- Fix for possible unset uid/gid in toproto - Fix for default mtree style - Update libelf - Importing libexecinfo - Resynchronize GCC, mpc, gmp, mpfr - build.sh: Replace params with show-params. This has been done as the make target has been renamed in the same way, while a new target named params has been added. This new target generates a file containing all the parameters, instead of printing it on the console. - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org) get getservbyport() out of the inner loop Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
1046 lines
27 KiB
C
1046 lines
27 KiB
C
/* $NetBSD: ext2fs.c,v 1.19 2013/10/20 17:17:30 christos Exp $ */
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/*
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* Copyright (c) 1997 Manuel Bouyer.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* The Mach Operating System project at Carnegie-Mellon University.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*
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* Copyright (c) 1990, 1991 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Author: David Golub
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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/*
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* Stand-alone file reading package for Ext2 file system.
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*/
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/* #define EXT2FS_DEBUG */
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#include <sys/param.h>
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#include <sys/time.h>
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#include <ufs/ext2fs/ext2fs_dinode.h>
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#include <ufs/ext2fs/ext2fs_dir.h>
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#include <ufs/ext2fs/ext2fs.h>
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#ifdef _STANDALONE
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#include <lib/libkern/libkern.h>
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#else
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#include <string.h>
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#endif
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#include "stand.h"
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#include "ext2fs.h"
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#if defined(LIBSA_FS_SINGLECOMPONENT) && !defined(LIBSA_NO_FS_SYMLINK)
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#define LIBSA_NO_FS_SYMLINK
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#endif
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#if defined(LIBSA_NO_TWIDDLE)
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#define twiddle()
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#endif
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#ifndef indp_t
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#define indp_t int32_t
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#endif
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typedef uint32_t ino32_t;
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#ifndef FSBTODB
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#define FSBTODB(fs, indp) EXT2_FSBTODB(fs, indp)
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#endif
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/*
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* To avoid having a lot of filesystem-block sized buffers lurking (which
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* could be 32k) we only keep a few entries of the indirect block map.
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* With 8k blocks, 2^8 blocks is ~500k so we reread the indirect block
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* ~13 times pulling in a 6M kernel.
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* The cache size must be smaller than the smallest filesystem block,
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* so LN2_IND_CACHE_SZ <= 9 (UFS2 and 4k blocks).
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*/
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#define LN2_IND_CACHE_SZ 6
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#define IND_CACHE_SZ (1 << LN2_IND_CACHE_SZ)
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#define IND_CACHE_MASK (IND_CACHE_SZ - 1)
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/*
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* In-core open file.
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*/
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struct file {
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off_t f_seekp; /* seek pointer */
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struct m_ext2fs *f_fs; /* pointer to super-block */
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struct ext2fs_dinode f_di; /* copy of on-disk inode */
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uint f_nishift; /* for blocks in indirect block */
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indp_t f_ind_cache_block;
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indp_t f_ind_cache[IND_CACHE_SZ];
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char *f_buf; /* buffer for data block */
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size_t f_buf_size; /* size of data block */
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daddr_t f_buf_blkno; /* block number of data block */
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};
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#if defined(LIBSA_ENABLE_LS_OP)
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#define NELEM(x) (sizeof (x) / sizeof(*x))
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typedef struct entry_t entry_t;
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struct entry_t {
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entry_t *e_next;
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ino32_t e_ino;
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uint8_t e_type;
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char e_name[1];
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};
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static const char *const typestr[] = {
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"unknown",
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"REG",
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"DIR",
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"CHR",
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"BLK",
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"FIFO",
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"SOCK",
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"LNK"
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};
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#endif /* LIBSA_ENABLE_LS_OP */
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static int read_inode(ino32_t, struct open_file *);
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static int block_map(struct open_file *, indp_t, indp_t *);
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static int buf_read_file(struct open_file *, char **, size_t *);
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static int search_directory(const char *, int, struct open_file *, ino32_t *);
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static int read_sblock(struct open_file *, struct m_ext2fs *);
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static int read_gdblock(struct open_file *, struct m_ext2fs *);
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#ifdef EXT2FS_DEBUG
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static void dump_sblock(struct m_ext2fs *);
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#endif
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/*
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* Read a new inode into a file structure.
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*/
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static int
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read_inode(ino32_t inumber, struct open_file *f)
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{
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struct file *fp = (struct file *)f->f_fsdata;
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struct m_ext2fs *fs = fp->f_fs;
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char *buf;
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size_t rsize;
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int rc;
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daddr_t inode_sector;
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struct ext2fs_dinode *dip;
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inode_sector = FSBTODB(fs, ino_to_fsba(fs, inumber));
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/*
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* Read inode and save it.
