Since the recent build error caused by mismatch of symbol types due to
missing declarations, build libxl with -Wmissing-declarations.
The patch is mostly straightforward, a one liner in the makefile enables
the flag, a lot of functions in xl_cmdimpl.c needed to be made static
and libxl_paths.c needed to include libxl.h.
The one wart on the patch-set is that flex has a bug where it emits code
with missing declarations for yy(set|get)_column. This can be worked
around by providing the declarations ourselves regardless.
Signed-off-by: Gianni Tedesco <gianni.tedesco@citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
These are left behind when the datastructures move to _lixl_types.hg
in a following patch and moving them first makes that pure code motion
patch more obviously correct.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
committer: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
libxenlight exports a function libxl_uuid2string which is used
internally in several places but has one external caller in xl.
This means that libxl internal callers leak since they were not
expecting to have to free() the UUID since the per-api-call-gc-lifetime
patch.
Convert libxl_uuid2string to be an internal function which participates
in the callers garbage collection. Eliminate string_of_uuid() macro in
favour of "format" and "arguments" macros suitable for printf()-like
functions which are made part of the libxl API and fix-up xl callers to
use that to avoid code duplication and enhance readability.
Signed-off-by: Gianni Tedesco <gianni.tedesco@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
committer: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
libxl_free() allows allocated memory to be explicitly free'd from a
libxl_gc. Every previous use of this function has now been made
redundant and therefore has been removed. We can safely kill it and
amend the policy accordingly.
Signed-off-by: Gianni Tedesco <gianni.tedesco@citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
fix invalid free segfault and use-after-free in libxl_device_disk_list()
Gah, libxl_device_disk_list() is returning a lot of pointers to free'd
data. Fix that by replacing libxl_xs_read() with xs_read() in line with
the policy.
Also fix a segfault caused by an erroneous free of the last disk-list
array element rather than the first one. This was causing xl create to
segfault when using the new qemu-dm code-base. Fix that and add a
comment about the fact that this libxl API requires a corresponding
libxl_device_disk_free() function.
Signed-off-by: Gianni Tedesco <gianni.tedesco@citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Pv qemu provides backends for vfbs and consoles; even if no vfbs are
given can still be useful for the console backends.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
This patch implements the new protocol for handling pv consoles and
emulated serials as described in the document docs/misc/console.txt.
The changes are:
- xenconsoled: do not write the pty under serial in xenstore if
xenconsoled is handling a consolepath;
- xenconsole: implement support for an explicit console type parameter;
the parameter can be "pv", to specify that the user wants to
connect to a pv console, or "serial", to specify that the user wants to
connect to an emulated serial. If the type parameter hasn't been
specified be the user, xenconsole tries to guess which type of console
it has to connect to, defaulting to pv console for pv guests and
emulated serial for hvm guests.
- xenconsole: use the new xenstore paths;
- libxl: rename libxl_console_constype to libxl_console_consback:
constype is used to to specify whether qemu or xenconsoled provides the
backend, so I renamed it to libxl_console_consback to make it more
obvious that we are talking about backends;
- libxl: add a new libxl_console_constype to specify if the console is
an emulated serial or a pv console;
- libxl: support the new xenconsole "type" command line parameter;
- libxl: use the "output" node under console in xenstore to tell qemu
where do we want the output of this pv console to go;
- remove the legacy "serialpath" from xenconsoled altogether
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Also: update the QEMU_TAG to pull in the qemu part of these changes.
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
This is going to be used by libxl_console_add in the next patch to
avoid creating the device/console path on xenstore for console 0.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
After animated discussion with several libxl developers we seem to have
agreed on a policy for memory management within libxenlight. These
comments document the policy which is mostly implemented since
21977:51147d5b17c3 but some aspects (comments, function naming) are
guidelines to be followed in future functionality and perhaps to be
implemented by search/replace in future patches.
The document is mostly authored by Ian Jackson but with modifications to
reflect the slightly different functionality that has been implemented
since this was proposed.
Signed-off-by: Gianni Tedesco <gianni.tedesco@citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
It has been unused since 21732:eb34666befcc.
Removing the include of sys/ptrace.h and threaddb.h exposed a few
places which were using time(2) or gettimeofday(2) without including
time.h or sys/time.h respectively and were relying on an include.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Currently scratch variables allocated by libxl have the same lifetime as
the context. While this is suitable for one off invocations of xl. It is
not so great for a daemon process linking to libxl. In that case there
will be prolific leakage of heap memory.
