[lvm-devel] LVM2 lib/metadata/metadata-exported.h lib/meta ...
prajnoha at sourceware.org
prajnoha at sourceware.org
Mon Feb 21 12:29:22 UTC 2011
CVSROOT: /cvs/lvm2
Module name: LVM2
Changes by: prajnoha at sourceware.org 2011-02-21 12:29:21
Modified files:
lib/metadata : metadata-exported.h metadata.c
tools : vgconvert.c
Log message:
Fix vgconvert code to work with changes in metadata area handling and changes
in format_instance. Add new 'vg_convert' function.
Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/lib/metadata/metadata-exported.h.diff?cvsroot=lvm2&r1=1.181&r2=1.182
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/lib/metadata/metadata.c.diff?cvsroot=lvm2&r1=1.432&r2=1.433
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/tools/vgconvert.c.diff?cvsroot=lvm2&r1=1.47&r2=1.48
--- LVM2/lib/metadata/metadata-exported.h 2011/02/21 12:27:26 1.181
+++ LVM2/lib/metadata/metadata-exported.h 2011/02/21 12:29:21 1.182
@@ -442,6 +442,9 @@
int vg_remove(struct volume_group *vg);
int vg_rename(struct cmd_context *cmd, struct volume_group *vg,
const char *new_name);
+int vg_convert(struct cmd_context *cmd, struct volume_group *vg,
+ const struct format_type *target_fmt, int64_t label_sector,
+ int pvmetadatacopies, uint64_t pvmetadatasize);
int vg_extend(struct volume_group *vg, int pv_count, const char *const *pv_names,
struct pvcreate_params *pp);
int vg_reduce(struct volume_group *vg, const char *pv_name);
--- LVM2/lib/metadata/metadata.c 2011/02/21 12:26:27 1.432
+++ LVM2/lib/metadata/metadata.c 2011/02/21 12:29:21 1.433
@@ -496,6 +496,109 @@
return 1;
}
+int vg_convert(struct cmd_context *cmd, struct volume_group *vg,
+ const struct format_type *target_fmt, int64_t label_sector,
+ int pvmetadatacopies, uint64_t pvmetadatasize)
+{
+ struct physical_volume *pv, *existing_pv;
+ struct format_instance_ctx fic;
+ uint64_t pe_start = 0;
+ struct pv_list *pvl;
+ int change_made = 0;
+ const char *vg_name = vg->name;
+
+ /* Replace an old format instance with a new empty one. */
+ vg->fid->fmt->ops->destroy_instance(vg->fid);
+ fic.type = FMT_INSTANCE_VG | FMT_INSTANCE_AUX_MDAS;
+ fic.context.vg_ref.vg_name = vg_name;
+ fic.context.vg_ref.vg_id = NULL;
+ if (!(vg->fid = target_fmt->ops->create_instance(target_fmt, &fic))) {
+ log_error("Couldn't create target format instance "
+ "for VG %s.", vg_name);
+ return 0;
+ }
+
+ /*
+ * Create new PVs in target format taking original PVs as coimage.
+ * Write the new PVs out and replace the old PVs in VG structure
+ * with the new PVs.