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*/
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buf = fp->f_buf;
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twiddle();
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rc = DEV_STRATEGY(f->f_dev)(f->f_devdata, F_READ,
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inode_sector, fs->e2fs_bsize, buf, &rsize);
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if (rc)
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return rc;
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if (rsize != fs->e2fs_bsize)
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return EIO;
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dip = (struct ext2fs_dinode *)(buf +
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EXT2_DINODE_SIZE(fs) * ino_to_fsbo(fs, inumber));
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e2fs_iload(dip, &fp->f_di);
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/*
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* Clear out the old buffers
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*/
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fp->f_ind_cache_block = ~0;
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fp->f_buf_blkno = -1;
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return rc;
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}
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/*
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* Given an offset in a file, find the disk block number that
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* contains that block.
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*/
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static int
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block_map(struct open_file *f, indp_t file_block, indp_t *disk_block_p)
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{
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struct file *fp = (struct file *)f->f_fsdata;
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struct m_ext2fs *fs = fp->f_fs;
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uint level;
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indp_t ind_cache;
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indp_t ind_block_num;
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size_t rsize;
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int rc;
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indp_t *buf = (void *)fp->f_buf;
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/*
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* Index structure of an inode:
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*
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* e2di_blocks[0..EXT2FS_NDADDR-1]
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* hold block numbers for blocks
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* 0..EXT2FS_NDADDR-1
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*
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* e2di_blocks[EXT2FS_NDADDR+0]
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* block EXT2FS_NDADDR+0 is the single indirect block
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* holds block numbers for blocks
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* EXT2FS_NDADDR .. EXT2FS_NDADDR + EXT2_NINDIR(fs)-1
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*
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* e2di_blocks[EXT2FS_NDADDR+1]
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* block EXT2FS_NDADDR+1 is the double indirect block
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* holds block numbers for INDEX blocks for blocks
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* EXT2FS_NDADDR + EXT2_NINDIR(fs) ..
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* EXT2FS_NDADDR + EXT2_NINDIR(fs) + EXT2_NINDIR(fs)**2 - 1
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*
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* e2di_blocks[EXT2FS_NDADDR+2]
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* block EXT2FS_NDADDR+2 is the triple indirect block
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* holds block numbers for double-indirect
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* blocks for blocks
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* EXT2FS_NDADDR + EXT2_NINDIR(fs) + EXT2_NINDIR(fs)**2 ..
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* EXT2FS_NDADDR + EXT2_NINDIR(fs) + EXT2_NINDIR(fs)**2
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* + EXT2_NINDIR(fs)**3 - 1
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*/
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if (file_block < EXT2FS_NDADDR) {
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/* Direct block. */
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*disk_block_p = fs2h32(fp->f_di.e2di_blocks[file_block]);
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return 0;
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}
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file_block -= EXT2FS_NDADDR;
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ind_cache = file_block >> LN2_IND_CACHE_SZ;
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if (ind_cache == fp->f_ind_cache_block) {
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*disk_block_p =
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fs2h32(fp->f_ind_cache[file_block & IND_CACHE_MASK]);
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return 0;
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}
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for (level = 0;;) {
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level += fp->f_nishift;
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if (file_block < (indp_t)1 << level)
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break;
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if (level > EXT2FS_NIADDR * fp->f_nishift)
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/* Block number too high */
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return EFBIG;
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file_block -= (indp_t)1 << level;
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}
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ind_block_num =
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fs2h32(fp->f_di.e2di_blocks[EXT2FS_NDADDR +
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(level / fp->f_nishift - 1)]);
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for (;;) {
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level -= fp->f_nishift;
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if (ind_block_num == 0) {
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*disk_block_p = 0; /* missing */
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return 0;
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}
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twiddle();
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/*
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* If we were feeling brave, we could work out the number
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* of the disk sector and read a single disk sector instead
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* of a filesystem block.
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* However we don't do this very often anyway...
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*/
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rc = DEV_STRATEGY(f->f_dev)(f->f_devdata, F_READ,
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FSBTODB(fp->f_fs, ind_block_num), fs->e2fs_bsize,
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buf, &rsize);
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if (rc)
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return rc;
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if (rsize != fs->e2fs_bsize)
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return EIO;
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ind_block_num = fs2h32(buf[file_block >> level]);
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if (level == 0)
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break;
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file_block &= (1 << level) - 1;
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}
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/* Save the part of the block that contains this sector */
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memcpy(fp->f_ind_cache, &buf[file_block & ~IND_CACHE_MASK],
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IND_CACHE_SZ * sizeof fp->f_ind_cache[0]);
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fp->f_ind_cache_block = ind_cache;
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*disk_block_p = ind_block_num;
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return 0;
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}
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/*
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* Read a portion of a file into an internal buffer.
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* Return the location in the buffer and the amount in the buffer.
