+])
+
+#
+# LC_TARGET_SUPPORTED
+#
+# is the target os supported?
+#
+AC_DEFUN([LC_TARGET_SUPPORTED],
+[case $target_os in
+ linux* | darwin*)
+$1
+ ;;
+ *)
+$2
+ ;;
+esac
+])
+
+#
+# LC_CONFIG_OBD_BUFFER_SIZE
+#
+# the maximum buffer size of lctl ioctls
+#
+AC_DEFUN([LC_CONFIG_OBD_BUFFER_SIZE],
+[AC_MSG_CHECKING([maximum OBD ioctl size])
+AC_ARG_WITH([obd-buffer-size],
+ AC_HELP_STRING([--with-obd-buffer-size=[size]],
+ [set lctl ioctl maximum bytes (default=8192)]),
+ [
+ OBD_BUFFER_SIZE=$with_obd_buffer_size
+ ],[
+ OBD_BUFFER_SIZE=8192
+ ])
+AC_MSG_RESULT([$OBD_BUFFER_SIZE bytes])
+AC_DEFINE_UNQUOTED(OBD_MAX_IOCTL_BUFFER, $OBD_BUFFER_SIZE, [IOCTL Buffer Size])
+])
+
+#
+# LC_READLINK_SSIZE_T
+#
+AC_DEFUN([LC_READLINK_SSIZE_T],
+[AC_MSG_CHECKING([if readlink returns ssize_t])
+AC_TRY_COMPILE([
+ #include <unistd.h>
+],[
+ ssize_t readlink(const char *, char *, size_t);
+],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_POSIX_1003_READLINK, 1, [readlink returns ssize_t])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+#
+# LC_FUNC_RELEASEPAGE_WITH_GFP
+#
+# 2.6.9 ->releasepage() takes a gfp_t arg
+# This kernel defines gfp_t (HAS_GFP_T) but doesn't use it for this function,
+# while others either don't have gfp_t or pass gfp_t as the parameter.
+#
+AC_DEFUN([LC_FUNC_RELEASEPAGE_WITH_GFP],
+[AC_MSG_CHECKING([if releasepage has a gfp_t parameter])
+RELEASEPAGE_WITH_GFP="$(grep -c 'releasepage.*gfp_t' $LINUX/include/linux/fs.h)"
+if test "$RELEASEPAGE_WITH_GFP" != 0 ; then
+ AC_DEFINE(HAVE_RELEASEPAGE_WITH_GFP, 1,
+ [releasepage with gfp_t parameter])
+ AC_MSG_RESULT([yes])
+else
+ AC_MSG_RESULT([no])
+fi
+])
+
+
+
+#
+# only for Lustre-patched kernels
+#
+AC_DEFUN([LC_LUSTRE_VERSION_H],
+[LB_CHECK_FILE([$LINUX/include/linux/lustre_version.h],[
+ rm -f "$LUSTRE/include/linux/lustre_version.h"
+],[
+ touch "$LUSTRE/include/linux/lustre_version.h"
+ if test x$enable_server = xyes ; then
+ AC_MSG_WARN([Unpatched kernel detected.])
+ AC_MSG_WARN([Lustre servers cannot be built with an unpatched kernel;])
+ AC_MSG_WARN([disabling server build])
+ enable_server='no'
+ fi
+])
+])
+
+#
+# LC_FUNC_DEV_SET_RDONLY
+#
+# check for the old-style dev_set_rdonly which took an extra "devno" param
+# and can only set a single device to discard writes at one time
+#
+AC_DEFUN([LC_FUNC_DEV_SET_RDONLY],
+[AC_MSG_CHECKING([if kernel has new dev_set_rdonly])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+ #include <linux/blkdev.h>
+],[
+ #ifndef HAVE_CLEAR_RDONLY_ON_PUT
+ #error needs to be patched by lustre kernel patches from Lustre version 1.4.3 or above.
+ #endif
+],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_DEV_SET_RDONLY, 1, [kernel has new dev_set_rdonly])
+],[
+ AC_MSG_ERROR([no, Linux kernel source needs to be patches by lustre
+kernel patches from Lustre version 1.4.3 or above.])
+])
+])
+
+#
+# Ensure stack size big than 8k in Lustre server (all kernels)
+#
+AC_DEFUN([LC_STACK_SIZE],
+[AC_MSG_CHECKING([stack size big than 8k])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/thread_info.h>
+],[
+ #if THREAD_SIZE < 8192
+ #error "stack size < 8192"
+ #endif
+],[
+ AC_MSG_RESULT(yes)
+],[
+ AC_MSG_ERROR([Lustre requires that Linux is configured with at least a 8KB stack.])
+])
+])
+
+#
+# Allow the user to set the MDS thread upper limit
+#
+AC_DEFUN([LC_MDS_MAX_THREADS],
+[
+ AC_ARG_WITH([mds_max_threads],
+ AC_HELP_STRING([--with-mds-max-threads=size],
+ [define the maximum number of threads available on the MDS: (default=512)]),
+ [
+ MDS_THREAD_COUNT=$with_mds_max_threads
+ AC_DEFINE_UNQUOTED(MDT_MAX_THREADS, $MDS_THREAD_COUNT, [maximum number of mdt threads])
+ ])
+])
+
+#
+# LC_CONFIG_PINGER
+#
+# the pinger is temporary, until we have the recovery node in place
+#
+AC_DEFUN([LC_CONFIG_PINGER],
+[AC_MSG_CHECKING([whether to enable pinger support])
+AC_ARG_ENABLE([pinger],
+ AC_HELP_STRING([--disable-pinger],
+ [disable recovery pinger support]),
+ [],[enable_pinger='yes'])
+AC_MSG_RESULT([$enable_pinger])
+if test x$enable_pinger != xno ; then
+ AC_DEFINE(ENABLE_PINGER, 1, Use the Pinger)
+fi
+])
+
+#
+# LC_CONFIG_CHECKSUM
+#
+# do checksum of bulk data between client and OST
+#
+AC_DEFUN([LC_CONFIG_CHECKSUM],
+[AC_MSG_CHECKING([whether to enable data checksum support])
+AC_ARG_ENABLE([checksum],
+ AC_HELP_STRING([--disable-checksum],
+ [disable data checksum support]),
+ [],[enable_checksum='yes'])
+AC_MSG_RESULT([$enable_checksum])
+if test x$enable_checksum != xno ; then
+ AC_DEFINE(ENABLE_CHECKSUM, 1, do data checksums)
+fi
+])
+
+#
+# LC_CONFIG_LIBLUSTRE_RECOVERY
+#
+AC_DEFUN([LC_CONFIG_LIBLUSTRE_RECOVERY],
+[AC_MSG_CHECKING([whether to enable liblustre recovery support])
+AC_ARG_ENABLE([liblustre-recovery],
+ AC_HELP_STRING([--disable-liblustre-recovery],
+ [disable liblustre recovery support]),
+ [],[enable_liblustre_recovery='yes'])
+AC_MSG_RESULT([$enable_liblustre_recovery])
+if test x$enable_liblustre_recovery != xno ; then
+ AC_DEFINE(ENABLE_LIBLUSTRE_RECOVERY, 1, Liblustre Can Recover)
+fi
+])
+
+#
+# LC_CONFIG_HEALTH_CHECK_WRITE
+#
+# Turn off the actual write to the disk
+#
+AC_DEFUN([LC_CONFIG_HEALTH_CHECK_WRITE],
+[AC_MSG_CHECKING([whether to enable a write with the health check])
+AC_ARG_ENABLE([health_write],
+ AC_HELP_STRING([--enable-health_write],
+ [enable disk writes when doing health check]),
+ [],[enable_health_write='no'])
+AC_MSG_RESULT([$enable_health_write])
