1dnl # 2dnl # Default ZFS kernel configuration 3dnl # 4AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [ 5 AM_COND_IF([BUILD_LINUX], [ 6 dnl # Setup the kernel build environment. 7 ZFS_AC_KERNEL 8 ZFS_AC_QAT 9 10 dnl # Sanity checks for module building and CONFIG_* defines 11 ZFS_AC_KERNEL_CONFIG_DEFINED 12 ZFS_AC_MODULE_SYMVERS 13 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 20 21 dnl # Parallel ZFS_LINUX_TEST_SRC / ZFS_LINUX_TEST_RESULT tests 22 ZFS_AC_KERNEL_TEST_SRC 23 ZFS_AC_KERNEL_TEST_RESULT 24 25 AS_IF([test "$LINUX_OBJ" != "$LINUX"], [ 26 KERNEL_MAKE="$KERNEL_MAKE O=$LINUX_OBJ" 27 ]) 28 29 AC_SUBST(KERNEL_MAKE) 30 ]) 31]) 32 33dnl # 34dnl # Generate and compile all of the kernel API test cases to determine 35dnl # which interfaces are available. By invoking the kernel build system 36dnl # only once the compilation can be done in parallel significantly 37dnl # speeding up the process. 38dnl # 39AC_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 58 ZFS_AC_KERNEL_SRC_RW 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 63 ZFS_AC_KERNEL_SRC_BIO 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 73 ZFS_AC_KERNEL_SRC_ACL 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_PAGEMAP_FOLIO_WAIT_BIT 153 ZFS_AC_KERNEL_SRC_ADD_DISK 154 ZFS_AC_KERNEL_SRC_KTHREAD 155 ZFS_AC_KERNEL_SRC_ZERO_PAGE 156 ZFS_AC_KERNEL_SRC___COPY_FROM_USER_INATOMIC 157 ZFS_AC_KERNEL_SRC_USER_NS_COMMON_INUM 158 ZFS_AC_KERNEL_SRC_IDMAP_MNT_API 159 ZFS_AC_KERNEL_SRC_IATTR_VFSID 160 ZFS_AC_KERNEL_SRC_FILEMAP 161 ZFS_AC_KERNEL_SRC_WRITEPAGE_T 162 ZFS_AC_KERNEL_SRC_RECLAIMED 163 ZFS_AC_KERNEL_SRC_REGISTER_SYSCTL_TABLE 164 ZFS_AC_KERNEL_SRC_COPY_SPLICE_READ 165 ZFS_AC_KERNEL_SRC_SYNC_BDEV 166 case "$host_cpu" in 167 powerpc*) 168 ZFS_AC_KERNEL_SRC_CPU_HAS_FEATURE 169 ZFS_AC_KERNEL_SRC_FLUSH_DCACHE_PAGE 170 ;; 171 riscv*) 172 ZFS_AC_KERNEL_SRC_FLUSH_DCACHE_PAGE 173 ;; 174 esac 175 176 AC_MSG_CHECKING([for available kernel interfaces]) 177 ZFS_LINUX_TEST_COMPILE_ALL([kabi]) 178 AC_MSG_RESULT([done]) 179]) 180 181dnl # 182dnl # Check results of kernel interface tests. 183dnl # 184AC_DEFUN([ZFS_AC_KERNEL_TEST_RESULT], [ 185 ZFS_AC_KERNEL_ACCESS_OK_TYPE 186 ZFS_AC_KERNEL_GLOBAL_PAGE_STATE 187 ZFS_AC_KERNEL_OBJTOOL 188 ZFS_AC_KERNEL_PDE_DATA 189 ZFS_AC_KERNEL_FALLOCATE 190 ZFS_AC_KERNEL_FADVISE 191 ZFS_AC_KERNEL_GENERIC_FADVISE 192 ZFS_AC_KERNEL_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE 193 ZFS_AC_KERNEL_RWSEM 194 ZFS_AC_KERNEL_SCHED 195 ZFS_AC_KERNEL_USLEEP_RANGE 196 ZFS_AC_KERNEL_KMEM_CACHE 197 ZFS_AC_KERNEL_KVMALLOC 198 ZFS_AC_KERNEL_VMALLOC_PAGE_KERNEL 199 ZFS_AC_KERNEL_WAIT 200 ZFS_AC_KERNEL_INODE_TIMES 201 ZFS_AC_KERNEL_INODE_LOCK 202 ZFS_AC_KERNEL_GROUP_INFO_GID 203 ZFS_AC_KERNEL_RW 204 ZFS_AC_KERNEL_TIMER_SETUP 205 ZFS_AC_KERNEL_SUPER_USER_NS 206 ZFS_AC_KERNEL_PROC_OPERATIONS 207 ZFS_AC_KERNEL_BLOCK_DEVICE_OPERATIONS 208 ZFS_AC_KERNEL_BIO 209 ZFS_AC_KERNEL_BLKDEV 210 ZFS_AC_KERNEL_BLK_QUEUE 211 ZFS_AC_KERNEL_GENHD_FLAGS 212 ZFS_AC_KERNEL_REVALIDATE_DISK 213 ZFS_AC_KERNEL_GET_DISK_RO 214 ZFS_AC_KERNEL_GENERIC_READLINK_GLOBAL 215 ZFS_AC_KERNEL_DISCARD_GRANULARITY 216 ZFS_AC_KERNEL_INODE_OWNER_OR_CAPABLE 217 ZFS_AC_KERNEL_XATTR 218 ZFS_AC_KERNEL_ACL 219 ZFS_AC_KERNEL_INODE_SETATTR 220 ZFS_AC_KERNEL_INODE_GETATTR 221 ZFS_AC_KERNEL_INODE_SET_FLAGS 222 ZFS_AC_KERNEL_INODE_SET_IVERSION 223 ZFS_AC_KERNEL_SHOW_OPTIONS 224 ZFS_AC_KERNEL_FILE_INODE 225 ZFS_AC_KERNEL_FILE_DENTRY 226 ZFS_AC_KERNEL_FSYNC 227 ZFS_AC_KERNEL_AIO_FSYNC 228 ZFS_AC_KERNEL_EVICT_INODE 229 ZFS_AC_KERNEL_DIRTY_INODE 230 