static size_t logfs_write_header(struct logfs_super *super,
struct logfs_journal_header *jh, size_t datalen, u16 type)
{
size_t len = datalen;
return __logfs_write_header(super, jh, len, datalen, type, COMPR_NONE);
}
static size_t __logfs_write_je(struct super_block *sb, void *buf, u16 type,
size_t len)
{
struct logfs_super *super = logfs_super(sb);
void *header = super->s_compressed_je;
void *data = header + sizeof(struct logfs_journal_header);
ssize_t compr_len, pad_len;
u8 compr = COMPR_ZLIB;
if (len == 0)
return logfs_write_header(super, header, 0, type);
compr_len = logfs_compress(buf, data, len, sb->s_blocksize);
if (compr_len < 0 || type == JE_ANCHOR) {
BUG_ON(len > sb->s_blocksize);
memcpy(data, buf, len);
compr_len = len;
compr = COMPR_NONE;
}
pad_len = ALIGN(compr_len, 16);
memset(data + compr_len, 0, pad_len - compr_len);
return __logfs_write_header(super, header, compr_len, len, type, compr);
}