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Diffstat (limited to 'fs/ceph/mds_client.c')
-rw-r--r--fs/ceph/mds_client.c127
1 files changed, 93 insertions, 34 deletions
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 5f62fb7a5d0a..71c073f38e54 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -480,6 +480,7 @@ static struct ceph_mds_session *register_session(struct ceph_mds_client *mdsc,
mdsc->max_sessions = newmax;
}
mdsc->sessions[mds] = s;
+ atomic_inc(&mdsc->num_sessions);
atomic_inc(&s->s_ref); /* one ref to sessions[], one to caller */
ceph_con_open(&s->s_con, CEPH_ENTITY_TYPE_MDS, mds,
@@ -503,6 +504,7 @@ static void __unregister_session(struct ceph_mds_client *mdsc,
mdsc->sessions[s->s_mds] = NULL;
ceph_con_close(&s->s_con);
ceph_put_mds_session(s);
+ atomic_dec(&mdsc->num_sessions);
}
/*
@@ -842,8 +844,9 @@ static struct ceph_msg *create_session_open_msg(struct ceph_mds_client *mdsc, u6
struct ceph_options *opt = mdsc->fsc->client->options;
void *p;
- const char* metadata[3][2] = {
+ const char* metadata[][2] = {
{"hostname", utsname()->nodename},
+ {"kernel_version", utsname()->release},
{"entity_id", opt->name ? opt->name : ""},
{NULL, NULL}
};
@@ -1464,19 +1467,33 @@ out_unlocked:
return err;
}
+static int check_cap_flush(struct inode *inode, u64 want_flush_seq)
+{
+ struct ceph_inode_info *ci = ceph_inode(inode);
+ int ret;
+ spin_lock(&ci->i_ceph_lock);
+ if (ci->i_flushing_caps)
+ ret = ci->i_cap_flush_seq >= want_flush_seq;
+ else
+ ret = 1;
+ spin_unlock(&ci->i_ceph_lock);
+ return ret;
+}
+
/*
* flush all dirty inode data to disk.
*
* returns true if we've flushed through want_flush_seq
*/
-static int check_cap_flush(struct ceph_mds_client *mdsc, u64 want_flush_seq)
+static void wait_caps_flush(struct ceph_mds_client *mdsc, u64 want_flush_seq)
{
- int mds, ret = 1;
+ int mds;
dout("check_cap_flush want %lld\n", want_flush_seq);
mutex_lock(&mdsc->mutex);
- for (mds = 0; ret && mds < mdsc->max_sessions; mds++) {
+ for (mds = 0; mds < mdsc->max_sessions; mds++) {
struct ceph_mds_session *session = mdsc->sessions[mds];
+ struct inode *inode = NULL;
if (!session)
continue;
@@ -1489,29 +1506,29 @@ static int check_cap_flush(struct ceph_mds_client *mdsc, u64 want_flush_seq)
list_entry(session->s_cap_flushing.next,
struct ceph_inode_info,
i_flushing_item);
- struct inode *inode = &ci->vfs_inode;
- spin_lock(&ci->i_ceph_lock);
- if (ci->i_cap_flush_seq <= want_flush_seq) {
+ if (!check_cap_flush(&ci->vfs_inode, want_flush_seq)) {
dout("check_cap_flush still flushing %p "
- "seq %lld <= %lld to mds%d\n", inode,
- ci->i_cap_flush_seq, want_flush_seq,
- session->s_mds);
- ret = 0;
+ "seq %lld <= %lld to mds%d\n",
+ &ci->vfs_inode, ci->i_cap_flush_seq,
+ want_flush_seq, session->s_mds);
+ inode = igrab(&ci->vfs_inode);
}
- spin_unlock(&ci->i_ceph_lock);
}
mutex_unlock(&session->s_mutex);
ceph_put_mds_session(session);
- if (!ret)
- return ret;
+ if (inode) {
+ wait_event(mdsc->cap_flushing_wq,
+ check_cap_flush(inode, want_flush_seq));
+ iput(inode);
+ }
+
mutex_lock(&mdsc->mutex);
}
mutex_unlock(&mdsc->mutex);
dout("check_cap_flush ok, flushed thru %lld\n", want_flush_seq);
- return ret;
}
/*
@@ -1923,7 +1940,11 @@ static struct ceph_msg *create_request_message(struct ceph_mds_client *mdsc,
head->num_releases = cpu_to_le16(releases);
