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mksquashfs.c
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mksquashfs.c
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/*
* Create a squashfs filesystem. This is a highly compressed read only
* filesystem.
*
* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011,
* 2012, 2013, 2014
* 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* mksquashfs.c
*/
#define FALSE 0
#define TRUE 1
#define MAX_LINE 16384
#include <pwd.h>
#include <grp.h>
#include <time.h>
#include <unistd.h>
#include <stdio.h>
#include <stddef.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <dirent.h>
#include <string.h>
#include <stdlib.h>
#include <signal.h>
#include <setjmp.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <pthread.h>
#include <regex.h>
#include <fnmatch.h>
#include <sys/wait.h>
#include <limits.h>
#include <ctype.h>
#ifndef linux
#define __BYTE_ORDER BYTE_ORDER
#define __BIG_ENDIAN BIG_ENDIAN
#define __LITTLE_ENDIAN LITTLE_ENDIAN
#include <sys/sysctl.h>
#else
#include <endian.h>
#include <sys/sysinfo.h>
#endif
#include "squashfs_fs.h"
#include "squashfs_swap.h"
#include "mksquashfs.h"
#include "sort.h"
#include "pseudo.h"
#include "compressor.h"
#include "xattr.h"
#include "action.h"
#include "error.h"
#include "progressbar.h"
#include "info.h"
#include "caches-queues-lists.h"
#include "read_fs.h"
#include "restore.h"
#include "process_fragments.h"
int delete = FALSE;
int fd;
struct squashfs_super_block sBlk;
/* filesystem flags for building */
int comp_opts = FALSE;
int no_xattrs = XATTR_DEF;
int noX = FALSE;
int duplicate_checking = TRUE;
int noF = FALSE;
int no_fragments = FALSE;
int always_use_fragments = FALSE;
int noI = FALSE;
int noD = FALSE;
int silent = TRUE;
int exportable = TRUE;
int sparse_files = TRUE;
int old_exclude = TRUE;
int use_regex = FALSE;
int nopad = FALSE;
int exit_on_error = FALSE;
long long global_uid = -1, global_gid = -1;
/* superblock attributes */
int block_size = SQUASHFS_FILE_SIZE, block_log;
unsigned int id_count = 0;
int file_count = 0, sym_count = 0, dev_count = 0, dir_count = 0, fifo_count = 0,
sock_count = 0;
/* write position within data section */
long long bytes = 0, total_bytes = 0;
/* in memory directory table - possibly compressed */
char *directory_table = NULL;
unsigned int directory_bytes = 0, directory_size = 0, total_directory_bytes = 0;
/* cached directory table */
char *directory_data_cache = NULL;
unsigned int directory_cache_bytes = 0, directory_cache_size = 0;
/* in memory inode table - possibly compressed */
char *inode_table = NULL;
unsigned int inode_bytes = 0, inode_size = 0, total_inode_bytes = 0;
/* cached inode table */
char *data_cache = NULL;
unsigned int cache_bytes = 0, cache_size = 0, inode_count = 0;
/* inode lookup table */
squashfs_inode *inode_lookup_table = NULL;
/* in memory directory data */
#define I_COUNT_SIZE 128
#define DIR_ENTRIES 32
#define INODE_HASH_SIZE 65536
#define INODE_HASH_MASK (INODE_HASH_SIZE - 1)
#define INODE_HASH(dev, ino) (ino & INODE_HASH_MASK)
struct cached_dir_index {
struct squashfs_dir_index index;
char *name;
};
struct directory {
unsigned int start_block;
unsigned int size;
unsigned char *buff;
unsigned char *p;
unsigned int entry_count;
unsigned char *entry_count_p;
unsigned int i_count;
unsigned int i_size;
struct cached_dir_index *index;
unsigned char *index_count_p;
unsigned int inode_number;
};
struct inode_info *inode_info[INODE_HASH_SIZE];
/* hash tables used to do fast duplicate searches in duplicate check */
struct file_info *dupl[65536];
int dup_files = 0;
/* exclude file handling */
/* list of exclude dirs/files */
struct exclude_info {
dev_t st_dev;
ino_t st_ino;
};
#define EXCLUDE_SIZE 8192
int exclude = 0;
struct exclude_info *exclude_paths = NULL;
int old_excluded(char *filename, struct stat *buf);
struct path_entry {
char *name;
regex_t *preg;
struct pathname *paths;
};
struct pathname {
int names;
struct path_entry *name;
};
struct pathnames {
int count;
struct pathname *path[0];
};
#define PATHS_ALLOC_SIZE 10
struct pathnames *paths = NULL;
struct pathname *path = NULL;
