config/kernel.m4

   1 dnl #
   2 dnl # Default ZFS kernel configuration
   3 dnl #
   4 AC_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
  33 dnl #
  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.
  38 dnl #
  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_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE
  46         ZFS_AC_KERNEL_SRC_RWSEM
  47         ZFS_AC_KERNEL_SRC_SCHED
  48         ZFS_AC_KERNEL_SRC_USLEEP_RANGE
  49         ZFS_AC_KERNEL_SRC_KMEM_CACHE
  50         ZFS_AC_KERNEL_SRC_KVMALLOC
  51         ZFS_AC_KERNEL_SRC_VMALLOC_PAGE_KERNEL
  52         ZFS_AC_KERNEL_SRC_WAIT
  53         ZFS_AC_KERNEL_SRC_INODE_TIMES
  54         ZFS_AC_KERNEL_SRC_INODE_LOCK
  55         ZFS_AC_KERNEL_SRC_GROUP_INFO_GID
  56         ZFS_AC_KERNEL_SRC_RW
  57         ZFS_AC_KERNEL_SRC_TIMER_SETUP
  58         ZFS_AC_KERNEL_SRC_SUPER_USER_NS
  59         ZFS_AC_KERNEL_SRC_PROC_OPERATIONS
  60         ZFS_AC_KERNEL_SRC_BLOCK_DEVICE_OPERATIONS
  61         ZFS_AC_KERNEL_SRC_BIO
  62         ZFS_AC_KERNEL_SRC_BLKDEV
  63         ZFS_AC_KERNEL_SRC_BLK_QUEUE
  64         ZFS_AC_KERNEL_SRC_GENHD_FLAGS
  65         ZFS_AC_KERNEL_SRC_REVALIDATE_DISK
  66         ZFS_AC_KERNEL_SRC_GET_DISK_RO
  67         ZFS_AC_KERNEL_SRC_GENERIC_READLINK_GLOBAL
  68         ZFS_AC_KERNEL_SRC_DISCARD_GRANULARITY
  69         ZFS_AC_KERNEL_SRC_INODE_OWNER_OR_CAPABLE
  70         ZFS_AC_KERNEL_SRC_XATTR
  71         ZFS_AC_KERNEL_SRC_ACL
  72         ZFS_AC_KERNEL_SRC_INODE_GETATTR
  73         ZFS_AC_KERNEL_SRC_INODE_SET_FLAGS
  74         ZFS_AC_KERNEL_SRC_INODE_SET_IVERSION
  75         ZFS_AC_KERNEL_SRC_SHOW_OPTIONS
  76         ZFS_AC_KERNEL_SRC_FILE_INODE
  77         ZFS_AC_KERNEL_SRC_FILE_DENTRY
  78         ZFS_AC_KERNEL_SRC_FSYNC
  79         ZFS_AC_KERNEL_SRC_AIO_FSYNC
  80         ZFS_AC_KERNEL_SRC_EVICT_INODE
  81         ZFS_AC_KERNEL_SRC_DIRTY_INODE
  82         ZFS_AC_KERNEL_SRC_SHRINKER
  83         ZFS_AC_KERNEL_SRC_MKDIR
  84         ZFS_AC_KERNEL_SRC_LOOKUP_FLAGS
  85         ZFS_AC_KERNEL_SRC_CREATE
  86         ZFS_AC_KERNEL_SRC_PERMISSION
  87         ZFS_AC_KERNEL_SRC_GET_LINK
  88         ZFS_AC_KERNEL_SRC_PUT_LINK
  89         ZFS_AC_KERNEL_SRC_TMPFILE
  90         ZFS_AC_KERNEL_SRC_AUTOMOUNT
  91         ZFS_AC_KERNEL_SRC_ENCODE_FH_WITH_INODE
  92         ZFS_AC_KERNEL_SRC_COMMIT_METADATA
  93         ZFS_AC_KERNEL_SRC_CLEAR_INODE
  94         ZFS_AC_KERNEL_SRC_SETATTR_PREPARE
  95         ZFS_AC_KERNEL_SRC_INSERT_INODE_LOCKED
  96         ZFS_AC_KERNEL_SRC_DENTRY
  97         ZFS_AC_KERNEL_SRC_TRUNCATE_SETSIZE
  98         ZFS_AC_KERNEL_SRC_SECURITY_INODE
  99         ZFS_AC_KERNEL_SRC_FST_MOUNT
 100         ZFS_AC_KERNEL_SRC_BDI
 101         ZFS_AC_KERNEL_SRC_SET_NLINK
 102         ZFS_AC_KERNEL_SRC_SGET
 103         ZFS_AC_KERNEL_SRC_LSEEK_EXECUTE
 104         ZFS_AC_KERNEL_SRC_VFS_FILEMAP_DIRTY_FOLIO
 105         ZFS_AC_KERNEL_SRC_VFS_GETATTR
 106         ZFS_AC_KERNEL_SRC_VFS_FSYNC_2ARGS
 107         ZFS_AC_KERNEL_SRC_VFS_ITERATE
 108         ZFS_AC_KERNEL_SRC_VFS_DIRECT_IO
 109         ZFS_AC_KERNEL_SRC_VFS_RW_ITERATE
 110         ZFS_AC_KERNEL_SRC_VFS_GENERIC_WRITE_CHECKS
 111         ZFS_AC_KERNEL_SRC_VFS_IOV_ITER
 112         ZFS_AC_KERNEL_SRC_KMAP_ATOMIC_ARGS
 113         ZFS_AC_KERNEL_SRC_FOLLOW_DOWN_ONE
 114         ZFS_AC_KERNEL_SRC_MAKE_REQUEST_FN
 115         ZFS_AC_KERNEL_SRC_GENERIC_IO_ACCT
 116         ZFS_AC_KERNEL_SRC_FPU
 117         ZFS_AC_KERNEL_SRC_FMODE_T
