2 dnl # Default ZFS kernel configuration
4 AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
11 ZFS_AC_KERNEL_DECLARE_EVENT_CLASS
12 ZFS_AC_KERNEL_CURRENT_BIO_TAIL
13 ZFS_AC_KERNEL_SUPER_USER_NS
14 ZFS_AC_KERNEL_SUBMIT_BIO
15 ZFS_AC_KERNEL_BDEV_BLOCK_DEVICE_OPERATIONS
16 ZFS_AC_KERNEL_BLOCK_DEVICE_OPERATIONS_RELEASE_VOID
17 ZFS_AC_KERNEL_TYPE_FMODE_T
18 ZFS_AC_KERNEL_3ARG_BLKDEV_GET
19 ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH
20 ZFS_AC_KERNEL_OPEN_BDEV_EXCLUSIVE
21 ZFS_AC_KERNEL_LOOKUP_BDEV
22 ZFS_AC_KERNEL_INVALIDATE_BDEV_ARGS
23 ZFS_AC_KERNEL_BDEV_LOGICAL_BLOCK_SIZE
24 ZFS_AC_KERNEL_BDEV_PHYSICAL_BLOCK_SIZE
25 ZFS_AC_KERNEL_BIO_BVEC_ITER
26 ZFS_AC_KERNEL_BIO_FAILFAST_DTD
27 ZFS_AC_KERNEL_REQ_FAILFAST_MASK
28 ZFS_AC_KERNEL_REQ_OP_DISCARD
29 ZFS_AC_KERNEL_REQ_OP_SECURE_ERASE
30 ZFS_AC_KERNEL_REQ_OP_FLUSH
31 ZFS_AC_KERNEL_BIO_BI_OPF
32 ZFS_AC_KERNEL_BIO_END_IO_T_ARGS
33 ZFS_AC_KERNEL_BIO_RW_BARRIER
34 ZFS_AC_KERNEL_BIO_RW_DISCARD
35 ZFS_AC_KERNEL_BLK_QUEUE_BDI
36 ZFS_AC_KERNEL_BLK_QUEUE_FLUSH
37 ZFS_AC_KERNEL_BLK_QUEUE_MAX_HW_SECTORS
38 ZFS_AC_KERNEL_BLK_QUEUE_MAX_SEGMENTS
39 ZFS_AC_KERNEL_BLK_QUEUE_HAVE_BIO_RW_UNPLUG
40 ZFS_AC_KERNEL_BLK_QUEUE_HAVE_BLK_PLUG
41 ZFS_AC_KERNEL_GET_DISK_RO
42 ZFS_AC_KERNEL_GET_GENDISK
43 ZFS_AC_KERNEL_HAVE_BIO_SET_OP_ATTRS
44 ZFS_AC_KERNEL_GENERIC_READLINK_GLOBAL
45 ZFS_AC_KERNEL_DISCARD_GRANULARITY
46 ZFS_AC_KERNEL_CONST_XATTR_HANDLER
47 ZFS_AC_KERNEL_XATTR_HANDLER_NAME
48 ZFS_AC_KERNEL_XATTR_HANDLER_GET
49 ZFS_AC_KERNEL_XATTR_HANDLER_SET
50 ZFS_AC_KERNEL_XATTR_HANDLER_LIST
51 ZFS_AC_KERNEL_INODE_OWNER_OR_CAPABLE
52 ZFS_AC_KERNEL_POSIX_ACL_FROM_XATTR_USERNS
53 ZFS_AC_KERNEL_POSIX_ACL_RELEASE
54 ZFS_AC_KERNEL_SET_CACHED_ACL_USABLE
55 ZFS_AC_KERNEL_POSIX_ACL_CHMOD
56 ZFS_AC_KERNEL_POSIX_ACL_EQUIV_MODE_WANTS_UMODE_T
57 ZFS_AC_KERNEL_POSIX_ACL_VALID_WITH_NS
58 ZFS_AC_KERNEL_INODE_OPERATIONS_PERMISSION
59 ZFS_AC_KERNEL_INODE_OPERATIONS_PERMISSION_WITH_NAMEIDATA
60 ZFS_AC_KERNEL_INODE_OPERATIONS_CHECK_ACL
61 ZFS_AC_KERNEL_INODE_OPERATIONS_CHECK_ACL_WITH_FLAGS
62 ZFS_AC_KERNEL_INODE_OPERATIONS_GET_ACL
