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17#ifndef __F2FS_XATTR_H__
18#define __F2FS_XATTR_H__
19
20#include <linux/init.h>
21#include <linux/xattr.h>
22
23
24#define F2FS_XATTR_MAGIC 0xF2F52011
25
26
27#define F2FS_XATTR_REFCOUNT_MAX 1024
28
29
30#define F2FS_SYSTEM_ADVISE_PREFIX "system.advise"
31#define F2FS_XATTR_INDEX_USER 1
32#define F2FS_XATTR_INDEX_POSIX_ACL_ACCESS 2
33#define F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT 3
34#define F2FS_XATTR_INDEX_TRUSTED 4
35#define F2FS_XATTR_INDEX_LUSTRE 5
36#define F2FS_XATTR_INDEX_SECURITY 6
37#define F2FS_XATTR_INDEX_ADVISE 7
38
39struct f2fs_xattr_header {
40 __le32 h_magic;
41 __le32 h_refcount;
42 __u32 h_reserved[4];
43};
44
45struct f2fs_xattr_entry {
46 __u8 e_name_index;
47 __u8 e_name_len;
48 __le16 e_value_size;
49 char e_name[0];
50};
51
52#define XATTR_HDR(ptr) ((struct f2fs_xattr_header *)(ptr))
53#define XATTR_ENTRY(ptr) ((struct f2fs_xattr_entry *)(ptr))
54#define XATTR_FIRST_ENTRY(ptr) (XATTR_ENTRY(XATTR_HDR(ptr) + 1))
55#define XATTR_ROUND (3)
56
57#define XATTR_ALIGN(size) ((size + XATTR_ROUND) & ~XATTR_ROUND)
58
59#define ENTRY_SIZE(entry) (XATTR_ALIGN(sizeof(struct f2fs_xattr_entry) + \
60 entry->e_name_len + le16_to_cpu(entry->e_value_size)))
61
62#define XATTR_NEXT_ENTRY(entry) ((struct f2fs_xattr_entry *)((char *)(entry) +\
63 ENTRY_SIZE(entry)))
64
65#define IS_XATTR_LAST_ENTRY(entry) (*(__u32 *)(entry) == 0)
66
67#define list_for_each_xattr(entry, addr) \
68 for (entry = XATTR_FIRST_ENTRY(addr);\
69 !IS_XATTR_LAST_ENTRY(entry);\
70 entry = XATTR_NEXT_ENTRY(entry))
71
72#define MIN_OFFSET(i) XATTR_ALIGN(inline_xattr_size(i) + PAGE_SIZE - \
73 sizeof(struct node_footer) - sizeof(__u32))
74
75#define MAX_VALUE_LEN(i) (MIN_OFFSET(i) - \
76 sizeof(struct f2fs_xattr_header) - \
77 sizeof(struct f2fs_xattr_entry))
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108#ifdef CONFIG_F2FS_FS_XATTR
109extern const struct xattr_handler f2fs_xattr_user_handler;
110extern const struct xattr_handler f2fs_xattr_trusted_handler;
111extern const struct xattr_handler f2fs_xattr_advise_handler;
112extern const struct xattr_handler f2fs_xattr_security_handler;
113
114extern const struct xattr_handler *f2fs_xattr_handlers[];
115
116extern int f2fs_setxattr(struct inode *, int, const char *,
117 const void *, size_t, struct page *, int);
118extern int f2fs_getxattr(struct inode *, int, const char *, void *, size_t);
119extern ssize_t f2fs_listxattr(struct dentry *, char *, size_t);
120#else
121
122#define f2fs_xattr_handlers NULL
123static inline int f2fs_setxattr(struct inode *inode, int index,
124 const char *name, const void *value, size_t size, int flags)
125{
126 return -EOPNOTSUPP;
127}
128static inline int f2fs_getxattr(struct inode *inode, int index,
129 const char *name, void *buffer, size_t buffer_size)
130{
131 return -EOPNOTSUPP;
132}
133static inline ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer,
134 size_t buffer_size)
135{
136 return -EOPNOTSUPP;
137}
138#endif
139
140#ifdef CONFIG_F2FS_FS_SECURITY
141extern int f2fs_init_security(struct inode *, struct inode *,
142 const struct qstr *, struct page *);
143#else
144static inline int f2fs_init_security(struct inode *inode, struct inode *dir,
145 const struct qstr *qstr, struct page *ipage)
146{
147 return 0;
148}
149#endif
150#endif
151