMEM="_without_debug_kmem"
|
|
])
|
|
|
|
AC_SUBST(DEBUG_KMEM)
|
|
AC_MSG_CHECKING([whether basic kmem accounting is enabled])
|
|
AC_MSG_RESULT([$enable_debug_kmem])
|
|
])
|
|
|
|
dnl #
|
|
dnl # Disabled by default it provides detailed memory tracking. This
|
|
dnl # feature also requires --enable-debug-kmem to be set. When enabled
|
|
dnl # not only will total bytes be tracked but also the location of every
|
|
dnl # alloc and free. When the SPL module is unloaded a list of all leaked
|
|
dnl # addresses and where they were allocated will be dumped to the console.
|
|
dnl # Enabling this feature has a significant impact on performance but it
|
|
dnl # makes finding memory leaks pretty straight forward.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_DEBUG_KMEM_TRACKING], [
|
|
AC_ARG_ENABLE([debug-kmem-tracking],
|
|
[AS_HELP_STRING([--enable-debug-kmem-tracking],
|
|
[Enable detailed kmem tracking @<:@default=no@:>@])],
|
|
[],
|
|
[enable_debug_kmem_tracking=no])
|
|
|
|
AS_IF([test "x$enable_debug_kmem_tracking" = xyes],
|
|
[
|
|
KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM_TRACKING"
|
|
DEBUG_KMEM_TRACKING="_with_debug_kmem_tracking"
|
|
AC_DEFINE([DEBUG_KMEM_TRACKING], [1],
|
|
[Define to 1 to enable detailed kmem tracking])
|
|
], [
|
|
DEBUG_KMEM_TRACKING="_without_debug_kmem_tracking"
|
|
])
|
|
|
|
AC_SUBST(DEBUG_KMEM_TRACKING)
|
|
AC_MSG_CHECKING([whether detailed kmem tracking is enabled])
|
|
AC_MSG_RESULT([$enable_debug_kmem_tracking])
|
|
])
|
|
|
|
dnl #
|
|
dnl # SPL_LINUX_CONFTEST
|
|
dnl #
|
|
AC_DEFUN([SPL_LINUX_CONFTEST], [
|
|
cat confdefs.h - <<_ACEOF >conftest.c
|
|
$1
|
|
_ACEOF
|
|
])
|
|
|
|
dnl #
|
|
dnl # SPL_LANG_PROGRAM(C)([PROLOGUE], [BODY])
|
|
dnl #
|
|
m4_define([SPL_LANG_PROGRAM], [
|
|
$1
|
|
int
|
|
main (void)
|
|
{
|
|
dnl Do *not* indent the following line: there may be CPP directives.
|
|
dnl Don't move the `;' right after for the same reason.
|
|
$2
|
|
;
|
|
return 0;
|
|
}
|
|
])
|
|
|
|
dnl #
|
|
dnl # SPL_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
|
|
dnl #
|
|
AC_DEFUN([SPL_LINUX_COMPILE_IFELSE], [
|
|
m4_ifvaln([$1], [SPL_LINUX_CONFTEST([$1])])
|
|
rm -Rf build && mkdir -p build && touch build/conftest.mod.c
|
|
echo "obj-m := conftest.o" >build/Makefile
|
|
modpost_flag=''
|
|
test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
|
|
AS_IF(
|
|
[AC_TRY_COMMAND(cp conftest.c build && make [$2] -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag) >/dev/null && AC_TRY_COMMAND([$3])],
|
|
[$4],
|
|
[_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
|
|
)
|
|
rm -Rf build
|
|
])
|
|
|
|
dnl #
|
|
dnl # SPL_LINUX_TRY_COMPILE like AC_TRY_COMPILE
|
|
dnl #
|
|
AC_DEFUN([SPL_LINUX_TRY_COMPILE],
|
|
[SPL_LINUX_COMPILE_IFELSE(
|
|
[AC_LANG_SOURCE([SPL_LANG_PROGRAM([[$1]], [[$2]])])],
|
|
[modules],
|
|
[test -s build/conftest.o],
|
|
[$3], [$4])
|
|
])
|
|
|
|
dnl #
|
|
dnl # SPL_CHECK_SYMBOL_EXPORT
|
|
dnl # check symbol exported or not
|
|
dnl #
|
|
AC_DEFUN([SPL_CHECK_SYMBOL_EXPORT], [
|
|
grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
|
|
$LINUX_OBJ/Module*.symvers 2>/dev/null
|
|
rc=$?
|
|
if test $rc -ne 0; then
|
|
export=0
|
|
for file in $2; do
|
|
grep -q -E "EXPORT_SYMBOL.*($1)" \
|
|
"$LINUX_OBJ/$file" 2>/dev/null
|
|
rc=$?
|
|
if test $rc -eq 0; then
|
|
export=1
|
|
break;
|
|
fi
|
|
done
|
|
if test $export -eq 0; then :
|
|
$4
|
|
else :
|
|
$3
|
|
fi
|
|
else :
|
|
$3
|
|
fi
|
|
])
|
|
|
|
dnl #
|
|
dnl # SPL_LINUX_TRY_COMPILE_SYMBOL
|
|
dnl # like SPL_LINUX_TRY_COMPILE, except SPL_CHECK_SYMBOL_EXPORT
|
|
dnl # is called if not compiling for builtin
|
|
dnl #
|
|
AC_DEFUN([SPL_LINUX_TRY_COMPILE_SYMBOL], [
|
|
SPL_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1])
|
|
if test $rc -ne 0; then :
|
|
$6
|
|
else
|
|
if test "x$enable_linux_builtin" != xyes; then
|
|
SPL_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1])
|
|
fi
|
|
if test $rc -ne 0; then :
|
|
$6
|
|
else :
|
|
$5
|
|
fi
|
|
fi
|
|
])
|
|
|
|
dnl #
|
|
dnl # SPL_CHECK_SYMBOL_HEADER
|
|
dnl # check if a symbol prototype is defined in listed headers.
|
|
dnl #
|
|
AC_DEFUN([SPL_CHECK_SYMBOL_HEADER], [
|
|
AC_MSG_CHECKING([whether symbol $1 exists in header])
|
|
header=0
|
|
for file in $3; do
|
|
grep -q "$2" "$LINUX/$file" 2>/dev/null
|
|
rc=$?
|
|
if test $rc -eq 0; then
|
|
header=1
|
|
break;
|
|
fi
|
|
done
|
|
if test $header -eq 0; then
|
|
AC_MSG_RESULT([no])
|
|
$5
|
|
else
|
|
AC_MSG_RESULT([yes])
|
|
$4
|
|
fi
|
|
])
|
|
|
|
dnl #
|
|
dnl # SPL_CHECK_HEADER
|
|
dnl # check whether header exists and define HAVE_$2_HEADER
|
|
dnl #
|
|
AC_DEFUN([SPL_CHECK_HEADER],
|
|
[AC_MSG_CHECKING([whether header $1 exists])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <$1>
|
|
],[
|
|
return 0;
|
|
],[
|
|
AC_DEFINE(HAVE_$2_HEADER, 1, [$1 exists])
|
|
AC_MSG_RESULT(yes)
|
|
$3
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
$4
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # Basic toolchain sanity check.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_TEST_MODULE],
|
|
[AC_MSG_CHECKING([whether modules can be built])
|
|
SPL_LINUX_TRY_COMPILE([],[],[
|
|
AC_MSG_RESULT([yes])
|
|
],[
|
|
AC_MSG_RESULT([no])
|
|
if test "x$enable_linux_builtin" != xyes; then
|
|
AC_MSG_ERROR([*** Unable to build an empty module.])