+ */
+ dm_list_iterate_items(pvl, &vg->pvs) {
+ existing_pv = pvl->pv;
+ pe_start = pv_pe_start(existing_pv);
+
+ if (!(pv = pv_create(cmd, pv_dev(existing_pv),
+ &existing_pv->id,
+ 0, 0, 0, pe_start,
+ pv_pe_count(existing_pv),
+ pv_pe_size(existing_pv),
+ label_sector, pvmetadatacopies,
+ pvmetadatasize, 0))) {
+ log_error("Failed to setup physical volume \"%s\"",
+ pv_dev_name(existing_pv));
+ if (change_made)
+ goto revert;
+ return 0;
+ }
+
+ /* Need to revert manually if it fails after this point */
+ change_made = 1;
+
+ log_verbose("Set up physical volume for \"%s\" with %" PRIu64
+ " available sectors", pv_dev_name(pv), pv_size(pv));
+
+ /* Wipe existing label first */
+ if (!label_remove(pv_dev(pv))) {
+ log_error("Failed to wipe existing label on %s",
+ pv_dev_name(pv));
+ }
+
+ log_very_verbose("Writing physical volume data to disk \"%s\"",
+ pv_dev_name(pv));
+ /* FIXME: This pv_write will change the VG assignment for the
+ * PV info in the cache to orphan VG! We should just change
+ * the existing VG format information in the cache or throw
+ * the cache away after this pv_write. */
+ if (!(pv_write(cmd, pv))) {
+ log_error("Failed to write physical volume \"%s\"",
+ pv_dev_name(pv));
+ goto revert;
+ }
+ log_verbose("Physical volume \"%s\" successfully created",
+ pv_dev_name(pv));
+
+ if (!vg->fid->fmt->ops->pv_setup(vg->fid->fmt, pv, vg)) {
+ log_error("Failed to setup PV %s in new format for VG %s.",
+ pv_dev_name(pv), vg_name);
+ goto revert;
+ }
+
+ /* FIXME: Free the mem used by the old PV structure? */
+
+ /* Copy relevant fields from old PV and further initialise new PV. */
+ pv->vg = vg;
+ if (!(pv->vg_name = dm_pool_strdup(vg->vgmem, vg_name))) {
+ log_error("vg->name allocation failed for %s",pv_dev_name(pv));
+ goto revert;
+ }
+ memcpy(&pv->vgid, &vg->id, sizeof(vg->id));
+ if (!alloc_pv_segment_whole_pv(vg->vgmem, pv)) {
+ log_error("pv->segments allocation failed for %s", pv_dev_name(pv));
+ goto revert;
+ }
+
+ pvl->pv = pv;
+ }
+
+
+ return 1;
+
+revert:
+ log_error("Use pvcreate and vgcfgrestore to repair "
+ "from archived metadata.");
+ return 0;
+}
+
int remove_lvs_in_vg(struct cmd_context *cmd,
struct volume_group *vg,
force_t force)
--- LVM2/tools/vgconvert.c 2011/02/21 12:26:28 1.47
+++ LVM2/tools/vgconvert.c 2011/02/21 12:29:21 1.48
@@ -19,16 +19,11 @@
struct volume_group *vg,
void *handle __attribute__((unused)))
{
- struct physical_volume *pv, *existing_pv;
+ const struct format_type *target_fmt = cmd->fmt;
struct logical_volume *lv;
struct lv_list *lvl;
- uint64_t size = 0;
- struct dm_list mdas;
int pvmetadatacopies = 0;
uint64_t pvmetadatasize = 0;
- uint64_t pe_start = 0;
- struct pv_list *pvl;
- int change_made = 0;
struct lvinfo info;
int active = 0;
@@ -37,13 +32,13 @@
return ECMD_FAILED;
}
- if (vg->fid->fmt == cmd->fmt) {
+ if (vg->fid->fmt == target_fmt) {
log_error("Volume group \"%s\" already uses format %s",
vg_name, cmd->fmt->name);
return ECMD_FAILED;
}
- if (cmd->fmt->features & FMT_MDAS) {
+ if (target_fmt->features & FMT_MDAS) {
if (arg_sign_value(cmd, metadatasize_ARG, 0) == SIGN_MINUS) {
log_error("Metadata size may not be negative");
return EINVALID_CMD_LINE;
@@ -72,7 +67,7 @@
/* Set PV/LV limit if converting from unlimited metadata format */
if (vg->fid->fmt->features & FMT_UNLIMITED_VOLS &&
- !(cmd->fmt->features & FMT_UNLIMITED_VOLS)) {
+ !(target_fmt->features & FMT_UNLIMITED_VOLS)) {
if (!vg->max_lv)
vg->max_lv = 255;
if (!vg->max_pv)
@@ -81,7 +76,7 @@
