Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | File: linux/reiserfs_xattr.h |
| 3 | */ |
| 4 | |
Adrian Bunk | 521dae1 | 2007-02-10 01:46:24 -0800 | [diff] [blame] | 5 | #ifndef _LINUX_REISERFS_XATTR_H |
| 6 | #define _LINUX_REISERFS_XATTR_H |
| 7 | |
| 8 | #include <linux/types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | |
| 10 | /* Magic value in header */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 11 | #define REISERFS_XATTR_MAGIC 0x52465841 /* "RFXA" */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | |
| 13 | struct reiserfs_xattr_header { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 14 | __le32 h_magic; /* magic number for identification */ |
| 15 | __le32 h_hash; /* hash of the value */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | }; |
| 17 | |
Jeff Mahoney | 57fe60d | 2009-03-30 14:02:41 -0400 | [diff] [blame] | 18 | struct reiserfs_security_handle { |
| 19 | char *name; |
| 20 | void *value; |
| 21 | size_t length; |
| 22 | }; |
| 23 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #ifdef __KERNEL__ |
Adrian Bunk | 521dae1 | 2007-02-10 01:46:24 -0800 | [diff] [blame] | 25 | |
David Woodhouse | 98ca79d | 2006-04-25 14:52:51 +0100 | [diff] [blame] | 26 | #include <linux/init.h> |
Adrian Bunk | 521dae1 | 2007-02-10 01:46:24 -0800 | [diff] [blame] | 27 | #include <linux/list.h> |
| 28 | #include <linux/rwsem.h> |
| 29 | #include <linux/reiserfs_fs_i.h> |
| 30 | #include <linux/reiserfs_fs.h> |
| 31 | |
| 32 | struct inode; |
| 33 | struct dentry; |
| 34 | struct iattr; |
| 35 | struct super_block; |
| 36 | struct nameidata; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 38 | int reiserfs_xattr_register_handlers(void) __init; |
| 39 | void reiserfs_xattr_unregister_handlers(void); |
| 40 | int reiserfs_xattr_init(struct super_block *sb, int mount_flags); |
Al Viro | edcc37a | 2009-05-03 06:00:05 -0400 | [diff] [blame] | 41 | int reiserfs_lookup_privroot(struct super_block *sb); |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 42 | int reiserfs_delete_xattrs(struct inode *inode); |
| 43 | int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs); |
Nick Piggin | b74c79e | 2011-01-07 17:49:58 +1100 | [diff] [blame] | 44 | int reiserfs_permission(struct inode *inode, int mask, unsigned int flags); |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 45 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #ifdef CONFIG_REISERFS_FS_XATTR |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | #define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 48 | ssize_t reiserfs_getxattr(struct dentry *dentry, const char *name, |
| 49 | void *buffer, size_t size); |
| 50 | int reiserfs_setxattr(struct dentry *dentry, const char *name, |
| 51 | const void *value, size_t size, int flags); |
| 52 | ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size); |
| 53 | int reiserfs_removexattr(struct dentry *dentry, const char *name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 55 | int reiserfs_xattr_get(struct inode *, const char *, void *, size_t); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 56 | int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int); |
Jeff Mahoney | 0ab2621 | 2009-03-30 14:02:39 -0400 | [diff] [blame] | 57 | int reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *, |
| 58 | struct inode *, const char *, const void *, |
| 59 | size_t, int); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
Stephen Hemminger | 94d09a9 | 2010-05-13 17:53:19 -0700 | [diff] [blame] | 61 | extern const struct xattr_handler reiserfs_xattr_user_handler; |
| 62 | extern const struct xattr_handler reiserfs_xattr_trusted_handler; |
| 63 | extern const struct xattr_handler reiserfs_xattr_security_handler; |
Jeff Mahoney | 57fe60d | 2009-03-30 14:02:41 -0400 | [diff] [blame] | 64 | #ifdef CONFIG_REISERFS_FS_SECURITY |
| 65 | int reiserfs_security_init(struct inode *dir, struct inode *inode, |
Eric Paris | 2a7dba3 | 2011-02-01 11:05:39 -0500 | [diff] [blame^] | 66 | const struct qstr *qstr, |
Jeff Mahoney | 57fe60d | 2009-03-30 14:02:41 -0400 | [diff] [blame] | 67 | struct reiserfs_security_handle *sec); |
| 68 | int reiserfs_security_write(struct reiserfs_transaction_handle *th, |
