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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/hfs/hfs_fs.h
downloadlinux-2.6.34-ux500-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'fs/hfs/hfs_fs.h')
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diff --git a/fs/hfs/hfs_fs.h b/fs/hfs/hfs_fs.h
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+/*
+ * linux/fs/hfs/hfs_fs.h
+ *
+ * Copyright (C) 1995-1997 Paul H. Hargrove
+ * (C) 2003 Ardis Technologies <roman@ardistech.com>
+ * This file may be distributed under the terms of the GNU General Public License.
+ */
+
+#ifndef _LINUX_HFS_FS_H
+#define _LINUX_HFS_FS_H
+
+#include <linux/version.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/buffer_head.h>
+#include <linux/fs.h>
+
+#include <asm/byteorder.h>
+#include <asm/uaccess.h>
+
+#include "hfs.h"
+
+#define DBG_BNODE_REFS 0x00000001
+#define DBG_BNODE_MOD 0x00000002
+#define DBG_CAT_MOD 0x00000004
+#define DBG_INODE 0x00000008
+#define DBG_SUPER 0x00000010
+#define DBG_EXTENT 0x00000020
+#define DBG_BITMAP 0x00000040
+
+//#define DBG_MASK (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD|DBG_CAT_MOD|DBG_BITMAP)
+//#define DBG_MASK (DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE)
+//#define DBG_MASK (DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT)
+#define DBG_MASK (0)
+
+#define dprint(flg, fmt, args...) \
+ if (flg & DBG_MASK) printk(fmt , ## args)
+
+#define hfs_warn(format, args...) printk(KERN_WARNING format , ## args)
+#define hfs_error(format, args...) printk(KERN_ERR format , ## args)
+
+/*
+ * struct hfs_inode_info
+ *
+ * The HFS-specific part of a Linux (struct inode)
+ */
+struct hfs_inode_info {
+ atomic_t opencnt;
+
+ unsigned int flags;
+
+ /* to deal with localtime ugliness */
+ int tz_secondswest;
+
+ struct hfs_cat_key cat_key;
+
+ struct list_head open_dir_list;
+ struct inode *rsrc_inode;
+
+ struct semaphore extents_lock;
+
+ u16 alloc_blocks, clump_blocks;
+ sector_t fs_blocks;
+ /* Allocation extents from catlog record or volume header */
+ hfs_extent_rec first_extents;
+ u16 first_blocks;
+ hfs_extent_rec cached_extents;
+ u16 cached_start, cached_blocks;
+
+ loff_t phys_size;
+ struct inode vfs_inode;
+};
+
+#define HFS_FLG_RSRC 0x0001
+#define HFS_FLG_EXT_DIRTY 0x0002
+#define HFS_FLG_EXT_NEW 0x0004
+
+#define HFS_IS_RSRC(inode) (HFS_I(inode)->flags & HFS_FLG_RSRC)
+
+/*
+ * struct hfs_sb_info
+ *
+ * The HFS-specific part of a Linux (struct super_block)
+ */
+struct hfs_sb_info {
+ struct buffer_head *mdb_bh; /* The hfs_buffer
+ holding the real
+ superblock (aka VIB
+ or MDB) */
+ struct hfs_mdb *mdb;
+ struct buffer_head *alt_mdb_bh; /* The hfs_buffer holding
+ the alternate superblock */
+ struct hfs_mdb *alt_mdb;
+ __be32 *bitmap; /* The page holding the
+ allocation bitmap */
+ struct hfs_btree *ext_tree; /* Information about
+ the extents b-tree */
+ struct hfs_btree *cat_tree; /* Information about
+ the catalog b-tree */
+ u32 file_count; /* The number of
+ regular files in
+ the filesystem */
+ u32 folder_count; /* The number of
+ directories in the
+ filesystem */
+ u32 next_id; /* The next available
+ file id number */
+ u32 clumpablks; /* The number of allocation
+ blocks to try to add when
+ extending a file */
+ u32 fs_start; /* The first 512-byte
+ block represented
+ in the bitmap */
+ u32 part_start;
+ u16 root_files; /* The number of
+ regular
+ (non-directory)
+ files in the root
+ directory */
+ u16 root_dirs; /* The number of
+ directories in the
+ root directory */
+ u16 fs_ablocks; /* The number of
+ allocation blocks
+ in the filesystem */
+ u16 free_ablocks; /* the number of unused
+ allocation blocks
+ in the filesystem */
+ u32 alloc_blksz; /* The size of an
+ "allocation block" */
+ int s_quiet; /* Silent failure when
+ changing owner or mode? */
+ __be32 s_type; /* Type for new files */
+ __be32 s_creator; /* Creator for new files */
+ umode_t s_file_umask; /* The umask applied to the
+ permissions on all files */
+ umode_t s_dir_umask; /* The umask applied to the
+ permissions on all dirs */
+ uid_t s_uid; /* The uid of all files */
+ gid_t s_gid; /* The gid of all files */
+
+ int session, part;
+
+ struct semaphore bitmap_lock;
+
+ unsigned long flags;
+
+ u16 blockoffset;
+
+ int fs_div;
+
+ struct hlist_head rsrc_inodes;
+};
+
+#define HFS_FLG_BITMAP_DIRTY 0
+#define HFS_FLG_MDB_DIRTY 1
+#define HFS_FLG_ALT_MDB_DIRTY 2
+
+/* bitmap.c */
+extern u32 hfs_vbm_search_free(struct super_block *, u32, u32 *);
