void ext2fs_swap_mmp(struct mmp_struct *mmp) { mmp->mmp_magic = ext2fs_swab32(mmp->mmp_magic); mmp->mmp_seq = ext2fs_swab32(mmp->mmp_seq); mmp->mmp_time = ext2fs_swab64(mmp->mmp_time); mmp->mmp_check_interval = ext2fs_swab16(mmp->mmp_check_interval); }
void ext2fs_swap_ext_attr_entry(struct ext2_ext_attr_entry *to_entry, struct ext2_ext_attr_entry *from_entry) { to_entry->e_value_offs = ext2fs_swab16(from_entry->e_value_offs); to_entry->e_value_block = ext2fs_swab32(from_entry->e_value_block); to_entry->e_value_size = ext2fs_swab32(from_entry->e_value_size); to_entry->e_hash = ext2fs_swab32(from_entry->e_hash); }
void ext2fs_swap_group_desc(struct ext2_group_desc *gdp) { gdp->bg_block_bitmap = ext2fs_swab32(gdp->bg_block_bitmap); gdp->bg_inode_bitmap = ext2fs_swab32(gdp->bg_inode_bitmap); gdp->bg_inode_table = ext2fs_swab32(gdp->bg_inode_table); gdp->bg_free_blocks_count = ext2fs_swab16(gdp->bg_free_blocks_count); gdp->bg_free_inodes_count = ext2fs_swab16(gdp->bg_free_inodes_count); gdp->bg_used_dirs_count = ext2fs_swab16(gdp->bg_used_dirs_count); }
void ext2fs_swap_ext_attr_header(struct ext2_ext_attr_header *to_header, struct ext2_ext_attr_header *from_header) { int n; to_header->h_magic = ext2fs_swab32(from_header->h_magic); to_header->h_blocks = ext2fs_swab32(from_header->h_blocks); to_header->h_refcount = ext2fs_swab32(from_header->h_refcount); to_header->h_hash = ext2fs_swab32(from_header->h_hash); for (n = 0; n < 4; n++) to_header->h_reserved[n] = ext2fs_swab32(from_header->h_reserved[n]); }
errcode_t ext2fs_read_ind_block(ext2_filsys fs, blk_t blk, void *buf) { errcode_t retval; #ifdef EXT2FS_ENABLE_SWAPFS blk_t *block_nr; int i; int limit = fs->blocksize >> 2; #endif if ((fs->flags & EXT2_FLAG_IMAGE_FILE) && (fs->io != fs->image_io)) memset(buf, 0, fs->blocksize); else { retval = io_channel_read_blk(fs->io, blk, 1, buf); if (retval) return retval; } #ifdef EXT2FS_ENABLE_SWAPFS if (fs->flags & (EXT2_FLAG_SWAP_BYTES | EXT2_FLAG_SWAP_BYTES_READ)) { block_nr = (blk_t *) buf; for (i = 0; i < limit; i++, block_nr++) *block_nr = ext2fs_swab32(*block_nr); } #endif return 0; }
STATIC __u16 ext2fs_group_desc_csum(ext2_filsys fs, dgrp_t group) { __u16 crc = 0; struct ext2_group_desc *desc; desc = &fs->group_desc[group]; if (fs->super->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_GDT_CSUM) { int offset = offsetof(struct ext2_group_desc, bg_checksum); #ifdef WORDS_BIGENDIAN struct ext2_group_desc swabdesc = *desc; ext2fs_swap_group_desc(&swabdesc); desc = &swabdesc; group = ext2fs_swab32(group); #endif crc = ext2fs_crc16(~0, fs->super->s_uuid, sizeof(fs->super->s_uuid)); crc = ext2fs_crc16(crc, &group, sizeof(group)); crc = ext2fs_crc16(crc, desc, offset); offset += sizeof(desc->bg_checksum); assert(offset == sizeof(*desc)); if (offset < fs->super->s_desc_size) { crc = ext2fs_crc16(crc, (char *)desc + offset, fs->super->s_desc_size - offset); } }
errcode_t ext2fs_write_dir_block(ext2_filsys fs, blk_t block, void *inbuf) { errcode_t retval; char *p, *end, *write_buf; char *buf = 0; struct ext2_dir_entry *dirent; if ((fs->flags & EXT2_FLAG_SWAP_BYTES) || (fs->flags & EXT2_FLAG_SWAP_BYTES_WRITE)) { write_buf = buf = malloc(fs->blocksize); if (!buf) return ENOMEM; memcpy(buf, inbuf, fs->blocksize); p = buf; end = buf + fs->blocksize; while (p < end) { dirent = (struct ext2_dir_entry *) p; p += (dirent->rec_len < 8) ? 8 : dirent->rec_len; dirent->inode = ext2fs_swab32(dirent->inode); dirent->rec_len = ext2fs_swab16(dirent->rec_len); dirent->name_len = ext2fs_swab16(dirent->name_len); } } else write_buf = inbuf; retval = io_channel_write_blk(fs->io, block, 1, write_buf); if (buf) free(buf); return retval; }
void print_csum(const char *msg, ext2_filsys fs, dgrp_t group) { __u16 crc1, crc2, crc3; dgrp_t swabgroup; struct ext2_group_desc *desc = &fs->group_desc[group]; struct ext2_super_block *sb = fs->super; #ifdef WORDS_BIGENDIAN struct ext2_group_desc swabdesc = fs->group_desc[group]; /* Have to swab back to little-endian to do the checksum */ ext2fs_swap_group_desc(&swabdesc); desc = &swabdesc; swabgroup = ext2fs_swab32(group); #else swabgroup = group; #endif crc1 = crc16(~0, sb->s_uuid, sizeof(fs->super->s_uuid)); crc2 = crc16(crc1, &swabgroup, sizeof(swabgroup)); crc3 = crc16(crc2, desc, offsetof(struct ext2_group_desc, bg_checksum)); printf("%s: UUID %016Lx%016Lx(%04x), grp %u(%04x): %04x=%04x\n", msg, *(long long *)&sb->s_uuid, *(long long *)&sb->s_uuid[8], crc1, group, crc2, crc3, ext2fs_group_desc_csum(fs, group)); }
