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306 lines
9.3 KiB
306 lines
9.3 KiB
/* |
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* linux/fs/hfs/hfs_fs.h |
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* |
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* Copyright (C) 1995-1997 Paul H. Hargrove |
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* (C) 2003 Ardis Technologies <[email protected]> |
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* This file may be distributed under the terms of the GNU General Public License. |
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*/ |
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#ifndef _LINUX_HFS_FS_H |
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#define _LINUX_HFS_FS_H |
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#ifdef pr_fmt |
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#undef pr_fmt |
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#endif |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/slab.h> |
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#include <linux/types.h> |
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#include <linux/mutex.h> |
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#include <linux/buffer_head.h> |
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#include <linux/fs.h> |
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#include <linux/workqueue.h> |
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#include <asm/byteorder.h> |
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#include <linux/uaccess.h> |
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#include "hfs.h" |
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#define DBG_BNODE_REFS 0x00000001 |
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#define DBG_BNODE_MOD 0x00000002 |
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#define DBG_CAT_MOD 0x00000004 |
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#define DBG_INODE 0x00000008 |
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#define DBG_SUPER 0x00000010 |
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#define DBG_EXTENT 0x00000020 |
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#define DBG_BITMAP 0x00000040 |
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//#define DBG_MASK (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD|DBG_CAT_MOD|DBG_BITMAP) |
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//#define DBG_MASK (DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE) |
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//#define DBG_MASK (DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT) |
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#define DBG_MASK (0) |
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#define hfs_dbg(flg, fmt, ...) \ |
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do { \ |
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if (DBG_##flg & DBG_MASK) \ |
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printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \ |
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} while (0) |
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#define hfs_dbg_cont(flg, fmt, ...) \ |
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do { \ |
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if (DBG_##flg & DBG_MASK) \ |
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pr_cont(fmt, ##__VA_ARGS__); \ |
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} while (0) |
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/* |
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* struct hfs_inode_info |
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* |
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* The HFS-specific part of a Linux (struct inode) |
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*/ |
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struct hfs_inode_info { |
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atomic_t opencnt; |
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unsigned int flags; |
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/* to deal with localtime ugliness */ |
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int tz_secondswest; |
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struct hfs_cat_key cat_key; |
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struct list_head open_dir_list; |
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spinlock_t open_dir_lock; |
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struct inode *rsrc_inode; |
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struct mutex extents_lock; |
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u16 alloc_blocks, clump_blocks; |
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sector_t fs_blocks; |
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/* Allocation extents from catlog record or volume header */ |
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hfs_extent_rec first_extents; |
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u16 first_blocks; |
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hfs_extent_rec cached_extents; |
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u16 cached_start, cached_blocks; |
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loff_t phys_size; |
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struct inode vfs_inode; |
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}; |
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#define HFS_FLG_RSRC 0x0001 |
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#define HFS_FLG_EXT_DIRTY 0x0002 |
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#define HFS_FLG_EXT_NEW 0x0004 |
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#define HFS_IS_RSRC(inode) (HFS_I(inode)->flags & HFS_FLG_RSRC) |
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/* |
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* struct hfs_sb_info |
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* |
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* The HFS-specific part of a Linux (struct super_block) |
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*/ |
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struct hfs_sb_info { |
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struct buffer_head *mdb_bh; /* The hfs_buffer |
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holding the real |
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superblock (aka VIB |
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or MDB) */ |
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struct hfs_mdb *mdb; |
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struct buffer_head *alt_mdb_bh; /* The hfs_buffer holding |
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the alternate superblock */ |
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struct hfs_mdb *alt_mdb; |
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__be32 *bitmap; /* The page holding the |
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allocation bitmap */ |
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struct hfs_btree *ext_tree; /* Information about |
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the extents b-tree */ |
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struct hfs_btree *cat_tree; /* Information about |
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the catalog b-tree */ |
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u32 file_count; /* The number of |
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regular files in |
