mirror of https://github.com/xemu-project/xemu.git
Administrative changes only:
* Deprecate 9p 'proxy' backend. * Raise status of 9p to 'Maintained'. -----BEGIN PGP SIGNATURE----- iQJLBAABCgA1FiEEltjREM96+AhPiFkBNMK1h2Wkc5UFAmSmkAsXHHFlbXVfb3Nz QGNydWRlYnl0ZS5jb20ACgkQNMK1h2Wkc5We1xAAol+HbhQ2zNCJUbZ2/WY3Jf0H K86DRQIs6w6UkL9msFz+id+tR5i50HoJ3+RnOKvy/fPqO8Rv6mb0d9r+bIG1JJCc ubHP91x/nyDbP0XbLMtmtCz/T4g67E11Qqriq7lH1bPF7ccU3iXHZNup9HARjOoE SQo9x4e7IDi1WdmM2vjvRXCh4ZLIlBv7c+2vAeP4V7FhJhDkL+1y+w6aCFw0xpd8 lto3Egnhz6pk7+SJfQwCl3rfozHhCxlNmcNa+7vqckVFpdJrvtKOQB4cn9yVDPr/ WjmYoB2J3MwYuZz+qAkdRJ6dUTLJb87YqJJe6lcKq0lqjiFBk7TccvIN9WgyJQd/ eLUPCCyo98g9RCaPzjLc4MgbpCPCmqJkg8A1vJzykvq51BqJZcdkwfJ7LFmsvTSo IfR1Seq4OUUzTZ2gWh8wJBNcPpAbilHzQnumxBEupe0Dg/pwoQWCywTYJN6Yf/6+ PzcK39bVFKrEyc4Z1Y/yXvAzD7nX8X78kSHvxYYEQfzruLIVQjUUQ7Mp3TiJvljk mLdcYqavjawgC2zmZU4L2Lx4Su7iVIkhNWj57WkfooSzLrAjueYQIJEltAt8Qmn6 x3+u3xI/myNKujMpaqgTAU5Gk2J2UApshq5Zwe8HpnVwWoxS3QetXdA/f4AXwZOk TpnKPYQa7edPLSSAbAs= =GzjR -----END PGP SIGNATURE----- Merge tag 'pull-9p-20230706' of https://github.com/cschoenebeck/qemu into staging Administrative changes only: * Deprecate 9p 'proxy' backend. * Raise status of 9p to 'Maintained'. # -----BEGIN PGP SIGNATURE----- # # iQJLBAABCgA1FiEEltjREM96+AhPiFkBNMK1h2Wkc5UFAmSmkAsXHHFlbXVfb3Nz # QGNydWRlYnl0ZS5jb20ACgkQNMK1h2Wkc5We1xAAol+HbhQ2zNCJUbZ2/WY3Jf0H # K86DRQIs6w6UkL9msFz+id+tR5i50HoJ3+RnOKvy/fPqO8Rv6mb0d9r+bIG1JJCc # ubHP91x/nyDbP0XbLMtmtCz/T4g67E11Qqriq7lH1bPF7ccU3iXHZNup9HARjOoE # SQo9x4e7IDi1WdmM2vjvRXCh4ZLIlBv7c+2vAeP4V7FhJhDkL+1y+w6aCFw0xpd8 # lto3Egnhz6pk7+SJfQwCl3rfozHhCxlNmcNa+7vqckVFpdJrvtKOQB4cn9yVDPr/ # WjmYoB2J3MwYuZz+qAkdRJ6dUTLJb87YqJJe6lcKq0lqjiFBk7TccvIN9WgyJQd/ # eLUPCCyo98g9RCaPzjLc4MgbpCPCmqJkg8A1vJzykvq51BqJZcdkwfJ7LFmsvTSo # IfR1Seq4OUUzTZ2gWh8wJBNcPpAbilHzQnumxBEupe0Dg/pwoQWCywTYJN6Yf/6+ # PzcK39bVFKrEyc4Z1Y/yXvAzD7nX8X78kSHvxYYEQfzruLIVQjUUQ7Mp3TiJvljk # mLdcYqavjawgC2zmZU4L2Lx4Su7iVIkhNWj57WkfooSzLrAjueYQIJEltAt8Qmn6 # x3+u3xI/myNKujMpaqgTAU5Gk2J2UApshq5Zwe8HpnVwWoxS3QetXdA/f4AXwZOk # TpnKPYQa7edPLSSAbAs= # =GzjR # -----END PGP SIGNATURE----- # gpg: Signature made Thu 06 Jul 2023 10:57:31 AM BST # gpg: using RSA key 96D8D110CF7AF8084F88590134C2B58765A47395 # gpg: issuer "qemu_oss@crudebyte.com" # gpg: Good signature from "Christian Schoenebeck <qemu_oss@crudebyte.com>" [unknown] # gpg: WARNING: This key is not certified with a trusted signature! # gpg: There is no indication that the signature belongs to the owner. # Primary key fingerprint: ECAB 1A45 4014 1413 BA38 4926 30DB 47C3 A012 D5F4 # Subkey fingerprint: 96D8 D110 CF7A F808 4F88 5901 34C2 B587 65A4 7395 * tag 'pull-9p-20230706' of https://github.com/cschoenebeck/qemu: MAINTAINERS: raise status of 9p to 'Maintained' 9pfs: deprecate 'proxy' backend Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson
commit
97c81ef4b8
11
MAINTAINERS
11
MAINTAINERS
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@ -2120,17 +2120,24 @@ F: include/sysemu/balloon.h
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virtio-9p
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M: Greg Kurz <groug@kaod.org>
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M: Christian Schoenebeck <qemu_oss@crudebyte.com>
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S: Odd Fixes
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S: Maintained
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W: https://wiki.qemu.org/Documentation/9p
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F: hw/9pfs/
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X: hw/9pfs/xen-9p*
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X: hw/9pfs/9p-proxy*
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F: fsdev/
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F: docs/tools/virtfs-proxy-helper.rst
