11f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher/* 21f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher * Squashfs - a compressed read only filesystem for Linux 31f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher * 4f1a0e7f69b4afccca1ea323ca2e46bb1d63181daplougher * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008 5f6cd337f8de328e2b448b9f29c00d9132748f7feplougher * Phillip Lougher <phillip@lougher.demon.co.uk> 61f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher * 71f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher * This program is free software; you can redistribute it and/or 81f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher * modify it under the terms of the GNU General Public License 91f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher * as published by the Free Software Foundation; either version 2, 101f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher * or (at your option) any later version. 111f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher * 121f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher * This program is distributed in the hope that it will be useful, 131f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher * but WITHOUT ANY WARRANTY; without even the implied warranty of 141f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 151f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher * GNU General Public License for more details. 161f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher * 171f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher * You should have received a copy of the GNU General Public License 181f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher * along with this program; if not, write to the Free Software 19a3e28ecaf227d2c03ec6724dd718e3c5a12b74efplougher * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 201f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher * 211f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher * inode.c 221f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher */ 231f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher 24ada1ec7413911595ccef5a9c458ae9a0e73e23f2plougher/* 25ada1ec7413911595ccef5a9c458ae9a0e73e23f2plougher * This file implements code to create and read inodes from disk. 26ada1ec7413911595ccef5a9c458ae9a0e73e23f2plougher * 27ada1ec7413911595ccef5a9c458ae9a0e73e23f2plougher * Inodes in Squashfs are identified by a 48-bit inode which encodes the 28ada1ec7413911595ccef5a9c458ae9a0e73e23f2plougher * location of the compressed metadata block containing the inode, and the byte 2907e0310c61c277c87523afcf136e028524e24686plougher * offset into that block where the inode is placed (<block, offset>). 30ada1ec7413911595ccef5a9c458ae9a0e73e23f2plougher * 31ada1ec7413911595ccef5a9c458ae9a0e73e23f2plougher * To maximise compression there are different inodes for each file type 32ada1ec7413911595ccef5a9c458ae9a0e73e23f2plougher * (regular file, directory, device, etc.), the inode contents and length 33ada1ec7413911595ccef5a9c458ae9a0e73e23f2plougher * varying with the type. 34ada1ec7413911595ccef5a9c458ae9a0e73e23f2plougher * 35ada1ec7413911595ccef5a9c458ae9a0e73e23f2plougher * To further maximise compression, two types of regular file inode and 36ada1ec7413911595ccef5a9c458ae9a0e73e23f2plougher * directory inode are defined: inodes optimised for frequently occurring 37ada1ec7413911595ccef5a9c458ae9a0e73e23f2plougher * regular files and directories, and extended types where extra 38ada1ec7413911595ccef5a9c458ae9a0e73e23f2plougher * information has to be stored. 39ada1ec7413911595ccef5a9c458ae9a0e73e23f2plougher */ 40ada1ec7413911595ccef5a9c458ae9a0e73e23f2plougher 411f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher#include <linux/fs.h> 42618f0d4fd2bc599903287b625ed940fec1908f15plougher#include <linux/vfs.h> 43618f0d4fd2bc599903287b625ed940fec1908f15plougher#include <linux/zlib.h> 441f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher 45a70c1cc4b995d559bcbdf2d3dda88c5bd1292c32plougher#include "squashfs_fs.h" 46a70c1cc4b995d559bcbdf2d3dda88c5bd1292c32plougher#include "squashfs_fs_sb.h" 47a70c1cc4b995d559bcbdf2d3dda88c5bd1292c32plougher#include "squashfs_fs_i.h" 481f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher#include "squashfs.h" 491f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher 50824cff29fd798cbd6cbfa18d93751c51ceabbd7fplougher/* 51824cff29fd798cbd6cbfa18d93751c51ceabbd7fplougher * Initialise VFS inode with the base inode information common to all 52b4512449664177d1efa2b45fa75ad8f833067fe6plougher * Squashfs inode types. Sqsh_ino contains the unswapped base inode 53824cff29fd798cbd6cbfa18d93751c51ceabbd7fplougher * off disk. 54824cff29fd798cbd6cbfa18d93751c51ceabbd7fplougher */ 552c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougherstatic