41 static void ext2_write_super(struct super_block *sb);
42 static int ext2_remount (struct super_block * sb, int * flags, char * data);
44 static int ext2_sync_fs(struct super_block *sb, int wait);
45 static int ext2_freeze(struct super_block *sb);
46 static int ext2_unfreeze(struct super_block *sb);
48 void ext2_error(struct super_block *sb, const char *function,  in ext2_error()  argument
53 	struct ext2_sb_info *sbi = EXT2_SB(sb);  in ext2_error()
56 	if (!sb_rdonly(sb)) {  in ext2_error()
61 		ext2_sync_super(sb, es, 1);  in ext2_error()
70 	       sb->s_id, function, &vaf);  in ext2_error()
74 	if (test_opt(sb, ERRORS_PANIC))  in ext2_error()
76 	if (test_opt(sb, ERRORS_RO)) {  in ext2_error()
77 		ext2_msg(sb, KERN_CRIT,  in ext2_error()
79 		sb->s_flags |= SB_RDONLY;  in ext2_error()
83 void ext2_msg(struct super_block *sb, const char *prefix,  in ext2_msg()  argument
94 	printk("%sEXT2-fs (%s): %pV\n", prefix, sb->s_id, &vaf);  in ext2_msg()
102 void ext2_update_dynamic_rev(struct super_block *sb)  in ext2_update_dynamic_rev()  argument
104 	struct ext2_super_block *es = EXT2_SB(sb)->s_es;  in ext2_update_dynamic_rev()
109 	ext2_msg(sb, KERN_WARNING,  in ext2_update_dynamic_rev()
128 static int ext2_quota_off(struct super_block *sb, int type);
130 static void ext2_quota_off_umount(struct super_block *sb)  in ext2_quota_off_umount()  argument
135 		ext2_quota_off(sb, type);  in ext2_quota_off_umount()
138 static inline void ext2_quota_off_umount(struct super_block *sb)  in ext2_quota_off_umount()  argument
143 static void ext2_put_super (struct super_block * sb)  in ext2_put_super()  argument
147 	struct ext2_sb_info *sbi = EXT2_SB(sb);  in ext2_put_super()
149 	ext2_quota_off_umount(sb);  in ext2_put_super()
155 	if (!sb_rdonly(sb)) {  in ext2_put_super()
161 		ext2_sync_super(sb, es, 1);  in ext2_put_super()
173 	sb->s_fs_info = NULL;  in ext2_put_super()
181 static struct inode *ext2_alloc_inode(struct super_block *sb)  in ext2_alloc_inode()  argument
248 	struct super_block *sb = root->d_sb;  in ext2_show_options()  local
249 	struct ext2_sb_info *sbi = EXT2_SB(sb);  in ext2_show_options()
258 	if (test_opt(sb, MINIX_DF))  in ext2_show_options()
260 	if (test_opt(sb, GRPID))  in ext2_show_options()
262 	if (!test_opt(sb, GRPID) && (def_mount_opts & EXT2_DEFM_BSDGROUPS))  in ext2_show_options()
274 	if (test_opt(sb, ERRORS_RO)) {  in ext2_show_options()
282 	if (test_opt(sb, ERRORS_CONT))  in ext2_show_options()
284 	if (test_opt(sb, ERRORS_PANIC))  in ext2_show_options()
286 	if (test_opt(sb, NO_UID32))  in ext2_show_options()
288 	if (test_opt(sb, DEBUG))  in ext2_show_options()
290 	if (test_opt(sb, OLDALLOC))  in ext2_show_options()
294 	if (test_opt(sb, XATTR_USER))  in ext2_show_options()
296 	if (!test_opt(sb, XATTR_USER) &&  in ext2_show_options()
303 	if (test_opt(sb, POSIX_ACL))  in ext2_show_options()
305 	if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT2_DEFM_ACL))  in ext2_show_options()
309 	if (test_opt(sb, NOBH))  in ext2_show_options()
