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authorLinus Torvalds <torvalds@linux-foundation.org>2016-11-04 20:12:10 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-11-04 20:12:10 -0700
commitfb415f222c26d0d1fa19615af1d102bf5f5b3ca2 (patch)
treec2cc2ca5e597b6da803d63252fefbc2be6aba65a /fs
parent46d7cbb2c49ac93246aad9ac76b39ef2ac7bc41b (diff)
parentf46c445b79906a9da55c13e0a6f6b6a006b892fe (diff)
Merge tag 'nfsd-4.9-1' of git://linux-nfs.org/~bfields/linux
Pull nfsd bugfixes from Bruce Fields: "Fixes for some recent regressions including fallout from the vmalloc'd stack change (after which we can no longer encrypt stuff on the stack)" * tag 'nfsd-4.9-1' of git://linux-nfs.org/~bfields/linux: nfsd: Fix general protection fault in release_lock_stateid() svcrdma: backchannel cannot share a page for send and rcv buffers sunrpc: fix some missing rq_rbuffer assignments sunrpc: don't pass on-stack memory to sg_set_buf nfsd: move blocked lock handling under a dedicated spinlock
Diffstat (limited to 'fs')
-rw-r--r--fs/nfsd/netns.h5
-rw-r--r--fs/nfsd/nfs4state.c38
2 files changed, 24 insertions, 19 deletions
diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h
index b10d557f9c9e..ee36efd5aece 100644
--- a/fs/nfsd/netns.h
+++ b/fs/nfsd/netns.h
@@ -84,6 +84,8 @@ struct nfsd_net {
struct list_head client_lru;
struct list_head close_lru;
struct list_head del_recall_lru;
+
+ /* protected by blocked_locks_lock */
struct list_head blocked_locks_lru;
struct delayed_work laundromat_work;
@@ -91,6 +93,9 @@ struct nfsd_net {
/* client_lock protects the client lru list and session hash table */
spinlock_t client_lock;
+ /* protects blocked_locks_lru */
+ spinlock_t blocked_locks_lock;
+
struct file *rec_file;
bool in_grace;
const struct nfsd4_client_tracking_ops *client_tracking_ops;
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 9752beb78659..4b4beaaa4eaa 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -217,7 +217,7 @@ find_blocked_lock(struct nfs4_lockowner *lo, struct knfsd_fh *fh,
{
struct nfsd4_blocked_lock *cur, *found = NULL;
- spin_lock(&nn->client_lock);
+ spin_lock(&nn->blocked_locks_lock);
list_for_each_entry(cur, &lo->lo_blocked, nbl_list) {
if (fh_match(fh, &cur->nbl_fh)) {
list_del_init(&cur->nbl_list);
@@ -226,7 +226,7 @@ find_blocked_lock(struct nfs4_lockowner *lo, struct knfsd_fh *fh,
break;
}
}
- spin_unlock(&nn->client_lock);
+ spin_unlock(&nn->blocked_locks_lock);
if (found)
posix_unblock_lock(&found->nbl_lock);
return found;
@@ -1227,9 +1227,7 @@ static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp,
static bool unhash_lock_stateid(struct nfs4_ol_stateid *stp)
{
- struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner);
-
- lockdep_assert_held(&oo->oo_owner.so_client->cl_lock);
+ lockdep_assert_held(&stp->st_stid.sc_client->cl_lock);
list_del_init(&stp->st_locks);
nfs4_unhash_stid(&stp->st_stid);
@@ -1238,12 +1236,12 @@ static bool unhash_lock_stateid(struct nfs4_ol_stateid *stp)
static void release_lock_stateid(struct nfs4_ol_stateid *stp)
{
- struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner);
+ struct nfs4_client *clp = stp->st_stid.sc_client;
bool unhashed;
- spin_lock(&oo->oo_owner.so_client->cl_lock);
+ spin_lock(&clp->cl_lock);
unhashed = unhash_lock_stateid(stp);
- spin_unlock(&oo->oo_owner.so_client->cl_lock);
+ spin_unlock(&clp->cl_lock);
if (unhashed)
nfs4_put_stid(&stp->st_stid);
}
@@ -4665,7 +4663,7 @@ nfs4_laundromat(struct nfsd_net *nn)
* indefinitely once the lock does become free.
