fs/ufs/ufs.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef _UFS_UFS_H
0003 #define _UFS_UFS_H 1
0004
0005 #ifdef pr_fmt
0006 #undef pr_fmt
0007 #endif
0008
0009 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
0010
0011 #define UFS_MAX_GROUP_LOADED 8
0012 #define UFS_CGNO_EMPTY ((unsigned)-1)
0013
0014 struct ufs_sb_private_info;
0015 struct ufs_cg_private_info;
0016 struct ufs_csum;
0017
0018 struct ufs_sb_info {
0019     struct ufs_sb_private_info * s_uspi;
0020     struct ufs_csum * s_csp;
0021     unsigned s_bytesex;
0022     unsigned s_flags;
0023     struct buffer_head ** s_ucg;
0024     struct ufs_cg_private_info * s_ucpi[UFS_MAX_GROUP_LOADED];
0025     unsigned s_cgno[UFS_MAX_GROUP_LOADED];
0026     unsigned short s_cg_loaded;
0027     unsigned s_mount_opt;
0028     struct super_block *sb;
0029     int work_queued; /* non-zero if the delayed work is queued */
0030     struct delayed_work sync_work; /* FS sync delayed work */
0031     spinlock_t work_lock; /* protects sync_work and work_queued */
0032     struct mutex s_lock;
0033 };
0034
0035 struct ufs_inode_info {
0036     union {
0037         __fs32  i_data[15];
0038         __u8    i_symlink[2 * 4 * 15];
0039         __fs64  u2_i_data[15];
0040     } i_u1;
0041     __u32   i_flags;
0042     __u32   i_shadow;
0043     __u32   i_unused1;
0044     __u32   i_unused2;
0045     __u32   i_oeftflag;
0046     __u16   i_osync;
0047     __u64   i_lastfrag;
0048     seqlock_t meta_lock;
0049     struct mutex    truncate_mutex;
0050     __u32   i_dir_start_lookup;
0051     struct inode vfs_inode;
0052 };
0053
0054 /* mount options */
0055 #define UFS_MOUNT_ONERROR       0x0000000F
0056 #define UFS_MOUNT_ONERROR_PANIC     0x00000001
0057 #define UFS_MOUNT_ONERROR_LOCK      0x00000002
0058 #define UFS_MOUNT_ONERROR_UMOUNT    0x00000004
0059 #define UFS_MOUNT_ONERROR_REPAIR    0x00000008
0060
0061 #define UFS_MOUNT_UFSTYPE       0x0000FFF0
0062 #define UFS_MOUNT_UFSTYPE_OLD       0x00000010
0063 #define UFS_MOUNT_UFSTYPE_44BSD     0x00000020
0064 #define UFS_MOUNT_UFSTYPE_SUN       0x00000040
0065 #define UFS_MOUNT_UFSTYPE_NEXTSTEP  0x00000080
0066 #define UFS_MOUNT_UFSTYPE_NEXTSTEP_CD   0x00000100
0067 #define UFS_MOUNT_UFSTYPE_OPENSTEP  0x00000200
0068 #define UFS_MOUNT_UFSTYPE_SUNx86    0x00000400
0069 #define UFS_MOUNT_UFSTYPE_HP            0x00000800
0070 #define UFS_MOUNT_UFSTYPE_UFS2      0x00001000
0071 #define UFS_MOUNT_UFSTYPE_SUNOS     0x00002000
0072
0073 #define ufs_clear_opt(o,opt)    o &= ~UFS_MOUNT_##opt
0074 #define ufs_set_opt(o,opt)  o |= UFS_MOUNT_##opt
0075 #define ufs_test_opt(o,opt) ((o) & UFS_MOUNT_##opt)
0076
0077 /*
0078  * Debug code
0079  */
0080 #ifdef CONFIG_UFS_DEBUG
0081 #   define UFSD(f, a...)    {                   \
0082         pr_debug("UFSD (%s, %d): %s:",              \
0083             __FILE__, __LINE__, __func__);      \
0084         pr_debug(f, ## a);                  \
0085     }
0086 #else
0087 #   define UFSD(f, a...)    /**/
0088 #endif
0089
0090 /* balloc.c */
0091 extern void ufs_free_fragments (struct inode *, u64, unsigned);
0092 extern void ufs_free_blocks (struct inode *, u64, unsigned);
