Libguestfs - Jul 2017 - [PATCH 1/1] New partition API: part_resize

This can be used to enlarge or shrink an existing partition.
---
 daemon/parted.c           | 31 +++++++++++++++++++++++++++++++
 generator/actions_core.ml | 22 ++++++++++++++++++++++
 generator/proc_nr.ml      |  1 +
 lib/MAX_PROC_NR           |  2 +-
 4 files changed, 55 insertions(+), 1 deletion(-)

diff --git a/daemon/parted.c b/daemon/parted.c
index 72e1b8420..f1205cadf 100644
--- a/daemon/parted.c
+++ b/daemon/parted.c
@@ -178,6 +178,37 @@ do_part_del (const char *device, int partnum)
 }
 
 int
+do_part_resize (const char *device, int partnum, int64_t endsect)
+{
+  int r;
+  CLEANUP_FREE char *err = NULL;
+  char endstr[32];
+  char partnum_str[16];
+
+  if (partnum <= 0) {
+    reply_with_error ("partition number must be >= 1");
+    return -1;
+  }
+
+  snprintf (partnum_str, sizeof partnum_str, "%d", partnum);
+  snprintf (endstr, sizeof endstr, "%" PRIi64 "s",
endsect);
+
+  udev_settle ();
+
+  r = commandf (NULL, &err, COMMAND_FLAG_FOLD_STDOUT_ON_STDERR,
+                "parted", "-s", "--", device,
"resizepart", partnum_str,
+                endstr, NULL);
+  if (r == -1) {
+    reply_with_error ("parted: %s: %s:", device, err);
+    return -1;
+  }
+
+  udev_settle();
+
+  return 0;
+}
+
+int
 do_part_disk (const char *device, const char *parttype)
 {
   int r;
diff --git a/generator/actions_core.ml b/generator/actions_core.ml
index ea0735676..939aec7ee 100644
--- a/generator/actions_core.ml
+++ b/generator/actions_core.ml
@@ -9646,4 +9646,26 @@ be mountable but require special options.  Filesystems
may
 not all belong to a single logical operating system
 (use C<guestfs_inspect_os> to look for OSes)." };
 
+  { defaults with
+    name = "part_resize"; added = (1, 37, 20);
+    style = RErr, [String (Device, "device"); Int
"partnum"; Int64 "endsect"], [];
+    tests = [
+      InitEmpty, Always, TestRun (
+        [["part_init"; "/dev/sda"; "mbr"];
+         ["part_add"; "/dev/sda"; "primary";
"1"; "-1025"];
+         ["part_resize"; "/dev/sda"; "1";
"-1"]]), []
+    ];
+    shortdesc = "resize a partition";
+    longdesc = "\
+This command resizes the partition numbered C<partnum> on C<device>
+by moving the end position.
+
+Note that this does not modify any filesystem present in the partition.
+If you wish to do this, you will need to use filesystem resizing
+commands like C<guestfs_resize2fs>.
+
+When growing a partition you will want to grow the filesystem
+afterwards, but when shrinking, you need to shrink the filesystem
+before the partition." };
+
 ]
diff --git a/generator/proc_nr.ml b/generator/proc_nr.ml
index dec02f5fa..7895063b6 100644
--- a/generator/proc_nr.ml
+++ b/generator/proc_nr.ml
@@ -484,6 +484,7 @@ let proc_nr = [
 474, "internal_yara_scan";
 475, "file_architecture";
 476, "list_filesystems";
+477, "part_resize";
 ]
 
 (* End of list.  If adding a new entry, add it at the end of the list
diff --git a/lib/MAX_PROC_NR b/lib/MAX_PROC_NR
index b86395733..bf2c10d23 100644
--- a/lib/MAX_PROC_NR
+++ b/lib/MAX_PROC_NR
@@ -1 +1 @@
-476
+477
-- 
2.13.3

