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Linux/fs/ufs/ufs.h

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  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 
 14 struct ufs_sb_private_info;
 15 struct ufs_cg_private_info;
 16 struct ufs_csum;
 17 
 18 struct 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_mount_opt;
 28         struct super_block *sb;
 29         int work_queued; /* non-zero if the delayed work is queued */
 30         struct delayed_work sync_work; /* FS sync delayed work */
 31         spinlock_t work_lock; /* protects sync_work and work_queued */
 32         struct mutex s_lock;
 33 };
 34 
 35 struct ufs_inode_info {
 36         union {
 37                 __fs32  i_data[15];
 38                 __u8    i_symlink[2 * 4 * 15];
 39                 __fs64  u2_i_data[15];
 40         } i_u1;
 41         __u32   i_flags;
 42         __u32   i_shadow;
 43         __u32   i_unused1;
 44         __u32   i_unused2;
 45         __u32   i_oeftflag;
 46         __u16   i_osync;
 47         __u64   i_lastfrag;
 48         seqlock_t meta_lock;
 49         struct mutex    truncate_mutex;
 50         __u32   i_dir_start_lookup;
 51         struct inode vfs_inode;
 52 };
 53 
 54 /* mount options */
 55 #define UFS_MOUNT_ONERROR               0x0000000F
 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               0x0000FFF0
 62 #define UFS_MOUNT_UFSTYPE_OLD           0x00000010
 63 #define UFS_MOUNT_UFSTYPE_44BSD         0x00000020
 64 #define UFS_MOUNT_UFSTYPE_SUN           0x00000040
 65 #define UFS_MOUNT_UFSTYPE_NEXTSTEP      0x00000080
 66 #define UFS_MOUNT_UFSTYPE_NEXTSTEP_CD   0x00000100
 67 #define UFS_MOUNT_UFSTYPE_OPENSTEP      0x00000200
 68 #define UFS_MOUNT_UFSTYPE_SUNx86        0x00000400
 69 #define UFS_MOUNT_UFSTYPE_HP            0x00000800
 70 #define UFS_MOUNT_UFSTYPE_UFS2          0x00001000
 71 #define UFS_MOUNT_UFSTYPE_SUNOS         0x00002000
 72 
 73 #define ufs_clear_opt(o,opt)    o &= ~UFS_MOUNT_##opt
 74 #define ufs_set_opt(o,opt)      o |= UFS_MOUNT_##opt
 75 #define ufs_test_opt(o,opt)     ((o) & UFS_MOUNT_##opt)
 76 
 77 /*
 78  * Debug code
 79  */
 80 #ifdef CONFIG_UFS_DEBUG
 81 #       define UFSD(f, a...)    {                                       \
 82                 pr_debug("UFSD (%s, %d): %s:",                          \
 83                         __FILE__, __LINE__, __func__);          \
 84                 pr_debug(f, ## a);                                      \
 85         }
 86 #else
 87 #       define UFSD(f, a...)    /**/
 88 #endif
 89 
 90 /* balloc.c */
 91 extern void ufs_free_fragments (struct inode *, u64, unsigned);
 92 extern void ufs_free_blocks (struct inode *, u64, unsigned);
 93 extern u64 ufs_new_fragments(struct inode *, void *, u64, u64,
 94                              unsigned, int *, struct page *);
 95 
 96 /* cylinder.c */
 97 extern struct ufs_cg_private_info * ufs_load_cylinder (struct super_block *, unsigned);
 98 extern void ufs_put_cylinder (struct super_block *, unsigned);
 99 
100 /* dir.c */
101 extern const struct inode_operations ufs_dir_inode_operations;
102 extern int ufs_add_link (struct dentry *, struct inode *);
103 extern ino_t ufs_inode_by_name(struct inode *, const struct qstr *);
104 extern int ufs_make_empty(struct inode *, struct inode *);
105 extern struct ufs_dir_entry *ufs_find_entry(struct inode *, const struct qstr *, struct page **);
106 extern int ufs_delete_entry(struct inode *, struct ufs_dir_entry *, struct page *);
107 extern int ufs_empty_dir (struct inode *);
108 extern struct ufs_dir_entry *ufs_dotdot(struct inode *, struct page **);
109 extern void ufs_set_link(struct inode *dir, struct ufs_dir_entry *de,
110                          struct page *page, struct inode *inode, bool update_times);
111 
112 /* file.c */
113 extern const struct inode_operations ufs_file_inode_operations;
114 extern const struct file_operations ufs_file_operations;
115 extern const struct address_space_operations ufs_aops;
116 
117 /* ialloc.c */
118 extern void ufs_free_inode (struct inode *inode);
119 extern struct inode * ufs_new_inode (struct inode *, umode_t);
120 
121 /* inode.c */
122 extern struct inode *ufs_iget(struct super_block *, unsigned long);
123 extern int ufs_write_inode (struct inode *, struct writeback_control *);
124 extern int ufs_sync_inode (struct inode *);
125 extern void ufs_evict_inode (struct inode *);
126 extern int ufs_setattr(struct dentry *dentry, struct iattr *attr);
127 
128 /* namei.c */
129 extern const struct file_operations ufs_dir_operations;
130 
131 /* super.c */
132 extern __printf(3, 4)
133 void ufs_warning(struct super_block *, const char *, const char *, ...);
134 extern __printf(3, 4)
135 void ufs_error(struct super_block *, const char *, const char *, ...);
136 extern __printf(3, 4)
137 void ufs_panic(struct super_block *, const char *, const char *, ...);
138 void ufs_mark_sb_dirty(struct super_block *sb);
139 
140 static inline struct ufs_sb_info *UFS_SB(struct super_block *sb)
141 {
142         return sb->s_fs_info;
143 }
144 
145 static inline struct ufs_inode_info *UFS_I(struct inode *inode)
146 {
147         return container_of(inode, struct ufs_inode_info, vfs_inode);
148 }
149 
150 /*
151  * Give cylinder group number for a file system block.
152  * Give cylinder group block number for a file system block.
153  */
154 /* #define      ufs_dtog(d)     ((d) / uspi->s_fpg) */
155 static inline u64 ufs_dtog(struct ufs_sb_private_info * uspi, u64 b)
156 {
157         do_div(b, uspi->s_fpg);
158         return b;
159 }
160 /* #define      ufs_dtogd(d)    ((d) % uspi->s_fpg) */
161 static inline u32 ufs_dtogd(struct ufs_sb_private_info * uspi, u64 b)
162 {
163         return do_div(b, uspi->s_fpg);
164 }
165 
166 #endif /* _UFS_UFS_H */
167 

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