63 ZFS_AC_KERNEL_INODE_OPERATIONS_SET_ACL
64 ZFS_AC_KERNEL_INODE_OPERATIONS_GETATTR
65 ZFS_AC_KERNEL_INODE_SET_FLAGS
66 ZFS_AC_KERNEL_GET_ACL_HANDLE_CACHE
67 ZFS_AC_KERNEL_SHOW_OPTIONS
68 ZFS_AC_KERNEL_FILE_INODE
69 ZFS_AC_KERNEL_FILE_DENTRY
71 ZFS_AC_KERNEL_EVICT_INODE
72 ZFS_AC_KERNEL_DIRTY_INODE_WITH_FLAGS
73 ZFS_AC_KERNEL_NR_CACHED_OBJECTS
74 ZFS_AC_KERNEL_FREE_CACHED_OBJECTS
75 ZFS_AC_KERNEL_FALLOCATE
76 ZFS_AC_KERNEL_AIO_FSYNC
77 ZFS_AC_KERNEL_MKDIR_UMODE_T
78 ZFS_AC_KERNEL_LOOKUP_NAMEIDATA
79 ZFS_AC_KERNEL_CREATE_NAMEIDATA
80 ZFS_AC_KERNEL_GET_LINK
81 ZFS_AC_KERNEL_PUT_LINK
83 ZFS_AC_KERNEL_TRUNCATE_RANGE
84 ZFS_AC_KERNEL_AUTOMOUNT
85 ZFS_AC_KERNEL_ENCODE_FH_WITH_INODE
86 ZFS_AC_KERNEL_COMMIT_METADATA
87 ZFS_AC_KERNEL_CLEAR_INODE
88 ZFS_AC_KERNEL_SETATTR_PREPARE
89 ZFS_AC_KERNEL_INSERT_INODE_LOCKED
90 ZFS_AC_KERNEL_D_MAKE_ROOT
91 ZFS_AC_KERNEL_D_OBTAIN_ALIAS
92 ZFS_AC_KERNEL_D_PRUNE_ALIASES
93 ZFS_AC_KERNEL_D_SET_D_OP
94 ZFS_AC_KERNEL_D_REVALIDATE_NAMEIDATA
95 ZFS_AC_KERNEL_CONST_DENTRY_OPERATIONS
96 ZFS_AC_KERNEL_TRUNCATE_SETSIZE
97 ZFS_AC_KERNEL_6ARGS_SECURITY_INODE_INIT_SECURITY
98 ZFS_AC_KERNEL_CALLBACK_SECURITY_INODE_INIT_SECURITY
99 ZFS_AC_KERNEL_MOUNT_NODEV
101 ZFS_AC_KERNEL_SHRINK_CONTROL_HAS_NID
102 ZFS_AC_KERNEL_S_INSTANCES_LIST_HEAD
105 ZFS_AC_KERNEL_SET_NLINK
106 ZFS_AC_KERNEL_ELEVATOR_CHANGE
107 ZFS_AC_KERNEL_5ARG_SGET
108 ZFS_AC_KERNEL_LSEEK_EXECUTE
109 ZFS_AC_KERNEL_VFS_ITERATE
110 ZFS_AC_KERNEL_VFS_RW_ITERATE
111 ZFS_AC_KERNEL_GENERIC_WRITE_CHECKS
112 ZFS_AC_KERNEL_KMAP_ATOMIC_ARGS
113 ZFS_AC_KERNEL_FOLLOW_DOWN_ONE
114 ZFS_AC_KERNEL_MAKE_REQUEST_FN
115 ZFS_AC_KERNEL_GENERIC_IO_ACCT
117 ZFS_AC_KERNEL_KUID_HELPERS
118 ZFS_AC_KERNEL_MODULE_PARAM_CALL_CONST
119 ZFS_AC_KERNEL_RENAME_WANTS_FLAGS
120 ZFS_AC_KERNEL_HAVE_GENERIC_SETXATTR
122 AS_IF([test "$LINUX_OBJ" != "$LINUX"], [
123 KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
125 AC_SUBST(KERNELMAKE_PARAMS)
128 dnl # -Wall -fno-strict-aliasing -Wstrict-prototypes and other
129 dnl # compiler options are added by the kernel build system.
