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/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 <linux/lm_interface.h>
18 #include <asm/uaccess.h>
28 * gfs2_ea_name2type - get the type of the ea, and truncate type from the name
29 * @namep: ea name, possibly with type appended
31 * Returns: GFS2_EATYPE_XXX
34 unsigned int gfs2_ea_name2type(const char *name, const char **truncated_name)
38 if (strncmp(name, "system.", 7) == 0) {
39 type = GFS2_EATYPE_SYS;
41 *truncated_name = name + sizeof("system.") - 1;
42 } else if (strncmp(name, "user.", 5) == 0) {
43 type = GFS2_EATYPE_USR;
45 *truncated_name = name + sizeof("user.") - 1;
46 } else if (strncmp(name, "security.", 9) == 0) {
47 type = GFS2_EATYPE_SECURITY;
49 *truncated_name = name + sizeof("security.") - 1;
51 type = GFS2_EATYPE_UNUSED;
53 *truncated_name = NULL;
59 static int user_eo_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
61 struct inode *inode = &ip->i_inode;
62 int error = permission(inode, MAY_READ, NULL);
66 return gfs2_ea_get_i(ip, er);
69 static int user_eo_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
71 struct inode *inode = &ip->i_inode;
73 if (S_ISREG(inode->i_mode) ||
74 (S_ISDIR(inode->i_mode) && !(inode->i_mode & S_ISVTX))) {
75 int error = permission(inode, MAY_WRITE, NULL);
81 return gfs2_ea_set_i(ip, er);
84 static int user_eo_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
86 struct inode *inode = &ip->i_inode;
88 if (S_ISREG(inode->i_mode) ||
89 (S_ISDIR(inode->i_mode) && !(inode->i_mode & S_ISVTX))) {
90 int error = permission(inode, MAY_WRITE, NULL);
96 return gfs2_ea_remove_i(ip, er);
99 static int system_eo_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
101 if (!GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len) &&
102 !GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len) &&
103 !capable(CAP_SYS_ADMIN))
106 if (GFS2_SB(&ip->i_inode)->sd_args.ar_posix_acl == 0 &&
107 (GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len) ||
108 GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len)))
113 return gfs2_ea_get_i(ip, er);
116 static int system_eo_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
121 if (GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len)) {
122 if (!(er->er_flags & GFS2_ERF_MODE)) {
123 er->er_mode = ip->i_inode.i_mode;
124 er->er_flags |= GFS2_ERF_MODE;
126 error = gfs2_acl_validate_set(ip, 1, er,
127 &remove, &er->er_mode);
130 error = gfs2_ea_set_i(ip, er);
134 gfs2_ea_remove_i(ip, er);
137 } else if (GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len)) {
138 error = gfs2_acl_validate_set(ip, 0, er,
143 error = gfs2_ea_set_i(ip, er);
145 error = gfs2_ea_remove_i(ip, er);
146 if (error == -ENODATA)
155 static int system_eo_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
157 if (GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len)) {
158 int error = gfs2_acl_validate_remove(ip, 1);
162 } else if (GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len)) {
163 int error = gfs2_acl_validate_remove(ip, 0);
170 return gfs2_ea_remove_i(ip, er);
173 static int security_eo_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
175 struct inode *inode = &ip->i_inode;
176 int error = permission(inode, MAY_READ, NULL);
180 return gfs2_ea_get_i(ip, er);
183 static int security_eo_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
185 struct inode *inode = &ip->i_inode;
186 int error = permission(inode, MAY_WRITE, NULL);
190 return gfs2_ea_set_i(ip, er);
193 static int security_eo_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
195 struct inode *inode = &ip->i_inode;
196 int error = permission(inode, MAY_WRITE, NULL);
200 return gfs2_ea_remove_i(ip, er);
203 static struct gfs2_eattr_operations gfs2_user_eaops = {
204 .eo_get = user_eo_get,
205 .eo_set = user_eo_set,
206 .eo_remove = user_eo_remove,
210 struct gfs2_eattr_operations gfs2_system_eaops = {
211 .eo_get = system_eo_get,
212 .eo_set = system_eo_set,
213 .eo_remove = system_eo_remove,
217 static struct gfs2_eattr_operations gfs2_security_eaops = {
218 .eo_get = security_eo_get,
219 .eo_set = security_eo_set,
220 .eo_remove = security_eo_remove,
221 .eo_name = "security",
224 struct gfs2_eattr_operations *gfs2_ea_ops[] = {
228 &gfs2_security_eaops,