0093 extern u64 ufs_new_fragments(struct inode *, void *, u64, u64,
0094                  unsigned, int *, struct page *);
0095
0096 /* cylinder.c */
0097 extern struct ufs_cg_private_info * ufs_load_cylinder (struct super_block *, unsigned);
0098 extern void ufs_put_cylinder (struct super_block *, unsigned);
0099
0100 /* dir.c */
0101 extern const struct inode_operations ufs_dir_inode_operations;
0102 extern int ufs_add_link (struct dentry *, struct inode *);
0103 extern ino_t ufs_inode_by_name(struct inode *, const struct qstr *);
0104 extern int ufs_make_empty(struct inode *, struct inode *);
0105 extern struct ufs_dir_entry *ufs_find_entry(struct inode *, const struct qstr *, struct page **);
0106 extern int ufs_delete_entry(struct inode *, struct ufs_dir_entry *, struct page *);
0107 extern int ufs_empty_dir (struct inode *);
0108 extern struct ufs_dir_entry *ufs_dotdot(struct inode *, struct page **);
0109 extern void ufs_set_link(struct inode *dir, struct ufs_dir_entry *de,
0110              struct page *page, struct inode *inode, bool update_times);
0111
0112 /* file.c */
0113 extern const struct inode_operations ufs_file_inode_operations;
0114 extern const struct file_operations ufs_file_operations;
0115 extern const struct address_space_operations ufs_aops;
0116
0117 /* ialloc.c */
0118 extern void ufs_free_inode (struct inode *inode);
0119 extern struct inode * ufs_new_inode (struct inode *, umode_t);
0120
0121 /* inode.c */
0122 extern struct inode *ufs_iget(struct super_block *, unsigned long);
0123 extern int ufs_write_inode (struct inode *, struct writeback_control *);
0124 extern int ufs_sync_inode (struct inode *);
0125 extern void ufs_evict_inode (struct inode *);
0126 extern int ufs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
0127                struct iattr *attr);
0128
0129 /* namei.c */
0130 extern const struct file_operations ufs_dir_operations;
0131
0132 /* super.c */
0133 extern __printf(3, 4)
0134 void ufs_warning(struct super_block *, const char *, const char *, ...);
0135 extern __printf(3, 4)
0136 void ufs_error(struct super_block *, const char *, const char *, ...);
0137 extern __printf(3, 4)
0138 void ufs_panic(struct super_block *, const char *, const char *, ...);
0139 void ufs_mark_sb_dirty(struct super_block *sb);
0140
0141 static inline struct ufs_sb_info *UFS_SB(struct super_block *sb)
0142 {
0143     return sb->s_fs_info;
0144 }
0145
0146 static inline struct ufs_inode_info *UFS_I(struct inode *inode)
0147 {
0148     return container_of(inode, struct ufs_inode_info, vfs_inode);
0149 }
0150
0151 /*
0152  * Give cylinder group number for a file system block.
0153  * Give cylinder group block number for a file system block.
0154  */
0155 /* #define  ufs_dtog(d) ((d) / uspi->s_fpg) */
0156 static inline u64 ufs_dtog(struct ufs_sb_private_info * uspi, u64 b)
0157 {
0158     do_div(b, uspi->s_fpg);
0159     return b;
0160 }
0161 /* #define  ufs_dtogd(d)    ((d) % uspi->s_fpg) */
0162 static inline u32 ufs_dtogd(struct ufs_sb_private_info * uspi, u64 b)
0163 {
0164     return do_div(b, uspi->s_fpg);
0165 }
0166
0167 #endif /* _UFS_UFS_H */