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the filesystem */ |
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u32 folder_count; /* The number of |
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directories in the |
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filesystem */ |
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u32 next_id; /* The next available |
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file id number */ |
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u32 clumpablks; /* The number of allocation |
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blocks to try to add when |
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extending a file */ |
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u32 fs_start; /* The first 512-byte |
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block represented |
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in the bitmap */ |
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u32 part_start; |
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u16 root_files; /* The number of |
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regular |
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(non-directory) |
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files in the root |
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directory */ |
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u16 root_dirs; /* The number of |
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directories in the |
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root directory */ |
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u16 fs_ablocks; /* The number of |
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allocation blocks |
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in the filesystem */ |
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u16 free_ablocks; /* the number of unused |
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allocation blocks |
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in the filesystem */ |
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u32 alloc_blksz; /* The size of an |
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"allocation block" */ |
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int s_quiet; /* Silent failure when |
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changing owner or mode? */ |
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__be32 s_type; /* Type for new files */ |
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__be32 s_creator; /* Creator for new files */ |
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umode_t s_file_umask; /* The umask applied to the |
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permissions on all files */ |
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umode_t s_dir_umask; /* The umask applied to the |
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permissions on all dirs */ |
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kuid_t s_uid; /* The uid of all files */ |
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kgid_t s_gid; /* The gid of all files */ |
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int session, part; |
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struct nls_table *nls_io, *nls_disk; |
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struct mutex bitmap_lock; |
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unsigned long flags; |
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u16 blockoffset; |
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int fs_div; |
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struct super_block *sb; |
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int work_queued; /* non-zero delayed work is queued */ |
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struct delayed_work mdb_work; /* MDB flush delayed work */ |
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spinlock_t work_lock; /* protects mdb_work and work_queued */ |
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}; |
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#define HFS_FLG_BITMAP_DIRTY 0 |
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#define HFS_FLG_MDB_DIRTY 1 |
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#define HFS_FLG_ALT_MDB_DIRTY 2 |
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/* bitmap.c */ |
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extern u32 hfs_vbm_search_free(struct super_block *, u32, u32 *); |
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extern int hfs_clear_vbm_bits(struct super_block *, u16, u16); |
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/* catalog.c */ |
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extern int hfs_cat_keycmp(const btree_key *, const btree_key *); |
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struct hfs_find_data; |
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extern int hfs_cat_find_brec(struct super_block *, u32, struct hfs_find_data *); |
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extern int hfs_cat_create(u32, struct inode *, const struct qstr *, struct inode *); |
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extern int hfs_cat_delete(u32, struct inode *, const struct qstr *); |
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extern int hfs_cat_move(u32, struct inode *, const struct qstr *, |
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struct inode *, const struct qstr *); |
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extern void hfs_cat_build_key(struct super_block *, btree_key *, u32, const struct qstr *); |
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/* dir.c */ |
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extern const struct file_operations hfs_dir_operations; |
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extern const struct inode_operations hfs_dir_inode_operations; |
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/* extent.c */ |
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extern int hfs_ext_keycmp(const btree_key *, const btree_key *); |
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extern int hfs_free_fork(struct super_block *, struct hfs_cat_file *, int); |
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extern int hfs_ext_write_extent(struct inode *); |
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extern int hfs_extend_file(struct inode *); |
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extern void hfs_file_truncate(struct inode *); |
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extern int hfs_get_block(struct inode *, sector_t, struct buffer_head *, int); |
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/* inode.c */ |
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extern const struct address_space_operations hfs_aops; |
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extern const struct address_space_operations hfs_btree_aops; |
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int hfs_write_begin(struct file *file, struct address_space *mapping, |
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loff_t pos, unsigned len, struct page **pagep, void **fsdata); |
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extern struct inode *hfs_new_inode(struct inode *, const struct qstr *, umode_t); |
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extern void hfs_inode_write_fork(struct inode *, struct hfs_extent *, __be32 *, __be32 *); |
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extern int hfs_write_inode(struct inode *, struct writeback_control *); |