+if test x$enable_health_write != xno ; then
+ AC_DEFINE(USE_HEALTH_CHECK_WRITE, 1, Write when Checking Health)
+fi
+])
+
+AC_DEFUN([LC_CONFIG_LRU_RESIZE],
+[AC_MSG_CHECKING([whether to enable lru self-adjusting])
+AC_ARG_ENABLE([lru_resize],
+ AC_HELP_STRING([--enable-lru-resize],
+ [enable lru resize support]),
+ [],[enable_lru_resize='yes'])
+AC_MSG_RESULT([$enable_lru_resize])
+if test x$enable_lru_resize != xno; then
+ AC_DEFINE(HAVE_LRU_RESIZE_SUPPORT, 1, [Enable lru resize support])
+fi
+])
+
+# whether to enable quota support(kernel modules)
+AC_DEFUN([LC_QUOTA_MODULE],
+[if test x$enable_quota != xno; then
+ LB_LINUX_CONFIG([QUOTA],[
+ enable_quota_module='yes'
+ AC_DEFINE(HAVE_QUOTA_SUPPORT, 1, [Enable quota support])
+ ],[
+ enable_quota_module='no'
+ AC_MSG_WARN([quota is not enabled because the kernel - lacks quota support])
+ ])
+fi
+])
+
+# truncate_complete_page() was exported from RHEL5/SLES10/SLES11
+# remove_from_page_cache() was exported between 2.6.35 and 2.6.38
+# delete_from_page_cache() is exported from 2.6.39
+AC_DEFUN([LC_EXPORT_TRUNCATE_COMPLETE],
+ [LB_CHECK_SYMBOL_EXPORT([truncate_complete_page],
+ [mm/truncate.c],
+ [AC_DEFINE(HAVE_TRUNCATE_COMPLETE_PAGE, 1,
+ [kernel export truncate_complete_page])])
+ LB_CHECK_SYMBOL_EXPORT([remove_from_page_cache],
+ [mm/filemap.c],
+ [AC_DEFINE(HAVE_REMOVE_FROM_PAGE_CACHE, 1,
+ [kernel export remove_from_page_cache])])
+ LB_CHECK_SYMBOL_EXPORT([delete_from_page_cache],
+ [mm/filemap.c],
+ [AC_DEFINE(HAVE_DELETE_FROM_PAGE_CACHE, 1,
+ [kernel export delete_from_page_cache])])
+ ])
+
+AC_DEFUN([LC_EXPORT_TRUNCATE_RANGE],
+[LB_CHECK_SYMBOL_EXPORT([truncate_inode_pages_range],
+[mm/truncate.c],[
+AC_DEFINE(HAVE_TRUNCATE_RANGE, 1,
+ [kernel export truncate_inode_pages_range])
+],[
+])
+])
+
+AC_DEFUN([LC_EXPORT_D_REHASH_COND],
+[LB_CHECK_SYMBOL_EXPORT([d_rehash_cond],
+[fs/dcache.c],[
+AC_DEFINE(HAVE_D_REHASH_COND, 1,
+ [d_rehash_cond is exported by the kernel])
+],[
+])
+])
+
+AC_DEFUN([LC_EXPORT___D_REHASH],
+[LB_CHECK_SYMBOL_EXPORT([__d_rehash],
+[fs/dcache.c],[
+AC_DEFINE(HAVE___D_REHASH, 1,
+ [__d_rehash is exported by the kernel])
+],[
+])
+])
+
+# The actual symbol exported varies among architectures, so we need
+# to check many symbols (but only in the current architecture.) No
+# matter what symbol is exported, the kernel #defines node_to_cpumask
+# to the appropriate function and that's what we use.
+AC_DEFUN([LC_EXPORT_NODE_TO_CPUMASK],
+ [LB_CHECK_SYMBOL_EXPORT([node_to_cpumask],
+ [arch/$LINUX_ARCH/mm/numa.c],
+ [AC_DEFINE(HAVE_NODE_TO_CPUMASK, 1,
+ [node_to_cpumask is exported by
+ the kernel])]) # x86_64
+ LB_CHECK_SYMBOL_EXPORT([node_to_cpu_mask],
+ [arch/$LINUX_ARCH/kernel/smpboot.c],
+ [AC_DEFINE(HAVE_NODE_TO_CPUMASK, 1,
+ [node_to_cpumask is exported by
+ the kernel])]) # ia64
+ LB_CHECK_SYMBOL_EXPORT([node_2_cpu_mask],
+ [arch/$LINUX_ARCH/kernel/smpboot.c],
+ [AC_DEFINE(HAVE_NODE_TO_CPUMASK, 1,
+ [node_to_cpumask is exported by
+ the kernel])]) # i386
+ ])
+
+#
+# LC_FUNC_GRAB_CACHE_PAGE_NOWAIT_GFP
+#
+# Check for our patched grab_cache_page_nowait_gfp() function
+# after 2.6.29 we can emulate this using add_to_page_cache_lru()
+#
+AC_DEFUN([LC_FUNC_GRAB_CACHE_PAGE_NOWAIT_GFP],
+[LB_CHECK_SYMBOL_EXPORT([grab_cache_page_nowait_gfp],
+[mm/filemap.c],[
+ AC_DEFINE(HAVE_GRAB_CACHE_PAGE_NOWAIT_GFP, 1,
+ [kernel exports grab_cache_page_nowait_gfp])
+ ],
+ [LB_CHECK_SYMBOL_EXPORT([add_to_page_cache_lru],
+ [mm/filemap.c],[
+ AC_DEFINE(HAVE_ADD_TO_PAGE_CACHE_LRU, 1,
+ [kernel exports add_to_page_cache_lru])
+ ],[
+ ])
+ ])
+])
+
+#
+# LC_STRUCT_STATFS
+#
+# AIX does not have statfs.f_namelen
+#
+AC_DEFUN([LC_STRUCT_STATFS],
+[AC_MSG_CHECKING([if struct statfs has a f_namelen field])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/vfs.h>
+],[
+ struct statfs sfs;
+ sfs.f_namelen = 1;
+],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_STATFS_NAMELEN, 1, [struct statfs has a namelen field])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+#
+# between 2.6.5 - 2.6.22 filemap_populate is exported in some kernels
+#
+AC_DEFUN([LC_FILEMAP_POPULATE],
+[AC_MSG_CHECKING([for exported filemap_populate])
+LB_LINUX_TRY_COMPILE([
+ #include <asm/page.h>
+ #include <linux/mm.h>
+],[
+ filemap_populate(NULL, 0, 0, __pgprot(0), 0, 0);
+],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_FILEMAP_POPULATE, 1, [Kernel exports filemap_populate])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+#
+# added in 2.6.15
+#
+AC_DEFUN([LC_D_ADD_UNIQUE],
+[AC_MSG_CHECKING([for d_add_unique])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/dcache.h>
+],[
+ d_add_unique(NULL, NULL);
+],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_D_ADD_UNIQUE, 1, [Kernel has d_add_unique])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+#
+# added in 2.6.17
+#
+AC_DEFUN([LC_BIT_SPINLOCK_H],
+[LB_CHECK_FILE([$LINUX/include/linux/bit_spinlock.h],[
+ AC_MSG_CHECKING([if bit_spinlock.h can be compiled])
+ LB_LINUX_TRY_COMPILE([
+ #include <asm/processor.h>
+ #include <linux/spinlock.h>
+ #include <linux/bit_spinlock.h>
+ ],[],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_BIT_SPINLOCK_H, 1, [Kernel has bit_spinlock.h])
+ ],[
+ AC_MSG_RESULT([no])
+ ])
+],
+[])
+])
+
+#
+# After 2.6.26 we no longer have xattr_acl.h
+#
+AC_DEFUN([LC_XATTR_ACL],
+[LB_CHECK_FILE([$LINUX/include/linux/xattr_acl.h],[
