5b15e2ecaf
Notable changes:
* The only big change is the switch to using a custom QIOChannel for
savevm-async, because the previously used QEMUFileOps was dropped.
Changes to the current implementation:
* Switch to vector based methods as required for an IO channel. For
short reads the passed-in IO vector is stuffed with zeroes at the
end, just to be sure.
* For reading: The documentation in include/io/channel.h states that
at least one byte should be read, so also error out when whe are
at the very end instead of returning 0.
* For reading: Fix off-by-one error when request goes beyond end.
The wrong code piece was:
if ((pos + size) > maxlen) {
size = maxlen - pos - 1;
}
Previously, the last byte would not be read. It's actually
possible to get a snapshot .raw file that has content all the way
up the final 512 byte (= BDRV_SECTOR_SIZE) boundary without any
trailing zero bytes (I wrote a script to do it).
Luckily, it didn't cause a real issue, because qemu_loadvm_state()
is not interested in the final (i.e. QEMU_VM_VMDESCRIPTION)
section. The buffer for reading it is simply freed up afterwards
and the function will assume that it read the whole section, even
if that's not the case.
* For writing: Make use of the generated blk_pwritev() wrapper
instead of manually wrapping the coroutine to simplify and save a
few lines.
* Adapt to changed interfaces for blk_{pread,pwrite}:
* a9262f551e ("block: Change blk_{pread,pwrite}() param order")
* 3b35d4542c ("block: Add a 'flags' param to blk_pread()")
* bf5b16fa40 ("block: Make blk_{pread,pwrite}() return 0 on success")
Those changes especially affected the qemu-img dd patches, because
the context also changed, but also some of our block drivers used
the functions.
* Drop qemu-common.h include: it got renamed after essentially
everything was moved to other headers. The only remaining user I
could find for things dropped from the header between 7.0 and 7.1
was qemu_get_vm_name() in the iscsi-initiatorname patch, but it
already includes the header to which the function was moved.
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
62 lines
2.0 KiB
Diff
62 lines
2.0 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Stefan Reiter <s.reiter@proxmox.com>
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Date: Tue, 12 Jan 2021 14:12:20 +0100
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Subject: [PATCH] PVE: redirect stderr to journal when daemonized
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QEMU uses the logging for error messages usually, so LOG_ERR is most
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fitting.
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Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
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Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
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---
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meson.build | 2 ++
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os-posix.c | 7 +++++--
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2 files changed, 7 insertions(+), 2 deletions(-)
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diff --git a/meson.build b/meson.build
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index be4785e2f6..3fc7c8d435 100644
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--- a/meson.build
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+++ b/meson.build
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@@ -1463,6 +1463,7 @@ keyutils = dependency('libkeyutils', required: false,
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has_gettid = cc.has_function('gettid')
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libuuid = cc.find_library('uuid', required: true)
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+libsystemd = cc.find_library('systemd', required: true)
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libproxmox_backup_qemu = cc.find_library('proxmox_backup_qemu', required: true)
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# libselinux
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@@ -3105,6 +3106,7 @@ if have_block
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# os-posix.c contains POSIX-specific functions used by qemu-storage-daemon,
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# os-win32.c does not
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blockdev_ss.add(when: 'CONFIG_POSIX', if_true: files('os-posix.c'))
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+ blockdev_ss.add(when: 'CONFIG_POSIX', if_true: libsystemd)
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softmmu_ss.add(when: 'CONFIG_WIN32', if_true: [files('os-win32.c')])
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endif
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diff --git a/os-posix.c b/os-posix.c
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index 321fc4bd13..b1870d2690 100644
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--- a/os-posix.c
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+++ b/os-posix.c
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@@ -28,6 +28,8 @@
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#include <pwd.h>
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#include <grp.h>
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#include <libgen.h>
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+#include <systemd/sd-journal.h>
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+#include <syslog.h>
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/* Needed early for CONFIG_BSD etc. */
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#include "net/slirp.h"
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@@ -281,9 +283,10 @@ void os_setup_post(void)
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dup2(fd, 0);
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dup2(fd, 1);
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- /* In case -D is given do not redirect stderr to /dev/null */
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+ /* In case -D is given do not redirect stderr to journal */
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if (!qemu_log_enabled()) {
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- dup2(fd, 2);
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+ int journal_fd = sd_journal_stream_fd("QEMU", LOG_ERR, 0);
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+ dup2(journal_fd, 2);
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}
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close(fd);
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