linux/fs/ext2/xattr.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
  File: linux/ext2_xattr.h

  On-disk format of extended attributes for the ext2 filesystem.

  (C) 2001 Andreas Gruenbacher, <[email protected]>
*/

#include <linux/init.h>
#include <linux/xattr.h>

/* Magic value in attribute blocks */
#define EXT2_XATTR_MAGIC …

/* Maximum number of references to one attribute block */
#define EXT2_XATTR_REFCOUNT_MAX …

/* Name indexes */
#define EXT2_XATTR_INDEX_USER …
#define EXT2_XATTR_INDEX_POSIX_ACL_ACCESS …
#define EXT2_XATTR_INDEX_POSIX_ACL_DEFAULT …
#define EXT2_XATTR_INDEX_TRUSTED …
#define EXT2_XATTR_INDEX_LUSTRE …
#define EXT2_XATTR_INDEX_SECURITY …

struct ext2_xattr_header { … };

struct ext2_xattr_entry { … };

#define EXT2_XATTR_PAD_BITS …
#define EXT2_XATTR_PAD …
#define EXT2_XATTR_ROUND …
#define EXT2_XATTR_LEN(name_len) …
#define EXT2_XATTR_NEXT(entry) …
#define EXT2_XATTR_SIZE(size) …

struct mb_cache;

# ifdef CONFIG_EXT2_FS_XATTR

extern const struct xattr_handler ext2_xattr_user_handler;
extern const struct xattr_handler ext2_xattr_trusted_handler;
extern const struct xattr_handler ext2_xattr_security_handler;

extern ssize_t ext2_listxattr(struct dentry *, char *, size_t);

extern int ext2_xattr_get(struct inode *, int, const char *, void *, size_t);
extern int ext2_xattr_set(struct inode *, int, const char *, const void *, size_t, int);

extern void ext2_xattr_delete_inode(struct inode *);

extern struct mb_cache *ext2_xattr_create_cache(void);
extern void ext2_xattr_destroy_cache(struct mb_cache *cache);

extern const struct xattr_handler * const ext2_xattr_handlers[];

# else  /* CONFIG_EXT2_FS_XATTR */

static inline int
ext2_xattr_get(struct inode *inode, int name_index,
	       const char *name, void *buffer, size_t size)
{
	return -EOPNOTSUPP;
}

static inline int
ext2_xattr_set(struct inode *inode, int name_index, const char *name,
	       const void *value, size_t size, int flags)
{
	return -EOPNOTSUPP;
}

static inline void
ext2_xattr_delete_inode(struct inode *inode)
{
}

static inline void ext2_xattr_destroy_cache(struct mb_cache *cache)
{
}

#define ext2_xattr_handlers …
#define ext2_listxattr …

# endif  /* CONFIG_EXT2_FS_XATTR */

#ifdef CONFIG_EXT2_FS_SECURITY
extern int ext2_init_security(struct inode *inode, struct inode *dir,
			      const struct qstr *qstr);
#else
static inline int ext2_init_security(struct inode *inode, struct inode *dir,
				     const struct qstr *qstr)
{
	return 0;
}
#endif