2 dnl # Default ZFS kernel configuration
4 AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
5 AM_COND_IF([BUILD_LINUX], [
6 dnl # Setup the kernel build environment.
10 dnl # Sanity checks for module building and CONFIG_* defines
11 ZFS_AC_KERNEL_CONFIG_DEFINED
14 dnl # Sequential ZFS_LINUX_TRY_COMPILE tests
15 ZFS_AC_KERNEL_FPU_HEADER
16 ZFS_AC_KERNEL_OBJTOOL_HEADER
17 ZFS_AC_KERNEL_WAIT_QUEUE_ENTRY_T
18 ZFS_AC_KERNEL_MISC_MINOR
19 ZFS_AC_KERNEL_DECLARE_EVENT_CLASS
21 dnl # Parallel ZFS_LINUX_TEST_SRC / ZFS_LINUX_TEST_RESULT tests
22 ZFS_AC_KERNEL_TEST_SRC
23 ZFS_AC_KERNEL_TEST_RESULT
25 AS_IF([test "$LINUX_OBJ" != "$LINUX"], [
26 KERNEL_MAKE="$KERNEL_MAKE O=$LINUX_OBJ"
34 dnl # Generate and compile all of the kernel API test cases to determine
35 dnl # which interfaces are available. By invoking the kernel build system
36 dnl # only once the compilation can be done in parallel significantly
37 dnl # speeding up the process.
39 AC_DEFUN([ZFS_AC_KERNEL_TEST_SRC], [
40 ZFS_AC_KERNEL_SRC_OBJTOOL
41 ZFS_AC_KERNEL_SRC_GLOBAL_PAGE_STATE
42 ZFS_AC_KERNEL_SRC_ACCESS_OK_TYPE
43 ZFS_AC_KERNEL_SRC_PDE_DATA
44 ZFS_AC_KERNEL_SRC_FALLOCATE
45 ZFS_AC_KERNEL_SRC_FADVISE
46 ZFS_AC_KERNEL_SRC_GENERIC_FADVISE
47 ZFS_AC_KERNEL_SRC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE
48 ZFS_AC_KERNEL_SRC_RWSEM
49 ZFS_AC_KERNEL_SRC_SCHED
50 ZFS_AC_KERNEL_SRC_USLEEP_RANGE
51 ZFS_AC_KERNEL_SRC_KMEM_CACHE
52 ZFS_AC_KERNEL_SRC_KVMALLOC
53 ZFS_AC_KERNEL_SRC_VMALLOC_PAGE_KERNEL
54 ZFS_AC_KERNEL_SRC_WAIT
55 ZFS_AC_KERNEL_SRC_INODE_TIMES
56 ZFS_AC_KERNEL_SRC_INODE_LOCK
57 ZFS_AC_KERNEL_SRC_GROUP_INFO_GID
59 ZFS_AC_KERNEL_SRC_TIMER_SETUP
60 ZFS_AC_KERNEL_SRC_SUPER_USER_NS
61 ZFS_AC_KERNEL_SRC_PROC_OPERATIONS
62 ZFS_AC_KERNEL_SRC_BLOCK_DEVICE_OPERATIONS
64 ZFS_AC_KERNEL_SRC_BLKDEV
65 ZFS_AC_KERNEL_SRC_BLK_QUEUE
66 ZFS_AC_KERNEL_SRC_GENHD_FLAGS
67 ZFS_AC_KERNEL_SRC_REVALIDATE_DISK
68 ZFS_AC_KERNEL_SRC_GET_DISK_RO
69 ZFS_AC_KERNEL_SRC_GENERIC_READLINK_GLOBAL
70 ZFS_AC_KERNEL_SRC_DISCARD_GRANULARITY
71 ZFS_AC_KERNEL_SRC_INODE_OWNER_OR_CAPABLE
72 ZFS_AC_KERNEL_SRC_XATTR
74 ZFS_AC_KERNEL_SRC_INODE_SETATTR
75 ZFS_AC_KERNEL_SRC_INODE_GETATTR
76 ZFS_AC_KERNEL_SRC_INODE_SET_FLAGS
77 ZFS_AC_KERNEL_SRC_INODE_SET_IVERSION
78 ZFS_AC_KERNEL_SRC_SHOW_OPTIONS
79 ZFS_AC_KERNEL_SRC_FILE_INODE
80 ZFS_AC_KERNEL_SRC_FILE_DENTRY
81 ZFS_AC_KERNEL_SRC_FSYNC
82 ZFS_AC_KERNEL_SRC_AIO_FSYNC
83 ZFS_AC_KERNEL_SRC_EVICT_INODE
84 ZFS_AC_KERNEL_SRC_DIRTY_INODE
85 ZFS_AC_KERNEL_SRC_SHRINKER
86 ZFS_AC_KERNEL_SRC_MKDIR
87 ZFS_AC_KERNEL_SRC_LOOKUP_FLAGS
88 ZFS_AC_KERNEL_SRC_CREATE
89 ZFS_AC_KERNEL_SRC_PERMISSION
90 ZFS_AC_KERNEL_SRC_GET_LINK
91 ZFS_AC_KERNEL_SRC_PUT_LINK
92 ZFS_AC_KERNEL_SRC_TMPFILE
93 ZFS_AC_KERNEL_SRC_AUTOMOUNT
94 ZFS_AC_KERNEL_SRC_ENCODE_FH_WITH_INODE
95 ZFS_AC_KERNEL_SRC_COMMIT_METADATA
96 ZFS_AC_KERNEL_SRC_CLEAR_INODE
97 ZFS_AC_KERNEL_SRC_SETATTR_PREPARE
