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mirror_zfs/config/kernel-evict-inode.m4

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Linux 2.6.36 compat, sops->evict_inode() The new prefered inteface for evicting an inode from the inode cache is the ->evict_inode() callback. It replaces both the ->delete_inode() and ->clear_inode() callbacks which were previously used for this.
2011-02-12 00:46:10 +03:00
dnl #
dnl # 2.6.36 API change
dnl # The sops->delete_inode() and sops->clear_inode() callbacks have
dnl # replaced by a single sops->evict_inode() callback.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_EVICT_INODE], [
AC_MSG_CHECKING([whether sops->evict_inode() exists])
ZFS_LINUX_TRY_COMPILE([
#include <linux/fs.h>
Fix build failures on PaX/GRSecurity patched kernels Gentoo Hardened kernels include the PaX/GRSecurity patches. They use a dialect of C that relies on a GCC plugin. In particular, struct file_operations has been marked do_const in the PaX/GRSecurity dialect, which causes GCC to consider all instances of it as const. This caused failures in the autotools checks and the ZFS source code. To address this, we modify the autotools checks to take into account differences between the PaX C dialect and the regular C dialect. We also modify struct zfs_acl's z_ops member to be a pointer to a function pointer table. Lastly, we modify zpl_put_link() to address a PaX change to the function prototype of nd_get_link(). This avoids compiler errors in the PaX/GRSecurity dialect. Note that the change in zpl_put_link() causes a warning that becomes a build failure when debugging is enabled. Fixing that warning requires ryao/spl@5ca50ef459c59bc74b7a7cd3af7311da2b1cd2c3. Signed-off-by: Richard Yao <ryao@cs.stonybrook.edu> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #484
2012-05-31 07:25:31 +04:00
void evict_inode (struct inode * t) { return; }
static struct super_operations sops __attribute__ ((unused)) = {
Improve HAVE_EVICT_INODE check The hardened gentoo kernel defines all of the super block operation callbacks as const. This prevents the autoconf test from assigning the callback and results in a false negative. By moving the assignment in to the declaration we can avoid this issue and get a correct result for this patched kernel. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #296
2011-08-06 03:55:04 +04:00
.evict_inode = evict_inode,
};
Fix build failures on PaX/GRSecurity patched kernels Gentoo Hardened kernels include the PaX/GRSecurity patches. They use a dialect of C that relies on a GCC plugin. In particular, struct file_operations has been marked do_const in the PaX/GRSecurity dialect, which causes GCC to consider all instances of it as const. This caused failures in the autotools checks and the ZFS source code. To address this, we modify the autotools checks to take into account differences between the PaX C dialect and the regular C dialect. We also modify struct zfs_acl's z_ops member to be a pointer to a function pointer table. Lastly, we modify zpl_put_link() to address a PaX change to the function prototype of nd_get_link(). This avoids compiler errors in the PaX/GRSecurity dialect. Note that the change in zpl_put_link() causes a warning that becomes a build failure when debugging is enabled. Fixing that warning requires ryao/spl@5ca50ef459c59bc74b7a7cd3af7311da2b1cd2c3. Signed-off-by: Richard Yao <ryao@cs.stonybrook.edu> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #484
2012-05-31 07:25:31 +04:00
],[
Linux 2.6.36 compat, sops->evict_inode() The new prefered inteface for evicting an inode from the inode cache is the ->evict_inode() callback. It replaces both the ->delete_inode() and ->clear_inode() callbacks which were previously used for this.
2011-02-12 00:46:10 +03:00
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_EVICT_INODE, 1, [sops->evict_inode() exists])
],[
AC_MSG_RESULT(no)
])
])
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