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4c793dda22
Add new proxy filesystem driver to add root privilege to qemu process. It needs a helper process to be started by root user. Following command line can be used to utilize proxy filesystem driver -virtfs proxy,id=<id>,mount_tag=<tag>,socket_fd=<socket-fd> Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
108 lines
2.6 KiB
C
108 lines
2.6 KiB
C
/*
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* Virtio 9p
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*
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* Copyright IBM, Corp. 2010
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*
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* Authors:
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* Gautham R Shenoy <ego@in.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#include <stdio.h>
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#include <string.h>
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#include "qemu-fsdev.h"
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#include "qemu-queue.h"
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#include "osdep.h"
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#include "qemu-common.h"
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#include "qemu-config.h"
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static QTAILQ_HEAD(FsDriverEntry_head, FsDriverListEntry) fsdriver_entries =
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QTAILQ_HEAD_INITIALIZER(fsdriver_entries);
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static FsDriverTable FsDrivers[] = {
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{ .name = "local", .ops = &local_ops},
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#ifdef CONFIG_OPEN_BY_HANDLE
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{ .name = "handle", .ops = &handle_ops},
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#endif
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{ .name = "synth", .ops = &synth_ops},
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{ .name = "proxy", .ops = &proxy_ops},
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};
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int qemu_fsdev_add(QemuOpts *opts)
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{
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int i;
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struct FsDriverListEntry *fsle;
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const char *fsdev_id = qemu_opts_id(opts);
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const char *fsdriver = qemu_opt_get(opts, "fsdriver");
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const char *writeout = qemu_opt_get(opts, "writeout");
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bool ro = qemu_opt_get_bool(opts, "readonly", 0);
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if (!fsdev_id) {
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fprintf(stderr, "fsdev: No id specified\n");
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return -1;
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}
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if (fsdriver) {
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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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}
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}
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if (i == ARRAY_SIZE(FsDrivers)) {
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fprintf(stderr, "fsdev: fsdriver %s not found\n", fsdriver);
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return -1;
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}
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} else {
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fprintf(stderr, "fsdev: No fsdriver specified\n");
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return -1;
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}
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fsle = g_malloc0(sizeof(*fsle));
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fsle->fse.fsdev_id = g_strdup(fsdev_id);
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fsle->fse.ops = FsDrivers[i].ops;
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if (writeout) {
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if (!strcmp(writeout, "immediate")) {
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fsle->fse.export_flags |= V9FS_IMMEDIATE_WRITEOUT;
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}
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}
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if (ro) {
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fsle->fse.export_flags |= V9FS_RDONLY;
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} else {
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fsle->fse.export_flags &= ~V9FS_RDONLY;
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}
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if (fsle->fse.ops->parse_opts) {
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if (fsle->fse.ops->parse_opts(opts, &fsle->fse)) {
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return -1;
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}
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}
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QTAILQ_INSERT_TAIL(&fsdriver_entries, fsle, next);
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return 0;
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}
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FsDriverEntry *get_fsdev_fsentry(char *id)
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{
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if (id) {
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struct FsDriverListEntry *fsle;
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QTAILQ_FOREACH(fsle, &fsdriver_entries, next) {
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if (strcmp(fsle->fse.fsdev_id, id) == 0) {
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return &fsle->fse;
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}
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}
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}
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return NULL;
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}
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static void fsdev_register_config(void)
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{
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qemu_add_opts(&qemu_fsdev_opts);
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qemu_add_opts(&qemu_virtfs_opts);
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}
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machine_init(fsdev_register_config);
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