On Sat, Jul 29, 2017 at 08:51:04PM +0300, Nikos Skalkotos
wrote:
> This can be used to enlarge or shrink an existing partition.
> ---
>  daemon/parted.c           | 31 +++++++++++++++++++++++++++++++
>  generator/actions_core.ml | 22 ++++++++++++++++++++++
>  generator/proc_nr.ml      |  1 +
>  lib/MAX_PROC_NR           |  2 +-
>  4 files changed, 55 insertions(+), 1 deletion(-)
> 
> diff --git a/daemon/parted.c b/daemon/parted.c
> index 72e1b8420..f1205cadf 100644
> --- a/daemon/parted.c
> +++ b/daemon/parted.c
> @@ -178,6 +178,37 @@ do_part_del (const char *device, int partnum)
>  }
>  
>  int
> +do_part_resize (const char *device, int partnum, int64_t endsect)
> +{
> +  int r;
> +  CLEANUP_FREE char *err = NULL;
> +  char endstr[32];
> +  char partnum_str[16];
> +
> +  if (partnum <= 0) {
> +    reply_with_error ("partition number must be >= 1");
> +    return -1;
> +  }
> +
> +  snprintf (partnum_str, sizeof partnum_str, "%d", partnum);
> +  snprintf (endstr, sizeof endstr, "%" PRIi64 "s",
endsect);
> +
> +  udev_settle ();
> +
> +  r = commandf (NULL, &err, COMMAND_FLAG_FOLD_STDOUT_ON_STDERR,
> +                "parted", "-s", "--",
device, "resizepart", partnum_str,
> +                endstr, NULL);
> +  if (r == -1) {
> +    reply_with_error ("parted: %s: %s:", device, err);
> +    return -1;
> +  }
> +
> +  udev_settle();
> +
> +  return 0;
> +}
> +
> +int
>  do_part_disk (const char *device, const char *parttype)
>  {
>    int r;
> diff --git a/generator/actions_core.ml b/generator/actions_core.ml
> index ea0735676..939aec7ee 100644
> --- a/generator/actions_core.ml
> +++ b/generator/actions_core.ml
> @@ -9646,4 +9646,26 @@ be mountable but require special options. 
Filesystems may
>  not all belong to a single logical operating system
>  (use C<guestfs_inspect_os> to look for OSes)." };
>  
> +  { defaults with
> +    name = "part_resize"; added = (1, 37, 20);
> +    style = RErr, [String (Device, "device"); Int
"partnum"; Int64 "endsect"], [];
> +    tests = [
> +      InitEmpty, Always, TestRun (
> +        [["part_init"; "/dev/sda"; "mbr"];
> +         ["part_add"; "/dev/sda"; "primary";
"1"; "-1025"];
> +         ["part_resize"; "/dev/sda"; "1";
"-1"]]), []
> +    ];
> +    shortdesc = "resize a partition";
> +    longdesc = "\
> +This command resizes the partition numbered C<partnum> on
C<device>
> +by moving the end position.
> +
> +Note that this does not modify any filesystem present in the partition.
> +If you wish to do this, you will need to use filesystem resizing
> +commands like C<guestfs_resize2fs>.
> +
> +When growing a partition you will want to grow the filesystem
> +afterwards, but when shrinking, you need to shrink the filesystem
> +before the partition." };
> +
>  ]
> diff --git a/generator/proc_nr.ml b/generator/proc_nr.ml
> index dec02f5fa..7895063b6 100644
> --- a/generator/proc_nr.ml
> +++ b/generator/proc_nr.ml
> @@ -484,6 +484,7 @@ let proc_nr = [
>  474, "internal_yara_scan";
>  475, "file_architecture";
>  476, "list_filesystems";
> +477, "part_resize";
>  ]
>  
>  (* End of list.  If adding a new entry, add it at the end of the list
> diff --git a/lib/MAX_PROC_NR b/lib/MAX_PROC_NR
> index b86395733..bf2c10d23 100644
> --- a/lib/MAX_PROC_NR
> +++ b/lib/MAX_PROC_NR
> @@ -1 +1 @@
> -476
> +477
Looks fine to me, ACK.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
libguestfs lets you edit virtual machines.  Supports shell scripting,
bindings from many languages.  http://libguestfs.org

