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2012-09-19nbd: add nbd_export_get_blockdevPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-09-19nbd: register named exportsPaolo Bonzini
Add an API to register and find named exports. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-09-19nbd: add notification for closing an NBDExportPaolo Bonzini
In order to exit cleanly from qemu-nbd, add a callback that triggers when an NBDExport is closed. In the case of qemu-nbd it will exit the main loop. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-09-19nbd: add reference counting to NBDExportPaolo Bonzini
We will use a similar two-phase destruction for NBDExport, so we need each NBDClient to add a reference to NBDExport. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-09-19nbd: do not leak nbd_trip coroutines when a connection is torn downPaolo Bonzini
Because nbd_client_close removes the I/O handlers for the client socket, there is no way that any suspended coroutines are restarted. This will be a problem with the QEMU embedded NBD server, because we will have a QMP command to forcibly close all connections with the clients. Instead, we can exploit the reference counting of NBDClients; shutdown the client socket, which will make it readable and writeable. Also call the close callback, which will release the user's reference. The coroutines then will fail and exit cleanly, and release all remaining references, until the last refcount finally triggers the closure of the client. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-09-19nbd: make refcount interface publicPaolo Bonzini
After the next patch, the close callback will have to release its reference. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19nbd: consistently return negative errno valuesPaolo Bonzini
In the next patch we need to look at the return code of nbd_wr_sync. To avoid percolating the socket_error() ugliness all around, let's handle errors by returning negative errno values. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19nbd: consistently use ssize_tPaolo Bonzini
GCC (pedantically, but correctly) considers that a negative ssize_t may become positive when casted to int. This may cause uninitialized variable warnings when a function returns such a negative ssize_t and is inlined. Propagate ssize_t return types to avoid this. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22qemu-nbd: move client handling to nbd.cPaolo Bonzini
This patch sets up the fd handler in nbd.c instead of qemu-nbd.c. It introduces NBDClient, which wraps the arguments to nbd_trip in a single structure, so that we can add a notifier to it. This way, qemu-nbd can know about disconnections. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22qemu-nbd: introduce NBDExportPaolo Bonzini
Wrap the common parameters of nbd_trip and nbd_negotiate in a single opaque struct. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22qemu-nbd: remove data_size argument to nbd_tripPaolo Bonzini
The size of the buffer is in practice part of the protocol. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22qemu-nbd: remove offset argument to nbd_tripPaolo Bonzini
The argument is write-only. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-09-19nbd: sync API definitions with upstreamPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-09-19nbd: support feature negotiationPaolo Bonzini
nbd supports writing flags in bytes 24...27 of the header, and uses that for the read-only flag. Add support for it in qemu-nbd. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-09-12nbd: Clean up use of block_int.hMarkus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-09-09Fix include statements for qemu-common.hStefan Weil
* qemu-common.h is not a system include file, so it should be included with "" instead of <>. Otherwise incremental builds might fail because only local include files are checked for changes. * linux-user/syscall.c included the file twice. Cc: Riku Voipio <riku.voipio@iki.fi> Cc: Jan Kiszka <jan.kiszka@siemens.com> Acked-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Stefan Weil <weil@mail.berlios.de> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-09-03Use new macro QEMU_PACKED for packed structuresStefan Weil
Most changes were made using these commands: git grep -la '__attribute__((packed))'|xargs perl -pi -e 's/__attribute__\(\(packed\)\)/QEMU_PACKED/' git grep -la '__attribute__ ((packed))'|xargs perl -pi -e 's/__attribute__ \(\(packed\)\)/QEMU_PACKED/' git grep -la '__attribute__((__packed__))'|xargs perl -pi -e 's/__attribute__\(\(__packed__\)\)/QEMU_PACKED/' git grep -la '__attribute__ ((__packed__))'|xargs perl -pi -e 's/__attribute__ \(\(__packed__\)\)/QEMU_PACKED/' git grep -la '__attribute((packed))'|xargs perl -pi -e 's/__attribute\(\(packed\)\)/QEMU_PACKED/' Whitespace in linux-user/syscall_defs.h was fixed manually to avoid warnings from scripts/checkpatch.pl. Manual changes were also applied to hw/pc.c. I did not fix indentation with tabs in block/vvfat.c. The patch will show 4 errors with scripts/checkpatch.pl. Signed-off-by: Stefan Weil <weil@mail.berlios.de> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-04-07NBD: Use qemu_socket functions to open TCP and UNIX socketsNick Thomas
This commit has the side-effect of making the qemu-nbd binary capable of binding to IPv6 addresses. ("-b ::1", for instance). block/nbd.c fails to parse IPv6 IP addresses correctly at this point, but will work over IPv6 when given a hostname. It still works over IPv4 as before. We move the qemu-sockets object from the 'common' to the 'block' list in the Makefile. The common list includes the block list, so this is effectively a no-op for the rest of the code. We also add 32-bit 'magic' attributes to nbd_(request|reply) to facilitate calculating maximum request/response sizes later. Signed-off-by: Nick Thomas <nick@bytemark.co.uk> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-09-08Merge remote branch 'kwolf/for-anthony' into stagingAnthony Liguori
2010-09-04Remove unused argument for nbd_client()Jes Sorensen
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-08-30nbd: Introduce NBD named exports.Laurent Vivier
This patch allows to connect Qemu using NBD protocol to an nbd-server using named exports. For instance, if on the host "isoserver", in /etc/nbd-server/config, you have: [generic] [debian-500-ppc-netinst] exportname = /ISO/debian-500-powerpc-netinst.iso [Fedora-10-ppc-netinst] exportname = /ISO/Fedora-10-ppc-netinst.iso You can connect to it, using: qemu -cdrom nbd:isoserver:exportname=debian-500-ppc-netinst qemu -cdrom nbd:isoserver:exportname=Fedora-10-ppc-netinst NOTE: you need at least nbd-server 2.9.18 Signed-off-by: Laurent Vivier <laurent@vivier.eu> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-06-13Move stdbool.hPaul Brook
Move inclusion of stdbool.h to common header files, instead of including in an ad-hoc manner. Signed-off-by: Paul Brook <paul@codesourcery.com>
2009-07-16Update to a hopefully more future proof FSF addressBlue Swirl
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2009-01-04Update FSF address in GPL/LGPL boilerplateaurel32
The attached patch updates the FSF address in the GPL/LGPL boilerplate in most GPL/LGPLed files, and also in COPYING.LIB. Signed-off-by: Stuart Brady <stuart.brady@gmail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6162 c046a42c-6fe2-441c-8c8c-71466251a162
2008-09-10qemu-nbd: remove useless parameter from nbd_negotiate() (Laurent Vivier)aliguori
This patch removes "BlockDriverState *bs" from nbd_negotiate() because it is not used. Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.fr> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5186 c046a42c-6fe2-441c-8c8c-71466251a162
2008-07-03Allow QEMU to connect directly to an NBD server, by Laurent Vivier.ths
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4838 c046a42c-6fe2-441c-8c8c-71466251a162
2008-07-03Add a parameter to disable host cache, by Laurent Vivier.ths
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4836 c046a42c-6fe2-441c-8c8c-71466251a162
2008-07-03Merge NBD client/server, by Laurent Vivier.ths
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4834 c046a42c-6fe2-441c-8c8c-71466251a162
2008-05-27qemu-nbd tool (Anthony Liguori)bellard
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4596 c046a42c-6fe2-441c-8c8c-71466251a162
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