mirror of https://gitee.com/openkylin/linux.git
Merge git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-linus
* git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-linus: Squashfs: update email address Squashfs: add extra sanity checks at mount time Squashfs: add sanity checks to fragment reading at mount time Squashfs: add sanity checks to lookup table reading at mount time Squashfs: add sanity checks to id reading at mount time Squashfs: add sanity checks to xattr reading at mount time Squashfs: reverse order of filesystem table reading Squashfs: move table allocation into squashfs_read_table()
This commit is contained in:
Linus Torvalds
commit
bc9bc72e2f
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|
@ -6001,7 +6001,7 @@ F: Documentation/filesystems/spufs.txt
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F: arch/powerpc/platforms/cell/spufs/
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SQUASHFS FILE SYSTEM
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M: Phillip Lougher <phillip@lougher.demon.co.uk>
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M: Phillip Lougher <phillip@squashfs.org.uk>
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L: squashfs-devel@lists.sourceforge.net (subscribers-only)
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W: http://squashfs.org.uk
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S: Maintained
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|
|
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@ -2,7 +2,7 @@
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* Squashfs - a compressed read only filesystem for Linux
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*
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* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
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* Phillip Lougher <phillip@lougher.demon.co.uk>
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* Phillip Lougher <phillip@squashfs.org.uk>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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|
|
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|
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@ -2,7 +2,7 @@
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* Squashfs - a compressed read only filesystem for Linux
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*
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* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
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* Phillip Lougher <phillip@lougher.demon.co.uk>
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* Phillip Lougher <phillip@squashfs.org.uk>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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@ -393,19 +393,36 @@ struct squashfs_cache_entry *squashfs_get_datablock(struct super_block *sb,
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/*
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* Read a filesystem table (uncompressed sequence of bytes) from disk
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*/
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int squashfs_read_table(struct super_block *sb, void *buffer, u64 block,
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int length)
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void *squashfs_read_table(struct super_block *sb, u64 block, int length)
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{
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int pages = (length + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
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int i, res;
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void **data = kcalloc(pages, sizeof(void *), GFP_KERNEL);
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if (data == NULL)
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return -ENOMEM;
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void *table, *buffer, **data;
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table = buffer = kmalloc(length, GFP_KERNEL);
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if (table == NULL)
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return ERR_PTR(-ENOMEM);
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data = kcalloc(pages, sizeof(void *), GFP_KERNEL);
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if (data == NULL) {
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res = -ENOMEM;
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goto failed;
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}
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for (i = 0; i < pages; i++, buffer += PAGE_CACHE_SIZE)