On Sunday, 30 July 2017 17:42:07 CEST Richard W.M. Jones
wrote:
> On Sat, Jul 29, 2017 at 08:51:04PM +0300, Nikos Skalkotos wrote:
> > This can be used to enlarge or shrink an existing partition.
> > ---
> >  daemon/parted.c           | 31 +++++++++++++++++++++++++++++++
> >  generator/actions_core.ml | 22 ++++++++++++++++++++++
> >  generator/proc_nr.ml      |  1 +
> >  lib/MAX_PROC_NR           |  2 +-
> >  4 files changed, 55 insertions(+), 1 deletion(-)
> > 
> > diff --git a/daemon/parted.c b/daemon/parted.c
> > index 72e1b8420..f1205cadf 100644
> > --- a/daemon/parted.c
> > +++ b/daemon/parted.c
> > @@ -178,6 +178,37 @@ do_part_del (const char *device, int partnum)
> >  }
> >  
> >  int
> > +do_part_resize (const char *device, int partnum, int64_t endsect)
> > +{
> > +  int r;
> > +  CLEANUP_FREE char *err = NULL;
> > +  char endstr[32];
> > +  char partnum_str[16];
> > +
> > +  if (partnum <= 0) {
> > +    reply_with_error ("partition number must be >= 1");
> > +    return -1;
> > +  }
> > +
> > +  snprintf (partnum_str, sizeof partnum_str, "%d",
partnum);
> > +  snprintf (endstr, sizeof endstr, "%" PRIi64
"s", endsect);
> > +
> > +  udev_settle ();
> > +
> > +  r = commandf (NULL, &err, COMMAND_FLAG_FOLD_STDOUT_ON_STDERR,
> > +                "parted", "-s", "--",
device, "resizepart", partnum_str,
> > +                endstr, NULL);
> > +  if (r == -1) {
> > +    reply_with_error ("parted: %s: %s:", device, err);
> > +    return -1;
> > +  }
> > +
> > +  udev_settle();
> > +
> > +  return 0;
> > +}
> > +
> > +int
> >  do_part_disk (const char *device, const char *parttype)
> >  {
> >    int r;
> > diff --git a/generator/actions_core.ml b/generator/actions_core.ml
> > index ea0735676..939aec7ee 100644
> > --- a/generator/actions_core.ml
> > +++ b/generator/actions_core.ml
> > @@ -9646,4 +9646,26 @@ be mountable but require special options. 
Filesystems may
> >  not all belong to a single logical operating system
> >  (use C<guestfs_inspect_os> to look for OSes)." };
> >  
> > +  { defaults with
> > +    name = "part_resize"; added = (1, 37, 20);
> > +    style = RErr, [String (Device, "device"); Int
"partnum"; Int64 "endsect"], [];
> > +    tests = [
> > +      InitEmpty, Always, TestRun (
> > +        [["part_init"; "/dev/sda";
"mbr"];
> > +         ["part_add"; "/dev/sda";
"primary"; "1"; "-1025"];
> > +         ["part_resize"; "/dev/sda";
"1"; "-1"]]), []
> > +    ];
> > +    shortdesc = "resize a partition";
> > +    longdesc = "\
> > +This command resizes the partition numbered C<partnum> on
C<device>
> > +by moving the end position.
> > +
> > +Note that this does not modify any filesystem present in the
partition.
> > +If you wish to do this, you will need to use filesystem resizing
> > +commands like C<guestfs_resize2fs>.
> > +
> > +When growing a partition you will want to grow the filesystem
> > +afterwards, but when shrinking, you need to shrink the filesystem
> > +before the partition." };
> > +
> >  ]
> > diff --git a/generator/proc_nr.ml b/generator/proc_nr.ml
> > index dec02f5fa..7895063b6 100644
> > --- a/generator/proc_nr.ml
> > +++ b/generator/proc_nr.ml
> > @@ -484,6 +484,7 @@ let proc_nr = [
> >  474, "internal_yara_scan";
> >  475, "file_architecture";
> >  476, "list_filesystems";
> > +477, "part_resize";
> >  ]
> >  
> >  (* End of list.  If adding a new entry, add it at the end of the list
> > diff --git a/lib/MAX_PROC_NR b/lib/MAX_PROC_NR
> > index b86395733..bf2c10d23 100644
> > --- a/lib/MAX_PROC_NR
> > +++ b/lib/MAX_PROC_NR
> > @@ -1 +1 @@
> > -476
> > +477
> 
> Looks fine to me, ACK.
Idem -- hence pushed.