struct pathname *stickypath = NULL;
int excluded(char *name, struct pathnames *paths, struct pathnames **new);
int fragments = 0;
#define FRAG_SIZE 32768
struct squashfs_fragment_entry *fragment_table = NULL;
int fragments_outstanding = 0;
int fragments_locked = FALSE;
/* current inode number for directories and non directories */
unsigned int inode_no = 1;
unsigned int root_inode_number = 0;
/* list of source dirs/files */
int source = 0;
char **source_path;
/* list of root directory entries read from original filesystem */
int old_root_entries = 0;
struct old_root_entry_info {
char *name;
struct inode_info inode;
};
struct old_root_entry_info *old_root_entry;
/* restore orignal filesystem state if appending to existing filesystem is
* cancelled */
int appending = FALSE;
char *sdata_cache, *sdirectory_data_cache, *sdirectory_compressed;
long long sbytes, stotal_bytes;
unsigned int sinode_bytes, scache_bytes, sdirectory_bytes,
sdirectory_cache_bytes, sdirectory_compressed_bytes,
stotal_inode_bytes, stotal_directory_bytes,
sinode_count = 0, sfile_count, ssym_count, sdev_count,
sdir_count, sfifo_count, ssock_count, sdup_files;
int sfragments;
int threads;
/* flag whether destination file is a block device */
int block_device = FALSE;
/* flag indicating whether files are sorted using sort list(s) */
int sorted = FALSE;
/* save destination file name for deleting on error */
char *destination_file = NULL;
/* recovery file for abnormal exit on appending */
char *recovery_file = NULL;
int recover = TRUE;
struct id *id_hash_table[ID_ENTRIES];
struct id *id_table[SQUASHFS_IDS], *sid_table[SQUASHFS_IDS];
unsigned int uid_count = 0, guid_count = 0;
unsigned int sid_count = 0, suid_count = 0, sguid_count = 0;
struct cache *reader_buffer, *fragment_buffer, *reserve_cache;
struct cache *bwriter_buffer, *fwriter_buffer;
struct queue *to_reader, *to_deflate, *to_writer, *from_writer,
*to_frag, *locked_fragment, *to_process_frag;
struct seq_queue *to_main;
pthread_t reader_thread, writer_thread, main_thread;
pthread_t *deflator_thread, *frag_deflator_thread, *frag_thread;
pthread_t *restore_thread = NULL;
pthread_mutex_t fragment_mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t pos_mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t dup_mutex = PTHREAD_MUTEX_INITIALIZER;
/* user options that control parallelisation */
int processors = -1;
int bwriter_size;
/* compression operations */
struct compressor *comp = NULL;
int compressor_opt_parsed = FALSE;
void *stream = NULL;
/* xattr stats */
unsigned int xattr_bytes = 0, total_xattr_bytes = 0;
/* fragment to file mapping used when appending */
int append_fragments = 0;
struct append_file **file_mapping;
static char *read_from_disk(long long start, unsigned int avail_bytes);
void add_old_root_entry(char *name, squashfs_inode inode, int inode_number,
int type);
struct file_info *duplicate(long long file_size, long long bytes,
unsigned int **block_list, long long *start, struct fragment **fragment,
struct file_buffer *file_buffer, int blocks, unsigned short checksum,
int checksum_flag);
struct dir_info *dir_scan1(char *, char *, struct pathnames *,
struct dir_ent *(_readdir)(struct dir_info *), int);
void dir_scan2(struct dir_info *dir, struct pseudo *pseudo);
void dir_scan3(struct dir_info *root, struct dir_info *dir);
void dir_scan4(struct dir_info *dir);
void dir_scan5(struct dir_info *dir);
void dir_scan6(squashfs_inode *inode, struct dir_info *dir_info);
struct file_info *add_non_dup(long long file_size, long long bytes,
unsigned int *block_list, long long start, struct fragment *fragment,
unsigned short checksum, unsigned short fragment_checksum,
int checksum_flag, int checksum_frag_flag);
long long generic_write_table(int, void *, int, void *, int);
void restorefs();
struct dir_info *scan1_opendir(char *pathname, char *subpath, int depth);
void write_filesystem_tables(struct squashfs_super_block *sBlk, int nopad);
unsigned short get_checksum_mem(char *buff, int bytes);
int get_physical_memory();
void prep_exit()
{
if(restore_thread) {
if(pthread_self() == *restore_thread) {
/*
* Recursive failure when trying to restore filesystem!
