include/linux/fs.h

1313 struct super_block {  struct
1314 	struct list_head	s_list;		/* Keep this first */
1315 	dev_t			s_dev;		/* search index; _not_ kdev_t */
1316 	unsigned char		s_blocksize_bits;
1317 	unsigned long		s_blocksize;
1318 	loff_t			s_maxbytes;	/* Max file size */
1319 	struct file_system_type	*s_type;
1320 	const struct super_operations	*s_op;
1321 	const struct dquot_operations	*dq_op;
1322 	const struct quotactl_ops	*s_qcop;
1323 	const struct export_operations *s_export_op;
1324 	unsigned long		s_flags;
1325 	unsigned long		s_iflags;	/* internal SB_I_* flags */
1326 	unsigned long		s_magic;
1327 	struct dentry		*s_root;
1328 	struct rw_semaphore	s_umount;
1329 	int			s_count;
1330 	atomic_t		s_active;
1332 	void                    *s_security;
1334 	const struct xattr_handler * const *s_xattr;
1336 	const struct fscrypt_operations	*s_cop;
1337 	struct fscrypt_keyring	*s_master_keys; /* master crypto keys in use */
1340 	const struct fsverity_operations *s_vop;
1343 	struct unicode_map *s_encoding;
1344 	__u16 s_encoding_flags;
1346 	struct hlist_bl_head	s_roots;	/* alternate root dentries for NFS */
1347 	struct list_head	s_mounts;	/* list of mounts; _not_ for fs use */
1348 	struct block_device	*s_bdev;	/* can go away once we use an accessor for @s_bdev_file */
1349 	struct file		*s_bdev_file;
1350 	struct backing_dev_info *s_bdi;
1351 	struct mtd_info		*s_mtd;
1352 	struct hlist_node	s_instances;
1353 	unsigned int		s_quota_types;	/* Bitmask of supported quota types */
1354 	struct quota_info	s_dquot;	/* Diskquota specific options */
1356 	struct sb_writers	s_writers;
1363 	void			*s_fs_info;	/* Filesystem private info */
1366 	u32			s_time_gran;
1368 	time64_t		   s_time_min;
1369 	time64_t		   s_time_max;
1371 	u32			s_fsnotify_mask;
1372 	struct fsnotify_sb_info	*s_fsnotify_info;
1385 	char			s_id[32];	/* Informational name */
1386 	uuid_t			s_uuid;		/* UUID */
1387 	u8			s_uuid_len;	/* Default 16, possibly smaller for weird filesystems */
1390 	char			s_sysfs_name[UUID_STRING_LEN + 1];
1392 	unsigned int		s_max_links;
1398 	struct mutex s_vfs_rename_mutex;	/* Kludge */
1404 	const char *s_subtype;
1406 	const struct dentry_operations *s_d_op; /* default d_op for dentries */
1408 	struct shrinker *s_shrink;	/* per-sb shrinker handle */
1411 	atomic_long_t s_remove_count;
1414 	int s_readonly_remount;
1417 	errseq_t s_wb_err;
1420 	struct workqueue_struct *s_dio_done_wq;
1421 	struct hlist_head s_pins;
1428 	struct user_namespace *s_user_ns;
1435 	struct list_lru		s_dentry_lru;
1436 	struct list_lru		s_inode_lru;
1437 	struct rcu_head		rcu;
1438 	struct work_struct	destroy_work;
1440 	struct mutex		s_sync_lock;	/* sync serialisation lock */
1445 	int s_stack_depth;
1448 	spinlock_t		s_inode_list_lock ____cacheline_aligned_in_smp;
1449 	struct list_head	s_inodes;	/* all inodes */
1451 	spinlock_t		s_inode_wblist_lock;
1452 	struct list_head	s_inodes_wb;	/* writeback inodes */