mirror of
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1000 lines
24 KiB
C
1000 lines
24 KiB
C
/* jfs.c - JFS. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2004,2005,2006,2007,2008,2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/err.h>
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#include <grub/file.h>
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#include <grub/mm.h>
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#include <grub/misc.h>
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#include <grub/disk.h>
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#include <grub/dl.h>
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#include <grub/types.h>
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#include <grub/charset.h>
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#include <grub/i18n.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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#define GRUB_JFS_MAX_SYMLNK_CNT 8
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#define GRUB_JFS_FILETYPE_MASK 0170000
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#define GRUB_JFS_FILETYPE_REG 0100000
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#define GRUB_JFS_FILETYPE_LNK 0120000
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#define GRUB_JFS_FILETYPE_DIR 0040000
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#define GRUB_JFS_SBLOCK 64
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#define GRUB_JFS_AGGR_INODE 2
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#define GRUB_JFS_FS1_INODE_BLK 104
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#define GRUB_JFS_TREE_LEAF 2
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struct grub_jfs_sblock
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{
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/* The magic for JFS. It should contain the string "JFS1". */
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grub_uint8_t magic[4];
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grub_uint32_t version;
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grub_uint64_t ag_size;
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/* The size of a filesystem block in bytes. XXX: currently only
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4096 was tested. */
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grub_uint32_t blksz;
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grub_uint16_t log2_blksz;
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grub_uint8_t unused[14];
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grub_uint32_t flags;
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grub_uint8_t unused3[61];
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char volname[11];
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grub_uint8_t unused2[24];
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grub_uint8_t uuid[16];
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char volname2[16];
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};
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struct grub_jfs_extent
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{
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/* The length of the extent in filesystem blocks. */
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grub_uint16_t length;
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grub_uint8_t length2;
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/* The physical offset of the first block on the disk. */
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grub_uint8_t blk1;
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grub_uint32_t blk2;
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} __attribute__ ((packed));
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struct grub_jfs_iag
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{
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grub_uint8_t unused[3072];
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struct grub_jfs_extent inodes[128];
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} __attribute__ ((packed));
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/* The head of the tree used to find extents. */
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struct grub_jfs_treehead
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{
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grub_uint64_t next;
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grub_uint64_t prev;
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grub_uint8_t flags;
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grub_uint8_t unused;
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grub_uint16_t count;
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grub_uint16_t max;
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grub_uint8_t unused2[10];
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} __attribute__ ((packed));
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/* A node in the extent tree. */
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struct grub_jfs_tree_extent
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{
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grub_uint8_t flags;
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grub_uint16_t unused;
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/* The offset is the key used to lookup an extent. */
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grub_uint8_t offset1;
