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ceph: make mon client statfs handling more generic

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This is being done so that we could reuse the statfs
infrastructure with other requests that return values.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Yehuda Sadeh
2010-04-22 15:40:37 -07:00
committed by Sage Weil
parent dbad185d49
commit f8c76f6f25
3 changed files with 58 additions and 52 deletions
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82
fs/ceph/mon_client.c
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@@ -353,14 +353,14 @@ out:
/*
* statfs
*/
static struct ceph_mon_statfs_request *__lookup_statfs(
static struct ceph_mon_generic_request *__lookup_generic_req(
struct ceph_mon_client *monc, u64 tid)
{
struct ceph_mon_statfs_request *req;
struct rb_node *n = monc->statfs_request_tree.rb_node;
struct ceph_mon_generic_request *req;
struct rb_node *n = monc->generic_request_tree.rb_node;
while (n) {
req = rb_entry(n, struct ceph_mon_statfs_request, node);
req = rb_entry(n, struct ceph_mon_generic_request, node);
if (tid < req->tid)
n = n->rb_left;
else if (tid > req->tid)
@@ -371,16 +371,16 @@ static struct ceph_mon_statfs_request *__lookup_statfs(
return NULL;
}
static void __insert_statfs(struct ceph_mon_client *monc,
struct ceph_mon_statfs_request *new)
static void __insert_generic_request(struct ceph_mon_client *monc,
struct ceph_mon_generic_request *new)
{
struct rb_node **p = &monc->statfs_request_tree.rb_node;
struct rb_node **p = &monc->generic_request_tree.rb_node;
struct rb_node *parent = NULL;
struct ceph_mon_statfs_request *req = NULL;
struct ceph_mon_generic_request *req = NULL;
while (*p) {
parent = *p;
req = rb_entry(parent, struct ceph_mon_statfs_request, node);
req = rb_entry(parent, struct ceph_mon_generic_request, node);
if (new->tid < req->tid)
p = &(*p)->rb_left;
else if (new->tid > req->tid)
@@ -390,13 +390,13 @@ static void __insert_statfs(struct ceph_mon_client *monc,
}
rb_link_node(&new->node, parent, p);
rb_insert_color(&new->node, &monc->statfs_request_tree);
rb_insert_color(&new->node, &monc->generic_request_tree);
}
static void release_statfs_request(struct kref *kref)
static void release_generic_request(struct kref *kref)
{
struct ceph_mon_statfs_request *req =
container_of(kref, struct ceph_mon_statfs_request, kref);
struct ceph_mon_generic_request *req =
container_of(kref, struct ceph_mon_generic_request, kref);
if (req->reply)
ceph_msg_put(req->reply);
@@ -404,33 +404,33 @@ static void release_statfs_request(struct kref *kref)
ceph_msg_put(req->request);
}
static void put_statfs_request(struct ceph_mon_statfs_request *req)
static void put_generic_request(struct ceph_mon_generic_request *req)
{
kref_put(&req->kref, release_statfs_request);
kref_put(&req->kref, release_generic_request);
}
static void get_statfs_request(struct ceph_mon_statfs_request *req)
static void get_generic_request(struct ceph_mon_generic_request *req)
{
kref_get(&req->kref);
}
static struct ceph_msg *get_statfs_reply(struct ceph_connection *con,
static struct ceph_msg *get_generic_reply(struct ceph_connection *con,
struct ceph_msg_header *hdr,
int *skip)
{
struct ceph_mon_client *monc = con->private;
struct ceph_mon_statfs_request *req;
struct ceph_mon_generic_request *req;
u64 tid = le64_to_cpu(hdr->tid);
struct ceph_msg *m;
mutex_lock(&monc->mutex);
req = __lookup_statfs(monc, tid);
req = __lookup_generic_req(monc, tid);
if (!req) {
dout("get_statfs_reply %lld dne\n", tid);
dout("get_generic_reply %lld dne\n", tid);
*skip = 1;
m = NULL;
} else {
dout("get_statfs_reply %lld got %p\n", tid, req->reply);