98 ZFS_AC_KERNEL_SRC_INSERT_INODE_LOCKED
99 ZFS_AC_KERNEL_SRC_DENTRY
100 ZFS_AC_KERNEL_SRC_DENTRY_ALIAS_D_U
101 ZFS_AC_KERNEL_SRC_TRUNCATE_SETSIZE
102 ZFS_AC_KERNEL_SRC_SECURITY_INODE
103 ZFS_AC_KERNEL_SRC_FST_MOUNT
104 ZFS_AC_KERNEL_SRC_BDI
105 ZFS_AC_KERNEL_SRC_SET_NLINK
106 ZFS_AC_KERNEL_SRC_SGET
107 ZFS_AC_KERNEL_SRC_LSEEK_EXECUTE
108 ZFS_AC_KERNEL_SRC_VFS_FILEMAP_DIRTY_FOLIO
109 ZFS_AC_KERNEL_SRC_VFS_READ_FOLIO
110 ZFS_AC_KERNEL_SRC_VFS_GETATTR
111 ZFS_AC_KERNEL_SRC_VFS_FSYNC_2ARGS
112 ZFS_AC_KERNEL_SRC_VFS_ITERATE
113 ZFS_AC_KERNEL_SRC_VFS_DIRECT_IO
114 ZFS_AC_KERNEL_SRC_VFS_READPAGES
115 ZFS_AC_KERNEL_SRC_VFS_SET_PAGE_DIRTY_NOBUFFERS
116 ZFS_AC_KERNEL_SRC_VFS_RW_ITERATE
117 ZFS_AC_KERNEL_SRC_VFS_GENERIC_WRITE_CHECKS
118 ZFS_AC_KERNEL_SRC_VFS_IOV_ITER
119 ZFS_AC_KERNEL_SRC_VFS_COPY_FILE_RANGE
120 ZFS_AC_KERNEL_SRC_VFS_GENERIC_COPY_FILE_RANGE
121 ZFS_AC_KERNEL_SRC_VFS_REMAP_FILE_RANGE
122 ZFS_AC_KERNEL_SRC_VFS_CLONE_FILE_RANGE
123 ZFS_AC_KERNEL_SRC_VFS_DEDUPE_FILE_RANGE
124 ZFS_AC_KERNEL_SRC_VFS_FILE_OPERATIONS_EXTEND
125 ZFS_AC_KERNEL_SRC_KMAP_ATOMIC_ARGS
126 ZFS_AC_KERNEL_SRC_FOLLOW_DOWN_ONE
127 ZFS_AC_KERNEL_SRC_MAKE_REQUEST_FN
128 ZFS_AC_KERNEL_SRC_GENERIC_IO_ACCT
129 ZFS_AC_KERNEL_SRC_FPU
130 ZFS_AC_KERNEL_SRC_FMODE_T
131 ZFS_AC_KERNEL_SRC_KUIDGID_T
132 ZFS_AC_KERNEL_SRC_KUID_HELPERS
133 ZFS_AC_KERNEL_SRC_RENAME
134 ZFS_AC_KERNEL_SRC_CURRENT_TIME
135 ZFS_AC_KERNEL_SRC_USERNS_CAPABILITIES
136 ZFS_AC_KERNEL_SRC_IN_COMPAT_SYSCALL
137 ZFS_AC_KERNEL_SRC_KTIME
138 ZFS_AC_KERNEL_SRC_TOTALRAM_PAGES_FUNC
139 ZFS_AC_KERNEL_SRC_TOTALHIGH_PAGES
140 ZFS_AC_KERNEL_SRC_KSTRTOUL
141 ZFS_AC_KERNEL_SRC_PERCPU
142 ZFS_AC_KERNEL_SRC_CPU_HOTPLUG
143 ZFS_AC_KERNEL_SRC_GENERIC_FILLATTR
144 ZFS_AC_KERNEL_SRC_MKNOD
145 ZFS_AC_KERNEL_SRC_SYMLINK
146 ZFS_AC_KERNEL_SRC_BIO_MAX_SEGS
147 ZFS_AC_KERNEL_SRC_SIGNAL_STOP
148 ZFS_AC_KERNEL_SRC_SIGINFO
149 ZFS_AC_KERNEL_SRC_SYSFS
150 ZFS_AC_KERNEL_SRC_SET_SPECIAL_STATE
151 ZFS_AC_KERNEL_SRC_STANDALONE_LINUX_STDARG
152 ZFS_AC_KERNEL_SRC_STRLCPY
153 ZFS_AC_KERNEL_SRC_STRSCPY
154 ZFS_AC_KERNEL_SRC_PAGEMAP_FOLIO_WAIT_BIT
155 ZFS_AC_KERNEL_SRC_ADD_DISK
156 ZFS_AC_KERNEL_SRC_KTHREAD
157 ZFS_AC_KERNEL_SRC_ZERO_PAGE
158 ZFS_AC_KERNEL_SRC___COPY_FROM_USER_INATOMIC
159 ZFS_AC_KERNEL_SRC_USER_NS_COMMON_INUM
160 ZFS_AC_KERNEL_SRC_IDMAP_MNT_API
161 ZFS_AC_KERNEL_SRC_IDMAP_NO_USERNS
162 ZFS_AC_KERNEL_SRC_IATTR_VFSID
163 ZFS_AC_KERNEL_SRC_FILEMAP
164 ZFS_AC_KERNEL_SRC_WRITEPAGE_T
165 ZFS_AC_KERNEL_SRC_RECLAIMED
166 ZFS_AC_KERNEL_SRC_REGISTER_SYSCTL_TABLE
167 ZFS_AC_KERNEL_SRC_COPY_SPLICE_READ
168 ZFS_AC_KERNEL_SRC_SYNC_BDEV
171 ZFS_AC_KERNEL_SRC_CPU_HAS_FEATURE
172 ZFS_AC_KERNEL_SRC_FLUSH_DCACHE_PAGE
175 ZFS_AC_KERNEL_SRC_FLUSH_DCACHE_PAGE
179 AC_MSG_CHECKING([for available kernel interfaces])
180 ZFS_LINUX_TEST_COMPILE_ALL([kabi])
181 AC_MSG_RESULT([done])
185 dnl # Check results of kernel interface tests.
