Initial import

1 files changed, 314 insertions, 0 deletions

diff --git a/fs/affs/affs.h b/fs/affs/affs.h
new file mode 100644
index 000000000..cffe8370f
--- /dev/null
+++ b/fs/affs/affs.h
@@ -0,0 +1,314 @@
+#ifdef pr_fmt
+#undef pr_fmt
+#endif
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/types.h>
+#include <linux/fs.h>
+#include <linux/buffer_head.h>
+#include <linux/amigaffs.h>
+#include <linux/mutex.h>
+#include <linux/workqueue.h>
+
+/* Ugly macros make the code more pretty. */
+
+#define GET_END_PTR(st,p,sz)		 ((st *)((char *)(p)+((sz)-sizeof(st))))
+#define AFFS_GET_HASHENTRY(data,hashkey) be32_to_cpu(((struct dir_front *)data)->hashtable[hashkey])
+#define AFFS_BLOCK(sb, bh, blk)		(AFFS_HEAD(bh)->table[AFFS_SB(sb)->s_hashsize-1-(blk)])
+
+#define AFFS_HEAD(bh)		((struct affs_head *)(bh)->b_data)
+#define AFFS_TAIL(sb, bh)	((struct affs_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_tail)))
+#define AFFS_ROOT_HEAD(bh)	((struct affs_root_head *)(bh)->b_data)
+#define AFFS_ROOT_TAIL(sb, bh)	((struct affs_root_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_root_tail)))
+#define AFFS_DATA_HEAD(bh)	((struct affs_data_head *)(bh)->b_data)
+#define AFFS_DATA(bh)		(((struct affs_data_head *)(bh)->b_data)->data)
+
+#define AFFS_CACHE_SIZE		PAGE_SIZE
+
+#define AFFS_LC_SIZE		(AFFS_CACHE_SIZE/sizeof(u32)/2)
+#define AFFS_AC_SIZE		(AFFS_CACHE_SIZE/sizeof(struct affs_ext_key)/2)
+#define AFFS_AC_MASK		(AFFS_AC_SIZE-1)
+
+#define AFFSNAMEMAX 30U
+
+struct affs_ext_key {
+	u32	ext;				/* idx of the extended block */
+	u32	key;				/* block number */
+};
+
+/*
+ * affs fs inode data in memory
+ */
+struct affs_inode_info {
+	atomic_t i_opencnt;
+	struct semaphore i_link_lock;		/* Protects internal inode access. */
+	struct semaphore i_ext_lock;		/* Protects internal inode access. */
+#define i_hash_lock i_ext_lock
+	u32	 i_blkcnt;			/* block count */
+	u32	 i_extcnt;			/* extended block count */
+	u32	*i_lc;				/* linear cache of extended blocks */
+	u32	 i_lc_size;
+	u32	 i_lc_shift;
+	u32	 i_lc_mask;
+	struct affs_ext_key *i_ac;		/* associative cache of extended blocks */
+	u32	 i_ext_last;			/* last accessed extended block */
+	struct buffer_head *i_ext_bh;		/* bh of last extended block */
+	loff_t	 mmu_private;
+	u32	 i_protect;			/* unused attribute bits */
+	u32	 i_lastalloc;			/* last allocated block */
+	int	 i_pa_cnt;			/* number of preallocated blocks */
+	struct inode vfs_inode;
+};
+
+/* short cut to get to the affs specific inode data */
+static inline struct affs_inode_info *AFFS_I(struct inode *inode)
+{
+	return list_entry(inode, struct affs_inode_info, vfs_inode);
+}
+
+/*
+ * super-block data in memory
+ *
+ * Block numbers are adjusted for their actual size
+ *
+ */
+
+struct affs_bm_info {
+	u32 bm_key;			/* Disk block number */
+	u32 bm_free;			/* Free blocks in here */
+};
+
+struct affs_sb_info {
+	int s_partition_size;		/* Partition size in blocks. */
+	int s_reserved;			/* Number of reserved blocks. */
+	//u32 s_blksize;			/* Initial device blksize */
+	u32 s_data_blksize;		/* size of the data block w/o header */
+	u32 s_root_block;		/* FFS root block number. */
+	int s_hashsize;			/* Size of hash table. */
+	unsigned long s_flags;		/* See below. */
+	kuid_t s_uid;			/* uid to override */
+	kgid_t s_gid;			/* gid to override */
+	umode_t s_mode;			/* mode to override */
+	struct buffer_head *s_root_bh;	/* Cached root block. */
+	struct mutex s_bmlock;		/* Protects bitmap access. */
+	struct affs_bm_info *s_bitmap;	/* Bitmap infos. */
+	u32 s_bmap_count;		/* # of bitmap blocks. */
+	u32 s_bmap_bits;		/* # of bits in one bitmap blocks */
+	u32 s_last_bmap;
+	struct buffer_head *s_bmap_bh;
+	char *s_prefix;			/* Prefix for volumes and assigns. */
+	char s_volume[32];		/* Volume prefix for absolute symlinks. */