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grub_uint32_t offset2;
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struct grub_jfs_extent extent;
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} __attribute__ ((packed));
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/* The tree of directory entries. */
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struct grub_jfs_tree_dir
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{
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/* Pointers to the previous and next tree headers of other nodes on
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this level. */
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grub_uint64_t nextb;
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grub_uint64_t prevb;
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grub_uint8_t flags;
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/* The amount of dirents in this node. */
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grub_uint8_t count;
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grub_uint8_t freecnt;
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grub_uint8_t freelist;
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grub_uint8_t maxslot;
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/* The location of the sorted array of pointers to dirents. */
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grub_uint8_t sindex;
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grub_uint8_t unused[10];
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} __attribute__ ((packed));
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/* An internal node in the dirents tree. */
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struct grub_jfs_internal_dirent
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{
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struct grub_jfs_extent ex;
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grub_uint8_t next;
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grub_uint8_t len;
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grub_uint16_t namepart[11];
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} __attribute__ ((packed));
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/* A leaf node in the dirents tree. */
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struct grub_jfs_leaf_dirent
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{
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/* The inode for this dirent. */
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grub_uint32_t inode;
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grub_uint8_t next;
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/* The size of the name. */
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grub_uint8_t len;
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grub_uint16_t namepart[11];
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grub_uint32_t index;
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} __attribute__ ((packed));
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/* A leaf in the dirents tree. This one is used if the previously
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dirent was not big enough to store the name. */
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struct grub_jfs_leaf_next_dirent
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{
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grub_uint8_t next;
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grub_uint8_t len;
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grub_uint16_t namepart[15];
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} __attribute__ ((packed));
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struct grub_jfs_time
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{
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grub_int32_t sec;
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grub_int32_t nanosec;
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} __attribute__ ((packed));
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struct grub_jfs_inode
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{
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grub_uint32_t stamp;
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grub_uint32_t fileset;
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grub_uint32_t inode;
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grub_uint8_t unused[12];
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grub_uint64_t size;
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grub_uint8_t unused2[20];
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grub_uint32_t mode;
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struct grub_jfs_time atime;
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struct grub_jfs_time ctime;
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struct grub_jfs_time mtime;
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grub_uint8_t unused3[48];
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grub_uint8_t unused4[96];
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union
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{
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/* The tree describing the extents of the file. */
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struct __attribute__ ((packed))
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{
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struct grub_jfs_treehead tree;
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struct grub_jfs_tree_extent extents[16];