187 AC_DEFUN([ZFS_AC_KERNEL_TEST_RESULT], [
188 ZFS_AC_KERNEL_ACCESS_OK_TYPE
189 ZFS_AC_KERNEL_GLOBAL_PAGE_STATE
190 ZFS_AC_KERNEL_OBJTOOL
191 ZFS_AC_KERNEL_PDE_DATA
192 ZFS_AC_KERNEL_FALLOCATE
193 ZFS_AC_KERNEL_FADVISE
194 ZFS_AC_KERNEL_GENERIC_FADVISE
195 ZFS_AC_KERNEL_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE
198 ZFS_AC_KERNEL_USLEEP_RANGE
199 ZFS_AC_KERNEL_KMEM_CACHE
200 ZFS_AC_KERNEL_KVMALLOC
201 ZFS_AC_KERNEL_VMALLOC_PAGE_KERNEL
203 ZFS_AC_KERNEL_INODE_TIMES
204 ZFS_AC_KERNEL_INODE_LOCK
205 ZFS_AC_KERNEL_GROUP_INFO_GID
207 ZFS_AC_KERNEL_TIMER_SETUP
208 ZFS_AC_KERNEL_SUPER_USER_NS
209 ZFS_AC_KERNEL_PROC_OPERATIONS
210 ZFS_AC_KERNEL_BLOCK_DEVICE_OPERATIONS
213 ZFS_AC_KERNEL_BLK_QUEUE
214 ZFS_AC_KERNEL_GENHD_FLAGS
215 ZFS_AC_KERNEL_REVALIDATE_DISK
216 ZFS_AC_KERNEL_GET_DISK_RO
217 ZFS_AC_KERNEL_GENERIC_READLINK_GLOBAL
218 ZFS_AC_KERNEL_DISCARD_GRANULARITY
219 ZFS_AC_KERNEL_INODE_OWNER_OR_CAPABLE
222 ZFS_AC_KERNEL_INODE_SETATTR
223 ZFS_AC_KERNEL_INODE_GETATTR
224 ZFS_AC_KERNEL_INODE_SET_FLAGS
225 ZFS_AC_KERNEL_INODE_SET_IVERSION
226 ZFS_AC_KERNEL_SHOW_OPTIONS
227 ZFS_AC_KERNEL_FILE_INODE
228 ZFS_AC_KERNEL_FILE_DENTRY
230 ZFS_AC_KERNEL_AIO_FSYNC
231 ZFS_AC_KERNEL_EVICT_INODE
232 ZFS_AC_KERNEL_DIRTY_INODE
233 ZFS_AC_KERNEL_SHRINKER
235 ZFS_AC_KERNEL_LOOKUP_FLAGS
237 ZFS_AC_KERNEL_PERMISSION
238 ZFS_AC_KERNEL_GET_LINK
239 ZFS_AC_KERNEL_PUT_LINK
240 ZFS_AC_KERNEL_TMPFILE
241 ZFS_AC_KERNEL_AUTOMOUNT
242 ZFS_AC_KERNEL_ENCODE_FH_WITH_INODE
243 ZFS_AC_KERNEL_COMMIT_METADATA
244 ZFS_AC_KERNEL_CLEAR_INODE
245 ZFS_AC_KERNEL_SETATTR_PREPARE
246 ZFS_AC_KERNEL_INSERT_INODE_LOCKED
248 ZFS_AC_KERNEL_DENTRY_ALIAS_D_U
249 ZFS_AC_KERNEL_TRUNCATE_SETSIZE
250 ZFS_AC_KERNEL_SECURITY_INODE
251 ZFS_AC_KERNEL_FST_MOUNT
253 ZFS_AC_KERNEL_SET_NLINK
255 ZFS_AC_KERNEL_LSEEK_EXECUTE
256 ZFS_AC_KERNEL_VFS_FILEMAP_DIRTY_FOLIO
257 ZFS_AC_KERNEL_VFS_READ_FOLIO
258 ZFS_AC_KERNEL_VFS_GETATTR
259 ZFS_AC_KERNEL_VFS_FSYNC_2ARGS
260 ZFS_AC_KERNEL_VFS_ITERATE
261 ZFS_AC_KERNEL_VFS_DIRECT_IO
262 ZFS_AC_KERNEL_VFS_READPAGES
263 ZFS_AC_KERNEL_VFS_SET_PAGE_DIRTY_NOBUFFERS
264 ZFS_AC_KERNEL_VFS_RW_ITERATE
265 ZFS_AC_KERNEL_VFS_GENERIC_WRITE_CHECKS
266 ZFS_AC_KERNEL_VFS_IOV_ITER
267 ZFS_AC_KERNEL_VFS_COPY_FILE_RANGE
268 ZFS_AC_KERNEL_VFS_GENERIC_COPY_FILE_RANGE
269 ZFS_AC_KERNEL_VFS_REMAP_FILE_RANGE
270 ZFS_AC_KERNEL_VFS_CLONE_FILE_RANGE
271 ZFS_AC_KERNEL_VFS_DEDUPE_FILE_RANGE
272 ZFS_AC_KERNEL_VFS_FILE_OPERATIONS_EXTEND
273 ZFS_AC_KERNEL_KMAP_ATOMIC_ARGS
274 ZFS_AC_KERNEL_FOLLOW_DOWN_ONE
275 ZFS_AC_KERNEL_MAKE_REQUEST_FN
276 ZFS_AC_KERNEL_GENERIC_IO_ACCT
278 ZFS_AC_KERNEL_FMODE_T
279 ZFS_AC_KERNEL_KUIDGID_T
280 ZFS_AC_KERNEL_KUID_HELPERS
282 ZFS_AC_KERNEL_CURRENT_TIME
283 ZFS_AC_KERNEL_USERNS_CAPABILITIES
284 ZFS_AC_KERNEL_IN_COMPAT_SYSCALL
286 ZFS_AC_KERNEL_TOTALRAM_PAGES_FUNC
287 ZFS_AC_KERNEL_TOTALHIGH_PAGES
288 ZFS_AC_KERNEL_KSTRTOUL
290 ZFS_AC_KERNEL_CPU_HOTPLUG
291 ZFS_AC_KERNEL_GENERIC_FILLATTR
293 ZFS_AC_KERNEL_SYMLINK
294 ZFS_AC_KERNEL_BIO_MAX_SEGS
