1 files changed, 0 insertions, 316 deletions

diff --git a/qemu/roms/u-boot/fs/ubifs/io.c b/qemu/roms/u-boot/fs/ubifs/io.c
deleted file mode 100644
index aae5c65ea..000000000
--- a/qemu/roms/u-boot/fs/ubifs/io.c
+++ /dev/null
@@ -1,316 +0,0 @@
-/*
- * This file is part of UBIFS.
- *
- * Copyright (C) 2006-2008 Nokia Corporation.
- * Copyright (C) 2006, 2007 University of Szeged, Hungary
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * Authors: Artem Bityutskiy (Битюцкий Артём)
- *          Adrian Hunter
- *          Zoltan Sogor
- */
-
-/*
- * This file implements UBIFS I/O subsystem which provides various I/O-related
- * helper functions (reading/writing/checking/validating nodes) and implements
- * write-buffering support. Write buffers help to save space which otherwise
- * would have been wasted for padding to the nearest minimal I/O unit boundary.
- * Instead, data first goes to the write-buffer and is flushed when the
- * buffer is full or when it is not used for some time (by timer). This is
- * similar to the mechanism is used by JFFS2.
- *
- * Write-buffers are defined by 'struct ubifs_wbuf' objects and protected by
- * mutexes defined inside these objects. Since sometimes upper-level code
- * has to lock the write-buffer (e.g. journal space reservation code), many
- * functions related to write-buffers have "nolock" suffix which means that the
- * caller has to lock the write-buffer before calling this function.
- *
- * UBIFS stores nodes at 64 bit-aligned addresses. If the node length is not
- * aligned, UBIFS starts the next node from the aligned address, and the padded
- * bytes may contain any rubbish. In other words, UBIFS does not put padding
- * bytes in those small gaps. Common headers of nodes store real node lengths,
- * not aligned lengths. Indexing nodes also store real lengths in branches.
- *
- * UBIFS uses padding when it pads to the next min. I/O unit. In this case it
- * uses padding nodes or padding bytes, if the padding node does not fit.
- *
- * All UBIFS nodes are protected by CRC checksums and UBIFS checks all nodes
- * every time they are read from the flash media.
- */
-
-#include "ubifs.h"
-
-/**
- * ubifs_ro_mode - switch UBIFS to read read-only mode.
- * @c: UBIFS file-system description object
- * @err: error code which is the reason of switching to R/O mode
- */
-void ubifs_ro_mode(struct ubifs_info *c, int err)
-{
-	if (!c->ro_media) {
-		c->ro_media = 1;
-		c->no_chk_data_crc = 0;
-		ubifs_warn("switched to read-only mode, error %d", err);
-		dbg_dump_stack();
-	}
-}
-
-/**
- * ubifs_check_node - check node.
- * @c: UBIFS file-system description object
- * @buf: node to check
- * @lnum: logical eraseblock number
- * @offs: offset within the logical eraseblock
- * @quiet: print no messages
- * @must_chk_crc: indicates whether to always check the CRC
- *
- * This function checks node magic number and CRC checksum. This function also
- * validates node length to prevent UBIFS from becoming crazy when an attacker
- * feeds it a file-system image with incorrect nodes. For example, too large
- * node length in the common header could cause UBIFS to read memory outside of
- * allocated buffer when checking the CRC checksum.
- *
- * This function may skip data nodes CRC checking if @c->no_chk_data_crc is
- * true, which is controlled by corresponding UBIFS mount option. However, if
- * @must_chk_crc is true, then @c->no_chk_data_crc is ignored and CRC is
- * checked. Similarly, if @c->always_chk_crc is true, @c->no_chk_data_crc is
- * ignored and CRC is checked.
- *
- * This function returns zero in case of success and %-EUCLEAN in case of bad
- * CRC or magic.