ZFS_AC_KERNEL_SHRINKER 231 ZFS_AC_KERNEL_MKDIR 232 ZFS_AC_KERNEL_LOOKUP_FLAGS 233 ZFS_AC_KERNEL_CREATE 234 ZFS_AC_KERNEL_PERMISSION 235 ZFS_AC_KERNEL_GET_LINK 236 ZFS_AC_KERNEL_PUT_LINK 237 ZFS_AC_KERNEL_TMPFILE 238 ZFS_AC_KERNEL_AUTOMOUNT 239 ZFS_AC_KERNEL_ENCODE_FH_WITH_INODE 240 ZFS_AC_KERNEL_COMMIT_METADATA 241 ZFS_AC_KERNEL_CLEAR_INODE 242 ZFS_AC_KERNEL_SETATTR_PREPARE 243 ZFS_AC_KERNEL_INSERT_INODE_LOCKED 244 ZFS_AC_KERNEL_DENTRY 245 ZFS_AC_KERNEL_DENTRY_ALIAS_D_U 246 ZFS_AC_KERNEL_TRUNCATE_SETSIZE 247 ZFS_AC_KERNEL_SECURITY_INODE 248 ZFS_AC_KERNEL_FST_MOUNT 249 ZFS_AC_KERNEL_BDI 250 ZFS_AC_KERNEL_SET_NLINK 251 ZFS_AC_KERNEL_SGET 252 ZFS_AC_KERNEL_LSEEK_EXECUTE 253 ZFS_AC_KERNEL_VFS_FILEMAP_DIRTY_FOLIO 254 ZFS_AC_KERNEL_VFS_READ_FOLIO 255 ZFS_AC_KERNEL_VFS_GETATTR 256 ZFS_AC_KERNEL_VFS_FSYNC_2ARGS 257 ZFS_AC_KERNEL_VFS_ITERATE 258 ZFS_AC_KERNEL_VFS_DIRECT_IO 259 ZFS_AC_KERNEL_VFS_READPAGES 260 ZFS_AC_KERNEL_VFS_SET_PAGE_DIRTY_NOBUFFERS 261 ZFS_AC_KERNEL_VFS_RW_ITERATE 262 ZFS_AC_KERNEL_VFS_GENERIC_WRITE_CHECKS 263 ZFS_AC_KERNEL_VFS_IOV_ITER 264 ZFS_AC_KERNEL_VFS_COPY_FILE_RANGE 265 ZFS_AC_KERNEL_VFS_GENERIC_COPY_FILE_RANGE 266 ZFS_AC_KERNEL_VFS_REMAP_FILE_RANGE 267 ZFS_AC_KERNEL_VFS_CLONE_FILE_RANGE 268 ZFS_AC_KERNEL_VFS_DEDUPE_FILE_RANGE 269 ZFS_AC_KERNEL_VFS_FILE_OPERATIONS_EXTEND 270 ZFS_AC_KERNEL_KMAP_ATOMIC_ARGS 271 ZFS_AC_KERNEL_FOLLOW_DOWN_ONE 272 ZFS_AC_KERNEL_MAKE_REQUEST_FN 273 ZFS_AC_KERNEL_GENERIC_IO_ACCT 274 ZFS_AC_KERNEL_FPU 275 ZFS_AC_KERNEL_FMODE_T 276 ZFS_AC_KERNEL_KUIDGID_T 277 ZFS_AC_KERNEL_KUID_HELPERS 278 ZFS_AC_KERNEL_RENAME 279 ZFS_AC_KERNEL_CURRENT_TIME 280 ZFS_AC_KERNEL_USERNS_CAPABILITIES 281 ZFS_AC_KERNEL_IN_COMPAT_SYSCALL 282 ZFS_AC_KERNEL_KTIME 283 ZFS_AC_KERNEL_TOTALRAM_PAGES_FUNC 284 ZFS_AC_KERNEL_TOTALHIGH_PAGES 285 ZFS_AC_KERNEL_KSTRTOUL 286 ZFS_AC_KERNEL_PERCPU 287 ZFS_AC_KERNEL_CPU_HOTPLUG 288 ZFS_AC_KERNEL_GENERIC_FILLATTR 289 ZFS_AC_KERNEL_MKNOD 290 ZFS_AC_KERNEL_SYMLINK 291 ZFS_AC_KERNEL_BIO_MAX_SEGS 292 ZFS_AC_KERNEL_SIGNAL_STOP 293 ZFS_AC_KERNEL_SIGINFO 294 ZFS_AC_KERNEL_SYSFS 295 ZFS_AC_KERNEL_SET_SPECIAL_STATE 296 ZFS_AC_KERNEL_STANDALONE_LINUX_STDARG 297 ZFS_AC_KERNEL_PAGEMAP_FOLIO_WAIT_BIT 298 ZFS_AC_KERNEL_ADD_DISK 299 ZFS_AC_KERNEL_KTHREAD 300 ZFS_AC_KERNEL_ZERO_PAGE 301 ZFS_AC_KERNEL___COPY_FROM_USER_INATOMIC 302 ZFS_AC_KERNEL_USER_NS_COMMON_INUM 303 ZFS_AC_KERNEL_IDMAP_MNT_API 304 ZFS_AC_KERNEL_IATTR_VFSID 305 ZFS_AC_KERNEL_FILEMAP 306 ZFS_AC_KERNEL_WRITEPAGE_T 307 ZFS_AC_KERNEL_RECLAIMED 308 ZFS_AC_KERNEL_REGISTER_SYSCTL_TABLE 309 ZFS_AC_KERNEL_COPY_SPLICE_READ 310 ZFS_AC_KERNEL_SYNC_BDEV 311 case "$host_cpu" in 312 powerpc*) 313 ZFS_AC_KERNEL_CPU_HAS_FEATURE 314 ZFS_AC_KERNEL_FLUSH_DCACHE_PAGE 315 ;; 316 riscv*) 317 ZFS_AC_KERNEL_FLUSH_DCACHE_PAGE 318 ;; 319 esac 320]) 321 322dnl # 323dnl # Detect name used for Module.symvers file in kernel 324dnl # 325AC_DEFUN([ZFS_AC_MODULE_SYMVERS], [ 326 modpost=$LINUX/scripts/Makefile.modpost 327 AC_MSG_CHECKING([kernel file name for module symbols]) 328 AS_IF([test "x$enable_linux_builtin" != xyes -a -f "$modpost"], [ 329 AS_IF([grep -q Modules.symvers $modpost], [ 330 LINUX_SYMBOLS=Modules.symvers 331 ], [ 332 LINUX_SYMBOLS=Module.symvers 333 ]) 334 335 AS_IF([test ! -f "$LINUX_OBJ/$LINUX_SYMBOLS"], [ 336 AC_MSG_ERROR([ 337 *** Please make sure the kernel devel package for your distribution 338 *** is installed. If you are building with a custom kernel, make sure 339 *** the kernel is configured, built, and the '--with-linux=PATH' 340 *** configure option refers to the location of the kernel source. 