similar to: Re: [libguestfs/nbdkit] Floppy plugin seems to be broken (#6)

While I was thinking about what I'd write for my proposed nbdkit talk at FOSDEM next year, this strikes me as clunky: rm -f /tmp/sock nbdkit -U /tmp/sock file foo nbd-client -u /tmp/sock /dev/nbd0 ... nbd-client -d /dev/nbd0 killall nbdkit In qemu-nbd, all that is just this: qemu-nbd -c /dev/nbd0 foo It seems like it would be nice to implement an ‘nbdkit -c

(This email is largely me just thinking aloud ... So ideas welcome!) For the RISC-V builders (http://fedora.riscv.rocks) I'm using an NBD disk to host the heavily used /var/lib/mock build directory. This is because the build machines have only SD-cards as local disk and SD is both slow and unreliable. The builders (NBD clients) are set up with an /etc/rc.d/rc.local file which runs these

On Sat, Nov 07, 2015 at 12:21:29AM -0600, Jason Pepas wrote: > Hi, > > So I've been hacking together an nbdkit plugin (similar to the "file" > plugin, but it splits the file up into chunks): > https://github.com/pepaslabs/nbdkit-chunks-plugin > > I got it to the point of being a working prototype. Then I threw it > onto a raspberry pi, which it turns out

Hi, So I've been hacking together an nbdkit plugin (similar to the "file" plugin, but it splits the file up into chunks): https://github.com/pepaslabs/nbdkit-chunks-plugin I got it to the point of being a working prototype. Then I threw it onto a raspberry pi, which it turns out only has a 50/50 shot of fallocate() working correctly. I'm checking the return code of

On 10/30/18 11:42 AM, Richard W.M. Jones wrote: > >>> + errno = 0; >>> + while ((d = readdir (DIR)) != NULL) { >>> + if (strcmp (d->d_name, ".") == 0 || >>> + strcmp (d->d_name, "..") == 0) >>> + continue; strcmp() leaves errno alone (well, POSIX doesn't guarantee that, but no sane implementation of

On Tue, Oct 30, 2018 at 09:12:55AM -0500, Eric Blake wrote: > >+/* Used for dealing with VFAT LFNs when creating a directory. */ > >+struct lfn { > >+ const char *name; /* Original Unix filename. */ > >+ char short_base[8]; /* Short basename. */ > >+ char short_ext[3]; /* Short file extension. */ > >+ char *lfn;

On 4/15/20 11:16 AM, Richard W.M. Jones wrote: > These plugins have in common that they store either a list of > allocated strings or a list of constant strings. Define either > string_vector or const_string_vector as appropriate and use it to > store these lists. > --- The commit message mentions strings... > +++ b/plugins/floppy/virtual-floppy.h > @@ -37,6 +37,7 @@ >

On 10/28/18 5:13 AM, Richard W.M. Jones wrote: > Create a virtual FAT-formatted floppy disk from a directory of files. > > For example: > > nbdkit floppy /path/to/directory > > The implementation of this is quite different from nbdkit-iso-plugin > since we cannot use an external program. Instead this plugin > synthesizes the MBR partition and FAT32 structures that

These plugins have in common that they store either a list of allocated strings or a list of constant strings. Define either string_vector or const_string_vector as appropriate and use it to store these lists. --- plugins/iso/Makefile.am | 1 + plugins/split/Makefile.am | 1 + plugins/floppy/virtual-floppy.h | 7 +++-- plugins/floppy/directory-lfn.c | 35 +++++++++-------------

This can be used for creating temporary disks to thin clients, as a kind of "remote tmpfs". See also: https://www.redhat.com/archives/libguestfs/2020-March/msg00134.html --- plugins/data/nbdkit-data-plugin.pod | 1 + plugins/file/nbdkit-file-plugin.pod | 1 + plugins/linuxdisk/nbdkit-linuxdisk-plugin.pod | 7 +- plugins/memory/nbdkit-memory-plugin.pod |

Unfinished (needs tests). This is my attempt to make a "remote tmpfs" plugin as outlined in this prior email: https://www.redhat.com/archives/libguestfs/2020-March/msg00134.html Although it would be possible to construct something a bit like this using existing plugins and filters (perhaps with some new features in those filters) I think it may be nicer to have a dedicated plugin for

On Mon, 15 Oct 2018, Nir Soffer wrote: > On Sat, Oct 13, 2018 at 9:45 PM Eric Wheeler <nbd@lists.ewheeler.net> wrote: > Hello all, > > It might be neat to attach ISOs to KVM guests via websockets.  Basically > the  browser would be the NBD "server" and an NBD client would run on the > hypervisor, then use `virsh change-media vm1 hdc

I am looking up a number based upon a randomly selected number and then proceed to the rest of my code if the corresponding value is greater than or equal to yet another value. so if Dev_Size = 14 and my randomly selected number is 102 and i am looking up 102 in the following table 100 21 101 4 102 9 103 52 104 29 So i select the the corresponding value of 102, which is 9 and

Create a virtual FAT-formatted floppy disk from a directory of files. For example: nbdkit floppy /path/to/directory The implementation of this is quite different from nbdkit-iso-plugin since we cannot use an external program. Instead this plugin synthesizes the MBR partition and FAT32 structures that are required. To do: Implement bootable virtual floppy using syslinux. This is not

On Thu, May 28, 2020 at 12:24:22AM +0000, Eric Wheeler wrote: > On Mon, 15 Oct 2018, Nir Soffer wrote: > > On Sat, Oct 13, 2018 at 9:45 PM Eric Wheeler <nbd@lists.ewheeler.net> wrote: > > Hello all, > > > > It might be neat to attach ISOs to KVM guests via websockets.  Basically > > the  browser would be the NBD "server" and an

[adding nbdkit readers] On 10/13/18 1:39 PM, Eric Wheeler wrote: > Hello all, > > It might be neat to attach ISOs to KVM guests via websockets. Basically > the browser would be the NBD "server" and an NBD client would run on the > hypervisor, then use `virsh change-media vm1 hdc --insert /dev/nbd0` could > use an ISO from my desk to boot from. Are you using qemu as

v2 was here: https://www.redhat.com/archives/libguestfs/2020-March/msg00154.html v3: - Micro-optimize tmpdir. - Quote $disk in default command shell fragment. - Don't redirect mkfs output to /dev/null. Instead use exec </dev/null >/dev/null before the shell fragment. We may want to do this in other places where we run external shell scripts, or more generally for all

What i thought was a simple process isnt working for me. After i create an multiple objects in a function (see below), how to i use those objects later in the program. I tried calling the function again and then the object i wanted and it worked the first time but now it doesnt( i think i defined the object outside the function accidently so then it worked but when run properly it doesnt). I

On Thu, 28 May 2020, Richard W.M. Jones wrote: > On Thu, May 28, 2020 at 12:24:22AM +0000, Eric Wheeler wrote: > > On Mon, 15 Oct 2018, Nir Soffer wrote: > > > On Sat, Oct 13, 2018 at 9:45 PM Eric Wheeler <nbd@lists.ewheeler.net> wrote: > > > Hello all, > > > > > > It might be neat to attach ISOs to KVM guests via websockets. 

I’m pleased to announce the next stable release of nbdkit. NBD — Network Block Device — is a protocol for accessing Block Devices (hard disks and disk-like things) over a Network. nbdkit is a toolkit for creating NBD servers. The key features are: * Multithreaded NBD server written in C with good performance. * Minimal dependencies for the basic server. * Liberal license (BSD) allows nbdkit