- */
-int ubifs_check_node(const struct ubifs_info *c, const void *buf, int lnum,
-		     int offs, int quiet, int must_chk_crc)
-{
-	int err = -EINVAL, type, node_len;
-	uint32_t crc, node_crc, magic;
-	const struct ubifs_ch *ch = buf;
-
-	ubifs_assert(lnum >= 0 && lnum < c->leb_cnt && offs >= 0);
-	ubifs_assert(!(offs & 7) && offs < c->leb_size);
-
-	magic = le32_to_cpu(ch->magic);
-	if (magic != UBIFS_NODE_MAGIC) {
-		if (!quiet)
-			ubifs_err("bad magic %#08x, expected %#08x",
-				  magic, UBIFS_NODE_MAGIC);
-		err = -EUCLEAN;
-		goto out;
-	}
-
-	type = ch->node_type;
-	if (type < 0 || type >= UBIFS_NODE_TYPES_CNT) {
-		if (!quiet)
-			ubifs_err("bad node type %d", type);
-		goto out;
-	}
-
-	node_len = le32_to_cpu(ch->len);
-	if (node_len + offs > c->leb_size)
-		goto out_len;
-
-	if (c->ranges[type].max_len == 0) {
-		if (node_len != c->ranges[type].len)
-			goto out_len;
-	} else if (node_len < c->ranges[type].min_len ||
-		   node_len > c->ranges[type].max_len)
-		goto out_len;
-
-	if (!must_chk_crc && type == UBIFS_DATA_NODE && !c->always_chk_crc &&
-	     c->no_chk_data_crc)
-		return 0;
-
-	crc = crc32(UBIFS_CRC32_INIT, buf + 8, node_len - 8);
-	node_crc = le32_to_cpu(ch->crc);
-	if (crc != node_crc) {
-		if (!quiet)
-			ubifs_err("bad CRC: calculated %#08x, read %#08x",
-				  crc, node_crc);
-		err = -EUCLEAN;
-		goto out;
-	}
-
-	return 0;
-
-out_len:
-	if (!quiet)
-		ubifs_err("bad node length %d", node_len);
-out:
-	if (!quiet) {
-		ubifs_err("bad node at LEB %d:%d", lnum, offs);
-		dbg_dump_node(c, buf);
-		dbg_dump_stack();
-	}
-	return err;
-}
-
-/**
- * ubifs_pad - pad flash space.
- * @c: UBIFS file-system description object
- * @buf: buffer to put padding to
- * @pad: how many bytes to pad
- *
- * The flash media obliges us to write only in chunks of %c->min_io_size and
- * when we have to write less data we add padding node to the write-buffer and
- * pad it to the next minimal I/O unit's boundary. Padding nodes help when the
- * media is being scanned. If the amount of wasted space is not enough to fit a
- * padding node which takes %UBIFS_PAD_NODE_SZ bytes, we write padding bytes
- * pattern (%UBIFS_PADDING_BYTE).
- *
- * Padding nodes are also used to fill gaps when the "commit-in-gaps" method is
- * used.
- */
-void ubifs_pad(const struct ubifs_info *c, void *buf, int pad)
-{
-	uint32_t crc;
-
-	ubifs_assert(pad >= 0 && !(pad & 7));
-
-	if (pad >= UBIFS_PAD_NODE_SZ) {
-		struct ubifs_ch *ch = buf;
-		struct ubifs_pad_node *pad_node = buf;
-
-		ch->magic = cpu_to_le32(UBIFS_NODE_MAGIC);
-		ch->node_type = UBIFS_PAD_NODE;
-		ch->group_type = UBIFS_NO_NODE_GROUP;
-		ch->padding[0] = ch->padding[1] = 0;
-		ch->sqnum = 0;
-		ch->len = cpu_to_le32(UBIFS_PAD_NODE_SZ);
-		pad -= UBIFS_PAD_NODE_SZ;
-		pad_node->pad_len = cpu_to_le32(pad);
-		crc = crc32(UBIFS_CRC32_INIT, buf + 8, UBIFS_PAD_NODE_SZ - 8);
-		ch->crc = cpu_to_le32(crc);
-		memset(buf + UBIFS_PAD_NODE_SZ, 0, pad);
-	} else if (pad > 0)
-		/* Too little space, padding node won't fit */
-		memset(buf, UBIFS_PADDING_BYTE, pad);
-}
-
-/**
- * next_sqnum - get next sequence number.