* Nothing to do except to exit, otherwise we'll just
* appear to hang. The user should be able to restore
* from the recovery file (which is why it was added, in
* case of catastrophic failure in Mksquashfs)
*/
exit(1);
} else {
/* signal the restore thread to restore */
pthread_kill(*restore_thread, SIGUSR1);
pthread_exit(NULL);
}
} else if(delete) {
if(destination_file && !block_device)
unlink(destination_file);
} else if(recovery_file)
unlink(recovery_file);
}
int add_overflow(int a, int b)
{
return (INT_MAX - a) < b;
}
int shift_overflow(int a, int shift)
{
return (INT_MAX >> shift) < a;
}
int multiply_overflow(int a, int multiplier)
{
return (INT_MAX / multiplier) < a;
}
int multiply_overflowll(long long a, int multiplier)
{
return (LLONG_MAX / multiplier) < a;
}
#define MKINODE(A) ((squashfs_inode)(((squashfs_inode) inode_bytes << 16) \
+ (((char *)A) - data_cache)))
void restorefs()
{
ERROR("Exiting - restoring original filesystem!\n\n");
bytes = sbytes;
memcpy(data_cache, sdata_cache, cache_bytes = scache_bytes);
memcpy(directory_data_cache, sdirectory_data_cache,
sdirectory_cache_bytes);
directory_cache_bytes = sdirectory_cache_bytes;
inode_bytes = sinode_bytes;
directory_bytes = sdirectory_bytes;
memcpy(directory_table + directory_bytes, sdirectory_compressed,
sdirectory_compressed_bytes);
directory_bytes += sdirectory_compressed_bytes;
total_bytes = stotal_bytes;
total_inode_bytes = stotal_inode_bytes;
total_directory_bytes = stotal_directory_bytes;
inode_count = sinode_count;
file_count = sfile_count;
sym_count = ssym_count;
dev_count = sdev_count;
dir_count = sdir_count;
fifo_count = sfifo_count;
sock_count = ssock_count;
dup_files = sdup_files;
fragments = sfragments;
id_count = sid_count;
restore_xattrs();
write_filesystem_tables(&sBlk, nopad);
exit(1);
}
void sighandler()
{
EXIT_MKSQUASHFS();
}
int mangle2(void *strm, char *d, char *s, int size,
int block_size, int uncompressed, int data_block)
{
int error, c_byte = 0;
if(!uncompressed) {
c_byte = compressor_compress(comp, strm, d, s, size, block_size,
&error);
if(c_byte == -1)
BAD_ERROR("mangle2:: %s compress failed with error "
"code %d\n", comp->name, error);
}
if(c_byte == 0 || c_byte >= size) {
memcpy(d, s, size);
return size | (data_block ? SQUASHFS_COMPRESSED_BIT_BLOCK :
SQUASHFS_COMPRESSED_BIT);
}
return c_byte;
}
int mangle(char *d, char *s, int size, int block_size,
int uncompressed, int data_block)
{
return mangle2(stream, d, s, size, block_size, uncompressed,
data_block);
}
void *get_inode(int req_size)
{
int data_space;
unsigned short c_byte;
while(cache_bytes >= SQUASHFS_METADATA_SIZE) {
if((inode_size - inode_bytes) <
((SQUASHFS_METADATA_SIZE << 1)) + 2) {
void *it = realloc(inode_table, inode_size +
(SQUASHFS_METADATA_SIZE << 1) + 2);
if(it == NULL)
MEM_ERROR();
inode_table = it;
inode_size += (SQUASHFS_METADATA_SIZE << 1) + 2;
}
c_byte = mangle(inode_table + inode_bytes + BLOCK_OFFSET,
data_cache, SQUASHFS_METADATA_SIZE,
SQUASHFS_METADATA_SIZE, noI, 0);
TRACE("Inode block @ 0x%x, size %d\n", inode_bytes, c_byte);
SQUASHFS_SWAP_SHORTS(&c_byte, inode_table + inode_bytes, 1);
inode_bytes += SQUASHFS_COMPRESSED_SIZE(c_byte) + BLOCK_OFFSET;
total_inode_bytes += SQUASHFS_METADATA_SIZE + BLOCK_OFFSET;
memmove(data_cache, data_cache + SQUASHFS_METADATA_SIZE,
cache_bytes - SQUASHFS_METADATA_SIZE);
cache_bytes -= SQUASHFS_METADATA_SIZE;
}
data_space = (cache_size - cache_bytes);
if(data_space < req_size) {
int realloc_size = cache_size == 0 ?