int squashfs_new_inode(struct super_block *sb, struct inode *inode, 5676f489f44f7082158ac125800bf941f1c7e8466dplougher struct squashfs_base_inode *sqsh_ino) 571f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher{ 58d02958dbfa047db2b8c8b22209be21822b4a8015plougher int err; 59d02958dbfa047db2b8c8b22209be21822b4a8015plougher 6076f489f44f7082158ac125800bf941f1c7e8466dplougher err = squashfs_get_id(sb, le16_to_cpu(sqsh_ino->uid), &inode->i_uid); 61d02958dbfa047db2b8c8b22209be21822b4a8015plougher if (err) 62171e3df917d22af3d8e5caff56c3665f626d96f4plougher return err; 63d02958dbfa047db2b8c8b22209be21822b4a8015plougher 6476f489f44f7082158ac125800bf941f1c7e8466dplougher err = squashfs_get_id(sb, le16_to_cpu(sqsh_ino->guid), &inode->i_gid); 6517f4c6f13075c74c7a4f3f3388c822b9f516b892plougher if (err) 66171e3df917d22af3d8e5caff56c3665f626d96f4plougher return err; 671b899fc316f7eba7a31da12dc0c9b69ada441059plougher 6876f489f44f7082158ac125800bf941f1c7e8466dplougher inode->i_ino = le32_to_cpu(sqsh_ino->inode_number); 6976f489f44f7082158ac125800bf941f1c7e8466dplougher inode->i_mtime.tv_sec = le32_to_cpu(sqsh_ino->mtime); 702c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_atime.tv_sec = inode->i_mtime.tv_sec; 712c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_ctime.tv_sec = inode->i_mtime.tv_sec; 7276f489f44f7082158ac125800bf941f1c7e8466dplougher inode->i_mode = le16_to_cpu(sqsh_ino->mode); 732c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_size = 0; 74f883328db75b0c06474130d1ca8566b96ed4b23fplougher 75d02958dbfa047db2b8c8b22209be21822b4a8015plougher return err; 7629e5f570cf51b2f15079a81aec8cf1595f3082cfplougher} 7729e5f570cf51b2f15079a81aec8cf1595f3082cfplougher 7829e5f570cf51b2f15079a81aec8cf1595f3082cfplougher 792c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougherstruct inode *squashfs_iget(struct super_block *sb, long long ino, 802c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher unsigned int ino_number) 8129e5f570cf51b2f15079a81aec8cf1595f3082cfplougher{ 822c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher struct inode *inode = iget_locked(sb, ino_number); 8317f4c6f13075c74c7a4f3f3388c822b9f516b892plougher int err; 8429e5f570cf51b2f15079a81aec8cf1595f3082cfplougher 8529e5f570cf51b2f15079a81aec8cf1595f3082cfplougher TRACE("Entered squashfs_iget\n"); 8629e5f570cf51b2f15079a81aec8cf1595f3082cfplougher 872c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher if (!inode) 8817f4c6f13075c74c7a4f3f3388c822b9f516b892plougher return ERR_PTR(-ENOMEM); 892c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher if (!(inode->i_state & I_NEW)) 902c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher return inode; 9117f4c6f13075c74c7a4f3f3388c822b9f516b892plougher 922c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher err = squashfs_read_inode(inode, ino); 9317f4c6f13075c74c7a4f3f3388c822b9f516b892plougher if (err) { 942c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher iget_failed(inode); 9517f4c6f13075c74c7a4f3f3388c822b9f516b892plougher return ERR_PTR(err); 961f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher } 971f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher 982c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher unlock_new_inode(inode); 992c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher return inode; 1001f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher} 1011f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher 1021f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher 103824cff29fd798cbd6cbfa18d93751c51ceabbd7fplougher/* 104824cff29fd798cbd6cbfa18d93751c51ceabbd7fplougher * Initialise VFS inode by reading inode from inode table (compressed 105824cff29fd798cbd6cbfa18d93751c51ceabbd7fplougher * metadata). The format and amount of data read depends on type. 106824cff29fd798cbd6cbfa18d93751c51ceabbd7fplougher */ 1072c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougherint squashfs_read_inode(struct inode *inode, long long ino) 1081f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher{ 1092c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher struct super_block *sb = inode->i_sb; 1109c4c7427428c91814172752d48b8aa3b80397e2dplougher struct squashfs_sb_info *msblk = sb->s_fs_info; 111f006b96e65d7092838983913afbd69fd8199d793plougher u64 block = SQUASHFS_INODE_BLK(ino) + msblk->inode_table; 112532f06823c68342cf869a8a0999ef6c105a4555aplougher int err, type, offset = SQUASHFS_INODE_OFFSET(ino); 1132c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher union squashfs_inode squashfs_ino; 114532f06823c68342cf869a8a0999ef6c105a4555aplougher struct squashfs_base_inode *sqshb_ino = &squashfs_ino.base; 1151f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher 11629e5f570cf51b2f15079a81aec8cf1595f3082cfplougher TRACE("Entered squashfs_read_inode\n"); 1171f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher 118824cff29fd798cbd6cbfa18d93751c51ceabbd7fplougher /* 119824cff29fd798cbd6cbfa18d93751c51ceabbd7fplougher * Read inode base common to all inode types. 