search for: guestfs_debug

...ot >> require anything to exists on partition. >> >> In API I found only the 'command' command which requires the >> partition to be mounted and have kernel image on it. This cannot >> operate on empty or non-mounted partition. > You probably want to use the guestfs_debug API, ie: > > char *cmd[] = { "resize2fs", "-P", ..., NULL }; > char *ret = guestfs_debug (g, "sh", cmd); Yeah! This is just what I was looking for. Thank you :-) > It's better to add a new API however, and not difficult either: > > http:/...

Hello everyone! I am working on resizing qcow2 images using virt-resize+liguestfs. E.g. I when shrinking a partition, I have to resize filesystem using resize2fs-size. The problem is that I cannot find out minimal partition size (aka resize2fs -P). The only way is calling "resize2fs-size 1K", wait for resize2fs to claim "resize2fs: New size smaller than minimum (510050)"

I'm planning on tweaking the language callbacks to support fua; first up is the python bindings. I want to move from: def zero(h, count, offset, may_trim): to a nicer: def zero(h, count, offset, may_trim=False, fua=False): where the C code passes keywords for the flags (we can add new flags as needed), perhaps by using introspection to learn whether the plugin has a mandatory may_trim

...run by daemon and do not > require anything to exists on partition. > > In API I found only the 'command' command which requires the > partition to be mounted and have kernel image on it. This cannot > operate on empty or non-mounted partition. You probably want to use the guestfs_debug API, ie: char *cmd[] = { "resize2fs", "-P", ..., NULL }; char *ret = guestfs_debug (g, "sh", cmd); It's better to add a new API however, and not difficult either: http://libguestfs.org/guestfs.3.html#adding-a-new-api-action Rich. -- Richard Jones, Virtu...

...he plugin's zero callback. Recent Linux kernels are now smart enough to turn fallocate(2) with FALLOC_FL_ZERO_RANGE into a SCSI WRITE SAME request, which qemu in turn converts into an NBD_CMD_WRITE_ZEROES. Since libguestfs does not directly have an API for this, we have to use the backdoor of guestfs_debug and fallocate(1). But inspecting logs such as tests/test-python.log, this change DOES prove that we got a client request for write zeroes, and that the fallback to pwrite due to test.py lacking a zero callback works. Signed-off-by: Eric Blake <eblake@redhat.com> --- tests/test-lang-plugins...

Depends on the previous 5 patches that modified virt-rescue to work without direct mode: https://www.redhat.com/archives/libguestfs/2017-March/msg00017.html Rich.

...06,19 @@ resolve_fstab_device_diskbyid (guestfs_h *g, const char *part, return 0; } +static bool +dev_mapper_exists (guestfs_h *g, const char *device) +{ + CLEANUP_FREE char *ret = NULL; + const char *const args[] = { device, NULL }; + + guestfs_push_error_handler (g, NULL, NULL); + ret = guestfs_debug (g, "exists", (char **) args); + guestfs_pop_error_handler (g); + + return ret && ret[0] != 0; +} + /* Resolve block device name to the libguestfs device name, eg. * /dev/xvdb1 => /dev/vdb1; and /dev/mapper/VG-LV => /dev/VG/LV. This * assumes that disks were added in...

Hi Richard, Is there a way I can access the /var/log/syslog of an running guestmount instance to get the grep ntfs-3g /var/log/syslog information? I managed to get the plug-in to load in my questmount instances by using: echo '/usr/lib/x86_64-linux-gnu/ntfs-3g/ntfs-plugin-*.so' > /usr/lib/guestfs/supermin.d/zz-ntfs-plugins rm -rf /var/tmp/.guestfs-* Kind regards, Jelle de Jong

Is there any sample code available to demonstrate the use of the guestfs_hivex_node_set_value API? I have no problem traversing and reading keys using libguestfs hivex wrappers - but continue to fail on any write attempts. The return is always -1 and errno is unchanged. I've set the environment variable HIVEX_DEBUG to 1 on a chance that this may help - but it doesn't. The only sample I

The existing mechanism was clunky, slow and used ~ 10 MB of local disk. Rich.

This supersedes the two previous patch series: https://www.redhat.com/archives/libguestfs/2017-March/msg00017.html https://www.redhat.com/archives/libguestfs/2017-March/msg00046.html Rich.

