From: Yuxuan Shui <yshuiv7@gmail.com>
Date: Fri, 12 Oct 2012 15:20:58 +0000 (+0800)
Subject: Linux 3.6 compat, iops->create()
X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=commitdiff_plain;h=558ef6d0805457654938dbe56c9a19b0121a712d;p=zfs.git

Linux 3.6 compat, iops->create()

As of Linux commit ebfc3b49a7ac25920cb5be5445f602e51d2ea559 the
struct nameidata is no longer passed to iops->create.  Instead
only the result of (inamedata->flags & LOOKUP_EXCL) is passed.

ZFS like almost all Linux fileystems never made use of this so
only the prototype needs to be wrapped for compatibility.

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #873
---

diff --git a/config/kernel-create-nameidata.m4 b/config/kernel-create-nameidata.m4
new file mode 100644
index 0000000..100f077
--- /dev/null
+++ b/config/kernel-create-nameidata.m4
@@ -0,0 +1,26 @@
+dnl #
+dnl # 3.6 API change
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_CREATE_NAMEIDATA], [
+	AC_MSG_CHECKING([whether iops->create() takes struct nameidata])
+	ZFS_LINUX_TRY_COMPILE([
+		#include <linux/fs.h>
+	],[
+		#ifdef HAVE_MKDIR_UMODE_T
+		int (*inode_create) (struct inode *,struct dentry *,
+		                     umode_t, struct nameidata *) = NULL;
+		#else
+		int (*inode_create) (struct inode *,struct dentry *,
+		                     int, struct nameidata *) = NULL;
+		#endif
+		struct inode_operations iops __attribute__ ((unused)) = {
+			.create		= inode_create,
+		};
+	],[
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_CREATE_NAMEIDATA, 1,
+		          [iops->create() operation takes nameidata])
+	],[
+		AC_MSG_RESULT(no)
+	])
+])
diff --git a/config/kernel.m4 b/config/kernel.m4
index 8d8cd6b..dd01fb2 100644
--- a/config/kernel.m4
+++ b/config/kernel.m4
@@ -50,6 +50,7 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
 	ZFS_AC_KERNEL_FREE_CACHED_OBJECTS
 	ZFS_AC_KERNEL_FALLOCATE
 	ZFS_AC_KERNEL_LOOKUP_NAMEIDATA
+	ZFS_AC_KERNEL_CREATE_NAMEIDATA
 	ZFS_AC_KERNEL_TRUNCATE_RANGE
 	ZFS_AC_KERNEL_CREATE_UMODE_T
 	ZFS_AC_KERNEL_AUTOMOUNT
diff --git a/module/zfs/zpl_inode.c b/module/zfs/zpl_inode.c
index 5b31c12..bb389f8 100644
--- a/module/zfs/zpl_inode.c
+++ b/module/zfs/zpl_inode.c
@@ -75,8 +75,13 @@ zpl_vap_init(vattr_t *vap, struct inode *dir, struct dentry *dentry,
 }
 
 static int
+#ifdef HAVE_CREATE_NAMEIDATA
 zpl_create(struct inode *dir, struct dentry *dentry, zpl_umode_t mode,
     struct nameidata *nd)
+#else
+zpl_create(struct inode *dir, struct dentry *dentry, zpl_umode_t mode,
+    bool flag)
+#endif
 {
 	cred_t *cr = CRED();
 	struct inode *ip;