+ AC_MSG_CHECKING([if xattr_acl.h can be compiled])
+ LB_LINUX_TRY_COMPILE([
+ #include <linux/xattr_acl.h>
+ ],[],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_XATTR_ACL, 1, [Kernel has xattr_acl])
+ ],[
+ AC_MSG_RESULT([no])
+ ])
+],
+[])
+])
+
+#
+# After 2.6.16 the xattr_acl API is removed, and posix_acl is used instead
+#
+AC_DEFUN([LC_POSIX_ACL_XATTR_H],
+[LB_CHECK_FILE([$LINUX/include/linux/posix_acl_xattr.h],[
+ AC_MSG_CHECKING([if linux/posix_acl_xattr.h can be compiled])
+ LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+ #include <linux/posix_acl_xattr.h>
+ ],[],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_LINUX_POSIX_ACL_XATTR_H, 1, [linux/posix_acl_xattr.h found])
+
+ ],[
+ AC_MSG_RESULT([no])
+ ])
+$1
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+AC_DEFUN([LC_CONST_ACL_SIZE],
+[AC_MSG_CHECKING([calc acl size])
+tmp_flags="$CFLAGS"
+CFLAGS="$CFLAGS -I$LINUX/include -I$LINUX_OBJ/include -I$LINUX_OBJ/include2 -I$LINUX/arch/`uname -m|sed -e 's/ppc.*/powerpc/' -e 's/x86_64/x86/' -e 's/i.86/x86/'`/include -include $AUTOCONF_HDIR/autoconf.h $EXTRA_KCFLAGS"
+AC_TRY_RUN([
+ #define __KERNEL__
+ #include <linux/types.h>
+ #undef __KERNEL__
+ // block include
+ #define __LINUX_POSIX_ACL_H
+
+ # ifdef CONFIG_FS_POSIX_ACL
+ # ifdef HAVE_XATTR_ACL
+ # include <linux/xattr_acl.h>
+ # endif
+ # ifdef HAVE_LINUX_POSIX_ACL_XATTR_H
+ # include <linux/posix_acl_xattr.h>
+ # endif
+ # endif
+
+ #include <lustre_acl.h>
+
+ #include <stdio.h>
+
+ int main(void)
+ {
+ int size = mds_xattr_acl_size(LUSTRE_POSIX_ACL_MAX_ENTRIES);
+ FILE *f = fopen("acl.size","w+");
+ fprintf(f,"%d", size);
+ fclose(f);
+
+ return 0;
+ }
+],[
+ acl_size=`cat acl.size`
+ AC_MSG_RESULT([ACL size $acl_size])
+ AC_DEFINE_UNQUOTED(XATTR_ACL_SIZE, AS_TR_SH([$acl_size]), [size of xattr acl])
+],[
+ AC_ERROR([ACL size can't be computed])
+],[
+ AC_MSG_RESULT([can't check ACL size, make it 260])
+ AC_DEFINE_UNQUOTED(XATTR_ACL_SIZE,260)
+])
+CFLAGS="$tmp_flags"
+])
+
+# added in 2.6.16
+#
+AC_DEFUN([LC_STRUCT_INTENT_FILE],
+[AC_MSG_CHECKING([if struct open_intent has a file field])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+ #include <linux/namei.h>
+],[
+ struct open_intent intent;
+ &intent.file;
+],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_FILE_IN_STRUCT_INTENT, 1, [struct open_intent has a file field])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+#
+# LC_CAPA_CRYPTO
+#
+AC_DEFUN([LC_CAPA_CRYPTO],
+[LB_LINUX_CONFIG_IM([CRYPTO],[],[
+ AC_MSG_ERROR([Lustre capability require that CONFIG_CRYPTO is enabled in your kernel.])
+])
+LB_LINUX_CONFIG_IM([CRYPTO_HMAC],[],[
+ AC_MSG_ERROR([Lustre capability require that CONFIG_CRYPTO_HMAC is enabled in your kernel.])
+])
+LB_LINUX_CONFIG_IM([CRYPTO_SHA1],[],[
+ AC_MSG_ERROR([Lustre capability require that CONFIG_CRYPTO_SHA1 is enabled in your kernel.])
+])
+])
+
+#
+# LC_CONFIG_RMTCLIENT
+#
+dnl FIXME
+dnl the AES symbol usually tied with arch, e.g. CRYPTO_AES_586
+dnl FIXME
+AC_DEFUN([LC_CONFIG_RMTCLIENT],
+[LB_LINUX_CONFIG_IM([CRYPTO_AES],[],[
+ AC_MSG_WARN([Lustre remote client require that CONFIG_CRYPTO_AES is enabled in your kernel.])
+])
+])
+
+#
+# LC_CONFIG_GSS_KEYRING (default enabled, if gss is enabled)
+#
+AC_DEFUN([LC_CONFIG_GSS_KEYRING],
+[AC_MSG_CHECKING([whether to enable gss keyring backend])
+ AC_ARG_ENABLE([gss_keyring],
+ [AC_HELP_STRING([--disable-gss-keyring],
+ [disable gss keyring backend])],
+ [],[enable_gss_keyring='yes'])
+ AC_MSG_RESULT([$enable_gss_keyring])
+
+ if test x$enable_gss_keyring != xno; then
+ LB_LINUX_CONFIG_IM([KEYS],[],
+ [AC_MSG_ERROR([GSS keyring backend require that CONFIG_KEYS be enabled in your kernel.])])
+
+ AC_CHECK_LIB([keyutils], [keyctl_search], [],
+ [AC_MSG_ERROR([libkeyutils is not found, which is required by gss keyring backend])],)
+
+ AC_DEFINE([HAVE_GSS_KEYRING], [1],
+ [Define this if you enable gss keyring backend])
+ fi
+])
+
+AC_DEFUN([LC_SUNRPC_CACHE],
+[AC_MSG_CHECKING([if sunrpc struct cache_head uses kref])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/sunrpc/cache.h>
+],[
+ struct cache_head ch;
+ &ch.ref.refcount;
+],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_SUNRPC_CACHE_V2, 1, [sunrpc cache facility v2])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+AC_DEFUN([LC_CONFIG_SUNRPC],
+[LB_LINUX_CONFIG_IM([SUNRPC],[],
+ [AC_MSG_ERROR([kernel SUNRPC support is required by using GSS.])])
+ LC_SUNRPC_CACHE
+])
+
+#
+# LC_CONFIG_GSS (default disabled)
+#
+# Build gss and related tools of Lustre. Currently both kernel and user space
+# parts are depend on linux platform.
+#
+AC_DEFUN([LC_CONFIG_GSS],
+[AC_MSG_CHECKING([whether to enable gss/krb5 support])
+ AC_ARG_ENABLE([gss],
+ [AC_HELP_STRING([--enable-gss], [enable gss/krb5 support])],
+ [],[enable_gss='no'])
+ AC_MSG_RESULT([$enable_gss])
+
+ if test x$enable_gss == xyes; then
+ LC_CONFIG_GSS_KEYRING
+ LC_CONFIG_SUNRPC
+
+ AC_DEFINE([HAVE_GSS], [1], [Define this if you enable gss])
+
+ LB_LINUX_CONFIG_IM([CRYPTO_MD5],[],
+ [AC_MSG_WARN([kernel MD5 support is recommended by using GSS.])])
+ LB_LINUX_CONFIG_IM([CRYPTO_SHA1],[],
+ [AC_MSG_WARN([kernel SHA1 support is recommended by using GSS.])])
+ LB_LINUX_CONFIG_IM([CRYPTO_SHA256],[],
+ [AC_MSG_WARN([kernel SHA256 support is recommended by using GSS.])])
+ LB_LINUX_CONFIG_IM([CRYPTO_SHA512],[],
+ [AC_MSG_WARN([kernel SHA512 support is recommended by using GSS.])])