Thanks,
-- 
Pino Toscano

Checking out sources from https://github.com/libguestfs/libguestfs ...

/var/tmp/tmpO3AAV7/libguestfs /var/tmp/tmpO3AAV7
Reset branch 'master'
Branch master set up to track remote branch master from origin.
Your branch is up-to-date with 'origin/master'.
>From github.com:libguestfs/libguestfs
   70b6f3356..c73f0a667  master     -> origin/master
 * [new tag]             v1.37.19   -> v1.37.19
Updating 70b6f3356..c73f0a667
Fast-forward
 BUGS                        |   26 +-
 RELEASES                    |    1 +
 configure.ac                |    2 +-
 daemon/ntfs.c               |    4 +-
 daemon/parted.c             |   31 +
 docs/guestfs-building.pod   |    6 +-
 generator/actions_core.ml   |   22 +
 generator/proc_nr.ml        |    1 +
 gobject/run-live-tests      |    2 +-
 gobject/run-tests           |    2 +-
 gobject/run-tests-retvalues |    2 +-
 lib/MAX_PROC_NR             |    2 +-
 m4/guestfs_ocaml.m4         |    8 +
 po-docs/cs.po               | 2570 ++++++++++++++++++++--------------------
 po-docs/de.po               | 2570 ++++++++++++++++++++--------------------
 po-docs/en_GB.po            | 2707 ++++++++++++++++++++++---------------------
 po-docs/es.po               | 2570 ++++++++++++++++++++--------------------
 po-docs/eu.po               | 2570 ++++++++++++++++++++--------------------
 po-docs/fr.po               | 2622 ++++++++++++++++++++---------------------
 po-docs/ja.po               | 2570 ++++++++++++++++++++--------------------
 po-docs/libguestfs-docs.pot | 2479 +++++++++++++++++++--------------------
 po-docs/nl.po               | 2570 ++++++++++++++++++++--------------------
 po-docs/pt_BR.po            | 2570 ++++++++++++++++++++--------------------
 po-docs/tg.po               | 2570 ++++++++++++++++++++--------------------
 po-docs/uk.po               | 2700 +++++++++++++++++++++---------------------
 po-docs/zh_CN.po            | 2570 ++++++++++++++++++++--------------------
 po/POTFILES                 |    7 +-
 po/ca.po                    |   67 +-
 po/de.po                    |   67 +-
 po/en_GB.po                 |   67 +-
 po/es.po                    |   70 +-
 po/eu.po                    |   67 +-
 po/fr.po                    |   70 +-
 po/gu.po                    |   67 +-
 po/hi.po                    |   67 +-
 po/ja.po                    |   70 +-
 po/kn.po                    |   67 +-
 po/libguestfs.pot           |   69 +-
 po/ml.po                    |   67 +-
 po/mr.po                    |   70 +-
 po/nl.po                    |   70 +-
 po/or.po                    |   67 +-
 po/pa.po                    |   70 +-
 po/pl.po                    |   70 +-
 po/pt_BR.po                 |   67 +-
 po/ru.po                    |   67 +-
 po/ta.po                    |   67 +-
 po/te.po                    |   67 +-
 po/tg.po                    |   67 +-
 po/uk.po                    |   70 +-
 po/zh_CN.po                 |   67 +-
 po/zh_TW.po                 |   67 +-
 52 files changed, 17727 insertions(+), 17728 deletions(-)
/var/tmp/tmpO3AAV7

Applying patches ...

/var/tmp/tmpO3AAV7/libguestfs /var/tmp/tmpO3AAV7
error: patch failed: generator/actions_core.ml:9646
error: generator/actions_core.ml: patch does not apply
error: patch failed: generator/proc_nr.ml:484
error: generator/proc_nr.ml: patch does not apply
error: patch failed: lib/MAX_PROC_NR:1
error: lib/MAX_PROC_NR: patch does not apply
Applying: New partition API: part_resize
Patch failed at 0001 New partition API: part_resize
The copy of the patch that failed is found in: .git/rebase-apply/patch
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am
--abort".

Checking out sources from https://github.com/libguestfs/libguestfs ...