295 ZFS_AC_KERNEL_SIGNAL_STOP
296 ZFS_AC_KERNEL_SIGINFO
298 ZFS_AC_KERNEL_SET_SPECIAL_STATE
299 ZFS_AC_KERNEL_STANDALONE_LINUX_STDARG
300 ZFS_AC_KERNEL_STRLCPY
301 ZFS_AC_KERNEL_STRSCPY
302 ZFS_AC_KERNEL_PAGEMAP_FOLIO_WAIT_BIT
303 ZFS_AC_KERNEL_ADD_DISK
304 ZFS_AC_KERNEL_KTHREAD
305 ZFS_AC_KERNEL_ZERO_PAGE
306 ZFS_AC_KERNEL___COPY_FROM_USER_INATOMIC
307 ZFS_AC_KERNEL_USER_NS_COMMON_INUM
308 ZFS_AC_KERNEL_IDMAP_MNT_API
309 ZFS_AC_KERNEL_IDMAP_NO_USERNS
310 ZFS_AC_KERNEL_IATTR_VFSID
311 ZFS_AC_KERNEL_FILEMAP
312 ZFS_AC_KERNEL_WRITEPAGE_T
313 ZFS_AC_KERNEL_RECLAIMED
314 ZFS_AC_KERNEL_REGISTER_SYSCTL_TABLE
315 ZFS_AC_KERNEL_COPY_SPLICE_READ
316 ZFS_AC_KERNEL_SYNC_BDEV
319 ZFS_AC_KERNEL_CPU_HAS_FEATURE
320 ZFS_AC_KERNEL_FLUSH_DCACHE_PAGE
323 ZFS_AC_KERNEL_FLUSH_DCACHE_PAGE
329 dnl # Detect name used for Module.symvers file in kernel
331 AC_DEFUN([ZFS_AC_MODULE_SYMVERS], [
332 modpost=$LINUX/scripts/Makefile.modpost
333 AC_MSG_CHECKING([kernel file name for module symbols])
334 AS_IF([test "x$enable_linux_builtin" != xyes -a -f "$modpost"], [
335 AS_IF([grep -q Modules.symvers $modpost], [
336 LINUX_SYMBOLS=Modules.symvers
338 LINUX_SYMBOLS=Module.symvers
341 AS_IF([test ! -f "$LINUX_OBJ/$LINUX_SYMBOLS"], [
343 *** Please make sure the kernel devel package for your distribution
344 *** is installed. If you are building with a custom kernel, make sure
345 *** the kernel is configured, built, and the '--with-linux=PATH'
346 *** configure option refers to the location of the kernel source.
352 AC_MSG_RESULT($LINUX_SYMBOLS)
353 AC_SUBST(LINUX_SYMBOLS)
357 dnl # Detect the kernel to be built against
359 dnl # Most modern Linux distributions have separate locations for bare
360 dnl # source (source) and prebuilt (build) files. Additionally, there are
361 dnl # `source` and `build` symlinks in `/lib/modules/$(KERNEL_VERSION)`
362 dnl # pointing to them. The directory search order is now:
364 dnl # - `configure` command line values if both `--with-linux` and
365 dnl # `--with-linux-obj` were defined
367 dnl # - If only `--with-linux` was defined, `--with-linux-obj` is assumed
368 dnl # to have the same value as `--with-linux`
370 dnl # - If neither `--with-linux` nor `--with-linux-obj` were defined
371 dnl # autodetection is used:
373 dnl # - `/lib/modules/$(uname -r)/{source,build}` respectively, if exist.
375 dnl # - If only `/lib/modules/$(uname -r)/build` exists, it is assumed
376 dnl # to be both source and build directory.
378 dnl # - The first directory in `/lib/modules` with the highest version
379 dnl # number according to `sort -V` which contains both `source` and
380 dnl # `build` symlinks/directories. If module directory contains only
381 dnl # `build` component, it is assumed to be both source and build
384 dnl # - Last resort: the first directory matching `/usr/src/kernels/*`
385 dnl # and `/usr/src/linux-*` with the highest version number according
386 dnl # to `sort -V` is assumed to be both source and build directory.