+
+ AC_CHECK_LIB([gssapi], [gss_init_sec_context],
+ [GSSAPI_LIBS="$GSSAPI_LDFLAGS -lgssapi"],
+ [AC_CHECK_LIB([gssglue], [gss_init_sec_context],
+ [GSSAPI_LIBS="$GSSAPI_LDFLAGS -lgssglue"],
+ [AC_MSG_ERROR([libgssapi or libgssglue is not found, which is required by GSS.])])],)
+
+ AC_SUBST(GSSAPI_LIBS)
+
+ AC_KERBEROS_V5
+ fi
+])
+
+#
+# LC_FUNC_HAVE_CAN_SLEEP_ARG
+#
+# 2.6.5 kernel has third arg can_sleep in fs/locks.c: flock_lock_file_wait()
+#
+AC_DEFUN([LC_FUNC_HAVE_CAN_SLEEP_ARG],
+[AC_MSG_CHECKING([if kernel has third arg can_sleep in fs/locks.c: flock_lock_file_wait()])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+],[
+ int cansleep;
+ struct file *file;
+ struct file_lock *file_lock;
+ flock_lock_file_wait(file, file_lock, cansleep);
+],[
+ AC_DEFINE(HAVE_CAN_SLEEP_ARG, 1,
+ [kernel has third arg can_sleep in fs/locks.c: flock_lock_file_wait()])
+ AC_MSG_RESULT([yes])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+#
+# LC_FUNC_F_OP_FLOCK
+#
+# rhel4.2 kernel has f_op->flock field
+#
+AC_DEFUN([LC_FUNC_F_OP_FLOCK],
+[AC_MSG_CHECKING([if struct file_operations has flock field])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+],[
+ struct file_operations ll_file_operations_flock;
+ ll_file_operations_flock.flock = NULL;
+],[
+ AC_DEFINE(HAVE_F_OP_FLOCK, 1,
+ [struct file_operations has flock field])
+ AC_MSG_RESULT([yes])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+AC_DEFUN([LC_QUOTA_READ],
+[AC_MSG_CHECKING([if kernel supports quota_read])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+],[
+ struct super_operations sp;
+ void *i = (void *)sp.quota_read;
+],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(KERNEL_SUPPORTS_QUOTA_READ, 1, [quota_read found])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+#
+# LC_COOKIE_FOLLOW_LINK
+#
+# kernel 2.6.13+ ->follow_link returns a cookie
+#
+
+AC_DEFUN([LC_COOKIE_FOLLOW_LINK],
+[AC_MSG_CHECKING([if inode_operations->follow_link returns a cookie])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+ #include <linux/namei.h>
+],[
+ struct dentry dentry;
+ struct nameidata nd;
+
+ dentry.d_inode->i_op->put_link(&dentry, &nd, NULL);
+],[
+ AC_DEFINE(HAVE_COOKIE_FOLLOW_LINK, 1, [inode_operations->follow_link returns a cookie])
+ AC_MSG_RESULT([yes])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+#
+# LC_FUNC_RCU
+#
+# kernels prior than 2.6.0(?) have no RCU supported; in kernel 2.6.5(SUSE),
+# call_rcu takes three parameters.
+#
+AC_DEFUN([LC_FUNC_RCU],
+[AC_MSG_CHECKING([if kernel have RCU supported])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/rcupdate.h>
+],[],[
+ AC_DEFINE(HAVE_RCU, 1, [have RCU defined])
+ AC_MSG_RESULT([yes])
+
+ AC_MSG_CHECKING([if call_rcu takes three parameters])
+ LB_LINUX_TRY_COMPILE([
+ #include <linux/rcupdate.h>
+ ],[
+ struct rcu_head rh;
+ call_rcu(&rh, (void (*)(struct rcu_head *))1, NULL);
+ ],[
+ AC_DEFINE(HAVE_CALL_RCU_PARAM, 1, [call_rcu takes three parameters])
+ AC_MSG_RESULT([yes])
+ ],[
+ AC_MSG_RESULT([no])
+ ])
+
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+AC_DEFUN([LC_PERCPU_COUNTER],
+[AC_MSG_CHECKING([if have struct percpu_counter defined])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/percpu_counter.h>
+],[],[
+ AC_DEFINE(HAVE_PERCPU_COUNTER, 1, [percpu_counter found])
+ AC_MSG_RESULT([yes])
+
+ AC_MSG_CHECKING([if percpu_counter_inc takes the 2nd argument])
+ LB_LINUX_TRY_COMPILE([
+ #include <linux/percpu_counter.h>
+ ],[
+ struct percpu_counter c;
+ percpu_counter_init(&c, 0);
+ ],[
+ AC_DEFINE(HAVE_PERCPU_2ND_ARG, 1, [percpu_counter_init has two
+ arguments])
+ AC_MSG_RESULT([yes])
+ ],[
+ AC_MSG_RESULT([no])
+ ])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+AC_DEFUN([LC_TASK_CLENV_STORE],
+[
+ AC_MSG_CHECKING([if we can store cl_env in task_struct])
+ if test x$have_task_clenv_store != xyes ; then
+ LC_TASK_CLENV_TUX_INFO
+ fi
+])
+
+# ~2.6.11
+
+AC_DEFUN([LC_S_TIME_GRAN],
+[AC_MSG_CHECKING([if super block has s_time_gran member])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+],[
+ struct super_block sb;
+
+ return sb.s_time_gran;
+],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_S_TIME_GRAN, 1, [super block has s_time_gran member])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+AC_DEFUN([LC_SB_TIME_GRAN],
+[AC_MSG_CHECKING([if kernel has old get_sb_time_gran])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+],[
+ return get_sb_time_gran(NULL);
+],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_SB_TIME_GRAN, 1, [kernel has old get_sb_time_gran])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.12
+
+# ~2.6.12 merge patch from oracle to convert tree_lock from spinlock to rwlock
+AC_DEFUN([LC_RW_TREE_LOCK],
+[AC_MSG_CHECKING([if kernel has tree_lock as rwlock])
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+],[
+ struct address_space a;
+
+ write_lock(&a.tree_lock);
+],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_RW_TREE_LOCK, 1, [kernel has tree_lock as rw_lock])
+],[
+ AC_MSG_RESULT([no])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+])
+
+# LC_EXPORT_SYNCHRONIZE_RCU
+# after 2.6.12 synchronize_rcu is preferred over synchronize_kernel
+AC_DEFUN([LC_EXPORT_SYNCHRONIZE_RCU],
+[LB_CHECK_SYMBOL_EXPORT([synchronize_rcu],
+[kernel/rcupdate.c],[
+ AC_DEFINE(HAVE_SYNCHRONIZE_RCU, 1,
+ [in 2.6.12 synchronize_rcu preferred over synchronize_kernel])
+],[
+])
+])
+
+# 2.6.15
+
+# LC_INODE_I_MUTEX
+# after 2.6.15 inode have i_mutex intead of i_sem
+AC_DEFUN([LC_INODE_I_MUTEX],
+[AC_MSG_CHECKING([if inode has i_mutex ])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/mutex.h>
+ #include <linux/fs.h>
+ #undef i_mutex
+],[
+ struct inode i;
+
+ mutex_unlock(&i.i_mutex);
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_INODE_I_MUTEX, 1,
+ [after 2.6.15 inode have i_mutex intead of i_sem])
+],[
+ AC_MSG_RESULT(no)
+])
+])
+
+# 2.6.16
+
+# LC_SECURITY_PLUG # for SLES10 SP2
+# check security plug in sles10 sp2 kernel
+AC_DEFUN([LC_SECURITY_PLUG],
+[AC_MSG_CHECKING([If kernel has security plug support])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+],[
+ struct dentry *dentry;
+ struct vfsmount *mnt;
+ struct iattr *iattr;
+
+ notify_change(dentry, mnt, iattr);
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_SECURITY_PLUG, 1,
+ [SLES10 SP2 use extra parameter in vfs])
+],[
+ AC_MSG_RESULT(no)
+])
+])
+
+# 2.6.17
+
+# inode have i_private field since 2.6.17
+AC_DEFUN([LC_INODE_IPRIVATE],
+[AC_MSG_CHECKING([if inode has a i_private field])
+LB_LINUX_TRY_COMPILE([
+#include <linux/fs.h>
+],[
+ struct inode i;
+ i.i_private = NULL;
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_INODE_IPRIVATE, 1,
+ [struct inode has i_private field])
+],[
+ AC_MSG_RESULT(no)
+])
+])
+
+# LC_DQUOTOFF_MUTEX
+# after 2.6.17 dquote use mutex instead if semaphore
+AC_DEFUN([LC_DQUOTOFF_MUTEX],
+[AC_MSG_CHECKING([use dqonoff_mutex])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/mutex.h>
+ #include <linux/fs.h>
+ #include <linux/quota.h>
+],[
+ struct quota_info dq;
+
+ mutex_unlock(&dq.dqonoff_mutex);
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_DQUOTOFF_MUTEX, 1,
+ [after 2.6.17 dquote use mutex instead if semaphore])
+],[
+ AC_MSG_RESULT(no)
+])
+])
+
+# 2.6.18
+
+# LC_NR_PAGECACHE
+# 2.6.18 don't export nr_pagecahe
+AC_DEFUN([LC_NR_PAGECACHE],
+[AC_MSG_CHECKING([kernel export nr_pagecache])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/pagemap.h>
+],[
+ return atomic_read(&nr_pagecache);
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_NR_PAGECACHE, 1,
+ [is kernel export nr_pagecache])
+],[
+ AC_MSG_RESULT(no)
+])
+])
+
+#
+# LC_STATFS_DENTRY_PARAM
+# starting from 2.6.18 linux kernel uses dentry instead of super_block
+# for the first parameter of the super_operations->statfs() callback.
