static struct kmem_cache *ceph_msg_cache;
-/* static tag bytes (protocol control messages) */
-static char tag_msg = CEPH_MSGR_TAG_MSG;
-static char tag_ack = CEPH_MSGR_TAG_ACK;
-static char tag_keepalive = CEPH_MSGR_TAG_KEEPALIVE;
-static char tag_keepalive2 = CEPH_MSGR_TAG_KEEPALIVE2;
-
#ifdef CONFIG_LOCKDEP
static struct lock_class_key socket_class;
#endif
return 0;
}
-/*
- * If @buf is NULL, discard up to @len bytes.
- */
-static int ceph_tcp_recvmsg(struct socket *sock, void *buf, size_t len)
-{
- struct kvec iov = {buf, len};
- struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL };
- int r;
-
- if (!buf)
- msg.msg_flags |= MSG_TRUNC;
-
- iov_iter_kvec(&msg.msg_iter, READ, &iov, 1, len);
- r = sock_recvmsg(sock, &msg, msg.msg_flags);
- if (r == -EAGAIN)
- r = 0;
- return r;
-}
-
-static int ceph_tcp_recvpage(struct socket *sock, struct page *page,
- int page_offset, size_t length)
-{
- struct bio_vec bvec = {
- .bv_page = page,
- .bv_offset = page_offset,
- .bv_len = length
- };
- struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL };
- int r;
-
- BUG_ON(page_offset + length > PAGE_SIZE);
- iov_iter_bvec(&msg.msg_iter, READ, &bvec, 1, length);
- r = sock_recvmsg(sock, &msg, msg.msg_flags);
- if (r == -EAGAIN)
- r = 0;
- return r;
-}
-
-/*
- * write something. @more is true if caller will be sending more data
- * shortly.
- */
-static int ceph_tcp_sendmsg(struct socket *sock, struct kvec *iov,
- size_t kvlen, size_t len, bool more)
-{
- struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL };
- int r;
-
- if (more)
- msg.msg_flags |= MSG_MORE;
- else
- msg.msg_flags |= MSG_EOR; /* superfluous, but what the hell */
-
- r = kernel_sendmsg(sock, &msg, iov, kvlen, len);
- if (r == -EAGAIN)
- r = 0;
- return r;
-}
-
-/*
- * @more: either or both of MSG_MORE and MSG_SENDPAGE_NOTLAST
- */
-static int ceph_tcp_sendpage(struct socket *sock, struct page *page,
- int offset, size_t size, int more)
-{
- ssize_t (*sendpage)(struct socket *sock, struct page *page,
- int offset, size_t size, int flags);
- int flags = MSG_DONTWAIT | MSG_NOSIGNAL | more;
- int ret;
-
- /*
- * sendpage cannot properly handle pages with page_count == 0,
- * we need to fall back to sendmsg if that's the case.
- *
- * Same goes for slab pages: skb_can_coalesce() allows
- * coalescing neighboring slab objects into a single frag which
- * triggers one of hardened usercopy checks.
- */
- if (sendpage_ok(page))
- sendpage = sock->ops->sendpage;
- else
- sendpage = sock_no_sendpage;
-
- ret = sendpage(sock, page, offset, size, flags);
- if (ret == -EAGAIN)
- ret = 0;
-
- return ret;
-}
-
/*
* Shutdown/close the socket for the given connection.
*/
return rc;
}
-void ceph_con_v1_reset_protocol(struct ceph_connection *con)
-{
- con->out_skip = 0;
-}
-
static void ceph_con_reset_protocol(struct ceph_connection *con)
{
dout("%s con %p\n", __func__, con);
}
}
-void ceph_con_v1_reset_session(struct ceph_connection *con)
-{
- con->connect_seq = 0;
- con->peer_global_seq = 0;
-}
-
void ceph_con_reset_session(struct ceph_connection *con)
{
dout("%s con %p\n", __func__, con);
}
EXPORT_SYMBOL(ceph_con_open);
-bool ceph_con_v1_opened(struct ceph_connection *con)
-{
- return con->connect_seq;
-}
-
/*
* return true if this connection ever successfully opened
*/
}
EXPORT_SYMBOL(ceph_con_init);
-
/*
* We maintain a global counter to order connection attempts. Get
* a unique seq greater than @gt.
}
}
-static void con_out_kvec_reset(struct ceph_connection *con)
-{
- BUG_ON(con->out_skip);
-
- con->out_kvec_left = 0;
- con->out_kvec_bytes = 0;
- con->out_kvec_cur = &con->out_kvec[0];
-}
-
-static void con_out_kvec_add(struct ceph_connection *con,
- size_t size, void *data)
-{
- int index = con->out_kvec_left;
-
- BUG_ON(con->out_skip);
- BUG_ON(index >= ARRAY_SIZE(con->out_kvec));
-
- con->out_kvec[index].iov_len = size;
- con->out_kvec[index].iov_base = data;
- con->out_kvec_left++;
- con->out_kvec_bytes += size;
-}
-
-/*
- * Chop off a kvec from the end. Return residual number of bytes for
- * that kvec, i.e. how many bytes would have been written if the kvec
- * hadn't been nuked.
- */
-static int con_out_kvec_skip(struct ceph_connection *con)
-{
- int off = con->out_kvec_cur - con->out_kvec;
- int skip = 0;
-
- if (con->out_kvec_bytes > 0) {
- skip = con->out_kvec[off + con->out_kvec_left - 1].iov_len;
- BUG_ON(con->out_kvec_bytes < skip);
- BUG_ON(!con->out_kvec_left);
- con->out_kvec_bytes -= skip;
- con->out_kvec_left--;
- }
-
- return skip;
-}
-
#ifdef CONFIG_BLOCK
/*
cursor->need_crc = new_piece;
}
-static size_t sizeof_footer(struct ceph_connection *con)
-{
- return (con->peer_features & CEPH_FEATURE_MSG_AUTH) ?
- sizeof(struct ceph_msg_footer) :
- sizeof(struct ceph_msg_footer_old);
-}
-
-static void prepare_message_data(struct ceph_msg *msg, u32 data_len)
-{
- /* Initialize data cursor */
-
- ceph_msg_data_cursor_init(&msg->cursor, msg, data_len);
-}
-
-/*
- * Prepare footer for currently outgoing message, and finish things
- * off. Assumes out_kvec* are already valid.. we just add on to the end.
- */
-static void prepare_write_message_footer(struct ceph_connection *con)
-{
- struct ceph_msg *m = con->out_msg;
-
- m->footer.flags |= CEPH_MSG_FOOTER_COMPLETE;
-
- dout("prepare_write_message_footer %p\n", con);
- con_out_kvec_add(con, sizeof_footer(con), &m->footer);
- if (con->peer_features & CEPH_FEATURE_MSG_AUTH) {
- if (con->ops->sign_message)
- con->ops->sign_message(m);
- else
- m->footer.sig = 0;
- } else {
- m->old_footer.flags = m->footer.flags;
- }
- con->out_more = m->more_to_follow;
- con->out_msg_done = true;
-}
-
-/*
- * Prepare headers for the next outgoing message.
- */
-static void prepare_write_message(struct ceph_connection *con)
-{
- struct ceph_msg *m;
- u32 crc;
-
- con_out_kvec_reset(con);
- con->out_msg_done = false;
-
- /* Sneak an ack in there first? If we can get it into the same
- * TCP packet that's a good thing. */
- if (con->in_seq > con->in_seq_acked) {
- con->in_seq_acked = con->in_seq;
- con_out_kvec_add(con, sizeof (tag_ack), &tag_ack);
- con->out_temp_ack = cpu_to_le64(con->in_seq_acked);
- con_out_kvec_add(con, sizeof (con->out_temp_ack),
- &con->out_temp_ack);
- }
-
- ceph_con_get_out_msg(con);
- m = con->out_msg;
-
- dout("prepare_write_message %p seq %lld type %d len %d+%d+%zd\n",
- m, con->out_seq, le16_to_cpu(m->hdr.type),
- le32_to_cpu(m->hdr.front_len), le32_to_cpu(m->hdr.middle_len),
- m->data_length);
- WARN_ON(m->front.iov_len != le32_to_cpu(m->hdr.front_len));
- WARN_ON(m->data_length != le32_to_cpu(m->hdr.data_len));
-
- /* tag + hdr + front + middle */
- con_out_kvec_add(con, sizeof (tag_msg), &tag_msg);
- con_out_kvec_add(con, sizeof(con->out_hdr), &con->out_hdr);
- con_out_kvec_add(con, m->front.iov_len, m->front.iov_base);
-
- if (m->middle)
- con_out_kvec_add(con, m->middle->vec.iov_len,
- m->middle->vec.iov_base);
-
- /* fill in hdr crc and finalize hdr */
- crc = crc32c(0, &m->hdr, offsetof(struct ceph_msg_header, crc));
- con->out_msg->hdr.crc = cpu_to_le32(crc);
- memcpy(&con->out_hdr, &con->out_msg->hdr, sizeof(con->out_hdr));
-
- /* fill in front and middle crc, footer */
- crc = crc32c(0, m->front.iov_base, m->front.iov_len);
- con->out_msg->footer.front_crc = cpu_to_le32(crc);
- if (m->middle) {
- crc = crc32c(0, m->middle->vec.iov_base,
- m->middle->vec.iov_len);
- con->out_msg->footer.middle_crc = cpu_to_le32(crc);
- } else
- con->out_msg->footer.middle_crc = 0;
- dout("%s front_crc %u middle_crc %u\n", __func__,
- le32_to_cpu(con->out_msg->footer.front_crc),
- le32_to_cpu(con->out_msg->footer.middle_crc));
- con->out_msg->footer.flags = 0;
-
- /* is there a data payload? */
- con->out_msg->footer.data_crc = 0;
- if (m->data_length) {
- prepare_message_data(con->out_msg, m->data_length);
- con->out_more = 1; /* data + footer will follow */
- } else {
- /* no, queue up footer too and be done */
- prepare_write_message_footer(con);
- }
-
- ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING);
-}
-
-/*
- * Prepare an ack.
- */
-static void prepare_write_ack(struct ceph_connection *con)
-{
- dout("prepare_write_ack %p %llu -> %llu\n", con,
- con->in_seq_acked, con->in_seq);
- con->in_seq_acked = con->in_seq;
-
- con_out_kvec_reset(con);
-
- con_out_kvec_add(con, sizeof (tag_ack), &tag_ack);
-
- con->out_temp_ack = cpu_to_le64(con->in_seq_acked);
- con_out_kvec_add(con, sizeof (con->out_temp_ack),
- &con->out_temp_ack);
-
- con->out_more = 1; /* more will follow.. eventually.. */
- ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING);
-}
-
-/*
- * Prepare to share the seq during handshake
- */
-static void prepare_write_seq(struct ceph_connection *con)
-{
- dout("prepare_write_seq %p %llu -> %llu\n", con,
- con->in_seq_acked, con->in_seq);
- con->in_seq_acked = con->in_seq;
-
- con_out_kvec_reset(con);
-
- con->out_temp_ack = cpu_to_le64(con->in_seq_acked);
- con_out_kvec_add(con, sizeof (con->out_temp_ack),
- &con->out_temp_ack);
-
- ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING);
-}
-
-/*
- * Prepare to write keepalive byte.
- */
-static void prepare_write_keepalive(struct ceph_connection *con)
-{
- dout("prepare_write_keepalive %p\n", con);
- con_out_kvec_reset(con);
- if (con->peer_features & CEPH_FEATURE_MSGR_KEEPALIVE2) {
- struct timespec64 now;
-
- ktime_get_real_ts64(&now);
- con_out_kvec_add(con, sizeof(tag_keepalive2), &tag_keepalive2);
- ceph_encode_timespec64(&con->out_temp_keepalive2, &now);
- con_out_kvec_add(con, sizeof(con->out_temp_keepalive2),
- &con->out_temp_keepalive2);
- } else {
- con_out_kvec_add(con, sizeof(tag_keepalive), &tag_keepalive);
- }
- ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING);
-}
-
-/*
- * Connection negotiation.
- */
-
-static int get_connect_authorizer(struct ceph_connection *con)
-{
- struct ceph_auth_handshake *auth;
- int auth_proto;
-
- if (!con->ops->get_authorizer) {
- con->auth = NULL;
- con->out_connect.authorizer_protocol = CEPH_AUTH_UNKNOWN;
- con->out_connect.authorizer_len = 0;
- return 0;
- }
-
- auth = con->ops->get_authorizer(con, &auth_proto, con->auth_retry);
- if (IS_ERR(auth))
- return PTR_ERR(auth);
-
- con->auth = auth;
- con->out_connect.authorizer_protocol = cpu_to_le32(auth_proto);
- con->out_connect.authorizer_len = cpu_to_le32(auth->authorizer_buf_len);
- return 0;
-}
-
-/*
- * We connected to a peer and are saying hello.