388 AC_DEFUN([ZFS_AC_KERNEL], [
390 AS_HELP_STRING([--with-linux=PATH],
391 [Path to kernel source]),
392 [kernelsrc="$withval"])
394 AC_ARG_WITH(linux-obj,
395 AS_HELP_STRING([--with-linux-obj=PATH],
396 [Path to kernel build objects]),
397 [kernelbuild="$withval"])
399 AC_MSG_CHECKING([kernel source and build directories])
400 AS_IF([test -n "$kernelsrc" && test -z "$kernelbuild"], [
401 kernelbuild="$kernelsrc"
402 ], [test -z "$kernelsrc"], [
403 AS_IF([test -e "/lib/modules/$(uname -r)/source" && \
404 test -e "/lib/modules/$(uname -r)/build"], [
405 src="/lib/modules/$(uname -r)/source"
406 build="/lib/modules/$(uname -r)/build"
407 ], [test -e "/lib/modules/$(uname -r)/build"], [
408 build="/lib/modules/$(uname -r)/build"
413 for d in $(ls -1d /lib/modules/* 2>/dev/null | sort -Vr); do
414 if test -e "$d/source" && test -e "$d/build"; then
420 if test -e "$d/build"; then
427 # the least reliable method
428 if test -z "$src"; then
429 src=$(ls -1d /usr/src/kernels/* /usr/src/linux-* \
430 2>/dev/null | grep -v obj | sort -Vr | head -1)
435 AS_IF([test -n "$src" && test -e "$src"], [
436 kernelsrc=$(readlink -e "$src")
438 kernelsrc="[Not found]"
440 AS_IF([test -n "$build" && test -e "$build"], [
441 kernelbuild=$(readlink -e "$build")
443 kernelbuild="[Not found]"
446 AS_IF([test "$kernelsrc" = "NONE"], [
452 AC_MSG_RESULT([done])
453 AC_MSG_CHECKING([kernel source directory])
454 AC_MSG_RESULT([$kernelsrc])
455 AC_MSG_CHECKING([kernel build directory])
456 AC_MSG_RESULT([$kernelbuild])
457 AS_IF([test ! -d "$kernelsrc" || test ! -d "$kernelbuild"], [
459 *** Please make sure the kernel devel package for your distribution
460 *** is installed and then try again. If that fails, you can specify the
461 *** location of the kernel source and build with the '--with-linux=PATH' and
462 *** '--with-linux-obj=PATH' options respectively.])
465 AC_MSG_CHECKING([kernel source version])
466 utsrelease1=$kernelbuild/include/linux/version.h
467 utsrelease2=$kernelbuild/include/linux/utsrelease.h
468 utsrelease3=$kernelbuild/include/generated/utsrelease.h
469 AS_IF([test -r $utsrelease1 && grep -qF UTS_RELEASE $utsrelease1], [
470 utsrelease=$utsrelease1
471 ], [test -r $utsrelease2 && grep -qF UTS_RELEASE $utsrelease2], [
472 utsrelease=$utsrelease2
473 ], [test -r $utsrelease3 && grep -qF UTS_RELEASE $utsrelease3], [
474 utsrelease=$utsrelease3
477 AS_IF([test -n "$utsrelease"], [
478 kernsrcver=$($AWK '/UTS_RELEASE/ { gsub(/"/, "", $[3]); print $[3] }' $utsrelease)
479 AS_IF([test -z "$kernsrcver"], [
480 AC_MSG_RESULT([Not found])
482 *** Cannot determine kernel version.
486 AC_MSG_RESULT([Not found])
487 if test "x$enable_linux_builtin" != xyes; then
489 *** Cannot find UTS_RELEASE definition.
493 *** Cannot find UTS_RELEASE definition.
494 *** Please run 'make prepare' inside the kernel source tree.])
498 AC_MSG_RESULT([$kernsrcver])
500 AS_VERSION_COMPARE([$kernsrcver], [$ZFS_META_KVER_MIN], [
502 *** Cannot build against kernel version $kernsrcver.
503 *** The minimum supported kernel version is $ZFS_META_KVER_MIN.
508 LINUX_OBJ=${kernelbuild}
509 LINUX_VERSION=${kernsrcver}
513 AC_SUBST(LINUX_VERSION)
517 dnl # Detect the QAT module to be built against, QAT provides hardware
518 dnl # acceleration for data compression:
520 dnl # https://01.org/intel-quickassist-technology
522 dnl # 1) Download and install QAT driver from the above link
523 dnl # 2) Start QAT driver in your system:
524 dnl # service qat_service start
525 dnl # 3) Enable QAT in ZFS, e.g.:
526 dnl # ./configure --with-qat=<qat-driver-path>/QAT1.6
528 dnl # 4) Set GZIP compression in ZFS dataset:
529 dnl # zfs set compression = gzip <dataset>
531 dnl # Then the data written to this ZFS pool is compressed by QAT accelerator
532 dnl # automatically, and de-compressed by QAT when read from the pool.
534 dnl # 1) Get QAT hardware statistics with:
535 dnl # cat /proc/icp_dh895xcc_dev/qat
536 dnl # 2) To disable QAT:
537 dnl # insmod zfs.ko zfs_qat_disable=1
539 AC_DEFUN([ZFS_AC_QAT], [
541 AS_HELP_STRING([--with-qat=PATH],
542 [Path to qat source]),
543 AS_IF([test "$withval" = "yes"],
544 AC_MSG_ERROR([--with-qat=PATH requires a PATH]),
545 [qatsrc="$withval"]))
547 AC_ARG_WITH([qat-obj],
548 AS_HELP_STRING([--with-qat-obj=PATH],
549 [Path to qat build objects]),
550 [qatbuild="$withval"])
552 AS_IF([test ! -z "${qatsrc}"], [
553 AC_MSG_CHECKING([qat source directory])
554 AC_MSG_RESULT([$qatsrc])
555 QAT_SRC="${qatsrc}/quickassist"
556 AS_IF([ test ! -e "$QAT_SRC/include/cpa.h"], [
558 *** Please make sure the qat driver package is installed
559 *** and specify the location of the qat source with the
560 *** '--with-qat=PATH' option then try again. Failed to
566 AS_IF([test ! -z "${qatsrc}"], [
567 AC_MSG_CHECKING([qat build directory])
568 AS_IF([test -z "$qatbuild"], [
569 qatbuild="${qatsrc}/build"
572 AC_MSG_RESULT([$qatbuild])
574 AS_IF([ ! test -e "$QAT_OBJ/icp_qa_al.ko" && ! test -e "$QAT_OBJ/qat_api.ko"], [
576 *** Please make sure the qat driver is installed then try again.