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} file;
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union
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{
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/* The tree describing the dirents. */
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struct
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{
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grub_uint8_t unused[16];
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grub_uint8_t flags;
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/* Amount of dirents in this node. */
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grub_uint8_t count;
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grub_uint8_t freecnt;
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grub_uint8_t freelist;
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grub_uint32_t idotdot;
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grub_uint8_t sorted[8];
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} header;
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struct grub_jfs_leaf_dirent dirents[8];
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} dir __attribute__ ((packed));
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/* Fast symlink. */
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struct
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{
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grub_uint8_t unused[32];
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grub_uint8_t path[256];
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} symlink;
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} __attribute__ ((packed));
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} __attribute__ ((packed));
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struct grub_jfs_data
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{
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struct grub_jfs_sblock sblock;
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grub_disk_t disk;
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struct grub_jfs_inode fileset;
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struct grub_jfs_inode currinode;
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int caseins;
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int pos;
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int linknest;
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int namecomponentlen;
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} __attribute__ ((packed));
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struct grub_jfs_diropen
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{
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int index;
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union
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{
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struct grub_jfs_tree_dir header;
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struct grub_jfs_leaf_dirent dirent[0];
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struct grub_jfs_leaf_next_dirent next_dirent[0];
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grub_uint8_t sorted[0];
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} *dirpage __attribute__ ((packed));
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struct grub_jfs_data *data;
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struct grub_jfs_inode *inode;
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int count;
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grub_uint8_t *sorted;
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struct grub_jfs_leaf_dirent *leaf;
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struct grub_jfs_leaf_next_dirent *next_leaf;
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/* The filename and inode of the last read dirent. */
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/* On-disk name is at most 255 UTF-16 codepoints.
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Every UTF-16 codepoint is at most 4 UTF-8 bytes.
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*/
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char name[256 * GRUB_MAX_UTF8_PER_UTF16 + 1];
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grub_uint32_t ino;
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} __attribute__ ((packed));
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static grub_dl_t my_mod;
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static grub_err_t grub_jfs_lookup_symlink (struct grub_jfs_data *data, grub_uint32_t ino);
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/* Get the block number for the block BLK in the node INODE in the
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mounted filesystem DATA. */
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static grub_int64_t
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grub_jfs_blkno (struct grub_jfs_data *data, struct grub_jfs_inode *inode,
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grub_uint64_t blk)
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{
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auto grub_int64_t getblk (struct grub_jfs_treehead *treehead,
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struct grub_jfs_tree_extent *extents);
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grub_int64_t getblk (struct grub_jfs_treehead *treehead,