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data[i] = buffer;
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res = squashfs_read_data(sb, data, block, length |
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SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, length, pages);
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kfree(data);
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return res;
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if (res < 0)
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goto failed;
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return table;
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failed:
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kfree(table);
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return ERR_PTR(res);
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}
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@ -2,7 +2,7 @@
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* Squashfs - a compressed read only filesystem for Linux
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*
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* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
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* Phillip Lougher <phillip@lougher.demon.co.uk>
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* Phillip Lougher <phillip@squashfs.org.uk>
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*
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* This program is free software; you can redistribute it and/or
|
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* modify it under the terms of the GNU General Public License
|
||||
|
|
|
|||
|
|
@ -4,7 +4,7 @@
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* Squashfs - a compressed read only filesystem for Linux
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*
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* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
|
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* Phillip Lougher <phillip@lougher.demon.co.uk>
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* Phillip Lougher <phillip@squashfs.org.uk>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
|
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|
|
|
|||
|
|
@ -2,7 +2,7 @@
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|||
* Squashfs - a compressed read only filesystem for Linux
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*
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* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
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* Phillip Lougher <phillip@lougher.demon.co.uk>
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* Phillip Lougher <phillip@squashfs.org.uk>
|
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*
|
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* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
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* Squashfs - a compressed read only filesystem for Linux
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*
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* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
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* Phillip Lougher <phillip@lougher.demon.co.uk>
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* Phillip Lougher <phillip@squashfs.org.uk>
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*
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||||
* This program is free software; you can redistribute it and/or
|
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* modify it under the terms of the GNU General Public License
|
||||
|
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@ -121,30 +121,38 @@ static struct dentry *squashfs_get_parent(struct dentry *child)
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* Read uncompressed inode lookup table indexes off disk into memory
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*/
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__le64 *squashfs_read_inode_lookup_table(struct super_block *sb,
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u64 lookup_table_start, unsigned int inodes)
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u64 lookup_table_start, u64 next_table, unsigned int inodes)
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{
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unsigned int length = SQUASHFS_LOOKUP_BLOCK_BYTES(inodes);
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__le64 *inode_lookup_table;