- */
-static void prepare_write_banner(struct ceph_connection *con)
-{
- con_out_kvec_add(con, strlen(CEPH_BANNER), CEPH_BANNER);
- con_out_kvec_add(con, sizeof (con->msgr->my_enc_addr),
- &con->msgr->my_enc_addr);
-
- con->out_more = 0;
- ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING);
-}
-
-static void __prepare_write_connect(struct ceph_connection *con)
-{
- con_out_kvec_add(con, sizeof(con->out_connect), &con->out_connect);
- if (con->auth)
- con_out_kvec_add(con, con->auth->authorizer_buf_len,
- con->auth->authorizer_buf);
-
- con->out_more = 0;
- ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING);
-}
-
-static int prepare_write_connect(struct ceph_connection *con)
-{
- unsigned int global_seq = ceph_get_global_seq(con->msgr, 0);
- int proto;
- int ret;
-
- switch (con->peer_name.type) {
- case CEPH_ENTITY_TYPE_MON:
- proto = CEPH_MONC_PROTOCOL;
- break;
- case CEPH_ENTITY_TYPE_OSD:
- proto = CEPH_OSDC_PROTOCOL;
- break;
- case CEPH_ENTITY_TYPE_MDS:
- proto = CEPH_MDSC_PROTOCOL;
- break;
- default:
- BUG();
- }
-
- dout("prepare_write_connect %p cseq=%d gseq=%d proto=%d\n", con,
- con->connect_seq, global_seq, proto);
-
- con->out_connect.features =
- cpu_to_le64(from_msgr(con->msgr)->supported_features);
- con->out_connect.host_type = cpu_to_le32(CEPH_ENTITY_TYPE_CLIENT);
- con->out_connect.connect_seq = cpu_to_le32(con->connect_seq);
- con->out_connect.global_seq = cpu_to_le32(global_seq);
- con->out_connect.protocol_version = cpu_to_le32(proto);
- con->out_connect.flags = 0;
-
- ret = get_connect_authorizer(con);
- if (ret)
- return ret;
-
- __prepare_write_connect(con);
- return 0;
-}
-
-/*
- * write as much of pending kvecs to the socket as we can.
- * 1 -> done
- * 0 -> socket full, but more to do
- * <0 -> error
- */
-static int write_partial_kvec(struct ceph_connection *con)
-{
- int ret;
-
- dout("write_partial_kvec %p %d left\n", con, con->out_kvec_bytes);
- while (con->out_kvec_bytes > 0) {
- ret = ceph_tcp_sendmsg(con->sock, con->out_kvec_cur,
- con->out_kvec_left, con->out_kvec_bytes,
- con->out_more);
- if (ret <= 0)
- goto out;
- con->out_kvec_bytes -= ret;
- if (con->out_kvec_bytes == 0)
- break; /* done */
-
- /* account for full iov entries consumed */
- while (ret >= con->out_kvec_cur->iov_len) {
- BUG_ON(!con->out_kvec_left);
- ret -= con->out_kvec_cur->iov_len;
- con->out_kvec_cur++;
- con->out_kvec_left--;
- }
- /* and for a partially-consumed entry */
- if (ret) {
- con->out_kvec_cur->iov_len -= ret;
- con->out_kvec_cur->iov_base += ret;
- }
- }
- con->out_kvec_left = 0;
- ret = 1;
-out:
- dout("write_partial_kvec %p %d left in %d kvecs ret = %d\n", con,
- con->out_kvec_bytes, con->out_kvec_left, ret);
- return ret; /* done! */
-}
-
u32 ceph_crc32c_page(u32 crc, struct page *page, unsigned int page_offset,
unsigned int length)
{
return crc;
}
-/*
- * Write as much message data payload as we can. If we finish, queue
- * up the footer.
- * 1 -> done, footer is now queued in out_kvec[].
- * 0 -> socket full, but more to do
- * <0 -> error
- */
-static int write_partial_message_data(struct ceph_connection *con)
-{
- struct ceph_msg *msg = con->out_msg;
- struct ceph_msg_data_cursor *cursor = &msg->cursor;
- bool do_datacrc = !ceph_test_opt(from_msgr(con->msgr), NOCRC);
- int more = MSG_MORE | MSG_SENDPAGE_NOTLAST;
- u32 crc;
-
- dout("%s %p msg %p\n", __func__, con, msg);
-
- if (!msg->num_data_items)
- return -EINVAL;
-
- /*
- * Iterate through each page that contains data to be
- * written, and send as much as possible for each.
- *
- * If we are calculating the data crc (the default), we will
- * need to map the page. If we have no pages, they have
- * been revoked, so use the zero page.
- */
- crc = do_datacrc ? le32_to_cpu(msg->footer.data_crc) : 0;
- while (cursor->total_resid) {
- struct page *page;
- size_t page_offset;
- size_t length;
- int ret;
-
- if (!cursor->resid) {
- ceph_msg_data_advance(cursor, 0);
- continue;
- }
-
- page = ceph_msg_data_next(cursor, &page_offset, &length, NULL);
- if (length == cursor->total_resid)
- more = MSG_MORE;
- ret = ceph_tcp_sendpage(con->sock, page, page_offset, length,
- more);
- if (ret <= 0) {
- if (do_datacrc)
- msg->footer.data_crc = cpu_to_le32(crc);
-
- return ret;
- }
- if (do_datacrc && cursor->need_crc)
- crc = ceph_crc32c_page(crc, page, page_offset, length);
- ceph_msg_data_advance(cursor, (size_t)ret);
- }
-
- dout("%s %p msg %p done\n", __func__, con, msg);
-
- /* prepare and queue up footer, too */
- if (do_datacrc)
- msg->footer.data_crc = cpu_to_le32(crc);
- else
- msg->footer.flags |= CEPH_MSG_FOOTER_NOCRC;
- con_out_kvec_reset(con);
- prepare_write_message_footer(con);
-
- return 1; /* must return > 0 to indicate success */
-}
-
-/*
- * write some zeros
- */
-static int write_partial_skip(struct ceph_connection *con)
-{
- int more = MSG_MORE | MSG_SENDPAGE_NOTLAST;
- int ret;
-
- dout("%s %p %d left\n", __func__, con, con->out_skip);
- while (con->out_skip > 0) {
- size_t size = min(con->out_skip, (int) PAGE_SIZE);
-
- if (size == con->out_skip)
- more = MSG_MORE;
- ret = ceph_tcp_sendpage(con->sock, ceph_zero_page, 0, size,
- more);
- if (ret <= 0)
- goto out;
- con->out_skip -= ret;
- }
- ret = 1;
-out:
- return ret;
-}
-
-/*
- * Prepare to read connection handshake, or an ack.
- */
-static void prepare_read_banner(struct ceph_connection *con)
-{
- dout("prepare_read_banner %p\n", con);
- con->in_base_pos = 0;
-}
-
-static void prepare_read_connect(struct ceph_connection *con)
-{
- dout("prepare_read_connect %p\n", con);
- con->in_base_pos = 0;
-}
-
-static void prepare_read_ack(struct ceph_connection *con)
-{
- dout("prepare_read_ack %p\n", con);
- con->in_base_pos = 0;
-}
-
-static void prepare_read_seq(struct ceph_connection *con)
-{
- dout("prepare_read_seq %p\n", con);
- con->in_base_pos = 0;
- con->in_tag = CEPH_MSGR_TAG_SEQ;
-}
-
-static void prepare_read_tag(struct ceph_connection *con)
-{
- dout("prepare_read_tag %p\n", con);
- con->in_base_pos = 0;
- con->in_tag = CEPH_MSGR_TAG_READY;
-}
-
-static void prepare_read_keepalive_ack(struct ceph_connection *con)
-{
- dout("prepare_read_keepalive_ack %p\n", con);
- con->in_base_pos = 0;
-}
-
-/*
- * Prepare to read a message.
- */
-static int prepare_read_message(struct ceph_connection *con)
-{
- dout("prepare_read_message %p\n", con);
- BUG_ON(con->in_msg != NULL);
- con->in_base_pos = 0;
- con->in_front_crc = con->in_middle_crc = con->in_data_crc = 0;
- return 0;
-}
-
-
-static int read_partial(struct ceph_connection *con,
- int end, int size, void *object)
-{
- while (con->in_base_pos < end) {
- int left = end - con->in_base_pos;
- int have = size - left;
- int ret = ceph_tcp_recvmsg(con->sock, object + have, left);
- if (ret <= 0)
- return ret;
- con->in_base_pos += ret;
- }
- return 1;
-}
-
-
-/*
- * Read all or part of the connect-side handshake on a new connection
- */
-static int read_partial_banner(struct ceph_connection *con)
-{
- int size;
- int end;
- int ret;
-
- dout("read_partial_banner %p at %d\n", con, con->in_base_pos);
-
- /* peer's banner */
- size = strlen(CEPH_BANNER);
- end = size;
- ret = read_partial(con, end, size, con->in_banner);
- if (ret <= 0)
- goto out;
-
- size = sizeof (con->actual_peer_addr);
- end += size;
- ret = read_partial(con, end, size, &con->actual_peer_addr);
- if (ret <= 0)
- goto out;
- ceph_decode_banner_addr(&con->actual_peer_addr);
-
- size = sizeof (con->peer_addr_for_me);
- end += size;
- ret = read_partial(con, end, size, &con->peer_addr_for_me);
- if (ret <= 0)
- goto out;
- ceph_decode_banner_addr(&con->peer_addr_for_me);
-
-out:
- return ret;
-}
-
-static int read_partial_connect(struct ceph_connection *con)
-{
- int size;
- int end;
- int ret;
-
- dout("read_partial_connect %p at %d\n", con, con->in_base_pos);
-
- size = sizeof (con->in_reply);
- end = size;
- ret = read_partial(con, end, size, &con->in_reply);
- if (ret <= 0)
- goto out;
-
- if (con->auth) {
- size = le32_to_cpu(con->in_reply.authorizer_len);
- if (size > con->auth->authorizer_reply_buf_len) {
- pr_err("authorizer reply too big: %d > %zu\n", size,
- con->auth->authorizer_reply_buf_len);
- ret = -EINVAL;
- goto out;
- }
-
- end += size;
- ret = read_partial(con, end, size,
- con->auth->authorizer_reply_buf);
- if (ret <= 0)
- goto out;
- }
-
- dout("read_partial_connect %p tag %d, con_seq = %u, g_seq = %u\n",
- con, (int)con->in_reply.tag,
- le32_to_cpu(con->in_reply.connect_seq),
- le32_to_cpu(con->in_reply.global_seq));
-out:
- return ret;
-}
-
-/*
- * Verify the hello banner looks okay.
- */
-static int verify_hello(struct ceph_connection *con)
-{
- if (memcmp(con->in_banner, CEPH_BANNER, strlen(CEPH_BANNER))) {
- pr_err("connect to %s got bad banner\n",
- ceph_pr_addr(&con->peer_addr));
- con->error_msg = "protocol error, bad banner";
- return -1;
- }
- return 0;
-}
bool ceph_addr_is_blank(const struct ceph_entity_addr *addr)
{
return ret;
}
-static int process_banner(struct ceph_connection *con)
-{
- struct ceph_entity_addr *my_addr = &con->msgr->inst.addr;
-
- dout("process_banner on %p\n", con);
-
- if (verify_hello(con) < 0)
- return -1;
-
- /*
- * Make sure the other end is who we wanted. note that the other
- * end may not yet know their ip address, so if it's 0.0.0.0, give
- * them the benefit of the doubt.
- */
- if (memcmp(&con->peer_addr, &con->actual_peer_addr,
- sizeof(con->peer_addr)) != 0 &&
- !(ceph_addr_is_blank(&con->actual_peer_addr) &&
- con->actual_peer_addr.nonce == con->peer_addr.nonce)) {
- pr_warn("wrong peer, want %s/%u, got %s/%u\n",
- ceph_pr_addr(&con->peer_addr),
- le32_to_cpu(con->peer_addr.nonce),
- ceph_pr_addr(&con->actual_peer_addr),
- le32_to_cpu(con->actual_peer_addr.nonce));
- con->error_msg = "wrong peer at address";
- return -1;
- }
-
- /*
- * did we learn our address?