|
|
else
|
|
AC_MSG_ERROR([
|
|
*** Unable to build an empty module.
|
|
*** Please run 'make scripts' inside the kernel source tree.])
|
|
fi
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # Use the atomic implemenation based on global spinlocks. This
|
|
dnl # should only be needed by 32-bit kernels which do not provide
|
|
dnl # the atomic64_* API. It may be optionally enabled as a fallback
|
|
dnl # if problems are observed with the direct mapping to the native
|
|
dnl # Linux atomic operations. You may not disable atomic spinlocks
|
|
dnl # if you kernel does not an atomic64_* API.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_ATOMIC_SPINLOCK], [
|
|
AC_ARG_ENABLE([atomic-spinlocks],
|
|
[AS_HELP_STRING([--enable-atomic-spinlocks],
|
|
[Atomic types use spinlocks @<:@default=check@:>@])],
|
|
[],
|
|
[enable_atomic_spinlocks=check])
|
|
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
atomic64_t *ptr __attribute__ ((unused));
|
|
],[
|
|
have_atomic64_t=yes
|
|
AC_DEFINE(HAVE_ATOMIC64_T, 1,
|
|
[kernel defines atomic64_t])
|
|
],[
|
|
have_atomic64_t=no
|
|
])
|
|
|
|
AS_IF([test "x$enable_atomic_spinlocks" = xcheck], [
|
|
AS_IF([test "x$have_atomic64_t" = xyes], [
|
|
enable_atomic_spinlocks=no
|
|
],[
|
|
enable_atomic_spinlocks=yes
|
|
])
|
|
])
|
|
|
|
AS_IF([test "x$enable_atomic_spinlocks" = xyes], [
|
|
AC_DEFINE([ATOMIC_SPINLOCK], [1],
|
|
[Atomic types use spinlocks])
|
|
],[
|
|
AS_IF([test "x$have_atomic64_t" = xno], [
|
|
AC_MSG_FAILURE(
|
|
[--disable-atomic-spinlocks given but required atomic64 support is unavailable])
|
|
])
|
|
])
|
|
|
|
AC_MSG_CHECKING([whether atomic types use spinlocks])
|
|
AC_MSG_RESULT([$enable_atomic_spinlocks])
|
|
|
|
AC_MSG_CHECKING([whether kernel defines atomic64_t])
|
|
AC_MSG_RESULT([$have_atomic64_t])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.24 API change,
|
|
dnl # check if atomic64_cmpxchg is defined
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_TYPE_ATOMIC64_CMPXCHG],
|
|
[AC_MSG_CHECKING([whether kernel defines atomic64_cmpxchg])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
atomic64_cmpxchg((atomic64_t *)NULL, 0, 0);
|
|
],[
|
|
AC_MSG_RESULT([yes])
|
|
AC_DEFINE(HAVE_ATOMIC64_CMPXCHG, 1,
|
|
[kernel defines atomic64_cmpxchg])
|
|
],[
|
|
AC_MSG_RESULT([no])
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.24 API change,
|
|
dnl # check if atomic64_xchg is defined
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_TYPE_ATOMIC64_XCHG],
|
|
[AC_MSG_CHECKING([whether kernel defines atomic64_xchg])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
atomic64_xchg((atomic64_t *)NULL, 0);
|
|
],[
|
|
AC_MSG_RESULT([yes])
|
|
AC_DEFINE(HAVE_ATOMIC64_XCHG, 1,
|
|
[kernel defines atomic64_xchg])
|
|
],[
|
|
AC_MSG_RESULT([no])
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.24 API change,
|
|
dnl # check if uintptr_t typedef is defined
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_TYPE_UINTPTR_T],
|
|
[AC_MSG_CHECKING([whether kernel defines uintptr_t])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/types.h>
|
|
],[
|
|
uintptr_t *ptr __attribute__ ((unused));
|
|
],[
|
|
AC_MSG_RESULT([yes])
|
|
AC_DEFINE(HAVE_UINTPTR_T, 1,
|
|
[kernel defines uintptr_t])
|
|
],[
|
|
AC_MSG_RESULT([no])
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.21 API change,
|
|
dnl # 'register_sysctl_table' use only one argument instead of two
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_2ARGS_REGISTER_SYSCTL],
|
|
[AC_MSG_CHECKING([whether register_sysctl_table() wants 2 args])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/sysctl.h>
|
|
],[
|
|
(void) register_sysctl_table(NULL, 0);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_2ARGS_REGISTER_SYSCTL, 1,
|
|
[register_sysctl_table() wants 2 args])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
AC_DEFUN([SPL_AC_SHRINKER_CALLBACK],[
|
|
tmp_flags="$EXTRA_KCFLAGS"
|
|
EXTRA_KCFLAGS="-Werror"
|
|
dnl #
|
|
dnl # 2.6.23 to 2.6.34 API change
|
|
dnl # ->shrink(int nr_to_scan, gfp_t gfp_mask)
|
|
dnl #
|
|
AC_MSG_CHECKING([whether old 2-argument shrinker exists])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/mm.h>
|
|
|
|
int shrinker_cb(int nr_to_scan, gfp_t gfp_mask);
|
|
],[
|
|
struct shrinker cache_shrinker = {
|
|
.shrink = shrinker_cb,
|
|
.seeks = DEFAULT_SEEKS,
|
|
};
|
|
register_shrinker(&cache_shrinker);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_2ARGS_OLD_SHRINKER_CALLBACK, 1,
|
|
[old shrinker callback wants 2 args])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
dnl #
|
|
dnl # 2.6.35 - 2.6.39 API change
|
|
dnl # ->shrink(struct shrinker *,
|
|
dnl # int nr_to_scan, gfp_t gfp_mask)
|
|
dnl #
|
|
AC_MSG_CHECKING([whether old 3-argument shrinker exists])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/mm.h>
|
|
|
|
int shrinker_cb(struct shrinker *, int nr_to_scan,
|
|
gfp_t gfp_mask);
|
|
],[
|
|
struct shrinker cache_shrinker = {
|
|
.shrink = shrinker_cb,
|
|
.seeks = DEFAULT_SEEKS,
|
|
};
|
|
register_shrinker(&cache_shrinker);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_3ARGS_SHRINKER_CALLBACK, 1,
|
|
[old shrinker callback wants 3 args])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
dnl #
|
|
dnl # 3.0 - 3.11 API change
|
|
dnl # ->shrink(struct shrinker *,
|
|
dnl # struct shrink_control *sc)
|
|
dnl #
|
|
AC_MSG_CHECKING(
|
|
[whether new 2-argument shrinker exists])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/mm.h>
|
|
|
|
int shrinker_cb(struct shrinker *,
|
|
struct shrink_control *sc);
|
|
],[
|
|
struct shrinker cache_shrinker = {
|
|
.shrink = shrinker_cb,
|
|
.seeks = DEFAULT_SEEKS,
|
|
};
|
|
register_shrinker(&cache_shrinker);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_2ARGS_NEW_SHRINKER_CALLBACK, 1,
|
|
[new shrinker callback wants 2 args])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
dnl #
|
|
dnl # 3.12 API change,
|
|
dnl # ->shrink() is logically split in to
|
|
dnl # ->count_objects() and ->scan_objects()
|
|
dnl #
|
|
AC_MSG_CHECKING(
|
|
[whether ->count_objects callback exists])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/mm.h>
|
|
|
|
unsigned long shrinker_cb(
|
|
struct shrinker *,
|
|
struct shrink_control *sc);
|
|
],[
|
|
struct shrinker cache_shrinker = {
|
|
.count_objects = shrinker_cb,
|
|
.scan_objects = shrinker_cb,
|
|
.seeks = DEFAULT_SEEKS,
|
|
};
|
|
register_shrinker(&cache_shrinker);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_SPLIT_SHRINKER_CALLBACK,
|
|
1, [->count_objects exists])
|
|
],[
|
|
AC_MSG_ERROR(error)
|
|
])
|
|
])
|
|
])
|
|
])
|
|
EXTRA_KCFLAGS="$tmp_flags"
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.25 API change,
|
|
dnl # struct path entry added to struct nameidata
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_PATH_IN_NAMEIDATA],
|
|
[AC_MSG_CHECKING([whether struct path used in struct nameidata])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/namei.h>
|
|
],[
|
|
struct nameidata nd __attribute__ ((unused));
|
|
|
|
nd.path.mnt = NULL;
|
|
nd.path.dentry = NULL;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_PATH_IN_NAMEIDATA, 1,
|
|
[struct path used in struct nameidata])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # Custom SPL patch may export this system it is not required
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_TASK_CURR],
|
|
[AC_MSG_CHECKING([whether task_curr() is available])
|
|
SPL_LINUX_TRY_COMPILE_SYMBOL([
|
|
#include <linux/sched.h>
|
|
], [
|
|
task_curr(NULL);
|
|
], [task_curr], [kernel/sched.c], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_TASK_CURR, 1, [task_curr() is available])
|
|
], [
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.19 API change,
|
|
dnl # Use CTL_UNNUMBERED when binary sysctl is not required
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_CTL_UNNUMBERED],
|
|
[AC_MSG_CHECKING([whether unnumbered sysctl support exists])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/sysctl.h>
|
|
],[
|
|
#ifndef CTL_UNNUMBERED
|
|
#error CTL_UNNUMBERED undefined
|
|
#endif
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_CTL_UNNUMBERED, 1,
|
|
[unnumbered sysctl support exists])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.33 API change,
|
|
dnl # Removed .ctl_name from struct ctl_table.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_CTL_NAME], [
|
|
AC_MSG_CHECKING([whether struct ctl_table has ctl_name])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/sysctl.h>
|
|
],[
|
|
struct ctl_table ctl __attribute__ ((unused));
|
|
ctl.ctl_name = 0;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_CTL_NAME, 1, [struct ctl_table has ctl_name])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.16 API change.
