96 static int fat_add_cluster(struct inode *inode)  in fat_add_cluster()  argument
100 	err = fat_alloc_clusters(inode, &cluster, 1);  in fat_add_cluster()
105 	err = fat_chain_add(inode, cluster, 1);  in fat_add_cluster()
107 		fat_free_clusters(inode, cluster);  in fat_add_cluster()
111 static inline int __fat_get_block(struct inode *inode, sector_t iblock,  in __fat_get_block()  argument
115 	struct super_block *sb = inode->i_sb;  in __fat_get_block()
121 	err = fat_bmap(inode, iblock, &phys, &mapped_blocks, create);  in __fat_get_block()
132 	if (iblock != MSDOS_I(inode)->mmu_private >> sb->s_blocksize_bits) {  in __fat_get_block()
134 			MSDOS_I(inode)->i_pos, MSDOS_I(inode)->mmu_private);  in __fat_get_block()
141 		err = fat_add_cluster(inode);  in __fat_get_block()
149 	MSDOS_I(inode)->mmu_private += *max_blocks << sb->s_blocksize_bits;  in __fat_get_block()
151 	err = fat_bmap(inode, iblock, &phys, &mapped_blocks, create);  in __fat_get_block()
163 static int fat_get_block(struct inode *inode, sector_t iblock,  in fat_get_block()  argument
166 	struct super_block *sb = inode->i_sb;  in fat_get_block()
167 	unsigned long max_blocks = bh_result->b_size >> inode->i_blkbits;  in fat_get_block()
170 	err = __fat_get_block(inode, iblock, &max_blocks, bh_result, create);  in fat_get_block()
201 	struct inode *inode = mapping->host;  in fat_write_failed()  local
203 	if (to > inode->i_size) {  in fat_write_failed()
204 		truncate_pagecache(inode, inode->i_size);  in fat_write_failed()
205 		fat_truncate_blocks(inode, inode->i_size);  in fat_write_failed()
228 	struct inode *inode = mapping->host;  in fat_write_end()  local
233 	if (!(err < 0) && !(MSDOS_I(inode)->i_attrs & ATTR_ARCH)) {  in fat_write_end()
234 		inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;  in fat_write_end()
235 		MSDOS_I(inode)->i_attrs |= ATTR_ARCH;  in fat_write_end()
236 		mark_inode_dirty(inode);  in fat_write_end()
246 	struct inode *inode = mapping->host;  in fat_direct_IO()  local
261 		if (MSDOS_I(inode)->mmu_private < size)  in fat_direct_IO()
269 	ret = blockdev_direct_IO(iocb, inode, iter, offset, fat_get_block);  in fat_direct_IO()
295 int fat_block_truncate_page(struct inode *inode, loff_t from)  in fat_block_truncate_page()  argument
297 	return block_truncate_page(inode->i_mapping, from, fat_get_block);  in fat_block_truncate_page()
360 void fat_attach(struct inode *inode, loff_t i_pos)  in fat_attach()  argument
362 	struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);  in fat_attach()
364 	if (inode->i_ino != MSDOS_ROOT_INO) {  in fat_attach()
369 		MSDOS_I(inode)->i_pos = i_pos;  in fat_attach()
370 		hlist_add_head(&MSDOS_I(inode)->i_fat_hash, head);  in fat_attach()
378 	if (S_ISDIR(inode->i_mode) && sbi->options.nfs) {  in fat_attach()
380 		d_head += fat_dir_hash(MSDOS_I(inode)->i_logstart);  in fat_attach()
383 		hlist_add_head(&MSDOS_I(inode)->i_dir_hash, d_head);  in fat_attach()
389 void fat_detach(struct inode *inode)  in fat_detach()  argument
391 	struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);  in fat_detach()
393 	MSDOS_I(inode)->i_pos = 0;  in fat_detach()
394 	hlist_del_init(&MSDOS_I(inode)->i_fat_hash);  in fat_detach()
397 	if (S_ISDIR(inode->i_mode) && sbi->options.nfs) {  in fat_detach()
399 		hlist_del_init(&MSDOS_I(inode)->i_dir_hash);  in fat_detach()
405 struct inode *fat_iget(struct super_block *sb, loff_t i_pos)  in fat_iget()
410 	struct inode *inode = NULL;  in fat_iget()  local
417 		inode = igrab(&i->vfs_inode);  in fat_iget()
418 		if (inode)  in fat_iget()
422 	return inode;  in fat_iget()
435 static int fat_calc_dir_size(struct inode *inode)  in fat_calc_dir_size()  argument
437 	struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);  in fat_calc_dir_size()
