Fix arc_adapt() spinning in iterate_supers_type()
[zfs.git] / config / kernel.m4
index 8d8cd6b..8742bc5 100644 (file)
@@ -7,14 +7,16 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
        ZFS_AC_TEST_MODULE
        ZFS_AC_KERNEL_CONFIG
        ZFS_AC_KERNEL_BDEV_BLOCK_DEVICE_OPERATIONS
+       ZFS_AC_KERNEL_BLOCK_DEVICE_OPERATIONS_RELEASE_VOID
        ZFS_AC_KERNEL_TYPE_FMODE_T
        ZFS_AC_KERNEL_KOBJ_NAME_LEN
        ZFS_AC_KERNEL_3ARG_BLKDEV_GET
        ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH
        ZFS_AC_KERNEL_OPEN_BDEV_EXCLUSIVE
+       ZFS_AC_KERNEL_LOOKUP_BDEV
        ZFS_AC_KERNEL_INVALIDATE_BDEV_ARGS
        ZFS_AC_KERNEL_BDEV_LOGICAL_BLOCK_SIZE
-       ZFS_AC_KERNEL_BIO_EMPTY_BARRIER
+       ZFS_AC_KERNEL_BDEV_PHYSICAL_BLOCK_SIZE
        ZFS_AC_KERNEL_BIO_FAILFAST
        ZFS_AC_KERNEL_BIO_FAILFAST_DTD
        ZFS_AC_KERNEL_REQ_FAILFAST_MASK
@@ -46,12 +48,14 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
        ZFS_AC_KERNEL_SHOW_OPTIONS
        ZFS_AC_KERNEL_FSYNC
        ZFS_AC_KERNEL_EVICT_INODE
+       ZFS_AC_KERNEL_DIRTY_INODE_WITH_FLAGS
        ZFS_AC_KERNEL_NR_CACHED_OBJECTS
        ZFS_AC_KERNEL_FREE_CACHED_OBJECTS
        ZFS_AC_KERNEL_FALLOCATE
+       ZFS_AC_KERNEL_MKDIR_UMODE_T
        ZFS_AC_KERNEL_LOOKUP_NAMEIDATA
+       ZFS_AC_KERNEL_CREATE_NAMEIDATA
        ZFS_AC_KERNEL_TRUNCATE_RANGE
-       ZFS_AC_KERNEL_CREATE_UMODE_T
        ZFS_AC_KERNEL_AUTOMOUNT
        ZFS_AC_KERNEL_ENCODE_FH_WITH_INODE
        ZFS_AC_KERNEL_COMMIT_METADATA
@@ -59,17 +63,23 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
        ZFS_AC_KERNEL_INSERT_INODE_LOCKED
        ZFS_AC_KERNEL_D_MAKE_ROOT
        ZFS_AC_KERNEL_D_OBTAIN_ALIAS
+       ZFS_AC_KERNEL_D_SET_D_OP
+       ZFS_AC_KERNEL_D_REVALIDATE_NAMEIDATA
+       ZFS_AC_KERNEL_CONST_DENTRY_OPERATIONS
        ZFS_AC_KERNEL_CHECK_DISK_SIZE_CHANGE
        ZFS_AC_KERNEL_TRUNCATE_SETSIZE
        ZFS_AC_KERNEL_6ARGS_SECURITY_INODE_INIT_SECURITY
        ZFS_AC_KERNEL_CALLBACK_SECURITY_INODE_INIT_SECURITY
        ZFS_AC_KERNEL_MOUNT_NODEV
        ZFS_AC_KERNEL_SHRINK
+       ZFS_AC_KERNEL_S_INSTANCES_LIST_HEAD
+       ZFS_AC_KERNEL_S_D_OP
        ZFS_AC_KERNEL_BDI
        ZFS_AC_KERNEL_BDI_SETUP_AND_REGISTER
        ZFS_AC_KERNEL_SET_NLINK
        ZFS_AC_KERNEL_ELEVATOR_CHANGE
        ZFS_AC_KERNEL_5ARG_SGET
+       ZFS_AC_KERNEL_LSEEK_EXECUTE
 