|
|
dnl # Check if 'fls64()' is available
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_FLS64],
|
|
[AC_MSG_CHECKING([whether fls64() is available])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/bitops.h>
|
|
],[
|
|
return fls64(0);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_FLS64, 1, [fls64() is available])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.18 API change, check whether device_create() is available.
|
|
dnl # Device_create() was introduced in 2.6.18 and depricated
|
|
dnl # class_device_create() which was fully removed in 2.6.26.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_DEVICE_CREATE],
|
|
[AC_MSG_CHECKING([whether device_create() is available])
|
|
SPL_CHECK_SYMBOL_EXPORT([device_create], [drivers/base/core.c], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_DEVICE_CREATE, 1,
|
|
[device_create() is available])
|
|
], [
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.27 API change,
|
|
dnl # device_create() uses 5 args, new 'drvdata' argument.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_5ARGS_DEVICE_CREATE], [
|
|
AC_MSG_CHECKING([whether device_create() wants 5 args])
|
|
tmp_flags="$EXTRA_KCFLAGS"
|
|
EXTRA_KCFLAGS="-Werror"
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/device.h>
|
|
],[
|
|
device_create(NULL, NULL, 0, NULL, "%d", 1);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_5ARGS_DEVICE_CREATE, 1,
|
|
[device_create wants 5 args])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
EXTRA_KCFLAGS="$tmp_flags"
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.13 API change, check whether class_device_create() is available.
|
|
dnl # Class_device_create() was introduced in 2.6.13 and depricated
|
|
dnl # class_simple_device_add() which was fully removed in 2.6.13.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_CLASS_DEVICE_CREATE],
|
|
[AC_MSG_CHECKING([whether class_device_create() is available])
|
|
SPL_LINUX_TRY_COMPILE_SYMBOL([
|
|
#include <linux/device.h>
|
|
], [
|
|
class_device_create(NULL, NULL, 0, NULL, NULL);
|
|
], [class_device_create], [drivers/base/class.c], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_CLASS_DEVICE_CREATE, 1,
|
|
[class_device_create() is available])
|
|
], [
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.26 API change, set_normalized_timespec() is exported.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_SET_NORMALIZED_TIMESPEC_EXPORT],
|
|
[AC_MSG_CHECKING([whether set_normalized_timespec() is available as export])
|
|
SPL_LINUX_TRY_COMPILE_SYMBOL([
|
|
#include <linux/time.h>
|
|
], [
|
|
set_normalized_timespec(NULL, 0, 0);
|
|
], [set_normalized_timespec], [kernel/time.c], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_SET_NORMALIZED_TIMESPEC_EXPORT, 1,
|
|
[set_normalized_timespec() is available as export])
|
|
], [
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.16 API change, set_normalize_timespec() moved to time.c
|
|
dnl # previously it was available in time.h as an inline.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_SET_NORMALIZED_TIMESPEC_INLINE], [
|
|
AC_MSG_CHECKING([whether set_normalized_timespec() is an inline])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/time.h>
|
|
void set_normalized_timespec(struct timespec *ts,
|
|
time_t sec, long nsec) { }
|
|
],
|
|
[],
|
|
[
|
|
AC_MSG_RESULT(no)
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_SET_NORMALIZED_TIMESPEC_INLINE, 1,
|
|
[set_normalized_timespec() is available as inline])
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.18 API change,
|
|
dnl # timespec_sub() inline function available in linux/time.h
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_TIMESPEC_SUB], [
|
|
AC_MSG_CHECKING([whether timespec_sub() is available])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/time.h>
|
|
],[
|
|
struct timespec a = { 0 };
|
|
struct timespec b = { 0 };
|
|
struct timespec c __attribute__ ((unused));
|
|
c = timespec_sub(a, b);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_TIMESPEC_SUB, 1, [timespec_sub() is available])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.19 API change,
|
|
dnl # check if init_utsname() is available in linux/utsname.h
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_INIT_UTSNAME], [
|
|
AC_MSG_CHECKING([whether init_utsname() is available])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/utsname.h>
|
|
],[
|
|
struct new_utsname *a __attribute__ ((unused));
|
|
a = init_utsname();
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_INIT_UTSNAME, 1, [init_utsname() is available])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.18 API change,
|
|
dnl # added linux/uaccess.h
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_UACCESS_HEADER], [
|
|
SPL_CHECK_HEADER([linux/uaccess.h], [UACCESS], [], [])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.12 API change,
|
|
dnl # check whether 'kmalloc_node()' is available.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_KMALLOC_NODE], [
|
|
AC_MSG_CHECKING([whether kmalloc_node() is available])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/slab.h>
|
|
],[
|
|
void *a __attribute__ ((unused));
|
|
a = kmalloc_node(1, GFP_KERNEL, 0);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_KMALLOC_NODE, 1, [kmalloc_node() is available])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.9 API change,
|
|
dnl # check whether 'monotonic_clock()' is available it may
|
|
dnl # be available for some archs but not others.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_MONOTONIC_CLOCK],
|
|
[AC_MSG_CHECKING([whether monotonic_clock() is available])
|
|
SPL_LINUX_TRY_COMPILE_SYMBOL([
|
|
#include <linux/timex.h>
|
|
], [
|
|
monotonic_clock();
|
|
], [monotonic_clock], [], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_MONOTONIC_CLOCK, 1,
|
|
[monotonic_clock() is available])
|
|
], [
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.16 API change,
|
|
dnl # check whether 'struct inode' has i_mutex
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_INODE_I_MUTEX], [
|
|
AC_MSG_CHECKING([whether struct inode has i_mutex])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
#include <linux/mutex.h>
|
|
],[
|
|
struct inode i;
|
|
mutex_init(&i.i_mutex);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_INODE_I_MUTEX, 1, [struct inode has i_mutex])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.29 API change,
|
|
dnl # Adaptive mutexs introduced.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_MUTEX_OWNER], [
|
|
AC_MSG_CHECKING([whether struct mutex has owner])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/mutex.h>
|
|
],[
|
|
struct mutex mtx __attribute__ ((unused));
|
|
mtx.owner = NULL;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_MUTEX_OWNER, 1, [struct mutex has owner])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.39 API change,
|
|
dnl # Owner type change. A Linux mutex prior to 2.6.39 would store
|
|
dnl # the owner as a thread_info pointer when CONFIG_DEBUG_MUTEXES
|
|
dnl # was defined. As of 2.6.39 this was changed to a task_struct
|
|
dnl # pointer which frankly makes a lot more sense.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_MUTEX_OWNER_TASK_STRUCT], [
|
|
AC_MSG_CHECKING([whether struct mutex owner is a task_struct])
|
|
tmp_flags="$EXTRA_KCFLAGS"
|
|
EXTRA_KCFLAGS="-Werror"
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/mutex.h>
|
|
#include <linux/sched.h>
|
|
],[
|
|
struct mutex mtx __attribute__ ((unused));
|
|
mtx.owner = current;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_MUTEX_OWNER_TASK_STRUCT, 1,
|
|
[struct mutex owner is a task_struct])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
EXTRA_KCFLAGS="$tmp_flags"
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.18 API change,
|
|
dnl # First introduced 'mutex_lock_nested()' in include/linux/mutex.h,
|
|
dnl # as part of the mutex validator. Fallback to using 'mutex_lock()'