/* time stamp */
- ceph_encode_copy(&p, &req->r_stamp, sizeof(req->r_stamp));
+ {
+ struct ceph_timespec ts;
+ ceph_encode_timespec(&ts, &req->r_stamp);
+ ceph_encode_copy(&p, &ts, sizeof(ts));
+ }
BUG_ON(p > end);
msg->front.iov_len = p - msg->front.iov_base;
@@ -2012,7 +2033,11 @@ static int __prepare_send_request(struct ceph_mds_client *mdsc,
/* time stamp */
p = msg->front.iov_base + req->r_request_release_offset;
- ceph_encode_copy(&p, &req->r_stamp, sizeof(req->r_stamp));
+ {
+ struct ceph_timespec ts;
+ ceph_encode_timespec(&ts, &req->r_stamp);
+ ceph_encode_copy(&p, &ts, sizeof(ts));
+ }
msg->front.iov_len = p - msg->front.iov_base;
msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
@@ -2159,6 +2184,8 @@ static void kick_requests(struct ceph_mds_client *mdsc, int mds)
p = rb_next(p);
if (req->r_got_unsafe)
continue;
+ if (req->r_attempts > 0)
+ continue; /* only new requests */
if (req->r_session &&
req->r_session->s_mds == mds) {
dout(" kicking tid %llu\n", req->r_tid);
@@ -2286,6 +2313,7 @@ static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg)
struct ceph_mds_request *req;
struct ceph_mds_reply_head *head = msg->front.iov_base;
struct ceph_mds_reply_info_parsed *rinfo; /* parsed reply info */
+ struct ceph_snap_realm *realm;
u64 tid;
int err, result;
int mds = session->s_mds;
@@ -2401,11 +2429,13 @@ static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg)
}
/* snap trace */
+ realm = NULL;
if (rinfo->snapblob_len) {
down_write(&mdsc->snap_rwsem);
ceph_update_snap_trace(mdsc, rinfo->snapblob,
- rinfo->snapblob + rinfo->snapblob_len,
- le32_to_cpu(head->op) == CEPH_MDS_OP_RMSNAP);
+ rinfo->snapblob + rinfo->snapblob_len,
+ le32_to_cpu(head->op) == CEPH_MDS_OP_RMSNAP,
+ &realm);
downgrade_write(&mdsc->snap_rwsem);
} else {
down_read(&mdsc->snap_rwsem);
@@ -2423,6 +2453,8 @@ static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg)
mutex_unlock(&req->r_fill_mutex);
up_read(&mdsc->snap_rwsem);
+ if (realm)
+ ceph_put_snap_realm(mdsc, realm);
out_err:
mutex_lock(&mdsc->mutex);
if (!req->r_aborted) {
@@ -2487,6 +2519,7 @@ static void handle_forward(struct ceph_mds_client *mdsc,
dout("forward tid %llu to mds%d (we resend)\n", tid, next_mds);
BUG_ON(req->r_err);
BUG_ON(req->r_got_result);
+ req->r_attempts = 0;
req->r_num_fwd = fwd_seq;
req->r_resend_mds = next_mds;
put_request_session(req);
@@ -2580,6 +2613,14 @@ static void handle_session(struct ceph_mds_session *session,
send_flushmsg_ack(mdsc, session, seq);
break;
+ case CEPH_SESSION_FORCE_RO:
+ dout("force_session_readonly %p\n", session);
+ spin_lock(&session->s_cap_lock);
+ session->s_readonly = true;
+ spin_unlock(&session->s_cap_lock);
+ wake_up_session_caps(session, 0);
+ break;
+
default:
pr_err("mdsc_handle_session bad op %d mds%d\n", op, mds);
WARN_ON(1);
@@ -2610,6 +2651,7 @@ static void replay_unsafe_requests(struct ceph_mds_client *mdsc,
struct ceph_mds_session *session)
{
struct ceph_mds_request *req, *nreq;
+ struct rb_node *p;
int err;
dout("replay_unsafe_requests mds%d\n", session->s_mds);
@@ -2622,6 +2664,28 @@ static void replay_unsafe_requests(struct ceph_mds_client *mdsc,
ceph_con_send(&session->s_con, req->r_request);
}
}
+
+ /*
+ * also re-send old requests when MDS enters reconnect stage. So that MDS
+ * can process completed request in clientreplay stage.