327 	if (!test_opt(sb, RESERVATION))  in ext2_show_options()
335 static ssize_t ext2_quota_read(struct super_block *sb, int type, char *data, size_t len, loff_t off…
336 static ssize_t ext2_quota_write(struct super_block *sb, int type, const char *data, size_t len, lof…
337 static int ext2_quota_on(struct super_block *sb, int type, int format_id,
375 static struct inode *ext2_nfs_get_inode(struct super_block *sb,  in ext2_nfs_get_inode()  argument
380 	if (ino < EXT2_FIRST_INO(sb) && ino != EXT2_ROOT_INO)  in ext2_nfs_get_inode()
382 	if (ino > le32_to_cpu(EXT2_SB(sb)->s_es->s_inodes_count))  in ext2_nfs_get_inode()
390 	inode = ext2_iget(sb, ino);  in ext2_nfs_get_inode()
401 static struct dentry *ext2_fh_to_dentry(struct super_block *sb, struct fid *fid,  in ext2_fh_to_dentry()  argument
404 	return generic_fh_to_dentry(sb, fid, fh_len, fh_type,  in ext2_fh_to_dentry()
408 static struct dentry *ext2_fh_to_parent(struct super_block *sb, struct fid *fid,  in ext2_fh_to_parent()  argument
411 	return generic_fh_to_parent(sb, fid, fh_len, fh_type,  in ext2_fh_to_parent()
485 static int parse_options(char *options, struct super_block *sb,  in parse_options()  argument
521 				ext2_msg(sb, KERN_ERR, "Invalid uid value %d", option);  in parse_options()
532 				ext2_msg(sb, KERN_ERR, "Invalid gid value %d", option);  in parse_options()
560 			ext2_msg(sb, KERN_WARNING,  in parse_options()
587 			ext2_msg(sb, KERN_INFO, "(no)user_xattr options"  in parse_options()
601 			ext2_msg(sb, KERN_INFO,  in parse_options()
606 			ext2_msg(sb, KERN_INFO, "use dax instead of xip");  in parse_options()
611 			ext2_msg(sb, KERN_WARNING,  in parse_options()
615 			ext2_msg(sb, KERN_INFO, "dax option not supported");  in parse_options()
632 			ext2_msg(sb, KERN_INFO,  in parse_options()
639 			ext2_msg(sb, KERN_INFO, "reservations ON");  in parse_options()
643 			ext2_msg(sb, KERN_INFO, "reservations OFF");  in parse_options()
654 static int ext2_setup_super (struct super_block * sb,  in ext2_setup_super()  argument
659 	struct ext2_sb_info *sbi = EXT2_SB(sb);  in ext2_setup_super()
662 		ext2_msg(sb, KERN_ERR,  in ext2_setup_super()
670 		ext2_msg(sb, KERN_WARNING,  in ext2_setup_super()
674 		ext2_msg(sb, KERN_WARNING,  in ext2_setup_super()
680 		ext2_msg(sb, KERN_WARNING,  in ext2_setup_super()
687 		ext2_msg(sb, KERN_WARNING,  in ext2_setup_super()
693 	if (test_opt (sb, DEBUG))  in ext2_setup_super()
694 		ext2_msg(sb, KERN_INFO, "%s, %s, bs=%lu, fs=%lu, gc=%lu, "  in ext2_setup_super()
696 			EXT2FS_VERSION, EXT2FS_DATE, sb->s_blocksize,  in ext2_setup_super()
699 			EXT2_BLOCKS_PER_GROUP(sb),  in ext2_setup_super()
700 			EXT2_INODES_PER_GROUP(sb),  in ext2_setup_super()
705 static int ext2_check_descriptors(struct super_block *sb)  in ext2_check_descriptors()  argument
708 	struct ext2_sb_info *sbi = EXT2_SB(sb);  in ext2_check_descriptors()
713 		struct ext2_group_desc *gdp = ext2_get_group_desc(sb, i, NULL);  in ext2_check_descriptors()
