aboutsummaryrefslogtreecommitdiffstats
path: root/erts/emulator/drivers/common/inet_drv.c
diff options
context:
space:
mode:
Diffstat (limited to 'erts/emulator/drivers/common/inet_drv.c')
-rw-r--r--erts/emulator/drivers/common/inet_drv.c97
1 files changed, 61 insertions, 36 deletions
diff --git a/erts/emulator/drivers/common/inet_drv.c b/erts/emulator/drivers/common/inet_drv.c
index c02a82372e..24d68b4027 100644
--- a/erts/emulator/drivers/common/inet_drv.c
+++ b/erts/emulator/drivers/common/inet_drv.c
@@ -632,15 +632,12 @@ static int my_strncasecmp(const char *s1, const char *s2, size_t n)
#define IS_BUSY(d) \
(((d)->state & INET_F_BUSY) == INET_F_BUSY)
+#define INET_MAX_OPT_BUFFER (64*1024)
+
#define INET_DEF_BUFFER 1460 /* default buffer size */
#define INET_MIN_BUFFER 1 /* internal min buffer */
-#define INET_MAX_BUFFER (1024*64) /* internal max buffer */
-/* Note: INET_HIGH_WATERMARK MUST be less than 2*INET_MAX_BUFFER */
#define INET_HIGH_WATERMARK (1024*8) /* 8k pending high => busy */
-/* Note: INET_LOW_WATERMARK MUST be less than INET_MAX_BUFFER and
-** less than INET_HIGH_WATERMARK
-*/
#define INET_LOW_WATERMARK (1024*4) /* 4k pending => allow more */
#define INET_INFINITY 0xffffffff /* infinity value */
@@ -1259,11 +1256,13 @@ static int load_ip_and_port
** Binary Buffer Managment
** We keep a stack of usable buffers
*/
-#define BUFFER_STACK_SIZE 15
+#define BUFFER_STACK_SIZE 14
+#define BUFFER_STACK_MAX_MEM_SIZE (1024*1024)
ErlDrvTSDKey buffer_stack_key;
typedef struct {
+ int mem_size;
int pos;
ErlDrvBinary* stk[BUFFER_STACK_SIZE];
} InetDrvBufStkBase;
@@ -1289,6 +1288,10 @@ static InetDrvBufStk *get_bufstk(void)
+ INET_DRV_CACHE_LINE_SIZE));
erl_drv_tsd_set(buffer_stack_key, bs);
bs->buf.pos = 0;
+ bs->buf.mem_size = 0;
+
+ ASSERT(bs == erl_drv_tsd_get(buffer_stack_key));
+
return bs;
}
@@ -1299,48 +1302,76 @@ static ErlDrvBinary* alloc_buffer(long minsz)
DEBUGF(("alloc_buffer: %ld\r\n", minsz));
if (bs && bs->buf.pos > 0) {
+ long size;
ErlDrvBinary* buf = bs->buf.stk[--bs->buf.pos];
- if (buf->orig_size >= minsz)
+ size = buf->orig_size;
+ bs->buf.mem_size -= size;
+ ASSERT(0 <= bs->buf.mem_size
+ && bs->buf.mem_size <= BUFFER_STACK_MAX_MEM_SIZE);
+ if (size >= minsz)
return buf;
driver_free_binary(buf);
}
+ ASSERT(!bs || bs->buf.pos != 0 || bs->buf.mem_size == 0);
+
return driver_alloc_binary(minsz);
}
-/*
-** Max buffer memory "cached" BUFFER_STACK_SIZE * INET_MAX_BUFFER
-** (16 * 64k ~ 1M)
-*/
/*#define CHECK_DOUBLE_RELEASE 1*/
+#ifdef CHECK_DOUBLE_RELEASE
+static void
+check_double_release(InetDrvBufStk *bs, ErlDrvBinary* buf)
+{
+#ifdef __GNUC__
+#warning CHECK_DOUBLE_RELEASE is enabled, this is a custom build emulator
+#endif
+ int i;
+ for (i = 0; i < bs->buf.pos; ++i) {
+ if (bs->buf.stk[i] == buf) {
+ erl_exit(ERTS_ABORT_EXIT,
+ "Multiple buffer release in inet_drv, this "
+ "is a bug, save the core and send it to "
+ "[email protected]!");
+ }
+ }
+}
+#endif
+
static void release_buffer(ErlDrvBinary* buf)
{
InetDrvBufStk *bs;
+ long size;
+
DEBUGF(("release_buffer: %ld\r\n", (buf==NULL) ? 0 : buf->orig_size));
+
if (!buf)
return;
+
+ size = buf->orig_size;
+
+ if (size > BUFFER_STACK_MAX_MEM_SIZE)
+ goto free_binary;
+
bs = get_bufstk();
- if ((buf->orig_size > INET_MAX_BUFFER)
- || !bs
+ if (!bs
+ || (bs->buf.mem_size + size > BUFFER_STACK_MAX_MEM_SIZE)
|| (bs->buf.pos >= BUFFER_STACK_SIZE)) {
+ free_binary:
driver_free_binary(buf);
}
else {
#ifdef CHECK_DOUBLE_RELEASE
-#ifdef __GNUC__
-#warning CHECK_DOUBLE_RELEASE is enabled, this is a custom build emulator
