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Gautham R Shenoy74db9202010-04-29 17:44:43 +05301/*
2 * Virtio 9p
3 *
4 * Copyright IBM, Corp. 2010
5 *
6 * Authors:
7 * Gautham R Shenoy <ego@in.ibm.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
11 *
12 */
13#include <stdio.h>
14#include <string.h>
15#include "qemu-fsdev.h"
16#include "qemu-queue.h"
17#include "osdep.h"
18#include "qemu-common.h"
Gerd Hoffmann526c5232010-08-25 12:19:49 +020019#include "qemu-config.h"
Gautham R Shenoy74db9202010-04-29 17:44:43 +053020
Aneesh Kumar K.Vfbcbf102011-10-13 12:28:04 +053021static QTAILQ_HEAD(FsDriverEntry_head, FsDriverListEntry) fsdriver_entries =
22 QTAILQ_HEAD_INITIALIZER(fsdriver_entries);
Gautham R Shenoy74db9202010-04-29 17:44:43 +053023
Aneesh Kumar K.Vfbcbf102011-10-13 12:28:04 +053024static FsDriverTable FsDrivers[] = {
Anthony Liguori9f107512010-04-29 17:44:44 +053025 { .name = "local", .ops = &local_ops},
Aneesh Kumar K.V5f542222011-08-02 11:35:54 +053026 { .name = "handle", .ops = &handle_ops},
Gautham R Shenoy74db9202010-04-29 17:44:43 +053027};
28
29int qemu_fsdev_add(QemuOpts *opts)
30{
Aneesh Kumar K.Vfbcbf102011-10-13 12:28:04 +053031 struct FsDriverListEntry *fsle;
Gautham R Shenoy74db9202010-04-29 17:44:43 +053032 int i;
Harsh Prateek Bora9f506892010-10-18 15:36:36 +053033 const char *fsdev_id = qemu_opts_id(opts);
Aneesh Kumar K.Vfbcbf102011-10-13 12:28:04 +053034 const char *fsdriver = qemu_opt_get(opts, "fsdriver");
Harsh Prateek Bora9f506892010-10-18 15:36:36 +053035 const char *path = qemu_opt_get(opts, "path");
36 const char *sec_model = qemu_opt_get(opts, "security_model");
Aneesh Kumar K.Vd3ab98e2011-10-12 19:11:23 +053037 const char *writeout = qemu_opt_get(opts, "writeout");
38
Gautham R Shenoy74db9202010-04-29 17:44:43 +053039
Harsh Prateek Bora9f506892010-10-18 15:36:36 +053040 if (!fsdev_id) {
Gautham R Shenoy74db9202010-04-29 17:44:43 +053041 fprintf(stderr, "fsdev: No id specified\n");
42 return -1;
43 }
44
Aneesh Kumar K.Vfbcbf102011-10-13 12:28:04 +053045 if (fsdriver) {
46 for (i = 0; i < ARRAY_SIZE(FsDrivers); i++) {
47 if (strcmp(FsDrivers[i].name, fsdriver) == 0) {
Harsh Prateek Bora9f506892010-10-18 15:36:36 +053048 break;
49 }
Gautham R Shenoy74db9202010-04-29 17:44:43 +053050 }
Gautham R Shenoy74db9202010-04-29 17:44:43 +053051
Aneesh Kumar K.Vfbcbf102011-10-13 12:28:04 +053052 if (i == ARRAY_SIZE(FsDrivers)) {
53 fprintf(stderr, "fsdev: fsdriver %s not found\n", fsdriver);
Harsh Prateek Bora9f506892010-10-18 15:36:36 +053054 return -1;
55 }
56 } else {
Aneesh Kumar K.Vfbcbf102011-10-13 12:28:04 +053057 fprintf(stderr, "fsdev: No fsdriver specified\n");
Gautham R Shenoy74db9202010-04-29 17:44:43 +053058 return -1;