714 		ext2_fsblk_t first_block = ext2_group_first_block_no(sb, i);  in ext2_check_descriptors()
721 				(EXT2_BLOCKS_PER_GROUP(sb) - 1);  in ext2_check_descriptors()
726 			ext2_error (sb, "ext2_check_descriptors",  in ext2_check_descriptors()
735 			ext2_error (sb, "ext2_check_descriptors",  in ext2_check_descriptors()
745 			ext2_error (sb, "ext2_check_descriptors",  in ext2_check_descriptors()
802 static unsigned long descriptor_loc(struct super_block *sb,  in descriptor_loc()  argument
806 	struct ext2_sb_info *sbi = EXT2_SB(sb);  in descriptor_loc()
812 	if (!EXT2_HAS_INCOMPAT_FEATURE(sb, EXT2_FEATURE_INCOMPAT_META_BG) ||  in descriptor_loc()
816 	if (ext2_bg_has_super(sb, bg))  in descriptor_loc()
819 	return ext2_group_first_block_no(sb, bg) + has_super;  in descriptor_loc()
822 static int ext2_fill_super(struct super_block *sb, void *data, int silent)  in ext2_fill_super()  argument
824 	struct dax_device *dax_dev = fs_dax_get_by_bdev(sb->s_bdev);  in ext2_fill_super()
852 	sb->s_fs_info = sbi;  in ext2_fill_super()
866 	blocksize = sb_min_blocksize(sb, BLOCK_SIZE);  in ext2_fill_super()
868 		ext2_msg(sb, KERN_ERR, "error: unable to set blocksize");  in ext2_fill_super()
883 	if (!(bh = sb_bread(sb, logic_sb_block))) {  in ext2_fill_super()
884 		ext2_msg(sb, KERN_ERR, "error: unable to read superblock");  in ext2_fill_super()
893 	sb->s_magic = le16_to_cpu(es->s_magic);  in ext2_fill_super()
895 	if (sb->s_magic != EXT2_SUPER_MAGIC)  in ext2_fill_super()
927 	if (!parse_options((char *) data, sb, &opts))  in ext2_fill_super()
934 	sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |  in ext2_fill_super()
935 		((EXT2_SB(sb)->s_mount_opt & EXT2_MOUNT_POSIX_ACL) ?  in ext2_fill_super()
937 	sb->s_iflags |= SB_I_CGROUPWB;  in ext2_fill_super()
940 	    (EXT2_HAS_COMPAT_FEATURE(sb, ~0U) ||  in ext2_fill_super()
941 	     EXT2_HAS_RO_COMPAT_FEATURE(sb, ~0U) ||  in ext2_fill_super()
942 	     EXT2_HAS_INCOMPAT_FEATURE(sb, ~0U)))  in ext2_fill_super()
943 		ext2_msg(sb, KERN_WARNING,  in ext2_fill_super()
951 	features = EXT2_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP);  in ext2_fill_super()
953 		ext2_msg(sb, KERN_ERR,	"error: couldn't mount because of "  in ext2_fill_super()
958 	if (!sb_rdonly(sb) && (features = EXT2_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP))){  in ext2_fill_super()
959 		ext2_msg(sb, KERN_ERR, "error: couldn't mount RDWR because of "  in ext2_fill_super()
968 		if (!bdev_dax_supported(sb->s_bdev, blocksize)) {  in ext2_fill_super()
969 			ext2_msg(sb, KERN_ERR,  in ext2_fill_super()
976 	if (sb->s_blocksize != blocksize) {  in ext2_fill_super()
979 		if (!sb_set_blocksize(sb, blocksize)) {  in ext2_fill_super()
980 			ext2_msg(sb, KERN_ERR,  in ext2_fill_super()
987 		bh = sb_bread(sb, logic_sb_block);  in ext2_fill_super()
989 			ext2_msg(sb, KERN_ERR, "error: couldn't read"  in ext2_fill_super()
996 			ext2_msg(sb, KERN_ERR, "error: magic mismatch");  in ext2_fill_super()