- */
- if (ceph_addr_is_blank(my_addr)) {
- memcpy(&my_addr->in_addr,
- &con->peer_addr_for_me.in_addr,
- sizeof(con->peer_addr_for_me.in_addr));
- ceph_addr_set_port(my_addr, 0);
- ceph_encode_my_addr(con->msgr);
- dout("process_banner learned my addr is %s\n",
- ceph_pr_addr(my_addr));
- }
-
- return 0;
-}
-
-static int process_connect(struct ceph_connection *con)
-{
- u64 sup_feat = from_msgr(con->msgr)->supported_features;
- u64 req_feat = from_msgr(con->msgr)->required_features;
- u64 server_feat = le64_to_cpu(con->in_reply.features);
- int ret;
-
- dout("process_connect on %p tag %d\n", con, (int)con->in_tag);
-
- if (con->auth) {
- int len = le32_to_cpu(con->in_reply.authorizer_len);
-
- /*
- * Any connection that defines ->get_authorizer()
- * should also define ->add_authorizer_challenge() and
- * ->verify_authorizer_reply().
- *
- * See get_connect_authorizer().
- */
- if (con->in_reply.tag == CEPH_MSGR_TAG_CHALLENGE_AUTHORIZER) {
- ret = con->ops->add_authorizer_challenge(
- con, con->auth->authorizer_reply_buf, len);
- if (ret < 0)
- return ret;
-
- con_out_kvec_reset(con);
- __prepare_write_connect(con);
- prepare_read_connect(con);
- return 0;
- }
-
- if (len) {
- ret = con->ops->verify_authorizer_reply(con);
- if (ret < 0) {
- con->error_msg = "bad authorize reply";
- return ret;
- }
- }
- }
-
- switch (con->in_reply.tag) {
- case CEPH_MSGR_TAG_FEATURES:
- pr_err("%s%lld %s feature set mismatch,"
- " my %llx < server's %llx, missing %llx\n",
- ENTITY_NAME(con->peer_name),
- ceph_pr_addr(&con->peer_addr),
- sup_feat, server_feat, server_feat & ~sup_feat);
- con->error_msg = "missing required protocol features";
- return -1;
-
- case CEPH_MSGR_TAG_BADPROTOVER:
- pr_err("%s%lld %s protocol version mismatch,"
- " my %d != server's %d\n",
- ENTITY_NAME(con->peer_name),
- ceph_pr_addr(&con->peer_addr),
- le32_to_cpu(con->out_connect.protocol_version),
- le32_to_cpu(con->in_reply.protocol_version));
- con->error_msg = "protocol version mismatch";
- return -1;
-
- case CEPH_MSGR_TAG_BADAUTHORIZER:
- con->auth_retry++;
- dout("process_connect %p got BADAUTHORIZER attempt %d\n", con,
- con->auth_retry);
- if (con->auth_retry == 2) {
- con->error_msg = "connect authorization failure";
- return -1;
- }
- con_out_kvec_reset(con);
- ret = prepare_write_connect(con);
- if (ret < 0)
- return ret;
- prepare_read_connect(con);
- break;
-
- case CEPH_MSGR_TAG_RESETSESSION:
- /*
- * If we connected with a large connect_seq but the peer
- * has no record of a session with us (no connection, or
- * connect_seq == 0), they will send RESETSESION to indicate
- * that they must have reset their session, and may have
- * dropped messages.
- */
- dout("process_connect got RESET peer seq %u\n",
- le32_to_cpu(con->in_reply.connect_seq));
- pr_info("%s%lld %s session reset\n",
- ENTITY_NAME(con->peer_name),
- ceph_pr_addr(&con->peer_addr));
- ceph_con_reset_session(con);
- con_out_kvec_reset(con);
- ret = prepare_write_connect(con);
- if (ret < 0)
- return ret;
- prepare_read_connect(con);
-
- /* Tell ceph about it. */
- mutex_unlock(&con->mutex);
- if (con->ops->peer_reset)
- con->ops->peer_reset(con);
- mutex_lock(&con->mutex);
- if (con->state != CEPH_CON_S_V1_CONNECT_MSG)
- return -EAGAIN;
- break;
-
- case CEPH_MSGR_TAG_RETRY_SESSION:
- /*
- * If we sent a smaller connect_seq than the peer has, try
- * again with a larger value.
- */
- dout("process_connect got RETRY_SESSION my seq %u, peer %u\n",
- le32_to_cpu(con->out_connect.connect_seq),
- le32_to_cpu(con->in_reply.connect_seq));
- con->connect_seq = le32_to_cpu(con->in_reply.connect_seq);
- con_out_kvec_reset(con);
- ret = prepare_write_connect(con);
- if (ret < 0)
- return ret;
- prepare_read_connect(con);
- break;
-
- case CEPH_MSGR_TAG_RETRY_GLOBAL:
- /*
- * If we sent a smaller global_seq than the peer has, try
- * again with a larger value.
- */
- dout("process_connect got RETRY_GLOBAL my %u peer_gseq %u\n",
- con->peer_global_seq,
- le32_to_cpu(con->in_reply.global_seq));
- ceph_get_global_seq(con->msgr,
- le32_to_cpu(con->in_reply.global_seq));
- con_out_kvec_reset(con);
- ret = prepare_write_connect(con);
- if (ret < 0)
- return ret;
- prepare_read_connect(con);
- break;
-
- case CEPH_MSGR_TAG_SEQ:
- case CEPH_MSGR_TAG_READY:
- if (req_feat & ~server_feat) {
- pr_err("%s%lld %s protocol feature mismatch,"
- " my required %llx > server's %llx, need %llx\n",
- ENTITY_NAME(con->peer_name),
- ceph_pr_addr(&con->peer_addr),
- req_feat, server_feat, req_feat & ~server_feat);
- con->error_msg = "missing required protocol features";
- return -1;
- }
-
- WARN_ON(con->state != CEPH_CON_S_V1_CONNECT_MSG);
- con->state = CEPH_CON_S_OPEN;
- con->auth_retry = 0; /* we authenticated; clear flag */
- con->peer_global_seq = le32_to_cpu(con->in_reply.global_seq);
- con->connect_seq++;
- con->peer_features = server_feat;
- dout("process_connect got READY gseq %d cseq %d (%d)\n",
- con->peer_global_seq,
- le32_to_cpu(con->in_reply.connect_seq),
- con->connect_seq);
- WARN_ON(con->connect_seq !=
- le32_to_cpu(con->in_reply.connect_seq));
-
- if (con->in_reply.flags & CEPH_MSG_CONNECT_LOSSY)
- ceph_con_flag_set(con, CEPH_CON_F_LOSSYTX);
-
- con->delay = 0; /* reset backoff memory */
-
- if (con->in_reply.tag == CEPH_MSGR_TAG_SEQ) {
- prepare_write_seq(con);
- prepare_read_seq(con);
- } else {
- prepare_read_tag(con);
- }
- break;
-
- case CEPH_MSGR_TAG_WAIT:
- /*
- * If there is a connection race (we are opening
- * connections to each other), one of us may just have
- * to WAIT. This shouldn't happen if we are the
- * client.
- */
- con->error_msg = "protocol error, got WAIT as client";
- return -1;
-
- default:
- con->error_msg = "protocol error, garbage tag during connect";
- return -1;
- }
- return 0;
-}
-
-
-/*
- * read (part of) an ack
- */
-static int read_partial_ack(struct ceph_connection *con)
-{
- int size = sizeof (con->in_temp_ack);
- int end = size;
-
- return read_partial(con, end, size, &con->in_temp_ack);
-}
-
-/*
- * We can finally discard anything that's been acked.
- */
-static void process_ack(struct ceph_connection *con)
-{
- u64 ack = le64_to_cpu(con->in_temp_ack);
-
- if (con->in_tag == CEPH_MSGR_TAG_ACK)
- ceph_con_discard_sent(con, ack);
- else
- ceph_con_discard_requeued(con, ack);
-
- prepare_read_tag(con);
-}
-
-
-static int read_partial_message_section(struct ceph_connection *con,
- struct kvec *section,
- unsigned int sec_len, u32 *crc)
-{
- int ret, left;
-
- BUG_ON(!section);
-
- while (section->iov_len < sec_len) {
- BUG_ON(section->iov_base == NULL);
- left = sec_len - section->iov_len;
- ret = ceph_tcp_recvmsg(con->sock, (char *)section->iov_base +
- section->iov_len, left);
- if (ret <= 0)
- return ret;
- section->iov_len += ret;
- }
- if (section->iov_len == sec_len)
- *crc = crc32c(0, section->iov_base, section->iov_len);
-
- return 1;
-}
-
-static int read_partial_msg_data(struct ceph_connection *con)
-{
- struct ceph_msg *msg = con->in_msg;
- struct ceph_msg_data_cursor *cursor = &msg->cursor;
- bool do_datacrc = !ceph_test_opt(from_msgr(con->msgr), NOCRC);
- struct page *page;
- size_t page_offset;
- size_t length;
- u32 crc = 0;
- int ret;
-
- if (!msg->num_data_items)
- return -EIO;
-
- if (do_datacrc)
- crc = con->in_data_crc;
- while (cursor->total_resid) {
- if (!cursor->resid) {
- ceph_msg_data_advance(cursor, 0);
- continue;
- }
-
- page = ceph_msg_data_next(cursor, &page_offset, &length, NULL);
- ret = ceph_tcp_recvpage(con->sock, page, page_offset, length);
- if (ret <= 0) {
- if (do_datacrc)
- con->in_data_crc = crc;
-
- return ret;
- }
-
- if (do_datacrc)
- crc = ceph_crc32c_page(crc, page, page_offset, ret);
- ceph_msg_data_advance(cursor, (size_t)ret);
- }
- if (do_datacrc)
- con->in_data_crc = crc;
-
- return 1; /* must return > 0 to indicate success */
-}
-
-/*
- * read (part of) a message.
- */
-static int read_partial_message(struct ceph_connection *con)
-{
- struct ceph_msg *m = con->in_msg;
- int size;
- int end;
- int ret;
- unsigned int front_len, middle_len, data_len;
- bool do_datacrc = !ceph_test_opt(from_msgr(con->msgr), NOCRC);
- bool need_sign = (con->peer_features & CEPH_FEATURE_MSG_AUTH);
- u64 seq;
- u32 crc;
-
- dout("read_partial_message con %p msg %p\n", con, m);
-
- /* header */
- size = sizeof (con->in_hdr);
- end = size;
- ret = read_partial(con, end, size, &con->in_hdr);
- if (ret <= 0)
- return ret;
-
- crc = crc32c(0, &con->in_hdr, offsetof(struct ceph_msg_header, crc));
- if (cpu_to_le32(crc) != con->in_hdr.crc) {
- pr_err("read_partial_message bad hdr crc %u != expected %u\n",
- crc, con->in_hdr.crc);
- return -EBADMSG;
- }
-
- front_len = le32_to_cpu(con->in_hdr.front_len);
- if (front_len > CEPH_MSG_MAX_FRONT_LEN)
- return -EIO;
- middle_len = le32_to_cpu(con->in_hdr.middle_len);
- if (middle_len > CEPH_MSG_MAX_MIDDLE_LEN)
- return -EIO;
- data_len = le32_to_cpu(con->in_hdr.data_len);
- if (data_len > CEPH_MSG_MAX_DATA_LEN)
- return -EIO;
-
- /* verify seq# */
- seq = le64_to_cpu(con->in_hdr.seq);
- if ((s64)seq - (s64)con->in_seq < 1) {
- pr_info("skipping %s%lld %s seq %lld expected %lld\n",
- ENTITY_NAME(con->peer_name),
- ceph_pr_addr(&con->peer_addr),
- seq, con->in_seq + 1);
- con->in_base_pos = -front_len - middle_len - data_len -
- sizeof_footer(con);
- con->in_tag = CEPH_MSGR_TAG_READY;
- return 1;
- } else if ((s64)seq - (s64)con->in_seq > 1) {
- pr_err("read_partial_message bad seq %lld expected %lld\n",
- seq, con->in_seq + 1);
- con->error_msg = "bad message sequence # for incoming message";
- return -EBADE;
- }
-
- /* allocate message? */
- if (!con->in_msg) {
- int skip = 0;
-
- dout("got hdr type %d front %d data %d\n", con->in_hdr.type,
- front_len, data_len);
- ret = ceph_con_in_msg_alloc(con, &con->in_hdr, &skip);
- if (ret < 0)
- return ret;
-
- BUG_ON(!con->in_msg ^ skip);
- if (skip) {
- /* skip this message */
- dout("alloc_msg said skip message\n");
- con->in_base_pos = -front_len - middle_len - data_len -
- sizeof_footer(con);
- con->in_tag = CEPH_MSGR_TAG_READY;
- con->in_seq++;
- return 1;
- }
-
- BUG_ON(!con->in_msg);
- BUG_ON(con->in_msg->con != con);
- m = con->in_msg;
- m->front.iov_len = 0; /* haven't read it yet */
- if (m->middle)
- m->middle->vec.iov_len = 0;
-
- /* prepare for data payload, if any */
-
- if (data_len)
- prepare_message_data(con->in_msg, data_len);
- }
-
- /* front */
- ret = read_partial_message_section(con, &m->front, front_len,
- &con->in_front_crc);
- if (ret <= 0)
- return ret;
-
- /* middle */
- if (m->middle) {
- ret = read_partial_message_section(con, &m->middle->vec,
- middle_len,
- &con->in_middle_crc);
- if (ret <= 0)
- return ret;
- }
-
- /* (page) data */
- if (data_len) {
- ret = read_partial_msg_data(con);
- if (ret <= 0)
- return ret;
- }
-
- /* footer */
- size = sizeof_footer(con);
- end += size;
- ret = read_partial(con, end, size, &m->footer);
- if (ret <= 0)
- return ret;
-
- if (!need_sign) {
- m->footer.flags = m->old_footer.flags;
- m->footer.sig = 0;
- }
-
- dout("read_partial_message got msg %p %d (%u) + %d (%u) + %d (%u)\n",
- m, front_len, m->footer.front_crc, middle_len,
- m->footer.middle_crc, data_len, m->footer.data_crc);
-
- /* crc ok? */
- if (con->in_front_crc != le32_to_cpu(m->footer.front_crc)) {
- pr_err("read_partial_message %p front crc %u != exp. %u\n",
- m, con->in_front_crc, m->footer.front_crc);
- return -EBADMSG;
- }
- if (con->in_middle_crc != le32_to_cpu(m->footer.middle_crc)) {
- pr_err("read_partial_message %p middle crc %u != exp %u\n",
- m, con->in_middle_crc, m->footer.middle_crc);
- return -EBADMSG;
- }
- if (do_datacrc &&
- (m->footer.flags & CEPH_MSG_FOOTER_NOCRC) == 0 &&
- con->in_data_crc != le32_to_cpu(m->footer.data_crc)) {
- pr_err("read_partial_message %p data crc %u != exp. %u\n", m,
- con->in_data_crc, le32_to_cpu(m->footer.data_crc));
- return -EBADMSG;
- }
-
- if (need_sign && con->ops->check_message_signature &&
- con->ops->check_message_signature(m)) {
- pr_err("read_partial_message %p signature check failed\n", m);
- return -EBADMSG;
- }
-
- return 1; /* done! */
-}
-
/*
* Process message. This happens in the worker thread. The callback should
* be careful not to do anything that waits on other incoming messages or it
mutex_lock(&con->mutex);
}
-static int read_keepalive_ack(struct ceph_connection *con)
-{
- struct ceph_timespec ceph_ts;
- size_t size = sizeof(ceph_ts);
- int ret = read_partial(con, size, size, &ceph_ts);
- if (ret <= 0)
- return ret;
- ceph_decode_timespec64(&con->last_keepalive_ack, &ceph_ts);
- prepare_read_tag(con);
- return 1;
-}
-
-/*
- * Write something to the socket. Called in a worker thread when the
- * socket appears to be writeable and we have something ready to send.
