92 lines
2.2 KiB
C
92 lines
2.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* linux/fs/hfsplus/xattr_trusted.c
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*
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* Vyacheslav Dubeyko <slava@dubeyko.com>
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*
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* Handler for storing security labels as extended attributes.
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*/
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#include <linux/security.h>
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#include <linux/nls.h>
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#include "hfsplus_fs.h"
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#include "xattr.h"
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#include "acl.h"
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static int hfsplus_security_getxattr(const struct xattr_handler *handler,
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struct dentry *unused, struct inode *inode,
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const char *name, void *buffer, size_t size)
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{
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return hfsplus_getxattr(inode, name, buffer, size,
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XATTR_SECURITY_PREFIX,
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XATTR_SECURITY_PREFIX_LEN);
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}
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static int hfsplus_security_setxattr(const struct xattr_handler *handler,
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struct dentry *unused, struct inode *inode,
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const char *name, const void *buffer,
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size_t size, int flags)
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{
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return hfsplus_setxattr(inode, name, buffer, size, flags,
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XATTR_SECURITY_PREFIX,
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XATTR_SECURITY_PREFIX_LEN);
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}
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static int hfsplus_initxattrs(struct inode *inode,
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const struct xattr *xattr_array,
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void *fs_info)
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{
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const struct xattr *xattr;
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char *xattr_name;
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int err = 0;
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xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1,
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GFP_KERNEL);
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if (!xattr_name)
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return -ENOMEM;
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for (xattr = xattr_array; xattr->name != NULL; xattr++) {
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if (!strcmp(xattr->name, ""))
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continue;
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strcpy(xattr_name, XATTR_SECURITY_PREFIX);
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strcpy(xattr_name +
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XATTR_SECURITY_PREFIX_LEN, xattr->name);
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memset(xattr_name +
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XATTR_SECURITY_PREFIX_LEN + strlen(xattr->name), 0, 1);
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err = __hfsplus_setxattr(inode, xattr_name,
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xattr->value, xattr->value_len, 0);
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if (err)
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break;
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}
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kfree(xattr_name);
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return err;
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}
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int hfsplus_init_security(struct inode *inode, struct inode *dir,
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const struct qstr *qstr)
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{
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return security_inode_init_security(inode, dir, qstr,
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&hfsplus_initxattrs, NULL);
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}
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int hfsplus_init_inode_security(struct inode *inode,
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struct inode *dir,
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const struct qstr *qstr)
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{
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int err;
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err = hfsplus_init_posix_acl(inode, dir);
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if (!err)
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err = hfsplus_init_security(inode, dir, qstr);
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return err;
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}
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const struct xattr_handler hfsplus_xattr_security_handler = {
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.prefix = XATTR_SECURITY_PREFIX,
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.get = hfsplus_security_getxattr,
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.set = hfsplus_security_setxattr,
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};
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