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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/fs/squashfs/id.c
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/fs/squashfs/id.c')
-rw-r--r--ANDROID_3.4.5/fs/squashfs/id.c102
1 files changed, 0 insertions, 102 deletions
diff --git a/ANDROID_3.4.5/fs/squashfs/id.c b/ANDROID_3.4.5/fs/squashfs/id.c
deleted file mode 100644
index d38ea3da..00000000
--- a/ANDROID_3.4.5/fs/squashfs/id.c
+++ /dev/null
@@ -1,102 +0,0 @@
-/*
- * Squashfs - a compressed read only filesystem for Linux
- *
- * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
- * 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
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- * id.c
- */
-
-/*
- * This file implements code to handle uids and gids.
- *
- * For space efficiency regular files store uid and gid indexes, which are
- * converted to 32-bit uids/gids using an id look up table. This table is
- * stored compressed into metadata blocks. A second index table is used to
- * locate these. This second index table for speed of access (and because it
- * is small) is read at mount time and cached in memory.
- */
-
-#include <linux/fs.h>
-#include <linux/vfs.h>
-#include <linux/slab.h>
-
-#include "squashfs_fs.h"
-#include "squashfs_fs_sb.h"
-#include "squashfs.h"
-
-/*
- * Map uid/gid index into real 32-bit uid/gid using the id look up table
- */
-int squashfs_get_id(struct super_block *sb, unsigned int index,
- unsigned int *id)
-{
- struct squashfs_sb_info *msblk = sb->s_fs_info;
- int block = SQUASHFS_ID_BLOCK(index);
- int offset = SQUASHFS_ID_BLOCK_OFFSET(index);
- u64 start_block = le64_to_cpu(msblk->id_table[block]);
- __le32 disk_id;
- int err;
-
- err = squashfs_read_metadata(sb, &disk_id, &start_block, &offset,
- sizeof(disk_id));
- if (err < 0)
- return err;
-
- *id = le32_to_cpu(disk_id);
- return 0;
-}
-
-
-/*
- * Read uncompressed id lookup table indexes from disk into memory
- */
-__le64 *squashfs_read_id_index_table(struct super_block *sb,
- u64 id_table_start, u64 next_table, unsigned short no_ids)
-{
- unsigned int length = SQUASHFS_ID_BLOCK_BYTES(no_ids);
- __le64 *table;
-
- TRACE("In read_id_index_table, length %d\n", length);
-
- /* 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) && le64_to_cpu(table[0]) >= id_table_start) {
- kfree(table);
- return ERR_PTR(-EINVAL);
- }
-
- return table;
-}