341 ]) 342 ]) 343 ], [ 344 LINUX_SYMBOLS=NONE 345 ]) 346 AC_MSG_RESULT($LINUX_SYMBOLS) 347 AC_SUBST(LINUX_SYMBOLS) 348]) 349 350dnl # 351dnl # Detect the kernel to be built against 352dnl # 353dnl # Most modern Linux distributions have separate locations for bare 354dnl # source (source) and prebuilt (build) files. Additionally, there are 355dnl # `source` and `build` symlinks in `/lib/modules/$(KERNEL_VERSION)` 356dnl # pointing to them. The directory search order is now: 357dnl # 358dnl # - `configure` command line values if both `--with-linux` and 359dnl # `--with-linux-obj` were defined 360dnl # 361dnl # - If only `--with-linux` was defined, `--with-linux-obj` is assumed 362dnl # to have the same value as `--with-linux` 363dnl # 364dnl # - If neither `--with-linux` nor `--with-linux-obj` were defined 365dnl # autodetection is used: 366dnl # 367dnl # - `/lib/modules/$(uname -r)/{source,build}` respectively, if exist. 368dnl # 369dnl # - If only `/lib/modules/$(uname -r)/build` exists, it is assumed 370dnl # to be both source and build directory. 371dnl # 372dnl # - The first directory in `/lib/modules` with the highest version 373dnl # number according to `sort -V` which contains both `source` and 374dnl # `build` symlinks/directories. If module directory contains only 375dnl # `build` component, it is assumed to be both source and build 376dnl # directory. 377dnl # 378dnl # - Last resort: the first directory matching `/usr/src/kernels/*` 379dnl # and `/usr/src/linux-*` with the highest version number according 380dnl # to `sort -V` is assumed to be both source and build directory. 381dnl # 382AC_DEFUN([ZFS_AC_KERNEL], [ 383 AC_ARG_WITH([linux], 384 AS_HELP_STRING([--with-linux=PATH], 385 [Path to kernel source]), 386 [kernelsrc="$withval"]) 387 388 AC_ARG_WITH(linux-obj, 389 AS_HELP_STRING([--with-linux-obj=PATH], 390 [Path to kernel build objects]), 391 [kernelbuild="$withval"]) 392 393 AC_MSG_CHECKING([kernel source and build directories]) 394 AS_IF([test -n "$kernelsrc" && test -z "$kernelbuild"], [ 395 kernelbuild="$kernelsrc" 396 ], [test -z "$kernelsrc"], [ 397 AS_IF([test -e "/lib/modules/$(uname -r)/source" && \ 398 test -e "/lib/modules/$(uname -r)/build"], [ 399 src="/lib/modules/$(uname -r)/source" 400 build="/lib/modules/$(uname -r)/build" 401 ], [test -e "/lib/modules/$(uname -r)/build"], [ 402 build="/lib/modules/$(uname -r)/build" 403 src="$build" 404 ], [ 405 src= 406 407 for d in $(ls -1d /lib/modules/* 2>/dev/null | sort -Vr); do 408 if test -e "$d/source" && test -e "$d/build"; then 409 src="$d/source" 410 build="$d/build" 411 break 412 fi 413 414 if test -e "$d/build"; then 415 src="$d/build" 416 build="$d/build" 417 break 418 fi 419 done 420 421 # the least reliable method 422 if test -z "$src"; then 423 src=$(ls -1d /usr/src/kernels/* /usr/src/linux-* \ 424 2>/dev/null | grep -v obj | sort -Vr | head -1) 425 build="$src" 426 fi 427 ]) 428 429 AS_IF([test -n "$src" && test -e "$src"], [ 430 kernelsrc=$(readlink -e "$src") 431 ], [ 432 kernelsrc="[Not found]" 433 ]) 434 AS_IF([test -n "$build" && test -e "$build"], [ 435 kernelbuild=$(readlink -e "$build") 436 ], [ 437 kernelbuild="[Not found]" 438 ]) 439 ], [ 440 AS_IF([test "$kernelsrc" = "NONE"], [ 441 kernsrcver=NONE 442 ]) 443 withlinux=yes 444 ]) 445 446 AC_MSG_RESULT([done]) 447 AC_MSG_CHECKING([kernel source directory]) 448 AC_MSG_RESULT([$kernelsrc]) 449 AC_MSG_CHECKING([kernel build directory]) 450 AC_MSG_RESULT([$kernelbuild]) 451 AS_IF([test ! -d "$kernelsrc" || test ! -d "$kernelbuild"], [ 452 AC_MSG_ERROR([ 453 *** Please make sure the kernel devel package for your distribution 454 *** is installed and then try again. If that fails, you can specify the 455 *** location of the kernel source and build with the '--with-linux=PATH' and 456 *** '--with-linux-obj=PATH' options respectively.]) 