+#
+#
+AC_DEFUN([LC_STATFS_DENTRY_PARAM],
+[AC_MSG_CHECKING([if super_ops.statfs() first parameter is dentry])
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+],[
+ ((struct super_operations *)0)->statfs((struct dentry *)0, (struct kstatfs*)0);
+],[
+ AC_DEFINE(HAVE_STATFS_DENTRY_PARAM, 1,
+ [super_ops.statfs() first parameter is dentry])
+ AC_MSG_RESULT([yes])
+],[
+ AC_MSG_RESULT([no])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+])
+
+#
+# LC_VFS_KERN_MOUNT
+# starting from 2.6.18 kernel don't export do_kern_mount
+# and want to use vfs_kern_mount instead.
+#
+AC_DEFUN([LC_VFS_KERN_MOUNT],
+[AC_MSG_CHECKING([vfs_kern_mount exist in kernel])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/mount.h>
+],[
+ vfs_kern_mount(NULL, 0, NULL, NULL);
+],[
+ AC_DEFINE(HAVE_VFS_KERN_MOUNT, 1,
+ [vfs_kern_mount exist in kernel])
+ AC_MSG_RESULT([yes])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+#
+# LC_INVALIDATEPAGE_RETURN_INT
+# 2.6.17 changes return type for invalidatepage to 'void' from 'int'
+#
+AC_DEFUN([LC_INVALIDATEPAGE_RETURN_INT],
+[AC_MSG_CHECKING([invalidatepage has return int])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/buffer_head.h>
+],[
+ int rc = block_invalidatepage(NULL, 0);
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_INVALIDATEPAGE_RETURN_INT, 1,
+ [Define if return type of invalidatepage should be int])
+],[
+ AC_MSG_RESULT(no)
+])
+])
+
+# LC_UMOUNTBEGIN_HAS_VFSMOUNT
+# after 2.6.18 umount_begin has different parameters
+AC_DEFUN([LC_UMOUNTBEGIN_HAS_VFSMOUNT],
+[AC_MSG_CHECKING([if umount_begin needs vfsmount parameter instead of super_block])
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+
+ struct vfsmount;
+ static void cfg_umount_begin (struct vfsmount *v, int flags)
+ {
+ ;
+ }
+
+ static struct super_operations cfg_super_operations = {
+ .umount_begin = cfg_umount_begin,
+ };
+],[
+ cfg_super_operations.umount_begin(NULL,0);
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_UMOUNTBEGIN_VFSMOUNT, 1,
+ [Define umount_begin need second argument])
+],[
+ AC_MSG_RESULT(no)
+])
+EXTRA_KCFLAGS="$tmp_flags"
+])
+
+# LC_SEQ_LOCK
+# after 2.6.18 seq_file has lock intead of sem
+AC_DEFUN([LC_SEQ_LOCK],
+[AC_MSG_CHECKING([if struct seq_file has lock field])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/seq_file.h>
+],[
+ struct seq_file seq;
+
+ mutex_unlock(&seq.lock);
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_SEQ_LOCK, 1,
+ [after 2.6.18 seq_file has lock intead of sem])
+],[
+ AC_MSG_RESULT(NO)
+])
+])
+
+#
+# LC_EXPORT_FILEMAP_FDATAWRITE_RANGE
+#
+# No standard kernels export this
+#
+AC_DEFUN([LC_EXPORT_FILEMAP_FDATAWRITE_RANGE],
+[LB_CHECK_SYMBOL_EXPORT([filemap_fdatawrite_range],
+[mm/filemap.c],[
+AC_DEFINE(HAVE_FILEMAP_FDATAWRITE_RANGE, 1,
+ [filemap_fdatawrite_range is exported by the kernel])
+],[
+])
+])
+
+# LC_FLUSH_OWNER_ID
+# starting from 2.6.18 the file_operations .flush
+# method has a new "fl_owner_t id" parameter
+#
+AC_DEFUN([LC_FLUSH_OWNER_ID],
+[AC_MSG_CHECKING([if file_operations .flush has an fl_owner_t id])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+],[
+ struct file_operations *fops = NULL;
+ fl_owner_t id;
+ int i;
+
+ i = fops->flush(NULL, id);
+],[
+ AC_DEFINE(HAVE_FLUSH_OWNER_ID, 1,
+ [file_operations .flush method has an fl_owner_t id])
+ AC_MSG_RESULT([yes])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+#
+# LC_EXPORT_INVALIDATE_MAPPING_PAGES
+#
+# SLES9, RHEL4, RHEL5, vanilla 2.6.24 export invalidate_mapping_pages() but
+# SLES10 2.6.16 does not, for some reason. For filter cache invalidation.