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int err;
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__le64 *table;
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TRACE("In read_inode_lookup_table, length %d\n", length);
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/* Allocate inode lookup table indexes */
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inode_lookup_table = kmalloc(length, GFP_KERNEL);
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if (inode_lookup_table == NULL) {
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ERROR("Failed to allocate inode lookup table\n");
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return ERR_PTR(-ENOMEM);
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/* Sanity check values */
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/* there should always be at least one inode */
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if (inodes == 0)
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return ERR_PTR(-EINVAL);
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/* length bytes should not extend into the next table - this check
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* also traps instances where lookup_table_start is incorrectly larger
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* than the next table start
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*/
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if (lookup_table_start + length > next_table)
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return ERR_PTR(-EINVAL);
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table = squashfs_read_table(sb, lookup_table_start, length);
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/*
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* table[0] points to the first inode lookup table metadata block,
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* this should be less than lookup_table_start
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*/
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if (!IS_ERR(table) && table[0] >= lookup_table_start) {
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kfree(table);
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return ERR_PTR(-EINVAL);
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}
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err = squashfs_read_table(sb, inode_lookup_table, lookup_table_start,
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length);
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if (err < 0) {
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ERROR("unable to read inode lookup table\n");
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kfree(inode_lookup_table);
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return ERR_PTR(err);
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}
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return inode_lookup_table;
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return table;
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}
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|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
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* Squashfs - a compressed read only filesystem for Linux
|
||||
*
|
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* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
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* Phillip Lougher <phillip@lougher.demon.co.uk>
|
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* Phillip Lougher <phillip@squashfs.org.uk>
|
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*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
* Squashfs - a compressed read only filesystem for Linux
|
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*
|
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* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
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* Phillip Lougher <phillip@lougher.demon.co.uk>
|
||||
* Phillip Lougher <phillip@squashfs.org.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
|
|
@ -71,26 +71,29 @@ int squashfs_frag_lookup(struct super_block *sb, unsigned int fragment,
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* Read the uncompressed fragment lookup table indexes off disk into memory
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*/
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__le64 *squashfs_read_fragment_index_table(struct super_block *sb,
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u64 fragment_table_start, unsigned int fragments)
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u64 fragment_table_start, u64 next_table, unsigned int fragments)
