54 static void dump_segfile(struct super_block *sb)  in dump_segfile()  argument
56 	struct logfs_super *super = logfs_super(sb);  in dump_segfile()
61 		logfs_get_segment_entry(sb, segno, &se);  in dump_segfile()
65 			logfs_get_segment_entry(sb, segno, &se);  in dump_segfile()
70 			logfs_get_segment_entry(sb, segno, &se);  in dump_segfile()
75 			logfs_get_segment_entry(sb, segno, &se);  in dump_segfile()
89 void logfs_crash_dump(struct super_block *sb)  in logfs_crash_dump()  argument
91 	dump_segfile(sb);  in logfs_crash_dump()
99 	struct super_block *sb = dentry->d_sb;  in logfs_statfs()  local
100 	struct logfs_super *super = logfs_super(sb);  in logfs_statfs()
103 	stats->f_bsize		= sb->s_blocksize;  in logfs_statfs()
105 	stats->f_bfree		= super->s_free_bytes >> sb->s_blocksize_bits;  in logfs_statfs()
106 	stats->f_bavail		= super->s_free_bytes >> sb->s_blocksize_bits;  in logfs_statfs()
113 static int logfs_sb_set(struct super_block *sb, void *_super)  in logfs_sb_set()  argument
117 	sb->s_fs_info = super;  in logfs_sb_set()
118 	sb->s_mtd = super->s_mtd;  in logfs_sb_set()
119 	sb->s_bdev = super->s_bdev;  in logfs_sb_set()
121 	if (sb->s_bdev)  in logfs_sb_set()
122 		sb->s_bdi = &bdev_get_queue(sb->s_bdev)->backing_dev_info;  in logfs_sb_set()
125 	if (sb->s_mtd)  in logfs_sb_set()
126 		sb->s_bdi = sb->s_mtd->backing_dev_info;  in logfs_sb_set()
131 static int logfs_sb_test(struct super_block *sb, void *_super)  in logfs_sb_test()  argument
136 	if (mtd && sb->s_mtd == mtd)  in logfs_sb_test()
138 	if (super->s_bdev && sb->s_bdev == super->s_bdev)  in logfs_sb_test()
155 static void logfs_write_ds(struct super_block *sb, struct logfs_disk_super *ds,  in logfs_write_ds()  argument
158 	struct logfs_super *super = logfs_super(sb);  in logfs_write_ds()
169 	ds->ds_block_shift	= sb->s_blocksize_bits;  in logfs_write_ds()
187 static int write_one_sb(struct super_block *sb,  in write_one_sb()  argument
188 		struct page *(*find_sb)(struct super_block *sb, u64 *ofs))  in write_one_sb()  argument
190 	struct logfs_super *super = logfs_super(sb);  in write_one_sb()
198 	page = find_sb(sb, &ofs);  in write_one_sb()
202 	segno = seg_no(sb, ofs);  in write_one_sb()
203 	logfs_get_segment_entry(sb, segno, &se);  in write_one_sb()
206 	logfs_set_segment_erased(sb, segno, ec, 0);  in write_one_sb()
207 	logfs_write_ds(sb, ds, segno, ec);  in write_one_sb()
208 	err = super->s_devops->write_sb(sb, page);  in write_one_sb()
213 int logfs_write_sb(struct super_block *sb)  in logfs_write_sb()  argument
215 	struct logfs_super *super = logfs_super(sb);  in logfs_write_sb()
219 	err = write_one_sb(sb, super->s_devops->find_first_sb);  in logfs_write_sb()
224 	err = write_one_sb(sb, super->s_devops->find_last_sb);  in logfs_write_sb()
241 static int logfs_recover_sb(struct super_block *sb)  in logfs_recover_sb()  argument
243 	struct logfs_super *super = logfs_super(sb);  in logfs_recover_sb()
249 	err = wbuf_read(sb, super->s_sb_ofs[0], sizeof(*ds0), ds0);  in logfs_recover_sb()
253 	err = wbuf_read(sb, super->s_sb_ofs[1], sizeof(*ds1), ds1);  in logfs_recover_sb()
261 		return write_one_sb(sb, super->s_devops->find_first_sb);  in logfs_recover_sb()
265 		return write_one_sb(sb, super->s_devops->find_last_sb);  in logfs_recover_sb()
269 		return logfs_write_sb(sb);  in logfs_recover_sb()
277 static int logfs_make_writeable(struct super_block *sb)  in logfs_make_writeable()  argument
