mm: fix exec activate_mm vs TLB shootdown and lazy tlb switching race
[linux/fpc-iii.git] / fs / hfsplus / xattr_security.c
blobf5550b006e8810bd43d5c2680bf80f55b3fcd511
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * linux/fs/hfsplus/xattr_trusted.c
5 * Vyacheslav Dubeyko <slava@dubeyko.com>
7 * Handler for storing security labels as extended attributes.
8 */
10 #include <linux/security.h>
11 #include <linux/nls.h>
13 #include "hfsplus_fs.h"
14 #include "xattr.h"
15 #include "acl.h"
17 static int hfsplus_security_getxattr(const struct xattr_handler *handler,
18 struct dentry *unused, struct inode *inode,
19 const char *name, void *buffer, size_t size)
21 return hfsplus_getxattr(inode, name, buffer, size,
22 XATTR_SECURITY_PREFIX,
23 XATTR_SECURITY_PREFIX_LEN);
26 static int hfsplus_security_setxattr(const struct xattr_handler *handler,
27 struct dentry *unused, struct inode *inode,
28 const char *name, const void *buffer,
29 size_t size, int flags)
31 return hfsplus_setxattr(inode, name, buffer, size, flags,
32 XATTR_SECURITY_PREFIX,
33 XATTR_SECURITY_PREFIX_LEN);
36 static int hfsplus_initxattrs(struct inode *inode,
37 const struct xattr *xattr_array,
38 void *fs_info)
40 const struct xattr *xattr;
41 char *xattr_name;
42 int err = 0;
44 xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1,
45 GFP_KERNEL);
46 if (!xattr_name)
47 return -ENOMEM;
48 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
50 if (!strcmp(xattr->name, ""))
51 continue;
53 strcpy(xattr_name, XATTR_SECURITY_PREFIX);
54 strcpy(xattr_name +
55 XATTR_SECURITY_PREFIX_LEN, xattr->name);
56 memset(xattr_name +
57 XATTR_SECURITY_PREFIX_LEN + strlen(xattr->name), 0, 1);
59 err = __hfsplus_setxattr(inode, xattr_name,
60 xattr->value, xattr->value_len, 0);
61 if (err)
62 break;
64 kfree(xattr_name);
65 return err;
68 int hfsplus_init_security(struct inode *inode, struct inode *dir,
69 const struct qstr *qstr)
71 return security_inode_init_security(inode, dir, qstr,
72 &hfsplus_initxattrs, NULL);
75 int hfsplus_init_inode_security(struct inode *inode,
76 struct inode *dir,
77 const struct qstr *qstr)
79 int err;
81 err = hfsplus_init_posix_acl(inode, dir);
82 if (!err)
83 err = hfsplus_init_security(inode, dir, qstr);
84 return err;
87 const struct xattr_handler hfsplus_xattr_security_handler = {
88 .prefix = XATTR_SECURITY_PREFIX,
89 .get = hfsplus_security_getxattr,
90 .set = hfsplus_security_setxattr,