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| dnl # The follow_link() interface has been replaced by |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