summaryrefslogtreecommitdiff
path: root/fsdev/qemu-fsdev.c
blob: 6684f7ea90f886aac26902f507c1a8993bcc1f67 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
/*
 * Virtio 9p
 *
 * Copyright IBM, Corp. 2010
 *
 * Authors:
 *  Gautham R Shenoy <ego@in.ibm.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2.  See
 * the COPYING file in the top-level directory.
 *
 */
#include <stdio.h>
#include <string.h>
#include "qemu-fsdev.h"
#include "qemu-queue.h"
#include "osdep.h"
#include "qemu-common.h"
#include "qemu-config.h"

static QTAILQ_HEAD(FsDriverEntry_head, FsDriverListEntry) fsdriver_entries =
    QTAILQ_HEAD_INITIALIZER(fsdriver_entries);

static FsDriverTable FsDrivers[] = {
    { .name = "local", .ops = &local_ops},
#ifdef CONFIG_OPEN_BY_HANDLE
    { .name = "handle", .ops = &handle_ops},
#endif
    { .name = "synth", .ops = &synth_ops},
};

int qemu_fsdev_add(QemuOpts *opts)
{
    struct FsDriverListEntry *fsle;
    int i;
    const char *fsdev_id = qemu_opts_id(opts);
    const char *fsdriver = qemu_opt_get(opts, "fsdriver");
    const char *path = qemu_opt_get(opts, "path");
    const char *sec_model = qemu_opt_get(opts, "security_model");
    const char *writeout = qemu_opt_get(opts, "writeout");
    bool ro = qemu_opt_get_bool(opts, "readonly", 0);

    if (!fsdev_id) {
        fprintf(stderr, "fsdev: No id specified\n");
        return -1;
    }

    if (fsdriver) {
        for (i = 0; i < ARRAY_SIZE(FsDrivers); i++) {
            if (strcmp(FsDrivers[i].name, fsdriver) == 0) {
                break;
            }
        }

        if (i == ARRAY_SIZE(FsDrivers)) {
            fprintf(stderr, "fsdev: fsdriver %s not found\n", fsdriver);
            return -1;
        }
    } else {
        fprintf(stderr, "fsdev: No fsdriver specified\n");
        return -1;
    }

    if (!strcmp(fsdriver, "local") && !sec_model) {
        fprintf(stderr, "security model not specified, "
                "local fs needs security model\nvalid options are:"
                "\tsecurity_model=[passthrough|mapped|none]\n");
        return -1;
    }

    if (strcmp(fsdriver, "local") && sec_model) {
        fprintf(stderr, "only local fs driver needs security model\n");
        return -1;
    }

    if (!path) {
        fprintf(stderr, "fsdev: No path specified.\n");
        return -1;
    }

    fsle = g_malloc(sizeof(*fsle));

    fsle->fse.fsdev_id = g_strdup(fsdev_id);
    fsle->fse.path = g_strdup(path);
    fsle->fse.ops = FsDrivers[i].ops;
    fsle->fse.export_flags = 0;
    if (writeout) {
        if (!strcmp(writeout, "immediate")) {
            fsle->fse.export_flags |= V9FS_IMMEDIATE_WRITEOUT;
        }
    }
    if (ro) {
        fsle->fse.export_flags |= V9FS_RDONLY;
    } else {
        fsle->fse.export_flags &= ~V9FS_RDONLY;
    }

    if (strcmp(fsdriver, "local")) {
        goto done;
    }

    if (!strcmp(sec_model, "passthrough")) {
        fsle->fse.export_flags |= V9FS_SM_PASSTHROUGH;
    } else if (!strcmp(sec_model, "mapped")) {
        fsle->fse.export_flags |= V9FS_SM_MAPPED;
    } else if (!strcmp(sec_model, "none")) {
        fsle->fse.export_flags |= V9FS_SM_NONE;
    } else {
        fprintf(stderr, "Invalid security model %s specified, valid options are"
                "\n\t [passthrough|mapped|none]\n", sec_model);
        return -1;
    }
done:
    QTAILQ_INSERT_TAIL(&fsdriver_entries, fsle, next);
    return 0;
}

FsDriverEntry *get_fsdev_fsentry(char *id)
{
    if (id) {
        struct FsDriverListEntry *fsle;

        QTAILQ_FOREACH(fsle, &fsdriver_entries, next) {
            if (strcmp(fsle->fse.fsdev_id, id) == 0) {
                return &fsle->fse;
            }
        }
    }
    return NULL;
}

static void fsdev_register_config(void)
{
    qemu_add_opts(&qemu_fsdev_opts);
    qemu_add_opts(&qemu_virtfs_opts);
}
machine_init(fsdev_register_config);