130 KERNELCPPFLAGS="$KERNELCPPFLAGS -std=gnu99"
131 KERNELCPPFLAGS="$KERNELCPPFLAGS -Wno-declaration-after-statement"
132 KERNELCPPFLAGS="$KERNELCPPFLAGS $NO_UNUSED_BUT_SET_VARIABLE"
133 KERNELCPPFLAGS="$KERNELCPPFLAGS $NO_BOOL_COMPARE"
134 KERNELCPPFLAGS="$KERNELCPPFLAGS -DHAVE_SPL -D_KERNEL"
135 KERNELCPPFLAGS="$KERNELCPPFLAGS -DTEXT_DOMAIN=\\\"zfs-linux-kernel\\\""
137 AC_SUBST(KERNELCPPFLAGS)
141 dnl # Detect name used for Module.symvers file in kernel
143 AC_DEFUN([ZFS_AC_MODULE_SYMVERS], [
144 modpost=$LINUX/scripts/Makefile.modpost
145 AC_MSG_CHECKING([kernel file name for module symbols])
146 AS_IF([test "x$enable_linux_builtin" != xyes -a -f "$modpost"], [
147 AS_IF([grep -q Modules.symvers $modpost], [
148 LINUX_SYMBOLS=Modules.symvers
150 LINUX_SYMBOLS=Module.symvers
153 AS_IF([test ! -f "$LINUX_OBJ/$LINUX_SYMBOLS"], [
155 *** Please make sure the kernel devel package for your distribution
156 *** is installed. If you are building with a custom kernel, make sure the
157 *** kernel is configured, built, and the '--with-linux=PATH' configure
158 *** option refers to the location of the kernel source.])
163 AC_MSG_RESULT($LINUX_SYMBOLS)
164 AC_SUBST(LINUX_SYMBOLS)
168 dnl # Detect the kernel to be built against
170 AC_DEFUN([ZFS_AC_KERNEL], [
172 AS_HELP_STRING([--with-linux=PATH],
173 [Path to kernel source]),
174 [kernelsrc="$withval"])
176 AC_ARG_WITH(linux-obj,
177 AS_HELP_STRING([--with-linux-obj=PATH],
178 [Path to kernel build objects]),
179 [kernelbuild="$withval"])
181 AC_MSG_CHECKING([kernel source directory])
182 AS_IF([test -z "$kernelsrc"], [
183 AS_IF([test -e "/lib/modules/$(uname -r)/source"], [
184 headersdir="/lib/modules/$(uname -r)/source"
185 sourcelink=$(readlink -f "$headersdir")
186 ], [test -e "/lib/modules/$(uname -r)/build"], [
187 headersdir="/lib/modules/$(uname -r)/build"
188 sourcelink=$(readlink -f "$headersdir")
190 sourcelink=$(ls -1d /usr/src/kernels/* \
192 2>/dev/null | grep -v obj | tail -1)
195 AS_IF([test -n "$sourcelink" && test -e ${sourcelink}], [
196 kernelsrc=`readlink -f ${sourcelink}`
198 kernelsrc="[Not found]"
201 AS_IF([test "$kernelsrc" = "NONE"], [
206 AC_MSG_RESULT([$kernelsrc])
207 AS_IF([test ! -d "$kernelsrc"], [
209 *** Please make sure the kernel devel package for your distribution
210 *** is installed and then try again. If that fails, you can specify the
211 *** location of the kernel source with the '--with-linux=PATH' option.])