+#
+AC_DEFUN([LC_EXPORT_INVALIDATE_MAPPING_PAGES],
+ [LB_CHECK_SYMBOL_EXPORT([invalidate_mapping_pages], [mm/truncate.c], [
+ AC_DEFINE(HAVE_INVALIDATE_MAPPING_PAGES, 1,
+ [exported invalidate_mapping_pages])],
+ [LB_CHECK_SYMBOL_EXPORT([invalidate_inode_pages], [mm/truncate.c], [
+ AC_DEFINE(HAVE_INVALIDATE_INODE_PAGES, 1,
+ [exported invalidate_inode_pages])], [
+ AC_MSG_ERROR([no way to invalidate pages])
+ ])
+ ],[])
+])
+
+#2.6.18 + RHEL5 (fc6)
+
+# RHEL5 in FS-cache patch rename PG_checked flag into PG_fs_misc
+AC_DEFUN([LC_PG_FS_MISC],
+[AC_MSG_CHECKING([kernel has PG_fs_misc])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/mm.h>
+ #include <linux/page-flags.h>
+],[
+ #ifndef PG_fs_misc
+ #error PG_fs_misc not defined in kernel
+ #endif
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_PG_FS_MISC, 1,
+ [is kernel have PG_fs_misc])
+],[
+ AC_MSG_RESULT(no)
+])
+])
+
+# RHEL5 PageChecked and SetPageChecked defined
+AC_DEFUN([LC_PAGE_CHECKED],
+[AC_MSG_CHECKING([kernel has PageChecked and SetPageChecked])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/mm.h>
+#ifdef HAVE_LINUX_MMTYPES_H
+ #include <linux/mm_types.h>
+#endif
+ #include <linux/page-flags.h>
+],[
+ struct page *p = NULL;
+
+ /* before 2.6.26 this define*/
+ #ifndef PageChecked
+ /* 2.6.26 use function instead of define for it */
+ SetPageChecked(p);
+ PageChecked(p);
+ #endif
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_PAGE_CHECKED, 1,
+ [does kernel have PageChecked and SetPageChecked])
+],[
+ AC_MSG_RESULT(no)
+])
+])
+
+#
+# LC_LINUX_FIEMAP_H
+#
+# If we have fiemap.h
+# after 2.6.27 use fiemap.h in include/linux
+#
+AC_DEFUN([LC_LINUX_FIEMAP_H],
+[LB_CHECK_FILE([$LINUX/include/linux/fiemap.h],[
+ AC_MSG_CHECKING([if fiemap.h can be compiled])
+ LB_LINUX_TRY_COMPILE([
+ #include <linux/types.h>
+ #include <linux/fiemap.h>
+ ],[],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_LINUX_FIEMAP_H, 1, [Kernel has fiemap.h])
+ ],[
+ AC_MSG_RESULT([no])
+ ])
+],
+[])
+])
+
+# 2.6.19
+
+# 2.6.19 API changes
+# inode don't have i_blksize field
+AC_DEFUN([LC_INODE_BLKSIZE],
+[AC_MSG_CHECKING([inode has i_blksize field])
+LB_LINUX_TRY_COMPILE([
+#include <linux/fs.h>
+],[
+ struct inode i;
+ i.i_blksize = 0;
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_INODE_BLKSIZE, 1,
+ [struct inode has i_blksize field])
+],[
+ AC_MSG_RESULT(no)
+])
+])
+
+# LC_FILE_WRITEV
+# 2.6.19 replaced writev with aio_write
+AC_DEFUN([LC_FILE_WRITEV],
+[AC_MSG_CHECKING([writev in fops])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+],[
+ struct file_operations *fops = NULL;
+ fops->writev = NULL;
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_FILE_WRITEV, 1,
+ [use fops->writev])
+],[
+ AC_MSG_RESULT(no)
+])
+])
+
+# LC_FILE_READV
+# 2.6.19 replaced readv with aio_read
+AC_DEFUN([LC_FILE_READV],
+[AC_MSG_CHECKING([readv in fops])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+],[
+ struct file_operations *fops = NULL;
+ fops->readv = NULL;
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_FILE_READV, 1,
+ [use fops->readv])
+],[
+ AC_MSG_RESULT(no)
+])
+])
+
+# 2.6.20
+
+# LC_CANCEL_DIRTY_PAGE
+# 2.6.20 introduced cancel_dirty_page instead of clear_page_dirty.
+AC_DEFUN([LC_CANCEL_DIRTY_PAGE],
+ [AC_MSG_CHECKING([kernel has cancel_dirty_page])
+ # the implementation of cancel_dirty_page in OFED 1.4.1's SLES10 SP2
+ # backport is broken, so ignore it
+ if test -f $OFED_BACKPORT_PATH/linux/mm.h &&
+ test "$(sed -ne '/^static inline void cancel_dirty_page(struct page \*page, unsigned int account_size)$/,/^}$/p' $OFED_BACKPORT_PATH/linux/mm.h | md5sum)" = "c518cb32d6394760c5bca14cb7538d3e -"; then
+ AC_MSG_RESULT(no)
+ else
+ LB_LINUX_TRY_COMPILE([
+ #include <linux/mm.h>
+ #include <linux/page-flags.h>
+],[
+ cancel_dirty_page(NULL, 0);
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_CANCEL_DIRTY_PAGE, 1,
+ [kernel has cancel_dirty_page instead of clear_page_dirty])
+],[
+ AC_MSG_RESULT(no)
+])
+ fi
+])
+
+# raid5-zerocopy patch
+
+#
+# LC_PAGE_CONSTANT
+#
+# In order to support raid5 zerocopy patch, we have to patch the kernel to make
+# it support constant page, which means the page won't be modified during the
+# IO.
+#
+AC_DEFUN([LC_PAGE_CONSTANT],
+[AC_MSG_CHECKING([if kernel have PageConstant defined])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/mm.h>
+ #include <linux/page-flags.h>
+],[
+ #ifndef PG_constant
+ #error "Have no raid5 zcopy patch"
+ #endif
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_PAGE_CONSTANT, 1, [kernel have PageConstant supported])
+],[
+ AC_MSG_RESULT(no);
+])
+])
+
+# 2.6.22
+
+# 2.6.22 lost second parameter for invalidate_bdev
+AC_DEFUN([LC_INVALIDATE_BDEV_2ARG],
+[AC_MSG_CHECKING([if invalidate_bdev has second argument])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/buffer_head.h>
+],[
+ invalidate_bdev(NULL,0);
+],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_INVALIDATE_BDEV_2ARG, 1,
+ [invalidate_bdev has second argument])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+#
+# check for crypto API
+#
+AC_DEFUN([LC_ASYNC_BLOCK_CIPHER],
+[AC_MSG_CHECKING([if kernel has block cipher support])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/err.h>
+ #include <linux/crypto.h>
+],[
+ struct crypto_blkcipher *tfm;
+ tfm = crypto_alloc_blkcipher("aes", 0, sizeof(tfm) );
+],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_ASYNC_BLOCK_CIPHER, 1, [kernel has block cipher support])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+#
+# check for struct hash_desc
+#
+AC_DEFUN([LC_STRUCT_HASH_DESC],
+[AC_MSG_CHECKING([if kernel has struct hash_desc])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/err.h>
+ #include <linux/crypto.h>
+],[
+ struct hash_desc foo;
+],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_STRUCT_HASH_DESC, 1, [kernel has struct hash_desc])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+#
+# check for struct blkcipher_desc
+#
+AC_DEFUN([LC_STRUCT_BLKCIPHER_DESC],
+[AC_MSG_CHECKING([if kernel has struct blkcipher_desc])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/err.h>
+ #include <linux/crypto.h>
+],[
+ struct blkcipher_desc foo;
+],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_STRUCT_BLKCIPHER_DESC, 1, [kernel has struct blkcipher_desc])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+#
+# 2.6.19 check for FS_RENAME_DOES_D_MOVE flag
+#
+AC_DEFUN([LC_FS_RENAME_DOES_D_MOVE],
+[AC_MSG_CHECKING([if kernel has FS_RENAME_DOES_D_MOVE flag])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+],[
+ int v = FS_RENAME_DOES_D_MOVE;
+],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_FS_RENAME_DOES_D_MOVE, 1, [kernel has FS_RENAME_DOES_D_MOVE flag])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.23
+
+# 2.6.23 have return type 'void' for unregister_blkdev
+AC_DEFUN([LC_UNREGISTER_BLKDEV_RETURN_INT],
+[AC_MSG_CHECKING([if unregister_blkdev return int])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+],[
+ int i = unregister_blkdev(0,NULL);
+],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_UNREGISTER_BLKDEV_RETURN_INT, 1,
+ [unregister_blkdev return int])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.23 change .sendfile to .splice_read
+AC_DEFUN([LC_KERNEL_SPLICE_READ],
+[AC_MSG_CHECKING([if kernel has .splice_read])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+],[
+ struct file_operations file;
+
+ file.splice_read = NULL;
+], [
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_KERNEL_SPLICE_READ, 1,
+ [kernel has .slice_read])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.23 change .sendfile to .splice_read
+# RHEL4 (-92 kernel) have both sendfile and .splice_read API
+AC_DEFUN([LC_KERNEL_SENDFILE],
+[AC_MSG_CHECKING([if kernel has .sendfile])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+],[
+ struct file_operations file;
+
+ file.sendfile = NULL;
+], [
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_KERNEL_SENDFILE, 1,
+ [kernel has .sendfile])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.23 extract nfs export related data into exportfs.h
+AC_DEFUN([LC_HAVE_EXPORTFS_H],
+[LB_CHECK_FILE([$LINUX/include/linux/exportfs.h], [
+ AC_DEFINE(HAVE_LINUX_EXPORTFS_H, 1,
+ [kernel has include/exportfs.h])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.23 has new page fault handling API
+AC_DEFUN([LC_VM_OP_FAULT],
+[AC_MSG_CHECKING([kernel has .fault in vm_operation_struct])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/mm.h>
+],[
+ struct vm_operations_struct op;
+
+ op.fault = NULL;
+], [
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_VM_OP_FAULT, 1,
+ [kernel has .fault in vm_operation_struct])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.23 add code to wait other users to complete before removing procfs entry
+AC_DEFUN([LC_PROCFS_USERS],
+[AC_MSG_CHECKING([if kernel has pde_users member in procfs entry struct])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/proc_fs.h>
+],[
+ struct proc_dir_entry pde;
+
+ pde.pde_users = 0;
+],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_PROCFS_USERS, 1,
+ [kernel has pde_users member in procfs entry struct])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.23 exports exportfs_decode_fh
+AC_DEFUN([LC_EXPORTFS_DECODE_FH],
+[LB_CHECK_SYMBOL_EXPORT([exportfs_decode_fh],
+[fs/exportfs/expfs.c],[
+ AC_DEFINE(HAVE_EXPORTFS_DECODE_FH, 1,
+ [exportfs_decode_fh has been export])
+],[
+])
+])
+
+# 2.6.24
+
+# 2.6.24 need linux/mm_types.h included
+AC_DEFUN([LC_HAVE_MMTYPES_H],
+[LB_CHECK_FILE([$LINUX/include/linux/mm_types.h], [
+ AC_DEFINE(HAVE_LINUX_MMTYPES_H, 1,
+ [kernel has include/mm_types.h])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.24 has bio_endio with 2 args
+AC_DEFUN([LC_BIO_ENDIO_2ARG],
+[AC_MSG_CHECKING([if kernel has bio_endio with 2 args])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/bio.h>
+],[
+ bio_endio(NULL, 0);
+], [
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_BIO_ENDIO_2ARG, 1,
+ [kernel has bio_endio with 2 args])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.24 has new members in exports struct.