- */
-int ceph_con_v1_try_write(struct ceph_connection *con)
-{
- int ret = 1;
-
- dout("try_write start %p state %d\n", con, con->state);
- if (con->state != CEPH_CON_S_PREOPEN &&
- con->state != CEPH_CON_S_V1_BANNER &&
- con->state != CEPH_CON_S_V1_CONNECT_MSG &&
- con->state != CEPH_CON_S_OPEN)
- return 0;
-
- /* open the socket first? */
- if (con->state == CEPH_CON_S_PREOPEN) {
- BUG_ON(con->sock);
- con->state = CEPH_CON_S_V1_BANNER;
-
- con_out_kvec_reset(con);
- prepare_write_banner(con);
- prepare_read_banner(con);
-
- BUG_ON(con->in_msg);
- con->in_tag = CEPH_MSGR_TAG_READY;
- dout("try_write initiating connect on %p new state %d\n",
- con, con->state);
- ret = ceph_tcp_connect(con);
- if (ret < 0) {
- con->error_msg = "connect error";
- goto out;
- }
- }
-
-more:
- dout("try_write out_kvec_bytes %d\n", con->out_kvec_bytes);
- BUG_ON(!con->sock);
-
- /* kvec data queued? */
- if (con->out_kvec_left) {
- ret = write_partial_kvec(con);
- if (ret <= 0)
- goto out;
- }
- if (con->out_skip) {
- ret = write_partial_skip(con);
- if (ret <= 0)
- goto out;
- }
-
- /* msg pages? */
- if (con->out_msg) {
- if (con->out_msg_done) {
- ceph_msg_put(con->out_msg);
- con->out_msg = NULL; /* we're done with this one */
- goto do_next;
- }
-
- ret = write_partial_message_data(con);
- if (ret == 1)
- goto more; /* we need to send the footer, too! */
- if (ret == 0)
- goto out;
- if (ret < 0) {
- dout("try_write write_partial_message_data err %d\n",
- ret);
- goto out;
- }
- }
-
-do_next:
- if (con->state == CEPH_CON_S_OPEN) {
- if (ceph_con_flag_test_and_clear(con,
- CEPH_CON_F_KEEPALIVE_PENDING)) {
- prepare_write_keepalive(con);
- goto more;
- }
- /* is anything else pending? */
- if (!list_empty(&con->out_queue)) {
- prepare_write_message(con);
- goto more;
- }
- if (con->in_seq > con->in_seq_acked) {
- prepare_write_ack(con);
- goto more;
- }
- }
-
- /* Nothing to do! */
- ceph_con_flag_clear(con, CEPH_CON_F_WRITE_PENDING);
- dout("try_write nothing else to write.\n");
- ret = 0;
-out:
- dout("try_write done on %p ret %d\n", con, ret);
- return ret;
-}
-
-/*
- * Read what we can from the socket.
- */
-int ceph_con_v1_try_read(struct ceph_connection *con)
-{
- int ret = -1;
-
-more:
- dout("try_read start %p state %d\n", con, con->state);
- if (con->state != CEPH_CON_S_V1_BANNER &&
- con->state != CEPH_CON_S_V1_CONNECT_MSG &&
- con->state != CEPH_CON_S_OPEN)
- return 0;
-
- BUG_ON(!con->sock);
-
- dout("try_read tag %d in_base_pos %d\n", (int)con->in_tag,
- con->in_base_pos);
-
- if (con->state == CEPH_CON_S_V1_BANNER) {
- ret = read_partial_banner(con);
- if (ret <= 0)
- goto out;
- ret = process_banner(con);
- if (ret < 0)
- goto out;
-
- con->state = CEPH_CON_S_V1_CONNECT_MSG;
-
- /*
- * Received banner is good, exchange connection info.
- * Do not reset out_kvec, as sending our banner raced
- * with receiving peer banner after connect completed.
- */
- ret = prepare_write_connect(con);
- if (ret < 0)
- goto out;
- prepare_read_connect(con);
-
- /* Send connection info before awaiting response */
- goto out;
- }
-
- if (con->state == CEPH_CON_S_V1_CONNECT_MSG) {
- ret = read_partial_connect(con);
- if (ret <= 0)
- goto out;
- ret = process_connect(con);
- if (ret < 0)
- goto out;
- goto more;
- }
-
- WARN_ON(con->state != CEPH_CON_S_OPEN);
-
- if (con->in_base_pos < 0) {
- /*
- * skipping + discarding content.
- */
- ret = ceph_tcp_recvmsg(con->sock, NULL, -con->in_base_pos);
- if (ret <= 0)
- goto out;
- dout("skipped %d / %d bytes\n", ret, -con->in_base_pos);
- con->in_base_pos += ret;
- if (con->in_base_pos)
- goto more;
- }
- if (con->in_tag == CEPH_MSGR_TAG_READY) {
- /*
- * what's next?
- */
- ret = ceph_tcp_recvmsg(con->sock, &con->in_tag, 1);
- if (ret <= 0)
- goto out;
- dout("try_read got tag %d\n", (int)con->in_tag);
- switch (con->in_tag) {
- case CEPH_MSGR_TAG_MSG:
- prepare_read_message(con);
- break;
- case CEPH_MSGR_TAG_ACK:
- prepare_read_ack(con);
- break;
- case CEPH_MSGR_TAG_KEEPALIVE2_ACK:
- prepare_read_keepalive_ack(con);
- break;
- case CEPH_MSGR_TAG_CLOSE:
- ceph_con_close_socket(con);
- con->state = CEPH_CON_S_CLOSED;
- goto out;
- default:
- goto bad_tag;
- }
- }
- if (con->in_tag == CEPH_MSGR_TAG_MSG) {
- ret = read_partial_message(con);
- if (ret <= 0) {
- switch (ret) {
- case -EBADMSG:
- con->error_msg = "bad crc/signature";
- fallthrough;
- case -EBADE:
- ret = -EIO;
- break;
- case -EIO:
- con->error_msg = "io error";
- break;
- }
- goto out;
- }
- if (con->in_tag == CEPH_MSGR_TAG_READY)
- goto more;
- ceph_con_process_message(con);
- if (con->state == CEPH_CON_S_OPEN)
- prepare_read_tag(con);
- goto more;
- }
- if (con->in_tag == CEPH_MSGR_TAG_ACK ||
- con->in_tag == CEPH_MSGR_TAG_SEQ) {
- /*
- * the final handshake seq exchange is semantically
- * equivalent to an ACK
- */
- ret = read_partial_ack(con);
- if (ret <= 0)
- goto out;
- process_ack(con);
- goto more;
- }
- if (con->in_tag == CEPH_MSGR_TAG_KEEPALIVE2_ACK) {
- ret = read_keepalive_ack(con);
- if (ret <= 0)
- goto out;
- goto more;
- }
-
-out:
- dout("try_read done on %p ret %d\n", con, ret);
- return ret;
-
-bad_tag:
- pr_err("try_read bad con->in_tag = %d\n", (int)con->in_tag);
- con->error_msg = "protocol error, garbage tag";
- ret = -1;
- goto out;
-}
-
-
/*
* Atomically queue work on a connection after the specified delay.
* Bump @con reference to avoid races with connection teardown.
}
}
-
void ceph_messenger_reset_nonce(struct ceph_messenger *msgr)
{
u32 nonce = le32_to_cpu(msgr->inst.addr.nonce) + 1000000;
}
EXPORT_SYMBOL(ceph_con_send);
-void ceph_con_v1_revoke(struct ceph_connection *con)
-{
- struct ceph_msg *msg = con->out_msg;
-
- WARN_ON(con->out_skip);
- /* footer */
- if (con->out_msg_done) {
- con->out_skip += con_out_kvec_skip(con);
- } else {
- WARN_ON(!msg->data_length);
- con->out_skip += sizeof_footer(con);
- }
- /* data, middle, front */
- if (msg->data_length)
- con->out_skip += msg->cursor.total_resid;
- if (msg->middle)
- con->out_skip += con_out_kvec_skip(con);
- con->out_skip += con_out_kvec_skip(con);
-
- dout("%s con %p out_kvec_bytes %d out_skip %d\n", __func__, con,
- con->out_kvec_bytes, con->out_skip);
-}
-
/*
* Revoke a message that was previously queued for send
*/
mutex_unlock(&con->mutex);
}
-void ceph_con_v1_revoke_incoming(struct ceph_connection *con)
-{
- unsigned int front_len = le32_to_cpu(con->in_hdr.front_len);
- unsigned int middle_len = le32_to_cpu(con->in_hdr.middle_len);
- unsigned int data_len = le32_to_cpu(con->in_hdr.data_len);
-
- /* skip rest of message */
- con->in_base_pos = con->in_base_pos -
- sizeof(struct ceph_msg_header) -
- front_len -
- middle_len -
- data_len -
- sizeof(struct ceph_msg_footer);
-
- con->in_tag = CEPH_MSGR_TAG_READY;
- con->in_seq++;
-
- dout("%s con %p in_base_pos %d\n", __func__, con, con->in_base_pos);
-}
-
/*
* Revoke a message that we may be reading data into
*/
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/ceph/ceph_debug.h>
+
+#include <linux/bvec.h>
+#include <linux/crc32c.h>
+#include <linux/net.h>
+#include <linux/socket.h>
+#include <net/sock.h>
+
+#include <linux/ceph/ceph_features.h>
+#include <linux/ceph/decode.h>
+#include <linux/ceph/libceph.h>
+#include <linux/ceph/messenger.h>
+
+/* static tag bytes (protocol control messages) */
+static char tag_msg = CEPH_MSGR_TAG_MSG;
+static char tag_ack = CEPH_MSGR_TAG_ACK;
+static char tag_keepalive = CEPH_MSGR_TAG_KEEPALIVE;
+static char tag_keepalive2 = CEPH_MSGR_TAG_KEEPALIVE2;
+
+/*
+ * If @buf is NULL, discard up to @len bytes.