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{
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unsigned int length = SQUASHFS_FRAGMENT_INDEX_BYTES(fragments);
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__le64 *fragment_index;
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int err;
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__le64 *table;
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/* Allocate fragment lookup table indexes */
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fragment_index = kmalloc(length, GFP_KERNEL);
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if (fragment_index == NULL) {
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ERROR("Failed to allocate fragment index table\n");
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return ERR_PTR(-ENOMEM);
|
||||
/*
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* Sanity check, length bytes should not extend into the next table -
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* this check also traps instances where fragment_table_start is
|
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* incorrectly larger than the next table start
|
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*/
|
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if (fragment_table_start + length > next_table)
|
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return ERR_PTR(-EINVAL);
|
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|
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table = squashfs_read_table(sb, fragment_table_start, length);
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|
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/*
|
||||
* table[0] points to the first fragment table metadata block, this
|
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* should be less than fragment_table_start
|
||||
*/
|
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if (!IS_ERR(table) && table[0] >= fragment_table_start) {
|
||||
kfree(table);
|
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return ERR_PTR(-EINVAL);
|
||||
}
|
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|
||||
err = squashfs_read_table(sb, fragment_index, fragment_table_start,
|
||||
length);
|
||||
if (err < 0) {
|
||||
ERROR("unable to read fragment index table\n");
|
||||
kfree(fragment_index);
|
||||
return ERR_PTR(err);
|
||||
}
|
||||
|
||||
return fragment_index;
|
||||
return table;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
* Squashfs - a compressed read only filesystem for Linux
|
||||
*
|
||||
* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
||||
* Phillip Lougher <phillip@lougher.demon.co.uk>
|
||||
* Phillip Lougher <phillip@squashfs.org.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
|
|
@ -66,27 +66,37 @@ int squashfs_get_id(struct super_block *sb, unsigned int index,
|
|||
* Read uncompressed id lookup table indexes from disk into memory
|
||||
*/
|
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__le64 *squashfs_read_id_index_table(struct super_block *sb,
|
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u64 id_table_start, unsigned short no_ids)
|
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u64 id_table_start, u64 next_table, unsigned short no_ids)
|
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{
|
||||
unsigned int length = SQUASHFS_ID_BLOCK_BYTES(no_ids);
|
||||
__le64 *id_table;
|
||||
int err;
|
||||
__le64 *table;
|
||||
|
||||
TRACE("In read_id_index_table, length %d\n", length);
|
||||
|
||||
/* Allocate id lookup table indexes */
|
||||
id_table = kmalloc(length, GFP_KERNEL);
|
||||
if (id_table == NULL) {
|
||||
ERROR("Failed to allocate id index table\n");
|
||||
return ERR_PTR(-ENOMEM);
|
||||
/* Sanity check values */
|
||||
|
||||
/* there should always be at least one id */
|
||||
if (no_ids == 0)
|
||||
return ERR_PTR(-EINVAL);
|
||||
|
||||
/*
|
||||
* length bytes should not extend into the next table - this check
|
||||
* also traps instances where id_table_start is incorrectly larger
|
||||
* than the next table start
|
||||
*/
|
||||
if (id_table_start + length > next_table)
|
||||
return ERR_PTR(-EINVAL);
|
||||
|
||||
table = squashfs_read_table(sb, id_table_start, length);
|
||||
|
||||
/*
|
||||
* table[0] points to the first id lookup table metadata block, this
|
||||
* should be less than id_table_start
|
||||
*/
|
||||
if (!IS_ERR(table) && table[0] >= id_table_start) {
|
||||
kfree(table);
|
||||
return ERR_PTR(-EINVAL);
|
||||
}
|
||||
|
||||
err = squashfs_read_table(sb, id_table, id_table_start, length);
|
||||
if (err < 0) {
|
||||