457 ]) 458 459 AC_MSG_CHECKING([kernel source version]) 460 utsrelease1=$kernelbuild/include/linux/version.h 461 utsrelease2=$kernelbuild/include/linux/utsrelease.h 462 utsrelease3=$kernelbuild/include/generated/utsrelease.h 463 AS_IF([test -r $utsrelease1 && grep -qF UTS_RELEASE $utsrelease1], [ 464 utsrelease=$utsrelease1 465 ], [test -r $utsrelease2 && grep -qF UTS_RELEASE $utsrelease2], [ 466 utsrelease=$utsrelease2 467 ], [test -r $utsrelease3 && grep -qF UTS_RELEASE $utsrelease3], [ 468 utsrelease=$utsrelease3 469 ]) 470 471 AS_IF([test -n "$utsrelease"], [ 472 kernsrcver=$($AWK '/UTS_RELEASE/ { gsub(/"/, "", $[3]); print $[3] }' $utsrelease) 473 AS_IF([test -z "$kernsrcver"], [ 474 AC_MSG_RESULT([Not found]) 475 AC_MSG_ERROR([ 476 *** Cannot determine kernel version. 477 ]) 478 ]) 479 ], [ 480 AC_MSG_RESULT([Not found]) 481 if test "x$enable_linux_builtin" != xyes; then 482 AC_MSG_ERROR([ 483 *** Cannot find UTS_RELEASE definition. 484 ]) 485 else 486 AC_MSG_ERROR([ 487 *** Cannot find UTS_RELEASE definition. 488 *** Please run 'make prepare' inside the kernel source tree.]) 489 fi 490 ]) 491 492 AC_MSG_RESULT([$kernsrcver]) 493 494 AS_VERSION_COMPARE([$kernsrcver], [$ZFS_META_KVER_MIN], [ 495 AC_MSG_ERROR([ 496 *** Cannot build against kernel version $kernsrcver. 497 *** The minimum supported kernel version is $ZFS_META_KVER_MIN. 498 ]) 499 ]) 500 501 LINUX=${kernelsrc} 502 LINUX_OBJ=${kernelbuild} 503 LINUX_VERSION=${kernsrcver} 504 505 AC_SUBST(LINUX) 506 AC_SUBST(LINUX_OBJ) 507 AC_SUBST(LINUX_VERSION) 508]) 509 510dnl # 511dnl # Detect the QAT module to be built against, QAT provides hardware 512dnl # acceleration for data compression: 513dnl # 514dnl # https://01.org/intel-quickassist-technology 515dnl # 516dnl # 1) Download and install QAT driver from the above link 517dnl # 2) Start QAT driver in your system: 518dnl # service qat_service start 519dnl # 3) Enable QAT in ZFS, e.g.: 520dnl # ./configure --with-qat=<qat-driver-path>/QAT1.6 521dnl # make 522dnl # 4) Set GZIP compression in ZFS dataset: 523dnl # zfs set compression = gzip <dataset> 524dnl # 525dnl # Then the data written to this ZFS pool is compressed by QAT accelerator 526dnl # automatically, and de-compressed by QAT when read from the pool. 527dnl # 528dnl # 1) Get QAT hardware statistics with: 529dnl # cat /proc/icp_dh895xcc_dev/qat 530dnl # 2) To disable QAT: 531dnl # insmod zfs.ko zfs_qat_disable=1 532dnl # 533AC_DEFUN([ZFS_AC_QAT], [ 534 AC_ARG_WITH([qat], 535 AS_HELP_STRING([--with-qat=PATH], 536 [Path to qat source]), 537 AS_IF([test "$withval" = "yes"], 538 AC_MSG_ERROR([--with-qat=PATH requires a PATH]), 539 [qatsrc="$withval"])) 540 541 AC_ARG_WITH([qat-obj], 542 AS_HELP_STRING([--with-qat-obj=PATH], 543 [Path to qat build objects]), 544 [qatbuild="$withval"]) 545 546 AS_IF([test ! -z "${qatsrc}"], [ 547 AC_MSG_CHECKING([qat source directory]) 548 AC_MSG_RESULT([$qatsrc]) 549 QAT_SRC="${qatsrc}/quickassist" 550 AS_IF([ test ! -e "$QAT_SRC/include/cpa.h"], [ 551 AC_MSG_ERROR([ 552 *** Please make sure the qat driver package is installed 553 *** and specify the location of the qat source with the 554 *** '--with-qat=PATH' option then try again. Failed to 555 *** find cpa.h in: 556 ${QAT_SRC}/include]) 557 ]) 558 ]) 559 560 AS_IF([test ! -z "${qatsrc}"], [ 561 AC_MSG_CHECKING([qat build directory]) 562 AS_IF([test -z "$qatbuild"], [ 563 qatbuild="${qatsrc}/build" 564 ]) 565 566 AC_MSG_RESULT([$qatbuild]) 567 QAT_OBJ=${qatbuild} 568 AS_IF([ ! test -e "$QAT_OBJ/icp_qa_al.ko" && ! test -e "$QAT_OBJ/qat_api.ko"], [ 569 AC_MSG_ERROR([ 570 *** Please make sure the qat driver is installed then try again. 