214 AC_MSG_CHECKING([kernel build directory])
215 AS_IF([test -z "$kernelbuild"], [
216 AS_IF([test -e "/lib/modules/$(uname -r)/build"], [
217 kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
218 ], [test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}], [
219 kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
220 ], [test -d ${kernelsrc}-obj/${target_cpu}/default], [
221 kernelbuild=${kernelsrc}-obj/${target_cpu}/default
222 ], [test -d `dirname ${kernelsrc}`/build-${target_cpu}], [
223 kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
225 kernelbuild=${kernelsrc}
228 AC_MSG_RESULT([$kernelbuild])
230 AC_MSG_CHECKING([kernel source version])
231 utsrelease1=$kernelbuild/include/linux/version.h
232 utsrelease2=$kernelbuild/include/linux/utsrelease.h
233 utsrelease3=$kernelbuild/include/generated/utsrelease.h
234 AS_IF([test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1], [
235 utsrelease=linux/version.h
236 ], [test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2], [
237 utsrelease=linux/utsrelease.h
238 ], [test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3], [
239 utsrelease=generated/utsrelease.h
242 AS_IF([test "$utsrelease"], [
243 kernsrcver=`(echo "#include <$utsrelease>";
244 echo "kernsrcver=UTS_RELEASE") |
245 cpp -I $kernelbuild/include |
246 grep "^kernsrcver=" | cut -d \" -f 2`
248 AS_IF([test -z "$kernsrcver"], [
249 AC_MSG_RESULT([Not found])
250 AC_MSG_ERROR([*** Cannot determine kernel version.])
253 AC_MSG_RESULT([Not found])
254 if test "x$enable_linux_builtin" != xyes; then
255 AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
258 *** Cannot find UTS_RELEASE definition.
259 *** Please run 'make prepare' inside the kernel source tree.])
263 AC_MSG_RESULT([$kernsrcver])
266 LINUX_OBJ=${kernelbuild}
267 LINUX_VERSION=${kernsrcver}
271 AC_SUBST(LINUX_VERSION)
273 ZFS_AC_MODULE_SYMVERS
278 dnl # Detect the SPL module to be built against
280 AC_DEFUN([ZFS_AC_SPL], [
282 AS_HELP_STRING([--with-spl=PATH],
283 [Path to spl source]),
284 AS_IF([test "$withval" = "yes"],
285 AC_MSG_ERROR([--with-spl=PATH requires a PATH]),
286 [splsrc="$withval"]))
288 AC_ARG_WITH([spl-obj],
289 AS_HELP_STRING([--with-spl-obj=PATH],
290 [Path to spl build objects]),
291 [splbuild="$withval"])
293 AC_ARG_WITH([spl-timeout],
294 AS_HELP_STRING([--with-spl-timeout=SECS],
295 [Wait SECS for SPL header and symver file @<:@default=0@:>@]),
296 [timeout="$withval"], [timeout=0])
299 dnl # The existence of spl.release.in is used to identify a valid
300 dnl # source directory. In order of preference:
302 splsrc0="/var/lib/dkms/spl/${VERSION}/build"
303 splsrc1="/usr/local/src/spl-${VERSION}/${LINUX_VERSION}"
304 splsrc2="/usr/local/src/spl-${VERSION}"
305 splsrc3="/usr/src/spl-${VERSION}/${LINUX_VERSION}"
306 splsrc4="/usr/src/spl-${VERSION}"
310 AC_MSG_CHECKING([spl source directory])
311 AS_IF([test -z "${splsrc}"], [