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X: fsdev/virtfs-proxy-helper.c
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F: tests/qtest/virtio-9p-test.c
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F: tests/qtest/libqos/virtio-9p*
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T: git https://gitlab.com/gkurz/qemu.git 9p-next
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T: git https://github.com/cschoenebeck/qemu.git 9p.next
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virtio-9p-proxy
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F: hw/9pfs/9p-proxy*
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F: fsdev/virtfs-proxy-helper.c
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F: docs/tools/virtfs-proxy-helper.rst
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S: Obsolete
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virtio-blk
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M: Stefan Hajnoczi <stefanha@redhat.com>
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L: qemu-block@nongnu.org
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@ -343,6 +343,29 @@ the addition of volatile memory support, it is now necessary to distinguish
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between persistent and volatile memory backends. As such, memdev is deprecated
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in favor of persistent-memdev.
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``-fsdev proxy`` and ``-virtfs proxy`` (since 8.1)
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The 9p ``proxy`` filesystem backend driver has been deprecated and will be
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removed (along with its proxy helper daemon) in a future version of QEMU. Please
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use ``-fsdev local`` or ``-virtfs local`` for using the 9p ``local`` filesystem
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backend, or alternatively consider deploying virtiofsd instead.
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The 9p ``proxy`` backend was originally developed as an alternative to the 9p
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``local`` backend. The idea was to enhance security by dispatching actual low
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level filesystem operations from 9p server (QEMU process) over to a separate
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process (the virtfs-proxy-helper binary). However this alternative never gained
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momentum. The proxy backend is much slower than the local backend, hasn't seen
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any development in years, and showed to be less secure, especially due to the
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fact that its helper daemon must be run as root, whereas with the local backend
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QEMU is typically run as unprivileged user and allows to tighten behaviour by
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mapping permissions et al by using its 'mapped' security model option.
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Nowadays it would make sense to reimplement the ``proxy`` backend by using
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QEMU's ``vhost`` feature, which would eliminate the high latency costs under
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which the 9p ``proxy`` backend currently suffers. However as of to date nobody
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has indicated plans for such kind of reimplemention unfortunately.