| 69 | struct inode *inode, |
| 70 | struct reiserfs_security_handle *sec); |
| 71 | void reiserfs_security_free(struct reiserfs_security_handle *sec); |
| 72 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
Jeff Mahoney | 6cb4aff | 2010-03-23 13:35:38 -0700 | [diff] [blame] | 74 | static inline int reiserfs_xattrs_initialized(struct super_block *sb) |
| 75 | { |
| 76 | return REISERFS_SB(sb)->priv_root != NULL; |
| 77 | } |
| 78 | |
Jeff Mahoney | 0ab2621 | 2009-03-30 14:02:39 -0400 | [diff] [blame] | 79 | #define xattr_size(size) ((size) + sizeof(struct reiserfs_xattr_header)) |
| 80 | static inline loff_t reiserfs_xattr_nblocks(struct inode *inode, loff_t size) |
| 81 | { |
| 82 | loff_t ret = 0; |
| 83 | if (reiserfs_file_data_log(inode)) { |
| 84 | ret = _ROUND_UP(xattr_size(size), inode->i_sb->s_blocksize); |
| 85 | ret >>= inode->i_sb->s_blocksize_bits; |
| 86 | } |
| 87 | return ret; |
| 88 | } |
| 89 | |
| 90 | /* We may have to create up to 3 objects: xattr root, xattr dir, xattr file. |
| 91 | * Let's try to be smart about it. |
| 92 | * xattr root: We cache it. If it's not cached, we may need to create it. |
| 93 | * xattr dir: If anything has been loaded for this inode, we can set a flag |
| 94 | * saying so. |
| 95 | * xattr file: Since we don't cache xattrs, we can't tell. We always include |
| 96 | * blocks for it. |
| 97 | * |
| 98 | * However, since root and dir can be created between calls - YOU MUST SAVE |
| 99 | * THIS VALUE. |
| 100 | */ |
| 101 | static inline size_t reiserfs_xattr_jcreate_nblocks(struct inode *inode) |
| 102 | { |
| 103 | size_t nblocks = JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb); |
| 104 | |
| 105 | if ((REISERFS_I(inode)->i_flags & i_has_xattr_dir) == 0) { |
| 106 | nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb); |
Jeff Mahoney | ab17c4f | 2009-05-05 15:30:15 -0400 | [diff] [blame] | 107 | if (!REISERFS_SB(inode->i_sb)->xattr_root->d_inode) |
Jeff Mahoney | 0ab2621 | 2009-03-30 14:02:39 -0400 | [diff] [blame] | 108 | nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb); |
| 109 | } |
| 110 | |
| 111 | return nblocks; |
| 112 | } |
| 113 | |
Alexey Dobriyan | 068fbb3 | 2006-09-29 01:59:58 -0700 | [diff] [blame] | 114 | static inline void reiserfs_init_xattr_rwsem(struct inode *inode) |
| 115 | { |
Jeff Mahoney | d984561 | 2009-03-30 14:02:35 -0400 | [diff] [blame] | 116 | init_rwsem(&REISERFS_I(inode)->i_xattr_sem); |
Alexey Dobriyan | 068fbb3 | 2006-09-29 01:59:58 -0700 | [diff] [blame] | 117 | } |
| 118 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | #else |
| 120 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | #define reiserfs_getxattr NULL |
| 122 | #define reiserfs_setxattr NULL |
| 123 | #define reiserfs_listxattr NULL |
| 124 | #define reiserfs_removexattr NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
Alexey Dobriyan | 068fbb3 | 2006-09-29 01:59:58 -0700 | [diff] [blame] | 126 | static inline void reiserfs_init_xattr_rwsem(struct inode *inode) |
| 127 | { |
| 128 | } |
Adrian Bunk | 521dae1 | 2007-02-10 01:46:24 -0800 | [diff] [blame] | 129 | #endif /* CONFIG_REISERFS_FS_XATTR */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | |
Jeff Mahoney | 57fe60d | 2009-03-30 14:02:41 -0400 | [diff] [blame] | 131 | #ifndef CONFIG_REISERFS_FS_SECURITY |
| 132 | static inline int reiserfs_security_init(struct inode *dir, |
| 133 | struct inode *inode, |
Eric Paris | 2a7dba3 | 2011-02-01 11:05:39 -0500 | [diff] [blame^] | 134 | const struct qstr *qstr, |
Jeff Mahoney | 57fe60d | 2009-03-30 14:02:41 -0400 | [diff] [blame] | 135 | struct reiserfs_security_handle *sec) |
| 136 | { |
| 137 | return 0; |
| 138 | } |
| 139 | static inline int |
| 140 | reiserfs_security_write(struct reiserfs_transaction_handle *th, |
| 141 | struct inode *inode, |
| 142 | struct reiserfs_security_handle *sec) |
| 143 | { |
| 144 | return 0; |
| 145 | } |
| 146 | static inline void reiserfs_security_free(struct reiserfs_security_handle *sec) |
| 147 | {} |
| 148 | #endif |
| 149 | |
Adrian Bunk | 521dae1 | 2007-02-10 01:46:24 -0800 | [diff] [blame] | 150 | #endif /* __KERNEL__ */ |
| 151 | |
| 152 | #endif /* _LINUX_REISERFS_XATTR_H */ |