diff options
author | Douglas Fuller <dfuller@redhat.com> | 2015-07-22 20:59:52 -0400 |
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committer | Ilya Dryomov <idryomov@gmail.com> | 2016-08-24 23:49:15 +0200 |
commit | 6305a3b415157759bfe4b50a643fac22ea229f5c (patch) | |
tree | 416bf087b76a57a23c179b821fb6dfd20d6f23ae /net/ceph/mon_client.c | |
parent | d4ed4a530562881cc5225050e42d96034f405aae (diff) | |
download | linux-6305a3b415157759bfe4b50a643fac22ea229f5c.tar.bz2 |
libceph: support for blacklisting clients
Reuse ceph_mon_generic_request infrastructure for sending monitor
commands. In particular, add support for 'blacklist add' to prevent
other, non-responsive clients from making further updates.
Signed-off-by: Douglas Fuller <dfuller@redhat.com>
[idryomov@gmail.com: refactor, misc fixes throughout]
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Mike Christie <mchristi@redhat.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Diffstat (limited to 'net/ceph/mon_client.c')
-rw-r--r-- | net/ceph/mon_client.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/net/ceph/mon_client.c b/net/ceph/mon_client.c index ef34a02719d7..a8effc8b7280 100644 --- a/net/ceph/mon_client.c +++ b/net/ceph/mon_client.c @@ -835,6 +835,83 @@ int ceph_monc_get_version_async(struct ceph_mon_client *monc, const char *what, } EXPORT_SYMBOL(ceph_monc_get_version_async); +static void handle_command_ack(struct ceph_mon_client *monc, + struct ceph_msg *msg) +{ + struct ceph_mon_generic_request *req; + void *p = msg->front.iov_base; + void *const end = p + msg->front_alloc_len; + u64 tid = le64_to_cpu(msg->hdr.tid); + + dout("%s msg %p tid %llu\n", __func__, msg, tid); + + ceph_decode_need(&p, end, sizeof(struct ceph_mon_request_header) + + sizeof(u32), bad); + p += sizeof(struct ceph_mon_request_header); + + mutex_lock(&monc->mutex); + req = lookup_generic_request(&monc->generic_request_tree, tid); + if (!req) { + mutex_unlock(&monc->mutex); + return; + } + + req->result = ceph_decode_32(&p); + __finish_generic_request(req); + mutex_unlock(&monc->mutex); + + complete_generic_request(req); + return; + +bad: + pr_err("corrupt mon_command ack, tid %llu\n", tid); + ceph_msg_dump(msg); +} + +int ceph_monc_blacklist_add(struct ceph_mon_client *monc, + struct ceph_entity_addr *client_addr) +{ + struct ceph_mon_generic_request *req; + struct ceph_mon_command *h; + int ret = -ENOMEM; + int len; + + req = alloc_generic_request(monc, GFP_NOIO); + if (!req) + goto out; + + req->request = ceph_msg_new(CEPH_MSG_MON_COMMAND, 256, GFP_NOIO, true); + if (!req->request) + goto out; + + req->reply = ceph_msg_new(CEPH_MSG_MON_COMMAND_ACK, 512, GFP_NOIO, + true); + if (!req->reply) + goto out; + + mutex_lock(&monc->mutex); + register_generic_request(req); + h = req->request->front.iov_base; + h->monhdr.have_version = 0; + h->monhdr.session_mon = cpu_to_le16(-1); + h->monhdr.session_mon_tid = 0; + h->fsid = monc->monmap->fsid; + h->num_strs = cpu_to_le32(1); + len = sprintf(h->str, "{ \"prefix\": \"osd blacklist\", \ + \"blacklistop\": \"add\", \ + \"addr\": \"%pISpc/%u\" }", + &client_addr->in_addr, le32_to_cpu(client_addr->nonce)); + h->str_len = cpu_to_le32(len); + send_generic_request(monc, req); + mutex_unlock(&monc->mutex); + + ret = wait_generic_request(req); +out: + put_generic_request(req); + return ret; +} +EXPORT_SYMBOL(ceph_monc_blacklist_add); + /* * Resend pending generic requests. */ @@ -1139,6 +1216,10 @@ static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) handle_get_version_reply(monc, msg); break; + case CEPH_MSG_MON_COMMAND_ACK: + handle_command_ack(monc, msg); + break; + case CEPH_MSG_MON_MAP: ceph_monc_handle_map(monc, msg); break; @@ -1178,6 +1259,7 @@ 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: + case CEPH_MSG_MON_COMMAND_ACK: return get_generic_reply(con, hdr, skip); case CEPH_MSG_AUTH_REPLY: m = ceph_msg_get(monc->m_auth_reply); |