39 static s64 logfs_get_free_bytes(struct logfs_area *area, size_t bytes)  in logfs_get_free_bytes()  argument
43 	logfs_open_area(area, bytes);  in logfs_get_free_bytes()
45 	ofs = area->a_used_bytes;  in logfs_get_free_bytes()
46 	area->a_used_bytes += bytes;  in logfs_get_free_bytes()
47 	BUG_ON(area->a_used_bytes >= logfs_super(area->a_sb)->s_segsize);  in logfs_get_free_bytes()
49 	return dev_ofs(area->a_sb, area->a_segno, ofs);  in logfs_get_free_bytes()
71 int __logfs_buf_write(struct logfs_area *area, u64 ofs, void *buf, size_t len,  in __logfs_buf_write()  argument
84 		page = get_mapping_page(area->a_sb, index, use_filler);  in __logfs_buf_write()
105 static void pad_partial_page(struct logfs_area *area)  in pad_partial_page()  argument
107 	struct super_block *sb = area->a_sb;  in pad_partial_page()
109 	u64 ofs = dev_ofs(sb, area->a_segno, area->a_used_bytes);  in pad_partial_page()
126 static void pad_full_pages(struct logfs_area *area)  in pad_full_pages()  argument
128 	struct super_block *sb = area->a_sb;  in pad_full_pages()
130 	u64 ofs = dev_ofs(sb, area->a_segno, area->a_used_bytes);  in pad_full_pages()
131 	u32 len = super->s_segsize - area->a_used_bytes;  in pad_full_pages()
155 static void pad_wbuf(struct logfs_area *area, int final)  in pad_wbuf()  argument
157 	pad_partial_page(area);  in pad_wbuf()
159 		pad_full_pages(area);  in pad_wbuf()
296 	struct logfs_area *area;  in __logfs_segment_write()  local
307 	area = get_area(sb, shadow->gc_level);  in __logfs_segment_write()
308 	ofs = logfs_get_free_bytes(area, len + LOGFS_OBJECT_HEADERSIZE);  in __logfs_segment_write()
326 	logfs_buf_write(area, ofs, &h, sizeof(h));  in __logfs_segment_write()
327 	logfs_buf_write(area, ofs + LOGFS_OBJECT_HEADERSIZE, buf, len);  in __logfs_segment_write()
732 int logfs_open_area(struct logfs_area *area, size_t bytes)  in logfs_open_area()  argument
734 	struct super_block *sb = area->a_sb;  in logfs_open_area()
738 	if (area->a_is_open && area->a_used_bytes + bytes <= super->s_segsize)  in logfs_open_area()
741 	if (area->a_is_open) {  in logfs_open_area()
742 		u64 ofs = dev_ofs(sb, area->a_segno, area->a_written_bytes);  in logfs_open_area()
743 		u32 len = super->s_segsize - area->a_written_bytes;  in logfs_open_area()
745 		log_gc("logfs_close_area(%x)\n", area->a_segno);  in logfs_open_area()
746 		pad_wbuf(area, 1);  in logfs_open_area()
747 		super->s_devops->writeseg(area->a_sb, ofs, len);  in logfs_open_area()
748 		freeseg(sb, area->a_segno);  in logfs_open_area()
752 	area->a_used_bytes = 0;  in logfs_open_area()
753 	area->a_written_bytes = 0;  in logfs_open_area()
755 	area->a_ops->get_free_segment(area);  in logfs_open_area()
756 	area->a_ops->get_erase_count(area);  in logfs_open_area()
758 	log_gc("logfs_open_area(%x, %x)\n", area->a_segno, area->a_level);  in logfs_open_area()
759 	err = area->a_ops->erase_segment(area);  in logfs_open_area()
762 				area->a_segno);  in logfs_open_area()
763 		logfs_mark_segment_bad(sb, area->a_segno);  in logfs_open_area()
766 	area->a_is_open = 1;  in logfs_open_area()
770 void logfs_sync_area(struct logfs_area *area)  in logfs_sync_area()  argument
772 	struct super_block *sb = area->a_sb;  in logfs_sync_area()
774 	u64 ofs = dev_ofs(sb, area->a_segno, area->a_written_bytes);  in logfs_sync_area()
775 	u32 len = (area->a_used_bytes - area->a_written_bytes);  in logfs_sync_area()
781 	pad_wbuf(area, 0);  in logfs_sync_area()
783 	area->a_written_bytes += len;  in logfs_sync_area()
799 static void ostore_get_free_segment(struct logfs_area *area)  in ostore_get_free_segment()  argument
801 	struct super_block *sb = area->a_sb;  in ostore_get_free_segment()
809 	area->a_segno = get_best_cand(sb, &super->s_free_list, NULL);  in ostore_get_free_segment()
812 static void ostore_get_erase_count(struct logfs_area *area)  in ostore_get_erase_count()  argument
817 	logfs_get_segment_entry(area->a_sb, area->a_segno, &se);  in ostore_get_erase_count()
822 	area->a_erase_count = (ec_level >> 4) + 1;  in ostore_get_erase_count()
825 static int ostore_erase_segment(struct logfs_area *area)  in ostore_erase_segment()  argument
827 	struct super_block *sb = area->a_sb;  in ostore_erase_segment()
832 	err = logfs_erase_segment(sb, area->a_segno, 0);  in ostore_erase_segment()
838 	sh.level = (__force u8)area->a_level;  in ostore_erase_segment()
839 	sh.segno = cpu_to_be32(area->a_segno);  in ostore_erase_segment()
840 	sh.ec = cpu_to_be32(area->a_erase_count);  in ostore_erase_segment()
844 	logfs_set_segment_erased(sb, area->a_segno, area->a_erase_count,  in ostore_erase_segment()
845 			area->a_level);  in ostore_erase_segment()
847 	ofs = dev_ofs(sb, area->a_segno, 0);  in ostore_erase_segment()
848 	area->a_used_bytes = sizeof(sh);  in ostore_erase_segment()
849 	logfs_buf_write(area, ofs, &sh, sizeof(sh));  in ostore_erase_segment()
859 static void free_area(struct logfs_area *area)  in free_area()  argument
861 	if (area)  in free_area()
862 		freeseg(area->a_sb, area->a_segno);  in free_area()
863 	kfree(area);  in free_area()
878 	struct logfs_area *area;  in alloc_area()  local
880 	area = kzalloc(sizeof(*area), GFP_KERNEL);  in alloc_area()
881 	if (!area)  in alloc_area()
884 	area->a_sb = sb;  in alloc_area()
885 	return area;  in alloc_area()