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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
c45ac888 AV |
2 | #include <linux/reiserfs_xattr.h> |
3 | #include <linux/init.h> | |
4 | #include <linux/list.h> | |
5 | #include <linux/rwsem.h> | |
79a628d1 | 6 | #include <linux/xattr.h> |
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7 | |
8 | struct inode; | |
9 | struct dentry; | |
10 | struct iattr; | |
11 | struct super_block; | |
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12 | |
13 | int reiserfs_xattr_register_handlers(void) __init; | |
14 | void reiserfs_xattr_unregister_handlers(void); | |
15 | int reiserfs_xattr_init(struct super_block *sb, int mount_flags); | |
16 | int reiserfs_lookup_privroot(struct super_block *sb); | |
17 | int reiserfs_delete_xattrs(struct inode *inode); | |
18 | int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs); | |
19 | int reiserfs_permission(struct inode *inode, int mask); | |
20 | ||
21 | #ifdef CONFIG_REISERFS_FS_XATTR | |
22 | #define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir) | |
c45ac888 | 23 | ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size); |
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24 | |
25 | int reiserfs_xattr_get(struct inode *, const char *, void *, size_t); | |
26 | int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int); | |
27 | int reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *, | |
28 | struct inode *, const char *, const void *, | |
29 | size_t, int); | |
30 | ||
31 | extern const struct xattr_handler reiserfs_xattr_user_handler; | |
32 | extern const struct xattr_handler reiserfs_xattr_trusted_handler; | |
33 | extern const struct xattr_handler reiserfs_xattr_security_handler; | |
34 | #ifdef CONFIG_REISERFS_FS_SECURITY | |
35 | int reiserfs_security_init(struct inode *dir, struct inode *inode, | |
36 | const struct qstr *qstr, | |
37 | struct reiserfs_security_handle *sec); | |
38 | int reiserfs_security_write(struct reiserfs_transaction_handle *th, | |
39 | struct inode *inode, | |
40 | struct reiserfs_security_handle *sec); | |
41 | void reiserfs_security_free(struct reiserfs_security_handle *sec); | |
42 | #endif | |
43 | ||
44 | static inline int reiserfs_xattrs_initialized(struct super_block *sb) | |
45 | { | |
46 | return REISERFS_SB(sb)->priv_root != NULL; | |
47 | } | |
48 | ||
49 | #define xattr_size(size) ((size) + sizeof(struct reiserfs_xattr_header)) | |
50 | static inline loff_t reiserfs_xattr_nblocks(struct inode *inode, loff_t size) | |
51 | { | |
52 | loff_t ret = 0; | |
53 | if (reiserfs_file_data_log(inode)) { | |
54 | ret = _ROUND_UP(xattr_size(size), inode->i_sb->s_blocksize); | |
55 | ret >>= inode->i_sb->s_blocksize_bits; | |
56 | } | |
57 | return ret; | |
58 | } | |
59 | ||
098297b2 JM |
60 | /* |
61 | * We may have to create up to 3 objects: xattr root, xattr dir, xattr file. | |
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62 | * Let's try to be smart about it. |
63 | * xattr root: We cache it. If it's not cached, we may need to create it. | |
64 | * xattr dir: If anything has been loaded for this inode, we can set a flag | |
65 | * saying so. | |
66 | * xattr file: Since we don't cache xattrs, we can't tell. We always include | |
67 | * blocks for it. | |
68 | * | |
69 | * However, since root and dir can be created between calls - YOU MUST SAVE | |
70 | * THIS VALUE. | |
71 | */ | |
72 | static inline size_t reiserfs_xattr_jcreate_nblocks(struct inode *inode) | |
73 | { | |
74 | size_t nblocks = JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb); | |
75 | ||
76 | if ((REISERFS_I(inode)->i_flags & i_has_xattr_dir) == 0) { | |
77 | nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb); | |
2b0143b5 | 78 | if (d_really_is_negative(REISERFS_SB(inode->i_sb)->xattr_root)) |
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79 | nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb); |
80 | } | |
81 | ||
82 | return nblocks; | |
83 | } | |
84 | ||
85 | static inline void reiserfs_init_xattr_rwsem(struct inode *inode) | |
86 | { | |
87 | init_rwsem(&REISERFS_I(inode)->i_xattr_sem); | |
88 | } | |
89 | ||
90 | #else | |
91 | ||
c45ac888 | 92 | #define reiserfs_listxattr NULL |
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93 | |
94 | static inline void reiserfs_init_xattr_rwsem(struct inode *inode) | |
95 | { | |
96 | } | |
97 | #endif /* CONFIG_REISERFS_FS_XATTR */ | |
98 | ||
99 | #ifndef CONFIG_REISERFS_FS_SECURITY | |
100 | static inline int reiserfs_security_init(struct inode *dir, | |
101 | struct inode *inode, | |
102 | const struct qstr *qstr, | |
103 | struct reiserfs_security_handle *sec) | |
104 | { | |
105 | return 0; | |
106 | } | |
107 | static inline int | |
108 | reiserfs_security_write(struct reiserfs_transaction_handle *th, | |
109 | struct inode *inode, | |
110 | struct reiserfs_security_handle *sec) | |
111 | { | |
112 | return 0; | |
113 | } | |
114 | static inline void reiserfs_security_free(struct reiserfs_security_handle *sec) | |
115 | {} | |
116 | #endif |