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

Pull Ceph update from Sage Weil:
 "There are a few fixes for snapshot behavior with CephFS and support
  for the new keepalive protocol from Zheng, a libceph fix that affects
  both RBD and CephFS, a few bug fixes and cleanups for RBD from Ilya,
  and several small fixes and cleanups from Jianpeng and others"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  ceph: improve readahead for file holes
  ceph: get inode size for each append write
  libceph: check data_len in ->alloc_msg()
  libceph: use keepalive2 to verify the mon session is alive
  rbd: plug rbd_dev->header.object_prefix memory leak
  rbd: fix double free on rbd_dev->header_name
  libceph: set 'exists' flag for newly up osd
  ceph: cleanup use of ceph_msg_get
  ceph: no need to get parent inode in ceph_open
  ceph: remove the useless judgement
  ceph: remove redundant test of head->safe and silence static analysis warnings
  ceph: fix queuing inode to mdsdir's snaprealm
  libceph: rename con_work() to ceph_con_workfn()
  libceph: Avoid holding the zero page on ceph_msgr_slab_init errors
  libceph: remove the unused macro AES_KEY_SIZE
  ceph: invalidate dirty pages after forced umount
  ceph: EIO all operations after forced umount

3 files changed, 9 insertions, 1 deletions

diff --git a/include/linux/ceph/libceph.h b/include/linux/ceph/libceph.h
index 9ebee53d3bf5..397c5cd09794 100644
--- a/include/linux/ceph/libceph.h
+++ b/include/linux/ceph/libceph.h
@@ -46,6 +46,7 @@ struct ceph_options {
 	unsigned long mount_timeout;		/* jiffies */
 	unsigned long osd_idle_ttl;		/* jiffies */
 	unsigned long osd_keepalive_timeout;	/* jiffies */
+	unsigned long monc_ping_timeout;	/* jiffies */
 
 	/*
 	 * any type that can't be simply compared or doesn't need need
@@ -66,6 +67,7 @@ struct ceph_options {
 #define CEPH_MOUNT_TIMEOUT_DEFAULT	msecs_to_jiffies(60 * 1000)
 #define CEPH_OSD_KEEPALIVE_DEFAULT	msecs_to_jiffies(5 * 1000)
 #define CEPH_OSD_IDLE_TTL_DEFAULT	msecs_to_jiffies(60 * 1000)
+#define CEPH_MONC_PING_TIMEOUT_DEFAULT	msecs_to_jiffies(30 * 1000)
 
 #define CEPH_MSG_MAX_FRONT_LEN	(16*1024*1024)
 #define CEPH_MSG_MAX_MIDDLE_LEN	(16*1024*1024)
diff --git a/include/linux/ceph/messenger.h b/include/linux/ceph/messenger.h
index 37753278987a..7e1252e97a30 100644
--- a/include/linux/ceph/messenger.h
+++ b/include/linux/ceph/messenger.h
@@ -248,6 +248,8 @@ struct ceph_connection {
 	int in_base_pos;     /* bytes read */
 	__le64 in_temp_ack;  /* for reading an ack */
 
+	struct timespec last_keepalive_ack;
+
 	struct delayed_work work;	    /* send|recv work */
 	unsigned long       delay;          /* current delay interval */
 };
@@ -285,6 +287,8 @@ extern void ceph_msg_revoke(struct ceph_msg *msg);
 extern void ceph_msg_revoke_incoming(struct ceph_msg *msg);
 
 extern void ceph_con_keepalive(struct ceph_connection *con);
+extern bool ceph_con_keepalive_expired(struct ceph_connection *con,
+				       unsigned long interval);
 
 extern void ceph_msg_data_add_pages(struct ceph_msg *msg, struct page **pages,
 				size_t length, size_t alignment);
diff --git a/include/linux/ceph/msgr.h b/include/linux/ceph/msgr.h
index 1c1887206ffa..0fe2656ac415 100644
--- a/include/linux/ceph/msgr.h
+++ b/include/linux/ceph/msgr.h
@@ -84,10 +84,12 @@ struct ceph_entity_inst {
 #define CEPH_MSGR_TAG_MSG           7  /* message */
 #define CEPH_MSGR_TAG_ACK           8  /* message ack */
 #define CEPH_MSGR_TAG_KEEPALIVE     9  /* just a keepalive byte! */
-#define CEPH_MSGR_TAG_BADPROTOVER  10  /* bad protocol version */
+#define CEPH_MSGR_TAG_BADPROTOVER   10 /* bad protocol version */
 #define CEPH_MSGR_TAG_BADAUTHORIZER 11 /* bad authorizer */
 #define CEPH_MSGR_TAG_FEATURES      12 /* insufficient features */
 #define CEPH_MSGR_TAG_SEQ           13 /* 64-bit int follows with seen seq number */
+#define CEPH_MSGR_TAG_KEEPALIVE2    14 /* keepalive2 byte + ceph_timespec */
+#define CEPH_MSGR_TAG_KEEPALIVE2_ACK 15 /* keepalive2 reply */
 
 
 /*