 118         ZFS_AC_KERNEL_SRC_KUIDGID_T
 119         ZFS_AC_KERNEL_SRC_KUID_HELPERS
 120         ZFS_AC_KERNEL_SRC_MODULE_PARAM_CALL_CONST
 121         ZFS_AC_KERNEL_SRC_RENAME
 122         ZFS_AC_KERNEL_SRC_CURRENT_TIME
 123         ZFS_AC_KERNEL_SRC_USERNS_CAPABILITIES
 124         ZFS_AC_KERNEL_SRC_IN_COMPAT_SYSCALL
 125         ZFS_AC_KERNEL_SRC_KTIME
 126         ZFS_AC_KERNEL_SRC_TOTALRAM_PAGES_FUNC
 127         ZFS_AC_KERNEL_SRC_TOTALHIGH_PAGES
 128         ZFS_AC_KERNEL_SRC_KSTRTOUL
 129         ZFS_AC_KERNEL_SRC_PERCPU
 130         ZFS_AC_KERNEL_SRC_CPU_HOTPLUG
 131         ZFS_AC_KERNEL_SRC_GENERIC_FILLATTR_USERNS
 132         ZFS_AC_KERNEL_SRC_MKNOD
 133         ZFS_AC_KERNEL_SRC_SYMLINK
 134         ZFS_AC_KERNEL_SRC_BIO_MAX_SEGS
 135         ZFS_AC_KERNEL_SRC_SIGNAL_STOP
 136         ZFS_AC_KERNEL_SRC_SIGINFO
 137         ZFS_AC_KERNEL_SRC_SYSFS
 138         ZFS_AC_KERNEL_SRC_SET_SPECIAL_STATE
 139         ZFS_AC_KERNEL_SRC_VFS_READPAGES
 140         ZFS_AC_KERNEL_SRC_VFS_SET_PAGE_DIRTY_NOBUFFERS
 141         ZFS_AC_KERNEL_SRC_STANDALONE_LINUX_STDARG
 142         ZFS_AC_KERNEL_SRC_PAGEMAP_FOLIO_WAIT_BIT
 143         ZFS_AC_KERNEL_SRC_ADD_DISK
 144         ZFS_AC_KERNEL_SRC_KTHREAD
 145         ZFS_AC_KERNEL_SRC_ZERO_PAGE
 146         ZFS_AC_KERNEL_SRC___COPY_FROM_USER_INATOMIC
 147
 148         AC_MSG_CHECKING([for available kernel interfaces])
 149         ZFS_LINUX_TEST_COMPILE_ALL([kabi])
 150         AC_MSG_RESULT([done])
 151 ])
 152
 153 dnl #
 154 dnl # Check results of kernel interface tests.
 155 dnl #
 156 AC_DEFUN([ZFS_AC_KERNEL_TEST_RESULT], [
 157         ZFS_AC_KERNEL_ACCESS_OK_TYPE
 158         ZFS_AC_KERNEL_GLOBAL_PAGE_STATE
 159         ZFS_AC_KERNEL_OBJTOOL
 160         ZFS_AC_KERNEL_PDE_DATA
 161         ZFS_AC_KERNEL_FALLOCATE
 162         ZFS_AC_KERNEL_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE
 163         ZFS_AC_KERNEL_RWSEM
 164         ZFS_AC_KERNEL_SCHED
 165         ZFS_AC_KERNEL_USLEEP_RANGE
 166         ZFS_AC_KERNEL_KMEM_CACHE
 167         ZFS_AC_KERNEL_KVMALLOC
 168         ZFS_AC_KERNEL_VMALLOC_PAGE_KERNEL
 169         ZFS_AC_KERNEL_WAIT
 170         ZFS_AC_KERNEL_INODE_TIMES
 171         ZFS_AC_KERNEL_INODE_LOCK
 172         ZFS_AC_KERNEL_GROUP_INFO_GID
 173         ZFS_AC_KERNEL_RW
 174         ZFS_AC_KERNEL_TIMER_SETUP
 175         ZFS_AC_KERNEL_SUPER_USER_NS
 176         ZFS_AC_KERNEL_PROC_OPERATIONS
 177         ZFS_AC_KERNEL_BLOCK_DEVICE_OPERATIONS
 178         ZFS_AC_KERNEL_BIO
 179         ZFS_AC_KERNEL_BLKDEV
 180         ZFS_AC_KERNEL_BLK_QUEUE
 181         ZFS_AC_KERNEL_GENHD_FLAGS
 182         ZFS_AC_KERNEL_REVALIDATE_DISK
 183         ZFS_AC_KERNEL_GET_DISK_RO
 184         ZFS_AC_KERNEL_GENERIC_READLINK_GLOBAL
 185         ZFS_AC_KERNEL_DISCARD_GRANULARITY
 186         ZFS_AC_KERNEL_INODE_OWNER_OR_CAPABLE
 187         ZFS_AC_KERNEL_XATTR
 188         ZFS_AC_KERNEL_ACL
 189         ZFS_AC_KERNEL_INODE_GETATTR
 190         ZFS_AC_KERNEL_INODE_SET_FLAGS
 191         ZFS_AC_KERNEL_INODE_SET_IVERSION
 192         ZFS_AC_KERNEL_SHOW_OPTIONS
 193         ZFS_AC_KERNEL_FILE_INODE
 194         ZFS_AC_KERNEL_FILE_DENTRY
 195         ZFS_AC_KERNEL_FSYNC
 196         ZFS_AC_KERNEL_AIO_FSYNC
 197         ZFS_AC_KERNEL_EVICT_INODE
 198         ZFS_AC_KERNEL_DIRTY_INODE
 199         ZFS_AC_KERNEL_SHRINKER
 200         ZFS_AC_KERNEL_MKDIR
 201         ZFS_AC_KERNEL_LOOKUP_FLAGS
 202         ZFS_AC_KERNEL_CREATE
 203         ZFS_AC_KERNEL_PERMISSION