571 *** Failed to find icp_qa_al.ko or qat_api.ko in: 572 $QAT_OBJ]) 573 ]) 574 575 AC_SUBST(QAT_SRC) 576 AC_SUBST(QAT_OBJ) 577 578 AC_DEFINE(HAVE_QAT, 1, 579 [qat is enabled and existed]) 580 ]) 581 582 dnl # 583 dnl # Detect the name used for the QAT Module.symvers file. 584 dnl # 585 AS_IF([test ! -z "${qatsrc}"], [ 586 AC_MSG_CHECKING([qat file for module symbols]) 587 QAT_SYMBOLS=$QAT_SRC/lookaside/access_layer/src/Module.symvers 588 589 AS_IF([test -r $QAT_SYMBOLS], [ 590 AC_MSG_RESULT([$QAT_SYMBOLS]) 591 AC_SUBST(QAT_SYMBOLS) 592 ],[ 593 AC_MSG_ERROR([ 594 *** Please make sure the qat driver is installed then try again. 595 *** Failed to find Module.symvers in: 596 $QAT_SYMBOLS 597 ]) 598 ]) 599 ]) 600]) 601 602dnl # 603dnl # ZFS_LINUX_CONFTEST_H 604dnl # 605AC_DEFUN([ZFS_LINUX_CONFTEST_H], [ 606test -d build/$2 || mkdir -p build/$2 607cat - <<_ACEOF >build/$2/$2.h 608$1 609_ACEOF 610]) 611 612dnl # 613dnl # ZFS_LINUX_CONFTEST_C 614dnl # 615AC_DEFUN([ZFS_LINUX_CONFTEST_C], [ 616test -d build/$2 || mkdir -p build/$2 617cat confdefs.h - <<_ACEOF >build/$2/$2.c 618$1 619_ACEOF 620]) 621 622dnl # 623dnl # ZFS_LINUX_CONFTEST_MAKEFILE 624dnl # 625dnl # $1 - test case name 626dnl # $2 - add to top-level Makefile 627dnl # $3 - additional build flags 628dnl # 629AC_DEFUN([ZFS_LINUX_CONFTEST_MAKEFILE], [ 630 test -d build || mkdir -p build 631 test -d build/$1 || mkdir -p build/$1 632 633 file=build/$1/Makefile 634 635 dnl # Example command line to manually build source. 636 cat - <<_ACEOF >$file 637# Example command line to manually build source 638# make modules -C $LINUX_OBJ $ARCH_UM M=$PWD/build/$1 639 640ccflags-y := -Werror $FRAME_LARGER_THAN 641_ACEOF 642 643 dnl # Additional custom CFLAGS as requested. 644 m4_ifval($3, [echo "ccflags-y += $3" >>$file], []) 645 646 dnl # Test case source 647 echo "obj-m := $1.o" >>$file 648 649 AS_IF([test "x$2" = "xyes"], [echo "obj-m += $1/" >>build/Makefile], []) 650]) 651 652dnl # 653dnl # ZFS_LINUX_TEST_PROGRAM(C)([PROLOGUE], [BODY]) 654dnl # 655m4_define([ZFS_LINUX_TEST_PROGRAM], [ 656#include <linux/module.h> 657$1 658 659int 660main (void) 661{ 662$2 663 ; 664 return 0; 665} 666 667MODULE_DESCRIPTION("conftest"); 668MODULE_AUTHOR(ZFS_META_AUTHOR); 669MODULE_VERSION(ZFS_META_VERSION "-" ZFS_META_RELEASE); 670MODULE_LICENSE($3); 671]) 672 673dnl # 674dnl # ZFS_LINUX_TEST_REMOVE 675dnl # 676dnl # Removes the specified test source and results. 677dnl # 678AC_DEFUN([ZFS_LINUX_TEST_REMOVE], [ 679 test -d build/$1 && rm -Rf build/$1 680 test -f build/Makefile && sed '/$1/d' build/Makefile 681]) 682 683dnl # 684dnl # ZFS_LINUX_COMPILE 685dnl # 686dnl # $1 - build dir 687dnl # $2 - test command 688dnl # $3 - pass command 689dnl # $4 - fail command 690dnl # $5 - set KBUILD_MODPOST_NOFINAL='yes' 691dnl # $6 - set KBUILD_MODPOST_WARN='yes' 692dnl # 693dnl # Used internally by ZFS_LINUX_TEST_{COMPILE,MODPOST} 694dnl # 695AC_DEFUN([ZFS_LINUX_COMPILE], [ 696 AC_ARG_VAR([KERNEL_CC], [C compiler for 697 building kernel modules]) 698 AC_ARG_VAR([KERNEL_LD], [Linker for 699 building kernel modules]) 700 AC_ARG_VAR([KERNEL_LLVM], [Binary option to 701 build kernel modules with LLVM/CLANG toolchain]) 702 AC_TRY_COMMAND([ 703 KBUILD_MODPOST_NOFINAL="$5" KBUILD_MODPOST_WARN="$6" 704 make modules -k -j$TEST_JOBS ${KERNEL_CC:+CC=$KERNEL_CC} 705 ${KERNEL_LD:+LD=$KERNEL_LD} ${KERNEL_LLVM:+LLVM=$KERNEL_LLVM} 706 CONFIG_MODULES=y CFLAGS_MODULE=-DCONFIG_MODULES 707 -C $LINUX_OBJ $ARCH_UM M=$PWD/$1 >$1/build.log 2>&1]) 708 AS_IF([AC_TRY_COMMAND([$2])], [$3], [$4]) 709]) 710 711dnl # 712dnl # ZFS_LINUX_TEST_COMPILE 713dnl # 714dnl # Perform a full compile excluding the final modpost phase. 