1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #include <linux/reiserfs_xattr.h>
3*4882a593Smuzhiyun #include <linux/init.h>
4*4882a593Smuzhiyun #include <linux/list.h>
5*4882a593Smuzhiyun #include <linux/rwsem.h>
6*4882a593Smuzhiyun #include <linux/xattr.h>
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun struct inode;
9*4882a593Smuzhiyun struct dentry;
10*4882a593Smuzhiyun struct iattr;
11*4882a593Smuzhiyun struct super_block;
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun int reiserfs_xattr_register_handlers(void) __init;
14*4882a593Smuzhiyun void reiserfs_xattr_unregister_handlers(void);
15*4882a593Smuzhiyun int reiserfs_xattr_init(struct super_block *sb, int mount_flags);
16*4882a593Smuzhiyun int reiserfs_lookup_privroot(struct super_block *sb);
17*4882a593Smuzhiyun int reiserfs_delete_xattrs(struct inode *inode);
18*4882a593Smuzhiyun int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs);
19*4882a593Smuzhiyun int reiserfs_permission(struct inode *inode, int mask);
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun #ifdef CONFIG_REISERFS_FS_XATTR
22*4882a593Smuzhiyun #define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir)
23*4882a593Smuzhiyun ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun int reiserfs_xattr_get(struct inode *, const char *, void *, size_t);
26*4882a593Smuzhiyun int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int);
27*4882a593Smuzhiyun int reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *,
28*4882a593Smuzhiyun struct inode *, const char *, const void *,
29*4882a593Smuzhiyun size_t, int);
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun extern const struct xattr_handler reiserfs_xattr_user_handler;
32*4882a593Smuzhiyun extern const struct xattr_handler reiserfs_xattr_trusted_handler;
33*4882a593Smuzhiyun extern const struct xattr_handler reiserfs_xattr_security_handler;
34*4882a593Smuzhiyun #ifdef CONFIG_REISERFS_FS_SECURITY
35*4882a593Smuzhiyun int reiserfs_security_init(struct inode *dir, struct inode *inode,
36*4882a593Smuzhiyun const struct qstr *qstr,
37*4882a593Smuzhiyun struct reiserfs_security_handle *sec);
38*4882a593Smuzhiyun int reiserfs_security_write(struct reiserfs_transaction_handle *th,
39*4882a593Smuzhiyun struct inode *inode,
40*4882a593Smuzhiyun struct reiserfs_security_handle *sec);
41*4882a593Smuzhiyun void reiserfs_security_free(struct reiserfs_security_handle *sec);
42*4882a593Smuzhiyun #endif
43*4882a593Smuzhiyun
reiserfs_xattrs_initialized(struct super_block * sb)44*4882a593Smuzhiyun static inline int reiserfs_xattrs_initialized(struct super_block *sb)
45*4882a593Smuzhiyun {
46*4882a593Smuzhiyun return REISERFS_SB(sb)->priv_root && REISERFS_SB(sb)->xattr_root;
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun #define xattr_size(size) ((size) + sizeof(struct reiserfs_xattr_header))
reiserfs_xattr_nblocks(struct inode * inode,loff_t size)50*4882a593Smuzhiyun static inline loff_t reiserfs_xattr_nblocks(struct inode *inode, loff_t size)
51*4882a593Smuzhiyun {
52*4882a593Smuzhiyun loff_t ret = 0;
53*4882a593Smuzhiyun if (reiserfs_file_data_log(inode)) {
54*4882a593Smuzhiyun ret = _ROUND_UP(xattr_size(size), inode->i_sb->s_blocksize);
55*4882a593Smuzhiyun ret >>= inode->i_sb->s_blocksize_bits;
56*4882a593Smuzhiyun }
57*4882a593Smuzhiyun return ret;
58*4882a593Smuzhiyun }
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun /*
61*4882a593Smuzhiyun * We may have to create up to 3 objects: xattr root, xattr dir, xattr file.
62*4882a593Smuzhiyun * Let's try to be smart about it.
63*4882a593Smuzhiyun * xattr root: We cache it. If it's not cached, we may need to create it.
64*4882a593Smuzhiyun * xattr dir: If anything has been loaded for this inode, we can set a flag
65*4882a593Smuzhiyun * saying so.
66*4882a593Smuzhiyun * xattr file: Since we don't cache xattrs, we can't tell. We always include
67*4882a593Smuzhiyun * blocks for it.
68*4882a593Smuzhiyun *
69*4882a593Smuzhiyun * However, since root and dir can be created between calls - YOU MUST SAVE
70*4882a593Smuzhiyun * THIS VALUE.
71*4882a593Smuzhiyun */
reiserfs_xattr_jcreate_nblocks(struct inode * inode)72*4882a593Smuzhiyun static inline size_t reiserfs_xattr_jcreate_nblocks(struct inode *inode)
73*4882a593Smuzhiyun {
74*4882a593Smuzhiyun size_t nblocks = JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun if ((REISERFS_I(inode)->i_flags & i_has_xattr_dir) == 0) {
77*4882a593Smuzhiyun nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
78*4882a593Smuzhiyun if (d_really_is_negative(REISERFS_SB(inode->i_sb)->xattr_root))
79*4882a593Smuzhiyun nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
80*4882a593Smuzhiyun }
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun return nblocks;
83*4882a593Smuzhiyun }
84*4882a593Smuzhiyun
reiserfs_init_xattr_rwsem(struct inode * inode)85*4882a593Smuzhiyun static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
86*4882a593Smuzhiyun {
87*4882a593Smuzhiyun init_rwsem(&REISERFS_I(inode)->i_xattr_sem);
88*4882a593Smuzhiyun }
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun #else
91*4882a593Smuzhiyun
92*4882a593Smuzhiyun #define reiserfs_listxattr NULL
93*4882a593Smuzhiyun
reiserfs_init_xattr_rwsem(struct inode * inode)94*4882a593Smuzhiyun static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
95*4882a593Smuzhiyun {
96*4882a593Smuzhiyun }
97*4882a593Smuzhiyun #endif /* CONFIG_REISERFS_FS_XATTR */
98*4882a593Smuzhiyun
99*4882a593Smuzhiyun #ifndef CONFIG_REISERFS_FS_SECURITY
reiserfs_security_init(struct inode * dir,struct inode * inode,const struct qstr * qstr,struct reiserfs_security_handle * sec)100*4882a593Smuzhiyun static inline int reiserfs_security_init(struct inode *dir,
101*4882a593Smuzhiyun struct inode *inode,
102*4882a593Smuzhiyun const struct qstr *qstr,
103*4882a593Smuzhiyun struct reiserfs_security_handle *sec)
104*4882a593Smuzhiyun {
105*4882a593Smuzhiyun return 0;
106*4882a593Smuzhiyun }
107*4882a593Smuzhiyun static inline int
reiserfs_security_write(struct reiserfs_transaction_handle * th,struct inode * inode,struct reiserfs_security_handle * sec)108*4882a593Smuzhiyun reiserfs_security_write(struct reiserfs_transaction_handle *th,
109*4882a593Smuzhiyun struct inode *inode,
110*4882a593Smuzhiyun struct reiserfs_security_handle *sec)
111*4882a593Smuzhiyun {
112*4882a593Smuzhiyun return 0;
113*4882a593Smuzhiyun }
reiserfs_security_free(struct reiserfs_security_handle * sec)114*4882a593Smuzhiyun static inline void reiserfs_security_free(struct reiserfs_security_handle *sec)
115*4882a593Smuzhiyun {}
116*4882a593Smuzhiyun #endif
117