 204         ZFS_AC_KERNEL_GET_LINK
 205         ZFS_AC_KERNEL_PUT_LINK
 206         ZFS_AC_KERNEL_TMPFILE
 207         ZFS_AC_KERNEL_AUTOMOUNT
 208         ZFS_AC_KERNEL_ENCODE_FH_WITH_INODE
 209         ZFS_AC_KERNEL_COMMIT_METADATA
 210         ZFS_AC_KERNEL_CLEAR_INODE
 211         ZFS_AC_KERNEL_SETATTR_PREPARE
 212         ZFS_AC_KERNEL_INSERT_INODE_LOCKED
 213         ZFS_AC_KERNEL_DENTRY
 214         ZFS_AC_KERNEL_TRUNCATE_SETSIZE
 215         ZFS_AC_KERNEL_SECURITY_INODE
 216         ZFS_AC_KERNEL_FST_MOUNT
 217         ZFS_AC_KERNEL_BDI
 218         ZFS_AC_KERNEL_SET_NLINK
 219         ZFS_AC_KERNEL_SGET
 220         ZFS_AC_KERNEL_LSEEK_EXECUTE
 221         ZFS_AC_KERNEL_VFS_FILEMAP_DIRTY_FOLIO
 222         ZFS_AC_KERNEL_VFS_GETATTR
 223         ZFS_AC_KERNEL_VFS_FSYNC_2ARGS
 224         ZFS_AC_KERNEL_VFS_ITERATE
 225         ZFS_AC_KERNEL_VFS_DIRECT_IO
 226         ZFS_AC_KERNEL_VFS_RW_ITERATE
 227         ZFS_AC_KERNEL_VFS_GENERIC_WRITE_CHECKS
 228         ZFS_AC_KERNEL_VFS_IOV_ITER
 229         ZFS_AC_KERNEL_KMAP_ATOMIC_ARGS
 230         ZFS_AC_KERNEL_FOLLOW_DOWN_ONE
 231         ZFS_AC_KERNEL_MAKE_REQUEST_FN
 232         ZFS_AC_KERNEL_GENERIC_IO_ACCT
 233         ZFS_AC_KERNEL_FPU
 234         ZFS_AC_KERNEL_FMODE_T
 235         ZFS_AC_KERNEL_KUIDGID_T
 236         ZFS_AC_KERNEL_KUID_HELPERS
 237         ZFS_AC_KERNEL_MODULE_PARAM_CALL_CONST
 238         ZFS_AC_KERNEL_RENAME
 239         ZFS_AC_KERNEL_CURRENT_TIME
 240         ZFS_AC_KERNEL_USERNS_CAPABILITIES
 241         ZFS_AC_KERNEL_IN_COMPAT_SYSCALL
 242         ZFS_AC_KERNEL_KTIME
 243         ZFS_AC_KERNEL_TOTALRAM_PAGES_FUNC
 244         ZFS_AC_KERNEL_TOTALHIGH_PAGES
 245         ZFS_AC_KERNEL_KSTRTOUL
 246         ZFS_AC_KERNEL_PERCPU
 247         ZFS_AC_KERNEL_CPU_HOTPLUG
 248         ZFS_AC_KERNEL_GENERIC_FILLATTR_USERNS
 249         ZFS_AC_KERNEL_MKNOD
 250         ZFS_AC_KERNEL_SYMLINK
 251         ZFS_AC_KERNEL_BIO_MAX_SEGS
 252         ZFS_AC_KERNEL_SIGNAL_STOP
 253         ZFS_AC_KERNEL_SIGINFO
 254         ZFS_AC_KERNEL_SYSFS
 255         ZFS_AC_KERNEL_SET_SPECIAL_STATE
 256         ZFS_AC_KERNEL_VFS_READPAGES
 257         ZFS_AC_KERNEL_VFS_SET_PAGE_DIRTY_NOBUFFERS
 258         ZFS_AC_KERNEL_STANDALONE_LINUX_STDARG
 259         ZFS_AC_KERNEL_PAGEMAP_FOLIO_WAIT_BIT
 260         ZFS_AC_KERNEL_ADD_DISK
 261         ZFS_AC_KERNEL_KTHREAD
 262         ZFS_AC_KERNEL_ZERO_PAGE
 263         ZFS_AC_KERNEL___COPY_FROM_USER_INATOMIC
 264 ])
 265
 266 dnl #
 267 dnl # Detect name used for Module.symvers file in kernel
 268 dnl #
 269 AC_DEFUN([ZFS_AC_MODULE_SYMVERS], [
 270         modpost=$LINUX/scripts/Makefile.modpost
 271         AC_MSG_CHECKING([kernel file name for module symbols])
 272         AS_IF([test "x$enable_linux_builtin" != xyes -a -f "$modpost"], [
 273                 AS_IF([grep -q Modules.symvers $modpost], [
 274                         LINUX_SYMBOLS=Modules.symvers
 275                 ], [
 276                         LINUX_SYMBOLS=Module.symvers
 277                 ])
 278
 279                 AS_IF([test ! -f "$LINUX_OBJ/$LINUX_SYMBOLS"], [
 280                         AC_MSG_ERROR([
 281         *** Please make sure the kernel devel package for your distribution
 282         *** is installed.  If you are building with a custom kernel, make sure
 283         *** the kernel is configured, built, and the '--with-linux=PATH'
 284         *** configure option refers to the location of the kernel source.