1001 	sb->s_maxbytes = ext2_max_size(sb->s_blocksize_bits);  in ext2_fill_super()
1002 	sb->s_max_links = EXT2_LINK_MAX;  in ext2_fill_super()
1013 			ext2_msg(sb, KERN_ERR,  in ext2_fill_super()
1024 	sbi->s_frags_per_block = sb->s_blocksize / sbi->s_frag_size;  in ext2_fill_super()
1030 	if (EXT2_INODE_SIZE(sb) == 0)  in ext2_fill_super()
1032 	sbi->s_inodes_per_block = sb->s_blocksize / EXT2_INODE_SIZE(sb);  in ext2_fill_super()
1037 	sbi->s_desc_per_block = sb->s_blocksize /  in ext2_fill_super()
1042 		ilog2 (EXT2_ADDR_PER_BLOCK(sb));  in ext2_fill_super()
1044 		ilog2 (EXT2_DESC_PER_BLOCK(sb));  in ext2_fill_super()
1046 	if (sb->s_magic != EXT2_SUPER_MAGIC)  in ext2_fill_super()
1049 	if (sb->s_blocksize != bh->b_size) {  in ext2_fill_super()
1051 			ext2_msg(sb, KERN_ERR, "error: unsupported blocksize");  in ext2_fill_super()
1055 	if (sb->s_blocksize != sbi->s_frag_size) {  in ext2_fill_super()
1056 		ext2_msg(sb, KERN_ERR,  in ext2_fill_super()
1059 			sbi->s_frag_size, sb->s_blocksize);  in ext2_fill_super()
1063 	if (sbi->s_blocks_per_group > sb->s_blocksize * 8) {  in ext2_fill_super()
1064 		ext2_msg(sb, KERN_ERR,  in ext2_fill_super()
1069 	if (sbi->s_frags_per_group > sb->s_blocksize * 8) {  in ext2_fill_super()
1070 		ext2_msg(sb, KERN_ERR,  in ext2_fill_super()
1075 	if (sbi->s_inodes_per_group > sb->s_blocksize * 8) {  in ext2_fill_super()
1076 		ext2_msg(sb, KERN_ERR,  in ext2_fill_super()
1082 	if (EXT2_BLOCKS_PER_GROUP(sb) == 0)  in ext2_fill_super()
1086  					/ EXT2_BLOCKS_PER_GROUP(sb)) + 1;  in ext2_fill_super()
1087 	db_count = (sbi->s_groups_count + EXT2_DESC_PER_BLOCK(sb) - 1) /  in ext2_fill_super()
1088 		   EXT2_DESC_PER_BLOCK(sb);  in ext2_fill_super()
1093 		ext2_msg(sb, KERN_ERR, "error: not enough memory");  in ext2_fill_super()
1099 		ext2_msg(sb, KERN_ERR, "error: not enough memory");  in ext2_fill_super()
1103 		block = descriptor_loc(sb, logic_sb_block, i);  in ext2_fill_super()
1104 		sbi->s_group_desc[i] = sb_bread(sb, block);  in ext2_fill_super()
1108 			ext2_msg(sb, KERN_ERR,  in ext2_fill_super()
1113 	if (!ext2_check_descriptors (sb)) {  in ext2_fill_super()
1114 		ext2_msg(sb, KERN_ERR, "group descriptors corrupted");  in ext2_fill_super()
1134 	ext2_rsv_window_add(sb, &sbi->s_rsv_window_head);  in ext2_fill_super()
1137 				ext2_count_free_blocks(sb), GFP_KERNEL);  in ext2_fill_super()
1140 				ext2_count_free_inodes(sb), GFP_KERNEL);  in ext2_fill_super()
1144 				ext2_count_dirs(sb), GFP_KERNEL);  in ext2_fill_super()
1147 		ext2_msg(sb, KERN_ERR, "error: insufficient memory");  in ext2_fill_super()
1154 		ext2_msg(sb, KERN_ERR, "Failed to create ea_block_cache");  in ext2_fill_super()
1161 	sb->s_op = &ext2_sops;  in ext2_fill_super()
1162 	sb->s_export_op = &ext2_export_ops;  in ext2_fill_super()
1163 	sb->s_xattr = ext2_xattr_handlers;  in ext2_fill_super()
1166 	sb->dq_op = &dquot_operations;  in ext2_fill_super()
1167 	sb->s_qcop = &ext2_quotactl_ops;  in ext2_fill_super()