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struct grub_jfs_tree_extent *extents)
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{
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int found = -1;
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int i;
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for (i = 0; i < grub_le_to_cpu16 (treehead->count) - 2; i++)
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{
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if (treehead->flags & GRUB_JFS_TREE_LEAF)
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{
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/* Read the leafnode. */
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if (grub_le_to_cpu32 (extents[i].offset2) <= blk
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&& ((grub_le_to_cpu16 (extents[i].extent.length))
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+ (extents[i].extent.length2 << 16)
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+ grub_le_to_cpu32 (extents[i].offset2)) > blk)
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return (blk - grub_le_to_cpu32 (extents[i].offset2)
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+ grub_le_to_cpu32 (extents[i].extent.blk2));
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}
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else
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if (blk >= grub_le_to_cpu32 (extents[i].offset2))
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found = i;
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}
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if (found != -1)
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{
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struct
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{
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struct grub_jfs_treehead treehead;
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struct grub_jfs_tree_extent extents[254];
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} tree;
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if (grub_disk_read (data->disk,
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((grub_disk_addr_t) grub_le_to_cpu32 (extents[found].extent.blk2))
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<< (grub_le_to_cpu16 (data->sblock.log2_blksz)
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- GRUB_DISK_SECTOR_BITS), 0,
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sizeof (tree), (char *) &tree))
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return -1;
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return getblk (&tree.treehead, &tree.extents[0]);
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}
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return -1;
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}
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return getblk (&inode->file.tree, &inode->file.extents[0]);
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}
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static grub_err_t
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grub_jfs_read_inode (struct grub_jfs_data *data, grub_uint32_t ino,
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struct grub_jfs_inode *inode)
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{
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struct grub_jfs_iag iag;
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grub_uint32_t iagnum = ino / 4096;
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unsigned inoext = (ino % 4096) / 32;
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unsigned inonum = (ino % 4096) % 32;
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grub_uint64_t iagblk;
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grub_uint64_t inoblk;
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iagblk = grub_jfs_blkno (data, &data->fileset, iagnum + 1);
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if (grub_errno)
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return grub_errno;
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/* Read in the IAG. */
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if (grub_disk_read (data->disk,
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iagblk << (grub_le_to_cpu16 (data->sblock.log2_blksz)
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- GRUB_DISK_SECTOR_BITS), 0,
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sizeof (struct grub_jfs_iag), &iag))
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return grub_errno;
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inoblk = grub_le_to_cpu32 (iag.inodes[inoext].blk2);
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inoblk <<= (grub_le_to_cpu16 (data->sblock.log2_blksz)
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- GRUB_DISK_SECTOR_BITS);
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inoblk += inonum;
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if (grub_disk_read (data->disk, inoblk, 0,
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sizeof (struct grub_jfs_inode), inode))
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return grub_errno;
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return 0;
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}
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static struct grub_jfs_data *
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grub_jfs_mount (grub_disk_t disk)
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{