 285                         ])
 286                 ])
 287         ], [
 288                 LINUX_SYMBOLS=NONE
 289         ])
 290         AC_MSG_RESULT($LINUX_SYMBOLS)
 291         AC_SUBST(LINUX_SYMBOLS)
 292 ])
 293
 294 dnl #
 295 dnl # Detect the kernel to be built against
 296 dnl #
 297 dnl # Most modern Linux distributions have separate locations for bare
 298 dnl # source (source) and prebuilt (build) files. Additionally, there are
 299 dnl # `source` and `build` symlinks in `/lib/modules/$(KERNEL_VERSION)`
 300 dnl # pointing to them. The directory search order is now:
 301 dnl #
 302 dnl # - `configure` command line values if both `--with-linux` and
 303 dnl #   `--with-linux-obj` were defined
 304 dnl #
 305 dnl # - If only `--with-linux` was defined, `--with-linux-obj` is assumed
 306 dnl #   to have the same value as `--with-linux`
 307 dnl #
 308 dnl # - If neither `--with-linux` nor `--with-linux-obj` were defined
 309 dnl #   autodetection is used:
 310 dnl #
 311 dnl #   - `/lib/modules/$(uname -r)/{source,build}` respectively, if exist.
 312 dnl #
 313 dnl #   - If only `/lib/modules/$(uname -r)/build` exists, it is assumed
 314 dnl #     to be both source and build directory.
 315 dnl #
 316 dnl #   - The first directory in `/lib/modules` with the highest version
 317 dnl #     number according to `sort -V` which contains both `source` and
 318 dnl #     `build` symlinks/directories. If module directory contains only
 319 dnl #     `build` component, it is assumed to be both source and build
 320 dnl #     directory.
 321 dnl #
 322 dnl #   - Last resort: the first directory matching `/usr/src/kernels/*`
 323 dnl #     and `/usr/src/linux-*` with the highest version number according
 324 dnl #     to `sort -V` is assumed to be both source and build directory.
 325 dnl #
 326 AC_DEFUN([ZFS_AC_KERNEL], [
 327         AC_ARG_WITH([linux],
 328                 AS_HELP_STRING([--with-linux=PATH],
 329                 [Path to kernel source]),
 330                 [kernelsrc="$withval"])
 331
 332         AC_ARG_WITH(linux-obj,
 333                 AS_HELP_STRING([--with-linux-obj=PATH],
 334                 [Path to kernel build objects]),
 335                 [kernelbuild="$withval"])
 336
 337         AC_MSG_CHECKING([kernel source and build directories])
 338         AS_IF([test -n "$kernelsrc" && test -z "$kernelbuild"], [
 339                 kernelbuild="$kernelsrc"
 340         ], [test -z "$kernelsrc"], [
 341                 AS_IF([test -e "/lib/modules/$(uname -r)/source" && \
 342                        test -e "/lib/modules/$(uname -r)/build"], [
 343                         src="/lib/modules/$(uname -r)/source"
 344                         build="/lib/modules/$(uname -r)/build"
 345                 ], [test -e "/lib/modules/$(uname -r)/build"], [
 346                         build="/lib/modules/$(uname -r)/build"
 347                         src="$build"
 348                 ], [
 349                         src=
 350
 351                         for d in $(ls -1d /lib/modules/* 2>/dev/null | sort -Vr); do
 352                                 if test -e "$d/source" && test -e "$d/build"; then
 353                                         src="$d/source"
 354                                         build="$d/build"
 355                                         break
 356                                 fi
 357
 358                                 if test -e "$d/build"; then
 359                                         src="$d/build"
 360                                         build="$d/build"
 361                                         break
 362                                 fi
 363                         done
 364
 365                         # the least reliable method
 366                         if test -z "$src"; then
 367                                 src=$(ls -1d /usr/src/kernels/* /usr/src/linux-* \
 368                                       2>/dev/null | grep -v obj | sort -Vr | head -1)
 369                                 build="$src"
 370                         fi
 371                 ])
 372
 373                 AS_IF([test -n "$src" && test -e "$src"], [
 374                         kernelsrc=$(readlink -e "$src")
 375                 ], [
 376                         kernelsrc="[Not found]"
 377                 ])
 378                 AS_IF([test -n "$build" && test -e "$build"], [
 379                         kernelbuild=$(readlink -e "$build")
 380                 ], [
 381                         kernelbuild="[Not found]"
 382                 ])
 383         ], [
 384                 AS_IF([test "$kernelsrc" = "NONE"], [
 385                         kernsrcver=NONE
 386                 ])
 387                 withlinux=yes
 388         ])
 389
 390         AC_MSG_RESULT([done])
 391         AC_MSG_CHECKING([kernel source directory])
 392         AC_MSG_RESULT([$kernelsrc])
 393         AC_MSG_CHECKING([kernel build directory])
 394         AC_MSG_RESULT([$kernelbuild])
 395         AS_IF([test ! -d "$kernelsrc" || test ! -d "$kernelbuild"], [
 396                 AC_MSG_ERROR([
 397         *** Please make sure the kernel devel package for your distribution
 398         *** is installed and then try again.  If that fails, you can specify the
 399         *** location of the kernel source and build with the '--with-linux=PATH' and
 400         *** '--with-linux-obj=PATH' options respectively.])
 401         ])
 402
 403         AC_MSG_CHECKING([kernel source version])
 404         utsrelease1=$kernelbuild/include/linux/version.h
 405         utsrelease2=$kernelbuild/include/linux/utsrelease.h
 406         utsrelease3=$kernelbuild/include/generated/utsrelease.h
 407         AS_IF([test -r $utsrelease1 && grep -qF UTS_RELEASE $utsrelease1], [
 408                 utsrelease=$utsrelease1
 409         ], [test -r $utsrelease2 && grep -qF UTS_RELEASE $utsrelease2], [
 410                 utsrelease=$utsrelease2
 411         ], [test -r $utsrelease3 && grep -qF UTS_RELEASE $utsrelease3], [
 412                 utsrelease=$utsrelease3
 413         ])
 414
 415         AS_IF([test -n "$utsrelease"], [
 416                 kernsrcver=$($AWK '/UTS_RELEASE/ { gsub(/"/, "", $[3]); print $[3] }' $utsrelease)
 417                 AS_IF([test -z "$kernsrcver"], [
 418                         AC_MSG_RESULT([Not found])
 419                         AC_MSG_ERROR([
 420         *** Cannot determine kernel version.