+extern int hfs_clear_vbm_bits(struct super_block *, u16, u16);
+
+/* catalog.c */
+extern int hfs_cat_keycmp(const btree_key *, const btree_key *);
+struct hfs_find_data;
+extern int hfs_cat_find_brec(struct super_block *, u32, struct hfs_find_data *);
+extern int hfs_cat_create(u32, struct inode *, struct qstr *, struct inode *);
+extern int hfs_cat_delete(u32, struct inode *, struct qstr *);
+extern int hfs_cat_move(u32, struct inode *, struct qstr *,
+ struct inode *, struct qstr *);
+extern void hfs_cat_build_key(btree_key *, u32, struct qstr *);
+
+/* dir.c */
+extern struct file_operations hfs_dir_operations;
+extern struct inode_operations hfs_dir_inode_operations;
+
+/* extent.c */
+extern int hfs_ext_keycmp(const btree_key *, const btree_key *);
+extern int hfs_free_fork(struct super_block *, struct hfs_cat_file *, int);
+extern void hfs_ext_write_extent(struct inode *);
+extern int hfs_extend_file(struct inode *);
+extern void hfs_file_truncate(struct inode *);
+
+extern int hfs_get_block(struct inode *, sector_t, struct buffer_head *, int);
+
+/* inode.c */
+extern struct address_space_operations hfs_aops;
+extern struct address_space_operations hfs_btree_aops;
+
+extern struct inode *hfs_new_inode(struct inode *, struct qstr *, int);
+extern void hfs_inode_write_fork(struct inode *, struct hfs_extent *, __be32 *, __be32 *);
+extern int hfs_write_inode(struct inode *, int);
+extern int hfs_inode_setattr(struct dentry *, struct iattr *);
+extern void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext,
+ __be32 log_size, __be32 phys_size, u32 clump_size);
+extern struct inode *hfs_iget(struct super_block *, struct hfs_cat_key *, hfs_cat_rec *);
+extern void hfs_clear_inode(struct inode *);
+extern void hfs_delete_inode(struct inode *);
+
+/* attr.c */
+extern int hfs_setxattr(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags);
+extern ssize_t hfs_getxattr(struct dentry *dentry, const char *name,
+ void *value, size_t size);
+extern ssize_t hfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
+
+/* mdb.c */
+extern int hfs_mdb_get(struct super_block *);
+extern void hfs_mdb_commit(struct super_block *);
+extern void hfs_mdb_close(struct super_block *);
+extern void hfs_mdb_put(struct super_block *);
+
+/* part_tbl.c */
+extern int hfs_part_find(struct super_block *, sector_t *, sector_t *);
+
+/* string.c */
+extern struct dentry_operations hfs_dentry_operations;
+
+extern int hfs_hash_dentry(struct dentry *, struct qstr *);
+extern int hfs_strcmp(const unsigned char *, unsigned int,
+ const unsigned char *, unsigned int);
+extern int hfs_compare_dentry(struct dentry *, struct qstr *, struct qstr *);
+
+/* trans.c */
+extern void hfs_triv2mac(struct hfs_name *, struct qstr *);
+extern int hfs_mac2triv(char *, const struct hfs_name *);
+
+extern struct timezone sys_tz;
+
+/*
+ * There are two time systems. Both are based on seconds since
+ * a particular time/date.
+ * Unix: unsigned lil-endian since 00:00 GMT, Jan. 1, 1970
+ * mac: unsigned big-endian since 00:00 GMT, Jan. 1, 1904
+ *
+ */
+#define __hfs_u_to_mtime(sec) cpu_to_be32(sec + 2082844800U - sys_tz.tz_minuteswest * 60)
+#define __hfs_m_to_utime(sec) (be32_to_cpu(sec) - 2082844800U + sys_tz.tz_minuteswest * 60)
+
+#define HFS_I(inode) (list_entry(inode, struct hfs_inode_info, vfs_inode))
+#define HFS_SB(sb) ((struct hfs_sb_info *)(sb)->s_fs_info)
+
+#define hfs_m_to_utime(time) (struct timespec){ .tv_sec = __hfs_m_to_utime(time) }
+#define hfs_u_to_mtime(time) __hfs_u_to_mtime((time).tv_sec)
+#define hfs_mtime() __hfs_u_to_mtime(get_seconds())
+
+static inline const char *hfs_mdb_name(struct super_block *sb)
+{
+ return sb->s_id;
+}
+
+static inline void hfs_bitmap_dirty(struct super_block *sb)
+{
+ set_bit(HFS_FLG_BITMAP_DIRTY, &HFS_SB(sb)->flags);
+ sb->s_dirt = 1;
+}
+
+static inline void hfs_buffer_sync(struct buffer_head *bh)
+{
+ while (buffer_locked(bh)) {
+ wait_on_buffer(bh);
+ }
+ if (buffer_dirty(bh)) {
+ ll_rw_block(WRITE, 1, &bh);
+ wait_on_buffer(bh);
+ }
+}
+
+#define sb_bread512(sb, sec, data) ({ \
+ struct buffer_head *__bh; \
+ sector_t __block; \
+ loff_t __start; \
+ int __offset; \
+ \
+ __start = (loff_t)(sec) << HFS_SECTOR_SIZE_BITS;\
+ __block = __start >> (sb)->s_blocksize_bits; \
+ __offset = __start & ((sb)->s_blocksize - 1); \
+ __bh = sb_bread((sb), __block); \
+ if (likely(__bh != NULL)) \
+ data = (void *)(__bh->b_data + __offset);\
+ else \
+ data = NULL; \
+ __bh; \
+})
+
+#endif