[deliverable/linux.git] / fs / reiserfs / xattr.h

#include <linux/reiserfs_xattr.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/rwsem.h>

struct inode;
struct dentry;
struct iattr;
struct super_block;

int reiserfs_xattr_register_handlers(void) __init;
void reiserfs_xattr_unregister_handlers(void);
int reiserfs_xattr_init(struct super_block *sb, int mount_flags);
int reiserfs_lookup_privroot(struct super_block *sb);
int reiserfs_delete_xattrs(struct inode *inode);
int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs);
int reiserfs_permission(struct inode *inode, int mask);

#ifdef CONFIG_REISERFS_FS_XATTR
#define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir)
ssize_t reiserfs_getxattr(struct dentry *dentry, const char *name,
			  void *buffer, size_t size);
int reiserfs_setxattr(struct dentry *dentry, const char *name,
		      const void *value, size_t size, int flags);
ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
int reiserfs_removexattr(struct dentry *dentry, const char *name);

int reiserfs_xattr_get(struct inode *, const char *, void *, size_t);
int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int);
int reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *,
			      struct inode *, const char *, const void *,
			      size_t, int);

extern const struct xattr_handler reiserfs_xattr_user_handler;
extern const struct xattr_handler reiserfs_xattr_trusted_handler;
extern const struct xattr_handler reiserfs_xattr_security_handler;
#ifdef CONFIG_REISERFS_FS_SECURITY
int reiserfs_security_init(struct inode *dir, struct inode *inode,
			   const struct qstr *qstr,
			   struct reiserfs_security_handle *sec);
int reiserfs_security_write(struct reiserfs_transaction_handle *th,
			    struct inode *inode,
			    struct reiserfs_security_handle *sec);
void reiserfs_security_free(struct reiserfs_security_handle *sec);
#endif

static inline int reiserfs_xattrs_initialized(struct super_block *sb)
{
	return REISERFS_SB(sb)->priv_root != NULL;
}

#define xattr_size(size) ((size) + sizeof(struct reiserfs_xattr_header))
static inline loff_t reiserfs_xattr_nblocks(struct inode *inode, loff_t size)
{
	loff_t ret = 0;
	if (reiserfs_file_data_log(inode)) {
		ret = _ROUND_UP(xattr_size(size), inode->i_sb->s_blocksize);
		ret >>= inode->i_sb->s_blocksize_bits;
	}
	return ret;
}

/*
 * We may have to create up to 3 objects: xattr root, xattr dir, xattr file.
 * Let's try to be smart about it.
 * xattr root: We cache it. If it's not cached, we may need to create it.
 * xattr dir: If anything has been loaded for this inode, we can set a flag
 *            saying so.
 * xattr file: Since we don't cache xattrs, we can't tell. We always include
 *             blocks for it.
 *
 * However, since root and dir can be created between calls - YOU MUST SAVE
 * THIS VALUE.
 */
static inline size_t reiserfs_xattr_jcreate_nblocks(struct inode *inode)
{
	size_t nblocks = JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);

	if ((REISERFS_I(inode)->i_flags & i_has_xattr_dir) == 0) {
		nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
		if (d_really_is_negative(REISERFS_SB(inode->i_sb)->xattr_root))
			nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
	}

	return nblocks;
}

static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
{
	init_rwsem(&REISERFS_I(inode)->i_xattr_sem);
}

#else

#define reiserfs_getxattr NULL
#define reiserfs_setxattr NULL
#define reiserfs_listxattr NULL
#define reiserfs_removexattr NULL

static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
{
}
#endif  /*  CONFIG_REISERFS_FS_XATTR  */

#ifndef CONFIG_REISERFS_FS_SECURITY
static inline int reiserfs_security_init(struct inode *dir,
					 struct inode *inode,
					 const struct qstr *qstr,
					 struct reiserfs_security_handle *sec)
{
	return 0;
}
static inline int
reiserfs_security_write(struct reiserfs_transaction_handle *th,
			struct inode *inode,
			struct reiserfs_security_handle *sec)
{
	return 0;
}
static inline void reiserfs_security_free(struct reiserfs_security_handle *sec)
{}
#endif
Commit	Line	Data
c45ac888 AV	1	#include <linux/reiserfs_xattr.h>
	2	#include <linux/init.h>
	3	#include <linux/list.h>
	4	#include <linux/rwsem.h>
c45ac888 AV	5
	6	struct inode;
	7	struct dentry;
	8	struct iattr;
	9	struct super_block;
c45ac888 AV	10
	11	int reiserfs_xattr_register_handlers(void) __init;
	12	void reiserfs_xattr_unregister_handlers(void);
	13	int reiserfs_xattr_init(struct super_block *sb, int mount_flags);
	14	int reiserfs_lookup_privroot(struct super_block *sb);
	15	int reiserfs_delete_xattrs(struct inode *inode);
	16	int reiserfs_chown_xattrs(struct inode inode, struct iattr attrs);
	17	int 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)
	21	ssize_t reiserfs_getxattr(struct dentry dentry, const char name,
	22	void *buffer, size_t size);
	23	int reiserfs_setxattr(struct dentry dentry, const char name,
	24	const void *value, size_t size, int flags);
	25	ssize_t reiserfs_listxattr(struct dentry dentry, char buffer, size_t size);
	26	int reiserfs_removexattr(struct dentry dentry, const char name);
	27
	28	int reiserfs_xattr_get(struct inode , const char , void *, size_t);
	29	int reiserfs_xattr_set(struct inode , const char , const void *, size_t, int);
	30	int reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *,
	31	struct inode , const char , const void *,
	32	size_t, int);
	33
	34	extern const struct xattr_handler reiserfs_xattr_user_handler;
	35	extern const struct xattr_handler reiserfs_xattr_trusted_handler;
	36	extern const struct xattr_handler reiserfs_xattr_security_handler;
	37	#ifdef CONFIG_REISERFS_FS_SECURITY
	38	int reiserfs_security_init(struct inode dir, struct inode inode,
	39	const struct qstr *qstr,
	40	struct reiserfs_security_handle *sec);
	41	int reiserfs_security_write(struct reiserfs_transaction_handle *th,
	42	struct inode *inode,
	43	struct reiserfs_security_handle *sec);
	44	void reiserfs_security_free(struct reiserfs_security_handle *sec);
	45	#endif
	46
	47	static 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))
	53	static 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
098297b2 JM	63	/*
098297b2 JM	64	* We may have to create up to 3 objects: xattr root, xattr dir, xattr file.
c45ac888 AV	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	*/
	75	static 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);
2b0143b5	81	if (d_really_is_negative(REISERFS_SB(inode->i_sb)->xattr_root))
c45ac888 AV	82	nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
	83	}
	84
	85	return nblocks;
	86	}
	87
	88	static 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
	100	static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
	101	{
	102	}
	103	#endif /* CONFIG_REISERFS_FS_XATTR */
	104
	105	#ifndef CONFIG_REISERFS_FS_SECURITY
	106	static 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	}
	113	static inline int
	114	reiserfs_security_write(struct reiserfs_transaction_handle *th,
	115	struct inode *inode,
	116	struct reiserfs_security_handle *sec)
	117	{
	118	return 0;
	119	}
	120	static inline void reiserfs_security_free(struct reiserfs_security_handle *sec)
	121	{}
	122	#endif