ERROR("unable to read id index table\n");
|
||||
kfree(id_table);
|
||||
return ERR_PTR(err);
|
||||
}
|
||||
|
||||
return id_table;
|
||||
return table;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
* Squashfs - a compressed read only filesystem for Linux
|
||||
*
|
||||
* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
||||
* Phillip Lougher <phillip@lougher.demon.co.uk>
|
||||
* Phillip Lougher <phillip@squashfs.org.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
* Squashfs - a compressed read only filesystem for Linux
|
||||
*
|
||||
* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
||||
* Phillip Lougher <phillip@lougher.demon.co.uk>
|
||||
* Phillip Lougher <phillip@squashfs.org.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
* Squashfs - a compressed read only filesystem for Linux
|
||||
*
|
||||
* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
||||
* Phillip Lougher <phillip@lougher.demon.co.uk>
|
||||
* Phillip Lougher <phillip@squashfs.org.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
|
|
@ -44,24 +44,24 @@ extern struct squashfs_cache_entry *squashfs_get_fragment(struct super_block *,
|
|||
u64, int);
|
||||
extern struct squashfs_cache_entry *squashfs_get_datablock(struct super_block *,
|
||||
u64, int);
|
||||
extern int squashfs_read_table(struct super_block *, void *, u64, int);
|
||||
extern void *squashfs_read_table(struct super_block *, u64, int);
|
||||
|
||||
/* decompressor.c */
|
||||
extern const struct squashfs_decompressor *squashfs_lookup_decompressor(int);
|
||||
extern void *squashfs_decompressor_init(struct super_block *, unsigned short);
|
||||
|
||||
/* export.c */
|
||||
extern __le64 *squashfs_read_inode_lookup_table(struct super_block *, u64,
|
||||
extern __le64 *squashfs_read_inode_lookup_table(struct super_block *, u64, u64,
|
||||
unsigned int);
|
||||
|
||||
/* fragment.c */
|
||||
extern int squashfs_frag_lookup(struct super_block *, unsigned int, u64 *);
|
||||
extern __le64 *squashfs_read_fragment_index_table(struct super_block *,
|
||||
u64, unsigned int);
|
||||
u64, u64, unsigned int);
|
||||
|
||||
/* id.c */
|
||||
extern int squashfs_get_id(struct super_block *, unsigned int, unsigned int *);
|
||||
extern __le64 *squashfs_read_id_index_table(struct super_block *, u64,
|
||||
extern __le64 *squashfs_read_id_index_table(struct super_block *, u64, u64,
|
||||
unsigned short);
|
||||
|
||||
/* inode.c */
|
||||
|
|
|
|||
|
|
@ -4,7 +4,7 @@
|
|||
* Squashfs
|
||||
*
|
||||
* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
||||
* Phillip Lougher <phillip@lougher.demon.co.uk>
|
||||
* Phillip Lougher <phillip@squashfs.org.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
|
|
|
|||
|
|
@ -4,7 +4,7 @@
|
|||
* Squashfs
|
||||
*
|
||||
* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
||||
* Phillip Lougher <phillip@lougher.demon.co.uk>
|
||||
* Phillip Lougher <phillip@squashfs.org.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
|
|
|
|||
|
|
@ -4,7 +4,7 @@
|
|||
* Squashfs
|
||||
*
|
||||
* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
||||
* Phillip Lougher <phillip@lougher.demon.co.uk>
|
||||
* Phillip Lougher <phillip@squashfs.org.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
* Squashfs - a compressed read only filesystem for Linux
|
||||
*
|
||||
* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
||||
* Phillip Lougher <phillip@lougher.demon.co.uk>
|
||||
* Phillip Lougher <phillip@squashfs.org.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
|
|
@ -83,7 +83,7 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent)
|
|||
long long root_inode;
|
||||
unsigned short flags;
|
||||
unsigned int fragments;
|
||||
u64 lookup_table_start, xattr_id_table_start;
|
||||
u64 lookup_table_start, xattr_id_table_start, next_table;
|
||||
int err;
|
||||
|
||||
TRACE("Entered squashfs_fill_superblock\n");
|
||||
|
|
@ -95,12 +95,6 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent)
|
|||
}
|
||||
msblk = sb->s_fs_info;
|
||||
|
||||
sblk = kzalloc(sizeof(*sblk), GFP_KERNEL);
|
||||
if (sblk == NULL) {
|
||||
ERROR("Failed to allocate squashfs_super_block\n");
|
||||
goto failure;
|
||||
}
|
||||
|
||||
msblk->devblksize = sb_min_blocksize(sb, BLOCK_SIZE);
|
||||
msblk->devblksize_log2 = ffz(~msblk->devblksize);
|
||||
|
||||
|
|
@ -114,10 +108,12 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent)
|
|||
* of bytes_used) we need to set it to an initial sensible dummy value
|
||||
*/
|
||||
msblk->bytes_used = sizeof(*sblk);
|
||||
err = squashfs_read_table(sb, sblk, SQUASHFS_START, sizeof(*sblk));
|
||||
sblk = squashfs_read_table(sb, SQUASHFS_START, sizeof(*sblk));
|
||||
|
||||
if (err < 0) {
|
||||
if (IS_ERR(sblk)) {
|
||||