+ */
+static int ceph_tcp_recvmsg(struct socket *sock, void *buf, size_t len)
+{
+ struct kvec iov = {buf, len};
+ struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL };
+ int r;
+
+ if (!buf)
+ msg.msg_flags |= MSG_TRUNC;
+
+ iov_iter_kvec(&msg.msg_iter, READ, &iov, 1, len);
+ r = sock_recvmsg(sock, &msg, msg.msg_flags);
+ if (r == -EAGAIN)
+ r = 0;
+ return r;
+}
+
+static int ceph_tcp_recvpage(struct socket *sock, struct page *page,
+ int page_offset, size_t length)
+{
+ struct bio_vec bvec = {
+ .bv_page = page,
+ .bv_offset = page_offset,
+ .bv_len = length
+ };
+ struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL };
+ int r;
+
+ BUG_ON(page_offset + length > PAGE_SIZE);
+ iov_iter_bvec(&msg.msg_iter, READ, &bvec, 1, length);
+ r = sock_recvmsg(sock, &msg, msg.msg_flags);
+ if (r == -EAGAIN)
+ r = 0;
+ return r;
+}
+
+/*
+ * write something. @more is true if caller will be sending more data
+ * shortly.
+ */
+static int ceph_tcp_sendmsg(struct socket *sock, struct kvec *iov,
+ size_t kvlen, size_t len, bool more)
+{
+ struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL };
+ int r;
+
+ if (more)
+ msg.msg_flags |= MSG_MORE;
+ else
+ msg.msg_flags |= MSG_EOR; /* superfluous, but what the hell */
+
+ r = kernel_sendmsg(sock, &msg, iov, kvlen, len);
+ if (r == -EAGAIN)
+ r = 0;
+ return r;
+}
+
+/*
+ * @more: either or both of MSG_MORE and MSG_SENDPAGE_NOTLAST
+ */
+static int ceph_tcp_sendpage(struct socket *sock, struct page *page,
+ int offset, size_t size, int more)
+{
+ ssize_t (*sendpage)(struct socket *sock, struct page *page,
+ int offset, size_t size, int flags);
+ int flags = MSG_DONTWAIT | MSG_NOSIGNAL | more;
+ int ret;
+
+ /*
+ * sendpage cannot properly handle pages with page_count == 0,
+ * we need to fall back to sendmsg if that's the case.
+ *
+ * Same goes for slab pages: skb_can_coalesce() allows
+ * coalescing neighboring slab objects into a single frag which
+ * triggers one of hardened usercopy checks.
+ */
+ if (sendpage_ok(page))
+ sendpage = sock->ops->sendpage;
+ else
+ sendpage = sock_no_sendpage;
+
+ ret = sendpage(sock, page, offset, size, flags);
+ if (ret == -EAGAIN)
+ ret = 0;
+
+ return ret;
+}
+
+static void con_out_kvec_reset(struct ceph_connection *con)
+{
+ BUG_ON(con->out_skip);
+
+ con->out_kvec_left = 0;
+ con->out_kvec_bytes = 0;
+ con->out_kvec_cur = &con->out_kvec[0];
+}
+
+static void con_out_kvec_add(struct ceph_connection *con,
+ size_t size, void *data)
+{
+ int index = con->out_kvec_left;
+
+ BUG_ON(con->out_skip);
+ BUG_ON(index >= ARRAY_SIZE(con->out_kvec));
+
+ con->out_kvec[index].iov_len = size;
+ con->out_kvec[index].iov_base = data;
+ con->out_kvec_left++;
+ con->out_kvec_bytes += size;
+}
+
+/*
+ * Chop off a kvec from the end. Return residual number of bytes for
+ * that kvec, i.e. how many bytes would have been written if the kvec
+ * hadn't been nuked.
+ */
+static int con_out_kvec_skip(struct ceph_connection *con)
+{
+ int off = con->out_kvec_cur - con->out_kvec;
+ int skip = 0;
+
+ if (con->out_kvec_bytes > 0) {
+ skip = con->out_kvec[off + con->out_kvec_left - 1].iov_len;
+ BUG_ON(con->out_kvec_bytes < skip);
+ BUG_ON(!con->out_kvec_left);
+ con->out_kvec_bytes -= skip;
+ con->out_kvec_left--;
+ }
+
+ return skip;
+}
+
+static size_t sizeof_footer(struct ceph_connection *con)
+{
+ return (con->peer_features & CEPH_FEATURE_MSG_AUTH) ?
+ sizeof(struct ceph_msg_footer) :
+ sizeof(struct ceph_msg_footer_old);
+}
+
+static void prepare_message_data(struct ceph_msg *msg, u32 data_len)
+{
+ /* Initialize data cursor */
+
+ ceph_msg_data_cursor_init(&msg->cursor, msg, data_len);
+}
+
+/*
+ * Prepare footer for currently outgoing message, and finish things
+ * off. Assumes out_kvec* are already valid.. we just add on to the end.
+ */
+static void prepare_write_message_footer(struct ceph_connection *con)
+{
+ struct ceph_msg *m = con->out_msg;
+
+ m->footer.flags |= CEPH_MSG_FOOTER_COMPLETE;
+
+ dout("prepare_write_message_footer %p\n", con);
+ con_out_kvec_add(con, sizeof_footer(con), &m->footer);
+ if (con->peer_features & CEPH_FEATURE_MSG_AUTH) {
+ if (con->ops->sign_message)
+ con->ops->sign_message(m);
+ else
+ m->footer.sig = 0;
+ } else {
+ m->old_footer.flags = m->footer.flags;
+ }
+ con->out_more = m->more_to_follow;
+ con->out_msg_done = true;
+}
+
+/*
+ * Prepare headers for the next outgoing message.
+ */
+static void prepare_write_message(struct ceph_connection *con)
+{
+ struct ceph_msg *m;
+ u32 crc;
+
+ con_out_kvec_reset(con);
+ con->out_msg_done = false;
+
+ /* Sneak an ack in there first? If we can get it into the same
+ * TCP packet that's a good thing. */
+ if (con->in_seq > con->in_seq_acked) {
+ con->in_seq_acked = con->in_seq;
+ con_out_kvec_add(con, sizeof (tag_ack), &tag_ack);
+ con->out_temp_ack = cpu_to_le64(con->in_seq_acked);
+ con_out_kvec_add(con, sizeof (con->out_temp_ack),
+ &con->out_temp_ack);
+ }
+
+ ceph_con_get_out_msg(con);
+ m = con->out_msg;
+
+ dout("prepare_write_message %p seq %lld type %d len %d+%d+%zd\n",
+ m, con->out_seq, le16_to_cpu(m->hdr.type),
+ le32_to_cpu(m->hdr.front_len), le32_to_cpu(m->hdr.middle_len),
+ m->data_length);
+ WARN_ON(m->front.iov_len != le32_to_cpu(m->hdr.front_len));
+ WARN_ON(m->data_length != le32_to_cpu(m->hdr.data_len));
+
+ /* tag + hdr + front + middle */
+ con_out_kvec_add(con, sizeof (tag_msg), &tag_msg);
+ con_out_kvec_add(con, sizeof(con->out_hdr), &con->out_hdr);
+ con_out_kvec_add(con, m->front.iov_len, m->front.iov_base);
+
+ if (m->middle)
+ con_out_kvec_add(con, m->middle->vec.iov_len,
+ m->middle->vec.iov_base);
+
+ /* fill in hdr crc and finalize hdr */
+ crc = crc32c(0, &m->hdr, offsetof(struct ceph_msg_header, crc));
+ con->out_msg->hdr.crc = cpu_to_le32(crc);
+ memcpy(&con->out_hdr, &con->out_msg->hdr, sizeof(con->out_hdr));
+
+ /* fill in front and middle crc, footer */
+ crc = crc32c(0, m->front.iov_base, m->front.iov_len);
+ con->out_msg->footer.front_crc = cpu_to_le32(crc);
+ if (m->middle) {
+ crc = crc32c(0, m->middle->vec.iov_base,
+ m->middle->vec.iov_len);
+ con->out_msg->footer.middle_crc = cpu_to_le32(crc);
+ } else
+ con->out_msg->footer.middle_crc = 0;
+ dout("%s front_crc %u middle_crc %u\n", __func__,
+ le32_to_cpu(con->out_msg->footer.front_crc),
+ le32_to_cpu(con->out_msg->footer.middle_crc));
+ con->out_msg->footer.flags = 0;
+
+ /* is there a data payload? */
+ con->out_msg->footer.data_crc = 0;
+ if (m->data_length) {
+ prepare_message_data(con->out_msg, m->data_length);
+ con->out_more = 1; /* data + footer will follow */
+ } else {
+ /* no, queue up footer too and be done */
+ prepare_write_message_footer(con);
+ }
+
+ ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING);
+}
+
+/*
+ * Prepare an ack.
+ */
+static void prepare_write_ack(struct ceph_connection *con)
+{
+ dout("prepare_write_ack %p %llu -> %llu\n", con,
+ con->in_seq_acked, con->in_seq);
+ con->in_seq_acked = con->in_seq;
+
+ con_out_kvec_reset(con);
+
+ con_out_kvec_add(con, sizeof (tag_ack), &tag_ack);
+
+ con->out_temp_ack = cpu_to_le64(con->in_seq_acked);
+ con_out_kvec_add(con, sizeof (con->out_temp_ack),
+ &con->out_temp_ack);
+
+ con->out_more = 1; /* more will follow.. eventually.. */
+ ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING);
+}
+
+/*
+ * Prepare to share the seq during handshake
+ */
+static void prepare_write_seq(struct ceph_connection *con)
+{
+ dout("prepare_write_seq %p %llu -> %llu\n", con,
+ con->in_seq_acked, con->in_seq);
+ con->in_seq_acked = con->in_seq;
+
+ con_out_kvec_reset(con);
+
+ con->out_temp_ack = cpu_to_le64(con->in_seq_acked);
+ con_out_kvec_add(con, sizeof (con->out_temp_ack),
+ &con->out_temp_ack);
+
+ ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING);
+}
+
+/*
+ * Prepare to write keepalive byte.
+ */
+static void prepare_write_keepalive(struct ceph_connection *con)
+{
+ dout("prepare_write_keepalive %p\n", con);
+ con_out_kvec_reset(con);
+ if (con->peer_features & CEPH_FEATURE_MSGR_KEEPALIVE2) {
+ struct timespec64 now;
+
+ ktime_get_real_ts64(&now);
+ con_out_kvec_add(con, sizeof(tag_keepalive2), &tag_keepalive2);
+ ceph_encode_timespec64(&con->out_temp_keepalive2, &now);
+ con_out_kvec_add(con, sizeof(con->out_temp_keepalive2),
+ &con->out_temp_keepalive2);
+ } else {
+ con_out_kvec_add(con, sizeof(tag_keepalive), &tag_keepalive);
+ }
+ ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING);
+}
+
+/*
+ * Connection negotiation.
+ */
+
+static int get_connect_authorizer(struct ceph_connection *con)
+{
+ struct ceph_auth_handshake *auth;
+ int auth_proto;
+
+ if (!con->ops->get_authorizer) {
+ con->auth = NULL;
+ con->out_connect.authorizer_protocol = CEPH_AUTH_UNKNOWN;
+ con->out_connect.authorizer_len = 0;
+ return 0;
+ }
+
+ auth = con->ops->get_authorizer(con, &auth_proto, con->auth_retry);
+ if (IS_ERR(auth))
+ return PTR_ERR(auth);
+
+ con->auth = auth;
+ con->out_connect.authorizer_protocol = cpu_to_le32(auth_proto);
+ con->out_connect.authorizer_len = cpu_to_le32(auth->authorizer_buf_len);
+ return 0;
+}
+
+/*
+ * We connected to a peer and are saying hello.
