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Linux 4.8 compat: posix_acl_valid()

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The posix_acl_valid() function has been updated to require a
user namespace.  Filesystem callers should normally provide the
user_ns from the super block associcated with the ACL; the
zpl_posix_acl_valid() wrapper has been added for this purpose.
See https://github.com/torvalds/linux/commit/0d4d717f for
complete details.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Closes #4922
This commit is contained in:
Brian Behlendorf 2016-08-02 11:11:45 -07:00
parent e85a6396b0
commit 4b908d3220
4 changed files with 39 additions and 2 deletions
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24
config/kernel-acl.m4
View File

@ -97,6 +97,30 @@ AC_DEFUN([ZFS_AC_KERNEL_POSIX_ACL_EQUIV_MODE_WANTS_UMODE_T], [
])
])
dnl #
dnl # 4.8 API change,
dnl # The function posix_acl_valid now must be passed a namespace.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_POSIX_ACL_VALID_WITH_NS], [
AC_MSG_CHECKING([whether posix_acl_valid() wants user namespace])
ZFS_LINUX_TRY_COMPILE([
#include <linux/fs.h>
#include <linux/posix_acl.h>
],[
struct user_namespace *user_ns = NULL;
const struct posix_acl *acl = NULL;
int error;
error = posix_acl_valid(user_ns, acl);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_POSIX_ACL_VALID_WITH_NS, 1,
[posix_acl_valid() wants user namespace])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 2.6.27 API change,
dnl # Check if inode_operations contains the function permission

1
config/kernel.m4
View File

@ -43,6 +43,7 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
ZFS_AC_KERNEL_POSIX_ACL_RELEASE
ZFS_AC_KERNEL_POSIX_ACL_CHMOD
ZFS_AC_KERNEL_POSIX_ACL_EQUIV_MODE_WANTS_UMODE_T
ZFS_AC_KERNEL_POSIX_ACL_VALID_WITH_NS
ZFS_AC_KERNEL_INODE_OPERATIONS_PERMISSION
ZFS_AC_KERNEL_INODE_OPERATIONS_PERMISSION_WITH_NAMEIDATA
ZFS_AC_KERNEL_INODE_OPERATIONS_CHECK_ACL

12
include/linux/vfs_compat.h
View File

@ -316,6 +316,18 @@ typedef umode_t zpl_equivmode_t;
#else
typedef mode_t zpl_equivmode_t;
#endif /* HAVE_POSIX_ACL_EQUIV_MODE_UMODE_T */
/*
* 4.8 API change,
* posix_acl_valid() now must be passed a namespace, the namespace from
* from super block associated with the given inode is used for this purpose.
*/
#ifdef HAVE_POSIX_ACL_VALID_WITH_NS
#define zpl_posix_acl_valid(ip, acl) posix_acl_valid(ip->i_sb->s_user_ns, acl)
#else
#define zpl_posix_acl_valid(ip, acl) posix_acl_valid(acl)
#endif
#endif /* CONFIG_FS_POSIX_ACL */
/*

4
module/zfs/zpl_xattr.c
View File

@ -1288,7 +1288,7 @@ __zpl_xattr_acl_set_access(struct inode *ip, const char *name,
if (IS_ERR(acl))
return (PTR_ERR(acl));
else if (acl) {
error = posix_acl_valid(acl);
error = zpl_posix_acl_valid(ip, acl);
if (error) {
zpl_posix_acl_release(acl);
return (error);
@ -1328,7 +1328,7 @@ __zpl_xattr_acl_set_default(struct inode *ip, const char *name,
if (IS_ERR(acl))
return (PTR_ERR(acl));
else if (acl) {
error = posix_acl_valid(acl);
error = zpl_posix_acl_valid(ip, acl);
if (error) {
zpl_posix_acl_release(acl);
return (error);