320 AS_IF([ test -e "${splsrc0}/spl.release.in"], [
322 ], [ test -e "${splsrc1}/spl.release.in"], [
324 ], [ test -e "${splsrc2}/spl.release.in"], [
326 ], [ test -e "${splsrc3}/spl.release.in"], [
327 splsrc=$(readlink -f "${splsrc3}")
328 ], [ test -e "${splsrc4}/spl.release.in" ], [
330 ], [ test -e "${splsrc5}/spl.release.in"], [
331 splsrc=$(readlink -f "${splsrc5}")
332 ], [ test -e "${splsrc6}/spl.release.in" ], [
338 [all_spl_sources="$withval"],
339 AS_IF([test "$splsrc" = "NONE"], [
345 AC_MSG_RESULT([$splsrc])
346 AS_IF([ test ! -e "$splsrc/spl.release.in"], [
348 *** Please make sure the kmod spl devel package for your distribution
349 *** is installed then try again. If that fails you can specify the
350 *** location of the spl source with the '--with-spl=PATH' option.
351 *** The spl version must match the version of ZFS you are building,
352 *** ${VERSION}. Failed to find spl.release.in in the following:
357 dnl # The existence of the spl_config.h is used to identify a valid
358 dnl # spl object directory. In many cases the object and source
359 dnl # directory are the same, however the objects may also reside
360 dnl # is a subdirectory named after the kernel version.
362 dnl # This file is supposed to be available after DKMS finishes
363 dnl # building the SPL kernel module for the target kernel. The
364 dnl # '--with-spl-timeout' option can be passed to pause here,
365 dnl # waiting for the file to appear from a concurrently building
368 AC_MSG_CHECKING([spl build directory])
370 all_spl_config_locs="${splsrc}/${LINUX_VERSION}
374 AS_IF([test -z "$splbuild"], [
375 AS_IF([ test -e "${splsrc}/${LINUX_VERSION}/spl_config.h" ], [
376 splbuild="${splsrc}/${LINUX_VERSION}"
377 ], [ test -e "${splsrc}/spl_config.h" ], [
379 ], [ find -L "${splsrc}" -name spl_config.h 2> /dev/null | grep -wq spl_config.h ], [
380 splbuild=$(find -L "${splsrc}" -name spl_config.h | sed 's,/spl_config.h,,')
382 splbuild="[Not found]"
385 AS_IF([test -e "$splbuild/spl_config.h" -o $timeout -le 0], [
389 timeout=$((timeout-1))
393 AC_MSG_RESULT([$splbuild])
394 AS_IF([ ! test -e "$splbuild/spl_config.h"], [
396 *** Please make sure the kmod spl devel <kernel> package for your
397 *** distribution is installed then try again. If that fails you
398 *** can specify the location of the spl objects with the
399 *** '--with-spl-obj=PATH' option. Failed to find spl_config.h in
400 *** any of the following:
401 $all_spl_config_locs])
404 AC_MSG_CHECKING([spl source version])
405 AS_IF([test -r $splbuild/spl_config.h &&
406 fgrep -q SPL_META_VERSION $splbuild/spl_config.h], [
408 splsrcver=`(echo "#include <spl_config.h>";
409 echo "splsrcver=SPL_META_VERSION-SPL_META_RELEASE") |
411 grep "^splsrcver=" | tr -d \" | cut -d= -f2`
414 AS_IF([test -z "$splsrcver"], [
415 AC_MSG_RESULT([Not found])
417 *** Cannot determine the version of the spl source.
418 *** Please prepare the spl source before running this script])
421 AC_MSG_RESULT([$splsrcver])
425 SPL_VERSION=${splsrcver}
429 AC_SUBST(SPL_VERSION)
432 dnl # Detect the name used for the SPL Module.symvers file. If one
433 dnl # does not exist this is likely because the SPL has been configured
434 dnl # but not built. The '--with-spl-timeout' option can be passed
435 dnl # to pause here, waiting for the file to appear from a concurrently
436 dnl # building SPL package. If the file does not appear in time, a good
437 dnl # guess is made as to what this file will be named based on what it
438 dnl # is named in the kernel build products. This file will first be
439 dnl # used at link time so if the guess is wrong the build will fail
440 dnl # then. This unfortunately means the ZFS package does not contain a
441 dnl # reliable mechanism to detect symbols exported by the SPL at
442 dnl # configure time.
444 AC_MSG_CHECKING([spl file name for module symbols])
448 AS_IF([test -r $SPL_OBJ/Module.symvers], [
449 SPL_SYMBOLS=Module.symvers
450 ], [test -r $SPL_OBJ/Modules.symvers], [
451 SPL_SYMBOLS=Modules.symvers
452 ], [test -r $SPL_OBJ/module/Module.symvers], [
453 SPL_SYMBOLS=Module.symvers
454 ], [test -r $SPL_OBJ/module/Modules.symvers], [
455 SPL_SYMBOLS=Modules.symvers
458 AS_IF([test $SPL_SYMBOLS != NONE -o $timeout -le 0], [
462 timeout=$((timeout-1))
466 AS_IF([test "$SPL_SYMBOLS" = NONE], [
467 SPL_SYMBOLS=$LINUX_SYMBOLS
470 AC_MSG_RESULT([$SPL_SYMBOLS])
471 AC_SUBST(SPL_SYMBOLS)
475 dnl # Detect the QAT module to be built against
476 dnl # QAT provides hardware acceleration for data compression:
477 dnl # https://01.org/intel-quickassist-technology
478 dnl # * Download and install QAT driver from the above link
479 dnl # * Start QAT driver in your system:
480 dnl # service qat_service start
481 dnl # * Enable QAT in ZFS, e.g.:
482 dnl # ./configure --with-qat=<qat-driver-path>/QAT1.6
484 dnl # * Set GZIP compression in ZFS dataset:
485 dnl # zfs set compression = gzip <dataset>
486 dnl # Then the data written to this ZFS pool is compressed
487 dnl # by QAT accelerator automatically, and de-compressed by
488 dnl # QAT when read from the pool.
489 dnl # * Get QAT hardware statistics by:
490 dnl # cat /proc/icp_dh895xcc_dev/qat
491 dnl # * To disable QAT:
492 dnl # insmod zfs.ko zfs_qat_disable=1
494 AC_DEFUN([ZFS_AC_QAT], [
496 AS_HELP_STRING([--with-qat=PATH],
497 [Path to qat source]),
498 AS_IF([test "$withval" = "yes"],
499 AC_MSG_ERROR([--with-qat=PATH requires a PATH]),
500 [qatsrc="$withval"]))
502 AC_ARG_WITH([qat-obj],
503 AS_HELP_STRING([--with-qat-obj=PATH],
504 [Path to qat build objects]),
505 [qatbuild="$withval"])
507 AS_IF([test ! -z "${qatsrc}"], [
508 AC_MSG_CHECKING([qat source directory])
509 AC_MSG_RESULT([$qatsrc])
510 QAT_SRC="${qatsrc}/quickassist"
511 AS_IF([ test ! -e "$QAT_SRC/include/cpa.h"], [
513 *** Please make sure the qat driver package is installed
514 *** and specify the location of the qat source with the
515 *** '--with-qat=PATH' option then try again. Failed to
521 AS_IF([test ! -z "${qatsrc}"], [
522 AC_MSG_CHECKING([qat build directory])
523 AS_IF([test -z "$qatbuild"], [
524 qatbuild="${qatsrc}/build"
527 AC_MSG_RESULT([$qatbuild])
529 AS_IF([ ! test -e "$QAT_OBJ/icp_qa_al.ko"], [
531 *** Please make sure the qat driver is installed then try again.
