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libceph: add function that reset client's entity addr 

This function also re-open connections to OSD/MON, and re-send in-flight
OSD requests after re-opening connections to OSD.

Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Yan, Zheng 2019-07-25 20:16:39 +08:00 committed by Ilya Dryomov
parent e09580b343
commit 120a75ea9f
8 changed files with 43 additions and 0 deletions
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1
include/linux/ceph/libceph.h
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@ -293,6 +293,7 @@ struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private);
struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client);
u64 ceph_client_gid(struct ceph_client *client);
extern void ceph_destroy_client(struct ceph_client *client);
extern void ceph_reset_client_addr(struct ceph_client *client);
extern int __ceph_open_session(struct ceph_client *client,
unsigned long started);
extern int ceph_open_session(struct ceph_client *client);

1
include/linux/ceph/messenger.h
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@ -337,6 +337,7 @@ extern void ceph_msgr_flush(void);
extern void ceph_messenger_init(struct ceph_messenger *msgr,
struct ceph_entity_addr *myaddr);
extern void ceph_messenger_fini(struct ceph_messenger *msgr);
extern void ceph_messenger_reset_nonce(struct ceph_messenger *msgr);
extern void ceph_con_init(struct ceph_connection *con, void *private,
const struct ceph_connection_operations *ops,

1
include/linux/ceph/mon_client.h
View File

@ -109,6 +109,7 @@ extern int ceph_monmap_contains(struct ceph_monmap *m,
extern int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl);
extern void ceph_monc_stop(struct ceph_mon_client *monc);
extern void ceph_monc_reopen_session(struct ceph_mon_client *monc);
enum {
CEPH_SUB_MONMAP = 0,

1
include/linux/ceph/osd_client.h
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@ -381,6 +381,7 @@ extern void ceph_osdc_cleanup(void);
extern int ceph_osdc_init(struct ceph_osd_client *osdc,
struct ceph_client *client);
extern void ceph_osdc_stop(struct ceph_osd_client *osdc);
extern void ceph_osdc_reopen_osds(struct ceph_osd_client *osdc);
extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
struct ceph_msg *msg);

8
net/ceph/ceph_common.c
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@ -694,6 +694,14 @@ void ceph_destroy_client(struct ceph_client *client)
}
EXPORT_SYMBOL(ceph_destroy_client);
void ceph_reset_client_addr(struct ceph_client *client)
{
ceph_messenger_reset_nonce(&client->msgr);
ceph_monc_reopen_session(&client->monc);
ceph_osdc_reopen_osds(&client->osdc);
}
EXPORT_SYMBOL(ceph_reset_client_addr);
/*
* true if we have the mon map (and have thus joined the cluster)
*/

6
net/ceph/messenger.c
View File

@ -3031,6 +3031,12 @@ static void con_fault(struct ceph_connection *con)
}
void ceph_messenger_reset_nonce(struct ceph_messenger *msgr)
{
u32 nonce = le32_to_cpu(msgr->inst.addr.nonce) + 1000000;
msgr->inst.addr.nonce = cpu_to_le32(nonce);
encode_my_addr(msgr);
}
/*
* initialize a new messenger instance

7
net/ceph/mon_client.c
View File

@ -213,6 +213,13 @@ static void reopen_session(struct ceph_mon_client *monc)
__open_session(monc);
}
void ceph_monc_reopen_session(struct ceph_mon_client *monc)
{
mutex_lock(&monc->mutex);
reopen_session(monc);
mutex_unlock(&monc->mutex);
}
static void un_backoff(struct ceph_mon_client *monc)
{
monc->hunt_mult /= 2; /* reduce by 50% */

18
net/ceph/osd_client.c
View File

@ -5086,6 +5086,24 @@ out_put_req:
}
EXPORT_SYMBOL(ceph_osdc_call);
/*
* reset all osd connections
*/
void ceph_osdc_reopen_osds(struct ceph_osd_client *osdc)
{
struct rb_node *n;
down_write(&osdc->lock);
for (n = rb_first(&osdc->osds); n; ) {
struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
n = rb_next(n);
if (!reopen_osd(osd))
kick_osd_requests(osd);
}
up_write(&osdc->lock);
}
/*
* init, shutdown
*/