d9c97ec08b
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
21 lines
554 B
Plaintext
21 lines
554 B
Plaintext
dnl #
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dnl # 4.1 API change
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dnl # struct access file->f_path.dentry was replaced by accessor function
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dnl # since fix torvalds/linux@4bacc9c9234c ("overlayfs: Make f_path always
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dnl # point to the overlay and f_inode to the underlay").
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_FILE_DENTRY], [
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AC_MSG_CHECKING([whether file_dentry() is available])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/fs.h>
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],[
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struct file *f = NULL;
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file_dentry(f);
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_FILE_DENTRY, 1, [file_dentry() is available])
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],[
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AC_MSG_RESULT(no)
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])
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])
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