120824cff29fd798cbd6cbfa18d93751c51ceabbd7fplougher */ 121532f06823c68342cf869a8a0999ef6c105a4555aplougher err = squashfs_read_metadata(sb, sqshb_ino, &block, 122532f06823c68342cf869a8a0999ef6c105a4555aplougher &offset, sizeof(*sqshb_ino)); 12342d43d8a5d236bdae90e04b241ef5db631904ebfplougher if (err < 0) 124d890ad546bb9b674875a7119355237d85bfe1604plougher goto failed_read; 1251f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher 126532f06823c68342cf869a8a0999ef6c105a4555aplougher err = squashfs_new_inode(sb, inode, sqshb_ino); 127d02958dbfa047db2b8c8b22209be21822b4a8015plougher if (err) 128d02958dbfa047db2b8c8b22209be21822b4a8015plougher goto failed_read; 12929e5f570cf51b2f15079a81aec8cf1595f3082cfplougher 1301aef9e4f12365714fd95ac9a7a059ea4c7d6d846plougher block = SQUASHFS_INODE_BLK(ino) + msblk->inode_table; 1312c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher offset = SQUASHFS_INODE_OFFSET(ino); 132bfffe327332facc323af287277f68fe905ce7a8aplougher 133532f06823c68342cf869a8a0999ef6c105a4555aplougher type = le16_to_cpu(sqshb_ino->inode_type); 134768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher switch (type) { 135183b4ee6320030ce1bd8980757c42071779973bcplougher case SQUASHFS_REG_TYPE: { 136aa8f1f99a33f5219b5e8b6b9a864084bf1c963e1plougher unsigned int frag_offset, frag_size, frag; 137f006b96e65d7092838983913afbd69fd8199d793plougher u64 frag_blk; 1382c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher struct squashfs_reg_inode *sqsh_ino = &squashfs_ino.reg; 139768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher 1402c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher err = squashfs_read_metadata(sb, sqsh_ino, &block, &offset, 1412c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher sizeof(*sqsh_ino)); 14242d43d8a5d236bdae90e04b241ef5db631904ebfplougher if (err < 0) 143768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher goto failed_read; 1441f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher 1452c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher frag = le32_to_cpu(sqsh_ino->fragment); 146768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher if (frag != SQUASHFS_INVALID_FRAG) { 1472c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher frag_offset = le32_to_cpu(sqsh_ino->offset); 148ae3b69db4fbe588ccca42ab0204d063c0ef8ecddplougher frag_size = squashfs_frag_lookup(sb, frag, &frag_blk); 14917f4c6f13075c74c7a4f3f3388c822b9f516b892plougher if (frag_size < 0) { 15017f4c6f13075c74c7a4f3f3388c822b9f516b892plougher err = frag_size; 151d890ad546bb9b674875a7119355237d85bfe1604plougher goto failed_read; 15217f4c6f13075c74c7a4f3f3388c822b9f516b892plougher } 153768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher } else { 154768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher frag_blk = SQUASHFS_INVALID_BLK; 155768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher frag_size = 0; 156aa8f1f99a33f5219b5e8b6b9a864084bf1c963e1plougher frag_offset = 0; 1571f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher } 1581f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher 1592c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_nlink = 1; 1602c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_size = le32_to_cpu(sqsh_ino->file_size); 1612c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_fop = &generic_ro_fops; 1622c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_mode |= S_IFREG; 1632c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_blocks = ((inode->i_size - 1) >> 9) + 1; 1645921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->fragment_block = frag_blk; 1655921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->fragment_size = frag_size; 1665921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->fragment_offset = frag_offset; 1675921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->start = le32_to_cpu(sqsh_ino->start_block); 1685921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->block_list_start = block; 1695921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->offset = offset; 1702c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_data.a_ops = &squashfs_aops; 171768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher 172768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher TRACE("File inode %x:%x, start_block %llx, block_list_start " 1732c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher "%llx, offset %x\n", SQUASHFS_INODE_BLK(ino), 1745921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher offset, squashfs_i(inode)->start, block, offset); 