577 *** Failed to find icp_qa_al.ko or qat_api.ko in:
584 AC_DEFINE(HAVE_QAT, 1,
585 [qat is enabled and existed])
589 dnl # Detect the name used for the QAT Module.symvers file.
591 AS_IF([test ! -z "${qatsrc}"], [
592 AC_MSG_CHECKING([qat file for module symbols])
593 QAT_SYMBOLS=$QAT_SRC/lookaside/access_layer/src/Module.symvers
595 AS_IF([test -r $QAT_SYMBOLS], [
596 AC_MSG_RESULT([$QAT_SYMBOLS])
597 AC_SUBST(QAT_SYMBOLS)
600 *** Please make sure the qat driver is installed then try again.
601 *** Failed to find Module.symvers in:
609 dnl # ZFS_LINUX_CONFTEST_H
611 AC_DEFUN([ZFS_LINUX_CONFTEST_H], [
612 test -d build/$2 || mkdir -p build/$2
613 cat - <<_ACEOF >build/$2/$2.h
619 dnl # ZFS_LINUX_CONFTEST_C
621 AC_DEFUN([ZFS_LINUX_CONFTEST_C], [
622 test -d build/$2 || mkdir -p build/$2
623 cat confdefs.h - <<_ACEOF >build/$2/$2.c
629 dnl # ZFS_LINUX_CONFTEST_MAKEFILE
631 dnl # $1 - test case name
632 dnl # $2 - add to top-level Makefile
633 dnl # $3 - additional build flags
635 AC_DEFUN([ZFS_LINUX_CONFTEST_MAKEFILE], [
636 test -d build || mkdir -p build
637 test -d build/$1 || mkdir -p build/$1
639 file=build/$1/Makefile
641 dnl # Example command line to manually build source.
642 cat - <<_ACEOF >$file
643 # Example command line to manually build source
644 # make modules -C $LINUX_OBJ $ARCH_UM M=$PWD/build/$1
646 ccflags-y := -Werror $FRAME_LARGER_THAN
649 dnl # Additional custom CFLAGS as requested.
650 m4_ifval($3, [echo "ccflags-y += $3" >>$file], [])
652 dnl # Test case source
653 echo "obj-m := $1.o" >>$file
655 AS_IF([test "x$2" = "xyes"], [echo "obj-m += $1/" >>build/Makefile], [])
659 dnl # ZFS_LINUX_TEST_PROGRAM(C)([PROLOGUE], [BODY])
661 m4_define([ZFS_LINUX_TEST_PROGRAM], [
662 #include <linux/module.h>
673 MODULE_DESCRIPTION("conftest");
674 MODULE_AUTHOR(ZFS_META_AUTHOR);
675 MODULE_VERSION(ZFS_META_VERSION "-" ZFS_META_RELEASE);
680 dnl # ZFS_LINUX_TEST_REMOVE
682 dnl # Removes the specified test source and results.
684 AC_DEFUN([ZFS_LINUX_TEST_REMOVE], [
685 test -d build/$1 && rm -Rf build/$1
686 test -f build/Makefile && sed '/$1/d' build/Makefile
690 dnl # ZFS_LINUX_COMPILE
693 dnl # $2 - test command
694 dnl # $3 - pass command
695 dnl # $4 - fail command
696 dnl # $5 - set KBUILD_MODPOST_NOFINAL='yes'
697 dnl # $6 - set KBUILD_MODPOST_WARN='yes'
699 dnl # Used internally by ZFS_LINUX_TEST_{COMPILE,MODPOST}
701 AC_DEFUN([ZFS_LINUX_COMPILE], [
702 AC_ARG_VAR([KERNEL_CC], [C compiler for
703 building kernel modules])
704 AC_ARG_VAR([KERNEL_LD], [Linker for
705 building kernel modules])
706 AC_ARG_VAR([KERNEL_LLVM], [Binary option to
707 build kernel modules with LLVM/CLANG toolchain])
709 KBUILD_MODPOST_NOFINAL="$5" KBUILD_MODPOST_WARN="$6"
710 make modules -k -j$TEST_JOBS ${KERNEL_CC:+CC=$KERNEL_CC}
711 ${KERNEL_LD:+LD=$KERNEL_LD} ${KERNEL_LLVM:+LLVM=$KERNEL_LLVM}
712 CONFIG_MODULES=y CFLAGS_MODULE=-DCONFIG_MODULES
713 -C $LINUX_OBJ $ARCH_UM M=$PWD/$1 >$1/build.log 2>&1])
714 AS_IF([AC_TRY_COMMAND([$2])], [$3], [$4])
718 dnl # ZFS_LINUX_TEST_COMPILE
720 dnl # Perform a full compile excluding the final modpost phase.