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*/
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static int
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buf_read_file(struct open_file *f, char **buf_p, size_t *size_p)
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{
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struct file *fp = (struct file *)f->f_fsdata;
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struct m_ext2fs *fs = fp->f_fs;
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long off;
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indp_t file_block;
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indp_t disk_block = 0; /* XXX: gcc */
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size_t block_size;
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int rc;
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off = ext2_blkoff(fs, fp->f_seekp);
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file_block = ext2_lblkno(fs, fp->f_seekp);
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block_size = fs->e2fs_bsize; /* no fragment */
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if (file_block != fp->f_buf_blkno) {
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rc = block_map(f, file_block, &disk_block);
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if (rc)
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return rc;
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if (disk_block == 0) {
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memset(fp->f_buf, 0, block_size);
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fp->f_buf_size = block_size;
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} else {
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twiddle();
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rc = DEV_STRATEGY(f->f_dev)(f->f_devdata, F_READ,
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FSBTODB(fs, disk_block),
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block_size, fp->f_buf, &fp->f_buf_size);
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if (rc)
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return rc;
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}
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fp->f_buf_blkno = file_block;
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}
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/*
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* Return address of byte in buffer corresponding to
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* offset, and size of remainder of buffer after that
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* byte.
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*/
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*buf_p = fp->f_buf + off;
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*size_p = block_size - off;
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/*
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* But truncate buffer at end of file.
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*/
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/* XXX should handle LARGEFILE */
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if (*size_p > fp->f_di.e2di_size - fp->f_seekp)
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*size_p = fp->f_di.e2di_size - fp->f_seekp;
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return 0;
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}
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/*
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* Search a directory for a name and return its
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* inode number.
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*/
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static int
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search_directory(const char *name, int length, struct open_file *f,
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ino32_t *inumber_p)
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{
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struct file *fp = (struct file *)f->f_fsdata;
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struct ext2fs_direct *dp;
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struct ext2fs_direct *edp;
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char *buf;
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size_t buf_size;
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int namlen;
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int rc;
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fp->f_seekp = 0;
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/* XXX should handle LARGEFILE */
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while (fp->f_seekp < (off_t)fp->f_di.e2di_size) {
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rc = buf_read_file(f, &buf, &buf_size);
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if (rc)
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return rc;
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dp = (struct ext2fs_direct *)buf;
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edp = (struct ext2fs_direct *)(buf + buf_size);
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for (; dp < edp;
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dp = (void *)((char *)dp + fs2h16(dp->e2d_reclen))) {
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if (fs2h16(dp->e2d_reclen) <= 0)
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break;
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if (fs2h32(dp->e2d_ino) == (ino32_t)0)
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continue;
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namlen = dp->e2d_namlen;
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if (namlen == length &&
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!memcmp(name, dp->e2d_name, length)) {
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/* found entry */
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*inumber_p = fs2h32(dp->e2d_ino);
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return 0;
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}
