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Linux 3.5 compat, eops->encode_fh() takes inodes

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The export_operations member ->encode_fh() has been updated to
take both the child and parent inodes.  This interface used to
take the child dentry and a bool describing if the parent is needed.

NOTE: While updating this code I noticed that we do not currently
cleanly handle the case where we're passed a connectable parent.
This code should be audited to make sure we're doing the right thing.

Signed-off-by: Richard Yao <ryao@cs.stonybrook.edu>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #784
This commit is contained in:
Richard Yao
2012-07-23 10:55:48 -07:00
committed by Brian Behlendorf
parent ed3fc80048
commit 756c3e5a9c
60 changed files with 227 additions and 1 deletions
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config/kernel-encode-fh-inode.m4
+24
View File
@@ -0,0 +1,24 @@
dnl #
dnl # 3.5.0 API change
dnl # torvalds/linux@b0b0382bb4904965a9e9fca77ad87514dfda0d1c changed the
dnl # ->encode_fh() callback to pass the child inode and its parents inode
dnl # rather than a dentry and a boolean saying whether we want the parent.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_ENCODE_FH_WITH_INODE], [
AC_MSG_CHECKING([whether eops->encode_fh() wants inode])
ZFS_LINUX_TRY_COMPILE([
#include <linux/exportfs.h>
int encode_fh(struct inode *inode, __u32 *fh, int *max_len,
struct inode *parent) { return 0; }
static struct export_operations eops __attribute__ ((unused))={
.encode_fh = encode_fh,
};
],[
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_ENCODE_FH_WITH_INODE, 1,
[eops->encode_fh() wants child and parent inodes])
],[
AC_MSG_RESULT(no)
])
])
config/kernel.m4
+1
View File
@@ -49,6 +49,7 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
ZFS_AC_KERNEL_FALLOCATE
ZFS_AC_KERNEL_CREATE_UMODE_T
ZFS_AC_KERNEL_AUTOMOUNT
ZFS_AC_KERNEL_ENCODE_FH_WITH_INODE
ZFS_AC_KERNEL_INSERT_INODE_LOCKED
ZFS_AC_KERNEL_D_MAKE_ROOT
ZFS_AC_KERNEL_D_OBTAIN_ALIAS