-#endif
- int i;
- for (i = 0; i < buffer_stack_pos; ++i) {
- if (buffer_stack[i] == buf) {
- erl_exit(1,"Multiple buffer release in inet_drv, this is a "
- "bug, save the core and send it to "
- "[email protected]!");
- }
- }
+ check_double_release(bs, buf);
#endif
+ ASSERT(bs->buf.pos != 0 || bs->buf.mem_size == 0);
+
+ bs->buf.mem_size += size;
bs->buf.stk[bs->buf.pos++] = buf;
+
+ ASSERT(0 <= bs->buf.mem_size
+ && bs->buf.mem_size <= BUFFER_STACK_MAX_MEM_SIZE);
}
}
@@ -4531,8 +4562,7 @@ static int inet_set_opts(inet_descriptor* desc, char* ptr, int len)
case INET_LOPT_BUFFER:
DEBUGF(("inet_set_opts(%ld): s=%d, BUFFER=%d\r\n",
(long)desc->port, desc->s, ival));
- if (ival > INET_MAX_BUFFER) ival = INET_MAX_BUFFER;
- else if (ival < INET_MIN_BUFFER) ival = INET_MIN_BUFFER;
+ if (ival < INET_MIN_BUFFER) ival = INET_MIN_BUFFER;
desc->bufsz = ival;
continue;
@@ -4597,7 +4627,6 @@ static int inet_set_opts(inet_descriptor* desc, char* ptr, int len)
if (desc->stype == SOCK_STREAM) {
tcp_descriptor* tdesc = (tcp_descriptor*) desc;
if (ival < 0) ival = 0;
- else if (ival > INET_MAX_BUFFER*2) ival = INET_MAX_BUFFER*2;
if (tdesc->low > ival)
tdesc->low = ival;
tdesc->high = ival;
@@ -4608,7 +4637,6 @@ static int inet_set_opts(inet_descriptor* desc, char* ptr, int len)
if (desc->stype == SOCK_STREAM) {
tcp_descriptor* tdesc = (tcp_descriptor*) desc;
if (ival < 0) ival = 0;
- else if (ival > INET_MAX_BUFFER) ival = INET_MAX_BUFFER;
if (tdesc->high < ival)
tdesc->high = ival;
tdesc->low = ival;
@@ -4954,9 +4982,6 @@ static int sctp_set_opts(inet_descriptor* desc, char* ptr, int len)
case INET_LOPT_BUFFER:
desc->bufsz = get_int32(curr); curr += 4;
- if (desc->bufsz > INET_MAX_BUFFER)
- desc->bufsz = INET_MAX_BUFFER;
- else
if (desc->bufsz < INET_MIN_BUFFER)
desc->bufsz = INET_MIN_BUFFER;
res = 0; /* This does not affect the kernel buffer size */
@@ -5391,7 +5416,7 @@ static int inet_fill_opts(inet_descriptor* desc,
#define PLACE_FOR(Size,Ptr) \
do { \
int need = dest_used + (Size); \
- if (need > INET_MAX_BUFFER) { \
+ if (need > INET_MAX_OPT_BUFFER) { \
RETURN_ERROR(); \
} \
if (need > dest_allocated) { \
@@ -5615,7 +5640,7 @@ static int inet_fill_opts(inet_descriptor* desc,
buf += 4;
data_provided = (int) *buf++;
arg_sz = get_int32(buf);
- if (arg_sz > INET_MAX_BUFFER) {
+ if (arg_sz > INET_MAX_OPT_BUFFER) {
RETURN_ERROR();
}
buf += 4;
@@ -5729,7 +5754,7 @@ static int sctp_fill_opts(inet_descriptor* desc, char* buf, int buflen,
"miscalculated buffer size"); \
} \
need = (Index) + (N); \
- if (need > INET_MAX_BUFFER/sizeof(ErlDrvTermData)) { \
+ if (need > INET_MAX_OPT_BUFFER/sizeof(ErlDrvTermData)) {\
RETURN_ERROR((Spec), -ENOMEM); \
} \
if (need > spec_allocated) { \
@@ -6580,7 +6605,7 @@ static int inet_ctl(inet_descriptor* desc, int cmd, char* buf, int len,
}
}
DEBUGF(("inet_ctl(%ld): GETSTAT\r\n", (long) desc->port));
- if (dstlen > INET_MAX_BUFFER) /* sanity check */
+ if (dstlen > INET_MAX_OPT_BUFFER) /* sanity check */
return 0;
if (dstlen > rsize) {
if ((dst = (char*) ALLOC(dstlen)) == NULL)
@@ -6596,7 +6621,7 @@ static int inet_ctl(inet_descriptor* desc, int cmd, char* buf, int len,
char* dst;
int dstlen = 1 /* Reply code */ + len*5;
DEBUGF(("inet_ctl(%ld): INET_REQ_SUBSCRIBE\r\n", (long) desc->port));
- if (dstlen > INET_MAX_BUFFER) /* sanity check */
+ if (dstlen > INET_MAX_OPT_BUFFER) /* sanity check */
return 0;
if (dstlen > rsize) {
if ((dst = (char*) ALLOC(dstlen)) == NULL)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-14 23:40:00 +0000