((req_size + SQUASHFS_METADATA_SIZE) &
~(SQUASHFS_METADATA_SIZE - 1)) : req_size -
data_space;
void *dc = realloc(data_cache, cache_size +
realloc_size);
if(dc == NULL)
MEM_ERROR();
cache_size += realloc_size;
data_cache = dc;
}
cache_bytes += req_size;
return data_cache + cache_bytes - req_size;
}
int read_bytes(int fd, void *buff, int bytes)
{
int res, count;
for(count = 0; count < bytes; count += res) {
res = read(fd, buff + count, bytes - count);
if(res < 1) {
if(res == 0)
goto bytes_read;
else if(errno != EINTR) {
ERROR("Read failed because %s\n",
strerror(errno));
return -1;
} else
res = 0;
}
}
bytes_read:
return count;
}
int read_fs_bytes(int fd, long long byte, int bytes, void *buff)
{
off_t off = byte;
int res = 1;
TRACE("read_fs_bytes: reading from position 0x%llx, bytes %d\n",
byte, bytes);
pthread_cleanup_push((void *) pthread_mutex_unlock, &pos_mutex);
pthread_mutex_lock(&pos_mutex);
if(lseek(fd, off, SEEK_SET) == -1) {
ERROR("read_fs_bytes: Lseek on destination failed because %s, "
"offset=0x%llx\n", strerror(errno), off);
res = 0;
} else if(read_bytes(fd, buff, bytes) < bytes) {
ERROR("Read on destination failed\n");
res = 0;
}
pthread_cleanup_pop(1);
return res;
}
int write_bytes(int fd, void *buff, int bytes)
{
int res, count;
for(count = 0; count < bytes; count += res) {
res = write(fd, buff + count, bytes - count);
if(res == -1) {
if(errno != EINTR) {
ERROR("Write failed because %s\n",
strerror(errno));
return -1;
}
res = 0;
}
}
return 0;
}
void write_destination(int fd, long long byte, int bytes, void *buff)
{
off_t off = byte;
pthread_cleanup_push((void *) pthread_mutex_unlock, &pos_mutex);
pthread_mutex_lock(&pos_mutex);
if(lseek(fd, off, SEEK_SET) == -1) {
ERROR("write_destination: Lseek on destination "
"failed because %s, offset=0x%llx\n", strerror(errno),
off);
BAD_ERROR("Probably out of space on output %s\n",
block_device ? "block device" : "filesystem");
}
if(write_bytes(fd, buff, bytes) == -1)
BAD_ERROR("Failed to write to output %s\n",
block_device ? "block device" : "filesystem");
pthread_cleanup_pop(1);
}
long long write_inodes()
{
unsigned short c_byte;
int avail_bytes;
char *datap = data_cache;
long long start_bytes = bytes;
while(cache_bytes) {
if(inode_size - inode_bytes <
((SQUASHFS_METADATA_SIZE << 1) + 2)) {
void *it = realloc(inode_table, inode_size +
((SQUASHFS_METADATA_SIZE << 1) + 2));
if(it == NULL)
MEM_ERROR();
inode_size += (SQUASHFS_METADATA_SIZE << 1) + 2;
inode_table = it;
}
avail_bytes = cache_bytes > SQUASHFS_METADATA_SIZE ?
SQUASHFS_METADATA_SIZE : cache_bytes;
c_byte = mangle(inode_table + inode_bytes + BLOCK_OFFSET, datap,
avail_bytes, SQUASHFS_METADATA_SIZE, noI, 0);
TRACE("Inode block @ 0x%x, size %d\n", inode_bytes, c_byte);
SQUASHFS_SWAP_SHORTS(&c_byte, inode_table + inode_bytes, 1);
inode_bytes += SQUASHFS_COMPRESSED_SIZE(c_byte) + BLOCK_OFFSET;
total_inode_bytes += avail_bytes + BLOCK_OFFSET;
datap += avail_bytes;
cache_bytes -= avail_bytes;
}
write_destination(fd, bytes, inode_bytes, inode_table);
bytes += inode_bytes;
return start_bytes;
}
long long write_directories()
{
unsigned short c_byte;
int avail_bytes;
char *directoryp = directory_data_cache;
long long start_bytes = bytes;
while(directory_cache_bytes) {
if(directory_size - directory_bytes <
((SQUASHFS_METADATA_SIZE << 1) + 2)) {
void *dt = realloc(directory_table,
directory_size + ((SQUASHFS_METADATA_SIZE << 1)
+ 2));
if(dt == NULL)
MEM_ERROR();
directory_size += (SQUASHFS_METADATA_SIZE << 1) + 2;
directory_table = dt;
}
avail_bytes = directory_cache_bytes > SQUASHFS_METADATA_SIZE ?