175768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher break; 176768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher } 177768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher case SQUASHFS_LREG_TYPE: { 178aa8f1f99a33f5219b5e8b6b9a864084bf1c963e1plougher unsigned int frag_offset, frag_size, frag; 179f006b96e65d7092838983913afbd69fd8199d793plougher u64 frag_blk; 1802c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher struct squashfs_lreg_inode *sqsh_ino = &squashfs_ino.lreg; 1811f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher 1822c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher err = squashfs_read_metadata(sb, sqsh_ino, &block, &offset, 1832c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher sizeof(*sqsh_ino)); 18442d43d8a5d236bdae90e04b241ef5db631904ebfplougher if (err < 0) 185768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher goto failed_read; 1861f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher 1872c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher frag = le32_to_cpu(sqsh_ino->fragment); 188768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher if (frag != SQUASHFS_INVALID_FRAG) { 1892c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher frag_offset = le32_to_cpu(sqsh_ino->offset); 190ae3b69db4fbe588ccca42ab0204d063c0ef8ecddplougher frag_size = squashfs_frag_lookup(sb, frag, &frag_blk); 19117f4c6f13075c74c7a4f3f3388c822b9f516b892plougher if (frag_size < 0) { 19217f4c6f13075c74c7a4f3f3388c822b9f516b892plougher err = frag_size; 193d890ad546bb9b674875a7119355237d85bfe1604plougher goto failed_read; 19417f4c6f13075c74c7a4f3f3388c822b9f516b892plougher } 195768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher } else { 196768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher frag_blk = SQUASHFS_INVALID_BLK; 197768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher frag_size = 0; 198aa8f1f99a33f5219b5e8b6b9a864084bf1c963e1plougher frag_offset = 0; 1991f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher } 2001f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher 2012c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_nlink = le32_to_cpu(sqsh_ino->nlink); 2022c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_size = le64_to_cpu(sqsh_ino->file_size); 2032c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_fop = &generic_ro_fops; 2042c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_mode |= S_IFREG; 2052c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_blocks = ((inode->i_size - 2062c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher le64_to_cpu(sqsh_ino->sparse) - 1) >> 9) + 1; 2072c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher 2085921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->fragment_block = frag_blk; 2095921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->fragment_size = frag_size; 2105921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->fragment_offset = frag_offset; 2115921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->start = le64_to_cpu(sqsh_ino->start_block); 2125921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->block_list_start = block; 2135921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->offset = offset; 2142c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_data.a_ops = &squashfs_aops; 215768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher 216768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher TRACE("File inode %x:%x, start_block %llx, block_list_start " 2172c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher "%llx, offset %x\n", SQUASHFS_INODE_BLK(ino), 2185921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher offset, squashfs_i(inode)->start, block, offset); 219768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher break; 220768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher } 221768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher case SQUASHFS_DIR_TYPE: { 2222c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher struct squashfs_dir_inode *sqsh_ino = &squashfs_ino.dir; 2231f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher 2242c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher err = squashfs_read_metadata(sb, sqsh_ino, &block, &offset, 2252c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher sizeof(*sqsh_ino)); 22642d43d8a5d236bdae90e04b241ef5db631904ebfplougher if (err < 0) 227768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher goto failed_read; 2281f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher 2292c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_nlink = le32_to_cpu(sqsh_ino->nlink); 2302c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_size = le16_to_cpu(sqsh_ino->file_size); 2312c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_op = &squashfs_dir_inode_ops; 