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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/fs/squashfs/id.c | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
download | FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2 FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip |
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.c | 102 |
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; -} |