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| author | Trond Myklebust <trondmy@gmail.com> | 2018-01-23 19:39:04 -0500 |
|---|---|---|
| committer | Trond Myklebust <trondmy@gmail.com> | 2018-01-24 17:33:57 -0500 |
| commit | 535cb8f3193f2976f39371810dcad64ae2650771 (patch) | |
| tree | dd7ece1d3b2cf6b5475e4e9120d43bced6d46224 | |
| parent | 8f39fce84a6765b62cbc30fd9c3fdaa5bdf46ded (diff) | |
| download | linux-535cb8f3193f2976f39371810dcad64ae2650771.tar.bz2 | |
lockd: Fix server refcounting
The server shouldn't actually delete the struct nlm_host until it hits
the garbage collector. In order to make that work correctly with the
refcount API, we can bump the refcount by one, and then use
refcount_dec_if_one() in the garbage collector.
Signed-off-by: Trond Myklebust <trondmy@gmail.com>
Acked-by: J. Bruce Fields <bfields@fieldses.org>
| -rw-r--r-- | fs/lockd/host.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/fs/lockd/host.c b/fs/lockd/host.c index 7d6ab72bbe65..d35cd6be0675 100644 --- a/fs/lockd/host.c +++ b/fs/lockd/host.c @@ -388,6 +388,8 @@ struct nlm_host *nlmsvc_lookup_host(const struct svc_rqst *rqstp, ln->nrhosts++; nrhosts++; + refcount_inc(&host->h_count); + dprintk("lockd: %s created host %s (%s)\n", __func__, host->h_name, host->h_addrbuf); @@ -662,8 +664,7 @@ nlm_gc_hosts(struct net *net) for_each_host_safe(host, next, chain, nlm_server_hosts) { if (net && host->net != net) continue; - if (refcount_read(&host->h_count) || host->h_inuse - || time_before(jiffies, host->h_expires)) { + if (host->h_inuse || time_before(jiffies, host->h_expires)) { dprintk("nlm_gc_hosts skipping %s " "(cnt %d use %d exp %ld net %x)\n", host->h_name, refcount_read(&host->h_count), @@ -671,7 +672,8 @@ nlm_gc_hosts(struct net *net) host->net->ns.inum); continue; } - nlm_destroy_host_locked(host); + if (refcount_dec_if_one(&host->h_count)) + nlm_destroy_host_locked(host); } if (net) { |