76 lines
1.9 KiB
Text
76 lines
1.9 KiB
Text
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AC_DEFUN([ZFS_AC_KERNEL_VFS_ITERATE], [
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dnl #
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dnl # 4.7 API change
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dnl #
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AC_MSG_CHECKING([whether fops->iterate_shared() is available])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/fs.h>
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int iterate(struct file *filp, struct dir_context * context)
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{ return 0; }
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static const struct file_operations fops
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__attribute__ ((unused)) = {
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.iterate_shared = iterate,
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};
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],[
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_VFS_ITERATE_SHARED, 1,
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[fops->iterate_shared() is available])
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],[
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AC_MSG_RESULT(no)
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dnl #
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dnl # 3.11 API change
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dnl #
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dnl # RHEL 7.5 compatibility; the fops.iterate() method was
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dnl # added to the file_operations structure but in order to
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dnl # maintain KABI compatibility all callers must set
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dnl # FMODE_KABI_ITERATE which is checked in iterate_dir().
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dnl # When detected ignore this interface and fallback to
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dnl # to using fops.readdir() to retain KABI compatibility.
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dnl #
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AC_MSG_CHECKING([whether fops->iterate() is available])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/fs.h>
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int iterate(struct file *filp,
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struct dir_context *context) { return 0; }
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static const struct file_operations fops
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__attribute__ ((unused)) = {
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.iterate = iterate,
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};
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#if defined(FMODE_KABI_ITERATE)
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#error "RHEL 7.5, FMODE_KABI_ITERATE interface"
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#endif
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],[
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_VFS_ITERATE, 1,
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[fops->iterate() is available])
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],[
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AC_MSG_RESULT(no)
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AC_MSG_CHECKING([whether fops->readdir() is available])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/fs.h>
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int readdir(struct file *filp, void *entry,
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filldir_t func) { return 0; }
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static const struct file_operations fops
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__attribute__ ((unused)) = {
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.readdir = readdir,
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};
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],[
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_VFS_READDIR, 1,
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[fops->readdir() is available])
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],[
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AC_MSG_ERROR(no; file a bug report with ZoL)
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])
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])
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])
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])
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