errcode_t ext2fs_read_ext_attr(ext2_filsys fs, blk_t block, void *buf)
{
errcode_t retval;
retval = io_channel_read_blk(fs->io, block, 1, buf);
if (retval)
return retval;
#ifdef EXT2FS_ENABLE_SWAPFS
if ((fs->flags & (EXT2_FLAG_SWAP_BYTES|
EXT2_FLAG_SWAP_BYTES_READ)) != 0)
ext2fs_swap_ext_attr(fs, buf, buf);
#endif
return 0;
}
errcode_t ext2fs_write_ext_attr(ext2_filsys fs, blk_t block, void *inbuf)
{
errcode_t retval;
char *write_buf;
char *buf = NULL;
#ifdef EXT2FS_ENABLE_SWAPFS
if ((fs->flags & EXT2_FLAG_SWAP_BYTES) ||
(fs->flags & EXT2_FLAG_SWAP_BYTES_WRITE)) {
retval = ext2fs_get_mem(fs->blocksize, (void **) &buf);
if (retval)
return retval;
write_buf = buf;
ext2fs_swap_ext_attr(fs, buf, inbuf);
} else
#endif
write_buf = (char *) inbuf;
retval = io_channel_write_blk(fs->io, block, 1, write_buf);
if (buf)
ext2fs_free_mem((void **) &buf);
if (!retval)
ext2fs_mark_changed(fs);
return retval;
}
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);
}
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);
}