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}
|
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fp->f_seekp += buf_size;
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}
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return ENOENT;
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}
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|
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int
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read_sblock(struct open_file *f, struct m_ext2fs *fs)
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{
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static uint8_t sbbuf[SBSIZE];
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struct ext2fs ext2fs;
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size_t buf_size;
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int rc;
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rc = DEV_STRATEGY(f->f_dev)(f->f_devdata, F_READ,
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SBOFF / DEV_BSIZE, SBSIZE, sbbuf, &buf_size);
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if (rc)
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return rc;
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|
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if (buf_size != SBSIZE)
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return EIO;
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|
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e2fs_sbload((void *)sbbuf, &ext2fs);
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if (ext2fs.e2fs_magic != E2FS_MAGIC)
|
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return EINVAL;
|
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if (ext2fs.e2fs_rev > E2FS_REV1 ||
|
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(ext2fs.e2fs_rev == E2FS_REV1 &&
|
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(ext2fs.e2fs_first_ino != EXT2_FIRSTINO ||
|
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(ext2fs.e2fs_inode_size != 128 && ext2fs.e2fs_inode_size != 256) ||
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ext2fs.e2fs_features_incompat & ~EXT2F_INCOMPAT_SUPP))) {
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return ENODEV;
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}
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|
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e2fs_sbload((void *)sbbuf, &fs->e2fs);
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/* compute in-memory m_ext2fs values */
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fs->e2fs_ncg =
|
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howmany(fs->e2fs.e2fs_bcount - fs->e2fs.e2fs_first_dblock,
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fs->e2fs.e2fs_bpg);
|
|
/* XXX assume hw bsize = 512 */
|
|
fs->e2fs_fsbtodb = fs->e2fs.e2fs_log_bsize + 1;
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fs->e2fs_bsize = MINBSIZE << fs->e2fs.e2fs_log_bsize;
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fs->e2fs_bshift = LOG_MINBSIZE + fs->e2fs.e2fs_log_bsize;
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fs->e2fs_qbmask = fs->e2fs_bsize - 1;
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fs->e2fs_bmask = ~fs->e2fs_qbmask;
|
|
fs->e2fs_ngdb =
|
|
howmany(fs->e2fs_ncg, fs->e2fs_bsize / sizeof(struct ext2_gd));
|
|
fs->e2fs_ipb = fs->e2fs_bsize / ext2fs.e2fs_inode_size;
|
|
fs->e2fs_itpg = fs->e2fs.e2fs_ipg / fs->e2fs_ipb;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
read_gdblock(struct open_file *f, struct m_ext2fs *fs)
|
|
{
|
|
struct file *fp = (struct file *)f->f_fsdata;
|
|
size_t rsize;
|
|
uint gdpb;
|
|
int i, rc;
|
|
|
|
gdpb = fs->e2fs_bsize / sizeof(struct ext2_gd);
|
|
|
|
for (i = 0; i < fs->e2fs_ngdb; i++) {
|
|
rc = DEV_STRATEGY(f->f_dev)(f->f_devdata, F_READ,
|
|
FSBTODB(fs, fs->e2fs.e2fs_first_dblock +
|
|
1 /* superblock */ + i),
|
|
fs->e2fs_bsize, fp->f_buf, &rsize);
|
|
if (rc)
|
|
return rc;
|
|
if (rsize != fs->e2fs_bsize)
|
|
return EIO;
|
|
|
|
e2fs_cgload((struct ext2_gd *)fp->f_buf,
|
|
&fs->e2fs_gd[i * gdpb],
|
|
(i == (fs->e2fs_ngdb - 1)) ?
|
|
(fs->e2fs_ncg - gdpb * i) * sizeof(struct ext2_gd):
|
|
fs->e2fs_bsize);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Open a file.
|
|
*/
|
|
__compactcall int
|
|
ext2fs_open(const char *path, struct open_file *f)
|
|
{
|
|
#ifndef LIBSA_FS_SINGLECOMPONENT
|
|
const char *cp, *ncp;
|
|
int c;
|
|
#endif
|
|
ino32_t inumber;
|
|
struct file *fp;
|
|
struct m_ext2fs *fs;
|
|
int rc;
|
|
#ifndef LIBSA_NO_FS_SYMLINK
|
|
ino32_t parent_inumber;
|
|
int nlinks = 0;
|
|
char namebuf[MAXPATHLEN+1];
|
|
char *buf;
|
|
#endif
|
|
|
|
/* allocate file system specific data structure */
|
|
fp = alloc(sizeof(struct file));
|
|
memset(fp, 0, sizeof(struct file));
|
|
f->f_fsdata = (void *)fp;
|
|
|
|
/* allocate space and read super block */
|
|
fs = alloc(sizeof(*fs));
|
|
memset(fs, 0, sizeof(*fs));
|
|
fp->f_fs = fs;
|
|
twiddle();
|
|
|
|
rc = read_sblock(f, fs);
|
|
if (rc)
|
|
goto out;
|
|
|
|
#ifdef EXT2FS_DEBUG
|
|
dump_sblock(fs);
|
|
#endif
|
|
|
|
/* alloc a block sized buffer used for all fs transfers */
|
|
fp->f_buf = alloc(fs->e2fs_bsize);
|
|
|
|
/* read group descriptor blocks */
|
|
fs->e2fs_gd = alloc(sizeof(struct ext2_gd) * fs->e2fs_ncg);
|
|
rc = read_gdblock(f, fs);
|
|
if (rc)
|
|
goto out;
|
|
|
|
/*
|
|
* Calculate indirect block levels.
|
|
*/
|
|
{
|
|
indp_t mult;
|
|
int ln2;
|
|
|
|
/*
|
|
* We note that the number of indirect blocks is always
|
|
* a power of 2. This lets us use shifts and masks instead
|
|
* of divide and remainder and avoinds pulling in the
|
|
* 64bit division routine into the boot code.
|
|
*/
|
|
mult = EXT2_NINDIR(fs);
|
|
#ifdef DEBUG
|
|
if (!powerof2(mult)) {
|
|
/* Hummm was't a power of 2 */
|
|
rc = EINVAL;
|
|
goto out;
|
|
}
|
|
#endif
|
|
for (ln2 = 0; mult != 1; ln2++)
|
|
mult >>= 1;
|
|
|
|
fp->f_nishift = ln2;
|
|
}
|
|
|
|
inumber = EXT2_ROOTINO;
|
|
if ((rc = read_inode(inumber, f)) != 0)
|
|
goto out;
|
|
|
|
#ifndef LIBSA_FS_SINGLECOMPONENT
|
|
cp = path;
|
|
while (*cp) {
|
|
|
|
/*
|
|
* Remove extra separators
|
|
*/
|
|
while (*cp == '/')
|
|
cp++;
|
|
if (*cp == '\0')
|
|
break;
|
|
|
|
/*
|
|
* Check that current node is a directory.