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struct grub_jfs_data *data = 0;
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data = grub_malloc (sizeof (struct grub_jfs_data));
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if (!data)
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return 0;
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/* Read the superblock. */
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if (grub_disk_read (disk, GRUB_JFS_SBLOCK, 0,
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sizeof (struct grub_jfs_sblock), &data->sblock))
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goto fail;
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if (grub_strncmp ((char *) (data->sblock.magic), "JFS1", 4))
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{
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grub_error (GRUB_ERR_BAD_FS, "not a JFS filesystem");
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goto fail;
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}
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if (data->sblock.blksz == 0
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|| grub_le_to_cpu32 (data->sblock.blksz)
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!= (1U << grub_le_to_cpu16 (data->sblock.log2_blksz))
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|| grub_le_to_cpu16 (data->sblock.log2_blksz) < GRUB_DISK_SECTOR_BITS)
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{
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grub_error (GRUB_ERR_BAD_FS, "not a JFS filesystem");
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goto fail;
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}
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data->disk = disk;
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data->pos = 0;
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data->linknest = 0;
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/* Read the inode of the first fileset. */
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if (grub_disk_read (data->disk, GRUB_JFS_FS1_INODE_BLK, 0,
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sizeof (struct grub_jfs_inode), &data->fileset))
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goto fail;
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if (data->sblock.flags & grub_cpu_to_le32_compile_time (0x00200000))
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data->namecomponentlen = 11;
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else
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data->namecomponentlen = 13;
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if (data->sblock.flags & grub_cpu_to_le32_compile_time (0x40000000))
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data->caseins = 1;
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else
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data->caseins = 0;
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return data;
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fail:
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grub_free (data);
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if (grub_errno == GRUB_ERR_OUT_OF_RANGE)
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grub_error (GRUB_ERR_BAD_FS, "not a JFS filesystem");
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return 0;
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}
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static struct grub_jfs_diropen *
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grub_jfs_opendir (struct grub_jfs_data *data, struct grub_jfs_inode *inode)
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{
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struct grub_jfs_internal_dirent *de;
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struct grub_jfs_diropen *diro;
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grub_disk_addr_t blk;
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de = (struct grub_jfs_internal_dirent *) inode->dir.dirents;
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if (!((grub_le_to_cpu32 (inode->mode)
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& GRUB_JFS_FILETYPE_MASK) == GRUB_JFS_FILETYPE_DIR))
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{
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grub_error (GRUB_ERR_BAD_FILE_TYPE, N_("not a directory"));
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return 0;
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}
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diro = grub_zalloc (sizeof (struct grub_jfs_diropen));
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if (!diro)
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return 0;
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diro->data = data;
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diro->inode = inode;
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/* Check if the entire tree is contained within the inode. */
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if (inode->file.tree.flags & GRUB_JFS_TREE_LEAF)
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{
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diro->leaf = inode->dir.dirents;
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diro->next_leaf = (struct grub_jfs_leaf_next_dirent *) de;
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diro->sorted = inode->dir.header.sorted;
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diro->count = inode->dir.header.count;