        AS_IF([test "$LINUX_OBJ" != "$LINUX"], [
                KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
@@ -102,7 +112,7 @@ AC_DEFUN([ZFS_AC_MODULE_SYMVERS], [
                AS_IF([test ! -f "$LINUX_OBJ/$LINUX_SYMBOLS"], [
                        AC_MSG_ERROR([
        *** Please make sure the kernel devel package for your distribution
-       *** is installed.  If your building with a custom kernel make sure the
+       *** is installed.  If you are building with a custom kernel, make sure the
        *** kernel is configured, built, and the '--with-linux=PATH' configure
        *** option refers to the location of the kernel source.])
                ])
@@ -144,11 +154,7 @@ AC_DEFUN([ZFS_AC_KERNEL], [
                AS_IF([test -n "$sourcelink" && test -e ${sourcelink}], [
                        kernelsrc=`readlink -f ${sourcelink}`
                ], [
-                       AC_MSG_RESULT([Not found])
-                       AC_MSG_ERROR([
-       *** Please make sure the kernel devel package for your distribution
-       *** is installed then try again.  If that fails you can specify the
-       *** location of the kernel source with the '--with-linux=PATH' option.])
+                       kernelsrc="[Not found]"
                ])
        ], [
                AS_IF([test "$kernelsrc" = "NONE"], [
@@ -157,6 +163,13 @@ AC_DEFUN([ZFS_AC_KERNEL], [
        ])
 
        AC_MSG_RESULT([$kernelsrc])
+       AS_IF([test ! -d "$kernelsrc"], [
+               AC_MSG_ERROR([
+       *** Please make sure the kernel devel package for your distribution
+       *** is installed and then try again.  If that fails, you can specify the
+       *** location of the kernel source with the '--with-linux=PATH' option.])
+       ])
+
        AC_MSG_CHECKING([kernel build directory])
        AS_IF([test -z "$kernelbuild"], [
                AS_IF([test -e "/lib/modules/$(uname -r)/build"], [
@@ -219,54 +232,6 @@ AC_DEFUN([ZFS_AC_KERNEL], [
        ZFS_AC_MODULE_SYMVERS
 ])
 
-dnl #
-dnl # Detect name used for the additional SPL Module.symvers file.  If one
-dnl # does not exist this is likely because the SPL has been configured
-dnl # but not built.  The '--with-spl-timeout' option can be passed
-dnl # to pause here, waiting for the file to appear from a concurrently
-dnl # building SPL package.  If the file does not appear in time, a good
-dnl # guess is made as to what this file will be named based on what it
-dnl # is named in the kernel build products.  This file will first be
-dnl # used at link time so if the guess is wrong the build will fail
-dnl # then.  This unfortunately means the ZFS package does not contain a
-dnl # reliable mechanism to detect symbols exported by the SPL at
-dnl # configure time.
-dnl #
-AC_DEFUN([ZFS_AC_SPL_MODULE_SYMVERS], [
-       AC_ARG_WITH([spl-timeout],
-               AS_HELP_STRING([--with-spl-timeout=SECS],
-               [Wait SECS for symvers file to appear  @<:@default=0@:>@]),
-               [timeout="$withval"], [timeout=0])
-
-       AC_MSG_CHECKING([spl file name for module symbols])
-       SPL_SYMBOLS=NONE
-
-       while true; do
-               AS_IF([test -r $SPL_OBJ/Module.symvers], [
-                       SPL_SYMBOLS=Module.symvers
-               ], [test -r $SPL_OBJ/Modules.symvers], [
-                       SPL_SYMBOLS=Modules.symvers
-               ], [test -r $SPL_OBJ/module/Module.symvers], [
-                       SPL_SYMBOLS=Module.symvers
-               ], [test -r $SPL_OBJ/module/Modules.symvers], [
-                       SPL_SYMBOLS=Modules.symvers
-               ])
-
-               AS_IF([test $SPL_SYMBOLS != NONE -o $timeout -le 0], [
-                       break;
-               ], [
-                       sleep 1
-                       timeout=$((timeout-1))
-               ])
-       done
-
-       AS_IF([test "$SPL_SYMBOLS" = NONE], [
-               SPL_SYMBOLS=$LINUX_SYMBOLS
-       ])
-
-       AC_MSG_RESULT([$SPL_SYMBOLS])
-       AC_SUBST(SPL_SYMBOLS)
-])
 
 dnl #
 dnl # Detect the SPL module to be built against
@@ -282,45 +247,35 @@ AC_DEFUN([ZFS_AC_SPL], [
                [Path to spl build objects]),
                [splbuild="$withval"])
 