|
|
*/
|
|
if ((fp->f_di.e2di_mode & EXT2_IFMT) != EXT2_IFDIR) {
|
|
rc = ENOTDIR;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Get next component of path name.
|
|
*/
|
|
ncp = cp;
|
|
while ((c = *cp) != '\0' && c != '/')
|
|
cp++;
|
|
|
|
/*
|
|
* Look up component in current directory.
|
|
* Save directory inumber in case we find a
|
|
* symbolic link.
|
|
*/
|
|
#ifndef LIBSA_NO_FS_SYMLINK
|
|
parent_inumber = inumber;
|
|
#endif
|
|
rc = search_directory(ncp, cp - ncp, f, &inumber);
|
|
if (rc)
|
|
goto out;
|
|
|
|
/*
|
|
* Open next component.
|
|
*/
|
|
if ((rc = read_inode(inumber, f)) != 0)
|
|
goto out;
|
|
|
|
#ifndef LIBSA_NO_FS_SYMLINK
|
|
/*
|
|
* Check for symbolic link.
|
|
*/
|
|
if ((fp->f_di.e2di_mode & EXT2_IFMT) == EXT2_IFLNK) {
|
|
/* XXX should handle LARGEFILE */
|
|
int link_len = fp->f_di.e2di_size;
|
|
int len;
|
|
|
|
len = strlen(cp);
|
|
|
|
if (link_len + len > MAXPATHLEN ||
|
|
++nlinks > MAXSYMLINKS) {
|
|
rc = ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
memmove(&namebuf[link_len], cp, len + 1);
|
|
|
|
if (link_len < EXT2_MAXSYMLINKLEN) {
|
|
memcpy(namebuf, fp->f_di.e2di_blocks, link_len);
|
|
} else {
|
|
/*
|
|
* Read file for symbolic link
|
|
*/
|
|
size_t buf_size;
|
|
indp_t disk_block;
|
|
|
|
buf = fp->f_buf;
|
|
rc = block_map(f, (indp_t)0, &disk_block);
|
|
if (rc)
|
|
goto out;
|
|
|
|
twiddle();
|
|
rc = DEV_STRATEGY(f->f_dev)(f->f_devdata,
|
|
F_READ, FSBTODB(fs, disk_block),
|
|
fs->e2fs_bsize, buf, &buf_size);
|
|
if (rc)
|
|
goto out;
|
|
|
|
memcpy(namebuf, buf, link_len);
|
|
}
|
|
|
|
/*
|
|
* If relative pathname, restart at parent directory.
|
|
* If absolute pathname, restart at root.
|
|
*/
|
|
cp = namebuf;
|
|
if (*cp != '/')
|
|
inumber = parent_inumber;
|
|
else
|
|
inumber = (ino32_t)EXT2_ROOTINO;
|
|
|
|
if ((rc = read_inode(inumber, f)) != 0)
|
|
goto out;
|
|
}
|
|
#endif /* !LIBSA_NO_FS_SYMLINK */
|
|
}
|
|
|
|
/*
|
|
* Found terminal component.
|
|
*/
|
|
rc = 0;
|
|
|
|
#else /* !LIBSA_FS_SINGLECOMPONENT */
|
|
|
|
/* look up component in the current (root) directory */
|
|
rc = search_directory(path, strlen(path), f, &inumber);
|
|
if (rc)
|
|
goto out;
|
|
|
|
/* open it */
|
|
rc = read_inode(inumber, f);
|
|
|
|
#endif /* !LIBSA_FS_SINGLECOMPONENT */
|
|
|
|
fp->f_seekp = 0; /* reset seek pointer */
|
|
|
|
out:
|
|
if (rc)
|
|
ext2fs_close(f);
|
|
else {
|
|
fsmod = "ext2fs";
|
|
fsmod2 = "ffs";
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
__compactcall int
|
|
ext2fs_close(struct open_file *f)
|
|
{
|
|
struct file *fp = (struct file *)f->f_fsdata;
|
|
|
|
f->f_fsdata = NULL;
|
|
if (fp == NULL)
|
|
return 0;
|
|
|
|
if (fp->f_fs->e2fs_gd)
|
|
dealloc(fp->f_fs->e2fs_gd,
|
|
sizeof(struct ext2_gd) * fp->f_fs->e2fs_ncg);
|
|
if (fp->f_buf)
|
|
dealloc(fp->f_buf, fp->f_fs->e2fs_bsize);
|
|
dealloc(fp->f_fs, sizeof(*fp->f_fs));
|
|
dealloc(fp, sizeof(struct file));
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Copy a portion of a file into kernel memory.
|
|
* Cross block boundaries when necessary.
