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git://sourceware.org/git/lvm2.git
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Add code to lvmetad's testclient that scans an actual physical device,
effectively emulating a future "pvscan --lvmetad" command.
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parent
c33d33bab7
commit
4eb53158e5
@ -1,8 +1,12 @@
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#include "lvmetad-client.h"
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#include "label.h"
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#include "lvmcache.h"
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#include "metadata.h"
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const char *uuid1 = "abcd-efgh";
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const char *uuid2 = "bbcd-efgh";
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const char *vgid = "yada-yada";
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const char *uuid3 = "cbcd-efgh";
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const char *metadata2 = "{\n"
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"id = \"yada-yada\"\n"
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@ -23,27 +27,100 @@ const char *metadata2 = "{\n"
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"}\n"
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"}\n";
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void pv_add(daemon_handle h, const char *uuid, const char *metadata)
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void _handle_reply(daemon_reply reply) {
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const char *repl = daemon_reply_str(reply, "response", NULL);
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const char *status = daemon_reply_str(reply, "status", NULL);
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const char *vgid = daemon_reply_str(reply, "vgid", NULL);
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fprintf(stderr, "[C] REPLY: %s\n", repl);
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if (!strcmp(repl, "failed"))
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fprintf(stderr, "[C] REASON: %s\n", daemon_reply_str(reply, "reason", "unknown"));
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if (vgid)
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fprintf(stderr, "[C] VGID: %s\n", vgid);
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if (status)
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fprintf(stderr, "[C] STATUS: %s\n", status);
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daemon_reply_destroy(reply);
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}
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void _pv_add(daemon_handle h, const char *uuid, const char *metadata)
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{
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daemon_reply reply = daemon_send_simple(h, "pv_add", "uuid = %s", uuid,
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"metadata = %b", metadata,
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NULL);
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const char *repl = daemon_reply_str(reply, "response", NULL);
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fprintf(stderr, "[C] REPLY: %s\n", repl);
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if (!strcmp(repl, "failed"))
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fprintf(stderr, "[C] REASON: %s\n", daemon_reply_str(reply, "reason", "unknown"));
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_handle_reply(reply);
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}
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int scan(daemon_handle h, char *fn) {
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struct device *dev = dev_cache_get(fn, NULL);
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struct label *label;
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if (!label_read(dev, &label, 0)) {
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fprintf(stderr, "[C] no label found on %s\n", fn);
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return;
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}
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char uuid[64];
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id_write_format(dev->pvid, uuid, 64);
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fprintf(stderr, "[C] found PV: %s\n", uuid);
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struct lvmcache_info *info = (struct lvmcache_info *) label->info;
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struct physical_volume pv = { 0, };
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if (!(info->fmt->ops->pv_read(info->fmt, dev_name(dev), &pv, 0))) {
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fprintf(stderr, "[C] Failed to read PV %s", dev_name(dev));
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return;
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}
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struct format_instance_ctx fic;
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struct format_instance *fid = info->fmt->ops->create_instance(info->fmt, &fic);
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struct metadata_area *mda;
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struct volume_group *vg = NULL;
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dm_list_iterate_items(mda, &info->mdas) {
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struct volume_group *this = mda->ops->vg_read(fid, "", mda);
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if (this && !vg || this->seqno > vg->seqno)
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vg = this;
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}
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if (vg) {
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char *buf = NULL;
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/* TODO. This is not entirely correct, since export_vg_to_buffer
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* adds trailing garbage to the buffer. We may need to use
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* export_vg_to_config_tree and format the buffer ourselves. It
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* does, however, work for now, since the garbage is well
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* formatted and has no conflicting keys with the rest of the
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* request. */
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export_vg_to_buffer(vg, &buf);
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daemon_reply reply =
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daemon_send_simple(h, "pv_add", "uuid = %s", uuid,
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"metadata = %b", strchr(buf, '{'),
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NULL);
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_handle_reply(reply);
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}
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}
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void _dump_vg(daemon_handle h, const char *uuid)
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{
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daemon_reply reply = daemon_send_simple(h, "vg_by_uuid", "uuid = %s", uuid, NULL);
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fprintf(stderr, "[C] reply buffer: %s\n", reply.buffer);
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daemon_reply_destroy(reply);
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}
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int main() {
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int main(int argc, char **argv) {
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daemon_handle h = lvmetad_open();
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pv_add(h, uuid1, NULL);
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pv_add(h, uuid2, metadata2);
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if (argc > 1) {
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int i;
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struct cmd_context *cmd = create_toolcontext(0, NULL, 0);
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for (i = 1; i < argc; ++i) {
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const char *uuid = NULL;
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scan(h, argv[i]);
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}
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destroy_toolcontext(cmd);
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return 0;
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}
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daemon_reply reply = daemon_send_simple(h, "vg_by_uuid", "uuid = %s", vgid, NULL);
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fprintf(stderr, "[C] reply buffer: %s\n", reply.buffer);
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daemon_reply_destroy(reply);
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_pv_add(h, uuid1, NULL);
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_pv_add(h, uuid2, metadata2);
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_dump_vg(h, vgid);
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_pv_add(h, uuid3, NULL);
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daemon_close(h);
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return 0;
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