[GitHub/MotorolaMobilityLLC/kernel-slsi.git] / fs / reiserfs / xattr.h

/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/reiserfs_xattr.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/rwsem.h>
#include <linux/xattr.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_listxattr(struct dentry *dentry, char *buffer, size_t size);

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_listxattr 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
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
c45ac888 AV	2	#include <linux/reiserfs_xattr.h>
	3	#include <linux/init.h>
	4	#include <linux/list.h>
	5	#include <linux/rwsem.h>
79a628d1	6	#include <linux/xattr.h>
c45ac888 AV	7
	8	struct inode;
	9	struct dentry;
	10	struct iattr;
	11	struct super_block;
c45ac888 AV	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 inode *inode, int mask);
	20
	21	#ifdef CONFIG_REISERFS_FS_XATTR
	22	#define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir)
c45ac888	23	ssize_t reiserfs_listxattr(struct dentry dentry, char buffer, size_t size);
c45ac888 AV	24
	25	int reiserfs_xattr_get(struct inode , const char , void *, size_t);
	26	int reiserfs_xattr_set(struct inode , const char , const void *, size_t, int);
	27	int reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *,
	28	struct inode , const char , const void *,
	29	size_t, int);
	30
	31	extern const struct xattr_handler reiserfs_xattr_user_handler;
	32	extern const struct xattr_handler reiserfs_xattr_trusted_handler;
	33	extern const struct xattr_handler reiserfs_xattr_security_handler;
	34	#ifdef CONFIG_REISERFS_FS_SECURITY
	35	int reiserfs_security_init(struct inode dir, struct inode inode,
	36	const struct qstr *qstr,
	37	struct reiserfs_security_handle *sec);
	38	int reiserfs_security_write(struct reiserfs_transaction_handle *th,
	39	struct inode *inode,
	40	struct reiserfs_security_handle *sec);
	41	void reiserfs_security_free(struct reiserfs_security_handle *sec);
	42	#endif
	43
	44	static inline int reiserfs_xattrs_initialized(struct super_block *sb)
	45	{
	46	return REISERFS_SB(sb)->priv_root != NULL;
	47	}
	48
	49	#define xattr_size(size) ((size) + sizeof(struct reiserfs_xattr_header))
	50	static inline loff_t reiserfs_xattr_nblocks(struct inode *inode, loff_t size)
	51	{
	52	loff_t ret = 0;
	53	if (reiserfs_file_data_log(inode)) {
	54	ret = _ROUND_UP(xattr_size(size), inode->i_sb->s_blocksize);
	55	ret >>= inode->i_sb->s_blocksize_bits;
	56	}
	57	return ret;
	58	}
	59
098297b2 JM	60	/*
098297b2 JM	61	* We may have to create up to 3 objects: xattr root, xattr dir, xattr file.
c45ac888 AV	62	* Let's try to be smart about it.
	63	* xattr root: We cache it. If it's not cached, we may need to create it.
	64	* xattr dir: If anything has been loaded for this inode, we can set a flag
	65	* saying so.
	66	* xattr file: Since we don't cache xattrs, we can't tell. We always include
	67	* blocks for it.
	68	*
	69	* However, since root and dir can be created between calls - YOU MUST SAVE
	70	* THIS VALUE.
	71	*/
	72	static inline size_t reiserfs_xattr_jcreate_nblocks(struct inode *inode)
	73	{
	74	size_t nblocks = JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
	75
	76	if ((REISERFS_I(inode)->i_flags & i_has_xattr_dir) == 0) {
	77	nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
2b0143b5	78	if (d_really_is_negative(REISERFS_SB(inode->i_sb)->xattr_root))
c45ac888 AV	79	nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
	80	}
	81
	82	return nblocks;
	83	}
	84
	85	static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
	86	{
	87	init_rwsem(&REISERFS_I(inode)->i_xattr_sem);
	88	}
	89
	90	#else
	91
c45ac888	92	#define reiserfs_listxattr NULL
c45ac888 AV	93
	94	static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
	95	{
	96	}
	97	#endif /* CONFIG_REISERFS_FS_XATTR */
	98
	99	#ifndef CONFIG_REISERFS_FS_SECURITY
	100	static inline int reiserfs_security_init(struct inode *dir,
	101	struct inode *inode,
	102	const struct qstr *qstr,
	103	struct reiserfs_security_handle *sec)
	104	{
	105	return 0;
	106	}
	107	static inline int
	108	reiserfs_security_write(struct reiserfs_transaction_handle *th,
	109	struct inode *inode,
	110	struct reiserfs_security_handle *sec)
	111	{
	112	return 0;
	113	}
	114	static inline void reiserfs_security_free(struct reiserfs_security_handle *sec)
	115	{}
	116	#endif