dnl # 3.6 API change
dnl #
AC_DEFUN([ZFS_AC_KERNEL_CREATE_NAMEIDATA], [
- AC_MSG_CHECKING([whether iops->create() takes struct nameidata])
+ AC_MSG_CHECKING([whether iops->create() passes nameidata])
ZFS_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_CREATE_NAMEIDATA, 1,
- [iops->create() operation takes nameidata])
+ [iops->create() passes nameidata])
],[
AC_MSG_RESULT(no)
])
--- /dev/null
+dnl #
+dnl # 4.2 API change
+dnl # This kernel retired the nameidata structure which forced the
+dnl # restructuring of the follow_link() prototype and how it is called.
+dnl # We check for the new interface rather than detecting the old one.
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_FOLLOW_LINK], [
+ AC_MSG_CHECKING([whether iops->follow_link() passes nameidata])
+ ZFS_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+ const char *follow_link(struct dentry *de, void **cookie)
+ { return "symlink"; }
+ static struct inode_operations iops __attribute__ ((unused)) = {
+ .follow_link = follow_link,
+ };
+ ],[
+ ],[
+ AC_MSG_RESULT(no)
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_FOLLOW_LINK_NAMEIDATA, 1,
+ [iops->follow_link() nameidata])
+ ])
+])
dnl # 3.6 API change
dnl #
AC_DEFUN([ZFS_AC_KERNEL_LOOKUP_NAMEIDATA], [
- AC_MSG_CHECKING([whether iops->lookup() takes struct nameidata])
+ AC_MSG_CHECKING([whether iops->lookup() passes nameidata])
ZFS_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_LOOKUP_NAMEIDATA, 1,
- [iops->lookup() operation takes nameidata])
+ [iops->lookup() passes nameidata])
],[
AC_MSG_RESULT(no)
])
--- /dev/null
+dnl #
+dnl # 4.2 API change
+dnl # This kernel retired the nameidata structure which forced the
+dnl # restructuring of the put_link() prototype and how it is called.
+dnl # We check for the new interface rather than detecting the old one.
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_PUT_LINK], [
+ AC_MSG_CHECKING([whether iops->put_link() passes nameidata])
+ ZFS_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+ void put_link(struct inode *ip, void *cookie) { return; }
+ static struct inode_operations iops __attribute__ ((unused)) = {
+ .put_link = put_link,
+ };
+ ],[
+ ],[
+ AC_MSG_RESULT(no)
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_PUT_LINK_NAMEIDATA, 1,
+ [iops->put_link() nameidata])
+ ])
+])
ZFS_AC_KERNEL_MKDIR_UMODE_T
ZFS_AC_KERNEL_LOOKUP_NAMEIDATA
ZFS_AC_KERNEL_CREATE_NAMEIDATA
+ ZFS_AC_KERNEL_FOLLOW_LINK
+ ZFS_AC_KERNEL_PUT_LINK
ZFS_AC_KERNEL_TRUNCATE_RANGE
ZFS_AC_KERNEL_AUTOMOUNT
ZFS_AC_KERNEL_ENCODE_FH_WITH_INODE
return (error);
}
+#ifdef HAVE_FOLLOW_LINK_NAMEIDATA
static void *
zpl_follow_link(struct dentry *dentry, struct nameidata *nd)
+#else
+const char *
+zpl_follow_link(struct dentry *dentry, void **symlink_cookie)
+#endif
{
cred_t *cr = CRED();
struct inode *ip = dentry->d_inode;
cookie = spl_fstrans_mark();
error = -zfs_readlink(ip, &uio, cr);
spl_fstrans_unmark(cookie);
- if (error) {
+
+ if (error)
kmem_free(link, MAXPATHLEN);
+
+ crfree(cr);
+
+#ifdef HAVE_FOLLOW_LINK_NAMEIDATA
+ if (error)
nd_set_link(nd, ERR_PTR(error));
- } else {
+ else
nd_set_link(nd, link);
- }
- crfree(cr);
return (NULL);
+#else
+ if (error)
+ return (ERR_PTR(error));
+ else
+ return (*symlink_cookie = link);
+#endif
}
+#ifdef HAVE_PUT_LINK_NAMEIDATA
static void
zpl_put_link(struct dentry *dentry, struct nameidata *nd, void *ptr)
{
if (!IS_ERR(link))
kmem_free(link, MAXPATHLEN);
}
+#else
+static void
+zpl_put_link(struct inode *unused, void *symlink_cookie)
+{
+ kmem_free(symlink_cookie, MAXPATHLEN);
+}
+#endif
static int
zpl_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)