1#include <linux/reiserfs_xattr.h>
2#include <linux/init.h>
3#include <linux/list.h>
4#include <linux/rwsem.h>
5
6struct inode;
7struct dentry;
8struct iattr;
9struct super_block;
10
11int reiserfs_xattr_register_handlers(void) __init;
12void reiserfs_xattr_unregister_handlers(void);
13int reiserfs_xattr_init(struct super_block *sb, int mount_flags);
14int reiserfs_lookup_privroot(struct super_block *sb);
15int reiserfs_delete_xattrs(struct inode *inode);
16int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs);
17int reiserfs_permission(struct inode *inode, int mask);
18
19#ifdef CONFIG_REISERFS_FS_XATTR
20#define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir)
21ssize_t reiserfs_getxattr(struct dentry *dentry, const char *name,
22			  void *buffer, size_t size);
23int reiserfs_setxattr(struct dentry *dentry, const char *name,
24		      const void *value, size_t size, int flags);
25ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
26int reiserfs_removexattr(struct dentry *dentry, const char *name);
27
28int reiserfs_xattr_get(struct inode *, const char *, void *, size_t);
29int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int);
30int reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *,
31			      struct inode *, const char *, const void *,
32			      size_t, int);
33
34extern const struct xattr_handler reiserfs_xattr_user_handler;
35extern const struct xattr_handler reiserfs_xattr_trusted_handler;
36extern const struct xattr_handler reiserfs_xattr_security_handler;
37#ifdef CONFIG_REISERFS_FS_SECURITY
38int reiserfs_security_init(struct inode *dir, struct inode *inode,
39			   const struct qstr *qstr,
40			   struct reiserfs_security_handle *sec);
41int reiserfs_security_write(struct reiserfs_transaction_handle *th,
42			    struct inode *inode,
43			    struct reiserfs_security_handle *sec);
44void reiserfs_security_free(struct reiserfs_security_handle *sec);
45#endif
46
47static inline int reiserfs_xattrs_initialized(struct super_block *sb)
48{
49	return REISERFS_SB(sb)->priv_root != NULL;
50}
51
52#define xattr_size(size) ((size) + sizeof(struct reiserfs_xattr_header))
53static inline loff_t reiserfs_xattr_nblocks(struct inode *inode, loff_t size)
54{
55	loff_t ret = 0;
56	if (reiserfs_file_data_log(inode)) {
57		ret = _ROUND_UP(xattr_size(size), inode->i_sb->s_blocksize);
58		ret >>= inode->i_sb->s_blocksize_bits;
59	}
60	return ret;
61}
62
63/*
64 * We may have to create up to 3 objects: xattr root, xattr dir, xattr file.
65 * Let's try to be smart about it.
66 * xattr root: We cache it. If it's not cached, we may need to create it.
67 * xattr dir: If anything has been loaded for this inode, we can set a flag
68 *            saying so.
69 * xattr file: Since we don't cache xattrs, we can't tell. We always include
70 *             blocks for it.
71 *
72 * However, since root and dir can be created between calls - YOU MUST SAVE
73 * THIS VALUE.
74 */
75static inline size_t reiserfs_xattr_jcreate_nblocks(struct inode *inode)
76{
77	size_t nblocks = JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
78
79	if ((REISERFS_I(inode)->i_flags & i_has_xattr_dir) == 0) {
80		nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
81		if (d_really_is_negative(REISERFS_SB(inode->i_sb)->xattr_root))
82			nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
83	}
84
85	return nblocks;
86}
87
88static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
89{
90	init_rwsem(&REISERFS_I(inode)->i_xattr_sem);
91}
92
93#else
94
95#define reiserfs_getxattr NULL
96#define reiserfs_setxattr NULL
97#define reiserfs_listxattr NULL
98#define reiserfs_removexattr NULL
99
100static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
101{
102}
103#endif  /*  CONFIG_REISERFS_FS_XATTR  */
104
105#ifndef CONFIG_REISERFS_FS_SECURITY
106static inline int reiserfs_security_init(struct inode *dir,
107					 struct inode *inode,
108					 const struct qstr *qstr,
109					 struct reiserfs_security_handle *sec)
110{
111	return 0;
112}
113static inline int
114reiserfs_security_write(struct reiserfs_transaction_handle *th,
115			struct inode *inode,
116			struct reiserfs_security_handle *sec)
117{
118	return 0;
119}
120static inline void reiserfs_security_free(struct reiserfs_security_handle *sec)
121{}
122#endif
123