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return diro;
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}
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diro->dirpage = grub_malloc (grub_le_to_cpu32 (data->sblock.blksz));
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if (!diro->dirpage)
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{
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grub_free (diro);
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return 0;
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}
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blk = grub_le_to_cpu32 (de[inode->dir.header.sorted[0]].ex.blk2);
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blk <<= (grub_le_to_cpu16 (data->sblock.log2_blksz) - GRUB_DISK_SECTOR_BITS);
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/* Read in the nodes until we are on the leaf node level. */
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do
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{
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int index;
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if (grub_disk_read (data->disk, blk, 0,
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grub_le_to_cpu32 (data->sblock.blksz),
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diro->dirpage->sorted))
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{
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grub_free (diro->dirpage);
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grub_free (diro);
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return 0;
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}
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de = (struct grub_jfs_internal_dirent *) diro->dirpage->dirent;
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index = diro->dirpage->sorted[diro->dirpage->header.sindex * 32];
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blk = (grub_le_to_cpu32 (de[index].ex.blk2)
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<< (grub_le_to_cpu16 (data->sblock.log2_blksz)
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- GRUB_DISK_SECTOR_BITS));
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} while (!(diro->dirpage->header.flags & GRUB_JFS_TREE_LEAF));
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diro->leaf = diro->dirpage->dirent;
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diro->next_leaf = diro->dirpage->next_dirent;
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diro->sorted = &diro->dirpage->sorted[diro->dirpage->header.sindex * 32];
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diro->count = diro->dirpage->header.count;
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return diro;
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}
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static void
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grub_jfs_closedir (struct grub_jfs_diropen *diro)
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{
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if (!diro)
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return;
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grub_free (diro->dirpage);
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grub_free (diro);
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}
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/* Read in the next dirent from the directory described by DIRO. */
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static grub_err_t
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grub_jfs_getent (struct grub_jfs_diropen *diro)
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{
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int strpos = 0;
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struct grub_jfs_leaf_dirent *leaf;
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struct grub_jfs_leaf_next_dirent *next_leaf;
|
||
int len;
|
||
int nextent;
|
||
grub_uint16_t filename[256];
|
||
|
||
auto void addstr (grub_uint16_t *uname, int ulen);
|
||
|
||
/* Add the unicode string to the utf16 filename buffer. */
|
||
void addstr (grub_uint16_t *name, int ulen)
|
||
{
|
||
while (ulen--)
|
||
filename[strpos++] = grub_le_to_cpu16 (*(name++));
|
||
}
|
||
|
||
/* The last node, read in more. */
|
||
if (diro->index == diro->count)
|
||
{
|
||
grub_disk_addr_t next;
|
||
|
||
/* If the inode contains the entry tree or if this was the last
|
||
node, there is nothing to read. */
|
||
if ((diro->inode->file.tree.flags & GRUB_JFS_TREE_LEAF)
|
||
|| !grub_le_to_cpu64 (diro->dirpage->header.nextb))
|
||
return GRUB_ERR_OUT_OF_RANGE;
|
||
|
||
next = grub_le_to_cpu64 (diro->dirpage->header.nextb);
|
||
next <<= (grub_le_to_cpu16 (diro->data->sblock.log2_blksz)
|
||
- GRUB_DISK_SECTOR_BITS);
|
||
|
||
if (grub_disk_read (diro->data->disk, next, 0,
|
||
grub_le_to_cpu32 (diro->data->sblock.blksz),
|
||
diro->dirpage->sorted))
|
||
return grub_errno;
|
||
|
||
diro->leaf = diro->dirpage->dirent;
|
||
diro->next_leaf = diro->dirpage->next_dirent;
|
||
diro->sorted = &diro->dirpage->sorted[diro->dirpage->header.sindex * 32];
|
||
diro->count = diro->dirpage->header.count;
|
||
diro->index = 0;
|
||
}
|
||
|
||
leaf = &diro->leaf[diro->sorted[diro->index]];
|
||
next_leaf = &diro->next_leaf[diro->index];
|
||
|
||
len = leaf->len;
|
||
if (!len)
|
||
{
|
||
diro->index++;
|
||
return grub_jfs_getent (diro);
|
||
}
|
||
|
||
addstr (leaf->namepart, len < diro->data->namecomponentlen ? len
|
||
: diro->data->namecomponentlen);