|
|
*/
|
|
__compactcall int
|
|
ext2fs_read(struct open_file *f, void *start, size_t size, size_t *resid)
|
|
{
|
|
struct file *fp = (struct file *)f->f_fsdata;
|
|
size_t csize;
|
|
char *buf;
|
|
size_t buf_size;
|
|
int rc = 0;
|
|
char *addr = start;
|
|
|
|
while (size != 0) {
|
|
/* XXX should handle LARGEFILE */
|
|
if (fp->f_seekp >= (off_t)fp->f_di.e2di_size)
|
|
break;
|
|
|
|
rc = buf_read_file(f, &buf, &buf_size);
|
|
if (rc)
|
|
break;
|
|
|
|
csize = size;
|
|
if (csize > buf_size)
|
|
csize = buf_size;
|
|
|
|
memcpy(addr, buf, csize);
|
|
|
|
fp->f_seekp += csize;
|
|
addr += csize;
|
|
size -= csize;
|
|
}
|
|
if (resid)
|
|
*resid = size;
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* Not implemented.
|
|
*/
|
|
#ifndef LIBSA_NO_FS_WRITE
|
|
__compactcall int
|
|
ext2fs_write(struct open_file *f, void *start, size_t size, size_t *resid)
|
|
{
|
|
|
|
return EROFS;
|
|
}
|
|
#endif /* !LIBSA_NO_FS_WRITE */
|
|
|
|
#ifndef LIBSA_NO_FS_SEEK
|
|
__compactcall off_t
|
|
ext2fs_seek(struct open_file *f, off_t offset, int where)
|
|
{
|
|
struct file *fp = (struct file *)f->f_fsdata;
|
|
|
|
switch (where) {
|
|
case SEEK_SET:
|
|
fp->f_seekp = offset;
|
|
break;
|
|
case SEEK_CUR:
|
|
fp->f_seekp += offset;
|
|
break;
|
|
case SEEK_END:
|
|
/* XXX should handle LARGEFILE */
|
|
fp->f_seekp = fp->f_di.e2di_size - offset;
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
return fp->f_seekp;
|
|
}
|
|
#endif /* !LIBSA_NO_FS_SEEK */
|
|
|
|
__compactcall int
|
|
ext2fs_stat(struct open_file *f, struct stat *sb)
|
|
{
|
|
struct file *fp = (struct file *)f->f_fsdata;
|
|
|
|
/* only important stuff */
|
|
memset(sb, 0, sizeof *sb);
|
|
sb->st_mode = fp->f_di.e2di_mode;
|
|
sb->st_uid = fp->f_di.e2di_uid;
|
|
sb->st_gid = fp->f_di.e2di_gid;
|
|
/* XXX should handle LARGEFILE */
|
|
sb->st_size = fp->f_di.e2di_size;
|
|
return 0;
|
|
}
|
|
|
|
#if defined(LIBSA_ENABLE_LS_OP)
|
|
__compactcall void
|
|
ext2fs_ls(struct open_file *f, const char *pattern,
|
|
void (*funcp)(char* arg), char* path)
|
|
{
|
|
struct file *fp = (struct file *)f->f_fsdata;
|
|
size_t block_size = fp->f_fs->e2fs_bsize;
|
|
char *buf;
|
|
size_t buf_size;
|
|
entry_t *names = 0, *n, **np;
|
|
|
|
fp->f_seekp = 0;
|
|
while (fp->f_seekp < (off_t)fp->f_di.e2di_size) {
|
|
struct ext2fs_direct *dp, *edp;
|
|
int rc = buf_read_file(f, &buf, &buf_size);
|
|
if (rc)
|
|
goto out;
|
|
if (buf_size != block_size || buf_size == 0)
|
|
goto out;
|
|
|
|
dp = (struct ext2fs_direct *)buf;
|
|
edp = (struct ext2fs_direct *)(buf + buf_size);
|
|
|
|
for (; dp < edp;
|
|
dp = (void *)((char *)dp + fs2h16(dp->e2d_reclen))) {
|
|
const char *t;
|
|
|
|
if (fs2h16(dp->e2d_reclen) <= 0)
|
|
goto out;
|
|
|
|
if (fs2h32(dp->e2d_ino) == 0)
|
|
continue;
|
|
|
|
if (dp->e2d_type >= NELEM(typestr) ||
|
|
!(t = typestr[dp->e2d_type])) {
|
|
/*
|
|
* This does not handle "old"
|
|
* filesystems properly. On little
|
|
* endian machines, we get a bogus
|
|
* type name if the namlen matches a
|
|
* valid type identifier. We could
|
|
* check if we read namlen "0" and
|
|
* handle this case specially, if
|
|
* there were a pressing need...
