ufs.h

  1/* SPDX-License-Identifier: GPL-2.0 */
  2#ifndef _UFS_UFS_H
  3#define _UFS_UFS_H 1
  4
  5#ifdef pr_fmt
  6#undef pr_fmt
  7#endif
  8
  9#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 10
 11#define UFS_MAX_GROUP_LOADED 8
 12#define UFS_CGNO_EMPTY ((unsigned)-1)
 13
 14struct ufs_sb_private_info;
 15struct ufs_cg_private_info;
 16struct ufs_csum;
 17
 18struct ufs_sb_info {
 19	struct ufs_sb_private_info * s_uspi;
 20	struct ufs_csum	* s_csp;
 21	unsigned s_bytesex;
 22	unsigned s_flags;
 23	struct buffer_head ** s_ucg;
 24	struct ufs_cg_private_info * s_ucpi[UFS_MAX_GROUP_LOADED];
 25	unsigned s_cgno[UFS_MAX_GROUP_LOADED];
 26	unsigned short s_cg_loaded;
 27	unsigned s_flavour;
 28	unsigned s_on_err;
 29	struct super_block *sb;
 30	int work_queued; /* non-zero if the delayed work is queued */
 31	struct delayed_work sync_work; /* FS sync delayed work */
 32	spinlock_t work_lock; /* protects sync_work and work_queued */
 33	struct mutex s_lock;
 34};
 35
 36struct ufs_inode_info {
 37	union {
 38		__fs32	i_data[15];
 39		__u8	i_symlink[2 * 4 * 15];
 40		__fs64	u2_i_data[15];
 41	} i_u1;
 42	__u32	i_flags;
 43	__u32	i_shadow;
 44	__u32	i_unused1;
 45	__u32	i_unused2;
 46	__u32	i_oeftflag;
 47	__u16	i_osync;
 48	__u64	i_lastfrag;
 49	seqlock_t meta_lock;
 50	struct mutex	truncate_mutex;
 51	__u32   i_dir_start_lookup;
 52	struct inode vfs_inode;
 53};
 54
 55/* mount options */
 56#define UFS_MOUNT_ONERROR_PANIC		0x00000001
 57#define UFS_MOUNT_ONERROR_LOCK		0x00000002
 58#define UFS_MOUNT_ONERROR_UMOUNT	0x00000004
 59#define UFS_MOUNT_ONERROR_REPAIR	0x00000008
 60
 61#define UFS_MOUNT_UFSTYPE_OLD		0x00000010
 62#define UFS_MOUNT_UFSTYPE_44BSD		0x00000020
 63#define UFS_MOUNT_UFSTYPE_SUN		0x00000040
 64#define UFS_MOUNT_UFSTYPE_NEXTSTEP	0x00000080
 65#define UFS_MOUNT_UFSTYPE_NEXTSTEP_CD	0x00000100
 66#define UFS_MOUNT_UFSTYPE_OPENSTEP	0x00000200
 67#define UFS_MOUNT_UFSTYPE_SUNx86	0x00000400
 68#define UFS_MOUNT_UFSTYPE_HP	        0x00000800
 69#define UFS_MOUNT_UFSTYPE_UFS2		0x00001000
 70#define UFS_MOUNT_UFSTYPE_SUNOS		0x00002000
 71
 72/*
 73 * Debug code
 74 */
 75#ifdef CONFIG_UFS_DEBUG
 76#	define UFSD(f, a...)	{					\
 77		pr_debug("UFSD (%s, %d): %s:",				\
 78			__FILE__, __LINE__, __func__);		\
 79		pr_debug(f, ## a);					\
 80	}
 81#else
 82#	define UFSD(f, a...)	/**/
 83#endif
 84
 85/* balloc.c */
 86void ufs_free_fragments (struct inode *, u64 fragment, unsigned count);
 87void ufs_free_blocks (struct inode *, u64 fragment, unsigned count);
 88u64 ufs_new_fragments(struct inode *, void *, u64 fragment, u64 goal,
 89		unsigned count, int *err, struct folio *);
 90
 91/* cylinder.c */
 92extern struct ufs_cg_private_info * ufs_load_cylinder (struct super_block *, unsigned);
 93extern void ufs_put_cylinder (struct super_block *, unsigned);
 94
 95/* dir.c */
 96extern const struct inode_operations ufs_dir_inode_operations;
 97
 98int ufs_add_link(struct dentry *, struct inode *);
 99ino_t ufs_inode_by_name(struct inode *, const struct qstr *);
100int ufs_make_empty(struct inode *, struct inode *);
101struct ufs_dir_entry *ufs_find_entry(struct inode *, const struct qstr *,
102		struct folio **);
103int ufs_delete_entry(struct inode *, struct ufs_dir_entry *, struct folio *);
104int ufs_empty_dir(struct inode *);
105struct ufs_dir_entry *ufs_dotdot(struct inode *, struct folio **);
106int ufs_set_link(struct inode *dir, struct ufs_dir_entry *de,
107		 struct folio *folio, struct inode *inode, bool update_times);
108
109/* file.c */
110extern const struct inode_operations ufs_file_inode_operations;
111extern const struct file_operations ufs_file_operations;
112extern const struct address_space_operations ufs_aops;
113
114/* ialloc.c */
115extern void ufs_free_inode (struct inode *inode);
116extern struct inode * ufs_new_inode (struct inode *, umode_t);
117
118/* inode.c */
119extern struct inode *ufs_iget(struct super_block *, unsigned long);
120extern int ufs_write_inode (struct inode *, struct writeback_control *);
121extern int ufs_sync_inode (struct inode *);
122extern void ufs_evict_inode (struct inode *);
123extern int ufs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
124		       struct iattr *attr);
125
126/* namei.c */
127extern const struct file_operations ufs_dir_operations;
128
129/* super.c */
130extern __printf(3, 4)
131void ufs_warning(struct super_block *, const char *, const char *, ...);
132extern __printf(3, 4)
133void ufs_error(struct super_block *, const char *, const char *, ...);
134extern __printf(3, 4)
135void ufs_panic(struct super_block *, const char *, const char *, ...);
136void ufs_mark_sb_dirty(struct super_block *sb);
137
138static inline struct ufs_sb_info *UFS_SB(struct super_block *sb)
139{
140	return sb->s_fs_info;
141}
142
143static inline struct ufs_inode_info *UFS_I(struct inode *inode)
144{
145	return container_of(inode, struct ufs_inode_info, vfs_inode);
146}
147
148/*
149 * Give cylinder group number for a file system block.
150 * Give cylinder group block number for a file system block.
151 */
152/* #define	ufs_dtog(d)	((d) / uspi->s_fpg) */
153static inline u64 ufs_dtog(struct ufs_sb_private_info * uspi, u64 b)
154{
155	do_div(b, uspi->s_fpg);
156	return b;
157}
158/* #define	ufs_dtogd(d)	((d) % uspi->s_fpg) */
159static inline u32 ufs_dtogd(struct ufs_sb_private_info * uspi, u64 b)
160{
161	return do_div(b, uspi->s_fpg);
162}
163
164#endif /* _UFS_UFS_H */