[lvm-devel] [PATCH 20/25] Replicator: lvcreate implementation
Zdenek Kabelac
zkabelac at redhat.com
Sun Aug 8 08:57:32 UTC 2010
Signed-off-by: Zdenek Kabelac <zkabelac at redhat.com>
---
tools/commands.h | 11 ++++-
tools/lvcreate.c | 138 ++++++++++++++++++++++++++++++++++++++++++++++++++++-
2 files changed, 145 insertions(+), 4 deletions(-)
diff --git a/tools/commands.h b/tools/commands.h
index d9e13f4..595da54 100644
--- a/tools/commands.h
+++ b/tools/commands.h
@@ -1,6 +1,6 @@
/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
- * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2004-2010 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
@@ -165,6 +165,12 @@ xx(lvcreate,
"\t[-p|--permission {r|rw}]\n"
"\t[-r|--readahead ReadAheadSectors|auto|none]\n"
"\t[-R|--regionsize MirrorLogRegionSize]\n"
+ "\t[--replicator [ReplicatorName] [--replicatorlogtype ringbuffer]\n"
+ "\t[{--replicatorsynclog {disk|core}|--corelog}]\n"
+ "\t[--site LocalSiteName [--sitepolicy {sync|warn|stall|drop|fail}]\n"
+ "\t [--remotevg RemoteVGName] [{--fallbehindsize Size[bBsSkKmMgG]|\n"
+ "\t --fallbehindios IOCount|--fallbehindtimeout Secs}]]\n"
+ "\t[--replicatordev]\n"
"\t[-t|--test]\n"
"\t[--type VolumeType]\n"
"\t[-v|--verbose]\n"
@@ -203,6 +209,9 @@ xx(lvcreate,
mirrorlog_ARG, mirrors_ARG, monitor_ARG, name_ARG, nosync_ARG, noudevsync_ARG,
permission_ARG, persistent_ARG, readahead_ARG, regionsize_ARG, size_ARG,
snapshot_ARG, stripes_ARG, stripesize_ARG, test_ARG, type_ARG,
+ fallbehindios_ARG, fallbehindsize_ARG, fallbehindtimeout_ARG,
+ remotevg_ARG, replicated_ARG, replicator_ARG, replicatorlogtype_ARG,
+ site_ARG, sitepolicy_ARG,
virtualoriginsize_ARG, virtualsize_ARG, zero_ARG)
xx(lvdisplay,
diff --git a/tools/lvcreate.c b/tools/lvcreate.c
index de5b59c..d89678f 100644
--- a/tools/lvcreate.c
+++ b/tools/lvcreate.c
@@ -1,6 +1,6 @@
/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
- * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2004-2010 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
@@ -64,9 +64,33 @@ static int _lvcreate_name_params(struct lvcreate_params *lp,
log_error("Please provide a volume group name");
return 0;
}
-
} else {
vg_name = skip_dev_dir(cmd, argv[0], NULL);
+ if (lp->replicator || lp->replicated) {
+ /*
+ * support with following combinations
+ * --replicator -n lv ... vg
+ * --replicator ... vg/rep_lv
+ * --site site --replicator ... vg/rep_lv
+ * --replicated -n lv --replicator ... vg/rep_lv
+ */
+ if (!(ptr = strrchr(vg_name, '/'))) {
+ if (!lp->lv_name || lp->replicated) {
+ log_error("Replicator logical volume name "
+ "expected with volume group name.");
+ return 0;
+ }
+ } else {
+ ptr[0] = '\0';
+ lp->replicator = ptr + 1;
+ }
+
+ if (!lp->lv_name &&
+ !lp->replicated &&
+ lp->replicator[0])
+ lp->lv_name = lp->replicator;
+ }
+
if (strrchr(vg_name, '/')) {
log_error("Volume group name expected "
"(no slash)");
@@ -311,7 +335,84 @@ static int _read_mirror_params(struct lvcreate_params *lp,
}
if (!_validate_mirror_params(cmd, lp))
+ return_0;
+
+ return 1;
+}
+
+static int _read_replicator_params(struct lvcreate_params *lp,
+ struct cmd_context *cmd)
+{
+ int region_size;
+ const char *replicatorsynclog;
+ int corelog = arg_count(cmd, corelog_ARG);
+ int changed;
+
+ if (arg_count(cmd, sitepolicy_ARG)) {
+ log_error("FIXME: Sorry, site policy parameter is not yet supported.");
return 0;
+ }
+
+ replicatorsynclog = arg_str_value(cmd, replicatorsynclog_ARG,
+ corelog ? "core" : DEFAULT_REPLICATOR_SYNCLOG);
+
+ if (strcmp("core", replicatorsynclog) && corelog) {
+ log_error("Please use only one of --replicatorlog or --corelog.");
+ return 0;
+ }
+
+ if (!strcmp("disk", replicatorsynclog))