59 }
60
Harsh Prateek Bora9f506892010-10-18 15:36:36 +053061 if (!sec_model) {
Venkateswararao Jujjuri (JV)9ce56db2010-06-14 13:34:40 -070062 fprintf(stderr, "fsdev: No security_model specified.\n");
63 return -1;
64 }
65
Harsh Prateek Bora9f506892010-10-18 15:36:36 +053066 if (!path) {
67 fprintf(stderr, "fsdev: No path specified.\n");
68 return -1;
69 }
70
Anthony Liguori7267c092011-08-20 22:09:37 -050071 fsle = g_malloc(sizeof(*fsle));
Gautham R Shenoy74db9202010-04-29 17:44:43 +053072
Anthony Liguori7267c092011-08-20 22:09:37 -050073 fsle->fse.fsdev_id = g_strdup(fsdev_id);
74 fsle->fse.path = g_strdup(path);
Aneesh Kumar K.Vfbcbf102011-10-13 12:28:04 +053075 fsle->fse.ops = FsDrivers[i].ops;
Aneesh Kumar K.Vd3ab98e2011-10-12 19:11:23 +053076 fsle->fse.export_flags = 0;
77 if (writeout) {
78 if (!strcmp(writeout, "immediate")) {
Aneesh Kumar K.Vb97400c2011-10-13 13:21:00 +053079 fsle->fse.export_flags |= V9FS_IMMEDIATE_WRITEOUT;
Aneesh Kumar K.Vd3ab98e2011-10-12 19:11:23 +053080 }
81 }
Aneesh Kumar K.Vb97400c2011-10-13 13:21:00 +053082
83 if (!strcmp(sec_model, "passthrough")) {
84 fsle->fse.export_flags |= V9FS_SM_PASSTHROUGH;
85 } else if (!strcmp(sec_model, "mapped")) {
86 fsle->fse.export_flags |= V9FS_SM_MAPPED;
87 } else if (!strcmp(sec_model, "none")) {
88 fsle->fse.export_flags |= V9FS_SM_NONE;
89 } else {
90 fprintf(stderr, "Default to security_model=none. You may want"
91 " enable advanced security model using "
92 "security option:\n\t security_model=passthrough\n\t "
93 "security_model=mapped\n");
94
95 fsle->fse.export_flags |= V9FS_SM_NONE;
96 }
97
Aneesh Kumar K.Vfbcbf102011-10-13 12:28:04 +053098 QTAILQ_INSERT_TAIL(&fsdriver_entries, fsle, next);
Gautham R Shenoy74db9202010-04-29 17:44:43 +053099 return 0;
Gautham R Shenoy74db9202010-04-29 17:44:43 +0530100}
101
Aneesh Kumar K.Vfbcbf102011-10-13 12:28:04 +0530102FsDriverEntry *get_fsdev_fsentry(char *id)
Gautham R Shenoy74db9202010-04-29 17:44:43 +0530103{
Harsh Prateek Bora9f506892010-10-18 15:36:36 +0530104 if (id) {
Aneesh Kumar K.Vfbcbf102011-10-13 12:28:04 +0530105 struct FsDriverListEntry *fsle;
Gautham R Shenoy74db9202010-04-29 17:44:43 +0530106
Aneesh Kumar K.Vfbcbf102011-10-13 12:28:04 +0530107 QTAILQ_FOREACH(fsle, &fsdriver_entries, next) {
Harsh Prateek Bora9f506892010-10-18 15:36:36 +0530108 if (strcmp(fsle->fse.fsdev_id, id) == 0) {
109 return &fsle->fse;
110 }
Gautham R Shenoy74db9202010-04-29 17:44:43 +0530111 }
112 }
113 return NULL;
114}
Gerd Hoffmann526c5232010-08-25 12:19:49 +0200115
116static void fsdev_register_config(void)
117{
118 qemu_add_opts(&qemu_fsdev_opts);
119 qemu_add_opts(&qemu_virtfs_opts);
120}
121machine_init(fsdev_register_config);
122