*/
BUG_ON(!list_empty(&reaplist));
- spin_lock(&nn->client_lock);
+ spin_lock(&nn->blocked_locks_lock);
while (!list_empty(&nn->blocked_locks_lru)) {
nbl = list_first_entry(&nn->blocked_locks_lru,
struct nfsd4_blocked_lock, nbl_lru);
@@ -4678,7 +4676,7 @@ nfs4_laundromat(struct nfsd_net *nn)
list_move(&nbl->nbl_lru, &reaplist);
list_del_init(&nbl->nbl_list);
}
- spin_unlock(&nn->client_lock);
+ spin_unlock(&nn->blocked_locks_lock);
while (!list_empty(&reaplist)) {
nbl = list_first_entry(&nn->blocked_locks_lru,
@@ -5439,13 +5437,13 @@ nfsd4_lm_notify(struct file_lock *fl)
bool queue = false;
/* An empty list means that something else is going to be using it */
- spin_lock(&nn->client_lock);
+ spin_lock(&nn->blocked_locks_lock);
if (!list_empty(&nbl->nbl_list)) {
list_del_init(&nbl->nbl_list);
list_del_init(&nbl->nbl_lru);
queue = true;
}
- spin_unlock(&nn->client_lock);
+ spin_unlock(&nn->blocked_locks_lock);
if (queue)
nfsd4_run_cb(&nbl->nbl_cb);
@@ -5868,10 +5866,10 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
if (fl_flags & FL_SLEEP) {
nbl->nbl_time = jiffies;
- spin_lock(&nn->client_lock);
+ spin_lock(&nn->blocked_locks_lock);
list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked);
list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru);
- spin_unlock(&nn->client_lock);
+ spin_unlock(&nn->blocked_locks_lock);
}
err = vfs_lock_file(filp, F_SETLK, file_lock, conflock);
@@ -5900,10 +5898,10 @@ out:
if (nbl) {
/* dequeue it if we queued it before */
if (fl_flags & FL_SLEEP) {
- spin_lock(&nn->client_lock);
+ spin_lock(&nn->blocked_locks_lock);
list_del_init(&nbl->nbl_list);
list_del_init(&nbl->nbl_lru);
- spin_unlock(&nn->client_lock);
+ spin_unlock(&nn->blocked_locks_lock);
}
free_blocked_lock(nbl);
}
@@ -6943,9 +6941,11 @@ static int nfs4_state_create_net(struct net *net)
INIT_LIST_HEAD(&nn->client_lru);
INIT_LIST_HEAD(&nn->close_lru);
INIT_LIST_HEAD(&nn->del_recall_lru);
- INIT_LIST_HEAD(&nn->blocked_locks_lru);
spin_lock_init(&nn->client_lock);
+ spin_lock_init(&nn->blocked_locks_lock);
+ INIT_LIST_HEAD(&nn->blocked_locks_lru);
+
INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main);
get_net(net);
@@ -7063,14 +7063,14 @@ nfs4_state_shutdown_net(struct net *net)
}
BUG_ON(!list_empty(&reaplist));
- spin_lock(&nn->client_lock);
+ spin_lock(&nn->blocked_locks_lock);
while (!list_empty(&nn->blocked_locks_lru)) {
nbl = list_first_entry(&nn->blocked_locks_lru,
struct nfsd4_blocked_lock, nbl_lru);
list_move(&nbl->nbl_lru, &reaplist);
list_del_init(&nbl->nbl_list);
}
- spin_unlock(&nn->client_lock);
+ spin_unlock(&nn->blocked_locks_lock);
while (!list_empty(&reaplist)) {
nbl = list_first_entry(&nn->blocked_locks_lru,