+	spinlock_t symlink_lock;	/* protects the previous two */
+	struct super_block *sb;		/* the VFS superblock object */
+	int work_queued;		/* non-zero delayed work is queued */
+	struct delayed_work sb_work;	/* superblock flush delayed work */
+	spinlock_t work_lock;		/* protects sb_work and work_queued */
+};
+
+#define AFFS_MOUNT_SF_INTL		0x0001 /* International filesystem. */
+#define AFFS_MOUNT_SF_BM_VALID		0x0002 /* Bitmap is valid. */
+#define AFFS_MOUNT_SF_IMMUTABLE		0x0004 /* Protection bits cannot be changed */
+#define AFFS_MOUNT_SF_QUIET		0x0008 /* chmod errors will be not reported */
+#define AFFS_MOUNT_SF_SETUID		0x0010 /* Ignore Amiga uid */
+#define AFFS_MOUNT_SF_SETGID		0x0020 /* Ignore Amiga gid */
+#define AFFS_MOUNT_SF_SETMODE		0x0040 /* Ignore Amiga protection bits */
+#define AFFS_MOUNT_SF_MUFS		0x0100 /* Use MUFS uid/gid mapping */
+#define AFFS_MOUNT_SF_OFS		0x0200 /* Old filesystem */
+#define AFFS_MOUNT_SF_PREFIX		0x0400 /* Buffer for prefix is allocated */
+#define AFFS_MOUNT_SF_VERBOSE		0x0800 /* Talk about fs when mounting */
+#define AFFS_MOUNT_SF_NO_TRUNCATE	0x1000 /* Don't truncate filenames */
+
+#define affs_clear_opt(o, opt)    (o &= ~AFFS_MOUNT_##opt)
+#define affs_set_opt(o, opt)      (o |= AFFS_MOUNT_##opt)
+#define affs_test_opt(o, opt)     ((o) & AFFS_MOUNT_##opt)
+
+/* short cut to get to the affs specific sb data */
+static inline struct affs_sb_info *AFFS_SB(struct super_block *sb)
+{
+	return sb->s_fs_info;
+}
+
+void affs_mark_sb_dirty(struct super_block *sb);
+
+/* amigaffs.c */
+
+extern int	affs_insert_hash(struct inode *inode, struct buffer_head *bh);
+extern int	affs_remove_hash(struct inode *dir, struct buffer_head *rem_bh);
+extern int	affs_remove_header(struct dentry *dentry);
+extern u32	affs_checksum_block(struct super_block *sb, struct buffer_head *bh);
+extern void	affs_fix_checksum(struct super_block *sb, struct buffer_head *bh);
+extern void	secs_to_datestamp(time_t secs, struct affs_date *ds);
+extern umode_t	prot_to_mode(u32 prot);
+extern void	mode_to_prot(struct inode *inode);
+__printf(3, 4)
+extern void	affs_error(struct super_block *sb, const char *function,
+			   const char *fmt, ...);
+__printf(3, 4)
+extern void	affs_warning(struct super_block *sb, const char *function,
+			     const char *fmt, ...);
+extern bool	affs_nofilenametruncate(const struct dentry *dentry);
+extern int	affs_check_name(const unsigned char *name, int len,
+				bool notruncate);
+extern int	affs_copy_name(unsigned char *bstr, struct dentry *dentry);
+
+/* bitmap. c */
+
+extern u32	affs_count_free_blocks(struct super_block *s);
+extern void	affs_free_block(struct super_block *sb, u32 block);
+extern u32	affs_alloc_block(struct inode *inode, u32 goal);
+extern int	affs_init_bitmap(struct super_block *sb, int *flags);
+extern void	affs_free_bitmap(struct super_block *sb);
+
+/* namei.c */
+
+extern int	affs_hash_name(struct super_block *sb, const u8 *name, unsigned int len);
+extern struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry, unsigned int);
+extern int	affs_unlink(struct inode *dir, struct dentry *dentry);
+extern int	affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool);
+extern int	affs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode);
+extern int	affs_rmdir(struct inode *dir, struct dentry *dentry);
+extern int	affs_link(struct dentry *olddentry, struct inode *dir,
+			  struct dentry *dentry);
+extern int	affs_symlink(struct inode *dir, struct dentry *dentry,
+			     const char *symname);
+extern int	affs_rename(struct inode *old_dir, struct dentry *old_dentry,
+			    struct inode *new_dir, struct dentry *new_dentry);
+
+/* inode.c */
+
+extern unsigned long		 affs_parent_ino(struct inode *dir);
+extern struct inode		*affs_new_inode(struct inode *dir);