|
|
dnl # if the mutex validator is disabled or otherwise unavailable.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_MUTEX_LOCK_NESTED], [
|
|
AC_MSG_CHECKING([whether mutex_lock_nested() is available])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/mutex.h>
|
|
],[
|
|
struct mutex mutex;
|
|
mutex_init(&mutex);
|
|
mutex_lock_nested(&mutex, 0);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_MUTEX_LOCK_NESTED, 1,
|
|
[mutex_lock_nested() is available])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.27 API change,
|
|
dnl # on_each_cpu() uses 3 args, no 'retry' argument
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_3ARGS_ON_EACH_CPU], [
|
|
AC_MSG_CHECKING([whether on_each_cpu() wants 3 args])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/interrupt.h>
|
|
#include <linux/smp.h>
|
|
|
|
void on_each_cpu_func(void *data) { return; }
|
|
],[
|
|
on_each_cpu(on_each_cpu_func, NULL, 0);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_3ARGS_ON_EACH_CPU, 1,
|
|
[on_each_cpu wants 3 args])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.18 API change,
|
|
dnl # kallsyms_lookup_name no longer exported
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_KALLSYMS_LOOKUP_NAME],
|
|
[AC_MSG_CHECKING([whether kallsyms_lookup_name() is available])
|
|
SPL_LINUX_TRY_COMPILE_SYMBOL([
|
|
#include <linux/kallsyms.h>
|
|
], [
|
|
kallsyms_lookup_name(NULL);
|
|
], [kallsyms_lookup_name], [], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_KALLSYMS_LOOKUP_NAME, 1,
|
|
[kallsyms_lookup_name() is available])
|
|
], [
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # Proposed API change,
|
|
dnl # This symbol is not available in stock kernels. You may build a
|
|
dnl # custom kernel with the *-spl-export-symbols.patch which will export
|
|
dnl # these symbols for use. If your already rolling a custom kernel for
|
|
dnl # your environment this is recommended.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_GET_VMALLOC_INFO],
|
|
[AC_MSG_CHECKING([whether get_vmalloc_info() is available])
|
|
SPL_CHECK_SYMBOL_EXPORT([get_vmalloc_info], [], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_GET_VMALLOC_INFO, 1,
|
|
[get_vmalloc_info() is available])
|
|
], [
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 3.10 API change,
|
|
dnl # struct vmalloc_info is now declared in linux/vmalloc.h
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_VMALLOC_INFO], [
|
|
AC_MSG_CHECKING([whether struct vmalloc_info is declared])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/vmalloc.h>
|
|
struct vmalloc_info { void *a; };
|
|
],[
|
|
return 0;
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_VMALLOC_INFO, 1, [yes])
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 3.10 API change,
|
|
dnl # PDE is replaced by PDE_DATA
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_PDE_DATA], [
|
|
AC_MSG_CHECKING([whether PDE_DATA() is available])
|
|
SPL_LINUX_TRY_COMPILE_SYMBOL([
|
|
#include <linux/proc_fs.h>
|
|
], [
|
|
PDE_DATA(NULL);
|
|
], [PDE_DATA], [], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_PDE_DATA, 1, [yes])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.17 API change
|
|
dnl # The helper functions first_online_pgdat(), next_online_pgdat(), and
|
|
dnl # next_zone() are introduced to simplify for_each_zone(). These symbols
|
|
dnl # were exported in 2.6.17 for use by modules which was consistent with
|
|
dnl # the previous implementation of for_each_zone(). From 2.6.18 - 2.6.19
|
|
dnl # the symbols were exported as 'unused', and by 2.6.20 they exports
|
|
dnl # were dropped entirely leaving modules no way to directly iterate over
|
|
dnl # the zone list. Because we need access to the zone helpers we check
|
|
dnl # if the kernel contains the old or new implementation. Then we check
|
|
dnl # to see if the symbols we need for each version are available. If they
|
|
dnl # are not, dynamically aquire the addresses with kallsyms_lookup_name().
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_PGDAT_HELPERS], [
|
|
AC_MSG_CHECKING([whether symbol *_pgdat exist])
|
|
grep -q -E 'first_online_pgdat' $LINUX/include/linux/mmzone.h 2>/dev/null
|
|
rc=$?
|
|
if test $rc -eq 0; then
|
|
AC_MSG_RESULT([yes])
|
|
AC_DEFINE(HAVE_PGDAT_HELPERS, 1, [pgdat helpers are available])
|
|
else
|
|
AC_MSG_RESULT([no])
|
|
fi
|
|
])
|
|
|
|
dnl #
|
|
dnl # Proposed API change,
|
|
dnl # This symbol is not available in stock kernels. You may build a
|
|
dnl # custom kernel with the *-spl-export-symbols.patch which will export
|
|
dnl # these symbols for use. If your already rolling a custom kernel for
|
|
dnl # your environment this is recommended.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_FIRST_ONLINE_PGDAT],
|
|
[AC_MSG_CHECKING([whether first_online_pgdat() is available])
|
|
SPL_LINUX_TRY_COMPILE_SYMBOL([
|
|
#include <linux/mmzone.h>
|
|
], [
|
|
first_online_pgdat();
|
|
], [first_online_pgdat], [], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_FIRST_ONLINE_PGDAT, 1,
|
|
[first_online_pgdat() is available])
|
|
], [
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # Proposed API change,
|
|
dnl # This symbol is not available in stock kernels. You may build a
|
|
dnl # custom kernel with the *-spl-export-symbols.patch which will export
|
|
dnl # these symbols for use. If your already rolling a custom kernel for
|
|
dnl # your environment this is recommended.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_NEXT_ONLINE_PGDAT],
|
|
[AC_MSG_CHECKING([whether next_online_pgdat() is available])
|
|
SPL_LINUX_TRY_COMPILE_SYMBOL([
|
|
#include <linux/mmzone.h>
|
|
], [
|
|
next_online_pgdat(NULL);
|
|
], [next_online_pgdat], [], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_NEXT_ONLINE_PGDAT, 1,
|
|
[next_online_pgdat() is available])
|
|
], [
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # Proposed API change,
|
|
dnl # This symbol is not available in stock kernels. You may build a
|
|
dnl # custom kernel with the *-spl-export-symbols.patch which will export
|
|
dnl # these symbols for use. If your already rolling a custom kernel for
|
|
dnl # your environment this is recommended.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_NEXT_ZONE],
|
|
[AC_MSG_CHECKING([whether next_zone() is available])
|
|
SPL_LINUX_TRY_COMPILE_SYMBOL([
|
|
#include <linux/mmzone.h>
|
|
], [
|
|
next_zone(NULL);
|
|
], [next_zone], [], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_NEXT_ZONE, 1, [next_zone() is available])
|
|
], [
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.17 API change,
|
|
dnl # See SPL_AC_PGDAT_HELPERS for details.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_PGDAT_LIST],
|
|
[AC_MSG_CHECKING([whether pgdat_list is available])
|
|
SPL_LINUX_TRY_COMPILE_SYMBOL([
|
|
#include <linux/topology.h>
|
|
pg_data_t *tmp = pgdat_list;
|
|
], [], [pgdat_list], [], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_PGDAT_LIST, 1, [pgdat_list is available])
|
|
], [
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.18 API change,
|
|
dnl # First introduced global_page_state() support as an inline.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_GLOBAL_PAGE_STATE], [
|
|
AC_MSG_CHECKING([whether global_page_state() is available])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/mm.h>
|
|
],[
|
|
unsigned long state __attribute__ ((unused));
|
|
state = global_page_state(0);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_GLOBAL_PAGE_STATE, 1,
|
|
[global_page_state() is available])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.21 API change (plus subsequent naming convention changes),
|
|
dnl # Public global zone stats now include a free page count. However
|
|
dnl # the enumerated names of the counters have changed since this API
|
|
dnl # was introduced. We need to deduce the corrent name to use. This
|
|
dnl # replaces the priviate get_zone_counts() interface.
