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Commit 6c073a7e authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client 

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  rbd: fix safety of rbd_put_client()
  rbd: fix a memory leak in rbd_get_client()
  ceph: create a new session lock to avoid lock inversion
  ceph: fix length validation in parse_reply_info()
  ceph: initialize client debugfs outside of monc->mutex
  ceph: change "ceph.layout" xattr to be "ceph.file.layout"
parents ff05f603 d23a4b3f

drivers/block/rbd.c

+5 −2
Original line number Diff line number Diff line
@@ -380,6 +380,7 @@ static int rbd_get_client(struct rbd_device *rbd_dev, const char *mon_addr, 
	rbdc = __rbd_client_find(opt);

	if (rbdc) {

		ceph_destroy_options(opt);

		kfree(rbd_opts);



		/* using an existing client */

		kref_get(&rbdc->kref);
@@ -406,15 +407,15 @@ done_err: 


/*

 * Destroy ceph client

 *

 * Caller must hold node_lock.

 */

static void rbd_client_release(struct kref *kref)

{

	struct rbd_client *rbdc = container_of(kref, struct rbd_client, kref);



	dout("rbd_release_client %p\n", rbdc);

	spin_lock(&node_lock);

	list_del(&rbdc->node);

	spin_unlock(&node_lock);



	ceph_destroy_client(rbdc->client);

	kfree(rbdc->rbd_opts);
@@ -427,7 +428,9 @@ static void rbd_client_release(struct kref *kref) 
 */

static void rbd_put_client(struct rbd_device *rbd_dev)

{

	spin_lock(&node_lock);

	kref_put(&rbd_dev->rbd_client->kref, rbd_client_release);

	spin_unlock(&node_lock);

	rbd_dev->rbd_client = NULL;

	rbd_dev->client = NULL;

}

fs/ceph/caps.c

+2 −2
Original line number Diff line number Diff line
@@ -641,10 +641,10 @@ static int __cap_is_valid(struct ceph_cap *cap) 
	unsigned long ttl;

	u32 gen;



	spin_lock(&cap->session->s_cap_lock);

	spin_lock(&cap->session->s_gen_ttl_lock);

	gen = cap->session->s_cap_gen;

	ttl = cap->session->s_cap_ttl;

	spin_unlock(&cap->session->s_cap_lock);

	spin_unlock(&cap->session->s_gen_ttl_lock);



	if (cap->cap_gen < gen || time_after_eq(jiffies, ttl)) {

		dout("__cap_is_valid %p cap %p issued %s "

fs/ceph/dir.c

+2 −2
Original line number Diff line number Diff line
@@ -975,10 +975,10 @@ static int dentry_lease_is_valid(struct dentry *dentry) 
	di = ceph_dentry(dentry);

	if (di->lease_session) {

		s = di->lease_session;

		spin_lock(&s->s_cap_lock);

		spin_lock(&s->s_gen_ttl_lock);

		gen = s->s_cap_gen;

		ttl = s->s_cap_ttl;

		spin_unlock(&s->s_cap_lock);

		spin_unlock(&s->s_gen_ttl_lock);



		if (di->lease_gen == gen &&

		    time_before(jiffies, dentry->d_time) &&

fs/ceph/mds_client.c

+7 −3
Original line number Diff line number Diff line
@@ -262,6 +262,7 @@ static int parse_reply_info(struct ceph_msg *msg, 
	/* trace */

	ceph_decode_32_safe(&p, end, len, bad);

	if (len > 0) {

		ceph_decode_need(&p, end, len, bad);

		err = parse_reply_info_trace(&p, p+len, info, features);

		if (err < 0)

			goto out_bad;
@@ -270,6 +271,7 @@ static int parse_reply_info(struct ceph_msg *msg, 
	/* extra */

	ceph_decode_32_safe(&p, end, len, bad);

	if (len > 0) {

		ceph_decode_need(&p, end, len, bad);

		err = parse_reply_info_extra(&p, p+len, info, features);

		if (err < 0)

			goto out_bad;
@@ -398,9 +400,11 @@ static struct ceph_mds_session *register_session(struct ceph_mds_client *mdsc, 
	s->s_con.peer_name.type = CEPH_ENTITY_TYPE_MDS;

	s->s_con.peer_name.num = cpu_to_le64(mds);



	spin_lock_init(&s->s_cap_lock);

	spin_lock_init(&s->s_gen_ttl_lock);

	s->s_cap_gen = 0;

	s->s_cap_ttl = 0;



	spin_lock_init(&s->s_cap_lock);

	s->s_renew_requested = 0;

	s->s_renew_seq = 0;

	INIT_LIST_HEAD(&s->s_caps);
@@ -2326,10 +2330,10 @@ static void handle_session(struct ceph_mds_session *session, 
	case CEPH_SESSION_STALE:

		pr_info("mds%d caps went stale, renewing\n",

			session->s_mds);

		spin_lock(&session->s_cap_lock);

		spin_lock(&session->s_gen_ttl_lock);

		session->s_cap_gen++;

		session->s_cap_ttl = 0;

		spin_unlock(&session->s_cap_lock);

		spin_unlock(&session->s_gen_ttl_lock);

		send_renew_caps(mdsc, session);

		break;

fs/ceph/mds_client.h

+5 −2
Original line number Diff line number Diff line
@@ -117,10 +117,13 @@ struct ceph_mds_session { 
	void             *s_authorizer_buf, *s_authorizer_reply_buf;

	size_t            s_authorizer_buf_len, s_authorizer_reply_buf_len;



	/* protected by s_cap_lock */

	spinlock_t        s_cap_lock;

	/* protected by s_gen_ttl_lock */

	spinlock_t        s_gen_ttl_lock;

	u32               s_cap_gen;  /* inc each time we get mds stale msg */

	unsigned long     s_cap_ttl;  /* when session caps expire */



	/* protected by s_cap_lock */

	spinlock_t        s_cap_lock;

	struct list_head  s_caps;     /* all caps issued by this session */

	int               s_nr_caps, s_trim_caps;

	int               s_num_cap_releases;