2322c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_fop = &squashfs_dir_ops; 2332c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_mode |= S_IFDIR; 2345921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->start = le32_to_cpu(sqsh_ino->start_block); 2355921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->offset = le16_to_cpu(sqsh_ino->offset); 2365921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->dir_idx_cnt = 0; 2375921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->parent = le32_to_cpu(sqsh_ino->parent_inode); 238768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher 239768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher TRACE("Directory inode %x:%x, start_block %llx, offset %x\n", 2409c25f9e157d0c783e400fc46ca04b699d0b4b16eplougher SQUASHFS_INODE_BLK(ino), offset, 2415921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->start, 2422c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher le16_to_cpu(sqsh_ino->offset)); 243768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher break; 2441f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher } 245768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher case SQUASHFS_LDIR_TYPE: { 2462c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher struct squashfs_ldir_inode *sqsh_ino = &squashfs_ino.ldir; 247768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher 2482c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher err = squashfs_read_metadata(sb, sqsh_ino, &block, &offset, 2492c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher sizeof(*sqsh_ino)); 25042d43d8a5d236bdae90e04b241ef5db631904ebfplougher if (err < 0) 251768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher goto failed_read; 252768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher 2532c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_nlink = le32_to_cpu(sqsh_ino->nlink); 2542c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_size = le32_to_cpu(sqsh_ino->file_size); 2552c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_op = &squashfs_dir_inode_ops; 2562c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_fop = &squashfs_dir_ops; 2572c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_mode |= S_IFDIR; 2585921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->start = le32_to_cpu(sqsh_ino->start_block); 2595921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->offset = le16_to_cpu(sqsh_ino->offset); 2605921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->dir_idx_start = block; 2615921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->dir_idx_offset = offset; 2625921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->dir_idx_cnt = le16_to_cpu(sqsh_ino->i_count); 2635921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->parent = le32_to_cpu(sqsh_ino->parent_inode); 264768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher 265768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher TRACE("Long directory inode %x:%x, start_block %llx, offset " 2662c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher "%x\n", SQUASHFS_INODE_BLK(ino), offset, 2675921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->start, 2682c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher le16_to_cpu(sqsh_ino->offset)); 269768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher break; 270768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher } 2719fca346e286002f3e0db6201923b538a740c78b4plougher case SQUASHFS_SYMLINK_TYPE: 2729fca346e286002f3e0db6201923b538a740c78b4plougher case SQUASHFS_LSYMLINK_TYPE: { 2732c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher struct squashfs_symlink_inode *sqsh_ino = &squashfs_ino.symlink; 274768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher 2752c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher err = squashfs_read_metadata(sb, sqsh_ino, &block, &offset, 2762c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher sizeof(*sqsh_ino)); 27742d43d8a5d236bdae90e04b241ef5db631904ebfplougher if (err < 0) 278768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher goto failed_read; 279768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher 2802c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_nlink = le32_to_cpu(sqsh_ino->nlink); 2812c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_size = le32_to_cpu(sqsh_ino->symlink_size); 2822c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_op = &page_symlink_inode_operations; 2832c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_data.a_ops = &squashfs_symlink_aops; 2842c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_mode |= S_IFLNK; 2855921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->start = block; 2865921b8d869f8d9a5a15a520eee1cfae06b1d9688plougher squashfs_i(inode)->offset = offset; 