|
|
dnl #
|
|
dnl # NR_FREE_PAGES was available from 2.6.21 to current kernels, which
|
|
dnl # is 2.6.30 as of when this was written.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_FREE], [
|
|
AC_MSG_CHECKING([whether page state NR_FREE_PAGES is available])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/mm.h>
|
|
],[
|
|
enum zone_stat_item zsi __attribute__ ((unused));
|
|
zsi = NR_FREE_PAGES;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_FREE_PAGES, 1,
|
|
[Page state NR_FREE_PAGES is available])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.21 API change (plus subsequent naming convention changes),
|
|
dnl # Public global zone stats now include an inactive page count. However
|
|
dnl # the enumerated names of the counters have changed since this API
|
|
dnl # was introduced. We need to deduce the corrent name to use. This
|
|
dnl # replaces the priviate get_zone_counts() interface.
|
|
dnl #
|
|
dnl # NR_INACTIVE was available from 2.6.21 to 2.6.27 and included both
|
|
dnl # anonymous and file inactive pages. As of 2.6.28 it was split in
|
|
dnl # to NR_INACTIVE_ANON and NR_INACTIVE_FILE.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_INACTIVE], [
|
|
AC_MSG_CHECKING([whether page state NR_INACTIVE is available])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/mm.h>
|
|
],[
|
|
enum zone_stat_item zsi __attribute__ ((unused));
|
|
zsi = NR_INACTIVE;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE, 1,
|
|
[Page state NR_INACTIVE is available])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
|
|
AC_MSG_CHECKING([whether page state NR_INACTIVE_ANON is available])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/mm.h>
|
|
],[
|
|
enum zone_stat_item zsi __attribute__ ((unused));
|
|
zsi = NR_INACTIVE_ANON;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_ANON, 1,
|
|
[Page state NR_INACTIVE_ANON is available])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
|
|
AC_MSG_CHECKING([whether page state NR_INACTIVE_FILE is available])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/mm.h>
|
|
],[
|
|
enum zone_stat_item zsi __attribute__ ((unused));
|
|
zsi = NR_INACTIVE_FILE;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_FILE, 1,
|
|
[Page state NR_INACTIVE_FILE is available])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.21 API change (plus subsequent naming convention changes),
|
|
dnl # Public global zone stats now include an active page count. However
|
|
dnl # the enumerated names of the counters have changed since this API
|
|
dnl # was introduced. We need to deduce the corrent name to use. This
|
|
dnl # replaces the priviate get_zone_counts() interface.
|
|
dnl #
|
|
dnl # NR_ACTIVE was available from 2.6.21 to 2.6.27 and included both
|
|
dnl # anonymous and file active pages. As of 2.6.28 it was split in
|
|
dnl # to NR_ACTIVE_ANON and NR_ACTIVE_FILE.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_ACTIVE], [
|
|
AC_MSG_CHECKING([whether page state NR_ACTIVE is available])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/mm.h>
|
|
],[
|
|
enum zone_stat_item zsi __attribute__ ((unused));
|
|
zsi = NR_ACTIVE;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE, 1,
|
|
[Page state NR_ACTIVE is available])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
|
|
AC_MSG_CHECKING([whether page state NR_ACTIVE_ANON is available])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/mm.h>
|
|
],[
|
|
enum zone_stat_item zsi __attribute__ ((unused));
|
|
zsi = NR_ACTIVE_ANON;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_ANON, 1,
|
|
[Page state NR_ACTIVE_ANON is available])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
|
|
AC_MSG_CHECKING([whether page state NR_ACTIVE_FILE is available])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/mm.h>
|
|
],[
|
|
enum zone_stat_item zsi __attribute__ ((unused));
|
|
zsi = NR_ACTIVE_FILE;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_FILE, 1,
|
|
[Page state NR_ACTIVE_FILE is available])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # Proposed API change for legacy kernels.
|
|
dnl # This symbol is not available in older kernels. For kernels post
|
|
dnl # 2.6.21 the global_page_state() API is used to get free/inactive/active
|
|
dnl # page state information. This symbol is only used in legacy kernels
|
|
dnl # any only as a last resort.
