[Libguestfs] [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