715dnl # 716AC_DEFUN([ZFS_LINUX_TEST_COMPILE], [ 717 ZFS_LINUX_COMPILE([$2], [test -f $2/build.log], [ 718 mv $2/Makefile $2/Makefile.compile.$1 719 mv $2/build.log $2/build.log.$1 720 ],[ 721 AC_MSG_ERROR([ 722 *** Unable to compile test source to determine kernel interfaces.]) 723 ], [yes], []) 724]) 725 726dnl # 727dnl # ZFS_LINUX_TEST_MODPOST 728dnl # 729dnl # Perform a full compile including the modpost phase. This may 730dnl # be an incremental build if the objects have already been built. 731dnl # 732AC_DEFUN([ZFS_LINUX_TEST_MODPOST], [ 733 ZFS_LINUX_COMPILE([$2], [test -f $2/build.log], [ 734 mv $2/Makefile $2/Makefile.modpost.$1 735 cat $2/build.log >>build/build.log.$1 736 ],[ 737 AC_MSG_ERROR([ 738 *** Unable to modpost test source to determine kernel interfaces.]) 739 ], [], [yes]) 740]) 741 742dnl # 743dnl # Perform the compilation of the test cases in two phases. 744dnl # 745dnl # Phase 1) attempt to build the object files for all of the tests 746dnl # defined by the ZFS_LINUX_TEST_SRC macro. But do not 747dnl # perform the final modpost stage. 748dnl # 749dnl # Phase 2) disable all tests which failed the initial compilation, 750dnl # then invoke the final modpost step for the remaining tests. 751dnl # 752dnl # This allows us efficiently build the test cases in parallel while 753dnl # remaining resilient to build failures which are expected when 754dnl # detecting the available kernel interfaces. 755dnl # 756dnl # The maximum allowed parallelism can be controlled by setting the 757dnl # TEST_JOBS environment variable. Otherwise, it default to $(nproc). 758dnl # 759AC_DEFUN([ZFS_LINUX_TEST_COMPILE_ALL], [ 760 dnl # Phase 1 - Compilation only, final linking is skipped. 761 ZFS_LINUX_TEST_COMPILE([$1], [build]) 762 763 dnl # 764 dnl # Phase 2 - When building external modules disable test cases 765 dnl # which failed to compile and invoke modpost to verify the 766 dnl # final linking. 767 dnl # 768 dnl # Test names suffixed with '_license' call modpost independently 769 dnl # to ensure that a single incompatibility does not result in the 770 dnl # modpost phase exiting early. This check is not performed on 771 dnl # every symbol since the majority are compatible and doing so 772 dnl # would significantly slow down this phase. 773 dnl # 774 dnl # When configuring for builtin (--enable-linux-builtin) 775 dnl # fake the linking step artificially create the expected .ko 776 dnl # files for tests which did compile. This is required for 777 dnl # kernels which do not have loadable module support or have 778 dnl # not yet been built. 779 dnl # 780 AS_IF([test "x$enable_linux_builtin" = "xno"], [ 781 for dir in $(awk '/^obj-m/ { print [$]3 }' \ 782 build/Makefile.compile.$1); do 783 name=${dir%/} 784 AS_IF([test -f build/$name/$name.o], [ 785 AS_IF([test "${name##*_}" = "license"], [ 786 ZFS_LINUX_TEST_MODPOST([$1], 787 [build/$name]) 788 echo "obj-n += $dir" >>build/Makefile 789 ], [ 790 echo "obj-m += $dir" >>build/Makefile 791 ]) 792 ], [ 793 echo "obj-n += $dir" >>build/Makefile 794 ]) 795 done 796 797 ZFS_LINUX_TEST_MODPOST([$1], [build]) 798 ], [ 799 for dir in $(awk '/^obj-m/ { print [$]3 }' \ 800 build/Makefile.compile.