ERROR("unable to read squashfs_super_block\n");
|
||||
err = PTR_ERR(sblk);
|
||||
sblk = NULL;
|
||||
goto failed_mount;
|
||||
}
|
||||
|
||||
|
|
@ -218,18 +214,61 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent)
|
|||
goto failed_mount;
|
||||
}
|
||||
|
||||
/* Handle xattrs */
|
||||
sb->s_xattr = squashfs_xattr_handlers;
|
||||
xattr_id_table_start = le64_to_cpu(sblk->xattr_id_table_start);
|
||||
if (xattr_id_table_start == SQUASHFS_INVALID_BLK) {
|
||||
next_table = msblk->bytes_used;
|
||||
goto allocate_id_index_table;
|
||||
}
|
||||
|
||||
/* Allocate and read xattr id lookup table */
|
||||
msblk->xattr_id_table = squashfs_read_xattr_id_table(sb,
|
||||
xattr_id_table_start, &msblk->xattr_table, &msblk->xattr_ids);
|
||||
if (IS_ERR(msblk->xattr_id_table)) {
|
||||
ERROR("unable to read xattr id index table\n");
|
||||
err = PTR_ERR(msblk->xattr_id_table);
|
||||
msblk->xattr_id_table = NULL;
|
||||
if (err != -ENOTSUPP)
|
||||
goto failed_mount;
|
||||
}
|
||||
next_table = msblk->xattr_table;
|
||||
|
||||
allocate_id_index_table:
|
||||
/* Allocate and read id index table */
|
||||
msblk->id_table = squashfs_read_id_index_table(sb,
|
||||
le64_to_cpu(sblk->id_table_start), le16_to_cpu(sblk->no_ids));
|
||||
le64_to_cpu(sblk->id_table_start), next_table,
|
||||
le16_to_cpu(sblk->no_ids));
|
||||
if (IS_ERR(msblk->id_table)) {
|
||||
ERROR("unable to read id index table\n");
|
||||
err = PTR_ERR(msblk->id_table);
|
||||
msblk->id_table = NULL;
|
||||
goto failed_mount;
|
||||
}
|
||||
next_table = msblk->id_table[0];
|
||||
|
||||
/* Handle inode lookup table */
|
||||
lookup_table_start = le64_to_cpu(sblk->lookup_table_start);
|
||||
if (lookup_table_start == SQUASHFS_INVALID_BLK)
|
||||
goto handle_fragments;
|
||||
|
||||
/* Allocate and read inode lookup table */
|
||||
msblk->inode_lookup_table = squashfs_read_inode_lookup_table(sb,
|
||||
lookup_table_start, next_table, msblk->inodes);
|
||||
if (IS_ERR(msblk->inode_lookup_table)) {
|
||||
ERROR("unable to read inode lookup table\n");
|
||||
err = PTR_ERR(msblk->inode_lookup_table);
|
||||
msblk->inode_lookup_table = NULL;
|
||||
goto failed_mount;
|
||||
}
|
||||
next_table = msblk->inode_lookup_table[0];
|
||||
|
||||
sb->s_export_op = &squashfs_export_ops;
|
||||
|
||||
handle_fragments:
|
||||
fragments = le32_to_cpu(sblk->fragments);
|
||||
if (fragments == 0)
|
||||
goto allocate_lookup_table;
|
||||
goto check_directory_table;
|
||||
|
||||
msblk->fragment_cache = squashfs_cache_init("fragment",
|
||||
SQUASHFS_CACHED_FRAGMENTS, msblk->block_size);
|
||||
|
|
@ -240,45 +279,29 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent)
|
|||
|
||||
/* Allocate and read fragment index table */
|
||||
msblk->fragment_index = squashfs_read_fragment_index_table(sb,
|
||||
le64_to_cpu(sblk->fragment_table_start), fragments);
|
||||
le64_to_cpu(sblk->fragment_table_start), next_table, fragments);
|
||||
if (IS_ERR(msblk->fragment_index)) {
|
||||
ERROR("unable to read fragment index table\n");
|
||||
err = PTR_ERR(msblk->fragment_index);
|
||||
msblk->fragment_index = NULL;
|
||||
goto failed_mount;
|
||||
}
|
||||
next_table = msblk->fragment_index[0];
|
||||
|
||||
allocate_lookup_table:
|
||||
lookup_table_start = le64_to_cpu(sblk->lookup_table_start);
|
||||
if (lookup_table_start == SQUASHFS_INVALID_BLK)
|
||||
goto allocate_xattr_table;
|
||||
|
||||
/* Allocate and read inode lookup table */
|
||||
msblk->inode_lookup_table = squashfs_read_inode_lookup_table(sb,
|
||||
lookup_table_start, msblk->inodes);
|
||||
if (IS_ERR(msblk->inode_lookup_table)) {
|
||||
err = PTR_ERR(msblk->inode_lookup_table);
|
||||
msblk->inode_lookup_table = NULL;
|
||||
check_directory_table:
|
||||
/* Sanity check directory_table */
|
||||
if (msblk->directory_table >= next_table) {
|
||||
err = -EINVAL;
|
||||
goto failed_mount;
|
||||
}
|
||||
|
||||
sb->s_export_op = &squashfs_export_ops;
|
||||
|
||||
allocate_xattr_table:
|
||||
sb->s_xattr = squashfs_xattr_handlers;
|
||||
xattr_id_table_start = le64_to_cpu(sblk->xattr_id_table_start);
|
||||
if (xattr_id_table_start == SQUASHFS_INVALID_BLK)
|
||||
goto allocate_root;
|
||||
|
||||
/* Allocate and read xattr id lookup table */
|
||||
msblk->xattr_id_table = squashfs_read_xattr_id_table(sb,
|
||||
xattr_id_table_start, &msblk->xattr_table, &msblk->xattr_ids);
|
||||
if (IS_ERR(msblk->xattr_id_table)) {
|
||||
err = PTR_ERR(msblk->xattr_id_table);
|
||||
msblk->xattr_id_table = NULL;
|
||||
if (err != -ENOTSUPP)
|
||||
goto failed_mount;
|
||||
/* Sanity check inode_table */
|
||||
if (msblk->inode_table >= msblk->directory_table) {
|
||||
err = -EINVAL;
|
||||
goto failed_mount;
|
||||
}
|
||||
allocate_root:
|
||||
|
||||