int main(int argc, char **argv) { int i; int errors = 0; printf("Testing ext2fs_swab16\n"); i=0; do { printf("swab16(0x%04x) = 0x%04x\n", test1[i], ext2fs_swab16(test1[i])); if (ext2fs_swab16(test1[i]) != test1[i+1]) { printf("Error!!! %04x != %04x\n", ext2fs_swab16(test1[i]), test1[i+1]); errors++; } if (ext2fs_swab16(test1[i+1]) != test1[i]) { printf("Error!!! %04x != %04x\n", ext2fs_swab16(test1[i+1]), test1[i]); errors++; } i += 2; } while (test1[i] != 0); printf("Testing ext2fs_swab32\n"); i = 0; do { printf("swab32(0x%08x) = 0x%08x\n", test2[i], ext2fs_swab32(test2[i])); if (ext2fs_swab32(test2[i]) != test2[i+1]) { printf("Error!!! %04x != %04x\n", ext2fs_swab32(test2[i]), test2[i+1]); errors++; } if (ext2fs_swab32(test2[i+1]) != test2[i]) { printf("Error!!! %04x != %04x\n", ext2fs_swab32(test2[i+1]), test2[i]); errors++; } i += 2; } while (test2[i] != 0); if (!errors) printf("No errors found in the byteswap implementation!\n"); return errors; }
static void ext2fs_swap_bitmap(ext2fs_generic_bitmap bmap) { __u32 *p = (__u32 *) bmap->bitmap; int n, nbytes = (bmap->end - bmap->start + 7) / 8; for (n = nbytes / sizeof(__u32); n > 0; --n, ++p) *p = ext2fs_swab32(*p); }
static void ext2fs_swap_bitmap(ext2_filsys fs, char *bitmap, int nbytes) { __u32 *p = (__u32 *) bitmap; int n; for (n = nbytes / sizeof(__u32); n > 0; --n, ++p) *p = ext2fs_swab32(*p); }
void ext2fs_swap_group_desc2(ext2_filsys fs, struct ext2_group_desc *gdp) { /* Do the 32-bit parts first */ gdp->bg_block_bitmap = ext2fs_swab32(gdp->bg_block_bitmap); gdp->bg_inode_bitmap = ext2fs_swab32(gdp->bg_inode_bitmap); gdp->bg_inode_table = ext2fs_swab32(gdp->bg_inode_table); gdp->bg_free_blocks_count = ext2fs_swab16(gdp->bg_free_blocks_count); gdp->bg_free_inodes_count = ext2fs_swab16(gdp->bg_free_inodes_count); gdp->bg_used_dirs_count = ext2fs_swab16(gdp->bg_used_dirs_count); gdp->bg_flags = ext2fs_swab16(gdp->bg_flags); gdp->bg_itable_unused = ext2fs_swab16(gdp->bg_itable_unused); gdp->bg_checksum = ext2fs_swab16(gdp->bg_checksum); /* If we're 32-bit, we're done */ if (fs && (!fs->super->s_desc_size || (fs->super->s_desc_size < EXT2_MIN_DESC_SIZE_64BIT))) return; /* Swap the 64-bit parts */ struct ext4_group_desc *gdp4 = (struct ext4_group_desc *) gdp; gdp4->bg_block_bitmap_hi = ext2fs_swab32(gdp4->bg_block_bitmap_hi); gdp4->bg_inode_bitmap_hi = ext2fs_swab32(gdp4->bg_inode_bitmap_hi); gdp4->bg_inode_table_hi = ext2fs_swab32(gdp4->bg_inode_table_hi); gdp4->bg_free_blocks_count_hi = ext2fs_swab16(gdp4->bg_free_blocks_count_hi); gdp4->bg_free_inodes_count_hi = ext2fs_swab16(gdp4->bg_free_inodes_count_hi); gdp4->bg_used_dirs_count_hi = ext2fs_swab16(gdp4->bg_used_dirs_count_hi); gdp4->bg_itable_unused_hi = ext2fs_swab16(gdp4->bg_itable_unused_hi); }
void ext2fs_swap_ext_attr(ext2_filsys fs, char *to, char *from) { struct ext2_ext_attr_header *from_header = (struct ext2_ext_attr_header *)from; struct ext2_ext_attr_header *to_header = (struct ext2_ext_attr_header *)to; struct ext2_ext_attr_entry *from_entry, *to_entry; char *from_end = (char *)from_header + fs->blocksize; int n; if (to_header != from_header) memcpy(to_header, from_header, fs->blocksize); to_header->h_magic = ext2fs_swab32(from_header->h_magic); to_header->h_blocks = ext2fs_swab32(from_header->h_blocks); to_header->h_refcount = ext2fs_swab32(from_header->h_refcount); for (n=0; n<4; n++) to_header->h_reserved[n] = ext2fs_swab32(from_header->h_reserved[n]); from_entry = (struct ext2_ext_attr_entry *)(from_header+1); to_entry = (struct ext2_ext_attr_entry *)(to_header+1); while ((char *)from_entry < from_end && *(__u32 *)from_entry) { to_entry->e_value_offs = ext2fs_swab16(from_entry->e_value_offs); to_entry->e_value_block = ext2fs_swab32(from_entry->e_value_block); to_entry->e_value_size = ext2fs_swab32(from_entry->e_value_size); from_entry = EXT2_EXT_ATTR_NEXT(from_entry); to_entry = EXT2_EXT_ATTR_NEXT(to_entry); } }