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Block device options
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''''''''''''''''''''
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@ -9,6 +9,9 @@ Synopsis
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Description
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-----------
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NOTE: The 9p 'proxy' backend is deprecated (since QEMU 8.1) and will be
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removed, along with this daemon, in a future version of QEMU!
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Pass-through security model in QEMU 9p server needs root privilege to do
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few file operations (like chown, chmod to any mode/uid:gid). There are two
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issues in pass-through security model:
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@ -133,6 +133,14 @@ int qemu_fsdev_add(QemuOpts *opts, Error **errp)
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}
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if (fsdriver) {
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if (strncmp(fsdriver, "proxy", 5) == 0) {
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warn_report(
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"'-fsdev proxy' and '-virtfs proxy' are deprecated, use "
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"'local' instead of 'proxy, or consider deploying virtiofsd "
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"as alternative to 9p"
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);
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}
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for (i = 0; i < ARRAY_SIZE(FsDrivers); i++) {
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if (strcmp(FsDrivers[i].name, fsdriver) == 0) {
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break;
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@ -9,6 +9,11 @@
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* the COPYING file in the top-level directory.
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*/
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/*
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* NOTE: The 9p 'proxy' backend is deprecated (since QEMU 8.1) and will be
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* removed in a future version of QEMU!
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*/
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#include "qemu/osdep.h"
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#include <glib/gstdio.h>
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#include <sys/resource.h>
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@ -1057,6 +1062,10 @@ int main(int argc, char **argv)
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struct statfs st_fs;
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#endif
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fprintf(stderr, "NOTE: The 9p 'proxy' backend is deprecated (since "
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"QEMU 8.1) and will be removed in a future version of "
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"QEMU!\n");
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prog_name = g_path_get_basename(argv[0]);
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is_daemon = true;
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@ -15,6 +15,11 @@
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* https://wiki.qemu.org/Documentation/9p
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*/
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/*
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* NOTE: The 9p 'proxy' backend is deprecated (since QEMU 8.1) and will be
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* removed in a future version of QEMU!
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*/
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#include "qemu/osdep.h"
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#include <sys/socket.h>
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#include <sys/un.h>
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@ -10,6 +10,11 @@
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* the COPYING file in the top-level directory.
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*/
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/*
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* NOTE: The 9p 'proxy' backend is deprecated (since QEMU 8.1) and will be
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* removed in a future version of QEMU!
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*/
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#ifndef QEMU_9P_PROXY_H
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#define QEMU_9P_PROXY_H
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@ -4179,7 +4179,7 @@ if have_block
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summary_info += {'Block whitelist (ro)': get_option('block_drv_ro_whitelist')}
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summary_info += {'Use block whitelist in tools': get_option('block_drv_whitelist_in_tools')}
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summary_info += {'VirtFS (9P) support': have_virtfs}
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summary_info += {'VirtFS (9P) Proxy Helper support': have_virtfs_proxy_helper}
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summary_info += {'VirtFS (9P) Proxy Helper support (deprecated)': have_virtfs_proxy_helper}
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summary_info += {'Live block migration': config_host_data.get('CONFIG_LIVE_BLOCK_MIGRATION')}
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summary_info += {'replication support': config_host_data.get('CONFIG_REPLICATION')}
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summary_info += {'bochs support': get_option('bochs').allowed()}
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@ -1735,7 +1735,9 @@ SRST
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Accesses to the filesystem are done by QEMU.
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``proxy``
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Accesses to the filesystem are done by virtfs-proxy-helper(1).
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Accesses to the filesystem are done by virtfs-proxy-helper(1). This
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option is deprecated (since QEMU 8.1) and will be removed in a future
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version of QEMU. Use ``local`` instead.
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``synth``
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Synthetic filesystem, only used by QTests.
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@ -1867,6 +1869,8 @@ SRST
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``proxy``
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Accesses to the filesystem are done by virtfs-proxy-helper(1).
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This option is deprecated (since QEMU 8.1) and will be removed in a
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future version of QEMU. Use ``local`` instead.
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``synth``
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Synthetic filesystem, only used by QTests.
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