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extern int hfs_inode_setattr(struct user_namespace *, struct dentry *, |
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struct iattr *); |
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extern void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext, |
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__be32 log_size, __be32 phys_size, u32 clump_size); |
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extern struct inode *hfs_iget(struct super_block *, struct hfs_cat_key *, hfs_cat_rec *); |
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extern void hfs_evict_inode(struct inode *); |
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extern void hfs_delete_inode(struct inode *); |
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/* attr.c */ |
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extern const struct xattr_handler *hfs_xattr_handlers[]; |
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/* mdb.c */ |
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extern int hfs_mdb_get(struct super_block *); |
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extern void hfs_mdb_commit(struct super_block *); |
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extern void hfs_mdb_close(struct super_block *); |
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extern void hfs_mdb_put(struct super_block *); |
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/* part_tbl.c */ |
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extern int hfs_part_find(struct super_block *, sector_t *, sector_t *); |
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/* string.c */ |
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extern const struct dentry_operations hfs_dentry_operations; |
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extern int hfs_hash_dentry(const struct dentry *, struct qstr *); |
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extern int hfs_strcmp(const unsigned char *, unsigned int, |
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const unsigned char *, unsigned int); |
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extern int hfs_compare_dentry(const struct dentry *dentry, |
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unsigned int len, const char *str, const struct qstr *name); |
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/* trans.c */ |
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extern void hfs_asc2mac(struct super_block *, struct hfs_name *, const struct qstr *); |
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extern int hfs_mac2asc(struct super_block *, char *, const struct hfs_name *); |
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/* super.c */ |
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extern void hfs_mark_mdb_dirty(struct super_block *sb); |
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/* |
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* There are two time systems. Both are based on seconds since |
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* a particular time/date. |
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* Unix: signed little-endian since 00:00 GMT, Jan. 1, 1970 |
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* mac: unsigned big-endian since 00:00 GMT, Jan. 1, 1904 |
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* |
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* HFS implementations are highly inconsistent, this one matches the |
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* traditional behavior of 64-bit Linux, giving the most useful |
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* time range between 1970 and 2106, by treating any on-disk timestamp |
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* under HFS_UTC_OFFSET (Jan 1 1970) as a time between 2040 and 2106. |
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*/ |
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#define HFS_UTC_OFFSET 2082844800U |
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static inline time64_t __hfs_m_to_utime(__be32 mt) |
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{ |
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time64_t ut = (u32)(be32_to_cpu(mt) - HFS_UTC_OFFSET); |
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return ut + sys_tz.tz_minuteswest * 60; |
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} |
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static inline __be32 __hfs_u_to_mtime(time64_t ut) |
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{ |
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ut -= sys_tz.tz_minuteswest * 60; |
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return cpu_to_be32(lower_32_bits(ut) + HFS_UTC_OFFSET); |
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} |
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#define HFS_I(inode) (container_of(inode, struct hfs_inode_info, vfs_inode)) |
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#define HFS_SB(sb) ((struct hfs_sb_info *)(sb)->s_fs_info) |
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#define hfs_m_to_utime(time) (struct timespec64){ .tv_sec = __hfs_m_to_utime(time) } |
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#define hfs_u_to_mtime(time) __hfs_u_to_mtime((time).tv_sec) |
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#define hfs_mtime() __hfs_u_to_mtime(ktime_get_real_seconds()) |
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static inline const char *hfs_mdb_name(struct super_block *sb) |
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{ |
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return sb->s_id; |
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} |
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static inline void hfs_bitmap_dirty(struct super_block *sb) |
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{ |
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set_bit(HFS_FLG_BITMAP_DIRTY, &HFS_SB(sb)->flags); |
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hfs_mark_mdb_dirty(sb); |
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} |
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#define sb_bread512(sb, sec, data) ({ \ |
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struct buffer_head *__bh; \ |
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sector_t __block; \ |
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loff_t __start; \ |
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int __offset; \ |
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\ |
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__start = (loff_t)(sec) << HFS_SECTOR_SIZE_BITS;\ |
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__block = __start >> (sb)->s_blocksize_bits; \ |
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__offset = __start & ((sb)->s_blocksize - 1); \ |
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__bh = sb_bread((sb), __block); \ |
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if (likely(__bh != NULL)) \ |
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data = (void *)(__bh->b_data + __offset);\ |
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else \ |
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data = NULL; \ |
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__bh; \ |
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}) |
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#endif
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