+ lp->log_count = 1;
+ else if (!strcmp("core", replicatorsynclog))
+ lp->log_count = 0;
+ else {
+ log_error("Unknown replicatorsynclog type: %s.", replicatorsynclog);
+ return 0;
+ }
+
+ log_verbose("Setting sync logging type to %s", replicatorsynclog);
+ if (arg_count(cmd, regionsize_ARG)) {
+ if (arg_sign_value(cmd, regionsize_ARG, 0) == SIGN_MINUS) {
+ log_error("Negative regionsize is invalid.");
+ return 0;
+ }
+ lp->region_size = arg_uint_value(cmd, regionsize_ARG, 0);
+ } else {
+ region_size = 2 * find_config_tree_int(cmd,
+ "activation/replicator_region_size",
+ DEFAULT_REPLICATOR_REGION_SIZE);
+ if (region_size < 0) {
+ log_error("Negative replicator_region_size in configuration "
+ "file is invalid.");
+ return 0;
+ }
+ lp->region_size = region_size;
+ }
+
+ if (!_validate_mirror_params(cmd, lp)) /* reuse for mirror's region_size */
+ return 0;
+
+ lp->rlog_type = arg_str_value(cmd, replicatorlogtype_ARG,
+ DEFAULT_REPLICATOR_LOG_TYPE);
+
+ if (strcmp(lp->rlog_type, DEFAULT_REPLICATOR_LOG_TYPE)) {
+ log_error("Unsupported replicator log type %s.", lp->rlog_type);
+ return 0;
+ }
+
+ if (arg_count(cmd, remotevg_ARG))
+ lp->rsite.vg_name = arg_str_value(cmd, remotevg_ARG, NULL);
+
+ if (arg_count(cmd, site_ARG)) {
+ lp->rsite.name = arg_str_value(cmd, site_ARG,
+ DEFAULT_REPLICATOR_LOCAL_SITE_NAME);
+ lp->lv_name = NULL; /* cannot create LV when creating site */
+ /* FIXME: improve lv_create_single to handle --site case */
+ }
+
+ lp->rsite.policy = DM_REPLICATOR_SYNC;
+ if (!get_replicator_site_params(cmd, &lp->rsite, &changed))
+ return_0;
return 1;
}
@@ -323,6 +424,7 @@ static int _lvcreate_params(struct lvcreate_params *lp,
{
int contiguous;
unsigned pagesize;
+ int i;
memset(lp, 0, sizeof(*lp));
memset(lcp, 0, sizeof(*lcp));
@@ -342,6 +444,12 @@ static int _lvcreate_params(struct lvcreate_params *lp,
if (seg_is_mirrored(lp))
lp->mirrors = 2;
+ if (seg_is_replicator(lp) || arg_count(cmd, replicator_ARG))
+ lp->replicator = ""; /* later set replicator name */
+
+ if (seg_is_replicated(lp) || arg_count(cmd, replicated_ARG))
+ lp->replicated = 1;
+
if (arg_count(cmd, mirrors_ARG)) {
lp->mirrors = arg_uint_value(cmd, mirrors_ARG, 0) + 1;
if (lp->mirrors == 1)
@@ -379,7 +487,7 @@ static int _lvcreate_params(struct lvcreate_params *lp,
}
}
- if (lp->mirrors > 1) {
+ if (lp->mirrors > 1 || lp->replicator) {
if (lp->snapshot) {
log_error("mirrors and snapshots are currently "
"incompatible");
@@ -405,6 +513,29 @@ static int _lvcreate_params(struct lvcreate_params *lp,
}
}
+ if (!lp->replicator) {
+ static const struct {
+ const char str[20]; // carefull
+ int argname;
+ } repargs[] = {
+ { "fallbehindsize", fallbehindsize_ARG },
+ { "fallbehindios", fallbehindios_ARG },
+ { "fallbehindtimeout", fallbehindtimeout_ARG },
+ { "remotevg", remotevg_ARG },
+ { "replicatorlogtype", replicatorlogtype_ARG },
+ { "replicatorsynclog", replicatorsynclog_ARG },
+ { "site", site_ARG },
+ { "sitepolicy", sitepolicy_ARG }
+ };
+
+ for (i = 0; i < sizeof(repargs)/sizeof(repargs[0]); ++i)
+ if (arg_count(cmd, repargs[i].argname)) {
+ log_error("--%s is only available "
+ "with replicators.", repargs[i].str);
+ return 0;
+ }
+ }
+
if (activation() && lp->segtype->ops->target_present &&
!lp->segtype->ops->target_present(cmd, NULL, NULL)) {
log_error("%s: Required device-mapper target(s) not "
@@ -419,6 +550,7 @@ static int _lvcreate_params(struct lvcreate_params *lp,
if (!_lvcreate_name_params(lp, cmd, &argc, &argv) ||
!_read_size_params(lp, lcp, cmd) ||
!get_stripe_params(cmd, &lp->stripes, &lp->stripe_size) ||
+ !_read_replicator_params(lp, cmd) ||
!_read_mirror_params(lp, cmd))
return_0;
--
1.7.2.1
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