|
|
*/
|
|
printf("bad dir entry\n");
|
|
goto out;
|
|
}
|
|
if (pattern && !fnmatch(dp->e2d_name, pattern))
|
|
continue;
|
|
n = alloc(sizeof *n + strlen(dp->e2d_name));
|
|
if (!n) {
|
|
printf("%d: %s (%s)\n",
|
|
fs2h32(dp->e2d_ino), dp->e2d_name, t);
|
|
continue;
|
|
}
|
|
n->e_ino = fs2h32(dp->e2d_ino);
|
|
n->e_type = dp->e2d_type;
|
|
strcpy(n->e_name, dp->e2d_name);
|
|
for (np = &names; *np; np = &(*np)->e_next) {
|
|
if (strcmp(n->e_name, (*np)->e_name) < 0)
|
|
break;
|
|
}
|
|
n->e_next = *np;
|
|
*np = n;
|
|
}
|
|
fp->f_seekp += buf_size;
|
|
}
|
|
|
|
if (names) {
|
|
entry_t *p_names = names;
|
|
do {
|
|
n = p_names;
|
|
printf("%d: %s (%s)\n",
|
|
n->e_ino, n->e_name, typestr[n->e_type]);
|
|
p_names = n->e_next;
|
|
} while (p_names);
|
|
} else {
|
|
printf("not found\n");
|
|
}
|
|
out:
|
|
if (names) {
|
|
do {
|
|
n = names;
|
|
names = n->e_next;
|
|
dealloc(n, 0);
|
|
} while (names);
|
|
}
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* byte swap functions for big endian machines
|
|
* (ext2fs is always little endian)
|
|
*
|
|
* XXX: We should use src/sys/ufs/ext2fs/ext2fs_bswap.c
|
|
*/
|
|
|
|
/* These functions are only needed if native byte order is not big endian */
|
|
#if BYTE_ORDER == BIG_ENDIAN
|
|
void
|
|
e2fs_sb_bswap(struct ext2fs *old, struct ext2fs *new)
|
|
{
|
|
|
|
/* preserve unused fields */
|
|
memcpy(new, old, sizeof(struct ext2fs));
|
|
new->e2fs_icount = bswap32(old->e2fs_icount);
|
|
new->e2fs_bcount = bswap32(old->e2fs_bcount);
|
|
new->e2fs_rbcount = bswap32(old->e2fs_rbcount);
|
|
new->e2fs_fbcount = bswap32(old->e2fs_fbcount);
|
|
new->e2fs_ficount = bswap32(old->e2fs_ficount);
|
|
new->e2fs_first_dblock = bswap32(old->e2fs_first_dblock);
|
|
new->e2fs_log_bsize = bswap32(old->e2fs_log_bsize);
|
|
new->e2fs_fsize = bswap32(old->e2fs_fsize);
|
|
new->e2fs_bpg = bswap32(old->e2fs_bpg);
|
|
new->e2fs_fpg = bswap32(old->e2fs_fpg);
|
|
new->e2fs_ipg = bswap32(old->e2fs_ipg);
|
|
new->e2fs_mtime = bswap32(old->e2fs_mtime);
|
|
new->e2fs_wtime = bswap32(old->e2fs_wtime);
|
|
new->e2fs_mnt_count = bswap16(old->e2fs_mnt_count);
|
|
new->e2fs_max_mnt_count = bswap16(old->e2fs_max_mnt_count);
|
|
new->e2fs_magic = bswap16(old->e2fs_magic);
|
|
new->e2fs_state = bswap16(old->e2fs_state);
|
|
new->e2fs_beh = bswap16(old->e2fs_beh);
|
|
new->e2fs_minrev = bswap16(old->e2fs_minrev);
|
|
new->e2fs_lastfsck = bswap32(old->e2fs_lastfsck);
|
|
new->e2fs_fsckintv = bswap32(old->e2fs_fsckintv);
|
|
new->e2fs_creator = bswap32(old->e2fs_creator);
|
|
new->e2fs_rev = bswap32(old->e2fs_rev);
|
|
new->e2fs_ruid = bswap16(old->e2fs_ruid);
|
|
new->e2fs_rgid = bswap16(old->e2fs_rgid);
|
|
new->e2fs_first_ino = bswap32(old->e2fs_first_ino);
|
|
new->e2fs_inode_size = bswap16(old->e2fs_inode_size);
|
|
new->e2fs_block_group_nr = bswap16(old->e2fs_block_group_nr);
|
|
new->e2fs_features_compat = bswap32(old->e2fs_features_compat);
|
|
new->e2fs_features_incompat = bswap32(old->e2fs_features_incompat);
|
|
new->e2fs_features_rocompat = bswap32(old->e2fs_features_rocompat);