281 	err = logfs_open_segfile(sb);  in logfs_make_writeable()
286 	err = logfs_recover_sb(sb);  in logfs_make_writeable()
291 	err = logfs_check_areas(sb);  in logfs_make_writeable()
296 	logfs_gc_pass(sb);  in logfs_make_writeable()
300 	err = logfs_replay_journal(sb);  in logfs_make_writeable()
307 static int logfs_get_sb_final(struct super_block *sb)  in logfs_get_sb_final()  argument
309 	struct logfs_super *super = logfs_super(sb);  in logfs_get_sb_final()
314 	rootdir = logfs_iget(sb, LOGFS_INO_ROOT);  in logfs_get_sb_final()
318 	sb->s_root = d_make_root(rootdir);  in logfs_get_sb_final()
319 	if (!sb->s_root)  in logfs_get_sb_final()
329 	err = logfs_make_writeable(sb);  in logfs_get_sb_final()
359 static struct page *find_super_block(struct super_block *sb)  in find_super_block()  argument
361 	struct logfs_super *super = logfs_super(sb);  in find_super_block()
364 	first = super->s_devops->find_first_sb(sb, &super->s_sb_ofs[0]);  in find_super_block()
367 	last = super->s_devops->find_last_sb(sb, &super->s_sb_ofs[1]);  in find_super_block()
390 static int __logfs_read_sb(struct super_block *sb)  in __logfs_read_sb()  argument
392 	struct logfs_super *super = logfs_super(sb);  in __logfs_read_sb()
397 	page = find_super_block(sb);  in __logfs_read_sb()
409 	sb->s_blocksize = 1 << ds->ds_block_shift;  in __logfs_read_sb()
410 	sb->s_blocksize_bits = ds->ds_block_shift;  in __logfs_read_sb()
414 	super->s_no_blocks = super->s_segsize >> sb->s_blocksize_bits;  in __logfs_read_sb()
432 static int logfs_read_sb(struct super_block *sb, int read_only)  in logfs_read_sb()  argument
434 	struct logfs_super *super = logfs_super(sb);  in logfs_read_sb()
446 	ret = logfs_init_mapping(sb);  in logfs_read_sb()
450 	ret = __logfs_read_sb(sb);  in logfs_read_sb()
460 	ret = logfs_init_rw(sb);  in logfs_read_sb()
464 	ret = logfs_init_areas(sb);  in logfs_read_sb()
468 	ret = logfs_init_gc(sb);  in logfs_read_sb()
472 	ret = logfs_init_journal(sb);  in logfs_read_sb()
479 static void logfs_kill_sb(struct super_block *sb)  in logfs_kill_sb()  argument
481 	struct logfs_super *super = logfs_super(sb);  in logfs_kill_sb()
485 	sync_filesystem(sb);  in logfs_kill_sb()
486 	logfs_write_anchor(sb);  in logfs_kill_sb()
487 	free_areas(sb);  in logfs_kill_sb()
494 	generic_shutdown_super(sb);  in logfs_kill_sb()
499 	logfs_cleanup_gc(sb);  in logfs_kill_sb()
500 	logfs_cleanup_journal(sb);  in logfs_kill_sb()
501 	logfs_cleanup_areas(sb);  in logfs_kill_sb()
502 	logfs_cleanup_rw(sb);  in logfs_kill_sb()
515 	struct super_block *sb;  in logfs_get_sb_device()  local
522 	sb = sget(type, logfs_sb_test, logfs_sb_set, flags | MS_NOATIME, super);  in logfs_get_sb_device()
523 	if (IS_ERR(sb)) {  in logfs_get_sb_device()
526 		return ERR_CAST(sb);  in logfs_get_sb_device()
529 	if (sb->s_root) {  in logfs_get_sb_device()
533 		return dget(sb->s_root);  in logfs_get_sb_device()
542 	sb->s_maxbytes	= (1ull << 43) - 1;  in logfs_get_sb_device()
543 	sb->s_max_links = LOGFS_LINK_MAX;  in logfs_get_sb_device()
544 	sb->s_op	= &logfs_super_operations;  in logfs_get_sb_device()
546 	err = logfs_read_sb(sb, sb->s_flags & MS_RDONLY);  in logfs_get_sb_device()
550 	sb->s_flags |= MS_ACTIVE;  in logfs_get_sb_device()
551 	err = logfs_get_sb_final(sb);  in logfs_get_sb_device()
553 		deactivate_locked_super(sb);  in logfs_get_sb_device()
556 	return dget(sb->s_root);  in logfs_get_sb_device()
563 	deactivate_locked_super(sb);  in logfs_get_sb_device()