440 	inode->i_size = 0;  in fat_calc_dir_size()
441 	if (MSDOS_I(inode)->i_start == 0)  in fat_calc_dir_size()
444 	ret = fat_get_cluster(inode, FAT_ENT_EOF, &fclus, &dclus);  in fat_calc_dir_size()
447 	inode->i_size = (fclus + 1) << sbi->cluster_bits;  in fat_calc_dir_size()
453 int fat_fill_inode(struct inode *inode, struct msdos_dir_entry *de)  in fat_fill_inode()  argument
455 	struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);  in fat_fill_inode()
458 	MSDOS_I(inode)->i_pos = 0;  in fat_fill_inode()
459 	inode->i_uid = sbi->options.fs_uid;  in fat_fill_inode()
460 	inode->i_gid = sbi->options.fs_gid;  in fat_fill_inode()
461 	inode->i_version++;  in fat_fill_inode()
462 	inode->i_generation = get_seconds();  in fat_fill_inode()
465 		inode->i_generation &= ~1;  in fat_fill_inode()
466 		inode->i_mode = fat_make_mode(sbi, de->attr, S_IRWXUGO);  in fat_fill_inode()
467 		inode->i_op = sbi->dir_ops;  in fat_fill_inode()
468 		inode->i_fop = &fat_dir_operations;  in fat_fill_inode()
470 		MSDOS_I(inode)->i_start = fat_get_start(sbi, de);  in fat_fill_inode()
471 		MSDOS_I(inode)->i_logstart = MSDOS_I(inode)->i_start;  in fat_fill_inode()
472 		error = fat_calc_dir_size(inode);  in fat_fill_inode()
475 		MSDOS_I(inode)->mmu_private = inode->i_size;  in fat_fill_inode()
477 		set_nlink(inode, fat_subdirs(inode));  in fat_fill_inode()
479 		inode->i_generation |= 1;  in fat_fill_inode()
480 		inode->i_mode = fat_make_mode(sbi, de->attr,  in fat_fill_inode()
483 		MSDOS_I(inode)->i_start = fat_get_start(sbi, de);  in fat_fill_inode()
485 		MSDOS_I(inode)->i_logstart = MSDOS_I(inode)->i_start;  in fat_fill_inode()
486 		inode->i_size = le32_to_cpu(de->size);  in fat_fill_inode()
487 		inode->i_op = &fat_file_inode_operations;  in fat_fill_inode()
488 		inode->i_fop = &fat_file_operations;  in fat_fill_inode()
489 		inode->i_mapping->a_ops = &fat_aops;  in fat_fill_inode()
490 		MSDOS_I(inode)->mmu_private = inode->i_size;  in fat_fill_inode()
494 			inode->i_flags |= S_IMMUTABLE;  in fat_fill_inode()
496 	fat_save_attrs(inode, de->attr);  in fat_fill_inode()
498 	inode->i_blocks = ((inode->i_size + (sbi->cluster_size - 1))  in fat_fill_inode()
501 	fat_time_fat2unix(sbi, &inode->i_mtime, de->time, de->date, 0);  in fat_fill_inode()
503 		fat_time_fat2unix(sbi, &inode->i_ctime, de->ctime,  in fat_fill_inode()
505 		fat_time_fat2unix(sbi, &inode->i_atime, 0, de->adate, 0);  in fat_fill_inode()
507 		inode->i_ctime = inode->i_atime = inode->i_mtime;  in fat_fill_inode()
524 struct inode *fat_build_inode(struct super_block *sb,  in fat_build_inode()
527 	struct inode *inode;  in fat_build_inode()  local
531 	inode = fat_iget(sb, i_pos);  in fat_build_inode()
532 	if (inode)  in fat_build_inode()
534 	inode = new_inode(sb);  in fat_build_inode()
535 	if (!inode) {  in fat_build_inode()
536 		inode = ERR_PTR(-ENOMEM);  in fat_build_inode()
539 	inode->i_ino = iunique(sb, MSDOS_ROOT_INO);  in fat_build_inode()
540 	inode->i_version = 1;  in fat_build_inode()
541 	err = fat_fill_inode(inode, de);  in fat_build_inode()
543 		iput(inode);  in fat_build_inode()
544 		inode = ERR_PTR(err);  in fat_build_inode()
547 	fat_attach(inode, i_pos);  in fat_build_inode()
548 	insert_inode_hash(inode);  in fat_build_inode()
551 	return inode;  in fat_build_inode()
556 static void fat_evict_inode(struct inode *inode)  in fat_evict_inode()  argument
558 	truncate_inode_pages_final(&inode->i_data);  in fat_evict_inode()
559 	if (!inode->i_nlink) {  in fat_evict_inode()
560 		inode->i_size = 0;  in fat_evict_inode()
561 		fat_truncate_blocks(inode, 0);  in fat_evict_inode()
563 	invalidate_inode_buffers(inode);  in fat_evict_inode()
564 	clear_inode(inode);  in fat_evict_inode()
565 	fat_cache_inval_inode(inode);  in fat_evict_inode()