errcode_t ext2fs_write_dir_block2(ext2_filsys fs, blk_t block, void *inbuf, int flags EXT2FS_ATTR((unused))) { #if BB_BIG_ENDIAN int do_swap = 0; errcode_t retval; char *p, *end; char *buf = 0; struct ext2_dir_entry *dirent; if ((fs->flags & EXT2_FLAG_SWAP_BYTES) || (fs->flags & EXT2_FLAG_SWAP_BYTES_WRITE)) do_swap = 1; #ifndef WORDS_BIGENDIAN if (!do_swap) return io_channel_write_blk(fs->io, block, 1, (char *) inbuf); #endif retval = ext2fs_get_mem(fs->blocksize, &buf); if (retval) return retval; memcpy(buf, inbuf, fs->blocksize); p = buf; end = buf + fs->blocksize; while (p < end) { dirent = (struct ext2_dir_entry *) p; if ((dirent->rec_len < 8) || (dirent->rec_len % 4)) { ext2fs_free_mem(&buf); return EXT2_ET_DIR_CORRUPTED; } p += dirent->rec_len; if (do_swap) { dirent->inode = ext2fs_swab32(dirent->inode); dirent->rec_len = ext2fs_swab16(dirent->rec_len); dirent->name_len = ext2fs_swab16(dirent->name_len); } #ifdef WORDS_BIGENDIAN if (flags & EXT2_DIRBLOCK_V2_STRUCT) dirent->name_len = ext2fs_swab16(dirent->name_len); #endif } retval = io_channel_write_blk(fs->io, block, 1, buf); ext2fs_free_mem(&buf); return retval; #else return io_channel_write_blk(fs->io, block, 1, (char *) inbuf); #endif }
errcode_t ext2fs_read_dir_block2(ext2_filsys fs, blk_t block, void *buf, int flags EXT2FS_ATTR((unused))) { errcode_t retval; char *p, *end; struct ext2_dir_entry *dirent; unsigned int name_len, rec_len; #if BB_BIG_ENDIAN unsigned int do_swap; #endif retval = io_channel_read_blk(fs->io, block, 1, buf); if (retval) return retval; #if BB_BIG_ENDIAN do_swap = (fs->flags & (EXT2_FLAG_SWAP_BYTES| EXT2_FLAG_SWAP_BYTES_READ)) != 0; #endif p = (char *) buf; end = (char *) buf + fs->blocksize; while (p < end-8) { dirent = (struct ext2_dir_entry *) p; #if BB_BIG_ENDIAN if (do_swap) { dirent->inode = ext2fs_swab32(dirent->inode); dirent->rec_len = ext2fs_swab16(dirent->rec_len); dirent->name_len = ext2fs_swab16(dirent->name_len); } #endif name_len = dirent->name_len; #ifdef WORDS_BIGENDIAN if (flags & EXT2_DIRBLOCK_V2_STRUCT) dirent->name_len = ext2fs_swab16(dirent->name_len); #endif rec_len = dirent->rec_len; if ((rec_len < 8) || (rec_len % 4)) { rec_len = 8; retval = EXT2_ET_DIR_CORRUPTED; } if (((name_len & 0xFF) + 8) > dirent->rec_len) retval = EXT2_ET_DIR_CORRUPTED; p += rec_len; } return retval; }
errcode_t ext2fs_write_ind_block(ext2_filsys fs, blk_t blk, void *buf) { blk_t *block_nr; int i; int limit = fs->blocksize >> 2; if (fs->flags & EXT2_FLAG_IMAGE_FILE) return 0; #ifdef EXT2FS_ENABLE_SWAPFS if (fs->flags & (EXT2_FLAG_SWAP_BYTES | EXT2_FLAG_SWAP_BYTES_WRITE)) { block_nr = (blk_t *) buf; for (i = 0; i < limit; i++, block_nr++) *block_nr = ext2fs_swab32(*block_nr); } #endif return io_channel_write_blk(fs->io, blk, 1, buf); }
errcode_t ext2fs_write_ind_block(ext2_filsys fs, blk_t blk, void *buf) { #ifdef WORDS_BIGENDIAN blk_t *block_nr; int i; int limit = fs->blocksize >> 2; #endif if (fs->flags & EXT2_FLAG_IMAGE_FILE) return 0; #ifdef WORDS_BIGENDIAN block_nr = (blk_t *) buf; for (i = 0; i < limit; i++, block_nr++) *block_nr = ext2fs_swab32(*block_nr); #endif return io_channel_write_blk(fs->io, blk, 1, buf); }
__u16 ext2fs_group_desc_csum(ext2_filsys fs, dgrp_t group) { __u16 crc = 0; struct ext2_group_desc *desc; size_t size; size = fs->super->s_desc_size; if (size < EXT2_MIN_DESC_SIZE) size = EXT2_MIN_DESC_SIZE; if (size > sizeof(struct ext4_group_desc)) { printf("%s: illegal s_desc_size(%zd)\n", __func__, size); size = sizeof(struct ext4_group_desc); } desc = ext2fs_group_desc(fs, fs->group_desc, group); if (fs->super->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_GDT_CSUM) { size_t offset = offsetof(struct ext2_group_desc, bg_checksum); #ifdef WORDS_BIGENDIAN struct ext4_group_desc swabdesc; /* Have to swab back to little-endian to do the checksum */ memcpy(&swabdesc, desc, size); ext2fs_swap_group_desc2(fs, (struct ext2_group_desc *) &swabdesc); desc = (struct ext2_group_desc *) &swabdesc; group = ext2fs_swab32(group); #endif crc = ext2fs_crc16(~0, fs->super->s_uuid, sizeof(fs->super->s_uuid)); crc = ext2fs_crc16(crc, &group, sizeof(group)); crc = ext2fs_crc16(crc, desc, offset); offset += sizeof(desc->bg_checksum); /* skip checksum */ /* for checksum of struct ext4_group_desc do the rest...