/*
* Dump kernel configuration.
*/
static void
textdump_dump_config(struct dumperinfo *di)
{
u_int count, fullblocks, len;
len = strlen(kernconfstring);
textdump_mkustar(textdump_block_buffer, TAR_CONFIG_FILENAME, len);
(void)textdump_writenextblock(di, textdump_block_buffer);
/*
* Write out all full blocks directly from the string, and handle any
* left-over bits by copying it to out to the local buffer and
* zero-padding it.
*/
fullblocks = len / TEXTDUMP_BLOCKSIZE;
for (count = 0; count < fullblocks; count++)
(void)textdump_writenextblock(di, kernconfstring + count *
TEXTDUMP_BLOCKSIZE);
if (len % TEXTDUMP_BLOCKSIZE != 0) {
bzero(textdump_block_buffer, TEXTDUMP_BLOCKSIZE);
bcopy(kernconfstring + count * TEXTDUMP_BLOCKSIZE,
textdump_block_buffer, len % TEXTDUMP_BLOCKSIZE);
(void)textdump_writenextblock(di, textdump_block_buffer);
}
}
/*
* Dump kernel message buffer.
*/
static void
textdump_dump_msgbuf(struct dumperinfo *di)
{
off_t end_offset, tarhdr_offset;
u_int i, len, offset, seq, total_len;
char buf[16];
/*
* Write out a dummy tar header to advance the offset; we'll rewrite
* it later once we know the true size.
*/
textdump_saveoff(&tarhdr_offset);
textdump_mkustar(textdump_block_buffer, TAR_MSGBUF_FILENAME, 0);
(void)textdump_writenextblock(di, textdump_block_buffer);
/*
* Copy out the data in small chunks, but don't copy nuls that may be
* present if the message buffer has not yet completely filled at
* least once.
*/
total_len = 0;
offset = 0;
msgbuf_peekbytes(msgbufp, NULL, 0, &seq);
while ((len = msgbuf_peekbytes(msgbufp, buf, sizeof(buf), &seq)) > 0) {
for (i = 0; i < len; i++) {
if (buf[i] == '\0')
continue;
textdump_block_buffer[offset] = buf[i];
offset++;
if (offset != sizeof(textdump_block_buffer))
continue;
(void)textdump_writenextblock(di,
textdump_block_buffer);
total_len += offset;
offset = 0;
}
}
total_len += offset; /* Without the zero-padding. */
if (offset != 0) {
bzero(textdump_block_buffer + offset,
sizeof(textdump_block_buffer) - offset);
(void)textdump_writenextblock(di, textdump_block_buffer);
}
/*
* Rewrite tar header to reflect how much was actually written.
*/
textdump_saveoff(&end_offset);
textdump_restoreoff(tarhdr_offset);
textdump_mkustar(textdump_block_buffer, TAR_MSGBUF_FILENAME,
total_len);
(void)textdump_writenextblock(di, textdump_block_buffer);
textdump_restoreoff(end_offset);
}
/*
* Dump DDB(4) captured output (and resets capture buffers).
*/
void
db_capture_dump(struct dumperinfo *di)
{
u_int offset;
if (db_capture_bufoff == 0)
return;
db_capture_zeropad();
textdump_mkustar(textdump_block_buffer, DDB_CAPTURE_FILENAME,
db_capture_bufoff);
(void)textdump_writenextblock(di, textdump_block_buffer);
for (offset = 0; offset < db_capture_bufoff + db_capture_bufpadding;
offset += TEXTDUMP_BLOCKSIZE)
(void)textdump_writenextblock(di, db_capture_buf + offset);
db_capture_bufoff = 0;
db_capture_bufpadding = 0;
}
static void
textdump_dump_version(struct dumperinfo *di)
{
u_int len;
/*
* Write out tar header -- at most one block of version information.
*/
len = min(strlen(version), TEXTDUMP_BLOCKSIZE);
textdump_mkustar(textdump_block_buffer, TAR_VERSION_FILENAME, len);
(void)textdump_writenextblock(di, textdump_block_buffer);
/*
* Zero pad the version string and write out block.
*/
bzero(textdump_block_buffer, sizeof(textdump_block_buffer));
bcopy(version, textdump_block_buffer, len);
(void)textdump_writenextblock(di, textdump_block_buffer);
}
static void
textdump_dump_panic(struct dumperinfo *di)
{
u_int len;
/*
* Write out tar header -- we store up to one block of panic message.
*/
len = min(strlen(panicstr), TEXTDUMP_BLOCKSIZE);
textdump_mkustar(textdump_block_buffer, TAR_PANIC_FILENAME, len);
(void)textdump_writenextblock(di, textdump_block_buffer);
/*
* Zero-pad the panic string and write out block.
*/
bzero(textdump_block_buffer, sizeof(textdump_block_buffer));
bcopy(panicstr, textdump_block_buffer, len);
(void)textdump_writenextblock(di, textdump_block_buffer);
}
/*
* Commit text dump to disk.
*/
void
textdump_dumpsys(struct dumperinfo *di)
{
off_t dumplen, trailer_offset;
if (di->blocksize != TEXTDUMP_BLOCKSIZE) {
printf("Dump partition block size (%ju) not textdump "
"block size (%ju)", (uintmax_t)di->blocksize,
(uintmax_t)TEXTDUMP_BLOCKSIZE);
return;
}
/*
* We don't know a priori how large the dump will be, but we do know
* that we need to reserve space for metadata and that we need two
* dump headers. Also leave room for one ustar header and one block
* of data.
*/
if (di->mediasize < SIZEOF_METADATA + 2 * sizeof(kdh)) {
printf("Insufficient space on dump partition.\n");
return;
}
textdump_error = 0;
/*
* Position the start of the dump so that we'll write the kernel dump
* trailer immediately before the end of the partition, and then work
* our way back. We will rewrite this header later to reflect the
* true size if things go well.
*/
textdump_offset = di->mediasize - sizeof(kdh);
textdump_saveoff(&trailer_offset);
mkdumpheader(&kdh, TEXTDUMPMAGIC, KERNELDUMP_TEXT_VERSION, 0, TEXTDUMP_BLOCKSIZE);
(void)textdump_writenextblock(di, (char *)&kdh);
/*
* Write a series of files in ustar format.
*/
if (textdump_do_ddb)
db_capture_dump(di);
#ifdef INCLUDE_CONFIG_FILE
if (textdump_do_config)
textdump_dump_config(di);
#endif
if (textdump_do_msgbuf)
textdump_dump_msgbuf(di);
if (textdump_do_panic && panicstr != NULL)
textdump_dump_panic(di);
if (textdump_do_version)
textdump_dump_version(di);
/*
* Now that we know the true size, we can write out the header, then
* seek back to the end and rewrite the trailer with the correct
* size.
*/
dumplen = trailer_offset - (textdump_offset + TEXTDUMP_BLOCKSIZE);
mkdumpheader(&kdh, TEXTDUMPMAGIC, KERNELDUMP_TEXT_VERSION, dumplen,
TEXTDUMP_BLOCKSIZE);
(void)textdump_writenextblock(di, (char *)&kdh);
textdump_restoreoff(trailer_offset);
(void)textdump_writenextblock(di, (char *)&kdh);
/*
* Terminate the dump, report any errors, and clear the pending flag.
*/
if (textdump_error == 0)
(void)dump_write(di, NULL, 0, 0, 0);
if (textdump_error == ENOSPC)
printf("Insufficient space on dump partition\n");
else if (textdump_error != 0)
printf("Error %d writing dump\n", textdump_error);
else
printf("Textdump complete.\n");
textdump_pending = 0;
}
