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/xattr.h>
15 #include <linux/gfs2_ondisk.h>
16 #include <linux/lm_interface.h>
17 #include <asm/uaccess.h>
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)
37 if (strncmp(name, "system.", 7) == 0) {
38 type = GFS2_EATYPE_SYS;
40 *truncated_name = name + sizeof("system.") - 1;
41 } else if (strncmp(name, "user.", 5) == 0) {
42 type = GFS2_EATYPE_USR;
44 *truncated_name = name + sizeof("user.") - 1;
45 } else if (strncmp(name, "security.", 9) == 0) {
46 type = GFS2_EATYPE_SECURITY;
48 *truncated_name = name + sizeof("security.") - 1;
50 type = GFS2_EATYPE_UNUSED;
52 *truncated_name = NULL;
58 static int user_eo_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
60 struct inode *inode = &ip->i_inode;
61 int error = permission(inode, MAY_READ, NULL);
65 return gfs2_ea_get_i(ip, er);
68 static int user_eo_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
70 struct inode *inode = &ip->i_inode;
72 if (S_ISREG(inode->i_mode) ||
73 (S_ISDIR(inode->i_mode) && !(inode->i_mode & S_ISVTX))) {
74 int error = permission(inode, MAY_WRITE, NULL);
80 return gfs2_ea_set_i(ip, er);
83 static int user_eo_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
85 struct inode *inode = &ip->i_inode;
87 if (S_ISREG(inode->i_mode) ||
88 (S_ISDIR(inode->i_mode) && !(inode->i_mode & S_ISVTX))) {
89 int error = permission(inode, MAY_WRITE, NULL);
95 return gfs2_ea_remove_i(ip, er);
98 static int system_eo_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
100 if (!GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len) &&
101 !GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len) &&
102 !capable(CAP_SYS_ADMIN))
105 if (GFS2_SB(&ip->i_inode)->sd_args.ar_posix_acl == 0 &&
106 (GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len) ||
107 GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len)))
112 return gfs2_ea_get_i(ip, er);
115 static int system_eo_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
120 if (GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len)) {
121 if (!(er->er_flags & GFS2_ERF_MODE)) {
122 er->er_mode = ip->i_inode.i_mode;
123 er->er_flags |= GFS2_ERF_MODE;
125 error = gfs2_acl_validate_set(ip, 1, er,
126 &remove, &er->er_mode);
129 error = gfs2_ea_set_i(ip, er);
133 gfs2_ea_remove_i(ip, er);
136 } else if (GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len)) {
137 error = gfs2_acl_validate_set(ip, 0, er,
142 error = gfs2_ea_set_i(ip, er);
144 error = gfs2_ea_remove_i(ip, er);
145 if (error == -ENODATA)
154 static int system_eo_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
156 if (GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len)) {
157 int error = gfs2_acl_validate_remove(ip, 1);
161 } else if (GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len)) {
162 int error = gfs2_acl_validate_remove(ip, 0);
169 return gfs2_ea_remove_i(ip, er);
172 static int security_eo_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
174 struct inode *inode = &ip->i_inode;
175 int error = permission(inode, MAY_READ, NULL);
179 return gfs2_ea_get_i(ip, er);
182 static int security_eo_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
184 struct inode *inode = &ip->i_inode;
185 int error = permission(inode, MAY_WRITE, NULL);
189 return gfs2_ea_set_i(ip, er);
192 static int security_eo_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
194 struct inode *inode = &ip->i_inode;
195 int error = permission(inode, MAY_WRITE, NULL);
199 return gfs2_ea_remove_i(ip, er);
202 static struct gfs2_eattr_operations gfs2_user_eaops = {
203 .eo_get = user_eo_get,
204 .eo_set = user_eo_set,
205 .eo_remove = user_eo_remove,
209 struct gfs2_eattr_operations gfs2_system_eaops = {
210 .eo_get = system_eo_get,
211 .eo_set = system_eo_set,
212 .eo_remove = system_eo_remove,
216 static struct gfs2_eattr_operations gfs2_security_eaops = {
217 .eo_get = security_eo_get,
218 .eo_set = security_eo_set,
219 .eo_remove = security_eo_remove,
220 .eo_name = "security",
223 struct gfs2_eattr_operations *gfs2_ea_ops[] = {
227 &gfs2_security_eaops,