/* allocate root */
|
||||
root = new_inode(sb);
|
||||
if (!root) {
|
||||
err = -ENOMEM;
|
||||
|
|
@ -318,11 +341,6 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent)
|
|||
sb->s_fs_info = NULL;
|
||||
kfree(sblk);
|
||||
return err;
|
||||
|
||||
failure:
|
||||
kfree(sb->s_fs_info);
|
||||
sb->s_fs_info = NULL;
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -475,5 +493,5 @@ static const struct super_operations squashfs_super_ops = {
|
|||
module_init(init_squashfs_fs);
|
||||
module_exit(exit_squashfs_fs);
|
||||
MODULE_DESCRIPTION("squashfs 4.0, a compressed read-only filesystem");
|
||||
MODULE_AUTHOR("Phillip Lougher <phillip@lougher.demon.co.uk>");
|
||||
MODULE_AUTHOR("Phillip Lougher <phillip@squashfs.org.uk>");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
* Squashfs - a compressed read only filesystem for Linux
|
||||
*
|
||||
* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
||||
* Phillip Lougher <phillip@lougher.demon.co.uk>
|
||||
* Phillip Lougher <phillip@squashfs.org.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
* Squashfs - a compressed read only filesystem for Linux
|
||||
*
|
||||
* Copyright (c) 2010
|
||||
* Phillip Lougher <phillip@lougher.demon.co.uk>
|
||||
* Phillip Lougher <phillip@squashfs.org.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
* Squashfs - a compressed read only filesystem for Linux
|
||||
*
|
||||
* Copyright (c) 2010
|
||||
* Phillip Lougher <phillip@lougher.demon.co.uk>
|
||||
* Phillip Lougher <phillip@squashfs.org.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
|
|
@ -31,6 +31,7 @@ static inline __le64 *squashfs_read_xattr_id_table(struct super_block *sb,
|
|||
u64 start, u64 *xattr_table_start, int *xattr_ids)
|
||||
{
|
||||
ERROR("Xattrs in filesystem, these will be ignored\n");
|
||||
*xattr_table_start = start;
|
||||
return ERR_PTR(-ENOTSUPP);
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
* Squashfs - a compressed read only filesystem for Linux
|
||||
*
|
||||
* Copyright (c) 2010
|
||||
* Phillip Lougher <phillip@lougher.demon.co.uk>
|
||||
* Phillip Lougher <phillip@squashfs.org.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
|
|
@ -67,34 +67,29 @@ __le64 *squashfs_read_xattr_id_table(struct super_block *sb, u64 start,
|
|||
u64 *xattr_table_start, int *xattr_ids)
|
||||
{
|
||||
unsigned int len;
|
||||
__le64 *xid_table;
|
||||
struct squashfs_xattr_id_table id_table;
|
||||
int err;
|
||||
struct squashfs_xattr_id_table *id_table;
|
||||
|
||||
id_table = squashfs_read_table(sb, start, sizeof(*id_table));
|
||||
if (IS_ERR(id_table))
|
||||
return (__le64 *) id_table;
|
||||
|
||||
*xattr_table_start = le64_to_cpu(id_table->xattr_table_start);
|
||||
*xattr_ids = le32_to_cpu(id_table->xattr_ids);
|
||||
kfree(id_table);
|
||||
|
||||
/* Sanity check values */
|
||||
|
||||
/* there is always at least one xattr id */
|
||||
if (*xattr_ids == 0)
|
||||
return ERR_PTR(-EINVAL);
|
||||
|
||||
/* xattr_table should be less than start */
|
||||
if (*xattr_table_start >= start)
|
||||
return ERR_PTR(-EINVAL);
|
||||
|
||||
err = squashfs_read_table(sb, &id_table, start, sizeof(id_table));
|
||||
if (err < 0) {
|
||||
ERROR("unable to read xattr id table\n");
|
||||
return ERR_PTR(err);
|
||||
}
|
||||
*xattr_table_start = le64_to_cpu(id_table.xattr_table_start);
|
||||
*xattr_ids = le32_to_cpu(id_table.xattr_ids);
|
||||
len = SQUASHFS_XATTR_BLOCK_BYTES(*xattr_ids);
|
||||
|
||||
TRACE("In read_xattr_index_table, length %d\n", len);
|
||||
|
||||
/* Allocate xattr id lookup table indexes */
|
||||
xid_table = kmalloc(len, GFP_KERNEL);
|
||||
if (xid_table == NULL) {
|
||||
ERROR("Failed to allocate xattr id index table\n");
|
||||
return ERR_PTR(-ENOMEM);
|
||||
}
|
||||
|
||||
err = squashfs_read_table(sb, xid_table, start + sizeof(id_table), len);
|
||||
if (err < 0) {
|
||||
ERROR("unable to read xattr id index table\n");
|
||||
kfree(xid_table);
|
||||
return ERR_PTR(err);
|
||||
}
|
||||
|
||||
return xid_table;
|
||||
return squashfs_read_table(sb, start + sizeof(*id_table), len);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
* Squashfs - a compressed read only filesystem for Linux
|
||||
*
|
||||
* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
|
||||
* Phillip Lougher <phillip@lougher.demon.co.uk>
|
||||
* Phillip Lougher <phillip@squashfs.org.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
* Squashfs - a compressed read only filesystem for Linux
|
||||
*
|
||||
* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
|
||||
* Phillip Lougher <phillip@lougher.demon.co.uk>
|
||||
* Phillip Lougher <phillip@squashfs.org.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
|
|
|
|||
Loading…
Reference in New Issue