+ */
+static void prepare_write_banner(struct ceph_connection *con)
+{
+ con_out_kvec_add(con, strlen(CEPH_BANNER), CEPH_BANNER);
+ con_out_kvec_add(con, sizeof (con->msgr->my_enc_addr),
+ &con->msgr->my_enc_addr);
+
+ con->out_more = 0;
+ ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING);
+}
+
+static void __prepare_write_connect(struct ceph_connection *con)
+{
+ con_out_kvec_add(con, sizeof(con->out_connect), &con->out_connect);
+ if (con->auth)
+ con_out_kvec_add(con, con->auth->authorizer_buf_len,
+ con->auth->authorizer_buf);
+
+ con->out_more = 0;
+ ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING);
+}
+
+static int prepare_write_connect(struct ceph_connection *con)
+{
+ unsigned int global_seq = ceph_get_global_seq(con->msgr, 0);
+ int proto;
+ int ret;
+
+ switch (con->peer_name.type) {
+ case CEPH_ENTITY_TYPE_MON:
+ proto = CEPH_MONC_PROTOCOL;
+ break;
+ case CEPH_ENTITY_TYPE_OSD:
+ proto = CEPH_OSDC_PROTOCOL;
+ break;
+ case CEPH_ENTITY_TYPE_MDS:
+ proto = CEPH_MDSC_PROTOCOL;
+ break;
+ default:
+ BUG();
+ }
+
+ dout("prepare_write_connect %p cseq=%d gseq=%d proto=%d\n", con,
+ con->connect_seq, global_seq, proto);
+
+ con->out_connect.features =
+ cpu_to_le64(from_msgr(con->msgr)->supported_features);
+ con->out_connect.host_type = cpu_to_le32(CEPH_ENTITY_TYPE_CLIENT);
+ con->out_connect.connect_seq = cpu_to_le32(con->connect_seq);
+ con->out_connect.global_seq = cpu_to_le32(global_seq);
+ con->out_connect.protocol_version = cpu_to_le32(proto);
+ con->out_connect.flags = 0;
+
+ ret = get_connect_authorizer(con);
+ if (ret)
+ return ret;
+
+ __prepare_write_connect(con);
+ return 0;
+}
+
+/*
+ * write as much of pending kvecs to the socket as we can.
+ * 1 -> done
+ * 0 -> socket full, but more to do
+ * <0 -> error
+ */
+static int write_partial_kvec(struct ceph_connection *con)
+{
+ int ret;
+
+ dout("write_partial_kvec %p %d left\n", con, con->out_kvec_bytes);
+ while (con->out_kvec_bytes > 0) {
+ ret = ceph_tcp_sendmsg(con->sock, con->out_kvec_cur,
+ con->out_kvec_left, con->out_kvec_bytes,
+ con->out_more);
+ if (ret <= 0)
+ goto out;
+ con->out_kvec_bytes -= ret;
+ if (con->out_kvec_bytes == 0)
+ break; /* done */
+
+ /* account for full iov entries consumed */
+ while (ret >= con->out_kvec_cur->iov_len) {
+ BUG_ON(!con->out_kvec_left);
+ ret -= con->out_kvec_cur->iov_len;
+ con->out_kvec_cur++;
+ con->out_kvec_left--;
+ }
+ /* and for a partially-consumed entry */
+ if (ret) {
+ con->out_kvec_cur->iov_len -= ret;
+ con->out_kvec_cur->iov_base += ret;
+ }
+ }
+ con->out_kvec_left = 0;
+ ret = 1;
+out:
+ dout("write_partial_kvec %p %d left in %d kvecs ret = %d\n", con,
+ con->out_kvec_bytes, con->out_kvec_left, ret);
+ return ret; /* done! */
+}
+
+/*
+ * Write as much message data payload as we can. If we finish, queue
+ * up the footer.
+ * 1 -> done, footer is now queued in out_kvec[].
+ * 0 -> socket full, but more to do
+ * <0 -> error
+ */
+static int write_partial_message_data(struct ceph_connection *con)
+{
+ struct ceph_msg *msg = con->out_msg;
+ struct ceph_msg_data_cursor *cursor = &msg->cursor;
+ bool do_datacrc = !ceph_test_opt(from_msgr(con->msgr), NOCRC);
+ int more = MSG_MORE | MSG_SENDPAGE_NOTLAST;
+ u32 crc;
+
+ dout("%s %p msg %p\n", __func__, con, msg);
+
+ if (!msg->num_data_items)
+ return -EINVAL;
+
+ /*
+ * Iterate through each page that contains data to be
+ * written, and send as much as possible for each.
+ *
+ * If we are calculating the data crc (the default), we will
+ * need to map the page. If we have no pages, they have
+ * been revoked, so use the zero page.
+ */
+ crc = do_datacrc ? le32_to_cpu(msg->footer.data_crc) : 0;
+ while (cursor->total_resid) {
+ struct page *page;
+ size_t page_offset;
+ size_t length;
+ int ret;
+
+ if (!cursor->resid) {
+ ceph_msg_data_advance(cursor, 0);
+ continue;
+ }
+
+ page = ceph_msg_data_next(cursor, &page_offset, &length, NULL);
+ if (length == cursor->total_resid)
+ more = MSG_MORE;
+ ret = ceph_tcp_sendpage(con->sock, page, page_offset, length,
+ more);
+ if (ret <= 0) {
+ if (do_datacrc)
+ msg->footer.data_crc = cpu_to_le32(crc);
+
+ return ret;
+ }
+ if (do_datacrc && cursor->need_crc)
+ crc = ceph_crc32c_page(crc, page, page_offset, length);
+ ceph_msg_data_advance(cursor, (size_t)ret);
+ }
+
+ dout("%s %p msg %p done\n", __func__, con, msg);
+
+ /* prepare and queue up footer, too */
+ if (do_datacrc)
+ msg->footer.data_crc = cpu_to_le32(crc);
+ else
+ msg->footer.flags |= CEPH_MSG_FOOTER_NOCRC;
+ con_out_kvec_reset(con);
+ prepare_write_message_footer(con);
+
+ return 1; /* must return > 0 to indicate success */
+}
+
+/*
+ * write some zeros
+ */
+static int write_partial_skip(struct ceph_connection *con)
+{
+ int more = MSG_MORE | MSG_SENDPAGE_NOTLAST;
+ int ret;
+
+ dout("%s %p %d left\n", __func__, con, con->out_skip);
+ while (con->out_skip > 0) {
+ size_t size = min(con->out_skip, (int) PAGE_SIZE);
+
+ if (size == con->out_skip)
+ more = MSG_MORE;
+ ret = ceph_tcp_sendpage(con->sock, ceph_zero_page, 0, size,
+ more);
+ if (ret <= 0)
+ goto out;
+ con->out_skip -= ret;
+ }
+ ret = 1;
+out:
+ return ret;
+}
+
+/*
+ * Prepare to read connection handshake, or an ack.
+ */
+static void prepare_read_banner(struct ceph_connection *con)
+{
+ dout("prepare_read_banner %p\n", con);
+ con->in_base_pos = 0;
+}
+
+static void prepare_read_connect(struct ceph_connection *con)
+{
+ dout("prepare_read_connect %p\n", con);
+ con->in_base_pos = 0;
+}
+
+static void prepare_read_ack(struct ceph_connection *con)
+{
+ dout("prepare_read_ack %p\n", con);
+ con->in_base_pos = 0;
+}
+
+static void prepare_read_seq(struct ceph_connection *con)
+{
+ dout("prepare_read_seq %p\n", con);
+ con->in_base_pos = 0;
+ con->in_tag = CEPH_MSGR_TAG_SEQ;
+}
+
+static void prepare_read_tag(struct ceph_connection *con)
+{
+ dout("prepare_read_tag %p\n", con);
+ con->in_base_pos = 0;
+ con->in_tag = CEPH_MSGR_TAG_READY;
+}
+
+static void prepare_read_keepalive_ack(struct ceph_connection *con)
+{
+ dout("prepare_read_keepalive_ack %p\n", con);
+ con->in_base_pos = 0;
+}
+
+/*
+ * Prepare to read a message.
+ */
+static int prepare_read_message(struct ceph_connection *con)
+{
+ dout("prepare_read_message %p\n", con);
+ BUG_ON(con->in_msg != NULL);
+ con->in_base_pos = 0;
+ con->in_front_crc = con->in_middle_crc = con->in_data_crc = 0;
+ return 0;
+}
+
+static int read_partial(struct ceph_connection *con,
+ int end, int size, void *object)
+{
+ while (con->in_base_pos < end) {
+ int left = end - con->in_base_pos;
+ int have = size - left;
+ int ret = ceph_tcp_recvmsg(con->sock, object + have, left);
+ if (ret <= 0)
+ return ret;
+ con->in_base_pos += ret;
+ }
+ return 1;
+}
+
+/*
+ * Read all or part of the connect-side handshake on a new connection
+ */
+static int read_partial_banner(struct ceph_connection *con)
+{
+ int size;
+ int end;
+ int ret;
+
+ dout("read_partial_banner %p at %d\n", con, con->in_base_pos);
+
+ /* peer's banner */
+ size = strlen(CEPH_BANNER);
+ end = size;
+ ret = read_partial(con, end, size, con->in_banner);
+ if (ret <= 0)
+ goto out;
+
+ size = sizeof (con->actual_peer_addr);
+ end += size;
+ ret = read_partial(con, end, size, &con->actual_peer_addr);
+ if (ret <= 0)
+ goto out;
+ ceph_decode_banner_addr(&con->actual_peer_addr);
+
+ size = sizeof (con->peer_addr_for_me);
+ end += size;
+ ret = read_partial(con, end, size, &con->peer_addr_for_me);
+ if (ret <= 0)
+ goto out;
+ ceph_decode_banner_addr(&con->peer_addr_for_me);
+
+out:
+ return ret;
+}
+
+static int read_partial_connect(struct ceph_connection *con)
+{
+ int size;
+ int end;
+ int ret;
+
+ dout("read_partial_connect %p at %d\n", con, con->in_base_pos);
+
+ size = sizeof (con->in_reply);
+ end = size;
+ ret = read_partial(con, end, size, &con->in_reply);
+ if (ret <= 0)
+ goto out;
+
+ if (con->auth) {
+ size = le32_to_cpu(con->in_reply.authorizer_len);
+ if (size > con->auth->authorizer_reply_buf_len) {
+ pr_err("authorizer reply too big: %d > %zu\n", size,
+ con->auth->authorizer_reply_buf_len);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ end += size;
+ ret = read_partial(con, end, size,
+ con->auth->authorizer_reply_buf);
+ if (ret <= 0)
+ goto out;
+ }
+
+ dout("read_partial_connect %p tag %d, con_seq = %u, g_seq = %u\n",
+ con, (int)con->in_reply.tag,
+ le32_to_cpu(con->in_reply.connect_seq),
+ le32_to_cpu(con->in_reply.global_seq));
+out:
+ return ret;
+}
+
+/*
+ * Verify the hello banner looks okay.
+ */
+static int verify_hello(struct ceph_connection *con)
+{
+ if (memcmp(con->in_banner, CEPH_BANNER, strlen(CEPH_BANNER))) {
+ pr_err("connect to %s got bad banner\n",
+ ceph_pr_addr(&con->peer_addr));
+ con->error_msg = "protocol error, bad banner";
+ return -1;
+ }
+ return 0;
+}
+
+static int process_banner(struct ceph_connection *con)
+{
+ struct ceph_entity_addr *my_addr = &con->msgr->inst.addr;
+
+ dout("process_banner on %p\n", con);
+
+ if (verify_hello(con) < 0)
+ return -1;
+
+ /*
+ * Make sure the other end is who we wanted. note that the other
+ * end may not yet know their ip address, so if it's 0.0.0.0, give
+ * them the benefit of the doubt.
+ */
+ if (memcmp(&con->peer_addr, &con->actual_peer_addr,
+ sizeof(con->peer_addr)) != 0 &&
+ !(ceph_addr_is_blank(&con->actual_peer_addr) &&
+ con->actual_peer_addr.nonce == con->peer_addr.nonce)) {
+ pr_warn("wrong peer, want %s/%u, got %s/%u\n",
+ ceph_pr_addr(&con->peer_addr),
+ le32_to_cpu(con->peer_addr.nonce),
+ ceph_pr_addr(&con->actual_peer_addr),
+ le32_to_cpu(con->actual_peer_addr.nonce));
+ con->error_msg = "wrong peer at address";
+ return -1;
+ }
+
+ /*
+ * did we learn our address?
+ */
+ if (ceph_addr_is_blank(my_addr)) {
+ memcpy(&my_addr->in_addr,
+ &con->peer_addr_for_me.in_addr,
+ sizeof(con->peer_addr_for_me.in_addr));
+ ceph_addr_set_port(my_addr, 0);
+ ceph_encode_my_addr(con->msgr);
+ dout("process_banner learned my addr is %s\n",
+ ceph_pr_addr(my_addr));
+ }
+
+ return 0;
+}
+
+static int process_connect(struct ceph_connection *con)
+{
+ u64 sup_feat = from_msgr(con->msgr)->supported_features;
+ u64 req_feat = from_msgr(con->msgr)->required_features;
+ u64 server_feat = le64_to_cpu(con->in_reply.features);
+ int ret;
+
+ dout("process_connect on %p tag %d\n", con, (int)con->in_tag);
+
+ if (con->auth) {
+ int len = le32_to_cpu(con->in_reply.authorizer_len);
+
+ /*
+ * Any connection that defines ->get_authorizer()
+ * should also define ->add_authorizer_challenge() and
+ * ->verify_authorizer_reply().