+       AC_ARG_WITH([spl-timeout],
+               AS_HELP_STRING([--with-spl-timeout=SECS],
+               [Wait SECS for SPL header and symver file @<:@default=0@:>@]),
+               [timeout="$withval"], [timeout=0])
 
-       AC_MSG_CHECKING([spl source directory])
-       AS_IF([test -z "$splsrc"], [
-               dnl #
-               dnl # Look in the standard development package location
-               dnl #
-               sourcelink=`ls -1d /usr/src/spl-*/${LINUX_VERSION} \
-                           2>/dev/null | tail -1`
-
-               dnl #
-               dnl # Look in the DKMS source location
-               dnl #
-               AS_IF([test -z "$sourcelink" || test ! -e $sourcelink/spl_config.h], [
-                       sourcelink=`ls -1d /var/lib/dkms/spl/*/build \
-                                   2>/dev/null | tail -1`
-               ])
-
-               dnl #
-               dnl # Look in the parent directory
-               dnl #
-               AS_IF([test -z "$sourcelink" || test ! -e $sourcelink/spl_config.h], [
-                       sourcelink=../spl
-               ])
-
-               dnl #
-               dnl # Look in the kernel directory
-               dnl #
-               AS_IF([test -z "$sourcelink" || test ! -e $sourcelink/spl_config.h], [
-                       sourcelink="$LINUX"
-               ])
+       dnl #
+       dnl # The existence of spl.release.in is used to identify a valid
+       dnl # source directory.  In order of preference:
+       dnl #
+       splsrc0="/var/lib/dkms/spl/${VERSION}/build"
+       splsrc1="/usr/src/spl-${VERSION}/${LINUX_VERSION}"
+       splsrc2="/usr/src/spl-${VERSION}"
+       splsrc3="../spl/"
+       splsrc4="$LINUX"
 
-               AS_IF([test -e $sourcelink/spl_config.h], [
-                       splsrc=`readlink -f ${sourcelink}`
+       AC_MSG_CHECKING([spl source directory])
+       AS_IF([test -z "${splsrc}"], [
+               AS_IF([ test -e "${splsrc0}/spl.release.in"], [
+                       splsrc=${splsrc0}
+               ], [ test -e "${splsrc1}/spl.release.in"], [
+                       splsrc=${splsrc1}
+               ], [ test -e "${splsrc2}/spl.release.in"], [
+                       splsrc=${splsrc2}
+               ], [ test -e "${splsrc3}/spl.release.in"], [
+                       splsrc=$(readlink -f "${splsrc3}")
+               ], [ test -e "${splsrc4}/spl.release.in" ], [
+                       splsrc=${splsrc4}
                ], [
-                       AC_MSG_RESULT([Not found])
-                       AC_MSG_ERROR([
-       *** Please make sure the spl devel package for your distribution
-       *** is installed then try again.  If that fails you can specify the
-       *** location of the spl source with the '--with-spl=PATH' option.])
+                       splsrc="[Not found]"
                ])
        ], [
                AS_IF([test "$splsrc" = "NONE"], [
@@ -330,11 +285,52 @@ AC_DEFUN([ZFS_AC_SPL], [
        ])
 
