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git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - fs/gfs2/acl.c
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
10 #include <linux/sched.h>
11 #include <linux/slab.h>
12 #include <linux/spinlock.h>
13 #include <linux/completion.h>
14 #include <linux/buffer_head.h>
15 #include <linux/xattr.h>
16 #include <linux/posix_acl.h>
17 #include <linux/posix_acl_xattr.h>
18 #include <linux/gfs2_ondisk.h>
30 static const char *gfs2_acl_name(int type
)
34 return GFS2_POSIX_ACL_ACCESS
;
35 case ACL_TYPE_DEFAULT
:
36 return GFS2_POSIX_ACL_DEFAULT
;
41 struct posix_acl
*gfs2_get_acl(struct inode
*inode
, int type
)
43 struct gfs2_inode
*ip
= GFS2_I(inode
);
44 struct posix_acl
*acl
;
52 name
= gfs2_acl_name(type
);
54 return ERR_PTR(-EINVAL
);
56 len
= gfs2_xattr_acl_get(ip
, name
, &data
);
62 acl
= posix_acl_from_xattr(&init_user_ns
, data
, len
);
67 int gfs2_set_acl(struct inode
*inode
, struct posix_acl
*acl
, int type
)
72 const char *name
= gfs2_acl_name(type
);
76 if (acl
->a_count
> GFS2_ACL_MAX_ENTRIES(GFS2_SB(inode
)))
79 if (type
== ACL_TYPE_ACCESS
) {
80 umode_t mode
= inode
->i_mode
;
82 error
= posix_acl_equiv_mode(acl
, &mode
);
89 if (mode
!= inode
->i_mode
) {
91 mark_inode_dirty(inode
);
96 len
= posix_acl_to_xattr(&init_user_ns
, acl
, NULL
, 0);
99 data
= kmalloc(len
, GFP_NOFS
);
102 error
= posix_acl_to_xattr(&init_user_ns
, acl
, data
, len
);
110 error
= __gfs2_xattr_set(inode
, name
, data
, len
, 0, GFS2_EATYPE_SYS
);
115 set_cached_acl(inode
, type
, acl
);
117 forget_cached_acl(inode
, type
);