|
||
diro->ino = grub_le_to_cpu32 (leaf->inode);
|
||
len -= diro->data->namecomponentlen;
|
||
|
||
/* Move down to the leaf level. */
|
||
nextent = leaf->next;
|
||
if (leaf->next != 255)
|
||
do
|
||
{
|
||
next_leaf = &diro->next_leaf[nextent];
|
||
addstr (next_leaf->namepart, len < 15 ? len : 15 );
|
||
|
||
len -= 15;
|
||
nextent = next_leaf->next;
|
||
} while (next_leaf->next != 255 && len > 0);
|
||
|
||
diro->index++;
|
||
|
||
/* Convert the temporary UTF16 filename to UTF8. */
|
||
*grub_utf16_to_utf8 ((grub_uint8_t *) (diro->name), filename, strpos) = '\0';
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Read LEN bytes from the file described by DATA starting with byte
|
||
POS. Return the amount of read bytes in READ. */
|
||
static grub_ssize_t
|
||
grub_jfs_read_file (struct grub_jfs_data *data,
|
||
void NESTED_FUNC_ATTR (*read_hook) (grub_disk_addr_t sector,
|
||
unsigned offset, unsigned length),
|
||
grub_off_t pos, grub_size_t len, char *buf)
|
||
{
|
||
grub_off_t i;
|
||
grub_off_t blockcnt;
|
||
|
||
blockcnt = (len + pos + grub_le_to_cpu32 (data->sblock.blksz) - 1)
|
||
>> grub_le_to_cpu16 (data->sblock.log2_blksz);
|
||
|
||
for (i = pos >> grub_le_to_cpu16 (data->sblock.log2_blksz); i < blockcnt; i++)
|
||
{
|
||
grub_disk_addr_t blknr;
|
||
grub_uint32_t blockoff = pos & (grub_le_to_cpu32 (data->sblock.blksz) - 1);
|
||
grub_uint32_t blockend = grub_le_to_cpu32 (data->sblock.blksz);
|
||
|
||
grub_uint64_t skipfirst = 0;
|
||
|
||
blknr = grub_jfs_blkno (data, &data->currinode, i);
|
||
if (grub_errno)
|
||
return -1;
|
||
|
||
/* Last block. */
|
||
if (i == blockcnt - 1)
|
||
{
|
||
blockend = (len + pos) & (grub_le_to_cpu32 (data->sblock.blksz) - 1);
|
||
|
||
if (!blockend)
|
||
blockend = grub_le_to_cpu32 (data->sblock.blksz);
|
||
}
|
||
|
||
/* First block. */
|
||
if (i == (pos >> grub_le_to_cpu16 (data->sblock.log2_blksz)))
|
||
{
|
||
skipfirst = blockoff;
|
||
blockend -= skipfirst;
|
||
}
|
||
|
||
data->disk->read_hook = read_hook;
|
||
grub_disk_read (data->disk,
|
||
blknr << (grub_le_to_cpu16 (data->sblock.log2_blksz)
|
||
- GRUB_DISK_SECTOR_BITS),
|
||
skipfirst, blockend, buf);
|
||
|
||
data->disk->read_hook = 0;
|
||
if (grub_errno)
|
||
return -1;
|
||
|
||
buf += grub_le_to_cpu32 (data->sblock.blksz) - skipfirst;
|
||
}
|
||
|
||
return len;
|
||
}
|
||
|
||
|
||
/* Find the file with the pathname PATH on the filesystem described by
|
||
DATA. */
|
||
static grub_err_t
|
||
grub_jfs_find_file (struct grub_jfs_data *data, const char *path,
|
||
grub_uint32_t start_ino)
|
||
{
|
||
char fpath[grub_strlen (path)];
|
||
char *name = fpath;
|
||
char *next;
|
||
struct grub_jfs_diropen *diro;
|
||
|
||
grub_strncpy (fpath, path, grub_strlen (path) + 1);
|
||
|
||
if (grub_jfs_read_inode (data, start_ino, &data->currinode))
|
||
return grub_errno;
|
||
|
||
/* Skip the first slashes. */
|
||
while (*name == '/')
|
||
{
|
||
name++;
|
||
if (!*name)
|
||
return 0;
|
||
}
|
||
|
||
/* Extract the actual part from the pathname. */
|
||
next = grub_strchr (name, '/');
|
||
if (next)
|
||
{
|
||
while (*next == '/')
|
||
{
|
||
next[0] = '\0';
|
||
next++;
|
||
}
|
||
}
|
||
diro = grub_jfs_opendir (data, &data->currinode);
|
||
if (!diro)
|
||
return grub_errno;
|
||
|
||
for (;;)
|
||
{
|
||
if (name[0] == 0)
|
||
return GRUB_ERR_NONE;
|
||
|
||
if (name[0] == '.' && name[1] == 0)
|
||
{
|
||
if (!next)
|
||
return 0;
|
||
|
||
name = next;
|
||
next = grub_strchr (name, '/');
|
||
while (next && *next == '/')
|
||
{
|
||
next[0] = '\0';
|
||
next++;
|
||
}
|
||
continue;
|
||
}
|
||
|
||
if (name[0] == '.' && name[1] == '.' && name[2] == 0)
|
||
{
|
||
grub_uint32_t ino = grub_le_to_cpu32 (data->currinode.dir.header.idotdot);
|
||
|
||
grub_jfs_closedir (diro);
|
||
diro = 0;
|
||
|
||
if (grub_jfs_read_inode (data, ino, &data->currinode))
|
||
break;
|
||
|
||
if (!next)
|
||
return 0;
|
||
|
||
name = next;
|
||
next = grub_strchr (name, '/');
|
||
while (next && *next == '/')
|
||
{
|
||
next[0] = '\0';
|
||
next++;
|
||
}
|
||
|
||
/* Open this directory for reading dirents. */
|
||
diro = grub_jfs_opendir (data, &data->currinode);
|
||
if (!diro)
|
||
return grub_errno;
|
||
|
||
continue;
|
||
}
|
||
|
||
if (grub_jfs_getent (diro) == GRUB_ERR_OUT_OF_RANGE)
|
||
break;
|
||
|
||
/* Check if the current direntry matches the current part of the
|
||
pathname. */
|
||
if (data->caseins ? grub_strcasecmp (name, diro->name) == 0
|
||
: grub_strcmp (name, diro->name) == 0)
|
||
{
|
||
grub_uint32_t ino = diro->ino;
|
||
grub_uint32_t dirino = grub_le_to_cpu32 (data->currinode.inode);
|
||
|
||
grub_jfs_closedir (diro);
|
||
diro = 0;
|
||
|
||
if (grub_jfs_read_inode (data, ino, &data->currinode))
|
||
break;
|
||
|
||
/* Check if this is a symlink. */
|
||
if ((grub_le_to_cpu32 (data->currinode.mode)
|
||
& GRUB_JFS_FILETYPE_MASK) == GRUB_JFS_FILETYPE_LNK)
|
||
{
|
||
grub_jfs_lookup_symlink (data, dirino);
|
||
if (grub_errno)
|
||
return grub_errno;
|
||
}
|
||
|
||
if (!next)
|
||
return 0;
|
||
|
||
name = next;
|
||
next = grub_strchr (name, '/');
|
||
while (next && *next == '/')
|
||
{
|
||
next[0] = '\0';
|
||
next++;
|
||
}
|
||
|
||
/* Open this directory for reading dirents. */
|
||
diro = grub_jfs_opendir (data, &data->currinode);
|
||
if (!diro)
|
||
return grub_errno;
|
||
|
||
continue;
|
||
}
|
||
}
|
||
|
||
grub_jfs_closedir (diro);
|
||
grub_error (GRUB_ERR_FILE_NOT_FOUND, N_("file `%s' not found"), path);
|
||
return grub_errno;
|
||
}
|
||
|
||
|
||
static grub_err_t
|
||
grub_jfs_lookup_symlink (struct grub_jfs_data *data, grub_uint32_t ino)
