diff options
Diffstat (limited to 'fs/lockd/host.c')
-rw-r--r-- | fs/lockd/host.c | 131 |
1 files changed, 77 insertions, 54 deletions
diff --git a/fs/lockd/host.c b/fs/lockd/host.c index eb75ca7c2d6e..969d589c848d 100644 --- a/fs/lockd/host.c +++ b/fs/lockd/host.c @@ -13,6 +13,7 @@ #include <linux/in.h> #include <linux/in6.h> #include <linux/sunrpc/clnt.h> +#include <linux/sunrpc/addr.h> #include <linux/sunrpc/svc.h> #include <linux/lockd/lockd.h> #include <linux/mutex.h> @@ -21,6 +22,8 @@ #include <net/ipv6.h> +#include "netns.h" + #define NLMDBG_FACILITY NLMDBG_HOSTCACHE #define NLM_HOST_NRHASH 32 #define NLM_HOST_REBIND (60 * HZ) @@ -30,22 +33,21 @@ static struct hlist_head nlm_server_hosts[NLM_HOST_NRHASH]; static struct hlist_head nlm_client_hosts[NLM_HOST_NRHASH]; -#define for_each_host(host, pos, chain, table) \ +#define for_each_host(host, chain, table) \ for ((chain) = (table); \ (chain) < (table) + NLM_HOST_NRHASH; ++(chain)) \ - hlist_for_each_entry((host), (pos), (chain), h_hash) + hlist_for_each_entry((host), (chain), h_hash) -#define for_each_host_safe(host, pos, next, chain, table) \ +#define for_each_host_safe(host, next, chain, table) \ for ((chain) = (table); \ (chain) < (table) + NLM_HOST_NRHASH; ++(chain)) \ - hlist_for_each_entry_safe((host), (pos), (next), \ + hlist_for_each_entry_safe((host), (next), \ (chain), h_hash) -static unsigned long next_gc; static unsigned long nrhosts; static DEFINE_MUTEX(nlm_host_mutex); -static void nlm_gc_hosts(void); +static void nlm_gc_hosts(struct net *net); struct nlm_lookup_host_info { const int server; /* search for server|client */ @@ -172,12 +174,10 @@ out: static void nlm_destroy_host_locked(struct nlm_host *host) { struct rpc_clnt *clnt; + struct lockd_net *ln = net_generic(host->net, lockd_net_id); dprintk("lockd: destroy host %s\n", host->h_name); - BUG_ON(!list_empty(&host->h_lockowners)); - BUG_ON(atomic_read(&host->h_count)); - hlist_del_init(&host->h_hash); nsm_unmonitor(host); @@ -188,6 +188,7 @@ static void nlm_destroy_host_locked(struct nlm_host *host) rpc_shutdown_client(clnt); kfree(host); + ln->nrhosts--; nrhosts--; } @@ -225,9 +226,9 @@ struct nlm_host *nlmclnt_lookup_host(const struct sockaddr *sap, .net = net, }; struct hlist_head *chain; - struct hlist_node *pos; struct nlm_host *host; struct nsm_handle *nsm = NULL; + struct lockd_net *ln = net_generic(net, lockd_net_id); dprintk("lockd: %s(host='%s', vers=%u, proto=%s)\n", __func__, (hostname ? hostname : "<none>"), version, @@ -236,7 +237,7 @@ struct nlm_host *nlmclnt_lookup_host(const struct sockaddr *sap, mutex_lock(&nlm_host_mutex); chain = &nlm_client_hosts[nlm_hash_address(sap)]; - hlist_for_each_entry(host, pos, chain, h_hash) { + hlist_for_each_entry(host, chain, h_hash) { if (host->net != net) continue; if (!rpc_cmp_addr(nlm_addr(host), sap)) @@ -262,6 +263,7 @@ struct nlm_host *nlmclnt_lookup_host(const struct sockaddr *sap, goto out; hlist_add_head(&host->h_hash, chain); + ln->nrhosts++; nrhosts++; dprintk("lockd: %s created host %s (%s)\n", __func__, @@ -284,13 +286,12 @@ void nlmclnt_release_host(struct nlm_host *host) dprintk("lockd: release client host %s\n", host->h_name); - BUG_ON(atomic_read(&host->h_count) < 0); - BUG_ON(host->h_server); + WARN_ON_ONCE(host->h_server); if (atomic_dec_and_test(&host->h_count)) { - BUG_ON(!list_empty(&host->h_lockowners)); - BUG_ON(!list_empty(&host->h_granted)); - BUG_ON(!list_empty(&host->h_reclaim)); + WARN_ON_ONCE(!list_empty(&host->h_lockowners)); + WARN_ON_ONCE(!list_empty(&host->h_granted)); + WARN_ON_ONCE(!list_empty(&host->h_reclaim)); mutex_lock(&nlm_host_mutex); nlm_destroy_host_locked(host); @@ -321,12 +322,11 @@ struct nlm_host *nlmsvc_lookup_host(const struct svc_rqst *rqstp, const size_t hostname_len) { struct hlist_head *chain; - struct hlist_node *pos; struct nlm_host *host = NULL; struct nsm_handle *nsm = NULL; struct sockaddr *src_sap = svc_daddr(rqstp); size_t src_len = rqstp->rq_daddrlen; - struct net *net = rqstp->rq_xprt->xpt_net; + struct net *net = SVC_NET(rqstp); struct nlm_lookup_host_info ni = { .server = 1, .sap = svc_addr(rqstp), @@ -337,6 +337,7 @@ struct nlm_host *nlmsvc_lookup_host(const struct svc_rqst *rqstp, .hostname_len = hostname_len, .net = net, }; + struct lockd_net *ln = net_generic(net, lockd_net_id); dprintk("lockd: %s(host='%*s', vers=%u, proto=%s)\n", __func__, (int)hostname_len, hostname, rqstp->rq_vers, @@ -344,11 +345,11 @@ struct nlm_host *nlmsvc_lookup_host(const struct svc_rqst *rqstp, mutex_lock(&nlm_host_mutex); - if (time_after_eq(jiffies, next_gc)) - nlm_gc_hosts(); + if (time_after_eq(jiffies, ln->next_gc)) + nlm_gc_hosts(net); chain = &nlm_server_hosts[nlm_hash_address(ni.sap)]; - hlist_for_each_entry(host, pos, chain, h_hash) { + hlist_for_each_entry(host, chain, h_hash) { if (host->net != net) continue; if (!rpc_cmp_addr(nlm_addr(host), ni.sap)) @@ -382,6 +383,7 @@ struct nlm_host *nlmsvc_lookup_host(const struct svc_rqst *rqstp, memcpy(nlm_srcaddr(host), src_sap, src_len); host->h_srcaddrlen = src_len; hlist_add_head(&host->h_hash, chain); + ln->nrhosts++; nrhosts++; dprintk("lockd: %s created host %s (%s)\n", @@ -405,8 +407,7 @@ void nlmsvc_release_host(struct nlm_host *host) dprintk("lockd: release server host %s\n", host->h_name); - BUG_ON(atomic_read(&host->h_count) < 0); - BUG_ON(!host->h_server); + WARN_ON_ONCE(!host->h_server); atomic_dec(&host->h_count); } @@ -513,10 +514,9 @@ static struct nlm_host *next_host_state(struct hlist_head *cache, { struct nlm_host *host; struct hlist_head *chain; - struct hlist_node *pos; mutex_lock(&nlm_host_mutex); - for_each_host(host, pos, chain, cache) { + for_each_host(host, chain, cache) { if (host->h_nsmhandle == nsm && host->h_nsmstate != info->state) { host->h_nsmstate = info->state; @@ -565,19 +565,45 @@ void nlm_host_rebooted(const struct nlm_reboot *info) nsm_release(nsm); } +static void nlm_complain_hosts(struct net *net) +{ + struct hlist_head *chain; + struct nlm_host *host; + + if (net) { + struct lockd_net *ln = net_generic(net, lockd_net_id); + + if (ln->nrhosts == 0) + return; + printk(KERN_WARNING "lockd: couldn't shutdown host module for net %p!\n", net); + dprintk("lockd: %lu hosts left in net %p:\n", ln->nrhosts, net); + } else { + if (nrhosts == 0) + return; + printk(KERN_WARNING "lockd: couldn't shutdown host module!