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c45ac888 AV |
1 | #include <linux/reiserfs_xattr.h> |
2 | #include <linux/init.h> | |
3 | #include <linux/list.h> | |
4 | #include <linux/rwsem.h> | |
79a628d1 | 5 | #include <linux/xattr.h> |
c45ac888 AV |
6 | |
7 | struct inode; | |
8 | struct dentry; | |
9 | struct iattr; | |
10 | struct super_block; | |
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11 | |
12 | int reiserfs_xattr_register_handlers(void) __init; | |
13 | void reiserfs_xattr_unregister_handlers(void); | |
14 | int reiserfs_xattr_init(struct super_block *sb, int mount_flags); | |
15 | int reiserfs_lookup_privroot(struct super_block *sb); | |
16 | int reiserfs_delete_xattrs(struct inode *inode); | |
17 | int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs); | |
18 | int reiserfs_permission(struct inode *inode, int mask); | |
19 | ||
20 | #ifdef CONFIG_REISERFS_FS_XATTR | |
21 | #define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir) | |
c45ac888 | 22 | ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size); |
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23 | |
24 | int reiserfs_xattr_get(struct inode *, const char *, void *, size_t); | |
25 | int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int); | |
26 | int reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *, | |
27 | struct inode *, const char *, const void *, | |
28 | size_t, int); | |
29 | ||
30 | extern const struct xattr_handler reiserfs_xattr_user_handler; | |
31 | extern const struct xattr_handler reiserfs_xattr_trusted_handler; | |
32 | extern const struct xattr_handler reiserfs_xattr_security_handler; | |
33 | #ifdef CONFIG_REISERFS_FS_SECURITY | |
34 | int reiserfs_security_init(struct inode *dir, struct inode *inode, | |
35 | const struct qstr *qstr, | |
36 | struct reiserfs_security_handle *sec); | |
37 | int reiserfs_security_write(struct reiserfs_transaction_handle *th, | |
38 | struct inode *inode, | |
39 | struct reiserfs_security_handle *sec); | |
40 | void reiserfs_security_free(struct reiserfs_security_handle *sec); | |
41 | #endif | |
42 | ||
43 | static inline int reiserfs_xattrs_initialized(struct super_block *sb) | |
44 | { | |
45 | return REISERFS_SB(sb)->priv_root != NULL; | |
46 | } | |
47 | ||
48 | #define xattr_size(size) ((size) + sizeof(struct reiserfs_xattr_header)) | |
49 | static inline loff_t reiserfs_xattr_nblocks(struct inode *inode, loff_t size) | |
50 | { | |
51 | loff_t ret = 0; | |
52 | if (reiserfs_file_data_log(inode)) { | |
53 | ret = _ROUND_UP(xattr_size(size), inode->i_sb->s_blocksize); | |
54 | ret >>= inode->i_sb->s_blocksize_bits; | |
55 | } | |
56 | return ret; | |
57 | } | |
58 | ||
098297b2 JM |
59 | /* |
60 | * We may have to create up to 3 objects: xattr root, xattr dir, xattr file. | |
c45ac888 AV |
61 | * Let's try to be smart about it. |
62 | * xattr root: We cache it. If it's not cached, we may need to create it. | |
63 | * xattr dir: If anything has been loaded for this inode, we can set a flag | |
64 | * saying so. | |
65 | * xattr file: Since we don't cache xattrs, we can't tell. We always include | |
66 | * blocks for it. | |
67 | * | |
68 | * However, since root and dir can be created between calls - YOU MUST SAVE | |
69 | * THIS VALUE. | |
70 | */ | |
71 | static inline size_t reiserfs_xattr_jcreate_nblocks(struct inode *inode) | |
72 | { | |
73 | size_t nblocks = JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb); | |
74 | ||
75 | if ((REISERFS_I(inode)->i_flags & i_has_xattr_dir) == 0) { | |
76 | nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb); | |
2b0143b5 | 77 | if (d_really_is_negative(REISERFS_SB(inode->i_sb)->xattr_root)) |
c45ac888 AV |
78 | nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb); |
79 | } | |
80 | ||
81 | return nblocks; | |
82 | } | |
83 | ||
84 | static inline void reiserfs_init_xattr_rwsem(struct inode *inode) | |
85 | { | |
86 | init_rwsem(&REISERFS_I(inode)->i_xattr_sem); | |
87 | } | |
88 | ||
89 | #else | |
90 | ||
c45ac888 | 91 | #define reiserfs_listxattr NULL |
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92 | |
93 | static inline void reiserfs_init_xattr_rwsem(struct inode *inode) | |
94 | { | |
95 | } | |
96 | #endif /* CONFIG_REISERFS_FS_XATTR */ | |
97 | ||
98 | #ifndef CONFIG_REISERFS_FS_SECURITY | |
99 | static inline int reiserfs_security_init(struct inode *dir, | |
100 | struct inode *inode, | |
101 | const struct qstr *qstr, | |
102 | struct reiserfs_security_handle *sec) | |
103 | { | |
104 | return 0; | |
105 | } | |
106 | static inline int | |
107 | reiserfs_security_write(struct reiserfs_transaction_handle *th, | |
108 | struct inode *inode, | |
109 | struct reiserfs_security_handle *sec) | |
110 | { | |
111 | return 0; | |
112 | } | |
113 | static inline void reiserfs_security_free(struct reiserfs_security_handle *sec) | |
114 | {} | |
115 | #endif |