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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
8struct inode;
9struct dentry;
10struct iattr;
11struct super_block;
12
13int reiserfs_xattr_register_handlers(void) __init;
14void reiserfs_xattr_unregister_handlers(void);
15int reiserfs_xattr_init(struct super_block *sb, int mount_flags);
16int reiserfs_lookup_privroot(struct super_block *sb);
17int reiserfs_delete_xattrs(struct inode *inode);
18int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs);
19int reiserfs_permission(struct user_namespace *mnt_userns,
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)
24ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
25
26int reiserfs_xattr_get(struct inode *, const char *, void *, size_t);
27int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int);
28int reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *,
29 struct inode *, const char *, const void *,
30 size_t, int);
31
32extern const struct xattr_handler reiserfs_xattr_user_handler;
33extern const struct xattr_handler reiserfs_xattr_trusted_handler;
34extern const struct xattr_handler reiserfs_xattr_security_handler;
35#ifdef CONFIG_REISERFS_FS_SECURITY
36int reiserfs_security_init(struct inode *dir, struct inode *inode,
37 const struct qstr *qstr,
38 struct reiserfs_security_handle *sec);
39int reiserfs_security_write(struct reiserfs_transaction_handle *th,
40 struct inode *inode,
41 struct reiserfs_security_handle *sec);
42void reiserfs_security_free(struct reiserfs_security_handle *sec);
43#endif
44
45static 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))
51static 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 */
73static 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(REISERFS_SB(inode->i_sb)->xattr_root))
80 nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
81 }
82
83 return nblocks;
84}
85
86static 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
95static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
96{
97}
98#endif /* CONFIG_REISERFS_FS_XATTR */
99
100#ifndef CONFIG_REISERFS_FS_SECURITY
101static 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}
108static inline int
109reiserfs_security_write(struct reiserfs_transaction_handle *th,
110 struct inode *inode,
111 struct reiserfs_security_handle *sec)
112{
113 return 0;
114}
115static inline void reiserfs_security_free(struct reiserfs_security_handle *sec)
116{}
117#endif
1#include <linux/reiserfs_xattr.h>
2#include <linux/init.h>
3#include <linux/list.h>
4#include <linux/rwsem.h>
5
6struct inode;
7struct dentry;
8struct iattr;
9struct super_block;
10
11int reiserfs_xattr_register_handlers(void) __init;
12void reiserfs_xattr_unregister_handlers(void);
13int reiserfs_xattr_init(struct super_block *sb, int mount_flags);
14int reiserfs_lookup_privroot(struct super_block *sb);
15int reiserfs_delete_xattrs(struct inode *inode);
16int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs);
17int 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)
21ssize_t reiserfs_getxattr(struct dentry *dentry, const char *name,
22 void *buffer, size_t size);
23int reiserfs_setxattr(struct dentry *dentry, const char *name,
24 const void *value, size_t size, int flags);
25ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
26int reiserfs_removexattr(struct dentry *dentry, const char *name);
27
28int reiserfs_xattr_get(struct inode *, const char *, void *, size_t);
29int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int);
30int reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *,
31 struct inode *, const char *, const void *,
32 size_t, int);
33
34extern const struct xattr_handler reiserfs_xattr_user_handler;
35extern const struct xattr_handler reiserfs_xattr_trusted_handler;
36extern const struct xattr_handler reiserfs_xattr_security_handler;
37#ifdef CONFIG_REISERFS_FS_SECURITY
38int reiserfs_security_init(struct inode *dir, struct inode *inode,
39 const struct qstr *qstr,
40 struct reiserfs_security_handle *sec);
41int reiserfs_security_write(struct reiserfs_transaction_handle *th,
42 struct inode *inode,
43 struct reiserfs_security_handle *sec);
44void reiserfs_security_free(struct reiserfs_security_handle *sec);
45#endif
46
47static 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))
53static 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
63/*
64 * We may have to create up to 3 objects: xattr root, xattr dir, xattr file.
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 */
75static 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);
81 if (d_really_is_negative(REISERFS_SB(inode->i_sb)->xattr_root))
82 nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
83 }
84
85 return nblocks;
86}
87
88static 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
100static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
101{
102}
103#endif /* CONFIG_REISERFS_FS_XATTR */
104
105#ifndef CONFIG_REISERFS_FS_SECURITY
106static 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}
113static inline int
114reiserfs_security_write(struct reiserfs_transaction_handle *th,
115 struct inode *inode,
116 struct reiserfs_security_handle *sec)
117{
118 return 0;
119}
120static inline void reiserfs_security_free(struct reiserfs_security_handle *sec)
121{}
122#endif