+ *
+ * See get_connect_authorizer().
+ */
+ if (con->in_reply.tag == CEPH_MSGR_TAG_CHALLENGE_AUTHORIZER) {
+ ret = con->ops->add_authorizer_challenge(
+ con, con->auth->authorizer_reply_buf, len);
+ if (ret < 0)
+ return ret;
+
+ con_out_kvec_reset(con);
+ __prepare_write_connect(con);
+ prepare_read_connect(con);
+ return 0;
+ }
+
+ if (len) {
+ ret = con->ops->verify_authorizer_reply(con);
+ if (ret < 0) {
+ con->error_msg = "bad authorize reply";
+ return ret;
+ }
+ }
+ }
+
+ switch (con->in_reply.tag) {
+ case CEPH_MSGR_TAG_FEATURES:
+ pr_err("%s%lld %s feature set mismatch,"
+ " my %llx < server's %llx, missing %llx\n",
+ ENTITY_NAME(con->peer_name),
+ ceph_pr_addr(&con->peer_addr),
+ sup_feat, server_feat, server_feat & ~sup_feat);
+ con->error_msg = "missing required protocol features";
+ return -1;
+
+ case CEPH_MSGR_TAG_BADPROTOVER:
+ pr_err("%s%lld %s protocol version mismatch,"
+ " my %d != server's %d\n",
+ ENTITY_NAME(con->peer_name),
+ ceph_pr_addr(&con->peer_addr),
+ le32_to_cpu(con->out_connect.protocol_version),
+ le32_to_cpu(con->in_reply.protocol_version));
+ con->error_msg = "protocol version mismatch";
+ return -1;
+
+ case CEPH_MSGR_TAG_BADAUTHORIZER:
+ con->auth_retry++;
+ dout("process_connect %p got BADAUTHORIZER attempt %d\n", con,
+ con->auth_retry);
+ if (con->auth_retry == 2) {
+ con->error_msg = "connect authorization failure";
+ return -1;
+ }
+ con_out_kvec_reset(con);
+ ret = prepare_write_connect(con);
+ if (ret < 0)
+ return ret;
+ prepare_read_connect(con);
+ break;
+
+ case CEPH_MSGR_TAG_RESETSESSION:
+ /*
+ * If we connected with a large connect_seq but the peer
+ * has no record of a session with us (no connection, or
+ * connect_seq == 0), they will send RESETSESION to indicate
+ * that they must have reset their session, and may have
+ * dropped messages.
+ */
+ dout("process_connect got RESET peer seq %u\n",
+ le32_to_cpu(con->in_reply.connect_seq));
+ pr_info("%s%lld %s session reset\n",
+ ENTITY_NAME(con->peer_name),
+ ceph_pr_addr(&con->peer_addr));
+ ceph_con_reset_session(con);
+ con_out_kvec_reset(con);
+ ret = prepare_write_connect(con);
+ if (ret < 0)
+ return ret;
+ prepare_read_connect(con);
+
+ /* Tell ceph about it. */
+ mutex_unlock(&con->mutex);
+ if (con->ops->peer_reset)
+ con->ops->peer_reset(con);
+ mutex_lock(&con->mutex);
+ if (con->state != CEPH_CON_S_V1_CONNECT_MSG)
+ return -EAGAIN;
+ break;
+
+ case CEPH_MSGR_TAG_RETRY_SESSION:
+ /*
+ * If we sent a smaller connect_seq than the peer has, try
+ * again with a larger value.
+ */
+ dout("process_connect got RETRY_SESSION my seq %u, peer %u\n",
+ le32_to_cpu(con->out_connect.connect_seq),
+ le32_to_cpu(con->in_reply.connect_seq));
+ con->connect_seq = le32_to_cpu(con->in_reply.connect_seq);
+ con_out_kvec_reset(con);
+ ret = prepare_write_connect(con);
+ if (ret < 0)
+ return ret;
+ prepare_read_connect(con);
+ break;
+
+ case CEPH_MSGR_TAG_RETRY_GLOBAL:
+ /*
+ * If we sent a smaller global_seq than the peer has, try
+ * again with a larger value.
+ */
+ dout("process_connect got RETRY_GLOBAL my %u peer_gseq %u\n",
+ con->peer_global_seq,
+ le32_to_cpu(con->in_reply.global_seq));
+ ceph_get_global_seq(con->msgr,
+ le32_to_cpu(con->in_reply.global_seq));
+ con_out_kvec_reset(con);
+ ret = prepare_write_connect(con);
+ if (ret < 0)
+ return ret;
+ prepare_read_connect(con);
+ break;
+
+ case CEPH_MSGR_TAG_SEQ:
+ case CEPH_MSGR_TAG_READY:
+ if (req_feat & ~server_feat) {
+ pr_err("%s%lld %s protocol feature mismatch,"
+ " my required %llx > server's %llx, need %llx\n",
+ ENTITY_NAME(con->peer_name),
+ ceph_pr_addr(&con->peer_addr),
+ req_feat, server_feat, req_feat & ~server_feat);
+ con->error_msg = "missing required protocol features";
+ return -1;
+ }
+
+ WARN_ON(con->state != CEPH_CON_S_V1_CONNECT_MSG);
+ con->state = CEPH_CON_S_OPEN;
+ con->auth_retry = 0; /* we authenticated; clear flag */
+ con->peer_global_seq = le32_to_cpu(con->in_reply.global_seq);
+ con->connect_seq++;
+ con->peer_features = server_feat;
+ dout("process_connect got READY gseq %d cseq %d (%d)\n",
+ con->peer_global_seq,
+ le32_to_cpu(con->in_reply.connect_seq),
+ con->connect_seq);
+ WARN_ON(con->connect_seq !=
+ le32_to_cpu(con->in_reply.connect_seq));
+
+ if (con->in_reply.flags & CEPH_MSG_CONNECT_LOSSY)
+ ceph_con_flag_set(con, CEPH_CON_F_LOSSYTX);
+
+ con->delay = 0; /* reset backoff memory */
+
+ if (con->in_reply.tag == CEPH_MSGR_TAG_SEQ) {
+ prepare_write_seq(con);
+ prepare_read_seq(con);
+ } else {
+ prepare_read_tag(con);
+ }
+ break;
+
+ case CEPH_MSGR_TAG_WAIT:
+ /*
+ * If there is a connection race (we are opening
+ * connections to each other), one of us may just have
+ * to WAIT. This shouldn't happen if we are the
+ * client.
+ */
+ con->error_msg = "protocol error, got WAIT as client";
+ return -1;
+
+ default:
+ con->error_msg = "protocol error, garbage tag during connect";
+ return -1;
+ }
+ return 0;
+}
+
+/*
+ * read (part of) an ack
+ */
+static int read_partial_ack(struct ceph_connection *con)
+{
+ int size = sizeof (con->in_temp_ack);
+ int end = size;
+
+ return read_partial(con, end, size, &con->in_temp_ack);
+}
+
+/*
+ * We can finally discard anything that's been acked.
+ */
+static void process_ack(struct ceph_connection *con)
+{
+ u64 ack = le64_to_cpu(con->in_temp_ack);
+
+ if (con->in_tag == CEPH_MSGR_TAG_ACK)
+ ceph_con_discard_sent(con, ack);
+ else
+ ceph_con_discard_requeued(con, ack);
+
+ prepare_read_tag(con);
+}
+
+static int read_partial_message_section(struct ceph_connection *con,
+ struct kvec *section,
+ unsigned int sec_len, u32 *crc)
+{
+ int ret, left;
+
+ BUG_ON(!section);
+
+ while (section->iov_len < sec_len) {
+ BUG_ON(section->iov_base == NULL);
+ left = sec_len - section->iov_len;
+ ret = ceph_tcp_recvmsg(con->sock, (char *)section->iov_base +
+ section->iov_len, left);
+ if (ret <= 0)
+ return ret;
+ section->iov_len += ret;
+ }
+ if (section->iov_len == sec_len)
+ *crc = crc32c(0, section->iov_base, section->iov_len);
+
+ return 1;
+}
+
+static int read_partial_msg_data(struct ceph_connection *con)
+{
+ struct ceph_msg *msg = con->in_msg;
+ struct ceph_msg_data_cursor *cursor = &msg->cursor;
+ bool do_datacrc = !ceph_test_opt(from_msgr(con->msgr), NOCRC);
+ struct page *page;
+ size_t page_offset;
+ size_t length;
+ u32 crc = 0;
+ int ret;
+
+ if (!msg->num_data_items)
+ return -EIO;
+
+ if (do_datacrc)
+ crc = con->in_data_crc;
+ while (cursor->total_resid) {
+ if (!cursor->resid) {
+ ceph_msg_data_advance(cursor, 0);
+ continue;
+ }
+
+ page = ceph_msg_data_next(cursor, &page_offset, &length, NULL);
+ ret = ceph_tcp_recvpage(con->sock, page, page_offset, length);
+ if (ret <= 0) {
+ if (do_datacrc)
+ con->in_data_crc = crc;
+
+ return ret;
+ }
+
+ if (do_datacrc)
+ crc = ceph_crc32c_page(crc, page, page_offset, ret);
+ ceph_msg_data_advance(cursor, (size_t)ret);
+ }
+ if (do_datacrc)
+ con->in_data_crc = crc;
+
+ return 1; /* must return > 0 to indicate success */
+}
+
+/*
+ * read (part of) a message.
+ */
+static int read_partial_message(struct ceph_connection *con)
+{
+ struct ceph_msg *m = con->in_msg;
+ int size;
+ int end;
+ int ret;
+ unsigned int front_len, middle_len, data_len;
+ bool do_datacrc = !ceph_test_opt(from_msgr(con->msgr), NOCRC);
+ bool need_sign = (con->peer_features & CEPH_FEATURE_MSG_AUTH);
+ u64 seq;
+ u32 crc;
+
+ dout("read_partial_message con %p msg %p\n", con, m);
+
+ /* header */
+ size = sizeof (con->in_hdr);
+ end = size;
+ ret = read_partial(con, end, size, &con->in_hdr);
+ if (ret <= 0)
+ return ret;
+
+ crc = crc32c(0, &con->in_hdr, offsetof(struct ceph_msg_header, crc));
+ if (cpu_to_le32(crc) != con->in_hdr.crc) {
+ pr_err("read_partial_message bad hdr crc %u != expected %u\n",
+ crc, con->in_hdr.crc);
+ return -EBADMSG;
+ }
+
+ front_len = le32_to_cpu(con->in_hdr.front_len);
+ if (front_len > CEPH_MSG_MAX_FRONT_LEN)
+ return -EIO;
+ middle_len = le32_to_cpu(con->in_hdr.middle_len);
+ if (middle_len > CEPH_MSG_MAX_MIDDLE_LEN)
+ return -EIO;
+ data_len = le32_to_cpu(con->in_hdr.data_len);
+ if (data_len > CEPH_MSG_MAX_DATA_LEN)
+ return -EIO;
+
+ /* verify seq# */
+ seq = le64_to_cpu(con->in_hdr.seq);
+ if ((s64)seq - (s64)con->in_seq < 1) {
+ pr_info("skipping %s%lld %s seq %lld expected %lld\n",
+ ENTITY_NAME(con->peer_name),
+ ceph_pr_addr(&con->peer_addr),
+ seq, con->in_seq + 1);
+ con->in_base_pos = -front_len - middle_len - data_len -
+ sizeof_footer(con);
+ con->in_tag = CEPH_MSGR_TAG_READY;
+ return 1;
+ } else if ((s64)seq - (s64)con->in_seq > 1) {
+ pr_err("read_partial_message bad seq %lld expected %lld\n",
+ seq, con->in_seq + 1);
+ con->error_msg = "bad message sequence # for incoming message";
+ return -EBADE;
+ }
+
+ /* allocate message? */
+ if (!con->in_msg) {
+ int skip = 0;
+
+ dout("got hdr type %d front %d data %d\n", con->in_hdr.type,
+ front_len, data_len);
+ ret = ceph_con_in_msg_alloc(con, &con->in_hdr, &skip);
+ if (ret < 0)
+ return ret;
+
+ BUG_ON(!con->in_msg ^ skip);
+ if (skip) {
+ /* skip this message */
+ dout("alloc_msg said skip message\n");
+ con->in_base_pos = -front_len - middle_len - data_len -
+ sizeof_footer(con);
+ con->in_tag = CEPH_MSGR_TAG_READY;
+ con->in_seq++;
+ return 1;
+ }
+
+ BUG_ON(!con->in_msg);
+ BUG_ON(con->in_msg->con != con);
+ m = con->in_msg;
+ m->front.iov_len = 0; /* haven't read it yet */
+ if (m->middle)
+ m->middle->vec.iov_len = 0;
+
+ /* prepare for data payload, if any */
+
+ if (data_len)
+ prepare_message_data(con->in_msg, data_len);
+ }
+
+ /* front */
+ ret = read_partial_message_section(con, &m->front, front_len,
+ &con->in_front_crc);
+ if (ret <= 0)
+ return ret;
+
+ /* middle */
+ if (m->middle) {
+ ret = read_partial_message_section(con, &m->middle->vec,
+ middle_len,
+ &con->in_middle_crc);
+ if (ret <= 0)
+ return ret;
+ }
+
+ /* (page) data */
+ if (data_len) {
+ ret = read_partial_msg_data(con);
+ if (ret <= 0)
+ return ret;
+ }
+
+ /* footer */
+ size = sizeof_footer(con);
+ end += size;
+ ret = read_partial(con, end, size, &m->footer);
+ if (ret <= 0)
+ return ret;
+
+ if (!need_sign) {
+ m->footer.flags = m->old_footer.flags;
+ m->footer.sig = 0;
+ }
+
+ dout("read_partial_message got msg %p %d (%u) + %d (%u) + %d (%u)\n",
+ m, front_len, m->footer.front_crc, middle_len,
+ m->footer.middle_crc, data_len, m->footer.data_crc);
+
+ /* crc ok? */
+ if (con->in_front_crc != le32_to_cpu(m->footer.front_crc)) {
+ pr_err("read_partial_message %p front crc %u != exp. %u\n",
+ m, con->in_front_crc, m->footer.front_crc);
+ return -EBADMSG;
+ }
+ if (con->in_middle_crc != le32_to_cpu(m->footer.middle_crc)) {
+ pr_err("read_partial_message %p middle crc %u != exp %u\n",
+ m, con->in_middle_crc, m->footer.middle_crc);
+ return -EBADMSG;
+ }
+ if (do_datacrc &&
+ (m->footer.flags & CEPH_MSG_FOOTER_NOCRC) == 0 &&
+ con->in_data_crc != le32_to_cpu(m->footer.data_crc)) {
+ pr_err("read_partial_message %p data crc %u != exp. %u\n", m,
+ con->in_data_crc, le32_to_cpu(m->footer.data_crc));
+ return -EBADMSG;
+ }
+
+ if (need_sign && con->ops->check_message_signature &&
+ con->ops->check_message_signature(m)) {
+ pr_err("read_partial_message %p signature check failed\n", m);
+ return -EBADMSG;
+ }
+
+ return 1; /* done! */
+}
+
+static int read_keepalive_ack(struct ceph_connection *con)
+{
+ struct ceph_timespec ceph_ts;
+ size_t size = sizeof(ceph_ts);
+ int ret = read_partial(con, size, size, &ceph_ts);
+ if (ret <= 0)
+ return ret;
+ ceph_decode_timespec64(&con->last_keepalive_ack, &ceph_ts);
+ prepare_read_tag(con);
+ return 1;
+}
+
+/*
+ * Read what we can from the socket.
