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sys/opencrypto/cryptodeflate.c

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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/ */
/* /*
* This file contains a wrapper around the deflate algo compression * This file contains a wrapper around the deflate algo compression
* functions using the zlib library (see libkern/zlib.c and sys/zlib.h}) * functions using the zlib library (see sys/contrib/zlib)
*/ */
#include <sys/cdefs.h> #include <sys/cdefs.h>
__FBSDID("$FreeBSD$"); __FBSDID("$FreeBSD$");
#include <sys/types.h> #include <sys/types.h>
#include <sys/param.h> #include <sys/param.h>
#include <sys/malloc.h> #include <sys/malloc.h>
#include <sys/param.h> #include <sys/param.h>
#include <sys/kernel.h> #include <sys/kernel.h>
#include <sys/sdt.h> #include <sys/sdt.h>
#include <sys/systm.h> #include <sys/systm.h>
#include <sys/zlib.h> #include <zlib.h>
#include <opencrypto/cryptodev.h> #include <opencrypto/cryptodev.h>
#include <opencrypto/deflate.h> #include <opencrypto/deflate.h>
SDT_PROVIDER_DECLARE(opencrypto); SDT_PROVIDER_DECLARE(opencrypto);
SDT_PROBE_DEFINE2(opencrypto, deflate, deflate_global, entry, SDT_PROBE_DEFINE2(opencrypto, z_deflate, deflate_global, entry,
"int", "u_int32_t"); "int", "u_int32_t");
SDT_PROBE_DEFINE5(opencrypto, deflate, deflate_global, bad, SDT_PROBE_DEFINE6(opencrypto, z_deflate, deflate_global, bad,
"int", "int", "int", "int", "int"); "int", "int", "int", "int", "int", "int");
SDT_PROBE_DEFINE5(opencrypto, deflate, deflate_global, iter, SDT_PROBE_DEFINE6(opencrypto, z_deflate, deflate_global, iter,
"int", "int", "int", "int", "int"); "int", "int", "int", "int", "int", "int");
SDT_PROBE_DEFINE2(opencrypto, deflate, deflate_global, return, SDT_PROBE_DEFINE2(opencrypto, z_deflate, deflate_global, return,
"int", "u_int32_t"); "int", "u_int32_t");
int window_inflate = -1 * MAX_WBITS; int window_inflate = -1 * MAX_WBITS;
int window_deflate = -12; int window_deflate = -12;
static void *
delphijAuthorUnsubmitted
Done
Inline Actions

the new line before crypto_zalloc() is not necessary.

delphij: the new line before crypto_zalloc() is not necessary.
crypto_zalloc(void *nil, u_int type, u_int size);
delphijAuthorUnsubmitted
Done
Inline Actions

[OPTIONAL] Personally I'd remove the variable names in prototype definition. Alternatively, you can move these functions' bodies here because these are static functions.

delphij: [OPTIONAL] Personally I'd remove the variable names in prototype definition. Alternatively…
ota_j.email.ne.jpUnsubmitted
Done
Inline Actions

I will move implementations here.