SQUASHFS_METADATA_SIZE : directory_cache_bytes;
c_byte = mangle(directory_table + directory_bytes +
BLOCK_OFFSET, directoryp, avail_bytes,
SQUASHFS_METADATA_SIZE, noI, 0);
TRACE("Directory block @ 0x%x, size %d\n", directory_bytes,
c_byte);
SQUASHFS_SWAP_SHORTS(&c_byte,
directory_table + directory_bytes, 1);
directory_bytes += SQUASHFS_COMPRESSED_SIZE(c_byte) +
BLOCK_OFFSET;
total_directory_bytes += avail_bytes + BLOCK_OFFSET;
directoryp += avail_bytes;
directory_cache_bytes -= avail_bytes;
}
write_destination(fd, bytes, directory_bytes, directory_table);
bytes += directory_bytes;
return start_bytes;
}
long long write_id_table()
{
unsigned int id_bytes = SQUASHFS_ID_BYTES(id_count);
unsigned int p[id_count];
int i;
TRACE("write_id_table: ids %d, id_bytes %d\n", id_count, id_bytes);
for(i = 0; i < id_count; i++) {
TRACE("write_id_table: id index %d, id %d", i, id_table[i]->id);
SQUASHFS_SWAP_INTS(&id_table[i]->id, p + i, 1);
}
return generic_write_table(id_bytes, p, 0, NULL, noI);
}
struct id *get_id(unsigned int id)
{
int hash = ID_HASH(id);
struct id *entry = id_hash_table[hash];
for(; entry; entry = entry->next)
if(entry->id == id)
break;
return entry;
}
struct id *create_id(unsigned int id)
{
int hash = ID_HASH(id);
struct id *entry = malloc(sizeof(struct id));
if(entry == NULL)
MEM_ERROR();
entry->id = id;
entry->index = id_count ++;
entry->flags = 0;
entry->next = id_hash_table[hash];
id_hash_table[hash] = entry;
id_table[entry->index] = entry;
return entry;
}
unsigned int get_uid(unsigned int uid)
{
struct id *entry = get_id(uid);
if(entry == NULL) {
if(id_count == SQUASHFS_IDS)
BAD_ERROR("Out of uids!\n");
entry = create_id(uid);
}
if((entry->flags & ISA_UID) == 0) {
entry->flags |= ISA_UID;
uid_count ++;
}
return entry->index;
}
unsigned int get_guid(unsigned int guid)
{
struct id *entry = get_id(guid);
if(entry == NULL) {
if(id_count == SQUASHFS_IDS)
BAD_ERROR("Out of gids!\n");
entry = create_id(guid);
}
if((entry->flags & ISA_GID) == 0) {
entry->flags |= ISA_GID;
guid_count ++;
}
return entry->index;
}
#define ALLOC_SIZE 128
char *_pathname(struct dir_ent *dir_ent, char *pathname, int *size)
{
if(pathname == NULL) {
pathname = malloc(ALLOC_SIZE);
if(pathname == NULL)
MEM_ERROR();
}
for(;;) {
int res = snprintf(pathname, *size, "%s/%s",
dir_ent->our_dir->pathname,
dir_ent->source_name ? : dir_ent->name);
if(res < 0)
BAD_ERROR("snprintf failed in pathname\n");
else if(res >= *size) {
/*
* pathname is too small to contain the result, so
* increase it and try again
*/
*size = (res + ALLOC_SIZE) & ~(ALLOC_SIZE - 1);
pathname = realloc(pathname, *size);
if(pathname == NULL)
MEM_ERROR();
} else
break;
}
return pathname;
}
char *pathname(struct dir_ent *dir_ent)
{
static char *pathname = NULL;