566 	fat_detach(inode);  in fat_evict_inode()
640 static struct inode *fat_alloc_inode(struct super_block *sb)  in fat_alloc_inode()
653 	struct inode *inode = container_of(head, struct inode, i_rcu);  in fat_i_callback()  local
654 	kmem_cache_free(fat_inode_cachep, MSDOS_I(inode));  in fat_i_callback()
657 static void fat_destroy_inode(struct inode *inode)  in fat_destroy_inode()  argument
659 	call_rcu(&inode->i_rcu, fat_i_callback);  in fat_destroy_inode()
742 static int __fat_write_inode(struct inode *inode, int wait)  in __fat_write_inode()  argument
744 	struct super_block *sb = inode->i_sb;  in __fat_write_inode()
752 	if (inode->i_ino == MSDOS_ROOT_INO)  in __fat_write_inode()
756 	i_pos = fat_i_pos_read(sbi, inode);  in __fat_write_inode()
768 	if (i_pos != MSDOS_I(inode)->i_pos) {  in __fat_write_inode()
775 	if (S_ISDIR(inode->i_mode))  in __fat_write_inode()
778 		raw_entry->size = cpu_to_le32(inode->i_size);  in __fat_write_inode()
779 	raw_entry->attr = fat_make_attrs(inode);  in __fat_write_inode()
780 	fat_set_start(raw_entry, MSDOS_I(inode)->i_logstart);  in __fat_write_inode()
781 	fat_time_unix2fat(sbi, &inode->i_mtime, &raw_entry->time,  in __fat_write_inode()
785 		fat_time_unix2fat(sbi, &inode->i_ctime, &raw_entry->ctime,  in __fat_write_inode()
787 		fat_time_unix2fat(sbi, &inode->i_atime, &atime,  in __fat_write_inode()
799 static int fat_write_inode(struct inode *inode, struct writeback_control *wbc)  in fat_write_inode()  argument
803 	if (inode->i_ino == MSDOS_FSINFO_INO) {  in fat_write_inode()
804 		struct super_block *sb = inode->i_sb;  in fat_write_inode()
810 		err = __fat_write_inode(inode, wbc->sync_mode == WB_SYNC_ALL);  in fat_write_inode()
815 int fat_sync_inode(struct inode *inode)  in fat_sync_inode()  argument
817 	return __fat_write_inode(inode, 1);  in fat_sync_inode()
1272 static int fat_read_root(struct inode *inode)  in fat_read_root()  argument
1274 	struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);  in fat_read_root()
1277 	MSDOS_I(inode)->i_pos = MSDOS_ROOT_INO;  in fat_read_root()
1278 	inode->i_uid = sbi->options.fs_uid;  in fat_read_root()
1279 	inode->i_gid = sbi->options.fs_gid;  in fat_read_root()
1280 	inode->i_version++;  in fat_read_root()
1281 	inode->i_generation = 0;  in fat_read_root()
1282 	inode->i_mode = fat_make_mode(sbi, ATTR_DIR, S_IRWXUGO);  in fat_read_root()
1283 	inode->i_op = sbi->dir_ops;  in fat_read_root()
1284 	inode->i_fop = &fat_dir_operations;  in fat_read_root()
1286 		MSDOS_I(inode)->i_start = sbi->root_cluster;  in fat_read_root()
1287 		error = fat_calc_dir_size(inode);  in fat_read_root()
1291 		MSDOS_I(inode)->i_start = 0;  in fat_read_root()
1292 		inode->i_size = sbi->dir_entries * sizeof(struct msdos_dir_entry);  in fat_read_root()
1294 	inode->i_blocks = ((inode->i_size + (sbi->cluster_size - 1))  in fat_read_root()
1296 	MSDOS_I(inode)->i_logstart = 0;  in fat_read_root()
1297 	MSDOS_I(inode)->mmu_private = inode->i_size;  in fat_read_root()
1299 	fat_save_attrs(inode, ATTR_DIR);  in fat_read_root()
1300 	inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec = 0;  in fat_read_root()
1301 	inode->i_mtime.tv_nsec = inode->i_atime.tv_nsec = inode->i_ctime.tv_nsec = 0;  in fat_read_root()
1302 	set_nlink(inode, fat_subdirs(inode)+2);  in fat_read_root()
1489 	struct inode *root_inode = NULL, *fat_inode = NULL;  in fat_fill_super()
1490 	struct inode *fsinfo_inode = NULL;  in fat_fill_super()
1783 static int writeback_inode(struct inode *inode)  in writeback_inode()  argument
1792 	ret = sync_inode_metadata(inode, 0);  in writeback_inode()
1794 		ret = filemap_fdatawrite(inode->i_mapping);  in writeback_inode()
1806 int fat_flush_inodes(struct super_block *sb, struct inode *i1, struct inode *i2)  in fat_flush_inodes()