|
|
dnl
|
|
AC_DEFUN([SPL_AC_GET_ZONE_COUNTS], [
|
|
AC_MSG_CHECKING([whether symbol get_zone_counts is needed])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
],[
|
|
#if !defined(HAVE_ZONE_STAT_ITEM_NR_FREE_PAGES)
|
|
#error "global_page_state needs NR_FREE_PAGES"
|
|
#endif
|
|
|
|
#if !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE) && \
|
|
!defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_ANON) && \
|
|
!defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_FILE)
|
|
#error "global_page_state needs NR_ACTIVE*"
|
|
#endif
|
|
|
|
#if !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE) && \
|
|
!defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_ANON) && \
|
|
!defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_FILE)
|
|
#error "global_page_state needs NR_INACTIVE*"
|
|
#endif
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(NEED_GET_ZONE_COUNTS, 1,
|
|
[get_zone_counts() is needed])
|
|
|
|
AC_MSG_CHECKING([whether get_zone_counts() is available])
|
|
SPL_LINUX_TRY_COMPILE_SYMBOL([
|
|
#include <linux/mmzone.h>
|
|
], [
|
|
get_zone_counts(NULL, NULL, NULL);
|
|
], [get_zone_counts], [], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_GET_ZONE_COUNTS, 1,
|
|
[get_zone_counts() is available])
|
|
], [
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.27 API change,
|
|
dnl # The user_path_dir() replaces __user_walk()
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_USER_PATH_DIR],
|
|
[AC_MSG_CHECKING([whether user_path_dir() is available])
|
|
SPL_LINUX_TRY_COMPILE_SYMBOL([
|
|
#include <linux/fcntl.h>
|
|
#include <linux/namei.h>
|
|
], [
|
|
user_path_dir(NULL, NULL);
|
|
], [user_path_at], [], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_USER_PATH_DIR, 1, [user_path_dir() is available])
|
|
], [
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # Symbol available in RHEL kernels not in stock kernels.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_SET_FS_PWD],
|
|
[AC_MSG_CHECKING([whether set_fs_pwd() is available])
|
|
SPL_LINUX_TRY_COMPILE_SYMBOL([
|
|
#include <linux/spinlock.h>
|
|
#include <linux/fs_struct.h>
|
|
], [
|
|
(void) set_fs_pwd;
|
|
], [set_fs_pwd], [], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_SET_FS_PWD, 1, [set_fs_pwd() is available])
|
|
], [
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 3.9 API change
|
|
dnl # set_fs_pwd takes const struct path *
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_SET_FS_PWD_WITH_CONST],
|
|
tmp_flags="$EXTRA_KCFLAGS"
|
|
EXTRA_KCFLAGS="-Werror"
|
|
[AC_MSG_CHECKING([whether set_fs_pwd() requires const struct path *])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/spinlock.h>
|
|
#include <linux/fs_struct.h>
|
|
#include <linux/path.h>
|
|
void (*const set_fs_pwd_func)
|
|
(struct fs_struct *, const struct path *)
|
|
= set_fs_pwd;
|
|
],[
|
|
return 0;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_SET_FS_PWD_WITH_CONST, 1,
|
|
[set_fs_pwd() needs const path *])
|
|
],[
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/spinlock.h>
|
|
#include <linux/fs_struct.h>
|
|
#include <linux/path.h>
|
|
void (*const set_fs_pwd_func)
|
|
(struct fs_struct *, struct path *)
|
|
= set_fs_pwd;
|
|
],[
|
|
return 0;
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
],[
|
|
AC_MSG_ERROR(unknown)
|
|
])
|
|
])
|
|
EXTRA_KCFLAGS="$tmp_flags"
|
|
])
|
|
|
|
AC_DEFUN([SPL_AC_2ARGS_VFS_UNLINK],
|
|
[AC_MSG_CHECKING([whether vfs_unlink() wants 2 args])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
vfs_unlink((struct inode *) NULL, (struct dentry *) NULL);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_2ARGS_VFS_UNLINK, 1,
|
|
[vfs_unlink() wants 2 args])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
dnl #
|
|
dnl # Linux 3.13 API change
|
|
dnl # Added delegated inode
|
|
dnl #
|
|
AC_MSG_CHECKING([whether vfs_unlink() wants 3 args])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
vfs_unlink((struct inode *) NULL,
|
|
(struct dentry *) NULL,
|
|
(struct inode **) NULL);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_3ARGS_VFS_UNLINK, 1,
|
|
[vfs_unlink() wants 3 args])
|
|
],[
|
|
AC_MSG_ERROR(no)
|
|
])
|
|
|
|
])
|
|
])
|
|
|
|
AC_DEFUN([SPL_AC_4ARGS_VFS_RENAME],
|
|
[AC_MSG_CHECKING([whether vfs_rename() wants 4 args])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
vfs_rename((struct inode *) NULL, (struct dentry *) NULL,
|
|
(struct inode *) NULL, (struct dentry *) NULL);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_4ARGS_VFS_RENAME, 1,
|
|
[vfs_rename() wants 4 args])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
dnl #
|
|
dnl # Linux 3.13 API change
|
|
dnl # Added delegated inode
|
|
dnl #
|
|
AC_MSG_CHECKING([whether vfs_rename() wants 5 args])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
vfs_rename((struct inode *) NULL,
|
|
(struct dentry *) NULL,
|
|
(struct inode *) NULL,
|
|
(struct dentry *) NULL,
|
|
(struct inode **) NULL);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_5ARGS_VFS_RENAME, 1,
|
|
[vfs_rename() wants 5 args])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
dnl #
|
|
dnl # Linux 3.15 API change
|
|
dnl # Added flags
|
|
dnl #
|
|
AC_MSG_CHECKING([whether vfs_rename() wants 6 args])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
vfs_rename((struct inode *) NULL,
|
|
(struct dentry *) NULL,
|
|
(struct inode *) NULL,
|
|
(struct dentry *) NULL,
|
|
(struct inode **) NULL,
|
|
(unsigned int) 0);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_6ARGS_VFS_RENAME, 1,
|
|
[vfs_rename() wants 6 args])
|
|
],[
|
|
AC_MSG_ERROR(no)
|
|
])
|
|
])
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.36 API change,
|
|
dnl # The 'struct fs_struct->lock' was changed from a rwlock_t to
|
|
dnl # a spinlock_t to improve the fastpath performance.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_FS_STRUCT_SPINLOCK], [
|
|
AC_MSG_CHECKING([whether struct fs_struct uses spinlock_t])
|
|
tmp_flags="$EXTRA_KCFLAGS"
|
|
EXTRA_KCFLAGS="-Werror"
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/sched.h>
|
|
#include <linux/fs_struct.h>
|
|
],[
|
|
struct fs_struct fs;
|
|
spin_lock_init(&fs.lock);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_FS_STRUCT_SPINLOCK, 1,
|
|
[struct fs_struct uses spinlock_t])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
EXTRA_KCFLAGS="$tmp_flags"
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.29 API change,
|
|
dnl # check whether 'struct cred' exists
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_CRED_STRUCT], [
|
|
AC_MSG_CHECKING([whether struct cred exists])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/cred.h>
|
|
],[
|
|
struct cred *cr __attribute__ ((unused));
|
|
cr = NULL;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_CRED_STRUCT, 1, [struct cred exists])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
|
|
dnl #
|
|
dnl # User namespaces, use kuid_t in place of uid_t
|
|
dnl # where available. Not strictly a user namespaces thing
|
|
dnl # but it should prevent surprises
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_KUIDGID_T], [
|
|
AC_MSG_CHECKING([whether kuid_t/kgid_t is available])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/uidgid.h>
|
|
], [
|
|
kuid_t userid = KUIDT_INIT(0);
|
|
kgid_t groupid = KGIDT_INIT(0);
|
|
],[
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/uidgid.h>
|
|
], [
|
|
kuid_t userid = 0;
|
|
kgid_t groupid = 0;
|
|
],[
|
|
AC_MSG_RESULT(yes; optional)
|
|
],[
|
|
AC_MSG_RESULT(yes; mandatory)
|
|
AC_DEFINE(HAVE_KUIDGID_T, 1, [kuid_t/kgid_t in use])
|
|
])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # Custom SPL patch may export this symbol.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_GROUPS_SEARCH],
|
|
[AC_MSG_CHECKING([whether groups_search() is available])
|
|
SPL_LINUX_TRY_COMPILE_SYMBOL([
|
|
#include <linux/cred.h>
|
|
#ifdef HAVE_KUIDGID_T
|
|
#include <linux/uidgid.h>
|
|
#endif
|
|
], [
|
|
#ifdef HAVE_KUIDGID_T
|
|
groups_search(NULL, KGIDT_INIT(0));
|
|
#else
|
|
groups_search(NULL, 0);
|
|
#endif
|
|
], [groups_search], [], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_GROUPS_SEARCH, 1, [groups_search() is available])
|
|
], [
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.x API change,
|
|
dnl # __put_task_struct() was exported in RHEL5 but unavailable elsewhere.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_PUT_TASK_STRUCT],
|
|
[AC_MSG_CHECKING([whether __put_task_struct() is available])
|
|
SPL_LINUX_TRY_COMPILE_SYMBOL([
|
|
#include <linux/sched.h>
|
|
], [
|
|
__put_task_struct(NULL);
|
|
], [__put_task_struct], [], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_PUT_TASK_STRUCT, 1,
|
|
[__put_task_struct() is available])
|
|
], [
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.32 API change,
|
|
dnl # Unused 'struct file *' removed from prototype.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_5ARGS_PROC_HANDLER], [
|
|
AC_MSG_CHECKING([whether proc_handler() wants 5 args])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/sysctl.h>
|
|
],[
|
|
proc_dostring(NULL, 0, NULL, NULL, NULL);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_5ARGS_PROC_HANDLER, 1,
|
|
[proc_handler() wants 5 args])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.x API change,
|
|
dnl # kvasprintf() function added.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_KVASPRINTF],
|
|
[AC_MSG_CHECKING([whether kvasprintf() is available])
|
|
SPL_LINUX_TRY_COMPILE_SYMBOL([
|
|
#include <linux/kernel.h>
|
|
], [
|
|
kvasprintf(0, NULL, *((va_list*)NULL));
|
|
], [kvasprintf], [], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_KVASPRINTF, 1, [kvasprintf() is available])
|
|
], [
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.29 API change,
|
|
dnl # vfs_fsync() funcation added, prior to this use file_fsync().
