1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #include <linux/reiserfs_xattr.h> |
3 | #include <linux/init.h> |
4 | #include <linux/list.h> |
5 | #include <linux/rwsem.h> |
6 | #include <linux/xattr.h> |
7 | |
8 | struct inode; |
9 | struct dentry; |
10 | struct iattr; |
11 | struct super_block; |
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 mnt_idmap *idmap, |
20 | struct inode *inode, int mask); |
21 | |
22 | #ifdef CONFIG_REISERFS_FS_XATTR |
23 | #define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir) |
24 | ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size); |
25 | |
26 | int reiserfs_xattr_get(struct inode *, const char *, void *, size_t); |
27 | int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int); |
28 | int reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *, |
29 | struct inode *, const char *, const void *, |
30 | size_t, int); |
31 | |
32 | extern const struct xattr_handler reiserfs_xattr_user_handler; |
33 | extern const struct xattr_handler reiserfs_xattr_trusted_handler; |
34 | extern const struct xattr_handler reiserfs_xattr_security_handler; |
35 | #ifdef CONFIG_REISERFS_FS_SECURITY |
36 | int reiserfs_security_init(struct inode *dir, struct inode *inode, |
37 | const struct qstr *qstr, |
38 | struct reiserfs_security_handle *sec); |
39 | int reiserfs_security_write(struct reiserfs_transaction_handle *th, |
40 | struct inode *inode, |
41 | struct reiserfs_security_handle *sec); |
42 | void reiserfs_security_free(struct reiserfs_security_handle *sec); |
43 | #endif |
44 | |
45 | static inline int reiserfs_xattrs_initialized(struct super_block *sb) |
46 | { |
47 | return REISERFS_SB(sb)->priv_root && REISERFS_SB(sb)->xattr_root; |
48 | } |
49 | |
50 | #define xattr_size(size) ((size) + sizeof(struct reiserfs_xattr_header)) |
51 | static inline loff_t reiserfs_xattr_nblocks(struct inode *inode, loff_t size) |
52 | { |
53 | loff_t ret = 0; |
54 | if (reiserfs_file_data_log(inode)) { |
55 | ret = _ROUND_UP(xattr_size(size), inode->i_sb->s_blocksize); |
56 | ret >>= inode->i_sb->s_blocksize_bits; |
57 | } |
58 | return ret; |
59 | } |
60 | |
61 | /* |
62 | * We may have to create up to 3 objects: xattr root, xattr dir, xattr file. |
63 | * Let's try to be smart about it. |
64 | * xattr root: We cache it. If it's not cached, we may need to create it. |
65 | * xattr dir: If anything has been loaded for this inode, we can set a flag |
66 | * saying so. |
67 | * xattr file: Since we don't cache xattrs, we can't tell. We always include |
68 | * blocks for it. |
69 | * |
70 | * However, since root and dir can be created between calls - YOU MUST SAVE |
71 | * THIS VALUE. |
72 | */ |
73 | static inline size_t reiserfs_xattr_jcreate_nblocks(struct inode *inode) |
74 | { |
75 | size_t nblocks = JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb); |
76 | |
77 | if ((REISERFS_I(inode)->i_flags & i_has_xattr_dir) == 0) { |
78 | nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb); |
79 | if (d_really_is_negative(dentry: REISERFS_SB(sb: inode->i_sb)->xattr_root)) |
80 | nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb); |
81 | } |
82 | |
83 | return nblocks; |
84 | } |
85 | |
86 | static inline void reiserfs_init_xattr_rwsem(struct inode *inode) |
87 | { |
88 | init_rwsem(&REISERFS_I(inode)->i_xattr_sem); |
89 | } |
90 | |
91 | #else |
92 | |
93 | #define reiserfs_listxattr NULL |
94 | |
95 | static inline void reiserfs_init_xattr_rwsem(struct inode *inode) |
96 | { |
97 | } |
98 | #endif /* CONFIG_REISERFS_FS_XATTR */ |
99 | |
100 | #ifndef CONFIG_REISERFS_FS_SECURITY |
101 | static inline int reiserfs_security_init(struct inode *dir, |
102 | struct inode *inode, |
103 | const struct qstr *qstr, |
104 | struct reiserfs_security_handle *sec) |
105 | { |
106 | return 0; |
107 | } |
108 | static inline int |
109 | reiserfs_security_write(struct reiserfs_transaction_handle *th, |
110 | struct inode *inode, |
111 | struct reiserfs_security_handle *sec) |
112 | { |
113 | return 0; |
114 | } |
115 | static inline void reiserfs_security_free(struct reiserfs_security_handle *sec) |
116 | {} |
117 | #endif |
118 | |