/* If converting to restricted lvid, check if lvid is compatible */
if (!(vg->fid->fmt->features & FMT_RESTRICTED_LVIDS) &&
- cmd->fmt->features & FMT_RESTRICTED_LVIDS)
+ target_fmt->features & FMT_RESTRICTED_LVIDS)
dm_list_iterate_items(lvl, &vg->lvs)
if (!lvid_in_restricted_range(&lvl->lv->lvid)) {
log_error("Logical volume %s lvid format is"
@@ -91,7 +86,7 @@
}
/* Attempt to change any LVIDs that are too big */
- if (cmd->fmt->features & FMT_RESTRICTED_LVIDS) {
+ if (target_fmt->features & FMT_RESTRICTED_LVIDS) {
dm_list_iterate_items(lvl, &vg->lvs) {
lv = lvl->lv;
if (lv->status & SNAPSHOT)
@@ -115,66 +110,18 @@
return ECMD_FAILED;
}
- dm_list_iterate_items(pvl, &vg->pvs) {
- existing_pv = pvl->pv;
-
- pe_start = pv_pe_start(existing_pv);
- /* pe_end = pv_pe_count(existing_pv) * pv_pe_size(existing_pv) + pe_start - 1; */
-
- dm_list_init(&mdas);
- if (!(pv = pv_create(cmd, pv_dev(existing_pv),
- &existing_pv->id, size, 0, 0,
- pe_start, pv_pe_count(existing_pv),
- pv_pe_size(existing_pv),
- arg_int64_value(cmd, labelsector_ARG,
- DEFAULT_LABELSECTOR),
- pvmetadatacopies, pvmetadatasize, 0))) {
- log_error("Failed to setup physical volume \"%s\"",
- pv_dev_name(existing_pv));
- if (change_made)
- log_error("Use pvcreate and vgcfgrestore to "
- "repair from archived metadata.");
- return ECMD_FAILED;
- }
-
- /* Need to revert manually if it fails after this point */
- change_made = 1;
-
- log_verbose("Set up physical volume for \"%s\" with %" PRIu64
- " available sectors", pv_dev_name(pv), pv_size(pv));
-
- /* Wipe existing label first */
- if (!label_remove(pv_dev(pv))) {
- log_error("Failed to wipe existing label on %s",
- pv_dev_name(pv));
- log_error("Use pvcreate and vgcfgrestore to repair "
- "from archived metadata.");
- return ECMD_FAILED;
- }
-
- log_very_verbose("Writing physical volume data to disk \"%s\"",
- pv_dev_name(pv));
- if (!(pv_write(cmd, pv))) {
- log_error("Failed to write physical volume \"%s\"",
- pv_dev_name(pv));
- log_error("Use pvcreate and vgcfgrestore to repair "
- "from archived metadata.");
- return ECMD_FAILED;
- }
- log_verbose("Physical volume \"%s\" successfully created",
- pv_dev_name(pv));
-
- }
-
log_verbose("Deleting existing metadata for VG %s", vg_name);
if (!vg_remove_mdas(vg)) {
log_error("Removal of existing metadata for %s failed.",
vg_name);
- log_error("Use pvcreate and vgcfgrestore to repair "
- "from archived metadata.");
- return ECMD_FAILED;
+ goto revert;
}
+ if (!vg_convert(cmd, vg, target_fmt, arg_int64_value(cmd,
+ labelsector_ARG, DEFAULT_LABELSECTOR),
+ pvmetadatacopies, pvmetadatasize))
+ goto revert;
+
/* FIXME Cache the label format change so we don't have to skip this */
if (test_mode()) {
log_verbose("Test mode: Skipping metadata writing for VG %s in"
@@ -183,18 +130,21 @@
}
log_verbose("Writing metadata for VG %s using format %s", vg_name,
- cmd->fmt->name);
- if (!backup_restore_vg(cmd, vg)) {
+ target_fmt->name);
+ if (!vg_write(vg) || !vg_commit(vg)) {
log_error("Conversion failed for volume group %s.", vg_name);
- log_error("Use pvcreate and vgcfgrestore to repair from "
- "archived metadata.");
- return ECMD_FAILED;
+ goto revert;
}
log_print("Volume group %s successfully converted", vg_name);
backup(vg);
return ECMD_PROCESSED;
+
+revert:
+ log_error("Use pvcreate and vgcfgrestore to repair "
+ "from archived metadata.");
+ return ECMD_FAILED;
}
int vgconvert(struct cmd_context *cmd, int argc, char **argv)
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