This is the mail archive of the
lvm2-cvs@sourceware.org
mailing list for the LVM2 project.
LVM2/liblvm .exported_symbols lvm.h lvm_vg.c
- From: wysochanski at sourceware dot org
- To: lvm-devel at redhat dot com, lvm2-cvs at sourceware dot org
- Date: 22 Jul 2009 22:24:17 -0000
- Subject: LVM2/liblvm .exported_symbols lvm.h lvm_vg.c
CVSROOT: /cvs/lvm2
Module name: LVM2
Changes by: wysochanski@sourceware.org 2009-07-22 22:24:17
Modified files:
liblvm : .exported_symbols lvm.h lvm_vg.c
Log message:
Add lvm_vg_open() to open an existing VG for reading or writing.
lvm_vg_open() calls internal vg_read() function which is the entry point
for reading an existing VG. In addition to the mode, we include a 'flags'
parameter for future extensions.
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/liblvm/.exported_symbols.diff?cvsroot=lvm2&r1=1.3&r2=1.4
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/liblvm/lvm.h.diff?cvsroot=lvm2&r1=1.4&r2=1.5
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/liblvm/lvm_vg.c.diff?cvsroot=lvm2&r1=1.2&r2=1.3
--- LVM2/liblvm/.exported_symbols 2009/07/22 03:13:13 1.3
+++ LVM2/liblvm/.exported_symbols 2009/07/22 22:24:16 1.4
@@ -5,6 +5,7 @@
lvm_vg_extend
lvm_vg_set_extent_size
lvm_vg_write
+lvm_vg_open
lvm_vg_close
lvm_vg_remove
lvm_errno
--- LVM2/liblvm/lvm.h 2009/07/16 03:07:46 1.4
+++ LVM2/liblvm/lvm.h 2009/07/22 22:24:16 1.5
@@ -190,4 +190,27 @@
*/
int lvm_vg_close(vg_t *vg);
+/**
+ * Open an existing VG.
+ *
+ * Open a VG for reading or writing.
+ *
+ * \param libh
+ * Handle obtained from lvm_create.
+ *
+ * \param vgname
+ * Name of the VG to open.
+ *
+ * \param mode
+ * Open mode - either "r" (read) or "w" (read/write).
+ * Any other character results in an error with EINVAL set.
+ *
+ * \param flags
+ * Open flags - currently ignored.
+ *
+ * \return non-NULL VG handle (success) or NULL (failure).
+ */
+vg_t *lvm_vg_open(lvm_t libh, const char *vgname, const char *mode,
+ uint32_t flags);
+
#endif /* _LIB_LVM_H */
--- LVM2/liblvm/lvm_vg.c 2009/07/22 03:13:35 1.2
+++ LVM2/liblvm/lvm_vg.c 2009/07/22 22:24:16 1.3
@@ -12,6 +12,9 @@
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
+#include <errno.h>
+#include <string.h>
+
#include "lib.h"
#include "lvm.h"
#include "toolcontext.h"
@@ -80,3 +83,26 @@
bad:
return 0;
}
+
+vg_t *lvm_vg_open(lvm_t libh, const char *vgname, const char *mode,
+ uint32_t flags)
+{
+ uint32_t internal_flags = 0;
+ vg_t *vg;
+
+ if (!strncmp(mode, "w", 1))
+ internal_flags |= READ_FOR_UPDATE;
+ else if (strncmp(mode, "r", 1)) {
+ log_errno(EINVAL, "Invalid VG open mode");
+ return NULL;
+ }
+
+ vg = vg_read((struct cmd_context *)libh, vgname, NULL, internal_flags);
+ if (vg_read_error(vg)) {
+ /* FIXME: use log_errno either here in inside vg_read */
+ vg_release(vg);
+ return NULL;
+ }
+
+ return vg;
+}