dout("get_generic_reply %lld got %p\n", tid, req->reply);
m = ceph_msg_get(req->reply);
/*
* we don't need to track the connection reading into
@@ -445,7 +445,7 @@ static struct ceph_msg *get_statfs_reply(struct ceph_connection *con,
static void handle_statfs_reply(struct ceph_mon_client *monc,
struct ceph_msg *msg)
{
struct ceph_mon_statfs_request *req;
struct ceph_mon_generic_request *req;
struct ceph_mon_statfs_reply *reply = msg->front.iov_base;
u64 tid = le64_to_cpu(msg->hdr.tid);
@@ -454,21 +454,21 @@ static void handle_statfs_reply(struct ceph_mon_client *monc,
dout("handle_statfs_reply %p tid %llu\n", msg, tid);
mutex_lock(&monc->mutex);
req = __lookup_statfs(monc, tid);
req = __lookup_generic_req(monc, tid);
if (req) {
*req->buf = reply->st;
*(struct ceph_statfs *)req->buf = reply->st;
req->result = 0;
get_statfs_request(req);
get_generic_request(req);
}
mutex_unlock(&monc->mutex);
if (req) {
complete(&req->completion);
put_statfs_request(req);
put_generic_request(req);
}
return;
bad:
pr_err("corrupt statfs reply, no tid\n");
pr_err("corrupt generic reply, no tid\n");
ceph_msg_dump(msg);
}
@@ -477,7 +477,7 @@ bad:
*/
int ceph_monc_do_statfs(struct ceph_mon_client *monc, struct ceph_statfs *buf)
{
struct ceph_mon_statfs_request *req;
struct ceph_mon_generic_request *req;
struct ceph_mon_statfs *h;
int err;
@@ -509,8 +509,8 @@ int ceph_monc_do_statfs(struct ceph_mon_client *monc, struct ceph_statfs *buf)
mutex_lock(&monc->mutex);
req->tid = ++monc->last_tid;
req->request->hdr.tid = cpu_to_le64(req->tid);
__insert_statfs(monc, req);
monc->num_statfs_requests++;
__insert_generic_request(monc, req);
monc->num_generic_requests++;
mutex_unlock(&monc->mutex);
/* send request and wait */
@@ -518,28 +518,28 @@ int ceph_monc_do_statfs(struct ceph_mon_client *monc, struct ceph_statfs *buf)
err = wait_for_completion_interruptible(&req->completion);
mutex_lock(&monc->mutex);
rb_erase(&req->node, &monc->statfs_request_tree);
monc->num_statfs_requests--;
rb_erase(&req->node, &monc->generic_request_tree);
monc->num_generic_requests--;
mutex_unlock(&monc->mutex);
if (!err)
err = req->result;
out:
kref_put(&req->kref, release_statfs_request);
kref_put(&req->kref, release_generic_request);
return err;
}
/*
* Resend pending statfs requests.
*/
static void __resend_statfs(struct ceph_mon_client *monc)
static void __resend_generic_request(struct ceph_mon_client *monc)
{
struct ceph_mon_statfs_request *req;
struct ceph_mon_generic_request *req;
struct rb_node *p;
for (p = rb_first(&monc->statfs_request_tree); p; p = rb_next(p)) {
req = rb_entry(p, struct ceph_mon_statfs_request, node);
for (p = rb_first(&monc->generic_request_tree); p; p = rb_next(p)) {
req = rb_entry(p, struct ceph_mon_generic_request, node);
ceph_con_send(monc->con, ceph_msg_get(req->request));
}
}
@@ -652,8 +652,8 @@ int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl)
monc->sub_sent = 0;
INIT_DELAYED_WORK(&monc->delayed_work, delayed_work);
monc->statfs_request_tree = RB_ROOT;
monc->num_statfs_requests = 0;
monc->generic_request_tree = RB_ROOT;
monc->num_generic_requests = 0;
monc->last_tid = 0;
monc->have_mdsmap = 0;
@@ -717,7 +717,7 @@ static void handle_auth_reply(struct ceph_mon_client *monc,
monc->client->msgr->inst.name.num = monc->auth->global_id;
__send_subscribe(monc);
__resend_statfs(monc);
__resend_generic_request(monc);
}
mutex_unlock(&monc->mutex);
}
@@ -809,7 +809,7 @@ static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con,
m = ceph_msg_get(monc->m_subscribe_ack);
break;
case CEPH_MSG_STATFS_REPLY:
return get_statfs_reply(con, hdr, skip);
return get_generic_reply(con, hdr, skip);
case CEPH_MSG_AUTH_REPLY:
m = ceph_msg_get(monc->m_auth_reply);
break;