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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> | |
c45ac888 AV |
5 | |
6 | struct inode; | |
7 | struct dentry; | |
8 | struct iattr; | |
9 | struct super_block; | |
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10 | |
11 | int reiserfs_xattr_register_handlers(void) __init; | |
12 | void reiserfs_xattr_unregister_handlers(void); | |
13 | int reiserfs_xattr_init(struct super_block *sb, int mount_flags); | |
14 | int reiserfs_lookup_privroot(struct super_block *sb); | |
15 | int reiserfs_delete_xattrs(struct inode *inode); | |
16 | int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs); | |
17 | int 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) | |
21 | ssize_t reiserfs_getxattr(struct dentry *dentry, const char *name, | |
22 | void *buffer, size_t size); | |
23 | int reiserfs_setxattr(struct dentry *dentry, const char *name, | |
24 | const void *value, size_t size, int flags); | |
25 | ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size); | |
26 | int reiserfs_removexattr(struct dentry *dentry, const char *name); | |
27 | ||
28 | int reiserfs_xattr_get(struct inode *, const char *, void *, size_t); | |
29 | int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int); | |
30 | int reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *, | |
31 | struct inode *, const char *, const void *, | |
32 | size_t, int); | |
33 | ||
34 | extern const struct xattr_handler reiserfs_xattr_user_handler; | |
35 | extern const struct xattr_handler reiserfs_xattr_trusted_handler; | |
36 | extern const struct xattr_handler reiserfs_xattr_security_handler; | |
37 | #ifdef CONFIG_REISERFS_FS_SECURITY | |
38 | int reiserfs_security_init(struct inode *dir, struct inode *inode, | |
39 | const struct qstr *qstr, | |
40 | struct reiserfs_security_handle *sec); | |
41 | int reiserfs_security_write(struct reiserfs_transaction_handle *th, | |
42 | struct inode *inode, | |
43 | struct reiserfs_security_handle *sec); | |
44 | void reiserfs_security_free(struct reiserfs_security_handle *sec); | |
45 | #endif | |
46 | ||
47 | static 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)) | |
53 | static 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 | ||
098297b2 JM |
63 | /* |
64 | * We may have to create up to 3 objects: xattr root, xattr dir, xattr file. | |
c45ac888 AV |
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 | */ | |
75 | static 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); | |
2b0143b5 | 81 | if (d_really_is_negative(REISERFS_SB(inode->i_sb)->xattr_root)) |
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82 | nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb); |
83 | } | |
84 | ||
85 | return nblocks; | |
86 | } | |
87 | ||
88 | static 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 | ||
100 | static inline void reiserfs_init_xattr_rwsem(struct inode *inode) | |
101 | { | |
102 | } | |
103 | #endif /* CONFIG_REISERFS_FS_XATTR */ | |
104 | ||
105 | #ifndef CONFIG_REISERFS_FS_SECURITY | |
106 | static 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 | } | |
113 | static inline int | |
114 | reiserfs_security_write(struct reiserfs_transaction_handle *th, | |
115 | struct inode *inode, | |
116 | struct reiserfs_security_handle *sec) | |
117 | { | |
118 | return 0; | |
119 | } | |
120 | static inline void reiserfs_security_free(struct reiserfs_security_handle *sec) | |
121 | {} | |
122 | #endif |