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1 | /* | |
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" | |
19 | #include "qemu-config.h" | |
20 | ||
21 | static QTAILQ_HEAD(FsDriverEntry_head, FsDriverListEntry) fsdriver_entries = | |
22 | QTAILQ_HEAD_INITIALIZER(fsdriver_entries); | |
23 | ||
24 | static FsDriverTable FsDrivers[] = { | |
25 | { .name = "local", .ops = &local_ops}, | |
26 | #ifdef CONFIG_OPEN_BY_HANDLE | |
27 | { .name = "handle", .ops = &handle_ops}, | |
28 | #endif | |
29 | { .name = "synth", .ops = &synth_ops}, | |
30 | }; | |
31 | ||
32 | int qemu_fsdev_add(QemuOpts *opts) | |
33 | { | |
34 | struct FsDriverListEntry *fsle; | |
35 | int i; | |
36 | const char *fsdev_id = qemu_opts_id(opts); | |
37 | const char *fsdriver = qemu_opt_get(opts, "fsdriver"); | |
38 | const char *path = qemu_opt_get(opts, "path"); | |
39 | const char *sec_model = qemu_opt_get(opts, "security_model"); | |
40 | const char *writeout = qemu_opt_get(opts, "writeout"); | |
41 | bool ro = qemu_opt_get_bool(opts, "readonly", 0); | |
42 | ||
43 | if (!fsdev_id) { | |
44 | fprintf(stderr, "fsdev: No id specified\n"); | |
45 | return -1; | |
46 | } | |
47 | ||
48 | if (fsdriver) { | |
49 | for (i = 0; i < ARRAY_SIZE(FsDrivers); i++) { | |
50 | if (strcmp(FsDrivers[i].name, fsdriver) == 0) { | |
51 | break; | |
52 | } | |
53 | } | |
54 | ||
55 | if (i == ARRAY_SIZE(FsDrivers)) { | |
56 | fprintf(stderr, "fsdev: fsdriver %s not found\n", fsdriver); | |
57 | return -1; | |
58 | } | |
59 | } else { | |
60 | fprintf(stderr, "fsdev: No fsdriver specified\n"); | |
61 | return -1; | |
62 | } | |
63 | ||
64 | if (!strcmp(fsdriver, "local") && !sec_model) { | |
65 | fprintf(stderr, "security model not specified, " | |
66 | "local fs needs security model\nvalid options are:" | |
67 | "\tsecurity_model=[passthrough|mapped|none]\n"); | |
68 | return -1; | |
69 | } | |
70 | ||
71 | if (strcmp(fsdriver, "local") && sec_model) { | |
72 | fprintf(stderr, "only local fs driver needs security model\n"); | |
73 | return -1; | |
74 | } | |
75 | ||
76 | if (!path) { | |
77 | fprintf(stderr, "fsdev: No path specified.\n"); | |
78 | return -1; | |
79 | } | |
80 | ||
81 | fsle = g_malloc(sizeof(*fsle)); | |
82 | ||
83 | fsle->fse.fsdev_id = g_strdup(fsdev_id); | |
84 | fsle->fse.path = g_strdup(path); | |
85 | fsle->fse.ops = FsDrivers[i].ops; | |
86 | fsle->fse.export_flags = 0; | |
87 | if (writeout) { | |
88 | if (!strcmp(writeout, "immediate")) { | |
89 | fsle->fse.export_flags |= V9FS_IMMEDIATE_WRITEOUT; | |
90 | } | |
91 | } | |
92 | if (ro) { | |
93 | fsle->fse.export_flags |= V9FS_RDONLY; | |
94 | } else { | |
95 | fsle->fse.export_flags &= ~V9FS_RDONLY; | |
96 | } | |
97 | ||
98 | if (strcmp(fsdriver, "local")) { | |
99 | goto done; | |
100 | } | |
101 | ||
102 | if (!strcmp(sec_model, "passthrough")) { | |
103 | fsle->fse.export_flags |= V9FS_SM_PASSTHROUGH; | |
104 | } else if (!strcmp(sec_model, "mapped")) { | |
105 | fsle->fse.export_flags |= V9FS_SM_MAPPED; | |
106 | } else if (!strcmp(sec_model, "none")) { | |
107 | fsle->fse.export_flags |= V9FS_SM_NONE; | |
108 | } else { | |
109 | fprintf(stderr, "Invalid security model %s specified, valid options are" | |
110 | "\n\t [passthrough|mapped|none]\n", sec_model); | |
111 | return -1; | |
112 | } | |
113 | done: | |
114 | QTAILQ_INSERT_TAIL(&fsdriver_entries, fsle, next); | |
115 | return 0; | |
116 | } | |
117 | ||
118 | FsDriverEntry *get_fsdev_fsentry(char *id) | |
119 | { | |
120 | if (id) { | |
121 | struct FsDriverListEntry *fsle; | |
122 | ||
123 | QTAILQ_FOREACH(fsle, &fsdriver_entries, next) { | |
124 | if (strcmp(fsle->fse.fsdev_id, id) == 0) { | |
125 | return &fsle->fse; | |
126 | } | |
127 | } | |
128 | } | |
129 | return NULL; | |
130 | } | |
131 | ||
132 | static void fsdev_register_config(void) | |
133 | { | |
134 | qemu_add_opts(&qemu_fsdev_opts); | |
135 | qemu_add_opts(&qemu_virtfs_opts); | |
136 | } | |
137 | machine_init(fsdev_register_config); | |
138 |