linux/fs/jfs/jfs_xattr.h
Wedson Almeida Filho ea780283e2
jfs: move jfs_xattr_handlers to .rodata
This makes it harder for accidental or malicious changes to
jfs_xattr_handlers at runtime.

Cc: Dave Kleikamp <shaggy@kernel.org>
Cc: jfs-discussion@lists.sourceforge.net
Signed-off-by: Wedson Almeida Filho <walmeida@microsoft.com>
Link: https://lore.kernel.org/r/20230930050033.41174-17-wedsonaf@gmail.com
Reviewed-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2023-10-09 16:24:19 +02:00

63 lines
1.8 KiB
C

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) International Business Machines Corp., 2000-2002
*/
#ifndef H_JFS_XATTR
#define H_JFS_XATTR
#include <linux/xattr.h>
/*
* jfs_ea_list describe the on-disk format of the extended attributes.
* I know the null-terminator is redundant since namelen is stored, but
* I am maintaining compatibility with OS/2 where possible.
*/
struct jfs_ea {
u8 flag; /* Unused? */
u8 namelen; /* Length of name */
__le16 valuelen; /* Length of value */
char name[]; /* Attribute name (includes null-terminator) */
}; /* Value immediately follows name */
struct jfs_ea_list {
__le32 size; /* overall size */
struct jfs_ea ea[]; /* Variable length list */
};
/* Macros for defining maximum number of bytes supported for EAs */
#define MAXEASIZE 65535
#define MAXEALISTSIZE MAXEASIZE
/*
* some macros for dealing with variable length EA lists.
*/
#define EA_SIZE(ea) \
(sizeof (struct jfs_ea) + (ea)->namelen + 1 + \
le16_to_cpu((ea)->valuelen))
#define NEXT_EA(ea) ((struct jfs_ea *) (((char *) (ea)) + (EA_SIZE (ea))))
#define FIRST_EA(ealist) ((ealist)->ea)
#define EALIST_SIZE(ealist) le32_to_cpu((ealist)->size)
#define END_EALIST(ealist) \
((struct jfs_ea *) (((char *) (ealist)) + EALIST_SIZE(ealist)))
extern int __jfs_setxattr(tid_t, struct inode *, const char *, const void *,
size_t, int);
extern ssize_t __jfs_getxattr(struct inode *, const char *, void *, size_t);
extern ssize_t jfs_listxattr(struct dentry *, char *, size_t);
extern const struct xattr_handler * const jfs_xattr_handlers[];
#ifdef CONFIG_JFS_SECURITY
extern int jfs_init_security(tid_t, struct inode *, struct inode *,
const struct qstr *);
#else
static inline int jfs_init_security(tid_t tid, struct inode *inode,
struct inode *dir, const struct qstr *qstr)
{
return 0;
}
#endif
#endif /* H_JFS_XATTR */