87 lines
2.1 KiB
C
87 lines
2.1 KiB
C
/*
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* JFFS2 -- Journalling Flash File System, Version 2.
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*
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* Copyright © 2006 NEC Corporation
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*
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* Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
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*
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* For licensing information, see the file 'LICENCE' in this directory.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/fs.h>
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#include <linux/time.h>
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#include <linux/pagemap.h>
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#include <linux/highmem.h>
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#include <linux/crc32.h>
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#include <linux/jffs2.h>
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#include <linux/xattr.h>
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#include <linux/mtd/mtd.h>
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#include <linux/security.h>
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#include "nodelist.h"
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/* ---- Initial Security Label Attachment -------------- */
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int jffs2_init_security(struct inode *inode, struct inode *dir,
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const struct qstr *qstr)
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{
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int rc;
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size_t len;
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void *value;
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char *name;
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rc = security_inode_init_security(inode, dir, qstr, &name, &value, &len);
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if (rc) {
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if (rc == -EOPNOTSUPP)
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return 0;
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return rc;
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}
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rc = do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY, name, value, len, 0);
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kfree(name);
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kfree(value);
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return rc;
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}
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/* ---- XATTR Handler for "security.*" ----------------- */
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static int jffs2_security_getxattr(struct dentry *dentry, const char *name,
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void *buffer, size_t size, int type)
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{
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if (!strcmp(name, ""))
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return -EINVAL;
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return do_jffs2_getxattr(dentry->d_inode, JFFS2_XPREFIX_SECURITY,
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name, buffer, size);
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}
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static int jffs2_security_setxattr(struct dentry *dentry, const char *name,
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const void *buffer, size_t size, int flags, int type)
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{
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if (!strcmp(name, ""))
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return -EINVAL;
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return do_jffs2_setxattr(dentry->d_inode, JFFS2_XPREFIX_SECURITY,
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name, buffer, size, flags);
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}
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static size_t jffs2_security_listxattr(struct dentry *dentry, char *list,
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size_t list_size, const char *name, size_t name_len, int type)
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{
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size_t retlen = XATTR_SECURITY_PREFIX_LEN + name_len + 1;
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if (list && retlen <= list_size) {
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strcpy(list, XATTR_SECURITY_PREFIX);
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strcpy(list + XATTR_SECURITY_PREFIX_LEN, name);
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}
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return retlen;
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}
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const struct xattr_handler jffs2_security_xattr_handler = {
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.prefix = XATTR_SECURITY_PREFIX,
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.list = jffs2_security_listxattr,
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.set = jffs2_security_setxattr,
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.get = jffs2_security_getxattr
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};
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