 421                         ])
 422                 ])
 423         ], [
 424                 AC_MSG_RESULT([Not found])
 425                 if test "x$enable_linux_builtin" != xyes; then
 426                         AC_MSG_ERROR([
 427         *** Cannot find UTS_RELEASE definition.
 428                         ])
 429                 else
 430                         AC_MSG_ERROR([
 431         *** Cannot find UTS_RELEASE definition.
 432         *** Please run 'make prepare' inside the kernel source tree.])
 433                 fi
 434         ])
 435
 436         AC_MSG_RESULT([$kernsrcver])
 437
 438         AS_VERSION_COMPARE([$kernsrcver], [$ZFS_META_KVER_MIN], [
 439                  AC_MSG_ERROR([
 440         *** Cannot build against kernel version $kernsrcver.
 441         *** The minimum supported kernel version is $ZFS_META_KVER_MIN.
 442                 ])
 443         ])
 444
 445         LINUX=${kernelsrc}
 446         LINUX_OBJ=${kernelbuild}
 447         LINUX_VERSION=${kernsrcver}
 448
 449         AC_SUBST(LINUX)
 450         AC_SUBST(LINUX_OBJ)
 451         AC_SUBST(LINUX_VERSION)
 452 ])
 453
 454 dnl #
 455 dnl # Detect the QAT module to be built against, QAT provides hardware
 456 dnl # acceleration for data compression:
 457 dnl #
 458 dnl # https://01.org/intel-quickassist-technology
 459 dnl #
 460 dnl # 1) Download and install QAT driver from the above link
 461 dnl # 2) Start QAT driver in your system:
 462 dnl #    service qat_service start
 463 dnl # 3) Enable QAT in ZFS, e.g.:
 464 dnl #    ./configure --with-qat=<qat-driver-path>/QAT1.6
 465 dnl #    make
 466 dnl # 4) Set GZIP compression in ZFS dataset:
 467 dnl #    zfs set compression = gzip <dataset>
 468 dnl #
 469 dnl # Then the data written to this ZFS pool is compressed by QAT accelerator
 470 dnl # automatically, and de-compressed by QAT when read from the pool.
 471 dnl #
 472 dnl # 1) Get QAT hardware statistics with:
 473 dnl #    cat /proc/icp_dh895xcc_dev/qat
 474 dnl # 2) To disable QAT:
 475 dnl #    insmod zfs.ko zfs_qat_disable=1
 476 dnl #
 477 AC_DEFUN([ZFS_AC_QAT], [
 478         AC_ARG_WITH([qat],
 479                 AS_HELP_STRING([--with-qat=PATH],
 480                 [Path to qat source]),
 481                 AS_IF([test "$withval" = "yes"],
 482                         AC_MSG_ERROR([--with-qat=PATH requires a PATH]),
 483                         [qatsrc="$withval"]))
 484
 485         AC_ARG_WITH([qat-obj],
 486                 AS_HELP_STRING([--with-qat-obj=PATH],
 487                 [Path to qat build objects]),
 488                 [qatbuild="$withval"])
 489
 490         AS_IF([test ! -z "${qatsrc}"], [
 491                 AC_MSG_CHECKING([qat source directory])
 492                 AC_MSG_RESULT([$qatsrc])
 493                 QAT_SRC="${qatsrc}/quickassist"
 494                 AS_IF([ test ! -e "$QAT_SRC/include/cpa.h"], [
 495                         AC_MSG_ERROR([
 496         *** Please make sure the qat driver package is installed
 497         *** and specify the location of the qat source with the
 498         *** '--with-qat=PATH' option then try again. Failed to
 499         *** find cpa.h in:
 500         ${QAT_SRC}/include])
 501                 ])
 502         ])
 503
 504         AS_IF([test ! -z "${qatsrc}"], [
 505                 AC_MSG_CHECKING([qat build directory])
 506                 AS_IF([test -z "$qatbuild"], [
 507                         qatbuild="${qatsrc}/build"
 508                 ])
 509
 510                 AC_MSG_RESULT([$qatbuild])
 511                 QAT_OBJ=${qatbuild}
 512                 AS_IF([ ! test -e "$QAT_OBJ/icp_qa_al.ko" && ! test -e "$QAT_OBJ/qat_api.ko"], [
 513                         AC_MSG_ERROR([
 514         *** Please make sure the qat driver is installed then try again.
 515         *** Failed to find icp_qa_al.ko or qat_api.ko in:
 516         $QAT_OBJ])
 517                 ])
 518
 519                 AC_SUBST(QAT_SRC)
 520                 AC_SUBST(QAT_OBJ)
 521
 522                 AC_DEFINE(HAVE_QAT, 1,
 523                 [qat is enabled and existed])
 524         ])
 525
 526         dnl #
 527         dnl # Detect the name used for the QAT Module.symvers file.
 528         dnl #
 529         AS_IF([test ! -z "${qatsrc}"], [
 530                 AC_MSG_CHECKING([qat file for module symbols])
 531                 QAT_SYMBOLS=$QAT_SRC/lookaside/access_layer/src/Module.symvers
 532
 533                 AS_IF([test -r $QAT_SYMBOLS], [
 534                         AC_MSG_RESULT([$QAT_SYMBOLS])
 535                         AC_SUBST(QAT_SYMBOLS)
 536                 ],[
 537                         AC_MSG_ERROR([
 538         *** Please make sure the qat driver is installed then try again.
