*******************************************************************************
**
** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
-** Copyright (C) 2005 Red Hat, Inc. All rights reserved.
+** Copyright (C) 2005-2008 Red Hat, Inc. All rights reserved.
**
** This copyrighted material is made available to anyone wishing to use,
** modify, copy, or redistribute it subject to the terms and conditions
static void make_config(struct dlm_ls *ls, struct rcom_config *rf)
{
- rf->rf_lvblen = ls->ls_lvblen;
- rf->rf_lsflags = ls->ls_exflags;
+ rf->rf_lvblen = cpu_to_le32(ls->ls_lvblen);
+ rf->rf_lsflags = cpu_to_le32(ls->ls_exflags);
}
static int check_config(struct dlm_ls *ls, struct dlm_rcom *rc, int nodeid)
{
struct rcom_config *rf = (struct rcom_config *) rc->rc_buf;
+ size_t conf_size = sizeof(struct dlm_rcom) + sizeof(struct rcom_config);
if ((rc->rc_header.h_version & 0xFFFF0000) != DLM_HEADER_MAJOR) {
log_error(ls, "version mismatch: %x nodeid %d: %x",
return -EPROTO;
}
- if (rf->rf_lvblen != ls->ls_lvblen ||
- rf->rf_lsflags != ls->ls_exflags) {
+ if (rc->rc_header.h_length < conf_size) {
+ log_error(ls, "config too short: %d nodeid %d",
+ rc->rc_header.h_length, nodeid);
+ return -EPROTO;
+ }
+
+ if (le32_to_cpu(rf->rf_lvblen) != ls->ls_lvblen ||
+ le32_to_cpu(rf->rf_lsflags) != ls->ls_exflags) {
log_error(ls, "config mismatch: %d,%x nodeid %d: %d,%x",
- ls->ls_lvblen, ls->ls_exflags,
- nodeid, rf->rf_lvblen, rf->rf_lsflags);
+ ls->ls_lvblen, ls->ls_exflags, nodeid,
+ le32_to_cpu(rf->rf_lvblen),
+ le32_to_cpu(rf->rf_lsflags));
return -EPROTO;
}
return 0;
ls->ls_recover_nodeid = nodeid;
if (nodeid == dlm_our_nodeid()) {
- rc = (struct dlm_rcom *) ls->ls_recover_buf;
+ rc = ls->ls_recover_buf;
rc->rc_result = dlm_recover_status(ls);
goto out;
}
if (error)
goto out;
- rc = (struct dlm_rcom *) ls->ls_recover_buf;
+ rc = ls->ls_recover_buf;
if (rc->rc_result == -ESRCH) {
/* we pretend the remote lockspace exists with 0 status */
spin_unlock(&ls->ls_rcom_spin);
}
-static void receive_rcom_status_reply(struct dlm_ls *ls, struct dlm_rcom *rc_in)
-{
- receive_sync_reply(ls, rc_in);
-}
-
int dlm_rcom_names(struct dlm_ls *ls, int nodeid, char *last_name, int last_len)
{
struct dlm_rcom *rc;
struct dlm_mhandle *mh;
- int error = 0, len = sizeof(struct dlm_rcom);
+ int error = 0;
+ int max_size = dlm_config.ci_buffer_size - sizeof(struct dlm_rcom);
ls->ls_recover_nodeid = nodeid;
if (nodeid == dlm_our_nodeid()) {
+ ls->ls_recover_buf->rc_header.h_length =
+ dlm_config.ci_buffer_size;
dlm_copy_master_names(ls, last_name, last_len,
- ls->ls_recover_buf + len,
- dlm_config.ci_buffer_size - len, nodeid);
+ ls->ls_recover_buf->rc_buf,
+ max_size, nodeid);
goto out;
}
send_rcom(ls, mh, rc);
}
-static void receive_rcom_names_reply(struct dlm_ls *ls, struct dlm_rcom *rc_in)
-{
- receive_sync_reply(ls, rc_in);
-}
-
int dlm_send_rcom_lookup(struct dlm_rsb *r, int dir_nodeid)
{
struct dlm_rcom *rc;
{
memset(rl, 0, sizeof(*rl));
- rl->rl_ownpid = lkb->lkb_ownpid;
- rl->rl_lkid = lkb->lkb_id;
- rl->rl_exflags = lkb->lkb_exflags;
- rl->rl_flags = lkb->lkb_flags;
- rl->rl_lvbseq = lkb->lkb_lvbseq;
+ rl->rl_ownpid = cpu_to_le32(lkb->lkb_ownpid);
+ rl->rl_lkid = cpu_to_le32(lkb->lkb_id);
+ rl->rl_exflags = cpu_to_le32(lkb->lkb_exflags);
+ rl->rl_flags = cpu_to_le32(lkb->lkb_flags);
+ rl->rl_lvbseq = cpu_to_le32(lkb->lkb_lvbseq);
rl->rl_rqmode = lkb->lkb_rqmode;
rl->rl_grmode = lkb->lkb_grmode;
rl->rl_status = lkb->lkb_status;
- rl->rl_wait_type = lkb->lkb_wait_type;
+ rl->rl_wait_type = cpu_to_le16(lkb->lkb_wait_type);
- if (lkb->lkb_bastaddr)
+ if (lkb->lkb_bastfn)
rl->rl_asts |= AST_BAST;
- if (lkb->lkb_astaddr)
+ if (lkb->lkb_astfn)
rl->rl_asts |= AST_COMP;
- rl->rl_namelen = r->res_length;
+ rl->rl_namelen = cpu_to_le16(r->res_length);
memcpy(rl->rl_name, r->res_name, r->res_length);
/* FIXME: might we have an lvb without DLM_LKF_VALBLK set ?