532 *** Failed to find icp_qa_al.ko in:
539 AC_DEFINE(HAVE_QAT, 1,
540 [qat is enabled and existed])
544 dnl # Detect the name used for the QAT Module.symvers file.
546 AS_IF([test ! -z "${qatsrc}"], [
547 AC_MSG_CHECKING([qat file for module symbols])
548 QAT_SYMBOLS=$QAT_SRC/lookaside/access_layer/src/Module.symvers
550 AS_IF([test -r $QAT_SYMBOLS], [
551 AC_MSG_RESULT([$QAT_SYMBOLS])
552 AC_SUBST(QAT_SYMBOLS)
555 *** Please make sure the qat driver is installed then try again.
556 *** Failed to find Module.symvers in:
564 dnl # Basic toolchain sanity check.
566 AC_DEFUN([ZFS_AC_TEST_MODULE], [
567 AC_MSG_CHECKING([whether modules can be built])
568 ZFS_LINUX_TRY_COMPILE([],[],[
572 if test "x$enable_linux_builtin" != xyes; then
573 AC_MSG_ERROR([*** Unable to build an empty module.])
576 *** Unable to build an empty module.
577 *** Please run 'make scripts' inside the kernel source tree.])
583 dnl # Certain kernel build options are not supported. These must be
584 dnl # detected at configure time and cause a build failure. Otherwise
585 dnl # modules may be successfully built that behave incorrectly.
587 AC_DEFUN([ZFS_AC_KERNEL_CONFIG], [
588 AS_IF([test "x$cross_compiling" != xyes], [
591 #include "$LINUX/include/linux/license.h"
593 return !license_is_gpl_compatible("$ZFS_META_LICENSE");
596 AC_DEFINE([ZFS_IS_GPL_COMPATIBLE], [1],
597 [Define to 1 if GPL-only symbols can be used])
602 ZFS_AC_KERNEL_CONFIG_THREAD_SIZE
603 ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC
607 dnl # Check configured THREAD_SIZE
609 dnl # The stack size will vary by architecture, but as of Linux 3.15 on x86_64
610 dnl # the default thread stack size was increased to 16K from 8K. Therefore,
611 dnl # on newer kernels and some architectures stack usage optimizations can be
612 dnl # conditionally applied to improve performance without negatively impacting
615 AC_DEFUN([ZFS_AC_KERNEL_CONFIG_THREAD_SIZE], [
616 AC_MSG_CHECKING([whether kernel was built with 16K or larger stacks])
617 ZFS_LINUX_TRY_COMPILE([
618 #include <linux/module.h>
620 #if (THREAD_SIZE < 16384)
621 #error "THREAD_SIZE is less than 16K"
625 AC_DEFINE(HAVE_LARGE_STACKS, 1, [kernel has large stacks])
632 dnl # Check CONFIG_DEBUG_LOCK_ALLOC
634 dnl # This is typically only set for debug kernels because it comes with
635 dnl # a performance penalty. However, when it is set it maps the non-GPL
636 dnl # symbol mutex_lock() to the GPL-only mutex_lock_nested() symbol.
637 dnl # This will cause a failure at link time which we'd rather know about
638 dnl # at compile time.
640 dnl # Since we plan to pursue making mutex_lock_nested() a non-GPL symbol
641 dnl # with the upstream community we add a check to detect this case.
643 AC_DEFUN([ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC], [
645 ZFS_LINUX_CONFIG([DEBUG_LOCK_ALLOC], [
646 AC_MSG_CHECKING([whether mutex_lock() is GPL-only])
647 tmp_flags="$EXTRA_KCFLAGS"
648 ZFS_LINUX_TRY_COMPILE([
649 #include <linux/module.h>
650 #include <linux/mutex.h>
652 MODULE_LICENSE("$ZFS_META_LICENSE");
664 *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible
665 *** with the CDDL license and will prevent the module linking stage
666 *** from succeeding. You must rebuild your kernel without this
667 *** option enabled.])
