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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/hfs/hfs_fs.h | |
download | lwn-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz lwn-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
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')
-rw-r--r-- | fs/hfs/hfs_fs.h | 286 |
1 files changed, 286 insertions, 0 deletions
diff --git a/fs/hfs/hfs_fs.h b/fs/hfs/hfs_fs.h new file mode 100644 index 000000000000..0dc8ef8e14de --- /dev/null +++ b/fs/hfs/hfs_fs.h @@ -0,0 +1,286 @@ +/* + * 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 |