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-rw-r--r--source3/smbd/smb2_server.c27
1 files changed, 24 insertions, 3 deletions
diff --git a/source3/smbd/smb2_server.c b/source3/smbd/smb2_server.c
index 11b5ed8bf0..288cc79b54 100644
--- a/source3/smbd/smb2_server.c
+++ b/source3/smbd/smb2_server.c
@@ -455,9 +455,30 @@ static void smb2_set_operation_credit(struct smbd_server_connection *sconn,
SMB_ASSERT(sconn->smb2.max_credits >= sconn->smb2.credits_granted);
- /* Remember what we gave out. */
- credits_granted = MIN(credits_requested, (sconn->smb2.max_credits -
- sconn->smb2.credits_granted));
+ if (credits_requested) {
+ uint16_t modified_credits_requested;
+ uint32_t multiplier;
+
+ /*
+ * Split up max_credits into 1/16ths, and then scale
+ * the requested credits by how many 16ths have been
+ * currently granted. Less than 1/16th == grant all
+ * requested (100%), scale down as more have been
+ * granted. Never ask for less than 1 as the client
+ * asked for at least 1. JRA.
+ */
+
+ multiplier = 16 - (((sconn->smb2.credits_granted * 16) / sconn->smb2.max_credits) % 16);
+
+ modified_credits_requested = (multiplier * credits_requested) / 16;
+ if (modified_credits_requested == 0) {
+ modified_credits_requested = 1;
+ }
+
+ /* Remember what we gave out. */
+ credits_granted = MIN(modified_credits_requested,
+ (sconn->smb2.max_credits - sconn->smb2.credits_granted));
+ }
if (credits_granted == 0 && sconn->smb2.credits_granted == 0) {
/* First negprot packet, or ensure the client credits can