Revision 5baaf3b9efe127d239038de9219d381f4d882b26 authored by Lee Jones on 28 June 2016, 08:24:40 UTC, committed by Lee Jones on 01 July 2016, 09:52:16 UTC
We're making all reset line users specify whether their lines are
shared with other IP or they operate them exclusively.  In this case
the line is exclusively used only by this IP, so use the *_exclusive()
API accordingly.

Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
1 parent f5f3583
Raw File
xattr.h
/*
  File: linux/ext2_xattr.h

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

  (C) 2001 Andreas Gruenbacher, <a.gruenbacher@computer.org>
*/

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

/* Magic value in attribute blocks */
#define EXT2_XATTR_MAGIC		0xEA020000

/* Maximum number of references to one attribute block */
#define EXT2_XATTR_REFCOUNT_MAX		1024

/* Name indexes */
#define EXT2_XATTR_INDEX_USER			1
#define EXT2_XATTR_INDEX_POSIX_ACL_ACCESS	2
#define EXT2_XATTR_INDEX_POSIX_ACL_DEFAULT	3
#define EXT2_XATTR_INDEX_TRUSTED		4
#define	EXT2_XATTR_INDEX_LUSTRE			5
#define EXT2_XATTR_INDEX_SECURITY	        6

struct ext2_xattr_header {
	__le32	h_magic;	/* magic number for identification */
	__le32	h_refcount;	/* reference count */
	__le32	h_blocks;	/* number of disk blocks used */
	__le32	h_hash;		/* hash value of all attributes */
	__u32	h_reserved[4];	/* zero right now */
};

struct ext2_xattr_entry {
	__u8	e_name_len;	/* length of name */
	__u8	e_name_index;	/* attribute name index */
	__le16	e_value_offs;	/* offset in disk block of value */
	__le32	e_value_block;	/* disk block attribute is stored on (n/i) */
	__le32	e_value_size;	/* size of attribute value */
	__le32	e_hash;		/* hash value of name and value */
	char	e_name[0];	/* attribute name */
};

#define EXT2_XATTR_PAD_BITS		2
#define EXT2_XATTR_PAD		(1<<EXT2_XATTR_PAD_BITS)
#define EXT2_XATTR_ROUND		(EXT2_XATTR_PAD-1)
#define EXT2_XATTR_LEN(name_len) \
	(((name_len) + EXT2_XATTR_ROUND + \
	sizeof(struct ext2_xattr_entry)) & ~EXT2_XATTR_ROUND)
#define EXT2_XATTR_NEXT(entry) \
	( (struct ext2_xattr_entry *)( \
	  (char *)(entry) + EXT2_XATTR_LEN((entry)->e_name_len)) )
#define EXT2_XATTR_SIZE(size) \
	(((size) + EXT2_XATTR_ROUND) & ~EXT2_XATTR_ROUND)

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 *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 NULL

# 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
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