cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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xattr.h (4198B)

      1/*
      2 * JFFS2 -- Journalling Flash File System, Version 2.
      3 *
      4 * Copyright © 2006  NEC Corporation
      5 *
      6 * Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
      7 *
      8 * For licensing information, see the file 'LICENCE' in this directory.
      9 *
     10 */
     11
     12#ifndef _JFFS2_FS_XATTR_H_
     13#define _JFFS2_FS_XATTR_H_
     14
     15#include <linux/xattr.h>
     16#include <linux/list.h>
     17
     18#define JFFS2_XFLAGS_HOT	(0x01)	/* This datum is HOT */
     19#define JFFS2_XFLAGS_BIND	(0x02)	/* This datum is not reclaimed */
     20#define JFFS2_XFLAGS_DEAD	(0x40)	/* This datum is already dead */
     21#define JFFS2_XFLAGS_INVALID	(0x80)	/* This datum contains crc error */
     22
     23struct jffs2_xattr_datum
     24{
     25	void *always_null;
     26	struct jffs2_raw_node_ref *node;
     27	uint8_t class;
     28	uint8_t flags;
     29	uint16_t xprefix;		/* see JFFS2_XATTR_PREFIX_* */
     30
     31	struct list_head xindex;	/* chained from c->xattrindex[n] */
     32	atomic_t refcnt;		/* # of xattr_ref refers this */
     33	uint32_t xid;
     34	uint32_t version;
     35
     36	uint32_t data_crc;
     37	uint32_t hashkey;
     38	char *xname;		/* XATTR name without prefix */
     39	uint32_t name_len;	/* length of xname */
     40	char *xvalue;		/* XATTR value */
     41	uint32_t value_len;	/* length of xvalue */
     42};
     43
     44struct jffs2_inode_cache;
     45struct jffs2_xattr_ref
     46{
     47	void *always_null;
     48	struct jffs2_raw_node_ref *node;
     49	uint8_t class;
     50	uint8_t flags;		/* Currently unused */
     51	u16 unused;
     52
     53	uint32_t xseqno;
     54	union {
     55		struct jffs2_inode_cache *ic;	/* reference to jffs2_inode_cache */
     56		uint32_t ino;			/* only used in scanning/building  */
     57	};
     58	union {
     59		struct jffs2_xattr_datum *xd;	/* reference to jffs2_xattr_datum */
     60		uint32_t xid;			/* only used in sccanning/building */
     61	};
     62	struct jffs2_xattr_ref *next;		/* chained from ic->xref_list */
     63};
     64
     65#define XREF_DELETE_MARKER	(0x00000001)
     66static inline int is_xattr_ref_dead(struct jffs2_xattr_ref *ref)
     67{
     68	return ((ref->xseqno & XREF_DELETE_MARKER) != 0);
     69}
     70
     71#ifdef CONFIG_JFFS2_FS_XATTR
     72
     73extern void jffs2_init_xattr_subsystem(struct jffs2_sb_info *c);
     74extern void jffs2_build_xattr_subsystem(struct jffs2_sb_info *c);
     75extern void jffs2_clear_xattr_subsystem(struct jffs2_sb_info *c);
     76
     77extern struct jffs2_xattr_datum *jffs2_setup_xattr_datum(struct jffs2_sb_info *c,
     78							 uint32_t xid, uint32_t version);
     79
     80extern void jffs2_xattr_do_crccheck_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
     81extern void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
     82extern void jffs2_xattr_free_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
     83
     84extern int jffs2_garbage_collect_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd,
     85					     struct jffs2_raw_node_ref *raw);
     86extern int jffs2_garbage_collect_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref,
     87					   struct jffs2_raw_node_ref *raw);
     88extern int jffs2_verify_xattr(struct jffs2_sb_info *c);
     89extern void jffs2_release_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd);
     90extern void jffs2_release_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref);
     91
     92extern int do_jffs2_getxattr(struct inode *inode, int xprefix, const char *xname,
     93			     char *buffer, size_t size);
     94extern int do_jffs2_setxattr(struct inode *inode, int xprefix, const char *xname,
     95			     const char *buffer, size_t size, int flags);
     96
     97extern const struct xattr_handler *jffs2_xattr_handlers[];
     98extern const struct xattr_handler jffs2_user_xattr_handler;
     99extern const struct xattr_handler jffs2_trusted_xattr_handler;
    100
    101extern ssize_t jffs2_listxattr(struct dentry *, char *, size_t);
    102
    103#else
    104
    105#define jffs2_init_xattr_subsystem(c)
    106#define jffs2_build_xattr_subsystem(c)
    107#define jffs2_clear_xattr_subsystem(c)
    108
    109#define jffs2_xattr_do_crccheck_inode(c, ic)
    110#define jffs2_xattr_delete_inode(c, ic)
    111#define jffs2_xattr_free_inode(c, ic)
    112#define jffs2_verify_xattr(c)			(1)
    113
    114#define jffs2_xattr_handlers	NULL
    115#define jffs2_listxattr		NULL
    116
    117#endif /* CONFIG_JFFS2_FS_XATTR */
    118
    119#ifdef CONFIG_JFFS2_FS_SECURITY
    120extern int jffs2_init_security(struct inode *inode, struct inode *dir,
    121			       const struct qstr *qstr);
    122extern const struct xattr_handler jffs2_security_xattr_handler;
    123#else
    124#define jffs2_init_security(inode,dir,qstr)	(0)
    125#endif /* CONFIG_JFFS2_FS_SECURITY */
    126
    127#endif /* _JFFS2_FS_XATTR_H_ */