 539         *** Failed to find Module.symvers in:
 540         $QAT_SYMBOLS
 541                         ])
 542                 ])
 543         ])
 544 ])
 545
 546 dnl #
 547 dnl # ZFS_LINUX_CONFTEST_H
 548 dnl #
 549 AC_DEFUN([ZFS_LINUX_CONFTEST_H], [
 550 test -d build/$2 || mkdir -p build/$2
 551 cat - <<_ACEOF >build/$2/$2.h
 552 $1
 553 _ACEOF
 554 ])
 555
 556 dnl #
 557 dnl # ZFS_LINUX_CONFTEST_C
 558 dnl #
 559 AC_DEFUN([ZFS_LINUX_CONFTEST_C], [
 560 test -d build/$2 || mkdir -p build/$2
 561 cat confdefs.h - <<_ACEOF >build/$2/$2.c
 562 $1
 563 _ACEOF
 564 ])
 565
 566 dnl #
 567 dnl # ZFS_LINUX_CONFTEST_MAKEFILE
 568 dnl #
 569 dnl # $1 - test case name
 570 dnl # $2 - add to top-level Makefile
 571 dnl # $3 - additional build flags
 572 dnl #
 573 AC_DEFUN([ZFS_LINUX_CONFTEST_MAKEFILE], [
 574         test -d build || mkdir -p build
 575         test -d build/$1 || mkdir -p build/$1
 576
 577         file=build/$1/Makefile
 578
 579         dnl # Example command line to manually build source.
 580         cat - <<_ACEOF >$file
 581 # Example command line to manually build source
 582 # make modules -C $LINUX_OBJ $ARCH_UM M=$PWD/build/$1
 583
 584 ccflags-y := -Werror $FRAME_LARGER_THAN
 585 _ACEOF
 586
 587         dnl # Additional custom CFLAGS as requested.
 588         m4_ifval($3, [echo "ccflags-y += $3" >>$file], [])
 589
 590         dnl # Test case source
 591         echo "obj-m := $1.o" >>$file
 592
 593         AS_IF([test "x$2" = "xyes"], [echo "obj-m += $1/" >>build/Makefile], [])
 594 ])
 595
 596 dnl #
 597 dnl # ZFS_LINUX_TEST_PROGRAM(C)([PROLOGUE], [BODY])
 598 dnl #
 599 m4_define([ZFS_LINUX_TEST_PROGRAM], [
 600 #include <linux/module.h>
 601 $1
 602
 603 int
 604 main (void)
 605 {
 606 $2
 607         ;
 608         return 0;
 609 }
 610
 611 MODULE_DESCRIPTION("conftest");
 612 MODULE_AUTHOR(ZFS_META_AUTHOR);
 613 MODULE_VERSION(ZFS_META_VERSION "-" ZFS_META_RELEASE);
 614 MODULE_LICENSE($3);
 615 ])
 616
 617 dnl #
 618 dnl # ZFS_LINUX_TEST_REMOVE
 619 dnl #
 620 dnl # Removes the specified test source and results.
 621 dnl #
 622 AC_DEFUN([ZFS_LINUX_TEST_REMOVE], [
 623         test -d build/$1 && rm -Rf build/$1
 624         test -f build/Makefile && sed '/$1/d' build/Makefile
 625 ])
 626
 627 dnl #
 628 dnl # ZFS_LINUX_COMPILE
 629 dnl #
 630 dnl # $1 - build dir
 631 dnl # $2 - test command
 632 dnl # $3 - pass command
 633 dnl # $4 - fail command
 634 dnl # $5 - set KBUILD_MODPOST_NOFINAL='yes'
 635 dnl # $6 - set KBUILD_MODPOST_WARN='yes'
 636 dnl #
 637 dnl # Used internally by ZFS_LINUX_TEST_{COMPILE,MODPOST}
 638 dnl #
 639 AC_DEFUN([ZFS_LINUX_COMPILE], [
 640         AC_ARG_VAR([KERNEL_CC], [C compiler for
 641                 building kernel modules])
 642         AC_ARG_VAR([KERNEL_LD], [Linker for
 643                 building kernel modules])
 644         AC_ARG_VAR([KERNEL_LLVM], [Binary option to
 645                 build kernel modules with LLVM/CLANG toolchain])
 646         AC_TRY_COMMAND([
 647             KBUILD_MODPOST_NOFINAL="$5" KBUILD_MODPOST_WARN="$6"
 648             make modules -k -j$TEST_JOBS ${KERNEL_CC:+CC=$KERNEL_CC}
 649             ${KERNEL_LD:+LD=$KERNEL_LD} ${KERNEL_LLVM:+LLVM=$KERNEL_LLVM}
 650             CONFIG_MODULES=y CFLAGS_MODULE=-DCONFIG_MODULES
 651             -C $LINUX_OBJ $ARCH_UM M=$PWD/$1 >$1/build.log 2>&1])
 652         AS_IF([AC_TRY_COMMAND([$2])], [$3], [$4])
 653 ])
 654
 655 dnl #
 656 dnl # ZFS_LINUX_TEST_COMPILE
 657 dnl #
 658 dnl # Perform a full compile excluding the final modpost phase.
 659 dnl #
 660 AC_DEFUN([ZFS_LINUX_TEST_COMPILE], [
 661         ZFS_LINUX_COMPILE([$2], [test -f $2/build.log], [
 662                 mv $2/Makefile $2/Makefile.compile.$1
 663                 mv $2/build.log $2/build.log.$1
 664         ],[
 665                 AC_MSG_ERROR([
 666         *** Unable to compile test source to determine kernel interfaces.])
 667         ], [yes], [])
 668 ])
 669
 670 dnl #
 671 dnl # ZFS_LINUX_TEST_MODPOST
 672 dnl #
 673 dnl # Perform a full compile including the modpost phase.  This may
 674 dnl # be an incremental build if the objects have already been built.
 675 dnl #
 676 AC_DEFUN([ZFS_LINUX_TEST_MODPOST], [
 677         ZFS_LINUX_COMPILE([$2], [test -f $2/build.log], [
 678                 mv $2/Makefile $2/Makefile.modpost.$1
 679                 cat $2/build.log >>build/build.log.$1
 680         ],[
 681                 AC_MSG_ERROR([
 682         *** Unable to modpost test source to determine kernel interfaces.])