1168 	sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;  in ext2_fill_super()
1171 	root = ext2_iget(sb, EXT2_ROOT_INO);  in ext2_fill_super()
1178 		ext2_msg(sb, KERN_ERR, "error: corrupt root inode, run e2fsck");  in ext2_fill_super()
1182 	sb->s_root = d_make_root(root);  in ext2_fill_super()
1183 	if (!sb->s_root) {  in ext2_fill_super()
1184 		ext2_msg(sb, KERN_ERR, "error: get root inode failed");  in ext2_fill_super()
1188 	if (EXT2_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL))  in ext2_fill_super()
1189 		ext2_msg(sb, KERN_WARNING,  in ext2_fill_super()
1191 	if (ext2_setup_super (sb, es, sb_rdonly(sb)))  in ext2_fill_super()
1192 		sb->s_flags |= SB_RDONLY;  in ext2_fill_super()
1193 	ext2_write_super(sb);  in ext2_fill_super()
1198 		ext2_msg(sb, KERN_ERR,  in ext2_fill_super()
1200 			sb->s_id);  in ext2_fill_super()
1217 	sb->s_fs_info = NULL;  in ext2_fill_super()
1225 static void ext2_clear_super_error(struct super_block *sb)  in ext2_clear_super_error()  argument
1227 	struct buffer_head *sbh = EXT2_SB(sb)->s_sbh;  in ext2_clear_super_error()
1238 		ext2_msg(sb, KERN_ERR,  in ext2_clear_super_error()
1245 void ext2_sync_super(struct super_block *sb, struct ext2_super_block *es,  in ext2_sync_super()  argument
1248 	ext2_clear_super_error(sb);  in ext2_sync_super()
1249 	spin_lock(&EXT2_SB(sb)->s_lock);  in ext2_sync_super()
1250 	es->s_free_blocks_count = cpu_to_le32(ext2_count_free_blocks(sb));  in ext2_sync_super()
1251 	es->s_free_inodes_count = cpu_to_le32(ext2_count_free_inodes(sb));  in ext2_sync_super()
1254 	spin_unlock(&EXT2_SB(sb)->s_lock);  in ext2_sync_super()
1255 	mark_buffer_dirty(EXT2_SB(sb)->s_sbh);  in ext2_sync_super()
1257 		sync_dirty_buffer(EXT2_SB(sb)->s_sbh);  in ext2_sync_super()
1270 static int ext2_sync_fs(struct super_block *sb, int wait)  in ext2_sync_fs()  argument
1272 	struct ext2_sb_info *sbi = EXT2_SB(sb);  in ext2_sync_fs()
1273 	struct ext2_super_block *es = EXT2_SB(sb)->s_es;  in ext2_sync_fs()
1279 	dquot_writeback_dquots(sb, -1);  in ext2_sync_fs()
1287 	ext2_sync_super(sb, es, wait);  in ext2_sync_fs()
1291 static int ext2_freeze(struct super_block *sb)  in ext2_freeze()  argument
1293 	struct ext2_sb_info *sbi = EXT2_SB(sb);  in ext2_freeze()
1300 	if (atomic_long_read(&sb->s_remove_count)) {  in ext2_freeze()
1301 		ext2_sync_fs(sb, 1);  in ext2_freeze()
1308 	ext2_sync_super(sb, sbi->s_es, 1);  in ext2_freeze()
1313 static int ext2_unfreeze(struct super_block *sb)  in ext2_unfreeze()  argument
1316 	ext2_write_super(sb);  in ext2_unfreeze()
1321 static void ext2_write_super(struct super_block *sb)  in ext2_write_super()  argument
1323 	if (!sb_rdonly(sb))  in ext2_write_super()
1324 		ext2_sync_fs(sb, 1);  in ext2_write_super()
1327 static int ext2_remount (struct super_block * sb, int * flags, char * data)  in ext2_remount()  argument
1329 	struct ext2_sb_info * sbi = EXT2_SB(sb);  in ext2_remount()
1334 	sync_filesystem(sb);  in ext2_remount()
1342 	if (!parse_options(data, sb, &new_opts))  in ext2_remount()
