| /* |
| * Copyright (c) 2007 Travis Geiselbrecht |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining |
| * a copy of this software and associated documentation files |
| * (the "Software"), to deal in the Software without restriction, |
| * including without limitation the rights to use, copy, modify, merge, |
| * publish, distribute, sublicense, and/or sell copies of the Software, |
| * and to permit persons to whom the Software is furnished to do so, |
| * subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be |
| * included in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| |
| #ifndef __EXT2_PRIV_H |
| #define __EXT2_PRIV_H |
| |
| #include <lib/bio.h> |
| #include <lib/bcache.h> |
| #include "ext2_fs.h" |
| |
| typedef uint32_t blocknum_t; |
| typedef uint32_t inodenum_t; |
| typedef uint32_t groupnum_t; |
| |
| typedef struct { |
| bdev_t *dev; |
| bcache_t cache; |
| |
| struct ext2_super_block sb; |
| int s_group_count; |
| struct ext2_group_desc *gd; |
| struct ext2_inode root_inode; |
| } ext2_t; |
| |
| struct cache_block { |
| blocknum_t num; |
| void *ptr; |
| }; |
| |
| /* open file handle */ |
| typedef struct { |
| ext2_t *ext2; |
| |
| struct cache_block ind_cache[3]; // cache of indirect blocks as they're scanned |
| struct ext2_inode inode; |
| } ext2_file_t; |
| |
| /* internal routines */ |
| int ext2_load_inode(ext2_t *ext2, inodenum_t num, struct ext2_inode *inode); |
| int ext2_lookup(ext2_t *ext2, const char *path, inodenum_t *inum); // path to inode |
| |
| /* io */ |
| int ext2_read_block(ext2_t *ext2, void *buf, blocknum_t bnum); |
| int ext2_get_block(ext2_t *ext2, void **ptr, blocknum_t bnum); |
| int ext2_put_block(ext2_t *ext2, blocknum_t bnum); |
| |
| off_t ext2_file_len(ext2_t *ext2, struct ext2_inode *inode); |
| int ext2_read_inode(ext2_t *ext2, struct ext2_inode *inode, void *buf, off_t offset, size_t len); |
| int ext2_read_link(ext2_t *ext2, struct ext2_inode *inode, char *str, size_t len); |
| |
| /* mode stuff */ |
| #define S_IFMT 0170000 |
| #define S_IFIFO 0010000 |
| #define S_IFCHR 0020000 |
| #define S_IFDIR 0040000 |
| #define S_IFBLK 0060000 |
| #define S_IFREG 0100000 |
| #define S_IFLNK 0120000 |
| #define S_IFSOCK 0140000 |
| |
| #define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO) |
| #define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR) |
| #define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR) |
| #define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK) |
| #define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG) |
| #define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK) |
| #define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK) |
| |
| #endif |
| |