        AC_MSG_RESULT([$splsrc])
-       AC_MSG_CHECKING([spl build directory])
-       AS_IF([test -z "$splbuild"], [
-               splbuild=${splsrc}
+       AS_IF([ test ! -e "$splsrc/spl.release.in"], [
+               AC_MSG_ERROR([
+       *** Please make sure the kmod spl devel package for your distribution
+       *** is installed then try again.  If that fails you can specify the
+       *** location of the spl source with the '--with-spl=PATH' option.])
        ])
+
+       dnl #
+       dnl # The existence of the spl_config.h is used to identify a valid
+       dnl # spl object directory.  In many cases the object and source
+       dnl # directory are the same, however the objects may also reside
+       dnl # is a subdirectory named after the kernel version.
+       dnl #
+       dnl # This file is supposed to be available after DKMS finishes
+       dnl # building the SPL kernel module for the target kernel.  The
+       dnl # '--with-spl-timeout' option can be passed to pause here,
+       dnl # waiting for the file to appear from a concurrently building
+       dnl # SPL package.
+       dnl #
+       AC_MSG_CHECKING([spl build directory])
+       while true; do
+               AS_IF([test -z "$splbuild"], [
+                       AS_IF([ test -e "${splsrc}/${LINUX_VERSION}/spl_config.h" ], [
+                               splbuild="${splsrc}/${LINUX_VERSION}"
+                       ], [ test -e "${splsrc}/spl_config.h" ], [
+                               splbuild="${splsrc}"
+                       ], [
+                               splbuild="[Not found]"
+                       ])
+               ])
+               AS_IF([test -e "$splbuild/spl_config.h" -o $timeout -le 0], [
+                       break;
+               ], [
+                       sleep 1
+                       timeout=$((timeout-1))
+               ])
+       done
+
        AC_MSG_RESULT([$splbuild])
+       AS_IF([ ! test -e "$splbuild/spl_config.h"], [
+               AC_MSG_ERROR([
+       *** Please make sure the kmod spl devel <kernel> package for your
+       *** distribution is installed then try again.  If that fails you
+       *** can specify the location of the spl objects with the
+       *** '--with-spl-obj=PATH' option.])
+       ])
 
        AC_MSG_CHECKING([spl source version])
        AS_IF([test -r $splbuild/spl_config.h &&
@@ -363,7 +359,47 @@ AC_DEFUN([ZFS_AC_SPL], [
        AC_SUBST(SPL_OBJ)
        AC_SUBST(SPL_VERSION)
 
-       ZFS_AC_SPL_MODULE_SYMVERS
+       dnl #
+       dnl # Detect the name used for the SPL Module.symvers file.  If one
+       dnl # does not exist this is likely because the SPL has been configured
+       dnl # but not built.  The '--with-spl-timeout' option can be passed
+       dnl # to pause here, waiting for the file to appear from a concurrently
+       dnl # building SPL package.  If the file does not appear in time, a good
+       dnl # guess is made as to what this file will be named based on what it
+       dnl # is named in the kernel build products.  This file will first be
+       dnl # used at link time so if the guess is wrong the build will fail
+       dnl # then.  This unfortunately means the ZFS package does not contain a
+       dnl # reliable mechanism to detect symbols exported by the SPL at
+       dnl # configure time.
+       dnl #
+       AC_MSG_CHECKING([spl file name for module symbols])
+       SPL_SYMBOLS=NONE
+
+       while true; do
+               AS_IF([test -r $SPL_OBJ/Module.symvers], [
+                       SPL_SYMBOLS=Module.symvers
+               ], [test -r $SPL_OBJ/Modules.symvers], [
+                       SPL_SYMBOLS=Modules.symvers
+               ], [test -r $SPL_OBJ/module/Module.symvers], [
+                       SPL_SYMBOLS=Module.symvers
+               ], [test -r $SPL_OBJ/module/Modules.symvers], [
+                       SPL_SYMBOLS=Modules.symvers
+               ])
+
+               AS_IF([test $SPL_SYMBOLS != NONE -o $timeout -le 0], [
+                       break;
+               ], [
+                       sleep 1
+                       timeout=$((timeout-1))
+               ])
+       done
+
+       AS_IF([test "$SPL_SYMBOLS" = NONE], [
+               SPL_SYMBOLS=$LINUX_SYMBOLS
+       ])
+
+       AC_MSG_RESULT([$SPL_SYMBOLS])
+       AC_SUBST(SPL_SYMBOLS)
 ])
 
 dnl #
@@ -477,7 +513,7 @@ AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [
        modpost_flag=''
        test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
        AS_IF(
-               [AC_TRY_COMMAND(cp conftest.c build && make [$2] -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag) >/dev/null && AC_TRY_COMMAND([$3])],
+               [AC_TRY_COMMAND(cp conftest.c build && make [$2] -C $LINUX_OBJ EXTRA_CFLAGS="-Werror $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag) >/dev/null && AC_TRY_COMMAND([$3])],
                [$4],
                [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
        )