722 AC_DEFUN([ZFS_LINUX_TEST_COMPILE], [
723 ZFS_LINUX_COMPILE([$2], [test -f $2/build.log], [
724 mv $2/Makefile $2/Makefile.compile.$1
725 mv $2/build.log $2/build.log.$1
728 *** Unable to compile test source to determine kernel interfaces.])
733 dnl # ZFS_LINUX_TEST_MODPOST
735 dnl # Perform a full compile including the modpost phase. This may
736 dnl # be an incremental build if the objects have already been built.
738 AC_DEFUN([ZFS_LINUX_TEST_MODPOST], [
739 ZFS_LINUX_COMPILE([$2], [test -f $2/build.log], [
740 mv $2/Makefile $2/Makefile.modpost.$1
741 cat $2/build.log >>build/build.log.$1
744 *** Unable to modpost test source to determine kernel interfaces.])
749 dnl # Perform the compilation of the test cases in two phases.
751 dnl # Phase 1) attempt to build the object files for all of the tests
752 dnl # defined by the ZFS_LINUX_TEST_SRC macro. But do not
753 dnl # perform the final modpost stage.
755 dnl # Phase 2) disable all tests which failed the initial compilation,
756 dnl # then invoke the final modpost step for the remaining tests.
758 dnl # This allows us efficiently build the test cases in parallel while
759 dnl # remaining resilient to build failures which are expected when
760 dnl # detecting the available kernel interfaces.
762 dnl # The maximum allowed parallelism can be controlled by setting the
763 dnl # TEST_JOBS environment variable. Otherwise, it default to $(nproc).
765 AC_DEFUN([ZFS_LINUX_TEST_COMPILE_ALL], [
766 dnl # Phase 1 - Compilation only, final linking is skipped.
767 ZFS_LINUX_TEST_COMPILE([$1], [build])
770 dnl # Phase 2 - When building external modules disable test cases
771 dnl # which failed to compile and invoke modpost to verify the
774 dnl # Test names suffixed with '_license' call modpost independently
775 dnl # to ensure that a single incompatibility does not result in the
776 dnl # modpost phase exiting early. This check is not performed on
777 dnl # every symbol since the majority are compatible and doing so
778 dnl # would significantly slow down this phase.
780 dnl # When configuring for builtin (--enable-linux-builtin)
781 dnl # fake the linking step artificially create the expected .ko
782 dnl # files for tests which did compile. This is required for
783 dnl # kernels which do not have loadable module support or have
784 dnl # not yet been built.
786 AS_IF([test "x$enable_linux_builtin" = "xno"], [
787 for dir in $(awk '/^obj-m/ { print [$]3 }' \
788 build/Makefile.compile.$1); do
790 AS_IF([test -f build/$name/$name.o], [
791 AS_IF([test "${name##*_}" = "license"], [
792 ZFS_LINUX_TEST_MODPOST([$1],
794 echo "obj-n += $dir" >>build/Makefile
796 echo "obj-m += $dir" >>build/Makefile
799 echo "obj-n += $dir" >>build/Makefile
803 ZFS_LINUX_TEST_MODPOST([$1], [build])
805 for dir in $(awk '/^obj-m/ { print [$]3 }' \
806 build/Makefile.compile.$1); do
808 AS_IF([test -f build/$name/$name.o], [
809 touch build/$name/$name.ko
816 dnl # ZFS_LINUX_TEST_SRC
821 dnl # $4 - extra cflags
822 dnl # $5 - check license-compatibility
824 dnl # Check if the test source is buildable at all and then if it is
825 dnl # license compatible.
827 dnl # N.B because all of the test cases are compiled in parallel they
828 dnl # must never depend on the results of previous tests. Each test
829 dnl # needs to be entirely independent.
831 AC_DEFUN([ZFS_LINUX_TEST_SRC], [
832 ZFS_LINUX_CONFTEST_C([ZFS_LINUX_TEST_PROGRAM([[$2]], [[$3]],
833 [["Dual BSD/GPL"]])], [$1])
834 ZFS_LINUX_CONFTEST_MAKEFILE([$1], [yes], [$4])
836 AS_IF([ test -n "$5" ], [
837 ZFS_LINUX_CONFTEST_C([ZFS_LINUX_TEST_PROGRAM(
838 [[$2]], [[$3]], [[$5]])], [$1_license])
839 ZFS_LINUX_CONFTEST_MAKEFILE([$1_license], [yes], [$4])
844 dnl # ZFS_LINUX_TEST_RESULT
846 dnl # $1 - name of a test source (ZFS_LINUX_TEST_SRC)
847 dnl # $2 - run on success (valid .ko generated)
848 dnl # $3 - run on failure (unable to compile)
850 AC_DEFUN([ZFS_LINUX_TEST_RESULT], [
851 AS_IF([test -d build/$1], [
852 AS_IF([test -f build/$1/$1.ko], [$2], [$3])
855 *** No matching source for the "$1" test, check that
856 *** both the test source and result macros refer to the same name.
862 dnl # ZFS_LINUX_TEST_ERROR
864 dnl # Generic error message which can be used when none of the expected
865 dnl # kernel interfaces were detected.
867 AC_DEFUN([ZFS_LINUX_TEST_ERROR], [
869 *** None of the expected "$1" interfaces were detected.
870 *** This may be because your kernel version is newer than what is
871 *** supported, or you are using a patched custom kernel with
872 *** incompatible modifications.