\n"); + dprintk("lockd: %lu hosts left:\n", nrhosts); + } + + for_each_host(host, chain, nlm_server_hosts) { + if (net && host->net != net) + continue; + dprintk(" %s (cnt %d use %d exp %ld net %p)\n", + host->h_name, atomic_read(&host->h_count), + host->h_inuse, host->h_expires, host->net); + } +} + void nlm_shutdown_hosts_net(struct net *net) { struct hlist_head *chain; - struct hlist_node *pos; struct nlm_host *host; - dprintk("lockd: shutting down host module\n"); mutex_lock(&nlm_host_mutex); /* First, make all hosts eligible for gc */ - dprintk("lockd: nuking all hosts...\n"); - for_each_host(host, pos, chain, nlm_server_hosts) { + dprintk("lockd: nuking all hosts in net %p...\n", net); + for_each_host(host, chain, nlm_server_hosts) { if (net && host->net != net) continue; host->h_expires = jiffies - 1; @@ -588,8 +614,10 @@ nlm_shutdown_hosts_net(struct net *net) } /* Then, perform a garbage collection pass */ - nlm_gc_hosts(); + nlm_gc_hosts(net); mutex_unlock(&nlm_host_mutex); + + nlm_complain_hosts(net); } /* @@ -599,22 +627,8 @@ nlm_shutdown_hosts_net(struct net *net) void nlm_shutdown_hosts(void) { - struct hlist_head *chain; - struct hlist_node *pos; - struct nlm_host *host; - + dprintk("lockd: shutting down host module\n"); nlm_shutdown_hosts_net(NULL); - - /* complain if any hosts are left */ - if (nrhosts != 0) { - printk(KERN_WARNING "lockd: couldn't shutdown host module!\n"); - dprintk("lockd: %lu hosts left:\n", nrhosts); - for_each_host(host, pos, chain, nlm_server_hosts) { - dprintk(" %s (cnt %d use %d exp %ld net %p)\n", - host->h_name, atomic_read(&host->h_count), - host->h_inuse, host->h_expires, host->net); - } - } } /* @@ -623,30 +637,39 @@ nlm_shutdown_hosts(void) * mark & sweep for resources held by remote clients. */ static void -nlm_gc_hosts(void) +nlm_gc_hosts(struct net *net) { struct hlist_head *chain; - struct hlist_node *pos, *next; + struct hlist_node *next; struct nlm_host *host; - dprintk("lockd: host garbage collection\n"); - for_each_host(host, pos, chain, nlm_server_hosts) + dprintk("lockd: host garbage collection for net %p\n", net); + for_each_host(host, chain, nlm_server_hosts) { + if (net && host->net != net) + continue; host->h_inuse = 0; + } /* Mark all hosts that hold locks, blocks or shares */ - nlmsvc_mark_resources(); + nlmsvc_mark_resources(net); - for_each_host_safe(host, pos, next, chain, nlm_server_hosts) { + for_each_host_safe(host, next, chain, nlm_server_hosts) { + if (net && host->net != net) + continue; if (atomic_read(&host->h_count) || host->h_inuse || time_before(jiffies, host->h_expires)) { dprintk("nlm_gc_hosts skipping %s " - "(cnt %d use %d exp %ld)\n", + "(cnt %d use %d exp %ld net %p)\n", host->h_name, atomic_read(&host->h_count), - host->h_inuse, host->h_expires); + host->h_inuse, host->h_expires, host->net); continue; } nlm_destroy_host_locked(host); } - next_gc = jiffies + NLM_HOST_COLLECT; + if (net) { + struct lockd_net *ln = net_generic(net, lockd_net_id); + + ln->next_gc = jiffies + NLM_HOST_COLLECT; + } } |