1348 		ext2_msg(sb, KERN_WARNING, "warning: refusing change of "  in ext2_remount()
1352 	if ((bool)(*flags & SB_RDONLY) == sb_rdonly(sb))  in ext2_remount()
1367 		err = dquot_suspend(sb, -1);  in ext2_remount()
1371 		ext2_sync_super(sb, es, 1);  in ext2_remount()
1373 		__le32 ret = EXT2_HAS_RO_COMPAT_FEATURE(sb,  in ext2_remount()
1377 			ext2_msg(sb, KERN_WARNING,  in ext2_remount()
1389 		if (!ext2_setup_super (sb, es, 0))  in ext2_remount()
1390 			sb->s_flags &= ~SB_RDONLY;  in ext2_remount()
1393 		ext2_write_super(sb);  in ext2_remount()
1395 		dquot_resume(sb, -1);  in ext2_remount()
1403 	sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |  in ext2_remount()
1412 	struct super_block *sb = dentry->d_sb;  in ext2_statfs()  local
1413 	struct ext2_sb_info *sbi = EXT2_SB(sb);  in ext2_statfs()
1419 	if (test_opt (sb, MINIX_DF))  in ext2_statfs()
1443 			overhead += ext2_bg_has_super(sb, i) +  in ext2_statfs()
1444 				ext2_bg_num_gdb(sb, i);  in ext2_statfs()
1458 	buf->f_bsize = sb->s_blocksize;  in ext2_statfs()
1460 	buf->f_bfree = ext2_count_free_blocks(sb);  in ext2_statfs()
1466 	buf->f_ffree = ext2_count_free_inodes(sb);  in ext2_statfs()
1489 static ssize_t ext2_quota_read(struct super_block *sb, int type, char *data,  in ext2_quota_read()  argument
1492 	struct inode *inode = sb_dqopt(sb)->files[type];  in ext2_quota_read()
1493 	sector_t blk = off >> EXT2_BLOCK_SIZE_BITS(sb);  in ext2_quota_read()
1495 	int offset = off & (sb->s_blocksize - 1);  in ext2_quota_read()
1508 		tocopy = sb->s_blocksize - offset < toread ?  in ext2_quota_read()
1509 				sb->s_blocksize - offset : toread;  in ext2_quota_read()
1512 		tmp_bh.b_size = sb->s_blocksize;  in ext2_quota_read()
1519 			bh = sb_bread(sb, tmp_bh.b_blocknr);  in ext2_quota_read()
1534 static ssize_t ext2_quota_write(struct super_block *sb, int type,  in ext2_quota_write()  argument
1537 	struct inode *inode = sb_dqopt(sb)->files[type];  in ext2_quota_write()
1538 	sector_t blk = off >> EXT2_BLOCK_SIZE_BITS(sb);  in ext2_quota_write()
1540 	int offset = off & (sb->s_blocksize - 1);  in ext2_quota_write()
1547 		tocopy = sb->s_blocksize - offset < towrite ?  in ext2_quota_write()
1548 				sb->s_blocksize - offset : towrite;  in ext2_quota_write()
1551 		tmp_bh.b_size = sb->s_blocksize;  in ext2_quota_write()
1555 		if (offset || tocopy != EXT2_BLOCK_SIZE(sb))  in ext2_quota_write()
1556 			bh = sb_bread(sb, tmp_bh.b_blocknr);  in ext2_quota_write()
1558 			bh = sb_getblk(sb, tmp_bh.b_blocknr);  in ext2_quota_write()
1586 static int ext2_quota_on(struct super_block *sb, int type, int format_id,  in ext2_quota_on()  argument
1592 	err = dquot_quota_on(sb, type, format_id, path);  in ext2_quota_on()
1607 static int ext2_quota_off(struct super_block *sb, int type)  in ext2_quota_off()  argument
1609 	struct inode *inode = sb_dqopt(sb)->files[type];  in ext2_quota_off()
1615 	err = dquot_quota_off(sb, type);  in ext2_quota_off()
1628 	return dquot_quota_off(sb, type);  in ext2_quota_off()