PM / yenta: Split resume into early and late parts (rev. 4)
[linux/fpc-iii.git] / fs / gfs2 / eaops.c
blobdee9b03e5b37a165c74a6f0791acc32cfffbf691
1 /*
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.
8 */
10 #include <linux/slab.h>
11 #include <linux/spinlock.h>
12 #include <linux/completion.h>
13 #include <linux/buffer_head.h>
14 #include <linux/capability.h>
15 #include <linux/xattr.h>
16 #include <linux/gfs2_ondisk.h>
17 #include <asm/uaccess.h>
19 #include "gfs2.h"
20 #include "incore.h"
21 #include "acl.h"
22 #include "eaops.h"
23 #include "eattr.h"
24 #include "util.h"
26 /**
27 * gfs2_ea_name2type - get the type of the ea, and truncate type from the name
28 * @namep: ea name, possibly with type appended
30 * Returns: GFS2_EATYPE_XXX
33 unsigned int gfs2_ea_name2type(const char *name, const char **truncated_name)
35 unsigned int type;
37 if (strncmp(name, "system.", 7) == 0) {
38 type = GFS2_EATYPE_SYS;
39 if (truncated_name)
40 *truncated_name = name + sizeof("system.") - 1;
41 } else if (strncmp(name, "user.", 5) == 0) {
42 type = GFS2_EATYPE_USR;
43 if (truncated_name)
44 *truncated_name = name + sizeof("user.") - 1;
45 } else if (strncmp(name, "security.", 9) == 0) {
46 type = GFS2_EATYPE_SECURITY;
47 if (truncated_name)
48 *truncated_name = name + sizeof("security.") - 1;
49 } else {
50 type = GFS2_EATYPE_UNUSED;
51 if (truncated_name)
52 *truncated_name = NULL;
55 return type;
58 static int system_eo_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
60 if (!GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len) &&
61 !GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len) &&
62 !capable(CAP_SYS_ADMIN))
63 return -EPERM;
65 if (GFS2_SB(&ip->i_inode)->sd_args.ar_posix_acl == 0 &&
66 (GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len) ||
67 GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len)))
68 return -EOPNOTSUPP;
70 return gfs2_ea_get_i(ip, er);
73 static int system_eo_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
75 int remove = 0;
76 int error;
78 if (GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len)) {
79 if (!(er->er_flags & GFS2_ERF_MODE)) {
80 er->er_mode = ip->i_inode.i_mode;
81 er->er_flags |= GFS2_ERF_MODE;
83 error = gfs2_acl_validate_set(ip, 1, er,
84 &remove, &er->er_mode);
85 if (error)
86 return error;
87 error = gfs2_ea_set_i(ip, er);
88 if (error)
89 return error;
90 if (remove)
91 gfs2_ea_remove_i(ip, er);
92 return 0;
94 } else if (GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len)) {
95 error = gfs2_acl_validate_set(ip, 0, er,
96 &remove, NULL);
97 if (error)
98 return error;
99 if (!remove)
100 error = gfs2_ea_set_i(ip, er);
101 else {
102 error = gfs2_ea_remove_i(ip, er);
103 if (error == -ENODATA)
104 error = 0;
106 return error;
109 return -EPERM;
112 static int system_eo_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
114 if (GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len)) {
115 int error = gfs2_acl_validate_remove(ip, 1);
116 if (error)
117 return error;
119 } else if (GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len)) {
120 int error = gfs2_acl_validate_remove(ip, 0);
121 if (error)
122 return error;
124 } else
125 return -EPERM;
127 return gfs2_ea_remove_i(ip, er);
130 static const struct gfs2_eattr_operations gfs2_user_eaops = {
131 .eo_get = gfs2_ea_get_i,
132 .eo_set = gfs2_ea_set_i,
133 .eo_remove = gfs2_ea_remove_i,
134 .eo_name = "user",
137 const struct gfs2_eattr_operations gfs2_system_eaops = {
138 .eo_get = system_eo_get,
139 .eo_set = system_eo_set,
140 .eo_remove = system_eo_remove,
141 .eo_name = "system",
144 static const struct gfs2_eattr_operations gfs2_security_eaops = {
145 .eo_get = gfs2_ea_get_i,
146 .eo_set = gfs2_ea_set_i,
147 .eo_remove = gfs2_ea_remove_i,
148 .eo_name = "security",
151 const struct gfs2_eattr_operations *gfs2_ea_ops[] = {
152 NULL,
153 &gfs2_user_eaops,
154 &gfs2_system_eaops,
155 &gfs2_security_eaops,