My proposed solution involves create a new libxl_gc structure, which
contains a pointer to an owning context as well as the garbage
collection data. Top-level library functions which expect to do a lot of
scratch allocations put gc struct on the stack and initialize it with a
macro. Before returning they then call libxl_free_all on this struct.
This means that static helper functions called by such functions will
usually take a gc instead of a ctx as a first parameter.
The patch touches almost every code-path so a close review and testing
would be much appreciated. I have tested with valgrind all of the parts
I could which looked non-straightforward. Suffice to say that it seems
crash-free even if we have exposed a few real memory leaks. These are
for cases where we return eg. block list to an xl caller but there is no
appropriate block_list_free() function to call. Ian Campbells work in
this area should sew up all these loose ends.
Signed-off-by: Gianni Tedesco <gianni.tedesco@citrix.com>
committer: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Linker command lines are order-sensitive.
Move linker options -Lfoo -lfoo from LDFLAGS to LDLIBS and place this new
variable after the objects to link. This resolves build errors in xenpagin
and blktap with recent toolchains.
rename SHLIB_CFLAGS to SHLIB_LDFLAGS
rename LDFLAGS_* to LDLIBS_*
move LDFLAGS usage after CFLAGS in CC calls
remove stale comments in xenpaging Makefile
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
This also fixes a bug with an erroneous call to libxl_free().
A destructor for the vcpu list is also implemented which is called from
xl.
Signed-off-by: Gianni Tedesco <gianni.tedesco@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
This kills off about 1,000 PLT entries speeding up link time and shaving about
1-2KB off of binary size. It also prevents users of the library erroneously
calling libxl internal functions.
Signed-off-by: Gianni Tedesco <gianni.tedesco@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
libxl_poolid_to_name has in-and-out-of-library callers. In library callers now use
_libxl_poolid_to_name() which participates in garbage collection and
out-of-library callers are fixed up to free() the domain name.
Signed-off-by: Gianni Tedesco <gianni.tedesco@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
libxl_domid_to_name has numerous in-and-out-of-library callers. In
library callers now use _libxl_domid_to_name() which participates in
garbage collection and out-of-library callers are fixed up to free() the
domain name.
Signed-off-by: Gianni Tedesco <gianni.tedesco@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
This also fixes a bug with an erroneous call to libxl_free().
A destructor for the nic list is also implemented which is called from
xl.
Signed-off-by: Gianni Tedesco <gianni.tedesco@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
libxl_strdup() will soon have a per-call rather than per-context lifetime so
use strdup() to allocate version info and manually free in context destructor
Signed-off-by: Gianni Tedesco <gianni.tedesco@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Also abort() if a pointer passed in to libxl_free() cannot be found in the
mini-gc structures. This exposes several real bugs (ie. not just the
libxl_free() something that was allocated via malloc variety).
Signed-off-by: Gianni Tedesco <gianni.tedesco@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
xc_vcpu_[sg]etaffinity require the number of _bytes_ needed for
holding a CPU map, not the number of bits. Fix this when
calling the function from libxl and rename the misleading variable
name to avoid future confusion.
Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Implement PCI pass-through for multi-function devices. The supported BDF
notation is: BB:DD.* - therefore passing-through a subset of functions or
remapping the function numbers is not supported except for when passing
through a single function which will be a virtual function 0.
Letting qemu automatically select the virtual slot is not supported in
multi-function passthrough since the qemu-dm protocol can not actually
handle that case.
Also fix format error in xl pci-list-assignable.
Signed-off-by: Gianni Tedesco <gianni.tedesco@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Allow specification of backend domains for vifs, either in the config
file or via network-attach.
Signed-off-by: Mihir Nanavati <mihirn@cs.ubc.ca>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
The error message when one wants to list a non-existent domain is at
best misleading (libxl_domain_info failed (code -5)).
This patch catches this specific error and tells the user that the
requested domain does not exist:
Error: Domain '42' does not exist.
Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
From: Anthony PERARD <anthony.perard@citrix.com>
This patch adds a second argument to vif-bridge script. It can be "vif"
or "tap". "vif" give the default behavior and "tap" just add the
interface to the found bridge when the action is "add".
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
---
tools/hotplug/Linux/vif-bridge | 20 ++++++---
tools/hotplug/Linux/vif-common.sh | 70 ++++++++++++++++++++++++---------
tools/hotplug/Linux/xen-backend.rules | 5 +-
tools/libxl/libxl.c | 6 +-
4 files changed, 70 insertions(+), 31 deletions(-)
From: Anthony PERARD <anthony.perard@citrix.com>
This patch adds a function to check the version of the device model.