$1); do 801 name=${dir%/} 802 AS_IF([test -f build/$name/$name.o], [ 803 touch build/$name/$name.ko 804 ]) 805 done 806 ]) 807]) 808 809dnl # 810dnl # ZFS_LINUX_TEST_SRC 811dnl # 812dnl # $1 - name 813dnl # $2 - global 814dnl # $3 - source 815dnl # $4 - extra cflags 816dnl # $5 - check license-compatibility 817dnl # 818dnl # Check if the test source is buildable at all and then if it is 819dnl # license compatible. 820dnl # 821dnl # N.B because all of the test cases are compiled in parallel they 822dnl # must never depend on the results of previous tests. Each test 823dnl # needs to be entirely independent. 824dnl # 825AC_DEFUN([ZFS_LINUX_TEST_SRC], [ 826 ZFS_LINUX_CONFTEST_C([ZFS_LINUX_TEST_PROGRAM([[$2]], [[$3]], 827 [["Dual BSD/GPL"]])], [$1]) 828 ZFS_LINUX_CONFTEST_MAKEFILE([$1], [yes], [$4]) 829 830 AS_IF([ test -n "$5" ], [ 831 ZFS_LINUX_CONFTEST_C([ZFS_LINUX_TEST_PROGRAM( 832 [[$2]], [[$3]], [[$5]])], [$1_license]) 833 ZFS_LINUX_CONFTEST_MAKEFILE([$1_license], [yes], [$4]) 834 ]) 835]) 836 837dnl # 838dnl # ZFS_LINUX_TEST_RESULT 839dnl # 840dnl # $1 - name of a test source (ZFS_LINUX_TEST_SRC) 841dnl # $2 - run on success (valid .ko generated) 842dnl # $3 - run on failure (unable to compile) 843dnl # 844AC_DEFUN([ZFS_LINUX_TEST_RESULT], [ 845 AS_IF([test -d build/$1], [ 846 AS_IF([test -f build/$1/$1.ko], [$2], [$3]) 847 ], [ 848 AC_MSG_ERROR([ 849 *** No matching source for the "$1" test, check that 850 *** both the test source and result macros refer to the same name. 851 ]) 852 ]) 853]) 854 855dnl # 856dnl # ZFS_LINUX_TEST_ERROR 857dnl # 858dnl # Generic error message which can be used when none of the expected 859dnl # kernel interfaces were detected. 860dnl # 861AC_DEFUN([ZFS_LINUX_TEST_ERROR], [ 862 AC_MSG_ERROR([ 863 *** None of the expected "$1" interfaces were detected. 864 *** This may be because your kernel version is newer than what is 865 *** supported, or you are using a patched custom kernel with 866 *** incompatible modifications. 867 *** 868 *** ZFS Version: $ZFS_META_ALIAS 869 *** Compatible Kernels: $ZFS_META_KVER_MIN - $ZFS_META_KVER_MAX 870 ]) 871]) 872 873dnl # 874dnl # ZFS_LINUX_TEST_RESULT_SYMBOL 875dnl # 876dnl # Like ZFS_LINUX_TEST_RESULT except ZFS_CHECK_SYMBOL_EXPORT is called to 877dnl # verify symbol exports, unless --enable-linux-builtin was provided to 878dnl # configure. 879dnl # 880AC_DEFUN([ZFS_LINUX_TEST_RESULT_SYMBOL], [ 881 AS_IF([ ! test -f build/$1/$1.ko], [ 882 $5 883 ], [ 884 AS_IF([test "x$enable_linux_builtin" != "xyes"], [ 885 ZFS_CHECK_SYMBOL_EXPORT([$2], [$3], [$4], [$5]) 886 ], [ 887 $4 888 ]) 889 ]) 890]) 891 892dnl # 893dnl # ZFS_LINUX_COMPILE_IFELSE 894dnl # 895AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [ 896 ZFS_LINUX_TEST_REMOVE([conftest]) 897 898 m4_ifvaln([$1], [ZFS_LINUX_CONFTEST_C([$1], [conftest])]) 899 m4_ifvaln([$5], [ZFS_LINUX_CONFTEST_H([$5], [conftest])], 900 [ZFS_LINUX_CONFTEST_H([], [conftest])]) 901 902 ZFS_LINUX_CONFTEST_MAKEFILE([conftest], [no], 903 [m4_ifvaln([$5], [-I$PWD/build/conftest], [])]) 904 ZFS_LINUX_COMPILE([build/conftest], [$2], [$3], [$4], [], []) 905]) 906 907dnl # 908dnl # ZFS_LINUX_TRY_COMPILE 909dnl # 910dnl # $1 - global 911dnl # $2 - source 912dnl # $3 - run on success (valid .ko generated) 913dnl # $4 - run on failure (unable to compile) 914dnl # 915dnl # When configuring as builtin (--enable-linux-builtin) for kernels 916dnl # without loadable module support (CONFIG_MODULES=n) only the object 917dnl # file is created. See ZFS_LINUX_TEST_COMPILE_ALL for details. 