874 *** ZFS Version: $ZFS_META_ALIAS
875 *** Compatible Kernels: $ZFS_META_KVER_MIN - $ZFS_META_KVER_MAX
880 dnl # ZFS_LINUX_TEST_RESULT_SYMBOL
882 dnl # Like ZFS_LINUX_TEST_RESULT except ZFS_CHECK_SYMBOL_EXPORT is called to
883 dnl # verify symbol exports, unless --enable-linux-builtin was provided to
886 AC_DEFUN([ZFS_LINUX_TEST_RESULT_SYMBOL], [
887 AS_IF([ ! test -f build/$1/$1.ko], [
890 AS_IF([test "x$enable_linux_builtin" != "xyes"], [
891 ZFS_CHECK_SYMBOL_EXPORT([$2], [$3], [$4], [$5])
899 dnl # ZFS_LINUX_COMPILE_IFELSE
901 AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [
902 ZFS_LINUX_TEST_REMOVE([conftest])
904 m4_ifvaln([$1], [ZFS_LINUX_CONFTEST_C([$1], [conftest])])
905 m4_ifvaln([$5], [ZFS_LINUX_CONFTEST_H([$5], [conftest])],
906 [ZFS_LINUX_CONFTEST_H([], [conftest])])
908 ZFS_LINUX_CONFTEST_MAKEFILE([conftest], [no],
909 [m4_ifvaln([$5], [-I$PWD/build/conftest], [])])
910 ZFS_LINUX_COMPILE([build/conftest], [$2], [$3], [$4], [], [])
914 dnl # ZFS_LINUX_TRY_COMPILE
918 dnl # $3 - run on success (valid .ko generated)
919 dnl # $4 - run on failure (unable to compile)
921 dnl # When configuring as builtin (--enable-linux-builtin) for kernels
922 dnl # without loadable module support (CONFIG_MODULES=n) only the object
923 dnl # file is created. See ZFS_LINUX_TEST_COMPILE_ALL for details.
925 AC_DEFUN([ZFS_LINUX_TRY_COMPILE], [
926 AS_IF([test "x$enable_linux_builtin" = "xyes"], [
927 ZFS_LINUX_COMPILE_IFELSE(
928 [ZFS_LINUX_TEST_PROGRAM([[$1]], [[$2]],
929 [[ZFS_META_LICENSE]])],
930 [test -f build/conftest/conftest.o], [$3], [$4])
932 ZFS_LINUX_COMPILE_IFELSE(
933 [ZFS_LINUX_TEST_PROGRAM([[$1]], [[$2]],
934 [[ZFS_META_LICENSE]])],
935 [test -f build/conftest/conftest.ko], [$3], [$4])
940 dnl # ZFS_CHECK_SYMBOL_EXPORT
942 dnl # Check if a symbol is exported on not by consulting the symbols
943 dnl # file, or optionally the source code.
945 AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT], [
946 grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
947 $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
949 if test $rc -ne 0; then
952 grep -q -E "EXPORT_SYMBOL.*($1)" \
953 "$LINUX/$file" 2>/dev/null
955 if test $rc -eq 0; then
960 if test $export -eq 0; then :
971 dnl # ZFS_LINUX_TRY_COMPILE_SYMBOL
973 dnl # Like ZFS_LINUX_TRY_COMPILER except ZFS_CHECK_SYMBOL_EXPORT is called
974 dnl # to verify symbol exports, unless --enable-linux-builtin was provided
977 AC_DEFUN([ZFS_LINUX_TRY_COMPILE_SYMBOL], [
978 ZFS_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1])
979 if test $rc -ne 0; then :
982 if test "x$enable_linux_builtin" != xyes; then
983 ZFS_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1])
985 if test $rc -ne 0; then :
994 dnl # ZFS_LINUX_TRY_COMPILE_HEADER
995 dnl # like ZFS_LINUX_TRY_COMPILE, except the contents conftest.h are
996 dnl # provided via the fifth parameter
998 AC_DEFUN([ZFS_LINUX_TRY_COMPILE_HEADER], [
999 AS_IF([test "x$enable_linux_builtin" = "xyes"], [
1000 ZFS_LINUX_COMPILE_IFELSE(
1001 [ZFS_LINUX_TEST_PROGRAM([[$1]], [[$2]],
1002 [[ZFS_META_LICENSE]])],
1003 [test -f build/conftest/conftest.o], [$3], [$4], [$5])
1005 ZFS_LINUX_COMPILE_IFELSE(
1006 [ZFS_LINUX_TEST_PROGRAM([[$1]], [[$2]],
1007 [[ZFS_META_LICENSE]])],
1008 [test -f build/conftest/conftest.ko], [$3], [$4], [$5])
1013 dnl # AS_VERSION_COMPARE_LE
1014 dnl # like AS_VERSION_COMPARE_LE, but runs $3 if (and only if) $1 <= $2
1015 dnl # AS_VERSION_COMPARE_LE (version-1, version-2, [action-if-less-or-equal], [action-if-greater])
1017 AC_DEFUN([AS_VERSION_COMPARE_LE], [
1018 AS_VERSION_COMPARE([$1], [$2], [$3], [$3], [$4])
1022 dnl # ZFS_LINUX_REQUIRE_API
1023 dnl # like ZFS_LINUX_TEST_ERROR, except only fails if the kernel is
1024 dnl # at least some specified version.
1026 AC_DEFUN([ZFS_LINUX_REQUIRE_API], [
1027 AS_VERSION_COMPARE_LE([$2], [$kernsrcver], [
1029 *** None of the expected "$1" interfaces were detected. This
1030 *** interface is expected for kernels version "$2" and above.
1031 *** This may be because your kernel version is newer than what is
1032 *** supported, or you are using a patched custom kernel with
1033 *** incompatible modifications. Newer kernels may have incompatible
1036 *** ZFS Version: $ZFS_META_ALIAS
1037 *** Compatible Kernels: $ZFS_META_KVER_MIN - $ZFS_META_KVER_MAX