+ */
+int ceph_con_v1_try_read(struct ceph_connection *con)
+{
+ int ret = -1;
+
+more:
+ dout("try_read start %p state %d\n", con, con->state);
+ if (con->state != CEPH_CON_S_V1_BANNER &&
+ con->state != CEPH_CON_S_V1_CONNECT_MSG &&
+ con->state != CEPH_CON_S_OPEN)
+ return 0;
+
+ BUG_ON(!con->sock);
+
+ dout("try_read tag %d in_base_pos %d\n", (int)con->in_tag,
+ con->in_base_pos);
+
+ if (con->state == CEPH_CON_S_V1_BANNER) {
+ ret = read_partial_banner(con);
+ if (ret <= 0)
+ goto out;
+ ret = process_banner(con);
+ if (ret < 0)
+ goto out;
+
+ con->state = CEPH_CON_S_V1_CONNECT_MSG;
+
+ /*
+ * Received banner is good, exchange connection info.
+ * Do not reset out_kvec, as sending our banner raced
+ * with receiving peer banner after connect completed.
+ */
+ ret = prepare_write_connect(con);
+ if (ret < 0)
+ goto out;
+ prepare_read_connect(con);
+
+ /* Send connection info before awaiting response */
+ goto out;
+ }
+
+ if (con->state == CEPH_CON_S_V1_CONNECT_MSG) {
+ ret = read_partial_connect(con);
+ if (ret <= 0)
+ goto out;
+ ret = process_connect(con);
+ if (ret < 0)
+ goto out;
+ goto more;
+ }
+
+ WARN_ON(con->state != CEPH_CON_S_OPEN);
+
+ if (con->in_base_pos < 0) {
+ /*
+ * skipping + discarding content.
+ */
+ ret = ceph_tcp_recvmsg(con->sock, NULL, -con->in_base_pos);
+ if (ret <= 0)
+ goto out;
+ dout("skipped %d / %d bytes\n", ret, -con->in_base_pos);
+ con->in_base_pos += ret;
+ if (con->in_base_pos)
+ goto more;
+ }
+ if (con->in_tag == CEPH_MSGR_TAG_READY) {
+ /*
+ * what's next?
+ */
+ ret = ceph_tcp_recvmsg(con->sock, &con->in_tag, 1);
+ if (ret <= 0)
+ goto out;
+ dout("try_read got tag %d\n", (int)con->in_tag);
+ switch (con->in_tag) {
+ case CEPH_MSGR_TAG_MSG:
+ prepare_read_message(con);
+ break;
+ case CEPH_MSGR_TAG_ACK:
+ prepare_read_ack(con);
+ break;
+ case CEPH_MSGR_TAG_KEEPALIVE2_ACK:
+ prepare_read_keepalive_ack(con);
+ break;
+ case CEPH_MSGR_TAG_CLOSE:
+ ceph_con_close_socket(con);
+ con->state = CEPH_CON_S_CLOSED;
+ goto out;
+ default:
+ goto bad_tag;
+ }
+ }
+ if (con->in_tag == CEPH_MSGR_TAG_MSG) {
+ ret = read_partial_message(con);
+ if (ret <= 0) {
+ switch (ret) {
+ case -EBADMSG:
+ con->error_msg = "bad crc/signature";
+ fallthrough;
+ case -EBADE:
+ ret = -EIO;
+ break;
+ case -EIO:
+ con->error_msg = "io error";
+ break;
+ }
+ goto out;
+ }
+ if (con->in_tag == CEPH_MSGR_TAG_READY)
+ goto more;
+ ceph_con_process_message(con);
+ if (con->state == CEPH_CON_S_OPEN)
+ prepare_read_tag(con);
+ goto more;
+ }
+ if (con->in_tag == CEPH_MSGR_TAG_ACK ||
+ con->in_tag == CEPH_MSGR_TAG_SEQ) {
+ /*
+ * the final handshake seq exchange is semantically
+ * equivalent to an ACK
+ */
+ ret = read_partial_ack(con);
+ if (ret <= 0)
+ goto out;
+ process_ack(con);
+ goto more;
+ }
+ if (con->in_tag == CEPH_MSGR_TAG_KEEPALIVE2_ACK) {
+ ret = read_keepalive_ack(con);
+ if (ret <= 0)
+ goto out;
+ goto more;
+ }
+
+out:
+ dout("try_read done on %p ret %d\n", con, ret);
+ return ret;
+
+bad_tag:
+ pr_err("try_read bad con->in_tag = %d\n", (int)con->in_tag);
+ con->error_msg = "protocol error, garbage tag";
+ ret = -1;
+ goto out;
+}
+
+/*
+ * Write something to the socket. Called in a worker thread when the
+ * socket appears to be writeable and we have something ready to send.
+ */
+int ceph_con_v1_try_write(struct ceph_connection *con)
+{
+ int ret = 1;
+
+ dout("try_write start %p state %d\n", con, con->state);
+ if (con->state != CEPH_CON_S_PREOPEN &&
+ con->state != CEPH_CON_S_V1_BANNER &&
+ con->state != CEPH_CON_S_V1_CONNECT_MSG &&
+ con->state != CEPH_CON_S_OPEN)
+ return 0;
+
+ /* open the socket first? */
+ if (con->state == CEPH_CON_S_PREOPEN) {
+ BUG_ON(con->sock);
+ con->state = CEPH_CON_S_V1_BANNER;
+
+ con_out_kvec_reset(con);
+ prepare_write_banner(con);
+ prepare_read_banner(con);
+
+ BUG_ON(con->in_msg);
+ con->in_tag = CEPH_MSGR_TAG_READY;
+ dout("try_write initiating connect on %p new state %d\n",
+ con, con->state);
+ ret = ceph_tcp_connect(con);
+ if (ret < 0) {
+ con->error_msg = "connect error";
+ goto out;
+ }
+ }
+
+more:
+ dout("try_write out_kvec_bytes %d\n", con->out_kvec_bytes);
+ BUG_ON(!con->sock);
+
+ /* kvec data queued? */
+ if (con->out_kvec_left) {
+ ret = write_partial_kvec(con);
+ if (ret <= 0)
+ goto out;
+ }
+ if (con->out_skip) {
+ ret = write_partial_skip(con);
+ if (ret <= 0)
+ goto out;
+ }
+
+ /* msg pages? */
+ if (con->out_msg) {
+ if (con->out_msg_done) {
+ ceph_msg_put(con->out_msg);
+ con->out_msg = NULL; /* we're done with this one */
+ goto do_next;
+ }
+
+ ret = write_partial_message_data(con);
+ if (ret == 1)
+ goto more; /* we need to send the footer, too! */
+ if (ret == 0)
+ goto out;
+ if (ret < 0) {
+ dout("try_write write_partial_message_data err %d\n",
+ ret);
+ goto out;
+ }
+ }
+
+do_next:
+ if (con->state == CEPH_CON_S_OPEN) {
+ if (ceph_con_flag_test_and_clear(con,
+ CEPH_CON_F_KEEPALIVE_PENDING)) {
+ prepare_write_keepalive(con);
+ goto more;
+ }
+ /* is anything else pending? */
+ if (!list_empty(&con->out_queue)) {
+ prepare_write_message(con);
+ goto more;
+ }
+ if (con->in_seq > con->in_seq_acked) {
+ prepare_write_ack(con);
+ goto more;
+ }
+ }
+
+ /* Nothing to do! */
+ ceph_con_flag_clear(con, CEPH_CON_F_WRITE_PENDING);
+ dout("try_write nothing else to write.\n");
+ ret = 0;
+out:
+ dout("try_write done on %p ret %d\n", con, ret);
+ return ret;
+}
+
+void ceph_con_v1_revoke(struct ceph_connection *con)
+{
+ struct ceph_msg *msg = con->out_msg;
+
+ WARN_ON(con->out_skip);
+ /* footer */
+ if (con->out_msg_done) {
+ con->out_skip += con_out_kvec_skip(con);
+ } else {
+ WARN_ON(!msg->data_length);
+ con->out_skip += sizeof_footer(con);
+ }
+ /* data, middle, front */
+ if (msg->data_length)
+ con->out_skip += msg->cursor.total_resid;
+ if (msg->middle)
+ con->out_skip += con_out_kvec_skip(con);
+ con->out_skip += con_out_kvec_skip(con);
+
+ dout("%s con %p out_kvec_bytes %d out_skip %d\n", __func__, con,
+ con->out_kvec_bytes, con->out_skip);
+}
+
+void ceph_con_v1_revoke_incoming(struct ceph_connection *con)
+{
+ unsigned int front_len = le32_to_cpu(con->in_hdr.front_len);
+ unsigned int middle_len = le32_to_cpu(con->in_hdr.middle_len);
+ unsigned int data_len = le32_to_cpu(con->in_hdr.data_len);
+
+ /* skip rest of message */
+ con->in_base_pos = con->in_base_pos -
+ sizeof(struct ceph_msg_header) -
+ front_len -
+ middle_len -
+ data_len -
+ sizeof(struct ceph_msg_footer);
+
+ con->in_tag = CEPH_MSGR_TAG_READY;
+ con->in_seq++;
+
+ dout("%s con %p in_base_pos %d\n", __func__, con, con->in_base_pos);
+}
+
+bool ceph_con_v1_opened(struct ceph_connection *con)
+{
+ return con->connect_seq;
+}
+
+void ceph_con_v1_reset_session(struct ceph_connection *con)
+{
+ con->connect_seq = 0;
+ con->peer_global_seq = 0;
+}
+
+void ceph_con_v1_reset_protocol(struct ceph_connection *con)
+{
+ con->out_skip = 0;
+}
projects / linux-2.6-microblaze.git / commitdiff