105 lines
2.9 KiB
Text
105 lines
2.9 KiB
Text
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dnl #
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dnl # Supported get_link() interfaces checked newest to oldest.
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dnl # Note this interface used to be named follow_link.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_GET_LINK], [
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ZFS_LINUX_TEST_SRC([inode_operations_get_link], [
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#include <linux/fs.h>
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const char *get_link(struct dentry *de, struct inode *ip,
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struct delayed_call *done) { return "symlink"; }
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static struct inode_operations
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iops __attribute__ ((unused)) = {
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.get_link = get_link,
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};
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],[])
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ZFS_LINUX_TEST_SRC([inode_operations_get_link_cookie], [
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#include <linux/fs.h>
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const char *get_link(struct dentry *de, struct
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inode *ip, void **cookie) { return "symlink"; }
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static struct inode_operations
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iops __attribute__ ((unused)) = {
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.get_link = get_link,
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};
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],[])
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ZFS_LINUX_TEST_SRC([inode_operations_follow_link], [
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#include <linux/fs.h>
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const char *follow_link(struct dentry *de,
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void **cookie) { return "symlink"; }
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static struct inode_operations
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iops __attribute__ ((unused)) = {
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.follow_link = follow_link,
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};
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],[])
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ZFS_LINUX_TEST_SRC([inode_operations_follow_link_nameidata], [
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#include <linux/fs.h>
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void *follow_link(struct dentry *de, struct
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nameidata *nd) { return (void *)NULL; }
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static struct inode_operations
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iops __attribute__ ((unused)) = {
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.follow_link = follow_link,
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};
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],[])
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])
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AC_DEFUN([ZFS_AC_KERNEL_GET_LINK], [
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dnl #
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dnl # 4.5 API change
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dnl # The get_link interface has added a delayed done call and
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dnl # used it to retire the put_link() interface.
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dnl #
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AC_MSG_CHECKING([whether iops->get_link() passes delayed])
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ZFS_LINUX_TEST_RESULT([inode_operations_get_link], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_GET_LINK_DELAYED, 1, [iops->get_link() delayed])
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],[
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AC_MSG_RESULT(no)
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dnl #
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dnl # 4.5 API change
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dnl # The follow_link() interface has been replaced by
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dnl # get_link() which behaves the same as before except:
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dnl # - An inode is passed as a separate argument
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dnl # - When called in RCU mode a NULL dentry is passed.
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dnl #
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AC_MSG_CHECKING([whether iops->get_link() passes cookie])
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ZFS_LINUX_TEST_RESULT([inode_operations_get_link_cookie], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_GET_LINK_COOKIE, 1,
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[iops->get_link() cookie])
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],[
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AC_MSG_RESULT(no)
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dnl #
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dnl # 4.2 API change
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dnl # This kernel retired the nameidata structure.
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dnl #
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AC_MSG_CHECKING(
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[whether iops->follow_link() passes cookie])
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ZFS_LINUX_TEST_RESULT([inode_operations_follow_link], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_FOLLOW_LINK_COOKIE, 1,
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[iops->follow_link() cookie])
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],[
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AC_MSG_RESULT(no)
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dnl #
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dnl # 2.6.32 API
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dnl #
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AC_MSG_CHECKING(
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[whether iops->follow_link() passes nameidata])
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ZFS_LINUX_TEST_RESULT(
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[inode_operations_follow_link_nameidata],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_FOLLOW_LINK_NAMEIDATA, 1,
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[iops->follow_link() nameidata])
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],[
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ZFS_LINUX_TEST_ERROR([get_link])
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])
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])
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])
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])
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])
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