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sunrpc: Add a function to close temporary transports immediately

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Add a function svc_age_temp_xprts_now() to close temporary transports
whose xpt_local matches the address passed in server_addr immediately
instead of waiting for them to be closed by the timer function.

The function is intended to be used by notifier_blocks that will be
added to nfsd and lockd that will run when an ip address is deleted.

This will eliminate the ACK storms and client hangs that occur in
HA-NFS configurations where nfsd & lockd is left running on the cluster
nodes all the time and the NFS 'service' is migrated back and forth
within a short timeframe.

Signed-off-by: Scott Mayhew <smayhew@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Scott Mayhew
2015-12-11 16:45:58 -05:00
committed by J. Bruce Fields
parent d4f72cb7fa
commit c3d4879e01
2 changed files with 46 additions and 0 deletions
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include/linux/sunrpc/svc_xprt.h
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@@ -128,6 +128,7 @@ struct svc_xprt *svc_find_xprt(struct svc_serv *serv, const char *xcl_name,
const unsigned short port);
int svc_xprt_names(struct svc_serv *serv, char *buf, const int buflen);
void svc_add_new_perm_xprt(struct svc_serv *serv, struct svc_xprt *xprt);
void svc_age_temp_xprts_now(struct svc_serv *, struct sockaddr *);
static inline void svc_xprt_get(struct svc_xprt *xprt)
{