static int size = ALLOC_SIZE;
if (dir_ent->nonstandard_pathname)
return dir_ent->nonstandard_pathname;
return pathname = _pathname(dir_ent, pathname, &size);
}
char *pathname_reader(struct dir_ent *dir_ent)
{
static char *pathname = NULL;
static int size = ALLOC_SIZE;
if (dir_ent->nonstandard_pathname)
return dir_ent->nonstandard_pathname;
return pathname = _pathname(dir_ent, pathname, &size);
}
char *subpathname(struct dir_ent *dir_ent)
{
static char *subpath = NULL;
static int size = ALLOC_SIZE;
int res;
if(subpath == NULL) {
subpath = malloc(ALLOC_SIZE);
if(subpath == NULL)
MEM_ERROR();
}
for(;;) {
if(dir_ent->our_dir->subpath[0] != '\0')
res = snprintf(subpath, size, "%s/%s",
dir_ent->our_dir->subpath, dir_ent->name);
else
res = snprintf(subpath, size, "/%s", dir_ent->name);
if(res < 0)
BAD_ERROR("snprintf failed in subpathname\n");
else if(res >= size) {
/*
* subpath is too small to contain the result, so
* increase it and try again
*/
size = (res + ALLOC_SIZE) & ~(ALLOC_SIZE - 1);
subpath = realloc(subpath, size);
if(subpath == NULL)
MEM_ERROR();
} else
break;
}
return subpath;
}
inline unsigned int get_inode_no(struct inode_info *inode)
{
return inode->inode_number;
}
inline unsigned int get_parent_no(struct dir_info *dir)
{
return dir->depth ? get_inode_no(dir->dir_ent->inode) : inode_no;
}
int create_inode(squashfs_inode *i_no, struct dir_info *dir_info,
struct dir_ent *dir_ent, int type, long long byte_size,
long long start_block, unsigned int offset, unsigned int *block_list,
struct fragment *fragment, struct directory *dir_in, long long sparse)
{
struct stat *buf = &dir_ent->inode->buf;
union squashfs_inode_header inode_header;
struct squashfs_base_inode_header *base = &inode_header.base;
void *inode;
char *filename = pathname(dir_ent);
int nlink = dir_ent->inode->nlink;
int xattr = read_xattrs(dir_ent);
switch(type) {
case SQUASHFS_FILE_TYPE:
if(dir_ent->inode->nlink > 1 ||
byte_size >= (1LL << 32) ||
start_block >= (1LL << 32) ||
sparse || IS_XATTR(xattr))
type = SQUASHFS_LREG_TYPE;
break;
case SQUASHFS_DIR_TYPE:
if(dir_info->dir_is_ldir || IS_XATTR(xattr))
type = SQUASHFS_LDIR_TYPE;
break;
case SQUASHFS_SYMLINK_TYPE:
if(IS_XATTR(xattr))
type = SQUASHFS_LSYMLINK_TYPE;
break;
case SQUASHFS_BLKDEV_TYPE:
if(IS_XATTR(xattr))
type = SQUASHFS_LBLKDEV_TYPE;
break;
case SQUASHFS_CHRDEV_TYPE:
if(IS_XATTR(xattr))
type = SQUASHFS_LCHRDEV_TYPE;
break;
case SQUASHFS_FIFO_TYPE:
if(IS_XATTR(xattr))
type = SQUASHFS_LFIFO_TYPE;
break;
case SQUASHFS_SOCKET_TYPE:
if(IS_XATTR(xattr))
type = SQUASHFS_LSOCKET_TYPE;
break;
}
base->mode = SQUASHFS_MODE(buf->st_mode);
base->uid = get_uid((unsigned int) global_uid == -1 ?
buf->st_uid : global_uid);
base->inode_type = type;
base->guid = get_guid((unsigned int) global_gid == -1 ?
