Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2)  * JFFS2 -- Journalling Flash File System, Version 2.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * Copyright © 2006  NEC Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  * For licensing information, see the file 'LICENCE' in this directory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/time.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/pagemap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/highmem.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/crc32.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/jffs2.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/xattr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/mtd/mtd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/security.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include "nodelist.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) /* ---- Initial Security Label(s) Attachment callback --- */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static int jffs2_initxattrs(struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 			    const struct xattr *xattr_array, void *fs_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	const struct xattr *xattr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	for (xattr = xattr_array; xattr->name != NULL; xattr++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 		err = do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 					xattr->name, xattr->value,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 					xattr->value_len, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 		if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) /* ---- Initial Security Label(s) Attachment ----------- */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) int jffs2_init_security(struct inode *inode, struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 			const struct qstr *qstr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	return security_inode_init_security(inode, dir, qstr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 					    &jffs2_initxattrs, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) /* ---- XATTR Handler for "security.*" ----------------- */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) static int jffs2_security_getxattr(const struct xattr_handler *handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 				   struct dentry *unused, struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 				   const char *name, void *buffer, size_t size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 				   int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	return do_jffs2_getxattr(inode, JFFS2_XPREFIX_SECURITY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 				 name, buffer, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static int jffs2_security_setxattr(const struct xattr_handler *handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 				   struct dentry *unused, struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 				   const char *name, const void *buffer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 				   size_t size, int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	return do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 				 name, buffer, size, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) const struct xattr_handler jffs2_security_xattr_handler = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 	.prefix = XATTR_SECURITY_PREFIX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 	.set = jffs2_security_setxattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 	.get = jffs2_security_getxattr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) };