admin/libiscsi
1
0
Fork 0
Code Issues Pull Requests Actions 2 Packages Projects Releases Wiki Activity

PDU use serial32 arithmetic for cmdsn, maxcmdsn and expcmdsn.

Browse Source 
RFC3720 says that cmdsn comparison must be done using
serial32 arithmetic. This will definetly avoid a deadlock
if cmdsn wraps from 2^32-1 to 0.

Signed-off-by: Peter Lieven <pl@kamp.de>
This commit is contained in:
Peter Lieven
2012-11-28 10:37:28 +01:00
parent 700d363a88
commit cd09c0f17d
6 changed files with 30 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
lib/socket.c
View File

@@ -302,7 +302,7 @@ iscsi_which_events(struct iscsi_context *iscsi)
{
int events = iscsi->is_connected ? POLLIN : POLLOUT;
if (iscsi->outqueue && iscsi->outqueue->cmdsn <= iscsi->maxcmdsn) {
if (iscsi->outqueue && iscsi_serial32_compare(iscsi->outqueue->cmdsn,iscsi->maxcmdsn) <= 0) {
events |= POLLOUT;
}
return events;
@@ -442,7 +442,7 @@ iscsi_write_to_socket(struct iscsi_context *iscsi)
while (iscsi->outqueue) {
ssize_t total;
if (iscsi->outqueue->cmdsn > iscsi->maxcmdsn) {
if (iscsi_serial32_compare(iscsi->outqueue->cmdsn,iscsi->maxcmdsn) > 0) {
/* stop sending. maxcmdsn is reached */
return 0;
}