+AC_DEFUN([LC_FH_TO_DENTRY],
+[AC_MSG_CHECKING([if kernel has .fh_to_dentry member in export_operations struct])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+#ifdef HAVE_LINUX_EXPORTFS_H
+ #include <linux/exportfs.h>
+#endif
+],[
+ struct export_operations exp;
+ memset(exp.fh_to_dentry, 0, sizeof(exp.fh_to_dentry));
+], [
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_FH_TO_DENTRY, 1,
+ [kernel has .fh_to_dentry member in export_operations struct])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.24 removes long aged procfs entry -> deleted member
+AC_DEFUN([LC_PROCFS_DELETED],
+[AC_MSG_CHECKING([if kernel has deleted member in procfs entry struct])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/proc_fs.h>
+],[
+ struct proc_dir_entry pde;
+
+ pde.deleted = sizeof(pde);
+], [
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_PROCFS_DELETED, 1,
+ [kernel has deleted member in procfs entry struct])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.24 has bdi_init()/bdi_destroy() functions.
+AC_DEFUN([LC_EXPORT_BDI_INIT],
+[LB_CHECK_SYMBOL_EXPORT([bdi_init],
+[mm/backing-dev.c],[
+ AC_DEFINE(HAVE_BDI_INIT, 1,
+ [bdi_init/bdi_destroy functions are present])
+],[
+])
+])
+
+# 2.6.25
+
+# 2.6.25 change define to inline
+AC_DEFUN([LC_MAPPING_CAP_WRITEBACK_DIRTY],
+[AC_MSG_CHECKING([if kernel have mapping_cap_writeback_dirty])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/backing-dev.h>
+],[
+ #ifndef mapping_cap_writeback_dirty
+ mapping_cap_writeback_dirty(NULL);
+ #endif
+],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_MAPPING_CAP_WRITEBACK_DIRTY, 1,
+ [kernel have mapping_cap_writeback_dirty])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.26
+
+# 2.6.26 isn't export set_fs_pwd and change paramter in fs struct
+AC_DEFUN([LC_FS_STRUCT_USE_PATH],
+[AC_MSG_CHECKING([fs_struct use path structure])
+LB_LINUX_TRY_COMPILE([
+ #include <asm/atomic.h>
+ #include <linux/spinlock.h>
+ #include <linux/fs_struct.h>
+],[
+ struct path path;
+ struct fs_struct fs;
+
+ fs.pwd = path;
+ memset(&fs, 0, sizeof(fs));
+], [
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_FS_STRUCT_USE_PATH, 1,
+ [fs_struct use path structure])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+
+#
+# 2.6.27
+#
+AC_DEFUN([LC_INODE_PERMISION_2ARGS],
+[AC_MSG_CHECKING([inode_operations->permission has two args])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+],[
+ struct inode *inode;
+ inode->i_op->permission(NULL, 0);
+],[
+ AC_DEFINE(HAVE_INODE_PERMISION_2ARGS, 1,
+ [inode_operations->permission has two args])
+ AC_MSG_RESULT([yes])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.27 has file_remove_suid instead of remove_suid
+AC_DEFUN([LC_FILE_REMOVE_SUID],
+[AC_MSG_CHECKING([kernel has file_remove_suid])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+],[
+ file_remove_suid(NULL);
+],[
+ AC_DEFINE(HAVE_FILE_REMOVE_SUID, 1,
+ [kernel have file_remove_suid])
+ AC_MSG_RESULT([yes])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.27 have new page locking API
+AC_DEFUN([LC_TRYLOCKPAGE],
+[AC_MSG_CHECKING([kernel uses trylock_page for page lock])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/pagemap.h>
+],[
+ trylock_page(NULL);
+],[
+ AC_DEFINE(HAVE_TRYLOCK_PAGE, 1,
+ [kernel uses trylock_page for page lock])
+ AC_MSG_RESULT([yes])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.27 removed the read_inode from super_operations.
+AC_DEFUN([LC_READ_INODE_IN_SBOPS],
+[AC_MSG_CHECKING([super_operations has a read_inode field])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+],[
+ struct super_operations *sop;
+ sop->read_inode(NULL);
+],[
+ AC_DEFINE(HAVE_READ_INODE_IN_SBOPS, 1,
+ [super_operations has a read_inode])
+ AC_MSG_RESULT([yes])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.27 has inode_permission instead of permisson
+AC_DEFUN([LC_EXPORT_INODE_PERMISSION],
+[LB_CHECK_SYMBOL_EXPORT([inode_permission],
+[fs/namei.c],[
+AC_DEFINE(HAVE_EXPORT_INODE_PERMISSION, 1,
+ [inode_permission is exported by the kernel])
+],[
+])
+])
+
+# 2.6.27 use 5th parameter in quota_on for remount.
+AC_DEFUN([LC_QUOTA_ON_5ARGS],
+[AC_MSG_CHECKING([quota_on needs 5 parameters])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/quota.h>
+],[
+ struct quotactl_ops *qop;
+ qop->quota_on(NULL, 0, 0, NULL, 0);
+],[
+ AC_DEFINE(HAVE_QUOTA_ON_5ARGS, 1,
+ [quota_on needs 5 paramters])
+ AC_MSG_RESULT([yes])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.27 use 3th parameter in quota_off for remount.
+AC_DEFUN([LC_QUOTA_OFF_3ARGS],
+[AC_MSG_CHECKING([quota_off needs 3 parameters])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/quota.h>
+],[
+ struct quotactl_ops *qop;
+ qop->quota_off(NULL, 0, 0);
+],[
+ AC_DEFINE(HAVE_QUOTA_OFF_3ARGS, 1,
+ [quota_off needs 3 paramters])
+ AC_MSG_RESULT([yes])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.27 has vfs_dq_off inline function.
