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Use file_dentry and file_inode wrappers

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Fix bugs due to kernel change in torvalds/linux@4bacc9c923 ("overlayfs:
Make f_path always point to the overlay and f_inode to the underlay").

This problem crashes system when use zfs as a layer of overlayfs.

Signed-off-by: Chen Haiquan <oc@yunify.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #4914
Closes #4935
This commit is contained in:
Chen Haiquan
2016-08-04 23:57:35 +08:00
committed by Brian Behlendorf
parent d5884c3453
commit d9c97ec08b
6 changed files with 41 additions and 9 deletions
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config/kernel-file-dentry.m4
+20
View File
@@ -0,0 +1,20 @@
dnl #
dnl # 4.1 API change
dnl # struct access file->f_path.dentry was replaced by accessor function
dnl # since fix torvalds/linux@4bacc9c9234c ("overlayfs: Make f_path always
dnl # point to the overlay and f_inode to the underlay").
dnl #
AC_DEFUN([ZFS_AC_KERNEL_FILE_DENTRY], [
AC_MSG_CHECKING([whether file_dentry() is available])
ZFS_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
struct file *f = NULL;
file_dentry(f);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_FILE_DENTRY, 1, [file_dentry() is available])
],[
AC_MSG_RESULT(no)
])
])
config/kernel.m4
+1
View File
@@ -56,6 +56,7 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
ZFS_AC_KERNE_GET_ACL_HANDLE_CACHE
ZFS_AC_KERNEL_SHOW_OPTIONS
ZFS_AC_KERNEL_FILE_INODE
ZFS_AC_KERNEL_FILE_DENTRY
ZFS_AC_KERNEL_FSYNC
ZFS_AC_KERNEL_EVICT_INODE
ZFS_AC_KERNEL_DIRTY_INODE_WITH_FLAGS