void
write_data(fsinfo_t *fsopts, fsnode *node, unsigned char *buf, size_t len,
uint32_t ofs)
{
struct chfs_flash_data_node fdata;
memset(&fdata, 0, sizeof(fdata));
if (len == 0) {
return;
}
pad_block_if_less_than(fsopts, sizeof(fdata) + len);
fdata.magic = htole16(CHFS_FS_MAGIC_BITMASK);
fdata.type = htole16(CHFS_NODETYPE_DATA);
fdata.length = htole32(CHFS_PAD(sizeof(fdata) + len));
fdata.hdr_crc = htole32(crc32(0, (uint8_t *)&fdata,
CHFS_NODE_HDR_SIZE - 4));
fdata.vno = htole64(node->inode->ino);
fdata.data_length = htole32(len);
fdata.offset = htole32(ofs);
fdata.data_crc = htole32(crc32(0, (uint8_t *)buf, len));
fdata.node_crc = htole32(crc32(0,
(uint8_t *)&fdata, sizeof(fdata) - 4));
buf_write(fsopts, &fdata, sizeof(fdata));
buf_write(fsopts, buf, len);
padword(fsopts);
}
void
write_vnode(fsinfo_t *fsopts, fsnode *node)
{
struct chfs_flash_vnode fvnode;
memset(&fvnode, 0, sizeof(fvnode));
fvnode.magic = htole16(CHFS_FS_MAGIC_BITMASK);
fvnode.type = htole16(CHFS_NODETYPE_VNODE);
fvnode.length = htole32(CHFS_PAD(sizeof(fvnode)));
fvnode.hdr_crc = htole32(crc32(0, (uint8_t *)&fvnode,
CHFS_NODE_HDR_SIZE - 4));
fvnode.vno = htole64(node->inode->ino);
fvnode.version = htole64(version++);
fvnode.mode = htole32(node->inode->st.st_mode);
fvnode.dn_size = htole32(node->inode->st.st_size);
fvnode.atime = htole32(node->inode->st.st_atime);
fvnode.ctime = htole32(node->inode->st.st_ctime);
fvnode.mtime = htole32(node->inode->st.st_mtime);
fvnode.gid = htole32(node->inode->st.st_uid);
fvnode.uid = htole32(node->inode->st.st_gid);
fvnode.node_crc = htole32(crc32(0, (uint8_t *)&fvnode,
sizeof(fvnode) - 4));
pad_block_if_less_than(fsopts, sizeof(fvnode));
buf_write(fsopts, &fvnode, sizeof(fvnode));
padword(fsopts);
}
void
write_dirent(fsinfo_t *fsopts, fsnode *node)
{
struct chfs_flash_dirent_node fdirent;
char *name;
name = emalloc(strlen(node->name));
memcpy(name, node->name, strlen(node->name));
memset(&fdirent, 0, sizeof(fdirent));
fdirent.magic = htole16(CHFS_FS_MAGIC_BITMASK);
fdirent.type = htole16(CHFS_NODETYPE_DIRENT);
fdirent.length = htole32(CHFS_PAD(sizeof(fdirent) + strlen(name)));
fdirent.hdr_crc = htole32(crc32(0, (uint8_t *)&fdirent,
CHFS_NODE_HDR_SIZE - 4));
fdirent.vno = htole64(node->inode->ino);
if (node->parent != NULL) {
fdirent.pvno = htole64(node->parent->inode->ino);
} else {
fdirent.pvno = htole64(node->inode->ino);
}
fdirent.version = htole64(version++);
fdirent.mctime = 0;
fdirent.nsize = htole32(strlen(name));
fdirent.dtype = htole32(IFTOCHT(node->type & S_IFMT));
fdirent.name_crc = htole32(crc32(0, (uint8_t *)name, fdirent.nsize));
fdirent.node_crc = htole32(crc32(0, (uint8_t *)&fdirent,
sizeof(fdirent) - 4));
pad_block_if_less_than(fsopts, sizeof(fdirent) + fdirent.nsize);
buf_write(fsopts, &fdirent, sizeof(fdirent));
buf_write(fsopts, name, fdirent.nsize);
padword(fsopts);
}
/*
* chfs_check_td_data - checks the data CRC of the node
*
* Returns: 0 - if everything OK;
* 1 - if CRC is incorrect;
* 2 - else;
* error code if an error occured.
*/
int
chfs_check_td_data(struct chfs_mount *chmp,
struct chfs_tmp_dnode *td)
{
int err;
size_t retlen, len, totlen;
uint32_t crc;
uint64_t ofs;
char *buf;
struct chfs_node_ref *nref = td->node->nref;
KASSERT(mutex_owned(&chmp->chm_lock_mountfields));
KASSERT(!mutex_owned(&chmp->chm_lock_sizes));
ofs = CHFS_GET_OFS(nref->nref_offset) + sizeof(struct chfs_flash_data_node);
len = td->node->size;
if (!len)
return 0;
/* Read data. */
buf = kmem_alloc(len, KM_SLEEP);
if (!buf) {
dbg("allocating error\n");
return 2;
}
err = chfs_read_leb(chmp, nref->nref_lnr, buf, ofs, len, &retlen);
if (err) {
dbg("error while reading: %d\n", err);
err = 2;
goto out;
}
/* Check crc. */
if (len != retlen) {
dbg("len:%zu, retlen:%zu\n", len, retlen);
err = 2;
goto out;
}
crc = crc32(0, (uint8_t *)buf, len);
if (crc != td->data_crc) {
dbg("crc failed, calculated: 0x%x, orig: 0x%x\n", crc, td->data_crc);
kmem_free(buf, len);
return 1;
}
/* Correct sizes. */
CHFS_MARK_REF_NORMAL(nref);
totlen = CHFS_PAD(sizeof(struct chfs_flash_data_node) + len);
mutex_enter(&chmp->chm_lock_sizes);
chfs_change_size_unchecked(chmp, &chmp->chm_blocks[nref->nref_lnr], -totlen);
chfs_change_size_used(chmp, &chmp->chm_blocks[nref->nref_lnr], totlen);
mutex_exit(&chmp->chm_lock_sizes);
KASSERT(chmp->chm_blocks[nref->nref_lnr].used_size <= chmp->chm_ebh->eb_size);
err = 0;
out:
kmem_free(buf, len);
return err;
}