In libguestfs we have a few tests that require root privileges and they are skipped by default (normally you should not build or test as root), but you can do this to run them: sudo make check-root In nbdkit I wanted to check that the file plugin works with block devices (this is not tested), and the only way I can sensibly think to do this is using a loopback device and root. This commit

v1 was here: https://www.redhat.com/archives/libguestfs/2018-November/msg00147.html v2 was here: https://www.redhat.com/archives/libguestfs/2018-November/msg00152.html v3: - Use optarg != NULL as a sentinel for has_arg. - Moved some variable decls into the inner loop. - Make nbdkit wrapper depend on config.status, so if srcdir or builddir changes then we rebuild the wrapper. It

Version 3: - Tidies up the code further. - Implements correct handling of SIGTSTP and SIGCONT. - Adds: ^] s - sync filesystems - Adds: ^] z - suspend virt-rescue Rich.

Hi, this patch series improves the way /usr filesystems are handled: tag them appropriately, so later on we can find them and merge results they contain directly back for the root filesystem. The series includes also a new private debug API, and its usage to fix the resolution of /dev/mapper/.. devices found in fstab; without it, LVM /usr filesystems are not recognized as belonging to their

...name = "debug"; style = RString "result", [String "subcmd"; StringList "extraargs"], []; proc_nr = Some 76; - in_docs = false; + visibility = VDebug; shortdesc = "debugging and internals"; longdesc = "\ The C<guestfs_debug> command exposes some internals of @@ -6825,7 +6830,7 @@ yourself (Augeas support makes this relatively easy)." }; name = "internal_lstatlist"; style = RStructList ("statbufs", "stat"), [Pathname "path"; StringList "names"], [];...

...ter type ../src/guestfs.h:492: note: expected 'char * const*' but argument is of type 'const char **' com_redhat_et_libguestfs_GuestFS.c: In function 'Java_com_redhat_et_libguestfs_GuestFS__1debug': com_redhat_et_libguestfs_GuestFS.c:3619: warning: passing argument 3 of 'guestfs_debug' from incompatible pointer type ../src/guestfs.h:503: note: expected 'char * const*' but argument is of type 'const char **' com_redhat_et_libguestfs_GuestFS.c: In function 'Java_com_redhat_et_libguestfs_GuestFS__1vg_1activate': com_redhat_et_libguestfs_GuestFS.c:4205: w...

...ter type ../src/guestfs.h:492: note: expected 'char * const*' but argument is of type 'const char **' com_redhat_et_libguestfs_GuestFS.c: In function 'Java_com_redhat_et_libguestfs_GuestFS__1debug': com_redhat_et_libguestfs_GuestFS.c:3694: warning: passing argument 3 of 'guestfs_debug' from incompatible pointer type ../src/guestfs.h:503: note: expected 'char * const*' but argument is of type 'const char **' com_redhat_et_libguestfs_GuestFS.c: In function 'Java_com_redhat_et_libguestfs_GuestFS__1vg_1activate': com_redhat_et_libguestfs_GuestFS.c:4280: w...

...ter type ../src/guestfs.h:492: note: expected 'char * const*' but argument is of type 'const char **' com_redhat_et_libguestfs_GuestFS.c: In function 'Java_com_redhat_et_libguestfs_GuestFS__1debug': com_redhat_et_libguestfs_GuestFS.c:3619: warning: passing argument 3 of 'guestfs_debug' from incompatible pointer type ../src/guestfs.h:503: note: expected 'char * const*' but argument is of type 'const char **' com_redhat_et_libguestfs_GuestFS.c: In function 'Java_com_redhat_et_libguestfs_GuestFS__1vg_1activate': com_redhat_et_libguestfs_GuestFS.c:4205: w...

...ype ../src/guestfs.h:492:15: note: expected 'char * const*' but argument is of type 'const char **' com_redhat_et_libguestfs_GuestFS.c: In function 'Java_com_redhat_et_libguestfs_GuestFS__1debug': com_redhat_et_libguestfs_GuestFS.c:3619:3: warning: passing argument 3 of 'guestfs_debug' from incompatible pointer type ../src/guestfs.h:503:14: note: expected 'char * const*' but argument is of type 'const char **' com_redhat_et_libguestfs_GuestFS.c: In function 'Java_com_redhat_et_libguestfs_GuestFS__1vg_1activate': com_redhat_et_libguestfs_GuestFS.c:4205...