Depending on the version of the DM, the command line arguments will be
built differently.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
---
tools/libxl/libxl.c | 160 ++++++++++++++++++++++++++++++++++++++++++++-
tools/libxl/libxl_utils.c | 78 ++++++++++++++++++++++
tools/libxl/libxl_utils.h | 6 ++
3 files changed, 243 insertions(+), 1 deletions(-)
From: Anthony PERARD <anthony.perard@citrix.com>
Currently, tap device names for a domain begin at tap42.-1, but it must
be tap42.0.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
---
tools/libxl/libxl.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
Creates a shared memory ring buffer and event channel in HVM domains
for passing debug messages from PV drivers on HVM guests
The console is used by windows pv drivers to send debug data to xenconsoled
Signed-off-by: Owen Smith <owen.smith@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Fixes these valgrind reported leaks, found with "valgrind xl create -n ..."
==21170== 8 bytes in 3 blocks are definitely lost in loss record 1 of 3
==21170== at 0x4022F0A: malloc (vg_replace_malloc.c:236)
==21170== by 0x411B22F: strdup (in /lib/i686/cmov/libc-2.7.so)
==21170== by 0x4030085: xlu__cfgl_strdup (libxlu_cfg.c:290)
==21170== by 0x402F3C4: xlu__cfg_yylex (libxlu_cfg_l.l:37)
==21170== by 0x402DD86: xlu__cfg_yyparse (libxlu_cfg_y.c:1338)
==21170== by 0x40308AE: xlu_cfg_readdata (libxlu_cfg.c:85)
==21170== by 0x804DBE4: parse_config_data (xl_cmdimpl.c:591)
==21170== by 0x8056EE4: create_domain (xl_cmdimpl.c:1381)
==21170== by 0x80582AE: main_create (xl_cmdimpl.c:3178)
==21170== by 0x804B54B: main (xl.c:76)
==21170==
==21170== 57 bytes in 2 blocks are definitely lost in loss record 2 of 3
==21170== at 0x4022F0A: malloc (vg_replace_malloc.c:236)
==21170== by 0x402FE22: xlu__cfgl_dequote (libxlu_cfg.c:307)
==21170== by 0x402F4B4: xlu__cfg_yylex (libxlu_cfg_l.l:52)
==21170== by 0x402DD86: xlu__cfg_yyparse (libxlu_cfg_y.c:1338)
==21170== by 0x40308AE: xlu_cfg_readdata (libxlu_cfg.c:85)
==21170== by 0x804DBE4: parse_config_data (xl_cmdimpl.c:591)
==21170== by 0x8056EE4: create_domain (xl_cmdimpl.c:1381)
==21170== by 0x80582AE: main_create (xl_cmdimpl.c:3178)
==21170== by 0x804B54B: main (xl.c:76)
==21170==
==21170== 111 bytes in 6 blocks are definitely lost in loss record 3 of 3
==21170== at 0x4022F0A: malloc (vg_replace_malloc.c:236)
==21170== by 0x402FE22: xlu__cfgl_dequote (libxlu_cfg.c:307)
==21170== by 0x402F4ED: xlu__cfg_yylex (libxlu_cfg_l.l:56)
==21170== by 0x402DD86: xlu__cfg_yyparse (libxlu_cfg_y.c:1338)
==21170== by 0x40308AE: xlu_cfg_readdata (libxlu_cfg.c:85)
==21170== by 0x804DBE4: parse_config_data (xl_cmdimpl.c:591)
==21170== by 0x8056EE4: create_domain (xl_cmdimpl.c:1381)
==21170== by 0x80582AE: main_create (xl_cmdimpl.c:3178)
==21170== by 0x804B54B: main (xl.c:76)
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
NOTE: This functionality depends on a corresponding qemu-dm patch to work as
expected. Should be safe to use with an un-patched qemu-dm as before.
libxl_wait_for_device_model can only wait for one status value, re-work the
API so that a callback function can chose between several different possible
status values for qemu-dm and fix up all callers appropriately.
In the case of PCI device insert we succeed if qemu-dm reports
"pci-device-inserted" and error out instead of hanging forever if it fails
since qemu-dm now reports a status of "pci-insert-failed".
Signed-off-by: Gianni Tedesco <gianni.tedesco@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Move to state-machine parser for PCI BDF's now that the number of possible
sscanf expressions is sufficiently large to make it worth it. Also implement
parsing of virtual PCI slot numbers.
Signed-off-by: Gianni Tedesco <gianni.tedesco@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Gianni Tedesco
Ian Jackson
Ian Campbell
"Jiang, Yunhong"
Stefano Stabellini
Christoph Egger
Stefano Stabellini
Andre Przywara
Anthony Perard
Juergen Gross
Ian Campbell