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14#ifndef __F2FS_XATTR_H__
15#define __F2FS_XATTR_H__
16
17#include <linux/init.h>
18#include <linux/xattr.h>
19
20
21#define F2FS_XATTR_MAGIC 0xF2F52011
22
23
24#define F2FS_XATTR_REFCOUNT_MAX 1024
25
26
27#define F2FS_SYSTEM_ADVISE_NAME "system.advise"
28#define F2FS_XATTR_INDEX_USER 1
29#define F2FS_XATTR_INDEX_POSIX_ACL_ACCESS 2
30#define F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT 3
31#define F2FS_XATTR_INDEX_TRUSTED 4
32#define F2FS_XATTR_INDEX_LUSTRE 5
33#define F2FS_XATTR_INDEX_SECURITY 6
34#define F2FS_XATTR_INDEX_ADVISE 7
35
36#define F2FS_XATTR_INDEX_ENCRYPTION 9
37#define F2FS_XATTR_INDEX_VERITY 11
38
39#define F2FS_XATTR_NAME_ENCRYPTION_CONTEXT "c"
40#define F2FS_XATTR_NAME_VERITY "v"
41
42struct f2fs_xattr_header {
43 __le32 h_magic;
44 __le32 h_refcount;
45 __u32 h_reserved[4];
46};
47
48struct f2fs_xattr_entry {
49 __u8 e_name_index;
50 __u8 e_name_len;
51 __le16 e_value_size;
52 char e_name[0];
53};
54
55#define XATTR_HDR(ptr) ((struct f2fs_xattr_header *)(ptr))
56#define XATTR_ENTRY(ptr) ((struct f2fs_xattr_entry *)(ptr))
57#define XATTR_FIRST_ENTRY(ptr) (XATTR_ENTRY(XATTR_HDR(ptr) + 1))
58#define XATTR_ROUND (3)
59
60#define XATTR_ALIGN(size) (((size) + XATTR_ROUND) & ~XATTR_ROUND)
61
62#define ENTRY_SIZE(entry) (XATTR_ALIGN(sizeof(struct f2fs_xattr_entry) + \
63 (entry)->e_name_len + le16_to_cpu((entry)->e_value_size)))
64
65#define XATTR_NEXT_ENTRY(entry) ((struct f2fs_xattr_entry *)((char *)(entry) +\
66 ENTRY_SIZE(entry)))
67
68#define IS_XATTR_LAST_ENTRY(entry) (*(__u32 *)(entry) == 0)
69
70#define list_for_each_xattr(entry, addr) \
71 for (entry = XATTR_FIRST_ENTRY(addr);\
72 !IS_XATTR_LAST_ENTRY(entry);\
73 entry = XATTR_NEXT_ENTRY(entry))
74#define VALID_XATTR_BLOCK_SIZE (PAGE_SIZE - sizeof(struct node_footer))
75#define XATTR_PADDING_SIZE (sizeof(__u32))
76#define XATTR_SIZE(x,i) (((x) ? VALID_XATTR_BLOCK_SIZE : 0) + \
77 (inline_xattr_size(i)))
78#define MIN_OFFSET(i) XATTR_ALIGN(inline_xattr_size(i) + \
79 VALID_XATTR_BLOCK_SIZE)
80
81#define MAX_VALUE_LEN(i) (MIN_OFFSET(i) - \
82 sizeof(struct f2fs_xattr_header) - \
83 sizeof(struct f2fs_xattr_entry))
84
85#define MAX_INLINE_XATTR_SIZE \
86 (DEF_ADDRS_PER_INODE - \
87 F2FS_TOTAL_EXTRA_ATTR_SIZE / sizeof(__le32) - \
88 DEF_INLINE_RESERVED_SIZE - \
89 MIN_INLINE_DENTRY_SIZE / sizeof(__le32))
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120#ifdef CONFIG_F2FS_FS_XATTR
121extern const struct xattr_handler f2fs_xattr_user_handler;
122extern const struct xattr_handler f2fs_xattr_trusted_handler;
123extern const struct xattr_handler f2fs_xattr_advise_handler;
124extern const struct xattr_handler f2fs_xattr_security_handler;
125
126extern const struct xattr_handler *f2fs_xattr_handlers[];
127
128extern int f2fs_setxattr(struct inode *, int, const char *,
129 const void *, size_t, struct page *, int);
130extern int f2fs_getxattr(struct inode *, int, const char *, void *,
131 size_t, struct page *);
132extern ssize_t f2fs_listxattr(struct dentry *, char *, size_t);
133#else
134
135#define f2fs_xattr_handlers NULL
136static inline int f2fs_setxattr(struct inode *inode, int index,
137 const char *name, const void *value, size_t size,
138 struct page *page, int flags)
139{
140 return -EOPNOTSUPP;
141}
142static inline int f2fs_getxattr(struct inode *inode, int index,
143 const char *name, void *buffer,
144 size_t buffer_size, struct page *dpage)
145{
146 return -EOPNOTSUPP;
147}
148static inline ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer,
149 size_t buffer_size)
150{
151 return -EOPNOTSUPP;
152}
153#endif
154
155#ifdef CONFIG_F2FS_FS_SECURITY
156extern int f2fs_init_security(struct inode *, struct inode *,
157 const struct qstr *, struct page *);
158#else
159static inline int f2fs_init_security(struct inode *inode, struct inode *dir,
160 const struct qstr *qstr, struct page *ipage)
161{
162 return 0;
163}
164#endif
165#endif
166