 683         ], [], [yes])
 684 ])
 685
 686 dnl #
 687 dnl # Perform the compilation of the test cases in two phases.
 688 dnl #
 689 dnl # Phase 1) attempt to build the object files for all of the tests
 690 dnl #          defined by the ZFS_LINUX_TEST_SRC macro.  But do not
 691 dnl #          perform the final modpost stage.
 692 dnl #
 693 dnl # Phase 2) disable all tests which failed the initial compilation,
 694 dnl #          then invoke the final modpost step for the remaining tests.
 695 dnl #
 696 dnl # This allows us efficiently build the test cases in parallel while
 697 dnl # remaining resilient to build failures which are expected when
 698 dnl # detecting the available kernel interfaces.
 699 dnl #
 700 dnl # The maximum allowed parallelism can be controlled by setting the
 701 dnl # TEST_JOBS environment variable.  Otherwise, it default to $(nproc).
 702 dnl #
 703 AC_DEFUN([ZFS_LINUX_TEST_COMPILE_ALL], [
 704         dnl # Phase 1 - Compilation only, final linking is skipped.
 705         ZFS_LINUX_TEST_COMPILE([$1], [build])
 706
 707         dnl #
 708         dnl # Phase 2 - When building external modules disable test cases
 709         dnl # which failed to compile and invoke modpost to verify the
 710         dnl # final linking.
 711         dnl #
 712         dnl # Test names suffixed with '_license' call modpost independently
 713         dnl # to ensure that a single incompatibility does not result in the
 714         dnl # modpost phase exiting early.  This check is not performed on
 715         dnl # every symbol since the majority are compatible and doing so
 716         dnl # would significantly slow down this phase.
 717         dnl #
 718         dnl # When configuring for builtin (--enable-linux-builtin)
 719         dnl # fake the linking step artificially create the expected .ko
 720         dnl # files for tests which did compile.  This is required for
 721         dnl # kernels which do not have loadable module support or have
 722         dnl # not yet been built.
 723         dnl #
 724         AS_IF([test "x$enable_linux_builtin" = "xno"], [
 725                 for dir in $(awk '/^obj-m/ { print [$]3 }' \
 726                     build/Makefile.compile.$1); do
 727                         name=${dir%/}
 728                         AS_IF([test -f build/$name/$name.o], [
 729                                 AS_IF([test "${name##*_}" = "license"], [
 730                                         ZFS_LINUX_TEST_MODPOST([$1],
 731                                             [build/$name])
 732                                         echo "obj-n += $dir" >>build/Makefile
 733                                 ], [
 734                                         echo "obj-m += $dir" >>build/Makefile
 735                                 ])
 736                         ], [
 737                                 echo "obj-n += $dir" >>build/Makefile
 738                         ])
 739                 done
 740
 741                 ZFS_LINUX_TEST_MODPOST([$1], [build])
 742         ], [
 743                 for dir in $(awk '/^obj-m/ { print [$]3 }' \
 744                     build/Makefile.compile.$1); do
 745                         name=${dir%/}
 746                         AS_IF([test -f build/$name/$name.o], [
 747                                 touch build/$name/$name.ko
 748                         ])
 749                 done
 750         ])
 751 ])
 752
 753 dnl #
 754 dnl # ZFS_LINUX_TEST_SRC
 755 dnl #
 756 dnl # $1 - name
 757 dnl # $2 - global
 758 dnl # $3 - source
 759 dnl # $4 - extra cflags
 760 dnl # $5 - check license-compatibility
 761 dnl #
 762 dnl # Check if the test source is buildable at all and then if it is
 763 dnl # license compatible.
 764 dnl #
 765 dnl # N.B because all of the test cases are compiled in parallel they
 766 dnl # must never depend on the results of previous tests.  Each test
 767 dnl # needs to be entirely independent.
 768 dnl #
 769 AC_DEFUN([ZFS_LINUX_TEST_SRC], [
 770         ZFS_LINUX_CONFTEST_C([ZFS_LINUX_TEST_PROGRAM([[$2]], [[$3]],
 771             [["Dual BSD/GPL"]])], [$1])
 772         ZFS_LINUX_CONFTEST_MAKEFILE([$1], [yes], [$4])
 773
 774         AS_IF([ test -n "$5" ], [
 775                 ZFS_LINUX_CONFTEST_C([ZFS_LINUX_TEST_PROGRAM(
 776                     [[$2]], [[$3]], [[$5]])], [$1_license])
 777                 ZFS_LINUX_CONFTEST_MAKEFILE([$1_license], [yes], [$4])
 778         ])
 779 ])
 780
 781 dnl #
 782 dnl # ZFS_LINUX_TEST_RESULT
 783 dnl #
 784 dnl # $1 - name of a test source (ZFS_LINUX_TEST_SRC)
 785 dnl # $2 - run on success (valid .ko generated)
 786 dnl # $3 - run on failure (unable to compile)
 787 dnl #
 788 AC_DEFUN([ZFS_LINUX_TEST_RESULT], [
 789         AS_IF([test -d build/$1], [
 790                 AS_IF([test -f build/$1/$1.ko], [$2], [$3])
 791         ], [
 792                 AC_MSG_ERROR([
 793         *** No matching source for the "$1" test, check that
 794         *** both the test source and result macros refer to the same name.
 795                 ])
 796         ])
 797 ])
 798
 799 dnl #
 800 dnl # ZFS_LINUX_TEST_ERROR
 801 dnl #
 802 dnl # Generic error message which can be used when none of the expected
 803 dnl # kernel interfaces were detected.
 804 dnl #
 805 AC_DEFUN([ZFS_LINUX_TEST_ERROR], [
 806         AC_MSG_ERROR([
 807         *** None of the expected "$1" interfaces were detected.
