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>
31 static const char *gfs2_acl_name(int type
)
35 return XATTR_POSIX_ACL_ACCESS
;
36 case ACL_TYPE_DEFAULT
:
37 return XATTR_POSIX_ACL_DEFAULT
;
42 static struct posix_acl
*__gfs2_get_acl(struct inode
*inode
, int type
)
44 struct gfs2_inode
*ip
= GFS2_I(inode
);
45 struct posix_acl
*acl
;
53 name
= gfs2_acl_name(type
);
54 len
= gfs2_xattr_acl_get(ip
, name
, &data
);
57 acl
= posix_acl_from_xattr(&init_user_ns
, data
, len
);
62 struct posix_acl
*gfs2_get_acl(struct inode
*inode
, int type
)
64 struct gfs2_inode
*ip
= GFS2_I(inode
);
65 struct gfs2_holder gh
;
66 bool need_unlock
= false;
67 struct posix_acl
*acl
;
69 if (!gfs2_glock_is_locked_by_me(ip
->i_gl
)) {
70 int ret
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
,
76 acl
= __gfs2_get_acl(inode
, type
);
78 gfs2_glock_dq_uninit(&gh
);
82 int __gfs2_set_acl(struct inode
*inode
, struct posix_acl
*acl
, int type
)
87 const char *name
= gfs2_acl_name(type
);
89 if (acl
&& acl
->a_count
> GFS2_ACL_MAX_ENTRIES(GFS2_SB(inode
)))
92 if (type
== ACL_TYPE_ACCESS
) {
93 umode_t mode
= inode
->i_mode
;
95 error
= posix_acl_equiv_mode(acl
, &mode
);
102 if (mode
!= inode
->i_mode
) {
103 inode
->i_mode
= mode
;
104 mark_inode_dirty(inode
);
109 len
= posix_acl_to_xattr(&init_user_ns
, acl
, NULL
, 0);
112 data
= kmalloc(len
, GFP_NOFS
);
115 error
= posix_acl_to_xattr(&init_user_ns
, acl
, data
, len
);
123 error
= __gfs2_xattr_set(inode
, name
, data
, len
, 0, GFS2_EATYPE_SYS
);
126 set_cached_acl(inode
, type
, acl
);
132 int gfs2_set_acl(struct inode
*inode
, struct posix_acl
*acl
, int type
)
134 struct gfs2_inode
*ip
= GFS2_I(inode
);
135 struct gfs2_holder gh
;
136 bool need_unlock
= false;
139 ret
= gfs2_rsqa_alloc(ip
);
143 if (!gfs2_glock_is_locked_by_me(ip
->i_gl
)) {
144 ret
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &gh
);
149 ret
= __gfs2_set_acl(inode
, acl
, type
);
151 gfs2_glock_dq_uninit(&gh
);
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