[lvm-devel] LVM2/liblvm .exported_symbols lvm.h lvm_lv.c
wysochanski at sourceware.org
wysochanski at sourceware.org
Sun Jul 26 20:57:38 UTC 2009
CVSROOT: /cvs/lvm2
Module name: LVM2
Changes by: wysochanski at sourceware.org 2009-07-26 20:57:38
Modified files:
liblvm : .exported_symbols lvm.h lvm_lv.c
Log message:
Implement lvm_lv_activate and lvm_lv_deactivate liblvm calls.
Limited implementation but other types of activation should probably have
separate calls. We also currently do not handle pvmoves or lvconverts.
Author: Dave Wysochanski <dwysocha at redhat.com>
Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/liblvm/.exported_symbols.diff?cvsroot=lvm2&r1=1.15&r2=1.16
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/liblvm/lvm.h.diff?cvsroot=lvm2&r1=1.24&r2=1.25
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/liblvm/lvm_lv.c.diff?cvsroot=lvm2&r1=1.5&r2=1.6
--- LVM2/liblvm/.exported_symbols 2009/07/26 16:44:05 1.15
+++ LVM2/liblvm/.exported_symbols 2009/07/26 20:57:37 1.16
@@ -12,6 +12,8 @@
lvm_vg_get_extent_count
lvm_vg_get_free_extent_count
lvm_vg_get_pv_count
+lvm_lv_activate
+lvm_lv_deactivate
lvm_lv_get_uuid
lvm_lv_get_name
lvm_lv_get_size
--- LVM2/liblvm/lvm.h 2009/07/26 20:28:59 1.24
+++ LVM2/liblvm/lvm.h 2009/07/26 20:57:37 1.25
@@ -443,6 +443,31 @@
lv_t *lvm_vg_create_lv_linear(vg_t *vg, const char *name, uint64_t size);
/**
+ * Activate a logical volume.
+ *
+ * This API is the equivalent of the lvm command "lvchange -ay".
+ *
+ * NOTE: This API cannot currently handle LVs with an in-progress pvmove or
+ * lvconvert.
+ *
+ * \param lv
+ * Logical volume handle.
+ * \return 0 (success) or -1 (failure).
+ */
+int lvm_lv_activate(lv_t *lv);
+
+/**
+ * Deactivate a logical volume.
+ *
+ * This API is the equivalent of the lvm command "lvchange -an".
+ *
+ * \param lv
+ * Logical volume handle.
+ * \return 0 (success) or -1 (failure).
+ */
+int lvm_lv_deactivate(lv_t *lv);
+
+/**
* Remove a logical volume from a volume group.
*
* This function commits the change to disk and does _not_ require calling
--- LVM2/liblvm/lvm_lv.c 2009/07/26 20:28:59 1.5
+++ LVM2/liblvm/lvm_lv.c 2009/07/26 20:57:37 1.6
@@ -18,6 +18,8 @@
#include "lvm-string.h"
#include "defaults.h"
#include "segtype.h"
+#include "locking.h"
+
#include <string.h>
/* FIXME: have lib/report/report.c _disp function call lv_size()? */
@@ -104,3 +106,51 @@
return -1;
return 0;
}
+
+int lvm_lv_activate(lv_t *lv)
+{
+ if (!lv || !lv->vg || vg_read_error(lv->vg) || !lv->vg->cmd)
+ return -1;
+
+ /* FIXME: handle pvmove stuff later */
+ if (lv->status & LOCKED) {
+ log_error("Unable to activate locked LV\n");
+ return -1;
+ }
+
+ /* FIXME: handle lvconvert stuff later */
+ if (lv->status & CONVERTING) {
+ log_error("Unable to activate LV with in-progress lvconvert\n");
+ return -1;
+ }
+
+ if (lv_is_origin(lv)) {
+ log_verbose("Activating logical volume \"%s\" "
+ "exclusively", lv->name);
+ if (!activate_lv_excl(lv->vg->cmd, lv)) {
+ log_error("Activate exclusive failed.\n");
+ return -1;
+ }
+ } else {
+ log_verbose("Activating logical volume \"%s\"",
+ lv->name);
+ if (!activate_lv(lv->vg->cmd, lv)) {
+ log_error("Activate failed.\n");
+ return -1;
+ }
+ }
+ return 0;
+}
+
+int lvm_lv_deactivate(lv_t *lv)
+{
+ if (!lv || !lv->vg || vg_read_error(lv->vg) || !lv->vg->cmd)
+ return -1;
+
+ log_verbose("Deactivating logical volume \"%s\"", lv->name);
+ if (!deactivate_lv(lv->vg->cmd, lv)) {
+ log_error("Deactivate failed.\n");
+ return -1;
+ }
+ return 0;
+}
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