 808         *** This may be because your kernel version is newer than what is
 809         *** supported, or you are using a patched custom kernel with
 810         *** incompatible modifications.
 811         ***
 812         *** ZFS Version: $ZFS_META_ALIAS
 813         *** Compatible Kernels: $ZFS_META_KVER_MIN - $ZFS_META_KVER_MAX
 814         ])
 815 ])
 816
 817 dnl #
 818 dnl # ZFS_LINUX_TEST_RESULT_SYMBOL
 819 dnl #
 820 dnl # Like ZFS_LINUX_TEST_RESULT except ZFS_CHECK_SYMBOL_EXPORT is called to
 821 dnl # verify symbol exports, unless --enable-linux-builtin was provided to
 822 dnl # configure.
 823 dnl #
 824 AC_DEFUN([ZFS_LINUX_TEST_RESULT_SYMBOL], [
 825         AS_IF([ ! test -f build/$1/$1.ko], [
 826                 $5
 827         ], [
 828                 AS_IF([test "x$enable_linux_builtin" != "xyes"], [
 829                         ZFS_CHECK_SYMBOL_EXPORT([$2], [$3], [$4], [$5])
 830                 ], [
 831                         $4
 832                 ])
 833         ])
 834 ])
 835
 836 dnl #
 837 dnl # ZFS_LINUX_COMPILE_IFELSE
 838 dnl #
 839 AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [
 840         ZFS_LINUX_TEST_REMOVE([conftest])
 841
 842         m4_ifvaln([$1], [ZFS_LINUX_CONFTEST_C([$1], [conftest])])
 843         m4_ifvaln([$5], [ZFS_LINUX_CONFTEST_H([$5], [conftest])],
 844             [ZFS_LINUX_CONFTEST_H([], [conftest])])
 845
 846         ZFS_LINUX_CONFTEST_MAKEFILE([conftest], [no],
 847             [m4_ifvaln([$5], [-I$PWD/build/conftest], [])])
 848         ZFS_LINUX_COMPILE([build/conftest], [$2], [$3], [$4], [], [])
 849 ])
 850
 851 dnl #
 852 dnl # ZFS_LINUX_TRY_COMPILE
 853 dnl #
 854 dnl # $1 - global
 855 dnl # $2 - source
 856 dnl # $3 - run on success (valid .ko generated)
 857 dnl # $4 - run on failure (unable to compile)
 858 dnl #
 859 dnl # When configuring as builtin (--enable-linux-builtin) for kernels
 860 dnl # without loadable module support (CONFIG_MODULES=n) only the object
 861 dnl # file is created.  See ZFS_LINUX_TEST_COMPILE_ALL for details.
 862 dnl #
 863 AC_DEFUN([ZFS_LINUX_TRY_COMPILE], [
 864         AS_IF([test "x$enable_linux_builtin" = "xyes"], [
 865                 ZFS_LINUX_COMPILE_IFELSE(
 866                     [ZFS_LINUX_TEST_PROGRAM([[$1]], [[$2]],
 867                     [[ZFS_META_LICENSE]])],
 868                     [test -f build/conftest/conftest.o], [$3], [$4])
 869         ], [
 870                 ZFS_LINUX_COMPILE_IFELSE(
 871                     [ZFS_LINUX_TEST_PROGRAM([[$1]], [[$2]],
 872                     [[ZFS_META_LICENSE]])],
 873                     [test -f build/conftest/conftest.ko], [$3], [$4])
 874         ])
 875 ])
 876
 877 dnl #
 878 dnl # ZFS_CHECK_SYMBOL_EXPORT
 879 dnl #
 880 dnl # Check if a symbol is exported on not by consulting the symbols
 881 dnl # file, or optionally the source code.
 882 dnl #
 883 AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT], [
 884         grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
 885                 $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
 886         rc=$?
 887         if test $rc -ne 0; then
 888                 export=0
 889                 for file in $2; do
 890                         grep -q -E "EXPORT_SYMBOL.*($1)" \
 891                                 "$LINUX/$file" 2>/dev/null
 892                         rc=$?
 893                         if test $rc -eq 0; then
 894                                 export=1
 895                                 break;
 896                         fi
 897                 done
 898                 if test $export -eq 0; then :
 899                         $4
 900                 else :
 901                         $3
 902                 fi
 903         else :
 904                 $3
 905         fi
 906 ])
 907
 908 dnl #
 909 dnl # ZFS_LINUX_TRY_COMPILE_SYMBOL
 910 dnl #
 911 dnl # Like ZFS_LINUX_TRY_COMPILER except ZFS_CHECK_SYMBOL_EXPORT is called
 912 dnl # to verify symbol exports, unless --enable-linux-builtin was provided
 913 dnl # to configure.
 914 dnl #
 915 AC_DEFUN([ZFS_LINUX_TRY_COMPILE_SYMBOL], [
 916         ZFS_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1])
 917         if test $rc -ne 0; then :
 918                 $6
 919         else
 920                 if test "x$enable_linux_builtin" != xyes; then
 921                         ZFS_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1])
 922                 fi
 923                 if test $rc -ne 0; then :
 924                         $6
 925                 else :
 926                         $5
 927                 fi
 928         fi
 929 ])
 930
 931 dnl #
 932 dnl # ZFS_LINUX_TRY_COMPILE_HEADER
 933 dnl # like ZFS_LINUX_TRY_COMPILE, except the contents conftest.h are
 934 dnl # provided via the fifth parameter
 935 dnl #
 936 AC_DEFUN([ZFS_LINUX_TRY_COMPILE_HEADER], [
 937         ZFS_LINUX_COMPILE_IFELSE(
 938             [ZFS_LINUX_TEST_PROGRAM([[$1]], [[$2]], [[ZFS_META_LICENSE]])],
 939             [test -f build/conftest/conftest.ko],
 940             [$3], [$4], [$5])
 941 ])