|
||
{
|
||
grub_size_t size = grub_le_to_cpu64 (data->currinode.size);
|
||
char symlink[size + 1];
|
||
|
||
if (++data->linknest > GRUB_JFS_MAX_SYMLNK_CNT)
|
||
return grub_error (GRUB_ERR_SYMLINK_LOOP, N_("too deep nesting of symlinks"));
|
||
|
||
if (size <= sizeof (data->currinode.symlink.path))
|
||
grub_strncpy (symlink, (char *) (data->currinode.symlink.path), size);
|
||
else if (grub_jfs_read_file (data, 0, 0, size, symlink) < 0)
|
||
return grub_errno;
|
||
|
||
symlink[size] = '\0';
|
||
|
||
/* The symlink is an absolute path, go back to the root inode. */
|
||
if (symlink[0] == '/')
|
||
ino = 2;
|
||
|
||
grub_jfs_find_file (data, symlink, ino);
|
||
|
||
return grub_errno;
|
||
}
|
||
|
||
|
||
static grub_err_t
|
||
grub_jfs_dir (grub_device_t device, const char *path,
|
||
int (*hook) (const char *filename,
|
||
const struct grub_dirhook_info *info))
|
||
{
|
||
struct grub_jfs_data *data = 0;
|
||
struct grub_jfs_diropen *diro = 0;
|
||
|
||
grub_dl_ref (my_mod);
|
||
|
||
data = grub_jfs_mount (device->disk);
|
||
if (!data)
|
||
goto fail;
|
||
|
||
if (grub_jfs_find_file (data, path, GRUB_JFS_AGGR_INODE))
|
||
goto fail;
|
||
|
||
diro = grub_jfs_opendir (data, &data->currinode);
|
||
if (!diro)
|
||
goto fail;
|
||
|
||
/* Iterate over the dirents in the directory that was found. */
|
||
while (grub_jfs_getent (diro) != GRUB_ERR_OUT_OF_RANGE)
|
||
{
|
||
struct grub_jfs_inode inode;
|
||
struct grub_dirhook_info info;
|
||
grub_memset (&info, 0, sizeof (info));
|
||
|
||
if (grub_jfs_read_inode (data, diro->ino, &inode))
|
||
goto fail;
|
||
|
||
info.dir = (grub_le_to_cpu32 (inode.mode)
|
||
& GRUB_JFS_FILETYPE_MASK) == GRUB_JFS_FILETYPE_DIR;
|
||
info.mtimeset = 1;
|
||
info.mtime = grub_le_to_cpu32 (inode.mtime.sec);
|
||
if (hook (diro->name, &info))
|
||
goto fail;
|
||
}
|
||
|
||
/* XXX: GRUB_ERR_OUT_OF_RANGE is used for the last dirent. */
|
||
if (grub_errno == GRUB_ERR_OUT_OF_RANGE)
|
||
grub_errno = 0;
|
||
|
||
fail:
|
||
grub_jfs_closedir (diro);
|
||
grub_free (data);
|
||
|
||
grub_dl_unref (my_mod);
|
||
|
||
return grub_errno;
|
||
}
|
||
|
||
|
||
/* Open a file named NAME and initialize FILE. */
|
||
static grub_err_t
|
||
grub_jfs_open (struct grub_file *file, const char *name)
|
||
{
|
||
struct grub_jfs_data *data;
|
||
|
||
grub_dl_ref (my_mod);
|
||
|
||
data = grub_jfs_mount (file->device->disk);
|
||
if (!data)
|
||
goto fail;
|
||
|
||
grub_jfs_find_file (data, name, GRUB_JFS_AGGR_INODE);
|
||
if (grub_errno)
|
||
goto fail;
|
||
|
||
/* It is only possible for open regular files. */
|
||
if (! ((grub_le_to_cpu32 (data->currinode.mode)
|
||
& GRUB_JFS_FILETYPE_MASK) == GRUB_JFS_FILETYPE_REG))
|
||
{
|
||
grub_error (GRUB_ERR_BAD_FILE_TYPE, N_("not a regular file"));
|
||
goto fail;
|
||
}
|
||
|
||
file->data = data;
|
||
file->size = grub_le_to_cpu64 (data->currinode.size);
|
||
|
||
return 0;
|
||
|
||
fail:
|
||
|
||
grub_dl_unref (my_mod);
|
||
|
||
grub_free (data);
|
||
|
||
return grub_errno;
|
||
}
|
||
|
||
|
||
static grub_ssize_t
|
||
grub_jfs_read (grub_file_t file, char *buf, grub_size_t len)
|
||
{
|
||
struct grub_jfs_data *data =
|
||
(struct grub_jfs_data *) file->data;
|
||
|
||
return grub_jfs_read_file (data, file->read_hook, file->offset, len, buf);
|
||
}
|
||
|
||
|
||
static grub_err_t
|
||
grub_jfs_close (grub_file_t file)
|
||
{
|
||
grub_free (file->data);
|
||
|
||
grub_dl_unref (my_mod);
|
||
|
||
return GRUB_ERR_NONE;
|
||
}
|
||
|
||
static grub_err_t
|
||
grub_jfs_uuid (grub_device_t device, char **uuid)
|
||
{
|
||
struct grub_jfs_data *data;
|
||
grub_disk_t disk = device->disk;
|
||
|
||
grub_dl_ref (my_mod);
|
||
|
||
data = grub_jfs_mount (disk);
|
||
if (data)
|
||
{
|
||
*uuid = grub_xasprintf ("%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-"
|
||
"%02x%02x%02x%02x%02x%02x",
|
||
data->sblock.uuid[0], data->sblock.uuid[1],
|
||
data->sblock.uuid[2], data->sblock.uuid[3],
|
||
data->sblock.uuid[4], data->sblock.uuid[5],
|
||
data->sblock.uuid[6], data->sblock.uuid[7],
|
||
data->sblock.uuid[8], data->sblock.uuid[9],
|
||
data->sblock.uuid[10], data->sblock.uuid[11],
|
||
data->sblock.uuid[12], data->sblock.uuid[13],
|
||
data->sblock.uuid[14], data->sblock.uuid[15]);
|
||
}
|
||
else
|
||
*uuid = NULL;
|
||
|
||
grub_dl_unref (my_mod);
|
||
|
||
grub_free (data);
|
||
|
||
return grub_errno;
|
||
}
|
||
|
||
static grub_err_t
|
||
grub_jfs_label (grub_device_t device, char **label)
|
||
{
|
||
struct grub_jfs_data *data;
|
||
data = grub_jfs_mount (device->disk);
|
||
|
||
if (data)
|
||
{
|
||
if (data->sblock.volname2[0] < ' ')
|
||
{
|
||
char *ptr;
|
||
ptr = data->sblock.volname + sizeof (data->sblock.volname) - 1;
|
||
while (ptr >= data->sblock.volname && *ptr == ' ')
|
||
ptr--;
|
||
*label = grub_strndup (data->sblock.volname,
|
||
ptr - data->sblock.volname + 1);
|
||
}
|
||
else
|
||
*label = grub_strndup (data->sblock.volname2,
|
||
sizeof (data->sblock.volname2));
|
||
}
|
||
else
|
||
*label = 0;
|
||
|
||
grub_free (data);
|
||
|
||
return grub_errno;
|
||
}
|
||
|
||
|
||
static struct grub_fs grub_jfs_fs =
|
||
{
|
||
.name = "jfs",
|
||
.dir = grub_jfs_dir,
|
||
.open = grub_jfs_open,
|
||
.read = grub_jfs_read,
|
||
.close = grub_jfs_close,
|
||
.label = grub_jfs_label,
|
||
.uuid = grub_jfs_uuid,
|
||
#ifdef GRUB_UTIL
|
||
.reserved_first_sector = 1,
|
||
.blocklist_install = 1,
|
||
#endif
|
||
.next = 0
|
||
};
|
||
|
||
GRUB_MOD_INIT(jfs)
|
||
{
|
||
grub_fs_register (&grub_jfs_fs);
|
||
my_mod = mod;
|
||
}
|
||
|
||
GRUB_MOD_FINI(jfs)
|
||
{
|
||
grub_fs_unregister (&grub_jfs_fs);
|
||
}
|