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_VFS_FSYNC],
|
|
[AC_MSG_CHECKING([whether vfs_fsync() is available])
|
|
SPL_LINUX_TRY_COMPILE_SYMBOL([
|
|
#include <linux/fs.h>
|
|
], [
|
|
(void) vfs_fsync;
|
|
], [vfs_fsync], [fs/sync.c], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_VFS_FSYNC, 1, [vfs_fsync() is available])
|
|
], [
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.35 API change,
|
|
dnl # Unused 'struct dentry *' removed from vfs_fsync() prototype.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_2ARGS_VFS_FSYNC], [
|
|
AC_MSG_CHECKING([whether vfs_fsync() wants 2 args])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
vfs_fsync(NULL, 0);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_2ARGS_VFS_FSYNC, 1, [vfs_fsync() wants 2 args])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 3.5 API change,
|
|
dnl # inode_operations.truncate_range removed
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_INODE_TRUNCATE_RANGE], [
|
|
AC_MSG_CHECKING([whether truncate_range() inode operation is available])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
struct inode_operations ops;
|
|
ops.truncate_range = NULL;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_INODE_TRUNCATE_RANGE, 1,
|
|
[truncate_range() inode operation is available])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # Linux 2.6.38 - 3.x API
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_KERNEL_FILE_FALLOCATE], [
|
|
AC_MSG_CHECKING([whether fops->fallocate() exists])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
long (*fallocate) (struct file *, int, loff_t, loff_t) = NULL;
|
|
struct file_operations fops __attribute__ ((unused)) = {
|
|
.fallocate = fallocate,
|
|
};
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_FILE_FALLOCATE, 1, [fops->fallocate() exists])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # Linux 2.6.x - 2.6.37 API
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_KERNEL_INODE_FALLOCATE], [
|
|
AC_MSG_CHECKING([whether iops->fallocate() exists])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
long (*fallocate) (struct inode *, int, loff_t, loff_t) = NULL;
|
|
struct inode_operations fops __attribute__ ((unused)) = {
|
|
.fallocate = fallocate,
|
|
};
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_INODE_FALLOCATE, 1, [fops->fallocate() exists])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # PaX Linux 2.6.38 - 3.x API
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_PAX_KERNEL_FILE_FALLOCATE], [
|
|
AC_MSG_CHECKING([whether fops->fallocate() exists])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
long (*fallocate) (struct file *, int, loff_t, loff_t) = NULL;
|
|
struct file_operations_no_const fops __attribute__ ((unused)) = {
|
|
.fallocate = fallocate,
|
|
};
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_FILE_FALLOCATE, 1, [fops->fallocate() exists])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # The fallocate callback was moved from the inode_operations
|
|
dnl # structure to the file_operations structure.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_KERNEL_FALLOCATE], [
|
|
SPL_AC_KERNEL_FILE_FALLOCATE
|
|
SPL_AC_KERNEL_INODE_FALLOCATE
|
|
SPL_AC_PAX_KERNEL_FILE_FALLOCATE
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.33 API change. Also backported in RHEL5 as of 2.6.18-190.el5.
|
|
dnl # Earlier versions of rwsem_is_locked() were inline and had a race
|
|
dnl # condition. The fixed version is exported as a symbol. The race
|
|
dnl # condition is fixed by acquiring sem->wait_lock, so we must not
|
|
dnl # call that version while holding sem->wait_lock.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_EXPORTED_RWSEM_IS_LOCKED],
|
|
[AC_MSG_CHECKING([whether rwsem_is_locked() acquires sem->wait_lock])
|
|
SPL_LINUX_TRY_COMPILE_SYMBOL([
|
|
#include <linux/rwsem.h>
|
|
int rwsem_is_locked(struct rw_semaphore *sem) { return 0; }
|
|
], [], [rwsem_is_locked], [lib/rwsem-spinlock.c], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(RWSEM_IS_LOCKED_TAKES_WAIT_LOCK, 1,
|
|
[rwsem_is_locked() acquires sem->wait_lock])
|
|
], [
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.xx API compat,
|
|
dnl # There currently exists no exposed API to partially shrink the dcache.
|
|
dnl # The expected mechanism to shrink the cache is a registered shrinker
|
|
dnl # which is called during memory pressure.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_SHRINK_DCACHE_MEMORY],
|
|
[AC_MSG_CHECKING([whether shrink_dcache_memory() is available])
|
|
SPL_LINUX_TRY_COMPILE_SYMBOL([
|
|
#include <linux/dcache.h>
|
|
], [
|
|
shrink_dcache_memory(0, 0);
|
|
], [shrink_dcache_memory], [fs/dcache.c], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_SHRINK_DCACHE_MEMORY, 1,
|
|
[shrink_dcache_memory() is available])
|
|
], [
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.xx API compat,
|
|
dnl # There currently exists no exposed API to partially shrink the icache.
|
|
dnl # The expected mechanism to shrink the cache is a registered shrinker
|
|
dnl # which is called during memory pressure.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_SHRINK_ICACHE_MEMORY],
|
|
[AC_MSG_CHECKING([whether shrink_icache_memory() is available])
|
|
SPL_LINUX_TRY_COMPILE_SYMBOL([
|
|
#include <linux/dcache.h>
|
|
], [
|
|
shrink_icache_memory(0, 0);
|
|
], [shrink_icache_memory], [fs/inode.c], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_SHRINK_ICACHE_MEMORY, 1,
|
|
[shrink_icache_memory() is available])
|
|
], [
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.39 API compat,
|
|
dnl # The path_lookup() function has been renamed to kern_path_parent()
|
|
dnl # and the flags argument has been removed. The only behavior now
|
|
dnl # offered is that of LOOKUP_PARENT. The spl already always passed
|
|
dnl # this flag so dropping the flag does not impact us.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_KERN_PATH_PARENT_HEADER], [
|
|
SPL_CHECK_SYMBOL_HEADER(
|
|
[kern_path_parent],
|
|
[int kern_path_parent(const char \*, struct nameidata \*)],
|
|
[include/linux/namei.h],
|
|
[AC_DEFINE(HAVE_KERN_PATH_PARENT_HEADER, 1,
|
|
[kern_path_parent() is available])],
|
|
[])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 3.1 API compat,
|
|
dnl # The kern_path_parent() symbol is no longer exported by the kernel.