+AC_DEFUN([LC_VFS_DQ_OFF],
+[AC_MSG_CHECKING([vfs_dq_off is defined])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/quotaops.h>
+],[
+ vfs_dq_off(NULL, 0);
+],[
+ AC_DEFINE(HAVE_VFS_DQ_OFF, 1, [vfs_dq_off is defined])
+ AC_MSG_RESULT([yes])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# LC_LOCK_MAP_ACQUIRE
+# after 2.6.27 lock_map_acquire replaces lock_acquire
+AC_DEFUN([LC_LOCK_MAP_ACQUIRE],
+[AC_MSG_CHECKING([if lock_map_acquire is defined])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/lockdep.h>
+],[
+ lock_map_acquire(NULL);
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_LOCK_MAP_ACQUIRE, 1,
+ [lock_map_acquire is defined])
+],[
+ AC_MSG_RESULT(no)
+])
+])
+
+# 2.6.27.15-2 sles11
+
+# 2.6.27 sles11 remove the bi_hw_segments
+AC_DEFUN([LC_BI_HW_SEGMENTS],
+[AC_MSG_CHECKING([struct bio has a bi_hw_segments field])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/bio.h>
+],[
+ struct bio io;
+ io.bi_hw_segments = sizeof(io);
+],[
+ AC_DEFINE(HAVE_BI_HW_SEGMENTS, 1,
+ [struct bio has a bi_hw_segments field])
+ AC_MSG_RESULT([yes])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+#
+# 2.6.27 sles11 move the quotaio_v1{2}.h from include/linux to fs
+# 2.6.32 move the quotaio_v1{2}.h from fs to fs/quota
+AC_DEFUN([LC_HAVE_QUOTAIO_H],
+[LB_CHECK_FILE([$LINUX/include/linux/quotaio_v2.h],[
+ AC_DEFINE(HAVE_QUOTAIO_H, 1,
+ [kernel has include/linux/quotaio_v2.h])
+],[LB_CHECK_FILE([$LINUX/fs/quotaio_v2.h],[
+ AC_DEFINE(HAVE_FS_QUOTAIO_H, 1,
+ [kernel has fs/quotaio_v1.h])
+],[LB_CHECK_FILE([$LINUX/fs/quota/quotaio_v2.h],[
+ AC_DEFINE(HAVE_FS_QUOTA_QUOTAIO_H, 1,
+ [kernel has fs/quota/quotaio_v2.h])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+])
+])
+
+# sles10 sp2 need 5 parameter for vfs_symlink
+AC_DEFUN([LC_VFS_SYMLINK_5ARGS],
+[AC_MSG_CHECKING([vfs_symlink need 5 parameter])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+],[
+ struct inode *dir = NULL;
+ struct dentry *dentry = NULL;
+ struct vfsmount *mnt = NULL;
+ const char * path = NULL;
+ vfs_symlink(dir, dentry, mnt, path, 0);
+],[
+ AC_DEFINE(HAVE_VFS_SYMLINK_5ARGS, 1,
+ [vfs_symlink need 5 parameteres])
+ AC_MSG_RESULT([yes])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.27 sles11 has sb_any_quota_active
+AC_DEFUN([LC_SB_ANY_QUOTA_ACTIVE],
+[AC_MSG_CHECKING([Kernel has sb_any_quota_active])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/quotaops.h>
+],[
+ sb_any_quota_active(NULL);
+],[
+ AC_DEFINE(HAVE_SB_ANY_QUOTA_ACTIVE, 1,
+ [Kernel has a sb_any_quota_active])
+ AC_MSG_RESULT([yes])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.27 sles11 has sb_has_quota_active
+AC_DEFUN([LC_SB_HAS_QUOTA_ACTIVE],
+[AC_MSG_CHECKING([Kernel has sb_has_quota_active])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/quotaops.h>
+],[
+ sb_has_quota_active(NULL, 0);
+],[
+ AC_DEFINE(HAVE_SB_HAS_QUOTA_ACTIVE, 1,
+ [Kernel has a sb_has_quota_active])
+ AC_MSG_RESULT([yes])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.27 exported add_to_page_cache_lru.
+AC_DEFUN([LC_EXPORT_ADD_TO_PAGE_CACHE_LRU],
+[LB_CHECK_SYMBOL_EXPORT([add_to_page_cache_lru],
+[mm/filemap.c],[
+ AC_DEFINE(HAVE_ADD_TO_PAGE_CACHE_LRU, 1,
+ [add_to_page_cache_lru functions are present])
+],[
+])
+])
+
+#
+# 2.6.29 introduce sb_any_quota_loaded.
+#
+AC_DEFUN([LC_SB_ANY_QUOTA_LOADED],
+[AC_MSG_CHECKING([Kernel has sb_any_quota_loaded])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/quotaops.h>
+],[
+ sb_any_quota_loaded(NULL);
+],[
+ AC_DEFINE(HAVE_SB_ANY_QUOTA_LOADED, 1,
+ [Kernel has a sb_any_quota_loaded])
+ AC_MSG_RESULT([yes])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.30 x86 node_to_cpumask has been removed. must use cpumask_of_node
+AC_DEFUN([LC_EXPORT_CPUMASK_OF_NODE],
+ [LB_CHECK_SYMBOL_EXPORT([node_to_cpumask_map],
+ [arch/$LINUX_ARCH/mm/numa.c],
+ [AC_DEFINE(HAVE_CPUMASK_OF_NODE, 1,
+ [node_to_cpumask_map is exported by
+ the kernel])]) # x86_64
+ ])
+
+# 2.6.31 replaces blk_queue_hardsect_size by blk_queue_logical_block_size function
+AC_DEFUN([LC_BLK_QUEUE_LOG_BLK_SIZE],
+[AC_MSG_CHECKING([if blk_queue_logical_block_size is defined])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/blkdev.h>
+],[
+ blk_queue_logical_block_size(NULL, 0);
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_BLK_QUEUE_LOG_BLK_SIZE, 1,
+ [blk_queue_logical_block_size is defined])
+],[
+ AC_MSG_RESULT(no)
+])
+])
+
+# 2.6.32
+
+# 2.6.32 add a limits member in struct request_queue.
+AC_DEFUN([LC_REQUEST_QUEUE_LIMITS],
+[AC_MSG_CHECKING([if request_queue has a limits field])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/blkdev.h>
+],[
+ struct request_queue rq;
+ rq.limits.io_min = 0;
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_REQUEST_QUEUE_LIMITS, 1,
+ [request_queue has a limits field])
+],[
+ AC_MSG_RESULT(no)
+])
+])
+
+# 2.6.32 has bdi_register() functions.
+AC_DEFUN([LC_EXPORT_BDI_REGISTER],
+[LB_CHECK_SYMBOL_EXPORT([bdi_register],
+[mm/backing-dev.c],[
+ AC_DEFINE(HAVE_BDI_REGISTER, 1,
+ [bdi_register function is present])
+],[
+])
+])
+
+# 2.6.32 add s_bdi for super block
+AC_DEFUN([LC_SB_BDI],
+[AC_MSG_CHECKING([if super_block has s_bdi field])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+],[
+ struct super_block sb;
+ sb.s_bdi = NULL;
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_SB_BDI, 1,
+ [super_block has s_bdi field])
+],[
+ AC_MSG_RESULT(no)
+])
+])
+
+# 2.6.27.15-2 SuSE 11 sp0 kernels lack the name field for BDI
+AC_DEFUN([LC_BDI_NAME],
+[AC_MSG_CHECKING([if backing_device_info has name field])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/blkkdev.h>
+],[
+ struct backing_dev_info bdi;
+ bdi.name = NULL;
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_BDI_NAME, 1,
+ [backing_device_info has name field])
+],[
+ AC_MSG_RESULT(no)
+])
+])