*/ if (offset < size) { crc = ext2fs_crc16(crc, (char *)desc + offset, size - offset); } }
errcode_t ext2fs_write_dir_block3(ext2_filsys fs, blk64_t block, void *inbuf, int flags EXT2FS_ATTR((unused))) { #ifdef WORDS_BIGENDIAN errcode_t retval; char *p, *end; char *buf = 0; unsigned int rec_len; struct ext2_dir_entry *dirent; retval = ext2fs_get_mem(fs->blocksize, &buf); if (retval) return retval; memcpy(buf, inbuf, fs->blocksize); p = buf; end = buf + fs->blocksize; while (p < end) { dirent = (struct ext2_dir_entry *) p; if ((retval = ext2fs_get_rec_len(fs, dirent, &rec_len)) != 0) return retval; if ((rec_len < 8) || (rec_len % 4)) { ext2fs_free_mem(&buf); return (EXT2_ET_DIR_CORRUPTED); } p += rec_len; dirent->inode = ext2fs_swab32(dirent->inode); dirent->rec_len = ext2fs_swab16(dirent->rec_len); dirent->name_len = ext2fs_swab16(dirent->name_len); if (flags & EXT2_DIRBLOCK_V2_STRUCT) dirent->name_len = ext2fs_swab16(dirent->name_len); } retval = io_channel_write_blk64(fs->io, block, 1, buf); ext2fs_free_mem(&buf); return retval; #else return io_channel_write_blk(fs->io, block, 1, (char *) inbuf); #endif }
errcode_t ext2fs_read_dir_block3(ext2_filsys fs, blk64_t block, void *buf, int flags EXT2FS_ATTR((unused))) { errcode_t retval; char *p, *end; struct ext2_dir_entry *dirent; unsigned int name_len, rec_len; retval = io_channel_read_blk64(fs->io, block, 1, buf); if (retval) return retval; p = (char *) buf; end = (char *) buf + fs->blocksize; while (p < end-8) { dirent = (struct ext2_dir_entry *) p; #ifdef WORDS_BIGENDIAN dirent->inode = ext2fs_swab32(dirent->inode); dirent->rec_len = ext2fs_swab16(dirent->rec_len); dirent->name_len = ext2fs_swab16(dirent->name_len); #endif name_len = dirent->name_len; #ifdef WORDS_BIGENDIAN if (flags & EXT2_DIRBLOCK_V2_STRUCT) dirent->name_len = ext2fs_swab16(dirent->name_len); #endif if ((retval = ext2fs_get_rec_len(fs, dirent, &rec_len)) != 0) return retval; if ((rec_len < 8) || (rec_len % 4)) { rec_len = 8; retval = EXT2_ET_DIR_CORRUPTED; } else if (((name_len & 0xFF) + 8) > rec_len) retval = EXT2_ET_DIR_CORRUPTED; p += rec_len; } return retval; }
errcode_t ext2fs_read_dir_block(ext2_filsys fs, blk_t block, void *buf) { errcode_t retval; char *p, *end; struct ext2_dir_entry *dirent; retval = io_channel_read_blk(fs->io, block, 1, buf); if (retval) return retval; if ((fs->flags & (EXT2_FLAG_SWAP_BYTES| EXT2_FLAG_SWAP_BYTES_READ)) == 0) return 0; p = buf; end = (char *) buf + fs->blocksize; while (p < end) { dirent = (struct ext2_dir_entry *) p; dirent->inode = ext2fs_swab32(dirent->inode); dirent->rec_len = ext2fs_swab16(dirent->rec_len); dirent->name_len = ext2fs_swab16(dirent->name_len); p += (dirent->rec_len < 8) ? 8 : dirent->rec_len; } return 0; }
void ext2fs_swap_inode(ext2_filsys fs, struct ext2_inode *t, struct ext2_inode *f, int hostorder) { unsigned i; int islnk = 0; if (hostorder && LINUX_S_ISLNK(f->i_mode)) islnk = 1; t->i_mode = ext2fs_swab16(f->i_mode); if (!hostorder && LINUX_S_ISLNK(t->i_mode)) islnk = 1; t->i_uid = ext2fs_swab16(f->i_uid); t->i_size = ext2fs_swab32(f->i_size); t->i_atime = ext2fs_swab32(f->i_atime); t->i_ctime = ext2fs_swab32(f->i_ctime); t->i_mtime = ext2fs_swab32(f->i_mtime); t->i_dtime = ext2fs_swab32(f->i_dtime); t->i_gid = ext2fs_swab16(f->i_gid); t->i_links_count = ext2fs_swab16(f->i_links_count); t->i_blocks = ext2fs_swab32(f->i_blocks); t->i_flags = ext2fs_swab32(f->i_flags); if (!islnk || f->i_blocks) { for (i = 0; i < EXT2_N_BLOCKS; i++) t->i_block[i] = ext2fs_swab32(f->i_block[i]); } else if (t != f) { for (i = 0; i < EXT2_N_BLOCKS; i++) t->i_block[i] = f->i_block[i]; } t->i_generation = ext2fs_swab32(f->i_generation); t->i_file_acl = ext2fs_swab32(f->i_file_acl); t->i_dir_acl = ext2fs_swab32(f->i_dir_acl); t->i_faddr = ext2fs_swab32(f->i_faddr); switch (fs->super->s_creator_os) { case EXT2_OS_LINUX: t->osd1.linux1.l_i_reserved1 = ext2fs_swab32(f->osd1.linux1.l_i_reserved1); t->osd2.linux2.l_i_frag = f->osd2.linux2.l_i_frag; t->osd2.linux2.l_i_fsize = f->osd2.linux2.l_i_fsize; t->osd2.linux2.i_pad1 = ext2fs_swab16(f->osd2.linux2.i_pad1); t->osd2.linux2.l_i_uid_high = ext2fs_swab16 (f->osd2.linux2.l_i_uid_high); t->osd2.linux2.l_i_gid_high = ext2fs_swab16 (f->osd2.linux2.l_i_gid_high); t->osd2.linux2.l_i_reserved2 = ext2fs_swab32(f->osd2.linux2.l_i_reserved2); break; case EXT2_OS_HURD: t->osd1.hurd1.h_i_translator = ext2fs_swab32 (f->osd1.hurd1.h_i_translator); t->osd2.hurd2.h_i_frag = f->osd2.hurd2.h_i_frag; t->osd2.hurd2.h_i_fsize = f->osd2.hurd2.h_i_fsize; t->osd2.hurd2.h_i_mode_high = ext2fs_swab16 (f->osd2.hurd2.h_i_mode_high); t->osd2.hurd2.h_i_uid_high = ext2fs_swab16 (f->osd2.hurd2.h_i_uid_high); t->osd2.hurd2.h_i_gid_high = ext2fs_swab16 (f->osd2.hurd2.h_i_gid_high); t->osd2.hurd2.h_i_author = ext2fs_swab32 (f->osd2.hurd2.h_i_author); break; case EXT2_OS_MASIX: t->osd1.masix1.m_i_reserved1 = ext2fs_swab32(f->osd1.masix1.m_i_reserved1); t->osd2.masix2.m_i_frag = f->osd2.masix2.m_i_frag; t->osd2.masix2.m_i_fsize = f->osd2.masix2.m_i_fsize; t->osd2.masix2.m_pad1 = ext2fs_swab16(f->osd2.masix2.m_pad1); t->osd2.masix2.m_i_reserved2[0] = ext2fs_swab32(f->osd2.masix2.m_i_reserved2[0]); t->osd2.masix2.m_i_reserved2[1] = ext2fs_swab32(f->osd2.masix2.m_i_reserved2[1]); break; } }
void ext2fs_swap_inode_full(ext2_filsys fs, struct ext2_inode_large *t, struct ext2_inode_large *f, int hostorder, int bufsize) { unsigned i; int islnk = 0; __u32 *eaf, *eat; if (hostorder && LINUX_S_ISLNK(f->i_mode)) islnk = 1; t->i_mode = ext2fs_swab16(f->i_mode); if (!hostorder && LINUX_S_ISLNK(t->i_mode)) islnk = 1; t->i_uid = ext2fs_swab16(f->i_uid); t->i_size = ext2fs_swab32(f->i_size); t->i_atime = ext2fs_swab32(f->i_atime); t->i_ctime = ext2fs_swab32(f->i_ctime); t->i_mtime = ext2fs_swab32(f->i_mtime); t->i_dtime = ext2fs_swab32(f->i_dtime); t->i_gid = ext2fs_swab16(f->i_gid); t->i_links_count = ext2fs_swab16(f->i_links_count); t->i_blocks = ext2fs_swab32(f->i_blocks); t->i_flags = ext2fs_swab32(f->i_flags); t->i_file_acl = ext2fs_swab32(f->i_file_acl); t->i_dir_acl = ext2fs_swab32(f->i_dir_acl); if (!islnk || ext2fs_inode_data_blocks(fs, (struct ext2_inode *)t)) { for (i = 0; i < EXT2_N_BLOCKS; i++) t->i_block[i] = ext2fs_swab32(f->i_block[i]); } else if (t != f) { for (i = 0; i < EXT2_N_BLOCKS; i++) t->i_block[i] = f->i_block[i]; } t->i_generation = ext2fs_swab32(f->i_generation); t->i_faddr = ext2fs_swab32(f->i_faddr); switch (fs->super->s_creator_os) { case EXT2_OS_LINUX: t->osd1.linux1.l_i_reserved1 = ext2fs_swab32(f->osd1.linux1.l_i_reserved1); t->osd2.linux2.l_i_frag = f->osd2.linux2.l_i_frag; t->osd2.linux2.l_i_fsize = f->osd2.linux2.l_i_fsize; t->osd2.linux2.i_pad1 = ext2fs_swab16(f->osd2.linux2.i_pad1); t->osd2.linux2.l_i_uid_high = ext2fs_swab16 (f->osd2.linux2.l_i_uid_high); t->osd2.linux2.l_i_gid_high = ext2fs_swab16 (f->osd2.linux2.l_i_gid_high); t->osd2.linux2.l_i_reserved2 = ext2fs_swab32(f->osd2.linux2.l_i_reserved2); break; case EXT2_OS_HURD: t->osd1.hurd1.h_i_translator = ext2fs_swab32 (f->osd1.hurd1.h_i_translator); t->osd2.hurd2.h_i_frag = f->osd2.hurd2.h_i_frag; t->osd2.hurd2.h_i_fsize = f->osd2.hurd2.h_i_fsize; t->osd2.hurd2.h_i_mode_high = ext2fs_swab16 (f->osd2.hurd2.h_i_mode_high); t->osd2.hurd2.h_i_uid_high = ext2fs_swab16 (f->osd2.hurd2.h_i_uid_high); t->osd2.hurd2.h_i_gid_high = ext2fs_swab16 (f->osd2.hurd2.h_i_gid_high); t->osd2.hurd2.h_i_author = ext2fs_swab32 (f->osd2.hurd2.h_i_author); break; case EXT2_OS_MASIX: t->osd1.masix1.m_i_reserved1 = ext2fs_swab32(f->osd1.masix1.m_i_reserved1); t->osd2.masix2.m_i_frag = f->osd2.masix2.m_i_frag; t->osd2.masix2.m_i_fsize = f->osd2.masix2.m_i_fsize; t->osd2.masix2.m_pad1 = ext2fs_swab16(f->osd2.masix2.m_pad1); t->osd2.masix2.m_i_reserved2[0] = ext2fs_swab32(f->osd2.masix2.m_i_reserved2[0]); t->osd2.masix2.m_i_reserved2[1] = ext2fs_swab32(f->osd2.masix2.m_i_reserved2[1]); break; } if (bufsize < (int) (sizeof(struct ext2_inode) + sizeof(__u16))) return; /* no i_extra_isize field */ t->i_extra_isize = ext2fs_swab16(f->i_extra_isize); if (t->i_extra_isize > EXT2_INODE_SIZE(fs->super) - sizeof(struct ext2_inode)) { /* this is error case: i_extra_size is too large */ return; } i = sizeof(struct ext2_inode) + t->i_extra_isize + sizeof(__u32); if (bufsize < (int) i) return; /* no space for EA magic */ eaf = (__u32 *) (((char *) f) + sizeof(struct ext2_inode) + f->i_extra_isize); if (ext2fs_swab32(*eaf) != EXT2_EXT_ATTR_MAGIC) return; /* it seems no magic here */ eat = (__u32 *) (((char *) t) + sizeof(struct ext2_inode) + f->i_extra_isize); *eat = ext2fs_swab32(*eaf); /* convert EA(s) */ ext2fs_swap_ext_attr((char *) (eat + 1), (char *) (eaf + 1), bufsize - sizeof(struct ext2_inode) - t->i_extra_isize - sizeof(__u32), 0); }