287768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher 288768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher TRACE("Symbolic link inode %x:%x, start_block %llx, offset " 2892c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher "%x\n", SQUASHFS_INODE_BLK(ino), offset, 290bfffe327332facc323af287277f68fe905ce7a8aplougher block, offset); 291768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher break; 292768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher } 293768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher case SQUASHFS_BLKDEV_TYPE: 2949fca346e286002f3e0db6201923b538a740c78b4plougher case SQUASHFS_CHRDEV_TYPE: 2959fca346e286002f3e0db6201923b538a740c78b4plougher case SQUASHFS_LBLKDEV_TYPE: 2969fca346e286002f3e0db6201923b538a740c78b4plougher case SQUASHFS_LCHRDEV_TYPE: { 2972c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher struct squashfs_dev_inode *sqsh_ino = &squashfs_ino.dev; 298768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher unsigned int rdev; 299768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher 3002c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher err = squashfs_read_metadata(sb, sqsh_ino, &block, &offset, 3012c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher sizeof(*sqsh_ino)); 30242d43d8a5d236bdae90e04b241ef5db631904ebfplougher if (err < 0) 303768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher goto failed_read; 304768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher 3052370ab257e7316ed64e110735265b6e78624e372plougher if (type == SQUASHFS_CHRDEV_TYPE) 306c3c96191396ae5b77f9354c5c596b85a1b71fa12plougher inode->i_mode |= S_IFCHR; 3072370ab257e7316ed64e110735265b6e78624e372plougher else 308c3c96191396ae5b77f9354c5c596b85a1b71fa12plougher inode->i_mode |= S_IFBLK; 3092c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_nlink = le32_to_cpu(sqsh_ino->nlink); 3102c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher rdev = le32_to_cpu(sqsh_ino->rdev); 311ad733deaea7fed4411008a47c1e2fc3f0d006fdfplougher init_special_inode(inode, inode->i_mode, new_decode_dev(rdev)); 312768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher 313768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher TRACE("Device inode %x:%x, rdev %x\n", 3142c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher SQUASHFS_INODE_BLK(ino), offset, rdev); 315768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher break; 316768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher } 317768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher case SQUASHFS_FIFO_TYPE: 3189fca346e286002f3e0db6201923b538a740c78b4plougher case SQUASHFS_SOCKET_TYPE: 3199fca346e286002f3e0db6201923b538a740c78b4plougher case SQUASHFS_LFIFO_TYPE: 3209fca346e286002f3e0db6201923b538a740c78b4plougher case SQUASHFS_LSOCKET_TYPE: { 3212c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher struct squashfs_ipc_inode *sqsh_ino = &squashfs_ino.ipc; 322768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher 3232c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher err = squashfs_read_metadata(sb, sqsh_ino, &block, &offset, 3242c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher sizeof(*sqsh_ino)); 32542d43d8a5d236bdae90e04b241ef5db631904ebfplougher if (err < 0) 326768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher goto failed_read; 327768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher 3289c25f9e157d0c783e400fc46ca04b699d0b4b16eplougher if (type == SQUASHFS_FIFO_TYPE) 329c3c96191396ae5b77f9354c5c596b85a1b71fa12plougher inode->i_mode |= S_IFIFO; 3302370ab257e7316ed64e110735265b6e78624e372plougher else 331c3c96191396ae5b77f9354c5c596b85a1b71fa12plougher inode->i_mode |= S_IFSOCK; 3322c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher inode->i_nlink = le32_to_cpu(sqsh_ino->nlink); 333ad733deaea7fed4411008a47c1e2fc3f0d006fdfplougher init_special_inode(inode, inode->i_mode, 0); 334768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher break; 335768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher } 336768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher default: 337768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher ERROR("Unknown inode type %d in squashfs_iget!\n", type); 338171e3df917d22af3d8e5caff56c3665f626d96f4plougher return -EINVAL; 339768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher } 340768b2f10c1a4ee7936d476f139c49ce3194c0f4dplougher 34117f4c6f13075c74c7a4f3f3388c822b9f516b892plougher return 0; 3421f413c84d736495fd61ff05ebe52c3a01a4d95c2plougher 3431f413c84d736495fd61ff05ebe52c3a01a4d95c2plougherfailed_read: 3442c2000a3ee6528d6260dfb7c28ad1730ce351f2eplougher ERROR("Unable to read inode 0x%llx\n", ino); 34517f4c6f13075c74c7a4f3f3388c822b9f516b892plougher return err; 34629e5f570cf51b2f15079a81aec8cf1595f3082cfplougher} 347