ota_j.email.ne.jp: I will move implementations here.
static void
crypto_zfree(void *nil, void *ptr);
/* /*
* This function takes a block of data and (de)compress it using the deflate * This function takes a block of data and (de)compress it using the deflate
* algorithm * algorithm
*/ */
u_int32_t u_int32_t
deflate_global(data, size, decomp, out) deflate_global(data, size, decomp, out)
u_int8_t *data; u_int8_t *data;
u_int32_t size; u_int32_t size;
int decomp; int decomp;
u_int8_t **out; u_int8_t **out;
{ {
/* decomp indicates whether we compress (0) or decompress (1) */ /* decomp indicates whether we compress (0) or decompress (1) */
z_stream zbuf; z_stream zbuf;
u_int8_t *output; u_int8_t *output;
u_int32_t count, result; u_int32_t count, result;
int error, i; int error, i;
struct deflate_buf *bufh, *bufp; struct deflate_buf *bufh, *bufp;
SDT_PROBE2(opencrypto, deflate, deflate_global, entry, decomp, size); SDT_PROBE2(opencrypto, z_deflate, deflate_global, entry, decomp, size);
bufh = bufp = NULL; bufh = bufp = NULL;
if (!decomp) { if (!decomp) {
i = 1; i = 1;
} else { } else {
/* /*
* Choose a buffer with 4x the size of the input buffer * Choose a buffer with 4x the size of the input buffer
* for the size of the output buffer in the case of * for the size of the output buffer in the case of
* decompression. If it's not sufficient, it will need to be * decompression. If it's not sufficient, it will need to be
* updated while the decompression is going on. * updated while the decompression is going on.
*/ */
i = 4; i = 4;
} }
/* /*
* Make sure we do have enough output space. Repeated calls to * Make sure we do have enough output space. Repeated calls to
* deflate need at least 6 bytes of output buffer space to avoid * deflate need at least 6 bytes of output buffer space to avoid
* repeated markers. We will always provide at least 16 bytes. * repeated markers. We will always provide at least 16 bytes.
*/ */
while ((size * i) < 16) while ((size * i) < 16)
i++; i++;
bufh = bufp = malloc(sizeof(*bufp) + (size_t)(size * i), bufh = bufp = malloc(sizeof(*bufp) + (size_t)(size * i),
M_CRYPTO_DATA, M_NOWAIT); M_CRYPTO_DATA, M_NOWAIT);
if (bufp == NULL) { if (bufp == NULL) {
SDT_PROBE5(opencrypto, deflate, deflate_global, bad, SDT_PROBE6(opencrypto, z_deflate, deflate_global, bad,
delphijAuthorUnsubmitted
Not Done
Inline Actions

I think the probes needs to match their definitions? (Also, is there some specific reason not to convert this to use new zlib?)

delphij: I think the probes needs to match their definitions? (Also, is there some specific reason not…
ota_j.email.ne.jpUnsubmitted
Done
Inline Actions

The probes need to be matching ABI, the binary symbol.
I can put cryptodefate changes together.
One of suggestion was break one large changeset into smaller ones; this one looks better be a part of this one to avoid changing probe names.

ota_j.email.ne.jp: The probes need to be matching ABI, the binary symbol. I can put cryptodefate changes together.
decomp, 0, __LINE__, 0, 0); decomp, 0, __LINE__, 0, 0, 0);
goto bad2; goto bad2;
} }
bufp->next = NULL; bufp->next = NULL;
bufp->size = size * i; bufp->size = size * i;
bzero(&zbuf, sizeof(z_stream)); bzero(&zbuf, sizeof(z_stream));
zbuf.zalloc = z_alloc; zbuf.zalloc = crypto_zalloc;
zbuf.zfree = z_free; zbuf.zfree = crypto_zfree;
zbuf.opaque = Z_NULL; zbuf.opaque = Z_NULL;
zbuf.next_in = data; /* Data that is going to be processed. */ zbuf.next_in = data; /* Data that is going to be processed. */
zbuf.avail_in = size; /* Total length of data to be processed. */ zbuf.avail_in = size; /* Total length of data to be processed. */
zbuf.next_out = bufp->data; zbuf.next_out = bufp->data;
zbuf.avail_out = bufp->size; zbuf.avail_out = bufp->size;
error = decomp ? inflateInit2(&zbuf, window_inflate) : error = decomp ? z_inflateInit2(&zbuf, window_inflate) :
deflateInit2(&zbuf, Z_DEFAULT_COMPRESSION, Z_METHOD, z_deflateInit2(&zbuf, Z_DEFAULT_COMPRESSION, Z_METHOD,
window_deflate, Z_MEMLEVEL, Z_DEFAULT_STRATEGY); window_deflate, Z_MEMLEVEL, Z_DEFAULT_STRATEGY);
if (error != Z_OK) { if (error != Z_OK) {
SDT_PROBE5(opencrypto, deflate, deflate_global, bad, SDT_PROBE6(opencrypto, z_deflate, deflate_global, bad,
decomp, error, __LINE__, 0, 0); decomp, error, __LINE__, 0, 0, 0);
goto bad; goto bad;
} }
for (;;) { for (;;) {
error = decomp ? inflate(&zbuf, Z_SYNC_FLUSH) : error = decomp ? z_inflate(&zbuf, Z_SYNC_FLUSH) :
deflate(&zbuf, Z_FINISH); z_deflate(&zbuf, Z_FINISH);
if (error != Z_OK && error != Z_STREAM_END) { if (error != Z_OK && error != Z_STREAM_END) {
/* SDT_PROBE6(opencrypto, z_deflate, deflate_global, bad,
* Unfortunately we are limited to 5 arguments,
* thus use two probes.
*/
SDT_PROBE5(opencrypto, deflate, deflate_global, bad,
decomp, error, __LINE__, decomp, error, __LINE__,
zbuf.avail_in, zbuf.avail_out); zbuf.avail_in, zbuf.avail_out, zbuf.total_out);
delphijAuthorUnsubmitted
Done
Inline Actions