- * @c: UBIFS file-system description object
- */
-static unsigned long long next_sqnum(struct ubifs_info *c)
-{
-	unsigned long long sqnum;
-
-	spin_lock(&c->cnt_lock);
-	sqnum = ++c->max_sqnum;
-	spin_unlock(&c->cnt_lock);
-
-	if (unlikely(sqnum >= SQNUM_WARN_WATERMARK)) {
-		if (sqnum >= SQNUM_WATERMARK) {
-			ubifs_err("sequence number overflow %llu, end of life",
-				  sqnum);
-			ubifs_ro_mode(c, -EINVAL);
-		}
-		ubifs_warn("running out of sequence numbers, end of life soon");
-	}
-
-	return sqnum;
-}
-
-/**
- * ubifs_prepare_node - prepare node to be written to flash.
- * @c: UBIFS file-system description object
- * @node: the node to pad
- * @len: node length
- * @pad: if the buffer has to be padded
- *
- * This function prepares node at @node to be written to the media - it
- * calculates node CRC, fills the common header, and adds proper padding up to
- * the next minimum I/O unit if @pad is not zero.
- */
-void ubifs_prepare_node(struct ubifs_info *c, void *node, int len, int pad)
-{
-	uint32_t crc;
-	struct ubifs_ch *ch = node;
-	unsigned long long sqnum = next_sqnum(c);
-
-	ubifs_assert(len >= UBIFS_CH_SZ);
-
-	ch->magic = cpu_to_le32(UBIFS_NODE_MAGIC);
-	ch->len = cpu_to_le32(len);
-	ch->group_type = UBIFS_NO_NODE_GROUP;
-	ch->sqnum = cpu_to_le64(sqnum);
-	ch->padding[0] = ch->padding[1] = 0;
-	crc = crc32(UBIFS_CRC32_INIT, node + 8, len - 8);
-	ch->crc = cpu_to_le32(crc);
-
-	if (pad) {
-		len = ALIGN(len, 8);
-		pad = ALIGN(len, c->min_io_size) - len;
-		ubifs_pad(c, node + len, pad);
-	}
-}
-
-/**
- * ubifs_read_node - read node.
- * @c: UBIFS file-system description object
- * @buf: buffer to read to
- * @type: node type
- * @len: node length (not aligned)
- * @lnum: logical eraseblock number
- * @offs: offset within the logical eraseblock
- *
- * This function reads a node of known type and and length, checks it and
- * stores in @buf. Returns zero in case of success, %-EUCLEAN if CRC mismatched
- * and a negative error code in case of failure.
- */
-int ubifs_read_node(const struct ubifs_info *c, void *buf, int type, int len,
-		    int lnum, int offs)
-{
-	int err, l;
-	struct ubifs_ch *ch = buf;
-
-	dbg_io("LEB %d:%d, %s, length %d", lnum, offs, dbg_ntype(type), len);
-	ubifs_assert(lnum >= 0 && lnum < c->leb_cnt && offs >= 0);
-	ubifs_assert(len >= UBIFS_CH_SZ && offs + len <= c->leb_size);
-	ubifs_assert(!(offs & 7) && offs < c->leb_size);
-	ubifs_assert(type >= 0 && type < UBIFS_NODE_TYPES_CNT);
-
-	err = ubi_read(c->ubi, lnum, buf, offs, len);
-	if (err && err != -EBADMSG) {
-		ubifs_err("cannot read node %d from LEB %d:%d, error %d",
-			  type, lnum, offs, err);
-		return err;
-	}
-
-	if (type != ch->node_type) {
-		ubifs_err("bad node type (%d but expected %d)",
-			  ch->node_type, type);
-		goto out;
-	}
-
-	err = ubifs_check_node(c, buf, lnum, offs, 0, 0);
-	if (err) {
-		ubifs_err("expected node type %d", type);
-		return err;
-	}
-
-	l = le32_to_cpu(ch->len);
-	if (l != len) {
-		ubifs_err("bad node length %d, expected %d", l, len);
-		goto out;
-	}
-
-	return 0;
-
-out:
-	ubifs_err("bad node at LEB %d:%d", lnum, offs);
-	dbg_dump_node(c, buf);
-	dbg_dump_stack();
-	return -EINVAL;
-}