+extern int			 affs_notify_change(struct dentry *dentry, struct iattr *attr);
+extern void			 affs_evict_inode(struct inode *inode);
+extern struct inode		*affs_iget(struct super_block *sb,
+					unsigned long ino);
+extern int			 affs_write_inode(struct inode *inode,
+					struct writeback_control *wbc);
+extern int			 affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s32 type);
+
+/* file.c */
+
+void		affs_free_prealloc(struct inode *inode);
+extern void	affs_truncate(struct inode *);
+int		affs_file_fsync(struct file *, loff_t, loff_t, int);
+
+/* dir.c */
+
+extern void   affs_dir_truncate(struct inode *);
+
+/* jump tables */
+
+extern const struct inode_operations	 affs_file_inode_operations;
+extern const struct inode_operations	 affs_dir_inode_operations;
+extern const struct inode_operations   affs_symlink_inode_operations;
+extern const struct file_operations	 affs_file_operations;
+extern const struct file_operations	 affs_file_operations_ofs;
+extern const struct file_operations	 affs_dir_operations;
+extern const struct address_space_operations	 affs_symlink_aops;
+extern const struct address_space_operations	 affs_aops;
+extern const struct address_space_operations	 affs_aops_ofs;
+
+extern const struct dentry_operations	 affs_dentry_operations;
+extern const struct dentry_operations	 affs_intl_dentry_operations;
+
+static inline void
+affs_set_blocksize(struct super_block *sb, int size)
+{
+	sb_set_blocksize(sb, size);
+}
+static inline struct buffer_head *
+affs_bread(struct super_block *sb, int block)
+{
+	pr_debug("%s: %d\n", __func__, block);
+	if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size)
+		return sb_bread(sb, block);
+	return NULL;
+}
+static inline struct buffer_head *
+affs_getblk(struct super_block *sb, int block)
+{
+	pr_debug("%s: %d\n", __func__, block);
+	if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size)
+		return sb_getblk(sb, block);
+	return NULL;
+}
+static inline struct buffer_head *
+affs_getzeroblk(struct super_block *sb, int block)
+{
+	struct buffer_head *bh;
+	pr_debug("%s: %d\n", __func__, block);
+	if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) {
+		bh = sb_getblk(sb, block);
+		lock_buffer(bh);
+		memset(bh->b_data, 0 , sb->s_blocksize);
+		set_buffer_uptodate(bh);
+		unlock_buffer(bh);
+		return bh;
+	}
+	return NULL;
+}
+static inline struct buffer_head *
+affs_getemptyblk(struct super_block *sb, int block)
+{
+	struct buffer_head *bh;
+	pr_debug("%s: %d\n", __func__, block);
+	if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) {
+		bh = sb_getblk(sb, block);
+		wait_on_buffer(bh);
+		set_buffer_uptodate(bh);
+		return bh;
+	}
+	return NULL;
+}
+static inline void
+affs_brelse(struct buffer_head *bh)
+{
+	if (bh)
+		pr_debug("%s: %lld\n", __func__, (long long) bh->b_blocknr);
+	brelse(bh);
+}
+
+static inline void
+affs_adjust_checksum(struct buffer_head *bh, u32 val)
+{
+	u32 tmp = be32_to_cpu(((__be32 *)bh->b_data)[5]);
+	((__be32 *)bh->b_data)[5] = cpu_to_be32(tmp - val);
+}
+static inline void
+affs_adjust_bitmapchecksum(struct buffer_head *bh, u32 val)
+{
+	u32 tmp = be32_to_cpu(((__be32 *)bh->b_data)[0]);
+	((__be32 *)bh->b_data)[0] = cpu_to_be32(tmp - val);
+}
+
+static inline void
+affs_lock_link(struct inode *inode)
+{
+	down(&AFFS_I(inode)->i_link_lock);
+}
+static inline void
+affs_unlock_link(struct inode *inode)
+{
+	up(&AFFS_I(inode)->i_link_lock);
+}
+static inline void
+affs_lock_dir(struct inode *inode)
+{
+	down(&AFFS_I(inode)->i_hash_lock);
+}
+static inline void
+affs_unlock_dir(struct inode *inode)
+{
+	up(&AFFS_I(inode)->i_hash_lock);
+}
+static inline void
+affs_lock_ext(struct inode *inode)
+{
+	down(&AFFS_I(inode)->i_ext_lock);
+}
+static inline void
+affs_unlock_ext(struct inode *inode)
+{
+	up(&AFFS_I(inode)->i_ext_lock);
+}