669 EXTRA_KCFLAGS="$tmp_flags"
674 dnl # ZFS_LINUX_CONFTEST_H
676 AC_DEFUN([ZFS_LINUX_CONFTEST_H], [
677 cat - <<_ACEOF >conftest.h
683 dnl # ZFS_LINUX_CONFTEST_C
685 AC_DEFUN([ZFS_LINUX_CONFTEST_C], [
686 cat confdefs.h - <<_ACEOF >conftest.c
692 dnl # ZFS_LANG_PROGRAM(C)([PROLOGUE], [BODY])
694 m4_define([ZFS_LANG_PROGRAM], [
699 dnl Do *not* indent the following line: there may be CPP directives.
700 dnl Don't move the `;' right after for the same reason.
708 dnl # ZFS_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
710 AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [
711 m4_ifvaln([$1], [ZFS_LINUX_CONFTEST_C([$1])])
712 m4_ifvaln([$6], [ZFS_LINUX_CONFTEST_H([$6])], [ZFS_LINUX_CONFTEST_H([])])
713 rm -Rf build && mkdir -p build && touch build/conftest.mod.c
714 echo "obj-m := conftest.o" >build/Makefile
716 test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
718 [AC_TRY_COMMAND(cp conftest.c conftest.h build && make [$2] -C $LINUX_OBJ EXTRA_CFLAGS="-Werror $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag) >/dev/null && AC_TRY_COMMAND([$3])],
720 [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
726 dnl # ZFS_LINUX_TRY_COMPILE like AC_TRY_COMPILE
728 AC_DEFUN([ZFS_LINUX_TRY_COMPILE],
729 [ZFS_LINUX_COMPILE_IFELSE(
730 [AC_LANG_SOURCE([ZFS_LANG_PROGRAM([[$1]], [[$2]])])],
732 [test -s build/conftest.o],
737 dnl # ZFS_LINUX_CONFIG
739 AC_DEFUN([ZFS_LINUX_CONFIG],
740 [AC_MSG_CHECKING([whether kernel was built with CONFIG_$1])
741 ZFS_LINUX_TRY_COMPILE([
742 #include <linux/module.h>
745 #error CONFIG_$1 not #defined
757 dnl # ZFS_CHECK_SYMBOL_EXPORT
758 dnl # check symbol exported or not
760 AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT], [
761 grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
762 $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
764 if test $rc -ne 0; then
767 grep -q -E "EXPORT_SYMBOL.*($1)" \
768 "$LINUX/$file" 2>/dev/null
770 if test $rc -eq 0; then
775 if test $export -eq 0; then :
786 dnl # ZFS_LINUX_TRY_COMPILE_SYMBOL
787 dnl # like ZFS_LINUX_TRY_COMPILE, except ZFS_CHECK_SYMBOL_EXPORT
788 dnl # is called if not compiling for builtin
790 AC_DEFUN([ZFS_LINUX_TRY_COMPILE_SYMBOL], [
791 ZFS_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1])
792 if test $rc -ne 0; then :
795 if test "x$enable_linux_builtin" != xyes; then
796 ZFS_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1])
798 if test $rc -ne 0; then :
807 dnl # ZFS_LINUX_TRY_COMPILE_HEADER
808 dnl # like ZFS_LINUX_TRY_COMPILE, except the contents conftest.h are
809 dnl # provided via the fifth parameter
811 AC_DEFUN([ZFS_LINUX_TRY_COMPILE_HEADER],
812 [ZFS_LINUX_COMPILE_IFELSE(
813 [AC_LANG_SOURCE([ZFS_LANG_PROGRAM([[$1]], [[$2]])])],
815 [test -s build/conftest.o],