[Libguestfs] [PATCH 3/4] New API: pvresize-size to allow shrinking PVs (RHBZ#585222).

[Richard W.M. Jones]

-- 
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>From 9be89728f2a0ff17d54a0dba981015fa6405eb50 Mon Sep 17 00:00:00 2001
From: Richard Jones <rjones at redhat.com>
Date: Fri, 21 May 2010 14:14:25 +0100
Subject: [PATCH 3/4] New API: pvresize-size to allow shrinking PVs (RHBZ#585222).

---
 daemon/lvm.c     |   24 ++++++++++++++++++++++++
 src/generator.ml |    7 +++++++
 2 files changed, 31 insertions(+), 0 deletions(-)

diff --git a/daemon/lvm.c b/daemon/lvm.c
index 18d6519..70c3c90 100644
--- a/daemon/lvm.c
+++ b/daemon/lvm.c
@@ -20,6 +20,7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <inttypes.h>
 #include <string.h>
 #include <unistd.h>
 
@@ -453,6 +454,29 @@ do_pvresize (const char *device)
 }
 
 int
+do_pvresize_size (const char *device, int64_t size)
+{
+  char *err;
+  int r;
+
+  char buf[32];
+  snprintf (buf, sizeof buf, "%" PRIi64 "b", size);
+
+  r = command (NULL, &err,
+               "lvm", "pvresize",
+               "--setphysicalvolumesize", buf,
+               device, NULL);
+  if (r == -1) {
+    reply_with_error ("%s: %s", device, err);
+    free (err);
+    return -1;
+  }
+
+  free (err);
+  return 0;
+}
+
+int
 do_vg_activate (int activate, char *const *volgroups)
 {
   char *err;
diff --git a/src/generator.ml b/src/generator.ml
index b2ba513..1032a1a 100755
--- a/src/generator.ml
+++ b/src/generator.ml
@@ -4693,6 +4693,13 @@ See also C<guestfs_pread>.");
 This command is the same as C<guestfs_resize2fs> except that it
 allows you to specify the new size (in bytes) explicitly.");
 
+  ("pvresize_size", (RErr, [Device "device"; Int64 "size"]), 249, [Optional "lvm2"],
+   [],
+   "resize an LVM physical volume (with size)",
+   "\
+This command is the same as C<guestfs_pvresize> except that it
+allows you to specify the new size (in bytes) explicitly.");
+
 ]
 
 let all_functions = non_daemon_functions @ daemon_functions
-- 
1.6.6.1