void append_data_to_file(int inum, u8 *data, size_t size)
{
printf("append data file at num %i\n", inum);
inode *in = inode_at_num(inum);
printf("inode: num: %i, size: %i, blocks: %i, end addr: %i\n",
in->num, in->size, in->blocks, in->end_block);
block *cur_blk = block_from_num(in->end_block);
printf("block addr: %i\n", in->end_block);
int pos = in->size % BLOCK_SIZE;
int blocks = (pos + size) / BLOCK_SIZE;
int numbytes = BLOCK_SIZE - pos;
write_data_to_block(cur_blk, data, size, pos);
in->size += numbytes;
//printf("%i:",pos);
for (int i = 0; i < blocks; i++) {
alloc_blocks(in, 1);
cur_blk = block_from_num(in->end_block);
int pos = in->size % BLOCK_SIZE;
int numbytes = BLOCK_SIZE - pos;
write_data_to_block(cur_blk, data, numbytes, pos);
in->size += numbytes;
}
write_block_to_disk(cur_blk);
in->size += size;
write_inode_to_disk(in);
free(in);
free(cur_blk);
}
/*
* Write a Record to the block
*
* Returns: false on failure (none or partially written)
* true on success (all bytes written)
*
* and remainder returned in packet.
*
* We require enough room for the header, and we deal with
* two special cases. 1. Only part of the record may have
* been transferred the last time (when remainder is
* non-zero), and 2. The remaining bytes to write may not
* all fit into the block.
*/
bool write_record_to_block(DCR *dcr, DEV_RECORD *rec)
{
ssize_t n;
bool retval = false;
char buf1[100], buf2[100];
DEV_BLOCK *block = dcr->block;
/*
* After this point the record is in nrec not rec e.g. its either converted
* or is just a pointer to the same as the rec pointer being passed in.
*/
while (1) {
ASSERT(block->binbuf == (uint32_t)(block->bufp - block->buf));
ASSERT(block->buf_len >= block->binbuf);
Dmsg9(890, "%s() state=%d (%s) FI=%s SessId=%d Strm=%s len=%d "
"block_navail=%d remainder=%d\n",
__func__, rec->state, record_state_to_ascii(rec->state),
FI_to_ascii(buf1, rec->FileIndex), rec->VolSessionId,
stream_to_ascii(buf2, rec->Stream, rec->FileIndex), rec->data_len,
block_write_navail(block), rec->remainder);
switch (rec->state) {
case st_none:
/*
* Figure out what to do
*/
rec->state = st_header;
rec->remainder = rec->data_len; /* length of data remaining to write */
continue; /* goto st_header */
case st_header:
/*
* Write header
*/
n = write_header_to_block(block, rec, rec->Stream);
if (n < 0) {
/*
* the header did not fit into the block, so flush the current
* block and come back to st_header and try again on the next block.
*/
goto bail_out;
}
if (block_write_navail(block) == 0) {
/*
* The header fit, but no bytes of data will fit,
* so flush this block and start the next block with a
* continuation header.
*/
rec->state = st_header_cont;
goto bail_out;
}
/*
* The header fit, and at least one byte of data will fit,
* so move to the st_data state and start filling the block
* with data bytes
*/
rec->state = st_data;
continue;
case st_header_cont:
/*
* Write continuation header
*/
n = write_header_to_block(block, rec, -rec->Stream);
if (n < 0) {
/*
* The continuation header wouldn't fit, which is impossible
* unless something is broken
*/
Emsg0(M_ABORT, 0, _("couldn't write continuation header\n"));
}
/*
* After successfully writing a continuation header, we always start writing
* data, even if none will fit into this block.
*/
rec->state = st_data;
if (block_write_navail(block) == 0) {
/*
* The header fit, but no bytes of data will fit,
* so flush the block and start the next block with
* data bytes
*/
goto bail_out; /* Partial transfer */
}
continue;
case st_data:
/*
* Write normal data
*
* Part of it may have already been transferred, and we
* may not have enough room to transfer the whole this time.
*/
if (rec->remainder > 0) {
n = write_data_to_block(block, rec);
if (n < 0) {
/*
* error appending data to block should be impossible
* unless something is broken
*/
Emsg0(M_ABORT, 0, _("data write error\n"));
}
rec->remainder -= n;
if (rec->remainder > 0) {
/*
* Could not fit all of the data bytes into this block, so
* flush the current block, and start the next block with a
* continuation header
*/
rec->state = st_header_cont;
goto bail_out;
}
}
rec->remainder = 0; /* did whole transfer */
rec->state = st_none;
retval = true;
goto bail_out;
default:
Emsg1(M_ABORT, 0, _("Something went wrong. Unknown state %d.\n"), rec->state);
rec->state = st_none;
retval = true;
goto bail_out;
}
}
bail_out:
return retval;
}
/*
* Write a Record to the block
*
* Returns: false on failure (none or partially written)
* true on success (all bytes written)
*
* and remainder returned in packet.
*
* We require enough room for the header, and we deal with
* two special cases. 1. Only part of the record may have
* been transferred the last time (when remainder is
* non-zero), and 2. The remaining bytes to write may not
* all fit into the block.
*/
bool write_record_to_block(DCR *dcr, DEV_RECORD *rec)
{
bool retval = false;
char buf1[100], buf2[100];
DEV_BLOCK *block = dcr->block;
/*
* After this point the record is in nrec not rec e.g. its either converted
* or is just a pointer to the same as the rec pointer being passed in.
*/
while (1) {
ASSERT(block->binbuf == (uint32_t)(block->bufp - block->buf));
ASSERT(block->buf_len >= block->binbuf);
Dmsg6(890, "write_record_to_block() FI=%s SessId=%d Strm=%s len=%d\n"
"rem=%d remainder=%d\n",
FI_to_ascii(buf1, rec->FileIndex), rec->VolSessionId,
stream_to_ascii(buf2, rec->Stream, rec->FileIndex), rec->data_len,
rec->remlen, rec->remainder);
switch (rec->state) {
case st_none:
/*
* Figure out what to do
*/
rec->state = st_header;
continue; /* go to next state */
case st_header:
/*
* Write header
*
* If rec->remainder is non-zero, we have been called a
* second (or subsequent) time to finish writing a record
* that did not previously fit into the block.
*/
if (!write_header_to_block(block, rec)) {
goto bail_out; /* write block then come back here */
}
rec->state = st_data; /* after header, now write data */
continue;
/*
* Write continuation header
*/
case st_header_cont:
write_continue_header_to_block(block, rec);
rec->state = st_data;
if (rec->remlen == 0) {
goto bail_out; /* Partial transfer */
}
continue;
/*
* Write normal data
*/
case st_data:
/*
* Write data
*
* Part of it may have already been transferred, and we
* may not have enough room to transfer the whole this time.
*/
if (rec->remainder > 0) {
if (!write_data_to_block(block, rec)) {
rec->state = st_header_cont;
goto bail_out;
}
}
rec->remainder = 0; /* did whole transfer */
rec->state = st_none;
retval = true;
goto bail_out;
default:
Dmsg0(000, "Something went wrong. Default state.\n");
rec->state = st_none;
retval = true;
goto bail_out;
}
}
bail_out:
return retval;
}