master - lvmlockd: use new sanlock flag to avoid blocking

[David Teigland]

Gitweb:        http://git.fedorahosted.org/git/?p=lvm2.git;a=commitdiff;h=664fa6d1be10a807f...
Commit:        664fa6d1be10a807f8edc13801b1cd62248ae76f
Parent:        77f034bfa3d85600ec9b9581c17352202ce09ae8
Author:        David Teigland 
AuthorDate:    Wed Feb 24 10:10:59 2016 -0600
Committer:     David Teigland 
CommitterDate: Wed Feb 24 10:10:59 2016 -0600

lvmlockd: use new sanlock flag to avoid blocking

This flag allows sanlock requests to avoid all blocking.
---
 daemons/lvmlockd/lvmlockd-sanlock.c |    5 +----
 1 files changed, 1 insertions(+), 4 deletions(-)

diff --git a/daemons/lvmlockd/lvmlockd-sanlock.c b/daemons/lvmlockd/lvmlockd-sanlock.c
index 6694652..c6534d8 100644
--- a/daemons/lvmlockd/lvmlockd-sanlock.c
+++ b/daemons/lvmlockd/lvmlockd-sanlock.c
@@ -1416,14 +1416,12 @@ int lm_lock_sanlock(struct lockspace *ls, struct resource *r, int ld_mode,
    if (adopt)
    	flags |= SANLK_ACQUIRE_ORPHAN_ONLY;

-#ifdef SANLOCK_HAS_ACQUIRE_OWNER_NOWAIT
    /*
     * Don't block waiting for a failed lease to expire since it causes
     * sanlock_acquire to block for a long time, which would prevent this
     * thread from processing other lock requests.
     */
    flags |= SANLK_ACQUIRE_OWNER_NOWAIT;
-#endif

memset(&opt, 0, sizeof(opt));
    sprintf(opt.owner_name, "%s", "lvmlockd");
@@ -1498,7 +1496,6 @@ int lm_lock_sanlock(struct lockspace *ls, struct resource *r, int ld_mode,
    	return -EAGAIN;
    }

-#ifdef SANLOCK_HAS_ACQUIRE_OWNER_NOWAIT
    if (rv == SANLK_ACQUIRE_OWNED_RETRY) {
    	/*
    	 * The lock is held by a failed host, and will eventually
@@ -1517,7 +1514,7 @@ int lm_lock_sanlock(struct lockspace *ls, struct resource *r, int ld_mode,
    	*retry = 0;
    	return -EAGAIN;
    }
-#endif
+
    if (rv < 0) {
    	log_error("S %s R %s lock_san acquire error %d",
    		  ls->name, r->name, rv);