+ */
+ p = rb_first(&mdsc->request_tree);
+ while (p) {
+ req = rb_entry(p, struct ceph_mds_request, r_node);
+ p = rb_next(p);
+ if (req->r_got_unsafe)
+ continue;
+ if (req->r_attempts == 0)
+ continue; /* only old requests */
+ if (req->r_session &&
+ req->r_session->s_mds == session->s_mds) {
+ err = __prepare_send_request(mdsc, req, session->s_mds);
+ if (!err) {
+ ceph_msg_get(req->r_request);
+ ceph_con_send(&session->s_con, req->r_request);
+ }
+ }
+ }
mutex_unlock(&mdsc->mutex);
}
@@ -2787,6 +2851,8 @@ static void send_mds_reconnect(struct ceph_mds_client *mdsc,
spin_unlock(&session->s_gen_ttl_lock);
spin_lock(&session->s_cap_lock);
+ /* don't know if session is readonly */
+ session->s_readonly = 0;
/*
* notify __ceph_remove_cap() that we are composing cap reconnect.
* If a cap get released before being added to the cap reconnect,
@@ -2933,9 +2999,6 @@ static void check_new_map(struct ceph_mds_client *mdsc,
mutex_unlock(&s->s_mutex);
s->s_state = CEPH_MDS_SESSION_RESTARTING;
}
-
- /* kick any requests waiting on the recovering mds */
- kick_requests(mdsc, i);
} else if (oldstate == newstate) {
continue; /* nothing new with this mds */
}
@@ -3295,6 +3358,7 @@ int ceph_mdsc_init(struct ceph_fs_client *fsc)
init_waitqueue_head(&mdsc->session_close_wq);
INIT_LIST_HEAD(&mdsc->waiting_for_map);
mdsc->sessions = NULL;
+ atomic_set(&mdsc->num_sessions, 0);
mdsc->max_sessions = 0;
mdsc->stopping = 0;
init_rwsem(&mdsc->snap_rwsem);
@@ -3428,14 +3492,17 @@ void ceph_mdsc_sync(struct ceph_mds_client *mdsc)
dout("sync\n");
mutex_lock(&mdsc->mutex);
want_tid = mdsc->last_tid;
- want_flush = mdsc->cap_flush_seq;
mutex_unlock(&mdsc->mutex);
- dout("sync want tid %lld flush_seq %lld\n", want_tid, want_flush);
ceph_flush_dirty_caps(mdsc);
+ spin_lock(&mdsc->cap_dirty_lock);
+ want_flush = mdsc->cap_flush_seq;
+ spin_unlock(&mdsc->cap_dirty_lock);
+
+ dout("sync want tid %lld flush_seq %lld\n", want_tid, want_flush);
wait_unsafe_requests(mdsc, want_tid);
- wait_event(mdsc->cap_flushing_wq, check_cap_flush(mdsc, want_flush));
+ wait_caps_flush(mdsc, want_flush);
}
/*
@@ -3443,17 +3510,9 @@ void ceph_mdsc_sync(struct ceph_mds_client *mdsc)
*/
static bool done_closing_sessions(struct ceph_mds_client *mdsc)
{
- int i, n = 0;
-
if (mdsc->fsc->mount_state == CEPH_MOUNT_SHUTDOWN)
return true;
-
- mutex_lock(&mdsc->mutex);
- for (i = 0; i < mdsc->max_sessions; i++)
- if (mdsc->sessions[i])
- n++;
- mutex_unlock(&mdsc->mutex);
- return n == 0;
+ return atomic_read(&mdsc->num_sessions) == 0;
}
/*
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.