buf->st_gid : global_gid);
base->mtime = buf->st_mtime;
base->inode_number = get_inode_no(dir_ent->inode);
if(type == SQUASHFS_FILE_TYPE) {
int i;
struct squashfs_reg_inode_header *reg = &inode_header.reg;
size_t off = offsetof(struct squashfs_reg_inode_header, block_list);
inode = get_inode(sizeof(*reg) + offset * sizeof(unsigned int));
reg->file_size = byte_size;
reg->start_block = start_block;
reg->fragment = fragment->index;
reg->offset = fragment->offset;
SQUASHFS_SWAP_REG_INODE_HEADER(reg, inode);
SQUASHFS_SWAP_INTS(block_list, inode + off, offset);
TRACE("File inode, file_size %lld, start_block 0x%llx, blocks "
"%d, fragment %d, offset %d, size %d\n", byte_size,
start_block, offset, fragment->index, fragment->offset,
fragment->size);
for(i = 0; i < offset; i++)
TRACE("Block %d, size %d\n", i, block_list[i]);
}
else if(type == SQUASHFS_LREG_TYPE) {
int i;
struct squashfs_lreg_inode_header *reg = &inode_header.lreg;
size_t off = offsetof(struct squashfs_lreg_inode_header, block_list);
inode = get_inode(sizeof(*reg) + offset * sizeof(unsigned int));
reg->nlink = nlink;
reg->file_size = byte_size;
reg->start_block = start_block;
reg->fragment = fragment->index;
reg->offset = fragment->offset;
if(sparse && sparse >= byte_size)
sparse = byte_size - 1;
reg->sparse = sparse;
reg->xattr = xattr;
SQUASHFS_SWAP_LREG_INODE_HEADER(reg, inode);
SQUASHFS_SWAP_INTS(block_list, inode + off, offset);
TRACE("Long file inode, file_size %lld, start_block 0x%llx, "
"blocks %d, fragment %d, offset %d, size %d, nlink %d"
"\n", byte_size, start_block, offset, fragment->index,
fragment->offset, fragment->size, nlink);
for(i = 0; i < offset; i++)
TRACE("Block %d, size %d\n", i, block_list[i]);
}
else if(type == SQUASHFS_LDIR_TYPE) {
int i;
unsigned char *p;
struct squashfs_ldir_inode_header *dir = &inode_header.ldir;
struct cached_dir_index *index = dir_in->index;
unsigned int i_count = dir_in->i_count;
unsigned int i_size = dir_in->i_size;
if(byte_size >= 1 << 27)
BAD_ERROR("directory greater than 2^27-1 bytes!\n");
inode = get_inode(sizeof(*dir) + i_size);
dir->inode_type = SQUASHFS_LDIR_TYPE;
dir->nlink = dir_ent->dir->directory_count + 2;
dir->file_size = byte_size;
dir->offset = offset;
dir->start_block = start_block;
dir->i_count = i_count;
dir->parent_inode = get_parent_no(dir_ent->our_dir);
dir->xattr = xattr;
SQUASHFS_SWAP_LDIR_INODE_HEADER(dir, inode);
p = inode + offsetof(struct squashfs_ldir_inode_header, index);
for(i = 0; i < i_count; i++) {
SQUASHFS_SWAP_DIR_INDEX(&index[i].index, p);
p += offsetof(struct squashfs_dir_index, name);
memcpy(p, index[i].name, index[i].index.size + 1);
p += index[i].index.size + 1;
}
TRACE("Long directory inode, file_size %lld, start_block "
"0x%llx, offset 0x%x, nlink %d\n", byte_size,
start_block, offset, dir_ent->dir->directory_count + 2);
}
else if(type == SQUASHFS_DIR_TYPE) {
struct squashfs_dir_inode_header *dir = &inode_header.dir;
inode = get_inode(sizeof(*dir));
dir->nlink = dir_ent->dir->directory_count + 2;
dir->file_size = byte_size;
dir->offset = offset;
dir->start_block = start_block;
dir->parent_inode = get_parent_no(dir_ent->our_dir);
SQUASHFS_SWAP_DIR_INODE_HEADER(dir, inode);
TRACE("Directory inode, file_size %lld, start_block 0x%llx, "
"offset 0x%x, nlink %d\n", byte_size, start_block,
offset, dir_ent->dir->directory_count + 2);
}
else if(type == SQUASHFS_CHRDEV_TYPE || type == SQUASHFS_BLKDEV_TYPE) {
struct squashfs_dev_inode_header *dev = &inode_header.dev;
unsigned int major = major(buf->st_rdev);
unsigned int minor = minor(buf->st_rdev);
if(major > 0xfff) {
ERROR("Major %d out of range in device node %s, "
"truncating to %d\n", major, filename,
major & 0xfff);
major &= 0xfff;
}
if(minor > 0xfffff) {
ERROR("Minor %d out of range in device node %s, "
"truncating to %d\n", minor, filename,
minor & 0xfffff);
minor &= 0xfffff;