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fix recursive lock hang in xenstore driver
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ad70b32414
commit
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@ -1,3 +1,7 @@
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Fri Jan 23 11:07:42 PST 2009 John Levon <john.levon@sun.com>
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* src/xs_internal.c: fix recursive lock hang
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Fri Jan 23 16:20:03 GMT 2009 Daniel P. Berrange <berrange@redhat.com>
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* src/qemu_conf.c: Support driver format for setting disk
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@ -564,6 +564,46 @@ xenStoreNumOfDomains(virConnectPtr conn)
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return(ret);
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}
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/**
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* xenStoreDoListDomains:
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* @conn: pointer to the hypervisor connection
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* @ids: array to collect the list of IDs of active domains
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* @maxids: size of @ids
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*
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* Internal API: collect the list of active domains, and store
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* their ID in @maxids. The driver lock must be held.
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*
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* Returns the number of domain found or -1 in case of error
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*/
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static int
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xenStoreDoListDomains(xenUnifiedPrivatePtr priv, int *ids, int maxids)
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{
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char **idlist = NULL, *endptr;
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unsigned int num, i;
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int ret = -1;
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long id;
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if (priv->xshandle == NULL)
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goto out;
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idlist = xs_directory (priv->xshandle, 0, "/local/domain", &num);
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if (idlist == NULL)
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goto out;
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for (ret = 0, i = 0; (i < num) && (ret < maxids); i++) {
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id = strtol(idlist[i], &endptr, 10);
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if ((endptr == idlist[i]) || (*endptr != 0))
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goto out;
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ids[ret++] = (int) id;
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}
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free(idlist);
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out:
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VIR_FREE (idlist);
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return ret;
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}
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/**
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* xenStoreListDomains:
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* @conn: pointer to the hypervisor connection
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@ -577,11 +617,8 @@ xenStoreNumOfDomains(virConnectPtr conn)
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int
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xenStoreListDomains(virConnectPtr conn, int *ids, int maxids)
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{
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char **idlist = NULL, *endptr;
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unsigned int num, i;
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int ret;
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long id;
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xenUnifiedPrivatePtr priv;
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int ret;
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if ((conn == NULL) || (ids == NULL)) {
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virXenStoreError(conn, VIR_ERR_INVALID_ARG, __FUNCTION__);
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@ -591,32 +628,10 @@ xenStoreListDomains(virConnectPtr conn, int *ids, int maxids)
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priv = (xenUnifiedPrivatePtr) conn->privateData;
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xenUnifiedLock(priv);
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if (priv->xshandle == NULL)
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goto error;
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idlist = xs_directory (priv->xshandle, 0, "/local/domain", &num);
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if (idlist == NULL)
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goto error;
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for (ret = 0, i = 0; (i < num) && (ret < maxids); i++) {
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id = strtol(idlist[i], &endptr, 10);
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if ((endptr == idlist[i]) || (*endptr != 0)) {
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ret = -1;
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break;
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}
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#if 0
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if (virConnectCheckStoreID(conn, (int) id) < 0)
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continue;
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#endif
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ids[ret++] = (int) id;
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}
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free(idlist);
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ret = xenStoreDoListDomains(priv, ids, maxids);
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xenUnifiedUnlock(priv);
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return(ret);
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error:
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xenUnifiedUnlock(priv);
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return -1;
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}
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/**
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@ -1260,7 +1275,7 @@ retry:
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"%s", _("failed to allocate domids"));
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return -1;
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}
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nread = xenStoreListDomains(conn, new_domids, new_domain_cnt);
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nread = xenStoreDoListDomains(priv, new_domids, new_domain_cnt);
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if (nread != new_domain_cnt) {
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// mismatch. retry this read
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VIR_FREE(new_domids);
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@ -1342,7 +1357,7 @@ retry:
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"%s", _("failed to allocate domids"));
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return -1;
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}
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nread = xenStoreListDomains(conn, new_domids, new_domain_cnt);
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nread = xenStoreDoListDomains(priv, new_domids, new_domain_cnt);
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if (nread != new_domain_cnt) {
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// mismatch. retry this read
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VIR_FREE(new_domids);
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