121 lines
3.0 KiB
C
121 lines
3.0 KiB
C
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/*
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* Copyright (C) 2006 Apple Computer, Inc. All rights reserved.
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*
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* This document is the property of Apple Computer, Inc.
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* It is considered confidential and proprietary.
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*
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* This document may not be reproduced or transmitted in any form,
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* in whole or in part, without the express written permission of
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* Apple Computer, Inc.
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*/
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#ifndef __LIB_FS_H
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#define __LIB_FS_H
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#include <list.h>
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#include <sys/types.h>
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__BEGIN_DECLS
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/* limits */
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#define FS_MAXNAMLEN 255 /* maximum component name */
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#define FS_MAXPATHLEN 512 /* maximum path length */
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/* statfs structure. */
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struct statfs {
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uint32_t f_bsize; /* Size of a cluster in bytes. */
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uint32_t f_blocks; /* Number of clusters. */
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uint32_t f_bfree; /* Number of free clusters. */
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};
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enum file_type {
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FILE_TYPE_UNKNOWN = 0,
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FILE_TYPE_FILE,
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FILE_TYPE_DIR,
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};
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/* directory entry. */
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struct dirent {
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uint32_t d_fileno;
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uint32_t d_reclen;
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uint8_t d_type;
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uint8_t d_namlen;
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char d_name[FS_MAXNAMLEN + 1];
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int32_t d_ctime;
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int32_t d_atime;
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int32_t d_mtime;
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};
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/* stat structure. */
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struct stat {
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uint32_t st_ino; /* Inode number. */
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uint32_t st_size; /* Lenght of file (bytes). */
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uint32_t st_blocks; /* Length of file (blocks). */
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enum file_type st_type;
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uint32_t st_flags;
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int32_t st_ctime; /* Creation time. */
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int32_t st_mtime; /* Modification time. */
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int32_t st_atime; /* Access time. */
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};
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/* File I/O */
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#define FILE_SEEK_SET 0
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#define FILE_SEEK_CUR 1
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#define FILE_SEEK_END 2
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/* read only fs ops */
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struct fs_ops {
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int (*mount)(void **ctxt, const char *dev);
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void (*unmount)(void *ctxt);
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int (*fsstat)(void *ctxt, struct statfs *stat);
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void *(*open)(void *ctxt, const char *path, uint8_t flags);
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int (*read)(void *filectxt, void *buf, size_t len);
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int (*fstat)(void *filectxt, struct stat *st);
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off_t (*seek)(void *filectxt, off_t offset, int whence);
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void (*close)(void *filectxt);
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void *(*opendir)(void *ctxt, const char *path);
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int (*readdir)(void *dirctxt, struct dirent *ent);
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void (*rewinddir)(void *dirctxt);
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void (*closedir)(void *dirctxt);
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};
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struct fs_struct {
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const char *name;
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const struct fs_ops *ops;
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};
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/* user fs api */
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int fs_mount(const char *dev, const char *fs_name, const char *mountpoint);
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void fs_unmount(const char *dev);
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int fs_fsstat(void *fscookie, struct statfs *stat);
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int fs_open(const char *path, uint8_t flags);
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int fs_read(int handle, void *buf, size_t len);
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int fs_stat(int handle, struct stat *st);
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off_t fs_seek(int handle, off_t offset, int whence);
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int fs_close(int handle);
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int fs_opendir(const char *path);
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int fs_readdir(int handle, struct dirent *ent);
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int fs_rewinddir(int handle);
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int fs_closedir(int handle);
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const char *fs_get_fsname(const int index);
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/* some debug routines */
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void fs_stat_dump(const struct stat *st);
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void fs_statfs_dump(const struct statfs *st);
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int fs_dump_dir(const char *dirpath, bool recurse);
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void fs_dump_mounts(void);
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/* convenience routines */
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int fs_load_file(const char *path, addr_t addr, size_t *maxsize);
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__END_DECLS
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#endif
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