/var/tmp/tmpCmhm7s/libguestfs /var/tmp/tmpCmhm7s
Reset branch 'master'
Branch master set up to track remote branch master from origin.
Your branch is up-to-date with 'origin/master'.
>From github.com:libguestfs/libguestfs
   70b6f3356..c73f0a667  master     -> origin/master
 * [new tag]             v1.37.19   -> v1.37.19
Updating 70b6f3356..c73f0a667
Fast-forward
 BUGS                        |   26 +-
 RELEASES                    |    1 +
 configure.ac                |    2 +-
 daemon/ntfs.c               |    4 +-
 daemon/parted.c             |   31 +
 docs/guestfs-building.pod   |    6 +-
 generator/actions_core.ml   |   22 +
 generator/proc_nr.ml        |    1 +
 gobject/run-live-tests      |    2 +-
 gobject/run-tests           |    2 +-
 gobject/run-tests-retvalues |    2 +-
 lib/MAX_PROC_NR             |    2 +-
 m4/guestfs_ocaml.m4         |    8 +
 po-docs/cs.po               | 2570 ++++++++++++++++++++--------------------
 po-docs/de.po               | 2570 ++++++++++++++++++++--------------------
 po-docs/en_GB.po            | 2707 ++++++++++++++++++++++---------------------
 po-docs/es.po               | 2570 ++++++++++++++++++++--------------------
 po-docs/eu.po               | 2570 ++++++++++++++++++++--------------------
 po-docs/fr.po               | 2622 ++++++++++++++++++++---------------------
 po-docs/ja.po               | 2570 ++++++++++++++++++++--------------------
 po-docs/libguestfs-docs.pot | 2479 +++++++++++++++++++--------------------
 po-docs/nl.po               | 2570 ++++++++++++++++++++--------------------
 po-docs/pt_BR.po            | 2570 ++++++++++++++++++++--------------------
 po-docs/tg.po               | 2570 ++++++++++++++++++++--------------------
 po-docs/uk.po               | 2700 +++++++++++++++++++++---------------------
 po-docs/zh_CN.po            | 2570 ++++++++++++++++++++--------------------
 po/POTFILES                 |    7 +-
 po/ca.po                    |   67 +-
 po/de.po                    |   67 +-
 po/en_GB.po                 |   67 +-
 po/es.po                    |   70 +-
 po/eu.po                    |   67 +-
 po/fr.po                    |   70 +-
 po/gu.po                    |   67 +-
 po/hi.po                    |   67 +-
 po/ja.po                    |   70 +-
 po/kn.po                    |   67 +-
 po/libguestfs.pot           |   69 +-
 po/ml.po                    |   67 +-
 po/mr.po                    |   70 +-
 po/nl.po                    |   70 +-
 po/or.po                    |   67 +-
 po/pa.po                    |   70 +-
 po/pl.po                    |   70 +-
 po/pt_BR.po                 |   67 +-
 po/ru.po                    |   67 +-
 po/ta.po                    |   67 +-
 po/te.po                    |   67 +-
 po/tg.po                    |   67 +-
 po/uk.po                    |   70 +-
 po/zh_CN.po                 |   67 +-
 po/zh_TW.po                 |   67 +-
 52 files changed, 17727 insertions(+), 17728 deletions(-)
/var/tmp/tmpCmhm7s

Applying patches ...

/var/tmp/tmpCmhm7s/libguestfs /var/tmp/tmpCmhm7s
error: patch failed: generator/actions_core.ml:9646
error: generator/actions_core.ml: patch does not apply
error: patch failed: generator/proc_nr.ml:484
error: generator/proc_nr.ml: patch does not apply
error: patch failed: lib/MAX_PROC_NR:1
error: lib/MAX_PROC_NR: patch does not apply
Applying: New partition API: part_resize
Patch failed at 0001 New partition API: part_resize
The copy of the patch that failed is found in: .git/rebase-apply/patch
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am
--abort".

These emails are not real failures.  The commit went upstream just
before the test ran, so the test thought that the commit didn't apply
cleanly ...

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-top is 'top' for virtual machines.  Tiny program with many
powerful monitoring features, net stats, disk stats, logging, etc.
http://people.redhat.com/~rjones/virt-top