The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/config/kernel-fsync.m4

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    1 dnl #
    2 dnl # Check file_operations->fsync interface.
    3 dnl #
    4 AC_DEFUN([ZFS_AC_KERNEL_SRC_FSYNC], [
    5         ZFS_LINUX_TEST_SRC([fsync_without_dentry], [
    6                 #include <linux/fs.h>
    7 
    8                 int test_fsync(struct file *f, int x) { return 0; }
    9 
   10                 static const struct file_operations
   11                     fops __attribute__ ((unused)) = {
   12                         .fsync = test_fsync,
   13                 };
   14         ],[])
   15 
   16         ZFS_LINUX_TEST_SRC([fsync_range], [
   17                 #include <linux/fs.h>
   18 
   19                 int test_fsync(struct file *f, loff_t a, loff_t b, int c)
   20                     { return 0; }
   21 
   22                 static const struct file_operations
   23                     fops __attribute__ ((unused)) = {
   24                         .fsync = test_fsync,
   25                 };
   26         ],[])
   27 ])
   28 
   29 AC_DEFUN([ZFS_AC_KERNEL_FSYNC], [
   30         dnl #
   31         dnl # Linux 2.6.35 - Linux 3.0 API
   32         dnl #
   33         AC_MSG_CHECKING([whether fops->fsync() wants no dentry])
   34         ZFS_LINUX_TEST_RESULT([fsync_without_dentry], [
   35                 AC_MSG_RESULT([yes])
   36                 AC_DEFINE(HAVE_FSYNC_WITHOUT_DENTRY, 1,
   37                     [fops->fsync() without dentry])
   38         ],[
   39                 AC_MSG_RESULT([no])
   40 
   41                 dnl #
   42                 dnl # Linux 3.1 - 3.x API
   43                 dnl #
   44                 AC_MSG_CHECKING([whether fops->fsync() wants range])
   45                 ZFS_LINUX_TEST_RESULT([fsync_range], [
   46                         AC_MSG_RESULT([range])
   47                         AC_DEFINE(HAVE_FSYNC_RANGE, 1,
   48                             [fops->fsync() with range])
   49                 ],[
   50                         ZFS_LINUX_TEST_ERROR([fops->fsync])
   51                 ])
   52         ])
   53 ])

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