918dnl # 919AC_DEFUN([ZFS_LINUX_TRY_COMPILE], [ 920 AS_IF([test "x$enable_linux_builtin" = "xyes"], [ 921 ZFS_LINUX_COMPILE_IFELSE( 922 [ZFS_LINUX_TEST_PROGRAM([[$1]], [[$2]], 923 [[ZFS_META_LICENSE]])], 924 [test -f build/conftest/conftest.o], [$3], [$4]) 925 ], [ 926 ZFS_LINUX_COMPILE_IFELSE( 927 [ZFS_LINUX_TEST_PROGRAM([[$1]], [[$2]], 928 [[ZFS_META_LICENSE]])], 929 [test -f build/conftest/conftest.ko], [$3], [$4]) 930 ]) 931]) 932 933dnl # 934dnl # ZFS_CHECK_SYMBOL_EXPORT 935dnl # 936dnl # Check if a symbol is exported on not by consulting the symbols 937dnl # file, or optionally the source code. 938dnl # 939AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT], [ 940 grep -q -E '[[[:space:]]]$1[[[:space:]]]' \ 941 $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null 942 rc=$? 943 if test $rc -ne 0; then 944 export=0 945 for file in $2; do 946 grep -q -E "EXPORT_SYMBOL.*($1)" \ 947 "$LINUX/$file" 2>/dev/null 948 rc=$? 949 if test $rc -eq 0; then 950 export=1 951 break; 952 fi 953 done 954 if test $export -eq 0; then : 955 $4 956 else : 957 $3 958 fi 959 else : 960 $3 961 fi 962]) 963 964dnl # 965dnl # ZFS_LINUX_TRY_COMPILE_SYMBOL 966dnl # 967dnl # Like ZFS_LINUX_TRY_COMPILER except ZFS_CHECK_SYMBOL_EXPORT is called 968dnl # to verify symbol exports, unless --enable-linux-builtin was provided 969dnl # to configure. 970dnl # 971AC_DEFUN([ZFS_LINUX_TRY_COMPILE_SYMBOL], [ 972 ZFS_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1]) 973 if test $rc -ne 0; then : 974 $6 975 else 976 if test "x$enable_linux_builtin" != xyes; then 977 ZFS_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1]) 978 fi 979 if test $rc -ne 0; then : 980 $6 981 else : 982 $5 983 fi 984 fi 985]) 986 987dnl # 988dnl # ZFS_LINUX_TRY_COMPILE_HEADER 989dnl # like ZFS_LINUX_TRY_COMPILE, except the contents conftest.h are 990dnl # provided via the fifth parameter 991dnl # 992AC_DEFUN([ZFS_LINUX_TRY_COMPILE_HEADER], [ 993 AS_IF([test "x$enable_linux_builtin" = "xyes"], [ 994 ZFS_LINUX_COMPILE_IFELSE( 995 [ZFS_LINUX_TEST_PROGRAM([[$1]], [[$2]], 996 [[ZFS_META_LICENSE]])], 997 [test -f build/conftest/conftest.o], [$3], [$4], [$5]) 998 ], [ 999 ZFS_LINUX_COMPILE_IFELSE( 1000 [ZFS_LINUX_TEST_PROGRAM([[$1]], [[$2]], 1001 [[ZFS_META_LICENSE]])], 1002 [test -f build/conftest/conftest.ko], [$3], [$4], [$5]) 1003 ]) 1004]) 1005 1006dnl # 1007dnl # AS_VERSION_COMPARE_LE 1008dnl # like AS_VERSION_COMPARE_LE, but runs $3 if (and only if) $1 <= $2 1009dnl # AS_VERSION_COMPARE_LE (version-1, version-2, [action-if-less-or-equal], [action-if-greater]) 1010dnl # 1011AC_DEFUN([AS_VERSION_COMPARE_LE], [ 1012 AS_VERSION_COMPARE([$1], [$2], [$3], [$3], [$4]) 1013]) 1014 1015dnl # 1016dnl # ZFS_LINUX_REQUIRE_API 1017dnl # like ZFS_LINUX_TEST_ERROR, except only fails if the kernel is 1018dnl # at least some specified version. 1019dnl # 1020AC_DEFUN([ZFS_LINUX_REQUIRE_API], [ 1021 AS_VERSION_COMPARE_LE([$2], [$kernsrcver], [ 1022 AC_MSG_ERROR([ 1023 *** None of the expected "$1" interfaces were detected. This 1024 *** interface is expected for kernels version "$2" and above. 1025 *** This may be because your kernel version is newer than what is 1026 *** supported, or you are using a patched custom kernel with 1027 *** incompatible modifications. Newer kernels may have incompatible 1028 *** APIs. 1029 *** 1030 *** ZFS Version: $ZFS_META_ALIAS 1031 *** Compatible Kernels: $ZFS_META_KVER_MIN - $ZFS_META_KVER_MAX 1032 ]) 1033 ], [ 1034 AC_MSG_RESULT(no) 1035 ]) 1036]) 1037