fs/btrfs/accessors.c

27 void btrfs_init_map_token(struct btrfs_map_token *token, struct extent_buffer *eb)  in btrfs_init_map_token()  argument
29 	token->eb = eb;  in btrfs_init_map_token()
30 	token->kaddr = page_address(eb->pages[0]);  in btrfs_init_map_token()
31 	token->offset = 0;  in btrfs_init_map_token()
59 u##bits btrfs_get_token_##bits(struct btrfs_map_token *token,		\
64 	const unsigned long oip = get_eb_offset_in_page(token->eb,	\
70 	ASSERT(token);							\
71 	ASSERT(token->kaddr);						\
72 	ASSERT(check_setget_bounds(token->eb, ptr, off, size));		\
73 	if (token->offset <= member_offset &&				\
74 	    member_offset + size <= token->offset + PAGE_SIZE) {	\
75 		return get_unaligned_le##bits(token->kaddr + oip);	\
77 	token->kaddr = page_address(token->eb->pages[idx]);		\
78 	token->offset = idx << PAGE_SHIFT;				\
80 		return get_unaligned_le##bits(token->kaddr + oip);	\
82 	memcpy(lebytes, token->kaddr + oip, part);			\
83 	token->kaddr = page_address(token->eb->pages[idx + 1]);		\
84 	token->offset = (idx + 1) << PAGE_SHIFT;			\
85 	memcpy(lebytes + part, token->kaddr, size - part);		\
108 void btrfs_set_token_##bits(struct btrfs_map_token *token,		\
114 	const unsigned long oip = get_eb_offset_in_page(token->eb,	\
120 	ASSERT(token);							\
121 	ASSERT(token->kaddr);						\
122 	ASSERT(check_setget_bounds(token->eb, ptr, off, size));		\
123 	if (token->offset <= member_offset &&				\
124 	    member_offset + size <= token->offset + PAGE_SIZE) {	\
125 		put_unaligned_le##bits(val, token->kaddr + oip);	\
128 	token->kaddr = page_address(token->eb->pages[idx]);		\
129 	token->offset = idx << PAGE_SHIFT;				\
131 		put_unaligned_le##bits(val, token->kaddr + oip);	\
135 	memcpy(token->kaddr + oip, lebytes, part);			\
136 	token->kaddr = page_address(token->eb->pages[idx + 1]);		\
137 	token->offset = (idx + 1) << PAGE_SHIFT;			\
138 	memcpy(token->kaddr, lebytes + part, size - part);		\