|
|
dnl # However, it remains the prefered interface and since we still have
|
|
dnl # access to the prototype we dynamically lookup the required address.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_KERN_PATH_PARENT_SYMBOL],
|
|
[AC_MSG_CHECKING([whether kern_path_parent() is available])
|
|
SPL_LINUX_TRY_COMPILE_SYMBOL([
|
|
#include <linux/namei.h>
|
|
], [
|
|
kern_path_parent(NULL, NULL);
|
|
], [kern_path_parent], [fs/namei.c], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_KERN_PATH_PARENT_SYMBOL, 1,
|
|
[kern_path_parent() is available])
|
|
], [
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 3.6 API compat,
|
|
dnl # The kern_path_parent() function was replaced by the kern_path_locked()
|
|
dnl # function to eliminate all struct nameidata usage outside fs/namei.c.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_KERN_PATH_LOCKED], [
|
|
SPL_CHECK_SYMBOL_HEADER(
|
|
[kern_path_locked],
|
|
[struct dentry \*kern_path_locked(const char \*, struct path \*)],
|
|
[include/linux/namei.h],
|
|
[AC_DEFINE(HAVE_KERN_PATH_LOCKED, 1,
|
|
[kern_path_locked() is available])],
|
|
[])
|
|
])
|
|
|
|
dnl #
|
|
dnl # /proc/kallsyms support,
|
|
dnl # Verify the kernel has CONFIG_KALLSYMS support enabled.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_CONFIG_KALLSYMS], [
|
|
AC_MSG_CHECKING([whether CONFIG_KALLSYMS is defined])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#if !defined(CONFIG_KALLSYMS)
|
|
#error CONFIG_KALLSYMS not defined
|
|
#endif
|
|
],[ ],[
|
|
AC_MSG_RESULT([yes])
|
|
],[
|
|
AC_MSG_RESULT([no])
|
|
AC_MSG_ERROR([
|
|
*** This kernel does not include the required kallsyms support.
|
|
*** Rebuild the kernel with CONFIG_KALLSYMS=y set.])
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # zlib inflate compat,
|
|
dnl # Verify the kernel has CONFIG_ZLIB_INFLATE support enabled.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_CONFIG_ZLIB_INFLATE], [
|
|
AC_MSG_CHECKING([whether CONFIG_ZLIB_INFLATE is defined])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#if !defined(CONFIG_ZLIB_INFLATE) && \
|
|
!defined(CONFIG_ZLIB_INFLATE_MODULE)
|
|
#error CONFIG_ZLIB_INFLATE not defined
|
|
#endif
|
|
],[ ],[
|
|
AC_MSG_RESULT([yes])
|
|
],[
|
|
AC_MSG_RESULT([no])
|
|
AC_MSG_ERROR([
|
|
*** This kernel does not include the required zlib inflate support.
|
|
*** Rebuild the kernel with CONFIG_ZLIB_INFLATE=y|m set.])
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # zlib deflate compat,
|
|
dnl # Verify the kernel has CONFIG_ZLIB_DEFLATE support enabled.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_CONFIG_ZLIB_DEFLATE], [
|
|
AC_MSG_CHECKING([whether CONFIG_ZLIB_DEFLATE is defined])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#if !defined(CONFIG_ZLIB_DEFLATE) && \
|
|
!defined(CONFIG_ZLIB_DEFLATE_MODULE)
|
|
#error CONFIG_ZLIB_DEFLATE not defined
|
|
#endif
|
|
],[ ],[
|
|
AC_MSG_RESULT([yes])
|
|
],[
|
|
AC_MSG_RESULT([no])
|
|
AC_MSG_ERROR([
|
|
*** This kernel does not include the required zlib deflate support.
|
|
*** Rebuild the kernel with CONFIG_ZLIB_DEFLATE=y|m set.])
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.39 API compat,
|
|
dnl # The function zlib_deflate_workspacesize() now take 2 arguments.
|
|
dnl # This was done to avoid always having to allocate the maximum size
|
|
dnl # workspace (268K). The caller can now specific the windowBits and
|
|
dnl # memLevel compression parameters to get a smaller workspace.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE],
|
|
[AC_MSG_CHECKING([whether zlib_deflate_workspacesize() wants 2 args])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/zlib.h>
|
|
],[
|
|
return zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE, 1,
|
|
[zlib_deflate_workspacesize() wants 2 args])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.39 API change,
|
|
dnl # Shrinker adjust to use common shrink_control structure.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_SHRINK_CONTROL_STRUCT], [
|
|
AC_MSG_CHECKING([whether struct shrink_control exists])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/mm.h>
|
|
],[
|
|
struct shrink_control sc __attribute__ ((unused));
|
|
|
|
sc.nr_to_scan = 0;
|
|
sc.gfp_mask = GFP_KERNEL;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_SHRINK_CONTROL_STRUCT, 1,
|
|
[struct shrink_control exists])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 3.1 API Change
|
|
dnl #
|
|
dnl # The rw_semaphore.wait_lock member was changed from spinlock_t to
|
|
dnl # raw_spinlock_t at commit ddb6c9b58a19edcfac93ac670b066c836ff729f1.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_RWSEM_SPINLOCK_IS_RAW], [
|
|
AC_MSG_CHECKING([whether struct rw_semaphore member wait_lock is raw])
|
|
tmp_flags="$EXTRA_KCFLAGS"
|
|
EXTRA_KCFLAGS="-Werror"
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/rwsem.h>
|
|
],[
|
|
struct rw_semaphore dummy_semaphore __attribute__ ((unused));
|
|
raw_spinlock_t dummy_lock __attribute__ ((unused));
|
|
dummy_semaphore.wait_lock = dummy_lock;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(RWSEM_SPINLOCK_IS_RAW, 1,
|
|
[struct rw_semaphore member wait_lock is raw_spinlock_t])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
EXTRA_KCFLAGS="$tmp_flags"
|
|
])
|
|
|
|
dnl #
|
|
dnl # 3.9 API change,
|
|
dnl # Moved things from linux/sched.h to linux/sched/rt.h
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_SCHED_RT_HEADER],
|
|
[AC_MSG_CHECKING([whether header linux/sched/rt.h exists])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/sched.h>
|
|
#include <linux/sched/rt.h>
|
|
],[
|
|
return 0;
|
|
],[
|
|
AC_DEFINE(HAVE_SCHED_RT_HEADER, 1, [linux/sched/rt.h exists])
|
|
AC_MSG_RESULT(yes)
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 3.9 API change,
|
|
dnl # vfs_getattr() uses 2 args
|
|
dnl # It takes struct path * instead of struct vfsmount * and struct dentry *
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_2ARGS_VFS_GETATTR], [
|
|
AC_MSG_CHECKING([whether vfs_getattr() wants])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
vfs_getattr((struct path *) NULL,
|
|
(struct kstat *)NULL);
|
|
],[
|
|
AC_MSG_RESULT(2 args)
|
|
AC_DEFINE(HAVE_2ARGS_VFS_GETATTR, 1,
|
|
[vfs_getattr wants 2 args])
|
|
],[
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
vfs_getattr((struct vfsmount *)NULL,
|
|
(struct dentry *)NULL,
|
|
(struct kstat *)NULL);
|
|
],[
|
|
AC_MSG_RESULT(3 args)
|
|
],[
|
|
AC_MSG_ERROR(unknown)
|
|
])
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.36 API compatibility.
|
|
dnl # Added usleep_range timer.
|
|
dnl # usleep_range is a finer precision implementation of msleep
|
|
dnl # designed to be a drop-in replacement for udelay where a precise
|
|
dnl # sleep / busy-wait is unnecessary.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_USLEEP_RANGE], [
|
|
AC_MSG_CHECKING([whether usleep_range() is available])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/delay.h>
|
|
],[
|
|
usleep_range(0, 0);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_USLEEP_RANGE, 1,
|
|
[usleep_range is available])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.35 API change,
|
|
dnl # The cachep->gfpflags member was renamed cachep->allocflags. These are
|
|
dnl # private allocation flags which are applied when allocating a new slab
|
|
dnl # in kmem_getpages(). Unfortunately there is no public API for setting
|
|
dnl # non-default flags.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_KMEM_CACHE_ALLOCFLAGS], [
|
|
AC_MSG_CHECKING([whether struct kmem_cache has allocflags])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/slab.h>
|
|
],[
|
|
struct kmem_cache cachep __attribute__ ((unused));
|
|
cachep.allocflags = GFP_KERNEL;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_KMEM_CACHE_ALLOCFLAGS, 1,
|
|
[struct kmem_cache has allocflags])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
|
|
AC_MSG_CHECKING([whether struct kmem_cache has gfpflags])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/slab.h>
|
|
],[
|
|
struct kmem_cache cachep __attribute__ ((unused));
|
|
cachep.gfpflags = GFP_KERNEL;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_KMEM_CACHE_GFPFLAGS, 1,
|
|
[struct kmem_cache has gfpflags])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
])
|