|
|
new->e2fs_algo = bswap32(old->e2fs_algo);
|
|
new->e2fs_reserved_ngdb = bswap16(old->e2fs_reserved_ngdb);
|
|
}
|
|
|
|
void e2fs_cg_bswap(struct ext2_gd *old, struct ext2_gd *new, int size)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < (size / sizeof(struct ext2_gd)); i++) {
|
|
new[i].ext2bgd_b_bitmap = bswap32(old[i].ext2bgd_b_bitmap);
|
|
new[i].ext2bgd_i_bitmap = bswap32(old[i].ext2bgd_i_bitmap);
|
|
new[i].ext2bgd_i_tables = bswap32(old[i].ext2bgd_i_tables);
|
|
new[i].ext2bgd_nbfree = bswap16(old[i].ext2bgd_nbfree);
|
|
new[i].ext2bgd_nifree = bswap16(old[i].ext2bgd_nifree);
|
|
new[i].ext2bgd_ndirs = bswap16(old[i].ext2bgd_ndirs);
|
|
}
|
|
}
|
|
|
|
void e2fs_i_bswap(struct ext2fs_dinode *old, struct ext2fs_dinode *new)
|
|
{
|
|
|
|
new->e2di_mode = bswap16(old->e2di_mode);
|
|
new->e2di_uid = bswap16(old->e2di_uid);
|
|
new->e2di_gid = bswap16(old->e2di_gid);
|
|
new->e2di_nlink = bswap16(old->e2di_nlink);
|
|
new->e2di_size = bswap32(old->e2di_size);
|
|
new->e2di_atime = bswap32(old->e2di_atime);
|
|
new->e2di_ctime = bswap32(old->e2di_ctime);
|
|
new->e2di_mtime = bswap32(old->e2di_mtime);
|
|
new->e2di_dtime = bswap32(old->e2di_dtime);
|
|
new->e2di_nblock = bswap32(old->e2di_nblock);
|
|
new->e2di_flags = bswap32(old->e2di_flags);
|
|
new->e2di_gen = bswap32(old->e2di_gen);
|
|
new->e2di_facl = bswap32(old->e2di_facl);
|
|
new->e2di_dacl = bswap32(old->e2di_dacl);
|
|
new->e2di_faddr = bswap32(old->e2di_faddr);
|
|
memcpy(&new->e2di_blocks[0], &old->e2di_blocks[0],
|
|
(EXT2FS_NDADDR + EXT2FS_NIADDR) * sizeof(uint32_t));
|
|
}
|
|
#endif
|
|
|
|
#ifdef EXT2FS_DEBUG
|
|
void
|
|
dump_sblock(struct m_ext2fs *fs)
|
|
{
|
|
|
|
printf("fs->e2fs.e2fs_bcount = %u\n", fs->e2fs.e2fs_bcount);
|
|
printf("fs->e2fs.e2fs_first_dblock = %u\n", fs->e2fs.e2fs_first_dblock);
|
|
printf("fs->e2fs.e2fs_log_bsize = %u\n", fs->e2fs.e2fs_log_bsize);
|
|
printf("fs->e2fs.e2fs_bpg = %u\n", fs->e2fs.e2fs_bpg);
|
|
printf("fs->e2fs.e2fs_ipg = %u\n", fs->e2fs.e2fs_ipg);
|
|
printf("fs->e2fs.e2fs_magic = 0x%x\n", fs->e2fs.e2fs_magic);
|
|
printf("fs->e2fs.e2fs_rev = %u\n", fs->e2fs.e2fs_rev);
|
|
|
|
if (fs->e2fs.e2fs_rev == E2FS_REV1) {
|
|
printf("fs->e2fs.e2fs_first_ino = %u\n",
|
|
fs->e2fs.e2fs_first_ino);
|
|
printf("fs->e2fs.e2fs_inode_size = %u\n",
|
|
fs->e2fs.e2fs_inode_size);
|
|
printf("fs->e2fs.e2fs_features_compat = %u\n",
|
|
fs->e2fs.e2fs_features_compat);
|
|
printf("fs->e2fs.e2fs_features_incompat = %u\n",
|
|
fs->e2fs.e2fs_features_incompat);
|
|
printf("fs->e2fs.e2fs_features_rocompat = %u\n",
|
|
fs->e2fs.e2fs_features_rocompat);
|
|
printf("fs->e2fs.e2fs_reserved_ngdb = %u\n",
|
|
fs->e2fs.e2fs_reserved_ngdb);
|
|
}
|
|
|
|
printf("fs->e2fs_bsize = %u\n", fs->e2fs_bsize);
|
|
printf("fs->e2fs_fsbtodb = %u\n", fs->e2fs_fsbtodb);
|
|
printf("fs->e2fs_ncg = %u\n", fs->e2fs_ncg);
|
|
printf("fs->e2fs_ngdb = %u\n", fs->e2fs_ngdb);
|
|
printf("fs->e2fs_ipb = %u\n", fs->e2fs_ipb);
|
|
printf("fs->e2fs_itpg = %u\n", fs->e2fs_itpg);
|
|
}
|
|
#endif
|