'bad' is SDT_PROBE5. @markj have implemented additional parameters as of rS251166, maybe we should take this opportunity to separate bad compression/decompression from bad malloc and take advantage of SDT_PROBE6?

delphij: 'bad' is SDT_PROBE5. @markj have implemented additional parameters as of rS251166, maybe we…
SDT_PROBE5(opencrypto, deflate, deflate_global, bad,
decomp, error, __LINE__,
zbuf.state->dummy, zbuf.total_out);
goto bad; goto bad;
} }
SDT_PROBE5(opencrypto, deflate, deflate_global, iter, SDT_PROBE6(opencrypto, z_deflate, deflate_global, iter,
decomp, error, __LINE__, decomp, error, __LINE__,
zbuf.avail_in, zbuf.avail_out); zbuf.avail_in, zbuf.avail_out, zbuf.total_out);
SDT_PROBE5(opencrypto, deflate, deflate_global, iter,
decomp, error, __LINE__,
zbuf.state->dummy, zbuf.total_out);
if (decomp && zbuf.avail_in == 0 && error == Z_STREAM_END) { if (decomp && zbuf.avail_in == 0 && error == Z_STREAM_END) {
/* Done. */ /* Done. */
break; break;
} else if (!decomp && error == Z_STREAM_END) { } else if (!decomp && error == Z_STREAM_END) {
/* Done. */ /* Done. */
break; break;
} else if (zbuf.avail_out == 0) { } else if (zbuf.avail_out == 0) {
struct deflate_buf *p; struct deflate_buf *p;
/* We need more output space for another iteration. */ /* We need more output space for another iteration. */
p = malloc(sizeof(*p) + (size_t)(size * i), p = malloc(sizeof(*p) + (size_t)(size * i),
M_CRYPTO_DATA, M_NOWAIT); M_CRYPTO_DATA, M_NOWAIT);
if (p == NULL) { if (p == NULL) {
SDT_PROBE5(opencrypto, deflate, deflate_global, SDT_PROBE6(opencrypto, z_deflate, deflate_global,
bad, decomp, 0, __LINE__, 0, 0); bad, decomp, 0, __LINE__, 0, 0, 0);
goto bad; goto bad;
} }
p->next = NULL; p->next = NULL;
p->size = size * i; p->size = size * i;
bufp->next = p; bufp->next = p;
bufp = p; bufp = p;
zbuf.next_out = bufp->data; zbuf.next_out = bufp->data;
zbuf.avail_out = bufp->size; zbuf.avail_out = bufp->size;
} else { } else {
/* Unexpect result. */ /* Unexpect result. */
/* /*
* Unfortunately we are limited to 5 arguments, * Unfortunately we are limited to 5 arguments,
* thus, again, use two probes. * thus, again, use two probes.
*/ */
SDT_PROBE5(opencrypto, deflate, deflate_global, bad, SDT_PROBE6(opencrypto, z_deflate, deflate_global, bad,
decomp, error, __LINE__, decomp, error, __LINE__,
zbuf.avail_in, zbuf.avail_out); zbuf.avail_in, zbuf.avail_out, zbuf.total_out);