void ext2fs_swap_super(struct ext2_super_block * sb) { int i; sb->s_inodes_count = ext2fs_swab32(sb->s_inodes_count); sb->s_blocks_count = ext2fs_swab32(sb->s_blocks_count); sb->s_r_blocks_count = ext2fs_swab32(sb->s_r_blocks_count); sb->s_free_blocks_count = ext2fs_swab32(sb->s_free_blocks_count); sb->s_free_inodes_count = ext2fs_swab32(sb->s_free_inodes_count); sb->s_first_data_block = ext2fs_swab32(sb->s_first_data_block); sb->s_log_block_size = ext2fs_swab32(sb->s_log_block_size); sb->s_log_frag_size = ext2fs_swab32(sb->s_log_frag_size); sb->s_blocks_per_group = ext2fs_swab32(sb->s_blocks_per_group); sb->s_frags_per_group = ext2fs_swab32(sb->s_frags_per_group); sb->s_inodes_per_group = ext2fs_swab32(sb->s_inodes_per_group); sb->s_mtime = ext2fs_swab32(sb->s_mtime); sb->s_wtime = ext2fs_swab32(sb->s_wtime); sb->s_mnt_count = ext2fs_swab16(sb->s_mnt_count); sb->s_max_mnt_count = ext2fs_swab16(sb->s_max_mnt_count); sb->s_magic = ext2fs_swab16(sb->s_magic); sb->s_state = ext2fs_swab16(sb->s_state); sb->s_errors = ext2fs_swab16(sb->s_errors); sb->s_minor_rev_level = ext2fs_swab16(sb->s_minor_rev_level); sb->s_lastcheck = ext2fs_swab32(sb->s_lastcheck); sb->s_checkinterval = ext2fs_swab32(sb->s_checkinterval); sb->s_creator_os = ext2fs_swab32(sb->s_creator_os); sb->s_rev_level = ext2fs_swab32(sb->s_rev_level); sb->s_def_resuid = ext2fs_swab16(sb->s_def_resuid); sb->s_def_resgid = ext2fs_swab16(sb->s_def_resgid); sb->s_first_ino = ext2fs_swab32(sb->s_first_ino); sb->s_inode_size = ext2fs_swab16(sb->s_inode_size); sb->s_block_group_nr = ext2fs_swab16(sb->s_block_group_nr); sb->s_feature_compat = ext2fs_swab32(sb->s_feature_compat); sb->s_feature_incompat = ext2fs_swab32(sb->s_feature_incompat); sb->s_feature_ro_compat = ext2fs_swab32(sb->s_feature_ro_compat); sb->s_algorithm_usage_bitmap = ext2fs_swab32(sb->s_algorithm_usage_bitmap); sb->s_reserved_gdt_blocks = ext2fs_swab16(sb->s_reserved_gdt_blocks); sb->s_journal_inum = ext2fs_swab32(sb->s_journal_inum); sb->s_journal_dev = ext2fs_swab32(sb->s_journal_dev); sb->s_last_orphan = ext2fs_swab32(sb->s_last_orphan); sb->s_default_mount_opts = ext2fs_swab32(sb->s_default_mount_opts); sb->s_first_meta_bg = ext2fs_swab32(sb->s_first_meta_bg); sb->s_mkfs_time = ext2fs_swab32(sb->s_mkfs_time); for (i=0; i < 4; i++) sb->s_hash_seed[i] = ext2fs_swab32(sb->s_hash_seed[i]); for (i=0; i < 17; i++) sb->s_jnl_blocks[i] = ext2fs_swab32(sb->s_jnl_blocks[i]); }
void ext2fs_swap_super(struct ext2_super_block * sb) { int i; sb->s_inodes_count = ext2fs_swab32(sb->s_inodes_count); sb->s_blocks_count = ext2fs_swab32(sb->s_blocks_count); sb->s_r_blocks_count = ext2fs_swab32(sb->s_r_blocks_count); sb->s_free_blocks_count = ext2fs_swab32(sb->s_free_blocks_count); sb->s_free_inodes_count = ext2fs_swab32(sb->s_free_inodes_count); sb->s_first_data_block = ext2fs_swab32(sb->s_first_data_block); sb->s_log_block_size = ext2fs_swab32(sb->s_log_block_size); sb->s_log_frag_size = ext2fs_swab32(sb->s_log_frag_size); sb->s_blocks_per_group = ext2fs_swab32(sb->s_blocks_per_group); sb->s_frags_per_group = ext2fs_swab32(sb->s_frags_per_group); sb->s_inodes_per_group = ext2fs_swab32(sb->s_inodes_per_group); sb->s_mtime = ext2fs_swab32(sb->s_mtime); sb->s_wtime = ext2fs_swab32(sb->s_wtime); sb->s_mnt_count = ext2fs_swab16(sb->s_mnt_count); sb->s_max_mnt_count = ext2fs_swab16(sb->s_max_mnt_count); sb->s_magic = ext2fs_swab16(sb->s_magic); sb->s_state = ext2fs_swab16(sb->s_state); sb->s_errors = ext2fs_swab16(sb->s_errors); sb->s_minor_rev_level = ext2fs_swab16(sb->s_minor_rev_level); sb->s_lastcheck = ext2fs_swab32(sb->s_lastcheck); sb->s_checkinterval = ext2fs_swab32(sb->s_checkinterval); sb->s_creator_os = ext2fs_swab32(sb->s_creator_os); sb->s_rev_level = ext2fs_swab32(sb->s_rev_level); sb->s_def_resuid = ext2fs_swab16(sb->s_def_resuid); sb->s_def_resgid = ext2fs_swab16(sb->s_def_resgid); sb->s_first_ino = ext2fs_swab32(sb->s_first_ino); sb->s_inode_size = ext2fs_swab16(sb->s_inode_size); sb->s_block_group_nr = ext2fs_swab16(sb->s_block_group_nr); sb->s_feature_compat = ext2fs_swab32(sb->s_feature_compat); sb->s_feature_incompat = ext2fs_swab32(sb->s_feature_incompat); sb->s_feature_ro_compat = ext2fs_swab32(sb->s_feature_ro_compat); sb->s_algorithm_usage_bitmap = ext2fs_swab32(sb->s_algorithm_usage_bitmap); sb->s_reserved_gdt_blocks = ext2fs_swab16(sb->s_reserved_gdt_blocks); sb->s_journal_inum = ext2fs_swab32(sb->s_journal_inum); sb->s_journal_dev = ext2fs_swab32(sb->s_journal_dev); sb->s_last_orphan = ext2fs_swab32(sb->s_last_orphan); sb->s_desc_size = ext2fs_swab16(sb->s_desc_size); sb->s_default_mount_opts = ext2fs_swab32(sb->s_default_mount_opts); sb->s_first_meta_bg = ext2fs_swab32(sb->s_first_meta_bg); sb->s_mkfs_time = ext2fs_swab32(sb->s_mkfs_time); sb->s_blocks_count_hi = ext2fs_swab32(sb->s_blocks_count_hi); sb->s_r_blocks_count_hi = ext2fs_swab32(sb->s_r_blocks_count_hi); sb->s_free_blocks_hi = ext2fs_swab32(sb->s_free_blocks_hi); sb->s_min_extra_isize = ext2fs_swab16(sb->s_min_extra_isize); sb->s_want_extra_isize = ext2fs_swab16(sb->s_want_extra_isize); sb->s_flags = ext2fs_swab32(sb->s_flags); sb->s_kbytes_written = ext2fs_swab64(sb->s_kbytes_written); for (i=0; i < 4; i++) sb->s_hash_seed[i] = ext2fs_swab32(sb->s_hash_seed[i]); /* if journal backup is for a valid extent-based journal... */ if (!ext2fs_extent_header_verify(sb->s_jnl_blocks, sizeof(sb->s_jnl_blocks))) { /* ... swap only the journal i_size */ sb->s_jnl_blocks[16] = ext2fs_swab32(sb->s_jnl_blocks[16]); /* and the extent data is not swapped on read */ return; } /* direct/indirect journal: swap it all */ for (i=0; i < 17; i++) sb->s_jnl_blocks[i] = ext2fs_swab32(sb->s_jnl_blocks[i]); }
void ext2fs_swap_super(struct ext2_super_block * sb) { int i; sb->s_inodes_count = ext2fs_swab32(sb->s_inodes_count); sb->s_blocks_count = ext2fs_swab32(sb->s_blocks_count); sb->s_r_blocks_count = ext2fs_swab32(sb->s_r_blocks_count); sb->s_free_blocks_count = ext2fs_swab32(sb->s_free_blocks_count); sb->s_free_inodes_count = ext2fs_swab32(sb->s_free_inodes_count); sb->s_first_data_block = ext2fs_swab32(sb->s_first_data_block); sb->s_log_block_size = ext2fs_swab32(sb->s_log_block_size); sb->s_log_frag_size = ext2fs_swab32(sb->s_log_frag_size); sb->s_blocks_per_group = ext2fs_swab32(sb->s_blocks_per_group); sb->s_frags_per_group = ext2fs_swab32(sb->s_frags_per_group); sb->s_inodes_per_group = ext2fs_swab32(sb->s_inodes_per_group); sb->s_mtime = ext2fs_swab32(sb->s_mtime); sb->s_wtime = ext2fs_swab32(sb->s_wtime); sb->s_mnt_count = ext2fs_swab16(sb->s_mnt_count); sb->s_max_mnt_count = ext2fs_swab16(sb->s_max_mnt_count); sb->s_magic = ext2fs_swab16(sb->s_magic); sb->s_state = ext2fs_swab16(sb->s_state); sb->s_errors = ext2fs_swab16(sb->s_errors); sb->s_minor_rev_level = ext2fs_swab16(sb->s_minor_rev_level); sb->s_lastcheck = ext2fs_swab32(sb->s_lastcheck); sb->s_checkinterval = ext2fs_swab32(sb->s_checkinterval); sb->s_creator_os = ext2fs_swab32(sb->s_creator_os); sb->s_rev_level = ext2fs_swab32(sb->s_rev_level); sb->s_def_resuid = ext2fs_swab16(sb->s_def_resuid); sb->s_def_resgid = ext2fs_swab16(sb->s_def_resgid); sb->s_first_ino = ext2fs_swab32(sb->s_first_ino); sb->s_inode_size = ext2fs_swab16(sb->s_inode_size); sb->s_block_group_nr = ext2fs_swab16(sb->s_block_group_nr); sb->s_feature_compat = ext2fs_swab32(sb->s_feature_compat); sb->s_feature_incompat = ext2fs_swab32(sb->s_feature_incompat); sb->s_feature_ro_compat = ext2fs_swab32(sb->s_feature_ro_compat); sb->s_algorithm_usage_bitmap = ext2fs_swab32(sb->s_algorithm_usage_bitmap); sb->s_reserved_gdt_blocks = ext2fs_swab16(sb->s_reserved_gdt_blocks); sb->s_journal_inum = ext2fs_swab32(sb->s_journal_inum); sb->s_journal_dev = ext2fs_swab32(sb->s_journal_dev); sb->s_last_orphan = ext2fs_swab32(sb->s_last_orphan); sb->s_desc_size = ext2fs_swab16(sb->s_desc_size); sb->s_default_mount_opts = ext2fs_swab32(sb->s_default_mount_opts); sb->s_first_meta_bg = ext2fs_swab32(sb->s_first_meta_bg); sb->s_mkfs_time = ext2fs_swab32(sb->s_mkfs_time); sb->s_blocks_count_hi = ext2fs_swab32(sb->s_blocks_count_hi); sb->s_r_blocks_count_hi = ext2fs_swab32(sb->s_r_blocks_count_hi); sb->s_free_blocks_hi = ext2fs_swab32(sb->s_free_blocks_hi); sb->s_min_extra_isize = ext2fs_swab16(sb->s_min_extra_isize); sb->s_want_extra_isize = ext2fs_swab16(sb->s_want_extra_isize); sb->s_flags = ext2fs_swab32(sb->s_flags); sb->s_kbytes_written = ext2fs_swab64(sb->s_kbytes_written); sb->s_snapshot_inum = ext2fs_swab32(sb->s_snapshot_inum); sb->s_snapshot_id = ext2fs_swab32(sb->s_snapshot_id); sb->s_snapshot_r_blocks_count = ext2fs_swab64(sb->s_snapshot_r_blocks_count); sb->s_snapshot_list = ext2fs_swab32(sb->s_snapshot_list); for (i=0; i < 4; i++) sb->s_hash_seed[i] = ext2fs_swab32(sb->s_hash_seed[i]); if (!ext2fs_extent_header_verify(sb->s_jnl_blocks, sizeof(sb->s_jnl_blocks))) { sb->s_jnl_blocks[16] = ext2fs_swab32(sb->s_jnl_blocks[16]); return; } for (i=0; i < 17; i++) sb->s_jnl_blocks[i] = ext2fs_swab32(sb->s_jnl_blocks[i]); }
void ext2fs_swap_inode_full(ext2_filsys fs, struct ext2_inode_large *t, struct ext2_inode_large *f, int hostorder, int bufsize) { unsigned i, has_data_blocks, extra_isize, attr_magic; int has_extents = 0; int islnk = 0; __u32 *eaf, *eat; if (hostorder && LINUX_S_ISLNK(f->i_mode)) islnk = 1; t->i_mode = ext2fs_swab16(f->i_mode); if (!hostorder && LINUX_S_ISLNK(t->i_mode)) islnk = 1; t->i_uid = ext2fs_swab16(f->i_uid); t->i_size = ext2fs_swab32(f->i_size); t->i_atime = ext2fs_swab32(f->i_atime); t->i_ctime = ext2fs_swab32(f->i_ctime); t->i_mtime = ext2fs_swab32(f->i_mtime); t->i_dtime = ext2fs_swab32(f->i_dtime); t->i_gid = ext2fs_swab16(f->i_gid); t->i_links_count = ext2fs_swab16(f->i_links_count); t->i_file_acl = ext2fs_swab32(f->i_file_acl); if (hostorder) has_data_blocks = ext2fs_inode_data_blocks(fs, (struct ext2_inode *) f); t->i_blocks = ext2fs_swab32(f->i_blocks); if (!hostorder) has_data_blocks = ext2fs_inode_data_blocks(fs, (struct ext2_inode *) t); if (hostorder && (f->i_flags & EXT4_EXTENTS_FL)) has_extents = 1; t->i_flags = ext2fs_swab32(f->i_flags); if (!hostorder && (t->i_flags & EXT4_EXTENTS_FL)) has_extents = 1; t->i_dir_acl = ext2fs_swab32(f->i_dir_acl); if (!has_extents && (!islnk || has_data_blocks)) { for (i = 0; i < EXT2_N_BLOCKS; i++) t->i_block[i] = ext2fs_swab32(f->i_block[i]); } else if (t != f) { for (i = 0; i < EXT2_N_BLOCKS; i++) t->i_block[i] = f->i_block[i]; } t->i_generation = ext2fs_swab32(f->i_generation); t->i_faddr = ext2fs_swab32(f->i_faddr); switch (fs->super->s_creator_os) { case EXT2_OS_LINUX: t->osd1.linux1.l_i_version = ext2fs_swab32(f->osd1.linux1.l_i_version); t->osd2.linux2.l_i_blocks_hi = ext2fs_swab16(f->osd2.linux2.l_i_blocks_hi); t->osd2.linux2.l_i_file_acl_high = ext2fs_swab16(f->osd2.linux2.l_i_file_acl_high); t->osd2.linux2.l_i_uid_high = ext2fs_swab16 (f->osd2.linux2.l_i_uid_high); t->osd2.linux2.l_i_gid_high = ext2fs_swab16 (f->osd2.linux2.l_i_gid_high); t->osd2.linux2.l_i_reserved2 = ext2fs_swab32(f->osd2.linux2.l_i_reserved2); break; case EXT2_OS_HURD: t->osd1.hurd1.h_i_translator = ext2fs_swab32 (f->osd1.hurd1.h_i_translator); t->osd2.hurd2.h_i_frag = f->osd2.hurd2.h_i_frag; t->osd2.hurd2.h_i_fsize = f->osd2.hurd2.h_i_fsize; t->osd2.hurd2.h_i_mode_high = ext2fs_swab16 (f->osd2.hurd2.h_i_mode_high); t->osd2.hurd2.h_i_uid_high = ext2fs_swab16 (f->osd2.hurd2.h_i_uid_high); t->osd2.hurd2.h_i_gid_high = ext2fs_swab16 (f->osd2.hurd2.h_i_gid_high); t->osd2.hurd2.h_i_author = ext2fs_swab32 (f->osd2.hurd2.h_i_author); break; default: break; } if (bufsize < (int) (sizeof(struct ext2_inode) + sizeof(__u16))) return; if (hostorder) extra_isize = f->i_extra_isize; t->i_extra_isize = ext2fs_swab16(f->i_extra_isize); if (!hostorder) extra_isize = t->i_extra_isize; if (extra_isize > EXT2_INODE_SIZE(fs->super) - sizeof(struct ext2_inode)) { return; } i = sizeof(struct ext2_inode) + extra_isize + sizeof(__u32); if (bufsize < (int) i) return; eaf = (__u32 *) (((char *) f) + sizeof(struct ext2_inode) + extra_isize); attr_magic = *eaf; if (!hostorder) attr_magic = ext2fs_swab32(attr_magic); if (attr_magic != EXT2_EXT_ATTR_MAGIC) return; eat = (__u32 *) (((char *) t) + sizeof(struct ext2_inode) + extra_isize); *eat = ext2fs_swab32(*eaf); ext2fs_swap_ext_attr((char *) (eat + 1), (char *) (eaf + 1), bufsize - sizeof(struct ext2_inode) - extra_isize - sizeof(__u32), 0); }