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rconn: Maintain original allowed_versions instead of substituting for zero.

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rconn_create() was substituting OFPUTIL_DEFAULT_VERSIONS if an
allowed_versions of 0 was passed in.  At the same time,
connmgr_set_controllers() compared the adjusted value of allowed_versions
against the original value, saw that they were different, and concluded
that it should kill off and recreate the rconn with the "corrected"
allowed_versions.

This commit fixes the problem by no longer adjusting allowed_versions.
There is no need, because it is only used in contexts where the original
version is OK.

This problem was introduced by commit 90ef0206ea (connmgr:
Reinitialise controllers if protocols changes).

Bug #14126.
CC: Simon Horman <horms@verge.net.au>
Reported-by: Natasha Gude <natasha@nicira.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
This commit is contained in:
Ben Pfaff
2012-12-04 18:23:00 -08:00
parent 314e60e195
commit 5b8ab80c08
1 changed files with 5 additions and 7 deletions
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12
lib/rconn.c
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@@ -174,10 +174,10 @@ static bool rconn_logging_connection_attempts__(const struct rconn *);
*
* Connections made by the rconn will automatically negotiate an OpenFlow
* protocol version acceptable to both peers on the connection. The version
* negotiated will be one of those in the 'allowed_versions' bitmap:
* version 'x' is allowed if allowed_versions & (1 << x) is nonzero. If
* 'allowed_versions' is zero, then OFPUTIL_DEFAULT_VERSIONS are allowed.
**/
* negotiated will be one of those in the 'allowed_versions' bitmap: version
* 'x' is allowed if allowed_versions & (1 << x) is nonzero. (The underlying
* vconn will treat an 'allowed_versions' of 0 as OFPUTIL_DEFAULT_VERSIONS.)
*/
struct rconn *
rconn_create(int probe_interval, int max_backoff, uint8_t dscp,
uint32_t allowed_versions)
@@ -218,9 +218,7 @@ rconn_create(int probe_interval, int max_backoff, uint8_t dscp,
rconn_set_dscp(rc, dscp);
rc->n_monitors = 0;
rc->allowed_versions = allowed_versions
? allowed_versions
: OFPUTIL_DEFAULT_VERSIONS;
rc->allowed_versions = allowed_versions;
return rc;
}