return error;
}
+/* needs at least dlm_rcom + rcom_lock */
static void receive_rcom_lock(struct dlm_ls *ls, struct dlm_rcom *rc_in)
{
struct dlm_rcom *rc;
send_rcom(ls, mh, rc);
}
-static void receive_rcom_lock_reply(struct dlm_ls *ls, struct dlm_rcom *rc_in)
-{
- dlm_recover_process_copy(ls, rc_in);
-}
+/* If the lockspace doesn't exist then still send a status message
+ back; it's possible that it just doesn't have its global_id yet. */
-static int send_ls_not_ready(int nodeid, struct dlm_rcom *rc_in)
+int dlm_send_ls_not_ready(int nodeid, struct dlm_rcom *rc_in)
{
struct dlm_rcom *rc;
struct rcom_config *rf;
rc->rc_result = -ESRCH;
rf = (struct rcom_config *) rc->rc_buf;
- rf->rf_lvblen = -1;
+ rf->rf_lvblen = cpu_to_le32(~0U);
dlm_rcom_out(rc);
dlm_lowcomms_commit_buffer(mh);
return rv;
}
-/* Called by dlm_recvd; corresponds to dlm_receive_message() but special
+/* Called by dlm_recv; corresponds to dlm_receive_message() but special
recovery-only comms are sent through here. */
-void dlm_receive_rcom(struct dlm_header *hd, int nodeid)
+void dlm_receive_rcom(struct dlm_ls *ls, struct dlm_rcom *rc, int nodeid)
{
- struct dlm_rcom *rc = (struct dlm_rcom *) hd;
- struct dlm_ls *ls;
-
- dlm_rcom_in(rc);
-
- /* If the lockspace doesn't exist then still send a status message
- back; it's possible that it just doesn't have its global_id yet. */
-
- ls = dlm_find_lockspace_global(hd->h_lockspace);
- if (!ls) {
- log_print("lockspace %x from %d type %x not found",
- hd->h_lockspace, nodeid, rc->rc_type);
- if (rc->rc_type == DLM_RCOM_STATUS)
- send_ls_not_ready(nodeid, rc);
- return;
- }
+ int lock_size = sizeof(struct dlm_rcom) + sizeof(struct rcom_lock);
if (dlm_recovery_stopped(ls) && (rc->rc_type != DLM_RCOM_STATUS)) {
log_debug(ls, "ignoring recovery message %x from %d",
if (is_old_reply(ls, rc))
goto out;
- if (nodeid != rc->rc_header.h_nodeid) {
- log_error(ls, "bad rcom nodeid %d from %d",
- rc->rc_header.h_nodeid, nodeid);
- goto out;
- }
-
switch (rc->rc_type) {
case DLM_RCOM_STATUS:
receive_rcom_status(ls, rc);
break;
case DLM_RCOM_LOCK:
+ if (rc->rc_header.h_length < lock_size)
+ goto Eshort;
receive_rcom_lock(ls, rc);
break;
case DLM_RCOM_STATUS_REPLY:
- receive_rcom_status_reply(ls, rc);
+ receive_sync_reply(ls, rc);
break;
case DLM_RCOM_NAMES_REPLY:
- receive_rcom_names_reply(ls, rc);
+ receive_sync_reply(ls, rc);
break;
case DLM_RCOM_LOOKUP_REPLY:
break;
case DLM_RCOM_LOCK_REPLY:
- receive_rcom_lock_reply(ls, rc);
+ if (rc->rc_header.h_length < lock_size)
+ goto Eshort;
+ dlm_recover_process_copy(ls, rc);
break;
default:
- DLM_ASSERT(0, printk("rc_type=%x\n", rc->rc_type););
+ log_error(ls, "receive_rcom bad type %d", rc->rc_type);
}
- out:
- dlm_put_lockspace(ls);
+out:
+ return;
+Eshort:
+ log_error(ls, "recovery message %x from %d is too short",
+ rc->rc_type, nodeid);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff