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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 File: linux/reiserfs_xattr.h
3*/
4
Adrian Bunk521dae12007-02-10 01:46:24 -08005#ifndef _LINUX_REISERFS_XATTR_H
6#define _LINUX_REISERFS_XATTR_H
7
8#include <linux/types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07009
10/* Magic value in header */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070011#define REISERFS_XATTR_MAGIC 0x52465841 /* "RFXA" */
Linus Torvalds1da177e2005-04-16 15:20:36 -070012
13struct reiserfs_xattr_header {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070014 __le32 h_magic; /* magic number for identification */
15 __le32 h_hash; /* hash of the value */
Linus Torvalds1da177e2005-04-16 15:20:36 -070016};
17
18#ifdef __KERNEL__
Adrian Bunk521dae12007-02-10 01:46:24 -080019
David Woodhouse98ca79d2006-04-25 14:52:51 +010020#include <linux/init.h>
Adrian Bunk521dae12007-02-10 01:46:24 -080021#include <linux/list.h>
22#include <linux/rwsem.h>
23#include <linux/reiserfs_fs_i.h>
24#include <linux/reiserfs_fs.h>
25
26struct inode;
27struct dentry;
28struct iattr;
29struct super_block;
30struct nameidata;
Linus Torvalds1da177e2005-04-16 15:20:36 -070031
32struct reiserfs_xattr_handler {
33 char *prefix;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070034 int (*init) (void);
35 void (*exit) (void);
36 int (*get) (struct inode * inode, const char *name, void *buffer,
37 size_t size);
38 int (*set) (struct inode * inode, const char *name, const void *buffer,
39 size_t size, int flags);
40 int (*del) (struct inode * inode, const char *name);
41 int (*list) (struct inode * inode, const char *name, int namelen,
42 char *out);
43 struct list_head handlers;
Linus Torvalds1da177e2005-04-16 15:20:36 -070044};
45
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#ifdef CONFIG_REISERFS_FS_XATTR
47#define is_reiserfs_priv_object(inode) IS_PRIVATE(inode)
48#define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070049ssize_t reiserfs_getxattr(struct dentry *dentry, const char *name,
50 void *buffer, size_t size);
51int reiserfs_setxattr(struct dentry *dentry, const char *name,
52 const void *value, size_t size, int flags);
53ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
54int reiserfs_removexattr(struct dentry *dentry, const char *name);
55int reiserfs_delete_xattrs(struct inode *inode);
56int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs);
57int reiserfs_xattr_init(struct super_block *sb, int mount_flags);
58int reiserfs_permission(struct inode *inode, int mask, struct nameidata *nd);
Linus Torvalds1da177e2005-04-16 15:20:36 -070059
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070060int reiserfs_xattr_del(struct inode *, const char *);
61int reiserfs_xattr_get(const struct inode *, const char *, void *, size_t);
62int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
64extern struct reiserfs_xattr_handler user_handler;
65extern struct reiserfs_xattr_handler trusted_handler;
Linus Torvalds1da177e2005-04-16 15:20:36 -070066extern struct reiserfs_xattr_handler security_handler;
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070068int reiserfs_xattr_register_handlers(void) __init;
69void reiserfs_xattr_unregister_handlers(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070071static inline void reiserfs_write_lock_xattrs(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -070072{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070073 down_write(&REISERFS_XATTR_DIR_SEM(sb));
Linus Torvalds1da177e2005-04-16 15:20:36 -070074}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070075static inline void reiserfs_write_unlock_xattrs(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -070076{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070077 up_write(&REISERFS_XATTR_DIR_SEM(sb));
Linus Torvalds1da177e2005-04-16 15:20:36 -070078}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070079static inline void reiserfs_read_lock_xattrs(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -070080{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070081 down_read(&REISERFS_XATTR_DIR_SEM(sb));
Linus Torvalds1da177e2005-04-16 15:20:36 -070082}
83
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070084static inline void reiserfs_read_unlock_xattrs(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -070085{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070086 up_read(&REISERFS_XATTR_DIR_SEM(sb));
Linus Torvalds1da177e2005-04-16 15:20:36 -070087}
88
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070089static inline void reiserfs_write_lock_xattr_i(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -070090{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070091 down_write(&REISERFS_I(inode)->xattr_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -070092}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070093static inline void reiserfs_write_unlock_xattr_i(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -070094{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070095 up_write(&REISERFS_I(inode)->xattr_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070097static inline void reiserfs_read_lock_xattr_i(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -070098{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070099 down_read(&REISERFS_I(inode)->xattr_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100}
101
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700102static inline void reiserfs_read_unlock_xattr_i(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700104 up_read(&REISERFS_I(inode)->xattr_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105}
106
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700107static inline void reiserfs_mark_inode_private(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700109 inode->i_flags |= S_PRIVATE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110}
111
Alexey Dobriyan068fbb32006-09-29 01:59:58 -0700112static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
113{
114 init_rwsem(&REISERFS_I(inode)->xattr_sem);
115}
116
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117#else
118
119#define is_reiserfs_priv_object(inode) 0
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800120#define reiserfs_mark_inode_private(inode) do {;} while(0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121#define reiserfs_getxattr NULL
122#define reiserfs_setxattr NULL
123#define reiserfs_listxattr NULL
124#define reiserfs_removexattr NULL
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800125#define reiserfs_write_lock_xattrs(sb) do {;} while(0)
126#define reiserfs_write_unlock_xattrs(sb) do {;} while(0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127#define reiserfs_read_lock_xattrs(sb)
128#define reiserfs_read_unlock_xattrs(sb)
129
130#define reiserfs_permission NULL
131
132#define reiserfs_xattr_register_handlers() 0
133#define reiserfs_xattr_unregister_handlers()
134
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700135static inline int reiserfs_delete_xattrs(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700137 return 0;
138};
139static inline int reiserfs_chown_xattrs(struct inode *inode,
140 struct iattr *attrs)
141{
142 return 0;
143};
144static inline int reiserfs_xattr_init(struct super_block *sb, int mount_flags)
145{
146 sb->s_flags = (sb->s_flags & ~MS_POSIXACL); /* to be sure */
147 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148};
Alexey Dobriyan068fbb32006-09-29 01:59:58 -0700149static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
150{
151}
Adrian Bunk521dae12007-02-10 01:46:24 -0800152#endif /* CONFIG_REISERFS_FS_XATTR */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153
Adrian Bunk521dae12007-02-10 01:46:24 -0800154#endif /* __KERNEL__ */
155
156#endif /* _LINUX_REISERFS_XATTR_H */