SDT_PROBE5(opencrypto, deflate, deflate_global, bad,
decomp, error, __LINE__,
zbuf.state->dummy, zbuf.total_out);
goto bad; goto bad;
} }
} }
result = count = zbuf.total_out; result = count = zbuf.total_out;
*out = malloc(result, M_CRYPTO_DATA, M_NOWAIT); *out = malloc(result, M_CRYPTO_DATA, M_NOWAIT);
if (*out == NULL) { if (*out == NULL) {
SDT_PROBE5(opencrypto, deflate, deflate_global, bad, SDT_PROBE6(opencrypto, z_deflate, deflate_global, bad,
decomp, 0, __LINE__, 0, 0); decomp, 0, __LINE__, 0, 0, 0);
goto bad; goto bad;
} }
if (decomp) if (decomp)
inflateEnd(&zbuf); z_inflateEnd(&zbuf);
else else
deflateEnd(&zbuf); z_deflateEnd(&zbuf);
output = *out; output = *out;
for (bufp = bufh; bufp != NULL; ) { for (bufp = bufh; bufp != NULL; ) {
if (count > bufp->size) { if (count > bufp->size) {
struct deflate_buf *p; struct deflate_buf *p;
bcopy(bufp->data, *out, bufp->size); bcopy(bufp->data, *out, bufp->size);
*out += bufp->size; *out += bufp->size;
count -= bufp->size; count -= bufp->size;
p = bufp; p = bufp;
bufp = bufp->next; bufp = bufp->next;
free(p, M_CRYPTO_DATA); free(p, M_CRYPTO_DATA);
} else { } else {
/* It should be the last buffer. */ /* It should be the last buffer. */
bcopy(bufp->data, *out, count); bcopy(bufp->data, *out, count);
*out += count; *out += count;
free(bufp, M_CRYPTO_DATA); free(bufp, M_CRYPTO_DATA);
bufp = NULL; bufp = NULL;
count = 0; count = 0;
} }
} }
*out = output; *out = output;
SDT_PROBE2(opencrypto, deflate, deflate_global, return, decomp, result); SDT_PROBE2(opencrypto, z_deflate, deflate_global, return, decomp, result);
return result; return result;
bad: bad:
if (decomp) if (decomp)
inflateEnd(&zbuf); z_inflateEnd(&zbuf);
else else
deflateEnd(&zbuf); z_deflateEnd(&zbuf);
for (bufp = bufh; bufp != NULL; ) { for (bufp = bufh; bufp != NULL; ) {
struct deflate_buf *p; struct deflate_buf *p;
p = bufp; p = bufp;
bufp = bufp->next; bufp = bufp->next;
free(p, M_CRYPTO_DATA); free(p, M_CRYPTO_DATA);
} }
bad2: bad2:
*out = NULL; *out = NULL;
return 0; return 0;
} }
void * void *
z_alloc(nil, type, size) crypto_zalloc(void *nil, u_int type, u_int size)
void *nil;
u_int type, size;
{ {
void *ptr; void *ptr;
ptr = malloc(type *size, M_CRYPTO_DATA, M_NOWAIT); ptr = malloc(type *size, M_CRYPTO_DATA, M_NOWAIT);
return ptr; return ptr;
} }
void void
z_free(nil, ptr) crypto_zfree(void *nil, void *ptr)
void *nil, *ptr;
{ {
free(ptr, M_CRYPTO_DATA); free(ptr, M_CRYPTO_DATA);
} }