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Linux 4.9 compat: inode_change_ok() renamed setattr_prepare() 

In torvalds/linux@31051c8 the inode_change_ok() function was
renamed setattr_prepare() and updated to take a dentry ratheri
than an inode.  Update the code to call the setattr_prepare()
and add a wrapper function which call inode_change_ok() for
older kernels.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
This commit is contained in:
Brian Behlendorf 2016-10-18 23:49:23 +00:00
parent 670508f080
commit f85c85ea06
4 changed files with 36 additions and 1 deletions
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23
config/kernel-setattr-prepare.m4 Normal file
View File

@ -0,0 +1,23 @@
dnl #
dnl # 4.9 API change
dnl # The inode_change_ok() function has been renamed setattr_prepare()
dnl # and updated to take a dentry rather than an inode.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SETATTR_PREPARE],
[AC_MSG_CHECKING([whether setattr_prepare() is available])
ZFS_LINUX_TRY_COMPILE_SYMBOL([
#include <linux/fs.h>
], [
struct dentry *dentry = NULL;
struct iattr *attr = NULL;
int error;
error = setattr_prepare(dentry, attr);
], [setattr_prepare], [fs/attr.c], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_SETATTR_PREPARE, 1,
[setattr_prepare() is available])
], [
AC_MSG_RESULT(no)
])
])

1
config/kernel.m4
View File

@ -72,6 +72,7 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
ZFS_AC_KERNEL_ENCODE_FH_WITH_INODE
ZFS_AC_KERNEL_COMMIT_METADATA
ZFS_AC_KERNEL_CLEAR_INODE
ZFS_AC_KERNEL_SETATTR_PREPARE
ZFS_AC_KERNEL_INSERT_INODE_LOCKED
ZFS_AC_KERNEL_D_MAKE_ROOT
ZFS_AC_KERNEL_D_OBTAIN_ALIAS

11
include/linux/vfs_compat.h
View File

@ -362,4 +362,15 @@ static inline struct inode *file_inode(const struct file *f)
#define zpl_follow_up(path) follow_up(path)
#endif
/*
* 4.9 API change
*/
#ifndef HAVE_SETATTR_PREPARE
static inline int
setattr_prepare(struct dentry *dentry, struct iattr *ia)
{
return (inode_change_ok(dentry->d_inode, ia));
}
#endif
#endif /* _ZFS_VFS_H */

2
module/zfs/zpl_inode.c
View File

@ -324,7 +324,7 @@ zpl_setattr(struct dentry *dentry, struct iattr *ia)
int error;
fstrans_cookie_t cookie;
error = inode_change_ok(ip, ia);
error = setattr_prepare(dentry, ia);
if (error)
return (error);